diff options
author | Manuel Lauss <mano@roarinelk.homelinux.net> | 2007-05-14 12:40:07 -0400 |
---|---|---|
committer | Jaroslav Kysela <perex@suse.cz> | 2007-07-20 05:11:17 -0400 |
commit | aef3b06ac69783d6a6d1e4357c62bab46dd16141 (patch) | |
tree | 7c4e86d880a08ee5639d87a3702f7318203710d5 /sound/soc/sh | |
parent | 80ab1c0e9ea90467e34dd3187b1d8162e8be314b (diff) |
[ALSA] SH7760 ASoC support
ALSA ASoC support for SH7760
This patch adds ALSA ASoC drivers for the Audio interfaces
of the SH7760 SoC:
Add driver for the SH7760 DMA engine (dmabrg)
Add AC97 driver for HAC unit(s) found on SH7760/SH7780
Add I2S driver for SSI unit(s) found on SH7760/SH7780
Add a generic SH7760-AC97 machine driver.
Hook it all up with the build system.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/soc/sh')
-rw-r--r-- | sound/soc/sh/Kconfig | 39 | ||||
-rw-r--r-- | sound/soc/sh/Makefile | 14 | ||||
-rw-r--r-- | sound/soc/sh/dma-sh7760.c | 354 | ||||
-rw-r--r-- | sound/soc/sh/hac.c | 322 | ||||
-rw-r--r-- | sound/soc/sh/sh7760-ac97.c | 92 | ||||
-rw-r--r-- | sound/soc/sh/ssi.c | 400 |
6 files changed, 1221 insertions, 0 deletions
diff --git a/sound/soc/sh/Kconfig b/sound/soc/sh/Kconfig new file mode 100644 index 000000000000..a332e51d6887 --- /dev/null +++ b/sound/soc/sh/Kconfig | |||
@@ -0,0 +1,39 @@ | |||
1 | menu "SoC Audio support for SuperH" | ||
2 | |||
3 | config SND_SOC_PCM_SH7760 | ||
4 | tristate "SoC Audio support for Renesas SH7760" | ||
5 | depends on CPU_SUBTYPE_SH7760 && SND_SOC | ||
6 | select SH_DMABRG | ||
7 | help | ||
8 | Enable this option for SH7760 AC97/I2S audio support. | ||
9 | |||
10 | |||
11 | ## | ||
12 | ## Audio unit modules | ||
13 | ## | ||
14 | |||
15 | config SND_SOC_SH4_HAC | ||
16 | select AC97_BUS | ||
17 | select SND_SOC_AC97_BUS | ||
18 | select SND_AC97_CODEC | ||
19 | tristate | ||
20 | |||
21 | config SND_SOC_SH4_SSI | ||
22 | tristate | ||
23 | |||
24 | |||
25 | |||
26 | ## | ||
27 | ## Boards | ||
28 | ## | ||
29 | |||
30 | config SND_SH7760_AC97 | ||
31 | tristate "SH7760 AC97 sound support" | ||
32 | depends on CPU_SUBTYPE_SH7760 && SND_SOC_PCM_SH7760 | ||
33 | select SND_SOC_SH4_HAC | ||
34 | select SND_SOC_AC97_CODEC | ||
35 | help | ||
36 | This option enables generic sound support for the first | ||
37 | AC97 unit of the SH7760. | ||
38 | |||
39 | endmenu | ||
diff --git a/sound/soc/sh/Makefile b/sound/soc/sh/Makefile new file mode 100644 index 000000000000..a8e8ab81cc6a --- /dev/null +++ b/sound/soc/sh/Makefile | |||
@@ -0,0 +1,14 @@ | |||
1 | ## DMA engines | ||
2 | snd-soc-dma-sh7760-objs := dma-sh7760.o | ||
3 | obj-$(CONFIG_SND_SOC_PCM_SH7760) += snd-soc-dma-sh7760.o | ||
4 | |||
5 | ## audio units found on some SH-4 | ||
6 | snd-soc-hac-objs := hac.o | ||
7 | snd-soc-ssi-objs := ssi.o | ||
8 | obj-$(CONFIG_SND_SOC_SH4_HAC) += snd-soc-hac.o | ||
9 | obj-$(CONFIG_SND_SOC_SH4_SSI) += snd-soc-ssi.o | ||
10 | |||
11 | ## boards | ||
12 | snd-soc-sh7760-ac97-objs := sh7760-ac97.o | ||
13 | |||
14 | obj-$(CONFIG_SND_SH7760_AC97) += snd-soc-sh7760-ac97.o | ||
diff --git a/sound/soc/sh/dma-sh7760.c b/sound/soc/sh/dma-sh7760.c new file mode 100644 index 000000000000..cdee374b843e --- /dev/null +++ b/sound/soc/sh/dma-sh7760.c | |||
@@ -0,0 +1,354 @@ | |||
1 | /* | ||
2 | * SH7760 ("camelot") DMABRG audio DMA unit support | ||
3 | * | ||
4 | * Copyright (C) 2007 Manuel Lauss <mano@roarinelk.homelinux.net> | ||
5 | * licensed under the terms outlined in the file COPYING at the root | ||
6 | * of the linux kernel sources. | ||
7 | * | ||
8 | * The SH7760 DMABRG provides 4 dma channels (2x rec, 2x play), which | ||
9 | * trigger an interrupt when one half of the programmed transfer size | ||
10 | * has been xmitted. | ||
11 | * | ||
12 | * FIXME: little-endian only for now | ||
13 | */ | ||
14 | |||
15 | #include <linux/module.h> | ||
16 | #include <linux/init.h> | ||
17 | #include <linux/platform_device.h> | ||
18 | #include <linux/dma-mapping.h> | ||
19 | #include <sound/driver.h> | ||
20 | #include <sound/core.h> | ||
21 | #include <sound/pcm.h> | ||
22 | #include <sound/pcm_params.h> | ||
23 | #include <sound/soc.h> | ||
24 | #include <asm/dmabrg.h> | ||
25 | |||
26 | |||
27 | /* registers and bits */ | ||
28 | #define BRGATXSAR 0x00 | ||
29 | #define BRGARXDAR 0x04 | ||
30 | #define BRGATXTCR 0x08 | ||
31 | #define BRGARXTCR 0x0C | ||
32 | #define BRGACR 0x10 | ||
33 | #define BRGATXTCNT 0x14 | ||
34 | #define BRGARXTCNT 0x18 | ||
35 | |||
36 | #define ACR_RAR (1 << 18) | ||
37 | #define ACR_RDS (1 << 17) | ||
38 | #define ACR_RDE (1 << 16) | ||
39 | #define ACR_TAR (1 << 2) | ||
40 | #define ACR_TDS (1 << 1) | ||
41 | #define ACR_TDE (1 << 0) | ||
42 | |||
43 | /* receiver/transmitter data alignment */ | ||
44 | #define ACR_RAM_NONE (0 << 24) | ||
45 | #define ACR_RAM_4BYTE (1 << 24) | ||
46 | #define ACR_RAM_2WORD (2 << 24) | ||
47 | #define ACR_TAM_NONE (0 << 8) | ||
48 | #define ACR_TAM_4BYTE (1 << 8) | ||
49 | #define ACR_TAM_2WORD (2 << 8) | ||
50 | |||
51 | |||
52 | struct camelot_pcm { | ||
53 | unsigned long mmio; /* DMABRG audio channel control reg MMIO */ | ||
54 | unsigned int txid; /* ID of first DMABRG IRQ for this unit */ | ||
55 | |||
56 | struct snd_pcm_substream *tx_ss; | ||
57 | unsigned long tx_period_size; | ||
58 | unsigned int tx_period; | ||
59 | |||
60 | struct snd_pcm_substream *rx_ss; | ||
61 | unsigned long rx_period_size; | ||
62 | unsigned int rx_period; | ||
63 | |||
64 | } cam_pcm_data[2] = { | ||
65 | { | ||
66 | .mmio = 0xFE3C0040, | ||
67 | .txid = DMABRGIRQ_A0TXF, | ||
68 | }, | ||
69 | { | ||
