1 files changed, 0 insertions, 574 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2c_hw_engine_dce110.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2c_hw_engine_dce110.c
deleted file mode 100644
index 9cbe1a7a6bcb..000000000000
--- a/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2c_hw_engine_dce110.c
+++ /dev/null
@@ -1,574 +0,0 @@
-/*
- * 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"
-#include "include/logger_interface.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_dce110.h"
-
-/*
- * Post-requisites: headers required by this unit
- */
-#include "reg_helper.h"
-
-/*
- * This unit
- */
-#define DC_LOGGER \
-		hw_engine->base.base.base.ctx->logger
-
-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
-};
-
-
-
-/*
- * @brief
- * Cast pointer to 'struct i2c_hw_engine *'
- * to pointer 'struct i2c_hw_engine_dce110 *'
- */
-#define FROM_I2C_HW_ENGINE(ptr) \
-	container_of((ptr), struct i2c_hw_engine_dce110, base)
-/*
- * @brief
- * Cast pointer to 'struct i2c_engine *'
- * to pointer to 'struct i2c_hw_engine_dce110 *'
- */
-#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_dce110 *'
- */
-#define FROM_ENGINE(ptr) \
-	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
-
-#define CTX \
-		hw_engine->base.base.base.ctx
-
-#define REG(reg_name)\
-	(hw_engine->regs->reg_name)
-
-#undef FN
-#define FN(reg_name, field_name) \
-	hw_engine->i2c_shift->field_name, hw_engine->i2c_mask->field_name
-
-#include "reg_helper.h"
-
-static void disable_i2c_hw_engine(
-	struct i2c_hw_engine_dce110 *hw_engine)
-{
-	REG_UPDATE_N(SETUP, 1, FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 0);
-}
-
-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 bool setup_engine(
-	struct i2c_engine *i2c_engine)
-{
-	struct i2c_hw_engine_dce110 *hw_engine = FROM_I2C_ENGINE(i2c_engine);
-	uint32_t i2c_setup_limit = I2C_SETUP_TIME_LIMIT_DCE;
-	uint32_t  reset_length = 0;
-
-	if (hw_engine->base.base.setup_limit != 0)
-		i2c_setup_limit = hw_engine->base.base.setup_limit;
-
-	/* Program pin select */
-	REG_UPDATE_6(
-			DC_I2C_CONTROL,
-			DC_I2C_GO, 0,
-			DC_I2C_SOFT_RESET, 0,
-			DC_I2C_SEND_RESET, 0,
-			DC_I2C_SW_STATUS_RESET, 1,
-			DC_I2C_TRANSACTION_COUNT, 0,
-			DC_I2C_DDC_SELECT, hw_engine->engine_id);
-
-	/* Program time limit */
-	if (hw_engine->base.base.send_reset_length == 0) {
-		/*pre-dcn*/
-		REG_UPDATE_N(
-				SETUP, 2,
-				FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_TIME_LIMIT), i2c_setup_limit,
-				FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 1);
-	} else {
-		reset_length = hw_engine->base.base.send_reset_length;
-	}
-	/* 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 */
-	REG_UPDATE_2(
-			DC_I2C_ARBITRATION,
-			DC_I2C_NO_QUEUED_SW_GO, 0,
-			DC_I2C_SW_PRIORITY, DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_NORMAL);
-
-	return true;
-}
-
-static uint32_t get_speed(
-	const struct i2c_engine *i2c_engine)
-{
-	const struct i2c_hw_engine_dce110 *hw_engine = FROM_I2C_ENGINE(i2c_engine);
-	uint32_t pre_scale = 0;
-
-	REG_GET(SPEED, DC_I2C_DDC1_PRESCALE, &pre_scale);
-
-	/* [anaumov] it seems following is unnecessary */
-	/*ASSERT(value.bits.DC_I2C_DDC1_PRESCALE);*/
-	return pre_scale ?
