/*
 * 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 "../i2caux.h"
#include "../engine.h"
#include "../i2c_engine.h"
#include "../i2c_sw_engine.h"
#include "../i2c_hw_engine.h"

/*
 * Header of this unit
 */
#include "i2caux_dce110.h"

#include "i2c_sw_engine_dce110.h"
#include "i2c_hw_engine_dce110.h"
#include "aux_engine_dce110.h"
#include "../../dc.h"
#include "dc_types.h"


/*
 * Post-requisites: headers required by this unit
 */

/*
 * This unit
 */
/*cast pointer to struct i2caux TO pointer to struct i2caux_dce110*/
#define FROM_I2C_AUX(ptr) \
	container_of((ptr), struct i2caux_dce110, base)

static void destruct(
	struct i2caux_dce110 *i2caux_dce110)
{
	dal_i2caux_destruct(&i2caux_dce110->base);
}

static void destroy(
	struct i2caux **i2c_engine)
{
	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(*i2c_engine);

	destruct(i2caux_dce110);

	kfree(i2caux_dce110);

	*i2c_engine = NULL;
}

static struct i2c_engine *acquire_i2c_hw_engine(
	struct i2caux *i2caux,
	struct ddc *ddc)
{
	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);

	struct i2c_engine *engine = NULL;
	/* generic hw engine is not used for EDID read
	 * It may be needed for external i2c device, like thermal chip,
	 * TODO will be implemented when needed.
	 * check dce80 bool non_generic for generic hw engine;
	 */

	if (!ddc)
		return NULL;

	if (ddc->hw_info.hw_supported) {
		enum gpio_ddc_line line = dal_ddc_get_line(ddc);

		if (line < GPIO_DDC_LINE_COUNT)
			engine = i2caux->i2c_hw_engines[line];
	}

	if (!engine)
		return NULL;

	if (!i2caux_dce110->i2c_hw_buffer_in_use &&
		engine->base.funcs->acquire(&engine->base, ddc)) {
		i2caux_dce110->i2c_hw_buffer_in_use = true;
		return engine;
	}

	return NULL;
}

static void release_engine(
	struct i2caux *i2caux,
	struct engine *engine)
{
	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);

	if (engine->funcs->get_engine_type(engine) ==
		I2CAUX_ENGINE_TYPE_I2C_DDC_HW)
		i2caux_dce110->i2c_hw_buffer_in_use = false;

	dal_i2caux_release_engine(i2caux, engine);
}

static const enum gpio_ddc_line hw_ddc_lines[] = {
	GPIO_DDC_LINE_DDC1,
	GPIO_DDC_LINE_DDC2,
	GPIO_DDC_LINE_DDC3,
	GPIO_DDC_LINE_DDC4,
	GPIO_DDC_LINE_DDC5,
	GPIO_DDC_LINE_DDC6,
};

static const enum gpio_ddc_line hw_aux_lines[] = {
	GPIO_DDC_LINE_DDC1,
	GPIO_DDC_LINE_DDC2,
	GPIO_DDC_LINE_DDC3,
	GPIO_DDC_LINE_DDC4,
	GPIO_DDC_LINE_DDC5,
	GPIO_DDC_LINE_DDC6,
};

/* function table */
static const struct i2caux_funcs i2caux_funcs = {
	.destroy = destroy,
	.acquire_i2c_hw_engine = acquire_i2c_hw_engine,
	.release_engine = release_engine,
	.acquire_i2c_sw_engine = dal_i2caux_acquire_i2c_sw_engine,
	.acquire_aux_engine = dal_i2caux_acquire_aux_engine,
};

#include "dce/dce_11_0_d.h"
#include "dce/dce_11_0_sh_mask.h"

/* set register offset */
#define SR(reg_name)\
	.reg_name = mm ## reg_name

/* set register offset with instance */
#define SRI(reg_name, block, id)\
	.reg_name = mm ## block ## id ## _ ## reg_name

#define aux_regs(id)\
[id] = {\
	AUX_COMMON_REG_LIST(id), \
	.AUX_RESET_MASK = AUX_CONTROL__AUX_RESET_MASK \
}

#define hw_engine_regs(id)\
{\
		I2C_HW_ENGINE_COMMON_REG_LIST(id) \
}

static const struct dce110_aux_registers dce110_aux_regs[] = {
		aux_regs(0),
		aux_regs(1),
		aux_regs(2),
		aux_regs(3),
		aux_regs(4),
		aux_regs(5)
};

static const struct dce110_i2c_hw_engine_registers i2c_hw_engine_regs[] = {
		hw_engine_regs(1),
		hw_engine_regs(2),
		hw_engine_regs(3),
		hw_engine_regs(4),
		hw_engine_regs(5),
		hw_engine_regs(6)
};

static const struct dce110_i2c_hw_engine_shift i2c_shift = {
		I2C_COMMON_MASK_SH_LIST_DCE110(__SHIFT)
};

