drivers/ide/pci/scc_pata.c

   1 /*
   2  * Support for IDE interfaces on Celleb platform
   3  *
   4  * (C) Copyright 2006 TOSHIBA CORPORATION
   5  *
   6  * This code is based on drivers/ide/pci/siimage.c:
   7  * Copyright (C) 2001-2002      Andre Hedrick <andre@linux-ide.org>
   8  * Copyright (C) 2003           Red Hat <alan@redhat.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include <linux/types.h>
  26 #include <linux/module.h>
  27 #include <linux/pci.h>
  28 #include <linux/delay.h>
  29 #include <linux/hdreg.h>
  30 #include <linux/ide.h>
  31 #include <linux/init.h>
  32
  33 #define PCI_DEVICE_ID_TOSHIBA_SCC_ATA            0x01b4
  34
  35 #define SCC_PATA_NAME           "scc IDE"
  36
  37 #define TDVHSEL_MASTER          0x00000001
  38 #define TDVHSEL_SLAVE           0x00000004
  39
  40 #define MODE_JCUSFEN            0x00000080
  41
  42 #define CCKCTRL_ATARESET        0x00040000
  43 #define CCKCTRL_BUFCNT          0x00020000
  44 #define CCKCTRL_CRST            0x00010000
  45 #define CCKCTRL_OCLKEN          0x00000100
  46 #define CCKCTRL_ATACLKOEN       0x00000002
  47 #define CCKCTRL_LCLKEN          0x00000001
  48
  49 #define QCHCD_IOS_SS            0x00000001
  50
  51 #define QCHSD_STPDIAG           0x00020000
  52
  53 #define INTMASK_MSK             0xD1000012
  54 #define INTSTS_SERROR           0x80000000
  55 #define INTSTS_PRERR            0x40000000
  56 #define INTSTS_RERR             0x10000000
  57 #define INTSTS_ICERR            0x01000000
  58 #define INTSTS_BMSINT           0x00000010
  59 #define INTSTS_BMHE             0x00000008
  60 #define INTSTS_IOIRQS           0x00000004
  61 #define INTSTS_INTRQ            0x00000002
  62 #define INTSTS_ACTEINT          0x00000001
  63
  64 #define ECMODE_VALUE 0x01
  65
  66 static struct scc_ports {
  67         unsigned long ctl, dma;
  68         ide_hwif_t *hwif;  /* for removing port from system */
  69 } scc_ports[MAX_HWIFS];
  70
  71 /* PIO transfer mode  table */
  72 /* JCHST */
  73 static unsigned long JCHSTtbl[2][7] = {
  74         {0x0E, 0x05, 0x02, 0x03, 0x02, 0x00, 0x00},   /* 100MHz */
  75         {0x13, 0x07, 0x04, 0x04, 0x03, 0x00, 0x00}    /* 133MHz */
  76 };
  77
  78 /* JCHHT */
  79 static unsigned long JCHHTtbl[2][7] = {
  80         {0x0E, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00},   /* 100MHz */
  81         {0x13, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00}    /* 133MHz */
  82 };
  83
  84 /* JCHCT */
  85 static unsigned long JCHCTtbl[2][7] = {
  86         {0x1D, 0x1D, 0x1C, 0x0B, 0x06, 0x00, 0x00},   /* 100MHz */
  87         {0x27, 0x26, 0x26, 0x0E, 0x09, 0x00, 0x00}    /* 133MHz */
  88 };
  89
  90
  91 /* DMA transfer mode  table */
  92 /* JCHDCTM/JCHDCTS */
  93 static unsigned long JCHDCTxtbl[2][7] = {
  94         {0x0A, 0x06, 0x04, 0x03, 0x01, 0x00, 0x00},   /* 100MHz */
  95         {0x0E, 0x09, 0x06, 0x04, 0x02, 0x01, 0x00}    /* 133MHz */
  96 };
  97
  98 /* JCSTWTM/JCSTWTS  */
  99 static unsigned long JCSTWTxtbl[2][7] = {
