git.oblomov.eu Git - linux-2.6/blob - drivers/ide/au1xxx-ide.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  * AMD Alchemy Au1xxx IDE interface routines over the Static Bus
   4  *
   5  * Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
   6  *
   7  * This program is free software; you can redistribute it and/or modify it under
   8  * the terms of the GNU General Public License as published by the Free Software
   9  * Foundation; either version 2 of the License, or (at your option) any later
  10  * version.
  11  *
  12  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  13  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  14  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
  15  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  16  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  17  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  18  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  19  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  20  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  21  * POSSIBILITY OF SUCH DAMAGE.
  22  *
  23  * You should have received a copy of the GNU General Public License along with
  24  * this program; if not, write to the Free Software Foundation, Inc.,
  25  * 675 Mass Ave, Cambridge, MA 02139, USA.
  26  *
  27  * Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
  28  *       Interface and Linux Device Driver" Application Note.
  29  */
  30 #include <linux/types.h>
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/delay.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/init.h>
  36 #include <linux/ide.h>
  37 #include <linux/scatterlist.h>
  38
  39 #include <asm/mach-au1x00/au1xxx.h>
  40 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  41 #include <asm/mach-au1x00/au1xxx_ide.h>
  42
  43 #define DRV_NAME        "au1200-ide"
  44 #define DRV_AUTHOR      "Enrico Walther <enrico.walther@amd.com> / Pete Popov <ppopov@embeddedalley.com>"
  45
  46 /* enable the burstmode in the dbdma */
  47 #define IDE_AU1XXX_BURSTMODE    1
  48
  49 static _auide_hwif auide_hwif;
  50
  51 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
  52
  53 void auide_insw(unsigned long port, void *addr, u32 count)
  54 {
  55         _auide_hwif *ahwif = &auide_hwif;
  56         chan_tab_t *ctp;
  57         au1x_ddma_desc_t *dp;
  58
  59         if(!put_dest_flags(ahwif->rx_chan, (void*)addr, count << 1,
  60                            DDMA_FLAGS_NOIE)) {
  61                 printk(KERN_ERR "%s failed %d\n", __func__, __LINE__);
  62                 return;
  63         }
  64         ctp = *((chan_tab_t **)ahwif->rx_chan);
  65         dp = ctp->cur_ptr;
  66         while (dp->dscr_cmd0 & DSCR_CMD0_V)
  67                 ;
  68         ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
  69 }
  70
  71 void auide_outsw(unsigned long port, void *addr, u32 count)
  72 {
  73         _auide_hwif *ahwif = &auide_hwif;
  74         chan_tab_t *ctp;
  75         au1x_ddma_desc_t *dp;
  76
  77         if(!put_source_flags(ahwif->tx_chan, (void*)addr,
  78                              count << 1, DDMA_FLAGS_NOIE)) {
  79                 printk(KERN_ERR "%s failed %d\n", __func__, __LINE__);
  80                 return;
  81         }
  82         ctp = *((chan_tab_t **)ahwif->tx_chan);
  83         dp = ctp->cur_ptr;
  84         while (dp->dscr_cmd0 & DSCR_CMD0_V)
  85                 ;
  86         ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
  87 }
  88
  89 static void au1xxx_input_data(ide_drive_t *drive, struct request *rq,
  90                               void *buf, unsigned int len)
  91 {
  92         auide_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
  93 }
  94
  95 static void au1xxx_output_data(ide_drive_t *drive, struct request *rq,
  96                                void *buf, unsigned int len)
  97 {
  98         auide_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
  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 static int auide_build_dmatable(ide_drive_t *drive)
 213 {
 214         int i, iswrite, count = 0;
 215         ide_hwif_t *hwif = HWIF(drive);
 216         struct request *rq = HWGROUP(drive)->rq;
 217         _auide_hwif *ahwif = &auide_hwif;
 218         struct scatterlist *sg;
 219
 220         iswrite = (rq_data_dir(rq) == WRITE);
 221         /* Save for interrupt context */
 222         ahwif->drive = drive;
 223
 224         hwif->sg_nents = i = ide_build_sglist(drive, rq);
 225
 226         if (!i)
 227                 return 0;
 228
 229         /* fill the descriptors */
 230         sg = hwif->sg_table;
 231         while (i && sg_dma_len(sg)) {
 232                 u32 cur_addr;
 233                 u32 cur_len;
 234
 235                 cur_addr = sg_dma_address(sg);
 236                 cur_len = sg_dma_len(sg);
 237
 238                 while (cur_len) {
 239                         u32 flags = DDMA_FLAGS_NOIE;
