Hi Scott,
Some comments and questions below,
Thanks,
-JJ
Scott Liu <scott.liu@xxxxxxxxxx> writes:
> This patch is for Elan eKTF Touchscreen product, I2C adpater module.
>
> This driver adds communication support with Elan eKTF controller using I2C bus.
>
> Signed-off-by: Scott Liu <scott.liu@xxxxxxxxxx>
> ---
> drivers/input/touchscreen/Kconfig | 9 +
> drivers/input/touchscreen/Makefile | 1 +
> drivers/input/touchscreen/elants_i2c.c | 3182 ++++++++++++++++++++++++++++++++
> include/linux/i2c/elants.h | 61 +
> 4 files changed, 3253 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..d87b2ef
> --- /dev/null
> +++ b/drivers/input/touchscreen/elants_i2c.c
> @@ -0,0 +1,3182 @@
> +/*
> + * Elan Microelectronics touchpanels with I2C interface
> + *
> + * Copyright (C) 2012 Elan Microelectronics Corporation.
> + * Scott Liu <scott.liu@xxxxxxxxxx>
> + *
> + * This code is partly based on hid-multitouch.c:
> + *
> + * Copyright (c) 2010-2012 Stephane Chatty <chatty@xxxxxxx>
> + * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@xxxxxxxxx>
> + * 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.
> + *
> + */
> +
> +#define CHIP_NUM 2
What does this constant mean? What chip does this refer to?
> +
> +/* Reserved for having platform to test */
> +#define MT_TYPE_B 0
Can't we just go MT-B all the way? Reserved to test what?
> +/* Define it if using on Android system */
> +#define ANDROID 0
Please just target mainline. Or at least make this a Kconfig option and
add a second patch for Android.
> +#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>
> +#if (ANDROID)
Please drop this.
> +#include <linux/wakelock.h>
> +#include <linux/earlysuspend.h>
> +#endif
> +#if (MT_TYPE_B)
I definitely think we should always use MT-B.
> +#include <linux/input/mt.h>
> +#endif
> +
> +/* 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_4FIG 17
> +#define IDX_PACKET_SIZE_WIDTH 40
> +
> +#define FINGER_NUM 10
> +
> +#define PWR_STATE_DEEP_SLEEP 0
> +#define PWR_STATE_NORMAL 1
> +#define PWR_STATE_MASK BIT(3)
> +
> +#define CMD_S_PKT 0x52
> +#define CMD_R_PKT 0x53
> +#define CMD_W_PKT 0x54
> +
> +#define HELLO_PKT 0x55
> +#define NORMAL_PKT 0x62
> +
> +#define RESET_PKT 0x77
> +#define CALIB_PKT 0xA8
> +
> +#define FINGER_ID 1
> +
> +#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 };
> +
> +#include <linux/i2c/elants.h>
Move this up with the rest of the includes.
> +/*! Firmware protocol status flag */
> +#define PRO_I2C_WRT_CMD_SYNC 0x00000001
> +#define PRO_HID_MOD_CHECKSUM 0x00000002
> +#define PRO_UPDATE_FW_MODE 0x00000080
> +
> +
> +/*! 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,
> + 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,
> +};
Seems odd to define these as an enum. Define constants?
> +/*! @enum lock_bit Lock bit definition */
> +enum lock_bit {
> + idx_file_operate = 0,
> + idx_cmd_handshake = 1,
> + idx_finger_report = 2,
> + idx_test_mode = 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;
> +
> +/* FW read command, 0x53 0x?? 0x0, 0x01 */
> +enum {
> + E_ELAN_INFO_FW_VER = 0x00,
> + E_ELAN_INFO_BC_VER = 0x10,
> + E_ELAN_INFO_FW_ID = 0xf0
> +};
> +
> +
> +/*! @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? */
> + struct mt_slot *slots;
> +};
With Benjamin's i2c-hid implimentation, is it possible to make
hid-multitouch not depend on USBHID and reuse it to drive this device?
> +
> +/**
> +*
> +* @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
Why not add this as a Kconfig entry?
> + /* 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 thread*/
> + struct workqueue_struct *elan_wq;
> + /* normal function work queue*/
> + struct work_struct work;
> + /* start probe start*/
> + struct task_struct *thread;
> + /* char device for ioctl and IAP*/
> + struct miscdevice firmware;
> + /* use timer if use_irq == 0*/
> + struct hrtimer timer;
> + /* regular polling work thread*/
> + struct work_struct pollingwork;
> + /* regular polling work queue*/
> + struct elan_polling polling;
> +#if (ANDROID)
> + struct early_suspend early_suspend;
> + /* avoid sleep during IAP.*/
> + struct wake_lock wakelock;
> +#endif
Please drop this.
