drivers/ide/pci/hpt366.c

   1 /*
   2  * linux/drivers/ide/pci/hpt366.c               Version 1.01    Dec 23, 2006
   3  *
   4  * Copyright (C) 1999-2003              Andre Hedrick <andre@linux-ide.org>
   5  * Portions Copyright (C) 2001          Sun Microsystems, Inc.
   6  * Portions Copyright (C) 2003          Red Hat Inc
   7  * Portions Copyright (C) 2005-2006     MontaVista Software, Inc.
   8  *
   9  * Thanks to HighPoint Technologies for their assistance, and hardware.
  10  * Special Thanks to Jon Burchmore in SanDiego for the deep pockets, his
  11  * donation of an ABit BP6 mainboard, processor, and memory acellerated
  12  * development and support.
  13  *
  14  *
  15  * HighPoint has its own drivers (open source except for the RAID part)
  16  * available from http://www.highpoint-tech.com/BIOS%20+%20Driver/.
  17  * This may be useful to anyone wanting to work on this driver, however  do not
  18  * trust  them too much since the code tends to become less and less meaningful
  19  * as the time passes... :-/
  20  *
  21  * Note that final HPT370 support was done by force extraction of GPL.
  22  *
  23  * - add function for getting/setting power status of drive
  24  * - the HPT370's state machine can get confused. reset it before each dma
  25  *   xfer to prevent that from happening.
  26  * - reset state engine whenever we get an error.
  27  * - check for busmaster state at end of dma.
  28  * - use new highpoint timings.
  29  * - detect bus speed using highpoint register.
  30  * - use pll if we don't have a clock table. added a 66MHz table that's
  31  *   just 2x the 33MHz table.
  32  * - removed turnaround. NOTE: we never want to switch between pll and
  33  *   pci clocks as the chip can glitch in those cases. the highpoint
  34  *   approved workaround slows everything down too much to be useful. in
  35  *   addition, we would have to serialize access to each chip.
  36  *      Adrian Sun <a.sun@sun.com>
  37  *
  38  * add drive timings for 66MHz PCI bus,
  39  * fix ATA Cable signal detection, fix incorrect /proc info
  40  * add /proc display for per-drive PIO/DMA/UDMA mode and
  41  * per-channel ATA-33/66 Cable detect.
  42  *      Duncan Laurie <void@sun.com>
  43  *
  44  * fixup /proc output for multiple controllers
  45  *      Tim Hockin <thockin@sun.com>
  46  *
  47  * On hpt366:
  48  * Reset the hpt366 on error, reset on dma
  49  * Fix disabling Fast Interrupt hpt366.
  50  *      Mike Waychison <crlf@sun.com>
  51  *
  52  * Added support for 372N clocking and clock switching. The 372N needs
  53  * different clocks on read/write. This requires overloading rw_disk and
  54  * other deeply crazy things. Thanks to <http://www.hoerstreich.de> for
  55  * keeping me sane.
  56  *              Alan Cox <alan@redhat.com>
  57  *
  58  * - fix the clock turnaround code: it was writing to the wrong ports when
  59  *   called for the secondary channel, caching the current clock mode per-
  60  *   channel caused the cached register value to get out of sync with the
  61  *   actual one, the channels weren't serialized, the turnaround shouldn't
  62  *   be done on 66 MHz PCI bus
  63  * - disable UltraATA/100 for HPT370 by default as the 33 MHz clock being used
  64  *   does not allow for this speed anyway
  65  * - avoid touching disabled channels (e.g. HPT371/N are single channel chips,
  66  *   their primary channel is kind of virtual, it isn't tied to any pins)
  67  * - fix/remove bad/unused timing tables and use one set of tables for the whole
  68  *   HPT37x chip family; save space by introducing the separate transfer mode
  69  *   table in which the mode lookup is done
  70  * - use f_CNT value saved by  the HighPoint BIOS as reading it directly gives
  71  *   the wrong PCI frequency since DPLL has already been calibrated by BIOS
  72  * - fix the hotswap code:  it caused RESET- to glitch when tristating the bus,
  73  *   and for HPT36x the obsolete HDIO_TRISTATE_HWIF handler was called instead
  74  * - pass to init_chipset() handlers a copy of the IDE PCI device structure as
  75  *   they tamper with its fields
  76  * - pass  to the init_setup handlers a copy of the ide_pci_device_t structure
  77  *   since they may tamper with its fields
  78  * - prefix the driver startup messages with the real chip name
  79  * - claim the extra 240 bytes of I/O space for all chips
  80  * - optimize the rate masking/filtering and the drive list lookup code
  81  * - use pci_get_slot() to get to the function 1 of HPT36x/374
  82  * - cache offset of the channel's misc. control registers (MCRs) being used
  83  *   throughout the driver
  84  * - only touch the relevant MCR when detecting the cable type on HPT374's
  85  *   function 1
  86  * - rename all the register related variables consistently
  87  * - move all the interrupt twiddling code from the speedproc handlers into
  88  *   init_hwif_hpt366(), also grouping all the DMA related code together there
  89  * - merge two HPT37x speedproc handlers, fix the PIO timing register mask and
  90  *   separate the UltraDMA and MWDMA masks there to avoid changing PIO timings
  91  *   when setting an UltraDMA mode
  92  * - fix hpt3xx_tune_drive() to set the PIO mode requested, not always select
  93  *   the best possible one
  94  * - clean up DMA timeout handling for HPT370
  95  * - switch to using the enumeration type to differ between the numerous chip
  96  *   variants, matching PCI device/revision ID with the chip type early, at the
  97  *   init_setup stage
  98  * - extend the hpt_info structure to hold the DPLL and PCI clock frequencies,
  99  *   stop duplicating it for each channel by storing the pointer in the pci_dev
 100  *   structure: first, at the init_setup stage, point it to a static "template"
 101  *   with only the chip type and its specific base DPLL frequency, the highest
 102  *   supported DMA mode, and the chip settings table pointer filled, then, at
 103  *   the init_chipset stage, allocate per-chip instance  and fill it with the
 104  *   rest of the necessary information
 105  * - get rid of the constant thresholds in the HPT37x PCI clock detection code,
 106  *   switch  to calculating  PCI clock frequency based on the chip's base DPLL
 107  *   frequency
 108  * - switch to using the  DPLL clock and enable UltraATA/133 mode by default on
 109  *   anything  newer than HPT370/A
 110  * - fold PCI clock detection and DPLL setup code into init_chipset_hpt366(),
 111  *   also fixing the interchanged 25/40 MHz PCI clock cases for HPT36x chips;
 112  *   unify HPT36x/37x timing setup code and the speedproc handlers by joining
 113  *   the register setting lists into the table indexed by the clock selected
 114  *      Sergei Shtylyov, <sshtylyov@ru.mvista.com> or <source@mvista.com>
 115  */
 116
 117 #include <linux/types.h>
 118 #include <linux/module.h>
 119 #include <linux/kernel.h>
 120 #include <linux/delay.h>
 121 #include <linux/timer.h>
 122 #include <linux/mm.h>
 123 #include <linux/ioport.h>
 124 #include <linux/blkdev.h>
 125 #include <linux/hdreg.h>
 126
 127 #include <linux/interrupt.h>
 128 #include <linux/pci.h>
 129 #include <linux/init.h>
 130 #include <linux/ide.h>
 131
 132 #include <asm/uaccess.h>
 133 #include <asm/io.h>
 134 #include <asm/irq.h>
 135
 136 /* various tuning parameters */
 137 #define HPT_RESET_STATE_ENGINE
 138 #undef  HPT_DELAY_INTERRUPT
 139 #define HPT_SERIALIZE_IO        0
 140
 141 static const char *quirk_drives[] = {
 142         "QUANTUM FIREBALLlct08 08",
 143         "QUANTUM FIREBALLP KA6.4",
 144         "QUANTUM FIREBALLP LM20.4",
 145         "QUANTUM FIREBALLP LM20.5",
 146         NULL
 147 };
 148
 149 static const char *bad_ata100_5[] = {
 150         "IBM-DTLA-307075",
 151         "IBM-DTLA-307060",
 152         "IBM-DTLA-307045",
 153         "IBM-DTLA-307030",
 154         "IBM-DTLA-307020",
 155         "IBM-DTLA-307015",
 156         "IBM-DTLA-305040",
 157         "IBM-DTLA-305030",
 158         "IBM-DTLA-305020",
 159         "IC35L010AVER07-0",
 160         "IC35L020AVER07-0",
 161         "IC35L030AVER07-0",
 162         "IC35L040AVER07-0",
 163         "IC35L060AVER07-0",
 164         "WDC AC310200R",
 165         NULL
 166 };
 167
 168 static const char *bad_ata66_4[] = {
 169         "IBM-DTLA-307075",
 170         "IBM-DTLA-307060",
 171         "IBM-DTLA-307045",
 172         "IBM-DTLA-307030",
 173         "IBM-DTLA-307020",
 174         "IBM-DTLA-307015",
 175         "IBM-DTLA-305040",
 176         "IBM-DTLA-305030",
 177         "IBM-DTLA-305020",
 178         "IC35L010AVER07-0",
 179         "IC35L020AVER07-0",
 180         "IC35L030AVER07-0",
 181         "IC35L040AVER07-0",
 182         "IC35L060AVER07-0",
 183         "WDC AC310200R",
 184         NULL
 185 };
 186
 187 static const char *bad_ata66_3[] = {
 188         "WDC AC310200R",
 189         NULL
 190 };
 191
 192 static const char *bad_ata33[] = {
 193         "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
 194         "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
 195         "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
 196         "Maxtor 90510D4",
 197         "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
 198         "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
 199         "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
 200         NULL
 201 };
 202
 203 static u8 xfer_speeds[] = {
 204         XFER_UDMA_6,
 205         XFER_UDMA_5,
 206         XFER_UDMA_4,
 207         XFER_UDMA_3,
 208         XFER_UDMA_2,
 209         XFER_UDMA_1,
 210         XFER_UDMA_0,
 211
 212         XFER_MW_DMA_2,
 213         XFER_MW_DMA_1,
 214         XFER_MW_DMA_0,
 215
 216         XFER_PIO_4,
 217         XFER_PIO_3,
 218         XFER_PIO_2,
 219         XFER_PIO_1,
 220         XFER_PIO_0
 221 };
 222
 223 /* Key for bus clock timings
 224  * 36x   37x
 225  * bits  bits
 226  * 0:3   0:3    data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA.
