MLK-12425-4: mx6dlsabresd: support epdc

Support epdc for mx6dlsabresd board.
Introduce a new configuration file mx6dlsabresd_epdc_defconfig.
Add related settings.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 245 insertions, 0 deletions

diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index 732ac8f..af273f2 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -30,6 +30,10 @@
 #include "../common/pfuze.h"
 #include <asm/arch/mx6-ddr.h>
 #include <usb.h>
+#if defined(CONFIG_MX6DL) && defined(CONFIG_MXC_EPDC)
+#include <lcd.h>
+#include <mxc_epdc_fb.h>
+#endif
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -51,6 +55,9 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS |	\
 	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
 
+#define EPDC_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_SPEED_MED |	\
+	PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
+
 #define I2C_PMIC	1
 
 #define I2C_PAD MUX_PAD_CTRL(I2C_PAD_CTRL)
@@ -225,6 +232,54 @@ static void setup_iomux_uart(void)
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
 }
 
+#if defined(CONFIG_MX6DL) && defined(CONFIG_MXC_EPDC)
+static iomux_v3_cfg_t const epdc_enable_pads[] = {
+	MX6_PAD_EIM_A16__EPDC_DATA00	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA10__EPDC_DATA01	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA12__EPDC_DATA02	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA11__EPDC_DATA03	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_LBA__EPDC_DATA04	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_EB2__EPDC_DATA05	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_CS0__EPDC_DATA06	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_RW__EPDC_DATA07	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_A21__EPDC_GDCLK	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_A22__EPDC_GDSP	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_A23__EPDC_GDOE	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_A24__EPDC_GDRL	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_D31__EPDC_SDCLK_P	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_D27__EPDC_SDOE	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA1__EPDC_SDLE	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_EB1__EPDC_SDSHR	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA2__EPDC_BDR0	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA4__EPDC_SDCE0	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA5__EPDC_SDCE1	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+	MX6_PAD_EIM_DA6__EPDC_SDCE2	| MUX_PAD_CTRL(EPDC_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const epdc_disable_pads[] = {
+	MX6_PAD_EIM_A16__GPIO2_IO22,
+	MX6_PAD_EIM_DA10__GPIO3_IO10,
+	MX6_PAD_EIM_DA12__GPIO3_IO12,
+	MX6_PAD_EIM_DA11__GPIO3_IO11,
+	MX6_PAD_EIM_LBA__GPIO2_IO27,
+	MX6_PAD_EIM_EB2__GPIO2_IO30,
+	MX6_PAD_EIM_CS0__GPIO2_IO23,
+	MX6_PAD_EIM_RW__GPIO2_IO26,
+	MX6_PAD_EIM_A21__GPIO2_IO17,
+	MX6_PAD_EIM_A22__GPIO2_IO16,
+	MX6_PAD_EIM_A23__GPIO6_IO06,
+	MX6_PAD_EIM_A24__GPIO5_IO04,
+	MX6_PAD_EIM_D31__GPIO3_IO31,
+	MX6_PAD_EIM_D27__GPIO3_IO27,
+	MX6_PAD_EIM_DA1__GPIO3_IO01,
+	MX6_PAD_EIM_EB1__GPIO2_IO29,
+	MX6_PAD_EIM_DA2__GPIO3_IO02,
+	MX6_PAD_EIM_DA4__GPIO3_IO04,
+	MX6_PAD_EIM_DA5__GPIO3_IO05,
+	MX6_PAD_EIM_DA6__GPIO3_IO06,
+};
+#endif
+
 #ifdef CONFIG_FSL_ESDHC
 struct fsl_esdhc_cfg usdhc_cfg[3] = {
 	{USDHC2_BASE_ADDR},
@@ -346,6 +401,192 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
+#if defined(CONFIG_MX6DL) && defined(CONFIG_MXC_EPDC)
+vidinfo_t panel_info = {
+	.vl_refresh = 85,
+	.vl_col = 800,
+	.vl_row = 600,
+	.vl_pixclock = 26666667,
+	.vl_left_margin = 8,
+	.vl_right_margin = 100,
+	.vl_upper_margin = 4,
+	.vl_lower_margin = 8,
+	.vl_hsync = 4,
+	.vl_vsync = 1,
+	.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 = 419,
+	.gdsp_offs = 20,
+	.gdoe_offs = 0,
+	.gdclk_offs = 5,
+	.num_ce = 1,
