git.oblomov.eu Git - linux-2.6/blob - 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 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
  33
  34 #include <linux/types.h>
  35 #include <linux/module.h>
  36 #include <linux/kernel.h>
  37 #include <linux/delay.h>
  38 #include <linux/platform_device.h>
  39
  40 #include <linux/init.h>
  41 #include <linux/ide.h>
  42 #include <linux/sysdev.h>
  43
  44 #include <linux/dma-mapping.h>
  45
  46 #include "ide-timing.h"
  47
  48 #include <asm/io.h>
  49 #include <asm/mach-au1x00/au1xxx.h>
  50 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  51
  52 #include <asm/mach-au1x00/au1xxx_ide.h>
  53
  54 #define DRV_NAME        "au1200-ide"
  55 #define DRV_VERSION     "1.0"
  56 #define DRV_AUTHOR      "Enrico Walther <enrico.walther@amd.com> / Pete Popov <ppopov@embeddedalley.com>"
  57
  58 /* enable the burstmode in the dbdma */
  59 #define IDE_AU1XXX_BURSTMODE    1
  60
  61 static _auide_hwif auide_hwif;
  62 static int dbdma_init_done;
  63
  64 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
  65
  66 void auide_insw(unsigned long port, void *addr, u32 count)
  67 {
  68         _auide_hwif *ahwif = &auide_hwif;
  69         chan_tab_t *ctp;
  70         au1x_ddma_desc_t *dp;
  71
  72         if(!put_dest_flags(ahwif->rx_chan, (void*)addr, count << 1,
  73                            DDMA_FLAGS_NOIE)) {
  74                 printk(KERN_ERR "%s failed %d\n", __FUNCTION__, __LINE__);
  75                 return;
  76         }
  77         ctp = *((chan_tab_t **)ahwif->rx_chan);
  78         dp = ctp->cur_ptr;
  79         while (dp->dscr_cmd0 & DSCR_CMD0_V)
  80                 ;
  81         ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
  82 }
  83
  84 void auide_outsw(unsigned long port, void *addr, u32 count)
  85 {
  86         _auide_hwif *ahwif = &auide_hwif;
  87         chan_tab_t *ctp;
  88         au1x_ddma_desc_t *dp;
  89
  90         if(!put_source_flags(ahwif->tx_chan, (void*)addr,
  91                              count << 1, DDMA_FLAGS_NOIE)) {
  92                 printk(KERN_ERR "%s failed %d\n", __FUNCTION__, __LINE__);
  93                 return;
  94         }
  95         ctp = *((chan_tab_t **)ahwif->tx_chan);
  96         dp = ctp->cur_ptr;
  97         while (dp->dscr_cmd0 & DSCR_CMD0_V)
  98                 ;
  99         ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
 100 }
 101
 102 #endif
 103
 104 static void auide_tune_drive(ide_drive_t *drive, byte pio)
 105 {
 106         int mem_sttime;
 107         int mem_stcfg;
 108         u8 speed;
 109
 110         /* get the best pio mode for the drive */
 111         pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
 112
 113         printk(KERN_INFO "%s: setting Au1XXX IDE to PIO mode%d\n",
 114                drive->name, pio);
 115
 116         mem_sttime = 0;
 117         mem_stcfg  = au_readl(MEM_STCFG2);
 118
 119         /* set pio mode! */
 120         switch(pio) {
 121         case 0:
 122                 mem_sttime = SBC_IDE_TIMING(PIO0);
 123
 124                 /* set configuration for RCS2# */
 125                 mem_stcfg |= TS_MASK;
 126                 mem_stcfg &= ~TCSOE_MASK;
 127                 mem_stcfg &= ~TOECS_MASK;
 128                 mem_stcfg |= SBC_IDE_PIO0_TCSOE | SBC_IDE_PIO0_TOECS;
 129                 break;
 130
 131         case 1:
 132                 mem_sttime = SBC_IDE_TIMING(PIO1);
 133
 134                 /* set configuration for RCS2# */
 135                 mem_stcfg |= TS_MASK;
 136                 mem_stcfg &= ~TCSOE_MASK;
 137                 mem_stcfg &= ~TOECS_MASK;
 138                 mem_stcfg |= SBC_IDE_PIO1_TCSOE | SBC_IDE_PIO1_TOECS;
 139                 break;
 140
 141         case 2:
 142                 mem_sttime = SBC_IDE_TIMING(PIO2);
 143
 144                 /* set configuration for RCS2# */
 145                 mem_stcfg &= ~TS_MASK;
 146                 mem_stcfg &= ~TCSOE_MASK;
 147                 mem_stcfg &= ~TOECS_MASK;
 148                 mem_stcfg |= SBC_IDE_PIO2_TCSOE | SBC_IDE_PIO2_TOECS;
