2 /* This is a modified version of linux/drivers/sound/dmasound.c to
3 * support the CS4218 codec on the 8xx TDM port. Thanks to everyone
4 * that contributed to the dmasound software (which includes me :-).
6 * The CS4218 is configured in Mode 4, sub-mode 0. This provides
7 * left/right data only on the TDM port, as a 32-bit word, per frame
8 * pulse. The control of the CS4218 is provided by some other means,
10 * Dan Malek (dmalek@jlc.net)
13 #include <linux/module.h>
14 #include <linux/sched.h>
15 #include <linux/timer.h>
16 #include <linux/major.h>
17 #include <linux/fcntl.h>
18 #include <linux/errno.h>
20 #include <linux/slab.h>
21 #include <linux/sound.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
25 #include <asm/system.h>
27 #include <asm/pgtable.h>
28 #include <asm/uaccess.h>
31 /* Should probably do something different with this path name.....
32 * Actually, I should just stop using it...
35 #include <linux/soundcard.h>
37 #include <asm/mpc8xx.h>
38 #include <asm/8xx_immap.h>
39 #include <asm/commproc.h>
41 #define DMASND_CS4218 5
43 #define MAX_CATCH_RADIUS 10
46 #define MAX_BUFSIZE 128
48 #define HAS_8BIT_TABLES
50 static int sq_unit = -1;
51 static int mixer_unit = -1;
52 static int state_unit = -1;
53 static int irq_installed = 0;
54 static char **sound_buffers = NULL;
55 static char **sound_read_buffers = NULL;
57 static DEFINE_SPINLOCK(cs4218_lock);
59 /* Local copies of things we put in the control register. Output
60 * volume, like most codecs is really attenuation.
62 static int cs4218_rate_index;
65 * Stuff for outputting a beep. The values range from -327 to +327
66 * so we can multiply by an amplitude in the range 0..100 to get a
67 * signed short value to put in the output buffer.
69 static short beep_wform[256] = {
70 0, 40, 79, 117, 153, 187, 218, 245,
71 269, 288, 304, 316, 323, 327, 327, 324,
72 318, 310, 299, 288, 275, 262, 249, 236,
73 224, 213, 204, 196, 190, 186, 183, 182,
74 182, 183, 186, 189, 192, 196, 200, 203,
75 206, 208, 209, 209, 209, 207, 204, 201,
76 197, 193, 188, 183, 179, 174, 170, 166,
77 163, 161, 160, 159, 159, 160, 161, 162,
78 164, 166, 168, 169, 171, 171, 171, 170,
79 169, 167, 163, 159, 155, 150, 144, 139,
80 133, 128, 122, 117, 113, 110, 107, 105,
81 103, 103, 103, 103, 104, 104, 105, 105,
82 105, 103, 101, 97, 92, 86, 78, 68,
83 58, 45, 32, 18, 3, -11, -26, -41,
84 -55, -68, -79, -88, -95, -100, -102, -102,
85 -99, -93, -85, -75, -62, -48, -33, -16,
86 0, 16, 33, 48, 62, 75, 85, 93,
87 99, 102, 102, 100, 95, 88, 79, 68,
88 55, 41, 26, 11, -3, -18, -32, -45,
89 -58, -68, -78, -86, -92, -97, -101, -103,
90 -105, -105, -105, -104, -104, -103, -103, -103,
91 -103, -105, -107, -110, -113, -117, -122, -128,
92 -133, -139, -144, -150, -155, -159, -163, -167,
93 -169, -170, -171, -171, -171, -169, -168, -166,
94 -164, -162, -161, -160, -159, -159, -160, -161,
95 -163, -166, -170, -174, -179, -183, -188, -193,
96 -197, -201, -204, -207, -209, -209, -209, -208,
97 -206, -203, -200, -196, -192, -189, -186, -183,
98 -182, -182, -183, -186, -190, -196, -204, -213,
99 -224, -236, -249, -262, -275, -288, -299, -310,
100 -318, -324, -327, -327, -323, -316, -304, -288,
101 -269, -245, -218, -187, -153, -117, -79, -40,
104 #define BEEP_SPEED 5 /* 22050 Hz sample rate */
105 #define BEEP_BUFLEN 512
106 #define BEEP_VOLUME 15 /* 0 - 100 */
108 static int beep_volume = BEEP_VOLUME;
109 static int beep_playing = 0;
110 static int beep_state = 0;
111 static short *beep_buf;
112 static void (*orig_mksound)(unsigned int, unsigned int);
114 /* This is found someplace else......I guess in the keyboard driver
117 static void (*kd_mksound)(unsigned int, unsigned int);
119 static int catchRadius = 0;
120 static int numBufs = 4, bufSize = 32;
121 static int numReadBufs = 4, readbufSize = 32;
124 /* TDM/Serial transmit and receive buffer descriptors.
126 static volatile cbd_t *rx_base, *rx_cur, *tx_base, *tx_cur;
128 module_param(catchRadius, int, 0);
129 module_param(numBufs, int, 0);
130 module_param(bufSize, int, 0);
131 module_param(numreadBufs, int, 0);
132 module_param(readbufSize, int, 0);
134 #define arraysize(x) (sizeof(x)/sizeof(*(x)))
135 #define le2be16(x) (((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff))
136 #define le2be16dbl(x) (((x)<<8 & 0xff00ff00) | ((x)>>8 & 0x00ff00ff))
138 #define IOCTL_IN(arg, ret) \
139 do { int error = get_user(ret, (int *)(arg)); \
140 if (error) return error; \
142 #define IOCTL_OUT(arg, ret) ioctl_return((int *)(arg), ret)
144 /* CS4218 serial port control in mode 4.
146 #define CS_INTMASK ((uint)0x40000000)
147 #define CS_DO1 ((uint)0x20000000)
148 #define CS_LATTEN ((uint)0x1f000000)
149 #define CS_RATTEN ((uint)0x00f80000)
150 #define CS_MUTE ((uint)0x00040000)
151 #define CS_ISL ((uint)0x00020000)
152 #define CS_ISR ((uint)0x00010000)
153 #define CS_LGAIN ((uint)0x0000f000)
154 #define CS_RGAIN ((uint)0x00000f00)
156 #define CS_LATTEN_SET(X) (((X) & 0x1f) << 24)
157 #define CS_RATTEN_SET(X) (((X) & 0x1f) << 19)
158 #define CS_LGAIN_SET(X) (((X) & 0x0f) << 12)
159 #define CS_RGAIN_SET(X) (((X) & 0x0f) << 8)
161 #define CS_LATTEN_GET(X) (((X) >> 24) & 0x1f)
162 #define CS_RATTEN_GET(X) (((X) >> 19) & 0x1f)
163 #define CS_LGAIN_GET(X) (((X) >> 12) & 0x0f)
164 #define CS_RGAIN_GET(X) (((X) >> 8) & 0x0f)
166 /* The control register is effectively write only. We have to keep a copy
169 static uint cs4218_control;
171 /* A place to store expanding information.
173 static int expand_bal;
174 static int expand_data;
176 /* Since I can't make the microcode patch work for the SPI, I just
177 * clock the bits using software.
