Add lcm driver.

target/linux/xburst/files-2.6.31/arch/mips/jz4740/platform.c

@@ -16,8 +16,12 @@
 #include <linux/mtd/jz4740_nand.h>
 #include <linux/jz4740_fb.h>
 #include <linux/input/matrix_keypad.h>
+#include <linux/mtd/jz4740_nand.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_gpio.h>
 
 #include <asm/jzsoc.h>
+#include <asm/gpio.h>
 
 /* OHCI (USB full speed host controller) */
 static struct resource jz_usb_ohci_resources[] = {
@@ -366,20 +370,63 @@ static struct platform_device qi_lb60_fb = {
 	},
 };
 
+struct spi_gpio_platform_data spigpio_platform_data = {
+	.sck = 32 * 2 + 23,
+	.mosi = 32 * 2 + 22,
+	.miso = 32 * 2 + 22,
+	.num_chipselect = 1,
+};
+
+static struct platform_device spigpio_device = {
+	.name = "spi_gpio",
+	.id   = 1,
+	.dev = {
+		.platform_data = &spigpio_platform_data,
+	},
+};
+
+static struct spi_board_info qi_lb60_spi_board_info[] = {
+	{
+		.modalias = "gpm940b0",
+		.controller_data = (void*)(32 * 2 + 21),
+		.chip_select = 0,
+		.bus_num = 1,
+		.max_speed_hz = 30 * 1000,
+	},
+};
+
+static struct resource i2s_resources[] = {
+	[0] = {
+		.start          = CPHYSADDR(AIC_BASE),
+		.end            = CPHYSADDR(AIC_BASE) + 0x38 - 1,
+		.flags          = IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device jz_i2s_device = {
+	.name = "jz4740-i2s",
+	.id = -1,
+	.num_resources = ARRAY_SIZE(i2s_resources),
+	.resource = i2s_resources,
+};
+
 /* All */
 static struct platform_device *jz_platform_devices[] __initdata = {
 	&jz_usb_ohci_device,
-	&jz_lcd_device,
 	&jz_usb_gdt_device,
 	&jz_mmc_device,
 	&jz_nand_device,
 	&jz_i2c_device,
 	&qi_lb60_keypad,
 	&qi_lb60_fb,
+	&spigpio_device,
+	&jz_i2s_device,
 };
 
 static int __init jz_platform_init(void)
 {
+	spi_register_board_info(qi_lb60_spi_board_info,
+				ARRAY_SIZE(qi_lb60_spi_board_info));
 	return platform_add_devices(jz_platform_devices, ARRAY_SIZE(jz_platform_devices));
 }
 

target/linux/xburst/files-2.6.31/drivers/video/backlight/gpm940b0.c

@@ -0,0 +1,171 @@
+/*
+ *  Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *  	JZ4720/JZ4740 SoC LCD framebuffer driver
+ *
+ *  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.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/lcd.h>
+#include <linux/backlight.h>
+
+struct gpm940b0 {
+	struct spi_device *spi;
+	struct lcd_device *lcd;
+	struct backlight_device *bl;
+};
+
+static int gpm940b0_write_reg(struct spi_device *spi, uint8_t reg,
+				uint8_t data)
+{
+	uint8_t buf[2];
+	buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f);
+	buf[1] = data;
+
+	return spi_write(spi, buf, sizeof(buf));
+}
+
+static int gpm940b0_set_power(struct lcd_device *lcd, int power)
+{
+	struct gpm940b0 *gpm940b0 = lcd_get_data(lcd);
+
+	switch (power) {
+	case FB_BLANK_UNBLANK:
+	    gpm940b0_write_reg(gpm940b0->spi, 0x05, 0x5f);
+	    break;
+	default:
+	    gpm940b0_write_reg(gpm940b0->spi, 0x05, 0x5e);
+	    break;
+	}
+	return 0;
+}
+
+static int gpm940b0_set_contrast(struct lcd_device *lcd, int contrast)
+{
+	struct gpm940b0 *gpm940b0 = lcd_get_data(lcd);
+	gpm940b0_write_reg(gpm940b0->spi, 0x0d, contrast);
+	return 0;
+}
+
+static int gpm940b0_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
+{
+	if (mode->xres != 320 && mode->yres != 240)
+		return -EINVAL;
+
+	return 0;
+}
+
+int gpm940b0_bl_update_status(struct backlight_device *bl)
+{
+	struct gpm940b0 *gpm940b0 = bl_get_data(bl);
+
+    /* The datasheet suggest that this is not possible on the giantplus module 
+	gpm940b0_write_reg(gpm940b0->spi, 21, bl->props.brightness);*/
+
+	return 0;
+}
+
+static struct lcd_ops gpm940b0_lcd_ops = {
+    .set_power = gpm940b0_set_power,
+    .set_contrast = gpm940b0_set_contrast,
+    .set_mode = gpm940b0_set_mode,
+};
+
+static struct backlight_ops gpm940b0_bl_ops = {
+/*	.get_brightness	= gpm940b0_bl_get_brightness,*/
+	.update_status	= gpm940b0_bl_update_status,
+};
+
+static int __devinit gpm940b0_probe(struct spi_device *spi)
+{
+	int ret;
+	struct gpm940b0 *gpm940b0;
+
+	gpm940b0 = kmalloc(sizeof(*gpm940b0), GFP_KERNEL);
+
+	spi->bits_per_word = 8;
+
+	ret = spi_setup(spi);
+	if (ret) {
+		dev_err(&spi->dev, "Failed to setup spi\n");
+		goto err_free_gpm940b0;
+	}
+
+	gpm940b0->spi = spi;
+
+	gpm940b0->lcd = lcd_device_register("gpm940b0-lcd", &spi->dev, gpm940b0,
+						&gpm940b0_lcd_ops);
+
+	if (IS_ERR(gpm940b0->lcd)) {
+		ret = PTR_ERR(gpm940b0->lcd);
+		dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret);
+		goto err_free_gpm940b0;
+	}
+
+	gpm940b0->lcd->props.max_contrast = 255;
+
+	gpm940b0->bl = backlight_device_register("gpm940b0-bl", &spi->dev, gpm940b0,
+						&gpm940b0_bl_ops);
+
+	if (IS_ERR(gpm940b0->bl)) {
+		ret = PTR_ERR(gpm940b0->bl);
+		dev_err(&spi->dev, "Failed to register backlight device: %d\n", ret);
+		gpm940b0->bl = NULL;
+	} else {
+		gpm940b0->bl->props.max_brightness = 15;
+		gpm940b0->bl->props.brightness = 0;
+		gpm940b0->bl->props.power = FB_BLANK_UNBLANK;
+	}
+
+	return 0;
+err_free_gpm940b0:
+	return ret;
+}
+
+static int __devexit gpm940b0_remove(struct spi_device *spi)
+{
+	struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
+	if (gpm940b0->bl)
+		backlight_device_unregister(gpm940b0->bl);
+
+	lcd_device_unregister(gpm940b0->lcd);
+
+	spi_set_drvdata(spi, NULL);
+	kfree(gpm940b0);
+	return 0;
+}
+
+static struct spi_driver gpm940b0_driver = {
+	.driver = {
+		.name = "gpm940b0",
+		.owner = THIS_MODULE,
+	},
+	.probe = gpm940b0_probe,
+	.remove = __devexit_p(gpm940b0_remove),
+};
+
+static int __init gpm940b0_init(void)
+{
+	return spi_register_driver(&gpm940b0_driver);
+}
+module_init(gpm940b0_init);
+
+static void __exit gpm940b0_exit(void)
+{
+	return spi_unregister_driver(&gpm940b0_driver);
+}
+module_exit(gpm940b0_exit)
+
+MODULE_AUTHOR("Lars-Peter Clausen");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("LCD and backlight controll for Giantplus GPM940B0");
+MODULE_ALIAS("i2c:gpm940b0");

