drivers/ide/triflex.c

   1 /*
   2  * IDE Chipset driver for the Compaq TriFlex IDE controller.
   3  *
   4  * Known to work with the Compaq Workstation 5x00 series.
   5  *
   6  * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
   7  * Author: Torben Mathiasen <torben.mathiasen@hp.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  * Loosely based on the piix & svwks drivers.
  23  *
  24  * Documentation:
  25  *      Not publicly available.
  26  */
  27
  28 #include <linux/types.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/pci.h>
  32 #include <linux/ide.h>
  33 #include <linux/init.h>
  34
  35 #define DRV_NAME "triflex"
  36
  37 static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  38 {
  39         struct pci_dev *dev = to_pci_dev(hwif->dev);
  40         u32 triflex_timings = 0;
  41         u16 timing = 0;
  42         u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
  43
  44         pci_read_config_dword(dev, channel_offset, &triflex_timings);
  45
  46         switch (drive->dma_mode) {
  47                 case XFER_MW_DMA_2:
  48                         timing = 0x0103;
  49                         break;
  50                 case XFER_MW_DMA_1:
  51                         timing = 0x0203;
  52                         break;
  53                 case XFER_MW_DMA_0:
  54                         timing = 0x0808;
  55                         break;
  56                 case XFER_SW_DMA_2:
  57                 case XFER_SW_DMA_1:
  58                 case XFER_SW_DMA_0:
  59                         timing = 0x0f0f;
  60                         break;
  61                 case XFER_PIO_4:
  62                         timing = 0x0202;
  63                         break;
  64                 case XFER_PIO_3:
  65                         timing = 0x0204;
  66                         break;
  67                 case XFER_PIO_2:
  68                         timing = 0x0404;
  69                         break;
  70                 case XFER_PIO_1:
  71                         timing = 0x0508;
  72                         break;
  73                 case XFER_PIO_0:
  74                         timing = 0x0808;
  75                         break;
  76         }
  77
  78         triflex_timings &= ~(0xFFFF << (16 * unit));
  79         triflex_timings |= (timing << (16 * unit));
  80
  81         pci_write_config_dword(dev, channel_offset, triflex_timings);
  82 }
  83
  84 static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  85 {
  86         drive->dma_mode = drive->pio_mode;
  87         triflex_set_mode(hwif, drive);
  88 }
  89
  90 static const struct ide_port_ops triflex_port_ops = {
  91         .set_pio_mode           = triflex_set_pio_mode,
  92         .set_dma_mode           = triflex_set_mode,
  93 };
  94
  95 static const struct ide_port_info triflex_device = {
  96         .name           = DRV_NAME,
  97         .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
  98         .port_ops       = &triflex_port_ops,
  99         .pio_mask       = ATA_PIO4,
 100         .swdma_mask     = ATA_SWDMA2,
 101         .mwdma_mask     = ATA_MWDMA2,
 102 };
 103
 104 static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 105 {
 106         return ide_pci_init_one(dev, &triflex_device, NULL);
 107 }
 108
 109 static const struct pci_device_id triflex_pci_tbl[] = {
 110         { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
 111         { 0, },
 112 };
 113 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 114
 115 #ifdef CONFIG_PM
 116 static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
 117 {
 118         /*
 119          * We must not disable or powerdown the device.
 120          * APM bios refuses to suspend if IDE is not accessible.
 121          */
 122         pci_save_state(dev);
 123         return 0;
 124 }
 125 #else
 126 #define triflex_ide_pci_suspend NULL
 127 #endif
 128
 129 static struct pci_driver triflex_pci_driver = {
 130         .name           = "TRIFLEX_IDE",
 131         .id_table       = triflex_pci_tbl,
 132         .probe          = triflex_init_one,
 133         .remove         = ide_pci_remove,
 134         .suspend        = triflex_ide_pci_suspend,
 135         .resume         = ide_pci_resume,
 136 };
 137
 138 static int __init triflex_ide_init(void)
 139 {
 140         return ide_pci_register_driver(&triflex_pci_driver);
 141 }
 142
 143 static void __exit triflex_ide_exit(void)
 144 {
 145         pci_unregister_driver(&triflex_pci_driver);
 146 }
 147
 148 module_init(triflex_ide_init);
 149 module_exit(triflex_ide_exit);
 150
 151 MODULE_AUTHOR("Torben Mathiasen");
 152 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 153 MODULE_LICENSE("GPL");
 154
 155