179 static void sw_spi_init(void);
180 static void sw_spi_io(u_char *obuf, u_char *ibuf, uint bcnt);
181 static uint cs4218_ctl_write(uint ctlreg);
183 /*** Some low level helpers **************************************************/
187 static short ulaw2dma16[] = {
188 -32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
189 -23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
190 -15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
191 -11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
192 -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
193 -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
194 -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
195 -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
196 -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
197 -1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
198 -876, -844, -812, -780, -748, -716, -684, -652,
199 -620, -588, -556, -524, -492, -460, -428, -396,
200 -372, -356, -340, -324, -308, -292, -276, -260,
201 -244, -228, -212, -196, -180, -164, -148, -132,
202 -120, -112, -104, -96, -88, -80, -72, -64,
203 -56, -48, -40, -32, -24, -16, -8, 0,
204 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
205 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
206 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
207 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
208 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
209 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
210 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
211 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
212 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
213 1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
214 876, 844, 812, 780, 748, 716, 684, 652,
215 620, 588, 556, 524, 492, 460, 428, 396,
216 372, 356, 340, 324, 308, 292, 276, 260,
217 244, 228, 212, 196, 180, 164, 148, 132,
218 120, 112, 104, 96, 88, 80, 72, 64,
219 56, 48, 40, 32, 24, 16, 8, 0,
224 static short alaw2dma16[] = {
225 -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
226 -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
227 -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
228 -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
229 -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
230 -30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
231 -11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
232 -15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
233 -344, -328, -376, -360, -280, -264, -312, -296,
234 -472, -456, -504, -488, -408, -392, -440, -424,
235 -88, -72, -120, -104, -24, -8, -56, -40,
236 -216, -200, -248, -232, -152, -136, -184, -168,
237 -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
238 -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
239 -688, -656, -752, -720, -560, -528, -624, -592,
240 -944, -912, -1008, -976, -816, -784, -880, -848,
241 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
242 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
243 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
244 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
245 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
246 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
247 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
248 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
249 344, 328, 376, 360, 280, 264, 312, 296,
250 472, 456, 504, 488, 408, 392, 440, 424,
251 88, 72, 120, 104, 24, 8, 56, 40,
252 216, 200, 248, 232, 152, 136, 184, 168,
253 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
254 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
255 688, 656, 752, 720, 560, 528, 624, 592,
256 944, 912, 1008, 976, 816, 784, 880, 848,
260 /*** Translations ************************************************************/
263 static ssize_t cs4218_ct_law(const u_char *userPtr, size_t userCount,
264 u_char frame[], ssize_t *frameUsed,
266 static ssize_t cs4218_ct_s8(const u_char *userPtr, size_t userCount,
267 u_char frame[], ssize_t *frameUsed,
269 static ssize_t cs4218_ct_u8(const u_char *userPtr, size_t userCount,
270 u_char frame[], ssize_t *frameUsed,
272 static ssize_t cs4218_ct_s16(const u_char *userPtr, size_t userCount,
273 u_char frame[], ssize_t *frameUsed,
275 static ssize_t cs4218_ct_u16(const u_char *userPtr, size_t userCount,
276 u_char frame[], ssize_t *frameUsed,
278 static ssize_t cs4218_ctx_law(const u_char *userPtr, size_t userCount,
279 u_char frame[], ssize_t *frameUsed,
281 static ssize_t cs4218_ctx_s8(const u_char *userPtr, size_t userCount,
282 u_char frame[], ssize_t *frameUsed,
284 static ssize_t cs4218_ctx_u8(const u_char *userPtr, size_t userCount,
285 u_char frame[], ssize_t *frameUsed,
287 static ssize_t cs4218_ctx_s16(const u_char *userPtr, size_t userCount,
288 u_char frame[], ssize_t *frameUsed,
290 static ssize_t cs4218_ctx_u16(const u_char *userPtr, size_t userCount,
291 u_char frame[], ssize_t *frameUsed,
293 static ssize_t cs4218_ct_s16_read(const u_char *userPtr, size_t userCount,
294 u_char frame[], ssize_t *frameUsed,
296 static ssize_t cs4218_ct_u16_read(const u_char *userPtr, size_t userCount,
297 u_char frame[], ssize_t *frameUsed,
301 /*** Low level stuff *********************************************************/
303 struct cs_sound_settings {
304 MACHINE mach; /* machine dependent things */
305 SETTINGS hard; /* hardware settings */
306 SETTINGS soft; /* software settings */
307 SETTINGS dsp; /* /dev/dsp default settings */
308 TRANS *trans_write; /* supported translations for playback */
309 TRANS *trans_read; /* supported translations for record */
310 int volume_left; /* volume (range is machine dependent) */
312 int bass; /* tone (range is machine dependent) */
315 int minDev; /* minor device number currently open */
318 static struct cs_sound_settings sound;
320 static void *CS_Alloc(unsigned int size, gfp_t flags);
321 static void CS_Free(void *ptr, unsigned int size);
322 static int CS_IrqInit(void);
324 static void CS_IrqCleanup(void);
326 static void CS_Silence(void);
327 static void CS_Init(void);
328 static void CS_Play(void);
329 static void CS_Record(void);
330 static int CS_SetFormat(int format);
331 static int CS_SetVolume(int volume);
332 static void cs4218_tdm_tx_intr(void *devid);
333 static void cs4218_tdm_rx_intr(void *devid);
334 static void cs4218_intr(void *devid);
335 static int cs_get_volume(uint reg);
336 static int cs_volume_setter(int volume, int mute);
337 static int cs_get_gain(uint reg);
338 static int cs_set_gain(int gain);
339 static void cs_mksound(unsigned int hz, unsigned int ticks);
340 static void cs_nosound(unsigned long xx);
342 /*** Mid level stuff *********************************************************/
345 static void sound_silence(void);
346 static void sound_init(void);
347 static int sound_set_format(int format);
348 static int sound_set_speed(int speed);
349 static int sound_set_stereo(int stereo);
350 static int sound_set_volume(int volume);
352 static ssize_t sound_copy_translate(const u_char *userPtr,
354 u_char frame[], ssize_t *frameUsed,
356 static ssize_t sound_copy_translate_read(const u_char *userPtr,
358 u_char frame[], ssize_t *frameUsed,
363 * /dev/mixer abstraction
371 static struct sound_mixer mixer;
373 static struct sound_queue sq;
374 static struct sound_queue read_sq;
376 #define sq_block_address(i) (sq.buffers[i])
377 #define SIGNAL_RECEIVED (signal_pending(current))
378 #define NON_BLOCKING(open_mode) (open_mode & O_NONBLOCK)
379 #define ONE_SECOND HZ /* in jiffies (100ths of a second) */
380 #define NO_TIME_LIMIT 0xffffffff
392 static struct sound_state state;
394 /*** Common stuff ********************************************************/
396 static long long sound_lseek(struct file *file, long long offset, int orig);
398 /*** Config & Setup **********************************************************/
400 void dmasound_setup(char *str, int *ints);
402 /*** Translations ************************************************************/
405 /* ++TeSche: radically changed for new expanding purposes...
407 * These two routines now deal with copying/expanding/translating the samples
408 * from user space into our buffer at the right frequency. They take care about
409 * how much data there's actually to read, how much buffer space there is and
410 * to convert samples into the right frequency/encoding. They will only work on
411 * complete samples so it may happen they leave some bytes in the input stream
412 * if the user didn't write a multiple of the current sample size. They both
413 * return the number of bytes they've used from both streams so you may detect
414 * such a situation. Luckily all programs should be able to cope with that.
416 * I think I've optimized anything as far as one can do in plain C, all
417 * variables should fit in registers and the loops are really short. There's
418 * one loop for every possible situation. Writing a more generalized and thus
419 * parameterized loop would only produce slower code. Feel free to optimize
420 * this in assembler if you like. :)
422 * I think these routines belong here because they're not yet really hardware
423 * independent, especially the fact that the Falcon can play 16bit samples
424 * only in stereo is hardcoded in both of them!
426 * ++geert: split in even more functions (one per format)
429 static ssize_t cs4218_ct_law(const u_char *userPtr, size_t userCount,
430 u_char frame[], ssize_t *frameUsed,
433 short *table = sound.soft.format == AFMT_MU_LAW ? ulaw2dma16: alaw2dma16;
435 short *p = (short *) &frame[*frameUsed];
436 int val, stereo = sound.soft.stereo;
441 used = count = min(userCount, frameLeft);
444 if (get_user(data, userPtr++))
449 if (get_user(data, userPtr++))
456 *frameUsed += used * 4;
457 return stereo? used * 2: used;
461 static ssize_t cs4218_ct_s8(const u_char *userPtr, size_t userCount,
462 u_char frame[], ssize_t *frameUsed,
466 short *p = (short *) &frame[*frameUsed];
467 int val, stereo = sound.soft.stereo;
472 used = count = min(userCount, frameLeft);
475 if (get_user(data, userPtr++))
480 if (get_user(data, userPtr++))
487 *frameUsed += used * 4;
488 return stereo? used * 2: used;
492 static ssize_t cs4218_ct_u8(const u_char *userPtr, size_t userCount,
493 u_char frame[], ssize_t *frameUsed,
497 short *p = (short *) &frame[*frameUsed];
498 int val, stereo = sound.soft.stereo;
503 used = count = min(userCount, frameLeft);
506 if (get_user(data, userPtr++))
508 val = (data ^ 0x80) << 8;
511 if (get_user(data, userPtr++))
513 val = (data ^ 0x80) << 8;
518 *frameUsed += used * 4;
519 return stereo? used * 2: used;
523 /* This is the default format of the codec. Signed, 16-bit stereo
524 * generated by an application shouldn't have to be copied at all.
525 * We should just get the phsical address of the buffers and update
526 * the TDM BDs directly.
