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 "ide_modes.h"
  45 #include "triflex.h"
  46
  47 #ifdef CONFIG_PROC_FS
  48 static u8 triflex_proc;
  49
  50 #define TRIFLEX_MAX_DEVS        2
  51 static struct pci_dev *triflex_devs[TRIFLEX_MAX_DEVS];
  52 static unsigned int n_triflex_devs;
  53
  54 static int triflex_info(char *buffer, struct pci_dev *dev)
  55 {
  56         unsigned long bibma = pci_resource_start(dev, 4);
  57         char *p = buffer;
  58         u8  c0 = 0, c1 = 0;
  59         u32 pri_timing, sec_timing;
  60
  61         p += sprintf(p, "\n                                Compaq Triflex Chipset\n");
  62
  63         pci_read_config_dword(dev, 0x70, &pri_timing);
  64         pci_read_config_dword(dev, 0x74, &sec_timing);
  65
  66         /*
  67          * at that point bibma+0x2 et bibma+0xa are byte registers
  68          * to investigate:
  69          */
  70         c0 = inb((unsigned short)bibma + 0x02);
  71         c1 = inb((unsigned short)bibma + 0x0a);
  72
  73         p += sprintf(p, "--------------- Primary Channel "
  74                         "---------------- Secondary Channel "
  75                         "-------------\n");
  76         p += sprintf(p, "                %sabled "
  77                         "                        %sabled\n",
  78                         (c0&0x80) ? "dis" : " en",
  79                         (c1&0x80) ? "dis" : " en");
  80         p += sprintf(p, "--------------- drive0 --------- drive1 "
  81                         "-------- drive0 ---------- drive1 ------\n");
  82         p += sprintf(p, "DMA enabled:    %s              %s "
  83                         "            %s               %s\n",
  84                         (c0&0x20) ? "yes" : "no ",
  85                         (c0&0x40) ? "yes" : "no ",
  86                         (c1&0x20) ? "yes" : "no ",
  87                         (c1&0x40) ? "yes" : "no " );
  88
  89         p += sprintf(p, "DMA\n");
  90         p += sprintf(p, "PIO\n");
  91
  92         return p - buffer;
  93 }
  94
  95 static int triflex_get_info(char *buf, char **addr, off_t offset, int count)
  96 {
  97         char *p = buf;
  98         unsigned int i, len;
  99
 100         for (i = 0; i < n_triflex_devs; i++)
 101                 buf += triflex_info(buf, triflex_devs[i]);
 102
 103         len = (p - buf) - offset;
 104         *addr = buf + offset;
 105
 106         return len > count ? count : len;
 107 }
 108 #endif
 109
 110 static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
 111 {
 112         ide_hwif_t *hwif = HWIF(drive);
 113         struct pci_dev *dev = hwif->pci_dev;
 114         u8 channel_offset = hwif->channel ? 0x74 : 0x70;
 115         u16 timing = 0;
 116         u32 triflex_timings = 0;
 117         u8 unit = (drive->select.b.unit & 0x01);
 118         u8 speed = ide_rate_filter(0, xferspeed);
 119
 120         pci_read_config_dword(dev, channel_offset, &triflex_timings);
 121
 122         switch(speed) {
 123                 case XFER_MW_DMA_2:
 124                         timing = 0x0103;
 125                         break;
 126                 case XFER_MW_DMA_1:
 127                         timing = 0x0203;
 128                         break;
 129                 case XFER_MW_DMA_0:
 130                         timing = 0x0808;
 131                         break;
 132                 case XFER_SW_DMA_2:
 133                 case XFER_SW_DMA_1:
 134                 case XFER_SW_DMA_0:
 135                         timing = 0x0f0f;
 136                         break;
 137                 case XFER_PIO_4:
 138                         timing = 0x0202;
 139                         break;
 140                 case XFER_PIO_3:
 141                         timing = 0x0204;
 142                         break;
 143                 case XFER_PIO_2:
 144                         timing = 0x0404;
 145                         break;
 146                 case XFER_PIO_1:
 147                         timing = 0x0508;
 148                         break;
 149                 case XFER_PIO_0:
