tas5825m.c

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/* 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,
};