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12#include <linux/module.h>
13#include <linux/of_device.h>
14#include <linux/of_platform.h>
15#include <linux/delay.h>
16#include <linux/time.h>
17
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/soc.h>
21
22#include <asm/time.h>
23#include <asm/delay.h>
24#include <asm/mpc52xx.h>
25#include <asm/mpc52xx_psc.h>
26
27#include "mpc5200_dma.h"
28
29#define DRV_NAME "mpc5200-psc-ac97"
30
31
32static struct psc_dma *psc_dma;
33
34static unsigned short psc_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
35{
36 int status;
37 unsigned int val;
38
39 mutex_lock(&psc_dma->mutex);
40
41
42 status = spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
43 MPC52xx_PSC_SR_CMDSEND), 100, 0);
44 if (status == 0) {
45 pr_err("timeout on ac97 bus (rdy)\n");
46 mutex_unlock(&psc_dma->mutex);
47 return -ENODEV;
48 }
49
50
51 in_be32(&psc_dma->psc_regs->ac97_data);
52
53
54 out_be32(&psc_dma->psc_regs->ac97_cmd, (1<<31) | ((reg & 0x7f) << 24));
55
56
57 status = spin_event_timeout((in_be16(&psc_dma->psc_regs->sr_csr.status) &
58 MPC52xx_PSC_SR_DATA_VAL), 100, 0);
59 if (status == 0) {
60 pr_err("timeout on ac97 read (val) %x\n",
61 in_be16(&psc_dma->psc_regs->sr_csr.status));
62 mutex_unlock(&psc_dma->mutex);
63 return -ENODEV;
64 }
65
66 val = in_be32(&psc_dma->psc_regs->ac97_data);
67 if (((val >> 24) & 0x7f) != reg) {
68 pr_err("reg echo error on ac97 read\n");
69 mutex_unlock(&psc_dma->mutex);
70 return -ENODEV;
71 }
72 val = (val >> 8) & 0xffff;
73
74 mutex_unlock(&psc_dma->mutex);
75 return (unsigned short) val;
76}
77
78static void psc_ac97_write(struct snd_ac97 *ac97,
79 unsigned short reg, unsigned short val)
80{
81 int status;
82
83 mutex_lock(&psc_dma->mutex);
84
85
86 status = spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
87 MPC52xx_PSC_SR_CMDSEND), 100, 0);
88 if (status == 0) {
89 pr_err("timeout on ac97 bus (write)\n");
90 goto out;
91 }
92
93 out_be32(&psc_dma->psc_regs->ac97_cmd,
94 ((reg & 0x7f) << 24) | (val << 8));
95
96 out:
97 mutex_unlock(&psc_dma->mutex);
98}
99
100static void psc_ac97_warm_reset(struct snd_ac97 *ac97)
101{
102 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
103
104 mutex_lock(&psc_dma->mutex);
105
106 out_be32(®s->sicr, psc_dma->sicr | MPC52xx_PSC_SICR_AWR);
107 udelay(3);
108 out_be32(®s->sicr, psc_dma->sicr);
109
110 mutex_unlock(&psc_dma->mutex);
111}
112
113static void psc_ac97_cold_reset(struct snd_ac97 *ac97)
114{
115 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
116
117 mutex_lock(&psc_dma->mutex);
118 dev_dbg(psc_dma->dev, "cold reset\n");
119
120 mpc5200_psc_ac97_gpio_reset(psc_dma->id);
121
122
123 out_be32(®s->sicr, psc_dma->sicr | MPC52xx_PSC_SICR_ACRB);
124
125
126 out_8(®s->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
127
128 mutex_unlock(&psc_dma->mutex);
129
130 usleep_range(1000, 2000);
131 psc_ac97_warm_reset(ac97);
132}
133
134static struct snd_ac97_bus_ops psc_ac97_ops = {
135 .read = psc_ac97_read,
136 .write = psc_ac97_write,
137 .reset = psc_ac97_cold_reset,
138 .warm_reset = psc_ac97_warm_reset,
139};
140
141static int psc_ac97_hw_analog_params(struct snd_pcm_substream *substream,
142 struct snd_pcm_hw_params *params,
143 struct snd_soc_dai *cpu_dai)
144{
145 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
146 struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma);
147
148 dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
149 " periods=%i buffer_size=%i buffer_bytes=%i channels=%i"
150 " rate=%i format=%i\n",
151 __func__, substream, params_period_size(params),
152 params_period_bytes(params), params_periods(params),
153 params_buffer_size(params), params_buffer_bytes(params),
154 params_channels(params), params_rate(params),
155 params_format(params));
156
157
158 s->ac97_slot_bits = (params_channels(params) == 1) ? 0x100 : 0x300;
159 if (substream->pstr->stream != SNDRV_PCM_STREAM_CAPTURE)
160 s->ac97_slot_bits <<= 16;
161 return 0;
162}
163
164static int psc_ac97_hw_digital_params(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params,
166 struct snd_soc_dai *cpu_dai)
167{
168 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
169
170 dev_dbg(psc_dma->dev, "%s(substream=%p)\n", __func__, substream);
171
172 if (params_channels(params) == 1)
173 out_be32(&psc_dma->psc_regs->ac97_slots, 0x01000000);
