| 1 | /* |
| 2 | * Copyright (C) 1998-2000 Michel Aubry |
| 3 | * Copyright (C) 1998-2000 Andrzej Krzysztofowicz |
| 4 | * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org> |
| 5 | * Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz |
| 6 | * Portions copyright (c) 2001 Sun Microsystems |
| 7 | * |
| 8 | * |
| 9 | * RCC/ServerWorks IDE driver for Linux |
| 10 | * |
| 11 | * OSB4: `Open South Bridge' IDE Interface (fn 1) |
| 12 | * supports UDMA mode 2 (33 MB/s) |
| 13 | * |
| 14 | * CSB5: `Champion South Bridge' IDE Interface (fn 1) |
| 15 | * all revisions support UDMA mode 4 (66 MB/s) |
| 16 | * revision A2.0 and up support UDMA mode 5 (100 MB/s) |
| 17 | * |
| 18 | * *** The CSB5 does not provide ANY register *** |
| 19 | * *** to detect 80-conductor cable presence. *** |
| 20 | * |
| 21 | * CSB6: `Champion South Bridge' IDE Interface (optional: third channel) |
| 22 | * |
| 23 | * HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE |
| 24 | * controller same as the CSB6. Single channel ATA100 only. |
| 25 | * |
| 26 | * Documentation: |
| 27 | * Available under NDA only. Errata info very hard to get. |
| 28 | * |
| 29 | */ |
| 30 | |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/pci.h> |
| 35 | #include <linux/ide.h> |
| 36 | #include <linux/init.h> |
| 37 | |
| 38 | #include <asm/io.h> |
| 39 | |
| 40 | #define DRV_NAME "serverworks" |
| 41 | |
| 42 | #define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */ |
| 43 | #define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */ |
| 44 | |
| 45 | /* Seagate Barracuda ATA IV Family drives in UDMA mode 5 |
| 46 | * can overrun their FIFOs when used with the CSB5 */ |
| 47 | static const char *svwks_bad_ata100[] = { |
| 48 | "ST320011A", |
| 49 | "ST340016A", |
| 50 | "ST360021A", |
| 51 | "ST380021A", |
| 52 | NULL |
| 53 | }; |
| 54 | |
| 55 | static int check_in_drive_lists (ide_drive_t *drive, const char **list) |
| 56 | { |
| 57 | char *m = (char *)&drive->id[ATA_ID_PROD]; |
| 58 | |
| 59 | while (*list) |
| 60 | if (!strcmp(*list++, m)) |
| 61 | return 1; |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static u8 svwks_udma_filter(ide_drive_t *drive) |
| 66 | { |
| 67 | struct pci_dev *dev = to_pci_dev(drive->hwif->dev); |
| 68 | |
| 69 | if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) { |
| 70 | return 0x1f; |
| 71 | } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) { |
| 72 | return 0x07; |
| 73 | } else { |
| 74 | u8 btr = 0, mode, mask; |
| 75 | |
| 76 | pci_read_config_byte(dev, 0x5A, &btr); |
| 77 | mode = btr & 0x3; |
| 78 | |
| 79 | /* If someone decides to do UDMA133 on CSB5 the same |
| 80 | issue will bite so be inclusive */ |
| 81 | if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100)) |
| 82 | mode = 2; |
| 83 | |
| 84 | switch(mode) { |
| 85 | case 3: mask = 0x3f; break; |
| 86 | case 2: mask = 0x1f; break; |
| 87 | case 1: mask = 0x07; break; |
| 88 | default: mask = 0x00; break; |
| 89 | } |
| 90 | |
| 91 | return mask; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | static u8 svwks_csb_check (struct pci_dev *dev) |
| 96 | { |
| 97 | switch (dev->device) { |
| 98 | case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE: |
| 99 | case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE: |
