1 /*****************************************************************************
3 * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
4 * Jean-Christian Hassler <jhassler@free.fr>
6 * This file is part of the Audiowerk2 ALSA driver
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.
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.
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,
22 *****************************************************************************/
26 #include <linux/init.h>
27 #include <linux/pci.h>
28 #include <linux/slab.h>
29 #include <linux/interrupt.h>
30 #include <linux/delay.h>
31 #include <asm/system.h>
33 #include <sound/core.h>
34 #include <sound/initval.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
39 #include "aw2-saa7146.h"
43 #define WRITEREG(value, addr) writel((value), chip->base_addr + (addr))
44 #define READREG(addr) readl(chip->base_addr + (addr))
46 static struct snd_aw2_saa7146_cb_param
47 arr_substream_it_playback_cb[NB_STREAM_PLAYBACK];
48 static struct snd_aw2_saa7146_cb_param
49 arr_substream_it_capture_cb[NB_STREAM_CAPTURE];
51 static int snd_aw2_saa7146_get_limit(int size);
53 /* chip-specific destructor */
54 int snd_aw2_saa7146_free(struct snd_aw2_saa7146 *chip)
56 /* disable all irqs */
60 WRITEREG((MRST_N << 16), MC1);
63 chip->base_addr = NULL;
68 void snd_aw2_saa7146_setup(struct snd_aw2_saa7146 *chip,
69 void __iomem *pci_base_addr)
71 /* set PCI burst/threshold
73 Burst length definition
85 VALUE WRITE MODE READ MODE
86 00 1 Dword of valid data 1 empty Dword
87 01 4 Dwords of valid data 4 empty Dwords
88 10 8 Dwords of valid data 8 empty Dwords
89 11 16 Dwords of valid data 16 empty Dwords */
92 unsigned int acon1 = 0;
96 chip->base_addr = pci_base_addr;
98 /* disable all irqs */
102 WRITEREG((MRST_N << 16), MC1);
104 /* enable audio interface */
109 /* WS0_CTRL, WS0_SYNC: input TSL1, I2S */
111 /* At initialization WS1 and WS2 are disabled (configured as input) */
112 acon1 |= 0 * WS1_CTRL;
113 acon1 |= 0 * WS2_CTRL;
115 /* WS4 is not used. So it must not restart A2.
116 This is why it is configured as output (force to low) */
117 acon1 |= 3 * WS4_CTRL;
119 /* WS3_CTRL, WS3_SYNC: output TSL2, I2S */
120 acon1 |= 2 * WS3_CTRL;
122 /* A1 and A2 are active and asynchronous */
123 acon1 |= 3 * AUDIO_MODE;
124 WRITEREG(acon1, ACON1);
126 /* The following comes from original windows driver.
127 It is needed to have a correct behavior of input and output
128 simultenously, but I don't know why ! */
129 WRITEREG(3 * (BurstA1_in) + 3 * (ThreshA1_in) +
130 3 * (BurstA1_out) + 3 * (ThreshA1_out) +
131 3 * (BurstA2_out) + 3 * (ThreshA2_out), PCI_BT_A);
133 /* enable audio port pins */
134 WRITEREG((EAP << 16) | EAP, MC1);
137 WRITEREG((EI2C << 16) | EI2C, MC1);
138 /* enable interrupts */
139 WRITEREG(A1_out | A2_out | A1_in | IIC_S | IIC_E, IER);
141 /* audio configuration */
142 acon2 = A2_CLKSRC | BCLK1_OEN;
143 WRITEREG(acon2, ACON2);
145 /* By default use analog input */
146 snd_aw2_saa7146_use_digital_input(chip, 0);
149 for (i = 0; i < 8; ++i) {
150 WRITEREG(tsl1[i], TSL1 + (i * 4));
151 WRITEREG(tsl2[i], TSL2 + (i * 4));
156 void snd_aw2_saa7146_pcm_init_playback(struct snd_aw2_saa7146 *chip,
158 unsigned long dma_addr,
159 unsigned long period_size,
160 unsigned long buffer_size)
162 unsigned long dw_page, dw_limit;
164 /* Configure DMA for substream
165 Configuration informations: ALSA has allocated continuous memory
166 pages. So we don't need to use MMU of saa7146.
169 /* No MMU -> nothing to do with PageA1, we only configure the limit of
170 PageAx_out register */
172 dw_page = (0L << 11);
174 /* Configure Limit for DMA access.
