drivers/ide/mips/au1xxx-ide.c

   1 /*
   2  * linux/drivers/ide/mips/au1xxx-ide.c  version 01.30.00        Aug. 02 2005
   3  *
   4  * BRIEF MODULE DESCRIPTION
   5  * AMD Alchemy Au1xxx IDE interface routines over the Static Bus
   6  *
   7  * Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
   8  *
   9  * This program is free software; you can redistribute it and/or modify it under
  10  * the terms of the GNU General Public License as published by the Free Software
  11  * Foundation; either version 2 of the License, or (at your option) any later
  12  * version.
  13  *
  14  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  15  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  23  * POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  * You should have received a copy of the GNU General Public License along with
  26  * this program; if not, write to the Free Software Foundation, Inc.,
  27  * 675 Mass Ave, Cambridge, MA 02139, USA.
  28  *
  29  * Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
  30  *       Interface and Linux Device Driver" Application Note.
  31  */
  32 #include <linux/types.h>
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/delay.h>
  36 #include <linux/platform_device.h>
  37
  38 #include <linux/init.h>
  39 #include <linux/ide.h>
  40 #include <linux/sysdev.h>
  41
  42 #include <linux/dma-mapping.h>
  43
  44 #include "ide-timing.h"
  45
  46 #include <asm/io.h>
  47 #include <asm/mach-au1x00/au1xxx.h>
  48 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  49
  50 #include <asm/mach-au1x00/au1xxx_ide.h>
  51
  52 #define DRV_NAME        "au1200-ide"
  53 #define DRV_VERSION     "1.0"
  54 #define DRV_AUTHOR      "Enrico Walther <enrico.walther@amd.com> / Pete Popov <ppopov@embeddedalley.com>"
  55
  56 /* enable the burstmode in the dbdma */
  57 #define IDE_AU1XXX_BURSTMODE    1
  58
  59 static _auide_hwif auide_hwif;
  60 static int dbdma_init_done;
  61
  62 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
  63
  64 void auide_insw(unsigned long port, void *addr, u32 count)
  65 {
  66         _auide_hwif *ahwif = &auide_hwif;
  67         chan_tab_t *ctp;
  68         au1x_ddma_desc_t *dp;
  69
  70         if(!put_dest_flags(ahwif->rx_chan, (void*)addr, count << 1,
  71                            DDMA_FLAGS_NOIE)) {
  72                 printk(KERN_ERR "%s failed %d\n", __FUNCTION__, __LINE__);
  73                 return;
  74         }
  75         ctp = *((chan_tab_t **)ahwif->rx_chan);
  76         dp = ctp->cur_ptr;
  77         while (dp->dscr_cmd0 & DSCR_CMD0_V)
  78                 ;
  79         ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
  80 }
  81
  82 void auide_outsw(unsigned long port, void *addr, u32 count)
  83 {
  84         _auide_hwif *ahwif = &auide_hwif;
  85         chan_tab_t *ctp;
  86         au1x_ddma_desc_t *dp;
  87
  88         if(!put_source_flags(ahwif->tx_chan, (void*)addr,
  89                              count << 1, DDMA_FLAGS_NOIE)) {
  90                 printk(KERN_ERR "%s failed %d\n", __FUNCTION__, __LINE__);
  91                 return;
  92         }
  93         ctp = *((chan_tab_t **)ahwif->tx_chan);
  94         dp = ctp->cur_ptr;
  95         while (dp->dscr_cmd0 & DSCR_CMD0_V)
  96                 ;
  97         ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
  98 }
  99
 100 #endif
 101
 102 static void au1xxx_set_pio_mode(ide_drive_t *drive, const u8 pio)
 103 {
 104         int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
 105
 106         /* set pio mode! */
 107         switch(pio) {
 108         case 0:
 109                 mem_sttime = SBC_IDE_TIMING(PIO0);
 110
 111                 /* set configuration for RCS2# */
 112                 mem_stcfg |= TS_MASK;
 113                 mem_stcfg &= ~TCSOE_MASK;
 114                 mem_stcfg &= ~TOECS_MASK;
 115                 mem_stcfg |= SBC_IDE_PIO0_TCSOE | SBC_IDE_PIO0_TOECS;
 116                 break;
 117
 118         case 1:
 119                 mem_sttime = SBC_IDE_TIMING(PIO1);
 120
