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authorJoachim Foerster <JOFT@gmx.de>2007-11-05 10:06:01 -0500
committerJaroslav Kysela <perex@perex.cz>2008-01-31 11:29:15 -0500
commita9f00d8df2115b396f13ea74b835f18215a871cc (patch)
tree2af215341e8ff1ca72de73cabda2e31d122db025 /sound/drivers
parentf1f208d0b4fb79f99d2ca5031c61ff5b52e42e75 (diff)
[ALSA] Xilinx ML403 AC97 Controller Reference device driver
Add ALSA support for the opb_ac97_controller_ref_v1_00_a ip core found in Xilinx' ML403 reference design. Known issue: Currently this driver hits a WARN_ON_ONCE(1) statement in kernel/irq/resend.c (line 70). According to Linus (http://lkml.org/lkml/2007/8/5/5) this may be ignored, right? I haven't had a look into this 'problem' yet. Signed-off-by: Joachim Foerster <JOFT@gmx.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound/drivers')
-rw-r--r--sound/drivers/Kconfig12
-rw-r--r--sound/drivers/Makefile2
-rw-r--r--sound/drivers/ml403-ac97cr.c1353
-rw-r--r--sound/drivers/pcm-indirect2.c591
-rw-r--r--sound/drivers/pcm-indirect2.h140
5 files changed, 2098 insertions, 0 deletions
diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig
index 83529b08d019..75d4fe09fdf3 100644
--- a/sound/drivers/Kconfig
+++ b/sound/drivers/Kconfig
@@ -120,4 +120,16 @@ config SND_PORTMAN2X4
120 To compile this driver as a module, choose M here: the module 120 To compile this driver as a module, choose M here: the module
121 will be called snd-portman2x4. 121 will be called snd-portman2x4.
122 122
123config SND_ML403_AC97CR
124 tristate "Xilinx ML403 AC97 Controller Reference"
125 depends on SND && XILINX_VIRTEX
126 select SND_AC97_CODEC
127 help
128 Say Y here to include support for the
129 opb_ac97_controller_ref_v1_00_a ip core found in Xilinx' ML403
130 reference design.
131
132 To compile this driver as a module, choose M here: the module
133 will be called snd-ml403_ac97cr.
134
123endmenu 135endmenu
diff --git a/sound/drivers/Makefile b/sound/drivers/Makefile
index 80aeff5ccdea..8e5530006e1f 100644
--- a/sound/drivers/Makefile
+++ b/sound/drivers/Makefile
@@ -9,6 +9,7 @@ snd-mts64-objs := mts64.o
9snd-portman2x4-objs := portman2x4.o 9snd-portman2x4-objs := portman2x4.o
10snd-serial-u16550-objs := serial-u16550.o 10snd-serial-u16550-objs := serial-u16550.o
11snd-virmidi-objs := virmidi.o 11snd-virmidi-objs := virmidi.o
12snd-ml403-ac97cr-objs := ml403-ac97cr.o pcm-indirect2.o
12 13
13# Toplevel Module Dependency 14# Toplevel Module Dependency
14obj-$(CONFIG_SND_DUMMY) += snd-dummy.o 15obj-$(CONFIG_SND_DUMMY) += snd-dummy.o
@@ -17,5 +18,6 @@ obj-$(CONFIG_SND_SERIAL_U16550) += snd-serial-u16550.o
17obj-$(CONFIG_SND_MTPAV) += snd-mtpav.o 18obj-$(CONFIG_SND_MTPAV) += snd-mtpav.o
18obj-$(CONFIG_SND_MTS64) += snd-mts64.o 19obj-$(CONFIG_SND_MTS64) += snd-mts64.o
19obj-$(CONFIG_SND_PORTMAN2X4) += snd-portman2x4.o 20obj-$(CONFIG_SND_PORTMAN2X4) += snd-portman2x4.o
21obj-$(CONFIG_SND_ML403_AC97CR) += snd-ml403-ac97cr.o
20 22
21obj-$(CONFIG_SND) += opl3/ opl4/ mpu401/ vx/ 23obj-$(CONFIG_SND) += opl3/ opl4/ mpu401/ vx/
diff --git a/sound/drivers/ml403-ac97cr.c b/sound/drivers/ml403-ac97cr.c
new file mode 100644
index 000000000000..22223152a347
--- /dev/null
+++ b/sound/drivers/ml403-ac97cr.c
@@ -0,0 +1,1353 @@
1/*
2 * ALSA driver for Xilinx ML403 AC97 Controller Reference
3 * IP: opb_ac97_controller_ref_v1_00_a (EDK 8.1i)
4 * IP: opb_ac97_controller_ref_v1_00_a (EDK 9.1i)
5 *
6 * Copyright (c) by 2007 Joachim Foerster <JOFT@gmx.de>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24/* Some notes / status of this driver:
25 *
26 * - Don't wonder about some strange implementations of things - especially the
27 * (heavy) shadowing of codec registers, with which I tried to reduce read
28 * accesses to a minimum, because after a variable amount of accesses, the AC97
29 * controller doesn't raise the register access finished bit anymore ...
30 *
31 * - Capture support works - basically, but after ~30s (with rates > ~20kHz)
32 * ALSA stops reading captured samples from the intermediate buffer and
33 * therefore a overrun happens - ATM I don't know what's wrong.
34 *
35 * - Playback support seems to be pretty stable - no issues here.
36 */
37
38#include <sound/driver.h>
39#include <linux/init.h>
40#include <linux/moduleparam.h>
41
42#include <linux/platform_device.h>
43
44#include <linux/ioport.h>
45#include <linux/io.h>
46#include <linux/interrupt.h>
47
48/* HZ */
49#include <linux/param.h>
50/* jiffies, time_*() */
51#include <linux/jiffies.h>
52/* schedule_timeout*() */
53#include <linux/sched.h>
54/* spin_lock*() */
55#include <linux/spinlock.h>
56/* struct mutex, mutex_init(), mutex_*lock() */
57#include <linux/mutex.h>
58
59/* snd_printk(), snd_printd() */
60#include <sound/core.h>
61#include <sound/pcm.h>
62#include <sound/pcm_params.h>
63#include <sound/initval.h>
64#include <sound/ac97_codec.h>
65
66#include "pcm-indirect2.h"
67
68
69#define SND_ML403_AC97CR_DRIVER "ml403-ac97cr"
70
71MODULE_AUTHOR("Joachim Foerster <JOFT@gmx.de>");
72MODULE_DESCRIPTION("Xilinx ML403 AC97 Controller Reference");
73MODULE_LICENSE("GPL");
74MODULE_SUPPORTED_DEVICE("{{Xilinx,ML403 AC97 Controller Reference}}");
75
76static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
77static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
78static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
79
80module_param_array(index, int, NULL, 0444);
81MODULE_PARM_DESC(index, "Index value for ML403 AC97 Controller Reference.");
82module_param_array(id, charp, NULL, 0444);
83MODULE_PARM_DESC(id, "ID string for ML403 AC97 Controller Reference.");
84module_param_array(enable, bool, NULL, 0444);
85MODULE_PARM_DESC(enable, "Enable this ML403 AC97 Controller Reference.");
86
87/* Special feature options */
88/*#define CODEC_WRITE_CHECK_RAF*/ /* don't return after a write to a codec
89 * register, while RAF bit is not set
90 */
91/* Debug options for code which may be removed completely in a final version */
92#ifdef CONFIG_SND_DEBUG
93/*#define CODEC_STAT*/ /* turn on some minimal "statistics"
94 * about codec register usage
95 */
96#define SND_PCM_INDIRECT2_STAT /* turn on some "statistics" about the
97 * process of copying bytes from the
98 * intermediate buffer to the hardware
99 * fifo and the other way round
100 */
101#endif
102
103/* Definition of a "level/facility dependent" printk(); may be removed
104 * completely in a final version
105 */
106#undef PDEBUG
107#ifdef CONFIG_SND_DEBUG
108/* "facilities" for PDEBUG */
109#define UNKNOWN (1<<0)
110#define CODEC_SUCCESS (1<<1)
111#define CODEC_FAKE (1<<2)
112#define INIT_INFO (1<<3)
113#define INIT_FAILURE (1<<4)
114#define WORK_INFO (1<<5)
115#define WORK_FAILURE (1<<6)
116
117#define PDEBUG_FACILITIES (UNKNOWN | INIT_FAILURE | WORK_FAILURE)
118
119#define PDEBUG(fac, fmt, args...) do { \
120 if (fac & PDEBUG_FACILITIES) \
121 snd_printd(KERN_DEBUG SND_ML403_AC97CR_DRIVER ": " \
122 fmt, ##args); \
123 } while (0)
124#else
125#define PDEBUG(fac, fmt, args...) /* nothing */
126#endif
127
128
129
130/* Defines for "waits"/timeouts (portions of HZ=250 on arch/ppc by default) */
131#define CODEC_TIMEOUT_ON_INIT 5 /* timeout for checking for codec
132 * readiness (after insmod)
133 */
134#ifndef CODEC_WRITE_CHECK_RAF
135#define CODEC_WAIT_AFTER_WRITE 100 /* general, static wait after a write
136 * access to a codec register, may be
137 * 0 to completely remove wait
138 */
139#else
140#define CODEC_TIMEOUT_AFTER_WRITE 5 /* timeout after a write access to a
141 * codec register, if RAF bit is used
142 */
143#endif
144#define CODEC_TIMEOUT_AFTER_READ 5 /* timeout after a read access to a
145 * codec register (checking RAF bit)
146 */
147
148/* Infrastructure for codec register shadowing */
149#define LM4550_REG_OK (1<<0) /* register exists */
150#define LM4550_REG_DONEREAD (1<<1) /* read register once, value should be
151 * the same currently in the register
152 */
153#define LM4550_REG_NOSAVE (1<<2) /* values written to this register will
154 * not be saved in the register
155 */
156#define LM4550_REG_NOSHADOW (1<<3) /* don't do register shadowing, use plain
157 * hardware access
158 */
159#define LM4550_REG_READONLY (1<<4) /* register is read only */
160#define LM4550_REG_FAKEPROBE (1<<5) /* fake write _and_ read actions during
161 * probe() correctly
162 */
163#define LM4550_REG_FAKEREAD (1<<6) /* fake read access, always return
164 * default value
165 */
166#define LM4550_REG_ALLFAKE (LM4550_REG_FAKEREAD | LM4550_REG_FAKEPROBE)
167
168struct lm4550_reg {
169 u16 value;
170 u16 flag;
171 u16 wmask;
172 u16 def;
173};
174
175struct lm4550_reg lm4550_regfile[64] = {
176 [AC97_RESET / 2] = {.flag = LM4550_REG_OK \
177 | LM4550_REG_NOSAVE \
178 | LM4550_REG_FAKEREAD,
179 .def = 0x0D50},
180 [AC97_MASTER / 2] = {.flag = LM4550_REG_OK
181 | LM4550_REG_FAKEPROBE,
182 .wmask = 0x9F1F,
183 .def = 0x8000},
184 [AC97_HEADPHONE / 2] = {.flag = LM4550_REG_OK \
185 | LM4550_REG_FAKEPROBE,
186 .wmask = 0x9F1F,
187 .def = 0x8000},
188 [AC97_MASTER_MONO / 2] = {.flag = LM4550_REG_OK \
189 | LM4550_REG_FAKEPROBE,
190 .wmask = 0x801F,
191 .def = 0x8000},
192 [AC97_PC_BEEP / 2] = {.flag = LM4550_REG_OK \
193 | LM4550_REG_FAKEPROBE,
194 .wmask = 0x801E,
195 .def = 0x0},
196 [AC97_PHONE / 2] = {.flag = LM4550_REG_OK \
197 | LM4550_REG_FAKEPROBE,
198 .wmask = 0x801F,
199 .def = 0x8008},
200 [AC97_MIC / 2] = {.flag = LM4550_REG_OK \
201 | LM4550_REG_FAKEPROBE,
202 .wmask = 0x805F,
203 .def = 0x8008},
204 [AC97_LINE / 2] = {.flag = LM4550_REG_OK \
205 | LM4550_REG_FAKEPROBE,
206 .wmask = 0x9F1F,
207 .def = 0x8808},
208 [AC97_CD / 2] = {.flag = LM4550_REG_OK \
209 | LM4550_REG_FAKEPROBE,
210 .wmask = 0x9F1F,
211 .def = 0x8808},
212 [AC97_VIDEO / 2] = {.flag = LM4550_REG_OK \
213 | LM4550_REG_FAKEPROBE,
214 .wmask = 0x9F1F,
215 .def = 0x8808},
216 [AC97_AUX / 2] = {.flag = LM4550_REG_OK \
217 | LM4550_REG_FAKEPROBE,
218 .wmask = 0x9F1F,
219 .def = 0x8808},
220 [AC97_PCM / 2] = {.flag = LM4550_REG_OK \
221 | LM4550_REG_FAKEPROBE,
222 .wmask = 0x9F1F,
223 .def = 0x8008},
224 [AC97_REC_SEL / 2] = {.flag = LM4550_REG_OK \
225 | LM4550_REG_FAKEPROBE,
226 .wmask = 0x707,
227 .def = 0x0},
228 [AC97_REC_GAIN / 2] = {.flag = LM4550_REG_OK \
229 | LM4550_REG_FAKEPROBE,
230 .wmask = 0x8F0F,
231 .def = 0x8000},
232 [AC97_GENERAL_PURPOSE / 2] = {.flag = LM4550_REG_OK \
233 | LM4550_REG_FAKEPROBE,
234 .def = 0x0,
235 .wmask = 0xA380},
236 [AC97_3D_CONTROL / 2] = {.flag = LM4550_REG_OK \
237 | LM4550_REG_FAKEREAD \
238 | LM4550_REG_READONLY,
239 .def = 0x0101},
240 [AC97_POWERDOWN / 2] = {.flag = LM4550_REG_OK \
241 | LM4550_REG_NOSHADOW \
242 | LM4550_REG_NOSAVE,
243 .wmask = 0xFF00},
244 /* may not write ones to
245 * REF/ANL/DAC/ADC bits
246 * FIXME: Is this ok?
