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#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <mach/adc.h>
#include <mach/hardware.h>
#include <asm/io.h>
#include <linux/gpio.h>
#define SPRD_RF_INSIDE ("V1.0.0")
#define SPRD_RF_2IN1 ("V1.0.2")
#define SPRD_RF_3IN1 ("V1.0.4")
#define SPRD_RF_NO_MACH ("No match board")
#ifdef CONFIG_SPRD_BOARD_TYPE_GPIO
#define SPRD_BOARD_TYPE_GPIO_1 (92)
#define SPRD_BOARD_TYPE_GPIO_2 (93)
#endif
struct sprdboard_auxadc_cal {
uint16_t p0_vol; //4.2V
uint16_t p0_adc;
uint16_t p1_vol; //3.6V
uint16_t p1_adc;
uint16_t cal_type;
};
static struct sprdboard_auxadc_cal board_adc_cal = {
4200, 3310,
3600, 2832,
0,
};
static int board_type_open(struct inode *inode, struct file *file)
{
return 0;
}
static int board_type_release(struct inode *inode, struct file *filp)
{
return 0;
}
static int __init sprd_adc_cal_start(char *str)
{
unsigned int adc_data[2] = { 0 };
char *cali_data = &str[1];
if (str) {
printk("adc_cal%s!\n", str);
sscanf(cali_data, "%d,%d", &adc_data[0], &adc_data[1]);
printk("adc_data: 0x%x 0x%x!\n", adc_data[0], adc_data[1]);
board_adc_cal.p0_vol = adc_data[0] & 0xffff;
board_adc_cal.p0_adc = (adc_data[0] >> 16) & 0xffff;
board_adc_cal.p1_vol = adc_data[1] & 0xffff;
board_adc_cal.p1_adc = (adc_data[1] >> 16) & 0xffff;
printk("auxadc cal from cmdline ok!!! adc_data[0]: 0x%x, adc_data[1]:0x%x\n",adc_data[0], adc_data[1]);
}
return 1;
}
__setup("sprd_adc_cal", sprd_adc_cal_start);
static uint16_t sprd_adc_to_vol(uint16_t adcvalue)
{
int32_t temp;
temp = board_adc_cal.p0_vol - board_adc_cal.p1_vol;
temp = temp * (adcvalue - board_adc_cal.p0_adc);
temp = temp / (board_adc_cal.p0_adc - board_adc_cal.p1_adc);
temp = temp + board_adc_cal.p0_vol;
return temp;
}
static uint16_t sprd_vol_to_channel_vol(uint16_t adcvalue,uint16_t channel)
{
uint32_t result;
uint32_t channel_vol = sprd_adc_to_vol(adcvalue);
uint32_t m, n;
uint32_t bat_numerators, bat_denominators;
uint32_t adc_channel_numerators, adc_channel_denominators;
sci_adc_get_vol_ratio(ADC_CHANNEL_VBAT, 0, &bat_numerators,
&bat_denominators);
sci_adc_get_vol_ratio(channel, 0, &adc_channel_numerators,
&adc_channel_denominators);
///v1 = vbat_vol*0.268 = vol_bat_m * r2 /(r1+r2)
n = bat_denominators * adc_channel_numerators;
m = channel_vol * bat_numerators * (adc_channel_denominators);
//result = (m + n / 2) / n;
result = m / n;
return result;
}
#ifdef CONFIG_SPRD_BOARD_TYPE_GPIO
static void get_board_type_by_gpio(char *buf_version)
{
int ret;
ret = gpio_request (SPRD_BOARD_TYPE_GPIO_1, "board_type_gpio_1");
if (ret){
printk ("board_type_gpio_1 err: %d\n", SPRD_BOARD_TYPE_GPIO_1);
}
ret = gpio_request (SPRD_BOARD_TYPE_GPIO_2, "board_type_gpio_1");
if (ret){
printk ("board_type_gpio_2 err: %d\n", SPRD_BOARD_TYPE_GPIO_2);
}
gpio_direction_input(SPRD_BOARD_TYPE_GPIO_1);
gpio_direction_input(SPRD_BOARD_TYPE_GPIO_2);
if((gpio_get_value(SPRD_BOARD_TYPE_GPIO_1) == 1) && (gpio_get_value(SPRD_BOARD_TYPE_GPIO_2) == 1))
strcpy(buf_version,SPRD_RF_INSIDE);
else if((gpio_get_value(SPRD_BOARD_TYPE_GPIO_1) == 0) && (gpio_get_value(SPRD_BOARD_TYPE_GPIO_2) == 1))
strcpy(buf_version,SPRD_RF_2IN1);//2in1
else if((gpio_get_value(SPRD_BOARD_TYPE_GPIO_1) == 1) && (gpio_get_value(SPRD_BOARD_TYPE_GPIO_2) == 0))
strcpy(buf_version,SPRD_RF_3IN1);//3in1
else
strcpy(buf_version,SPRD_RF_NO_MACH);
gpio_free(SPRD_BOARD_TYPE_GPIO_1);
