diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/i2caux/dce80/i2c_hw_engine_dce80.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/i2caux/dce80/i2c_hw_engine_dce80.c | 875 |
1 files changed, 875 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce80/i2c_hw_engine_dce80.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce80/i2c_hw_engine_dce80.c new file mode 100644 index 000000000000..fd0832dd2c75 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce80/i2c_hw_engine_dce80.c @@ -0,0 +1,875 @@ +/* + * 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 + * + */ + +#include "dm_services.h" + +/* + * Pre-requisites: headers required by header of this unit + */ +#include "include/i2caux_interface.h" +#include "../engine.h" +#include "../i2c_engine.h" +#include "../i2c_hw_engine.h" +#include "../i2c_generic_hw_engine.h" +/* + * Header of this unit + */ + +#include "i2c_hw_engine_dce80.h" + +/* + * Post-requisites: headers required by this unit + */ + +#include "dce/dce_8_0_d.h" +#include "dce/dce_8_0_sh_mask.h" +/* + * This unit + */ + +enum dc_i2c_status { + DC_I2C_STATUS__DC_I2C_STATUS_IDLE, + DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_SW, + DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_HW +}; + +enum dc_i2c_arbitration { + DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_NORMAL, + DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_HIGH +}; + +enum { + /* No timeout in HW + * (timeout implemented in SW by querying status) */ + I2C_SETUP_TIME_LIMIT = 255, + I2C_HW_BUFFER_SIZE = 144 +}; + +/* + * @brief + * Cast 'struct i2c_hw_engine *' + * to 'struct i2c_hw_engine_dce80 *' + */ +#define FROM_I2C_HW_ENGINE(ptr) \ + container_of((ptr), struct i2c_hw_engine_dce80, base) + +/* + * @brief + * Cast pointer to 'struct i2c_engine *' + * to pointer to 'struct i2c_hw_engine_dce80 *' + */ +#define FROM_I2C_ENGINE(ptr) \ + FROM_I2C_HW_ENGINE(container_of((ptr), struct i2c_hw_engine, base)) + +/* + * @brief + * Cast pointer to 'struct engine *' + * to 'pointer to struct i2c_hw_engine_dce80 *' + */ +#define FROM_ENGINE(ptr) \ + FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base)) + +static void disable_i2c_hw_engine( + struct i2c_hw_engine_dce80 *engine) +{ + const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP; + uint32_t value = 0; + + struct dc_context *ctx = NULL; + + ctx = engine->base.base.base.ctx; + + value = dm_read_reg(ctx, addr); + + set_reg_field_value( + value, + 0, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_ENABLE); + + dm_write_reg(ctx, addr, value); +} + +static void release_engine( + struct engine *engine) +{ + struct i2c_hw_engine_dce80 *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 = dm_read_reg(engine->ctx, mmDC_I2C_ARBITRATION); + + set_reg_field_value( + value, + 1, + DC_I2C_ARBITRATION, + DC_I2C_SW_DONE_USING_I2C_REG); + + dm_write_reg(engine->ctx, mmDC_I2C_ARBITRATION, value); + } + + /* Reset HW engine */ + { + uint32_t i2c_sw_status = 0; + + value = dm_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 = dm_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); + + dm_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); +} + +static void destruct( + struct i2c_hw_engine_dce80 *engine) +{ + dal_i2c_hw_engine_destruct(&engine->base); +} + +static void destroy( + struct i2c_engine **i2c_engine) +{ + struct i2c_hw_engine_dce80 *engine = FROM_I2C_ENGINE(*i2c_engine); + + destruct(engine); + + kfree(engine); + + *i2c_engine = NULL; +} + +static bool setup_engine( + struct i2c_engine *i2c_engine) +{ + uint32_t value = 0; + struct i2c_hw_engine_dce80 *engine = FROM_I2C_ENGINE(i2c_engine); + + /* Program pin select */ + { + const uint32_t addr = mmDC_I2C_CONTROL; + + value = dm_read_reg(i2c_engine->base.ctx, addr); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_GO); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_SOFT_RESET); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_SEND_RESET); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_SW_STATUS_RESET); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_TRANSACTION_COUNT); + + set_reg_field_value( + value, + engine->engine_id, + DC_I2C_CONTROL, + DC_I2C_DDC_SELECT); + + dm_write_reg(i2c_engine->base.ctx, addr, value); + } + + /* Program time limit */ + { + const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP; + + value = dm_read_reg(i2c_engine->base.ctx, addr); + + set_reg_field_value( + value, + I2C_SETUP_TIME_LIMIT, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_TIME_LIMIT); + + set_reg_field_value( + value, + 1, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_ENABLE); + + dm_write_reg(i2c_engine->base.ctx, addr, value); + } + + /* Program HW priority + * set to High - interrupt software I2C at any time + * Enable restart of SW I2C that was interrupted by HW + * disable queuing of software while I2C is in use by HW */ + { + value = dm_read_reg(i2c_engine->base.ctx, + mmDC_I2C_ARBITRATION); + + set_reg_field_value( + value, + 0, + DC_I2C_ARBITRATION, + DC_I2C_NO_QUEUED_SW_GO); + + set_reg_field_value( + value, + DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_NORMAL, + DC_I2C_ARBITRATION, + DC_I2C_SW_PRIORITY); + + dm_write_reg(i2c_engine->base.ctx, + mmDC_I2C_ARBITRATION, value); + } + + return true; +} + +static uint32_t get_speed( + const struct i2c_engine *i2c_engine) +{ + const struct i2c_hw_engine_dce80 *engine = FROM_I2C_ENGINE(i2c_engine); + + const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED; + + uint32_t pre_scale = 0; + + uint32_t value = dm_read_reg(i2c_engine->base.ctx, addr); + + pre_scale = get_reg_field_value( + value, + DC_I2C_DDC1_SPEED, + DC_I2C_DDC1_PRESCALE); + + /* [anaumov] it seems following is unnecessary */ + /*ASSERT(value.bits.DC_I2C_DDC1_PRESCALE);*/ + + return pre_scale ? + engine->reference_frequency / pre_scale : + engine->base.default_speed; +} + +static void set_speed( + struct i2c_engine *i2c_engine, + uint32_t speed) +{ + struct i2c_hw_engine_dce80 *engine = FROM_I2C_ENGINE(i2c_engine); + + if (speed) { + const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED; + + uint32_t value = dm_read_reg(i2c_engine->base.ctx, addr); + + set_reg_field_value( + value, + engine->reference_frequency / speed, + DC_I2C_DDC1_SPEED, + DC_I2C_DDC1_PRESCALE); + + set_reg_field_value( + value, + 2, + DC_I2C_DDC1_SPEED, + DC_I2C_DDC1_THRESHOLD); + + dm_write_reg(i2c_engine->base.ctx, addr, value); + } +} + +static inline void reset_hw_engine(struct engine *engine) +{ + uint32_t value = dm_read_reg(engine->ctx, mmDC_I2C_CONTROL); + + 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); + + dm_write_reg(engine->ctx, mmDC_I2C_CONTROL, value); +} + +static bool is_hw_busy(struct engine *engine) +{ + uint32_t i2c_sw_status = 0; + + uint32_t value = dm_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 (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_IDLE) + return false; + + reset_hw_engine(engine); + + value = dm_read_reg(engine->ctx, mmDC_I2C_SW_STATUS); + + i2c_sw_status = get_reg_field_value( + value, + DC_I2C_SW_STATUS, + DC_I2C_SW_STATUS); + + return i2c_sw_status != DC_I2C_STATUS__DC_I2C_STATUS_IDLE; +} + +/* + * @brief + * DC_GPIO_DDC MM register offsets + */ +static const uint32_t transaction_addr[] = { + mmDC_I2C_TRANSACTION0, + mmDC_I2C_TRANSACTION1, + mmDC_I2C_TRANSACTION2, + mmDC_I2C_TRANSACTION3 +}; + +static bool process_transaction( + struct i2c_hw_engine_dce80 *engine, + struct i2c_request_transaction_data *request) +{ + uint32_t length = request->length; + uint8_t *buffer = request->data; + + bool last_transaction = false; + uint32_t value = 0; + + struct dc_context *ctx = NULL; + + ctx = engine->base.base.base.ctx; + + { + const uint32_t addr = + transaction_addr[engine->transaction_count]; + + value = dm_read_reg(ctx, addr); + + set_reg_field_value( + value, + 1, + DC_I2C_TRANSACTION0, + DC_I2C_STOP_ON_NACK0); + + set_reg_field_value( + value, + 1, + DC_I2C_TRANSACTION0, + DC_I2C_START0); + + if ((engine->transaction_count == 3) || + (request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) || + (request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)) { + + set_reg_field_value( + value, + 1, + DC_I2C_TRANSACTION0, + DC_I2C_STOP0); + + last_transaction = true; + } else + set_reg_field_value( + value, + 0, + DC_I2C_TRANSACTION0, + DC_I2C_STOP0); + + set_reg_field_value( + value, + (0 != (request->action & + I2CAUX_TRANSACTION_ACTION_I2C_READ)), + DC_I2C_TRANSACTION0, + DC_I2C_RW0); + + set_reg_field_value( + value, + length, + DC_I2C_TRANSACTION0, + DC_I2C_COUNT0); + + dm_write_reg(ctx, addr, value); + } + + /* Write the I2C address and I2C data + * into the hardware circular buffer, one byte per entry. + * As an example, the 7-bit I2C slave address for CRT monitor + * for reading DDC/EDID information is 0b1010001. + * For an I2C send operation, the LSB must be programmed to 0; + * for I2C receive operation, the LSB must be programmed to 1. */ + + { + value = 0; + + set_reg_field_value( + value, + false, + DC_I2C_DATA, + DC_I2C_DATA_RW); + + set_reg_field_value( + value, + request->address, + DC_I2C_DATA, + DC_I2C_DATA); + + if (engine->transaction_count == 0) { + set_reg_field_value( + value, + 0, + DC_I2C_DATA, + DC_I2C_INDEX); + + /*enable index write*/ + set_reg_field_value( + value, + 1, + DC_I2C_DATA, + DC_I2C_INDEX_WRITE); + } + + dm_write_reg(ctx, mmDC_I2C_DATA, value); + + if (!(request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)) { + + set_reg_field_value( + value, + 0, + DC_I2C_DATA, + DC_I2C_INDEX_WRITE); + + while (length) { + + set_reg_field_value( + value, + *buffer++, + DC_I2C_DATA, + DC_I2C_DATA); + + dm_write_reg(ctx, mmDC_I2C_DATA, value); + --length; + } + } + } + + ++engine->transaction_count; + engine->buffer_used_bytes += length + 1; + + return last_transaction; +} + +static void execute_transaction( + struct i2c_hw_engine_dce80 *engine) +{ + uint32_t value = 0; + struct dc_context *ctx = NULL; + + ctx = engine->base.base.base.ctx; + + { + const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP; + + value = dm_read_reg(ctx, addr); + + set_reg_field_value( + value, + 0, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_DATA_DRIVE_EN); + + set_reg_field_value( + value, + 0, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_CLK_DRIVE_EN); + + set_reg_field_value( + value, + 0, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_DATA_DRIVE_SEL); + + set_reg_field_value( + value, + 0, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_INTRA_TRANSACTION_DELAY); + + set_reg_field_value( + value, + 0, + DC_I2C_DDC1_SETUP, + DC_I2C_DDC1_INTRA_BYTE_DELAY); + + dm_write_reg(ctx, addr, value); + } + + { + const uint32_t addr = mmDC_I2C_CONTROL; + + value = dm_read_reg(ctx, addr); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_SOFT_RESET); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_SW_STATUS_RESET); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_SEND_RESET); + + set_reg_field_value( + value, + 