 100         {0x06, 0x04, 0x03, 0x02, 0x02, 0x02, 0x00},   /* 100MHz */
 101         {0x09, 0x06, 0x04, 0x02, 0x02, 0x02, 0x02}    /* 133MHz */
 102 };
 103
 104 /* JCTSS */
 105 static unsigned long JCTSStbl[2][7] = {
 106         {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x00},   /* 100MHz */
 107         {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05}    /* 133MHz */
 108 };
 109
 110 /* JCENVT */
 111 static unsigned long JCENVTtbl[2][7] = {
 112         {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00},   /* 100MHz */
 113         {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02}    /* 133MHz */
 114 };
 115
 116 /* JCACTSELS/JCACTSELM */
 117 static unsigned long JCACTSELtbl[2][7] = {
 118         {0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00},   /* 100MHz */
 119         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}    /* 133MHz */
 120 };
 121
 122
 123 static u8 scc_ide_inb(unsigned long port)
 124 {
 125         u32 data = in_be32((void*)port);
 126         return (u8)data;
 127 }
 128
 129 static u16 scc_ide_inw(unsigned long port)
 130 {
 131         u32 data = in_be32((void*)port);
 132         return (u16)data;
 133 }
 134
 135 static void scc_ide_insw(unsigned long port, void *addr, u32 count)
 136 {
 137         u16 *ptr = (u16 *)addr;
 138         while (count--) {
 139                 *ptr++ = le16_to_cpu(in_be32((void*)port));
 140         }
 141 }
 142
 143 static void scc_ide_insl(unsigned long port, void *addr, u32 count)
 144 {
 145         u16 *ptr = (u16 *)addr;
 146         while (count--) {
 147                 *ptr++ = le16_to_cpu(in_be32((void*)port));
 148                 *ptr++ = le16_to_cpu(in_be32((void*)port));
 149         }
 150 }
 151
 152 static void scc_ide_outb(u8 addr, unsigned long port)
 153 {
 154         out_be32((void*)port, addr);
 155 }
 156
 157 static void scc_ide_outw(u16 addr, unsigned long port)
 158 {
 159         out_be32((void*)port, addr);
 160 }
 161
 162 static void
 163 scc_ide_outbsync(ide_drive_t * drive, u8 addr, unsigned long port)
 164 {
 165         ide_hwif_t *hwif = HWIF(drive);
 166
 167         out_be32((void*)port, addr);
 168         eieio();
 169         in_be32((void*)(hwif->dma_base + 0x01c));
 170         eieio();
 171 }
 172
 173 static void
 174 scc_ide_outsw(unsigned long port, void *addr, u32 count)
 175 {
 176         u16 *ptr = (u16 *)addr;
 177         while (count--) {
 178                 out_be32((void*)port, cpu_to_le16(*ptr++));
 179         }
 180 }
 181
 182 static void
 183 scc_ide_outsl(unsigned long port, void *addr, u32 count)
 184 {
 185         u16 *ptr = (u16 *)addr;
 186         while (count--) {
 187                 out_be32((void*)port, cpu_to_le16(*ptr++));
 188                 out_be32((void*)port, cpu_to_le16(*ptr++));
 189         }
 190 }
 191
 192 /**
 193  *      scc_set_pio_mode        -       set host controller for PIO mode
 194  *      @drive: drive
 195  *      @pio: PIO mode number
 196  *
 197  *      Load the timing settings for this device mode into the
 198  *      controller.