 149                 break;
 150
 151         case 3:
 152                 mem_sttime = SBC_IDE_TIMING(PIO3);
 153
 154                 /* set configuration for RCS2# */
 155                 mem_stcfg &= ~TS_MASK;
 156                 mem_stcfg &= ~TCSOE_MASK;
 157                 mem_stcfg &= ~TOECS_MASK;
 158                 mem_stcfg |= SBC_IDE_PIO3_TCSOE | SBC_IDE_PIO3_TOECS;
 159
 160                 break;
 161
 162         case 4:
 163                 mem_sttime = SBC_IDE_TIMING(PIO4);
 164
 165                 /* set configuration for RCS2# */
 166                 mem_stcfg &= ~TS_MASK;
 167                 mem_stcfg &= ~TCSOE_MASK;
 168                 mem_stcfg &= ~TOECS_MASK;
 169                 mem_stcfg |= SBC_IDE_PIO4_TCSOE | SBC_IDE_PIO4_TOECS;
 170                 break;
 171         }
 172
 173         au_writel(mem_sttime,MEM_STTIME2);
 174         au_writel(mem_stcfg,MEM_STCFG2);
 175
 176         speed = pio + XFER_PIO_0;
 177         ide_config_drive_speed(drive, speed);
 178 }
 179
 180 static int auide_tune_chipset (ide_drive_t *drive, u8 speed)
 181 {
 182         int mem_sttime;
 183         int mem_stcfg;
 184         unsigned long mode;
 185
 186 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 187         if (ide_use_dma(drive))
 188                 mode = ide_dma_speed(drive, 0);
 189 #endif
 190
 191         mem_sttime = 0;
 192         mem_stcfg  = au_readl(MEM_STCFG2);
 193
 194         if (speed >= XFER_PIO_0 && speed <= XFER_PIO_4) {
 195                 auide_tune_drive(drive, speed - XFER_PIO_0);
 196                 return 0;
 197         }
 198
 199         switch(speed) {
 200 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 201         case XFER_MW_DMA_2:
 202                 mem_sttime = SBC_IDE_TIMING(MDMA2);
 203
 204                 /* set configuration for RCS2# */
 205                 mem_stcfg &= ~TS_MASK;
 206                 mem_stcfg &= ~TCSOE_MASK;
 207                 mem_stcfg &= ~TOECS_MASK;
 208                 mem_stcfg |= SBC_IDE_MDMA2_TCSOE | SBC_IDE_MDMA2_TOECS;
 209
 210                 mode = XFER_MW_DMA_2;
 211                 break;
 212         case XFER_MW_DMA_1:
 213                 mem_sttime = SBC_IDE_TIMING(MDMA1);
 214
 215                 /* set configuration for RCS2# */
 216                 mem_stcfg &= ~TS_MASK;
 217                 mem_stcfg &= ~TCSOE_MASK;
 218                 mem_stcfg &= ~TOECS_MASK;
 219                 mem_stcfg |= SBC_IDE_MDMA1_TCSOE | SBC_IDE_MDMA1_TOECS;
 220
 221                 mode = XFER_MW_DMA_1;
 222                 break;
 223         case XFER_MW_DMA_0:
 224                 mem_sttime = SBC_IDE_TIMING(MDMA0);
 225
 226                 /* set configuration for RCS2# */
 227                 mem_stcfg |= TS_MASK;
 228                 mem_stcfg &= ~TCSOE_MASK;
 229                 mem_stcfg &= ~TOECS_MASK;
 230                 mem_stcfg |= SBC_IDE_MDMA0_TCSOE | SBC_IDE_MDMA0_TOECS;
 231
 232                 mode = XFER_MW_DMA_0;
 233                 break;
 234 #endif
 235         default:
 236                 return 1;
 237         }
 238
 239         if (ide_config_drive_speed(drive, mode))
 240                 return 1;
 241
 242         au_writel(mem_sttime,MEM_STTIME2);
 243         au_writel(mem_stcfg,MEM_STCFG2);
 244
 245         return 0;
 246 }
 247
 248 /*
 249  * Multi-Word DMA + DbDMA functions
 250  */
 251
 252 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 253
 254 static int auide_build_sglist(ide_drive_t *drive,  struct request *rq)
 255 {
 256         ide_hwif_t *hwif = drive->hwif;
 257         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 258         struct scatterlist *sg = hwif->sg_table;
 259
 260         ide_map_sg(drive, rq);
 261
 262         if (rq_data_dir(rq) == READ)
 263                 hwif->sg_dma_direction = DMA_FROM_DEVICE;
 264         else
 265                 hwif->sg_dma_direction = DMA_TO_DEVICE;
 266
 267         return dma_map_sg(ahwif->dev, sg, hwif->sg_nents,
 268                           hwif->sg_dma_direction);
 269 }
 270
