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Subject[PATCH] driver: input :touchscreen : add Raydium I2C touch driver
Date
Raydium I2C touch driver.

Signed-off-by: jeffrey.lin <jeffrey.lin@rad-ic.com>
---
drivers/input/touchscreen/Kconfig | 12 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/raydium_i2c_ts.c | 932 +++++++++++++++++++++++++++++
3 files changed, 945 insertions(+)
create mode 100644 drivers/input/touchscreen/raydium_i2c_ts.c

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 3f3f6ee..df0e2ed 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -915,6 +915,18 @@ config TOUCHSCREEN_PCAP
To compile this driver as a module, choose M here: the
module will be called pcap_ts.

+config TOUCHSCREEN_RM_TS
+ tristate "Raydium I2C Touchscreen"
+ depends on I2C
+ help
+ Say Y here if you have Raydium series I2C touchscreen,
+ such as RM32380,connected to your system.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called raydium_i2c_ts.
+
config TOUCHSCREEN_ST1232
tristate "Sitronix ST1232 touchscreen controllers"
depends on I2C
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 4941f2d..99e08cf 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o
obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
obj-$(CONFIG_TOUCHSCREEN_PIXCIR) += pixcir_i2c_ts.o
+obj-$(CONFIG_TOUCHSCREEN_RM_TS) += raydium_i2c_ts.o
obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o
obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o
diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c b/drivers/input/touchscreen/raydium_i2c_ts.c
new file mode 100644
index 0000000..e1ff49a
--- /dev/null
+++ b/drivers/input/touchscreen/raydium_i2c_ts.c
@@ -0,0 +1,932 @@
+/*
+ * Raydium touchscreen I2C driver.
+ *
+ * Copyright (C) 2012-2014, Raydium Semiconductor Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Raydium reserves the right to make changes without further notice
+ * to the materials described herein. Raydium does not assume any
+ * liability arising out of the application described herein.
+ *
+ * Contact Raydium Semiconductor Corporation at www.rad-ic.com
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/firmware.h>
+#include <linux/input/mt.h>
+#include <linux/acpi.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+#include <asm/unaligned.h>
+#include <linux/gpio/consumer.h>
+
+/* Device, Driver information */
+#define DEVICE_NAME "rm_ts"
+
+/* Slave I2C mode*/
+#define RM_BOOT_BLDR 0x02
+#define RM_BOOT_MAIN 0x03
+
+/*I2C command */
+#define CMD_QUERY_BANK 0x2B
+#define CMD_DATA_BANK 0x4D
+#define CMD_ENTER_SLEEP 0x4E
+#define CMD_BOOT_ACK 0x0A
+#define CMD_BOOT_WRT 0x5B
+#define CMD_BOOT_CHK 0x0C
+#define CMD_BANK_SWITCH 0xAA
+
+/* Touch relative info */
+#define MAX_RETRIES 3
+#define MAX_FW_UPDATE_RETRIES 30
+#define MAX_TOUCH_NUM 10
+#define MAX_PACKET_SIZE 60
+#define BOOT_DELAY_MS 100
