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-rw-r--r--sound/soc/blackfin/bf5xx-ac97.c407
1 files changed, 407 insertions, 0 deletions
diff --git a/sound/soc/blackfin/bf5xx-ac97.c b/sound/soc/blackfin/bf5xx-ac97.c
new file mode 100644
index 000000000000..c782e311fd56
--- /dev/null
+++ b/sound/soc/blackfin/bf5xx-ac97.c
@@ -0,0 +1,407 @@
1/*
2 * bf5xx-ac97.c -- AC97 support for the ADI blackfin chip.
3 *
4 * Author: Roy Huang
5 * Created: 11th. June 2007
6 * Copyright: Analog Device Inc.
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 version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/interrupt.h>
17#include <linux/wait.h>
18#include <linux/delay.h>
19
20#include <sound/core.h>
21#include <sound/pcm.h>
22#include <sound/ac97_codec.h>
23#include <sound/initval.h>
24#include <sound/soc.h>
25
26#include <asm/irq.h>
27#include <asm/portmux.h>
28#include <linux/mutex.h>
29#include <linux/gpio.h>
30
31#include "bf5xx-sport.h"
32#include "bf5xx-ac97.h"
33
34#if defined(CONFIG_BF54x)
35#define PIN_REQ_SPORT_0 {P_SPORT0_TFS, P_SPORT0_DTPRI, P_SPORT0_TSCLK, \
36 P_SPORT0_RFS, P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0}
37
38#define PIN_REQ_SPORT_1 {P_SPORT1_TFS, P_SPORT1_DTPRI, P_SPORT1_TSCLK, \
39 P_SPORT1_RFS, P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0}
40
41#define PIN_REQ_SPORT_2 {P_SPORT2_TFS, P_SPORT2_DTPRI, P_SPORT2_TSCLK, \
42 P_SPORT2_RFS, P_SPORT2_DRPRI, P_SPORT2_RSCLK, 0}
43
44#define PIN_REQ_SPORT_3 {P_SPORT3_TFS, P_SPORT3_DTPRI, P_SPORT3_TSCLK, \
45 P_SPORT3_RFS, P_SPORT3_DRPRI, P_SPORT3_RSCLK, 0}
46#else
47#define PIN_REQ_SPORT_0 {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS, \
48 P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0}
49
50#define PIN_REQ_SPORT_1 {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, \
51 P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0}
52#endif
53
54static int *cmd_count;
55static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
56
57#if defined(CONFIG_BF54x)
58static struct sport_param sport_params[4] = {
59 {
60 .dma_rx_chan = CH_SPORT0_RX,
61 .dma_tx_chan = CH_SPORT0_TX,
62 .err_irq = IRQ_SPORT0_ERR,
63 .regs = (struct sport_register *)SPORT0_TCR1,
64 },
65 {
66 .dma_rx_chan = CH_SPORT1_RX,
67 .dma_tx_chan = CH_SPORT1_TX,
68 .err_irq = IRQ_SPORT1_ERR,
69 .regs = (struct sport_register *)SPORT1_TCR1,
70 },
71 {
72 .dma_rx_chan = CH_SPORT2_RX,
73 .dma_tx_chan = CH_SPORT2_TX,
74 .err_irq = IRQ_SPORT2_ERR,
75 .regs = (struct sport_register *)SPORT2_TCR1,
76 },
77 {
78 .dma_rx_chan = CH_SPORT3_RX,
79 .dma_tx_chan = CH_SPORT3_TX,
80 .err_irq = IRQ_SPORT3_ERR,
81 .regs = (struct sport_register *)SPORT3_TCR1,
82 }
83};
84#else
85static struct sport_param sport_params[2] = {
86 {
87 .dma_rx_chan = CH_SPORT0_RX,
88 .dma_tx_chan = CH_SPORT0_TX,
89 .err_irq = IRQ_SPORT0_ERROR,
90 .regs = (struct sport_register *)SPORT0_TCR1,
91 },
92 {
93 .dma_rx_chan = CH_SPORT1_RX,
94 .dma_tx_chan = CH_SPORT1_TX,
95 .err_irq = IRQ_SPORT1_ERROR,
96 .regs = (struct sport_register *)SPORT1_TCR1,
97 }
98};
99#endif
100
101void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u32 *src, \
102 size_t count)
103{
104 while (count--) {
105 dst->ac97_tag = TAG_VALID | TAG_PCM;
106 (dst++)->ac97_pcm = *src++;
107 }
108}
109EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
110
111void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u32 *dst, \
112 size_t count)
113{
114 while (count--)
115 *(dst++) = (src++)->ac97_pcm;
116}
117EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
118
119static unsigned int sport_tx_curr_frag(struct sport_device *sport)
120{
121 return sport->tx_curr_frag = sport_curr_offset_tx(sport) / \
122 sport->tx_fragsize;
123}
124
125static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
126{
127 struct sport_device *sport = sport_handle;
128 int nextfrag = sport_tx_curr_frag(sport);
129 struct ac97_frame *nextwrite;
130
131 sport_incfrag(sport, &nextfrag, 1);
132 sport_incfrag(sport, &nextfrag, 1);
133
134 nextwrite = (struct ac97_frame *)(sport->tx_buf + \
135 nextfrag * sport->tx_fragsize);
