new file mode 100644
@@ -0,0 +1,42 @@
+* HiDeep Finger and Stylus touchscreen controller
+
+Required properties:
+- compatible : must be "hideep,hideep-ts"
+- reg : I2C slave address, (e.g. 0x6C).
+- interrupt-parent : Interrupt controller to which the chip is connected.
+- interrupts : Interrupt to which the chip is connected.
+
+Optional properties:
+- vdd-supply : It is the controller supply for controlling
+ main voltage(3.3V) through the regulator.
+- vid-supply : It is the controller supply for controlling
+ IO voltage(1.8V) through the regulator.
+- reset-gpios : Define for reset gpio pin.
+ It is to use for reset IC.
+- touchscreen-size-x : X axis size of touchscreen
+- touchscreen-size-y : Y axis size of touchscreen
+- linux,keycodes : Specifies an array of numeric keycode values to
+ be used for reporting button presses. The array can
+ contain up to 3 entries.
+
+Example:
+
+#include "dt-bindings/input/input.h"
+
+i2c@00000000 {
+
+ /* ... */
+
+ touchscreen@6c {
+ compatible = "hideep,hideep-ts";
+ reg = <0x6c>;
+ interrupt-parent = <&gpx1>;
+ interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+ vdd-supply = <&ldo15_reg>";
+ vid-supply = <&ldo18_reg>;
+ reset-gpios = <&gpx1 5 0>;
+ touchscreen-size-x = <1080>;
+ touchscreen-size-y = <1920>;
+ linux,keycodes = <KEY_HOME>, <KEY_MENU>, <KEY_BACK>;
+ };
+};
@@ -137,6 +137,7 @@ gw Gateworks Corporation
hannstar HannStar Display Corporation
haoyu Haoyu Microelectronic Co. Ltd.
hardkernel Hardkernel Co., Ltd
+hideep HiDeep Inc.
himax Himax Technologies, Inc.
hisilicon Hisilicon Limited.
hit Hitachi Ltd.
@@ -354,6 +354,17 @@ config TOUCHSCREEN_GOODIX
To compile this driver as a module, choose M here: the
module will be called goodix.
+config TOUCHSCREEN_HIDEEP
+ tristate "HiDeep Touch IC"
+ depends on I2C
+ help
+ Say Y here if you have a touchscreen using HiDeep.
+
+ If unsure, say N.
+
+ To compile this driver as a moudle, choose M here : the
+ module will be called hideep_ts.
+
config TOUCHSCREEN_ILI210X
tristate "Ilitek ILI210X based touchscreen"
depends on I2C
@@ -40,6 +40,7 @@ obj-$(CONFIG_TOUCHSCREEN_EGALAX_SERIAL) += egalax_ts_serial.o
obj-$(CONFIG_TOUCHSCREEN_EXC3000) += exc3000.o
obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o
obj-$(CONFIG_TOUCHSCREEN_GOODIX) += goodix.o
+obj-$(CONFIG_TOUCHSCREEN_HIDEEP) += hideep.o
obj-$(CONFIG_TOUCHSCREEN_ILI210X) += ili210x.o
obj-$(CONFIG_TOUCHSCREEN_IMX6UL_TSC) += imx6ul_tsc.o
obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o
new file mode 100644
@@ -0,0 +1,1131 @@
+/*
+ * Copyright (C) 2012-2017 Hideep, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foudation.
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/firmware.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/sysfs.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/regulator/consumer.h>
+#include <asm/unaligned.h>
+
+#define HIDEEP_TS_NAME "HiDeep Touchscreen"
+#define HIDEEP_I2C_NAME "hideep_ts"
+
+#define HIDEEP_MT_MAX 10
+#define HIDEEP_KEY_MAX 3
+
+/* count(2) + touch data(100) + key data(6) */
+#define HIDEEP_MAX_EVENT 108UL
+
+#define HIDEEP_TOUCH_EVENT_INDEX 2
+#define HIDEEP_KEY_EVENT_INDEX 102
+
+/* Touch & key event */
+#define HIDEEP_EVENT_ADDR 0x240