528 static ssize_t cs4218_ct_s16(const u_char *userPtr, size_t userCount,
529 u_char frame[], ssize_t *frameUsed,
533 int stereo = sound.soft.stereo;
534 short *fp = (short *) &frame[*frameUsed];
537 userCount >>= (stereo? 2: 1);
538 used = count = min(userCount, frameLeft);
540 short *up = (short *) userPtr;
543 if (get_user(data, up++))
550 if (copy_from_user(fp, userPtr, count * 4))
553 *frameUsed += used * 4;
554 return stereo? used * 4: used * 2;
557 static ssize_t cs4218_ct_u16(const u_char *userPtr, size_t userCount,
558 u_char frame[], ssize_t *frameUsed,
562 int mask = (sound.soft.format == AFMT_U16_LE? 0x0080: 0x8000);
563 int stereo = sound.soft.stereo;
564 short *fp = (short *) &frame[*frameUsed];
565 short *up = (short *) userPtr;
568 userCount >>= (stereo? 2: 1);
569 used = count = min(userCount, frameLeft);
572 if (get_user(data, up++))
577 if (get_user(data, up++))
584 *frameUsed += used * 4;
585 return stereo? used * 4: used * 2;
589 static ssize_t cs4218_ctx_law(const u_char *userPtr, size_t userCount,
590 u_char frame[], ssize_t *frameUsed,
593 unsigned short *table = (unsigned short *)
594 (sound.soft.format == AFMT_MU_LAW ? ulaw2dma16: alaw2dma16);
595 unsigned int data = expand_data;
596 unsigned int *p = (unsigned int *) &frame[*frameUsed];
597 int bal = expand_bal;
598 int hSpeed = sound.hard.speed, sSpeed = sound.soft.speed;
600 int stereo = sound.soft.stereo;
612 if (get_user(c, userPtr++))
616 if (get_user(c, userPtr++))
618 data = (data << 16) + table[c];
620 data = (data << 16) + data;
630 *frameUsed += (ftotal - frameLeft) * 4;
632 return stereo? utotal * 2: utotal;
636 static ssize_t cs4218_ctx_s8(const u_char *userPtr, size_t userCount,
637 u_char frame[], ssize_t *frameUsed,
640 unsigned int *p = (unsigned int *) &frame[*frameUsed];
641 unsigned int data = expand_data;
642 int bal = expand_bal;
643 int hSpeed = sound.hard.speed, sSpeed = sound.soft.speed;
644 int stereo = sound.soft.stereo;
657 if (get_user(c, userPtr++))
661 if (get_user(c, userPtr++))
663 data = (data << 16) + (c << 8);
665 data = (data << 16) + data;
675 *frameUsed += (ftotal - frameLeft) * 4;
677 return stereo? utotal * 2: utotal;
681 static ssize_t cs4218_ctx_u8(const u_char *userPtr, size_t userCount,
682 u_char frame[], ssize_t *frameUsed,
685 unsigned int *p = (unsigned int *) &frame[*frameUsed];
686 unsigned int data = expand_data;
687 int bal = expand_bal;
688 int hSpeed = sound.hard.speed, sSpeed = sound.soft.speed;
689 int stereo = sound.soft.stereo;
702 if (get_user(c, userPtr++))
704 data = (c ^ 0x80) << 8;
706 if (get_user(c, userPtr++))
708 data = (data << 16) + ((c ^ 0x80) << 8);
710 data = (data << 16) + data;
720 *frameUsed += (ftotal - frameLeft) * 4;
722 return stereo? utotal * 2: utotal;
726 static ssize_t cs4218_ctx_s16(const u_char *userPtr, size_t userCount,
727 u_char frame[], ssize_t *frameUsed,
730 unsigned int *p = (unsigned int *) &frame[*frameUsed];
731 unsigned int data = expand_data;
732 unsigned short *up = (unsigned short *) userPtr;
733 int bal = expand_bal;
734 int hSpeed = sound.hard.speed, sSpeed = sound.soft.speed;
735 int stereo = sound.soft.stereo;
739 userCount >>= (stereo? 2: 1);
747 if (get_user(data, up++))
750 if (get_user(c, up++))
752 data = (data << 16) + c;
754 data = (data << 16) + data;
764 *frameUsed += (ftotal - frameLeft) * 4;
766 return stereo? utotal * 4: utotal * 2;
770 static ssize_t cs4218_ctx_u16(const u_char *userPtr, size_t userCount,
771 u_char frame[], ssize_t *frameUsed,
774 int mask = (sound.soft.format == AFMT_U16_LE? 0x0080: 0x8000);
775 unsigned int *p = (unsigned int *) &frame[*frameUsed];
776 unsigned int data = expand_data;
777 unsigned short *up = (unsigned short *) userPtr;
778 int bal = expand_bal;
779 int hSpeed = sound.hard.speed, sSpeed = sound.soft.speed;
780 int stereo = sound.soft.stereo;
784 userCount >>= (stereo? 2: 1);
792 if (get_user(data, up++))
796 if (get_user(c, up++))
798 data = (data << 16) + (c ^ mask);
800 data = (data << 16) + data;
810 *frameUsed += (ftotal - frameLeft) * 4;
812 return stereo? utotal * 4: utotal * 2;
815 static ssize_t cs4218_ct_s8_read(const u_char *userPtr, size_t userCount,
816 u_char frame[], ssize_t *frameUsed,
820 short *p = (short *) &frame[*frameUsed];
821 int val, stereo = sound.soft.stereo;
826 used = count = min(userCount, frameLeft);
832 if (put_user(data, (u_char *)userPtr++))
837 if (put_user(data, (u_char *)userPtr++))
843 *frameUsed += used * 4;
844 return stereo? used * 2: used;
848 static ssize_t cs4218_ct_u8_read(const u_char *userPtr, size_t userCount,
849 u_char frame[], ssize_t *frameUsed,
853 short *p = (short *) &frame[*frameUsed];
854 int val, stereo = sound.soft.stereo;
859 used = count = min(userCount, frameLeft);
864 data = (val >> 8) ^ 0x80;
865 if (put_user(data, (u_char *)userPtr++))
869 data = (val >> 8) ^ 0x80;
870 if (put_user(data, (u_char *)userPtr++))
876 *frameUsed += used * 4;
877 return stereo? used * 2: used;
881 static ssize_t cs4218_ct_s16_read(const u_char *userPtr, size_t userCount,
882 u_char frame[], ssize_t *frameUsed,
886 int stereo = sound.soft.stereo;
887 short *fp = (short *) &frame[*frameUsed];
890 userCount >>= (stereo? 2: 1);
891 used = count = min(userCount, frameLeft);
893 short *up = (short *) userPtr;
897 if (put_user(data, up++))
903 if (copy_to_user((u_char *)userPtr, fp, count * 4))
906 *frameUsed += used * 4;
907 return stereo? used * 4: used * 2;
910 static ssize_t cs4218_ct_u16_read(const u_char *userPtr, size_t userCount,
911 u_char frame[], ssize_t *frameUsed,
915 int mask = (sound.soft.format == AFMT_U16_LE? 0x0080: 0x8000);
916 int stereo = sound.soft.stereo;
917 short *fp = (short *) &frame[*frameUsed];
918 short *up = (short *) userPtr;
921 userCount >>= (stereo? 2: 1);
922 used = count = min(userCount, frameLeft);
928 if (put_user(data, up++))
933 if (put_user(data, up++))
939 *frameUsed += used * 4;
940 return stereo? used * 4: used * 2;
943 static TRANS transCSNormal = {
944 cs4218_ct_law, cs4218_ct_law, cs4218_ct_s8, cs4218_ct_u8,
945 cs4218_ct_s16, cs4218_ct_u16, cs4218_ct_s16, cs4218_ct_u16
948 static TRANS transCSExpand = {
949 cs4218_ctx_law, cs4218_ctx_law, cs4218_ctx_s8, cs4218_ctx_u8,
950 cs4218_ctx_s16, cs4218_ctx_u16, cs4218_ctx_s16, cs4218_ctx_u16
953 static TRANS transCSNormalRead = {
954 NULL, NULL, cs4218_ct_s8_read, cs4218_ct_u8_read,
955 cs4218_ct_s16_read, cs4218_ct_u16_read,
956 cs4218_ct_s16_read, cs4218_ct_u16_read
959 /*** Low level stuff *********************************************************/
961 static void *CS_Alloc(unsigned int size, gfp_t flags)
966 for (order=0; order < 5; order++) {
971 return (void *)__get_free_pages(flags, order);
974 static void CS_Free(void *ptr, unsigned int size)
979 for (order=0; order < 5; order++) {
984 free_pages((ulong)ptr, order);
987 static int __init CS_IrqInit(void)
989 cpm_install_handler(CPMVEC_SMC2, cs4218_intr, NULL);
994 static void CS_IrqCleanup(void)
997 volatile cpm8xx_t *cp;
999 /* First disable transmitter and receiver.
1001 sp = &cpmp->cp_smc[1];
1002 sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
1004 /* And now shut down the SMC.
1006 cp = cpmp; /* Get pointer to Communication Processor */
1007 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC2,
1008 CPM_CR_STOP_TX) | CPM_CR_FLG;
1009 while (cp->cp_cpcr & CPM_CR_FLG);
1011 /* Release the interrupt handler.
1013 cpm_free_handler(CPMVEC_SMC2);
1016 kd_mksound = orig_mksound;
1020 static void CS_Silence(void)
1024 /* Disable transmitter.
1026 sp = &cpmp->cp_smc[1];
1027 sp->smc_smcmr &= ~SMCMR_TEN;
1030 /* Frequencies depend upon external oscillator. There are two
1031 * choices, 12.288 and 11.2896 MHz. The RPCG audio supports both through
1032 * and external control register selection bit.
1034 static int cs4218_freqs[] = {
1035 /* 12.288 11.2896 */
1046 static void CS_Init(void)
1050 switch (sound.soft.format) {
1053 sound.hard.format = AFMT_S16_LE;
1056 sound.hard.format = AFMT_S16_BE;
1059 sound.hard.stereo = 1;
1060 sound.hard.size = 16;
1063 * If we have a sample rate which is within catchRadius percent
1064 * of the requested value, we don't have to expand the samples.
1065 * Otherwise choose the next higher rate.
1067 i = (sizeof(cs4218_freqs) / sizeof(int));
1069 tolerance = catchRadius * cs4218_freqs[--i] / 100;
1070 } while (sound.soft.speed > cs4218_freqs[i] + tolerance && i > 0);
1071 if (sound.soft.speed >= cs4218_freqs[i] - tolerance)
1072 sound.trans_write = &transCSNormal;
1074 sound.trans_write = &transCSExpand;
1075 sound.trans_read = &transCSNormalRead;
1076 sound.hard.speed = cs4218_freqs[i];
1077 cs4218_rate_index = i;
1079 /* The CS4218 has seven selectable clock dividers for the sample
1080 * clock. The HIOX then provides one of two external rates.
1081 * An even numbered frequency table index uses the high external
1084 *(uint *)HIOX_CSR4_ADDR &= ~(HIOX_CSR4_AUDCLKHI | HIOX_CSR4_AUDCLKSEL);
1086 *(uint *)HIOX_CSR4_ADDR |= HIOX_CSR4_AUDCLKHI;
1088 *(uint *)HIOX_CSR4_ADDR |= (i & HIOX_CSR4_AUDCLKSEL);
1090 expand_bal = -sound.soft.speed;
1093 static int CS_SetFormat(int format)
1099 return sound.soft.format;
1113 printk(KERN_ERR "dmasound: unknown format 0x%x, using AFMT_U8\n",
1119 sound.soft.format = format;
1120 sound.soft.size = size;
1121 if (sound.minDev == SND_DEV_DSP) {
1122 sound.dsp.format = format;
1123 sound.dsp.size = size;
1131 /* Volume is the amount of attenuation we tell the codec to impose
1132 * on the outputs. There are 32 levels, with 0 the "loudest".
