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