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path: root/drivers/input/touchscreen

Age	Commit message (Expand)	Author
2012-01-13	module_param: make bool parameters really bool (drivers & misc)	Rusty Russell
2012-01-12	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dto...	Linus Torvalds
2012-01-10	Input: revert some over-zealous conversions to module_platform_driver()	Dmitry Torokhov
2012-01-10	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dto...	Linus Torvalds
2012-01-09	Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc	Linus Torvalds
2012-01-08	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/...	Linus Torvalds
2012-01-08	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vi...	Linus Torvalds
2012-01-04	Input: ucb1400-ts - switch to using dev_xxx() for diagnostic messages	Dmitry Torokhov
2012-01-04	Input: ucb1400_ts - convert to threaded IRQ	Dmitry Torokhov
2012-01-04	Input: ucb1400_ts - drop inline annotations	Dmitry Torokhov
2012-01-04	Input: usb1400_ts - add __devinit/__devexit section annotations	Dmitry Torokhov
2012-01-04	Input: ucb1400_ts - set driver owner	Dmitry Torokhov
2012-01-04	Input: ucb1400_ts - convert to use dev_pm_ops	Dmitry Torokhov
2012-01-03	switch ->is_visible() to returning umode_t	Al Viro
2011-12-30	Input: add driver for pixcir i2c touchscreens	Jianchun Bian
2011-12-28	Input: zylonite-wm97xx - replace IRQ_GPIO() with gpio_to_irq()	Axel Lin
2011-12-27	Input: add driver for AUO In-Cell touchscreens using pixcir ICs	Heiko Stübner
2011-12-25	PM / input / touchscreen: Make st1232 use device PM QoS constraints	Rafael J. Wysocki
2011-12-12	Input: migor-ts - rework probe() to simplify error path	Dmitry Torokhov
2011-12-12	Input: migor-ts - use proper client data accessor functions	Dmitry Torokhov
2011-12-12	Input: migor-ts - convert to a threaded IRQ	Dmitry Torokhov
2011-11-30	Input: htcpen - switch to DMI-based autoloading	Dmitry Torokhov
2011-11-30	Input: ad7879-i2c - use swapped variant of i2c_smbus_read_word_data	Jonathan Cameron
2011-11-30	Input: touchscreen - use macro module_platform_driver()	JJ Ding
2011-11-29	Input: remove redundant spi driver bus initialization	Lars-Peter Clausen
2011-11-29	Input: ad7879-i2c - remove redundant MODULE_ALIAS	Axel Lin
2011-11-29	Merge commit 'v3.2-rc3' into next	Dmitry Torokhov
2011-11-18	USB: convert drivers/input/* to use module_usb_driver()	Greg Kroah-Hartman
2011-11-15	Input: ad7879 - consolidate PM methods	Dmitry Torokhov
2011-11-15	Input: add EETI eGalax I2C capacitive multi touch driver	Zhang Jiejing
2011-11-09	Input: convert obsolete strict_strtox to kstrtox	JJ Ding
2011-11-06	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kern...	Linus Torvalds
2011-11-05	Input: usbtouchscreen - add ELO IntelliTouch 2700 support	Michael Gebetsroither
2011-11-03	Merge branch 'for-next' of git://git.infradead.org/users/sameo/mfd-2.6	Linus Torvalds
2011-10-31	drivers/input: Add module.h to modular drivers implicitly using it	Paul Gortmaker
2011-10-26	Merge branch 'next' into for-linus	Dmitry Torokhov
2011-10-24	input: Convert mc13783-ts to mc13xxx API	Uwe Kleine-König
2011-10-11	Input: tsc2007 - make sure that X plate resistance is specified	Philip Rakity
2011-10-06	Input: ad7879-i2c - wrap suspend and resume in CONFIG_PM_SLEEP	Dmitry Torokhov
2011-10-06	Input: atmel_mxt_ts - use snprintf for sysfs attribute show method	Daniel Kurtz
2011-09-28	Input: add a driver for TSC-40 serial touchscreen	Sebastian Andrzej Siewior
2011-09-20	Input: penmount - simplify unregister procedure	Dmitry Torokhov
2011-09-20	Input: penmount - rework handling of different protocols	Dmitry Torokhov
2011-09-20	Input: penmount - add PenMount 6250 support	John Sung
2011-09-20	Input: penmount - add PenMount 3000 support	John Sung
2011-09-20	Input: penmount - add PenMount 6000 support	John Sung
2011-09-20	Input: penmount - fix the protocol	John Sung
2011-09-08	Input: wacom - add POINTER and DIRECT device properties	Jason Gerecke
2011-09-07	Input: remove IRQF_DISABLED from drivers	Yong Zhang
2011-09-07	Merge commit 'v3.1-rc4' into next	Dmitry Torokhov

