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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 <linux/gfp.h>
20#include <sound/core.h>
21#include <sound/pcm.h>
22#include <sound/soc.h>
23#include "txx9aclc.h"
24
25#define AC97_DIR \
26 (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
27
28#define AC97_RATES \
29 SNDRV_PCM_RATE_8000_48000
30
31#ifdef __BIG_ENDIAN
32#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_BE
33#else
34#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_LE
35#endif
36
37static DECLARE_WAIT_QUEUE_HEAD(ac97_waitq);
38
39
40static struct txx9aclc_plat_drvdata *txx9aclc_drvdata;
41
42static int txx9aclc_regready(struct txx9aclc_plat_drvdata *drvdata)
43{
44 return __raw_readl(drvdata->base + ACINTSTS) & ACINT_REGACCRDY;
45}
46
47
48static unsigned short txx9aclc_ac97_read(struct snd_ac97 *ac97,
49 unsigned short reg)
50{
51 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
52 void __iomem *base = drvdata->base;
53 u32 dat;
54
55 if (!(__raw_readl(base + ACINTSTS) & ACINT_CODECRDY(ac97->num)))
56 return 0xffff;
57 reg |= ac97->num << 7;
58 dat = (reg << ACREGACC_REG_SHIFT) | ACREGACC_READ;
59 __raw_writel(dat, base + ACREGACC);
60 __raw_writel(ACINT_REGACCRDY, base + ACINTEN);
61 if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
62 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
63 printk(KERN_ERR "ac97 read timeout (reg %#x)\n", reg);
64 dat = 0xffff;
65 goto done;
66 }
67 dat = __raw_readl(base + ACREGACC);
68 if (((dat >> ACREGACC_REG_SHIFT) & 0xff) != reg) {
69 printk(KERN_ERR "reg mismatch %x with %x\n",
70 dat, reg);
71 dat = 0xffff;
72 goto done;
73 }
74 dat = (dat >> ACREGACC_DAT_SHIFT) & 0xffff;
75done:
76 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
77 return dat;
78}
79
80
81static void txx9aclc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
82 unsigned short val)
83{
84 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
85 void __iomem *base = drvdata->base;
86
87 __raw_writel(((reg | (ac97->num << 7)) << ACREGACC_REG_SHIFT) |
88 (val << ACREGACC_DAT_SHIFT),
89 base + ACREGACC);
90 __raw_writel(ACINT_REGACCRDY, base + ACINTEN);
91 if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
92 printk(KERN_ERR
93 "ac97 write timeout (reg %#x)\n", reg);
94 }
95 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
96}
97
98static void txx9aclc_ac97_cold_reset(struct snd_ac97 *ac97)
99{
100 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
101 void __iomem *base = drvdata->base;
102 u32 ready = ACINT_CODECRDY(ac97->num) | ACINT_REGACCRDY;
103
104 __raw_writel(ACCTL_ENLINK, base + ACCTLDIS);
105 mmiowb();
106 udelay(1);
107 __raw_writel(ACCTL_ENLINK, base + ACCTLEN);
108
109 __raw_writel(ready, base + ACINTEN);
110 if (!wait_event_timeout(ac97_waitq,
111 (__raw_readl(base + ACINTSTS) & ready) == ready,
112 HZ)) {
113 dev_err(&ac97->dev, "primary codec is not ready "
114 "(status %#x)\n",
115 __raw_readl(base + ACINTSTS));
116 }
117 __raw_writel(ACINT_REGACCRDY, base + ACINTSTS);
118 __raw_writel(ready, base + ACINTDIS);
119}
120
121
122struct snd_ac97_bus_ops soc_ac97_ops = {
123 .read = txx9aclc_ac97_read,
124 .write = txx9aclc_ac97_write,
