From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262078AbVG0J0c (ORCPT ); Wed, 27 Jul 2005 05:26:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262079AbVG0J0c (ORCPT ); Wed, 27 Jul 2005 05:26:32 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:61076 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S262078AbVG0J0a (ORCPT ); Wed, 27 Jul 2005 05:26:30 -0400 Date: Wed, 27 Jul 2005 11:26:13 +0200 From: Pavel Machek To: rpurdie@rpsys.net, lenz@cs.wisc.edu, kernel list , Andrew Morton Subject: [patch] Support powering sharp zaurus sl-5500 LCD up and down Message-ID: <20050727092613.GA4713@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This adds support for powering Zaurus's video up and down. PDA without screen is kind of useless, so it is quite important... I'll have to figure out how to really control the frontlight, because LCD without that is quite hard to read. diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -3,3 +3,4 @@ obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o +obj-$(CONFIG_SHARP_LOCOMO) += locomolcd.o diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c new file mode 100644 --- /dev/null +++ b/drivers/video/backlight/locomolcd.c @@ -0,0 +1,156 @@ +/* + * Backlight control code for Sharp Zaurus SL-5500 + * + * Copyright 2005 John Lenz + * GPL v2 + * + */ + +/* LCD power functions */ +#include +#include +#include +#include +#include +#include + +#include +#include + +#ifdef CONFIG_SA1100_COLLIE +#include +#else +#include +#endif + +extern void (*sa1100fb_lcd_power)(int on); + +static struct locomo_dev *locomolcd_dev = NULL; + +static void locomolcd_on(int comadj) +{ + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 1); + mdelay(2); + + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 1); + mdelay(2); + + locomo_m62332_senddata(locomolcd_dev, comadj, 0); + mdelay(5); + + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 1); + mdelay(10); + + /* TFTCRST | CPSOUT=0 | CPSEN */ + locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC); + + /* Set CPSD */ + locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD); + + /* TFTCRST | CPSOUT=0 | CPSEN */ + locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC); + mdelay(10); + + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 1); +} + +static void locomolcd_off(int comadj) +{ + /* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */ + locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC); + mdelay(1); + + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0); + mdelay(110); + + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0); + mdelay(700); + + /* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */ + locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0); +} + +void locomolcd_power(int on) +{ + int comadj = 118; + unsigned long flags; + + local_irq_save(flags); + + if (!locomolcd_dev) { + local_irq_restore(flags); + return; + } + + /* read comadj */ +#ifdef CONFIG_MACH_POODLE + comadj = 118; +#else + comadj = 128; +#endif + + if (on) + locomolcd_on(comadj); + else + locomolcd_off(comadj); + + local_irq_restore(flags); +} +EXPORT_SYMBOL(locomolcd_power); + +static int poodle_lcd_probe(struct locomo_dev *dev) +{ + unsigned long flags; + + local_irq_save(flags); + locomolcd_dev = dev; + + /* the poodle_lcd_power function is called for the first time + * from fs_initcall, which is before locomo is activated. + * We need to recall poodle_lcd_power here*/ +#ifdef CONFIG_MACH_POODLE + locomolcd_power(1); +#endif + local_irq_restore(flags); + return 0; +} + +static int poodle_lcd_remove(struct locomo_dev *dev) +{ + unsigned long flags; + local_irq_save(flags); + locomolcd_dev = NULL; + local_irq_restore(flags); + return 0; +} + +static struct locomo_driver poodle_lcd_driver = { + .drv = { + .name = "locomo-backlight", + }, + .devid = LOCOMO_DEVID_BACKLIGHT, + .probe = poodle_lcd_probe, + .remove = poodle_lcd_remove, +}; + +static int __init poodle_lcd_init(void) +{ + int ret; + + ret = locomo_driver_register(&poodle_lcd_driver); + if (ret) return ret; + +#ifdef CONFIG_SA1100_COLLIE + sa1100fb_lcd_power = locomolcd_power; +#endif + + return 0; +} +device_initcall(poodle_lcd_init); + -- teflon -- maybe it is a trademark, but it should not be.