From patchwork Fri May 29 04:27:29 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: HungNien Chen X-Patchwork-Id: 6504241 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 48AEFC0020 for ; Fri, 29 May 2015 04:27:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BA8D420558 for ; Fri, 29 May 2015 04:27:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A93820557 for ; Fri, 29 May 2015 04:27:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755176AbbE2E1W (ORCPT ); Fri, 29 May 2015 00:27:22 -0400 Received: from ml01.weidahitech.com ([61.222.87.235]:1547 "EHLO ml01.weidahitech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750873AbbE2E1U (ORCPT ); Fri, 29 May 2015 00:27:20 -0400 Received: from mail01.advancedsilicon.com.tw (mail01.wht.local [192.168.10.15]) by ml01.weidahitech.com (8.13.8/8.13.8) with ESMTP id t4T4Qtl8013099; Fri, 29 May 2015 12:26:55 +0800 Received: from localhost.localdomain ([192.168.10.88]) by mail01.advancedsilicon.com.tw with Microsoft SMTPSVC(6.0.3790.4675); Fri, 29 May 2015 12:26:56 +0800 From: HungNien Chen To: linux-input@vger.kernel.org Cc: linux-kernel@vger.kernel.org, dmitry.torokhov@gmail.com, HungNien Chen Subject: [PATCH v5] Fix the resolution issue in ChromeOS Date: Fri, 29 May 2015 12:27:29 +0800 Message-Id: <1432873649-32484-1-git-send-email-hn.chen@weidahitech.com> X-Mailer: git-send-email 1.9.1 X-OriginalArrivalTime: 29 May 2015 04:26:56.0550 (UTC) FILETIME=[B2781460:01D099C7] Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: HungNien Chen Signed-off-by: ... --- 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 + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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; + +/* 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; + 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); + 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]); + 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; + 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); + + 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); + + input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); + 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"); + + 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 "); +MODULE_DESCRIPTION("WeidaHiTech WDT87XX Touchscreen driver"); +MODULE_VERSION(WDT87XX_DRV_VER); +MODULE_LICENSE("GPL"); +