diff options
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/Kconfig | 32 | ||||
| -rw-r--r-- | drivers/input/touchscreen/Makefile | 3 | ||||
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 23 | ||||
| -rw-r--r-- | drivers/input/touchscreen/atmel-wm97xx.c | 446 | ||||
| -rw-r--r-- | drivers/input/touchscreen/eeti_ts.c | 286 | ||||
| -rw-r--r-- | drivers/input/touchscreen/tsc2007.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/w90p910_ts.c | 350 |
7 files changed, 1137 insertions, 5 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index b01fd61dadcc..72e2712c7e2a 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -111,6 +111,15 @@ config TOUCHSCREEN_DA9034 Say Y here to enable the support for the touchscreen found on Dialog Semiconductor DA9034 PMIC. +config TOUCHSCREEN_EETI + tristate "EETI touchscreen panel support" + depends on I2C + help + Say Y here to enable support for I2C connected EETI touch panels. + + To compile this driver as a module, choose M here: the + module will be called eeti_ts. + config TOUCHSCREEN_FUJITSU tristate "Fujitsu serial touchscreen" select SERIO @@ -341,6 +350,21 @@ 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 || ARCH_AT91) + 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 accelerated touch" depends on TOUCHSCREEN_WM97XX && ARCH_PXA @@ -466,4 +490,12 @@ config TOUCHSCREEN_TSC2007 To compile this driver as a module, choose M here: the module will be called tsc2007. +config TOUCHSCREEN_W90X900 + tristate "W90P910 touchscreen driver" + help + Say Y here if you have a W90P910 based touchscreen. + + To compile this driver as a module, choose M here: the + module will be called w90p910_ts. + endif diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 6700f7b9d165..3e1c5e0b952f 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o +obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o @@ -35,5 +36,7 @@ obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o wm97xx-ts-$(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 diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 2b01e56568f8..ba9d38c3f412 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -83,6 +83,7 @@ struct ads7846_packet { struct ads7846 { struct input_dev *input; char phys[32]; + char name[32]; struct spi_device *spi; @@ -97,6 +98,8 @@ struct ads7846 { u16 x_plate_ohms; u16 pressure_max; + bool swap_xy; + struct ads7846_packet *packet; struct spi_transfer xfer[18]; @@ -599,6 +602,10 @@ static void ads7846_rx(void *ads) dev_dbg(&ts->spi->dev, "DOWN\n"); #endif } + + if (ts->swap_xy) + swap(x, y); + input_report_abs(input, ABS_X, x); input_report_abs(input, ABS_Y, y); input_report_abs(input, ABS_PRESSURE, Rt); @@ -917,6 +924,7 @@ static int __devinit ads7846_probe(struct spi_device *spi) ts->spi = spi; ts->input = input_dev; ts->vref_mv = pdata->vref_mv; + ts->swap_xy = pdata->swap_xy; hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); ts->timer.function = ads7846_timer; @@ -958,8 +966,9 @@ static int __devinit ads7846_probe(struct spi_device *spi) ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync; snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev)); + snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model); - input_dev->name = "ADS784x Touchscreen"; + input_dev->name = ts->name; input_dev->phys = ts->phys; input_dev->dev.parent = &spi->dev; @@ -1141,9 +1150,15 @@ static int __devinit ads7846_probe(struct spi_device *spi) if (request_irq(spi->irq, ads7846_irq, IRQF_TRIGGER_FALLING, spi->dev.driver->name, ts)) { - dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq); - err = -EBUSY; - goto err_free_gpio; + dev_info(&spi->dev, + "trying pin change