diff options
Diffstat (limited to 'drivers/pnp')
29 files changed, 8585 insertions, 0 deletions
diff --git a/drivers/pnp/Kconfig b/drivers/pnp/Kconfig new file mode 100644 index 0000000000..a72141dffa --- /dev/null +++ b/drivers/pnp/Kconfig @@ -0,0 +1,48 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Plug and Play configuration +# + +menuconfig PNP + bool "Plug and Play support" + depends on HAS_IOMEM + depends on ISA || ACPI + help + Plug and Play (PnP) is a standard for peripherals which allows those + peripherals to be configured by software, e.g. assign IRQ's or other + parameters. No jumpers on the cards are needed, instead the values + are provided to the cards from the BIOS, from the operating system, + or using a user-space utility. + + Say Y here if you would like Linux to configure your Plug and Play + devices. You should then also say Y to all of the protocols below. + Alternatively, you can say N here and configure your PnP devices + using user space utilities such as the isapnptools package. + + If unsure, say Y. + +config PNP_DEBUG_MESSAGES + default y + bool "PNP debugging messages" + depends on PNP + help + Say Y here if you want the PNP layer to be able to produce debugging + messages if needed. The messages can be enabled at boot-time with + the pnp.debug kernel parameter. + + This option allows you to save a bit of space if you do not want + the messages to even be built into the kernel. + + If you have any doubts about this, say Y here. + +if PNP + +comment "Protocols" + +source "drivers/pnp/isapnp/Kconfig" + +source "drivers/pnp/pnpbios/Kconfig" + +source "drivers/pnp/pnpacpi/Kconfig" + +endif # PNP diff --git a/drivers/pnp/Makefile b/drivers/pnp/Makefile new file mode 100644 index 0000000000..71d532f182 --- /dev/null +++ b/drivers/pnp/Makefile @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux Plug-and-Play Support. +# + +obj-y := pnp.o + +pnp-y := core.o card.o driver.o resource.o manager.o support.o interface.o quirks.o + +obj-$(CONFIG_PNPACPI) += pnpacpi/ +obj-$(CONFIG_PNPBIOS) += pnpbios/ +obj-$(CONFIG_ISAPNP) += isapnp/ + +# pnp_system_init goes after pnpacpi/pnpbios init +pnp-y += system.o diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h new file mode 100644 index 0000000000..e74a0f6a31 --- /dev/null +++ b/drivers/pnp/base.h @@ -0,0 +1,186 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ + +extern struct mutex pnp_lock; +extern const struct attribute_group *pnp_dev_groups[]; + +int pnp_register_protocol(struct pnp_protocol *protocol); +void pnp_unregister_protocol(struct pnp_protocol *protocol); + +#define PNP_EISA_ID_MASK 0x7fffffff +void pnp_eisa_id_to_string(u32 id, char *str); +struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *, int id, + const char *pnpid); +struct pnp_card *pnp_alloc_card(struct pnp_protocol *, int id, char *pnpid); + +int pnp_add_device(struct pnp_dev *dev); +struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id); + +int pnp_add_card(struct pnp_card *card); +void pnp_remove_card(struct pnp_card *card); +int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev); +void pnp_remove_card_device(struct pnp_dev *dev); + +struct pnp_port { + resource_size_t min; /* min base number */ + resource_size_t max; /* max base number */ + resource_size_t align; /* align boundary */ + resource_size_t size; /* size of range */ + unsigned char flags; /* port flags */ +}; + +#define PNP_IRQ_NR 256 +typedef struct { DECLARE_BITMAP(bits, PNP_IRQ_NR); } pnp_irq_mask_t; + +struct pnp_irq { + pnp_irq_mask_t map; /* bitmap for IRQ lines */ + unsigned char flags; /* IRQ flags */ +}; + +struct pnp_dma { + unsigned char map; /* bitmask for DMA channels */ + unsigned char flags; /* DMA flags */ +}; + +struct pnp_mem { + resource_size_t min; /* min base number */ + resource_size_t max; /* max base number */ + resource_size_t align; /* align boundary */ + resource_size_t size; /* size of range */ + unsigned char flags; /* memory flags */ +}; + +#define PNP_OPTION_DEPENDENT 0x80000000 +#define PNP_OPTION_SET_MASK 0xffff +#define PNP_OPTION_SET_SHIFT 12 +#define PNP_OPTION_PRIORITY_MASK 0xfff +#define PNP_OPTION_PRIORITY_SHIFT 0 + +#define PNP_RES_PRIORITY_PREFERRED 0 +#define PNP_RES_PRIORITY_ACCEPTABLE 1 +#define PNP_RES_PRIORITY_FUNCTIONAL 2 +#define PNP_RES_PRIORITY_INVALID PNP_OPTION_PRIORITY_MASK + +struct pnp_option { + struct list_head list; + unsigned int flags; /* independent/dependent, set, priority */ + + unsigned long type; /* IORESOURCE_{IO,MEM,IRQ,DMA} */ + union { + struct pnp_port port; + struct pnp_irq irq; + struct pnp_dma dma; + struct pnp_mem mem; + } u; +}; + +int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags, + pnp_irq_mask_t *map, unsigned char flags); +int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags, + unsigned char map, unsigned char flags); +int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags, + resource_size_t min, resource_size_t max, + resource_size_t align, resource_size_t size, + unsigned char flags); +int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags, + resource_size_t min, resource_size_t max, + resource_size_t align, resource_size_t size, + unsigned char flags); + +static inline int pnp_option_is_dependent(struct pnp_option *option) +{ + return option->flags & PNP_OPTION_DEPENDENT ? 1 : 0; +} + +static inline unsigned int pnp_option_set(struct pnp_option *option) +{ + return (option->flags >> PNP_OPTION_SET_SHIFT) & PNP_OPTION_SET_MASK; +} + +static inline unsigned int pnp_option_priority(struct pnp_option *option) +{ + return (option->flags >> PNP_OPTION_PRIORITY_SHIFT) & + PNP_OPTION_PRIORITY_MASK; +} + +static inline unsigned int pnp_new_dependent_set(struct pnp_dev *dev, + int priority) +{ + unsigned int flags; + + if (priority > PNP_RES_PRIORITY_FUNCTIONAL) { + dev_warn(&dev->dev, "invalid dependent option priority %d " + "clipped to %d", priority, + PNP_RES_PRIORITY_INVALID); + priority = PNP_RES_PRIORITY_INVALID; + } + + flags = PNP_OPTION_DEPENDENT | + ((dev->num_dependent_sets & PNP_OPTION_SET_MASK) << + PNP_OPTION_SET_SHIFT) | + ((priority & PNP_OPTION_PRIORITY_MASK) << + PNP_OPTION_PRIORITY_SHIFT); + + dev->num_dependent_sets++; + + return flags; +} + +char *pnp_option_priority_name(struct pnp_option *option); +void dbg_pnp_show_option(struct pnp_dev *dev, struct pnp_option *option); + +void pnp_init_resources(struct pnp_dev *dev); + +void pnp_fixup_device(struct pnp_dev *dev); +void pnp_free_options(struct pnp_dev *dev); +int __pnp_add_device(struct pnp_dev *dev); +void __pnp_remove_device(struct pnp_dev *dev); + +int pnp_check_port(struct pnp_dev *dev, struct resource *res); +int pnp_check_mem(struct pnp_dev *dev, struct resource *res); +int pnp_check_irq(struct pnp_dev *dev, struct resource *res); +#ifdef CONFIG_ISA_DMA_API +int pnp_check_dma(struct pnp_dev *dev, struct resource *res); +#endif + +char *pnp_resource_type_name(struct resource *res); +void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc); + +void pnp_free_resources(struct pnp_dev *dev); +unsigned long pnp_resource_type(struct resource *res); + +struct pnp_resource { + struct list_head list; + struct resource res; +}; + +void pnp_free_resource(struct pnp_resource *pnp_res); + +struct pnp_resource *pnp_add_resource(struct pnp_dev *dev, + struct resource *res); +struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq, + int flags); +struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma, + int flags); +struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev, + resource_size_t start, + resource_size_t end, int flags); +struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev, + resource_size_t start, + resource_size_t end, int flags); +struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev, + resource_size_t start, + resource_size_t end); + +extern int pnp_debug; + +#if defined(CONFIG_PNP_DEBUG_MESSAGES) +#define pnp_dbg(dev, format, arg...) \ + ({ if (pnp_debug) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; }) +#else +#define pnp_dbg(dev, format, arg...) \ + ({ if (0) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; }) +#endif diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c new file mode 100644 index 0000000000..9610a9f08f --- /dev/null +++ b/drivers/pnp/card.c @@ -0,0 +1,457 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * card.c - contains functions for managing groups of PnP devices + * + * Copyright 2002 Adam Belay <ambx1@neo.rr.com> + */ + +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/ctype.h> +#include <linux/slab.h> +#include <linux/pnp.h> +#include <linux/dma-mapping.h> +#include "base.h" + +LIST_HEAD(pnp_cards); +static LIST_HEAD(pnp_card_drivers); + +static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv, + struct pnp_card *card) +{ + const struct pnp_card_device_id *drv_id = drv->id_table; + + while (*drv_id->id) { + if (compare_pnp_id(card->id, drv_id->id)) { + int i = 0; + + for (;;) { + int found; + struct pnp_dev *dev; + + if (i == PNP_MAX_DEVICES || + !*drv_id->devs[i].id) + return drv_id; + found = 0; + card_for_each_dev(card, dev) { + if (compare_pnp_id(dev->id, + drv_id->devs[i].id)) { + found = 1; + break; + } + } + if (!found) + break; + i++; + } + } + drv_id++; + } + return NULL; +} + +static void card_remove(struct pnp_dev *dev) +{ + dev->card_link = NULL; +} + +static void card_remove_first(struct pnp_dev *dev) +{ + struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver); + + if (!dev->card || !drv) + return; + if (drv->remove) + drv->remove(dev->card_link); + drv->link.remove = &card_remove; + kfree(dev->card_link); + card_remove(dev); +} + +static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv) +{ + const struct pnp_card_device_id *id; + struct pnp_card_link *clink; + struct pnp_dev *dev; + + if (!drv->probe) + return 0; + id = match_card(drv, card); + if (!id) + return 0; + + clink = kzalloc(sizeof(*clink), GFP_KERNEL); + if (!clink) + return 0; + clink->card = card; + clink->driver = drv; + clink->pm_state = PMSG_ON; + + if (drv->probe(clink, id) >= 0) + return 1; + + /* Recovery */ + card_for_each_dev(card, dev) { + if (dev->card_link == clink) + pnp_release_card_device(dev); + } + kfree(clink); + return 0; +} + +/** + * pnp_add_card_id - adds an EISA id to the specified card + * @id: pointer to a pnp_id structure + * @card: pointer to the desired card + */ +static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id) +{ + struct pnp_id *dev_id, *ptr; + + dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); + if (!dev_id) + return NULL; + + dev_id->id[0] = id[0]; + dev_id->id[1] = id[1]; + dev_id->id[2] = id[2]; + dev_id->id[3] = tolower(id[3]); + dev_id->id[4] = tolower(id[4]); + dev_id->id[5] = tolower(id[5]); + dev_id->id[6] = tolower(id[6]); + dev_id->id[7] = '\0'; + + dev_id->next = NULL; + ptr = card->id; + while (ptr && ptr->next) + ptr = ptr->next; + if (ptr) + ptr->next = dev_id; + else + card->id = dev_id; + + return dev_id; +} + +static void pnp_free_card_ids(struct pnp_card *card) +{ + struct pnp_id *id; + struct pnp_id *next; + + id = card->id; + while (id) { + next = id->next; + kfree(id); + id = next; + } +} + +static void pnp_release_card(struct device *dmdev) +{ + struct pnp_card *card = to_pnp_card(dmdev); + + pnp_free_card_ids(card); + kfree(card); +} + +struct pnp_card *pnp_alloc_card(struct pnp_protocol *protocol, int id, char *pnpid) +{ + struct pnp_card *card; + struct pnp_id *dev_id; + + card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL); + if (!card) + return NULL; + + card->protocol = protocol; + card->number = id; + + card->dev.parent = &card->protocol->dev; + dev_set_name(&card->dev, "%02x:%02x", card->protocol->number, card->number); + + card->dev.coherent_dma_mask = DMA_BIT_MASK(24); + card->dev.dma_mask = &card->dev.coherent_dma_mask; + + dev_id = pnp_add_card_id(card, pnpid); + if (!dev_id) { + kfree(card); + return NULL; + } + + return card; +} + +static ssize_t name_show(struct device *dmdev, + struct device_attribute *attr, char *buf) +{ + char *str = buf; + struct pnp_card *card = to_pnp_card(dmdev); + + str += sprintf(str, "%s\n", card->name); + return (str - buf); +} + +static DEVICE_ATTR_RO(name); + +static ssize_t card_id_show(struct device *dmdev, + struct device_attribute *attr, char *buf) +{ + char *str = buf; + struct pnp_card *card = to_pnp_card(dmdev); + struct pnp_id *pos = card->id; + + while (pos) { + str += sprintf(str, "%s\n", pos->id); + pos = pos->next; + } + return (str - buf); +} + +static DEVICE_ATTR_RO(card_id); + +static int pnp_interface_attach_card(struct pnp_card *card) +{ + int rc = device_create_file(&card->dev, &dev_attr_name); + + if (rc) + return rc; + + rc = device_create_file(&card->dev, &dev_attr_card_id); + if (rc) + goto err_name; + + return 0; + +err_name: + device_remove_file(&card->dev, &dev_attr_name); + return rc; +} + +/** + * pnp_add_card - adds a PnP card to the PnP Layer + * @card: pointer to the card to add + */ +int pnp_add_card(struct pnp_card *card) +{ + int error; + struct list_head *pos, *temp; + + card->dev.bus = NULL; + card->dev.release = &pnp_release_card; + error = device_register(&card->dev); + if (error) { + dev_err(&card->dev, "could not register (err=%d)\n", error); + put_device(&card->dev); + return error; + } + + pnp_interface_attach_card(card); + mutex_lock(&pnp_lock); + list_add_tail(&card->global_list, &pnp_cards); + list_add_tail(&card->protocol_list, &card->protocol->cards); + mutex_unlock(&pnp_lock); + + /* we wait until now to add devices in order to ensure the drivers + * will be able to use all of the related devices on the card + * without waiting an unreasonable length of time */ + list_for_each(pos, &card->devices) { + struct pnp_dev *dev = card_to_pnp_dev(pos); + __pnp_add_device(dev); + } + + /* match with card drivers */ + list_for_each_safe(pos, temp, &pnp_card_drivers) { + struct pnp_card_driver *drv = + list_entry(pos, struct pnp_card_driver, + global_list); + card_probe(card, drv); + } + return 0; +} + +/** + * pnp_remove_card - removes a PnP card from the PnP Layer + * @card: pointer to the card to remove + */ +void pnp_remove_card(struct pnp_card *card) +{ + struct list_head *pos, *temp; + + device_unregister(&card->dev); + mutex_lock(&pnp_lock); + list_del(&card->global_list); + list_del(&card->protocol_list); + mutex_unlock(&pnp_lock); + list_for_each_safe(pos, temp, &card->devices) { + struct pnp_dev *dev = card_to_pnp_dev(pos); + pnp_remove_card_device(dev); + } +} + +/** + * pnp_add_card_device - adds a device to the specified card + * @card: pointer to the card to add to + * @dev: pointer to the device to add + */ +int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) +{ + dev->dev.parent = &card->dev; + dev->card_link = NULL; + dev_set_name(&dev->dev, "%02x:%02x.%02x", + dev->protocol->number, card->number, dev->number); + mutex_lock(&pnp_lock); + dev->card = card; + list_add_tail(&dev->card_list, &card->devices); + mutex_unlock(&pnp_lock); + return 0; +} + +/** + * pnp_remove_card_device- removes a device from the specified card + * @dev: pointer to the device to remove + */ +void pnp_remove_card_device(struct pnp_dev *dev) +{ + mutex_lock(&pnp_lock); + dev->card = NULL; + list_del(&dev->card_list); + mutex_unlock(&pnp_lock); + __pnp_remove_device(dev); +} + +/** + * pnp_request_card_device - Searches for a PnP device under the specified card + * @clink: pointer to the card link, cannot be NULL + * @id: pointer to a PnP ID structure that explains the rules for finding the device + * @from: Starting place to search from. If NULL it will start from the beginning. + */ +struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, + const char *id, struct pnp_dev *from) +{ + struct list_head *pos; + struct pnp_dev *dev; + struct pnp_card_driver *drv; + struct pnp_card *card; + + if (!clink || !id) + return NULL; + + card = clink->card; + drv = clink->driver; + if (!from) { + pos = card->devices.next; + } else { + if (from->card != card) + return NULL; + pos = from->card_list.next; + } + while (pos != &card->devices) { + dev = card_to_pnp_dev(pos); + if ((!dev->card_link) && compare_pnp_id(dev->id, id)) + goto found; + pos = pos->next; + } + + return NULL; + +found: + dev->card_link = clink; + dev->dev.driver = &drv->link.driver; + if (pnp_bus_type.probe(&dev->dev)) + goto err_out; + if (device_bind_driver(&dev->dev)) + goto err_out; + + return dev; + +err_out: + dev->dev.driver = NULL; + dev->card_link = NULL; + return NULL; +} +EXPORT_SYMBOL(pnp_request_card_device); + +/** + * pnp_release_card_device - call this when the driver no longer needs the device + * @dev: pointer to the PnP device structure + */ +void pnp_release_card_device(struct pnp_dev *dev) +{ + struct pnp_card_driver *drv = dev->card_link->driver; + + drv->link.remove = &card_remove; + device_release_driver(&dev->dev); + drv->link.remove = &card_remove_first; +} +EXPORT_SYMBOL(pnp_release_card_device); + +/* + * suspend/resume callbacks + */ +static int card_suspend(struct pnp_dev *dev, pm_message_t state) +{ + struct pnp_card_link *link = dev->card_link; + + if (link->pm_state.event == state.event) + return 0; + link->pm_state = state; + return link->driver->suspend(link, state); +} + +static int card_resume(struct pnp_dev *dev) +{ + struct pnp_card_link *link = dev->card_link; + + if (link->pm_state.event == PM_EVENT_ON) + return 0; + link->pm_state = PMSG_ON; + link->driver->resume(link); + return 0; +} + +/** + * pnp_register_card_driver - registers a PnP card driver with the PnP Layer + * @drv: pointer to the driver to register + */ +int pnp_register_card_driver(struct pnp_card_driver *drv) +{ + int error; + struct list_head *pos, *temp; + + drv->link.name = drv->name; + drv->link.id_table = NULL; /* this will disable auto matching */ + drv->link.flags = drv->flags; + drv->link.probe = NULL; + drv->link.remove = &card_remove_first; + drv->link.suspend = drv->suspend ? card_suspend : NULL; + drv->link.resume = drv->resume ? card_resume : NULL; + + error = pnp_register_driver(&drv->link); + if (error < 0) + return error; + + mutex_lock(&pnp_lock); + list_add_tail(&drv->global_list, &pnp_card_drivers); + mutex_unlock(&pnp_lock); + + list_for_each_safe(pos, temp, &pnp_cards) { + struct pnp_card *card = + list_entry(pos, struct pnp_card, global_list); + card_probe(card, drv); + } + return 0; +} +EXPORT_SYMBOL(pnp_register_card_driver); + +/** + * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer + * @drv: pointer to the driver to unregister + */ +void pnp_unregister_card_driver(struct pnp_card_driver *drv) +{ + mutex_lock(&pnp_lock); + list_del(&drv->global_list); + mutex_unlock(&pnp_lock); + pnp_unregister_driver(&drv->link); +} +EXPORT_SYMBOL(pnp_unregister_card_driver); diff --git a/drivers/pnp/core.c b/drivers/pnp/core.c new file mode 100644 index 0000000000..6a60c5d833 --- /dev/null +++ b/drivers/pnp/core.c @@ -0,0 +1,240 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * core.c - contains all core device and protocol registration functions + * + * Copyright 2002 Adam Belay <ambx1@neo.rr.com> + */ + +#include <linux/pnp.h> +#include <linux/types.h> +#include <linux/list.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/dma-mapping.h> + +#include "base.h" + +static LIST_HEAD(pnp_protocols); +LIST_HEAD(pnp_global); +DEFINE_MUTEX(pnp_lock); + +/* + * ACPI or PNPBIOS should tell us about all platform devices, so we can + * skip some blind probes. ISAPNP typically enumerates only plug-in ISA + * devices, not built-in things like COM ports. + */ +int pnp_platform_devices; +EXPORT_SYMBOL(pnp_platform_devices); + +static void pnp_remove_protocol(struct pnp_protocol *protocol) +{ + mutex_lock(&pnp_lock); + list_del(&protocol->protocol_list); + mutex_unlock(&pnp_lock); +} + +/** + * pnp_register_protocol - adds a pnp protocol to the pnp layer + * @protocol: pointer to the corresponding pnp_protocol structure + * + * Ex protocols: ISAPNP, PNPBIOS, etc + */ +int pnp_register_protocol(struct pnp_protocol *protocol) +{ + struct list_head *pos; + int nodenum, ret; + + INIT_LIST_HEAD(&protocol->devices); + INIT_LIST_HEAD(&protocol->cards); + nodenum = 0; + + mutex_lock(&pnp_lock); + + /* assign the lowest unused number */ + list_for_each(pos, &pnp_protocols) { + struct pnp_protocol *cur = to_pnp_protocol(pos); + if (cur->number == nodenum) { + pos = &pnp_protocols; + nodenum++; + } + } + + protocol->number = nodenum; + dev_set_name(&protocol->dev, "pnp%d", nodenum); + + list_add_tail(&protocol->protocol_list, &pnp_protocols); + + mutex_unlock(&pnp_lock); + + ret = device_register(&protocol->dev); + if (ret) + pnp_remove_protocol(protocol); + + return ret; +} + +/** + * pnp_unregister_protocol - removes a pnp protocol from the pnp layer + * @protocol: pointer to the corresponding pnp_protocol structure + */ +void pnp_unregister_protocol(struct pnp_protocol *protocol) +{ + pnp_remove_protocol(protocol); + device_unregister(&protocol->dev); +} + +static void pnp_free_ids(struct pnp_dev *dev) +{ + struct pnp_id *id; + struct pnp_id *next; + + id = dev->id; + while (id) { + next = id->next; + kfree(id); + id = next; + } +} + +void pnp_free_resource(struct pnp_resource *pnp_res) +{ + list_del(&pnp_res->list); + kfree(pnp_res); +} + +void pnp_free_resources(struct pnp_dev *dev) +{ + struct pnp_resource *pnp_res, *tmp; + + list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) { + pnp_free_resource(pnp_res); + } +} + +static void pnp_release_device(struct device *dmdev) +{ + struct pnp_dev *dev = to_pnp_dev(dmdev); + + pnp_free_ids(dev); + pnp_free_resources(dev); + pnp_free_options(dev); + kfree(dev); +} + +struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id, + const char *pnpid) +{ + struct pnp_dev *dev; + struct pnp_id *dev_id; + + dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); + if (!dev) + return NULL; + + INIT_LIST_HEAD(&dev->resources); + INIT_LIST_HEAD(&dev->options); + dev->protocol = protocol; + dev->number = id; + dev->dma_mask = DMA_BIT_MASK(24); + + dev->dev.parent = &dev->protocol->dev; + dev->dev.bus = &pnp_bus_type; + dev->dev.dma_mask = &dev->dma_mask; + dev->dev.coherent_dma_mask = dev->dma_mask; + dev->dev.release = &pnp_release_device; + + dev_id = pnp_add_id(dev, pnpid); + if (!dev_id) { + kfree(dev); + return NULL; + } + + dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number); + + return dev; +} + +static void pnp_delist_device(struct pnp_dev *dev) +{ + mutex_lock(&pnp_lock); + list_del(&dev->global_list); + list_del(&dev->protocol_list); + mutex_unlock(&pnp_lock); +} + +int __pnp_add_device(struct pnp_dev *dev) +{ + int ret; + + pnp_fixup_device(dev); + dev->status = PNP_READY; + + mutex_lock(&pnp_lock); + + list_add_tail(&dev->global_list, &pnp_global); + list_add_tail(&dev->protocol_list, &dev->protocol->devices); + + mutex_unlock(&pnp_lock); + + ret = device_register(&dev->dev); + if (ret) + pnp_delist_device(dev); + else if (dev->protocol->can_wakeup) + device_set_wakeup_capable(&dev->dev, + dev->protocol->can_wakeup(dev)); + + return ret; +} + +/* + * pnp_add_device - adds a pnp device to the pnp layer + * @dev: pointer to dev to add + * + * adds to driver model, name database, fixups, interface, etc. + */ +int pnp_add_device(struct pnp_dev *dev) +{ + int ret; + char buf[128]; + int len = 0; + struct pnp_id *id; + + if (dev->card) + return -EINVAL; + + ret = __pnp_add_device(dev); + if (ret) + return ret; + + buf[0] = '\0'; + for (id = dev->id; id; id = id->next) + len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id); + + dev_dbg(&dev->dev, "%s device, IDs%s (%s)\n", dev->protocol->name, buf, + dev->active ? "active" : "disabled"); + return 0; +} + +void __pnp_remove_device(struct pnp_dev *dev) +{ + pnp_delist_device(dev); + device_unregister(&dev->dev); +} + +static int __init pnp_init(void) +{ + return bus_register(&pnp_bus_type); +} + +subsys_initcall(pnp_init); + +int pnp_debug; + +#if defined(CONFIG_PNP_DEBUG_MESSAGES) +module_param_named(debug, pnp_debug, int, 0644); +#endif diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c new file mode 100644 index 0000000000..46c534f6b1 --- /dev/null +++ b/drivers/pnp/driver.c @@ -0,0 +1,316 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * driver.c - device id matching, driver model, etc. + * + * Copyright 2002 Adam Belay <ambx1@neo.rr.com> + */ + +#include <linux/string.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/slab.h> +#include <linux/pnp.h> +#include "base.h" + +static int compare_func(const char *ida, const char *idb) +{ + int i; + + /* we only need to compare the last 4 chars */ + for (i = 3; i < 7; i++) { + if (ida[i] != 'X' && + idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i])) + return 0; + } + return 1; +} + +int compare_pnp_id(struct pnp_id *pos, const char *id) +{ + if (!pos || !id || (strlen(id) != 7)) + return 0; + if (memcmp(id, "ANYDEVS", 7) == 0) + return 1; + while (pos) { + if (memcmp(pos->id, id, 3) == 0) + if (compare_func(pos->id, id) == 1) + return 1; + pos = pos->next; + } + return 0; +} + +static const struct pnp_device_id *match_device(struct pnp_driver *drv, + struct pnp_dev *dev) +{ + const struct pnp_device_id *drv_id = drv->id_table; + + if (!drv_id) + return NULL; + + while (*drv_id->id) { + if (compare_pnp_id(dev->id, drv_id->id)) + return drv_id; + drv_id++; + } + return NULL; +} + +int pnp_device_attach(struct pnp_dev *pnp_dev) +{ + mutex_lock(&pnp_lock); + if (pnp_dev->status != PNP_READY) { + mutex_unlock(&pnp_lock); + return -EBUSY; + } + pnp_dev->status = PNP_ATTACHED; + mutex_unlock(&pnp_lock); + return 0; +} +EXPORT_SYMBOL(pnp_device_attach); + +void pnp_device_detach(struct pnp_dev *pnp_dev) +{ + mutex_lock(&pnp_lock); + if (pnp_dev->status == PNP_ATTACHED) + pnp_dev->status = PNP_READY; + mutex_unlock(&pnp_lock); +} +EXPORT_SYMBOL(pnp_device_detach); + +static int pnp_device_probe(struct device *dev) +{ + int error; + struct pnp_driver *pnp_drv; + struct pnp_dev *pnp_dev; + const struct pnp_device_id *dev_id = NULL; + pnp_dev = to_pnp_dev(dev); + pnp_drv = to_pnp_driver(dev->driver); + + error = pnp_device_attach(pnp_dev); + if (error < 0) + return error; + + if (pnp_dev->active == 0) { + if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) { + error = pnp_activate_dev(pnp_dev); + if (error < 0) + return error; + } + } else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE) + == PNP_DRIVER_RES_DISABLE) { + error = pnp_disable_dev(pnp_dev); + if (error < 0) + return error; + } + error = 0; + if (pnp_drv->probe) { + dev_id = match_device(pnp_drv, pnp_dev); + if (dev_id != NULL) + error = pnp_drv->probe(pnp_dev, dev_id); + } + if (error >= 0) { + pnp_dev->driver = pnp_drv; + error = 0; + } else + goto fail; + + return error; + +fail: + pnp_device_detach(pnp_dev); + return error; +} + +static void pnp_device_remove(struct device *dev) +{ + struct pnp_dev *pnp_dev = to_pnp_dev(dev); + struct pnp_driver *drv = pnp_dev->driver; + + if (drv) { + if (drv->remove) + drv->remove(pnp_dev); + pnp_dev->driver = NULL; + } + + if (pnp_dev->active && + (!drv || !(drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE))) + pnp_disable_dev(pnp_dev); + + pnp_device_detach(pnp_dev); +} + +static void pnp_device_shutdown(struct device *dev) +{ + struct pnp_dev *pnp_dev = to_pnp_dev(dev); + struct pnp_driver *drv = pnp_dev->driver; + + if (drv && drv->shutdown) + drv->shutdown(pnp_dev); +} + +static int pnp_bus_match(struct device *dev, struct device_driver *drv) +{ + struct pnp_dev *pnp_dev = to_pnp_dev(dev); + struct pnp_driver *pnp_drv = to_pnp_driver(drv); + + if (match_device(pnp_drv, pnp_dev) == NULL) + return 0; + return 1; +} + +static int __pnp_bus_suspend(struct device *dev, pm_message_t state) +{ + struct pnp_dev *pnp_dev = to_pnp_dev(dev); + struct pnp_driver *pnp_drv = pnp_dev->driver; + int error; + + if (!pnp_drv) + return 0; + + if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) { + error = pnp_drv->driver.pm->suspend(dev); + suspend_report_result(dev, pnp_drv->driver.pm->suspend, error); + if (error) + return error; + } + + if (pnp_drv->suspend) { + error = pnp_drv->suspend(pnp_dev, state); + if (error) + return error; + } + + /* can_write is necessary to be able to re-start the device on resume */ + if (pnp_can_disable(pnp_dev) && pnp_can_write(pnp_dev)) { + error = pnp_stop_dev(pnp_dev); + if (error) + return error; + } + + if (pnp_can_suspend(pnp_dev)) + pnp_dev->protocol->suspend(pnp_dev, state); + return 0; +} + +static int pnp_bus_suspend(struct device *dev) +{ + return __pnp_bus_suspend(dev, PMSG_SUSPEND); +} + +static int pnp_bus_freeze(struct device *dev) +{ + return __pnp_bus_suspend(dev, PMSG_FREEZE); +} + +static int pnp_bus_poweroff(struct device *dev) +{ + return __pnp_bus_suspend(dev, PMSG_HIBERNATE); +} + +static int pnp_bus_resume(struct device *dev) +{ + struct pnp_dev *pnp_dev = to_pnp_dev(dev); + struct pnp_driver *pnp_drv = pnp_dev->driver; + int error; + + if (!pnp_drv) + return 0; + + if (pnp_dev->protocol->resume) { + error = pnp_dev->protocol->resume(pnp_dev); + if (error) + return error; + } + + if (pnp_can_write(pnp_dev)) { + error = pnp_start_dev(pnp_dev); + if (error) + return error; + } + + if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) { + error = pnp_drv->driver.pm->resume(dev); + if (error) + return error; + } + + if (pnp_drv->resume) { + error = pnp_drv->resume(pnp_dev); + if (error) + return error; + } + + return 0; +} + +static const struct dev_pm_ops pnp_bus_dev_pm_ops = { + /* Suspend callbacks */ + .suspend = pnp_bus_suspend, + .resume = pnp_bus_resume, + /* Hibernate callbacks */ + .freeze = pnp_bus_freeze, + .thaw = pnp_bus_resume, + .poweroff = pnp_bus_poweroff, + .restore = pnp_bus_resume, +}; + +struct bus_type pnp_bus_type = { + .name = "pnp", + .match = pnp_bus_match, + .probe = pnp_device_probe, + .remove = pnp_device_remove, + .shutdown = pnp_device_shutdown, + .pm = &pnp_bus_dev_pm_ops, + .dev_groups = pnp_dev_groups, +}; + +int pnp_register_driver(struct pnp_driver *drv) +{ + drv->driver.name = drv->name; + drv->driver.bus = &pnp_bus_type; + + return driver_register(&drv->driver); +} +EXPORT_SYMBOL(pnp_register_driver); + +void pnp_unregister_driver(struct pnp_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL(pnp_unregister_driver); + +/** + * pnp_add_id - adds an EISA id to the specified device + * @dev: pointer to the desired device + * @id: pointer to an EISA id string + */ +struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id) +{ + struct pnp_id *dev_id, *ptr; + + dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); + if (!dev_id) + return NULL; + + dev_id->id[0] = id[0]; + dev_id->id[1] = id[1]; + dev_id->id[2] = id[2]; + dev_id->id[3] = tolower(id[3]); + dev_id->id[4] = tolower(id[4]); + dev_id->id[5] = tolower(id[5]); + dev_id->id[6] = tolower(id[6]); + dev_id->id[7] = '\0'; + + dev_id->next = NULL; + ptr = dev->id; + while (ptr && ptr->next) + ptr = ptr->next; + if (ptr) + ptr->next = dev_id; + else + dev->id = dev_id; + + return dev_id; +} diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c new file mode 100644 index 0000000000..44efcdb87e --- /dev/null +++ b/drivers/pnp/interface.c @@ -0,0 +1,470 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * interface.c - contains everything related to the user interface + * + * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz> + * Copyright 2002 Adam Belay <ambx1@neo.rr.com> + * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ + +#include <linux/pnp.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/list.h> +#include <linux/types.h> +#include <linux/stat.h> +#include <linux/ctype.h> +#include <linux/slab.h> +#include <linux/mutex.h> + +#include <linux/uaccess.h> + +#include "base.h" + +struct pnp_info_buffer { + char *buffer; /* pointer to begin of buffer */ + char *curr; /* current position in buffer */ + unsigned long size; /* current size */ + unsigned long len; /* total length of buffer */ + int stop; /* stop flag */ + int error; /* error code */ +}; + +typedef struct pnp_info_buffer pnp_info_buffer_t; + +__printf(2, 3) +static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...) +{ + va_list args; + int res; + + if (buffer->stop || buffer->error) + return 0; + va_start(args, fmt); + res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args); + va_end(args); + if (buffer->size + res >= buffer->len) { + buffer->stop = 1; + return 0; + } + buffer->curr += res; + buffer->size += res; + return res; +} + +static void pnp_print_port(pnp_info_buffer_t * buffer, char *space, + struct pnp_port *port) +{ + pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, " + "%i-bit address decoding\n", space, + (unsigned long long) port->min, + (unsigned long long) port->max, + port->align ? ((unsigned long long) port->align - 1) : 0, + (unsigned long long) port->size, + port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10); +} + +static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space, + struct pnp_irq *irq) +{ + int first = 1, i; + + pnp_printf(buffer, "%sirq ", space); + for (i = 0; i < PNP_IRQ_NR; i++) + if (test_bit(i, irq->map.bits)) { + if (!first) { + pnp_printf(buffer, ","); + } else { + first = 0; + } + if (i == 2 || i == 9) + pnp_printf(buffer, "2/9"); + else + pnp_printf(buffer, "%i", i); + } + if (bitmap_empty(irq->map.bits, PNP_IRQ_NR)) + pnp_printf(buffer, "<none>"); + if (irq->flags & IORESOURCE_IRQ_HIGHEDGE) + pnp_printf(buffer, " High-Edge"); + if (irq->flags & IORESOURCE_IRQ_LOWEDGE) + pnp_printf(buffer, " Low-Edge"); + if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL) + pnp_printf(buffer, " High-Level"); + if (irq->flags & IORESOURCE_IRQ_LOWLEVEL) + pnp_printf(buffer, " Low-Level"); + if (irq->flags & IORESOURCE_IRQ_OPTIONAL) + pnp_printf(buffer, " (optional)"); + pnp_printf(buffer, "\n"); +} + +static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space, + struct pnp_dma *dma) +{ + int first = 1, i; + char *s; + + pnp_printf(buffer, "%sdma ", space); + for (i = 0; i < 8; i++) + if (dma->map & (1 << i)) { + if (!first) { + pnp_printf(buffer, ","); + } else { + first = 0; + } + pnp_printf(buffer, "%i", i); + } + if (!dma->map) + pnp_printf(buffer, "<none>"); + switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) { + case IORESOURCE_DMA_8BIT: + s = "8-bit"; + break; + case IORESOURCE_DMA_8AND16BIT: + s = "8-bit&16-bit"; + break; + default: + s = "16-bit"; + } + pnp_printf(buffer, " %s", s); + if (dma->flags & IORESOURCE_DMA_MASTER) + pnp_printf(buffer, " master"); + if (dma->flags & IORESOURCE_DMA_BYTE) + pnp_printf(buffer, " byte-count"); + if (dma->flags & IORESOURCE_DMA_WORD) + pnp_printf(buffer, " word-count"); + switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) { + case IORESOURCE_DMA_TYPEA: + s = "type-A"; + break; + case IORESOURCE_DMA_TYPEB: + s = "type-B"; + break; + case IORESOURCE_DMA_TYPEF: + s = "type-F"; + break; + default: + s = "compatible"; + break; + } + pnp_printf(buffer, " %s\n", s); +} + +static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space, + struct pnp_mem *mem) +{ + char *s; + + pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx", + space, (unsigned long long) mem->min, + (unsigned long long) mem->max, + (unsigned long long) mem->align, + (unsigned long long) mem->size); + if (mem->flags & IORESOURCE_MEM_WRITEABLE) + pnp_printf(buffer, ", writeable"); + if (mem->flags & IORESOURCE_MEM_CACHEABLE) + pnp_printf(buffer, ", cacheable"); + if (mem->flags & IORESOURCE_MEM_RANGELENGTH) + pnp_printf(buffer, ", range-length"); + if (mem->flags & IORESOURCE_MEM_SHADOWABLE) + pnp_printf(buffer, ", shadowable"); + if (mem->flags & IORESOURCE_MEM_EXPANSIONROM) + pnp_printf(buffer, ", expansion ROM"); + switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) { + case IORESOURCE_MEM_8BIT: + s = "8-bit"; + break; + case IORESOURCE_MEM_8AND16BIT: + s = "8-bit&16-bit"; + break; + case IORESOURCE_MEM_32BIT: + s = "32-bit"; + break; + default: + s = "16-bit"; + } + pnp_printf(buffer, ", %s\n", s); +} + +static void pnp_print_option(pnp_info_buffer_t * buffer, char *space, + struct pnp_option *option) +{ + switch (option->type) { + case IORESOURCE_IO: + pnp_print_port(buffer, space, &option->u.port); + break; + case IORESOURCE_MEM: + pnp_print_mem(buffer, space, &option->u.mem); + break; + case IORESOURCE_IRQ: + pnp_print_irq(buffer, space, &option->u.irq); + break; + case IORESOURCE_DMA: + pnp_print_dma(buffer, space, &option->u.dma); + break; + } +} + +static ssize_t options_show(struct device *dmdev, struct device_attribute *attr, + char *buf) +{ + struct pnp_dev *dev = to_pnp_dev(dmdev); + pnp_info_buffer_t *buffer; + struct pnp_option *option; + int ret, dep = 0, set = 0; + char *indent; + + buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + buffer->len = PAGE_SIZE; + buffer->buffer = buf; + buffer->curr = buffer->buffer; + + list_for_each_entry(option, &dev->options, list) { + if (pnp_option_is_dependent(option)) { + indent = " "; + if (!dep || pnp_option_set(option) != set) { + set = pnp_option_set(option); + dep = 1; + pnp_printf(buffer, "Dependent: %02i - " + "Priority %s\n", set, + pnp_option_priority_name(option)); + } + } else { + dep = 0; + indent = ""; + } + pnp_print_option(buffer, indent, option); + } + + ret = (buffer->curr - buf); + kfree(buffer); + return ret; +} +static DEVICE_ATTR_RO(options); + +static ssize_t resources_show(struct device *dmdev, + struct device_attribute *attr, char *buf) +{ + struct pnp_dev *dev = to_pnp_dev(dmdev); + pnp_info_buffer_t *buffer; + struct pnp_resource *pnp_res; + struct resource *res; + int ret; + + if (!dev) + return -EINVAL; + + buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + buffer->len = PAGE_SIZE; + buffer->buffer = buf; + buffer->curr = buffer->buffer; + + pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled"); + + list_for_each_entry(pnp_res, &dev->resources, list) { + res = &pnp_res->res; + + pnp_printf(buffer, pnp_resource_type_name(res)); + + if (res->flags & IORESOURCE_DISABLED) { + pnp_printf(buffer, " disabled\n"); + continue; + } + + switch (pnp_resource_type(res)) { + case IORESOURCE_IO: + case IORESOURCE_MEM: + case IORESOURCE_BUS: + pnp_printf(buffer, " %#llx-%#llx%s\n", + (unsigned long long) res->start, + (unsigned long long) res->end, + res->flags & IORESOURCE_WINDOW ? + " window" : ""); + break; + case IORESOURCE_IRQ: + case IORESOURCE_DMA: + pnp_printf(buffer, " %lld\n", + (unsigned long long) res->start); + break; + } + } + + ret = (buffer->curr - buf); + kfree(buffer); + return ret; +} + +static char *pnp_get_resource_value(char *buf, + unsigned long type, + resource_size_t *start, + resource_size_t *end, + unsigned long *flags) +{ + if (start) + *start = 0; + if (end) + *end = 0; + if (flags) + *flags = 0; + + /* TBD: allow for disabled resources */ + + buf = skip_spaces(buf); + if (start) { + *start = simple_strtoull(buf, &buf, 0); + if (end) { + buf = skip_spaces(buf); + if (*buf == '-') { + buf = skip_spaces(buf + 1); + *end = simple_strtoull(buf, &buf, 0); + } else + *end = *start; + } + } + + /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */ + + return buf; +} + +static ssize_t resources_store(struct device *dmdev, + struct device_attribute *attr, const char *ubuf, + size_t count) +{ + struct pnp_dev *dev = to_pnp_dev(dmdev); + char *buf = (void *)ubuf; + int retval = 0; + + if (dev->status & PNP_ATTACHED) { + retval = -EBUSY; + dev_info(&dev->dev, "in use; can't configure\n"); + goto done; + } + + buf = skip_spaces(buf); + if (!strncasecmp(buf, "disable", 7)) { + retval = pnp_disable_dev(dev); + goto done; + } + if (!strncasecmp(buf, "activate", 8)) { + retval = pnp_activate_dev(dev); + goto done; + } + if (!strncasecmp(buf, "fill", 4)) { + if (dev->active) + goto done; + retval = pnp_auto_config_dev(dev); + goto done; + } + if (!strncasecmp(buf, "auto", 4)) { + if (dev->active) + goto done; + pnp_init_resources(dev); + retval = pnp_auto_config_dev(dev); + goto done; + } + if (!strncasecmp(buf, "clear", 5)) { + if (dev->active) + goto done; + pnp_init_resources(dev); + goto done; + } + if (!strncasecmp(buf, "get", 3)) { + mutex_lock(&pnp_res_mutex); + if (pnp_can_read(dev)) + dev->protocol->get(dev); + mutex_unlock(&pnp_res_mutex); + goto done; + } + if (!strncasecmp(buf, "set", 3)) { + resource_size_t start; + resource_size_t end; + unsigned long flags; + + if (dev->active) + goto done; + buf += 3; + pnp_init_resources(dev); + mutex_lock(&pnp_res_mutex); + while (1) { + buf = skip_spaces(buf); + if (!strncasecmp(buf, "io", 2)) { + buf = pnp_get_resource_value(buf + 2, + IORESOURCE_IO, + &start, &end, + &flags); + pnp_add_io_resource(dev, start, end, flags); + } else if (!strncasecmp(buf, "mem", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_MEM, + &start, &end, + &flags); + pnp_add_mem_resource(dev, start, end, flags); + } else if (!strncasecmp(buf, "irq", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_IRQ, + &start, NULL, + &flags); + pnp_add_irq_resource(dev, start, flags); + } else if (!strncasecmp(buf, "dma", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_DMA, + &start, NULL, + &flags); + pnp_add_dma_resource(dev, start, flags); + } else if (!strncasecmp(buf, "bus", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_BUS, + &start, &end, + NULL); + pnp_add_bus_resource(dev, start, end); + } else + break; + } + mutex_unlock(&pnp_res_mutex); + goto done; + } + +done: + if (retval < 0) + return retval; + return count; +} +static DEVICE_ATTR_RW(resources); + +static ssize_t id_show(struct device *dmdev, struct device_attribute *attr, + char *buf) +{ + char *str = buf; + struct pnp_dev *dev = to_pnp_dev(dmdev); + struct pnp_id *pos = dev->id; + + while (pos) { + str += sprintf(str, "%s\n", pos->id); + pos = pos->next; + } + return (str - buf); +} +static DEVICE_ATTR_RO(id); + +static struct attribute *pnp_dev_attrs[] = { + &dev_attr_resources.attr, + &dev_attr_options.attr, + &dev_attr_id.attr, + NULL, +}; + +static const struct attribute_group pnp_dev_group = { + .attrs = pnp_dev_attrs, +}; + +const struct attribute_group *pnp_dev_groups[] = { + &pnp_dev_group, + NULL, +}; diff --git a/drivers/pnp/isapnp/Kconfig b/drivers/pnp/isapnp/Kconfig new file mode 100644 index 0000000000..d0479a5631 --- /dev/null +++ b/drivers/pnp/isapnp/Kconfig @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# ISA Plug and Play configuration +# +config ISAPNP + bool "ISA Plug and Play support" + depends on ISA || COMPILE_TEST + help + Say Y here if you would like support for ISA Plug and Play devices. + Some information is in <file:Documentation/driver-api/isapnp.rst>. + + If unsure, say Y. diff --git a/drivers/pnp/isapnp/Makefile b/drivers/pnp/isapnp/Makefile new file mode 100644 index 0000000000..a0e0c0aecc --- /dev/null +++ b/drivers/pnp/isapnp/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the kernel ISAPNP driver. +# +obj-y += pnp.o +pnp-y := core.o compat.o + +pnp-$(CONFIG_PROC_FS) += proc.o diff --git a/drivers/pnp/isapnp/compat.c b/drivers/pnp/isapnp/compat.c new file mode 100644 index 0000000000..d60d9e377d --- /dev/null +++ b/drivers/pnp/isapnp/compat.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * compat.c - A series of functions to make it easier to convert drivers that use + * the old isapnp APIs. If possible use the new APIs instead. + * + * Copyright 2002 Adam Belay <ambx1@neo.rr.com> + */ + +#include <linux/module.h> +#include <linux/isapnp.h> +#include <linux/string.h> + +static void pnp_convert_id(char *buf, unsigned short vendor, + unsigned short device) +{ + sprintf(buf, "%c%c%c%x%x%x%x", + 'A' + ((vendor >> 2) & 0x3f) - 1, + 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, + 'A' + ((vendor >> 8) & 0x1f) - 1, + (device >> 4) & 0x0f, device & 0x0f, + (device >> 12) & 0x0f, (device >> 8) & 0x0f); +} + +struct pnp_dev *pnp_find_dev(struct pnp_card *card, unsigned short vendor, + unsigned short function, struct pnp_dev *from) +{ + char id[8]; + char any[8]; + + pnp_convert_id(id, vendor, function); + pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID); + if (card == NULL) { /* look for a logical device from all cards */ + struct list_head *list; + + list = pnp_global.next; + if (from) + list = from->global_list.next; + + while (list != &pnp_global) { + struct pnp_dev *dev = global_to_pnp_dev(list); + + if (compare_pnp_id(dev->id, id) || + (memcmp(id, any, 7) == 0)) + return dev; + list = list->next; + } + } else { + struct list_head *list; + + list = card->devices.next; + if (from) { + list = from->card_list.next; + if (from->card != card) /* something is wrong */ + return NULL; + } + while (list != &card->devices) { + struct pnp_dev *dev = card_to_pnp_dev(list); + + if (compare_pnp_id(dev->id, id)) + return dev; + list = list->next; + } + } + return NULL; +} +EXPORT_SYMBOL(pnp_find_dev); diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c new file mode 100644 index 0000000000..c43d8ad025 --- /dev/null +++ b/drivers/pnp/isapnp/core.c @@ -0,0 +1,1069 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * ISA Plug & Play support + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * + * Changelog: + * 2000-01-01 Added quirks handling for buggy hardware + * Peter Denison <peterd@pnd-pc.demon.co.uk> + * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev() + * Christoph Hellwig <hch@infradead.org> + * 2001-06-03 Added release_region calls to correspond with + * request_region calls when a failure occurs. Also + * added KERN_* constants to printk() calls. + * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines + * of the pci driver interface + * Kai Germaschewski <kai.germaschewski@gmx.de> + * 2002-06-06 Made the use of dma channel 0 configurable + * Gerald Teschl <gerald.teschl@univie.ac.at> + * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com> + * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com> + */ + +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/isapnp.h> +#include <linux/mutex.h> +#include <asm/io.h> + +#include "../base.h" + +#if 0 +#define ISAPNP_REGION_OK +#endif + +int isapnp_disable; /* Disable ISA PnP */ +static int isapnp_rdp; /* Read Data Port */ +static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ +static int isapnp_verbose = 1; /* verbose mode */ + +module_param(isapnp_disable, int, 0); +MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); +module_param(isapnp_rdp, int, 0); +MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); +module_param(isapnp_reset, int, 0); +MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); +module_param(isapnp_verbose, int, 0); +MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); + +#define _PIDXR 0x279 +#define _PNPWRP 0xa79 + +/* short tags */ +#define _STAG_PNPVERNO 0x01 +#define _STAG_LOGDEVID 0x02 +#define _STAG_COMPATDEVID 0x03 +#define _STAG_IRQ 0x04 +#define _STAG_DMA 0x05 +#define _STAG_STARTDEP 0x06 +#define _STAG_ENDDEP 0x07 +#define _STAG_IOPORT 0x08 +#define _STAG_FIXEDIO 0x09 +#define _STAG_VENDOR 0x0e +#define _STAG_END 0x0f +/* long tags */ +#define _LTAG_MEMRANGE 0x81 +#define _LTAG_ANSISTR 0x82 +#define _LTAG_UNICODESTR 0x83 +#define _LTAG_VENDOR 0x84 +#define _LTAG_MEM32RANGE 0x85 +#define _LTAG_FIXEDMEM32RANGE 0x86 + +/* Logical device control and configuration registers */ + +#define ISAPNP_CFG_ACTIVATE 0x30 /* byte */ +#define ISAPNP_CFG_MEM 0x40 /* 4 * dword */ +#define ISAPNP_CFG_PORT 0x60 /* 8 * word */ +#define ISAPNP_CFG_IRQ 0x70 /* 2 * word */ +#define ISAPNP_CFG_DMA 0x74 /* 2 * byte */ + +/* + * Sizes of ISAPNP logical device configuration register sets. + * See PNP-ISA-v1.0a.pdf, Appendix A. + */ +#define ISAPNP_MAX_MEM 4 +#define ISAPNP_MAX_PORT 8 +#define ISAPNP_MAX_IRQ 2 +#define ISAPNP_MAX_DMA 2 + +static unsigned char isapnp_checksum_value; +static DEFINE_MUTEX(isapnp_cfg_mutex); +static int isapnp_csn_count; + +/* some prototypes */ + +static inline void write_data(unsigned char x) +{ + outb(x, _PNPWRP); +} + +static inline void write_address(unsigned char x) +{ + outb(x, _PIDXR); + udelay(20); +} + +static inline unsigned char read_data(void) +{ + unsigned char val = inb(isapnp_rdp); + return val; +} + +unsigned char isapnp_read_byte(unsigned char idx) +{ + write_address(idx); + return read_data(); +} + +static unsigned short isapnp_read_word(unsigned char idx) +{ + unsigned short val; + + val = isapnp_read_byte(idx); + val = (val << 8) + isapnp_read_byte(idx + 1); + return val; +} + +void isapnp_write_byte(unsigned char idx, unsigned char val) +{ + write_address(idx); + write_data(val); +} + +static void isapnp_write_word(unsigned char idx, unsigned short val) +{ + isapnp_write_byte(idx, val >> 8); + isapnp_write_byte(idx + 1, val); +} + +static void isapnp_key(void) +{ + unsigned char code = 0x6a, msb; + int i; + + mdelay(1); + write_address(0x00); + write_address(0x00); + + write_address(code); + + for (i = 1; i < 32; i++) { + msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; + code = (code >> 1) | msb; + write_address(code); + } +} + +/* place all pnp cards in wait-for-key state */ +static void isapnp_wait(void) +{ + isapnp_write_byte(0x02, 0x02); +} + +static void isapnp_wake(unsigned char csn) +{ + isapnp_write_byte(0x03, csn); +} + +static void isapnp_device(unsigned char logdev) +{ + isapnp_write_byte(0x07, logdev); +} + +static void isapnp_activate(unsigned char logdev) +{ + isapnp_device(logdev); + isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); + udelay(250); +} + +static void isapnp_deactivate(unsigned char logdev) +{ + isapnp_device(logdev); + isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); + udelay(500); +} + +static void __init isapnp_peek(unsigned char *data, int bytes) +{ + int i, j; + unsigned char d = 0; + + for (i = 1; i <= bytes; i++) { + for (j = 0; j < 20; j++) { + d = isapnp_read_byte(0x05); + if (d & 1) + break; + udelay(100); + } + if (!