708 lines
21 KiB
C
708 lines
21 KiB
C
#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/miscdevice.h>
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#include <linux/mutex.h>
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#include <linux/mm.h>
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#include <linux/types.h>
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/delay.h>
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#include <linux/sysctl.h>
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#include <asm/uaccess.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <linux/workqueue.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/uaccess.h>
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#define LCD_EXT_DEBUG_INFO
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#ifdef LCD_EXT_DEBUG_INFO
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#define DBG_PRINT(...) printk(__VA_ARGS__)
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#else
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#define DBG_PRINT(...)
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#endif
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#define DEVICE_NAME "lcd_vk2c21"
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/* ioctrl magic set */
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#define CH455_IOC_MAGIC 'h'
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#define IOCTL_CHAR_DISPLAY _IOWR(CH455_IOC_MAGIC, 0x10, unsigned char)
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#define IOCTL_DOT_DISPLAY _IOWR(CH455_IOC_MAGIC, 0x11, unsigned char)
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#define IOCTL_COLON_DISPLAY _IOWR(CH455_IOC_MAGIC, 0x12, unsigned char)
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#define IOCTL_PWR_DISPLAY _IOWR(CH455_IOC_MAGIC, 0x13, unsigned char)
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#define IOCTL_LAN_DISPLAY _IOWR(CH455_IOC_MAGIC, 0x14, unsigned char)
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#define IOCTL_LAN_OFF _IOWR(CH455_IOC_MAGIC, 0x15, unsigned char)
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#define IOCTL_WIFI_LOW_DISPLAY _IOWR(CH455_IOC_MAGIC, 0x16, unsigned char)
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#define IOCTL_WIFI_FINE_DISPLAY _IOWR(CH455_IOC_MAGIC, 0x17, unsigned char)
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#define IOCTL_WIFI_OFF _IOWR(CH455_IOC_MAGIC, 0x18, unsigned char)
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#define IOCTL_LED_ON _IOWR(CH455_IOC_MAGIC, 0x19, unsigned char)
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#define IOCTL_LED_OFF _IOWR(CH455_IOC_MAGIC, 0x1a, unsigned char)
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//以下管脚输出定义根据客户单片机做相应的修改
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#define Vk2c21_SCL_H() gpio_set_value(gpio_i2c_scl,1)
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#define Vk2c21_SCL_L() gpio_set_value(gpio_i2c_scl,0)
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#define Vk2c21_SDA_H() gpio_set_value(gpio_i2c_sda,1)
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#define Vk2c21_SDA_L() gpio_set_value(gpio_i2c_sda,0)
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#define Vk2c21_GET_SDA() gpio_get_value(gpio_i2c_sda)
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#define Vk2c21_SET_SDA_IN() gpio_direction_input(gpio_i2c_sda)
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#define Vk2c21_SET_SDA_OUT() gpio_direction_output(gpio_i2c_sda, 1)
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static int gpio_i2c_scl,gpio_i2c_sda;
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/**
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******************************************************************************
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* @file vk2c21.c
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* @author kevin_guo
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* @version V1.2
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* @date 05-17-2020
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* @brief This file contains all the vk2c21 functions.
