drivers/ata/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/scsi_host.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <linux/libata.h>
  45 #include "sata_promise.h"
  46
  47 #define DRV_NAME        "sata_sx4"
  48 #define DRV_VERSION     "0.9"
  49
  50
  51 enum {
  52         PDC_MMIO_BAR            = 3,
  53         PDC_DIMM_BAR            = 4,
  54
  55         PDC_PRD_TBL             = 0x44, /* Direct command DMA table addr */
  56
  57         PDC_PKT_SUBMIT          = 0x40, /* Command packet pointer addr */
  58         PDC_HDMA_PKT_SUBMIT     = 0x100, /* Host DMA packet pointer addr */
  59         PDC_INT_SEQMASK         = 0x40, /* Mask of asserted SEQ INTs */
  60         PDC_HDMA_CTLSTAT        = 0x12C, /* Host DMA control / status */
  61
  62         PDC_20621_SEQCTL        = 0x400,
  63         PDC_20621_SEQMASK       = 0x480,
  64         PDC_20621_GENERAL_CTL   = 0x484,
  65         PDC_20621_PAGE_SIZE     = (32 * 1024),
  66
  67         /* chosen, not constant, values; we design our own DIMM mem map */
  68         PDC_20621_DIMM_WINDOW   = 0x0C, /* page# for 32K DIMM window */
  69         PDC_20621_DIMM_BASE     = 0x00200000,
  70         PDC_20621_DIMM_DATA     = (64 * 1024),
  71         PDC_DIMM_DATA_STEP      = (256 * 1024),
  72         PDC_DIMM_WINDOW_STEP    = (8 * 1024),
  73         PDC_DIMM_HOST_PRD       = (6 * 1024),
  74         PDC_DIMM_HOST_PKT       = (128 * 0),
  75         PDC_DIMM_HPKT_PRD       = (128 * 1),
  76         PDC_DIMM_ATA_PKT        = (128 * 2),
  77         PDC_DIMM_APKT_PRD       = (128 * 3),
  78         PDC_DIMM_HEADER_SZ      = PDC_DIMM_APKT_PRD + 128,
  79         PDC_PAGE_WINDOW         = 0x40,
  80         PDC_PAGE_DATA           = PDC_PAGE_WINDOW +
  81                                   (PDC_20621_DIMM_DATA / PDC_20621_PAGE_SIZE),
  82         PDC_PAGE_SET            = PDC_DIMM_DATA_STEP / PDC_20621_PAGE_SIZE,
  83
  84         PDC_CHIP0_OFS           = 0xC0000, /* offset of chip #0 */
  85
  86         PDC_20621_ERR_MASK      = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
  87                                   (1<<23),
  88
  89         board_20621             = 0,    /* FastTrak S150 SX4 */
  90
  91         PDC_RESET               = (1 << 11), /* HDMA reset */
  92
  93         PDC_MAX_HDMA            = 32,
  94         PDC_HDMA_Q_MASK         = (PDC_MAX_HDMA - 1),
  95
  96         PDC_DIMM0_SPD_DEV_ADDRESS     = 0x50,
  97         PDC_DIMM1_SPD_DEV_ADDRESS     = 0x51,
  98         PDC_MAX_DIMM_MODULE           = 0x02,
  99         PDC_I2C_CONTROL_OFFSET        = 0x48,
 100         PDC_I2C_ADDR_DATA_OFFSET      = 0x4C,
 101         PDC_DIMM0_CONTROL_OFFSET      = 0x80,
 102         PDC_DIMM1_CONTROL_OFFSET      = 0x84,
 103         PDC_SDRAM_CONTROL_OFFSET      = 0x88,
 104         PDC_I2C_WRITE                 = 0x00000000,
 105         PDC_I2C_READ                  = 0x00000040,
 106         PDC_I2C_START                 = 0x00000080,
 107         PDC_I2C_MASK_INT              = 0x00000020,
 108         PDC_I2C_COMPLETE              = 0x00010000,
 109         PDC_I2C_NO_ACK                = 0x00100000,
 110         PDC_DIMM_SPD_SUBADDRESS_START = 0x00,
 111         PDC_DIMM_SPD_SUBADDRESS_END   = 0x7F,
 112         PDC_DIMM_SPD_ROW_NUM          = 3,
 113         PDC_DIMM_SPD_COLUMN_NUM       = 4,
 114         PDC_DIMM_SPD_MODULE_ROW       = 5,
 115         PDC_DIMM_SPD_TYPE             = 11,
 116         PDC_DIMM_SPD_FRESH_RATE       = 12,
 117         PDC_DIMM_SPD_BANK_NUM         = 17,
 118         PDC_DIMM_SPD_CAS_LATENCY      = 18,
 119         PDC_DIMM_SPD_ATTRIBUTE        = 21,
 120         PDC_DIMM_SPD_ROW_PRE_CHARGE   = 27,
 121         PDC_DIMM_SPD_ROW_ACTIVE_DELAY = 28,
 122         PDC_DIMM_SPD_RAS_CAS_DELAY    = 29,
 123         PDC_DIMM_SPD_ACTIVE_PRECHARGE = 30,
 124         PDC_DIMM_SPD_SYSTEM_FREQ      = 126,
 125         PDC_CTL_STATUS                = 0x08,
 126         PDC_DIMM_WINDOW_CTLR          = 0x0C,
 127         PDC_TIME_CONTROL              = 0x3C,
 128         PDC_TIME_PERIOD               = 0x40,
 129         PDC_TIME_COUNTER              = 0x44,
 130         PDC_GENERAL_CTLR              = 0x484,
 131         PCI_PLL_INIT                  = 0x8A531824,
 132         PCI_X_TCOUNT                  = 0xEE1E5CFF
 133 };
 134
 135
 136 struct pdc_port_priv {
 137         u8                      dimm_buf[(ATA_PRD_SZ * ATA_MAX_PRD) + 512];
 138         u8                      *pkt;
 139         dma_addr_t              pkt_dma;
 140 };
 141
 142 struct pdc_host_priv {
 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);
 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 pdc20621_qc_prep(struct ata_queued_cmd *qc);
 160 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 161 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 162 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe);
 163 static int pdc20621_detect_dimm(struct ata_probe_ent *pe);
 164 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe,
 165                                       u32 device, u32 subaddr, u32 *pdata);
 166 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe);
 167 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe);
 168 #ifdef ATA_VERBOSE_DEBUG
 169 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe,
 170                                    void *psource, u32 offset, u32 size);
 171 #endif
 172 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe,
 173                                  void *psource, u32 offset, u32 size);
 174 static void pdc20621_irq_clear(struct ata_port *ap);
 175 static unsigned int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc);
 176
 177
 178 static struct scsi_host_template pdc_sata_sht = {
 179         .module                 = THIS_MODULE,
 180         .name                   = DRV_NAME,
 181         .ioctl                  = ata_scsi_ioctl,
 182         .queuecommand           = ata_scsi_queuecmd,
 183         .can_queue              = ATA_DEF_QUEUE,
 184         .this_id                = ATA_SHT_THIS_ID,
 185         .sg_tablesize           = LIBATA_MAX_PRD,
 186         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 187         .emulated               = ATA_SHT_EMULATED,
 188         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 189         .proc_name              = DRV_NAME,
 190         .dma_boundary           = ATA_DMA_BOUNDARY,
 191         .slave_configure        = ata_scsi_slave_config,
 192         .slave_destroy          = ata_scsi_slave_destroy,
 193         .bios_param             = ata_std_bios_param,
 194 };
 195
 196 static const struct ata_port_operations pdc_20621_ops = {
 197         .port_disable           = ata_port_disable,
 198         .tf_load                = pdc_tf_load_mmio,
 199         .tf_read                = ata_tf_read,
 200         .check_status           = ata_check_status,
 201         .exec_command           = pdc_exec_command_mmio,
 202         .dev_select             = ata_std_dev_select,
