mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 15:26:42 +07:00
339d6b88e8
The original wait time was 200ms which was enough for the firmware to finish loading and boot. After that the firmware will perform initialization and touch calibration, which will take about 1.1 second. The touch calibration will change controller frequency to scan at the most optimal frequency and during calibration/frequency switching process we may run into i2c data errors. To avoid them we extend the sleep to 2500ms after issuing the sw reset. Signed-off-by: HungNien Chen <hn.chen@weidahitech.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
1195 lines
28 KiB
C
1195 lines
28 KiB
C
/*
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* Weida HiTech WDT87xx TouchScreen I2C driver
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*
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* Copyright (c) 2015 Weida Hi-Tech Co., Ltd.
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* HN Chen <hn.chen@weidahitech.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*/
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/firmware.h>
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#include <linux/input/mt.h>
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#include <linux/acpi.h>
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#include <asm/unaligned.h>
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#define WDT87XX_NAME "wdt87xx_i2c"
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#define WDT87XX_DRV_VER "0.9.7"
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#define WDT87XX_FW_NAME "wdt87xx_fw.bin"
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#define WDT87XX_CFG_NAME "wdt87xx_cfg.bin"
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#define MODE_ACTIVE 0x01
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#define MODE_READY 0x02
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#define MODE_IDLE 0x03
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#define MODE_SLEEP 0x04
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#define MODE_STOP 0xFF
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#define WDT_MAX_FINGER 10
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#define WDT_RAW_BUF_COUNT 54
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#define WDT_V1_RAW_BUF_COUNT 74
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#define WDT_FIRMWARE_ID 0xa9e368f5
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#define PG_SIZE 0x1000
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#define MAX_RETRIES 3
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#define MAX_UNIT_AXIS 0x7FFF
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#define PKT_READ_SIZE 72
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#define PKT_WRITE_SIZE 80
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/* the finger definition of the report event */
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#define FINGER_EV_OFFSET_ID 0
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#define FINGER_EV_OFFSET_X 1
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#define FINGER_EV_OFFSET_Y 3
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#define FINGER_EV_SIZE 5
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#define FINGER_EV_V1_OFFSET_ID 0
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#define FINGER_EV_V1_OFFSET_W 1
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#define FINGER_EV_V1_OFFSET_P 2
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#define FINGER_EV_V1_OFFSET_X 3
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#define FINGER_EV_V1_OFFSET_Y 5
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#define FINGER_EV_V1_SIZE 7
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/* The definition of a report packet */
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#define TOUCH_PK_OFFSET_REPORT_ID 0
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#define TOUCH_PK_OFFSET_EVENT 1
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#define TOUCH_PK_OFFSET_SCAN_TIME 51
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#define TOUCH_PK_OFFSET_FNGR_NUM 53
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#define TOUCH_PK_V1_OFFSET_REPORT_ID 0
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#define TOUCH_PK_V1_OFFSET_EVENT 1
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#define TOUCH_PK_V1_OFFSET_SCAN_TIME 71
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#define TOUCH_PK_V1_OFFSET_FNGR_NUM 73
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/* The definition of the controller parameters */
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#define CTL_PARAM_OFFSET_FW_ID 0
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#define CTL_PARAM_OFFSET_PLAT_ID 2
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#define CTL_PARAM_OFFSET_XMLS_ID1 4
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#define CTL_PARAM_OFFSET_XMLS_ID2 6
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#define CTL_PARAM_OFFSET_PHY_CH_X 8
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#define CTL_PARAM_OFFSET_PHY_CH_Y 10
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#define CTL_PARAM_OFFSET_PHY_X0 12
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#define CTL_PARAM_OFFSET_PHY_X1 14
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#define CTL_PARAM_OFFSET_PHY_Y0 16
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#define CTL_PARAM_OFFSET_PHY_Y1 18
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#define CTL_PARAM_OFFSET_PHY_W 22
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#define CTL_PARAM_OFFSET_PHY_H 24
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#define CTL_PARAM_OFFSET_FACTOR 32
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/* The definition of the device descriptor */
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#define WDT_GD_DEVICE 1
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#define DEV_DESC_OFFSET_VID 8
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#define DEV_DESC_OFFSET_PID 10
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/* Communication commands */
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#define PACKET_SIZE 56
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#define VND_REQ_READ 0x06
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#define VND_READ_DATA 0x07
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#define VND_REQ_WRITE 0x08
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#define VND_CMD_START 0x00
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#define VND_CMD_STOP 0x01
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#define VND_CMD_RESET 0x09
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#define VND_CMD_ERASE 0x1A
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#define VND_GET_CHECKSUM 0x66
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#define VND_SET_DATA 0x83
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#define VND_SET_COMMAND_DATA 0x84
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#define VND_SET_CHECKSUM_CALC 0x86
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#define VND_SET_CHECKSUM_LENGTH 0x87
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#define VND_CMD_SFLCK 0xFC
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#define VND_CMD_SFUNL 0xFD
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#define CMD_SFLCK_KEY 0xC39B
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#define CMD_SFUNL_KEY 0x95DA
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#define STRIDX_PLATFORM_ID 0x80
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#define STRIDX_PARAMETERS 0x81
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#define CMD_BUF_SIZE 8
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#define PKT_BUF_SIZE 64
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/* The definition of the command packet */
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#define CMD_REPORT_ID_OFFSET 0x0
