X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fsvn-archive%2Farchive.git;a=blobdiff_plain;f=target%2Flinux%2Fs3c24xx%2Ffiles-2.6.30%2Fdrivers%2Finput%2Ftouchscreen%2Fs3c2410_ts.c;fp=target%2Flinux%2Fs3c24xx%2Ffiles-2.6.30%2Fdrivers%2Finput%2Ftouchscreen%2Fs3c2410_ts.c;h=0000000000000000000000000000000000000000;hp=93163ff509f6f57121495bc2ea376992279ae5e2;hb=4b42541b43cf471a9f6c254da90f358d6ee0a4b1;hpb=1b474249f3eb643a4a3d734e2c2f5052600ed2e1 diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/s3c2410_ts.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/s3c2410_ts.c deleted file mode 100644 index 93163ff509..0000000000 --- a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/s3c2410_ts.c +++ /dev/null @@ -1,593 +0,0 @@ -/* - * 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 - * - * Copyright (c) 2004 Arnaud Patard - * iPAQ H1940 touchscreen support - * - * ChangeLog - * - * 2004-09-05: Herbert Pötzl - * - added clock (de-)allocation code - * - * 2005-03-06: Arnaud Patard - * - h1940_ -> s3c2410 (this driver is now also used on the n30 - * machines :P) - * - Debug messages are now enabled with the config option - * TOUCHSCREEN_S3C2410_DEBUG - * - Changed the way the value are read - * - Input subsystem should now work - * - Use ioremap and readl/writel - * - * 2005-03-23: Arnaud Patard - * - Make use of some undocumented features of the touchscreen - * controller - * - * 2007-05-23: Harald Welte - * - Add proper support for S32440 - * - * 2008-06-23: Andy Green - * - removed averaging system - * - added generic Touchscreen filter stuff - * - * 2008-11-27: Nelson Castillo - * - improve interrupt handling - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#include - -/* For ts.dev.id.version */ -#define S3C2410TSVERSION 0x0101 - -#define TSC_SLEEP (S3C2410_ADCTSC_PULL_UP_DISABLE | S3C2410_ADCTSC_XY_PST(0)) - -#define WAIT4INT(x) (((x)<<8) | \ - S3C2410_ADCTSC_YM_SEN | \ - S3C2410_ADCTSC_YP_SEN | \ - S3C2410_ADCTSC_XP_SEN | \ - S3C2410_ADCTSC_XY_PST(3)) - -#define AUTOPST (S3C2410_ADCTSC_YM_SEN | \ - S3C2410_ADCTSC_YP_SEN | \ - S3C2410_ADCTSC_XP_SEN | \ - S3C2410_ADCTSC_AUTO_PST | \ - S3C2410_ADCTSC_XY_PST(0)) - -#define DEBUG_LVL KERN_DEBUG - -MODULE_AUTHOR("Arnaud Patard "); -MODULE_DESCRIPTION("s3c2410 touchscreen driver"); -MODULE_LICENSE("GPL"); - -/* - * Definitions & global arrays. - */ - -static char *s3c2410ts_name = "s3c2410 TouchScreen"; - -#define TS_RELEASE_TIMEOUT (HZ >> 7 ? HZ >> 7 : 1) /* 8ms (5ms if HZ is 200) */ -#define TS_EVENT_FIFO_SIZE (2 << 6) /* must be a power of 2 */ - -#define TS_STATE_STANDBY 0 /* initial state */ -#define TS_STATE_PRESSED 1 -#define TS_STATE_RELEASE_PENDING 2 -#define TS_STATE_RELEASE 3 - -/* - * Per-touchscreen data. - */ - -struct s3c2410ts { - struct input_dev *dev; - struct ts_filter_chain *chain; - int is_down; - int state; - struct kfifo *event_fifo; -}; - -static struct s3c2410ts ts; - -static void __iomem *base_addr; - -/* - * A few low level functions. - */ - -static inline void s3c2410_ts_connect(void) -{ - s3c2410_gpio_cfgpin(S3C2410_GPG12, S3C2410_GPG12_XMON); - s3c2410_gpio_cfgpin(S3C2410_GPG13, S3C2410_GPG13_nXPON); - s3c2410_gpio_cfgpin(S3C2410_GPG14, S3C2410_GPG14_YMON); - s3c2410_gpio_cfgpin(S3C2410_GPG15, S3C2410_GPG15_nYPON); -} - -static void s3c2410_ts_start_adc_conversion(void) -{ - writel(S3C2410_ADCTSC_PULL_UP_DISABLE | AUTOPST, - base_addr + S3C2410_ADCTSC); - writel(readl(base_addr + S3C2410_ADCCON) | S3C2410_ADCCON_ENABLE_START, - base_addr + S3C2410_ADCCON); -} - -/* - * Just send the input events. - */ - -enum ts_input_event {IE_DOWN = 0, IE_UP}; - -static void ts_input_report(int event, int coords[]) -{ -#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG - static char *s[] = {"down", "up"}; - struct timeval tv; - - do_gettimeofday(&tv); -#endif - - if (event == IE_DOWN) { - input_report_abs(ts.dev, ABS_X, coords[0]); - input_report_abs(ts.dev, ABS_Y, coords[1]); - input_report_key(ts.dev, BTN_TOUCH, 1); - input_report_abs(ts.dev, ABS_PRESSURE, 1); - -#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG - printk(DEBUG_LVL "T:%06d %6s (X:%03d, Y:%03d)\n", - (int)tv.tv_usec, s[event], coords[0], coords[1]); -#endif - } else { - input_report_key(ts.dev, BTN_TOUCH, 0); - input_report_abs(ts.dev, ABS_PRESSURE, 0); - -#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG - printk(DEBUG_LVL "T:%06d %6s\n", - (int)tv.tv_usec, s[event]); -#endif - } - - input_sync(ts.dev); -} - -/* - * Manage the state of the touchscreen. - */ - -static void event_send_timer_f(unsigned long data); - -static struct timer_list event_send_timer = - TIMER_INITIALIZER(event_send_timer_f, 0, 0); - -static void event_send_timer_f(unsigned long data) -{ - static int noop_counter; - int event_type; - - while (__kfifo_get(ts.event_fifo, (unsigned char *)&event_type, - sizeof(int))) { - int buf[2]; - - switch (event_type) { - case 'D': - if (ts.state == TS_STATE_RELEASE_PENDING) - /* Ignore short UP event */ - ts.state = TS_STATE_PRESSED; - break; - - case 'U': - ts.state = TS_STATE_RELEASE_PENDING; - break; - - case 'P': - if (ts.is_down) /* stylus_action needs a conversion */ - s3c2410_ts_start_adc_conversion(); - - if (unlikely(__kfifo_get(ts.event_fifo, - (unsigned char *)buf, - sizeof(int) * 2) - != sizeof(int) * 2)) - goto ts_exit_error; - - ts_input_report(IE_DOWN, buf); - ts.state = TS_STATE_PRESSED; - break; - - default: - goto ts_exit_error; - } - - noop_counter = 0; - } - - if (noop_counter++ >= 1) { - noop_counter = 0; - if (ts.state == TS_STATE_RELEASE_PENDING) { - /* - * We delay the UP event for a while to avoid jitter. - * If we get a DOWN event we do not send it. - */ - ts_input_report(IE_UP, NULL); - ts.state = TS_STATE_STANDBY; - - ts_filter_chain_clear(ts.chain); - } - } else { - mod_timer(&event_send_timer, jiffies + TS_RELEASE_TIMEOUT); - } - - return; - -ts_exit_error: /* should not happen unless we have a bug */ - printk(KERN_ERR __FILE__ ": event_send_timer_f failed\n"); -} - -/* - * Manage interrupts. - */ - -static irqreturn_t stylus_updown(int irq, void *dev_id) -{ - unsigned long data0; - unsigned long data1; - int event_type; - - data0 = readl(base_addr+S3C2410_ADCDAT0); - data1 = readl(base_addr+S3C2410_ADCDAT1); - - ts.is_down = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) && - (!(data1 & S3C2410_ADCDAT0_UPDOWN)); - - event_type = ts.is_down ? 'D' : 'U'; - - if (unlikely(__kfifo_put(ts.event_fifo, (unsigned char *)&event_type, - sizeof(int)) != sizeof(int))) /* should not happen */ - printk(KERN_ERR __FILE__": stylus_updown lost event!