drivers/scsi/sata_sx4.c

   1 /*
   2  *  sata_sx4.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 documentation 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.h"
  43 #include <scsi/scsi_host.h>
  44 #include <linux/libata.h>
  45 #include <asm/io.h>
  46 #include "sata_promise.h"
  47
  48 #define DRV_NAME        "sata_sx4"
  49 #define DRV_VERSION     "0.7"
  50
  51
  52 enum {
  53         PDC_PRD_TBL             = 0x44, /* Direct command DMA table addr */
  54
  55         PDC_PKT_SUBMIT          = 0x40, /* Command packet pointer addr */
  56         PDC_HDMA_PKT_SUBMIT     = 0x100, /* Host DMA packet pointer addr */
  57         PDC_INT_SEQMASK         = 0x40, /* Mask of asserted SEQ INTs */
  58         PDC_HDMA_CTLSTAT        = 0x12C, /* Host DMA control / status */
  59
  60         PDC_20621_SEQCTL        = 0x400,
  61         PDC_20621_SEQMASK       = 0x480,
  62         PDC_20621_GENERAL_CTL   = 0x484,
  63         PDC_20621_PAGE_SIZE     = (32 * 1024),
  64
  65         /* chosen, not constant, values; we design our own DIMM mem map */
  66         PDC_20621_DIMM_WINDOW   = 0x0C, /* page# for 32K DIMM window */
  67         PDC_20621_DIMM_BASE     = 0x00200000,
  68         PDC_20621_DIMM_DATA     = (64 * 1024),
  69         PDC_DIMM_DATA_STEP      = (256 * 1024),
  70         PDC_DIMM_WINDOW_STEP    = (8 * 1024),
  71         PDC_DIMM_HOST_PRD       = (6 * 1024),
  72         PDC_DIMM_HOST_PKT       = (128 * 0),
  73         PDC_DIMM_HPKT_PRD       = (128 * 1),
  74         PDC_DIMM_ATA_PKT        = (128 * 2),
  75         PDC_DIMM_APKT_PRD       = (128 * 3),
  76         PDC_DIMM_HEADER_SZ      = PDC_DIMM_APKT_PRD + 128,
  77         PDC_PAGE_WINDOW         = 0x40,
  78         PDC_PAGE_DATA           = PDC_PAGE_WINDOW +
  79                                   (PDC_20621_DIMM_DATA / PDC_20621_PAGE_SIZE),
  80         PDC_PAGE_SET            = PDC_DIMM_DATA_STEP / PDC_20621_PAGE_SIZE,
  81
  82         PDC_CHIP0_OFS           = 0xC0000, /* offset of chip #0 */
  83
  84         PDC_20621_ERR_MASK      = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
  85                                   (1<<23),
  86
  87         board_20621             = 0,    /* FastTrak S150 SX4 */
  88
  89         PDC_RESET               = (1 << 11), /* HDMA reset */
  90
  91         PDC_MAX_HDMA            = 32,
  92         PDC_HDMA_Q_MASK         = (PDC_MAX_HDMA - 1),
  93
  94         PDC_DIMM0_SPD_DEV_ADDRESS     = 0x50,
  95         PDC_DIMM1_SPD_DEV_ADDRESS     = 0x51,
  96         PDC_MAX_DIMM_MODULE           = 0x02,
  97         PDC_I2C_CONTROL_OFFSET        = 0x48,
  98         PDC_I2C_ADDR_DATA_OFFSET      = 0x4C,
  99         PDC_DIMM0_CONTROL_OFFSET      = 0x80,
 100         PDC_DIMM1_CONTROL_OFFSET      = 0x84,
 101         PDC_SDRAM_CONTROL_OFFSET      = 0x88,
 102         PDC_I2C_WRITE                 = 0x00000000,
 103         PDC_I2C_READ                  = 0x00000040,
 104         PDC_I2C_START                 = 0x00000080,
 105         PDC_I2C_MASK_INT              = 0x00000020,
 106         PDC_I2C_COMPLETE              = 0x00010000,
 107         PDC_I2C_NO_ACK                = 0x00100000,
 108         PDC_DIMM_SPD_SUBADDRESS_START = 0x00,
 109         PDC_DIMM_SPD_SUBADDRESS_END   = 0x7F,
 110         PDC_DIMM_SPD_ROW_NUM          = 3,
 111         PDC_DIMM_SPD_COLUMN_NUM       = 4,
 112         PDC_DIMM_SPD_MODULE_ROW       = 5,
 113         PDC_DIMM_SPD_TYPE             = 11,
 114         PDC_DIMM_SPD_FRESH_RATE       = 12,
 115         PDC_DIMM_SPD_BANK_NUM         = 17,
 116         PDC_DIMM_SPD_CAS_LATENCY      = 18,
 117         PDC_DIMM_SPD_ATTRIBUTE        = 21,
 118         PDC_DIMM_SPD_ROW_PRE_CHARGE   = 27,
 119         PDC_DIMM_SPD_ROW_ACTIVE_DELAY = 28,
 120         PDC_DIMM_SPD_RAS_CAS_DELAY    = 29,
 121         PDC_DIMM_SPD_ACTIVE_PRECHARGE = 30,
 122         PDC_DIMM_SPD_SYSTEM_FREQ      = 126,
 123         PDC_CTL_STATUS                = 0x08,
 124         PDC_DIMM_WINDOW_CTLR          = 0x0C,
 125         PDC_TIME_CONTROL              = 0x3C,
 126         PDC_TIME_PERIOD               = 0x40,
 127         PDC_TIME_COUNTER              = 0x44,
 128         PDC_GENERAL_CTLR              = 0x484,
 129         PCI_PLL_INIT                  = 0x8A531824,
 130         PCI_X_TCOUNT                  = 0xEE1E5CFF
 131 };
 132
 133
 134 struct pdc_port_priv {
 135         u8                      dimm_buf[(ATA_PRD_SZ * ATA_MAX_PRD) + 512];
 136         u8                      *pkt;
 137         dma_addr_t              pkt_dma;
 138 };
 139
 140 struct pdc_host_priv {
 141         void                    __iomem *dimm_mmio;
 142
 143         unsigned int            doing_hdma;
 144         unsigned int            hdma_prod;
 145         unsigned int            hdma_cons;
 146         struct {
 147                 struct ata_queued_cmd *qc;
 148                 unsigned int    seq;
 149                 unsigned long   pkt_ofs;
 150         } hdma[32];
 151 };
 152
 153
 154 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 155 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
 156 static void pdc_eng_timeout(struct ata_port *ap);
 157 static void pdc_20621_phy_reset (struct ata_port *ap);
 158 static int pdc_port_start(struct ata_port *ap);
 159 static void pdc_port_stop(struct ata_port *ap);
 160 static void pdc20621_qc_prep(struct ata_queued_cmd *qc);
 161 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 162 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 163 static void pdc20621_host_stop(struct ata_host_set *host_set);
 164 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe);
 165 static int pdc20621_detect_dimm(struct ata_probe_ent *pe);
 166 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe,
 167                                       u32 device, u32 subaddr, u32 *pdata);
 168 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe);
 169 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe);
 170 #ifdef ATA_VERBOSE_DEBUG
 171 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe,
 172                                    void *psource, u32 offset, u32 size);
 173 #endif
 174 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe,
 175                                  void *psource, u32 offset, u32 size);
 176 static void pdc20621_irq_clear(struct ata_port *ap);
 177 static int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc);
 178
 179
 180 static Scsi_Host_Template pdc_sata_sht = {
 181         .module                 = THIS_MODULE,
 182         .name                   = DRV_NAME,
 183         .ioctl                  = ata_scsi_ioctl,
 184         .queuecommand           = ata_scsi_queuecmd,
 185         .eh_strategy_handler    = ata_scsi_error,
