| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sun, 7 Jun 2015 22:56:29 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: HungNien Chen <hn.chen@...dahitech.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5] Fix the resolution issue in ChromeOS
Hi Hn,
On Fri, May 29, 2015 at 12:27:29PM +0800, HungNien Chen wrote:
> Signed-off-by: HungNien Chen <hn.chen@...dahitech.com>
Thank you for making changes, I have some more comments. By the way,
have you tried running scripts/checkpatch.pl over your patch? It often
picks up some common issues.
> ---
> drivers/input/touchscreen/Kconfig | 12 +
> drivers/input/touchscreen/Makefile | 1 +
> drivers/input/touchscreen/wdt87xx_i2c.c | 1404 +++++++++++++++++++++++++++++++
> 3 files changed, 1417 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..4998ad5
> --- /dev/null
> +++ b/drivers/input/touchscreen/wdt87xx_i2c.c
> @@ -0,0 +1,1404 @@
> +/*
> + * Weida HiTech WDT87xx TouchScreen I2C driver
> + *
> + * Copyright (c) 2015 Weida HiTech Ltd.
> + * HN Chen <hn.chen@...dahitech.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License, 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>
Yo do not need version.h
> +#include <linux/i2c.h>
> +#include <linux/input.h>
> +#include <linux/interrupt.h>
> +#include <linux/delay.h>
> +#include <linux/gpio.h>
I do not think you need gpio.h
> +#include <linux/irq.h>
> +#include <linux/ioc4.h>
I do not see why you'd need this.
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/proc_fs.h>
Not needed it seems.
> +#include <linux/slab.h>
> +#include <linux/firmware.h>
> +#include <linux/gpio.h>
And definitely not the 2nd copy ;)
> +#include <linux/input/mt.h>
> +#include <asm/unaligned.h>
Please arrange asm/ includes after linux/ ones.
> +#include <linux/acpi.h>
> +
> +#define WDT87XX_NAME "wdt87xx_i2c"
> +#define WDT87XX_DRV_VER "0.9.4"
> +#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_PKT_V0 0
> +#define WDT_PKT_V1 1
> +
> +#define WDT_MAX_FINGER 10
> +#define WDT_RAW_BUF_COUNT 54
> +#define WDT_V1_RAW_BUF_COUNT 74
> +#define WDT_FIRMWARE_ID 0xa9e368f5
> +
> +#define PG_SIZE 0x1000
> +#define MAX_RETRIES 3
> +
> +#define MAX_UNIT_AXIS 0x7FFF
> +
> +#define PKT_READ_SIZE 72
> +#define PKT_WRITE_SIZE 80
> +
> +/* the definition for one finger */
> +#define FINGER_EV_OFFSET_ID 0
> +#define FINGER_EV_OFFSET_X 1
> +#define FINGER_EV_OFFSET_Y 3
> +#define FINGER_EV_SIZE 5
> +
> +#define FINGER_EV_V1_OFFSET_ID 0
> +#define FINGER_EV_V1_OFFSET_W 1
> +#define FINGER_EV_V1_OFFSET_H 2
> +#define FINGER_EV_V1_OFFSET_X 3
> +#define FINGER_EV_V1_OFFSET_Y 5
> +#define FINGER_EV_V1_SIZE 7
> +
> +/* the definition for a packet */
> +#define TOUCH_PK_OFFSET_REPORT_ID 0
> +#define TOUCH_PK_OFFSET_EVENT 1
> +#define TOUCH_PK_OFFSET_SCAN_TIME 51
> +#define TOUCH_PK_OFFSET_FNGR_NUM 53
> +
> +#define TOUCH_PK_V1_OFFSET_REPORT_ID 0
> +#define TOUCH_PK_V1_OFFSET_EVENT 1
> +#define TOUCH_PK_V1_OFFSET_SCAN_TIME 71
> +#define TOUCH_PK_V1_OFFSET_FNGR_NUM 73
> +