 227  *              cycles = value + 1
 228  * 4:7   4:8    data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
 229  *              cycles = value + 1
 230  * 8:11  9:12   cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
 231  *              register access.
 232  * 12:15 13:17  cmd_low_time. Active time of DIOW_/DIOR_ during task file
 233  *              register access.
 234  * 16:18 18:20  udma_cycle_time. Clock cycles for UDMA xfer.
 235  * -     21     CLK frequency: 0=ATA clock, 1=dual ATA clock.
 236  * 19:21 22:24  pre_high_time. Time to initialize the 1st cycle for PIO and
 237  *              MW DMA xfer.
 238  * 22:24 25:27  cmd_pre_high_time. Time to initialize the 1st PIO cycle for
 239  *              task file register access.
 240  * 28    28     UDMA enable.
 241  * 29    29     DMA  enable.
 242  * 30    30     PIO MST enable. If set, the chip is in bus master mode during
 243  *              PIO xfer.
 244  * 31    31     FIFO enable.
 245  */
 246
 247 static u32 forty_base_hpt36x[] = {
 248         /* XFER_UDMA_6 */       0x900fd943,
 249         /* XFER_UDMA_5 */       0x900fd943,
 250         /* XFER_UDMA_4 */       0x900fd943,
 251         /* XFER_UDMA_3 */       0x900ad943,
 252         /* XFER_UDMA_2 */       0x900bd943,
 253         /* XFER_UDMA_1 */       0x9008d943,
 254         /* XFER_UDMA_0 */       0x9008d943,
 255
 256         /* XFER_MW_DMA_2 */     0xa008d943,
 257         /* XFER_MW_DMA_1 */     0xa010d955,
 258         /* XFER_MW_DMA_0 */     0xa010d9fc,
 259
 260         /* XFER_PIO_4 */        0xc008d963,
 261         /* XFER_PIO_3 */        0xc010d974,
 262         /* XFER_PIO_2 */        0xc010d997,
 263         /* XFER_PIO_1 */        0xc010d9c7,
 264         /* XFER_PIO_0 */        0xc018d9d9
 265 };
 266
 267 static u32 thirty_three_base_hpt36x[] = {
 268         /* XFER_UDMA_6 */       0x90c9a731,
 269         /* XFER_UDMA_5 */       0x90c9a731,
 270         /* XFER_UDMA_4 */       0x90c9a731,
 271         /* XFER_UDMA_3 */       0x90cfa731,
 272         /* XFER_UDMA_2 */       0x90caa731,
 273         /* XFER_UDMA_1 */       0x90cba731,
 274         /* XFER_UDMA_0 */       0x90c8a731,
 275
 276         /* XFER_MW_DMA_2 */     0xa0c8a731,
 277         /* XFER_MW_DMA_1 */     0xa0c8a732,     /* 0xa0c8a733 */
 278         /* XFER_MW_DMA_0 */     0xa0c8a797,
 279
 280         /* XFER_PIO_4 */        0xc0c8a731,
 281         /* XFER_PIO_3 */        0xc0c8a742,
 282         /* XFER_PIO_2 */        0xc0d0a753,
 283         /* XFER_PIO_1 */        0xc0d0a7a3,     /* 0xc0d0a793 */
 284         /* XFER_PIO_0 */        0xc0d0a7aa      /* 0xc0d0a7a7 */
 285 };
 286
 287 static u32 twenty_five_base_hpt36x[] = {
 288         /* XFER_UDMA_6 */       0x90c98521,
 289         /* XFER_UDMA_5 */       0x90c98521,
 290         /* XFER_UDMA_4 */       0x90c98521,
 291         /* XFER_UDMA_3 */       0x90cf8521,
 292         /* XFER_UDMA_2 */       0x90cf8521,
 293         /* XFER_UDMA_1 */       0x90cb8521,
 294         /* XFER_UDMA_0 */       0x90cb8521,
 295
 296         /* XFER_MW_DMA_2 */     0xa0ca8521,
 297         /* XFER_MW_DMA_1 */     0xa0ca8532,
 298         /* XFER_MW_DMA_0 */     0xa0ca8575,
 299
 300         /* XFER_PIO_4 */        0xc0ca8521,
 301         /* XFER_PIO_3 */        0xc0ca8532,
 302         /* XFER_PIO_2 */        0xc0ca8542,
 303         /* XFER_PIO_1 */        0xc0d08572,
 304         /* XFER_PIO_0 */        0xc0d08585
 305 };
 306
 307 static u32 thirty_three_base_hpt37x[] = {
 308         /* XFER_UDMA_6 */       0x12446231,     /* 0x12646231 ?? */
 309         /* XFER_UDMA_5 */       0x12446231,
 310         /* XFER_UDMA_4 */       0x12446231,
 311         /* XFER_UDMA_3 */       0x126c6231,
 312         /* XFER_UDMA_2 */       0x12486231,
 313         /* XFER_UDMA_1 */       0x124c6233,
 314         /* XFER_UDMA_0 */       0x12506297,
 315
 316         /* XFER_MW_DMA_2 */     0x22406c31,
 317         /* XFER_MW_DMA_1 */     0x22406c33,
 318         /* XFER_MW_DMA_0 */     0x22406c97,
 319
 320         /* XFER_PIO_4 */        0x06414e31,
 321         /* XFER_PIO_3 */        0x06414e42,
 322         /* XFER_PIO_2 */        0x06414e53,
 323         /* XFER_PIO_1 */        0x06814e93,
 324         /* XFER_PIO_0 */        0x06814ea7
 325 };
 326
 327 static u32 fifty_base_hpt37x[] = {
 328         /* XFER_UDMA_6 */       0x12848242,
 329         /* XFER_UDMA_5 */       0x12848242,
 330         /* XFER_UDMA_4 */       0x12ac8242,
 331         /* XFER_UDMA_3 */       0x128c8242,
 332         /* XFER_UDMA_2 */       0x120c8242,
 333         /* XFER_UDMA_1 */       0x12148254,
 334         /* XFER_UDMA_0 */       0x121882ea,
 335
 336         /* XFER_MW_DMA_2 */     0x22808242,
 337         /* XFER_MW_DMA_1 */     0x22808254,
 338         /* XFER_MW_DMA_0 */     0x228082ea,
 339
 340         /* XFER_PIO_4 */        0x0a81f442,
 341         /* XFER_PIO_3 */        0x0a81f443,
 342         /* XFER_PIO_2 */        0x0a81f454,
 343         /* XFER_PIO_1 */        0x0ac1f465,
 344         /* XFER_PIO_0 */        0x0ac1f48a
 345 };
 346
 347 static u32 sixty_six_base_hpt37x[] = {
 348         /* XFER_UDMA_6 */       0x1c869c62,
 349         /* XFER_UDMA_5 */       0x1cae9c62,     /* 0x1c8a9c62 */
 350         /* XFER_UDMA_4 */       0x1c8a9c62,
 351         /* XFER_UDMA_3 */       0x1c8e9c62,
 352         /* XFER_UDMA_2 */       0x1c929c62,
 353         /* XFER_UDMA_1 */       0x1c9a9c62,
 354         /* XFER_UDMA_0 */       0x1c829c62,
 355
 356         /* XFER_MW_DMA_2 */     0x2c829c62,
 357         /* XFER_MW_DMA_1 */     0x2c829c66,
 358         /* XFER_MW_DMA_0 */     0x2c829d2e,
 359
 360         /* XFER_PIO_4 */        0x0c829c62,
 361         /* XFER_PIO_3 */        0x0c829c84,
 362         /* XFER_PIO_2 */        0x0c829ca6,
 363         /* XFER_PIO_1 */        0x0d029d26,
 364         /* XFER_PIO_0 */        0x0d029d5e
 365 };
 366
 367 #define HPT366_DEBUG_DRIVE_INFO         0
 368 #define HPT374_ALLOW_ATA133_6           1
 369 #define HPT371_ALLOW_ATA133_6           1
 370 #define HPT302_ALLOW_ATA133_6           1
 371 #define HPT372_ALLOW_ATA133_6           1
 372 #define HPT370_ALLOW_ATA100_5           0
 373 #define HPT366_ALLOW_ATA66_4            1
 374 #define HPT366_ALLOW_ATA66_3            1
 375 #define HPT366_MAX_DEVS                 8
 376
 377 /* Supported ATA clock frequencies */
 378 enum ata_clock {
 379         ATA_CLOCK_25MHZ,
 380         ATA_CLOCK_33MHZ,
 381         ATA_CLOCK_40MHZ,
 382         ATA_CLOCK_50MHZ,
 383         ATA_CLOCK_66MHZ,
 384         NUM_ATA_CLOCKS
 385 };
 386
 387 /*
 388  *      Hold all the HighPoint chip information in one place.