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#define CMD_TYPE_OFFSET 0x1
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#define CMD_INDEX_OFFSET 0x2
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#define CMD_KEY_OFFSET 0x3
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#define CMD_LENGTH_OFFSET 0x4
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#define CMD_DATA_OFFSET 0x8
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/* The definition of firmware chunk tags */
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#define FOURCC_ID_RIFF 0x46464952
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#define FOURCC_ID_WHIF 0x46494857
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#define FOURCC_ID_FRMT 0x544D5246
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#define FOURCC_ID_FRWR 0x52575246
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#define FOURCC_ID_CNFG 0x47464E43
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#define CHUNK_ID_FRMT FOURCC_ID_FRMT
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#define CHUNK_ID_FRWR FOURCC_ID_FRWR
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#define CHUNK_ID_CNFG FOURCC_ID_CNFG
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#define FW_FOURCC1_OFFSET 0
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#define FW_SIZE_OFFSET 4
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#define FW_FOURCC2_OFFSET 8
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#define FW_PAYLOAD_OFFSET 40
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#define FW_CHUNK_ID_OFFSET 0
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#define FW_CHUNK_SIZE_OFFSET 4
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#define FW_CHUNK_TGT_START_OFFSET 8
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#define FW_CHUNK_PAYLOAD_LEN_OFFSET 12
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#define FW_CHUNK_SRC_START_OFFSET 16
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#define FW_CHUNK_VERSION_OFFSET 20
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#define FW_CHUNK_ATTR_OFFSET 24
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#define FW_CHUNK_PAYLOAD_OFFSET 32
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/* Controller requires minimum 300us between commands */
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#define WDT_COMMAND_DELAY_MS 2
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#define WDT_FLASH_WRITE_DELAY_MS 4
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#define WDT_FW_RESET_TIME 2500
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struct wdt87xx_sys_param {
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u16 fw_id;
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u16 plat_id;
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u16 xmls_id1;
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u16 xmls_id2;
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u16 phy_ch_x;
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u16 phy_ch_y;
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u16 phy_w;
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u16 phy_h;
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u16 scaling_factor;
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u32 max_x;
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u32 max_y;
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u16 vendor_id;
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u16 product_id;
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};
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struct wdt87xx_data {
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struct i2c_client *client;
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struct input_dev *input;
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/* Mutex for fw update to prevent concurrent access */
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struct mutex fw_mutex;
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struct wdt87xx_sys_param param;
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u8 phys[32];
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};
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static int wdt87xx_i2c_xfer(struct i2c_client *client,
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void *txdata, size_t txlen,
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void *rxdata, size_t rxlen)
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{
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struct i2c_msg msgs[] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = txlen,
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.buf = txdata,
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},
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{
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = rxlen,
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.buf = rxdata,
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},
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};
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int error;
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int ret;
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ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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if (ret != ARRAY_SIZE(msgs)) {
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error = ret < 0 ? ret : -EIO;
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dev_err(&client->dev, "%s: i2c transfer failed: %d\n",
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__func__, error);
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return error;
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}
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return 0;
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}
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static int wdt87xx_get_desc(struct i2c_client *client, u8 desc_idx,
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u8 *buf, size_t len)
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{
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u8 tx_buf[] = { 0x22, 0x00, 0x10, 0x0E, 0x23, 0x00 };
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int error;
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tx_buf[2] |= desc_idx & 0xF;
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error = wdt87xx_i2c_xfer(client, tx_buf, sizeof(tx_buf),
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buf, len);
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if (error) {
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dev_err(&client->dev, "get desc failed: %d\n", error);
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return error;
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}
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if (buf[0] != len) {
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dev_err(&client->dev, "unexpected response to get desc: %d\n",
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buf[0]);
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return -EINVAL;
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}
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mdelay(WDT_COMMAND_DELAY_MS);
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return 0;
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}
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static int wdt87xx_get_string(struct i2c_client *client, u8 str_idx,
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u8 *buf, size_t len)
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{
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u8 tx_buf[] = { 0x22, 0x00, 0x13, 0x0E, str_idx, 0x23, 0x00 };
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u8 rx_buf[PKT_WRITE_SIZE];
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size_t rx_len = len + 2;
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int error;
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if (rx_len > sizeof(rx_buf))
