Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | static int ahc_linux_pci_dev_probe(struct pci_dev *pdev, |
| 46 | const struct pci_device_id *ent); |
| 47 | static int ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, |
| 48 | u_long *base); |
| 49 | static int ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, |
| 50 | u_long *bus_addr, |
| 51 | uint8_t __iomem **maddr); |
| 52 | static void ahc_linux_pci_dev_remove(struct pci_dev *pdev); |
| 53 | |
| 54 | /* Define the macro locally since it's different for different class of chips. |
| 55 | */ |
| 56 | #define ID(x) ID_C(x, PCI_CLASS_STORAGE_SCSI) |
| 57 | |
| 58 | static struct pci_device_id ahc_linux_pci_id_table[] = { |
| 59 | /* aic7850 based controllers */ |
| 60 | ID(ID_AHA_2902_04_10_15_20C_30C), |
| 61 | /* aic7860 based controllers */ |
| 62 | ID(ID_AHA_2930CU), |
| 63 | ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK), |
| 64 | ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK), |
| 65 | ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK), |
| 66 | ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK), |
| 67 | /* aic7870 based controllers */ |
| 68 | ID(ID_AHA_2940), |
| 69 | ID(ID_AHA_3940), |
| 70 | ID(ID_AHA_398X), |
| 71 | ID(ID_AHA_2944), |
| 72 | ID(ID_AHA_3944), |
| 73 | ID(ID_AHA_4944), |
| 74 | /* aic7880 based controllers */ |
| 75 | ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK), |
| 76 | ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK), |
| 77 | ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK), |
| 78 | ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK), |
| 79 | ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK), |
| 80 | ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK), |
| 81 | ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK), |
| 82 | ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK), |
| 83 | ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK), |
| 84 | /* aic7890 based controllers */ |
| 85 | ID(ID_AHA_2930U2), |
| 86 | ID(ID_AHA_2940U2B), |
| 87 | ID(ID_AHA_2940U2_OEM), |
| 88 | ID(ID_AHA_2940U2), |
| 89 | ID(ID_AHA_2950U2B), |
| 90 | ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK), |
| 91 | ID(ID_AAA_131U2), |
| 92 | /* aic7890 based controllers */ |
| 93 | ID(ID_AHA_29160), |
| 94 | ID(ID_AHA_29160_CPQ), |
| 95 | ID(ID_AHA_29160N), |
| 96 | ID(ID_AHA_29160C), |
| 97 | ID(ID_AHA_29160B), |
| 98 | ID(ID_AHA_19160B), |
| 99 | ID(ID_AIC7892_ARO), |
| 100 | /* aic7892 based controllers */ |
| 101 | ID(ID_AHA_2940U_DUAL), |
| 102 | ID(ID_AHA_3940AU), |
| 103 | ID(ID_AHA_3944AU), |
| 104 | ID(ID_AIC7895_ARO), |
| 105 | ID(ID_AHA_3950U2B_0), |
| 106 | ID(ID_AHA_3950U2B_1), |
| 107 | ID(ID_AHA_3950U2D_0), |
| 108 | ID(ID_AHA_3950U2D_1), |
| 109 | ID(ID_AIC7896_ARO), |
| 110 | /* aic7899 based controllers */ |
| 111 | ID(ID_AHA_3960D), |
| 112 | ID(ID_AHA_3960D_CPQ), |
| 113 | ID(ID_AIC7899_ARO), |
| 114 | /* Generic chip probes for devices we don't know exactly. */ |
| 115 | ID(ID_AIC7850 & ID_DEV_VENDOR_MASK), |
| 116 | ID(ID_AIC7855 & ID_DEV_VENDOR_MASK), |
| 117 | ID(ID_AIC7859 & ID_DEV_VENDOR_MASK), |
| 118 | ID(ID_AIC7860 & ID_DEV_VENDOR_MASK), |
| 119 | ID(ID_AIC7870 & ID_DEV_VENDOR_MASK), |
