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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#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
133 nextwrite = (struct ac97_frame *)(sport->tx_buf + \
134 nextfrag * sport->tx_fragsize);
135 pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
136 sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
137 nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
138 nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
139 nextwrite[cmd_count[nextfrag]].ac97_data = data;
140 ++cmd_count[nextfrag];
141 pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
142 addr >> 8, data, nextfrag);
143}
144
145static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
146 unsigned short reg)
147{
148 struct ac97_frame out_frame[2], in_frame[2];
149
150 pr_debug("%s enter 0x%x\n", __func__, reg);
151
152
153 if (sport_handle->tx_run || sport_handle->rx_run) {
154 pr_err("Could you send a mail to cliff.cai@analog.com "
155 "to report this?\n");
156 return -EFAULT;
157 }
158
159 memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
160 memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
161 out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
162 out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
163 sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
164 (unsigned char *)&in_frame,
165 2 * sizeof(struct ac97_frame));
166 return in_frame[1].ac97_data;
167}
168
169void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
170 unsigned short val)
171{
172 pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
173
174 if (sport_handle->tx_run) {
175 enqueue_cmd(ac97, (reg << 8), val);
176 enqueue_cmd(ac97, (reg << 8) | 0x8000, 0);
177 } else {
178 struct ac97_frame frame;
179 memset(&frame, 0, sizeof(struct ac97_frame));
180 frame.ac97_tag = TAG_VALID | TAG_CMD;
181 frame.ac97_addr = (reg << 8);
182 frame.ac97_data = val;
183 sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
184 NULL, sizeof(struct ac97_frame));
185 }
186}
187
188static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
189{
190#if defined(CONFIG_BF54x) || defined(CONFIG_BF561) || \
191 (defined(BF537_FAMILY) && (CONFIG_SND_BF5XX_SPORT_NUM == 1))
192
193#define CONCAT(a, b, c) a ## b ## c
194#define BFIN_SPORT_RFS(x) CONCAT(P_SPORT, x, _RFS)
195
196 u16 per = BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM);
197 u16 gpio = P_IDENT(BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM));
198
199 pr_debug("%s enter\n", __func__);
200
201 peripheral_free(per);
202 gpio_request(gpio, "bf5xx-ac97");
203 gpio_direction_output(gpio, 1);
204 udelay(2);
205 gpio_set_value(gpio, 0);
206 udelay(1);
207 gpio_free(gpio);
208 peripheral_request(per, "soc-audio");
209#else
210 pr_info("%s: Not implemented\n", __func__);
211#endif
212}
213
214static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
215{
216#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
217 pr_debug("%s enter\n", __func__);
218
219
220 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
221
222 mdelay(1);
223 gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
224
225 mdelay(1);
226#else
227 pr_info("%s: Not implemented\n", __func__);
228#endif
229}
230
231struct snd_ac97_bus_ops soc_ac97_ops = {
232 .read = bf5xx_ac97_read,
233 .write = bf5xx_ac97_write,
234 .warm_reset = bf5xx_ac97_warm_reset,
235 .reset = bf5xx_ac97_cold_reset,
236};
237EXPORT_SYMBOL_GPL(soc_ac97_ops);
238
239#ifdef CONFIG_PM
240static int bf5xx_ac97_suspend(struct platform_device *pdev,
241 struct snd_soc_dai *dai)
242{
243 struct sport_device *sport =
244 (struct sport_device *)dai->private_data;
245
246 pr_debug("%s : sport %d\n", __func__, dai->id);
247 if (!dai->active)
248 return 0;
249 if (dai->capture.active)
250 sport_rx_stop(sport);
251 if (dai->playback.active)
252 sport_tx_stop(sport);
253 return 0;
254}
255
256static int bf5xx_ac97_resume(struct platform_device *pdev,
257 struct snd_soc_dai *dai)
258{
259 int ret;
260 struct sport_device *sport =
261 (struct sport_device *)dai->private_data;
262
