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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
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
35
36
37
38
39
40
41
42
43static int *cmd_count;
44static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
45
46#define SPORT_REQ(x) \
47 [x] = {P_SPORT##x##_TFS, P_SPORT##x##_DTPRI, P_SPORT##x##_TSCLK, \
48 P_SPORT##x##_RFS, P_SPORT##x##_DRPRI, P_SPORT##x##_RSCLK, 0}
49static u16 sport_req[][7] = {
50#ifdef SPORT0_TCR1
51 SPORT_REQ(0),
52#endif
53#ifdef SPORT1_TCR1
54 SPORT_REQ(1),
55#endif
56#ifdef SPORT2_TCR1
57 SPORT_REQ(2),
58#endif
59#ifdef SPORT3_TCR1
60 SPORT_REQ(3),
61#endif
62};
63
64#define SPORT_PARAMS(x) \
65 [x] = { \
66 .dma_rx_chan = CH_SPORT##x##_RX, \
67 .dma_tx_chan = CH_SPORT##x##_TX, \
68 .err_irq = IRQ_SPORT##x##_ERROR, \
69 .regs = (struct sport_register *)SPORT##x##_TCR1, \
70 }
71static struct sport_param sport_params[4] = {
72#ifdef SPORT0_TCR1
73 SPORT_PARAMS(0),
74#endif
75#ifdef SPORT1_TCR1
76 SPORT_PARAMS(1),
77#endif
78#ifdef SPORT2_TCR1
79 SPORT_PARAMS(2),
80#endif
81#ifdef SPORT3_TCR1
82 SPORT_PARAMS(3),
83#endif
84};
85
86void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src,
87 size_t count, unsigned int chan_mask)
88{
89 while (count--) {
90 dst->ac97_tag = TAG_VALID;
91 if (chan_mask & SP_FL) {
92 dst->ac97_pcm_r = *src++;
93 dst->ac97_tag |= TAG_PCM_RIGHT;
94 }
95 if (chan_mask & SP_FR) {
96 dst->ac97_pcm_l = *src++;
97 dst->ac97_tag |= TAG_PCM_LEFT;
98
99 }
100#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
101 if (chan_mask & SP_SR) {
102 dst->ac97_sl = *src++;
103 dst->ac97_tag |= TAG_PCM_SL;
104 }
105 if (chan_mask & SP_SL) {
106 dst->ac97_sr = *src++;
107 dst->ac97_tag |= TAG_PCM_SR;
108 }
109 if (chan_mask & SP_LFE) {
110 dst->ac97_lfe = *src++;
111 dst->ac97_tag |= TAG_PCM_LFE;
112 }
113 if (chan_mask & SP_FC) {
114 dst->ac97_center = *src++;
115 dst->ac97_tag |= TAG_PCM_CENTER;
116 }
117#endif
118 dst++;
119 }
120}
121EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
122
123void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst,
124 size_t count)
125{
126 while (count--) {
127 *(dst++) = src->ac97_pcm_l;
128 *(dst++) = src->ac97_pcm_r;
129 src++;
130 }
131}
132EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
133
134static unsigned int sport_tx_curr_frag(struct sport_device *sport)
135{
136 return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
137 sport->tx_fragsize;
138}
139
140static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
141{
142 struct sport_device *sport = sport_handle;
143 int nextfrag = sport_tx_curr_frag(sport);
144 struct ac97_frame *nextwrite;
145
146 sport_incfrag(sport, &nextfrag, 1);
147
148 nextwrite = (struct ac97_frame *)(sport->tx_buf +
149 nextfrag * sport->tx_fragsize);
150 pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
151 sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
152 nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
153 nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
154 nextwrite[cmd_count[nextfrag]].ac97_data = data;
155 ++cmd_count[nextfrag];
156 pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
157 addr >> 8, data, nextfrag);
158}
159
160static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
161 unsigned short reg)
162{
163 struct ac97_frame out_frame[2], in_frame[2];
164
165 pr_debug("%s enter 0x%x\n", __func__, reg);
166
167
168 if (sport_handle->tx_run || sport_handle->rx_run) {
169 pr_err("Could you send a mail to cliff.cai@analog.com "
170 "to report this?\n");
171 return -EFAULT;
172 }
173
174 memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
175 memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
176 out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
177 out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
178 sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
179 (unsigned char *)&in_frame,
180 2 * sizeof(struct ac97_frame));
181 return in_frame[1].ac97_data;
182}
183
184void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
185 unsigned short val)
186{
187 pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
188
189 if (sport_handle->tx_run) {
190 enqueue_cmd(ac97, (reg << 8), val);
191 enqueue_cmd(ac97, (reg << 8) | 0x8000, 0);
192 } else {
193 struct ac97_frame frame;
194 memset(&frame, 0, sizeof(struct ac97_frame));
195 frame.ac97_tag = TAG_VALID | TAG_CMD;
196 frame.ac97_addr = (reg << 8);
197 frame.ac97_data = val;
198 sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
199 NULL, sizeof(struct ac97_frame));
200 }
201}
202
203static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
204{
205#if defined(CONFIG_BF54x) || defined(CONFIG_BF561) || \
206 (defined(BF537_FAMILY) && (CONFIG_SND_BF5XX_SPORT_NUM == 1))
207
208#define CONCAT(a, b, c) a ## b ## c
209#define BFIN_SPORT_RFS(x) CONCAT(P_SPORT, x, _RFS)
210
211 u16 per = BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM);
212 u16 gpio = P_IDENT(BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM));
213
214 pr_debug("%s enter\n", __func__);
215
216 peripheral_free(per);
217 gpio_request(gpio, "bf5xx-ac97");
218 gpio_direction_output(gpio, 1);
219 udelay(2);
220 gpio_set_value(gpio, 0);
221 udelay(1);
222 gpio_free(gpio);
223 peripheral_request(per, "soc-audio");
224#else