+};
+
+static void setup_epdc_power(void)
+{
+	/* Setup epdc voltage */
+
+	/* EIM_A17 - GPIO2[21] for PWR_GOOD status */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_A17__GPIO2_IO21 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+	/* Set as input */
+	gpio_direction_input(IMX_GPIO_NR(2, 21));
+
+	/* EIM_D17 - GPIO3[17] for VCOM control */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_D17__GPIO3_IO17 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* Set as output */
+	gpio_direction_output(IMX_GPIO_NR(3, 17), 1);
+
+	/* EIM_D20 - GPIO3[20] for EPD PMIC WAKEUP */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_D20__GPIO3_IO20 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+	/* Set as output */
+	gpio_direction_output(IMX_GPIO_NR(3, 20), 1);
+
+	/* EIM_A18 - GPIO2[20] for EPD PWR CTL0 */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_A18__GPIO2_IO20 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+	/* Set as output */
+	gpio_direction_output(IMX_GPIO_NR(2, 20), 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 */
+	imx_iomux_v3_setup_multiple_pads(epdc_disable_pads,
+				ARRAY_SIZE(epdc_disable_pads));
+}
+
+static void setup_epdc(void)
+{
+	unsigned int reg;
+	struct mxc_ccm_reg *ccm_regs = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	/*** epdc Maxim PMIC settings ***/
+
+	/* EPDC PWRSTAT - GPIO2[21] for PWR_GOOD status */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_A17__GPIO2_IO21 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* EPDC VCOM0 - GPIO3[17] for VCOM control */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_D17__GPIO3_IO17 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* UART4 TXD - GPIO3[20] for EPD PMIC WAKEUP */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_D20__GPIO3_IO20 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/* EIM_A18 - GPIO2[20] for EPD PWR CTL0 */
+	imx_iomux_v3_setup_pad(MX6_PAD_EIM_A18__GPIO2_IO20 |
+				MUX_PAD_CTRL(EPDC_PAD_CTRL));
+
+	/*** Set pixel clock rates for EPDC ***/
+
+	/* EPDC AXI clk (IPU2_CLK) from PFD_400M, set to 396/2 = 198MHz */
+	reg = readl(&ccm_regs->cscdr3);
+	reg &= ~0x7C000;
+	reg |= (1 << 16) | (1 << 14);
+	writel(reg, &ccm_regs->cscdr3);
+
+	/* EPDC AXI clk enable */
+	reg = readl(&ccm_regs->CCGR3);
+	reg |= 0x00C0;
+	writel(reg, &ccm_regs->CCGR3);
+
+	/* EPDC PIX clk (IPU2_DI1_CLK) from PLL5, set to 650/4/6 = ~27MHz */
+	reg = readl(&ccm_regs->cscdr2);
+	reg &= ~0x3FE00;
+	reg |= (2 << 15) | (5 << 12);
+	writel(reg, &ccm_regs->cscdr2);
+
+	/* PLL5 enable (defaults to 650) */
+	reg = readl(&ccm_regs->analog_pll_video);
+	reg &= ~((1 << 16) | (1 << 12));
+	reg |= (1 << 13);
+	writel(reg, &ccm_regs->analog_pll_video);
+
+	/* EPDC PIX clk enable */
+	reg = readl(&ccm_regs->CCGR3);
+	reg |= 0x0C00;
+	writel(reg, &ccm_regs->CCGR3);
+
+	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, 20), 1);
+	udelay(1000);
+
+	/* Enable epdc signal pin */
+	epdc_enable_pins();
+
+	/* Set PMIC Wakeup to high - enable Display power */
+	gpio_set_value(IMX_GPIO_NR(3, 20), 1);
+
+	/* Wait for PWRGOOD == 1 */
+	while (1) {
+		reg = readl(&gpio_regs->gpio_psr);
+		if (!(reg & (1 << 21)))
+			break;
+
+		udelay(100);
+	}
+
+	/* Enable VCOM */
+	gpio_set_value(IMX_GPIO_NR(3, 17), 1);
+
+	udelay(500);
+}
+
+void epdc_power_off(void)
+{
+	/* Set PMIC Wakeup to low - disable Display power */
+	gpio_set_value(IMX_GPIO_NR(3, 20), 0);
+
+	/* Disable VCOM */
+	gpio_set_value(IMX_GPIO_NR(3, 17), 0);
+
+	epdc_disable_pins();
+
+	/* Set EPD_PWR_CTL0 to low - disable EINK_VDD (3.15) */
+	gpio_set_value(IMX_GPIO_NR(2, 20), 0);
+}
+#endif
+
 #if defined(CONFIG_VIDEO_IPUV3)
 static void disable_lvds(struct display_info_t const *dev)
 {
@@ -598,6 +839,10 @@ int board_init(void)
 	setup_usb();
 #endif
 
+#if defined(CONFIG_MX6DL) && defined(CONFIG_MXC_EPDC)
+	setup_epdc();
+#endif
+
 	return 0;
 }