git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/sata_sx4.c

   1 /*
   2  *  sata_sx4.c - Promise SATA
   3  *
   4  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
   5  *                  Please ALWAYS copy linux-ide@vger.kernel.org
   6  *                  on emails.
   7  *
   8  *  Copyright 2003-2004 Red Hat, Inc.
   9  *
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2, or (at your option)
  14  *  any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; see the file COPYING.  If not, write to
  23  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  *
  26  *  libata documentation is available via 'make {ps|pdf}docs',
  27  *  as Documentation/DocBook/libata.*
  28  *
  29  *  Hardware documentation available under NDA.
  30  *
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/pci.h>
  36 #include <linux/init.h>
  37 #include <linux/blkdev.h>
  38 #include <linux/delay.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/sched.h>
  41 #include <linux/device.h>
  42 #include <scsi/scsi_host.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <linux/libata.h>
  45 #include <asm/io.h>
  46 #include "sata_promise.h"
  47
  48 #define DRV_NAME        "sata_sx4"
  49 #define DRV_VERSION     "0.8"
  50
  51
  52 enum {
  53         PDC_PRD_TBL             = 0x44, /* Direct command DMA table addr */
  54
  55         PDC_PKT_SUBMIT          = 0x40, /* Command packet pointer addr */
  56         PDC_HDMA_PKT_SUBMIT     = 0x100, /* Host DMA packet pointer addr */
  57         PDC_INT_SEQMASK         = 0x40, /* Mask of asserted SEQ INTs */
  58         PDC_HDMA_CTLSTAT        = 0x12C, /* Host DMA control / status */
  59
  60         PDC_20621_SEQCTL        = 0x400,
  61         PDC_20621_SEQMASK       = 0x480,
  62         PDC_20621_GENERAL_CTL   = 0x484,
  63         PDC_20621_PAGE_SIZE     = (32 * 1024),
  64
  65         /* chosen, not constant, values; we design our own DIMM mem map */
  66         PDC_20621_DIMM_WINDOW   = 0x0C, /* page# for 32K DIMM window */
  67         PDC_20621_DIMM_BASE     = 0x00200000,
  68         PDC_20621_DIMM_DATA     = (64 * 1024),
  69         PDC_DIMM_DATA_STEP      = (256 * 1024),
  70         PDC_DIMM_WINDOW_STEP    = (8 * 1024),
  71         PDC_DIMM_HOST_PRD       = (6 * 1024),
  72         PDC_DIMM_HOST_PKT       = (128 * 0),
  73         PDC_DIMM_HPKT_PRD       = (128 * 1),
  74         PDC_DIMM_ATA_PKT        = (128 * 2),
  75         PDC_DIMM_APKT_PRD       = (128 * 3),
  76         PDC_DIMM_HEADER_SZ      = PDC_DIMM_APKT_PRD + 128,
  77         PDC_PAGE_WINDOW         = 0x40,
  78         PDC_PAGE_DATA           = PDC_PAGE_WINDOW +
  79                                   (PDC_20621_DIMM_DATA / PDC_20621_PAGE_SIZE),
  80         PDC_PAGE_SET            = PDC_DIMM_DATA_STEP / PDC_20621_PAGE_SIZE,
  81
  82         PDC_CHIP0_OFS           = 0xC0000, /* offset of chip #0 */
  83
  84         PDC_20621_ERR_MASK      = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
  85                                   (1<<23),
  86
  87         board_20621             = 0,    /* FastTrak S150 SX4 */
  88
  89         PDC_RESET               = (1 << 11), /* HDMA reset */
  90
  91         PDC_MAX_HDMA            = 32,
  92         PDC_HDMA_Q_MASK         = (PDC_MAX_HDMA - 1),
  93
  94         PDC_DIMM0_SPD_DEV_ADDRESS     = 0x50,
  95         PDC_DIMM1_SPD_DEV_ADDRESS     = 0x51,
  96         PDC_MAX_DIMM_MODULE           = 0x02,
  97         PDC_I2C_CONTROL_OFFSET        = 0x48,
  98         PDC_I2C_ADDR_DATA_OFFSET      = 0x4C,
  99         PDC_DIMM0_CONTROL_OFFSET      = 0x80,
 100         PDC_DIMM1_CONTROL_OFFSET      = 0x84,
 101         PDC_SDRAM_CONTROL_OFFSET      = 0x88,
 102         PDC_I2C_WRITE                 = 0x00000000,
 103         PDC_I2C_READ                  = 0x00000040,
 104         PDC_I2C_START                 = 0x00000080,
 105         PDC_I2C_MASK_INT              = 0x00000020,
 106         PDC_I2C_COMPLETE              = 0x00010000,
 107         PDC_I2C_NO_ACK                = 0x00100000,
 108         PDC_DIMM_SPD_SUBADDRESS_START = 0x00,
 109         PDC_DIMM_SPD_SUBADDRESS_END   = 0x7F,
 110         PDC_DIMM_SPD_ROW_NUM          = 3,
 111         PDC_DIMM_SPD_COLUMN_NUM       = 4,
 112         PDC_DIMM_SPD_MODULE_ROW       = 5,
 113         PDC_DIMM_SPD_TYPE             = 11,
 114         PDC_DIMM_SPD_FRESH_RATE       = 12,
 115         PDC_DIMM_SPD_BANK_NUM         = 17,
 116         PDC_DIMM_SPD_CAS_LATENCY      = 18,
 117         PDC_DIMM_SPD_ATTRIBUTE        = 21,
 118         PDC_DIMM_SPD_ROW_PRE_CHARGE   = 27,
 119         PDC_DIMM_SPD_ROW_ACTIVE_DELAY = 28,
 120         PDC_DIMM_SPD_RAS_CAS_DELAY    = 29,
 121         PDC_DIMM_SPD_ACTIVE_PRECHARGE = 30,
 122         PDC_DIMM_SPD_SYSTEM_FREQ      = 126,
 123         PDC_CTL_STATUS                = 0x08,
 124         PDC_DIMM_WINDOW_CTLR          = 0x0C,
 125         PDC_TIME_CONTROL              = 0x3C,
 126         PDC_TIME_PERIOD               = 0x40,
 127         PDC_TIME_COUNTER              = 0x44,
 128         PDC_GENERAL_CTLR              = 0x484,
 129         PCI_PLL_INIT                  = 0x8A531824,
 130         PCI_X_TCOUNT                  = 0xEE1E5CFF
 131 };
 132
 133
 134 struct pdc_port_priv {
 135         u8                      dimm_buf[(ATA_PRD_SZ * ATA_MAX_PRD) + 512];
 136         u8                      *pkt;
 137         dma_addr_t              pkt_dma;
 138 };
 139
 140 struct pdc_host_priv {
 141         void                    __iomem *dimm_mmio;
 142
 143         unsigned int            doing_hdma;
 144         unsigned int            hdma_prod;
 145         unsigned int            hdma_cons;
 146         struct {
 147                 struct ata_queued_cmd *qc;
 148                 unsigned int    seq;
 149                 unsigned long   pkt_ofs;
 150         } hdma[32];
 151 };
 152
 153
 154 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 155 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
 156 static void pdc_eng_timeout(struct ata_port *ap);
 157 static void pdc_20621_phy_reset (struct ata_port *ap);
 158 static int pdc_port_start(struct ata_port *ap);
 159 static void pdc_port_stop(struct ata_port *ap);
 160 static void pdc20621_qc_prep(struct ata_queued_cmd *qc);
 161 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 162 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 163 static void pdc20621_host_stop(struct ata_host_set *host_set);
 164 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe);
 165 static int pdc20621_detect_dimm(struct ata_probe_ent *pe);
 166 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe,
 167                                       u32 device, u32 subaddr, u32 *pdata);
 168 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe);
 169 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe);
 170 #ifdef ATA_VERBOSE_DEBUG
 171 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe,
