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Barry Song01e2ab22009-07-27 18:06:39 +08001/*
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
Barry Song01e2ab22009-07-27 18:06:39 +080049static struct bf5xx_tdm_port bf5xx_tdm;
50static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
51
52static 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
Cliff Caidf0fd5e2009-09-23 11:51:05 -040073 * codecs and EMAC using Port G concurrently.
Barry Song01e2ab22009-07-27 18:06:39 +080074 */
Cliff Caidf0fd5e2009-09-23 11:51:05 -040075#ifdef CONFIG_BF527_SPORT0_PORTG
Barry Song01e2ab22009-07-27 18:06:39 +080076#define LOCAL_SPORT0_TFS (0)
Cliff Caidf0fd5e2009-09-23 11:51:05 -040077#else
78#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
Barry Song01e2ab22009-07-27 18:06:39 +080079#endif
80
81static 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
86static 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
118static 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
168static 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
Barry Song08db48f2009-09-15 11:24:52 +0800176static 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
Barry Song01e2ab22009-07-27 18:06:39 +0800210#ifdef CONFIG_PM
211static int bf5xx_tdm_suspend(struct snd_soc_dai *dai)
212{
Mike Frysinger15d2e222011-01-11 23:08:19 -0500213 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
Barry Song01e2ab22009-07-27 18:06:39 +0800214
215 if (!dai->active)
216 return 0;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000217 if (dai->capture_active)
Barry Song01e2ab22009-07-27 18:06:39 +0800218 sport_rx_stop(sport);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000219 if (dai->playback_active)
Barry Song01e2ab22009-07-27 18:06:39 +0800220 sport_tx_stop(sport);
221 return 0;
222}
223
224static int bf5xx_tdm_resume(struct snd_soc_dai *dai)
225{
226 int ret;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000227 struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
Barry Song01e2ab22009-07-27 18:06:39 +0800228
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
Barry Song950a95d2011-01-12 02:59:55 -0500238 ret = sport_config_rx(sport, 0, 0x1F, 0, 0);
Barry Song01e2ab22009-07-27 18:06:39 +0800239 if (ret) {
240 pr_err("SPORT is busy!\n");
241 ret = -EBUSY;
242 }
243
Barry Song950a95d2011-01-12 02:59:55 -0500244 ret = sport_config_tx(sport, 0, 0x1F, 0, 0);
Barry Song01e2ab22009-07-27 18:06:39 +0800245 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
258static 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,
Barry Song08db48f2009-09-15 11:24:52 +0800262 .set_channel_map = bf5xx_tdm_set_channel_map,
Barry Song01e2ab22009-07-27 18:06:39 +0800263};
264
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000265static struct snd_soc_dai_driver bf5xx_tdm_dai = {
Barry Song01e2ab22009-07-27 18:06:39 +0800266 .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};
Barry Song01e2ab22009-07-27 18:06:39 +0800280
281static 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
Barry Song950a95d2011-01-12 02:59:55 -0500306 ret = sport_config_rx(sport_handle, 0, 0x1F, 0, 0);
Barry Song01e2ab22009-07-27 18:06:39 +0800307 if (ret) {
308 pr_err("SPORT is busy!\n");
309 ret = -EBUSY;
310 goto sport_config_err;
311 }
312
Barry Song950a95d2011-01-12 02:59:55 -0500313 ret = sport_config_tx(sport_handle, 0, 0x1F, 0, 0);
Barry Song01e2ab22009-07-27 18:06:39 +0800314 if (ret) {
315 pr_err("SPORT is busy!\n");
316 ret = -EBUSY;
317 goto sport_config_err;
318 }
319
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000320 ret = snd_soc_register_dai(&pdev->dev, &bf5xx_tdm_dai);
Barry Song01e2ab22009-07-27 18:06:39 +0800321 if (ret) {
322 pr_err("Failed to register DAI: %d\n", ret);
323 goto sport_config_err;
324 }
Barry Song08db48f2009-09-15 11:24:52 +0800325
326 sport_handle->private_data = &bf5xx_tdm;
Barry Song01e2ab22009-07-27 18:06:39 +0800327 return 0;
328
329sport_config_err:
330 peripheral_free_list(&sport_req[sport_num][0]);
331 return ret;
332}
333
334static int __devexit bfin_tdm_remove(struct platform_device *pdev)
335{
336 peripheral_free_list(&sport_req[sport_num][0]);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000337 snd_soc_unregister_dai(&pdev->dev);
Barry Song01e2ab22009-07-27 18:06:39 +0800338
339 return 0;
340}
341
342static 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
351static int __init bfin_tdm_init(void)
352{
353 return platform_driver_register(&bfin_tdm_driver);
354}
355module_init(bfin_tdm_init);
356
357static void __exit bfin_tdm_exit(void)
358{
359 platform_driver_unregister(&bfin_tdm_driver);
360}
361module_exit(bfin_tdm_exit);
362
363/* Module information */
364MODULE_AUTHOR("Barry Song");
365MODULE_DESCRIPTION("TDM driver for ADI Blackfin");
366MODULE_LICENSE("GPL");
367