1 /* 2 * pata_serverworks.c - Serverworks PATA for new ATA layer 3 * (C) 2005 Red Hat Inc 4 * (C) 2010 Bartlomiej Zolnierkiewicz 5 * 6 * based upon 7 * 8 * serverworks.c 9 * 10 * Copyright (C) 1998-2000 Michel Aubry 11 * Copyright (C) 1998-2000 Andrzej Krzysztofowicz 12 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org> 13 * Portions copyright (c) 2001 Sun Microsystems 14 * 15 * 16 * RCC/ServerWorks IDE driver for Linux 17 * 18 * OSB4: `Open South Bridge' IDE Interface (fn 1) 19 * supports UDMA mode 2 (33 MB/s) 20 * 21 * CSB5: `Champion South Bridge' IDE Interface (fn 1) 22 * all revisions support UDMA mode 4 (66 MB/s) 23 * revision A2.0 and up support UDMA mode 5 (100 MB/s) 24 * 25 * *** The CSB5 does not provide ANY register *** 26 * *** to detect 80-conductor cable presence. *** 27 * 28 * CSB6: `Champion South Bridge' IDE Interface (optional: third channel) 29 * 30 * Documentation: 31 * Available under NDA only. Errata info very hard to get. 32 */ 33 34 #include <linux/kernel.h> 35 #include <linux/module.h> 36 #include <linux/pci.h> 37 #include <linux/init.h> 38 #include <linux/blkdev.h> 39 #include <linux/delay.h> 40 #include <scsi/scsi_host.h> 41 #include <linux/libata.h> 42 43 #define DRV_NAME "pata_serverworks" 44 #define DRV_VERSION "0.4.3" 45 46 #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */ 47 #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */ 48 49 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5 50 * can overrun their FIFOs when used with the CSB5 */ 51 52 static const char *csb_bad_ata100[] = { 53 "ST320011A", 54 "ST340016A", 55 "ST360021A", 56 "ST380021A", 57 NULL 58 }; 59 60 /** 61 * oem_cable - Dell/Sun serverworks cable detection 62 * @ap: ATA port to do cable detect 63 * 64 * Dell PowerEdge and Sun Cobalt 'Alpine' hide the 40/80 pin select 65 * for their interfaces in the top two bits of the subsystem ID. 66 */ 67 68 static int oem_cable(struct ata_port *ap) 69 { 70 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 71 72 if (pdev->subsystem_device & (1 << (ap->port_no + 14))) 73 return ATA_CBL_PATA80; 74 return ATA_CBL_PATA40; 75 } 76 77 struct sv_cable_table { 78 int device; 79 int subvendor; 80 int (*cable_detect)(struct ata_port *ap); 81 }; 82 83 static struct sv_cable_table cable_detect[] = { 84 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_DELL, oem_cable }, 85 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_VENDOR_ID_DELL, oem_cable }, 86 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_SUN, oem_cable }, 87 { PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, ata_cable_40wire }, 88 { PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, ata_cable_unknown }, 89 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, ata_cable_unknown }, 90 { PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, ata_cable_unknown }, 91 { PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, ata_cable_unknown }, 92 { } 93 }; 94 95 /** 96 * serverworks_cable_detect - cable detection 97 * @ap: ATA port 98 * 99 * Perform cable detection according to the device and subvendor 100 * identifications 101 */ 102 103 static int serverworks_cable_detect(struct ata_port *ap) 104 { 105 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 106 struct sv_cable_table *cb = cable_detect; 107 108 while(cb->device) { 109 if (cb->device == pdev->device && 110 (cb->subvendor == pdev->subsystem_vendor || 111 cb->subvendor == PCI_ANY_ID)) { 112 return cb->cable_detect(ap); 113 } 114 cb++; 115 } 116 117 BUG(); 118 return -1; /* kill compiler warning */ 119 } 120 121 /** 122 * serverworks_is_csb - Check for CSB or OSB 123 * @pdev: PCI device to check 124 * 125 * Returns true if the device being checked is known to be a CSB 126 * series device. 