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         }
 202
 203         au_writel(mem_sttime,MEM_STTIME2);
 204         au_writel(mem_stcfg,MEM_STCFG2);
 205 }
 206
 207 /*
 208  * Multi-Word DMA + DbDMA functions
 209  */
 210
 211 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 212
 213 static int auide_build_sglist(ide_drive_t *drive,  struct request *rq)
 214 {
 215         ide_hwif_t *hwif = drive->hwif;
 216         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 217         struct scatterlist *sg = hwif->sg_table;
 218
 219         ide_map_sg(drive, rq);
 220
 221         if (rq_data_dir(rq) == READ)
 222                 hwif->sg_dma_direction = DMA_FROM_DEVICE;
 223         else
 224                 hwif->sg_dma_direction = DMA_TO_DEVICE;
 225
 226         return dma_map_sg(ahwif->dev, sg, hwif->sg_nents,
 227                           hwif->sg_dma_direction);
 228 }
 229
 230 static int auide_build_dmatable(ide_drive_t *drive)
 231 {
 232         int i, iswrite, count = 0;
 233         ide_hwif_t *hwif = HWIF(drive);
 234
 235         struct request *rq = HWGROUP(drive)->rq;
 236
 237         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 238         struct scatterlist *sg;
 239
 240         iswrite = (rq_data_dir(rq) == WRITE);
 241         /* Save for interrupt context */
 242         ahwif->drive = drive;
 243
 244         /* Build sglist */
 245         hwif->sg_nents = i = auide_build_sglist(drive, rq);
 246
 247         if (!i)
 248                 return 0;
 249
 250         /* fill the descriptors */
 251         sg = hwif->sg_table;
 252         while (i && sg_dma_len(sg)) {
 253                 u32 cur_addr;
 254                 u32 cur_len;
 255
 256                 cur_addr = sg_dma_address(sg);
 257                 cur_len = sg_dma_len(sg);
 258
 259                 while (cur_len) {
 260                         u32 flags = DDMA_FLAGS_NOIE;
 261                         unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
 262
 263                         if (++count >= PRD_ENTRIES) {
 264                                 printk(KERN_WARNING "%s: DMA table too small\n",
 265                                        drive->name);
 266                                 goto use_pio_instead;
 267                         }
 268
 269                         /* Lets enable intr for the last descriptor only */
 270                         if (1==i)
 271                                 flags = DDMA_FLAGS_IE;
 272                         else
 273                                 flags = DDMA_FLAGS_NOIE;
 274
 275                         if (iswrite) {
 276                                 if(!put_source_flags(ahwif->tx_chan,
 277                                                      (void*) sg_virt(sg),
 278                                                      tc, flags)) {
 279                                         printk(KERN_ERR "%s failed %d\n",
 280                                                __FUNCTION__, __LINE__);
 281                                 }
 282                         } else
 283                         {
 284                                 if(!put_dest_flags(ahwif->rx_chan,
 285                                                    (void*) sg_virt(sg),
 286                                                    tc, flags)) {
 287                                         printk(KERN_ERR "%s failed %d\n",
 288                                                __FUNCTION__, __LINE__);
 289                                 }
 290                         }
 291
 292                         cur_addr += tc;
 293                         cur_len -= tc;
 294                 }
 295                 sg = sg_next(sg);
 296                 i--;
 297         }
 298
 299         if (count)
 300                 return 1;
 301
 302  use_pio_instead:
 303         dma_unmap_sg(ahwif->dev,
 304                      hwif->sg_table,
 305                      hwif->sg_nents,
 306                      hwif->sg_dma_direction);
 307
 308         return 0; /* revert to PIO for this request */
 309 }
 310
 311 static int auide_dma_end(ide_drive_t *drive)
