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Date: Fri, 24 Apr 2015 00:21:31 +0800
From: HungNien Chen <hn.chen@...dahitech.com>
To: linux-input@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, dmitry.torokhov@...il.com,
HungNien Chen <hn.chen@...dahitech.com>
Subject: [PATCH] [Input: add a driver for wdt87xx touchscreen controller] The main function of this driver is to report touch events and update firmware for the controller.
Signed-off-by: HungNien Chen <hn.chen@...dahitech.com>
---
drivers/input/touchscreen/Kconfig | 12 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/wdt87xx_i2c.c | 1495 +++++++++++++++++++++++++++++++
3 files changed, 1508 insertions(+)
create mode 100644 drivers/input/touchscreen/wdt87xx_i2c.c
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 80f6386..0c1a6cc 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -658,6 +658,18 @@ config TOUCHSCREEN_PIXCIR
To compile this driver as a module, choose M here: the
module will be called pixcir_i2c_ts.
+config TOUCHSCREEN_WDT87XX_I2C
+ tristate "Weida HiTech I2C touchscreen"
+ depends on I2C
+ help
+ Say Y here if you have an Weida WDT87XX I2C touchscreen
+ connected to your system.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called wdt87xx_i2c.
+
config TOUCHSCREEN_WM831X
tristate "Support for WM831x touchscreen controllers"
depends on MFD_WM831X
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 44deea7..fa3d33b 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -72,6 +72,7 @@ obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o
obj-$(CONFIG_TOUCHSCREEN_WACOM_I2C) += wacom_i2c.o
+obj-$(CONFIG_TOUCHSCREEN_WDT87XX_I2C) += wdt87xx_i2c.o
obj-$(CONFIG_TOUCHSCREEN_WM831X) += wm831x-ts.o
obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o
wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9705) += wm9705.o
diff --git a/drivers/input/touchscreen/wdt87xx_i2c.c b/drivers/input/touchscreen/wdt87xx_i2c.c
new file mode 100644
index 0000000..c77296c
--- /dev/null
+++ b/drivers/input/touchscreen/wdt87xx_i2c.c
@@ -0,0 +1,1495 @@
+/*
+ * drivers/input/touchscreen/wdt87xx_i2c.c
+ *
+ * Weida HiTech WDT87xx TouchScreen I2C driver
+ *
+ * Copyright (c) 2014 Weida HiTech Ltd.
+ * HN Chen <hn.chen@...dahitech.com>
+ *
+ * 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.
+ *
+ * Note: this is a I2C device driver and report touch events througt the
+ * input device
+ */
+
+
+#include <linux/version.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/ioc4.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/firmware.h>
+#include <linux/gpio.h>
+#include <linux/input/mt.h>
+#include <asm/unaligned.h>
+
+#ifdef CONFIG_ACPI
+#include <linux/acpi.h>
+#endif
+
+#define WDT87XX_NAME "wdt87xx_i2c"
+#define WDT87XX_DRV_VER "0.9.0"
+#define WDT87XX_FW_NAME "wdt87xx_fw.bin"
+
+#define WDT87XX_FW 1
+#define WDT87XX_CFG 2
+
+#define MODE_ACTIVE 0x01
+#define MODE_READY 0x02
+#define MODE_IDLE 0x03
+#define MODE_SLEEP 0x04
+#define MODE_STOP 0xFF
+
+#define WDT_MAX_POINT 10
+#define WDT_RAW_BUF_COUNT 54
+
+#define PG_SIZE 0x1000
+#define MAX_RETRIES 3
+
+/* the definition for one touch point */
+struct wdt_touch_point_event_st {
+ unsigned char id;
+ unsigned short x;
+ unsigned short y;
+} __packed;
+
+
+/* the definition for a packet */
+struct wdt_touch_events_st {
+ unsigned char report_id;
+ struct wdt_touch_point_event_st touch_event[WDT_MAX_POINT];
+ unsigned short scan_time;
+ unsigned char num_touches;
+} __packed;
+
+/* the definition for the chip parameters */
+struct sys_param_st {
+ unsigned short fw_id;
+ unsigned short plat_id;
+ unsigned short xmls_id1;
+ unsigned short xmls_id2;
+ unsigned short phy_x;
+ unsigned short phy_y;
+} __packed;
+
+/* the definition for this driver needed */
+struct wdt87xx_ts_data {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+/* to protect the operation in sysfs */
+ struct mutex sysfs_mutex;
+ unsigned int max_retries;
+ struct sys_param_st sys_param;
+};
+
+/* communacation commands */
+#define PACKET_SIZE 56
+#define VND_REQ_READ 0x06
+#define VND_READ_DATA 0x07
+#define VND_REQ_WRITE 0x08
+
+#define VND_CMD_START 0x00
+#define VND_CMD_STOP 0x01
+#define VND_CMD_RESET 0x09
+
+#define VND_CMD_ERASE 0x1A
+
+#define VND_GET_CHECKSUM 0x66
+
+#define VND_SET_DATA 0x83
+#define VND_SET_COMMAND_DATA 0x84
+#define VND_SET_CHECKSUM_CALC 0x86
+#define VND_SET_CHECKSUM_LENGTH 0x87
+
+#define VND_CMD_SFLCK 0xFC
+#define VND_CMD_SFUNL 0xFD
+
+#define STRIDX_PLATFORM_ID 0x80
+#define STRIDX_PARAMETERS 0x81
+
+
+/* the definition of command structure */
+union cmd_data_un {
+ struct {
+ char report_id;
+ char type;
+ unsigned short index;