 271 static int auide_build_dmatable(ide_drive_t *drive)
 272 {
 273         int i, iswrite, count = 0;
 274         ide_hwif_t *hwif = HWIF(drive);
 275
 276         struct request *rq = HWGROUP(drive)->rq;
 277
 278         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 279         struct scatterlist *sg;
 280
 281         iswrite = (rq_data_dir(rq) == WRITE);
 282         /* Save for interrupt context */
 283         ahwif->drive = drive;
 284
 285         /* Build sglist */
 286         hwif->sg_nents = i = auide_build_sglist(drive, rq);
 287
 288         if (!i)
 289                 return 0;
 290
 291         /* fill the descriptors */
 292         sg = hwif->sg_table;
 293         while (i && sg_dma_len(sg)) {
 294                 u32 cur_addr;
 295                 u32 cur_len;
 296
 297                 cur_addr = sg_dma_address(sg);
 298                 cur_len = sg_dma_len(sg);
 299
 300                 while (cur_len) {
 301                         u32 flags = DDMA_FLAGS_NOIE;
 302                         unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
 303
 304                         if (++count >= PRD_ENTRIES) {
 305                                 printk(KERN_WARNING "%s: DMA table too small\n",
 306                                        drive->name);
 307                                 goto use_pio_instead;
 308                         }
 309
 310                         /* Lets enable intr for the last descriptor only */
 311                         if (1==i)
 312                                 flags = DDMA_FLAGS_IE;
 313                         else
 314                                 flags = DDMA_FLAGS_NOIE;
 315
 316                         if (iswrite) {
 317                                 if(!put_source_flags(ahwif->tx_chan,
 318                                                      (void*)(page_address(sg->page)
 319                                                              + sg->offset),
 320                                                      tc, flags)) {
 321                                         printk(KERN_ERR "%s failed %d\n",
 322                                                __FUNCTION__, __LINE__);
 323                                 }
 324                         } else
 325                         {
 326                                 if(!put_dest_flags(ahwif->rx_chan,
 327                                                    (void*)(page_address(sg->page)
 328                                                            + sg->offset),
 329                                                    tc, flags)) {
 330                                         printk(KERN_ERR "%s failed %d\n",
 331                                                __FUNCTION__, __LINE__);
 332                                 }
 333                         }
 334
 335                         cur_addr += tc;
 336                         cur_len -= tc;
 337                 }
 338                 sg++;
 339                 i--;
 340         }
 341
 342         if (count)
 343                 return 1;
 344
 345  use_pio_instead:
 346         dma_unmap_sg(ahwif->dev,
 347                      hwif->sg_table,
 348                      hwif->sg_nents,
 349                      hwif->sg_dma_direction);
 350
 351         return 0; /* revert to PIO for this request */
 352 }
 353
 354 static int auide_dma_end(ide_drive_t *drive)
 355 {
 356         ide_hwif_t *hwif = HWIF(drive);
 357         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 358
 359         if (hwif->sg_nents) {
 360                 dma_unmap_sg(ahwif->dev, hwif->sg_table, hwif->sg_nents,
 361                              hwif->sg_dma_direction);
 362                 hwif->sg_nents = 0;
 363         }
 364
 365         return 0;
 366 }
 367
 368 static void auide_dma_start(ide_drive_t *drive )
 369 {
 370 }
 371
 372
 373 static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command)
 374 {
 375         /* issue cmd to drive */
 376         ide_execute_command(drive, command, &ide_dma_intr,
 377                             (2*WAIT_CMD), NULL);