247 */
248 [AC97_EXTENDED_ID / 2] = {.flag = LM4550_REG_OK \
249 | LM4550_REG_FAKEREAD \
250 | LM4550_REG_READONLY,
251 .def = 0x0201}, /* primary codec */
252 [AC97_EXTENDED_STATUS / 2] = {.flag = LM4550_REG_OK \
253 | LM4550_REG_NOSHADOW \
254 | LM4550_REG_NOSAVE,
255 .wmask = 0x1},
256 [AC97_PCM_FRONT_DAC_RATE / 2] = {.flag = LM4550_REG_OK \
257 | LM4550_REG_FAKEPROBE,
258 .def = 0xBB80,
259 .wmask = 0xFFFF},
260 [AC97_PCM_LR_ADC_RATE / 2] = {.flag = LM4550_REG_OK \
261 | LM4550_REG_FAKEPROBE,
262 .def = 0xBB80,
263 .wmask = 0xFFFF},
264 [AC97_VENDOR_ID1 / 2] = {.flag = LM4550_REG_OK \
265 | LM4550_REG_READONLY \
266 | LM4550_REG_FAKEREAD,
267 .def = 0x4E53},
268 [AC97_VENDOR_ID2 / 2] = {.flag = LM4550_REG_OK \
269 | LM4550_REG_READONLY \
270 | LM4550_REG_FAKEREAD,
271 .def = 0x4350}
272};
273
274#define LM4550_RF_OK(reg) (lm4550_regfile[reg / 2].flag & LM4550_REG_OK)
275
276static void lm4550_regfile_init(void)
277{
278 int i;
279 for (i = 0; i < 64; i++)
280 if (lm4550_regfile[i].flag & LM4550_REG_FAKEPROBE)
281 lm4550_regfile[i].value = lm4550_regfile[i].def;
282}
283
284static void lm4550_regfile_write_values_after_init(struct snd_ac97 *ac97)
285{
286 int i;
287 for (i = 0; i < 64; i++)
288 if ((lm4550_regfile[i].flag & LM4550_REG_FAKEPROBE) &&
289 (lm4550_regfile[i].value != lm4550_regfile[i].def)) {
290 PDEBUG(CODEC_FAKE, "lm4550_regfile_write_values_after_"
291 "init(): reg=0x%x value=0x%x / %d is different "
292 "from def=0x%x / %d\n",
293 i, lm4550_regfile[i].value,
294 lm4550_regfile[i].value, lm4550_regfile[i].def,
295 lm4550_regfile[i].def);
296 snd_ac97_write(ac97, i * 2, lm4550_regfile[i].value);
297 lm4550_regfile[i].flag |= LM4550_REG_DONEREAD;
298 }
299}
300
301
302/* direct registers */
303#define CR_REG(ml403_ac97cr, x) ((ml403_ac97cr)->port + CR_REG_##x)
304
305#define CR_REG_PLAYFIFO 0x00
306#define CR_PLAYDATA(a) ((a) & 0xFFFF)
307
308#define CR_REG_RECFIFO 0x04
309#define CR_RECDATA(a) ((a) & 0xFFFF)
310
311#define CR_REG_STATUS 0x08
312#define CR_RECOVER (1<<7)
313#define CR_PLAYUNDER (1<<6)
314#define CR_CODECREADY (1<<5)
315#define CR_RAF (1<<4)
316#define CR_RECEMPTY (1<<3)
317#define CR_RECFULL (1<<2)
318#define CR_PLAYHALF (1<<1)
319#define CR_PLAYFULL (1<<0)
320
321#define CR_REG_RESETFIFO 0x0C
322#define CR_RECRESET (1<<1)
323#define CR_PLAYRESET (1<<0)
324
325#define CR_REG_CODEC_ADDR 0x10
326/* UG082 says:
327 * #define CR_CODEC_ADDR(a) ((a) << 1)
328 * #define CR_CODEC_READ (1<<0)
329 * #define CR_CODEC_WRITE (0<<0)
330 */
331/* RefDesign example says: */
332#define CR_CODEC_ADDR(a) ((a) << 0)
333#define CR_CODEC_READ (1<<7)
334#define CR_CODEC_WRITE (0<<7)
335
336#define CR_REG_CODEC_DATAREAD 0x14
337#define CR_CODEC_DATAREAD(v) ((v) & 0xFFFF)
338
339#define CR_REG_CODEC_DATAWRITE 0x18
340#define CR_CODEC_DATAWRITE(v) ((v) & 0xFFFF)
341
342#define CR_FIFO_SIZE 32
343
344struct snd_ml403_ac97cr {
345 /* lock for access to (controller) registers */
346 spinlock_t reg_lock;
347 /* mutex for the whole sequence of accesses to (controller) registers
348 * which affect codec registers
349 */
350 struct mutex cdc_mutex;
351
352 int irq; /* for playback */
353 int enable_irq; /* for playback */
354
355 int capture_irq;
356 int enable_capture_irq;
357
358 struct resource *res_port;
359 void *port;
360
361 struct snd_ac97 *ac97;
362 int ac97_fake;
363#ifdef CODEC_STAT
364 int ac97_read;
365 int ac97_write;
366#endif
367
368 struct platform_device *pfdev;
369 struct snd_card *card;
370 struct snd_pcm *pcm;
371 struct snd_pcm_substream *playback_substream;
372 struct snd_pcm_substream *capture_substream;
373
374 struct snd_pcm_indirect2 ind_rec; /* for playback */
375 struct snd_pcm_indirect2 capture_ind2_rec;
376};
377
378static struct snd_pcm_hardware snd_ml403_ac97cr_playback = {
379 .info = (SNDRV_PCM_INFO_MMAP |
380 SNDRV_PCM_INFO_INTERLEAVED |
381 SNDRV_PCM_INFO_MMAP_VALID),
382 .formats = SNDRV_PCM_FMTBIT_S16_BE,
383 .rates = (SNDRV_PCM_RATE_CONTINUOUS |
384 SNDRV_PCM_RATE_8000_48000),
385 .rate_min = 4000,
386 .rate_max = 48000,
387 .channels_min = 2,
388 .channels_max = 2,
389 .buffer_bytes_max = (128*1024),
390 .period_bytes_min = CR_FIFO_SIZE/2,
391 .period_bytes_max = (64*1024),
392 .periods_min = 2,
393 .periods_max = (128*1024)/(CR_FIFO_SIZE/2),
394 .fifo_size = 0,
395};
396
397static struct snd_pcm_hardware snd_ml403_ac97cr_capture = {
398 .info = (SNDRV_PCM_INFO_MMAP |
399 SNDRV_PCM_INFO_INTERLEAVED |
400 SNDRV_PCM_INFO_MMAP_VALID),
401 .formats = SNDRV_PCM_FMTBIT_S16_BE,
402 .rates = (SNDRV_PCM_RATE_CONTINUOUS |
403 SNDRV_PCM_RATE_8000_48000),
404 .rate_min = 4000,
405 .rate_max = 48000,
406 .channels_min = 2,
407 .channels_max = 2,
408 .buffer_bytes_max = (128*1024),
409 .period_bytes_min = CR_FIFO_SIZE/2,
410 .period_bytes_max = (64*1024),
411 .periods_min = 2,
412 .periods_max = (128*1024)/(CR_FIFO_SIZE/2),
413 .fifo_size = 0,
414};
415
416static size_t
417snd_ml403_ac97cr_playback_ind2_zero(struct snd_pcm_substream *substream,
418 struct snd_pcm_indirect2 *rec)
419{
420 struct snd_ml403_ac97cr *ml403_ac97cr;
421 int copied_words = 0;
422 u32 full = 0;
423
424 ml403_ac97cr = snd_pcm_substream_chip(substream);
425
426 spin_lock(&ml403_ac97cr->reg_lock);
427 while ((full = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
428 CR_PLAYFULL)) != CR_PLAYFULL) {
429 out_be32(CR_REG(ml403_ac97cr, PLAYFIFO), 0);
430 copied_words++;
431 }
432 rec->hw_ready = 0;
433 spin_unlock(&ml403_ac97cr->reg_lock);
434
435 return (size_t) (copied_words * 2);
436}
437
438static size_t
439snd_ml403_ac97cr_playback_ind2_copy(struct snd_pcm_substream *substream,
440 struct snd_pcm_indirect2 *rec,
441 size_t bytes)
442{
443 struct snd_ml403_ac97cr *ml403_ac97cr;
444 u16 *src;
445 int copied_words = 0;
446 u32 full = 0;
447
448 ml403_ac97cr = snd_pcm_substream_chip(substream);
449 src = (u16 *)(substream->runtime->dma_area + rec->sw_data);
450
451 spin_lock(&ml403_ac97cr->reg_lock);
452 while (((full = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
453 CR_PLAYFULL)) != CR_PLAYFULL) && (bytes > 1)) {
454 out_be32(CR_REG(ml403_ac97cr, PLAYFIFO),
455 CR_PLAYDATA(src[copied_words]));
456 copied_words++;
457 bytes = bytes - 2;
458 }
459 if (full != CR_PLAYFULL)
460 rec->hw_ready = 1;
461 else
462 rec->hw_ready = 0;
463 spin_unlock(&ml403_ac97cr->reg_lock);
464
465 return (size_t) (copied_words * 2);
466}
467
468static size_t
469snd_ml403_ac97cr_capture_ind2_null(struct snd_pcm_substream *substream,
470 struct snd_pcm_indirect2 *rec)
471{
472 struct snd_ml403_ac97cr *ml403_ac97cr;
473 int copied_words = 0;
474 u32 empty = 0;
475
476 ml403_ac97cr = snd_pcm_substream_chip(substream);
477
478 spin_lock(&ml403_ac97cr->reg_lock);
479 while ((empty = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
480 CR_RECEMPTY)) != CR_RECEMPTY) {
481 volatile u32 trash;
482
483 trash = CR_RECDATA(in_be32(CR_REG(ml403_ac97cr, RECFIFO)));
484 /* Hmmmm, really necessary? Don't want call to in_be32()
485 * to be optimised away!
