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Date: Wed, 24 Oct 2012 10:11:04 +0800
From: Scott Liu <scott.liu@....com.tw>
To: Scott Liu <scott.liu@....com.tw>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
linux-input@...r.kernel.org, linux-i2c@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Benjamin Tissoires <benjamin.tissoires@...il.com>,
Jesse <jesse@....com.tw>, Vincent Wang <vincent.wang@....com.tw>,
Paul <paul.liang@....com.tw>
Subject: [PATCH v2] upport Elan Touchscreen eKTF product.
Hi Dmitry:
Sorry, please ignore my previous patch.
This patch is for Elan eKTF Touchscreen product, I2C adpater module.
Signed-off-by: Scott Liu <scott.liu@....com.tw>
---
Hi,
v2 revision I have fixed some bug as your advise.
1. To target the mainline
2. No Android dependency
3. reuse those duplication code from Henrik's patchset.
(input_mt_sync_frame() / input_mt_get_slot_by_key())
4. some typo and etc...
drivers/input/touchscreen/Kconfig | 9 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/elants_i2c.c | 2533 ++++++++++++++++++++++++++++++++
include/linux/i2c/elants.h | 56 +
4 files changed, 2599 insertions(+)
create mode 100644 drivers/input/touchscreen/elants_i2c.c
create mode 100644 include/linux/i2c/elants.h
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 1ba232c..50e6f05 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -237,6 +237,15 @@ config TOUCHSCREEN_EETI
To compile this driver as a module, choose M here: the
module will be called eeti_ts.
+config TOUCHSCREEN_ELAN
+ tristate "Elan touchscreen panel support"
+ depends on I2C
+ help
+ Say Y here to enable support for I2C connected Elan touch panels.
+
+ To compile this driver as a module, choose M here: the
+ module will be called elants_i2c.
+
config TOUCHSCREEN_EGALAX
tristate "EETI eGalax multi-touch panel support"
depends on I2C
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 178eb12..428a631 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_TOUCHSCREEN_EDT_FT5X06) += edt-ft5x06.o
obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o
obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o
obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o
+obj-$(CONFIG_TOUCHSCREEN_ELAN) += elants_i2c.o
obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o
obj-$(CONFIG_TOUCHSCREEN_EGALAX) += egalax_ts.o
obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
new file mode 100644
index 0000000..47546be
--- /dev/null
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -0,0 +1,2533 @@
+/*
+ * Elan Microelectronics touchpanels with I2C interface
+ *
+ * Copyright (C) 2012 Elan Microelectronics Corporation.
+ * Scott Liu <scott.liu@....com.tw>
+ *
+ * This code is partly based on hid-multitouch.c:
+ *
+ * Copyright (c) 2010-2012 Stephane Chatty <chatty@...c.fr>
+ * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@...il.com>
+ * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
+ *
+ */
+
+/*
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/jiffies.h>
+#include <linux/hrtimer.h>
+#include <linux/timer.h>
+#include <linux/kthread.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/buffer_head.h>
+#include <linux/version.h>
+#include <linux/kfifo.h>
+#include <linux/slab.h>
+#include <linux/input/mt.h>
+#include <linux/i2c/elants.h>
+
+
+/* debug option */
+static bool debug = false;
+module_param(debug, bool, 0444);
+MODULE_PARM_DESC(debug, "print a lot of debug information");
+
+#define elan_dbg(client, fmt, arg...) \
+ if (debug) \
+ dev_printk(KERN_DEBUG, &client->dev, fmt, ##arg)
+
+/*=================================================
+ * Marco
+ *================================================= */
+#define DRV_NAME "elants_i2c"
+
+#define DRV_MA_VER 2
+#define DRV_MI_VER 0
+#define DRV_SUB_MI_VER 0
+
+#define _str(s) #s
+#define str(s) _str(s)
+#define DRIVER_VERSION str(DRV_MA_VER.DRV_MI_VER.DRV_SUB_MI_VER)
+
+#define IDX_PACKET_SIZE_WIDTH 40
+
+#define MAX_CONTACT_NUM 10
+
+/* FW Power Saving Mode */
+#define PWR_STATE_DEEP_SLEEP 0
+#define PWR_STATE_NORMAL 1
+#define PWR_STATE_MASK BIT(3)
+
+/* kfifo buffer size, used for Read command handshake */
+#define FIFO_SIZE (64)
+
+/*! Convert from rows or columns into resolution */
+#define ELAN_TS_RESOLUTION(n) ((n - 1) * 64)
+
+static const char hello_packet[4] = { 0x55, 0x55, 0x55, 0x55 };
+static const char iniap_packet[4] = { 0x55, 0xaa, 0x33, 0xcc };
+static const char recov_packet[4] = { 0x55, 0x55, 0x80, 0x80 };
+
+
+/*! driver status flag, should move to public header file */
+#define STA_NONINIT 0x00000001
+#define STA_INIT 0x00000002
+#define STA_INIT2 0x00000004
+#define STA_INIT3 0x00000100
+#define STA_INIT4 0x00000200
+#define STA_PROBED 0x00000008
+#define STA_ERR_HELLO_PKT 0x00000010
+#define STA_USE_IRQ 0x00000020
+#define STA_SLEEP_MODE 0x00000040
+
+/*=======================================
+ * Structure Definition
+ *=======================================*/
+
+/*! @enum elan i2c address definition */
+enum elan_i2c_addr {
+ elan_i2c_master = 0x10,
+ elan_i2c_slave1 = 0x20,
+ elan_i2c_slave2 = 0x21,
+
+ elan_i2c_maxnum = 3,
+};
+
+/*! @enum finger_report_header Finger report header byte definition */
+enum finger_report_header {
+ idx_coordinate_packet_4_finger = 0x5c,
+ idx_coordinate_packet_10_finger = 0x62,
+};
+
+/*! @enum fw_queue_report_hdr FW Queue report header definition */
+enum fw_queue_report_hdr {
+ queue_header_byte_Single = 0x62,
+ queue_header_byte_normal = 0x63,
+ queue_header_byte_wait = 0x64,
+ cmd_header_byte_rek = 0x66,
+ queue_header_size = 4,
+ queue_packet_max_len = queue_header_size + (IDX_PACKET_SIZE_WIDTH * 3),
+};
+
+/*! @enum fw_normal_cmd_hdr FW Normal command header definition */
+enum fw_normal_cmd_hdr {
+ cmd_header_byte_write = 0x54,
+ cmd_header_byte_read = 0x53,
+ cmd_header_byte_response = 0x52,
+ cmd_header_byte_hello = 0x55,
+ cmd_response_len = 4
+};
+
+/*! @enum fw_info_pos FW information position */
+enum fw_info_pos {
+ idx_finger_header = 0,
+ idx_finger_state = 1,
+ idx_finger_total = 2,
+ idx_finger_checksum = 34,
+ idx_finger_width = 35,
+ idx_4finger_checksum = 17,
+ idx_finger_width_checksum = 34,
+};
+
+/*! @enum lock_bit Lock bit definition */
+enum lock_bit {
+ idx_file_operate = 0,
+ idx_cmd_handshake = 1,
+ idx_finger_report = 2,
+ idx_update_fw = 3,
+};
+
+enum kfifo_ret {
+ ret_ok = 0,
+ ret_cmdrsp = 1,
+ ret_fail = -1,
+};
+
+typedef enum elan_boot_e {
+ E_BOOT_NORM = 0,
+ E_BOOT_IAP = 1
+} elan_boot_t;
+
+
+/*! @struct <multi_queue_header> */
+struct multi_queue_header {
+ u8 packet_id;
+ u8 report_count;
+ u8 report_length;
+ u8 reserved;
+};
+
+/*! @brief elan_polling */
+struct elan_polling {
+ struct workqueue_struct *elan_wq; /* polling work queue */
+ struct timer_list timer; /* Polling intr_gpio timer */
+ u8 int_status; /* polling intr gpio status */
+};
+
+/* finger handler, refer to hid-multitouch.c */
+struct mt_slot {
+ __s32 x, y, p, w, h;
+ __s32 contactid; /* the device ContactID assigned to this slot */
+ bool touch_state; /* is the touch valid? */
+ bool seen_in_this_frame;/* has this slot been updated */
+};
+
+struct mt_device {
+ struct mt_slot curdata; /* placeholder of incoming data */
+ __u8 num_received; /* how many contacts we received */
+ __u8 num_expected; /* expected last contact index */
+ __u8 maxcontacts;
+ bool curvalid; /* is the current contact valid? */
+ unsigned mt_flags; /* flags to pass to input-mt */
+ struct mt_slot *slots;
+};
+
+
+/**
+*
+* @brief elants_data
+*
+* all variable should include in this struct.