225 pr_info("%s: Not implemented\n", __func__);
226#endif
227}
228
229static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
230{
231#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
232 pr_debug("%s enter\n", __func__);
233
234
235 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
236
237 mdelay(1);
238 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
239
240 mdelay(1);
241#else
242 pr_info("%s: Not implemented\n", __func__);
243#endif
244}
245
246struct snd_ac97_bus_ops soc_ac97_ops = {
247 .read = bf5xx_ac97_read,
248 .write = bf5xx_ac97_write,
249 .warm_reset = bf5xx_ac97_warm_reset,
250 .reset = bf5xx_ac97_cold_reset,
251};
252EXPORT_SYMBOL_GPL(soc_ac97_ops);
253
254#ifdef CONFIG_PM
255static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
256{
257 struct sport_device *sport =
258 (struct sport_device *)dai->private_data;
259
260 pr_debug("%s : sport %d\n", __func__, dai->id);
261 if (!dai->active)
262 return 0;
263 if (dai->capture.active)
264 sport_rx_stop(sport);
265 if (dai->playback.active)
266 sport_tx_stop(sport);
267 return 0;
268}
269
270static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
271{
272 int ret;
273 struct sport_device *sport =
274 (struct sport_device *)dai->private_data;
275
276 pr_debug("%s : sport %d\n", __func__, dai->id);
277 if (!dai->active)
278 return 0;
279
280#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
281 ret = sport_set_multichannel(sport, 16, 0x3FF, 1);
282#else
283 ret = sport_set_multichannel(sport, 16, 0x1F, 1);
284#endif
285 if (ret) {
286 pr_err("SPORT is busy!\n");
287 return -EBUSY;
288 }
289
290 ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1));
291 if (ret) {
292 pr_err("SPORT is busy!\n");
293 return -EBUSY;
294 }
295
296 ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1));
297 if (ret) {
298 pr_err("SPORT is busy!\n");
299 return -EBUSY;
300 }
301
302 return 0;
303}
304
305#else
306#define bf5xx_ac97_suspend NULL
307#define bf5xx_ac97_resume NULL
308#endif
309
310static int bf5xx_ac97_probe(struct platform_device *pdev,
311 struct snd_soc_dai *dai)
312{
313 int ret = 0;
314 cmd_count = (int *)get_zeroed_page(GFP_KERNEL);
315 if (cmd_count == NULL)
316 return -ENOMEM;
317
318 if (peripheral_request_list(sport_req[sport_num], "soc-audio")) {
319 pr_err("Requesting Peripherals failed\n");
320 ret = -EFAULT;
321 goto peripheral_err;
322 }
323
324#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
325
326 if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
327 pr_err("Failed to request GPIO_%d for reset\n",
328 CONFIG_SND_BF5XX_RESET_GPIO_NUM);
329 ret = -1;
330 goto gpio_err;
331 }
332 gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
333#endif
334 sport_handle = sport_init(&sport_params[sport_num], 2, \
335 sizeof(struct ac97_frame), NULL);
336 if (!sport_handle) {
337 ret = -ENODEV;
338 goto sport_err;
339 }
340
341#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
342 ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 1);
343#else
344 ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
345#endif
346 if (ret) {
347 pr_err("SPORT is busy!\n");
348 ret = -EBUSY;
349 goto sport_config_err;
350 }
351
352 ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
353 if (ret) {
354 pr_err("SPORT is busy!\n");
355 ret = -EBUSY;
356 goto sport_config_err;
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 ret = -EBUSY;
363 goto sport_config_err;
364 }
365
366 return 0;
367
368sport_config_err:
369 kfree(sport_handle);
370sport_err:
371#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
372 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
373gpio_err:
374#endif
375 peripheral_free_list(sport_req[sport_num]);
376peripheral_err:
377 free_page((unsigned long)cmd_count);
378 cmd_count = NULL;
379
380 return ret;
381}
382
383static void bf5xx_ac97_remove(struct platform_device *pdev,
384 struct snd_soc_dai *dai)
385{
386 free_page((unsigned long)cmd_count);
387 cmd_count = NULL;
388 peripheral_free_list(sport_req[sport_num]);
389#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
390 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
391#endif
392}
393
394struct snd_soc_dai bfin_ac97_dai = {
395 .name = "bf5xx-ac97",
396 .id = 0,
397 .ac97_control = 1,
398 .probe = bf5xx_ac97_probe,
399 .remove = bf5xx_ac97_remove,
400 .suspend = bf5xx_ac97_suspend,
401 .resume = bf5xx_ac97_resume,
402 .playback = {
403 .stream_name = "AC97 Playback",
404 .channels_min = 2,
405#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
406 .channels_max = 6,
407#else
408 .channels_max = 2,
409#endif
410 .rates = SNDRV_PCM_RATE_48000,
411 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
412 .capture = {
413 .stream_name = "AC97 Capture",
414 .channels_min = 2,
415 .channels_max = 2,
416 .rates = SNDRV_PCM_RATE_48000,
417 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
418};
419EXPORT_SYMBOL_GPL(bfin_ac97_dai);
420
421static int __init bfin_ac97_init(void)
422{
423 return snd_soc_register_dai(&bfin_ac97_dai);
424}
425module_init(bfin_ac97_init);
426
427static void __exit bfin_ac97_exit(void)
428{
429 snd_soc_unregister_dai(&bfin_ac97_dai);
430}
431module_exit(bfin_ac97_exit);
432
433MODULE_AUTHOR("Roy Huang");
434MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
435MODULE_LICENSE("GPL");
436
