LXR linux/drivers/ide/triflex.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * IDE Chipset driver for the Compaq TriFlex IDE controller.
   4 * 
   5 * Known to work with the Compaq Workstation 5x00 series.
   6 *
   7 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
   8 * Author: Torben Mathiasen <torben.mathiasen@hp.com>
   9 * 
  10 * Loosely based on the piix & svwks drivers.
  11 *
  12 * Documentation:
  13 *      Not publicly available.
  14 */
  15
  16#include <linux/types.h>
  17#include <linux/module.h>
  18#include <linux/kernel.h>
  19#include <linux/pci.h>
  20#include <linux/ide.h>
  21#include <linux/init.h>
  22
  23#define DRV_NAME "triflex"
  24
  25static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  26{
  27        struct pci_dev *dev = to_pci_dev(hwif->dev);
  28        u32 triflex_timings = 0;
  29        u16 timing = 0;
  30        u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
  31
  32        pci_read_config_dword(dev, channel_offset, &triflex_timings);
  33
  34        switch (drive->dma_mode) {
  35                case XFER_MW_DMA_2:
  36                        timing = 0x0103; 
  37                        break;
  38                case XFER_MW_DMA_1:
  39                        timing = 0x0203;
  40                        break;
  41                case XFER_MW_DMA_0:
  42                        timing = 0x0808;
  43                        break;
  44                case XFER_SW_DMA_2:
  45                case XFER_SW_DMA_1:
  46                case XFER_SW_DMA_0:
  47                        timing = 0x0f0f;
  48                        break;
  49                case XFER_PIO_4:
  50                        timing = 0x0202;
  51                        break;
  52                case XFER_PIO_3:
  53                        timing = 0x0204;
  54                        break;
  55                case XFER_PIO_2:
  56                        timing = 0x0404;
  57                        break;
  58                case XFER_PIO_1:
  59                        timing = 0x0508;
  60                        break;
  61                case XFER_PIO_0:
  62                        timing = 0x0808;
  63                        break;
  64        }
  65
  66        triflex_timings &= ~(0xFFFF << (16 * unit));
  67        triflex_timings |= (timing << (16 * unit));
  68        
  69        pci_write_config_dword(dev, channel_offset, triflex_timings);
  70}
  71
  72static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  73{
  74        drive->dma_mode = drive->pio_mode;
  75        triflex_set_mode(hwif, drive);
  76}
  77
  78static const struct ide_port_ops triflex_port_ops = {
  79        .set_pio_mode           = triflex_set_pio_mode,
  80        .set_dma_mode           = triflex_set_mode,
  81};
  82
  83static const struct ide_port_info triflex_device = {
  84        .name           = DRV_NAME,
  85        .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
  86        .port_ops       = &triflex_port_ops,
  87        .pio_mask       = ATA_PIO4,
  88        .swdma_mask     = ATA_SWDMA2,
  89        .mwdma_mask     = ATA_MWDMA2,
  90};
  91
  92static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
  93{
  94        return ide_pci_init_one(dev, &triflex_device, NULL);
  95}
  96
  97static const struct pci_device_id triflex_pci_tbl[] = {
  98        { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
  99        { 0, },
 100};
 101MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 102
 103#ifdef CONFIG_PM
 104static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
 105{
 106        /*
 107         * We must not disable or powerdown the device.
 108         * APM bios refuses to suspend if IDE is not accessible.
 109         */
 110        pci_save_state(dev);
 111        return 0;
 112}
 113#else
 114#define triflex_ide_pci_suspend NULL
 115#endif
 116
 117static struct pci_driver triflex_pci_driver = {
 118        .name           = "TRIFLEX_IDE",
 119        .id_table       = triflex_pci_tbl,
 120        .probe          = triflex_init_one,
 121        .remove         = ide_pci_remove,
 122        .suspend        = triflex_ide_pci_suspend,
 123        .resume         = ide_pci_resume,
 124};
 125
 126static int __init triflex_ide_init(void)
 127{
 128        return ide_pci_register_driver(&triflex_pci_driver);
 129}
 130
 131static void __exit triflex_ide_exit(void)
 132{
 133        pci_unregister_driver(&triflex_pci_driver);
 134}
 135
 136module_init(triflex_ide_init);
 137module_exit(triflex_ide_exit);
 138
 139MODULE_AUTHOR("Torben Mathiasen");
 140MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 141MODULE_LICENSE("GPL");
 142
 143
 144