triflex.c
3.81 KB
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/*
* IDE Chipset driver for the Compaq TriFlex IDE controller.
*
* Known to work with the Compaq Workstation 5x00 series.
*
* Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
* Author: Torben Mathiasen <torben.mathiasen@hp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Loosely based on the piix & svwks drivers.
*
* Documentation:
* Not publicly available.
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/init.h>
#define DRV_NAME "triflex"
static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
u32 triflex_timings = 0;
u16 timing = 0;
u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
pci_read_config_dword(dev, channel_offset, &triflex_timings);
switch (drive->dma_mode) {
case XFER_MW_DMA_2:
timing = 0x0103;
break;
case XFER_MW_DMA_1:
timing = 0x0203;
break;
case XFER_MW_DMA_0:
timing = 0x0808;
break;
case XFER_SW_DMA_2:
case XFER_SW_DMA_1:
case XFER_SW_DMA_0:
timing = 0x0f0f;
break;
case XFER_PIO_4:
timing = 0x0202;
break;
case XFER_PIO_3:
timing = 0x0204;
break;
case XFER_PIO_2:
timing = 0x0404;
break;
case XFER_PIO_1:
timing = 0x0508;
break;
case XFER_PIO_0:
timing = 0x0808;
break;
}
triflex_timings &= ~(0xFFFF << (16 * unit));
triflex_timings |= (timing << (16 * unit));
pci_write_config_dword(dev, channel_offset, triflex_timings);
}
static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
drive->dma_mode = drive->pio_mode;
triflex_set_mode(hwif, drive);
}
static const struct ide_port_ops triflex_port_ops = {
.set_pio_mode = triflex_set_pio_mode,
.set_dma_mode = triflex_set_mode,
};
static const struct ide_port_info triflex_device = {
.name = DRV_NAME,
.enablebits = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
.port_ops = &triflex_port_ops,
.pio_mask = ATA_PIO4,
.swdma_mask = ATA_SWDMA2,
.mwdma_mask = ATA_MWDMA2,
};
static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
return ide_pci_init_one(dev, &triflex_device, NULL);
}
static const struct pci_device_id triflex_pci_tbl[] = {
{ PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
#ifdef CONFIG_PM
static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
{
/*
* We must not disable or powerdown the device.
* APM bios refuses to suspend if IDE is not accessible.
*/
pci_save_state(dev);
return 0;
}
#else
#define triflex_ide_pci_suspend NULL
#endif
static struct pci_driver triflex_pci_driver = {
.name = "TRIFLEX_IDE",
.id_table = triflex_pci_tbl,
.probe = triflex_init_one,
.remove = ide_pci_remove,
.suspend = triflex_ide_pci_suspend,
.resume = ide_pci_resume,
};
static int __init triflex_ide_init(void)
{
return ide_pci_register_driver(&triflex_pci_driver);
}
static void __exit triflex_ide_exit(void)
{
pci_unregister_driver(&triflex_pci_driver);
}
module_init(triflex_ide_init);
module_exit(triflex_ide_exit);
MODULE_AUTHOR("Torben Mathiasen");
MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
MODULE_LICENSE("GPL");