• [next]

generated by cgit v1.2.3 (git 2.25.1) at 2024-09-10 12:57:10 +0000

/*
 * Provides I2C support for Philips PNX010x/PNX4008 boards.
 *
 * Authors: Dennis Kovalev <dkovalev@ru.mvista.com>
 *	    Vitaly Wool <vwool@ru.mvista.com>
 *
 * 2004-2006 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/timer.h>
#include <linux/completion.h>
#include <linux/platform_device.h>
#include <linux/i2c-pnx.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/slab.h>

#include <mach/hardware.h>
#include <mach/i2c.h>

#define I2C_PNX_TIMEOUT		10 /* msec */
#define I2C_PNX_SPEED_KHZ	100
#define I2C_PNX_REGION_SIZE	0x100

static inline int wait_timeout(long timeout, struct i2c_pnx_algo_data *data)
{
	while (timeout > 0 &&
			(ioread32(I2C_REG_STS(data)) & mstatus_active)) {
		mdelay(1);
		timeout--;
	}
	return (timeout <= 0);
}

static inline int wait_reset(long timeout, struct i2c_pnx_algo_data *data)
{
	while (timeout > 0 &&
			(ioread32(I2C_REG_CTL(data)) & mcntrl_reset)) {
		mdelay(1);
		timeout--;
	}
	return (timeout <= 0);
}

static inline void i2c_pnx_arm_timer(struct i2c_pnx_algo_data *alg_data)
{
	struct timer_list *timer = &alg_data->mif.timer;
	unsigned long expires = msecs_to_jiffies(I2C_PNX_TIMEOUT);

	if (expires <= 1)
		expires = 2;

	del_timer_sync(timer);

	dev_dbg(&alg_data->adapter.dev, "Timer armed at %lu plus %lu jiffies.\n",
		jiffies, expires);

	timer->expires = jiffies + expires;
	timer->data = (unsigned long)alg_data;

	add_timer(timer);
}

/**
 * i2c_pnx_start - start a device
 * @slave_addr:		slave address
 * @adap:		pointer to adapter structure
 *
 * Generate a START signal in the desired mode.
 */
static int i2c_pnx_start(unsigned char slave_addr,
	struct i2c_pnx_algo_data *alg_data)
{
	dev_dbg(&alg_data->adapter.dev, "%s(): addr 0x%x mode %d\n", __func__,
		slave_addr, alg_data->mif.mode);

	/* Check for 7 bit slave addresses only */
	if (slave_addr & ~0x7f) {
		dev_err(&alg_data->adapter.dev,
			"%s: Invalid slave address %x. Only 7-bit addresses are supported\n",
			alg_data->adapter.name, slave_addr);
		return -EINVAL;
	}

	/* First, make sure bus is idle */
	if (wait_timeout(I2C_PNX_TIMEOUT, alg_data)) {
		/* Somebody else is monopolizing the bus */
		dev_err(&alg_data->adapter.dev,
			"%s: Bus busy. Slave addr = %02x, cntrl = %x, stat = %x\n",
			alg_data->adapter.name, slave_addr,
			ioread32(I2C_REG_CTL(alg_data)),
			ioread32(I2C_REG_STS(alg_data)));
		return -EBUSY;
	} else if (ioread32(I2C_REG_STS(alg_data)) & mstatus_afi) {
		/* Sorry, we lost the bus */
		dev_err(&alg_data->adapter.dev,
		        "%s: Arbitration failure. Slave addr = %02x\n",
			alg_data->adapter.name, slave_addr);
		return -EIO;
	}

