drivers/ide/amd74xx.c

   1 /*
   2  * AMD 755/756/766/8111 and nVidia nForce/2/2s/3/3s/CK804/MCP04
   3  * IDE driver for Linux.
   4  *
   5  * Copyright (c) 2000-2002 Vojtech Pavlik
   6  * Copyright (c) 2007-2008 Bartlomiej Zolnierkiewicz
   7  *
   8  * Based on the work of:
   9  *      Andre Hedrick
  10  */
  11
  12 /*
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU General Public License version 2 as published by
  15  * the Free Software Foundation.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/pci.h>
  21 #include <linux/init.h>
  22 #include <linux/ide.h>
  23
  24 #define DRV_NAME "amd74xx"
  25
  26 enum {
  27         AMD_IDE_CONFIG          = 0x41,
  28         AMD_CABLE_DETECT        = 0x42,
  29         AMD_DRIVE_TIMING        = 0x48,
  30         AMD_8BIT_TIMING         = 0x4e,
  31         AMD_ADDRESS_SETUP       = 0x4c,
  32         AMD_UDMA_TIMING         = 0x50,
  33 };
  34
  35 static unsigned int amd_80w;
  36 static unsigned int amd_clock;
  37
  38 static char *amd_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
  39 static unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7 };
  40
  41 static inline u8 amd_offset(struct pci_dev *dev)
  42 {
  43         return (dev->vendor == PCI_VENDOR_ID_NVIDIA) ? 0x10 : 0;
  44 }
  45
  46 /*
  47  * amd_set_speed() writes timing values to the chipset registers
  48  */
  49
  50 static void amd_set_speed(struct pci_dev *dev, u8 dn, u8 udma_mask,
  51                           struct ide_timing *timing)
  52 {
  53         u8 t = 0, offset = amd_offset(dev);
  54
  55         pci_read_config_byte(dev, AMD_ADDRESS_SETUP + offset, &t);
  56         t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
  57         pci_write_config_byte(dev, AMD_ADDRESS_SETUP + offset, t);
  58
  59         pci_write_config_byte(dev, AMD_8BIT_TIMING + offset + (1 - (dn >> 1)),
  60                 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
  61
  62         pci_write_config_byte(dev, AMD_DRIVE_TIMING + offset + (3 - dn),
  63                 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
  64
  65         switch (udma_mask) {
  66         case ATA_UDMA2: t = timing->udma ? (0xc0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
  67         case ATA_UDMA4: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 2, 10)]) : 0x03; break;
  68         case ATA_UDMA5: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 10)]) : 0x03; break;
  69         case ATA_UDMA6: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 15)]) : 0x03; break;
  70         default: return;
  71         }
  72
  73         pci_write_config_byte(dev, AMD_UDMA_TIMING + offset + (3 - dn), t);
  74 }
  75
  76 /*
  77  * amd_set_drive() computes timing values and configures the chipset
  78  * to a desired transfer mode.  It also can be called by upper layers.
  79  */
  80
  81 static void amd_set_drive(ide_drive_t *drive, const u8 speed)
  82 {
  83         ide_hwif_t *hwif = drive->hwif;
  84         struct pci_dev *dev = to_pci_dev(hwif->dev);
  85         ide_drive_t *peer = ide_get_pair_dev(drive);
  86         struct ide_timing t, p;
  87         int T, UT;
  88         u8 udma_mask = hwif->ultra_mask;
  89
  90         T = 1000000000 / amd_clock;
  91         UT = (udma_mask == ATA_UDMA2) ? T : (T / 2);
  92
  93         ide_timing_compute(drive, speed, &t, T, UT);
  94
  95         if (peer) {
  96                 ide_timing_compute(peer, peer->current_speed, &p, T, UT);
  97                 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
  98         }
  99
 100         if (speed == XFER_UDMA_5 && amd_clock <= 33333) t.udma = 1;
 101         if (speed == XFER_UDMA_6 && amd_clock <= 33333) t.udma = 15;
 102
 103         amd_set_speed(dev, drive->dn, udma_mask, &t);
 104 }
 105
 106 /*
 107  * amd_set_pio_mode() is a callback from upper layers for PIO-only tuning.
