1 /* 2 * This file contains quirk handling code for PnP devices 3 * Some devices do not report all their resources, and need to have extra 4 * resources added. This is most easily accomplished at initialisation time 5 * when building up the resource structure for the first time. 6 * 7 * Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk> 8 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. 9 * Bjorn Helgaas <bjorn.helgaas@hp.com> 10 * 11 * Heavily based on PCI quirks handling which is 12 * 13 * Copyright (c) 1999 Martin Mares <mj@ucw.cz> 14 */ 15 16 #include <linux/types.h> 17 #include <linux/kernel.h> 18 #include <linux/string.h> 19 #include <linux/slab.h> 20 #include <linux/pnp.h> 21 #include <linux/io.h> 22 #include <linux/kallsyms.h> 23 #include "base.h" 24 25 static void quirk_awe32_add_ports(struct pnp_dev *dev, 26 struct pnp_option *option, 27 unsigned int offset) 28 { 29 struct pnp_option *new_option; 30 31 new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL); 32 if (!new_option) { 33 dev_err(&dev->dev, "couldn't add ioport region to option set " 34 "%d\n", pnp_option_set(option)); 35 return; 36 } 37 38 *new_option = *option; 39 new_option->u.port.min += offset; 40 new_option->u.port.max += offset; 41 list_add(&new_option->list, &option->list); 42 43 dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n", 44 (unsigned long long) new_option->u.port.min, 45 (unsigned long long) new_option->u.port.max, 46 pnp_option_set(option)); 47 } 48 49 static void quirk_awe32_resources(struct pnp_dev *dev) 50 { 51 struct pnp_option *option; 52 unsigned int set = ~0; 53 54 /* 55 * Add two extra ioport regions (at offset 0x400 and 0x800 from the 56 * one given) to every dependent option set. 57 */ 58 list_for_each_entry(option, &dev->options, list) { 59 if (pnp_option_is_dependent(option) && 60 pnp_option_set(option) != set) { 61 set = pnp_option_set(option); 62 quirk_awe32_add_ports(dev, option, 0x800); 63 quirk_awe32_add_ports(dev, option, 0x400); 64 } 65 } 66 } 67 68 static void quirk_cmi8330_resources(struct pnp_dev *dev) 69 { 70 struct pnp_option *option; 71 struct pnp_irq *irq; 72 struct pnp_dma *dma; 73 74 list_for_each_entry(option, &dev->options, list) { 75 if (!pnp_option_is_dependent(option)) 76 continue; 77 78 if (option->type == IORESOURCE_IRQ) { 79 irq = &option->u.irq; 80 bitmap_zero(irq->map.bits, PNP_IRQ_NR); 81 __set_bit(5, irq->map.bits); 82 __set_bit(7, irq->map.bits); 83 __set_bit(10, irq->map.bits); 84 dev_info(&dev->dev, "set possible IRQs in " 85 "option set %d to 5, 7, 10\n", 86 pnp_option_set(option)); 87 } else if (option->type == IORESOURCE_DMA) { 88 dma = &option->u.dma; 89 if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) == 90 IORESOURCE_DMA_8BIT && 91 dma->map != 0x0A) { 92 dev_info(&dev->dev, "changing possible " 93 "DMA channel mask in option set %d " 94 "from %#02x to 0x0A (1, 3)\n", 95 pnp_option_set(option), dma->map); 96 dma->map = 0x0A; 97 } 98 } 99 } 100 } 101 102 static void quirk_sb16audio_resources(struct pnp_dev *dev) 103 { 104 struct pnp_option *option; 105 unsigned int prev_option_flags = ~0, n = 0; 106 struct pnp_port *port; 107 108 /* 109 * The default range on the OPL port for these devices is 0x388-0x388. 110 * Here we increase that range so that two such cards can be 111 * auto-configured. 