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