 108  */
 109
 110 static void amd_set_pio_mode(ide_drive_t *drive, const u8 pio)
 111 {
 112         amd_set_drive(drive, XFER_PIO_0 + pio);
 113 }
 114
 115 static void amd7409_cable_detect(struct pci_dev *dev)
 116 {
 117         /* no host side cable detection */
 118         amd_80w = 0x03;
 119 }
 120
 121 static void amd7411_cable_detect(struct pci_dev *dev)
 122 {
 123         int i;
 124         u32 u = 0;
 125         u8 t = 0, offset = amd_offset(dev);
 126
 127         pci_read_config_byte(dev, AMD_CABLE_DETECT + offset, &t);
 128         pci_read_config_dword(dev, AMD_UDMA_TIMING + offset, &u);
 129         amd_80w = ((t & 0x3) ? 1 : 0) | ((t & 0xc) ? 2 : 0);
 130         for (i = 24; i >= 0; i -= 8)
 131                 if (((u >> i) & 4) && !(amd_80w & (1 << (1 - (i >> 4))))) {
 132                         printk(KERN_WARNING DRV_NAME " %s: BIOS didn't set "
 133                                 "cable bits correctly. Enabling workaround.\n",
 134                                 pci_name(dev));
 135                         amd_80w |= (1 << (1 - (i >> 4)));
 136                 }
 137 }
 138
 139 /*
 140  * The initialization callback.  Initialize drive independent registers.
 141  */
 142
 143 static int init_chipset_amd74xx(struct pci_dev *dev)
 144 {
 145         u8 t = 0, offset = amd_offset(dev);
 146
 147 /*
 148  * Check 80-wire cable presence.
 149  */
 150
 151         if (dev->vendor == PCI_VENDOR_ID_AMD &&
 152             dev->device == PCI_DEVICE_ID_AMD_COBRA_7401)
 153                 ; /* no UDMA > 2 */
 154         else if (dev->vendor == PCI_VENDOR_ID_AMD &&
 155                  dev->device == PCI_DEVICE_ID_AMD_VIPER_7409)
 156                 amd7409_cable_detect(dev);
 157         else
 158                 amd7411_cable_detect(dev);
 159
 160 /*
 161  * Take care of prefetch & postwrite.
 162  */
 163
 164         pci_read_config_byte(dev, AMD_IDE_CONFIG + offset, &t);
 165         /*
 166          * Check for broken FIFO support.
 167          */
 168         if (dev->vendor == PCI_VENDOR_ID_AMD &&
 169             dev->device == PCI_DEVICE_ID_AMD_VIPER_7411)
 170                 t &= 0x0f;
 171         else
 172                 t |= 0xf0;
 173         pci_write_config_byte(dev, AMD_IDE_CONFIG + offset, t);
 174
 175         return 0;
 176 }
 177
 178 static u8 amd_cable_detect(ide_hwif_t *hwif)
 179 {
 180         if ((amd_80w >> hwif->channel) & 1)
 181                 return ATA_CBL_PATA80;
 182         else
 183                 return ATA_CBL_PATA40;
 184 }
 185
 186 static const struct ide_port_ops amd_port_ops = {
 187         .set_pio_mode           = amd_set_pio_mode,
 188         .set_dma_mode           = amd_set_drive,
 189         .cable_detect           = amd_cable_detect,
 190 };
 191
 192 #define IDE_HFLAGS_AMD \
 193         (IDE_HFLAG_PIO_NO_BLACKLIST | \
 194          IDE_HFLAG_POST_SET_MODE | \
 195          IDE_HFLAG_IO_32BIT | \
 196          IDE_HFLAG_UNMASK_IRQS)
 197
 198 #define DECLARE_AMD_DEV(swdma, udma)                            \
 199         {                                                               \
 200                 .name           = DRV_NAME,                             \
 201                 .init_chipset   = init_chipset_amd74xx,                 \
 202                 .enablebits     = {{0x40,0x02,0x02}, {0x40,0x01,0x01}}, \
 203                 .port_ops       = &amd_port_ops,                        \
 204                 .host_flags     = IDE_HFLAGS_AMD,                       \
 205                 .pio_mask       = ATA_PIO5,                             \
 206                 .swdma_mask     = swdma,                                \
 207                 .mwdma_mask     = ATA_MWDMA2,                           \
 208                 .udma_mask      = udma,                                 \
 209         }
 210
 211 #define DECLARE_NV_DEV(udma)                                    \
 212         {                                                               \
 213                 .name           = DRV_NAME,                             \
 214                 .init_chipset   = init_chipset_amd74xx,                 \
 215                 .enablebits     = {{0x50,0x02,0x02}, {0x50,0x01,0x01}}, \
 216                 .port_ops       = &amd_port_ops,                        \
 217                 .host_flags     = IDE_HFLAGS_AMD,                       \
 218                 .pio_mask       = ATA_PIO5,                             \
 219                 .swdma_mask     = ATA_SWDMA2,                           \
 220                 .mwdma_mask     = ATA_MWDMA2,                           \
 221                 .udma_mask      = udma,                                 \
 222         }
 223
 224 static const struct ide_port_info amd74xx_chipsets[] __devinitdata = {
 225         /* 0: AMD7401 */        DECLARE_AMD_DEV(0x00, ATA_UDMA2),
 226         /* 1: AMD7409 */        DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA4),
 227         /* 2: AMD7411/7441 */   DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
 228         /* 3: AMD8111 */        DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA6),
 229
 230         /* 4: NFORCE */         DECLARE_NV_DEV(ATA_UDMA5),
 231         /* 5: >= NFORCE2 */     DECLARE_NV_DEV(ATA_UDMA6),
 232
 233         /* 6: AMD5536 */        DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
 234 };
 235
 236 static int __devinit amd74xx_probe(struct pci_dev *dev, const struct pci_device_id *id)
 237 {
 238         struct ide_port_info d;
 239         u8 idx = id->driver_data;
 240
 241         d = amd74xx_chipsets[idx];
 242
 243         /*
 244          * Check for bad SWDMA and incorrectly wired Serenade mainboards.