 240                         unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
 241
 242                         if (++count >= PRD_ENTRIES) {
 243                                 printk(KERN_WARNING "%s: DMA table too small\n",
 244                                        drive->name);
 245                                 goto use_pio_instead;
 246                         }
 247
 248                         /* Lets enable intr for the last descriptor only */
 249                         if (1==i)
 250                                 flags = DDMA_FLAGS_IE;
 251                         else
 252                                 flags = DDMA_FLAGS_NOIE;
 253
 254                         if (iswrite) {
 255                                 if(!put_source_flags(ahwif->tx_chan,
 256                                                      (void*) sg_virt(sg),
 257                                                      tc, flags)) {
 258                                         printk(KERN_ERR "%s failed %d\n",
 259                                                __func__, __LINE__);
 260                                 }
 261                         } else
 262                         {
 263                                 if(!put_dest_flags(ahwif->rx_chan,
 264                                                    (void*) sg_virt(sg),
 265                                                    tc, flags)) {
 266                                         printk(KERN_ERR "%s failed %d\n",
 267                                                __func__, __LINE__);
 268                                 }
 269                         }
 270
 271                         cur_addr += tc;
 272                         cur_len -= tc;
 273                 }
 274                 sg = sg_next(sg);
 275                 i--;
 276         }
 277
 278         if (count)
 279                 return 1;
 280
 281  use_pio_instead:
 282         ide_destroy_dmatable(drive);
 283
 284         return 0; /* revert to PIO for this request */
 285 }
 286
 287 static int auide_dma_end(ide_drive_t *drive)
 288 {
 289         ide_hwif_t *hwif = HWIF(drive);
 290
 291         if (hwif->sg_nents) {
 292                 ide_destroy_dmatable(drive);
 293                 hwif->sg_nents = 0;
 294         }
 295
 296         return 0;
 297 }
 298
 299 static void auide_dma_start(ide_drive_t *drive )
 300 {
 301 }
 302
 303
 304 static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command)
 305 {
 306         /* issue cmd to drive */
 307         ide_execute_command(drive, command, &ide_dma_intr,
 308                             (2*WAIT_CMD), NULL);
 309 }
 310
 311 static int auide_dma_setup(ide_drive_t *drive)
 312 {
 313         struct request *rq = HWGROUP(drive)->rq;
 314
 315         if (!auide_build_dmatable(drive)) {
 316                 ide_map_sg(drive, rq);
 317                 return 1;
 318         }
 319
 320         drive->waiting_for_dma = 1;
 321         return 0;
 322 }
 323
 324 static int auide_dma_test_irq(ide_drive_t *drive)
 325 {
 326         /* If dbdma didn't execute the STOP command yet, the
 327          * active bit is still set
 328          */
 329         drive->waiting_for_dma++;
 330         if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
 331                 printk(KERN_WARNING "%s: timeout waiting for ddma to \
 332                                      complete\n", drive->name);
 333                 return 1;
 334         }
 335         udelay(10);
 336         return 0;
 337 }
 338
 339 static void auide_dma_host_set(ide_drive_t *drive, int on)
 340 {
 341 }
 342
 343 static void auide_ddma_tx_callback(int irq, void *param)
 344 {
 345         _auide_hwif *ahwif = (_auide_hwif*)param;
 346         ahwif->drive->waiting_for_dma = 0;
 347 }
 348
 349 static void auide_ddma_rx_callback(int irq, void *param)
 350 {
 351         _auide_hwif *ahwif = (_auide_hwif*)param;
 352         ahwif->drive->waiting_for_dma = 0;
 353 }
 354
 355 #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 356
 357 static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize, u32 devwidth, u32 flags)
 358 {
 359         dev->dev_id          = dev_id;
 360         dev->dev_physaddr    = (u32)IDE_PHYS_ADDR;
 361         dev->dev_intlevel    = 0;
 362         dev->dev_intpolarity = 0;
 363         dev->dev_tsize       = tsize;
 364         dev->dev_devwidth    = devwidth;
 365         dev->dev_flags       = flags;
 366 }
 367
 368 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 369 static const struct ide_dma_ops au1xxx_dma_ops = {
 370         .dma_host_set           = auide_dma_host_set,
 371         .dma_setup              = auide_dma_setup,
 372         .dma_exec_cmd           = auide_dma_exec_cmd,
 373         .dma_start              = auide_dma_start,
 374         .dma_end                = auide_dma_end,
 375         .dma_test_irq           = auide_dma_test_irq,
 376         .dma_lost_irq           = ide_dma_lost_irq,
 377         .dma_timeout            = ide_dma_timeout,