1134 #define CS_VOLUME_TO_MASK(x) (31 - ((((x) - 1) * 31) / 99))
1135 #define CS_MASK_TO_VOLUME(y) (100 - ((y) * 99 / 31))
1137 static int cs_get_volume(uint reg)
1141 volume = CS_MASK_TO_VOLUME(CS_LATTEN_GET(reg));
1142 volume |= CS_MASK_TO_VOLUME(CS_RATTEN_GET(reg)) << 8;
1146 static int cs_volume_setter(int volume, int mute)
1150 if (mute && volume == 0) {
1151 tempctl = cs4218_control | CS_MUTE;
1153 tempctl = cs4218_control & ~CS_MUTE;
1154 tempctl = tempctl & ~(CS_LATTEN | CS_RATTEN);
1155 tempctl |= CS_LATTEN_SET(CS_VOLUME_TO_MASK(volume & 0xff));
1156 tempctl |= CS_RATTEN_SET(CS_VOLUME_TO_MASK((volume >> 8) & 0xff));
1157 volume = cs_get_volume(tempctl);
1159 if (tempctl != cs4218_control) {
1160 cs4218_ctl_write(tempctl);
1166 /* Gain has 16 steps from 0 to 15. These are in 1.5dB increments from
1167 * 0 (no gain) to 22.5 dB.
1169 #define CS_RECLEVEL_TO_GAIN(v) \
1170 ((v) < 0 ? 0 : (v) > 100 ? 15 : (v) * 3 / 20)
1171 #define CS_GAIN_TO_RECLEVEL(v) (((v) * 20 + 2) / 3)
1173 static int cs_get_gain(uint reg)
1177 gain = CS_GAIN_TO_RECLEVEL(CS_LGAIN_GET(reg));
1178 gain |= CS_GAIN_TO_RECLEVEL(CS_RGAIN_GET(reg)) << 8;
1182 static int cs_set_gain(int gain)
1186 tempctl = cs4218_control & ~(CS_LGAIN | CS_RGAIN);
1187 tempctl |= CS_LGAIN_SET(CS_RECLEVEL_TO_GAIN(gain & 0xff));
1188 tempctl |= CS_RGAIN_SET(CS_RECLEVEL_TO_GAIN((gain >> 8) & 0xff));
1189 gain = cs_get_gain(tempctl);
1191 if (tempctl != cs4218_control) {
1192 cs4218_ctl_write(tempctl);
1197 static int CS_SetVolume(int volume)
1199 return cs_volume_setter(volume, CS_MUTE);
1202 static void CS_Play(void)
1205 unsigned long flags;
1206 volatile cbd_t *bdp;
1207 volatile cpm8xx_t *cp;
1209 /* Protect buffer */
1210 spin_lock_irqsave(&cs4218_lock, flags);
1212 if (awacs_beep_state) {
1213 /* sound takes precedence over beeps */
1214 out_le32(&awacs_txdma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
1215 out_le32(&awacs->control,
1216 (in_le32(&awacs->control) & ~0x1f00)
1217 | (awacs_rate_index << 8));
1218 out_le32(&awacs->byteswap, sound.hard.format != AFMT_S16_BE);
1219 out_le32(&awacs_txdma->cmdptr, virt_to_bus(&(awacs_tx_cmds[(sq.front+sq.active) % sq.max_count])));
1222 awacs_beep_state = 0;
1225 i = sq.front + sq.active;
1226 if (i >= sq.max_count)
1228 while (sq.active < 2 && sq.active < sq.count) {
1229 count = (sq.count == sq.active + 1)?sq.rear_size:sq.block_size;
1230 if (count < sq.block_size && !sq.syncing)
1231 /* last block not yet filled, and we're not syncing. */
1235 bdp->cbd_datlen = count;
1237 flush_dcache_range((ulong)sound_buffers[i],
1238 (ulong)(sound_buffers[i] + count));
1240 if (++i >= sq.max_count)
1243 if (sq.active == 0) {
1244 /* The SMC does not load its fifo until the first
1245 * TDM frame pulse, so the transmit data gets shifted
1246 * by one word. To compensate for this, we incorrectly
1247 * transmit the first buffer and shorten it by one
1248 * word. Subsequent buffers are then aligned properly.
1250 bdp->cbd_datlen -= 2;
1252 /* Start up the SMC Transmitter.
1255 cp->cp_smc[1].smc_smcmr |= SMCMR_TEN;
1256 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC2,
1257 CPM_CR_RESTART_TX) | CPM_CR_FLG;
1258 while (cp->cp_cpcr & CPM_CR_FLG);
1261 /* Buffer is ready now.
1263 bdp->cbd_sc |= BD_SC_READY;
1267 spin_unlock_irqrestore(&cs4218_lock, flags);
1271 static void CS_Record(void)
1273 unsigned long flags;
1279 /* Protect buffer */
1280 spin_lock_irqsave(&cs4218_lock, flags);
1282 /* This is all we have to do......Just start it up.
1284 sp = &cpmp->cp_smc[1];
1285 sp->smc_smcmr |= SMCMR_REN;
1289 spin_unlock_irqrestore(&cs4218_lock, flags);
1294 cs4218_tdm_tx_intr(void *devid)
1297 volatile cbd_t *bdp;
1299 while (sq.active > 0) {
1301 if (bdp->cbd_sc & BD_SC_READY)
1302 break; /* this frame is still going */
1305 if (++i >= sq.max_count)
1309 WAKE_UP(sq.action_queue);
1315 WAKE_UP(sq.sync_queue);
1320 cs4218_tdm_rx_intr(void *devid)
1323 /* We want to blow 'em off when shutting down.
1325 if (read_sq.active == 0)
1328 /* Check multiple buffers in case we were held off from
1329 * interrupt processing for a long time. Geeze, I really hope
1330 * this doesn't happen.
1332 while ((rx_base[read_sq.rear].cbd_sc & BD_SC_EMPTY) == 0) {
1334 /* Invalidate the data cache range for this buffer.
1336 invalidate_dcache_range(
1337 (uint)(sound_read_buffers[read_sq.rear]),
1338 (uint)(sound_read_buffers[read_sq.rear] + read_sq.block_size));
1340 /* Make buffer available again and move on.
1342 rx_base[read_sq.rear].cbd_sc |= BD_SC_EMPTY;
1345 /* Wrap the buffer ring.
1347 if (read_sq.rear >= read_sq.max_active)
1350 /* If we have caught up to the front buffer, bump it.
1351 * This will cause weird (but not fatal) results if the
1352 * read loop is currently using this buffer. The user is
1353 * behind in this case anyway, so weird things are going
1356 if (read_sq.rear == read_sq.front) {
1358 if (read_sq.front >= read_sq.max_active)
1363 WAKE_UP(read_sq.action_queue);
1366 static void cs_nosound(unsigned long xx)
1368 unsigned long flags;
1370 /* not sure if this is needed, since hardware command is #if 0'd */
1371 spin_lock_irqsave(&cs4218_lock, flags);
1374 st_le16(&beep_dbdma_cmd->command, DBDMA_STOP);
1378 spin_unlock_irqrestore(&cs4218_lock, flags);
1381 static DEFINE_TIMER(beep_timer, cs_nosound, 0, 0);
1383 static void cs_mksound(unsigned int hz, unsigned int ticks)
1385 unsigned long flags;
1386 int beep_speed = BEEP_SPEED;
1387 int srate = cs4218_freqs[beep_speed];
1388 int period, ncycles, nsamples;
1391 static int beep_hz_cache;
1392 static int beep_nsamples_cache;
1393 static int beep_volume_cache;
1395 if (hz <= srate / BEEP_BUFLEN || hz > srate / 2) {
1397 /* this is a hack for broken X server code */
1401 /* cancel beep currently playing */
1406 /* lock while modifying beep_timer */
1407 spin_lock_irqsave(&cs4218_lock, flags);
1408 del_timer(&beep_timer);
1410 beep_timer.expires = jiffies + ticks;
1411 add_timer(&beep_timer);
1413 if (beep_playing || sq.active || beep_buf == NULL) {
1414 spin_unlock_irqrestore(&cs4218_lock, flags);
1415 return; /* too hard, sorry :-( */
1419 st_le16(&beep_dbdma_cmd->command, OUTPUT_MORE + BR_ALWAYS);
1421 spin_unlock_irqrestore(&cs4218_lock, flags);
1423 if (hz == beep_hz_cache && beep_volume == beep_volume_cache) {
1424 nsamples = beep_nsamples_cache;
1426 period = srate * 256 / hz; /* fixed point */
1427 ncycles = BEEP_BUFLEN * 256 / period;
1428 nsamples = (period * ncycles) >> 8;
1429 f = ncycles * 65536 / nsamples;
1432 for (i = 0; i < nsamples; ++i, p += 2) {
1433 p[0] = p[1] = beep_wform[j >> 8] * beep_volume;
1434 j = (j + f) & 0xffff;
1437 beep_volume_cache = beep_volume;
1438 beep_nsamples_cache = nsamples;
1442 st_le16(&beep_dbdma_cmd->req_count, nsamples*4);
1443 st_le16(&beep_dbdma_cmd->xfer_status, 0);
1444 st_le32(&beep_dbdma_cmd->cmd_dep, virt_to_bus(beep_dbdma_cmd));
1445 st_le32(&beep_dbdma_cmd->phy_addr, virt_to_bus(beep_buf));
1446 awacs_beep_state = 1;
1448 spin_lock_irqsave(&cs4218_lock, flags);
1449 if (beep_playing) { /* i.e. haven't been terminated already */
1450 out_le32(&awacs_txdma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
1451 out_le32(&awacs->control,
1452 (in_le32(&awacs->control) & ~0x1f00)
1453 | (beep_speed << 8));
