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Subject[PATCH] Input: add support for HiDeep touchscreen
Date
The HiDeep touchscreen device is a capacitive multi-touch controller
mainly for multi-touch supported devices use. It use I2C interface for
communication to IC and provide axis X, Y, Z locations for ten finger
touch through input event interface to userspace.

It support the Crimson and the Lime two type IC. They are different
the number of channel supported and FW size. But the working protocol
is same.

Signed-off-by: Anthony Kim <anthony.kim@hideep.com>
---
.../bindings/input/touchscreen/hideep.txt | 42 +
.../devicetree/bindings/vendor-prefixes.txt | 1 +
drivers/input/touchscreen/Kconfig | 11 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/hideep.c | 1274 ++++++++++++++++++++
5 files changed, 1329 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/touchscreen/hideep.txt
create mode 100644 drivers/input/touchscreen/hideep.c

diff --git a/Documentation/devicetree/bindings/input/touchscreen/hideep.txt b/Documentation/devicetree/bindings/input/touchscreen/hideep.txt
new file mode 100644
index 0000000..86b3a97
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/hideep.txt
@@ -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 = 1079;
+ touchscreen-size-y = 1919;
+ linux,keycodes = <KEY_HOME>, <KEY_MENU>, <KEY_BACK>;
+ };
+};
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index c03d201..aa2a301 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -131,6 +131,7 @@ 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.
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 64b30fe..d0c8dafc 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -344,6 +344,17 @@ 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
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 6badce8..873b67e 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_TOUCHSCREEN_EGALAX) += egalax_ts.o
obj-$(CONFIG_TOUCHSCREEN_EGALAX_SERIAL) += egalax_ts_serial.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
diff --git a/drivers/input/touchscreen/hideep.c b/drivers/input/touchscreen/hideep.c
new file mode 100644
index 0000000..388e41e
--- /dev/null
+++ b/drivers/input/touchscreen/hideep.c
@@ -0,0 +1,1274 @@
+/*
+ * 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/regulator/consumer.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/interrupt.h>
+#include <linux/sysfs.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.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
+#define FRAME_HEADER_SIZE 8
+
+/* Touch & key event */
+#define HIDEEP_EVENT_COUNT_ADDR 0x240
+#define HIDEEP_TOUCH_DATA_ADDR 0x242
+#define HIDEEP_KEY_DATA_ADDR 0x2A6
+#define HIDEEP_RAW_DATA_ADDR 0x1000
+
+/* command list */
+#define HIDEEP_RESET_CMD 0x9800
+#define HIDEEP_INTCLR_CMD 0x9802
+#define HIDEEP_OPMODE_CMD 0x9804
+#define HIDEEP_SWTICH_CMD 0x9805
+#define HIDEEP_SLEEP_CMD 0x980D
+
+/* multi touch event bit */
+#define HIDEEP_MT_ALWAYS_REPORT 0
+#define HIDEEP_MT_TOUCHED 1
+#define HIDEEP_MT_FIRST_CONTACT 2
+#define HIDEEP_MT_DRAG_MOVE 3
+#define HIDEEP_MT_RELEASED 4
+#define HIDEEP_MT_PINCH 5
+#define HIDEEP_MT_PRESSURE 6
+
+/* key event bit */
+#define HIDEEP_KEY_RELEASED 0x20
+#define HIDEEP_KEY_PRESSED 0x40
+#define HIDEEP_KEY_FIRST_PRESSED 0x80
+#define HIDEEP_KEY_PRESSED_MASK 0xC0
+
+/* For NVM */
+#define YRAM_BASE 0x40000000
+#define PERIPHERAL_BASE 0x50000000
+#define ESI_BASE (PERIPHERAL_BASE + 0x00000000)
+#define FLASH_BASE (PERIPHERAL_BASE + 0x01000000)
+#define SYSCON_BASE (PERIPHERAL_BASE + 0x02000000)
+
+#define SYSCON_MOD_CON (SYSCON_BASE + 0x0000)
+#define SYSCON_SPC_CON (SYSCON_BASE + 0x0004)
