drivers/ata/pata_atiixp.c

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