+ unsigned int length;
+ } defined_data;
+ char buffer[8];
+};
+
+/* the definition of packet structure */
+union req_data_un {
+ struct {
+ char report_id;
+ char type;
+ unsigned short index;
+ unsigned int length;
+ char data[PACKET_SIZE];
+ } defined_data;
+ char buffer[64];
+};
+
+/* the definition of firmware data structure */
+struct chunk_info_st {
+ unsigned int target_start_addr;
+ unsigned int length;
+ unsigned int source_start_addr;
+ unsigned int version_number;
+ unsigned int attribute;
+ unsigned int temp;
+};
+
+struct chunk_data_st {
+ unsigned int ck_id;
+ unsigned int ck_size;
+ struct chunk_info_st chunk_info;
+ char *chunk_data;
+};
+
+struct format_chunk_st {
+ unsigned int ck_id;
+ unsigned int ck_size;
+ unsigned int number_chunk;
+ unsigned int enable_flag;
+ unsigned int checksum;
+ unsigned int temp1;
+ unsigned int temp2;
+};
+
+struct chunk_info_ex_st {
+ struct chunk_info_st chunk_info;
+ char *data;
+ unsigned int length;
+};
+
+/* the definition of firmware chunk tags */
+#define FOURCC_ID_RIFF 0x46464952
+#define FOURCC_ID_WHIF 0x46494857
+#define FOURCC_ID_FRMT 0x544D5246
+#define FOURCC_ID_FRWR 0x52575246
+#define FOURCC_ID_CNFG 0x47464E43
+
+#define CHUNK_ID_FRMT 0x00
+#define CHUNK_ID_FRWR 0x01
+#define CHUNK_ID_CNFG 0x02
+
+/* the definition of gpio & data irq */
+#ifndef CONFIG_ACPI
+/*
+ * for kernel version >= 3.18.0, the gpio number is 338
+ * #define DINT_GPIO_NUM 338
+ */
+#define DINT_GPIO_NUM 82
+#endif
+
+/* for the touch report */
+static int SCREEN_LOGICAL_MAX_X = 0x7FFF;
+static int SCREEN_LOGICAL_MAX_Y = 0x7FFF;
+
+/* output the error message */
+#define dev_err(__dev, x...) dev_err(__dev, x)
+
+static int wdt87xx_i2c_txrxdata(struct i2c_client *client, char *txdata,
+ int txlen, char *rxdata, int rxlen);
+static int wdt87xx_i2c_rxdata(struct i2c_client *client, char *rxdata,
+ int length);
+static int wdt87xx_i2c_txdata(struct i2c_client *client, char *txdata,
+ int length);
+static int wdt87xx_set_feature(struct i2c_client *client, char *buf,
+ unsigned int buf_size);
+static int wdt87xx_get_feature(struct i2c_client *client, char *buf,
+ unsigned int buf_size);
+static int wdt87xx_get_string(struct i2c_client *client, char str_idx,
+ char *buf, unsigned int buf_size);
+
+static unsigned int get_chunk_fourcc(unsigned int chunk_index)
+{
+ switch (chunk_index) {
+ case CHUNK_ID_FRMT:
+ return FOURCC_ID_FRMT;
+ case CHUNK_ID_FRWR:
+ return FOURCC_ID_FRWR;
+ case CHUNK_ID_CNFG:
+ return FOURCC_ID_CNFG;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+static int get_chunk_info(const struct firmware *fw, unsigned int chunk_index,
+ struct chunk_info_ex_st *chunk_info_ex,
+ struct format_chunk_st *format_chunk)
+{
+ unsigned int chunk_four_cc;
+ const char *data = 0;
+ unsigned int data_len = 0;
+ unsigned int is_found = 0;
+
+ /* check the pointer is null */
+ if (!fw || !chunk_info_ex || !format_chunk)
+ return -EINVAL;
+
+ chunk_four_cc = get_chunk_fourcc(chunk_index);
+
+ if (!chunk_four_cc)
+ return -EBADRQC;
+
+ data = fw->data;
+ data_len = fw->size;
+
+ /* check if the chunk is existed */
+ if (format_chunk->enable_flag | chunk_index) {
+ unsigned int chunk_start_pos = 12
+ + sizeof(struct format_chunk_st);
+ struct chunk_data_st *chunk_data = 0;
+
+ while (chunk_start_pos < data_len && !is_found) {
+ chunk_data = (struct chunk_data_st *)
+ &data[chunk_start_pos];
+
+ /* the chunk is found */
+ if (chunk_data->ck_id == chunk_four_cc) {
+ memcpy((void *) &chunk_info_ex->chunk_info,
+ (void *) &chunk_data->chunk_info,
+ sizeof(struct chunk_info_st));
+ chunk_info_ex->length =
+ chunk_data->chunk_info.length;
+ chunk_info_ex->data =
+ (char *) &data[chunk_start_pos + 8
+ + sizeof(struct chunk_info_st)];
+
+ is_found = 1;
+ } else {
+ chunk_start_pos = chunk_start_pos
+ + chunk_data->ck_size + 8;
+ }
+ }
+ }
+
+ if (is_found)
+ return 0;
+
+ return -ENODATA;
+}
+
+static int wdt87xx_get_sysparam(struct i2c_client *client,
+ struct wdt87xx_ts_data *dev_wdt87xx)
+{
+ struct sys_param_st *sys_param = &dev_wdt87xx->sys_param;
+ char buffer[72];
+ unsigned int *u32_data;
+ int err = 0;
+
+ err = wdt87xx_get_string(client, STRIDX_PARAMETERS, buffer, 32);
+ if (err) {
+ dev_err(&client->dev, "get parameters error (%d)\n", err);
+ return err;
+ }
+
+ memcpy((void *) &dev_wdt87xx->sys_param, buffer,
+ sizeof(struct sys_param_st));
+
+ err = wdt87xx_get_string(client, STRIDX_PLATFORM_ID, buffer, 8);
+ if (err) {
+ dev_err(&client->dev, "get platform id error (%d)\n", err);
+ return err;
+ }
+
+ dev_wdt87xx->sys_param.plat_id = buffer[1];
+
+ buffer[0] = 0xf2;
+ err = wdt87xx_get_feature(client, buffer, 16);
+ if (err) {