(d & 1)) { + if (data != NULL) + *data++ = 0xff; + continue; + } + d = isapnp_read_byte(0x04); /* PRESDI */ + isapnp_checksum_value += d; + if (data != NULL) + *data++ = d; + } +} + +#define RDP_STEP 32 /* minimum is 4 */ + +static int isapnp_next_rdp(void) +{ + int rdp = isapnp_rdp; + static int old_rdp = 0; + + if (old_rdp) { + release_region(old_rdp, 1); + old_rdp = 0; + } + while (rdp <= 0x3ff) { + /* + * We cannot use NE2000 probe spaces for ISAPnP or we + * will lock up machines. + */ + if ((rdp < 0x280 || rdp > 0x380) + && request_region(rdp, 1, "ISAPnP")) { + isapnp_rdp = rdp; + old_rdp = rdp; + return 0; + } + rdp += RDP_STEP; + } + return -1; +} + +/* Set read port address */ +static inline void isapnp_set_rdp(void) +{ + isapnp_write_byte(0x00, isapnp_rdp >> 2); + udelay(100); +} + +/* + * Perform an isolation. The port selection code now tries to avoid + * "dangerous to read" ports. + */ +static int __init isapnp_isolate_rdp_select(void) +{ + isapnp_wait(); + isapnp_key(); + + /* Control: reset CSN and conditionally everything else too */ + isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); + mdelay(2); + + isapnp_wait(); + isapnp_key(); + isapnp_wake(0x00); + + if (isapnp_next_rdp() < 0) { + isapnp_wait(); + return -1; + } + + isapnp_set_rdp(); + udelay(1000); + write_address(0x01); + udelay(1000); + return 0; +} + +/* + * Isolate (assign uniqued CSN) to all ISA PnP devices. + */ +static int __init isapnp_isolate(void) +{ + unsigned char checksum = 0x6a; + unsigned char chksum = 0x00; + unsigned char bit = 0x00; + int data; + int csn = 0; + int i; + int iteration = 1; + + isapnp_rdp = 0x213; + if (isapnp_isolate_rdp_select() < 0) + return -1; + + while (1) { + for (i = 1; i <= 64; i++) { + data = read_data() << 8; + udelay(250); + data = data | read_data(); + udelay(250); + if (data == 0x55aa) + bit = 0x01; + checksum = + ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) + | (checksum >> 1); + bit = 0x00; + } + for (i = 65; i <= 72; i++) { + data = read_data() << 8; + udelay(250); + data = data | read_data(); + udelay(250); + if (data == 0x55aa) + chksum |= (1 << (i - 65)); + } + if (checksum != 0x00 && checksum == chksum) { + csn++; + + isapnp_write_byte(0x06, csn); + udelay(250); + iteration++; + isapnp_wake(0x00); + isapnp_set_rdp(); + udelay(1000); + write_address(0x01); + udelay(1000); + goto __next; + } + if (iteration == 1) { + isapnp_rdp += RDP_STEP; + if (isapnp_isolate_rdp_select() < 0) + return -1; + } else if (iteration > 1) { + break; + } +__next: + if (csn == 255) + break; + checksum = 0x6a; + chksum = 0x00; + bit = 0x00; + } + isapnp_wait(); + isapnp_csn_count = csn; + return csn; +} + +/* + * Read one tag from stream. + */ +static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) +{ + unsigned char tag, tmp[2]; + + isapnp_peek(&tag, 1); + if (tag == 0) /* invalid tag */ + return -1; + if (tag & 0x80) { /* large item */ + *type = tag; + isapnp_peek(tmp, 2); + *size = (tmp[1] << 8) | tmp[0]; + } else { + *type = (tag >> 3) & 0x0f; + *size = tag & 0x07; + } + if (*type == 0xff && *size == 0xffff) /* probably invalid data */ + return -1; + return 0; +} + +/* + * Skip specified number of bytes from stream. + */ +static void __init isapnp_skip_bytes(int count) +{ + isapnp_peek(NULL, count); +} + +/* + * Parse logical device tag. + */ +static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card, + int size, int number) +{ + unsigned char tmp[6]; + struct pnp_dev *dev; + u32 eisa_id; + char id[8]; + + isapnp_peek(tmp, size); + eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24; + pnp_eisa_id_to_string(eisa_id, id); + + dev = pnp_alloc_dev(&isapnp_protocol, number, id); + if (!dev) + return NULL; + + dev->card = card; + dev->capabilities |= PNP_CONFIGURABLE; + dev->capabilities |= PNP_READ; + dev->capabilities |= PNP_WRITE; + dev->capabilities |= PNP_DISABLE; + pnp_init_resources(dev); + return dev; +} + +/* + * Add IRQ resource to resources list. + */ +static void __init isapnp_parse_irq_resource(struct pnp_dev *dev, + unsigned int option_flags, + int size) +{ + unsigned char tmp[3]; + unsigned long bits; + pnp_irq_mask_t map; + unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; + + isapnp_peek(tmp, size); + bits = (tmp[1] << 8) | tmp[0]; + + bitmap_zero(map.bits, PNP_IRQ_NR); + bitmap_copy(map.bits, &bits, 16); + + if (size > 2) + flags = tmp[2]; + + pnp_register_irq_resource(dev, option_flags, &map, flags); +} + +/* + * Add DMA resource to resources list. + */ +static void __init isapnp_parse_dma_resource(struct pnp_dev *dev, + unsigned int option_flags, + int size) +{ + unsigned char tmp[2]; + + isapnp_peek(tmp, size); + pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]); +} + +/* + * Add port resource to resources list. + */ +static void __init isapnp_parse_port_resource(struct pnp_dev *dev, + unsigned int option_flags, + int size) +{ + unsigned char tmp[7]; + resource_size_t min, max, align, len; + unsigned char flags; + + isapnp_peek(tmp, size); + min = (tmp[2] << 8) | tmp[1]; + max = (tmp[4] << 8) | tmp[3]; + align = tmp[5]; + len = tmp[6]; + flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0; + pnp_register_port_resource(dev, option_flags, + min, max, align, len, flags); +} + +/* + * Add fixed port resource to resources list. + */ +static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev, + unsigned int option_flags, + int size) +{ + unsigned char tmp[3]; + resource_size_t base, len; + + isapnp_peek(tmp, size); + base = (tmp[1] << 8) | tmp[0]; + len = tmp[2]; + pnp_register_port_resource(dev, option_flags, base, base, 0, len, + IORESOURCE_IO_FIXED); +} + +/* + * Add memory resource to resources list. + */ +static void __init isapnp_parse_mem_resource(struct pnp_dev *dev, + unsigned int option_flags, + int size) +{ + unsigned char tmp[9]; + resource_size_t min, max, align, len; + unsigned char flags; + + isapnp_peek(tmp, size); + min = ((tmp[2] << 8) | tmp[1]) << 8; + max = ((tmp[4] << 8) | tmp[3]) << 8; + align = (tmp[6] << 8) | tmp[5]; + len = ((tmp[8] << 8) | tmp[7]) << 8; + flags = tmp[0]; + pnp_register_mem_resource(dev, option_flags, + min, max, align, len, flags); +} + +/* + * Add 32-bit memory resource to resources list. + */ +static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev, + unsigned int option_flags, + int size) +{ + unsigned char tmp[17]; + resource_size_t min, max, align, len; + unsigned char flags; + + isapnp_peek(tmp, size); + min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; + max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; + align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; + len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; + flags = tmp[0]; + pnp_register_mem_resource(dev, option_flags, + min, max, align, len, flags); +} + +/* + * Add 32-bit fixed memory resource to resources list. + */ +static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev, + unsigned int option_flags, + int size) +{ + unsigned char tmp[9]; + resource_size_t base, len; + unsigned char flags; + + isapnp_peek(tmp, size); + base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; + len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; + flags = tmp[0]; + pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); +} + +/* + * Parse card name for ISA PnP device. + */ +static void __init +isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) +{ + if (name[0] == '\0') { + unsigned short size1 = + *size >= name_max ? (name_max - 1) : *size; + isapnp_peek(name, size1); + name[size1] = '\0'; + *size -= size1; + + /* clean whitespace from end of string */ + while (size1 > 0 && name[--size1] == ' ') + name[size1] = '\0'; + } +} + +/* + * Parse resource map for logical device. + */ +static int __init isapnp_create_device(struct pnp_card *card, + unsigned short size) +{ + int number = 0, skip = 0, priority, compat = 0; + unsigned char type, tmp[17]; + unsigned int option_flags; + struct pnp_dev *dev; + u32 eisa_id; + char id[8]; + + if ((dev = isapnp_parse_device(card, size, number++)) == NULL) + return 1; + option_flags = 0; + pnp_add_card_device(card, dev); + + while (1) { + if (isapnp_read_tag(&type, &size) < 0) + return 1; + if (skip && type != _STAG_LOGDEVID && type != _STAG_END) + goto __skip; + switch (type) { + case _STAG_LOGDEVID: + if (size >= 5 && size <= 6) { + if ((dev = + isapnp_parse_device(card, size, + number++)) == NULL) + return 1; + size = 0; + skip = 0; + option_flags = 0; + pnp_add_card_device(card, dev); + } else { + skip = 1; + } + compat = 0; + break; + case _STAG_COMPATDEVID: + if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { + isapnp_peek(tmp, 4); + eisa_id = tmp[0] | tmp[1] << 8 | + tmp[2] << 16 | tmp[3] << 24; + pnp_eisa_id_to_string(eisa_id, id); + pnp_add_id(dev, id); + compat++; + size = 0; + } + break; + case _STAG_IRQ: + if (size < 2 || size > 3) + goto __skip; + isapnp_parse_irq_resource(dev, option_flags, size); + size = 0; + break; + case _STAG_DMA: + if (size != 2) + goto __skip; + isapnp_parse_dma_resource(dev, option_flags, size); + size = 0; + break; + case _STAG_STARTDEP: + if (size > 1) + goto __skip; + priority = PNP_RES_PRIORITY_ACCEPTABLE; + if (size > 0) { + isapnp_peek(tmp, size); + priority = tmp[0]; + size = 0; + } + option_flags = pnp_new_dependent_set(dev, priority); + break; + case _STAG_ENDDEP: + if (size != 0) + goto __skip; + option_flags = 0; + break; + case _STAG_IOPORT: + if (size != 7) + goto __skip; + isapnp_parse_port_resource(dev, option_flags, size); + size = 0; + break; + case _STAG_FIXEDIO: + if (size != 3) + goto __skip; + isapnp_parse_fixed_port_resource(dev, option_flags, + size); + size = 0; + break; + case _STAG_VENDOR: + break; + case _LTAG_MEMRANGE: + if (size != 9) + goto __skip; + isapnp_parse_mem_resource(dev, option_flags, size); + size = 0; + break; + case _LTAG_ANSISTR: + isapnp_parse_name(dev->name, sizeof(dev->name), &size); + break; + case _LTAG_UNICODESTR: + /* silently ignore */ + /* who use unicode for hardware identification? */ + break; + case _LTAG_VENDOR: + break; + case _LTAG_MEM32RANGE: + if (size != 17) + goto __skip; + isapnp_parse_mem32_resource(dev, option_flags, size); + size = 0; + break; + case _LTAG_FIXEDMEM32RANGE: + if (size != 9) + goto __skip; + isapnp_parse_fixed_mem32_resource(dev, option_flags, + size); + size = 0; + break; + case _STAG_END: + if (size > 0) + isapnp_skip_bytes(size); + return 1; + default: + dev_err(&dev->dev, "unknown tag %#x (card %i), " + "ignored\n", type, card->number); + } +__skip: + if (size > 0) + isapnp_skip_bytes(size); + } + return 0; +} + +/* + * Parse resource map for ISA PnP card. + */ +static void __init isapnp_parse_resource_map(struct pnp_card *card) +{ + unsigned char type, tmp[17]; + unsigned short size; + + while (1) { + if (isapnp_read_tag(&type, &size) < 0) + return; + switch (type) { + case _STAG_PNPVERNO: + if (size != 2) + goto __skip; + isapnp_peek(tmp, 2); + card->pnpver = tmp[0]; + card->productver = tmp[1]; + size = 0; + break; + case _STAG_LOGDEVID: + if (size >= 5 && size <= 6) { + if (isapnp_create_device(card, size) == 1) + return; + size = 0; + } + break; + case _STAG_VENDOR: + break; + case _LTAG_ANSISTR: + isapnp_parse_name(card->name, sizeof(card->name), + &size); + break; + case _LTAG_UNICODESTR: + /* silently ignore */ + /* who use unicode for hardware identification? */ + break; + case _LTAG_VENDOR: + break; + case _STAG_END: + if (size > 0) + isapnp_skip_bytes(size); + return; + default: + dev_err(&card->dev, "unknown tag %#x, ignored\n", + type); + } +__skip: + if (size > 0) + isapnp_skip_bytes(size); + } +} + +/* + * Build device list for all present ISA PnP devices. + */ +static int __init isapnp_build_device_list(void) +{ + int csn; + unsigned char header[9]; + struct pnp_card *card; + u32 eisa_id; + char id[8]; + + isapnp_wait(); + isapnp_key(); + for (csn = 1; csn <= isapnp_csn_count; csn++) { + isapnp_wake(csn); + isapnp_peek(header, 9); + eisa_id = header[0] | header[1] << 8 | + header[2] << 16 | header[3] << 24; + pnp_eisa_id_to_string(eisa_id, id); + card = pnp_alloc_card(&isapnp_protocol, csn, id); + if (!card) + continue; + + INIT_LIST_HEAD(&card->devices); + card->serial = + (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | + header[4]; + isapnp_checksum_value = 0x00; + isapnp_parse_resource_map(card); + if (isapnp_checksum_value != 0x00) + dev_err(&card->dev, "invalid checksum %#x\n", + isapnp_checksum_value); + card->checksum = isapnp_checksum_value; + + pnp_add_card(card); + } + isapnp_wait(); + return 0; +} + +/* + * Basic configuration routines. + */ + +int isapnp_present(void) +{ + struct pnp_card *card; + + pnp_for_each_card(card) { + if (card->protocol == &isapnp_protocol) + return 1; + } + return 0; +} + +int isapnp_cfg_begin(int csn, int logdev) +{ + if (csn < 1 || csn > isapnp_csn_count || logdev > 10) + return -EINVAL; + mutex_lock(&isapnp_cfg_mutex); + isapnp_wait(); + isapnp_key(); + isapnp_wake(csn); +#if 0 + /* to avoid malfunction when the isapnptools package is used */ + /* we must set RDP to our value again */ + /* it is possible to set RDP only in the isolation phase */ + /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ + isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ + mdelay(2); /* is this necessary? */ + isapnp_wake(csn); /* bring card into sleep state */ + isapnp_wake(0); /* bring card into isolation state */ + isapnp_set_rdp(); /* reset the RDP port */ + udelay(1000); /* delay 1000us */ + isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ + udelay(250); /* is this necessary? */ +#endif + if (logdev >= 0) + isapnp_device(logdev); + return 0; +} + +int isapnp_cfg_end(void) +{ + isapnp_wait(); + mutex_unlock(&isapnp_cfg_mutex); + return 0; +} + +/* + * Initialization. + */ + +EXPORT_SYMBOL(isapnp_protocol); +EXPORT_SYMBOL(isapnp_present); +EXPORT_SYMBOL(isapnp_cfg_begin); +EXPORT_SYMBOL(isapnp_cfg_end); +EXPORT_SYMBOL(isapnp_write_byte); + +static int isapnp_get_resources(struct pnp_dev *dev) +{ + int i, ret; + + pnp_dbg(&dev->dev, "get resources\n"); + pnp_init_resources(dev); + isapnp_cfg_begin(dev->card->number, dev->number); + dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); + if (!dev->active) + goto __end; + + for (i = 0; i < ISAPNP_MAX_PORT; i++) { + ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1)); + pnp_add_io_resource(dev, ret, ret, + ret == 0 ? IORESOURCE_DISABLED : 0); + } + for (i = 0; i < ISAPNP_MAX_MEM; i++) { + ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8; + pnp_add_mem_resource(dev, ret, ret, + ret == 0 ? IORESOURCE_DISABLED : 0); + } + for (i = 0; i < ISAPNP_MAX_IRQ; i++) { + ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8; + pnp_add_irq_resource(dev, ret, + ret == 0 ? IORESOURCE_DISABLED : 0); + } + for (i = 0; i < ISAPNP_MAX_DMA; i++) { + ret = isapnp_read_byte(ISAPNP_CFG_DMA + i); + pnp_add_dma_resource(dev, ret, + ret == 4 ? IORESOURCE_DISABLED : 0); + } + +__end: + isapnp_cfg_end(); + return 0; +} + +static int isapnp_set_resources(struct pnp_dev *dev) +{ + struct resource *res; + int tmp; + + pnp_dbg(&dev->dev, "set resources\n"); + isapnp_cfg_begin(dev->card->number, dev->number); + dev->active = 1; + for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) { + res = pnp_get_resource(dev, IORESOURCE_IO, tmp); + if (pnp_resource_enabled(res)) { + pnp_dbg(&dev->dev, " set io %d to %#llx\n", + tmp, (unsigned long long) res->start); + isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1), + res->start); + } + } + for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) { + res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp); + if (pnp_resource_enabled(res)) { + int irq = res->start; + if (irq == 2) + irq = 9; + pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq); + isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq); + } + } + for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) { + res = pnp_get_resource(dev, IORESOURCE_DMA, tmp); + if (pnp_resource_enabled(res)) { + pnp_dbg(&dev->dev, " set dma %d to %lld\n", + tmp, (unsigned long long) res->start); + isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start); + } + } + for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) { + res = pnp_get_resource(dev, IORESOURCE_MEM, tmp); + if (pnp_resource_enabled(res)) { + pnp_dbg(&dev->dev, " set mem %d to %#llx\n", + tmp, (unsigned long long) res->start); + isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3), + (res->start >> 8) & 0xffff); + } + } + /* FIXME: We aren't handling 32bit mems properly here */ + isapnp_activate(dev->number); + isapnp_cfg_end(); + return 0; +} + +static int isapnp_disable_resources(struct pnp_dev *dev) +{ + if (!dev->active) + return -EINVAL; + isapnp_cfg_begin(dev->card->number, dev->number); + isapnp_deactivate(dev->number); + dev->active = 0; + isapnp_cfg_end(); + return 0; +} + +struct pnp_protocol isapnp_protocol = { + .name = "ISA Plug and Play", + .get = isapnp_get_resources, + .set = isapnp_set_resources, + .disable = isapnp_disable_resources, +}; + +static int __init isapnp_init(void) +{ + int cards; + struct pnp_card *card; + struct pnp_dev *dev; + + if (isapnp_disable) { + printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); + return 0; + } +#ifdef CONFIG_PPC + if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) + return -EINVAL; +#endif +#ifdef ISAPNP_REGION_OK + if (!request_region(_PIDXR, 1, "isapnp index")) { + printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", + _PIDXR); + return -EBUSY; + } +#endif + if (!request_region(_PNPWRP, 1, "isapnp write")) { + printk(KERN_ERR + "isapnp: Write Data Register 0x%x already used\n", + _PNPWRP); +#ifdef ISAPNP_REGION_OK + release_region(_PIDXR, 1); +#endif + return -EBUSY; + } + + if (pnp_register_protocol(&isapnp_protocol) < 0) + return -EBUSY; + + /* + * Print a message. The existing ISAPnP code is hanging machines + * so let the user know where. + */ + + printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); + if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { + isapnp_rdp |= 3; + if (!request_region(isapnp_rdp, 1, "isapnp read")) { + printk(KERN_ERR + "isapnp: Read Data Register 0x%x already used\n", + isapnp_rdp); +#ifdef ISAPNP_REGION_OK + release_region(_PIDXR, 1); +#endif + release_region(_PNPWRP, 1); + return -EBUSY; + } + isapnp_set_rdp(); + } + if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { + cards = isapnp_isolate(); + if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { +#ifdef ISAPNP_REGION_OK + release_region(_PIDXR, 1); +#endif + release_region(_PNPWRP, 1); + printk(KERN_INFO + "isapnp: No Plug & Play device found\n"); + return 0; + } + request_region(isapnp_rdp, 1, "isapnp read"); + } + isapnp_build_device_list(); + cards = 0; + + protocol_for_each_card(&isapnp_protocol, card) { + cards++; + if (isapnp_verbose) { + dev_info(&card->dev, "card '%s'\n", + card->name[0] ? card->name : "unknown"); + if (isapnp_verbose < 2) + continue; + card_for_each_dev(card, dev) { + dev_info(&card->dev, "device '%s'\n", + dev->name[0] ? dev->name : "unknown"); + } + } + } + if (cards) + printk(KERN_INFO + "isapnp: %i Plug & Play card%s detected total\n", cards, + cards > 1 ? "s" : ""); + else + printk(KERN_INFO "isapnp: No Plug & Play card found\n"); + + isapnp_proc_init(); + return 0; +} + +device_initcall(isapnp_init); + +/* format is: noisapnp */ + +static int __init isapnp_setup_disable(char *str) +{ + isapnp_disable = 1; + return 1; +} + +__setup("noisapnp", isapnp_setup_disable); + +/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ + +static int __init isapnp_setup_isapnp(char *str) +{ + (void)((get_option(&str, &isapnp_rdp) == 2) && + (get_option(&str, &isapnp_reset) == 2) && + (get_option(&str, &isapnp_verbose) == 2)); + return 1; +} + +__setup("isapnp=", isapnp_setup_isapnp); diff --git a/drivers/pnp/isapnp/proc.c b/drivers/pnp/isapnp/proc.c new file mode 100644 index 0000000000..55ae72a281 --- /dev/null +++ b/drivers/pnp/isapnp/proc.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * ISA Plug & Play support + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + */ + +#include <linux/module.h> +#include <linux/isapnp.h> +#include <linux/proc_fs.h> +#include <linux/init.h> +#include <linux/uaccess.h> + +extern struct pnp_protocol isapnp_protocol; + +static struct proc_dir_entry *isapnp_proc_bus_dir = NULL; + +static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence) +{ + return fixed_size_llseek(file, off, whence, 256); +} + +static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf, + size_t nbytes, loff_t * ppos) +{ + struct pnp_dev *dev = pde_data(file_inode(file)); + int pos = *ppos; + int cnt, size = 256; + + if (pos >= size) + return 0; + if (nbytes >= size) + nbytes = size; + if (pos + nbytes > size) + nbytes = size - pos; + cnt = nbytes; + + if (!access_ok(buf, cnt)) + return -EINVAL; + + isapnp_cfg_begin(dev->card->number, dev->number); + for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) { + unsigned char val; + val = isapnp_read_byte(pos); + __put_user(val, buf); + } + isapnp_cfg_end(); + + *ppos = pos; + return nbytes; +} + +static const struct proc_ops isapnp_proc_bus_proc_ops = { + .proc_lseek = isapnp_proc_bus_lseek, + .proc_read = isapnp_proc_bus_read, +}; + +static int isapnp_proc_attach_device(struct pnp_dev *dev) +{ + struct pnp_card *bus = dev->card; + char name[16]; + + if (!bus->procdir) { + sprintf(name, "%02x", bus->number); + bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir); + if (!bus->procdir) + return -ENOMEM; + } + sprintf(name, "%02x", dev->number); + dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, bus->procdir, + &isapnp_proc_bus_proc_ops, dev); + if (!dev->procent) + return -ENOMEM; + proc_set_size(dev->procent, 256); + return 0; +} + +int __init isapnp_proc_init(void) +{ + struct pnp_dev *dev; + + isapnp_proc_bus_dir = proc_mkdir("bus/isapnp", NULL); + protocol_for_each_dev(&isapnp_protocol, dev) { + isapnp_proc_attach_device(dev); + } + return 0; +} diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c new file mode 100644 index 0000000000..1765d6e60a --- /dev/null +++ b/drivers/pnp/manager.c @@ -0,0 +1,429 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices + * + * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz> + * Copyright 2003 Adam Belay <ambx1@neo.rr.com> + * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ + +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/pnp.h> +#include <linux/bitmap.h> +#include <linux/mutex.h> +#include "base.h" + +DEFINE_MUTEX(pnp_res_mutex); + +static struct resource *pnp_find_resource(struct pnp_dev *dev, + unsigned char rule, + unsigned long type, + unsigned int bar) +{ + struct resource *res = pnp_get_resource(dev, type, bar); + + /* when the resource already exists, set its resource bits from rule */ + if (res) { + res->flags &= ~IORESOURCE_BITS; + res->flags |= rule & IORESOURCE_BITS; + } + + return res; +} + +static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx) +{ + struct resource *res, local_res; + + res = pnp_find_resource(dev, rule->flags, IORESOURCE_IO, idx); + if (res) { + pnp_dbg(&dev->dev, " io %d already set to %#llx-%#llx " + "flags %#lx\n", idx, (unsigned long long) res->start, + (unsigned long long) res->end, res->flags); + return 0; + } + + res = &local_res; + res->flags = rule->flags | IORESOURCE_AUTO; + res->start = 0; + res->end = 0; + + if (!rule->size) { + res->flags |= IORESOURCE_DISABLED; + pnp_dbg(&dev->dev, " io %d disabled\n", idx); + goto __add; + } + + res->start = rule->min; + res->end = res->start + rule->size - 1; + + while (!pnp_check_port(dev, res)) { + res->start += rule->align; + res->end = res->start + rule->size - 1; + if (res->start > rule->max || !rule->align) { + pnp_dbg(&dev->dev, " couldn't assign io %d " + "(min %#llx max %#llx)\n", idx, + (unsigned long long) rule->min, + (unsigned long long) rule->max); + return -EBUSY; + } + } + +__add: + pnp_add_io_resource(dev, res->start, res->end, res->flags); + return 0; +} + +static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx) +{ + struct resource *res, local_res; + + res = pnp_find_resource(dev, rule->flags, IORESOURCE_MEM, idx); + if (res) { + pnp_dbg(&dev->dev, " mem %d already set to %#llx-%#llx " + "flags %#lx\n", idx, (unsigned long long) res->start, + (unsigned long long) res->end, res->flags); + return 0; + } + + res = &local_res; + res->flags = rule->flags | IORESOURCE_AUTO; + res->start = 0; + res->end = 0; + + /* ??? rule->flags restricted to 8 bits, all tests bogus ??? */ + if (!