486 */
487 trash++;
488 copied_words++;
489 }
490 rec->hw_ready = 0;
491 spin_unlock(&ml403_ac97cr->reg_lock);
492
493 return (size_t) (copied_words * 2);
494}
495
496static size_t
497snd_ml403_ac97cr_capture_ind2_copy(struct snd_pcm_substream *substream,
498 struct snd_pcm_indirect2 *rec, size_t bytes)
499{
500 struct snd_ml403_ac97cr *ml403_ac97cr;
501 u16 *dst;
502 int copied_words = 0;
503 u32 empty = 0;
504
505 ml403_ac97cr = snd_pcm_substream_chip(substream);
506 dst = (u16 *)(substream->runtime->dma_area + rec->sw_data);
507
508 spin_lock(&ml403_ac97cr->reg_lock);
509 while (((empty = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
510 CR_RECEMPTY)) != CR_RECEMPTY) && (bytes > 1)) {
511 dst[copied_words] = CR_RECDATA(in_be32(CR_REG(ml403_ac97cr,
512 RECFIFO)));
513 copied_words++;
514 bytes = bytes - 2;
515 }
516 if (empty != CR_RECEMPTY)
517 rec->hw_ready = 1;
518 else
519 rec->hw_ready = 0;
520 spin_unlock(&ml403_ac97cr->reg_lock);
521
522 return (size_t) (copied_words * 2);
523}
524
525static snd_pcm_uframes_t
526snd_ml403_ac97cr_pcm_pointer(struct snd_pcm_substream *substream)
527{
528 struct snd_ml403_ac97cr *ml403_ac97cr;
529 struct snd_pcm_indirect2 *ind2_rec = NULL;
530
531 ml403_ac97cr = snd_pcm_substream_chip(substream);
532
533 if (substream == ml403_ac97cr->playback_substream)
534 ind2_rec = &ml403_ac97cr->ind_rec;
535 if (substream == ml403_ac97cr->capture_substream)
536 ind2_rec = &ml403_ac97cr->capture_ind2_rec;
537
538 if (ind2_rec != NULL)
539 return snd_pcm_indirect2_pointer(substream, ind2_rec);
540 return (snd_pcm_uframes_t) 0;
541}
542
543static int
544snd_ml403_ac97cr_pcm_playback_trigger(struct snd_pcm_substream *substream,
545 int cmd)
546{
547 struct snd_ml403_ac97cr *ml403_ac97cr;
548 int err = 0;
549
550 ml403_ac97cr = snd_pcm_substream_chip(substream);
551
552 switch (cmd) {
553 case SNDRV_PCM_TRIGGER_START:
554 PDEBUG(WORK_INFO, "trigger(playback): START\n");
555 ml403_ac97cr->ind_rec.hw_ready = 1;
556
557 /* clear play FIFO */
558 out_be32(CR_REG(ml403_ac97cr, RESETFIFO), CR_PLAYRESET);
559
560 /* enable play irq */
561 ml403_ac97cr->enable_irq = 1;
562 enable_irq(ml403_ac97cr->irq);
563 break;
564 case SNDRV_PCM_TRIGGER_STOP:
565 PDEBUG(WORK_INFO, "trigger(playback): STOP\n");
566 ml403_ac97cr->ind_rec.hw_ready = 0;
567#ifdef SND_PCM_INDIRECT2_STAT
568 snd_pcm_indirect2_stat(substream, &ml403_ac97cr->ind_rec);
569#endif
570 /* disable play irq */
571 disable_irq_nosync(ml403_ac97cr->irq);
572 ml403_ac97cr->enable_irq = 0;
573 break;
574 default:
575 err = -EINVAL;
576 break;
577 }
578 PDEBUG(WORK_INFO, "trigger(playback): (done)\n");
579 return err;
580}
581
582static int
583snd_ml403_ac97cr_pcm_capture_trigger(struct snd_pcm_substream *substream,
584 int cmd)
585{
586 struct snd_ml403_ac97cr *ml403_ac97cr;
587 int err = 0;
588
589 ml403_ac97cr = snd_pcm_substream_chip(substream);
590
591 switch (cmd) {
592 case SNDRV_PCM_TRIGGER_START:
593 PDEBUG(WORK_INFO, "trigger(capture): START\n");
594 ml403_ac97cr->capture_ind2_rec.hw_ready = 0;
595
596 /* clear record FIFO */
597 out_be32(CR_REG(ml403_ac97cr, RESETFIFO), CR_RECRESET);
598
599 /* enable record irq */
600 ml403_ac97cr->enable_capture_irq = 1;
601 enable_irq(ml403_ac97cr->capture_irq);
602 break;
603 case SNDRV_PCM_TRIGGER_STOP:
604 PDEBUG(WORK_INFO, "trigger(capture): STOP\n");
605 ml403_ac97cr->capture_ind2_rec.hw_ready = 0;
606#ifdef SND_PCM_INDIRECT2_STAT
607 snd_pcm_indirect2_stat(substream,
608 &ml403_ac97cr->capture_ind2_rec);
609#endif
610 /* disable capture irq */
611 disable_irq_nosync(ml403_ac97cr->capture_irq);
612 ml403_ac97cr->enable_capture_irq = 0;
613 break;
614 default:
615 err = -EINVAL;
616 break;
617 }
618 PDEBUG(WORK_INFO, "trigger(capture): (done)\n");
619 return err;
620}
621
622static int
623snd_ml403_ac97cr_pcm_playback_prepare(struct snd_pcm_substream *substream)
624{
625 struct snd_ml403_ac97cr *ml403_ac97cr;
626 struct snd_pcm_runtime *runtime;
627
628 ml403_ac97cr = snd_pcm_substream_chip(substream);
629 runtime = substream->runtime;
630
631 PDEBUG(WORK_INFO,
632 "prepare(): period_bytes=%d, minperiod_bytes=%d\n",
633 snd_pcm_lib_period_bytes(substream), CR_FIFO_SIZE / 2);
634
635 /* set sampling rate */
636 snd_ac97_set_rate(ml403_ac97cr->ac97, AC97_PCM_FRONT_DAC_RATE,
637 runtime->rate);
638 PDEBUG(WORK_INFO, "prepare(): rate=%d\n", runtime->rate);
639
640 /* init struct for intermediate buffer */
641 memset(&ml403_ac97cr->ind_rec, 0,
642 sizeof(struct snd_pcm_indirect2));
643 ml403_ac97cr->ind_rec.hw_buffer_size = CR_FIFO_SIZE;
644 ml403_ac97cr->ind_rec.sw_buffer_size =
645 snd_pcm_lib_buffer_bytes(substream);
646 ml403_ac97cr->ind_rec.min_periods = -1;
647 ml403_ac97cr->ind_rec.min_multiple =
648 snd_pcm_lib_period_bytes(substream) / (CR_FIFO_SIZE / 2);
649 PDEBUG(WORK_INFO, "prepare(): hw_buffer_size=%d, "
650 "sw_buffer_size=%d, min_multiple=%d\n",
651 CR_FIFO_SIZE, ml403_ac97cr->ind_rec.sw_buffer_size,
652 ml403_ac97cr->ind_rec.min_multiple);
653 return 0;
654}
655
656static int
657snd_ml403_ac97cr_pcm_capture_prepare(struct snd_pcm_substream *substream)
658{
659 struct snd_ml403_ac97cr *ml403_ac97cr;
660 struct snd_pcm_runtime *runtime;
661
662 ml403_ac97cr = snd_pcm_substream_chip(substream);
663 runtime = substream->runtime;
664
665 PDEBUG(WORK_INFO,
666 "prepare(capture): period_bytes=%d, minperiod_bytes=%d\n",
667 snd_pcm_lib_period_bytes(substream), CR_FIFO_SIZE / 2);
668
669 /* set sampling rate */
670 snd_ac97_set_rate(ml403_ac97cr->ac97, AC97_PCM_LR_ADC_RATE,
671 runtime->rate);
672 PDEBUG(WORK_INFO, "prepare(capture): rate=%d\n", runtime->rate);
673
674 /* init struct for intermediate buffer */
675 memset(&ml403_ac97cr->capture_ind2_rec, 0,
676 sizeof(struct snd_pcm_indirect2));
677 ml403_ac97cr->capture_ind2_rec.hw_buffer_size = CR_FIFO_SIZE;
678 ml403_ac97cr->capture_ind2_rec.sw_buffer_size =
679 snd_pcm_lib_buffer_bytes(substream);
680 ml403_ac97cr->capture_ind2_rec.min_multiple =
681 snd_pcm_lib_period_bytes(substream) / (CR_FIFO_SIZE / 2);
682 PDEBUG(WORK_INFO, "prepare(capture): hw_buffer_size=%d, "
683 "sw_buffer_size=%d, min_multiple=%d\n", CR_FIFO_SIZE,
684 ml403_ac97cr->capture_ind2_rec.sw_buffer_size,
685 ml403_ac97cr->capture_ind2_rec.min_multiple);
686 return 0;
687}
688
689static int snd_ml403_ac97cr_hw_free(struct snd_pcm_substream *substream)
690{
691 PDEBUG(WORK_INFO, "hw_free()\n");
692 return snd_pcm_lib_free_pages(substream);
693}
694
695static int
696snd_ml403_ac97cr_hw_params(struct snd_pcm_substream *substream,
697 struct snd_pcm_hw_params *hw_params)
698{
699 PDEBUG(WORK_INFO, "hw_params(): desired buffer bytes=%d, desired "
700 "period bytes=%d\n",
701 params_buffer_bytes(hw_params), params_period_bytes(hw_params));
702 return snd_pcm_lib_malloc_pages(substream,
703 params_buffer_bytes(hw_params));
704}
705
706static int snd_ml403_ac97cr_playback_open(struct snd_pcm_substream *substream)
707{
708 struct snd_ml403_ac97cr *ml403_ac97cr;
709 struct snd_pcm_runtime *runtime;
710
711 ml403_ac97cr = snd_pcm_substream_chip(substream);
712 runtime = substream->runtime;
713
714 PDEBUG(WORK_INFO, "open(playback)\n");
715 ml403_ac97cr->playback_substream = substream;
716 runtime->hw = snd_ml403_ac97cr_playback;
717
718 snd_pcm_hw_constraint_step(runtime, 0,
719 SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
720 CR_FIFO_SIZE / 2);
721 return 0;
722}
723
724static int snd_ml403_ac97cr_capture_open(struct snd_pcm_substream *substream)
