diff options
Diffstat (limited to 'drivers/pcmcia/ds.c')
| -rw-r--r-- | drivers/pcmcia/ds.c | 1454 |
1 files changed, 1454 insertions, 0 deletions
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c new file mode 100644 index 000000000..2eb81d948 --- /dev/null +++ b/drivers/pcmcia/ds.c @@ -0,0 +1,1454 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ds.c -- 16-bit PCMCIA core support + * + * The initial developer of the original code is David A. Hinds + * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds + * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. + * + * (C) 1999 David A. Hinds + * (C) 2003 - 2010 Dominik Brodowski + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/list.h> +#include <linux/delay.h> +#include <linux/workqueue.h> +#include <linux/crc32.h> +#include <linux/firmware.h> +#include <linux/kref.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> + +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> +#include <pcmcia/ss.h> + +#include "cs_internal.h" + +/*====================================================================*/ + +/* Module parameters */ + +MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); +MODULE_DESCRIPTION("PCMCIA Driver Services"); +MODULE_LICENSE("GPL"); + + +/*====================================================================*/ + +static void pcmcia_check_driver(struct pcmcia_driver *p_drv) +{ + const struct pcmcia_device_id *did = p_drv->id_table; + unsigned int i; + u32 hash; + + if (!p_drv->probe || !p_drv->remove) + printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " + "function\n", p_drv->name); + + while (did && did->match_flags) { + for (i = 0; i < 4; i++) { + if (!did->prod_id[i]) + continue; + + hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); + if (hash == did->prod_id_hash[i]) + continue; + + printk(KERN_DEBUG "pcmcia: %s: invalid hash for " + "product string \"%s\": is 0x%x, should " + "be 0x%x\n", p_drv->name, did->prod_id[i], + did->prod_id_hash[i], hash); + printk(KERN_DEBUG "pcmcia: see " + "Documentation/pcmcia/devicetable.rst for " + "details\n"); + } + did++; + } + + return; +} + + +/*======================================================================*/ + + +struct pcmcia_dynid { + struct list_head node; + struct pcmcia_device_id id; +}; + +/** + * new_id_store() - add a new PCMCIA device ID to this driver and re-probe devices + * @driver: target device driver + * @buf: buffer for scanning device ID data + * @count: input size + * + * Adds a new dynamic PCMCIA device ID to this driver, + * and causes the driver to probe for all devices again. + */ +static ssize_t +new_id_store(struct device_driver *driver, const char *buf, size_t count) +{ + struct pcmcia_dynid *dynid; + struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); + __u16 match_flags, manf_id, card_id; + __u8 func_id, function, device_no; + __u32 prod_id_hash[4] = {0, 0, 0, 0}; + int fields = 0; + int retval = 0; + + fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", + &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, + &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); + if (fields < 6) + return -EINVAL; + + dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); + if (!dynid) + return -ENOMEM; + + dynid->id.match_flags = match_flags; + dynid->id.manf_id = manf_id; + dynid->id.card_id = card_id; + dynid->id.func_id = func_id; + dynid->id.function = function; + dynid->id.device_no = device_no; + memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); + + mutex_lock(&pdrv->dynids.lock); + list_add_tail(&dynid->node, &pdrv->dynids.list); + mutex_unlock(&pdrv->dynids.lock); + + retval = driver_attach(&pdrv->drv); + + if (retval) + return retval; + return count; +} +static DRIVER_ATTR_WO(new_id); + +static void +pcmcia_free_dynids(struct pcmcia_driver *drv) +{ + struct pcmcia_dynid *dynid, *n; + + mutex_lock(&drv->dynids.lock); + list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { + list_del(&dynid->node); + kfree(dynid); + } + mutex_unlock(&drv->dynids.lock); +} + +static int +pcmcia_create_newid_file(struct pcmcia_driver *drv) +{ + int error = 0; + if (drv->probe != NULL) + error = driver_create_file(&drv->drv, &driver_attr_new_id); + return error; +} + +static void +pcmcia_remove_newid_file(struct pcmcia_driver *drv) +{ + driver_remove_file(&drv->drv, &driver_attr_new_id); +} + +/** + * pcmcia_register_driver - register a PCMCIA driver with the bus core + * @driver: the &driver being registered + * + * Registers a PCMCIA driver with the PCMCIA bus core. + */ +int pcmcia_register_driver(struct pcmcia_driver *driver) +{ + int error; + + if (!driver) + return -EINVAL; + + pcmcia_check_driver(driver); + + /* initialize common fields */ + driver->drv.bus = &pcmcia_bus_type; + driver->drv.owner = driver->owner; + driver->drv.name = driver->name; + mutex_init(&driver->dynids.lock); + INIT_LIST_HEAD(&driver->dynids.list); + + pr_debug("registering driver %s\n", driver->name); + + error = driver_register(&driver->drv); + if (error < 0) + return error; + + error = pcmcia_create_newid_file(driver); + if (error) + driver_unregister(&driver->drv); + + return error; +} +EXPORT_SYMBOL(pcmcia_register_driver); + +/** + * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core + * @driver: the &driver being unregistered + */ +void pcmcia_unregister_driver(struct pcmcia_driver *driver) +{ + pr_debug("unregistering driver %s\n", driver->name); + pcmcia_remove_newid_file(driver); + driver_unregister(&driver->drv); + pcmcia_free_dynids(driver); +} +EXPORT_SYMBOL(pcmcia_unregister_driver); + + +/* pcmcia_device handling */ + +static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev) +{ + struct device *tmp_dev; + tmp_dev = get_device(&p_dev->dev); + if (!tmp_dev) + return NULL; + return to_pcmcia_dev(tmp_dev); +} + +static void pcmcia_put_dev(struct pcmcia_device *p_dev) +{ + if (p_dev) + put_device(&p_dev->dev); +} + +static void pcmcia_release_function(struct kref *ref) +{ + struct config_t *c = container_of(ref, struct config_t, ref); + pr_debug("releasing config_t\n"); + kfree(c); +} + +static void pcmcia_release_dev(struct device *dev) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + int i; + dev_dbg(dev, "releasing device\n"); + pcmcia_put_socket(p_dev->socket); + for (i = 0; i < 4; i++) + kfree(p_dev->prod_id[i]); + kfree(p_dev->devname); + kref_put(&p_dev->function_config->ref, pcmcia_release_function); + kfree(p_dev); +} + + +static int pcmcia_device_probe(struct device *dev) +{ + struct pcmcia_device *p_dev; + struct pcmcia_driver *p_drv; + struct pcmcia_socket *s; + cistpl_config_t cis_config; + int ret = 0; + + dev = get_device(dev); + if (!dev) + return -ENODEV; + + p_dev = to_pcmcia_dev(dev); + p_drv = to_pcmcia_drv(dev->driver); + s = p_dev->socket; + + dev_dbg(dev, "trying to bind to %s\n", p_drv->name); + + if ((!p_drv->probe) || (!p_dev->function_config) || + (!try_module_get(p_drv->owner))) { + ret = -EINVAL; + goto put_dev; + } + + /* set up some more device information */ + ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, + &cis_config); + if (!ret) { + p_dev->config_base = cis_config.base; + p_dev->config_regs = cis_config.rmask[0]; + dev_dbg(dev, "base %x, regs %x", p_dev->config_base, + p_dev->config_regs); + } else { + dev_info(dev, + "pcmcia: could not parse base and rmask0 of CIS\n"); + p_dev->config_base = 0; + p_dev->config_regs = 0; + } + + ret = p_drv->probe(p_dev); + if (ret) { + dev_dbg(dev, "binding to %s failed with %d\n", + p_drv->name, ret); + goto put_module; + } + dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name, + p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq); + dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR", + p_dev->resource[0], p_dev->resource[1], p_dev->resource[2], + p_dev->resource[3], p_dev->resource[4]); + + mutex_lock(&s->ops_mutex); + if ((s->pcmcia_pfc) && + (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) + pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); + mutex_unlock(&s->ops_mutex); + +put_module: + if (ret) + module_put(p_drv->owner); +put_dev: + if (ret) + put_device(dev); + return ret; +} + + +/* + * Removes a PCMCIA card from the device tree and socket list. + */ +static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) +{ + struct pcmcia_device *p_dev; + struct pcmcia_device *tmp; + + dev_dbg(leftover ? &leftover->dev : &s->dev, + "pcmcia_card_remove(%d) %s\n", s->sock, + leftover ? leftover->devname : ""); + + mutex_lock(&s->ops_mutex); + if (!leftover) + s->device_count = 0; + else + s->device_count = 1; + mutex_unlock(&s->ops_mutex); + + /* unregister all pcmcia_devices registered with this socket, except leftover */ + list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { + if (p_dev == leftover) + continue; + + mutex_lock(&s->ops_mutex); + list_del(&p_dev->socket_device_list); + mutex_unlock(&s->ops_mutex); + + dev_dbg(&p_dev->dev, "unregistering device\n"); + device_unregister(&p_dev->dev); + } + + return; +} + +static void pcmcia_device_remove(struct device *dev) +{ + struct pcmcia_device *p_dev; + struct pcmcia_driver *p_drv; + int i; + + p_dev = to_pcmcia_dev(dev); + p_drv = to_pcmcia_drv(dev->driver); + + dev_dbg(dev, "removing device\n"); + + /* If we're removing the primary module driving a + * pseudo multi-function card, we need to unbind + * all devices + */ + if ((p_dev->socket->pcmcia_pfc) && + (p_dev->socket->device_count > 0) && + (p_dev->device_no == 0)) + pcmcia_card_remove(p_dev->socket, p_dev); + + /* detach the "instance" */ + if (p_drv->remove) + p_drv->remove(p_dev); + + /* check for proper unloading */ + if (p_dev->_irq || p_dev->_io || p_dev->_locked) + dev_info(dev, + "pcmcia: driver %s did not release config properly\n", + p_drv->name); + + for (i = 0; i < MAX_WIN; i++) + if (p_dev->_win & CLIENT_WIN_REQ(i)) + dev_info(dev, + "pcmcia: driver %s did not release window properly\n", + p_drv->name); + + /* references from pcmcia_device_probe */ + pcmcia_put_dev(p_dev); + module_put(p_drv->owner); +} + + +/* + * pcmcia_device_query -- determine information about a pcmcia device + */ +static int pcmcia_device_query(struct pcmcia_device *p_dev) +{ + cistpl_manfid_t manf_id; + cistpl_funcid_t func_id; + cistpl_vers_1_t *vers1; + unsigned int i; + + vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); + if (!vers1) + return -ENOMEM; + + if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, + CISTPL_MANFID, &manf_id)) { + mutex_lock(&p_dev->socket->ops_mutex); + p_dev->manf_id = manf_id.manf; + p_dev->card_id = manf_id.card; + p_dev->has_manf_id = 1; + p_dev->has_card_id = 1; + mutex_unlock(&p_dev->socket->ops_mutex); + } + + if (!pccard_read_tuple(p_dev->socket, p_dev->func, + CISTPL_FUNCID, &func_id)) { + mutex_lock(&p_dev->socket->ops_mutex); + p_dev->func_id = func_id.func; + p_dev->has_func_id = 1; + mutex_unlock(&p_dev->socket->ops_mutex); + } else { + /* rule of thumb: cards with no FUNCID, but with + * common memory device geometry information, are + * probably memory cards (from pcmcia-cs) */ + cistpl_device_geo_t *devgeo; + + devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); + if (!devgeo) { + kfree(vers1); + return -ENOMEM; + } + if (!pccard_read_tuple(p_dev->socket, p_dev->func, + CISTPL_DEVICE_GEO, devgeo)) { + dev_dbg(&p_dev->dev, + "mem device geometry probably means " + "FUNCID_MEMORY\n"); + mutex_lock(&p_dev->socket->ops_mutex); + p_dev->func_id = CISTPL_FUNCID_MEMORY; + p_dev->has_func_id = 1; + mutex_unlock(&p_dev->socket->ops_mutex); + } + kfree(devgeo); + } + + if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, + vers1)) { + mutex_lock(&p_dev->socket->ops_mutex); + for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { + char *tmp; + unsigned int length; + char *new; + + tmp = vers1->str + vers1->ofs[i]; + + length = strlen(tmp) + 1; + if ((length < 2) || (length > 255)) + continue; + + new = kstrdup(tmp, GFP_KERNEL); + if (!new) + continue; + + tmp = p_dev->prod_id[i]; + p_dev->prod_id[i] = new; + kfree(tmp); + } + mutex_unlock(&p_dev->socket->ops_mutex); + } + + kfree(vers1); + return 0; +} + + +static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, + unsigned int function) +{ + struct pcmcia_device *p_dev, *tmp_dev; + int i; + + s = pcmcia_get_socket(s); + if (!s) + return NULL; + + pr_debug("adding device to %d, function %d\n", s->sock, function); + + p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); + if (!p_dev) + goto err_put; + + mutex_lock(&s->ops_mutex); + p_dev->device_no = (s->device_count++); + mutex_unlock(&s->ops_mutex); + + /* max of 2 PFC devices */ + if ((p_dev->device_no >= 2) && (function == 0)) + goto err_free; + + /* max of 4 devices overall */ + if (p_dev->device_no >= 4) + goto err_free; + + p_dev->socket = s; + p_dev->func = function; + + p_dev->dev.bus = &pcmcia_bus_type; + p_dev->dev.parent = s->dev.parent; + p_dev->dev.release = pcmcia_release_dev; + /* by default don't allow DMA */ + p_dev->dma_mask = 0; + p_dev->dev.dma_mask = &p_dev->dma_mask; + p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); + if (!p_dev->devname) + goto err_free; + dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); + + mutex_lock(&s->ops_mutex); + + /* + * p_dev->function_config