 172                                    void *psource, u32 offset, u32 size);
 173 #endif
 174 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe,
 175                                  void *psource, u32 offset, u32 size);
 176 static void pdc20621_irq_clear(struct ata_port *ap);
 177 static int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc);
 178
 179
 180 static struct scsi_host_template pdc_sata_sht = {
 181         .module                 = THIS_MODULE,
 182         .name                   = DRV_NAME,
 183         .ioctl                  = ata_scsi_ioctl,
 184         .queuecommand           = ata_scsi_queuecmd,
 185         .eh_strategy_handler    = ata_scsi_error,
 186         .can_queue              = ATA_DEF_QUEUE,
 187         .this_id                = ATA_SHT_THIS_ID,
 188         .sg_tablesize           = LIBATA_MAX_PRD,
 189         .max_sectors            = ATA_MAX_SECTORS,
 190         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 191         .emulated               = ATA_SHT_EMULATED,
 192         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 193         .proc_name              = DRV_NAME,
 194         .dma_boundary           = ATA_DMA_BOUNDARY,
 195         .slave_configure        = ata_scsi_slave_config,
 196         .bios_param             = ata_std_bios_param,
 197         .ordered_flush          = 1,
 198 };
 199
 200 static const struct ata_port_operations pdc_20621_ops = {
 201         .port_disable           = ata_port_disable,
 202         .tf_load                = pdc_tf_load_mmio,
 203         .tf_read                = ata_tf_read,
 204         .check_status           = ata_check_status,
 205         .exec_command           = pdc_exec_command_mmio,
 206         .dev_select             = ata_std_dev_select,
 207         .phy_reset              = pdc_20621_phy_reset,
 208         .qc_prep                = pdc20621_qc_prep,
 209         .qc_issue               = pdc20621_qc_issue_prot,
 210         .eng_timeout            = pdc_eng_timeout,
 211         .irq_handler            = pdc20621_interrupt,
 212         .irq_clear              = pdc20621_irq_clear,
 213         .port_start             = pdc_port_start,
 214         .port_stop              = pdc_port_stop,
 215         .host_stop              = pdc20621_host_stop,
 216 };
 217
 218 static struct ata_port_info pdc_port_info[] = {
 219         /* board_20621 */
 220         {
 221                 .sht            = &pdc_sata_sht,
 222                 .host_flags     = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 223                                   ATA_FLAG_SRST | ATA_FLAG_MMIO,
 224                 .pio_mask       = 0x1f, /* pio0-4 */
 225                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 226                 .udma_mask      = 0x7f, /* udma0-6 ; FIXME */
 227                 .port_ops       = &pdc_20621_ops,
 228         },
 229
 230 };
 231
 232 static const struct pci_device_id pdc_sata_pci_tbl[] = {
 233         { PCI_VENDOR_ID_PROMISE, 0x6622, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 234           board_20621 },
 235         { }     /* terminate list */
 236 };
 237
 238
 239 static struct pci_driver pdc_sata_pci_driver = {
 240         .name                   = DRV_NAME,
 241         .id_table               = pdc_sata_pci_tbl,
 242         .probe                  = pdc_sata_init_one,
 243         .remove                 = ata_pci_remove_one,
 244 };
 245
 246
 247 static void pdc20621_host_stop(struct ata_host_set *host_set)
 248 {
 249         struct pci_dev *pdev = to_pci_dev(host_set->dev);
 250         struct pdc_host_priv *hpriv = host_set->private_data;
 251         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 252
 253         pci_iounmap(pdev, dimm_mmio);
 254         kfree(hpriv);
 255
 256         pci_iounmap(pdev, host_set->mmio_base);
 257 }
 258
 259 static int pdc_port_start(struct ata_port *ap)
 260 {
 261         struct device *dev = ap->host_set->dev;
 262         struct pdc_port_priv *pp;
 263         int rc;
 264
 265         rc = ata_port_start(ap);
 266         if (rc)
 267                 return rc;
 268
 269         pp = kmalloc(sizeof(*pp), GFP_KERNEL);
 270         if (!pp) {
 271                 rc = -ENOMEM;
 272                 goto err_out;
 273         }
 274         memset(pp, 0, sizeof(*pp));
 275
 276         pp->pkt = dma_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
 277         if (!pp->pkt) {
 278                 rc = -ENOMEM;
 279                 goto err_out_kfree;
 280         }
 281
 282         ap->private_data = pp;
 283
 284         return 0;
 285
 286 err_out_kfree:
 287         kfree(pp);
 288 err_out:
 289         ata_port_stop(ap);
 290         return rc;
 291 }
 292
 293
 294 static void pdc_port_stop(struct ata_port *ap)
 295 {
 296         struct device *dev = ap->host_set->dev;
 297         struct pdc_port_priv *pp = ap->private_data;
 298
 299         ap->private_data = NULL;
 300         dma_free_coherent(dev, 128, pp->pkt, pp->pkt_dma);
 301         kfree(pp);
 302         ata_port_stop(ap);
 303 }
 304
 305
 306 static void pdc_20621_phy_reset (struct ata_port *ap)
 307 {
 308         VPRINTK("ENTER\n");
 309         ap->cbl = ATA_CBL_SATA;
 310         ata_port_probe(ap);
 311         ata_bus_reset(ap);
 312 }
 313
 314 static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
 315                                            unsigned int portno,
 316                                            unsigned int total_len)
 317 {
 318         u32 addr;
 319         unsigned int dw = PDC_DIMM_APKT_PRD >> 2;
 320         u32 *buf32 = (u32 *) buf;
 321
 322         /* output ATA packet S/G table */
 323         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
 324                (PDC_DIMM_DATA_STEP * portno);
 325         VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr);
 326         buf32[dw] = cpu_to_le32(addr);
 327         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
 328
 329         VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n",
 330                 PDC_20621_DIMM_BASE +
 331                        (PDC_DIMM_WINDOW_STEP * portno) +
 332                        PDC_DIMM_APKT_PRD,
 333                 buf32[dw], buf32[dw + 1]);
 334 }
 335
 336 static inline void pdc20621_host_sg(struct ata_taskfile *tf, u8 *buf,
 337                                             unsigned int portno,
 338                                             unsigned int total_len)
 339 {
 340         u32 addr;
 341         unsigned int dw = PDC_DIMM_HPKT_PRD >> 2;
 342         u32 *buf32 = (u32 *) buf;
 343
 344         /* output Host DMA packet S/G table */
 345         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
 346                (PDC_DIMM_DATA_STEP * portno);
 347
 348         buf32[dw] = cpu_to_le32(addr);
 349         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