+*
+*/
+struct elants_data {
+ int intr_gpio; /* interupter pin*/
+ int rst_gpio; /* reset pin*/
+ int use_irq;
+ u8 major_fw_version;
+ u8 minor_fw_version;
+ u8 major_bc_version;
+ u8 minor_bc_version;
+ u8 major_hw_id;
+ u8 minor_hw_id;
+ bool fw_enabled; /* True if firmware device enabled*/
+ int rows; /* Panel geometry for input layer*/
+ int cols;
+ int x_max;
+ int y_max;
+ /* Power state 0:sleep 1:active*/
+ u8 power_state;
+ /* TS is in IAP mode already*/
+#define IAP_MODE_ENABLE 1
+ /* 1 : Firmware update mode
+ 0 : normal*/
+ unsigned int iap_mode;
+ unsigned int rx_size; /* Read size in use*/
+
+ /* Multi-queue info */
+ struct multi_queue_header mq_header;
+
+ /* our i2c client*/
+ struct i2c_client *client;
+ /* input device*/
+ struct input_dev *input;
+ /* normal function work queue*/
+ struct work_struct work;
+ /* start probe start*/
+ struct task_struct *thread;
+ /* char device for ioctl and IAP*/
+ struct miscdevice firmware;
+ /* regular polling work thread*/
+ struct work_struct pollingwork;
+ /* regular polling work queue*/
+ struct elan_polling polling;
+
+ /* Protects I2C accesses to device*/
+ struct mutex mutex;
+ /* Protects I2C tx/rx*/
+ struct mutex tr_mutex;
+
+ /* device flags */
+ unsigned long flags;
+
+ /* elan-iap i2c address*/
+ unsigned short i2caddr;
+
+ /* fifo and processing */
+ struct kfifo fifo;
+
+ /* Serialize operations around FIFO */
+ struct mutex fifo_mutex;
+ wait_queue_head_t wait;
+ spinlock_t rx_kfifo_lock;
+
+ /* boot log */
+ u8 boot_log[256];
+
+ /*! Add for TS driver debug */
+ unsigned int status;
+ long int irq_received;
+ long int packet_received;
+ long int packet_fail;
+ long int touched_sync;
+ long int no_touched_sync;
+ long int checksum_correct;
+ long int wdt_reset;
+ u16 checksum_fail;
+ u16 header_fail;
+ u16 mq_header_fail;
+ u16 drop_frame;
+
+ /* mt device */
+ struct mt_device td;
+};
+
+
+
+/*/============================================
+ * Function prototype
+ *=============================================*/
+
+static void
+elants_drop_packet(struct elants_data *ts);
+static int
+elan_hw_reset(struct i2c_client *client);
+static int
+elan_touch_pull_frame(struct elants_data *ts,
+ u8 *buf);
+
+/*=================================================
+ * Global variable
+ *=================================================*/
+
+/*! for elan-iap char driver */
+static struct miscdevice *private_ts;
+
+#define elants_acqurie_data(a, cmd, buf, c) \
+ elants_async_recv_data(a, cmd, buf, c, c)
+
+/*=================================================
+ * Function implement
+ *=================================================*/
+static inline void elan_msleep(u32 t)
+{
+ /*
+ * If the sleeping time is 10us - 20ms, usleep_range() is recommended.
+ * Read Documentation/timers/timers-howto.txt
+ */
+ usleep_range(t*1000, t*1000 + 500);
+}
+
+/**
+ * @brief elan_ts_poll - polling intr pin status.
+ * @param client : our i2c device
+ *
+ * @retval 0 means intr pin is low, \n
+ * otherwise is high.
+ *
+ * polling intr pin untill low and the maximus wait time is \b 200ms.
+ */
+static int elan_ts_poll(struct i2c_client *client)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ int status = 0, retry = 20;
+
+ do {
+ status = gpio_get_value(ts->intr_gpio);
+ elan_dbg(client,
+ "%s: status = %d\n", __func__, status);
+ retry--;
+ mdelay(10);
+ } while (status != 0 && retry > 0);
+
+ elan_dbg(client,
+ "%s: poll interrupt status %s\n",
+ __func__, status == 1 ? "high" : "low");
+ return (status == 0 ? 0 : -ETIMEDOUT);
+}
+
+
+/**
+ * @brief \b elants_async_recv_data - get TP status
+ * @param client : our i2c device
+ * @param cmd : asking command
+ * @param buf : result
+ * @param size : command length usually.
+ *
+ * set command type and TP will return its status in buf.
+ */
+static int elants_async_recv_data(
+ struct i2c_client *client,
+ const uint8_t *cmd,
+ uint8_t *buf, size_t tx_size,
+ size_t rx_size)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ dev_dbg(&client->dev,
+ "[ELAN] Enter: %s\n", __func__);
+
+ if (buf == NULL)
+ return -EINVAL;
+
+ mutex_lock(&ts->tr_mutex);
+ if ((i2c_master_send(client, cmd, tx_size)) != tx_size) {
+ dev_err(&client->dev,
+ "%s: i2c_master_send failed\n", __func__);
+ goto fail;
+ }
+
+ if (unlikely(elan_ts_poll(client) < 0))
+ goto fail;
+ else {
+ if (i2c_master_recv(client, buf, rx_size) != rx_size)
+ goto fail;
+ mutex_unlock(&ts->tr_mutex);
+ }
+
+ return 0;
+
+fail:
+ mutex_unlock(&ts->tr_mutex);
+ return -EINVAL;
+}
+
+
+/**
+ * @brief \b elan_ts_set_data - set command to TP.
+ * @param client : our i2c device
+ * @param data : command or data which will send to TP.
+ * @param len : command length usually.
+ *
+ * set command to our TP.
+ */
+static int elants_set_data(struct i2c_client *client,
+ const u8 *data, size_t len)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ struct i2c_adapter *adap = client->adapter;
+ struct i2c_msg msg;
+ int rc = 0;
+
+ dev_dbg(&client->dev, "[ELAN] Enter: %s\n", __func__);
+ elan_dbg(client,
+ "dump cmd: %02x, %02x, %02x, %02x, addr=%x\n",
+ data[0], data[1], data[2], data[3], ts->i2caddr);
+
+ mutex_lock(&ts->tr_mutex);
+
+ msg.addr = ts->i2caddr;
+ msg.flags = ts->client->flags & I2C_M_TEN;
+ msg.len = len;
+ msg.buf = (char *)data;
+
+ rc = i2c_transfer(adap, &msg, 1);
+ if (rc != 1)
+ dev_err(&ts->client->dev,
+ "[ELAN] i2c_transfer write fail, rc=%d\n", rc);
+
+ mutex_unlock(&ts->tr_mutex);
+
+ /* If everything went ok (i.e. 1 msg transmitted), return #bytes
+ transmitted, else error code. */
+ return (rc == 1) ? len : rc;
+
+}
+
+/**
+ * @brief \b elan_ts_get_data - set command to TP.
+ * @param client : our i2c device
+ * @param data : data to be received from TP.
+ * @param len : command length usually.
+ *
+ * get data from our TP.
+ */
+static int elants_get_data(
+ struct i2c_client *client,
+ const u8 *buf,
+ size_t len)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ struct i2c_adapter *adap = client->adapter;
+ struct i2c_msg msg;
+ int rc = 0;
+
+ dev_dbg(&client->dev,
+ "[ELAN] Enter: %s id:0x%x\n", __func__, ts->i2caddr);
+
+ mutex_lock(&ts->tr_mutex);
+
+ msg.addr = ts->i2caddr;
+ msg.flags = client->flags & I2C_M_TEN;
+ msg.flags |= I2C_M_RD;
+ msg.len = len;
+ msg.buf = (char *)buf;
+
+ rc = i2c_transfer(adap, &msg, 1);
+ if (rc != 1)
+ dev_err(&client->dev,
+ "[ELAN] i2c_transfer read fail, rc=%d\n", rc);
+
+ mutex_unlock(&ts->tr_mutex);
+
+ /* If everything went ok (i.e. 1 msg transmitted), return #bytes
+ transmitted, else error code. */
+ return (rc == 1) ? len : rc;
+}
+
+
+static int elants_cmd_transfer_once(
+ struct i2c_client *client,
+ const u8 *sbuf, const u8 slen,
+ u8 *rbuf, u8 rlen)
+{
+ int ret = 0;
+ struct elants_data *ts =
+ i2c_get_clientdata(client);
+
+ mutex_lock(&ts->mutex);
+ set_bit(idx_cmd_handshake, &ts->flags);
+ elants_set_data(client, sbuf, slen);
+ mutex_unlock(&ts->mutex);
+
+ if (sbuf[0] == cmd_header_byte_read) {
+ /* We will wait for non O_NONBLOCK handles until a signal or data */
+ mutex_lock(&ts->fifo_mutex);
+
+ while (kfifo_len(&ts->fifo) == 0) {
+ mutex_unlock(&ts->fifo_mutex);
+ ret = wait_event_interruptible_timeout(
+ ts->wait, kfifo_len(&ts->fifo),
+ msecs_to_jiffies(3000));
+ if (ret <= 0) {
+ ret = -ETIMEDOUT;
+ dev_err(&client->dev,
+ "timeout!! wake_up(ts->wait)\n");
+ goto err2;
+ }
+ mutex_lock(&ts->fifo_mutex);
+ }
+ if (elan_touch_pull_frame(ts, rbuf) < 0) {
+ ret = -1;
+ goto err1;
+ }
+
+ pr_info("[ELAN] Get Data [%.2x:%.2x:%.2x:%.2x]\n",
+ rbuf[0], rbuf[1], rbuf[2], rbuf[3]);
+err1:
+ mutex_unlock(&ts->fifo_mutex);
+err2:
+ clear_bit(idx_cmd_handshake, &ts->flags);
+ }
+
+ return (ret > 0) ? 1 : ret;
+}
+
+/**
+ * @brief interfaces
+ * provide the hardware and firmware information
+ */
+static ssize_t show_fw_version_value(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return -1;
+
+ return sprintf(buf, "%.2x %.2x\n",
+ ts->major_fw_version,
+ ts->minor_fw_version);
+}
+
+
+static ssize_t show_bc_version_value(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ return sprintf(buf, "%.2x %.2x\n",
+ ts->major_bc_version,
+ ts->minor_bc_version);
+}
+
+static ssize_t show_drvver_value(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s\n", DRIVER_VERSION);
