/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name of The Linux Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <debug.h>
#include <string.h>
#include <smem.h>
#include <err.h>
#include <msm_panel.h>
#include <mipi_dsi.h>
#include <pm8x41.h>
#include <pm8x41_wled.h>
#include <qpnp_wled.h>
#include <board.h>
#include <mdp5.h>
#include <scm.h>
#include <regulator.h>
#include <platform/clock.h>
#include <platform/gpio.h>
#include <platform/iomap.h>
#include <target/display.h>
#include <qtimer.h>

#include "include/panel.h"
#include "include/display_resource.h"
#include "gcdb_display.h"
#include <lge_bootmode.h>
#include <platform/gpio.h>

/*---------------------------------------------------------------------------*/
/* GPIO configuration                                                        */
/*---------------------------------------------------------------------------*/
static struct gpio_pin reset_gpio = {
  "msmgpio", 0, 3, 1, 0, 1
};

static struct gpio_pin enable_gpio = {
  "msmgpio", 90, 3, 1, 0, 1
};

static struct gpio_pin vio_ldo_en_gpio = {
  "msmgpio", 63, 3, 1, 0, 1
};

#define VCO_DELAY_USEC 1000
#define GPIO_STATE_LOW 0
#define GPIO_STATE_HIGH 2
#define RESET_GPIO_SEQ_LEN 3
#define PMIC_WLED_SLAVE_ID 3

static void mdss_dsi_uniphy_pll_sw_reset_8952(uint32_t pll_base)
{
	writel(0x01, pll_base + 0x0068); /* PLL TEST CFG */
	mdelay(1);
	writel(0x00, pll_base + 0x0068); /* PLL TEST CFG */
	mdelay(1);
}

static void dsi_pll_toggle_lock_detect_8952(uint32_t pll_base)
{
	writel(0x04, pll_base + 0x0064); /* LKDetect CFG2 */
	udelay(1);
	writel(0x05, pll_base + 0x0064); /* LKDetect CFG2 */
	udelay(512);
}

static void dsi_pll_sw_reset_8952(uint32_t pll_base)
{
	writel(0x01, pll_base + 0x0068); /* PLL TEST CFG */
	udelay(1);
	writel(0x00, pll_base + 0x0068); /* PLL TEST CFG */
}

static uint32_t gf_1_dsi_pll_enable_sequence_8952(uint32_t pll_base)
{
	uint32_t rc;

	dsi_pll_sw_reset_8952(pll_base);

	/*
	 * Add hardware recommended delays between register writes for
	 * the updates to take effect. These delays are necessary for the
	 * PLL to successfully lock
	 */
	writel(0x14, pll_base + 0x0070); /* CAL CFG1*/
	writel(0x01, pll_base + 0x0020); /* GLB CFG */
	writel(0x05, pll_base + 0x0020); /* GLB CFG */
	udelay(3);
	writel(0x0f, pll_base + 0x0020); /* GLB CFG */
	udelay(500);

	dsi_pll_toggle_lock_detect_8952(pll_base);
	rc = readl(pll_base + 0x00c0) & 0x01;

	return rc;
}

static uint32_t gf_2_dsi_pll_enable_sequence_8952(uint32_t pll_base)
{
	uint32_t rc;

	dsi_pll_sw_reset_8952(pll_base);

	/*
	 * Add hardware recommended delays between register writes for
	 * the updates to take effect. These delays are necessary for the
	 * PLL to successfully lock
	 */
	writel(0x04, pll_base + 0x0070); /* CAL CFG1*/
	writel(0x01, pll_base + 0x0020); /* GLB CFG */
	writel(0x05, pll_base + 0x0020); /* GLB CFG */
	udelay(3);
	writel(0x0f, pll_base + 0x0020); /* GLB CFG */
	udelay(500);

	dsi_pll_toggle_lock_detect_8952(pll_base);
	rc = readl(pll_base + 0x00c0) & 0x01;

	return rc;
}

static uint32_t tsmc_dsi_pll_enable_sequence_8952(uint32_t pll_base)
{
	uint32_t rc;

