Commit | Line | Data |
---|---|---|
01e2ab20 BS |
1 | /* |
2 | * File: sound/soc/blackfin/bf5xx-tdm.c | |
3 | * Author: Barry Song <Barry.Song@analog.com> | |
4 | * | |
5 | * Created: Thurs June 04 2009 | |
6 | * Description: Blackfin I2S(TDM) CPU DAI driver | |
7 | * Even though TDM mode can be as part of I2S DAI, but there | |
8 | * are so much difference in configuration and data flow, | |
9 | * it's very ugly to integrate I2S and TDM into a module | |
10 | * | |
11 | * Modified: | |
12 | * Copyright 2009 Analog Devices Inc. | |
13 | * | |
14 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, see the file COPYING, or write | |
28 | * to the Free Software Foundation, Inc., | |
29 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
30 | */ | |
31 | ||
32 | #include <linux/init.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/device.h> | |
35 | #include <sound/core.h> | |
36 | #include <sound/pcm.h> | |
37 | #include <sound/pcm_params.h> | |
38 | #include <sound/initval.h> | |
39 | #include <sound/soc.h> | |
40 | ||
41 | #include <asm/irq.h> | |
42 | #include <asm/portmux.h> | |
43 | #include <linux/mutex.h> | |
44 | #include <linux/gpio.h> | |
45 | ||
46 | #include "bf5xx-sport.h" | |
47 | #include "bf5xx-tdm.h" | |
48 | ||
01e2ab20 BS |
49 | static struct bf5xx_tdm_port bf5xx_tdm; |
50 | static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM; | |
51 | ||
52 | static struct sport_param sport_params[2] = { | |
53 | { | |
54 | .dma_rx_chan = CH_SPORT0_RX, | |
55 | .dma_tx_chan = CH_SPORT0_TX, | |
56 | .err_irq = IRQ_SPORT0_ERROR, | |
57 | .regs = (struct sport_register *)SPORT0_TCR1, | |
58 | }, | |
59 | { | |
60 | .dma_rx_chan = CH_SPORT1_RX, | |
61 | .dma_tx_chan = CH_SPORT1_TX, | |
62 | .err_irq = IRQ_SPORT1_ERROR, | |
63 | .regs = (struct sport_register *)SPORT1_TCR1, | |
64 | } | |
65 | }; | |
66 | ||
67 | /* | |
68 | * Setting the TFS pin selector for SPORT 0 based on whether the selected | |
69 | * port id F or G. If the port is F then no conflict should exist for the | |
70 | * TFS. When Port G is selected and EMAC then there is a conflict between | |
71 | * the PHY interrupt line and TFS. Current settings prevent the conflict | |
72 | * by ignoring the TFS pin when Port G is selected. This allows both | |
df0fd5e5 | 73 | * codecs and EMAC using Port G concurrently. |
01e2ab20 | 74 | */ |
df0fd5e5 | 75 | #ifdef CONFIG_BF527_SPORT0_PORTG |
01e2ab20 | 76 | #define LOCAL_SPORT0_TFS (0) |
df0fd5e5 CC |
77 | #else |
78 | #define LOCAL_SPORT0_TFS (P_SPORT0_TFS) | |
01e2ab20 BS |
79 | #endif |
80 | ||
81 | static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS, | |
82 | P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0}, | |
83 | {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI, | |
84 | P_SPORT1_RSCLK, P_SPORT1_TFS, 0} }; | |
85 | ||
86 | static int bf5xx_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai, | |
87 | unsigned int fmt) | |
88 | { | |
89 | int ret = 0; | |
90 | ||
91 | /* interface format:support TDM,slave mode */ | |
92 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
93 | case SND_SOC_DAIFMT_DSP_A: | |
94 | break; | |
95 | default: | |
96 | printk(KERN_ERR "%s: Unknown DAI format type\n", __func__); | |
97 | ret = -EINVAL; | |
98 | break; | |
99 | } | |
100 | ||
101 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
102 | case SND_SOC_DAIFMT_CBM_CFM: | |
103 | break; | |
104 | case SND_SOC_DAIFMT_CBS_CFS: | |
105 | case SND_SOC_DAIFMT_CBM_CFS: | |
106 | case SND_SOC_DAIFMT_CBS_CFM: | |
107 | ret = -EINVAL; | |
108 | break; | |
109 | default: | |
110 | printk(KERN_ERR "%s: Unknown DAI master type\n", __func__); | |
111 | ret = -EINVAL; | |
112 | break; | |
113 | } | |
114 | ||
115 | return ret; | |
116 | } | |
117 | ||
118 | static int bf5xx_tdm_hw_params(struct snd_pcm_substream *substream, | |