 203         .phy_reset              = pdc_20621_phy_reset,
 204         .qc_prep                = pdc20621_qc_prep,
 205         .qc_issue               = pdc20621_qc_issue_prot,
 206         .data_xfer              = ata_data_xfer,
 207         .eng_timeout            = pdc_eng_timeout,
 208         .irq_handler            = pdc20621_interrupt,
 209         .irq_clear              = pdc20621_irq_clear,
 210         .irq_on                 = ata_irq_on,
 211         .irq_ack                = ata_irq_ack,
 212         .port_start             = pdc_port_start,
 213 };
 214
 215 static const struct ata_port_info pdc_port_info[] = {
 216         /* board_20621 */
 217         {
 218                 .sht            = &pdc_sata_sht,
 219                 .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 220                                   ATA_FLAG_SRST | ATA_FLAG_MMIO |
 221                                   ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING,
 222                 .pio_mask       = 0x1f, /* pio0-4 */
 223                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 224                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 225                 .port_ops       = &pdc_20621_ops,
 226         },
 227
 228 };
 229
 230 static const struct pci_device_id pdc_sata_pci_tbl[] = {
 231         { PCI_VDEVICE(PROMISE, 0x6622), board_20621 },
 232
 233         { }     /* terminate list */
 234 };
 235
 236 static struct pci_driver pdc_sata_pci_driver = {
 237         .name                   = DRV_NAME,
 238         .id_table               = pdc_sata_pci_tbl,
 239         .probe                  = pdc_sata_init_one,
 240         .remove                 = ata_pci_remove_one,
 241 };
 242
 243
 244 static int pdc_port_start(struct ata_port *ap)
 245 {
 246         struct device *dev = ap->host->dev;
 247         struct pdc_port_priv *pp;
 248         int rc;
 249
 250         rc = ata_port_start(ap);
 251         if (rc)
 252                 return rc;
 253
 254         pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
 255         if (!pp)
 256                 return -ENOMEM;
 257
 258         pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
 259         if (!pp->pkt)
 260                 return -ENOMEM;
 261
 262         ap->private_data = pp;
 263
 264         return 0;
 265 }
 266
 267 static void pdc_20621_phy_reset (struct ata_port *ap)
 268 {
 269         VPRINTK("ENTER\n");
 270         ap->cbl = ATA_CBL_SATA;
 271         ata_port_probe(ap);
 272         ata_bus_reset(ap);
 273 }
 274
 275 static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
 276                                            unsigned int portno,
 277                                            unsigned int total_len)
 278 {
 279         u32 addr;
 280         unsigned int dw = PDC_DIMM_APKT_PRD >> 2;
 281         u32 *buf32 = (u32 *) buf;
 282
 283         /* output ATA packet S/G table */
 284         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
 285                (PDC_DIMM_DATA_STEP * portno);
 286         VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr);
 287         buf32[dw] = cpu_to_le32(addr);
 288         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
 289
 290         VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n",
 291                 PDC_20621_DIMM_BASE +
 292                        (PDC_DIMM_WINDOW_STEP * portno) +
 293                        PDC_DIMM_APKT_PRD,
 294                 buf32[dw], buf32[dw + 1]);
 295 }
 296
 297 static inline void pdc20621_host_sg(struct ata_taskfile *tf, u8 *buf,
 298                                             unsigned int portno,
 299                                             unsigned int total_len)
 300 {
 301         u32 addr;
 302         unsigned int dw = PDC_DIMM_HPKT_PRD >> 2;
 303         u32 *buf32 = (u32 *) buf;
 304
 305         /* output Host DMA packet S/G table */
 306         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
 307                (PDC_DIMM_DATA_STEP * portno);
 308
 309         buf32[dw] = cpu_to_le32(addr);
 310         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
 311
 312         VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n",
 313                 PDC_20621_DIMM_BASE +
 314                        (PDC_DIMM_WINDOW_STEP * portno) +
 315                        PDC_DIMM_HPKT_PRD,
 316                 buf32[dw], buf32[dw + 1]);
 317 }
 318
 319 static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf,
 320                                             unsigned int devno, u8 *buf,
 321                                             unsigned int portno)
 322 {
 323         unsigned int i, dw;
 324         u32 *buf32 = (u32 *) buf;
 325         u8 dev_reg;
 326
 327         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
 328                                (PDC_DIMM_WINDOW_STEP * portno) +
 329                                PDC_DIMM_APKT_PRD;
 330         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
 331
 332         i = PDC_DIMM_ATA_PKT;
 333
 334         /*
 335          * Set up ATA packet
 336          */
 337         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
 338                 buf[i++] = PDC_PKT_READ;
 339         else if (tf->protocol == ATA_PROT_NODATA)
 340                 buf[i++] = PDC_PKT_NODATA;
 341         else
 342                 buf[i++] = 0;
 343         buf[i++] = 0;                   /* reserved */
 344         buf[i++] = portno + 1;          /* seq. id */
 345         buf[i++] = 0xff;                /* delay seq. id */
 346
 347         /* dimm dma S/G, and next-pkt */
 348         dw = i >> 2;
 349         if (tf->protocol == ATA_PROT_NODATA)
 350                 buf32[dw] = 0;
 351         else
 352                 buf32[dw] = cpu_to_le32(dimm_sg);
 353         buf32[dw + 1] = 0;
 354         i += 8;
 355
 356         if (devno == 0)
 357                 dev_reg = ATA_DEVICE_OBS;
 358         else
 359                 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
 360
 361         /* select device */
 362         buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
 363         buf[i++] = dev_reg;
 364
 365         /* device control register */
 366         buf[i++] = (1 << 5) | PDC_REG_DEVCTL;
 367         buf[i++] = tf->ctl;
 368
 369         return i;
 370 }
 371
 372 static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf,
 373                                      unsigned int portno)
 374 {
 375         unsigned int dw;
 376         u32 tmp, *buf32 = (u32 *) buf;
 377
 378         unsigned int host_sg = PDC_20621_DIMM_BASE +
 379                                (PDC_DIMM_WINDOW_STEP * portno) +
 380                                PDC_DIMM_HOST_PRD;
 381         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
 382                                (PDC_DIMM_WINDOW_STEP * portno) +
 383                                PDC_DIMM_HPKT_PRD;
 384         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
