drivers/ata/sata_promise.c

   1 /*
   2  *  sata_promise.c - Promise SATA
   3  *
   4  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
   5  *                  Please ALWAYS copy linux-ide@vger.kernel.org
   6  *                  on emails.
   7  *
   8  *  Copyright 2003-2004 Red Hat, Inc.
   9  *
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2, or (at your option)
  14  *  any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; see the file COPYING.  If not, write to
  23  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  *
  26  *  libata documentation is available via 'make {ps|pdf}docs',
  27  *  as Documentation/DocBook/libata.*
  28  *
  29  *  Hardware information only available under NDA.
  30  *
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/pci.h>
  36 #include <linux/init.h>
  37 #include <linux/blkdev.h>
  38 #include <linux/delay.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/sched.h>
  41 #include <linux/device.h>
  42 #include <scsi/scsi_host.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <linux/libata.h>
  45 #include <asm/io.h>
  46 #include "sata_promise.h"
  47
  48 #define DRV_NAME        "sata_promise"
  49 #define DRV_VERSION     "1.05"
  50
  51
  52 enum {
  53         PDC_PKT_SUBMIT          = 0x40, /* Command packet pointer addr */
  54         PDC_INT_SEQMASK         = 0x40, /* Mask of asserted SEQ INTs */
  55         PDC_FLASH_CTL           = 0x44, /* Flash control register */
  56         PDC_GLOBAL_CTL          = 0x48, /* Global control/status (per port) */
  57         PDC_CTLSTAT             = 0x60, /* IDE control and status (per port) */
  58         PDC_SATA_PLUG_CSR       = 0x6C, /* SATA Plug control/status reg */
  59         PDC2_SATA_PLUG_CSR      = 0x60, /* SATAII Plug control/status reg */
  60         PDC_TBG_MODE            = 0x41C, /* TBG mode (not SATAII) */
  61         PDC_SLEW_CTL            = 0x470, /* slew rate control reg (not SATAII) */
  62
  63         PDC_ERR_MASK            = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
  64                                   (1<<8) | (1<<9) | (1<<10),
  65
  66         board_2037x             = 0,    /* FastTrak S150 TX2plus */
  67         board_20319             = 1,    /* FastTrak S150 TX4 */
  68         board_20619             = 2,    /* FastTrak TX4000 */
  69         board_20771             = 3,    /* FastTrak TX2300 */
  70         board_2057x             = 4,    /* SATAII150 Tx2plus */
  71         board_40518             = 5,    /* SATAII150 Tx4 */
  72
  73         PDC_HAS_PATA            = (1 << 1), /* PDC20375/20575 has PATA */
  74
  75         PDC_RESET               = (1 << 11), /* HDMA reset */
  76
  77         PDC_COMMON_FLAGS        = ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST |
  78                                   ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI |
  79                                   ATA_FLAG_PIO_POLLING,
  80
  81         /* hp->flags bits */
  82         PDC_FLAG_GEN_II         = (1 << 0),
  83 };
  84
  85
  86 struct pdc_port_priv {
  87         u8                      *pkt;
  88         dma_addr_t              pkt_dma;
  89 };
  90
  91 struct pdc_host_priv {
  92         unsigned long           flags;
  93         int                     hotplug_offset;
  94 };
  95
  96 static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
  97 static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
  98 static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
  99 static irqreturn_t pdc_interrupt (int irq, void *dev_instance);
 100 static void pdc_eng_timeout(struct ata_port *ap);
 101 static int pdc_port_start(struct ata_port *ap);
 102 static void pdc_port_stop(struct ata_port *ap);
 103 static void pdc_pata_phy_reset(struct ata_port *ap);
 104 static void pdc_sata_phy_reset(struct ata_port *ap);
 105 static void pdc_qc_prep(struct ata_queued_cmd *qc);
 106 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 107 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 108 static void pdc_irq_clear(struct ata_port *ap);
 109 static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc);
 110 static void pdc_host_stop(struct ata_host *host);
 111
 112
 113 static struct scsi_host_template pdc_ata_sht = {
 114         .module                 = THIS_MODULE,