+ dev_err(&client->dev, "get firmware id error (%d)\n", err);
+ return err;
+ }
+
+ if (buffer[0] != 0xf2) {
+ dev_err(&client->dev, "fw id packet error !\n");
+ return -EBADRQC;
+ }
+
+ u32_data = (unsigned int *) &buffer[1];
+ sys_param->fw_id = ((*u32_data) & 0xFFFF);
+
+ dev_err(&client->dev, "fw_id: 0x%x, plat_id: 0x%x\n",
+ sys_param->fw_id, sys_param->plat_id);
+ dev_err(&client->dev, "xml_id1: %4x, xml_id2: %4x\n",
+ sys_param->xmls_id1, sys_param->xmls_id2);
+
+ return 0;
+}
+
+int process_fw_data(struct i2c_client *client, const struct firmware *fw,
+ struct format_chunk_st *format_chunk)
+{
+ struct wdt87xx_ts_data *dev_wdt87xx = i2c_get_clientdata(client);
+ unsigned int length = 0;
+ struct chunk_info_ex_st chunk_info_ex;
+ int err = 0;
+ unsigned int *u32_data;
+ char fw_id;
+ char chip_id;
+
+ /* check the pointer is null */
+ if (!fw || !format_chunk)
+ return -EINVAL;
+
+ u32_data = (unsigned int *) fw->data;
+ length = fw->size;
+
+ if (u32_data[0] != FOURCC_ID_RIFF || u32_data[2] != FOURCC_ID_WHIF) {
+ dev_err(&client->dev, "Check data tag failed !\n");
+ return -EBADRQC;
+ }
+
+ /* the length should be equal */
+ if (length != u32_data[1]) {
+ dev_err(&client->dev, "Check data length failed !\n");
+ return -EINVAL;
+ }
+
+ memcpy(format_chunk, &u32_data[3], sizeof(struct format_chunk_st));
+
+ dev_dbg(&client->dev, "version checking\n");
+
+ /* get the version number from the firmware */
+ err = get_chunk_info(fw, CHUNK_ID_FRWR, &chunk_info_ex,
+ format_chunk);
+ if (err) {
+ dev_err(&client->dev, "can not extract data !\n");
+ return -EBADR;
+ }
+
+ fw_id = ((chunk_info_ex.chunk_info.version_number >> 12) & 0xF);
+ chip_id = (((dev_wdt87xx->sys_param.fw_id) >> 12) & 0xF);
+
+ if (fw_id != chip_id) {
+ wdt87xx_get_sysparam(client, dev_wdt87xx);
+ chip_id = (((dev_wdt87xx->sys_param.fw_id) >> 12) & 0xF);
+
+ if (fw_id != chip_id) {
+ dev_err(&client->dev, "FW is not match: ");
+ dev_err(&client->dev, "fw(%d), chip(%d)\n",
+ fw_id, chip_id);
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
+/* functions for the sysfs implementation */
+static int wdt87xx_check_firmware(struct chunk_info_ex_st *chunk_info_ex,
+ int ck_id)
+{
+ /* check the pointer is null */
+ if (!chunk_info_ex)
+ return -EINVAL;
+
+ if (ck_id == CHUNK_ID_FRWR) {
+ unsigned int is_found = 0;
+ unsigned char firmware_id[] = { 0xf5, 0x68, 0xe3, 0xa9 };
+
+ if (memcmp(chunk_info_ex->data, firmware_id, 4) == 0)
+ is_found = 1;
+ else
+ return -EFAULT;
+
+ if (is_found)
+ return 0;
+ }
+
+ return 0;
+}
+
+static int wdt87xx_set_feature(struct i2c_client *client, char *buf,
+ unsigned int buf_size)
+{
+ int err = 0;
+ union req_data_un *req_data = (union req_data_un *) buf;
+ int data_len = 0;
+ /* for set/get packets used */
+ unsigned char xfer_buffer[80];
+
+ /* buffer size must be smaller than 64 */
+ if (buf_size > 64)
+ buf_size = 64;
+
+ /* set feature command packet */
+ xfer_buffer[data_len++] = 0x22;
+ xfer_buffer[data_len++] = 0x00;
+ if (req_data->defined_data.report_id > 0xF) {
+ xfer_buffer[data_len++] = 0x30;
+ xfer_buffer[data_len++] = 0x03;
+ xfer_buffer[data_len++] = (req_data->defined_data.report_id);
+ } else {
+ xfer_buffer[data_len++] = 0x30 |
+ (req_data->defined_data.report_id);
+ xfer_buffer[data_len++] = 0x03;
+ }
+ xfer_buffer[data_len++] = 0x23;
+ xfer_buffer[data_len++] = 0x00;
+ xfer_buffer[data_len++] = (buf_size & 0xFF);
+ xfer_buffer[data_len++] = ((buf_size & 0xFF00) >> 8);
+
+ memcpy(&xfer_buffer[data_len], buf, buf_size);
+
+ err = wdt87xx_i2c_txdata(client, xfer_buffer, data_len + buf_size);
+
+ if (err < 0) {
+ dev_err(&client->dev, "error no: (%d)\n", err);
+ return err;
+ }
+
+ mdelay(2);
+
+ return 0;
+}
+
+static int wdt87xx_get_feature(struct i2c_client *client, char *buf,
+ unsigned int buf_size)
+{
+ int err = 0;
+ char tx_buffer[8];
+ char xfer_buffer[80];
+ union req_data_un *req_data = (union req_data_un *) buf;
+ int data_len = 0;
+ unsigned int xfer_length = 0;
+
+ if (buf_size > 64)
+ buf_size = 64;
+
+ /* get feature command packet */
+ tx_buffer[data_len++] = 0x22;
+ tx_buffer[data_len++] = 0x00;
+ if (req_data->defined_data.report_id > 0xF) {
+ tx_buffer[data_len++] = 0x30;
+ tx_buffer[data_len++] = 0x02;
+ tx_buffer[data_len++] = (req_data->defined_data.report_id);
+ } else {
+ tx_buffer[data_len++] = 0x30 |
+ (req_data->defined_data.report_id);
+ tx_buffer[data_len++] = 0x02;
+ }
+ tx_buffer[data_len++] = 0x23;
+ tx_buffer[data_len++] = 0x00;
+
+ err = wdt87xx_i2c_txrxdata(client, tx_buffer, data_len, xfer_buffer,
+ buf_size + 2);
+
+ if (err < 0) {
+ dev_err(&client->dev, "error no: (%d)\n", err);
+ return err;
+ }
+
+ /* check size and copy the return data */
+ xfer_length = (unsigned int) xfer_buffer[1];
+ xfer_length = (xfer_length << 8) | xfer_buffer[0];
+
+ if (buf_size < xfer_length)
+ xfer_length = buf_size;
+
+ memcpy(buf, &xfer_buffer[2], xfer_length);
+
+ mdelay(2);
+
+ return 0;
+}
+
+static int wdt87xx_get_string(struct i2c_client *client, char str_idx,
+ char *buf, unsigned int buf_size)
+{
+ int err = 0;
+ char tx_buffer[8] = { 0x22, 0x00, 0x13, 0x0E,
+ 0x00, 0x23, 0x00, 0x00 };
+ char xfer_buffer[80];
+ unsigned int xfer_length;
+
+ if (buf_size > 64)
+ buf_size = 64;
+
+ tx_buffer[4] = str_idx;
+
+ err = wdt87xx_i2c_txrxdata(client, tx_buffer, 7, xfer_buffer,
+ buf_size + 2);
+
+ if (err < 0) {
+ dev_err(&client->dev, "error no: (%d)\n", err);
+ return err;
+ }
+
+ if (xfer_buffer[1] != 0x03) {
+ dev_err(&client->dev, "error str id: (%d)\n", xfer_buffer[1]);
+ return -EBADRQC;
+ }
+
+ xfer_length = xfer_buffer[0];
+
+ if (buf_size < xfer_length)
+ xfer_length = buf_size;
+
+ memcpy(buf, &xfer_buffer[2], xfer_length);
+
+ mdelay(2);
+
+ return 0;
+}
+
+
+static int wdt87xx_send_command(struct i2c_client *client, int cmd, int value)
+{
+ union cmd_data_un cmd_data;
+
+ /* set the command packet */
+ cmd_data.defined_data.report_id = VND_REQ_WRITE;
+ cmd_data.defined_data.type = VND_SET_COMMAND_DATA;
+ cmd_data.defined_data.index = (unsigned short) cmd;
+
+ switch (cmd) {
+ case VND_CMD_START:
+ case VND_CMD_STOP:
+ case VND_CMD_RESET:
+ /* mode selector */
+ cmd_data.defined_data.length = (char) (value & 0xFF);
+ break;
+ case VND_CMD_SFLCK:
+ put_unaligned_le16(0xC39B, &cmd_data.buffer[3]);
+ break;
+ case VND_CMD_SFUNL:
+ put_unaligned_le16(0x95DA, &cmd_data.buffer[3]);
+ break;
+ case VND_CMD_ERASE:
+ case VND_SET_CHECKSUM_CALC:
+ case VND_SET_CHECKSUM_LENGTH:
+ put_unaligned_le32(value, &cmd_data.buffer[3]);
+ break;
+ default:
+ cmd_data.defined_data.report_id = 0;
+ dev_err(&client->dev, "Invalid command: (%d)", cmd);
+ return -EINVAL;
+ }
+
+ return wdt87xx_set_feature(client, &cmd_data.buffer[0],
+ sizeof(cmd_data));
+}
+
+static int wdt87xx_write_data(struct i2c_client *client,
+ const char *data, unsigned int address, int length)
+{
+ unsigned int addr_start, data_len, packet_size;
+ int count = 0;
+ int err = 0;
+ union req_data_un req_data;
+ const char *source_data = 0;
+
+ source_data = data;
+ data_len = length;
+ addr_start = address;
+
+ /* address and length should be 4 bytes alignment */
+ if ((addr_start & 0x3) != 0 || (data_len & 0x3) != 0) {
+ dev_err(&client->dev, "addr & len must be aligned %x, %x\n",
+ addr_start, data_len);
+ return -EFAULT;
+ }
+
+ packet_size = PACKET_SIZE;
+
+ req_data.defined_data.report_id = VND_REQ_WRITE;
+ req_data.defined_data.type = VND_SET_DATA;
+
+ while (data_len) {
+ if (data_len < PACKET_SIZE)
+ packet_size = data_len;
+
+ req_data.defined_data.index = packet_size;
+ req_data.defined_data.length = addr_start;
+
+ memcpy(req_data.defined_data.data, source_data, packet_size);
+
+ err = wdt87xx_set_feature(client, req_data.buffer, 64);
+
+ if (err)
+ break;
+
+ data_len = data_len - packet_size;
+ source_data = source_data + packet_size;
+ addr_start = addr_start + packet_size;
+
+ count++;
+
+ mdelay(4);
+
+ if ((count % 64) == 0) {
+ count = 0;
+ dev_dbg(&client->dev, "#");
+ }
+ }
+
+ dev_dbg(&client->dev, "#\n");
+
+ return err;
+}
+
+static unsigned short misr(unsigned short currentValue,
+ unsigned char newValue)
+{
+ unsigned int a, b;
+ unsigned int bit0;
+ unsigned int y;
+
+ a = currentValue;
+ b = newValue;
+ bit0 = a^(b&1);
+ bit0 ^= a>>1;
+ bit0 ^= a>>2;
+ bit0 ^= a>>4;
+ bit0 ^= a>>5;
+ bit0 ^= a>>7;
+ bit0 ^= a>>11;
+ bit0 ^= a>>15;
+ y = (a<<1)^b;
+ y = (y&~1) | (bit0&1);
+
+ return (unsigned short) y;
+}
+
+static int wdt87xx_get_checksum(struct i2c_client *client,
+ unsigned int *checksum, unsigned int address, int length)
+{
+ int err = 0;
+ int time_delay = 0;
+ union req_data_un req_data;
+ union cmd_data_un cmd_data;
+
+ err = wdt87xx_send_command(client, VND_SET_CHECKSUM_LENGTH, length);
+ if (err) {
+ dev_err(&client->dev, "set checksum length fail (%d)\n", err);
+ return err;
+ }
+
+ err = wdt87xx_send_command(client, VND_SET_CHECKSUM_CALC, address);
+ if (err) {
+ dev_err(&client->dev, "calc checksum fail (%d)\n", err);
+ return err;
+ }
+
+ time_delay = (length + 1023) / 1024;
+ /* to wait the operation compeletion */
+ msleep(time_delay * 10);
+
+ cmd_data.defined_data.report_id = VND_REQ_READ;
+ cmd_data.defined_data.type = VND_GET_CHECKSUM;
+ cmd_data.defined_data.index = 0;
+ cmd_data.defined_data.length = 0;
+
+ err = wdt87xx_set_feature(client, cmd_data.buffer, 8);
+ if (err) {
+ dev_err(&client->dev, "checksum set read fail (%d)\n", err);