 385         VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg);
 386
 387         dw = PDC_DIMM_HOST_PKT >> 2;
 388
 389         /*
 390          * Set up Host DMA packet
 391          */
 392         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
 393                 tmp = PDC_PKT_READ;
 394         else
 395                 tmp = 0;
 396         tmp |= ((portno + 1 + 4) << 16);        /* seq. id */
 397         tmp |= (0xff << 24);                    /* delay seq. id */
 398         buf32[dw + 0] = cpu_to_le32(tmp);
 399         buf32[dw + 1] = cpu_to_le32(host_sg);
 400         buf32[dw + 2] = cpu_to_le32(dimm_sg);
 401         buf32[dw + 3] = 0;
 402
 403         VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n",
 404                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) +
 405                         PDC_DIMM_HOST_PKT,
 406                 buf32[dw + 0],
 407                 buf32[dw + 1],
 408                 buf32[dw + 2],
 409                 buf32[dw + 3]);
 410 }
 411
 412 static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
 413 {
 414         struct scatterlist *sg;
 415         struct ata_port *ap = qc->ap;
 416         struct pdc_port_priv *pp = ap->private_data;
 417         void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
 418         void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
 419         unsigned int portno = ap->port_no;
 420         unsigned int i, idx, total_len = 0, sgt_len;
 421         u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
 422
 423         WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
 424
 425         VPRINTK("ata%u: ENTER\n", ap->id);
 426
 427         /* hard-code chip #0 */
 428         mmio += PDC_CHIP0_OFS;
 429
 430         /*
 431          * Build S/G table
 432          */
 433         idx = 0;
 434         ata_for_each_sg(sg, qc) {
 435                 buf[idx++] = cpu_to_le32(sg_dma_address(sg));
 436                 buf[idx++] = cpu_to_le32(sg_dma_len(sg));
 437                 total_len += sg_dma_len(sg);
 438         }
 439         buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
 440         sgt_len = idx * 4;
 441
 442         /*
 443          * Build ATA, host DMA packets
 444          */
 445         pdc20621_host_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
 446         pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno);
 447
 448         pdc20621_ata_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
 449         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
 450
 451         if (qc->tf.flags & ATA_TFLAG_LBA48)
 452                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
 453         else
 454                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
 455
 456         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
 457
 458         /* copy three S/G tables and two packets to DIMM MMIO window */
 459         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
 460                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
 461         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) +
 462                     PDC_DIMM_HOST_PRD,
 463                     &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len);
 464
 465         /* force host FIFO dump */
 466         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
 467
 468         readl(dimm_mmio);       /* MMIO PCI posting flush */
 469
 470         VPRINTK("ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len);
 471 }
 472
 473 static void pdc20621_nodata_prep(struct ata_queued_cmd *qc)
 474 {
 475         struct ata_port *ap = qc->ap;
 476         struct pdc_port_priv *pp = ap->private_data;
 477         void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
 478         void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
 479         unsigned int portno = ap->port_no;
 480         unsigned int i;
 481
 482         VPRINTK("ata%u: ENTER\n", ap->id);
 483
 484         /* hard-code chip #0 */
 485         mmio += PDC_CHIP0_OFS;
 486
 487         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
 488
 489         if (qc->tf.flags & ATA_TFLAG_LBA48)
 490                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
 491         else
 492                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
 493
 494         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
 495
 496         /* copy three S/G tables and two packets to DIMM MMIO window */
 497         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
 498                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
 499
 500         /* force host FIFO dump */
 501         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
 502
 503         readl(dimm_mmio);       /* MMIO PCI posting flush */
 504
 505         VPRINTK("ata pkt buf ofs %u, mmio copied\n", i);
 506 }
 507
 508 static void pdc20621_qc_prep(struct ata_queued_cmd *qc)
 509 {
 510         switch (qc->tf.protocol) {
 511         case ATA_PROT_DMA:
 512                 pdc20621_dma_prep(qc);
 513                 break;
 514         case ATA_PROT_NODATA:
 515                 pdc20621_nodata_prep(qc);
 516                 break;
 517         default:
 518                 break;
 519         }
 520 }
 521
 522 static void __pdc20621_push_hdma(struct ata_queued_cmd *qc,
 523                                  unsigned int seq,
 524                                  u32 pkt_ofs)
 525 {
 526         struct ata_port *ap = qc->ap;
 527         struct ata_host *host = ap->host;
 528         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 529
 530         /* hard-code chip #0 */
 531         mmio += PDC_CHIP0_OFS;
 532
 533         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 534         readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
 535
 536         writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT);
 537         readl(mmio + PDC_HDMA_PKT_SUBMIT);      /* flush */
 538 }
 539
 540 static void pdc20621_push_hdma(struct ata_queued_cmd *qc,
 541                                 unsigned int seq,
 542                                 u32 pkt_ofs)
 543 {
 544         struct ata_port *ap = qc->ap;
 545         struct pdc_host_priv *pp = ap->host->private_data;
 546         unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK;
 547
 548         if (!pp->doing_hdma) {
 549                 __pdc20621_push_hdma(qc, seq, pkt_ofs);
 550                 pp->doing_hdma = 1;
 551                 return;
 552         }
 553
 554         pp->hdma[idx].qc = qc;
 555         pp->hdma[idx].seq = seq;
 556         pp->hdma[idx].pkt_ofs = pkt_ofs;
 557         pp->hdma_prod++;
 558 }
 559
 560 static void pdc20621_pop_hdma(struct ata_queued_cmd *qc)
 561 {
 562         struct ata_port *ap = qc->ap;
 563         struct pdc_host_priv *pp = ap->host->private_data;
 564         unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK;
 565