 378 }
 379
 380 static int auide_dma_setup(ide_drive_t *drive)
 381 {
 382         struct request *rq = HWGROUP(drive)->rq;
 383
 384         if (!auide_build_dmatable(drive)) {
 385                 ide_map_sg(drive, rq);
 386                 return 1;
 387         }
 388
 389         drive->waiting_for_dma = 1;
 390         return 0;
 391 }
 392
 393 static int auide_dma_check(ide_drive_t *drive)
 394 {
 395         u8 speed;
 396
 397 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 398
 399         if( dbdma_init_done == 0 ){
 400                 auide_hwif.white_list = ide_in_drive_list(drive->id,
 401                                                           dma_white_list);
 402                 auide_hwif.black_list = ide_in_drive_list(drive->id,
 403                                                           dma_black_list);
 404                 auide_hwif.drive = drive;
 405                 auide_ddma_init(&auide_hwif);
 406                 dbdma_init_done = 1;
 407         }
 408 #endif
 409
 410         /* Is the drive in our DMA black list? */
 411
 412         if ( auide_hwif.black_list ) {
 413                 drive->using_dma = 0;
 414
 415                 /* Borrowed the warning message from ide-dma.c */
 416
 417                 printk(KERN_WARNING "%s: Disabling DMA for %s (blacklisted)\n",
 418                        drive->name, drive->id->model);
 419         }
 420         else
 421                 drive->using_dma = 1;
 422
 423         speed = ide_find_best_mode(drive, XFER_PIO | XFER_MWDMA);
 424
 425         if (drive->autodma && (speed & XFER_MODE) != XFER_PIO)
 426                 return HWIF(drive)->ide_dma_on(drive);
 427
 428         return HWIF(drive)->ide_dma_off_quietly(drive);
 429 }
 430
 431 static int auide_dma_test_irq(ide_drive_t *drive)
 432 {
 433         if (drive->waiting_for_dma == 0)
 434                 printk(KERN_WARNING "%s: ide_dma_test_irq \
 435                                      called while not waiting\n", drive->name);
 436
 437         /* If dbdma didn't execute the STOP command yet, the
 438          * active bit is still set
 439          */
 440         drive->waiting_for_dma++;
 441         if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
 442                 printk(KERN_WARNING "%s: timeout waiting for ddma to \
 443                                      complete\n", drive->name);
 444                 return 1;
 445         }
 446         udelay(10);
 447         return 0;
 448 }
 449
 450 static int auide_dma_host_on(ide_drive_t *drive)
 451 {
 452         return 0;
 453 }
 454
 455 static int auide_dma_on(ide_drive_t *drive)
 456 {
 457         drive->using_dma = 1;
 458         return auide_dma_host_on(drive);
 459 }
 460
 461
 462 static int auide_dma_host_off(ide_drive_t *drive)
 463 {
 464         return 0;
 465 }
 466
 467 static int auide_dma_off_quietly(ide_drive_t *drive)
 468 {
 469         drive->using_dma = 0;
 470         return auide_dma_host_off(drive);
 471 }
 472
 473 static int auide_dma_lostirq(ide_drive_t *drive)
 474 {
 475         printk(KERN_ERR "%s: IRQ lost\n", drive->name);
 476         return 0;
 477 }
 478
 479 static void auide_ddma_tx_callback(int irq, void *param, struct pt_regs *regs)
 480 {
 481         _auide_hwif *ahwif = (_auide_hwif*)param;
 482         ahwif->drive->waiting_for_dma = 0;
 483 }
 484
 485 static void auide_ddma_rx_callback(int irq, void *param, struct pt_regs *regs)
 486 {
 487         _auide_hwif *ahwif = (_auide_hwif*)param;
 488         ahwif->drive->waiting_for_dma = 0;
 489 }
 490
 491 #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 492
 493 static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize, u32 devwidth, u32 flags)
 494 {
 495         dev->dev_id          = dev_id;
 496         dev->dev_physaddr    = (u32)AU1XXX_ATA_PHYS_ADDR;
 497         dev->dev_intlevel    = 0;
 498         dev->dev_intpolarity = 0;
 499         dev->dev_tsize       = tsize;
 500         dev->dev_devwidth    = devwidth;
 501         dev->dev_flags       = flags;
 502 }
 503
 504 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