0, + DC_I2C_CONTROL, + DC_I2C_GO); + + set_reg_field_value( + value, + engine->transaction_count - 1, + DC_I2C_CONTROL, + DC_I2C_TRANSACTION_COUNT); + + dm_write_reg(ctx, addr, value); + } + + /* start I2C transfer */ + { + const uint32_t addr = mmDC_I2C_CONTROL; + + value = dm_read_reg(ctx, addr); + + set_reg_field_value( + value, + 1, + DC_I2C_CONTROL, + DC_I2C_GO); + + dm_write_reg(ctx, addr, value); + } + + /* all transactions were executed and HW buffer became empty + * (even though it actually happens when status becomes DONE) */ + engine->transaction_count = 0; + engine->buffer_used_bytes = 0; +} + +static void submit_channel_request( + struct i2c_engine *engine, + struct i2c_request_transaction_data *request) +{ + request->status = I2C_CHANNEL_OPERATION_SUCCEEDED; + + if (!process_transaction(FROM_I2C_ENGINE(engine), request)) + return; + + if (is_hw_busy(&engine->base)) { + request->status = I2C_CHANNEL_OPERATION_ENGINE_BUSY; + return; + } + + execute_transaction(FROM_I2C_ENGINE(engine)); +} + +static void process_channel_reply( + struct i2c_engine *engine, + struct i2c_reply_transaction_data *reply) +{ + uint32_t length = reply->length; + uint8_t *buffer = reply->data; + + uint32_t value = 0; + + /*set index*/ + set_reg_field_value( + value, + length - 1, + DC_I2C_DATA, + DC_I2C_INDEX); + + set_reg_field_value( + value, + 1, + DC_I2C_DATA, + DC_I2C_DATA_RW); + + set_reg_field_value( + value, + 1, + DC_I2C_DATA, + DC_I2C_INDEX_WRITE); + + dm_write_reg(engine->base.ctx, mmDC_I2C_DATA, value); + + while (length) { + /* after reading the status, + * if the I2C operation executed successfully + * (i.e. DC_I2C_STATUS_DONE = 1) then the I2C controller + * should read data bytes from I2C circular data buffer */ + + value = dm_read_reg(engine->base.ctx, mmDC_I2C_DATA); + + *buffer++ = get_reg_field_value( + value, + DC_I2C_DATA, + DC_I2C_DATA); + + --length; + } +} + +static enum i2c_channel_operation_result get_channel_status( + struct i2c_engine *engine, + uint8_t *returned_bytes) +{ + uint32_t i2c_sw_status = 0; + uint32_t value = dm_read_reg(engine->base.ctx, mmDC_I2C_SW_STATUS); + + i2c_sw_status = get_reg_field_value( + value, + DC_I2C_SW_STATUS, + DC_I2C_SW_STATUS); + + if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_SW) + return I2C_CHANNEL_OPERATION_ENGINE_BUSY; + else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_STOPPED_ON_NACK_MASK) + return I2C_CHANNEL_OPERATION_NO_RESPONSE; + else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_TIMEOUT_MASK) + return I2C_CHANNEL_OPERATION_TIMEOUT; + else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_ABORTED_MASK) + return I2C_CHANNEL_OPERATION_FAILED; + else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_DONE_MASK) + return I2C_CHANNEL_OPERATION_SUCCEEDED; + + /* + * this is the case when HW used for communication, I2C_SW_STATUS + * could be zero + */ + return I2C_CHANNEL_OPERATION_SUCCEEDED; +} + +static uint32_t get_hw_buffer_available_size( + const struct i2c_hw_engine *engine) +{ + return I2C_HW_BUFFER_SIZE - + FROM_I2C_HW_ENGINE(engine)->buffer_used_bytes; +} + +static uint32_t get_transaction_timeout( + const struct i2c_hw_engine *engine, + uint32_t length) +{ + uint32_t speed = engine->base.funcs->get_speed(&engine->base); + + uint32_t period_timeout; + uint32_t num_of_clock_stretches; + + if (!speed) + return 0; + + period_timeout = (1000 * TRANSACTION_TIMEOUT_IN_I2C_CLOCKS) / speed; + + num_of_clock_stretches = 1 + (length << 3) + 1; + num_of_clock_stretches += + (FROM_I2C_HW_ENGINE(engine)->buffer_used_bytes << 3) + + (FROM_I2C_HW_ENGINE(engine)->transaction_count << 1); + + return period_timeout * num_of_clock_stretches; +} + +/* + * @brief + * DC_I2C_DDC1_SETUP MM register offsets + * + * @note + * The indices of this offset array are DDC engine IDs + */ +static const int32_t ddc_setup_offset[] = { + + mmDC_I2C_DDC1_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 1 */ + mmDC_I2C_DDC2_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 2 */ + mmDC_I2C_DDC3_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 3 */ + mmDC_I2C_DDC4_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 4 */ + mmDC_I2C_DDC5_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 5 */ + mmDC_I2C_DDC6_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 6 */ + mmDC_I2C_DDCVGA_SETUP - mmDC_I2C_DDC1_SETUP /* DDC Engine 7 */ +}; + +/* + * @brief + * DC_I2C_DDC1_SPEED MM register offsets + * + * @note + * The indices of this offset array are DDC engine IDs + */ +static const int32_t ddc_speed_offset[] = { + mmDC_I2C_DDC1_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 1 */ + mmDC_I2C_DDC2_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 2 */ + mmDC_I2C_DDC3_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 3 */ + mmDC_I2C_DDC4_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 4 */ + mmDC_I2C_DDC5_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 5 */ + mmDC_I2C_DDC6_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 6 */ + mmDC_I2C_DDCVGA_SPEED - mmDC_I2C_DDC1_SPEED /* DDC Engine 7 */ +}; + +static const struct i2c_engine_funcs i2c_engine_funcs = { + .destroy = destroy, + .get_speed = get_speed, + .set_speed = set_speed, + .setup_engine = setup_engine, + .submit_channel_request = submit_channel_request, + .process_channel_reply = process_channel_reply, + .get_channel_status = get_channel_status, + .acquire_engine = dal_i2c_hw_engine_acquire_engine, +}; + +static const struct engine_funcs engine_funcs = { + .release_engine = release_engine, + .get_engine_type = dal_i2c_hw_engine_get_engine_type, + .acquire = dal_i2c_engine_acquire, + .submit_request = dal_i2c_hw_engine_submit_request, +}; + +static const struct i2c_hw_engine_funcs i2c_hw_engine_funcs = { + .get_hw_buffer_available_size = + get_hw_buffer_available_size, + .get_transaction_timeout = + get_transaction_timeout, + .wait_on_operation_result = + dal_i2c_hw_engine_wait_on_operation_result, +}; + +static void construct( + struct i2c_hw_engine_dce80 *engine, + const struct i2c_hw_engine_dce80_create_arg *arg) +{ + dal_i2c_hw_engine_construct(&engine->base, arg->ctx); + + engine->base.base.base.funcs = &engine_funcs; + engine->base.base.funcs = &i2c_engine_funcs; + engine->base.funcs = &i2c_hw_engine_funcs; + engine->base.default_speed = arg->default_speed; + engine->addr.DC_I2C_DDCX_SETUP = + mmDC_I2C_DDC1_SETUP + ddc_setup_offset[arg->engine_id]; + engine->addr.DC_I2C_DDCX_SPEED = + mmDC_I2C_DDC1_SPEED + ddc_speed_offset[arg->engine_id]; + + engine->engine_id = arg->engine_id; + engine->reference_frequency = arg->reference_frequency; + engine->buffer_used_bytes = 0; + engine->transaction_count = 0; + engine->engine_keep_power_up_count = 1; +} + +struct i2c_engine *dal_i2c_hw_engine_dce80_create( + const struct i2c_hw_engine_dce80_create_arg *arg) +{ + struct i2c_hw_engine_dce80 *engine; + + if (!arg) { + BREAK_TO_DEBUGGER(); + return NULL; + } + + if ((arg->engine_id >= sizeof(ddc_setup_offset) / sizeof(int32_t)) || + (arg->engine_id >= sizeof(ddc_speed_offset) / sizeof(int32_t)) || + !arg->reference_frequency) { + BREAK_TO_DEBUGGER(); + return NULL; + } + + engine = kzalloc(sizeof(struct i2c_hw_engine_dce80), GFP_KERNEL); + + if (!engine) { + BREAK_TO_DEBUGGER(); + return NULL; + } + + construct(engine, arg); + return &engine->base.base; +} |