 312 {
 313         ide_hwif_t *hwif = HWIF(drive);
 314         _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
 315
 316         if (hwif->sg_nents) {
 317                 dma_unmap_sg(ahwif->dev, hwif->sg_table, hwif->sg_nents,
 318                              hwif->sg_dma_direction);
 319                 hwif->sg_nents = 0;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static void auide_dma_start(ide_drive_t *drive )
 326 {
 327 }
 328
 329
 330 static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command)
 331 {
 332         /* issue cmd to drive */
 333         ide_execute_command(drive, command, &ide_dma_intr,
 334                             (2*WAIT_CMD), NULL);
 335 }
 336
 337 static int auide_dma_setup(ide_drive_t *drive)
 338 {
 339         struct request *rq = HWGROUP(drive)->rq;
 340
 341         if (!auide_build_dmatable(drive)) {
 342                 ide_map_sg(drive, rq);
 343                 return 1;
 344         }
 345
 346         drive->waiting_for_dma = 1;
 347         return 0;
 348 }
 349
 350 static u8 auide_mdma_filter(ide_drive_t *drive)
 351 {
 352         /*
 353          * FIXME: ->white_list and ->black_list are based on completely bogus
 354          * ->ide_dma_check implementation which didn't set neither the host
 355          * controller timings nor the device for the desired transfer mode.
 356          *
 357          * They should be either removed or 0x00 MWDMA mask should be
 358          * returned for devices on the ->black_list.
 359          */
 360
 361         if (dbdma_init_done == 0) {
 362                 auide_hwif.white_list = ide_in_drive_list(drive->id,
 363                                                           dma_white_list);
 364                 auide_hwif.black_list = ide_in_drive_list(drive->id,
 365                                                           dma_black_list);
 366                 auide_hwif.drive = drive;
 367                 auide_ddma_init(&auide_hwif);
 368                 dbdma_init_done = 1;
 369         }
 370
 371         /* Is the drive in our DMA black list? */
 372         if (auide_hwif.black_list)
 373                 printk(KERN_WARNING "%s: Disabling DMA for %s (blacklisted)\n",
 374                                     drive->name, drive->id->model);
 375
 376         return drive->hwif->mwdma_mask;
 377 }
 378
 379 static int auide_dma_test_irq(ide_drive_t *drive)
 380 {
 381         if (drive->waiting_for_dma == 0)
 382                 printk(KERN_WARNING "%s: ide_dma_test_irq \
 383                                      called while not waiting\n", drive->name);
 384
 385         /* If dbdma didn't execute the STOP command yet, the
 386          * active bit is still set
 387          */
 388         drive->waiting_for_dma++;
 389         if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
 390                 printk(KERN_WARNING "%s: timeout waiting for ddma to \
 391                                      complete\n", drive->name);
 392                 return 1;
 393         }
 394         udelay(10);
 395         return 0;
 396 }
 397
 398 static void auide_dma_host_on(ide_drive_t *drive)
 399 {
 400 }
 401
 402 static void auide_dma_host_off(ide_drive_t *drive)
 403 {
 404 }
 405
 406 static void auide_dma_lost_irq(ide_drive_t *drive)
 407 {
 408         printk(KERN_ERR "%s: IRQ lost\n", drive->name);
 409 }
 410
 411 static void auide_ddma_tx_callback(int irq, void *param)
 412 {
 413         _auide_hwif *ahwif = (_auide_hwif*)param;
 414         ahwif->drive->waiting_for_dma = 0;
 415 }
 416
 417 static void auide_ddma_rx_callback(int irq, void *param)
 418 {
 419         _auide_hwif *ahwif = (_auide_hwif*)param;
 420         ahwif->drive->waiting_for_dma = 0;
 421 }
 422
 423 #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 424
 425 static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize, u32 devwidth, u32 flags)
 426 {
 427         dev->dev_id          = dev_id;
 428         dev->dev_physaddr    = (u32)AU1XXX_ATA_PHYS_ADDR;
 429         dev->dev_intlevel    = 0;
 430         dev->dev_intpolarity = 0;
 431         dev->dev_tsize       = tsize;