70 | .mmio = 0xFE3C0060, | ||
71 | .txid = DMABRGIRQ_A1TXF, | ||
72 | }, | ||
73 | }; | ||
74 | |||
75 | #define BRGREG(x) (*(unsigned long *)(cam->mmio + (x))) | ||
76 | |||
77 | /* | ||
78 | * set a minimum of 16kb per period, to avoid interrupt-"storm" and | ||
79 | * resulting skipping. In general, the bigger the minimum size, the | ||
80 | * better for overall system performance. (The SH7760 is a puny CPU | ||
81 | * with a slow SDRAM interface and poor internal bus bandwidth, | ||
82 | * *especially* when the LCDC is active). The minimum for the DMAC | ||
83 | * is 8 bytes; 16kbytes are enough to get skip-free playback of a | ||
84 | * 44kHz/16bit/stereo MP3 on a lightly loaded system, and maintain | ||
85 | * reasonable responsiveness in MPlayer. | ||
86 | */ | ||
87 | #define DMABRG_PERIOD_MIN 16 * 1024 | ||
88 | #define DMABRG_PERIOD_MAX 0x03fffffc | ||
89 | #define DMABRG_PREALLOC_BUFFER 32 * 1024 | ||
90 | #define DMABRG_PREALLOC_BUFFER_MAX 32 * 1024 | ||
91 | |||
92 | /* support everything the SSI supports */ | ||
93 | #define DMABRG_RATES \ | ||
94 | SNDRV_PCM_RATE_8000_192000 | ||
95 | |||
96 | #define DMABRG_FMTS \ | ||
97 | (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \ | ||
98 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \ | ||
99 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_U20_3LE | \ | ||
100 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3LE | \ | ||
101 | SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE) | ||
102 | |||
103 | static struct snd_pcm_hardware camelot_pcm_hardware = { | ||
104 | .info = (SNDRV_PCM_INFO_MMAP | | ||
105 | SNDRV_PCM_INFO_INTERLEAVED | | ||
106 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | ||
107 | SNDRV_PCM_INFO_MMAP_VALID), | ||
108 | .formats = DMABRG_FMTS, | ||
109 | .rates = DMABRG_RATES, | ||
110 | .rate_min = 8000, | ||
111 | .rate_max = 192000, | ||
112 | .channels_min = 2, | ||
113 | .channels_max = 8, /* max of the SSI */ | ||
114 | .buffer_bytes_max = DMABRG_PERIOD_MAX, | ||
115 | .period_bytes_min = DMABRG_PERIOD_MIN, | ||
116 | .period_bytes_max = DMABRG_PERIOD_MAX / 2, | ||
117 | .periods_min = 2, | ||
118 | .periods_max = 2, | ||
119 | .fifo_size = 128, | ||
120 | }; | ||
121 | |||
122 | static void camelot_txdma(void *data) | ||
123 | { | ||
124 | struct camelot_pcm *cam = data; | ||
125 | cam->tx_period ^= 1; | ||
126 | snd_pcm_period_elapsed(cam->tx_ss); | ||
127 | } | ||
128 | |||
129 | static void camelot_rxdma(void *data) | ||
130 | { | ||
131 | struct camelot_pcm *cam = data; | ||
132 | cam->rx_period ^= 1; | ||
133 | snd_pcm_period_elapsed(cam->rx_ss); | ||
134 | } | ||
135 | |||
136 | static int camelot_pcm_open(struct snd_pcm_substream *substream) | ||
137 | { | ||
138 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
139 | struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id]; | ||
140 | int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1; | ||
141 | int ret, dmairq; | ||
142 | |||
143 | snd_soc_set_runtime_hwparams(substream, &camelot_pcm_hardware); | ||
144 | |||
145 | /* DMABRG buffer half/full events */ | ||
146 | dmairq = (recv) ? cam->txid + 2 : cam->txid; | ||
147 | if (recv) { | ||
148 | cam->rx_ss = substream; | ||
149 | ret = dmabrg_request_irq(dmairq, camelot_rxdma, cam); | ||
150 | if (unlikely(ret)) { | ||
151 | pr_debug("audio unit %d irqs already taken!\n", | ||
152 | rtd->dai->cpu_dai->id); | ||
153 | return -EBUSY; | ||
154 | } | ||
155 | (void)dmabrg_request_irq(dmairq + 1,camelot_rxdma, cam); | ||
156 | } else { | ||
157 | cam->tx_ss = substream; | ||
158 | ret = dmabrg_request_irq(dmairq, camelot_txdma, cam); | ||
159 | if (unlikely(ret)) { | ||
160 | pr_debug("audio unit %d irqs already taken!\n", | ||
161 | rtd->dai->cpu_dai->id); | ||
162 | return -EBUSY; | ||
163 | } | ||
164 | (void)dmabrg_request_irq(dmairq + 1, camelot_txdma, cam); | ||
165 | } | ||
166 | return 0; | ||
167 | } | ||
168 | |||
169 | static int camelot_pcm_close(struct snd_pcm_substream *substream) | ||
170 | { | ||
171 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
172 | struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id]; | ||
173 | int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1; | ||
174 | int dmairq; | ||
175 | |||
176 | dmairq = (recv) ? cam->txid + 2 : cam->txid; | ||
177 | |||
178 | if (recv) | ||
179 | cam->rx_ss = NULL; | ||
180 | else | ||
181 | cam->tx_ss = NULL; | ||
182 | |||
183 | dmabrg_free_irq(dmairq + 1); | ||
184 | dmabrg_free_irq(dmairq); | ||
185 | |||
186 | return 0; | ||
187 | } | ||
188 | |||
189 | static int camelot_hw_params(struct snd_pcm_substream *substream, | ||
190 | struct snd_pcm_hw_params *hw_params) | ||
191 | { | ||
192 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
193 | struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id]; | ||
194 | int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1; | ||
195 | int ret; | ||
196 | |||
197 | ret = snd_pcm_lib_malloc_pages(substream, | ||
198 | params_buffer_bytes(hw_params)); | ||
199 | if (ret < 0) | ||
200 | return ret; | ||
201 | |||
202 | if (recv) { | ||
203 | cam->rx_period_size = params_period_bytes(hw_params); | ||
204 | cam->rx_period = 0; | ||
205 | } else { | ||
206 | cam->tx_period_size = params_period_bytes(hw_params); | ||
207 | cam->tx_period = 0; | ||
208 | } | ||
209 | return 0; | ||
210 | } | ||
211 | |||
212 | static int camelot_hw_free(struct snd_pcm_substream *substream) | ||
213 | { | ||
214 | return snd_pcm_lib_free_pages(substream); | ||
215 | } | ||
216 | |||
217 | static int camelot_prepare(struct snd_pcm_substream *substream) | ||