> + /* Protects I2C accesses to device*/
> + struct mutex mutex;
> + /* Protects I2C tx/rx*/
> + struct mutex tr_mutex;
> +
> + /* Lock openers*/
> + unsigned long busy;
> + /* Protocol stats for firmware*/
> + unsigned int protocol;
> +
> + /* 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 int elants_set_data(struct i2c_client *client,
> + const u8 *data,
> + size_t len);
> +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);
> +
> +static void elants_drop_packet(struct elants_data *ts);
> +static irqreturn_t elants_work_func(int irq, void *work);
> +
> +static irqreturn_t elants_irq_handler(int irq, void *dev_id);
> +static int elan_hw_reset(struct i2c_client *client);
> +static int elan_touch_pull_frame(struct elants_data *ts, u8 *buf);
> +
> +#ifdef CONFIG_HAS_EARLYSUSPEND
> +static void elants_early_suspend(struct early_suspend *h);
> +static void elants_late_resume(struct early_suspend *h);
> +#endif
Android specific. Please drop.
> +
> +/*=================================================
> + * Global variable
> + *=================================================*/
> +
> +/*! for elan-iap char driver */
> +static struct miscdevice *private_ts;
Firmware updating functionality? What about try to use sysfs entry?
And it would be easier to review if you split firmware updating code
into another patch.
> +static bool old_bootcode = false;
> +
> +static u8 tp_device_addr[3] = {elan_i2c_master,
> + elan_i2c_slave1,
> + elan_i2c_slave2
> + };
> +
> +
> +#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 __issue_bootcode_cmd - hadle bootcode status.
> + * @param client : our i2c device
> + *
> + * @return { >0 means success,
> + * otherwise fail. }
> + *
> + * Enter Normal mode packet is {0x55, 0x55, 0x55, 0x55}
> + * 2012/3/1 won't issue bootcmd in normal driver initial flow.
> + */
> +static int elan_bootcode_cmd(struct i2c_client *client,
> + u8 passcode)
> +{
> + int rc = 0;
> + struct elants_data *ts = i2c_get_clientdata(client);
> + u8 command[2][4] = {
> + {0x45, 0x49, 0x41, 0xFF}, /* normal_command */
> + {0x45, 0x49, 0x41, 0x50}, /* iap_command */
> + };
> +
> + /* Detect old / new FW */
> + elan_msleep(90);
> +
> + if (gpio_get_value(ts->intr_gpio) == 0) {
> + /* Old FW */
> + pr_warn("detect intr!!!!! OLD BC detect\n");
> + return -2;
> + }
> +
> + if (passcode > E_BOOT_IAP)
> + return -1;
> +
> + elan_dbg(client, "passcode = %x:%x:%x:%x\n",
> + command[passcode][0],
> + command[passcode][1],
> + command[passcode][2],
> + command[passcode][3]);
> +
> + mutex_lock(&ts->mutex);
> +
> + ts->i2caddr = elan_i2c_slave2;
> + rc = elants_set_data(client, command[passcode], 4);
> + if (rc < 0)
> + dev_err(&ts->client->dev,
> + "[ELAN] set passcode[%d] fail\n", passcode);
> +
> + ts->i2caddr = elan_i2c_slave1;
> + rc = elants_set_data(client, command[passcode], 4);
> + if (rc < 0)
> + dev_err(&ts->client->dev,
> + "[ELAN] set passcode[%d] fail\n", passcode);
> +
> + ts->i2caddr = elan_i2c_master;
> + rc = elants_set_data(client, command[passcode], 4);
> + if (rc < 0)
> + dev_err(&ts->client->dev,
> + "[ELAN] set passcode[%d] fail\n", passcode);
> +
> + /* normal communitcat interactives with Master. */
> + ts->i2caddr = elan_i2c_master;
> + mutex_unlock(&ts->mutex);
> +
> + return rc;
> +}
> +
> +/**
> +* @brief \b elan_iap_open - char device
> +*
> +* purpose for ioctl and iap updating fw.
> +*/
> +int elan_iap_open(struct inode *inode, struct file *filp)
> +{
> + struct elants_data *ts ;
> +
> + filp->private_data = private_ts;
> + ts = container_of(filp->private_data,
> + struct elants_data, firmware);
> + dev_dbg(&ts->client->dev,
> + "[ELAN] Enter %s\n", __func__);
> +
> + return 0;
> +}
> +
> +/**
> +* @brief \b elan_iap_release - char device
> +*
> +* purpose for close this device
> +*/
> +int elan_iap_release(struct inode *inode, struct file *filp)
> +{
> + struct elants_data *ts =
> + container_of(filp->private_data,
> + struct elants_data, firmware);
> + dev_dbg(&ts->client->dev,
> + "[ELAN] Enter %s\n", __func__);
> +
> + return 0;
> +}
> +
> +/**
> +* @brief \b elan_iap_write - iap write page data
> +* @param buff is page data from user space
> +* @param count is number of data in byte.
