drivers/ata/pata_atiixp.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * pata_atiixp.c        - ATI PATA for new ATA layer
   4  *                        (C) 2005 Red Hat Inc
   5  *                        (C) 2009-2010 Bartlomiej Zolnierkiewicz
   6  *
   7  * Based on
   8  *
   9  *  linux/drivers/ide/pci/atiixp.c      Version 0.01-bart2      Feb. 26, 2004
  10  *
  11  *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
  12  *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
  13  *
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/pci.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
  28 enum {
  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
  37 static 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
  49 static 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
  65 static 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
  76 static 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  *      @pio: Requested PIO
  97  *
  98  *      Called by both the pio and dma setup functions to set the controller
  99  *      timings for PIO transfers. We must load both the mode number and
 100  *      timing values into the controller.
 101  */
 102
 103 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
 104 {
 105         static const u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
 106
 107         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 108         int dn = 2 * ap->port_no + adev->devno;
 109         int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
 110         u32 pio_timing_data;
 111         u16 pio_mode_data;
 112
 113         pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 114         pio_mode_data &= ~(0x7 << (4 * dn));
 115         pio_mode_data |= pio << (4 * dn);
 116         pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
 117
 118         pci_read_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 119         pio_timing_data &= ~(0xFF << timing_shift);
 120         pio_timing_data |= (pio_timings[pio] << timing_shift);
 121         pci_write_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 122 }
 123
 124 /**
 125  *      atiixp_set_piomode      -       set initial PIO mode data
 126  *      @ap: ATA interface
 127  *      @adev: ATA device
 128  *
 129  *      Called to do the PIO mode setup. We use a shared helper for this
 130  *      as the DMA setup must also adjust the PIO timing information.
 131  */
 132
 133 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
 134 {
 135         unsigned long flags;
 136         spin_lock_irqsave(&atiixp_lock, flags);
 137         atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
 138         spin_unlock_irqrestore(&atiixp_lock, flags);
 139 }
 140
 141 /**
 142  *      atiixp_set_dmamode      -       set initial DMA mode data
 143  *      @ap: ATA interface
 144  *      @adev: ATA device
 145  *
 146  *      Called to do the DMA mode setup. We use timing tables for most
 147  *      modes but must tune an appropriate PIO mode to match.
 148  */
 149
 150 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 151 {
 152         static const u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
 153
 154         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 155         int dma = adev->dma_mode;
 156         int dn = 2 * ap->port_no + adev->devno;
 157         int wanted_pio;
 158         unsigned long flags;
 159
 160         spin_lock_irqsave(&atiixp_lock, flags);
 161
 162         if (adev->dma_mode >= XFER_UDMA_0) {
 163                 u16 udma_mode_data;
 164
 165                 dma -= XFER_UDMA_0;
 166
 167                 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
 168                 udma_mode_data &= ~(0x7 << (4 * dn));
 169                 udma_mode_data |= dma << (4 * dn);
 170                 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
 171         } else {
 172                 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
 173                 u32 mwdma_timing_data;
 174
 175                 dma -= XFER_MW_DMA_0;
 176
 177                 pci_read_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
 178                                       &mwdma_timing_data);
 179                 mwdma_timing_data &= ~(0xFF << timing_shift);
 180                 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
 181                 pci_write_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
 182                                        mwdma_timing_data);
 183         }
 184         /*
 185          *      We must now look at the PIO mode situation. We may need to
 186          *      adjust the PIO mode to keep the timings acceptable
 187          */
 188         if (adev->dma_mode >= XFER_MW_DMA_2)
 189                 wanted_pio = 4;
 190         else if (adev->dma_mode == XFER_MW_DMA_1)
 191                 wanted_pio = 3;
 192         else if (adev->dma_mode == XFER_MW_DMA_0)
 193                 wanted_pio = 0;
 194         else BUG();
 195
 196         if (adev->pio_mode != wanted_pio)
 197                 atiixp_set_pio_timing(ap, adev, wanted_pio);
 198         spin_unlock_irqrestore(&atiixp_lock, flags);
 199 }
 200
 201 /**
 202  *      atiixp_bmdma_start      -       DMA start callback
 203  *      @qc: Command in progress
 204  *
 205  *      When DMA begins we need to ensure that the UDMA control
 206  *      register for the channel is correctly set.
 207  *
 208  *      Note: The host lock held by the libata layer protects
 209  *      us from two channels both trying to set DMA bits at once
 210  */
 211
 212 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
 213 {
 214         struct ata_port *ap = qc->ap;
 215         struct ata_device *adev = qc->dev;
 216
 217         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 218         int dn = (2 * ap->port_no) + adev->devno;
 219         u16 tmp16;
 220
 221         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 222         if (ata_using_udma(adev))
 223                 tmp16 |= (1 << dn);
 224         else
 225                 tmp16 &= ~(1 << dn);
 226         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 227         ata_bmdma_start(qc);
 228 }
 229
 230 /**
 231  *      atiixp_bmdma_stop       -       DMA stop callback
 232  *      @qc: Command in progress
 233  *
 234  *      DMA has completed. Clear the UDMA flag as the next operations will
 235  *      be PIO ones not UDMA data transfer.
 236  *
 237  *      Note: The host lock held by the libata layer protects
 238  *      us from two channels both trying to set DMA bits at once
 239  */
 240
 241 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
 242 {
 243         struct ata_port *ap = qc->ap;
 244         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 245         int dn = (2 * ap->port_no) + qc->dev->devno;
 246         u16 tmp16;
 247
 248         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 249         tmp16 &= ~(1 << dn);
 250         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 251         ata_bmdma_stop(qc);
 252 }
 253
 254 static const struct scsi_host_template atiixp_sht = {
 255         ATA_BASE_SHT(DRV_NAME),
 256         .sg_tablesize           = LIBATA_DUMB_MAX_PRD,
 257         .dma_boundary           = ATA_DMA_BOUNDARY,
 258 };
 259
 260 static struct ata_port_operations atiixp_port_ops = {
 261         .inherits       = &ata_bmdma_port_ops,
 262
 263         .qc_prep        = ata_bmdma_dumb_qc_prep,
 264         .bmdma_start    = atiixp_bmdma_start,
 265         .bmdma_stop     = atiixp_bmdma_stop,
 266
 267         .prereset       = atiixp_prereset,
 268         .cable_detect   = atiixp_cable_detect,
 269         .set_piomode    = atiixp_set_piomode,
 270         .set_dmamode    = atiixp_set_dmamode,
 271 };
 272
 273 static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 274 {
 275         static const struct ata_port_info info = {
 276                 .flags = ATA_FLAG_SLAVE_POSS,
 277                 .pio_mask = ATA_PIO4,
 278                 .mwdma_mask = ATA_MWDMA12_ONLY,
 279                 .udma_mask = ATA_UDMA5,
 280                 .port_ops = &atiixp_port_ops
 281         };
 282         const struct ata_port_info *ppi[] = { &info, &info };
 283
 284         /* SB600 doesn't have secondary port wired */
 285         if (pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE)
 286                 ppi[1] = &ata_dummy_port_info;
 287
 288         return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
 289                                       ATA_HOST_PARALLEL_SCAN);
 290 }
 291
 292 static const struct pci_device_id atiixp[] = {
 293         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
 294         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
 295         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
 296         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
 297         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
 298         { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), },
 299
 300         { },
 301 };
 302
 303 static struct pci_driver atiixp_pci_driver = {
 304         .name           = DRV_NAME,
 305         .id_table       = atiixp,
 306         .probe          = atiixp_init_one,
 307         .remove         = ata_pci_remove_one,
 308 #ifdef CONFIG_PM_SLEEP
 309         .resume         = ata_pci_device_resume,
 310         .suspend        = ata_pci_device_suspend,
 311 #endif
 312 };
 313
 314 module_pci_driver(atiixp_pci_driver);
 315
 316 MODULE_AUTHOR("Alan Cox");
 317 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
 318 MODULE_LICENSE("GPL");
 319 MODULE_DEVICE_TABLE(pci, atiixp);
 320 MODULE_VERSION(DRV_VERSION);