target/linux/xburst/patches-2.6.31/103-lcm.patch

@@ -0,0 +1,26 @@
+--- /opt/Projects/linux-2.6/drivers/video/backlight/Makefile	2009-09-02 16:48:24.000000000 +0200
++++ ./Makefile	2009-08-24 13:51:57.000000000 +0200
+@@ -9,6 +9,7 @@
+ obj-$(CONFIG_LCD_VGG2432A4)	   += vgg2432a4.o
+ obj-$(CONFIG_LCD_TDO24M)	   += tdo24m.o
+ obj-$(CONFIG_LCD_TOSA)		   += tosa_lcd.o
++obj-$(CONFIG_LCD_GPM940B0)	   += gpm940b0.o
+ 
+ obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
+ obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)    += atmel-pwm-bl.o
+--- /opt/Projects/linux-2.6/drivers/video/backlight/Kconfig	2009-09-02 16:48:24.000000000 +0200
++++ ./Kconfig	2009-08-24 13:49:46.000000000 +0200
+@@ -93,6 +93,13 @@
+ 	  If you have an HP Jornada 700 series handheld (710/720/728)
+ 	  say Y to enable LCD control driver.
+ 
++config LCD_GPM940B0
++	tristate "Giantplus GPM940B0 LCD and backlight driver"
++	depends on LCD_CLASS_DEVICE && BACKLIGHT_CLASS_DEVICE && SPI
++	default n
++	help
++      LCD and backlight driver for the Giantplus GPM940B0 LCD module.
++
+ #
+ # Backlight
+ #

target/linux/xburst/patches-2.6.31/400-spi-gpio-3wire.patch

@@ -0,0 +1,37 @@
+--- /opt/Projects/linux-2.6/drivers/spi/spi_gpio.c	2009-09-03 11:56:54.000000000 +0200
++++ ./spi_gpio.c	2009-08-24 17:00:21.000000000 +0200
+@@ -254,9 +254,11 @@
+ 	if (value)
+ 		goto done;
+ 
+-	value = spi_gpio_alloc(SPI_MISO_GPIO, label, true);
+-	if (value)
+-		goto free_mosi;
++	if (SPI_MISO_GPIO != SPI_MOSI_GPIO) {
++		value = spi_gpio_alloc(SPI_MISO_GPIO, label, true);
++		if (value)
++			goto free_mosi;
++	}
+ 
+ 	value = spi_gpio_alloc(SPI_SCK_GPIO, label, false);
+ 	if (value)
+@@ -319,7 +321,8 @@
+ 	if (status < 0) {
+ 		spi_master_put(spi_gpio->bitbang.master);
+ gpio_free:
+-		gpio_free(SPI_MISO_GPIO);
++		if (SPI_MISO_GPIO != SPI_MOSI_GPIO)
++			gpio_free(SPI_MISO_GPIO);
+ 		gpio_free(SPI_MOSI_GPIO);
+ 		gpio_free(SPI_SCK_GPIO);
+ 		spi_master_put(master);
+@@ -343,7 +346,8 @@
+ 
+ 	platform_set_drvdata(pdev, NULL);
+ 
+-	gpio_free(SPI_MISO_GPIO);
++	if (SPI_MISO_GPIO != SPI_MOSI_GPIO)
++		gpio_free(SPI_MISO_GPIO);
+ 	gpio_free(SPI_MOSI_GPIO);
+ 	gpio_free(SPI_SCK_GPIO);
+