 432         dev->dev_devwidth    = devwidth;
 433         dev->dev_flags       = flags;
 434 }
 435
 436 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
 437
 438 static void auide_dma_timeout(ide_drive_t *drive)
 439 {
 440         ide_hwif_t *hwif = HWIF(drive);
 441
 442         printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
 443
 444         if (hwif->ide_dma_test_irq(drive))
 445                 return;
 446
 447         hwif->ide_dma_end(drive);
 448 }
 449
 450
 451 static int auide_ddma_init(_auide_hwif *auide) {
 452
 453         dbdev_tab_t source_dev_tab, target_dev_tab;
 454         u32 dev_id, tsize, devwidth, flags;
 455         ide_hwif_t *hwif = auide->hwif;
 456
 457         dev_id   = AU1XXX_ATA_DDMA_REQ;
 458
 459         if (auide->white_list || auide->black_list) {
 460                 tsize    = 8;
 461                 devwidth = 32;
 462         }
 463         else {
 464                 tsize    = 1;
 465                 devwidth = 16;
 466
 467                 printk(KERN_ERR "au1xxx-ide: %s is not on ide driver whitelist.\n",auide_hwif.drive->id->model);
 468                 printk(KERN_ERR "            please read 'Documentation/mips/AU1xxx_IDE.README'");
 469         }
 470
 471 #ifdef IDE_AU1XXX_BURSTMODE
 472         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 473 #else
 474         flags = DEV_FLAGS_SYNC;
 475 #endif
 476
 477         /* setup dev_tab for tx channel */
 478         auide_init_dbdma_dev( &source_dev_tab,
 479                               dev_id,
 480                               tsize, devwidth, DEV_FLAGS_OUT | flags);
 481         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 482
 483         auide_init_dbdma_dev( &source_dev_tab,
 484                               dev_id,
 485                               tsize, devwidth, DEV_FLAGS_IN | flags);
 486         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 487
 488         /* We also need to add a target device for the DMA */
 489         auide_init_dbdma_dev( &target_dev_tab,
 490                               (u32)DSCR_CMD0_ALWAYS,
 491                               tsize, devwidth, DEV_FLAGS_ANYUSE);
 492         auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab);
 493
 494         /* Get a channel for TX */
 495         auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id,
 496                                                  auide->tx_dev_id,
 497                                                  auide_ddma_tx_callback,
 498                                                  (void*)auide);
 499
 500         /* Get a channel for RX */
 501         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 502                                                  auide->target_dev_id,
 503                                                  auide_ddma_rx_callback,
 504                                                  (void*)auide);
 505
 506         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 507                                                              NUM_DESCRIPTORS);
 508         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 509                                                              NUM_DESCRIPTORS);
 510
 511         hwif->dmatable_cpu = dma_alloc_coherent(auide->dev,
 512                                                 PRD_ENTRIES * PRD_BYTES,        /* 1 Page */
 513                                                 &hwif->dmatable_dma, GFP_KERNEL);
 514
 515         au1xxx_dbdma_start( auide->tx_chan );
 516         au1xxx_dbdma_start( auide->rx_chan );
 517
 518         return 0;
 519 }
 520 #else
 521
 522 static int auide_ddma_init( _auide_hwif *auide )
 523 {
 524         dbdev_tab_t source_dev_tab;
 525         int flags;
 526
 527 #ifdef IDE_AU1XXX_BURSTMODE
 528         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 529 #else
 530         flags = DEV_FLAGS_SYNC;
 531 #endif
 532
 533         /* setup dev_tab for tx channel */
 534         auide_init_dbdma_dev( &source_dev_tab,
 535                               (u32)DSCR_CMD0_ALWAYS,
 536                               8, 32, DEV_FLAGS_OUT | flags);