+
+/* command list */
+#define HIDEEP_RESET_CMD 0x9800
+
+/* event bit */
+#define HIDEEP_MT_RELEASED BIT(4)
+#define HIDEEP_KEY_PRESSED BIT(7)
+#define HIDEEP_KEY_FIRST_PRESSED BIT(8)
+#define HIDEEP_KEY_PRESSED_MASK (HIDEEP_KEY_PRESSED | \
+ HIDEEP_KEY_FIRST_PRESSED)
+
+#define HIDEEP_KEY_IDX_MASK 0x0f
+
+/* For NVM */
+#define HIDEEP_YRAM_BASE 0x40000000
+#define HIDEEP_PERIPHERAL_BASE 0x50000000
+#define HIDEEP_ESI_BASE (HIDEEP_PERIPHERAL_BASE + 0x00000000)
+#define HIDEEP_FLASH_BASE (HIDEEP_PERIPHERAL_BASE + 0x01000000)
+#define HIDEEP_SYSCON_BASE (HIDEEP_PERIPHERAL_BASE + 0x02000000)
+
+#define HIDEEP_SYSCON_MOD_CON (HIDEEP_SYSCON_BASE + 0x0000)
+#define HIDEEP_SYSCON_SPC_CON (HIDEEP_SYSCON_BASE + 0x0004)
+#define HIDEEP_SYSCON_CLK_CON (HIDEEP_SYSCON_BASE + 0x0008)
+#define HIDEEP_SYSCON_CLK_ENA (HIDEEP_SYSCON_BASE + 0x000C)
+#define HIDEEP_SYSCON_RST_CON (HIDEEP_SYSCON_BASE + 0x0010)
+#define HIDEEP_SYSCON_WDT_CON (HIDEEP_SYSCON_BASE + 0x0014)
+#define HIDEEP_SYSCON_WDT_CNT (HIDEEP_SYSCON_BASE + 0x0018)
+#define HIDEEP_SYSCON_PWR_CON (HIDEEP_SYSCON_BASE + 0x0020)
+#define HIDEEP_SYSCON_PGM_ID (HIDEEP_SYSCON_BASE + 0x00F4)
+
+#define HIDEEP_FLASH_CON (HIDEEP_FLASH_BASE + 0x0000)
+#define HIDEEP_FLASH_STA (HIDEEP_FLASH_BASE + 0x0004)
+#define HIDEEP_FLASH_CFG (HIDEEP_FLASH_BASE + 0x0008)
+#define HIDEEP_FLASH_TIM (HIDEEP_FLASH_BASE + 0x000C)
+#define HIDEEP_FLASH_CACHE_CFG (HIDEEP_FLASH_BASE + 0x0010)
+#define HIDEEP_FLASH_PIO_SIG (HIDEEP_FLASH_BASE + 0x400000)
+
+#define HIDEEP_ESI_TX_INVALID (HIDEEP_ESI_BASE + 0x0008)
+
+#define HIDEEP_PERASE 0x00040000
+#define HIDEEP_WRONLY 0x00100000
+
+#define HIDEEP_NVM_MASK_OFS 0x0000000C
+#define HIDEEP_NVM_DEFAULT_PAGE 0
+#define HIDEEP_NVM_SFR_WPAGE 1
+#define HIDEEP_NVM_SFR_RPAGE 2
+
+#define HIDEEP_PIO_SIG 0x00400000
+#define HIDEEP_PROT_MODE 0x03400000
+
+#define HIDEEP_NVM_PAGE_SIZE 128UL
+
+#define HIDEEP_DWZ_INFO 0x000002C0
+
+struct hideep_event {
+ __le16 x;
+ __le16 y;
+ __le16 z;
+ u8 w;
+ u8 flag;
+ u8 type;
+ u8 index;
+};
+
+struct dwz_info {
+ __be32 code_start;
+ u8 code_crc[12];
+
+ __be32 c_code_start;
+ __be16 gen_ver;
+ __be16 c_code_len;
+
+ __be32 vr_start;
+ __be16 rsv0;
+ __be16 vr_len;
+
+ __be32 ft_start;
+ __be16 vr_version;
+ __be16 ft_len;
+
+ __be16 core_ver;
+ __be16 boot_ver;
+
+ __be16 release_ver;
+ __be16 custom_ver;
+
+ u8 model_name[6];
+ u8 factory_id;
+ u8 panel_type;
+
+ __be16 extra_option;
+ __be16 product_code;
+
+ __be16 vendor_id;
+ __be16 product_id;
+};
+
+struct pgm_packet {
+ struct {
+ u8 unused[3];
+ u8 len;
+ __be32 addr;
+ } header;
+ __be32 payload[HIDEEP_NVM_PAGE_SIZE / sizeof(__be32)];
+};
+
+#define HIDEEP_XFER_BUF_SIZE sizeof(struct pgm_packet)
+
+struct hideep_ts {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ struct regmap *reg;
+
+ struct touchscreen_properties prop;
+
+ struct gpio_desc *reset_gpio;
+
+ struct regulator *vcc_vdd;
+ struct regulator *vcc_vid;
+
+ struct mutex dev_mutex;
+
+ u32 tch_count;
+ u32 lpm_count;
+
+ /*
+ * Data buffer to read packet from the device (contacts and key
+ * states). We align it on double-word boundary to keep word-sized
+ * fields in contact data and double-word-sized fields in program
+ * packet aligned.