workaround on irq %d\n", spi->irq); + err = request_irq(spi->irq, ads7846_irq, + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, + spi->dev.driver->name, ts); + if (err) { + dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq); + goto err_free_gpio; + } } err = ads784x_hwmon_register(spi, ts); diff --git a/drivers/input/touchscreen/atmel-wm97xx.c b/drivers/input/touchscreen/atmel-wm97xx.c new file mode 100644 index 000000000000..35377f583e28 --- /dev/null +++ b/drivers/input/touchscreen/atmel-wm97xx.c @@ -0,0 +1,446 @@ +/* + * 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> + +#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 Unkown 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_ADCSRC_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(unsigned long data) +{ + atmel_wm97xx_acc_pen_up((struct wm97xx *)data); +} + +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) { + dev_dbg(&pdev->dev, "out of memory\n"); + 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); + + setup_timer(&atmel_wm97xx->pen_timer, atmel_wm97xx_pen_timer, + (unsigned long)wm); + + 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: + platform_set_drvdata(pdev, NULL); + 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); + platform_set_drvdata(pdev, NULL); + kfree(atmel_wm97xx); + + return 0; +} + +#ifdef CONFIG_PM +static int atmel_wm97xx_suspend(struct platform_device *pdev, pm_message_t msg) +{ + 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 platform_device *pdev) +{ + 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; +} +#else +#define atmel_wm97xx_suspend NULL +#define atmel_wm97xx_resume NULL +#endif + +static struct platform_driver atmel_wm97xx_driver = { + .remove = __exit_p(atmel_wm97xx_remove), + .driver = { + .name = "wm97xx-touch", + }, + .suspend = atmel_wm97xx_suspend, + .resume = atmel_wm97xx_resume, +}; + +static int __init atmel_wm97xx_init(void) +{ + return platform_driver_probe(&atmel_wm97xx_driver, atmel_wm97xx_probe); +} +module_init(atmel_wm97xx_init); + +static void __exit atmel_wm97xx_exit(void) +{ + platform_driver_unregister(&atmel_wm97xx_driver); +} +module_exit(atmel_wm97xx_exit); + +MODULE_AUTHOR("Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>"); +MODULE_DESCRIPTION("wm97xx continuous touch driver for Atmel AT91 and AVR32"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/touchscreen/eeti_ts.c b/drivers/input/touchscreen/eeti_ts.c new file mode 100644 index 000000000000..3ab92222a525 --- /dev/null +++ b/drivers/input/touchscreen/eeti_ts.c @@ -0,0 +1,286 @@ +/* + * Touch Screen driver for EETI's I2C connected touch screen panels + * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> + * + * See EETI's software guide for the protocol specification: + * http://home.eeti.com.tw/web20/eg/guide.htm + * + * Based on migor_ts.c + * Copyright (c) 2008 Magnus Damm + * Copyright (c) 2007 Ujjwal Pande <ujjwal@kenati.com> + * + * This file is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This file is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/timer.h> +#include <linux/gpio.h> + +static int flip_x; +module_param(flip_x, bool, 0644); +MODULE_PARM_DESC(flip_x, "flip x coordinate"); + +static int flip_y; +module_param(flip_y, bool, 0644); +MODULE_PARM_DESC(flip_y, "flip y coordinate"); + +struct eeti_ts_priv { + struct i2c_client *client; + struct input_dev *input; + struct work_struct work; + struct mutex mutex; + int irq; +}; + +#define EETI_TS_BITDEPTH (11) +#define EETI_MAXVAL ((1 << (EETI_TS_BITDEPTH + 1)) - 1) + +#define REPORT_BIT_PRESSED (1 << 0) +#define REPORT_BIT_AD0 (1 << 1) +#define REPORT_BIT_AD1 (1 << 2) +#define REPORT_BIT_HAS_PRESSURE (1 << 6) +#define REPORT_RES_BITS(v) (((v) >> 1) + EETI_TS_BITDEPTH) + +static void eeti_ts_read(struct work_struct *work) +{ + char buf[6]; + unsigned int x, y, res, pressed, to = 100; + struct eeti_ts_priv *priv = + container_of(work, struct eeti_ts_priv, work); + + mutex_lock(&priv->mutex); + + while (!gpio_get_value(irq_to_gpio(priv->irq)) && --to) + i2c_master_recv(priv->client, buf, sizeof(buf)); + + if (!to) { + dev_err(&priv->client->dev, + "unable to clear IRQ - line stuck?