 505
 506 static int auide_dma_timeout(ide_drive_t *drive)
 507 {
 508 //      printk("%s\n", __FUNCTION__);
 509
 510         printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
 511
 512         if (HWIF(drive)->ide_dma_test_irq(drive))
 513                 return 0;
 514
 515         return HWIF(drive)->ide_dma_end(drive);
 516 }
 517
 518
 519 static int auide_ddma_init(_auide_hwif *auide) {
 520
 521         dbdev_tab_t source_dev_tab, target_dev_tab;
 522         u32 dev_id, tsize, devwidth, flags;
 523         ide_hwif_t *hwif = auide->hwif;
 524
 525         dev_id   = AU1XXX_ATA_DDMA_REQ;
 526
 527         if (auide->white_list || auide->black_list) {
 528                 tsize    = 8;
 529                 devwidth = 32;
 530         }
 531         else {
 532                 tsize    = 1;
 533                 devwidth = 16;
 534
 535                 printk(KERN_ERR "au1xxx-ide: %s is not on ide driver whitelist.\n",auide_hwif.drive->id->model);
 536                 printk(KERN_ERR "            please read 'Documentation/mips/AU1xxx_IDE.README'");
 537         }
 538
 539 #ifdef IDE_AU1XXX_BURSTMODE
 540         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 541 #else
 542         flags = DEV_FLAGS_SYNC;
 543 #endif
 544
 545         /* setup dev_tab for tx channel */
 546         auide_init_dbdma_dev( &source_dev_tab,
 547                               dev_id,
 548                               tsize, devwidth, DEV_FLAGS_OUT | flags);
 549         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 550
 551         auide_init_dbdma_dev( &source_dev_tab,
 552                               dev_id,
 553                               tsize, devwidth, DEV_FLAGS_IN | flags);
 554         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 555
 556         /* We also need to add a target device for the DMA */
 557         auide_init_dbdma_dev( &target_dev_tab,
 558                               (u32)DSCR_CMD0_ALWAYS,
 559                               tsize, devwidth, DEV_FLAGS_ANYUSE);
 560         auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab);
 561
 562         /* Get a channel for TX */
 563         auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id,
 564                                                  auide->tx_dev_id,
 565                                                  auide_ddma_tx_callback,
 566                                                  (void*)auide);
 567
 568         /* Get a channel for RX */
 569         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 570                                                  auide->target_dev_id,
 571                                                  auide_ddma_rx_callback,
 572                                                  (void*)auide);
 573
 574         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 575                                                              NUM_DESCRIPTORS);
 576         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 577                                                              NUM_DESCRIPTORS);
 578
 579         hwif->dmatable_cpu = dma_alloc_coherent(auide->dev,
 580                                                 PRD_ENTRIES * PRD_BYTES,        /* 1 Page */
 581                                                 &hwif->dmatable_dma, GFP_KERNEL);
 582
 583         au1xxx_dbdma_start( auide->tx_chan );
 584         au1xxx_dbdma_start( auide->rx_chan );
 585
 586         return 0;
 587 }
 588 #else
 589
 590 static int auide_ddma_init( _auide_hwif *auide )
 591 {
 592         dbdev_tab_t source_dev_tab;
 593         int flags;
 594
 595 #ifdef IDE_AU1XXX_BURSTMODE
 596         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 597 #else
 598         flags = DEV_FLAGS_SYNC;
 599 #endif
 600
 601         /* setup dev_tab for tx channel */
 602         auide_init_dbdma_dev( &source_dev_tab,
 603                               (u32)DSCR_CMD0_ALWAYS,
 604                               8, 32, DEV_FLAGS_OUT | flags);
 605         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 606
