1 /* 2 * Linux driver attachment glue for PCI based controllers. 3 * 4 * Copyright (c) 2000-2001 Adaptec Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * substantially similar to the "NO WARRANTY" disclaimer below 15 * ("Disclaimer") and any redistribution must be conditioned upon 16 * including a substantially similar Disclaimer requirement for further 17 * binary redistribution. 18 * 3. Neither the names of the above-listed copyright holders nor the names 19 * of any contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * Alternatively, this software may be distributed under the terms of the 23 * GNU General Public License ("GPL") version 2 as published by the Free 24 * Software Foundation. 25 * 26 * NO WARRANTY 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGES. 38 * 39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $ 40 */ 41 42 #include "aic7xxx_osm.h" 43 #include "aic7xxx_pci.h" 44 45 /* Define the macro locally since it's different for different class of chips. 46 */ 47 #define ID(x) ID_C(x, PCI_CLASS_STORAGE_SCSI) 48 49 static const struct pci_device_id ahc_linux_pci_id_table[] = { 50 /* aic7850 based controllers */ 51 ID(ID_AHA_2902_04_10_15_20C_30C), 52 /* aic7860 based controllers */ 53 ID(ID_AHA_2930CU), 54 ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK), 55 ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK), 56 ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK), 57 ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK), 58 /* aic7870 based controllers */ 59 ID(ID_AHA_2940), 60 ID(ID_AHA_3940), 61 ID(ID_AHA_398X), 62 ID(ID_AHA_2944), 63 ID(ID_AHA_3944), 64 ID(ID_AHA_4944), 65 /* aic7880 based controllers */ 66 ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK), 67 ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK), 68 ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK), 69 ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK), 70 ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK), 71 ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK), 72 ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK), 73 ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK), 74 ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK), 75 /* aic7890 based controllers */ 76 ID(ID_AHA_2930U2), 77 ID(ID_AHA_2940U2B), 78 ID(ID_AHA_2940U2_OEM), 79 ID(ID_AHA_2940U2), 80 ID(ID_AHA_2950U2B), 81 ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK), 82 ID(ID_AAA_131U2), 83 /* aic7890 based controllers */ 84 ID(ID_AHA_29160), 85 ID(ID_AHA_29160_CPQ), 86 ID(ID_AHA_29160N), 87 ID(ID_AHA_29160C), 88 ID(ID_AHA_29160B), 89 ID(ID_AHA_19160B), 90 ID(ID_AIC7892_ARO), 91 /* aic7892 based controllers */ 92 ID(ID_AHA_2940U_DUAL), 93 ID(ID_AHA_3940AU), 94 ID(ID_AHA_3944AU), 95 ID(ID_AIC7895_ARO), 96 ID(ID_AHA_3950U2B_0), 97 ID(ID_AHA_3950U2B_1), 98 ID(ID_AHA_3950U2D_0), 99 ID(ID_AHA_3950U2D_1), 100 ID(ID_AIC7896_ARO), 101 /* aic7899 based controllers */ 102 ID(ID_AHA_3960D), 103 ID(ID_AHA_3960D_CPQ), 104 ID(ID_AIC7899_ARO), 105 /* Generic chip probes for devices we don't know exactly. */ 106 ID(ID_AIC7850 & ID_DEV_VENDOR_MASK), 107 ID(ID_AIC7855 & ID_DEV_VENDOR_MASK), 108 ID(ID_AIC7859 & ID_DEV_VENDOR_MASK), 109 ID(ID_AIC7860 & ID_DEV_VENDOR_MASK), 110 ID(ID_AIC7870 & ID_DEV_VENDOR_MASK), 111 ID(ID_AIC7880 & ID_DEV_VENDOR_MASK), 112 ID16(ID_AIC7890 & ID_9005_GENERIC_MASK), 113 ID16(ID_AIC7892 & ID_9005_GENERIC_MASK), 114 ID(ID_AIC7895 & ID_DEV_VENDOR_MASK), 115 ID16(ID_AIC7896 & ID_9005_GENERIC_MASK), 116 ID16(ID_AIC7899 & ID_9005_GENERIC_MASK), 117 ID(ID_AIC7810 & ID_DEV_VENDOR_MASK), 118 ID(ID_AIC7815 & ID_DEV_VENDOR_MASK), 119 { 0 } 120 }; 121 122 MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table); 123 124 static int __maybe_unused 125 ahc_linux_pci_dev_suspend(struct device *dev) 126 { 127 struct ahc_softc *ahc = dev_get_drvdata(dev); 128 129 return ahc_suspend(ahc); 130 } 131 132 static int __maybe_unused 133 ahc_linux_pci_dev_resume(struct