 186         .can_queue              = ATA_DEF_QUEUE,
 187         .this_id                = ATA_SHT_THIS_ID,
 188         .sg_tablesize           = LIBATA_MAX_PRD,
 189         .max_sectors            = ATA_MAX_SECTORS,
 190         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 191         .emulated               = ATA_SHT_EMULATED,
 192         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 193         .proc_name              = DRV_NAME,
 194         .dma_boundary           = ATA_DMA_BOUNDARY,
 195         .slave_configure        = ata_scsi_slave_config,
 196         .bios_param             = ata_std_bios_param,
 197         .ordered_flush          = 1,
 198 };
 199
 200 static const struct ata_port_operations pdc_20621_ops = {
 201         .port_disable           = ata_port_disable,
 202         .tf_load                = pdc_tf_load_mmio,
 203         .tf_read                = ata_tf_read,
 204         .check_status           = ata_check_status,
 205         .exec_command           = pdc_exec_command_mmio,
 206         .dev_select             = ata_std_dev_select,
 207         .phy_reset              = pdc_20621_phy_reset,
 208         .qc_prep                = pdc20621_qc_prep,
 209         .qc_issue               = pdc20621_qc_issue_prot,
 210         .eng_timeout            = pdc_eng_timeout,
 211         .irq_handler            = pdc20621_interrupt,
 212         .irq_clear              = pdc20621_irq_clear,
 213         .port_start             = pdc_port_start,
 214         .port_stop              = pdc_port_stop,
 215         .host_stop              = pdc20621_host_stop,
 216 };
 217
 218 static struct ata_port_info pdc_port_info[] = {
 219         /* board_20621 */
 220         {
 221                 .sht            = &pdc_sata_sht,
 222                 .host_flags     = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 223                                   ATA_FLAG_SRST | ATA_FLAG_MMIO,
 224                 .pio_mask       = 0x1f, /* pio0-4 */
 225                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 226                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 227                 .port_ops       = &pdc_20621_ops,
 228         },
 229
 230 };
 231
 232 static struct pci_device_id pdc_sata_pci_tbl[] = {
 233         { PCI_VENDOR_ID_PROMISE, 0x6622, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 234           board_20621 },
 235         { }     /* terminate list */
 236 };
 237
 238
 239 static struct pci_driver pdc_sata_pci_driver = {
 240         .name                   = DRV_NAME,
 241         .id_table               = pdc_sata_pci_tbl,
 242         .probe                  = pdc_sata_init_one,
 243         .remove                 = ata_pci_remove_one,
 244 };
 245
 246
 247 static void pdc20621_host_stop(struct ata_host_set *host_set)
 248 {
 249         struct pci_dev *pdev = to_pci_dev(host_set->dev);
 250         struct pdc_host_priv *hpriv = host_set->private_data;
 251         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 252
 253         pci_iounmap(pdev, dimm_mmio);
 254         kfree(hpriv);
 255
 256         pci_iounmap(pdev, host_set->mmio_base);
 257 }
 258
 259 static int pdc_port_start(struct ata_port *ap)
 260 {
 261         struct device *dev = ap->host_set->dev;
 262         struct pdc_port_priv *pp;
 263         int rc;
 264
 265         rc = ata_port_start(ap);
 266         if (rc)
 267                 return rc;
 268
 269         pp = kmalloc(sizeof(*pp), GFP_KERNEL);
 270         if (!pp) {
 271                 rc = -ENOMEM;
 272                 goto err_out;
 273         }
 274         memset(pp, 0, sizeof(*pp));
 275
 276         pp->pkt = dma_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
 277         if (!pp->pkt) {
 278                 rc = -ENOMEM;
 279                 goto err_out_kfree;
 280         }
 281
 282         ap->private_data = pp;
 283
 284         return 0;
 285
 286 err_out_kfree:
 287         kfree(pp);
 288 err_out:
 289         ata_port_stop(ap);
 290         return rc;
 291 }
 292
 293
 294 static void pdc_port_stop(struct ata_port *ap)
 295 {
 296         struct device *dev = ap->host_set->dev;
 297         struct pdc_port_priv *pp = ap->private_data;
 298
 299         ap->private_data = NULL;
 300         dma_free_coherent(dev, 128, pp->pkt, pp->pkt_dma);
 301         kfree(pp);
 302         ata_port_stop(ap);
 303 }
 304
 305
 306 static void pdc_20621_phy_reset (struct ata_port *ap)
 307 {
 308         VPRINTK("ENTER\n");
 309         ap->cbl = ATA_CBL_SATA;
 310         ata_port_probe(ap);
 311         ata_bus_reset(ap);
 312 }
 313
 314 static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
 315                                            unsigned int portno,
 316                                            unsigned int total_len)
 317 {
 318         u32 addr;
 319         unsigned int dw = PDC_DIMM_APKT_PRD >> 2;
 320         u32 *buf32 = (u32 *) buf;
 321
 322         /* output ATA packet S/G table */
 323         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
 324                (PDC_DIMM_DATA_STEP * portno);
 325         VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr);
 326         buf32[dw] = cpu_to_le32(addr);
 327         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
 328
 329         VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n",
 330                 PDC_20621_DIMM_BASE +
 331                        (PDC_DIMM_WINDOW_STEP * portno) +
 332                        PDC_DIMM_APKT_PRD,
 333                 buf32[dw], buf32[dw + 1]);
 334 }
 335
 336 static inline void pdc20621_host_sg(struct ata_taskfile *tf, u8 *buf,
 337                                             unsigned int portno,
 338                                             unsigned int total_len)
 339 {
 340         u32 addr;
 341         unsigned int dw = PDC_DIMM_HPKT_PRD >> 2;
 342         u32 *buf32 = (u32 *) buf;
 343
 344         /* output Host DMA packet S/G table */
 345         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
 346                (PDC_DIMM_DATA_STEP * portno);
 347
 348         buf32[dw] = cpu_to_le32(addr);
 349         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
 350
 351         VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n",
 352                 PDC_20621_DIMM_BASE +
 353                        (PDC_DIMM_WINDOW_STEP * portno) +
 354                        PDC_DIMM_HPKT_PRD,
 355                 buf32[dw], buf32[dw + 1]);
 356 }
 357
 358 static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf,
 359                                             unsigned int devno, u8 *buf,
 360                                             unsigned int portno)
 361 {
 362         unsigned int i, dw;
