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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2009-05-19 09:12:15 -0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-05-19 14:54:28 -0400
commite24805dd85283ac0912b9c400768a4d171b400ff (patch)
treee67bb07cab9358ac46f77bff9f5a0aef490271a5 /sound/soc/txx9
parent11a728110633320d95935a1ba79c038db303596f (diff)
ASoC: Add TXx9 AC link controller driver (v3)
This patch adds support for the integrated ACLC of the TXx9 family. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/txx9')
-rw-r--r--sound/soc/txx9/Kconfig29
-rw-r--r--sound/soc/txx9/Makefile11
-rw-r--r--sound/soc/txx9/txx9aclc-ac97.c255
-rw-r--r--sound/soc/txx9/txx9aclc-generic.c98
-rw-r--r--sound/soc/txx9/txx9aclc.c430
-rw-r--r--sound/soc/txx9/txx9aclc.h83
6 files changed, 906 insertions, 0 deletions
diff --git a/sound/soc/txx9/Kconfig b/sound/soc/txx9/Kconfig
new file mode 100644
index 000000000000..ebc9327eae71
--- /dev/null
+++ b/sound/soc/txx9/Kconfig
@@ -0,0 +1,29 @@
1##
2## TXx9 ACLC
3##
4config SND_SOC_TXX9ACLC
5 tristate "SoC Audio for TXx9"
6 depends on HAS_TXX9_ACLC && TXX9_DMAC
7 help
8 This option enables support for the AC Link Controllers in TXx9 SoC.
9
10config HAS_TXX9_ACLC
11 bool
12
13config SND_SOC_TXX9ACLC_AC97
14 tristate
15 select AC97_BUS
16 select SND_AC97_CODEC
17 select SND_SOC_AC97_BUS
18
19
20##
21## Boards
22##
23config SND_SOC_TXX9ACLC_GENERIC
24 tristate "Generic TXx9 ACLC sound machine"
25 depends on SND_SOC_TXX9ACLC
26 select SND_SOC_TXX9ACLC_AC97
27 select SND_SOC_AC97_CODEC
28 help
29 This is a generic AC97 sound machine for use in TXx9 based systems.
diff --git a/sound/soc/txx9/Makefile b/sound/soc/txx9/Makefile
new file mode 100644
index 000000000000..551f16c0c4f9
--- /dev/null
+++ b/sound/soc/txx9/Makefile
@@ -0,0 +1,11 @@
1# Platform
2snd-soc-txx9aclc-objs := txx9aclc.o
3snd-soc-txx9aclc-ac97-objs := txx9aclc-ac97.o
4
5obj-$(CONFIG_SND_SOC_TXX9ACLC) += snd-soc-txx9aclc.o
6obj-$(CONFIG_SND_SOC_TXX9ACLC_AC97) += snd-soc-txx9aclc-ac97.o
7
8# Machine
9snd-soc-txx9aclc-generic-objs := txx9aclc-generic.o
10
11obj-$(CONFIG_SND_SOC_TXX9ACLC_GENERIC) += snd-soc-txx9aclc-generic.o
diff --git a/sound/soc/txx9/txx9aclc-ac97.c b/sound/soc/txx9/txx9aclc-ac97.c
new file mode 100644
index 000000000000..0f83bdb9b16f
--- /dev/null
+++ b/sound/soc/txx9/txx9aclc-ac97.c
@@ -0,0 +1,255 @@
1/*
2 * TXx9 ACLC AC97 driver
3 *
4 * Copyright (C) 2009 Atsushi Nemoto
5 *
6 * Based on RBTX49xx patch from CELF patch archive.