 378 };
 379
 380 static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
 381 {
 382         _auide_hwif *auide = &auide_hwif;
 383         dbdev_tab_t source_dev_tab, target_dev_tab;
 384         u32 dev_id, tsize, devwidth, flags;
 385
 386         dev_id   = IDE_DDMA_REQ;
 387
 388         tsize    =  8; /*  1 */
 389         devwidth = 32; /* 16 */
 390
 391 #ifdef IDE_AU1XXX_BURSTMODE
 392         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 393 #else
 394         flags = DEV_FLAGS_SYNC;
 395 #endif
 396
 397         /* setup dev_tab for tx channel */
 398         auide_init_dbdma_dev( &source_dev_tab,
 399                               dev_id,
 400                               tsize, devwidth, DEV_FLAGS_OUT | flags);
 401         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 402
 403         auide_init_dbdma_dev( &source_dev_tab,
 404                               dev_id,
 405                               tsize, devwidth, DEV_FLAGS_IN | flags);
 406         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 407
 408         /* We also need to add a target device for the DMA */
 409         auide_init_dbdma_dev( &target_dev_tab,
 410                               (u32)DSCR_CMD0_ALWAYS,
 411                               tsize, devwidth, DEV_FLAGS_ANYUSE);
 412         auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab);
 413
 414         /* Get a channel for TX */
 415         auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id,
 416                                                  auide->tx_dev_id,
 417                                                  auide_ddma_tx_callback,
 418                                                  (void*)auide);
 419
 420         /* Get a channel for RX */
 421         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 422                                                  auide->target_dev_id,
 423                                                  auide_ddma_rx_callback,
 424                                                  (void*)auide);
 425
 426         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 427                                                              NUM_DESCRIPTORS);
 428         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 429                                                              NUM_DESCRIPTORS);
 430
 431         /* FIXME: check return value */
 432         (void)ide_allocate_dma_engine(hwif);
 433
 434         au1xxx_dbdma_start( auide->tx_chan );
 435         au1xxx_dbdma_start( auide->rx_chan );
 436
 437         return 0;
 438 }
 439 #else
 440 static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
 441 {
 442         _auide_hwif *auide = &auide_hwif;
 443         dbdev_tab_t source_dev_tab;
 444         int flags;
 445
 446 #ifdef IDE_AU1XXX_BURSTMODE
 447         flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
 448 #else
 449         flags = DEV_FLAGS_SYNC;
 450 #endif
 451
 452         /* setup dev_tab for tx channel */
 453         auide_init_dbdma_dev( &source_dev_tab,
 454                               (u32)DSCR_CMD0_ALWAYS,
 455                               8, 32, DEV_FLAGS_OUT | flags);
 456         auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 457
 458         auide_init_dbdma_dev( &source_dev_tab,
 459                               (u32)DSCR_CMD0_ALWAYS,
 460                               8, 32, DEV_FLAGS_IN | flags);
 461         auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
 462
 463         /* Get a channel for TX */
 464         auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
 465                                                  auide->tx_dev_id,
 466                                                  NULL,
 467                                                  (void*)auide);
 468
 469         /* Get a channel for RX */
 470         auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
 471                                                  DSCR_CMD0_ALWAYS,
 472                                                  NULL,
 473                                                  (void*)auide);
 474
 475         auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
 476                                                              NUM_DESCRIPTORS);
 477         auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
 478                                                              NUM_DESCRIPTORS);
 479
 480         au1xxx_dbdma_start( auide->tx_chan );
 481         au1xxx_dbdma_start( auide->rx_chan );
 482
 483         return 0;
 484 }
 485 #endif
 486
 487 static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
 488 {
 489         int i;
 490         unsigned long *ata_regs = hw->io_ports_array;
 491
 492         /* FIXME? */
 493         for (i = 0; i < 8; i++)
 494                 *ata_regs++ = ahwif->regbase + (i << IDE_REG_SHIFT);
 495
 496         /* set the Alternative Status register */
 497         *ata_regs = ahwif->regbase + (14 << IDE_REG_SHIFT);