+ return err;
+ }
+
+ memset(req_data.buffer, 0, 64);
+ req_data.defined_data.report_id = VND_READ_DATA;
+ err = wdt87xx_get_feature(client, req_data.buffer, 64);
+ if (err) {
+ dev_err(&client->dev, "read checksum fail (%d)\n", err);
+ return err;
+ }
+
+ *checksum = (req_data.buffer[9] << 8) | (req_data.buffer[8]);
+
+ return err;
+}
+
+static unsigned short fw_checksum(const unsigned char *data,
+ unsigned int length)
+{
+ unsigned int i;
+ unsigned short checksum = 0;
+
+ checksum = 0x0000;
+
+ for (i = 0; i < length; i++)
+ checksum = misr(checksum, data[i]);
+
+ return checksum;
+}
+
+static int wdt87xx_write_firmware(struct i2c_client *client,
+ struct chunk_info_ex_st *chunk_info_ex, int type)
+{
+ struct wdt87xx_ts_data *dev_wdt87xx = i2c_get_clientdata(client);
+ int err = 0;
+ int err1 = 0;
+ int size;
+ int start_addr = 0;
+ int page_size;
+ int retry_count = 0;
+ int is_equal = 0;
+ int max_retries;
+ unsigned int calc_checksum = 0;
+ unsigned int read_checksum = 0;
+ const char *data;
+
+ dev_info(&client->dev, "start 4k page program\n");
+
+ err = wdt87xx_send_command(client, VND_CMD_STOP, MODE_STOP);
+ if (err) {
+ dev_err(&client->dev, "command stop fail (%d)\n", err);
+ return err;
+ }
+
+ err = wdt87xx_send_command(client, VND_CMD_SFUNL, 0);
+ if (err) {
+ dev_err(&client->dev, "command sfunl fail (%d)\n", err);
+ goto write_fail;
+ }
+
+ mdelay(10);
+
+ start_addr = chunk_info_ex->chunk_info.target_start_addr;
+ size = chunk_info_ex->chunk_info.length;
+ data = chunk_info_ex->data;
+
+ max_retries = dev_wdt87xx->max_retries;
+
+ dev_info(&client->dev, "%x, %x, %d\n", start_addr, size, max_retries);
+
+ while (size && !err) {
+ is_equal = 0;
+ if (size > PG_SIZE) {
+ page_size = PG_SIZE;
+ size = size - PG_SIZE;
+ } else {
+ page_size = size;
+ size = 0;
+ }
+
+ for (retry_count = 0; retry_count < max_retries && !is_equal;
+ retry_count++) {
+ err = wdt87xx_send_command(client, VND_CMD_ERASE,
+ start_addr);
+ if (err) {
+ dev_err(&client->dev, "erase fail (%d)\n",
+ err);
+ break;
+ }
+
+ msleep(50);
+
+ err = wdt87xx_write_data(client, data, start_addr,
+ page_size);
+ if (err) {
+ dev_err(&client->dev, "write data fail (%d)\n",
+ err);
+ break;
+ }
+
+ read_checksum = 0;
+ err = wdt87xx_get_checksum(client, &read_checksum,
+ start_addr, page_size);
+ if (err)
+ break;
+
+ calc_checksum = fw_checksum(data, page_size);
+
+ if (read_checksum == calc_checksum)
+ is_equal = 1;
+ else {
+ dev_err(&client->dev, "checksum fail: (%d)",
+ retry_count);
+ dev_err(&client->dev, ",(%d), (%d)\n",
+ read_checksum, calc_checksum);
+ }
+ }
+
+ if (retry_count == MAX_RETRIES) {
+ dev_err(&client->dev, "write page fail\n");
+ err = -EIO;
+ }
+
+ start_addr = start_addr + page_size;
+ data = data + page_size;
+ dev_info(&client->dev, "%x, %x\n", start_addr, size);
+ }
+write_fail:
+ err1 = wdt87xx_send_command(client, VND_CMD_SFLCK, 0);
+ if (err1)
+ dev_err(&client->dev, "command sflck fail (%d)\n", err1);
+
+ mdelay(10);
+
+ err1 = wdt87xx_send_command(client, VND_CMD_START, 0);
+ if (err1)
+ dev_err(&client->dev, "command start fail (%d)\n", err1);
+
+ dev_info(&client->dev, "stop 4k page program : ");
+
+ if (err || err1)
+ dev_info(&client->dev, "fail\n");
+ else
+ dev_info(&client->dev, "pass\n");
+
+ if (err1)
+ return err1;
+
+ return err;
+}
+
+static int wdt87xx_sw_reset(struct i2c_client *client)
+{
+ int err = 0;
+
+ dev_info(&client->dev, "reset device now\n");
+
+ err = wdt87xx_send_command(client, VND_CMD_RESET, 0);
+ if (err) {
+ dev_err(&client->dev, "command reset fail (%d)\n", err);
+ return err;
+ }
+
+ msleep(100);
+
+ return 0;
+}
+
+static int wdt87xx_load_chunk(struct i2c_client *client,
+ const struct firmware *fw,
+ struct format_chunk_st *format_chunk, unsigned int ck_id)
+{
+ int err = 0;
+ struct chunk_info_ex_st chunk_info_ex;
+
+ err = get_chunk_info(fw, ck_id, &chunk_info_ex, format_chunk);
+ if (err) {
+ dev_err(&client->dev, "can not get the fw !\n");
+ goto failed;
+ }
+
+ /* Check for incorrect bin file */
+ err = wdt87xx_check_firmware(&chunk_info_ex, ck_id);
+ if (err) {
+ dev_err(&client->dev, "invalid chunk : (%d)\n", ck_id);
+ goto failed;
+ }
+
+ err = wdt87xx_write_firmware(client, &chunk_info_ex, ck_id);
+ if (err)
+ dev_err(&client->dev, "write firmware failed : (%d)\n",
+ ck_id);
+
+failed:
+ return err;
+}
+
+static int wdt87xx_load_fw(struct device *dev, const char *fn, int type)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ const struct firmware *fw = 0;
+ int err = 0;
+ struct format_chunk_st format_chunk;
+
+ err = request_firmware(&fw, fn, dev);
+ if (err) {
+ dev_err(&client->dev, "unable to open firmware %s\n", fn);