7 * (C) Copyright TOSHIBA CORPORATION 2004-2006
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/init.h>
15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/interrupt.h>
18#include <linux/io.h>
19#include <sound/core.h>
20#include <sound/pcm.h>
21#include <sound/soc.h>
22#include "txx9aclc.h"
23
24#define AC97_DIR \
25 (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
26
27#define AC97_RATES \
28 SNDRV_PCM_RATE_8000_48000
29
30#ifdef __BIG_ENDIAN
31#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_BE
32#else
33#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_LE
34#endif
35
36static DECLARE_WAIT_QUEUE_HEAD(ac97_waitq);
37
38/* REVISIT: How to find txx9aclc_soc_device from snd_ac97? */
39static struct txx9aclc_soc_device *txx9aclc_soc_dev;
40
41static int txx9aclc_regready(struct txx9aclc_soc_device *dev)
42{
43 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
44
45 return __raw_readl(drvdata->base + ACINTSTS) & ACINT_REGACCRDY;
46}
47
48/* AC97 controller reads codec register */
49static unsigned short txx9aclc_ac97_read(struct snd_ac97 *ac97,
50 unsigned short reg)
51{
52 struct txx9aclc_soc_device *dev = txx9aclc_soc_dev;
53 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
54 void __iomem *base = drvdata->base;
55 u32 dat;
56
57 if (!(__raw_readl(base + ACINTSTS) & ACINT_CODECRDY(ac97->num)))
58 return 0xffff;
59 reg |= ac97->num << 7;
60 dat = (reg << ACREGACC_REG_SHIFT) | ACREGACC_READ;
61 __raw_writel(dat, base + ACREGACC);
62 __raw_writel(ACINT_REGACCRDY, base + ACINTEN);
63 if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(dev), HZ)) {
64 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
65 dev_err(dev->soc_dev.dev, "ac97 read timeout (reg %#x)\n", reg);
66 dat = 0xffff;
67 goto done;
68 }
69 dat = __raw_readl(base + ACREGACC);
70 if (((dat >> ACREGACC_REG_SHIFT) & 0xff) != reg) {
71 dev_err(dev->soc_dev.dev, "reg mismatch %x with %x\n",
72 dat, reg);
73 dat = 0xffff;
74 goto done;
75 }
76 dat = (dat >> ACREGACC_DAT_SHIFT) & 0xffff;
77done:
78 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
79 return dat;
80}
81
82/* AC97 controller writes to codec register */
83static void txx9aclc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
84 unsigned short val)
85{
86 struct txx9aclc_soc_device *dev = txx9aclc_soc_dev;
87 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
88 void __iomem *base = drvdata->base;
89
90 __raw_writel(((reg | (ac97->num << 7)) << ACREGACC_REG_SHIFT) |
91 (val << ACREGACC_DAT_SHIFT),
92 base + ACREGACC);
93 __raw_writel(ACINT_REGACCRDY, base + ACINTEN);
94 if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(dev), HZ)) {
95 dev_err(dev->soc_dev.dev,
96 "ac97 write timeout (reg %#x)\n", reg);
97 }
98 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
99}
100
101static void txx9aclc_ac97_cold_reset(struct snd_ac97 *ac97)
102{
103 struct txx9aclc_soc_device *dev = txx9aclc_soc_dev;
104 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
105 void __iomem *base = drvdata->base;
106 u32 ready = ACINT_CODECRDY(ac97->num) | ACINT_REGACCRDY;
107
108 __raw_writel(ACCTL_ENLINK, base + ACCTLDIS);
109 mmiowb();
110 udelay(1);
111 __raw_writel(ACCTL_ENLINK, base + ACCTLEN);
112 /* wait for primary codec ready status */
113 __raw_writel(ready, base + ACINTEN);
114 if (!wait_event_timeout(ac97_waitq,
115 (__raw_readl(base + ACINTSTS) & ready) == ready,
116 HZ)) {
117 dev_err(&ac97->dev, "primary codec is not ready "
118 "(status %#x)\n",
119 __raw_readl(base + ACINTSTS));
120 }
121 __raw_writel(ACINT_REGACCRDY, base + ACINTSTS);
122 __raw_writel(ready, base + ACINTDIS);
123}
124
125/* AC97 controller operations */
126struct snd_ac97_bus_ops soc_ac97_ops = {
127 .read = txx9aclc_ac97_read,
128 .write = txx9aclc_ac97_write,
129 .reset = txx9aclc_ac97_cold_reset,
130};
131EXPORT_SYMBOL_GPL(soc_ac97_ops);
132
133static irqreturn_t txx9aclc_ac97_irq(int irq, void *dev_id)
134{
135 struct txx9aclc_plat_drvdata *drvdata = dev_id;