gpio_free(SPRD_BOARD_TYPE_GPIO_2);
}
#endif
ssize_t board_type_read(struct file *file, char __user *buf,
size_t count, loff_t *offset)
{
char buf_version[20] = {0};
u32 buf_len;
#ifdef CONFIG_SPRD_BOARD_TYPE_GPIO
get_board_type_by_gpio(buf_version);
#else
int adc_value;
uint16_t vol;//mv
#ifdef CONFIG_ARCH_SCX15
adc_value = sci_adc_get_value_by_isen(ADC_CHANNEL_0,0,40); //set current to 40 uA
vol = sprd_vol_to_channel_vol(adc_value,ADC_CHANNEL_0);
//printk("10 adc_value:%d,vol:%d\n", adc_value,vol);
if(vol >= 1000)
strcpy(buf_version,SPRD_RF_INSIDE);
else if(vol >600 && vol <= 1000)
strcpy(buf_version,SPRD_RF_3IN1); //3in1
else if(vol >200 && vol <=600)
strcpy(buf_version,SPRD_RF_2IN1);//2in1
else
strcpy(buf_version,SPRD_RF_NO_MACH);
#else
//adc_value = sci_adc_get_value(ADC_CHANNEL_1, 0);
adc_value = sci_adc_get_value_by_isen(ADC_CHANNEL_1,0,40); //set current to 40 uA
vol = sprd_vol_to_channel_vol(adc_value,ADC_CHANNEL_1);
//printk("10 adc_value:%d,vol:%d\n", adc_value,vol);
if(vol >= 1100)
strcpy(buf_version,SPRD_RF_INSIDE);
else if(vol >700 && vol <= 900)
strcpy(buf_version,SPRD_RF_2IN1);//2in1
else if(vol >300 && vol <=500)
strcpy(buf_version,SPRD_RF_3IN1);//3in1
else
strcpy(buf_version,SPRD_RF_NO_MACH);
#endif
#endif
buf_len = strlen(buf_version);
printk("version:%s\n",buf_version);
if(copy_to_user(buf, buf_version, buf_len))
return -EFAULT;
return buf_len;
}
int sprd_kernel_get_board_type(char *buf,int read_len)
{
char buf_version[20] = {0};
u32 buf_len;
#ifdef CONFIG_SPRD_BOARD_TYPE_GPIO
get_board_type_by_gpio(buf_version);
#else
int adc_value;
uint16_t vol;//mv
#ifdef CONFIG_ARCH_SCX15
adc_value = sci_adc_get_value_by_isen(ADC_CHANNEL_0,0,40); //set current to 40 uA
vol = sprd_vol_to_channel_vol(adc_value,ADC_CHANNEL_0);
//printk("10 adc_value:%d,vol:%d\n", adc_value,vol);
if(vol >= 1000)
strcpy(buf_version,SPRD_RF_INSIDE);
else if(vol >600 && vol <= 1000)
strcpy(buf_version,SPRD_RF_3IN1); //3in1
else if(vol >200 && vol <=600)
strcpy(buf_version,SPRD_RF_2IN1);//2in1
else
strcpy(buf_version,SPRD_RF_NO_MACH);
#else
adc_value = sci_adc_get_value_by_isen(ADC_CHANNEL_1,0,40); //set current to 40 uA
vol = sprd_vol_to_channel_vol(adc_value,ADC_CHANNEL_1);
//printk("10 adc_value:%d,vol:%d\n", adc_value,vol);
if(vol >= 1100)
strcpy(buf_version,SPRD_RF_INSIDE);
else if(vol >700 && vol <= 900)
strcpy(buf_version,SPRD_RF_2IN1);//2in1
else if(vol >300 && vol <=500)
strcpy(buf_version,SPRD_RF_3IN1);//3in1
else
strcpy(buf_version,SPRD_RF_NO_MACH);
#endif
#endif
buf_len = strlen(buf_version);
printk("version:%s\n",buf_version);
if(read_len >= buf_len)
strncpy(buf,buf_version,buf_len);
return buf_len;
}
EXPORT_SYMBOL_GPL(sprd_kernel_get_board_type);
static const struct file_operations sprd_board_type_fops = {
.open = board_type_open,
.read = board_type_read,
.release = board_type_release,
.owner = THIS_MODULE,
};
static struct miscdevice sprd_board_type_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "board_type",
.fops = &sprd_board_type_fops
};
static int sprd_board_type_init(void)
{
return misc_register(&sprd_board_type_dev);
}
static void __exit sprd_board_type_exit(void)
{
misc_deregister(&sprd_board_type_dev);
}
module_init(sprd_board_type_init);
module_exit(sprd_board_type_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Driver for get board type");
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