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authorJeremy Soller <jeremy@system76.com>2021-01-26 13:21:12 -0700
committerPatrick Georgi <pgeorgi@google.com>2021-04-15 07:36:03 +0000
commite20c47b408807c7562fc8c05e06780e3e9199573 (patch)
treee8d3ed48ac2aa604cca00e3fb7d22a5329201552 /src/drivers
parenta1165fdfd494127315ec888e9a084ba0371e0187 (diff)
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 <jeremy@system76.com> Signed-off-by: Tim Crawford <tcrawford@system76.com> Change-Id: I896e8f272f18e64bfc90f406e7d4163010800aaf Reviewed-on: https://review.coreboot.org/c/coreboot/+/43614 Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/drivers')
-rw-r--r--src/drivers/i2c/tas5825m/Kconfig5
-rw-r--r--src/drivers/i2c/tas5825m/Makefile.inc1
-rw-r--r--src/drivers/i2c/tas5825m/chip.h6
-rw-r--r--src/drivers/i2c/tas5825m/tas5825m.c80
-rw-r--r--src/drivers/i2c/tas5825m/tas5825m.h15
5 files changed, 107 insertions, 0 deletions
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 <console/console.h>
+#include <device/smbus.h>
+#include <device/pci.h>
+#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 <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, int id);
+
+#endif // TAS5825M_H