+ */
+ u8 xfer_buf[HIDEEP_XFER_BUF_SIZE] __aligned(4);
+
+ int key_num;
+ u32 key_codes[HIDEEP_KEY_MAX];
+
+ struct dwz_info dwz_info;
+
+ unsigned int fw_size;
+ u32 nvm_mask;
+};
+
+static int hideep_pgm_w_mem(struct hideep_ts *ts, u32 addr,
+ const __be32 *data, size_t count)
+{
+ struct pgm_packet *packet = (void *)ts->xfer_buf;
+ size_t len = count * sizeof(*data);
+ struct i2c_msg msg = {
+ .addr = ts->client->addr,
+ .len = len + sizeof(packet->header.len) +
+ sizeof(packet->header.addr),
+ .buf = &packet->header.len,
+ };
+ int ret;
+
+ if (len > HIDEEP_NVM_PAGE_SIZE)
+ return -EINVAL;
+
+ packet->header.len = 0x80 | (count - 1);
+ packet->header.addr = cpu_to_be32(addr);
+ memcpy(packet->payload, data, len);
+
+ ret = i2c_transfer(ts->client->adapter, &msg, 1);
+ if (ret != 1)
+ return ret < 0 ? ret : -EIO;
+
+ return 0;
+}
+
+static int hideep_pgm_r_mem(struct hideep_ts *ts, u32 addr,
+ __be32 *data, size_t count)
+{
+ struct pgm_packet *packet = (void *)ts->xfer_buf;
+ size_t len = count * sizeof(*data);
+ struct i2c_msg msg[] = {
+ {
+ .addr = ts->client->addr,
+ .len = sizeof(packet->header.len) +
+ sizeof(packet->header.addr),
+ .buf = &packet->header.len,
+ },
+ {
+ .addr = ts->client->addr,
+ .flags = I2C_M_RD,
+ .len = len,
+ .buf = (u8 *)data,
+ },
+ };
+ int ret;
+
+ if (len > HIDEEP_NVM_PAGE_SIZE)
+ return -EINVAL;
+
+ packet->header.len = count - 1;
+ packet->header.addr = cpu_to_be32(addr);
+
+ ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
+ if (ret != ARRAY_SIZE(msg))
+ return ret < 0 ? ret : -EIO;
+
+ return 0;
+}
+
+static int hideep_pgm_r_reg(struct hideep_ts *ts, u32 addr, u32 *val)
+{
+ __be32 data;
+ int error;
+
+ error = hideep_pgm_r_mem(ts, addr, &data, 1);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "read of register %#08x failed: %d\n",
+ addr, error);
+ return error;
+ }
+
+ *val = be32_to_cpu(data);
+ return 0;
+}
+
+static int hideep_pgm_w_reg(struct hideep_ts *ts, u32 addr, u32 val)
+{
+ __be32 data = cpu_to_be32(val);
+ int error;
+
+ error = hideep_pgm_w_mem(ts, addr, &data, 1);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "write to register %#08x (%#08x) failed: %d\n",
+ addr, val, error);
+ return error;
+ }
+
+ return 0;
+}
+
+#define SW_RESET_IN_PGM(clk) \
+{ \
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CNT, (clk)); \
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x03); \
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x01); \
+}
+
+#define SET_FLASH_PIO(ce) \
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_CON, \
+ 0x01 | ((ce) << 1))
+
+#define SET_PIO_SIG(x, y) \
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_PIO_SIG + (x), (y))
+
+#define SET_FLASH_HWCONTROL() \
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_CON, 0x00)
+
+#define NVM_W_SFR(x, y) \
+{ \
+ SET_FLASH_PIO(1); \
+ SET_PIO_SIG(x, y); \
+ SET_FLASH_PIO(0); \
+}
+
+static void hideep_pgm_set(struct hideep_ts *ts)
+{
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x00);
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_SPC_CON, 0x00);
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_CLK_ENA, 0xFF);
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_CLK_CON, 0x01);
+ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_PWR_CON, 0x01);
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_TIM, 0x03);
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_CACHE_CFG, 0x00);
+}
+
+static int hideep_pgm_get_pattern(struct hideep_ts *ts, u32 *pattern)
+{
+ u16 p1 = 0xAF39;
+ u16 p2 = 0xDF9D;
+ int error;
+
+ error = regmap_bulk_write(ts->reg, p1, &p2, 1);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "%s: regmap_bulk_write() failed with %d\n",
+ __func__, error);