725{
726 struct snd_ml403_ac97cr *ml403_ac97cr;
727 struct snd_pcm_runtime *runtime;
728
729 ml403_ac97cr = snd_pcm_substream_chip(substream);
730 runtime = substream->runtime;
731
732 PDEBUG(WORK_INFO, "open(capture)\n");
733 ml403_ac97cr->capture_substream = substream;
734 runtime->hw = snd_ml403_ac97cr_capture;
735
736 snd_pcm_hw_constraint_step(runtime, 0,
737 SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
738 CR_FIFO_SIZE / 2);
739 return 0;
740}
741
742static int snd_ml403_ac97cr_playback_close(struct snd_pcm_substream *substream)
743{
744 struct snd_ml403_ac97cr *ml403_ac97cr;
745
746 ml403_ac97cr = snd_pcm_substream_chip(substream);
747
748 PDEBUG(WORK_INFO, "close(playback)\n");
749 ml403_ac97cr->playback_substream = NULL;
750 return 0;
751}
752
753static int snd_ml403_ac97cr_capture_close(struct snd_pcm_substream *substream)
754{
755 struct snd_ml403_ac97cr *ml403_ac97cr;
756
757 ml403_ac97cr = snd_pcm_substream_chip(substream);
758
759 PDEBUG(WORK_INFO, "close(capture)\n");
760 ml403_ac97cr->capture_substream = NULL;
761 return 0;
762}
763
764static struct snd_pcm_ops snd_ml403_ac97cr_playback_ops = {
765 .open = snd_ml403_ac97cr_playback_open,
766 .close = snd_ml403_ac97cr_playback_close,
767 .ioctl = snd_pcm_lib_ioctl,
768 .hw_params = snd_ml403_ac97cr_hw_params,
769 .hw_free = snd_ml403_ac97cr_hw_free,
770 .prepare = snd_ml403_ac97cr_pcm_playback_prepare,
771 .trigger = snd_ml403_ac97cr_pcm_playback_trigger,
772 .pointer = snd_ml403_ac97cr_pcm_pointer,
773};
774
775static struct snd_pcm_ops snd_ml403_ac97cr_capture_ops = {
776 .open = snd_ml403_ac97cr_capture_open,
777 .close = snd_ml403_ac97cr_capture_close,
778 .ioctl = snd_pcm_lib_ioctl,
779 .hw_params = snd_ml403_ac97cr_hw_params,
780 .hw_free = snd_ml403_ac97cr_hw_free,
781 .prepare = snd_ml403_ac97cr_pcm_capture_prepare,
782 .trigger = snd_ml403_ac97cr_pcm_capture_trigger,
783 .pointer = snd_ml403_ac97cr_pcm_pointer,
784};
785
786static irqreturn_t snd_ml403_ac97cr_irq(int irq, void *dev_id)
787{
788 struct snd_ml403_ac97cr *ml403_ac97cr;
789 struct platform_device *pfdev;
790 int cmp_irq;
791
792 ml403_ac97cr = (struct snd_ml403_ac97cr *)dev_id;
793 if (ml403_ac97cr == NULL)
794 return IRQ_NONE;
795
796 pfdev = ml403_ac97cr->pfdev;
797
798 /* playback interrupt */
799 cmp_irq = platform_get_irq(pfdev, 0);
800 if (irq == cmp_irq) {
801 if (ml403_ac97cr->enable_irq)
802 snd_pcm_indirect2_playback_interrupt(
803 ml403_ac97cr->playback_substream,
804 &ml403_ac97cr->ind_rec,
805 snd_ml403_ac97cr_playback_ind2_copy,
806 snd_ml403_ac97cr_playback_ind2_zero);
807 else
808 goto __disable_irq;
809 } else {
810 /* record interrupt */
811 cmp_irq = platform_get_irq(pfdev, 1);
812 if (irq == cmp_irq) {
813 if (ml403_ac97cr->enable_capture_irq)
814 snd_pcm_indirect2_capture_interrupt(
815 ml403_ac97cr->capture_substream,
816 &ml403_ac97cr->capture_ind2_rec,
817 snd_ml403_ac97cr_capture_ind2_copy,
818 snd_ml403_ac97cr_capture_ind2_null);
819 else
820 goto __disable_irq;
821 } else
822 return IRQ_NONE;
823 }
824 return IRQ_HANDLED;
825
826__disable_irq:
827 PDEBUG(INIT_INFO, "irq(): irq %d is meant to be disabled! So, now try "
828 "to disable it _really_!\n", irq);
829 disable_irq_nosync(irq);
830 return IRQ_HANDLED;
831}
832
833static unsigned short
834snd_ml403_ac97cr_codec_read(struct snd_ac97 *ac97, unsigned short reg)
835{
836 struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
837#ifdef CODEC_STAT
838 u32 stat;
839 u32 rafaccess = 0;
840#endif
841 unsigned long end_time;
842 u16 value = 0;
843
844 if (!LM4550_RF_OK(reg)) {
845 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
846 "access to unknown/unused codec register 0x%x "
847 "ignored!\n", reg);
848 return 0;
849 }
850 /* check if we can fake/answer this access from our shadow register */
851 if ((lm4550_regfile[reg / 2].flag &
852 (LM4550_REG_DONEREAD | LM4550_REG_ALLFAKE)) &&
853 !(lm4550_regfile[reg / 2].flag & LM4550_REG_NOSHADOW)) {
854 if (lm4550_regfile[reg / 2].flag & LM4550_REG_FAKEREAD) {
855 PDEBUG(CODEC_FAKE, "codec_read(): faking read from "
856 "reg=0x%x, val=0x%x / %d\n",
857 reg, lm4550_regfile[reg / 2].def,
858 lm4550_regfile[reg / 2].def);
859 return lm4550_regfile[reg / 2].def;
860 } else if ((lm4550_regfile[reg / 2].flag &
861 LM4550_REG_FAKEPROBE) &&
862 ml403_ac97cr->ac97_fake) {
863 PDEBUG(CODEC_FAKE, "codec_read(): faking read from "
864 "reg=0x%x, val=0x%x / %d (probe)\n",
865 reg, lm4550_regfile[reg / 2].value,
866 lm4550_regfile[reg / 2].value);
867 return lm4550_regfile[reg / 2].value;
868 } else {
869#ifdef CODEC_STAT
870 PDEBUG(CODEC_FAKE, "codec_read(): read access "
871 "answered by shadow register 0x%x (value=0x%x "
872 "/ %d) (cw=%d cr=%d)\n",
873 reg, lm4550_regfile[reg / 2].value,
874 lm4550_regfile[reg / 2].value,
875 ml403_ac97cr->ac97_write,
876 ml403_ac97cr->ac97_read);
877#else
878 PDEBUG(CODEC_FAKE, "codec_read(): read access "
879 "answered by shadow register 0x%x (value=0x%x "
880 "/ %d)\n",
881 reg, lm4550_regfile[reg / 2].value,
882 lm4550_regfile[reg / 2].value);
883#endif
884 return lm4550_regfile[reg / 2].value;
885 }
886 }
887 /* if we are here, we _have_ to access the codec really, no faking */
888 if (mutex_lock_interruptible(&ml403_ac97cr->cdc_mutex) != 0)
889 return 0;
890#ifdef CODEC_STAT
891 ml403_ac97cr->ac97_read++;
892#endif
893 spin_lock(&ml403_ac97cr->reg_lock);
894 out_be32(CR_REG(ml403_ac97cr, CODEC_ADDR),
895 CR_CODEC_ADDR(reg) | CR_CODEC_READ);
896 spin_unlock(&ml403_ac97cr->reg_lock);
897 end_time = jiffies + (HZ / CODEC_TIMEOUT_AFTER_READ);
898 do {
899 spin_lock(&ml403_ac97cr->reg_lock);
900#ifdef CODEC_STAT
901 rafaccess++;
902 stat = in_be32(CR_REG(ml403_ac97cr, STATUS));
903 if ((stat & CR_RAF) == CR_RAF) {
904 value = CR_CODEC_DATAREAD(
905 in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
906 PDEBUG(CODEC_SUCCESS, "codec_read(): (done) reg=0x%x, "
907 "value=0x%x / %d (STATUS=0x%x)\n",
908 reg, value, value, stat);
909#else
910 if ((in_be32(CR_REG(ml403_ac97cr, STATUS)) &
911 CR_RAF) == CR_RAF) {
912 value = CR_CODEC_DATAREAD(
913 in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
914 PDEBUG(CODEC_SUCCESS, "codec_read(): (done) "
915 "reg=0x%x, value=0x%x / %d\n",
916 reg, value, value);
917#endif
918 lm4550_regfile[reg / 2].value = value;
919 lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
920 spin_unlock(&ml403_ac97cr->reg_lock);
921 mutex_unlock(&ml403_ac97cr->cdc_mutex);
922 return value;
923 }
924 spin_unlock(&ml403_ac97cr->reg_lock);
925 schedule_timeout_uninterruptible(1);
926 } while (time_after(end_time, jiffies));
927 /* read the DATAREAD register anyway, see comment below */
928 spin_lock(&ml403_ac97cr->reg_lock);
929 value =
930 CR_CODEC_DATAREAD(in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
931 spin_unlock(&ml403_ac97cr->reg_lock);
932#ifdef CODEC_STAT
933 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
934 "timeout while codec read! "
935 "(reg=0x%x, last STATUS=0x%x, DATAREAD=0x%x / %d, %d) "
936 "(cw=%d, cr=%d)\n",
937 reg, stat, value, value, rafaccess,
938 ml403_ac97cr->ac97_write, ml403_ac97cr->ac97_read);
939#else
940 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
941 "timeout while codec read! "
942 "(reg=0x%x, DATAREAD=0x%x / %d)\n",
943 reg, value, value);
944#endif
945 /* BUG: This is PURE speculation! But after _most_ read timeouts the
946 * value in the register is ok!