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* 此文件适用于 VK2c21
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******************************************************************************
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* @attention
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******************************************************************************
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*/
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#include "lcd_vk2c21.h"
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#define VK2c21_CLK 100 //SCL信号线频率,由delay_nus实现 50->10kHz 10->50kHz 5->100kHz
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//驱动seg数
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//4com
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//VK2C21A/B/C/D
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#define Vk2c21_SEGNUM 13
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#define Vk2c21A_MAXSEGNUM 20
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#define Vk2c21B_MAXSEGNUM 16
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#define Vk2c21C_MAXSEGNUM 12
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#define Vk2c21D_MAXSEGNUM 8
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//segtab[]数组对应实际的芯片到LCD连线，连线见-VK2c21参考电路
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//4com
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//Vk2c21A
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unsigned char vk2c21_segtab[Vk2c21_SEGNUM]={
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18,17,16,15,14,13,12,11,10,
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9,8,7,6
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};
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//4com
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unsigned char vk2c21_dispram[Vk2c21_SEGNUM/2];//4COM时每个字节数据对应2个SEG
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//8com
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//unsigned char vk2c21_dispram[Vk2c21_SEGNUM];//8COM时每个字节数据对应1个SEG
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unsigned char shuzi_zimo[15]= //数字和字符字模
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{
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//0 1 2 3 4 5 6 7 8 9 - L o H i
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0xf5,0x05,0xb6,0x97,0x47,0xd3,0xf3,0x85,0xf7,0xd7,0x02,0x70,0x33,0x67,0x50
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};
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unsigned char vk2c21_segi,vk2c21_comi;
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unsigned char vk2c21_maxcom;//驱动的com数VK2C23A可以是4com或者8com
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unsigned char vk2c21_maxseg;//Vk2c21A=20 Vk2c21B=16 Vk2c21C=12 Vk2c21D=8
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/* Private function prototypes -----------------------------------------------*/
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unsigned char Vk2c21_InitSequence(void);
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/* Private function ----------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : delay_nus
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* Description : 延时1uS程序
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* Input : n->延时时间nuS
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* Output : None
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* Return : None
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*******************************************************************************/
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static void delay_nus(unsigned int n)
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{
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ndelay(n);
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}
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/*******************************************************************************
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* Function Name : I2CStart I2CStop I2CSlaveAck
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* I2CStart Description : 时钟线高时，数据线由高到低的跳变，表示I2C开始信号
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* I2CStop Description : 时钟线高时，数据线由低到高的跳变，表示I2C停止信号
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* I2CSlaveAck Description : I2C从机设备应答查询
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*******************************************************************************/
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static void Vk2c21_I2CStart( void )
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{
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Vk2c21_SCL_H();
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Vk2c21_SDA_H();
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delay_nus(VK2c21_CLK);
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Vk2c21_SDA_L();
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delay_nus(VK2c21_CLK);
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}
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static void Vk2c21_I2CStop( void )
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{
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Vk2c21_SCL_H();
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Vk2c21_SDA_L();