\n"); + goto out; + } + + /* drop non-report packets */ + if (!(buf[0] & 0x80)) + goto out; + + pressed = buf[0] & REPORT_BIT_PRESSED; + res = REPORT_RES_BITS(buf[0] & (REPORT_BIT_AD0 | REPORT_BIT_AD1)); + x = buf[2] | (buf[1] << 8); + y = buf[4] | (buf[3] << 8); + + /* fix the range to 11 bits */ + x >>= res - EETI_TS_BITDEPTH; + y >>= res - EETI_TS_BITDEPTH; + + if (flip_x) + x = EETI_MAXVAL - x; + + if (flip_y) + y = EETI_MAXVAL - y; + + if (buf[0] & REPORT_BIT_HAS_PRESSURE) + input_report_abs(priv->input, ABS_PRESSURE, buf[5]); + + input_report_abs(priv->input, ABS_X, x); + input_report_abs(priv->input, ABS_Y, y); + input_report_key(priv->input, BTN_TOUCH, !!pressed); + input_sync(priv->input); + +out: + mutex_unlock(&priv->mutex); +} + +static irqreturn_t eeti_ts_isr(int irq, void *dev_id) +{ + struct eeti_ts_priv *priv = dev_id; + + /* postpone I2C transactions as we are atomic */ + schedule_work(&priv->work); + + return IRQ_HANDLED; +} + +static int eeti_ts_open(struct input_dev *dev) +{ + struct eeti_ts_priv *priv = input_get_drvdata(dev); + + enable_irq(priv->irq); + + /* Read the events once to arm the IRQ */ + eeti_ts_read(&priv->work); + + return 0; +} + +static void eeti_ts_close(struct input_dev *dev) +{ + struct eeti_ts_priv *priv = input_get_drvdata(dev); + + disable_irq(priv->irq); + cancel_work_sync(&priv->work); +} + +static int __devinit eeti_ts_probe(struct i2c_client *client, + const struct i2c_device_id *idp) +{ + struct eeti_ts_priv *priv; + struct input_dev *input; + int err = -ENOMEM; + + /* In contrast to what's described in the datasheet, there seems + * to be no way of probing the presence of that device using I2C + * commands. So we need to blindly believe it is there, and wait + * for interrupts to occur. */ + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) { + dev_err(&client->dev, "failed to allocate driver data\n"); + goto err0; + } + + mutex_init(&priv->mutex); + input = input_allocate_device(); + + if (!input) { + dev_err(&client->dev, "Failed to allocate input device.\n"); + goto err1; + } + + input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + + input_set_abs_params(input, ABS_X, 0, EETI_MAXVAL, 0, 0); + input_set_abs_params(input, ABS_Y, 0, EETI_MAXVAL, 0, 0); + input_set_abs_params(input, ABS_PRESSURE, 0, 0xff, 0, 0); + + input->name = client->name; + input->id.bustype = BUS_I2C; + input->dev.parent = &client->dev; + input->open = eeti_ts_open; + input->close = eeti_ts_close; + + priv->client = client; + priv->input = input; + priv->irq = client->irq; + + INIT_WORK(&priv->work, eeti_ts_read); + i2c_set_clientdata(client, priv); + input_set_drvdata(input, priv); + + err = input_register_device(input); + if (err) + goto err1; + + err = request_irq(priv->irq, eeti_ts_isr, IRQF_TRIGGER_FALLING, + client->name, priv); + if (err) { + dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); + goto err2; + } + + /* Disable the irq for now. It will be enabled once the input device + * is opened. */ + disable_irq(priv->irq); + + device_init_wakeup(&client->dev, 0); + return 0; + +err2: + input_unregister_device(input); + input = NULL; /* so we dont try to free it below */ +err1: + input_free_device(input); + i2c_set_clientdata(client, NULL); + kfree(priv); +err0: + return err; +} + +static int __devexit eeti_ts_remove(struct i2c_client *client) +{ + struct eeti_ts_priv *priv = i2c_get_clientdata(client); + + free_irq(priv->irq, priv); + input_unregister_device(priv->input); + i2c_set_clientdata(client, NULL); + kfree(priv); + + return 0; +} + +#ifdef CONFIG_PM +static int eeti_ts_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct eeti_ts_priv *priv = i2c_get_clientdata(client); + + if (device_may_wakeup(&client->dev)) + enable_irq_wake(priv->irq); + + return 0; +} + +static int eeti_ts_resume(struct i2c_client *client) +{ + struct eeti_ts_priv *priv = i2c_get_clientdata(client); + + if (device_may_wakeup(&client->dev)) + disable_irq_wake(priv->irq); + + return 0; +} +#else +#define eeti_ts_suspend NULL +#define eeti_ts_resume NULL +#endif + +static const struct i2c_device_id eeti_ts_id[] = { + { "eeti_ts", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, eeti_ts_id); + +static struct i2c_driver eeti_ts_driver = { + .driver = { + .name = "eeti_ts", + }, + .probe = eeti_ts_probe, + .remove = __devexit_p(eeti_ts_remove), + .suspend = eeti_ts_suspend, + .resume = eeti_ts_resume, + .id_table = eeti_ts_id, +}; + +static int __init eeti_ts_init(void) +{ + return i2c_add_driver(&eeti_ts_driver); +} + +static void __exit eeti_ts_exit(void) +{ + i2c_del_driver(&eeti_ts_driver); +} + +MODULE_DESCRIPTION("EETI Touchscreen driver"); +MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>"); +MODULE_LICENSE("GPL"); + +module_init(eeti_ts_init); +module_exit(eeti_ts_exit); + diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c index 948e167557f1..880f58c6a7c4 100644 --- a/drivers/input/touchscreen/tsc2007.c +++ b/drivers/input/touchscreen/tsc2007.c @@ -257,7 +257,7 @@ static int tsc2007_probe(struct i2c_client *client, struct input_dev *input_dev; int err; - if (!pdata) { + if (!pdata || !pdata->get_pendown_state) { dev_err(&client->dev, "platform data is required!\n"); return -EINVAL; } diff --git a/drivers/input/touchscreen/w90p910_ts.c b/drivers/input/touchscreen/w90p910_ts.c new file mode 100644 index 000000000000..6071f5882572 --- /dev/null +++ b/drivers/input/touchscreen/w90p910_ts.c @@ -0,0 +1,350 @@ +/* + * Copyright (c) 2008 Nuvoton technology corporation. + * + * Wan ZongShun <mcuos.com@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation;version 2 of the License. + * + */ + +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/input.h> +#include <linux/interrupt.h> + +/* ADC controller bit defines */ +#define ADC_DELAY 0xf00 +#define ADC_DOWN 0x01 +#define ADC_TSC_Y (0x01 << 8) +#define ADC_TSC_X (0x00 << 8) +#define TSC_FOURWIRE (~(0x03 << 1)) +#define ADC_CLK_EN (0x01 << 28) /* ADC clock enable */ +#define ADC_READ_CON (0x01 << 12) +#define ADC_CONV (0x01 << 13) +#define ADC_SEMIAUTO (0x01 << 14) +#define ADC_WAITTRIG (0x03 << 14) +#define ADC_RST1 (0x01 << 16) +#define ADC_RST0 (0x00 << 16) +#define ADC_EN (0x01 << 17) +#define ADC_INT (0x01 << 18) +#define WT_INT (0x01 << 20) +#define ADC_INT_EN (0x01 << 21) +#define LVD_INT_EN (0x01 << 22) +#define WT_INT_EN (0x01 << 23) +#define ADC_DIV (0x04 << 1) /* div = 6 */ + +enum ts_state { + TS_WAIT_NEW_PACKET, /* We are waiting next touch report */ + TS_WAIT_X_COORD, /* We are waiting for ADC to report X coord */ + TS_WAIT_Y_COORD, /* We are waiting for ADC to report Y coord */ + TS_IDLE, /* Input device is closed, don't do anything */ +}; + +struct w90p910_ts { + struct input_dev *input; + struct timer_list timer; + int irq_num; + void __iomem *clocken; + void __iomem *ts_reg; + spinlock_t lock; + enum ts_state state; +}; + +static void