Patchwork [U-Boot,2/4] wandboard: add Future Eletronics 7" WVGA LCD extension board

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Submitter Otavio Salvador
Date Oct. 21, 2013, 11:34 p.m.
Message ID <1382398500-9649-3-git-send-email-otavio@ossystems.com.br>
Download mbox | patch
Permalink /patch/285300/
State Changes Requested
Delegated to: Stefano Babic
Headers show

Comments

Otavio Salvador - Oct. 21, 2013, 11:34 p.m.
This adds support for the 7" WVGA produced by Future Eletronics and
make it dynamically detect if it is connected or not based on the
touchscreen controller.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
---
 board/wandboard/wandboard.c | 238 ++++++++++++++++++++++++++++++++++++++++----
 include/configs/wandboard.h |  35 ++++++-
 2 files changed, 251 insertions(+), 22 deletions(-)
Tapani Utriainen - Oct. 22, 2013, 10:20 a.m.
On Mon, 21 Oct 2013 21:34:58 -0200
Otavio Salvador <otavio@ossystems.com.br> wrote:

> This adds support for the 7" WVGA produced by Future Eletronics and
> make it dynamically detect if it is connected or not based on the
> touchscreen controller.
> 
> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

Nice!

Tested-by: Tapani Utriainen <tapani@technexion.com>

Patch

diff --git a/board/wandboard/wandboard.c b/board/wandboard/wandboard.c
index 23a78c1..b2a27c0 100644
--- a/board/wandboard/wandboard.c
+++ b/board/wandboard/wandboard.c
@@ -15,6 +15,7 @@ 
 #include <asm/arch/sys_proto.h>
 #include <asm/gpio.h>
 #include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/mxc_i2c.h>
 #include <asm/imx-common/boot_mode.h>
 #include <asm/io.h>
 #include <asm/sizes.h>
@@ -25,6 +26,7 @@ 
 #include <miiphy.h>
 #include <netdev.h>
 #include <linux/fb.h>
+#include <i2c.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -39,6 +41,10 @@  DECLARE_GLOBAL_DATA_PTR;
 #define ENET_PAD_CTRL  (PAD_CTL_PUS_100K_UP |			\
 	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
 
+#define I2C_PAD_CTRL	(PAD_CTL_PUS_100K_UP |			\
+	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS |	\
+	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
+
 #define USDHC1_CD_GPIO		IMX_GPIO_NR(1, 2)
 #define USDHC3_CD_GPIO		IMX_GPIO_NR(3, 9)
 #define ETH_PHY_RESET		IMX_GPIO_NR(3, 29)
@@ -208,48 +214,236 @@  int board_phy_config(struct phy_device *phydev)
 }
 
 #if defined(CONFIG_VIDEO_IPUV3)
-static struct fb_videomode const hdmi = {
-	.name           = "HDMI",
-	.refresh        = 60,
-	.xres           = 1024,
-	.yres           = 768,
-	.pixclock       = 15385,
-	.left_margin    = 220,
-	.right_margin   = 40,
-	.upper_margin   = 21,
-	.lower_margin   = 7,
-	.hsync_len      = 60,
-	.vsync_len      = 10,
-	.sync           = FB_SYNC_EXT,
-	.vmode          = FB_VMODE_NONINTERLACED
+struct i2c_pads_info i2c_pad_info = {
+	.scl = {
+		.i2c_mode = MX6_PAD_KEY_COL3__I2C2_SCL
+			| MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gpio_mode = MX6_PAD_KEY_COL3__GPIO_4_12
+			| MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gp = IMX_GPIO_NR(4, 12)
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_KEY_ROW3__I2C2_SDA
+			| MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gpio_mode = MX6_PAD_KEY_ROW3__GPIO_4_13
+			| MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gp = IMX_GPIO_NR(4, 13)
+	}
 };
 
