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Commit e4719d8d authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Nicolas Ferre
Browse files

Input: atmel_tsadcc: remove driver 



The atmel_tsadcc driver is not used anymore, it has been replaced by at91_adc so
remove it.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
parent 700a28a5

MAINTAINERS

+0 −6
Original line number Diff line number Diff line
@@ -1617,12 +1617,6 @@ S: Supported 
F:	drivers/misc/atmel_tclib.c

F:	drivers/clocksource/tcb_clksrc.c



ATMEL TSADCC DRIVER

M:	Josh Wu <josh.wu@atmel.com>

L:	linux-input@vger.kernel.org

S:	Supported

F:	drivers/input/touchscreen/atmel_tsadcc.c



ATMEL USBA UDC DRIVER

M:	Nicolas Ferre <nicolas.ferre@atmel.com>

L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)

drivers/input/touchscreen/Kconfig

+0 −12
Original line number Diff line number Diff line
@@ -550,18 +550,6 @@ config TOUCHSCREEN_TI_AM335X_TSC 
	  To compile this driver as a module, choose M here: the

	  module will be called ti_am335x_tsc.



config TOUCHSCREEN_ATMEL_TSADCC

	tristate "Atmel Touchscreen Interface"

	depends on ARCH_AT91

	help

	  Say Y here if you have a 4-wire touchscreen connected to the

          ADC Controller on your Atmel SoC.



	  If unsure, say N.



	  To compile this driver as a module, choose M here: the

	  module will be called atmel_tsadcc.



config TOUCHSCREEN_UCB1400

	tristate "Philips UCB1400 touchscreen"

	depends on AC97_BUS

drivers/input/touchscreen/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -13,7 +13,6 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_I2C) += ad7879-i2c.o 
obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI)	+= ad7879-spi.o

obj-$(CONFIG_TOUCHSCREEN_ADS7846)	+= ads7846.o

obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT)	+= atmel_mxt_ts.o

obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC)	+= atmel_tsadcc.o

obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR)	+= auo-pixcir-ts.o

obj-$(CONFIG_TOUCHSCREEN_BU21013)	+= bu21013_ts.o

obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o

drivers/input/touchscreen/atmel_tsadcc.c

deleted100644 → 0
+0 −358
Original line number Diff line number Diff line 
/*

 *  Atmel Touch Screen Driver

 *

 *  Copyright (c) 2008 ATMEL

 *  Copyright (c) 2008 Dan Liang

 *  Copyright (c) 2008 TimeSys Corporation

 *  Copyright (c) 2008 Justin Waters

 *

 *  Based on touchscreen code from Atmel Corporation.

 *

 *  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.

 */

#include <linux/err.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/input.h>

#include <linux/slab.h>

#include <linux/interrupt.h>

#include <linux/clk.h>

#include <linux/platform_device.h>

#include <linux/io.h>

#include <linux/platform_data/atmel.h>

#include <mach/cpu.h>



/* Register definitions based on AT91SAM9RL64 preliminary draft datasheet */



#define ATMEL_TSADCC_CR		0x00	/* Control register */

#define   ATMEL_TSADCC_SWRST	(1 << 0)	/* Software Reset*/

#define	  ATMEL_TSADCC_START	(1 << 1)	/* Start conversion */



#define ATMEL_TSADCC_MR		0x04	/* Mode register */

#define	  ATMEL_TSADCC_TSAMOD	(3    <<  0)	/* ADC mode */

#define	    ATMEL_TSADCC_TSAMOD_ADC_ONLY_MODE	(0x0)	/* ADC Mode */

#define	    ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE	(0x1)	/* Touch Screen Only Mode */

#define	  ATMEL_TSADCC_LOWRES	(1    <<  4)	/* Resolution selection */

#define	  ATMEL_TSADCC_SLEEP	(1    <<  5)	/* Sleep mode */

#define	  ATMEL_TSADCC_PENDET	(1    <<  6)	/* Pen Detect selection */

#define	  ATMEL_TSADCC_PRES	(1    <<  7)	/* Pressure Measurement Selection */

#define	  ATMEL_TSADCC_PRESCAL	(0x3f <<  8)	/* Prescalar Rate Selection */

#define	  ATMEL_TSADCC_EPRESCAL	(0xff <<  8)	/* Prescalar Rate Selection (Extended) */