+ return error;
+ }
+
+ usleep_range(1000, 1100);
+
+ /* flush invalid Tx load register */
+ error = hideep_pgm_w_reg(ts, HIDEEP_ESI_TX_INVALID, 0x01);
+ if (error)
+ return error;
+
+ error = hideep_pgm_r_reg(ts, HIDEEP_SYSCON_PGM_ID, pattern);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static int hideep_enter_pgm(struct hideep_ts *ts)
+{
+ int retry_count = 10;
+ u32 pattern;
+ int error;
+
+ while (retry_count--) {
+ error = hideep_pgm_get_pattern(ts, &pattern);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "hideep_pgm_get_pattern failed: %d\n", error);
+ } else if (pattern != 0x39AF9DDF) {
+ dev_err(&ts->client->dev, "%s: bad pattern: %#08x\n",
+ __func__, pattern);
+ } else {
+ dev_dbg(&ts->client->dev, "found magic code");
+
+ hideep_pgm_set(ts);
+ usleep_range(1000, 1100);
+
+ return 0;
+ }
+ }
+
+ dev_err(&ts->client->dev, "failed to enter pgm mode\n");
+ SW_RESET_IN_PGM(1000);
+ return -EIO;
+}
+
+static void hideep_nvm_unlock(struct hideep_ts *ts)
+{
+ u32 unmask_code;
+
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_SFR_RPAGE);
+ hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code);
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE);
+
+ /* make it unprotected code */
+ unmask_code &= ~HIDEEP_PROT_MODE;
+
+ /* compare unmask code */
+ if (unmask_code != ts->nvm_mask)
+ dev_warn(&ts->client->dev,
+ "read mask code different %#08x vs %#08x",
+ unmask_code, ts->nvm_mask);
+
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_SFR_WPAGE);
+ SET_FLASH_PIO(0);
+
+ NVM_W_SFR(HIDEEP_NVM_MASK_OFS, ts->nvm_mask);
+ SET_FLASH_HWCONTROL();
+ hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE);
+}
+
+static int hideep_check_status(struct hideep_ts *ts)
+{
+ int time_out = 100;
+ int status;
+ int error;
+
+ while (time_out--) {
+ error = hideep_pgm_r_reg(ts, HIDEEP_FLASH_STA, &status);
+ if (!error && status)
+ return 0;
+
+ usleep_range(1000, 1100);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int hideep_program_page(struct hideep_ts *ts, u32 addr,
+ __be32 *ucode, size_t xfer_count)
+{
+ u32 val;
+ int error;
+
+ error = hideep_check_status(ts);
+ if (error)
+ return -EBUSY;
+
+ addr &= ~(HIDEEP_NVM_PAGE_SIZE - 1);
+
+ SET_FLASH_PIO(0);
+ SET_FLASH_PIO(1);
+
+ /* erase page */
+ SET_PIO_SIG(HIDEEP_PERASE | addr, 0xFFFFFFFF);
+
+ SET_FLASH_PIO(0);
+
+ error = hideep_check_status(ts);
+ if (error)
+ return -EBUSY;
+
+ /* write page */
+ SET_FLASH_PIO(1);
+
+ val = be32_to_cpu(ucode[0]);
+ SET_PIO_SIG(HIDEEP_WRONLY | addr, val);
+
+ hideep_pgm_w_mem(ts, HIDEEP_FLASH_PIO_SIG | HIDEEP_WRONLY,
+ ucode, xfer_count);
+
+ val = be32_to_cpu(ucode[xfer_count - 1]);
+ SET_PIO_SIG(124, val);
+
+ SET_FLASH_PIO(0);
+
+ usleep_range(1000, 1100);
+
+ error = hideep_check_status(ts);
+ if (error)
+ return -EBUSY;
+
+ SET_FLASH_HWCONTROL();
+
+ return 0;
+}
+
+static int hideep_program_nvm(struct hideep_ts *ts,
+ const u32 *ucode, size_t ucode_len)
+{
+ struct pgm_packet *packet_r = (void *)ts->xfer_buf;
+ __be32 *current_ucode = packet_r->payload;
+ __be32 write_ucode[HIDEEP_NVM_PAGE_SIZE];
+ size_t xfer_len;
+ size_t xfer_count;
+ u32 addr = 0;
+ int i;
+ int error;
+
+ hideep_nvm_unlock(ts);
+
+ while (ucode_len > 0) {
+ xfer_len = min(ucode_len, HIDEEP_NVM_PAGE_SIZE);
+ xfer_count = xfer_len / sizeof(*ucode);
+
+ error = hideep_pgm_r_mem(ts, 0x00000000 + addr,
+ current_ucode, xfer_count);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "%s: failed to read page at offset %#08x: %d\n",
+ __func__, addr, error);
+ return error;
+ }
+
+ /* Need to because binary data is little endian */
+ for (i = 0; i < xfer_len; i++)
+ write_ucode[i] = cpu_to_be32(ucode[i]);
+
+ /* See if the page needs updating */