+}
+
+
+static ssize_t show_intr_gpio(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret = 0;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return -1;
+
+ ret = gpio_get_value(ts->intr_gpio);
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t show_adapter_pkt_rvd(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return -1;
+
+ return sprintf(buf, "irq_received=%ld packet_received=%ld " \
+ "packet_fail=%ld mq_hdr_fail=%d, " \
+ "checksum_fail=%x header_fail=%d, " \
+ "poll_timer=%d, wdt_reset=%ld\n",
+ ts->irq_received, ts->packet_received,
+ ts->packet_fail, ts->mq_header_fail,
+ ts->checksum_fail, ts->header_fail,
+ ts->drop_frame, ts->wdt_reset);
+}
+
+static ssize_t show_queue_count(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return -1;
+
+ return sprintf(buf, "queue_report_count=%d, report_length=%d\n",
+ ts->mq_header.report_count,
+ ts->mq_header.report_length);
+}
+
+
+static ssize_t store_power_mode(
+ struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret = 0;
+ unsigned long val;
+ const char AcMode[] = {0x54, 0x30, 0x00, 0x01};
+ const char BtMode[] = {0x54, 0x38, 0x00, 0x01};
+ char cmd[4];
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return -1;
+
+ ret = kstrtoul(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ switch (val) {
+ case 0:
+ memcpy(cmd, AcMode, sizeof(AcMode));
+ break;
+ case 1:
+ memcpy(cmd, BtMode, sizeof(BtMode));
+ break;
+ default:
+ return -1;
+ }
+
+ mutex_lock(&ts->mutex);
+ elants_set_data(ts->client, cmd, sizeof(cmd));
+ mutex_unlock(&ts->mutex);
+
+ return count;
+}
+
+static ssize_t show_power_mode(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const char RespCmd[] = {0x53, 0x30, 0x00, 0x01};
+ char tbuf[4];
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return -1;
+
+
+ mutex_lock(&ts->mutex);
+ set_bit(idx_cmd_handshake, &ts->flags);
+ elants_acqurie_data(ts->client, RespCmd, tbuf, sizeof(RespCmd));
+ if (tbuf[0] != cmd_header_byte_response) {
+ dev_err(&client->dev,
+ "exception!! %x:%x:%x:%x\n",
+ tbuf[0], tbuf[1], tbuf[2], tbuf[3]);
+ elants_drop_packet(ts);
+ memset(tbuf, 0x0, sizeof(tbuf));
+ }
+ clear_bit(idx_cmd_handshake, &ts->flags);
+ mutex_unlock(&ts->mutex);
+
+ return sprintf(buf, "%x:%x:%x:%x\n",
+ tbuf[0], tbuf[1], tbuf[2], tbuf[3]);
+}
+
+static ssize_t show_report_rate(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+ long int old_frame, new_frame;
+
+ old_frame = ts->packet_received;
+ ssleep(1);
+ new_frame = ts->packet_received;
+
+ return sprintf(buf, "%ld\n", new_frame - old_frame);
+}
+
+static ssize_t show_iap_mode(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ return sprintf(buf, "%s\n",
+ (ts->iap_mode == 0) ? "Normal" : "Recovery");
+}
+
+static ssize_t show_recal(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+ u8 sbuf[4], retstr[32] = "re-K finish";
+
+ u8 w_flashkey[4] = {0x54, 0xC0, 0xE1, 0x5A};
+ u8 rek[4] = {0x54, 0x29, 0x00, 0x01};
+
+ ts->i2caddr = elan_i2c_master;
+ elants_set_data(client, w_flashkey, 4);
+ elan_msleep(1);
+ elants_set_data(client, rek, 4);
+
+ while (gpio_get_value(ts->intr_gpio) == 0) {
+ if (elants_get_data(client, sbuf, 4) != 4)
+ sprintf(retstr, "re-K Fail");
+ pr_info("[ELAN] buf=%x:%x:%x:%x\n", buf[0],
+ sbuf[1], sbuf[2], sbuf[3]);
+ }
+
+ return sprintf(buf, "%s\n", retstr);
+}
+
+
+static ssize_t show_boot_log(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ /* show boot status, allow user cat this log during iap mode enable!! */
+
+ return scnprintf(buf, PAGE_SIZE, ts->boot_log);
+}
+
+static ssize_t store_set_mode(
+ struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned int cmds[32];
+ u8 recv_buf[32];
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return -1;
+
+ /* get input */
+ sscanf(buf, "%x %x %x %x", &cmds[0], &cmds[1], &cmds[2], &cmds[3]);
+
+ if (cmds[0] != cmd_header_byte_read &&
+ cmds[0] != cmd_header_byte_write)
+ return -EFAULT;
+
+ pr_info("[ELAN] Command %.2x:%.2x:%.2x:%.2x\n",
+ cmds[0], cmds[1], cmds[2], cmds[3]);
+
+ ret = elants_cmd_transfer_once(client,
+ (const u8 *)cmds, 4, recv_buf, 4);
+
+ return (ret > 0) ? count : -1;
+}
+
+
+
+static DEVICE_ATTR(cmd_mode, S_IWUGO, NULL, store_set_mode);
+static DEVICE_ATTR(power_mode, S_IRUGO|S_IWUGO,
+ show_power_mode, store_power_mode);
+static DEVICE_ATTR(queue_count, S_IRUGO, show_queue_count, NULL);
+static DEVICE_ATTR(drv_version, S_IRUGO, show_drvver_value, NULL);
+static DEVICE_ATTR(fw_version, S_IRUGO, show_fw_version_value, NULL);
+static DEVICE_ATTR(bc_version, S_IRUGO, show_bc_version_value, NULL);
+static DEVICE_ATTR(ts_packet, S_IRUGO, show_adapter_pkt_rvd, NULL);
+static DEVICE_ATTR(gpio, S_IRUGO, show_intr_gpio, NULL);
+static DEVICE_ATTR(report_rate, S_IRUGO, show_report_rate, NULL);
+static DEVICE_ATTR(boot_log, S_IRUGO, show_boot_log, NULL);
+static DEVICE_ATTR(iap_mode, S_IRUGO, show_iap_mode, NULL);
+static DEVICE_ATTR(rek, S_IRUGO, show_recal, NULL);
+
+
+
+static struct attribute *elan_attributes[] = {
+ &dev_attr_cmd_mode.attr,
+ &dev_attr_power_mode.attr,
+ &dev_attr_queue_count.attr,
+ &dev_attr_fw_version.attr,
+ &dev_attr_drv_version.attr,
+ &dev_attr_bc_version.attr,
+ &dev_attr_gpio.attr,
+ &dev_attr_ts_packet.attr,
+ &dev_attr_report_rate.attr,
+ &dev_attr_boot_log.attr,
+ &dev_attr_iap_mode.attr,
+ &dev_attr_rek.attr,
+
+ NULL
+};
+
+
+static struct attribute_group elan_attribute_group = {
+ .name = "elants",
+ .attrs = elan_attributes,
+};
+
+
+/**
+ * @brief elan_hw_reset - h/w reset.
+ * @param client : our i2c device
+ *
+ * @retval >0 means reset success, \n
+ * otherwise is fail.
+ *
+ */
+static int elan_hw_reset(struct i2c_client *client)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ int ret;
+
+ if (ts->rst_gpio < 0)
+ return -1;
+
+ ret = gpio_direction_output(ts->rst_gpio, 0);
+ if (ret < 0) {
+ pr_err("gpio_direction fail!\n");
+ return ret;
+ }
+
+ elan_msleep(2);
+
+ ret = gpio_direction_output(ts->rst_gpio, 1);
+ if (ret < 0)
+ return ret;
+
+ /* wait > 10ms to ensure that fw is in IAP mode */
+ msleep(20);
+
+ return ret;
+}
+
+
+/**
+ * @brief \b elants_is_iap - is it in iap mode ?
+ * @param client : our i2c device
+ * @param addr : i2c address
+ *
+ * check whether fw currently is in iap.
+ * @return :
+ * < 0 :normal mode
+ * > 0 :iap mode or abnormal.
+ * -EINVAL : addr overflow, no such device
+ */
+static int elants_is_iap(
+ struct i2c_client *client,
+ u16 addr)
+{
+ int rc;
+ uint8_t buf_recv[4] = {0};
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ ts->i2caddr = addr;
+ rc = elants_get_data(client, buf_recv, 4);
+ if (unlikely(rc < 0)) {
+ dev_err(&client->dev,
+ "[ELAN] %s: ID 0x%.2x retval=%d!\n",
+ __func__, addr, rc);
+ rc = -ENODEV;
+ } else {
+ if (memcmp(buf_recv, iniap_packet, 4)) {
+ dev_err(&client->dev,
+ "[ELAN] %s: ID 0x%x retval=%d !\n",
+ __func__, addr, rc);
+ rc = -ENODEV;
+ }
+ }
+
+ ts->i2caddr = elan_i2c_master;
+
+ return rc;
+}
+
+static int elants_boot(
+ struct i2c_client *client,
+ u16 addr,
+ elan_boot_t type)
+{
+ int rc;
+ struct elants_data *ts = i2c_get_clientdata(client);
+ uint8_t command[2][4] = {
+ {0x4D, 0x61, 0x69, 0x6E}, /* normal_command */
+ {0x45, 0x49, 0x41, 0x50}, /* iap_command */
+ };
+
+ ts->i2caddr = addr;
+ rc = elants_set_data(client, command[(int32_t)type], 4);
+ if (rc != 4) {
+ if (type == E_BOOT_IAP)
+ dev_err(&client->dev,
+ "[elan] Boot IAP fail, error=%d\n",
+ rc);
+ else
+ dev_dbg(&client->dev,
+ "[elan] Boot normal fail, error=%d\n",
+ rc);
+ ts->i2caddr = elan_i2c_master;
+ return -EINVAL;
+ }
+ pr_info("[elan] Boot success -- 0x%x\n", addr);
+ ts->i2caddr = elan_i2c_master;
+ return 0;
+}
+
+static int elants_enter_iap(struct i2c_client *client)
+{
+ int rc = 0;
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ elan_hw_reset(client);
+
+ /* Boot devices to IAP mode */
+ rc = elants_boot(client, elan_i2c_master, E_BOOT_IAP);
+ if (rc < 0)
+ return rc;
+
+ elan_msleep(10);
+
+ /* Check if devices can enter IAP mode */
+ rc = elants_is_iap(client, elan_i2c_master);
+ if (rc < 0)
+ return rc;
+
+ ts->iap_mode = IAP_MODE_ENABLE;
+ set_bit(idx_update_fw, &ts->flags);
+ ts->i2caddr = elan_i2c_master;
+
+ return rc;
+}
+
+
+
+/**
+ * @brief __hello_packet_handler - hadle hello packet.
