mfd: remove ucb1400 support

The ucb1400 MFD driver and its gpio and touchscreen child
drivers were only used on a few PXA machines that were unused
for a while and are now removed.

Removing these leaves the AC97 support as ALSA specific,
no other drivers are now connected through this interface.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Lee Jones <lee@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Marek Vasut <marex@denx.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Cc: linux-input@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 458 deletions

diff --git a/drivers/input/touchscreen/ucb1400_ts.c b/drivers/input/touchscreen/ucb1400_ts.c
deleted file mode 100644
index dfd3b35590c3..000000000000
--- a/drivers/input/touchscreen/ucb1400_ts.c
+++ /dev/null
@@ -1,458 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *  Philips UCB1400 touchscreen driver
- *
- *  Author:	Nicolas Pitre
- *  Created:	September 25, 2006
- *  Copyright:	MontaVista Software, Inc.
- *
- * Spliting done by: Marek Vasut <marek.vasut@gmail.com>
- * If something doesn't work and it worked before spliting, e-mail me,
- * dont bother Nicolas please ;-)
- *
- * This code is heavily based on ucb1x00-*.c copyrighted by Russell King
- * covering the UCB1100, UCB1200 and UCB1300..  Support for the UCB1400 has
- * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/input.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/ucb1400.h>
-
-#define UCB1400_TS_POLL_PERIOD	10 /* ms */
-
-static bool adcsync;
-static int ts_delay = 55; /* us */
-static int ts_delay_pressure;	/* us */
-
-/* Switch to interrupt mode. */
-static void ucb1400_ts_mode_int(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, 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_INT);
-}
-
-/*
- * Switch to pressure mode, and read pressure.  We don't need to wait
- * here, since both plates are being driven.
- */
-static unsigned int ucb1400_ts_read_pressure(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, 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);
-
-	udelay(ts_delay_pressure);
-
-	return ucb1400_adc_read(ucb->ac97, UCB_ADC_INP_TSPY, 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 unsigned int ucb1400_ts_read_xpos(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
-			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
-			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
-			UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
-
-	udelay(ts_delay);
-
-	return ucb1400_adc_read(ucb->ac97, UCB_ADC_INP_TSPY, 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 int ucb1400_ts_read_ypos(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
-			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
-			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
-			UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
-
-	udelay(ts_delay);
-
-	return ucb1400_adc_read(ucb->ac97, UCB_ADC_INP_TSPX, adcsync);
-}
-
-/*
- * Switch to X plate resistance mode.  Set MX to ground, PX to
- * supply.  Measure current.
- */
-static unsigned int ucb1400_ts_read_xres(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
-			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
-	return ucb1400_adc_read(ucb->ac97, 0, adcsync);
-}
-
-/*
- * Switch to Y plate resistance mode.  Set MY to ground, PY to
- * supply.  Measure current.
- */
-static unsigned int ucb1400_ts_read_yres(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
-			UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
-			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
-	return ucb1400_adc_read(ucb->ac97, 0, adcsync);
-}
-
-static int ucb1400_ts_pen_up(struct ucb1400_ts *ucb)
-{
-	unsigned short val = ucb1400_reg_read(ucb->ac97, UCB_TS_CR);
-
-	return val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW);
-}
-
-static void ucb1400_ts_irq_enable(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, UCB_IE_TSPX);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, UCB_IE_TSPX);
-}
-
-static void ucb1400_ts_irq_disable(struct ucb1400_ts *ucb)
-{
-	ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, 0);
-}
-
-static void ucb1400_ts_report_event(struct input_dev *idev, u16 pressure, u16 x, u16 y)
-{
-	input_report_abs(idev, ABS_X, x);
-	input_report_abs(idev, ABS_Y, y);
-	input_report_abs(idev, ABS_PRESSURE, pressure);
-	input_report_key(idev, BTN_TOUCH, 1);
-	input_sync(idev);
-}
-
-static void ucb1400_ts_event_release(struct input_dev *idev)
-{
-	input_report_abs(idev, ABS_PRESSURE, 0);
-	input_report_key(idev, BTN_TOUCH, 0);
-	input_sync(idev);
-}
-
-static void ucb1400_clear_pending_irq(struct ucb1400_ts *ucb)
-{
-	unsigned int isr;
-
-	isr = ucb1400_reg_read(ucb->ac97, UCB_IE_STATUS);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, isr);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
-
-	if (isr & UCB_IE_TSPX)
-		ucb1400_ts_irq_disable(ucb);
-	else
-		dev_dbg(&ucb->ts_idev->dev,
-			"ucb1400: unexpected IE_STATUS = %#x\n", isr);
-}
-
-/*
- * A restriction with interrupts exists when using the ucb1400, as
- * the codec read/write routines may sleep while waiting for codec
- * access completion and uses semaphores for access control to the
- * AC97 bus. Therefore the driver is forced to use threaded interrupt
- * handler.
