mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-16 23:32:48 +02:00
8f313bd0fd
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31902 3c298f89-4303-0410-b956-a3cf2f4a3e73
305 lines
7.3 KiB
Diff
305 lines
7.3 KiB
Diff
From 2248fb9c47fe7e72c735d6c16aba27bf92e1673a Mon Sep 17 00:00:00 2001
|
|
From: Lars-Peter Clausen <lars@metafoo.de>
|
|
Date: Sun, 1 Aug 2010 21:19:40 +0200
|
|
Subject: [PATCH 07/21] Add ili8960 lcd driver
|
|
|
|
---
|
|
drivers/video/backlight/Kconfig | 7 +
|
|
drivers/video/backlight/Makefile | 1 +
|
|
drivers/video/backlight/ili8960.c | 263 +++++++++++++++++++++++++++++++++++++
|
|
3 files changed, 271 insertions(+), 0 deletions(-)
|
|
create mode 100644 drivers/video/backlight/ili8960.c
|
|
|
|
--- a/drivers/video/backlight/Kconfig
|
|
+++ b/drivers/video/backlight/Kconfig
|
|
@@ -59,6 +59,13 @@ config LCD_LTV350QV
|
|
|
|
The LTV350QV panel is present on all ATSTK1000 boards.
|
|
|
|
+config LCD_ILI8960
|
|
+ tristate "Ilitek ili8960 LCD driver"
|
|
+ depends on LCD_CLASS_DEVICE && SPI
|
|
+ default n
|
|
+ help
|
|
+ Driver for the Ilitek ili8960 LCD controller chip.
|
|
+
|
|
config LCD_ILI9320
|
|
tristate
|
|
help
|
|
--- a/drivers/video/backlight/Makefile
|
|
+++ b/drivers/video/backlight/Makefile
|
|
@@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_HP700) += jornada72
|
|
obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o
|
|
obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o
|
|
obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
|
|
+obj-$(CONFIG_LCD_ILI8960) += ili8960.o
|
|
obj-$(CONFIG_LCD_ILI9320) += ili9320.o
|
|
obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
|
|
obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o
|
|
--- /dev/null
|
|
+++ b/drivers/video/backlight/ili8960.c
|
|
@@ -0,0 +1,263 @@
|
|
+/*
|
|
+ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
|
|
+ * Driver for Ilitek ili8960 LCD
|
|
+ *
|
|
+ * 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>
|
|
+#include <linux/delay.h>
|
|
+
|
|
+struct ili8960 {
|
|
+ struct spi_device *spi;
|
|
+ struct lcd_device *lcd;
|
|
+ struct backlight_device *bl;
|
|
+ bool enabled;
|
|
+ unsigned int brightness;
|
|
+};
|
|
+
|
|
+#define ILI8960_REG_BRIGHTNESS 0x03
|
|
+#define ILI8960_REG_POWER 0x05
|
|
+#define ILI8960_REG_CONTRAST 0x0d
|
|
+
|
|
+static int ili8960_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 ili8960_programm_power(struct spi_device *spi, bool enabled)
|
|
+{
|
|
+ int ret;
|
|
+
|
|
+ if (enabled)
|
|
+ mdelay(20);
|
|
+
|
|
+ ret = ili8960_write_reg(spi, ILI8960_REG_POWER, enabled ? 0xc7 : 0xc6);
|
|
+
|
|
+ if (!enabled)
|
|
+ mdelay(20);
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int ili8960_set_power(struct lcd_device *lcd, int power)
|
|
+{
|
|
+ struct ili8960 *ili8960 = lcd_get_data(lcd);
|
|
+
|
|
+ switch (power) {
|
|
+ case FB_BLANK_UNBLANK:
|
|
+ ili8960->enabled = true;
|
|
+ break;
|
|
+ default:
|
|
+ ili8960->enabled = false;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ return ili8960_programm_power(ili8960->spi, ili8960->enabled);
|
|
+}
|
|
+
|
|
+static int ili8960_get_power(struct lcd_device *lcd)
|
|
+{
|
|
+ struct ili8960 *ili8960 = lcd_get_data(lcd);
|
|
+ return ili8960->enabled ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
|
|
+}
|
|
+
|
|
+static int ili8960_set_contrast(struct lcd_device *lcd, int contrast)
|
|
+{
|
|
+ struct ili8960 *ili8960 = lcd_get_data(lcd);
|
|
+
|
|
+ return ili8960_write_reg(ili8960->spi, ILI8960_REG_CONTRAST, contrast);
|
|
+}
|
|
+
|
|
+static int ili8960_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
|
|
+{
|
|
+ if (mode->xres != 320 && mode->yres != 240)
|
|
+ return -EINVAL;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ili8960_set_brightness(struct ili8960 *ili8960, int brightness)
|
|
+{
|
|
+ int ret;
|
|
+
|
|
+ ret = ili8960_write_reg(ili8960->spi, ILI8960_REG_BRIGHTNESS, brightness);
|
|
+
|
|
+ if (ret == 0)
|
|
+ ili8960->brightness = brightness;
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static ssize_t ili8960_show_brightness(struct device *dev,
|
|