136 pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
137 sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
138 nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
139 nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
140 nextwrite[cmd_count[nextfrag]].ac97_data = data;
141 ++cmd_count[nextfrag];
142 pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
143 addr >> 8, data, nextfrag);
144}
145
146static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
147 unsigned short reg)
148{
149 struct ac97_frame out_frame[2], in_frame[2];
150
151 pr_debug("%s enter 0x%x\n", __func__, reg);
152
153 /* When dma descriptor is enabled, the register should not be read */
154 if (sport_handle->tx_run || sport_handle->rx_run) {
155 pr_err("Could you send a mail to cliff.cai@analog.com "
156 "to report this?\n");
157 return -EFAULT;
158 }
159
160 memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
161 memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
162 out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
163 out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
164 sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
165 (unsigned char *)&in_frame,
166 2 * sizeof(struct ac97_frame));
167 return in_frame[1].ac97_data;
168}
169
170void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
171 unsigned short val)
172{
173 pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
174
175 if (sport_handle->tx_run) {
176 enqueue_cmd(ac97, (reg << 8), val); /* write */
177 enqueue_cmd(ac97, (reg << 8) | 0x8000, 0); /* read back */
178 } else {
179 struct ac97_frame frame;
180 memset(&frame, 0, sizeof(struct ac97_frame));
181 frame.ac97_tag = TAG_VALID | TAG_CMD;
182 frame.ac97_addr = (reg << 8);
183 frame.ac97_data = val;
184 sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
185 NULL, sizeof(struct ac97_frame));
186 }
187}
188
189static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
190{
191#if defined(CONFIG_BF54x) || defined(CONFIG_BF561) || \
192 (defined(BF537_FAMILY) && (CONFIG_SND_BF5XX_SPORT_NUM == 1))
193
194#define CONCAT(a, b, c) a ## b ## c
195#define BFIN_SPORT_RFS(x) CONCAT(P_SPORT, x, _RFS)
196
197 u16 per = BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM);
198 u16 gpio = P_IDENT(BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM));
199
200 pr_debug("%s enter\n", __func__);
201
202 peripheral_free(per);
203 gpio_request(gpio, "bf5xx-ac97");
204 gpio_direction_output(gpio, 1);
205 udelay(2);
206 gpio_set_value(gpio, 0);
207 udelay(1);
208 gpio_free(gpio);
209 peripheral_request(per, "soc-audio");
210#else
211 pr_info("%s: Not implemented\n", __func__);
212#endif
213}
214
215static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
216{
217#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
218 pr_debug("%s enter\n", __func__);
219
220 /* It is specified for bf548-ezkit */
221 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
222 /* Keep reset pin low for 1 ms */
223 mdelay(1);
224 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
225 /* Wait for bit clock recover */
226 mdelay(1);
227#else
228 pr_info("%s: Not implemented\n", __func__);
229#endif
230}
231
232struct snd_ac97_bus_ops soc_ac97_ops = {
233 .read = bf5xx_ac97_read,
234 .write = bf5xx_ac97_write,
235 .warm_reset = bf5xx_ac97_warm_reset,
236 .reset = bf5xx_ac97_cold_reset,
237};
238EXPORT_SYMBOL_GPL(soc_ac97_ops);
239
240#ifdef CONFIG_PM
241static int bf5xx_ac97_suspend(struct platform_device *pdev,
242 struct snd_soc_dai *dai)
243{
244 struct sport_device *sport =
245 (struct sport_device *)dai->private_data;
246
247 pr_debug("%s : sport %d\n", __func__, dai->id);
248 if (!dai->active)
249 return 0;
250 if (dai->capture.active)
251 sport_rx_stop(sport);
252 if (dai->playback.active)
253 sport_tx_stop(sport);
254 return 0;
255}
256
257static int bf5xx_ac97_resume(struct platform_device *pdev,
258 struct snd_soc_dai *dai)
259{
260 int ret;
261 struct sport_device *sport =
262 (struct sport_device *)dai->private_data;
263
264 pr_debug("%s : sport %d\n", __func__, dai->id);
265 if (!dai->active)
266 return 0;
267