136 void __iomem *base = drvdata->base;
137
138 __raw_writel(__raw_readl(base + ACINTMSTS), base + ACINTDIS);
139 wake_up(&ac97_waitq);
140 return IRQ_HANDLED;
141}
142
143static int txx9aclc_ac97_probe(struct platform_device *pdev,
144 struct snd_soc_dai *dai)
145{
146 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
147 struct txx9aclc_soc_device *dev =
148 container_of(socdev, struct txx9aclc_soc_device, soc_dev);
149
150 dev->aclc_pdev = to_platform_device(dai->dev);
151 txx9aclc_soc_dev = dev;
152 return 0;
153}
154
155static void txx9aclc_ac97_remove(struct platform_device *pdev,
156 struct snd_soc_dai *dai)
157{
158 struct platform_device *aclc_pdev = to_platform_device(dai->dev);
159 struct txx9aclc_plat_drvdata *drvdata = platform_get_drvdata(aclc_pdev);
160
161 /* disable AC-link */
162 __raw_writel(ACCTL_ENLINK, drvdata->base + ACCTLDIS);
163 txx9aclc_soc_dev = NULL;
164}
165
166struct snd_soc_dai txx9aclc_ac97_dai = {
167 .name = "txx9aclc_ac97",
168 .ac97_control = 1,
169 .probe = txx9aclc_ac97_probe,
170 .remove = txx9aclc_ac97_remove,
171 .playback = {
172 .rates = AC97_RATES,
173 .formats = AC97_FMTS,
174 .channels_min = 2,
175 .channels_max = 2,
176 },
177 .capture = {
178 .rates = AC97_RATES,
179 .formats = AC97_FMTS,
180 .channels_min = 2,
181 .channels_max = 2,
182 },
183};
184EXPORT_SYMBOL_GPL(txx9aclc_ac97_dai);
185
186static int __devinit txx9aclc_ac97_dev_probe(struct platform_device *pdev)
187{
188 struct txx9aclc_plat_drvdata *drvdata;
189 struct resource *r;
190 int err;
191 int irq;
192
193 irq = platform_get_irq(pdev, 0);
194 if (irq < 0)
195 return irq;
196 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
197 if (!r)
198 return -EBUSY;
199
200 if (!devm_request_mem_region(&pdev->dev, r->start, resource_size(r),
201 dev_name(&pdev->dev)))
202 return -EBUSY;
203
204 drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
205 if (!drvdata)
206 return -ENOMEM;
207 platform_set_drvdata(pdev, drvdata);
208 drvdata->physbase = r->start;
209 if (sizeof(drvdata->physbase) > sizeof(r->start) &&
210 r->start >= TXX9_DIRECTMAP_BASE &&
211 r->start < TXX9_DIRECTMAP_BASE + 0x400000)
212 drvdata->physbase |= 0xf00000000ull;
213 drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
214 if (!drvdata->base)
215 return -EBUSY;
216 err = devm_request_irq(&pdev->dev, irq, txx9aclc_ac97_irq,
217 IRQF_DISABLED, dev_name(&pdev->dev), drvdata);
218 if (err < 0)
219 return err;
220
221 txx9aclc_ac97_dai.dev = &pdev->dev;
222 return snd_soc_register_dai(&txx9aclc_ac97_dai);
223}
224
225static int __devexit txx9aclc_ac97_dev_remove(struct platform_device *pdev)
226{
227 snd_soc_unregister_dai(&txx9aclc_ac97_dai);
228 return 0;
229}
230
231static struct platform_driver txx9aclc_ac97_driver = {
232 .probe = txx9aclc_ac97_dev_probe,
233 .remove = __devexit_p(txx9aclc_ac97_dev_remove),
234 .driver = {
235 .name = "txx9aclc-ac97",
236 .owner = THIS_MODULE,
237 },
238};
239
240static int __init txx9aclc_ac97_init(void)
241{
242 return platform_driver_register(&txx9aclc_ac97_driver);
243}
244
245static void __exit txx9aclc_ac97_exit(void)
246{
247 platform_driver_unregister(&txx9aclc_ac97_driver);
248}
249
250module_init(txx9aclc_ac97_init);
251module_exit(txx9aclc_ac97_exit);
252
253MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
254MODULE_DESCRIPTION("TXx9 ACLC AC97 driver");
255MODULE_LICENSE("GPL");
diff --git a/sound/soc/txx9/txx9aclc-generic.c b/sound/soc/txx9/txx9aclc-generic.c
new file mode 100644
index 000000000000..3175de9a92cb
--- /dev/null
+++ b/sound/soc/txx9/txx9aclc-generic.c
@@ -0,0 +1,98 @@
1/*
2 * Generic TXx9 ACLC machine driver
3 *
4 * Copyright (C) 2009 Atsushi Nemoto
5 *
6 * Based on RBTX49xx patch from CELF patch archive.
7 * (C) Copyright TOSHIBA CORPORATION 2004-2006
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This is a very generic AC97 sound machine driver for boards which
14 * have (AC97) audio at ACLC (e.g. RBTX49XX boards).