+ * @param client : our i2c device
+ *
+ * @return { >0 means success,
+ * otherwise fail. }
+ *
+ * Normal hello packet is {0x55, 0x55, 0x55, 0x55}
+ * recovery mode hello packet is {0x55, 0x55, 0x80, 0x80}
+ */
+static int __hello_packet_handler(struct i2c_client *client)
+{
+ int rc = 0, tries = 5;
+ uint8_t buf_recv[4] = {0};
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+
+retry: /* wait INT for 1sec */
+ rc = elan_ts_poll(client);
+ if (rc < 0) {
+ dev_err(&client->dev,
+ "%s: poll failed!\n", ELAN_DEV_NAME);
+ if (tries-- > 0)
+ goto retry;
+ }
+
+ rc = elants_get_data(client, buf_recv, 4);
+
+ /* Print buf_recv anyway */
+ pr_info("[ELAN] rc = %d Hello Packet: " \
+ "[0x%.2x 0x%.2x 0x%.2x 0x%.2x]\n",
+ rc, buf_recv[0], buf_recv[1], buf_recv[2], buf_recv[3]);
+
+ if (rc != 4) {
+ dev_err(&client->dev,
+ "[ELAN] %s: Try recovery because of no hello\n",
+ __func__);
+
+ /* force TP FW into IAP mode. */
+ elants_enter_iap(client);
+ return -EINVAL;
+ }
+
+ /* v0.85 IAP recovery mechanism 2012-1022*/
+ if (memcmp(buf_recv, hello_packet, 4)) {
+ /* Check if got 55558080 and
+ * should receive next 4Byte for BC version
+ */
+ if (!memcmp(buf_recv, recov_packet, 4)) {
+ pr_warn("[ELAN] got IAP recovery packet!(55558080)\n");
+ rc = elants_get_data(client, buf_recv, 4);
+ if (unlikely(rc != 4)) {
+ dev_err(&client->dev,
+ "Got IAP recovery packet fail!\n");
+ return -ENODEV;
+ }
+
+ /* buf_recv[0,1] is dummy data */
+ ts->major_bc_version = buf_recv[3];
+ ts->minor_bc_version = buf_recv[2];
+
+ pr_info("[ELAN] BC version = %.2x:%.2x",
+ ts->major_bc_version,
+ ts->minor_bc_version);
+ }
+
+ pr_info("[ELAN] got mainflow recovery message\n");
+ rc = elants_enter_iap(client);
+ if (rc < 0)
+ dev_err(&client->dev, "Enter IAP mode fail!\n");
+ return -ENODEV;
+ }
+
+ ts->i2caddr = elan_i2c_master;
+
+ return rc;
+}
+
+static int __fw_packet_handler(struct i2c_client *client)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ int rc, tries = 3;
+ const uint8_t cmd[] = {cmd_header_byte_read, 0x00, 0x00, 0x01};
+ uint8_t buf_recv[4] = {0x0};
+
+ /* Command not support in IAP recovery mode */
+ if (test_bit(idx_update_fw, &ts->flags))
+ return 0;
+retry:
+ rc = elants_acqurie_data(client, cmd, buf_recv, 4);
+ if (rc < 0)
+ return rc;
+
+ if (buf_recv[0] == cmd_header_byte_response) {
+ ts->major_fw_version = ((buf_recv[1] & 0x0f) << 4) |
+ ((buf_recv[2] & 0xf0) >> 4);
+ ts->minor_fw_version = ((buf_recv[2] & 0x0f) << 4) |
+ ((buf_recv[3] & 0xf0) >> 4);
+
+ if ((ts->major_fw_version == 0x00 &&
+ ts->minor_fw_version == 0x00) ||
+ (ts->major_fw_version == 0xFF &&
+ ts->minor_fw_version == 0xFF)) {
+ dev_err(&client->dev,
+ "\n\n[ELAN] FW version is empty, "
+ "suggest IAP ELAN chip\n\n");
+ return -EINVAL;
+ }
+
+ elan_dbg(client,
+ "[ELAN] TOUCH MAJOR FW VERSION 0x%02x\n",
+ ts->major_fw_version);
+ elan_dbg(client,
+ "[ELAN] TOUCH MINOR FW VERSION 0x%02x\n",
+ ts->minor_fw_version);
+ } else {
+ if (tries > 0) {
+ tries--;
+ goto retry;
+ }
+ ts->major_fw_version = 0xff;
+ ts->minor_fw_version = 0xff;
+ dev_err(&client->dev,
+ "\n\n[ELAN] FW version is empty, "
+ "suggest IAP ELAN chip\n\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int __touch_get_resolution(struct i2c_client *client)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ int rc;
+ uint8_t buf_recv[17] = {0x0};
+ const uint8_t get_resolution_cmd[] = {
+ 0x5B, 0x00, 0x00, 0x00, 0x00, 0x00
+ };
+
+ /* Command not support in IAP recovery mode */
+ if (test_bit(idx_update_fw, &ts->flags))
+ return 0;
+
+ rc = elants_async_recv_data(client, get_resolution_cmd, buf_recv,
+ sizeof(get_resolution_cmd), sizeof(buf_recv));
+ if (rc < 0)
+ return -rc;
+
+ elan_dbg(client,
+ "[ELAN] %x:%x:%x, :%x:%x:%x, %d\n",
+ buf_recv[2], buf_recv[6], buf_recv[10],
+ buf_recv[3], buf_recv[7], buf_recv[0], rc);
+
+ if (buf_recv[0] != 0x9B)
+ return -EINVAL;
+
+ elan_dbg(client, "[ELAN] %x:%x:%x, :%x:%x:%x, %d\n",
+ buf_recv[2], buf_recv[6], buf_recv[10],
+ buf_recv[3], buf_recv[7], buf_recv[11], rc);
+
+
+ ts->rows = (buf_recv[2] + buf_recv[6] + buf_recv[10]);
+ ts->cols = (buf_recv[3] + buf_recv[7] + buf_recv[11]);
+
+ elan_dbg(client, "[ELAN] %x:%x:%x, :%x:%x:%x\n", buf_recv[2],
+ buf_recv[6], buf_recv[10],
+ buf_recv[3], buf_recv[7], buf_recv[11]);
+
+ if (ts->rows < 2 || ts->cols < 2) {
+ dev_err(&client->dev,
+ "[ELAN] Invalid resolution (%d, %d)\n",
+ ts->rows, ts->cols);
+
+ /* set default resolution if TP information is wrong */
+ ts->rows = ELAN_X_MAX;
+ ts->cols = ELAN_Y_MAX;
+
+ rc = ret_fail;
+ }
+
+ /* translate trace number to TSP resolution */
+ ts->cols = ELAN_TS_RESOLUTION(ts->cols);
+ ts->rows = ELAN_TS_RESOLUTION(ts->rows);
+
+ elan_dbg(client,
+ "[ELAN] resolution rows=0x%.2x, "
+ "cols=0x%.2x\n",
+ ts->rows, ts->cols);
+
+ return 0;
+}
+
+
+/**
+ * elan_touch_get_bc_ver - obtain bootcode data from device
+ * @client: the interface we are querying
+
+ *
+ * Send a bootcode version command and fill the results into the
+ * elan device structures. Caller must hold the mutex
+ *
+
+ * Returns 0 or an error code
+ */
+static int __elan_touch_get_bc_ver(struct i2c_client *client)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ const u8 get_bc_ver_cmd[] = {0x53, 0x10, 0x00, 0x01};
+ u8 buf_recv[4];
+ int rc;
+
+ /* Command not support in IAP recovery mode */
+ if (test_bit(idx_update_fw, &ts->flags))
+ return 0;
+
+ rc = elants_acqurie_data(client, get_bc_ver_cmd,
+ buf_recv, sizeof(buf_recv));
+ if (rc < 0) {
+ dev_err(&client->dev,
+ "elan_ts_acqurie_data failed: get_bc_ver\n");
+ return rc;
+ }
+
+ ts->major_bc_version = (((buf_recv[1] & 0x0f) << 4) |
+ ((buf_recv[2]&0xf0) >> 4));
+ ts->minor_bc_version = (((buf_recv[2] & 0x0f) << 4) |
+ ((buf_recv[3]&0xf0) >> 4));
+
+ elan_dbg(client,
+ "ELAN TOUCH MAJOR BC VERSION 0x%02x\n",
+ ts->major_bc_version);
+ elan_dbg(client,
+ "ELAN TOUCH MINOR BC VERSION 0x%02x\n",
+ ts->minor_bc_version);
+
+ return 0;
+}
+
+static int __elan_fastboot(struct i2c_client *client, int *count)
+{
+ int rc = 0;
+
+
+ rc = elants_boot(client, elan_i2c_master, E_BOOT_NORM);
+ if (rc < 0) {
+ if (*count > 0)
+ return -EAGAIN;
+ return -1;
+ }
+
+ msleep(100);
+
+ return rc;
+}
+
+/**
+ * @brief elan_open - open elan device
+ * @param input : input device
+ *
+ */
+static int elan_open(struct input_dev *input)
+{
+ struct elants_data *ts = input_get_drvdata(input);
+
+ dev_err(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ /* wait probe work_func done */
+ while ((ts->status & STA_INIT4) == 0)
+ elan_msleep(1);
+
+ return 0;
+}
+
+/**
+ * @brief elan_close - close input device
+ * @param input : input device
+ *
+ */
+static void elan_close(struct input_dev *input)
+{
+ struct elants_data *ts = input_get_drvdata(input);
+
+ dev_err(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ return;
+}
+
+
+/**
+ * @brief \b elan_ts_setup - initialization process.