| 100 | case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2: |
| 101 | case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE: |
| 102 | return 1; |
| 103 | default: |
| 104 | break; |
| 105 | } |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static void svwks_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) |
| 110 | { |
| 111 | static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 }; |
| 112 | static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 }; |
| 113 | |
| 114 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 115 | const u8 pio = drive->pio_mode - XFER_PIO_0; |
| 116 | |
| 117 | pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]); |
| 118 | |
| 119 | if (svwks_csb_check(dev)) { |
| 120 | u16 csb_pio = 0; |
| 121 | |
| 122 | pci_read_config_word(dev, 0x4a, &csb_pio); |
| 123 | |
| 124 | csb_pio &= ~(0x0f << (4 * drive->dn)); |
| 125 | csb_pio |= (pio << (4 * drive->dn)); |
| 126 | |
| 127 | pci_write_config_word(dev, 0x4a, csb_pio); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | static void svwks_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive) |
| 132 | { |
| 133 | static const u8 udma_modes[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 }; |
| 134 | static const u8 dma_modes[] = { 0x77, 0x21, 0x20 }; |
| 135 | static const u8 drive_pci2[] = { 0x45, 0x44, 0x47, 0x46 }; |
| 136 | |
| 137 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 138 | const u8 speed = drive->dma_mode; |
| 139 | u8 unit = drive->dn & 1; |
| 140 | |
| 141 | u8 ultra_enable = 0, ultra_timing = 0, dma_timing = 0; |
| 142 | |
| 143 | pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing); |
| 144 | pci_read_config_byte(dev, 0x54, &ultra_enable); |
| 145 | |
| 146 | ultra_timing &= ~(0x0F << (4*unit)); |
| 147 | ultra_enable &= ~(0x01 << drive->dn); |
| 148 | |
| 149 | if (speed >= XFER_UDMA_0) { |
| 150 | dma_timing |= dma_modes[2]; |
| 151 | ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit)); |
| 152 | ultra_enable |= (0x01 << drive->dn); |
| 153 | } else if (speed >= XFER_MW_DMA_0) |
| 154 | dma_timing |= dma_modes[speed - XFER_MW_DMA_0]; |
| 155 | |
| 156 | pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing); |
| 157 | pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing); |
| 158 | pci_write_config_byte(dev, 0x54, ultra_enable); |
| 159 | } |
| 160 | |
| 161 | static int init_chipset_svwks(struct pci_dev *dev) |
| 162 | { |
| 163 | unsigned int reg; |
| 164 | u8 btr; |
| 165 | |
| 166 | /* force Master Latency Timer value to 64 PCICLKs */ |
| 167 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40); |
| 168 | |
| 169 | /* OSB4 : South Bridge and IDE */ |
| 170 | if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) { |
| 171 | struct pci_dev *isa_dev = |
| 172 | pci_get_device(PCI_VENDOR_ID_SERVERWORKS, |
| 173 | PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL); |
| 174 | if (isa_dev) { |
| 175 | pci_read_config_dword(isa_dev, 0x64, ®); |
| 176 | reg &= ~0x00002000; /* disable 600ns interrupt mask */ |
| 177 | if(!(reg & 0x00004000)) |
| 178 | printk(KERN_DEBUG DRV_NAME " %s: UDMA not BIOS " |
| 179 | "enabled.\n", pci_name(dev)); |
| 180 | reg |= 0x00004000; /* enable UDMA/33 support */ |
| 181 | pci_write_config_dword(isa_dev, 0x64, reg); |
