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Diffstat (limited to 'sound/i2c/cs8427.c')
-rw-r--r--sound/i2c/cs8427.c217
1 files changed, 132 insertions, 85 deletions
diff --git a/sound/i2c/cs8427.c b/sound/i2c/cs8427.c
index cb89f7eb923..7e21621e492 100644
--- a/sound/i2c/cs8427.c
+++ b/sound/i2c/cs8427.c
@@ -1,7 +1,7 @@
/*
* Routines for control of the CS8427 via i2c bus
* IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* This program is free software; you can redistribute it and/or modify
@@ -20,10 +20,12 @@
*
*/
-#include <sound/driver.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
+#include <linux/bitrev.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
@@ -32,7 +34,7 @@
static void snd_cs8427_reset(struct snd_i2c_device *cs8427);
-MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic");
MODULE_LICENSE("GPL");
@@ -55,18 +57,6 @@ struct cs8427 {
struct cs8427_stream capture;
};
-static unsigned char swapbits(unsigned char val)
-{
- int bit;
- unsigned char res = 0;
- for (bit = 0; bit < 8; bit++) {
- res <<= 1;
- res |= val & 1;
- val >>= 1;
- }
- return res;
-}
-
int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
unsigned char val)
{
@@ -76,23 +66,28 @@ int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
buf[0] = reg & 0x7f;
buf[1] = val;
if ((err = snd_i2c_sendbytes(device, buf, 2)) != 2) {
- snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x to CS8427 (%i)\n", buf[0], buf[1], err);
+ snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x "
+ "to CS8427 (%i)\n", buf[0], buf[1], err);
return err < 0 ? err : -EIO;
}
return 0;
}
+EXPORT_SYMBOL(snd_cs8427_reg_write);
+
static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg)
{
int err;
unsigned char buf;
if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
- snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg);
+ snd_printk(KERN_ERR "unable to send register 0x%x byte "
+ "to CS8427\n", reg);
return err < 0 ? err : -EIO;
}
if ((err = snd_i2c_readbytes(device, &buf, 1)) != 1) {
- snd_printk(KERN_ERR "unable to read register 0x%x byte from CS8427\n", reg);
+ snd_printk(KERN_ERR "unable to read register 0x%x byte "
+ "from CS8427\n", reg);
return err < 0 ? err : -EIO;
}
return buf;
@@ -121,7 +116,8 @@ static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
int count)
{
struct cs8427 *chip = device->private_data;
- char *hw_data = udata ? chip->playback.hw_udata : chip->playback.hw_status;
+ char *hw_data = udata ?
+ chip->playback.hw_udata : chip->playback.hw_status;
char data[32];
int err, idx;
@@ -134,16 +130,16 @@ static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
memset(data, 0, sizeof(data));
if (memcmp(hw_data, data, count) == 0) {
chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK;
- chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS | CS8427_EFTUI;
- if ((err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF,
- chip->regmap[CS8427_REG_UDATABUF])) < 0)
- return err;
- return 0;
+ chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS |
+ CS8427_EFTUI;
+ err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF,
+ chip->regmap[CS8427_REG_UDATABUF]);
+ return err < 0 ? err : 0;
}
}
data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
for (idx = 0; idx < count; idx++)
- data[idx + 1] = swapbits(ndata[idx]);
+ data[idx + 1] = bitrev8(ndata[idx]);
if (snd_i2c_sendbytes(device, data, count + 1) != count + 1)
return -EIO;
return 1;
@@ -154,31 +150,37 @@ static void snd_cs8427_free(struct snd_i2c_device *device)
kfree(device->private_data);
}
-int snd_cs8427_create(struct snd_i2c_bus *bus,
- unsigned char addr,
- unsigned int reset_timeout,
- struct snd_i2c_device **r_cs8427)
+int snd_cs8427_init(struct snd_i2c_bus *bus,
+ struct snd_i2c_device *device)
{
static unsigned char initvals1[] = {
CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
- /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes, TCBL=output */
+ /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes,
+ TCBL=output */
CS8427_SWCLK | CS8427_TCBLDIR,
- /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs, normal stereo operation */
+ /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs,
+ normal stereo operation */
0x00,
- /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial, Rx=>serial */
+ /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial,
+ Rx=>serial */
CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER,
- /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs, output time base = OMCK, input time base =
- recovered input clock, recovered input clock source is ILRCK changed to AES3INPUT (workaround, see snd_cs8427_reset) */
+ /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs,
+ output time base = OMCK, input time base = recovered input clock,
+ recovered input clock source is ILRCK changed to AES3INPUT
+ (workaround, see snd_cs8427_reset) */
CS8427_RXDILRCK,
- /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S, 24-bit, 64*Fsi */
+ /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S,
+ 24-bit, 64*Fsi */
CS8427_SIDEL | CS8427_SILRPOL,
- /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format = I2S, 24-bit, 64*Fsi */
+ /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format
+ = I2S, 24-bit, 64*Fsi */
CS8427_SODEL | CS8427_SOLRPOL,
};
static unsigned char initvals2[] = {
CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC,
- /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence, biphase, parity status bits */