 115         .name                   = DRV_NAME,
 116         .ioctl                  = ata_scsi_ioctl,
 117         .queuecommand           = ata_scsi_queuecmd,
 118         .can_queue              = ATA_DEF_QUEUE,
 119         .this_id                = ATA_SHT_THIS_ID,
 120         .sg_tablesize           = LIBATA_MAX_PRD,
 121         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 122         .emulated               = ATA_SHT_EMULATED,
 123         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 124         .proc_name              = DRV_NAME,
 125         .dma_boundary           = ATA_DMA_BOUNDARY,
 126         .slave_configure        = ata_scsi_slave_config,
 127         .slave_destroy          = ata_scsi_slave_destroy,
 128         .bios_param             = ata_std_bios_param,
 129 };
 130
 131 static const struct ata_port_operations pdc_sata_ops = {
 132         .port_disable           = ata_port_disable,
 133         .tf_load                = pdc_tf_load_mmio,
 134         .tf_read                = ata_tf_read,
 135         .check_status           = ata_check_status,
 136         .exec_command           = pdc_exec_command_mmio,
 137         .dev_select             = ata_std_dev_select,
 138
 139         .phy_reset              = pdc_sata_phy_reset,
 140
 141         .qc_prep                = pdc_qc_prep,
 142         .qc_issue               = pdc_qc_issue_prot,
 143         .eng_timeout            = pdc_eng_timeout,
 144         .data_xfer              = ata_mmio_data_xfer,
 145         .irq_handler            = pdc_interrupt,
 146         .irq_clear              = pdc_irq_clear,
 147
 148         .scr_read               = pdc_sata_scr_read,
 149         .scr_write              = pdc_sata_scr_write,
 150         .port_start             = pdc_port_start,
 151         .port_stop              = pdc_port_stop,
 152         .host_stop              = pdc_host_stop,
 153 };
 154
 155 static const struct ata_port_operations pdc_pata_ops = {
 156         .port_disable           = ata_port_disable,
 157         .tf_load                = pdc_tf_load_mmio,
 158         .tf_read                = ata_tf_read,
 159         .check_status           = ata_check_status,
 160         .exec_command           = pdc_exec_command_mmio,
 161         .dev_select             = ata_std_dev_select,
 162
 163         .phy_reset              = pdc_pata_phy_reset,
 164
 165         .qc_prep                = pdc_qc_prep,
 166         .qc_issue               = pdc_qc_issue_prot,
 167         .data_xfer              = ata_mmio_data_xfer,
 168         .eng_timeout            = pdc_eng_timeout,
 169         .irq_handler            = pdc_interrupt,
 170         .irq_clear              = pdc_irq_clear,
 171
 172         .port_start             = pdc_port_start,
 173         .port_stop              = pdc_port_stop,
 174         .host_stop              = pdc_host_stop,
 175 };
 176
 177 static const struct ata_port_info pdc_port_info[] = {
 178         /* board_2037x */
 179         {
 180                 .sht            = &pdc_ata_sht,
 181                 .flags          = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
 182                 .pio_mask       = 0x1f, /* pio0-4 */
 183                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 184                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 185                 .port_ops       = &pdc_sata_ops,
 186         },
 187
 188         /* board_20319 */
 189         {
 190                 .sht            = &pdc_ata_sht,
 191                 .flags          = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
 192                 .pio_mask       = 0x1f, /* pio0-4 */
 193                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 194                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 195                 .port_ops       = &pdc_sata_ops,
 196         },
 197
 198         /* board_20619 */
 199         {
 200                 .sht            = &pdc_ata_sht,
 201                 .flags          = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
 202                 .pio_mask       = 0x1f, /* pio0-4 */
 203                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 204                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 205                 .port_ops       = &pdc_pata_ops,