#define	  ATMEL_TSADCC_STARTUP	(0x7f << 16)	/* Start Up time */

#define	  ATMEL_TSADCC_SHTIM	(0xf  << 24)	/* Sample & Hold time */

#define	  ATMEL_TSADCC_PENDBC	(0xf  << 28)	/* Pen Detect debouncing time */



#define ATMEL_TSADCC_TRGR	0x08	/* Trigger register */

#define	  ATMEL_TSADCC_TRGMOD	(7      <<  0)	/* Trigger mode */

#define	    ATMEL_TSADCC_TRGMOD_NONE		(0 << 0)

#define     ATMEL_TSADCC_TRGMOD_EXT_RISING	(1 << 0)

#define     ATMEL_TSADCC_TRGMOD_EXT_FALLING	(2 << 0)

#define     ATMEL_TSADCC_TRGMOD_EXT_ANY		(3 << 0)

#define     ATMEL_TSADCC_TRGMOD_PENDET		(4 << 0)

#define     ATMEL_TSADCC_TRGMOD_PERIOD		(5 << 0)

#define     ATMEL_TSADCC_TRGMOD_CONTINUOUS	(6 << 0)

#define   ATMEL_TSADCC_TRGPER	(0xffff << 16)	/* Trigger period */



#define ATMEL_TSADCC_TSR	0x0C	/* Touch Screen register */

#define	  ATMEL_TSADCC_TSFREQ	(0xf <<  0)	/* TS Frequency in Interleaved mode */

#define	  ATMEL_TSADCC_TSSHTIM	(0xf << 24)	/* Sample & Hold time */



#define ATMEL_TSADCC_CHER	0x10	/* Channel Enable register */

#define ATMEL_TSADCC_CHDR	0x14	/* Channel Disable register */

#define ATMEL_TSADCC_CHSR	0x18	/* Channel Status register */

#define	  ATMEL_TSADCC_CH(n)	(1 << (n))	/* Channel number */



#define ATMEL_TSADCC_SR		0x1C	/* Status register */

#define	  ATMEL_TSADCC_EOC(n)	(1 << ((n)+0))	/* End of conversion for channel N */

#define	  ATMEL_TSADCC_OVRE(n)	(1 << ((n)+8))	/* Overrun error for channel N */

#define	  ATMEL_TSADCC_DRDY	(1 << 16)	/* Data Ready */

#define	  ATMEL_TSADCC_GOVRE	(1 << 17)	/* General Overrun Error */

#define	  ATMEL_TSADCC_ENDRX	(1 << 18)	/* End of RX Buffer */

#define	  ATMEL_TSADCC_RXBUFF	(1 << 19)	/* TX Buffer full */

#define	  ATMEL_TSADCC_PENCNT	(1 << 20)	/* Pen contact */

#define	  ATMEL_TSADCC_NOCNT	(1 << 21)	/* No contact */



#define ATMEL_TSADCC_LCDR	0x20	/* Last Converted Data register */

#define	  ATMEL_TSADCC_DATA	(0x3ff << 0)	/* Channel data */



#define ATMEL_TSADCC_IER	0x24	/* Interrupt Enable register */

#define ATMEL_TSADCC_IDR	0x28	/* Interrupt Disable register */

#define ATMEL_TSADCC_IMR	0x2C	/* Interrupt Mask register */

#define ATMEL_TSADCC_CDR0	0x30	/* Channel Data 0 */

#define ATMEL_TSADCC_CDR1	0x34	/* Channel Data 1 */

#define ATMEL_TSADCC_CDR2	0x38	/* Channel Data 2 */

#define ATMEL_TSADCC_CDR3	0x3C	/* Channel Data 3 */

#define ATMEL_TSADCC_CDR4	0x40	/* Channel Data 4 */

#define ATMEL_TSADCC_CDR5	0x44	/* Channel Data 5 */



#define ATMEL_TSADCC_XPOS	0x50

#define ATMEL_TSADCC_Z1DAT	0x54

#define ATMEL_TSADCC_Z2DAT	0x58



#define PRESCALER_VAL(x)	((x) >> 8)



#define ADC_DEFAULT_CLOCK	100000



struct atmel_tsadcc {

	struct input_dev	*input;

	char			phys[32];

	struct clk		*clk;

	int			irq;

	unsigned int		prev_absx;

	unsigned int		prev_absy;

	unsigned char		bufferedmeasure;

};



static void __iomem		*tsc_base;



