This driver is for the QCI trackpad used on Quanta smartbooks Review URL: http://codereview.chromium.org/724001 Signed-off-by: Horace Fu <horace.fu@xxxxxxxxxxxx> Signed-off-by: Mandeep Singh Baines <msb@xxxxxxxxxxxx> [nleeder@xxxxxxxxxxxxxx: cleanup i2c calls, address review comments etc] Signed-off-by: Neil Leeder <nleeder@xxxxxxxxxxxxxx> --- drivers/input/mouse/Kconfig | 12 ++ drivers/input/mouse/Makefile | 1 + drivers/input/mouse/qci_touchpad.c | 313 ++++++++++++++++++++++++++++++++++++ include/linux/input/qci_touchpad.h | 25 +++ 4 files changed, 351 insertions(+), 0 deletions(-) create mode 100644 drivers/input/mouse/qci_touchpad.c create mode 100644 include/linux/input/qci_touchpad.h diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig index 3feeb3a..320db55 100644 --- a/drivers/input/mouse/Kconfig +++ b/drivers/input/mouse/Kconfig @@ -303,6 +303,18 @@ config MOUSE_MAPLE To compile this driver as a module choose M here: the module will be called maplemouse. +config MOUSE_QCITP + tristate "Quanta Computer Inc. Touchpad" + depends on I2C + help + This driver supports the touchpad on Quanta smartbook devices. + + Say Y here if you have a Quanta-based smartboot or notepad + device and want to use the Quanta touchpad driver. + + To compile this driver as a module, choose M here: the + module will be called qci_touchpad. + config MOUSE_SYNAPTICS_I2C tristate "Synaptics I2C Touchpad support" depends on I2C diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile index 570c84a..6eda35d 100644 --- a/drivers/input/mouse/Makefile +++ b/drivers/input/mouse/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_MOUSE_MAPLE) += maplemouse.o obj-$(CONFIG_MOUSE_PC110PAD) += pc110pad.o obj-$(CONFIG_MOUSE_PS2) += psmouse.o obj-$(CONFIG_MOUSE_PXA930_TRKBALL) += pxa930_trkball.o +obj-$(CONFIG_MOUSE_QCITP) += qci_touchpad.o obj-$(CONFIG_MOUSE_RISCPC) += rpcmouse.o obj-$(CONFIG_MOUSE_SERIAL) += sermouse.o obj-$(CONFIG_MOUSE_SYNAPTICS_I2C) += synaptics_i2c.o diff --git a/drivers/input/mouse/qci_touchpad.c b/drivers/input/mouse/qci_touchpad.c new file mode 100644 index 0000000..6865950 --- /dev/null +++ b/drivers/input/mouse/qci_touchpad.c @@ -0,0 +1,313 @@ +/* Quanta I2C Touchpad Driver + * + * Copyright (C) 2009 Quanta Computer Inc. + * Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * Author: Hsin Wu <hsin.wu@xxxxxxxxxxxx> + * Author: Austin Lai <austin.lai@xxxxxxxxxxxx> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +/* + * Driver communicates over i2c to nuvoTon WPCE775x Embedded Controller, + * which has touchpad attached through PS/2 interface. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/input/qci_touchpad.h> + +#define TOUCHPAD_ID_NAME "qci-i2cpad" +#define TOUCHPAD_NAME "QCI Touchpad" +#define TOUCHPAD_DEVICE "/qci_touchpad/input0" +#define TOUCHPAD_CMD_ENABLE 0xF4 +#define TOUCHPAD_READ_DATA_LEN 3 + +struct i2ctpad_drv_data { + struct i2c_client *ti2c_client; + struct input_dev *qcitp_dev; + unsigned int qcitp_gpio; + unsigned int qcitp_irq; + char ecdata[8]; + bool opened; +}; + +static int tp_sense_val = 10; + +static ssize_t tp_sensitive_show(struct kobject *kobj, + struct kobj_attribute *attr, char * buf) +{ + return sprintf(buf, "%d\n", tp_sense_val); +} + +static ssize_t tp_sensitive_store(struct kobject *kobj, + struct