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143 lines
3.2 KiB
143 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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 <[email protected]> |
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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 = { |
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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 triflex_init_one(struct pci_dev *dev, 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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