15 */
16
17#include <linux/module.h>
18#include <linux/platform_device.h>
19#include <sound/core.h>
20#include <sound/pcm.h>
21#include <sound/soc.h>
22#include "../codecs/ac97.h"
23#include "txx9aclc.h"
24
25static struct snd_soc_dai_link txx9aclc_generic_dai = {
26 .name = "AC97",
27 .stream_name = "AC97 HiFi",
28 .cpu_dai = &txx9aclc_ac97_dai,
29 .codec_dai = &ac97_dai,
30};
31
32static struct snd_soc_card txx9aclc_generic_card = {
33 .name = "Generic TXx9 ACLC Audio",
34 .platform = &txx9aclc_soc_platform,
35 .dai_link = &txx9aclc_generic_dai,
36 .num_links = 1,
37};
38
39static struct txx9aclc_soc_device txx9aclc_generic_soc_device = {
40 .soc_dev = {
41 .card = &txx9aclc_generic_card,
42 .codec_dev = &soc_codec_dev_ac97,
43 },
44};
45
46static int __init txx9aclc_generic_probe(struct platform_device *pdev)
47{
48 struct txx9aclc_soc_device *dev = &txx9aclc_generic_soc_device;
49 struct platform_device *soc_pdev;
50 int ret;
51
52 soc_pdev = platform_device_alloc("soc-audio", -1);
53 if (!soc_pdev)
54 return -ENOMEM;
55 platform_set_drvdata(soc_pdev, &dev->soc_dev);
56 dev->soc_dev.dev = &soc_pdev->dev;
57 ret = platform_device_add(soc_pdev);
58 if (ret) {
59 platform_device_put(soc_pdev);
60 return ret;
61 }
62 platform_set_drvdata(pdev, soc_pdev);
63 return 0;
64}
65
66static int __exit txx9aclc_generic_remove(struct platform_device *pdev)
67{
68 struct platform_device *soc_pdev = platform_get_drvdata(pdev);
69
70 platform_device_unregister(soc_pdev);
71 return 0;
72}
73
74static struct platform_driver txx9aclc_generic_driver = {
75 .remove = txx9aclc_generic_remove,
76 .driver = {
77 .name = "txx9aclc-generic",
78 .owner = THIS_MODULE,
79 },
80};
81
82static int __init txx9aclc_generic_init(void)
83{
84 return platform_driver_probe(&txx9aclc_generic_driver,
85 txx9aclc_generic_probe);
86}
87
88static void __exit txx9aclc_generic_exit(void)
89{
90 platform_driver_unregister(&txx9aclc_generic_driver);
91}
92
93module_init(txx9aclc_generic_init);
94module_exit(txx9aclc_generic_exit);
95
96MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
97MODULE_DESCRIPTION("Generic TXx9 ACLC ALSA SoC audio driver");
98MODULE_LICENSE("GPL");
diff --git a/sound/soc/txx9/txx9aclc.c b/sound/soc/txx9/txx9aclc.c
new file mode 100644
index 000000000000..fa336616152e
--- /dev/null
+++ b/sound/soc/txx9/txx9aclc.c
@@ -0,0 +1,430 @@
1/*
2 * Generic TXx9 ACLC platform driver
3 *
4 * Copyright (C) 2009 Atsushi Nemoto
5 *
6 * Based on RBTX49xx patch from CELF patch archive.
7 * (C) Copyright TOSHIBA CORPORATION 2004-2006
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/platform_device.h>
17#include <linux/scatterlist.h>
18#include <sound/core.h>
19#include <sound/pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/soc.h>
22#include "txx9aclc.h"
23
24static const struct snd_pcm_hardware txx9aclc_pcm_hardware = {
25 /*
26 * REVISIT: SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID
27 * needs more works for noncoherent MIPS.
28 */
29 .info = SNDRV_PCM_INFO_INTERLEAVED |
30 SNDRV_PCM_INFO_BATCH |
31 SNDRV_PCM_INFO_PAUSE,
32#ifdef __BIG_ENDIAN
33 .formats = SNDRV_PCM_FMTBIT_S16_BE,
34#else
35 .formats = SNDRV_PCM_FMTBIT_S16_LE,
36#endif
37 .period_bytes_min = 1024,
38 .period_bytes_max = 8 * 1024,
39 .periods_min = 2,
40 .periods_max = 4096,
41 .buffer_bytes_max = 32 * 1024,
42};
43
44static int txx9aclc_pcm_hw_params(struct snd_pcm_substream *substream,
45 struct snd_pcm_hw_params *params)
46{
47 struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
48 struct snd_soc_device *socdev = rtd->socdev;
49 struct snd_pcm_runtime *runtime = substream->runtime;
50 struct txx9aclc_dmadata *dmadata = runtime->private_data;
51 int ret;
52
53 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
