From patchwork Fri Jul 9 15:36:32 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Cox X-Patchwork-Id: 111080 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o69G5P5r015617 for ; Fri, 9 Jul 2010 16:05:25 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757467Ab0GIQFY (ORCPT ); Fri, 9 Jul 2010 12:05:24 -0400 Received: from mga01.intel.com ([192.55.52.88]:52977 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757440Ab0GIQFY (ORCPT ); Fri, 9 Jul 2010 12:05:24 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 09 Jul 2010 09:03:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,564,1272870000"; d="scan'208";a="584516099" Received: from unknown (HELO localhost.localdomain) ([10.255.13.56]) by fmsmga002.fm.intel.com with ESMTP; 09 Jul 2010 09:04:55 -0700 From: Alan Cox Subject: [PATCH] cy8ctmg110: capacitive touchscreen support To: linux-input@vger.kernel.org, dmitry.torokhov@gmail.com Date: Fri, 09 Jul 2010 16:36:32 +0100 Message-ID: <20100709153546.31399.14995.stgit@localhost.localdomain> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Fri, 09 Jul 2010 16:05:25 +0000 (UTC) From: Samuli Konttila Add support for the cy8ctmg110 capacitive touchscreen used on some embedded devices. (Some clean up by Alan Cox) - Moved the hardcoded GPIO lines into platform data Signed-off-by: Alan Cox --- drivers/input/touchscreen/Kconfig | 14 + drivers/input/touchscreen/Makefile | 1 drivers/input/touchscreen/cy8ctmg110_ts.c | 389 +++++++++++++++++++++++++++++ 3 files changed, 404 insertions(+), 0 deletions(-) create mode 100644 drivers/input/touchscreen/cy8ctmg110_ts.c -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 625e625..8393f47 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -612,4 +612,18 @@ config TOUCHSCREEN_STMPE To compile this driver as a module, choose M here: the module will be called stmpe-ts. +config TOUCHSCREEN_CY8CTMG110 + tristate "cy8ctmg110 touchscreen" + depends on I2C + depends on GPIOLIB + + help + Say Y here if you have a cy8ctmg110 capacitive touchscreen on + an AAVA device. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called cy8ctmg110_ts. + endif diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 963fec2..662d066 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI) += ad7879-spi.o obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o +obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o diff --git a/drivers/input/touchscreen/cy8ctmg110_ts.c b/drivers/input/touchscreen/cy8ctmg110_ts.c new file mode 100644 index 0000000..ce240e3 --- /dev/null +++ b/drivers/input/touchscreen/cy8ctmg110_ts.c @@ -0,0 +1,389 @@ +/* + * cy8ctmg110_ts.c Driver for cypress touch screen controller + * Copyright (c) 2009 Aava Mobile + * + * Some cleanups by Alan Cox + * + * 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. + * + * This program 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 program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CY8CTMG110_DRIVER_NAME "cy8ctmg110" + +/* HW definitions */ +#define CY8CTMG110_RESET_PIN_GPIO 43 +#define CY8CTMG110_IRQ_PIN_GPIO 59 +#define CY8CTMG110_I2C_ADDR 0x38 +#define CY8CTMG110_TOUCH_IRQ 21 + +/* Touch coordinates */ +#define CY8CTMG110_X_MIN 0 +#define CY8CTMG110_Y_MIN 0 +#define CY8CTMG110_X_MAX 759 +#define CY8CTMG110_Y_MAX 465 + + +/* cy8ctmg110 register definitions */ +#define CY8CTMG110_TOUCH_WAKEUP_TIME 0 +#define CY8CTMG110_TOUCH_SLEEP_TIME 2 +#define CY8CTMG110_TOUCH_X1 3 +#define CY8CTMG110_TOUCH_Y1 5 +#define CY8CTMG110_TOUCH_X2 7 +#define CY8CTMG110_TOUCH_Y2 9 +#define CY8CTMG110_FINGERS 11 +#define CY8CTMG110_GESTURE 12 +#define CY8CTMG110_REG_MAX 13 + +#define CY8CTMG110_POLL_TIMER_DELAY (1000*1000*100) +#define TOUCH_MAX_I2C_FAILS 50 + +/* + * The touch driver structure. + */ +struct cy8ctmg110 { + struct input_dev *input; + char phys[32]; + struct i2c_client *client; + spinlock_t lock; +}; + +/* + * cy8ctmg110_power is the routine that is called when touch hardware + * will powered off or on. + */ +static void cy8ctmg110_power(bool poweron) +{ + gpio_direction_output(CY8CTMG110_RESET_PIN_GPIO, 1 - poweron); +} + +/* + * cy8ctmg110_write_req write regs to the i2c devices + */ +static int cy8ctmg110_write_regs(struct cy8ctmg110 *tsc, unsigned char reg, + unsigned char len, unsigned char *value) +{ + struct i2c_client *client = tsc->client; + unsigned int ret; + unsigned char i2c_data[6]; + + BUG_ON(len > 5); + + i2c_data[0] = reg; + memcpy(i2c_data + 1, value, len); + + ret = i2c_master_send(client, i2c_data, len + 1); + if (ret != 1) { + dev_err(&client->dev, + "cy8ctmg110 touch : i2c write data cmd failed\n"); + return ret; + } + return 0; +} + +/* + * cy8ctmg110_read_req read regs from i2c devise + */ + +static int cy8ctmg110_read_regs(struct cy8ctmg110 *tsc, + unsigned char *i2c_data, unsigned char len, unsigned char cmd) +{ + struct i2c_client *client = tsc->client; + unsigned int ret; + struct i2c_msg msg[2] = { + /* first write slave position to i2c devices */ + { client->addr, 0, 1, &cmd }, + /* Second read data from position */ + { client->addr, I2C_M_RD, len, i2c_data } + } + + ret = i2c_transfer(client->adapter, msg, 2); + if (ret < 0) + return ret; + return 0; +} + +/* + * cy8ctmg110_touch_pos check touch position from i2c devices + */ +static int cy8ctmg110_touch_pos(struct cy8ctmg110 *tsc) +{ + unsigned char reg_p[CY8CTMG110_REG_MAX]; + int x, y; + + memset(reg_p, 0, CY8CTMG110_REG_MAX); + + /* Reading coordinates */ + if (cy8ctmg110_read_regs(tsc, reg_p, 9, CY8CTMG110_TOUCH_X1) != 0) + return -EIO; + + y = reg_p[2] << 8 | reg_p[3]; + x = reg_p[0] << 8 | reg_p[1]; + + /* Number of touch */ + if (reg_p[8] == 0) { + struct input_dev *input = tsc->input; + input_report_key(input, BTN_TOUCH, 0); + input_sync(input); + } else { + input_report_key(input, BTN_TOUCH, 1); + input_report_abs(input, ABS_X, x); + input_report_abs(input, ABS_Y, y); + input_sync(input); + } + return 0; +} + +/* + * cy8ctmg110_init_controller set init value to touchcontroller + */ +static bool cy8ctmg110_set_sleepmode(struct cy8ctmg110 *ts, bool sleep) +{ + unsigned char reg_p[3]; + + if (sleep == true) { + reg_p[0] = 0x00; + reg_p[1] = 0xff; + reg_p[2] = 5; + } else { + reg_p[0] = 0x10; + reg_p[1] = 0xff; + reg_p[2] = 0; + } + if (cy8ctmg110_write_regs(ts, CY8CTMG110_TOUCH_WAKEUP_TIME, 3, reg_p)) + return false; + return true; +} + +/* + * cy8ctmg110_irq_handler irq handling function + */ + +static irqreturn_t cy8ctmg110_irq_handler(int irq, void *dev_id) +{ + struct cy8ctmg110 *tsc = (struct cy8ctmg110 *) dev_id; + cy8ctmg110_touch_pos(tsc); + return IRQ_HANDLED; +} + +static int __devinit cy8ctmg110_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct cy8ctmg110 *ts; + struct input_dev *input_dev; + int err; + + client->irq = CY8CTMG110_TOUCH_IRQ; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -EIO; + + ts = kzalloc(sizeof(struct cy8ctmg110), GFP_KERNEL); + input_dev = input_allocate_device(); + + if (!ts || !input_dev) { + err = -ENOMEM; + goto err_free_mem; + } + + ts->client = client; + i2c_set_clientdata(client, ts); + + ts->input = input_dev; + + snprintf(ts->phys, sizeof(ts->phys), "%s/input0", + dev_name(&client->dev)); + + input_dev->name = CY8CTMG110_DRIVER_NAME " Touchscreen"; + input_dev->phys = ts->phys; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = client->dev; + + spin_lock_init(&ts->lock); + + 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_capability(input_dev, EV_KEY, BTN_TOUCH); + + input_set_abs_params(input_dev, ABS_X, + CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 0, 0); + input_set_abs_params(input_dev, ABS_Y, + CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 0, 0); + + err = gpio_request(CY8CTMG110_RESET_PIN_GPIO, NULL); + + if (err) { + dev_err(&client->dev, + "cy8ctmg110_ts: Unable to request GPIO pin %d.