From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756799AbaAGDIS (ORCPT ); Mon, 6 Jan 2014 22:08:18 -0500 Received: from msr14.hinet.net ([168.95.4.114]:42953 "EHLO msr14.hinet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753555AbaAGDIQ (ORCPT ); Mon, 6 Jan 2014 22:08:16 -0500 From: Duson Lin To: linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, dmitry.torokhov@gmail.com Cc: bleung@chromium.org, agnescheng@chromium.org, phoenix@emc.com.tw, jeff.chuang@emc.com.tw, Duson Lin Subject: =?UTF-8?q?=5BPATCH=20v2=5D=20Input=3A=20add=20i2c/smbus=20driver=20for=20elan=20touchpad?= Date: Tue, 7 Jan 2014 11:08:03 +0800 Message-Id: <1389064083-11018-1-git-send-email-dusonlin@emc.com.tw> X-Mailer: git-send-email 1.7.10.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This driver adds support for elan i2c/smbus touchpad found on some laptops PC Signed-off-by: Duson Lin --- drivers/input/mouse/Kconfig | 10 + drivers/input/mouse/Makefile | 1 + drivers/input/mouse/elan_i2c.c | 890 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 901 insertions(+) create mode 100644 drivers/input/mouse/elan_i2c.c diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig index effa9c5..095eccc 100644 --- a/drivers/input/mouse/Kconfig +++ b/drivers/input/mouse/Kconfig @@ -215,6 +215,16 @@ config MOUSE_CYAPA To compile this driver as a module, choose M here: the module will be called cyapa. +config MOUSE_ELAN_I2C + tristate "ELAN I2C Touchpad support" + depends on I2C + help + This driver adds support for Elan I2C Trackpads. + Say Y here if you have a ELAN I2C Touchpad. + + To compile this driver as a module, choose M here: the module will be + called elan_i2c. + config MOUSE_INPORT tristate "InPort/MS/ATIXL busmouse" depends on ISA diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile index c25efdb..24a12a6 100644 --- a/drivers/input/mouse/Makefile +++ b/drivers/input/mouse/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_MOUSE_APPLETOUCH) += appletouch.o obj-$(CONFIG_MOUSE_ATARI) += atarimouse.o obj-$(CONFIG_MOUSE_BCM5974) += bcm5974.o obj-$(CONFIG_MOUSE_CYAPA) += cyapa.o +obj-$(CONFIG_MOUSE_ELAN_I2C) += elan_i2c.o obj-$(CONFIG_MOUSE_GPIO) += gpio_mouse.o obj-$(CONFIG_MOUSE_INPORT) += inport.o obj-$(CONFIG_MOUSE_LOGIBM) += logibm.o diff --git a/drivers/input/mouse/elan_i2c.c b/drivers/input/mouse/elan_i2c.c new file mode 100644 index 0000000..f7bfa22 --- /dev/null +++ b/drivers/input/mouse/elan_i2c.c @@ -0,0 +1,890 @@ +/* + * Elan I2C/SMBus Touchpad driver + * + * Copyright (c) 2013 ELAN Microelectronics Corp. + * + * Author: 林政維 (Duson Lin) + * Version: 1.4.6 + * + * Based on cyapa driver: + * copyright (c) 2011-2012 Cypress Semiconductor, Inc. + * copyright (c) 2011-2012 Google, Inc. + * + * 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. + * + * Trademarks are the property of their respective owners. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_NAME "elan_i2c" +#define ELAN_DRIVER_VERSION "1.4.6" +#define ETP_PRESSURE_OFFSET 25 +#define ETP_MAX_PRESSURE 255 +#define ETP_FWIDTH_REDUCE 90 +#define ETP_FINGER_WIDTH 15 + +#define ELAN_ADAPTER_FUNC_NONE 0 +#define ELAN_ADAPTER_FUNC_I2C 1 +#define ELAN_ADAPTER_FUNC_SMBUS 2 +#define ELAN_ADAPTER_FUNC_BOTH 3 + +/* Length of Elan touchpad information */ +#define ETP_INF_LENGTH 2 +#define ETP_MAX_FINGERS 5 +#define ETP_FINGER_DATA_LEN 5 +#define ETP_REPORT_ID 0x5D +#define ETP_MAX_REPORT_LEN 34 +#define ETP_ENABLE_ABS 