+ struct device_attribute *attr, char *buf)
|
|
+{
|
|
+ struct lcd_device *ld = to_lcd_device(dev);
|
|
+ struct ili8960 *ili8960 = lcd_get_data(ld);
|
|
+
|
|
+ return sprintf(buf, "%u\n", ili8960->brightness);
|
|
+}
|
|
+
|
|
+static ssize_t ili8960_store_brightness(struct device *dev,
|
|
+ struct device_attribute *attr, const char *buf, size_t count)
|
|
+{
|
|
+ struct lcd_device *ld = to_lcd_device(dev);
|
|
+ struct ili8960 *ili8960 = lcd_get_data(ld);
|
|
+ unsigned long brightness;
|
|
+ int ret;
|
|
+
|
|
+ ret = strict_strtoul(buf, 0, &brightness);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
+ if (brightness > 255)
|
|
+ return -EINVAL;
|
|
+
|
|
+ ili8960_set_brightness(ili8960, brightness);
|
|
+
|
|
+ return count;
|
|
+}
|
|
+
|
|
+
|
|
+static DEVICE_ATTR(brightness, 0644, ili8960_show_brightness,
|
|
+ ili8960_store_brightness);
|
|
+
|
|
+static struct lcd_ops ili8960_lcd_ops = {
|
|
+ .set_power = ili8960_set_power,
|
|
+ .get_power = ili8960_get_power,
|
|
+ .set_contrast = ili8960_set_contrast,
|
|
+ .set_mode = ili8960_set_mode,
|
|
+};
|
|
+
|
|
+static int __devinit ili8960_probe(struct spi_device *spi)
|
|
+{
|
|
+ int ret;
|
|
+ struct ili8960 *ili8960;
|
|
+
|
|
+ ili8960 = kmalloc(sizeof(*ili8960), GFP_KERNEL);
|
|
+ if (!ili8960)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ spi->bits_per_word = 8;
|
|
+ spi->mode = SPI_MODE_3;
|
|
+
|
|
+ ret = spi_setup(spi);
|
|
+ if (ret) {
|
|
+ dev_err(&spi->dev, "Failed to setup spi\n");
|
|
+ goto err_free_ili8960;
|
|
+ }
|
|
+
|
|
+ ili8960->spi = spi;
|
|
+
|
|
+ ili8960->lcd = lcd_device_register("ili8960-lcd", &spi->dev, ili8960,
|
|
+ &ili8960_lcd_ops);
|
|
+
|
|
+ if (IS_ERR(ili8960->lcd)) {
|
|
+ ret = PTR_ERR(ili8960->lcd);
|
|
+ dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret);
|
|
+ goto err_free_ili8960;
|
|
+ }
|
|
+
|
|
+ ili8960->lcd->props.max_contrast = 255;
|
|
+
|
|
+ ret = device_create_file(&ili8960->lcd->dev, &dev_attr_brightness);
|
|
+ if (ret)
|
|
+ goto err_unregister_lcd;
|
|
+
|
|
+ ili8960_programm_power(ili8960->spi, true);
|
|
+ ili8960->enabled = true;
|
|
+
|
|
+ spi_set_drvdata(spi, ili8960);
|
|
+
|
|
+ ili8960_write_reg(spi, 0x13, 0x01);
|
|
+
|
|
+ return 0;
|
|
+err_unregister_lcd:
|
|
+ lcd_device_unregister(ili8960->lcd);
|
|
+err_free_ili8960:
|
|
+ kfree(ili8960);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int __devexit ili8960_remove(struct spi_device *spi)
|
|
+{
|
|
+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
|
|
+
|
|
+ device_remove_file(&ili8960->lcd->dev, &dev_attr_brightness);
|
|
+ lcd_device_unregister(ili8960->lcd);
|
|
+
|
|
+ spi_set_drvdata(spi, NULL);
|
|
+ kfree(ili8960);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_PM
|
|
+
|
|
+static int ili8960_suspend(struct spi_device *spi, pm_message_t state)
|
|
+{
|
|
+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
|
|
+
|
|
+ if (ili8960->enabled)
|
|
+ ili8960_programm_power(ili8960->spi, false);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ili8960_resume(struct spi_device *spi)
|
|
+{
|
|
+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
|
|
+
|
|
+ if (ili8960->enabled)
|
|
+ ili8960_programm_power(ili8960->spi, true);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#else
|
|
+#define ili8960_suspend NULL
|
|
+#define ili8960_resume NULL
|
|
+#endif
|
|
+
|
|
+static struct spi_driver ili8960_driver = {
|
|
+ .driver = {
|
|
+ .name = "ili8960",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+ .probe = ili8960_probe,
|
|
+ .remove = __devexit_p(ili8960_remove),
|
|
+ .suspend = ili8960_suspend,
|
|
+ .resume = ili8960_resume,
|
|
+};
|
|
+
|
|
+static int __init ili8960_init(void)
|
|
+{
|
|
+ return spi_register_driver(&ili8960_driver);
|
|
+}
|
|
+module_init(ili8960_init);
|
|
+
|
|
+static void __exit ili8960_exit(void)
|
|
+{
|
|
+ spi_unregister_driver(&ili8960_driver);
|
|
+}
|
|
+module_exit(ili8960_exit)
|
|
+
|
|
+MODULE_AUTHOR("Lars-Peter Clausen");
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_DESCRIPTION("LCD driver for Ilitek ili8960");
|
|
+MODULE_ALIAS("spi:ili8960");
|