1454 out_le32(&awacs->byteswap, 0);
1455 out_le32(&awacs_txdma->cmdptr, virt_to_bus(beep_dbdma_cmd));
1456 out_le32(&awacs_txdma->control, RUN | (RUN << 16));
1458 spin_unlock_irqrestore(&cs4218_lock, flags);
1462 static MACHINE mach_cs4218 = {
1463 .owner = THIS_MODULE,
1464 .name = "HIOX CS4218",
1465 .name2 = "Built-in Sound",
1466 .dma_alloc = CS_Alloc,
1467 .dma_free = CS_Free,
1468 .irqinit = CS_IrqInit,
1470 .irqcleanup = CS_IrqCleanup,
1473 .silence = CS_Silence,
1474 .setFormat = CS_SetFormat,
1475 .setVolume = CS_SetVolume,
1480 /*** Mid level stuff *********************************************************/
1483 static void sound_silence(void)
1485 /* update hardware settings one more */
1486 (*sound.mach.init)();
1488 (*sound.mach.silence)();
1492 static void sound_init(void)
1494 (*sound.mach.init)();
1498 static int sound_set_format(int format)
1500 return(*sound.mach.setFormat)(format);
1504 static int sound_set_speed(int speed)
1507 return(sound.soft.speed);
1509 sound.soft.speed = speed;
1510 (*sound.mach.init)();
1511 if (sound.minDev == SND_DEV_DSP)
1512 sound.dsp.speed = sound.soft.speed;
1514 return(sound.soft.speed);
1518 static int sound_set_stereo(int stereo)
1521 return(sound.soft.stereo);
1523 stereo = !!stereo; /* should be 0 or 1 now */
1525 sound.soft.stereo = stereo;
1526 if (sound.minDev == SND_DEV_DSP)
1527 sound.dsp.stereo = stereo;
1528 (*sound.mach.init)();
1534 static int sound_set_volume(int volume)
1536 return(*sound.mach.setVolume)(volume);
1539 static ssize_t sound_copy_translate(const u_char *userPtr,
1541 u_char frame[], ssize_t *frameUsed,
1544 ssize_t (*ct_func)(const u_char *, size_t, u_char *, ssize_t *, ssize_t) = NULL;
1546 switch (sound.soft.format) {
1548 ct_func = sound.trans_write->ct_ulaw;
1551 ct_func = sound.trans_write->ct_alaw;
1554 ct_func = sound.trans_write->ct_s8;
1557 ct_func = sound.trans_write->ct_u8;
1560 ct_func = sound.trans_write->ct_s16be;
1563 ct_func = sound.trans_write->ct_u16be;
1566 ct_func = sound.trans_write->ct_s16le;
1569 ct_func = sound.trans_write->ct_u16le;
1573 return ct_func(userPtr, userCount, frame, frameUsed, frameLeft);
1578 static ssize_t sound_copy_translate_read(const u_char *userPtr,
1580 u_char frame[], ssize_t *frameUsed,
1583 ssize_t (*ct_func)(const u_char *, size_t, u_char *, ssize_t *, ssize_t) = NULL;
1585 switch (sound.soft.format) {
1587 ct_func = sound.trans_read->ct_ulaw;
1590 ct_func = sound.trans_read->ct_alaw;
1593 ct_func = sound.trans_read->ct_s8;
1596 ct_func = sound.trans_read->ct_u8;
1599 ct_func = sound.trans_read->ct_s16be;
1602 ct_func = sound.trans_read->ct_u16be;
1605 ct_func = sound.trans_read->ct_s16le;
1608 ct_func = sound.trans_read->ct_u16le;
1612 return ct_func(userPtr, userCount, frame, frameUsed, frameLeft);
1619 * /dev/mixer abstraction
1622 static int mixer_open(struct inode *inode, struct file *file)
1625 return nonseekable_open(inode, file);
1629 static int mixer_release(struct inode *inode, struct file *file)
1636 static int mixer_ioctl(struct inode *inode, struct file *file, u_int cmd,
1642 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
1643 mixer.modify_counter++;
1644 if (cmd == OSS_GETVERSION)
1645 return IOCTL_OUT(arg, SOUND_VERSION);
1647 case SOUND_MIXER_INFO: {
1649 strlcpy(info.id, "CS4218_TDM", sizeof(info.id));
1650 strlcpy(info.name, "CS4218_TDM", sizeof(info.name));
1651 info.name[sizeof(info.name)-1] = 0;
1652 info.modify_counter = mixer.modify_counter;
1653 if (copy_to_user((int *)arg, &info, sizeof(info)))
1657 case SOUND_MIXER_READ_DEVMASK:
1658 data = SOUND_MASK_VOLUME | SOUND_MASK_LINE
1659 | SOUND_MASK_MIC | SOUND_MASK_RECLEV
1660 | SOUND_MASK_ALTPCM;
1661 return IOCTL_OUT(arg, data);
1662 case SOUND_MIXER_READ_RECMASK:
1663 data = SOUND_MASK_LINE | SOUND_MASK_MIC;
1664 return IOCTL_OUT(arg, data);
1665 case SOUND_MIXER_READ_RECSRC:
1666 if (cs4218_control & CS_DO1)
1667 data = SOUND_MASK_LINE;
1669 data = SOUND_MASK_MIC;
1670 return IOCTL_OUT(arg, data);
1671 case SOUND_MIXER_WRITE_RECSRC:
1672 IOCTL_IN(arg, data);
1673 data &= (SOUND_MASK_LINE | SOUND_MASK_MIC);
1674 if (data & SOUND_MASK_LINE)
1675 tmpcs = cs4218_control |
1676 (CS_ISL | CS_ISR | CS_DO1);
1677 if (data & SOUND_MASK_MIC)
1678 tmpcs = cs4218_control &
1679 ~(CS_ISL | CS_ISR | CS_DO1);
1680 if (tmpcs != cs4218_control)
1681 cs4218_ctl_write(tmpcs);
1682 return IOCTL_OUT(arg, data);
1683 case SOUND_MIXER_READ_STEREODEVS:
1684 data = SOUND_MASK_VOLUME | SOUND_MASK_RECLEV;
1685 return IOCTL_OUT(arg, data);
1686 case SOUND_MIXER_READ_CAPS:
1687 return IOCTL_OUT(arg, 0);
1688 case SOUND_MIXER_READ_VOLUME:
1689 data = (cs4218_control & CS_MUTE)? 0:
1690 cs_get_volume(cs4218_control);
1691 return IOCTL_OUT(arg, data);
1692 case SOUND_MIXER_WRITE_VOLUME:
1693 IOCTL_IN(arg, data);
1694 return IOCTL_OUT(arg, sound_set_volume(data));
1695 case SOUND_MIXER_WRITE_ALTPCM: /* really bell volume */
1696 IOCTL_IN(arg, data);
1697 beep_volume = data & 0xff;
1699 case SOUND_MIXER_READ_ALTPCM:
1700 return IOCTL_OUT(arg, beep_volume);
1701 case SOUND_MIXER_WRITE_RECLEV:
1702 IOCTL_IN(arg, data);
1703 data = cs_set_gain(data);
1704 return IOCTL_OUT(arg, data);
1705 case SOUND_MIXER_READ_RECLEV:
1706 data = cs_get_gain(cs4218_control);
1707 return IOCTL_OUT(arg, data);
1714 static const struct file_operations mixer_fops =
1716 .owner = THIS_MODULE,
1717 .llseek = sound_lseek,
1718 .ioctl = mixer_ioctl,
1720 .release = mixer_release,
1724 static void __init mixer_init(void)
1726 mixer_unit = register_sound_mixer(&mixer_fops, -1);
1734 /* Set Line input, no gain, no attenuation.
1736 cs4218_control = CS_ISL | CS_ISR | CS_DO1;
1737 cs4218_control |= CS_LGAIN_SET(0) | CS_RGAIN_SET(0);
1738 cs4218_control |= CS_LATTEN_SET(0) | CS_RATTEN_SET(0);
1739 cs4218_ctl_write(cs4218_control);
1744 * Sound queue stuff, the heart of the driver
1748 static int sq_allocate_buffers(void)
1754 sound_buffers = kmalloc (numBufs * sizeof(char *), GFP_KERNEL);
1757 for (i = 0; i < numBufs; i++) {
1758 sound_buffers[i] = sound.mach.dma_alloc (bufSize << 10, GFP_KERNEL);
1759 if (!sound_buffers[i]) {
1761 sound.mach.dma_free (sound_buffers[i], bufSize << 10);
1762 kfree (sound_buffers);
1771 static void sq_release_buffers(void)
1775 if (sound_buffers) {
1776 for (i = 0; i < numBufs; i++)
1777 sound.mach.dma_free (sound_buffers[i], bufSize << 10);
1778 kfree (sound_buffers);
1784 static int sq_allocate_read_buffers(void)
1788 if (sound_read_buffers)
1790 sound_read_buffers = kmalloc(numReadBufs * sizeof(char *), GFP_KERNEL);
1791 if (!sound_read_buffers)
1793 for (i = 0; i < numBufs; i++) {
1794 sound_read_buffers[i] = sound.mach.dma_alloc (readbufSize<<10,
1796 if (!sound_read_buffers[i]) {
1798 sound.mach.dma_free (sound_read_buffers[i],
1800 kfree (sound_read_buffers);
1801 sound_read_buffers = 0;
1808 static void sq_release_read_buffers(void)
1812 if (sound_read_buffers) {
1813 cpmp->cp_smc[1].smc_smcmr &= ~SMCMR_REN;
1814 for (i = 0; i < numReadBufs; i++)
1815 sound.mach.dma_free (sound_read_buffers[i],
1817 kfree (sound_read_buffers);
1818 sound_read_buffers = 0;
1823 static void sq_setup(int numBufs, int bufSize, char **write_buffers)
1826 volatile cbd_t *bdp;
1827 volatile cpm8xx_t *cp;
1830 /* Make sure the SMC transmit is shut down.