+#define SYSCON_CLK_CON (SYSCON_BASE + 0x0008)
+#define SYSCON_CLK_ENA (SYSCON_BASE + 0x000C)
+#define SYSCON_RST_CON (SYSCON_BASE + 0x0010)
+#define SYSCON_WDT_CON (SYSCON_BASE + 0x0014)
+#define SYSCON_WDT_CNT (SYSCON_BASE + 0x0018)
+#define SYSCON_PWR_CON (SYSCON_BASE + 0x0020)
+#define SYSCON_PGM_ID (SYSCON_BASE + 0x00F4)
+
+#define FLASH_CON (FLASH_BASE + 0x0000)
+#define FLASH_STA (FLASH_BASE + 0x0004)
+#define FLASH_CFG (FLASH_BASE + 0x0008)
+#define FLASH_TIM (FLASH_BASE + 0x000C)
+#define FLASH_CACHE_CFG (FLASH_BASE + 0x0010)
+#define FLASH_PIO_SIG (FLASH_BASE + 0x400000)
+
+#define ESI_TX_INVALID (ESI_BASE + 0x0008)
+
+#define PERASE 0x00040000
+#define WRONLY 0x00100000
+
+#define NVM_MASK_OFS 0x0000000C
+#define NVM_DEFAULT_PAGE 0
+#define NVM_SFR_WPAGE 1
+#define NVM_SFR_RPAGE 2
+
+#define PIO_SIG 0x00400000
+#define _PROT_MODE 0x03400000
+
+#define NVM_PAGE_SIZE 128
+
+#define HIDEEP_DWZ_INFO 0x000002C0
+
+enum e_dev_state {
+ state_init = 1,
+ state_normal,
+ state_sleep,
+ state_updating,
+};
+
+struct hideep_event {
+ __le16 x;
+ __le16 y;
+ __le16 z;
+ unsigned char w;
+ unsigned char flag;
+ unsigned char type;
+ unsigned char index;
+} __packed;
+
+struct dwz_info {
+ __le32 code_start;
+ unsigned char code_crc[12];
+
+ __le32 c_code_start;
+ __le16 c_code_len;
+ __le16 gen_ver;
+
+ __le32 vr_start;
+ __le16 vr_len;
+ __le16 rsv0;
+
+ __le32 ft_start;
+ __le16 ft_len;
+ __le16 vr_version;
+
+ __le16 boot_ver;
+ __le16 core_ver;
+ __le16 custom_ver;
+ __le16 release_ver;
+
+ unsigned char factory_id;
+ unsigned char panel_type;
+ unsigned char model_name[6];
+ __le16 product_code;
+ __le16 extra_option;
+
+ __le16 product_id;
+ __le16 vendor_id;
+} __packed;
+
+struct hideep_ts {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+
+ struct touchscreen_properties prop;
+
+ struct gpio_desc *reset_gpio;
+
+ struct regulator *vcc_vdd;
+ struct regulator *vcc_vid;
+
+ struct mutex dev_mutex;
+ struct mutex i2c_mutex;
+
+ enum e_dev_state dev_state;
+
+ unsigned int tch_count;
+ unsigned int key_count;
+ unsigned int lpm_count;
+
+ unsigned char touch_event[HIDEEP_MT_MAX * 10];
+ unsigned char key_event[HIDEEP_KEY_MAX * 2];
+
+ int key_num;
+ int key_codes[HIDEEP_KEY_MAX];
+
+ struct dwz_info dwz_info;
+
+ int fw_size;
+ int nvm_mask;
+} __packed;
+
+struct pgm_packet {
+ union {
+ unsigned char b[8];
+ __be32 w[2];
+ } header;
+
+ __be32 payload[NVM_PAGE_SIZE / sizeof(unsigned int)];
+};
+
+static void hideep_reset_ic(struct hideep_ts *ts);
+
+static int hideep_pgm_w_mem(struct hideep_ts *ts, unsigned int addr,
+ struct pgm_packet *packet, unsigned int len)
+{
+ int ret;
+ int i;
+
+ if ((len % sizeof(u32)) != 0)
+ return -EINVAL;
+
+ put_unaligned_be32((0x80 | (len / sizeof(u32) - 1)),
+ &packet->header.w[0]);
+ put_unaligned_be32(addr, &packet->header.w[1]);
+
+ for (i = 0; i < len / sizeof(u32); i++)
+ put_unaligned_be32(packet->payload[i], &packet->payload[i]);
+
+ ret = i2c_master_send(ts->client, &packet->header.b[3],
+ (len + 5));
+
+ return ret;
+}
+
+static int hideep_pgm_r_mem(struct hideep_ts *ts, unsigned int addr,
+ struct pgm_packet *packet, unsigned int len)
+{
+ int ret;
+ int i;
+ unsigned char buff[len]; // need to modify
+ struct i2c_msg msg[2];
+
+ if ((len % sizeof(u32)) != 0)
+ return -EINVAL;
+
+ put_unaligned_be32((0x00 | (len / sizeof(u32) - 1)),
+ &packet->header.w[0]);
+ put_unaligned_be32(addr, &packet->header.w[1]);
+
+ msg[0].addr = ts->client->addr;
+ msg[0].flags = 0;
+ msg[0].len = 5;
+ msg[0].buf = &packet->header.b[3];
+
+ msg[1].addr = ts->client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = len;
+ msg[1].buf = buff;
+