-int board_video_skip(void)
-{
-	int ret;
+static iomux_v3_cfg_t const fwadapt_7wvga_pads[] = {
+	MX6_PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK,
+	MX6_PAD_DI0_PIN2__IPU1_DI0_PIN2, /* HSync */
+	MX6_PAD_DI0_PIN3__IPU1_DI0_PIN3, /* VSync */
+	MX6_PAD_DI0_PIN4__IPU1_DI0_PIN4
+		| MUX_PAD_CTRL(PAD_CTL_DSE_120ohm), /* Contrast */
+	MX6_PAD_DI0_PIN15__IPU1_DI0_PIN15, /* DISP0_DRDY */
+
+	MX6_PAD_DISP0_DAT0__IPU1_DISP0_DAT_0,
+	MX6_PAD_DISP0_DAT1__IPU1_DISP0_DAT_1,
+	MX6_PAD_DISP0_DAT2__IPU1_DISP0_DAT_2,
+	MX6_PAD_DISP0_DAT3__IPU1_DISP0_DAT_3,
+	MX6_PAD_DISP0_DAT4__IPU1_DISP0_DAT_4,
+	MX6_PAD_DISP0_DAT5__IPU1_DISP0_DAT_5,
+	MX6_PAD_DISP0_DAT6__IPU1_DISP0_DAT_6,
+	MX6_PAD_DISP0_DAT7__IPU1_DISP0_DAT_7,
+	MX6_PAD_DISP0_DAT8__IPU1_DISP0_DAT_8,
+	MX6_PAD_DISP0_DAT9__IPU1_DISP0_DAT_9,
+	MX6_PAD_DISP0_DAT10__IPU1_DISP0_DAT_10,
+	MX6_PAD_DISP0_DAT11__IPU1_DISP0_DAT_11,
+	MX6_PAD_DISP0_DAT12__IPU1_DISP0_DAT_12,
+	MX6_PAD_DISP0_DAT13__IPU1_DISP0_DAT_13,
+	MX6_PAD_DISP0_DAT14__IPU1_DISP0_DAT_14,
+	MX6_PAD_DISP0_DAT15__IPU1_DISP0_DAT_15,
+	MX6_PAD_DISP0_DAT16__IPU1_DISP0_DAT_16,
+	MX6_PAD_DISP0_DAT17__IPU1_DISP0_DAT_17,
+
+	MX6_PAD_SD4_DAT2__GPIO_2_10
+		| MUX_PAD_CTRL(NO_PAD_CTRL), /* DISP0_BKLEN */
+	MX6_PAD_SD4_DAT3__GPIO_2_11
+		| MUX_PAD_CTRL(NO_PAD_CTRL), /* DISP0_VDDEN */
+};
 
-	ret = ipuv3_fb_init(&hdmi, 0, IPU_PIX_FMT_RGB24);
+struct display_info_t {
+	int	bus;
+	int	addr;
+	int	pixfmt;
+	int	(*detect)(struct display_info_t const *dev);
+	void	(*enable)(struct display_info_t const *dev);
+	struct	fb_videomode mode;
+};
 
-	if (ret)
-		printf("HDMI cannot be configured: %d\n", ret);
+static int detect_hdmi(struct display_info_t const *dev)
+{
+	struct hdmi_regs *hdmi	= (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
+	return readb(&hdmi->phy_stat0) & HDMI_DVI_STAT;
+}
 
+static void do_enable_hdmi(struct display_info_t const *dev)
+{
 	imx_enable_hdmi_phy();
+}
 