must be the same for all card functions. + * Note that this is serialized by ops_mutex, so that only one + * such struct will be created. + */ + list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) + if (p_dev->func == tmp_dev->func) { + p_dev->function_config = tmp_dev->function_config; + p_dev->irq = tmp_dev->irq; + kref_get(&p_dev->function_config->ref); + } + + /* Add to the list in pcmcia_bus_socket */ + list_add(&p_dev->socket_device_list, &s->devices_list); + + if (pcmcia_setup_irq(p_dev)) + dev_warn(&p_dev->dev, + "IRQ setup failed -- device might not work\n"); + + if (!p_dev->function_config) { + config_t *c; + dev_dbg(&p_dev->dev, "creating config_t\n"); + c = kzalloc(sizeof(struct config_t), GFP_KERNEL); + if (!c) { + mutex_unlock(&s->ops_mutex); + goto err_unreg; + } + p_dev->function_config = c; + kref_init(&c->ref); + for (i = 0; i < MAX_IO_WIN; i++) { + c->io[i].name = p_dev->devname; + c->io[i].flags = IORESOURCE_IO; + } + for (i = 0; i < MAX_WIN; i++) { + c->mem[i].name = p_dev->devname; + c->mem[i].flags = IORESOURCE_MEM; + } + } + for (i = 0; i < MAX_IO_WIN; i++) + p_dev->resource[i] = &p_dev->function_config->io[i]; + for (; i < (MAX_IO_WIN + MAX_WIN); i++) + p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN]; + + mutex_unlock(&s->ops_mutex); + + dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n", + p_dev->devname, p_dev->irq); + + pcmcia_device_query(p_dev); + + dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); + if (device_register(&p_dev->dev)) { + mutex_lock(&s->ops_mutex); + list_del(&p_dev->socket_device_list); + s->device_count--; + mutex_unlock(&s->ops_mutex); + put_device(&p_dev->dev); + return NULL; + } + + return p_dev; + + err_unreg: + mutex_lock(&s->ops_mutex); + list_del(&p_dev->socket_device_list); + mutex_unlock(&s->ops_mutex); + + err_free: + mutex_lock(&s->ops_mutex); + s->device_count--; + mutex_unlock(&s->ops_mutex); + + for (i = 0; i < 4; i++) + kfree(p_dev->prod_id[i]); + kfree(p_dev->devname); + kfree(p_dev); + err_put: + pcmcia_put_socket(s); + + return NULL; +} + + +static int pcmcia_card_add(struct pcmcia_socket *s) +{ + cistpl_longlink_mfc_t mfc; + unsigned int no_funcs, i, no_chains; + int ret = -EAGAIN; + + mutex_lock(&s->ops_mutex); + if (!(s->resource_setup_done)) { + dev_dbg(&s->dev, + "no resources available, delaying card_add\n"); + mutex_unlock(&s->ops_mutex); + return -EAGAIN; /* try again, but later... */ + } + + if (pcmcia_validate_mem(s)) { + dev_dbg(&s->dev, "validating mem resources failed, " + "delaying card_add\n"); + mutex_unlock(&s->ops_mutex); + return -EAGAIN; /* try again, but later... */ + } + mutex_unlock(&s->ops_mutex); + + ret = pccard_validate_cis(s, &no_chains); + if (ret || !no_chains) { +#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS) + /* Set up as an anonymous card. If we don't have anonymous + memory support then just error the card as there is no + point trying to second guess. + + Note: some cards have just a device entry, it may be + worth extending support to cover these in future */ + if (ret == -EIO) { + dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n"); + pcmcia_replace_cis(s, "\xFF", 1); + no_chains = 1; + ret = 0; + } else +#endif + { + dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); + return -ENODEV; + } + } + + if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) + no_funcs = mfc.nfn; + else + no_funcs = 1; + s->functions = no_funcs; + + for (i = 0; i < no_funcs; i++) + pcmcia_device_add(s, i); + + return ret; +} + + +static int pcmcia_requery_callback(struct device *dev, void *_data) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + if (!p_dev->dev.driver) { + dev_dbg(dev, "update device information\n"); + pcmcia_device_query(p_dev); + } + + return 0; +} + + +static void pcmcia_requery(struct pcmcia_socket *s) +{ + int has_pfc; + + if (!