 389  */
 390
 391 struct hpt_info {
 392         u8 chip_type;           /* Chip type */
 393         u8 max_mode;            /* Speeds allowed */
 394         u8 dpll_clk;            /* DPLL clock in MHz */
 395         u8 pci_clk;             /* PCI  clock in MHz */
 396         u32 **settings;         /* Chipset settings table */
 397 };
 398
 399 /* Supported HighPoint chips */
 400 enum {
 401         HPT36x,
 402         HPT370,
 403         HPT370A,
 404         HPT374,
 405         HPT372,
 406         HPT372A,
 407         HPT302,
 408         HPT371,
 409         HPT372N,
 410         HPT302N,
 411         HPT371N
 412 };
 413
 414 static u32 *hpt36x_settings[NUM_ATA_CLOCKS] = {
 415         twenty_five_base_hpt36x,
 416         thirty_three_base_hpt36x,
 417         forty_base_hpt36x,
 418         NULL,
 419         NULL
 420 };
 421
 422 static u32 *hpt37x_settings[NUM_ATA_CLOCKS] = {
 423         NULL,
 424         thirty_three_base_hpt37x,
 425         NULL,
 426         fifty_base_hpt37x,
 427         sixty_six_base_hpt37x
 428 };
 429
 430 static struct hpt_info hpt36x __devinitdata = {
 431         .chip_type      = HPT36x,
 432         .max_mode       = (HPT366_ALLOW_ATA66_4 || HPT366_ALLOW_ATA66_3) ? 2 : 1,
 433         .dpll_clk       = 0,    /* no DPLL */
 434         .settings       = hpt36x_settings
 435 };
 436
 437 static struct hpt_info hpt370 __devinitdata = {
 438         .chip_type      = HPT370,
 439         .max_mode       = HPT370_ALLOW_ATA100_5 ? 3 : 2,
 440         .dpll_clk       = 48,
 441         .settings       = hpt37x_settings
 442 };
 443
 444 static struct hpt_info hpt370a __devinitdata = {
 445         .chip_type      = HPT370A,
 446         .max_mode       = HPT370_ALLOW_ATA100_5 ? 3 : 2,
 447         .dpll_clk       = 48,
 448         .settings       = hpt37x_settings
 449 };
 450
 451 static struct hpt_info hpt374 __devinitdata = {
 452         .chip_type      = HPT374,
 453         .max_mode       = HPT374_ALLOW_ATA133_6 ? 4 : 3,
 454         .dpll_clk       = 48,
 455         .settings       = hpt37x_settings
 456 };
 457
 458 static struct hpt_info hpt372 __devinitdata = {
 459         .chip_type      = HPT372,
 460         .max_mode       = HPT372_ALLOW_ATA133_6 ? 4 : 3,
 461         .dpll_clk       = 55,
 462         .settings       = hpt37x_settings
 463 };
 464
 465 static struct hpt_info hpt372a __devinitdata = {
 466         .chip_type      = HPT372A,
 467         .max_mode       = HPT372_ALLOW_ATA133_6 ? 4 : 3,
 468         .dpll_clk       = 66,
 469         .settings       = hpt37x_settings
 470 };
 471
 472 static struct hpt_info hpt302 __devinitdata = {
 473         .chip_type      = HPT302,
 474         .max_mode       = HPT302_ALLOW_ATA133_6 ? 4 : 3,
 475         .dpll_clk       = 66,
 476         .settings       = hpt37x_settings
 477 };
 478
 479 static struct hpt_info hpt371 __devinitdata = {
 480         .chip_type      = HPT371,
 481         .max_mode       = HPT371_ALLOW_ATA133_6 ? 4 : 3,
 482         .dpll_clk       = 66,
 483         .settings       = hpt37x_settings
 484 };
 485
 486 static struct hpt_info hpt372n __devinitdata = {
 487         .chip_type      = HPT372N,
 488         .max_mode       = HPT372_ALLOW_ATA133_6 ? 4 : 3,
 489         .dpll_clk       = 77,
 490         .settings       = hpt37x_settings
 491 };
 492
 493 static struct hpt_info hpt302n __devinitdata = {
 494         .chip_type      = HPT302N,
 495         .max_mode       = HPT302_ALLOW_ATA133_6 ? 4 : 3,
 496         .dpll_clk       = 77,
 497 };
 498
 499 static struct hpt_info hpt371n __devinitdata = {
 500         .chip_type      = HPT371N,
 501         .max_mode       = HPT371_ALLOW_ATA133_6 ? 4 : 3,
 502         .dpll_clk       = 77,
 503         .settings       = hpt37x_settings
 504 };
 505
 506 static int check_in_drive_list(ide_drive_t *drive, const char **list)
 507 {
 508         struct hd_driveid *id = drive->id;
 509
 510         while (*list)
 511                 if (!strcmp(*list++,id->model))
 512                         return 1;
 513         return 0;
 514 }
 515
 516 static u8 hpt3xx_ratemask(ide_drive_t *drive)
 517 {
 518         struct hpt_info *info   = pci_get_drvdata(HWIF(drive)->pci_dev);
 519         u8 mode                 = info->max_mode;
 520
 521         if (!eighty_ninty_three(drive) && mode)
 522                 mode = min(mode, (u8)1);
 523         return mode;
 524 }
 525
 526 /*
 527  *      Note for the future; the SATA hpt37x we must set
 528  *      either PIO or UDMA modes 0,4,5
 529  */
 530
 531 static u8 hpt3xx_ratefilter(ide_drive_t *drive, u8 speed)
 532 {
 533         struct hpt_info *info   = pci_get_drvdata(HWIF(drive)->pci_dev);
 534         u8 chip_type            = info->chip_type;
 535         u8 mode                 = hpt3xx_ratemask(drive);
 536
 537         if (drive->media != ide_disk)
 538                 return min(speed, (u8)XFER_PIO_4);
 539
 540         switch (mode) {
 541                 case 0x04:
 542                         speed = min_t(u8, speed, XFER_UDMA_6);
 543                         break;
 544                 case 0x03:
 545                         speed = min_t(u8, speed, XFER_UDMA_5);
 546                         if (chip_type >= HPT374)
 547                                 break;
 548                         if (!check_in_drive_list(drive, bad_ata100_5))
 549                                 goto check_bad_ata33;
 550                         /* fall thru */
 551                 case 0x02:
 552                         speed = min_t(u8, speed, XFER_UDMA_4);
 553
 554                         /*
 555                          * CHECK ME, Does this need to be changed to HPT374 ??
 556                          */
 557                         if (chip_type >= HPT370)
 558                                 goto check_bad_ata33;
 559                         if (HPT366_ALLOW_ATA66_4 &&
 560                             !check_in_drive_list(drive, bad_ata66_4))
 561                                 goto check_bad_ata33;
 562
 563                         speed = min_t(u8, speed, XFER_UDMA_3);
 564                         if (HPT366_ALLOW_ATA66_3 &&
 565                             !check_in_drive_list(drive, bad_ata66_3))
 566                                 goto check_bad_ata33;
 567                         /* fall thru */
 568                 case 0x01:
 569                         speed = min_t(u8, speed, XFER_UDMA_2);
 570
 571                 check_bad_ata33:
 572                         if (chip_type >= HPT370A)
 573                                 break;
 574                         if (!check_in_drive_list(drive, bad_ata33))
 575                                 break;
 576                         /* fall thru */
 577                 case 0x00:
 578                 default:
 579                         speed = min_t(u8, speed, XFER_MW_DMA_2);
 580                         break;
 581         }
 582         return speed;
 583 }
 584
 585 static u32 get_speed_setting(u8 speed, struct hpt_info *info)
 586 {
 587         int i;
 588
 589         /*
 590          * Lookup the transfer mode table to get the index into
 591          * the timing table.