1833 sp = &cpmp->cp_smc[1];
1834 sp->smc_smcmr &= ~SMCMR_TEN;
1836 sq.max_count = numBufs;
1837 sq.max_active = numBufs;
1838 sq.block_size = bufSize;
1839 sq.buffers = write_buffers;
1841 sq.front = sq.count = 0;
1847 for (i=0; i<numBufs; i++) {
1848 bdp->cbd_bufaddr = virt_to_bus(write_buffers[i]);
1852 /* This causes the SMC to sync up with the first buffer again.
1854 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC2, CPM_CR_INIT_TX) | CPM_CR_FLG;
1855 while (cp->cp_cpcr & CPM_CR_FLG);
1858 static void read_sq_setup(int numBufs, int bufSize, char **read_buffers)
1861 volatile cbd_t *bdp;
1862 volatile cpm8xx_t *cp;
1865 /* Make sure the SMC receive is shut down.
1868 sp = &cpmp->cp_smc[1];
1869 sp->smc_smcmr &= ~SMCMR_REN;
1871 read_sq.max_count = numBufs;
1872 read_sq.max_active = numBufs;
1873 read_sq.block_size = bufSize;
1874 read_sq.buffers = read_buffers;
1876 read_sq.front = read_sq.count = 0;
1878 read_sq.rear_size = 0;
1879 read_sq.syncing = 0;
1883 for (i=0; i<numReadBufs; i++) {
1884 bdp->cbd_bufaddr = virt_to_bus(read_buffers[i]);
1885 bdp->cbd_datlen = read_sq.block_size;
1889 /* This causes the SMC to sync up with the first buffer again.
1891 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC2, CPM_CR_INIT_RX) | CPM_CR_FLG;
1892 while (cp->cp_cpcr & CPM_CR_FLG);
1896 static void sq_play(void)
1898 (*sound.mach.play)();
1902 /* ++TeSche: radically changed this one too */
1904 static ssize_t sq_write(struct file *file, const char *src, size_t uLeft,
1907 ssize_t uWritten = 0;
1909 ssize_t uUsed, bUsed, bLeft;
1911 /* ++TeSche: Is something like this necessary?
1912 * Hey, that's an honest question! Or does any other part of the
1913 * filesystem already checks this situation? I really don't know.
1918 /* The interrupt doesn't start to play the last, incomplete frame.
1919 * Thus we can append to it without disabling the interrupts! (Note
1920 * also that sq.rear isn't affected by the interrupt.)
1923 if (sq.count > 0 && (bLeft = sq.block_size-sq.rear_size) > 0) {
1924 dest = sq_block_address(sq.rear);
1925 bUsed = sq.rear_size;
1926 uUsed = sound_copy_translate(src, uLeft, dest, &bUsed, bLeft);
1932 sq.rear_size = bUsed;
1936 while (sq.count == sq.max_active) {
1938 if (NON_BLOCKING(sq.open_mode))
1939 return uWritten > 0 ? uWritten : -EAGAIN;
1940 SLEEP(sq.action_queue);
1941 if (SIGNAL_RECEIVED)
1942 return uWritten > 0 ? uWritten : -EINTR;
1945 /* Here, we can avoid disabling the interrupt by first
1946 * copying and translating the data, and then updating
1947 * the sq variables. Until this is done, the interrupt
1948 * won't see the new frame and we can work on it
1952 dest = sq_block_address((sq.rear+1) % sq.max_count);
1954 bLeft = sq.block_size;
1955 uUsed = sound_copy_translate(src, uLeft, dest, &bUsed, bLeft);
1962 sq.rear = (sq.rear+1) % sq.max_count;
1963 sq.rear_size = bUsed;
1966 } while (bUsed); /* uUsed may have been 0 */
1970 return uUsed < 0? uUsed: uWritten;
1976 /* Here is how the values are used for reading.
1977 * The value 'active' simply indicates the DMA is running. This is
1978 * done so the driver semantics are DMA starts when the first read is
1979 * posted. The value 'front' indicates the buffer we should next
1980 * send to the user. The value 'rear' indicates the buffer the DMA is
1981 * currently filling. When 'front' == 'rear' the buffer "ring" is
1982 * empty (we always have an empty available). The 'rear_size' is used
1983 * to track partial offsets into the current buffer. Right now, I just keep
1984 * The DMA running. If the reader can't keep up, the interrupt tosses
1985 * the oldest buffer. We could also shut down the DMA in this case.
1987 static ssize_t sq_read(struct file *file, char *dst, size_t uLeft,
1991 ssize_t uRead, bLeft, bUsed, uUsed;
1996 if (!read_sq.active)
1997 CS_Record(); /* Kick off the record process. */
2001 /* Move what the user requests, depending upon other options.
2005 /* When front == rear, the DMA is not done yet.
2007 while (read_sq.front == read_sq.rear) {
2008 if (NON_BLOCKING(read_sq.open_mode)) {
2009 return uRead > 0 ? uRead : -EAGAIN;
2011 SLEEP(read_sq.action_queue);
2012 if (SIGNAL_RECEIVED)
2013 return uRead > 0 ? uRead : -EINTR;
2016 /* The amount we move is either what is left in the
2017 * current buffer or what the user wants.
2019 bLeft = read_sq.block_size - read_sq.rear_size;
2020 bUsed = read_sq.rear_size;
2021 uUsed = sound_copy_translate_read(dst, uLeft,
2022 read_sq.buffers[read_sq.front], &bUsed, bLeft);
2028 read_sq.rear_size += bUsed;
2029 if (read_sq.rear_size >= read_sq.block_size) {
2030 read_sq.rear_size = 0;
2032 if (read_sq.front >= read_sq.max_active)
2039 static int sq_open(struct inode *inode, struct file *file)
2043 if (file->f_mode & FMODE_WRITE) {
2046 if (NON_BLOCKING(file->f_flags))
2050 SLEEP(sq.open_queue);
2051 if (SIGNAL_RECEIVED)
2055 sq.busy = 1; /* Let's play spot-the-race-condition */
2057 if (sq_allocate_buffers()) goto err_out_nobusy;
2059 sq_setup(numBufs, bufSize<<10,sound_buffers);
2060 sq.open_mode = file->f_mode;
2064 if (file->f_mode & FMODE_READ) {
2067 if (NON_BLOCKING(file->f_flags))
2070 while (read_sq.busy) {
2071 SLEEP(read_sq.open_queue);
2072 if (SIGNAL_RECEIVED)
2078 if (sq_allocate_read_buffers()) goto err_out_nobusy;
2080 read_sq_setup(numReadBufs,readbufSize<<10, sound_read_buffers);
2081 read_sq.open_mode = file->f_mode;
2084 /* Start up the 4218 by:
2088 *((volatile uint *)HIOX_CSR4_ADDR) &= ~HIOX_CSR4_RSTAUDIO;
2090 *((volatile uint *)HIOX_CSR4_ADDR) |= HIOX_CSR4_ENAUDIO;
2092 *((volatile uint *)HIOX_CSR4_ADDR) |= HIOX_CSR4_RSTAUDIO;
2094 /* We need to send the current control word in case someone
2095 * opened /dev/mixer and changed things while we were shut
2096 * down. Chances are good the initialization that follows
2097 * would have done this, but it is still possible it wouldn't.
2099 cs4218_ctl_write(cs4218_control);
2101 sound.minDev = iminor(inode) & 0x0f;
2102 sound.soft = sound.dsp;
2103 sound.hard = sound.dsp;
2105 if ((iminor(inode) & 0x0f) == SND_DEV_AUDIO) {
2106 sound_set_speed(8000);
2107 sound_set_stereo(0);
2108 sound_set_format(AFMT_MU_LAW);
2111 return nonseekable_open(inode, file);
2114 if (file->f_mode & FMODE_WRITE) {
2116 WAKE_UP(sq.open_queue);
2118 if (file->f_mode & FMODE_READ) {
2120 WAKE_UP(read_sq.open_queue);
2127 static void sq_reset(void)
2132 sq.front = (sq.rear+1) % sq.max_count;
2139 static int sq_fsync(struct file *filp, struct dentry *dentry)
2144 sq_play(); /* there may be an incomplete frame waiting */
2147 SLEEP(sq.sync_queue);
2148 if (SIGNAL_RECEIVED) {
2149 /* While waiting for audio output to drain, an
2150 * interrupt occurred. Stop audio output immediately
2151 * and clear the queue. */
2162 static int sq_release(struct inode *inode, struct file *file)
2167 rc = sq_fsync(file, file->f_path.dentry);
2168 sound.soft = sound.dsp;
2169 sound.hard = sound.dsp;
2172 sq_release_read_buffers();
2173 sq_release_buffers();
2175 if (file->f_mode & FMODE_READ) {
2177 WAKE_UP(read_sq.open_queue);
2180 if (file->f_mode & FMODE_WRITE) {
2182 WAKE_UP(sq.open_queue);
2185 /* Shut down the SMC.