+ ret = i2c_transfer(ts->client->adapter, msg, 2);
+
+ if (ret < 0)
+ goto err;
+
+ for (i = 0; i < len / sizeof(u32); i++)
+ packet->payload[i] = get_unaligned_be32(&buff[i * sizeof(u32)]);
+
+err:
+ return ret;
+}
+
+static int hideep_pgm_r_reg(struct hideep_ts *ts, unsigned int addr,
+ unsigned int *val)
+{
+ int ret;
+ struct pgm_packet packet;
+
+ put_unaligned_be32(0x00, &packet.header.w[0]);
+ put_unaligned_be32(addr, &packet.header.w[1]);
+
+ ret = hideep_pgm_r_mem(ts, addr, &packet, sizeof(u32));
+
+ if (ret < 0)
+ goto err;
+
+ *val = packet.payload[0];
+
+err:
+ return ret;
+}
+
+static int hideep_pgm_w_reg(struct hideep_ts *ts, unsigned int addr,
+ unsigned int data)
+{
+ int ret;
+ struct pgm_packet packet;
+
+ put_unaligned_be32(0x80, &packet.header.w[0]);
+ put_unaligned_be32(addr, &packet.header.w[1]);
+ packet.payload[0] = data;
+
+ ret = hideep_pgm_w_mem(ts, addr, &packet, sizeof(u32));
+
+ return ret;
+}
+
+#define SW_RESET_IN_PGM(CLK) \
+{ \
+ hideep_pgm_w_reg(ts, SYSCON_WDT_CNT, CLK); \
+ hideep_pgm_w_reg(ts, SYSCON_WDT_CON, 0x03); \
+ hideep_pgm_w_reg(ts, SYSCON_WDT_CON, 0x01); \
+}
+
+#define SET_FLASH_PIO(CE) \
+ hideep_pgm_w_reg(ts, FLASH_CON, 0x01 | (CE << 1))
+#define SET_PIO_SIG(X, Y) \
+ hideep_pgm_w_reg(ts, FLASH_PIO_SIG + X, Y)
+#define SET_FLASH_HWCONTROL() \
+ hideep_pgm_w_reg(ts, 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, SYSCON_WDT_CON, 0x00);
+ hideep_pgm_w_reg(ts, SYSCON_SPC_CON, 0x00);
+ hideep_pgm_w_reg(ts, SYSCON_CLK_ENA, 0xFF);
+ hideep_pgm_w_reg(ts, SYSCON_CLK_CON, 0x01);
+ hideep_pgm_w_reg(ts, SYSCON_PWR_CON, 0x01);
+ hideep_pgm_w_reg(ts, FLASH_TIM, 0x03);
+ hideep_pgm_w_reg(ts, FLASH_CACHE_CFG, 0x00);
+}
+
+static int hideep_pgm_get_pattern(struct hideep_ts *ts)
+{
+ int ret;
+ unsigned int status;
+ const unsigned char pattern[] = { 0x39, 0xAF, 0x9D, 0xDF };
+
+ ret = i2c_master_send(ts->client, pattern, sizeof(pattern));
+
+ if (ret < 0) {
+ dev_err(&ts->client->dev, "%d, %08X", __LINE__, ret);
+ return ret;
+ }
+
+ mdelay(1);
+
+ /* flush invalid Tx load register */
+ ret = hideep_pgm_w_reg(ts, ESI_TX_INVALID, 0x01);
+
+ if (ret < 0)
+ return ret;
+
+ ret = hideep_pgm_r_reg(ts, SYSCON_PGM_ID, &status);
+
+ if (ret < 0)
+ return ret;
+
+ dev_info(&ts->client->dev, "%s, %08X", __func__, status);
+ return status;
+}
+
+static int hideep_enter_pgm(struct hideep_ts *ts)
+{
+ int retry_count = 10;
+ int val;
+ unsigned int pgm_pattern = 0xDF9DAF39;
+
+ while (retry_count--) {
+ val = hideep_pgm_get_pattern(ts);
+
+ if (pgm_pattern != get_unaligned_be32(&val)) {
+ dev_err(&ts->client->dev, "enter_pgm : error(%08x):",
+ get_unaligned_be32(&val));
+ } else {
+ dev_dbg(&ts->client->dev, "found magic code");
+ break;
+ }
+ }
+
+
+ if (retry_count < 0) {
+ dev_err(&ts->client->dev, "couldn't enter pgm mode!!!");
+ SW_RESET_IN_PGM(1000);
+ return -EBADMSG;
+ }
+
+ hideep_pgm_set(ts);
+ mdelay(1);
+
+ return 0;
+}
+
+static void hideep_nvm_unlock(struct hideep_ts *ts)
+{
+ unsigned int unmask_code = 0;
+
+ hideep_pgm_w_reg(ts, FLASH_CFG, NVM_SFR_RPAGE);
+
+ hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code);
+
+ hideep_pgm_w_reg(ts, FLASH_CFG, NVM_DEFAULT_PAGE);
+
+ /* make it unprotected code */
+ unmask_code &= (~_PROT_MODE);
+
+ /* compare unmask code */
+ if (unmask_code != ts->nvm_mask)
+ dev_dbg(&ts->client->dev, "read mask code different 0x%x",
+ unmask_code);
+
+ hideep_pgm_w_reg(ts, FLASH_CFG, NVM_SFR_WPAGE);
+ SET_FLASH_PIO(0);
+
+ NVM_W_SFR(NVM_MASK_OFS, ts->nvm_mask);
+ SET_FLASH_HWCONTROL();
+ hideep_pgm_w_reg(ts, FLASH_CFG, NVM_DEFAULT_PAGE);
+}
+
+static int hideep_check_status(struct hideep_ts *ts)
+{
+ int ret, status;