218 | { | ||
219 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
220 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
221 | struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id]; | ||
222 | |||
223 | pr_debug("PCM data: addr 0x%08ulx len %d\n", | ||
224 | (u32)runtime->dma_addr, runtime->dma_bytes); | ||
225 | |||
226 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | ||
227 | BRGREG(BRGATXSAR) = (unsigned long)runtime->dma_area; | ||
228 | BRGREG(BRGATXTCR) = runtime->dma_bytes; | ||
229 | } else { | ||
230 | BRGREG(BRGARXDAR) = (unsigned long)runtime->dma_area; | ||
231 | BRGREG(BRGARXTCR) = runtime->dma_bytes; | ||
232 | } | ||
233 | |||
234 | return 0; | ||
235 | } | ||
236 | |||
237 | static inline void dmabrg_play_dma_start(struct camelot_pcm *cam) | ||
238 | { | ||
239 | unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS); | ||
240 | /* start DMABRG engine: XFER start, auto-addr-reload */ | ||
241 | BRGREG(BRGACR) = acr | ACR_TDE | ACR_TAR | ACR_TAM_2WORD; | ||
242 | } | ||
243 | |||
244 | static inline void dmabrg_play_dma_stop(struct camelot_pcm *cam) | ||
245 | { | ||
246 | unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS); | ||
247 | /* forcibly terminate data transmission */ | ||
248 | BRGREG(BRGACR) = acr | ACR_TDS; | ||
249 | } | ||
250 | |||
251 | static inline void dmabrg_rec_dma_start(struct camelot_pcm *cam) | ||
252 | { | ||
253 | unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS); | ||
254 | /* start DMABRG engine: recv start, auto-reload */ | ||
255 | BRGREG(BRGACR) = acr | ACR_RDE | ACR_RAR | ACR_RAM_2WORD; | ||
256 | } | ||
257 | |||
258 | static inline void dmabrg_rec_dma_stop(struct camelot_pcm *cam) | ||
259 | { | ||
260 | unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS); | ||
261 | /* forcibly terminate data receiver */ | ||
262 | BRGREG(BRGACR) = acr | ACR_RDS; | ||
263 | } | ||
264 | |||
265 | static int camelot_trigger(struct snd_pcm_substream *substream, int cmd) | ||
266 | { | ||
267 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
268 | struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id]; | ||
269 | int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1; | ||
270 | |||
271 | switch (cmd) { | ||
272 | case SNDRV_PCM_TRIGGER_START: | ||
273 | if (recv) | ||
274 | dmabrg_rec_dma_start(cam); | ||
275 | else | ||
276 | dmabrg_play_dma_start(cam); | ||
277 | break; | ||
278 | case SNDRV_PCM_TRIGGER_STOP: | ||
279 | if (recv) | ||
280 | dmabrg_rec_dma_stop(cam); | ||
281 | else | ||
282 | dmabrg_play_dma_stop(cam); | ||
283 | break; | ||
284 | default: | ||
285 | return -EINVAL; | ||
286 | } | ||
287 | |||
288 | return 0; | ||
289 | } | ||
290 | |||
291 | static snd_pcm_uframes_t camelot_pos(struct snd_pcm_substream *substream) | ||
292 | { | ||
293 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
294 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
295 | struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id]; | ||
296 | int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1; | ||
297 | unsigned long pos; | ||
298 | |||
299 | /* cannot use the DMABRG pointer register: under load, by the | ||
300 | * time ALSA comes around to read the register, it is already | ||
301 | * far ahead (or worse, already done with the fragment) of the | ||
302 | * position at the time the IRQ was triggered, which results in | ||
303 | * fast-playback sound in my test application (ScummVM) | ||
304 | */ | ||
305 | if (recv) | ||
306 | pos = cam->rx_period ? cam->rx_period_size : 0; | ||
307 | else | ||
308 | pos = cam->tx_period ? cam->tx_period_size : 0; | ||
309 | |||
310 | return bytes_to_frames(runtime, pos); | ||
311 | } | ||
312 | |||
313 | static struct snd_pcm_ops camelot_pcm_ops = { | ||
314 | .open = camelot_pcm_open, | ||
315 | .close = camelot_pcm_close, | ||
316 | .ioctl = snd_pcm_lib_ioctl, | ||
317 | .hw_params = camelot_hw_params, | ||
318 | .hw_free = camelot_hw_free, | ||
319 | .prepare = camelot_prepare, | ||
320 | .trigger = camelot_trigger, | ||
321 | .pointer = camelot_pos, | ||
322 | }; | ||
323 | |||
324 | static void camelot_pcm_free(struct snd_pcm *pcm) | ||
325 | { | ||
326 | snd_pcm_lib_preallocate_free_for_all(pcm); | ||
327 | } | ||
328 | |||
329 | static int camelot_pcm_new(struct snd_card *card, | ||
330 | struct snd_soc_codec_dai *dai, | ||
331 | struct snd_pcm *pcm) | ||
332 | { | ||
333 | /* dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel | ||
334 | * in MMAP mode (i.e. aplay -M) | ||
335 | */ | ||
336 | snd_pcm_lib_preallocate_pages_for_all(pcm, | ||
337 | SNDRV_DMA_TYPE_CONTINUOUS, | ||
338 | snd_dma_continuous_data(GFP_KERNEL), | ||
339 | DMABRG_PREALLOC_BUFFER, DMABRG_PREALLOC_BUFFER_MAX); | ||
340 | |||
341 | return 0; | ||
342 | } | ||
343 | |||
344 | struct snd_soc_platform sh7760_soc_platform = { | ||
345 | .name = "sh7760-pcm", | ||
346 | .pcm_ops = &camelot_pcm_ops, | ||
347 | .pcm_new = camelot_pcm_new, | ||
348 | .pcm_free = camelot_pcm_free, | ||
349 | }; | ||
350 | EXPORT_SYMBOL_GPL(sh7760_soc_platform); | ||
351 | |||
352 | MODULE_LICENSE("GPL"); | ||
353 | MODULE_DESCRIPTION("SH7760 Audio DMA (DMABRG) driver"); | ||
354 | MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>"); | ||
diff --git a/sound/soc/sh/hac.c b/sound/soc/sh/hac.c new file mode 100644 index 000000000000..8e3f03908cdb --- /dev/null +++ b/sound/soc/sh/hac.c | |||
@@ -0,0 +1,322 @@ | |||
1 | /* | ||
2 | * Hitachi Audio Controller (AC97) support for SH7760/SH7780 | ||
3 | * | ||
