电容屏驱动，输入设备注册，I2C设备注册,中断注册，虽然没有完全调试成功

SSL_TSC.C

/* multi_touch_xx.c - Part of lm_sensors, Linux kernel modules for hardware monitoring Copyright (C) 1998, 1999 Frodo Looijaard <[e-mail]> and Philip Edelbrock <[e-mail]> Copyright (C) 2003 Greg Kroah-Hartman <[e-mail]> Copyright (C) 2003 IBM Corp. 2004-01-16 Jean Delvare <[e-mail]> Divide the multi_touch_xx in 32-byte (arbitrary) slices. This significantly speeds sensors up, as well as various scripts using the multi_touch_xx module. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.*//* * What this driver doesn't yet support: * * - SPI * - INT2 handling * - Pulse detection (and the sysctls to control it) */#include <linux/cdev.h>#include <linux/kernel.h>#include <linux/init.h>#include <linux/module.h>#include <linux/slab.h>#include <linux/jiffies.h>#include <linux/interrupt.h>#include <linux/i2c.h>#include <linux/mutex.h>#include <linux/input.h>#include <asm/gpio.h>#include <linux/delay.h>#include <asm/irq.h>#include <linux/irq.h>/* Size of multi_touch_xx in bytes */int NASTECH_TS_MAJOR = 60; #define SLAVE_ADD 0x60#define TOUCH_INT_PINGPIO_NUM(0,29)/* Use our own dbg macro */#define dbg(format, arg...) printk("----[%s: %d]: " format , __FUNCTION__ , __LINE__, ## arg)#define mmadbg(format, arg...) printk("----[%s: %d]: " format , __FUNCTION__ , __LINE__, ## arg) /* Addresses to scan */static unsigned short normal_i2c[] = { 0x60, I2C_CLIENT_END };/* Insmod parameters */I2C_CLIENT_INSMOD;//I2C_CLIENT_INSMOD_1(multi_touch_xx);static int irq_no=-1;/* Each client has this additional data */static int nastech_i2c_continue_read(struct i2c_client *clinet, u8* buffer, u8 len); typedef struct{ u32 u32X; /* X coordinate, 0~2047 */ u32 u32Y; /* Y coordinate, 0~2047 */ u8 u8Finger; /* Number of fingers in the touch event */ u32 u32Dis_X; /* X distance between two fingers */ u32 u32Dis_Y; /* Y distance between two fingers. This value could be negative */} TOUCH_DATA_st;static struct work_struct nas_works;static struct i2c_client *myI2C_client=NULL;struct nas_cdev { struct cdev *cdev;};/* Structure for Input Type*/struct nas_ts_priv {uint32_t local_irq;struct nas_cdev cdev;TOUCH_DATA_st *touchData;//struct i2c_client *client;struct i2c_client *client;struct input_dev *input;//int reported_finger_count;u16 keybuff[20];// number of key K1 K2 ...K5#ifdef REPORTALLu16 prekeybuff[20];// number of key K1 K2 ...K5#endifchar phys[32];};static struct nas_ts_priv *nas_priv = NULL;#define ST_PEN_UP 0#define ST_PEN_DOWN 1u8 Calculate_8BitsChecksum( u8 *msg, s32 s32Length ){ s32 s32Checksum = 0; s32 i; for ( i = 0 ; i < s32Length; i++ ) { s32Checksum += msg[i]; } return (u8)( ( -s32Checksum ) & 0xFF );}#define REPORT_PACKET_LENGTH 8void nas_ts_irq_callback(void){// read coordinate thought I2C u8 val[REPORT_PACKET_LENGTH] = {0}; u8 Checksum = 0; nas_priv->touchData->u32X = 0; nas_priv->touchData->u32Y = 0; nas_priv->touchData->u32Dis_X = 0; nas_priv->touchData->u32Dis_Y = 0; nas_priv->touchData->u8Finger = 0;printk("**************************/n");printk("***nas_ts_irq_callback***/n");printk("**************************/n");static bool pen_updown = false; //1(true) for down, 0(false) for