 566         /* if nothing on queue, we're done */
 567         if (pp->hdma_prod == pp->hdma_cons) {
 568                 pp->doing_hdma = 0;
 569                 return;
 570         }
 571
 572         __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq,
 573                              pp->hdma[idx].pkt_ofs);
 574         pp->hdma_cons++;
 575 }
 576
 577 #ifdef ATA_VERBOSE_DEBUG
 578 static void pdc20621_dump_hdma(struct ata_queued_cmd *qc)
 579 {
 580         struct ata_port *ap = qc->ap;
 581         unsigned int port_no = ap->port_no;
 582         void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
 583
 584         dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP);
 585         dimm_mmio += PDC_DIMM_HOST_PKT;
 586
 587         printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio));
 588         printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4));
 589         printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8));
 590         printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12));
 591 }
 592 #else
 593 static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { }
 594 #endif /* ATA_VERBOSE_DEBUG */
 595
 596 static void pdc20621_packet_start(struct ata_queued_cmd *qc)
 597 {
 598         struct ata_port *ap = qc->ap;
 599         struct ata_host *host = ap->host;
 600         unsigned int port_no = ap->port_no;
 601         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 602         unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
 603         u8 seq = (u8) (port_no + 1);
 604         unsigned int port_ofs;
 605
 606         /* hard-code chip #0 */
 607         mmio += PDC_CHIP0_OFS;
 608
 609         VPRINTK("ata%u: ENTER\n", ap->id);
 610
 611         wmb();                  /* flush PRD, pkt writes */
 612
 613         port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
 614
 615         /* if writing, we (1) DMA to DIMM, then (2) do ATA command */
 616         if (rw && qc->tf.protocol == ATA_PROT_DMA) {
 617                 seq += 4;
 618
 619                 pdc20621_dump_hdma(qc);
 620                 pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT);
 621                 VPRINTK("queued ofs 0x%x (%u), seq %u\n",
 622                         port_ofs + PDC_DIMM_HOST_PKT,
 623                         port_ofs + PDC_DIMM_HOST_PKT,
 624                         seq);
 625         } else {
 626                 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 627                 readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
 628
 629                 writel(port_ofs + PDC_DIMM_ATA_PKT,
 630                        ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 631                 readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 632                 VPRINTK("submitted ofs 0x%x (%u), seq %u\n",
 633                         port_ofs + PDC_DIMM_ATA_PKT,
 634                         port_ofs + PDC_DIMM_ATA_PKT,
 635                         seq);
 636         }
 637 }
 638
 639 static unsigned int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc)
 640 {
 641         switch (qc->tf.protocol) {
 642         case ATA_PROT_DMA:
 643         case ATA_PROT_NODATA:
 644                 pdc20621_packet_start(qc);
 645                 return 0;
 646
 647         case ATA_PROT_ATAPI_DMA:
 648                 BUG();
 649                 break;
 650
 651         default:
 652                 break;
 653         }
 654
 655         return ata_qc_issue_prot(qc);
 656 }
 657
 658 static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
 659                                           struct ata_queued_cmd *qc,
 660                                           unsigned int doing_hdma,
 661                                           void __iomem *mmio)
 662 {
 663         unsigned int port_no = ap->port_no;
 664         unsigned int port_ofs =
 665                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
 666         u8 status;
 667         unsigned int handled = 0;
 668
 669         VPRINTK("ENTER\n");
 670
 671         if ((qc->tf.protocol == ATA_PROT_DMA) &&        /* read */
 672             (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
 673
 674                 /* step two - DMA from DIMM to host */
 675                 if (doing_hdma) {
 676                         VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->id,
 677                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 678                         /* get drive status; clear intr; complete txn */
 679                         qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
 680                         ata_qc_complete(qc);
 681                         pdc20621_pop_hdma(qc);
 682                 }
 683
 684                 /* step one - exec ATA command */
 685                 else {
 686                         u8 seq = (u8) (port_no + 1 + 4);
 687                         VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->id,
 688                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 689
 690                         /* submit hdma pkt */
 691                         pdc20621_dump_hdma(qc);
 692                         pdc20621_push_hdma(qc, seq,
 693                                            port_ofs + PDC_DIMM_HOST_PKT);
 694                 }
 695                 handled = 1;
 696
 697         } else if (qc->tf.protocol == ATA_PROT_DMA) {   /* write */
 698
 699                 /* step one - DMA from host to DIMM */
 700                 if (doing_hdma) {
 701                         u8 seq = (u8) (port_no + 1);
 702                         VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->id,
 703                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 704
 705                         /* submit ata pkt */
 706                         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 707                         readl(mmio + PDC_20621_SEQCTL + (seq * 4));
 708                         writel(port_ofs + PDC_DIMM_ATA_PKT,
 709                                ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 710                         readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 711                 }
 712
 713                 /* step two - execute ATA command */
 714                 else {
 715                         VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->id,
 716                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 717                         /* get drive status; clear intr; complete txn */
 718                         qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
 719                         ata_qc_complete(qc);
 720                         pdc20621_pop_hdma(qc);
 721                 }
 722                 handled = 1;
 723
 724         /* command completion, but no data xfer */
 725         } else if (qc->tf.protocol == ATA_PROT_NODATA) {
 726