+ int time_out = 100;
+
+ while (time_out--) {
+ mdelay(1);
+ ret = hideep_pgm_r_reg(ts, FLASH_STA, &status);
+
+ if (ret < 0)
+ continue;
+
+ if (status)
+ return status;
+ }
+
+ return time_out;
+}
+
+static int hideep_program_page(struct hideep_ts *ts,
+ unsigned int addr, struct pgm_packet *packet_w)
+{
+ int ret;
+
+
+ ret = hideep_check_status(ts);
+
+ if (ret < 0)
+ return -EBUSY;
+
+ addr = addr & ~(NVM_PAGE_SIZE - 1);
+
+ SET_FLASH_PIO(0);
+ SET_FLASH_PIO(1);
+
+ /* erase page */
+ SET_PIO_SIG((PERASE | addr), 0xFFFFFFFF);
+
+ SET_FLASH_PIO(0);
+
+ ret = hideep_check_status(ts);
+
+ if (ret < 0)
+ return -EBUSY;
+
+ /* write page */
+ SET_FLASH_PIO(1);
+
+ SET_PIO_SIG((WRONLY | addr), get_unaligned_be32(&packet_w->payload[0]));
+
+ hideep_pgm_w_mem(ts, (FLASH_PIO_SIG | WRONLY),
+ packet_w, NVM_PAGE_SIZE);
+
+ SET_PIO_SIG(124, get_unaligned_be32(&packet_w->payload[31]));
+
+ SET_FLASH_PIO(0);
+
+ mdelay(1);
+
+ ret = hideep_check_status(ts);
+
+ if (ret < 0)
+ return -EBUSY;
+
+ SET_FLASH_HWCONTROL();
+
+ return 0;
+}
+
+static void hideep_program_nvm(struct hideep_ts *ts, const unsigned char *ucode,
+ int len)
+{
+ struct pgm_packet packet_w;
+ struct pgm_packet packet_r;
+ int i;
+ int ret;
+ int addr = 0;
+ int len_r = len;
+ int len_w = NVM_PAGE_SIZE;
+ unsigned int pages = DIV_ROUND_UP(len, NVM_PAGE_SIZE);
+
+
+ hideep_nvm_unlock(ts);
+
+ dev_dbg(&ts->client->dev, "pages : %d", pages);
+
+ for (i = 0; i < pages; i++) {
+ if (len_r < NVM_PAGE_SIZE)
+ len_w = len_r;
+
+ /* compare */
+ hideep_pgm_r_mem(ts, 0x00000000 + addr, &packet_r,
+ NVM_PAGE_SIZE);
+ ret = memcmp(&ucode[addr], packet_r.payload, len_w);
+
+ if (ret) {
+ /* write page */
+ memcpy(packet_w.payload, &ucode[addr], len_w);
+ ret = hideep_program_page(ts, addr, &packet_w);
+ if (ret)
+ dev_err(&ts->client->dev,
+ "%s : error(%08x):",
+ __func__, addr);
+ mdelay(1);
+ }
+
+ addr += NVM_PAGE_SIZE;
+ len_r -= NVM_PAGE_SIZE;
+ if (len_r < 0)
+ break;
+ }
+}
+
+static int hideep_verify_nvm(struct hideep_ts *ts, const unsigned char *ucode,
+ int len)
+{
+ struct pgm_packet packet_r;
+ int i, j;
+ int ret;
+ int addr = 0;
+ int len_r = len;
+ int len_v = NVM_PAGE_SIZE;
+ unsigned int pages = DIV_ROUND_UP(len, NVM_PAGE_SIZE);
+
+ for (i = 0; i < pages; i++) {
+ if (len_r < NVM_PAGE_SIZE)
+ len_v = len_r;
+
+ hideep_pgm_r_mem(ts, 0x00000000 + addr, &packet_r,
+ NVM_PAGE_SIZE);
+
+ ret = memcmp(&ucode[addr], packet_r.payload, len_v);
+
+ if (ret) {
+ u8 *read = (u8 *)packet_r.payload;
+
+ for (j = 0; j < NVM_PAGE_SIZE; j++) {
+ if (ucode[addr + j] != read[j])
+ dev_err(&ts->client->dev,
+ "verify : error([%d] %02x : %02x)",
+ addr + j, ucode[addr + j],
+ read[j]);
+ }
+ return ret;
+ }
+
+ addr += NVM_PAGE_SIZE;
+ len_r -= NVM_PAGE_SIZE;
+ if (len_r < 0)
+ break;
+ }
+
+ return 0;
+}
+
+static int hideep_update_firmware(struct hideep_ts *ts, const char *fn)
+{
+ int ret;
+ int retry, retry_cnt = 3;
+ const struct firmware *fw_entry;
+
+ dev_dbg(&ts->client->dev, "enter");
+ ret = request_firmware(&fw_entry, fn, &ts->client->dev);
+
+ if (ret != 0) {
+ dev_err(&ts->client->dev, "request_firmware : fail(%d)", ret);
+ return ret;
+ }
+
+ if (fw_entry->size > ts->fw_size) {
+ dev_err(&ts->client->dev,
+ "file size(%ld) is big more than fw memory size(%d)",
+ fw_entry->size, ts->fw_size);
+ release_firmware(fw_entry);
+ return -EFBIG;
+ }
+
+ /* chip specific code for flash fuse */
+ mutex_lock(&ts->dev_mutex);
+
+ ts->dev_state = state_updating;
+
+ /* enter program mode */
+ ret = hideep_enter_pgm(ts);
+
+ if (ret)
+ return ret;
+
+ /* comparing & programming each page, if the memory of specified
+ * page is exactly same, no need to update.
