From e20c47b408807c7562fc8c05e06780e3e9199573 Mon Sep 17 00:00:00 2001 From: Jeremy Soller Date: Tue, 26 Jan 2021 13:21:12 -0700 Subject: [PATCH] drivers/i2c/tas5825m: Add driver for TI TAS5825M This adds a driver for the TI TAS5825M smart amplifier [1]. The 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 addw1, bonw14, oryp5, and oryp6. [1]: https://www.ti.com/product/TAS5825M Signed-off-by: Jeremy Soller Signed-off-by: Tim Crawford Change-Id: I896e8f272f18e64bfc90f406e7d4163010800aaf Reviewed-on: https://review.coreboot.org/c/coreboot/+/43614 Tested-by: build bot (Jenkins) --- src/drivers/i2c/tas5825m/Kconfig | 5 ++ src/drivers/i2c/tas5825m/Makefile.inc | 1 + src/drivers/i2c/tas5825m/chip.h | 6 ++ src/drivers/i2c/tas5825m/tas5825m.c | 80 +++++++++++++++++++++++++++ src/drivers/i2c/tas5825m/tas5825m.h | 15 +++++ 5 files changed, 107 insertions(+) create mode 100644 src/drivers/i2c/tas5825m/Kconfig create mode 100644 src/drivers/i2c/tas5825m/Makefile.inc create mode 100644 src/drivers/i2c/tas5825m/chip.h create mode 100644 src/drivers/i2c/tas5825m/tas5825m.c create mode 100644 src/drivers/i2c/tas5825m/tas5825m.h diff --git a/src/drivers/i2c/tas5825m/Kconfig b/src/drivers/i2c/tas5825m/Kconfig new file mode 100644 index 0000000000..0deca1742c --- /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 0000000000..909ffdb85c --- /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/chip.h b/src/drivers/i2c/tas5825m/chip.h new file mode 100644 index 0000000000..23af491d3e --- /dev/null +++ b/src/drivers/i2c/tas5825m/chip.h @@ -0,0 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +struct drivers_i2c_tas5825m_config { + // Used to uniquely identify the AMP + int id; +}; diff --git a/src/drivers/i2c/tas5825m/tas5825m.c b/src/drivers/i2c/tas5825m/tas5825m.c new file mode 100644 index 0000000000..39e5575f1e --- /dev/null +++ b/src/drivers/i2c/tas5825m/tas5825m.c @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include +#include +#include +#include "chip.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, int id) +{ + 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)); + + struct drivers_i2c_tas5825m_config *config = dev->chip_info; + if (config) { + printk(BIOS_DEBUG, "tas5825m id %d\n", config->id); + int res = tas5825m_setup(dev, config->id); + if (res) + printk(BIOS_ERR, "tas5825m init failed: %d\n", res); + else + printk(BIOS_DEBUG, "tas5825m init successful\n"); + } else { + printk(BIOS_ERR, "tas5825m: failed to find config\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 0000000000..33b8a4842d --- /dev/null +++ b/src/drivers/i2c/tas5825m/tas5825m.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef TAS5825M_H +#define TAS5825M_H + +#include + +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, int id); + +#endif // TAS5825M_H