 206         },
 207
 208         /* board_20771 */
 209         {
 210                 .sht            = &pdc_ata_sht,
 211                 .flags          = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
 212                 .pio_mask       = 0x1f, /* pio0-4 */
 213                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 214                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 215                 .port_ops       = &pdc_sata_ops,
 216         },
 217
 218         /* board_2057x */
 219         {
 220                 .sht            = &pdc_ata_sht,
 221                 .flags          = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
 222                 .pio_mask       = 0x1f, /* pio0-4 */
 223                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 224                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 225                 .port_ops       = &pdc_sata_ops,
 226         },
 227
 228         /* board_40518 */
 229         {
 230                 .sht            = &pdc_ata_sht,
 231                 .flags          = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
 232                 .pio_mask       = 0x1f, /* pio0-4 */
 233                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 234                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 235                 .port_ops       = &pdc_sata_ops,
 236         },
 237 };
 238
 239 static const struct pci_device_id pdc_ata_pci_tbl[] = {
 240         { PCI_VDEVICE(PROMISE, 0x3371), board_2037x },
 241         { PCI_VDEVICE(PROMISE, 0x3373), board_2037x },
 242         { PCI_VDEVICE(PROMISE, 0x3375), board_2037x },
 243         { PCI_VDEVICE(PROMISE, 0x3376), board_2037x },
 244         { PCI_VDEVICE(PROMISE, 0x3570), board_2057x },
 245         { PCI_VDEVICE(PROMISE, 0x3571), board_2057x },
 246         { PCI_VDEVICE(PROMISE, 0x3574), board_2057x },
 247         { PCI_VDEVICE(PROMISE, 0x3d73), board_2057x },
 248         { PCI_VDEVICE(PROMISE, 0x3d75), board_2057x },
 249
 250         { PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
 251         { PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
 252         { PCI_VDEVICE(PROMISE, 0x3515), board_20319 },
 253         { PCI_VDEVICE(PROMISE, 0x3519), board_20319 },
 254         { PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
 255         { PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
 256
 257         { PCI_VDEVICE(PROMISE, 0x6629), board_20619 },
 258
 259 /* TODO: remove all associated board_20771 code, as it completely
 260  * duplicates board_2037x code, unless reason for separation can be
 261  * divined.
 262  */
 263 #if 0
 264         { PCI_VDEVICE(PROMISE, 0x3570), board_20771 },
 265 #endif
 266         { PCI_VDEVICE(PROMISE, 0x3577), board_20771 },
 267
 268         { }     /* terminate list */
 269 };
 270
 271
 272 static struct pci_driver pdc_ata_pci_driver = {
 273         .name                   = DRV_NAME,
 274         .id_table               = pdc_ata_pci_tbl,
 275         .probe                  = pdc_ata_init_one,
 276         .remove                 = ata_pci_remove_one,
 277 };
 278
 279
 280 static int pdc_port_start(struct ata_port *ap)
 281 {
 282         struct device *dev = ap->host->dev;
 283         struct pdc_port_priv *pp;
 284         int rc;
 285
 286         rc = ata_port_start(ap);
 287         if (rc)
 288                 return rc;
 289
 290         pp = kzalloc(sizeof(*pp), GFP_KERNEL);
 291         if (!pp) {
 292                 rc = -ENOMEM;
 293                 goto err_out;
 294         }
 295
 296         pp->pkt = dma_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
 297         if (!pp->pkt) {
 298                 rc = -ENOMEM;
 299                 goto err_out_kfree;
 300         }
 301
 302         ap->private_data = pp;
 303
 304         return 0;
 305
 306 err_out_kfree:
 307         kfree(pp);
 308 err_out:
 309         ata_port_stop(ap);
 310         return rc;
 311 }
 312
 313
 314 static void pdc_port_stop(struct ata_port *ap)
 315 {
 316         struct device *dev = ap->host->dev;
 317         struct pdc_port_priv *pp = ap->private_data;
 318
 319         ap->private_data = NULL;
 320         dma_free_coherent(dev, 128, pp->pkt, pp->pkt_dma);