+ if (memcmp(write_ucode, current_ucode, xfer_len)) {
+ error = hideep_program_page(ts, addr,
+ write_ucode, xfer_count);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "%s: iwrite failure @%#08x: %d\n",
+ __func__, addr, error);
+ return error;
+ }
+
+ usleep_range(1000, 1100);
+ }
+
+ ucode += xfer_count;
+ addr += xfer_len;
+ ucode_len -= xfer_len;
+ }
+
+ return 0;
+}
+
+static int hideep_verify_nvm(struct hideep_ts *ts,
+ const u32 *ucode, size_t ucode_len)
+{
+ struct pgm_packet *packet_r = (void *)ts->xfer_buf;
+ __be32 *current_ucode = packet_r->payload;
+ __be32 verify_ucode[HIDEEP_NVM_PAGE_SIZE];
+ size_t xfer_len;
+ size_t xfer_count;
+ u32 addr = 0;
+ int i;
+ int error;
+
+ while (ucode_len > 0) {
+ xfer_len = min(ucode_len, HIDEEP_NVM_PAGE_SIZE);
+ xfer_count = xfer_len / sizeof(*ucode);
+
+ error = hideep_pgm_r_mem(ts, 0x00000000 + addr,
+ current_ucode, xfer_count);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "%s: failed to read page at offset %#08x: %d\n",
+ __func__, addr, error);
+ return error;
+ }
+
+ /* Need to because binary data is little endian */
+ for (i = 0; i < xfer_len; i++)
+ verify_ucode[i] = cpu_to_be32(ucode[i]);
+
+ if (memcmp(verify_ucode, current_ucode, xfer_len)) {
+ const u8 *ucode_bytes = (const u8 *)verify_ucode;
+ const u8 *current_bytes = (const u8 *)current_ucode;
+
+ for (i = 0; i < xfer_len; i++)
+ if (ucode_bytes[i] != current_bytes[i])
+ dev_err(&ts->client->dev,
+ "%s: mismatch @%#08x: (%#02x vs %#02x)\n",
+ __func__, addr + i,
+ ucode_bytes[i],
+ current_bytes[i]);
+
+ return -EIO;
+ }
+
+ ucode += xfer_count;
+ addr += xfer_len;
+ ucode_len -= xfer_len;
+ }
+
+ return 0;
+}
+
+static int hideep_load_dwz(struct hideep_ts *ts)
+{
+ u16 product_code;
+ int error;
+
+ error = hideep_enter_pgm(ts);
+ if (error)
+ return error;
+
+ msleep(50);
+
+ error = hideep_pgm_r_mem(ts, HIDEEP_DWZ_INFO,
+ (void *)&ts->dwz_info,
+ sizeof(ts->dwz_info) / sizeof(__be32));
+
+ SW_RESET_IN_PGM(10);
+ msleep(50);
+
+ if (error) {
+ dev_err(&ts->client->dev,
+ "failed to fetch DWZ data: %d\n", error);
+ return error;
+ }
+
+ product_code = be16_to_cpu(ts->dwz_info.product_code);
+
+ switch (product_code & 0xF0) {
+ case 0x40:
+ dev_dbg(&ts->client->dev, "used crimson IC");
+ ts->fw_size = 1024 * 48;
+ ts->nvm_mask = 0x00310000;
+ break;
+ case 0x60:
+ dev_dbg(&ts->client->dev, "used lime IC");
+ ts->fw_size = 1024 * 64;
+ ts->nvm_mask = 0x0030027B;
+ break;
+ default:
+ dev_err(&ts->client->dev, "product code is wrong: %#04x",
+ product_code);
+ return -EINVAL;
+ }
+
+ dev_dbg(&ts->client->dev, "firmware release version: %#04x",
+ be16_to_cpu(ts->dwz_info.release_ver));
+
+ return 0;
+}
+
+static int hideep_flash_firmware(struct hideep_ts *ts,
+ const u32 *ucode, size_t ucode_len)
+{
+ int retry_cnt = 3;
+ int error;
+
+ while (retry_cnt--) {
+ error = hideep_program_nvm(ts, ucode, ucode_len);
+ if (!error) {
+ error = hideep_verify_nvm(ts, ucode, ucode_len);
+ if (!error)
+ return 0;
+ }
+ }
+
+ return error;
+}
+
+static int hideep_update_firmware(struct hideep_ts *ts,
+ const u32 *ucode, size_t ucode_len)
+{
+ int error, error2;
+
+ dev_dbg(&ts->client->dev, "starting firmware update");
+
+ /* enter program mode */
+ error = hideep_enter_pgm(ts);
+ if (error)
+ return error;
+
+ error = hideep_flash_firmware(ts, ucode, ucode_len);
+ if (error)
+ dev_err(&ts->client->dev,
+ "firmware update failed: %d\n", error);
+ else
+ dev_dbg(&ts->client->dev, "firmware updated successfully\n");
+
+ SW_RESET_IN_PGM(1000);
+
+ error2 = hideep_load_dwz(ts);
+ if (error2)
+ dev_err(&ts->client->dev,
+ "failed to load dwz after firmware update: %d\n",
+ error2);
+
+ return error ?: error2;
+}
+
+static int hideep_power_on(struct hideep_ts *ts)