 363         u32 *buf32 = (u32 *) buf;
 364         u8 dev_reg;
 365
 366         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
 367                                (PDC_DIMM_WINDOW_STEP * portno) +
 368                                PDC_DIMM_APKT_PRD;
 369         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
 370
 371         i = PDC_DIMM_ATA_PKT;
 372
 373         /*
 374          * Set up ATA packet
 375          */
 376         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
 377                 buf[i++] = PDC_PKT_READ;
 378         else if (tf->protocol == ATA_PROT_NODATA)
 379                 buf[i++] = PDC_PKT_NODATA;
 380         else
 381                 buf[i++] = 0;
 382         buf[i++] = 0;                   /* reserved */
 383         buf[i++] = portno + 1;          /* seq. id */
 384         buf[i++] = 0xff;                /* delay seq. id */
 385
 386         /* dimm dma S/G, and next-pkt */
 387         dw = i >> 2;
 388         if (tf->protocol == ATA_PROT_NODATA)
 389                 buf32[dw] = 0;
 390         else
 391                 buf32[dw] = cpu_to_le32(dimm_sg);
 392         buf32[dw + 1] = 0;
 393         i += 8;
 394
 395         if (devno == 0)
 396                 dev_reg = ATA_DEVICE_OBS;
 397         else
 398                 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
 399
 400         /* select device */
 401         buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
 402         buf[i++] = dev_reg;
 403
 404         /* device control register */
 405         buf[i++] = (1 << 5) | PDC_REG_DEVCTL;
 406         buf[i++] = tf->ctl;
 407
 408         return i;
 409 }
 410
 411 static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf,
 412                                      unsigned int portno)
 413 {
 414         unsigned int dw;
 415         u32 tmp, *buf32 = (u32 *) buf;
 416
 417         unsigned int host_sg = PDC_20621_DIMM_BASE +
 418                                (PDC_DIMM_WINDOW_STEP * portno) +
 419                                PDC_DIMM_HOST_PRD;
 420         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
 421                                (PDC_DIMM_WINDOW_STEP * portno) +
 422                                PDC_DIMM_HPKT_PRD;
 423         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
 424         VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg);
 425
 426         dw = PDC_DIMM_HOST_PKT >> 2;
 427
 428         /*
 429          * Set up Host DMA packet
 430          */
 431         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
 432                 tmp = PDC_PKT_READ;
 433         else
 434                 tmp = 0;
 435         tmp |= ((portno + 1 + 4) << 16);        /* seq. id */
 436         tmp |= (0xff << 24);                    /* delay seq. id */
 437         buf32[dw + 0] = cpu_to_le32(tmp);
 438         buf32[dw + 1] = cpu_to_le32(host_sg);
 439         buf32[dw + 2] = cpu_to_le32(dimm_sg);
 440         buf32[dw + 3] = 0;
 441
 442         VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n",
 443                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) +
 444                         PDC_DIMM_HOST_PKT,
 445                 buf32[dw + 0],
 446                 buf32[dw + 1],
 447                 buf32[dw + 2],
 448                 buf32[dw + 3]);
 449 }
 450
 451 static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
 452 {
 453         struct scatterlist *sg = qc->sg;
 454         struct ata_port *ap = qc->ap;
 455         struct pdc_port_priv *pp = ap->private_data;
 456         void __iomem *mmio = ap->host_set->mmio_base;
 457         struct pdc_host_priv *hpriv = ap->host_set->private_data;
 458         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 459         unsigned int portno = ap->port_no;
 460         unsigned int i, last, idx, total_len = 0, sgt_len;
 461         u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
 462
 463         assert(qc->flags & ATA_QCFLAG_DMAMAP);
 464
 465         VPRINTK("ata%u: ENTER\n", ap->id);
 466
 467         /* hard-code chip #0 */
 468         mmio += PDC_CHIP0_OFS;
 469
 470         /*
 471          * Build S/G table
 472          */
 473         last = qc->n_elem;
 474         idx = 0;
 475         for (i = 0; i < last; i++) {
 476                 buf[idx++] = cpu_to_le32(sg_dma_address(&sg[i]));
 477                 buf[idx++] = cpu_to_le32(sg_dma_len(&sg[i]));
 478                 total_len += sg_dma_len(&sg[i]);
 479         }
 480         buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
 481         sgt_len = idx * 4;
 482
 483         /*
 484          * Build ATA, host DMA packets
 485          */
 486         pdc20621_host_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
 487         pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno);
 488
 489         pdc20621_ata_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
 490         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
 491
 492         if (qc->tf.flags & ATA_TFLAG_LBA48)
 493                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
 494         else
 495                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
 496
 497         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
 498
 499         /* copy three S/G tables and two packets to DIMM MMIO window */
 500         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
 501                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
 502         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) +
 503                     PDC_DIMM_HOST_PRD,
 504                     &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len);
 505
 506         /* force host FIFO dump */
 507         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
 508
 509         readl(dimm_mmio);       /* MMIO PCI posting flush */
 510
 511         VPRINTK("ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len);
 512 }
 513
 514 static void pdc20621_nodata_prep(struct ata_queued_cmd *qc)
 515 {
 516         struct ata_port *ap = qc->ap;
 517         struct pdc_port_priv *pp = ap->private_data;
 518         void __iomem *mmio = ap->host_set->mmio_base;
 519         struct pdc_host_priv *hpriv = ap->host_set->private_data;
 520         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 521         unsigned int portno = ap->port_no;
 522         unsigned int i;
 523
 524         VPRINTK("ata%u: ENTER\n", ap->id);
 525
 526         /* hard-code chip #0 */
 527         mmio += PDC_CHIP0_OFS;
 528
 529         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
 530
 531         if (qc->tf.flags & ATA_TFLAG_LBA48)
 532                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