> +/* the definition for the controller parameters */
> +#define CTL_PARAM_OFFSET_FW_ID 0
> +#define CTL_PARAM_OFFSET_PLAT_ID 2
> +#define CTL_PARAM_OFFSET_XMLS_ID1 4
> +#define CTL_PARAM_OFFSET_XMLS_ID2 6
> +#define CTL_PARAM_OFFSET_PHY_CH_X 8
> +#define CTL_PARAM_OFFSET_PHY_CH_Y 10
> +#define CTL_PARAM_OFFSET_PHY_X0 12
> +#define CTL_PARAM_OFFSET_PHY_X1 14
> +#define CTL_PARAM_OFFSET_PHY_Y0 16
> +#define CTL_PARAM_OFFSET_PHY_Y1 18
> +#define CTL_PARAM_OFFSET_PHY_W 22
> +#define CTL_PARAM_OFFSET_PHY_H 24
> +
> +struct sys_param {
> + u16 fw_id;
> + u16 plat_id;
> + u16 xmls_id1;
> + u16 xmls_id2;
> + u16 phy_ch_x;
> + u16 phy_ch_y;
> + u16 phy_w;
> + u16 phy_h;
> +} __packed;
You are not using this structure to represent the on-wire format so it
does not need to be 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;
> + u32 max_retries;
Why do we need this as a parameter in wdt87xx_ts_data instead of using
MAX_RETRIES constant directly?
> + struct sys_param param;
> + u8 phys[32];
> + u32 packet_type;
> + u32 max_x;
> + u32 max_y;
> +};
> +
> +/* 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 {
> + struct {
> + u8 report_id;
> + u8 type;
> + u16 index;
> + u32 length;
> + } defined_data;
> + u8 buffer[8];
> +};
> +
> +/* the definition of packet structure */
> +union req_data {
> + struct {
> + u8 report_id;
> + u8 type;
> + u16 index;
> + u32 length;
> + u8 data[PACKET_SIZE];
> + } defined_data;
> + u8 buffer[64];
> +};
> +
> +/* the definition of firmware data structure */
> +struct chunk_info {
> + u32 target_start_addr;
> + u32 length;
> + u32 source_start_addr;
> + u32 version_number;
> + u32 attribute;
> + u32 temp;
> +};
> +
> +struct chunk_data {
> + u32 ck_id;
> + u32 ck_size;
> + struct chunk_info chunk_info;
> + u8 *data;
> +};
> +
> +struct format_chunk {
> + u32 ck_id;
> + u32 ck_size;
> + u32 number_chunk;
> + u32 enable_flag;
> + u32 checksum;
> + u32 temp1;
> + u32 temp2;
> +};
> +
> +struct chunk_info_ex {
> + struct chunk_info chunk_info;
> + u8 *data;
> + u32 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 FOURCC_ID_FRMT
> +#define CHUNK_ID_FRWR FOURCC_ID_FRWR
> +#define CHUNK_ID_CNFG FOURCC_ID_CNFG
> +
> +
> +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, u8 *buf,
> + u32 buf_size);
> +static int wdt87xx_get_feature(struct i2c_client *client, u8 *buf,
> + u32 buf_size);
> +static int wdt87xx_get_string(struct i2c_client *client, u8 str_idx,
> + u8 *buf, u32 buf_size);
> +
> +static int get_chunk_info(const struct firmware *fw, u32 chunk_four_cc,
> + struct chunk_info_ex *fw_chunk_info,
> + struct format_chunk *wif_format_chunk)
> +{
> + const char *data;
> + u32 data_len;
> + bool is_found = 0;
> + u32 start_pos;
> + struct chunk_data chunk;
> + u32 ck_id, ck_size;
> +
> + data = fw->data;
> + data_len = fw->size;
> +
> + /* check if the chunk is existed */
> + start_pos = 12 + sizeof(struct format_chunk);
> +
> + while (start_pos < data_len && !is_found) {
> + ck_id = get_unaligned_le32(&data[start_pos]);
