1 /*****************************************************************************
2 *
3 * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
4 * Jean-Christian Hassler <jhassler@free.fr>
5 *
6 * This file is part of the Audiowerk2 ALSA driver
7 *
8 * The Audiowerk2 ALSA driver is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2.
11 *
12 * The Audiowerk2 ALSA driver is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with the Audiowerk2 ALSA driver; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
20 * USA.
21 *
22 *****************************************************************************/
23
24 #define AW2_SAA7146_M
25
26 #include <linux/init.h>
27 #include <linux/pci.h>
28 #include <linux/interrupt.h>
29 #include <linux/delay.h>
30 #include <linux/io.h>
31 #include <sound/core.h>
32 #include <sound/initval.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35
36 #include "saa7146.h"
37 #include "aw2-saa7146.h"
38
39 #include "aw2-tsl.c"
40
41 #define WRITEREG(value, addr) writel((value), chip->base_addr + (addr))
42 #define READREG(addr) readl(chip->base_addr + (addr))
43
44 static struct snd_aw2_saa7146_cb_param
45 arr_substream_it_playback_cb[NB_STREAM_PLAYBACK];
46 static struct snd_aw2_saa7146_cb_param
47 arr_substream_it_capture_cb[NB_STREAM_CAPTURE];
48
49 static int snd_aw2_saa7146_get_limit(int size);
50
51 /* chip-specific destructor */
snd_aw2_saa7146_free(struct snd_aw2_saa7146 * chip)52 int snd_aw2_saa7146_free(struct snd_aw2_saa7146 *chip)
53 {
54 /* disable all irqs */
55 WRITEREG(0, IER);
56
57 /* reset saa7146 */
58 WRITEREG((MRST_N << 16), MC1);
59
60 /* Unset base addr */
61 chip->base_addr = NULL;
62
63 return 0;
64 }
65
snd_aw2_saa7146_setup(struct snd_aw2_saa7146 * chip,void __iomem * pci_base_addr)66 void snd_aw2_saa7146_setup(struct snd_aw2_saa7146 *chip,
67 void __iomem *pci_base_addr)
68 {
69 /* set PCI burst/threshold
70
71 Burst length definition
72 VALUE BURST LENGTH
73 000 1 Dword
74 001 2 Dwords
75 010 4 Dwords
76 011 8 Dwords
77 100 16 Dwords
78 101 32 Dwords
79 110 64 Dwords
80 111 128 Dwords
81
82 Threshold definition
83 VALUE WRITE MODE READ MODE
84 00 1 Dword of valid data 1 empty Dword
85 01 4 Dwords of valid data 4 empty Dwords
86 10 8 Dwords of valid data 8 empty Dwords
87 11 16 Dwords of valid data 16 empty Dwords */
88
89 unsigned int acon2;
90 unsigned int acon1 = 0;
91 int i;
92
93 /* Set base addr */
94 chip->base_addr = pci_base_addr;
95
96 /* disable all irqs */
97 WRITEREG(0, IER);
98
99 /* reset saa7146 */
100 WRITEREG((MRST_N << 16), MC1);
101
102 /* enable audio interface */
103 #ifdef __BIG_ENDIAN
104 acon1 |= A1_SWAP;
105 acon1 |= A2_SWAP;
106 #endif
107 /* WS0_CTRL, WS0_SYNC: input TSL1, I2S */
108
109 /* At initialization WS1 and WS2 are disabled (configured as input) */
110 acon1 |= 0 * WS1_CTRL;
111 acon1 |= 0 * WS2_CTRL;
112
113 /* WS4 is not used. So it must not restart A2.
114 This is why it is configured as output (force to low) */
115 acon1 |= 3 * WS4_CTRL;
116
117 /* WS3_CTRL, WS3_SYNC: output TSL2, I2S */
118 acon1 |= 2 * WS3_CTRL;
119
120 /* A1 and A2 are active and asynchronous */
121 acon1 |= 3 * AUDIO_MODE;
122 WRITEREG(acon1, ACON1);
123
124 /* The following comes from original windows driver.
