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8#include <linux/module.h>
9#include <linux/of_device.h>
10#include <linux/of_platform.h>
11#include <linux/delay.h>
12#include <linux/time.h>
13
14#include <sound/pcm.h>
15#include <sound/pcm_params.h>
16#include <sound/soc.h>
17
18#include <asm/time.h>
19#include <asm/delay.h>
20#include <asm/mpc52xx.h>
21#include <asm/mpc52xx_psc.h>
22
23#include "mpc5200_dma.h"
24
25#define DRV_NAME "mpc5200-psc-ac97"
26
27
28static struct psc_dma *psc_dma;
29
30static unsigned short psc_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
31{
32 int status;
33 unsigned int val;
34
35 mutex_lock(&psc_dma->mutex);
36
37
38 status = spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
39 MPC52xx_PSC_SR_CMDSEND), 100, 0);
40 if (status == 0) {
41 pr_err("timeout on ac97 bus (rdy)\n");
42 mutex_unlock(&psc_dma->mutex);
43 return -ENODEV;
44 }
45
46
47 in_be32(&psc_dma->psc_regs->ac97_data);
48
49
50 out_be32(&psc_dma->psc_regs->ac97_cmd, (1<<31) | ((reg & 0x7f) << 24));
51
52
53 status = spin_event_timeout((in_be16(&psc_dma->psc_regs->sr_csr.status) &
54 MPC52xx_PSC_SR_DATA_VAL), 100, 0);
55 if (status == 0) {
56 pr_err("timeout on ac97 read (val) %x\n",
57 in_be16(&psc_dma->psc_regs->sr_csr.status));
58 mutex_unlock(&psc_dma->mutex);
59 return -ENODEV;
60 }
61
62 val = in_be32(&psc_dma->psc_regs->ac97_data);
63 if (((val >> 24) & 0x7f) != reg) {
64 pr_err("reg echo error on ac97 read\n");
65 mutex_unlock(&psc_dma->mutex);
66 return -ENODEV;
67 }
68 val = (val >> 8) & 0xffff;
69
70 mutex_unlock(&psc_dma->mutex);
71 return (unsigned short) val;
72}
73
74static void psc_ac97_write(struct snd_ac97 *ac97,
75 unsigned short reg, unsigned short val)
76{
77 int status;
78
79 mutex_lock(&psc_dma->mutex);
80
81
82 status = spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
83 MPC52xx_PSC_SR_CMDSEND), 100, 0);
84 if (status == 0) {
85 pr_err("timeout on ac97 bus (write)\n");
86 goto out;
87 }
88
89 out_be32(&psc_dma->psc_regs->ac97_cmd,
90 ((reg & 0x7f) << 24) | (val << 8));
91
92 out:
93 mutex_unlock(&psc_dma->mutex);
94}
95
96static void psc_ac97_warm_reset(struct snd_ac97 *ac97)
97{
98 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
99
100 mutex_lock(&psc_dma->mutex);
101
102 out_be32(®s->sicr, psc_dma->sicr | MPC52xx_PSC_SICR_AWR);
103 udelay(3);
104 out_be32(®s->sicr, psc_dma->sicr);
105
106 mutex_unlock(&psc_dma->mutex);
107}
108
109static void psc_ac97_cold_reset(struct snd_ac97 *ac97)
110{
111 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
112
113 mutex_lock(&psc_dma->mutex);
114 dev_dbg(psc_dma->dev, "cold reset\n");
115
116 mpc5200_psc_ac97_gpio_reset(psc_dma->id);
117
118
119 out_be32(®s->sicr, psc_dma->sicr | MPC52xx_PSC_SICR_ACRB);
120
121
122 out_8(®s->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
123
124 mutex_unlock(&psc_dma->mutex);
125
126 usleep_range(1000, 2000);
127 psc_ac97_warm_reset(ac97);
128}
129
130static struct snd_ac97_bus_ops psc_ac97_ops = {
131 .read = psc_ac97_read,
132 .write = psc_ac97_write,
133 .reset = psc_ac97_cold_reset,
134 .warm_reset = psc_ac97_warm_reset,
135};
136
137static int psc_ac97_hw_analog_params(struct snd_pcm_substream *substream,
138 struct snd_pcm_hw_params *params,
139 struct snd_soc_dai *cpu_dai)
140{
141 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
142 struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma);
143
144 dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
145 " periods=%i buffer_size=%i buffer_bytes=%i channels=%i"
146 " rate=%i format=%i\n",
147 __func__, substream, params_period_size(params),
148 params_period_bytes(params), params_periods(params),
149 params_buffer_size(params), params_buffer_bytes(params),
150 params_channels(params), params_rate(params),
151 params_format(params));
152
153
154 s->ac97_slot_bits = (params_channels(params) == 1) ? 0x100 : 0x300;
155 if (substream->pstr->stream != SNDRV_PCM_STREAM_CAPTURE)
156 s->ac97_slot_bits <<= 16;
157 return 0;
158}
159
160static int psc_ac97_hw_digital_params(struct snd_pcm_substream *substream,
161 struct snd_pcm_hw_params *params,
162 struct snd_soc_dai *cpu_dai)
163{
164 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
165
166 dev_dbg(psc_dma->dev, "%s(substream=%p)\n", __func__, substream);
167
168 if (params_channels(params) == 1)