4 | * Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net> | ||
5 | * licensed under the terms outlined in the file COPYING at the root | ||
6 | * of the linux kernel sources. | ||
7 | * | ||
8 | * dont forget to set IPSEL/OMSEL register bits (in your board code) to | ||
9 | * enable HAC output pins! | ||
10 | */ | ||
11 | |||
12 | /* BIG FAT FIXME: although the SH7760 has 2 independent AC97 units, only | ||
13 | * the FIRST can be used since ASoC does not pass any information to the | ||
14 | * ac97_read/write() functions regarding WHICH unit to use. You'll have | ||
15 | * to edit the code a bit to use the other AC97 unit. --mlau | ||
16 | */ | ||
17 | |||
18 | #include <linux/init.h> | ||
19 | #include <linux/module.h> | ||
20 | #include <linux/platform_device.h> | ||
21 | #include <linux/interrupt.h> | ||
22 | #include <linux/wait.h> | ||
23 | #include <linux/delay.h> | ||
24 | #include <sound/driver.h> | ||
25 | #include <sound/core.h> | ||
26 | #include <sound/pcm.h> | ||
27 | #include <sound/ac97_codec.h> | ||
28 | #include <sound/initval.h> | ||
29 | #include <sound/soc.h> | ||
30 | |||
31 | /* regs and bits */ | ||
32 | #define HACCR 0x08 | ||
33 | #define HACCSAR 0x20 | ||
34 | #define HACCSDR 0x24 | ||
35 | #define HACPCML 0x28 | ||
36 | #define HACPCMR 0x2C | ||
37 | #define HACTIER 0x50 | ||
38 | #define HACTSR 0x54 | ||
39 | #define HACRIER 0x58 | ||
40 | #define HACRSR 0x5C | ||
41 | #define HACACR 0x60 | ||
42 | |||
43 | #define CR_CR (1 << 15) /* "codec-ready" indicator */ | ||
44 | #define CR_CDRT (1 << 11) /* cold reset */ | ||
45 | #define CR_WMRT (1 << 10) /* warm reset */ | ||
46 | #define CR_B9 (1 << 9) /* the mysterious "bit 9" */ | ||
47 | #define CR_ST (1 << 5) /* AC97 link start bit */ | ||
48 | |||
49 | #define CSAR_RD (1 << 19) /* AC97 data read bit */ | ||
50 | #define CSAR_WR (0) | ||
51 | |||
52 | #define TSR_CMDAMT (1 << 31) | ||
53 | #define TSR_CMDDMT (1 << 30) | ||
54 | |||
55 | #define RSR_STARY (1 << 22) | ||
56 | #define RSR_STDRY (1 << 21) | ||
57 | |||
58 | #define ACR_DMARX16 (1 << 30) | ||
59 | #define ACR_DMATX16 (1 << 29) | ||
60 | #define ACR_TX12ATOM (1 << 26) | ||
61 | #define ACR_DMARX20 ((1 << 24) | (1 << 22)) | ||
62 | #define ACR_DMATX20 ((1 << 23) | (1 << 21)) | ||
63 | |||
64 | #define CSDR_SHIFT 4 | ||
65 | #define CSDR_MASK (0xffff << CSDR_SHIFT) | ||
66 | #define CSAR_SHIFT 12 | ||
67 | #define CSAR_MASK (0x7f << CSAR_SHIFT) | ||
68 | |||
69 | #define AC97_WRITE_RETRY 1 | ||
70 | #define AC97_READ_RETRY 5 | ||
71 | |||
72 | /* manual-suggested AC97 codec access timeouts (us) */ | ||
73 | #define TMO_E1 500 /* 21 < E1 < 1000 */ | ||
74 | #define TMO_E2 13 /* 13 < E2 */ | ||
75 | #define TMO_E3 21 /* 21 < E3 */ | ||
76 | #define TMO_E4 500 /* 21 < E4 < 1000 */ | ||
77 | |||
78 | struct hac_priv { | ||
79 | unsigned long mmio; /* HAC base address */ | ||
80 | } hac_cpu_data[] = { | ||
81 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) | ||
82 | { | ||
83 | .mmio = 0xFE240000, | ||
84 | }, | ||
85 | { | ||
86 | .mmio = 0xFE250000, | ||
87 | }, | ||
88 | #elif defined(CONFIG_CPU_SUBTYPE_SH7780) | ||
89 | { | ||
90 | .mmio = 0xFFE40000, | ||
91 | }, | ||
92 | #else | ||
93 | #error "Unsupported SuperH SoC" | ||
94 | #endif | ||
95 | }; | ||
96 | |||
97 | #define HACREG(reg) (*(unsigned long *)(hac->mmio + (reg))) | ||
98 | |||
99 | /* | ||
100 | * AC97 read/write flow as outlined in the SH7760 manual (pages 903-906) | ||
101 | */ | ||
102 | static int hac_get_codec_data(struct hac_priv *hac, unsigned short r, | ||
103 | unsigned short *v) | ||
104 | { | ||
105 | unsigned int to1, to2, i; | ||
106 | unsigned short adr; | ||
107 | |||
108 | for (i = 0; i < AC97_READ_RETRY; ++i) { | ||
109 | *v = 0; | ||
110 | /* wait for HAC to receive something from the codec */ | ||
111 | for (to1 = TMO_E4; | ||
112 | to1 && !(HACREG(HACRSR) & RSR_STARY); | ||
113 | --to1) | ||
114 | udelay(1); | ||
115 | for (to2 = TMO_E4; | ||
116 | to2 && !(HACREG(HACRSR) & RSR_STDRY); | ||
117 | --to2) | ||
118 | udelay(1); | ||
119 | |||
120 | if (!to1 && !to2) | ||
121 | return 0; /* codec comm is down */ | ||
122 | |||
123 | adr = ((HACREG(HACCSAR) & CSAR_MASK) >> CSAR_SHIFT); | ||
124 | *v = ((HACREG(HACCSDR) & CSDR_MASK) >> CSDR_SHIFT); | ||
125 | |||
126 | HACREG(HACRSR) &= ~(RSR_STDRY | RSR_STARY); | ||
127 | |||
128 | if (r == adr) | ||
129 | break; | ||
130 | |||
131 | /* manual says: wait at least 21 usec before retrying */ | ||
132 | udelay(21); | ||
133 | } | ||
134 | HACREG(HACRSR) &= ~(RSR_STDRY | RSR_STARY); | ||
135 | return (i < AC97_READ_RETRY); | ||
136 | } | ||
137 | |||
138 | static unsigned short hac_read_codec_aux(struct hac_priv *hac, | ||
139 | unsigned short reg) | ||
140 | { | ||
141 | unsigned short val; | ||
142 | unsigned int i, to; | ||
143 | |||
144 | for (i = 0; i < AC97_READ_RETRY; i++) { | ||
145 | /* send_read_request */ | ||
146 | local_irq_disable(); | ||
147 | HACREG(HACTSR) &= ~(TSR_CMDAMT); | ||
148 | HACREG(HACCSAR) = (reg << CSAR_SHIFT) | CSAR_RD; | ||
149 | local_irq_enable(); | ||
150 | |||
151 | for (to = TMO_E3; | ||
152 | to && !(HACREG(HACTSR) & TSR_CMDAMT); | ||
153 | --to) | ||
154 | udelay(1); | ||
155 | |||
156 | HACREG(HACTSR) &= ~TSR_CMDAMT; | ||
157 | val = 0; | ||
158 | if (hac_get_codec_data(hac, reg, &val) != 0) | ||
159 | break; | ||
160 | } | ||
161 | |||
162 | if (i == AC97_READ_RETRY) | ||
163 | return ~0; | ||
164 | |||
165 | return val; | ||
166 | } | ||
167 | |||
168 | static void hac_ac97_write(struct snd_ac97 *ac97, unsigned short reg, | ||
169 | unsigned short val) | ||
170 | { | ||
