release/src-rt-6.x/linux/linux-2.6/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, u8 xferspeed)
  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         u8 speed = ide_rate_filter(drive, xferspeed);
  52
  53         pci_read_config_dword(dev, channel_offset, &triflex_timings);
  54
  55         switch(speed) {
  56                 case XFER_MW_DMA_2:
  57                         timing = 0x0103;
  58                         break;
  59                 case XFER_MW_DMA_1:
  60                         timing = 0x0203;
  61                         break;
  62                 case XFER_MW_DMA_0:
  63                         timing = 0x0808;
  64                         break;
  65                 case XFER_SW_DMA_2:
  66                 case XFER_SW_DMA_1:
  67                 case XFER_SW_DMA_0:
  68                         timing = 0x0f0f;
  69                         break;
  70                 case XFER_PIO_4:
  71                         timing = 0x0202;
  72                         break;
  73                 case XFER_PIO_3:
  74                         timing = 0x0204;
  75                         break;
  76                 case XFER_PIO_2:
  77                         timing = 0x0404;
  78                         break;
  79                 case XFER_PIO_1:
  80                         timing = 0x0508;
  81                         break;
  82                 case XFER_PIO_0:
  83                         timing = 0x0808;
  84                         break;
  85                 default:
  86                         return -1;
  87         }
  88
  89         triflex_timings &= ~(0xFFFF << (16 * unit));
  90         triflex_timings |= (timing << (16 * unit));
  91
  92         pci_write_config_dword(dev, channel_offset, triflex_timings);
  93
  94         return (ide_config_drive_speed(drive, speed));
  95 }
  96
  97 static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
  98 {
  99         int use_pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
 100         (void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
 101 }
 102
 103 static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
 104 {
 105         if (ide_tune_dma(drive))
 106                 return 0;
 107
 108         triflex_tune_drive(drive, 255);
 109
 110         return -1;
 111 }
 112
 113 static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
 114 {
 115         hwif->tuneproc = &triflex_tune_drive;
 116         hwif->speedproc = &triflex_tune_chipset;
 117
 118         hwif->atapi_dma  = 1;
 119         hwif->mwdma_mask = 0x07;
 120         hwif->swdma_mask = 0x07;
 121         hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
 122
 123         if (!noautodma)
 124                 hwif->autodma = 1;
 125         hwif->drives[0].autodma = hwif->autodma;
 126         hwif->drives[1].autodma = hwif->autodma;
 127 }
 128
 129 static ide_pci_device_t triflex_device __devinitdata = {
 130         .name           = "TRIFLEX",
 131         .init_hwif      = init_hwif_triflex,
 132         .channels       = 2,
 133         .autodma        = AUTODMA,
 134         .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
 135         .bootable       = ON_BOARD,
 136 };
 137
 138 static int __devinit triflex_init_one(struct pci_dev *dev,
 139                 const struct pci_device_id *id)
 140 {
 141         return ide_setup_pci_device(dev, &triflex_device);
 142 }
 143
 144 static struct pci_device_id triflex_pci_tbl[] = {
 145         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
 146           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 147         { 0, },
 148 };
 149 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 150
 151 static struct pci_driver driver = {
 152         .name           = "TRIFLEX_IDE",
 153         .id_table       = triflex_pci_tbl,
 154         .probe          = triflex_init_one,
 155 };
 156
 157 static int __init triflex_ide_init(void)
 158 {
 159         return ide_pci_register_driver(&driver);
 160 }
 161
 162 module_init(triflex_ide_init);
 163
 164 MODULE_AUTHOR("Torben Mathiasen");
 165 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 166 MODULE_LICENSE("GPL");
 167
 168