kobj_attribute *attr, const char* buf, size_t n) +{ + unsigned int val = 0; + sscanf(buf, "%d", &val); + + if (val >= 1 && val <= 10) + tp_sense_val = val; + else + return -ENOSYS; + + return n; +} + +static struct kobj_attribute tp_sensitivity = __ATTR(tp_sensitivity, + 0644, + tp_sensitive_show, + tp_sensitive_store); + +static struct attribute *g_tp[] = { + &tp_sensitivity.attr, + NULL, +}; + +static struct attribute_group attr_group = { + .attrs = g_tp, +}; + +#ifdef CONFIG_PM +static int qcitp_suspend(struct device *_dev) +{ + struct i2c_client *client = + container_of(_dev, struct i2c_client, dev); + struct i2ctpad_drv_data *context = i2c_get_clientdata(client); + + disable_irq(context->qcitp_irq); + return 0; +} + +static int qcitp_resume(struct device *_dev) +{ + struct i2c_client *client = + container_of(_dev, struct i2c_client, dev); + struct i2ctpad_drv_data *context = i2c_get_clientdata(client); + + enable_irq(context->qcitp_irq); + return 0; +} +#endif + +static const struct i2c_device_id qcitp_idtable[] = { + { TOUCHPAD_ID_NAME, 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, qcitp_idtable); + +#ifdef CONFIG_PM +static const struct dev_pm_ops qcitp_pm_ops = { + .suspend = qcitp_suspend, + .resume = qcitp_resume, +}; +#endif + +static void qcitp_report_key(struct input_dev *tpad_dev, char *ec_data) +{ + int dx = 0; + int dy = 0; + + if (ec_data[1]) + dx = (int) ec_data[1] - + (int) ((ec_data[0] << 4) & 0x100); + + if (ec_data[2]) + dy = (int) ((ec_data[0] << 3) & 0x100) - + (int) ec_data[2]; + + dx = (dx * tp_sense_val)/10; + dy = (dy * tp_sense_val)/10; + + input_report_key(tpad_dev, BTN_LEFT, ec_data[0] & 0x01); + input_report_key(tpad_dev, BTN_RIGHT, ec_data[0] & 0x02); + input_report_key(tpad_dev, BTN_MIDDLE, ec_data[0] & 0x04); + input_report_rel(tpad_dev, REL_X, dx); + input_report_rel(tpad_dev, REL_Y, dy); + input_sync(tpad_dev); +} + +static irqreturn_t qcitp_interrupt(int irq, void *dev_id) +{ + struct i2ctpad_drv_data *context = dev_id; + int rc; + + rc = i2c_master_recv(context->ti2c_client, context->ecdata, + TOUCHPAD_READ_DATA_LEN); + if (rc == TOUCHPAD_READ_DATA_LEN) + qcitp_report_key(context->qcitp_dev, context->ecdata); + + return IRQ_HANDLED; +} + +static int qcitp_open(struct input_dev *input) +{ + struct i2ctpad_drv_data *context = input_get_drvdata(input); + u8 buf[1]; + int err = 0; + + if (context->opened) + return 0; + context->opened = 1; + + buf[0] = TOUCHPAD_CMD_ENABLE; + err = i2c_master_send(context->ti2c_client, buf, 1); + if (err < 0) + goto i2c_fail; + msleep(100); + err = i2c_master_recv(context->ti2c_client, buf, 1); + +i2c_fail: + return err; +} + +static int __devinit qcitp_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int err; + struct i2ctpad_drv_data *context; + struct qci_touchpad_platform_data *pd; + int irq_trigger_type; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + pr_err("[QCI TouchPad] i2c functionality failed\n"); + return -ENODEV; + } + + context = kzalloc(sizeof(struct i2ctpad_drv_data), GFP_KERNEL); + if (!context) + return -ENOMEM; + i2c_set_clientdata(client, context); + context->ti2c_client = client; + context->qcitp_gpio = client->irq; + + pd = client->dev.platform_data; + if (pd) + irq_trigger_type = pd->irq_trigger_type; + else + irq_trigger_type = IRQF_TRIGGER_FALLING; + + context->qcitp_dev = input_allocate_device(); + if (!context->qcitp_dev) { + pr_err("[QCI TouchPad] allocating memory failed\n"); + err = -ENOMEM; + goto allocate_fail; + } + context->qcitp_dev->name = TOUCHPAD_NAME; + context->qcitp_dev->phys = TOUCHPAD_DEVICE; + context->qcitp_dev->id.bustype = BUS_I2C; + context->qcitp_dev->id.vendor = 0x1050; + context->qcitp_dev->id.product = 0x1; + context->qcitp_dev->id.version = 0x1; + context->qcitp_dev->evbit[0] = BIT_MASK(EV_KEY) | + BIT_MASK(EV_REL); + context->qcitp_dev->relbit[0] = BIT_MASK(REL_X) | + BIT_MASK(REL_Y); + context->qcitp_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | + BIT_MASK(BTN_MIDDLE) | + BIT_MASK(BTN_RIGHT); + + input_set_drvdata(context->qcitp_dev, context); + context->qcitp_dev->open = qcitp_open; + err = input_register_device(context->qcitp_dev); + if (err) { + pr_err("[QCI TouchPad] register device failed\n"); + goto register_fail; + } + + err = gpio_request(context->qcitp_gpio, "qci-pad"); + if (err) { + pr_err("[QCI TouchPad] gpio request failed\n"); + goto gpio_request_fail; + } + + context->qcitp_irq = gpio_to_irq(context->qcitp_gpio); + err = request_threaded_irq(context->qcitp_irq, NULL, qcitp_interrupt, + irq_trigger_type, client->name, context); + if (err) { + pr_err("[QCI TouchPad] request irq failed\n"); + goto request_irq_fail; + } + + err = sysfs_create_group(&client->dev.kobj, &attr_group); + if (err) + pr_warning("[QCI TouchPad] sysfs create failed\n"); + + return 0; + +request_irq_fail: + gpio_free(context->qcitp_gpio); + +gpio_request_fail: + input_unregister_device(context->qcitp_dev); + context->qcitp_dev = NULL; + +register_fail: + input_free_device(context->qcitp_dev); + +allocate_fail: + i2c_set_clientdata(client, NULL); + kfree(context); + return err; +} + +static int __devexit qcitp_remove(struct i2c_client *client) +{ + struct i2ctpad_drv_data *context = i2c_get_clientdata(client); + + free_irq(context->qcitp_irq, context); + gpio_free(context->qcitp_gpio); + input_unregister_device(context->qcitp_dev); + i2c_set_clientdata(client, NULL); + kfree(context); + + return 0; +} + +static struct i2c_driver i2ctp_driver = { + .driver = { + .owner = THIS_MODULE, + .name = TOUCHPAD_ID_NAME, +#ifdef CONFIG_PM + .pm = &qcitp_pm_ops, +#endif + }, + .probe = qcitp_probe, + .remove = __devexit_p(qcitp_remove), + .id_table = qcitp_idtable, +}; + +static int __init qcitp_init(void) +{ + return i2c_add_driver(&i2ctp_driver); +} + + +static void __exit qcitp_exit(void) +{ + i2c_del_driver(&i2ctp_driver); +} + +module_init(qcitp_init); +module_exit(qcitp_exit); + +MODULE_AUTHOR("Quanta Computer Inc."); +MODULE_DESCRIPTION("Quanta Embedded Controller I2C Touchpad Driver"); +MODULE_ALIAS("platform:qci-touchpad"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/input/qci_touchpad.h b/include/linux/input/qci_touchpad.h new file mode 100644 index 0000000..8e266e4 --- /dev/null +++ b/include/linux/input/qci_touchpad.h @@ -0,0 +1,25 @@ +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef __QCI_TOUCHPAD_H +#define __QCI_TOUCHPAD_H + +struct qci_touchpad_platform_data { + unsigned long irq_trigger_type; +}; + +#endif -- 1.7.1 -- Sent by an employee of the Qualcomm Innovation Center, Inc. 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