mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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28ea12b3b3
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23421 3c298f89-4303-0410-b956-a3cf2f4a3e73
295 lines
7.1 KiB
Diff
295 lines
7.1 KiB
Diff
From cb0cdd5f614d723139331ecf56d28e529ff9b74c Mon Sep 17 00:00:00 2001
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From: Lars-Peter Clausen <lars@metafoo.de>
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Date: Sun, 1 Aug 2010 21:19:40 +0200
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Subject: [PATCH] Add ili8960 lcd driver
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---
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drivers/video/backlight/Kconfig | 7 +
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drivers/video/backlight/Makefile | 1 +
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drivers/video/backlight/ili8960.c | 253 +++++++++++++++++++++++++++++++++++++
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3 files changed, 261 insertions(+), 0 deletions(-)
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create mode 100644 drivers/video/backlight/ili8960.c
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--- a/drivers/video/backlight/Kconfig
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+++ b/drivers/video/backlight/Kconfig
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@@ -59,6 +59,13 @@ config LCD_LTV350QV
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The LTV350QV panel is present on all ATSTK1000 boards.
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+config LCD_ILI8960
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+ tristate "Ilitek ili8960 LCD driver"
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+ depends on LCD_CLASS_DEVICE && SPI
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+ default n
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+ help
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+ Driver for the Ilitek ili8960 LCD controller chip.
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+
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config LCD_ILI9320
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tristate
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help
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--- a/drivers/video/backlight/Makefile
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+++ b/drivers/video/backlight/Makefile
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@@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_HP700) += jornada72
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obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o
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obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o
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obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
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+obj-$(CONFIG_LCD_ILI8960) += ili8960.o
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obj-$(CONFIG_LCD_ILI9320) += ili9320.o
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obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
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obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o
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--- /dev/null
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+++ b/drivers/video/backlight/ili8960.c
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@@ -0,0 +1,253 @@
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+/*
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+ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
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+ * Driver for Ilitek ili8960 LCD
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ *
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+ * You should have received a copy of the GNU General Public License along
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+ * with this program; if not, write to the Free Software Foundation, Inc.,
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+ * 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/spi/spi.h>
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+#include <linux/lcd.h>
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+#include <linux/backlight.h>
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+#include <linux/delay.h>
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+
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+struct ili8960 {
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+ struct spi_device *spi;
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+ struct lcd_device *lcd;
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+ struct backlight_device *bl;
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+ bool enabled;
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+ int brightness;
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+};
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+
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+static int ili8960_write_reg(struct spi_device *spi, uint8_t reg,
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+ uint8_t data)
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+{
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+ uint8_t buf[2];
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+ buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f);
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+ buf[1] = data;
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+
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+ return spi_write(spi, buf, sizeof(buf));
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+}
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+
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+static int ili8960_programm_power(struct spi_device *spi, bool enabled)
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+{
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+ int ret;
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+
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+ if (enabled)
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+ mdelay(20);
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+
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+ ret = ili8960_write_reg(spi, 0x5, enabled ? 0xc7 : 0xc6);
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+
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+ if (!enabled)
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+ mdelay(20);
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+
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+ return ret;
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+}
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+
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+static int ili8960_set_power(struct lcd_device *lcd, int power)
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+{
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+ struct ili8960 *ili8960 = lcd_get_data(lcd);
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+
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+ switch (power) {
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+ case FB_BLANK_UNBLANK:
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+ ili8960->enabled = true;
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+ break;
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+ default:
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+ ili8960->enabled = false;
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+ break;
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+ }
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+
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+ return ili8960_programm_power(ili8960->spi, ili8960->enabled);
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+}
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+
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+static int ili8960_get_power(struct lcd_device *lcd)
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+{
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+ struct ili8960 *ili8960 = lcd_get_data(lcd);
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+ return ili8960->enabled ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
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+}
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+
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+static int ili8960_set_contrast(struct lcd_device *lcd, int contrast)
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+{
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+ struct ili8960 *ili8960 = lcd_get_data(lcd);
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+ ili8960_write_reg(ili8960->spi, 0x0d, contrast);
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+
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+ return 0;
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+}
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+
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+static int ili8960_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
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+{
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+ if (mode->xres != 320 && mode->yres != 240)
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+ return -EINVAL;
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+
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+ return 0;
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+}
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+
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+static int ili8960_set_brightness(struct ili8960 *ili8960, int brightness)
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+{
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+ int ret;
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+ ret = ili8960_write_reg(ili8960->spi, 0x3, brightness);
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+
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+ if (ret == 0)
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+ ili8960->brightness = brightness;
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+
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+ return ret;
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+}
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+
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+static ssize_t ili8960_show_brightness(struct device *dev,
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+ struct device_attribute *attr, char *buf)
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+{
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+ struct lcd_device *ld = to_lcd_device(dev);
