drivers/ide/pci/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 publically available.
  26  */
  27
  28 #include <linux/types.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/hdreg.h>
  32 #include <linux/pci.h>
  33 #include <linux/ide.h>
  34 #include <linux/init.h>
  35
  36 static void triflex_set_mode(ide_drive_t *drive, const u8 speed)
  37 {
  38         ide_hwif_t *hwif = HWIF(drive);
  39         struct pci_dev *dev = to_pci_dev(hwif->dev);
  40         u8 channel_offset = hwif->channel ? 0x74 : 0x70;
  41         u16 timing = 0;
  42         u32 triflex_timings = 0;
  43         u8 unit = (drive->select.b.unit & 0x01);
  44
  45         pci_read_config_dword(dev, channel_offset, &triflex_timings);
  46
  47         switch(speed) {
  48                 case XFER_MW_DMA_2:
  49                         timing = 0x0103;
  50                         break;
  51                 case XFER_MW_DMA_1:
  52                         timing = 0x0203;
  53                         break;
  54                 case XFER_MW_DMA_0:
  55                         timing = 0x0808;
  56                         break;
  57                 case XFER_SW_DMA_2:
  58                 case XFER_SW_DMA_1:
  59                 case XFER_SW_DMA_0:
  60                         timing = 0x0f0f;
  61                         break;
  62                 case XFER_PIO_4:
  63                         timing = 0x0202;
  64                         break;
  65                 case XFER_PIO_3:
  66                         timing = 0x0204;
  67                         break;
  68                 case XFER_PIO_2:
  69                         timing = 0x0404;
  70                         break;
  71                 case XFER_PIO_1:
  72                         timing = 0x0508;
  73                         break;
  74                 case XFER_PIO_0:
  75                         timing = 0x0808;
  76                         break;
  77         }
  78
  79         triflex_timings &= ~(0xFFFF << (16 * unit));
  80         triflex_timings |= (timing << (16 * unit));
  81
  82         pci_write_config_dword(dev, channel_offset, triflex_timings);
  83 }
  84
  85 static void triflex_set_pio_mode(ide_drive_t *drive, const u8 pio)
  86 {
  87         triflex_set_mode(drive, XFER_PIO_0 + pio);
  88 }
  89
  90 static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
  91 {
  92         hwif->set_pio_mode = &triflex_set_pio_mode;
  93         hwif->set_dma_mode = &triflex_set_mode;
  94 }
  95
  96 static const struct ide_port_info triflex_device __devinitdata = {
  97         .name           = "TRIFLEX",
  98         .init_hwif      = init_hwif_triflex,
  99         .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
 100         .host_flags     = IDE_HFLAG_BOOTABLE,
 101         .pio_mask       = ATA_PIO4,
 102         .swdma_mask     = ATA_SWDMA2,
 103         .mwdma_mask     = ATA_MWDMA2,
 104 };
 105
 106 static int __devinit triflex_init_one(struct pci_dev *dev,
 107                 const struct pci_device_id *id)
 108 {
 109         return ide_setup_pci_device(dev, &triflex_device);
 110 }
 111
 112 static const struct pci_device_id triflex_pci_tbl[] = {
 113         { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
 114         { 0, },
 115 };
 116 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 117
 118 static struct pci_driver driver = {
 119         .name           = "TRIFLEX_IDE",
 120         .id_table       = triflex_pci_tbl,
 121         .probe          = triflex_init_one,
 122 };
 123
 124 static int __init triflex_ide_init(void)
 125 {
 126         return ide_pci_register_driver(&driver);
 127 }
 128
 129 module_init(triflex_ide_init);
 130
 131 MODULE_AUTHOR("Torben Mathiasen");
 132 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 133 MODULE_LICENSE("GPL");
 134
 135