This adds support for touchscreen on Sharp Zaurus sl-5500. Please apply, Pavel
Signed-off-by: Pavel Machek <[EMAIL PROTECTED]> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -36,6 +36,15 @@ config TOUCHSCREEN_CORGI To compile this driver as a module, choose M here: the module will be called ads7846_ts. +config TOUCHSCREEN_COLLIE + tristate "Collie touchscreen (for Sharp SL-5500)" + depends on MCP_UCB1200 + help + Say Y here to enable the driver for the touchscreen on the + Sharp SL-5500 series of PDAs. + + If unsure, say N. + config TOUCHSCREEN_GUNZE tristate "Gunze AHL-51S touchscreen" select SERIO diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o +obj-$(CONFIG_TOUCHSCREEN_COLLIE)+= collie_ts.o obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtouch.o diff --git a/drivers/input/touchscreen/collie_ts.c b/drivers/input/touchscreen/collie_ts.c new file mode 100644 --- /dev/null +++ b/drivers/input/touchscreen/collie_ts.c @@ -0,0 +1,367 @@ +/* + * linux/drivers/input/touchscreen/collie_ts.c + * + * Copyright (C) 2001 Russell King, All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 21-Jan-2002 <[EMAIL PROTECTED]> : + * + * Added support for synchronous A/D mode. This mode is useful to + * avoid noise induced in the touchpanel by the LCD, provided that + * the UCB1x00 has a valid LCD sync signal routed to its ADCSYNC pin. + * It is important to note that the signal connected to the ADCSYNC + * pin should provide pulses even when the LCD is blanked, otherwise + * a pen touch needed to unblank the LCD will never be read. + */ +#include <linux/config.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/sched.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/input.h> +#include <linux/device.h> +#include <linux/slab.h> +#include <linux/kthread.h> + +#include <asm/dma.h> +#include <asm/semaphore.h> + +#include <asm/arch-sa1100/ucb1x00.h> + + +struct ucb1x00_ts { + struct input_dev idev; + struct ucb1x00 *ucb; + + struct semaphore irq_wait; + struct task_struct *rtask; + u16 x_res; + u16 y_res; + + int restart:1; + int adcsync:1; +}; + +/* + * Switch to interrupt mode. + */ +static inline void ucb1x00_ts_mode_int(struct ucb1x00_ts *ts) +{ + int val = UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | + UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | + UCB_TS_CR_MODE_INT; + if (ts->ucb->id == UCB_ID_1400_BUGGY) + val &= ~(UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW); + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, val); +} + +/* + * Switch to pressure mode, and read pressure. We don't need to wait + * here, since both plates are being driven. + */ +static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts) +{ + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | + UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | + UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); + + return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); +} + +/* + * Switch to X position mode and measure Y plate. We switch the plate + * configuration in pressure mode, then switch to position mode. This + * gives a faster response time. Even so, we need to wait about 55us + * for things to stabilise. + */ +static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts) +{ + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | + UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | + UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | + UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); + + udelay(55); + + return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); +} + +/* + * Switch to Y position mode and measure X plate. We switch the plate + * configuration in pressure mode, then switch to position mode. This + * gives a faster response time. Even so, we need to wait about 55us + * for things to stabilise. + */ +static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts) +{ + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | + UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | + UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | + UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); + + udelay(55); + + return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPX, ts->adcsync); +} + +/* + * Switch to X plate resistance mode. Set MX to ground, PX to + * supply. Measure current. + */ +static inline unsigned int ucb1x00_ts_read_xres(struct ucb1x00_ts *ts) +{ + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | + UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); + return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); +} + +/* + * Switch to Y plate resistance mode. Set MY to ground, PY to + * supply. Measure current. + */ +static inline unsigned int ucb1x00_ts_read_yres(struct ucb1x00_ts *ts) +{ + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, + UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | + UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); + return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); +} + +/* + * This is a RT kernel thread that handles the ADC accesses + * (mainly so we can use