Input: remove atmel-wm97xx touchscreen driver (082dc4dc) · Commits · 戴 / test

drivers/input/touchscreen/Kconfig

+0 −15

Original line number	Diff line number	Diff line
		@@ -795,21 +795,6 @@ config TOUCHSCREEN_WM9713
		Say Y here to enable support for the Wolfson Microelectronics
		WM9713 touchscreen controller.

		config TOUCHSCREEN_WM97XX_ATMEL
		tristate "WM97xx Atmel accelerated touch"
		depends on TOUCHSCREEN_WM97XX && AVR32
		help
		Say Y here for support for streaming mode with WM97xx touchscreens
		on Atmel AT91 or AVR32 systems with an AC97C module.

		Be aware that this will use channel B in the controller for
		streaming data, this must not conflict with other AC97C drivers.

		If unsure, say N.

		To compile this driver as a module, choose M here: the module will
		be called atmel-wm97xx.

		config TOUCHSCREEN_WM97XX_MAINSTONE
		tristate "WM97xx Mainstone/Palm accelerated touch"
		depends on TOUCHSCREEN_WM97XX && ARCH_PXA

drivers/input/touchscreen/Makefile

+0 −1

Original line number	Diff line number	Diff line
		@@ -97,7 +97,6 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o
		wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9705) += wm9705.o
		wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9712) += wm9712.o
		wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9713) += wm9713.o
		obj-$(CONFIG_TOUCHSCREEN_WM97XX_ATMEL) += atmel-wm97xx.o
		obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o
		obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o
		obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o

drivers/input/touchscreen/atmel-wm97xx.c

deleted100644 → 0

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Original line number	Diff line number	Diff line
		/*
		* Atmel AT91 and AVR32 continuous touch screen driver for Wolfson WM97xx AC97
		* codecs.
		*
		* Copyright (C) 2008 - 2009 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/module.h>
		#include <linux/moduleparam.h>
		#include <linux/kernel.h>
		#include <linux/init.h>
		#include <linux/delay.h>
		#include <linux/irq.h>
		#include <linux/interrupt.h>
		#include <linux/wm97xx.h>
		#include <linux/timer.h>
		#include <linux/gpio.h>
		#include <linux/io.h>
		#include <linux/slab.h>

		#define AC97C_ICA 0x10
		#define AC97C_CBRHR 0x30
		#define AC97C_CBSR 0x38
		#define AC97C_CBMR 0x3c
		#define AC97C_IER 0x54
		#define AC97C_IDR 0x58

		#define AC97C_RXRDY (1 << 4)
		#define AC97C_OVRUN (1 << 5)

		#define AC97C_CMR_SIZE_20 (0 << 16)
		#define AC97C_CMR_SIZE_18 (1 << 16)
		#define AC97C_CMR_SIZE_16 (2 << 16)
		#define AC97C_CMR_SIZE_10 (3 << 16)
		#define AC97C_CMR_CEM_LITTLE (1 << 18)
		#define AC97C_CMR_CEM_BIG (0 << 18)
		#define AC97C_CMR_CENA (1 << 21)

		#define AC97C_INT_CBEVT (1 << 4)

		#define AC97C_SR_CAEVT (1 << 3)

		#define AC97C_CH_MASK(slot) \
		(0x7 << (3 * (slot - 3)))
		#define AC97C_CH_ASSIGN(slot, channel) \
		(AC97C_CHANNEL_##channel << (3 * (slot - 3)))
		#define AC97C_CHANNEL_NONE 0x0
		#define AC97C_CHANNEL_B 0x2

		#define ac97c_writel(chip, reg, val) \
		__raw_writel((val), (chip)->regs + AC97C_##reg)
		#define ac97c_readl(chip, reg) \
		__raw_readl((chip)->regs + AC97C_##reg)

		#ifdef CONFIG_CPU_AT32AP700X
		#define ATMEL_WM97XX_AC97C_IOMEM (0xfff02800)
		#define ATMEL_WM97XX_AC97C_IRQ (29)
		#define ATMEL_WM97XX_GPIO_DEFAULT (32+16) /* Pin 16 on port B. */
		#else
		#error Unknown CPU, this driver only supports AT32AP700X CPUs.
		#endif

		struct continuous {
		u16 id; /* codec id */
		u8 code; /* continuous code */
		u8 reads; /* number of coord reads per read cycle */
		u32 speed; /* number of coords per second */
		};