171 | int unit_id = 0 /* ac97->private_data */; | ||
172 | struct hac_priv *hac = &hac_cpu_data[unit_id]; | ||
173 | unsigned int i, to; | ||
174 | /* write_codec_aux */ | ||
175 | for (i = 0; i < AC97_WRITE_RETRY; i++) { | ||
176 | /* send_write_request */ | ||
177 | local_irq_disable(); | ||
178 | HACREG(HACTSR) &= ~(TSR_CMDDMT | TSR_CMDAMT); | ||
179 | HACREG(HACCSDR) = (val << CSDR_SHIFT); | ||
180 | HACREG(HACCSAR) = (reg << CSAR_SHIFT) & (~CSAR_RD); | ||
181 | local_irq_enable(); | ||
182 | |||
183 | /* poll-wait for CMDAMT and CMDDMT */ | ||
184 | for (to = TMO_E1; | ||
185 | to && !(HACREG(HACTSR) & (TSR_CMDAMT|TSR_CMDDMT)); | ||
186 | --to) | ||
187 | udelay(1); | ||
188 | |||
189 | HACREG(HACTSR) &= ~(TSR_CMDAMT | TSR_CMDDMT); | ||
190 | if (to) | ||
191 | break; | ||
192 | /* timeout, try again */ | ||
193 | } | ||
194 | } | ||
195 | |||
196 | static unsigned short hac_ac97_read(struct snd_ac97 *ac97, | ||
197 | unsigned short reg) | ||
198 | { | ||
199 | int unit_id = 0 /* ac97->private_data */; | ||
200 | struct hac_priv *hac = &hac_cpu_data[unit_id]; | ||
201 | return hac_read_codec_aux(hac, reg); | ||
202 | } | ||
203 | |||
204 | static void hac_ac97_warmrst(struct snd_ac97 *ac97) | ||
205 | { | ||
206 | int unit_id = 0 /* ac97->private_data */; | ||
207 | struct hac_priv *hac = &hac_cpu_data[unit_id]; | ||
208 | unsigned int tmo; | ||
209 | |||
210 | HACREG(HACCR) = CR_WMRT | CR_ST | CR_B9; | ||
211 | msleep(10); | ||
212 | HACREG(HACCR) = CR_ST | CR_B9; | ||
213 | for (tmo = 1000; (tmo > 0) && !(HACREG(HACCR) & CR_CR); tmo--) | ||
214 | udelay(1); | ||
215 | |||
216 | if (!tmo) | ||
217 | printk(KERN_INFO "hac: reset: AC97 link down!\n"); | ||
218 | /* settings this bit lets us have a conversation with codec */ | ||
219 | HACREG(HACACR) |= ACR_TX12ATOM; | ||
220 | } | ||
221 | |||
222 | static void hac_ac97_coldrst(struct snd_ac97 *ac97) | ||
223 | { | ||
224 | int unit_id = 0 /* ac97->private_data */; | ||
225 | struct hac_priv *hac; | ||
226 | hac = &hac_cpu_data[unit_id]; | ||
227 | |||
228 | HACREG(HACCR) = 0; | ||
229 | HACREG(HACCR) = CR_CDRT | CR_ST | CR_B9; | ||
230 | msleep(10); | ||
231 | hac_ac97_warmrst(ac97); | ||
232 | } | ||
233 | |||
234 | struct snd_ac97_bus_ops soc_ac97_ops = { | ||
235 | .read = hac_ac97_read, | ||
236 | .write = hac_ac97_write, | ||
237 | .reset = hac_ac97_coldrst, | ||
238 | .warm_reset = hac_ac97_warmrst, | ||
239 | }; | ||
240 | EXPORT_SYMBOL_GPL(soc_ac97_ops); | ||
241 | |||
242 | static int hac_hw_params(struct snd_pcm_substream *substream, | ||
243 | struct snd_pcm_hw_params *params) | ||
244 | { | ||
245 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
246 | struct hac_priv *hac = &hac_cpu_data[rtd->dai->cpu_dai->id]; | ||
247 | int d = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1; | ||
248 | |||
249 | switch (params->msbits) { | ||
250 | case 16: | ||
251 | HACREG(HACACR) |= d ? ACR_DMARX16 : ACR_DMATX16; | ||
252 | HACREG(HACACR) &= d ? ~ACR_DMARX20 : ~ACR_DMATX20; | ||
253 | break; | ||
254 | case 20: | ||
255 | HACREG(HACACR) &= d ? ~ACR_DMARX16 : ~ACR_DMATX16; | ||
256 | HACREG(HACACR) |= d ? ACR_DMARX20 : ACR_DMATX20; | ||
257 | break; | ||
258 | default: | ||
259 | pr_debug("hac: invalid depth %d bit\n", params->msbits); | ||
260 | return -EINVAL; | ||
261 | break; | ||
262 | } | ||
263 | |||
264 | return 0; | ||
265 | } | ||
266 | |||
267 | #define AC97_RATES \ | ||
268 | SNDRV_PCM_RATE_8000_192000 | ||
269 | |||
270 | #define AC97_FMTS \ | ||
271 | SNDRV_PCM_FMTBIT_S16_LE | ||
272 | |||
273 | struct snd_soc_cpu_dai sh4_hac_dai[] = { | ||
274 | { | ||
275 | .name = "HAC0", | ||
276 | .id = 0, | ||
277 | .type = SND_SOC_DAI_AC97, | ||
278 | .playback = { | ||
279 | .rates = AC97_RATES, | ||
280 | .formats = AC97_FMTS, | ||
281 | .channels_min = 2, | ||
282 | .channels_max = 2, | ||
283 | }, | ||
284 | .capture = { | ||
285 | .rates = AC97_RATES, | ||
286 | .formats = AC97_FMTS, | ||
287 | .channels_min = 2, | ||
288 | .channels_max = 2, | ||
289 | }, | ||
290 | .ops = { | ||
291 | .hw_params = hac_hw_params, | ||
292 | }, | ||
293 | }, | ||
294 | #ifdef CONFIG_CPU_SUBTYPE_SH7760 | ||
295 | { | ||
296 | .name = "HAC1", | ||
297 | .id = 1, | ||
298 | .type = SND_SOC_DAI_AC97, | ||
299 | .playback = { | ||
300 | .rates = AC97_RATES, | ||
301 | .formats = AC97_FMTS, | ||
302 | .channels_min = 2, | ||
303 | .channels_max = 2, | ||
304 | }, | ||
305 | .capture = { | ||
306 | .rates = AC97_RATES, | ||
307 | .formats = AC97_FMTS, | ||
308 | .channels_min = 2, | ||
309 | .channels_max = 2, | ||
310 | }, | ||
311 | .ops = { | ||
312 | .hw_params = hac_hw_params, | ||
313 | }, | ||
314 | |||
315 | }, | ||
316 | #endif | ||
317 | }; | ||
318 | EXPORT_SYMBOL_GPL(sh4_hac_dai); | ||
319 | |||
320 | MODULE_LICENSE("GPL"); | ||
321 | MODULE_DESCRIPTION("SuperH onchip HAC (AC97) audio driver"); | ||
322 | MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>"); | ||
diff --git a/sound/soc/sh/sh7760-ac97.c b/sound/soc/sh/sh7760-ac97.c new file mode 100644 index 000000000000..5563f14511fa --- /dev/null +++ b/sound/soc/sh/sh7760-ac97.c | |||
@@ -0,0 +1,92 @@ | |||
1 | /* | ||
2 | * Generic AC97 sound support for SH7760 | ||
3 | * | ||
4 | * (c) 2007 Manuel Lauss | ||
5 | * | ||
6 | * Licensed under the GPLv2. | ||
7 | */ | ||
8 | |||
9 | #include <linux/module.h> | ||
10 | #include <linux/moduleparam.h> | ||
11 | #include <linux/platform_device.h> | ||
12 | #include <sound/driver.h> | ||
13 | #include <sound/core.h> | ||
14 | #include <sound/pcm.h> | ||
15 | #include <sound/soc.h> | ||
16 | #include <sound/soc-dapm.h> | ||