+
+#define RAYDIUM_FW_PAGESIZE 128
+#define RAYDIUM_POWERON_DELAY_USEC 500
+#define RAYDIUM_RESET_DELAY_MSEC 50
+
+#define ADDR_INDEX 0x03
+#define DATA_INDEX 0x04
+
+#define HEADER_SIZE 4
+
+enum raydium_boot_mode {
+ RAYDIUM_TS_MAIN = 0,
+ RAYDIUM_TS_BLDR,
+};
+
+enum raydium_abs_idx {
+ POS_STATE = 0,/*1:touch, 0:no touch*/
+ POS_X,
+ POS_Y = 3,
+ POS_PRESSURE,
+ WIDTH_X,
+ WIDTH_Y,
+};
+
+struct raydium_info {
+ u32 hw_ver; /*device ver, __le32*/
+ u8 main_ver;
+ u8 sub_ver;
+ u16 ft_ver; /*test ver, __le16*/
+ u8 x_num;
+ u8 y_num;
+ u16 x_max; /*disp reso, __le16*/
+ u16 y_max; /*disp reso, __le16*/
+ u8 x_res; /* units/mm */
+ u8 y_res; /* units/mm */
+};
+
+struct raydium_object {
+ u32 data_bank_addr;
+ u8 pkg_size;
+ u8 tp_info_size;
+};
+
+/* struct raydium_data - represents state of Raydium touchscreen device */
+struct raydium_data {
+ struct i2c_client *client;
+ struct input_dev *input;
+
+ struct regulator *avdd;
+ struct regulator *vccio;
+ struct gpio_desc *reset_gpio;
+
+ u32 query_bank_info;
+
+ struct raydium_info info;
+ struct raydium_object obj;
+ enum raydium_boot_mode boot_mode;
+
+ struct mutex sysfs_mutex;
+ struct completion cmd_done;
+
+ bool wake_irq_enabled;
+};
+
+static int raydium_i2c_send(struct i2c_client *client,
+ u8 addr, u8 *data, size_t len)
+{
+ u8 buf[MAX_PACKET_SIZE + 1];
+ int tries = 0;
+
+ if (len > MAX_PACKET_SIZE)
+ return -EINVAL;
+
+ buf[0] = addr;
+ memcpy(&buf[1], data, len);
+
+ do {
+ if (i2c_master_send(client, buf, len + 1) == (len + 1))
+ return 0;
+ msleep(20);
+ } while (++tries < MAX_RETRIES);
+
+ dev_err(&client->dev, "%s: i2c send failed\n", __func__);
+
+ return -EIO;
+}
+
+static int raydium_i2c_read(struct i2c_client *client,
+ u8 addr, size_t len, void *data)
+{
+ struct i2c_msg xfer[2];
+ int ret;
+
+ /* Write register */
+ xfer[0].addr = client->addr;
+ xfer[0].flags = 0;
+ xfer[0].len = 1;
+ xfer[0].buf = &addr;
+
+ /* Read data */
+ xfer[1].addr = client->addr;
+ xfer[1].flags = I2C_M_RD;
+ xfer[1].len = len;
+ xfer[1].buf = data;
+
+ ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer));
+ if (ret < 0)
+ return ret;
+
+ if (ret != ARRAY_SIZE(xfer))
+ return -EIO;
+
+ return 0;
+}
+
+static int raydium_i2c_read_message(struct i2c_client *client,
+ u32 addr, size_t len, void *data)
+{
+ u16 pkg_size, use_len;
+ u8 buf[HEADER_SIZE], idx_i;
+ int error;
+
+ use_len = len;
+ idx_i = 0;
+ while (use_len > 0) {
+ pkg_size = (use_len < MAX_PACKET_SIZE) ?
+ use_len : MAX_PACKET_SIZE;
+
+ put_unaligned_be32(addr, buf);
+
+ /*set data bank*/
+ error = raydium_i2c_send(client, CMD_BANK_SWITCH,
+ (u8 *)buf, HEADER_SIZE);
+ /*read potints data*/
+ if (!error)
+ error = raydium_i2c_read(client, buf[ADDR_INDEX],
+ pkg_size,
+ data + idx_i*MAX_PACKET_SIZE);
+
+ pkg_size += MAX_PACKET_SIZE;
+ addr += MAX_PACKET_SIZE;
+ use_len = (use_len < MAX_PACKET_SIZE) ?
