diff options
Diffstat (limited to 'sound/pci/oxygen')
| -rw-r--r-- | sound/pci/oxygen/oxygen.h | 1 | ||||
| -rw-r--r-- | sound/pci/oxygen/oxygen_io.c | 23 |
2 files changed, 22 insertions, 2 deletions
diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h index 2f25c8dbaf8..d53c18c6fcd 100644 --- a/sound/pci/oxygen/oxygen.h +++ b/sound/pci/oxygen/oxygen.h @@ -146,6 +146,7 @@ void oxygen_write_ac97_masked(struct oxygen *chip, unsigned int codec, unsigned int index, u16 data, u16 mask); void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data); +void oxygen_write_i2c(struct oxygen *chip, u8 device, u8 map, u8 data); static inline void oxygen_set_bits8(struct oxygen *chip, unsigned int reg, u8 value) diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c index 74e23ef9c94..5569606ee87 100644 --- a/sound/pci/oxygen/oxygen_io.c +++ b/sound/pci/oxygen/oxygen_io.c @@ -190,12 +190,31 @@ void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data) --count; } - spin_lock_irq(&chip->reg_lock); oxygen_write8(chip, OXYGEN_SPI_DATA1, data); oxygen_write8(chip, OXYGEN_SPI_DATA2, data >> 8); if (control & OXYGEN_SPI_DATA_LENGTH_3) oxygen_write8(chip, OXYGEN_SPI_DATA3, data >> 16); oxygen_write8(chip, OXYGEN_SPI_CONTROL, control); - spin_unlock_irq(&chip->reg_lock); } EXPORT_SYMBOL(oxygen_write_spi); + +void oxygen_write_i2c(struct oxygen *chip, u8 device, u8 map, u8 data) +{ + unsigned long timeout; + + /* should not need more than about 300 us */ + timeout = jiffies + msecs_to_jiffies(1); + do { + if (!(oxygen_read16(chip, OXYGEN_2WIRE_BUS_STATUS) + & OXYGEN_2WIRE_BUSY)) + break; + udelay(1); + cond_resched(); + } while (time_after_eq(timeout, jiffies)); + + oxygen_write8(chip, OXYGEN_2WIRE_MAP, map); + oxygen_write8(chip, OXYGEN_2WIRE_DATA, data); + oxygen_write8(chip, OXYGEN_2WIRE_CONTROL, + device | OXYGEN_2WIRE_DIR_WRITE); +} +EXPORT_SYMBOL(oxygen_write_i2c); |