smbus_ops.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <stdint.h>
#include <console/console.h>
#include <device/device.h>
#include <device/smbus.h>
 
struct bus *get_pbus_smbus(struct device *dev)
{
        struct bus *const pbus = i2c_link(dev);
        if (!pbus->dev->ops->ops_smbus_bus) {
                printk(BIOS_ALERT, "%s Cannot find SMBus bus operations",
                       dev_path(dev));
                die("");
        }
        return pbus;
}
 
#define CHECK_PRESENCE(x)                                      \
        if (!ops_smbus_bus(get_pbus_smbus(dev))->x) {          \
                printk(BIOS_ERR, "%s missing " #x "\n",        \
                       dev_path(dev));                         \
                return -1;                                     \
        }
 
int smbus_block_read(struct device *dev, u8 cmd, u8 bytes, u8 *buffer)
{
        CHECK_PRESENCE(block_read);
 
        return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd,
                                                              bytes, buffer);
}
 
int smbus_block_write(struct device *dev, u8 cmd, u8 bytes, const u8 *buffer)
{
        CHECK_PRESENCE(block_write);
 
        return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd,
                                                               bytes, buffer);
}