SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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/config.h>
  31 #include <linux/types.h>
  32 #include <linux/module.h>
  33 #include <linux/kernel.h>
  34 #include <linux/delay.h>
  35 #include <linux/timer.h>
  36 #include <linux/mm.h>
  37 #include <linux/ioport.h>
  38 #include <linux/blkdev.h>
  39 #include <linux/hdreg.h>
  40 #include <linux/pci.h>
  41 #include <linux/ide.h>
  42 #include <linux/init.h>
  43
  44 static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
  45 {
  46         ide_hwif_t *hwif = HWIF(drive);
  47         struct pci_dev *dev = hwif->pci_dev;
  48         u8 channel_offset = hwif->channel ? 0x74 : 0x70;
  49         u16 timing = 0;
  50         u32 triflex_timings = 0;
  51         u8 unit = (drive->select.b.unit & 0x01);
  52         u8 speed = ide_rate_filter(0, xferspeed);
  53
  54         pci_read_config_dword(dev, channel_offset, &triflex_timings);
  55
  56         switch(speed) {
  57                 case XFER_MW_DMA_2:
  58                         timing = 0x0103;
  59                         break;
  60                 case XFER_MW_DMA_1:
  61                         timing = 0x0203;
  62                         break;
  63                 case XFER_MW_DMA_0:
  64                         timing = 0x0808;
  65                         break;
  66                 case XFER_SW_DMA_2:
  67                 case XFER_SW_DMA_1:
  68                 case XFER_SW_DMA_0:
  69                         timing = 0x0f0f;
  70                         break;
  71                 case XFER_PIO_4:
  72                         timing = 0x0202;
  73                         break;
  74                 case XFER_PIO_3:
  75                         timing = 0x0204;
  76                         break;
  77                 case XFER_PIO_2:
  78                         timing = 0x0404;
  79                         break;
  80                 case XFER_PIO_1:
  81                         timing = 0x0508;
  82                         break;
  83                 case XFER_PIO_0:
  84                         timing = 0x0808;
  85                         break;
  86                 default:
  87                         return -1;
  88         }
  89
  90         triflex_timings &= ~(0xFFFF << (16 * unit));
  91         triflex_timings |= (timing << (16 * unit));
  92
  93         pci_write_config_dword(dev, channel_offset, triflex_timings);
  94
  95         return (ide_config_drive_speed(drive, speed));
  96 }
  97
  98 static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
  99 {
 100         int use_pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
 101         (void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
 102 }
 103
 104 static int triflex_config_drive_for_dma(ide_drive_t *drive)
 105 {
 106         int speed = ide_dma_speed(drive, 0); /* No ultra speeds */
 107
 108         if (!speed) {
 109                 u8 pspeed = ide_get_best_pio_mode(drive, 255, 4, NULL);
 110                 speed = XFER_PIO_0 + pspeed;
 111         }
 112
 113         (void) triflex_tune_chipset(drive, speed);
 114          return ide_dma_enable(drive);
 115 }
 116
 117 static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
 118 {
 119         ide_hwif_t *hwif        = HWIF(drive);
 120         struct hd_driveid *id   = drive->id;
 121
 122         if ((id->capability & 1) && drive->autodma) {
 123                 if (ide_use_dma(drive)) {
 124                         if (triflex_config_drive_for_dma(drive))
 125                                 return hwif->ide_dma_on(drive);
 126                 }
 127         }
 128
 129         hwif->tuneproc(drive, 255);
 130         return hwif->ide_dma_off_quietly(drive);
 131 }
 132
 133 static void __init init_hwif_triflex(ide_hwif_t *hwif)
 134 {
 135         hwif->tuneproc = &triflex_tune_drive;
 136         hwif->speedproc = &triflex_tune_chipset;
 137
 138         hwif->atapi_dma  = 1;
 139         hwif->mwdma_mask = 0x07;
 140         hwif->swdma_mask = 0x07;
 141         hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
 142
 143         if (!noautodma)
 144                 hwif->autodma = 1;
 145         hwif->drives[0].autodma = hwif->autodma;
 146         hwif->drives[1].autodma = hwif->autodma;
 147 }
 148
 149 static ide_pci_device_t triflex_device __devinitdata = {
 150         .name           = "TRIFLEX",
 151         .init_hwif      = init_hwif_triflex,
 152         .channels       = 2,
 153         .autodma        = AUTODMA,
 154         .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
 155         .bootable       = ON_BOARD,
 156 };
 157
 158 static int __devinit triflex_init_one(struct pci_dev *dev,
 159                 const struct pci_device_id *id)
 160 {
 161         return ide_setup_pci_device(dev, &triflex_device);
 162 }
 163
 164 static struct pci_device_id triflex_pci_tbl[] = {
 165         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
 166           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 167         { 0, },
 168 };
 169 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
 170
 171 static struct pci_driver driver = {
 172         .name           = "TRIFLEX_IDE",
 173         .id_table       = triflex_pci_tbl,
 174         .probe          = triflex_init_one,
 175 };
 176
 177 static int triflex_ide_init(void)
 178 {
 179         return ide_pci_register_driver(&driver);
 180 }
 181
 182 module_init(triflex_ide_init);
 183
 184 MODULE_AUTHOR("Torben Mathiasen");
 185 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 186 MODULE_LICENSE("GPL");
 187
 188