947 */
948 lm4550_regfile[reg / 2].value = value;
949 lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
950 mutex_unlock(&ml403_ac97cr->cdc_mutex);
951 return value;
952}
953
954static void
955snd_ml403_ac97cr_codec_write(struct snd_ac97 *ac97, unsigned short reg,
956 unsigned short val)
957{
958 struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
959
960#ifdef CODEC_STAT
961 u32 stat;
962 u32 rafaccess = 0;
963#endif
964#ifdef CODEC_WRITE_CHECK_RAF
965 unsigned long end_time;
966#endif
967
968 if (!LM4550_RF_OK(reg)) {
969 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
970 "access to unknown/unused codec register 0x%x "
971 "ignored!\n", reg);
972 return;
973 }
974 if (lm4550_regfile[reg / 2].flag & LM4550_REG_READONLY) {
975 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
976 "write access to read only codec register 0x%x "
977 "ignored!\n", reg);
978 return;
979 }
980 if ((val & lm4550_regfile[reg / 2].wmask) != val) {
981 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
982 "write access to codec register 0x%x "
983 "with bad value 0x%x / %d!\n",
984 reg, val, val);
985 val = val & lm4550_regfile[reg / 2].wmask;
986 }
987 if (((lm4550_regfile[reg / 2].flag & LM4550_REG_FAKEPROBE) &&
988 ml403_ac97cr->ac97_fake) &&
989 !(lm4550_regfile[reg / 2].flag & LM4550_REG_NOSHADOW)) {
990 PDEBUG(CODEC_FAKE, "codec_write(): faking write to reg=0x%x, "
991 "val=0x%x / %d\n", reg, val, val);
992 lm4550_regfile[reg / 2].value = (val &
993 lm4550_regfile[reg / 2].wmask);
994 return;
995 }
996 if (mutex_lock_interruptible(&ml403_ac97cr->cdc_mutex) != 0)
997 return;
998#ifdef CODEC_STAT
999 ml403_ac97cr->ac97_write++;
1000#endif
1001 spin_lock(&ml403_ac97cr->reg_lock);
1002 out_be32(CR_REG(ml403_ac97cr, CODEC_DATAWRITE),
1003 CR_CODEC_DATAWRITE(val));
1004 out_be32(CR_REG(ml403_ac97cr, CODEC_ADDR),
1005 CR_CODEC_ADDR(reg) | CR_CODEC_WRITE);
1006 spin_unlock(&ml403_ac97cr->reg_lock);
1007#ifdef CODEC_WRITE_CHECK_RAF
1008 /* check CR_CODEC_RAF bit to see if write access to register is done;
1009 * loop until bit is set or timeout happens
1010 */
1011 end_time = jiffies + HZ / CODEC_TIMEOUT_AFTER_WRITE;
1012 do {
1013 spin_lock(&ml403_ac97cr->reg_lock);
1014#ifdef CODEC_STAT
1015 rafaccess++;
1016 stat = in_be32(CR_REG(ml403_ac97cr, STATUS))
1017 if ((stat & CR_RAF) == CR_RAF) {
1018#else
1019 if ((in_be32(CR_REG(ml403_ac97cr, STATUS)) &
1020 CR_RAF) == CR_RAF) {
1021#endif
1022 PDEBUG(CODEC_SUCCESS, "codec_write(): (done) "
1023 "reg=0x%x, value=%d / 0x%x\n",
1024 reg, val, val);
1025 if (!(lm4550_regfile[reg / 2].flag &
1026 LM4550_REG_NOSHADOW) &&
1027 !(lm4550_regfile[reg / 2].flag &
1028 LM4550_REG_NOSAVE))
1029 lm4550_regfile[reg / 2].value = val;
1030 lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
1031 spin_unlock(&ml403_ac97cr->reg_lock);
1032 mutex_unlock(&ml403_ac97cr->cdc_mutex);
1033 return;
1034 }
1035 spin_unlock(&ml403_ac97cr->reg_lock);
1036 schedule_timeout_uninterruptible(1);
1037 } while (time_after(end_time, jiffies));
1038#ifdef CODEC_STAT
1039 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
1040 "timeout while codec write "
1041 "(reg=0x%x, val=0x%x / %d, last STATUS=0x%x, %d) "
1042 "(cw=%d, cr=%d)\n",
1043 reg, val, val, stat, rafaccess, ml403_ac97cr->ac97_write,
1044 ml403_ac97cr->ac97_read);
1045#else
1046 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
1047 "timeout while codec write (reg=0x%x, val=0x%x / %d)\n",
1048 reg, val, val);
1049#endif
1050#else /* CODEC_WRITE_CHECK_RAF */
1051#if CODEC_WAIT_AFTER_WRITE > 0
1052 /* officially, in AC97 spec there is no possibility for a AC97
1053 * controller to determine, if write access is done or not - so: How
1054 * is Xilinx able to provide a RAF bit for write access?
1055 * => very strange, thus just don't check RAF bit (compare with
1056 * Xilinx's example app in EDK 8.1i) and wait
1057 */
1058 schedule_timeout_uninterruptible(HZ / CODEC_WAIT_AFTER_WRITE);
1059#endif
1060 PDEBUG(CODEC_SUCCESS, "codec_write(): (done) "
1061 "reg=0x%x, value=%d / 0x%x (no RAF check)\n",
1062 reg, val, val);
1063#endif
1064 mutex_unlock(&ml403_ac97cr->cdc_mutex);
1065 return;
1066}
1067
1068static int __devinit
1069snd_ml403_ac97cr_chip_init(struct snd_ml403_ac97cr *ml403_ac97cr)
1070{
1071 unsigned long end_time;
1072 PDEBUG(INIT_INFO, "chip_init():\n");
1073 end_time = jiffies + HZ / CODEC_TIMEOUT_ON_INIT;
1074 do {
1075 if (in_be32(CR_REG(ml403_ac97cr, STATUS)) & CR_CODECREADY) {
1076 /* clear both hardware FIFOs */
1077 out_be32(CR_REG(ml403_ac97cr, RESETFIFO),
1078 CR_RECRESET | CR_PLAYRESET);
1079 PDEBUG(INIT_INFO, "chip_init(): (done)\n");
1080 return 0;
1081 }
1082 schedule_timeout_uninterruptible(1);
1083 } while (time_after(end_time, jiffies));
1084 snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1085 "timeout while waiting for codec, "
1086 "not ready!\n");
1087 return -EBUSY;
1088}
1089
1090static int snd_ml403_ac97cr_free(struct snd_ml403_ac97cr *ml403_ac97cr)
1091{
1092 PDEBUG(INIT_INFO, "free():\n");
1093 /* irq release */
1094 if (ml403_ac97cr->irq >= 0)
1095 free_irq(ml403_ac97cr->irq, ml403_ac97cr);
1096 if (ml403_ac97cr->capture_irq >= 0)
1097 free_irq(ml403_ac97cr->capture_irq, ml403_ac97cr);
1098 /* give back "port" */
1099 if (ml403_ac97cr->port != NULL)
1100 iounmap(ml403_ac97cr->port);
1101 kfree(ml403_ac97cr);
1102 PDEBUG(INIT_INFO, "free(): (done)\n");
1103 return 0;
1104}
1105
1106static int snd_ml403_ac97cr_dev_free(struct snd_device *snddev)
1107{
1108 struct snd_ml403_ac97cr *ml403_ac97cr = snddev->device_data;
1109 PDEBUG(INIT_INFO, "dev_free():\n");
1110 return snd_ml403_ac97cr_free(ml403_ac97cr);
1111}
1112
1113static int __devinit
1114snd_ml403_ac97cr_create(struct snd_card *card, struct platform_device *pfdev,
1115 struct snd_ml403_ac97cr **rml403_ac97cr)
1116{
1117 struct snd_ml403_ac97cr *ml403_ac97cr;
1118 int err;
1119 static struct snd_device_ops ops = {
1120 .dev_free = snd_ml403_ac97cr_dev_free,
1121 };
1122 struct resource *resource;
1123 int irq;
1124
1125 *rml403_ac97cr = NULL;
1126 ml403_ac97cr = kzalloc(sizeof(*ml403_ac97cr), GFP_KERNEL);
1127 if (ml403_ac97cr == NULL)
1128 return -ENOMEM;
1129 spin_lock_init(&ml403_ac97cr->reg_lock);
1130 mutex_init(&ml403_ac97cr->cdc_mutex);
1131 ml403_ac97cr->card = card;
1132 ml403_ac97cr->pfdev = pfdev;
1133 ml403_ac97cr->irq = -1;
1134 ml403_ac97cr->enable_irq = 0;
1135 ml403_ac97cr->capture_irq = -1;
1136 ml403_ac97cr->enable_capture_irq = 0;
1137 ml403_ac97cr->port = NULL;
1138 ml403_ac97cr->res_port = NULL;
1139
1140 PDEBUG(INIT_INFO, "Trying to reserve resources now ...\n");
1141 resource = platform_get_resource(pfdev, IORESOURCE_MEM, 0);
1142 /* get "port" */
1143 ml403_ac97cr->port = ioremap_nocache(resource->start,
1144 (resource->end) -
1145 (resource->start) + 1);
1146 if (ml403_ac97cr->port == NULL) {
1147 snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1148 "unable to remap memory region (%x to %x)\n",
1149 resource->start, resource->end);
1150 snd_ml403_ac97cr_free(ml403_ac97cr);
1151 return -EBUSY;
1152 }
1153 snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
1154 "remap controller memory region to "
1155 "0x%x done\n", (unsigned int)ml403_ac97cr->port);
1156 /* get irq */
1157 irq = platform_get_irq(pfdev, 0);
1158 if (request_irq(irq, snd_ml403_ac97cr_irq, IRQF_DISABLED,
1159 pfdev->dev.bus_id, (void *)ml403_ac97cr)) {
1160 snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1161 "unable to grab IRQ %d\n",
1162 irq);
1163 snd_ml403_ac97cr_free(ml403_ac97cr);
1164 return -EBUSY;
1165 }
1166 ml403_ac97cr->irq = irq;
1167 snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
1168 "request (playback) irq %d done\n",
1169 ml403_ac97cr->irq);
1170 irq = platform_get_irq(pfdev, 1);
1171 if (request_irq(irq, snd_ml403_ac97cr_irq, IRQF_DISABLED,
1172 pfdev->dev.bus_id, (void *)ml403_ac97cr)) {
1173 snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1174 "unable to grab IRQ %d\n",
1175 irq);
1176 snd_ml403_ac97cr_free(ml403_ac97cr);
1177 return -EBUSY;
1178 }
1179 ml403_ac97cr->capture_irq = irq;
1180 snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
1181 "request (capture) irq %d done\n",
1182 ml403_ac97cr->capture_irq);
1183
1184 err = snd_ml403_ac97cr_chip_init(ml403_ac97cr);
1185 if (err < 0) {
1186 snd_ml403_ac97cr_free(ml403_ac97cr);
1187 return err;
1188 }
1189
1190 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, ml403_ac97cr, &ops);
1191 if (err < 0) {
1192 PDEBUG(INIT_FAILURE, "probe(): snd_device_new() failed!\n");
1193 snd_ml403_ac97cr_free(ml403_ac97cr);
1194 return err;
1195 }
1196
1197 snd_card_set_dev(card, &pfdev->dev);
1198
1199 *rml403_ac97cr = ml403_ac97cr;
1200 return 0;
1201}
1202
1203static void snd_ml403_ac97cr_mixer_free(struct snd_ac97 *ac97)
1204{
1205 struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
1206 PDEBUG(INIT_INFO, "mixer_free():\n");
1207 ml403_ac97cr->ac97 = NULL;
1208 PDEBUG(INIT_INFO, "mixer_free(): (done)\n");
1209}
1210
1211static int __devinit