> +*
> +* purpose for iap write page data
> +*/
> +ssize_t elan_iap_write(struct file *filp,
> + const char *buff,
> + size_t count,
> + loff_t *offp)
> +{
> + struct elants_data *ts =
> + container_of(filp->private_data,
> + struct elants_data, firmware);
> + int ret;
> + u8 txbuf[256];
> + struct i2c_adapter *adap = ts->client->adapter;
> + struct i2c_msg msg;
> +
> + if (count > 256)
> + return -EMSGSIZE;
> +
> + if (copy_from_user(txbuf, buff, count))
> + return -EFAULT;
> +
> + msg.addr = ts->i2caddr;
> + msg.flags = ts->client->flags & I2C_M_TEN;
> + msg.len = count;
> + msg.buf = (char *)txbuf;
> +
> + ret = i2c_transfer(adap, &msg, 1);
> + if (ret != 1)
> + dev_err(&ts->client->dev,
> + "[ELAN] i2c_master_send fail, ret=%d\n", ret);
> +
> + /* If everything went ok (i.e. 1 msg transmitted), return #bytes
> + transmitted, else error code. */
> + return (ret == 1) ? count : ret;
> +}
> +
> +/**
> +* @brief \b elan_iap_read - read status code from TP
> +*
> +* purpose for iap read status code from TP
> +*/
> +ssize_t elan_iap_read(struct file *filp,
> + char *buff,
> + size_t count,
> + loff_t *offp)
> +{
> + struct elants_data *ts =
> + container_of(filp->private_data,
> + struct elants_data, firmware);
> + u8 rxbuf[256];
> + int ret;
> + struct i2c_adapter *adap = ts->client->adapter;
> + struct i2c_msg msg;
> +
> + if (count > 256)
> + return -EMSGSIZE;
> +
> + msg.addr = ts->i2caddr;
> + msg.flags = ts->client->flags & I2C_M_TEN;
> + msg.flags |= I2C_M_RD;
> + msg.len = count;
> + msg.buf = rxbuf;
> +
> + ret = i2c_transfer(adap, &msg, 1);
> + if (ret == 1)
> + if (copy_to_user(buff, rxbuf, count))
> + return -EFAULT;
> +
> + /* If everything went ok (i.e. 1 msg transmitted), return #bytes
> + transmitted, else error code. */
> + return (ret == 1) ? count : ret;
> +}
> +
> +/**
> +* @brief \b elan_iap_ioctl - ioctl
> +* @param cmd to control our TP device.
> +* @param arg is parameter from user space
> +*
> +* purpose is that control our TP by char device node.
> +*/
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
> +static int elan_iap_ioctl(struct inode *inode,
> + struct file *filp,
> + unsigned int cmd,
> + unsigned long arg)
> +#else
> +static long elan_iap_ioctl(struct file *filp,
> + unsigned int cmd,
> + unsigned long arg)
> +#endif
> +{
> + struct elants_data *ts =
> + container_of(filp->private_data,
> + struct elants_data, firmware);
> + int __user *argp = (int __user *)arg;
> + u8 len, buf[32];
> + int rc;
> +
> + switch (cmd) {
> + case IOCTL_I2C_SLAVE:
> + ts->i2caddr = (unsigned short)arg;
> + break;
> + case IOCTL_MAJOR_FW_VER:
> + put_user(ts->major_fw_version, argp);
> + break;
> + case IOCTL_MINOR_FW_VER:
> + put_user(ts->minor_fw_version, argp);
> + break;
> + case IOCTL_CHECK_RECOVERY_MODE:
> + put_user(ts->iap_mode, argp);
> + break;
> + case IOCTL_IAP_ENABLE: {
> + disable_irq(ts->client->irq);
> +#if (ANDROID)
> + wake_lock(&ts->wakelock);
> +#endif
> + ts->protocol |= PRO_UPDATE_FW_MODE;
> + }
> + break;
> + case IOCTL_IAP_DISABLE:
> + ts->protocol &= ~PRO_UPDATE_FW_MODE;
> +#if (ANDROID)
> + wake_unlock(&ts->wakelock);
> +#endif
> + enable_irq(ts->client->irq);
> + break;
> + case IOCTL_BOOTCODE_CMD: {
