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
  25 static 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
  72 static 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
  78 static 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
  83 static 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
  92 static 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
  97 static const struct pci_device_id triflex_pci_tbl[] = {
  98         { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
  99         { 0, },
 100 };
 101 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 102
 103 #ifdef CONFIG_PM
 104 static 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
 117 static 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
 126 static int __init triflex_ide_init(void)
 127 {
 128         return ide_pci_register_driver(&triflex_pci_driver);
 129 }
 130
 131 static void __exit triflex_ide_exit(void)
 132 {
 133         pci_unregister_driver(&triflex_pci_driver);
 134 }
 135
 136 module_init(triflex_ide_init);
 137 module_exit(triflex_ide_exit);
 138
 139 MODULE_AUTHOR("Torben Mathiasen");
 140 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 141 MODULE_LICENSE("GPL");
 142
 143