+ 0 : (use_len - MAX_PACKET_SIZE);
+ idx_i++;
+ }
+
+ return error;
+}
+
+static int raydium_i2c_send_message(struct i2c_client *client,
+ size_t len, void *data)
+{
+ int error;
+ __le32 cmd;
+
+ cmd = get_unaligned_le32(data);
+
+ /*set data bank*/
+ error = raydium_i2c_send(client, CMD_BANK_SWITCH, (u8 *)&cmd,
+ HEADER_SIZE);
+
+ /*send message*/
+ if (!error)
+ error = raydium_i2c_send(client, ((u8 *)data)[ADDR_INDEX],
+ data + DATA_INDEX, len);
+
+ return error;
+}
+
+static int raydium_i2c_sw_reset(struct i2c_client *client)
+{
+ static const u8 soft_rst_cmd[] = {0x40, 0x00, 0x00, 0x04, 0x01};
+ int error;
+
+ error = raydium_i2c_send_message(client, ARRAY_SIZE(soft_rst_cmd),
+ (void *)soft_rst_cmd);
+ if (error) {
+ dev_err(&client->dev, "software reset failed: %d\n", error);
+ return error;
+ }
+
+ msleep(RAYDIUM_RESET_DELAY_MSEC);
+
+ return 0;
+}
+
+static int raydium_i2c_query_ts_info(struct raydium_data *ts)
+{
+ struct i2c_client *client = ts->client;
+ int error, retry_cnt;
+
+ for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
+ error = raydium_i2c_read(client, CMD_DATA_BANK,
+ sizeof(ts->obj), (void *)&ts->obj);
+ ts->obj.data_bank_addr =
+ get_unaligned_le32(&ts->obj.data_bank_addr);
+
+ if (!error) {
+ error = raydium_i2c_read(client, CMD_QUERY_BANK,
+ sizeof(ts->query_bank_info),
+ (void *)&ts->query_bank_info);
+ if (!error) {
+ error = raydium_i2c_read_message(client,
+ ts->query_bank_info, sizeof(ts->info),
+ (void *)&ts->info);
+
+ ts->info.hw_ver =
+ get_unaligned_le32(&ts->info.hw_ver);
+ ts->info.ft_ver =
+ get_unaligned_le16(&ts->info.ft_ver);
+ ts->info.x_max =
+ get_unaligned_le16(&ts->info.x_max);
+ ts->info.y_max =
+ get_unaligned_le16(&ts->info.y_max);
+
+ return 0;
+ }
+ }
+ }
+ dev_err(&client->dev, "Get touch data failed: %d\n", error);
+
+ return -EINVAL;
+}
+
+static int raydium_i2c_fastboot(struct i2c_client *client)
+{
+ static const u8 boot_cmd[] = { 0x50, 0x00, 0x06, 0x20 };
+ u8 buf[HEADER_SIZE];
+ int error;
+
+ error = raydium_i2c_read_message(client,
+ get_unaligned_be32(boot_cmd),
+ sizeof(boot_cmd), buf);
+
+ if (!error) {
+ if (buf[0] == RM_BOOT_BLDR) {
+ dev_dbg(&client->dev, "boot in fastboot mode\n");
+ return -EINVAL;
+ }
+ dev_dbg(&client->dev, "boot success -- 0x%x\n", client->addr);
+ return 0;
+ }
+
+ dev_err(&client->dev, "boot failed: %d\n", error);
+
+ return error;
+}
+
+static int raydium_i2c_initialize(struct raydium_data *ts)
+{
+ struct i2c_client *client = ts->client;
+ int error, retry_cnt;
+ static const u8 recov_packet[] = { 0x04, 0x81 };
+ u8 buf[HEADER_SIZE];
+
+ for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
+ error = raydium_i2c_fastboot(client);
+ if (error) {
+ /* Continue initializing if it's the last try */
+ if (retry_cnt < MAX_RETRIES - 1)
+ continue;
+ }
+ /* Wait for Hello packet */
+ msleep(BOOT_DELAY_MS);
+
+ error = raydium_i2c_read(client, recov_packet[0], 1,
+ (void *)buf);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to read 'hello' packet: %d\n", error);
+ } else if (buf[0] == recov_packet[1]) {
+ ts->boot_mode = RAYDIUM_TS_MAIN;
+ break;
+ }
+ }
+
+ if (error)