> + ck_size = get_unaligned_le32(&data[start_pos+4]);
> +
> + /* the chunk is found */
> + if (ck_id == chunk_four_cc) {
> + chunk.ck_id = ck_id;
> + chunk.ck_size = ck_size;
> +
> + chunk.data = (u8 *) &data[start_pos + 8
> + + sizeof(struct chunk_info)];
> + chunk.chunk_info.target_start_addr =
> + get_unaligned_le32(&data[start_pos+8]);
> + chunk.chunk_info.length =
> + get_unaligned_le32(&data[start_pos+12]);
> + chunk.chunk_info.source_start_addr =
> + get_unaligned_le32(&data[start_pos+16]);
> + chunk.chunk_info.version_number =
> + get_unaligned_le32(&data[start_pos+20]);
> + chunk.chunk_info.attribute =
> + get_unaligned_le32(&data[start_pos+24]);
> + chunk.chunk_info.temp =
> + get_unaligned_le32(&data[start_pos+28]);
> +
> + memcpy(&fw_chunk_info->chunk_info,
> + &chunk.chunk_info,
> + sizeof(struct chunk_info));
> + fw_chunk_info->length = chunk.chunk_info.length;
> + fw_chunk_info->data = chunk.data;
> +
> + is_found = 1;
> + } else
> + start_pos = start_pos + 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 wdt87xx_ts_data *) i2c_get_clientdata(client);
No need to cast.
> + struct sys_param *ctr_param = &dev_wdt87xx->param;
> + u8 buffer[PKT_READ_SIZE];
> + int err;
> +
> + err = wdt87xx_get_string(client, STRIDX_PARAMETERS, buffer, 32);
> + if (err) {
> + dev_err(&client->dev, "get parameters error (%d)\n", err);
> + return err;
> + }
> +
> + ctr_param->xmls_id1 =
> + get_unaligned_le16(buffer + CTL_PARAM_OFFSET_XMLS_ID1);
> + ctr_param->xmls_id2 =
> + get_unaligned_le16(buffer + CTL_PARAM_OFFSET_XMLS_ID2);
> + ctr_param->phy_ch_x =
> + get_unaligned_le16(buffer + CTL_PARAM_OFFSET_PHY_CH_X);
> + ctr_param->phy_ch_y =
> + get_unaligned_le16(buffer + CTL_PARAM_OFFSET_PHY_CH_Y);
> + ctr_param->phy_w =
> + (get_unaligned_le16(buffer + CTL_PARAM_OFFSET_PHY_W) / 10);
> + ctr_param->phy_h =
> + (get_unaligned_le16(buffer + CTL_PARAM_OFFSET_PHY_H) / 10);
> +
> + 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;
> + }
> +
> + ctr_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: %x\n", buffer[0]);
> + return -EINVAL;
> + }
> +
> + ctr_param->fw_id = get_unaligned_le16(&buffer[1]);
> +
> + if ((ctr_param->fw_id & 0xFFF) > 0x335)
> + dev_wdt87xx->packet_type = WDT_PKT_V1;
> + else
> + dev_wdt87xx->packet_type = WDT_PKT_V0;
> +
> + dev_dbg(&client->dev,
> + "fw_id: 0x%x, plat_id: 0x%x\nxml_id1: %4x, xml_id2: %4x\n",
> + ctr_param->fw_id, ctr_param->plat_id,
> + ctr_param->xmls_id1, ctr_param->xmls_id2);
> +
> + return 0;
> +}
> +
> +static int process_fw_data(struct i2c_client *client,
> + const struct firmware *fw, struct format_chunk *wif_format_chunk)
> +{
> + struct wdt87xx_ts_data *dev_wdt87xx = i2c_get_clientdata(client);
> + struct chunk_info_ex fw_chunk_info;
> + int err;
> + u32 *u32_data;
> + u32 length;
> + u8 fw_id;
> + u8 chip_id;
> + u32 data1, data2;
> +
> + u32_data = (u32 *) fw->data;
> + length = fw->size;
> +
> + data1 = get_unaligned_le32(&u32_data[0]);
Typically we treat such data as u8 an use byte offset, not dword
offset.