125 It is needed to have a correct behavior of input and output
126 simultenously, but I don't know why ! */
127 WRITEREG(3 * (BurstA1_in) + 3 * (ThreshA1_in) +
128 3 * (BurstA1_out) + 3 * (ThreshA1_out) +
129 3 * (BurstA2_out) + 3 * (ThreshA2_out), PCI_BT_A);
130
131 /* enable audio port pins */
132 WRITEREG((EAP << 16) | EAP, MC1);
133
134 /* enable I2C */
135 WRITEREG((EI2C << 16) | EI2C, MC1);
136 /* enable interrupts */
137 WRITEREG(A1_out | A2_out | A1_in | IIC_S | IIC_E, IER);
138
139 /* audio configuration */
140 acon2 = A2_CLKSRC | BCLK1_OEN;
141 WRITEREG(acon2, ACON2);
142
143 /* By default use analog input */
144 snd_aw2_saa7146_use_digital_input(chip, 0);
145
146 /* TSL setup */
147 for (i = 0; i < 8; ++i) {
148 WRITEREG(tsl1[i], TSL1 + (i * 4));
149 WRITEREG(tsl2[i], TSL2 + (i * 4));
150 }
151
152 }
153
snd_aw2_saa7146_pcm_init_playback(struct snd_aw2_saa7146 * chip,int stream_number,unsigned long dma_addr,unsigned long period_size,unsigned long buffer_size)154 void snd_aw2_saa7146_pcm_init_playback(struct snd_aw2_saa7146 *chip,
155 int stream_number,
156 unsigned long dma_addr,
157 unsigned long period_size,
158 unsigned long buffer_size)
159 {
160 unsigned long dw_page, dw_limit;
161
162 /* Configure DMA for substream
163 Configuration informations: ALSA has allocated continuous memory
164 pages. So we don't need to use MMU of saa7146.
165 */
166
167 /* No MMU -> nothing to do with PageA1, we only configure the limit of
168 PageAx_out register */
169 /* Disable MMU */
170 dw_page = (0L << 11);
171
172 /* Configure Limit for DMA access.
173 The limit register defines an address limit, which generates
174 an interrupt if passed by the actual PCI address pointer.
175 '0001' means an interrupt will be generated if the lower
176 6 bits (64 bytes) of the PCI address are zero. '0010'
177 defines a limit of 128 bytes, '0011' one of 256 bytes, and
178 so on up to 1 Mbyte defined by '1111'. This interrupt range
179 can be calculated as follows:
180 Range = 2^(5 + Limit) bytes.
181 */
182 dw_limit = snd_aw2_saa7146_get_limit(period_size);
183 dw_page |= (dw_limit << 4);
184
185 if (stream_number == 0) {
186 WRITEREG(dw_page, PageA2_out);
187
188 /* Base address for DMA transfert. */
189 /* This address has been reserved by ALSA. */
190 /* This is a physical address */
191 WRITEREG(dma_addr, BaseA2_out);
192
193 /* Define upper limit for DMA access */
194 WRITEREG(dma_addr + buffer_size, ProtA2_out);
195
196 } else if (stream_number == 1) {
197 WRITEREG(dw_page, PageA1_out);
198
199 /* Base address for DMA transfert. */
200 /* This address has been reserved by ALSA. */
201 /* This is a physical address */
202 WRITEREG(dma_addr, BaseA1_out);
203
204 /* Define upper limit for DMA access */
205 WRITEREG(dma_addr + buffer_size, ProtA1_out);
206 } else {
207 pr_err("aw2: snd_aw2_saa7146_pcm_init_playback: "
208 "Substream number is not 0 or 1 -> not managed\n");
209 }
210 }
211
snd_aw2_saa7146_pcm_init_capture(struct snd_aw2_saa7146 * chip,int stream_number,unsigned long dma_addr,unsigned long period_size,unsigned long buffer_size)212 void snd_aw2_saa7146_pcm_init_capture(struct snd_aw2_saa7146 *chip,
213 int stream_number, unsigned long dma_addr,
214 unsigned long period_size,
215 unsigned long buffer_size)
216 {
217 unsigned long dw_page, dw_limit;
218
219 /* Configure DMA for substream
220 Configuration informations: ALSA has allocated continuous memory
221 pages. So we don't need to use MMU of saa7146.
222 */
223
224 /* No MMU -> nothing to do with PageA1, we only configure the limit of
225 PageAx_out register */
226 /* Disable MMU */
227 dw_page = (0L << 11);
228
229 /* Configure Limit for DMA access.
230 The limit register defines an address limit, which generates
231 an interrupt if passed by the actual PCI address pointer.
