i386/linux/linux-2.3.21/drivers/cdrom/isp16.c

   1 /* -- ISP16 cdrom detection and configuration
   2  *
   3  *    Copyright (c) 1995,1996 Eric van der Maarel <H.T.M.v.d.Maarel@marin.nl>
   4  *
   5  *    Version 0.6
   6  *
   7  *    History:
   8  *    0.5 First release.
   9  *        Was included in the sjcd and optcd cdrom drivers.
  10  *    0.6 First "stand-alone" version.
  11  *        Removed sound configuration.
  12  *        Added "module" support.
  13  *
  14  *    Detect cdrom interface on ISP16 sound card.
  15  *    Configure cdrom interface.
  16  *
  17  *    Algorithm for the card with OPTi 82C928 taken
  18  *    from the CDSETUP.SYS driver for MSDOS,
  19  *    by OPTi Computers, version 2.03.
  20  *    Algorithm for the card with OPTi 82C929 as communicated
  21  *    to me by Vadim Model and Leo Spiekman.
  22  *
  23  *    This program is free software; you can redistribute it and/or modify
  24  *    it under the terms of the GNU General Public License as published by
  25  *    the Free Software Foundation; either version 2 of the License, or
  26  *    (at your option) any later version.
  27  *
  28  *    This program is distributed in the hope that it will be useful,
  29  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  30  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  31  *    GNU General Public License for more details.
  32  *
  33  *    You should have received a copy of the GNU General Public License
  34  *    along with this program; if not, write to the Free Software
  35  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  36  *
  37  */
  38
  39 #define ISP16_VERSION_MAJOR 0
  40 #define ISP16_VERSION_MINOR 6
  41
  42 #ifdef MODULE
  43 #include <linux/module.h>
  44 #endif  /* MODULE */
  45
  46 #include <linux/fs.h>
  47 #include <linux/kernel.h>
  48 #include <linux/string.h>
  49 #include <linux/ioport.h>
  50 #include <linux/init.h>
  51 #include <asm/io.h>
  52 #include "isp16.h"
  53
  54 static short isp16_detect(void);
  55 static short isp16_c928__detect(void);
  56 static short isp16_c929__detect(void);
  57 static short isp16_cdi_config(int base, u_char drive_type, int irq, int dma);
  58 static short isp16_type; /* dependent on type of interface card */
  59 static u_char isp16_ctrl;
  60 static u_short isp16_enable_port;
  61
  62 static int isp16_cdrom_base = ISP16_CDROM_IO_BASE;
  63 static int isp16_cdrom_irq = ISP16_CDROM_IRQ;
  64 static int isp16_cdrom_dma = ISP16_CDROM_DMA;
  65 static char *isp16_cdrom_type = ISP16_CDROM_TYPE;
  66
  67 #ifdef MODULE
  68 MODULE_PARM(isp16_cdrom_base, "i");
  69 MODULE_PARM(isp16_cdrom_irq, "i");
  70 MODULE_PARM(isp16_cdrom_dma, "i");
  71 MODULE_PARM(isp16_cdrom_type, "s");
  72 int init_module(void);
  73 void cleanup_module(void);
  74 #endif
  75
  76 #define ISP16_IN(p) (outb(isp16_ctrl,ISP16_CTRL_PORT), inb(p))
  77 #define ISP16_OUT(p,b) (outb(isp16_ctrl,ISP16_CTRL_PORT), outb(b,p))
  78
  79
  80 void __init
  81 isp16_setup(char *str, int *ints)
  82 {
  83   if ( ints[0] > 0 )
  84     isp16_cdrom_base = ints[1];
  85   if ( ints[0] > 1 )
  86     isp16_cdrom_irq = ints[2];
  87   if ( ints[0] > 2 )
  88     isp16_cdrom_dma = ints[3];
  89   if ( str )
  90     isp16_cdrom_type = str;
  91 }
  92
  93 /*
  94  *  ISP16 initialisation.