 199  */
 200
 201 static void scc_set_pio_mode(ide_drive_t *drive, const u8 pio)
 202 {
 203         ide_hwif_t *hwif = HWIF(drive);
 204         struct scc_ports *ports = ide_get_hwifdata(hwif);
 205         unsigned long ctl_base = ports->ctl;
 206         unsigned long cckctrl_port = ctl_base + 0xff0;
 207         unsigned long piosht_port = ctl_base + 0x000;
 208         unsigned long pioct_port = ctl_base + 0x004;
 209         unsigned long reg;
 210         int offset;
 211
 212         reg = in_be32((void __iomem *)cckctrl_port);
 213         if (reg & CCKCTRL_ATACLKOEN) {
 214                 offset = 1; /* 133MHz */
 215         } else {
 216                 offset = 0; /* 100MHz */
 217         }
 218         reg = JCHSTtbl[offset][pio] << 16 | JCHHTtbl[offset][pio];
 219         out_be32((void __iomem *)piosht_port, reg);
 220         reg = JCHCTtbl[offset][pio];
 221         out_be32((void __iomem *)pioct_port, reg);
 222 }
 223
 224 /**
 225  *      scc_set_dma_mode        -       set host controller for DMA mode
 226  *      @drive: drive
 227  *      @speed: DMA mode
 228  *
 229  *      Load the timing settings for this device mode into the
 230  *      controller.
 231  */
 232
 233 static void scc_set_dma_mode(ide_drive_t *drive, const u8 speed)
 234 {
 235         ide_hwif_t *hwif = HWIF(drive);
 236         struct scc_ports *ports = ide_get_hwifdata(hwif);
 237         unsigned long ctl_base = ports->ctl;
 238         unsigned long cckctrl_port = ctl_base + 0xff0;
 239         unsigned long mdmact_port = ctl_base + 0x008;
 240         unsigned long mcrcst_port = ctl_base + 0x00c;
 241         unsigned long sdmact_port = ctl_base + 0x010;
 242         unsigned long scrcst_port = ctl_base + 0x014;
 243         unsigned long udenvt_port = ctl_base + 0x018;
 244         unsigned long tdvhsel_port   = ctl_base + 0x020;
 245         int is_slave = (&hwif->drives[1] == drive);
 246         int offset, idx;
 247         unsigned long reg;
 248         unsigned long jcactsel;
 249
 250         reg = in_be32((void __iomem *)cckctrl_port);
 251         if (reg & CCKCTRL_ATACLKOEN) {
 252                 offset = 1; /* 133MHz */
 253         } else {
 254                 offset = 0; /* 100MHz */
 255         }
 256
 257         idx = speed - XFER_UDMA_0;
 258
 259         jcactsel = JCACTSELtbl[offset][idx];
 260         if (is_slave) {
 261                 out_be32((void __iomem *)sdmact_port, JCHDCTxtbl[offset][idx]);
 262                 out_be32((void __iomem *)scrcst_port, JCSTWTxtbl[offset][idx]);
 263                 jcactsel = jcactsel << 2;
 264                 out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_SLAVE) | jcactsel);
 265         } else {
 266                 out_be32((void __iomem *)mdmact_port, JCHDCTxtbl[offset][idx]);
 267                 out_be32((void __iomem *)mcrcst_port, JCSTWTxtbl[offset][idx]);
 268                 out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_MASTER) | jcactsel);
 269         }
 270         reg = JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx];
 271         out_be32((void __iomem *)udenvt_port, reg);
 272 }
 273
 274 /**
 275  *      scc_ide_dma_setup       -       begin a DMA phase
 276  *      @drive: target device
 277  *
 278  *      Build an IDE DMA PRD (IDE speak for scatter gather table)
 279  *      and then set up the DMA transfer registers.
 280  *
 281  *      Returns 0 on success. If a PIO fallback is required then 1
 282  *      is returned.
