Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753802Ab2JQF6F (ORCPT ); Wed, 17 Oct 2012 01:58:05 -0400 Received: from emcscan.emc.com.tw ([192.72.220.5]:36064 "EHLO emcscan.emc.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751959Ab2JQF6B (ORCPT ); Wed, 17 Oct 2012 01:58:01 -0400 From: Scott Liu To: Scott Liu , Dmitry Torokhov , linux-input@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Benjamin Tissoires , Jesse , Vincent Wang , Paul Subject: [PATCH v1] Support Elan Touchscreen eKTF product. Date: Wed, 17 Oct 2012 05:57:59 +0800 Message-Id: <1350424679-20725-1-git-send-email-scott.liu@emc.com.tw> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 83458 Lines: 3309 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 --- 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 + * + * This code is partly based on hid-multitouch.c: + * + * Copyright (c) 2010-2012 Stephane Chatty + * Copyright (c) 2010-2012 Benjamin Tissoires + * 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 + +/* Reserved for having platform to test */ +#define MT_TYPE_B 0 + +/* Define it if using on Android system */ +#define ANDROID 0 + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#if (ANDROID) +#include +#include +#endif +#if (MT_TYPE_B) +#include +#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 + +/*! 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, +}; + +/*! @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 */ +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; +}; + + +/** +* +* @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 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 + + /* 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 + + +/*================================================= + * Global variable + *=================================================*/ + +/*! for elan-iap char driver */ +static struct miscdevice *private_ts; +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 + 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 +}; + + +/** + * @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 + 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 +} + + +/** @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 + 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 +/** @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); +#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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/