 533         else
 534                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
 535
 536         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
 537
 538         /* copy three S/G tables and two packets to DIMM MMIO window */
 539         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
 540                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
 541
 542         /* force host FIFO dump */
 543         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
 544
 545         readl(dimm_mmio);       /* MMIO PCI posting flush */
 546
 547         VPRINTK("ata pkt buf ofs %u, mmio copied\n", i);
 548 }
 549
 550 static void pdc20621_qc_prep(struct ata_queued_cmd *qc)
 551 {
 552         switch (qc->tf.protocol) {
 553         case ATA_PROT_DMA:
 554                 pdc20621_dma_prep(qc);
 555                 break;
 556         case ATA_PROT_NODATA:
 557                 pdc20621_nodata_prep(qc);
 558                 break;
 559         default:
 560                 break;
 561         }
 562 }
 563
 564 static void __pdc20621_push_hdma(struct ata_queued_cmd *qc,
 565                                  unsigned int seq,
 566                                  u32 pkt_ofs)
 567 {
 568         struct ata_port *ap = qc->ap;
 569         struct ata_host_set *host_set = ap->host_set;
 570         void __iomem *mmio = host_set->mmio_base;
 571
 572         /* hard-code chip #0 */
 573         mmio += PDC_CHIP0_OFS;
 574
 575         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 576         readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
 577
 578         writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT);
 579         readl(mmio + PDC_HDMA_PKT_SUBMIT);      /* flush */
 580 }
 581
 582 static void pdc20621_push_hdma(struct ata_queued_cmd *qc,
 583                                 unsigned int seq,
 584                                 u32 pkt_ofs)
 585 {
 586         struct ata_port *ap = qc->ap;
 587         struct pdc_host_priv *pp = ap->host_set->private_data;
 588         unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK;
 589
 590         if (!pp->doing_hdma) {
 591                 __pdc20621_push_hdma(qc, seq, pkt_ofs);
 592                 pp->doing_hdma = 1;
 593                 return;
 594         }
 595
 596         pp->hdma[idx].qc = qc;
 597         pp->hdma[idx].seq = seq;
 598         pp->hdma[idx].pkt_ofs = pkt_ofs;
 599         pp->hdma_prod++;
 600 }
 601
 602 static void pdc20621_pop_hdma(struct ata_queued_cmd *qc)
 603 {
 604         struct ata_port *ap = qc->ap;
 605         struct pdc_host_priv *pp = ap->host_set->private_data;
 606         unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK;
 607
 608         /* if nothing on queue, we're done */
 609         if (pp->hdma_prod == pp->hdma_cons) {
 610                 pp->doing_hdma = 0;
 611                 return;
 612         }
 613
 614         __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq,
 615                              pp->hdma[idx].pkt_ofs);
 616         pp->hdma_cons++;
 617 }
 618
 619 #ifdef ATA_VERBOSE_DEBUG
 620 static void pdc20621_dump_hdma(struct ata_queued_cmd *qc)
 621 {
 622         struct ata_port *ap = qc->ap;
 623         unsigned int port_no = ap->port_no;
 624         struct pdc_host_priv *hpriv = ap->host_set->private_data;
 625         void *dimm_mmio = hpriv->dimm_mmio;
 626
 627         dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP);
 628         dimm_mmio += PDC_DIMM_HOST_PKT;
 629
 630         printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio));
 631         printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4));
 632         printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8));
 633         printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12));
 634 }
 635 #else
 636 static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { }
 637 #endif /* ATA_VERBOSE_DEBUG */
 638
 639 static void pdc20621_packet_start(struct ata_queued_cmd *qc)
 640 {
 641         struct ata_port *ap = qc->ap;
 642         struct ata_host_set *host_set = ap->host_set;
 643         unsigned int port_no = ap->port_no;
 644         void __iomem *mmio = host_set->mmio_base;
 645         unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
 646         u8 seq = (u8) (port_no + 1);
 647         unsigned int port_ofs;
 648
 649         /* hard-code chip #0 */
 650         mmio += PDC_CHIP0_OFS;
 651
 652         VPRINTK("ata%u: ENTER\n", ap->id);
 653
 654         wmb();                  /* flush PRD, pkt writes */
 655
 656         port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
 657
 658         /* if writing, we (1) DMA to DIMM, then (2) do ATA command */
 659         if (rw && qc->tf.protocol == ATA_PROT_DMA) {
 660                 seq += 4;
 661
 662                 pdc20621_dump_hdma(qc);
 663                 pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT);
 664                 VPRINTK("queued ofs 0x%x (%u), seq %u\n",
 665                         port_ofs + PDC_DIMM_HOST_PKT,
 666                         port_ofs + PDC_DIMM_HOST_PKT,
 667                         seq);
 668         } else {
 669                 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 670                 readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
 671
 672                 writel(port_ofs + PDC_DIMM_ATA_PKT,
 673                        (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 674                 readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 675                 VPRINTK("submitted ofs 0x%x (%u), seq %u\n",
 676                         port_ofs + PDC_DIMM_ATA_PKT,
 677                         port_ofs + PDC_DIMM_ATA_PKT,
 678                         seq);
 679         }
 680 }
 681
 682 static int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc)
 683 {
 684         switch (qc->tf.protocol) {
 685         case ATA_PROT_DMA:
 686         case ATA_PROT_NODATA:
 687                 pdc20621_packet_start(qc);
 688                 return 0;
 689
 690         case ATA_PROT_ATAPI_DMA:
 691                 BUG();
 692                 break;
 693
 694         default:
 695                 break;
 696         }
 697
 698         return ata_qc_issue_prot(qc);
 699 }
 700
 701 static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
 702                                           struct ata_queued_cmd *qc,
 703                                           unsigned int doing_hdma,
 704                                           void __iomem *mmio)
 705 {
 706         unsigned int port_no = ap->port_no;
 707         unsigned int port_ofs =
 708                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
