// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012-2017 Hideep, Inc.
*/
#include <linux/module.h>
#include <linux/of.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.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 <linux/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_WORK_MODE 0x081e
#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 128
#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 factory_id;
u8 panel_type;
u8 model_name[6];
__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) \
{ \
__be32 data = cpu_to_be32(0x01); \
hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CNT, (clk)); \
hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x03); \
/* \
* The first write may already cause a reset, use a raw \
* write for the second write to avoid error logging. \
*/ \
hideep_pgm_w_mem(ts, HIDEEP_SYSCON_WDT_CON, &data, 1); \
}
#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 int hideep_nvm_unlock(struct hideep_ts *ts)
{
u32 unmask_code;
int error;
hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_SFR_RPAGE);
error = hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code);
hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE);
if (error)
return error;
/* 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);
return 0;
}
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,
const __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 __be32 *ucode, size_t ucode_len)
{
struct pgm_packet *packet_r = (void *)ts->xfer_buf;
__be32 *current_ucode = packet_r->payload;
size_t xfer_len;
size_t xfer_count;
u32 addr = 0;
int error;
error = hideep_nvm_unlock(ts);
if (error)
return error;
while (ucode_len > 0) {
xfer_len = min_t(size_t, 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;
}
/* See if the page needs updating */
if (memcmp(ucode, current_ucode, xfer_len)) {
error = hideep_program_page(ts, addr,
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 __be32 *ucode, size_t ucode_len)
{
struct pgm_packet *packet_r = (void *)ts->xfer_buf;
__be32 *current_ucode = packet_r->payload;
size_t xfer_len;
size_t xfer_count;
u32 addr = 0;
int i;
int error;
while (ucode_len > 0) {
xfer_len = min_t(size_t, 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;
}
if (memcmp(ucode, current_ucode, xfer_len)) {
const u8 *ucode_bytes = (const u8 *)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 __be32 *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 __be32 *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_count_u32(dev, "linux,keycodes");
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 __be32 *)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 = sysfs_emit(buf, "%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 = sysfs_emit(buf, "%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_attrs[] = {
&dev_attr_version.attr,
&dev_attr_product_id.attr,
&dev_attr_update_fw.attr,
NULL,
};
ATTRIBUTE_GROUPS(hideep_ts);
static void hideep_set_work_mode(struct hideep_ts *ts)
{
/*
* Reset touch report format to the native HiDeep 20 protocol if requested.
* This is necessary to make touchscreens which come up in I2C-HID mode
* work with this driver.
*
* Note this is a kernel internal device-property set by x86 platform code,
* this MUST not be used in devicetree files without first adding it to
* the DT bindings.
*/
if (device_property_read_bool(&ts->client->dev, "hideep,force-native-protocol"))
regmap_write(ts->reg, HIDEEP_WORK_MODE, 0x00);
}
static int 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 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;
}
hideep_set_work_mode(ts);
enable_irq(client->irq);
return 0;
}
static DEFINE_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)
{
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;
}
hideep_set_work_mode(ts);
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;
}
return 0;
}
static const struct i2c_device_id hideep_i2c_id[] = {
{ HIDEEP_I2C_NAME },
{ }
};
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,
.dev_groups = hideep_ts_groups,
.of_match_table = of_match_ptr(hideep_match_table),
.acpi_match_table = ACPI_PTR(hideep_acpi_id),
.pm = pm_sleep_ptr(&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("[email protected]");
MODULE_LICENSE("GPL v2");
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