+ */
+ for (retry = 0; retry < retry_cnt; retry++) {
+ hideep_program_nvm(ts, fw_entry->data, fw_entry->size);
+
+ ret = hideep_verify_nvm(ts, fw_entry->data, fw_entry->size);
+ if (!ret)
+ break;
+ }
+
+ if (retry < retry_cnt)
+ dev_dbg(&ts->client->dev, "update success!!!");
+ else
+ dev_err(&ts->client->dev, "update failed!!!");
+
+ SW_RESET_IN_PGM(1000);
+
+ ts->dev_state = state_normal;
+
+ mutex_unlock(&ts->dev_mutex);
+
+ release_firmware(fw_entry);
+
+ return ret;
+}
+
+static int hideep_load_dwz(struct hideep_ts *ts)
+{
+ int ret = 0;
+ struct pgm_packet packet_r;
+
+ ret = hideep_enter_pgm(ts);
+
+ if (ret)
+ return ret;
+
+ mdelay(50);
+
+ hideep_pgm_r_mem(ts, HIDEEP_DWZ_INFO, &packet_r,
+ sizeof(struct dwz_info));
+
+ memcpy(&ts->dwz_info, packet_r.payload,
+ sizeof(struct dwz_info));
+
+ SW_RESET_IN_PGM(10);
+
+ if (get_unaligned_le16(&ts->dwz_info.product_code) & 0x60) {
+ /* Lime fw size */
+ dev_dbg(&ts->client->dev, "used lime IC");
+ ts->fw_size = 1024 * 64;
+ ts->nvm_mask = 0x0030027B;
+ } else if (get_unaligned_le16(&ts->dwz_info.product_code) & 0x40) {
+ /* Crimson IC */
+ dev_dbg(&ts->client->dev, "used crimson IC");
+ ts->fw_size = 1024 * 48;
+ ts->nvm_mask = 0x00310000;
+ }
+
+ dev_dbg(&ts->client->dev, "firmware release version : %04x",
+ get_unaligned_le16(&ts->dwz_info.release_ver));
+
+ mdelay(50);
+
+ return 0;
+}
+
+static int hideep_i2c_read(struct hideep_ts *ts, unsigned short addr,
+ unsigned short len, unsigned char *buf)
+{
+ int ret;
+ struct i2c_msg msg[2];
+
+ mutex_lock(&ts->i2c_mutex);
+
+ dev_dbg(&ts->client->dev, "addr = 0x%02x, len = %d", addr, len);
+
+ msg[0].addr = ts->client->addr;
+ msg[0].flags = 0;
+ msg[0].len = 2;
+ msg[0].buf = (u8 *)&addr;
+
+ msg[1].addr = ts->client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = len;
+ msg[1].buf = buf;
+
+ ret = i2c_transfer(ts->client->adapter, msg, 2);
+
+ mutex_unlock(&ts->i2c_mutex);
+ return ret;
+}
+
+static int hideep_i2c_write(struct hideep_ts *ts, unsigned short addr,
+ unsigned short len, unsigned char *buf)
+{
+ int ret;
+ unsigned char *wbuf;
+ struct i2c_msg msg;
+
+ dev_dbg(&ts->client->dev, "addr = 0x%02x, len = %d", addr, len);
+
+ wbuf = kmalloc(len + 2, GFP_KERNEL);
+
+ mutex_lock(&ts->i2c_mutex);
+
+ put_unaligned_le16(addr, &wbuf[0]);
+ memcpy(&wbuf[2], buf, len);
+
+ msg.addr = ts->client->addr;
+ msg.flags = 0;
+ msg.len = len + 2;
+ msg.buf = wbuf;
+
+ ret = i2c_transfer(ts->client->adapter, &msg, 1);
+
+ mutex_unlock(&ts->i2c_mutex);
+
+ kfree(wbuf);
+
+ return ret;
+}
+
+static void hideep_reset_ic(struct hideep_ts *ts)
+{
+ unsigned char cmd = 0x01;
+
+ if (!ts->reset_gpio) {
+ dev_dbg(&ts->client->dev, "hideep:enable the reset_gpio");
+ gpiod_set_value(ts->reset_gpio, GPIOD_OUT_LOW);
+ mdelay(20);
+ gpiod_set_value(ts->reset_gpio, GPIOD_OUT_HIGH);
+ } else {
+ hideep_i2c_write(ts, HIDEEP_RESET_CMD, 1, &cmd);
+ }
+ mdelay(50);
+}
+
+static int hideep_pwr_on(struct hideep_ts *ts)
+{
+ int ret = 0;
+
+ if (!ts->vcc_vdd) {
+ dev_dbg(&ts->client->dev, "hideep:vcc_vdd is enable");
+ ret = regulator_enable(ts->vcc_vdd);
+ if (ret)
+ dev_err(&ts->client->dev,
+ "Regulator vdd enable failed ret=%d", ret);
+ usleep_range(999, 1000);
+ }
+
+
+ if (!ts->vcc_vid) {
+ dev_dbg(&ts->client->dev, "hideep:vcc_vid is enable");
+ ret = regulator_enable(ts->vcc_vid);
+ if (ret)
+ dev_err(&ts->client->dev,
+ "Regulator vcc_vid enable failed ret=%d", ret);
+ usleep_range(2999, 3000);
+ }
+
+ return ret;
+}
+
+static void hideep_pwr_off(void *data)
+{
+ struct hideep_ts *ts = data;
+
