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: aic7xxx_osm_pci.c,v 1.1.1.1 2008/10/15 03:26:55 james26_jang Exp $ 40 */ 41 42#include "aic7xxx_osm.h" 43 44#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) 45struct pci_device_id 46{ 47}; 48#endif 49 50static int ahc_linux_pci_dev_probe(struct pci_dev *pdev, 51 const struct pci_device_id *ent); 52static int ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, 53 u_long *base); 54#ifdef MMAPIO 55static int ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, 56 u_long *bus_addr, 57 uint8_t **maddr); 58#endif /* MMAPIO */ 59#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 60static void ahc_linux_pci_dev_remove(struct pci_dev *pdev); 61 62/* We do our own ID filtering. So, grab all SCSI storage class devices. */ 63static struct pci_device_id ahc_linux_pci_id_table[] = { 64 { 65 0x9004, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 66 PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0 67 }, 68 { 69 0x9005, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 70 PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0 71 }, 72 { 0 } 73}; 74 75MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table); 76 77struct pci_driver aic7xxx_pci_driver = { 78 name: "aic7xxx", 79 probe: ahc_linux_pci_dev_probe, 80 remove: ahc_linux_pci_dev_remove, 81 id_table: ahc_linux_pci_id_table 82}; 83 84static void 85ahc_linux_pci_dev_remove(struct pci_dev *pdev) 86{ 87 struct ahc_softc *ahc; 88 u_long l; 89 90 /* 91 * We should be able to just perform 92 * the free directly, but check our 93 * list for extra sanity. 94 */ 95 ahc_list_lock(&l); 96 ahc = ahc_find_softc((struct ahc_softc *)pdev->driver_data); 97 if (ahc != NULL) { 98 u_long s; 99 100 ahc_lock(ahc, &s); 101 ahc_intr_enable(ahc, FALSE); 102 ahc_unlock(ahc, &s); 103 ahc_free(ahc); 104 } 105 ahc_list_unlock(&l); 106} 107#endif /* !LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) */ 108 109static int 110ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 111{ 112 char buf[80]; 113 struct ahc_softc *ahc; 114 ahc_dev_softc_t pci; 115 struct ahc_pci_identity *entry; 116 char *name; 117 int error; 118 119 /* 120 * Some BIOSen report the same device multiple times. 121 */ 122 TAILQ_FOREACH(ahc, &ahc_tailq, links) { 123 struct pci_dev *probed_pdev; 124 125 probed_pdev = ahc->dev_softc; 126 if (probed_pdev->bus->number == pdev->bus->number 127 && probed_pdev->devfn == pdev->devfn) 128 break; 129 } 130 if (ahc != NULL) { 131 /* Skip duplicate. */ 132 return (-ENODEV); 133 } 134 135 pci = pdev; 136 entry = ahc_find_pci_device(pci); 137 if (entry == NULL) 138 return (-ENODEV); 139 140 /* 141 * Allocate a softc for this card and 142 * set it up for attachment by our 143 * common detect routine. 144 */ 145 sprintf(buf, "ahc_pci:%d:%d:%d", 146 ahc_get_pci_bus(pci), 147 ahc_get_pci_slot(pci), 148 ahc_get_pci_function(pci)); 149 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 150 if (name == NULL) 151 return (-ENOMEM); 152 strcpy(name, buf); 153 ahc = ahc_alloc(NULL, name); 154 if (ahc == NULL) 155 return (-ENOMEM); 156#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 157 if (pci_enable_device(pdev)) { 158 ahc_free(ahc); 159 return (-ENODEV); 160 } 161 pci_set_master(pdev); 162 163 if (sizeof(bus_addr_t) > 4 164#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3) 165 && ahc_linux_get_memsize() > 0x80000000 166 && pci_set_dma_mask(pdev, 0x7FFFFFFFFFULL) == 0) { 167#else 168 && ahc_linux_get_memsize() > 0x80000000) { 169 170 ahc->dev_softc->dma_mask = 171 (bus_addr_t)(0x7FFFFFFFFFULL & (bus_addr_t)~0); 172#endif 173 ahc->flags |= AHC_39BIT_ADDRESSING; 174 ahc->platform_data->hw_dma_mask = 175 (bus_addr_t)(0x7FFFFFFFFFULL & (bus_addr_t)~0); 176 } 177#endif 178 ahc->dev_softc = pci; 179 error = ahc_pci_config(ahc, entry); 180 if (error != 0) { 181 ahc_free(ahc); 182 return (-error); 183 } 184#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 185 pci_set_drvdata(pdev, ahc); 186 if (aic7xxx_detect_complete) 187 ahc_linux_register_host(ahc, aic7xxx_driver_template); 188#endif 189 return (0); 190} 191 192int 193ahc_linux_pci_probe(Scsi_Host_Template *template) 194{ 195#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 196 return (pci_module_init(&aic7xxx_pci_driver)); 197#else 198 struct pci_dev *pdev; 199 u_int class; 200 int found; 201 202 /* If we don't have a PCI bus, we can't find any adapters. */ 203 if (pci_present() == 0) 204 return (0); 205 206 found = 0; 207 pdev = NULL; 208 class = PCI_CLASS_STORAGE_SCSI << 8; 209 while ((pdev = pci_find_class(class, pdev)) != NULL) { 210 ahc_dev_softc_t pci; 211 int error; 212 213 pci = pdev; 214 error = ahc_linux_pci_dev_probe(pdev, /*pci_devid*/NULL); 215 if (error == 0) 216 found++; 217 } 218 return (found); 219#endif 220} 221 222static int 223ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base) 224{ 225#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0) 226 *base = pci_resource_start(ahc->dev_softc, 0); 227#else 228 *base = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS, 4); 229 *base &= PCI_BASE_ADDRESS_IO_MASK; 230#endif 231 if (*base == 0) 232 return (ENOMEM); 233#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) 234 if (check_region(*base, 256) != 0) 235 return (ENOMEM); 236 else 237 request_region(*base, 256, "aic7xxx"); 238#else 239 if (request_region(*base, 256, "aic7xxx") == 0) 240 return (ENOMEM); 241#endif 242 return (0); 243} 244 245#ifdef MMAPIO 246static int 247ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, 248 u_long *bus_addr, 249 uint8_t **maddr) 250{ 251 u_long start; 252 u_long base_page; 253 u_long base_offset; 254 int error; 255 256 error = 0; 257#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0) 258 start = pci_resource_start(ahc->dev_softc, 1); 259 base_page = start & PAGE_MASK; 260 base_offset = start - base_page; 261#else 262 start = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS+4, 4); 263 base_offset = start & PCI_BASE_ADDRESS_MEM_MASK; 264 base_page = base_offset & PAGE_MASK; 265 base_offset -= base_page; 266#endif 267 if (start != 0) { 268 *bus_addr = start; 269#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 270 if (request_mem_region(start, 0x1000, "aic7xxx") == 0) 271 error = ENOMEM; 272#endif 273 if (error == 0) { 274 *maddr = ioremap_nocache(base_page, base_offset + 256); 275 if (*maddr == NULL) { 276 error = ENOMEM; 277#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 278 release_mem_region(start, 0x1000); 279#endif 280 } else 281 *maddr += base_offset; 282 } 283 } else 284 error = ENOMEM; 285 return (error); 286} 287#endif /* MMAPIO */ 288 289int 290ahc_pci_map_registers(struct ahc_softc *ahc) 291{ 292 uint32_t command; 293 u_long base; 294 uint8_t *maddr; 295 int error; 296 297 /* 298 * If its allowed, we prefer memory mapped access. 299 */ 300 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4); 301 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 302 base = 0; 303 maddr = NULL; 304#ifdef MMAPIO 305 error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr); 306 if (error == 0) { 307 ahc->platform_data->mem_busaddr = base; 308 ahc->tag = BUS_SPACE_MEMIO; 309 ahc->bsh.maddr = maddr; 310 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, 311 command | PCIM_CMD_MEMEN, 4); 312 313 /* 314 * Do a quick test to see if memory mapped 315 * I/O is functioning correctly. 316 */ 317 if (ahc_inb(ahc, HCNTRL) == 0xFF) { 318 319 printf("aic7xxx: PCI Device %d:%d:%d " 320 "failed memory mapped test\n", 321 ahc_get_pci_bus(ahc->dev_softc), 322 ahc_get_pci_slot(ahc->dev_softc), 323 ahc_get_pci_function(ahc->dev_softc)); 324 iounmap((void *)((u_long)maddr & PAGE_MASK)); 325#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 326 release_mem_region(ahc->platform_data->mem_busaddr, 327 0x1000); 328#endif 329 ahc->bsh.maddr = NULL; 330 maddr = NULL; 331 } else 332 command |= PCIM_CMD_MEMEN; 333 } else { 334 printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx " 335 "unavailable. Cannot memory map device.\n", 336 ahc_get_pci_bus(ahc->dev_softc), 337 ahc_get_pci_slot(ahc->dev_softc), 338 ahc_get_pci_function(ahc->dev_softc), 339 base); 340 } 341#endif /* MMAPIO */ 342 343 /* 344 * We always prefer memory mapped access. 345 */ 346 if (maddr == NULL) { 347 348 error = ahc_linux_pci_reserve_io_region(ahc, &base); 349 if (error == 0) { 350 ahc->tag = BUS_SPACE_PIO; 351 ahc->bsh.ioport = base; 352 command |= PCIM_CMD_PORTEN; 353 } else { 354 printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] " 355 "unavailable. Cannot map device.\n", 356 ahc_get_pci_bus(ahc->dev_softc), 357 ahc_get_pci_slot(ahc->dev_softc), 358 ahc_get_pci_function(ahc->dev_softc), 359 base); 360 } 361 } 362 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4); 363 return (error); 364} 365 366int 367ahc_pci_map_int(struct ahc_softc *ahc) 368{ 369 int error; 370 371 error = request_irq(ahc->dev_softc->irq, ahc_linux_isr, 372 SA_SHIRQ, "aic7xxx", ahc); 373 if (error == 0) 374 ahc->platform_data->irq = ahc->dev_softc->irq; 375 376 return (-error); 377} 378 379void 380ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state) 381{ 382#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) 383 pci_set_power_state(ahc->dev_softc, new_state); 384#else 385 uint32_t cap; 386 u_int cap_offset; 387 388 /* 389 * Traverse the capability list looking for 390 * the power management capability. 391 */ 392 cap = 0; 393 cap_offset = ahc_pci_read_config(ahc->dev_softc, 394 PCIR_CAP_PTR, /*bytes*/1); 395 while (cap_offset != 0) { 396 397 cap = ahc_pci_read_config(ahc->dev_softc, 398 cap_offset, /*bytes*/4); 399 if ((cap & 0xFF) == 1 400 && ((cap >> 16) & 0x3) > 0) { 401 uint32_t pm_control; 402 403 pm_control = ahc_pci_read_config(ahc->dev_softc, 404 cap_offset + 4, 405 /*bytes*/4); 406 pm_control &= ~0x3; 407 pm_control |= new_state; 408 ahc_pci_write_config(ahc->dev_softc, 409 cap_offset + 4, 410 pm_control, /*bytes*/2); 411 break; 412 } 413 cap_offset = (cap >> 8) & 0xFF; 414 } 415#endif 416} 417