 709         u8 status;
 710         unsigned int handled = 0;
 711
 712         VPRINTK("ENTER\n");
 713
 714         if ((qc->tf.protocol == ATA_PROT_DMA) &&        /* read */
 715             (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
 716
 717                 /* step two - DMA from DIMM to host */
 718                 if (doing_hdma) {
 719                         VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->id,
 720                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 721                         /* get drive status; clear intr; complete txn */
 722                         ata_qc_complete(qc, ac_err_mask(ata_wait_idle(ap)));
 723                         pdc20621_pop_hdma(qc);
 724                 }
 725
 726                 /* step one - exec ATA command */
 727                 else {
 728                         u8 seq = (u8) (port_no + 1 + 4);
 729                         VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->id,
 730                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 731
 732                         /* submit hdma pkt */
 733                         pdc20621_dump_hdma(qc);
 734                         pdc20621_push_hdma(qc, seq,
 735                                            port_ofs + PDC_DIMM_HOST_PKT);
 736                 }
 737                 handled = 1;
 738
 739         } else if (qc->tf.protocol == ATA_PROT_DMA) {   /* write */
 740
 741                 /* step one - DMA from host to DIMM */
 742                 if (doing_hdma) {
 743                         u8 seq = (u8) (port_no + 1);
 744                         VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->id,
 745                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 746
 747                         /* submit ata pkt */
 748                         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 749                         readl(mmio + PDC_20621_SEQCTL + (seq * 4));
 750                         writel(port_ofs + PDC_DIMM_ATA_PKT,
 751                                (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 752                         readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 753                 }
 754
 755                 /* step two - execute ATA command */
 756                 else {
 757                         VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->id,
 758                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 759                         /* get drive status; clear intr; complete txn */
 760                         ata_qc_complete(qc, ac_err_mask(ata_wait_idle(ap)));
 761                         pdc20621_pop_hdma(qc);
 762                 }
 763                 handled = 1;
 764
 765         /* command completion, but no data xfer */
 766         } else if (qc->tf.protocol == ATA_PROT_NODATA) {
 767
 768                 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 769                 DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
 770                 ata_qc_complete(qc, ac_err_mask(status));
 771                 handled = 1;
 772
 773         } else {
 774                 ap->stats.idle_irq++;
 775         }
 776
 777         return handled;
 778 }
 779
 780 static void pdc20621_irq_clear(struct ata_port *ap)
 781 {
 782         struct ata_host_set *host_set = ap->host_set;
 783         void __iomem *mmio = host_set->mmio_base;
 784
 785         mmio += PDC_CHIP0_OFS;
 786
 787         readl(mmio + PDC_20621_SEQMASK);
 788 }
 789
 790 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
 791 {
 792         struct ata_host_set *host_set = dev_instance;
 793         struct ata_port *ap;
 794         u32 mask = 0;
 795         unsigned int i, tmp, port_no;
 796         unsigned int handled = 0;
 797         void __iomem *mmio_base;
 798
 799         VPRINTK("ENTER\n");
 800
 801         if (!host_set || !host_set->mmio_base) {
 802                 VPRINTK("QUICK EXIT\n");
 803                 return IRQ_NONE;
 804         }
 805
 806         mmio_base = host_set->mmio_base;
 807
 808         /* reading should also clear interrupts */
 809         mmio_base += PDC_CHIP0_OFS;
 810         mask = readl(mmio_base + PDC_20621_SEQMASK);
 811         VPRINTK("mask == 0x%x\n", mask);
 812
 813         if (mask == 0xffffffff) {
 814                 VPRINTK("QUICK EXIT 2\n");
 815                 return IRQ_NONE;
 816         }
 817         mask &= 0xffff;         /* only 16 tags possible */
 818         if (!mask) {
 819                 VPRINTK("QUICK EXIT 3\n");
 820                 return IRQ_NONE;
 821         }
 822
 823         spin_lock(&host_set->lock);
 824
 825         for (i = 1; i < 9; i++) {
 826                 port_no = i - 1;
 827                 if (port_no > 3)
 828                         port_no -= 4;
 829                 if (port_no >= host_set->n_ports)
 830                         ap = NULL;
 831                 else
 832                         ap = host_set->ports[port_no];
 833                 tmp = mask & (1 << i);
 834                 VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp);
 835                 if (tmp && ap &&
 836                     !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
 837                         struct ata_queued_cmd *qc;
 838
 839                         qc = ata_qc_from_tag(ap, ap->active_tag);
 840                         if (qc && (!(qc->tf.ctl & ATA_NIEN)))
 841                                 handled += pdc20621_host_intr(ap, qc, (i > 4),
 842                                                               mmio_base);
 843                 }
 844         }
 845
 846         spin_unlock(&host_set->lock);
 847
 848         VPRINTK("mask == 0x%x\n", mask);
 849
 850         VPRINTK("EXIT\n");
 851
 852         return IRQ_RETVAL(handled);
 853 }
 854
 855 static void pdc_eng_timeout(struct ata_port *ap)
 856 {
 857         u8 drv_stat;
 858         struct ata_host_set *host_set = ap->host_set;
 859         struct ata_queued_cmd *qc;
 860         unsigned long flags;
 861
 862         DPRINTK("ENTER\n");
 863
 864         spin_lock_irqsave(&host_set->lock, flags);
 865
 866         qc = ata_qc_from_tag(ap, ap->active_tag);
 867         if (!qc) {
 868                 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
 869                        ap->id);
 870                 goto out;
 871         }
 872
 873         /* hack alert!  We cannot use the supplied completion
 874          * function from inside the ->eh_strategy_handler() thread.
 875          * libata is the only user of ->eh_strategy_handler() in
 876          * any kernel, so the default scsi_done() assumes it is
 877          * not being called from the SCSI EH.
