drivers/sound/cs4232.c

/* */
This source file includes following definitions.
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  * Copyright by Hannu Savolainen 1995
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions are
  15  * met: 1. Redistributions of source code must retain the above copyright
  16  * notice, this list of conditions and the following disclaimer. 2.
  17  * Redistributions in binary form must reproduce the above copyright notice,
  18  * this list of conditions and the following disclaimer in the documentation
  19  * and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
  22  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  24  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  25  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  27  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  */
  34 
  35 #include "sound_config.h"
  36 
  37 #if defined(CONFIG_CS4232)
  38 
  39 #define KEY_PORT        0x279   /* Same as LPT1 status port */
  40 #define CSN_NUM         0x99    /* Just a random number */
  41 
  42 #define CS_OUT(a)               outb( a,  KEY_PORT)
  43 #define CS_OUT2(a, b)           {CS_OUT(a);CS_OUT(b);}
  44 #define CS_OUT3(a, b, c)        {CS_OUT(a);CS_OUT(b);CS_OUT(c);}
  45 
  46 static int      mpu_base = 0, mpu_irq = 0;
  47 static int      mpu_detected = 0;
  48 
  49 int
  50 probe_cs4232_mpu (struct address_info *hw_config)
     /*  */
  51 {
  52 /*
  53  * Just write down the config values.
  54  */
  55 
  56   mpu_base = hw_config->io_base;
  57   mpu_irq = hw_config->irq;
  58   return 0;
  59 }
  60 
  61 long
  62 attach_cs4232_mpu (long mem_start, struct address_info *hw_config)
     /*  */
  63 {
  64   return mem_start;
  65 }
  66 
  67 static unsigned char crystal_key[] =    /* A 32 byte magic key sequence */
  68 {
  69   0x96, 0x35, 0x9a, 0xcd, 0xe6, 0xf3, 0x79, 0xbc,
  70   0x5e, 0xaf, 0x57, 0x2b, 0x15, 0x8a, 0xc5, 0xe2,
  71   0xf1, 0xf8, 0x7c, 0x3e, 0x9f, 0x4f, 0x27, 0x13,
  72   0x09, 0x84, 0x42, 0xa1, 0xd0, 0x68, 0x34, 0x1a
  73 };
  74 
  75 int
  76 probe_cs4232 (struct address_info *hw_config)
     /*  */
  77 {
  78   int             i;
  79   int             base = hw_config->io_base, irq = hw_config->irq;
  80   int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
  81 
  82 /*
  83  * Verify that the I/O port range is free.
  84  */
  85 
  86   if (check_region (base, 4))
  87     {
  88       printk ("cs4232.c: I/O port 0x%03x not free\n", base);
  89       return 0;
  90     }
  91 
  92   if (ad1848_detect (hw_config->io_base, NULL, hw_config->osp))
  93     return 1;                   /* The card is already active */
  94 
  95 /*
  96  * This version of the driver doesn't use the PnP method when configuring
  97  * the card but a simplified method defined by Crystal. This means that
  98  * just one CS4232 compatible device can exist on the system. Also this
  99  * method conflicts with possible PnP support in the OS. For this reason 
 100  * driver is just a temporary kludge.
 101  */
 102 
 103 /*
 104  * Wake up the card by sending a 32 byte Crystal key to the key port.
 105  */
 106   for (i = 0; i < 32; i++)
 107     CS_OUT (crystal_key[i]);
 108 
 109 /*
 110  * Now set the CSN (Card Select Number).