 121                 /* set configuration for RCS2# */
 122                 mem_stcfg |= TS_MASK;
 123                 mem_stcfg &= ~TCSOE_MASK;
 124                 mem_stcfg &= ~TOECS_MASK;
 125                 mem_stcfg |= SBC_IDE_PIO1_TCSOE | SBC_IDE_PIO1_TOECS;
 126                 break;
 127
 128         case 2:
 129                 mem_sttime = SBC_IDE_TIMING(PIO2);
 130
 131                 /* set configuration for RCS2# */
 132                 mem_stcfg &= ~TS_MASK;
 133                 mem_stcfg &= ~TCSOE_MASK;
 134                 mem_stcfg &= ~TOECS_MASK;
 135                 mem_stcfg |= SBC_IDE_PIO2_TCSOE | SBC_IDE_PIO2_TOECS;
 136                 break;
 137
 138         case 3:
 139                 mem_sttime = SBC_IDE_TIMING(PIO3);
 140
 141                 /* set configuration for RCS2# */
 142                 mem_stcfg &= ~TS_MASK;
 143                 mem_stcfg &= ~TCSOE_MASK;
 144                 mem_stcfg &= ~TOECS_MASK;
 145                 mem_stcfg |= SBC_IDE_PIO3_TCSOE | SBC_IDE_PIO3_TOECS;
 146
 147                 break;
 148
 149         case 4:
 150                 mem_sttime = SBC_IDE_TIMING(PIO4);
 151
 152                 /* set configuration for RCS2# */
 153                 mem_stcfg &= ~TS_MASK;
 154                 mem_stcfg &= ~TCSOE_MASK;
 155                 mem_stcfg &= ~TOECS_MASK;
 156                 mem_stcfg |= SBC_IDE_PIO4_TCSOE | SBC_IDE_PIO4_TOECS;
 157                 break;
 158         }
 159
 160         au_writel(mem_sttime,MEM_STTIME2);
 161         au_writel(mem_stcfg,MEM_STCFG2);
 162 }
 163
 164 static void auide_set_dma_mode(ide_drive_t *drive, const u8 speed)
 165 {
 166         int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
 167
 168         switch(speed) {
 169 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 170         case XFER_MW_DMA_2:
 171                 mem_sttime = SBC_IDE_TIMING(MDMA2);
 172
 173                 /* set configuration for RCS2# */
 174                 mem_stcfg &= ~TS_MASK;
 175                 mem_stcfg &= ~TCSOE_MASK;
 176                 mem_stcfg &= ~TOECS_MASK;
 177                 mem_stcfg |= SBC_IDE_MDMA2_TCSOE | SBC_IDE_MDMA2_TOECS;
 178
 179                 break;
 180         case XFER_MW_DMA_1:
 181                 mem_sttime = SBC_IDE_TIMING(MDMA1);
 182
 183                 /* set configuration for RCS2# */
 184                 mem_stcfg &= ~TS_MASK;
 185                 mem_stcfg &= ~TCSOE_MASK;
 186                 mem_stcfg &= ~TOECS_MASK;
 187                 mem_stcfg |= SBC_IDE_MDMA1_TCSOE | SBC_IDE_MDMA1_TOECS;
 188
 189                 break;
 190         case XFER_MW_DMA_0:
 191                 mem_sttime = SBC_IDE_TIMING(MDMA0);
 192
 193                 /* set configuration for RCS2# */
 194                 mem_stcfg |= TS_MASK;
 195                 mem_stcfg &= ~TCSOE_MASK;
 196                 mem_stcfg &= ~TOECS_MASK;
 197                 mem_stcfg |= SBC_IDE_MDMA0_TCSOE | SBC_IDE_MDMA0_TOECS;
 198
 199                 break;
 200 #endif
 201         default:
 202                 return;
 203         }
 204
 205         au_writel(mem_sttime,MEM_STTIME2);
 206         au_writel(mem_stcfg,MEM_STCFG2);
 207 }
 208
 209 /*
 210  * Multi-Word DMA + DbDMA functions
 211  */
 212
 213 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 214
 215 static int auide_build_sglist(ide_drive_t *drive,  struct request *rq)
 216 {
 217         ide_hwif_t *hwif = drive->hwif;
 218         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 219         struct scatterlist *sg = hwif->sg_table;
 220
 221         ide_map_sg(drive, rq);
 222
 223         if (rq_data_dir(rq) == READ)
 224                 hwif->sg_dma_direction = DMA_FROM_DEVICE;
 225         else
 226                 hwif->sg_dma_direction = DMA_TO_DEVICE;
 227
 228         return dma_map_sg(ahwif->dev, sg, hwif->sg_nents,
 229                           hwif->sg_dma_direction);
 230 }
 231
 232 static int auide_build_dmatable(ide_drive_t *drive)
 233 {
 234         int i, iswrite, count = 0;
 235         ide_hwif_t *hwif = HWIF(drive);