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return -EINVAL;
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error = wdt87xx_i2c_xfer(client, tx_buf, sizeof(tx_buf),
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rx_buf, rx_len);
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if (error) {
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dev_err(&client->dev, "get string failed: %d\n", error);
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return error;
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}
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if (rx_buf[1] != 0x03) {
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dev_err(&client->dev, "unexpected response to get string: %d\n",
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rx_buf[1]);
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return -EINVAL;
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}
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rx_len = min_t(size_t, len, rx_buf[0]);
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memcpy(buf, &rx_buf[2], rx_len);
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mdelay(WDT_COMMAND_DELAY_MS);
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return 0;
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}
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static int wdt87xx_get_feature(struct i2c_client *client,
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u8 *buf, size_t buf_size)
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{
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u8 tx_buf[8];
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u8 rx_buf[PKT_WRITE_SIZE];
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size_t tx_len = 0;
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size_t rx_len = buf_size + 2;
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int error;
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if (rx_len > sizeof(rx_buf))
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return -EINVAL;
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/* Get feature command packet */
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tx_buf[tx_len++] = 0x22;
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tx_buf[tx_len++] = 0x00;
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if (buf[CMD_REPORT_ID_OFFSET] > 0xF) {
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tx_buf[tx_len++] = 0x30;
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tx_buf[tx_len++] = 0x02;
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tx_buf[tx_len++] = buf[CMD_REPORT_ID_OFFSET];
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} else {
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tx_buf[tx_len++] = 0x30 | buf[CMD_REPORT_ID_OFFSET];
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tx_buf[tx_len++] = 0x02;
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}
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tx_buf[tx_len++] = 0x23;
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tx_buf[tx_len++] = 0x00;
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error = wdt87xx_i2c_xfer(client, tx_buf, tx_len, rx_buf, rx_len);
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if (error) {
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dev_err(&client->dev, "get feature failed: %d\n", error);
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return error;
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}
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rx_len = min_t(size_t, buf_size, get_unaligned_le16(rx_buf));
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memcpy(buf, &rx_buf[2], rx_len);
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mdelay(WDT_COMMAND_DELAY_MS);
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return 0;
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}
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static int wdt87xx_set_feature(struct i2c_client *client,
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const u8 *buf, size_t buf_size)
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{
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u8 tx_buf[PKT_WRITE_SIZE];
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int tx_len = 0;
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int error;
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/* Set feature command packet */
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tx_buf[tx_len++] = 0x22;
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tx_buf[tx_len++] = 0x00;
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if (buf[CMD_REPORT_ID_OFFSET] > 0xF) {
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tx_buf[tx_len++] = 0x30;
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tx_buf[tx_len++] = 0x03;
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tx_buf[tx_len++] = buf[CMD_REPORT_ID_OFFSET];
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} else {
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tx_buf[tx_len++] = 0x30 | buf[CMD_REPORT_ID_OFFSET];
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tx_buf[tx_len++] = 0x03;
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}
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tx_buf[tx_len++] = 0x23;
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tx_buf[tx_len++] = 0x00;
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tx_buf[tx_len++] = (buf_size & 0xFF);
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tx_buf[tx_len++] = ((buf_size & 0xFF00) >> 8);
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if (tx_len + buf_size > sizeof(tx_buf))
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return -EINVAL;
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memcpy(&tx_buf[tx_len], buf, buf_size);
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tx_len += buf_size;
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error = i2c_master_send(client, tx_buf, tx_len);
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if (error < 0) {
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dev_err(&client->dev, "set feature failed: %d\n", error);
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return error;
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}
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mdelay(WDT_COMMAND_DELAY_MS);
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return 0;
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}
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static int wdt87xx_send_command(struct i2c_client *client, int cmd, int value)
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{
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u8 cmd_buf[CMD_BUF_SIZE];
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/* Set the command packet */
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cmd_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_WRITE;
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cmd_buf[CMD_TYPE_OFFSET] = VND_SET_COMMAND_DATA;
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put_unaligned_le16((u16)cmd, &cmd_buf[CMD_INDEX_OFFSET]);
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switch (cmd) {
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case VND_CMD_START:
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case VND_CMD_STOP:
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case VND_CMD_RESET:
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/* Mode selector */
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put_unaligned_le32((value & 0xFF), &cmd_buf[CMD_LENGTH_OFFSET]);
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break;
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case VND_CMD_SFLCK:
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put_unaligned_le16(CMD_SFLCK_KEY, &cmd_buf[CMD_KEY_OFFSET]);
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break;
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case VND_CMD_SFUNL:
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put_unaligned_le16(CMD_SFUNL_KEY, &cmd_buf[CMD_KEY_OFFSET]);
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break;
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case VND_CMD_ERASE:
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case VND_SET_CHECKSUM_CALC:
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case VND_SET_CHECKSUM_LENGTH:
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put_unaligned_le32(value, &cmd_buf[CMD_KEY_OFFSET]);
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break;
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default:
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cmd_buf[CMD_REPORT_ID_OFFSET] = 0;
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dev_err(&client->dev, "Invalid command: %d\n", cmd);
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return -EINVAL;
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}
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return wdt87xx_set_feature(client, cmd_buf, sizeof(cmd_buf));
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}
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static int wdt87xx_sw_reset(struct i2c_client *client)
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{
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int error;
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dev_dbg(&client->dev, "resetting device now\n");
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error = wdt87xx_send_command(client, VND_CMD_RESET, 0);
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if (error) {
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dev_err(&client->dev, "reset failed\n");
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return error;
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}
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/* Wait the device to be ready */
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msleep(WDT_FW_RESET_TIME);
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return 0;
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}
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static const void *wdt87xx_get_fw_chunk(const struct firmware *fw, u32 id)
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{
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size_t pos = FW_PAYLOAD_OFFSET;
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u32 chunk_id, chunk_size;
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while (pos < fw->size) {
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chunk_id = get_unaligned_le32(fw->data +
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pos + FW_CHUNK_ID_OFFSET);
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if (chunk_id == id)
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return fw->data + pos;
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chunk_size = get_unaligned_le32(fw->data +
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pos + FW_CHUNK_SIZE_OFFSET);
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pos += chunk_size + 2 * sizeof(u32); /* chunk ID + size */
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}
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return NULL;
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}
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static int wdt87xx_get_sysparam(struct i2c_client *client,
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struct wdt87xx_sys_param *param)
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{
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u8 buf[PKT_READ_SIZE];
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int error;
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error = wdt87xx_get_desc(client, WDT_GD_DEVICE, buf, 18);
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if (error) {
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dev_err(&client->dev, "failed to get device desc\n");
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return error;
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}
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param->vendor_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_VID);
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param->product_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_PID);
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error = wdt87xx_get_string(client, STRIDX_PARAMETERS, buf, 34);
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if (error) {
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dev_err(&client->dev, "failed to get parameters\n");
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return error;
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}
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param->xmls_id1 = get_unaligned_le16(buf + CTL_PARAM_OFFSET_XMLS_ID1);
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param->xmls_id2 = get_unaligned_le16(buf + CTL_PARAM_OFFSET_XMLS_ID2);
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param->phy_ch_x = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_CH_X);
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param->phy_ch_y = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_CH_Y);
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param->phy_w = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_W) / 10;
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param->phy_h = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_H) / 10;
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/* Get the scaling factor of pixel to logical coordinate */
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param->scaling_factor =
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get_unaligned_le16(buf + CTL_PARAM_OFFSET_FACTOR);
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param->max_x = MAX_UNIT_AXIS;
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param->max_y = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS * param->phy_h,
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param->phy_w);
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error = wdt87xx_get_string(client, STRIDX_PLATFORM_ID, buf, 8);
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if (error) {
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dev_err(&client->dev, "failed to get platform id\n");
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return error;
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}
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param->plat_id = buf[1];
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|
|
|
buf[0] = 0xf2;
|
|
error = wdt87xx_get_feature(client, buf, 16);
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to get firmware id\n");
|
|
return error;
|
|
}
|
|
|
|
if (buf[0] != 0xf2) {
|
|
dev_err(&client->dev, "wrong id of fw response: 0x%x\n",
|
|
buf[0]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
param->fw_id = get_unaligned_le16(&buf[1]);
|
|
|
|
dev_info(&client->dev,
|
|
"fw_id: 0x%x, plat_id: 0x%x, xml_id1: %04x, xml_id2: %04x\n",
|
|
param->fw_id, param->plat_id,
|
|
param->xmls_id1, param->xmls_id2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wdt87xx_validate_firmware(struct wdt87xx_data *wdt,
|
|
const struct firmware *fw)
|
|
{
|
|
const void *fw_chunk;
|
|
u32 data1, data2;
|
|
u32 size;
|
|
u8 fw_chip_id;
|
|
u8 chip_id;
|
|
|
|
data1 = get_unaligned_le32(fw->data + FW_FOURCC1_OFFSET);
|
|
data2 = get_unaligned_le32(fw->data + FW_FOURCC2_OFFSET);
|
|
if (data1 != FOURCC_ID_RIFF || data2 != FOURCC_ID_WHIF) {
|
|
dev_err(&wdt->client->dev, "check fw tag failed\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
size = get_unaligned_le32(fw->data + FW_SIZE_OFFSET);
|
|
if (size != fw->size) {
|
|
dev_err(&wdt->client->dev,
|
|
"fw size mismatch: expected %d, actual %zu\n",
|
|
size, fw->size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Get the chip_id from the firmware. Make sure that it is the
|
|
* right controller to do the firmware and config update.
