ov7725-driver.rar_ OV7725_OV7725_camera_ov7725 driver

/********************************* 版 权: 文 件 名:ov7725.c 作 者:狄兰兰 创建日期:20090213 版 本:02.00.01 功能描述:cmos图像传感器驱动程序， 完成VGA、QVGA、QQVGA、CIF、QCIF 修改历程:1、20090213 创建 *********************************/ #include <linux/string.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/config.h> #include <linux/errno.h> #include <linux/miscdevice.h> #include <linux/fcntl.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/proc_fs.h> #include <linux/workqueue.h> #include <linux/moduleparam.h> #include <asm/uaccess.h> #include <asm/system.h> #include <asm/io.h> #include "ov7725.h" #include "gpio_i2c.h" #define SCCB_OV7725_ADDR 0x42 /* * size = 0: VGA * size = 1: QVGA * size = 2: QQVGA * size = 3: CIF * size = 4: QCIF */ static int size = 0; /* set output drive capability * param:multi = 0/1/2/3 * return 0:set success, return 1:set error */ static unsigned int set_output_drivecap(unsigned char multi ) { switch(multi) { case 0: gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM2, 0x00); break; case 1: gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM2, 0x01); break; case 2: gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM2, 0x02); break; case 3: gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM2, 0x03); break; default: return 1; } return 0; } /* set output video data format * param: mode = 0/1/2/3/4 * return 0:set success, return 1:set error */ static unsigned int set_output_format(output_format form) { unsigned char regval; switch(form) { case YUV: gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM3, 0x10);//swap Y/UV output sequence gpio_i2c_write(SCCB_OV7725_ADDR, 0x66, 0x00); //U0Y0,V1Y1,U2Y2,V3Y3,.... regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x20); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval);//BT.656 protocol on,YUV output break; case GBR422: regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x02); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); break; case RGB565: regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x06); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); break; case RGB555: regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x0a); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); break; case RGB444: regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x0e); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); break; case PROBRAW: gpio_i2c_write(SCCB_OV7725_ADDR, 0x67, 0x4a);//DSP output RAW8 regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x01); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); break; case BRAW: gpio_i2c_write(SCCB_OV7725_ADDR, 0x67, 0x4a); regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x03); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); break; default: return 1; } return 0; } static void set_vga(void) { unsigned char regval; gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSTART, 0x22); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSIZE, 0xa4);//sensor size is larger than VGA gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSTART, 0x07); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSIZE, 0xf0); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HREF, 0x00); regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); CLEAR_BIT(regval, 0x40);//VGA gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HOUTSIZE, 0xa0); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VOUTSIZE, 0xf0); gpio_i2c_write(SCCB_OV7725_ADDR, DC_EXHCH, 0x00); // gpio_i2c_write(SCCB_OV7725_ADDR, DC_CLKRC, 0x01);//00/01/03/07 for 60/30/15/7.5fps } static void set_qvga(void) { unsigned char regval; gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSTART, 0x3f); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSIZE, 0x50); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSTART, 0x03); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSIZE, 0x78); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HREF, 0x00); regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x40); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HOUTSIZE, 0x50); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VOUTSIZE, 0x78); gpio_i2c_write(SCCB_OV7725_ADDR, DC_EXHCH, 0x00); // gpio_i2c_write(SCCB_OV7725_ADDR, DC_CLKRC, 0x01);//00/01/03/07 for 60/30/15/7.5fps } static void set_qqvga(void) { unsigned char regval; gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSTART, 0x3f); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSIZE, 0x50); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSTART, 0x03); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSIZE, 0x78); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HREF, 0x00); regval = gpio_sccb_read(SCCB_OV7725_ADDR, DC_COM7); SET_BIT(regval, 0x40); gpio_i2c_write(SCCB_OV7725_ADDR, DC_COM7, regval); // 1/2 down sampling gpio_i2c_write(SCCB_OV7725_ADDR, DC_SCAL0, HALF); gpio_i2c_write(SCCB_OV7725_ADDR, DC_SCAL1, 0x80); gpio_i2c_write(SCCB_OV7725_ADDR, DC_SCAL2, 0x80); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HOUTSIZE, 0x50); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VOUTSIZE, 0x78); gpio_i2c_write(SCCB_OV7725_ADDR, DC_EXHCH, 0x00); gpio_i2c_write(SCCB_OV7725_ADDR, 0x65, 0x2f);//vertical and horizontal zoom out enable // gpio_i2c_write(SCCB_OV7725_ADDR, DC_CLKRC, 0x01);//00/01/03/07 for 60/30/15/7.5fps } static void set_cif(void) { // unsigned char regval; gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSTART, 0x22); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSIZE, 0xa4); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSTART, 0x07); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSIZE, 0xf0); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HREF, 0x00); //sensor size is VGA gpio_i2c_write(SCCB_OV7725_ADDR, DC_HOUTSIZE, 0x5a); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VOUTSIZE, 0x90); gpio_i2c_write(SCCB_OV7725_ADDR, DC_EXHCH, 0x00); gpio_i2c_write(SCCB_OV7725_ADDR, 0x65, 0x2f);//vertical and horizontal zoom out enable // gpio_i2c_write(SCCB_OV7725_ADDR, DC_CLKRC, 0x01);//00/01/03/07 for 60/30/15/7.5fps } static void set_qcif(void) { // unsigned char regval; gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSTART, 0x22); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HSIZE, 0xa4); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSTART, 0x07); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VSIZE, 0xf0); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HREF, 0x00); // gpio_i2c_write(SCCB_OV7725_ADDR, DC_SCAL0, HALF); gpio_i2c_write(SCCB_OV7725_ADDR, DC_HOUTSIZE, 0x5a); gpio_i2c_write(SCCB_OV7725_ADDR, DC_VOUTSIZE, 0x90); gpio_i2c_write(SCCB_OV7725_ADDR, DC_EXHCH, 0x00); gpio_i2c_write(SCCB_OV7725_ADDR, 0x65, 0x2f);//vertical and horizontal zoom out enable // gpio_i2c_write(SCCB_OV7725_ADDR, DC_SCAL1, 0x80); // gpio_i2c_write(SCCB_OV7725_ADDR, DC_SCAL2, 0x80); // gpio_i2c_write(SCCB_OV7725_ADDR, DC_CLKRC, 0x01);//00/01/03/07 for 60/30/15/7.5fps } /* set luma * param: bri: 0x00 ~ 0xff */ static void set_bright(unsigned char bri) { gpio_i2c_write(SCCB_OV7725_ADDR, DC_SDE, 0x04); //contrast/bright enable gpio_i2c_write(SCCB_OV7725_ADDR, 0x9B, bri); } /* set contrast * param: con > 0x20, enhance Y con < 0x20, weaken Y */ static void set_contrast(unsigned char con) { gpio_i2c_