 283  */
 284
 285 static int scc_dma_setup(ide_drive_t *drive)
 286 {
 287         ide_hwif_t *hwif = drive->hwif;
 288         struct request *rq = HWGROUP(drive)->rq;
 289         unsigned int reading;
 290         u8 dma_stat;
 291
 292         if (rq_data_dir(rq))
 293                 reading = 0;
 294         else
 295                 reading = 1 << 3;
 296
 297         /* fall back to pio! */
 298         if (!ide_build_dmatable(drive, rq)) {
 299                 ide_map_sg(drive, rq);
 300                 return 1;
 301         }
 302
 303         /* PRD table */
 304         out_be32((void __iomem *)hwif->dma_prdtable, hwif->dmatable_dma);
 305
 306         /* specify r/w */
 307         out_be32((void __iomem *)hwif->dma_command, reading);
 308
 309         /* read dma_status for INTR & ERROR flags */
 310         dma_stat = in_be32((void __iomem *)hwif->dma_status);
 311
 312         /* clear INTR & ERROR flags */
 313         out_be32((void __iomem *)hwif->dma_status, dma_stat|6);
 314         drive->waiting_for_dma = 1;
 315         return 0;
 316 }
 317
 318
 319 /**
 320  *      scc_dma_end     -       Stop DMA
 321  *      @drive: IDE drive
 322  *
 323  *      Check and clear INT Status register.
 324  *      Then call __ide_dma_end().
 325  */
 326
 327 static int scc_dma_end(ide_drive_t *drive)
 328 {
 329         ide_hwif_t *hwif = HWIF(drive);
 330         unsigned long intsts_port = hwif->dma_base + 0x014;
 331         u32 reg;
 332         int dma_stat, data_loss = 0;
 333         static int retry = 0;
 334
 335         /* errata A308 workaround: Step5 (check data loss) */
 336         /* We don't check non ide_disk because it is limited to UDMA4 */
 337         if (!(in_be32((void __iomem *)hwif->io_ports.ctl_addr)
 338               & ERR_STAT) &&
 339             drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) {
 340                 reg = in_be32((void __iomem *)intsts_port);
 341                 if (!(reg & INTSTS_ACTEINT)) {
 342                         printk(KERN_WARNING "%s: operation failed (transfer data loss)\n",
 343                                drive->name);
 344                         data_loss = 1;
 345                         if (retry++) {
 346                                 struct request *rq = HWGROUP(drive)->rq;
 347                                 int unit;
 348                                 /* ERROR_RESET and drive->crc_count are needed
 349                                  * to reduce DMA transfer mode in retry process.
 350                                  */
 351                                 if (rq)
 352                                         rq->errors |= ERROR_RESET;
 353                                 for (unit = 0; unit < MAX_DRIVES; unit++) {
 354                                         ide_drive_t *drive = &hwif->drives[unit];
 355                                         drive->crc_count++;
 356                                 }
 357                         }
 358                 }
 359         }
 360
 361         while (1) {
 362                 reg = in_be32((void __iomem *)intsts_port);
 363
 364                 if (reg & INTSTS_SERROR) {
 365                         printk(KERN_WARNING "%s: SERROR\n", SCC_PATA_NAME);
 366                         out_be32((void __iomem *)intsts_port, INTSTS_SERROR|INTSTS_BMSINT);
 367
 368                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
 369                         continue;
 370                 }
 371
 372                 if (reg & INTSTS_PRERR) {
 373                         u32 maea0, maec0;