 727                 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 728                 DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
 729                 qc->err_mask |= ac_err_mask(status);
 730                 ata_qc_complete(qc);
 731                 handled = 1;
 732
 733         } else {
 734                 ap->stats.idle_irq++;
 735         }
 736
 737         return handled;
 738 }
 739
 740 static void pdc20621_irq_clear(struct ata_port *ap)
 741 {
 742         struct ata_host *host = ap->host;
 743         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 744
 745         mmio += PDC_CHIP0_OFS;
 746
 747         readl(mmio + PDC_20621_SEQMASK);
 748 }
 749
 750 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance)
 751 {
 752         struct ata_host *host = dev_instance;
 753         struct ata_port *ap;
 754         u32 mask = 0;
 755         unsigned int i, tmp, port_no;
 756         unsigned int handled = 0;
 757         void __iomem *mmio_base;
 758
 759         VPRINTK("ENTER\n");
 760
 761         if (!host || !host->iomap[PDC_MMIO_BAR]) {
 762                 VPRINTK("QUICK EXIT\n");
 763                 return IRQ_NONE;
 764         }
 765
 766         mmio_base = host->iomap[PDC_MMIO_BAR];
 767
 768         /* reading should also clear interrupts */
 769         mmio_base += PDC_CHIP0_OFS;
 770         mask = readl(mmio_base + PDC_20621_SEQMASK);
 771         VPRINTK("mask == 0x%x\n", mask);
 772
 773         if (mask == 0xffffffff) {
 774                 VPRINTK("QUICK EXIT 2\n");
 775                 return IRQ_NONE;
 776         }
 777         mask &= 0xffff;         /* only 16 tags possible */
 778         if (!mask) {
 779                 VPRINTK("QUICK EXIT 3\n");
 780                 return IRQ_NONE;
 781         }
 782
 783         spin_lock(&host->lock);
 784
 785         for (i = 1; i < 9; i++) {
 786                 port_no = i - 1;
 787                 if (port_no > 3)
 788                         port_no -= 4;
 789                 if (port_no >= host->n_ports)
 790                         ap = NULL;
 791                 else
 792                         ap = host->ports[port_no];
 793                 tmp = mask & (1 << i);
 794                 VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp);
 795                 if (tmp && ap &&
 796                     !(ap->flags & ATA_FLAG_DISABLED)) {
 797                         struct ata_queued_cmd *qc;
 798
 799                         qc = ata_qc_from_tag(ap, ap->active_tag);
 800                         if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
 801                                 handled += pdc20621_host_intr(ap, qc, (i > 4),
 802                                                               mmio_base);
 803                 }
 804         }
 805
 806         spin_unlock(&host->lock);
 807
 808         VPRINTK("mask == 0x%x\n", mask);
 809
 810         VPRINTK("EXIT\n");
 811
 812         return IRQ_RETVAL(handled);
 813 }
 814
 815 static void pdc_eng_timeout(struct ata_port *ap)
 816 {
 817         u8 drv_stat;
 818         struct ata_host *host = ap->host;
 819         struct ata_queued_cmd *qc;
 820         unsigned long flags;
 821
 822         DPRINTK("ENTER\n");
 823
 824         spin_lock_irqsave(&host->lock, flags);
 825
 826         qc = ata_qc_from_tag(ap, ap->active_tag);
 827
 828         switch (qc->tf.protocol) {
 829         case ATA_PROT_DMA:
 830         case ATA_PROT_NODATA:
 831                 ata_port_printk(ap, KERN_ERR, "command timeout\n");
 832                 qc->err_mask |= __ac_err_mask(ata_wait_idle(ap));
 833                 break;
 834
 835         default:
 836                 drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 837
 838                 ata_port_printk(ap, KERN_ERR,
 839                                 "unknown timeout, cmd 0x%x stat 0x%x\n",
 840                                 qc->tf.command, drv_stat);
 841
 842                 qc->err_mask |= ac_err_mask(drv_stat);
 843                 break;
 844         }
 845
 846         spin_unlock_irqrestore(&host->lock, flags);
 847         ata_eh_qc_complete(qc);
 848         DPRINTK("EXIT\n");
 849 }
 850
 851 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 852 {
 853         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 854                  tf->protocol == ATA_PROT_NODATA);
 855         ata_tf_load(ap, tf);
 856 }
 857
 858
 859 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 860 {
 861         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 862                  tf->protocol == ATA_PROT_NODATA);
 863         ata_exec_command(ap, tf);
 864 }
 865
 866
 867 static void pdc_sata_setup_port(struct ata_ioports *port, void __iomem *base)
 868 {
 869         port->cmd_addr          = base;
 870         port->data_addr         = base;
 871         port->feature_addr      =
 872         port->error_addr        = base + 0x4;
 873         port->nsect_addr        = base + 0x8;
 874         port->lbal_addr         = base + 0xc;
 875         port->lbam_addr         = base + 0x10;
 876         port->lbah_addr         = base + 0x14;
 877         port->device_addr       = base + 0x18;
 878         port->command_addr      =
 879         port->status_addr       = base + 0x1c;
 880         port->altstatus_addr    =
 881         port->ctl_addr          = base + 0x38;
 882 }
 883
 884
 885 #ifdef ATA_VERBOSE_DEBUG
 886 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe, void *psource,
 887                                    u32 offset, u32 size)
 888 {
 889         u32 window_size;
 890         u16 idx;
 891         u8 page_mask;
 892         long dist;
 893         void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
 894         void __iomem *dimm_mmio = pe->iomap[PDC_DIMM_BAR];
 895
 896         /* hard-code chip #0 */
 897         mmio += PDC_CHIP0_OFS;
 898
 899         page_mask = 0x00;
 900         window_size = 0x2000 * 4; /* 32K byte uchar size */
 901         idx = (u16) (offset / window_size);
 902
 903         writel(0x01, mmio + PDC_GENERAL_CTLR);
 904         readl(mmio + PDC_GENERAL_CTLR);
 905         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 906         readl(mmio + PDC_DIMM_WINDOW_CTLR);
 907
 908         offset -= (idx * window_size);
 909         idx++;
 910         dist = ((long) (window_size - (offset + size))) >= 0 ? size :
 911                 (long) (window_size - offset);
 912         memcpy_fromio((char *) psource, (char *) (dimm_mmio + offset / 4),
 913                       dist);
 914
 915         psource += dist;
 916         size -= dist;
 917         for (; (long) size >= (long) window_size ;) {
 918                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 919                 readl(mmio + PDC_GENERAL_CTLR);
 920                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 921                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 922                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
 923                               window_size / 4);