 245          */
 246         if (idx == 1) {
 247                 if (dev->revision <= 7)
 248                         d.swdma_mask = 0;
 249                 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
 250         } else if (idx == 3) {
 251                 if (dev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
 252                     dev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
 253                         d.udma_mask = ATA_UDMA5;
 254         }
 255
 256         /*
 257          * It seems that on some nVidia controllers using AltStatus
 258          * register can be unreliable so default to Status register
 259          * if the device is in Compatibility Mode.
 260          */
 261         if (dev->vendor == PCI_VENDOR_ID_NVIDIA &&
 262             ide_pci_is_in_compatibility_mode(dev))
 263                 d.host_flags |= IDE_HFLAG_BROKEN_ALTSTATUS;
 264
 265         printk(KERN_INFO "%s %s: UDMA%s controller\n",
 266                 d.name, pci_name(dev), amd_dma[fls(d.udma_mask) - 1]);
 267
 268         /*
 269         * Determine the system bus clock.
 270         */
 271         amd_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
 272
 273         switch (amd_clock) {
 274         case 33000: amd_clock = 33333; break;
 275         case 37000: amd_clock = 37500; break;
 276         case 41000: amd_clock = 41666; break;
 277         }
 278
 279         if (amd_clock < 20000 || amd_clock > 50000) {
 280                 printk(KERN_WARNING "%s: User given PCI clock speed impossible"
 281                                     " (%d), using 33 MHz instead.\n",
 282                                     d.name, amd_clock);
 283                 amd_clock = 33333;
 284         }
 285
 286         return ide_pci_init_one(dev, &d, NULL);
 287 }
 288
 289 static const struct pci_device_id amd74xx_pci_tbl[] = {
 290         { PCI_VDEVICE(AMD,      PCI_DEVICE_ID_AMD_COBRA_7401),           0 },
 291         { PCI_VDEVICE(AMD,      PCI_DEVICE_ID_AMD_VIPER_7409),           1 },
 292         { PCI_VDEVICE(AMD,      PCI_DEVICE_ID_AMD_VIPER_7411),           2 },
 293         { PCI_VDEVICE(AMD,      PCI_DEVICE_ID_AMD_OPUS_7441),            2 },
 294         { PCI_VDEVICE(AMD,      PCI_DEVICE_ID_AMD_8111_IDE),             3 },
 295         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_IDE),        4 },
 296         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE),       5 },
 297         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE),      5 },
 298 #ifdef CONFIG_BLK_DEV_IDE_SATA
 299         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA),     5 },
 300 #endif
 301         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE),       5 },
 302         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE),      5 },
 303 #ifdef CONFIG_BLK_DEV_IDE_SATA
 304         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA),     5 },
 305         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2),    5 },
 306 #endif
 307         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE),  5 },
 308         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE),  5 },
 309         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE),  5 },
 310         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE),  5 },
 311         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE),  5 },
 312         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE),  5 },
 313         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE),  5 },
 314         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE),  5 },
 315         { PCI_VDEVICE(NVIDIA,   PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE),  5 },
 316         { PCI_VDEVICE(AMD,      PCI_DEVICE_ID_AMD_CS5536_IDE),           6 },
 317         { 0, },
 318 };
 319 MODULE_DEVICE_TABLE(pci, amd74xx_pci_tbl);
 320
 321 static struct pci_driver amd74xx_pci_driver = {
 322         .name           = "AMD_IDE",
 323         .id_table       = amd74xx_pci_tbl,
 324         .probe          = amd74xx_probe,
 325         .remove         = ide_pci_remove,
 326         .suspend        = ide_pci_suspend,
 327         .resume         = ide_pci_resume,
 328 };
 329
 330 static int __init amd74xx_ide_init(void)
 331 {
 332         return ide_pci_register_driver(&amd74xx_pci_driver);
 333 }
 334
 335 static void __exit amd74xx_ide_exit(void)
 336 {
 337         pci_unregister_driver(&amd74xx_pci_driver);
 338 }
 339
 340 module_init(amd74xx_ide_init);
 341 module_exit(amd74xx_ide_exit);
 342
 343 MODULE_AUTHOR("Vojtech Pavlik");
 344 MODULE_DESCRIPTION("AMD PCI IDE driver");
 345 MODULE_LICENSE("GPL");