 321         kfree(pp);
 322         ata_port_stop(ap);
 323 }
 324
 325
 326 static void pdc_host_stop(struct ata_host *host)
 327 {
 328         struct pdc_host_priv *hp = host->private_data;
 329
 330         ata_pci_host_stop(host);
 331
 332         kfree(hp);
 333 }
 334
 335
 336 static void pdc_reset_port(struct ata_port *ap)
 337 {
 338         void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_CTLSTAT;
 339         unsigned int i;
 340         u32 tmp;
 341
 342         for (i = 11; i > 0; i--) {
 343                 tmp = readl(mmio);
 344                 if (tmp & PDC_RESET)
 345                         break;
 346
 347                 udelay(100);
 348
 349                 tmp |= PDC_RESET;
 350                 writel(tmp, mmio);
 351         }
 352
 353         tmp &= ~PDC_RESET;
 354         writel(tmp, mmio);
 355         readl(mmio);    /* flush */
 356 }
 357
 358 static void pdc_sata_phy_reset(struct ata_port *ap)
 359 {
 360         pdc_reset_port(ap);
 361         sata_phy_reset(ap);
 362 }
 363
 364 static void pdc_pata_cbl_detect(struct ata_port *ap)
 365 {
 366         u8 tmp;
 367         void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_CTLSTAT + 0x03;
 368
 369         tmp = readb(mmio);
 370
 371         if (tmp & 0x01) {
 372                 ap->cbl = ATA_CBL_PATA40;
 373                 ap->udma_mask &= ATA_UDMA_MASK_40C;
 374         } else
 375                 ap->cbl = ATA_CBL_PATA80;
 376 }
 377
 378 static void pdc_pata_phy_reset(struct ata_port *ap)
 379 {
 380         pdc_pata_cbl_detect(ap);
 381         pdc_reset_port(ap);
 382         ata_port_probe(ap);
 383         ata_bus_reset(ap);
 384 }
 385
 386 static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
 387 {
 388         if (sc_reg > SCR_CONTROL)
 389                 return 0xffffffffU;
 390         return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
 391 }
 392
 393
 394 static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
 395                                u32 val)
 396 {
 397         if (sc_reg > SCR_CONTROL)
 398                 return;
 399         writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
 400 }
 401
 402 static void pdc_qc_prep(struct ata_queued_cmd *qc)
 403 {
 404         struct pdc_port_priv *pp = qc->ap->private_data;
 405         unsigned int i;
 406
 407         VPRINTK("ENTER\n");
 408
 409         switch (qc->tf.protocol) {
 410         case ATA_PROT_DMA:
 411                 ata_qc_prep(qc);
 412                 /* fall through */
 413
 414         case ATA_PROT_NODATA:
 415                 i = pdc_pkt_header(&qc->tf, qc->ap->prd_dma,
 416                                    qc->dev->devno, pp->pkt);
 417
 418                 if (qc->tf.flags & ATA_TFLAG_LBA48)
 419                         i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
 420                 else
 421                         i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
 422
 423                 pdc_pkt_footer(&qc->tf, pp->pkt, i);
 424                 break;
 425
 426         default:
 427                 break;
 428         }
 429 }
 430
 431 static void pdc_eng_timeout(struct ata_port *ap)
 432 {
 433         struct ata_host *host = ap->host;
 434         u8 drv_stat;
 435         struct ata_queued_cmd *qc;
 436         unsigned long flags;
 437
 438         DPRINTK("ENTER\n");
 439
 440         spin_lock_irqsave(&host->lock, flags);
 441
 442         qc = ata_qc_from_tag(ap, ap->active_tag);
 443
 444         switch (qc->tf.protocol) {
 445         case ATA_PROT_DMA:
 446         case ATA_PROT_NODATA:
 447                 ata_port_printk(ap, KERN_ERR, "command timeout\n");
 448                 drv_stat = ata_wait_idle(ap);
 449                 qc->err_mask |= __ac_err_mask(drv_stat);
 450                 break;
 451
 452         default:
 453                 drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 454
 455                 ata_port_printk(ap, KERN_ERR,
 456                                 "unknown timeout, cmd 0x%x stat 0x%x\n",
 457                                 qc->tf.command, drv_stat);
 458
 459                 qc->err_mask |= ac_err_mask(drv_stat);
 460                 break;
 461         }
 462
 463         spin_unlock_irqrestore(&host->lock, flags);