- /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR, */
+ /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence,
+ biphase, parity status bits */
+ /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR,*/
0xff, /* set everything */
/* CS8427_REG_CSDATABUF:
Registers 32-55 window to CS buffer
@@ -196,24 +198,19 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
Inhibit E->F transfers. */
CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
};
+ struct cs8427 *chip = device->private_data;
int err;
- struct cs8427 *chip;
- struct snd_i2c_device *device;
unsigned char buf[24];
- if ((err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7),
- &device)) < 0)
- return err;
- chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
- if (chip == NULL) {
- snd_i2c_device_free(device);
- return -ENOMEM;
- }
- device->private_free = snd_cs8427_free;
-
snd_i2c_lock(bus);
- if ((err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER)) !=
- CS8427_VER8427A) {
+ err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
+ if (err != CS8427_VER8427A) {
+ /* give second chance */
+ snd_printk(KERN_WARNING "invalid CS8427 signature 0x%x: "
+ "let me try again...\n", err);
+ err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
+ }
+ if (err != CS8427_VER8427A) {
snd_i2c_unlock(bus);
snd_printk(KERN_ERR "unable to find CS8427 signature "
"(expected 0x%x, read 0x%x),\n",
@@ -222,7 +219,8 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
return -EFAULT;
}
/* turn off run bit while making changes to configuration */
- if ((err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00)) < 0)
+ err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00);
+ if (err < 0)
goto __fail;
/* send initial values */
memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6);
@@ -243,10 +241,7 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
goto __fail;
}
/* write default channel status bytes */
- buf[0] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 0));
- buf[1] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 8));
- buf[2] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 16));
- buf[3] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 24));
+ put_unaligned_le32(SNDRV_PCM_DEFAULT_CON_SPDIF, buf);
memset(buf + 4, 0, 24 - 4);
if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0)
goto __fail;
@@ -255,10 +250,44 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
snd_i2c_unlock(bus);
/* turn on run bit and rock'n'roll */
+ snd_cs8427_reset(device);
+
+ return 0;
+
+__fail:
+ snd_i2c_unlock(bus);
+
+ return err;
+}
+EXPORT_SYMBOL(snd_cs8427_init);
+
+int snd_cs8427_create(struct snd_i2c_bus *bus,
+ unsigned char addr,
+ unsigned int reset_timeout,
+ struct snd_i2c_device **r_cs8427)
+{
+ int err;
+ struct cs8427 *chip;
+ struct snd_i2c_device *device;
+
+ err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7),
+ &device);
+ if (err < 0)
+ return err;
+ chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL) {
+ snd_i2c_device_free(device);
+ return -ENOMEM;
+ }
+ device->private_free = snd_cs8427_free;
+
if (reset_timeout < 1)
reset_timeout = 1;
chip->reset_timeout = reset_timeout;
- snd_cs8427_reset(device);
+
+ err = snd_cs8427_init(bus, device);
+ if (err)
+ goto __fail;
#if 0 // it's nice for read tests
{
@@ -277,11 +306,12 @@ int snd_cs8427_create(struct snd_i2c_bus *bus,
return 0;
__fail:
- snd_i2c_unlock(bus);
snd_i2c_device_free(device);
return err < 0 ? err : -EIO;
}
+EXPORT_SYMBOL(snd_cs8427_create);
+
/*
* Reset the chip using run bit, also lock PLL using ILRCK and
* put back AES3INPUT. This workaround is described in latest
@@ -293,10 +323,12 @@ static void snd_cs8427_reset(struct snd_i2c_device *cs8427)
unsigned long end_time;
int data, aes3input = 0;
- snd_assert(cs8427, return);
+ if (snd_BUG_ON(!cs8427))
+ return;
chip = cs8427->private_data;
snd_i2c_lock(cs8427->bus);
- if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) == CS8427_RXDAES3INPUT) /* AES3 bit is set */
+ if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) ==
+ CS8427_RXDAES3INPUT) /* AES3 bit is set */
aes3input = 1;
chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK);
snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
@@ -367,12 +399,15 @@ static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol,
snd_i2c_lock(device->bus);
if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
- snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg);
+ snd_printk(KERN_ERR "unable to send register 0x%x byte "
+ "to CS8427\n", reg);
snd_i2c_unlock(device->bus);
return err < 0 ? err : -EIO;
}
- if ((err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10)) != 10) {
- snd_printk(KERN_ERR "unable to read Q-subcode bytes from CS8427\n");
+ err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10);
+ if (err != 10) {
+ snd_printk(KERN_ERR "unable to read Q-subcode bytes "
+ "from CS8427\n");
snd_i2c_unlock(device->bus);
return err < 0 ? err : -EIO;
}
@@ -380,7 +415,8 @@ static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol,
return 0;
}
-static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
+static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
uinfo->count = 1;
@@ -413,7 +449,8 @@ static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol,
snd_i2c_lock(device->bus);
change = memcmp(ucontrol->value.iec958.status, status, 24) != 0;
memcpy(status, ucontrol->value.iec958.status, 24);
- if (change && (kcontrol->private_value ? runtime != NULL : runtime == NULL)) {
+ if (change && (kcontrol->private_value ?