+{
+ int error = 0;
+
+ error = regulator_enable(ts->vcc_vdd);
+ if (error)
+ dev_err(&ts->client->dev,
+ "failed to enable 'vdd' regulator: %d", error);
+
+ usleep_range(999, 1000);
+
+ error = regulator_enable(ts->vcc_vid);
+ if (error)
+ dev_err(&ts->client->dev,
+ "failed to enable 'vcc_vid' regulator: %d",
+ error);
+
+ msleep(30);
+
+ if (ts->reset_gpio) {
+ gpiod_set_value_cansleep(ts->reset_gpio, 0);
+ } else {
+ error = regmap_write(ts->reg, HIDEEP_RESET_CMD, 0x01);
+ if (error)
+ dev_err(&ts->client->dev,
+ "failed to send 'reset' command: %d\n", error);
+ }
+
+ msleep(50);
+
+ return error;
+}
+
+static void hideep_power_off(void *data)
+{
+ struct hideep_ts *ts = data;
+
+ if (ts->reset_gpio)
+ gpiod_set_value(ts->reset_gpio, 1);
+
+ regulator_disable(ts->vcc_vid);
+ regulator_disable(ts->vcc_vdd);
+}
+
+#define __GET_MT_TOOL_TYPE(type) ((type) == 0x01 ? MT_TOOL_FINGER : MT_TOOL_PEN)
+
+static void hideep_report_slot(struct input_dev *input,
+ const struct hideep_event *event)
+{
+ input_mt_slot(input, event->index & 0x0f);
+ input_mt_report_slot_state(input,
+ __GET_MT_TOOL_TYPE(event->type),
+ !(event->flag & HIDEEP_MT_RELEASED));
+ if (!(event->flag & HIDEEP_MT_RELEASED)) {
+ input_report_abs(input, ABS_MT_POSITION_X,
+ le16_to_cpup(&event->x));
+ input_report_abs(input, ABS_MT_POSITION_Y,
+ le16_to_cpup(&event->y));
+ input_report_abs(input, ABS_MT_PRESSURE,
+ le16_to_cpup(&event->z));
+ input_report_abs(input, ABS_MT_TOUCH_MAJOR, event->w);
+ }
+}
+
+static void hideep_parse_and_report(struct hideep_ts *ts)
+{
+ const struct hideep_event *events =
+ (void *)&ts->xfer_buf[HIDEEP_TOUCH_EVENT_INDEX];
+ const u8 *keys = &ts->xfer_buf[HIDEEP_KEY_EVENT_INDEX];
+ int touch_count = ts->xfer_buf[0];
+ int key_count = ts->xfer_buf[1] & 0x0f;
+ int lpm_count = ts->xfer_buf[1] & 0xf0;
+ int i;
+
+ /* get touch event count */
+ dev_dbg(&ts->client->dev, "mt = %d, key = %d, lpm = %02x",
+ touch_count, key_count, lpm_count);
+
+ touch_count = min(touch_count, HIDEEP_MT_MAX);
+ for (i = 0; i < touch_count; i++)
+ hideep_report_slot(ts->input_dev, events + i);
+
+ key_count = min(key_count, HIDEEP_KEY_MAX);
+ for (i = 0; i < key_count; i++) {
+ u8 key_data = keys[i * 2];
+
+ input_report_key(ts->input_dev,
+ ts->key_codes[key_data & HIDEEP_KEY_IDX_MASK],
+ key_data & HIDEEP_KEY_PRESSED_MASK);
+ }
+
+ input_mt_sync_frame(ts->input_dev);
+ input_sync(ts->input_dev);
+}
+
+static irqreturn_t hideep_irq(int irq, void *handle)
+{
+ struct hideep_ts *ts = handle;
+ int error;
+
+ BUILD_BUG_ON(HIDEEP_MAX_EVENT > HIDEEP_XFER_BUF_SIZE);
+
+ error = regmap_bulk_read(ts->reg, HIDEEP_EVENT_ADDR,
+ ts->xfer_buf, HIDEEP_MAX_EVENT / 2);
+ if (error) {
+ dev_err(&ts->client->dev, "failed to read events: %d\n", error);
+ goto out;
+ }
+
+ hideep_parse_and_report(ts);
+
+out:
+ return IRQ_HANDLED;
+}
+
+static int hideep_get_axis_info(struct hideep_ts *ts)
+{
+ __le16 val[2];
+ int error;
+
+ error = regmap_bulk_read(ts->reg, 0x28, val, ARRAY_SIZE(val));
+ if (error)
+ return error;
+
+ ts->prop.max_x = le16_to_cpup(val);
+ ts->prop.max_y = le16_to_cpup(val + 1);
+
+ dev_dbg(&ts->client->dev, "X: %d, Y: %d",
+ ts->prop.max_x, ts->prop.max_y);
+
+ return 0;
+}
+
+static int hideep_init_input(struct hideep_ts *ts)
+{
+ struct device *dev = &ts->client->dev;
+ int i;
+ int error;
+
+ ts->input_dev = devm_input_allocate_device(dev);
+ if (!ts->input_dev) {
+ dev_err(dev, "failed to allocate input device\n");
+ return -ENOMEM;
+ }
+
+ ts->input_dev->name = HIDEEP_TS_NAME;
+ ts->input_dev->id.bustype = BUS_I2C;
+ input_set_drvdata(ts->input_dev, ts);
+
+ input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
+ input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