 924                 psource += window_size;
 925                 size -= window_size;
 926                 idx ++;
 927         }
 928
 929         if (size) {
 930                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 931                 readl(mmio + PDC_GENERAL_CTLR);
 932                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 933                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 934                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
 935                               size / 4);
 936         }
 937 }
 938 #endif
 939
 940
 941 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource,
 942                                  u32 offset, u32 size)
 943 {
 944         u32 window_size;
 945         u16 idx;
 946         u8 page_mask;
 947         long dist;
 948         void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
 949         void __iomem *dimm_mmio = pe->iomap[PDC_DIMM_BAR];
 950
 951         /* hard-code chip #0 */
 952         mmio += PDC_CHIP0_OFS;
 953
 954         page_mask = 0x00;
 955         window_size = 0x2000 * 4;       /* 32K byte uchar size */
 956         idx = (u16) (offset / window_size);
 957
 958         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 959         readl(mmio + PDC_DIMM_WINDOW_CTLR);
 960         offset -= (idx * window_size);
 961         idx++;
 962         dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size :
 963                 (long) (window_size - offset);
 964         memcpy_toio(dimm_mmio + offset / 4, psource, dist);
 965         writel(0x01, mmio + PDC_GENERAL_CTLR);
 966         readl(mmio + PDC_GENERAL_CTLR);
 967
 968         psource += dist;
 969         size -= dist;
 970         for (; (long) size >= (long) window_size ;) {
 971                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 972                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 973                 memcpy_toio(dimm_mmio, psource, window_size / 4);
 974                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 975                 readl(mmio + PDC_GENERAL_CTLR);
 976                 psource += window_size;
 977                 size -= window_size;
 978                 idx ++;
 979         }
 980
 981         if (size) {
 982                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 983                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 984                 memcpy_toio(dimm_mmio, psource, size / 4);
 985                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 986                 readl(mmio + PDC_GENERAL_CTLR);
 987         }
 988 }
 989
 990
 991 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe, u32 device,
 992                                       u32 subaddr, u32 *pdata)
 993 {
 994         void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
 995         u32 i2creg  = 0;
 996         u32 status;
 997         u32 count =0;
 998
 999         /* hard-code chip #0 */
1000         mmio += PDC_CHIP0_OFS;
1001
1002         i2creg |= device << 24;
1003         i2creg |= subaddr << 16;
1004
1005         /* Set the device and subaddress */
1006         writel(i2creg, mmio + PDC_I2C_ADDR_DATA_OFFSET);
1007         readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1008
1009         /* Write Control to perform read operation, mask int */
1010         writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT,
1011                mmio + PDC_I2C_CONTROL_OFFSET);
1012
1013         for (count = 0; count <= 1000; count ++) {
1014                 status = readl(mmio + PDC_I2C_CONTROL_OFFSET);
1015                 if (status & PDC_I2C_COMPLETE) {
1016                         status = readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1017                         break;
1018                 } else if (count == 1000)
1019                         return 0;
1020         }
1021
1022         *pdata = (status >> 8) & 0x000000ff;
1023         return 1;
1024 }
1025
1026
1027 static int pdc20621_detect_dimm(struct ata_probe_ent *pe)
1028 {
1029         u32 data=0 ;
1030         if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1031                              PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
1032                 if (data == 100)
1033                         return 100;
1034         } else
1035                 return 0;
1036
1037         if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
1038                 if(data <= 0x75)
1039                         return 133;
1040         } else
1041                 return 0;
1042
1043         return 0;
1044 }
1045
1046
1047 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe)
1048 {
1049         u32 spd0[50];
1050         u32 data = 0;
1051         int size, i;
1052         u8 bdimmsize;
1053         void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
1054         static const struct {
1055                 unsigned int reg;
1056                 unsigned int ofs;
1057         } pdc_i2c_read_data [] = {
1058                 { PDC_DIMM_SPD_TYPE, 11 },
1059                 { PDC_DIMM_SPD_FRESH_RATE, 12 },
1060                 { PDC_DIMM_SPD_COLUMN_NUM, 4 },
1061                 { PDC_DIMM_SPD_ATTRIBUTE, 21 },
1062                 { PDC_DIMM_SPD_ROW_NUM, 3 },
1063                 { PDC_DIMM_SPD_BANK_NUM, 17 },
1064                 { PDC_DIMM_SPD_MODULE_ROW, 5 },
1065                 { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 },
1066                 { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 },
1067                 { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 },
1068                 { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 },
1069                 { PDC_DIMM_SPD_CAS_LATENCY, 18 },
1070         };
1071
1072         /* hard-code chip #0 */
1073         mmio += PDC_CHIP0_OFS;
1074
1075         for(i=0; i<ARRAY_SIZE(pdc_i2c_read_data); i++)
1076                 pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1077                                   pdc_i2c_read_data[i].reg,
1078                                   &spd0[pdc_i2c_read_data[i].ofs]);
1079
1080         data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4);
1081         data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) |
1082                 ((((spd0[27] + 9) / 10) - 1) << 8) ;
1083         data |= (((((spd0[29] > spd0[28])
1084                     ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10;
1085         data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12;
1086
1087         if (spd0[18] & 0x08)
1088                 data |= ((0x03) << 14);
1089         else if (spd0[18] & 0x04)
1090                 data |= ((0x02) << 14);
1091         else if (spd0[18] & 0x01)
1092                 data |= ((0x01) << 14);
1093         else
1094                 data |= (0 << 14);
1095
1096         /*
1097            Calculate the size of bDIMMSize (power of 2) and
1098            merge the DIMM size by program start/end address.