17 | #include <asm/io.h> | ||
18 | |||
19 | #include "../codecs/ac97.h" | ||
20 | |||
21 | #define IPSEL 0xFE400034 | ||
22 | |||
23 | /* platform specific structs can be declared here */ | ||
24 | extern struct snd_soc_cpu_dai sh4_hac_dai[2]; | ||
25 | extern struct snd_soc_platform sh7760_soc_platform; | ||
26 | |||
27 | static int machine_init(struct snd_soc_codec *codec) | ||
28 | { | ||
29 | snd_soc_dapm_sync_endpoints(codec); | ||
30 | return 0; | ||
31 | } | ||
32 | |||
33 | static struct snd_soc_dai_link sh7760_ac97_dai = { | ||
34 | .name = "AC97", | ||
35 | .stream_name = "AC97 HiFi", | ||
36 | .cpu_dai = &sh4_hac_dai[0], /* HAC0 */ | ||
37 | .codec_dai = &ac97_dai, | ||
38 | .init = machine_init, | ||
39 | .ops = NULL, | ||
40 | }; | ||
41 | |||
42 | static struct snd_soc_machine sh7760_ac97_soc_machine = { | ||
43 | .name = "SH7760 AC97", | ||
44 | .dai_link = &sh7760_ac97_dai, | ||
45 | .num_links = 1, | ||
46 | }; | ||
47 | |||
48 | static struct snd_soc_device sh7760_ac97_snd_devdata = { | ||
49 | .machine = &sh7760_ac97_soc_machine, | ||
50 | .platform = &sh7760_soc_platform, | ||
51 | .codec_dev = &soc_codec_dev_ac97, | ||
52 | }; | ||
53 | |||
54 | static struct platform_device *sh7760_ac97_snd_device; | ||
55 | |||
56 | static int __init sh7760_ac97_init(void) | ||
57 | { | ||
58 | int ret; | ||
59 | unsigned short ipsel; | ||
60 | |||
61 | /* enable both AC97 controllers in pinmux reg */ | ||
62 | ipsel = ctrl_inw(IPSEL); | ||
63 | ctrl_outw(ipsel | (3 << 10), IPSEL); | ||
64 | |||
65 | ret = -ENOMEM; | ||
66 | sh7760_ac97_snd_device = platform_device_alloc("soc-audio", -1); | ||
67 | if (!sh7760_ac97_snd_device) | ||
68 | goto out; | ||
69 | |||
70 | platform_set_drvdata(sh7760_ac97_snd_device, | ||
71 | &sh7760_ac97_snd_devdata); | ||
72 | sh7760_ac97_snd_devdata.dev = &sh7760_ac97_snd_device->dev; | ||
73 | ret = platform_device_add(sh7760_ac97_snd_device); | ||
74 | |||
75 | if (ret) | ||
76 | platform_device_put(sh7760_ac97_snd_device); | ||
77 | |||
78 | out: | ||
79 | return ret; | ||
80 | } | ||
81 | |||
82 | static void __exit sh7760_ac97_exit(void) | ||
83 | { | ||
84 | platform_device_unregister(sh7760_ac97_snd_device); | ||
85 | } | ||
86 | |||
87 | module_init(sh7760_ac97_init); | ||
88 | module_exit(sh7760_ac97_exit); | ||
89 | |||
90 | MODULE_LICENSE("GPL"); | ||
91 | MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine"); | ||
92 | MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>"); | ||
diff --git a/sound/soc/sh/ssi.c b/sound/soc/sh/ssi.c new file mode 100644 index 000000000000..b72bc316cb8e --- /dev/null +++ b/sound/soc/sh/ssi.c | |||
@@ -0,0 +1,400 @@ | |||
1 | /* | ||
2 | * Serial Sound Interface (I2S) support for SH7760/SH7780 | ||
3 | * | ||
4 | * Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net> | ||
5 | * | ||
6 | * licensed under the terms outlined in the file COPYING at the root | ||
7 | * of the linux kernel sources. | ||
8 | * | ||
9 | * dont forget to set IPSEL/OMSEL register bits (in your board code) to | ||
10 | * enable SSI output pins! | ||
11 | */ | ||
12 | |||
13 | /* | ||
14 | * LIMITATIONS: | ||
15 | * The SSI unit has only one physical data line, so full duplex is | ||
16 | * impossible. This can be remedied on the SH7760 by using the | ||
17 | * other SSI unit for recording; however the SH7780 has only 1 SSI | ||
18 | * unit, and its pins are shared with the AC97 unit, among others. | ||
19 | * | ||
20 | * FEATURES: | ||
21 | * The SSI features "compressed mode": in this mode it continuously | ||
22 | * streams PCM data over the I2S lines and uses LRCK as a handshake | ||
23 | * signal. Can be used to send compressed data (AC3/DTS) to a DSP. | ||
24 | * The number of bits sent over the wire in a frame can be adjusted | ||
25 | * and can be independent from the actual sample bit depth. This is | ||
26 | * useful to support TDM mode codecs like the AD1939 which have a | ||
27 | * fixed TDM slot size, regardless of sample resolution. | ||
28 | */ | ||
29 | |||
30 | #include <linux/init.h> | ||
31 | #include <linux/module.h> | ||
32 | #include <linux/platform_device.h> | ||
33 | #include <sound/driver.h> | ||
34 | #include <sound/core.h> | ||
35 | #include <sound/pcm.h> | ||
36 | #include <sound/initval.h> | ||
37 | #include <sound/soc.h> | ||
38 | #include <asm/io.h> | ||
39 | |||
40 | #define SSICR 0x00 | ||
41 | #define SSISR 0x04 | ||
42 | |||
43 | #define CR_DMAEN (1 << 28) | ||
44 | #define CR_CHNL_SHIFT 22 | ||
45 | #define CR_CHNL_MASK (3 << CR_CHNL_SHIFT) | ||
46 | #define CR_DWL_SHIFT 19 | ||
47 | #define CR_DWL_MASK (7 << CR_DWL_SHIFT) | ||
48 | #define CR_SWL_SHIFT 16 | ||
49 | #define CR_SWL_MASK (7 << CR_SWL_SHIFT) | ||
50 | #define CR_SCK_MASTER (1 << 15) /* bitclock master bit */ | ||
51 | #define CR_SWS_MASTER (1 << 14) /* wordselect master bit */ | ||
52 | #define CR_SCKP (1 << 13) /* I2Sclock polarity */ | ||
53 | #define CR_SWSP (1 << 12) /* LRCK polarity */ | ||
54 | #define CR_SPDP (1 << 11) | ||
55 | #define CR_SDTA (1 << 10) /* i2s alignment (msb/lsb) */ | ||
56 | #define CR_PDTA (1 << 9) /* fifo data alignment */ | ||
57 | #define CR_DEL (1 << 8) /* delay data by 1 i2sclk */ | ||
58 | #define CR_BREN (1 << 7) /* clock gating in burst mode */ | ||
59 | #define CR_CKDIV_SHIFT 4 | ||
60 | #define CR_CKDIV_MASK (7 << CR_CKDIV_SHIFT) /* bitclock divider */ | ||
61 | #define CR_MUTE (1 << 3) /* SSI mute */ | ||
62 | #define CR_CPEN (1 << 2) /* compressed mode */ | ||
63 | #define CR_TRMD (1 << 1) /* transmit/receive select */ | ||
64 | #define CR_EN (1 << 0) /* enable SSI */ | ||