232 '0001' means an interrupt will be generated if the lower
233 6 bits (64 bytes) of the PCI address are zero. '0010'
234 defines a limit of 128 bytes, '0011' one of 256 bytes, and
235 so on up to 1 Mbyte defined by '1111'. This interrupt range
236 can be calculated as follows:
237 Range = 2^(5 + Limit) bytes.
238 */
239 dw_limit = snd_aw2_saa7146_get_limit(period_size);
240 dw_page |= (dw_limit << 4);
241
242 if (stream_number == 0) {
243 WRITEREG(dw_page, PageA1_in);
244
245 /* Base address for DMA transfert. */
246 /* This address has been reserved by ALSA. */
247 /* This is a physical address */
248 WRITEREG(dma_addr, BaseA1_in);
249
250 /* Define upper limit for DMA access */
251 WRITEREG(dma_addr + buffer_size, ProtA1_in);
252 } else {
253 pr_err("aw2: snd_aw2_saa7146_pcm_init_capture: "
254 "Substream number is not 0 -> not managed\n");
255 }
256 }
257
snd_aw2_saa7146_define_it_playback_callback(unsigned int stream_number,snd_aw2_saa7146_it_cb p_it_callback,void * p_callback_param)258 void snd_aw2_saa7146_define_it_playback_callback(unsigned int stream_number,
259 snd_aw2_saa7146_it_cb
260 p_it_callback,
261 void *p_callback_param)
262 {
263 if (stream_number < NB_STREAM_PLAYBACK) {
264 arr_substream_it_playback_cb[stream_number].p_it_callback =
265 (snd_aw2_saa7146_it_cb) p_it_callback;
266 arr_substream_it_playback_cb[stream_number].p_callback_param =
267 (void *)p_callback_param;
268 }
269 }
270
snd_aw2_saa7146_define_it_capture_callback(unsigned int stream_number,snd_aw2_saa7146_it_cb p_it_callback,void * p_callback_param)271 void snd_aw2_saa7146_define_it_capture_callback(unsigned int stream_number,
272 snd_aw2_saa7146_it_cb
273 p_it_callback,
274 void *p_callback_param)
275 {
276 if (stream_number < NB_STREAM_CAPTURE) {
277 arr_substream_it_capture_cb[stream_number].p_it_callback =
278 (snd_aw2_saa7146_it_cb) p_it_callback;
279 arr_substream_it_capture_cb[stream_number].p_callback_param =
280 (void *)p_callback_param;
281 }
282 }
283
snd_aw2_saa7146_pcm_trigger_start_playback(struct snd_aw2_saa7146 * chip,int stream_number)284 void snd_aw2_saa7146_pcm_trigger_start_playback(struct snd_aw2_saa7146 *chip,
285 int stream_number)
286 {
287 unsigned int acon1 = 0;
288 /* In aw8 driver, dma transfert is always active. It is
289 started and stopped in a larger "space" */
290 acon1 = READREG(ACON1);
291 if (stream_number == 0) {
292 WRITEREG((TR_E_A2_OUT << 16) | TR_E_A2_OUT, MC1);
293
294 /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */
295 acon1 |= 2 * WS2_CTRL;
296 WRITEREG(acon1, ACON1);
297
298 } else if (stream_number == 1) {
299 WRITEREG((TR_E_A1_OUT << 16) | TR_E_A1_OUT, MC1);
300
301 /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */
302 acon1 |= 1 * WS1_CTRL;
303 WRITEREG(acon1, ACON1);
304 }
305 }
306
snd_aw2_saa7146_pcm_trigger_stop_playback(struct snd_aw2_saa7146 * chip,int stream_number)307 void snd_aw2_saa7146_pcm_trigger_stop_playback(struct snd_aw2_saa7146 *chip,
308 int stream_number)
309 {
310 unsigned int acon1 = 0;
311 acon1 = READREG(ACON1);
312 if (stream_number == 0) {
313 /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */
314 acon1 &= ~(3 * WS2_CTRL);
315 WRITEREG(acon1, ACON1);
316
317 WRITEREG((TR_E_A2_OUT << 16), MC1);
318 } else if (stream_number == 1) {
319 /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */
320 acon1 &= ~(3 * WS1_CTRL);
321 WRITEREG(acon1, ACON1);
322
323 WRITEREG((TR_E_A1_OUT << 16), MC1);
324 }
325 }
326
snd_aw2_saa7146_pcm_trigger_start_capture(struct snd_aw2_saa7146 * chip,int stream_number)327 void snd_aw2_saa7146_pcm_trigger_start_capture(struct snd_aw2_saa7146 *chip,
328 int stream_number)
329 {
330 /* In aw8 driver, dma transfert is always active. It is
331 started and stopped in a larger "space" */
332 if (stream_number == 0)
333 WRITEREG((TR_E_A1_IN << 16) | TR_E_A1_IN, MC1);
334 }
335
snd_aw2_saa7146_pcm_trigger_stop_capture(struct snd_aw2_saa7146 * chip,int stream_number)336 void snd_aw2_saa7146_pcm_trigger_stop_capture(struct snd_aw2_saa7146 *chip,
337 int stream_number)
338 {
339 if (stream_number == 0)
340 WRITEREG((TR_E_A1_IN << 16), MC1);
341 }
342
snd_aw2_saa7146_interrupt(int irq,void * dev_id)343 irqreturn_t snd_aw2_saa7146_interrupt(int irq, void *dev_id)
344 {
345 unsigned int isr;
346 unsigned int iicsta;
347 struct snd_aw2_saa7146 *chip = dev_id;
348
349 isr = READREG(ISR);
350 if (!isr)
351 return IRQ_NONE;
352
353 WRITEREG(isr, ISR);
354
355 if (isr & (IIC_S | IIC_E)) {
356 iicsta = READREG(IICSTA);
357 WRITEREG(0x100, IICSTA);
358 }
359
360 if (isr & A1_out) {
361 if (arr_substream_it_playback_cb[1].p_it_callback != NULL) {
362 arr_substream_it_playback_cb[1].