54 if (ret < 0)
55 return ret;
56
57 dev_dbg(socdev->dev,
58 "runtime->dma_area = %#lx dma_addr = %#lx dma_bytes = %zd "
59 "runtime->min_align %ld\n",
60 (unsigned long)runtime->dma_area,
61 (unsigned long)runtime->dma_addr, runtime->dma_bytes,
62 runtime->min_align);
63 dev_dbg(socdev->dev,
64 "periods %d period_bytes %d stream %d\n",
65 params_periods(params), params_period_bytes(params),
66 substream->stream);
67
68 dmadata->substream = substream;
69 dmadata->pos = 0;
70 return 0;
71}
72
73static int txx9aclc_pcm_hw_free(struct snd_pcm_substream *substream)
74{
75 return snd_pcm_lib_free_pages(substream);
76}
77
78static int txx9aclc_pcm_prepare(struct snd_pcm_substream *substream)
79{
80 struct snd_pcm_runtime *runtime = substream->runtime;
81 struct txx9aclc_dmadata *dmadata = runtime->private_data;
82
83 dmadata->dma_addr = runtime->dma_addr;
84 dmadata->buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
85 dmadata->period_bytes = snd_pcm_lib_period_bytes(substream);
86
87 if (dmadata->buffer_bytes == dmadata->period_bytes) {
88 dmadata->frag_bytes = dmadata->period_bytes >> 1;
89 dmadata->frags = 2;
90 } else {
91 dmadata->frag_bytes = dmadata->period_bytes;
92 dmadata->frags = dmadata->buffer_bytes / dmadata->period_bytes;
93 }
94 dmadata->frag_count = 0;
95 dmadata->pos = 0;
96 return 0;
97}
98
99static void txx9aclc_dma_complete(void *arg)
100{
101 struct txx9aclc_dmadata *dmadata = arg;
102 unsigned long flags;
103
104 /* dma completion handler cannot submit new operations */
105 spin_lock_irqsave(&dmadata->dma_lock, flags);
106 if (dmadata->frag_count >= 0) {
107 dmadata->dmacount--;
108 BUG_ON(dmadata->dmacount < 0);
109 tasklet_schedule(&dmadata->tasklet);
110 }
111 spin_unlock_irqrestore(&dmadata->dma_lock, flags);
112}
113
114static struct dma_async_tx_descriptor *
115txx9aclc_dma_submit(struct txx9aclc_dmadata *dmadata, dma_addr_t buf_dma_addr)
116{
117 struct dma_chan *chan = dmadata->dma_chan;
118 struct dma_async_tx_descriptor *desc;
119 struct scatterlist sg;
120
121 sg_init_table(&sg, 1);
122 sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf_dma_addr)),
123 dmadata->frag_bytes, buf_dma_addr & (PAGE_SIZE - 1));
124 sg_dma_address(&sg) = buf_dma_addr;
125 desc = chan->device->device_prep_slave_sg(chan, &sg, 1,
126 dmadata->substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
127 DMA_TO_DEVICE : DMA_FROM_DEVICE,
128 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
129 if (!desc) {
130 dev_err(&chan->dev->device, "cannot prepare slave dma\n");
131 return NULL;
132 }
133 desc->callback = txx9aclc_dma_complete;
134 desc->callback_param = dmadata;
135 desc->tx_submit(desc);
136 return desc;
137}
138
139#define NR_DMA_CHAIN 2
140
141static void txx9aclc_dma_tasklet(unsigned long data)
142{
143 struct txx9aclc_dmadata *dmadata = (struct txx9aclc_dmadata *)data;
144 struct dma_chan *chan = dmadata->dma_chan;
145 struct dma_async_tx_descriptor *desc;
146 struct snd_pcm_substream *substream = dmadata->substream;
147 u32 ctlbit = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
148 ACCTL_AUDODMA : ACCTL_AUDIDMA;
149 int i;
150 unsigned long flags;
151
152 spin_lock_irqsave(&dmadata->dma_lock, flags);
153 if (dmadata->frag_count < 0) {
154 struct txx9aclc_soc_device *dev =
155 container_of(dmadata, struct txx9aclc_soc_device,
156 dmadata[substream->stream]);
157 struct txx9aclc_plat_drvdata *drvdata =
158 txx9aclc_get_plat_drvdata(dev);
159 void __iomem *base = drvdata->base;
160
161 spin_unlock_irqrestore(&dmadata->dma_lock, flags);
162 chan->device->device_terminate_all(chan);
163 /* first time */
164 for (i = 0; i < NR_DMA_CHAIN; i++) {
165 desc = txx9aclc_dma_submit(dmadata,
166 dmadata->dma_addr + i * dmadata->frag_bytes);