> + int mode;
> +
> + len = 1;
> + if (copy_from_user(buf, (const void *)arg, len))
> + return -EFAULT;
> +
> + mode = buf[0];
> + rc = elan_bootcode_cmd(ts->client, (u8)mode);
> + if (rc < 0) {
> + elan_dbg(ts->client,
> + "elan_bootcode_command error\n");
> + return -1;
> + }
> + }
> + break;
> + case IOCTL_RESET:
> + pr_warn("[ELAN] IOCTL_RESET\n");
> + rc = elan_hw_reset(ts->client);
> + if (rc < 0) {
> + elan_dbg(ts->client,
> + "[ELAN] elan_hw_reset error\n");
> + return -1;
> + }
> + break;
> + case IOCTL_I2C_INT:
> + put_user(gpio_get_value(ts->intr_gpio), argp);
> + break;
> + case IOCTL_SET_COMMAND: {
> + struct i2c_client *client = ts->client;
> + struct elan_ioctl_data idata;
> +
> + if (copy_from_user(&idata.len,
> + (const void *)arg,
> + sizeof(idata.len))) {
> + dev_err(&client->dev,
> + "IOCTL_GET_COMMAND:%x:%x:%x:%x fail\n",
> + buf[0], buf[1], buf[2], buf[3]);
> + return -EFAULT;
> + }
> +
> + if (copy_from_user(&idata,
> + (const void *)arg,
> + idata.len + sizeof(int))) {
> + dev_err(&client->dev,
> + "IOCTL_GET_COMMAND:%x:%x:%x:%x fail\n",
> + buf[0], buf[1], buf[2], buf[3]);
> + return -EFAULT;
> + }
> + dev_dbg(&ts->client->dev,
> + "IOCTL_SET_COMMAND:%x:%x:%x:%x\n",
> + idata.buf[0],
> + idata.buf[1],
> + idata.buf[2],
> + idata.buf[3]);
> +
> + if (idata.buf[0] != CMD_R_PKT &&
> + idata.buf[0] != CMD_W_PKT)
> + return -EFAULT;
> +
> + mutex_lock(&ts->mutex);
> + elants_set_data(ts->client,
> + (const u8 *)idata.buf,
> + idata.len);
> + mutex_unlock(&ts->mutex);
> + }
> + break;
> + case IOCTL_GET_COMMAND: {
> + int rc = 0;
> + struct i2c_client *client = ts->client;
> + struct elan_ioctl_data idata;
> +
> + /* Get command length first */
> + if (copy_from_user(&idata.len,
> + (const void *)arg,
> + sizeof(idata.len))) {
> + dev_err(&client->dev,
> + "IOCTL_GET_COMMAND:%x:%x:%x:%x fail\n",
> + buf[0], buf[1], buf[2], buf[3]);
> + return -EFAULT;
> + }
> +
> + /* Get command real length then */
> + if (copy_from_user(&idata, (const void *)arg,
> + idata.len + sizeof(int))) {
> + dev_err(&client->dev,
> + "IOCTL_GET_COMMAND:%x:%x:%x:%x fail\n",
> + buf[0], buf[1], buf[2], buf[3]);
> + return -EFAULT;
> + }
> +
> + if (idata.buf[0] != CMD_R_PKT && idata.buf[0] != CMD_W_PKT)
> + return -EFAULT;
> +
> + pr_info("[ELAN] IOCTL_GET_COMMAND %x:%x:%x:%x\n",
> + idata.buf[0], idata.buf[1], idata.buf[2], idata.buf[3]);
> +
> + mutex_lock(&ts->mutex);
> +
> + set_bit(idx_cmd_handshake, &ts->busy);
> +
> + elants_set_data(client, idata.buf, idata.len);
> + mutex_unlock(&ts->mutex);
> +
> + /* We will wait for non O_NONBLOCK handles until a signal or data */
> + mutex_lock(&ts->fifo_mutex);
> +
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
> + while (kfifo_len(ts->fifo) == 0) {
> +#else
> + while (kfifo_len(&ts->fifo) == 0) {
> +#endif
> + mutex_unlock(&ts->fifo_mutex);
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
> + rc = wait_event_interruptible_timeout(
> + ts->wait, kfifo_len(ts->fifo),
> + msecs_to_jiffies(3000));
> +#else
> + rc = wait_event_interruptible_timeout(
> + ts->wait, kfifo_len(&ts->fifo),
> + msecs_to_jiffies(3000));
> +#endif
Please drop these CPP version magic. Target only current mainline kernel.