 607         auide_init_dbdma_dev( &source_dev_tab,
 608                               (u32)DSCR_CMD0_ALWAYS,
 609                               8, 32, DEV_FLAGS_IN | flags);
 610         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 611
 612         /* Get a channel for TX */
 613         auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
 614                                                  auide->tx_dev_id,
 615                                                  NULL,
 616                                                  (void*)auide);
 617
 618         /* Get a channel for RX */
 619         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 620                                                  DSCR_CMD0_ALWAYS,
 621                                                  NULL,
 622                                                  (void*)auide);
 623
 624         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 625                                                              NUM_DESCRIPTORS);
 626         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 627                                                              NUM_DESCRIPTORS);
 628
 629         au1xxx_dbdma_start( auide->tx_chan );
 630         au1xxx_dbdma_start( auide->rx_chan );
 631
 632         return 0;
 633 }
 634 #endif
 635
 636 static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
 637 {
 638         int i;
 639         unsigned long *ata_regs = hw->io_ports;
 640
 641         /* FIXME? */
 642         for (i = 0; i < IDE_CONTROL_OFFSET; i++) {
 643                 *ata_regs++ = ahwif->regbase + (i << AU1XXX_ATA_REG_OFFSET);
 644         }
 645
 646         /* set the Alternative Status register */
 647         *ata_regs = ahwif->regbase + (14 << AU1XXX_ATA_REG_OFFSET);
 648 }
 649
 650 static int au_ide_probe(struct device *dev)
 651 {
 652         struct platform_device *pdev = to_platform_device(dev);
 653         _auide_hwif *ahwif = &auide_hwif;
 654         ide_hwif_t *hwif;
 655         struct resource *res;
 656         int ret = 0;
 657
 658 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
 659         char *mode = "MWDMA2";
 660 #elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
 661         char *mode = "PIO+DDMA(offload)";
 662 #endif
 663
 664         memset(&auide_hwif, 0, sizeof(_auide_hwif));
 665         auide_hwif.dev                  = 0;
 666
 667         ahwif->dev = dev;
 668         ahwif->irq = platform_get_irq(pdev, 0);
 669
 670         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 671
 672         if (res == NULL) {
 673                 pr_debug("%s %d: no base address\n", DRV_NAME, pdev->id);
 674                 ret = -ENODEV;
 675                 goto out;
 676         }
 677
 678         if (!request_mem_region (res->start, res->end-res->start, pdev->name)) {
 679                 pr_debug("%s: request_mem_region failed\n", DRV_NAME);
 680                 ret =  -EBUSY;
 681                 goto out;
 682         }
 683
 684         ahwif->regbase = (u32)ioremap(res->start, res->end-res->start);
 685         if (ahwif->regbase == 0) {
 686                 ret = -ENOMEM;
 687                 goto out;
 688         }
 689
 690         /* FIXME:  This might possibly break PCMCIA IDE devices */
 691
 692         hwif                            = &ide_hwifs[pdev->id];
 693         hw_regs_t *hw                   = &hwif->hw;
 694         hwif->irq = hw->irq             = ahwif->irq;
 695         hwif->chipset                   = ide_au1xxx;
 696
 697         auide_setup_ports(hw, ahwif);
 698         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 699
 700         hwif->ultra_mask                = 0x0;  /* Disable Ultra DMA */
 701 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 702         hwif->mwdma_mask                = 0x07; /* Multimode-2 DMA  */
 703         hwif->swdma_mask                = 0x00;
 704 #else
 705         hwif->mwdma_mask                = 0x0;
 706         hwif->swdma_mask                = 0x0;
 707 #endif
 708
 709         hwif->noprobe = 0;