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delay_nus(VK2c21_CLK);
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Vk2c21_SDA_H();
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delay_nus(VK2c21_CLK);
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}
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static unsigned char Vk2c21_I2CSlaveAck( void )
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{
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unsigned int TimeOut;
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unsigned char RetValue;
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Vk2c21_SCL_L();
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//单片机SDA脚为单向IO要设为输入脚
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Vk2c21_SET_SDA_IN();
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delay_nus(VK2c21_CLK);
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Vk2c21_SCL_H();//第9个sclk上升沿
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TimeOut = 10000;
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while( TimeOut-- > 0 )
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{
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if( Vk2c21_GET_SDA()!=0 )//读取ack
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{
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RetValue = 1;
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}
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else
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{
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RetValue = 0;
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break;
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}
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}
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Vk2c21_SCL_L();
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//单片机SDA脚为单向IO要设为输出脚
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Vk2c21_SET_SDA_OUT();
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//printk("---%s----ret=%d------\n",__func__,RetValue);
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return RetValue;
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}
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/*******************************************************************************
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* Function Name : I2CWriteByte
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* Description : I2C写一字节命令,命令先送高位
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* Input : byte-要写入的数据
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* Output : None
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* Return : None
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*******************************************************************************/
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static void Vk2c21_I2CWriteByte( unsigned char byte )
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{
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unsigned char i=8;
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while (i--)
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{
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Vk2c21_SCL_L();
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if(byte&0x80)
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Vk2c21_SDA_H();
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else
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Vk2c21_SDA_L();
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byte<<=1;
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delay_nus(VK2c21_CLK);
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Vk2c21_SCL_H();
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delay_nus(VK2c21_CLK);
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}
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}
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/*************************************************************
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*函数名称: WriteCmdVk2c21
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*函数功能: 向Vk2C23写1个命令
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*输入参数: addr Dmod地址
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data 写入的数据
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*输出参数：SET: 写入正常；RESET:写入错误
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*备 注：
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**************************************************************/
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static unsigned char WriteCmdVk2c21(unsigned char cmd, unsigned char data )
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{
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Vk2c21_I2CStart();
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Vk2c21_I2CWriteByte( Vk2c21_ADDR|0x00 );
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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Vk2c21_I2CWriteByte( cmd );
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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Vk2c21_I2CWriteByte( data );
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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Vk2c21_I2CStop();
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return 0; //返回操作成败标志
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}