+ if (!ts->reset_gpio)
+ gpiod_set_value(ts->reset_gpio, GPIOD_OUT_LOW);
+
+ if (!ts->vcc_vid)
+ regulator_disable(ts->vcc_vid);
+
+ if (!ts->vcc_vdd)
+ regulator_disable(ts->vcc_vdd);
+}
+
+#define __GET_MT_TOOL_TYPE(X) ((X == 0x01) ? MT_TOOL_FINGER : MT_TOOL_PEN)
+
+static void push_mt(struct hideep_ts *ts)
+{
+ int id;
+ int i;
+ bool btn_up = 0;
+ int evt = 0;
+ int offset = sizeof(struct hideep_event);
+ struct hideep_event *event;
+
+ /* load multi-touch event to input system */
+ for (i = 0; i < ts->tch_count; i++) {
+ event = (struct hideep_event *)&ts->touch_event[i * offset];
+ id = (event->index >> 0) & 0x0F;
+ btn_up = (event->flag >> HIDEEP_MT_RELEASED) & 0x01;
+
+ dev_dbg(&ts->client->dev,
+ "type = %d, id = %d, i = %d, x = %d, y = %d, z = %d",
+ event->type, event->index, i,
+ get_unaligned_le16(&event->x),
+ get_unaligned_le16(&event->y),
+ get_unaligned_le16(&event->z));
+
+ input_mt_slot(ts->input_dev, id);
+ input_mt_report_slot_state(ts->input_dev,
+ __GET_MT_TOOL_TYPE(event->type),
+ (btn_up == 0));
+
+ if (btn_up == 0) {
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_X,
+ get_unaligned_le16(&event->x));
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_Y,
+ get_unaligned_le16(&event->y));
+ input_report_abs(ts->input_dev, ABS_MT_PRESSURE,
+ get_unaligned_le16(&event->z));
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR,
+ event->w);
+ evt++;
+ }
+ }
+
+ input_mt_sync_frame(ts->input_dev);
+}
+
+static void push_ky(struct hideep_ts *ts)
+{
+ int i;
+ int status;
+ int code;
+
+ for (i = 0; i < ts->key_count; i++) {
+ code = ts->key_event[i + i * 2] & 0x0F;
+ status = ts->key_event[i + i * 2] & 0xF0;
+
+ input_report_key(ts->input_dev, ts->key_codes[code],
+ status & HIDEEP_KEY_PRESSED_MASK);
+ }
+}
+
+static void hideep_put_event(struct hideep_ts *ts)
+{
+ /* mangling touch information */
+ if (ts->tch_count > 0)
+ push_mt(ts);
+
+ if (ts->key_count > 0)
+ push_ky(ts);
+
+ input_sync(ts->input_dev);
+}
+
+static int hideep_get_event(struct hideep_ts *ts)
+{
+ int ret;
+ int touch_count;
+ int event_size;
+
+ /* get touch event count */
+ dev_dbg(&ts->client->dev, "mt = %d, key = %d, lpm = %02x",
+ ts->tch_count, ts->key_count, ts->lpm_count);
+
+ /* get touch event information */
+ if (ts->tch_count > HIDEEP_MT_MAX)
+ ts->tch_count = 0;
+
+ if (ts->key_count > HIDEEP_KEY_MAX)
+ ts->key_count = 0;
+
+ touch_count = ts->tch_count + ts->key_count;
+
+ if (ts->tch_count > 0) {
+ event_size = ts->tch_count *
+ sizeof(struct hideep_event);
+ ret = hideep_i2c_read(ts, HIDEEP_TOUCH_DATA_ADDR,
+ event_size, ts->touch_event);
+
+ if (ret < 0) {
+ dev_err(&ts->client->dev, "read I2C error.");
+ return ret;
+ }
+ }
+
+ if (ts->key_count > 0) {
+ event_size = ts->key_count * 2;
+ ret = hideep_i2c_read(ts, HIDEEP_KEY_DATA_ADDR,
+ event_size, ts->key_event);
+ if (ret < 0) {
+ dev_err(&ts->client->dev, "read I2C error.");
+ return ret;
+ }
+ }
+
+ return touch_count;
+}
+
+static irqreturn_t hideep_irq_task(int irq, void *handle)
+{
+ unsigned char buff[2];
+ int ret;
+
+ struct hideep_ts *ts = handle;
+
+ dev_dbg(&ts->client->dev, "state = 0x%x", ts->dev_state);
+
+ if (ts->dev_state == state_normal) {
+ ret = hideep_i2c_read(ts, HIDEEP_EVENT_COUNT_ADDR,
+ 2, buff);
+
+ if (ret < 0) {
+ disable_irq(ts->client->irq);
+ return IRQ_HANDLED;
+ }
+
+ ts->tch_count = buff[0];
+ ts->key_count = buff[1] & 0x0f;
+ ts->lpm_count = buff[1] & 0xf0;
+
+ ret = hideep_get_event(ts);
+
+ if (ret >= 0)
+ hideep_put_event(ts);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int hideep_capability(struct hideep_ts *ts)
+{
+ int ret, i;
+
+ ts->input_dev->name = HIDEEP_TS_NAME;
+ ts->input_dev->id.bustype = BUS_I2C;
+
+ 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]);
+ }
+
+ input_set_abs_params(ts->input_dev,
+ ABS_MT_TOOL_TYPE, 0, MT_TOOL_MAX, 0, 0);
+ input_set_abs_params(ts->input_dev,
+ ABS_MT_POSITION_X, 0, ts->prop.max_x, 0, 0);
+ input_set_abs_params(ts->input_dev,
+ ABS_MT_POSITION_Y, 0, ts->prop.max_y, 0, 0);
+ 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);
+
+ ret = input_mt_init_slots(ts->input_dev,
+ HIDEEP_MT_MAX, INPUT_MT_DIRECT);
+
+ return ret;
+}
+
+static void hideep_get_info(struct hideep_ts *ts)
+{
+ unsigned char val[4];
+
+ if (ts->prop.max_x == 0 || ts->prop.max_y == 0) {
+ hideep_i2c_read(ts, 0x28, 4, val);
+
+ ts->prop.max_x = get_unaligned_le16(&val[2]);
+ ts->prop.max_y = get_unaligned_le16(&val[0]);
+
+ dev_info(&ts->client->dev, "X : %d, Y : %d",
+ ts->prop.max_x, ts->prop.max_y);
+ }
+}
+
+static ssize_t hideep_update_fw(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct hideep_ts *ts = dev_get_drvdata(dev);
+ int mode, ret;
+ char *fw_name;
+
+ ret = kstrtoint(buf, 8, &mode);
+ if (ret)
+ return ret;
+
+ disable_irq(ts->client->irq);
+
+ ts->dev_state = state_updating;
+ fw_name = kasprintf(GFP_KERNEL, "hideep_ts_%04x.bin",
+ get_unaligned_le16(&ts->dwz_info.product_id));
+ ret = hideep_update_firmware(ts, fw_name);
+
+ if (ret != 0)
+ dev_err(dev, "The firmware update failed(%d)", ret);
+
+ kfree(fw_name);
+
+ ret = hideep_load_dwz(ts);
+
+ if (ret < 0)
+ dev_err(&ts->client->dev, "fail to load dwz, ret = 0x%x", ret);
+
+ enable_irq(ts->client->irq);
+
+ ts->dev_state = state_normal;
+
+ return count;
+}
+
+static ssize_t hideep_fw_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int len = 0;
+ struct hideep_ts *ts = dev_get_drvdata(dev);
+
+ dev_info(dev, "release version : %04x",
+ get_unaligned_le16(&ts->dwz_info.release_ver));
+
+ mutex_lock(&ts->dev_mutex);
+ len = scnprintf(buf, PAGE_SIZE,
+ "%04x\n", get_unaligned_le16(&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)
+{
+ int len = 0;
+ struct hideep_ts *ts = dev_get_drvdata(dev);
+
+ dev_info(dev, "product id : %04x",
+ get_unaligned_le16(&ts->dwz_info.product_id));
+
+ mutex_lock(&ts->dev_mutex);
+ len = scnprintf(buf, PAGE_SIZE,
+ "%04x\n", get_unaligned_le16(&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 struct attribute_group hideep_ts_attr_group = {
+ .attrs = hideep_ts_sysfs_entries,
+};
+
+static int __maybe_unused hideep_resume(struct device *dev)
+{
+ struct hideep_ts *ts = dev_get_drvdata(dev);
+ unsigned char sleep_cmd = 0x00;
+
+ mutex_lock(&ts->dev_mutex);
+
+ if (ts->dev_state != state_normal)
+ ts->dev_state = state_normal;
+
+ hideep_i2c_write(ts, HIDEEP_SLEEP_CMD, 1, &sleep_cmd);
+ enable_irq(ts->client->irq);
+
+ mdelay(10);
+ hideep_reset_ic(ts);
+
+ mutex_unlock(&ts->dev_mutex);
+ return 0;
+}
+
+static int __maybe_unused hideep_suspend(struct device *dev)
+{
+ struct hideep_ts *ts = dev_get_drvdata(dev);
+ unsigned char sleep_cmd = 0x01;
+
+ mutex_lock(&ts->dev_mutex);
+
+ if (ts->dev_state != state_sleep)
+ ts->dev_state = state_sleep;
+
+ /* default deep sleep */
+ hideep_i2c_write(ts, HIDEEP_SLEEP_CMD, 1, &sleep_cmd);
+ disable_irq(ts->client->irq);
+
+ mutex_unlock(&ts->dev_mutex);
+ return 0;
+}
+
+static int hideep_parse_dts(struct device *dev, struct hideep_ts *ts)
+{
+ int ret;
+
+ ts->reset_gpio = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ts->reset_gpio))
+ return PTR_ERR(ts->reset_gpio);
+