+ runtime != NULL : runtime == NULL)) {
err = snd_cs8427_send_corudata(device, 0, status, 24);
if (err < 0)
change = err;
@@ -442,7 +479,8 @@ static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.info = snd_cs8427_in_status_info,
.name = "IEC958 CS8427 Input Status",
- .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .access = (SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE),
.get = snd_cs8427_in_status_get,
.private_value = 15,
},
@@ -450,7 +488,8 @@ static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.info = snd_cs8427_in_status_info,
.name = "IEC958 CS8427 Error Status",
- .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .access = (SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE),
.get = snd_cs8427_in_status_get,
.private_value = 16,
},
@@ -470,7 +509,8 @@ static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
.private_value = 0
},
{
- .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
+ .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_INACTIVE),
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
.info = snd_cs8427_spdif_info,
@@ -482,7 +522,8 @@ static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.info = snd_cs8427_qsubcode_info,
.name = "IEC958 Q-subcode Capture Default",
- .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .access = (SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE),
.get = snd_cs8427_qsubcode_get
}};
@@ -495,7 +536,8 @@ int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427,
unsigned int idx;
int err;
- snd_assert(play_substream && cap_substream, return -EINVAL);
+ if (snd_BUG_ON(!play_substream || !cap_substream))
+ return -EINVAL;
for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) {
kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427);
if (kctl == NULL)
@@ -505,37 +547,47 @@ int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427,
err = snd_ctl_add(cs8427->bus->card, kctl);
if (err < 0)
return err;
- if (!strcmp(kctl->id.name, SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM)))
+ if (! strcmp(kctl->id.name,
+ SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM)))
chip->playback.pcm_ctl = kctl;
}
chip->playback.substream = play_substream;
chip->capture.substream = cap_substream;
- snd_assert(chip->playback.pcm_ctl, return -EIO);
+ if (snd_BUG_ON(!chip->playback.pcm_ctl))
+ return -EIO;
return 0;
}
+EXPORT_SYMBOL(snd_cs8427_iec958_build);
+
int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active)
{
struct cs8427 *chip;
- snd_assert(cs8427, return -ENXIO);
+ if (snd_BUG_ON(!cs8427))
+ return -ENXIO;
chip = cs8427->private_data;
if (active)
- memcpy(chip->playback.pcm_status, chip->playback.def_status, 24);
+ memcpy(chip->playback.pcm_status,
+ chip->playback.def_status, 24);
chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
- snd_ctl_notify(cs8427->bus->card, SNDRV_CTL_EVENT_MASK_VALUE |
- SNDRV_CTL_EVENT_MASK_INFO, &chip->playback.pcm_ctl->id);
+ snd_ctl_notify(cs8427->bus->card,
+ SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
+ &chip->playback.pcm_ctl->id);
return 0;
}
+EXPORT_SYMBOL(snd_cs8427_iec958_active);
+
int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate)
{
struct cs8427 *chip;
char *status;
int err, reset;
- snd_assert(cs8427, return -ENXIO);
+ if (snd_BUG_ON(!cs8427))
+ return -ENXIO;
chip = cs8427->private_data;
status = chip->playback.pcm_status;
snd_i2c_lock(cs8427->bus);
@@ -568,6 +620,8 @@ int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate)
return err < 0 ? err : 0;
}
+EXPORT_SYMBOL(snd_cs8427_iec958_pcm);
+
static int __init alsa_cs8427_module_init(void)
{
return 0;
@@ -579,10 +633,3 @@ static void __exit alsa_cs8427_module_exit(void)
module_init(alsa_cs8427_module_init)
module_exit(alsa_cs8427_module_exit)
-
-EXPORT_SYMBOL(snd_cs8427_create);
-EXPORT_SYMBOL(snd_cs8427_reset);
-EXPORT_SYMBOL(snd_cs8427_reg_write);
-EXPORT_SYMBOL(snd_cs8427_iec958_build);
-EXPORT_SYMBOL(snd_cs8427_iec958_active);
-EXPORT_SYMBOL(snd_cs8427_iec958_pcm);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 13:23:31 +0000