diff options
Diffstat (limited to 'kernel/drivers/ide/triflex.c')
| -rw-r--r-- | kernel/drivers/ide/triflex.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/kernel/drivers/ide/triflex.c b/kernel/drivers/ide/triflex.c new file mode 100644 index 000000000..7f1af9493 --- /dev/null +++ b/kernel/drivers/ide/triflex.c @@ -0,0 +1,155 @@ +/* + * 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"); + + |