MLK-13499 imx6sll: add epdc splash screen support

add splash screen feature for epdc.
it's tested on imx6sll arm2 board and evk board.

Signed-off-by: Robby Cai <robby.cai@nxp.com>
(cherry picked from commit c85c6f2a0f08dfc6c2859fe969b2021ab32b9370)
Signed-off-by: Ye Li <ye.li@nxp.com>

1 files changed, 226 insertions, 0 deletions

diff --git a/board/freescale/mx6sllevk/mx6sllevk.c b/board/freescale/mx6sllevk/mx6sllevk.c
index 26d5979..d42e0b5 100644
--- a/board/freescale/mx6sllevk/mx6sllevk.c
+++ b/board/freescale/mx6sllevk/mx6sllevk.c
@@ -21,6 +21,11 @@
 #include <power/pmic.h>
 #include <power/pfuze100_pmic.h>
 #include "../common/pfuze.h"
+
+#if defined(CONFIG_MXC_EPDC)
+#include <lcd.h>
+#include <mxc_epdc_fb.h>
+#endif
 #include <asm/imx-common/video.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -32,6 +37,9 @@ DECLARE_GLOBAL_DATA_PTR;
 #define LCD_PAD_CTRL    (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP | PAD_CTL_PUE | \
 	PAD_CTL_PKE | PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm)
 
+#define EPDC_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_SPEED_MED |	\
+	PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
+
 int dram_init(void)
 {
 	gd->ram_size = imx_ddr_size();
@@ -183,6 +191,219 @@ struct display_info_t const displays[] = {{
 size_t display_count = ARRAY_SIZE(displays);
 #endif
 