65 | |||
66 | #define SSIREG(reg) (*(unsigned long *)(ssi->mmio + (reg))) | ||
67 | |||
68 | struct ssi_priv { | ||
69 | unsigned long mmio; | ||
70 | unsigned long sysclk; | ||
71 | int inuse; | ||
72 | } ssi_cpu_data[] = { | ||
73 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) | ||
74 | { | ||
75 | .mmio = 0xFE680000, | ||
76 | }, | ||
77 | { | ||
78 | .mmio = 0xFE690000, | ||
79 | }, | ||
80 | #elif defined(CONFIG_CPU_SUBTYPE_SH7780) | ||
81 | { | ||
82 | .mmio = 0xFFE70000, | ||
83 | }, | ||
84 | #else | ||
85 | #error "Unsupported SuperH SoC" | ||
86 | #endif | ||
87 | }; | ||
88 | |||
89 | /* | ||
90 | * track usage of the SSI; it is simplex-only so prevent attempts of | ||
91 | * concurrent playback + capture. FIXME: any locking required? | ||
92 | */ | ||
93 | static int ssi_startup(struct snd_pcm_substream *substream) | ||
94 | { | ||
95 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
96 | struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id]; | ||
97 | if (ssi->inuse) { | ||
98 | pr_debug("ssi: already in use!\n"); | ||
99 | return -EBUSY; | ||
100 | } else | ||
101 | ssi->inuse = 1; | ||
102 | return 0; | ||
103 | } | ||
104 | |||
105 | static void ssi_shutdown(struct snd_pcm_substream *substream) | ||
106 | { | ||
107 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
108 | struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id]; | ||
109 | |||
110 | ssi->inuse = 0; | ||
111 | } | ||
112 | |||
113 | static int ssi_trigger(struct snd_pcm_substream *substream, int cmd) | ||
114 | { | ||
115 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
116 | struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id]; | ||
117 | |||
118 | switch (cmd) { | ||
119 | case SNDRV_PCM_TRIGGER_START: | ||
120 | SSIREG(SSICR) |= CR_DMAEN | CR_EN; | ||
121 | break; | ||
122 | case SNDRV_PCM_TRIGGER_STOP: | ||
123 | SSIREG(SSICR) &= ~(CR_DMAEN | CR_EN); | ||
124 | break; | ||
125 | default: | ||
126 | return -EINVAL; | ||
127 | } | ||
128 | |||
129 | return 0; | ||
130 | } | ||
131 | |||
132 | static int ssi_hw_params(struct snd_pcm_substream *substream, | ||
133 | struct snd_pcm_hw_params *params) | ||
134 | { | ||
135 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
136 | struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id]; | ||
137 | unsigned long ssicr = SSIREG(SSICR); | ||
138 | unsigned int bits, channels, swl, recv, i; | ||
139 | |||
140 | channels = params_channels(params); | ||
141 | bits = params->msbits; | ||
142 | recv = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 0 : 1; | ||
143 | |||
144 | pr_debug("ssi_hw_params() enter\nssicr was %08lx\n", ssicr); | ||
145 | pr_debug("bits: %d channels: %d\n", bits, channels); | ||
146 | |||
147 | ssicr &= ~(CR_TRMD | CR_CHNL_MASK | CR_DWL_MASK | CR_PDTA | | ||
148 | CR_SWL_MASK); | ||
149 | |||
150 | /* direction (send/receive) */ | ||
151 | if (!recv) | ||
152 | ssicr |= CR_TRMD; /* transmit */ | ||
153 | |||
154 | /* channels */ | ||
155 | if ((channels < 2) || (channels > 8) || (channels & 1)) { | ||
156 | pr_debug("ssi: invalid number of channels\n"); | ||
157 | return -EINVAL; | ||
158 | } | ||
159 | ssicr |= ((channels >> 1) - 1) << CR_CHNL_SHIFT; | ||
160 | |||
161 | /* DATA WORD LENGTH (DWL): databits in audio sample */ | ||
162 | i = 0; | ||
163 | switch (bits) { | ||
164 | case 32: ++i; | ||
165 | case 24: ++i; | ||
166 | case 22: ++i; | ||
167 | case 20: ++i; | ||
168 | case 18: ++i; | ||
169 | case 16: ++i; | ||
170 | ssicr |= i << CR_DWL_SHIFT; | ||
171 | case 8: break; | ||
172 | default: | ||
173 | pr_debug("ssi: invalid sample width\n"); | ||
174 | return -EINVAL; | ||
175 | } | ||
176 | |||
177 | /* | ||
178 | * SYSTEM WORD LENGTH: size in bits of half a frame over the I2S | ||
179 | * wires. This is usually bits_per_sample x channels/2; i.e. in | ||
180 | * Stereo mode the SWL equals DWL. SWL can be bigger than the | ||
181 | * product of (channels_per_slot x samplebits), e.g. for codecs | ||
182 | * like the AD1939 which only accept 32bit wide TDM slots. For | ||
183 | * "standard" I2S operation we set SWL = chans / 2 * DWL here. | ||
184 | * Waiting for ASoC to get TDM support ;-) | ||
185 | */ | ||
186 | if ((bits > 16) && (bits <= 24)) { | ||
187 | bits = 24; /* these are padded by the SSI */ | ||
188 | /*ssicr |= CR_PDTA;*/ /* cpu/data endianness ? */ | ||
189 | } | ||
190 | i = 0; | ||
191 | swl = (bits * channels) / 2; | ||
192 | switch (swl) { | ||
193 | case 256: ++i; | ||
194 | case 128: ++i; | ||
195 | case 64: ++i; | ||
196 | case 48: ++i; | ||
197 | case 32: ++i; | ||
198 | case 16: ++i; | ||
199 | ssicr |= i << CR_SWL_SHIFT; | ||
200 | case 8: break; | ||
201 | default: | ||
202 | pr_debug("ssi: invalid system word length computed\n"); | ||
203 | return -EINVAL; | ||
204 | } | ||
205 | |||
206 | SSIREG(SSICR) = ssicr; | ||
207 | |||
208 | pr_debug("ssi_hw_params() leave\nssicr is now %08lx\n", ssicr); | ||
209 | return 0; | ||
210 | } | ||
211 | |||
212 | static int ssi_set_sysclk(struct snd_soc_cpu_dai *cpu_dai, int clk_id, | ||
213 | unsigned int freq, int dir) | ||
214 | { | ||
215 | struct ssi_priv *ssi = &ssi_cpu_data[cpu_dai->id]; | ||
216 | |||
217 | ssi->sysclk = freq; | ||
218 | |||
219 | return 0; | ||
220 | } | ||
221 | |||
222 | /* | ||
223 | * This divider is used to generate the SSI_SCK (I2S bitclock) from the | ||
224 | * clock at the HAC_BIT_CLK ("oversampling clock") pin. | ||
225 | */ | ||
226 | static int ssi_set_clkdiv(struct snd_soc_cpu_dai *dai, int did, int div) | ||
227 | { | ||