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/*******************************************************************************
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* Function Name : Write1Data
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* Description : 写1字节数据到显示RAM
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* Input : Addr-写入ram的地址
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* : Dat->写入ram的数据
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* Output : None
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* Return : 0-ok 1-fail
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*******************************************************************************/
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static unsigned char Write1DataVk2c21(unsigned char Addr,unsigned char Dat)
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{
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//START 信号
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Vk2c21_I2CStart();
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//SLAVE地址
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Vk2c21_I2CWriteByte(Vk2c21_ADDR);
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 1;
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}
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//写显示RAM命令
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Vk2c21_I2CWriteByte(Vk2c21_RWRAM);
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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//显示RAM地址
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Vk2c21_I2CWriteByte(Addr);
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 1;
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}
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//显示数据，1字节数据包含2个SEG
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Vk2c21_I2CWriteByte(Dat);
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if( Vk2c21_I2CSlaveAck()==1 )
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{
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Vk2c21_I2CStop();
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return 1;
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}
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//STOP信号
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Vk2c21_I2CStop();
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return 0;
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}
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/*******************************************************************************
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* Function Name : WritenData
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* Description : 写多个数据到显示RAM
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* Input : Addr-写入ram的起始地址
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* : Databuf->写入ram的数据buffer指针
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* : Cnt->写入ram的数据个数
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* Output : None
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* Return : 0-ok 1-fail
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*******************************************************************************/
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static unsigned char WritenDataVk2c21(unsigned char Addr,unsigned char *Databuf,unsigned char Cnt)
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{
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unsigned char n;
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//START信号
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Vk2c21_I2CStart();
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//SLAVE地址
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Vk2c21_I2CWriteByte(Vk2c21_ADDR);
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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//写显示RAM命令
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Vk2c21_I2CWriteByte(Vk2c21_RWRAM);
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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//显示RAM起始地址
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Vk2c21_I2CWriteByte(Addr);
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if( 1 == Vk2c21_I2CSlaveAck() )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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//发送Cnt个数据到显示RAM
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for(n=0;n<Cnt;n++)
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{
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Vk2c21_I2CWriteByte(*Databuf++);
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if( Vk2c21_I2CSlaveAck()==1 )
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{
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Vk2c21_I2CStop();
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return 0;
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}
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}
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//STOP信号
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Vk2c21_I2CStop();
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return 0;
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}
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/*******************************************************************************