263 pr_debug("%s : sport %d\n", __func__, dai->id);
264 if (!dai->active)
265 return 0;
266
267 ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
268 if (ret) {
269 pr_err("SPORT is busy!\n");
270 return -EBUSY;
271 }
272
273 ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
274 if (ret) {
275 pr_err("SPORT is busy!\n");
276 return -EBUSY;
277 }
278
279 ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
280 if (ret) {
281 pr_err("SPORT is busy!\n");
282 return -EBUSY;
283 }
284
285 if (dai->capture.active)
286 sport_rx_start(sport);
287 if (dai->playback.active)
288 sport_tx_start(sport);
289 return 0;
290}
291
292#else
293#define bf5xx_ac97_suspend NULL
294#define bf5xx_ac97_resume NULL
295#endif
296
297static int bf5xx_ac97_probe(struct platform_device *pdev,
298 struct snd_soc_dai *dai)
299{
300 int ret;
301#if defined(CONFIG_BF54x)
302 u16 sport_req[][7] = {PIN_REQ_SPORT_0, PIN_REQ_SPORT_1,
303 PIN_REQ_SPORT_2, PIN_REQ_SPORT_3};
304#else
305 u16 sport_req[][7] = {PIN_REQ_SPORT_0, PIN_REQ_SPORT_1};
306#endif
307 cmd_count = (int *)get_zeroed_page(GFP_KERNEL);
308 if (cmd_count == NULL)
309 return -ENOMEM;
310
311 if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
312 pr_err("Requesting Peripherals failed\n");
313 return -EFAULT;
314 }
315
316#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
317
318 if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
319 pr_err("Failed to request GPIO_%d for reset\n",
320 CONFIG_SND_BF5XX_RESET_GPIO_NUM);
321 peripheral_free_list(&sport_req[sport_num][0]);
322 return -1;
323 }
324 gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
325#endif
326 sport_handle = sport_init(&sport_params[sport_num], 2, \
327 sizeof(struct ac97_frame), NULL);
328 if (!sport_handle) {
329 peripheral_free_list(&sport_req[sport_num][0]);
330#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
331 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
332#endif
333 return -ENODEV;
334 }
335
336 ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
337 if (ret) {
338 pr_err("SPORT is busy!\n");
339 kfree(sport_handle);
340 peripheral_free_list(&sport_req[sport_num][0]);
341#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
342 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
343#endif
344 return -EBUSY;
345 }
346
347 ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
348 if (ret) {
349 pr_err("SPORT is busy!\n");
350 kfree(sport_handle);
351 peripheral_free_list(&sport_req[sport_num][0]);
352#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
353 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
354#endif
355 return -EBUSY;
356 }
357
358 ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
359 if (ret) {
360 pr_err("SPORT is busy!\n");
361 kfree(sport_handle);
362 peripheral_free_list(&sport_req[sport_num][0]);
363#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
364 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
365#endif
366 return -EBUSY;
367 }
368 return 0;
369}
370
371static void bf5xx_ac97_remove(struct platform_device *pdev,
372 struct snd_soc_dai *dai)
373{
374 free_page((unsigned long)cmd_count);
375 cmd_count = NULL;
376#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
377 gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
378#endif
379}
380
381struct snd_soc_dai bfin_ac97_dai = {
382 .name = "bf5xx-ac97",
383 .id = 0,
384 .type = SND_SOC_DAI_AC97,
385 .probe = bf5xx_ac97_probe,
386 .remove = bf5xx_ac97_remove,
387 .suspend = bf5xx_ac97_suspend,
388 .resume = bf5xx_ac97_resume,
389 .playback = {
390 .stream_name = "AC97 Playback",
391 .channels_min = 2,
392 .channels_max = 2,
393 .rates = SNDRV_PCM_RATE_48000,
394 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
395 .capture = {
396 .stream_name = "AC97 Capture",
397 .channels_min = 2,
398 .channels_max = 2,
399 .rates = SNDRV_PCM_RATE_48000,
400 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
401};
402EXPORT_SYMBOL_GPL(bfin_ac97_dai);
403
404MODULE_AUTHOR("Roy Huang");
405MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
406MODULE_LICENSE("GPL");
407
