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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [sound/] [cs4232.c] - Blame information for rev 1765

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1 1626 jcastillo 
/*
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 implemented. Just the WSS codec, FM synth and the MIDI ports are
9 
 * supported. Other interfaces are left uninitialized.
10 
 */
11 
/*
12 
 * Copyright (C) by Hannu Savolainen 1993-1996
13 
 *
14 
 * USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
15 
 * Version 2 (June 1991). See the "COPYING" file distributed with this software
16 
 * for more info.
17 
 */
18 
#include <linux/config.h>
19 
 
20 
 
21 
#include "sound_config.h"
22 
 
23 
#if defined(CONFIG_CS4232)
24 
 
25 
#define KEY_PORT        0x279   /* Same as LPT1 status port */
26 
#define CSN_NUM         0x99    /* Just a random number */
27 
 
28 
static int     *osp;
29 
 
30 
static void
31 
CS_OUT (unsigned char a)
32 
{
33 
  outb (a, KEY_PORT);
34 
}
35 
#define CS_OUT2(a, b)           {CS_OUT(a);CS_OUT(b);}
36 
#define CS_OUT3(a, b, c)        {CS_OUT(a);CS_OUT(b);CS_OUT(c);}
37 
 
38 
static int      mpu_base = 0, mpu_irq = 0;
39 
static int      mpu_detected = 0;
40 
 
41 
int
42 
probe_cs4232_mpu (struct address_info *hw_config)
43 
{
44 
/*
45 
 * Just write down the config values.
46 
 */
47 
 
48 
  mpu_base = hw_config->io_base;
49 
  mpu_irq = hw_config->irq;
50 
 
51 
  return 0;
52 
}
53 
 
54 
void
55 
attach_cs4232_mpu (struct address_info *hw_config)
56 
{
57 
}
58 
 
59 
static unsigned char crystal_key[] =    /* A 32 byte magic key sequence */
60 
{
61 
  0x96, 0x35, 0x9a, 0xcd, 0xe6, 0xf3, 0x79, 0xbc,
62 
  0x5e, 0xaf, 0x57, 0x2b, 0x15, 0x8a, 0xc5, 0xe2,
63 
  0xf1, 0xf8, 0x7c, 0x3e, 0x9f, 0x4f, 0x27, 0x13,
64 
  0x09, 0x84, 0x42, 0xa1, 0xd0, 0x68, 0x34, 0x1a
65 
};
66 
 
67 
int
68 
probe_cs4232 (struct address_info *hw_config)
69 
{
70 
  int             i, n;
71 
  int             base = hw_config->io_base, irq = hw_config->irq;
72 
  int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
73 
 
74 
  static wait_handle *cs_sleeper = NULL;
75 
  static volatile struct snd_wait cs_sleep_flag =
76 
  {0};
77 
 
78 
  osp = hw_config->osp;
79 
 
80 
/*
81 
 * Verify that the I/O port range is free.
82 
 */
83 
 
84 
  if (check_region (base, 4))
85 
    {
86 
      printk ("cs4232.c: I/O port 0x%03x not free\n", base);
87 
      return 0;
88 
    }
89 
 
90 
  if (ad1848_detect (hw_config->io_base, NULL, hw_config->osp))
91 
    return 1;                   /* The card is already active */
92 
 
93 
/*
94 
 * This version of the driver doesn't use the PnP method when configuring
95 
 * the card but a simplified method defined by Crystal. This means that
96 
 * just one CS4232 compatible device can exist on the system. Also this
97 
 * method conflicts with possible PnP support in the OS. For this reason
98 
 * driver is just a temporary kludge.
99 
 */
100 
 
101 
/*
102 
 * Repeat initialization few times since it doesn't always succeed in
103 
 * first time.
104 
 */
105 
 
106 
  for (n = 0; n < 4; n++)
107 
    {
108 
      cs_sleep_flag.flags = WK_NONE;
109 
/*
110 
 * Wake up the card by sending a 32 byte Crystal key to the key port.
111 
 */
112 
      for (i = 0; i < 32; i++)
113 
        CS_OUT (crystal_key[i]);
114 
 