(s->state & SOCKET_PRESENT)) + return; + + if (s->functions == 0) { + pcmcia_card_add(s); + return; + } + + /* some device information might have changed because of a CIS + * update or because we can finally read it correctly... so + * determine it again, overwriting old values if necessary. */ + bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback); + + /* if the CIS changed, we need to check whether the number of + * functions changed. */ + if (s->fake_cis) { + int old_funcs, new_funcs; + cistpl_longlink_mfc_t mfc; + + /* does this cis override add or remove functions? */ + old_funcs = s->functions; + + if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, + &mfc)) + new_funcs = mfc.nfn; + else + new_funcs = 1; + if (old_funcs != new_funcs) { + /* we need to re-start */ + pcmcia_card_remove(s, NULL); + s->functions = 0; + pcmcia_card_add(s); + } + } + + /* If the PCMCIA device consists of two pseudo devices, + * call pcmcia_device_add() -- which will fail if both + * devices are already registered. */ + mutex_lock(&s->ops_mutex); + has_pfc = s->pcmcia_pfc; + mutex_unlock(&s->ops_mutex); + if (has_pfc) + pcmcia_device_add(s, 0); + + /* we re-scan all devices, not just the ones connected to this + * socket. This does not matter, though. */ + if (bus_rescan_devices(&pcmcia_bus_type)) + dev_warn(&s->dev, "rescanning the bus failed\n"); +} + + +#ifdef CONFIG_PCMCIA_LOAD_CIS + +/** + * pcmcia_load_firmware - load CIS from userspace if device-provided is broken + * @dev: the pcmcia device which needs a CIS override + * @filename: requested filename in /lib/firmware/ + * + * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if + * the one provided by the card is broken. The firmware files reside in + * /lib/firmware/ in userspace. + */ +static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename) +{ + struct pcmcia_socket *s = dev->socket; + const struct firmware *fw; + int ret = -ENOMEM; + cistpl_longlink_mfc_t mfc; + int old_funcs, new_funcs = 1; + + if (!filename) + return -EINVAL; + + dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename); + + if (request_firmware(&fw, filename, &dev->dev) == 0) { + if (fw->size >= CISTPL_MAX_CIS_SIZE) { + ret = -EINVAL; + dev_err(&dev->dev, "pcmcia: CIS override is too big\n"); + goto release; + } + + if (!pcmcia_replace_cis(s, fw->data, fw->size)) + ret = 0; + else { + dev_err(&dev->dev, "pcmcia: CIS override failed\n"); + goto release; + } + + /* we need to re-start if the number of functions changed */ + old_funcs = s->functions; + if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, + &mfc)) + new_funcs = mfc.nfn; + + if (old_funcs != new_funcs) + ret = -EBUSY; + + /* update information */ + pcmcia_device_query(dev); + + /* requery (as number of functions might have changed) */ + pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); + } + release: + release_firmware(fw); + + return ret; +} + +#else /* !CONFIG_PCMCIA_LOAD_CIS */ + +static inline int pcmcia_load_firmware(struct pcmcia_device *dev, + char *filename) +{ + return -ENODEV; +} + +#endif + + +static inline int pcmcia_devmatch(struct pcmcia_device *dev, + const struct pcmcia_device_id *did) +{ + if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { + if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { + if ((!dev->has_card_id) || (dev->card_id != did->card_id)) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { + if (dev->func != did->function) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { + if (!dev->prod_id[0]) + return 0; + if (strcmp(did->prod_id[0], dev->prod_id[0])) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { + if (!dev->prod_id[1]) + return 0; + if (strcmp(did->prod_id[1], dev->prod_id[1])) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { + if (!dev->prod_id[2]) + return 0; + if (strcmp(did->prod_id[2], dev->prod_id[2])) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { + if (!dev->prod_id[3]) + return 0; + if (strcmp(did->prod_id[3], dev->prod_id[3])) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { + dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n"); + mutex_lock(&dev->socket->ops_mutex); + dev->socket->pcmcia_pfc = 1; + mutex_unlock(&dev->socket->ops_mutex); + if (dev->device_no != did->device_no) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { + int ret; + + if ((!dev->has_func_id) || (dev->func_id != did->func_id)) + return 0; + + /* if this is a pseudo-multi-function device, + * we need explicit matches */ + if (dev->socket->pcmcia_pfc) + return 0; + if (dev->device_no) + return 0; + + /* also, FUNC_ID matching needs to be activated by userspace + * after it has re-checked that there is no possible module + * with a prod_id/manf_id/card_id match. + */ + mutex_lock(&dev->socket->ops_mutex); + ret = dev->allow_func_id_match; + mutex_unlock(&dev->socket->ops_mutex); + + if (!ret) { + dev_dbg(&dev->dev, + "skipping