| 120 | ID(ID_AIC7880 & ID_DEV_VENDOR_MASK), |
| 121 | ID16(ID_AIC7890 & ID_9005_GENERIC_MASK), |
| 122 | ID16(ID_AIC7892 & ID_9005_GENERIC_MASK), |
| 123 | ID(ID_AIC7895 & ID_DEV_VENDOR_MASK), |
| 124 | ID16(ID_AIC7896 & ID_9005_GENERIC_MASK), |
| 125 | ID16(ID_AIC7899 & ID_9005_GENERIC_MASK), |
| 126 | ID(ID_AIC7810 & ID_DEV_VENDOR_MASK), |
| 127 | ID(ID_AIC7815 & ID_DEV_VENDOR_MASK), |
| 128 | { 0 } |
| 129 | }; |
| 130 | |
| 131 | MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table); |
| 132 | |
| 133 | struct pci_driver aic7xxx_pci_driver = { |
| 134 | .name = "aic7xxx", |
| 135 | .probe = ahc_linux_pci_dev_probe, |
| 136 | .remove = ahc_linux_pci_dev_remove, |
| 137 | .id_table = ahc_linux_pci_id_table |
| 138 | }; |
| 139 | |
| 140 | static void |
| 141 | ahc_linux_pci_dev_remove(struct pci_dev *pdev) |
| 142 | { |
Christoph Hellwig | 3d65692 | 2005-06-11 00:14:30 +0200 | [diff] [blame] | 143 | struct ahc_softc *ahc = pci_get_drvdata(pdev); |
| 144 | u_long s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
James Bottomley | 97af50f | 2005-10-02 15:22:35 -0500 | [diff] [blame] | 146 | if (ahc->platform_data && ahc->platform_data->host) |
| 147 | scsi_remove_host(ahc->platform_data->host); |
| 148 | |
Christoph Hellwig | 3d65692 | 2005-06-11 00:14:30 +0200 | [diff] [blame] | 149 | ahc_lock(ahc, &s); |
| 150 | ahc_intr_enable(ahc, FALSE); |
| 151 | ahc_unlock(ahc, &s); |
| 152 | ahc_free(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
James Bottomley | 3a4f5c6 | 2005-08-13 09:42:45 -0500 | [diff] [blame] | 155 | static void |
| 156 | ahc_linux_pci_inherit_flags(struct ahc_softc *ahc) |
| 157 | { |
| 158 | struct pci_dev *pdev = ahc->dev_softc, *master_pdev; |
| 159 | unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); |
| 160 | |
| 161 | master_pdev = pci_get_slot(pdev->bus, master_devfn); |
| 162 | if (master_pdev) { |
| 163 | struct ahc_softc *master = pci_get_drvdata(master_pdev); |
| 164 | if (master) { |
| 165 | ahc->flags &= ~AHC_BIOS_ENABLED; |
| 166 | ahc->flags |= master->flags & AHC_BIOS_ENABLED; |
| 167 | |
| 168 | ahc->flags &= ~AHC_PRIMARY_CHANNEL; |
| 169 | ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL; |
| 170 | } else |
| 171 | printk(KERN_ERR "aic7xxx: no multichannel peer found!\n"); |
| 172 | pci_dev_put(master_pdev); |
| 173 | } |
| 174 | } |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | static int |
| 177 | ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| 178 | { |
| 179 | char buf[80]; |
| 180 | const uint64_t mask_39bit = 0x7FFFFFFFFFULL; |
| 181 | struct ahc_softc *ahc; |
| 182 | ahc_dev_softc_t pci; |
| 183 | struct ahc_pci_identity *entry; |
| 184 | char *name; |
| 185 | int error; |
James Bottomley | a89f29f6 | 2005-08-30 11:48:07 -0500 | [diff] [blame] | 186 | struct device *dev = &pdev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | pci = pdev; |
| 189 | entry = ahc_find_pci_device(pci); |
| 190 | if (entry == NULL) |
| 191 | return (-ENODEV); |
| 192 | |
| 193 | /* |
| 194 | * Allocate a softc for this card and |
| 195 | * set it up for attachment by our |
| 196 | * common detect routine. |
| 197 | */ |
| 198 | sprintf(buf, "ahc_pci:%d:%d:%d", |