|
|
*/
|
|
fw_chunk = wdt87xx_get_fw_chunk(fw, CHUNK_ID_FRWR);
|
|
if (!fw_chunk) {
|
|
dev_err(&wdt->client->dev,
|
|
"unable to locate firmware chunk\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
fw_chip_id = (get_unaligned_le32(fw_chunk +
|
|
FW_CHUNK_VERSION_OFFSET) >> 12) & 0xF;
|
|
chip_id = (wdt->param.fw_id >> 12) & 0xF;
|
|
|
|
if (fw_chip_id != chip_id) {
|
|
dev_err(&wdt->client->dev,
|
|
"fw version mismatch: fw %d vs. chip %d\n",
|
|
fw_chip_id, chip_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wdt87xx_validate_fw_chunk(const void *data, int id)
|
|
{
|
|
if (id == CHUNK_ID_FRWR) {
|
|
u32 fw_id;
|
|
|
|
fw_id = get_unaligned_le32(data + FW_CHUNK_PAYLOAD_OFFSET);
|
|
if (fw_id != WDT_FIRMWARE_ID)
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wdt87xx_write_data(struct i2c_client *client, const char *data,
|
|
u32 address, int length)
|
|
{
|
|
u16 packet_size;
|
|
int count = 0;
|
|
int error;
|
|
u8 pkt_buf[PKT_BUF_SIZE];
|
|
|
|
/* Address and length should be 4 bytes aligned */
|
|
if ((address & 0x3) != 0 || (length & 0x3) != 0) {
|
|
dev_err(&client->dev,
|
|
"addr & len must be 4 bytes aligned %x, %x\n",
|
|
address, length);
|
|
return -EINVAL;
|
|
}
|
|
|
|
while (length) {
|
|
packet_size = min(length, PACKET_SIZE);
|
|
|
|
pkt_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_WRITE;
|
|
pkt_buf[CMD_TYPE_OFFSET] = VND_SET_DATA;
|
|
put_unaligned_le16(packet_size, &pkt_buf[CMD_INDEX_OFFSET]);
|
|
put_unaligned_le32(address, &pkt_buf[CMD_LENGTH_OFFSET]);
|
|
memcpy(&pkt_buf[CMD_DATA_OFFSET], data, packet_size);
|
|
|
|
error = wdt87xx_set_feature(client, pkt_buf, sizeof(pkt_buf));
|
|
if (error)
|
|
return error;
|
|
|
|
length -= packet_size;
|
|
data += packet_size;
|
|
address += packet_size;
|
|
|
|
/* Wait for the controller to finish the write */
|
|
mdelay(WDT_FLASH_WRITE_DELAY_MS);
|
|
|
|
if ((++count % 32) == 0) {
|
|
/* Delay for fw to clear watch dog */
|
|
msleep(20);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 u16 wdt87xx_calculate_checksum(const u8 *data, size_t length)
|
|
{
|
|
u16 checksum = 0;
|
|
size_t i;
|
|
|
|
for (i = 0; i < length; i++)
|
|
checksum = misr(checksum, data[i]);
|
|
|
|
return checksum;
|
|
}
|
|
|
|
static int wdt87xx_get_checksum(struct i2c_client *client, u16 *checksum,
|
|
u32 address, int length)
|
|
{
|
|
int error;
|
|
int time_delay;
|
|
u8 pkt_buf[PKT_BUF_SIZE];
|
|
u8 cmd_buf[CMD_BUF_SIZE];
|
|
|
|
error = wdt87xx_send_command(client, VND_SET_CHECKSUM_LENGTH, length);
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to set checksum length\n");
|
|
return error;
|
|
}
|
|
|
|
error = wdt87xx_send_command(client, VND_SET_CHECKSUM_CALC, address);
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to set checksum address\n");
|
|
return error;
|
|
}
|
|
|
|
/* Wait the operation to complete */
|
|
time_delay = DIV_ROUND_UP(length, 1024);
|
|
msleep(time_delay * 30);
|
|
|
|
memset(cmd_buf, 0, sizeof(cmd_buf));
|
|
cmd_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_READ;
|
|
cmd_buf[CMD_TYPE_OFFSET] = VND_GET_CHECKSUM;
|
|
error = wdt87xx_set_feature(client, cmd_buf, sizeof(cmd_buf));
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to request checksum\n");
|
|
return error;
|
|
}
|
|
|
|
memset(pkt_buf, 0, sizeof(pkt_buf));
|
|
pkt_buf[CMD_REPORT_ID_OFFSET] = VND_READ_DATA;
|
|
error = wdt87xx_get_feature(client, pkt_buf, sizeof(pkt_buf));
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to read checksum\n");
|
|
return error;
|
|
}
|
|
|
|
*checksum = get_unaligned_le16(&pkt_buf[CMD_DATA_OFFSET]);
|
|
return 0;
|
|
}
|
|
|
|
static int wdt87xx_write_firmware(struct i2c_client *client, const void *chunk)
|
|
{
|
|
u32 start_addr = get_unaligned_le32(chunk + FW_CHUNK_TGT_START_OFFSET);
|
|
u32 size = get_unaligned_le32(chunk + FW_CHUNK_PAYLOAD_LEN_OFFSET);
|
|
const void *data = chunk + FW_CHUNK_PAYLOAD_OFFSET;