static const struct dce110_i2c_hw_engine_mask i2c_mask = {
		I2C_COMMON_MASK_SH_LIST_DCE110(_MASK)
};

void dal_i2caux_dce110_construct(
	struct i2caux_dce110 *i2caux_dce110,
	struct dc_context *ctx,
	unsigned int num_i2caux_inst,
	const struct dce110_aux_registers aux_regs[],
	const struct dce110_i2c_hw_engine_registers i2c_hw_engine_regs[],
	const struct dce110_i2c_hw_engine_shift *i2c_shift,
	const struct dce110_i2c_hw_engine_mask *i2c_mask)
{
	uint32_t i = 0;
	uint32_t reference_frequency = 0;
	bool use_i2c_sw_engine = false;
	struct i2caux *base = NULL;
	/*TODO: For CZ bring up, if dal_i2caux_get_reference_clock
	 * does not return 48KHz, we need hard coded for 48Khz.
	 * Some BIOS setting incorrect cause this
	 * For production, we always get value from BIOS*/
	reference_frequency =
		dal_i2caux_get_reference_clock(ctx->dc_bios) >> 1;

	base = &i2caux_dce110->base;

	dal_i2caux_construct(base, ctx);

	i2caux_dce110->base.funcs = &i2caux_funcs;
	i2caux_dce110->i2c_hw_buffer_in_use = false;
	/* Create I2C engines (DDC lines per connector)
	 * different I2C/AUX usage cases, DDC, Generic GPIO, AUX.
	 */
	do {
		enum gpio_ddc_line line_id = hw_ddc_lines[i];

		struct i2c_hw_engine_dce110_create_arg hw_arg_dce110;

		if (use_i2c_sw_engine) {
			struct i2c_sw_engine_dce110_create_arg sw_arg;

			sw_arg.engine_id = i;
			sw_arg.default_speed = base->default_i2c_sw_speed;
			sw_arg.ctx = ctx;
			base->i2c_sw_engines[line_id] =
				dal_i2c_sw_engine_dce110_create(&sw_arg);
		}

		hw_arg_dce110.engine_id = i;
		hw_arg_dce110.reference_frequency = reference_frequency;
		hw_arg_dce110.default_speed = base->default_i2c_hw_speed;
		hw_arg_dce110.ctx = ctx;
		hw_arg_dce110.regs = &i2c_hw_engine_regs[i];
		hw_arg_dce110.i2c_shift = i2c_shift;
		hw_arg_dce110.i2c_mask = i2c_mask;

		base->i2c_hw_engines[line_id] =
			dal_i2c_hw_engine_dce110_create(&hw_arg_dce110);
		if (base->i2c_hw_engines[line_id] != NULL) {
			switch (ctx->dce_version) {
			case DCN_VERSION_1_0:
				base->i2c_hw_engines[line_id]->setup_limit =
					I2C_SETUP_TIME_LIMIT_DCN;
				base->i2c_hw_engines[line_id]->send_reset_length  = 0;
			break;
			default:
				base->i2c_hw_engines[line_id]->setup_limit =
					I2C_SETUP_TIME_LIMIT_DCE;
				base->i2c_hw_engines[line_id]->send_reset_length  = 0;
				break;
			}
		}
		++i;
	} while (i < num_i2caux_inst);

	/* Create AUX engines for all lines which has assisted HW AUX
	 * 'i' (loop counter) used as DDC/AUX engine_id */

	i = 0;

	do {
		enum gpio_ddc_line line_id = hw_aux_lines[i];

		struct aux_engine_dce110_init_data aux_init_data;

		aux_init_data.engine_id = i;
		aux_init_data.timeout_period = base->aux_timeout_period;
		aux_init_data.ctx = ctx;
		aux_init_data.regs = &aux_regs[i];

		base->aux_engines[line_id] =
			dal_aux_engine_dce110_create(&aux_init_data);

		++i;
	} while (i < num_i2caux_inst);

	/*TODO Generic I2C SW and HW*/
}

/*
 * dal_i2caux_dce110_create
 *
 * @brief
 * public interface to allocate memory for DCE11 I2CAUX
 *
 * @param
 * struct adapter_service *as - [in]
 * struct dc_context *ctx - [in]
 *
 * @return
 * pointer to the base struct of DCE11 I2CAUX
 */
struct i2caux *dal_i2caux_dce110_create(
	struct dc_context *ctx)
{
	struct i2caux_dce110 *i2caux_dce110 =
		kzalloc(sizeof(struct i2caux_dce110), GFP_KERNEL);

	if (!i2caux_dce110) {
		ASSERT_CRITICAL(false);
		return NULL;
	}

	dal_i2caux_dce110_construct(i2caux_dce110,
				    ctx,
				    ARRAY_SIZE(dce110_aux_regs),
				    dce110_aux_regs,
				    i2c_hw_engine_regs,
				    &i2c_shift,
				    &i2c_mask);
	return &i2caux_dce110->base;
}