 464         ata_eh_qc_complete(qc);
 465         DPRINTK("EXIT\n");
 466 }
 467
 468 static inline unsigned int pdc_host_intr( struct ata_port *ap,
 469                                           struct ata_queued_cmd *qc)
 470 {
 471         unsigned int handled = 0;
 472         u32 tmp;
 473         void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_GLOBAL_CTL;
 474
 475         tmp = readl(mmio);
 476         if (tmp & PDC_ERR_MASK) {
 477                 qc->err_mask |= AC_ERR_DEV;
 478                 pdc_reset_port(ap);
 479         }
 480
 481         switch (qc->tf.protocol) {
 482         case ATA_PROT_DMA:
 483         case ATA_PROT_NODATA:
 484                 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
 485                 ata_qc_complete(qc);
 486                 handled = 1;
 487                 break;
 488
 489         default:
 490                 ap->stats.idle_irq++;
 491                 break;
 492         }
 493
 494         return handled;
 495 }
 496
 497 static void pdc_irq_clear(struct ata_port *ap)
 498 {
 499         struct ata_host *host = ap->host;
 500         void __iomem *mmio = host->mmio_base;
 501
 502         readl(mmio + PDC_INT_SEQMASK);
 503 }
 504
 505 static irqreturn_t pdc_interrupt (int irq, void *dev_instance)
 506 {
 507         struct ata_host *host = dev_instance;
 508         struct ata_port *ap;
 509         u32 mask = 0;
 510         unsigned int i, tmp;
 511         unsigned int handled = 0;
 512         void __iomem *mmio_base;
 513
 514         VPRINTK("ENTER\n");
 515
 516         if (!host || !host->mmio_base) {
 517                 VPRINTK("QUICK EXIT\n");
 518                 return IRQ_NONE;
 519         }
 520
 521         mmio_base = host->mmio_base;
 522
 523         /* reading should also clear interrupts */
 524         mask = readl(mmio_base + PDC_INT_SEQMASK);
 525
 526         if (mask == 0xffffffff) {
 527                 VPRINTK("QUICK EXIT 2\n");
 528                 return IRQ_NONE;
 529         }
 530
 531         spin_lock(&host->lock);
 532
 533         mask &= 0xffff;         /* only 16 tags possible */
 534         if (!mask) {
 535                 VPRINTK("QUICK EXIT 3\n");
 536                 goto done_irq;
 537         }
 538
 539         writel(mask, mmio_base + PDC_INT_SEQMASK);
 540
 541         for (i = 0; i < host->n_ports; i++) {
 542                 VPRINTK("port %u\n", i);
 543                 ap = host->ports[i];
 544                 tmp = mask & (1 << (i + 1));
 545                 if (tmp && ap &&
 546                     !(ap->flags & ATA_FLAG_DISABLED)) {
 547                         struct ata_queued_cmd *qc;
 548
 549                         qc = ata_qc_from_tag(ap, ap->active_tag);
 550                         if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
 551                                 handled += pdc_host_intr(ap, qc);
 552                 }
 553         }
 554
 555         VPRINTK("EXIT\n");
 556
 557 done_irq:
 558         spin_unlock(&host->lock);
 559         return IRQ_RETVAL(handled);
 560 }
 561
 562 static inline void pdc_packet_start(struct ata_queued_cmd *qc)
 563 {
 564         struct ata_port *ap = qc->ap;
 565         struct pdc_port_priv *pp = ap->private_data;
 566         unsigned int port_no = ap->port_no;
 567         u8 seq = (u8) (port_no + 1);
 568
 569         VPRINTK("ENTER, ap %p\n", ap);
 570
 571         writel(0x00000001, ap->host->mmio_base + (seq * 4));
 572         readl(ap->host->mmio_base + (seq * 4)); /* flush */
 573
 574         pp->pkt[2] = seq;
 575         wmb();                  /* flush PRD, pkt writes */
 576         writel(pp->pkt_dma, (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 577         readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); /* flush */
 578 }
 579
 580 static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc)
 581 {
 582         switch (qc->tf.protocol) {
 583         case ATA_PROT_DMA:
 584         case ATA_PROT_NODATA:
 585                 pdc_packet_start(qc);
 586                 return 0;
 587
 588         case ATA_PROT_ATAPI_DMA:
 589                 BUG();
 590                 break;
 591
 592         default:
 593                 break;
 594         }
 595
 596         return ata_qc_issue_prot(qc);
 597 }
 598