228 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; | ||
229 | unsigned long ssicr; | ||
230 | int i; | ||
231 | |||
232 | i = 0; | ||
233 | ssicr = SSIREG(SSICR) & ~CR_CKDIV_MASK; | ||
234 | switch (div) { | ||
235 | case 16: ++i; | ||
236 | case 8: ++i; | ||
237 | case 4: ++i; | ||
238 | case 2: ++i; | ||
239 | SSIREG(SSICR) = ssicr | (i << CR_CKDIV_SHIFT); | ||
240 | case 1: break; | ||
241 | default: | ||
242 | pr_debug("ssi: invalid sck divider %d\n", div); | ||
243 | return -EINVAL; | ||
244 | } | ||
245 | |||
246 | return 0; | ||
247 | } | ||
248 | |||
249 | static int ssi_set_fmt(struct snd_soc_cpu_dai *dai, unsigned int fmt) | ||
250 | { | ||
251 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; | ||
252 | unsigned long ssicr = SSIREG(SSICR); | ||
253 | |||
254 | pr_debug("ssi_set_fmt()\nssicr was 0x%08lx\n", ssicr); | ||
255 | |||
256 | ssicr &= ~(CR_DEL | CR_PDTA | CR_BREN | CR_SWSP | CR_SCKP | | ||
257 | CR_SWS_MASTER | CR_SCK_MASTER); | ||
258 | |||
259 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | ||
260 | case SND_SOC_DAIFMT_I2S: | ||
261 | break; | ||
262 | case SND_SOC_DAIFMT_RIGHT_J: | ||
263 | ssicr |= CR_DEL | CR_PDTA; | ||
264 | break; | ||
265 | case SND_SOC_DAIFMT_LEFT_J: | ||
266 | ssicr |= CR_DEL; | ||
267 | break; | ||
268 | default: | ||
269 | pr_debug("ssi: unsupported format\n"); | ||
270 | return -EINVAL; | ||
271 | } | ||
272 | |||
273 | switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) { | ||
274 | case SND_SOC_DAIFMT_CONT: | ||
275 | break; | ||
276 | case SND_SOC_DAIFMT_GATED: | ||
277 | ssicr |= CR_BREN; | ||
278 | break; | ||
279 | } | ||
280 | |||
281 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | ||
282 | case SND_SOC_DAIFMT_NB_NF: | ||
283 | ssicr |= CR_SCKP; /* sample data at low clkedge */ | ||
284 | break; | ||
285 | case SND_SOC_DAIFMT_NB_IF: | ||
286 | ssicr |= CR_SCKP | CR_SWSP; | ||
287 | break; | ||
288 | case SND_SOC_DAIFMT_IB_NF: | ||
289 | break; | ||
290 | case SND_SOC_DAIFMT_IB_IF: | ||
291 | ssicr |= CR_SWSP; /* word select starts low */ | ||
292 | break; | ||
293 | default: | ||
294 | pr_debug("ssi: invalid inversion\n"); | ||
295 | return -EINVAL; | ||
296 | } | ||
297 | |||
298 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | ||
299 | case SND_SOC_DAIFMT_CBM_CFM: | ||
300 | break; | ||
301 | case SND_SOC_DAIFMT_CBS_CFM: | ||
302 | ssicr |= CR_SCK_MASTER; | ||
303 | break; | ||
304 | case SND_SOC_DAIFMT_CBM_CFS: | ||
305 | ssicr |= CR_SWS_MASTER; | ||
306 | break; | ||
307 | case SND_SOC_DAIFMT_CBS_CFS: | ||
308 | ssicr |= CR_SWS_MASTER | CR_SCK_MASTER; | ||
309 | break; | ||
310 | default: | ||
311 | pr_debug("ssi: invalid master/slave configuration\n"); | ||
312 | return -EINVAL; | ||
313 | } | ||
314 | |||
315 | SSIREG(SSICR) = ssicr; | ||
316 | pr_debug("ssi_set_fmt() leave\nssicr is now 0x%08lx\n", ssicr); | ||
317 | |||
318 | return 0; | ||
319 | } | ||
320 | |||
321 | /* the SSI depends on an external clocksource (at HAC_BIT_CLK) even in | ||
322 | * Master mode, so really this is board specific; the SSI can do any | ||
323 | * rate with the right bitclk and divider settings. | ||
324 | */ | ||
325 | #define SSI_RATES \ | ||
326 | SNDRV_PCM_RATE_8000_192000 | ||
327 | |||
328 | /* the SSI can do 8-32 bit samples, with 8 possible channels */ | ||
329 | #define SSI_FMTS \ | ||
330 | (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \ | ||
331 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \ | ||
332 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_U20_3LE | \ | ||
333 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3LE | \ | ||
334 | SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE) | ||
335 | |||
336 | struct snd_soc_cpu_dai sh4_ssi_dai[] = { | ||
337 | { | ||
338 | .name = "SSI0", | ||
339 | .id = 0, | ||
340 | .type = SND_SOC_DAI_I2S, | ||
341 | .playback = { | ||
342 | .rates = SSI_RATES, | ||
343 | .formats = SSI_FMTS, | ||
344 | .channels_min = 2, | ||
345 | .channels_max = 8, | ||
346 | }, | ||
347 | .capture = { | ||
348 | .rates = SSI_RATES, | ||
349 | .formats = SSI_FMTS, | ||
350 | .channels_min = 2, | ||
351 | .channels_max = 8, | ||
352 | }, | ||
353 | .ops = { | ||
354 | .startup = ssi_startup, | ||
355 | .shutdown = ssi_shutdown, | ||
356 | .trigger = ssi_trigger, | ||
357 | .hw_params = ssi_hw_params, | ||
358 | }, | ||
359 | .dai_ops = { | ||
360 | .set_sysclk = ssi_set_sysclk, | ||
361 | .set_clkdiv = ssi_set_clkdiv, | ||
362 | .set_fmt = ssi_set_fmt, | ||
363 | }, | ||
364 | }, | ||
365 | #ifdef CONFIG_CPU_SUBTYPE_SH7760 | ||
366 | { | ||
367 | .name = "SSI1", | ||
368 | .id = 1, | ||
369 | .type = SND_SOC_DAI_I2S, | ||
370 | .playback = { | ||
371 | .rates = SSI_RATES, | ||
372 | .formats = SSI_FMTS, | ||
373 | .channels_min = 2, | ||
374 | .channels_max = 8, | ||
375 | }, | ||
376 | .capture = { | ||
377 | .rates = SSI_RATES, | ||
378 | .formats = SSI_FMTS, | ||
379 | .channels_min = 2, | ||
380 | .channels_max = 8, | ||
381 | }, | ||
382 | .ops = { | ||
383 | .startup = ssi_startup, | ||
384 | .shutdown = ssi_shutdown, | ||
385 | .trigger = ssi_trigger, | ||
386 | .hw_params = ssi_hw_params, | ||
387 | }, | ||
388 | .dai_ops = { | ||
389 | .set_sysclk = ssi_set_sysclk, | ||
390 | .set_clkdiv = ssi_set_clkdiv, | ||
391 | .set_fmt = ssi_set_fmt, | ||
392 | }, | ||
393 | }, | ||
394 | #endif | ||
395 | }; | ||
396 | EXPORT_SYMBOL_GPL(sh4_ssi_dai); | ||
397 | |||
398 | MODULE_LICENSE("GPL"); | ||
399 | MODULE_DESCRIPTION("SuperH onchip SSI (I2S) audio driver"); | ||
400 | MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>"); | ||