+ return err;
+ }
+
+ disable_irq(client->irq);
+
+ err = process_fw_data(client, fw, &format_chunk);
+ if (err) {
+ dev_err(&client->dev, "bad fw file !\n");
+ goto release_firmware;
+ }
+
+ if (type & WDT87XX_FW) {
+ err = wdt87xx_load_chunk(client, fw, &format_chunk,
+ CHUNK_ID_FRWR);
+ if (err) {
+ dev_err(&client->dev, "load fw chunk failed !\n");
+ goto release_firmware;
+ }
+ }
+
+ if (type & WDT87XX_CFG) {
+ err = wdt87xx_load_chunk(client, fw, &format_chunk,
+ CHUNK_ID_CNFG);
+ if (err) {
+ dev_err(&client->dev, "load cfg chunk failed !\n");
+ goto release_firmware;
+ }
+ }
+
+ err = wdt87xx_sw_reset(client);
+
+ if (err)
+ dev_err(&client->dev, "software reset failed !\n");
+
+release_firmware:
+ enable_irq(client->irq);
+
+ mdelay(10);
+ release_firmware(fw);
+ return err;
+}
+
+static ssize_t wdt87xx_update_fw(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct wdt87xx_ts_data *dev_wdt87xx = i2c_get_clientdata(client);
+ int err = 0;
+ int option = 0;
+
+ if (count > 0)
+ option = buf[0] - '0';
+
+ dev_info(dev, "update option (%d)\n", option);
+ if (option < 1 || option > 3) {
+ dev_err(&client->dev, "option is not supported\n");
+ return -1;
+ }
+
+ err = mutex_lock_interruptible(&dev_wdt87xx->sysfs_mutex);
+ if (err)
+ return err;
+
+ err = wdt87xx_load_fw(dev, WDT87XX_FW_NAME, option);
+ if (err) {
+ dev_err(&client->dev, "the firmware update failed(%d)\n",
+ err);
+ count = err;
+ }
+
+ mutex_unlock(&dev_wdt87xx->sysfs_mutex);
+
+ return count;
+}
+
+static ssize_t wdt87xx_max_retries(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct wdt87xx_ts_data *dev_wdt87xx = i2c_get_clientdata(client);
+
+ int option = 0;
+
+ if (count > 0)
+ option = buf[0] - '0';
+
+ dev_wdt87xx->max_retries = option;
+ dev_info(dev, "max retries (%d)\n", option);
+
+ return count;
+}
+
+static ssize_t wdt87xx_show_info(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct wdt87xx_ts_data *dev_wdt87xx = i2c_get_clientdata(client);
+ struct sys_param_st *sys_param = &dev_wdt87xx->sys_param;
+
+ wdt87xx_get_sysparam(client, dev_wdt87xx);
+
+ return scnprintf(buf, PAGE_SIZE, "%x,%x,%4x,%4x\n", sys_param->fw_id,
+ sys_param->plat_id, sys_param->xmls_id1,
+ sys_param->xmls_id2);
+}
+
+static DEVICE_ATTR(update_fw, S_IWUSR, NULL, wdt87xx_update_fw);
+static DEVICE_ATTR(max_retries, S_IWUSR, NULL, wdt87xx_max_retries);
+static DEVICE_ATTR(show_info, S_IRUGO, wdt87xx_show_info, NULL);
+
+static struct attribute *wdt87xx_attrs[] = {
+ &dev_attr_update_fw.attr,
+ &dev_attr_max_retries.attr,
+ &dev_attr_show_info.attr,
+ NULL
+};
+
+static const struct attribute_group wdt87xx_attr_group = {
+ .attrs = wdt87xx_attrs,
+};
+
+static int wdt87xx_i2c_txrxdata(struct i2c_client *client, char *txdata,
+ int txlen, char *rxdata, int rxlen)
+{
+ int err = 0;
+
+ struct i2c_msg msgs[] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = txlen,
+ .buf = txdata,
+ },
+ {
+ .addr = client->addr,
+ .flags = I2C_M_RD,
+ .len = rxlen,
+ .buf = rxdata,
+ },
+ };
+
+ err = i2c_transfer(client->adapter, msgs, 2);
+
+ if (err < 0)
+ dev_err(&client->dev, "%s: i2c read error (%d)\n",
+ __func__, err);
+
+ return err;
+}
+
+static int wdt87xx_i2c_rxdata(struct i2c_client *client, char *rxdata,
+ int length)
+{
+ int err = 0;
+
+ struct i2c_msg msgs[] = {
+ {
+ .addr = client->addr,
+ .flags = I2C_M_RD,
+ .len = length,
+ .buf = rxdata,
+ },
+ };
+
+ err = i2c_transfer(client->adapter, msgs, 1);
+
+ if (err < 0)
+ dev_err(&client->dev, "%s: i2c read error (%d)\n",
+ __func__, err);
+
+ return err;
+}
+
+static int wdt87xx_i2c_txdata(struct i2c_client *client, char *txdata,
+ int length)
+{
+ int err = 0;
+
+ struct i2c_msg msg[] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = length,
+ .buf = txdata,
+ },
+ };
+
+ err = i2c_transfer(client->adapter, msg, 1);
+ if (err < 0)
+ dev_err(&client->dev, "%s: i2c write error (%d)\n",
+ __func__, err);
+
+ return err;
+}
+
+static void wdt87xx_ts_handle_irq(struct wdt87xx_ts_data *data)
+{
+ struct wdt87xx_ts_data *dev_wdt87xx = data;
+ int err = 0;
+ int i, points;
+ struct i2c_client *client = dev_wdt87xx->client;
+ struct wdt_touch_events_st *ptr_touch_event = 0;
+ u8 raw_buf[64] = {0};
+
+ static u8 points_last_flag[WDT_MAX_POINT<<1] = {0};
+
+ err = wdt87xx_i2c_rxdata(client, raw_buf, WDT_RAW_BUF_COUNT);
+
+ if (err < 0) {
+ dev_err(&client->dev, "read raw data fail (%d)\n", err);
+ return;
+ }
+
+ /* touch finger count */
+ points = raw_buf[53];
+
+ dev_dbg(&client->dev, "point: (%d)\n", points);
+
+ if (points == 0) {
+ for (i = 0; i < WDT_MAX_POINT; i++) {
+ /* force to send event of tip off */
+ if (points_last_flag[i] != 0) {