| 182 | pci_dev_put(isa_dev); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | /* setup CSB5/CSB6 : South Bridge and IDE option RAID */ |
| 187 | else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) || |
| 188 | (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) || |
| 189 | (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) { |
| 190 | |
| 191 | /* Third Channel Test */ |
| 192 | if (!(PCI_FUNC(dev->devfn) & 1)) { |
| 193 | struct pci_dev * findev = NULL; |
| 194 | u32 reg4c = 0; |
| 195 | findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS, |
| 196 | PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL); |
| 197 | if (findev) { |
| 198 | pci_read_config_dword(findev, 0x4C, ®4c); |
| 199 | reg4c &= ~0x000007FF; |
| 200 | reg4c |= 0x00000040; |
| 201 | reg4c |= 0x00000020; |
| 202 | pci_write_config_dword(findev, 0x4C, reg4c); |
| 203 | pci_dev_put(findev); |
| 204 | } |
| 205 | outb_p(0x06, 0x0c00); |
| 206 | dev->irq = inb_p(0x0c01); |
| 207 | } else { |
| 208 | struct pci_dev * findev = NULL; |
| 209 | u8 reg41 = 0; |
| 210 | |
| 211 | findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS, |
| 212 | PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL); |
| 213 | if (findev) { |
| 214 | pci_read_config_byte(findev, 0x41, ®41); |
| 215 | reg41 &= ~0x40; |
| 216 | pci_write_config_byte(findev, 0x41, reg41); |
| 217 | pci_dev_put(findev); |
| 218 | } |
| 219 | /* |
| 220 | * This is a device pin issue on CSB6. |
| 221 | * Since there will be a future raid mode, |
| 222 | * early versions of the chipset require the |
| 223 | * interrupt pin to be set, and it is a compatibility |
| 224 | * mode issue. |
| 225 | */ |
| 226 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
| 227 | dev->irq = 0; |
| 228 | } |
| 229 | // pci_read_config_dword(dev, 0x40, &pioreg) |
| 230 | // pci_write_config_dword(dev, 0x40, 0x99999999); |
| 231 | // pci_read_config_dword(dev, 0x44, &dmareg); |
| 232 | // pci_write_config_dword(dev, 0x44, 0xFFFFFFFF); |
| 233 | /* setup the UDMA Control register |
| 234 | * |
| 235 | * 1. clear bit 6 to enable DMA |
| 236 | * 2. enable DMA modes with bits 0-1 |
| 237 | * 00 : legacy |
| 238 | * 01 : udma2 |
| 239 | * 10 : udma2/udma4 |
| 240 | * 11 : udma2/udma4/udma5 |
| 241 | */ |
| 242 | pci_read_config_byte(dev, 0x5A, &btr); |
| 243 | btr &= ~0x40; |
| 244 | if (!(PCI_FUNC(dev->devfn) & 1)) |
| 245 | btr |= 0x2; |
| 246 | else |
| 247 | btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2; |
| 248 | pci_write_config_byte(dev, 0x5A, btr); |
| 249 | } |
| 250 | /* Setup HT1000 SouthBridge Controller - Single Channel Only */ |
| 251 | else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) { |
| 252 | pci_read_config_byte(dev, 0x5A, &btr); |
| 253 | btr &= ~0x40; |
| 254 | btr |= 0x3; |
| 255 | pci_write_config_byte(dev, 0x5A, btr); |
| 256 | } |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static u8 ata66_svwks_svwks(ide_hwif_t *hwif) |
| 262 | { |
| 263 | return ATA_CBL_PATA80; |
| 264 | } |
| 265 | |
| 266 | /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits |
| 267 | * of the subsystem device ID indicate presence of an 80-pin cable. |
| 268 | * Bit 15 clear = secondary IDE channel does not have 80-pin cable. |
| 269 | * Bit 15 set = secondary IDE channel has 80-pin cable. |
| 270 | * Bit 14 clear = primary IDE channel does not have 80-pin cable. |