FUNC_ID match until userspace ACK\n"); + return 0; + } + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { + dev_dbg(&dev->dev, "device needs a fake CIS\n"); + if (!dev->socket->fake_cis) + if (pcmcia_load_firmware(dev, did->cisfile)) + return 0; + } + + if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { + int i; + for (i = 0; i < 4; i++) + if (dev->prod_id[i]) + return 0; + if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) + return 0; + } + + return 1; +} + + +static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); + const struct pcmcia_device_id *did = p_drv->id_table; + struct pcmcia_dynid *dynid; + + /* match dynamic devices first */ + mutex_lock(&p_drv->dynids.lock); + list_for_each_entry(dynid, &p_drv->dynids.list, node) { + dev_dbg(dev, "trying to match to %s\n", drv->name); + if (pcmcia_devmatch(p_dev, &dynid->id)) { + dev_dbg(dev, "matched to %s\n", drv->name); + mutex_unlock(&p_drv->dynids.lock); + return 1; + } + } + mutex_unlock(&p_drv->dynids.lock); + + while (did && did->match_flags) { + dev_dbg(dev, "trying to match to %s\n", drv->name); + if (pcmcia_devmatch(p_dev, did)) { + dev_dbg(dev, "matched to %s\n", drv->name); + return 1; + } + did++; + } + + return 0; +} + +static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct pcmcia_device *p_dev; + int i; + u32 hash[4] = { 0, 0, 0, 0}; + + if (!dev) + return -ENODEV; + + p_dev = to_pcmcia_dev(dev); + + /* calculate hashes */ + for (i = 0; i < 4; i++) { + if (!p_dev->prod_id[i]) + continue; + hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); + } + + if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) + return -ENOMEM; + + if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) + return -ENOMEM; + + if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" + "pa%08Xpb%08Xpc%08Xpd%08X", + p_dev->has_manf_id ? p_dev->manf_id : 0, + p_dev->has_card_id ? p_dev->card_id : 0, + p_dev->has_func_id ? p_dev->func_id : 0, + p_dev->func, + p_dev->device_no, + hash[0], + hash[1], + hash[2], + hash[3])) + return -ENOMEM; + + return 0; +} + +/************************ runtime PM support ***************************/ + +static int pcmcia_dev_suspend(struct device *dev); +static int pcmcia_dev_resume(struct device *dev); + +static int runtime_suspend(struct device *dev) +{ + int rc; + + device_lock(dev); + rc = pcmcia_dev_suspend(dev); + device_unlock(dev); + return rc; +} + +static int runtime_resume(struct device *dev) +{ + int rc; + + device_lock(dev); + rc = pcmcia_dev_resume(dev); + device_unlock(dev); + return rc; +} + +/************************ per-device sysfs output ***************************/ + +#define pcmcia_device_attr(field, test, format) \ +static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ + return p_dev->test ? sysfs_emit(buf, format, p_dev->field) : -ENODEV; \ +} \ +static DEVICE_ATTR_RO(field); + +#define pcmcia_device_stringattr(name, field) \ +static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ + return p_dev->field ? sysfs_emit(buf, "%s\n", p_dev->field) : -ENODEV; \ +} \ +static DEVICE_ATTR_RO(name); + +pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); +pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); +pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); +pcmcia_device_stringattr(prod_id1, prod_id[0]); +pcmcia_device_stringattr(prod_id2, prod_id[1]); +pcmcia_device_stringattr(prod_id3, prod_id[2]); +pcmcia_device_stringattr(prod_id4, prod_id[3]); + +static ssize_t function_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + return p_dev->socket ? sysfs_emit(buf, "0x%02x\n", p_dev->func) : -ENODEV; +} +static DEVICE_ATTR_RO(function); + +static ssize_t resources_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + int i, at = 0; + + for (i = 0; i < PCMCIA_NUM_RESOURCES; i++) + at += sysfs_emit_at(buf, at, "%pr\n", p_dev->resource[i]); + + return at; +} +static DEVICE_ATTR_RO(resources); + +static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + + if (p_dev->suspended) + return sysfs_emit(buf, "off\n"); + else + return sysfs_emit(buf, "on\n"); +} + +static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + int ret = 0; + + if (!count) + return -EINVAL; + + if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) + ret = runtime_suspend(dev); + else if (p_dev->suspended && !strncmp(buf, "on", 2)) + ret = runtime_resume(dev); + + return ret ? ret : count; +} +static DEVICE_ATTR_RW(pm_state); + +static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + int i; + u32 hash[4] = { 0, 0, 0, 0}; + + /* calculate hashes */ + for (i = 0; i < 4; i++) { + if (!p_dev->prod_id[i]) + continue; + hash[i] = crc32(0, p_dev->prod_id[i], + strlen(p_dev->prod_id[i])); + } + return sysfs_emit(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02Xpa%08Xpb%08Xpc%08Xpd%08X\n", + p_dev->has_manf_id ? p_dev->manf_id : 0, + p_dev->has_card_id ? p_dev->card_id : 0, + p_dev->has_func_id ? p_dev->func_id : 0, + p_dev->func, p_dev->device_no, + hash[0], hash[1], hash[2], hash[3]); +} +static DEVICE_ATTR_RO(modalias); + +static ssize_t allow_func_id_match_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + + if (!count) + return -EINVAL; + + mutex_lock(&p_dev->socket->ops_mutex); + p_dev->allow_func_id_match = 1; + mutex_unlock(&p_dev->socket->ops_mutex); + pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY); + + return count; +} +static DEVICE_ATTR_WO(allow_func_id_match); + +static struct attribute *pcmcia_dev_attrs[] = { + &dev_attr_resources.attr, + &dev_attr_pm_state.attr, + &dev_attr_function.attr, + &dev_attr_func_id.attr, + &dev_attr_manf_id.attr, + &dev_attr_card_id.attr, + &dev_attr_prod_id1.attr, + &dev_attr_prod_id2.attr, + &dev_attr_prod_id3.attr, + &dev_attr_prod_id4.attr, + &dev_attr_modalias.attr, + &dev_attr_allow_func_id_match.attr, + NULL, +}; +ATTRIBUTE_GROUPS(pcmcia_dev); + +/* PM support, also needed for reset */ + +static int pcmcia_dev_suspend(struct device *dev) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + struct pcmcia_driver *p_drv = NULL; + int ret = 0; + + mutex_lock(&p_dev->socket->ops_mutex); + if (p_dev->suspended) { + mutex_unlock(&p_dev->socket->ops_mutex); + return 0; + } + p_dev->suspended = 1; + mutex_unlock(&p_dev->socket->ops_mutex); + + dev_dbg(dev, "suspending\n"); + + if (dev->driver) + p_drv = to_pcmcia_drv(dev->driver); + + if (!p_drv) + goto out; + + if (p_drv->suspend) { + ret = p_drv->suspend(p_dev); + if (ret) { + dev_err(dev, + "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n", + p_dev->devname, p_drv->name, ret); + mutex_lock(&p_dev->socket->ops_mutex); + p_dev->suspended = 0; + mutex_unlock(&p_dev->socket->ops_mutex); + goto out; + } + } + + if (p_dev->device_no == p_dev->func) { + dev_dbg(dev, "releasing configuration\n"); + pcmcia_release_configuration(p_dev); + } + + out: + return ret; +} + + +static int pcmcia_dev_resume(struct device *dev) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + struct pcmcia_driver *p_drv = NULL; + int ret = 0; + + mutex_lock(&p_dev->socket->ops_mutex); + if (!p_dev->suspended) { + mutex_unlock(&p_dev->socket->ops_mutex); + return 0; + } + p_dev->suspended = 0; + mutex_unlock(&p_dev->socket->ops_mutex); + + dev_dbg(dev, "resuming\n"); + + if (dev->driver) + p_drv = to_pcmcia_drv(dev->driver); + + if (!p_drv) + goto out; + + if (p_dev->device_no == p_dev->func) { + dev_dbg(dev, "requesting configuration\n"); + ret = pcmcia_enable_device(p_dev); + if (ret) + goto out; + } + + if (p_drv->resume) + ret = p_drv->resume(p_dev); + + out: + return ret; +} + + +static int pcmcia_bus_suspend_callback(struct device *dev, void *_data) +{ + struct pcmcia_socket *skt = _data; + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + + if (p_dev->socket != skt || p_dev->suspended) + return 0; + + return runtime_suspend(dev); +} + +static int pcmcia_bus_resume_callback(struct device *dev, void *_data) +{ + struct pcmcia_socket *skt = _data; + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + + if (p_dev->socket != skt || !p_dev->suspended) + return 0; + + runtime_resume(dev); + + return 0; +} + +static int pcmcia_bus_resume(struct pcmcia_socket *skt) +{ + dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); + bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); + return 0; +} + +static int pcmcia_bus_suspend(struct pcmcia_socket *skt) +{ + dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); + if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, + pcmcia_bus_suspend_callback)) { + pcmcia_bus_resume(skt); + return -EIO; + } + return 0; +} + +static int pcmcia_bus_remove(struct pcmcia_socket *skt) +{ + atomic_set(&skt->present, 0); + pcmcia_card_remove(skt, NULL); + + mutex_lock(&skt->ops_mutex); + destroy_cis_cache(skt); + pcmcia_cleanup_irq(skt); + mutex_unlock(&skt->ops_mutex); + + return 