 350
 351         VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n",
 352                 PDC_20621_DIMM_BASE +
 353                        (PDC_DIMM_WINDOW_STEP * portno) +
 354                        PDC_DIMM_HPKT_PRD,
 355                 buf32[dw], buf32[dw + 1]);
 356 }
 357
 358 static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf,
 359                                             unsigned int devno, u8 *buf,
 360                                             unsigned int portno)
 361 {
 362         unsigned int i, dw;
 363         u32 *buf32 = (u32 *) buf;
 364         u8 dev_reg;
 365
 366         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
 367                                (PDC_DIMM_WINDOW_STEP * portno) +
 368                                PDC_DIMM_APKT_PRD;
 369         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
 370
 371         i = PDC_DIMM_ATA_PKT;
 372
 373         /*
 374          * Set up ATA packet
 375          */
 376         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
 377                 buf[i++] = PDC_PKT_READ;
 378         else if (tf->protocol == ATA_PROT_NODATA)
 379                 buf[i++] = PDC_PKT_NODATA;
 380         else
 381                 buf[i++] = 0;
 382         buf[i++] = 0;                   /* reserved */
 383         buf[i++] = portno + 1;          /* seq. id */
 384         buf[i++] = 0xff;                /* delay seq. id */
 385
 386         /* dimm dma S/G, and next-pkt */
 387         dw = i >> 2;
 388         if (tf->protocol == ATA_PROT_NODATA)
 389                 buf32[dw] = 0;
 390         else
 391                 buf32[dw] = cpu_to_le32(dimm_sg);
 392         buf32[dw + 1] = 0;
 393         i += 8;
 394
 395         if (devno == 0)
 396                 dev_reg = ATA_DEVICE_OBS;
 397         else
 398                 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
 399
 400         /* select device */
 401         buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
 402         buf[i++] = dev_reg;
 403
 404         /* device control register */
 405         buf[i++] = (1 << 5) | PDC_REG_DEVCTL;
 406         buf[i++] = tf->ctl;
 407
 408         return i;
 409 }
 410
 411 static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf,
 412                                      unsigned int portno)
 413 {
 414         unsigned int dw;
 415         u32 tmp, *buf32 = (u32 *) buf;
 416
 417         unsigned int host_sg = PDC_20621_DIMM_BASE +
 418                                (PDC_DIMM_WINDOW_STEP * portno) +
 419                                PDC_DIMM_HOST_PRD;
 420         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
 421                                (PDC_DIMM_WINDOW_STEP * portno) +
 422                                PDC_DIMM_HPKT_PRD;
 423         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
 424         VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg);
 425
 426         dw = PDC_DIMM_HOST_PKT >> 2;
 427
 428         /*
 429          * Set up Host DMA packet
 430          */
 431         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
 432                 tmp = PDC_PKT_READ;
 433         else
 434                 tmp = 0;
 435         tmp |= ((portno + 1 + 4) << 16);        /* seq. id */
 436         tmp |= (0xff << 24);                    /* delay seq. id */
 437         buf32[dw + 0] = cpu_to_le32(tmp);
 438         buf32[dw + 1] = cpu_to_le32(host_sg);
 439         buf32[dw + 2] = cpu_to_le32(dimm_sg);
 440         buf32[dw + 3] = 0;
 441
 442         VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n",
 443                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) +
 444                         PDC_DIMM_HOST_PKT,
 445                 buf32[dw + 0],
 446                 buf32[dw + 1],
 447                 buf32[dw + 2],
 448                 buf32[dw + 3]);
 449 }
 450
 451 static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
 452 {
 453         struct scatterlist *sg;
 454         struct ata_port *ap = qc->ap;
 455         struct pdc_port_priv *pp = ap->private_data;
 456         void __iomem *mmio = ap->host_set->mmio_base;
 457         struct pdc_host_priv *hpriv = ap->host_set->private_data;
 458         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 459         unsigned int portno = ap->port_no;
 460         unsigned int i, idx, total_len = 0, sgt_len;
 461         u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
 462
 463         assert(qc->flags & ATA_QCFLAG_DMAMAP);
 464
 465         VPRINTK("ata%u: ENTER\n", ap->id);
 466
 467         /* hard-code chip #0 */
 468         mmio += PDC_CHIP0_OFS;
 469
 470         /*
 471          * Build S/G table
 472          */
 473         idx = 0;
 474         ata_for_each_sg(sg, qc) {
 475                 buf[idx++] = cpu_to_le32(sg_dma_address(sg));
 476                 buf[idx++] = cpu_to_le32(sg_dma_len(sg));
 477                 total_len += sg_dma_len(sg);
 478         }
 479         buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
 480         sgt_len = idx * 4;
 481
 482         /*
 483          * Build ATA, host DMA packets
 484          */
 485         pdc20621_host_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
 486         pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno);
 487
 488         pdc20621_ata_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
 489         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
 490
 491         if (qc->tf.flags & ATA_TFLAG_LBA48)
 492                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
 493         else
 494                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
 495
 496         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
 497
 498         /* copy three S/G tables and two packets to DIMM MMIO window */
 499         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
 500                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
 501         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) +
 502                     PDC_DIMM_HOST_PRD,
 503                     &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len);
 504
 505         /* force host FIFO dump */
 506         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
 507
 508         readl(dimm_mmio);       /* MMIO PCI posting flush */
 509
 510         VPRINTK("ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len);
 511 }
 512
 513 static void pdc20621_nodata_prep(struct ata_queued_cmd *qc)
 514 {
 515         struct ata_port *ap = qc->ap;
 516         struct pdc_port_priv *pp = ap->private_data;
 517         void __iomem *mmio = ap->host_set->mmio_base;
 518         struct pdc_host_priv *hpriv = ap->host_set->private_data;
 519         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 520         unsigned int portno = ap->port_no;
 521         unsigned int i;