+ ts->boot_mode = RAYDIUM_TS_BLDR;
+ else
+ raydium_i2c_query_ts_info(ts);
+
+ return error;
+}
+
+static int raydium_i2c_fw_write_page(struct i2c_client *client,
+ const void *page)
+{
+ static const u8 ack_ok[] = { 0x55, 0xAA };
+ u8 buf[2];
+ int retry;
+ int error;
+
+ for (retry = 0; retry < MAX_FW_UPDATE_RETRIES; retry++) {
+ error = raydium_i2c_send(client, CMD_BOOT_WRT,
+ (u8 *)page, RAYDIUM_FW_PAGESIZE);
+ if (error) {
+ dev_err(&client->dev,
+ "BLDR Write Page failed: %d\n", error);
+ continue;
+ }
+
+ error = raydium_i2c_read(client, CMD_BOOT_CHK, sizeof(ack_ok),
+ (void *)buf);
+ if (error) {
+ dev_err(&client->dev,
+ "BLDR Ack read failed: %d\n", error);
+ return error;
+ }
+
+ if (!memcmp(buf, ack_ok, sizeof(ack_ok)))
+ return 0;
+
+ error = -EIO;
+ dev_err(&client->dev,
+ "BLDR Get Ack Error [%02x:%02x]\n", buf[0], buf[1]);
+ }
+
+ return error;
+}
+
+static int raydium_i2c_do_update_firmware(struct i2c_client *client,
+ const struct firmware *fw,
+ bool force)
+{
+ static const u8 boot_cmd[] = { 0x50, 0x00, 0x06, 0x20 , RM_BOOT_BLDR };
+ static const u8 main_cmd[] = { 0x50, 0x00, 0x06, 0x20, RM_BOOT_MAIN };
+ static const u8 boot_ack[] = { 0x55, 0xAA, 0x00, 0xFF };
+ u8 buf[HEADER_SIZE];
+ int page, n_fw_pages;
+ int error;
+
+ /* Recovery mode detection! */
+ if (!force) {
+ /* Start boot loader Procedure */
+ dev_dbg(&client->dev, "Normal BLDR procedure\n");
+ /* switch to mode */
+ error = raydium_i2c_send_message(client, 1, (void *)boot_cmd);
+ if (error)
+ dev_err(&client->dev, "failed to send boot cmd: %d\n",
+ error);
+ msleep(60);
+ raydium_i2c_sw_reset(client);
+ msleep(RAYDIUM_RESET_DELAY_MSEC);
+ error = raydium_i2c_send_message(client, 1, (void *)boot_cmd);
+ }
+
+ if (error) {
+ dev_err(&client->dev, "failed to enter fastboot mode: %d\n",
+ error);
+ return error;
+ }
+
+ msleep(20);
+
+ /* check fastboot state */
+ error = raydium_i2c_read(client, CMD_BOOT_ACK,
+ sizeof(boot_ack), (void *)buf);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to read boot ack: %d\n", error);
+ return error;
+ }
+
+ if (memcmp(buf, boot_ack, sizeof(boot_ack))) {
+ dev_err(&client->dev,
+ "failed to enter fastboot: %*ph (expected %*ph)\n",
+ (int)sizeof(buf), buf, (int)sizeof(boot_ack), boot_ack);
+ return -EIO;
+ }
+
+ dev_info(&client->dev, "successfully entered fastboot mode");
+
+ n_fw_pages = fw->size / RAYDIUM_FW_PAGESIZE;
+ dev_dbg(&client->dev, "BLDR Pages = %d\n", n_fw_pages);
+
+ for (page = 0; page < n_fw_pages; page++) {
+ error = raydium_i2c_fw_write_page(client,
+ fw->data + page * RAYDIUM_FW_PAGESIZE);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to write FW page %d: %d\n",
+ page, error);
+ return error;
+ }
+ }
+ error = raydium_i2c_send_message(client, 1, (void *)main_cmd);
+ msleep(20);
+ raydium_i2c_sw_reset(client);
+ dev_info(&client->dev, "firmware update completed\n");
+
+ return 0;
+}
+
+static int raydium_i2c_fw_update(struct raydium_data *ts)
+{
+ struct i2c_client *client = ts->client;
+ const struct firmware *fw;
+ char *fw_name;
+ int error;
+
+ fw_name = kasprintf(GFP_KERNEL, "raydium_i2c_%04x.bin",