 592          *
 593          * NOTE: For XFER_PIO_SLOW, PIO mode 0 timings will be used.
 594          */
 595         for (i = 0; i < ARRAY_SIZE(xfer_speeds) - 1; i++)
 596                 if (xfer_speeds[i] == speed)
 597                         break;
 598         /*
 599          * NOTE: info->settings only points to the pointer
 600          * to the list of the actual register values
 601          */
 602         return (*info->settings)[i];
 603 }
 604
 605 static int hpt36x_tune_chipset(ide_drive_t *drive, u8 xferspeed)
 606 {
 607         ide_hwif_t *hwif        = HWIF(drive);
 608         struct pci_dev  *dev    = hwif->pci_dev;
 609         struct hpt_info *info   = pci_get_drvdata(dev);
 610         u8  speed               = hpt3xx_ratefilter(drive, xferspeed);
 611         u8  itr_addr            = drive->dn ? 0x44 : 0x40;
 612         u32 itr_mask            = speed < XFER_MW_DMA_0 ? 0x30070000 :
 613                                  (speed < XFER_UDMA_0   ? 0xc0070000 : 0xc03800ff);
 614         u32 new_itr             = get_speed_setting(speed, info);
 615         u32 old_itr             = 0;
 616
 617         /*
 618          * Disable on-chip PIO FIFO/buffer (and PIO MST mode as well)
 619          * to avoid problems handling I/O errors later
 620          */
 621         pci_read_config_dword(dev, itr_addr, &old_itr);
 622         new_itr  = (new_itr & ~itr_mask) | (old_itr & itr_mask);
 623         new_itr &= ~0xc0000000;
 624
 625         pci_write_config_dword(dev, itr_addr, new_itr);
 626
 627         return ide_config_drive_speed(drive, speed);
 628 }
 629
 630 static int hpt37x_tune_chipset(ide_drive_t *drive, u8 xferspeed)
 631 {
 632         ide_hwif_t *hwif        = HWIF(drive);
 633         struct pci_dev  *dev    = hwif->pci_dev;
 634         struct hpt_info *info   = pci_get_drvdata(dev);
 635         u8  speed               = hpt3xx_ratefilter(drive, xferspeed);
 636         u8  itr_addr            = 0x40 + (drive->dn * 4);
 637         u32 itr_mask            = speed < XFER_MW_DMA_0 ? 0x303c0000 :
 638                                  (speed < XFER_UDMA_0   ? 0xc03c0000 : 0xc1c001ff);
 639         u32 new_itr             = get_speed_setting(speed, info);
 640         u32 old_itr             = 0;
 641
 642         pci_read_config_dword(dev, itr_addr, &old_itr);
 643         new_itr = (new_itr & ~itr_mask) | (old_itr & itr_mask);
 644
 645         if (speed < XFER_MW_DMA_0)
 646                 new_itr &= ~0x80000000; /* Disable on-chip PIO FIFO/buffer */
 647         pci_write_config_dword(dev, itr_addr, new_itr);
 648
 649         return ide_config_drive_speed(drive, speed);
 650 }
 651
 652 static int hpt3xx_tune_chipset(ide_drive_t *drive, u8 speed)
 653 {
 654         ide_hwif_t *hwif        = HWIF(drive);
 655         struct hpt_info *info   = pci_get_drvdata(hwif->pci_dev);
 656
 657         if (info->chip_type >= HPT370)
 658                 return hpt37x_tune_chipset(drive, speed);
 659         else    /* hpt368: hpt_minimum_revision(dev, 2) */
 660                 return hpt36x_tune_chipset(drive, speed);
 661 }
 662
 663 static void hpt3xx_tune_drive(ide_drive_t *drive, u8 pio)
 664 {
 665         pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
 666         (void) hpt3xx_tune_chipset (drive, XFER_PIO_0 + pio);
 667 }
 668
 669 /*
 670  * This allows the configuration of ide_pci chipset registers
 671  * for cards that learn about the drive's UDMA, DMA, PIO capabilities
 672  * after the drive is reported by the OS.  Initially designed for
 673  * HPT366 UDMA chipset by HighPoint|Triones Technologies, Inc.
 674  *
 675  */
 676 static int config_chipset_for_dma(ide_drive_t *drive)
 677 {
 678         u8 speed = ide_dma_speed(drive, hpt3xx_ratemask(drive));
 679
 680         if (!speed)
 681                 return 0;
 682
 683         (void) hpt3xx_tune_chipset(drive, speed);
 684         return ide_dma_enable(drive);
 685 }
 686
 687 static int hpt3xx_quirkproc(ide_drive_t *drive)
 688 {
 689         struct hd_driveid *id   = drive->id;
 690         const  char **list      = quirk_drives;
 691
 692         while (*list)
 693                 if (strstr(id->model, *list++))
 694                         return 1;
 695         return 0;
 696 }
 697
 698 static void hpt3xx_intrproc(ide_drive_t *drive)
 699 {
 700         ide_hwif_t *hwif = HWIF(drive);
 701
 702         if (drive->quirk_list)
 703                 return;
 704         /* drives in the quirk_list may not like intr setups/cleanups */
 705         hwif->OUTB(drive->ctl | 2, IDE_CONTROL_REG);
 706 }
 707
 708 static void hpt3xx_maskproc(ide_drive_t *drive, int mask)
 709 {
 710         ide_hwif_t *hwif        = HWIF(drive);
 711         struct pci_dev  *dev    = hwif->pci_dev;
 712         struct hpt_info *info   = pci_get_drvdata(dev);
 713
 714         if (drive->quirk_list) {
 715                 if (info->chip_type >= HPT370) {
 716                         u8 scr1 = 0;
 717
 718                         pci_read_config_byte(dev, 0x5a, &scr1);
 719                         if (((scr1 & 0x10) >> 4) != mask) {
 720                                 if (mask)
 721                                         scr1 |=  0x10;
 722                                 else
 723                                         scr1 &= ~0x10;
 724                                 pci_write_config_byte(dev, 0x5a, scr1);
 725                         }
 726                 } else {
 727                         if (mask)
 728                                 disable_irq(hwif->irq);
 729                         else
 730                                 enable_irq (hwif->irq);
 731                 }
 732         } else
 733                 hwif->OUTB(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
 734                            IDE_CONTROL_REG);
 735 }
 736
 737 static int hpt366_config_drive_xfer_rate(ide_drive_t *drive)
 738 {
 739         ide_hwif_t *hwif        = HWIF(drive);
 740         struct hd_driveid *id   = drive->id;
 741
 742         drive->init_speed = 0;
 743
 744         if ((id->capability & 1) && drive->autodma) {
 745                 if (ide_use_dma(drive) && config_chipset_for_dma(drive))
 746                         return hwif->ide_dma_on(drive);
 747
 748                 goto fast_ata_pio;
 749
 750         } else if ((id->capability & 8) || (id->field_valid & 2)) {
 751 fast_ata_pio:
 752                 hpt3xx_tune_drive(drive, 255);
 753                 return hwif->ide_dma_off_quietly(drive);
 754         }
 755         /* IORDY not supported */
 756         return 0;
 757 }
 758
 759 /*
 760  * This is specific to the HPT366 UDMA chipset
 761  * by HighPoint|Triones Technologies, Inc.
 762  */
 763 static int hpt366_ide_dma_lostirq(ide_drive_t *drive)
 764 {
 765         struct pci_dev *dev = HWIF(drive)->pci_dev;
 766         u8 mcr1 = 0, mcr3 = 0, scr1 = 0;
 767
 768         pci_read_config_byte(dev, 0x50, &mcr1);
 769         pci_read_config_byte(dev, 0x52, &mcr3);
 770         pci_read_config_byte(dev, 0x5a, &scr1);
 771         printk("%s: (%s)  mcr1=0x%02x, mcr3=0x%02x, scr1=0x%02x\n",
 772                 drive->name, __FUNCTION__, mcr1, mcr3, scr1);
 773         if (scr1 & 0x10)
 774                 pci_write_config_byte(dev, 0x5a, scr1 & ~0x10);
 775         return __ide_dma_lostirq(drive);
 776 }
 777
 778 static void hpt370_clear_engine(ide_drive_t *drive)
 779 {
 780         ide_hwif_t *hwif = HWIF(drive);
 781
 782         pci_write_config_byte(hwif->pci_dev, hwif->select_data, 0x37);
 783         udelay(10);
 784 }
 785
 786 static void hpt370_irq_timeout(ide_drive_t *drive)
 787 {
 788         ide_hwif_t *hwif        = HWIF(drive);
 789         u16 bfifo               = 0;
 790         u8  dma_cmd;
 791
 792         pci_read_config_word(hwif->pci_dev, hwif->select_data + 2, &bfifo);
 793         printk(KERN_DEBUG "%s: %d bytes in FIFO\n", drive->name, bfifo & 0x1ff);
 794
 795         /* get DMA command mode */
 796         dma_cmd = hwif->INB(hwif->dma_command);
 797         /* stop DMA */
 798         hwif->OUTB(dma_cmd & ~0x1, hwif->dma_command);
 799         hpt370_clear_engine(drive);
 800 }
 801
 802 static void hpt370_ide_dma_start(ide_drive_t *drive)
 803 {
 804 #ifdef HPT_RESET_STATE_ENGINE
 805         hpt370_clear_engine(drive);
 806 #endif
 807         ide_dma_start(drive);
 808 }
 809
 810 static int hpt370_ide_dma_end(ide_drive_t *drive)
 811 {
 812         ide_hwif_t *hwif        = HWIF(drive);
 813         u8  dma_stat            = hwif->INB(hwif->dma_status);
 814
 815         if (dma_stat & 0x01) {
 816                 /* wait a little */
 817                 udelay(20);
 818                 dma_stat = hwif->INB(hwif->dma_status);
 819                 if (dma_stat & 0x01)
 820                         hpt370_irq_timeout(drive);
 821         }
 822         return __ide_dma_end(drive);
 823 }
 824
 825 static int hpt370_ide_dma_timeout(ide_drive_t *drive)
 826 {
 827         hpt370_irq_timeout(drive);
 828         return __ide_dma_timeout(drive);
 829 }
 830
 831 /* returns 1 if DMA IRQ issued, 0 otherwise */
 832 static int hpt374_ide_dma_test_irq(ide_drive_t *drive)
 833 {
 834         ide_hwif_t *hwif        = HWIF(drive);
 835         u16 bfifo               = 0;
 836         u8  dma_stat;
 837
 838         pci_read_config_word(hwif->pci_dev, hwif->select_data + 2, &bfifo);
 839         if (bfifo & 0x1FF) {
 840 //              printk("%s: %d bytes in FIFO\n", drive->name, bfifo);
 841                 return 0;
 842         }
 843
 844         dma_stat = hwif->INB(hwif->dma_status);
 845         /* return 1 if INTR asserted */
 846         if (dma_stat & 4)
 847                 return 1;
 848
 849         if (!drive->waiting_for_dma)
 850                 printk(KERN_WARNING "%s: (%s) called while not waiting\n",
 851                                 drive->name, __FUNCTION__);
 852         return 0;
 853 }
 854
 855 static int hpt374_ide_dma_end(ide_drive_t *drive)
 856 {
 857         ide_hwif_t *hwif        = HWIF(drive);
 858         struct pci_dev  *dev    = hwif->pci_dev;
 859         u8 mcr  = 0, mcr_addr   = hwif->select_data;
 860         u8 bwsr = 0, mask       = hwif->channel ? 0x02 : 0x01;
 861
 862         pci_read_config_byte(dev, 0x6a, &bwsr);
 863         pci_read_config_byte(dev, mcr_addr, &mcr);
 864         if (bwsr & mask)
 865                 pci_write_config_byte(dev, mcr_addr, mcr | 0x30);
 866         return __ide_dma_end(drive);
 867 }
 868
 869 /**
 870  *      hpt3xxn_set_clock       -       perform clock switching dance
 871  *      @hwif: hwif to switch
 872  *      @mode: clocking mode (0x21 for write, 0x23 otherwise)
 873  *
 874  *      Switch the DPLL clock on the HPT3xxN devices. This is a right mess.
 875  */
 876
 877 static void hpt3xxn_set_clock(ide_hwif_t *hwif, u8 mode)
 878 {
 879         u8 scr2 = hwif->INB(hwif->dma_master + 0x7b);
 880
 881         if ((scr2 & 0x7f) == mode)
 882                 return;
 883
 884         /* Tristate the bus */
 885         hwif->OUTB(0x80, hwif->dma_master + 0x73);
 886         hwif->OUTB(0x80, hwif->dma_master + 0x77);
 887
 888         /* Switch clock and reset channels */
 889         hwif->OUTB(mode, hwif->dma_master + 0x7b);
 890         hwif->OUTB(0xc0, hwif->dma_master + 0x79);
 891
 892         /*
 893          * Reset the state machines.
 894          * NOTE: avoid accidentally enabling the disabled channels.
 895          */
 896         hwif->OUTB(hwif->INB(hwif->dma_master + 0x70) | 0x32,
 897                    hwif->dma_master + 0x70);
 898         hwif->OUTB(hwif->INB(hwif->dma_master + 0x74) | 0x32,
 899                    hwif->dma_master + 0x74);
 900
 901         /* Complete reset */
 902         hwif->OUTB(0x00, hwif->dma_master + 0x79);
 903
 904         /* Reconnect channels to bus */
 905         hwif->OUTB(0x00, hwif->dma_master + 0x73);
 906         hwif->OUTB(0x00, hwif->dma_master + 0x77);
 907 }
 908
 909 /**
 910  *      hpt3xxn_rw_disk         -       prepare for I/O
 911  *      @drive: drive for command
 912  *      @rq: block request structure
 913  *
 914  *      This is called when a disk I/O is issued to HPT3xxN.
 915  *      We need it because of the clock switching.
 916  */
 917
 918 static void hpt3xxn_rw_disk(ide_drive_t *drive, struct request *rq)
 919 {
 920         hpt3xxn_set_clock(HWIF(drive), rq_data_dir(rq) ? 0x23 : 0x21);
 921 }
 922
 923 /*
 924  * Set/get power state for a drive.
 925  * NOTE: affects both drives on each channel.
 926  *
 927  * When we turn the power back on, we need to re-initialize things.
 928  */
 929 #define TRISTATE_BIT  0x8000
 930
 931 static int hpt3xx_busproc(ide_drive_t *drive, int state)
 932 {
 933         ide_hwif_t *hwif        = HWIF(drive);
 934         struct pci_dev *dev     = hwif->pci_dev;
 935         u8  mcr_addr            = hwif->select_data + 2;
 936         u8  resetmask           = hwif->channel ? 0x80 : 0x40;
 937         u8  bsr2                = 0;
 938         u16 mcr                 = 0;
 939
 940         hwif->bus_state = state;
 941
 942         /* Grab the status. */
 943         pci_read_config_word(dev, mcr_addr, &mcr);
 944         pci_read_config_byte(dev, 0x59, &bsr2);
 945
 946         /*
 947          * Set the state. We don't set it if we don't need to do so.
 948          * Make sure that the drive knows that it has failed if it's off.
 949          */
 950         switch (state) {
 951         case BUSSTATE_ON:
 952                 if (!(bsr2 & resetmask))
 953                         return 0;
 954                 hwif->drives[0].failures = hwif->drives[1].failures = 0;
 955
 956                 pci_write_config_byte(dev, 0x59, bsr2 & ~resetmask);
 957                 pci_write_config_word(dev, mcr_addr, mcr & ~TRISTATE_BIT);
 958                 return 0;
 959         case BUSSTATE_OFF:
 960                 if ((bsr2 & resetmask) && !(mcr & TRISTATE_BIT))
 961                         return 0;
 962                 mcr &= ~TRISTATE_BIT;
 963                 break;
 964         case BUSSTATE_TRISTATE:
 965                 if ((bsr2 & resetmask) &&  (mcr & TRISTATE_BIT))
 966                         return 0;
 967                 mcr |= TRISTATE_BIT;
 968                 break;
 969         default:
 970                 return -EINVAL;
 971         }
 972
 973         hwif->drives[0].failures = hwif->drives[0].max_failures + 1;
 974         hwif->drives[1].failures = hwif->drives[1].max_failures + 1;
 975
 976         pci_write_config_word(dev, mcr_addr, mcr);
 977         pci_write_config_byte(dev, 0x59, bsr2 | resetmask);
 978         return 0;
 979 }
 980
 981 /**
 982  *      hpt37x_calibrate_dpll   -       calibrate the DPLL
 983  *      @dev: PCI device
 984  *
 985  *      Perform a calibration cycle on the DPLL.