1099         */
1100
1101         bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3;
1102         size = (1 << bdimmsize) >> 20;  /* size = xxx(MB) */
1103         data |= (((size / 16) - 1) << 16);
1104         data |= (0 << 23);
1105         data |= 8;
1106         writel(data, mmio + PDC_DIMM0_CONTROL_OFFSET);
1107         readl(mmio + PDC_DIMM0_CONTROL_OFFSET);
1108         return size;
1109 }
1110
1111
1112 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe)
1113 {
1114         u32 data, spd0;
1115         int error, i;
1116         void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
1117
1118         /* hard-code chip #0 */
1119         mmio += PDC_CHIP0_OFS;
1120
1121         /*
1122           Set To Default : DIMM Module Global Control Register (0x022259F1)
1123           DIMM Arbitration Disable (bit 20)
1124           DIMM Data/Control Output Driving Selection (bit12 - bit15)
1125           Refresh Enable (bit 17)
1126         */
1127
1128         data = 0x022259F1;
1129         writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1130         readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1131
1132         /* Turn on for ECC */
1133         pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1134                           PDC_DIMM_SPD_TYPE, &spd0);
1135         if (spd0 == 0x02) {
1136                 data |= (0x01 << 16);
1137                 writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1138                 readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1139                 printk(KERN_ERR "Local DIMM ECC Enabled\n");
1140         }
1141
1142         /* DIMM Initialization Select/Enable (bit 18/19) */
1143         data &= (~(1<<18));
1144         data |= (1<<19);
1145         writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1146
1147         error = 1;
1148         for (i = 1; i <= 10; i++) {   /* polling ~5 secs */
1149                 data = readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1150                 if (!(data & (1<<19))) {
1151                         error = 0;
1152                         break;
1153                 }
1154                 msleep(i*100);
1155         }
1156         return error;
1157 }
1158
1159
1160 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe)
1161 {
1162         int speed, size, length;
1163         u32 addr,spd0,pci_status;
1164         u32 tmp=0;
1165         u32 time_period=0;
1166         u32 tcount=0;
1167         u32 ticks=0;
1168         u32 clock=0;
1169         u32 fparam=0;
1170         void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
1171
1172         /* hard-code chip #0 */
1173         mmio += PDC_CHIP0_OFS;
1174
1175         /* Initialize PLL based upon PCI Bus Frequency */
1176
1177         /* Initialize Time Period Register */
1178         writel(0xffffffff, mmio + PDC_TIME_PERIOD);
1179         time_period = readl(mmio + PDC_TIME_PERIOD);
1180         VPRINTK("Time Period Register (0x40): 0x%x\n", time_period);
1181
1182         /* Enable timer */
1183         writel(0x00001a0, mmio + PDC_TIME_CONTROL);
1184         readl(mmio + PDC_TIME_CONTROL);
1185
1186         /* Wait 3 seconds */
1187         msleep(3000);
1188
1189         /*
1190            When timer is enabled, counter is decreased every internal
1191            clock cycle.
1192         */
1193
1194         tcount = readl(mmio + PDC_TIME_COUNTER);
1195         VPRINTK("Time Counter Register (0x44): 0x%x\n", tcount);
1196
1197         /*
1198            If SX4 is on PCI-X bus, after 3 seconds, the timer counter
1199            register should be >= (0xffffffff - 3x10^8).
1200         */
1201         if(tcount >= PCI_X_TCOUNT) {
1202                 ticks = (time_period - tcount);
1203                 VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks);
1204
1205                 clock = (ticks / 300000);
1206                 VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock);
1207
1208                 clock = (clock * 33);
1209                 VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock);
1210
1211                 /* PLL F Param (bit 22:16) */
1212                 fparam = (1400000 / clock) - 2;
1213                 VPRINTK("PLL F Param: 0x%x (%d)\n", fparam, fparam);
1214
1215                 /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */
1216                 pci_status = (0x8a001824 | (fparam << 16));
1217         } else
1218                 pci_status = PCI_PLL_INIT;
1219
1220         /* Initialize PLL. */
1221         VPRINTK("pci_status: 0x%x\n", pci_status);
1222         writel(pci_status, mmio + PDC_CTL_STATUS);
1223         readl(mmio + PDC_CTL_STATUS);
1224
1225         /*
1226            Read SPD of DIMM by I2C interface,
1227            and program the DIMM Module Controller.
