linux/drivers/ide/serverworks.c
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   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 */
  47static const char *svwks_bad_ata100[] = {
  48        "ST320011A",
  49        "ST340016A",
  50        "ST360021A",
  51        "ST380021A",
  52        NULL
  53};
  54
  55static 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
  65static 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
  95static 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
 109static 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
 131static 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
 161static 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, &reg);
 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, &reg4c);
 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, &reg41);
 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
 261static 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 */
 273static 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 */
 292static 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
 304static 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
 328static 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
 333static 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
 340static const struct ide_port_info serverworks_chipsets[] = {
 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 
 394static int 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
 415static 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};
 423MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
 424
 425static 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
 434static int __init svwks_ide_init(void)
 435{
 436        return ide_pci_register_driver(&svwks_pci_driver);
 437}
 438
 439static void __exit svwks_ide_exit(void)
 440{
 441        pci_unregister_driver(&svwks_pci_driver);
 442}
 443
 444module_init(svwks_ide_init);
 445module_exit(svwks_ide_exit);
 446
 447MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick, Bartlomiej Zolnierkiewicz");
 448MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
 449MODULE_LICENSE("GPL");
 450
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