+ * @param client : our i2c client
+ *
+ * set our TP up
+ * -# reset
+ * -# hello packet
+ * -# fw version
+ * -# TP info (resolution)
+ *
+ */
+static int __devinit elants_setup(struct i2c_client *client)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ int rc, tries = 3, count = 3;
+ int len = 0;
+ bool fastboot = true;
+
+retry:
+ /*! Reset */
+ elan_hw_reset(client);
+
+ ts->rx_size = queue_header_size;
+
+ /* New BootCode */
+ if (fastboot == true) {
+ rc = __elan_fastboot(client, &count);
+ if (rc < 0) {
+ if (rc == -EAGAIN && --count > 0)
+ goto retry;
+ else {
+ len += sprintf(ts->boot_log + len,
+ "serious bug, BC may be broken!!\n");
+ return -1;
+ }
+ }
+ fastboot = 0;
+ } else {
+ /* Wait bootcode timeout 1 second +
+ Main-flow initial ~100ms */
+ ssleep(2);
+ }
+
+ /*! - elan hello packet init */
+ rc = __hello_packet_handler(client);
+ if (rc < 0) {
+ /* Wrong hello_packet or polling fail, retry */
+ if ((rc == -EINVAL || rc == -ETIMEDOUT) && --tries > 0) {
+ dev_err(&client->dev,
+ "[ELAN] retries=%d, rc=%d\n",
+ tries, rc);
+ goto retry;
+ }
+
+ len += sprintf(ts->boot_log + len,
+ "retry=%d polling time-out\n",
+ 3-tries);
+
+ dev_err(&client->dev,
+ "hello packet error.\n");
+ /* Go through down*/
+
+ /* if iap mode enable, return and wait for IAP */
+ if (ts->iap_mode == IAP_MODE_ENABLE) {
+ len += sprintf(ts->boot_log + len, "IAP mode enable\n");
+ return rc;
+ }
+ }
+
+ elan_dbg(client,
+ "__hello_packet_handler ...\n");
+
+ /*! - elan fw version */
+ rc = __fw_packet_handler(client);
+ if (rc < 0) {
+ dev_err(&client->dev, "firmware checking error.\n");
+ len += sprintf(ts->boot_log+len, "fw_packet_error=%x:%x\n",
+ ts->major_fw_version, ts->minor_fw_version);
+
+ if (rc == -EINVAL) {
+ len += sprintf(ts->boot_log+len,
+ "FW version is empty, IAP enable!!\n");
+ set_bit(idx_update_fw, &ts->flags);
+ ts->iap_mode = IAP_MODE_ENABLE;
+ }
+
+ /* Go through down*/
+ }
+
+ elan_dbg(client, "__fw_packet_handler...\n");
+
+ /*! - elan TP information */
+ rc = __touch_get_resolution(client);
+ if (rc < 0) {
+ dev_err(&client->dev,
+ "TP information checking error.\n");
+ len += sprintf(ts->boot_log+len,
+ "touch_get_resolution=%x:%x\n",
+ ts->rows, ts->cols);
+ /* Go through down*/
+ }
+
+ elan_dbg(client,
+ "__touch_get_resolution...\n");
+
+
+ /* Get TS BootCode version */
+ rc = __elan_touch_get_bc_ver(client);
+ if (rc < 0) {
+ dev_err(&client->dev,
+ "TP get BC version error.\n");
+ len += sprintf(ts->boot_log+len,
+ "touch_get_BC_ver=%x:%x\n",
+ ts->major_bc_version, ts->major_bc_version);
+ /* Go through down*/
+ }
+
+ if (len == 0)
+ len += sprintf(ts->boot_log, "boot success!!\n");
+
+ return rc;
+
+}
+
+
+static int elants_get_power_state(struct i2c_client *client)
+{
+ int rc = 0;
+ const uint8_t cmd[] = {cmd_header_byte_read, 0x50, 0x00, 0x01};
+ uint8_t buf[4], power_state;
+
+ rc = elants_acqurie_data(client, cmd, buf, 4);
+ if (rc)
+ return rc;
+
+ power_state = buf[1];
+ elan_dbg(client,
+ "dump repsponse: %0x\n", power_state);
+ power_state = (power_state & PWR_STATE_MASK) >> 3;
+ elan_dbg(client,
+ "power state = %s\n",
+ power_state == PWR_STATE_DEEP_SLEEP ?
+ "Deep Sleep" : "Normal/Idle");
+
+ return power_state;
+}
+
+
+/**
+ * @brief \b elan_ts_recv_data - received TP data
+ * @param client: our i2c device
+ * @param buf : buffer for put received data
+ *
+ * received data from TP device.
+ */
+static int elants_recv_data(struct i2c_client *client, uint8_t *buf)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ int rc = 0, bytes_to_recv;
+
+ dev_dbg(&client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ if (buf == NULL)
+ return -EINVAL;
+
+ mutex_lock(&ts->tr_mutex);
+
+ bytes_to_recv = ts->rx_size;
+ rc = i2c_master_recv(client, buf, bytes_to_recv);
+
+ dev_dbg(&client->dev,
+ "[ELAN] %d:%d:%x:%x, addr=%x\n", bytes_to_recv, rc,
+ buf[0], buf[34], client->addr);
+ dev_dbg(&client->dev,
+ "[ELAN] %x:%x:%x:%x:%x:%x\n", buf[0], buf[1], buf[2],
+ buf[3], buf[4], buf[5]);
+
+ if (rc != bytes_to_recv) {
+ dev_err(&client->dev,
+ "%s: i2c_master_recv error?!\n",
+ __func__);
+ rc = -EINVAL;
+ }
+ mutex_unlock(&ts->tr_mutex);
+
+ return rc;
+}
+
+/**
+ * elan_touch_pull_frame - pull a frame from the fifo
+ * @ed: our elan touch device
+ * @ehr: return buffer for the header
+ * @buf: data buffer
+ *
+ * Pulls a frame from the FIFO into the provided ehr and data buffer.
+ * The data buffer must be at least cmd_response_len bytes long.
+ */
+static int elan_touch_pull_frame(struct elants_data *ts, u8 *buf)
+{
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ WARN_ON(kfifo_out_locked(&ts->fifo, buf, cmd_response_len,
+ &ts->rx_kfifo_lock)
+ != cmd_response_len);
+ return cmd_response_len;
+}
+
+
+/**
+ * elan_touch_fifo_clean_old - Make room for new frames
+ * @ed: our elan touch device
+ * @room: space needed
+ *
+ * Empty old frames out of the FIFO until we can fit the new one into
+ * the other end.
+ */
+static void elan_touch_fifo_clean_old(struct elants_data *ts, int room)
+{
+ u8 buffer[cmd_response_len];
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ while (kfifo_len(&ts->fifo) + room >= FIFO_SIZE)
+ elan_touch_pull_frame(ts, buffer);
+}
+
+
+/** @brief \b elan_ts_GetRepoInfo - parse Multi-queue report header
+ * @param client : our i2c device
+ * @param buf : buffer data
+ *
+ * parsing report header and get data length.
+ *
+ */
+static int elants_GetRepoInfo(struct i2c_client *client, uint8_t *buf)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ struct multi_queue_header *buff = (struct multi_queue_header *)buf;
+ const u8 wait_packet[4] = {0x64, 0x64, 0x64, 0x64};
+ int times = 10, rc = 0;
+
+ switch (buf[idx_finger_header]) {
+ case cmd_header_byte_hello:
+ if (!memcmp(buf, hello_packet, 4))
+ ts->wdt_reset++;
+ return ret_cmdrsp;
+ case cmd_header_byte_response:
+ /* Queue the data, using the fifo lock to serialize the multiple
+ accesses to the FIFO */
+ elan_dbg(client,
+ "[ELAN] recv cmd_header_byte_response\n");
+
+ mutex_lock(&ts->fifo_mutex);
+ if (kfifo_len(&ts->fifo) + cmd_response_len >= FIFO_SIZE)
+ /* Make room, make room */
+ elan_touch_fifo_clean_old(ts, cmd_response_len);
+ /* Push the data */
+ kfifo_in_locked(&ts->fifo, buf,
+ cmd_response_len, &ts->rx_kfifo_lock);
+ mutex_unlock(&ts->fifo_mutex);
+
+ elan_dbg(client,
+ "[ELAN] wake_up [%02x:%02x:%02x:%02x]\n",
+ buf[0], buf[1], buf[2], buf[3]);
+ wake_up(&ts->wait);
+ return ret_cmdrsp;
+ case cmd_header_byte_rek:
+ /* re-K comand response, ingore it! */
+ return ret_cmdrsp;
+ /* Buffer mode header */
+ case queue_header_byte_normal:
+ elan_dbg(client,
+ "[ELAN] report_count=%d report_len=%d\n",
+ buff->report_count, buff->report_length);
+ if (likely(buff->report_count <= 3)) {
+ ts->mq_header.report_count = buff->report_count;
+ ts->mq_header.report_length = buff->report_length;
+ ts->rx_size = ts->mq_header.report_length;
+ } else
+ return ret_fail;
+
+ break;
+ case queue_header_byte_wait:
+ dev_err(&client->dev,
+ "========queue_header_byte_wait %x:%x:%x:%x========\n",
+ buf[0], buf[1], buf[2], buf[3]);
+ /*! BUGFIX: buff[0] might be wrong (0x63),
+ * check buff[1 ~ 3] is enough
+ */
+ if (!memcmp(buf+1, &wait_packet[1], 3)) {
+ do {
+ udelay(30);
+ elants_recv_data(client, (uint8_t *)buff);
+ } while (buff->packet_id != queue_header_byte_normal &&
+ --times > 0);
+ if (times > 0)
+ rc = elants_GetRepoInfo(client, (uint8_t *)buff);
+ else
+ return ret_fail;
+ elan_dbg(client,
+ "Detect Wait_Header:rx_size=%d, "\
+ "report_count=%d report_len=%d\n",
+ ts->rx_size,
+ ts->mq_header.report_count,
+ ts->mq_header.report_length);
+ } else
+ dev_err(&client->dev,
+ "[ELAN] ERROR!! wait header:%x:%x:%x:%x\n",
+ buf[0], buf[1], buf[2], buf[3]);
+ break;
+ /* Not buffer mode, it's single word mode */
+ case queue_header_byte_Single:
+ ts->mq_header.report_count = 1;
+ ts->mq_header.report_length = IDX_PACKET_SIZE_WIDTH;
+ ts->rx_size = ts->mq_header.report_length;
+ return ts->rx_size;
+ break;
+ default:
+ dev_err(&client->dev,
+ "unknown multi-queue command!! --%x %x:%x:%x--\n",
+ buf[0], buf[1], buf[2], buf[3]);
+ ts->mq_header_fail++;
+
+ /* If glitch causes frame error, drop all finger report */
+ ts->rx_size = queue_packet_max_len;
+ elants_recv_data(client, (uint8_t *)buff);
+ return ret_fail;
+ }
+
+ return ts->rx_size;
+}
+
+
+/** @brief \b elan_touch_checksum - Add for checksum mechanism
+ * @param client : our i2c device
+ * @param buf : buffer data
+ *
+ * caculating checksum for make sure all data validity.