 878          */
 879         qc->scsidone = scsi_finish_command;
 880
 881         switch (qc->tf.protocol) {
 882         case ATA_PROT_DMA:
 883         case ATA_PROT_NODATA:
 884                 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
 885                 ata_qc_complete(qc, __ac_err_mask(ata_wait_idle(ap)));
 886                 break;
 887
 888         default:
 889                 drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 890
 891                 printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n",
 892                        ap->id, qc->tf.command, drv_stat);
 893
 894                 ata_qc_complete(qc, ac_err_mask(drv_stat));
 895                 break;
 896         }
 897
 898 out:
 899         spin_unlock_irqrestore(&host_set->lock, flags);
 900         DPRINTK("EXIT\n");
 901 }
 902
 903 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 904 {
 905         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 906                  tf->protocol == ATA_PROT_NODATA);
 907         ata_tf_load(ap, tf);
 908 }
 909
 910
 911 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 912 {
 913         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 914                  tf->protocol == ATA_PROT_NODATA);
 915         ata_exec_command(ap, tf);
 916 }
 917
 918
 919 static void pdc_sata_setup_port(struct ata_ioports *port, unsigned long base)
 920 {
 921         port->cmd_addr          = base;
 922         port->data_addr         = base;
 923         port->feature_addr      =
 924         port->error_addr        = base + 0x4;
 925         port->nsect_addr        = base + 0x8;
 926         port->lbal_addr         = base + 0xc;
 927         port->lbam_addr         = base + 0x10;
 928         port->lbah_addr         = base + 0x14;
 929         port->device_addr       = base + 0x18;
 930         port->command_addr      =
 931         port->status_addr       = base + 0x1c;
 932         port->altstatus_addr    =
 933         port->ctl_addr          = base + 0x38;
 934 }
 935
 936
 937 #ifdef ATA_VERBOSE_DEBUG
 938 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe, void *psource,
 939                                    u32 offset, u32 size)
 940 {
 941         u32 window_size;
 942         u16 idx;
 943         u8 page_mask;
 944         long dist;
 945         void __iomem *mmio = pe->mmio_base;
 946         struct pdc_host_priv *hpriv = pe->private_data;
 947         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 948
 949         /* hard-code chip #0 */
 950         mmio += PDC_CHIP0_OFS;
 951
 952         page_mask = 0x00;
 953         window_size = 0x2000 * 4; /* 32K byte uchar size */
 954         idx = (u16) (offset / window_size);
 955
 956         writel(0x01, mmio + PDC_GENERAL_CTLR);
 957         readl(mmio + PDC_GENERAL_CTLR);
 958         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 959         readl(mmio + PDC_DIMM_WINDOW_CTLR);
 960
 961         offset -= (idx * window_size);
 962         idx++;
 963         dist = ((long) (window_size - (offset + size))) >= 0 ? size :
 964                 (long) (window_size - offset);
 965         memcpy_fromio((char *) psource, (char *) (dimm_mmio + offset / 4),
 966                       dist);
 967
 968         psource += dist;
 969         size -= dist;
 970         for (; (long) size >= (long) window_size ;) {
 971                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 972                 readl(mmio + PDC_GENERAL_CTLR);
 973                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 974                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 975                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
 976                               window_size / 4);
 977                 psource += window_size;
 978                 size -= window_size;
 979                 idx ++;
 980         }
 981
 982         if (size) {
 983                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 984                 readl(mmio + PDC_GENERAL_CTLR);
 985                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 986                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 987                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
 988                               size / 4);
 989         }
 990 }
 991 #endif
 992
 993
 994 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource,
 995                                  u32 offset, u32 size)
 996 {
 997         u32 window_size;
 998         u16 idx;
 999         u8 page_mask;
1000         long dist;
1001         void __iomem *mmio = pe->mmio_base;
1002         struct pdc_host_priv *hpriv = pe->private_data;
1003         void __iomem *dimm_mmio = hpriv->dimm_mmio;
1004
1005         /* hard-code chip #0 */
1006         mmio += PDC_CHIP0_OFS;
1007
1008         page_mask = 0x00;
1009         window_size = 0x2000 * 4;       /* 32K byte uchar size */
1010         idx = (u16) (offset / window_size);
1011
1012         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1013         readl(mmio + PDC_DIMM_WINDOW_CTLR);
1014         offset -= (idx * window_size);
1015         idx++;
1016         dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size :
1017                 (long) (window_size - offset);
1018         memcpy_toio(dimm_mmio + offset / 4, psource, dist);
1019         writel(0x01, mmio + PDC_GENERAL_CTLR);
1020         readl(mmio + PDC_GENERAL_CTLR);
1021
1022         psource += dist;
1023         size -= dist;
1024         for (; (long) size >= (long) window_size ;) {
1025                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1026                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1027                 memcpy_toio(dimm_mmio, psource, window_size / 4);
1028                 writel(0x01, mmio + PDC_GENERAL_CTLR);
1029                 readl(mmio + PDC_GENERAL_CTLR);
1030                 psource += window_size;
1031                 size -= window_size;
1032                 idx ++;
1033         }
1034
1035         if (size) {
1036                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1037                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1038                 memcpy_toio(dimm_mmio, psource, size / 4);
1039                 writel(0x01, mmio + PDC_GENERAL_CTLR);
1040                 readl(mmio + PDC_GENERAL_CTLR);
1041         }
1042 }
1043
1044
1045 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe, u32 device,
1046                                       u32 subaddr, u32 *pdata)
1047 {
1048         void __iomem *mmio = pe->mmio_base;
1049         u32 i2creg  = 0;
1050         u32 status;
1051         u32 count =0;
1052
1053         /* hard-code chip #0 */
1054         mmio += PDC_CHIP0_OFS;
1055
1056         i2creg |= device << 24;
1057         i2creg |= subaddr << 16;
1058
1059         /* Set the device and subaddress */
1060         writel(i2creg, mmio + PDC_I2C_ADDR_DATA_OFFSET);
1061         readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1062
1063         /* Write Control to perform read operation, mask int */
1064         writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT,
1065                mmio + PDC_I2C_CONTROL_OFFSET);
1066
1067         for (count = 0; count <= 1000; count ++) {
1068                 status = readl(mmio + PDC_I2C_CONTROL_OFFSET);
1069                 if (status & PDC_I2C_COMPLETE) {
1070                         status = readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1071                         break;
1072                 } else if (count == 1000)
1073                         return 0;
1074         }
1075
1076         *pdata = (status >> 8) & 0x000000ff;
1077         return 1;
1078 }
1079
1080
1081 static int pdc20621_detect_dimm(struct ata_probe_ent *pe)
1082 {
1083         u32 data=0 ;
1084         if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1085                              PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
1086                 if (data == 100)
1087                         return 100;
1088         } else
1089                 return 0;
1090
1091         if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
1092                 if(data <= 0x75)
1093                         return 133;
1094         } else
1095                 return 0;
1096
1097         return 0;
1098 }
1099
1100
1101 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe)
1102 {
1103         u32 spd0[50];
1104         u32 data = 0;
1105         int size, i;
1106         u8 bdimmsize;
1107         void __iomem *mmio = pe->mmio_base;
1108         static const struct {
1109                 unsigned int reg;
1110                 unsigned int ofs;
1111         } pdc_i2c_read_data [] = {
1112                 { PDC_DIMM_SPD_TYPE, 11 },
1113                 { PDC_DIMM_SPD_FRESH_RATE, 12 },
1114                 { PDC_DIMM_SPD_COLUMN_NUM, 4 },
1115                 { PDC_DIMM_SPD_ATTRIBUTE, 21 },
1116                 { PDC_DIMM_SPD_ROW_NUM, 3 },
1117                 { PDC_DIMM_SPD_BANK_NUM, 17 },
1118                 { PDC_DIMM_SPD_MODULE_ROW, 5 },
1119                 { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 },
1120                 { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 },
1121                 { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 },
1122                 { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 },
1123                 { PDC_DIMM_SPD_CAS_LATENCY, 18 },
1124         };
1125
1126         /* hard-code chip #0 */
1127         mmio += PDC_CHIP0_OFS;
1128
1129         for(i=0; i<ARRAY_SIZE(pdc_i2c_read_data); i++)
1130                 pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1131                                   pdc_i2c_read_data[i].reg,
1132                                   &spd0[pdc_i2c_read_data[i].ofs]);
1133
1134         data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4);
1135         data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) |
1136                 ((((spd0[27] + 9) / 10) - 1) << 8) ;
1137         data |= (((((spd0[29] > spd0[28])
1138                     ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10;
1139         data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12;
1140
1141         if (spd0[18] & 0x08)
1142                 data |= ((0x03) << 14);
1143         else if (spd0[18] & 0x04)
1144                 data |= ((0x02) << 14);
1145         else if (spd0[18] & 0x01)
1146                 data |= ((0x01) << 14);
1147         else
1148                 data |= (0 << 14);
1149
1150         /*
1151            Calculate the size of bDIMMSize (power of 2) and
1152            merge the DIMM size by program start/end address.