 986  *      Returns 1 if this succeeds
 987  */
 988 static int __devinit hpt37x_calibrate_dpll(struct pci_dev *dev, u16 f_low, u16 f_high)
 989 {
 990         u32 dpll = (f_high << 16) | f_low | 0x100;
 991         u8  scr2;
 992         int i;
 993
 994         pci_write_config_dword(dev, 0x5c, dpll);
 995
 996         /* Wait for oscillator ready */
 997         for(i = 0; i < 0x5000; ++i) {
 998                 udelay(50);
 999                 pci_read_config_byte(dev, 0x5b, &scr2);
1000                 if (scr2 & 0x80)
1001                         break;
1002         }
1003         /* See if it stays ready (we'll just bail out if it's not yet) */
1004         for(i = 0; i < 0x1000; ++i) {
1005                 pci_read_config_byte(dev, 0x5b, &scr2);
1006                 /* DPLL destabilized? */
1007                 if(!(scr2 & 0x80))
1008                         return 0;
1009         }
1010         /* Turn off tuning, we have the DPLL set */
1011         pci_read_config_dword (dev, 0x5c, &dpll);
1012         pci_write_config_dword(dev, 0x5c, (dpll & ~0x100));
1013         return 1;
1014 }
1015
1016 static unsigned int __devinit init_chipset_hpt366(struct pci_dev *dev, const char *name)
1017 {
1018         struct hpt_info *info   = kmalloc(sizeof(struct hpt_info), GFP_KERNEL);
1019         unsigned long io_base   = pci_resource_start(dev, 4);
1020         u8 pci_clk,  dpll_clk   = 0;    /* PCI and DPLL clock in MHz */
1021         enum ata_clock  clock;
1022
1023         if (info == NULL) {
1024                 printk(KERN_ERR "%s: out of memory!\n", name);
1025                 return -ENOMEM;
1026         }
1027
1028         /*
1029          * Copy everything from a static "template" structure
1030          * to just allocated per-chip hpt_info structure.
1031          */
1032         *info = *(struct hpt_info *)pci_get_drvdata(dev);
1033
1034         /*
1035          * FIXME: Not portable. Also, why do we enable the ROM in the first place?
1036          * We don't seem to be using it.
1037          */
1038         if (dev->resource[PCI_ROM_RESOURCE].start)
1039                 pci_write_config_dword(dev, PCI_ROM_ADDRESS,
1040                         dev->resource[PCI_ROM_RESOURCE].start | PCI_ROM_ADDRESS_ENABLE);
1041
1042         pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
1043         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
1044         pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
1045         pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
1046
1047         /*
1048          * First, try to estimate the PCI clock frequency...
1049          */
1050         if (info->chip_type >= HPT370) {
1051                 u8  scr1  = 0;
1052                 u16 f_cnt = 0;
1053                 u32 temp  = 0;
1054
1055                 /* Interrupt force enable. */
1056                 pci_read_config_byte(dev, 0x5a, &scr1);
1057                 if (scr1 & 0x10)
1058                         pci_write_config_byte(dev, 0x5a, scr1 & ~0x10);
1059
1060                 /*
1061                  * HighPoint does this for HPT372A.
1062                  * NOTE: This register is only writeable via I/O space.
1063                  */
1064                 if (info->chip_type == HPT372A)
1065                         outb(0x0e, io_base + 0x9c);
1066
1067                 /*
1068                  * Default to PCI clock. Make sure MA15/16 are set to output
1069                  * to prevent drives having problems with 40-pin cables.
1070                  */
1071                 pci_write_config_byte(dev, 0x5b, 0x23);
1072
1073                 /*
1074                  * We'll have to read f_CNT value in order to determine
1075                  * the PCI clock frequency according to the following ratio:
1076                  *
1077                  * f_CNT = Fpci * 192 / Fdpll
1078                  *
1079                  * First try reading the register in which the HighPoint BIOS
1080                  * saves f_CNT value before  reprogramming the DPLL from its
1081                  * default setting (which differs for the various chips).
1082                  * NOTE: This register is only accessible via I/O space.
1083                  *
1084                  * In case the signature check fails, we'll have to resort to
1085                  * reading the f_CNT register itself in hopes that nobody has
1086                  * touched the DPLL yet...
1087                  */
1088                 temp = inl(io_base + 0x90);
1089                 if ((temp & 0xFFFFF000) != 0xABCDE000) {
1090                         int i;
1091
1092                         printk(KERN_WARNING "%s: no clock data saved by BIOS\n",
1093                                name);
1094
1095                         /* Calculate the average value of f_CNT. */
1096                         for (temp = i = 0; i < 128; i++) {
1097                                 pci_read_config_word(dev, 0x78, &f_cnt);
1098                                 temp += f_cnt & 0x1ff;
1099                                 mdelay(1);
1100                         }
1101                         f_cnt = temp / 128;
1102                 } else
1103                         f_cnt = temp & 0x1ff;
1104
1105                 dpll_clk = info->dpll_clk;
1106                 pci_clk  = (f_cnt * dpll_clk) / 192;
1107
1108                 /* Clamp PCI clock to bands. */
1109                 if (pci_clk < 40)
1110                         pci_clk = 33;
1111                 else if(pci_clk < 45)
1112                         pci_clk = 40;
1113                 else if(pci_clk < 55)
1114                         pci_clk = 50;
1115                 else
1116                         pci_clk = 66;
1117
1118                 printk(KERN_INFO "%s: DPLL base: %d MHz, f_CNT: %d, "
1119                        "assuming %d MHz PCI\n", name, dpll_clk, f_cnt, pci_clk);
1120         } else {
1121                 u32 itr1 = 0;
1122
1123                 pci_read_config_dword(dev, 0x40, &itr1);
1124
1125                 /* Detect PCI clock by looking at cmd_high_time. */
1126                 switch((itr1 >> 8) & 0x07) {
1127                         case 0x09:
1128                                 pci_clk = 40;
1129                                 break;
1130                         case 0x05:
1131                                 pci_clk = 25;
1132                                 break;
1133                         case 0x07:
1134                         default:
1135                                 pci_clk = 33;
1136                                 break;
1137                 }
1138         }
1139
1140         /* Let's assume we'll use PCI clock for the ATA clock... */
1141         switch (pci_clk) {
1142                 case 25:
1143                         clock = ATA_CLOCK_25MHZ;
1144                         break;
1145                 case 33:
1146                 default:
1147                         clock = ATA_CLOCK_33MHZ;
1148                         break;
1149                 case 40:
1150                         clock = ATA_CLOCK_40MHZ;
1151                         break;
1152                 case 50:
1153                         clock = ATA_CLOCK_50MHZ;
1154                         break;
1155                 case 66:
1156                         clock = ATA_CLOCK_66MHZ;
1157                         break;
1158         }
1159
1160         /*
1161          * Only try the DPLL if we don't have a table for the PCI clock that
1162          * we are running at for HPT370/A, always use it  for anything newer...
1163          *
1164          * NOTE: Using the internal DPLL results in slow reads on 33 MHz PCI.
1165          * We also  don't like using  the DPLL because this causes glitches
1166          * on PRST-/SRST- when the state engine gets reset...
1167          */
1168         if (info->chip_type >= HPT374 || info->settings[clock] == NULL) {
1169                 u16 f_low, delta = pci_clk < 50 ? 2 : 4;
1170                 int adjust;
1171
1172                  /*
1173                   * Select 66 MHz DPLL clock only if UltraATA/133 mode is
1174                   * supported/enabled, use 50 MHz DPLL clock otherwise...
1175                   */
1176                 if (info->max_mode == 0x04) {
1177                         dpll_clk = 66;
1178                         clock = ATA_CLOCK_66MHZ;
1179                 } else if (dpll_clk) {  /* HPT36x chips don't have DPLL */
1180                         dpll_clk = 50;
1181                         clock = ATA_CLOCK_50MHZ;
1182                 }
1183
1184                 if (info->settings[clock] == NULL) {
1185                         printk(KERN_ERR "%s: unknown bus timing!\n", name);
1186                         kfree(info);
1187                         return -EIO;
1188                 }
1189
1190                 /* Select the DPLL clock. */
1191                 pci_write_config_byte(dev, 0x5b, 0x21);
1192
1193                 /*
1194                  * Adjust the DPLL based upon PCI clock, enable it,
1195                  * and wait for stabilization...
1196                  */
1197                 f_low = (pci_clk * 48) / dpll_clk;
1198
1199                 for (adjust = 0; adjust < 8; adjust++) {
1200                         if(hpt37x_calibrate_dpll(dev, f_low, f_low + delta))
1201                                 break;
1202
1203                         /*
1204                          * See if it'll settle at a fractionally different clock
1205                          */
1206                         if (adjust & 1)
1207                                 f_low -= adjust >> 1;
1208                         else
1209                                 f_low += adjust >> 1;
1210                 }
1211                 if (adjust == 8) {
1212                         printk(KERN_ERR "%s: DPLL did not stabilize!\n", name);
1213                         kfree(info);
1214                         return -EIO;
1215                 }
1216
1217                 printk("%s: using %d MHz DPLL clock\n", name, dpll_clk);
1218         } else {
1219                 /* Mark the fact that we're not using the DPLL. */
1220                 dpll_clk = 0;
1221
1222                 printk("%s: using %d MHz PCI clock\n", name, pci_clk);
1223         }
1224
1225         /*
1226          * Advance the table pointer to a slot which points to the list
1227          * of the register values settings matching the clock being used.
1228          */
1229         info->settings += clock;
1230
1231         /* Store the clock frequencies. */
1232         info->dpll_clk  = dpll_clk;
1233         info->pci_clk   = pci_clk;
1234
1235         /* Point to this chip's own instance of the hpt_info structure. */
1236         pci_set_drvdata(dev, info);
1237
1238         if (info->chip_type >= HPT370) {
1239                 u8  mcr1, mcr4;
1240
1241                 /*
1242                  * Reset the state engines.