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* Function Name : Vk2c21_DisAll
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* Description : 所有SEG显示同一个数据，bit7/bit3-COM3 bit6/bit2-COM2 bit5/bit1-COM1 bit4/bit0-COM0
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* : 例如：0xff全亮 0x00全灭 0x55灭亮灭亮 0xaa亮灭亮灭 0x33灭灭亮亮
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* Input ：dat->写入ram的数据(1个字节数据对应2个SEG)
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* Output : None
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* Return : None
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*******************************************************************************/
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static void Vk2c21_DisAll(unsigned char dat)
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{
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unsigned char segi;
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unsigned char dispram[16];
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if(vk2c21_maxcom==4)
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{
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for(segi=0;segi<10;segi++)
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{
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dispram[segi]=dat;
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}
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WritenDataVk2c21(0,dispram,10);//这里送8bit数据对应2个SEG，每8bit数据地址加1，每8位数据1个ACK
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}
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else
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{
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for(segi=0;segi<16;segi++)
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{
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dispram[segi]=dat;
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}
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WritenDataVk2c21(0,dispram,16);//这里送8bit数据对应1个SEG，每8bit数据地址加1，每8位数据1个ACK
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}
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}
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/*******************************************************************************
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* Function Name : DisSegComOn
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* Description : 点亮1个点(1个seg和1个com交叉对应的显示点)
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* Input ：seg->点对应的seg脚
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* ：com->点对应com脚
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* Output : None
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* Return : None
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*******************************************************************************/
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static void Vk2c21_DisSegComOn(unsigned char seg,unsigned char com)
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{
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if(vk2c21_maxcom==4)
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{
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if(seg%2==0)
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Write1DataVk2c21(seg/2,(1<<(com)));//这里送8位数据低4bit有效，每8bit数据地址加1，每8位数据1个ACK)
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else
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Write1DataVk2c21(seg/2,(1<<(4+com)));//这里送8位数据高4bit有效，每8bit数据地址加1，每8位数据1个ACK
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}
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else
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{
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Write1DataVk2c21(seg,(1<<(com)));//这里送8位数据低4bit有效，每8bit数据地址加1，每8位数据1个ACK
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}
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}
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/*******************************************************************************
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* Function Name : DisSegComOff
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* Description : 关闭1个点(1个seg和1个com交叉对应的显示点)
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* Input ：seg->点对应的seg脚
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* ：com->点对应com脚
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* Output : None
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* Return : None
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*******************************************************************************/
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static void Vk2c21_DisSegComOff(unsigned char seg,unsigned char com)
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{
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if(vk2c21_maxcom==4)
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{
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if(seg%2==0)
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Write1DataVk2c21(seg/2,~(1<<com));//这里送8位数据低4bit有效，每8bit数据地址加1，每8位数据1个ACK
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else
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Write1DataVk2c21(seg/2,~(1<<(4+com)));//这里送8位数据高4bit有效，每8bit数据地址加1，每8位数据1个ACK