 236
 237         struct request *rq = HWGROUP(drive)->rq;
 238
 239         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 240         struct scatterlist *sg;
 241
 242         iswrite = (rq_data_dir(rq) == WRITE);
 243         /* Save for interrupt context */
 244         ahwif->drive = drive;
 245
 246         /* Build sglist */
 247         hwif->sg_nents = i = auide_build_sglist(drive, rq);
 248
 249         if (!i)
 250                 return 0;
 251
 252         /* fill the descriptors */
 253         sg = hwif->sg_table;
 254         while (i && sg_dma_len(sg)) {
 255                 u32 cur_addr;
 256                 u32 cur_len;
 257
 258                 cur_addr = sg_dma_address(sg);
 259                 cur_len = sg_dma_len(sg);
 260
 261                 while (cur_len) {
 262                         u32 flags = DDMA_FLAGS_NOIE;
 263                         unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
 264
 265                         if (++count >= PRD_ENTRIES) {
 266                                 printk(KERN_WARNING "%s: DMA table too small\n",
 267                                        drive->name);
 268                                 goto use_pio_instead;
 269                         }
 270
 271                         /* Lets enable intr for the last descriptor only */
 272                         if (1==i)
 273                                 flags = DDMA_FLAGS_IE;
 274                         else
 275                                 flags = DDMA_FLAGS_NOIE;
 276
 277                         if (iswrite) {
 278                                 if(!put_source_flags(ahwif->tx_chan,
 279                                                      (void*)(page_address(sg->page)
 280                                                              + sg->offset),
 281                                                      tc, flags)) {
 282                                         printk(KERN_ERR "%s failed %d\n",
 283                                                __FUNCTION__, __LINE__);
 284                                 }
 285                         } else
 286                         {
 287                                 if(!put_dest_flags(ahwif->rx_chan,
 288                                                    (void*)(page_address(sg->page)
 289                                                            + sg->offset),
 290                                                    tc, flags)) {
 291                                         printk(KERN_ERR "%s failed %d\n",
 292                                                __FUNCTION__, __LINE__);
 293                                 }
 294                         }
 295
 296                         cur_addr += tc;
 297                         cur_len -= tc;
 298                 }
 299                 sg = sg_next(sg);
 300                 i--;
 301         }
 302
 303         if (count)
 304                 return 1;
 305
 306  use_pio_instead:
 307         dma_unmap_sg(ahwif->dev,
 308                      hwif->sg_table,
 309                      hwif->sg_nents,
 310                      hwif->sg_dma_direction);
 311
 312         return 0; /* revert to PIO for this request */
 313 }
 314
 315 static int auide_dma_end(ide_drive_t *drive)
 316 {
 317         ide_hwif_t *hwif = HWIF(drive);
 318         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 319
 320         if (hwif->sg_nents) {
 321                 dma_unmap_sg(ahwif->dev, hwif->sg_table, hwif->sg_nents,
 322                              hwif->sg_dma_direction);
 323                 hwif->sg_nents = 0;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static void auide_dma_start(ide_drive_t *drive )
 330 {
 331 }
 332
 333
 334 static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command)
 335 {
 336         /* issue cmd to drive */
 337         ide_execute_command(drive, command, &ide_dma_intr,
 338                             (2*WAIT_CMD), NULL);
 339 }
 340
 341 static int auide_dma_setup(ide_drive_t *drive)
 342 {