\n"); - - if (ts.is_down) - s3c2410_ts_start_adc_conversion(); - else - writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC); - - mod_timer(&event_send_timer, jiffies + 1); - - return IRQ_HANDLED; -} - -static irqreturn_t stylus_action(int irq, void *dev_id) -{ - int buf[3]; - - /* Grab the ADC results. */ - buf[1] = readl(base_addr + S3C2410_ADCDAT0) & - S3C2410_ADCDAT0_XPDATA_MASK; - buf[2] = readl(base_addr + S3C2410_ADCDAT1) & - S3C2410_ADCDAT1_YPDATA_MASK; - - switch (ts_filter_chain_feed(ts.chain, &buf[1])) { - case 0: - /* The filter wants more points. */ - s3c2410_ts_start_adc_conversion(); - return IRQ_HANDLED; - case 1: - /* We have a point from the filters or no filtering enabled. */ - buf[0] = 'P'; - break; - default: - printk(KERN_ERR __FILE__ - ":%d Invalid ts_filter_chain_feed return value.\n", - __LINE__); - case -1: - /* Error. Ignore the event. */ - ts_filter_chain_clear(ts.chain); - writel(WAIT4INT(1), base_addr + S3C2410_ADCTSC); - return IRQ_HANDLED; - }; - - if (unlikely(__kfifo_put(ts.event_fifo, (unsigned char *)buf, - sizeof(int) * 3) != sizeof(int) * 3)) - printk(KERN_ERR __FILE__":stylus_action bug.\n"); - - writel(WAIT4INT(1), base_addr + S3C2410_ADCTSC); - mod_timer(&event_send_timer, jiffies + 1); - - return IRQ_HANDLED; -} - -static struct clk *adc_clock; - -/* - * The functions for inserting/removing us as a module. - */ - -static int __init s3c2410ts_probe(struct platform_device *pdev) -{ - int rc; - struct s3c2410_ts_mach_info *info; - struct input_dev *input_dev; - int ret = 0; - - dev_info(&pdev->dev, "Starting\n"); - - info = (struct s3c2410_ts_mach_info *)pdev->dev.platform_data; - - if (!info) - { - dev_err(&pdev->dev, "Hm... too bad: no platform data for ts\n"); - return -EINVAL; - } - -#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG - printk(DEBUG_LVL "Entering s3c2410ts_init\n"); -#endif - - adc_clock = clk_get(NULL, "adc"); - if (!adc_clock) { - dev_err(&pdev->dev, "failed to get adc clock source\n"); - return -ENOENT; - } - clk_enable(adc_clock); - -#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG - printk(DEBUG_LVL "got and enabled clock\n"); -#endif - - base_addr = ioremap(S3C2410_PA_ADC,0x20); - if (base_addr == NULL) { - dev_err(&pdev->dev, "Failed to remap register block\n"); - ret = -ENOMEM; - goto bail0; - } - - - /* If we acutally are a S3C2410: Configure GPIOs */ - if (!strcmp(pdev->name, "s3c2410-ts")) - s3c2410_ts_connect(); - - if ((info->presc & 0xff) > 0) - writel(S3C2410_ADCCON_PRSCEN | - S3C2410_ADCCON_PRSCVL(info->presc&0xFF), - base_addr + S3C2410_ADCCON); - else - writel(0, base_addr+S3C2410_ADCCON); - - /* Initialise registers */ - if ((info->delay & 0xffff) > 0) - writel(info->delay & 0xffff, base_addr + S3C2410_ADCDLY); - - writel(WAIT4INT(0), base_addr + S3C2410_ADCTSC); - - /* Initialise input stuff */ - memset(&ts, 0, sizeof(struct s3c2410ts)); - input_dev = input_allocate_device(); - - if (!input_dev) { - dev_err(&pdev->dev, "Unable to allocate the input device\n"); - ret = -ENOMEM; - goto bail1; - } - - ts.dev = input_dev; - ts.dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_KEY) | - BIT_MASK(EV_ABS); - ts.dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); - input_set_abs_params(ts.dev, ABS_X, 0, 0x3FF, 0, 0); - input_set_abs_params(ts.dev, ABS_Y, 0, 0x3FF, 0, 0); - input_set_abs_params(ts.dev, ABS_PRESSURE, 0, 1, 0, 0); - - ts.dev->name = s3c2410ts_name; - ts.dev->id.bustype = BUS_RS232; - ts.dev->id.vendor = 0xDEAD; - ts.dev->id.product = 0xBEEF; - ts.dev->id.version = S3C2410TSVERSION; - ts.state = TS_STATE_STANDBY; - ts.event_fifo = kfifo_alloc(TS_EVENT_FIFO_SIZE, GFP_KERNEL, NULL); - if (IS_ERR(ts.event_fifo)) { - ret = -EIO; - goto bail2; - } - - /* create the filter chain set up for the 2 coordinates we produce */ - ts.chain = ts_filter_chain_create(pdev, info->filter_config, 2); - - if (IS_ERR(ts.chain)) - goto bail2; - - ts_filter_chain_clear(ts.chain); - - /* Get irqs */ - if (request_irq(IRQ_ADC, stylus_action, 0, - "s3c2410_action", ts.dev)) { - dev_err(&pdev->dev, "Could not allocate ts IRQ_ADC !