(rule->flags & IORESOURCE_MEM_WRITEABLE)) + res->flags |= IORESOURCE_READONLY; + if (rule->flags & IORESOURCE_MEM_RANGELENGTH) + res->flags |= IORESOURCE_RANGELENGTH; + if (rule->flags & IORESOURCE_MEM_SHADOWABLE) + res->flags |= IORESOURCE_SHADOWABLE; + + if (!rule->size) { + res->flags |= IORESOURCE_DISABLED; + pnp_dbg(&dev->dev, " mem %d disabled\n", idx); + goto __add; + } + + res->start = rule->min; + res->end = res->start + rule->size - 1; + + while (!pnp_check_mem(dev, res)) { + res->start += rule->align; + res->end = res->start + rule->size - 1; + if (res->start > rule->max || !rule->align) { + pnp_dbg(&dev->dev, " couldn't assign mem %d " + "(min %#llx max %#llx)\n", idx, + (unsigned long long) rule->min, + (unsigned long long) rule->max); + return -EBUSY; + } + } + +__add: + pnp_add_mem_resource(dev, res->start, res->end, res->flags); + return 0; +} + +static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx) +{ + struct resource *res, local_res; + int i; + + /* IRQ priority: this table is good for i386 */ + static unsigned short xtab[16] = { + 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2 + }; + + res = pnp_find_resource(dev, rule->flags, IORESOURCE_IRQ, idx); + if (res) { + pnp_dbg(&dev->dev, " irq %d already set to %d flags %#lx\n", + idx, (int) res->start, res->flags); + return 0; + } + + res = &local_res; + res->flags = rule->flags | IORESOURCE_AUTO; + res->start = -1; + res->end = -1; + + if (bitmap_empty(rule->map.bits, PNP_IRQ_NR)) { + res->flags |= IORESOURCE_DISABLED; + pnp_dbg(&dev->dev, " irq %d disabled\n", idx); + goto __add; + } + + /* TBD: need check for >16 IRQ */ + res->start = find_next_bit(rule->map.bits, PNP_IRQ_NR, 16); + if (res->start < PNP_IRQ_NR) { + res->end = res->start; + goto __add; + } + for (i = 0; i < 16; i++) { + if (test_bit(xtab[i], rule->map.bits)) { + res->start = res->end = xtab[i]; + if (pnp_check_irq(dev, res)) + goto __add; + } + } + + if (rule->flags & IORESOURCE_IRQ_OPTIONAL) { + res->start = -1; + res->end = -1; + res->flags |= IORESOURCE_DISABLED; + pnp_dbg(&dev->dev, " irq %d disabled (optional)\n", idx); + goto __add; + } + + pnp_dbg(&dev->dev, " couldn't assign irq %d\n", idx); + return -EBUSY; + +__add: + pnp_add_irq_resource(dev, res->start, res->flags); + return 0; +} + +#ifdef CONFIG_ISA_DMA_API +static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx) +{ + struct resource *res, local_res; + int i; + + /* DMA priority: this table is good for i386 */ + static unsigned short xtab[8] = { + 1, 3, 5, 6, 7, 0, 2, 4 + }; + + res = pnp_find_resource(dev, rule->flags, IORESOURCE_DMA, idx); + if (res) { + pnp_dbg(&dev->dev, " dma %d already set to %d flags %#lx\n", + idx, (int) res->start, res->flags); + return 0; + } + + res = &local_res; + res->flags = rule->flags | IORESOURCE_AUTO; + res->start = -1; + res->end = -1; + + if (!rule->map) { + res->flags |= IORESOURCE_DISABLED; + pnp_dbg(&dev->dev, " dma %d disabled\n", idx); + goto __add; + } + + for (i = 0; i < 8; i++) { + if (rule->map & (1 << xtab[i])) { + res->start = res->end = xtab[i]; + if (pnp_check_dma(dev, res)) + goto __add; + } + } + + pnp_dbg(&dev->dev, " couldn't assign dma %d\n", idx); + return -EBUSY; + +__add: + pnp_add_dma_resource(dev, res->start, res->flags); + return 0; +} +#endif /* CONFIG_ISA_DMA_API */ + +void pnp_init_resources(struct pnp_dev *dev) +{ + pnp_free_resources(dev); +} + +static void pnp_clean_resource_table(struct pnp_dev *dev) +{ + struct pnp_resource *pnp_res, *tmp; + + list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) { + if (pnp_res->res.flags & IORESOURCE_AUTO) + pnp_free_resource(pnp_res); + } +} + +/** + * pnp_assign_resources - assigns resources to the device based on the specified dependent number + * @dev: pointer to the desired device + * @set: the dependent function number + */ +static int pnp_assign_resources(struct pnp_dev *dev, int set) +{ + struct pnp_option *option; + int nport = 0, nmem = 0, nirq = 0; + int ndma __maybe_unused = 0; + int ret = 0; + + pnp_dbg(&dev->dev, "pnp_assign_resources, try dependent set %d\n", set); + mutex_lock(&pnp_res_mutex); + pnp_clean_resource_table(dev); + + list_for_each_entry(option, &dev->options, list) { + if (pnp_option_is_dependent(option) && + pnp_option_set(option) != set) + continue; + + switch (option->type) { + case IORESOURCE_IO: + ret = pnp_assign_port(dev, &option->u.port, nport++); + break; + case IORESOURCE_MEM: + ret = pnp_assign_mem(dev, &option->u.mem, nmem++); + break; + case IORESOURCE_IRQ: + ret = pnp_assign_irq(dev, &option->u.irq, nirq++); + break; +#ifdef CONFIG_ISA_DMA_API + case IORESOURCE_DMA: + ret = pnp_assign_dma(dev, &option->u.dma, ndma++); + break; +#endif + default: + ret = -EINVAL; + break; + } + if (ret < 0) + break; + } + + mutex_unlock(&pnp_res_mutex); + if (ret < 0) { + pnp_dbg(&dev->dev, "pnp_assign_resources failed (%d)\n", ret); + pnp_clean_resource_table(dev); + } else + dbg_pnp_show_resources(dev, "pnp_assign_resources succeeded"); + return ret; +} + +/** + * pnp_auto_config_dev - automatically assigns resources to a device + * @dev: pointer to the desired device + */ +int pnp_auto_config_dev(struct pnp_dev *dev) +{ + int i, ret; + + if (!pnp_can_configure(dev)) { + pnp_dbg(&dev->dev, "configuration not supported\n"); + return -ENODEV; + } + + ret = pnp_assign_resources(dev, 0); + if (ret == 0) + return 0; + + for (i = 1; i < dev->num_dependent_sets; i++) { + ret = pnp_assign_resources(dev, i); + if (ret == 0) + return 0; + } + + dev_err(&dev->dev, "unable to assign resources\n"); + return ret; +} + +/** + * pnp_start_dev - low-level start of the PnP device + * @dev: pointer to the desired device + * + * assumes that resources have already been allocated + */ +int pnp_start_dev(struct pnp_dev *dev) +{ + if (!pnp_can_write(dev)) { + pnp_dbg(&dev->dev, "activation not supported\n"); + return -EINVAL; + } + + dbg_pnp_show_resources(dev, "pnp_start_dev"); + if (dev->protocol->set(dev) < 0) { + dev_err(&dev->dev, "activation failed\n"); + return -EIO; + } + + dev_info(&dev->dev, "activated\n"); + return 0; +} +EXPORT_SYMBOL(pnp_start_dev); + +/** + * pnp_stop_dev - low-level disable of the PnP device + * @dev: pointer to the desired device + * + * does not free resources + */ +int pnp_stop_dev(struct pnp_dev *dev) +{ + if (!pnp_can_disable(dev)) { + pnp_dbg(&dev->dev, "disabling not supported\n"); + return -EINVAL; + } + if (dev->protocol->disable(dev) < 0) { + dev_err(&dev->dev, "disable failed\n"); + return -EIO; + } + + dev_info(&dev->dev, "disabled\n"); + return 0; +} +EXPORT_SYMBOL(pnp_stop_dev); + +/** + * pnp_activate_dev - activates a PnP device for use + * @dev: pointer to the desired device + * + * does not validate or set resources so be careful. + */ +int pnp_activate_dev(struct pnp_dev *dev) +{ + int error; + + if (dev->active) + return 0; + + /* ensure resources are allocated */ + if (pnp_auto_config_dev(dev)) + return -EBUSY; + + error = pnp_start_dev(dev); + if (error) + return error; + + dev->active = 1; + return 0; +} +EXPORT_SYMBOL(pnp_activate_dev); + +/** + * pnp_disable_dev - disables device + * @dev: pointer to the desired device + * + * inform the correct pnp protocol so that resources can be used by other devices + */ +int pnp_disable_dev(struct pnp_dev *dev) +{ + int error; + + if (!dev->active) + return 0; + + error = pnp_stop_dev(dev); + if (error) + return error; + + dev->active = 0; + + /* release the resources so that other devices can use them */ + mutex_lock(&pnp_res_mutex); + pnp_clean_resource_table(dev); + mutex_unlock(&pnp_res_mutex); + + return 0; +} +EXPORT_SYMBOL(pnp_disable_dev); diff --git a/drivers/pnp/pnpacpi/Kconfig b/drivers/pnp/pnpacpi/Kconfig new file mode 100644 index 0000000000..70f733f63f --- /dev/null +++ b/drivers/pnp/pnpacpi/Kconfig @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Plug and Play ACPI configuration +# +config PNPACPI + bool + default (PNP && ACPI) diff --git a/drivers/pnp/pnpacpi/Makefile b/drivers/pnp/pnpacpi/Makefile new file mode 100644 index 0000000000..fb1c7154c9 --- /dev/null +++ b/drivers/pnp/pnpacpi/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the kernel PNPACPI driver. +# +obj-y += pnp.o + +pnp-y := core.o rsparser.o diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c new file mode 100644 index 0000000000..6ab272c84b --- /dev/null +++ b/drivers/pnp/pnpacpi/core.c @@ -0,0 +1,328 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * pnpacpi -- PnP ACPI driver + * + * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr> + * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com> + */ + +#include <linux/export.h> +#include <linux/acpi.h> +#include <linux/pnp.h> +#include <linux/slab.h> +#include <linux/mod_devicetable.h> + +#include "../base.h" +#include "pnpacpi.h" + +static int num; + +/* + * Compatible Device IDs + */ +#define TEST_HEX(c) \ + if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \ + return 0 +#define TEST_ALPHA(c) \ + if (!('A' <= (c) && (c) <= 'Z')) \ + return 0 +static int __init ispnpidacpi(const char *id) +{ + TEST_ALPHA(id[0]); + TEST_ALPHA(id[1]); + TEST_ALPHA(id[2]); + TEST_HEX(id[3]); + TEST_HEX(id[4]); + TEST_HEX(id[5]); + TEST_HEX(id[6]); + if (id[7] != '\0') + return 0; + return 1; +} + +static int pnpacpi_get_resources(struct pnp_dev *dev) +{ + pnp_dbg(&dev->dev, "get resources\n"); + return pnpacpi_parse_allocated_resource(dev); +} + +static int pnpacpi_set_resources(struct pnp_dev *dev) +{ + struct acpi_device *acpi_dev; + acpi_handle handle; + int ret = 0; + + pnp_dbg(&dev->dev, "set resources\n"); + + acpi_dev = ACPI_COMPANION(&dev->dev); + if (!acpi_dev) { + dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); + return -ENODEV; + } + + if (WARN_ON_ONCE(acpi_dev != dev->data)) + dev->data = acpi_dev; + + handle = acpi_dev->handle; + if (acpi_has_method(handle, METHOD_NAME__SRS)) { + struct acpi_buffer buffer; + + ret = pnpacpi_build_resource_template(dev, &buffer); + if (ret) + return ret; + + ret = pnpacpi_encode_resources(dev, &buffer); + if (!ret) { + acpi_status status; + + status = acpi_set_current_resources(handle, &buffer); + if (ACPI_FAILURE(status)) + ret = -EIO; + } + kfree(buffer.pointer); + } + if (!ret && acpi_device_power_manageable(acpi_dev)) + ret = acpi_device_set_power(acpi_dev, ACPI_STATE_D0); + + return ret; +} + +static int pnpacpi_disable_resources(struct pnp_dev *dev) +{ + struct acpi_device *acpi_dev; + acpi_status status; + + dev_dbg(&dev->dev, "disable resources\n"); + + acpi_dev = ACPI_COMPANION(&dev->dev); + if (!acpi_dev) { + dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); + return 0; + } + + /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ + if (acpi_device_power_manageable(acpi_dev)) + acpi_device_set_power(acpi_dev, ACPI_STATE_D3_COLD); + + /* continue even if acpi_device_set_power() fails */ + status = acpi_evaluate_object(acpi_dev->handle, "_DIS", NULL, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) + return -ENODEV; + + return 0; +} + +#ifdef CONFIG_ACPI_SLEEP +static bool pnpacpi_can_wakeup(struct pnp_dev *dev) +{ + struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev); + + if (!acpi_dev) { + dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); + return false; + } + + return acpi_bus_can_wakeup(acpi_dev->handle); +} + +static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) +{ + struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev); + int error = 0; + + if (!acpi_dev) { + dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); + return 0; + } + + if (device_can_wakeup(&dev->dev)) { + error = acpi_pm_set_device_wakeup(&dev->dev, + device_may_wakeup(&dev->dev)); + if (error) + return error; + } + + if (acpi_device_power_manageable(acpi_dev)) { + int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL, + ACPI_STATE_D3_COLD); + if (power_state < 0) + power_state = (state.event == PM_EVENT_ON) ? + ACPI_STATE_D0 : ACPI_STATE_D3_COLD; + + /* + * acpi_device_set_power() can fail (keyboard port can't be + * powered-down?), and in any case, our return value is ignored + * by pnp_bus_suspend(). Hence we don't revert the wakeup + * setting if the set_power fails. + */ + error = acpi_device_set_power(acpi_dev, power_state); + } + + return error; +} + +static int pnpacpi_resume(struct pnp_dev *dev) +{ + struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev); + int error = 0; + + if (!acpi_dev) { + dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); + return -ENODEV; + } + + if (device_may_wakeup(&dev->dev)) + acpi_pm_set_device_wakeup(&dev->dev, false); + + if (acpi_device_power_manageable(acpi_dev)) + error = acpi_device_set_power(acpi_dev, ACPI_STATE_D0); + + return error; +} +#endif + +struct pnp_protocol pnpacpi_protocol = { + .name = "Plug and Play ACPI", + .get = pnpacpi_get_resources, + .set = pnpacpi_set_resources, + .disable = pnpacpi_disable_resources, +#ifdef CONFIG_ACPI_SLEEP + .can_wakeup = pnpacpi_can_wakeup, + .suspend = pnpacpi_suspend, + .resume = pnpacpi_resume, +#endif +}; +EXPORT_SYMBOL(pnpacpi_protocol); + +static const char *__init pnpacpi_get_id(struct acpi_device *device) +{ + struct acpi_hardware_id *id; + + list_for_each_entry(id, &device->pnp.ids, list) { + if (ispnpidacpi(id->id)) + return id->id; + } + + return NULL; +} + +static int __init pnpacpi_add_device(struct acpi_device *device) +{ + struct pnp_dev *dev; + const char *pnpid; + struct acpi_hardware_id *id; + int error; + + /* Skip devices that are already bound */ + if (device->physical_node_count) + return 0; + + /* + * If a PnPacpi device is not present , the device + * driver should not be loaded. + */ + if (!acpi_has_method(device->handle, "_CRS")) + return 0; + + pnpid = pnpacpi_get_id(device); + if (!pnpid) + return 0; + + if (!device->status.present) + return 0; + + dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid); + if (!dev) + return -ENOMEM; + + ACPI_COMPANION_SET(&dev->dev, device); + dev->data = device; + /* .enabled means the device can decode the resources */ + dev->active = device->status.enabled; + if (acpi_has_method(device->handle, "_SRS")) + dev->capabilities |= PNP_CONFIGURABLE; + dev->capabilities |= PNP_READ; + if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) + dev->capabilities |= PNP_WRITE; + if (device->flags.removable) + dev->capabilities |= PNP_REMOVABLE; + if (acpi_has_method(device->handle, "_DIS")) + dev->capabilities |= PNP_DISABLE; + + if (strlen(acpi_device_name(device))) + strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); + else + strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); + + /* Handle possible string truncation */ + dev->name[sizeof(dev->name) - 1] = '\0'; + + if (dev->active) + pnpacpi_parse_allocated_resource(dev); + + if (dev->capabilities & PNP_CONFIGURABLE) + pnpacpi_parse_resource_option_data(dev); + + list_for_each_entry(id, &device->pnp.ids, list) { + if (!strcmp(id->id, pnpid)) + continue; + if (!ispnpidacpi(id->id)) + continue; + pnp_add_id(dev, id->id); + } + + /* clear out the damaged flags */ + if (!dev->active) + pnp_init_resources(dev); + + error = pnp_add_device(dev); + if (error) { + put_device(&dev->dev); + return error; + } + + num++; + + return 0; +} + +static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, + u32 lvl, void *context, + void **rv) +{ + struct acpi_device *device = acpi_fetch_acpi_dev(handle); + + if (!device) + return AE_CTRL_DEPTH; + if (acpi_is_pnp_device(device)) + pnpacpi_add_device(device); + return AE_OK; +} + +int pnpacpi_disabled __initdata; +static int __init pnpacpi_init(void) +{ + if (acpi_disabled || pnpacpi_disabled) { + printk(KERN_INFO "pnp: PnP ACPI: disabled\n"); + return 0; + } + printk(KERN_INFO "pnp: PnP ACPI init\n"); + pnp_register_protocol(&pnpacpi_protocol); + acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); + printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num); + pnp_platform_devices = 1; + return 0; +} + +fs_initcall(pnpacpi_init); + +static int __init pnpacpi_setup(char *str) +{ + if (str == NULL) + return 1; + if (!strncmp(str, "off", 3)) + pnpacpi_disabled = 1; + return 1; +} + +__setup("pnpacpi=", pnpacpi_setup); diff --git a/drivers/pnp/pnpacpi/pnpacpi.h b/drivers/pnp/pnpacpi/pnpacpi.h new file mode 100644 index 0000000000..4489cd6dbc --- /dev/null +++ b/drivers/pnp/pnpacpi/pnpacpi.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef ACPI_PNP_H +#define ACPI_PNP_H + +#include <linux/acpi.h> +#include <linux/pnp.h> + +int pnpacpi_parse_allocated_resource(struct pnp_dev *); +int pnpacpi_parse_resource_option_data(struct pnp_dev *); +int pnpacpi_encode_resources(struct pnp_dev *, struct acpi_buffer *); +int pnpacpi_build_resource_template(struct pnp_dev *, struct acpi_buffer *); +#endif diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c new file mode 100644 index 0000000000..4f05f61039 --- /dev/null +++ b/drivers/pnp/pnpacpi/rsparser.c @@ -0,0 +1,948 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * pnpacpi -- PnP ACPI driver + * + * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr> + * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com> + * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ +#include <linux/kernel.h> +#include <linux/acpi.h> +#include <linux/pci.h> +#include <linux/pnp.h> +#include <linux/slab.h> +#include "../base.h" +#include "pnpacpi.h" + +static void decode_irq_flags(struct pnp_dev *dev, int flags, u8 *triggering, + u8 *polarity, u8 *shareable) +{ + switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL | + IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE)) { + case IORESOURCE_IRQ_LOWLEVEL: + *triggering = ACPI_LEVEL_SENSITIVE; + *polarity = ACPI_ACTIVE_LOW; + break; + case IORESOURCE_IRQ_HIGHLEVEL: + *triggering = ACPI_LEVEL_SENSITIVE; + *polarity = ACPI_ACTIVE_HIGH; + break; + case IORESOURCE_IRQ_LOWEDGE: + *triggering = ACPI_EDGE_SENSITIVE; + *polarity = ACPI_ACTIVE_LOW; + break; + case IORESOURCE_IRQ_HIGHEDGE: + *triggering = ACPI_EDGE_SENSITIVE; + *polarity = ACPI_ACTIVE_HIGH; + break; + default: + dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n", + flags); + *triggering = ACPI_EDGE_SENSITIVE; + *polarity = ACPI_ACTIVE_HIGH; + break; + } + + if (flags & IORESOURCE_IRQ_SHAREABLE) + *shareable = ACPI_SHARED; + else + *shareable = ACPI_EXCLUSIVE; +} + +static int dma_flags(struct pnp_dev *dev, int type, int bus_master, + int transfer) +{ + int flags = 0; + + if (bus_master) + flags |= IORESOURCE_DMA_MASTER; + switch (type) { + case ACPI_COMPATIBILITY: + flags |= IORESOURCE_DMA_COMPATIBLE; + break; + case ACPI_TYPE_A: + flags |= IORESOURCE_DMA_TYPEA; + break; + case ACPI_TYPE_B: + flags |= IORESOURCE_DMA_TYPEB; + break; + case ACPI_TYPE_F: + flags |= IORESOURCE_DMA_TYPEF; + break; + default: + /* Set a default value ? */ + flags |= IORESOURCE_DMA_COMPATIBLE; + dev_err(&dev->dev, "invalid DMA type %d\n", type); + } + switch (transfer) { + case ACPI_TRANSFER_8: + flags |= IORESOURCE_DMA_8BIT; + break; + case ACPI_TRANSFER_8_16: + flags |= IORESOURCE_DMA_8AND16BIT; + break; + case ACPI_TRANSFER_16: + flags |= IORESOURCE_DMA_16BIT; + break; + default: + /* Set a default value ? */ + flags |= IORESOURCE_DMA_8AND16BIT; + dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer); + } + + return flags; +} + +/* + * Allocated Resources + */ + +static void pnpacpi_add_irqresource(struct pnp_dev *dev, struct resource *r) +{ + if (!(r->flags & IORESOURCE_DISABLED)) + pcibios_penalize_isa_irq(r->start, 1); + + pnp_add_resource(dev, r); +} + +/* + * Device CSRs that do not appear in PCI config space should be described + * via ACPI. This would normally be done with Address Space Descriptors + * marked as "consumer-only," but old versions of Windows and Linux ignore + * the producer/consumer flag, so HP invented a vendor-defined resource to + * describe the location and size of CSR space. + */ +static struct acpi_vendor_uuid hp_ccsr_uuid = { + .subtype = 2, + .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a, + 0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad }, +}; + +static int vendor_resource_matches(struct pnp_dev *dev, + struct acpi_resource_vendor_typed *vendor, + struct acpi_vendor_uuid *match, + int expected_len) +{ + int uuid_len = sizeof(vendor->uuid); + u8 uuid_subtype = vendor->uuid_subtype; + u8 *uuid = vendor->uuid; + int actual_len; + + /* byte_length includes uuid_subtype and uuid */ + actual_len = vendor->byte_length - uuid_len - 1; + + if (uuid_subtype == match->subtype && + uuid_len == sizeof(match->data) && + memcmp(uuid, match->data, uuid_len) == 0) { + if (expected_len && expected_len != actual_len) { + dev_err(&dev->dev, + "wrong vendor descriptor size; expected %d, found %d bytes\n", + expected_len, actual_len); + return 0; + } + + return 1; + } + + return 0; +} + +static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev, + struct acpi_resource_vendor_typed *vendor) +{ + if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) { + u64 start, length; + + memcpy(&start, vendor->byte_data, sizeof(start)); + memcpy(&length, vendor->byte_data + 8, sizeof(length)); + + pnp_add_mem_resource(dev, start, start + length - 1, 0); + } +} + +static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res, + void *data) +{ + struct pnp_dev *dev = data; + struct acpi_resource_dma *dma; + struct acpi_resource_vendor_typed *vendor_typed; + struct acpi_resource_gpio *gpio; + struct resource_win win = {{0}, 0}; + struct resource *r = &win.res; + int i, flags; + + if (acpi_dev_resource_address_space(res, &win) + || acpi_dev_resource_ext_address_space(res, &win)) { + pnp_add_resource(dev, &win.res); + return AE_OK; + } + + r->flags = 0; + if (acpi_dev_resource_interrupt(res, 0, r)) { + pnpacpi_add_irqresource(dev, r); + for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++) + pnpacpi_add_irqresource(dev, r); + + if (i > 1) { + /* + * The IRQ encoder puts a single interrupt in each + * descriptor, so if a _CRS descriptor has more than + * one interrupt, we won't be able to re-encode it. + */ + if (pnp_can_write(dev)) { + dev_warn(&dev->dev, + "multiple interrupts in _CRS descriptor; configuration can't be changed\n"); + dev->capabilities &= ~PNP_WRITE; + } + } + return AE_OK; + } else if (acpi_gpio_get_irq_resource(res, &gpio)) { + /* + * If the resource is GpioInt() type then extract the IRQ + * from GPIO resource and fill it into IRQ resource type. + */ + i = acpi_dev_gpio_irq_get(dev->data, 0); + if (i >= 0) { + flags = acpi_dev_irq_flags(gpio->triggering, + gpio->polarity, + gpio->shareable, + gpio->wake_capable); + } else { + flags = IORESOURCE_DISABLED; + } + pnp_add_irq_resource(dev, i, flags); + return AE_OK; + } else if (r->flags & IORESOURCE_DISABLED) { + pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED); + return AE_OK; + } + + switch (res->type) { + case ACPI_RESOURCE_TYPE_MEMORY24: + case ACPI_RESOURCE_TYPE_MEMORY32: + case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: + if (acpi_dev_resource_memory(res, r)) + pnp_add_resource(dev, r); + break; + case ACPI_RESOURCE_TYPE_IO: + case ACPI_RESOURCE_TYPE_FIXED_IO: + if (acpi_dev_resource_io(res, r)) + pnp_add_resource(dev, r); + break; + case ACPI_RESOURCE_TYPE_DMA: + dma = &res->data.dma; + if (dma->channel_count > 0 && dma->channels[0] != (u8) -1) + flags = dma_flags(dev, dma->type, dma->bus_master, + dma->transfer); + else + flags = IORESOURCE_DISABLED; + pnp_add_dma_resource(dev, dma->channels[0], flags); + break; + + case ACPI_RESOURCE_TYPE_START_DEPENDENT: + case ACPI_RESOURCE_TYPE_END_DEPENDENT: + break; + + case ACPI_RESOURCE_TYPE_VENDOR: + vendor_typed = &res->data.vendor_typed; + pnpacpi_parse_allocated_vendor(dev, vendor_typed); + break; + + case ACPI_RESOURCE_TYPE_END_TAG: + break; + + case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: + break; + + case ACPI_RESOURCE_TYPE_SERIAL_BUS: + /* serial bus connections (I2C/SPI/UART) are not pnp */ + break; + + default: + dev_warn(&dev->dev, "unknown resource type %d in _CRS\n", + res->type); + return AE_ERROR; + } + + return AE_OK; +} + +int pnpacpi_parse_allocated_resource(struct pnp_dev *dev) +{ + struct acpi_device *acpi_dev = dev->data; + acpi_handle handle = acpi_dev->handle; + acpi_status status; + + pnp_dbg(&dev->dev, "parse allocated resources\n"); + + pnp_init_resources(dev); + + status = acpi_walk_resources(handle, METHOD_NAME__CRS, + pnpacpi_allocated_resource, dev); + + if (ACPI_FAILURE(status)) { + if (status != AE_NOT_FOUND) + dev_err(&dev->dev, "can't evaluate _CRS: %d", status); + return -EPERM; + } + return 0; +} + +static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_dma *p) +{ + int i; + unsigned char map = 0, flags; + + for (i = 0; i < p->channel_count; i++) + map |= 1 << p->channels[i]; + + flags = dma_flags(dev, p->type, p->bus_master, p->transfer); + pnp_register_dma_resource(dev, option_flags, map, flags); +} + +static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_irq *p) +{ + int i; + pnp_irq_mask_t map; + unsigned char flags; + + bitmap_zero(map.bits, PNP_IRQ_NR); + for (i = 0; i < p->interrupt_count; i++) + if (p->interrupts[i]) + __set_bit(p->interrupts[i], map.bits); + + flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable, p->wake_capable); + pnp_register_irq_resource(dev, option_flags, &map, flags); +} + +static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_extended_irq *p) +{ + int i; + pnp_irq_mask_t map; + unsigned char flags; + + bitmap_zero(map.bits, PNP_IRQ_NR); + for (i = 0; i < p->interrupt_count; i++) { + if (p->interrupts[i]) { + if (p->interrupts[i] < PNP_IRQ_NR) + __set_bit(p->interrupts[i], map.bits); + else + dev_err(&dev->dev, + "ignoring IRQ %d option (too large for %d entry bitmap)\n", + p->interrupts[i], PNP_IRQ_NR); + } + } + + flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->shareable, p->wake_capable); + pnp_register_irq_resource(dev, option_flags, &map, flags); +} + +static __init void pnpacpi_parse_port_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_io *io) +{ + unsigned char flags = 0; + + if (io->io_decode == ACPI_DECODE_16) + flags = IORESOURCE_IO_16BIT_ADDR; + pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum, + io->alignment, io->address_length, flags); +} + +static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_fixed_io *io) +{ + pnp_register_port_resource(dev, option_flags, io->address, io->address, + 0, io->address_length, IORESOURCE_IO_FIXED); +} + +static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_memory24 *p) +{ + unsigned char flags = 0; + + if (p->write_protect == ACPI_READ_WRITE_MEMORY) + flags = IORESOURCE_MEM_WRITEABLE; + pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum, + p->alignment, p->address_length, flags); +} + +static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_memory32 *p) +{ + unsigned char flags = 0; + + if (p->write_protect == ACPI_READ_WRITE_MEMORY) + flags = IORESOURCE_MEM_WRITEABLE; + pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum, + p->alignment, p->address_length, flags); +} + +static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource_fixed_memory32 *p) +{ + unsigned char flags = 0; + + if (p->write_protect == ACPI_READ_WRITE_MEMORY) + flags = IORESOURCE_MEM_WRITEABLE; + pnp_register_mem_resource(dev, option_flags, p->address, p->address, + 0, p->address_length, flags); +} + +static __init void pnpacpi_parse_address_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource *r) +{ + struct acpi_resource_address64 addr, *p = &addr; + acpi_status status; + unsigned char flags = 0; + + status = acpi_resource_to_address64(r, p); + if (ACPI_FAILURE(status)) { + dev_warn(&dev->dev, "can't convert resource type %d\n", + r->type); + return; + } + + if (p->resource_type == ACPI_MEMORY_RANGE) { + if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY) + flags = IORESOURCE_MEM_WRITEABLE; + pnp_register_mem_resource(dev, option_flags, p->address.minimum, + p->address.minimum, 0, p->address.address_length, + flags); + } else if (p->resource_type == ACPI_IO_RANGE) + pnp_register_port_resource(dev, option_flags, p->address.minimum, + p->address.minimum, 0, p->address.address_length, + IORESOURCE_IO_FIXED); +} + +static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev, + unsigned int option_flags, + struct acpi_resource *r) +{ + struct acpi_resource_extended_address64 *p = &r->data.ext_address64; + unsigned char flags = 0; + + if (p->resource_type == ACPI_MEMORY_RANGE) { + if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY) + flags = IORESOURCE_MEM_WRITEABLE; + pnp_register_mem_resource(dev, option_flags, p->address.minimum, + p->address.minimum, 0, p->address.address_length, + flags); + } else if (p->resource_type == ACPI_IO_RANGE) + pnp_register_port_resource(dev, option_flags, p->address.minimum, + p->address.minimum, 0, p->address.address_length, + IORESOURCE_IO_FIXED); +} + +struct acpipnp_parse_option_s { + struct pnp_dev *dev; + unsigned int option_flags; +}; + +static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res, + void *data) +{ + int priority; + struct acpipnp_parse_option_s *parse_data = data; + struct pnp_dev *dev = parse_data->dev; + unsigned int option_flags = parse_data->option_flags; + + switch (res->type) { + case ACPI_RESOURCE_TYPE_IRQ: + pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq); + break; + + case ACPI_RESOURCE_TYPE_DMA: + pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma); + break; + + case ACPI_RESOURCE_TYPE_START_DEPENDENT: + switch (res->data.start_dpf.compatibility_priority) { + case