w90p910_report_event(struct w90p910_ts *w90p910_ts, bool down) +{ + struct input_dev *dev = w90p910_ts->input; + + if (down) { + input_report_abs(dev, ABS_X, + __raw_readl(w90p910_ts->ts_reg + 0x0c)); + input_report_abs(dev, ABS_Y, + __raw_readl(w90p910_ts->ts_reg + 0x10)); + } + + input_report_key(dev, BTN_TOUCH, down); + input_sync(dev); +} + +static void w90p910_prepare_x_reading(struct w90p910_ts *w90p910_ts) +{ + unsigned long ctlreg; + + __raw_writel(ADC_TSC_X, w90p910_ts->ts_reg + 0x04); + ctlreg = __raw_readl(w90p910_ts->ts_reg); + ctlreg &= ~(ADC_WAITTRIG | WT_INT | WT_INT_EN); + ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV; + __raw_writel(ctlreg, w90p910_ts->ts_reg); + + w90p910_ts->state = TS_WAIT_X_COORD; +} + +static void w90p910_prepare_y_reading(struct w90p910_ts *w90p910_ts) +{ + unsigned long ctlreg; + + __raw_writel(ADC_TSC_Y, w90p910_ts->ts_reg + 0x04); + ctlreg = __raw_readl(w90p910_ts->ts_reg); + ctlreg &= ~(ADC_WAITTRIG | ADC_INT | WT_INT_EN); + ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV; + __raw_writel(ctlreg, w90p910_ts->ts_reg); + + w90p910_ts->state = TS_WAIT_Y_COORD; +} + +static void w90p910_prepare_next_packet(struct w90p910_ts *w90p910_ts) +{ + unsigned long ctlreg; + + ctlreg = __raw_readl(w90p910_ts->ts_reg); + ctlreg &= ~(ADC_INT | ADC_INT_EN | ADC_SEMIAUTO | ADC_CONV); + ctlreg |= ADC_WAITTRIG | WT_INT_EN; + __raw_writel(ctlreg, w90p910_ts->ts_reg); + + w90p910_ts->state = TS_WAIT_NEW_PACKET; +} + +static irqreturn_t w90p910_ts_interrupt(int irq, void *dev_id) +{ + struct w90p910_ts *w90p910_ts = dev_id; + unsigned long flags; + + spin_lock_irqsave(&w90p910_ts->lock, flags); + + switch (w90p910_ts->state) { + case TS_WAIT_NEW_PACKET: + /* + * The controller only generates interrupts when pen + * is down. + */ + del_timer(&w90p910_ts->timer); + w90p910_prepare_x_reading(w90p910_ts); + break; + + + case TS_WAIT_X_COORD: + w90p910_prepare_y_reading(w90p910_ts); + break; + + case TS_WAIT_Y_COORD: + w90p910_report_event(w90p910_ts, true); + w90p910_prepare_next_packet(w90p910_ts); + mod_timer(&w90p910_ts->timer, jiffies + msecs_to_jiffies(100)); + break; + + case TS_IDLE: + break; + } + + spin_unlock_irqrestore(&w90p910_ts->lock, flags); + + return IRQ_HANDLED; +} + +static void w90p910_check_pen_up(unsigned long data) +{ + struct w90p910_ts *w90p910_ts = (struct w90p910_ts *) data; + unsigned long flags; + + spin_lock_irqsave(&w90p910_ts->lock, flags); + + if (w90p910_ts->state == TS_WAIT_NEW_PACKET && + !(__raw_readl(w90p910_ts->ts_reg + 0x04) & ADC_DOWN)) { + + w90p910_report_event(w90p910_ts, false); + } + + spin_unlock_irqrestore(&w90p910_ts->lock, flags); +} + +static int w90p910_open(struct input_dev *dev) +{ + struct w90p910_ts *w90p910_ts = input_get_drvdata(dev); + unsigned long val; + + /* enable the ADC clock */ + val = __raw_readl(w90p910_ts->clocken); + __raw_writel(val | ADC_CLK_EN, w90p910_ts->clocken); + + __raw_writel(ADC_RST1, w90p910_ts->ts_reg); + msleep(1); + __raw_writel(ADC_RST0, w90p910_ts->ts_reg); + msleep(1); + + /* set delay and screen type */ + val = __raw_readl(w90p910_ts->ts_reg + 0x04); + __raw_writel(val & TSC_FOURWIRE, w90p910_ts->ts_reg + 0x04); + __raw_writel(ADC_DELAY, w90p910_ts->ts_reg + 0x08); + + w90p910_ts->state = TS_WAIT_NEW_PACKET; + wmb(); + + /* set trigger mode */ + val = __raw_readl(w90p910_ts->ts_reg); + val |= ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN; + __raw_writel(val, w90p910_ts->ts_reg); + + return 0; +} + +static void w90p910_close(struct input_dev *dev) +{ + struct w90p910_ts *w90p910_ts = input_get_drvdata(dev); + unsigned long val; + + /* disable trigger mode */ + + spin_lock_irq(&w90p910_ts->lock); + + w90p910_ts->state = TS_IDLE; + + val = __raw_readl(w90p910_ts->ts_reg); + val &= ~(ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN | ADC_INT_EN); + __raw_writel(val, w90p910_ts->ts_reg); + + spin_unlock_irq(&w90p910_ts->lock); + + /* Now that interrupts are shut off we can safely delete timer */ + del_timer_sync(&w90p910_ts->timer); + + /* stop the ADC clock */ + val = __raw_readl(w90p910_ts->clocken); + __raw_writel(val & ~ADC_CLK_EN, w90p910_ts->clocken); +} + +static int __devinit w90x900ts_probe(struct platform_device *pdev) +{ + struct w90p910_ts *w90p910_ts; + struct input_dev *input_dev; + struct resource *res; + int err; + + w90p910_ts = kzalloc(sizeof(struct w90p910_ts), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!w90p910_ts || !input_dev) { + err = -ENOMEM; + goto fail1; + } + + w90p910_ts->input = input_dev; + w90p910_ts->state = TS_IDLE; + spin_lock_init(&w90p910_ts->lock); + setup_timer(&w90p910_ts->timer, w90p910_check_pen_up, + (unsigned long)&w90p910_ts); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + err = -ENXIO; + goto fail1; + } + + if (!request_mem_region(res->start, res->end - res->start + 1, + pdev->name)) { + err = -EBUSY; + goto fail1; + } + + w90p910_ts->ts_reg = ioremap(res->start, res->end - res->start + 1); + if (!w90p910_ts->ts_reg) { + err = -ENOMEM; + goto fail2; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) { + err = -ENXIO; + goto fail3; + } + + w90p910_ts->clocken = (void __iomem *)res->start; + + input_dev->name = "W90P910 TouchScreen"; + input_dev->phys = "w90p910ts/event0"; + input_dev->id.bustype = BUS_HOST; + input_dev->id.vendor = 0x0005; + input_dev->id.product = 0x0001; + input_dev->id.version = 0x0100; + input_dev->dev.parent = &pdev->dev; + input_dev->open = w90p910_open; + input_dev->close = w90p910_close; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + + input_set_abs_params(input_dev, ABS_X, 0, 0x400, 0, 0); + input_set_abs_params(input_dev, ABS_Y, 0, 0x400, 0, 0); + + input_set_drvdata(input_dev, w90p910_ts); + + w90p910_ts->irq_num = platform_get_irq(pdev, 0); + if (request_irq(w90p910_ts->irq_num, w90p910_ts_interrupt, + IRQF_DISABLED, "w90p910ts", w90p910_ts)) { + err = -EBUSY; + goto fail3; + } + + err = input_register_device(w90p910_ts->input); + if (err) + goto fail4; + + platform_set_drvdata(pdev, w90p910_ts); + + return 0; + +fail4: free_irq(w90p910_ts->irq_num, w90p910_ts); +fail3: iounmap(w90p910_ts->ts_reg); +fail2: release_mem_region(res->start, res->end - res->start + 1); +fail1: input_free_device(input_dev); + kfree(w90p910_ts); + return err; +} + +static int __devexit w90x900ts_remove(struct platform_device *pdev) +{ + struct w90p910_ts *w90p910_ts = platform_get_drvdata(pdev); + struct resource *res; + + free_irq(w90p910_ts->irq_num, w90p910_ts); + del_timer_sync(&w90p910_ts->timer); + iounmap(w90p910_ts->ts_reg); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, res->end - res->start + 1); + + input_unregister_device(w90p910_ts->input); + kfree(w90p910_ts); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver w90x900ts_driver = { + .probe = w90x900ts_probe, + .remove = __devexit_p(w90x900ts_remove), + .driver = { + .name = "w90x900-ts", + .owner = THIS_MODULE, + }, +}; + +static int __init w90x900ts_init(void) +{ + return platform_driver_register(&w90x900ts_driver); +} + +static void __exit w90x900ts_exit(void) +{ + platform_driver_unregister(&w90x900ts_driver); +} + +module_init(w90x900ts_init); +module_exit(w90x900ts_exit); + +MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>"); +MODULE_DESCRIPTION("w90p910 touch screen driver!"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:w90p910-ts"); |