0; +} + +static int pcmcia_bus_add(struct pcmcia_socket *skt) +{ + atomic_set(&skt->present, 1); + + mutex_lock(&skt->ops_mutex); + skt->pcmcia_pfc = 0; + destroy_cis_cache(skt); /* to be on the safe side... */ + mutex_unlock(&skt->ops_mutex); + + pcmcia_card_add(skt); + + return 0; +} + +static int pcmcia_bus_early_resume(struct pcmcia_socket *skt) +{ + if (!verify_cis_cache(skt)) + return 0; + + dev_dbg(&skt->dev, "cis mismatch - different card\n"); + + /* first, remove the card */ + pcmcia_bus_remove(skt); + + mutex_lock(&skt->ops_mutex); + destroy_cis_cache(skt); + kfree(skt->fake_cis); + skt->fake_cis = NULL; + skt->functions = 0; + mutex_unlock(&skt->ops_mutex); + + /* now, add the new card */ + pcmcia_bus_add(skt); + return 0; +} + + +/* + * NOTE: This is racy. There's no guarantee the card will still be + * physically present, even if the call to this function returns + * non-NULL. Furthermore, the device driver most likely is unbound + * almost immediately, so the timeframe where pcmcia_dev_present + * returns NULL is probably really really small. + */ +struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) +{ + struct pcmcia_device *p_dev; + struct pcmcia_device *ret = NULL; + + p_dev = pcmcia_get_dev(_p_dev); + if (!p_dev) + return NULL; + + if (atomic_read(&p_dev->socket->present) != 0) + ret = p_dev; + + pcmcia_put_dev(p_dev); + return ret; +} +EXPORT_SYMBOL(pcmcia_dev_present); + + +static struct pcmcia_callback pcmcia_bus_callback = { + .owner = THIS_MODULE, + .add = pcmcia_bus_add, + .remove = pcmcia_bus_remove, + .requery = pcmcia_requery, + .validate = pccard_validate_cis, + .suspend = pcmcia_bus_suspend, + .early_resume = pcmcia_bus_early_resume, + .resume = pcmcia_bus_resume, +}; + +static int pcmcia_bus_add_socket(struct device *dev, + struct class_interface *class_intf) +{ + struct pcmcia_socket *socket = dev_get_drvdata(dev); + int ret; + + socket = pcmcia_get_socket(socket); + if (!socket) { + dev_err(dev, "PCMCIA obtaining reference to socket failed\n"); + return -ENODEV; + } + + ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); + if (ret) { + dev_err(dev, "PCMCIA registration failed\n"); + pcmcia_put_socket(socket); + return ret; + } + + INIT_LIST_HEAD(&socket->devices_list); + socket->pcmcia_pfc = 0; + socket->device_count = 0; + atomic_set(&socket->present, 0); + + ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); + if (ret) { + dev_err(dev, "PCMCIA registration failed\n"); + pcmcia_put_socket(socket); + return ret; + } + + return 0; +} + +static void pcmcia_bus_remove_socket(struct device *dev, + struct class_interface *class_intf) +{ + struct pcmcia_socket *socket = dev_get_drvdata(dev); + + if (!socket) + return; + + pccard_register_pcmcia(socket, NULL); + + /* unregister any unbound devices */ + mutex_lock(&socket->skt_mutex); + pcmcia_card_remove(socket, NULL); + release_cis_mem(socket); + mutex_unlock(&socket->skt_mutex); + + sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); + + pcmcia_put_socket(socket); + + return; +} + + +/* the pcmcia_bus_interface is used to handle pcmcia socket devices */ +static struct class_interface pcmcia_bus_interface __refdata = { + .class = &pcmcia_socket_class, + .add_dev = &pcmcia_bus_add_socket, + .remove_dev = &pcmcia_bus_remove_socket, +}; + +static const struct dev_pm_ops pcmcia_bus_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume) +}; + +struct bus_type pcmcia_bus_type = { + .name = "pcmcia", + .uevent = pcmcia_bus_uevent, + .match = pcmcia_bus_match, + .dev_groups = pcmcia_dev_groups, + .probe = pcmcia_device_probe, + .remove = pcmcia_device_remove, + .pm = &pcmcia_bus_pm_ops, +}; + + +static int __init init_pcmcia_bus(void) +{ + int ret; + + ret = bus_register(&pcmcia_bus_type); + if (ret < 0) { + printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); + return ret; + } + ret = class_interface_register(&pcmcia_bus_interface); + if (ret < 0) { + printk(KERN_WARNING + "pcmcia: class_interface_register error: %d\n", ret); + bus_unregister(&pcmcia_bus_type); + return ret; + } + + return 0; +} +fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that + * pcmcia_socket_class is already registered */ + + +static void __exit exit_pcmcia_bus(void) +{ + class_interface_unregister(&pcmcia_bus_interface); + + bus_unregister(&pcmcia_bus_type); +} +module_exit(exit_pcmcia_bus); + + +MODULE_ALIAS("ds"); |