 111  */
 112 
 113   CS_OUT2 (0x06, CSN_NUM);
 114 
 115 
 116 /*
 117  * Then set some config bytes. First logical device 0 
 118  */
 119 
 120   CS_OUT2 (0x15, 0x00);         /* Select logical device 0 (WSS/SB/FM) */
 121   CS_OUT3 (0x47, (base >> 8) & 0xff, base & 0xff);      /* WSSbase */
 122 
 123   if (check_region (0x388, 4))  /* Not free */
 124     CS_OUT3 (0x48, 0x00, 0x00)  /* FMbase off */
 125       else
 126     CS_OUT3 (0x48, 0x03, 0x88); /* FMbase 0x388 */
 127 
 128   CS_OUT3 (0x42, 0x00, 0x00);   /* SBbase off */
 129   CS_OUT2 (0x22, irq);          /* SB+WSS IRQ */
 130   CS_OUT2 (0x2a, dma1);         /* SB+WSS DMA */
 131 
 132   if (dma2 != -1)
 133     CS_OUT2 (0x25, dma2)        /* WSS DMA2 */
 134       else
 135     CS_OUT2 (0x25, 4);          /* No WSS DMA2 */
 136 
 137   CS_OUT2 (0x33, 0x01);         /* Activate logical dev 0 */
 138 
 139 /*
 140  * Initialize logical device 3 (MPU)
 141  */
 142 
 143 #if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
 144   if (mpu_base != 0 && mpu_irq != 0)
 145     {
 146       CS_OUT2 (0x15, 0x03);     /* Select logical device 3 (MPU) */
 147       CS_OUT3 (0x47, (mpu_base >> 8) & 0xff, mpu_base & 0xff);  /* MPUbase */
 148       CS_OUT2 (0x22, mpu_irq);  /* MPU IRQ */
 149       CS_OUT2 (0x33, 0x01);     /* Activate logical dev 3 */
 150     }
 151 #endif
 152 
 153 /*
 154  * Finally activate the chip
 155  */
 156   CS_OUT (0x79);
 157 
 158 /*
 159  * Then try to detect the codec part of the chip
 160  */
 161 
 162   return ad1848_detect (hw_config->io_base, NULL, hw_config->osp);
 163 }
 164 
 165 long
 166 attach_cs4232 (long mem_start, struct address_info *hw_config)
     /*  */
 167 {
 168   int             base = hw_config->io_base, irq = hw_config->irq;
 169   int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
 170 
 171   if (dma2 == -1)
 172     dma2 = dma1;
 173 
 174   ad1848_init ("CS4232", base,
 175                irq,
 176                dma1,            /* Playback DMA */
 177                dma2,            /* Capture DMA */
 178                0,
 179                hw_config->osp);
 180 
 181 #if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
 182   if (mpu_base != 0 && mpu_irq != 0)
 183     {
 184       static struct address_info hw_config2 =
 185       {0};                      /* Ensure it's initialized */
 186 
 187       hw_config2.io_base = mpu_base;
 188       hw_config2.irq = mpu_irq;
 189       hw_config2.dma = -1;
 190       hw_config2.dma2 = -1;
 191       hw_config2.always_detect = 0;
 192       hw_config2.name = NULL;
 193       hw_config2.driver_use_1 = 0;
 194       hw_config2.driver_use_2 = 0;
 195       hw_config2.card_subtype = 0;
 196       hw_config2.osp = hw_config->osp;
 197 
 198       if (probe_mpu401 (&hw_config2))
 199         {
 200           mpu_detected = 1;
 201           mem_start = attach_mpu401 (mem_start, &hw_config2);
 202         }
 203       else
 204         {
 205           mpu_base = mpu_irq = 0;
 206         }
 207     }
 208 #endif
 209   return mem_start;
 210 }
 211 
 212 void
 213 unload_cs4232 (struct address_info *hw_config)
     /*  */
 214 {
 215   int             base = hw_config->io_base, irq = hw_config->irq;
 216   int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
 217 
 218   if (dma2 == -1)
 219     dma2 = dma1;
 220 
 221   ad1848_unload (base,
 222                  irq,
 223                  dma1,          /* Playback DMA */
 224                  dma2,          /* Capture DMA */
 225                  0);
 226 
 227 #if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
 228   if (mpu_base != 0 && mpu_irq != 0 && mpu_detected)
 229     {
 230       static struct address_info hw_config2 =
 231       {0};                      /* Ensure it's initialized */
 232 
 233       hw_config2.io_base = mpu_base;
 234       hw_config2.irq = mpu_irq;
 235       hw_config2.dma = -1;
 236       hw_config2.dma2 = -1;
 237       hw_config2.always_detect = 0;
 238       hw_config2.name = NULL;
 239       hw_config2.driver_use_1 = 0;
 240       hw_config2.driver_use_2 = 0;
 241       hw_config2.card_subtype = 0;
 242       hw_config2.osp = hw_config->osp;
 243 
 244       unload_mpu401 (&hw_config2);
 245     }
 246 #endif
 247 }
 248 
 249 void
 250 unload_cs4232_mpu (struct address_info *hw_config)
     /*  */
 251 {
 252   /* Not required. Handled by cs4232_unload */
 253 }
 254 
 255 
 256 #endif
/* */
root/drivers/sound/cs4232.c

DEFINITIONS