		#define WM_READS(sp) ((sp / HZ) + 1)

		static const struct continuous cinfo[] = {
		{WM9705_ID2, 0, WM_READS(94), 94},
		{WM9705_ID2, 1, WM_READS(188), 188},
		{WM9705_ID2, 2, WM_READS(375), 375},
		{WM9705_ID2, 3, WM_READS(750), 750},
		{WM9712_ID2, 0, WM_READS(94), 94},
		{WM9712_ID2, 1, WM_READS(188), 188},
		{WM9712_ID2, 2, WM_READS(375), 375},
		{WM9712_ID2, 3, WM_READS(750), 750},
		{WM9713_ID2, 0, WM_READS(94), 94},
		{WM9713_ID2, 1, WM_READS(120), 120},
		{WM9713_ID2, 2, WM_READS(154), 154},
		{WM9713_ID2, 3, WM_READS(188), 188},
		};

		/* Continuous speed index. */
		static int sp_idx;

		/*
		* Pen sampling frequency (Hz) in continuous mode.
		*/
		static int cont_rate = 188;
		module_param(cont_rate, int, 0);
		MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)");

		/*
		* Pen down detection.
		*
		* This driver can either poll or use an interrupt to indicate a pen down
		* event. If the irq request fails then it will fall back to polling mode.
		*/
		static int pen_int = 1;
		module_param(pen_int, int, 0);
		MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)");

		/*
		* Pressure readback.
		*
		* Set to 1 to read back pen down pressure.
		*/
		static int pressure;
		module_param(pressure, int, 0);
		MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)");

		/*
		* AC97 touch data slot.
		*
		* Touch screen readback data ac97 slot.
		*/
		static int ac97_touch_slot = 5;
		module_param(ac97_touch_slot, int, 0);
		MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number");

		/*
		* GPIO line number.
		*
		* Set to GPIO number where the signal from the WM97xx device is hooked up.
		*/
		static int atmel_gpio_line = ATMEL_WM97XX_GPIO_DEFAULT;
		module_param(atmel_gpio_line, int, 0);
		MODULE_PARM_DESC(atmel_gpio_line, "GPIO line number connected to WM97xx");

		struct atmel_wm97xx {
		struct wm97xx *wm;
		struct timer_list pen_timer;
		void __iomem *regs;
		unsigned long ac97c_irq;
		unsigned long gpio_pen;
		unsigned long gpio_irq;
		unsigned short x;
		unsigned short y;
		};

		static irqreturn_t atmel_wm97xx_channel_b_interrupt(int irq, void *dev_id)
		{
		struct atmel_wm97xx *atmel_wm97xx = dev_id;
		struct wm97xx *wm = atmel_wm97xx->wm;
		int status = ac97c_readl(atmel_wm97xx, CBSR);
		irqreturn_t retval = IRQ_NONE;

		if (status & AC97C_OVRUN) {
		dev_dbg(&wm->touch_dev->dev, "AC97C overrun\n");
		ac97c_readl(atmel_wm97xx, CBRHR);
		retval = IRQ_HANDLED;
		} else if (status & AC97C_RXRDY) {
		u16 data;
		u16 value;
		u16 source;
		u16 pen_down;

		data = ac97c_readl(atmel_wm97xx, CBRHR);
		value = data & 0x0fff;
		source = data & WM97XX_ADCSEL_MASK;
		pen_down = (data & WM97XX_PEN_DOWN) >> 8;

		if (source == WM97XX_ADCSEL_X)
		atmel_wm97xx->x = value;
		if (source == WM97XX_ADCSEL_Y)
		atmel_wm97xx->y = value;

		if (!pressure && source == WM97XX_ADCSEL_Y) {
		input_report_abs(wm->input_dev, ABS_X, atmel_wm97xx->x);
		input_report_abs(wm->input_dev, ABS_Y, atmel_wm97xx->y);
		input_report_key(wm->input_dev, BTN_TOUCH, pen_down);
		input_sync(wm->input_dev);
		} else if (pressure && source == WM97XX_ADCSEL_PRES) {
		input_report_abs(wm->input_dev, ABS_X, atmel_wm97xx->x);
		input_report_abs(wm->input_dev, ABS_Y, atmel_wm97xx->y);
		input_report_abs(wm->input_dev, ABS_PRESSURE, value);
		input_report_key(wm->input_dev, BTN_TOUCH, value);
		input_sync(wm->input_dev);
		}

		retval = IRQ_HANDLED;
		}

		return retval;
		}

		static void atmel_wm97xx_acc_pen_up(struct wm97xx *wm)
		{
		struct atmel_wm97xx *atmel_wm97xx = platform_get_drvdata(wm->touch_dev);
		struct input_dev *input_dev = wm->input_dev;
		int pen_down = gpio_get_value(atmel_wm97xx->gpio_pen);