169 out_be32(&psc_dma->psc_regs->ac97_slots, 0x01000000);
170 else
171 out_be32(&psc_dma->psc_regs->ac97_slots, 0x03000000);
172
173 return 0;
174}
175
176static int psc_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
177 struct snd_soc_dai *dai)
178{
179 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(dai);
180 struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma);
181
182 switch (cmd) {
183 case SNDRV_PCM_TRIGGER_START:
184 dev_dbg(psc_dma->dev, "AC97 START: stream=%i\n",
185 substream->pstr->stream);
186
187
188 psc_dma->slots |= s->ac97_slot_bits;
189 out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
190 break;
191
192 case SNDRV_PCM_TRIGGER_STOP:
193 dev_dbg(psc_dma->dev, "AC97 STOP: stream=%i\n",
194 substream->pstr->stream);
195
196
197 psc_dma->slots &= ~(s->ac97_slot_bits);
198 out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots);
199 break;
200 }
201 return 0;
202}
203
204static int psc_ac97_probe(struct snd_soc_dai *cpu_dai)
205{
206 struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
207 struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
208
209
210 out_8(®s->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
211 return 0;
212}
213
214
215
216
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222
223
224static const struct snd_soc_dai_ops psc_ac97_analog_ops = {
225 .hw_params = psc_ac97_hw_analog_params,
226 .trigger = psc_ac97_trigger,
227};
228
229static const struct snd_soc_dai_ops psc_ac97_digital_ops = {
230 .hw_params = psc_ac97_hw_digital_params,
231};
232
233static struct snd_soc_dai_driver psc_ac97_dai[] = {
234{
235 .name = "mpc5200-psc-ac97.0",
236 .probe = psc_ac97_probe,
237 .playback = {
238 .stream_name = "AC97 Playback",
239 .channels_min = 1,
240 .channels_max = 6,
241 .rates = SNDRV_PCM_RATE_8000_48000,
242 .formats = SNDRV_PCM_FMTBIT_S32_BE,
243 },
244 .capture = {
245 .stream_name = "AC97 Capture",
246 .channels_min = 1,
247 .channels_max = 2,
248 .rates = SNDRV_PCM_RATE_8000_48000,
249 .formats = SNDRV_PCM_FMTBIT_S32_BE,
250 },
251 .ops = &psc_ac97_analog_ops,
252},
253{
254 .name = "mpc5200-psc-ac97.1",
255 .playback = {
256 .stream_name = "AC97 SPDIF",
257 .channels_min = 1,
258 .channels_max = 2,
259 .rates = SNDRV_PCM_RATE_32000 | \
260 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
261 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
262 },
263 .ops = &psc_ac97_digital_ops,
264} };
265
266static const struct snd_soc_component_driver psc_ac97_component = {
267 .name = DRV_NAME,
268};
269
270
271
272
273
274
275
276static int psc_ac97_of_probe(struct platform_device *op)
277{
278 int rc;
279 struct mpc52xx_psc __iomem *regs;
280
281 rc = mpc5200_audio_dma_create(op);
282 if (rc != 0)
283 return rc;
284
285 rc = snd_soc_set_ac97_ops(&psc_ac97_ops);
286 if (rc != 0) {
287 dev_err(&op->dev, "Failed to set AC'97 ops: %d\n", rc);
288 return rc;
289 }
290
291 rc = snd_soc_register_component(&op->dev, &psc_ac97_component,
292 psc_ac97_dai, ARRAY_SIZE(psc_ac97_dai));
293 if (rc != 0) {
294 dev_err(&op->dev, "Failed to register DAI\n");
295 return rc;
296 }
297
298 psc_dma = dev_get_drvdata(&op->dev);
299 regs = psc_dma->psc_regs;
300
301 psc_dma->imr = 0;
302 out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr);
303
304
305 psc_dma->sicr = MPC52xx_PSC_SICR_SIM_AC97 | MPC52xx_PSC_SICR_ENAC97;
306 out_be32(®s->sicr, psc_dma->sicr);
307
308
309 out_be32(®s->ac97_slots, 0x00000000);
310
311 return 0;
312}
313
314static int psc_ac97_of_remove(struct platform_device *op)
315{
316 mpc5200_audio_dma_destroy(op);
317 snd_soc_unregister_component(&op->dev);
318 snd_soc_set_ac97_ops(NULL);
319 return 0;
320}
321
322
323static const struct of_device_id psc_ac97_match[] = {
324 { .compatible = "fsl,mpc5200-psc-ac97", },
325 { .compatible = "fsl,mpc5200b-psc-ac97", },
326 {}
327};
328MODULE_DEVICE_TABLE(of, psc_ac97_match);
329
330static struct platform_driver psc_ac97_driver = {
331 .probe = psc_ac97_of_probe,
332 .remove = psc_ac97_of_remove,
333 .driver = {
334 .name = "mpc5200-psc-ac97",
335 .of_match_table = psc_ac97_match,
336 },
337};
338
339module_platform_driver(psc_ac97_driver);
340
341MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
342MODULE_DESCRIPTION("mpc5200 AC97 module");
343MODULE_LICENSE("GPL");
344
345