 522
 523         VPRINTK("ata%u: ENTER\n", ap->id);
 524
 525         /* hard-code chip #0 */
 526         mmio += PDC_CHIP0_OFS;
 527
 528         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
 529
 530         if (qc->tf.flags & ATA_TFLAG_LBA48)
 531                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
 532         else
 533                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
 534
 535         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
 536
 537         /* copy three S/G tables and two packets to DIMM MMIO window */
 538         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
 539                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
 540
 541         /* force host FIFO dump */
 542         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
 543
 544         readl(dimm_mmio);       /* MMIO PCI posting flush */
 545
 546         VPRINTK("ata pkt buf ofs %u, mmio copied\n", i);
 547 }
 548
 549 static void pdc20621_qc_prep(struct ata_queued_cmd *qc)
 550 {
 551         switch (qc->tf.protocol) {
 552         case ATA_PROT_DMA:
 553                 pdc20621_dma_prep(qc);
 554                 break;
 555         case ATA_PROT_NODATA:
 556                 pdc20621_nodata_prep(qc);
 557                 break;
 558         default:
 559                 break;
 560         }
 561 }
 562
 563 static void __pdc20621_push_hdma(struct ata_queued_cmd *qc,
 564                                  unsigned int seq,
 565                                  u32 pkt_ofs)
 566 {
 567         struct ata_port *ap = qc->ap;
 568         struct ata_host_set *host_set = ap->host_set;
 569         void __iomem *mmio = host_set->mmio_base;
 570
 571         /* hard-code chip #0 */
 572         mmio += PDC_CHIP0_OFS;
 573
 574         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 575         readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
 576
 577         writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT);
 578         readl(mmio + PDC_HDMA_PKT_SUBMIT);      /* flush */
 579 }
 580
 581 static void pdc20621_push_hdma(struct ata_queued_cmd *qc,
 582                                 unsigned int seq,
 583                                 u32 pkt_ofs)
 584 {
 585         struct ata_port *ap = qc->ap;
 586         struct pdc_host_priv *pp = ap->host_set->private_data;
 587         unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK;
 588
 589         if (!pp->doing_hdma) {
 590                 __pdc20621_push_hdma(qc, seq, pkt_ofs);
 591                 pp->doing_hdma = 1;
 592                 return;
 593         }
 594
 595         pp->hdma[idx].qc = qc;
 596         pp->hdma[idx].seq = seq;
 597         pp->hdma[idx].pkt_ofs = pkt_ofs;
 598         pp->hdma_prod++;
 599 }
 600
 601 static void pdc20621_pop_hdma(struct ata_queued_cmd *qc)
 602 {
 603         struct ata_port *ap = qc->ap;
 604         struct pdc_host_priv *pp = ap->host_set->private_data;
 605         unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK;
 606
 607         /* if nothing on queue, we're done */
 608         if (pp->hdma_prod == pp->hdma_cons) {
 609                 pp->doing_hdma = 0;
 610                 return;
 611         }
 612
 613         __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq,
 614                              pp->hdma[idx].pkt_ofs);
 615         pp->hdma_cons++;
 616 }
 617
 618 #ifdef ATA_VERBOSE_DEBUG
 619 static void pdc20621_dump_hdma(struct ata_queued_cmd *qc)
 620 {
 621         struct ata_port *ap = qc->ap;
 622         unsigned int port_no = ap->port_no;
 623         struct pdc_host_priv *hpriv = ap->host_set->private_data;
 624         void *dimm_mmio = hpriv->dimm_mmio;
 625
 626         dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP);
 627         dimm_mmio += PDC_DIMM_HOST_PKT;
 628
 629         printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio));
 630         printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4));
 631         printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8));
 632         printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12));
 633 }
 634 #else
 635 static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { }
 636 #endif /* ATA_VERBOSE_DEBUG */
 637
 638 static void pdc20621_packet_start(struct ata_queued_cmd *qc)
 639 {
 640         struct ata_port *ap = qc->ap;
 641         struct ata_host_set *host_set = ap->host_set;
 642         unsigned int port_no = ap->port_no;
 643         void __iomem *mmio = host_set->mmio_base;
 644         unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
 645         u8 seq = (u8) (port_no + 1);
 646         unsigned int port_ofs;
 647
 648         /* hard-code chip #0 */
 649         mmio += PDC_CHIP0_OFS;
 650
 651         VPRINTK("ata%u: ENTER\n", ap->id);
 652
 653         wmb();                  /* flush PRD, pkt writes */
 654
 655         port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
 656
 657         /* if writing, we (1) DMA to DIMM, then (2) do ATA command */
 658         if (rw && qc->tf.protocol == ATA_PROT_DMA) {
 659                 seq += 4;
 660
 661                 pdc20621_dump_hdma(qc);
 662                 pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT);
 663                 VPRINTK("queued ofs 0x%x (%u), seq %u\n",
 664                         port_ofs + PDC_DIMM_HOST_PKT,
 665                         port_ofs + PDC_DIMM_HOST_PKT,
 666                         seq);
 667         } else {
 668                 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 669                 readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
 670
 671                 writel(port_ofs + PDC_DIMM_ATA_PKT,
 672                        (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 673                 readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 674                 VPRINTK("submitted ofs 0x%x (%u), seq %u\n",
 675                         port_ofs + PDC_DIMM_ATA_PKT,
 676                         port_ofs + PDC_DIMM_ATA_PKT,
 677                         seq);
 678         }
 679 }
 680
 681 static int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc)
 682 {
 683         switch (qc->tf.protocol) {
 684         case ATA_PROT_DMA:
 685         case ATA_PROT_NODATA:
 686                 pdc20621_packet_start(qc);
 687                 return 0;
 688
 689         case ATA_PROT_ATAPI_DMA:
 690                 BUG();
 691                 break;
 692
 693         default:
 694                 break;
 695         }
 696
 697         return ata_qc_issue_prot(qc);
 698 }
 699
 700 static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
 701                                           struct ata_queued_cmd *qc,
 702                                           unsigned int doing_hdma,
 703                                           void __iomem *mmio)
 704 {