device *dev) 134 { 135 struct ahc_softc *ahc = dev_get_drvdata(dev); 136 137 ahc_pci_resume(ahc); 138 139 return (ahc_resume(ahc)); 140 } 141 142 static void 143 ahc_linux_pci_dev_remove(struct pci_dev *pdev) 144 { 145 struct ahc_softc *ahc = pci_get_drvdata(pdev); 146 u_long s; 147 148 if (ahc->platform_data && ahc->platform_data->host) 149 scsi_remove_host(ahc->platform_data->host); 150 151 ahc_lock(ahc, &s); 152 ahc_intr_enable(ahc, FALSE); 153 ahc_unlock(ahc, &s); 154 ahc_free(ahc); 155 } 156 157 static void 158 ahc_linux_pci_inherit_flags(struct ahc_softc *ahc) 159 { 160 struct pci_dev *pdev = ahc->dev_softc, *master_pdev; 161 unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); 162 163 master_pdev = pci_get_slot(pdev->bus, master_devfn); 164 if (master_pdev) { 165 struct ahc_softc *master = pci_get_drvdata(master_pdev); 166 if (master) { 167 ahc->flags &= ~AHC_BIOS_ENABLED; 168 ahc->flags |= master->flags & AHC_BIOS_ENABLED; 169 170 ahc->flags &= ~AHC_PRIMARY_CHANNEL; 171 ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL; 172 } else 173 printk(KERN_ERR "aic7xxx: no multichannel peer found!\n"); 174 pci_dev_put(master_pdev); 175 } 176 } 177 178 static int 179 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 180 { 181 char buf[80]; 182 const uint64_t mask_39bit = 0x7FFFFFFFFFULL; 183 struct ahc_softc *ahc; 184 ahc_dev_softc_t pci; 185 const struct ahc_pci_identity *entry; 186 char *name; 187 int error; 188 struct device *dev = &pdev->dev; 189 190 pci = pdev; 191 entry = ahc_find_pci_device(pci); 192 if (entry == NULL) 193 return (-ENODEV); 194 195 /* 196 * Allocate a softc for this card and 197 * set it up for attachment by our 198 * common detect routine. 199 */ 200 sprintf(buf, "ahc_pci:%d:%d:%d", 201 ahc_get_pci_bus(pci), 202 ahc_get_pci_slot(pci), 203 ahc_get_pci_function(pci)); 204 name = kstrdup(buf, GFP_ATOMIC); 205 if (name == NULL) 206 return (-ENOMEM); 207 ahc = ahc_alloc(NULL, name); 208 if (ahc == NULL) 209 return (-ENOMEM); 210 if (pci_enable_device(pdev)) { 211 ahc_free(ahc); 212 return (-ENODEV); 213 } 214 pci_set_master(pdev); 215 216 if (sizeof(dma_addr_t) > 4 217 && ahc->features & AHC_LARGE_SCBS 218 && dma_set_mask(dev, mask_39bit) == 0 219 && dma_get_required_mask(dev) > DMA_BIT_MASK(32)) { 220 ahc->flags |= AHC_39BIT_ADDRESSING; 221 } else { 222 if (dma_set_mask(dev, DMA_BIT_MASK(32))) { 223 ahc_free(ahc); 224 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); 225 return (-ENODEV); 226 } 227 } 228 ahc->dev_softc = pci; 229 ahc->dev = &pci->dev; 230 error = ahc_pci_config(ahc, entry); 231 if (error != 0) { 232 ahc_free(ahc); 233 return (-error); 234 } 235 236 /* 237 * Second Function PCI devices need to inherit some 238 * settings from function 0. 239 */ 240 if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0) 241 ahc_linux_pci_inherit_flags(ahc); 242 243 pci_set_drvdata(pdev, ahc); 244 ahc_linux_register_host(ahc, &aic7xxx_driver_template); 245 return (0); 246 } 247 248 /******************************* PCI Routines *********************************/ 249 uint32_t 250 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width) 251 { 252 switch (width) { 253 case 1: 254 { 255 uint8_t retval; 256 257 pci_read_config_byte(pci, reg, &retval); 258 return (retval); 259 } 260 case 2: 261 { 262 uint16_t retval; 263 pci_read_config_word(pci, reg, &retval); 264 return (retval); 265 } 266 case 4: 267 { 268 uint32_t retval; 269 pci_read_config_dword(pci, reg, &retval); 270 return (retval); 271 } 272 default: 273 panic("ahc_pci_read_config: Read size too big"); 274 /* NOTREACHED */ 275 return (0); 276 } 277 } 278 279 void 280 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width) 281 { 282 switch (width) { 283 case 1: 284 pci_write_config_byte(pci, reg, value); 285 break; 286 case 2: 287 pci_write_config_word(pci, reg, value); 288 break; 289 case 4: 290 pci_write_config_dword(pci, reg, value); 291 break; 292 default: 293 panic("ahc_pci_write_config: Write size too big"); 294 /* NOTREACHED */ 295 } 296 } 297 298 static SIMPLE_DEV_PM_OPS(ahc_linux_pci_dev_pm_ops, 299 ahc_linux_pci_dev_suspend, 300 ahc_linux_pci_dev_resume); 301 302 static struct pci_driver aic7xxx_pci_driver = { 303 .name = "aic7xxx", 304 .probe = ahc_linux_pci_dev_probe, 305 .driver.pm = &ahc_linux_pci_dev_pm_ops, 306 .remove = ahc_linux_pci_dev_remove, 307 .id_table = ahc_linux_pci_id_table 308 }; 309 310 int 311 ahc_linux_pci_init(void) 312 { 313 return pci_register_driver(&aic7xxx_pci_driver); 314 } 315 316 void 317 ahc_linux_pci_exit(void) 318 { 319 pci_unregister_driver(&aic7xxx_pci_driver); 320 } 321 322 static int 323 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base) 324 { 325 if (aic7xxx_allow_memio == 0) 326 return (ENOMEM); 327 328 *base = pci_resource_start(ahc->dev_softc, 0); 329 if (*base == 0) 330 return (ENOMEM); 331 if (!request_region(*base, 256, "aic7xxx")) 332 return (ENOMEM); 333 return (0); 334 } 335 336 static int 337 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, 338 resource_size_t *bus_addr, 339 uint8_t __iomem **maddr) 340 { 341 resource_size_t start; 342 int error; 343 344 error = 0; 345 start = pci_resource_start(ahc->dev_softc, 1); 346 if (start != 0) { 347 *bus_addr = start; 348 if (!request_mem_region(start, 0x1000, "aic7xxx")) 349 error = ENOMEM; 350 if (error == 0) { 351 *maddr = ioremap(start, 256); 352 if (*maddr == NULL) { 353 error = ENOMEM; 354 release_mem_region(start, 0x1000); 355 } 356 } 357 } else 358 error = ENOMEM; 359 return (error); 360 } 361 362 int 363 ahc_pci_map_registers(struct ahc_softc *ahc) 364 { 365 uint32_t command; 366 resource_size_t base; 367 uint8_t __iomem *maddr; 368 int error; 369 370 /* 371 * If its allowed, we prefer memory mapped access. 372 */ 373 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4); 374 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 375 base = 0; 376 maddr = NULL; 377 error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr); 378 if (error == 0) { 379 ahc->platform_data->mem_busaddr = base; 380 ahc->tag = BUS_SPACE_MEMIO; 381 ahc->bsh.maddr = maddr; 382 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, 383 command | PCIM_CMD_MEMEN, 4); 384 385 /* 386 * Do a quick test to see if memory mapped 387 * I/O is functioning correctly. 388 */ 389 if (ahc_pci_test_register_access(ahc) != 0) { 390 391 printk("aic7xxx: PCI Device %d:%d:%d " 392 "failed memory mapped test. Using PIO.\n", 393 ahc_get_pci_bus(ahc->dev_softc), 394 ahc_get_pci_slot(ahc->dev_softc), 395 ahc_get_pci_function(ahc->dev_softc)); 396 iounmap(maddr); 397 release_mem_region(ahc->platform_data->mem_busaddr, 398 0x1000); 399 ahc->bsh.maddr = NULL; 400 maddr = NULL; 401 } else 402 command |= PCIM_CMD_MEMEN; 403 } else { 404 printk("aic7xxx: PCI%d:%d:%d MEM region 0x%llx " 405 "unavailable. Cannot memory map device.\n", 406 ahc_get_pci_bus(ahc->dev_softc), 407 ahc_get_pci_slot(ahc->dev_softc), 408 ahc_get_pci_function(ahc->dev_softc), 409 (unsigned long long)base); 410 } 411 412 /* 413 * We always prefer memory mapped access. 414 */ 415 if (maddr == NULL) { 416 417 error = ahc_linux_pci_reserve_io_region(ahc, &base); 418 if (error == 0) { 419 ahc->tag = BUS_SPACE_PIO; 420 ahc->bsh.ioport = (u_long)base; 421 command |= PCIM_CMD_PORTEN; 422 } else { 423 printk("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] " 424 "unavailable. Cannot map device.\n", 425 ahc_get_pci_bus(ahc->dev_softc), 426 ahc_get_pci_slot(ahc->dev_softc), 427 ahc_get_pci_function(ahc->dev_softc), 428 (unsigned long long)base); 429 } 430 } 431 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4); 432 return (error); 433 } 434 435 int 436 ahc_pci_map_int(struct ahc_softc *ahc) 437 { 438 int error; 439 440 error = request_irq(ahc->dev_softc->irq, ahc_linux_isr, 441 IRQF_SHARED, "aic7xxx", ahc); 442 if (error == 0) 443 ahc->platform_data->irq = ahc->dev_softc->irq; 444 445 return (-error); 446 } 447 448