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912c2ac9 CC |
1 | /* |
2 | * File: sound/soc/blackfin/bf5xx-i2s.c | |
3 | * Author: Cliff Cai <Cliff.Cai@analog.com> | |
4 | * | |
5 | * Created: Tue June 06 2008 | |
6 | * Description: Blackfin I2S CPU DAI driver | |
7 | * | |
8 | * Modified: | |
9 | * Copyright 2008 Analog Devices Inc. | |
10 | * | |
11 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, see the file COPYING, or write | |
25 | * to the Free Software Foundation, Inc., | |
26 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
27 | */ | |
28 | ||
29 | #include <linux/init.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/device.h> | |
32 | #include <linux/delay.h> | |
33 | #include <sound/core.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/initval.h> | |
37 | #include <sound/soc.h> | |
38 | ||
39 | #include <asm/irq.h> | |
40 | #include <asm/portmux.h> | |
41 | #include <linux/mutex.h> | |
42 | #include <linux/gpio.h> | |
43 | ||
44 | #include "bf5xx-sport.h" | |
45 | #include "bf5xx-i2s.h" | |
46 | ||
47 | struct bf5xx_i2s_port { | |
48 | u16 tcr1; | |
49 | u16 rcr1; | |
50 | u16 tcr2; | |
51 | u16 rcr2; | |
52 | int counter; | |
53 | }; | |
54 | ||
55 | static struct bf5xx_i2s_port bf5xx_i2s; | |
56 | static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM; | |
57 | ||
58 | static struct sport_param sport_params[2] = { | |
59 | { | |
60 | .dma_rx_chan = CH_SPORT0_RX, | |
61 | .dma_tx_chan = CH_SPORT0_TX, | |
62 | .err_irq = IRQ_SPORT0_ERROR, | |
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_ERROR, | |
69 | .regs = (struct sport_register *)SPORT1_TCR1, | |
70 | } | |
71 | }; | |
72 | ||
c3e5203b CC |
73 | /* |
74 | * Setting the TFS pin selector for SPORT 0 based on whether the selected | |
75 | * port id F or G. If the port is F then no conflict should exist for the | |
76 | * TFS. When Port G is selected and EMAC then there is a conflict between | |
77 | * the PHY interrupt line and TFS. Current settings prevent the conflict | |
78 | * by ignoring the TFS pin when Port G is selected. This allows both | |
79 | * ssm2602 using Port G and EMAC concurrently. | |
80 | */ | |
81 | #ifdef CONFIG_BF527_SPORT0_PORTF | |
82 | #define LOCAL_SPORT0_TFS (P_SPORT0_TFS) | |
83 | #else | |
84 | #define LOCAL_SPORT0_TFS (0) | |
85 | #endif | |
86 | ||
87 | static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS, | |
88 | P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0}, | |
89 | {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI, | |
90 | P_SPORT1_RSCLK, P_SPORT1_TFS, 0} }; | |
33392680 | 91 | |
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92 | static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, |
93 | unsigned int fmt) | |
94 | { | |
95 | int ret = 0; | |
96 | ||
97 | /* interface format:support I2S,slave mode */ | |
98 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
99 | case SND_SOC_DAIFMT_I2S: | |
33392680 CC |
100 | bf5xx_i2s.tcr1 |= TFSR | TCKFE; |
101 | bf5xx_i2s.rcr1 |= RFSR | RCKFE; | |
102 | bf5xx_i2s.tcr2 |= TSFSE; | |
103 | bf5xx_i2s.rcr2 |= RSFSE; | |
104 | break; | |
105 | case SND_SOC_DAIFMT_DSP_A: | |
106 | bf5xx_i2s.tcr1 |= TFSR; | |
107 | bf5xx_i2s.rcr1 |= RFSR; | |
912c2ac9 CC |
108 | break; |
109 | case SND_SOC_DAIFMT_LEFT_J: | |
110 | ret = -EINVAL; | |
111 | break; | |
112 | default: | |
c3e5203b | 113 | printk(KERN_ERR "%s: Unknown DAI format type\n", __func__); |
912c2ac9 CC |
114 | ret = -EINVAL; |
115 | break; | |
116 | } | |
117 | ||