363 p_it_callback(arr_substream_it_playback_cb[1].
364 p_callback_param);
365 }
366 }
367 if (isr & A2_out) {
368 if (arr_substream_it_playback_cb[0].p_it_callback != NULL) {
369 arr_substream_it_playback_cb[0].
370 p_it_callback(arr_substream_it_playback_cb[0].
371 p_callback_param);
372 }
373
374 }
375 if (isr & A1_in) {
376 if (arr_substream_it_capture_cb[0].p_it_callback != NULL) {
377 arr_substream_it_capture_cb[0].
378 p_it_callback(arr_substream_it_capture_cb[0].
379 p_callback_param);
380 }
381 }
382 return IRQ_HANDLED;
383 }
384
snd_aw2_saa7146_get_hw_ptr_playback(struct snd_aw2_saa7146 * chip,int stream_number,unsigned char * start_addr,unsigned int buffer_size)385 unsigned int snd_aw2_saa7146_get_hw_ptr_playback(struct snd_aw2_saa7146 *chip,
386 int stream_number,
387 unsigned char *start_addr,
388 unsigned int buffer_size)
389 {
390 long pci_adp = 0;
391 size_t ptr = 0;
392
393 if (stream_number == 0) {
394 pci_adp = READREG(PCI_ADP3);
395 ptr = pci_adp - (long)start_addr;
396
397 if (ptr == buffer_size)
398 ptr = 0;
399 }
400 if (stream_number == 1) {
401 pci_adp = READREG(PCI_ADP1);
402 ptr = pci_adp - (size_t) start_addr;
403
404 if (ptr == buffer_size)
405 ptr = 0;
406 }
407 return ptr;
408 }
409
snd_aw2_saa7146_get_hw_ptr_capture(struct snd_aw2_saa7146 * chip,int stream_number,unsigned char * start_addr,unsigned int buffer_size)410 unsigned int snd_aw2_saa7146_get_hw_ptr_capture(struct snd_aw2_saa7146 *chip,
411 int stream_number,
412 unsigned char *start_addr,
413 unsigned int buffer_size)
414 {
415 size_t pci_adp = 0;
416 size_t ptr = 0;
417 if (stream_number == 0) {
418 pci_adp = READREG(PCI_ADP2);
419 ptr = pci_adp - (size_t) start_addr;
420
421 if (ptr == buffer_size)
422 ptr = 0;
423 }
424 return ptr;
425 }
426
snd_aw2_saa7146_use_digital_input(struct snd_aw2_saa7146 * chip,int use_digital)427 void snd_aw2_saa7146_use_digital_input(struct snd_aw2_saa7146 *chip,
428 int use_digital)
429 {
430 /* FIXME: switch between analog and digital input does not always work.
431 It can produce a kind of white noise. It seams that received data
432 are inverted sometime (endian inversion). Why ? I don't know, maybe
433 a problem of synchronization... However for the time being I have
434 not found the problem. Workaround: switch again (and again) between
435 digital and analog input until it works. */
436 if (use_digital)
437 WRITEREG(0x40, GPIO_CTRL);
438 else
439 WRITEREG(0x50, GPIO_CTRL);
440 }
441
snd_aw2_saa7146_is_using_digital_input(struct snd_aw2_saa7146 * chip)442 int snd_aw2_saa7146_is_using_digital_input(struct snd_aw2_saa7146 *chip)
443 {
444 unsigned int reg_val = READREG(GPIO_CTRL);
445 if ((reg_val & 0xFF) == 0x40)
446 return 1;
447 else
448 return 0;
449 }
450
451
snd_aw2_saa7146_get_limit(int size)452 static int snd_aw2_saa7146_get_limit(int size)
453 {
454 int limitsize = 32;
455 int limit = 0;
456 while (limitsize < size) {
457 limitsize *= 2;
458 limit++;
459 }
460 return limit;
461 }
462
