static int setup_tx(int new_out_pin)
{
int ret;
user_gpio_set_t* pinstate;
struct sunxi_gpio_chip* sgpio = container_of(gpiochip,struct sunxi_gpio_chip,chip);
dprintk("addresses: gpiochip: %lx, sgpio: %lx",(unsigned long int) gpiochip,(unsigned long int) sgpio);
if (gpio_out_pin==new_out_pin)
return 0; //do not set up, pin not changed
if (gpio_out_pin!=0) { //we had tx pin setup. Free it so others can use it!
dprintk(": trying to free old out pin index %d: %s\n",gpio_out_pin,gpiochip->names[TX_OFFSET_GPIOCHIP]);
gpio_free(gpio_out_pin);
}
gpio_out_pin=new_out_pin;
if (gpio_out_pin==0) {
return 0; // do not set up, TX disabled
}
dprintk(": trying to claim new out pin index %d: %s\n",gpio_out_pin,gpiochip->names[TX_OFFSET_GPIOCHIP]);
ret = gpio_request(gpio_out_pin,LIRC_DRIVER_NAME "ir/out");
if (ret){
printk(KERN_ALERT LIRC_DRIVER_NAME
": cant claim gpio pin %d with code %d\n", gpio_out_pin,ret);
ret = -ENODEV;
goto exit_disable_tx;
}
gpiochip->direction_output(gpiochip, TX_OFFSET_GPIOCHIP, 1);
gpiochip->set(gpiochip, TX_OFFSET_GPIOCHIP, invert);
pinstate=kzalloc(sizeof(user_gpio_set_t),GFP_KERNEL);
//dprintk("pin:address %lx, pin_name: %s, pin handler: %d",(unsigned long int) &(sgpio->data[TX_OFFSET_GPIOCHIP]),
// sgpio->data[TX_OFFSET_GPIOCHIP].pin_name,sgpio->data[TX_OFFSET_GPIOCHIP].gpio_handler);
ret=gpio_get_one_pin_status(sgpio->data[TX_OFFSET_GPIOCHIP].gpio_handler, pinstate, sgpio->data[TX_OFFSET_GPIOCHIP].pin_name, true);
if(pinstate && !ret) {
pr_info("Maximum load on '%s' is %d mA\n", gpiochip->names[TX_OFFSET_GPIOCHIP], 10+10*pinstate->drv_level);
kfree(pinstate);
}
else
printk(KERN_ALERT LIRC_DRIVER_NAME ": something might have gone wrong, return from pin status query: %d",ret);
return 0; // successfully set up
exit_disable_tx:
// cannot claim new pin
gpio_out_pin = 0; // disable tx
return ret;
}
int get_gpio_member_value( u32 gpio_hd , char *name , int member_name )
{
user_gpio_set_t gpio_info[1];
int ret;
GPIO_SW_DEBUG("fetch gpio_hd is %x \n",gpio_hd);
GPIO_SW_DEBUG("fetch name is %s \n",name);
ret = gpio_get_one_pin_status(gpio_hd, gpio_info, name, 1);
if(ret < 0){
GPIO_SW_DEBUG("fetch gpio infomation fail \n");
}
else{
GPIO_SW_DEBUG("fetch gpio infomation ok \n");
}
GPIO_SW_DEBUG("fetch ret0 is %d \n",ret);
switch ( member_name )
{
case mul_sel_1:
ret = gpio_info->mul_sel;
break;
case pull_2:
ret = gpio_info->pull;
break;
case drv_level_3:
ret = gpio_info->drv_level;
break;
case data_4:
ret = gpio_info->data;
break;
case port_5:
ret = gpio_info->port;
break;
case port_num_6:
ret = gpio_info->port_num;
break;
}
return ret;
}