+ ts->info.hw_ver & 0xFFFF);
+ if (!fw_name)
+ return -ENOMEM;
+
+ dev_info(&client->dev, "requesting fw name = %s\n", fw_name);
+ error = request_firmware(&fw, fw_name, &client->dev);
+ kfree(fw_name);
+ if (error) {
+ dev_err(&client->dev, "failed to request firmware: %d\n",
+ error);
+ return error;
+ }
+
+ if (fw->size % RAYDIUM_FW_PAGESIZE) {
+ dev_err(&client->dev, "invalid firmware length: %zu\n",
+ fw->size);
+ error = -EINVAL;
+ goto out;
+ }
+
+ disable_irq(client->irq);
+ error = raydium_i2c_do_update_firmware(client, fw,
+ ts->boot_mode == RAYDIUM_TS_BLDR);
+ if (error) {
+ dev_err(&client->dev, "firmware update failed: %d\n", error);
+ ts->boot_mode = RAYDIUM_TS_BLDR;
+ goto out_enable_irq;
+ }
+ error = raydium_i2c_initialize(ts);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to initialize device after firmware update: %d\n",
+ error);
+ ts->boot_mode = RAYDIUM_TS_BLDR;
+ goto out_enable_irq;
+ }
+
+ ts->boot_mode = RAYDIUM_TS_MAIN;
+
+out_enable_irq:
+ enable_irq(client->irq);
+ msleep(100);
+out:
+ release_firmware(fw);
+ return error;
+}
+
+static void raydium_mt_event(struct raydium_data *ts)
+{
+ u8 data[MAX_PACKET_SIZE];
+ int error, i;
+ int x, y, f_state, pressure, wx, wy;
+
+ error = raydium_i2c_read_message(ts->client, ts->obj.data_bank_addr,
+ ts->obj.pkg_size, (void *)data);
+
+ if (error < 0) {
+ dev_err(&ts->client->dev, "%s: failed to read data: %d\n",
+ __func__, error);
+ return;
+ }
+
+ for (i = 0; i < MAX_TOUCH_NUM; i++) {
+ f_state = (data + i * ts->obj.tp_info_size)[POS_STATE];
+ pressure = (data + i * ts->obj.tp_info_size)[POS_PRESSURE];
+ wx = (data + i * ts->obj.tp_info_size)[WIDTH_X];
+ wy = (data + i * ts->obj.tp_info_size)[WIDTH_Y];
+
+ input_mt_slot(ts->input, i);
+ input_mt_report_slot_state(ts->input,
+ MT_TOOL_FINGER, f_state != 0);
+
+ if (!f_state)
+ continue;
+ x = get_unaligned_le16(&data[i * ts->obj.tp_info_size + POS_X]);
+ y = get_unaligned_le16(&data[i * ts->obj.tp_info_size + POS_Y]);
+
+ input_report_abs(ts->input, ABS_MT_POSITION_X, x);
+ input_report_abs(ts->input, ABS_MT_POSITION_Y, y);
+ input_report_abs(ts->input, ABS_MT_PRESSURE, pressure);
+ input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR,
+ max(wx, wy));
+ input_report_abs(ts->input, ABS_MT_TOUCH_MINOR,
+ min(wx, wy));
+ }
+
+ input_mt_sync_frame(ts->input);
+ input_sync(ts->input);
+}
+
+static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
+{
+ struct raydium_data *ts = _dev;
+
+ if (ts->boot_mode != RAYDIUM_TS_BLDR)
+ raydium_mt_event(ts);
+
+ return IRQ_HANDLED;
+}
+
+static ssize_t write_update_fw(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct raydium_data *ts = dev_get_drvdata(dev);
+ int error;
+
+ error = mutex_lock_interruptible(&ts->sysfs_mutex);
+ if (error)
+ return error;
+
+ error = raydium_i2c_fw_update(ts);
+ dev_dbg(dev, "firmware update result: %d\n", error);
+
+ mutex_unlock(&ts->sysfs_mutex);
+ return error ?: count;
+}
+
+static ssize_t raydium_bootmode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct raydium_data *ts = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", ts->boot_mode == RAYDIUM_TS_MAIN ?
