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f2028623 CC |
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 | ||
54 | static int *cmd_count; | |
55 | static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM; | |
56 | ||
57 | #if defined(CONFIG_BF54x) | |
58 | static 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 | |
85 | static 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 | ||
101 | void 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 | } | |
109 | EXPORT_SYMBOL(bf5xx_pcm_to_ac97); | |
110 | ||
111 | void 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 | } | |
117 | EXPORT_SYMBOL(bf5xx_ac97_to_pcm); | |
118 | ||
119 | static 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 | ||
125 | static 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 | ||
f2028623 CC |
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 | ||
145 | static 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 | /* When dma descriptor is enabled, the register should not be read */ | |
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 | ||
169 | void 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); /* write */ | |
176 | enqueue_cmd(ac97, (reg << 8) | 0x8000, 0); /* read back */ | |
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 | ||
188 | static 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 | ||
214 | static 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 | /* It is specified for bf548-ezkit */ | |
220 | gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0); | |
221 | /* Keep reset pin low for 1 ms */ | |
222 | mdelay(1); | |
223 | gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1); | |
224 | /* Wait for bit clock recover */ | |
225 | mdelay(1); | |
226 | #else | |
227 | pr_info("%s: Not implemented\n", __func__); | |
228 | #endif | |
229 | } | |
230 | ||
231 | struct 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 | }; | |
237 | EXPORT_SYMBOL_GPL(soc_ac97_ops); | |
238 | ||
239 | #ifdef CONFIG_PM | |
240 | static 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 | ||
256 | static 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 | ||
297 | static 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 | /* Request PB3 as reset pin */ | |
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 | /*SPORT works in TDM mode to simulate AC97 transfers*/ | |
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 | ||
371 | static 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 | ||
381 | struct 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 | }; | |
402 | EXPORT_SYMBOL_GPL(bfin_ac97_dai); | |
403 | ||
404 | MODULE_AUTHOR("Roy Huang"); | |
405 | MODULE_DESCRIPTION("AC97 driver for ADI Blackfin"); | |
406 | MODULE_LICENSE("GPL"); |