112 */ 113 list_for_each_entry(option, &dev->options, list) { 114 if (prev_option_flags != option->flags) { 115 prev_option_flags = option->flags; 116 n = 0; 117 } 118 119 if (pnp_option_is_dependent(option) && 120 option->type == IORESOURCE_IO) { 121 n++; 122 port = &option->u.port; 123 if (n == 3 && port->min == port->max) { 124 port->max += 0x70; 125 dev_info(&dev->dev, "increased option port " 126 "range from %#llx-%#llx to " 127 "%#llx-%#llx\n", 128 (unsigned long long) port->min, 129 (unsigned long long) port->min, 130 (unsigned long long) port->min, 131 (unsigned long long) port->max); 132 } 133 } 134 } 135 } 136 137 static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev, 138 unsigned int set) 139 { 140 struct pnp_option *tail = NULL, *first_new_option = NULL; 141 struct pnp_option *option, *new_option; 142 unsigned int flags; 143 144 list_for_each_entry(option, &dev->options, list) { 145 if (pnp_option_is_dependent(option)) 146 tail = option; 147 } 148 if (!tail) { 149 dev_err(&dev->dev, "no dependent option sets\n"); 150 return NULL; 151 } 152 153 flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL); 154 list_for_each_entry(option, &dev->options, list) { 155 if (pnp_option_is_dependent(option) && 156 pnp_option_set(option) == set) { 157 new_option = kmalloc(sizeof(struct pnp_option), 158 GFP_KERNEL); 159 if (!new_option) { 160 dev_err(&dev->dev, "couldn't clone dependent " 161 "set %d\n", set); 162 return NULL; 163 } 164 165 *new_option = *option; 166 new_option->flags = flags; 167 if (!first_new_option) 168 first_new_option = new_option; 169 170 list_add(&new_option->list, &tail->list); 171 tail = new_option; 172 } 173 } 174 175 return first_new_option; 176 } 177 178 179 static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev) 180 { 181 struct pnp_option *new_option; 182 unsigned int num_sets, i, set; 183 struct pnp_irq *irq; 184 185 num_sets = dev->num_dependent_sets; 186 for (i = 0; i < num_sets; i++) { 187 new_option = pnp_clone_dependent_set(dev, i); 188 if (!new_option) 189 return; 190 191 set = pnp_option_set(new_option); 192 while (new_option && pnp_option_set(new_option) == set) { 193 if (new_option->type == IORESOURCE_IRQ) { 194 irq = &new_option->u.irq; 195 irq->flags |= IORESOURCE_IRQ_OPTIONAL; 196 } 197 dbg_pnp_show_option(dev, new_option); 198 new_option = list_entry(new_option->list.next, 199 struct pnp_option, list); 200 } 201 202 dev_info(&dev->dev, "added dependent option set %d (same as " 203 "set %d except IRQ optional)\n", set, i); 204 } 205 } 206 207 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev) 208 { 209 struct pnp_option *option; 210 struct pnp_irq *irq = NULL; 211 unsigned int independent_irqs = 0; 212 213 list_for_each_entry(option, &dev->options, list) { 214 if (option->type == IORESOURCE_IRQ && 215 !pnp_option_is_dependent(option)) { 216 independent_irqs++; 217 irq = &option->u.irq; 218 } 219 } 220 221 if (independent_irqs != 1) 222 return; 223 224 irq->flags |= IORESOURCE_IRQ_OPTIONAL; 225 dev_info(&dev->dev, "made independent IRQ optional\n"); 226 } 227 228 #include <linux/pci.h> 229 230 static void quirk_system_pci_resources(struct pnp_dev *dev) 231 { 232 struct pci_dev *pdev = NULL; 233 struct resource *res; 234 resource_size_t pnp_start, pnp_end, pci_start, pci_end; 235 int i, j; 236 237 /* 238 * Some BIOSes have PNP motherboard devices with resources that 239 * partially overlap PCI BARs. The PNP system driver claims these 240 * motherboard resources, which prevents the normal PCI driver from 241 * requesting them later. 242 * 243 * This patch disables the PNP resources that conflict with PCI BARs 244 * so they won't be claimed by the PNP system driver. 