167 if (!desc)
168 return;
169 }
170 dmadata->dmacount = NR_DMA_CHAIN;
171 chan->device->device_issue_pending(chan);
172 spin_lock_irqsave(&dmadata->dma_lock, flags);
173 __raw_writel(ctlbit, base + ACCTLEN);
174 dmadata->frag_count = NR_DMA_CHAIN % dmadata->frags;
175 spin_unlock_irqrestore(&dmadata->dma_lock, flags);
176 return;
177 }
178 BUG_ON(dmadata->dmacount >= NR_DMA_CHAIN);
179 while (dmadata->dmacount < NR_DMA_CHAIN) {
180 dmadata->dmacount++;
181 spin_unlock_irqrestore(&dmadata->dma_lock, flags);
182 desc = txx9aclc_dma_submit(dmadata,
183 dmadata->dma_addr +
184 dmadata->frag_count * dmadata->frag_bytes);
185 if (!desc)
186 return;
187 chan->device->device_issue_pending(chan);
188
189 spin_lock_irqsave(&dmadata->dma_lock, flags);
190 dmadata->frag_count++;
191 dmadata->frag_count %= dmadata->frags;
192 dmadata->pos += dmadata->frag_bytes;
193 dmadata->pos %= dmadata->buffer_bytes;
194 if ((dmadata->frag_count * dmadata->frag_bytes) %
195 dmadata->period_bytes == 0)
196 snd_pcm_period_elapsed(substream);
197 }
198 spin_unlock_irqrestore(&dmadata->dma_lock, flags);
199}
200
201static int txx9aclc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
202{
203 struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
204 struct snd_soc_pcm_runtime *rtd = substream->private_data;
205 struct txx9aclc_soc_device *dev =
206 container_of(rtd->socdev, struct txx9aclc_soc_device, soc_dev);
207 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
208 void __iomem *base = drvdata->base;
209 unsigned long flags;
210 int ret = 0;
211 u32 ctlbit = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
212 ACCTL_AUDODMA : ACCTL_AUDIDMA;
213
214 spin_lock_irqsave(&dmadata->dma_lock, flags);
215 switch (cmd) {
216 case SNDRV_PCM_TRIGGER_START:
217 dmadata->frag_count = -1;
218 tasklet_schedule(&dmadata->tasklet);
219 break;
220 case SNDRV_PCM_TRIGGER_STOP:
221 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
222 case SNDRV_PCM_TRIGGER_SUSPEND:
223 __raw_writel(ctlbit, base + ACCTLDIS);
224 break;
225 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
226 case SNDRV_PCM_TRIGGER_RESUME:
227 __raw_writel(ctlbit, base + ACCTLEN);
228 break;
229 default:
230 ret = -EINVAL;
231 }
232 spin_unlock_irqrestore(&dmadata->dma_lock, flags);
233 return ret;
234}
235
236static snd_pcm_uframes_t
237txx9aclc_pcm_pointer(struct snd_pcm_substream *substream)
238{
239 struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
240
241 return bytes_to_frames(substream->runtime, dmadata->pos);
242}
243
244static int txx9aclc_pcm_open(struct snd_pcm_substream *substream)
245{
246 struct snd_soc_pcm_runtime *rtd = substream->private_data;
247 struct txx9aclc_soc_device *dev =
248 container_of(rtd->socdev, struct txx9aclc_soc_device, soc_dev);
249 struct txx9aclc_dmadata *dmadata = &dev->dmadata[substream->stream];
250 int ret;
251
252 ret = snd_soc_set_runtime_hwparams(substream, &txx9aclc_pcm_hardware);
253 if (ret)
254 return ret;
255 /* ensure that buffer size is a multiple of period size */
256 ret = snd_pcm_hw_constraint_integer(substream->runtime,
257 SNDRV_PCM_HW_PARAM_PERIODS);
258 if (ret < 0)
259 return ret;
260 substream->runtime->private_data = dmadata;
261 return 0;
262}
263
264static int txx9aclc_pcm_close(struct snd_pcm_substream *substream)
265{
266 struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
267 struct dma_chan *chan = dmadata->dma_chan;
268
269 dmadata->frag_count = -1;
270 chan->device->device_terminate_all(chan);
271 return 0;
272}
273
274static struct snd_pcm_ops txx9aclc_pcm_ops = {
275 .open = txx9aclc_pcm_open,
276 .close = txx9aclc_pcm_close,
277 .ioctl = snd_pcm_lib_ioctl,
278 .hw_params = txx9aclc_pcm_hw_params,