 374                         unsigned long ctl_base = hwif->config_data;
 375
 376                         maea0 = in_be32((void __iomem *)(ctl_base + 0xF50));
 377                         maec0 = in_be32((void __iomem *)(ctl_base + 0xF54));
 378
 379                         printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]\n", SCC_PATA_NAME, maea0, maec0);
 380
 381                         out_be32((void __iomem *)intsts_port, INTSTS_PRERR|INTSTS_BMSINT);
 382
 383                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
 384                         continue;
 385                 }
 386
 387                 if (reg & INTSTS_RERR) {
 388                         printk(KERN_WARNING "%s: Response Error\n", SCC_PATA_NAME);
 389                         out_be32((void __iomem *)intsts_port, INTSTS_RERR|INTSTS_BMSINT);
 390
 391                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
 392                         continue;
 393                 }
 394
 395                 if (reg & INTSTS_ICERR) {
 396                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
 397
 398                         printk(KERN_WARNING "%s: Illegal Configuration\n", SCC_PATA_NAME);
 399                         out_be32((void __iomem *)intsts_port, INTSTS_ICERR|INTSTS_BMSINT);
 400                         continue;
 401                 }
 402
 403                 if (reg & INTSTS_BMSINT) {
 404                         printk(KERN_WARNING "%s: Internal Bus Error\n", SCC_PATA_NAME);
 405                         out_be32((void __iomem *)intsts_port, INTSTS_BMSINT);
 406
 407                         ide_do_reset(drive);
 408                         continue;
 409                 }
 410
 411                 if (reg & INTSTS_BMHE) {
 412                         out_be32((void __iomem *)intsts_port, INTSTS_BMHE);
 413                         continue;
 414                 }
 415
 416                 if (reg & INTSTS_ACTEINT) {
 417                         out_be32((void __iomem *)intsts_port, INTSTS_ACTEINT);
 418                         continue;
 419                 }
 420
 421                 if (reg & INTSTS_IOIRQS) {
 422                         out_be32((void __iomem *)intsts_port, INTSTS_IOIRQS);
 423                         continue;
 424                 }
 425                 break;
 426         }
 427
 428         dma_stat = __ide_dma_end(drive);
 429         if (data_loss)
 430                 dma_stat |= 2; /* emulate DMA error (to retry command) */
 431         return dma_stat;
 432 }
 433
 434 /* returns 1 if dma irq issued, 0 otherwise */
 435 static int scc_dma_test_irq(ide_drive_t *drive)
 436 {
 437         ide_hwif_t *hwif = HWIF(drive);
 438         u32 int_stat = in_be32((void __iomem *)hwif->dma_base + 0x014);
 439
 440         /* SCC errata A252,A308 workaround: Step4 */
 441         if ((in_be32((void __iomem *)hwif->io_ports.ctl_addr)
 442              & ERR_STAT) &&
 443             (int_stat & INTSTS_INTRQ))
 444                 return 1;
 445
 446         /* SCC errata A308 workaround: Step5 (polling IOIRQS) */
 447         if (int_stat & INTSTS_IOIRQS)
 448                 return 1;
 449
 450         if (!drive->waiting_for_dma)
 451                 printk(KERN_WARNING "%s: (%s) called while not waiting\n",
 452                         drive->name, __func__);
 453         return 0;
 454 }
 455
 456 static u8 scc_udma_filter(ide_drive_t *drive)
 457 {
 458         ide_hwif_t *hwif = drive->hwif;
 459         u8 mask = hwif->ultra_mask;
 460