  95  *
  96  */
  97 int __init
  98 isp16_init(void)
  99 {
 100   u_char expected_drive;
 101
 102   printk(KERN_INFO "ISP16: configuration cdrom interface, version %d.%d.\n", ISP16_VERSION_MAJOR,
 103     ISP16_VERSION_MINOR);
 104
 105   if ( !strcmp(isp16_cdrom_type, "noisp16") ) {
 106     printk("ISP16: no cdrom interface configured.\n");
 107     return(0);
 108   }
 109
 110   if (check_region(ISP16_IO_BASE, ISP16_IO_SIZE)) {
 111     printk("ISP16: i/o ports already in use.\n");
 112     return(-EIO);
 113   }
 114
 115   if ( (isp16_type=isp16_detect()) < 0 ) {
 116     printk("ISP16: no cdrom interface found.\n");
 117     return(-EIO);
 118   }
 119
 120   printk(KERN_INFO "ISP16: cdrom interface (with OPTi 82C92%d chip) detected.\n",
 121     (isp16_type==2) ? 9 : 8);
 122
 123   if ( !strcmp(isp16_cdrom_type, "Sanyo") )
 124     expected_drive = (isp16_type ? ISP16_SANYO1 : ISP16_SANYO0);
 125   else if ( !strcmp(isp16_cdrom_type, "Sony") )
 126     expected_drive = ISP16_SONY;
 127   else if ( !strcmp(isp16_cdrom_type, "Panasonic") )
 128     expected_drive = (isp16_type ? ISP16_PANASONIC1 : ISP16_PANASONIC0);
 129   else if ( !strcmp(isp16_cdrom_type, "Mitsumi") )
 130     expected_drive = ISP16_MITSUMI;
 131   else {
 132     printk("ISP16: %s not supported by cdrom interface.\n", isp16_cdrom_type);
 133     return(-EIO);
 134   }
 135
 136   if ( isp16_cdi_config(isp16_cdrom_base, expected_drive,
 137     isp16_cdrom_irq, isp16_cdrom_dma ) < 0) {
 138     printk("ISP16: cdrom interface has not been properly configured.\n");
 139     return(-EIO);
 140   }
 141   printk(KERN_INFO "ISP16: cdrom interface set up with io base 0x%03X, irq %d, dma %d,"
 142     " type %s.\n", isp16_cdrom_base, isp16_cdrom_irq, isp16_cdrom_dma,
 143     isp16_cdrom_type);
 144   return(0);
 145 }
 146
 147 static short __init
 148 isp16_detect(void)
 149 {
 150
 151   if ( isp16_c929__detect() >= 0 )
 152     return(2);
 153   else
 154     return(isp16_c928__detect());
 155 }
 156
 157 static short __init
 158 isp16_c928__detect(void)
 159 {
 160   u_char ctrl;
 161   u_char enable_cdrom;
 162   u_char io;
 163   short i = -1;
 164
 165   isp16_ctrl = ISP16_C928__CTRL;
 166   isp16_enable_port = ISP16_C928__ENABLE_PORT;
 167
 168   /* read' and write' are a special read and write, respectively */
 169
 170   /* read' ISP16_CTRL_PORT, clear last two bits and write' back the result */
 171   ctrl = ISP16_IN( ISP16_CTRL_PORT ) & 0xFC;
 172   ISP16_OUT( ISP16_CTRL_PORT, ctrl );
 173
 174   /* read' 3,4 and 5-bit from the cdrom enable port */
 175   enable_cdrom = ISP16_IN( ISP16_C928__ENABLE_PORT ) & 0x38;
 176
 177   if ( !(enable_cdrom & 0x20) ) {  /* 5-bit not set */
 178     /* read' last 2 bits of ISP16_IO_SET_PORT */
 179     io = ISP16_IN( ISP16_IO_SET_PORT ) & 0x03;
 180     if ( ((io&0x01)<<1) == (io&0x02) ) {  /* bits are the same */
 181       if ( io == 0 ) {  /* ...the same and 0 */
 182         i = 0;
 183         enable_cdrom |= 0x20;
 184       }
 185       else {  /* ...the same and 1 */  /* my card, first time 'round */
 186         i = 1;
 187         enable_cdrom |= 0x28;
 188       }
 189       ISP16_OUT( ISP16_C928__ENABLE_PORT, enable_cdrom );
 190     }
 191     else {  /* bits are not the same */
 192       ISP16_OUT( ISP16_CTRL_PORT, ctrl );
 193       return(i); /* -> not detected: possibly incorrect conclusion */
 194     }
 195   }
 196   else if ( enable_cdrom == 0x20 )
 197     i = 0;
 198   else if ( enable_cdrom == 0x28 )  /* my card, already initialised */
 199     i = 1;
 200
 201   ISP16_OUT( ISP16_CTRL_PORT, ctrl );
 202
 203   return(i);
 204 }
 205
 206 static short __init
 207 isp16_c929__detect(void)
 208 {
 209   u_char ctrl;
 210   u_char tmp;
 211
 212   isp16_ctrl = ISP16_C929__CTRL;
 213   isp16_enable_port = ISP16_C929__ENABLE_PORT;
 214