#define atmel_tsadcc_read(reg)		__raw_readl(tsc_base + (reg))

#define atmel_tsadcc_write(reg, val)	__raw_writel((val), tsc_base + (reg))



static irqreturn_t atmel_tsadcc_interrupt(int irq, void *dev)

{

	struct atmel_tsadcc	*ts_dev = (struct atmel_tsadcc *)dev;

	struct input_dev	*input_dev = ts_dev->input;



	unsigned int status;

	unsigned int reg;



	status = atmel_tsadcc_read(ATMEL_TSADCC_SR);

	status &= atmel_tsadcc_read(ATMEL_TSADCC_IMR);



	if (status & ATMEL_TSADCC_NOCNT) {

		/* Contact lost */

		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR) | ATMEL_TSADCC_PENDBC;



		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);

		atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);

		atmel_tsadcc_write(ATMEL_TSADCC_IDR,

				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);

		atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);



		input_report_key(input_dev, BTN_TOUCH, 0);

		ts_dev->bufferedmeasure = 0;

		input_sync(input_dev);



	} else if (status & ATMEL_TSADCC_PENCNT) {

		/* Pen detected */

		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR);

		reg &= ~ATMEL_TSADCC_PENDBC;



		atmel_tsadcc_write(ATMEL_TSADCC_IDR, ATMEL_TSADCC_PENCNT);

		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);

		atmel_tsadcc_write(ATMEL_TSADCC_IER,

				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);

		atmel_tsadcc_write(ATMEL_TSADCC_TRGR,

				   ATMEL_TSADCC_TRGMOD_PERIOD | (0x0FFF << 16));



	} else if (status & ATMEL_TSADCC_EOC(3)) {

		/* Conversion finished */



		if (ts_dev->bufferedmeasure) {

			/* Last measurement is always discarded, since it can

			 * be erroneous.

			 * Always report previous measurement */

			input_report_abs(input_dev, ABS_X, ts_dev->prev_absx);

			input_report_abs(input_dev, ABS_Y, ts_dev->prev_absy);

			input_report_key(input_dev, BTN_TOUCH, 1);

			input_sync(input_dev);

		} else

			ts_dev->bufferedmeasure = 1;



		/* Now make new measurement */

		ts_dev->prev_absx = atmel_tsadcc_read(ATMEL_TSADCC_CDR3) << 10;

		ts_dev->prev_absx /= atmel_tsadcc_read(ATMEL_TSADCC_CDR2);



		ts_dev->prev_absy = atmel_tsadcc_read(ATMEL_TSADCC_CDR1) << 10;

		ts_dev->prev_absy /= atmel_tsadcc_read(ATMEL_TSADCC_CDR0);

	}



	return IRQ_HANDLED;

}



/*

 * The functions for inserting/removing us as a module.

 */



static int atmel_tsadcc_probe(struct platform_device *pdev)

{

	struct atmel_tsadcc	*ts_dev;

	struct input_dev	*input_dev;

	struct resource		*res;

	struct at91_tsadcc_data *pdata = dev_get_platdata(&pdev->dev);

	int		err;

	unsigned int	prsc;

	unsigned int	reg;



	if (!pdata)

		return -EINVAL;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res) {

		dev_err(&pdev->dev, "no mmio resource defined.\n");

		return -ENXIO;

	}



	/* Allocate memory for device */

	ts_dev = kzalloc(sizeof(struct atmel_tsadcc), GFP_KERNEL);

	if (!ts_dev) {

		dev_err(&pdev->dev, "failed to allocate memory.\n");

		return -ENOMEM;

	}

	platform_set_drvdata(pdev, ts_dev);



	input_dev = input_allocate_device();

	if (!input_dev) {

		dev_err(&pdev->dev, "failed to allocate input device.\n");

		err = -EBUSY;

		goto err_free_mem;

	}



	ts_dev->irq = platform_get_irq(pdev, 0);

	if (ts_dev->irq < 0) {

		dev_err(&pdev->dev, "no irq ID is designated.\n");

		err = -ENODEV;

		goto err_free_dev;

	}



	if (!request_mem_region(res->start, resource_size(res),

				"atmel tsadcc regs")) {

		dev_err(&pdev->dev, "resources is unavailable.\n");

		err = -EBUSY;

		goto err_free_dev;