ACPI_GOOD_CONFIGURATION: + priority = PNP_RES_PRIORITY_PREFERRED; + break; + + case ACPI_ACCEPTABLE_CONFIGURATION: + priority = PNP_RES_PRIORITY_ACCEPTABLE; + break; + + case ACPI_SUB_OPTIMAL_CONFIGURATION: + priority = PNP_RES_PRIORITY_FUNCTIONAL; + break; + default: + priority = PNP_RES_PRIORITY_INVALID; + break; + } + parse_data->option_flags = pnp_new_dependent_set(dev, priority); + break; + + case ACPI_RESOURCE_TYPE_END_DEPENDENT: + parse_data->option_flags = 0; + break; + + case ACPI_RESOURCE_TYPE_IO: + pnpacpi_parse_port_option(dev, option_flags, &res->data.io); + break; + + case ACPI_RESOURCE_TYPE_FIXED_IO: + pnpacpi_parse_fixed_port_option(dev, option_flags, + &res->data.fixed_io); + break; + + case ACPI_RESOURCE_TYPE_VENDOR: + case ACPI_RESOURCE_TYPE_END_TAG: + break; + + case ACPI_RESOURCE_TYPE_MEMORY24: + pnpacpi_parse_mem24_option(dev, option_flags, + &res->data.memory24); + break; + + case ACPI_RESOURCE_TYPE_MEMORY32: + pnpacpi_parse_mem32_option(dev, option_flags, + &res->data.memory32); + break; + + case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: + pnpacpi_parse_fixed_mem32_option(dev, option_flags, + &res->data.fixed_memory32); + break; + + case ACPI_RESOURCE_TYPE_ADDRESS16: + case ACPI_RESOURCE_TYPE_ADDRESS32: + case ACPI_RESOURCE_TYPE_ADDRESS64: + pnpacpi_parse_address_option(dev, option_flags, res); + break; + + case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: + pnpacpi_parse_ext_address_option(dev, option_flags, res); + break; + + case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: + pnpacpi_parse_ext_irq_option(dev, option_flags, + &res->data.extended_irq); + break; + + case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: + break; + + default: + dev_warn(&dev->dev, "unknown resource type %d in _PRS\n", + res->type); + return AE_ERROR; + } + + return AE_OK; +} + +int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev) +{ + struct acpi_device *acpi_dev = dev->data; + acpi_handle handle = acpi_dev->handle; + acpi_status status; + struct acpipnp_parse_option_s parse_data; + + pnp_dbg(&dev->dev, "parse resource options\n"); + + parse_data.dev = dev; + parse_data.option_flags = 0; + + status = acpi_walk_resources(handle, METHOD_NAME__PRS, + pnpacpi_option_resource, &parse_data); + + if (ACPI_FAILURE(status)) { + if (status != AE_NOT_FOUND) + dev_err(&dev->dev, "can't evaluate _PRS: %d", status); + return -EPERM; + } + return 0; +} + +static int pnpacpi_supported_resource(struct acpi_resource *res) +{ + switch (res->type) { + case ACPI_RESOURCE_TYPE_IRQ: + case ACPI_RESOURCE_TYPE_DMA: + case ACPI_RESOURCE_TYPE_IO: + case ACPI_RESOURCE_TYPE_FIXED_IO: + case ACPI_RESOURCE_TYPE_MEMORY24: + case ACPI_RESOURCE_TYPE_MEMORY32: + case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: + case ACPI_RESOURCE_TYPE_ADDRESS16: + case ACPI_RESOURCE_TYPE_ADDRESS32: + case ACPI_RESOURCE_TYPE_ADDRESS64: + case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: + case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: + return 1; + } + return 0; +} + +/* + * Set resource + */ +static acpi_status pnpacpi_count_resources(struct acpi_resource *res, + void *data) +{ + int *res_cnt = data; + + if (pnpacpi_supported_resource(res)) + (*res_cnt)++; + return AE_OK; +} + +static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data) +{ + struct acpi_resource **resource = data; + + if (pnpacpi_supported_resource(res)) { + (*resource)->type = res->type; + (*resource)->length = sizeof(struct acpi_resource); + if (res->type == ACPI_RESOURCE_TYPE_IRQ) + (*resource)->data.irq.descriptor_length = + res->data.irq.descriptor_length; + (*resource)++; + } + + return AE_OK; +} + +int pnpacpi_build_resource_template(struct pnp_dev *dev, + struct acpi_buffer *buffer) +{ + struct acpi_device *acpi_dev = dev->data; + acpi_handle handle = acpi_dev->handle; + struct acpi_resource *resource; + int res_cnt = 0; + acpi_status status; + + status = acpi_walk_resources(handle, METHOD_NAME__CRS, + pnpacpi_count_resources, &res_cnt); + if (ACPI_FAILURE(status)) { + dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status); + return -EINVAL; + } + if (!res_cnt) + return -EINVAL; + buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1; + buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL); + if (!buffer->pointer) + return -ENOMEM; + + resource = (struct acpi_resource *)buffer->pointer; + status = acpi_walk_resources(handle, METHOD_NAME__CRS, + pnpacpi_type_resources, &resource); + if (ACPI_FAILURE(status)) { + kfree(buffer->pointer); + dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status); + return -EINVAL; + } + /* resource will pointer the end resource now */ + resource->type = ACPI_RESOURCE_TYPE_END_TAG; + resource->length = sizeof(struct acpi_resource); + + return 0; +} + +static void pnpacpi_encode_irq(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_irq *irq = &resource->data.irq; + u8 triggering, polarity, shareable; + + if (!pnp_resource_enabled(p)) { + irq->interrupt_count = 0; + pnp_dbg(&dev->dev, " encode irq (%s)\n", + p ? "disabled" : "missing"); + return; + } + + decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable); + irq->triggering = triggering; + irq->polarity = polarity; + irq->shareable = shareable; + irq->interrupt_count = 1; + irq->interrupts[0] = p->start; + + pnp_dbg(&dev->dev, " encode irq %d %s %s %s (%d-byte descriptor)\n", + (int) p->start, + triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge", + polarity == ACPI_ACTIVE_LOW ? "low" : "high", + irq->shareable == ACPI_SHARED ? "shared" : "exclusive", + irq->descriptor_length); +} + +static void pnpacpi_encode_ext_irq(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq; + u8 triggering, polarity, shareable; + + if (!pnp_resource_enabled(p)) { + extended_irq->interrupt_count = 0; + pnp_dbg(&dev->dev, " encode extended irq (%s)\n", + p ? "disabled" : "missing"); + return; + } + + decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable); + extended_irq->producer_consumer = ACPI_CONSUMER; + extended_irq->triggering = triggering; + extended_irq->polarity = polarity; + extended_irq->shareable = shareable; + extended_irq->interrupt_count = 1; + extended_irq->interrupts[0] = p->start; + + pnp_dbg(&dev->dev, " encode irq %d %s %s %s\n", (int) p->start, + triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge", + polarity == ACPI_ACTIVE_LOW ? "low" : "high", + extended_irq->shareable == ACPI_SHARED ? "shared" : "exclusive"); +} + +static void pnpacpi_encode_dma(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_dma *dma = &resource->data.dma; + + if (!pnp_resource_enabled(p)) { + dma->channel_count = 0; + pnp_dbg(&dev->dev, " encode dma (%s)\n", + p ? "disabled" : "missing"); + return; + } + + /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */ + switch (p->flags & IORESOURCE_DMA_SPEED_MASK) { + case IORESOURCE_DMA_TYPEA: + dma->type = ACPI_TYPE_A; + break; + case IORESOURCE_DMA_TYPEB: + dma->type = ACPI_TYPE_B; + break; + case IORESOURCE_DMA_TYPEF: + dma->type = ACPI_TYPE_F; + break; + default: + dma->type = ACPI_COMPATIBILITY; + } + + switch (p->flags & IORESOURCE_DMA_TYPE_MASK) { + case IORESOURCE_DMA_8BIT: + dma->transfer = ACPI_TRANSFER_8; + break; + case IORESOURCE_DMA_8AND16BIT: + dma->transfer = ACPI_TRANSFER_8_16; + break; + default: + dma->transfer = ACPI_TRANSFER_16; + } + + dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER); + dma->channel_count = 1; + dma->channels[0] = p->start; + + pnp_dbg(&dev->dev, " encode dma %d " + "type %#x transfer %#x master %d\n", + (int) p->start, dma->type, dma->transfer, dma->bus_master); +} + +static void pnpacpi_encode_io(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_io *io = &resource->data.io; + + if (pnp_resource_enabled(p)) { + /* Note: pnp_assign_port copies pnp_port->flags into p->flags */ + io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ? + ACPI_DECODE_16 : ACPI_DECODE_10; + io->minimum = p->start; + io->maximum = p->end; + io->alignment = 0; /* Correct? */ + io->address_length = resource_size(p); + } else { + io->minimum = 0; + io->address_length = 0; + } + + pnp_dbg(&dev->dev, " encode io %#x-%#x decode %#x\n", io->minimum, + io->minimum + io->address_length - 1, io->io_decode); +} + +static void pnpacpi_encode_fixed_io(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io; + + if (pnp_resource_enabled(p)) { + fixed_io->address = p->start; + fixed_io->address_length = resource_size(p); + } else { + fixed_io->address = 0; + fixed_io->address_length = 0; + } + + pnp_dbg(&dev->dev, " encode fixed_io %#x-%#x\n", fixed_io->address, + fixed_io->address + fixed_io->address_length - 1); +} + +static void pnpacpi_encode_mem24(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_memory24 *memory24 = &resource->data.memory24; + + if (pnp_resource_enabled(p)) { + /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */ + memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ? + ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY; + memory24->minimum = p->start; + memory24->maximum = p->end; + memory24->alignment = 0; + memory24->address_length = resource_size(p); + } else { + memory24->minimum = 0; + memory24->address_length = 0; + } + + pnp_dbg(&dev->dev, " encode mem24 %#x-%#x write_protect %#x\n", + memory24->minimum, + memory24->minimum + memory24->address_length - 1, + memory24->write_protect); +} + +static void pnpacpi_encode_mem32(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_memory32 *memory32 = &resource->data.memory32; + + if (pnp_resource_enabled(p)) { + memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ? + ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY; + memory32->minimum = p->start; + memory32->maximum = p->end; + memory32->alignment = 0; + memory32->address_length = resource_size(p); + } else { + memory32->minimum = 0; + memory32->alignment = 0; + } + + pnp_dbg(&dev->dev, " encode mem32 %#x-%#x write_protect %#x\n", + memory32->minimum, + memory32->minimum + memory32->address_length - 1, + memory32->write_protect); +} + +static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev, + struct acpi_resource *resource, + struct resource *p) +{ + struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32; + + if (pnp_resource_enabled(p)) { + fixed_memory32->write_protect = + p->flags & IORESOURCE_MEM_WRITEABLE ? + ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY; + fixed_memory32->address = p->start; + fixed_memory32->address_length = resource_size(p); + } else { + fixed_memory32->address = 0; + fixed_memory32->address_length = 0; + } + + pnp_dbg(&dev->dev, " encode fixed_mem32 %#x-%#x write_protect %#x\n", + fixed_memory32->address, + fixed_memory32->address + fixed_memory32->address_length - 1, + fixed_memory32->write_protect); +} + +int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer) +{ + int i = 0; + /* pnpacpi_build_resource_template allocates extra mem */ + int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1; + struct acpi_resource *resource = buffer->pointer; + unsigned int port = 0, irq = 0, dma = 0, mem = 0; + + pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt); + while (i < res_cnt) { + switch (resource->type) { + case ACPI_RESOURCE_TYPE_IRQ: + pnpacpi_encode_irq(dev, resource, + pnp_get_resource(dev, IORESOURCE_IRQ, irq)); + irq++; + break; + + case ACPI_RESOURCE_TYPE_DMA: + pnpacpi_encode_dma(dev, resource, + pnp_get_resource(dev, IORESOURCE_DMA, dma)); + dma++; + break; + case ACPI_RESOURCE_TYPE_IO: + pnpacpi_encode_io(dev, resource, + pnp_get_resource(dev, IORESOURCE_IO, port)); + port++; + break; + case ACPI_RESOURCE_TYPE_FIXED_IO: + pnpacpi_encode_fixed_io(dev, resource, + pnp_get_resource(dev, IORESOURCE_IO, port)); + port++; + break; + case ACPI_RESOURCE_TYPE_MEMORY24: + pnpacpi_encode_mem24(dev, resource, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + case ACPI_RESOURCE_TYPE_MEMORY32: + pnpacpi_encode_mem32(dev, resource, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: + pnpacpi_encode_fixed_mem32(dev, resource, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: + pnpacpi_encode_ext_irq(dev, resource, + pnp_get_resource(dev, IORESOURCE_IRQ, irq)); + irq++; + break; + case ACPI_RESOURCE_TYPE_START_DEPENDENT: + case ACPI_RESOURCE_TYPE_END_DEPENDENT: + case ACPI_RESOURCE_TYPE_VENDOR: + case ACPI_RESOURCE_TYPE_END_TAG: + case ACPI_RESOURCE_TYPE_ADDRESS16: + case ACPI_RESOURCE_TYPE_ADDRESS32: + case ACPI_RESOURCE_TYPE_ADDRESS64: + case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: + case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: + default: /* other type */ + dev_warn(&dev->dev, + "can't encode unknown resource type %d\n", + resource->type); + return -EINVAL; + } + resource++; + i++; + } + return 0; +} diff --git a/drivers/pnp/pnpbios/Kconfig b/drivers/pnp/pnpbios/Kconfig new file mode 100644 index 0000000000..bcdac269af --- /dev/null +++ b/drivers/pnp/pnpbios/Kconfig @@ -0,0 +1,43 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Plug and Play BIOS configuration +# +config PNPBIOS + bool "Plug and Play BIOS support" + depends on ISA && X86_32 + default n + help + Linux uses the PNPBIOS as defined in "Plug and Play BIOS + Specification Version 1.0A May 5, 1994" to autodetect built-in + mainboard resources (e.g. parallel port resources). + + Some features (e.g. event notification, docking station information, + ISAPNP services) are not currently implemented. + + If you would like the kernel to detect and allocate resources to + your mainboard devices (on some systems they are disabled by the + BIOS) say Y here. Also the PNPBIOS can help prevent resource + conflicts between mainboard devices and other bus devices. + + Note: ACPI is expected to supersede PNPBIOS some day, currently it + co-exists nicely. If you have a non-ISA system that supports ACPI, + you probably don't need PNPBIOS support. + +config PNPBIOS_PROC_FS + bool "Plug and Play BIOS /proc interface" + depends on PNPBIOS && PROC_FS + help + If you say Y here and to "/proc file system support", you will be + able to directly access the PNPBIOS. This includes resource + allocation, ESCD, and other PNPBIOS services. Using this + interface is potentially dangerous because the PNPBIOS driver will + not be notified of any resource changes made by writing directly. + Also some buggy systems will fault when accessing certain features + in the PNPBIOS /proc interface (e.g. "boot" configs). + + See the latest pcmcia-cs (stand-alone package) for a nice set of + PNPBIOS /proc interface tools (lspnp and setpnp). + + Unless you are debugging or have other specific reasons, it is + recommended that you say N here. + diff --git a/drivers/pnp/pnpbios/Makefile b/drivers/pnp/pnpbios/Makefile new file mode 100644 index 0000000000..a91437c56b --- /dev/null +++ b/drivers/pnp/pnpbios/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the kernel PNPBIOS driver. +# +obj-y := pnp.o + +pnp-y := core.o bioscalls.o rsparser.o + +pnp-$(CONFIG_PNPBIOS_PROC_FS) += proc.o diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c new file mode 100644 index 0000000000..ddc6f2163c --- /dev/null +++ b/drivers/pnp/pnpbios/bioscalls.c @@ -0,0 +1,490 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * bioscalls.c - the lowlevel layer of the PnPBIOS driver + */ + +#include <linux/types.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/linkage.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/pnp.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/kmod.h> +#include <linux/completion.h> +#include <linux/spinlock.h> + +#include <asm/page.h> +#include <asm/desc.h> +#include <asm/byteorder.h> + +#include "pnpbios.h" + +__visible struct { + u16 offset; + u16 segment; +} pnp_bios_callpoint; + +/* + * These are some opcodes for a "static asmlinkage" + * As this code is *not* executed inside the linux kernel segment, but in a + * alias at offset 0, we need a far return that can not be compiled by + * default (please, prove me wrong! this is *really* ugly!) + * This is the only way to get the bios to return into the kernel code, + * because the bios code runs in 16 bit protected mode and therefore can only + * return to the caller if the call is within the first 64kB, and the linux + * kernel begins at offset 3GB... + */ + +asmlinkage __visible void pnp_bios_callfunc(void); + +__asm__(".text \n" + __ALIGN_STR "\n" + ".globl pnp_bios_callfunc\n" + "pnp_bios_callfunc:\n" + " pushl %edx \n" + " pushl %ecx \n" + " pushl %ebx \n" + " pushl %eax \n" + " lcallw *pnp_bios_callpoint\n" + " addl $16, %esp \n" + " lret \n" + ".previous \n"); + +#define Q2_SET_SEL(cpu, selname, address, size) \ +do { \ + struct desc_struct *gdt = get_cpu_gdt_rw((cpu)); \ + set_desc_base(&gdt[(selname) >> 3], (u32)(address)); \ + set_desc_limit(&gdt[(selname) >> 3], (size) - 1); \ +} while(0) + +static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092, + (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1); + +/* + * At some point we want to use this stack frame pointer to unwind + * after PnP BIOS oopses. + */ + +__visible u32 pnp_bios_fault_esp; +__visible u32 pnp_bios_fault_eip; +__visible u32 pnp_bios_is_utter_crap = 0; + +static DEFINE_SPINLOCK(pnp_bios_lock); + +/* + * Support Functions + */ + +static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3, + u16 arg4, u16 arg5, u16 arg6, u16 arg7, + void *ts1_base, u32 ts1_size, + void *ts2_base, u32 ts2_size) +{ + unsigned long flags; + u16 status; + struct desc_struct save_desc_40; + int cpu; + + /* + * PnP BIOSes are generally not terribly re-entrant. + * Also, don't rely on them to save everything correctly. + */ + if (pnp_bios_is_utter_crap) + return PNP_FUNCTION_NOT_SUPPORTED; + + cpu = get_cpu(); + save_desc_40 = get_cpu_gdt_rw(cpu)[0x40 / 8]; + get_cpu_gdt_rw(cpu)[0x40 / 8] = bad_bios_desc; + + /* On some boxes IRQ's during PnP BIOS calls are deadly. */ + spin_lock_irqsave(&pnp_bios_lock, flags); + + /* The lock prevents us bouncing CPU here */ + if (ts1_size) + Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size); + if (ts2_size) + Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size); + + __asm__ __volatile__("pushl %%ebp\n\t" + "pushl %%edi\n\t" + "pushl %%esi\n\t" + "pushl %%ds\n\t" + "pushl %%es\n\t" + "pushl %%fs\n\t" + "pushl %%gs\n\t" + "pushfl\n\t" + "movl %%esp, pnp_bios_fault_esp\n\t" + "movl $1f, pnp_bios_fault_eip\n\t" + "lcall %5,%6\n\t" + "1:popfl\n\t" + "popl %%gs\n\t" + "popl %%fs\n\t" + "popl %%es\n\t" + "popl %%ds\n\t" + "popl %%esi\n\t" + "popl %%edi\n\t" + "popl %%ebp\n\t":"=a"(status) + :"0"((func) | (((u32) arg1) << 16)), + "b"((arg2) | (((u32) arg3) << 16)), + "c"((arg4) | (((u32) arg5) << 16)), + "d"((arg6) | (((u32) arg7) << 16)), + "i"(PNP_CS32), "i"(0) + :"memory"); + spin_unlock_irqrestore(&pnp_bios_lock, flags); + + get_cpu_gdt_rw(cpu)[0x40 / 8] = save_desc_40; + put_cpu(); + + /* If we get here and this is set then the PnP BIOS faulted on us. */ + if (pnp_bios_is_utter_crap) { + printk(KERN_ERR + "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n"); + printk(KERN_ERR + "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n"); + printk(KERN_ERR + "PnPBIOS: Check with your vendor for an updated BIOS\n"); + } + + return status; +} + +void pnpbios_print_status(const char *module, u16 status) +{ + switch (status) { + case PNP_SUCCESS: + printk(KERN_ERR "PnPBIOS: %s: function successful\n", module); + break; + case PNP_NOT_SET_STATICALLY: + printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", + module); + break; + case PNP_UNKNOWN_FUNCTION: + printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", + module); + break; + case PNP_FUNCTION_NOT_SUPPORTED: + printk(KERN_ERR + "PnPBIOS: %s: function not supported on this system\n", + module); + break; + case PNP_INVALID_HANDLE: + printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module); + break; + case PNP_BAD_PARAMETER: + printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", + module); + break; + case PNP_SET_FAILED: + printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", + module); + break; + case PNP_EVENTS_NOT_PENDING: + printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module); + break; + case PNP_SYSTEM_NOT_DOCKED: + printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", + module); + break; + case PNP_NO_ISA_PNP_CARDS: + printk(KERN_ERR + "PnPBIOS: %s: no isapnp cards are installed on this system\n", + module); + break; + case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES: + printk(KERN_ERR + "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", + module); + break; + case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY: + printk(KERN_ERR + "PnPBIOS: %s: unable to undock, the system does not have a battery\n", + module); + break; + case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT: + printk(KERN_ERR + "PnPBIOS: %s: could not dock due to resource conflicts\n", + module); + break; + case PNP_BUFFER_TOO_SMALL: + printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", + module); + break; + case PNP_USE_ESCD_SUPPORT: + printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module); + break; + case PNP_MESSAGE_NOT_SUPPORTED: + printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", + module); + break; + case PNP_HARDWARE_ERROR: + printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occurred\n", + module); + break; + default: + printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, + status); + break; + } +} + +/* + * PnP BIOS Low Level Calls + */ + +#define PNP_GET_NUM_SYS_DEV_NODES 0x00 +#define PNP_GET_SYS_DEV_NODE 0x01 +#define PNP_SET_SYS_DEV_NODE 0x02 +#define PNP_GET_EVENT 0x03 +#define PNP_SEND_MESSAGE 0x04 +#define PNP_GET_DOCKING_STATION_INFORMATION 0x05 +#define PNP_SET_STATIC_ALLOCED_RES_INFO 0x09 +#define PNP_GET_STATIC_ALLOCED_RES_INFO 0x0a +#define PNP_GET_APM_ID_TABLE 0x0b +#define PNP_GET_PNP_ISA_CONFIG_STRUC 0x40 +#define PNP_GET_ESCD_INFO 0x41 +#define PNP_READ_ESCD 0x42 +#define PNP_WRITE_ESCD 0x43 + +/* + * Call PnP BIOS with function 0x00, "get number of system device nodes" + */ +static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, + PNP_TS1, PNP_DS, 0, 0, data, + sizeof(struct pnp_dev_node_info), NULL, 0); + data->no_nodes &= 0xff; + return status; +} + +int pnp_bios_dev_node_info(struct pnp_dev_node_info *data) +{ + int status = __pnp_bios_dev_node_info(data); + + if (status) + pnpbios_print_status("dev_node_info", status); + return status; +} + +/* + * Note that some PnP BIOSes (e.g., on Sony Vaio laptops) die a horrible + * death if they are asked to access the "current" configuration. + * Therefore, if it's a matter of indifference, it's better to call + * get_dev_node() and set_dev_node() with boot=1 rather than with boot=0. + */ + +/* + * Call PnP BIOS with function 0x01, "get system device node" + * Input: *nodenum = desired node, + * boot = whether to get nonvolatile boot (!=0) + * or volatile current (0) config + * Output: *nodenum=next node or 0xff if no more nodes + */ +static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, + struct pnp_bios_node *data) +{ + u16 status; + u16 tmp_nodenum; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + if (!boot && pnpbios_dont_use_current_config) + return PNP_FUNCTION_NOT_SUPPORTED; + tmp_nodenum = *nodenum; + status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, + boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum, + sizeof(tmp_nodenum), data, 65536); + *nodenum = tmp_nodenum; + return status; +} + +int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data) +{ + int status; + + status = __pnp_bios_get_dev_node(nodenum, boot, data); + if (status) + pnpbios_print_status("get_dev_node", status); + return status; +} + +/* + * Call PnP BIOS with function 0x02, "set system device node" + * Input: *nodenum = desired node, + * boot = whether to set nonvolatile boot (!