+ input_set_abs_params(ts->input_dev, ABS_MT_PRESSURE, 0, 65535, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_TOOL_TYPE,
+ 0, MT_TOOL_MAX, 0, 0);
+ touchscreen_parse_properties(ts->input_dev, true, &ts->prop);
+
+ if (ts->prop.max_x == 0 || ts->prop.max_y == 0) {
+ error = hideep_get_axis_info(ts);
+ if (error)
+ return error;
+ }
+
+ error = input_mt_init_slots(ts->input_dev, HIDEEP_MT_MAX,
+ INPUT_MT_DIRECT);
+ if (error)
+ return error;
+
+ ts->key_num = device_property_read_u32_array(dev, "linux,keycodes",
+ NULL, 0);
+ if (ts->key_num > HIDEEP_KEY_MAX) {
+ dev_err(dev, "too many keys defined: %d\n",
+ ts->key_num);
+ return -EINVAL;
+ }
+
+ if (ts->key_num <= 0) {
+ dev_dbg(dev,
+ "missing or malformed 'linux,keycodes' property\n");
+ } else {
+ error = device_property_read_u32_array(dev, "linux,keycodes",
+ ts->key_codes,
+ ts->key_num);
+ if (error) {
+ dev_dbg(dev, "failed to read keymap: %d", error);
+ return error;
+ }
+
+ if (ts->key_num) {
+ ts->input_dev->keycode = ts->key_codes;
+ ts->input_dev->keycodesize = sizeof(ts->key_codes[0]);
+ ts->input_dev->keycodemax = ts->key_num;
+
+ for (i = 0; i < ts->key_num; i++)
+ input_set_capability(ts->input_dev, EV_KEY,
+ ts->key_codes[i]);
+ }
+ }
+
+ error = input_register_device(ts->input_dev);
+ if (error) {
+ dev_err(dev, "failed to register input device: %d", error);
+ return error;
+ }
+
+ return 0;
+}
+
+static ssize_t hideep_update_fw(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct hideep_ts *ts = i2c_get_clientdata(client);
+ const struct firmware *fw_entry;
+ char *fw_name;
+ int mode;
+ int error;
+
+ error = kstrtoint(buf, 0, &mode);
+ if (error)
+ return error;
+
+ fw_name = kasprintf(GFP_KERNEL, "hideep_ts_%04x.bin",
+ be16_to_cpu(ts->dwz_info.product_id));
+ if (!fw_name)
+ return -ENOMEM;
+
+ error = request_firmware(&fw_entry, fw_name, dev);
+ if (error) {
+ dev_err(dev, "failed to request firmware %s: %d",
+ fw_name, error);
+ goto out_free_fw_name;
+ }
+
+ if (fw_entry->size % sizeof(__be32)) {
+ dev_err(dev, "invalid firmware size %zu\n", fw_entry->size);
+ error = -EINVAL;
+ goto out_release_fw;
+ }
+
+ if (fw_entry->size > ts->fw_size) {
+ dev_err(dev, "fw size (%zu) is too big (memory size %d)\n",
+ fw_entry->size, ts->fw_size);
+ error = -EFBIG;
+ goto out_release_fw;
+ }
+
+ mutex_lock(&ts->dev_mutex);
+ disable_irq(client->irq);
+
+ error = hideep_update_firmware(ts, (const u32 *)fw_entry->data,
+ fw_entry->size);
+
+ enable_irq(client->irq);
+ mutex_unlock(&ts->dev_mutex);
+
+out_release_fw:
+ release_firmware(fw_entry);
+out_free_fw_name:
+ kfree(fw_name);
+
+ return error ?: count;
+}
+
+static ssize_t hideep_fw_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct hideep_ts *ts = i2c_get_clientdata(client);
+ ssize_t len;
+
+ mutex_lock(&ts->dev_mutex);
+ len = scnprintf(buf, PAGE_SIZE, "%04x\n",
+ be16_to_cpu(ts->dwz_info.release_ver));
+ mutex_unlock(&ts->dev_mutex);
+
+ return len;
+}
+
+static ssize_t hideep_product_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct hideep_ts *ts = i2c_get_clientdata(client);
+ ssize_t len;
+
+ mutex_lock(&ts->dev_mutex);
+ len = scnprintf(buf, PAGE_SIZE, "%04x\n",
+ be16_to_cpu(ts->dwz_info.product_id));
+ mutex_unlock(&ts->dev_mutex);
+
+ return len;
+}
+
+static DEVICE_ATTR(version, 0664, hideep_fw_version_show, NULL);
+static DEVICE_ATTR(product_id, 0664, hideep_product_id_show, NULL);
+static DEVICE_ATTR(update_fw, 0664, NULL, hideep_update_fw);
+
+static struct attribute *hideep_ts_sysfs_entries[] = {
+ &dev_attr_version.attr,
+ &dev_attr_product_id.attr,
+ &dev_attr_update_fw.attr,
+ NULL,
+};
+
+static const struct attribute_group hideep_ts_attr_group = {
+ .attrs = hideep_ts_sysfs_entries,