+ dev_dbg(&client->dev, "tip off (%d)\n", i);
+ input_mt_slot(dev_wdt87xx->input_dev, i);
+ input_mt_report_slot_state(
+ dev_wdt87xx->input_dev,
+ MT_TOOL_FINGER, false);
+ }
+ }
+
+ memset(points_last_flag, 0, sizeof(points_last_flag));
+
+ input_sync(dev_wdt87xx->input_dev);
+ return;
+ }
+
+ ptr_touch_event = (struct wdt_touch_events_st *) raw_buf;
+
+ dev_dbg(&client->dev, "+++++++++\n");
+
+ for (i = 0; i < WDT_MAX_POINT; i++) {
+ int point_id = (ptr_touch_event->touch_event[i].id >> 3) - 1;
+
+ if (point_id < 0)
+ continue;
+
+ /* tip off */
+ if (((ptr_touch_event->touch_event[i].id & 0x1) == 0) &&
+ (points_last_flag[point_id] != 0)) {
+ dev_dbg(&client->dev, "tip on (%d)\n", point_id);
+ input_mt_slot(dev_wdt87xx->input_dev, point_id);
+ input_mt_report_slot_state(dev_wdt87xx->input_dev,
+ MT_TOOL_FINGER, false);
+ } else /* tip on */
+ if (ptr_touch_event->touch_event[i].id & 0x1) {
+ unsigned int point_x, point_y;
+
+ /* incorrect coordinate */
+ if (ptr_touch_event->touch_event[i].x > 0x7FFF ||
+ ptr_touch_event->touch_event[i].y > 0x7FFF)
+ continue;
+
+ point_x = ptr_touch_event->touch_event[i].x;
+ point_y = ptr_touch_event->touch_event[i].y;
+
+ dev_dbg(&client->dev, "tip on (%d), x(%d), y(%d)\n",
+ i, point_x, point_y);
+
+ input_mt_slot(dev_wdt87xx->input_dev, point_id);
+ input_mt_report_slot_state(dev_wdt87xx->input_dev,
+ MT_TOOL_FINGER, true);
+ input_report_abs(dev_wdt87xx->input_dev,
+ ABS_MT_TOUCH_MAJOR, 1);
+ input_report_abs(dev_wdt87xx->input_dev,
+ ABS_MT_POSITION_X, point_x);
+ input_report_abs(dev_wdt87xx->input_dev,
+ ABS_MT_POSITION_Y, point_y);
+ }
+ points_last_flag[point_id] =
+ (ptr_touch_event->touch_event[i].id & 0x1);
+ }
+
+ input_sync(dev_wdt87xx->input_dev);
+}
+
+static irqreturn_t wdt87xx_ts_interrupt(int irq, void *dev_id)
+{
+ struct wdt87xx_ts_data *dev_wdt87xx =
+ (struct wdt87xx_ts_data *) dev_id;
+
+ wdt87xx_ts_handle_irq(dev_wdt87xx);
+
+ return IRQ_HANDLED;
+}
+
+static int wdt87xx_ts_request_irq(struct i2c_client *client)
+{
+ int err = 0;
+ struct wdt87xx_ts_data *dev_wdt87xx;
+
+ dev_wdt87xx = (struct wdt87xx_ts_data *) i2c_get_clientdata(client);
+
+/*
+ * once using the ACPI, we shall get the irq number from the client
+ * if it is not in the ACPI, we shall get a irq number from the gpio
+ */
+#ifndef CONFIG_ACPI
+ client->irq = 0;
+
+ /* request a selected gpio */
+ err = gpio_request(DINT_GPIO_NUM, "GPIO DINT");
+ if (err < 0) {
+ dev_err(&client->dev, "%s: request gpio fail (%d)\n",
+ __func__, err);
+ return -EINVAL;
+ }
+
+ /* request a irq no */
+ client->irq = gpio_to_irq(DINT_GPIO_NUM);
+ if (client->irq < 0) {
+ dev_err(&client->dev, "%s: request irq fail (%d)\n",
+ __func__, client->irq);
+ return -EINVAL;
+ }
+
+ gpio_direction_input(DINT_GPIO_NUM);
+ gpio_set_value(DINT_GPIO_NUM, 1);
+#endif
+
+ irq_set_irq_type(client->irq, IRQ_TYPE_EDGE_FALLING);
+
+ err = request_threaded_irq(client->irq, NULL, wdt87xx_ts_interrupt,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ client->name, dev_wdt87xx);
+
+ if (err < 0) {
+ dev_err(&client->dev, "%s: request threaded irq fail (%d)\n",
+ __func__, err);
+ return err;
+ }
+
+ disable_irq_nosync(client->irq);
+
+ return 0;
+}
+
+static int wdt87xx_ts_create_input_device(struct i2c_client *client)
+{
+ int err = 0;
+ struct wdt87xx_ts_data *dev_wdt87xx;
+ struct input_dev *input_dev;
+
+ dev_wdt87xx = (struct wdt87xx_ts_data *) i2c_get_clientdata(client);
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ dev_err(&client->dev, "%s: failed to allocate input device\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ dev_wdt87xx->input_dev = input_dev;
+
+ input_dev->name = "WDT87xx Touchscreen";
+ input_dev->id.bustype = BUS_I2C;
+
+ __set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
+
+ /* for single touch */
+ set_bit(ABS_X, input_dev->absbit);
+ set_bit(ABS_Y, input_dev->absbit);
+ input_set_abs_params(input_dev, ABS_X, 0, SCREEN_LOGICAL_MAX_X, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, SCREEN_LOGICAL_MAX_Y, 0, 0);
+
+ input_mt_init_slots(input_dev, WDT_MAX_POINT, INPUT_MT_DIRECT);
+
+ set_bit(ABS_MT_TOUCH_MAJOR, input_dev->absbit);
+ set_bit(ABS_MT_POSITION_X, input_dev->absbit);
+ set_bit(ABS_MT_POSITION_Y, input_dev->absbit);
+ set_bit(ABS_MT_WIDTH_MAJOR, input_dev->absbit);
+
+ input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
+ SCREEN_LOGICAL_MAX_X, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
+ SCREEN_LOGICAL_MAX_Y, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 0xFF, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, 200, 0, 0);
+
+ set_bit(ABS_PRESSURE, input_dev->absbit);
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xFF, 0, 0);
