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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#include <linux/slab.h>
20
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/ac97_codec.h>
24#include <sound/initval.h>
25#include <sound/soc.h>
26
27#include <asm/irq.h>
28#include <asm/portmux.h>
29#include <linux/mutex.h>
30#include <linux/gpio.h>
31
32#include "bf5xx-sport.h"
33#include "bf5xx-ac97.h"
34
35
36
37
38
39
40
41
42
43
44static struct sport_device *ac97_sport_handle;
45
46void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src,
47 size_t count, unsigned int chan_mask)
48{
49 while (count--) {
50 dst->ac97_tag = TAG_VALID;
51 if (chan_mask & SP_FL) {
52 dst->ac97_pcm_r = *src++;
53 dst->ac97_tag |= TAG_PCM_RIGHT;
54 }
55 if (chan_mask & SP_FR) {
56 dst->ac97_pcm_l = *src++;
57 dst->ac97_tag |= TAG_PCM_LEFT;
58
59 }
60#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
61 if (chan_mask & SP_SR) {
62 dst->ac97_sl = *src++;
63 dst->ac97_tag |= TAG_PCM_SL;
64 }
65 if (chan_mask & SP_SL) {
66 dst->ac97_sr = *src++;
67 dst->ac97_tag |= TAG_PCM_SR;
68 }
69 if (chan_mask & SP_LFE) {
70 dst->ac97_lfe = *src++;
71 dst->ac97_tag |= TAG_PCM_LFE;
72 }
73 if (chan_mask & SP_FC) {
74 dst->ac97_center = *src++;
75 dst->ac97_tag |= TAG_PCM_CENTER;
76 }
77#endif
78 dst++;
79 }
80}
81EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
82
83void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst,
84 size_t count)
85{
86 while (count--) {
87 *(dst++) = src->ac97_pcm_l;
88 *(dst++) = src->ac97_pcm_r;
89 src++;
90 }
91}
92EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
93
94static unsigned int sport_tx_curr_frag(struct sport_device *sport)
95{
96 return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
97 sport->tx_fragsize;
98}
99
100static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
101{
102 struct sport_device *sport = ac97_sport_handle;
103 int *cmd_count = sport->private_data;
104 int nextfrag = sport_tx_curr_frag(sport);
105 struct ac97_frame *nextwrite;
106
107 sport_incfrag(sport, &nextfrag, 1);
108
109 nextwrite = (struct ac97_frame *)(sport->tx_buf +
110 nextfrag * sport->tx_fragsize);
111 pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
112 sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
113 nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
114 nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
115 nextwrite[cmd_count[nextfrag]].ac97_data = data;
116 ++cmd_count[nextfrag];
117 pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
118 addr >> 8, data, nextfrag);
119}
120
121static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
122 unsigned short reg)
123{
124 struct sport_device *sport_handle = ac97_sport_handle;
125 struct ac97_frame out_frame[2], in_frame[2];
126
127 pr_debug("%s enter 0x%x\n", __func__, reg);
128
129
130 if (sport_handle->tx_run || sport_handle->rx_run) {
131 pr_err("Could you send a mail to cliff.cai@analog.com "
132 "to report this?\n");
133 return -EFAULT;
134 }
135
136 memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
137 memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
138 out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
139 out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
140 sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
141 (unsigned char *)&in_frame,
142 2 * sizeof(struct ac97_frame));
143 return in_frame[1].ac97_data;
144}
145
146void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
147 unsigned short val)
148{
149 struct sport_device *sport_handle = ac97_sport_handle;
150
151 pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
152
153 if (sport_handle->tx_run) {
154 enqueue_cmd(ac97, (reg << 8), val);
155 enqueue_cmd(ac97, (reg << 8) | 0x8000, 0);
156 } else {
157 struct ac97_frame frame;
158 memset(&frame, 0, sizeof(struct ac97_frame));
159 frame.ac97_tag = TAG_VALID | TAG_CMD;
160 frame.ac97_addr = (reg << 8);
161 frame.ac97_data = val;
162 sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
163 NULL, sizeof(struct ac97_frame));
164 }
165}
166
167static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
168{
169 struct sport_device *sport_handle = ac97_sport_handle;
170 u16 gpio = P_IDENT(sport_handle->pin_req[3]);
171
172 pr_debug("%s enter\n", __func__);
173
174 peripheral_free_list(sport_handle->pin_req);
175 gpio_request(gpio, "bf5xx-ac97");
176 gpio_direction_output(gpio, 1);
177 udelay(2);
178 gpio_set_value(gpio, 0);
179 udelay(1);
180 gpio_free(gpio);
181 peripheral_request_list(sport_handle->pin_req, "soc-audio");
182}
183
184static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
185{
186#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
187 pr_debug("%s enter\n", __func__);
188
189
190 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
191
192 mdelay(1);