|
|
int error;
|
|
int err1;
|
|
int page_size;
|
|
int retry = 0;
|
|
u16 device_checksum, firmware_checksum;
|
|
|
|
dev_dbg(&client->dev, "start 4k page program\n");
|
|
|
|
error = wdt87xx_send_command(client, VND_CMD_STOP, MODE_STOP);
|
|
if (error) {
|
|
dev_err(&client->dev, "stop report mode failed\n");
|
|
return error;
|
|
}
|
|
|
|
error = wdt87xx_send_command(client, VND_CMD_SFUNL, 0);
|
|
if (error) {
|
|
dev_err(&client->dev, "unlock failed\n");
|
|
goto out_enable_reporting;
|
|
}
|
|
|
|
mdelay(10);
|
|
|
|
while (size) {
|
|
dev_dbg(&client->dev, "%s: %x, %x\n", __func__,
|
|
start_addr, size);
|
|
|
|
page_size = min_t(u32, size, PG_SIZE);
|
|
size -= page_size;
|
|
|
|
for (retry = 0; retry < MAX_RETRIES; retry++) {
|
|
error = wdt87xx_send_command(client, VND_CMD_ERASE,
|
|
start_addr);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"erase failed at %#08x\n", start_addr);
|
|
break;
|
|
}
|
|
|
|
msleep(50);
|
|
|
|
error = wdt87xx_write_data(client, data, start_addr,
|
|
page_size);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"write failed at %#08x (%d bytes)\n",
|
|
start_addr, page_size);
|
|
break;
|
|
}
|
|
|
|
error = wdt87xx_get_checksum(client, &device_checksum,
|
|
start_addr, page_size);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to retrieve checksum for %#08x (len: %d)\n",
|
|
start_addr, page_size);
|
|
break;
|
|
}
|
|
|
|
firmware_checksum =
|
|
wdt87xx_calculate_checksum(data, page_size);
|
|
|
|
if (device_checksum == firmware_checksum)
|
|
break;
|
|
|
|
dev_err(&client->dev,
|
|
"checksum fail: %d vs %d, retry %d\n",
|
|
device_checksum, firmware_checksum, retry);
|
|
}
|
|
|
|
if (retry == MAX_RETRIES) {
|
|
dev_err(&client->dev, "page write failed\n");
|
|
error = -EIO;
|
|
goto out_lock_device;
|
|
}
|
|
|
|
start_addr = start_addr + page_size;
|
|
data = data + page_size;
|
|
}
|
|
|
|
out_lock_device:
|
|
err1 = wdt87xx_send_command(client, VND_CMD_SFLCK, 0);
|
|
if (err1)
|
|
dev_err(&client->dev, "lock failed\n");
|
|
|
|
mdelay(10);
|
|
|
|
out_enable_reporting:
|
|
err1 = wdt87xx_send_command(client, VND_CMD_START, 0);
|
|
if (err1)
|
|
dev_err(&client->dev, "start to report failed\n");
|
|
|
|
return error ? error : err1;
|
|
}
|
|
|
|
static int wdt87xx_load_chunk(struct i2c_client *client,
|
|
const struct firmware *fw, u32 ck_id)
|
|
{
|
|
const void *chunk;
|
|
int error;
|
|
|
|
chunk = wdt87xx_get_fw_chunk(fw, ck_id);
|
|
if (!chunk) {
|
|
dev_err(&client->dev, "unable to locate chunk (type %d)\n",
|
|
ck_id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = wdt87xx_validate_fw_chunk(chunk, ck_id);
|
|
if (error) {
|
|
dev_err(&client->dev, "invalid chunk (type %d): %d\n",
|
|
ck_id, error);
|
|
return error;
|
|
}
|
|
|
|
error = wdt87xx_write_firmware(client, chunk);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to write fw chunk (type %d): %d\n",
|
|
ck_id, error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wdt87xx_do_update_firmware(struct i2c_client *client,
|
|
const struct firmware *fw,
|
|
unsigned int chunk_id)
|
|
{
|
|
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
|
|
int error;
|
|
|
|
error = wdt87xx_validate_firmware(wdt, fw);
|
|
if (error)
|
|
return error;
|
|
|
|
error = mutex_lock_interruptible(&wdt->fw_mutex);
|
|
if (error)
|
|
return error;
|
|
|
|
disable_irq(client->irq);
|
|
|
|
error = wdt87xx_load_chunk(client, fw, chunk_id);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"firmware load failed (type: %d): %d\n",
|
|
chunk_id, error);
|
|
goto out;
|
|
}
|
|
|
|
error = wdt87xx_sw_reset(client);
|
|
if (error) {
|
|
dev_err(&client->dev, "soft reset failed: %d\n", error);
|
|
goto out;
|
|
}
|
|
|
|
/* Refresh the parameters */
|
|
error = wdt87xx_get_sysparam(client, &wdt->param);
|
|
if (error)
|
|
dev_err(&client->dev,
|
|
"failed to refresh system paramaters: %d\n", error);
|
|
out:
|
|