> + data2 = get_unaligned_le32(&u32_data[2]);
> + if (data1 != FOURCC_ID_RIFF || data2 != FOURCC_ID_WHIF) {
> + dev_err(&client->dev, "Check data tag failed !\n");
> + return -EINVAL;
> + }
> +
> + /* the length should be equal */
> + data1 = get_unaligned_le32(&u32_data[1]);
> + if (data1 != length) {
> + dev_err(&client->dev, "Check data length failed !\n");
> + return -EINVAL;
> + }
> +
> + wif_format_chunk->ck_id = get_unaligned_le32(&u32_data[3]);
> + wif_format_chunk->ck_size = get_unaligned_le32(&u32_data[4]);
> + wif_format_chunk->number_chunk = get_unaligned_le32(&u32_data[5]);
> + wif_format_chunk->enable_flag = get_unaligned_le32(&u32_data[6]);
> + wif_format_chunk->checksum = get_unaligned_le32(&u32_data[7]);
> + wif_format_chunk->temp1 = get_unaligned_le32(&u32_data[8]);
> + wif_format_chunk->temp2 = get_unaligned_le32(&u32_data[9]);
> +
> + dev_dbg(&client->dev, "version checking\n");
> +
> + /* get the version number from the firmware */
> + err = get_chunk_info(fw, CHUNK_ID_FRWR, &fw_chunk_info,
> + wif_format_chunk);
> + if (err) {
> + dev_err(&client->dev, "can not extract data !\n");
> + return -EBADR;
> + }
> +
> + fw_id = ((fw_chunk_info.chunk_info.version_number >> 12) & 0xF);
> + chip_id = (((dev_wdt87xx->param.fw_id) >> 12) & 0xF);
> +
> + if (fw_id != chip_id) {
> + dev_err(&client->dev, "FW is not match: 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 *fw_chunk_info,
> + int ck_id)
> +{
> + if (ck_id == CHUNK_ID_FRWR) {
> + u32 fw_id;
> +
> + fw_id = get_unaligned_le32(fw_chunk_info->data);
> + if (fw_id == WDT_FIRMWARE_ID)
> + return 0;
> + else
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int wdt87xx_set_feature(struct i2c_client *client, u8 *buf,
> + u32 buf_size)
> +{
> + int err;
> + union req_data *req_data_set = (union req_data *) buf;
> + int data_len = 0;
> + /* for set/get packets used */
> + u8 xfer_buffer[PKT_WRITE_SIZE];
> +
> + /* set feature command packet */
> + xfer_buffer[data_len++] = 0x22;
> + xfer_buffer[data_len++] = 0x00;
> + if (req_data_set->defined_data.report_id > 0xF) {
> + xfer_buffer[data_len++] = 0x30;
> + xfer_buffer[data_len++] = 0x03;
> + xfer_buffer[data_len++] = req_data_set->defined_data.report_id;
> + } else {
> + xfer_buffer[data_len++] = 0x30 |
> + req_data_set->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, u8 *buf,
> + u32 buf_size)
> +{
> + int err;
> + u8 tx_buffer[8];
> + u8 xfer_buffer[PKT_WRITE_SIZE];
> + union req_data *req_data_get = (union req_data *) buf;
> + int data_len = 0;
> + u32 xfer_length = 0;
> +
> + /* get feature command packet */
> + tx_buffer[data_len++] = 0x22;
> + tx_buffer[data_len++] = 0x00;
> + if (req_data_get->defined_data.report_id > 0xF) {
> + tx_buffer[data_len++] = 0x30;
> + tx_buffer[data_len++] = 0x02;
> + tx_buffer[data_len++] = req_data_get->defined_data.report_id;
> + } else {
> + tx_buffer[data_len++] = 0x30 |
> + req_data_get->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 = get_unaligned_le16(xfer_buffer);
> +
> + 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, u8 str_idx,
> + u8 *buf, u32 buf_size)
> +{
> + int err;
> + u8 tx_buffer[8] = { 0x22, 0x00, 0x13, 0x0E,
> + 0x00, 0x23, 0x00, 0x00 };
> + u8 xfer_buffer[PKT_WRITE_SIZE];
> + u32 xfer_length;
> +
> + 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 -EINVAL;
> + }
> +
> + 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 cmd_data_send;
> +
> + /* set the command packet */