+ *
+ */
+static int elan_touch_checksum(struct i2c_client *client, u8 *buf)
+{
+ u8 i = 0, checksum = 0;
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ /*! FIXME: checksum wasn't including width byte */
+ for (i = 0; i < IDX_PACKET_SIZE_WIDTH - 6; i++)
+ checksum = checksum + buf[i];
+
+ ts->checksum_correct = checksum;
+
+ if (checksum != buf[idx_finger_width_checksum]) {
+ ts->checksum_fail++;
+ dev_err(&client->dev,
+ "elan touch checksum fail: %02x:%02x\n",
+ checksum, buf[idx_finger_width_checksum]);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+/**
+ * @brief \b elan_touch_parse_fid - parse the 10 fid bits
+ * @param data : the input bit stream
+ * @param fid : an array of fid values
+ *
+ * Unpack the 10 bits into an array.
+ *
+ * FIXME: Review whether we can't just use << operators after making
+ * sure the bits are native endian ?
+ */
+static inline void elan_touch_parse_fid(u8 *data, u8 *fid)
+{
+ fid[0] = (data[0] & 0x01);
+ fid[1] = (data[0] & 0x02);
+ fid[2] = (data[0] & 0x04);
+ fid[3] = (data[0] & 0x08);
+ fid[4] = (data[0] & 0x10);
+ fid[5] = (data[0] & 0x20);
+ fid[6] = (data[0] & 0x40);
+ fid[7] = (data[0] & 0x80);
+ fid[8] = (data[1] & 0x10);
+ fid[9] = (data[1] & 0x20);
+}
+
+/**
+ * @brief \b elan_touch_parse_wid - parse the 10 wid bits
+ * @param data : the input bit stream
+ * @param wid : an array of width level
+ *
+ * Unpack the 10 bits into an array.
+ *
+ */
+static inline void elan_touch_parse_wid(u8 *data, u8 *wid)
+{
+ wid[0] = (data[0] >> 4);
+ wid[1] = (data[0] & 0x0f);
+ wid[2] = (data[1] >> 4);
+ wid[3] = (data[1] & 0x0f);
+ wid[4] = (data[2] >> 4);
+ wid[5] = (data[2] & 0x0f);
+ wid[6] = (data[3] >> 4);
+ wid[7] = (data[3] & 0x0f);
+ wid[8] = (data[4] >> 4);
+ wid[9] = (data[4] & 0x0f);
+}
+
+
+static inline int elants_parse_xy(
+ uint8_t *data,
+ uint16_t *x,
+ uint16_t *y)
+{
+ *x = *y = 0;
+
+ *x = (data[0] & 0xf0);
+ *x <<= 4;
+ *x |= data[1];
+
+ *y = (data[0] & 0x0f);
+ *y <<= 8;
+ *y |= data[2];
+
+ return 0;
+}
+
+/* transition stage for lookup by table, maybe update finger report
+ using by Win8 50Byte format that having actual value for X, Y width */
+static inline int elan_lookup_wid(
+ u8 data,
+ u16 *w,
+ u16 *h)
+{
+ static u16 pre_w, pre_h, cur_w, cur_h;
+ const u8 width_lookup_table[15][2] = {
+ {3, 2}, {3, 2}, {6, 3},
+ {6, 3}, {10, 3}, {15, 4},
+ {15, 5}, {15, 5}, {15, 5},
+ {15, 5}, {15, 5}, {15, 5},
+ {15, 5}, {15, 5}, {15, 5},
+ };
+
+ cur_w = width_lookup_table[data][0] * 17;
+ cur_h = width_lookup_table[data][1] * 17;
+
+ /* IIR to balance w, h vaule, don't jitter too much */
+ *w = (cur_w + pre_w) >> 1;
+ *h = (cur_h + pre_h) >> 1;
+
+ pre_w = cur_w;
+ pre_h = cur_h;
+
+ return 0;
+}
+
+static int elan_mt_compute_slot(struct mt_device *td,
+ struct input_dev *input)
+{
+ return input_mt_get_slot_by_key(input, td->curdata.contactid);
+}
+
+/*
+ * this function is called when a whole contact has been processed,
+ * so that it can assign it to a slot and store the data there
+ */
+static void elan_mt_complete_slot(struct mt_device *td,
+ struct input_dev *input)
+{
+ struct elants_data *ts =
+ container_of(td, struct elants_data, td);
+
+ if (td->curvalid) {
+ int slotnum = elan_mt_compute_slot(td, input);
+ struct mt_slot *s = &td->curdata;
+
+ if (slotnum < 0 || slotnum >= td->maxcontacts)
+ return;
+
+ input_mt_slot(input, slotnum);
+ input_mt_report_slot_state(input, MT_TOOL_FINGER,
+ s->touch_state);
+ if (s->touch_state) {
+ /* this finger is on the screen */
+ int wide = (s->w > s->h);
+ /* divided by two to match visual scale of touch */
+ int major = max(s->w, s->h) >> 1;
+ int minor = min(s->w, s->h) >> 1;
+
+ elan_dbg(ts->client,
+ "[ELAN] slot=%d x=%x y=%x w=%x h=%x\n",
+ slotnum, s->x, s->y, major, minor);
+
+ input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
+ input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
+ input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
+ input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
+ input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
+ input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
+ }
+ }
+
+ td->num_received++;
+}
+
+/*
+ * this function is called when a whole packet has been received and processed,
+ * so that it can decide what to send to the input layer.
+ */
+static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
+{
+ input_mt_sync_frame(input);
+ input_sync(input);
+ td->num_received = 0;
+}
+
+
+/** @brief \b elan_mt_event - process finger reports
+ * @param ts: our touchscreen
+ * @param finger_stat : number of fingers in packet
+ * @param buf : received buffer
+ *
+ * Walk the received report and process the finger data, extracting
+ * and reporting co-ordinates. No locking is needed here as the workqueue
+ * does our threading for us.
+ */
+static int elan_mt_event(
+ struct elants_data *ts,
+ int finger_stat,
+ u8 *buf)
+{
+ int i;
+ u8 fid[MAX_CONTACT_NUM], wid[MAX_CONTACT_NUM];
+ u16 x, y, w, h;
+ struct i2c_client *client = ts->client;
+ struct mt_device *td = &ts->td;
+
+ dev_dbg(&client->dev,
+ "[ELAN] Enter elan_mt_event Func\n");
+
+ /* Parsing Finger, Width field */
+ elan_touch_parse_fid(&buf[idx_finger_state], &fid[0]);
+ elan_touch_parse_wid(&buf[idx_finger_width], &wid[0]);
+
+ /* number of fingers expects in this frame */
+ td->num_expected = finger_stat;
+ for (i = 0; i < td->maxcontacts; i++) {
+ if (finger_stat == 0)
+ break;
+
+ /* tracking id */
+ td->curdata.contactid = (fid[i] > 0) ? i+1 : 0;
+
+ if (td->curdata.contactid == 0)
+ continue;
+
+ td->curdata.touch_state = true;
+
+ elants_parse_xy(&buf[3+i*3], &x, &y);
+ td->curdata.x = x;
+ td->curdata.y = y;
+
+ elan_lookup_wid(wid[i], &w, &h);
+ td->curdata.w = w;
+ td->curdata.h = h;
+
+ finger_stat--;
+
+ elan_mt_complete_slot(td, ts->input);
+ }
+
+ if (td->num_received >= td->num_expected)
+ mt_sync_frame(td, ts->input);
+
+ return 1;
+}
+
+
+
+/** @brief \b elants_report_data - report finger report to user space.
+ * @param client : our i2c device
+ * @param buf : raw data from TP device.
+ *
+ * - reporting finger data to user space.
+ * - packet_fail count
+ *
+ */
+static void elants_report_data(struct i2c_client *client, uint8_t *buf)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ switch (buf[idx_finger_header]) {
+ case idx_coordinate_packet_4_finger:
+ case idx_coordinate_packet_10_finger: {
+ u8 finger_stat = buf[idx_finger_total] & 0x0f;
+ elan_dbg(client,
+ "[ELAN] finger_stat == %d\n", finger_stat);
+ elan_dbg(client,
+ "[ELAN] finger:%x:%x:%x:%x:%x\n",
+ buf[0], buf[1], buf[2], buf[3], buf[4]);
+
+ /* Enter right process, reset int_status*/
+ ts->polling.int_status = 0;
+ ts->packet_received++;
+
+ if (likely(finger_stat != 0)) {
+ ts->td.curvalid = true;
+ ts->touched_sync++;
+ } else
+ ts->no_touched_sync++;
+
+ /* Handle mt event */
+ elan_mt_event(ts, finger_stat, buf);
+ }
+ break;
+ default:
+ ts->header_fail++;
+ dev_err(&client->dev,
+ "[ELAN] %s: unknown packet type: %x:%x:%x:%x\n",
+ __func__, buf[0], buf[1], buf[2], buf[3]);
+ break;
+ }
+
+ return;
+}
+
+/** @brief \b elants_drop_packet - err handler that drop all packet.
+ *
+ * mutex protection will at outside this function.
+ *
+ */
+static void elants_drop_packet(struct elants_data *ts)
+{
+ uint8_t buf[queue_packet_max_len] = {0x0};
+
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return;
+
+ if (gpio_get_value(ts->intr_gpio) != 0)
+ goto end;
+
+ /* -# Read multi_queue header */
+ ts->rx_size = queue_header_size;
+ if (elants_recv_data(ts->client, buf) < 0)
+ goto end;
+
+ /* -# Get multi_queue header info*/
+ if (elants_GetRepoInfo(ts->client, buf) > 0) {
+ /* 3. Get finger report data */
+ elants_recv_data(ts->client, buf);
+ udelay(10);
+ if (gpio_get_value(ts->intr_gpio) != 0)
+ goto end;
+ }
+
+ /* -#received all packet till ts->intr pull high */
+ ts->rx_size = 1;
+ while (gpio_get_value(ts->intr_gpio) == 0) {
+ elants_recv_data(ts->client, buf);
+ udelay(10);
+ }
+
+end:
+ ts->rx_size = queue_header_size;
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Leave %s\n", __func__);
+
+ return;
+}
+
+
+
+/** @brief \b elan_ts_pollWork_func - regular processing
+ * @param work : pass from kernel
+ *
+ * poll_timer polled processing to occur
+ * elan_ts_pollWork_func() to check if our ts
+ * is abnormal.