| 199 | ahc_get_pci_bus(pci), |
| 200 | ahc_get_pci_slot(pci), |
| 201 | ahc_get_pci_function(pci)); |
| 202 | name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); |
| 203 | if (name == NULL) |
| 204 | return (-ENOMEM); |
| 205 | strcpy(name, buf); |
| 206 | ahc = ahc_alloc(NULL, name); |
| 207 | if (ahc == NULL) |
| 208 | return (-ENOMEM); |
| 209 | if (pci_enable_device(pdev)) { |
| 210 | ahc_free(ahc); |
| 211 | return (-ENODEV); |
| 212 | } |
| 213 | pci_set_master(pdev); |
| 214 | |
| 215 | if (sizeof(dma_addr_t) > 4 |
James Bottomley | a89f29f6 | 2005-08-30 11:48:07 -0500 | [diff] [blame] | 216 | && ahc->features & AHC_LARGE_SCBS |
| 217 | && dma_set_mask(dev, mask_39bit) == 0 |
| 218 | && dma_get_required_mask(dev) > DMA_32BIT_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | ahc->flags |= AHC_39BIT_ADDRESSING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } else { |
James Bottomley | a89f29f6 | 2005-08-30 11:48:07 -0500 | [diff] [blame] | 221 | if (dma_set_mask(dev, DMA_32BIT_MASK)) { |
Jesper Juhl | 4a6fae1 | 2006-04-23 20:16:02 +0200 | [diff] [blame^] | 222 | ahc_free(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); |
| 224 | return (-ENODEV); |
| 225 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } |
| 227 | ahc->dev_softc = pci; |
| 228 | error = ahc_pci_config(ahc, entry); |
| 229 | if (error != 0) { |
| 230 | ahc_free(ahc); |
| 231 | return (-error); |
| 232 | } |
James Bottomley | 3a4f5c6 | 2005-08-13 09:42:45 -0500 | [diff] [blame] | 233 | |
| 234 | /* |
| 235 | * Second Function PCI devices need to inherit some |
| 236 | * settings from function 0. |
| 237 | */ |
| 238 | if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0) |
| 239 | ahc_linux_pci_inherit_flags(ahc); |
| 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | pci_set_drvdata(pdev, ahc); |
Christoph Hellwig | dfd287f | 2005-06-28 16:49:44 +0200 | [diff] [blame] | 242 | ahc_linux_register_host(ahc, &aic7xxx_driver_template); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | return (0); |
| 244 | } |
| 245 | |
| 246 | int |
| 247 | ahc_linux_pci_init(void) |
| 248 | { |
| 249 | /* Translate error or zero return into zero or one */ |
| 250 | return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1; |
| 251 | } |
| 252 | |
| 253 | void |
| 254 | ahc_linux_pci_exit(void) |
| 255 | { |
| 256 | pci_unregister_driver(&aic7xxx_pci_driver); |
| 257 | } |
| 258 | |
| 259 | static int |
| 260 | ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base) |
| 261 | { |
| 262 | if (aic7xxx_allow_memio == 0) |
| 263 | return (ENOMEM); |
| 264 | |
| 265 | *base = pci_resource_start(ahc->dev_softc, 0); |
| 266 | if (*base == 0) |
| 267 | return (ENOMEM); |
| 268 | if (request_region(*base, 256, "aic7xxx") == 0) |
| 269 | return (ENOMEM); |
| 270 | return (0); |
| 271 | } |
| 272 | |
| 273 | static int |
| 274 | ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc, |
| 275 | u_long *bus_addr, |
| 276 | uint8_t __iomem **maddr) |
| 277 | { |
| 278 | u_long start; |
| 279 | int error; |
| 280 | |
| 281 | error = 0; |
| 282 | start = pci_resource_start(ahc->dev_softc, 1); |
| 283 | if (start != 0) { |
| 284 | *bus_addr = start; |
| 285 | if (request_mem_region(start, 0x1000, "aic7xxx") == 0) |