| 271 | * Bit 14 set = primary IDE channel has 80-pin cable. |
| 272 | */ |
| 273 | static u8 ata66_svwks_dell(ide_hwif_t *hwif) |
| 274 | { |
| 275 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 276 | |
| 277 | if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL && |
| 278 | dev->vendor == PCI_VENDOR_ID_SERVERWORKS && |
| 279 | (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE || |
| 280 | dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE)) |
| 281 | return ((1 << (hwif->channel + 14)) & |
| 282 | dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40; |
| 283 | return ATA_CBL_PATA40; |
| 284 | } |
| 285 | |
| 286 | /* Sun Cobalt Alpine hardware avoids the 80-pin cable |
| 287 | * detect issue by attaching the drives directly to the board. |
| 288 | * This check follows the Dell precedent (how scary is that?!) |
| 289 | * |
| 290 | * WARNING: this only works on Alpine hardware! |
| 291 | */ |
| 292 | static u8 ata66_svwks_cobalt(ide_hwif_t *hwif) |
| 293 | { |
| 294 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 295 | |
| 296 | if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN && |
| 297 | dev->vendor == PCI_VENDOR_ID_SERVERWORKS && |
| 298 | dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) |
| 299 | return ((1 << (hwif->channel + 14)) & |
| 300 | dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40; |
| 301 | return ATA_CBL_PATA40; |
| 302 | } |
| 303 | |
| 304 | static u8 svwks_cable_detect(ide_hwif_t *hwif) |
| 305 | { |
| 306 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 307 | |
| 308 | /* Server Works */ |
| 309 | if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS) |
| 310 | return ata66_svwks_svwks (hwif); |
| 311 | |
| 312 | /* Dell PowerEdge */ |
| 313 | if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL) |
| 314 | return ata66_svwks_dell (hwif); |
| 315 | |
| 316 | /* Cobalt Alpine */ |
| 317 | if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN) |
| 318 | return ata66_svwks_cobalt (hwif); |
| 319 | |
| 320 | /* Per Specified Design by OEM, and ASIC Architect */ |
| 321 | if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) || |
| 322 | (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) |
| 323 | return ATA_CBL_PATA80; |
| 324 | |
| 325 | return ATA_CBL_PATA40; |
| 326 | } |
| 327 | |
| 328 | static const struct ide_port_ops osb4_port_ops = { |
| 329 | .set_pio_mode = svwks_set_pio_mode, |
| 330 | .set_dma_mode = svwks_set_dma_mode, |
| 331 | }; |
| 332 | |
| 333 | static const struct ide_port_ops svwks_port_ops = { |
| 334 | .set_pio_mode = svwks_set_pio_mode, |
| 335 | .set_dma_mode = svwks_set_dma_mode, |
| 336 | .udma_filter = svwks_udma_filter, |
| 337 | .cable_detect = svwks_cable_detect, |
| 338 | }; |
| 339 | |
| 340 | static const struct ide_port_info serverworks_chipsets[] __devinitdata = { |
| 341 | { /* 0: OSB4 */ |
| 342 | .name = DRV_NAME, |
| 343 | .init_chipset = init_chipset_svwks, |
| 344 | .port_ops = &osb4_port_ops, |
| 345 | .pio_mask = ATA_PIO4, |
| 346 | .mwdma_mask = ATA_MWDMA2, |
| 347 | .udma_mask = 0x00, /* UDMA is problematic on OSB4 */ |
| 348 | }, |
| 349 | { /* 1: CSB5 */ |
| 350 | .name = DRV_NAME, |
| 351 | .init_chipset = init_chipset_svwks, |
| 352 | .port_ops = &svwks_port_ops, |
| 353 | .pio_mask = ATA_PIO4, |