	/*
	 * OK, I2C is enabled and we have the bus.
	 * Clear the current TDI and AFI status flags.
	 */
	iowrite32(ioread32(I2C_REG_STS(alg_data)) | mstatus_tdi | mstatus_afi,
		  I2C_REG_STS(alg_data));

	dev_dbg(&alg_data->adapter.dev, "%s(): sending %#x\n", __func__,
		(slave_addr << 1) | start_bit | alg_data->mif.mode);

	/* Write the slave address, START bit and R/W bit */
	iowrite32((slave_addr << 1) | start_bit | alg_data->mif.mode,
		  I2C_REG_TX(alg_data));

	dev_dbg(&alg_data->adapter.dev, "%s(): exit\n", __func__);

	return 0;
}

/**
 * i2c_pnx_stop - stop a device
 * @adap:		pointer to I2C adapter structure
 *
 * Generate a STOP signal to terminate the master transaction.
 */
static void i2c_pnx_stop(struct i2c_pnx_algo_data *alg_data)
{
	/* Only 1 msec max timeout due to interrupt context */
	long timeout = 1000;

	dev_dbg(&alg_data->adapter.dev, "%s(): entering: stat = %04x.\n",
		__func__, ioread32(I2C_REG_STS(alg_data)));

	/* Write a STOP bit to TX FIFO */
	iowrite32(0xff | stop_bit, I2C_REG_TX(alg_data));

	/* Wait until the STOP is seen. */
	while (timeout > 0 &&
	       (ioread32(I2C_REG_STS(alg_data)) & mstatus_active)) {
		/* may be called from interrupt context */
		udelay(1);
		timeout--;
	}

	dev_dbg(&alg_data->adapter.dev, "%s(): exiting: stat = %04x.\n",
		__func__, ioread32(I2C_REG_STS(alg_data)));
}

/**
 * i2c_pnx_master_xmit - transmit data to slave
 * @adap:		pointer to I2C adapter structure
 *
 * Sends one byte of data to the slave
 */
static int i2c_pnx_master_xmit(struct i2c_pnx_algo_data *alg_data)
{
	u32 val;

	dev_dbg(&alg_data->adapter.dev, "%s(): entering: stat = %04x.\n",
		__func__, ioread32(I2C_REG_STS(alg_data)));

	if (alg_data->mif.len > 0) {
		/* We still have something to talk about... */
		val = *alg_data->mif.buf++;

		if (alg_data->mif.len == 1)
			val |= stop_bit;

		alg_data->mif.len--;
		iowrite32(val, I2C_REG_TX(alg_data));

		dev_dbg(&alg_data->adapter.dev, "%s(): xmit %#x [%d]\n",
			__func__, val, alg_data->mif.len + 1);

		if (alg_data->mif.len == 0) {
			if (alg_data->last) {
				/* Wait until the STOP is seen. */
				if (wait_timeout(I2C_PNX_TIMEOUT, alg_data))
					dev_err(&alg_data->adapter.dev,
						"The bus is still active after timeout\n");
			}
			/* Disable master interrupts */
			iowrite32(ioread32(I2C_REG_CTL(alg_data)) &
				~(mcntrl_afie | mcntrl_naie | mcntrl_drmie),
				  I2C_REG_CTL(alg_data));

			del_timer_sync(&alg_data->mif.timer);

			dev_dbg(&alg_data->adapter.dev,
				"%s(): Waking up xfer routine.\n",
				__func__);

			complete(&alg_data->mif.complete);
		}
	} else if (alg_data->mif.len == 0) {
		/* zero-sized transfer */
		i2c_pnx_stop(alg_data);

		/* Disable master interrupts. */
		iowrite32(ioread32(