+ *
+ */
+static void elants_pollWork_func(struct work_struct *work)
+
+{
+ struct elants_data *ts =
+ container_of(work, struct elants_data, pollingwork);
+
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ goto fail;
+
+ if (gpio_get_value(ts->intr_gpio) != 0)
+ goto fail;
+ else {
+ ts->polling.int_status++;
+ if (ts->polling.int_status < 3)
+ goto fail;
+ }
+
+ /* - we use mutex_trylock() here since polling is not very important */
+ if (!mutex_trylock(&ts->mutex)) {
+ elan_dbg(ts->client,
+ "[ELAN] trylock fail! return...\n");
+ goto fail;
+ }
+
+ if (test_bit(idx_finger_report, &ts->flags)) {
+ elan_dbg(ts->client,
+ "[ELAN] 1.finger_Report processing ... ignore!!\n");
+ goto unlock;
+ }
+
+ if (test_bit(idx_cmd_handshake, &ts->flags)) {
+ elan_dbg(ts->client,
+ "[ELAN] 2.command processing ... ignore!!\n");
+ goto unlock;
+ }
+
+ dev_err(&ts->client->dev,
+ "[ELAN] Force to release intr_gpio!!\n");
+
+ ts->drop_frame++;
+ elants_drop_packet(ts);
+
+unlock:
+ mutex_unlock(&ts->mutex);
+
+fail:
+ return;
+}
+
+static irqreturn_t elants_work_func(int irq, void *work)
+{
+ struct elants_data *ts = work;
+ uint8_t buf[queue_packet_max_len] = {0x0};
+ u8 pos = 0, rc;
+
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ if (test_bit(idx_update_fw, &ts->flags))
+ return IRQ_HANDLED;
+
+ /* - this means that we have already serviced it or glich happen!! */
+ if (gpio_get_value(ts->intr_gpio) != 0) {
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Leave %s(gpio)\n", __func__);
+ return IRQ_HANDLED;
+ }
+
+ mutex_lock(&ts->mutex);
+
+ set_bit(idx_finger_report, &ts->flags);
+
+ /* - Read multi_queue header */
+ if (elants_recv_data(ts->client, buf) < 0)
+ goto fail;
+
+ /* - Get multi_queue header info */
+ rc = elants_GetRepoInfo(ts->client, buf);
+ if (rc < 0 || rc == ret_cmdrsp)
+ goto fail;
+
+ /* - Get finger report data */
+ if (elants_recv_data(ts->client, buf) < 0)
+ goto fail;
+
+ clear_bit(idx_finger_report, &ts->flags);
+
+ mutex_unlock(&ts->mutex);
+
+ /* - parsing report and send out */
+ while (ts->mq_header.report_count--) {
+ if (elan_touch_checksum(ts->client, buf + pos) == 0)
+ elants_report_data(ts->client, buf + pos);
+ pos = pos + IDX_PACKET_SIZE_WIDTH;
+ udelay(10);
+ }
+
+ ts->rx_size = queue_header_size;
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Leave %s\n", __func__);
+ return IRQ_HANDLED;
+
+fail:
+ clear_bit(idx_finger_report, &ts->flags);
+ mutex_unlock(&ts->mutex);
+ ts->rx_size = queue_header_size;
+
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Leave %s(Fail)\n", __func__);
+ return IRQ_HANDLED;
+}
+
+/**
+ * @brief \b elants_poll_timer_func - err handler when intr_gpio is low but no isr serviced it.
+ * @param data : our ts
+ *
+ * intr_gpio polling checking, it'll force to get data if intr_gpio is low
+ * and not in isr routine.
+ *
+ */
+static void elants_poll_timer_func(unsigned long data)
+{
+ struct elants_data *ts = (struct elants_data *)data;
+ struct elan_polling *timer = &ts->polling;
+
+ dev_dbg(&ts->client->dev,
+ "[ELAN] Enter %s\n", __func__);
+
+ /* - ignore it if normal work is processing */
+ if (work_pending(&ts->work)) {
+ dev_dbg(&ts->client->dev,
+ "[ELAN] 1.work_pending ... ignore!!\n");
+ goto reset;
+ }
+
+ /* - ignore it if poll_timer work is processing */
+ if (work_pending(&ts->pollingwork)) {
+ dev_dbg(&ts->client->dev,
+ "[ELAN] 2.work_pending ... ignore!!\n");
+ goto reset;
+ }
+
+ if (!queue_work(timer->elan_wq, &ts->pollingwork))
+ dev_err(&ts->client->dev,
+ "[ELAN] pollWork active failed!!\n");
+
+reset:
+ timer->timer.expires = jiffies + 10 * HZ;
+ add_timer(&ts->polling.timer);
+
+ return;
+}
+
+static irqreturn_t elants_irq_handler(int irq, void *dev_id)
+{
+ struct elants_data *ts = dev_id;
+ struct i2c_client *client = ts->client;
+
+ dev_dbg(&client->dev, "[ELAN] %s\n", __func__);
+
+ ts->irq_received++;
+
+ return IRQ_WAKE_THREAD;
+}
+
+
+static int elants_register_interrupt(struct i2c_client *client)
+{
+ struct elants_data *ts = i2c_get_clientdata(client);
+ int err = -1;
+
+ if (client->irq) {
+
+ ts->use_irq = 1;
+
+ err = request_threaded_irq(client->irq, elants_irq_handler,
+ elants_work_func,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ client->name, ts);
+ if (err) {
+ dev_err(&client->dev,
+ "%s: request_irq %d failed\n",
+ __func__, client->irq);
+ goto err;
+ }
+
+ ts->status |= STA_USE_IRQ;
+
+ elan_dbg(client,
+ "[ELAN] %s in interrupt mode\n", ts->input->name);
+ }
+err:
+ return err;
+}
+
+static int remove_elants(struct i2c_client *client)
+{
+ int ret = 0;
+ struct elants_data *ts = i2c_get_clientdata(client);
+
+ if (&client->dev.kobj)
+ sysfs_remove_group(&client->dev.kobj, &elan_attribute_group);
+
+ if (ts->use_irq) {
+ if (client->irq)
+ free_irq(client->irq, ts);
+ }
+
+ input_mt_destroy_slots(ts->input);
+
+ if (ts->input)
+ input_unregister_device(ts->input);
+
+ if (ts->polling.elan_wq)
+ destroy_workqueue(ts->polling.elan_wq);
+
+ if (&ts->polling.timer) {
+ ret = del_timer(&ts->polling.timer);
+ if (ret != 0)
+ dev_err(&client->dev,
+ "[ELAN] del_timer fail!!\n");
+ }
+
+ if (&ts->mutex)
+ mutex_destroy(&ts->mutex);
+ if (&ts->tr_mutex)
+ mutex_destroy(&ts->tr_mutex);
+ if (&ts->fifo_mutex)
+ mutex_destroy(&ts->fifo_mutex);
+
+ if (ts->fw_enabled) {
+ ret = misc_deregister(&ts->firmware);
+ if (ret < 0)
+ dev_err(&client->dev,
+ "[ELAN] misc_deregister fail!!\n");
+ }
+
+ kfree(ts->td.slots);
+
+ /* free kfifo */
+ kfifo_free(&ts->fifo);
+ kfree(ts);
+
+ return ret;
+}
+
+
+/**
+ * probe_thread_func - init touch device.
+ * @work: /int work queue
+ *
+ * Perform real probe for our I2C device and if successful configure
+ * it up as an input device. If not then clean up and return an error
+ * code.
+ */
+
+static int probe_thread_func(void *data)
+{
+ struct elants_data *ts = data;
+ struct i2c_client *client = ts->client;
+ int err = 0;
+
+ mutex_lock(&ts->mutex);
+
+ err = elants_setup(client);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "[ELAN] %s probe failed\n",
+ ELAN_DEV_NAME);
+ /* User can IAP anyway, continue */
+ }
+
+ set_bit(BTN_TOUCH, ts->input->keybit);
+
+ /*! - Single touch input params setup */
+ input_set_abs_params(ts->input, ABS_X, 0, ts->cols, 0, 0);
+ input_set_abs_params(ts->input, ABS_Y, 0, ts->rows, 0, 0);
+ input_set_abs_params(ts->input, ABS_PRESSURE, 0, 255, 0, 0);
+
+ /*! @warning FIXME: ABS_MT_PRESSURE can be supported by FW.
+ currently we have done it by ABS_MT_WIDTH_MAJOR */
+ /*! - Multitouch input params setup */
+ input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->cols, 0, 0);
+ input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->rows, 0, 0);
+ input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+ input_set_abs_params(ts->input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
+
+ /* not test, keep mark for less Android-ICS */
+ input_set_abs_params(ts->input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
+
+ __set_bit(EV_ABS, ts->input->evbit);
+ __set_bit(EV_SYN, ts->input->evbit);
+
+ input_set_drvdata(ts->input, ts);
+
+ err = input_register_device(ts->input);
+ if (err) {
+ dev_err(&client->dev,
+ "[ELAN] %s unable to register input device\n",
+ ELAN_DEV_NAME);
+ goto fail_un;
+ }
+
+ ts->td.slots = kzalloc(MAX_CONTACT_NUM * sizeof(struct mt_slot),
+ GFP_KERNEL);
+ if (!ts->td.slots) {
+ dev_err(&client->dev,
+ "cannot allocate multitouch slots\n");
+ goto fail_un;
+ }
+ ts->td.maxcontacts = MAX_CONTACT_NUM;
+ ts->td.mt_flags |= INPUT_PROP_DIRECT;
+
+ input_mt_init_slots(ts->input, ts->td.maxcontacts, ts->td.mt_flags);
+ /* set frame rate size as 100fps */
+ input_set_events_per_packet(ts->input, 100);
+
+ /*! @warning If the firmware device fails
+ * we carry on as it doesn't stop normal
+ usage */
+ private_ts = &ts->firmware;
+ if (elants_register_interrupt(ts->client) < 0) {
+ dev_err(&client->dev,
+ "[ELAN] %s register_interrupt failed!\n",
+ ELAN_DEV_NAME);
+ goto fail_un;
+ }
+
+ /*! - Register SW watchdog timer */
+ init_timer(&ts->polling.timer);
+ /*! - check intr_gpio every 10secs */
+ ts->polling.timer.expires = jiffies + 10 * HZ;
+ ts->polling.timer.function = &elants_poll_timer_func;
+ ts->polling.timer.data = (unsigned long)ts;
+ add_timer(&ts->polling.timer);
+
+ mutex_unlock(&ts->mutex);
+
+ ts->status |= STA_INIT4;
+
+ return 0;
+
+fail_un:
+ mutex_unlock(&ts->mutex);
+ remove_elants(client);
+ return err;
+}
+
+
+
+/**
+ * @brief elants_probe - probe for touchpad
+ * @param client : our I2C client
+ *
+ * Perform setup and probe for our I2C device and if successful configure
+ * it up as an input device. If not then clean up and return an error
+ * code.