 498 }
 499
 500 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 501 static const struct ide_tp_ops au1xxx_tp_ops = {
 502         .exec_command           = ide_exec_command,
 503         .read_status            = ide_read_status,
 504         .read_altstatus         = ide_read_altstatus,
 505         .read_sff_dma_status    = ide_read_sff_dma_status,
 506
 507         .set_irq                = ide_set_irq,
 508
 509         .tf_load                = ide_tf_load,
 510         .tf_read                = ide_tf_read,
 511
 512         .input_data             = au1xxx_input_data,
 513         .output_data            = au1xxx_output_data,
 514 };
 515 #endif
 516
 517 static const struct ide_port_ops au1xxx_port_ops = {
 518         .set_pio_mode           = au1xxx_set_pio_mode,
 519         .set_dma_mode           = auide_set_dma_mode,
 520 };
 521
 522 static const struct ide_port_info au1xxx_port_info = {
 523         .init_dma               = auide_ddma_init,
 524 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
 525         .tp_ops                 = &au1xxx_tp_ops,
 526 #endif
 527         .port_ops               = &au1xxx_port_ops,
 528 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 529         .dma_ops                = &au1xxx_dma_ops,
 530 #endif
 531         .host_flags             = IDE_HFLAG_POST_SET_MODE |
 532                                   IDE_HFLAG_NO_IO_32BIT |
 533                                   IDE_HFLAG_UNMASK_IRQS,
 534         .pio_mask               = ATA_PIO4,
 535 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 536         .mwdma_mask             = ATA_MWDMA2,
 537 #endif
 538 };
 539
 540 static int au_ide_probe(struct device *dev)
 541 {
 542         struct platform_device *pdev = to_platform_device(dev);
 543         _auide_hwif *ahwif = &auide_hwif;
 544         struct resource *res;
 545         struct ide_host *host;
 546         int ret = 0;
 547         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
 548
 549 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
 550         char *mode = "MWDMA2";
 551 #elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
 552         char *mode = "PIO+DDMA(offload)";
 553 #endif
 554
 555         memset(&auide_hwif, 0, sizeof(_auide_hwif));
 556         ahwif->irq = platform_get_irq(pdev, 0);
 557
 558         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 559
 560         if (res == NULL) {
 561                 pr_debug("%s %d: no base address\n", DRV_NAME, pdev->id);
 562                 ret = -ENODEV;
 563                 goto out;
 564         }
 565         if (ahwif->irq < 0) {
 566                 pr_debug("%s %d: no IRQ\n", DRV_NAME, pdev->id);
 567                 ret = -ENODEV;
 568                 goto out;
 569         }
 570
 571         if (!request_mem_region(res->start, res->end - res->start + 1,
 572                                 pdev->name)) {
 573                 pr_debug("%s: request_mem_region failed\n", DRV_NAME);
 574                 ret =  -EBUSY;
 575                 goto out;
 576         }
 577
 578         ahwif->regbase = (u32)ioremap(res->start, res->end - res->start + 1);
 579         if (ahwif->regbase == 0) {
 580                 ret = -ENOMEM;
 581                 goto out;
 582         }
 583
 584         memset(&hw, 0, sizeof(hw));
 585         auide_setup_ports(&hw, ahwif);
 586         hw.irq = ahwif->irq;
 587         hw.dev = dev;
 588         hw.chipset = ide_au1xxx;
 589
 590         ret = ide_host_add(&au1xxx_port_info, hws, &host);
 591         if (ret)
 592                 goto out;
 593
 594         auide_hwif.hwif = host->ports[0];
 595
 596         dev_set_drvdata(dev, host);
 597
 598         printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
 599
 600  out:
 601         return ret;
 602 }
 603
 604 static int au_ide_remove(struct device *dev)
 605 {
 606         struct platform_device *pdev = to_platform_device(dev);
 607         struct resource *res;
 608         struct ide_host *host = dev_get_drvdata(dev);
 609         _auide_hwif *ahwif = &auide_hwif;
 610
 611         ide_host_remove(host);
 612
 613         iounmap((void *)ahwif->regbase);
 614
 615         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 616         release_mem_region(res->start, res->end - res->start + 1);
 617
 618         return 0;
 619 }
 620
 621 static struct device_driver au1200_ide_driver = {
 622         .name           = "au1200-ide",
 623         .bus            = &platform_bus_type,
 624         .probe          = au_ide_probe,
 625         .remove         = au_ide_remove,
 626 };
 627
 628 static int __init au_ide_init(void)
 629 {
 630         return driver_register(&au1200_ide_driver);
 631 }
 632
 633 static void __exit au_ide_exit(void)
 634 {
 635         driver_unregister(&au1200_ide_driver);
 636 }
 637
 638 MODULE_LICENSE("GPL");
 639 MODULE_DESCRIPTION("AU1200 IDE driver");
 640
 641 module_init(au_ide_init);
 642 module_exit(au_ide_exit);