115 
 
116 
      {
117 
        unsigned long   tlimit;
118 
 
119 
        if (HZ / 10)
120 
          current_set_timeout (tlimit = jiffies + (HZ / 10));
121 
        else
122 
          tlimit = (unsigned long) -1;
123 
        cs_sleep_flag.flags = WK_SLEEP;
124 
        module_interruptible_sleep_on (&cs_sleeper);
125 
        if (!(cs_sleep_flag.flags & WK_WAKEUP))
126 
          {
127 
            if (jiffies >= tlimit)
128 
              cs_sleep_flag.flags |= WK_TIMEOUT;
129 
          }
130 
        cs_sleep_flag.flags &= ~WK_SLEEP;
131 
      };                        /* Delay */
132 
 
133 
/*
134 
 * Now set the CSN (Card Select Number).
135 
 */
136 
 
137 
      CS_OUT2 (0x06, CSN_NUM);
138 
 
139 
 
140 
/*
141 
 * Then set some config bytes. First logical device 0
142 
 */
143 
 
144 
      CS_OUT2 (0x15, 0x00);     /* Select logical device 0 (WSS/SB/FM) */
145 
      CS_OUT3 (0x47, (base >> 8) & 0xff, base & 0xff);  /* WSS base */
146 
 
147 
      if (check_region (0x388, 4))      /* Not free */
148 
        CS_OUT3 (0x48, 0x00, 0x00)      /* FM base off */
149 
          else
150 
        CS_OUT3 (0x48, 0x03, 0x88);     /* FM base 0x388 */
151 
 
152 
      CS_OUT3 (0x42, 0x00, 0x00);       /* SB base off */
153 
      CS_OUT2 (0x22, irq);      /* SB+WSS IRQ */
154 
      CS_OUT2 (0x2a, dma1);     /* SB+WSS DMA */
155 
 
156 
      if (dma2 != -1)
157 
        CS_OUT2 (0x25, dma2)    /* WSS DMA2 */
158 
          else
159 
        CS_OUT2 (0x25, 4);      /* No WSS DMA2 */
160 
 
161 
      CS_OUT2 (0x33, 0x01);     /* Activate logical dev 0 */
162 
 
163 
 
164 
      {
165 
        unsigned long   tlimit;
166 
 
167 
        if (HZ / 10)
168 
          current_set_timeout (tlimit = jiffies + (HZ / 10));
169 
        else
170 
          tlimit = (unsigned long) -1;
171 
        cs_sleep_flag.flags = WK_SLEEP;
172 
        module_interruptible_sleep_on (&cs_sleeper);
173 
        if (!(cs_sleep_flag.flags & WK_WAKEUP))
174 
          {
175 
            if (jiffies >= tlimit)
176 
              cs_sleep_flag.flags |= WK_TIMEOUT;
177 
          }
178 
        cs_sleep_flag.flags &= ~WK_SLEEP;
179 
      };                        /* Delay */
180 
 
181 
/*
182 
 * Initialize logical device 3 (MPU)
183 
 */
184 
 
185 
#if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
186 
      if (mpu_base != 0 && mpu_irq != 0)
187 
        {
188 
          CS_OUT2 (0x15, 0x03); /* Select logical device 3 (MPU) */
189 
          CS_OUT3 (0x47, (mpu_base >> 8) & 0xff, mpu_base & 0xff);      /* MPU base */
190 
          CS_OUT2 (0x22, mpu_irq);      /* MPU IRQ */
191 
          CS_OUT2 (0x33, 0x01); /* Activate logical dev 3 */
192 
        }
193 
#endif
194 
 
195 
/*
196 
 * Finally activate the chip
197 
 */
198 
      CS_OUT (0x79);
199 
 
200 
 
201 
      {
202 
        unsigned long   tlimit;
203 
 
204 
        if (HZ / 5)
205 
          current_set_timeout (tlimit = jiffies + (HZ / 5));
206 
        else
207 
          tlimit = (unsigned long) -1;
208 
        cs_sleep_flag.flags = WK_SLEEP;
209 
        module_interruptible_sleep_on (&cs_sleeper);
210 
        if (!(cs_sleep_flag.flags & WK_WAKEUP))
211 
          {
212 
            if (jiffies >= tlimit)
213 
              cs_sleep_flag.flags |= WK_TIMEOUT;
214 
          }
215 
        cs_sleep_flag.flags &= ~WK_SLEEP;
216 
      };                        /* Delay */
217 
 