 150                         timing = 0x0808;
 151                         break;
 152                 default:
 153                         return -1;
 154         }
 155
 156         triflex_timings &= ~(0xFFFF << (16 * unit));
 157         triflex_timings |= (timing << (16 * unit));
 158
 159         pci_write_config_dword(dev, channel_offset, triflex_timings);
 160
 161         return (ide_config_drive_speed(drive, speed));
 162 }
 163
 164 static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
 165 {
 166         int use_pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
 167         (void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
 168 }
 169
 170 static int triflex_config_drive_for_dma(ide_drive_t *drive)
 171 {
 172         int speed = ide_dma_speed(drive, 0); /* No ultra speeds */
 173
 174         if (!speed) {
 175                 u8 pspeed = ide_get_best_pio_mode(drive, 255, 4, NULL);
 176                 speed = XFER_PIO_0 + pspeed;
 177         }
 178
 179         (void) triflex_tune_chipset(drive, speed);
 180          return ide_dma_enable(drive);
 181 }
 182
 183 static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
 184 {
 185         ide_hwif_t *hwif        = HWIF(drive);
 186         struct hd_driveid *id   = drive->id;
 187
 188         if ((id->capability & 1) && drive->autodma) {
 189                 if (hwif->ide_dma_bad_drive(drive))
 190                         goto tune_pio;
 191                 if (id->field_valid & 2) {
 192                         if ((id->dma_mword & hwif->mwdma_mask) ||
 193                                 (id->dma_1word & hwif->swdma_mask)) {
 194                                 if (!triflex_config_drive_for_dma(drive))
 195                                         goto tune_pio;
 196                         }
 197                 } else
 198                         goto tune_pio;
 199         } else {
 200 tune_pio:
 201                 hwif->tuneproc(drive, 255);
 202                 return hwif->ide_dma_off_quietly(drive);
 203         }
 204
 205         return hwif->ide_dma_on(drive);
 206 }
 207
 208 static void __init init_hwif_triflex(ide_hwif_t *hwif)
 209 {
 210         hwif->tuneproc = &triflex_tune_drive;
 211         hwif->speedproc = &triflex_tune_chipset;
 212
 213         hwif->atapi_dma  = 1;
 214         hwif->mwdma_mask = 0x07;
 215         hwif->swdma_mask = 0x07;
 216         hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
 217
 218         if (!noautodma)
 219                 hwif->autodma = 1;
 220         hwif->drives[0].autodma = hwif->autodma;
 221         hwif->drives[1].autodma = hwif->autodma;
 222 }
 223
 224 static unsigned int __init init_chipset_triflex(struct pci_dev *dev,
 225                 const char *name)
 226 {
 227 #ifdef CONFIG_PROC_FS
 228         triflex_devs[n_triflex_devs++] = dev;
 229         if (!triflex_proc) {
 230                 triflex_proc = 1;
 231                 ide_pci_register_host_proc(&triflex_procs);
 232         }
 233 #endif
 234         return 0;
 235 }
 236
 237 static int __devinit triflex_init_one(struct pci_dev *dev,
 238                 const struct pci_device_id *id)
 239 {
 240         ide_pci_device_t *d = &triflex_devices[id->driver_data];
 241         if (dev->device != d->device)
 242                 BUG();
 243
 244         ide_setup_pci_device(dev, d);
 245         MOD_INC_USE_COUNT;
 246
 247         return 0;
 248 }
 249
 250 static struct pci_driver driver = {
 251         .name           = "TRIFLEX IDE",
 252         .id_table       = triflex_pci_tbl,
 253         .probe          = triflex_init_one,
 254 };
 255
 256 static int triflex_ide_init(void)
 257 {
 258         return ide_pci_register_driver(&driver);
 259 }
 260
 261 static void triflex_ide_exit(void)
 262 {
 263         ide_pci_unregister_driver(&driver);
 264 }
 265
 266 module_init(triflex_ide_init);
 267 module_exit(triflex_ide_exit);
 268
 269 MODULE_AUTHOR("Torben Mathiasen");
 270 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
 271 MODULE_LICENSE("GPL");
 272
 273