> + cmd_data_send.defined_data.report_id = VND_REQ_WRITE;
> + cmd_data_send.defined_data.type = VND_SET_COMMAND_DATA;
> + put_unaligned_le16((u16) cmd,
> + &cmd_data_send.defined_data.index);
> +
> + switch (cmd) {
> + case VND_CMD_START:
> + case VND_CMD_STOP:
> + case VND_CMD_RESET:
> + /* mode selector */
> + put_unaligned_le32((value & 0xFF),
> + &cmd_data_send.defined_data.length);
> + break;
> + case VND_CMD_SFLCK:
> + put_unaligned_le16(0xC39B, &cmd_data_send.buffer[3]);
> + break;
> + case VND_CMD_SFUNL:
> + put_unaligned_le16(0x95DA, &cmd_data_send.buffer[3]);
> + break;
> + case VND_CMD_ERASE:
> + case VND_SET_CHECKSUM_CALC:
> + case VND_SET_CHECKSUM_LENGTH:
> + put_unaligned_le32(value, &cmd_data_send.buffer[3]);
> + break;
> + default:
> + cmd_data_send.defined_data.report_id = 0;
> + dev_err(&client->dev, "Invalid command: (%d)", cmd);
> + return -EINVAL;
> + }
> +
> + return wdt87xx_set_feature(client, &cmd_data_send.buffer[0],
> + sizeof(cmd_data_send));
> +}
> +
> +static int wdt87xx_write_data(struct i2c_client *client,
> + const char *data, u32 address, int length)
> +{
> + u32 addr_start, data_len;
> + u16 packet_size;
> + int count = 0;
> + int err;
> + union req_data req_data_set;
> + 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_set.defined_data.report_id = VND_REQ_WRITE;
> + req_data_set.defined_data.type = VND_SET_DATA;
> +
> + while (data_len) {
> + if (data_len < PACKET_SIZE)
> + packet_size = data_len;
> +
> + put_unaligned_le16(packet_size,
> + &req_data_set.defined_data.index);
> + put_unaligned_le32(addr_start,
> + &req_data_set.defined_data.length);
> +
> + memcpy(req_data_set.defined_data.data,
> + source_data, packet_size);
> +
> + err = wdt87xx_set_feature(client, req_data_set.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 u16 misr(u16 cur_value, u8 new_value)
> +{
> + u32 a, b;
> + u32 bit0;
> + u32 y;
> +
> + a = cur_value;
> + b = new_value;
> + 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 (u16) y;
> +}
> +
> +static int wdt87xx_get_checksum(struct i2c_client *client,
> + u32 *checksum, u32 address, int length)
> +{
> + int err;
> + int time_delay;
> + union req_data req_data_get;
> + union cmd_data cmd_data_get;
> +
> + 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_get.defined_data.report_id = VND_REQ_READ;
> + cmd_data_get.defined_data.type = VND_GET_CHECKSUM;
> + cmd_data_get.defined_data.index = 0;
> + cmd_data_get.defined_data.length = 0;
> +
> + err = wdt87xx_set_feature(client, cmd_data_get.buffer, 8);
> + if (err) {
> + dev_err(&client->dev, "checksum set read fail (%d)\n", err);
> + return err;
> + }
> +
> + memset(req_data_get.buffer, 0, 64);
> + req_data_get.defined_data.report_id = VND_READ_DATA;
> + err = wdt87xx_get_feature(client, req_data_get.buffer, 64);
> + if (err) {
> + dev_err(&client->dev, "read checksum fail (%d)\n", err);
> + return err;
> + }
> +
> + *checksum = get_unaligned_le16(&req_data_get.buffer[8]);
> +
> + return err;
> +}
> +
> +static u16 fw_checksum(const u8 *data, u32 length)
> +{
> + u32 i;
> + u16 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 *fw_chunk_info, int type)
> +{
> + struct wdt87xx_ts_data *dev_wdt87xx = i2c_get_clientdata(client);
> + int err;
> + int err1;
> + int size;
> + int start_addr;
> + int page_size;
> + int retry_count = 0;
> + int is_equal = 0;
> + int max_retries;
> + u32 calc_checksum = 0;
> + u32 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 = fw_chunk_info->chunk_info.target_start_addr;