 215   /* read' and write' are a special read and write, respectively */
 216
 217   /* read' ISP16_CTRL_PORT and save */
 218   ctrl = ISP16_IN( ISP16_CTRL_PORT );
 219
 220   /* write' zero to the ctrl port and get response */
 221   ISP16_OUT( ISP16_CTRL_PORT, 0 );
 222   tmp = ISP16_IN( ISP16_CTRL_PORT );
 223
 224   if ( tmp != 2 )  /* isp16 with 82C929 not detected */
 225     return(-1);
 226
 227   /* restore ctrl port value */
 228   ISP16_OUT( ISP16_CTRL_PORT, ctrl );
 229
 230   return(2);
 231 }
 232
 233 static short __init
 234 isp16_cdi_config(int base, u_char drive_type, int irq, int dma)
 235 {
 236   u_char base_code;
 237   u_char irq_code;
 238   u_char dma_code;
 239   u_char i;
 240
 241   if ( (drive_type == ISP16_MITSUMI) && (dma != 0) )
 242     printk("ISP16: Mitsumi cdrom drive has no dma support.\n");
 243
 244   switch (base) {
 245   case 0x340: base_code = ISP16_BASE_340; break;
 246   case 0x330: base_code = ISP16_BASE_330; break;
 247   case 0x360: base_code = ISP16_BASE_360; break;
 248   case 0x320: base_code = ISP16_BASE_320; break;
 249   default:
 250     printk("ISP16: base address 0x%03X not supported by cdrom interface.\n",
 251       base);
 252     return(-1);
 253   }
 254   switch (irq) {
 255   case 0: irq_code = ISP16_IRQ_X; break; /* disable irq */
 256   case 5: irq_code = ISP16_IRQ_5;
 257           printk("ISP16: irq 5 shouldn't be used by cdrom interface,"
 258             " due to possible conflicts with the sound card.\n");
 259           break;
 260   case 7: irq_code = ISP16_IRQ_7;
 261           printk("ISP16: irq 7 shouldn't be used by cdrom interface,"
 262             " due to possible conflicts with the sound card.\n");
 263           break;
 264   case 3: irq_code = ISP16_IRQ_3; break;
 265   case 9: irq_code = ISP16_IRQ_9; break;
 266   case 10: irq_code = ISP16_IRQ_10; break;
 267   case 11: irq_code = ISP16_IRQ_11; break;
 268   default:
 269     printk("ISP16: irq %d not supported by cdrom interface.\n", irq );
 270     return(-1);
 271   }
 272   switch (dma) {
 273   case 0: dma_code = ISP16_DMA_X; break;  /* disable dma */
 274   case 1: printk("ISP16: dma 1 cannot be used by cdrom interface,"
 275             " due to conflict with the sound card.\n");
 276           return(-1); break;
 277   case 3: dma_code = ISP16_DMA_3; break;
 278   case 5: dma_code = ISP16_DMA_5; break;
 279   case 6: dma_code = ISP16_DMA_6; break;
 280   case 7: dma_code = ISP16_DMA_7; break;
 281   default:
 282     printk("ISP16: dma %d not supported by cdrom interface.\n", dma);
 283     return(-1);
 284   }
 285
 286   if ( drive_type != ISP16_SONY && drive_type != ISP16_PANASONIC0 &&
 287     drive_type != ISP16_PANASONIC1 && drive_type != ISP16_SANYO0 &&
 288     drive_type != ISP16_SANYO1 && drive_type != ISP16_MITSUMI &&
 289     drive_type != ISP16_DRIVE_X ) {
 290     printk("ISP16: drive type (code 0x%02X) not supported by cdrom"
 291      " interface.\n", drive_type );
 292     return(-1);
 293   }
 294
 295   /* set type of interface */
 296   i = ISP16_IN(ISP16_DRIVE_SET_PORT) & ISP16_DRIVE_SET_MASK;  /* clear some bits */
 297   ISP16_OUT( ISP16_DRIVE_SET_PORT, i|drive_type );
 298
 299   /* enable cdrom on interface with 82C929 chip */
 300   if ( isp16_type > 1 )
 301     ISP16_OUT( isp16_enable_port, ISP16_ENABLE_CDROM );
 302
 303   /* set base address, irq and dma */
 304   i = ISP16_IN(ISP16_IO_SET_PORT) & ISP16_IO_SET_MASK;  /* keep some bits */
 305   ISP16_OUT( ISP16_IO_SET_PORT, i|base_code|irq_code|dma_code );
 306
 307   return(0);
 308 }
 309
 310 #ifdef MODULE
 311 int init_module(void)
 312 {
 313   return isp16_init();
 314 }
 315
 316 void cleanup_module(void)
 317 {
 318         release_region(ISP16_IO_BASE, ISP16_IO_SIZE);
 319         printk(KERN_INFO "ISP16: module released.\n");
 320 }
 321 #endif /* MODULE */