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     "0.4.1"
  27
  28 static int hpt3x3_probe_init(struct ata_port *ap)
  29 {
  30         ap->cbl = ATA_CBL_PATA40;
  31         return ata_std_prereset(ap);
  32 }
  33
  34 /**
  35  *      hpt3x3_probe_reset      -       reset the hpt3x3 bus
  36  *      @ap: ATA port to reset
  37  *
  38  *      Perform the housekeeping when doing an ATA bus reeset. We just
  39  *      need to force the cable type.
  40  */
  41
  42 static void hpt3x3_error_handler(struct ata_port *ap)
  43 {
  44         return ata_bmdma_drive_eh(ap, hpt3x3_probe_init, ata_std_softreset, NULL, ata_std_postreset);
  45 }
  46
  47 /**
  48  *      hpt3x3_set_piomode              -       PIO setup
  49  *      @ap: ATA interface
  50  *      @adev: device on the interface
  51  *
  52  *      Set our PIO requirements. This is fairly simple on the HPT3x3 as
  53  *      all we have to do is clear the MWDMA and UDMA bits then load the
  54  *      mode number.
  55  */
  56
  57 static void hpt3x3_set_piomode(struct ata_port *ap, struct ata_device *adev)
  58 {
  59         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  60         u32 r1, r2;
  61         int dn = 2 * ap->port_no + adev->devno;
  62
  63         pci_read_config_dword(pdev, 0x44, &r1);
  64         pci_read_config_dword(pdev, 0x48, &r2);
  65         /* Load the PIO timing number */
  66         r1 &= ~(7 << (3 * dn));
  67         r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
  68         r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */
  69
  70         pci_write_config_dword(pdev, 0x44, r1);
  71         pci_write_config_dword(pdev, 0x48, r2);
  72 }
  73
  74 /**
  75  *      hpt3x3_set_dmamode              -       DMA timing setup
  76  *      @ap: ATA interface
  77  *      @adev: Device being configured
  78  *
  79  *      Set up the channel for MWDMA or UDMA modes. Much the same as with
  80  *      PIO, load the mode number and then set MWDMA or UDMA flag.
  81  */
  82
  83 static void hpt3x3_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  84 {
  85         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  86         u32 r1, r2;
  87         int dn = 2 * ap->port_no + adev->devno;
  88         int mode_num = adev->dma_mode & 0x0F;
  89
  90         pci_read_config_dword(pdev, 0x44, &r1);
  91         pci_read_config_dword(pdev, 0x48, &r2);
  92         /* Load the timing number */
  93         r1 &= ~(7 << (3 * dn));
  94         r1 |= (mode_num << (3 * dn));
  95         r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */
  96
  97         if (adev->dma_mode >= XFER_UDMA_0)
  98                 r2 |= 0x01 << dn;       /* Ultra mode */
  99         else
 100                 r2 |= 0x10 << dn;       /* MWDMA */
 101
 102         pci_write_config_dword(pdev, 0x44, r1);
 103         pci_write_config_dword(pdev, 0x48, r2);
 104 }
 105
 106 static struct scsi_host_template hpt3x3_sht = {
 107         .module                 = THIS_MODULE,
 108         .name                   = DRV_NAME,
 109         .ioctl                  = ata_scsi_ioctl,
 110         .queuecommand           = ata_scsi_queuecmd,
 111         .can_queue              = ATA_DEF_QUEUE,
 112         .this_id                = ATA_SHT_THIS_ID,
 113         .sg_tablesize           = LIBATA_MAX_PRD,
 114         .max_sectors            = ATA_MAX_SECTORS,
 115         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 116         .emulated               = ATA_SHT_EMULATED,
 117         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 118         .proc_name              = DRV_NAME,
 119         .dma_boundary           = ATA_DMA_BOUNDARY,
 120         .slave_configure        = ata_scsi_slave_config,
 121         .bios_param             = ata_std_bios_param,
 122 };
 123
 124 static struct ata_port_operations hpt3x3_port_ops = {
 125         .port_disable   = ata_port_disable,
 126         .set_piomode    = hpt3x3_set_piomode,
 127         .set_dmamode    = hpt3x3_set_dmamode,
 128         .mode_filter    = ata_pci_default_filter,
 129
 130         .tf_load        = ata_tf_load,
 131         .tf_read        = ata_tf_read,
 132         .check_status   = ata_check_status,
 133         .exec_command   = ata_exec_command,
 134         .dev_select     = ata_std_dev_select,
 135
 136         .freeze         = ata_bmdma_freeze,
 137         .thaw           = ata_bmdma_thaw,
 138         .error_handler  = hpt3x3_error_handler,
 139         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 140
 141         .bmdma_setup    = ata_bmdma_setup,
 142         .bmdma_start    = ata_bmdma_start,
 143         .bmdma_stop     = ata_bmdma_stop,
 144         .bmdma_status   = ata_bmdma_status,
 145
 146         .qc_prep        = ata_qc_prep,
 147         .qc_issue       = ata_qc_issue_prot,
 148
 149         .data_xfer      = ata_pio_data_xfer,
 150
 151         .irq_handler    = ata_interrupt,
 152         .irq_clear      = ata_bmdma_irq_clear,
 153
 154         .port_start     = ata_port_start,
 155         .port_stop      = ata_port_stop,
 156         .host_stop      = ata_host_stop
 157 };
 158
 159 /**
 160  *      hpt3x3_init_one         -       Initialise an HPT343/363
 161  *      @dev: PCI device
 162  *      @id: Entry in match table
 163  *
 164  *      Perform basic initialisation. The chip has a quirk that it won't
 165  *      function unless it is at XX00. The old ATA driver touched this up
 166  *      but we leave it for pci quirks to do properly.
 167  */
 168
 169 static int hpt3x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 170 {
 171         static struct ata_port_info info = {
 172                 .sht = &hpt3x3_sht,
 173                 .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 174                 .pio_mask = 0x1f,
 175                 .mwdma_mask = 0x07,
 176                 .udma_mask = 0x07,
 177                 .port_ops = &hpt3x3_port_ops
 178         };
 179         static struct ata_port_info *port_info[2] = { &info, &info };
 180         u16 cmd;
 181
 182         /* Initialize the board */
 183         pci_write_config_word(dev, 0x80, 0x00);
 184         /* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
 185         pci_read_config_word(dev, PCI_COMMAND, &cmd);
 186         if (cmd & PCI_COMMAND_MEMORY)
 187                 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
 188         else
 189                 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
 190
 191         /* Now kick off ATA set up */
 192         return ata_pci_init_one(dev, port_info, 2);
 193 }
 194
 195 static const struct pci_device_id hpt3x3[] = {
 196         { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT343), },
 197
 198         { },
 199 };
 200
 201 static struct pci_driver hpt3x3_pci_driver = {
 202         .name           = DRV_NAME,
 203         .id_table       = hpt3x3,
 204         .probe          = hpt3x3_init_one,
 205         .remove         = ata_pci_remove_one
 206 };
 207
 208 static int __init hpt3x3_init(void)
 209 {
 210         return pci_register_driver(&hpt3x3_pci_driver);
 211 }
 212
 213
 214 static void __exit hpt3x3_exit(void)
 215 {
 216         pci_unregister_driver(&hpt3x3_pci_driver);
 217 }
 218
 219
 220 MODULE_AUTHOR("Alan Cox");
 221 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
 222 MODULE_LICENSE("GPL");
 223 MODULE_DEVICE_TABLE(pci, hpt3x3);
 224 MODULE_VERSION(DRV_VERSION);
 225
 226 module_init(hpt3x3_init);
 227 module_exit(hpt3x3_exit);