1243                  * NOTE: Avoid accidentally enabling the disabled channels.
1244                  */
1245                 pci_read_config_byte (dev, 0x50, &mcr1);
1246                 pci_read_config_byte (dev, 0x54, &mcr4);
1247                 pci_write_config_byte(dev, 0x50, (mcr1 | 0x32));
1248                 pci_write_config_byte(dev, 0x54, (mcr4 | 0x32));
1249                 udelay(100);
1250         }
1251
1252         /*
1253          * On  HPT371N, if ATA clock is 66 MHz we must set bit 2 in
1254          * the MISC. register to stretch the UltraDMA Tss timing.
1255          * NOTE: This register is only writeable via I/O space.
1256          */
1257         if (info->chip_type == HPT371N && clock == ATA_CLOCK_66MHZ)
1258
1259                 outb(inb(io_base + 0x9c) | 0x04, io_base + 0x9c);
1260
1261         return dev->irq;
1262 }
1263
1264 static void __devinit init_hwif_hpt366(ide_hwif_t *hwif)
1265 {
1266         struct pci_dev  *dev            = hwif->pci_dev;
1267         struct hpt_info *info           = pci_get_drvdata(dev);
1268         int serialize                   = HPT_SERIALIZE_IO;
1269         u8  scr1 = 0, ata66             = (hwif->channel) ? 0x01 : 0x02;
1270         u8  chip_type                   = info->chip_type;
1271         u8  new_mcr, old_mcr            = 0;
1272
1273         /* Cache the channel's MISC. control registers' offset */
1274         hwif->select_data               = hwif->channel ? 0x54 : 0x50;
1275
1276         hwif->tuneproc                  = &hpt3xx_tune_drive;
1277         hwif->speedproc                 = &hpt3xx_tune_chipset;
1278         hwif->quirkproc                 = &hpt3xx_quirkproc;
1279         hwif->intrproc                  = &hpt3xx_intrproc;
1280         hwif->maskproc                  = &hpt3xx_maskproc;
1281         hwif->busproc                   = &hpt3xx_busproc;
1282
1283         /*
1284          * HPT3xxN chips have some complications:
1285          *
1286          * - on 33 MHz PCI we must clock switch
1287          * - on 66 MHz PCI we must NOT use the PCI clock
1288          */
1289         if (chip_type >= HPT372N && info->dpll_clk && info->pci_clk < 66) {
1290                 /*
1291                  * Clock is shared between the channels,
1292                  * so we'll have to serialize them... :-(
1293                  */
1294                 serialize = 1;
1295                 hwif->rw_disk = &hpt3xxn_rw_disk;
1296         }
1297
1298         /* Serialize access to this device if needed */
1299         if (serialize && hwif->mate)
1300                 hwif->serialized = hwif->mate->serialized = 1;
1301
1302         /*
1303          * Disable the "fast interrupt" prediction.  Don't hold off
1304          * on interrupts. (== 0x01 despite what the docs say)
1305          */
1306         pci_read_config_byte(dev, hwif->select_data + 1, &old_mcr);
1307
1308         if (info->chip_type >= HPT374)
1309                 new_mcr = old_mcr & ~0x07;
1310         else if (info->chip_type >= HPT370) {
1311                 new_mcr = old_mcr;
1312                 new_mcr &= ~0x02;
1313
1314 #ifdef HPT_DELAY_INTERRUPT
1315                 new_mcr &= ~0x01;
1316 #else
1317                 new_mcr |=  0x01;
1318 #endif
1319         } else                                  /* HPT366 and HPT368  */
1320                 new_mcr = old_mcr & ~0x80;
1321
1322         if (new_mcr != old_mcr)
1323                 pci_write_config_byte(dev, hwif->select_data + 1, new_mcr);
1324
1325         if (!hwif->dma_base) {
1326                 hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
1327                 return;
1328         }
1329
1330         hwif->ultra_mask = 0x7f;
1331         hwif->mwdma_mask = 0x07;
1332
1333         /*
1334          * The HPT37x uses the CBLID pins as outputs for MA15/MA16
1335          * address lines to access an external EEPROM.  To read valid
1336          * cable detect state the pins must be enabled as inputs.
1337          */
1338         if (chip_type == HPT374 && (PCI_FUNC(dev->devfn) & 1)) {
1339                 /*
1340                  * HPT374 PCI function 1
1341                  * - set bit 15 of reg 0x52 to enable TCBLID as input
1342                  * - set bit 15 of reg 0x56 to enable FCBLID as input
1343                  */
1344                 u8  mcr_addr = hwif->select_data + 2;
1345                 u16 mcr;
1346
1347                 pci_read_config_word (dev, mcr_addr, &mcr);
1348                 pci_write_config_word(dev, mcr_addr, (mcr | 0x8000));
1349                 /* now read cable id register */
1350                 pci_read_config_byte (dev, 0x5a, &scr1);
1351                 pci_write_config_word(dev, mcr_addr, mcr);
1352         } else if (chip_type >= HPT370) {
1353                 /*
1354                  * HPT370/372 and 374 pcifn 0
1355                  * - clear bit 0 of reg 0x5b to enable P/SCBLID as inputs
1356                  */
1357                 u8 scr2 = 0;
1358
1359                 pci_read_config_byte (dev, 0x5b, &scr2);
1360                 pci_write_config_byte(dev, 0x5b, (scr2 & ~1));
1361                 /* now read cable id register */
1362                 pci_read_config_byte (dev, 0x5a, &scr1);
1363                 pci_write_config_byte(dev, 0x5b,  scr2);
1364         } else
1365                 pci_read_config_byte (dev, 0x5a, &scr1);
1366
1367         if (!hwif->udma_four)
1368                 hwif->udma_four = (scr1 & ata66) ? 0 : 1;
1369
1370         hwif->ide_dma_check             = &hpt366_config_drive_xfer_rate;
1371
1372         if (chip_type >= HPT374) {
1373                 hwif->ide_dma_test_irq  = &hpt374_ide_dma_test_irq;
1374                 hwif->ide_dma_end       = &hpt374_ide_dma_end;
1375         } else if (chip_type >= HPT370) {
1376                 hwif->dma_start         = &hpt370_ide_dma_start;
1377                 hwif->ide_dma_end       = &hpt370_ide_dma_end;
1378                 hwif->ide_dma_timeout   = &hpt370_ide_dma_timeout;
1379         } else
1380                 hwif->ide_dma_lostirq   = &hpt366_ide_dma_lostirq;
1381
1382         if (!noautodma)
1383                 hwif->autodma = 1;
1384         hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma;
1385 }
1386
1387 static void __devinit init_dma_hpt366(ide_hwif_t *hwif, unsigned long dmabase)
1388 {
1389         struct pci_dev  *dev            = hwif->pci_dev;
1390         u8 masterdma    = 0, slavedma   = 0;
1391         u8 dma_new      = 0, dma_old    = 0;
1392         unsigned long flags;
1393
1394         if (!dmabase)
1395                 return;
1396
1397         dma_old = hwif->INB(dmabase + 2);
1398
1399         local_irq_save(flags);
1400
1401         dma_new = dma_old;
1402         pci_read_config_byte(dev, hwif->channel ? 0x4b : 0x43, &masterdma);
1403         pci_read_config_byte(dev, hwif->channel ? 0x4f : 0x47,  &slavedma);
1404
1405         if (masterdma & 0x30)   dma_new |= 0x20;
1406         if ( slavedma & 0x30)   dma_new |= 0x40;
1407         if (dma_new != dma_old)
1408                 hwif->OUTB(dma_new, dmabase + 2);
1409
1410         local_irq_restore(flags);
1411
1412         ide_setup_dma(hwif, dmabase, 8);
1413 }
1414
1415 static int __devinit init_setup_hpt374(struct pci_dev *dev, ide_pci_device_t *d)
1416 {
1417         struct pci_dev *dev2;
1418
1419         if (PCI_FUNC(dev->devfn) & 1)
1420                 return -ENODEV;
1421
1422         pci_set_drvdata(dev, &hpt374);
1423
1424         if ((dev2 = pci_get_slot(dev->bus, dev->devfn + 1)) != NULL) {
1425                 int ret;
1426
1427                 pci_set_drvdata(dev2, &hpt374);
1428
1429                 if (dev2->irq != dev->irq) {
1430                         /* FIXME: we need a core pci_set_interrupt() */
1431                         dev2->irq = dev->irq;
1432                         printk(KERN_WARNING "%s: PCI config space interrupt "
1433                                "fixed.\n", d->name);
1434                 }
1435                 ret = ide_setup_pci_devices(dev, dev2, d);
1436                 if (ret < 0)
1437                         pci_dev_put(dev2);
1438                 return ret;
1439         }
1440         return ide_setup_pci_device(dev, d);
1441 }
1442
1443 static int __devinit init_setup_hpt372n(struct pci_dev *dev, ide_pci_device_t *d)
1444 {
1445         pci_set_drvdata(dev, &hpt372n);
1446
1447         return ide_setup_pci_device(dev, d);
1448 }
1449
1450 static int __devinit init_setup_hpt371(struct pci_dev *dev, ide_pci_device_t *d)
1451 {
1452         struct hpt_info *info;
1453         u8 rev = 0, mcr1 = 0;
1454
1455         pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
1456
1457         if (rev > 1) {
1458                 d->name = "HPT371N";
1459
1460                 info = &hpt371n;
1461         } else
1462                 info = &hpt371;
1463
1464         /*
1465          * HPT371 chips physically have only one channel, the secondary one,
1466          * but the primary channel registers do exist!  Go figure...