| 354 | .mwdma_mask = ATA_MWDMA2, |
| 355 | .udma_mask = ATA_UDMA5, |
| 356 | }, |
| 357 | { /* 2: CSB6 */ |
| 358 | .name = DRV_NAME, |
| 359 | .init_chipset = init_chipset_svwks, |
| 360 | .port_ops = &svwks_port_ops, |
| 361 | .pio_mask = ATA_PIO4, |
| 362 | .mwdma_mask = ATA_MWDMA2, |
| 363 | .udma_mask = ATA_UDMA5, |
| 364 | }, |
| 365 | { /* 3: CSB6-2 */ |
| 366 | .name = DRV_NAME, |
| 367 | .init_chipset = init_chipset_svwks, |
| 368 | .port_ops = &svwks_port_ops, |
| 369 | .host_flags = IDE_HFLAG_SINGLE, |
| 370 | .pio_mask = ATA_PIO4, |
| 371 | .mwdma_mask = ATA_MWDMA2, |
| 372 | .udma_mask = ATA_UDMA5, |
| 373 | }, |
| 374 | { /* 4: HT1000 */ |
| 375 | .name = DRV_NAME, |
| 376 | .init_chipset = init_chipset_svwks, |
| 377 | .port_ops = &svwks_port_ops, |
| 378 | .host_flags = IDE_HFLAG_SINGLE, |
| 379 | .pio_mask = ATA_PIO4, |
| 380 | .mwdma_mask = ATA_MWDMA2, |
| 381 | .udma_mask = ATA_UDMA5, |
| 382 | } |
| 383 | }; |
| 384 | |
| 385 | /** |
| 386 | * svwks_init_one - called when a OSB/CSB is found |
| 387 | * @dev: the svwks device |
| 388 | * @id: the matching pci id |
| 389 | * |
| 390 | * Called when the PCI registration layer (or the IDE initialization) |
| 391 | * finds a device matching our IDE device tables. |
| 392 | */ |
| 393 | |
| 394 | static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 395 | { |
| 396 | struct ide_port_info d; |
| 397 | u8 idx = id->driver_data; |
| 398 | |
| 399 | d = serverworks_chipsets[idx]; |
| 400 | |
| 401 | if (idx == 1) |
| 402 | d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX; |
| 403 | else if (idx == 2 || idx == 3) { |
| 404 | if ((PCI_FUNC(dev->devfn) & 1) == 0) { |
| 405 | if (pci_resource_start(dev, 0) != 0x01f1) |
| 406 | d.host_flags |= IDE_HFLAG_NON_BOOTABLE; |
| 407 | d.host_flags |= IDE_HFLAG_SINGLE; |
| 408 | } else |
| 409 | d.host_flags &= ~IDE_HFLAG_SINGLE; |
| 410 | } |
| 411 | |
| 412 | return ide_pci_init_one(dev, &d, NULL); |
| 413 | } |
| 414 | |
| 415 | static const struct pci_device_id svwks_pci_tbl[] = { |
| 416 | { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0 }, |
| 417 | { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 1 }, |
| 418 | { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2 }, |
| 419 | { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 3 }, |
| 420 | { PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4 }, |
| 421 | { 0, }, |
| 422 | }; |
| 423 | MODULE_DEVICE_TABLE(pci, svwks_pci_tbl); |
| 424 | |
| 425 | static struct pci_driver svwks_pci_driver = { |
| 426 | .name = "Serverworks_IDE", |
| 427 | .id_table = svwks_pci_tbl, |
| 428 | .probe = svwks_init_one, |
| 429 | .remove = ide_pci_remove, |
| 430 | .suspend = ide_pci_suspend, |
| 431 | .resume = ide_pci_resume, |
| 432 | }; |
| 433 | |
| 434 | static int __init svwks_ide_init(void) |
| 435 | { |
| 436 | return ide_pci_register_driver(&svwks_pci_driver); |
| 437 | } |
| 438 | |
| 439 | static void __exit svwks_ide_exit(void) |
| 440 | { |
| 441 | pci_unregister_driver(&svwks_pci_driver); |
| 442 | } |
| 443 | |
| 444 | module_init(svwks_ide_init); |
| 445 | module_exit(svwks_ide_exit); |
| 446 | |
| 447 | MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick, Bartlomiej Zolnierkiewicz"); |
| 448 | MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE"); |
| 449 | MODULE_LICENSE("GPL"); |