summaryrefslogtreecommitdiffstats
path: root/drivers/pnp/quirks.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pnp/quirks.c')
-rw-r--r--drivers/pnp/quirks.c454
1 files changed, 454 insertions, 0 deletions
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, &region);
+
+ 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);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 18:49:50 +0000