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}
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else
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{
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Write1DataVk2c21(seg,~(1<<com));//这里送8位数据低4bit有效，每8bit数据地址加1，每8位数据1个ACK
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}
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}
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static void disp_3num(unsigned int dat)
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{
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unsigned dat8;
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if(vk2c21_maxcom==4)
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{
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dat8=dat/100%10; //显示百位
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vk2c21_dispram[0]&=0xf0;
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vk2c21_dispram[0]|=shuzi_zimo[dat8]&0x0f;
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vk2c21_dispram[0]&=0x8f;
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vk2c21_dispram[0]|=shuzi_zimo[dat8]&0xf0;
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dat8=dat/10%10; //显示十位
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vk2c21_dispram[1]&=0xf0;
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vk2c21_dispram[1]|=shuzi_zimo[dat8]&0x0f;
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vk2c21_dispram[1]&=0x8f;
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vk2c21_dispram[1]|=shuzi_zimo[dat8]&0xf0;
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dat8=dat%10; //显示个位
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vk2c21_dispram[2]&=0xf0;
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vk2c21_dispram[2]|=shuzi_zimo[dat8]&0x0f;
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vk2c21_dispram[2]&=0x8f;
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vk2c21_dispram[2]|=shuzi_zimo[dat8]&0xf0;
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if(dat<100) //数字小于100，百位不显示
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{
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vk2c21_dispram[0]&=0xf0;
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vk2c21_dispram[0]&=0x8f;
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}
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if(dat<10) //数字小于10，十位不显示
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{
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vk2c21_dispram[1]&=0xf0;
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vk2c21_dispram[1]&=0x8f;
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}
|
||
//SEG不连续1个1个数据送
|
||
Write1DataVk2c21(vk2c21_segtab[2]/2,vk2c21_dispram[0]);
|
||
Write1DataVk2c21(vk2c21_segtab[4]/2,vk2c21_dispram[1]);
|
||
Write1DataVk2c21(vk2c21_segtab[6]/2,vk2c21_dispram[2]);
|
||
Write1DataVk2c21(vk2c21_segtab[8]/2,vk2c21_dispram[0]);
|
||
Write1DataVk2c21(vk2c21_segtab[10]/2,vk2c21_dispram[1]);
|
||
Write1DataVk2c21(vk2c21_segtab[12]/2,vk2c21_dispram[2]);
|
||
//SEG连续送多个数据
|
||
}
|
||
else
|
||
{
|
||
dat8=dat/100%10; //显示百位
|
||
vk2c21_dispram[8]&=0x80;
|
||
vk2c21_dispram[8]|=shuzi_zimo[dat8];
|
||
|
||
dat8=dat/10%10; //显示十位
|
||
vk2c21_dispram[9]&=0x80;
|
||
vk2c21_dispram[9]|=shuzi_zimo[dat8];
|
||
|
||
dat8=dat%10; //显示个位
|
||
vk2c21_dispram[15]&=0x80;
|
||
vk2c21_dispram[15]|=shuzi_zimo[dat8];
|
||
|
||
if(dat<100) //数字小于100，百位不显示
|
||
{
|
||
vk2c21_dispram[8]&=0x80;
|
||
}
|
||
if(dat<10) //数字小于10，十位不显示
|
||
{
|
||
vk2c21_dispram[9]&=0x80;
|
||
}
|
||
//SEG不连续1个1个数据送
|
||
Write1DataVk2c21(8,vk2c21_dispram[8]);
|
||
Write1DataVk2c21(9,vk2c21_dispram[9]);
|
||
Write1DataVk2c21(15,vk2c21_dispram[15]);
|
||
//SEG连续送多个数据
|
||
}
|
||
}
|
||
|
||
/*******************************************************************************
|
||
* Function Name : Init
|
||
* Description : 初始化配置
|
||
* Input ：None
|
||
* Output : None
|
||
* Return : None
|
||
*******************************************************************************/
|
||
static int Vk2c21_Init(void)
|
||
{
|
||
int ret=0;
|
||
WriteCmdVk2c21(Vk2c21_MODESET,CCOM_1_3__4); //模式设置 1/3 Bais 1/4 Duty
|
||
//WriteCmdVk2c21(Vk2c21_MODESET,CCOM_1_4__4); //模式设置 1/4 Bais 1/4 Duty
|
||
vk2c21_maxcom=4;
|
||
vk2c21_maxseg=Vk2c21A_MAXSEGNUM;//Vk2c21A=20 Vk2c21B=16 Vk2c21C=12 Vk2c21D=8
|
||
// WriteCmdVk2c21(Vk2c21_MODESET,CCOM_1_3__8); //模式设置 1/3 Bais 1/8 Duty
|
||
// WriteCmdVk2c21(Vk2c21_MODESET,CCOM_1_4__8); //模式设置 1/4 Bais 1/8 Duty
|
||
// vk2c21_maxcom=8;
|
||
// vk2c21_maxseg=Vk2c21A_MAXSEGNUM;//Vk2c21A=16 Vk2c21B=12 Vk2c21C=8 Vk2c21D=4
|
||
WriteCmdVk2c21(Vk2c21_SYSSET,SYSON_LCDON); //内部系统振荡器开，lcd开显示
|
||
WriteCmdVk2c21(Vk2c21_FRAMESET,FRAME_80HZ); //帧频率80Hz
|
||
// WriteCmdVk2c21(Vk2c21_FRAMESET,FRAME_160HZ);//帧频率160Hz
|
||
WriteCmdVk2c21(Vk2c21_BLINKSET,BLINK_OFF); //闪烁关闭
|
||
// WriteCmdVk2c21(Vk2c21_BLINKSET,BLINK_2HZ); //闪烁2HZ
|
||
// WriteCmdVk2c21(Vk2c21_BLINKSET,BLINK_1HZ); //闪烁1HZ
|
||
// WriteCmdVk2c21(Vk2c21_BLINKSET,BLINK_0D5HZ); //闪烁0.5HZ
|
||
//SEG/VLCD共用脚设为VLCD，内部电压调整功能关闭,VLCD和VDD短接VR=0偏置电压=VDD
|
||
//WriteCmdVk2c21(Vk2c21_IVASET,VLCDSEL_IVAOFF_R0);
|
||
//SEG/VLCD共用脚设为VLCD，内部电压调整功能关闭,VLCD和VDD串接电阻VR>0偏置电压=VLCD
|
||
WriteCmdVk2c21(Vk2c21_IVASET,VLCDSEL_IVAOFF_R1);
|
||
//SEG/VLCD共用脚设为SEG，内部偏置电压调整：1/3bias=0.652VDD 1/4bias=0.714VDD
|
||
//WriteCmdVk2c21(Vk2c21_IVASET,SEGSEL_IVA02H);
|
||
|
||
//test
|
||
Vk2c21_DisAll(0x00);
|
||