 537         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 538
 539         auide_init_dbdma_dev( &source_dev_tab,
 540                               (u32)DSCR_CMD0_ALWAYS,
 541                               8, 32, DEV_FLAGS_IN | flags);
 542         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 543
 544         /* Get a channel for TX */
 545         auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
 546                                                  auide->tx_dev_id,
 547                                                  NULL,
 548                                                  (void*)auide);
 549
 550         /* Get a channel for RX */
 551         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 552                                                  DSCR_CMD0_ALWAYS,
 553                                                  NULL,
 554                                                  (void*)auide);
 555
 556         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 557                                                              NUM_DESCRIPTORS);
 558         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 559                                                              NUM_DESCRIPTORS);
 560
 561         au1xxx_dbdma_start( auide->tx_chan );
 562         au1xxx_dbdma_start( auide->rx_chan );
 563
 564         return 0;
 565 }
 566 #endif
 567
 568 static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
 569 {
 570         int i;
 571         unsigned long *ata_regs = hw->io_ports;
 572
 573         /* FIXME? */
 574         for (i = 0; i < IDE_CONTROL_OFFSET; i++) {
 575                 *ata_regs++ = ahwif->regbase + (i << AU1XXX_ATA_REG_OFFSET);
 576         }
 577
 578         /* set the Alternative Status register */
 579         *ata_regs = ahwif->regbase + (14 << AU1XXX_ATA_REG_OFFSET);
 580 }
 581
 582 static int au_ide_probe(struct device *dev)
 583 {
 584         struct platform_device *pdev = to_platform_device(dev);
 585         _auide_hwif *ahwif = &auide_hwif;
 586         ide_hwif_t *hwif;
 587         struct resource *res;
 588         int ret = 0;
 589         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 590         hw_regs_t hw;
 591
 592 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
 593         char *mode = "MWDMA2";
 594 #elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
 595         char *mode = "PIO+DDMA(offload)";
 596 #endif
 597
 598         memset(&auide_hwif, 0, sizeof(_auide_hwif));
 599         auide_hwif.dev                  = 0;
 600
 601         ahwif->dev = dev;
 602         ahwif->irq = platform_get_irq(pdev, 0);
 603
 604         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 605
 606         if (res == NULL) {
 607                 pr_debug("%s %d: no base address\n", DRV_NAME, pdev->id);
 608                 ret = -ENODEV;
 609                 goto out;
 610         }
 611         if (ahwif->irq < 0) {
 612                 pr_debug("%s %d: no IRQ\n", DRV_NAME, pdev->id);
 613                 ret = -ENODEV;
 614                 goto out;
 615         }
 616
 617         if (!request_mem_region (res->start, res->end-res->start, pdev->name)) {
 618                 pr_debug("%s: request_mem_region failed\n", DRV_NAME);
 619                 ret =  -EBUSY;
 620                 goto out;
 621         }
 622
 623         ahwif->regbase = (u32)ioremap(res->start, res->end-res->start);
 624         if (ahwif->regbase == 0) {
 625                 ret = -ENOMEM;
 626                 goto out;
 627         }
 628
 629         /* FIXME:  This might possibly break PCMCIA IDE devices */
 630
 631         hwif                            = &ide_hwifs[pdev->id];
 632         hwif->irq                       = ahwif->irq;
 633         hwif->chipset                   = ide_au1xxx;
 634
 635         memset(&hw, 0, sizeof(hw));
 636         auide_setup_ports(&hw, ahwif);
 637         memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
 638
 639         hwif->ultra_mask                = 0x0;  /* Disable Ultra DMA */