semaphores in the UCB1200 core code + * to serialise accesses to the ADC). The UCB1400 access + * functions are expected to be able to sleep as well. + */ +static int ucb1x00_thread(void *_ts) +{ + struct ucb1x00_ts *ts = _ts; + struct task_struct *tsk = current; + int valid; + + ts->rtask = tsk; + + /* + * We run as a real-time thread. However, thus far + * this doesn't seem to be necessary. + */ + tsk->policy = SCHED_FIFO; + tsk->rt_priority = 1; + + valid = 0; + for (;;) { + unsigned int x, y, p, val; + + ts->restart = 0; + + ucb1x00_adc_enable(ts->ucb); + + x = ucb1x00_ts_read_xpos(ts); + y = ucb1x00_ts_read_ypos(ts); + p = ucb1x00_ts_read_pressure(ts); + + /* + * Switch back to interrupt mode. + */ + ucb1x00_ts_mode_int(ts); + ucb1x00_adc_disable(ts->ucb); + + msleep(10); + + ucb1x00_enable(ts->ucb); + val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR); + + if (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW)) { + ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING); + ucb1x00_disable(ts->ucb); + + /* + * If we spat out a valid sample set last time, + * spit out a "pen off" sample here. + */ + if (valid) { + input_report_abs(&ts->idev, ABS_PRESSURE, 0); + input_sync(&ts->idev); + valid = 0; + } + + /* + * Since ucb1x00_enable_irq() might sleep due + * to the way the UCB1400 regs are accessed, we + * can't use set_task_state() before that call, + * and not changing state before enabling the + * interrupt is racy. A semaphore solves all + * those issues quite nicely. + */ + down_interruptible(&ts->irq_wait); + } else { + ucb1x00_disable(ts->ucb); + + /* + * Filtering is policy. Policy belongs in user + * space. We therefore leave it to user space + * to do any filtering they please. + */ + if (!ts->restart) { + input_report_abs(&ts->idev, ABS_X, x); + input_report_abs(&ts->idev, ABS_Y, y); + input_report_abs(&ts->idev, ABS_PRESSURE, p); + input_sync(&ts->idev); + valid = 1; + } + + msleep_interruptible(10); + } + + if (kthread_should_stop()) + break; + } + + ts->rtask = NULL; + return 0; +} + +/* + * We only detect touch screen _touches_ with this interrupt + * handler, and even then we just schedule our task. + */ +static void ucb1x00_ts_irq(int idx, void *id) +{ + struct ucb1x00_ts *ts = id; + ucb1x00_disable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING); + up(&ts->irq_wait); +} + +static int ucb1x00_ts_open(struct input_dev *idev) +{ + struct ucb1x00_ts *ts = (struct ucb1x00_ts *)idev; + int ret = 0; + struct task_struct *task; + + BUG_ON(ts->rtask); + + sema_init(&ts->irq_wait, 0); + ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts); + if (ret < 0) + goto out; + + /* + * If we do this at all, we should allow the user to + * measure and read the X and Y resistance at any time. + */ + ucb1x00_adc_enable(ts->ucb); + ts->x_res = ucb1x00_ts_read_xres(ts); + ts->y_res = ucb1x00_ts_read_yres(ts); + ucb1x00_adc_disable(ts->ucb); + + task = kthread_run(ucb1x00_thread, ts, "ktsd"); + if (!IS_ERR(task)) { + ret = 0; + } else { + ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); + ret = -EFAULT; + } + + out: + return ret; +} + +/* + * Release touchscreen resources. Disable IRQs. + */ +static void ucb1x00_ts_close(struct input_dev *idev) +{ + struct ucb1x00_ts *ts = (struct ucb1x00_ts *)idev; + + if (ts->rtask) + kthread_stop(ts->rtask); + + ucb1x00_enable(ts->ucb); + ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); + ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0); + ucb1x00_disable(ts->ucb); +} + +/* + * Initialisation. + */ +static int ucb1x00_ts_add(struct class_device *dev) +{ + struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); + struct ucb1x00_ts *ts; + + ts = kmalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL); + if (!ts) + return -ENOMEM; + + memset(ts, 0, sizeof(struct ucb1x00_ts)); + + ts->ucb = ucb; + ts->adcsync = UCB_NOSYNC; + + ts->idev.name = "Touchscreen panel"; + ts->idev.id.product = ts->ucb->id; + ts->idev.open = ucb1x00_ts_open; + ts->idev.close = ucb1x00_ts_close; + + set_bit(EV_ABS, ts->idev.evbit); + set_bit(ABS_X, ts->idev.absbit); + set_bit(ABS_Y, ts->idev.absbit); + set_bit(ABS_PRESSURE, ts->idev.absbit); + + input_register_device(&ts->idev); + + ucb->ts_data = ts; + + return 0; +} + +static void ucb1x00_ts_remove(struct class_device *dev) +{ + struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); + struct ucb1x00_ts *ts = ucb->ts_data; + + input_unregister_device(&ts->idev); + kfree(ts); +} + +static struct class_interface ucb1x00_ts_interface = { + .add = ucb1x00_ts_add, + .remove = ucb1x00_ts_remove, +}; + +static int __init ucb1x00_ts_init(void) +{ + return ucb1x00_register_interface(&ucb1x00_ts_interface); +} + +static void __exit ucb1x00_ts_exit(void) +{ + ucb1x00_unregister_interface(&ucb1x00_ts_interface); +} + +module_init(ucb1x00_ts_init); +module_exit(ucb1x00_ts_exit); + +MODULE_AUTHOR("Russell King <[EMAIL PROTECTED]>"); +MODULE_DESCRIPTION("UCB1x00 touchscreen driver"); +MODULE_LICENSE("GPL"); -- teflon -- maybe it is a trademark, but it should not be. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/