> + size = fw_chunk_info->chunk_info.length;
> + data = fw_chunk_info->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,
> + "csum fail: (%d), (%d), (%d)\n",
> + retry_count,
> + 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;
> +
> + 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;
> + }
> +
> + /* wait the device to be ready */
> + msleep(200);
> +
> + return 0;
> +}
> +
> +static int wdt87xx_load_chunk(struct i2c_client *client,
> + const struct firmware *fw,
> + struct format_chunk *wif_format_chunk, u32 ck_id)
> +{
> + int err;
> + struct chunk_info_ex fw_chunk_info;
> +
> + err = get_chunk_info(fw, ck_id, &fw_chunk_info, wif_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(&fw_chunk_info, ck_id);
> + if (err) {
> + dev_err(&client->dev, "invalid chunk : (%d)\n", ck_id);
> + goto failed;
> + }
> +
> + err = wdt87xx_write_firmware(client, &fw_chunk_info, 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,
> + u8 type)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + const struct firmware *fw = 0;
> + int err;
> +
> + struct format_chunk wif_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, &wif_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, &wif_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, &wif_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");
> +
> + /* refresh the parameters */
> + wdt87xx_get_sysparam(client);
> +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;
> + u8 option = 0;
> +
> + if (count <= 0)
> + return -EINVAL;
> +
> + err = kstrtou8(buf, 0, &option);
> + if (err)
> + return err;
> +
> + 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_fw_version(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);
> +
> + return scnprintf(buf, PAGE_SIZE, "%x\n", dev_wdt87xx->param.fw_id);
> +}
> +
> +static ssize_t wdt87xx_plat_id(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);
> +
> + return scnprintf(buf, PAGE_SIZE, "%x\n", dev_wdt87xx->param.plat_id);
> +}
> +
> +static ssize_t wdt87xx_config_csum(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);
> + u32 cfg_csum;
> +
> + cfg_csum = dev_wdt87xx->param.xmls_id1;
> + cfg_csum = (cfg_csum << 16) | dev_wdt87xx->param.xmls_id2;
> +
> + return scnprintf(buf, PAGE_SIZE, "%x\n", cfg_csum);
> +}
> +
> +static DEVICE_ATTR(update_fw, S_IWUSR, NULL, wdt87xx_update_fw);
> +static DEVICE_ATTR(fw_version, S_IRUGO, wdt87xx_fw_version, NULL);
> +static DEVICE_ATTR(plat_id, S_IRUGO, wdt87xx_plat_id, NULL);
> +static DEVICE_ATTR(config_csum, S_IRUGO, wdt87xx_config_csum, NULL);
> +
> +static struct attribute *wdt87xx_attrs[] = {
> + &dev_attr_update_fw.attr,
> + &dev_attr_fw_version.attr,
> + &dev_attr_plat_id.attr,
> + &dev_attr_config_csum.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;
> +
> + 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 < 0 ? err : (err != ARRAY_SIZE(msgs) ? -EIO : 0);
> +}
> +
> +static int wdt87xx_i2c_rxdata(struct i2c_client *client,
> + char *rxdata, int length)
> +{
> + int err;
> +
> + err = i2c_master_recv(client, rxdata, length);
> +
> + 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;
> +
> + err = i2c_master_send(client, txdata, length);
> + if (err < 0)
> + dev_err(&client->dev, "%s: i2c write error (%d)\n",
> + __func__, err);
> +
> + return err;
> +}
> +
> +static irqreturn_t wdt87xx_ts_interrupt(int irq, void *dev_id)
> +{
> + struct wdt87xx_ts_data *dev_wdt87xx =
> + (struct wdt87xx_ts_data *) dev_id;
No need to cast.