118 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
912c2ac9 CC |
119 | case SND_SOC_DAIFMT_CBM_CFM: |
120 | break; | |
c3e5203b CC |
121 | case SND_SOC_DAIFMT_CBS_CFS: |
122 | case SND_SOC_DAIFMT_CBM_CFS: | |
912c2ac9 CC |
123 | case SND_SOC_DAIFMT_CBS_CFM: |
124 | ret = -EINVAL; | |
125 | break; | |
126 | default: | |
c3e5203b | 127 | printk(KERN_ERR "%s: Unknown DAI master type\n", __func__); |
912c2ac9 CC |
128 | ret = -EINVAL; |
129 | break; | |
130 | } | |
131 | ||
132 | return ret; | |
133 | } | |
134 | ||
dee89c4d MB |
135 | static int bf5xx_i2s_startup(struct snd_pcm_substream *substream, |
136 | struct snd_soc_dai *dai) | |
912c2ac9 CC |
137 | { |
138 | pr_debug("%s enter\n", __func__); | |
139 | ||
140 | /*this counter is used for counting how many pcm streams are opened*/ | |
141 | bf5xx_i2s.counter++; | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
146 | struct snd_pcm_hw_params *params, |
147 | struct snd_soc_dai *dai) | |
912c2ac9 CC |
148 | { |
149 | int ret = 0; | |
150 | ||
151 | bf5xx_i2s.tcr2 &= ~0x1f; | |
152 | bf5xx_i2s.rcr2 &= ~0x1f; | |
153 | switch (params_format(params)) { | |
154 | case SNDRV_PCM_FORMAT_S16_LE: | |
155 | bf5xx_i2s.tcr2 |= 15; | |
156 | bf5xx_i2s.rcr2 |= 15; | |
33392680 | 157 | sport_handle->wdsize = 2; |
912c2ac9 CC |
158 | break; |
159 | case SNDRV_PCM_FORMAT_S24_LE: | |
160 | bf5xx_i2s.tcr2 |= 23; | |
161 | bf5xx_i2s.rcr2 |= 23; | |
33392680 | 162 | sport_handle->wdsize = 3; |
912c2ac9 CC |
163 | break; |
164 | case SNDRV_PCM_FORMAT_S32_LE: | |
165 | bf5xx_i2s.tcr2 |= 31; | |
166 | bf5xx_i2s.rcr2 |= 31; | |
33392680 | 167 | sport_handle->wdsize = 4; |
912c2ac9 CC |
168 | break; |
169 | } | |
170 | ||
171 | if (bf5xx_i2s.counter == 1) { | |
172 | /* | |
173 | * TX and RX are not independent,they are enabled at the | |
174 | * same time, even if only one side is running. So, we | |
175 | * need to configure both of them at the time when the first | |
176 | * stream is opened. | |
177 | * | |
33392680 | 178 | * CPU DAI:slave mode. |
912c2ac9 | 179 | */ |
33392680 CC |
180 | ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1, |
181 | bf5xx_i2s.rcr2, 0, 0); | |
912c2ac9 CC |
182 | if (ret) { |
183 | pr_err("SPORT is busy!\n"); | |
184 | return -EBUSY; | |
185 | } | |
186 | ||
33392680 CC |
187 | ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1, |
188 | bf5xx_i2s.tcr2, 0, 0); | |
912c2ac9 CC |
189 | if (ret) { |
190 | pr_err("SPORT is busy!\n"); | |
191 | return -EBUSY; | |
192 | } | |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
dee89c4d MB |
198 | static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream, |
199 | struct snd_soc_dai *dai) | |
912c2ac9 CC |
200 | { |
201 | pr_debug("%s enter\n", __func__); | |
202 | bf5xx_i2s.counter--; | |
203 | } | |
204 | ||
205 | static int bf5xx_i2s_probe(struct platform_device *pdev, | |
206 | struct snd_soc_dai *dai) | |
207 | { | |
912c2ac9 CC |
208 | pr_debug("%s enter\n", __func__); |
209 | if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) { | |
210 | pr_err("Requesting Peripherals failed\n"); | |
211 | return -EFAULT; | |
212 | } | |
213 | ||
214 | /* request DMA for SPORT */ | |
215 | sport_handle = sport_init(&sport_params[sport_num], 4, \ | |
216 | 2 * sizeof(u32), NULL); | |
217 | if (!sport_handle) { | |
218 | peripheral_free_list(&sport_req[sport_num][0]); | |
219 | return -ENODEV; | |
220 | } | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
dc7d7b83 | 225 | static void bf5xx_i2s_remove(struct snd_soc_dai *dai) |