279 .hw_free = txx9aclc_pcm_hw_free,
280 .prepare = txx9aclc_pcm_prepare,
281 .trigger = txx9aclc_pcm_trigger,
282 .pointer = txx9aclc_pcm_pointer,
283};
284
285static void txx9aclc_pcm_free_dma_buffers(struct snd_pcm *pcm)
286{
287 snd_pcm_lib_preallocate_free_for_all(pcm);
288}
289
290static int txx9aclc_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
291 struct snd_pcm *pcm)
292{
293 return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
294 card->dev, 64 * 1024, 4 * 1024 * 1024);
295}
296
297static bool filter(struct dma_chan *chan, void *param)
298{
299 struct txx9aclc_dmadata *dmadata = param;
300 char devname[BUS_ID_SIZE + 2];
301
302 sprintf(devname, "%s.%d", dmadata->dma_res->name,
303 (int)dmadata->dma_res->start);
304 if (strcmp(dev_name(chan->device->dev), devname) == 0) {
305 chan->private = &dmadata->dma_slave;
306 return true;
307 }
308 return false;
309}
310
311static int txx9aclc_dma_init(struct txx9aclc_soc_device *dev,
312 struct txx9aclc_dmadata *dmadata)
313{
314 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
315 struct txx9dmac_slave *ds = &dmadata->dma_slave;
316 dma_cap_mask_t mask;
317
318 spin_lock_init(&dmadata->dma_lock);
319
320 ds->reg_width = sizeof(u32);
321 if (dmadata->stream == SNDRV_PCM_STREAM_PLAYBACK) {
322 ds->tx_reg = drvdata->physbase + ACAUDODAT;
323 ds->rx_reg = 0;
324 } else {
325 ds->tx_reg = 0;
326 ds->rx_reg = drvdata->physbase + ACAUDIDAT;
327 }
328
329 /* Try to grab a DMA channel */
330 dma_cap_zero(mask);
331 dma_cap_set(DMA_SLAVE, mask);
332 dmadata->dma_chan = dma_request_channel(mask, filter, dmadata);
333 if (!dmadata->dma_chan) {
334 dev_err(dev->soc_dev.dev,
335 "DMA channel for %s is not available\n",
336 dmadata->stream == SNDRV_PCM_STREAM_PLAYBACK ?
337 "playback" : "capture");
338 return -EBUSY;
339 }
340 tasklet_init(&dmadata->tasklet, txx9aclc_dma_tasklet,
341 (unsigned long)dmadata);
342 return 0;
343}
344
345static int txx9aclc_pcm_probe(struct platform_device *pdev)
346{
347 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
348 struct txx9aclc_soc_device *dev =
349 container_of(socdev, struct txx9aclc_soc_device, soc_dev);
350 struct resource *r;
351 int i;
352 int ret;
353
354 dev->dmadata[0].stream = SNDRV_PCM_STREAM_PLAYBACK;
355 dev->dmadata[1].stream = SNDRV_PCM_STREAM_CAPTURE;
356 for (i = 0; i < 2; i++) {
357 r = platform_get_resource(dev->aclc_pdev, IORESOURCE_DMA, i);
358 if (!r) {
359 ret = -EBUSY;
360 goto exit;
361 }
362 dev->dmadata[i].dma_res = r;
363 ret = txx9aclc_dma_init(dev, &dev->dmadata[i]);
364 if (ret)
365 goto exit;
366 }
367 return 0;
368
369exit:
370 for (i = 0; i < 2; i++) {
371 if (dev->dmadata[i].dma_chan)
372 dma_release_channel(dev->dmadata[i].dma_chan);
373 dev->dmadata[i].dma_chan = NULL;
374 }
375 return ret;
376}
377
378static int txx9aclc_pcm_remove(struct platform_device *pdev)
379{
380 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
381 struct txx9aclc_soc_device *dev =
382 container_of(socdev, struct txx9aclc_soc_device, soc_dev);
383 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
384 void __iomem *base = drvdata->base;
385 int i;
386
387 /* disable all FIFO DMAs */
388 __raw_writel(ACCTL_AUDODMA | ACCTL_AUDIDMA, base + ACCTLDIS);
389 /* dummy R/W to clear pending DMAREQ if any */
390 __raw_writel(__raw_readl(base + ACAUDIDAT), base + ACAUDODAT);
391
392 for (i = 0; i < 2; i++) {
393 struct txx9aclc_dmadata *dmadata = &dev->dmadata[i];
394 struct dma_chan *chan = dmadata->dma_chan;
395 if (chan) {
396 dmadata->frag_count = -1;
397 chan->device->device_terminate_all(chan);
398 dma_release_channel(chan);
399 }
400 dev->dmadata[i].dma_chan = NULL;
401 }
402 return 0;
403}
404
405struct snd_soc_platform txx9aclc_soc_platform = {