> + if (rc <= 0) {
> + rc = -ETIMEDOUT;
> + dev_err(&client->dev,
> + "timeout!! wake_up(ts->wait)\n");
> + goto err2;
> + }
> + mutex_lock(&ts->fifo_mutex);
> + }
> + if (elan_touch_pull_frame(ts, idata.buf) < 0) {
> + rc = -1;
> + goto err1;
> + }
> +
> +err1:
> + mutex_unlock(&ts->fifo_mutex);
> +err2:
> + clear_bit(idx_cmd_handshake, &ts->busy);
> +
> + dev_dbg(&client->dev,
> + "[ELAN] Leave %s\n", __func__);
> +
> + if (rc < 0) {
> + rc = copy_to_user((void __user *)arg,
> + (void *)&idata,
> + 4+sizeof(len));
> + return -rc;
> + }
> +
> + elan_dbg(client,
> + "Reponse=%x:%x:%x:%x\n",
> + idata.buf[0],
> + idata.buf[1],
> + idata.buf[2],
> + idata.buf[3]);
> +
> + if (copy_to_user((void __user *)arg,
> + (void *)&idata,
> + sizeof(idata)))
> + return -EFAULT;
> +
> + }
> + break;
> + default:
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static const struct file_operations elan_touch_fops = {
> + .owner = THIS_MODULE,
> + .open = elan_iap_open,
> + .write = elan_iap_write,
> + .read = elan_iap_read,
> + .release = elan_iap_release,
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
> + .ioctl = elan_iap_ioctl,
> +#else
> + .unlocked_ioctl = elan_iap_ioctl,
> +#endif
> +};
Please drop this. Use sysfs and target mainline.
> +/**
> + * @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 = container_of(dev, struct i2c_client, dev);
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + if (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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 =
> + container_of(dev, struct 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 = container_of(dev, struct i2c_client, dev);
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + if (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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 =
> + container_of(dev, struct i2c_client, dev);
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + if (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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 = container_of(dev, struct i2c_client, dev);
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + if (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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 =
> + container_of(dev, struct i2c_client, dev);
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + if (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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 =
> + container_of(dev, struct i2c_client, dev);
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + if (ts->protocol & PRO_UPDATE_FW_MODE)
> + return -1;
> +
> +
> + mutex_lock(&ts->mutex);
> + set_bit(idx_cmd_handshake, &ts->busy);
> + 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->busy);
> + 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 =
> + container_of(dev, struct 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 =
> + container_of(dev, struct 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 = container_of(dev, struct i2c_client, dev);
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + 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);
> +
> + return sprintf(buf, "%s\n", "re-K finish");
> +}
> +
> +
> +static ssize_t show_boot_log(
> + struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct i2c_client *client = container_of(dev, struct 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 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_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 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 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;
> +}
> +
> +/**
> + * @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.
> + */
> +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 ((rc < 0) || memcmp(buf_recv, iniap_packet, 4)) {
> + dev_err(&client->dev,
> + "[elan] %s: ID 0x%x can't boot IAP!\n",
> + __func__, addr);
> + rc = -EINVAL;
> + }
> +
> + 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, i;
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + elan_hw_reset(client);
> +
> + /* Boot devices to IAP mode */
> + for (i = 0; i < CHIP_NUM; i++) {
> + rc = elants_boot(client, tp_device_addr[i], E_BOOT_IAP);
> + if (rc < 0)
> + return rc;
> + }
> +
> + elan_msleep(10);
> +
> + /* Check if devices can enter IAP mode */
> + for (i = 0; i < CHIP_NUM; i++) {
> + rc = elants_is_iap(client, tp_device_addr[i]);
> + if (rc < 0)
> + return rc;
> + }
> +
> + ts->iap_mode = IAP_MODE_ENABLE;
> + ts->protocol = ts->protocol | PRO_UPDATE_FW_MODE;
> + ts->i2caddr = elan_i2c_master;
> +
> + return rc;
> +}
> +
> +
> +/**
