drivers/ide/pci/triflex.c

   1 /*
   2  * triflex.c
   3  *
   4  * IDE Chipset driver for the Compaq TriFlex IDE controller.
   5  *
   6  * Known to work with the Compaq Workstation 5x00 series.
   7  *
   8  * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
   9  * Author: Torben Mathiasen <torben.mathiasen@hp.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  *
  24  * Loosely based on the piix & svwks drivers.
  25  *
  26  * Documentation:
  27  *      Not publically available.
  28  */
  29
  30 #include <linux/types.h>
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/delay.h>
  34 #include <linux/timer.h>
  35 #include <linux/mm.h>
  36 #include <linux/ioport.h>
  37 #include <linux/blkdev.h>
  38 #include <linux/hdreg.h>
  39 #include <linux/pci.h>
  40 #include <linux/ide.h>
  41 #include <linux/init.h>
  42
  43 static int triflex_tune_chipset(ide_drive_t *drive, const u8 speed)
  44 {
  45         ide_hwif_t *hwif = HWIF(drive);
  46         struct pci_dev *dev = hwif->pci_dev;
  47         u8 channel_offset = hwif->channel ? 0x74 : 0x70;
  48         u16 timing = 0;
  49         u32 triflex_timings = 0;
  50         u8 unit = (drive->select.b.unit & 0x01);
  51
  52         pci_read_config_dword(dev, channel_offset, &triflex_timings);
  53
  54         switch(speed) {
  55                 case XFER_MW_DMA_2:
  56                         timing = 0x0103;
  57                         break;
  58                 case XFER_MW_DMA_1:
  59                         timing = 0x0203;
  60                         break;
  61                 case XFER_MW_DMA_0:
  62                         timing = 0x0808;
  63                         break;
  64                 case XFER_SW_DMA_2:
  65                 case XFER_SW_DMA_1:
  66                 case XFER_SW_DMA_0:
  67                         timing = 0x0f0f;
  68                         break;
  69                 case XFER_PIO_4:
  70                         timing = 0x0202;
  71                         break;
  72                 case XFER_PIO_3:
  73                         timing = 0x0204;
  74                         break;
  75                 case XFER_PIO_2:
  76                         timing = 0x0404;
  77                         break;
  78                 case XFER_PIO_1:
  79                         timing = 0x0508;
  80                         break;
  81                 case XFER_PIO_0:
  82                         timing = 0x0808;
  83                         break;
  84                 default:
  85                         return -1;
  86         }
  87
  88         triflex_timings &= ~(0xFFFF << (16 * unit));
  89         triflex_timings |= (timing << (16 * unit));
  90
  91         pci_write_config_dword(dev, channel_offset, triflex_timings);
  92
  93         return (ide_config_drive_speed(drive, speed));
  94 }
  95
  96 static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
  97 {
  98         int use_pio = ide_get_best_pio_mode(drive, pio, 4);
  99         (void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
 100 }
 101
 102 static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
 103 {
 104         if (ide_tune_dma(drive))
 105                 return 0;
 106
 107         triflex_tune_drive(drive, 255);
 108
 109         return -1;
 110 }
 111
 112 static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
 113 {
 114         hwif->tuneproc = &triflex_tune_drive;
 115         hwif->speedproc = &triflex_tune_chipset;
 116
 117         if (hwif->dma_base == 0)
 118                 return;
 119
 120         hwif->atapi_dma  = 1;
 121         hwif->mwdma_mask = 0x07;
 122         hwif->swdma_mask = 0x07;
 123         hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
 124
 125         if (!noautodma)
 126                 hwif->autodma = 1;
 127         hwif->drives[0].autodma = hwif->autodma;
 128         hwif->drives[1].autodma = hwif->autodma;
 129 }
 130
 131 static ide_pci_device_t triflex_device __devinitdata = {
 132         .name           = "TRIFLEX",
 133         .init_hwif      = init_hwif_triflex,
 134         .autodma        = AUTODMA,
 135         .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
 136         .bootable       = ON_BOARD,
 137         .pio_mask       = ATA_PIO4,
 138 };
 139
 140 static int __devinit triflex_init_one(struct pci_dev *dev,
 141                 const struct pci_device_id *id)
 142 {
 143         return ide_setup_pci_device(dev, &triflex_device);
 144 }
 145
 146 static struct pci_device_id triflex_pci_tbl[] = {
 147         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
 148           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 149         { 0, },
 150 };
 151 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 152
 153 static struct pci_driver driver = {
 154         .name           = "TRIFLEX_IDE",
 155         .id_table       = triflex_pci_tbl,
 156         .probe          = triflex_init_one,
 157 };
 158
 159 static int __init triflex_ide_init(void)
 160 {
 161         return ide_pci_register_driver(&driver);
 162 }
 163
 164 module_init(triflex_ide_init);
 165
 166 MODULE_AUTHOR("Torben Mathiasen");
 167 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 168 MODULE_LICENSE("GPL");
 169
 170