| 286 | error = ENOMEM; |
| 287 | if (error == 0) { |
| 288 | *maddr = ioremap_nocache(start, 256); |
| 289 | if (*maddr == NULL) { |
| 290 | error = ENOMEM; |
| 291 | release_mem_region(start, 0x1000); |
| 292 | } |
| 293 | } |
| 294 | } else |
| 295 | error = ENOMEM; |
| 296 | return (error); |
| 297 | } |
| 298 | |
| 299 | int |
| 300 | ahc_pci_map_registers(struct ahc_softc *ahc) |
| 301 | { |
| 302 | uint32_t command; |
| 303 | u_long base; |
| 304 | uint8_t __iomem *maddr; |
| 305 | int error; |
| 306 | |
| 307 | /* |
| 308 | * If its allowed, we prefer memory mapped access. |
| 309 | */ |
| 310 | command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4); |
| 311 | command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); |
| 312 | base = 0; |
| 313 | maddr = NULL; |
| 314 | error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr); |
| 315 | if (error == 0) { |
| 316 | ahc->platform_data->mem_busaddr = base; |
| 317 | ahc->tag = BUS_SPACE_MEMIO; |
| 318 | ahc->bsh.maddr = maddr; |
| 319 | ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, |
| 320 | command | PCIM_CMD_MEMEN, 4); |
| 321 | |
| 322 | /* |
| 323 | * Do a quick test to see if memory mapped |
| 324 | * I/O is functioning correctly. |
| 325 | */ |
| 326 | if (ahc_pci_test_register_access(ahc) != 0) { |
| 327 | |
| 328 | printf("aic7xxx: PCI Device %d:%d:%d " |
| 329 | "failed memory mapped test. Using PIO.\n", |
| 330 | ahc_get_pci_bus(ahc->dev_softc), |
| 331 | ahc_get_pci_slot(ahc->dev_softc), |
| 332 | ahc_get_pci_function(ahc->dev_softc)); |
| 333 | iounmap(maddr); |
| 334 | release_mem_region(ahc->platform_data->mem_busaddr, |
| 335 | 0x1000); |
| 336 | ahc->bsh.maddr = NULL; |
| 337 | maddr = NULL; |
| 338 | } else |
| 339 | command |= PCIM_CMD_MEMEN; |
| 340 | } else { |
| 341 | printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx " |
| 342 | "unavailable. Cannot memory map device.\n", |
| 343 | ahc_get_pci_bus(ahc->dev_softc), |
| 344 | ahc_get_pci_slot(ahc->dev_softc), |
| 345 | ahc_get_pci_function(ahc->dev_softc), |
| 346 | base); |
| 347 | } |
| 348 | |
| 349 | /* |
| 350 | * We always prefer memory mapped access. |
| 351 | */ |
| 352 | if (maddr == NULL) { |
| 353 | |
| 354 | error = ahc_linux_pci_reserve_io_region(ahc, &base); |
| 355 | if (error == 0) { |
| 356 | ahc->tag = BUS_SPACE_PIO; |
| 357 | ahc->bsh.ioport = base; |
| 358 | command |= PCIM_CMD_PORTEN; |
| 359 | } else { |
| 360 | printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] " |
| 361 | "unavailable. Cannot map device.\n", |
| 362 | ahc_get_pci_bus(ahc->dev_softc), |
| 363 | ahc_get_pci_slot(ahc->dev_softc), |
| 364 | ahc_get_pci_function(ahc->dev_softc), |
| 365 | base); |
| 366 | } |
| 367 | } |
| 368 | ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4); |
| 369 | return (error); |
| 370 | } |
| 371 | |
| 372 | int |
| 373 | ahc_pci_map_int(struct ahc_softc *ahc) |
| 374 | { |
| 375 | int error; |
| 376 | |
| 377 | error = request_irq(ahc->dev_softc->irq, ahc_linux_isr, |
| 378 | SA_SHIRQ, "aic7xxx", ahc); |
| 379 | if (error == 0) |
| 380 | ahc->platform_data->irq = ahc->dev_softc->irq; |
| 381 | |
| 382 | return (-error); |
| 383 | } |
| 384 | |