> + * @brief \b elan_ts_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 __get_bc_version - probe /INT to get new/old BC
> + * @param client : our i2c device
> + *
> + * 1 : new bootcode
> + * 0 : old bootcode
> + */
> +static int __get_bc_version(struct i2c_client *client)
> +{
> + struct elants_data *ts = i2c_get_clientdata(client);
> +
> + /* wait 150ms to probe /INT and get old-BC, new-BC status */
> + msleep(150);
> +
> + if (gpio_get_value(ts->intr_gpio) == 0) {
> + /* Old BC */
> + pr_info("[ELAN]detect intr=>Old FW\n");
> + old_bootcode = true;
> + } else {
> + /* New BC */
> + pr_info("[elan]detect intr=>New FW\n");
> + old_bootcode = false;
> + }
> +
> + return old_bootcode;
> +}
> +
> +
> +/**
> + * @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);
> +
> + elan_dbg(client,
> + "[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;
> + }
> +
> + /* new iap main-flow recovery mechanism 20120518*/
> + if (memcmp(buf_recv, hello_packet, 4) ||
> + elants_is_iap(client, elan_i2c_slave1) > 0) {
> + dev_err(&client->dev,
> + "[ELAN] got mainflow recovery message\n");
> + elants_enter_iap(client);
> + return -EINVAL;
> + }
> +
> + 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_R_PKT, 0x00, 0x00, 0x01};
> + uint8_t buf_recv[4] = {0x0};
> +
> + /* Command not support in IAP recovery mode */
> + if (ts->protocol & PRO_UPDATE_FW_MODE)
> + return 0;
> +retry:
> + rc = elants_acqurie_data(client, cmd, buf_recv, 4);
> + if (rc < 0)
> + return rc;
> +
> + if (buf_recv[0] == CMD_S_PKT) {
> + 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);
> +
> + /* For 1+2, support this function since Solution version 0.3E(2012/2/23) */
> + 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 (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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%02x, cols = 0x%02x\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 (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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_slave1, E_BOOT_NORM);
> + if (rc < 0) {
> + if (*count > 0)
> + return -EAGAIN;
> + return -1;
> + }
> +
> + 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 = 5, count = 5;
> + 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", 5-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");
> + ts->protocol = ts->protocol | PRO_UPDATE_FW_MODE;
> + 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_R_PKT, 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__);
> +
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
> + WARN_ON(kfifo_get(ts->fifo, buf, cmd_response_len)
> + != cmd_response_len);
> +#else
> + WARN_ON(kfifo_out_locked(&ts->fifo, buf, cmd_response_len,
> + &ts->rx_kfifo_lock)
> + != cmd_response_len);
> +#endif
Target mainline.
> + 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__);
> +
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
> + while (kfifo_len(ts->fifo) + room >= FIFO_SIZE)
> + elan_touch_pull_frame(ts, buffer);
> +#else
> + while (kfifo_len(&ts->fifo) + room >= FIFO_SIZE)
> + elan_touch_pull_frame(ts, buffer);
> +#endif
Mainline.
> +}
> +
> +
> +/** @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 LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
> + if (kfifo_len(ts->fifo) + cmd_response_len >= FIFO_SIZE)
> +#else
> + if (kfifo_len(&ts->fifo) + cmd_response_len >= FIFO_SIZE)
> +
> +#endif
> + /* Make room, make room */
> + elan_touch_fifo_clean_old(ts, cmd_response_len);
> + /* Push the data */
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
> + kfifo_put(ts->fifo, buf, cmd_response_len);
> +#else
> + kfifo_in_locked(&ts->fifo, buf,
> + cmd_response_len, &ts->rx_kfifo_lock);
> +#endif
Alse mainline.
> + 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;
> + /* 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)
> +{
> + int i;
> + for (i = 0; i < td->maxcontacts; ++i) {
> + if (td->slots[i].contactid == td->curdata.contactid &&
> + td->slots[i].touch_state)
> + return i;
> + }
> + for (i = 0; i < td->maxcontacts; ++i) {
> + if (!td->slots[i].seen_in_this_frame &&
> + !td->slots[i].touch_state)
> + return i;
> + }
> + /* should not occurs. If this happens that means
> + * that the device sent more touches that it says
> + * in the report descriptor. It is ignored then. */
> + return -1;
> +}
> +
> +/*
> + * 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)
> +{
> + td->curdata.seen_in_this_frame = true;
> + if (td->curvalid) {
> + int slotnum = elan_mt_compute_slot(td);
> +
> + if (slotnum >= 0 && slotnum < td->maxcontacts)
> + td->slots[slotnum] = td->curdata;
> + }
> + 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.