 710         hwif->drives[0].unmask          = 1;
 711         hwif->drives[1].unmask          = 1;
 712
 713         /* hold should be on in all cases */
 714         hwif->hold                      = 1;
 715         hwif->mmio                      = 2;
 716
 717         /* If the user has selected DDMA assisted copies,
 718            then set up a few local I/O function entry points
 719         */
 720
 721 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 722         hwif->INSW                      = auide_insw;
 723         hwif->OUTSW                     = auide_outsw;
 724 #endif
 725
 726         hwif->tuneproc                  = &auide_tune_drive;
 727         hwif->speedproc                 = &auide_tune_chipset;
 728
 729 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 730         hwif->ide_dma_off_quietly       = &auide_dma_off_quietly;
 731         hwif->ide_dma_timeout           = &auide_dma_timeout;
 732
 733         hwif->ide_dma_check             = &auide_dma_check;
 734         hwif->dma_exec_cmd              = &auide_dma_exec_cmd;
 735         hwif->dma_start                 = &auide_dma_start;
 736         hwif->ide_dma_end               = &auide_dma_end;
 737         hwif->dma_setup                 = &auide_dma_setup;
 738         hwif->ide_dma_test_irq          = &auide_dma_test_irq;
 739         hwif->ide_dma_host_off          = &auide_dma_host_off;
 740         hwif->ide_dma_host_on           = &auide_dma_host_on;
 741         hwif->ide_dma_lostirq           = &auide_dma_lostirq;
 742         hwif->ide_dma_on                = &auide_dma_on;
 743
 744         hwif->autodma                   = 1;
 745         hwif->drives[0].autodma         = hwif->autodma;
 746         hwif->drives[1].autodma         = hwif->autodma;
 747         hwif->atapi_dma                 = 1;
 748
 749 #else /* !CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 750         hwif->autodma                   = 0;
 751         hwif->channel                   = 0;
 752         hwif->hold                      = 1;
 753         hwif->select_data               = 0;    /* no chipset-specific code */
 754         hwif->config_data               = 0;    /* no chipset-specific code */
 755
 756         hwif->drives[0].autodma         = 0;
 757         hwif->drives[0].autotune        = 1;    /* 1=autotune, 2=noautotune, 0=default */
 758 #endif
 759         hwif->drives[0].no_io_32bit     = 1;
 760
 761         auide_hwif.hwif                 = hwif;
 762         hwif->hwif_data                 = &auide_hwif;
 763
 764 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 765         auide_ddma_init(&auide_hwif);
 766         dbdma_init_done = 1;
 767 #endif
 768
 769         probe_hwif_init(hwif);
 770         dev_set_drvdata(dev, hwif);
 771
 772         printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
 773
 774  out:
 775         return ret;
 776 }
 777
 778 static int au_ide_remove(struct device *dev)
 779 {
 780         struct platform_device *pdev = to_platform_device(dev);
 781         struct resource *res;
 782         ide_hwif_t *hwif = dev_get_drvdata(dev);
 783         _auide_hwif *ahwif = &auide_hwif;
 784
 785         ide_unregister(hwif - ide_hwifs);
 786
 787         iounmap((void *)ahwif->regbase);
 788
 789         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 790         release_mem_region(res->start, res->end - res->start);
 791
 792         return 0;
 793 }
 794
 795 static struct device_driver au1200_ide_driver = {
 796         .name           = "au1200-ide",
 797         .bus            = &platform_bus_type,
 798         .probe          = au_ide_probe,
 799         .remove         = au_ide_remove,
 800 };
 801
 802 static int __init au_ide_init(void)
 803 {
 804         return driver_register(&au1200_ide_driver);
 805 }
 806
 807 static void __exit au_ide_exit(void)
 808 {
 809         driver_unregister(&au1200_ide_driver);
 810 }
 811
 812 MODULE_LICENSE("GPL");
 813 MODULE_DESCRIPTION("AU1200 IDE driver");
 814
 815 module_init(au_ide_init);
 816 module_exit(au_ide_exit);