+ */
+static int __devinit elants_probe(
+ struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ long err = -1;
+ struct elan_i2c_platform_data *pdata = NULL;
+ struct elants_data *ts =
+ kzalloc(sizeof(struct elants_data), GFP_KERNEL);
+
+ if (ts == NULL)
+ return -ENOMEM;
+
+ ts->status |= STA_PROBED;
+
+ mutex_init(&ts->mutex);
+ mutex_init(&ts->tr_mutex);
+ mutex_init(&ts->fifo_mutex);
+ init_waitqueue_head(&ts->wait);
+ spin_lock_init(&ts->rx_kfifo_lock);
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev,
+ "[ELAN] %s: i2c check functionality error\n",
+ ELAN_DEV_NAME);
+ goto fail_un;
+ }
+
+ /*! - Regular polling Process */
+ ts->polling.elan_wq = create_singlethread_workqueue("elan_poll_wq");
+ if (!ts->polling.elan_wq) {
+ dev_err(&client->dev,
+ "[ELAN] %s: create workqueue failed\n",
+ ELAN_DEV_NAME);
+ goto fail_un;
+ }
+
+ /* INIT polling machinams */
+ INIT_WORK(&ts->pollingwork, elants_pollWork_func);
+
+ pdata = client->dev.platform_data;
+ if (!pdata) {
+ dev_err(&client->dev,
+ "[ELAN] %s no platform data\n",
+ ELAN_DEV_NAME);
+ goto fail_un;
+ }
+
+ ts->status &= STA_INIT;
+
+ ts->intr_gpio = pdata->intr_gpio;
+ ts->rst_gpio = pdata->rst_gpio;
+ /* set initial i2c address */
+ client->addr = elan_i2c_master;
+ ts->i2caddr = client->addr;
+
+ elan_dbg(client,
+ "reset=%d, intr=%d\n", ts->rst_gpio, ts->intr_gpio);
+
+ ts->client = client;
+ i2c_set_clientdata(client, ts);
+
+ /* INIT kfifo */
+ err = kfifo_alloc(&ts->fifo, FIFO_SIZE, GFP_KERNEL);
+ if (!kfifo_initialized(&ts->fifo)) {
+ dev_err(&client->dev,
+ "%s error kfifo_alloc\n", __func__);
+ goto fail_un;
+ }
+
+ ts->status &= STA_INIT2;
+
+ ts->input = input_allocate_device();
+ if (ts->input == NULL) {
+ dev_err(&client->dev,
+ "[ELAN] %s Failed to allocate input device\n",
+ ELAN_DEV_NAME);
+ goto fail_un;
+ }
+
+ ts->input->name = ELAN_DEV_NAME;
+ ts->input->open = elan_open;
+ ts->input->close = elan_close;
+
+ /* Says HELLO to touch device */
+ ts->thread = kthread_run(probe_thread_func, ts, client->name);
+ if (IS_ERR(ts->thread)) {
+ err = PTR_ERR(ts->thread);
+ goto fail_un;
+ }
+
+ ts->status &= STA_INIT3;
+
+ /* - register sysfs @} */
+ elan_dbg(client,
+ "[ELAN] create sysfs!!\n");
+ if (sysfs_create_group(&client->dev.kobj, &elan_attribute_group))
+ dev_err(&client->dev,
+ "[ELAN] sysfs create group error\n");
+
+
+ return 0;
+
+fail_un:
+ remove_elants(client);
+ return err;
+}
+
+static int __devexit elants_remove(struct i2c_client *client)
+{
+ return remove_elants(client);
+}
+
+#ifdef CONFIG_PM_SLEEP
+/** @brief \b elan_ts_suspend - enter sleep mode
+ *
+ * when Suspend mode, disable_irq and cancel work queue.
+ *
+ */
+static int elants_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+ const u8 set_sleep_cmd[] = {0x54, 0x50, 0x00, 0x01};
+ int rc = 0;
+
+ dev_err(&client->dev,
+ "[ELAN] %s: enter\n", __func__);
+
+ /* Command not support in IAP recovery mode */
+ if (test_bit(idx_update_fw, &ts->flags))
+ return 0;
+
+ disable_irq(client->irq);
+ cancel_work_sync(&ts->work);
+
+ mutex_lock(&ts->mutex);
+ rc = elants_set_data(client,
+ set_sleep_cmd, sizeof(set_sleep_cmd));
+
+ if (rc < 0)
+ goto end;
+
+ ts->power_state = 0;
+ /* de-active timer */
+ del_timer_sync(&ts->polling.timer);
+
+
+end:
+ mutex_unlock(&ts->mutex);
+ return rc;
+}
+
+
+/** @brief \b elan_ts_resume - enter wake-up mode
+ *
+ * when Wake-up mode, enable_irq.
+ *
+ */
+static int elants_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct elants_data *ts = i2c_get_clientdata(client);
+ const u8 set_active_cmd[] = {0x54, 0x58, 0x00, 0x01};
+ int rc = 0, retry = 5;
+
+ dev_err(&client->dev,
+ "[ELAN] %s: enter\n", __func__);
+
+ /* Command not support in IAP recovery mode */
+ if (test_bit(idx_update_fw, &ts->flags))
+ return 0;
+
+ mutex_lock(&ts->mutex);
+
+ do {
+ rc = elants_set_data(client,
+ set_active_cmd, sizeof(set_active_cmd));
+ elan_msleep(2);
+ rc = elants_get_power_state(client);
+ if (unlikely(rc != PWR_STATE_NORMAL))
+ dev_err(&client->dev,
+ "[ELAN] %s: wake up tp failed! err = %d\n",
+ __func__, rc);
+ else
+ break;
+ } while (--retry);
+
+ ts->power_state = 1;
+ mutex_unlock(&ts->mutex);
+
+ /* re-active poll timer */
+ mod_timer(&ts->polling.timer, jiffies + 10 * HZ);
+
+ enable_irq(client->irq);
+
+ return rc;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(elants_pm, elants_suspend, elants_resume);
+
+/*! brief system registeration */
+static const struct i2c_device_id elan_ts_id[] = {
+ { ELAN_DEV_NAME, 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, elan_ts_id);
+
+/*! brief system registeration */
+static struct i2c_driver elan_ts_driver = {
+ .probe = elants_probe,
+ .remove = __devexit_p(elants_remove),
+ .id_table = elan_ts_id,
+ .driver = {
+ .name = ELAN_DEV_NAME,
+ .owner = THIS_MODULE,
+ .bus = &i2c_bus_type,
+ .pm = &elants_pm,
+ },
+};
+
+module_i2c_driver(elan_ts_driver);
+
+
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_DESCRIPTION("Elan Microelectronics Touchpanels");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/i2c/elants.h b/include/linux/i2c/elants.h
new file mode 100644
index 0000000..df46e1e
--- /dev/null
+++ b/include/linux/i2c/elants.h
@@ -0,0 +1,56 @@
+#ifndef _LINUX_I2C_ELANTS_H
+#define _LINUX_I2C_ELANTS_H
+
+#define ELAN_DEV_NAME "elants_i2c"
+
+/* set TSP resolution by actual TPM */
+#define ELAN_X_MAX 2944
+#define ELAN_Y_MAX 1856
+
+
+/*! @brief \b platform data
+ * @param intr_gpio : gpio pin
+ * @param rst_gpio : interuption pin
+ *
+ * Platform data, all platform dependent variable should put here.
+ *
+ */
+struct elan_i2c_platform_data {
+ unsigned short version;
+ unsigned int abs_x_min;
+ unsigned int abs_x_max;
+ unsigned int abs_y_min;
+ unsigned int abs_y_max;
+ int intr_gpio;
+ int rst_gpio;
+};
+
+/*! @brief \b ioctl command definition.
+ * @param IOCTL_I2C_SLAVE : set i2c address that would be controled right now.
+ * @param IOCTL_MAJOR_FW_VER : fw major number
+ * @param IOCTL_MINOR_FW_VER : fw minor number
+ * @param IOCTL_RESET : Hardware Reset
+ * @param IOCTL_SET_COMMAND : control command set to TP device.
+ * @param IOCTL_GET_COMMAND : get response from our TP device.
+ * @param IOCTL_IAP_ENABLE : Enter IAP mode
+ * @param IOCTL_IAP_DISABLE : Leave IAP mode
+ * @param IOCTL_I2C_INT : gpio status
+ *
+ *
+ * ioctl command, easy user to control our TP from application.
+ *
+ */
+#define ELAN_IOCTLID 0xD0
+#define IOCTL_I2C_SLAVE _IOW(ELAN_IOCTLID, 1, int)
+#define IOCTL_MAJOR_FW_VER _IOR(ELAN_IOCTLID, 2, int)
+#define IOCTL_MINOR_FW_VER _IOR(ELAN_IOCTLID, 3, int)
+#define IOCTL_RESET _IOW(ELAN_IOCTLID, 4, int)
+#define IOCTL_I2C_INT _IOR(ELAN_IOCTLID, 8, int)
+#define IOCTL_SET_COMMAND _IOW(ELAN_IOCTLID, 9, unsigned long)
+#define IOCTL_GET_COMMAND _IOR(ELAN_IOCTLID, 10, unsigned long)
+#define IOCTL_IAP_ENABLE _IOW(ELAN_IOCTLID, 11, int)
+#define IOCTL_IAP_DISABLE _IOW(ELAN_IOCTLID, 12, int)
+#define IOCTL_CHECK_RECOVERY_MODE _IOR(ELAN_IOCTLID, 13, int)
+#define IOCTL_BOOTCODE_CMD _IOW(ELAN_IOCTLID, 14, unsigned long)
+
+#endif /* _LINUX_I2C_ELANTS_H */
--
1.7.9.5
--
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