218 
/*
219 
 * Then try to detect the codec part of the chip
220 
 */
221 
 
222 
      if (ad1848_detect (hw_config->io_base, NULL, hw_config->osp))
223 
        return 1;
224 
 
225 
 
226 
      {
227 
        unsigned long   tlimit;
228 
 
229 
        if (HZ)
230 
          current_set_timeout (tlimit = jiffies + (HZ));
231 
        else
232 
          tlimit = (unsigned long) -1;
233 
        cs_sleep_flag.flags = WK_SLEEP;
234 
        module_interruptible_sleep_on (&cs_sleeper);
235 
        if (!(cs_sleep_flag.flags & WK_WAKEUP))
236 
          {
237 
            if (jiffies >= tlimit)
238 
              cs_sleep_flag.flags |= WK_TIMEOUT;
239 
          }
240 
        cs_sleep_flag.flags &= ~WK_SLEEP;
241 
      };                        /* Longer delay */
242 
    }
243 
 
244 
  return 0;
245 
}
246 
 
247 
void
248 
attach_cs4232 (struct address_info *hw_config)
249 
{
250 
  int             base = hw_config->io_base, irq = hw_config->irq;
251 
  int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
252 
 
253 
  if (dma2 == -1)
254 
    dma2 = dma1;
255 
 
256 
  ad1848_init ("CS4232", base,
257 
               irq,
258 
               dma1,            /* Playback DMA */
259 
               dma2,            /* Capture DMA */
260 
               0,
261 
               hw_config->osp);
262 
 
263 
#if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
264 
  if (mpu_base != 0 && mpu_irq != 0)
265 
    {
266 
      static struct address_info hw_config2 =
267 
      {0};                       /* Ensure it's initialized */
268 
 
269 
      hw_config2.io_base = mpu_base;
270 
      hw_config2.irq = mpu_irq;
271 
      hw_config2.dma = -1;
272 
      hw_config2.dma2 = -1;
273 
      hw_config2.always_detect = 0;
274 
      hw_config2.name = NULL;
275 
      hw_config2.driver_use_1 = 0;
276 
      hw_config2.driver_use_2 = 0;
277 
      hw_config2.card_subtype = 0;
278 
      hw_config2.osp = hw_config->osp;
279 
 
280 
      if (probe_mpu401 (&hw_config2))
281 
        {
282 
          mpu_detected = 1;
283 
          attach_mpu401 (&hw_config2);
284 
        }
285 
      else
286 
        {
287 
          mpu_base = mpu_irq = 0;
288 
        }
289 
    }
290 
#endif
291 
}
292 
 
293 
void
294 
unload_cs4232 (struct address_info *hw_config)
295 
{
296 
  int             base = hw_config->io_base, irq = hw_config->irq;
297 
  int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
298 
 
299 
  if (dma2 == -1)
300 
    dma2 = dma1;
301 
 
302 
  ad1848_unload (base,
303 
                 irq,
304 
                 dma1,          /* Playback DMA */
305 
                 dma2,          /* Capture DMA */
306 
                 0);
307 
 
308 
#if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_MIDI)
309 
  if (mpu_base != 0 && mpu_irq != 0 && mpu_detected)
310 
    {
311 
      static struct address_info hw_config2 =
312 
      {0};                       /* Ensure it's initialized */
313 
 
314 
      hw_config2.io_base = mpu_base;
315 
      hw_config2.irq = mpu_irq;
316 
      hw_config2.dma = -1;
317 
      hw_config2.dma2 = -1;
318 
      hw_config2.always_detect = 0;
319 
      hw_config2.name = NULL;
320 
      hw_config2.driver_use_1 = 0;
321 
      hw_config2.driver_use_2 = 0;
322 
      hw_config2.card_subtype = 0;
323 
      hw_config2.osp = hw_config->osp;
324 
 
325 
      unload_mpu401 (&hw_config2);
326 
    }
327 
#endif
328 
}
329 
 
330 
void
331 
unload_cs4232_mpu (struct address_info *hw_config)
332 
{
333 
  /* Not required. Handled by cs4232_unload */
334 
}
335 
 
336 
 
337 
#endif

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