174 else
175 out_be32(&psc_dma->psc_regs->ac97_slots, 0x03000000);
176
177 return 0;
178}
179
180static int psc_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
181 struct snd_soc_dai *dai)
182{
183 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(dai);
184 struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma);
185
186 switch (cmd) {
187 case SNDRV_PCM_TRIGGER_START:
188 dev_dbg(psc_dma->dev, "AC97 START: stream=%i\n",
189 substream->pstr->stream);
190
191
192 psc_dma->slots |= s->ac97_slot_bits;
193 out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
194 break;
195
196 case SNDRV_PCM_TRIGGER_STOP:
197 dev_dbg(psc_dma->dev, "AC97 STOP: stream=%i\n",
198 substream->pstr->stream);
199
200
201 psc_dma->slots &= ~(s->ac97_slot_bits);
202 out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
203 break;
204 }
205 return 0;
206}
207
208static int psc_ac97_probe(struct snd_soc_dai *cpu_dai)
209{
210 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
211 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
212
213
214 out_8(®s->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
215 return 0;
216}
217
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226
227
228static const struct snd_soc_dai_ops psc_ac97_analog_ops = {
229 .hw_params = psc_ac97_hw_analog_params,
230 .trigger = psc_ac97_trigger,
231};
232
233static const struct snd_soc_dai_ops psc_ac97_digital_ops = {
234 .hw_params = psc_ac97_hw_digital_params,
235};
236
237static struct snd_soc_dai_driver psc_ac97_dai[] = {
238{
239 .name = "mpc5200-psc-ac97.0",
240 .bus_control = true,
241 .probe = psc_ac97_probe,
242 .playback = {
243 .stream_name = "AC97 Playback",
244 .channels_min = 1,
245 .channels_max = 6,
246 .rates = SNDRV_PCM_RATE_8000_48000,
247 .formats = SNDRV_PCM_FMTBIT_S32_BE,
248 },
249 .capture = {
250 .stream_name = "AC97 Capture",
251 .channels_min = 1,
252 .channels_max = 2,
253 .rates = SNDRV_PCM_RATE_8000_48000,
254 .formats = SNDRV_PCM_FMTBIT_S32_BE,
255 },
256 .ops = &psc_ac97_analog_ops,
257},
258{
259 .name = "mpc5200-psc-ac97.1",
260 .bus_control = true,
261 .playback = {
262 .stream_name = "AC97 SPDIF",
263 .channels_min = 1,
264 .channels_max = 2,
265 .rates = SNDRV_PCM_RATE_32000 | \
266 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
267 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
268 },
269 .ops = &psc_ac97_digital_ops,
270} };
271
272static const struct snd_soc_component_driver psc_ac97_component = {
273 .name = DRV_NAME,
274};
275
276
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278
279
280
281
282static int psc_ac97_of_probe(struct platform_device *op)
283{
284 int rc;
285 struct mpc52xx_psc __iomem *regs;
286
287 rc = mpc5200_audio_dma_create(op);
288 if (rc != 0)
289 return rc;
290
291 rc = snd_soc_set_ac97_ops(&psc_ac97_ops);
292 if (rc != 0) {
293 dev_err(&op->dev, "Failed to set AC'97 ops: %d\n", rc);
294 return rc;
295 }
296
297 rc = snd_soc_register_component(&op->dev, &psc_ac97_component,
298 psc_ac97_dai, ARRAY_SIZE(psc_ac97_dai));
299 if (rc != 0) {
300 dev_err(&op->dev, "Failed to register DAI\n");
301 return rc;
302 }
303
304 psc_dma = dev_get_drvdata(&op->dev);
305 regs = psc_dma->psc_regs;
306
307 psc_dma->imr = 0;
308 out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr);
309
310
311 psc_dma->sicr = MPC52xx_PSC_SICR_SIM_AC97 | MPC52xx_PSC_SICR_ENAC97;
312 out_be32(®s->sicr, psc_dma->sicr);
313
314
315 out_be32(®s->ac97_slots, 0x00000000);
316
317 return 0;
318}
319
320static int psc_ac97_of_remove(struct platform_device *op)
321{
322 mpc5200_audio_dma_destroy(op);
323 snd_soc_unregister_component(&op->dev);
324 snd_soc_set_ac97_ops(NULL);
325 return 0;
326}
327
328
329static const struct of_device_id psc_ac97_match[] = {
330 { .compatible = "fsl,mpc5200-psc-ac97", },
331 { .compatible = "fsl,mpc5200b-psc-ac97", },
332 {}
333};
334MODULE_DEVICE_TABLE(of, psc_ac97_match);
335
336static struct platform_driver psc_ac97_driver = {
337 .probe = psc_ac97_of_probe,
338 .remove = psc_ac97_of_remove,
339 .driver = {
340 .name = "mpc5200-psc-ac97",
341 .of_match_table = psc_ac97_match,
342 },
343};
344
345module_platform_driver(psc_ac97_driver);
346
347MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
348MODULE_DESCRIPTION("mpc5200 AC97 module");
349MODULE_LICENSE("GPL");
350
351