+ "Normal" : "Recovery");
+}
+
+static ssize_t raydium_fw_ver_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct raydium_data *ts = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
+}
+
+static ssize_t raydium_hw_ver_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct raydium_data *ts = dev_get_drvdata(dev);
+
+ return sprintf(buf, "0x%04x\n", ts->info.hw_ver);
+}
+
+static DEVICE_ATTR(fw_version, S_IRUGO, raydium_fw_ver_show, NULL);
+static DEVICE_ATTR(hw_version, S_IRUGO, raydium_hw_ver_show, NULL);
+static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_bootmode_show, NULL);
+static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw);
+
+static struct attribute *raydium_attributes[] = {
+ &dev_attr_update_fw.attr,
+ &dev_attr_boot_mode.attr,
+ &dev_attr_fw_version.attr,
+ &dev_attr_hw_version.attr,
+ NULL
+};
+
+static struct attribute_group raydium_attribute_group = {
+ .attrs = raydium_attributes,
+};
+
+static void raydium_i2c_remove_sysfs_group(void *_data)
+{
+ struct raydium_data *ts = _data;
+
+ sysfs_remove_group(&ts->client->dev.kobj, &raydium_attribute_group);
+}
+
+static int raydium_i2c_power_on(struct raydium_data *ts)
+{
+ int error;
+
+ if (IS_ERR_OR_NULL(ts->reset_gpio))
+ return 0;
+
+ gpiod_set_value_cansleep(ts->reset_gpio, 1);
+
+ error = regulator_enable(ts->avdd);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "failed to enable avdd regulator: %d\n", error);
+ goto release_reset_gpio;
+ }
+
+ error = regulator_enable(ts->vccio);
+ if (error) {
+ regulator_disable(ts->avdd);
+ dev_err(&ts->client->dev,
+ "failed to enable vccio regulator: %d\n", error);
+ goto release_reset_gpio;
+ }
+
+ udelay(RAYDIUM_POWERON_DELAY_USEC);
+
+release_reset_gpio:
+ gpiod_set_value_cansleep(ts->reset_gpio, 0);
+
+ if (error)
+ return error;
+
+ msleep(RAYDIUM_RESET_DELAY_MSEC);
+
+ return 0;
+}
+
+static void raydium_i2c_power_off(void *_data)
+{
+ struct raydium_data *ts = _data;
+
+ if (!IS_ERR_OR_NULL(ts->reset_gpio)) {
+ gpiod_set_value_cansleep(ts->reset_gpio, 1);
+ regulator_disable(ts->vccio);
+ regulator_disable(ts->avdd);
+ }
+}
+
+static int raydium_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ union i2c_smbus_data dummy;
+ struct raydium_data *ts;
+ unsigned long irqflags;
+ int error;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev,
+ "%s: i2c check functionality error\n", DEVICE_NAME);
+ return -ENXIO;
+ }
+
+ ts = devm_kzalloc(&client->dev, sizeof(struct raydium_data),
+ GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ mutex_init(&ts->sysfs_mutex);
+ init_completion(&ts->cmd_done);
+
+ ts->client = client;
+ i2c_set_clientdata(client, ts);
+
+ ts->avdd = devm_regulator_get(&client->dev, "avdd");
+ if (IS_ERR(ts->avdd)) {
+ error = PTR_ERR(ts->avdd);
+ if (error != -EPROBE_DEFER)
+ dev_err(&client->dev,
+ "Failed to get 'avdd' regulator: %d\n", error);
+ return error;
+ }
+
+ ts->vccio = devm_regulator_get(&client->dev, "vccio");
+ if (IS_ERR(ts->vccio)) {
+ error = PTR_ERR(ts->vccio);
+ if (error != -EPROBE_DEFER)
+ dev_err(&client->dev,
+ "Failed to get 'vccio' regulator: %d\n", error);
+ return error;
+ }
+
+ ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ts->reset_gpio)) {
+ error = PTR_ERR(ts->reset_gpio);
+ if (error != -EPROBE_DEFER) {
+ dev_err(&client->dev,
+ "failed to get reset gpio: %d\n", error);
+ return error;
+ }
+ }
+
+ error = raydium_i2c_power_on(ts);
+ if (error)
+ return error;
+
+ error = devm_add_action(&client->dev, raydium_i2c_power_off, ts);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to install power off action: %d\n", error);
+ raydium_i2c_power_off(ts);
+ return error;
+ }
+
+ /* Make sure there is something at this address */
+ if (i2c_smbus_xfer(client->adapter, client->addr, 0,
+ I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
+ dev_err(&client->dev, "nothing at this address\n");
+ return -ENXIO;
+ }
+
+ error = raydium_i2c_initialize(ts);
+ if (error) {
+ dev_err(&client->dev, "failed to initialize: %d\n", error);
+ return error;
+ }
+
+ ts->input = devm_input_allocate_device(&client->dev);
+ if (!ts->input) {
+ dev_err(&client->dev, "Failed to allocate input device\n");
+ return -ENOMEM;
+ }
+
+ ts->input->name = "Raydium Touchscreen";
+ ts->input->id.bustype = BUS_I2C;