175 The limit register defines an address limit, which generates
176 an interrupt if passed by the actual PCI address pointer.
177 '0001' means an interrupt will be generated if the lower
178 6 bits (64 bytes) of the PCI address are zero. '0010'
179 defines a limit of 128 bytes, '0011' one of 256 bytes, and
180 so on up to 1 Mbyte defined by '1111'. This interrupt range
181 can be calculated as follows:
182 Range = 2^(5 + Limit) bytes.
184 dw_limit = snd_aw2_saa7146_get_limit(period_size);
185 dw_page |= (dw_limit << 4);
187 if (stream_number == 0) {
188 WRITEREG(dw_page, PageA2_out);
190 /* Base address for DMA transfert. */
191 /* This address has been reserved by ALSA. */
192 /* This is a physical address */
193 WRITEREG(dma_addr, BaseA2_out);
195 /* Define upper limit for DMA access */
196 WRITEREG(dma_addr + buffer_size, ProtA2_out);
198 } else if (stream_number == 1) {
199 WRITEREG(dw_page, PageA1_out);
201 /* Base address for DMA transfert. */
202 /* This address has been reserved by ALSA. */
203 /* This is a physical address */
204 WRITEREG(dma_addr, BaseA1_out);
206 /* Define upper limit for DMA access */
207 WRITEREG(dma_addr + buffer_size, ProtA1_out);
210 "aw2: snd_aw2_saa7146_pcm_init_playback: "
211 "Substream number is not 0 or 1 -> not managed\n");
215 void snd_aw2_saa7146_pcm_init_capture(struct snd_aw2_saa7146 *chip,
216 int stream_number, unsigned long dma_addr,
217 unsigned long period_size,
218 unsigned long buffer_size)
220 unsigned long dw_page, dw_limit;
222 /* Configure DMA for substream
223 Configuration informations: ALSA has allocated continuous memory
224 pages. So we don't need to use MMU of saa7146.
227 /* No MMU -> nothing to do with PageA1, we only configure the limit of
228 PageAx_out register */
230 dw_page = (0L << 11);
232 /* Configure Limit for DMA access.
233 The limit register defines an address limit, which generates
234 an interrupt if passed by the actual PCI address pointer.
235 '0001' means an interrupt will be generated if the lower
236 6 bits (64 bytes) of the PCI address are zero. '0010'
237 defines a limit of 128 bytes, '0011' one of 256 bytes, and
238 so on up to 1 Mbyte defined by '1111'. This interrupt range
239 can be calculated as follows:
240 Range = 2^(5 + Limit) bytes.
242 dw_limit = snd_aw2_saa7146_get_limit(period_size);
243 dw_page |= (dw_limit << 4);
245 if (stream_number == 0) {
246 WRITEREG(dw_page, PageA1_in);
248 /* Base address for DMA transfert. */
249 /* This address has been reserved by ALSA. */
250 /* This is a physical address */
251 WRITEREG(dma_addr, BaseA1_in);
253 /* Define upper limit for DMA access */
254 WRITEREG(dma_addr + buffer_size, ProtA1_in);
257 "aw2: snd_aw2_saa7146_pcm_init_capture: "
258 "Substream number is not 0 -> not managed\n");
262 void snd_aw2_saa7146_define_it_playback_callback(unsigned int stream_number,
263 snd_aw2_saa7146_it_cb
265 void *p_callback_param)
267 if (stream_number < NB_STREAM_PLAYBACK) {
268 arr_substream_it_playback_cb[stream_number].p_it_callback =
269 (snd_aw2_saa7146_it_cb) p_it_callback;
270 arr_substream_it_playback_cb[stream_number].p_callback_param =
271 (void *)p_callback_param;
275 void snd_aw2_saa7146_define_it_capture_callback(unsigned int stream_number,
276 snd_aw2_saa7146_it_cb
278 void *p_callback_param)
280 if (stream_number < NB_STREAM_CAPTURE) {
281 arr_substream_it_capture_cb[stream_number].p_it_callback =
282 (snd_aw2_saa7146_it_cb) p_it_callback;
283 arr_substream_it_capture_cb[stream_number].p_callback_param =
284 (void *)p_callback_param;
288 void snd_aw2_saa7146_pcm_trigger_start_playback(struct snd_aw2_saa7146 *chip,