	dsi_pll_sw_reset_8952(pll_base);
	/*
	 * Add hardware recommended delays between register writes for
	 * the updates to take effect. These delays are necessary for the
	 * PLL to successfully lock
	 */

	writel(0x34, pll_base + 0x0070); /* CAL CFG1*/
	writel(0x01, pll_base + 0x0020); /* GLB CFG */
	writel(0x05, pll_base + 0x0020); /* GLB CFG */
	writel(0x0f, pll_base + 0x0020); /* GLB CFG */
	udelay(500);

	dsi_pll_toggle_lock_detect_8952(pll_base);
	rc = readl(pll_base + 0x00c0) & 0x01;

	return rc;
}


static uint32_t dsi_pll_enable_seq_8952(uint32_t pll_base)
{
	uint32_t pll_locked = 0;
	uint32_t counter = 0;

	do {
		pll_locked = tsmc_dsi_pll_enable_sequence_8952(pll_base);

		dprintf(SPEW, "TSMC pll locked status is %d\n", pll_locked);
		++counter;
	} while (!pll_locked && (counter < 3));

	if(!pll_locked) {
		counter = 0;
		do {
			pll_locked = gf_1_dsi_pll_enable_sequence_8952(pll_base);

			dprintf(SPEW, "GF P1 pll locked status is %d\n", pll_locked);
			++counter;
		} while (!pll_locked && (counter < 3));
	}

	if(!pll_locked) {
		counter = 0;
		do {
			pll_locked = gf_2_dsi_pll_enable_sequence_8952(pll_base);

			dprintf(SPEW, "GF P2 pll locked status is %d\n", pll_locked);
			++counter;
		} while (!pll_locked && (counter < 3));
	}

	return pll_locked;
}

static int msm8952_wled_backlight_ctrl(uint8_t enable)
{
	qpnp_wled_enable_backlight(enable);
	return NO_ERROR;
}

int target_backlight_ctrl(struct backlight *bl, uint8_t enable)
{
	uint32_t ret = NO_ERROR;

	if (bl->bl_interface_type == BL_DCS)
		return ret;

	dprintf(INFO, "%s: enable=%d, bl_type=%d\n",
			__func__, enable, bl->bl_interface_type);

	ret = msm8952_wled_backlight_ctrl(enable);

	return ret;
}

int target_panel_clock(uint8_t enable, struct msm_panel_info *pinfo)
{
	int32_t ret = 0;
	struct mdss_dsi_pll_config *pll_data;
	dprintf(SPEW, "target_panel_clock\n");

	pll_data = pinfo->mipi.dsi_pll_config;
	pll_data->vco_delay = VCO_DELAY_USEC;

	if (enable) {
		mdp_gdsc_ctrl(enable);
		mdss_bus_clocks_enable();
		mdp_clock_enable();
		ret = restore_secure_cfg(SECURE_DEVICE_MDSS);
		if (ret) {
			dprintf(CRITICAL,
				"%s: Failed to restore MDP security configs",
				__func__);
			mdp_clock_disable();
			mdss_bus_clocks_disable();
			mdp_gdsc_ctrl(0);
			return ret;
		}
		mdss_dsi_uniphy_pll_sw_reset_8952(DSI0_PLL_BASE);
		mdss_dsi_auto_pll_config(pinfo->mipi.pll_base,
						pinfo->mipi.ctl_base, pll_data);
		if (!dsi_pll_enable_seq_8952(pinfo->mipi.pll_base))
			dprintf(CRITICAL, "Not able to enable the pll\n");
		gcc_dsi_clocks_enable(pll_data->pclk_m, pll_data->pclk_n,
				pll_data->pclk_d);
	} else if(!target_cont_splash_screen()) {
		gcc_dsi_clocks_disable();
		mdp_clock_disable();
		mdss_bus_clocks_disable();
		mdp_gdsc_ctrl(enable);
	}