+
+ __set_bit(BTN_TOUCH, ts->input->keybit);
+ __set_bit(EV_ABS, ts->input->evbit);
+ __set_bit(EV_KEY, ts->input->evbit);
+
+ /* Multitouch input params setup */
+ input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0,
+ ts->info.x_max, 0, 0);
+ input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
+ 0, ts->info.y_max, 0, 0);
+ input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+ input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
+ input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
+ input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
+
+ input_mt_init_slots(ts->input, MAX_TOUCH_NUM, 0);
+
+ input_set_drvdata(ts->input, ts);
+
+ error = input_mt_init_slots(ts->input, MAX_TOUCH_NUM,
+ INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to initialize MT slots: %d\n", error);
+ return error;
+ }
+
+ error = input_register_device(ts->input);
+ if (error) {
+ dev_err(&client->dev,
+ "unable to register input device: %d\n", error);
+ return error;
+ }
+
+ error = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, raydium_i2c_irq, irqflags | IRQF_ONESHOT,
+ client->name, ts);
+ if (error) {
+ dev_err(&client->dev, "Failed to register interrupt\n");
+ return error;
+ }
+
+ device_init_wakeup(&client->dev, true);
+
+ error = sysfs_create_group(&client->dev.kobj, &raydium_attribute_group);
+ if (error) {
+ dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
+ error);
+ return error;
+ }
+
+ error = devm_add_action(&client->dev,
+ raydium_i2c_remove_sysfs_group, ts);
+ if (error) {
+ raydium_i2c_remove_sysfs_group(ts);
+ dev_err(&client->dev,
+ "Failed to add sysfs cleanup action: %d\n", error);
+ return error;
+ }
+
+ return 0;
+}
+
+static int raydium_i2c_remove(struct i2c_client *client)
+{
+ struct raydium_data *ts = i2c_get_clientdata(client);
+
+ input_unregister_device(ts->input);
+
+ device_init_wakeup(&client->dev, false);
+
+ mutex_destroy(&ts->sysfs_mutex);
+
+ return 0;
+}
+
+static void __maybe_unused raydium_enter_sleep(struct i2c_client *client)
+{
+ static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
+ int error;
+
+ error = raydium_i2c_send(client, CMD_ENTER_SLEEP, (u8 *)sleep_cmd,
+ sizeof(sleep_cmd));
+ if (error)
+ dev_err(&client->dev,
+ "Send sleep failed: %d\n", error);
+}
+
+static int __maybe_unused raydium_i2c_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct raydium_data *ts = i2c_get_clientdata(client);
+
+ /* Command not support in BLDR recovery mode */
+ if (ts->boot_mode != RAYDIUM_TS_MAIN)
+ return -EBUSY;
+
+ disable_irq(client->irq);
+
+ if (device_may_wakeup(dev)) {
+ raydium_enter_sleep(client);
+
+ ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);
+ } else {
+ raydium_i2c_power_off(ts);
+ }
+
+ return 0;
+}
+
+static int __maybe_unused raydium_i2c_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct raydium_data *ts = i2c_get_clientdata(client);
+
+ if (device_may_wakeup(dev)) {
+ if (ts->wake_irq_enabled)
+ disable_irq_wake(client->irq);
+ raydium_i2c_sw_reset(client);
+ } else {
+ raydium_i2c_power_on(ts);
+ raydium_i2c_initialize(ts);
+ }
+
+ enable_irq(client->irq);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
+ raydium_i2c_suspend, raydium_i2c_resume);
+
+static const struct i2c_device_id raydium_i2c_id[] = {
+ { DEVICE_NAME, 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id raydium_acpi_id[] = {
+ { "RAYD0001", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id raydium_of_match[] = {
+ { .compatible = "raydium,rm32380",},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, raydium_of_match);
+#endif
+
+static struct i2c_driver raydium_i2c_driver = {
+ .probe = raydium_i2c_probe,
+ .remove = raydium_i2c_remove,
+ .id_table = raydium_i2c_id,
+ .driver = {
+ .name = "raydium_ts",
+ .pm = &raydium_i2c_pm_ops,
+ .acpi_match_table = ACPI_PTR(raydium_acpi_id),
+ .of_match_table = of_match_ptr(raydium_of_match),
+ },
+};
+
+module_i2c_driver(raydium_i2c_driver);
+
+MODULE_AUTHOR("Raydium");
+MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
+MODULE_LICENSE("GPL v2");
--
2.1.2
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  Last update: 2016-03-25 07:01    [W:0.819 / U:0.312 seconds]
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