0x0001 +#define ETP_ENABLE_CALIBRATE 0x0002 +#define ETP_DISABLE_CALIBRATE 0x0000 + +/* Elan smbus command */ +#define ETP_SMBUS_IAP_CMD 0x00 +#define ETP_SMBUS_ENABLE_TP 0x20 +#define ETP_SMBUS_SLEEP_CMD 0x21 +#define ETP_SMBUS_IAP_PASSWORD_WRITE 0x29 +#define ETP_SMBUS_IAP_PASSWORD_READ 0x80 +#define ETP_SMBUS_WRITE_FW_BLOCK 0x2A +#define ETP_SMBUS_IAP_RESET_CMD 0x2B +#define ETP_SMBUS_RANGE_CMD 0xA0 +#define ETP_SMBUS_FW_VERSION_CMD 0xA1 +#define ETP_SMBUS_XY_TRACENUM_CMD 0xA2 +#define ETP_SMBUS_SM_VERSION_CMD 0xA3 +#define ETP_SMBUS_UNIQUEID_CMD 0xA3 +#define ETP_SMBUS_RESOLUTION_CMD 0xA4 +#define ETP_SMBUS_HELLOPACKET_CMD 0xA7 +#define ETP_SMBUS_PACKET_QUERY 0xA8 +#define ETP_SMBUS_IAP_VERSION_CMD 0xAC +#define ETP_SMBUS_IAP_CTRL_CMD 0xAD +#define ETP_SMBUS_IAP_CHECKSUM_CMD 0xAE +#define ETP_SMBUS_FW_CHECKSUM_CMD 0xAF +#define ETP_SMBUS_MAX_BASELINE_CMD 0xC3 +#define ETP_SMBUS_MIN_BASELINE_CMD 0xC4 +#define ETP_SMBUS_CALIBRATE_QUERY 0xC5 +#define ETP_SMBUS_REPORT_LEN 32 +#define ETP_SMBUS_FINGER_DATA_OFFSET 2 +#define ETP_SMBUS_HELLOPACKET_LEN 5 +#define ETP_SMBUS_IAP_PASSWORD 0x1234 +#define ETP_SMBUS_IAP_MODE_ON (1<<6) + +/* Elan i2c command */ +#define ETP_I2C_RESET 0x0100 +#define ETP_I2C_WAKE_UP 0x0800 +#define ETP_I2C_SLEEP 0x0801 +#define ETP_I2C_DESC_CMD 0x0001 +#define ETP_I2C_REPORT_DESC_CMD 0x0002 +#define ETP_I2C_STAND_CMD 0x0005 +#define ETP_I2C_UNIQUEID_CMD 0x0101 +#define ETP_I2C_FW_VERSION_CMD 0x0102 +#define ETP_I2C_SM_VERSION_CMD 0x0103 +#define ETP_I2C_XY_TRACENUM_CMD 0x0105 +#define ETP_I2C_MAX_X_AXIS_CMD 0x0106 +#define ETP_I2C_MAX_Y_AXIS_CMD 0x0107 +#define ETP_I2C_RESOLUTION_CMD 0x0108 +#define ETP_I2C_IAP_VERSION_CMD 0x0110 +#define ETP_I2C_SET_CMD 0x0300 +#define ETP_I2C_MAX_BASELINE_CMD 0x0306 +#define ETP_I2C_MIN_BASELINE_CMD 0x0307 +#define ETP_I2C_FW_CHECKSUM_CMD 0x030F +#define ETP_I2C_IAP_CTRL_CMD 0x0310 +#define ETP_I2C_IAP_CMD 0x0311 +#define ETP_I2C_IAP_RESET_CMD 0x0314 +#define ETP_I2C_IAP_CHECKSUM_CMD 0x0315 +#define ETP_I2C_CALIBRATE_CMD 0x0316 +#define ETP_I2C_REPORT_LEN 34 +#define ETP_I2C_FINGER_DATA_OFFSET 4 +#define ETP_I2C_REPORT_ID_OFFSET 2 +#define ETP_I2C_DESC_LENGTH 30 +#define ETP_I2C_REPORT_DESC_LENGTH 158 +#define ETP_I2C_IAP_PASSWORD 0x1EA5 +#define ETP_I2C_IAP_RESET 0xF0F0 +#define ETP_I2C_MAIN_MODE_ON (1<<9) +#define ETP_I2C_IAP_REG_L 0x01 +#define ETP_I2C_IAP_REG_H 0x06 + +/* The main device structure */ +struct elan_tp_data { + struct i2c_client *client; + struct input_dev *input; + unsigned int max_x; + unsigned int max_y; + unsigned int width_x; + unsigned int width_y; + unsigned int irq; + u16 unique_id; + u16 fw_version; + u16 sm_version; + u16 iap_version; + bool smbus; +}; + +/* + ******************************************************************* + * Elan smbus interface + ******************************************************************* + */ +static int elan_smbus_initialize(struct i2c_client *client) +{ + u8 check[ETP_SMBUS_HELLOPACKET_LEN] = {0x55, 0x55, 0x55, 0x55, 0x55}; + u8 values[ETP_SMBUS_HELLOPACKET_LEN] = {0, 0, 0, 0, 0}; + int ret; + + /* Get hello packet */ + ret = i2c_smbus_read_block_data(client, + ETP_SMBUS_HELLOPACKET_CMD, values); + if (ret != ETP_SMBUS_HELLOPACKET_LEN) { + dev_err(&client->dev, "hello packet length fail\n"); + return -1; + } + + /* compare hello packet */ + if (memcmp(values, check, ETP_SMBUS_HELLOPACKET_LEN)) { + dev_err(&client->dev, "hello packet fail [%x %x %x %x %x]\n", + values[0], values[1], values[2], values[3], values[4]); + return -1; + } + + /* enable tp */ + ret = i2c_smbus_write_byte(client, ETP_SMBUS_ENABLE_TP); + return ret; +} + +static int elan_smbus_enable_absolute_mode(struct i2c_client *client) +{ + u8 cmd[4] = {0x00, 0x07, 0x00, ETP_ENABLE_ABS}; + + return i2c_smbus_write_block_data(client, ETP_SMBUS_IAP_CMD, 4, cmd); +} + +/* + ****************************************************************** + * Elan i2c interface + ****************************************************************** + */ +static int elan_i2c_read_block(struct i2c_client *client, + u16 reg, u8 *val, u16 len) +{ + struct i2c_msg msgs[2]; + u8 buf[2]; + int ret; + + buf[0] = reg & 0xff; + buf[1] = (reg >> 8) & 0xff; + + msgs[0].addr = client->addr; + msgs[0].flags = client->flags & I2C_M_TEN; + msgs[0].len = 2; + msgs[0].buf = buf; + + msgs[1].addr = client->addr; + msgs[1].flags = client->flags & I2C_M_TEN; + msgs[1].flags |= I2C_M_RD; + msgs[1].len = len; + msgs[1].buf = val; + + ret = i2c_transfer(client->adapter, msgs, 2); + return ret != 2 ? -EIO : 0; +} + +static int elan_i2c_read_cmd(struct i2c_client *client, u16 reg, u8 *val) +{ + int retval; + + retval = elan_i2c_read_block(client, reg, val, ETP_INF_LENGTH); + if (retval < 0) { + dev_err(&client->dev, "reading cmd (0x%04x) fail.\n", reg); + return retval; + } + return 0; +} + +static int elan_i2c_write_cmd(struct i2c_client *client, u16 reg, u16 cmd) +{ + struct i2c_msg msg; + u8 buf[4]; + int ret; + + buf[0] = reg & 0xff; + buf[1] = (reg >> 8) & 0xff; + buf[2] = cmd & 0xff; + buf[3] = (cmd >> 8) & 0xff; + + msg.addr = client->addr; + msg.flags = client->flags & I2C_M_TEN; + msg.len = 4; + msg.buf = buf; + + ret = i2c_transfer(client->adapter, &msg, 1); + return ret != 1 ? -EIO : 0; +} + +static int elan_i2c_reset(struct i2c_client *client) +{ + return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, + ETP_I2C_RESET); +} + +static int elan_i2c_wake_up(struct i2c_client *client) +{ + return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, + ETP_I2C_WAKE_UP); +} + +static int elan_i2c_sleep(struct i2c_client *client) +{ + return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, + ETP_I2C_SLEEP); +} + +static int elan_i2c_enable_absolute_mode(struct i2c_client *client) +{ + return elan_i2c_write_cmd(client, ETP_I2C_SET_CMD, + ETP_ENABLE_ABS); +} + +static int elan_i2c_get_desc(struct i2c_client *client, u8 *val) +{ + return elan_i2c_read_block(client, ETP_I2C_DESC_CMD, val, + ETP_I2C_DESC_LENGTH); +} + +static int elan_i2c_get_report_desc(struct i2c_client *client, u8 *val) +{ + return elan_i2c_read_block(client, ETP_I2C_REPORT_DESC_CMD, + val, ETP_I2C_REPORT_DESC_LENGTH); +} + +static int elan_i2c_initialize(struct i2c_client *client) +{ + struct device *dev = &client->dev; + int rc; + u8 val[256]; + + rc = elan_i2c_reset(client); + if (rc < 0) { + dev_err(dev, "device reset failed.\n"); + return -1; + } + + /* wait for get reset return flag */ + msleep(100); + /* get reset return flag 0000 */ + rc = i2c_master_recv(client, val, ETP_INF_LENGTH); + if (rc < 0) { + dev_err(dev, "get device reset return value failed.\n"); + return -1; + } + + rc = elan_i2c_get_desc(client, val); + if (rc < 0) { + dev_err(dev, "cannot get device descriptor.\n"); + return -1; + } + + rc = elan_i2c_get_report_desc(client, val); + if (rc < 0) { + dev_err(dev, "fetching report descriptor failed.