upstatic bool pre_pen_updown = ST_PEN_UP; myI2C_client = nas_priv->client;if(nastech_i2c_continue_read(myI2C_client,&val[0], REPORT_PACKET_LENGTH ) >= 0){Checksum = Calculate_8BitsChecksum( val, (REPORT_PACKET_LENGTH-1) ); if ( ( Checksum == val[7] && val[0] == 0x52 ) ) // Check the packet ID(0x52)and checksum { /* parsing the coordinate report packet */ /* MSG20XX EVK report format */ /* * +---------------------------------+ * byte[0] | Packet ID ( 0x52 ) | * +----------------+----------------+ * byte[1] | u32X[11:8] | u32Y[11:8] | * +---------------------------------+ * byte[2] | u32X[7:0] | * +---------------------------------+ * byte[3] | u32Y[7:0] | * +----------------+----------------+ * byte[4] | u32Dis_X[11:8] | u32Dis_Y[11:8] | * +----------------+----------------+ * byte[5] | u32Dis_X[7:0] | * +---------------------------------+ * byte[6] | u32Dis_Y[7:0] | * +---------------------------------+ * byte[7] | Checksum | * +---------------------------------+ */ nas_priv->touchData->u32X = ( val[1] & 0xF0 ) << 4 | val[2]; nas_priv->touchData->u32Y = ( val[1] & 0x0F )<< 8 | val[3]; nas_priv->touchData->u32Dis_X = ( val[4] & 0xF0 ) << 4 | val[5]; nas_priv->touchData->u32Dis_Y = ( val[4] & 0x0F ) << 8 | val[6]; printk("<<<<<<<<<data<<<<<<<<<<<<</n");printk("<x=%d,y=%d,dx=%d,dy=%d,</n",nas_priv->touchData->u32X,nas_priv->touchData->u32Y,nas_priv->touchData->u32Dis_X,nas_priv->touchData->u32Dis_Y);printk("<<<<<<<<<data<<<<<<<<<<<<</n"); if ( nas_priv->touchData->u32X == 0xFFF && nas_priv->touchData->u32Y == 0xFFF && nas_priv->touchData->u32X == 0xFFF && nas_priv->touchData->u32Y == 0xFFF ) { /* The coordinate report stands for a Touch-End event */ /* Inform the OS or system mailbox that the Touch-End event happened */ } else { /* The coordinate report stands for Touch-On-Panel event */ if ( nas_priv->touchData->u32Dis_X == 0 && nas_priv->touchData->u32Dis_Y == 0 ) { /* If the distance values are zero, the TP detects one-finger-touch event */ nas_priv->touchData->u8Finger = 1; } else if ( nas_priv->touchData->u32Dis_X <= 2047 && nas_priv->touchData->u32Dis_Y <= 2047 ) { /* If the distance values are valid, the TP detects two-finger-touch event */ nas_priv->touchData->u8Finger = 2; } else { #ifdef DEBUGprintk(" /* Fetal error */n/* Discard the invalid coordinate reports due to fetal error. *//n");#endif } } } else { /* Packet error happened. */ /* Check I2C signal quality and I2C master codes */ }input_report_abs(nas_priv->input, ABS_X, nas_priv->touchData->u32X);input_report_abs(nas_priv->input, ABS_Y, nas_priv->touchData->u32Y);input_report_abs(nas_priv->input, ABS_HAT0X, nas_priv->touchData->u32Dis_X);input_report_abs(nas_priv->input, ABS_HAT0Y, nas_priv->touchData->u32Dis_Y);input_sync(nas_priv->input);}}static void nastech_ts_work(struct work_struct *work){nas_ts_irq_callback();}static int multi_touch_xx_probe(struct i2c_client *client,const struct i2c_device_id *id);static int __devexit multi_touch_xx_remove(struct i2c_client *client);static const struct i2c_device_id multi_touch_xx_id[]={{"multi_touch_xx",0},{}};/* This is the driver that will be inserted */static struct i2c_driver multi_touch_xx_driver = {.driver = {.name= "multi_touch_xx",.owner = THIS_MODULE,},//.id= I2C_DRIVERID_multi_touch_xx,.probe= multi_touch_xx_probe,.remove= __devexit_p(multi_touch_xx_remove),.id_table= multi_touch_xx_id,};static irqreturn_t nastech_ts_isr(int irq, void *dev_id){//disable_irq(ON_TOUCH_INT);disable_irq(&nas_priv->local_irq);schedule_work(&nas_works);enable_irq( &nas_priv->local_irq);return IRQ_HANDLED;}static int nastech_i2c_continue_read(struct i2c_client *clinet, u8* buffer, u8 len){//unsigned char buffer[8];int rc;//buffer[0] = addr;if (1 != (rc = i2c_master_send(clinet, 0x60, 1))){//printk("i2c i/o error: rc == %d (should be 1)/n", rc);mmadbg("i2c i/o error: rc == %d (should be 1)/n", rc);}//msleep(10);if (1 != (rc = i2c_master_recv(clinet, &buffer[0], len))){//dbg("i2c i/o error: rc == %d (should be 1)/n", rc);mmadbg("i2c i/o error: rc == %d (should be 1)/n", rc);}printk(">>> nastech_i2c_continue_read>>>>>>>>>>>%x,>>>>>>>>>>>>/n",buffer[0]);dbg("read : addr:value = 0x%x:0x%x/n", 0x60, buffer[0] );return (buffer[0]);}static int multi_touch_xx_probe(struct i2c_client *client,const struct i2c_device_id *id){u8 value[8];int err = 0;uint32_t irq;struct i2c_client *new_client;//struct nas_ts_data *nastech_data;struct input_dev *pInput_dev;static struct nas_ts_priv *nas_priv = NULL;INIT_WORK(&nas_works, nastech_ts_work);/*----------------------i2c init---------------------*/printk("/***************************/n");printk("/*******multi_touch_xx_probe********************/n");printk("/***************************/n");//================================//// Register as I2C Client ////================================//if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)){goto exit;}printk(">>>>>>after check_functionality/n");if(!(nas_priv=kzalloc(sizeof(struct nas_ts_priv), GFP_KERNEL))){err = -ENOMEM;goto exit;}printk(">>>>>>after zalloc/n");nas_priv->client=kzalloc(sizeof(struct i2c_client),GFP_KERNEL);new_client=nas_priv->client;//=====================================================================================================================////nas_priv->nas_ts_datap = nastech_data; printk(">1oc/n");//nas_priv->client = &nastech_data->client;printk("2loc/n");i2c_set_clientdata(new_client,nas_priv);//printk(">>>>>>after i2c_set_clientdata/n");nas_priv->client->addr = 0x60;printk(">>>3oc/n");nas_priv->client->adapter = client->adapter;printk(">>4alloc/n");nas_priv->client->driver = &multi_touch_xx_driver;printk(">5c/n");nas_priv->client->flags = 0;printk(">>>6alloc/n");//=====================================================================================================================//// Touch Panel Setting & Calibrate ////=====================================================================================================================////=====================================================================================================================////================================//// Register as Input Device ////================================//printk(">>>>>>before input allocate/n");pInput_dev = input_allocate_device();printk(">>>>>>after input allocate/n");if(!pInput_dev) {printk(KERN_ERR"[%s - %d] malloc memory for pInput_dev ERR!