-		hw_engine->reference_frequency / pre_scale :
-		hw_engine->base.default_speed;
-}
-
-static void set_speed(
-	struct i2c_engine *i2c_engine,
-	uint32_t speed)
-{
-	struct i2c_hw_engine_dce110 *hw_engine = FROM_I2C_ENGINE(i2c_engine);
-
-	if (speed) {
-		if (hw_engine->i2c_mask->DC_I2C_DDC1_START_STOP_TIMING_CNTL)
-			REG_UPDATE_N(
-				SPEED, 3,
-				FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), hw_engine->reference_frequency / speed,
-				FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_THRESHOLD), 2,
-				FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_START_STOP_TIMING_CNTL), speed > 50 ? 2:1);
-		else
-			REG_UPDATE_N(
-				SPEED, 2,
-				FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), hw_engine->reference_frequency / speed,
-				FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_THRESHOLD), 2);
-	}
-}
-
-static inline void reset_hw_engine(struct engine *engine)
-{
-	struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
-
-	REG_UPDATE_2(
-			DC_I2C_CONTROL,
-			DC_I2C_SW_STATUS_RESET, 1,
-			DC_I2C_SW_STATUS_RESET, 1);
-}
-
-static bool is_hw_busy(struct engine *engine)
-{
-	struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
-	uint32_t i2c_sw_status = 0;
-
-	REG_GET(DC_I2C_SW_STATUS, DC_I2C_SW_STATUS, &i2c_sw_status);
-	if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_IDLE)
-		return false;
-
-	reset_hw_engine(engine);
-
-	REG_GET(DC_I2C_SW_STATUS, DC_I2C_SW_STATUS, &i2c_sw_status);
-	return i2c_sw_status != DC_I2C_STATUS__DC_I2C_STATUS_IDLE;
-}
-
-
-#define STOP_TRANS_PREDICAT \
-		((hw_engine->transaction_count == 3) ||	\
-				(request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) ||	\
-				(request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ))
-
-#define SET_I2C_TRANSACTION(id)	\
-		do {	\
-			REG_UPDATE_N(DC_I2C_TRANSACTION##id, 5,	\
-				FN(DC_I2C_TRANSACTION0, DC_I2C_STOP_ON_NACK0), 1,	\
-				FN(DC_I2C_TRANSACTION0, DC_I2C_START0), 1,	\
-				FN(DC_I2C_TRANSACTION0, DC_I2C_STOP0), STOP_TRANS_PREDICAT ? 1:0,	\
-				FN(DC_I2C_TRANSACTION0, DC_I2C_RW0), (0 != (request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)),	\
-				FN(DC_I2C_TRANSACTION0, DC_I2C_COUNT0), length);	\
-				if (STOP_TRANS_PREDICAT)	\
-					last_transaction = true;	\
-		} while (false)
-
-
-static bool process_transaction(
-	struct i2c_hw_engine_dce110 *hw_engine,
-	struct i2c_request_transaction_data *request)
-{
-	uint32_t length = request->length;
-	uint8_t *buffer = request->data;
-	uint32_t value = 0;
-
-	bool last_transaction = false;
-
-	struct dc_context *ctx = NULL;
-
-	ctx = hw_engine->base.base.base.ctx;
-
-
-
-	switch (hw_engine->transaction_count) {
-	case 0:
-		SET_I2C_TRANSACTION(0);
-		break;
-	case 1:
-		SET_I2C_TRANSACTION(1);
-		break;
-	case 2:
-		SET_I2C_TRANSACTION(2);
-		break;
-	case 3:
-		SET_I2C_TRANSACTION(3);
-		break;
-	default:
-		/* TODO Warning ? */
-		break;
-	}
-
-
-	/* 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. */
-	if (hw_engine->transaction_count == 0) {
-		value = REG_SET_4(DC_I2C_DATA, 0,
-				  DC_I2C_DATA_RW, false,
-				  DC_I2C_DATA, request->address,
-				  DC_I2C_INDEX, 0,
-				  DC_I2C_INDEX_WRITE, 1);
-		hw_engine->buffer_used_write = 0;
-	} else
-		value = REG_SET_2(DC_I2C_DATA, 0,
-				  DC_I2C_DATA_RW, false,
-				  DC_I2C_DATA, request->address);
-
-	hw_engine->buffer_used_write++;
-
-	if (!(request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)) {
-		while (length) {
-			REG_SET_2(DC_I2C_DATA, value,
-					DC_I2C_INDEX_WRITE, 0,
-					DC_I2C_DATA, *buffer++);
-			hw_engine->buffer_used_write++;
-			--length;
-		}
-	}
-
-	++hw_engine->transaction_count;
-	hw_engine->buffer_used_bytes += length + 1;
-
-	return last_transaction;
-}
-
-static void execute_transaction(
-	struct i2c_hw_engine_dce110 *hw_engine)
-{
-	REG_UPDATE_N(SETUP, 5,
-		FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_DATA_DRIVE_EN), 0,
-		FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_CLK_DRIVE_EN), 0,
