~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/txx9/txx9aclc-ac97.c

Version: ~ [ linux-5.9.1 ] ~ [ linux-5.8.16 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.72 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.152 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.202 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.240 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.240 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * TXx9 ACLC AC97 driver
  4  *
  5  * Copyright (C) 2009 Atsushi Nemoto
  6  *
  7  * Based on RBTX49xx patch from CELF patch archive.
  8  * (C) Copyright TOSHIBA CORPORATION 2004-2006
  9  */
 10 
 11 #include <linux/init.h>
 12 #include <linux/module.h>
 13 #include <linux/delay.h>
 14 #include <linux/interrupt.h>
 15 #include <linux/io.h>
 16 #include <linux/gfp.h>
 17 #include <sound/core.h>
 18 #include <sound/pcm.h>
 19 #include <sound/soc.h>
 20 #include "txx9aclc.h"
 21 
 22 #define AC97_DIR        \
 23         (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
 24 
 25 #define AC97_RATES      \
 26         SNDRV_PCM_RATE_8000_48000
 27 
 28 #ifdef __BIG_ENDIAN
 29 #define AC97_FMTS       SNDRV_PCM_FMTBIT_S16_BE
 30 #else
 31 #define AC97_FMTS       SNDRV_PCM_FMTBIT_S16_LE
 32 #endif
 33 
 34 static DECLARE_WAIT_QUEUE_HEAD(ac97_waitq);
 35 
 36 /* REVISIT: How to find txx9aclc_drvdata from snd_ac97? */
 37 static struct txx9aclc_plat_drvdata *txx9aclc_drvdata;
 38 
 39 static int txx9aclc_regready(struct txx9aclc_plat_drvdata *drvdata)
 40 {
 41         return __raw_readl(drvdata->base + ACINTSTS) & ACINT_REGACCRDY;
 42 }
 43 
 44 /* AC97 controller reads codec register */
 45 static unsigned short txx9aclc_ac97_read(struct snd_ac97 *ac97,
 46                                          unsigned short reg)
 47 {
 48         struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
 49         void __iomem *base = drvdata->base;
 50         u32 dat;
 51 
 52         if (!(__raw_readl(base + ACINTSTS) & ACINT_CODECRDY(ac97->num)))
 53                 return 0xffff;
 54         reg |= ac97->num << 7;
 55         dat = (reg << ACREGACC_REG_SHIFT) | ACREGACC_READ;
 56         __raw_writel(dat, base + ACREGACC);
 57         __raw_writel(ACINT_REGACCRDY, base + ACINTEN);
 58         if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
 59                 __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
 60                 printk(KERN_ERR "ac97 read timeout (reg %#x)\n", reg);
 61                 dat = 0xffff;
 62                 goto done;
 63         }
 64         dat = __raw_readl(base + ACREGACC);
 65         if (((dat >> ACREGACC_REG_SHIFT) & 0xff) != reg) {
 66                 printk(KERN_ERR "reg mismatch %x with %x\n",
 67                         dat, reg);
 68                 dat = 0xffff;
 69                 goto done;
 70         }
 71         dat = (dat >> ACREGACC_DAT_SHIFT) & 0xffff;
 72 done:
 73         __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
 74         return dat;
 75 }
 76 
 77 /* AC97 controller writes to codec register */
 78 static void txx9aclc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 79                                 unsigned short val)
 80 {
 81         struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
 82         void __iomem *base = drvdata->base;
 83 
 84         __raw_writel(((reg | (ac97->num << 7)) << ACREGACC_REG_SHIFT) |
 85                      (val << ACREGACC_DAT_SHIFT),
 86                      base + ACREGACC);
 87         __raw_writel(ACINT_REGACCRDY, base + ACINTEN);
 88         if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
 89                 printk(KERN_ERR
 90                         "ac97 write timeout (reg %#x)\n", reg);
 91         }
 92         __raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
 93 }
 94 
 95 static void txx9aclc_ac97_cold_reset(struct snd_ac97 *ac97)
 96 {
 97         struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
 98         void __iomem *base = drvdata->base;
 99         u32 ready = ACINT_CODECRDY(ac97->num) | ACINT_REGACCRDY;
100 
101         __raw_writel(ACCTL_ENLINK, base + ACCTLDIS);
102         udelay(1);
103         __raw_writel(ACCTL_ENLINK, base + ACCTLEN);
104         /* wait for primary codec ready status */
105         __raw_writel(ready, base + ACINTEN);
106         if (!wait_event_timeout(ac97_waitq,
107                                 (__raw_readl(base + ACINTSTS) & ready) == ready,
