drivers/sound/cs4232.c

/* */
This source file includes following definitions.
CS_OUT
probe_cs4232_mpu
attach_cs4232_mpu
probe_cs4232
attach_cs4232
unload_cs4232
unload_cs4232_mpu
   1 /*
   2  * sound/cs4232.c
   3  *
   4  * The low level driver for Crystal CS4232 based cards. The CS4232 is
   5  * a PnP compatible chip which contains a CS4231A codec, SB emulation,
   6  * a MPU401 compatible MIDI port, joystick and synthesizer and IDE CD-ROM 
   7  * interfaces. This is just a temporary driver until full PnP support
   8  * gets inplemented. Just the WSS codec, FM synth and the MIDI ports are
   9  * supported. Other interfaces are left uninitialized.
  10  */
  11 /*
  12  * Copyright by Hannu Savolainen 1993-1996
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: 1. Redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer. 2.
  18  * Redistributions in binary form must reproduce the above copyright notice,
  19  * this list of conditions and the following disclaimer in the documentation
  20  * and/or other materials provided with the distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
  23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  25  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  26  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  29  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34 #include <linux/config.h>
  35 
  36 
  37 #include "sound_config.h"
  38 
  39 #if defined(CONFIG_CS4232)
  40 
  41 #define KEY_PORT        0x279   /* Same as LPT1 status port */
  42 #define CSN_NUM         0x99    /* Just a random number */
  43 
  44 static int     *osp;
  45 
  46 static void 
  47 CS_OUT (unsigned char a)
     /*  */
  48 {
  49   outb (a, KEY_PORT);
  50 }
  51 #define CS_OUT2(a, b)           {CS_OUT(a);CS_OUT(b);}
  52 #define CS_OUT3(a, b, c)        {CS_OUT(a);CS_OUT(b);CS_OUT(c);}
  53 
  54 static int      mpu_base = 0, mpu_irq = 0;
  55 static int      mpu_detected = 0;
  56 
  57 int
  58 probe_cs4232_mpu (struct address_info *hw_config)
     /*  */
  59 {
  60 /*
  61  * Just write down the config values.
  62  */
  63 
  64   mpu_base = hw_config->io_base;
  65   mpu_irq = hw_config->irq;
  66 
  67   return 0;
  68 }
  69 
  70 long
  71 attach_cs4232_mpu (long mem_start, struct address_info *hw_config)
     /*  */
  72 {
  73   return mem_start;
  74 }
  75 
  76 static unsigned char crystal_key[] =    /* A 32 byte magic key sequence */
  77 {
  78   0x96, 0x35, 0x9a, 0xcd, 0xe6, 0xf3, 0x79, 0xbc,
  79   0x5e, 0xaf, 0x57, 0x2b, 0x15, 0x8a, 0xc5, 0xe2,
  80   0xf1, 0xf8, 0x7c, 0x3e, 0x9f, 0x4f, 0x27, 0x13,
  81   0x09, 0x84, 0x42, 0xa1, 0xd0, 0x68, 0x34, 0x1a
  82 };
  83 
  84 int
  85 probe_cs4232 (struct address_info *hw_config)
     /*  */
  86 {
  87   int             i, n;
  88   int             base = hw_config->io_base, irq = hw_config->irq;
  89   int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
  90 
  91   osp = hw_config->osp;
  92 
  93 /*
  94  * Verify that the I/O port range is free.
  95  */
  96 
  97   if (check_region (base, 4))
  98     {
  99       printk ("cs4232.c: I/O port 0x%03x not free\n", base);
 100       return 0;
 101     }
 102 
 103   if (ad1848_detect (hw_config->io_base, NULL, hw_config->osp))
 104     return 1;                   /* The card is already active */
 105 
 106 /*
 107  * This version of the driver doesn't use the PnP method when configuring
 108  * the card but a simplified method defined by Crystal. This means that
 109  * just one CS4232 compatible device can exist on the system. Also this
 110  * method conflicts with possible PnP support in the OS. For this reason 
 111  * driver is just a temporary kludge.
 112  */
 113 
 114 /*
 115  * Repeat initialization few times since it doesn't always succeed in
 116  * first time.
 117  */
 118 
 119   for (n = 0; n < 4; n++)
 120     {
 121 /*
 122  * Wake up the card by sending a 32 byte Crystal key to the key port.
 123  */
 124       for (i = 0; i < 32; i++)
 125         CS_OUT (crystal_key[i]);
 126 
 127 /*
 128  * Now set the CSN (Card Select Number).