> + */
> +
> +#if (MT_TYPE_B == 0)
> +static void elan_mt_emit_event(
> + struct mt_device *td,
> + struct input_dev *input)
> +{
> + struct elants_data *ts =
> + container_of(td, struct elants_data, td);
> + int i;
> +
> + for (i = 0; i < td->maxcontacts; ++i) {
> + struct mt_slot *s = &(td->slots[i]);
> + if (!s->seen_in_this_frame) {
> + if (s->touch_state) {
> + s->touch_state = false;
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39)
> + /* ingore finger-up event since TF1 seems having problem */
> + input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, s->touch_state);
> + input_mt_sync(input);
> +#endif
> + }
> + s->seen_in_this_frame = false;
> + continue;
> + }
> +
> + input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, 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] i=%d x=%x y=%x w=%x h=%x, p=%x\n",
> + i, s->x, s->y, major, minor, s->p);
> +
> + input_event(input, EV_ABS, ABS_MT_TRACKING_ID, s->contactid);
> + 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);
> +#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 32)
> + input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
> +#endif
> + input_event(input, EV_ABS, ABS_MT_WIDTH_MAJOR, major);
> +
> +#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 32)
> + /* Can't not report on Android 2.2, 10th finger will disorder */
> + input_event(input, EV_ABS, ABS_MT_WIDTH_MINOR, minor);
> +#endif
> + }
> + input_mt_sync(input);
> + s->seen_in_this_frame = false;
> + }
> +
> + input_sync(input);
> + td->num_received = 0;
> +}
> +#else /* For Android ICS, input protocol-B */
> +static void elan_mt_emit_event(
> + struct mt_device *td,
> + struct input_dev *input)
> +{
> + struct elants_data *ts =
> + container_of(td, struct elants_data, td);
> + int i;
> +
> + for (i = 0; i < td->maxcontacts; ++i) {
> + struct mt_slot *s = &(td->slots[i]);
> + if (!s->seen_in_this_frame)
> + s->touch_state = false;
> +
> + input_mt_slot(input, i);
> + 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] i=%d x=%x y=%x w=%x h=%x\n",
> + i, 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);
> + }
> + s->seen_in_this_frame = false;
> + }
> +
> + input_mt_report_pointer_emulation(input, true);
> + input_sync(input);
> + td->num_received = 0;
> +}
> +
> +#endif
> +
> +
> +/** @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[FINGER_NUM], wid[FINGER_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);
> + }
> +
> + if (td->num_received >= td->num_expected)
> + elan_mt_emit_event(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;
> + /* Old way for report input event
> + elan_touch_report_fingers(ts, finger_stat, buf); */
> + elan_mt_event(ts, finger_stat, buf);
> + ts->touched_sync++;
> + } else {
> + input_mt_sync(ts->input);
> + ts->no_touched_sync++;
> + input_sync(ts->input);
> + }
> + }
> + 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 (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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 (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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->busy)) {
> + elan_dbg(ts->client,
> + "[ELAN] 1.finger_Report processing ... ignore!!\n");
> + goto unlock;
> + }
> +
> + if (test_bit(idx_cmd_handshake, &ts->busy)) {
> + 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 (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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->busy);
> +
> + /* Report one setting */
> + /* ts->rx_size = 40; */ /* queue_header_size; */
> + /* ts->mq_header.report_count=1; */
> +
> +
> + /* - 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->busy);
> +
> + 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->busy);
> + 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 elan_touch_timer_func - poll processing
> + * @param timer : our timer
> + *
> + * Queue polled processing to occur on our touch panel and kick the timer
> + * off again
> + *
> + * CHECK: we have no guarantee that the timer will not run multiple times
> + * within one poll, does it matter ?
> + */
> +static enum hrtimer_restart elan_touch_timer_func(struct hrtimer *timer)
> +{
> + struct elants_data *ts = container_of(timer, struct elants_data, timer);
> + queue_work(ts->elan_wq, &ts->work);
> + hrtimer_start(&ts->timer,
> + ktime_set(0, 12500000), HRTIMER_MODE_REL);
> +
> + return HRTIMER_NORESTART;
> +}
> +
> +/**
> + * @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 = 0;
> +
> + 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);
> +
> + ts->status |= STA_USE_IRQ;
> +
> + elan_dbg(client,
> + "[ELAN] %s in interrupt mode\n", ts->input->name);
> + }
> +
> + if (!ts->use_irq) {
> + hrtimer_init(&ts->timer,
> + CLOCK_MONOTONIC, HRTIMER_MODE_REL);
> + ts->timer.function = elan_touch_timer_func;
> + hrtimer_start(&ts->timer, ktime_set(1, 0),
> + HRTIMER_MODE_REL);
> + elan_dbg(client,
> + "[ELAN] %s in time-polling mode\n", ts->input->name);
> + }
> +
> + 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);
> +
> +#ifdef CONFIG_HAS_EARLYSUSPEND
> + if (&ts->early_suspend)
> + unregister_early_suspend(&ts->early_suspend);
> +#endif
> +
> + if (ts->use_irq) {
> + if (client->irq)