\n"); + return -1; + } + return 0; +} + +/* + ****************************************************************** + * General functions + ****************************************************************** + */ +/* + * (value from firmware) * 10 + 790 = dpi + * we also have to convert dpi to dots/mm (*10/254 to avoid floating point) + */ +static unsigned int elan_convert_res(char val) +{ + int res; + if (val & 0x80) { + val = ~val + 1; + res = (790 - val * 10) * 10 / 254; + } else + res = (val * 10 + 790) * 10 / 254; + return res; +} + +static int elan_get_iap_version(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_IAP_VERSION_CMD, val); + ret = val[2]; + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_IAP_VERSION_CMD, val); + ret = val[0]; + } + return ret; +} + +static int elan_get_x_max(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_RANGE_CMD, val); + ret = (0x0f & val[0]) << 8 | val[1]; + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_MAX_X_AXIS_CMD, val); + ret = (0x0f & val[1]) << 8 | val[0]; + } + return ret; +} + +static int elan_get_y_max(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_RANGE_CMD, val); + ret = (0xf0 & val[0]) << 4 | val[2]; + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_MAX_Y_AXIS_CMD, val); + ret = (0x0f & val[1]) << 8 | val[0]; + } + return ret; +} + +static int elan_get_x_tracenum(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_XY_TRACENUM_CMD, val); + ret = (val[1] - 1); + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_XY_TRACENUM_CMD, val); + ret = (val[0] - 1); + } + return ret; +} + +static int elan_get_y_tracenum(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_XY_TRACENUM_CMD, val); + ret = (val[2] - 1); + } else { + ret = elan_i2c_read_cmd(data->client, + ETP_I2C_XY_TRACENUM_CMD, val); + ret = (val[1] - 1); + } + return ret; +} + +static int elan_get_fw_version(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_FW_VERSION_CMD, val); + ret = val[2]; + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_FW_VERSION_CMD, val); + ret = val[0]; + } + return ret; +} + +static int elan_get_sm_version(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_SM_VERSION_CMD, val); + else + elan_i2c_read_block(data->client, + ETP_I2C_SM_VERSION_CMD, val, 1); + ret = val[0]; + return ret; +} + +static int elan_get_unique_id(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_UNIQUEID_CMD, val); + ret = val[1]; + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_UNIQUEID_CMD, val); + ret = val[0]; + } + return ret; +} + +static int elan_get_x_resolution(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_RESOLUTION_CMD, val); + ret = elan_convert_res(val[1] & 0x0F); + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_RESOLUTION_CMD, val); + ret = elan_convert_res(val[0]); + } + return ret; +} + +static int elan_get_y_resolution(struct elan_tp_data *data) +{ + int ret; + u8 val[3]; + if (data->smbus) { + i2c_smbus_read_block_data(data->client, + ETP_SMBUS_RESOLUTION_CMD, val); + ret = elan_convert_res((val[1] & 0xF0) >> 4); + } else { + elan_i2c_read_cmd(data->client, + ETP_I2C_RESOLUTION_CMD, val); + ret = elan_convert_res(val[1]); + } + return ret; +} + +static int elan_initialize(struct elan_tp_data *data) +{ + int ret; + if (data->smbus) { + ret = elan_smbus_initialize(data->client); + if (ret < 0) { + dev_err(&data->client->dev, + "device initialize failed.