+ ts->vcc_vdd = devm_regulator_get(dev, "vdd");
+ if (IS_ERR(ts->vcc_vdd))
+ return PTR_ERR(ts->vcc_vdd);
+
+ ts->vcc_vid = devm_regulator_get(dev, "vid");
+ if (IS_ERR(ts->vcc_vid))
+ return PTR_ERR(ts->vcc_vid);
+
+ 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 support key defined(%d)!!!",
+ ts->key_num);
+ return -EINVAL;
+ }
+
+ ret = device_property_read_u32_array(dev, "linux,keycodes",
+ ts->key_codes, ts->key_num);
+ if (ret) {
+ dev_dbg(dev, "don't support touch key");
+ ts->key_num = 0;
+ }
+
+ return 0;
+}
+
+static int hideep_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret = 0;
+ struct hideep_ts *ts;
+
+ /* check i2c bus */
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "check i2c device error");
+ return -ENODEV;
+ }
+
+ /* init hideep_ts */
+ ts = devm_kzalloc(&client->dev,
+ sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ ret = hideep_parse_dts(&client->dev, ts);
+
+ if (ret)
+ return ret;
+
+ ts->client = client;
+
+ i2c_set_clientdata(client, ts);
+
+ mutex_init(&ts->i2c_mutex);
+ mutex_init(&ts->dev_mutex);
+
+ /* power on */
+ ret = hideep_pwr_on(ts);
+ if (ret) {
+ dev_err(&ts->client->dev, "power on failed");
+ return ret;
+ }
+
+ ret = devm_add_action(&ts->client->dev, hideep_pwr_off, ts);
+ if (ret) {
+ hideep_pwr_off(ts);
+ return ret;
+ }
+
+ ts->dev_state = state_init;
+ mdelay(30);
+
+ /* ic reset */
+ hideep_reset_ic(ts);
+
+ /* read info */
+ ret = hideep_load_dwz(ts);
+ if (ret < 0) {
+ dev_err(&client->dev, "fail to load dwz, ret = 0x%x", ret);
+ return ret;
+ }
+
+ /* init input device */
+ ts->input_dev = devm_input_allocate_device(&client->dev);
+ if (!ts->input_dev) {
+ dev_err(&client->dev, "can't allocate memory for input_dev");
+ return -ENOMEM;
+ }
+
+ touchscreen_parse_properties(ts->input_dev, true, &ts->prop);
+ hideep_get_info(ts);
+
+ ret = hideep_capability(ts);
+ if (ret) {
+ dev_err(&client->dev, "can't init input properties");
+ return ret;
+ }
+
+ ret = input_register_device(ts->input_dev);
+ if (ret) {
+ dev_err(&client->dev, "can't register input_dev");
+ return ret;
+ }
+
+ input_set_drvdata(ts->input_dev, ts);
+
+ dev_info(&ts->client->dev, "ts irq: %d", ts->client->irq);
+ if (IS_ERR(&ts->client->irq)) {
+ dev_err(&client->dev, "can't be assigned irq");
+ return -ENOMEM;
+ }
+
+ ret = devm_request_threaded_irq(&client->dev, ts->client->irq,
+ NULL, hideep_irq_task, IRQF_ONESHOT,
+ ts->client->name, ts);
+
+ disable_irq(ts->client->irq);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "fail to get irq, ret = 0x%08x",
+ ret);
+ return ret;
+ }
+
+ ts->dev_state = state_normal;
+ enable_irq(ts->client->irq);
+
+ ret = devm_device_add_group(&client->dev, &hideep_ts_attr_group);
+
+ if (ret) {
+ dev_err(&client->dev, "fail init sys, ret = 0x%x", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(hideep_pm_ops, hideep_suspend, hideep_resume);
+
+static const struct i2c_device_id hideep_dev_idtable[] = {
+ { HIDEEP_I2C_NAME, 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, hideep_dev_idtable);
+
+#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 = {
+ .probe = hideep_probe,
+ .id_table = hideep_dev_idtable,
+ .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,
+ },
+};
+
+module_i2c_driver(hideep_driver);
+
+MODULE_DESCRIPTION("Driver for HiDeep Touchscreen Controller");
+MODULE_AUTHOR("anthony.kim@hideep.com");
+MODULE_LICENSE("GPL v2");
--
2.7.4
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  Last update: 2017-09-11 09:28    [W:0.187 / U:3.508 seconds]
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