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ALSA: oxygen: Xonar DG(X): add new CS4245 SPI functions 

Add the new SPI write and read functions. The SPI read function
is used for creating initial registers dump and may be used for
debugging purposes. SPI operations are cached, so there is a new
function to manage the cache (shadow). I have to remove
the shift from the CS4245_SPI_* constants, since when
we are performing the reading, we need to shift by 8 instead
of 16.

Signed-off-by: Roman Volkov <v1ron@mail.ru>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Roman Volkov 2014-01-24 16:18:08 +04:00 committed by Clemens Ladisch
parent ddd624c332
commit bed61935cc
3 changed files with 73 additions and 4 deletions
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7
sound/pci/oxygen/cs4245.h
View File

@ -102,6 +102,9 @@
#define CS4245_ADC_OVFL 0x02
#define CS4245_ADC_UNDRFL 0x01
#define CS4245_SPI_ADDRESS_S (0x9e << 16)
#define CS4245_SPI_WRITE_S (0 << 16)
#define CS4245_SPI_ADDRESS (0x9e << 16)
#define CS4245_SPI_WRITE (0 << 16)
#define CS4245_SPI_ADDRESS 0x9e
#define CS4245_SPI_WRITE 0
#define CS4245_SPI_READ 1

63
sound/pci/oxygen/xonar_dg.c
View File

@ -64,6 +64,65 @@
#include "xonar_dg.h"
#include "cs4245.h"
int cs4245_write_spi(struct oxygen *chip, u8 reg)
{
struct dg *data = chip->model_data;
unsigned int packet;
packet = reg << 8;
packet |= (CS4245_SPI_ADDRESS | CS4245_SPI_WRITE) << 16;
packet |= data->cs4245_shadow[reg];
return oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
OXYGEN_SPI_DATA_LENGTH_3 |
OXYGEN_SPI_CLOCK_1280 |
(0 << OXYGEN_SPI_CODEC_SHIFT) |
OXYGEN_SPI_CEN_LATCH_CLOCK_HI,
packet);
}
int cs4245_read_spi(struct oxygen *chip, u8 addr)
{
struct dg *data = chip->model_data;
int ret;
ret = oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
OXYGEN_SPI_DATA_LENGTH_2 |
OXYGEN_SPI_CEN_LATCH_CLOCK_HI |
OXYGEN_SPI_CLOCK_1280 | (0 << OXYGEN_SPI_CODEC_SHIFT),
((CS4245_SPI_ADDRESS | CS4245_SPI_WRITE) << 8) | addr);
if (ret < 0)
return ret;
ret = oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
OXYGEN_SPI_DATA_LENGTH_2 |
OXYGEN_SPI_CEN_LATCH_CLOCK_HI |
OXYGEN_SPI_CLOCK_1280 | (0 << OXYGEN_SPI_CODEC_SHIFT),
(CS4245_SPI_ADDRESS | CS4245_SPI_READ) << 8);
if (ret < 0)
return ret;
data->cs4245_shadow[addr] = oxygen_read8(chip, OXYGEN_SPI_DATA1);
return 0;
}
int cs4245_shadow_control(struct oxygen *chip, enum cs4245_shadow_operation op)
{
struct dg *data = chip->model_data;
unsigned char addr;
int ret;
for (addr = 1; addr < ARRAY_SIZE(data->cs4245_shadow); addr++) {
ret = (op == CS4245_SAVE_TO_SHADOW ?
cs4245_read_spi(chip, addr) :
cs4245_write_spi(chip, addr));
if (ret < 0)
return ret;
}
return 0;
}
static void cs4245_write(struct oxygen *chip, unsigned int reg, u8 value)
{
struct dg *data = chip->model_data;
@ -73,8 +132,8 @@ static void cs4245_write(struct oxygen *chip, unsigned int reg, u8 value)
OXYGEN_SPI_CLOCK_1280 |
(0 << OXYGEN_SPI_CODEC_SHIFT) |
OXYGEN_SPI_CEN_LATCH_CLOCK_HI,
CS4245_SPI_ADDRESS |
CS4245_SPI_WRITE |
CS4245_SPI_ADDRESS_S |
CS4245_SPI_WRITE_S |
(reg << 8) | value);
data->cs4245_regs[reg] = value;
}

7
sound/pci/oxygen/xonar_dg.h
View File

@ -18,7 +18,14 @@
#define PLAYBACK_DST_HP_FP 1
#define PLAYBACK_DST_MULTICH 2
enum cs4245_shadow_operation {
CS4245_SAVE_TO_SHADOW,
CS4245_LOAD_FROM_SHADOW
};
struct dg {
/* shadow copy of the CS4245 register space */
unsigned char cs4245_shadow[17];
unsigned int output_sel;
s8 input_vol[4][2];
unsigned int input_sel;