=0) + * or volatile current (0) config + */ +static int __pnp_bios_set_dev_node(u8 nodenum, char boot, + struct pnp_bios_node *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + if (!boot && pnpbios_dont_use_current_config) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, + boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL, + 0); + return status; +} + +int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data) +{ + int status; + + status = __pnp_bios_set_dev_node(nodenum, boot, data); + if (status) { + pnpbios_print_status("set_dev_node", status); + return status; + } + if (!boot) { /* Update devlist */ + status = pnp_bios_get_dev_node(&nodenum, boot, data); + if (status) + return status; + } + return status; +} + +/* + * Call PnP BIOS with function 0x05, "get docking station information" + */ +int pnp_bios_dock_station_info(struct pnp_docking_station_info *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, + PNP_DS, 0, 0, 0, 0, data, + sizeof(struct pnp_docking_station_info), NULL, + 0); + return status; +} + +/* + * Call PnP BIOS with function 0x0a, "get statically allocated resource + * information" + */ +static int __pnp_bios_get_stat_res(char *info) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, + PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0); + return status; +} + +int pnp_bios_get_stat_res(char *info) +{ + int status; + + status = __pnp_bios_get_stat_res(info); + if (status) + pnpbios_print_status("get_stat_res", status); + return status; +} + +/* + * Call PnP BIOS with function 0x40, "get isa pnp configuration structure" + */ +static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, + 0, 0, 0, 0, data, + sizeof(struct pnp_isa_config_struc), NULL, 0); + return status; +} + +int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data) +{ + int status; + + status = __pnp_bios_isapnp_config(data); + if (status) + pnpbios_print_status("isapnp_config", status); + return status; +} + +/* + * Call PnP BIOS with function 0x41, "get ESCD info" + */ +static int __pnp_bios_escd_info(struct escd_info_struc *data) +{ + u16 status; + + if (!pnp_bios_present()) + return ESCD_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, + PNP_TS1, PNP_DS, data, + sizeof(struct escd_info_struc), NULL, 0); + return status; +} + +int pnp_bios_escd_info(struct escd_info_struc *data) +{ + int status; + + status = __pnp_bios_escd_info(data); + if (status) + pnpbios_print_status("escd_info", status); + return status; +} + +/* + * Call PnP BIOS function 0x42, "read ESCD" + * nvram_base is determined by calling escd_info + */ +static int __pnp_bios_read_escd(char *data, u32 nvram_base) +{ + u16 status; + + if (!pnp_bios_present()) + return ESCD_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, + 0, data, 65536, __va(nvram_base), 65536); + return status; +} + +int pnp_bios_read_escd(char *data, u32 nvram_base) +{ + int status; + + status = __pnp_bios_read_escd(data, nvram_base); + if (status) + pnpbios_print_status("read_escd", status); + return status; +} + +void pnpbios_calls_init(union pnp_bios_install_struct *header) +{ + int i; + + pnp_bios_callpoint.offset = header->fields.pm16offset; + pnp_bios_callpoint.segment = PNP_CS16; + + for_each_possible_cpu(i) { + struct desc_struct *gdt = get_cpu_gdt_rw(i); + if (!gdt) + continue; + set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS32], + (unsigned long)&pnp_bios_callfunc); + set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS16], + (unsigned long)__va(header->fields.pm16cseg)); + set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_DS], + (unsigned long)__va(header->fields.pm16dseg)); + } +} diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c new file mode 100644 index 0000000000..f7e86ae9f7 --- /dev/null +++ b/drivers/pnp/pnpbios/core.c @@ -0,0 +1,575 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * pnpbios -- PnP BIOS driver + * + * This driver provides access to Plug-'n'-Play services provided by + * the PnP BIOS firmware, described in the following documents: + * Plug and Play BIOS Specification, Version 1.0A, 5 May 1994 + * Plug and Play BIOS Clarification Paper, 6 October 1994 + * Compaq Computer Corporation, Phoenix Technologies Ltd., Intel Corp. + * + * Originally (C) 1998 Christian Schmidt <schmidt@digadd.de> + * Modifications (C) 1998 Tom Lees <tom@lpsg.demon.co.uk> + * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net> + * Further modifications (C) 2001, 2002 by: + * Alan Cox <alan@redhat.com> + * Thomas Hood + * Brian Gerst <bgerst@didntduck.org> + * + * Ported to the PnP Layer and several additional improvements (C) 2002 + * by Adam Belay <ambx1@neo.rr.com> + */ + +/* Change Log + * + * Adam Belay - <ambx1@neo.rr.com> - March 16, 2003 + * rev 1.01 Only call pnp_bios_dev_node_info once + * Added pnpbios_print_status + * Added several new error messages and info messages + * Added pnpbios_interface_attach_device + * integrated core and proc init system + * Introduced PNPMODE flags + * Removed some useless includes + */ + +#include <linux/types.h> +#include <linux/init.h> +#include <linux/linkage.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/pnp.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/slab.h> +#include <linux/completion.h> +#include <linux/spinlock.h> +#include <linux/dmi.h> +#include <linux/delay.h> +#include <linux/acpi.h> +#include <linux/freezer.h> +#include <linux/kmod.h> +#include <linux/kthread.h> + +#include <asm/page.h> +#include <asm/desc.h> +#include <asm/byteorder.h> + +#include "../base.h" +#include "pnpbios.h" + +/* + * + * PnP BIOS INTERFACE + * + */ + +static union pnp_bios_install_struct *pnp_bios_install = NULL; + +int pnp_bios_present(void) +{ + return (pnp_bios_install != NULL); +} + +struct pnp_dev_node_info node_info; + +/* + * + * DOCKING FUNCTIONS + * + */ + +static struct completion unload_sem; + +/* + * (Much of this belongs in a shared routine somewhere) + */ +static int pnp_dock_event(int dock, struct pnp_docking_station_info *info) +{ + static char const sbin_pnpbios[] = "/sbin/pnpbios"; + char *argv[3], **envp, *buf, *scratch; + int i = 0, value; + + if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL))) + return -ENOMEM; + if (!(buf = kzalloc(256, GFP_KERNEL))) { + kfree(envp); + return -ENOMEM; + } + + /* FIXME: if there are actual users of this, it should be + * integrated into the driver core and use the usual infrastructure + * like sysfs and uevents + */ + argv[0] = (char *)sbin_pnpbios; + argv[1] = "dock"; + argv[2] = NULL; + + /* minimal command environment */ + envp[i++] = "HOME=/"; + envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; + +#ifdef DEBUG + /* hint that policy agent should enter no-stdout debug mode */ + envp[i++] = "DEBUG=kernel"; +#endif + /* extensible set of named bus-specific parameters, + * supporting multiple driver selection algorithms. + */ + scratch = buf; + + /* action: add, remove */ + envp[i++] = scratch; + scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1; + + /* Report the ident for the dock */ + envp[i++] = scratch; + scratch += sprintf(scratch, "DOCK=%x/%x/%x", + info->location_id, info->serial, info->capabilities); + envp[i] = NULL; + + value = call_usermodehelper(sbin_pnpbios, argv, envp, UMH_WAIT_EXEC); + kfree(buf); + kfree(envp); + return 0; +} + +/* + * Poll the PnP docking at regular intervals + */ +static int pnp_dock_thread(void *unused) +{ + static struct pnp_docking_station_info now; + int docked = -1, d = 0; + + set_freezable(); + while (1) { + int status; + + /* + * Poll every 2 seconds + */ + msleep_interruptible(2000); + + if (try_to_freeze()) + continue; + + status = pnp_bios_dock_station_info(&now); + + switch (status) { + /* + * No dock to manage + */ + case PNP_FUNCTION_NOT_SUPPORTED: + kthread_complete_and_exit(&unload_sem, 0); + case PNP_SYSTEM_NOT_DOCKED: + d = 0; + break; + case PNP_SUCCESS: + d = 1; + break; + default: + pnpbios_print_status("pnp_dock_thread", status); + printk(KERN_WARNING "PnPBIOS: disabling dock monitoring.\n"); + kthread_complete_and_exit(&unload_sem, 0); + } + if (d != docked) { + if (pnp_dock_event(d, &now) == 0) { + docked = d; +#if 0 + printk(KERN_INFO + "PnPBIOS: Docking station %stached\n", + docked ? "at" : "de"); +#endif + } + } + } + kthread_complete_and_exit(&unload_sem, 0); +} + +static int pnpbios_get_resources(struct pnp_dev *dev) +{ + u8 nodenum = dev->number; + struct pnp_bios_node *node; + + if (!pnpbios_is_dynamic(dev)) + return -EPERM; + + pnp_dbg(&dev->dev, "get resources\n"); + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -1; + if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { + kfree(node); + return -ENODEV; + } + pnpbios_read_resources_from_node(dev, node); + dev->active = pnp_is_active(dev); + kfree(node); + return 0; +} + +static int pnpbios_set_resources(struct pnp_dev *dev) +{ + u8 nodenum = dev->number; + struct pnp_bios_node *node; + int ret; + + if (!pnpbios_is_dynamic(dev)) + return -EPERM; + + pnp_dbg(&dev->dev, "set resources\n"); + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -1; + if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { + kfree(node); + return -ENODEV; + } + if (pnpbios_write_resources_to_node(dev, node) < 0) { + kfree(node); + return -1; + } + ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node); + kfree(node); + if (ret > 0) + ret = -1; + return ret; +} + +static void pnpbios_zero_data_stream(struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + unsigned int len; + int i; + + while ((char *)p < (char *)end) { + if (p[0] & 0x80) { /* large tag */ + len = (p[2] << 8) | p[1]; + p += 3; + } else { + if (((p[0] >> 3) & 0x0f) == 0x0f) + return; + len = p[0] & 0x07; + p += 1; + } + for (i = 0; i < len; i++) + p[i] = 0; + p += len; + } + printk(KERN_ERR + "PnPBIOS: Resource structure did not contain an end tag.\n"); +} + +static int pnpbios_disable_resources(struct pnp_dev *dev) +{ + struct pnp_bios_node *node; + u8 nodenum = dev->number; + int ret; + + if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev)) + return -EPERM; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + + if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { + kfree(node); + return -ENODEV; + } + pnpbios_zero_data_stream(node); + + ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node); + kfree(node); + if (ret > 0) + ret = -1; + return ret; +} + +/* PnP Layer support */ + +struct pnp_protocol pnpbios_protocol = { + .name = "Plug and Play BIOS", + .get = pnpbios_get_resources, + .set = pnpbios_set_resources, + .disable = pnpbios_disable_resources, +}; + +static int __init insert_device(struct pnp_bios_node *node) +{ + struct pnp_dev *dev; + char id[8]; + int error; + + /* check if the device is already added */ + list_for_each_entry(dev, &pnpbios_protocol.devices, protocol_list) { + if (dev->number == node->handle) + return -EEXIST; + } + + pnp_eisa_id_to_string(node->eisa_id & PNP_EISA_ID_MASK, id); + dev = pnp_alloc_dev(&pnpbios_protocol, node->handle, id); + if (!dev) + return -ENOMEM; + + pnpbios_parse_data_stream(dev, node); + dev->active = pnp_is_active(dev); + dev->flags = node->flags; + if (!(dev->flags & PNPBIOS_NO_CONFIG)) + dev->capabilities |= PNP_CONFIGURABLE; + if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev)) + dev->capabilities |= PNP_DISABLE; + dev->capabilities |= PNP_READ; + if (pnpbios_is_dynamic(dev)) + dev->capabilities |= PNP_WRITE; + if (dev->flags & PNPBIOS_REMOVABLE) + dev->capabilities |= PNP_REMOVABLE; + + /* clear out the damaged flags */ + if (!dev->active) + pnp_init_resources(dev); + + error = pnp_add_device(dev); + if (error) { + put_device(&dev->dev); + return error; + } + + pnpbios_interface_attach_device(node); + + return 0; +} + +static void __init build_devlist(void) +{ + u8 nodenum; + unsigned int nodes_got = 0; + unsigned int devs = 0; + struct pnp_bios_node *node; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return; + + for (nodenum = 0; nodenum < 0xff;) { + u8 thisnodenum = nodenum; + /* eventually we will want to use PNPMODE_STATIC here but for now + * dynamic will help us catch buggy bioses to add to the blacklist. + */ + if (!pnpbios_dont_use_current_config) { + if (pnp_bios_get_dev_node + (&nodenum, (char)PNPMODE_DYNAMIC, node)) + break; + } else { + if (pnp_bios_get_dev_node + (&nodenum, (char)PNPMODE_STATIC, node)) + break; + } + nodes_got++; + if (insert_device(node) == 0) + devs++; + if (nodenum <= thisnodenum) { + printk(KERN_ERR + "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", + (unsigned int)nodenum, + (unsigned int)thisnodenum); + break; + } + } + kfree(node); + + printk(KERN_INFO + "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n", + nodes_got, nodes_got != 1 ? "s" : "", devs); +} + +/* + * + * INIT AND EXIT + * + */ + +static int pnpbios_disabled; +int pnpbios_dont_use_current_config; + +static int __init pnpbios_setup(char *str) +{ + int invert; + + while ((str != NULL) && (*str != '\0')) { + if (strncmp(str, "off", 3) == 0) + pnpbios_disabled = 1; + if (strncmp(str, "on", 2) == 0) + pnpbios_disabled = 0; + invert = (strncmp(str, "no-", 3) == 0); + if (invert) + str += 3; + if (strncmp(str, "curr", 4) == 0) + pnpbios_dont_use_current_config = invert; + str = strchr(str, ','); + if (str != NULL) + str += strspn(str, ", \t"); + } + + return 1; +} + +__setup("pnpbios=", pnpbios_setup); + +/* PnP BIOS signature: "$PnP" */ +#define PNP_SIGNATURE (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24)) + +static int __init pnpbios_probe_system(void) +{ + union pnp_bios_install_struct *check; + u8 sum; + int length, i; + + printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n"); + + /* + * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS + * structure and, if one is found, sets up the selectors and + * entry points + */ + for (check = (union pnp_bios_install_struct *)__va(0xf0000); + check < (union pnp_bios_install_struct *)__va(0xffff0); + check = (void *)check + 16) { + if (check->fields.signature != PNP_SIGNATURE) + continue; + printk(KERN_INFO + "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", + check); + length = check->fields.length; + if (!length) { + printk(KERN_ERR + "PnPBIOS: installation structure is invalid, skipping\n"); + continue; + } + for (sum = 0, i = 0; i < length; i++) + sum += check->chars[i]; + if (sum) { + printk(KERN_ERR + "PnPBIOS: installation structure is corrupted, skipping\n"); + continue; + } + if (check->fields.version < 0x10) { + printk(KERN_WARNING + "PnPBIOS: PnP BIOS version %d.%d is not supported\n", + check->fields.version >> 4, + check->fields.version & 15); + continue; + } + printk(KERN_INFO + "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n", + check->fields.version >> 4, check->fields.version & 15, + check->fields.pm16cseg, check->fields.pm16offset, + check->fields.pm16dseg); + pnp_bios_install = check; + return 1; + } + + printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n"); + return 0; +} + +static int __init exploding_pnp_bios(const struct dmi_system_id *d) +{ + printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident); + return 0; +} + +static const struct dmi_system_id pnpbios_dmi_table[] __initconst = { + { /* PnPBIOS GPF on boot */ + .callback = exploding_pnp_bios, + .ident = "Higraded P14H", + .matches = { + DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), + DMI_MATCH(DMI_BIOS_VERSION, "07.00T"), + DMI_MATCH(DMI_SYS_VENDOR, "Higraded"), + DMI_MATCH(DMI_PRODUCT_NAME, "P14H"), + }, + }, + { /* PnPBIOS GPF on boot */ + .callback = exploding_pnp_bios, + .ident = "ASUS P4P800", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."), + DMI_MATCH(DMI_BOARD_NAME, "P4P800"), + }, + }, + {} +}; + +static int __init pnpbios_init(void) +{ + int ret; + + if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table) || + arch_pnpbios_disabled()) { + printk(KERN_INFO "PnPBIOS: Disabled\n"); + return -ENODEV; + } + +#ifdef CONFIG_PNPACPI + if (!acpi_disabled && !pnpacpi_disabled) { + pnpbios_disabled = 1; + printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n"); + return -ENODEV; + } +#endif /* CONFIG_ACPI */ + + /* scan the system for pnpbios support */ + if (!pnpbios_probe_system()) + return -ENODEV; + + /* make preparations for bios calls */ + pnpbios_calls_init(pnp_bios_install); + + /* read the node info */ + ret = pnp_bios_dev_node_info(&node_info); + if (ret) { + printk(KERN_ERR + "PnPBIOS: Unable to get node info. Aborting.\n"); + return ret; + } + + /* register with the pnp layer */ + ret = pnp_register_protocol(&pnpbios_protocol); + if (ret) { + printk(KERN_ERR + "PnPBIOS: Unable to register driver. Aborting.\n"); + return ret; + } + + /* start the proc interface */ + ret = pnpbios_proc_init(); + if (ret) + printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n"); + + /* scan for pnpbios devices */ + build_devlist(); + + pnp_platform_devices = 1; + return 0; +} + +fs_initcall(pnpbios_init); + +static int __init pnpbios_thread_init(void) +{ + struct task_struct *task; + + if (pnpbios_disabled) + return 0; + + init_completion(&unload_sem); + task = kthread_run(pnp_dock_thread, NULL, "kpnpbiosd"); + return PTR_ERR_OR_ZERO(task); +} + +/* Start the kernel thread later: */ +device_initcall(pnpbios_thread_init); + +EXPORT_SYMBOL(pnpbios_protocol); diff --git a/drivers/pnp/pnpbios/pnpbios.h b/drivers/pnp/pnpbios/pnpbios.h new file mode 100644 index 0000000000..f330200684 --- /dev/null +++ b/drivers/pnp/pnpbios/pnpbios.h @@ -0,0 +1,168 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * pnpbios.h - contains local definitions + */ + +/* + * Include file for the interface to a PnP BIOS + * + * Original BIOS code (C) 1998 Christian Schmidt (chr.schmidt@tu-bs.de) + * PnP handler parts (c) 1998 Tom Lees <tom@lpsg.demon.co.uk> + * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net> + */ + +/* + * Return codes + */ +#define PNP_SUCCESS 0x00 +#define PNP_NOT_SET_STATICALLY 0x7f +#define PNP_UNKNOWN_FUNCTION 0x81 +#define PNP_FUNCTION_NOT_SUPPORTED 0x82 +#define PNP_INVALID_HANDLE 0x83 +#define PNP_BAD_PARAMETER 0x84 +#define PNP_SET_FAILED 0x85 +#define PNP_EVENTS_NOT_PENDING 0x86 +#define PNP_SYSTEM_NOT_DOCKED 0x87 +#define PNP_NO_ISA_PNP_CARDS 0x88 +#define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89 +#define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a +#define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b +#define PNP_BUFFER_TOO_SMALL 0x8c +#define PNP_USE_ESCD_SUPPORT 0x8d +#define PNP_MESSAGE_NOT_SUPPORTED 0x8e +#define PNP_HARDWARE_ERROR 0x8f + +#define ESCD_SUCCESS 0x00 +#define ESCD_IO_ERROR_READING 0x55 +#define ESCD_INVALID 0x56 +#define ESCD_BUFFER_TOO_SMALL 0x59 +#define ESCD_NVRAM_TOO_SMALL 0x5a +#define ESCD_FUNCTION_NOT_SUPPORTED 0x81 + +/* + * Events that can be received by "get event" + */ +#define PNPEV_ABOUT_TO_CHANGE_CONFIG 0x0001 +#define PNPEV_DOCK_CHANGED 0x0002 +#define PNPEV_SYSTEM_DEVICE_CHANGED 0x0003 +#define PNPEV_CONFIG_CHANGED_FAILED 0x0004 +#define PNPEV_UNKNOWN_SYSTEM_EVENT 0xffff +/* 0x8000 through 0xfffe are OEM defined */ + +/* + * Messages that should be sent through "send message" + */ +#define PNPMSG_OK 0x00 +#define PNPMSG_ABORT 0x01 +#define PNPMSG_UNDOCK_DEFAULT_ACTION 0x40 +#define PNPMSG_POWER_OFF 0x41 +#define PNPMSG_PNP_OS_ACTIVE 0x42 +#define PNPMSG_PNP_OS_INACTIVE 0x43 + +/* + * Plug and Play BIOS flags + */ +#define PNPBIOS_NO_DISABLE 0x0001 +#define PNPBIOS_NO_CONFIG 0x0002 +#define PNPBIOS_OUTPUT 0x0004 +#define PNPBIOS_INPUT 0x0008 +#define PNPBIOS_BOOTABLE 0x0010 +#define PNPBIOS_DOCK 0x0020 +#define PNPBIOS_REMOVABLE 0x0040 +#define pnpbios_is_static(x) (((x)->flags & 0x0100) == 0x0000) +#define pnpbios_is_dynamic(x) ((x)->flags & 0x0080) + +/* + * Function Parameters + */ +#define PNPMODE_STATIC 1 +#define PNPMODE_DYNAMIC 0 + +/* 0x8000 through 0xffff are OEM defined */ + +#pragma pack(1) +struct pnp_dev_node_info { + __u16 no_nodes; + __u16 max_node_size; +}; +struct pnp_docking_station_info { + __u32 location_id; + __u32 serial; + __u16 capabilities; +}; +struct pnp_isa_config_struc { + __u8 revision; + __u8 no_csns; + __u16 isa_rd_data_port; + __u16 reserved; +}; +struct escd_info_struc { + __u16 min_escd_write_size; + __u16 escd_size; + __u32 nv_storage_base; +}; +struct pnp_bios_node { + __u16 size; + __u8 handle; + __u32 eisa_id; + __u8 type_code[3]; + __u16 flags; + __u8 data[]; +}; +#pragma pack() + +/* non-exported */ +extern struct pnp_dev_node_info node_info; + +extern int pnp_bios_dev_node_info(struct pnp_dev_node_info *data); +extern int pnp_bios_get_dev_node(u8 *nodenum, char config, + struct pnp_bios_node *data); +extern int pnp_bios_set_dev_node(u8 nodenum, char config, + struct pnp_bios_node *data); +extern int pnp_bios_get_stat_res(char *info); +extern int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data); +extern int pnp_bios_escd_info(struct escd_info_struc *data); +extern int pnp_bios_read_escd(char *data, u32 nvram_base); +extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data); + +#pragma pack(1) +union pnp_bios_install_struct { + struct { + u32 signature; /* "$PnP" */ + u8 version; /* in BCD */ + u8 length; /* length in bytes, currently 21h */ + u16 control; /* system capabilities */ + u8 checksum; /* all bytes must add up to 0 */ + + u32 eventflag; /* phys. address of the event flag */ + u16 rmoffset; /* real mode entry point */ + u16 rmcseg; + u16 pm16offset; /* 16 bit protected mode entry */ + u32 pm16cseg; + u32 deviceID; /* EISA encoded system ID or 0 */ + u16 rmdseg; /* real mode data segment */ + u32 pm16dseg; /* 16 bit pm data segment base */ + } fields; + char chars[0x21]; /* To calculate the checksum */ +}; +#pragma pack() + +extern int pnp_bios_present(void); +extern int pnpbios_dont_use_current_config; + +extern int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node); +extern int pnpbios_read_resources_from_node(struct pnp_dev *dev, struct pnp_bios_node *node); +extern int pnpbios_write_resources_to_node(struct pnp_dev *dev, struct pnp_bios_node *node); + +extern void pnpbios_print_status(const char * module, u16 status); +extern void pnpbios_calls_init(union pnp_bios_install_struct * header); + +#ifdef CONFIG_PNPBIOS_PROC_FS +extern int pnpbios_interface_attach_device(struct pnp_bios_node * node); +extern int pnpbios_proc_init (void); +extern void pnpbios_proc_exit (void); +#else +static inline int pnpbios_interface_attach_device(struct pnp_bios_node * node) { return 0; } +static inline int pnpbios_proc_init (void) { return 0; } +static inline void pnpbios_proc_exit (void) { ; } +#endif /* CONFIG_PNPBIOS_PROC_FS */ diff --git a/drivers/pnp/pnpbios/proc.c b/drivers/pnp/pnpbios/proc.c new file mode 100644 index 0000000000..0f0d819b15 --- /dev/null +++ b/drivers/pnp/pnpbios/proc.c @@ -0,0 +1,286 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * /proc/bus/pnp interface for Plug and Play devices + * + * Written by David Hinds, dahinds@users.sourceforge.net + * Modified by Thomas Hood + * + * The .../devices and .../<node> and .../boot/<node> files are + * utilized by the lspnp and setpnp utilities, supplied with the + * pcmcia-cs package. + * http://pcmcia-cs.sourceforge.net + * + * The .../escd file is utilized by the lsescd utility written by + * Gunther Mayer. + * + * The .../legacy_device_resources file is not used yet. + * + * The other files are human-readable. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/proc_fs.h> +#include <linux/pnp.h> +#include <linux/seq_file.h> +#include <linux/init.h> + +#include <linux/uaccess.h> + +#include "pnpbios.h" + +static struct proc_dir_entry *proc_pnp = NULL; +static struct proc_dir_entry *proc_pnp_boot = NULL; + +static int pnpconfig_proc_show(struct seq_file *m, void *v) +{ + struct pnp_isa_config_struc pnps; + + if (pnp_bios_isapnp_config(&pnps)) + return -EIO; + seq_printf(m, "structure_revision %d\n" + "number_of_CSNs %d\n" + "ISA_read_data_port 0x%x\n", + pnps.revision, pnps.no_csns, pnps.isa_rd_data_port); + return 0; +} + +static int escd_info_proc_show(struct seq_file *m, void *v) +{ + struct escd_info_struc escd; + + if (pnp_bios_escd_info(&escd)) + return -EIO; + seq_printf(m, "min_ESCD_write_size %d\n" + "ESCD_size %d\n" + "NVRAM_base 0x%x\n", + escd.min_escd_write_size, + escd.escd_size, escd.nv_storage_base); + return 0; +} + +#define MAX_SANE_ESCD_SIZE (32*1024) +static int escd_proc_show(struct seq_file *m, void *v) +{ + struct escd_info_struc escd; + char *tmpbuf; + int escd_size; + + if (pnp_bios_escd_info(&escd)) + return -EIO; + + /* sanity check */ + if (escd.escd_size > MAX_SANE_ESCD_SIZE) { + printk(KERN_ERR + "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__); + return -EFBIG; + } + + tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL); + if (!tmpbuf) + return -ENOMEM; + + if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) { + kfree(tmpbuf); + return -EIO; + } + + escd_size = + (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256; + + /* sanity check */ + if (escd_size > MAX_SANE_ESCD_SIZE) { + printk(KERN_ERR "PnPBIOS: %s: ESCD size reported by" + " BIOS read_escd call is too great\n", __func__); + kfree(tmpbuf); + return -EFBIG; + } + + seq_write(m, tmpbuf, escd_size); + kfree(tmpbuf); + return 0; +} + +static int pnp_legacyres_proc_show(struct seq_file *m, void *v) +{ + void *buf; + + buf = kmalloc(65536, GFP_KERNEL); + if (!buf) + return -ENOMEM; + if (pnp_bios_get_stat_res(buf)) { + kfree(buf); + return -EIO; + } + + seq_write(m, buf, 65536); + kfree(buf); + return 0; +} + +static int pnp_devices_proc_show(struct seq_file *m, void *v) +{ + struct pnp_bios_node *node; + u8 nodenum; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + + for (nodenum = 0; nodenum < 0xff;) { + u8 thisnodenum = nodenum; + + if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node)) + break; + seq_printf(m, "%02x\t%08x\t%3phC\t%04x\n", + node->handle, node->eisa_id, + node->type_code, node->flags); + if (nodenum <= thisnodenum) { + printk(KERN_ERR + "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", + "PnPBIOS: proc_read_devices:", + (unsigned int)nodenum, + (unsigned int)thisnodenum); + break; + } + } + kfree(node); + return 0; +} + +static int pnpbios_proc_show(struct seq_file *m, void *v) +{ + void *data = m->private; + struct pnp_bios_node *node; + int boot = (long)data >> 8; + u8 nodenum = (long)data; + int len; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + if (pnp_bios_get_dev_node(&nodenum, boot, node)) { + kfree(node); + return -EIO; + } + len = node->size - sizeof(struct pnp_bios_node); + seq_write(m, node->data, len); + kfree(node); + return 0; +} + +static int pnpbios_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, pnpbios_proc_show, pde_data(inode)); +} + +static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf, + size_t count, loff_t *pos) +{ + void *data = pde_data(file_inode(file)); + struct pnp_bios_node *node; + int boot = (long)data >> 8; + u8 nodenum = (long)data; + int ret = count; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + if (pnp_bios_get_dev_node(&nodenum, boot, node)) { + ret = -EIO; + goto out; + } + if (count != node->size - sizeof(struct pnp_bios_node)) { + ret = -EINVAL; + goto out; + } + if (copy_from_user(node->data, buf, count)) { + ret = -EFAULT; + goto out; + } + if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) { + ret = -EINVAL; + goto out; + } + ret = count; +out: + kfree(node); + return ret; +} + +static const struct proc_ops pnpbios_proc_ops = { + .proc_open = pnpbios_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = pnpbios_proc_write, +}; + +int pnpbios_interface_attach_device(struct pnp_bios_node *node) +{ + char name[3]; + + sprintf(name, "%02x", node->handle); + + if (!proc_pnp) + return -EIO; + if (!pnpbios_dont_use_current_config) { + proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_ops, + (void *)(long)(node->handle)); + } + + if (!proc_pnp_boot) + return -EIO; + if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_ops, + (void *)(long)(node->handle + 0x100))) + return 0; + return -EIO; +} + +/* + * When this is called, pnpbios functions are assumed to + * work and the pnpbios_dont_use_current_config flag + * should already have been set to the appropriate value + */ +int __init pnpbios_proc_init(void) +{ + proc_pnp = proc_mkdir("bus/pnp", NULL); + if (!proc_pnp) + return -EIO; + proc_pnp_boot = proc_mkdir("boot", proc_pnp); + if (!proc_pnp_boot) + return -EIO; + proc_create_single("devices", 0, proc_pnp, pnp_devices_proc_show); + proc_create_single("configuration_info", 0, proc_pnp, + pnpconfig_proc_show); + proc_create_single("escd_info", 0, proc_pnp, escd_info_proc_show); + proc_create_single("escd", S_IRUSR, proc_pnp, escd_proc_show); + proc_create_single("legacy_device_resources", 0, proc_pnp, + pnp_legacyres_proc_show); + return 0; +} + +void __exit pnpbios_proc_exit(void) +{ + int i; + char name[3]; + + if (!proc_pnp) + return; + + for (i = 0; i < 0xff; i++) { + sprintf(name, "%02x", i); + if (!pnpbios_dont_use_current_config) + remove_proc_entry(name, proc_pnp); + remove_proc_entry(name, proc_pnp_boot); + } + remove_proc_entry("legacy_device_resources", proc_pnp); + remove_proc_entry("escd", proc_pnp); + remove_proc_entry("escd_info", proc_pnp); + remove_proc_entry("configuration_info", proc_pnp); + remove_proc_entry("devices", proc_pnp); + remove_proc_entry("boot", proc_pnp); + remove_proc_entry("bus/pnp", NULL); +} diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c new file mode 100644 index 0000000000..2f31b212b1 --- /dev/null +++ b/drivers/pnp/pnpbios/rsparser.c @@ -0,0 +1,810 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * rsparser.c - parses and encodes pnpbios resource data streams + */ + +#include <linux/ctype.h> +#include <linux/pnp.h> +#include <linux/string.h> + +#ifdef CONFIG_PCI +#include <linux/pci.h> +#else +inline void pcibios_penalize_isa_irq(int irq, int active) +{ +} +#endif /* CONFIG_PCI */ + +#include "../base.h" +#include "pnpbios.h" + +/* standard resource tags */ +#define SMALL_TAG_PNPVERNO 0x01 +#define SMALL_TAG_LOGDEVID 0x02 +#define SMALL_TAG_COMPATDEVID 0x03 +#define SMALL_TAG_IRQ 0x04 +#define SMALL_TAG_DMA 0x05 +#define SMALL_TAG_STARTDEP 0x06 +#define SMALL_TAG_ENDDEP 0x07 +#define SMALL_TAG_PORT 0x08 +#define SMALL_TAG_FIXEDPORT 0x09 +#define SMALL_TAG_VENDOR 0x0e +#define SMALL_TAG_END 0x0f +#define LARGE_TAG 0x80 +#define LARGE_TAG_MEM 0x81 +#define LARGE_TAG_ANSISTR 0x82 +#define LARGE_TAG_UNICODESTR 0x83 +#define LARGE_TAG_VENDOR 0x84 +#define LARGE_TAG_MEM32 0x85 +#define LARGE_TAG_FIXEDMEM32 0x86 + +/* + * Resource Data Stream Format: + * + * Allocated Resources (required) + * end tag -> + * Resource Configuration Options (optional) + * end tag -> + * Compitable Device IDs (optional) + * final end tag -> + */ + +/* + * Allocated Resources + */ + +static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev, + int start, int len) +{ + int flags = 0; + int end = start + len - 1; + + if (len <= 0 || end >= 0x10003) + flags |= IORESOURCE_DISABLED; + + pnp_add_io_resource(dev, start, end, flags); +} + +static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev, + int start, int len) +{ + int flags = 0; + int end = start + len - 1; + + if (len <= 0) + flags |= IORESOURCE_DISABLED; + + pnp_add_mem_resource(dev, start, end, flags); +} + +static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev, + unsigned char *p, + unsigned char *end) +{ + unsigned int len, tag; + int io, size, mask, i, flags; + + if (!p) + return NULL; + + pnp_dbg(&dev->dev, "parse allocated resources\n"); + + pnp_init_resources(dev); + + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_MEM: + if (len != 9) + goto len_err; + io = *(short *)&p[4]; + size = *(short *)&p[10]; + pnpbios_parse_allocated_memresource(dev, io, size); + break; + + case LARGE_TAG_ANSISTR: + /* ignore this for now */ + break; + + case LARGE_TAG_VENDOR: + /* do nothing */ + break; + + case LARGE_TAG_MEM32: + if (len != 17) + goto len_err; + io = *(int *)&p[4]; + size = *(int *)&p[16]; + pnpbios_parse_allocated_memresource(dev, io, size); + break; + + case LARGE_TAG_FIXEDMEM32: + if (len != 9) + goto len_err; + io = *(int *)&p[4]; + size = *(int *)&p[8]; + pnpbios_parse_allocated_memresource(dev, io, size); + break; + + case SMALL_TAG_IRQ: + if (len < 2 || len > 3) + goto len_err; + flags = 0; + io = -1; + mask = p[1] + p[2] * 256; + for (i = 0; i < 16; i++, mask = mask >> 1) + if (mask & 0x01) + io = i; + if (io != -1) + pcibios_penalize_isa_irq(io, 1); + else + flags = IORESOURCE_DISABLED; + pnp_add_irq_resource(dev, io, flags); + break; + + case SMALL_TAG_DMA: + if (len != 2) + goto len_err; + flags = 0; + io = -1; + mask = p[1]; + for (i = 0; i < 8; i++, mask = mask >> 1) + if (mask & 0x01) + io = i; + if (io == -1) + flags = IORESOURCE_DISABLED; + pnp_add_dma_resource(dev, io, flags); + break; + + case SMALL_TAG_PORT: + if (len != 7) + goto len_err; + io = p[2] + p[3] * 256; + size = p[7]; + pnpbios_parse_allocated_ioresource(dev, io, size); + break; + + case SMALL_TAG_VENDOR: + /* do nothing */ + break; + + case SMALL_TAG_FIXEDPORT: + if (len != 3) + goto len_err; + io = p[1] + p[2] * 256; + size = p[3]; + pnpbios_parse_allocated_ioresource(dev, io, size); + break; + + case SMALL_TAG_END: + p = p + 2; + return (unsigned char *)p; + break; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Resource Configuration Options + */ + +static __init void pnpbios_parse_mem_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t min, max, align, len; + unsigned char flags; + + min = ((p[5] << 8) | p[4]) << 8; + max = ((p[7] << 8) | p[6]) << 8; + align = (p[9] << 8) | p[8]; + len = ((p[11] << 8) | p[10]) << 8; + flags = p[3]; + pnp_register_mem_resource(dev, option_flags, min, max, align, len, + flags); +} + +static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t min, max, align, len; + unsigned char flags; + + min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; + max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; + align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12]; + len = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16]; + flags = p[3]; + pnp_register_mem_resource(dev, option_flags, min, max, align, len, + flags); +} + +static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t base, len; + unsigned char flags; + + base = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; + len = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; + flags = p[3]; + pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); +} + +static __init void pnpbios_parse_irq_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + unsigned long bits; + pnp_irq_mask_t map; + unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; + + bits = (p[2] << 8) | p[1]; + + bitmap_zero(map.bits, PNP_IRQ_NR); + bitmap_copy(map.bits, &bits, 16); + + if (size > 2) + flags = p[3]; + + pnp_register_irq_resource(dev, option_flags, &map, flags); +} + +static __init void pnpbios_parse_dma_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + pnp_register_dma_resource(dev, option_flags, p[1], p[2]); +} + +static __init void pnpbios_parse_port_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t min, max, align, len; + unsigned char flags; + + min = (p[3] << 8) | p[2]; + max = (p[5] << 8) | p[4]; + align = p[6]; + len = p[7]; + flags = p[1] ? IORESOURCE_IO_16BIT_ADDR : 0; + pnp_register_port_resource(dev, option_flags, min, max, align, len, + flags); +} + +static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t base, len; + + base = (p[2] << 8) | p[1]; + len = p[3]; + pnp_register_port_resource(dev, option_flags, base, base, 0, len, + IORESOURCE_IO_FIXED); +} + +static __init unsigned char * +pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end, + struct pnp_dev *dev) +{ + unsigned int len, tag; + int priority; + unsigned int option_flags; + + if (!p) + return NULL; + + pnp_dbg(&dev->dev, "parse resource options\n"); + option_flags = 0; + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_MEM: + if (len != 9) + goto len_err; + pnpbios_parse_mem_option(dev, p, len, option_flags); + break; + + case LARGE_TAG_MEM32: + if (len != 17) + goto len_err; + pnpbios_parse_mem32_option(dev, p, len, option_flags); + break; + + case LARGE_TAG_FIXEDMEM32: + if (len != 9) + goto len_err; + pnpbios_parse_fixed_mem32_option(dev, p, len, + option_flags); + break; + + case SMALL_TAG_IRQ: + if (len < 2 || len > 3) + goto len_err; + pnpbios_parse_irq_option(dev, p, len, option_flags); + break; + + case SMALL_TAG_DMA: + if (len != 2) + goto len_err; + pnpbios_parse_dma_option(dev, p, len, option_flags); + break; + + case SMALL_TAG_PORT: + if (len != 7) + goto len_err; + pnpbios_parse_port_option(dev, p, len, option_flags); + break; + + case SMALL_TAG_VENDOR: + /* do nothing */ + break; + + case SMALL_TAG_FIXEDPORT: + if (len != 3) + goto len_err; + pnpbios_parse_fixed_port_option(dev, p, len, + option_flags); + break; + + case SMALL_TAG_STARTDEP: + if (len > 1) + goto len_err; + priority = PNP_RES_PRIORITY_ACCEPTABLE; + if (len > 0) + priority = p[1]; + option_flags = pnp_new_dependent_set(dev, priority); + break; + + case SMALL_TAG_ENDDEP: + if (len != 0) + goto len_err; + option_flags = 0; + break; + + case SMALL_TAG_END: + return p + 2; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Compatible Device IDs + */ + +static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p, + unsigned char *end, + struct pnp_dev *dev) +{ + int len, tag; + u32 eisa_id; + char id[8]; + struct pnp_id *dev_id; + + if (!p) + return NULL; + + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_ANSISTR: + strncpy(dev->name, p + 3, + len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len); + dev->name[len >= + PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0'; + break; + + case SMALL_TAG_COMPATDEVID: /* compatible ID */ + if (len != 4) + goto len_err; + eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24; + pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id); + dev_id = pnp_add_id(dev, id); + if (!dev_id) + return NULL; + break; + + case SMALL_TAG_END: + p = p + 2; + return (unsigned char *)p; + break; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Allocated Resource Encoding + */ + +static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[4] = (base >> 8) & 0xff; + p[5] = ((base >> 8) >> 8) & 0xff; + p[6] = (base >> 8) & 0xff; + p[7] = ((base >> 8) >> 8) & 0xff; + p[10] = (len >> 8) & 0xff; + p[11] = ((len >> 8) >> 8) & 0xff; + + pnp_dbg(&dev->dev, " encode mem %#lx-%#lx\n", base, base + len - 1); +} + +static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[4] = base & 0xff; + p[5] = (base >> 8) & 0xff; + p[6] = (base >> 16) & 0xff; + p[7] = (base >> 24) & 0xff; + p[8] = base & 0xff; + p[9] = (base >> 8) & 0xff; + p[10] = (base >> 16) & 0xff; + p[11] = (base >> 24) & 0xff; + p[16] = len & 0xff; + p[17] = (len >> 8) & 0xff; + p[18] = (len >> 16) & 0xff; + p[19] = (len >> 24) & 0xff; + + pnp_dbg(&dev->dev, " encode mem32 %#lx-%#lx\n", base, base + len - 1); +} + +static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[4] = base & 0xff; + p[5] = (base >> 8) & 0xff; + p[6] = (base >> 16) & 0xff; + p[7] = (base >> 24) & 0xff; + p[8] = len & 0xff; + p[9] = (len >> 8) & 0xff; + p[10] = (len >> 16) & 0xff; + p[11] = (len >> 24) & 0xff; + + pnp_dbg(&dev->dev, " encode fixed_mem32 %#lx-%#lx\n", base, + base + len - 1); +} + +static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long map; + + if (pnp_resource_enabled(res)) + map = 1 << res->start; + else + map = 0; + + p[1] = map & 0xff; + p[2] = (map >> 8) & 0xff; + + pnp_dbg(&dev->dev, " encode irq mask %#lx\n", map); +} + +static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long map; + + if (pnp_resource_enabled(res)) + map = 1 << res->start; + else + map = 0; + + p[1] = map & 0xff; + + pnp_dbg(&dev->dev, " encode dma mask %#lx\n", map); +} + +static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[2] = base & 0xff; + p[3] = (base >> 8) & 0xff; + p[4] = base & 0xff; + p[5] = (base >> 8) & 0xff; + p[7] = len & 0xff; + + pnp_dbg(&dev->dev, " encode io %#lx-%#lx\n", base, base + len - 1); +} + +static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base = res->start; + unsigned long len = resource_size(res); + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[1] = base & 0xff; + p[2] = (base >> 8) & 0xff; + p[3] = len & 0xff; + + pnp_dbg(&dev->dev, " encode fixed_io %#lx-%#lx\n", base, + base + len - 1); +} + +static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev + *dev, + unsigned char *p, + unsigned char *end) +{ + unsigned int len, tag; + int port = 0, irq = 0, dma = 0, mem = 0; + + if (!p) + return NULL; + + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_MEM: + if (len != 9) + goto len_err; + pnpbios_encode_mem(dev, p, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + + case LARGE_TAG_MEM32: + if (len != 17) + goto len_err; + pnpbios_encode_mem32(dev, p, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + + case LARGE_TAG_FIXEDMEM32: + if (len != 9) + goto len_err; + pnpbios_encode_fixed_mem32(dev, p, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + + case SMALL_TAG_IRQ: + if (len < 2 || len > 3) + goto len_err; + pnpbios_encode_irq(dev, p, + pnp_get_resource(dev, IORESOURCE_IRQ, irq)); + irq++; + break; + + case SMALL_TAG_DMA: + if (len != 2) + goto len_err; + pnpbios_encode_dma(dev, p, + pnp_get_resource(dev, IORESOURCE_DMA, dma)); + dma++; + break; + + case SMALL_TAG_PORT: + if (len != 7) + goto len_err; + pnpbios_encode_port(dev, p, + pnp_get_resource(dev, IORESOURCE_IO, port)); + port++; + break; + + case SMALL_TAG_VENDOR: + /* do nothing */ + break; + + case SMALL_TAG_FIXEDPORT: + if (len != 3) + goto len_err; + pnpbios_encode_fixed_port(dev, p, + pnp_get_resource(dev, IORESOURCE_IO, port)); + port++; + break; + + case SMALL_TAG_END: + p = p + 2; + return (unsigned char *)p; + break; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Core Parsing Functions + */ + +int __init pnpbios_parse_data_stream(struct pnp_dev *dev, + struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + + p = pnpbios_parse_allocated_resource_data(dev, p, end); + if (!p) + return -EIO; + p = pnpbios_parse_resource_option_data(p, end, dev); + if (!p) + return -EIO; + p = pnpbios_parse_compatible_ids(p, end, dev); + if (!p) + return -EIO; + return 0; +} + +int pnpbios_read_resources_from_node(struct pnp_dev *dev, + struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + + p = pnpbios_parse_allocated_resource_data(dev, p, end); + if (!p) + return -EIO; + return 0; +} + +int pnpbios_write_resources_to_node(struct pnp_dev *dev, + struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + + p = pnpbios_encode_allocated_resource_data(dev, p, end); + if (!p) + return -EIO; + return 0; +} diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c new file mode 100644 index 0000000000..6085a1471d --- /dev/null +++ b/drivers/pnp/quirks.c @@ -0,0 +1,454 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * This file contains quirk handling code for PnP devices + * Some devices do not report all their resources, and need to have extra + * resources added. This is most easily accomplished at initialisation time + * when building up the resource structure for the first time. + * + * Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk> + * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + * + * Heavily based on PCI quirks handling which is + * + * Copyright (c) 1999 Martin Mares <mj@ucw.cz> + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/pnp.h> +#include <linux/io.h> +#include "base.h" + +static void quirk_awe32_add_ports(struct pnp_dev *dev, + struct pnp_option *option, + unsigned int offset) +{ + struct pnp_option *new_option; + + new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL); + if (!new_option) { + dev_err(&dev->dev, "couldn't add ioport region to option set " + "%d\n", pnp_option_set(option)); + return; + } + + *new_option = *option; + new_option->u.port.min += offset; + new_option->u.port.max += offset; + list_add(&new_option->list, &option->list); + + dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n", + (unsigned long long) new_option->u.port.min, + (unsigned long long) new_option->u.port.max, + pnp_option_set(option)); +} + +static void quirk_awe32_resources(struct pnp_dev *dev) +{ + struct pnp_option *option; + unsigned int set = ~0; + + /* + * Add two extra ioport regions (at offset 0x400 and 0x800 from the + * one given) to every dependent option set. + */ + list_for_each_entry(option, &dev->options, list) { + if (pnp_option_is_dependent(option) && + pnp_option_set(option) != set) { + set = pnp_option_set(option); + quirk_awe32_add_ports(dev, option, 0x800); + quirk_awe32_add_ports(dev, option, 0x400); + } + } +} + +static void quirk_cmi8330_resources(struct pnp_dev *dev) +{ + struct pnp_option *option; + struct pnp_irq *irq; + struct pnp_dma *dma; + + list_for_each_entry(option, &dev->options, list) { + if (!pnp_option_is_dependent(option)) + continue; + + if (option->type == IORESOURCE_IRQ) { + irq = &option->u.irq; + bitmap_zero(irq->map.bits, PNP_IRQ_NR); + __set_bit(5, irq->map.bits); + __set_bit(7, irq->map.bits); + __set_bit(10, irq->map.bits); + dev_info(&dev->dev, "set possible IRQs in " + "option set %d to 5, 7, 10\n", + pnp_option_set(option)); + } else if (option->type == IORESOURCE_DMA) { + dma = &option->u.dma; + if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) == + IORESOURCE_DMA_8BIT && + dma->map != 0x0A) { + dev_info(&dev->dev, "changing possible " + "DMA channel mask in option set %d " + "from %#02x to 0x0A (1, 3)\n", + pnp_option_set(option), dma->map); + dma->map = 0x0A; + } + } + } +} + +static void quirk_sb16audio_resources(struct pnp_dev *dev) +{ + struct pnp_option *option; + unsigned int prev_option_flags = ~0, n = 0; + struct pnp_port *port; + + /* + * The default range on the OPL port for these devices is 0x388-0x388. + * Here we increase that range so that two such cards can be + * auto-configured. + */ + list_for_each_entry(option, &dev->options, list) { + if (prev_option_flags != option->flags) { + prev_option_flags = option->flags; + n = 0; + } + + if (pnp_option_is_dependent(option) && + option->type == IORESOURCE_IO) { + n++; + port = &option->u.port; + if (n == 3 && port->min == port->max) { + port->max += 0x70; + dev_info(&dev->dev, "increased option port " + "range from %#llx-%#llx to " + "%#llx-%#llx\n", + (unsigned long long) port->min, + (unsigned long long) port->min, + (unsigned long long) port->min, + (unsigned long long) port->max); + } + } + } +} + +static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev, + unsigned int set) +{ + struct pnp_option *tail = NULL, *first_new_option = NULL; + struct pnp_option *option, *new_option; + unsigned int flags; + + list_for_each_entry(option, &dev->options, list) { + if (pnp_option_is_dependent(option)) + tail = option; + } + if (!tail) { + dev_err(&dev->dev, "no dependent option sets\n"); + return NULL; + } + + flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL); + list_for_each_entry(option, &dev->options, list) { + if (pnp_option_is_dependent(option) && + pnp_option_set(option) == set) { + new_option = kmalloc(sizeof(struct pnp_option), + GFP_KERNEL); + if (!new_option) { + dev_err(&dev->dev, "couldn't clone dependent " + "set %d\n", set); + return NULL; + } + + *new_option = *option; + new_option->flags = flags; + if (!first_new_option) + first_new_option = new_option; + + list_add(&new_option->list, &tail->list); + tail = new_option; + } + } + + return first_new_option; +} + + +static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev) +{ + struct pnp_option *new_option; + unsigned int num_sets, i, set; + struct pnp_irq *irq; + + num_sets = dev->num_dependent_sets; + for (i = 0; i < num_sets; i++) { + new_option = pnp_clone_dependent_set(dev, i); + if (!new_option) + return; + + set = pnp_option_set(new_option); + while (new_option && pnp_option_set(new_option) == set) { + if (new_option->type == IORESOURCE_IRQ) { + irq = &new_option->u.irq; + irq->flags |= IORESOURCE_IRQ_OPTIONAL; + } + dbg_pnp_show_option(dev, new_option); + new_option = list_entry(new_option->list.next, + struct pnp_option, list); + } + + dev_info(&dev->dev, "added dependent option set %d (same as " + "set %d except IRQ optional)\n", set, i); + } +} + +static void quirk_ad1815_mpu_resources(struct pnp_dev *dev) +{ + struct pnp_option *option; + struct pnp_irq *irq = NULL; + unsigned int independent_irqs = 0; + + list_for_each_entry(option, &dev->options, list) { + if (option->type == IORESOURCE_IRQ && + !pnp_option_is_dependent(option)) { + independent_irqs++; + irq = &option->u.irq; + } + } + + if (independent_irqs != 1) + return; + + irq->flags |= IORESOURCE_IRQ_OPTIONAL; + dev_info(&dev->dev, "made independent IRQ optional\n"); +} + +static void quirk_system_pci_resources(struct pnp_dev *dev) +{ + struct pci_dev *pdev = NULL; + struct resource *res, *r; + int i, j; + + /* + * Some BIOSes have PNP motherboard devices with resources that + * partially overlap PCI BARs. The PNP system driver claims these + * motherboard resources, which prevents the normal PCI driver from + * requesting them later. + * + * This patch disables the PNP resources that conflict with PCI BARs + * so they won't be claimed by the PNP system driver. + */ + for_each_pci_dev(pdev) { + pci_dev_for_each_resource(pdev, r, i) { + unsigned long type = resource_type(r); + + if (!(type == IORESOURCE_IO || type == IORESOURCE_MEM) || + resource_size(r) == 0) + continue; + + if (r->flags & IORESOURCE_UNSET) + continue; + + for (j = 0; + (res = pnp_get_resource(dev, type, j)); j++) { + if (res->start == 0 && res->end == 0) + continue; + + /* + * If the PNP region doesn't overlap the PCI + * region at all, there's no problem. + */ + if (!resource_overlaps(res, r)) + continue; + + /* + * If the PNP region completely encloses (or is + * at least as large as) the PCI region, that's + * also OK. For example, this happens when the + * PNP device describes a bridge with PCI + * behind it. + */ + if (res->start <= r->start && res->end >= r->end) + continue; + + /* + * Otherwise, the PNP region overlaps *part* of + * the PCI region, and that might prevent a PCI + * driver from requesting its resources. + */ + dev_warn(&dev->dev, + "disabling %pR because it overlaps %s BAR %d %pR\n", + res, pci_name(pdev), i, r); + res->flags |= IORESOURCE_DISABLED; + } + } + } +} + +#ifdef CONFIG_AMD_NB + +#include <asm/amd_nb.h> + +static void quirk_amd_mmconfig_area(struct pnp_dev *dev) +{ + resource_size_t start, end; + struct pnp_resource *pnp_res; + struct resource *res; + struct resource mmconfig_res, *mmconfig; + + mmconfig = amd_get_mmconfig_range(&mmconfig_res); + if (!mmconfig) + return; + + list_for_each_entry(pnp_res, &dev->resources, list) { + res = &pnp_res->res; + if (res->end < mmconfig->start || res->start > mmconfig->end || + (res->start == mmconfig->start && res->end == mmconfig->end)) + continue; + + dev_info(&dev->dev, FW_BUG + "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n", + res, mmconfig); + if (mmconfig->start < res->start) { + start = mmconfig->start; + end = res->start - 1; + pnp_add_mem_resource(dev, start, end, 0); + } + if (mmconfig->end > res->end) { + start = res->end + 1; + end = mmconfig->end; + pnp_add_mem_resource(dev, start, end, 0); + } + break; + } +} +#endif + +#ifdef CONFIG_PCI +/* Device IDs of parts that have 32KB MCH space */ +static const unsigned int mch_quirk_devices[] = { + 0x0154, /* Ivy Bridge */ + 0x0a04, /* Haswell-ULT */ + 0x0c00, /* Haswell */ + 0x1604, /* Broadwell */ +}; + +static struct pci_dev *get_intel_host(void) +{ + int i; + struct pci_dev *host; + + for (i = 0; i < ARRAY_SIZE(mch_quirk_devices); i++) { + host = pci_get_device(PCI_VENDOR_ID_INTEL, mch_quirk_devices[i], + NULL); + if (host) + return host; + } + return NULL; +} + +static void quirk_intel_mch(struct pnp_dev *dev) +{ + struct pci_dev *host; + u32 addr_lo, addr_hi; + struct pci_bus_region region; + struct resource mch; + struct pnp_resource *pnp_res; + struct resource *res; + + host = get_intel_host(); + if (!host) + return; + + /* + * MCHBAR is not an architected PCI BAR, so MCH space is usually + * reported as a PNP0C02 resource. The MCH space was originally + * 16KB, but is 32KB in newer parts. Some BIOSes still report a + * PNP0C02 resource that is only 16KB, which means the rest of the + * MCH space is consumed but unreported. + */ + + /* + * Read MCHBAR for Host Member Mapped Register Range Base + * https://www-ssl.intel.com/content/www/us/en/processors/core/4th-gen-core-family-desktop-vol-2-datasheet + * Sec 3.1.12. + */ + pci_read_config_dword(host, 0x48, &addr_lo); + region.start = addr_lo & ~0x7fff; + pci_read_config_dword(host, 0x4c, &addr_hi); + region.start |= (u64) addr_hi << 32; + region.end = region.start + 32*1024 - 1; + + memset(&mch, 0, sizeof(mch)); + mch.flags = IORESOURCE_MEM; + pcibios_bus_to_resource(host->bus, &mch, ®ion); + + list_for_each_entry(pnp_res, &dev->resources, list) { + res = &pnp_res->res; + if (res->end < mch.start || res->start > mch.end) + continue; /* no overlap */ + if (res->start == mch.start && res->end == mch.end) + continue; /* exact match */ + + dev_info(&dev->dev, FW_BUG "PNP resource %pR covers only part of %s Intel MCH; extending to %pR\n", + res, pci_name(host), &mch); + res->start = mch.start; + res->end = mch.end; + break; + } + + pci_dev_put(host); +} +#endif + +/* + * PnP Quirks + * Cards or devices that need some tweaking due to incomplete resource info + */ + +static struct pnp_fixup pnp_fixups[] = { + /* Soundblaster awe io port quirk */ + {"CTL0021", quirk_awe32_resources}, + {"CTL0022", quirk_awe32_resources}, + {"CTL0023", quirk_awe32_resources}, + /* CMI 8330 interrupt and dma fix */ + {"@X@0001", quirk_cmi8330_resources}, + /* Soundblaster audio device io port range quirk */ + {"CTL0001", quirk_sb16audio_resources}, + {"CTL0031", quirk_sb16audio_resources}, + {"CTL0041", quirk_sb16audio_resources}, + {"CTL0042", quirk_sb16audio_resources}, + {"CTL0043", quirk_sb16audio_resources}, + {"CTL0044", quirk_sb16audio_resources}, + {"CTL0045", quirk_sb16audio_resources}, + /* Add IRQ-optional MPU options */ + {"ADS7151", quirk_ad1815_mpu_resources}, + {"ADS7181", quirk_add_irq_optional_dependent_sets}, + {"AZT0002", quirk_add_irq_optional_dependent_sets}, + /* PnP resources that might overlap PCI BARs */ + {"PNP0c01", quirk_system_pci_resources}, + {"PNP0c02", quirk_system_pci_resources}, +#ifdef CONFIG_AMD_NB + {"PNP0c01", quirk_amd_mmconfig_area}, +#endif +#ifdef CONFIG_PCI + {"PNP0c02", quirk_intel_mch}, +#endif + {""} +}; + +void pnp_fixup_device(struct pnp_dev *dev) +{ + struct pnp_fixup *f; + + for (f = pnp_fixups; *f->id; f++) { + if (!compare_pnp_id(dev->id, f->id)) + continue; + pnp_dbg(&dev->dev, "%s: calling %pS\n", f->id, + f->quirk_function); + f->quirk_function(dev); + } +} diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c new file mode 100644 index 0000000000..8f7695624c --- /dev/null +++ b/drivers/pnp/resource.c @@ -0,0 +1,755 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * resource.c - Contains functions for registering and analyzing resource information + * + * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz> + * Copyright 2003 Adam Belay <ambx1@neo.rr.com> + * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/irq.h> +#include <linux/pci.h> +#include <linux/libata.h> +#include <linux/ioport.h> +#include <linux/init.h> + +#include <linux/pnp.h> +#include "base.h" + +static int pnp_reserve_irq[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some IRQ */ +static int pnp_reserve_dma[8] = {[0 ... 