enable_irq(client->irq);
|
|
mutex_unlock(&wdt->fw_mutex);
|
|
|
|
return error ? error : 0;
|
|
}
|
|
|
|
static int wdt87xx_update_firmware(struct device *dev,
|
|
const char *fw_name, unsigned int chunk_id)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
const struct firmware *fw;
|
|
int error;
|
|
|
|
error = request_firmware(&fw, fw_name, dev);
|
|
if (error) {
|
|
dev_err(&client->dev, "unable to retrieve firmware %s: %d\n",
|
|
fw_name, error);
|
|
return error;
|
|
}
|
|
|
|
error = wdt87xx_do_update_firmware(client, fw, chunk_id);
|
|
|
|
release_firmware(fw);
|
|
|
|
return error ? error : 0;
|
|
}
|
|
|
|
static ssize_t config_csum_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
|
|
u32 cfg_csum;
|
|
|
|
cfg_csum = wdt->param.xmls_id1;
|
|
cfg_csum = (cfg_csum << 16) | wdt->param.xmls_id2;
|
|
|
|
return scnprintf(buf, PAGE_SIZE, "%x\n", cfg_csum);
|
|
}
|
|
|
|
static ssize_t fw_version_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
|
|
|
|
return scnprintf(buf, PAGE_SIZE, "%x\n", wdt->param.fw_id);
|
|
}
|
|
|
|
static ssize_t plat_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
|
|
|
|
return scnprintf(buf, PAGE_SIZE, "%x\n", wdt->param.plat_id);
|
|
}
|
|
|
|
static ssize_t update_config_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int error;
|
|
|
|
error = wdt87xx_update_firmware(dev, WDT87XX_CFG_NAME, CHUNK_ID_CNFG);
|
|
|
|
return error ? error : count;
|
|
}
|
|
|
|
static ssize_t update_fw_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int error;
|
|
|
|
error = wdt87xx_update_firmware(dev, WDT87XX_FW_NAME, CHUNK_ID_FRWR);
|
|
|
|
return error ? error : count;
|
|
}
|
|
|
|
static DEVICE_ATTR_RO(config_csum);
|
|
static DEVICE_ATTR_RO(fw_version);
|
|
static DEVICE_ATTR_RO(plat_id);
|
|
static DEVICE_ATTR_WO(update_config);
|
|
static DEVICE_ATTR_WO(update_fw);
|
|
|
|
static struct attribute *wdt87xx_attrs[] = {
|
|
&dev_attr_config_csum.attr,
|
|
&dev_attr_fw_version.attr,
|
|
&dev_attr_plat_id.attr,
|
|
&dev_attr_update_config.attr,
|
|
&dev_attr_update_fw.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group wdt87xx_attr_group = {
|
|
.attrs = wdt87xx_attrs,
|
|
};
|
|
|
|
static void wdt87xx_report_contact(struct input_dev *input,
|
|
struct wdt87xx_sys_param *param,
|
|
u8 *buf)
|
|
{
|
|
int finger_id;
|
|
u32 x, y, w;
|
|
u8 p;
|
|
|
|
finger_id = (buf[FINGER_EV_V1_OFFSET_ID] >> 3) - 1;
|
|
if (finger_id < 0)
|
|
return;
|
|
|
|
/* Check if this is an active contact */
|
|
if (!(buf[FINGER_EV_V1_OFFSET_ID] & 0x1))
|
|
return;
|
|
|
|
w = buf[FINGER_EV_V1_OFFSET_W];
|
|
w *= param->scaling_factor;
|
|
|
|
p = buf[FINGER_EV_V1_OFFSET_P];
|
|
|
|
x = get_unaligned_le16(buf + FINGER_EV_V1_OFFSET_X);
|
|
|
|
y = get_unaligned_le16(buf + FINGER_EV_V1_OFFSET_Y);
|
|
y = DIV_ROUND_CLOSEST(y * param->phy_h, param->phy_w);
|
|
|
|
/* Refuse incorrect coordinates */
|
|
if (x > param->max_x || y > param->max_y)
|
|
return;
|
|
|
|
dev_dbg(input->dev.parent, "tip on (%d), x(%d), y(%d)\n",
|
|
finger_id, x, y);
|
|
|
|
input_mt_slot(input, finger_id);
|
|
input_mt_report_slot_state(input, MT_TOOL_FINGER, 1);
|
|
input_report_abs(input, ABS_MT_TOUCH_MAJOR, w);
|
|
input_report_abs(input, ABS_MT_PRESSURE, p);
|
|
input_report_abs(input, ABS_MT_POSITION_X, x);
|
|
input_report_abs(input, ABS_MT_POSITION_Y, y);
|
|
}
|
|
|
|
static irqreturn_t wdt87xx_ts_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct wdt87xx_data *wdt = dev_id;
|
|
struct i2c_client *client = wdt->client;
|
|
int i, fingers;
|
|
int error;
|
|
u8 raw_buf[WDT_V1_RAW_BUF_COUNT] = {0};
|
|
|
|
error = i2c_master_recv(client, raw_buf, WDT_V1_RAW_BUF_COUNT);
|
|
if (error < 0) {
|
|
dev_err(&client->dev, "read v1 raw data failed: %d\n", error);
|
|
goto irq_exit;
|
|
}
|
|
|
|
fingers = raw_buf[TOUCH_PK_V1_OFFSET_FNGR_NUM];
|
|
if (!fingers)
|
|
goto irq_exit;
|
|
|
|
for (i = 0; i < WDT_MAX_FINGER; i++)
|