119 | struct snd_pcm_hw_params *params, | |
120 | struct snd_soc_dai *dai) | |
121 | { | |
122 | int ret = 0; | |
123 | ||
124 | bf5xx_tdm.tcr2 &= ~0x1f; | |
125 | bf5xx_tdm.rcr2 &= ~0x1f; | |
126 | switch (params_format(params)) { | |
127 | case SNDRV_PCM_FORMAT_S32_LE: | |
128 | bf5xx_tdm.tcr2 |= 31; | |
129 | bf5xx_tdm.rcr2 |= 31; | |
130 | sport_handle->wdsize = 4; | |
131 | break; | |
132 | /* at present, we only support 32bit transfer */ | |
133 | default: | |
134 | pr_err("not supported PCM format yet\n"); | |
135 | return -EINVAL; | |
136 | break; | |
137 | } | |
138 | ||
139 | if (!bf5xx_tdm.configured) { | |
140 | /* | |
141 | * TX and RX are not independent,they are enabled at the | |
142 | * same time, even if only one side is running. So, we | |
143 | * need to configure both of them at the time when the first | |
144 | * stream is opened. | |
145 | * | |
146 | * CPU DAI:slave mode. | |
147 | */ | |
148 | ret = sport_config_rx(sport_handle, bf5xx_tdm.rcr1, | |
149 | bf5xx_tdm.rcr2, 0, 0); | |
150 | if (ret) { | |
151 | pr_err("SPORT is busy!\n"); | |
152 | return -EBUSY; | |
153 | } | |
154 | ||
155 | ret = sport_config_tx(sport_handle, bf5xx_tdm.tcr1, | |
156 | bf5xx_tdm.tcr2, 0, 0); | |
157 | if (ret) { | |
158 | pr_err("SPORT is busy!\n"); | |
159 | return -EBUSY; | |
160 | } | |
161 | ||
162 | bf5xx_tdm.configured = 1; | |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream, | |
169 | struct snd_soc_dai *dai) | |
170 | { | |
171 | /* No active stream, SPORT is allowed to be configured again. */ | |
172 | if (!dai->active) | |
173 | bf5xx_tdm.configured = 0; | |
174 | } | |
175 | ||
08db48f1 BS |
176 | static int bf5xx_tdm_set_channel_map(struct snd_soc_dai *dai, |
177 | unsigned int tx_num, unsigned int *tx_slot, | |
178 | unsigned int rx_num, unsigned int *rx_slot) | |
179 | { | |
180 | int i; | |
181 | unsigned int slot; | |
182 | unsigned int tx_mapped = 0, rx_mapped = 0; | |
183 | ||
184 | if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) || | |
185 | (rx_num > BFIN_TDM_DAI_MAX_SLOTS)) | |
186 | return -EINVAL; | |
187 | ||
188 | for (i = 0; i < tx_num; i++) { | |
189 | slot = tx_slot[i]; | |
190 | if ((slot < BFIN_TDM_DAI_MAX_SLOTS) && | |
191 | (!(tx_mapped & (1 << slot)))) { | |
192 | bf5xx_tdm.tx_map[i] = slot; | |
193 | tx_mapped |= 1 << slot; | |
194 | } else | |
195 | return -EINVAL; | |
196 | } | |
197 | for (i = 0; i < rx_num; i++) { | |
198 | slot = rx_slot[i]; | |
199 | if ((slot < BFIN_TDM_DAI_MAX_SLOTS) && | |
200 | (!(rx_mapped & (1 << slot)))) { | |
201 | bf5xx_tdm.rx_map[i] = slot; | |
202 | rx_mapped |= 1 << slot; | |
203 | } else | |
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
01e2ab20 BS |
210 | #ifdef CONFIG_PM |
211 | static int bf5xx_tdm_suspend(struct snd_soc_dai *dai) | |
212 | { | |
8ff23610 | 213 | struct sport_device *sport = dai->private_data; |
01e2ab20 BS |
214 | |
215 | if (!dai->active) | |
216 | return 0; | |
f0fba2ad | 217 | if (dai->capture_active) |
01e2ab20 | 218 | sport_rx_stop(sport); |
f0fba2ad | 219 | if (dai->playback_active) |
01e2ab20 BS |
220 | sport_tx_stop(sport); |
221 | return 0; | |
222 | } | |
223 | ||
224 | static int bf5xx_tdm_resume(struct snd_soc_dai *dai) | |
225 | { | |
226 | int ret; | |
f0fba2ad | 227 | struct sport_device *sport = snd_soc_dai_get_drvdata(dai); |
01e2ab20 BS |
228 | |
229 | if (!dai->active) | |
230 | return 0; | |
231 | ||
232 | ret = sport_set_multichannel(sport, 8, 0xFF, 1); | |
233 | if (ret) { | |
234 | pr_err("SPORT is busy!\n"); | |
235 | ret = -EBUSY; | |
236 | } | |
237 | ||
238 | ret = sport_config_rx(sport, IRFS, 0x1F, 0, 0); | |
239 | if (ret) { | |
240 | pr_err("SPORT is busy!\n"); | |
241 | ret = -EBUSY; | |
242 | } | |
243 | ||
244 | ret = sport_config_tx(sport, ITFS, 0x1F, 0, 0); | |
245 | if (ret) { | |