> + free_irq(client->irq, ts);
> + } else {
> + if (&ts->timer)
> + hrtimer_cancel(&ts->timer);
> + }
> +
> +#if (MT_TYPE_B)
> + input_mt_destroy_slots(ts->input);
> +#endif
> +
> + if (ts->input)
> + input_unregister_device(ts->input);
> +
> + if (ts->elan_wq)
> + destroy_workqueue(ts->elan_wq);
> +
> + 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);
> +#if (ANDROID)
> + wake_lock_destroy(&ts->wakelock);
> +#endif
> +
> + 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);
> +#if (MT_TYPE_B == 0)
> + input_set_abs_params(ts->input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
> + input_set_abs_params(ts->input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0);
> + input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 1, 0, 0);
> + input_set_abs_params(ts->input, ABS_MT_TOUCH_MINOR, 0, 1, 0, 0);
> +
> + input_set_abs_params(ts->input, ABS_MT_TRACKING_ID, 0, FINGER_NUM, 0, 0);
> +#else
> + 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);
> +#endif
> +
> + __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(FINGER_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 = FINGER_NUM;
> +#if (MT_TYPE_B)
> + input_mt_init_slots(ts->input, ts->td.maxcontacts);
> +#endif
> +
> + /*! @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 (ANDROID)
> + wake_lock_init(&ts->wakelock, WAKE_LOCK_SUSPEND, "elan_touch");
> +#endif
> +
> + 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;
> + }
> +
> + /* @{ - Normal operatin (Finger report) */
> + ts->elan_wq = create_singlethread_workqueue("elan_wq");
> + if (!ts->elan_wq) {
> + dev_err(&client->dev,
> + "[ELAN] %s: create workqueue failed\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;
> + }
> +
> +
> + /*! - IAP Device Initial */
> + ts->firmware.minor = MISC_DYNAMIC_MINOR;
> + ts->firmware.name = "elan-iap";
> + ts->firmware.fops = &elan_touch_fops;
> + ts->firmware.mode = S_IRWXUGO;
> +
> + if (unlikely(misc_register(&ts->firmware) < 0))
> + dev_err(&client->dev,
> + "[ELAN] IAP device register failed!!");
> + else {
> + elan_dbg(client,
> + "[ELAN] IAP device register finished!!");
> + ts->fw_enabled = 1;
> + }
> +
> + 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;
> +
> +#ifdef CONFIG_HAS_EARLYSUSPEND
> + ts->early_suspend.level = EARLY_SUSPEND_LEVEL_STOP_DRAWING - 1;
> + ts->early_suspend.suspend = elants_early_suspend;
> + ts->early_suspend.resume = elants_late_resume;
> + register_early_suspend(&ts->early_suspend);
> +#endif
> +
> + /* - 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 i2c_client *client, pm_message_t mesg)
> +{
> + 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 (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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 i2c_client *client)
> +{
> + 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 (ts->protocol & PRO_UPDATE_FW_MODE)
> + 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
> +
> +
> +#ifdef CONFIG_HAS_EARLYSUSPEND
Convert to mainline PM functions. Use CONFIG_PM_SLEEP and SIMPLE_DEV_PM_OPS
> +/** @brief \b elants_early_suspend - enter sleep mode
> + *
> + * This function is called by kernel,
> + * elan_ts_early_suspend() -> elan_ts_suspend()
> + *
> + */
> +static void elants_early_suspend(struct early_suspend *h)
> +{
> + struct elants_data *ts =
> + container_of(h, struct elants_data, early_suspend);
> + dev_dbg(&ts->client->dev,
> + "Enter %s\n", __func__);
> +
> + elants_suspend(ts->client, PMSG_SUSPEND);
> + return;
> +}
> +
> +/** @brief \b elants_late_resume - enter wake-up mode
> + *
> + * This function is called by kernel,
> + * elan_ts_late_resume() -> elan_ts_resume()
> + *
> + */
> +static void elants_late_resume(struct early_suspend *h)
> +{
> + struct elants_data *ts =
> + container_of(h, struct elants_data, early_suspend);
> + dev_dbg(&ts->client->dev,
> + "Enter %s\n", __func__);
> +
> + elants_resume(ts->client);
> + return;
> +}
> +#endif
> +
> +/*! 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),
> +#ifndef CONFIG_HAS_EARLYSUSPEND
> + .suspend = elants_suspend,
> + .resume = elants_resume,
> +#endif
> + .id_table = elan_ts_id,
> + .driver = {
> + .name = ELAN_DEV_NAME,
> + .owner = THIS_MODULE,
> + .bus = &i2c_bus_type,
> + },
> +};
> +
> +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)
> +static int __devinit elan_ts_init(void)
> +{
> + return i2c_add_driver(&elan_ts_driver);
> +}
> +
> +static void __exit elan_ts_exit(void)
> +{
> + i2c_del_driver(&elan_ts_driver);
> + return;
> +}
> +module_init(elan_ts_init);
> +module_exit(elan_ts_exit);
> +#else
> +module_i2c_driver(elan_ts_driver);
Target mainline and use this only.
> +#endif
> +
> +MODULE_VERSION(DRIVER_VERSION);
> +MODULE_DESCRIPTION("Elan TouchScreen Driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/i2c/elants.h b/include/linux/i2c/elants.h
> new file mode 100644
> index 0000000..5b45a0c
> --- /dev/null
> +++ b/include/linux/i2c/elants.h
> @@ -0,0 +1,61 @@
> +#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;
> +};
> +
> +struct elan_ioctl_data {
> + int len;
> + char buf[32];
> +};
> +
> +/*! @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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