- */
-static irqreturn_t ucb1400_irq(int irqnr, void *devid)
-{
-	struct ucb1400_ts *ucb = devid;
-	unsigned int x, y, p;
-
-	if (unlikely(irqnr != ucb->irq))
-		return IRQ_NONE;
-
-	ucb1400_clear_pending_irq(ucb);
-
-	/* Start with a small delay before checking pendown state */
-	msleep(UCB1400_TS_POLL_PERIOD);
-
-	while (!ucb->stopped && !ucb1400_ts_pen_up(ucb)) {
-		ucb1400_adc_enable(ucb->ac97);
-		x = ucb1400_ts_read_xpos(ucb);
-		y = ucb1400_ts_read_ypos(ucb);
-		p = ucb1400_ts_read_pressure(ucb);
-		ucb1400_adc_disable(ucb->ac97);
-
-		ucb1400_ts_report_event(ucb->ts_idev, p, x, y);
-
-		wait_event_timeout(ucb->ts_wait, ucb->stopped,
-				   msecs_to_jiffies(UCB1400_TS_POLL_PERIOD));
-	}
-
-	ucb1400_ts_event_release(ucb->ts_idev);
-
-	if (!ucb->stopped) {
-		/* Switch back to interrupt mode. */
-		ucb1400_ts_mode_int(ucb);
-		ucb1400_ts_irq_enable(ucb);
-	}
-
-	return IRQ_HANDLED;
-}
-
-static void ucb1400_ts_stop(struct ucb1400_ts *ucb)
-{
-	/* Signal IRQ thread to stop polling and disable the handler. */
-	ucb->stopped = true;
-	mb();
-	wake_up(&ucb->ts_wait);
-	disable_irq(ucb->irq);
-
-	ucb1400_ts_irq_disable(ucb);
-	ucb1400_reg_write(ucb->ac97, UCB_TS_CR, 0);
-}
-
-/* Must be called with ts->lock held */
-static void ucb1400_ts_start(struct ucb1400_ts *ucb)
-{
-	/* Tell IRQ thread that it may poll the device. */
-	ucb->stopped = false;
-	mb();
-
-	ucb1400_ts_mode_int(ucb);
-	ucb1400_ts_irq_enable(ucb);
-
-	enable_irq(ucb->irq);
-}
-
-static int ucb1400_ts_open(struct input_dev *idev)
-{
-	struct ucb1400_ts *ucb = input_get_drvdata(idev);
-
-	ucb1400_ts_start(ucb);
-
-	return 0;
-}
-
-static void ucb1400_ts_close(struct input_dev *idev)
-{
-	struct ucb1400_ts *ucb = input_get_drvdata(idev);
-
-	ucb1400_ts_stop(ucb);
-}
-
-#ifndef NO_IRQ
-#define NO_IRQ	0
-#endif
-
-/*
- * Try to probe our interrupt, rather than relying on lots of
- * hard-coded machine dependencies.
- */
-static int ucb1400_ts_detect_irq(struct ucb1400_ts *ucb,
-					   struct platform_device *pdev)
-{
-	unsigned long mask, timeout;
-
-	mask = probe_irq_on();
-
-	/* Enable the ADC interrupt. */
-	ucb1400_reg_write(ucb->ac97, UCB_IE_RIS, UCB_IE_ADC);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, UCB_IE_ADC);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0xffff);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
-
-	/* Cause an ADC interrupt. */
-	ucb1400_reg_write(ucb->ac97, UCB_ADC_CR, UCB_ADC_ENA);
-	ucb1400_reg_write(ucb->ac97, UCB_ADC_CR, UCB_ADC_ENA | UCB_ADC_START);
-
-	/* Wait for the conversion to complete. */
-	timeout = jiffies + HZ/2;
-	while (!(ucb1400_reg_read(ucb->ac97, UCB_ADC_DATA) &
-						UCB_ADC_DAT_VALID)) {
-		cpu_relax();
-		if (time_after(jiffies, timeout)) {
-			dev_err(&pdev->dev, "timed out in IRQ probe\n");
-			probe_irq_off(mask);
-			return -ENODEV;
-		}
-	}
-	ucb1400_reg_write(ucb->ac97, UCB_ADC_CR, 0);
-
-	/* Disable and clear interrupt. */
-	ucb1400_reg_write(ucb->ac97, UCB_IE_RIS, 0);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, 0);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0xffff);
-	ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
-
-	/* Read triggered interrupt. */
-	ucb->irq = probe_irq_off(mask);
-	if (ucb->irq < 0 || ucb->irq == NO_IRQ)
-		return -ENODEV;
-
-	return 0;
-}
-
-static int ucb1400_ts_probe(struct platform_device *pdev)
-{
-	struct ucb1400_ts *ucb = dev_get_platdata(&pdev->dev);
-	int error, x_res, y_res;
-	u16 fcsr;
-
-	ucb->ts_idev = input_allocate_device();
-	if (!ucb->ts_idev) {
-		error = -ENOMEM;
-		goto err;
-	}
-
-	/* Only in case the IRQ line wasn't supplied, try detecting it */
-	if (ucb->irq < 0) {
-		error = ucb1400_ts_detect_irq(ucb, pdev);
-		if (error) {
-			dev_err(&pdev->dev, "IRQ probe failed\n");
-			goto err_free_devs;
-		}
-	}
-	dev_dbg(&pdev->dev, "found IRQ %d\n", ucb->irq);
-
-	init_waitqueue_head(&ucb->ts_wait);
-
-	input_set_drvdata(ucb->ts_idev, ucb);
-
-	ucb->ts_idev->dev.parent	= &pdev->dev;
-	ucb->ts_idev->name		= "UCB1400 touchscreen interface";
-	ucb->ts_idev->id.vendor		= ucb1400_reg_read(ucb->ac97,
-						AC97_VENDOR_ID1);
-	ucb->ts_idev->id.product	= ucb->id;
-	ucb->ts_idev->open		= ucb1400_ts_open;
-	ucb->ts_idev->close		= ucb1400_ts_close;
-	ucb->ts_idev->evbit[0]		= BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
-	ucb->ts_idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-
-	/*
-	 * Enable ADC filter to prevent horrible jitter on Colibri.