 343         struct request *rq = HWGROUP(drive)->rq;
 344
 345         if (!auide_build_dmatable(drive)) {
 346                 ide_map_sg(drive, rq);
 347                 return 1;
 348         }
 349
 350         drive->waiting_for_dma = 1;
 351         return 0;
 352 }
 353
 354 static int auide_dma_check(ide_drive_t *drive)
 355 {
 356         u8 speed = ide_max_dma_mode(drive);
 357
 358         if( dbdma_init_done == 0 ){
 359                 auide_hwif.white_list = ide_in_drive_list(drive->id,
 360                                                           dma_white_list);
 361                 auide_hwif.black_list = ide_in_drive_list(drive->id,
 362                                                           dma_black_list);
 363                 auide_hwif.drive = drive;
 364                 auide_ddma_init(&auide_hwif);
 365                 dbdma_init_done = 1;
 366         }
 367
 368         /* Is the drive in our DMA black list? */
 369
 370         if ( auide_hwif.black_list ) {
 371                 drive->using_dma = 0;
 372
 373                 /* Borrowed the warning message from ide-dma.c */
 374
 375                 printk(KERN_WARNING "%s: Disabling DMA for %s (blacklisted)\n",
 376                        drive->name, drive->id->model);
 377         }
 378         else
 379                 drive->using_dma = 1;
 380
 381         if (drive->autodma && (speed & XFER_MODE) != XFER_PIO)
 382                 return 0;
 383
 384         return -1;
 385 }
 386
 387 static int auide_dma_test_irq(ide_drive_t *drive)
 388 {
 389         if (drive->waiting_for_dma == 0)
 390                 printk(KERN_WARNING "%s: ide_dma_test_irq \
 391                                      called while not waiting\n", drive->name);
 392
 393         /* If dbdma didn't execute the STOP command yet, the
 394          * active bit is still set
 395          */
 396         drive->waiting_for_dma++;
 397         if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
 398                 printk(KERN_WARNING "%s: timeout waiting for ddma to \
 399                                      complete\n", drive->name);
 400                 return 1;
 401         }
 402         udelay(10);
 403         return 0;
 404 }
 405
 406 static void auide_dma_host_on(ide_drive_t *drive)
 407 {
 408 }
 409
 410 static int auide_dma_on(ide_drive_t *drive)
 411 {
 412         drive->using_dma = 1;
 413
 414         return 0;
 415 }
 416
 417 static void auide_dma_host_off(ide_drive_t *drive)
 418 {
 419 }
 420
 421 static void auide_dma_off_quietly(ide_drive_t *drive)
 422 {
 423         drive->using_dma = 0;
 424 }
 425
 426 static void auide_dma_lost_irq(ide_drive_t *drive)
 427 {
 428         printk(KERN_ERR "%s: IRQ lost\n", drive->name);
 429 }
 430
 431 static void auide_ddma_tx_callback(int irq, void *param)
 432 {
 433         _auide_hwif *ahwif = (_auide_hwif*)param;
 434         ahwif->drive->waiting_for_dma = 0;
 435 }
 436
 437 static void auide_ddma_rx_callback(int irq, void *param)
 438 {
 439         _auide_hwif *ahwif = (_auide_hwif*)param;
 440         ahwif->drive->waiting_for_dma = 0;
 441 }
 442
 443 #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 444
 445 static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize, u32 devwidth, u32 flags)
 446 {
 447         dev->dev_id          = dev_id;
 448         dev->dev_physaddr    = (u32)AU1XXX_ATA_PHYS_ADDR;
 449         dev->dev_intlevel    = 0;
 450         dev->dev_intpolarity = 0;
 451         dev->dev_tsize       = tsize;
 452         dev->dev_devwidth    = devwidth;
 453         dev->dev_flags       = flags;
 454 }
 455
 456 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
 457
 458 static void auide_dma_timeout(ide_drive_t *drive)
 459 {
 460         ide_hwif_t *hwif = HWIF(drive);
 461
 462         printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
 463
 464         if (hwif->ide_dma_test_irq(drive))
 465                 return;
 466
 467         hwif->ide_dma_end(drive);
 468 }
 469
 470
 471 static int auide_ddma_init(_auide_hwif *auide) {
 472
