static void keep_power_up_count(
struct engine *engine,
bool keep_power_up)
{
struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
if (keep_power_up)
++hw_engine->engine_keep_power_up_count;
else {
--hw_engine->engine_keep_power_up_count;
if (!hw_engine->engine_keep_power_up_count)
disable_i2c_hw_engine(hw_engine);
}
}
static void release_engine(
struct engine *engine)
{
struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
struct i2c_engine *base = NULL;
bool safe_to_reset;
base = &hw_engine->base.base;
/* Restore original HW engine speed */
base->funcs->set_speed(base, hw_engine->base.original_speed);
/* Release I2C */
REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_DONE_USING_I2C_REG, 1);
/* Reset HW engine */
{
uint32_t i2c_sw_status = 0;
REG_GET(DC_I2C_SW_STATUS, DC_I2C_SW_STATUS, &i2c_sw_status);
/* if used by SW, safe to reset */
safe_to_reset = (i2c_sw_status == 1);
}
if (safe_to_reset)
REG_UPDATE_2(
DC_I2C_CONTROL,
DC_I2C_SOFT_RESET, 1,
DC_I2C_SW_STATUS_RESET, 1);
else
REG_UPDATE(DC_I2C_CONTROL, DC_I2C_SW_STATUS_RESET, 1);
/* HW I2c engine - clock gating feature */
if (!hw_engine->engine_keep_power_up_count)
disable_i2c_hw_engine(hw_engine);
}
static void release_engine(
struct engine *engine)
{
struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
struct i2c_engine *base = NULL;
bool safe_to_reset;
uint32_t value = 0;
base = &hw_engine->base.base;
/* Restore original HW engine speed */
base->funcs->set_speed(base, hw_engine->base.original_speed);
/* Release I2C */
{
value = dal_read_reg(engine->ctx, mmDC_I2C_ARBITRATION);
set_reg_field_value(
value,
1,
DC_I2C_ARBITRATION,
DC_I2C_SW_DONE_USING_I2C_REG);
dal_write_reg(engine->ctx, mmDC_I2C_ARBITRATION, value);
}
/* Reset HW engine */
{
uint32_t i2c_sw_status = 0;
value = dal_read_reg(engine->ctx, mmDC_I2C_SW_STATUS);
i2c_sw_status = get_reg_field_value(
value,
DC_I2C_SW_STATUS,
DC_I2C_SW_STATUS);
/* if used by SW, safe to reset */
safe_to_reset = (i2c_sw_status == 1);
}
{
value = dal_read_reg(engine->ctx, mmDC_I2C_CONTROL);
if (safe_to_reset)
set_reg_field_value(
value,
1,
DC_I2C_CONTROL,
DC_I2C_SOFT_RESET);
set_reg_field_value(
value,
1,
DC_I2C_CONTROL,
DC_I2C_SW_STATUS_RESET);
dal_write_reg(engine->ctx, mmDC_I2C_CONTROL, value);
}
/* HW I2c engine - clock gating feature */
if (!hw_engine->engine_keep_power_up_count)
disable_i2c_hw_engine(hw_engine);
}