127 */ 128 129 static u8 serverworks_is_csb(struct pci_dev *pdev) 130 { 131 switch (pdev->device) { 132 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE: 133 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE: 134 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2: 135 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE: 136 return 1; 137 default: 138 break; 139 } 140 return 0; 141 } 142 143 /** 144 * serverworks_osb4_filter - mode selection filter 145 * @adev: ATA device 146 * @mask: Mask of proposed modes 147 * 148 * Filter the offered modes for the device to apply controller 149 * specific rules. OSB4 requires no UDMA for disks due to a FIFO 150 * bug we hit. 151 */ 152 153 static unsigned long serverworks_osb4_filter(struct ata_device *adev, unsigned long mask) 154 { 155 if (adev->class == ATA_DEV_ATA) 156 mask &= ~ATA_MASK_UDMA; 157 return mask; 158 } 159 160 161 /** 162 * serverworks_csb_filter - mode selection filter 163 * @adev: ATA device 164 * @mask: Mask of proposed modes 165 * 166 * Check the blacklist and disable UDMA5 if matched 167 */ 168 169 static unsigned long serverworks_csb_filter(struct ata_device *adev, unsigned long mask) 170 { 171 const char *p; 172 char model_num[ATA_ID_PROD_LEN + 1]; 173 int i; 174 175 /* Disk, UDMA */ 176 if (adev->class != ATA_DEV_ATA) 177 return mask; 178 179 /* Actually do need to check */ 180 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 181 182 for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) { 183 if (!strcmp(p, model_num)) 184 mask &= ~(0xE0 << ATA_SHIFT_UDMA); 185 } 186 return mask; 187 } 188 189 /** 190 * serverworks_set_piomode - set initial PIO mode data 191 * @ap: ATA interface 192 * @adev: ATA device 193 * 194 * Program the OSB4/CSB5 timing registers for PIO. The PIO register 195 * load is done as a simple lookup. 196 */ 197 static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev) 198 { 199 static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 }; 200 int offset = 1 + 2 * ap->port_no - adev->devno; 201 int devbits = (2 * ap->port_no + adev->devno) * 4; 202 u16 csb5_pio; 203 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 204 int pio = adev->pio_mode - XFER_PIO_0; 205 206 pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]); 207 208 /* The OSB4 just requires the timing but the CSB series want the 209 mode number as well */ 210 if (serverworks_is_csb(pdev)) { 211 pci_read_config_word(pdev, 0x4A, &csb5_pio); 212 csb5_pio &= ~(0x0F << devbits); 213 pci_write_config_word(pdev, 0x4A, csb5_pio | (pio << devbits)); 214 } 215 } 216 217 /** 218 * serverworks_set_dmamode - set initial DMA mode data 219 * @ap: ATA interface 220 * @adev: ATA device 221 * 222 * Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5 223 * chipset. The MWDMA mode values are pulled from a lookup table 224 * while the chipset uses mode number for UDMA. 225 */ 226 227 static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev) 228 { 229 static const u8 dma_mode[] = { 0x77, 0x21, 0x20 }; 230 int offset = 1 + 2 * ap->port_no - adev->devno; 231 int devbits = 2 * ap->port_no + adev->devno; 232 u8 ultra; 233 u8 ultra_cfg; 234 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 235 236 pci_read_config_byte(pdev, 0x54, &ultra_cfg); 237 pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra); 238 ultra &= ~(0x0F << (adev->devno * 4)); 239 240 if (adev->dma_mode >= XFER_UDMA_0) { 241 pci_write_config_byte(pdev, 0x44 + offset, 0x20); 242 243 ultra |= (adev->dma_mode - XFER_UDMA_0) 244 << (adev->devno * 4); 245 ultra_cfg |= (1 << devbits); 246 } else { 247 pci_write_config_byte(pdev, 0x44 + offset, 248 dma_mode[adev->dma_mode - XFER_MW_DMA_0]); 249 ultra_cfg &= ~(1 << devbits); 250 } 251 pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra); 252 pci_write_config_byte(pdev, 0x54, ultra_cfg); 253 } 254 255 static struct scsi_host_template serverworks_sht = { 256 ATA_BMDMA_SHT(DRV_NAME), 257 }; 258 259 static struct ata_port_operations serverworks_osb4_port_ops = { 260 .inherits = &ata_bmdma_port_ops, 261 .cable_detect = serverworks_cable_detect, 262 .mode_filter = serverworks_osb4_filter, 263 .set_piomode = serverworks_set_piomode, 264 .set_dmamode = serverworks_set_dmamode, 265 }; 266 267 static struct ata_port_operations serverworks_csb_port_ops = { 268 .inherits = &serverworks_osb4_port_ops, 269 .mode_filter = serverworks_csb_filter, 270 }; 271 272 static int serverworks_fixup_osb4(struct pci_dev *pdev) 273 { 274 u32 reg; 275 struct pci_dev *isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS, 276 PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL); 277 if (isa_dev) { 278 pci_read_config_dword(isa_dev, 0x64, ®); 279 reg &= ~0x00002000; /* disable 600ns interrupt mask */ 280 if (!(reg & 0x00004000)) 281 printk(KERN_DEBUG DRV_NAME ": UDMA not BIOS enabled.\n"); 282 reg |= 0x00004000; /* enable UDMA/33 support */ 283 pci_write_config_dword(isa_dev, 0x64, reg); 284 pci_dev_put(isa_dev); 285 return 0; 286 } 287 printk(KERN_WARNING DRV_NAME ": Unable to find bridge.\n"); 288 return -ENODEV; 289 } 290 291 static int serverworks_fixup_csb(struct pci_dev *pdev) 292 { 293 u8 btr; 294 295 /* Third Channel Test */ 296 if (!(PCI_FUNC(pdev->devfn) & 1)) { 297 struct pci_dev * findev = NULL; 298 u32 reg4c = 0; 299 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS, 300 PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL); 301 if (findev) { 302 pci_read_config_dword(findev, 0x4C, ®4c); 303 reg4c &= ~0x000007FF; 304 reg4c |= 0x00000040; 305 reg4c |= 0x00000020; 306 pci_write_config_dword(findev, 0x4C, reg4c); 307 pci_dev_put(findev); 308 } 309 } else { 310 struct pci_dev * findev = NULL; 311 u8 reg41 = 0; 312 313 findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS, 314 PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL); 315 if (findev) { 316 pci_read_config_byte(findev, 0x41, ®41); 317 reg41 &= ~0x40; 318 pci_write_config_byte(findev, 0x41, reg41); 319 pci_dev_put(findev); 320 } 321 } 322 /* setup the UDMA Control register 323 * 324 * 1. clear bit 6 to enable DMA 325 * 2. enable DMA modes with bits 0-1 326 * 00 : legacy 327 * 01 : udma2 328 * 10 : udma2/udma4 329 * 11 : udma2/udma4/udma5 330 */ 331 pci_read_config_byte(pdev, 0x5A, &btr); 332 btr &= ~0x40; 333 if (!(PCI_FUNC(pdev->devfn) & 1)) 334 btr |= 0x2; 335 else 336 btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2; 337 pci_write_config_byte(pdev, 0x5A, btr); 338 339 return btr; 340 } 341 342 static void serverworks_fixup_ht1000(struct pci_dev *pdev) 343 { 344 u8 btr; 345 /* Setup HT1000 SouthBridge Controller - Single Channel Only */ 346 pci_read_config_byte(pdev, 0x5A, &btr); 347 btr &= ~0x40; 348 btr |= 0x3; 349 pci_write_config_byte(pdev, 0x5A, btr); 350 } 351 352 static int serverworks_fixup(struct pci_dev *pdev) 353 { 354 int rc = 0; 355 356 /* Force master latency timer to 64 PCI clocks */ 357 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40); 358 359 switch (pdev->device) { 360 case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE: 361 rc = serverworks_fixup_osb4(pdev); 