 705         unsigned int port_no = ap->port_no;
 706         unsigned int port_ofs =
 707                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
 708         u8 status;
 709         unsigned int handled = 0;
 710
 711         VPRINTK("ENTER\n");
 712
 713         if ((qc->tf.protocol == ATA_PROT_DMA) &&        /* read */
 714             (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
 715
 716                 /* step two - DMA from DIMM to host */
 717                 if (doing_hdma) {
 718                         VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->id,
 719                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 720                         /* get drive status; clear intr; complete txn */
 721                         ata_qc_complete(qc, ac_err_mask(ata_wait_idle(ap)));
 722                         pdc20621_pop_hdma(qc);
 723                 }
 724
 725                 /* step one - exec ATA command */
 726                 else {
 727                         u8 seq = (u8) (port_no + 1 + 4);
 728                         VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->id,
 729                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 730
 731                         /* submit hdma pkt */
 732                         pdc20621_dump_hdma(qc);
 733                         pdc20621_push_hdma(qc, seq,
 734                                            port_ofs + PDC_DIMM_HOST_PKT);
 735                 }
 736                 handled = 1;
 737
 738         } else if (qc->tf.protocol == ATA_PROT_DMA) {   /* write */
 739
 740                 /* step one - DMA from host to DIMM */
 741                 if (doing_hdma) {
 742                         u8 seq = (u8) (port_no + 1);
 743                         VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->id,
 744                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 745
 746                         /* submit ata pkt */
 747                         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
 748                         readl(mmio + PDC_20621_SEQCTL + (seq * 4));
 749                         writel(port_ofs + PDC_DIMM_ATA_PKT,
 750                                (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 751                         readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
 752                 }
 753
 754                 /* step two - execute ATA command */
 755                 else {
 756                         VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->id,
 757                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
 758                         /* get drive status; clear intr; complete txn */
 759                         ata_qc_complete(qc, ac_err_mask(ata_wait_idle(ap)));
 760                         pdc20621_pop_hdma(qc);
 761                 }
 762                 handled = 1;
 763
 764         /* command completion, but no data xfer */
 765         } else if (qc->tf.protocol == ATA_PROT_NODATA) {
 766
 767                 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 768                 DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
 769                 ata_qc_complete(qc, ac_err_mask(status));
 770                 handled = 1;
 771
 772         } else {
 773                 ap->stats.idle_irq++;
 774         }
 775
 776         return handled;
 777 }
 778
 779 static void pdc20621_irq_clear(struct ata_port *ap)
 780 {
 781         struct ata_host_set *host_set = ap->host_set;
 782         void __iomem *mmio = host_set->mmio_base;
 783
 784         mmio += PDC_CHIP0_OFS;
 785
 786         readl(mmio + PDC_20621_SEQMASK);
 787 }
 788
 789 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
 790 {
 791         struct ata_host_set *host_set = dev_instance;
 792         struct ata_port *ap;
 793         u32 mask = 0;
 794         unsigned int i, tmp, port_no;
 795         unsigned int handled = 0;
 796         void __iomem *mmio_base;
 797
 798         VPRINTK("ENTER\n");
 799
 800         if (!host_set || !host_set->mmio_base) {
 801                 VPRINTK("QUICK EXIT\n");
 802                 return IRQ_NONE;
 803         }
 804
 805         mmio_base = host_set->mmio_base;
 806
 807         /* reading should also clear interrupts */
 808         mmio_base += PDC_CHIP0_OFS;
 809         mask = readl(mmio_base + PDC_20621_SEQMASK);
 810         VPRINTK("mask == 0x%x\n", mask);
 811
 812         if (mask == 0xffffffff) {
 813                 VPRINTK("QUICK EXIT 2\n");
 814                 return IRQ_NONE;
 815         }
 816         mask &= 0xffff;         /* only 16 tags possible */
 817         if (!mask) {
 818                 VPRINTK("QUICK EXIT 3\n");
 819                 return IRQ_NONE;
 820         }
 821
 822         spin_lock(&host_set->lock);
 823
 824         for (i = 1; i < 9; i++) {
 825                 port_no = i - 1;
 826                 if (port_no > 3)
 827                         port_no -= 4;
 828                 if (port_no >= host_set->n_ports)
 829                         ap = NULL;
 830                 else
 831                         ap = host_set->ports[port_no];
 832                 tmp = mask & (1 << i);
 833                 VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp);
 834                 if (tmp && ap &&
 835                     !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
 836                         struct ata_queued_cmd *qc;
 837
 838                         qc = ata_qc_from_tag(ap, ap->active_tag);
 839                         if (qc && (!(qc->tf.ctl & ATA_NIEN)))
 840                                 handled += pdc20621_host_intr(ap, qc, (i > 4),
 841                                                               mmio_base);
 842                 }
 843         }
 844
 845         spin_unlock(&host_set->lock);
 846
 847         VPRINTK("mask == 0x%x\n", mask);
 848
 849         VPRINTK("EXIT\n");
 850
 851         return IRQ_RETVAL(handled);
 852 }
 853
 854 static void pdc_eng_timeout(struct ata_port *ap)
 855 {
 856         u8 drv_stat;
 857         struct ata_host_set *host_set = ap->host_set;
 858         struct ata_queued_cmd *qc;
 859         unsigned long flags;
 860
 861         DPRINTK("ENTER\n");
 862
 863         spin_lock_irqsave(&host_set->lock, flags);
 864
 865         qc = ata_qc_from_tag(ap, ap->active_tag);
 866         if (!qc) {
 867                 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
 868                        ap->id);
 869                 goto out;
 870         }
 871
 872         /* hack alert!  We cannot use the supplied completion
 873          * function from inside the ->eh_strategy_handler() thread.
 874          * libata is the only user of ->eh_strategy_handler() in
 875          * any kernel, so the default scsi_done() assumes it is
 876          * not being called from the SCSI EH.