|
wdt87xx_report_contact(wdt->input,
|
|
&wdt->param,
|
|
&raw_buf[TOUCH_PK_V1_OFFSET_EVENT +
|
|
i * FINGER_EV_V1_SIZE]);
|
|
|
|
input_mt_sync_frame(wdt->input);
|
|
input_sync(wdt->input);
|
|
|
|
irq_exit:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int wdt87xx_ts_create_input_device(struct wdt87xx_data *wdt)
|
|
{
|
|
struct device *dev = &wdt->client->dev;
|
|
struct input_dev *input;
|
|
unsigned int res = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS, wdt->param.phy_w);
|
|
int error;
|
|
|
|
input = devm_input_allocate_device(dev);
|
|
if (!input) {
|
|
dev_err(dev, "failed to allocate input device\n");
|
|
return -ENOMEM;
|
|
}
|
|
wdt->input = input;
|
|
|
|
input->name = "WDT87xx Touchscreen";
|
|
input->id.bustype = BUS_I2C;
|
|
input->id.vendor = wdt->param.vendor_id;
|
|
input->id.product = wdt->param.product_id;
|
|
input->phys = wdt->phys;
|
|
|
|
input_set_abs_params(input, ABS_MT_POSITION_X, 0,
|
|
wdt->param.max_x, 0, 0);
|
|
input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
|
|
wdt->param.max_y, 0, 0);
|
|
input_abs_set_res(input, ABS_MT_POSITION_X, res);
|
|
input_abs_set_res(input, ABS_MT_POSITION_Y, res);
|
|
|
|
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
|
|
0, wdt->param.max_x, 0, 0);
|
|
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xFF, 0, 0);
|
|
|
|
input_mt_init_slots(input, WDT_MAX_FINGER,
|
|
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
|
|
|
|
error = input_register_device(input);
|
|
if (error) {
|
|
dev_err(dev, "failed to register input device: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wdt87xx_ts_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct wdt87xx_data *wdt;
|
|
int error;
|
|
|
|
dev_dbg(&client->dev, "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 -ENXIO;
|
|
|
|
wdt = devm_kzalloc(&client->dev, sizeof(*wdt), GFP_KERNEL);
|
|
if (!wdt)
|
|
return -ENOMEM;
|
|
|
|
wdt->client = client;
|
|
mutex_init(&wdt->fw_mutex);
|
|
i2c_set_clientdata(client, wdt);
|
|
|
|
snprintf(wdt->phys, sizeof(wdt->phys), "i2c-%u-%04x/input0",
|
|
client->adapter->nr, client->addr);
|
|
|
|
error = wdt87xx_get_sysparam(client, &wdt->param);
|
|
if (error)
|
|
return error;
|
|
|
|
error = wdt87xx_ts_create_input_device(wdt);
|
|
if (error)
|
|
return error;
|
|
|
|
error = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL, wdt87xx_ts_interrupt,
|
|
IRQF_ONESHOT,
|
|
client->name, wdt);
|
|
if (error) {
|
|
dev_err(&client->dev, "request irq failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = sysfs_create_group(&client->dev.kobj, &wdt87xx_attr_group);
|
|
if (error) {
|
|
dev_err(&client->dev, "create sysfs failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wdt87xx_ts_remove(struct i2c_client *client)
|
|
{
|
|
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 error;
|
|
|
|
disable_irq(client->irq);
|
|
|
|
error = wdt87xx_send_command(client, VND_CMD_STOP, MODE_IDLE);
|
|
if (error) {
|
|
enable_irq(client->irq);
|
|
dev_err(&client->dev,
|
|
"failed to stop device when suspending: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused wdt87xx_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int error;
|
|
|
|
/*
|
|
* The chip may have been reset while system is resuming,
|
|
* give it some time to settle.
|
|
*/
|
|
mdelay(100);
|
|
|
|
error = wdt87xx_send_command(client, VND_CMD_START, 0);
|
|
if (error)
|
|
dev_err(&client->dev,
|
|
"failed to start device when resuming: %d\n",
|
|
error);
|
|
|
|
enable_irq(client->irq);
|
|
|
|
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,
|
|
.pm = &wdt87xx_pm_ops,
|
|
.acpi_match_table = ACPI_PTR(wdt87xx_acpi_id),
|
|
},
|
|
};
|
|
module_i2c_driver(wdt87xx_driver);
|
|
|
|
MODULE_AUTHOR("HN Chen <hn.chen@weidahitech.com>");
|
|
MODULE_DESCRIPTION("WeidaHiTech WDT87XX Touchscreen driver");
|
|
MODULE_VERSION(WDT87XX_DRV_VER);
|
|
MODULE_LICENSE("GPL");
|