1467          * So,  we manually disable the non-existing channel here
1468          * (if the BIOS hasn't done this already).
1469          */
1470         pci_read_config_byte(dev, 0x50, &mcr1);
1471         if (mcr1 & 0x04)
1472                 pci_write_config_byte(dev, 0x50, mcr1 & ~0x04);
1473
1474         pci_set_drvdata(dev, info);
1475
1476         return ide_setup_pci_device(dev, d);
1477 }
1478
1479 static int __devinit init_setup_hpt372a(struct pci_dev *dev, ide_pci_device_t *d)
1480 {
1481         struct hpt_info *info;
1482         u8 rev = 0;
1483
1484         pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
1485
1486         if (rev > 1) {
1487                 d->name = "HPT372N";
1488
1489                 info = &hpt372n;
1490         } else
1491                 info = &hpt372a;
1492         pci_set_drvdata(dev, info);
1493
1494         return ide_setup_pci_device(dev, d);
1495 }
1496
1497 static int __devinit init_setup_hpt302(struct pci_dev *dev, ide_pci_device_t *d)
1498 {
1499         struct hpt_info *info;
1500         u8 rev = 0;
1501
1502         pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
1503
1504         if (rev > 1) {
1505                 d->name = "HPT302N";
1506
1507                 info = &hpt302n;
1508         } else
1509                 info = &hpt302;
1510         pci_set_drvdata(dev, info);
1511
1512         return ide_setup_pci_device(dev, d);
1513 }
1514
1515 static int __devinit init_setup_hpt366(struct pci_dev *dev, ide_pci_device_t *d)
1516 {
1517         struct pci_dev *dev2;
1518         u8 rev = 0;
1519         static char   *chipset_names[] = { "HPT366", "HPT366",  "HPT368",
1520                                            "HPT370", "HPT370A", "HPT372",
1521                                            "HPT372N" };
1522         static struct hpt_info *info[] = { &hpt36x,  &hpt36x,  &hpt36x,
1523                                            &hpt370,  &hpt370a, &hpt372,
1524                                            &hpt372n  };
1525
1526         if (PCI_FUNC(dev->devfn) & 1)
1527                 return -ENODEV;
1528
1529         pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
1530
1531         if (rev > 6)
1532                 rev = 6;
1533
1534         d->name = chipset_names[rev];
1535
1536         pci_set_drvdata(dev, info[rev]);
1537
1538         if (rev > 2)
1539                 goto init_single;
1540
1541         d->channels = 1;
1542
1543         if ((dev2 = pci_get_slot(dev->bus, dev->devfn + 1)) != NULL) {
1544                 u8  pin1 = 0, pin2 = 0;
1545                 int ret;
1546
1547                 pci_set_drvdata(dev2, info[rev]);
1548
1549                 pci_read_config_byte(dev,  PCI_INTERRUPT_PIN, &pin1);
1550                 pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin2);
1551                 if (pin1 != pin2 && dev->irq == dev2->irq) {
1552                         d->bootable = ON_BOARD;
1553                         printk("%s: onboard version of chipset, pin1=%d pin2=%d\n",
1554                                d->name, pin1, pin2);
1555                 }
1556                 ret = ide_setup_pci_devices(dev, dev2, d);
1557                 if (ret < 0)
1558                         pci_dev_put(dev2);
1559                 return ret;
1560         }
1561 init_single:
1562         return ide_setup_pci_device(dev, d);
1563 }
1564
1565 static ide_pci_device_t hpt366_chipsets[] __devinitdata = {
1566         {       /* 0 */
1567                 .name           = "HPT366",
1568                 .init_setup     = init_setup_hpt366,
1569                 .init_chipset   = init_chipset_hpt366,
1570                 .init_hwif      = init_hwif_hpt366,
1571                 .init_dma       = init_dma_hpt366,
1572                 .channels       = 2,
1573                 .autodma        = AUTODMA,
1574                 .enablebits     = {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
1575                 .bootable       = OFF_BOARD,
1576                 .extra          = 240
1577         },{     /* 1 */
1578                 .name           = "HPT372A",
1579                 .init_setup     = init_setup_hpt372a,
1580                 .init_chipset   = init_chipset_hpt366,
1581                 .init_hwif      = init_hwif_hpt366,
1582                 .init_dma       = init_dma_hpt366,
1583                 .channels       = 2,
1584                 .autodma        = AUTODMA,
1585                 .enablebits     = {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
1586                 .bootable       = OFF_BOARD,
1587                 .extra          = 240
1588         },{     /* 2 */
1589                 .name           = "HPT302",
1590                 .init_setup     = init_setup_hpt302,
1591                 .init_chipset   = init_chipset_hpt366,
1592                 .init_hwif      = init_hwif_hpt366,
1593                 .init_dma       = init_dma_hpt366,
1594                 .channels       = 2,
1595                 .autodma        = AUTODMA,
1596                 .enablebits     = {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
1597                 .bootable       = OFF_BOARD,
1598                 .extra          = 240
1599         },{     /* 3 */
1600                 .name           = "HPT371",
1601                 .init_setup     = init_setup_hpt371,
1602                 .init_chipset   = init_chipset_hpt366,
1603                 .init_hwif      = init_hwif_hpt366,
1604                 .init_dma       = init_dma_hpt366,
1605                 .channels       = 2,
1606                 .autodma        = AUTODMA,
1607                 .enablebits     = {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
1608                 .bootable       = OFF_BOARD,
1609                 .extra          = 240
1610         },{     /* 4 */
1611                 .name           = "HPT374",
1612                 .init_setup     = init_setup_hpt374,
1613                 .init_chipset   = init_chipset_hpt366,
1614                 .init_hwif      = init_hwif_hpt366,
1615                 .init_dma       = init_dma_hpt366,
1616                 .channels       = 2,    /* 4 */
1617                 .autodma        = AUTODMA,
1618                 .enablebits     = {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
1619                 .bootable       = OFF_BOARD,
1620                 .extra          = 240
1621         },{     /* 5 */
1622                 .name           = "HPT372N",
1623                 .init_setup     = init_setup_hpt372n,
1624                 .init_chipset   = init_chipset_hpt366,
1625                 .init_hwif      = init_hwif_hpt366,
1626                 .init_dma       = init_dma_hpt366,
1627                 .channels       = 2,    /* 4 */
1628                 .autodma        = AUTODMA,
1629                 .enablebits     = {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
1630                 .bootable       = OFF_BOARD,
1631                 .extra          = 240
1632         }
1633 };
1634
1635 /**
1636  *      hpt366_init_one -       called when an HPT366 is found
1637  *      @dev: the hpt366 device
1638  *      @id: the matching pci id
1639  *
1640  *      Called when the PCI registration layer (or the IDE initialization)
1641  *      finds a device matching our IDE device tables.
1642  *
1643  *      NOTE: since we'll have to modify some fields of the ide_pci_device_t
1644  *      structure depending on the chip's revision, we'd better pass a local
1645  *      copy down the call chain...
1646  */
1647 static int __devinit hpt366_init_one(struct pci_dev *dev, const struct pci_device_id *id)
1648 {
1649         ide_pci_device_t d = hpt366_chipsets[id->driver_data];
1650
1651         return d.init_setup(dev, &d);
1652 }
1653
1654 static struct pci_device_id hpt366_pci_tbl[] = {
1655         { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT366, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1656         { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT372, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
1657         { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT302, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
1658         { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT371, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
1659         { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT374, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
1660         { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT372N, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
1661         { 0, },
1662 };
1663 MODULE_DEVICE_TABLE(pci, hpt366_pci_tbl);
1664
1665 static struct pci_driver driver = {
1666         .name           = "HPT366_IDE",
1667         .id_table       = hpt366_pci_tbl,
1668         .probe          = hpt366_init_one,
1669 };
1670
1671 static int __init hpt366_ide_init(void)
1672 {
1673         return ide_pci_register_driver(&driver);
1674 }
1675
1676 module_init(hpt366_ide_init);
1677
1678 MODULE_AUTHOR("Andre Hedrick");
1679 MODULE_DESCRIPTION("PCI driver module for Highpoint HPT366 IDE");
1680 MODULE_LICENSE("GPL");