125 .reset = txx9aclc_ac97_cold_reset,
126};
127EXPORT_SYMBOL_GPL(soc_ac97_ops);
128
129static irqreturn_t txx9aclc_ac97_irq(int irq, void *dev_id)
130{
131 struct txx9aclc_plat_drvdata *drvdata = dev_id;
132 void __iomem *base = drvdata->base;
133
134 __raw_writel(__raw_readl(base + ACINTMSTS), base + ACINTDIS);
135 wake_up(&ac97_waitq);
136 return IRQ_HANDLED;
137}
138
139static int txx9aclc_ac97_probe(struct snd_soc_dai *dai)
140{
141 txx9aclc_drvdata = snd_soc_dai_get_drvdata(dai);
142 return 0;
143}
144
145static int txx9aclc_ac97_remove(struct snd_soc_dai *dai)
146{
147 struct txx9aclc_plat_drvdata *drvdata = snd_soc_dai_get_drvdata(dai);
148
149
150 __raw_writel(ACCTL_ENLINK, drvdata->base + ACCTLDIS);
151 txx9aclc_drvdata = NULL;
152 return 0;
153}
154
155static struct snd_soc_dai_driver txx9aclc_ac97_dai = {
156 .ac97_control = 1,
157 .probe = txx9aclc_ac97_probe,
158 .remove = txx9aclc_ac97_remove,
159 .playback = {
160 .rates = AC97_RATES,
161 .formats = AC97_FMTS,
162 .channels_min = 2,
163 .channels_max = 2,
164 },
165 .capture = {
166 .rates = AC97_RATES,
167 .formats = AC97_FMTS,
168 .channels_min = 2,
169 .channels_max = 2,
170 },
171};
172
173static int __devinit txx9aclc_ac97_dev_probe(struct platform_device *pdev)
174{
175 struct txx9aclc_plat_drvdata *drvdata;
176 struct resource *r;
177 int err;
178 int irq;
179
180 irq = platform_get_irq(pdev, 0);
181 if (irq < 0)
182 return irq;
183 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
184 if (!r)
185 return -EBUSY;
186
187 if (!devm_request_mem_region(&pdev->dev, r->start, resource_size(r),
188 dev_name(&pdev->dev)))
189 return -EBUSY;
190
191 drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
192 if (!drvdata)
193 return -ENOMEM;
194 platform_set_drvdata(pdev, drvdata);
195 drvdata->physbase = r->start;
196 if (sizeof(drvdata->physbase) > sizeof(r->start) &&
197 r->start >= TXX9_DIRECTMAP_BASE &&
198 r->start < TXX9_DIRECTMAP_BASE + 0x400000)
199 drvdata->physbase |= 0xf00000000ull;
200 drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
201 if (!drvdata->base)
202 return -EBUSY;
203 err = devm_request_irq(&pdev->dev, irq, txx9aclc_ac97_irq,
204 IRQF_DISABLED, dev_name(&pdev->dev), drvdata);
205 if (err < 0)
206 return err;
207
208 return snd_soc_register_dai(&pdev->dev, &txx9aclc_ac97_dai);
209}
210
211static int __devexit txx9aclc_ac97_dev_remove(struct platform_device *pdev)
212{
213 snd_soc_unregister_dai(&pdev->dev);
214 return 0;
215}
216
217static struct platform_driver txx9aclc_ac97_driver = {
218 .probe = txx9aclc_ac97_dev_probe,
219 .remove = __devexit_p(txx9aclc_ac97_dev_remove),
220 .driver = {
221 .name = "txx9aclc-ac97",
222 .owner = THIS_MODULE,
223 },
224};
225
226static int __init txx9aclc_ac97_init(void)
227{
228 return platform_driver_register(&txx9aclc_ac97_driver);
229}
230
231static void __exit txx9aclc_ac97_exit(void)
232{
233 platform_driver_unregister(&txx9aclc_ac97_driver);
234}
235
236module_init(txx9aclc_ac97_init);
237module_exit(txx9aclc_ac97_exit);
238
239MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
240MODULE_DESCRIPTION("TXx9 ACLC AC97 driver");
241MODULE_LICENSE("GPL");
242MODULE_ALIAS("platform:txx9aclc-ac97");
243