	return 0;
}

int target_panel_reset(uint8_t enable, struct panel_reset_sequence *resetseq,
						struct msm_panel_info *pinfo)
{
	int ret = NO_ERROR;

	if (enable) {
		if (pinfo->mipi.use_enable_gpio) {
			gpio_tlmm_config(enable_gpio.pin_id, 0,
				enable_gpio.pin_direction, enable_gpio.pin_pull,
				enable_gpio.pin_strength,
				enable_gpio.pin_state);

			gpio_set_dir(enable_gpio.pin_id, 2);
		}
		dprintf(INFO, "%s: reset_gpio_id: %d\n", __func__, reset_gpio.pin_id);
		gpio_tlmm_config(reset_gpio.pin_id, 0,
				reset_gpio.pin_direction, reset_gpio.pin_pull,
				reset_gpio.pin_strength, reset_gpio.pin_state);

		gpio_set_dir(reset_gpio.pin_id, 2);

		/* reset */
		for (int i = 0; i < RESET_GPIO_SEQ_LEN; i++) {
			if (resetseq->pin_state[i] == GPIO_STATE_LOW)
				gpio_set_dir(reset_gpio.pin_id, GPIO_STATE_LOW);
			else
				gpio_set_dir(reset_gpio.pin_id, GPIO_STATE_HIGH);
			mdelay(resetseq->sleep[i]);
		}
	} else if(!target_cont_splash_screen()) {
		if (pinfo->mipi.use_enable_gpio)
			gpio_set_dir(enable_gpio.pin_id, 0);
	}

	return ret;
}

static void wled_init(struct msm_panel_info *pinfo)
{
	struct qpnp_wled_config_data config = {0};
	struct labibb_desc *labibb;
	int display_type = 0;

	labibb = pinfo->labibb;

	if (labibb)
		display_type = labibb->amoled_panel;

	config.display_type = display_type;
	config.lab_init_volt = 4600000;	/* fixed, see pmi register */
	config.ibb_init_volt = 1400000;	/* fixed, see pmi register */

	if (labibb && labibb->force_config) {
		config.lab_min_volt = labibb->lab_min_volt;
		config.lab_max_volt = labibb->lab_max_volt;
		config.ibb_min_volt = labibb->ibb_min_volt;
		config.ibb_max_volt = labibb->ibb_max_volt;
		config.pwr_up_delay = labibb->pwr_up_delay;
		config.pwr_down_delay = labibb->pwr_down_delay;
		config.ibb_discharge_en = labibb->ibb_discharge_en;
	} else {
		/* default */
		config.pwr_up_delay = 3;
		config.pwr_down_delay =  3;
		config.ibb_discharge_en = 1;
		if (display_type) {	/* amoled */
			config.lab_min_volt = 4600000;
			config.lab_max_volt = 4600000;
			config.ibb_min_volt = 4000000;
			config.ibb_max_volt = 4000000;
		} else { /* lcd */
			config.lab_min_volt = 5500000;
			config.lab_max_volt = 5500000;
			config.ibb_min_volt = 5500000;
			config.ibb_max_volt = 5500000;
		}
	}

	dprintf(SPEW, "%s: %d %d %d %d %d %d %d %d %d %d\n", __func__,
		config.display_type,
		config.lab_min_volt, config.lab_max_volt,
		config.ibb_min_volt, config.ibb_max_volt,
		config.lab_init_volt, config.ibb_init_volt,
		config.pwr_up_delay, config.pwr_down_delay,
		config.ibb_discharge_en);