108                                 HZ)) {
109                 dev_err(&ac97->dev, "primary codec is not ready "
110                         "(status %#x)\n",
111                         __raw_readl(base + ACINTSTS));
112         }
113         __raw_writel(ACINT_REGACCRDY, base + ACINTSTS);
114         __raw_writel(ready, base + ACINTDIS);
115 }
116 
117 /* AC97 controller operations */
118 static struct snd_ac97_bus_ops txx9aclc_ac97_ops = {
119         .read           = txx9aclc_ac97_read,
120         .write          = txx9aclc_ac97_write,
121         .reset          = txx9aclc_ac97_cold_reset,
122 };
123 
124 static irqreturn_t txx9aclc_ac97_irq(int irq, void *dev_id)
125 {
126         struct txx9aclc_plat_drvdata *drvdata = dev_id;
127         void __iomem *base = drvdata->base;
128 
129         __raw_writel(__raw_readl(base + ACINTMSTS), base + ACINTDIS);
130         wake_up(&ac97_waitq);
131         return IRQ_HANDLED;
132 }
133 
134 static int txx9aclc_ac97_probe(struct snd_soc_dai *dai)
135 {
136         txx9aclc_drvdata = snd_soc_dai_get_drvdata(dai);
137         return 0;
138 }
139 
140 static int txx9aclc_ac97_remove(struct snd_soc_dai *dai)
141 {
142         struct txx9aclc_plat_drvdata *drvdata = snd_soc_dai_get_drvdata(dai);
143 
144         /* disable AC-link */
145         __raw_writel(ACCTL_ENLINK, drvdata->base + ACCTLDIS);
146         txx9aclc_drvdata = NULL;
147         return 0;
148 }
149 
150 static struct snd_soc_dai_driver txx9aclc_ac97_dai = {
151         .bus_control            = true,
152         .probe                  = txx9aclc_ac97_probe,
153         .remove                 = txx9aclc_ac97_remove,
154         .playback = {
155                 .rates          = AC97_RATES,
156                 .formats        = AC97_FMTS,
157                 .channels_min   = 2,
158                 .channels_max   = 2,
159         },
160         .capture = {
161                 .rates          = AC97_RATES,
162                 .formats        = AC97_FMTS,
163                 .channels_min   = 2,
164                 .channels_max   = 2,
165         },
166 };
167 
168 static const struct snd_soc_component_driver txx9aclc_ac97_component = {
169         .name           = "txx9aclc-ac97",
170 };
171 
172 static int txx9aclc_ac97_dev_probe(struct platform_device *pdev)
173 {
174         struct txx9aclc_plat_drvdata *drvdata;
175         struct resource *r;
176         int err;
177         int irq;
178 
179         irq = platform_get_irq(pdev, 0);
180         if (irq < 0)
181                 return irq;
182 
183         drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
184         if (!drvdata)
185                 return -ENOMEM;
186 
187         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
188         drvdata->base = devm_ioremap_resource(&pdev->dev, r);
189         if (IS_ERR(drvdata->base))
190                 return PTR_ERR(drvdata->base);
191 
192         platform_set_drvdata(pdev, drvdata);
193         drvdata->physbase = r->start;
194         if (sizeof(drvdata->physbase) > sizeof(r->start) &&
195             r->start >= TXX9_DIRECTMAP_BASE &&
196             r->start < TXX9_DIRECTMAP_BASE + 0x400000)
197                 drvdata->physbase |= 0xf00000000ull;
198         err = devm_request_irq(&pdev->dev, irq, txx9aclc_ac97_irq,
199                                0, dev_name(&pdev->dev), drvdata);
200         if (err < 0)
201                 return err;
202 
203         err = snd_soc_set_ac97_ops(&txx9aclc_ac97_ops);
204         if (err < 0)
205                 return err;
206 
207         return devm_snd_soc_register_component(&pdev->dev, &txx9aclc_ac97_component,
208                                           &txx9aclc_ac97_dai, 1);
209 }
210 
211 static int txx9aclc_ac97_dev_remove(struct platform_device *pdev)
212 {
213         snd_soc_set_ac97_ops(NULL);
214         return 0;
215 }
216 
217 static struct platform_driver txx9aclc_ac97_driver = {
218         .probe          = txx9aclc_ac97_dev_probe,
219         .remove         = txx9aclc_ac97_dev_remove,
220         .driver         = {
221                 .name   = "txx9aclc-ac97",
222         },
223 };
224 
225 module_platform_driver(txx9aclc_ac97_driver);
226 
227 MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
228 MODULE_DESCRIPTION("TXx9 ACLC AC97 driver");
229 MODULE_LICENSE("GPL");
230 MODULE_ALIAS("platform:txx9aclc-ac97");
231 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp