[U-Boot] [PATCH V3 9/9] nhk8815: added lcd support
Alessandro Rubini
rubini-list at gnudd.com
Sat Dec 5 13:40:43 CET 2009
From: Alessandro Rubini <rubini at unipv.it>
This adds lcd support for the board. It includes defines for 32-bit
parameter as well, although support for LCD_COLOR32 is not yet in
u-boot. This uses the stmpe2401 to turn on display backlight.
Signed-off-by: Alessandro Rubini <rubini at unipv.it>
Acked-by: Andrea Gallo <andrea.gallo at stericsson.com>
---
board/st/nhk8815/Makefile | 1 +
board/st/nhk8815/lcd.c | 88 ++++++++++++++++++++++++++++++++++++
board/st/nhk8815/nhk8815-devices.h | 1 +
board/st/nhk8815/nhk8815.c | 3 +
include/configs/nhk8815.h | 10 ++++
5 files changed, 103 insertions(+), 0 deletions(-)
create mode 100644 board/st/nhk8815/lcd.c
diff --git a/board/st/nhk8815/Makefile b/board/st/nhk8815/Makefile
index 1bb1d2c..7155f12 100644
--- a/board/st/nhk8815/Makefile
+++ b/board/st/nhk8815/Makefile
@@ -31,6 +31,7 @@ LIB = $(obj)lib$(BOARD).a
COBJS-y := nhk8815.o
COBJS-$(CONFIG_NHK8815_KEYPAD) += keypad.o
+COBJS-$(CONFIG_LCD) += lcd.o
COBJS := $(COBJS-y)
SOBJS := platform.o
diff --git a/board/st/nhk8815/lcd.c b/board/st/nhk8815/lcd.c
new file mode 100644
index 0000000..d3acb48
--- /dev/null
+++ b/board/st/nhk8815/lcd.c
@@ -0,0 +1,88 @@
+/*
+ * board/st/nhk8815/lcd.c: use amba clcd and STMPE2401 for backlight/reset
+ *
+ * Copyright 2009 Alessandro Rubini <rubini at unipv.it>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <lcd.h>
+#include <amba_clcd.h>
+#include <stmpe2401.h>
+
+/* Two configurations are supported: 32bpp and 16bpp */
+#if LCD_BPP == LCD_COLOR32
+# define CLCD_CNTL_VAL 0x0019182b
+# define CLCD_BPIX_VAL 5 /* 1<<5 = 32 */
+#elif LCD_BPP == LCD_COLOR16
+# define CLCD_CNTL_VAL 0x001d1829
+# define CLCD_BPIX_VAL 4 /* 1<<4 = 16 */
+#else
+# error "Invalid LCD_BPP in config file"
+#endif
+
+/* Horribly, these are precomputed registers */
+struct clcd_config nhk8815_clcd_config = {
+ .address = (struct clcd_registers *)NOMADIK_CLCDC_BASE,
+ .tim0 = 0xd52600c4, /* horizontal timings */
+ .tim1 = 0x220a01df, /* vertical timings */
+ .tim2 = 0x031f1821, /* clock and signal polarity */
+ .tim3 = 0, /* not used */
+ .cntl = CLCD_CNTL_VAL, /* control, pixel size etc */
+ .pixclock = 18*1000*1000, /* 18 MHz */
+};
+
+/* This is the panel_info for generic boards. Too little info, actually */
+vidinfo_t panel_info = {
+ .vl_col = 800,
+ .vl_row = 480,
+ .vl_bpix = CLCD_BPIX_VAL,
+ .priv = &nhk8815_clcd_config,
+};
+
+/* Don't turn on (too early), but configure data lines and remove reset */
+void lcd_enable(void)
+{
+ int i;
+
+ /* Turn the alternate functions as needed */
+ for (i = 32; i <= 39; i++)
+ nmk_gpio_af(i, GPIO_ALT_B);
+
+ /* EXP1_GPIO_5 = output high -- remove reset from display */
+ pe_gpio_af(STMPE1, 5, PE_GPIO_AF_GPIO);
+ pe_gpio_dir(STMPE1, 5, 1);
+ pe_gpio_set(STMPE1, 5, 1);
+}
+
+/* Called from late_init: we turn on the backlight through port expander */
+int nhk8815_backlight_on(void)
+{
+ int i;
+
+ /* Turn the alternate functions as needed */
+ for (i = 32; i <= 39; i++)
+ nmk_gpio_af(i, GPIO_ALT_B);
+
+ /* EXP0_GPIO_21 = output high -- backlight */
+ pe_gpio_af(STMPE0, 21, PE_GPIO_AF_GPIO);
+ pe_gpio_dir(STMPE0, 21, 1);
+ pe_gpio_set(STMPE0, 21, 1);
+ return 0;
+}
diff --git a/board/st/nhk8815/nhk8815-devices.h b/board/st/nhk8815/nhk8815-devices.h
index 78252ed..aec5825 100644
--- a/board/st/nhk8815/nhk8815-devices.h
+++ b/board/st/nhk8815/nhk8815-devices.h
@@ -3,5 +3,6 @@
/* Prototypes for functions exported by device files in this directory */
extern int nhk8815_keypad_init(void); /* ./keypad.c */
+extern int nhk8815_backlight_on(void); /* in ./lcd.c */
#endif /* __NHK8815_DEVICES__ */
diff --git a/board/st/nhk8815/nhk8815.c b/board/st/nhk8815/nhk8815.c
index fbabd15..fedb3c0 100644
--- a/board/st/nhk8815/nhk8815.c
+++ b/board/st/nhk8815/nhk8815.c
@@ -113,6 +113,9 @@ int board_late_init(void)
#ifdef CONFIG_NHK8815_KEYPAD
nhk8815_keypad_init();
#endif
+#ifdef CONFIG_LCD
+ nhk8815_backlight_on();
+#endif
return 0;
}
diff --git a/include/configs/nhk8815.h b/include/configs/nhk8815.h
index f9dbd7a..ad098d9 100644
--- a/include/configs/nhk8815.h
+++ b/include/configs/nhk8815.h
@@ -134,6 +134,16 @@
/* Keypad using stmpe2401 */
#define CONFIG_NHK8815_KEYPAD
+/* Display support */
+#define CONFIG_LCD
+#define CONFIG_LCD_LOGO
+#define CONFIG_LCD_INFO_BELOW_LOGO
+#define CONFIG_SYS_WHITE_ON_BLACK
+#define LCD_BPP LCD_COLOR16
+#define CONFIG_VIDEO_AMBA
+#define CONFIG_SYS_CONSOLE_IS_IN_ENV 1
+#define CONFIG_CONSOLE_MUX
+
/* Ethernet */
#define PCI_MEMORY_VADDR 0xe8000000
#define PCI_IO_VADDR 0xee000000
--
1.6.0.2
More information about the U-Boot
mailing list