2187 cpmp->cp_smc[1].smc_smcmr &= ~(SMCMR_TEN | SMCMR_REN);
2189 /* Shut down the codec.
2191 *((volatile uint *)HIOX_CSR4_ADDR) |= HIOX_CSR4_RSTAUDIO;
2193 *((volatile uint *)HIOX_CSR4_ADDR) &= ~HIOX_CSR4_ENAUDIO;
2195 /* Wake up a process waiting for the queue being released.
2196 * Note: There may be several processes waiting for a call
2197 * to open() returning. */
2203 static int sq_ioctl(struct inode *inode, struct file *file, u_int cmd,
2215 case SNDCTL_DSP_RESET:
2218 case SNDCTL_DSP_POST:
2219 case SNDCTL_DSP_SYNC:
2220 return sq_fsync(file, file->f_path.dentry);
2222 /* ++TeSche: before changing any of these it's
2223 * probably wise to wait until sound playing has
2225 case SNDCTL_DSP_SPEED:
2226 sq_fsync(file, file->f_path.dentry);
2227 IOCTL_IN(arg, data);
2228 return IOCTL_OUT(arg, sound_set_speed(data));
2229 case SNDCTL_DSP_STEREO:
2230 sq_fsync(file, file->f_path.dentry);
2231 IOCTL_IN(arg, data);
2232 return IOCTL_OUT(arg, sound_set_stereo(data));
2233 case SOUND_PCM_WRITE_CHANNELS:
2234 sq_fsync(file, file->f_path.dentry);
2235 IOCTL_IN(arg, data);
2236 return IOCTL_OUT(arg, sound_set_stereo(data-1)+1);
2237 case SNDCTL_DSP_SETFMT:
2238 sq_fsync(file, file->f_path.dentry);
2239 IOCTL_IN(arg, data);
2240 return IOCTL_OUT(arg, sound_set_format(data));
2241 case SNDCTL_DSP_GETFMTS:
2243 if (sound.trans_write) {
2244 if (sound.trans_write->ct_ulaw)
2246 if (sound.trans_write->ct_alaw)
2248 if (sound.trans_write->ct_s8)
2250 if (sound.trans_write->ct_u8)
2252 if (sound.trans_write->ct_s16be)
2254 if (sound.trans_write->ct_u16be)
2256 if (sound.trans_write->ct_s16le)
2258 if (sound.trans_write->ct_u16le)
2261 return IOCTL_OUT(arg, fmt);
2262 case SNDCTL_DSP_GETBLKSIZE:
2263 size = sq.block_size
2264 * sound.soft.size * (sound.soft.stereo + 1)
2265 / (sound.hard.size * (sound.hard.stereo + 1));
2266 return IOCTL_OUT(arg, size);
2267 case SNDCTL_DSP_SUBDIVIDE:
2269 #if 0 /* Sorry can't do this at the moment. The CPM allocated buffers
2270 * long ago that can't be changed.
2272 case SNDCTL_DSP_SETFRAGMENT:
2273 if (sq.count || sq.active || sq.syncing)
2275 IOCTL_IN(arg, size);
2277 if (nbufs < 2 || nbufs > numBufs)
2280 if (size >= 8 && size <= 30) {
2282 size *= sound.hard.size * (sound.hard.stereo + 1);
2283 size /= sound.soft.size * (sound.soft.stereo + 1);
2284 if (size > (bufSize << 10))
2285 size = bufSize << 10;
2287 size = bufSize << 10;
2288 sq_setup(numBufs, size, sound_buffers);
2289 sq.max_active = nbufs;
2294 return mixer_ioctl(inode, file, cmd, arg);
2301 static const struct file_operations sq_fops =
2303 .owner = THIS_MODULE,
2304 .llseek = sound_lseek,
2305 .read = sq_read, /* sq_read */
2309 .release = sq_release,
2313 static void __init sq_init(void)
2315 sq_unit = register_sound_dsp(&sq_fops, -1);
2319 init_waitqueue_head(&sq.action_queue);
2320 init_waitqueue_head(&sq.open_queue);
2321 init_waitqueue_head(&sq.sync_queue);
2322 init_waitqueue_head(&read_sq.action_queue);
2323 init_waitqueue_head(&read_sq.open_queue);
2324 init_waitqueue_head(&read_sq.sync_queue);
2329 /* whatever you like as startup mode for /dev/dsp,
2330 * (/dev/audio hasn't got a startup mode). note that
2331 * once changed a new open() will *not* restore these!
2333 sound.dsp.format = AFMT_S16_BE;
2334 sound.dsp.stereo = 1;
2335 sound.dsp.size = 16;
2337 /* set minimum rate possible without expanding */
2338 sound.dsp.speed = 8000;
2340 /* before the first open to /dev/dsp this wouldn't be set */
2341 sound.soft = sound.dsp;
2342 sound.hard = sound.dsp;
2352 /* state.buf should not overflow! */
2354 static int state_open(struct inode *inode, struct file *file)
2356 char *buffer = state.buf, *mach = "", cs4218_buf[50];
2365 sprintf(cs4218_buf, "Crystal CS4218 on TDM, ");
2368 len += sprintf(buffer+len, "%sDMA sound driver:\n", mach);
2370 len += sprintf(buffer+len, "\tsound.format = 0x%x", sound.soft.format);
2371 switch (sound.soft.format) {
2373 len += sprintf(buffer+len, " (mu-law)");
2376 len += sprintf(buffer+len, " (A-law)");
2379 len += sprintf(buffer+len, " (unsigned 8 bit)");
2382 len += sprintf(buffer+len, " (signed 8 bit)");
2385 len += sprintf(buffer+len, " (signed 16 bit big)");
2388 len += sprintf(buffer+len, " (unsigned 16 bit big)");
2391 len += sprintf(buffer+len, " (signed 16 bit little)");
2394 len += sprintf(buffer+len, " (unsigned 16 bit little)");
2397 len += sprintf(buffer+len, "\n");
2398 len += sprintf(buffer+len, "\tsound.speed = %dHz (phys. %dHz)\n",
2399 sound.soft.speed, sound.hard.speed);
2400 len += sprintf(buffer+len, "\tsound.stereo = 0x%x (%s)\n",
2401 sound.soft.stereo, sound.soft.stereo ? "stereo" : "mono");
2402 len += sprintf(buffer+len, "\tsq.block_size = %d sq.max_count = %d"
2403 " sq.max_active = %d\n",
2404 sq.block_size, sq.max_count, sq.max_active);
2405 len += sprintf(buffer+len, "\tsq.count = %d sq.rear_size = %d\n", sq.count,
2407 len += sprintf(buffer+len, "\tsq.active = %d sq.syncing = %d\n",
2408 sq.active, sq.syncing);
2410 return nonseekable_open(inode, file);
2414 static int state_release(struct inode *inode, struct file *file)
2421 static ssize_t state_read(struct file *file, char *buf, size_t count,
2424 int n = state.len - state.ptr;
2429 if (copy_to_user(buf, &state.buf[state.ptr], n))
2436 static const struct file_operations state_fops =
2438 .owner = THIS_MODULE,
2439 .llseek = sound_lseek,
2442 .release = state_release,
2446 static void __init state_init(void)
2448 state_unit = register_sound_special(&state_fops, SND_DEV_STATUS);
2455 /*** Common stuff ********************************************************/
2457 static long long sound_lseek(struct file *file, long long offset, int orig)
2463 /*** Config & Setup **********************************************************/
2466 int __init tdm8xx_sound_init(void)
2470 volatile uint *sirp;
2471 volatile cbd_t *bdp;
2472 volatile cpm8xx_t *cp;
2474 volatile smc_uart_t *up;
2475 volatile immap_t *immap;
2479 /* Program the SI/TSA to use TDMa, connected to SMC2, for 4 bytes.
2481 cp = cpmp; /* Get pointer to Communication Processor */
2482 immap = (immap_t *)IMAP_ADDR; /* and to internal registers */
2484 /* Set all TDMa control bits to zero. This enables most features
2487 cp->cp_simode &= ~0x00000fff;
2489 /* Enable common receive/transmit clock pins, use IDL format.
2490 * Sync on falling edge, transmit rising clock, receive falling
2491 * clock, delay 1 bit on both Tx and Rx. Common Tx/Rx clocks and
2493 * Connect SMC2 to TSA.
2495 cp->cp_simode |= 0x80000141;
2497 /* Configure port A pins for TDMa operation.
2498 * The RPX-Lite (MPC850/823) loses SMC2 when TDM is used.
2500 immap->im_ioport.iop_papar |= 0x01c0; /* Enable TDMa functions */
2501 immap->im_ioport.iop_padir |= 0x00c0; /* Enable TDMa Tx/Rx */
2502 immap->im_ioport.iop_padir &= ~0x0100; /* Enable L1RCLKa */
2504 immap->im_ioport.iop_pcpar |= 0x0800; /* Enable L1RSYNCa */
2505 immap->im_ioport.iop_pcdir &= ~0x0800;
2507 /* Initialize the SI TDM routing table. We use TDMa only.
2508 * The receive table and transmit table each have only one
2509 * entry, to capture/send four bytes after each frame pulse.
2510 * The 16-bit ram entry is 0000 0001 1000 1111. (SMC2)
2513 sirp = (uint *)cp->cp_siram;
2515 *sirp = 0x018f0000; /* Receive entry */
2517 *sirp = 0x018f0000; /* Tramsmit entry */
2519 /* Enable single TDMa routing.