 461         /* errata A308 workaround: limit non ide_disk drive to UDMA4 */
 462         if ((drive->media != ide_disk) && (mask & 0xE0)) {
 463                 printk(KERN_INFO "%s: limit %s to UDMA4\n",
 464                        SCC_PATA_NAME, drive->name);
 465                 mask = ATA_UDMA4;
 466         }
 467
 468         return mask;
 469 }
 470
 471 /**
 472  *      setup_mmio_scc  -       map CTRL/BMID region
 473  *      @dev: PCI device we are configuring
 474  *      @name: device name
 475  *
 476  */
 477
 478 static int setup_mmio_scc (struct pci_dev *dev, const char *name)
 479 {
 480         unsigned long ctl_base = pci_resource_start(dev, 0);
 481         unsigned long dma_base = pci_resource_start(dev, 1);
 482         unsigned long ctl_size = pci_resource_len(dev, 0);
 483         unsigned long dma_size = pci_resource_len(dev, 1);
 484         void __iomem *ctl_addr;
 485         void __iomem *dma_addr;
 486         int i, ret;
 487
 488         for (i = 0; i < MAX_HWIFS; i++) {
 489                 if (scc_ports[i].ctl == 0)
 490                         break;
 491         }
 492         if (i >= MAX_HWIFS)
 493                 return -ENOMEM;
 494
 495         ret = pci_request_selected_regions(dev, (1 << 2) - 1, name);
 496         if (ret < 0) {
 497                 printk(KERN_ERR "%s: can't reserve resources\n", name);
 498                 return ret;
 499         }
 500
 501         if ((ctl_addr = ioremap(ctl_base, ctl_size)) == NULL)
 502                 goto fail_0;
 503
 504         if ((dma_addr = ioremap(dma_base, dma_size)) == NULL)
 505                 goto fail_1;
 506
 507         pci_set_master(dev);
 508         scc_ports[i].ctl = (unsigned long)ctl_addr;
 509         scc_ports[i].dma = (unsigned long)dma_addr;
 510         pci_set_drvdata(dev, (void *) &scc_ports[i]);
 511
 512         return 1;
 513
 514  fail_1:
 515         iounmap(ctl_addr);
 516  fail_0:
 517         return -ENOMEM;
 518 }
 519
 520 static int scc_ide_setup_pci_device(struct pci_dev *dev,
 521                                     const struct ide_port_info *d)
 522 {
 523         struct scc_ports *ports = pci_get_drvdata(dev);
 524         ide_hwif_t *hwif = NULL;
 525         hw_regs_t hw;
 526         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 527         int i;
 528
 529         hwif = ide_find_port();
 530         if (hwif == NULL) {
 531                 printk(KERN_ERR "%s: too many IDE interfaces, "
 532                                 "no room in table\n", SCC_PATA_NAME);
 533                 return -ENOMEM;
 534         }
 535
 536         memset(&hw, 0, sizeof(hw));
 537         for (i = 0; i <= 8; i++)
 538                 hw.io_ports_array[i] = ports->dma + 0x20 + i * 4;
 539         hw.irq = dev->irq;
 540         hw.dev = &dev->dev;
 541         hw.chipset = ide_pci;
 542         ide_init_port_hw(hwif, &hw);
 543         hwif->dev = &dev->dev;
 544
 545         idx[0] = hwif->index;
 546
 547         ide_device_add(idx, d);
 548
 549         return 0;
 550 }
 551
 552 /**
 553  *      init_setup_scc  -       set up an SCC PATA Controller
 554  *      @dev: PCI device
 555  *      @d: IDE port info
 556  *
 557  *      Perform the initial set up for this device.
 558  */
 559
 560 static int __devinit init_setup_scc(struct pci_dev *dev,
 561                                     const struct ide_port_info *d)
 562 {
 563         unsigned long ctl_base;
 564         unsigned long dma_base;
 565         unsigned long cckctrl_port;
 566         unsigned long intmask_port;
 567         unsigned long mode_port;