 473         dbdev_tab_t source_dev_tab, target_dev_tab;
 474         u32 dev_id, tsize, devwidth, flags;
 475         ide_hwif_t *hwif = auide->hwif;
 476
 477         dev_id   = AU1XXX_ATA_DDMA_REQ;
 478
 479         if (auide->white_list || auide->black_list) {
 480                 tsize    = 8;
 481                 devwidth = 32;
 482         }
 483         else {
 484                 tsize    = 1;
 485                 devwidth = 16;
 486
 487                 printk(KERN_ERR "au1xxx-ide: %s is not on ide driver whitelist.\n",auide_hwif.drive->id->model);
 488                 printk(KERN_ERR "            please read 'Documentation/mips/AU1xxx_IDE.README'");
 489         }
 490
 491 #ifdef IDE_AU1XXX_BURSTMODE
 492         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 493 #else
 494         flags = DEV_FLAGS_SYNC;
 495 #endif
 496
 497         /* setup dev_tab for tx channel */
 498         auide_init_dbdma_dev( &source_dev_tab,
 499                               dev_id,
 500                               tsize, devwidth, DEV_FLAGS_OUT | flags);
 501         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 502
 503         auide_init_dbdma_dev( &source_dev_tab,
 504                               dev_id,
 505                               tsize, devwidth, DEV_FLAGS_IN | flags);
 506         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 507
 508         /* We also need to add a target device for the DMA */
 509         auide_init_dbdma_dev( &target_dev_tab,
 510                               (u32)DSCR_CMD0_ALWAYS,
 511                               tsize, devwidth, DEV_FLAGS_ANYUSE);
 512         auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab);
 513
 514         /* Get a channel for TX */
 515         auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id,
 516                                                  auide->tx_dev_id,
 517                                                  auide_ddma_tx_callback,
 518                                                  (void*)auide);
 519
 520         /* Get a channel for RX */
 521         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 522                                                  auide->target_dev_id,
 523                                                  auide_ddma_rx_callback,
 524                                                  (void*)auide);
 525
 526         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 527                                                              NUM_DESCRIPTORS);
 528         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 529                                                              NUM_DESCRIPTORS);
 530
 531         hwif->dmatable_cpu = dma_alloc_coherent(auide->dev,
 532                                                 PRD_ENTRIES * PRD_BYTES,        /* 1 Page */
 533                                                 &hwif->dmatable_dma, GFP_KERNEL);
 534
 535         au1xxx_dbdma_start( auide->tx_chan );
 536         au1xxx_dbdma_start( auide->rx_chan );
 537
 538         return 0;
 539 }
 540 #else
 541
 542 static int auide_ddma_init( _auide_hwif *auide )
 543 {
 544         dbdev_tab_t source_dev_tab;
 545         int flags;
 546
 547 #ifdef IDE_AU1XXX_BURSTMODE
 548         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 549 #else
 550         flags = DEV_FLAGS_SYNC;
 551 #endif
 552
 553         /* setup dev_tab for tx channel */
 554         auide_init_dbdma_dev( &source_dev_tab,
 555                               (u32)DSCR_CMD0_ALWAYS,
 556                               8, 32, DEV_FLAGS_OUT | flags);
 557         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 558
 559         auide_init_dbdma_dev( &source_dev_tab,
 560                               (u32)DSCR_CMD0_ALWAYS,
 561                               8, 32, DEV_FLAGS_IN | flags);
 562         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 563
 564         /* Get a channel for TX */
 565         auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
 566                                                  auide->tx_dev_id,
