LXR linux/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
  37static 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
  84static 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
  90static 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
  95static 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
 104static 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
 109static const struct pci_device_id triflex_pci_tbl[] = {
 110        { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
 111        { 0, },
 112};
 113MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 114
 115#ifdef CONFIG_PM
 116static 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
 129static 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
 138static int __init triflex_ide_init(void)
 139{
 140        return ide_pci_register_driver(&triflex_pci_driver);
 141}
 142
 143static void __exit triflex_ide_exit(void)
 144{
 145        pci_unregister_driver(&triflex_pci_driver);
 146}
 147
 148module_init(triflex_ide_init);
 149module_exit(triflex_ide_exit);
 150
 151MODULE_AUTHOR("Torben Mathiasen");
 152MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 153MODULE_LICENSE("GPL");
 154
 155
 156