 877          */
 878         qc->scsidone = scsi_finish_command;
 879
 880         switch (qc->tf.protocol) {
 881         case ATA_PROT_DMA:
 882         case ATA_PROT_NODATA:
 883                 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
 884                 ata_qc_complete(qc, __ac_err_mask(ata_wait_idle(ap)));
 885                 break;
 886
 887         default:
 888                 drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
 889
 890                 printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n",
 891                        ap->id, qc->tf.command, drv_stat);
 892
 893                 ata_qc_complete(qc, ac_err_mask(drv_stat));
 894                 break;
 895         }
 896
 897 out:
 898         spin_unlock_irqrestore(&host_set->lock, flags);
 899         DPRINTK("EXIT\n");
 900 }
 901
 902 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 903 {
 904         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 905                  tf->protocol == ATA_PROT_NODATA);
 906         ata_tf_load(ap, tf);
 907 }
 908
 909
 910 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
 911 {
 912         WARN_ON (tf->protocol == ATA_PROT_DMA ||
 913                  tf->protocol == ATA_PROT_NODATA);
 914         ata_exec_command(ap, tf);
 915 }
 916
 917
 918 static void pdc_sata_setup_port(struct ata_ioports *port, unsigned long base)
 919 {
 920         port->cmd_addr          = base;
 921         port->data_addr         = base;
 922         port->feature_addr      =
 923         port->error_addr        = base + 0x4;
 924         port->nsect_addr        = base + 0x8;
 925         port->lbal_addr         = base + 0xc;
 926         port->lbam_addr         = base + 0x10;
 927         port->lbah_addr         = base + 0x14;
 928         port->device_addr       = base + 0x18;
 929         port->command_addr      =
 930         port->status_addr       = base + 0x1c;
 931         port->altstatus_addr    =
 932         port->ctl_addr          = base + 0x38;
 933 }
 934
 935
 936 #ifdef ATA_VERBOSE_DEBUG
 937 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe, void *psource,
 938                                    u32 offset, u32 size)
 939 {
 940         u32 window_size;
 941         u16 idx;
 942         u8 page_mask;
 943         long dist;
 944         void __iomem *mmio = pe->mmio_base;
 945         struct pdc_host_priv *hpriv = pe->private_data;
 946         void __iomem *dimm_mmio = hpriv->dimm_mmio;
 947
 948         /* hard-code chip #0 */
 949         mmio += PDC_CHIP0_OFS;
 950
 951         page_mask = 0x00;
 952         window_size = 0x2000 * 4; /* 32K byte uchar size */
 953         idx = (u16) (offset / window_size);
 954
 955         writel(0x01, mmio + PDC_GENERAL_CTLR);
 956         readl(mmio + PDC_GENERAL_CTLR);
 957         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 958         readl(mmio + PDC_DIMM_WINDOW_CTLR);
 959
 960         offset -= (idx * window_size);
 961         idx++;
 962         dist = ((long) (window_size - (offset + size))) >= 0 ? size :
 963                 (long) (window_size - offset);
 964         memcpy_fromio((char *) psource, (char *) (dimm_mmio + offset / 4),
 965                       dist);
 966
 967         psource += dist;
 968         size -= dist;
 969         for (; (long) size >= (long) window_size ;) {
 970                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 971                 readl(mmio + PDC_GENERAL_CTLR);
 972                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 973                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 974                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
 975                               window_size / 4);
 976                 psource += window_size;
 977                 size -= window_size;
 978                 idx ++;
 979         }
 980
 981         if (size) {
 982                 writel(0x01, mmio + PDC_GENERAL_CTLR);
 983                 readl(mmio + PDC_GENERAL_CTLR);
 984                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
 985                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
 986                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
 987                               size / 4);
 988         }
 989 }
 990 #endif
 991
 992
 993 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource,
 994                                  u32 offset, u32 size)
 995 {
 996         u32 window_size;
 997         u16 idx;
 998         u8 page_mask;
 999         long dist;
1000         void __iomem *mmio = pe->mmio_base;
1001         struct pdc_host_priv *hpriv = pe->private_data;
1002         void __iomem *dimm_mmio = hpriv->dimm_mmio;
1003
1004         /* hard-code chip #0 */
1005         mmio += PDC_CHIP0_OFS;
1006
1007         page_mask = 0x00;
1008         window_size = 0x2000 * 4;       /* 32K byte uchar size */
1009         idx = (u16) (offset / window_size);
1010
1011         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1012         readl(mmio + PDC_DIMM_WINDOW_CTLR);
1013         offset -= (idx * window_size);
1014         idx++;
1015         dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size :
1016                 (long) (window_size - offset);
1017         memcpy_toio(dimm_mmio + offset / 4, psource, dist);
1018         writel(0x01, mmio + PDC_GENERAL_CTLR);
1019         readl(mmio + PDC_GENERAL_CTLR);
1020
1021         psource += dist;
1022         size -= dist;
1023         for (; (long) size >= (long) window_size ;) {
1024                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1025                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1026                 memcpy_toio(dimm_mmio, psource, window_size / 4);
1027                 writel(0x01, mmio + PDC_GENERAL_CTLR);
1028                 readl(mmio + PDC_GENERAL_CTLR);
1029                 psource += window_size;
1030                 size -= window_size;
1031                 idx ++;
1032         }
1033
1034         if (size) {
1035                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1036                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1037                 memcpy_toio(dimm_mmio, psource, size / 4);
1038                 writel(0x01, mmio + PDC_GENERAL_CTLR);
1039                 readl(mmio + PDC_GENERAL_CTLR);
1040         }
1041 }
1042
1043
1044 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe, u32 device,
1045                                       u32 subaddr, u32 *pdata)
1046 {
1047         void __iomem *mmio = pe->mmio_base;
1048         u32 i2creg  = 0;
1049         u32 status;
1050         u32 count =0;
1051
1052         /* hard-code chip #0 */
1053         mmio += PDC_CHIP0_OFS;
1054
1055         i2creg |= device << 24;
1056         i2creg |= subaddr << 16;
1057
1058         /* Set the device and subaddress */
1059         writel(i2creg, mmio + PDC_I2C_ADDR_DATA_OFFSET);
1060         readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1061
1062         /* Write Control to perform read operation, mask int */
1063         writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT,
1064                mmio + PDC_I2C_CONTROL_OFFSET);
1065
1066         for (count = 0; count <= 1000; count ++) {
1067                 status = readl(mmio + PDC_I2C_CONTROL_OFFSET);
1068                 if (status & PDC_I2C_COMPLETE) {
1069                         status = readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1070                         break;
1071                 } else if (count == 1000)
1072                         return 0;
1073         }
1074
1075         *pdata = (status >> 8) & 0x000000ff;
1076         return 1;
1077 }
1078
1079
1080 static int pdc20621_detect_dimm(struct ata_probe_ent *pe)
1081 {
1082         u32 data=0 ;
1083         if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1084                              PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
1085                 if (data == 100)
1086                         return 100;
1087         } else
1088                 return 0;
1089
1090         if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
1091                 if(data <= 0x75)
1092                         return 133;
1093         } else
1094                 return 0;
1095
1096         return 0;
1097 }
1098
1099
1100 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe)
1101 {
1102         u32 spd0[50];
1103         u32 data = 0;
1104         int size, i;
1105         u8 bdimmsize;
1106         void __iomem *mmio = pe->mmio_base;
1107         static const struct {
1108                 unsigned int reg;
1109                 unsigned int ofs;
1110         } pdc_i2c_read_data [] = {
1111                 { PDC_DIMM_SPD_TYPE, 11 },
1112                 { PDC_DIMM_SPD_FRESH_RATE, 12 },
1113                 { PDC_DIMM_SPD_COLUMN_NUM, 4 },
1114                 { PDC_DIMM_SPD_ATTRIBUTE, 21 },
1115                 { PDC_DIMM_SPD_ROW_NUM, 3 },
1116                 { PDC_DIMM_SPD_BANK_NUM, 17 },
1117                 { PDC_DIMM_SPD_MODULE_ROW, 5 },
1118                 { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 },
1119                 { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 },
1120                 { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 },
1121                 { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 },
1122                 { PDC_DIMM_SPD_CAS_LATENCY, 18 },
1123         };
1124
1125         /* hard-code chip #0 */
1126         mmio += PDC_CHIP0_OFS;
1127
1128         for(i=0; i<ARRAY_SIZE(pdc_i2c_read_data); i++)
1129                 pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1130                                   pdc_i2c_read_data[i].reg,
1131                                   &spd0[pdc_i2c_read_data[i].ofs]);
1132
1133         data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4);
1134         data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) |
1135                 ((((spd0[27] + 9) / 10) - 1) << 8) ;
1136         data |= (((((spd0[29] > spd0[28])
1137                     ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10;
1138         data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12;
1139
1140         if (spd0[18] & 0x08)
1141                 data |= ((0x03) << 14);
1142         else if (spd0[18] & 0x04)
1143                 data |= ((0x02) << 14);
1144         else if (spd0[18] & 0x01)
1145                 data |= ((0x01) << 14);
1146         else
1147                 data |= (0 << 14);
1148
1149         /*
1150            Calculate the size of bDIMMSize (power of 2) and
1151            merge the DIMM size by program start/end address.
