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