 640 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 641         hwif->mwdma_mask                = 0x07; /* Multimode-2 DMA  */
 642         hwif->swdma_mask                = 0x00;
 643 #else
 644         hwif->mwdma_mask                = 0x0;
 645         hwif->swdma_mask                = 0x0;
 646 #endif
 647
 648         hwif->pio_mask = ATA_PIO4;
 649         hwif->host_flags = IDE_HFLAG_POST_SET_MODE;
 650
 651         hwif->noprobe = 0;
 652         hwif->drives[0].unmask          = 1;
 653         hwif->drives[1].unmask          = 1;
 654
 655         /* hold should be on in all cases */
 656         hwif->hold                      = 1;
 657
 658         hwif->mmio  = 1;
 659
 660         /* If the user has selected DDMA assisted copies,
 661            then set up a few local I/O function entry points
 662         */
 663
 664 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 665         hwif->INSW                      = auide_insw;
 666         hwif->OUTSW                     = auide_outsw;
 667 #endif
 668
 669         hwif->set_pio_mode              = &au1xxx_set_pio_mode;
 670         hwif->set_dma_mode              = &auide_set_dma_mode;
 671
 672 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 673         hwif->dma_timeout               = &auide_dma_timeout;
 674
 675         hwif->mdma_filter               = &auide_mdma_filter;
 676
 677         hwif->dma_exec_cmd              = &auide_dma_exec_cmd;
 678         hwif->dma_start                 = &auide_dma_start;
 679         hwif->ide_dma_end               = &auide_dma_end;
 680         hwif->dma_setup                 = &auide_dma_setup;
 681         hwif->ide_dma_test_irq          = &auide_dma_test_irq;
 682         hwif->dma_host_off              = &auide_dma_host_off;
 683         hwif->dma_host_on               = &auide_dma_host_on;
 684         hwif->dma_lost_irq              = &auide_dma_lost_irq;
 685 #else /* !CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 686         hwif->channel                   = 0;
 687         hwif->hold                      = 1;
 688         hwif->select_data               = 0;    /* no chipset-specific code */
 689         hwif->config_data               = 0;    /* no chipset-specific code */
 690
 691         hwif->drives[0].autotune        = 1;    /* 1=autotune, 2=noautotune, 0=default */
 692         hwif->drives[1].autotune        = 1;
 693 #endif
 694         hwif->drives[0].no_io_32bit     = 1;
 695         hwif->drives[1].no_io_32bit     = 1;
 696
 697         auide_hwif.hwif                 = hwif;
 698         hwif->hwif_data                 = &auide_hwif;
 699
 700 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 701         auide_ddma_init(&auide_hwif);
 702         dbdma_init_done = 1;
 703 #endif
 704
 705         idx[0] = hwif->index;
 706
 707         ide_device_add(idx);
 708
 709         dev_set_drvdata(dev, hwif);
 710
 711         printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
 712
 713  out:
 714         return ret;
 715 }
 716
 717 static int au_ide_remove(struct device *dev)
 718 {
 719         struct platform_device *pdev = to_platform_device(dev);
 720         struct resource *res;
 721         ide_hwif_t *hwif = dev_get_drvdata(dev);
 722         _auide_hwif *ahwif = &auide_hwif;
 723
 724         ide_unregister(hwif - ide_hwifs);
 725
 726         iounmap((void *)ahwif->regbase);
 727
 728         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 729         release_mem_region(res->start, res->end - res->start);
 730
 731         return 0;
 732 }
 733
 734 static struct device_driver au1200_ide_driver = {
 735         .name           = "au1200-ide",
 736         .bus            = &platform_bus_type,
 737         .probe          = au_ide_probe,
 738         .remove         = au_ide_remove,
 739 };
 740
 741 static int __init au_ide_init(void)
 742 {
 743         return driver_register(&au1200_ide_driver);
 744 }
 745
 746 static void __exit au_ide_exit(void)
 747 {
 748         driver_unregister(&au1200_ide_driver);
 749 }
 750
 751 MODULE_LICENSE("GPL");
 752 MODULE_DESCRIPTION("AU1200 IDE driver");
 753
 754 module_init(au_ide_init);
 755 module_exit(au_ide_exit);