7] = -1 }; /* reserve (don't use) some DMA */ +static int pnp_reserve_io[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some I/O region */ +static int pnp_reserve_mem[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some memory region */ + +/* + * option registration + */ + +static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type, + unsigned int option_flags) +{ + struct pnp_option *option; + + option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL); + if (!option) + return NULL; + + option->flags = option_flags; + option->type = type; + + list_add_tail(&option->list, &dev->options); + return option; +} + +int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags, + pnp_irq_mask_t *map, unsigned char flags) +{ + struct pnp_option *option; + struct pnp_irq *irq; + + option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags); + if (!option) + return -ENOMEM; + + irq = &option->u.irq; + irq->map = *map; + irq->flags = flags; + +#ifdef CONFIG_PCI + { + int i; + + for (i = 0; i < 16; i++) + if (test_bit(i, irq->map.bits)) + pcibios_penalize_isa_irq(i, 0); + } +#endif + + dbg_pnp_show_option(dev, option); + return 0; +} + +int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags, + unsigned char map, unsigned char flags) +{ + struct pnp_option *option; + struct pnp_dma *dma; + + option = pnp_build_option(dev, IORESOURCE_DMA, option_flags); + if (!option) + return -ENOMEM; + + dma = &option->u.dma; + dma->map = map; + dma->flags = flags; + + dbg_pnp_show_option(dev, option); + return 0; +} + +int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags, + resource_size_t min, resource_size_t max, + resource_size_t align, resource_size_t size, + unsigned char flags) +{ + struct pnp_option *option; + struct pnp_port *port; + + option = pnp_build_option(dev, IORESOURCE_IO, option_flags); + if (!option) + return -ENOMEM; + + port = &option->u.port; + port->min = min; + port->max = max; + port->align = align; + port->size = size; + port->flags = flags; + + dbg_pnp_show_option(dev, option); + return 0; +} + +int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags, + resource_size_t min, resource_size_t max, + resource_size_t align, resource_size_t size, + unsigned char flags) +{ + struct pnp_option *option; + struct pnp_mem *mem; + + option = pnp_build_option(dev, IORESOURCE_MEM, option_flags); + if (!option) + return -ENOMEM; + + mem = &option->u.mem; + mem->min = min; + mem->max = max; + mem->align = align; + mem->size = size; + mem->flags = flags; + + dbg_pnp_show_option(dev, option); + return 0; +} + +void pnp_free_options(struct pnp_dev *dev) +{ + struct pnp_option *option, *tmp; + + list_for_each_entry_safe(option, tmp, &dev->options, list) { + list_del(&option->list); + kfree(option); + } +} + +/* + * resource validity checking + */ + +#define length(start, end) (*(end) - *(start) + 1) + +/* Two ranges conflict if one doesn't end before the other starts */ +#define ranged_conflict(starta, enda, startb, endb) \ + !((*(enda) < *(startb)) || (*(endb) < *(starta))) + +#define cannot_compare(flags) \ +((flags) & IORESOURCE_DISABLED) + +int pnp_check_port(struct pnp_dev *dev, struct resource *res) +{ + int i; + struct pnp_dev *tdev; + struct resource *tres; + resource_size_t *port, *end, *tport, *tend; + + port = &res->start; + end = &res->end; + + /* if the resource doesn't exist, don't complain about it */ + if (cannot_compare(res->flags)) + return 1; + + /* check if the resource is already in use, skip if the + * device is active because it itself may be in use */ + if (!dev->active) { + if (!request_region(*port, length(port, end), "pnp")) + return 0; + release_region(*port, length(port, end)); + } + + /* check if the resource is reserved */ + for (i = 0; i < 8; i++) { + int rport = pnp_reserve_io[i << 1]; + int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1; + if (ranged_conflict(port, end, &rport, &rend)) + return 0; + } + + /* check for internal conflicts */ + for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) { + if (tres != res && tres->flags & IORESOURCE_IO) { + tport = &tres->start; + tend = &tres->end; + if (ranged_conflict(port, end, tport, tend)) + return 0; + } + } + + /* check for conflicts with other pnp devices */ + pnp_for_each_dev(tdev) { + if (tdev == dev) + continue; + for (i = 0; + (tres = pnp_get_resource(tdev, IORESOURCE_IO, i)); + i++) { + if (tres->flags & IORESOURCE_IO) { + if (cannot_compare(tres->flags)) + continue; + if (tres->flags & IORESOURCE_WINDOW) + continue; + tport = &tres->start; + tend = &tres->end; + if (ranged_conflict(port, end, tport, tend)) + return 0; + } + } + } + + return 1; +} + +int pnp_check_mem(struct pnp_dev *dev, struct resource *res) +{ + int i; + struct pnp_dev *tdev; + struct resource *tres; + resource_size_t *addr, *end, *taddr, *tend; + + addr = &res->start; + end = &res->end; + + /* if the resource doesn't exist, don't complain about it */ + if (cannot_compare(res->flags)) + return 1; + + /* check if the resource is already in use, skip if the + * device is active because it itself may be in use */ + if (!dev->active) { + if (!request_mem_region(*addr, length(addr, end), "pnp")) + return 0; + release_mem_region(*addr, length(addr, end)); + } + + /* check if the resource is reserved */ + for (i = 0; i < 8; i++) { + int raddr = pnp_reserve_mem[i << 1]; + int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1; + if (ranged_conflict(addr, end, &raddr, &rend)) + return 0; + } + + /* check for internal conflicts */ + for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) { + if (tres != res && tres->flags & IORESOURCE_MEM) { + taddr = &tres->start; + tend = &tres->end; + if (ranged_conflict(addr, end, taddr, tend)) + return 0; + } + } + + /* check for conflicts with other pnp devices */ + pnp_for_each_dev(tdev) { + if (tdev == dev) + continue; + for (i = 0; + (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i)); + i++) { + if (tres->flags & IORESOURCE_MEM) { + if (cannot_compare(tres->flags)) + continue; + if (tres->flags & IORESOURCE_WINDOW) + continue; + taddr = &tres->start; + tend = &tres->end; + if (ranged_conflict(addr, end, taddr, tend)) + return 0; + } + } + } + + return 1; +} + +static irqreturn_t pnp_test_handler(int irq, void *dev_id) +{ + return IRQ_HANDLED; +} + +#ifdef CONFIG_PCI +static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci, + unsigned int irq) +{ + u32 class; + u8 progif; + + if (pci->irq == irq) { + pnp_dbg(&pnp->dev, " device %s using irq %d\n", + pci_name(pci), irq); + return 1; + } + + /* + * See pci_setup_device() and ata_pci_sff_activate_host() for + * similar IDE legacy detection. + */ + pci_read_config_dword(pci, PCI_CLASS_REVISION, &class); + class >>= 8; /* discard revision ID */ + progif = class & 0xff; + class >>= 8; + + if (class == PCI_CLASS_STORAGE_IDE) { + /* + * Unless both channels are native-PCI mode only, + * treat the compatibility IRQs as busy. + */ + if ((progif & 0x5) != 0x5) + if (ATA_PRIMARY_IRQ(pci) == irq || + ATA_SECONDARY_IRQ(pci) == irq) { + pnp_dbg(&pnp->dev, " legacy IDE device %s " + "using irq %d\n", pci_name(pci), irq); + return 1; + } + } + + return 0; +} +#endif + +static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq) +{ +#ifdef CONFIG_PCI + struct pci_dev *pci = NULL; + + for_each_pci_dev(pci) { + if (pci_dev_uses_irq(pnp, pci, irq)) { + pci_dev_put(pci); + return 1; + } + } +#endif + return 0; +} + +int pnp_check_irq(struct pnp_dev *dev, struct resource *res) +{ + int i; + struct pnp_dev *tdev; + struct resource *tres; + resource_size_t *irq; + + irq = &res->start; + + /* if the resource doesn't exist, don't complain about it */ + if (cannot_compare(res->flags)) + return 1; + + /* check if the resource is valid */ + if (*irq > 15) + return 0; + + /* check if the resource is reserved */ + for (i = 0; i < 16; i++) { + if (pnp_reserve_irq[i] == *irq) + return 0; + } + + /* check for internal conflicts */ + for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) { + if (tres != res && tres->flags & IORESOURCE_IRQ) { + if (tres->start == *irq) + return 0; + } + } + + /* check if the resource is being used by a pci device */ + if (pci_uses_irq(dev, *irq)) + return 0; + + /* check if the resource is already in use, skip if the + * device is active because it itself may be in use */ + if (!dev->active) { + if (request_irq(*irq, pnp_test_handler, + IRQF_PROBE_SHARED, "pnp", NULL)) + return 0; + free_irq(*irq, NULL); + } + + /* check for conflicts with other pnp devices */ + pnp_for_each_dev(tdev) { + if (tdev == dev) + continue; + for (i = 0; + (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i)); + i++) { + if (tres->flags & IORESOURCE_IRQ) { + if (cannot_compare(tres->flags)) + continue; + if (tres->start == *irq) + return 0; + } + } + } + + return 1; +} + +#ifdef CONFIG_ISA_DMA_API +int pnp_check_dma(struct pnp_dev *dev, struct resource *res) +{ + int i; + struct pnp_dev *tdev; + struct resource *tres; + resource_size_t *dma; + + dma = &res->start; + + /* if the resource doesn't exist, don't complain about it */ + if (cannot_compare(res->flags)) + return 1; + + /* check if the resource is valid */ + if (*dma == 4 || *dma > 7) + return 0; + + /* check if the resource is reserved */ + for (i = 0; i < 8; i++) { + if (pnp_reserve_dma[i] == *dma) + return 0; + } + + /* check for internal conflicts */ + for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) { + if (tres != res && tres->flags & IORESOURCE_DMA) { + if (tres->start == *dma) + return 0; + } + } + + /* check if the resource is already in use, skip if the + * device is active because it itself may be in use */ + if (!dev->active) { + if (request_dma(*dma, "pnp")) + return 0; + free_dma(*dma); + } + + /* check for conflicts with other pnp devices */ + pnp_for_each_dev(tdev) { + if (tdev == dev) + continue; + for (i = 0; + (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i)); + i++) { + if (tres->flags & IORESOURCE_DMA) { + if (cannot_compare(tres->flags)) + continue; + if (tres->start == *dma) + return 0; + } + } + } + + return 1; +} +#endif /* CONFIG_ISA_DMA_API */ + +unsigned long pnp_resource_type(struct resource *res) +{ + return res->flags & (IORESOURCE_IO | IORESOURCE_MEM | + IORESOURCE_IRQ | IORESOURCE_DMA | + IORESOURCE_BUS); +} + +struct resource *pnp_get_resource(struct pnp_dev *dev, + unsigned long type, unsigned int num) +{ + struct pnp_resource *pnp_res; + struct resource *res; + + list_for_each_entry(pnp_res, &dev->resources, list) { + res = &pnp_res->res; + if (pnp_resource_type(res) == type && num-- == 0) + return res; + } + return NULL; +} +EXPORT_SYMBOL(pnp_get_resource); + +static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev) +{ + struct pnp_resource *pnp_res; + + pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL); + if (!pnp_res) + return NULL; + + list_add_tail(&pnp_res->list, &dev->resources); + return pnp_res; +} + +struct pnp_resource *pnp_add_resource(struct pnp_dev *dev, + struct resource *res) +{ + struct pnp_resource *pnp_res; + + pnp_res = pnp_new_resource(dev); + if (!pnp_res) { + dev_err(&dev->dev, "can't add resource %pR\n", res); + return NULL; + } + + pnp_res->res = *res; + pnp_res->res.name = dev->name; + dev_dbg(&dev->dev, "%pR\n", res); + return pnp_res; +} + +struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq, + int flags) +{ + struct pnp_resource *pnp_res; + struct resource *res; + + pnp_res = pnp_new_resource(dev); + if (!pnp_res) { + dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq); + return NULL; + } + + res = &pnp_res->res; + res->flags = IORESOURCE_IRQ | flags; + res->start = irq; + res->end = irq; + + dev_dbg(&dev->dev, "%pR\n", res); + return pnp_res; +} + +struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma, + int flags) +{ + struct pnp_resource *pnp_res; + struct resource *res; + + pnp_res = pnp_new_resource(dev); + if (!pnp_res) { + dev_err(&dev->dev, "can't add resource for DMA %d\n", dma); + return NULL; + } + + res = &pnp_res->res; + res->flags = IORESOURCE_DMA | flags; + res->start = dma; + res->end = dma; + + dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res); + return pnp_res; +} + +struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev, + resource_size_t start, + resource_size_t end, int flags) +{ + struct pnp_resource *pnp_res; + struct resource *res; + + pnp_res = pnp_new_resource(dev); + if (!pnp_res) { + dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n", + (unsigned long long) start, + (unsigned long long) end); + return NULL; + } + + res = &pnp_res->res; + res->flags = IORESOURCE_IO | flags; + res->start = start; + res->end = end; + + dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res); + return pnp_res; +} + +struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev, + resource_size_t start, + resource_size_t end, int flags) +{ + struct pnp_resource *pnp_res; + struct resource *res; + + pnp_res = pnp_new_resource(dev); + if (!pnp_res) { + dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n", + (unsigned long long) start, + (unsigned long long) end); + return NULL; + } + + res = &pnp_res->res; + res->flags = IORESOURCE_MEM | flags; + res->start = start; + res->end = end; + + dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res); + return pnp_res; +} + +struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev, + resource_size_t start, + resource_size_t end) +{ + struct pnp_resource *pnp_res; + struct resource *res; + + pnp_res = pnp_new_resource(dev); + if (!pnp_res) { + dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n", + (unsigned long long) start, + (unsigned long long) end); + return NULL; + } + + res = &pnp_res->res; + res->flags = IORESOURCE_BUS; + res->start = start; + res->end = end; + + dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res); + return pnp_res; +} + +/* + * Determine whether the specified resource is a possible configuration + * for this device. + */ +int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start, + resource_size_t size) +{ + struct pnp_option *option; + struct pnp_port *port; + struct pnp_mem *mem; + struct pnp_irq *irq; + struct pnp_dma *dma; + + list_for_each_entry(option, &dev->options, list) { + if (option->type != type) + continue; + + switch (option->type) { + case IORESOURCE_IO: + port = &option->u.port; + if (port->min == start && port->size == size) + return 1; + break; + case IORESOURCE_MEM: + mem = &option->u.mem; + if (mem->min == start && mem->size == size) + return 1; + break; + case IORESOURCE_IRQ: + irq = &option->u.irq; + if (start < PNP_IRQ_NR && + test_bit(start, irq->map.bits)) + return 1; + break; + case IORESOURCE_DMA: + dma = &option->u.dma; + if (dma->map & (1 << start)) + return 1; + break; + } + } + + return 0; +} +EXPORT_SYMBOL(pnp_possible_config); + +int pnp_range_reserved(resource_size_t start, resource_size_t end) +{ + struct pnp_dev *dev; + struct pnp_resource *pnp_res; + resource_size_t *dev_start, *dev_end; + + pnp_for_each_dev(dev) { + list_for_each_entry(pnp_res, &dev->resources, list) { + dev_start = &pnp_res->res.start; + dev_end = &pnp_res->res.end; + if (ranged_conflict(&start, &end, dev_start, dev_end)) + return 1; + } + } + return 0; +} +EXPORT_SYMBOL(pnp_range_reserved); + +/* format is: pnp_reserve_irq=irq1[,irq2] .... */ +static int __init pnp_setup_reserve_irq(char *str) +{ + int i; + + for (i = 0; i < 16; i++) + if (get_option(&str, &pnp_reserve_irq[i]) != 2) + break; + return 1; +} + +__setup("pnp_reserve_irq=", pnp_setup_reserve_irq); + +/* format is: pnp_reserve_dma=dma1[,dma2] .... */ +static int __init pnp_setup_reserve_dma(char *str) +{ + int i; + + for (i = 0; i < 8; i++) + if (get_option(&str, &pnp_reserve_dma[i]) != 2) + break; + return 1; +} + +__setup("pnp_reserve_dma=", pnp_setup_reserve_dma); + +/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */ +static int __init pnp_setup_reserve_io(char *str) +{ + int i; + + for (i = 0; i < 16; i++) + if (get_option(&str, &pnp_reserve_io[i]) != 2) + break; + return 1; +} + +__setup("pnp_reserve_io=", pnp_setup_reserve_io); + +/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */ +static int __init pnp_setup_reserve_mem(char *str) +{ + int i; + + for (i = 0; i < 16; i++) + if (get_option(&str, &pnp_reserve_mem[i]) != 2) + break; + return 1; +} + +__setup("pnp_reserve_mem=", pnp_setup_reserve_mem); diff --git a/drivers/pnp/support.c b/drivers/pnp/support.c new file mode 100644 index 0000000000..a6073db10e --- /dev/null +++ b/drivers/pnp/support.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * support.c - standard functions for the use of pnp protocol drivers + * + * Copyright 2003 Adam Belay <ambx1@neo.rr.com> + * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ + +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/pnp.h> +#include "base.h" + +/** + * pnp_is_active - Determines if a device is active based on its current + * resources + * @dev: pointer to the desired PnP device + */ +int pnp_is_active(struct pnp_dev *dev) +{ + /* + * I don't think this is very reliable because pnp_disable_dev() + * only clears out auto-assigned resources. + */ + if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 && + !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 && + pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1) + return 0; + else + return 1; +} +EXPORT_SYMBOL(pnp_is_active); + +/* + * Functionally similar to acpi_ex_eisa_id_to_string(), but that's + * buried in the ACPI CA, and we can't depend on it being present. + */ +void pnp_eisa_id_to_string(u32 id, char *str) +{ + id = be32_to_cpu(id); + + /* + * According to the specs, the first three characters are five-bit + * compressed ASCII, and the left-over high order bit should be zero. + * However, the Linux ISAPNP code historically used six bits for the + * first character, and there seem to be IDs that depend on that, + * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the + * FreeBSD sys/pc98/cbus/sio_cbus.c driver. + */ + str[0] = 'A' + ((id >> 26) & 0x3f) - 1; + str[1] = 'A' + ((id >> 21) & 0x1f) - 1; + str[2] = 'A' + ((id >> 16) & 0x1f) - 1; + str[3] = hex_asc_hi(id >> 8); + str[4] = hex_asc_lo(id >> 8); + str[5] = hex_asc_hi(id); + str[6] = hex_asc_lo(id); + str[7] = '\0'; +} + +char *pnp_resource_type_name(struct resource *res) +{ + switch (pnp_resource_type(res)) { + case IORESOURCE_IO: + return "io"; + case IORESOURCE_MEM: + return "mem"; + case IORESOURCE_IRQ: + return "irq"; + case IORESOURCE_DMA: + return "dma"; + case IORESOURCE_BUS: + return "bus"; + } + return "unknown"; +} + +void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc) +{ + struct pnp_resource *pnp_res; + + if (list_empty(&dev->resources)) + pnp_dbg(&dev->dev, "%s: no current resources\n", desc); + else { + pnp_dbg(&dev->dev, "%s: current resources:\n", desc); + list_for_each_entry(pnp_res, &dev->resources, list) + pnp_dbg(&dev->dev, "%pr\n", &pnp_res->res); + } +} + +char *pnp_option_priority_name(struct pnp_option *option) +{ + switch (pnp_option_priority(option)) { + case PNP_RES_PRIORITY_PREFERRED: + return "preferred"; + case PNP_RES_PRIORITY_ACCEPTABLE: + return "acceptable"; + case PNP_RES_PRIORITY_FUNCTIONAL: + return "functional"; + } + return "invalid"; +} + +void dbg_pnp_show_option(struct pnp_dev *dev, struct pnp_option *option) +{ + char buf[128]; + int len = 0, i; + struct pnp_port *port; + struct pnp_mem *mem; + struct pnp_irq *irq; + struct pnp_dma *dma; + + if (pnp_option_is_dependent(option)) + len += scnprintf(buf + len, sizeof(buf) - len, + " dependent set %d (%s) ", + pnp_option_set(option), + pnp_option_priority_name(option)); + else + len += scnprintf(buf + len, sizeof(buf) - len, + " independent "); + + switch (option->type) { + case IORESOURCE_IO: + port = &option->u.port; + len += scnprintf(buf + len, sizeof(buf) - len, "io min %#llx " + "max %#llx align %lld size %lld flags %#x", + (unsigned long long) port->min, + (unsigned long long) port->max, + (unsigned long long) port->align, + (unsigned long long) port->size, port->flags); + break; + case IORESOURCE_MEM: + mem = &option->u.mem; + len += scnprintf(buf + len, sizeof(buf) - len, "mem min %#llx " + "max %#llx align %lld size %lld flags %#x", + (unsigned long long) mem->min, + (unsigned long long) mem->max, + (unsigned long long) mem->align, + (unsigned long long) mem->size, mem->flags); + break; + case IORESOURCE_IRQ: + irq = &option->u.irq; + len += scnprintf(buf + len, sizeof(buf) - len, "irq"); + if (bitmap_empty(irq->map.bits, PNP_IRQ_NR)) + len += scnprintf(buf + len, sizeof(buf) - len, + " <none>"); + else { + for (i = 0; i < PNP_IRQ_NR; i++) + if (test_bit(i, irq->map.bits)) + len += scnprintf(buf + len, + sizeof(buf) - len, + " %d", i); + } + len += scnprintf(buf + len, sizeof(buf) - len, " flags %#x", + irq->flags); + if (irq->flags & IORESOURCE_IRQ_OPTIONAL) + len += scnprintf(buf + len, sizeof(buf) - len, + " (optional)"); + break; + case IORESOURCE_DMA: + dma = &option->u.dma; + len += scnprintf(buf + len, sizeof(buf) - len, "dma"); + if (!dma->map) + len += scnprintf(buf + len, sizeof(buf) - len, + " <none>"); + else { + for (i = 0; i < 8; i++) + if (dma->map & (1 << i)) + len += scnprintf(buf + len, + sizeof(buf) - len, + " %d", i); + } + len += scnprintf(buf + len, sizeof(buf) - len, " (bitmask %#x) " + "flags %#x", dma->map, dma->flags); + break; + } + pnp_dbg(&dev->dev, "%s\n", buf); +} diff --git a/drivers/pnp/system.c b/drivers/pnp/system.c new file mode 100644 index 0000000000..835113b2cb --- /dev/null +++ b/drivers/pnp/system.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * system.c - a driver for reserving pnp system resources + * + * Some code is based on pnpbios_core.c + * Copyright 2002 Adam Belay <ambx1@neo.rr.com> + * (c) Copyright 2007 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ + +#include <linux/pnp.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/ioport.h> + +static const struct pnp_device_id pnp_dev_table[] = { + /* General ID for reserving resources */ + {"PNP0c02", 0}, + /* memory controller */ + {"PNP0c01", 0}, + {"", 0} +}; + +static void reserve_range(struct pnp_dev *dev, struct resource *r, int port) +{ + char *regionid; + const char *pnpid = dev_name(&dev->dev); + resource_size_t start = r->start, end = r->end; + struct resource *res; + + regionid = kmalloc(16, GFP_KERNEL); + if (!regionid) + return; + + snprintf(regionid, 16, "pnp %s", pnpid); + if (port) + res = request_region(start, end - start + 1, regionid); + else + res = request_mem_region(start, end - start + 1, regionid); + if (res) + res->flags &= ~IORESOURCE_BUSY; + else + kfree(regionid); + + /* + * Failures at this point are usually harmless. pci quirks for + * example do reserve stuff they know about too, so we may well + * have double reservations. + */ + dev_info(&dev->dev, "%pR %s reserved\n", r, + res ? "has been" : "could not be"); +} + +static void reserve_resources_of_dev(struct pnp_dev *dev) +{ + struct resource *res; + int i; + + for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) { + if (res->flags & IORESOURCE_DISABLED) + continue; + if (res->start == 0) + continue; /* disabled */ + if (res->start < 0x100) + /* + * Below 0x100 is only standard PC hardware + * (pics, kbd, timer, dma, ...) + * We should not get resource conflicts there, + * and the kernel reserves these anyway + * (see arch/i386/kernel/setup.c). + * So, do nothing + */ + continue; + if (res->end < res->start) + continue; /* invalid */ + + reserve_range(dev, res, 1); + } + + for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) { + if (res->flags & IORESOURCE_DISABLED) + continue; + + reserve_range(dev, res, 0); + } +} + +static int system_pnp_probe(struct pnp_dev *dev, + const struct pnp_device_id *dev_id) +{ + reserve_resources_of_dev(dev); + return 0; +} + +static struct pnp_driver system_pnp_driver = { + .name = "system", + .id_table = pnp_dev_table, + .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, + .probe = system_pnp_probe, +}; + +static int __init pnp_system_init(void) +{ + return pnp_register_driver(&system_pnp_driver); +} + +/* + * Reserve motherboard resources after PCI claim BARs, + * but before PCI assign resources for uninitialized PCI devices + */ +fs_initcall(pnp_system_init); |