linux/drivers/ata/pata_atiixp.c
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   1/*
   2 * pata_atiixp.c        - ATI PATA for new ATA layer
   3 *                        (C) 2005 Red Hat Inc
   4 *                        (C) 2009-2010 Bartlomiej Zolnierkiewicz
   5 *
   6 * Based on
   7 *
   8 *  linux/drivers/ide/pci/atiixp.c      Version 0.01-bart2      Feb. 26, 2004
   9 *
  10 *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
  11 *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
  12 *
  13 */
  14
  15#include <linux/kernel.h>
  16#include <linux/module.h>
  17#include <linux/pci.h>
  18#include <linux/init.h>
  19#include <linux/blkdev.h>
  20#include <linux/delay.h>
  21#include <scsi/scsi_host.h>
  22#include <linux/libata.h>
  23#include <linux/dmi.h>
  24
  25#define DRV_NAME "pata_atiixp"
  26#define DRV_VERSION "0.4.6"
  27
  28enum {
  29        ATIIXP_IDE_PIO_TIMING   = 0x40,
  30        ATIIXP_IDE_MWDMA_TIMING = 0x44,
  31        ATIIXP_IDE_PIO_CONTROL  = 0x48,
  32        ATIIXP_IDE_PIO_MODE     = 0x4a,
  33        ATIIXP_IDE_UDMA_CONTROL = 0x54,
  34        ATIIXP_IDE_UDMA_MODE    = 0x56
  35};
  36
  37static const struct dmi_system_id attixp_cable_override_dmi_table[] = {
  38        {
  39                /* Board has onboard PATA<->SATA converters */
  40                .ident = "MSI E350DM-E33",
  41                .matches = {
  42                        DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
  43                        DMI_MATCH(DMI_BOARD_NAME, "E350DM-E33(MS-7720)"),
  44                },
  45        },
  46        { }
  47};
  48
  49static int atiixp_cable_detect(struct ata_port *ap)
  50{
  51        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  52        u8 udma;
  53
  54        if (dmi_check_system(attixp_cable_override_dmi_table))
  55                return ATA_CBL_PATA40_SHORT;
  56
  57        /* Hack from drivers/ide/pci. Really we want to know how to do the
  58           raw detection not play follow the bios mode guess */
  59        pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
  60        if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
  61                return  ATA_CBL_PATA80;
  62        return ATA_CBL_PATA40;
  63}
  64
  65static DEFINE_SPINLOCK(atiixp_lock);
  66
  67/**
  68 *      atiixp_prereset -       perform reset handling
  69 *      @link: ATA link
  70 *      @deadline: deadline jiffies for the operation
  71 *
  72 *      Reset sequence checking enable bits to see which ports are
  73 *      active.
  74 */
  75
  76static int atiixp_prereset(struct ata_link *link, unsigned long deadline)
  77{
  78        static const struct pci_bits atiixp_enable_bits[] = {
  79                { 0x48, 1, 0x01, 0x00 },
  80                { 0x48, 1, 0x08, 0x00 }
  81        };
  82
  83        struct ata_port *ap = link->ap;
  84        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  85
  86        if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
  87                return -ENOENT;
  88
  89        return ata_sff_prereset(link, deadline);
  90}
  91
  92/**
  93 *      atiixp_set_pio_timing   -       set initial PIO mode data
  94 *      @ap: ATA interface
  95 *      @adev: ATA device
  96 *
  97 *      Called by both the pio and dma setup functions to set the controller
  98 *      timings for PIO transfers. We must load both the mode number and
  99 *      timing values into the controller.
 100 */
 101
 102static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
 103{
 104        static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
 105
 106        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 107        int dn = 2 * ap->port_no + adev->devno;
 108        int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
 109        u32 pio_timing_data;
 110        u16 pio_mode_data;
 111
 112        pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 113        pio_mode_data &= ~(0x7 << (4 * dn));
 114        pio_mode_data |= pio << (4 * dn);
 115        pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
 116
 117        pci_read_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 118        pio_timing_data &= ~(0xFF << timing_shift);
 119        pio_timing_data |= (pio_timings[pio] << timing_shift);
 120        pci_write_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 121}
 122
 123/**
 124 *      atiixp_set_piomode      -       set initial PIO mode data
 125 *      @ap: ATA interface
 126 *      @adev: ATA device
 127 *
 128 *      Called to do the PIO mode setup. We use a shared helper for this
 129 *      as the DMA setup must also adjust the PIO timing information.
 130 */
 131
 132static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
 133{
 134        unsigned long flags;
 135        spin_lock_irqsave(&atiixp_lock, flags);
 136        atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
 137        spin_unlock_irqrestore(&atiixp_lock, flags);
 138}
 139
 140/**
 141 *      atiixp_set_dmamode      -       set initial DMA mode data
 142 *      @ap: ATA interface
 143 *      @adev: ATA device
 144 *
 145 *      Called to do the DMA mode setup. We use timing tables for most
 146 *      modes but must tune an appropriate PIO mode to match.