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+ struct ili8960 *ili8960 = lcd_get_data(ld);
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+
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+ return sprintf(buf, "%d\n", ili8960->brightness);
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+}
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+
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+static ssize_t ili8960_store_brightness(struct device *dev,
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+ struct device_attribute *attr, const char *buf, size_t count)
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+{
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+ char *endp;
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+ struct lcd_device *ld = to_lcd_device(dev);
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+ struct ili8960 *ili8960 = lcd_get_data(ld);
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+ int brightness = simple_strtoul(buf, &endp, 0);
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+
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+ if (brightness > 255 || brightness < 0)
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+ return -EINVAL;
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+
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+ ili8960_set_brightness(ili8960, brightness);
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+
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+ return count;
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+}
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+
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+
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+static DEVICE_ATTR(brightness, 0644, ili8960_show_brightness,
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+ ili8960_store_brightness);
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+
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+static struct lcd_ops ili8960_lcd_ops = {
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+ .set_power = ili8960_set_power,
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+ .get_power = ili8960_get_power,
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+ .set_contrast = ili8960_set_contrast,
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+ .set_mode = ili8960_set_mode,
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+};
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+
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+static int __devinit ili8960_probe(struct spi_device *spi)
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+{
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+ int ret;
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+ struct ili8960 *ili8960;
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+
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+ ili8960 = kmalloc(sizeof(*ili8960), GFP_KERNEL);
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+
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+ spi->bits_per_word = 8;
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+ spi->mode = SPI_MODE_3;
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+
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+ ret = spi_setup(spi);
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+ if (ret) {
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+ dev_err(&spi->dev, "Failed to setup spi\n");
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+ goto err_free_ili8960;
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+ }
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+
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+ ili8960->spi = spi;
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+
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+ ili8960->lcd = lcd_device_register("ili8960-lcd", &spi->dev, ili8960,
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+ &ili8960_lcd_ops);
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+
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+ if (IS_ERR(ili8960->lcd)) {
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+ ret = PTR_ERR(ili8960->lcd);
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+ dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret);
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+ goto err_free_ili8960;
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+ }
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+
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+ ili8960->lcd->props.max_contrast = 255;
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+
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+ ret = device_create_file(&ili8960->lcd->dev, &dev_attr_brightness);
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+ if (ret)
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+ goto err_unregister_lcd;
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+
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+ ili8960_programm_power(ili8960->spi, true);
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+ ili8960->enabled = true;
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+ dev_set_drvdata(&spi->dev, ili8960);
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+
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+ ili8960_write_reg(spi, 0x13, 0x01);
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+ ili8960_write_reg(spi, 0x5, 0xc7);
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+
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+ return 0;
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+err_unregister_lcd:
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+ lcd_device_unregister(ili8960->lcd);
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+err_free_ili8960:
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+ kfree(ili8960);
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+ return ret;
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+}
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+
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+static int __devexit ili8960_remove(struct spi_device *spi)
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+{
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+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
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+
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+ device_remove_file(&ili8960->lcd->dev, &dev_attr_brightness);
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+ lcd_device_unregister(ili8960->lcd);
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+
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+ spi_set_drvdata(spi, NULL);
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+ kfree(ili8960);
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+ return 0;
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+}
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+
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+#ifdef CONFIG_PM
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+
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+static int ili8960_suspend(struct spi_device *spi, pm_message_t state)
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+{
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+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
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+
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+ if (ili8960->enabled)
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+ ili8960_programm_power(ili8960->spi, false);
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+
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+ return 0;
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+}
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+
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+static int ili8960_resume(struct spi_device *spi)
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+{
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+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
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+
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+ if (ili8960->enabled)
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+ ili8960_programm_power(ili8960->spi, true);
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+
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+ return 0;
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+}
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+
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+#else
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+#define ili8960_suspend NULL
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+#define ili8960_resume NULL
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+#endif
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+
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+static struct spi_driver ili8960_driver = {
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+ .driver = {
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+ .name = "ili8960",
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+ .owner = THIS_MODULE,
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+ },
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+ .probe = ili8960_probe,
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+ .remove = __devexit_p(ili8960_remove),
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+ .suspend = ili8960_suspend,
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+ .resume = ili8960_resume,
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+};
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+
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+static int __init ili8960_init(void)
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+{
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+ return spi_register_driver(&ili8960_driver);
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+}
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+module_init(ili8960_init);
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+
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+static void __exit ili8960_exit(void)
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+{
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+ spi_unregister_driver(&ili8960_driver);
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+}
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+module_exit(ili8960_exit)
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+
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+MODULE_AUTHOR("Lars-Peter Clausen");
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+MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("LCD driver for Ilitek ili8960");
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+MODULE_ALIAS("spi:ili8960");
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