Jeremy Soller has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/43614 )
Change subject: drivers/i2c/tas5825m: Add driver for TI TAS5825M amplifier ......................................................................
drivers/i2c/tas5825m: Add driver for TI TAS5825M amplifier
This adds a driver for the TI TAS5825M, documentation can be found here: https://www.ti.com/product/TAS5825M
This driver expects the mainboard using it to define tas5825m_setup, which uses the tas5825m_* functions to set configuration data. Each mainboard may have very different configuration data, depending on its audio hardware.
Tested on system76/addw2 and system76/oryp6, which will be added in a future patch.
Signed-off-by: Jeremy Soller jeremy@system76.com Change-Id: I896e8f272f18e64bfc90f406e7d4163010800aaf --- A src/drivers/i2c/tas5825m/Kconfig A src/drivers/i2c/tas5825m/Makefile.inc A src/drivers/i2c/tas5825m/tas5825m.c A src/drivers/i2c/tas5825m/tas5825m.h 4 files changed, 81 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/14/43614/1
diff --git a/src/drivers/i2c/tas5825m/Kconfig b/src/drivers/i2c/tas5825m/Kconfig new file mode 100644 index 0000000..0deca17 --- /dev/null +++ b/src/drivers/i2c/tas5825m/Kconfig @@ -0,0 +1,5 @@ +config DRIVERS_I2C_TAS5825M + bool + default n + help + Enable support for TI TAS5825M Amplifier. diff --git a/src/drivers/i2c/tas5825m/Makefile.inc b/src/drivers/i2c/tas5825m/Makefile.inc new file mode 100644 index 0000000..909ffdb --- /dev/null +++ b/src/drivers/i2c/tas5825m/Makefile.inc @@ -0,0 +1 @@ +ramstage-$(CONFIG_DRIVERS_I2C_TAS5825M) += tas5825m.c diff --git a/src/drivers/i2c/tas5825m/tas5825m.c b/src/drivers/i2c/tas5825m/tas5825m.c new file mode 100644 index 0000000..2970a8ee --- /dev/null +++ b/src/drivers/i2c/tas5825m/tas5825m.c @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <console/console.h> +#include <device/smbus.h> +#include <device/pci.h> +#include "tas5825m.h" + +int tas5825m_write_at(struct device *dev, uint8_t addr, uint8_t value) { + return smbus_write_byte(dev, addr, value); +} + +//TODO: use I2C block write for better performance +int tas5825m_write_block_at(struct device *dev, uint8_t addr, const uint8_t * values, uint8_t length) { + int res = 0; + for (uint8_t i = 0; i < length; i++) { + res = smbus_write_byte(dev, addr + i, values[i]); + if (res < 0) return res; + } + return (int)length; +} + +int tas5825m_set_page(struct device *dev, uint8_t page) { + return tas5825m_write_at(dev, 0x00, page); +} + +int tas5825m_set_book(struct device *dev, uint8_t book) { + int res = tas5825m_set_page(dev, 0x00); + if (res < 0) return res; + return tas5825m_write_at(dev, 0x7F, book); +} + +__weak int tas5825m_setup(struct device *dev) { + printk(BIOS_ERR, "tas5825m: setup not implemented\n"); + return -1; +} + +static void tas5825m_init(struct device *dev) { + if (dev->enabled && dev->path.type == DEVICE_PATH_I2C && + ops_smbus_bus(get_pbus_smbus(dev))) { + printk(BIOS_DEBUG, "tas5825m at %s\n", dev_path(dev)); + int res = tas5825m_setup(dev); + if (res) { + printk(BIOS_ERR, "tas5825m init failed: %d\n", res); + } else { + printk(BIOS_DEBUG, "tas5825m init successful\n"); + } + } +} + +static struct device_operations tas5825m_operations = { + .read_resources = noop_read_resources, + .set_resources = noop_set_resources, + .init = tas5825m_init, +}; + +static void tas5825m_enable_dev(struct device *dev) { + dev->ops = &tas5825m_operations; +} + +struct chip_operations drivers_i2c_tas5825m_ops = { + CHIP_NAME("TI TAS5825M Amplifier") + .enable_dev = tas5825m_enable_dev, +}; diff --git a/src/drivers/i2c/tas5825m/tas5825m.h b/src/drivers/i2c/tas5825m/tas5825m.h new file mode 100644 index 0000000..c58f86a --- /dev/null +++ b/src/drivers/i2c/tas5825m/tas5825m.h @@ -0,0 +1,12 @@ +#ifndef TAS5825M_H +#define TAS5825M_H + +#include <device/device.h> + +int tas5825m_write_at(struct device *dev, uint8_t addr, uint8_t value); +int tas5825m_write_block_at(struct device *dev, uint8_t addr, const uint8_t * values, uint8_t length); +int tas5825m_set_page(struct device *dev, uint8_t page); +int tas5825m_set_book(struct device *dev, uint8_t book); +int tas5825m_setup(struct device *dev); + +#endif // TAS5825M_H