1212snd_ml403_ac97cr_mixer(struct snd_ml403_ac97cr *ml403_ac97cr)
1213{
1214 struct snd_ac97_bus *bus;
1215 struct snd_ac97_template ac97;
1216 int err;
1217 static struct snd_ac97_bus_ops ops = {
1218 .write = snd_ml403_ac97cr_codec_write,
1219 .read = snd_ml403_ac97cr_codec_read,
1220 };
1221 PDEBUG(INIT_INFO, "mixer():\n");
1222 err = snd_ac97_bus(ml403_ac97cr->card, 0, &ops, NULL, &bus);
1223 if (err < 0)
1224 return err;
1225
1226 memset(&ac97, 0, sizeof(ac97));
1227 ml403_ac97cr->ac97_fake = 1;
1228 lm4550_regfile_init();
1229#ifdef CODEC_STAT
1230 ml403_ac97cr->ac97_read = 0;
1231 ml403_ac97cr->ac97_write = 0;
1232#endif
1233 ac97.private_data = ml403_ac97cr;
1234 ac97.private_free = snd_ml403_ac97cr_mixer_free;
1235 ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM |
1236 AC97_SCAP_NO_SPDIF;
1237 err = snd_ac97_mixer(bus, &ac97, &ml403_ac97cr->ac97);
1238 ml403_ac97cr->ac97_fake = 0;
1239 lm4550_regfile_write_values_after_init(ml403_ac97cr->ac97);
1240 PDEBUG(INIT_INFO, "mixer(): (done) snd_ac97_mixer()=%d\n", err);
1241 return err;
1242}
1243
1244static int __devinit
1245snd_ml403_ac97cr_pcm(struct snd_ml403_ac97cr *ml403_ac97cr, int device,
1246 struct snd_pcm **rpcm)
1247{
1248 struct snd_pcm *pcm;
1249 int err;
1250
1251 if (rpcm)
1252 *rpcm = NULL;
1253 err = snd_pcm_new(ml403_ac97cr->card, "ML403AC97CR/1", device, 1, 1,
1254 &pcm);
1255 if (err < 0)
1256 return err;
1257 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1258 &snd_ml403_ac97cr_playback_ops);
1259 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
1260 &snd_ml403_ac97cr_capture_ops);
1261 pcm->private_data = ml403_ac97cr;
1262 pcm->info_flags = 0;
1263 strcpy(pcm->name, "ML403AC97CR DAC/ADC");
1264 ml403_ac97cr->pcm = pcm;
1265
1266 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
1267 snd_dma_continuous_data(GFP_KERNEL),
1268 64 * 1024,
1269 128 * 1024);
1270 if (rpcm)
1271 *rpcm = pcm;
1272 return 0;
1273}
1274
1275static int __devinit snd_ml403_ac97cr_probe(struct platform_device *pfdev)
1276{
1277 struct snd_card *card;
1278 struct snd_ml403_ac97cr *ml403_ac97cr = NULL;
1279 int err;
1280 int dev = pfdev->id;
1281
1282 if (dev >= SNDRV_CARDS)
1283 return -ENODEV;
1284 if (!enable[dev])
1285 return -ENOENT;
1286
1287 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1288 if (card == NULL)
1289 return -ENOMEM;
1290 err = snd_ml403_ac97cr_create(card, pfdev, &ml403_ac97cr);
1291 if (err < 0) {
1292 PDEBUG(INIT_FAILURE, "probe(): create failed!\n");
1293 snd_card_free(card);
1294 return err;
1295 }
1296 PDEBUG(INIT_INFO, "probe(): create done\n");
1297 card->private_data = ml403_ac97cr;
1298 err = snd_ml403_ac97cr_mixer(ml403_ac97cr);
1299 if (err < 0) {
1300 snd_card_free(card);
1301 return err;
1302 }
1303 PDEBUG(INIT_INFO, "probe(): mixer done\n");
1304 err = snd_ml403_ac97cr_pcm(ml403_ac97cr, 0, NULL);
1305 if (err < 0) {
1306 snd_card_free(card);
1307 return err;
1308 }
1309 PDEBUG(INIT_INFO, "probe(): PCM done\n");
1310 strcpy(card->driver, SND_ML403_AC97CR_DRIVER);
1311 strcpy(card->shortname, "ML403 AC97 Controller Reference");
1312 sprintf(card->longname, "%s %s at 0x%lx, irq %i & %i, device %i",
1313 card->shortname, card->driver,
1314 (unsigned long)ml403_ac97cr->port, ml403_ac97cr->irq,
1315 ml403_ac97cr->capture_irq, dev + 1);
1316
1317 err = snd_card_register(card);
1318 if (err < 0) {
1319 snd_card_free(card);
1320 return err;
1321 }
1322 platform_set_drvdata(pfdev, card);
1323 PDEBUG(INIT_INFO, "probe(): (done)\n");
1324 return 0;
1325}
1326
1327static int snd_ml403_ac97cr_remove(struct platform_device *pfdev)
1328{
1329 snd_card_free(platform_get_drvdata(pfdev));
1330 platform_set_drvdata(pfdev, NULL);
1331 return 0;
1332}
1333
1334static struct platform_driver snd_ml403_ac97cr_driver = {
1335 .probe = snd_ml403_ac97cr_probe,
1336 .remove = snd_ml403_ac97cr_remove,
1337 .driver = {
1338 .name = SND_ML403_AC97CR_DRIVER,
1339 },
1340};
1341
1342static int __init alsa_card_ml403_ac97cr_init(void)
1343{
1344 return platform_driver_register(&snd_ml403_ac97cr_driver);
1345}
1346
1347static void __exit alsa_card_ml403_ac97cr_exit(void)
1348{
1349 platform_driver_unregister(&snd_ml403_ac97cr_driver);
1350}
1351
1352module_init(alsa_card_ml403_ac97cr_init)
1353module_exit(alsa_card_ml403_ac97cr_exit)
diff --git a/sound/drivers/pcm-indirect2.c b/sound/drivers/pcm-indirect2.c
new file mode 100644
index 000000000000..6a829cd03dde
--- /dev/null
+++ b/sound/drivers/pcm-indirect2.c
@@ -0,0 +1,591 @@
1/*
2 * Helper functions for indirect PCM data transfer to a simple FIFO in
3 * hardware (small, no possibility to read "hardware io position",
4 * updating position done by interrupt, ...)
5 *
6 * Copyright (c) by 2007 Joachim Foerster <JOFT@gmx.de>
7 *
8 * Based on "pcm-indirect.h" (alsa-driver-1.0.13) by
9 *
10 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
11 * Jaroslav Kysela <perex@suse.cz>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28/* #dependency of sound/core.h# */
29#include <sound/driver.h>
30/* snd_printk/d() */
31#include <sound/core.h>
32/* struct snd_pcm_substream, struct snd_pcm_runtime, snd_pcm_uframes_t
33 * snd_pcm_period_elapsed() */
34#include <sound/pcm.h>
35
36#include "pcm-indirect2.h"
37
38#ifdef SND_PCM_INDIRECT2_STAT
39/* jiffies */
40#include <linux/jiffies.h>
41
42void snd_pcm_indirect2_stat(struct snd_pcm_substream *substream,
43 struct snd_pcm_indirect2 *rec)
44{
45 struct snd_pcm_runtime *runtime = substream->runtime;
46 int i;
47 int j;
48 int k;
49 int seconds = (rec->lastbytetime - rec->firstbytetime) / HZ;
50
51 snd_printk(KERN_DEBUG "STAT: mul_elapsed: %u, mul_elapsed_real: %d, "
52 "irq_occured: %d\n",
53 rec->mul_elapsed, rec->mul_elapsed_real, rec->irq_occured);
54 snd_printk(KERN_DEBUG "STAT: min_multiple: %d (irqs/period)\n",
55 rec->min_multiple);
56 snd_printk(KERN_DEBUG "STAT: firstbytetime: %lu, lastbytetime: %lu, "
57 "firstzerotime: %lu\n",
58 rec->firstbytetime, rec->lastbytetime, rec->firstzerotime);
59 snd_printk(KERN_DEBUG "STAT: bytes2hw: %u Bytes => (by runtime->rate) "
60 "length: %d s\n",
61 rec->bytes2hw, rec->bytes2hw / 2 / 2 / runtime->rate);
62 snd_printk(KERN_DEBUG "STAT: (by measurement) length: %d => "
63 "rate: %d Bytes/s = %d Frames/s|Hz\n",
64 seconds, rec->bytes2hw / seconds,
65 rec->bytes2hw / 2 / 2 / seconds);
66 snd_printk(KERN_DEBUG
67 "STAT: zeros2hw: %u = %d ms ~ %d * %d zero copies\n",
68 rec->zeros2hw, ((rec->zeros2hw / 2 / 2) * 1000) /
69 runtime->rate,
70 rec->zeros2hw / (rec->hw_buffer_size / 2),
71 (rec->hw_buffer_size / 2));
72 snd_printk(KERN_DEBUG "STAT: pointer_calls: %u, lastdifftime: %u\n",
73 rec->pointer_calls, rec->lastdifftime);
74 snd_printk(KERN_DEBUG "STAT: sw_io: %d, sw_data: %d\n", rec->sw_io,
75 rec->sw_data);
76 snd_printk(KERN_DEBUG "STAT: byte_sizes[]:\n");
77 k = 0;
78 for (j = 0; j < 8; j++) {
79 for (i = j * 8; i < (j + 1) * 8; i++)
80 if (rec->byte_sizes[i] != 0) {
81 snd_printk(KERN_DEBUG "%u: %u",
82 i, rec->byte_sizes[i]);
83 k++;
84 }
85 if (((k % 8) == 0) && (k != 0)) {
86 snd_printk(KERN_DEBUG "\n");
87 k = 0;
88 }
89 }
90 snd_printk(KERN_DEBUG "\n");
91 snd_printk(KERN_DEBUG "STAT: zero_sizes[]:\n");
92 for (j = 0; j < 8; j++) {
93 k = 0;
94 for (i = j * 8; i < (j + 1) * 8; i++)
95 if (rec->zero_sizes[i] != 0)
96 snd_printk(KERN_DEBUG "%u: %u",
97 i, rec->zero_sizes[i]);
98 else
99 k++;
100 if (!k)
101 snd_printk(KERN_DEBUG "\n");
102 }
103 snd_printk(KERN_DEBUG "\n");
104 snd_printk(KERN_DEBUG "STAT: min_adds[]:\n");
105 for (j = 0; j < 8; j++) {
106 if (rec->min_adds[j] != 0)
107 snd_printk(KERN_DEBUG "%u: %u", j, rec->min_adds[j]);
108 }
109 snd_printk(KERN_DEBUG "\n");
110 snd_printk(KERN_DEBUG "STAT: mul_adds[]:\n");
111 for (j = 0; j < 8; j++) {
112 if (rec->mul_adds[j] != 0)
113 snd_printk(KERN_DEBUG "%u: %u", j, rec->mul_adds[j]);
114 }
115 snd_printk(KERN_DEBUG "\n");
116 snd_printk(KERN_DEBUG
117 "STAT: zero_times_saved: %d, zero_times_notsaved: %d\n",
118 rec->zero_times_saved, rec->zero_times_notsaved);
119 /* snd_printk(KERN_DEBUG "STAT: zero_times[]\n");
120 i = 0;
121 for (j = 0; j < 3750; j++) {
122 if (rec->zero_times[j] != 0) {
123 snd_printk(KERN_DEBUG "%u: %u", j, rec->zero_times[j]);
124 i++;
125 }
126 if (((i % 8) == 0) && (i != 0))
127 snd_printk(KERN_DEBUG "\n");
128 }
129 snd_printk(KERN_DEBUG "\n"); */
130 return;
131}
132#endif
133
134/*
135 * _internal_ helper function for playback/capture transfer function
136 */
137static void
138snd_pcm_indirect2_increase_min_periods(struct snd_pcm_substream *substream,
139 struct snd_pcm_indirect2 *rec,
140 int isplay, int iscopy,
141 unsigned int bytes)
142{
143 if (rec->min_periods >= 0) {
144 if (iscopy) {
145 rec->sw_io += bytes;
146 if (rec->sw_io >= rec->sw_buffer_size)
147 rec->sw_io -= rec->sw_buffer_size;
148 } else if (isplay) {
149 /* If application does not write data in multiples of
150 * a period, move sw_data to the next correctly aligned
151 * position, so that sw_io can converge to it (in the
152 * next step).