33392680 CC |
226 | { |
227 | pr_debug("%s enter\n", __func__); | |
228 | peripheral_free_list(&sport_req[sport_num][0]); | |
229 | } | |
230 | ||
912c2ac9 | 231 | #ifdef CONFIG_PM |
dc7d7b83 | 232 | static int bf5xx_i2s_suspend(struct snd_soc_dai *dai) |
912c2ac9 CC |
233 | { |
234 | struct sport_device *sport = | |
235 | (struct sport_device *)dai->private_data; | |
236 | ||
237 | pr_debug("%s : sport %d\n", __func__, dai->id); | |
238 | if (!dai->active) | |
239 | return 0; | |
240 | if (dai->capture.active) | |
241 | sport_rx_stop(sport); | |
242 | if (dai->playback.active) | |
243 | sport_tx_stop(sport); | |
244 | return 0; | |
245 | } | |
246 | ||
247 | static int bf5xx_i2s_resume(struct platform_device *pdev, | |
248 | struct snd_soc_dai *dai) | |
249 | { | |
250 | int ret; | |
251 | struct sport_device *sport = | |
252 | (struct sport_device *)dai->private_data; | |
253 | ||
254 | pr_debug("%s : sport %d\n", __func__, dai->id); | |
255 | if (!dai->active) | |
256 | return 0; | |
257 | ||
258 | ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 0, 0); | |
259 | if (ret) { | |
260 | pr_err("SPORT is busy!\n"); | |
261 | return -EBUSY; | |
262 | } | |
263 | ||
264 | ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|0x1f, 0, 0); | |
265 | if (ret) { | |
266 | pr_err("SPORT is busy!\n"); | |
267 | return -EBUSY; | |
268 | } | |
269 | ||
270 | if (dai->capture.active) | |
271 | sport_rx_start(sport); | |
272 | if (dai->playback.active) | |
273 | sport_tx_start(sport); | |
274 | return 0; | |
275 | } | |
276 | ||
277 | #else | |
278 | #define bf5xx_i2s_suspend NULL | |
279 | #define bf5xx_i2s_resume NULL | |
280 | #endif | |
281 | ||
282 | #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ | |
283 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \ | |
284 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \ | |
285 | SNDRV_PCM_RATE_96000) | |
286 | ||
287 | #define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\ | |
288 | SNDRV_PCM_FMTBIT_S32_LE) | |
289 | ||
290 | struct snd_soc_dai bf5xx_i2s_dai = { | |
291 | .name = "bf5xx-i2s", | |
292 | .id = 0, | |
912c2ac9 | 293 | .probe = bf5xx_i2s_probe, |
33392680 | 294 | .remove = bf5xx_i2s_remove, |
912c2ac9 CC |
295 | .suspend = bf5xx_i2s_suspend, |
296 | .resume = bf5xx_i2s_resume, | |
297 | .playback = { | |
33392680 | 298 | .channels_min = 1, |
912c2ac9 CC |
299 | .channels_max = 2, |
300 | .rates = BF5XX_I2S_RATES, | |
301 | .formats = BF5XX_I2S_FORMATS,}, | |
302 | .capture = { | |
33392680 | 303 | .channels_min = 1, |
912c2ac9 CC |
304 | .channels_max = 2, |
305 | .rates = BF5XX_I2S_RATES, | |
306 | .formats = BF5XX_I2S_FORMATS,}, | |
307 | .ops = { | |
308 | .startup = bf5xx_i2s_startup, | |
309 | .shutdown = bf5xx_i2s_shutdown, | |
dee89c4d | 310 | .hw_params = bf5xx_i2s_hw_params, |
912c2ac9 CC |
311 | .set_fmt = bf5xx_i2s_set_dai_fmt, |
312 | }, | |
313 | }; | |
314 | EXPORT_SYMBOL_GPL(bf5xx_i2s_dai); | |
315 | ||
c9b3a40f | 316 | static int __init bfin_i2s_init(void) |
3f4b783c MB |
317 | { |
318 | return snd_soc_register_dai(&bfin_i2s_dai); | |
319 | } | |
320 | module_init(bfin_i2s_init); | |
321 | ||
322 | static void __exit bfin_i2s_exit(void) | |
323 | { | |
324 | snd_soc_unregister_dai(&bfin_i2s_dai); | |
325 | } | |
326 | module_exit(bfin_i2s_exit); | |
327 | ||
912c2ac9 CC |
328 | /* Module information */ |
329 | MODULE_AUTHOR("Cliff Cai"); | |
330 | MODULE_DESCRIPTION("I2S driver for ADI Blackfin"); | |
331 | MODULE_LICENSE("GPL"); | |
332 |