		if (pen_down != 0) {
		mod_timer(&atmel_wm97xx->pen_timer,
		jiffies + msecs_to_jiffies(1));
		} else {
		if (pressure)
		input_report_abs(input_dev, ABS_PRESSURE, 0);
		input_report_key(input_dev, BTN_TOUCH, 0);
		input_sync(input_dev);
		}
		}

		static void atmel_wm97xx_pen_timer(struct timer_list *t)
		{
		struct atmel_wm97xx *atmel_wm97xx = from_timer(atmel_wm97xx, t,
		pen_timer);

		atmel_wm97xx_acc_pen_up(atmel_wm97xx->wm);
		}

		static int atmel_wm97xx_acc_startup(struct wm97xx *wm)
		{
		struct atmel_wm97xx *atmel_wm97xx = platform_get_drvdata(wm->touch_dev);
		int idx = 0;

		if (wm->ac97 == NULL)
		return -ENODEV;

		for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) {
		if (wm->id != cinfo[idx].id)
		continue;

		sp_idx = idx;

		if (cont_rate <= cinfo[idx].speed)
		break;
		}

		wm->acc_rate = cinfo[sp_idx].code;
		wm->acc_slot = ac97_touch_slot;
		dev_info(&wm->touch_dev->dev, "atmel accelerated touchscreen driver, "
		"%d samples/sec\n", cinfo[sp_idx].speed);

		if (pen_int) {
		unsigned long reg;

		wm->pen_irq = atmel_wm97xx->gpio_irq;

		switch (wm->id) {
		case WM9712_ID2: /* Fall through. */
		case WM9713_ID2:
		/*
		* Use GPIO 13 (PEN_DOWN) to assert GPIO line 3
		* (PENDOWN).
		*/
		wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN,
		WM97XX_GPIO_POL_HIGH,
		WM97XX_GPIO_STICKY,
		WM97XX_GPIO_WAKE);
		wm97xx_config_gpio(wm, WM97XX_GPIO_3, WM97XX_GPIO_OUT,
		WM97XX_GPIO_POL_HIGH,
		WM97XX_GPIO_NOTSTICKY,
		WM97XX_GPIO_NOWAKE);
		case WM9705_ID2: /* Fall through. */
		/*
		* Enable touch data slot in AC97 controller channel B.
		*/
		reg = ac97c_readl(atmel_wm97xx, ICA);
		reg &= ~AC97C_CH_MASK(wm->acc_slot);
		reg \|= AC97C_CH_ASSIGN(wm->acc_slot, B);
		ac97c_writel(atmel_wm97xx, ICA, reg);

		/*
		* Enable channel and interrupt for RXRDY and OVERRUN.
		*/
		ac97c_writel(atmel_wm97xx, CBMR, AC97C_CMR_CENA
		\| AC97C_CMR_CEM_BIG
		\| AC97C_CMR_SIZE_16
		\| AC97C_OVRUN
		\| AC97C_RXRDY);
		/* Dummy read to empty RXRHR. */
		ac97c_readl(atmel_wm97xx, CBRHR);
		/*
		* Enable interrupt for channel B in the AC97
		* controller.
		*/
		ac97c_writel(atmel_wm97xx, IER, AC97C_INT_CBEVT);
		break;
		default:
		dev_err(&wm->touch_dev->dev, "pen down irq not "
		"supported on this device\n");
		pen_int = 0;
		break;
		}
		}

		return 0;
		}

		static void atmel_wm97xx_acc_shutdown(struct wm97xx *wm)
		{
		if (pen_int) {
		struct atmel_wm97xx *atmel_wm97xx =
		platform_get_drvdata(wm->touch_dev);
		unsigned long ica;

		switch (wm->id & 0xffff) {
		case WM9705_ID2: /* Fall through. */
		case WM9712_ID2: /* Fall through. */
		case WM9713_ID2:
		/* Disable slot and turn off channel B interrupts. */
		ica = ac97c_readl(atmel_wm97xx, ICA);
		ica &= ~AC97C_CH_MASK(wm->acc_slot);
		ac97c_writel(atmel_wm97xx, ICA, ica);
		ac97c_writel(atmel_wm97xx, IDR, AC97C_INT_CBEVT);
		ac97c_writel(atmel_wm97xx, CBMR, 0);
		wm->pen_irq = 0;
		break;
		default:
		dev_err(&wm->touch_dev->dev, "unknown codec\n");
		break;
		}
		}
		}