\n"); + goto err_initialize; + } + + ret = elan_smbus_enable_absolute_mode(data->client); + if (ret < 0) + dev_err(&data->client->dev, + "cannot switch to absolute mode.\n"); + } else { + ret = elan_i2c_initialize(data->client); + if (ret < 0) { + dev_err(&data->client->dev, + "device initialize failed.\n"); + goto err_initialize; + } + + ret = elan_i2c_enable_absolute_mode(data->client); + if (ret < 0) { + dev_err(&data->client->dev, + "cannot switch to absolute mode.\n"); + goto err_initialize; + } + + ret = elan_i2c_wake_up(data->client); + if (ret < 0) + dev_err(&data->client->dev, + "device wake up failed.\n"); + } +err_initialize: + return ret; +} + + +/* + ****************************************************************** + * Elan isr functions + ****************************************************************** + */ +static int elan_check_packet(struct elan_tp_data *data, u8 *packet) +{ + u8 rid; + + if (data->smbus) + rid = packet[0]; + else + rid = packet[ETP_I2C_REPORT_ID_OFFSET]; + + /* check report id */ + if (rid != ETP_REPORT_ID) { + dev_err(&data->client->dev, "report id [%x] fail.\n", rid); + return -1; + } + return 0; +} + +static void elan_report_absolute(struct elan_tp_data *data, u8 *packet) +{ + struct input_dev *input = data->input; + u8 *finger_data; + bool finger_on; + int pos_x, pos_y; + int pressure, mk_x, mk_y; + int i, area_x, area_y, major, minor, new_pressure; + int finger_count = 0; + int btn_click; + u8 tp_info; + + if (data->smbus) { + finger_data = &packet[ETP_SMBUS_FINGER_DATA_OFFSET]; + tp_info = packet[1]; + } else { + finger_data = &packet[ETP_I2C_FINGER_DATA_OFFSET]; + tp_info = packet[3]; + } + + btn_click = (tp_info & 0x01); + for (i = 0; i < ETP_MAX_FINGERS; i++) { + finger_on = (tp_info >> (3 + i)) & 0x01; + + /* analyze touched finger raw data*/ + if (finger_on) { + pos_x = ((finger_data[0] & 0xf0) << 4) | + finger_data[1]; + pos_y = ((finger_data[0] & 0x0f) << 8) | + finger_data[2]; + pos_y = data->max_y - pos_y; + mk_x = (finger_data[3] & 0x0f); + mk_y = (finger_data[3] >> 4); + pressure = finger_data[4]; + + /* + * to avoid fat finger be as palm, so reduce the + * width x and y per trace + */ + area_x = mk_x * (data->width_x - ETP_FWIDTH_REDUCE); + area_y = mk_y * (data->width_y - ETP_FWIDTH_REDUCE); + + major = max(area_x, area_y); + minor = min(area_x, area_y); + + new_pressure = pressure + ETP_PRESSURE_OFFSET; + if (new_pressure > ETP_MAX_PRESSURE) + new_pressure = ETP_MAX_PRESSURE; + + input_mt_slot(input, i); + input_mt_report_slot_state(input, MT_TOOL_FINGER, + true); + input_report_abs(input, ABS_MT_POSITION_X, pos_x); + input_report_abs(input, ABS_MT_POSITION_Y, pos_y); + input_report_abs(input, ABS_MT_PRESSURE, new_pressure); + input_report_abs(input, ABS_TOOL_WIDTH, mk_x); + input_report_abs(input, ABS_MT_TOUCH_MAJOR, major); + input_report_abs(input, ABS_MT_TOUCH_MINOR, minor); + finger_data += ETP_FINGER_DATA_LEN; + finger_count++; + } else { + input_mt_slot(input, i); + input_mt_report_slot_state(input, + MT_TOOL_FINGER, false); + } + } + + input_report_key(input, BTN_LEFT, (btn_click == 1)); + input_mt_report_pointer_emulation(input, true); + input_sync(input); +} + +static irqreturn_t elan_isr(int irq, void *dev_id) +{ + struct elan_tp_data *data = dev_id; + u8 raw[ETP_MAX_REPORT_LEN]; + int retval; + int report_len; + + if (data->smbus) { + report_len = ETP_SMBUS_REPORT_LEN; + retval = i2c_smbus_read_block_data(data->client, + ETP_SMBUS_PACKET_QUERY, + raw); + } else { + report_len = ETP_I2C_REPORT_LEN; + retval = i2c_master_recv(data->client, raw, report_len); + } + + if (retval != report_len) { + dev_err(&data->client->dev, "wrong packet len(%d)", retval); + goto elan_isr_end; + } + + if (elan_check_packet(data, raw) < 0) { + dev_err(&data->client->dev, "wrong packet format."); + goto elan_isr_end; + } + elan_report_absolute(data, raw); + +elan_isr_end: + return IRQ_HANDLED; +} + +/* + ****************************************************************** + * Elan initial functions + ****************************************************************** + */ +static int elan_input_dev_create(struct elan_tp_data *data) +{ + struct i2c_client *client = data->client; + struct input_dev *input; + unsigned int x_res, y_res; + int ret, max_width, min_width; + + data->input = input = input_allocate_device(); + if (!input) + return -ENOMEM; + input->name = "Elan Touchpad"; + input->id.bustype = BUS_I2C; + input->dev.parent = &data->client->dev; + + __set_bit(EV_ABS, input->evbit); + __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); + __set_bit(BTN_LEFT, input->keybit); + + data->unique_id = elan_get_unique_id(data); + data->fw_version = elan_get_fw_version(data); + data->sm_version = elan_get_sm_version(data); + data->iap_version = elan_get_iap_version(data); + data->max_x = elan_get_x_max(data); + data->max_y = elan_get_y_max(data); + data->width_x = data->max_x / elan_get_x_tracenum(data); + data->width_y = data->max_y / elan_get_y_tracenum(data); + x_res = elan_get_x_resolution(data); + y_res = elan_get_y_resolution(data); + max_width = max(data->width_x, data->width_y); + min_width = min(data->width_x, data->width_y); + + dev_dbg(&client->dev, + "Elan Touchpad Information:\n" + " Module unique ID: 0x%04x\n" + " Firmware Version: 0x%04x\n" + " Sample Version: 0x%04x\n" + " IAP Version: 0x%04x\n" + " Max ABS X,Y: %d,%d\n" + " Width X,Y: %d,%d\n" + " Resolution X,Y: %d,%d (dots/mm)\n", + data->unique_id, + data->fw_version, + data->sm_version, + data->iap_version, + data->max_x, data->max_y, + data->width_x, data->width_y, + x_res, y_res); + + input_set_abs_params(input, ABS_X, 0, data->max_x, 0, 0); + input_set_abs_params(input, ABS_Y, 0, data->max_y, 0, 0); + input_abs_set_res(input, ABS_X, x_res); + input_abs_set_res(input, ABS_Y, y_res); + input_set_abs_params(input, ABS_PRESSURE, 0, ETP_MAX_PRESSURE, 0, 0); + input_set_abs_params(input, ABS_TOOL_WIDTH, 0, ETP_FINGER_WIDTH, 0, 0); + + /* handle pointer emulation and unused slots in core */ + ret = input_mt_init_slots(input, ETP_MAX_FINGERS, + INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); + if (ret) { + dev_err(&client->dev, "allocate MT slots failed, %d\n", ret); + goto err_free_device; + } + input_set_abs_params(input, ABS_MT_POSITION_X, 0, data->max_x, 0, 0); + input_set_abs_params(input, ABS_MT_POSITION_Y, 0, data->max_y, 0, 0); + input_abs_set_res(input, ABS_MT_POSITION_X, x_res); + input_abs_set_res(input, ABS_MT_POSITION_Y, y_res); + input_set_abs_params(input, ABS_MT_PRESSURE, 0, + ETP_MAX_PRESSURE, 0, 0); + input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, + ETP_FINGER_WIDTH * max_width, 0, 0); + input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, + ETP_FINGER_WIDTH * min_width, 0, 0); + + /* Register the device in input subsystem */ + ret = input_register_device(input); + if (ret) { + dev_err(&client->dev, "input_dev register