int i2c_dw_initialize(struct device *port)
{
struct i2c_dw_rom_config const * const rom = port->config->config_info;
struct i2c_dw_dev_config * const dev = port->driver_data;
volatile struct i2c_dw_registers *regs;
if (!i2c_dw_pci_setup(port)) {
port->driver_api = NULL;
return -EPERM;
}
device_sync_call_init(&dev->sync);
regs = (struct i2c_dw_registers *) rom->base_address;
/* verify that we have a valid DesignWare register first */
if (regs->ic_comp_type != I2C_DW_MAGIC_KEY) {
port->driver_api = NULL;
DBG("I2C: DesignWare magic key not found, check base address.");
DBG(" Stopping initialization\n");
return -EPERM;
}
/*
* grab the default value on initialization. This should be set to the
* IC_MAX_SPEED_MODE in the hardware. If it does support high speed we
* can move provide support for it
*/
if (regs->ic_con.bits.speed == I2C_DW_SPEED_HIGH) {
DBG("I2C: high speed supported\n");
dev->support_hs_mode = true;
} else {
DBG("I2C: high speed NOT supported\n");
dev->support_hs_mode = false;
}
rom->config_func(port);
if (i2c_dw_runtime_configure(port, dev->app_config.raw) != 0) {
DBG("I2C: Cannot set default configuration 0x%x\n",
dev->app_config.raw);
return -EPERM;
}
dev->state = I2C_DW_STATE_READY;
return 0;
}
static int i2c_dw_initialize(struct device *dev)
{
const struct i2c_dw_rom_config * const rom = dev->config->config_info;
struct i2c_dw_dev_config * const dw = dev->driver_data;
volatile struct i2c_dw_registers *regs;
if (!i2c_dw_pci_setup(dev)) {
dev->driver_api = NULL;
return -EIO;
}
k_sem_init(&dw->device_sync_sem, 0, UINT_MAX);
regs = (struct i2c_dw_registers *) dw->base_address;
/* verify that we have a valid DesignWare register first */
if (regs->ic_comp_type != I2C_DW_MAGIC_KEY) {
dev->driver_api = NULL;
SYS_LOG_DBG("I2C: DesignWare magic key not found, check base "
"address. Stopping initialization");
return -EIO;
}
/*
* grab the default value on initialization. This should be set to the
* IC_MAX_SPEED_MODE in the hardware. If it does support high speed we
* can move provide support for it
*/
if (regs->ic_con.bits.speed == I2C_DW_SPEED_HIGH) {
SYS_LOG_DBG("I2C: high speed supported");
dw->support_hs_mode = true;
} else {
SYS_LOG_DBG("I2C: high speed NOT supported");
dw->support_hs_mode = false;
}
rom->config_func(dev);
dw->app_config = I2C_MODE_MASTER | _i2c_map_dt_bitrate(rom->bitrate);
if (i2c_dw_runtime_configure(dev, dw->app_config) != 0) {
SYS_LOG_DBG("I2C: Cannot set default configuration");
return -EIO;
}
dw->state = I2C_DW_STATE_READY;
return 0;
}