1152         */
1153
1154         bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3;
1155         size = (1 << bdimmsize) >> 20;  /* size = xxx(MB) */
1156         data |= (((size / 16) - 1) << 16);
1157         data |= (0 << 23);
1158         data |= 8;
1159         writel(data, mmio + PDC_DIMM0_CONTROL_OFFSET);
1160         readl(mmio + PDC_DIMM0_CONTROL_OFFSET);
1161         return size;
1162 }
1163
1164
1165 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe)
1166 {
1167         u32 data, spd0;
1168         int error, i;
1169         void __iomem *mmio = pe->mmio_base;
1170
1171         /* hard-code chip #0 */
1172         mmio += PDC_CHIP0_OFS;
1173
1174         /*
1175           Set To Default : DIMM Module Global Control Register (0x022259F1)
1176           DIMM Arbitration Disable (bit 20)
1177           DIMM Data/Control Output Driving Selection (bit12 - bit15)
1178           Refresh Enable (bit 17)
1179         */
1180
1181         data = 0x022259F1;
1182         writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1183         readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1184
1185         /* Turn on for ECC */
1186         pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1187                           PDC_DIMM_SPD_TYPE, &spd0);
1188         if (spd0 == 0x02) {
1189                 data |= (0x01 << 16);
1190                 writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1191                 readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1192                 printk(KERN_ERR "Local DIMM ECC Enabled\n");
1193         }
1194
1195         /* DIMM Initialization Select/Enable (bit 18/19) */
1196         data &= (~(1<<18));
1197         data |= (1<<19);
1198         writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1199
1200         error = 1;
1201         for (i = 1; i <= 10; i++) {   /* polling ~5 secs */
1202                 data = readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1203                 if (!(data & (1<<19))) {
1204                         error = 0;
1205                         break;
1206                 }
1207                 msleep(i*100);
1208         }
1209         return error;
1210 }
1211
1212
1213 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe)
1214 {
1215         int speed, size, length;
1216         u32 addr,spd0,pci_status;
1217         u32 tmp=0;
1218         u32 time_period=0;
1219         u32 tcount=0;
1220         u32 ticks=0;
1221         u32 clock=0;
1222         u32 fparam=0;
1223         void __iomem *mmio = pe->mmio_base;
1224
1225         /* hard-code chip #0 */
1226         mmio += PDC_CHIP0_OFS;
1227
1228         /* Initialize PLL based upon PCI Bus Frequency */
1229
1230         /* Initialize Time Period Register */
1231         writel(0xffffffff, mmio + PDC_TIME_PERIOD);
1232         time_period = readl(mmio + PDC_TIME_PERIOD);
1233         VPRINTK("Time Period Register (0x40): 0x%x\n", time_period);
1234
1235         /* Enable timer */
1236         writel(0x00001a0, mmio + PDC_TIME_CONTROL);
1237         readl(mmio + PDC_TIME_CONTROL);
1238
1239         /* Wait 3 seconds */
1240         msleep(3000);
1241
1242         /*
1243            When timer is enabled, counter is decreased every internal
1244            clock cycle.
1245         */
1246
1247         tcount = readl(mmio + PDC_TIME_COUNTER);
1248         VPRINTK("Time Counter Register (0x44): 0x%x\n", tcount);
1249
1250         /*
1251            If SX4 is on PCI-X bus, after 3 seconds, the timer counter
1252            register should be >= (0xffffffff - 3x10^8).
1253         */
1254         if(tcount >= PCI_X_TCOUNT) {
1255                 ticks = (time_period - tcount);
1256                 VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks);
1257
1258                 clock = (ticks / 300000);
1259                 VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock);
1260
1261                 clock = (clock * 33);
1262                 VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock);
1263
1264                 /* PLL F Param (bit 22:16) */
1265                 fparam = (1400000 / clock) - 2;
1266                 VPRINTK("PLL F Param: 0x%x (%d)\n", fparam, fparam);
1267
1268                 /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */
1269                 pci_status = (0x8a001824 | (fparam << 16));
1270         } else
1271                 pci_status = PCI_PLL_INIT;
1272
1273         /* Initialize PLL. */
1274         VPRINTK("pci_status: 0x%x\n", pci_status);
1275         writel(pci_status, mmio + PDC_CTL_STATUS);
1276         readl(mmio + PDC_CTL_STATUS);
1277
1278         /*
1279            Read SPD of DIMM by I2C interface,
1280            and program the DIMM Module Controller.
