diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/i2caux/i2c_sw_engine.h')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/i2caux/i2c_sw_engine.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/i2c_sw_engine.h b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_sw_engine.h new file mode 100644 index 000000000000..546f15b0d3f1 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_sw_engine.h @@ -0,0 +1,81 @@ +/* + * Copyright 2012-15 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#ifndef __DAL_I2C_SW_ENGINE_H__ +#define __DAL_I2C_SW_ENGINE_H__ + +enum { + I2C_SW_RETRIES = 10, + I2C_SW_SCL_READ_RETRIES = 128, + /* following value is in microseconds */ + I2C_SW_TIMEOUT_DELAY = 3000 +}; + +struct i2c_sw_engine; + +struct i2c_sw_engine { + struct i2c_engine base; + uint32_t clock_delay; + /* Values below are in KHz */ + uint32_t speed; + uint32_t default_speed; +}; + +struct i2c_sw_engine_create_arg { + uint32_t default_speed; + struct dc_context *ctx; +}; + +void dal_i2c_sw_engine_construct( + struct i2c_sw_engine *engine, + const struct i2c_sw_engine_create_arg *arg); + +bool dal_i2caux_i2c_sw_engine_acquire_engine( + struct i2c_engine *engine, + struct ddc *ddc_handle); + +void dal_i2c_sw_engine_destruct( + struct i2c_sw_engine *engine); + +struct i2c_engine *dal_i2c_sw_engine_create( + const struct i2c_sw_engine_create_arg *arg); +enum i2caux_engine_type dal_i2c_sw_engine_get_engine_type( + const struct engine *engine); +bool dal_i2c_sw_engine_submit_request( + struct engine *ptr, + struct i2caux_transaction_request *i2caux_request, + bool middle_of_transaction); +uint32_t dal_i2c_sw_engine_get_speed( + const struct i2c_engine *engine); +void dal_i2c_sw_engine_set_speed( + struct i2c_engine *ptr, + uint32_t speed); +void dal_i2c_sw_engine_submit_channel_request( + struct i2c_engine *ptr, + struct i2c_request_transaction_data *req); +enum i2c_channel_operation_result dal_i2c_sw_engine_get_channel_status( + struct i2c_engine *engine, + uint8_t *returned_bytes); +#endif |