268 ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
269 if (ret) {
270 pr_err("SPORT is busy!\n");
271 return -EBUSY;
272 }
273
274 ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
275 if (ret) {
276 pr_err("SPORT is busy!\n");
277 return -EBUSY;
278 }
279
280 ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
281 if (ret) {
282 pr_err("SPORT is busy!\n");
283 return -EBUSY;
284 }
285
286 if (dai->capture.active)
287 sport_rx_start(sport);
288 if (dai->playback.active)
289 sport_tx_start(sport);
290 return 0;
291}
292
293#else
294#define bf5xx_ac97_suspend NULL
295#define bf5xx_ac97_resume NULL
296#endif
297
298static int bf5xx_ac97_probe(struct platform_device *pdev,
299 struct snd_soc_dai *dai)
300{
301 int ret;
302#if defined(CONFIG_BF54x)
303 u16 sport_req[][7] = {PIN_REQ_SPORT_0, PIN_REQ_SPORT_1,
304 PIN_REQ_SPORT_2, PIN_REQ_SPORT_3};
305#else
306 u16 sport_req[][7] = {PIN_REQ_SPORT_0, PIN_REQ_SPORT_1};
307#endif
308 cmd_count = (int *)get_zeroed_page(GFP_KERNEL);
309 if (cmd_count == NULL)
310 return -ENOMEM;
311
312 if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
313 pr_err("Requesting Peripherals failed\n");
314 return -EFAULT;
315 }
316
317#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
318 /* Request PB3 as reset pin */
319 if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
320 pr_err("Failed to request GPIO_%d for reset\n",
321 CONFIG_SND_BF5XX_RESET_GPIO_NUM);
322 peripheral_free_list(&sport_req[sport_num][0]);
323 return -1;
324 }
325 gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
326#endif
327 sport_handle = sport_init(&sport_params[sport_num], 2, \
328 sizeof(struct ac97_frame), NULL);
329 if (!sport_handle) {
330 peripheral_free_list(&sport_req[sport_num][0]);
331#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
332 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
333#endif
334 return -ENODEV;
335 }
336 /*SPORT works in TDM mode to simulate AC97 transfers*/
337 ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
338 if (ret) {
339 pr_err("SPORT is busy!\n");
340 kfree(sport_handle);
341 peripheral_free_list(&sport_req[sport_num][0]);
342#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
343 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
344#endif
345 return -EBUSY;
346 }
347
348 ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
349 if (ret) {
350 pr_err("SPORT is busy!\n");
351 kfree(sport_handle);
352 peripheral_free_list(&sport_req[sport_num][0]);
353#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
354 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
355#endif
356 return -EBUSY;
357 }
358
359 ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
360 if (ret) {
361 pr_err("SPORT is busy!\n");
362 kfree(sport_handle);
363 peripheral_free_list(&sport_req[sport_num][0]);
364#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
365 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
366#endif
367 return -EBUSY;
368 }
369 return 0;
370}
371
372static void bf5xx_ac97_remove(struct platform_device *pdev,
373 struct snd_soc_dai *dai)
374{
375 free_page((unsigned long)cmd_count);
376 cmd_count = NULL;
377#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
378 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
379#endif
380}
381
382struct snd_soc_dai bfin_ac97_dai = {
383 .name = "bf5xx-ac97",
384 .id = 0,
385 .type = SND_SOC_DAI_AC97,
386 .probe = bf5xx_ac97_probe,
387 .remove = bf5xx_ac97_remove,
388 .suspend = bf5xx_ac97_suspend,
389 .resume = bf5xx_ac97_resume,
390 .playback = {
391 .stream_name = "AC97 Playback",
392 .channels_min = 2,
393 .channels_max = 2,
394 .rates = SNDRV_PCM_RATE_48000,
395 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
396 .capture = {
397 .stream_name = "AC97 Capture",
398 .channels_min = 2,
399 .channels_max = 2,
400 .rates = SNDRV_PCM_RATE_48000,
401 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
402};
403EXPORT_SYMBOL_GPL(bfin_ac97_dai);
404
405MODULE_AUTHOR("Roy Huang");
406MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
407MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 05:53:24 -0500