1153         */
1154
1155         bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3;
1156         size = (1 << bdimmsize) >> 20;  /* size = xxx(MB) */
1157         data |= (((size / 16) - 1) << 16);
1158         data |= (0 << 23);
1159         data |= 8;
1160         writel(data, mmio + PDC_DIMM0_CONTROL_OFFSET);
1161         readl(mmio + PDC_DIMM0_CONTROL_OFFSET);
1162         return size;
1163 }
1164
1165
1166 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe)
1167 {
1168         u32 data, spd0;
1169         int error, i;
1170         void __iomem *mmio = pe->mmio_base;
1171
1172         /* hard-code chip #0 */
1173         mmio += PDC_CHIP0_OFS;
1174
1175         /*
1176           Set To Default : DIMM Module Global Control Register (0x022259F1)
1177           DIMM Arbitration Disable (bit 20)
1178           DIMM Data/Control Output Driving Selection (bit12 - bit15)
1179           Refresh Enable (bit 17)
1180         */
1181
1182         data = 0x022259F1;
1183         writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1184         readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1185
1186         /* Turn on for ECC */
1187         pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1188                           PDC_DIMM_SPD_TYPE, &spd0);
1189         if (spd0 == 0x02) {
1190                 data |= (0x01 << 16);
1191                 writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1192                 readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1193                 printk(KERN_ERR "Local DIMM ECC Enabled\n");
1194         }
1195
1196         /* DIMM Initialization Select/Enable (bit 18/19) */
1197         data &= (~(1<<18));
1198         data |= (1<<19);
1199         writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1200
1201         error = 1;
1202         for (i = 1; i <= 10; i++) {   /* polling ~5 secs */
1203                 data = readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1204                 if (!(data & (1<<19))) {
1205                         error = 0;
1206                         break;
1207                 }
1208                 msleep(i*100);
1209         }
1210         return error;
1211 }
1212
1213
1214 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe)
1215 {
1216         int speed, size, length;
1217         u32 addr,spd0,pci_status;
1218         u32 tmp=0;
1219         u32 time_period=0;
1220         u32 tcount=0;
1221         u32 ticks=0;
1222         u32 clock=0;
1223         u32 fparam=0;
1224         void __iomem *mmio = pe->mmio_base;
1225
1226         /* hard-code chip #0 */
1227         mmio += PDC_CHIP0_OFS;
1228
1229         /* Initialize PLL based upon PCI Bus Frequency */
1230
1231         /* Initialize Time Period Register */
1232         writel(0xffffffff, mmio + PDC_TIME_PERIOD);
1233         time_period = readl(mmio + PDC_TIME_PERIOD);
1234         VPRINTK("Time Period Register (0x40): 0x%x\n", time_period);
1235
1236         /* Enable timer */
1237         writel(0x00001a0, mmio + PDC_TIME_CONTROL);
1238         readl(mmio + PDC_TIME_CONTROL);
1239
1240         /* Wait 3 seconds */
1241         msleep(3000);
1242
1243         /*
1244            When timer is enabled, counter is decreased every internal
1245            clock cycle.
1246         */
1247
1248         tcount = readl(mmio + PDC_TIME_COUNTER);
1249         VPRINTK("Time Counter Register (0x44): 0x%x\n", tcount);
1250
1251         /*
1252            If SX4 is on PCI-X bus, after 3 seconds, the timer counter
1253            register should be >= (0xffffffff - 3x10^8).
1254         */
1255         if(tcount >= PCI_X_TCOUNT) {
1256                 ticks = (time_period - tcount);
1257                 VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks);
1258
1259                 clock = (ticks / 300000);
1260                 VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock);
1261
1262                 clock = (clock * 33);
1263                 VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock);
1264
1265                 /* PLL F Param (bit 22:16) */
1266                 fparam = (1400000 / clock) - 2;
1267                 VPRINTK("PLL F Param: 0x%x (%d)\n", fparam, fparam);
1268
1269                 /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */
1270                 pci_status = (0x8a001824 | (fparam << 16));
1271         } else
1272                 pci_status = PCI_PLL_INIT;
1273
1274         /* Initialize PLL. */
1275         VPRINTK("pci_status: 0x%x\n", pci_status);
1276         writel(pci_status, mmio + PDC_CTL_STATUS);
1277         readl(mmio + PDC_CTL_STATUS);
1278
1279         /*
1280            Read SPD of DIMM by I2C interface,
1281            and program the DIMM Module Controller.
