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Atsushi Nemotoe24805d2009-05-19 22:12:15 +09001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090019#include <linux/gfp.h>
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090020#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
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000039/* REVISIT: How to find txx9aclc_drvdata from snd_ac97? */
40static struct txx9aclc_plat_drvdata *txx9aclc_drvdata;
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090041
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000042static int txx9aclc_regready(struct txx9aclc_plat_drvdata *drvdata)
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090043{
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090044 return __raw_readl(drvdata->base + ACINTSTS) & ACINT_REGACCRDY;
45}
46
47/* AC97 controller reads codec register */
48static unsigned short txx9aclc_ac97_read(struct snd_ac97 *ac97,
49 unsigned short reg)
50{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000051 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090052 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);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000061 if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090062 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000063 printk(KERN_ERR "ac97 read timeout (reg %#x)\n", reg);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090064 dat = 0xffff;
65 goto done;
66 }
67 dat = __raw_readl(base + ACREGACC);
68 if (((dat >> ACREGACC_REG_SHIFT) & 0xff) != reg) {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000069 printk(KERN_ERR "reg mismatch %x with %x\n",
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090070 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/* AC97 controller writes to codec register */
81static void txx9aclc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
82 unsigned short val)
83{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000084 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090085 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);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000091 if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
92 printk(KERN_ERR
Atsushi Nemotoe24805d2009-05-19 22:12:15 +090093 "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{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000100 struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900101 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 /* wait for primary codec ready status */
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/* AC97 controller operations */
Mark Brownb047e1c2013-06-26 12:45:59 +0100122static struct snd_ac97_bus_ops txx9aclc_ac97_ops = {
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900123 .read = txx9aclc_ac97_read,
124 .write = txx9aclc_ac97_write,
125 .reset = txx9aclc_ac97_cold_reset,
126};
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900127
128static irqreturn_t txx9aclc_ac97_irq(int irq, void *dev_id)
129{
130 struct txx9aclc_plat_drvdata *drvdata = dev_id;
131 void __iomem *base = drvdata->base;
132
133 __raw_writel(__raw_readl(base + ACINTMSTS), base + ACINTDIS);
134 wake_up(&ac97_waitq);
135 return IRQ_HANDLED;
136}
137
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000138static int txx9aclc_ac97_probe(struct snd_soc_dai *dai)
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900139{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000140 txx9aclc_drvdata = snd_soc_dai_get_drvdata(dai);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900141 return 0;
142}
143
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000144static int txx9aclc_ac97_remove(struct snd_soc_dai *dai)
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900145{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000146 struct txx9aclc_plat_drvdata *drvdata = snd_soc_dai_get_drvdata(dai);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900147
148 /* disable AC-link */
149 __raw_writel(ACCTL_ENLINK, drvdata->base + ACCTLDIS);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000150 txx9aclc_drvdata = NULL;
151 return 0;
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900152}
153
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000154static struct snd_soc_dai_driver txx9aclc_ac97_dai = {
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900155 .ac97_control = 1,
156 .probe = txx9aclc_ac97_probe,
157 .remove = txx9aclc_ac97_remove,
158 .playback = {
159 .rates = AC97_RATES,
160 .formats = AC97_FMTS,
161 .channels_min = 2,
162 .channels_max = 2,
163 },
164 .capture = {
165 .rates = AC97_RATES,
166 .formats = AC97_FMTS,
167 .channels_min = 2,
168 .channels_max = 2,
169 },
170};
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900171
Kuninori Morimotob00e2fa2013-03-21 03:38:07 -0700172static const struct snd_soc_component_driver txx9aclc_ac97_component = {
173 .name = "txx9aclc-ac97",
174};
175
Bill Pembertond8628d12012-12-07 09:26:34 -0500176static int txx9aclc_ac97_dev_probe(struct platform_device *pdev)
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900177{
178 struct txx9aclc_plat_drvdata *drvdata;
179 struct resource *r;
180 int err;
181 int irq;
182
183 irq = platform_get_irq(pdev, 0);
184 if (irq < 0)
185 return irq;
Alexander Shiyan9febd492014-02-15 23:28:29 +0400186
187 drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
188 if (!drvdata)
189 return -ENOMEM;
190
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900191 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Mark Brown3bed3342013-06-26 12:40:47 +0100192 drvdata->base = devm_ioremap_resource(&pdev->dev, r);
193 if (IS_ERR(drvdata->base))
194 return PTR_ERR(drvdata->base);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900195
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900196 platform_set_drvdata(pdev, drvdata);
197 drvdata->physbase = r->start;
198 if (sizeof(drvdata->physbase) > sizeof(r->start) &&
199 r->start >= TXX9_DIRECTMAP_BASE &&
200 r->start < TXX9_DIRECTMAP_BASE + 0x400000)
201 drvdata->physbase |= 0xf00000000ull;
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900202 err = devm_request_irq(&pdev->dev, irq, txx9aclc_ac97_irq,
Yong Zhang88e24c32011-09-22 16:59:20 +0800203 0, dev_name(&pdev->dev), drvdata);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900204 if (err < 0)
205 return err;
206
Mark Brownb047e1c2013-06-26 12:45:59 +0100207 err = snd_soc_set_ac97_ops(&txx9aclc_ac97_ops);
208 if (err < 0)
209 return err;
210
Kuninori Morimotob00e2fa2013-03-21 03:38:07 -0700211 return snd_soc_register_component(&pdev->dev, &txx9aclc_ac97_component,
212 &txx9aclc_ac97_dai, 1);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900213}
214
Bill Pembertond8628d12012-12-07 09:26:34 -0500215static int txx9aclc_ac97_dev_remove(struct platform_device *pdev)
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900216{
Kuninori Morimotob00e2fa2013-03-21 03:38:07 -0700217 snd_soc_unregister_component(&pdev->dev);
Mark Brownb047e1c2013-06-26 12:45:59 +0100218 snd_soc_set_ac97_ops(NULL);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900219 return 0;
220}
221
222static struct platform_driver txx9aclc_ac97_driver = {
223 .probe = txx9aclc_ac97_dev_probe,
Bill Pembertond8628d12012-12-07 09:26:34 -0500224 .remove = txx9aclc_ac97_dev_remove,
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900225 .driver = {
226 .name = "txx9aclc-ac97",
227 .owner = THIS_MODULE,
228 },
229};
230
Axel Lin33d316c2011-11-25 10:16:10 +0800231module_platform_driver(txx9aclc_ac97_driver);
Atsushi Nemotoe24805d2009-05-19 22:12:15 +0900232
233MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
234MODULE_DESCRIPTION("TXx9 ACLC AC97 driver");
235MODULE_LICENSE("GPL");
Geert Uytterhoevenb0b4ce32010-04-08 20:52:00 +0200236MODULE_ALIAS("platform:txx9aclc-ac97");