static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
int data;
snd_i2c_lock(device->bus);
data = snd_cs8427_reg_read(device, kcontrol->private_value);
snd_i2c_unlock(device->bus);
if (data < 0)
return data;
ucontrol->value.integer.value[0] = data;
return 0;
}
/*
* Reset the chip using run bit, also lock PLL using ILRCK and
* put back AES3INPUT. This workaround is described in latest
* CS8427 datasheet, otherwise TXDSERIAL will not work.
*/
static void snd_cs8427_reset(struct snd_i2c_device *cs8427)
{
struct cs8427 *chip;
unsigned long end_time;
int data, aes3input = 0;
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 */
aes3input = 1;
chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK);
snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
chip->regmap[CS8427_REG_CLOCKSOURCE]);
udelay(200);
chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK;
snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
chip->regmap[CS8427_REG_CLOCKSOURCE]);
udelay(200);
snd_i2c_unlock(cs8427->bus);
end_time = jiffies + chip->reset_timeout;
while (time_after_eq(end_time, jiffies)) {
snd_i2c_lock(cs8427->bus);
data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS);
snd_i2c_unlock(cs8427->bus);
if (!(data & CS8427_UNLOCK))
break;
schedule_timeout_uninterruptible(1);
}
snd_i2c_lock(cs8427->bus);
chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK;
if (aes3input)
chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT;
snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
chip->regmap[CS8427_REG_CLOCKSOURCE]);
snd_i2c_unlock(cs8427->bus);
}
int snd_cs8427_create(struct snd_i2c_bus *bus,
unsigned char addr,
unsigned int reset_timeout,
struct snd_i2c_device **r_cs8427)
{
static unsigned char initvals1[] = {
CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
/* 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 */
0x00,
/* 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_RXDILRCK,
/* 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_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,*/
0xff, /* set everything */
/* CS8427_REG_CSDATABUF:
Registers 32-55 window to CS buffer
Inhibit D->E transfers from overwriting first 5 bytes of CS data.
Inhibit D->E transfers (all) of CS data.
Allow E->F transfer of CS data.
One byte mode; both A/B channels get same written CB data.
A channel info is output to chip's EMPH* pin. */
CS8427_CBMR | CS8427_DETCI,
/* CS8427_REG_UDATABUF:
Use internal buffer to transmit User (U) data.
Chip's U pin is an output.
Transmit all O's for user data.
Inhibit D->E transfers.
Inhibit E->F transfers. */
CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
};
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);
err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
if (err != CS8427_VER8427A) {
/* give second chance */
#ifdef CONFIG_DEBUG_PRINTK
snd_printk(KERN_WARNING "invalid CS8427 signature 0x%x: "
"let me try again...\n", err);
#else
;
#endif
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",
CS8427_VER8427A, err);
snd_printk(KERN_ERR " initialization is not completed\n");
return -EFAULT;
}
/* turn off run bit while making changes to configuration */
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);
if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) {
err = err < 0 ? err : -EIO;
goto __fail;
}
/* Turn off CS8427 interrupt stuff that is not used in hardware */
memset(buf, 0, 7);
/* from address 9 to 15 */
buf[0] = 9; /* register */
if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7)
goto __fail;
/* send transfer initialization sequence */
memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3);
if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) {
err = err < 0 ? err : -EIO;
goto __fail;
}
/* write default channel status bytes */
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;
memcpy(chip->playback.def_status, buf, 24);
memcpy(chip->playback.pcm_status, buf, 24);
snd_i2c_unlock(bus);
/* turn on run bit and rock'n'roll */
if (reset_timeout < 1)
reset_timeout = 1;
chip->reset_timeout = reset_timeout;
snd_cs8427_reset(device);
#if 0 // it's nice for read tests
{
char buf[128];
int xx;
buf[0] = 0x81;
snd_i2c_sendbytes(device, buf, 1);
snd_i2c_readbytes(device, buf, 127);
for (xx = 0; xx < 127; xx++)
#ifdef CONFIG_DEBUG_PRINTK
printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]);
#else
;
#endif
}
#endif
if (r_cs8427)
*r_cs8427 = device;
return 0;
__fail:
snd_i2c_unlock(bus);
snd_i2c_device_free(device);
return err < 0 ? err : -EIO;
}
int snd_cs8427_create(struct snd_i2c_bus *bus,
unsigned char addr,
unsigned int reset_timeout,
struct snd_i2c_device **r_cs8427)
{
static unsigned char initvals1[] = {
CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
/*
*/
CS8427_SWCLK | CS8427_TCBLDIR,
/*
*/
0x00,
/*
*/
CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER,
/*
*/
CS8427_RXDILRCK,
/*
*/
CS8427_SIDEL | CS8427_SILRPOL,
/*
*/
CS8427_SODEL | CS8427_SOLRPOL,
};
static unsigned char initvals2[] = {
CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC,
/*
*/
/* */
0xff, /* */
/*
*/
CS8427_CBMR | CS8427_DETCI,
/*
*/
CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
};
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);
err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
if (err != CS8427_VER8427A) {
/* */
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",
CS8427_VER8427A, err);
snd_printk(KERN_ERR " initialization is not completed\n");
return -EFAULT;
}
/* */
err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00);
if (err < 0)
goto __fail;
/* */
memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6);
if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) {
err = err < 0 ? err : -EIO;
goto __fail;
}
/* */
memset(buf, 0, 7);
/* */
buf[0] = 9; /* */
if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7)
goto __fail;
/* */
memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3);
if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) {
err = err < 0 ? err : -EIO;
goto __fail;
}
/* */
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;
memcpy(chip->playback.def_status, buf, 24);
memcpy(chip->playback.pcm_status, buf, 24);
snd_i2c_unlock(bus);
/* */
if (reset_timeout < 1)
reset_timeout = 1;
chip->reset_timeout = reset_timeout;
snd_cs8427_reset(device);
#if 0 //
{
char buf[128];
int xx;
buf[0] = 0x81;
snd_i2c_sendbytes(device, buf, 1);
snd_i2c_readbytes(device, buf, 127);
for (xx = 0; xx < 127; xx++)
printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]);
}
#endif
if (r_cs8427)
*r_cs8427 = device;
return 0;
__fail:
snd_i2c_unlock(bus);
snd_i2c_device_free(device);
return err < 0 ? err : -EIO;
}