	/* QPNP WLED init for display backlight */
	pm8x41_wled_config_slave_id(PMIC_WLED_SLAVE_ID);

	qpnp_wled_init(&config);
}

int target_dsi_phy_config(struct mdss_dsi_phy_ctrl *phy_db)
{
	memcpy(phy_db->regulator, panel_regulator_settings, REGULATOR_SIZE);
	memcpy(phy_db->ctrl, panel_physical_ctrl, PHYSICAL_SIZE);
	memcpy(phy_db->strength, panel_strength_ctrl, STRENGTH_SIZE);
	memcpy(phy_db->bistCtrl, panel_bist_ctrl, BIST_SIZE);
	memcpy(phy_db->laneCfg, panel_lane_config, LANE_SIZE);
	return NO_ERROR;
}

int target_ldo_ctrl(uint8_t enable, struct msm_panel_info *pinfo)
{

	if (enable) {
		regulator_enable(REG_LDO2 | REG_LDO6);
		mdelay(10);
		wled_init(pinfo);
		gpio_tlmm_config(vio_ldo_en_gpio.pin_id, 0,
				vio_ldo_en_gpio.pin_direction, vio_ldo_en_gpio.pin_pull,
				vio_ldo_en_gpio.pin_strength, vio_ldo_en_gpio.pin_state);

		gpio_set_dir(vio_ldo_en_gpio.pin_id, 2);
		mdelay(5);
		qpnp_ibb_enable(true);
		mdelay(5);
	} else {
		qpnp_ibb_enable(false);
		mdelay(10);
		gpio_set_dir(vio_ldo_en_gpio.pin_id, 0);
		mdelay(5);
		gpio_set_dir(reset_gpio.pin_id, 0);
		regulator_disable(REG_LDO2 | REG_LDO6);
	}

	return NO_ERROR;
}

bool target_display_panel_node(char *panel_name, char *pbuf, uint16_t buf_size)
{
	return gcdb_display_cmdline_arg(panel_name, pbuf, buf_size);
}

void target_display_init(const char *panel_name)
{
	char cont_splash = '\0';

	set_panel_cmd_string(panel_name, &cont_splash);
	panel_name += strspn(panel_name, " ");

	if (!strcmp(panel_name, NO_PANEL_CONFIG)
		|| !strcmp(panel_name, SIM_VIDEO_PANEL)
		|| !strcmp(panel_name, SIM_CMD_PANEL)) {
		dprintf(INFO, "Selected panel: %s\nSkip panel configuration\n",
			panel_name);
		return;
	}

	dprintf(INFO, "%s: +\n", __func__);
	lge_panel_config_pre_init(&panel_name);
	if (gcdb_display_init(panel_name, MDP_REV_50, (void *)MIPI_FB_ADDR)) {
		target_force_cont_splash_disable(true);
		msm_display_off();
	}

	if (cont_splash == '0') {
		dprintf(INFO, "Forcing continuous splash disable\n");
		target_force_cont_splash_disable(true);
	}
	lge_panel_config_post_init(panel_name);
	dprintf(INFO, "%s: -\n", __func__);
}

void target_display_shutdown(void)
{
	gcdb_display_shutdown();
}

static uint32_t get_lcd_maker_id(uint32_t gpio_maker_id)
{
	gpio_tlmm_config(gpio_maker_id, 0, GPIO_INPUT, GPIO_NO_PULL, GPIO_2MA, 0);
	return gpio_status(gpio_maker_id);
}

int lge_panel_config_pre_init(const char **panel_name)
{
#if defined(LGE_WITH_PANEL_PRE_INIT)
	/* detect HW ID, board revision, LCD Maker ID here */
	uint32_t hw_id = board_hardware_id();

	/*
	 * In order to select panel_name, check hw_id, board revision and LCD maker ID.
	 * You can add source code situationally to select panel_name.
	 * Recommend to use 'rev' > 'lcd_maker_id' with lge_shared API on running time
	 */
	switch (hw_id) {
	case HW_PLATFORM_P1V_ATT_US:
		if (get_lcd_maker_id(86) == 0)
			*panel_name = "tovis_ili7807b_fhd_video";
		break;
	}
	return NO_ERROR;
#else
	/*LGE_WITH_PANEL_PRE_INIT is not defined */
	return NO_ERROR;
#endif
}

int lge_panel_config_post_init(const char *panel_name)
{
#if defined(LGE_WITH_PANEL_POST_INIT)
	return NO_ERROR;
#else
	/* LGE_WITH_PANEL_POST_INIT is not defined */
	return NO_ERROR;
#endif
}