/n", __FUNCTION__, __LINE__);goto exit_kfree;}printk("input/n");nas_priv->input=pInput_dev;nas_priv->input->evbit[0] = BIT_MASK (EV_SYN)| BIT_MASK (EV_ABS) | BIT_MASK (EV_KEY) ;//mult touchnas_priv->input->keybit [BIT_WORD (BTN_TOUCH)] = BIT_MASK (BTN_TOUCH);// printk("input_set_abs_params/n");input_set_abs_params(nas_priv->input, ABS_X, 0, 1791, 0, 0);//³]©wµŽ¹ï®yŒÐªº³Ì€j­È»P³Ì€p­Èinput_set_abs_params(nas_priv->input, ABS_Y, 0, 1023, 0, 0);//³]©wµŽ¹ï®yŒÐªº³Ì€j­È»P³Ì€p­Èinput_set_abs_params(nas_priv->input, ABS_HAT0X, 0, 1791, 0, 0);//³]©wµŽ¹ï®yŒÐªº³Ì€j­È»P³Ì€p­Èinput_set_abs_params(nas_priv->input, ABS_HAT0Y, 0, 1023, 0, 0);//³]©wµŽ¹ï®yŒÐªº³Ì€j­È»P³Ì€p­Èprintk(" after input_set_abs_params/n");//sprintf(nas_priv->phys, "ts0");//nas_priv->input->private = nas_priv;//????nas_priv->input->name = "nastech_ts";nas_priv->input->phys = nas_priv->phys;nas_priv->input->id.bustype = BUS_I2C;nas_priv->input->id.vendor = 0x2011;nas_priv->input->id.product = 0x0800;//nas_priv->input->id.version = NASTECH_TS_VERSION;//=====================================================================================================================//if(input_register_device(nas_priv->input)) {printk(KERN_ERR"[%s - %d] input_register_device for auo-tp2 err!/n", __FUNCTION__, __LINE__);goto exit_kfree;}printk(" after input_register_device/n");nastech_i2c_continue_read(nas_priv->client,&value[0],8);printk(" after icontinue_read_device%x,/n",value[0]);// register the GPIO inerruptgpio_direction_input(TOUCH_INT_PIN);irq = gpio_to_irq(TOUCH_INT_PIN);nas_priv->local_irq = irq;set_irq_type(irq, IRQ_TYPE_EDGE_FALLING);if( request_irq(irq, nastech_ts_isr,IRQF_DISABLED|IRQF_TRIGGER_FALLING, "nastech_ts", (void *)nas_priv->input)){input_free_device(pInput_dev);goto exit_kfree;}enable_irq(&nas_priv->local_irq);return 0;exit_kfree:kfree(nas_priv->client);exit:destroy_workqueue (&nas_works);unregister_chrdev_region(MKDEV(NASTECH_TS_MAJOR, 0), 1);cdev_del(&nas_priv->cdev);kfree(nas_priv);return err;return err;}//static int multi_touch_xx_detach_client(struct i2c_client *client)static int __devexit multi_touch_xx_remove(struct i2c_client *client){struct multi_touch_xx_info *data = i2c_get_clientdata(client);kfree(data);dbg("no err, return /n");return 0;}uint32_t ssltsc_vbat(void){return 0;}static int __init multi_touch_xx_init(void){dbg("register the driver/n");dbg("init multi_touch_xx/n");printk("***********************/n");printk("**********multi_touch_xx_init*************/n");printk("***********************/n");return i2c_add_driver(&multi_touch_xx_driver);}static void __exit multi_touch_xx_exit(void){dbg("exit multi_touch_xx/n");i2c_del_driver(&multi_touch_xx_driver);}MODULE_AUTHOR("Maggie Qiu <[e-mail]>");MODULE_DESCRIPTION("I2C multi_touch_xx driver 

 

 

 

 

static const struct s35390a_platform_data multi_touch_xx ={ .irq1 = 1, .irq2 = gpio_to_irq(GPIO_NUM(0,29)),};static struct i2c_board_info __initdata _i2c[] ={ { I2C_BOARD_INFO("mma7455l", 0x1D), .platform_data = &mma7455l, }, { I2C_BOARD_INFO("multi_touch_xx", 0x60), .platform_data = &multi_touch_xx, },}; 

 

 

i2c_register_board_info(0, _i2c, ARRAY_SIZE(_i2c));