	}



	tsc_base = ioremap(res->start, resource_size(res));

	if (!tsc_base) {

		dev_err(&pdev->dev, "failed to map registers.\n");

		err = -ENOMEM;

		goto err_release_mem;

	}



	err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, 0,

			pdev->dev.driver->name, ts_dev);

	if (err) {

		dev_err(&pdev->dev, "failed to allocate irq.\n");

		goto err_unmap_regs;

	}



	ts_dev->clk = clk_get(&pdev->dev, "tsc_clk");

	if (IS_ERR(ts_dev->clk)) {

		dev_err(&pdev->dev, "failed to get ts_clk\n");

		err = PTR_ERR(ts_dev->clk);

		goto err_free_irq;

	}



	ts_dev->input = input_dev;

	ts_dev->bufferedmeasure = 0;



	snprintf(ts_dev->phys, sizeof(ts_dev->phys),

		 "%s/input0", dev_name(&pdev->dev));



	input_dev->name = "atmel touch screen controller";

	input_dev->phys = ts_dev->phys;

	input_dev->dev.parent = &pdev->dev;



	__set_bit(EV_ABS, input_dev->evbit);

	input_set_abs_params(input_dev, ABS_X, 0, 0x3FF, 0, 0);

	input_set_abs_params(input_dev, ABS_Y, 0, 0x3FF, 0, 0);



	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);



	/* clk_enable() always returns 0, no need to check it */

	clk_enable(ts_dev->clk);



	prsc = clk_get_rate(ts_dev->clk);

	dev_info(&pdev->dev, "Master clock is set at: %d Hz\n", prsc);



	if (!pdata->adc_clock)

		pdata->adc_clock = ADC_DEFAULT_CLOCK;



	prsc = (prsc / (2 * pdata->adc_clock)) - 1;



	/* saturate if this value is too high */

	if (cpu_is_at91sam9rl()) {

		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_PRESCAL))

			prsc = PRESCALER_VAL(ATMEL_TSADCC_PRESCAL);

	} else {

		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL))

			prsc = PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL);

	}



	dev_info(&pdev->dev, "Prescaler is set at: %d\n", prsc);



	reg = ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE		|

		((0x00 << 5) & ATMEL_TSADCC_SLEEP)	|	/* Normal Mode */

		((0x01 << 6) & ATMEL_TSADCC_PENDET)	|	/* Enable Pen Detect */

		(prsc << 8)				|

		((0x26 << 16) & ATMEL_TSADCC_STARTUP)	|

		((pdata->pendet_debounce << 28) & ATMEL_TSADCC_PENDBC);



	atmel_tsadcc_write(ATMEL_TSADCC_CR, ATMEL_TSADCC_SWRST);

	atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);

	atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);

	atmel_tsadcc_write(ATMEL_TSADCC_TSR,

		(pdata->ts_sample_hold_time << 24) & ATMEL_TSADCC_TSSHTIM);



	atmel_tsadcc_read(ATMEL_TSADCC_SR);

	atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);



	/* All went ok, so register to the input system */

	err = input_register_device(input_dev);

	if (err)

		goto err_fail;



	return 0;



err_fail:

	clk_disable(ts_dev->clk);

	clk_put(ts_dev->clk);

err_free_irq:

	free_irq(ts_dev->irq, ts_dev);

err_unmap_regs:

	iounmap(tsc_base);

err_release_mem:

	release_mem_region(res->start, resource_size(res));

err_free_dev:

	input_free_device(input_dev);

err_free_mem:

	kfree(ts_dev);

	return err;

}



static int atmel_tsadcc_remove(struct platform_device *pdev)

{

	struct atmel_tsadcc *ts_dev = platform_get_drvdata(pdev);

	struct resource *res;



	free_irq(ts_dev->irq, ts_dev);



	input_unregister_device(ts_dev->input);



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	iounmap(tsc_base);

	release_mem_region(res->start, resource_size(res));



	clk_disable(ts_dev->clk);

	clk_put(ts_dev->clk);



	kfree(ts_dev);



	return 0;

}



static struct platform_driver atmel_tsadcc_driver = {

	.probe		= atmel_tsadcc_probe,

	.remove		= atmel_tsadcc_remove,

	.driver		= {

		.name	= "atmel_tsadcc",

	},

};

module_platform_driver(atmel_tsadcc_driver);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Atmel TouchScreen Driver");

MODULE_AUTHOR("Dan Liang <dan.liang@atmel.com>");