 567                                                  NULL,
 568                                                  (void*)auide);
 569
 570         /* Get a channel for RX */
 571         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 572                                                  DSCR_CMD0_ALWAYS,
 573                                                  NULL,
 574                                                  (void*)auide);
 575
 576         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 577                                                              NUM_DESCRIPTORS);
 578         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 579                                                              NUM_DESCRIPTORS);
 580
 581         au1xxx_dbdma_start( auide->tx_chan );
 582         au1xxx_dbdma_start( auide->rx_chan );
 583
 584         return 0;
 585 }
 586 #endif
 587
 588 static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
 589 {
 590         int i;
 591         unsigned long *ata_regs = hw->io_ports;
 592
 593         /* FIXME? */
 594         for (i = 0; i < IDE_CONTROL_OFFSET; i++) {
 595                 *ata_regs++ = ahwif->regbase + (i << AU1XXX_ATA_REG_OFFSET);
 596         }
 597
 598         /* set the Alternative Status register */
 599         *ata_regs = ahwif->regbase + (14 << AU1XXX_ATA_REG_OFFSET);
 600 }
 601
 602 static int au_ide_probe(struct device *dev)
 603 {
 604         struct platform_device *pdev = to_platform_device(dev);
 605         _auide_hwif *ahwif = &auide_hwif;
 606         ide_hwif_t *hwif;
 607         struct resource *res;
 608         hw_regs_t *hw;
 609         int ret = 0;
 610
 611 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
 612         char *mode = "MWDMA2";
 613 #elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
 614         char *mode = "PIO+DDMA(offload)";
 615 #endif
 616
 617         memset(&auide_hwif, 0, sizeof(_auide_hwif));
 618         auide_hwif.dev                  = 0;
 619
 620         ahwif->dev = dev;
 621         ahwif->irq = platform_get_irq(pdev, 0);
 622
 623         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 624
 625         if (res == NULL) {
 626                 pr_debug("%s %d: no base address\n", DRV_NAME, pdev->id);
 627                 ret = -ENODEV;
 628                 goto out;
 629         }
 630         if (ahwif->irq < 0) {
 631                 pr_debug("%s %d: no IRQ\n", DRV_NAME, pdev->id);
 632                 ret = -ENODEV;
 633                 goto out;
 634         }
 635
 636         if (!request_mem_region (res->start, res->end-res->start, pdev->name)) {
 637                 pr_debug("%s: request_mem_region failed\n", DRV_NAME);
 638                 ret =  -EBUSY;
 639                 goto out;
 640         }
 641
 642         ahwif->regbase = (u32)ioremap(res->start, res->end-res->start);
 643         if (ahwif->regbase == 0) {
 644                 ret = -ENOMEM;
 645                 goto out;
 646         }
 647
 648         /* FIXME:  This might possibly break PCMCIA IDE devices */
 649
 650         hwif                            = &ide_hwifs[pdev->id];
 651         hw                              = &hwif->hw;
 652         hwif->irq = hw->irq             = ahwif->irq;
 653         hwif->chipset                   = ide_au1xxx;
 654
 655         auide_setup_ports(hw, ahwif);
 656         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 657
 658         hwif->ultra_mask                = 0x0;  /* Disable Ultra DMA */
 659 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 660         hwif->mwdma_mask                = 0x07; /* Multimode-2 DMA  */
 661         hwif->swdma_mask                = 0x00;
 662 #else
 663         hwif->mwdma_mask                = 0x0;
 664         hwif->swdma_mask                = 0x0;
 665 #endif
 666
 667         hwif->pio_mask = ATA_PIO4;
 668         hwif->host_flags = IDE_HFLAG_POST_SET_MODE;
 669
 670         hwif->noprobe = 0;
 671         hwif->drives[0].unmask          = 1;