		static void atmel_wm97xx_irq_enable(struct wm97xx *wm, int enable)
		{
		/* Intentionally left empty. */
		}

		static struct wm97xx_mach_ops atmel_mach_ops = {
		.acc_enabled = 1,
		.acc_pen_up = atmel_wm97xx_acc_pen_up,
		.acc_startup = atmel_wm97xx_acc_startup,
		.acc_shutdown = atmel_wm97xx_acc_shutdown,
		.irq_enable = atmel_wm97xx_irq_enable,
		.irq_gpio = WM97XX_GPIO_3,
		};

		static int __init atmel_wm97xx_probe(struct platform_device *pdev)
		{
		struct wm97xx *wm = platform_get_drvdata(pdev);
		struct atmel_wm97xx *atmel_wm97xx;
		int ret;

		atmel_wm97xx = kzalloc(sizeof(struct atmel_wm97xx), GFP_KERNEL);
		if (!atmel_wm97xx)
		return -ENOMEM;

		atmel_wm97xx->wm = wm;
		atmel_wm97xx->regs = (void *)ATMEL_WM97XX_AC97C_IOMEM;
		atmel_wm97xx->ac97c_irq = ATMEL_WM97XX_AC97C_IRQ;
		atmel_wm97xx->gpio_pen = atmel_gpio_line;
		atmel_wm97xx->gpio_irq = gpio_to_irq(atmel_wm97xx->gpio_pen);

		timer_setup(&atmel_wm97xx->pen_timer, atmel_wm97xx_pen_timer, 0);

		ret = request_irq(atmel_wm97xx->ac97c_irq,
		atmel_wm97xx_channel_b_interrupt,
		IRQF_SHARED, "atmel-wm97xx-ch-b", atmel_wm97xx);
		if (ret) {
		dev_dbg(&pdev->dev, "could not request ac97c irq\n");
		goto err;
		}

		platform_set_drvdata(pdev, atmel_wm97xx);

		ret = wm97xx_register_mach_ops(wm, &atmel_mach_ops);
		if (ret)
		goto err_irq;

		return ret;

		err_irq:
		free_irq(atmel_wm97xx->ac97c_irq, atmel_wm97xx);
		err:
		kfree(atmel_wm97xx);
		return ret;
		}

		static int __exit atmel_wm97xx_remove(struct platform_device *pdev)
		{
		struct atmel_wm97xx *atmel_wm97xx = platform_get_drvdata(pdev);
		struct wm97xx *wm = atmel_wm97xx->wm;

		ac97c_writel(atmel_wm97xx, IDR, AC97C_INT_CBEVT);
		free_irq(atmel_wm97xx->ac97c_irq, atmel_wm97xx);
		del_timer_sync(&atmel_wm97xx->pen_timer);
		wm97xx_unregister_mach_ops(wm);
		kfree(atmel_wm97xx);

		return 0;
		}

		#ifdef CONFIG_PM_SLEEP
		static int atmel_wm97xx_suspend(struct device *dev)
		{
		struct platform_device *pdev = to_platform_device(dev);
		struct atmel_wm97xx *atmel_wm97xx = platform_get_drvdata(pdev);

		ac97c_writel(atmel_wm97xx, IDR, AC97C_INT_CBEVT);
		disable_irq(atmel_wm97xx->gpio_irq);
		del_timer_sync(&atmel_wm97xx->pen_timer);

		return 0;
		}

		static int atmel_wm97xx_resume(struct device *dev)
		{
		struct platform_device *pdev = to_platform_device(dev);
		struct atmel_wm97xx *atmel_wm97xx = platform_get_drvdata(pdev);
		struct wm97xx *wm = atmel_wm97xx->wm;

		if (wm->input_dev->users) {
		enable_irq(atmel_wm97xx->gpio_irq);
		ac97c_writel(atmel_wm97xx, IER, AC97C_INT_CBEVT);
		}

		return 0;
		}
		#endif

		static SIMPLE_DEV_PM_OPS(atmel_wm97xx_pm_ops,
		atmel_wm97xx_suspend, atmel_wm97xx_resume);

		static struct platform_driver atmel_wm97xx_driver = {
		.remove = __exit_p(atmel_wm97xx_remove),
		.driver = {
		.name = "wm97xx-touch",
		.pm = &atmel_wm97xx_pm_ops,
		},
		};

		module_platform_driver_probe(atmel_wm97xx_driver, atmel_wm97xx_probe);

		MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
		MODULE_DESCRIPTION("wm97xx continuous touch driver for Atmel AT91 and AVR32");
		MODULE_LICENSE("GPL");

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