 599 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 600 {
 601         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 602                  tf->protocol == ATA_PROT_NODATA);
 603         ata_tf_load(ap, tf);
 604 }
 605
 606
 607 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 608 {
 609         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 610                  tf->protocol == ATA_PROT_NODATA);
 611         ata_exec_command(ap, tf);
 612 }
 613
 614
 615 static void pdc_ata_setup_port(struct ata_ioports *port, unsigned long base)
 616 {
 617         port->cmd_addr          = base;
 618         port->data_addr         = base;
 619         port->feature_addr      =
 620         port->error_addr        = base + 0x4;
 621         port->nsect_addr        = base + 0x8;
 622         port->lbal_addr         = base + 0xc;
 623         port->lbam_addr         = base + 0x10;
 624         port->lbah_addr         = base + 0x14;
 625         port->device_addr       = base + 0x18;
 626         port->command_addr      =
 627         port->status_addr       = base + 0x1c;
 628         port->altstatus_addr    =
 629         port->ctl_addr          = base + 0x38;
 630 }
 631
 632
 633 static void pdc_host_init(unsigned int chip_id, struct ata_probe_ent *pe)
 634 {
 635         void __iomem *mmio = pe->mmio_base;
 636         struct pdc_host_priv *hp = pe->private_data;
 637         int hotplug_offset = hp->hotplug_offset;
 638         u32 tmp;
 639
 640         /*
 641          * Except for the hotplug stuff, this is voodoo from the
 642          * Promise driver.  Label this entire section
 643          * "TODO: figure out why we do this"
 644          */
 645
 646         /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
 647         tmp = readl(mmio + PDC_FLASH_CTL);
 648         tmp |= 0x02000; /* bit 13 (enable bmr burst) */
 649         if (!(hp->flags & PDC_FLAG_GEN_II))
 650                 tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
 651         writel(tmp, mmio + PDC_FLASH_CTL);
 652
 653         /* clear plug/unplug flags for all ports */
 654         tmp = readl(mmio + hotplug_offset);
 655         writel(tmp | 0xff, mmio + hotplug_offset);
 656
 657         /* mask plug/unplug ints */
 658         tmp = readl(mmio + hotplug_offset);
 659         writel(tmp | 0xff0000, mmio + hotplug_offset);
 660
 661         /* don't initialise TBG or SLEW on 2nd generation chips */
 662         if (hp->flags & PDC_FLAG_GEN_II)
 663                 return;
 664
 665         /* reduce TBG clock to 133 Mhz. */
 666         tmp = readl(mmio + PDC_TBG_MODE);
 667         tmp &= ~0x30000; /* clear bit 17, 16*/
 668         tmp |= 0x10000;  /* set bit 17:16 = 0:1 */
 669         writel(tmp, mmio + PDC_TBG_MODE);
 670
 671         readl(mmio + PDC_TBG_MODE);     /* flush */
 672         msleep(10);
 673
 674         /* adjust slew rate control register. */
 675         tmp = readl(mmio + PDC_SLEW_CTL);
 676         tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
 677         tmp  |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
 678         writel(tmp, mmio + PDC_SLEW_CTL);
 679 }
 680
 681 static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 682 {
 683         static int printed_version;
 684         struct ata_probe_ent *probe_ent = NULL;
 685         struct pdc_host_priv *hp;
 686         unsigned long base;
 687         void __iomem *mmio_base;
 688         unsigned int board_idx = (unsigned int) ent->driver_data;
 689         int pci_dev_busy = 0;
 690         int rc;
 691
 692         if (!printed_version++)
 693                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 694
 695         rc = pci_enable_device(pdev);
 696         if (rc)
 697                 return rc;
 698
 699         rc = pci_request_regions(pdev, DRV_NAME);
 700         if (rc) {
 701                 pci_dev_busy = 1;
 702                 goto err_out;
 703         }
 704
 705         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 706         if (rc)
 707                 goto err_out_regions;
 708         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 709         if (rc)
 710                 goto err_out_regions;
 711
 712         probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
 713         if (probe_ent == NULL) {