 672         hwif->drives[1].unmask          = 1;
 673
 674         /* hold should be on in all cases */
 675         hwif->hold                      = 1;
 676
 677         hwif->mmio  = 1;
 678
 679         /* If the user has selected DDMA assisted copies,
 680            then set up a few local I/O function entry points
 681         */
 682
 683 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 684         hwif->INSW                      = auide_insw;
 685         hwif->OUTSW                     = auide_outsw;
 686 #endif
 687
 688         hwif->set_pio_mode              = &au1xxx_set_pio_mode;
 689         hwif->set_dma_mode              = &auide_set_dma_mode;
 690
 691 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 692         hwif->dma_off_quietly           = &auide_dma_off_quietly;
 693         hwif->dma_timeout               = &auide_dma_timeout;
 694
 695         hwif->ide_dma_check             = &auide_dma_check;
 696         hwif->dma_exec_cmd              = &auide_dma_exec_cmd;
 697         hwif->dma_start                 = &auide_dma_start;
 698         hwif->ide_dma_end               = &auide_dma_end;
 699         hwif->dma_setup                 = &auide_dma_setup;
 700         hwif->ide_dma_test_irq          = &auide_dma_test_irq;
 701         hwif->dma_host_off              = &auide_dma_host_off;
 702         hwif->dma_host_on               = &auide_dma_host_on;
 703         hwif->dma_lost_irq              = &auide_dma_lost_irq;
 704         hwif->ide_dma_on                = &auide_dma_on;
 705
 706         hwif->autodma                   = 1;
 707         hwif->drives[0].autodma         = hwif->autodma;
 708         hwif->drives[1].autodma         = hwif->autodma;
 709         hwif->atapi_dma                 = 1;
 710
 711 #else /* !CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 712         hwif->autodma                   = 0;
 713         hwif->channel                   = 0;
 714         hwif->hold                      = 1;
 715         hwif->select_data               = 0;    /* no chipset-specific code */
 716         hwif->config_data               = 0;    /* no chipset-specific code */
 717
 718         hwif->drives[0].autodma         = 0;
 719         hwif->drives[0].autotune        = 1;    /* 1=autotune, 2=noautotune, 0=default */
 720 #endif
 721         hwif->drives[0].no_io_32bit     = 1;
 722
 723         auide_hwif.hwif                 = hwif;
 724         hwif->hwif_data                 = &auide_hwif;
 725
 726 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 727         auide_ddma_init(&auide_hwif);
 728         dbdma_init_done = 1;
 729 #endif
 730
 731         probe_hwif_init(hwif);
 732
 733         ide_proc_register_port(hwif);
 734
 735         dev_set_drvdata(dev, hwif);
 736
 737         printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
 738
 739  out:
 740         return ret;
 741 }
 742
 743 static int au_ide_remove(struct device *dev)
 744 {
 745         struct platform_device *pdev = to_platform_device(dev);
 746         struct resource *res;
 747         ide_hwif_t *hwif = dev_get_drvdata(dev);
 748         _auide_hwif *ahwif = &auide_hwif;
 749
 750         ide_unregister(hwif - ide_hwifs);
 751
 752         iounmap((void *)ahwif->regbase);
 753
 754         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 755         release_mem_region(res->start, res->end - res->start);
 756
 757         return 0;
 758 }
 759
 760 static struct device_driver au1200_ide_driver = {
 761         .name           = "au1200-ide",
 762         .bus            = &platform_bus_type,
 763         .probe          = au_ide_probe,
 764         .remove         = au_ide_remove,
 765 };
 766
 767 static int __init au_ide_init(void)
 768 {
 769         return driver_register(&au1200_ide_driver);
 770 }
 771
 772 static void __exit au_ide_exit(void)
 773 {
 774         driver_unregister(&au1200_ide_driver);
 775 }
 776
 777 MODULE_LICENSE("GPL");
 778 MODULE_DESCRIPTION("AU1200 IDE driver");
 779
 780 module_init(au_ide_init);
 781 module_exit(au_ide_exit);