2521 cp->cp_sigmr = 0x04;
2523 /* Initialize the SMC for transparent operation.
2525 sp = &cpmp->cp_smc[1];
2526 up = (smc_uart_t *)&cp->cp_dparam[PROFF_SMC2];
2528 /* We need to allocate a transmit and receive buffer
2529 * descriptors from dual port ram.
2531 dp_addr = cpm_dpalloc(sizeof(cbd_t) * numReadBufs, 8);
2533 /* Set the physical address of the host memory
2534 * buffers in the buffer descriptors, and the
2535 * virtual address for us to work with.
2537 bdp = (cbd_t *)&cp->cp_dpmem[dp_addr];
2538 up->smc_rbase = dp_offset;
2539 rx_cur = rx_base = (cbd_t *)bdp;
2541 for (i=0; i<(numReadBufs-1); i++) {
2542 bdp->cbd_bufaddr = 0;
2543 bdp->cbd_datlen = 0;
2544 bdp->cbd_sc = BD_SC_EMPTY | BD_SC_INTRPT;
2547 bdp->cbd_bufaddr = 0;
2548 bdp->cbd_datlen = 0;
2549 bdp->cbd_sc = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT;
2551 /* Now, do the same for the transmit buffers.
2553 dp_offset = cpm_dpalloc(sizeof(cbd_t) * numBufs, 8);
2555 bdp = (cbd_t *)&cp->cp_dpmem[dp_addr];
2556 up->smc_tbase = dp_offset;
2557 tx_cur = tx_base = (cbd_t *)bdp;
2559 for (i=0; i<(numBufs-1); i++) {
2560 bdp->cbd_bufaddr = 0;
2561 bdp->cbd_datlen = 0;
2562 bdp->cbd_sc = BD_SC_INTRPT;
2565 bdp->cbd_bufaddr = 0;
2566 bdp->cbd_datlen = 0;
2567 bdp->cbd_sc = (BD_SC_WRAP | BD_SC_INTRPT);
2569 /* Set transparent SMC mode.
2570 * A few things are specific to our application. The codec interface
2571 * is MSB first, hence the REVD selection. The CD/CTS pulse are
2572 * used by the TSA to indicate the frame start to the SMC.
2574 up->smc_rfcr = SCC_EB;
2575 up->smc_tfcr = SCC_EB;
2576 up->smc_mrblr = readbufSize * 1024;
2578 /* Set 16-bit reversed data, transparent mode.
2580 sp->smc_smcmr = smcr_mk_clen(15) |
2581 SMCMR_SM_TRANS | SMCMR_REVD | SMCMR_BS;
2583 /* Enable and clear events.
2584 * Because of FIFO delays, all we need is the receive interrupt
2585 * and we can process both the current receive and current
2586 * transmit interrupt within a few microseconds of the transmit.
2588 sp->smc_smce = 0xff;
2589 sp->smc_smcm = SMCM_TXE | SMCM_TX | SMCM_RX;
2591 /* Send the CPM an initialize command.
2593 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC2,
2594 CPM_CR_INIT_TRX) | CPM_CR_FLG;
2595 while (cp->cp_cpcr & CPM_CR_FLG);
2597 sound.mach = mach_cs4218;
2600 /* Initialize beep stuff */
2601 orig_mksound = kd_mksound;
2602 kd_mksound = cs_mksound;
2603 beep_buf = kmalloc(BEEP_BUFLEN * 4, GFP_KERNEL);
2604 if (beep_buf == NULL)
2605 printk(KERN_WARNING "dmasound: no memory for "
2611 /* Initialize the software SPI.
2615 /* Set up sound queue, /dev/audio and /dev/dsp. */
2617 /* Set default settings. */
2620 /* Set up /dev/sndstat. */
2623 /* Set up /dev/mixer. */
2626 if (!sound.mach.irqinit()) {
2627 printk(KERN_ERR "DMA sound driver: Interrupt initialization failed\n");
2634 printk(KERN_INFO "DMA sound driver installed, using %d buffers of %dk.\n",
2640 /* Due to FIFOs and bit delays, the transmit interrupt occurs a few
2641 * microseconds ahead of the receive interrupt.
2642 * When we get an interrupt, we service the transmit first, then
2643 * check for a receive to prevent the overhead of returning through
2644 * the interrupt handler only to get back here right away during
2645 * full duplex operation.
2648 cs4218_intr(void *dev_id)
2651 volatile cpm8xx_t *cp;
2653 sp = &cpmp->cp_smc[1];
2655 if (sp->smc_smce & SCCM_TX) {
2656 sp->smc_smce = SCCM_TX;
2657 cs4218_tdm_tx_intr((void *)sp);
2660 if (sp->smc_smce & SCCM_RX) {
2661 sp->smc_smce = SCCM_RX;
2662 cs4218_tdm_rx_intr((void *)sp);
2665 if (sp->smc_smce & SCCM_TXE) {
2666 /* Transmit underrun. This happens with the application
2667 * didn't keep up sending buffers. We tell the SMC to
2668 * restart, which will cause it to poll the current (next)
2669 * BD. If the user supplied data since this occurred,
2670 * we just start running again. If they didn't, the SMC
2671 * will poll the descriptor until data is placed there.
2673 sp->smc_smce = SCCM_TXE;
2674 cp = cpmp; /* Get pointer to Communication Processor */
2675 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC2,
2676 CPM_CR_RESTART_TX) | CPM_CR_FLG;
2677 while (cp->cp_cpcr & CPM_CR_FLG);
2682 #define MAXARGS 8 /* Should be sufficient for now */
2684 void __init dmasound_setup(char *str, int *ints)
2686 /* check the bootstrap parameter for "dmasound=" */
2690 if ((ints[3] < 0) || (ints[3] > MAX_CATCH_RADIUS))
2691 printk("dmasound_setup: invalid catch radius, using default = %d\n", catchRadius);
2693 catchRadius = ints[3];
2696 if (ints[1] < MIN_BUFFERS)
2697 printk("dmasound_setup: invalid number of buffers, using default = %d\n", numBufs);
2700 if (ints[2] < MIN_BUFSIZE || ints[2] > MAX_BUFSIZE)
2701 printk("dmasound_setup: invalid buffer size, using default = %d\n", bufSize);
2708 printk("dmasound_setup: invalid number of arguments\n");
2712 /* Software SPI functions.
2713 * These are on Port B.
2715 #define PB_SPICLK ((uint)0x00000002)
2716 #define PB_SPIMOSI ((uint)0x00000004)
2717 #define PB_SPIMISO ((uint)0x00000008)
2720 void sw_spi_init(void)
2722 volatile cpm8xx_t *cp;
2723 volatile uint *hcsr4;
2725 hcsr4 = (volatile uint *)HIOX_CSR4_ADDR;
2726 cp = cpmp; /* Get pointer to Communication Processor */
2728 *hcsr4 &= ~HIOX_CSR4_AUDSPISEL; /* Disable SPI select */
2730 /* Make these Port B signals general purpose I/O.
2731 * First, make sure the clock is low.
2733 cp->cp_pbdat &= ~PB_SPICLK;
2734 cp->cp_pbpar &= ~(PB_SPICLK | PB_SPIMOSI | PB_SPIMISO);
2736 /* Clock and Master Output are outputs.
2738 cp->cp_pbdir |= (PB_SPICLK | PB_SPIMOSI);
2742 cp->cp_pbdir &= ~PB_SPIMISO;
2746 /* Write the CS4218 control word out the SPI port. While the
2747 * the control word is going out, the status word is arriving.
2750 uint cs4218_ctl_write(uint ctlreg)
2754 sw_spi_io((u_char *)&ctlreg, (u_char *)&status, 4);
2756 /* Shadow the control register.....I guess we could do
2757 * the same for the status, but for now we just return it
2758 * and let the caller decide.
2760 cs4218_control = ctlreg;
2765 void sw_spi_io(u_char *obuf, u_char *ibuf, uint bcnt)
2768 u_char outbyte, inbyte;
2769 volatile cpm8xx_t *cp;
2770 volatile uint *hcsr4;
2772 hcsr4 = (volatile uint *)HIOX_CSR4_ADDR;
2773 cp = cpmp; /* Get pointer to Communication Processor */
2775 /* The timing on the bus is pretty slow. Code inefficiency
2776 * and eieio() is our friend here :-).
2778 cp->cp_pbdat &= ~PB_SPICLK;
2779 *hcsr4 |= HIOX_CSR4_AUDSPISEL; /* Enable SPI select */
2782 /* Clock in/out the bytes. Data is valid on the falling edge
2783 * of the clock. Data is MSB first.
2785 for (i=0; i<bcnt; i++) {
2788 for (bits=0; bits<8; bits++) {
2790 cp->cp_pbdat |= PB_SPICLK;
2793 cp->cp_pbdat |= PB_SPIMOSI;
2795 cp->cp_pbdat &= ~PB_SPIMOSI;
2797 cp->cp_pbdat &= ~PB_SPICLK;
2801 if (cp->cp_pbdat & PB_SPIMISO)
2807 *hcsr4 &= ~HIOX_CSR4_AUDSPISEL; /* Disable SPI select */
2811 void cleanup_module(void)
2813 if (irq_installed) {
2816 sound.mach.irqcleanup();
2820 sq_release_read_buffers();
2821 sq_release_buffers();
2823 if (mixer_unit >= 0)
2824 unregister_sound_mixer(mixer_unit);
2825 if (state_unit >= 0)
2826 unregister_sound_special(state_unit);
2828 unregister_sound_dsp(sq_unit);
2831 module_init(tdm8xx_sound_init);
2832 module_exit(cleanup_module);