+
+ input_set_abs_params(input_dev, ABS_MT_TRACKING_ID, 0,
+ WDT_MAX_POINT, 0, 0);
+
+ set_bit(EV_ABS, input_dev->evbit);
+ set_bit(EV_SYN, input_dev->evbit);
+
+ err = input_register_device(input_dev);
+ if (err) {
+ dev_err(&client->dev, "register input device fail (%d)\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int wdt87xx_ts_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct wdt87xx_ts_data *dev_wdt87xx;
+ int err = 0;
+
+ dev_dbg(&client->dev, "wdt87xx : adapter=(%d), client irq:(%d)\n",
+ client->adapter->nr, client->irq);
+
+ /* check if the I2C function is ok in this adaptor */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ err = -ENODEV;
+ goto exit_check_functionality_fail;
+ }
+
+ dev_dbg(&client->dev, "kzalloc\n");
+ dev_wdt87xx = (struct wdt87xx_ts_data *)
+ kzalloc(sizeof(struct wdt87xx_ts_data), GFP_KERNEL);
+ if (!dev_wdt87xx) {
+ err = -ENOMEM;
+ goto exit_alloc_data_fail;
+ }
+
+ dev_dbg(&client->dev, "i2c_set_clientdata\n");
+
+ dev_wdt87xx->client = client;
+ mutex_init(&dev_wdt87xx->sysfs_mutex);
+ i2c_set_clientdata(client, dev_wdt87xx);
+ dev_wdt87xx->max_retries = MAX_RETRIES;
+
+ dev_dbg(&client->dev, "wdt87xx_ts_request_irq\n");
+ err = wdt87xx_ts_request_irq(client);
+ if (err < 0) {
+ dev_err(&client->dev, "request irq fail (%d)\n", err);
+ goto exit_gpio_request_fail;
+ }
+
+ dev_dbg(&client->dev, "wdt87xx_ts_create_input_device\n");
+ err = wdt87xx_ts_create_input_device(client);
+ if (err < 0) {
+ dev_err(&client->dev, "create input device fail (%d)\n", err);
+ goto exit_input_register_device_fail;
+ }
+
+ dev_dbg(&client->dev, "sysfs_create_group\n");
+ err = sysfs_create_group(&client->dev.kobj, &wdt87xx_attr_group);
+ if (err) {
+ dev_err(&client->dev, "create sysfs fail (%d)\n", err);
+ goto err_free_object;
+ }
+
+ enable_irq(client->irq);
+
+ dev_dbg(&client->dev, "%s leave\n", __func__);
+
+ return 0;
+
+err_free_object:
+exit_input_register_device_fail:
+ input_free_device(dev_wdt87xx->input_dev);
+
+
+exit_gpio_request_fail:
+#ifndef CONFIG_ACPI
+ gpio_free(DINT_GPIO_NUM);
+#endif
+ if (client->irq)
+ free_irq(client->irq, dev_wdt87xx);
+
+ i2c_set_clientdata(client, NULL);
+
+ kfree(dev_wdt87xx);
+exit_alloc_data_fail:
+exit_check_functionality_fail:
+
+ return err;
+}
+
+static int wdt87xx_ts_remove(struct i2c_client *client)
+{
+ struct wdt87xx_ts_data *dev_wdt87xx =
+ (struct wdt87xx_ts_data *) i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "==%s==\n", __func__);
+
+ sysfs_remove_group(&client->dev.kobj, &wdt87xx_attr_group);
+
+ input_unregister_device(dev_wdt87xx->input_dev);
+ input_free_device(dev_wdt87xx->input_dev);
+
+#ifndef CONFIG_ACPI
+ gpio_free(DINT_GPIO_NUM);
+#endif
+
+ if (client->irq)
+ free_irq(client->irq, dev_wdt87xx);
+
+ i2c_set_clientdata(client, NULL);
+ kfree(dev_wdt87xx);
+
+ return 0;
+}
+
+static int __maybe_unused wdt87xx_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int err = 0;
+
+ dev_dbg(&client->dev, "enter %s\n", __func__);
+
+ disable_irq(client->irq);
+
+ err = wdt87xx_send_command(client, VND_CMD_STOP, MODE_IDLE);
+ if (err)
+ dev_err(&client->dev, "%s: command stop fail (%d)\n",
+ __func__, err);
+
+ return err;
+}
+
+static int __maybe_unused wdt87xx_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int err = 0;
+
+ /* once the chip is reset before resume, */
+ /* we need some time to wait it is stable */
+ mdelay(100);
+
+ err = wdt87xx_send_command(client, VND_CMD_START, 0);
+ if (err)
+ dev_err(&client->dev, "%s: command start fail (%d)\n",
+ __func__, err);
+
+ enable_irq(client->irq);
+
+ dev_dbg(&client->dev, "leave %s\n", __func__);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(wdt87xx_pm_ops, wdt87xx_suspend, wdt87xx_resume);
+
+static const struct i2c_device_id wdt87xx_dev_id[] = {
+ { WDT87XX_NAME, 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, wdt87xx_dev_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id wdt87xx_acpi_id[] = {
+ { "WDHT0001", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(acpi, wdt87xx_acpi_id);
+#endif
+
+static struct i2c_driver wdt87xx_driver = {
+ .probe = wdt87xx_ts_probe,
+ .remove = wdt87xx_ts_remove,
+ .id_table = wdt87xx_dev_id,
+ .driver = {
+ .name = WDT87XX_NAME,
+ .owner = THIS_MODULE,
+ .pm = &wdt87xx_pm_ops,
+#ifdef CONFIG_ACPI
+ .acpi_match_table = ACPI_PTR(wdt87xx_acpi_id),
+#endif
+ },
+};
+
+module_i2c_driver(wdt87xx_driver);
+
+MODULE_AUTHOR("HN Chen <hn.chen@...dahitech.com>");
+MODULE_DESCRIPTION("WeidaHiTech WDT87XX Touchscreen driver");
+MODULE_VERSION(WDT87XX_DRV_VER);
+MODULE_LICENSE("GPL");
+
--
1.9.1
--
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