 714                 rc = -ENOMEM;
 715                 goto err_out_regions;
 716         }
 717
 718         probe_ent->dev = pci_dev_to_dev(pdev);
 719         INIT_LIST_HEAD(&probe_ent->node);
 720
 721         mmio_base = pci_iomap(pdev, 3, 0);
 722         if (mmio_base == NULL) {
 723                 rc = -ENOMEM;
 724                 goto err_out_free_ent;
 725         }
 726         base = (unsigned long) mmio_base;
 727
 728         hp = kzalloc(sizeof(*hp), GFP_KERNEL);
 729         if (hp == NULL) {
 730                 rc = -ENOMEM;
 731                 goto err_out_free_ent;
 732         }
 733
 734         /* Set default hotplug offset */
 735         hp->hotplug_offset = PDC_SATA_PLUG_CSR;
 736         probe_ent->private_data = hp;
 737
 738         probe_ent->sht          = pdc_port_info[board_idx].sht;
 739         probe_ent->port_flags   = pdc_port_info[board_idx].flags;
 740         probe_ent->pio_mask     = pdc_port_info[board_idx].pio_mask;
 741         probe_ent->mwdma_mask   = pdc_port_info[board_idx].mwdma_mask;
 742         probe_ent->udma_mask    = pdc_port_info[board_idx].udma_mask;
 743         probe_ent->port_ops     = pdc_port_info[board_idx].port_ops;
 744
 745         probe_ent->irq = pdev->irq;
 746         probe_ent->irq_flags = IRQF_SHARED;
 747         probe_ent->mmio_base = mmio_base;
 748
 749         pdc_ata_setup_port(&probe_ent->port[0], base + 0x200);
 750         pdc_ata_setup_port(&probe_ent->port[1], base + 0x280);
 751
 752         probe_ent->port[0].scr_addr = base + 0x400;
 753         probe_ent->port[1].scr_addr = base + 0x500;
 754
 755         /* notice 4-port boards */
 756         switch (board_idx) {
 757         case board_40518:
 758                 hp->flags |= PDC_FLAG_GEN_II;
 759                 /* Override hotplug offset for SATAII150 */
 760                 hp->hotplug_offset = PDC2_SATA_PLUG_CSR;
 761                 /* Fall through */
 762         case board_20319:
 763                 probe_ent->n_ports = 4;
 764
 765                 pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
 766                 pdc_ata_setup_port(&probe_ent->port[3], base + 0x380);
 767
 768                 probe_ent->port[2].scr_addr = base + 0x600;
 769                 probe_ent->port[3].scr_addr = base + 0x700;
 770                 break;
 771         case board_2057x:
 772         case board_20771:
 773                 hp->flags |= PDC_FLAG_GEN_II;
 774                 /* Override hotplug offset for SATAII150 */
 775                 hp->hotplug_offset = PDC2_SATA_PLUG_CSR;
 776                 /* Fall through */
 777         case board_2037x:
 778                 probe_ent->n_ports = 2;
 779                 break;
 780         case board_20619:
 781                 probe_ent->n_ports = 4;
 782
 783                 pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
 784                 pdc_ata_setup_port(&probe_ent->port[3], base + 0x380);
 785
 786                 probe_ent->port[2].scr_addr = base + 0x600;
 787                 probe_ent->port[3].scr_addr = base + 0x700;
 788                 break;
 789         default:
 790                 BUG();
 791                 break;
 792         }
 793
 794         pci_set_master(pdev);
 795
 796         /* initialize adapter */
 797         pdc_host_init(board_idx, probe_ent);
 798
 799         /* FIXME: Need any other frees than hp? */
 800         if (!ata_device_add(probe_ent))
 801                 kfree(hp);
 802
 803         kfree(probe_ent);
 804
 805         return 0;
 806
 807 err_out_free_ent:
 808         kfree(probe_ent);
 809 err_out_regions:
 810         pci_release_regions(pdev);
 811 err_out:
 812         if (!pci_dev_busy)
 813                 pci_disable_device(pdev);
 814         return rc;
 815 }
 816
 817
 818 static int __init pdc_ata_init(void)
 819 {
 820         return pci_register_driver(&pdc_ata_pci_driver);
 821 }
 822
 823
 824 static void __exit pdc_ata_exit(void)
 825 {
 826         pci_unregister_driver(&pdc_ata_pci_driver);
 827 }
 828
 829
 830 MODULE_AUTHOR("Jeff Garzik");
 831 MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
 832 MODULE_LICENSE("GPL");
 833 MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
 834 MODULE_VERSION(DRV_VERSION);
 835
 836 module_init(pdc_ata_init);
 837 module_exit(pdc_ata_exit);