245 */ 246 for_each_pci_dev(pdev) { 247 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 248 unsigned long type; 249 250 type = pci_resource_flags(pdev, i) & 251 (IORESOURCE_IO | IORESOURCE_MEM); 252 if (!type || pci_resource_len(pdev, i) == 0) 253 continue; 254 255 pci_start = pci_resource_start(pdev, i); 256 pci_end = pci_resource_end(pdev, i); 257 for (j = 0; 258 (res = pnp_get_resource(dev, type, j)); j++) { 259 if (res->start == 0 && res->end == 0) 260 continue; 261 262 pnp_start = res->start; 263 pnp_end = res->end; 264 265 /* 266 * If the PNP region doesn't overlap the PCI 267 * region at all, there's no problem. 268 */ 269 if (pnp_end < pci_start || pnp_start > pci_end) 270 continue; 271 272 /* 273 * If the PNP region completely encloses (or is 274 * at least as large as) the PCI region, that's 275 * also OK. For example, this happens when the 276 * PNP device describes a bridge with PCI 277 * behind it. 278 */ 279 if (pnp_start <= pci_start && 280 pnp_end >= pci_end) 281 continue; 282 283 /* 284 * Otherwise, the PNP region overlaps *part* of 285 * the PCI region, and that might prevent a PCI 286 * driver from requesting its resources. 287 */ 288 dev_warn(&dev->dev, 289 "disabling %pR because it overlaps " 290 "%s BAR %d %pR\n", res, 291 pci_name(pdev), i, &pdev->resource[i]); 292 res->flags |= IORESOURCE_DISABLED; 293 } 294 } 295 } 296 } 297 298 #ifdef CONFIG_AMD_NB 299 300 #include <asm/amd_nb.h> 301 302 static void quirk_amd_mmconfig_area(struct pnp_dev *dev) 303 { 304 resource_size_t start, end; 305 struct pnp_resource *pnp_res; 306 struct resource *res; 307 struct resource mmconfig_res, *mmconfig; 308 309 mmconfig = amd_get_mmconfig_range(&mmconfig_res); 310 if (!mmconfig) 311 return; 312 313 list_for_each_entry(pnp_res, &dev->resources, list) { 314 res = &pnp_res->res; 315 if (res->end < mmconfig->start || res->start > mmconfig->end || 316 (res->start == mmconfig->start && res->end == mmconfig->end)) 317 continue; 318 319 dev_info(&dev->dev, FW_BUG 320 "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n", 321 res, mmconfig); 322 if (mmconfig->start < res->start) { 323 start = mmconfig->start; 324 end = res->start - 1; 325 pnp_add_mem_resource(dev, start, end, 0); 326 } 327 if (mmconfig->end > res->end) { 328 start = res->end + 1; 329 end = mmconfig->end; 330 pnp_add_mem_resource(dev, start, end, 0); 331 } 332 break; 333 } 334 } 335 #endif 336 337 /* 338 * PnP Quirks 339 * Cards or devices that need some tweaking due to incomplete resource info 340 */ 341 342 static struct pnp_fixup pnp_fixups[] = { 343 /* Soundblaster awe io port quirk */ 344 {"CTL0021", quirk_awe32_resources}, 345 {"CTL0022", quirk_awe32_resources}, 346 {"CTL0023", quirk_awe32_resources}, 347 /* CMI 8330 interrupt and dma fix */ 348 {"@X@0001", quirk_cmi8330_resources}, 349 /* Soundblaster audio device io port range quirk */ 350 {"CTL0001", quirk_sb16audio_resources}, 351 {"CTL0031", quirk_sb16audio_resources}, 352 {"CTL0041", quirk_sb16audio_resources}, 353 {"CTL0042", quirk_sb16audio_resources}, 354 {"CTL0043", quirk_sb16audio_resources}, 355 {"CTL0044", quirk_sb16audio_resources}, 356 {"CTL0045", quirk_sb16audio_resources}, 357 /* Add IRQ-optional MPU options */ 358 {"ADS7151", quirk_ad1815_mpu_resources}, 359 {"ADS7181", quirk_add_irq_optional_dependent_sets}, 360 {"AZT0002", quirk_add_irq_optional_dependent_sets}, 361 /* PnP resources that might overlap PCI BARs */ 362 {"PNP0c01", quirk_system_pci_resources}, 363 {"PNP0c02", quirk_system_pci_resources}, 364 #ifdef CONFIG_AMD_NB 365 {"PNP0c01", quirk_amd_mmconfig_area}, 366 #endif 367 {""} 368 }; 369 370 void pnp_fixup_device(struct pnp_dev *dev) 371 { 372 struct pnp_fixup *f; 373 374 for (f = pnp_fixups; *f->id; f++) { 375 if (!compare_pnp_id(dev->id, f->id)) 376 continue; 377 pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id, 378 f->quirk_function); 379 f->quirk_function(dev); 380 } 381 } 382