362 break; 363 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE: 364 ata_pci_bmdma_clear_simplex(pdev); 365 /* fall through */ 366 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE: 367 case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2: 368 rc = serverworks_fixup_csb(pdev); 369 break; 370 case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE: 371 serverworks_fixup_ht1000(pdev); 372 break; 373 } 374 375 return rc; 376 } 377 378 static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 379 { 380 static const struct ata_port_info info[4] = { 381 { /* OSB4 */ 382 .flags = ATA_FLAG_SLAVE_POSS, 383 .pio_mask = ATA_PIO4, 384 .mwdma_mask = ATA_MWDMA2, 385 .udma_mask = ATA_UDMA2, 386 .port_ops = &serverworks_osb4_port_ops 387 }, { /* OSB4 no UDMA */ 388 .flags = ATA_FLAG_SLAVE_POSS, 389 .pio_mask = ATA_PIO4, 390 .mwdma_mask = ATA_MWDMA2, 391 /* No UDMA */ 392 .port_ops = &serverworks_osb4_port_ops 393 }, { /* CSB5 */ 394 .flags = ATA_FLAG_SLAVE_POSS, 395 .pio_mask = ATA_PIO4, 396 .mwdma_mask = ATA_MWDMA2, 397 .udma_mask = ATA_UDMA4, 398 .port_ops = &serverworks_csb_port_ops 399 }, { /* CSB5 - later revisions*/ 400 .flags = ATA_FLAG_SLAVE_POSS, 401 .pio_mask = ATA_PIO4, 402 .mwdma_mask = ATA_MWDMA2, 403 .udma_mask = ATA_UDMA5, 404 .port_ops = &serverworks_csb_port_ops 405 } 406 }; 407 const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL }; 408 int rc; 409 410 rc = pcim_enable_device(pdev); 411 if (rc) 412 return rc; 413 414 rc = serverworks_fixup(pdev); 415 416 /* OSB4 : South Bridge and IDE */ 417 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) { 418 /* Select non UDMA capable OSB4 if we can't do fixups */ 419 if (rc < 0) 420 ppi[0] = &info[1]; 421 } 422 /* setup CSB5/CSB6 : South Bridge and IDE option RAID */ 423 else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) || 424 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) || 425 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) { 426 427 /* If the returned btr is the newer revision then 428 select the right info block */ 429 if (rc == 3) 430 ppi[0] = &info[3]; 431 432 /* Is this the 3rd channel CSB6 IDE ? */ 433 if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) 434 ppi[1] = &ata_dummy_port_info; 435 } 436 437 return ata_pci_bmdma_init_one(pdev, ppi, &serverworks_sht, NULL, 0); 438 } 439 440 #ifdef CONFIG_PM 441 static int serverworks_reinit_one(struct pci_dev *pdev) 442 { 443 struct ata_host *host = pci_get_drvdata(pdev); 444 int rc; 445 446 rc = ata_pci_device_do_resume(pdev); 447 if (rc) 448 return rc; 449 450 (void)serverworks_fixup(pdev); 451 452 ata_host_resume(host); 453 return 0; 454 } 455 #endif 456 457 static const struct pci_device_id serverworks[] = { 458 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0}, 459 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2}, 460 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2}, 461 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2}, 462 { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2}, 463 464 { }, 465 }; 466 467 static struct pci_driver serverworks_pci_driver = { 468 .name = DRV_NAME, 469 .id_table = serverworks, 470 .probe = serverworks_init_one, 471 .remove = ata_pci_remove_one, 472 #ifdef CONFIG_PM 473 .suspend = ata_pci_device_suspend, 474 .resume = serverworks_reinit_one, 475 #endif 476 }; 477 478 module_pci_driver(serverworks_pci_driver); 479 480 MODULE_AUTHOR("Alan Cox"); 481 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6"); 482 MODULE_LICENSE("GPL"); 483 MODULE_DEVICE_TABLE(pci, serverworks); 484 MODULE_VERSION(DRV_VERSION); 485