193 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
194
195 mdelay(1);
196#else
197 pr_info("%s: Not implemented\n", __func__);
198#endif
199}
200
201struct snd_ac97_bus_ops soc_ac97_ops = {
202 .read = bf5xx_ac97_read,
203 .write = bf5xx_ac97_write,
204 .warm_reset = bf5xx_ac97_warm_reset,
205 .reset = bf5xx_ac97_cold_reset,
206};
207EXPORT_SYMBOL_GPL(soc_ac97_ops);
208
209#ifdef CONFIG_PM
210static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
211{
212 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
213
214 pr_debug("%s : sport %d\n", __func__, dai->id);
215 if (!dai->active)
216 return 0;
217 if (dai->capture_active)
218 sport_rx_stop(sport);
219 if (dai->playback_active)
220 sport_tx_stop(sport);
221 return 0;
222}
223
224static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
225{
226 int ret;
227 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
228
229 pr_debug("%s : sport %d\n", __func__, dai->id);
230 if (!dai->active)
231 return 0;
232
233#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
234 ret = sport_set_multichannel(sport, 16, 0x3FF, 1);
235#else
236 ret = sport_set_multichannel(sport, 16, 0x1F, 1);
237#endif
238 if (ret) {
239 pr_err("SPORT is busy!\n");
240 return -EBUSY;
241 }
242
243 ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1));
244 if (ret) {
245 pr_err("SPORT is busy!\n");
246 return -EBUSY;
247 }
248
249 ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1));
250 if (ret) {
251 pr_err("SPORT is busy!\n");
252 return -EBUSY;
253 }
254
255 return 0;
256}
257
258#else
259#define bf5xx_ac97_suspend NULL
260#define bf5xx_ac97_resume NULL
261#endif
262
263static struct snd_soc_dai_driver bfin_ac97_dai = {
264 .ac97_control = 1,
265 .suspend = bf5xx_ac97_suspend,
266 .resume = bf5xx_ac97_resume,
267 .playback = {
268 .stream_name = "AC97 Playback",
269 .channels_min = 2,
270#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
271 .channels_max = 6,
272#else
273 .channels_max = 2,
274#endif
275 .rates = SNDRV_PCM_RATE_48000,
276 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
277 .capture = {
278 .stream_name = "AC97 Capture",
279 .channels_min = 2,
280 .channels_max = 2,
281 .rates = SNDRV_PCM_RATE_48000,
282 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
283};
284
285static const struct snd_soc_component_driver bfin_ac97_component = {
286 .name = "bfin-ac97",
287};
288
289static int asoc_bfin_ac97_probe(struct platform_device *pdev)
290{
291 struct sport_device *sport_handle;
292 int ret;
293
294#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
295
296 if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
297 pr_err("Failed to request GPIO_%d for reset\n",
298 CONFIG_SND_BF5XX_RESET_GPIO_NUM);
299 ret = -1;
300 goto gpio_err;
301 }
302 gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
303#endif
304
305 sport_handle = sport_init(pdev, 2, sizeof(struct ac97_frame),
306 PAGE_SIZE);
307 if (!sport_handle) {
308 ret = -ENODEV;
309 goto sport_err;
310 }
311
312
313#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
314 ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 1);
315#else
316 ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
317#endif
318 if (ret) {
319 pr_err("SPORT is busy!\n");
320 ret = -EBUSY;
321 goto sport_config_err;
322 }
323
324 ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
325 if (ret) {
326 pr_err("SPORT is busy!\n");
327 ret = -EBUSY;
328 goto sport_config_err;
329 }
330
331 ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
332 if (ret) {
333 pr_err("SPORT is busy!\n");
334 ret = -EBUSY;
335 goto sport_config_err;
336 }
337
338 ret = snd_soc_register_component(&pdev->dev, &bfin_ac97_component,
339 &bfin_ac97_dai, 1);
340 if (ret) {
341 pr_err("Failed to register DAI: %d\n", ret);
342 goto sport_config_err;
343 }
344
345 ac97_sport_handle = sport_handle;
346
347 return 0;
348
349sport_config_err:
350 sport_done(sport_handle);
351sport_err:
352#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
353 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
354gpio_err:
355#endif
356
357 return ret;
358}
359
360static int asoc_bfin_ac97_remove(struct platform_device *pdev)
361{
362 struct sport_device *sport_handle = platform_get_drvdata(pdev);
363
364 snd_soc_unregister_component(&pdev->dev);
365 sport_done(sport_handle);
366#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
367 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
368#endif
369
370 return 0;
371}
372
373static struct platform_driver asoc_bfin_ac97_driver = {
374 .driver = {
375 .name = "bfin-ac97",
376 .owner = THIS_MODULE,
377 },
378
379 .probe = asoc_bfin_ac97_probe,
380 .remove = asoc_bfin_ac97_remove,
381};
382
383module_platform_driver(asoc_bfin_ac97_driver);
384
385MODULE_AUTHOR("Roy Huang");
386MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
387MODULE_LICENSE("GPL");
388