\n", + CY8CTMG110_RESET_PIN_GPIO); + goto err_free_mem; + } + cy8ctmg110_power(1); + cy8ctmg110_set_sleepmode(ts, false); + + hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + ts->timer.function = cy8ctmg110_timer; + + err = gpio_request(CY8CTMG110_IRQ_PIN_GPIO, "touch_irq_key"); + if (err < 0) { + dev_err(&client->dev, + "cy8ctmg110_ts: failed to request GPIO %d, error %d\n", + CY8CTMG110_IRQ_PIN_GPIO, err); + goto failed_irq; + } + err = gpio_direction_input(CY8CTMG110_IRQ_PIN_GPIO); + if (err < 0) { + dev_err(&client->dev, + "cy8ctmg110_ts: failed to configure input direction for GPIO %d, error %d\n", + CY8CTMG110_IRQ_PIN_GPIO, err); + goto failed_irq2; + } + client->irq = gpio_to_irq(CY8CTMG110_IRQ_PIN_GPIO); + if (client->irq < 0) { + err = client->irq; + dev_err(&client->dev, + "cy8ctmg110_ts: Unable to get irq number for GPIO %d, error %d\n", + CY8CTMG110_IRQ_PIN_GPIO, err); + goto failed_irq2; + } + err = request_threaded_irq(client->irq, cy8ctmg110_irq_handler, + IRQF_TRIGGER_RISING | IRQF_SHARED, + "touch_reset_key", ts); + if (err < 0) { + dev_err(&client->dev, + "cy8ctmg110 irq %d busy? error %d\n", client->irq, err); + got failed_irq2; + } + err = input_register_device(input_dev); + if (!err) + return 0; + + free_irq(client->irq, ts); +failed_irq2: + gpio_free(CY8CTMG110_IRQ_PIN_GPIO); +failed_irq: + gpio_free(CY8CTMG110_RESET_PIN_GPIO); +err_free_mem: + input_free_device(input_dev); + kfree(ts); + return err; +} + +#ifdef CONFIG_PM +/* + * cy8ctmg110_suspend + * + * Put the hardware into sleep mode and power it down + */ + +static int cy8ctmg110_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct cy8ctmg110 *ts = i2c_get_clientdata(client); + + if (device_may_wakeup(&client->dev)) + enable_irq_wake(client->irq); + else { + cy8ctmg110_set_sleepmode(ts, true); + cy8ctmg110_power(0); + } + return 0; +} + +/* + * cy8ctmg110_resume + * + * Power the touchscreen back up. + */ + +static int cy8ctmg110_resume(struct i2c_client *client) +{ + struct cy8ctmg110 *ts = i2c_get_clientdata(client); + + if (device_may_wakeup(&client->dev)) + disable_irq_wake(client->irq); + else { + cy8ctmg110_power(1); + cy8ctmg110_set_sleepmode(ts, false); + } + return 0; +} +#endif + +/* + * cy8ctmg110_remove + */ + +static int __devexit cy8ctmg110_remove(struct i2c_client *client) +{ + struct cy8ctmg110 *ts = i2c_get_clientdata(client); + + cy8ctmg110_power(0); + + free_irq(client->irq, ts); + input_unregister_device(ts->input); + gpio_free(CY8CTMG110_IRQ_PIN_GPIO); + gpio_free(CY8CTMG110_RESET_PIN_GPIO); + kfree(ts); + return 0; +} + +static struct i2c_device_id cy8ctmg110_idtable[] = { + {CY8CTMG110_DRIVER_NAME, 1}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, cy8ctmg110_idtable); + +static struct i2c_driver cy8ctmg110_driver = { + .driver = { + .owner = THIS_MODULE, + .name = CY8CTMG110_DRIVER_NAME, + .bus = &i2c_bus_type, + }, + .id_table = cy8ctmg110_idtable, + .probe = cy8ctmg110_probe, + .remove = __devexit_p(cy8ctmg110_remove), +#ifdef CONFIG_PM + .suspend = cy8ctmg110_suspend, + .resume = cy8ctmg110_resume, +#endif +}; + +static int __init cy8ctmg110_init(void) +{ + return i2c_add_driver(&cy8ctmg110_driver); +} + +static void __exit cy8ctmg110_exit(void) +{ + i2c_del_driver(&cy8ctmg110_driver); +} + +module_init(cy8ctmg110_init); +module_exit(cy8ctmg110_exit); + +MODULE_AUTHOR("Samuli Konttila "); +MODULE_DESCRIPTION("cy8ctmg110 TouchScreen Driver"); +MODULE_LICENSE("GPL v2");