-	return ret;
+static int detect_i2c(struct display_info_t const *dev)
+{
+	return ((0 == i2c_set_bus_num(dev->bus)) &&
+			(0 == i2c_probe(dev->addr)));
+}
+
+static void enable_fwadapt_7wvga(struct display_info_t const *dev)
+{
+	imx_iomux_v3_setup_multiple_pads(
+		fwadapt_7wvga_pads,
+		ARRAY_SIZE(fwadapt_7wvga_pads));
+
+	gpio_direction_output(IMX_GPIO_NR(2, 10), 1);
+	gpio_direction_output(IMX_GPIO_NR(2, 11), 1);
+}
+
+static struct display_info_t const displays[] = {{
+	.bus	= -1,
+	.addr	= 0,
+	.pixfmt	= IPU_PIX_FMT_RGB24,
+	.detect	= detect_hdmi,
+	.enable	= do_enable_hdmi,
+	.mode	= {
+		.name           = "HDMI",
+		.refresh        = 60,
+		.xres           = 1024,
+		.yres           = 768,
+		.pixclock       = 15385,
+		.left_margin    = 220,
+		.right_margin   = 40,
+		.upper_margin   = 21,
+		.lower_margin   = 7,
+		.hsync_len      = 60,
+		.vsync_len      = 10,
+		.sync           = FB_SYNC_EXT,
+		.vmode          = FB_VMODE_NONINTERLACED
+} }, {
+	.bus	= 0,
+	.addr	= 0x10,
+	.pixfmt	= IPU_PIX_FMT_RGB666,
+	.detect	= detect_i2c,
+	.enable	= enable_fwadapt_7wvga,
+	.mode	= {
+		.name           = "FWBADAPT-LCD-F07A-0102",
+		.refresh        = 60,
+		.xres           = 800,
+		.yres           = 480,
+		.pixclock       = 33260,
+		.left_margin    = 128,
+		.right_margin   = 128,
+		.upper_margin   = 22,
+		.lower_margin   = 22,
+		.hsync_len      = 1,
+		.vsync_len      = 1,
+		.sync           = 0,
+		.vmode          = FB_VMODE_NONINTERLACED
+} } };
+
+int board_video_skip(void)
+{
+	int i;
+	int ret;
+	int detected = 0;
+	char const *panel = getenv("panel");
+	if (!panel) {
+		for (i = 0; i < ARRAY_SIZE(displays); i++) {
+			struct display_info_t const *dev = displays+i;
+			if (dev->detect && dev->detect(dev)) {
+				panel = dev->mode.name;
+				detected = 1;
+				break;
+			}
+		}
+		if (!panel) {
+			panel = displays[0].mode.name;
+			printf("No panel detected: default to %s\n", panel);
+			i = 0;
+		}
+	} else {
+		for (i = 0; i < ARRAY_SIZE(displays); i++) {
+			if (!strcmp(panel, displays[i].mode.name))
+				break;
+		}
+	}
+	if (i < ARRAY_SIZE(displays)) {
+		ret = ipuv3_fb_init(&displays[i].mode, 0,
+				    displays[i].pixfmt);
+
+		if (!ret) {
+			displays[i].enable(displays+i);
+			printf("Display: %s (%ux%u) %s\n",
+			       displays[i].mode.name,
+			       displays[i].mode.xres,
+			       displays[i].mode.yres,
+			       (detected ? "[auto]" : ""));
+		} else
+			printf("LCD %s cannot be configured: %d\n",
+			       displays[i].mode.name, ret);
+	} else {
+		printf("unsupported panel %s\n", panel);
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
 static void setup_display(void)
 {
 	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
 	int reg;
 
 	enable_ipu_clock();
 	imx_setup_hdmi();
 
+	/* Turn on LDB0, LDB1, IPU,IPU DI0 clocks */
+	reg = __raw_readl(&mxc_ccm->CCGR3);
+	reg |=  MXC_CCM_CCGR3_LDB_DI0_MASK | MXC_CCM_CCGR3_LDB_DI1_MASK;
+	writel(reg, &mxc_ccm->CCGR3);
+
+	/* set LDB0, LDB1 clk select to 011/011 */
+	reg = readl(&mxc_ccm->cs2cdr);
+	reg &= ~(MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK
+		 | MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK);
+	reg |= (3 << MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_OFFSET)
+	      | (3 << MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_OFFSET);
+	writel(reg, &mxc_ccm->cs2cdr);
+
+	reg = readl(&mxc_ccm->cscmr2);
+	reg |= MXC_CCM_CSCMR2_LDB_DI0_IPU_DIV | MXC_CCM_CSCMR2_LDB_DI1_IPU_DIV;
+	writel(reg, &mxc_ccm->cscmr2);
+
 	reg = readl(&mxc_ccm->chsccdr);
 	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
 		<< MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET);
+	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
+		<< MXC_CCM_CHSCCDR_IPU1_DI1_CLK_SEL_OFFSET);
 	writel(reg, &mxc_ccm->chsccdr);
+
+	reg = IOMUXC_GPR2_BGREF_RRMODE_EXTERNAL_RES
+	     | IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_LOW
+	     | IOMUXC_GPR2_DI0_VS_POLARITY_ACTIVE_LOW
+	     | IOMUXC_GPR2_BIT_MAPPING_CH1_SPWG
+	     | IOMUXC_GPR2_DATA_WIDTH_CH1_18BIT
+	     | IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG
+	     | IOMUXC_GPR2_DATA_WIDTH_CH0_18BIT
+	     | IOMUXC_GPR2_LVDS_CH0_MODE_DISABLED
+	     | IOMUXC_GPR2_LVDS_CH1_MODE_ENABLED_DI0;
+	writel(reg, &iomux->gpr[2]);
+
+	reg = readl(&iomux->gpr[3]);
+	reg = (reg & ~(IOMUXC_GPR3_LVDS1_MUX_CTL_MASK
+			| IOMUXC_GPR3_HDMI_MUX_CTL_MASK))
+	    | (IOMUXC_GPR3_MUX_SRC_IPU1_DI0
+	       << IOMUXC_GPR3_LVDS1_MUX_CTL_OFFSET);
+	writel(reg, &iomux->gpr[3]);
+
+	/* Disable LCD backlight */
+	imx_iomux_v3_setup_pad(MX6_PAD_DI0_PIN4__GPIO_4_20);
+	gpio_direction_input(IMX_GPIO_NR(4, 20));
 }
 #endif /* CONFIG_VIDEO_IPUV3 */
 
@@ -307,6 +501,8 @@  int board_init(void)
 	/* address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info);
+
 	return 0;
 }
 
diff --git a/include/configs/wandboard.h b/include/configs/wandboard.h
index 442a984..dff515e 100644
--- a/include/configs/wandboard.h
+++ b/include/configs/wandboard.h
@@ -55,6 +55,12 @@ 
 #define CONFIG_LOADADDR			0x12000000
 #define CONFIG_SYS_TEXT_BASE		0x17800000
 
+/* I2C Configs */
+#define CONFIG_CMD_I2C
+#define CONFIG_I2C_MULTI_BUS
+#define CONFIG_I2C_MXC
+#define CONFIG_SYS_I2C_SPEED		100000
+
 /* MMC Configuration */
 #define CONFIG_FSL_ESDHC
 #define CONFIG_FSL_USDHC
@@ -97,6 +103,7 @@ 
 #define CONFIG_VIDEO_LOGO
 #define CONFIG_VIDEO_BMP_LOGO
 #define CONFIG_IPUV3_CLK 260000000
+#define CONFIG_CMD_HDMIDETECT
 #define CONFIG_IMX_HDMI
 
 #if defined(CONFIG_MX6DL) || defined(CONFIG_MX6S)
@@ -134,7 +141,33 @@ 
 			"fi; "	\
 		"fi\0" \
 	"mmcargs=setenv bootargs console=${console},${baudrate} " \
-		"root=${mmcroot}\0" \
+		"root=${mmcroot}; run videoargs\0" \
+	"videoargs=" \
+		"setenv nextcon 0; " \
+		"if hdmidet; then " \
+			"setenv bootargs ${bootargs} " \
+				"video=mxcfb${nextcon}:dev=hdmi,1280x720M@60," \
+					"if=RGB24; " \
+			"setenv fbmen fbmem=28M; " \
+			"setexpr nextcon ${nextcon} + 1; " \
+		"else " \
+			"echo - no HDMI monitor;" \
+		"fi; " \
+		"i2c dev 0; " \
+		"if i2c probe 0x10; then " \
+			"setenv bootargs ${bootargs} " \
+				"video=mxcfb${nextcon}:dev=lcd,800x480@60," \
+					"if=RGB666; " \
+			"if test 0 -eq ${nextcon}; then " \
+				"setenv fbmem fbmem=10M; " \
+			"else " \
+				"setenv fbmem ${fbmem},10M; " \
+			"fi; " \
+			"setexpr nextcon ${nextcon} + 1; " \
+		"else " \
+			"echo '- no FWBADAPT-7WVGA-LCD-F07A-0102 display';" \
+		"fi; " \
+		"setenv bootargs ${bootargs} ${fbmem}\0" \
 	"loadbootscript=" \
 		"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
 	"bootscript=echo Running bootscript from mmc ...; " \