+};
+
+static int __maybe_unused hideep_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct hideep_ts *ts = i2c_get_clientdata(client);
+
+ disable_irq(client->irq);
+ hideep_power_off(ts);
+
+ return 0;
+}
+
+static int __maybe_unused hideep_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct hideep_ts *ts = i2c_get_clientdata(client);
+ int error;
+
+ error = hideep_power_on(ts);
+ if (error) {
+ dev_err(&client->dev, "power on failed");
+ return error;
+ }
+
+ enable_irq(client->irq);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(hideep_pm_ops, hideep_suspend, hideep_resume);
+
+static const struct regmap_config hideep_regmap_config = {
+ .reg_bits = 16,
+ .reg_format_endian = REGMAP_ENDIAN_LITTLE,
+ .val_bits = 16,
+ .val_format_endian = REGMAP_ENDIAN_LITTLE,
+ .max_register = 0xffff,
+};
+
+static int hideep_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct hideep_ts *ts;
+ int error;
+
+ /* check i2c bus */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "check i2c device error");
+ return -ENODEV;
+ }
+
+ if (client->irq <= 0) {
+ dev_err(&client->dev, "missing irq: %d\n", client->irq);
+ return -EINVAL;
+ }
+
+ ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ ts->client = client;
+ i2c_set_clientdata(client, ts);
+ mutex_init(&ts->dev_mutex);
+
+ ts->reg = devm_regmap_init_i2c(client, &hideep_regmap_config);
+ if (IS_ERR(ts->reg)) {
+ error = PTR_ERR(ts->reg);
+ dev_err(&client->dev,
+ "failed to initialize regmap: %d\n", error);
+ return error;
+ }
+
+ ts->vcc_vdd = devm_regulator_get(&client->dev, "vdd");
+ if (IS_ERR(ts->vcc_vdd))
+ return PTR_ERR(ts->vcc_vdd);
+
+ ts->vcc_vid = devm_regulator_get(&client->dev, "vid");
+ if (IS_ERR(ts->vcc_vid))
+ return PTR_ERR(ts->vcc_vid);
+
+ ts->reset_gpio = devm_gpiod_get_optional(&client->dev,
+ "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ts->reset_gpio))
+ return PTR_ERR(ts->reset_gpio);
+
+ error = hideep_power_on(ts);
+ if (error) {
+ dev_err(&client->dev, "power on failed: %d\n", error);
+ return error;
+ }
+
+ error = devm_add_action_or_reset(&client->dev, hideep_power_off, ts);
+ if (error)
+ return error;
+
+ error = hideep_load_dwz(ts);
+ if (error) {
+ dev_err(&client->dev, "failed to load dwz: %d", error);
+ return error;
+ }
+
+ error = hideep_init_input(ts);
+ if (error)
+ return error;
+
+ error = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, hideep_irq, IRQF_ONESHOT,
+ client->name, ts);
+ if (error) {
+ dev_err(&client->dev, "failed to request irq %d: %d\n",
+ client->irq, error);
+ return error;
+ }
+
+ error = devm_device_add_group(&client->dev, &hideep_ts_attr_group);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to add sysfs attributes: %d\n", error);
+ return error;
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id hideep_i2c_id[] = {
+ { HIDEEP_I2C_NAME, 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, hideep_i2c_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id hideep_acpi_id[] = {
+ { "HIDP0001", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, hideep_acpi_id);
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id hideep_match_table[] = {
+ { .compatible = "hideep,hideep-ts" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, hideep_match_table);
+#endif
+
+static struct i2c_driver hideep_driver = {
+ .driver = {
+ .name = HIDEEP_I2C_NAME,
+ .of_match_table = of_match_ptr(hideep_match_table),
+ .acpi_match_table = ACPI_PTR(hideep_acpi_id),
+ .pm = &hideep_pm_ops,
+ },
+ .id_table = hideep_i2c_id,
+ .probe = hideep_probe,
+};
+
+module_i2c_driver(hideep_driver);
+
+MODULE_DESCRIPTION("Driver for HiDeep Touchscreen Controller");
+MODULE_AUTHOR("anthony.kim@hideep.com");
+MODULE_LICENSE("GPL v2");