406 .name = "txx9aclc-audio",
407 .probe = txx9aclc_pcm_probe,
408 .remove = txx9aclc_pcm_remove,
409 .pcm_ops = &txx9aclc_pcm_ops,
410 .pcm_new = txx9aclc_pcm_new,
411 .pcm_free = txx9aclc_pcm_free_dma_buffers,
412};
413EXPORT_SYMBOL_GPL(txx9aclc_soc_platform);
414
415static int __init txx9aclc_soc_platform_init(void)
416{
417 return snd_soc_register_platform(&txx9aclc_soc_platform);
418}
419
420static void __exit txx9aclc_soc_platform_exit(void)
421{
422 snd_soc_unregister_platform(&txx9aclc_soc_platform);
423}
424
425module_init(txx9aclc_soc_platform_init);
426module_exit(txx9aclc_soc_platform_exit);
427
428MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
429MODULE_DESCRIPTION("TXx9 ACLC Audio DMA driver");
430MODULE_LICENSE("GPL");
diff --git a/sound/soc/txx9/txx9aclc.h b/sound/soc/txx9/txx9aclc.h
new file mode 100644
index 000000000000..6769aab41b33
--- /dev/null
+++ b/sound/soc/txx9/txx9aclc.h
@@ -0,0 +1,83 @@
1/*
2 * TXx9 SoC AC Link Controller
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#ifndef __TXX9ACLC_H
10#define __TXX9ACLC_H
11
12#include <linux/interrupt.h>
13#include <asm/txx9/dmac.h>
14
15#define ACCTLEN 0x00 /* control enable */
16#define ACCTLDIS 0x04 /* control disable */
17#define ACCTL_ENLINK 0x00000001 /* enable/disable AC-link */
18#define ACCTL_AUDODMA 0x00000100 /* AUDODMA enable/disable */
19#define ACCTL_AUDIDMA 0x00001000 /* AUDIDMA enable/disable */
20#define ACCTL_AUDOEHLT 0x00010000 /* AUDO error halt
21 enable/disable */
22#define ACCTL_AUDIEHLT 0x00100000 /* AUDI error halt
23 enable/disable */
24#define ACREGACC 0x08 /* codec register access */
25#define ACREGACC_DAT_SHIFT 0 /* data field */
26#define ACREGACC_REG_SHIFT 16 /* address field */
27#define ACREGACC_CODECID_SHIFT 24 /* CODEC ID field */
28#define ACREGACC_READ 0x80000000 /* CODEC read */
29#define ACREGACC_WRITE 0x00000000 /* CODEC write */
30#define ACINTSTS 0x10 /* interrupt status */
31#define ACINTMSTS 0x14 /* interrupt masked status */
32#define ACINTEN 0x18 /* interrupt enable */
33#define ACINTDIS 0x1c /* interrupt disable */
34#define ACINT_CODECRDY(n) (0x00000001 << (n)) /* CODECn ready */
35#define ACINT_REGACCRDY 0x00000010 /* ACREGACC ready */
36#define ACINT_AUDOERR 0x00000100 /* AUDO underrun error */
37#define ACINT_AUDIERR 0x00001000 /* AUDI overrun error */
38#define ACDMASTS 0x80 /* DMA request status */
39#define ACDMA_AUDO 0x00000001 /* AUDODMA pending */
40#define ACDMA_AUDI 0x00000010 /* AUDIDMA pending */
41#define ACAUDODAT 0xa0 /* audio out data */
42#define ACAUDIDAT 0xb0 /* audio in data */
43#define ACREVID 0xfc /* revision ID */
44
45struct txx9aclc_dmadata {
46 struct resource *dma_res;
47 struct txx9dmac_slave dma_slave;
48 struct dma_chan *dma_chan;
49 struct tasklet_struct tasklet;
50 spinlock_t dma_lock;
51 int stream; /* SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE */
52 struct snd_pcm_substream *substream;
53 unsigned long pos;
54 dma_addr_t dma_addr;
55 unsigned long buffer_bytes;
56 unsigned long period_bytes;
57 unsigned long frag_bytes;
58 int frags;
59 int frag_count;
60 int dmacount;
61};
62
63struct txx9aclc_plat_drvdata {
64 void __iomem *base;
65 u64 physbase;
66};
67
68struct txx9aclc_soc_device {
69 struct snd_soc_device soc_dev;
70 struct platform_device *aclc_pdev; /* for ioresources, drvdata */
71 struct txx9aclc_dmadata dmadata[2];
72};
73
74static inline struct txx9aclc_plat_drvdata *txx9aclc_get_plat_drvdata(
75 struct txx9aclc_soc_device *sdev)
76{
77 return platform_get_drvdata(sdev->aclc_pdev);
78}
79
80extern struct snd_soc_platform txx9aclc_soc_platform;
81extern struct snd_soc_dai txx9aclc_ac97_dai;
82
83#endif /* __TXX9ACLC_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-20 10:47:36 -0500