Raydium I2C touch driver.
Signed-off-by: jeffrey.lin <[email protected]>
---
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 http://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
Hi Jeffrey,
On Fri, Mar 25, 2016 at 01:21:09PM +0800, jeffrey.lin wrote:
> +#define MAX_PACKET_SIZE 60
...
> +#define RAYDIUM_FW_PAGESIZE 128
...
> +
> +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;
...
> +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;
> + }
Given the above definitions of MAX_PACKET_SIZE and
RAYDIUM_FW_PAGESIZE I do not believe that firmware update is working.
What is the biggest buffer that can be sent to the device? Maybe we
should allocate it dynamically?
I am also wondering about formatting command structure as byte sequence.
Would it be better to define it as:
struct raidium_cmd {
u32 bank;
int len;
u8 cmd[RAIDIUM_MAX_CMD_LEN];
}
What is the longest command that the controller supports?
(Do not resubmit the driver yet, let's discuss first).
Thanks.
--
Dmitry
Hi Dmitry:
Thank you for your response.
Actually, we didn't implement FW update function on the chromeos device, we just copy function from our previous android device. I'll fix that on the next version. Raydium controller doesn't have access bytes limit, but my previous android experimental device had 60 bytes limit.
About reformatting command structure, do you want me to reform all my commands as you said in the mail or just in case of fw update function? If not just in case of FW update, it's better to meet maximum buffer size, like "MAX_PACKET_SIZE".
Best Regards
----------------------------------------------------------------------
Jeffrey Lin,?L?q??
?繩????
Raydium Semiconductor Corporation
Tel:(03)666-1818 Ext.4163
Fax:(03)666-1919
-----Original Message-----
From: Dmitry Torokhov [mailto:[email protected]]
Sent: Monday, April 11, 2016 4:24 PM
To: jeffrey.lin
Cc: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; Jeffrey Lin (?L?q??); Roger Yang (????); KP Li (??????); Albert Shieh (?ªY); [email protected]; [email protected]; [email protected]
Subject: Re: [PATCH] driver: input :touchscreen : add Raydium I2C touch driver
Hi Jeffrey,
On Fri, Mar 25, 2016 at 01:21:09PM +0800, jeffrey.lin wrote:
> +#define MAX_PACKET_SIZE 60
...
> +#define RAYDIUM_FW_PAGESIZE 128
...
> +
> +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;
...
> +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;
> + }
Given the above definitions of MAX_PACKET_SIZE and RAYDIUM_FW_PAGESIZE I do not believe that firmware update is working.
What is the biggest buffer that can be sent to the device? Maybe we should allocate it dynamically?
I am also wondering about formatting command structure as byte sequence.
Would it be better to define it as:
struct raidium_cmd {
u32 bank;
int len;
u8 cmd[RAIDIUM_MAX_CMD_LEN];
}
What is the longest command that the controller supports?
(Do not resubmit the driver yet, let's discuss first).
Thanks.
--
Dmitry
Hi Dmitry:
Our new submission now is in progress. Do you have any further suggestions for my submission and when can I submit my new update?
Thank you.
Best Regards
----------------------------------------------------------------------
Jeffrey Lin,?L?q??
?繩????
Raydium Semiconductor Corporation
Tel:(03)666-1818 Ext.4163
Fax:(03)666-1919
-----Original Message-----
From: Jeffrey Lin (?L?q??)
Sent: Monday, April 11, 2016 5:57 PM
To: 'Dmitry Torokhov'; jeffrey.lin
Cc: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; Roger Yang (????); KP Li (??????); Albert Shieh (?ªY); [email protected]; [email protected]; [email protected]
Subject: RE: [PATCH] driver: input :touchscreen : add Raydium I2C touch driver
Hi Dmitry:
Thank you for your response.
Actually, we didn't implement FW update function on the chromeos device, we just copy function from our previous android device. I'll fix that on the next version. Raydium controller doesn't have access bytes limit, but my previous android experimental device had 60 bytes limit.
About reformatting command structure, do you want me to reform all my commands as you said in the mail or just in case of fw update function? If not just in case of FW update, it's better to meet maximum buffer size, like "MAX_PACKET_SIZE".
Best Regards
----------------------------------------------------------------------
Jeffrey Lin,?L?q??
?繩????
Raydium Semiconductor Corporation
Tel:(03)666-1818 Ext.4163
Fax:(03)666-1919
-----Original Message-----
From: Dmitry Torokhov [mailto:[email protected]]
Sent: Monday, April 11, 2016 4:24 PM
To: jeffrey.lin
Cc: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; Jeffrey Lin (?L?q??); Roger Yang (????); KP Li (??????); Albert Shieh (?ªY); [email protected]; [email protected]; [email protected]
Subject: Re: [PATCH] driver: input :touchscreen : add Raydium I2C touch driver
Hi Jeffrey,
On Fri, Mar 25, 2016 at 01:21:09PM +0800, jeffrey.lin wrote:
> +#define MAX_PACKET_SIZE 60
...
> +#define RAYDIUM_FW_PAGESIZE 128
...
> +
> +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;
...
> +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;
> + }
Given the above definitions of MAX_PACKET_SIZE and RAYDIUM_FW_PAGESIZE I do not believe that firmware update is working.
What is the biggest buffer that can be sent to the device? Maybe we should allocate it dynamically?
I am also wondering about formatting command structure as byte sequence.
Would it be better to define it as:
struct raidium_cmd {
u32 bank;
int len;
u8 cmd[RAIDIUM_MAX_CMD_LEN];
}
What is the longest command that the controller supports?
(Do not resubmit the driver yet, let's discuss first).
Thanks.
--
Dmitry