 129  */
 130 
 131       CS_OUT2 (0x06, CSN_NUM);
 132 
 133 
 134 /*
 135  * Then set some config bytes. First logical device 0 
 136  */
 137 
 138       CS_OUT2 (0x15, 0x00);     /* Select logical device 0 (WSS/SB/FM) */
 139       CS_OUT3 (0x47, (base >> 8) & 0xff, base & 0xff);  /* WSSbase */
 140 
 141       if (check_region (0x388, 4))      /* Not free */
 142         CS_OUT3 (0x48, 0x00, 0x00)      /* FMbase off */
 143           else
 144         CS_OUT3 (0x48, 0x03, 0x88);     /* FMbase 0x388 */
 145 
 146       CS_OUT3 (0x42, 0x00, 0x00);       /* SBbase off */
 147       CS_OUT2 (0x22, irq);      /* SB+WSS IRQ */
 148       CS_OUT2 (0x2a, dma1);     /* SB+WSS DMA */
 149 
 150       if (dma2 != -1)
 151         CS_OUT2 (0x25, dma2)    /* WSS DMA2 */
 152           else
 153         CS_OUT2 (0x25, 4);      /* No WSS DMA2 */
 154 
 155       CS_OUT2 (0x33, 0x01);     /* Activate logical dev 0 */
 156 
 157 /*
 158  * Initialize logical device 3 (MPU)
 159  */
 160 
 161 #if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
 162       if (mpu_base != 0 && mpu_irq != 0)
 163         {
 164           CS_OUT2 (0x15, 0x03); /* Select logical device 3 (MPU) */
 165           CS_OUT3 (0x47, (mpu_base >> 8) & 0xff, mpu_base & 0xff);      /* MPUbase */
 166           CS_OUT2 (0x22, mpu_irq);      /* MPU IRQ */
 167           CS_OUT2 (0x33, 0x01); /* Activate logical dev 3 */
 168         }
 169 #endif
 170 
 171 /*
 172  * Finally activate the chip
 173  */
 174       CS_OUT (0x79);
 175 
 176 /*
 177  * Then try to detect the codec part of the chip
 178  */
 179 
 180       if (ad1848_detect (hw_config->io_base, NULL, hw_config->osp))
 181         return 1;
 182     }
 183 
 184   return 0;
 185 }
 186 
 187 long
 188 attach_cs4232 (long mem_start, struct address_info *hw_config)
     /*  */
 189 {
 190   int             base = hw_config->io_base, irq = hw_config->irq;
 191   int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
 192 
 193   if (dma2 == -1)
 194     dma2 = dma1;
 195 
 196   ad1848_init ("CS4232", base,
 197                irq,
 198                dma1,            /* Playback DMA */
 199                dma2,            /* Capture DMA */
 200                0,
 201                hw_config->osp);
 202 
 203 #if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
 204   if (mpu_base != 0 && mpu_irq != 0)
 205     {
 206       static struct address_info hw_config2 =
 207       {0};                      /* Ensure it's initialized */
 208 
 209       hw_config2.io_base = mpu_base;
 210       hw_config2.irq = mpu_irq;
 211       hw_config2.dma = -1;
 212       hw_config2.dma2 = -1;
 213       hw_config2.always_detect = 0;
 214       hw_config2.name = NULL;
 215       hw_config2.driver_use_1 = 0;
 216       hw_config2.driver_use_2 = 0;
 217       hw_config2.card_subtype = 0;
 218       hw_config2.osp = hw_config->osp;
 219 
 220       if (probe_mpu401 (&hw_config2))
 221         {
 222           mpu_detected = 1;
 223           mem_start = attach_mpu401 (mem_start, &hw_config2);
 224         }
 225       else
 226         {
 227           mpu_base = mpu_irq = 0;
 228         }
 229     }
 230 #endif
 231   return mem_start;
 232 }
 233 
 234 void
 235 unload_cs4232 (struct address_info *hw_config)
     /*  */
 236 {
 237   int             base = hw_config->io_base, irq = hw_config->irq;
 238   int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
 239 
 240   if (dma2 == -1)
 241     dma2 = dma1;
 242 
 243   ad1848_unload (base,
 244                  irq,
 245                  dma1,          /* Playback DMA */
 246                  dma2,          /* Capture DMA */
 247                  0);
 248 
 249 #if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
 250   if (mpu_base != 0 && mpu_irq != 0 && mpu_detected)
 251     {
 252       static struct address_info hw_config2 =
 253       {0};                      /* Ensure it's initialized */
 254 
 255       hw_config2.io_base = mpu_base;
 256       hw_config2.irq = mpu_irq;
 257       hw_config2.dma = -1;
 258       hw_config2.dma2 = -1;
 259       hw_config2.always_detect = 0;
 260       hw_config2.name = NULL;
 261       hw_config2.driver_use_1 = 0;
 262       hw_config2.driver_use_2 = 0;
 263       hw_config2.card_subtype = 0;
 264       hw_config2.osp = hw_config->osp;
 265 
 266       unload_mpu401 (&hw_config2);
 267     }
 268 #endif
 269 }
 270 
 271 void
 272 unload_cs4232_mpu (struct address_info *hw_config)
     /*  */
 273 {
 274   /* Not required. Handled by cs4232_unload */
 275 }
 276 
 277 
 278 #endif
/* */
root/drivers/sound/cs4232.c

DEFINITIONS