1228         */
1229         if (!(speed = pdc20621_detect_dimm(pe))) {
1230                 printk(KERN_ERR "Detect Local DIMM Fail\n");
1231                 return 1;       /* DIMM error */
1232         }
1233         VPRINTK("Local DIMM Speed = %d\n", speed);
1234
1235         /* Programming DIMM0 Module Control Register (index_CID0:80h) */
1236         size = pdc20621_prog_dimm0(pe);
1237         VPRINTK("Local DIMM Size = %dMB\n",size);
1238
1239         /* Programming DIMM Module Global Control Register (index_CID0:88h) */
1240         if (pdc20621_prog_dimm_global(pe)) {
1241                 printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
1242                 return 1;
1243         }
1244
1245 #ifdef ATA_VERBOSE_DEBUG
1246         {
1247                 u8 test_parttern1[40] = {0x55,0xAA,'P','r','o','m','i','s','e',' ',
1248                                 'N','o','t',' ','Y','e','t',' ','D','e','f','i','n','e','d',' ',
1249                                  '1','.','1','0',
1250                                 '9','8','0','3','1','6','1','2',0,0};
1251                 u8 test_parttern2[40] = {0};
1252
1253                 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x10040, 40);
1254                 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x40, 40);
1255
1256                 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x10040, 40);
1257                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1258                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1259                        test_parttern2[1], &(test_parttern2[2]));
1260                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x10040,
1261                                        40);
1262                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1263                        test_parttern2[1], &(test_parttern2[2]));
1264
1265                 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x40, 40);
1266                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1267                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1268                        test_parttern2[1], &(test_parttern2[2]));
1269         }
1270 #endif
1271
1272         /* ECC initiliazation. */
1273
1274         pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1275                           PDC_DIMM_SPD_TYPE, &spd0);
1276         if (spd0 == 0x02) {
1277                 VPRINTK("Start ECC initialization\n");
1278                 addr = 0;
1279                 length = size * 1024 * 1024;
1280                 while (addr < length) {
1281                         pdc20621_put_to_dimm(pe, (void *) &tmp, addr,
1282                                              sizeof(u32));
1283                         addr += sizeof(u32);
1284                 }
1285                 VPRINTK("Finish ECC initialization\n");
1286         }
1287         return 0;
1288 }
1289
1290
1291 static void pdc_20621_init(struct ata_probe_ent *pe)
1292 {
1293         u32 tmp;
1294         void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
1295
1296         /* hard-code chip #0 */
1297         mmio += PDC_CHIP0_OFS;
1298
1299         /*
1300          * Select page 0x40 for our 32k DIMM window
1301          */
1302         tmp = readl(mmio + PDC_20621_DIMM_WINDOW) & 0xffff0000;
1303         tmp |= PDC_PAGE_WINDOW; /* page 40h; arbitrarily selected */
1304         writel(tmp, mmio + PDC_20621_DIMM_WINDOW);
1305
1306         /*
1307          * Reset Host DMA
1308          */
1309         tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1310         tmp |= PDC_RESET;
1311         writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1312         readl(mmio + PDC_HDMA_CTLSTAT);         /* flush */
1313
1314         udelay(10);
1315
1316         tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1317         tmp &= ~PDC_RESET;
1318         writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1319         readl(mmio + PDC_HDMA_CTLSTAT);         /* flush */
1320 }
1321
1322 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1323 {
1324         static int printed_version;
1325         struct ata_probe_ent *probe_ent;
1326         void __iomem *base;
1327         struct pdc_host_priv *hpriv;
1328         unsigned int board_idx = (unsigned int) ent->driver_data;
1329         int rc;
1330
1331         if (!printed_version++)
1332                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1333
1334         rc = pcim_enable_device(pdev);
1335         if (rc)
1336                 return rc;
1337
1338         rc = pcim_iomap_regions(pdev, (1 << PDC_MMIO_BAR) | (1 << PDC_DIMM_BAR),
1339                                 DRV_NAME);
1340         if (rc == -EBUSY)
1341                 pcim_pin_device(pdev);
1342         if (rc)
1343                 return rc;
1344
1345         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1346         if (rc)
1347                 return rc;
1348         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1349         if (rc)
1350                 return rc;
1351
1352         probe_ent = devm_kzalloc(&pdev->dev, sizeof(*probe_ent), GFP_KERNEL);
1353         if (probe_ent == NULL)
1354                 return -ENOMEM;
1355
1356         probe_ent->dev = pci_dev_to_dev(pdev);
1357         INIT_LIST_HEAD(&probe_ent->node);
1358
1359         hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
1360         if (!hpriv)
1361                 return -ENOMEM;
1362
1363         probe_ent->sht          = pdc_port_info[board_idx].sht;
1364         probe_ent->port_flags   = pdc_port_info[board_idx].flags;
1365         probe_ent->pio_mask     = pdc_port_info[board_idx].pio_mask;
1366         probe_ent->mwdma_mask   = pdc_port_info[board_idx].mwdma_mask;
1367         probe_ent->udma_mask    = pdc_port_info[board_idx].udma_mask;
1368         probe_ent->port_ops     = pdc_port_info[board_idx].port_ops;
1369
1370         probe_ent->irq = pdev->irq;
1371         probe_ent->irq_flags = IRQF_SHARED;
1372         probe_ent->iomap = pcim_iomap_table(pdev);
1373
1374         probe_ent->private_data = hpriv;
1375         base = probe_ent->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
1376
1377         probe_ent->n_ports = 4;
1378         pdc_sata_setup_port(&probe_ent->port[0], base + 0x200);
1379         pdc_sata_setup_port(&probe_ent->port[1], base + 0x280);
1380         pdc_sata_setup_port(&probe_ent->port[2], base + 0x300);
1381         pdc_sata_setup_port(&probe_ent->port[3], base + 0x380);
1382
1383         pci_set_master(pdev);
1384
1385         /* initialize adapter */
1386         /* initialize local dimm */
1387         if (pdc20621_dimm_init(probe_ent))
1388                 return -ENOMEM;
1389         pdc_20621_init(probe_ent);
1390
1391         if (!ata_device_add(probe_ent))
1392                 return -ENODEV;
1393
1394         devm_kfree(&pdev->dev, probe_ent);
1395         return 0;
1396 }
1397
1398
1399 static int __init pdc_sata_init(void)
1400 {
1401         return pci_register_driver(&pdc_sata_pci_driver);
1402 }
1403
1404
1405 static void __exit pdc_sata_exit(void)
1406 {
1407         pci_unregister_driver(&pdc_sata_pci_driver);
1408 }
1409
1410
1411 MODULE_AUTHOR("Jeff Garzik");
1412 MODULE_DESCRIPTION("Promise SATA low-level driver");
1413 MODULE_LICENSE("GPL");
1414 MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl);
1415 MODULE_VERSION(DRV_VERSION);
1416
1417 module_init(pdc_sata_init);
1418 module_exit(pdc_sata_exit);