failed, %d\n", ret); + goto err_free_device; + } + + return 0; + +err_free_device: + input_free_device(input); + return ret; +} + +static u8 elan_check_adapter_functionality(struct i2c_client *client) +{ + u8 ret = ELAN_ADAPTER_FUNC_NONE; + + if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + ret |= ELAN_ADAPTER_FUNC_I2C; + if (i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_BLOCK_DATA | + I2C_FUNC_SMBUS_I2C_BLOCK)) + ret |= ELAN_ADAPTER_FUNC_SMBUS; + return ret; +} + +static int elan_probe(struct i2c_client *client, + const struct i2c_device_id *dev_id) +{ + struct elan_tp_data *data; + int ret; + u8 adapter_func; + union i2c_smbus_data dummy; + struct device *dev = &client->dev; + + adapter_func = elan_check_adapter_functionality(client); + if (adapter_func == ELAN_ADAPTER_FUNC_NONE) { + dev_err(dev, "not a supported I2C/SMBus adapter\n"); + return -EIO; + } + + /* Make sure there is something at this address */ + if (i2c_smbus_xfer(client->adapter, client->addr, 0, + I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) + return -ENODEV; + + data = kzalloc(sizeof(struct elan_tp_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* check protocol type */ + if (adapter_func == ELAN_ADAPTER_FUNC_SMBUS) + data->smbus = true; + else + data->smbus = false; + data->client = client; + data->irq = client->irq; + + ret = request_threaded_irq(client->irq, NULL, elan_isr, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + client->name, data); + if (ret < 0) { + dev_err(&client->dev, "cannot register irq=%d\n", + client->irq); + goto err_irq; + } + + /* initial elan touch pad */ + ret = elan_initialize(data); + if (ret < 0) + goto err_init; + + /* create input device */ + ret = elan_input_dev_create(data); + if (ret < 0) + goto err_input_dev; + + device_init_wakeup(&client->dev, 1); + i2c_set_clientdata(client, data); + return 0; + +err_input_dev: +err_init: + free_irq(data->irq, data); +err_irq: + kfree(data); + dev_err(&client->dev, "Elan Trackpad probe fail!\n"); + return ret; +} + +static int elan_remove(struct i2c_client *client) +{ + struct elan_tp_data *data = i2c_get_clientdata(client); + free_irq(data->irq, data); + input_unregister_device(data->input); + kfree(data); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int elan_suspend(struct device *dev) +{ + int ret = 0; + struct elan_tp_data *data = dev_get_drvdata(dev); + + disable_irq(data->irq); + if (data->smbus) + ret = i2c_smbus_write_byte(data->client, + ETP_SMBUS_SLEEP_CMD); + else + ret = elan_i2c_sleep(data->client); + + if (ret < 0) + dev_err(dev, "suspend mode failed, %d\n", ret); + + return ret; +} + +static int elan_resume(struct device *dev) +{ + int ret = 0; + struct elan_tp_data *data = dev_get_drvdata(dev); + + ret = elan_initialize(data); + if (ret < 0) + dev_err(dev, "resume active power failed, %d\n", ret); + + enable_irq(data->irq); + return ret; +} +#endif + +static SIMPLE_DEV_PM_OPS(elan_pm_ops, elan_suspend, elan_resume); + +static const struct i2c_device_id elan_id[] = { + { DRIVER_NAME, 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, elan_id); + +static struct i2c_driver elan_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .pm = &elan_pm_ops, + }, + .probe = elan_probe, + .remove = elan_remove, + .id_table = elan_id, +}; + +module_i2c_driver(elan_driver); + +MODULE_AUTHOR("Duson Lin "); +MODULE_DESCRIPTION("Elan I2C/SMBus Touchpad driver"); +MODULE_LICENSE("GPL"); -- 1.7.10.4