 147 */
 148
 149static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 150{
 151        static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
 152
 153        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 154        int dma = adev->dma_mode;
 155        int dn = 2 * ap->port_no + adev->devno;
 156        int wanted_pio;
 157        unsigned long flags;
 158
 159        spin_lock_irqsave(&atiixp_lock, flags);
 160
 161        if (adev->dma_mode >= XFER_UDMA_0) {
 162                u16 udma_mode_data;
 163
 164                dma -= XFER_UDMA_0;
 165
 166                pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
 167                udma_mode_data &= ~(0x7 << (4 * dn));
 168                udma_mode_data |= dma << (4 * dn);
 169                pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
 170        } else {
 171                int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
 172                u32 mwdma_timing_data;
 173
 174                dma -= XFER_MW_DMA_0;
 175
 176                pci_read_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
 177                                      &mwdma_timing_data);
 178                mwdma_timing_data &= ~(0xFF << timing_shift);
 179                mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
 180                pci_write_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
 181                                       mwdma_timing_data);
 182        }
 183        /*
 184         *      We must now look at the PIO mode situation. We may need to
 185         *      adjust the PIO mode to keep the timings acceptable
 186         */
 187         if (adev->dma_mode >= XFER_MW_DMA_2)
 188                wanted_pio = 4;
 189        else if (adev->dma_mode == XFER_MW_DMA_1)
 190                wanted_pio = 3;
 191        else if (adev->dma_mode == XFER_MW_DMA_0)
 192                wanted_pio = 0;
 193        else BUG();
 194
 195        if (adev->pio_mode != wanted_pio)
 196                atiixp_set_pio_timing(ap, adev, wanted_pio);
 197        spin_unlock_irqrestore(&atiixp_lock, flags);
 198}
 199
 200/**
 201 *      atiixp_bmdma_start      -       DMA start callback
 202 *      @qc: Command in progress
 203 *
 204 *      When DMA begins we need to ensure that the UDMA control
 205 *      register for the channel is correctly set.
 206 *
 207 *      Note: The host lock held by the libata layer protects
 208 *      us from two channels both trying to set DMA bits at once
 209 */
 210
 211static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
 212{
 213        struct ata_port *ap = qc->ap;
 214        struct ata_device *adev = qc->dev;
 215
 216        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 217        int dn = (2 * ap->port_no) + adev->devno;
 218        u16 tmp16;
 219
 220        pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 221        if (ata_using_udma(adev))
 222                tmp16 |= (1 << dn);
 223        else
 224                tmp16 &= ~(1 << dn);
 225        pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 226        ata_bmdma_start(qc);
 227}
 228
 229/**
 230 *      atiixp_dma_stop -       DMA stop callback
 231 *      @qc: Command in progress
 232 *
 233 *      DMA has completed. Clear the UDMA flag as the next operations will
 234 *      be PIO ones not UDMA data transfer.
 235 *
 236 *      Note: The host lock held by the libata layer protects
 237 *      us from two channels both trying to set DMA bits at once
 238 */
 239
 240static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
 241{
 242        struct ata_port *ap = qc->ap;
 243        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 244        int dn = (2 * ap->port_no) + qc->dev->devno;
 245        u16 tmp16;
 246
 247        pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 248        tmp16 &= ~(1 << dn);
 249        pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 250        ata_bmdma_stop(qc);
 251}
 252
 253static struct scsi_host_template atiixp_sht = {
 254        ATA_BMDMA_SHT(DRV_NAME),
 255        .sg_tablesize           = LIBATA_DUMB_MAX_PRD,
 256};
 257
 258static struct ata_port_operations atiixp_port_ops = {
 259        .inherits       = &ata_bmdma_port_ops,
 260
 261        .qc_prep        = ata_bmdma_dumb_qc_prep,
 262        .bmdma_start    = atiixp_bmdma_start,
 263        .bmdma_stop     = atiixp_bmdma_stop,
 264
 265        .prereset       = atiixp_prereset,
 266        .cable_detect   = atiixp_cable_detect,
 267        .set_piomode    = atiixp_set_piomode,
 268        .set_dmamode    = atiixp_set_dmamode,
 269};
 270
 271static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 272{
 273        static const struct ata_port_info info = {
 274                .flags = ATA_FLAG_SLAVE_POSS,
 275                .pio_mask = ATA_PIO4,
 276                .mwdma_mask = ATA_MWDMA12_ONLY,
 277                .udma_mask = ATA_UDMA5,
 278                .port_ops = &atiixp_port_ops
 279        };
 280        const struct ata_port_info *ppi[] = { &info, &info };
 281
 282        return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
 283                                      ATA_HOST_PARALLEL_SCAN);
 284}
 285
 286static const struct pci_device_id atiixp[] = {
 287        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
 288        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
 289        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
 290        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
 291        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
 292        { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), },
 293
 294        { },
 295};
 296
 297static struct pci_driver atiixp_pci_driver = {
 298        .name           = DRV_NAME,
 299        .id_table       = atiixp,
 300        .probe          = atiixp_init_one,
 301        .remove         = ata_pci_remove_one,
 302#ifdef CONFIG_PM
 303        .resume         = ata_pci_device_resume,
 304        .suspend        = ata_pci_device_suspend,
 305#endif
 306};
 307
 308module_pci_driver(atiixp_pci_driver);
 309
 310MODULE_AUTHOR("Alan Cox");
 311MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
 312MODULE_LICENSE("GPL");
 313MODULE_DEVICE_TABLE(pci, atiixp);
 314MODULE_VERSION(DRV_VERSION);
 315
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