> + int err;
> + int i, points;
> + struct i2c_client *client = dev_wdt87xx->client;
> + u8 raw_buf[WDT_V1_RAW_BUF_COUNT] = {0};
> + u8 *ptr_raw_buf = 0;
> +
> + err = wdt87xx_i2c_rxdata(client, raw_buf, WDT_V1_RAW_BUF_COUNT);
> +
> + if (err < 0) {
> + dev_err(&client->dev, "read v1 raw data fail (%d)\n", err);
> + goto irq_exit;
> + }
> +
> + /* touch finger count */
> + points = raw_buf[TOUCH_PK_V1_OFFSET_FNGR_NUM];
> +
> + dev_dbg(&client->dev, "point: (%d)\n", points);
> +
> + /* skip this packet */
> + if (points == 0)
> + goto irq_exit;
> +
> + dev_dbg(&client->dev, "+++++++++\n");
> +
> + ptr_raw_buf = &raw_buf[TOUCH_PK_V1_OFFSET_EVENT];
> + for (i = 0; i < WDT_MAX_FINGER; i++) {
> + int point_id = (*ptr_raw_buf >> 3) - 1;
> +
> + /* something wrong */
> + if (point_id < 0)
> + break;
> +
> + if (*ptr_raw_buf & 0x1) {
> + u32 point_x, point_y;
> + u8 w, h, p;
> + u16 value;
> +
> + w = *(ptr_raw_buf + FINGER_EV_V1_OFFSET_W);
> + h = *(ptr_raw_buf + FINGER_EV_V1_OFFSET_H);
> + value = w * h;
> + p = (value >> 2);
> +
> + point_x = get_unaligned_le16(ptr_raw_buf +
> + FINGER_EV_V1_OFFSET_X);
> + point_y = get_unaligned_le16(ptr_raw_buf +
> + FINGER_EV_V1_OFFSET_Y);
> +
> + point_y = DIV_ROUND_CLOSEST(point_y *
> + dev_wdt87xx->param.phy_h,
> + dev_wdt87xx->param.phy_w);
> +
> + /* incorrect coordinate */
> + if (point_x > dev_wdt87xx->max_x ||
> + point_y > dev_wdt87xx->max_y)
> + break;
> +
> + 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, 1);
> + input_report_abs(dev_wdt87xx->input_dev,
> + ABS_MT_TOUCH_MAJOR, w);
> + input_report_abs(dev_wdt87xx->input_dev,
> + ABS_MT_PRESSURE, p);
> + 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);
> + }
> + ptr_raw_buf += FINGER_EV_V1_SIZE;
> + }
> +
> + input_mt_sync_frame(dev_wdt87xx->input_dev);
> + input_sync(dev_wdt87xx->input_dev);
> +
> +irq_exit:
> + return IRQ_HANDLED;
> +}
> +
> +static int wdt87xx_ts_request_irq(struct i2c_client *client)
> +{
> + int err;
> + struct wdt87xx_ts_data *dev_wdt87xx;
> +
> + dev_wdt87xx = i2c_get_clientdata(client);
> +
> + err = devm_request_threaded_irq(&client->dev, client->irq, NULL,
> + wdt87xx_ts_interrupt, 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);
Why do you need to disable IRQ here just ti enable it again in probe()?