-	 * This also further reduces jitter on boards where ADCSYNC
-	 * pin is connected.
-	 */
-	fcsr = ucb1400_reg_read(ucb->ac97, UCB_FCSR);
-	ucb1400_reg_write(ucb->ac97, UCB_FCSR, fcsr | UCB_FCSR_AVE);
-
-	ucb1400_adc_enable(ucb->ac97);
-	x_res = ucb1400_ts_read_xres(ucb);
-	y_res = ucb1400_ts_read_yres(ucb);
-	ucb1400_adc_disable(ucb->ac97);
-	dev_dbg(&pdev->dev, "x/y = %d/%d\n", x_res, y_res);
-
-	input_set_abs_params(ucb->ts_idev, ABS_X, 0, x_res, 0, 0);
-	input_set_abs_params(ucb->ts_idev, ABS_Y, 0, y_res, 0, 0);
-	input_set_abs_params(ucb->ts_idev, ABS_PRESSURE, 0, 0, 0, 0);
-
-	ucb1400_ts_stop(ucb);
-
-	error = request_threaded_irq(ucb->irq, NULL, ucb1400_irq,
-				     IRQF_TRIGGER_RISING | IRQF_ONESHOT,
-				     "UCB1400", ucb);
-	if (error) {
-		dev_err(&pdev->dev,
-			"unable to grab irq%d: %d\n", ucb->irq, error);
-		goto err_free_devs;
-	}
-
-	error = input_register_device(ucb->ts_idev);
-	if (error)
-		goto err_free_irq;
-
-	return 0;
-
-err_free_irq:
-	free_irq(ucb->irq, ucb);
-err_free_devs:
-	input_free_device(ucb->ts_idev);
-err:
-	return error;
-}
-
-static int ucb1400_ts_remove(struct platform_device *pdev)
-{
-	struct ucb1400_ts *ucb = dev_get_platdata(&pdev->dev);
-
-	free_irq(ucb->irq, ucb);
-	input_unregister_device(ucb->ts_idev);
-
-	return 0;
-}
-
-static int __maybe_unused ucb1400_ts_suspend(struct device *dev)
-{
-	struct ucb1400_ts *ucb = dev_get_platdata(dev);
-	struct input_dev *idev = ucb->ts_idev;
-
-	mutex_lock(&idev->mutex);
-
-	if (input_device_enabled(idev))
-		ucb1400_ts_stop(ucb);
-
-	mutex_unlock(&idev->mutex);
-	return 0;
-}
-
-static int __maybe_unused ucb1400_ts_resume(struct device *dev)
-{
-	struct ucb1400_ts *ucb = dev_get_platdata(dev);
-	struct input_dev *idev = ucb->ts_idev;
-
-	mutex_lock(&idev->mutex);
-
-	if (input_device_enabled(idev))
-		ucb1400_ts_start(ucb);
-
-	mutex_unlock(&idev->mutex);
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(ucb1400_ts_pm_ops,
-			 ucb1400_ts_suspend, ucb1400_ts_resume);
-
-static struct platform_driver ucb1400_ts_driver = {
-	.probe	= ucb1400_ts_probe,
-	.remove	= ucb1400_ts_remove,
-	.driver	= {
-		.name	= "ucb1400_ts",
-		.pm	= &ucb1400_ts_pm_ops,
-	},
-};
-module_platform_driver(ucb1400_ts_driver);
-
-module_param(adcsync, bool, 0444);
-MODULE_PARM_DESC(adcsync, "Synchronize touch readings with ADCSYNC pin.");
-
-module_param(ts_delay, int, 0444);
-MODULE_PARM_DESC(ts_delay, "Delay between panel setup and"
-			    " position read. Default = 55us.");
-
-module_param(ts_delay_pressure, int, 0444);
-MODULE_PARM_DESC(ts_delay_pressure,
-		"delay between panel setup and pressure read."
-		"  Default = 0us.");
-
-MODULE_DESCRIPTION("Philips UCB1400 touchscreen driver");
-MODULE_LICENSE("GPL");