-		FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_DATA_DRIVE_SEL), 0,
-		FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_INTRA_TRANSACTION_DELAY), 0,
-		FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_INTRA_BYTE_DELAY), 0);
-
-
-	REG_UPDATE_5(DC_I2C_CONTROL,
-		DC_I2C_SOFT_RESET, 0,
-		DC_I2C_SW_STATUS_RESET, 0,
-		DC_I2C_SEND_RESET, 0,
-		DC_I2C_GO, 0,
-		DC_I2C_TRANSACTION_COUNT, hw_engine->transaction_count - 1);
-
-	/* start I2C transfer */
-	REG_UPDATE(DC_I2C_CONTROL, DC_I2C_GO, 1);
-
-	/* all transactions were executed and HW buffer became empty
-	 * (even though it actually happens when status becomes DONE) */
-	hw_engine->transaction_count = 0;
-	hw_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;
-
-	struct i2c_hw_engine_dce110 *hw_engine =
-		FROM_I2C_ENGINE(engine);
-
-
-	REG_SET_3(DC_I2C_DATA, 0,
-			DC_I2C_INDEX, hw_engine->buffer_used_write,
-			DC_I2C_DATA_RW, 1,
-			DC_I2C_INDEX_WRITE, 1);
-
-	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 */
-
-		uint32_t i2c_data;
-
-		REG_GET(DC_I2C_DATA, DC_I2C_DATA, &i2c_data);
-		*buffer++ = i2c_data;
-
-		--length;
-	}
-}
-
-static enum i2c_channel_operation_result get_channel_status(
-	struct i2c_engine *i2c_engine,
-	uint8_t *returned_bytes)
-{
-	uint32_t i2c_sw_status = 0;
-	struct i2c_hw_engine_dce110 *hw_engine = FROM_I2C_ENGINE(i2c_engine);
-	uint32_t value =
-			REG_GET(DC_I2C_SW_STATUS, DC_I2C_SW_STATUS, &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 & hw_engine->i2c_mask->DC_I2C_SW_STOPPED_ON_NACK)
-		return I2C_CHANNEL_OPERATION_NO_RESPONSE;
-	else if (value & hw_engine->i2c_mask->DC_I2C_SW_TIMEOUT)
-		return I2C_CHANNEL_OPERATION_TIMEOUT;
-	else if (value & hw_engine->i2c_mask->DC_I2C_SW_ABORTED)
-		return I2C_CHANNEL_OPERATION_FAILED;
-	else if (value & hw_engine->i2c_mask->DC_I2C_SW_DONE)
-		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;
-}
-
-static void destroy(
-	struct i2c_engine **i2c_engine)
-{
-	struct i2c_hw_engine_dce110 *engine_dce110 =
-			FROM_I2C_ENGINE(*i2c_engine);
-
-	dal_i2c_hw_engine_destruct(&engine_dce110->base);
-
-	kfree(engine_dce110);
-
-	*i2c_engine = NULL;
-}
-
-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_dce110 *hw_engine,
-	const struct i2c_hw_engine_dce110_create_arg *arg)
-{
-	uint32_t xtal_ref_div = 0;
-
-	dal_i2c_hw_engine_construct(&hw_engine->base, arg->ctx);
-
-	hw_engine->base.base.base.funcs = &engine_funcs;
-	hw_engine->base.base.funcs = &i2c_engine_funcs;
-	hw_engine->base.funcs = &i2c_hw_engine_funcs;
-	hw_engine->base.default_speed = arg->default_speed;
-
-	hw_engine->regs = arg->regs;
-	hw_engine->i2c_shift = arg->i2c_shift;
-	hw_engine->i2c_mask = arg->i2c_mask;
-
-	hw_engine->engine_id = arg->engine_id;
-
-	hw_engine->buffer_used_bytes = 0;
-	hw_engine->transaction_count = 0;
-	hw_engine->engine_keep_power_up_count = 1;
-
-
-	REG_GET(MICROSECOND_TIME_BASE_DIV, XTAL_REF_DIV, &xtal_ref_div);
-
-	if (xtal_ref_div == 0) {
-		DC_LOG_WARNING("Invalid base timer divider [%s]\n",
-				__func__);
-		xtal_ref_div = 2;
-	}
-
-	/*Calculating Reference Clock by divding original frequency by
-	 * XTAL_REF_DIV.
-	 * At upper level, uint32_t reference_frequency =
-	 *  dal_i2caux_get_reference_clock(as) >> 1
-	 *  which already divided by 2. So we need x2 to get original
-	 *  reference clock from ppll_info
-	 */
-	hw_engine->reference_frequency =
-		(arg->reference_frequency * 2) / xtal_ref_div;
-}
-
-struct i2c_engine *dal_i2c_hw_engine_dce110_create(
-	const struct i2c_hw_engine_dce110_create_arg *arg)
-{
-	struct i2c_hw_engine_dce110 *engine_dce10;
-
-	if (!arg) {
-		ASSERT_CRITICAL(false);
-		return NULL;
-	}
-	if (!arg->reference_frequency) {
-		ASSERT_CRITICAL(false);
-		return NULL;
-	}
-
-	engine_dce10 = kzalloc(sizeof(struct i2c_hw_engine_dce110),
-			       GFP_KERNEL);
-
-	if (!engine_dce10) {
-		ASSERT_CRITICAL(false);
-		return NULL;
-	}
-
-	construct(engine_dce10, arg);
-	return &engine_dce10->base.base;
-}