disp_3num(456);
|
||
//Vk2c21_DisAll(0xff); //LCD全显
|
||
//disp_3num(1234);
|
||
return ret;
|
||
}
|
||
|
||
static int Vk2c21_open(struct inode *inode, struct file *file)
|
||
{
|
||
int ret;
|
||
ret = nonseekable_open(inode, file);
|
||
if(ret < 0)
|
||
return ret;
|
||
return 0;
|
||
}
|
||
|
||
static int Vk2c21_release(struct inode *inode, struct file *file)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
static long Vk2c21_ioctl(struct file *file, unsigned int cmd, unsigned long args)
|
||
{
|
||
int ret = 0 , i=0,pos_temp=0;
|
||
void __user *argp = (void __user *)args;
|
||
unsigned char display_arg[6]={0};
|
||
switch (cmd){
|
||
case IOCTL_CHAR_DISPLAY:
|
||
if (args) {
|
||
ret = copy_from_user(display_arg, argp,sizeof(display_arg)/sizeof(display_arg[0]));
|
||
}
|
||
for(i=0;i<6;i++)
|
||
{
|
||
if(display_arg[i] <= '9' && display_arg[i] >= '0')
|
||
{
|
||
pos_temp = display_arg[i] - '0';
|
||
vk2c21_dispram[i]&=0xf0;
|
||
vk2c21_dispram[i]|=shuzi_zimo[pos_temp]&0x0f;
|
||
vk2c21_dispram[i]&=0x8f;
|
||
vk2c21_dispram[i]|=shuzi_zimo[pos_temp]&0xf0;
|
||
Write1DataVk2c21(vk2c21_segtab[2*i+2]/2,vk2c21_dispram[i]);
|
||
}else if(display_arg[i] <= 'z' && display_arg[i] >= 'a'){
|
||
}else if(display_arg[i] <= 'Z' && display_arg[i] >= 'A'){
|
||
}
|
||
}
|
||
break;
|
||
case IOCTL_DOT_DISPLAY:
|
||
break;
|
||
case IOCTL_COLON_DISPLAY:
|
||
break;
|
||
case IOCTL_PWR_DISPLAY:
|
||
break;
|
||
case IOCTL_LAN_DISPLAY:
|
||
Vk2c21_DisSegComOn(vk2c21_segtab[6],0x1);
|
||
break;
|
||
case IOCTL_LAN_OFF:
|
||
Vk2c21_DisSegComOff(vk2c21_segtab[6],0x1);
|
||
break;
|
||
case IOCTL_WIFI_LOW_DISPLAY:
|
||
break;
|
||
case IOCTL_WIFI_FINE_DISPLAY:
|
||
break;
|
||
case IOCTL_WIFI_OFF:
|
||
break;
|
||
case IOCTL_LED_ON:
|
||
Vk2c21_DisAll(0xff); //LCD全显
|
||
break;
|
||
case IOCTL_LED_OFF:
|
||
Vk2c21_DisAll(0x00); //LCD全关
|
||
break;
|
||
default:
|
||
printk("ERROR: IOCTL CMD NOT FOUND!!!\n");
|
||
break;
|
||
}
|
||
return 0;
|
||
}
|
||
static struct file_operations Vk2c21_fops ={
|
||
.owner =THIS_MODULE,
|
||
.open =Vk2c21_open,
|
||
.release =Vk2c21_release,
|
||
.unlocked_ioctl =Vk2c21_ioctl,
|
||
};
|
||
|
||
|
||
|
||
static int Vk2c21_probe(struct platform_device *pdev)
|
||
{
|
||
static struct class * scull_class;
|
||
struct device_node *node = pdev->dev.of_node;
|
||
enum of_gpio_flags flags;
|
||
int ret;
|
||
|
||
ret =register_chrdev(0,DEVICE_NAME,&Vk2c21_fops);
|
||
if(ret<0){
|
||
printk("can't register device lcd_vk2c21.\n");
|
||
return ret;
|
||
}
|
||
printk("register device lcd_vk2c21 success.\n");
|
||
|
||
scull_class = class_create(THIS_MODULE,DEVICE_NAME);
|
||
if(IS_ERR(scull_class))
|
||
{
|
||
printk(KERN_ALERT "Err:faile in scull_class!\n");
|
||
return -1;
|
||
}
|
||
device_create(scull_class, NULL, MKDEV(ret,0), NULL, DEVICE_NAME);
|
||
|
||
|
||
//---------------------------
|
||
gpio_i2c_scl = of_get_named_gpio_flags(node, "i2c_scl", 0, &flags);
|
||
if (gpio_is_valid(gpio_i2c_scl)){
|
||
if (gpio_request(gpio_i2c_scl, "i2c_scl_gpio")<0) {
|
||
printk("%s: failed to get gpio_i2c_scl.\n", __func__);
|
||
return -1;
|
||
}
|
||
gpio_direction_output(gpio_i2c_scl, 1);
|
||
printk("%s: get property: gpio,i2c_scl = %d\n", __func__, gpio_i2c_scl);
|
||
}else{
|
||
printk("get property gpio,i2c vk2c21 failed \n");
|
||
return -1;
|
||
}
|
||
|
||
gpio_i2c_sda = of_get_named_gpio_flags(node, "i2c_sda", 0, &flags);
|
||
|
||
if (gpio_is_valid(gpio_i2c_sda)){
|
||
if (gpio_request(gpio_i2c_sda, "i2c_sda_gpio")<0) {
|
||
printk("%s: failed to get gpio_i2c_sda.\n", __func__);
|
||
return -1;
|
||
}
|
||
gpio_direction_output(gpio_i2c_sda, 1);
|
||
printk("%s: get property: gpio,i2c_sda = %d\n", __func__, gpio_i2c_sda);
|
||
}else{
|
||
printk("get property gpio,i2c vk2c21 failed \n");
|
||
return -1;
|
||
}
|
||
|
||
printk("==========%s probe ok========\n", DEVICE_NAME);
|
||
|
||
ret = Vk2c21_Init();
|
||
if(ret < 0)
|
||
return -1;
|
||
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int Vk2c21_remove(struct platform_device *pdev)
|
||
{
|
||
unregister_chrdev(0,DEVICE_NAME);
|
||
return 0;
|
||
}
|
||
|
||
|
||
static void Vk2c21_shutdown (struct platform_device *pdev)
|
||
{
|
||
WriteCmdVk2c21(Vk2c21_SYSSET,SYSOFF_LCDOFF);
|
||
}
|
||
|
||
#ifdef CONFIG_OF
|
||
static const struct of_device_id Vk2c21_dt_match[]={
|
||
{ .compatible = "lcd_vk2c21",},
|
||
{}
|
||
};
|
||
MODULE_DEVICE_TABLE(of, Vk2c21_dt_match);
|
||
#endif
|
||
|
||
static struct platform_driver Vk2c21_driver = {
|
||
.probe = Vk2c21_probe,
|
||
.remove = Vk2c21_remove,
|
||
.shutdown = Vk2c21_shutdown,
|
||
.driver = {
|
||
.name = DEVICE_NAME,
|
||
.owner = THIS_MODULE,
|
||
#ifdef CONFIG_OF
|
||
.of_match_table = of_match_ptr(Vk2c21_dt_match),
|
||
#endif
|
||
},
|
||
};
|
||
|
||
|
||
static int __init led_vk2c21_init(void)
|
||
{
|
||
int ret;
|
||
DBG_PRINT("%s\n=============================================\n", __FUNCTION__);
|
||
ret = platform_driver_register(&Vk2c21_driver);
|
||
if (ret) {
|
||
printk("[error] %s failed to register vk2c21 driver module\n", __FUNCTION__);
|
||
return -ENODEV;
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
static void __exit led_vk2c21_exit(void)
|
||
{
|
||
platform_driver_unregister(&Vk2c21_driver);
|
||
}
|
||
|
||
module_init(led_vk2c21_init);
|
||
module_exit(led_vk2c21_exit);
|
||
|
||
MODULE_AUTHOR("Hugsun");
|
||
MODULE_DESCRIPTION("LCD Extern driver for lcd_vk2c21");
|
||
MODULE_LICENSE("GPL");
|