153 */
154 if (!rec->check_alignment) {
155 if (rec->bytes2hw %
156 snd_pcm_lib_period_bytes(substream)) {
157 unsigned bytes2hw_aligned =
158 (1 +
159 (rec->bytes2hw /
160 snd_pcm_lib_period_bytes
161 (substream))) *
162 snd_pcm_lib_period_bytes
163 (substream);
164 rec->sw_data =
165 bytes2hw_aligned %
166 rec->sw_buffer_size;
167#ifdef SND_PCM_INDIRECT2_STAT
168 snd_printk(KERN_DEBUG
169 "STAT: @re-align: aligned "
170 "bytes2hw to next period "
171 "size boundary: %d "
172 "(instead of %d)\n",
173 bytes2hw_aligned,
174 rec->bytes2hw);
175 snd_printk(KERN_DEBUG
176 "STAT: @re-align: sw_data "
177 "moves to: %d\n",
178 rec->sw_data);
179#endif
180 }
181 rec->check_alignment = 1;
182 }
183 /* We are at the end and are copying zeros into the
184 * fifo.
185 * Now, we have to make sure that sw_io is increased
186 * until the position of sw_data: Filling the fifo with
187 * the first zeros means, the last bytes were played.
188 */
189 if (rec->sw_io != rec->sw_data) {
190 unsigned int diff;
191 if (rec->sw_data > rec->sw_io)
192 diff = rec->sw_data - rec->sw_io;
193 else
194 diff = (rec->sw_buffer_size -
195 rec->sw_io) +
196 rec->sw_data;
197 if (bytes >= diff)
198 rec->sw_io = rec->sw_data;
199 else {
200 rec->sw_io += bytes;
201 if (rec->sw_io >= rec->sw_buffer_size)
202 rec->sw_io -=
203 rec->sw_buffer_size;
204 }
205 }
206 }
207 rec->min_period_count += bytes;
208 if (rec->min_period_count >= (rec->hw_buffer_size / 2)) {
209 rec->min_periods += (rec->min_period_count /
210 (rec->hw_buffer_size / 2));
211#ifdef SND_PCM_INDIRECT2_STAT
212 if ((rec->min_period_count /
213 (rec->hw_buffer_size / 2)) > 7)
214 snd_printk(KERN_DEBUG
215 "STAT: more than 7 (%d) min_adds "
216 "at once - too big to save!\n",
217 (rec->min_period_count /
218 (rec->hw_buffer_size / 2)));
219 else
220 rec->min_adds[(rec->min_period_count /
221 (rec->hw_buffer_size / 2))]++;
222#endif
223 rec->min_period_count = (rec->min_period_count %
224 (rec->hw_buffer_size / 2));
225 }
226 } else if (isplay && iscopy)
227 rec->min_periods = 0;
228}
229
230/*
231 * helper function for playback/capture pointer callback
232 */
233snd_pcm_uframes_t
234snd_pcm_indirect2_pointer(struct snd_pcm_substream *substream,
235 struct snd_pcm_indirect2 *rec)
236{
237#ifdef SND_PCM_INDIRECT2_STAT
238 rec->pointer_calls++;
239#endif
240 return bytes_to_frames(substream->runtime, rec->sw_io);
241}
242
243/*
244 * _internal_ helper function for playback interrupt callback
245 */
246static void
247snd_pcm_indirect2_playback_transfer(struct snd_pcm_substream *substream,
248 struct snd_pcm_indirect2 *rec,
249 snd_pcm_indirect2_copy_t copy,
250 snd_pcm_indirect2_zero_t zero)
251{
252 struct snd_pcm_runtime *runtime = substream->runtime;
253 snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
254
255 /* runtime->control->appl_ptr: position where ALSA will write next time
256 * rec->appl_ptr: position where ALSA was last time
257 * diff: obviously ALSA wrote that much bytes into the intermediate
258 * buffer since we checked last time
259 */
260 snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
261
262 if (diff) {
263#ifdef SND_PCM_INDIRECT2_STAT
264 rec->lastdifftime = jiffies;
265#endif
266 if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
267 diff += runtime->boundary;
268 /* number of bytes "added" by ALSA increases the number of
269 * bytes which are ready to "be transfered to HW"/"played"
270 * Then, set rec->appl_ptr to not count bytes twice next time.
271 */
272 rec->sw_ready += (int)frames_to_bytes(runtime, diff);
273 rec->appl_ptr = appl_ptr;
274 }
275 if (rec->hw_ready && (rec->sw_ready <= 0)) {
276 unsigned int bytes;
277
278#ifdef SND_PCM_INDIRECT2_STAT
279 if (rec->firstzerotime == 0) {
280 rec->firstzerotime = jiffies;
281 snd_printk(KERN_DEBUG
282 "STAT: @firstzerotime: mul_elapsed: %d, "
283 "min_period_count: %d\n",
284 rec->mul_elapsed, rec->min_period_count);
285 snd_printk(KERN_DEBUG
286 "STAT: @firstzerotime: sw_io: %d, "
287 "sw_data: %d, appl_ptr: %u\n",
288 rec->sw_io, rec->sw_data,
289 (unsigned int)appl_ptr);
290 }
291 if ((jiffies - rec->firstzerotime) < 3750) {
292 rec->zero_times[(jiffies - rec->firstzerotime)]++;
293 rec->zero_times_saved++;
294 } else
295 rec->zero_times_notsaved++;
296#endif
297 bytes = zero(substream, rec);
298
299#ifdef SND_PCM_INDIRECT2_STAT
300 rec->zeros2hw += bytes;
301 if (bytes < 64)
302 rec->zero_sizes[bytes]++;
303 else
304 snd_printk(KERN_DEBUG
305 "STAT: %d zero Bytes copied to hardware at "
306 "once - too big to save!\n",
307 bytes);
308#endif
309 snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 0,
310 bytes);
311 return;
312 }
313 while (rec->hw_ready && (rec->sw_ready > 0)) {
314 /* sw_to_end: max. number of bytes that can be read/take from
315 * the current position (sw_data) in _one_ step
316 */
317 unsigned int sw_to_end = rec->sw_buffer_size - rec->sw_data;
318
319 /* bytes: number of bytes we have available (for reading) */
320 unsigned int bytes = rec->sw_ready;
321
322 if (sw_to_end < bytes)
323 bytes = sw_to_end;
324 if (!bytes)
325 break;
326
327#ifdef SND_PCM_INDIRECT2_STAT
328 if (rec->firstbytetime == 0)
329 rec->firstbytetime = jiffies;
330 rec->lastbytetime = jiffies;
331#endif
332 /* copy bytes from intermediate buffer position sw_data to the
333 * HW and return number of bytes actually written
334 * Furthermore, set hw_ready to 0, if the fifo isn't empty
335 * now => more could be transfered to fifo
336 */
337 bytes = copy(substream, rec, bytes);
338 rec->bytes2hw += bytes;
339
340#ifdef SND_PCM_INDIRECT2_STAT
341 if (bytes < 64)
342 rec->byte_sizes[bytes]++;
343 else
344 snd_printk(KERN_DEBUG
345 "STAT: %d Bytes copied to hardware at once "
346 "- too big to save!\n",
347 bytes);
348#endif
349 /* increase sw_data by the number of actually written bytes
350 * (= number of taken bytes from intermediate buffer)
351 */
352 rec->sw_data += bytes;
353 if (rec->sw_data == rec->sw_buffer_size)
354 rec->sw_data = 0;
355 /* now sw_data is the position where ALSA is going to write
356 * in the intermediate buffer next time = position we are going
357 * to read from next time
358 */
359
360 snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 1,
361 bytes);
362
363 /* we read bytes from intermediate buffer, so we need to say
364 * that the number of bytes ready for transfer are decreased
365 * now
366 */
367 rec->sw_ready -= bytes;
368 }
369 return;
370}
371
372/*
373 * helper function for playback interrupt routine
374 */
375void
376snd_pcm_indirect2_playback_interrupt(struct snd_pcm_substream *substream,
377 struct snd_pcm_indirect2 *rec,
378 snd_pcm_indirect2_copy_t copy,
379 snd_pcm_indirect2_zero_t zero)
380{
381#ifdef SND_PCM_INDIRECT2_STAT
382 rec->irq_occured++;
383#endif
384 /* hardware played some bytes, so there is room again (in fifo) */
385 rec->hw_ready = 1;
386
387 /* don't call ack() now, instead call transfer() function directly
388 * (normally called by ack() )
389 */
390 snd_pcm_indirect2_playback_transfer(substream, rec, copy, zero);
391
392 if (rec->min_periods >= rec->min_multiple) {
393#ifdef SND_PCM_INDIRECT2_STAT
394 if ((rec->min_periods / rec->min_multiple) > 7)
395 snd_printk(KERN_DEBUG
396 "STAT: more than 7 (%d) mul_adds - too big "
397 "to save!\n",
398 (rec->min_periods / rec->min_multiple));
399 else
400 rec->mul_adds[(rec->min_periods /
401 rec->min_multiple)]++;
402 rec->mul_elapsed_real += (rec->min_periods /
403 rec->min_multiple);
404 rec->mul_elapsed++;
405#endif
406 rec->min_periods = 0;
407 snd_pcm_period_elapsed(substream);
408 }
409}
410
411/*
412 * _internal_ helper function for capture interrupt callback
413 */
414static void
415snd_pcm_indirect2_capture_transfer(struct snd_pcm_substream *substream,
416 struct snd_pcm_indirect2 *rec,
417 snd_pcm_indirect2_copy_t copy,
418 snd_pcm_indirect2_zero_t null)
419{
420 struct snd_pcm_runtime *runtime = substream->runtime;
421 snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
422 snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
423
424 if (diff) {
425#ifdef SND_PCM_INDIRECT2_STAT
426 rec->lastdifftime = jiffies;
427#endif
428 if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
429 diff += runtime->boundary;
430 rec->sw_ready -= frames_to_bytes(runtime, diff);
431 rec->appl_ptr = appl_ptr;
432 }
433 /* if hardware has something, but the intermediate buffer is full
434 * => skip contents of buffer
435 */
436 if (rec->hw_ready && (rec->sw_ready >= (int)rec->sw_buffer_size)) {
437 unsigned int bytes;
438
439#ifdef SND_PCM_INDIRECT2_STAT
440 if (rec->firstzerotime == 0) {
441 rec->firstzerotime = jiffies;
442 snd_printk(KERN_DEBUG "STAT: (capture) "
443 "@firstzerotime: mul_elapsed: %d, "
444 "min_period_count: %d\n",
445 rec->mul_elapsed, rec->min_period_count);
446 snd_printk(KERN_DEBUG "STAT: (capture) "
447 "@firstzerotime: sw_io: %d, sw_data: %d, "
448 "appl_ptr: %u\n",
449 rec->sw_io, rec->sw_data,
450 (unsigned int)appl_ptr);
451 }
452 if ((jiffies - rec->firstzerotime) < 3750) {
453 rec->zero_times[(jiffies - rec->firstzerotime)]++;
454 rec->zero_times_saved++;
455 } else
456 rec->zero_times_notsaved++;
457#endif
458 bytes = null(substream, rec);
459
460#ifdef SND_PCM_INDIRECT2_STAT
461 rec->zeros2hw += bytes;
462 if (bytes < 64)
463 rec->zero_sizes[bytes]++;
464 else
465 snd_printk(KERN_DEBUG
466 "STAT: (capture) %d zero Bytes copied to "
467 "hardware at once - too big to save!\n",
468 bytes);
469#endif
470 snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 0,
471 bytes);
472 /* report an overrun */
473 rec->sw_io = SNDRV_PCM_POS_XRUN;
474 return;
475 }
476 while (rec->hw_ready && (rec->sw_ready < (int)rec->sw_buffer_size)) {
477 /* sw_to_end: max. number of bytes that we can write to the
478 * intermediate buffer (until it's end)
479 */
480 size_t sw_to_end = rec->sw_buffer_size - rec->sw_data;
481
482 /* bytes: max. number of bytes, which may be copied to the
483 * intermediate buffer without overflow (in _one_ step)
484 */
485 size_t bytes = rec->sw_buffer_size - rec->sw_ready;
486
487 /* limit number of bytes (for transfer) by available room in
488 * the intermediate buffer
489 */
490 if (sw_to_end < bytes)
491 bytes = sw_to_end;
492 if (!bytes)
493 break;
494
495#ifdef SND_PCM_INDIRECT2_STAT
496 if (rec->firstbytetime == 0)
497 rec->firstbytetime = jiffies;
498 rec->lastbytetime = jiffies;
499#endif
500 /* copy bytes from the intermediate buffer (position sw_data)
501 * to the HW at most and return number of bytes actually copied
502 * from HW
503 * Furthermore, set hw_ready to 0, if the fifo is empty now.