1282         */
1283         if (!(speed = pdc20621_detect_dimm(pe))) {
1284                 printk(KERN_ERR "Detect Local DIMM Fail\n");
1285                 return 1;       /* DIMM error */
1286         }
1287         VPRINTK("Local DIMM Speed = %d\n", speed);
1288
1289         /* Programming DIMM0 Module Control Register (index_CID0:80h) */
1290         size = pdc20621_prog_dimm0(pe);
1291         VPRINTK("Local DIMM Size = %dMB\n",size);
1292
1293         /* Programming DIMM Module Global Control Register (index_CID0:88h) */
1294         if (pdc20621_prog_dimm_global(pe)) {
1295                 printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
1296                 return 1;
1297         }
1298
1299 #ifdef ATA_VERBOSE_DEBUG
1300         {
1301                 u8 test_parttern1[40] = {0x55,0xAA,'P','r','o','m','i','s','e',' ',
1302                                 'N','o','t',' ','Y','e','t',' ','D','e','f','i','n','e','d',' ',
1303                                  '1','.','1','0',
1304                                 '9','8','0','3','1','6','1','2',0,0};
1305                 u8 test_parttern2[40] = {0};
1306
1307                 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x10040, 40);
1308                 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x40, 40);
1309
1310                 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x10040, 40);
1311                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1312                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1313                        test_parttern2[1], &(test_parttern2[2]));
1314                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x10040,
1315                                        40);
1316                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1317                        test_parttern2[1], &(test_parttern2[2]));
1318
1319                 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x40, 40);
1320                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1321                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1322                        test_parttern2[1], &(test_parttern2[2]));
1323         }
1324 #endif
1325
1326         /* ECC initiliazation. */
1327
1328         pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1329                           PDC_DIMM_SPD_TYPE, &spd0);
1330         if (spd0 == 0x02) {
1331                 VPRINTK("Start ECC initialization\n");
1332                 addr = 0;
1333                 length = size * 1024 * 1024;
1334                 while (addr < length) {
1335                         pdc20621_put_to_dimm(pe, (void *) &tmp, addr,
1336                                              sizeof(u32));
1337                         addr += sizeof(u32);
1338                 }
1339                 VPRINTK("Finish ECC initialization\n");
1340         }
1341         return 0;
1342 }
1343
1344
1345 static void pdc_20621_init(struct ata_probe_ent *pe)
1346 {
1347         u32 tmp;
1348         void __iomem *mmio = pe->mmio_base;
1349
1350         /* hard-code chip #0 */
1351         mmio += PDC_CHIP0_OFS;
1352
1353         /*
1354          * Select page 0x40 for our 32k DIMM window
1355          */
1356         tmp = readl(mmio + PDC_20621_DIMM_WINDOW) & 0xffff0000;
1357         tmp |= PDC_PAGE_WINDOW; /* page 40h; arbitrarily selected */
1358         writel(tmp, mmio + PDC_20621_DIMM_WINDOW);
1359
1360         /*
1361          * Reset Host DMA
1362          */
1363         tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1364         tmp |= PDC_RESET;
1365         writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1366         readl(mmio + PDC_HDMA_CTLSTAT);         /* flush */
1367
1368         udelay(10);
1369
1370         tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1371         tmp &= ~PDC_RESET;
1372         writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1373         readl(mmio + PDC_HDMA_CTLSTAT);         /* flush */
1374 }
1375
1376 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1377 {
1378         static int printed_version;
1379         struct ata_probe_ent *probe_ent = NULL;
1380         unsigned long base;
1381         void __iomem *mmio_base;
1382         void __iomem *dimm_mmio = NULL;
1383         struct pdc_host_priv *hpriv = NULL;
1384         unsigned int board_idx = (unsigned int) ent->driver_data;
1385         int pci_dev_busy = 0;
1386         int rc;
1387
1388         if (!printed_version++)
1389                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1390
1391         /*
1392          * If this driver happens to only be useful on Apple's K2, then
1393          * we should check that here as it has a normal Serverworks ID
1394          */
1395         rc = pci_enable_device(pdev);
1396         if (rc)
1397                 return rc;
1398
1399         rc = pci_request_regions(pdev, DRV_NAME);
1400         if (rc) {
1401                 pci_dev_busy = 1;
1402                 goto err_out;
1403         }
1404
1405         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1406         if (rc)
1407                 goto err_out_regions;
1408         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1409         if (rc)
1410                 goto err_out_regions;
1411
1412         probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1413         if (probe_ent == NULL) {
1414                 rc = -ENOMEM;
1415                 goto err_out_regions;
1416         }
1417
1418         memset(probe_ent, 0, sizeof(*probe_ent));
1419         probe_ent->dev = pci_dev_to_dev(pdev);
1420         INIT_LIST_HEAD(&probe_ent->node);
1421
1422         mmio_base = pci_iomap(pdev, 3, 0);
1423         if (mmio_base == NULL) {
1424                 rc = -ENOMEM;
1425                 goto err_out_free_ent;
1426         }
1427         base = (unsigned long) mmio_base;
1428
1429         hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1430         if (!hpriv) {
1431                 rc = -ENOMEM;
1432                 goto err_out_iounmap;
1433         }
1434         memset(hpriv, 0, sizeof(*hpriv));
1435
1436         dimm_mmio = pci_iomap(pdev, 4, 0);
1437         if (!dimm_mmio) {
1438                 kfree(hpriv);
1439                 rc = -ENOMEM;
1440                 goto err_out_iounmap;
1441         }
1442
1443         hpriv->dimm_mmio = dimm_mmio;
1444
1445         probe_ent->sht          = pdc_port_info[board_idx].sht;
1446         probe_ent->host_flags   = pdc_port_info[board_idx].host_flags;
1447         probe_ent->pio_mask     = pdc_port_info[board_idx].pio_mask;
1448         probe_ent->mwdma_mask   = pdc_port_info[board_idx].mwdma_mask;
1449         probe_ent->udma_mask    = pdc_port_info[board_idx].udma_mask;
1450         probe_ent->port_ops     = pdc_port_info[board_idx].port_ops;
1451
1452         probe_ent->irq = pdev->irq;
1453         probe_ent->irq_flags = SA_SHIRQ;
1454         probe_ent->mmio_base = mmio_base;
1455
1456         probe_ent->private_data = hpriv;
1457         base += PDC_CHIP0_OFS;
1458
1459         probe_ent->n_ports = 4;
1460         pdc_sata_setup_port(&probe_ent->port[0], base + 0x200);
1461         pdc_sata_setup_port(&probe_ent->port[1], base + 0x280);
1462         pdc_sata_setup_port(&probe_ent->port[2], base + 0x300);
1463         pdc_sata_setup_port(&probe_ent->port[3], base + 0x380);
1464
1465         pci_set_master(pdev);
1466
1467         /* initialize adapter */
1468         /* initialize local dimm */
1469         if (pdc20621_dimm_init(probe_ent)) {
1470                 rc = -ENOMEM;
1471                 goto err_out_iounmap_dimm;
1472         }
1473         pdc_20621_init(probe_ent);
1474
1475         /* FIXME: check ata_device_add return value */
1476         ata_device_add(probe_ent);
1477         kfree(probe_ent);
1478
1479         return 0;
1480
1481 err_out_iounmap_dimm:           /* only get to this label if 20621 */
1482         kfree(hpriv);
1483         pci_iounmap(pdev, dimm_mmio);
1484 err_out_iounmap:
1485         pci_iounmap(pdev, mmio_base);
1486 err_out_free_ent:
1487         kfree(probe_ent);
1488 err_out_regions:
1489         pci_release_regions(pdev);
1490 err_out:
1491         if (!pci_dev_busy)
1492                 pci_disable_device(pdev);
1493         return rc;
1494 }
1495
1496
1497 static int __init pdc_sata_init(void)
1498 {
1499         return pci_module_init(&pdc_sata_pci_driver);
1500 }
1501
1502
1503 static void __exit pdc_sata_exit(void)
1504 {
1505         pci_unregister_driver(&pdc_sata_pci_driver);
1506 }
1507
1508
1509 MODULE_AUTHOR("Jeff Garzik");
1510 MODULE_DESCRIPTION("Promise SATA low-level driver");
1511 MODULE_LICENSE("GPL");
1512 MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl);
1513 MODULE_VERSION(DRV_VERSION);
1514
1515 module_init(pdc_sata_init);
1516 module_exit(pdc_sata_exit);