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 #include "triflex.h"
  45
  46 static struct pci_dev *triflex_dev;
  47
  48 #ifdef CONFIG_PROC_FS
  49 static int triflex_get_info(char *buf, char **addr, off_t offset, int count)
  50 {
  51         char *p = buf;
  52         int len;
  53
  54         struct pci_dev *dev     = triflex_dev;
  55         unsigned long bibma = pci_resource_start(dev, 4);
  56         u8  c0 = 0, c1 = 0;
  57         u32 pri_timing, sec_timing;
  58
  59         p += sprintf(p, "\n                                Compaq Triflex Chipset\n");
  60
  61         pci_read_config_dword(dev, 0x70, &pri_timing);
  62         pci_read_config_dword(dev, 0x74, &sec_timing);
  63
  64         /*
  65          * at that point bibma+0x2 et bibma+0xa are byte registers
  66          * to investigate:
  67          */
  68         c0 = inb((unsigned short)bibma + 0x02);
  69         c1 = inb((unsigned short)bibma + 0x0a);
  70
  71         p += sprintf(p, "--------------- Primary Channel "
  72                         "---------------- Secondary Channel "
  73                         "-------------\n");
  74         p += sprintf(p, "                %sabled "
  75                         "                        %sabled\n",
  76                         (c0&0x80) ? "dis" : " en",
  77                         (c1&0x80) ? "dis" : " en");
  78         p += sprintf(p, "--------------- drive0 --------- drive1 "
  79                         "-------- drive0 ---------- drive1 ------\n");
  80         p += sprintf(p, "DMA enabled:    %s              %s "
  81                         "            %s               %s\n",
  82                         (c0&0x20) ? "yes" : "no ",
  83                         (c0&0x40) ? "yes" : "no ",
  84                         (c1&0x20) ? "yes" : "no ",
  85                         (c1&0x40) ? "yes" : "no " );
  86
  87         p += sprintf(p, "DMA\n");
  88         p += sprintf(p, "PIO\n");
  89
  90         len = (p - buf) - offset;
  91         *addr = buf + offset;
  92
  93         return len > count ? count : len;
  94 }
  95 #endif
  96
  97 static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
  98 {
  99         ide_hwif_t *hwif = HWIF(drive);
 100         struct pci_dev *dev = hwif->pci_dev;
 101         u8 channel_offset = hwif->channel ? 0x74 : 0x70;
 102         u16 timing = 0;
 103         u32 triflex_timings = 0;
 104         u8 unit = (drive->select.b.unit & 0x01);
 105         u8 speed = ide_rate_filter(0, xferspeed);
 106
 107         pci_read_config_dword(dev, channel_offset, &triflex_timings);
 108
 109         switch(speed) {
 110                 case XFER_MW_DMA_2:
 111                         timing = 0x0103;
 112                         break;
 113                 case XFER_MW_DMA_1:
 114                         timing = 0x0203;
 115                         break;
 116                 case XFER_MW_DMA_0:
 117                         timing = 0x0808;
 118                         break;
 119                 case XFER_SW_DMA_2:
 120                 case XFER_SW_DMA_1:
 121                 case XFER_SW_DMA_0:
 122                         timing = 0x0f0f;
 123                         break;
 124                 case XFER_PIO_4:
 125                         timing = 0x0202;
 126                         break;
 127                 case XFER_PIO_3:
 128                         timing = 0x0204;
 129                         break;
 130                 case XFER_PIO_2:
 131                         timing = 0x0404;
 132                         break;
 133                 case XFER_PIO_1:
 134                         timing = 0x0508;
 135                         break;
 136                 case XFER_PIO_0:
 137                         timing = 0x0808;
 138                         break;
 139                 default:
 140                         return -1;
 141         }
 142
 143         triflex_timings &= ~(0xFFFF << (16 * unit));
 144         triflex_timings |= (timing << (16 * unit));
 145
 146         pci_write_config_dword(dev, channel_offset, triflex_timings);
 147
 148         return (ide_config_drive_speed(drive, speed));
 149 }
 150
 151 static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
 152 {
 153         int use_pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
 154         (void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
 155 }
 156
 157 static int triflex_config_drive_for_dma(ide_drive_t *drive)
 158 {
 159         int speed = ide_dma_speed(drive, 0); /* No ultra speeds */
 160
 161         if (!speed) {
 162                 u8 pspeed = ide_get_best_pio_mode(drive, 255, 4, NULL);
 163                 speed = XFER_PIO_0 + pspeed;
 164         }
 165
 166         (void) triflex_tune_chipset(drive, speed);
 167          return ide_dma_enable(drive);
 168 }
 169
 170 static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
 171 {
 172         ide_hwif_t *hwif        = HWIF(drive);
 173         struct hd_driveid *id   = drive->id;
 174
 175         if (id && (id->capability & 1) && drive->autodma) {
 176                 if (__ide_dma_bad_drive(drive))
 177                         goto tune_pio;
 178                 if (id->field_valid & 2) {
 179                         if ((id->dma_mword & hwif->mwdma_mask) ||
 180                                 (id->dma_1word & hwif->swdma_mask)) {
 181                                 if (!triflex_config_drive_for_dma(drive))
 182                                         goto tune_pio;
 183                         }
 184                 } else
 185                         goto tune_pio;
 186         } else {
 187 tune_pio:
 188                 hwif->tuneproc(drive, 255);
 189                 return hwif->ide_dma_off_quietly(drive);
 190         }
 191
 192         return hwif->ide_dma_on(drive);
 193 }
 194
 195 static void __init init_hwif_triflex(ide_hwif_t *hwif)
 196 {
 197         hwif->tuneproc = &triflex_tune_drive;
 198         hwif->speedproc = &triflex_tune_chipset;
 199
 200         hwif->atapi_dma  = 1;
 201         hwif->mwdma_mask = 0x07;
 202         hwif->swdma_mask = 0x07;
 203         hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
 204
 205         if (!noautodma)
 206                 hwif->autodma = 1;
 207         hwif->drives[0].autodma = hwif->autodma;
 208         hwif->drives[1].autodma = hwif->autodma;
 209 }
 210
 211 static unsigned int __init init_chipset_triflex(struct pci_dev *dev,
 212                 const char *name)
 213 {
 214 #ifdef CONFIG_PROC_FS
 215         ide_pci_create_host_proc("triflex", triflex_get_info);
 216 #endif
 217         return 0;
 218 }
 219
 220 static int __devinit triflex_init_one(struct pci_dev *dev,
 221                 const struct pci_device_id *id)
 222 {
 223         ide_pci_device_t *d = &triflex_devices[id->driver_data];
 224         if (dev->device != d->device)
 225                 BUG();
 226
 227         ide_setup_pci_device(dev, d);
 228         triflex_dev = dev;
 229
 230         return 0;
 231 }
 232
 233 static struct pci_driver driver = {
 234         .name           = "TRIFLEX IDE",
 235         .id_table       = triflex_pci_tbl,
 236         .probe          = triflex_init_one,
 237 };
 238
 239 static int triflex_ide_init(void)
 240 {
 241         return ide_pci_register_driver(&driver);
 242 }
 243
 244 module_init(triflex_ide_init);
 245
 246 MODULE_AUTHOR("Torben Mathiasen");
 247 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 248 MODULE_LICENSE("GPL");
 249
 250