> +
> + return 0;
> +}
> +
> +static int wdt87xx_ts_create_input_device(struct i2c_client *client)
> +{
> + int err;
> + struct wdt87xx_ts_data *dev_wdt87xx;
> + struct input_dev *input_dev;
> + u32 resolution;
> +
> + dev_wdt87xx = (struct wdt87xx_ts_data *) i2c_get_clientdata(client);
> +
> + input_dev = devm_input_allocate_device(&client->dev);
> + if (!input_dev) {
> + dev_err(&client->dev, "%s: failed to allocate input device\n",
> + __func__);
> + return -ENOMEM;
> + }
> +
> + dev_wdt87xx->input_dev = input_dev;
> +
> + dev_wdt87xx->max_x = MAX_UNIT_AXIS;
> + dev_wdt87xx->max_y = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS *
> + dev_wdt87xx->param.phy_h, dev_wdt87xx->param.phy_w);
> +
> + resolution = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS, dev_wdt87xx->param.phy_w);
> +
> + input_dev->name = "WDT87xx Touchscreen";
> + input_dev->id.bustype = BUS_I2C;
> + input_dev->phys = dev_wdt87xx->phys;
> + input_dev->dev.parent = &dev_wdt87xx->client->dev;
> +
> + __set_bit(EV_ABS, input_dev->evbit);
> + __set_bit(EV_KEY, input_dev->evbit);
> + __set_bit(BTN_TOUCH, input_dev->keybit);
> +
> + /* for single touch */
> + input_set_abs_params(input_dev, ABS_X, 0, dev_wdt87xx->max_x, 0, 0);
> + input_set_abs_params(input_dev, ABS_Y, 0, dev_wdt87xx->max_y, 0, 0);
> + input_abs_set_res(input_dev, ABS_X, resolution);
> + input_abs_set_res(input_dev, ABS_Y, resolution);
> +
> + input_mt_init_slots(input_dev, WDT_MAX_FINGER,
> + INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
> +
> + input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
> + dev_wdt87xx->max_x, 0, 0);
> + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
> + dev_wdt87xx->max_y, 0, 0);
> + input_abs_set_res(input_dev, ABS_MT_POSITION_X, resolution);
> + input_abs_set_res(input_dev, ABS_MT_POSITION_Y, resolution);
Normally you initialize multitouch axis first and then use
input_mt_init_slots() which will copy them over into single-touch axis.
> +
> + input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
I do not see you emitting ABS_PRESSURE events so please drop this line.
> + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 0xFF, 0, 0);
> + input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 0xFF, 0, 0);
> +
> + 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;
> +
> + dev_info(&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))
> + return -ENODEV;
> +
> + dev_dbg(&client->dev, "kzalloc\n");
> + dev_wdt87xx = devm_kzalloc(&client->dev,
> + sizeof(struct wdt87xx_ts_data), GFP_KERNEL);
> + if (!dev_wdt87xx)
> + return -ENOMEM;
> +
> + dev_dbg(&client->dev, "i2c_set_clientdata\n");
I'd rather we cleaned these debug messages - they are sign of very early
driver development and usually not interesting to anyone once driver
matures.
> +
> + dev_wdt87xx->client = client;
> + mutex_init(&dev_wdt87xx->sysfs_mutex);
> + i2c_set_clientdata(client, dev_wdt87xx);
> + dev_wdt87xx->max_retries = MAX_RETRIES;
> + snprintf(dev_wdt87xx->phys, sizeof(dev_wdt87xx->phys),
> + "i2c-%u-%04x/input0", client->adapter->nr, client->addr);
> +
> + wdt87xx_get_sysparam(client);
> +
> + 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);
> + return err;
> + }
> +
> + 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);
> + return err;
> + }
> +
> + 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);
> + return err;
> + }
> + enable_irq(client->irq);
> + dev_dbg(&client->dev, "%s leave\n", __func__);
> +
> + return 0;
> +}
> +
> +static int wdt87xx_ts_remove(struct i2c_client *client)
> +{
> + dev_dbg(&client->dev, "==%s==\n", __func__);
> +
> + sysfs_remove_group(&client->dev.kobj, &wdt87xx_attr_group);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused wdt87xx_suspend(struct device *dev)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + int err;
> +
> + 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;
> +
> + /* 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);
> +
> +static const struct acpi_device_id wdt87xx_acpi_id[] = {
> + { "WDHT0001", 0 },
> + { }
> +};
> +
> +MODULE_DEVICE_TABLE(acpi, wdt87xx_acpi_id);
> +
> +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,
> + .acpi_match_table = ACPI_PTR(wdt87xx_acpi_id),
> + },
> +};
> +
> +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
>
Thanks.
--
Dmitry
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists