drivers/ata/pata_hpt3x3.c

   1 /*
   2  *      pata_hpt3x3             -       HPT3x3 driver
   3  *      (c) Copyright 2005-2006 Red Hat
   4  *
   5  *      Was pata_hpt34x but the naming was confusing as it supported the
   6  *      343 and 363 so it has been renamed.
   7  *
   8  *      Based on:
   9  *      linux/drivers/ide/pci/hpt34x.c          Version 0.40    Sept 10, 2002
  10  *      Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *      May be copied or modified under the terms of the GNU General Public
  13  *      License
  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
  24 #define DRV_NAME        "pata_hpt3x3"
  25 #define DRV_VERSION     "0.6.1"
  26
  27 /**
  28  *      hpt3x3_set_piomode              -       PIO setup
  29  *      @ap: ATA interface
  30  *      @adev: device on the interface
  31  *
  32  *      Set our PIO requirements. This is fairly simple on the HPT3x3 as
  33  *      all we have to do is clear the MWDMA and UDMA bits then load the
  34  *      mode number.
  35  */
  36
  37 static void hpt3x3_set_piomode(struct ata_port *ap, struct ata_device *adev)
  38 {
  39         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  40         u32 r1, r2;
  41         int dn = 2 * ap->port_no + adev->devno;
  42
  43         pci_read_config_dword(pdev, 0x44, &r1);
  44         pci_read_config_dword(pdev, 0x48, &r2);
  45         /* Load the PIO timing number */
  46         r1 &= ~(7 << (3 * dn));
  47         r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
  48         r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */
  49
  50         pci_write_config_dword(pdev, 0x44, r1);
  51         pci_write_config_dword(pdev, 0x48, r2);
  52 }
  53
  54 #if defined(CONFIG_PATA_HPT3X3_DMA)
  55 /**
  56  *      hpt3x3_set_dmamode              -       DMA timing setup
  57  *      @ap: ATA interface
  58  *      @adev: Device being configured
  59  *
  60  *      Set up the channel for MWDMA or UDMA modes. Much the same as with
  61  *      PIO, load the mode number and then set MWDMA or UDMA flag.
  62  *
  63  *      0x44 : bit 0-2 master mode, 3-5 slave mode, etc
  64  *      0x48 : bit 4/0 DMA/UDMA bit 5/1 for slave etc
  65  */
  66
  67 static void hpt3x3_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  68 {
  69         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  70         u32 r1, r2;
  71         int dn = 2 * ap->port_no + adev->devno;
  72         int mode_num = adev->dma_mode & 0x0F;
  73
  74         pci_read_config_dword(pdev, 0x44, &r1);
  75         pci_read_config_dword(pdev, 0x48, &r2);
  76         /* Load the timing number */
  77         r1 &= ~(7 << (3 * dn));
  78         r1 |= (mode_num << (3 * dn));
  79         r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */
  80
  81         if (adev->dma_mode >= XFER_UDMA_0)
  82                 r2 |= (0x01 << dn);     /* Ultra mode */
  83         else
  84                 r2 |= (0x10 << dn);     /* MWDMA */
  85
  86         pci_write_config_dword(pdev, 0x44, r1);
  87         pci_write_config_dword(pdev, 0x48, r2);
  88 }
  89
  90 /**
  91  *      hpt3x3_freeze           -       DMA workaround
  92  *      @ap: port to freeze
  93  *
  94  *      When freezing an HPT3x3 we must stop any pending DMA before
  95  *      writing to the control register or the chip will hang
  96  */
  97
  98 static void hpt3x3_freeze(struct ata_port *ap)
  99 {
 100         void __iomem *mmio = ap->ioaddr.bmdma_addr;
 101
 102         iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ ATA_DMA_START,
 103                         mmio + ATA_DMA_CMD);
 104         ata_sff_dma_pause(ap);
 105         ata_sff_freeze(ap);
 106 }
 107
 108 /**
 109  *      hpt3x3_bmdma_setup      -       DMA workaround
 110  *      @qc: Queued command
 111  *
 112  *      When issuing BMDMA we must clean up the error/active bits in
 113  *      software on this device
 114  */
 115
 116 static void hpt3x3_bmdma_setup(struct ata_queued_cmd *qc)
 117 {
 118         struct ata_port *ap = qc->ap;
 119         u8 r = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
 120         r |= ATA_DMA_INTR | ATA_DMA_ERR;
 121         iowrite8(r, ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
 122         return ata_bmdma_setup(qc);
 123 }
 124
 125 /**
 126  *      hpt3x3_atapi_dma        -       ATAPI DMA check
 127  *      @qc: Queued command
 128  *
 129  *      Just say no - we don't do ATAPI DMA
 130  */
 131
 132 static int hpt3x3_atapi_dma(struct ata_queued_cmd *qc)
 133 {
 134         return 1;
 135 }
 136
 137 #endif /* CONFIG_PATA_HPT3X3_DMA */
 138
 139 static struct scsi_host_template hpt3x3_sht = {
 140         ATA_BMDMA_SHT(DRV_NAME),
 141 };
 142
 143 static struct ata_port_operations hpt3x3_port_ops = {
 144         .inherits       = &ata_bmdma_port_ops,
 145         .cable_detect   = ata_cable_40wire,
 146         .set_piomode    = hpt3x3_set_piomode,
 147 #if defined(CONFIG_PATA_HPT3X3_DMA)
 148         .set_dmamode    = hpt3x3_set_dmamode,
 149         .bmdma_setup    = hpt3x3_bmdma_setup,
 150         .check_atapi_dma= hpt3x3_atapi_dma,
 151         .freeze         = hpt3x3_freeze,
 152 #endif
 153
 154 };
 155
 156 /**
 157  *      hpt3x3_init_chipset     -       chip setup
 158  *      @dev: PCI device
 159  *
 160  *      Perform the setup required at boot and on resume.
 161  */
 162
 163 static void hpt3x3_init_chipset(struct pci_dev *dev)
 164 {
 165         u16 cmd;
 166         /* Initialize the board */
 167         pci_write_config_word(dev, 0x80, 0x00);
 168         /* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
 169         pci_read_config_word(dev, PCI_COMMAND, &cmd);
 170         if (cmd & PCI_COMMAND_MEMORY)
 171                 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
 172         else
 173                 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
 174 }
 175
 176 /**
 177  *      hpt3x3_init_one         -       Initialise an HPT343/363
 178  *      @pdev: PCI device
 179  *      @id: Entry in match table
 180  *
 181  *      Perform basic initialisation. We set the device up so we access all
 182  *      ports via BAR4. This is necessary to work around errata.
 183  */
 184
 185 static int hpt3x3_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 186 {
 187         static const struct ata_port_info info = {
 188                 .flags = ATA_FLAG_SLAVE_POSS,
 189                 .pio_mask = ATA_PIO4,
 190 #if defined(CONFIG_PATA_HPT3X3_DMA)
 191                 /* Further debug needed */
 192                 .mwdma_mask = ATA_MWDMA2,
 193                 .udma_mask = ATA_UDMA2,
 194 #endif
 195                 .port_ops = &hpt3x3_port_ops
 196         };
 197         /* Register offsets of taskfiles in BAR4 area */
 198         static const u8 offset_cmd[2] = { 0x20, 0x28 };
 199         static const u8 offset_ctl[2] = { 0x36, 0x3E };
 200         const struct ata_port_info *ppi[] = { &info, NULL };
 201         struct ata_host *host;
 202         int i, rc;
 203         void __iomem *base;
 204
 205         hpt3x3_init_chipset(pdev);
 206
 207         ata_print_version_once(&pdev->dev, DRV_VERSION);
 208
 209         host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
 210         if (!host)
 211                 return -ENOMEM;
 212         /* acquire resources and fill host */
 213         rc = pcim_enable_device(pdev);
 214         if (rc)
 215                 return rc;
 216
 217         /* Everything is relative to BAR4 if we set up this way */
 218         rc = pcim_iomap_regions(pdev, 1 << 4, DRV_NAME);
 219         if (rc == -EBUSY)
 220                 pcim_pin_device(pdev);
 221         if (rc)
 222                 return rc;
 223         host->iomap = pcim_iomap_table(pdev);
 224         rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);
 225         if (rc)
 226                 return rc;
 227         rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);
 228         if (rc)
 229                 return rc;
 230
 231         base = host->iomap[4];  /* Bus mastering base */
 232
 233         for (i = 0; i < host->n_ports; i++) {
 234                 struct ata_port *ap = host->ports[i];
 235                 struct ata_ioports *ioaddr = &ap->ioaddr;
 236
 237                 ioaddr->cmd_addr = base + offset_cmd[i];
 238                 ioaddr->altstatus_addr =
 239                 ioaddr->ctl_addr = base + offset_ctl[i];
 240                 ioaddr->scr_addr = NULL;
 241                 ata_sff_std_ports(ioaddr);
 242                 ioaddr->bmdma_addr = base + 8 * i;
 243
 244                 ata_port_pbar_desc(ap, 4, -1, "ioport");
 245                 ata_port_pbar_desc(ap, 4, offset_cmd[i], "cmd");
 246         }
 247         pci_set_master(pdev);
 248         return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
 249                                  IRQF_SHARED, &hpt3x3_sht);
 250 }
 251
 252 #ifdef CONFIG_PM_SLEEP
 253 static int hpt3x3_reinit_one(struct pci_dev *dev)
 254 {
 255         struct ata_host *host = pci_get_drvdata(dev);
 256         int rc;
 257
 258         rc = ata_pci_device_do_resume(dev);
 259         if (rc)
 260                 return rc;
 261
 262         hpt3x3_init_chipset(dev);
 263
 264         ata_host_resume(host);
 265         return 0;
 266 }
 267 #endif
 268
 269 static const struct pci_device_id hpt3x3[] = {
 270         { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT343), },
 271
 272         { },
 273 };
 274
 275 static struct pci_driver hpt3x3_pci_driver = {
 276         .name           = DRV_NAME,
 277         .id_table       = hpt3x3,
 278         .probe          = hpt3x3_init_one,
 279         .remove         = ata_pci_remove_one,
 280 #ifdef CONFIG_PM_SLEEP
 281         .suspend        = ata_pci_device_suspend,
 282         .resume         = hpt3x3_reinit_one,
 283 #endif
 284 };
 285
 286 module_pci_driver(hpt3x3_pci_driver);
 287
 288 MODULE_AUTHOR("Alan Cox");
 289 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
 290 MODULE_LICENSE("GPL");
 291 MODULE_DEVICE_TABLE(pci, hpt3x3);
 292 MODULE_VERSION(DRV_VERSION);