+#ifdef CONFIG_MXC_EPDC
+static iomux_v3_cfg_t const epdc_enable_pads[] = {
+	MX6_PAD_EPDC_DATA00__EPDC_DATA00	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA01__EPDC_DATA01	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA02__EPDC_DATA02	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA03__EPDC_DATA03	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA04__EPDC_DATA04	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA05__EPDC_DATA05	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA06__EPDC_DATA06	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA07__EPDC_DATA07	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA08__EPDC_DATA08	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA09__EPDC_DATA09	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA10__EPDC_DATA10	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA11__EPDC_DATA11	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA12__EPDC_DATA12	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA13__EPDC_DATA13	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA14__EPDC_DATA14	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_DATA15__EPDC_DATA15	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_SDCLK__EPDC_SDCLK_P	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_SDLE__EPDC_SDLE		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_SDOE__EPDC_SDOE		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_SDSHR__EPDC_SDSHR		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_SDCE0__EPDC_SDCE0		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_GDCLK__EPDC_GDCLK		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_GDOE__EPDC_GDOE		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_GDRL__EPDC_GDRL		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EPDC_GDSP__EPDC_GDSP		| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const epdc_disable_pads[] = {
+	MX6_PAD_EPDC_DATA01__GPIO1_IO08,
+	MX6_PAD_EPDC_DATA02__GPIO1_IO09,
+	MX6_PAD_EPDC_DATA03__GPIO1_IO10,
+	MX6_PAD_EPDC_DATA04__GPIO1_IO11,
+	MX6_PAD_EPDC_DATA05__GPIO1_IO12,
+	MX6_PAD_EPDC_DATA06__GPIO1_IO13,
+	MX6_PAD_EPDC_DATA07__GPIO1_IO14,
+	MX6_PAD_EPDC_DATA08__GPIO1_IO15,
+	MX6_PAD_EPDC_DATA09__GPIO1_IO16,
+	MX6_PAD_EPDC_DATA10__GPIO1_IO17,
+	MX6_PAD_EPDC_DATA11__GPIO1_IO18,
+	MX6_PAD_EPDC_DATA12__GPIO1_IO19,
+	MX6_PAD_EPDC_DATA13__GPIO1_IO20,
+	MX6_PAD_EPDC_DATA14__GPIO1_IO21,
+	MX6_PAD_EPDC_DATA15__GPIO1_IO22,
+	MX6_PAD_EPDC_SDCLK__GPIO1_IO23,
+	MX6_PAD_EPDC_SDLE__GPIO1_IO24,
+	MX6_PAD_EPDC_SDOE__GPIO1_IO25,
+	MX6_PAD_EPDC_SDSHR__GPIO1_IO26,
+	MX6_PAD_EPDC_SDCE0__GPIO1_IO27,
+	MX6_PAD_EPDC_GDCLK__GPIO1_IO31,
+	MX6_PAD_EPDC_GDOE__GPIO2_IO00,
+	MX6_PAD_EPDC_GDRL__GPIO2_IO01,
+	MX6_PAD_EPDC_GDSP__GPIO2_IO02,
+};
+
+vidinfo_t panel_info = {
+	.vl_refresh = 85,
+	.vl_col = 1024,
+	.vl_row = 758,
+	.vl_pixclock = 40000000,
+	.vl_left_margin = 12,
+	.vl_right_margin = 76,
+	.vl_upper_margin = 4,
+	.vl_lower_margin = 5,
+	.vl_hsync = 12,
+	.vl_vsync = 2,
+	.vl_sync = 0,
+	.vl_mode = 0,
+	.vl_flag = 0,
+	.vl_bpix = 3,
+	.cmap = 0,
+};
+
+struct epdc_timing_params panel_timings = {
+	.vscan_holdoff = 4,
+	.sdoed_width = 10,
+	.sdoed_delay = 20,
+	.sdoez_width = 10,
+	.sdoez_delay = 20,
+	.gdclk_hp_offs = 524,
+	.gdsp_offs = 327,
+	.gdoe_offs = 0,
+	.gdclk_offs = 19,
+	.num_ce = 1,
+};
+
+static void setup_epdc_power(void)
+{
+	/* Setup epdc voltage */
+
+	/* EPDC_PWRSTAT - GPIO2[13] for PWR_GOOD status */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_PWR_STAT__GPIO2_IO13 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+	gpio_request(IMX_GPIO_NR(2, 13), "epdc_pwrstat");
+	gpio_direction_input(IMX_GPIO_NR(2, 13));
+
+	/* EPDC_VCOM0 - GPIO2[03] for VCOM control */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_VCOM0__GPIO2_IO03 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* Set as output */
+	gpio_request(IMX_GPIO_NR(2, 3), "epdc_vcom0");
+	gpio_direction_output(IMX_GPIO_NR(2, 3), 1);
+
+	/* EPDC_PWRWAKEUP - GPIO2[14] for EPD PMIC WAKEUP */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_PWR_WAKE__GPIO2_IO14 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+	/* Set as output */
+	gpio_request(IMX_GPIO_NR(2, 14), "epdc_pwr_wake");
+	gpio_direction_output(IMX_GPIO_NR(2, 14), 1);
+
+	/* EPDC_PWRCTRL0 - GPIO2[07] for EPD PWR CTL0 */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_PWR_CTRL0__GPIO2_IO07 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+	/* Set as output */
+	gpio_request(IMX_GPIO_NR(2, 7), "epdc_pwr_ctrl0");
+	gpio_direction_output(IMX_GPIO_NR(2, 7), 1);
+}
+
+static void epdc_enable_pins(void)
+{
+	/* epdc iomux settings */
+	imx_iomux_v3_setup_multiple_pads(epdc_enable_pads,
+				ARRAY_SIZE(epdc_enable_pads));
+}
+
+static void epdc_disable_pins(void)
+{
+	/* Configure MUX settings for EPDC pins to GPIO  and drive to 0 */
+	imx_iomux_v3_setup_multiple_pads(epdc_disable_pads,
+				ARRAY_SIZE(epdc_disable_pads));
+}
+
+static void setup_epdc(void)
+{
+	/*** epdc Maxim PMIC settings ***/
+
+	/* EPDC_PWRSTAT - GPIO2[13] for PWR_GOOD status */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_PWR_STAT__GPIO2_IO13 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* EPDC_VCOM0 - GPIO2[03] for VCOM control */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_VCOM0__GPIO2_IO03 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* EPDC_PWRWAKEUP - GPIO2[14] for EPD PMIC WAKEUP */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_PWR_WAKE__GPIO2_IO14 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* EPDC_PWRCTRL0 - GPIO2[07] for EPD PWR CTL0 */
+	imx_iomux_v3_setup_pad(MX6_PAD_EPDC_PWR_CTRL0__GPIO2_IO07 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* Set pixel clock rates for EPDC in clock.c */
+
+	panel_info.epdc_data.wv_modes.mode_init = 0;
+	panel_info.epdc_data.wv_modes.mode_du = 1;
+	panel_info.epdc_data.wv_modes.mode_gc4 = 3;
+	panel_info.epdc_data.wv_modes.mode_gc8 = 2;
+	panel_info.epdc_data.wv_modes.mode_gc16 = 2;
+	panel_info.epdc_data.wv_modes.mode_gc32 = 2;
+
+	panel_info.epdc_data.epdc_timings = panel_timings;
+
+	setup_epdc_power();
+}
+
+void epdc_power_on(void)
+{
+	unsigned int reg;
+	struct gpio_regs *gpio_regs = (struct gpio_regs *)GPIO2_BASE_ADDR;
+
+	/* Set EPD_PWR_CTL0 to high - enable EINK_VDD (3.15) */
+	gpio_set_value(IMX_GPIO_NR(2, 7), 1);
+	udelay(1000);
+
+	/* Enable epdc signal pin */
+	epdc_enable_pins();
+
+	/* Set PMIC Wakeup to high - enable Display power */
+	gpio_set_value(IMX_GPIO_NR(2, 14), 1);
+
+	/* Wait for PWRGOOD == 1 */
+	while (1) {
+		reg = readl(&gpio_regs->gpio_psr);
+		if (!(reg & (1 << 13)))
+			break;
+
+		udelay(100);
+	}
+
+	/* Enable VCOM */
+	gpio_set_value(IMX_GPIO_NR(2, 3), 1);
+
+	udelay(500);
+}
+
+void epdc_power_off(void)
+{
+	/* Set PMIC Wakeup to low - disable Display power */
+	gpio_set_value(IMX_GPIO_NR(2, 14), 0);
+
+	/* Disable VCOM */
+	gpio_set_value(IMX_GPIO_NR(2, 3), 0);
+
+	epdc_disable_pins();
+
+	/* Set EPD_PWR_CTL0 to low - disable EINK_VDD (3.15) */
+	gpio_set_value(IMX_GPIO_NR(2, 7), 0);
+}
+#endif
+
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
@@ -195,6 +416,11 @@ int board_init(void)
 	/* Address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 
+#ifdef	CONFIG_MXC_EPDC
+	enable_epdc_clock();
+	setup_epdc();
+#endif
+
 	return 0;
 }