291 unsigned int acon1 = 0;
292 /* In aw8 driver, dma transfert is always active. It is
293 started and stopped in a larger "space" */
294 acon1 = READREG(ACON1);
295 if (stream_number == 0) {
296 WRITEREG((TR_E_A2_OUT << 16) | TR_E_A2_OUT, MC1);
298 /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */
299 acon1 |= 2 * WS2_CTRL;
300 WRITEREG(acon1, ACON1);
302 } else if (stream_number == 1) {
303 WRITEREG((TR_E_A1_OUT << 16) | TR_E_A1_OUT, MC1);
305 /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */
306 acon1 |= 1 * WS1_CTRL;
307 WRITEREG(acon1, ACON1);
311 void snd_aw2_saa7146_pcm_trigger_stop_playback(struct snd_aw2_saa7146 *chip,
314 unsigned int acon1 = 0;
315 acon1 = READREG(ACON1);
316 if (stream_number == 0) {
317 /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */
318 acon1 &= ~(3 * WS2_CTRL);
319 WRITEREG(acon1, ACON1);
321 WRITEREG((TR_E_A2_OUT << 16), MC1);
322 } else if (stream_number == 1) {
323 /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */
324 acon1 &= ~(3 * WS1_CTRL);
325 WRITEREG(acon1, ACON1);
327 WRITEREG((TR_E_A1_OUT << 16), MC1);
331 void snd_aw2_saa7146_pcm_trigger_start_capture(struct snd_aw2_saa7146 *chip,
334 /* In aw8 driver, dma transfert is always active. It is
335 started and stopped in a larger "space" */
336 if (stream_number == 0)
337 WRITEREG((TR_E_A1_IN << 16) | TR_E_A1_IN, MC1);
340 void snd_aw2_saa7146_pcm_trigger_stop_capture(struct snd_aw2_saa7146 *chip,
343 if (stream_number == 0)
344 WRITEREG((TR_E_A1_IN << 16), MC1);
347 irqreturn_t snd_aw2_saa7146_interrupt(int irq, void *dev_id)
351 struct snd_aw2_saa7146 *chip = dev_id;
359 if (isr & (IIC_S | IIC_E)) {
360 iicsta = READREG(IICSTA);
361 WRITEREG(0x100, IICSTA);
365 if (arr_substream_it_playback_cb[1].p_it_callback != NULL) {
366 arr_substream_it_playback_cb[1].
367 p_it_callback(arr_substream_it_playback_cb[1].
372 if (arr_substream_it_playback_cb[0].p_it_callback != NULL) {
373 arr_substream_it_playback_cb[0].
374 p_it_callback(arr_substream_it_playback_cb[0].
380 if (arr_substream_it_capture_cb[0].p_it_callback != NULL) {
381 arr_substream_it_capture_cb[0].
382 p_it_callback(arr_substream_it_capture_cb[0].
389 unsigned int snd_aw2_saa7146_get_hw_ptr_playback(struct snd_aw2_saa7146 *chip,
391 unsigned char *start_addr,
392 unsigned int buffer_size)
397 if (stream_number == 0) {
398 pci_adp = READREG(PCI_ADP3);
399 ptr = pci_adp - (long)start_addr;
401 if (ptr == buffer_size)
404 if (stream_number == 1) {
405 pci_adp = READREG(PCI_ADP1);
406 ptr = pci_adp - (size_t) start_addr;
408 if (ptr == buffer_size)
414 unsigned int snd_aw2_saa7146_get_hw_ptr_capture(struct snd_aw2_saa7146 *chip,
416 unsigned char *start_addr,
417 unsigned int buffer_size)
421 if (stream_number == 0) {
422 pci_adp = READREG(PCI_ADP2);
423 ptr = pci_adp - (size_t) start_addr;
425 if (ptr == buffer_size)
431 void snd_aw2_saa7146_use_digital_input(struct snd_aw2_saa7146 *chip,
434 /* FIXME: switch between analog and digital input does not always work.
435 It can produce a kind of white noise. It seams that received data
436 are inverted sometime (endian inversion). Why ? I don't know, maybe
437 a problem of synchronization... However for the time being I have
438 not found the problem. Workaround: switch again (and again) between
439 digital and analog input until it works. */
441 WRITEREG(0x40, GPIO_CTRL);
443 WRITEREG(0x50, GPIO_CTRL);
446 int snd_aw2_saa7146_is_using_digital_input(struct snd_aw2_saa7146 *chip)
448 unsigned int reg_val = READREG(GPIO_CTRL);
449 if ((reg_val & 0xFF) == 0x40)
456 static int snd_aw2_saa7146_get_limit(int size)
460 while (limitsize < size) {