246 | pr_err("SPORT is busy!\n"); | |
247 | ret = -EBUSY; | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | #else | |
254 | #define bf5xx_tdm_suspend NULL | |
255 | #define bf5xx_tdm_resume NULL | |
256 | #endif | |
257 | ||
258 | static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = { | |
259 | .hw_params = bf5xx_tdm_hw_params, | |
260 | .set_fmt = bf5xx_tdm_set_dai_fmt, | |
261 | .shutdown = bf5xx_tdm_shutdown, | |
08db48f1 | 262 | .set_channel_map = bf5xx_tdm_set_channel_map, |
01e2ab20 BS |
263 | }; |
264 | ||
f0fba2ad | 265 | static struct snd_soc_dai_driver bf5xx_tdm_dai = { |
01e2ab20 BS |
266 | .suspend = bf5xx_tdm_suspend, |
267 | .resume = bf5xx_tdm_resume, | |
268 | .playback = { | |
269 | .channels_min = 2, | |
270 | .channels_max = 8, | |
271 | .rates = SNDRV_PCM_RATE_48000, | |
272 | .formats = SNDRV_PCM_FMTBIT_S32_LE,}, | |
273 | .capture = { | |
274 | .channels_min = 2, | |
275 | .channels_max = 8, | |
276 | .rates = SNDRV_PCM_RATE_48000, | |
277 | .formats = SNDRV_PCM_FMTBIT_S32_LE,}, | |
278 | .ops = &bf5xx_tdm_dai_ops, | |
279 | }; | |
01e2ab20 BS |
280 | |
281 | static int __devinit bfin_tdm_probe(struct platform_device *pdev) | |
282 | { | |
283 | int ret = 0; | |
284 | ||
285 | if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) { | |
286 | pr_err("Requesting Peripherals failed\n"); | |
287 | return -EFAULT; | |
288 | } | |
289 | ||
290 | /* request DMA for SPORT */ | |
291 | sport_handle = sport_init(&sport_params[sport_num], 4, \ | |
292 | 8 * sizeof(u32), NULL); | |
293 | if (!sport_handle) { | |
294 | peripheral_free_list(&sport_req[sport_num][0]); | |
295 | return -ENODEV; | |
296 | } | |
297 | ||
298 | /* SPORT works in TDM mode */ | |
299 | ret = sport_set_multichannel(sport_handle, 8, 0xFF, 1); | |
300 | if (ret) { | |
301 | pr_err("SPORT is busy!\n"); | |
302 | ret = -EBUSY; | |
303 | goto sport_config_err; | |
304 | } | |
305 | ||
306 | ret = sport_config_rx(sport_handle, IRFS, 0x1F, 0, 0); | |
307 | if (ret) { | |
308 | pr_err("SPORT is busy!\n"); | |
309 | ret = -EBUSY; | |
310 | goto sport_config_err; | |
311 | } | |
312 | ||
313 | ret = sport_config_tx(sport_handle, ITFS, 0x1F, 0, 0); | |
314 | if (ret) { | |
315 | pr_err("SPORT is busy!\n"); | |
316 | ret = -EBUSY; | |
317 | goto sport_config_err; | |
318 | } | |
319 | ||
f0fba2ad | 320 | ret = snd_soc_register_dai(&pdev->dev, &bf5xx_tdm_dai); |
01e2ab20 BS |
321 | if (ret) { |
322 | pr_err("Failed to register DAI: %d\n", ret); | |
323 | goto sport_config_err; | |
324 | } | |
08db48f1 BS |
325 | |
326 | sport_handle->private_data = &bf5xx_tdm; | |
01e2ab20 BS |
327 | return 0; |
328 | ||
329 | sport_config_err: | |
330 | peripheral_free_list(&sport_req[sport_num][0]); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | static int __devexit bfin_tdm_remove(struct platform_device *pdev) | |
335 | { | |
336 | peripheral_free_list(&sport_req[sport_num][0]); | |
f0fba2ad | 337 | snd_soc_unregister_dai(&pdev->dev); |
01e2ab20 BS |
338 | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static struct platform_driver bfin_tdm_driver = { | |
343 | .probe = bfin_tdm_probe, | |
344 | .remove = __devexit_p(bfin_tdm_remove), | |
345 | .driver = { | |
346 | .name = "bfin-tdm", | |
347 | .owner = THIS_MODULE, | |
348 | }, | |
349 | }; | |
350 | ||
351 | static int __init bfin_tdm_init(void) | |
352 | { | |
353 | return platform_driver_register(&bfin_tdm_driver); | |
354 | } | |
355 | module_init(bfin_tdm_init); | |
356 | ||
357 | static void __exit bfin_tdm_exit(void) | |
358 | { | |
359 | platform_driver_unregister(&bfin_tdm_driver); | |
360 | } | |
361 | module_exit(bfin_tdm_exit); | |
362 | ||
363 | /* Module information */ | |
364 | MODULE_AUTHOR("Barry Song"); | |
365 | MODULE_DESCRIPTION("TDM driver for ADI Blackfin"); | |
366 | MODULE_LICENSE("GPL"); | |
367 |