504 */
505 bytes = copy(substream, rec, bytes);
506 rec->bytes2hw += bytes;
507
508#ifdef SND_PCM_INDIRECT2_STAT
509 if (bytes < 64)
510 rec->byte_sizes[bytes]++;
511 else
512 snd_printk(KERN_DEBUG
513 "STAT: (capture) %d Bytes copied to "
514 "hardware at once - too big to save!\n",
515 bytes);
516#endif
517 /* increase sw_data by the number of actually copied bytes from
518 * HW
519 */
520 rec->sw_data += bytes;
521 if (rec->sw_data == rec->sw_buffer_size)
522 rec->sw_data = 0;
523
524 snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 1,
525 bytes);
526
527 /* number of bytes in the intermediate buffer, which haven't
528 * been fetched by ALSA yet.
529 */
530 rec->sw_ready += bytes;
531 }
532 return;
533}
534
535/*
536 * helper function for capture interrupt routine
537 */
538void
539snd_pcm_indirect2_capture_interrupt(struct snd_pcm_substream *substream,
540 struct snd_pcm_indirect2 *rec,
541 snd_pcm_indirect2_copy_t copy,
542 snd_pcm_indirect2_zero_t null)
543{
544#ifdef SND_PCM_INDIRECT2_STAT
545 rec->irq_occured++;
546#endif
547 /* hardware recorded some bytes, so there is something to read from the
548 * record fifo:
549 */
550 rec->hw_ready = 1;
551
552 /* don't call ack() now, instead call transfer() function directly
553 * (normally called by ack() )
554 */
555 snd_pcm_indirect2_capture_transfer(substream, rec, copy, null);
556
557 if (rec->min_periods >= rec->min_multiple) {
558
559#ifdef SND_PCM_INDIRECT2_STAT
560 if ((rec->min_periods / rec->min_multiple) > 7)
561 snd_printk(KERN_DEBUG
562 "STAT: more than 7 (%d) mul_adds - "
563 "too big to save!\n",
564 (rec->min_periods / rec->min_multiple));
565 else
566 rec->mul_adds[(rec->min_periods /
567 rec->min_multiple)]++;
568 rec->mul_elapsed_real += (rec->min_periods /
569 rec->min_multiple);
570 rec->mul_elapsed++;
571
572 if (!(rec->mul_elapsed % 4)) {
573 struct snd_pcm_runtime *runtime = substream->runtime;
574 unsigned int appl_ptr =
575 frames_to_bytes(runtime,
576 (unsigned int)runtime->control->
577 appl_ptr) % rec->sw_buffer_size;
578 int diff = rec->sw_data - appl_ptr;
579 if (diff < 0)
580 diff += rec->sw_buffer_size;
581 snd_printk(KERN_DEBUG
582 "STAT: mul_elapsed: %d, sw_data: %u, "
583 "appl_ptr (bytes): %u, diff: %d\n",
584 rec->mul_elapsed, rec->sw_data, appl_ptr,
585 diff);
586 }
587#endif
588 rec->min_periods = 0;
589 snd_pcm_period_elapsed(substream);
590 }
591}
diff --git a/sound/drivers/pcm-indirect2.h b/sound/drivers/pcm-indirect2.h
new file mode 100644
index 000000000000..2ea6e460f348
--- /dev/null
+++ b/sound/drivers/pcm-indirect2.h
@@ -0,0 +1,140 @@
1/*
2 * Helper functions for indirect PCM data transfer to a simple FIFO in
3 * hardware (small, no possibility to read "hardware io position",
4 * updating position done by interrupt, ...)
5 *
6 * Copyright (c) by 2007 Joachim Foerster <JOFT@gmx.de>
7 *
8 * Based on "pcm-indirect.h" (alsa-driver-1.0.13) by
9 *
10 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
11 * Jaroslav Kysela <perex@suse.cz>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28#ifndef __SOUND_PCM_INDIRECT2_H
29#define __SOUND_PCM_INDIRECT2_H
30
31/* struct snd_pcm_substream, struct snd_pcm_runtime, snd_pcm_uframes_t */
32#include <sound/pcm.h>
33
34/* Debug options for code which may be removed completely in a final version */
35#ifdef CONFIG_SND_DEBUG
36#define SND_PCM_INDIRECT2_STAT /* turn on some "statistics" about the
37 * process of copying bytes from the
38 * intermediate buffer to the hardware
39 * fifo and the other way round
40 */
41#endif
42
43struct snd_pcm_indirect2 {
44 unsigned int hw_buffer_size; /* Byte size of hardware buffer */
45 int hw_ready; /* playback: 1 = hw fifo has room left,
46 * 0 = hw fifo is full
47 */
48 unsigned int min_multiple;
49 int min_periods; /* counts number of min. periods until
50 * min_multiple is reached
51 */
52 int min_period_count; /* counts bytes to count number of
53 * min. periods
54 */
55
56 unsigned int sw_buffer_size; /* Byte size of software buffer */
57
58 /* sw_data: position in intermediate buffer, where we will read (or
59 * write) from/to next time (to transfer data to/from HW)
60 */
61 unsigned int sw_data; /* Offset to next dst (or src) in sw
62 * ring buffer
63 */
64 /* easiest case (playback):
65 * sw_data is nearly the same as ~ runtime->control->appl_ptr, with the
66 * exception that sw_data is "behind" by the number if bytes ALSA wrote
67 * to the intermediate buffer last time.
68 * A call to ack() callback synchronizes both indirectly.
69 */
70
71 /* We have no real sw_io pointer here. Usually sw_io is pointing to the
72 * current playback/capture position _inside_ the hardware. Devices
73 * with plain FIFOs often have no possibility to publish this position.
74 * So we say: if sw_data is updated, that means bytes were copied to
75 * the hardware, we increase sw_io by that amount, because there have
76 * to be as much bytes which were played. So sw_io will stay behind
77 * sw_data all the time and has to converge to sw_data at the end of
78 * playback.
79 */
80 unsigned int sw_io; /* Current software pointer in bytes */
81
82 /* sw_ready: number of bytes ALSA copied to the intermediate buffer, so
83 * it represents the number of bytes which wait for transfer to the HW
84 */
85 int sw_ready; /* Bytes ready to be transferred to/from hw */
86
87 /* appl_ptr: last known position of ALSA (where ALSA is going to write
88 * next time into the intermediate buffer
89 */
90 snd_pcm_uframes_t appl_ptr; /* Last seen appl_ptr */
91
92 unsigned int bytes2hw;
93 int check_alignment;
94
95#ifdef SND_PCM_INDIRECT2_STAT
96 unsigned int zeros2hw;
97 unsigned int mul_elapsed;
98 unsigned int mul_elapsed_real;
99 unsigned long firstbytetime;
100 unsigned long lastbytetime;
101 unsigned long firstzerotime;
102 unsigned int byte_sizes[64];
103 unsigned int zero_sizes[64];
104 unsigned int min_adds[8];
105 unsigned int mul_adds[8];
106 unsigned int zero_times[3750]; /* = 15s */
107 unsigned int zero_times_saved;
108 unsigned int zero_times_notsaved;
109 unsigned int irq_occured;
110 unsigned int pointer_calls;
111 unsigned int lastdifftime;
112#endif
113};
114
115typedef size_t (*snd_pcm_indirect2_copy_t) (struct snd_pcm_substream *substream,
116 struct snd_pcm_indirect2 *rec,
117 size_t bytes);
118typedef size_t (*snd_pcm_indirect2_zero_t) (struct snd_pcm_substream *substream,
119 struct snd_pcm_indirect2 *rec);
120
121#ifdef SND_PCM_INDIRECT2_STAT
122void snd_pcm_indirect2_stat(struct snd_pcm_substream *substream,
123 struct snd_pcm_indirect2 *rec);
124#endif
125
126snd_pcm_uframes_t
127snd_pcm_indirect2_pointer(struct snd_pcm_substream *substream,
128 struct snd_pcm_indirect2 *rec);
129void
130snd_pcm_indirect2_playback_interrupt(struct snd_pcm_substream *substream,
131 struct snd_pcm_indirect2 *rec,
132 snd_pcm_indirect2_copy_t copy,
133 snd_pcm_indirect2_zero_t zero);
134void
135snd_pcm_indirect2_capture_interrupt(struct snd_pcm_substream *substream,
136 struct snd_pcm_indirect2 *rec,
137 snd_pcm_indirect2_copy_t copy,
138 snd_pcm_indirect2_zero_t null);
139
140#endif /* __SOUND_PCM_INDIRECT2_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-21 05:56:42 -0500