1281         */
1282         if (!(speed = pdc20621_detect_dimm(pe))) {
1283                 printk(KERN_ERR "Detect Local DIMM Fail\n");
1284                 return 1;       /* DIMM error */
1285         }
1286         VPRINTK("Local DIMM Speed = %d\n", speed);
1287
1288         /* Programming DIMM0 Module Control Register (index_CID0:80h) */
1289         size = pdc20621_prog_dimm0(pe);
1290         VPRINTK("Local DIMM Size = %dMB\n",size);
1291
1292         /* Programming DIMM Module Global Control Register (index_CID0:88h) */
1293         if (pdc20621_prog_dimm_global(pe)) {
1294                 printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
1295                 return 1;
1296         }
1297
1298 #ifdef ATA_VERBOSE_DEBUG
1299         {
1300                 u8 test_parttern1[40] = {0x55,0xAA,'P','r','o','m','i','s','e',' ',
1301                                 'N','o','t',' ','Y','e','t',' ','D','e','f','i','n','e','d',' ',
1302                                  '1','.','1','0',
1303                                 '9','8','0','3','1','6','1','2',0,0};
1304                 u8 test_parttern2[40] = {0};
1305
1306                 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x10040, 40);
1307                 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x40, 40);
1308
1309                 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x10040, 40);
1310                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1311                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1312                        test_parttern2[1], &(test_parttern2[2]));
1313                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x10040,
1314                                        40);
1315                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1316                        test_parttern2[1], &(test_parttern2[2]));
1317
1318                 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x40, 40);
1319                 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1320                 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1321                        test_parttern2[1], &(test_parttern2[2]));
1322         }
1323 #endif
1324
1325         /* ECC initiliazation. */
1326
1327         pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1328                           PDC_DIMM_SPD_TYPE, &spd0);
1329         if (spd0 == 0x02) {
1330                 VPRINTK("Start ECC initialization\n");
1331                 addr = 0;
1332                 length = size * 1024 * 1024;
1333                 while (addr < length) {
1334                         pdc20621_put_to_dimm(pe, (void *) &tmp, addr,
1335                                              sizeof(u32));
1336                         addr += sizeof(u32);
1337                 }
1338                 VPRINTK("Finish ECC initialization\n");
1339         }
1340         return 0;
1341 }
1342
1343
1344 static void pdc_20621_init(struct ata_probe_ent *pe)
1345 {
1346         u32 tmp;
1347         void __iomem *mmio = pe->mmio_base;
1348
1349         /* hard-code chip #0 */
1350         mmio += PDC_CHIP0_OFS;
1351
1352         /*
1353          * Select page 0x40 for our 32k DIMM window
1354          */
1355         tmp = readl(mmio + PDC_20621_DIMM_WINDOW) & 0xffff0000;
1356         tmp |= PDC_PAGE_WINDOW; /* page 40h; arbitrarily selected */
1357         writel(tmp, mmio + PDC_20621_DIMM_WINDOW);
1358
1359         /*
1360          * Reset Host DMA
1361          */
1362         tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1363         tmp |= PDC_RESET;
1364         writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1365         readl(mmio + PDC_HDMA_CTLSTAT);         /* flush */
1366
1367         udelay(10);
1368
1369         tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1370         tmp &= ~PDC_RESET;
1371         writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1372         readl(mmio + PDC_HDMA_CTLSTAT);         /* flush */
1373 }
1374
1375 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1376 {
1377         static int printed_version;
1378         struct ata_probe_ent *probe_ent = NULL;
1379         unsigned long base;
1380         void __iomem *mmio_base;
1381         void __iomem *dimm_mmio = NULL;
1382         struct pdc_host_priv *hpriv = NULL;
1383         unsigned int board_idx = (unsigned int) ent->driver_data;
1384         int pci_dev_busy = 0;
1385         int rc;
1386
1387         if (!printed_version++)
1388                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1389
1390         /*
1391          * If this driver happens to only be useful on Apple's K2, then
1392          * we should check that here as it has a normal Serverworks ID
1393          */
1394         rc = pci_enable_device(pdev);
1395         if (rc)
1396                 return rc;
1397
1398         rc = pci_request_regions(pdev, DRV_NAME);
1399         if (rc) {
1400                 pci_dev_busy = 1;
1401                 goto err_out;
1402         }
1403
1404         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1405         if (rc)
1406                 goto err_out_regions;
1407         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1408         if (rc)
1409                 goto err_out_regions;
1410
1411         probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1412         if (probe_ent == NULL) {
1413                 rc = -ENOMEM;
1414                 goto err_out_regions;
1415         }
1416
1417         memset(probe_ent, 0, sizeof(*probe_ent));
1418         probe_ent->dev = pci_dev_to_dev(pdev);
1419         INIT_LIST_HEAD(&probe_ent->node);
1420
1421         mmio_base = pci_iomap(pdev, 3, 0);
1422         if (mmio_base == NULL) {
1423                 rc = -ENOMEM;
1424                 goto err_out_free_ent;
1425         }
1426         base = (unsigned long) mmio_base;
1427
1428         hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1429         if (!hpriv) {
1430                 rc = -ENOMEM;
1431                 goto err_out_iounmap;
1432         }
1433         memset(hpriv, 0, sizeof(*hpriv));
1434
1435         dimm_mmio = pci_iomap(pdev, 4, 0);
1436         if (!dimm_mmio) {
1437                 kfree(hpriv);
1438                 rc = -ENOMEM;
1439                 goto err_out_iounmap;
1440         }
1441
1442         hpriv->dimm_mmio = dimm_mmio;
1443
1444         probe_ent->sht          = pdc_port_info[board_idx].sht;
1445         probe_ent->host_flags   = pdc_port_info[board_idx].host_flags;
1446         probe_ent->pio_mask     = pdc_port_info[board_idx].pio_mask;
1447         probe_ent->mwdma_mask   = pdc_port_info[board_idx].mwdma_mask;
1448         probe_ent->udma_mask    = pdc_port_info[board_idx].udma_mask;
1449         probe_ent->port_ops     = pdc_port_info[board_idx].port_ops;
1450
1451         probe_ent->irq = pdev->irq;
1452         probe_ent->irq_flags = SA_SHIRQ;
1453         probe_ent->mmio_base = mmio_base;
1454
1455         probe_ent->private_data = hpriv;
1456         base += PDC_CHIP0_OFS;
1457
1458         probe_ent->n_ports = 4;
1459         pdc_sata_setup_port(&probe_ent->port[0], base + 0x200);
1460         pdc_sata_setup_port(&probe_ent->port[1], base + 0x280);
1461         pdc_sata_setup_port(&probe_ent->port[2], base + 0x300);
1462         pdc_sata_setup_port(&probe_ent->port[3], base + 0x380);
1463
1464         pci_set_master(pdev);
1465
1466         /* initialize adapter */
1467         /* initialize local dimm */
1468         if (pdc20621_dimm_init(probe_ent)) {
1469                 rc = -ENOMEM;
1470                 goto err_out_iounmap_dimm;
1471         }
1472         pdc_20621_init(probe_ent);
1473
1474         /* FIXME: check ata_device_add return value */
1475         ata_device_add(probe_ent);
1476         kfree(probe_ent);
1477
1478         return 0;
1479
1480 err_out_iounmap_dimm:           /* only get to this label if 20621 */
1481         kfree(hpriv);
1482         pci_iounmap(pdev, dimm_mmio);
1483 err_out_iounmap:
1484         pci_iounmap(pdev, mmio_base);
1485 err_out_free_ent:
1486         kfree(probe_ent);
1487 err_out_regions:
1488         pci_release_regions(pdev);
1489 err_out:
1490         if (!pci_dev_busy)
1491                 pci_disable_device(pdev);
1492         return rc;
1493 }
1494
1495
1496 static int __init pdc_sata_init(void)
1497 {
1498         return pci_module_init(&pdc_sata_pci_driver);
1499 }
1500
1501
1502 static void __exit pdc_sata_exit(void)
1503 {
1504         pci_unregister_driver(&pdc_sata_pci_driver);
1505 }
1506
1507
1508 MODULE_AUTHOR("Jeff Garzik");
1509 MODULE_DESCRIPTION("Promise SATA low-level driver");
1510 MODULE_LICENSE("GPL");
1511 MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl);
1512 MODULE_VERSION(DRV_VERSION);
1513
1514 module_init(pdc_sata_init);
1515 module_exit(pdc_sata_exit);