\n"); - iounmap(base_addr); - ret = -EIO; - goto bail3; - } - if (request_irq(IRQ_TC, stylus_updown, 0, - "s3c2410_action", ts.dev)) { - dev_err(&pdev->dev, "Could not allocate ts IRQ_TC !\n"); - free_irq(IRQ_ADC, ts.dev); - iounmap(base_addr); - ret = -EIO; - goto bail4; - } - - dev_info(&pdev->dev, "Successfully loaded\n"); - - /* All went ok, so register to the input system */ - rc = input_register_device(ts.dev); - if (rc) { - ret = -EIO; - goto bail5; - } - - return 0; - -bail5: - free_irq(IRQ_TC, ts.dev); - free_irq(IRQ_ADC, ts.dev); - clk_disable(adc_clock); - iounmap(base_addr); - disable_irq(IRQ_TC); -bail4: - disable_irq(IRQ_ADC); -bail3: - ts_filter_chain_destroy(ts.chain); - kfifo_free(ts.event_fifo); -bail2: - input_unregister_device(ts.dev); -bail1: - iounmap(base_addr); -bail0: - - return ret; -} - -static int s3c2410ts_remove(struct platform_device *pdev) -{ - disable_irq(IRQ_ADC); - disable_irq(IRQ_TC); - free_irq(IRQ_TC,ts.dev); - free_irq(IRQ_ADC,ts.dev); - - if (adc_clock) { - clk_disable(adc_clock); - clk_put(adc_clock); - adc_clock = NULL; - } - - input_unregister_device(ts.dev); - iounmap(base_addr); - - ts_filter_chain_destroy(ts.chain); - - kfifo_free(ts.event_fifo); - - return 0; -} - -#ifdef CONFIG_PM -static int s3c2410ts_suspend(struct platform_device *pdev, pm_message_t state) -{ - writel(TSC_SLEEP, base_addr+S3C2410_ADCTSC); - writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_STDBM, - base_addr+S3C2410_ADCCON); - - disable_irq(IRQ_ADC); - disable_irq(IRQ_TC); - - clk_disable(adc_clock); - - return 0; -} - -static int s3c2410ts_resume(struct platform_device *pdev) -{ - struct s3c2410_ts_mach_info *info = - ( struct s3c2410_ts_mach_info *)pdev->dev.platform_data; - - clk_enable(adc_clock); - mdelay(1); - - ts_filter_chain_clear(ts.chain); - - enable_irq(IRQ_ADC); - enable_irq(IRQ_TC); - - if ((info->presc&0xff) > 0) - writel(S3C2410_ADCCON_PRSCEN | - S3C2410_ADCCON_PRSCVL(info->presc&0xFF), - base_addr+S3C2410_ADCCON); - else - writel(0,base_addr+S3C2410_ADCCON); - - /* Initialise registers */ - if ((info->delay & 0xffff) > 0) - writel(info->delay & 0xffff, base_addr+S3C2410_ADCDLY); - - writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC); - - return 0; -} - -#else -#define s3c2410ts_suspend NULL -#define s3c2410ts_resume NULL -#endif - -static struct platform_driver s3c2410ts_driver = { - .driver = { - .name = "s3c2410-ts", - .owner = THIS_MODULE, - }, - .probe = s3c2410ts_probe, - .remove = s3c2410ts_remove, - .suspend = s3c2410ts_suspend, - .resume = s3c2410ts_resume, - -}; - -static struct platform_driver s3c2440ts_driver = { - .driver = { - .name = "s3c2440-ts", - .owner = THIS_MODULE, - }, - .probe = s3c2410ts_probe, - .remove = s3c2410ts_remove, - .suspend = s3c2410ts_suspend, - .resume = s3c2410ts_resume, - -}; - -static int __init s3c2410ts_init(void) -{ - int rc; - - rc = platform_driver_register(&s3c2410ts_driver); - if (rc < 0) - return rc; - - rc = platform_driver_register(&s3c2440ts_driver); - if (rc < 0) - platform_driver_unregister(&s3c2410ts_driver); - - return rc; -} - -static void __exit s3c2410ts_exit(void) -{ - platform_driver_unregister(&s3c2440ts_driver); - platform_driver_unregister(&s3c2410ts_driver); -} - -module_init(s3c2410ts_init); -module_exit(s3c2410ts_exit); -