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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
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
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
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
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
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
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");
256