 568         unsigned long ecmode_port;
 569         unsigned long dma_status_port;
 570         u32 reg = 0;
 571         struct scc_ports *ports;
 572         int rc;
 573
 574         rc = pci_enable_device(dev);
 575         if (rc)
 576                 goto end;
 577
 578         rc = setup_mmio_scc(dev, d->name);
 579         if (rc < 0)
 580                 goto end;
 581
 582         ports = pci_get_drvdata(dev);
 583         ctl_base = ports->ctl;
 584         dma_base = ports->dma;
 585         cckctrl_port = ctl_base + 0xff0;
 586         intmask_port = dma_base + 0x010;
 587         mode_port = ctl_base + 0x024;
 588         ecmode_port = ctl_base + 0xf00;
 589         dma_status_port = dma_base + 0x004;
 590
 591         /* controller initialization */
 592         reg = 0;
 593         out_be32((void*)cckctrl_port, reg);
 594         reg |= CCKCTRL_ATACLKOEN;
 595         out_be32((void*)cckctrl_port, reg);
 596         reg |= CCKCTRL_LCLKEN | CCKCTRL_OCLKEN;
 597         out_be32((void*)cckctrl_port, reg);
 598         reg |= CCKCTRL_CRST;
 599         out_be32((void*)cckctrl_port, reg);
 600
 601         for (;;) {
 602                 reg = in_be32((void*)cckctrl_port);
 603                 if (reg & CCKCTRL_CRST)
 604                         break;
 605                 udelay(5000);
 606         }
 607
 608         reg |= CCKCTRL_ATARESET;
 609         out_be32((void*)cckctrl_port, reg);
 610
 611         out_be32((void*)ecmode_port, ECMODE_VALUE);
 612         out_be32((void*)mode_port, MODE_JCUSFEN);
 613         out_be32((void*)intmask_port, INTMASK_MSK);
 614
 615         rc = scc_ide_setup_pci_device(dev, d);
 616
 617  end:
 618         return rc;
 619 }
 620
 621 /**
 622  *      init_mmio_iops_scc      -       set up the iops for MMIO
 623  *      @hwif: interface to set up
 624  *
 625  */
 626
 627 static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif)
 628 {
 629         struct pci_dev *dev = to_pci_dev(hwif->dev);
 630         struct scc_ports *ports = pci_get_drvdata(dev);
 631         unsigned long dma_base = ports->dma;
 632
 633         ide_set_hwifdata(hwif, ports);
 634
 635         hwif->INB = scc_ide_inb;
 636         hwif->INW = scc_ide_inw;
 637         hwif->INSW = scc_ide_insw;
 638         hwif->INSL = scc_ide_insl;
 639         hwif->OUTB = scc_ide_outb;
 640         hwif->OUTBSYNC = scc_ide_outbsync;
 641         hwif->OUTW = scc_ide_outw;
 642         hwif->OUTSW = scc_ide_outsw;
 643         hwif->OUTSL = scc_ide_outsl;
 644
 645         hwif->dma_base = dma_base;
 646         hwif->config_data = ports->ctl;
 647         hwif->mmio = 1;
 648 }
 649
 650 /**
 651  *      init_iops_scc   -       set up iops
 652  *      @hwif: interface to set up
 653  *
 654  *      Do the basic setup for the SCC hardware interface
 655  *      and then do the MMIO setup.
 656  */
 657
 658 static void __devinit init_iops_scc(ide_hwif_t *hwif)
 659 {
 660         struct pci_dev *dev = to_pci_dev(hwif->dev);
 661
 662         hwif->hwif_data = NULL;
 663         if (pci_get_drvdata(dev) == NULL)
 664                 return;
 665         init_mmio_iops_scc(hwif);
 666 }
 667
 668 static u8 __devinit scc_cable_detect(ide_hwif_t *hwif)
 669 {
 670         return ATA_CBL_PATA80;
 671 }
 672
 673 /**
 674  *      init_hwif_scc   -       set up hwif
 675  *      @hwif: interface to set up
 676  *
 677  *      We do the basic set up of the interface structure. The SCC
 678  *      requires several custom handlers so we override the default
 679  *      ide DMA handlers appropriately.
 680  */
 681
 682 static void __devinit init_hwif_scc(ide_hwif_t *hwif)
 683 {
 684         struct scc_ports *ports = ide_get_hwifdata(hwif);
 685
 686         ports->hwif = hwif;
 687
 688         hwif->dma_command = hwif->dma_base;
 689         hwif->dma_status = hwif->dma_base + 0x04;
 690         hwif->dma_prdtable = hwif->dma_base + 0x08;
 691
 692         /* PTERADD */
 693         out_be32((void __iomem *)(hwif->dma_base + 0x018), hwif->dmatable_dma);
 694
 695         if (in_be32((void __iomem *)(hwif->config_data + 0xff0)) & CCKCTRL_ATACLKOEN)
 696                 hwif->ultra_mask = ATA_UDMA6; /* 133MHz */
 697         else
 698                 hwif->ultra_mask = ATA_UDMA5; /* 100MHz */
 699 }
 700
 701 static const struct ide_port_ops scc_port_ops = {
 702         .set_pio_mode           = scc_set_pio_mode,
 703         .set_dma_mode           = scc_set_dma_mode,
 704         .udma_filter            = scc_udma_filter,
 705         .cable_detect           = scc_cable_detect,
 706 };
 707
 708 static const struct ide_dma_ops scc_dma_ops = {
 709         .dma_host_set           = ide_dma_host_set,
 710         .dma_setup              = scc_dma_setup,
 711         .dma_exec_cmd           = ide_dma_exec_cmd,
 712         .dma_start              = ide_dma_start,
 713         .dma_end                = scc_dma_end,
 714         .dma_test_irq           = scc_dma_test_irq,
 715         .dma_lost_irq           = ide_dma_lost_irq,
 716         .dma_timeout            = ide_dma_timeout,
 717 };
 718
 719 #define DECLARE_SCC_DEV(name_str)                       \
 720   {                                                     \
 721       .name             = name_str,                     \
 722       .init_iops        = init_iops_scc,                \
 723       .init_hwif        = init_hwif_scc,                \
 724       .port_ops         = &scc_port_ops,                \
 725       .dma_ops          = &scc_dma_ops,                 \
 726       .host_flags       = IDE_HFLAG_SINGLE,             \
 727       .pio_mask         = ATA_PIO4,                     \
 728   }
 729
 730 static const struct ide_port_info scc_chipsets[] __devinitdata = {
 731         /* 0 */ DECLARE_SCC_DEV("sccIDE"),
 732 };
 733
 734 /**
 735  *      scc_init_one    -       pci layer discovery entry
 736  *      @dev: PCI device
 737  *      @id: ident table entry
 738  *
 739  *      Called by the PCI code when it finds an SCC PATA controller.
 740  *      We then use the IDE PCI generic helper to do most of the work.
 741  */
 742
 743 static int __devinit scc_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 744 {
 745         return init_setup_scc(dev, &scc_chipsets[id->driver_data]);
 746 }
 747
 748 /**
 749  *      scc_remove      -       pci layer remove entry
 750  *      @dev: PCI device
 751  *
 752  *      Called by the PCI code when it removes an SCC PATA controller.
 753  */
 754
 755 static void __devexit scc_remove(struct pci_dev *dev)
 756 {
 757         struct scc_ports *ports = pci_get_drvdata(dev);
 758         ide_hwif_t *hwif = ports->hwif;
 759
 760         if (hwif->dmatable_cpu) {
 761                 pci_free_consistent(dev, PRD_ENTRIES * PRD_BYTES,
 762                                     hwif->dmatable_cpu, hwif->dmatable_dma);
 763                 hwif->dmatable_cpu = NULL;
 764         }
 765
 766         ide_unregister(hwif);
 767
 768         iounmap((void*)ports->dma);
 769         iounmap((void*)ports->ctl);
 770         pci_release_selected_regions(dev, (1 << 2) - 1);
 771         memset(ports, 0, sizeof(*ports));
 772 }
 773
 774 static const struct pci_device_id scc_pci_tbl[] = {
 775         { PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA), 0 },
 776         { 0, },
 777 };
 778 MODULE_DEVICE_TABLE(pci, scc_pci_tbl);
 779
 780 static struct pci_driver driver = {
 781         .name = "SCC IDE",
 782         .id_table = scc_pci_tbl,
 783         .probe = scc_init_one,
 784         .remove = scc_remove,
 785 };
 786
 787 static int scc_ide_init(void)
 788 {
 789         return ide_pci_register_driver(&driver);
 790 }
 791
 792 module_init(scc_ide_init);
 793 /* -- No exit code?
 794 static void scc_ide_exit(void)
 795 {
 796         ide_pci_unregister_driver(&driver);
 797 }
 798 module_exit(scc_ide_exit);
 799  */
 800
 801
 802 MODULE_DESCRIPTION("PCI driver module for Toshiba SCC IDE");
 803 MODULE_LICENSE("GPL");