static void config_ppi(void)
{
bfin_write_PPI_DELAY(PPI_DELAY_VALUE);
bfin_write_PPI_COUNT(LCD_X_RES-1);
/* 0x10 -> PORT_CFG -> 2 or 3 frame syncs */
bfin_write_PPI_CONTROL((PPI_CONFIG_VALUE|0x10) & (~POLS));
}
static void config_ppi(void)
{
bfin_write_PPI_DELAY(PPI_DELAY_VALUE);
bfin_write_PPI_COUNT(LCD_X_RES-1);
bfin_write_PPI_CONTROL((PPI_CONFIG_VALUE|0x10) & (~POLS));
}
/*
* FUNCTION NAME: ppifcd_reg_reset
*
* INPUTS/OUTPUTS:
* in_idev - device number , other unavailable.
* VALUE RETURNED:
* void
*
* FUNCTION(S) CALLED:
*
* GLOBAL VARIABLES REFERENCED:
*
* GLOBAL VARIABLES MODIFIED: NIL
*
* DESCRIPTION: Reset PPI to initialization state.
*
* CAUTION:
*/
void ppifcd_reg_reset(ppi_device_t *pdev)
{
/* Do some initializaion stuff here based on the defined Camera Module
so we don't have to use ioctls */
bfin_clear_PPI_STATUS();
bfin_write_PPI_CONTROL(pdev->ppi_control & ~PORT_EN);
bfin_write_PPI_DELAY(pdev->ppi_delay);
bfin_write_PPI_COUNT(pdev->pixel_per_line - 1);
bfin_write_PPI_FRAME(pdev->lines_per_frame);
return;
}
static int ppi_init(void) {
/* Request peripheral pins for PPI */
peripheral_request_list(ppi_pins, DRIVER_NAME);
/* No delay between frame sync and read */
bfin_write_PPI_DELAY(0);
/* Read one sample per frame sync (the number given for COUNT is always one
less than the desired count) */
bfin_write_PPI_COUNT(3);
bfin_write_PPI_STATUS(0);
/* PPI control mode (assert on falling edge, 14 data bits, general purpose
rx with 1 frame sync */
bfin_write_PPI_CONTROL(PPI_MODE);
return 0;
}
/*
* FUNCTION NAME: ppi_ioctl
*
* INPUTS/OUTPUTS:
* in_inode - Description of openned file.
* in_filp - Description of openned file.
* in_cmd - Command passed into ioctl system call.
* in/out_arg - It is parameters which is specified by last command
*
* RETURN:
* 0 OK
* -EINVAL Invalid
*
* FUNCTION(S) CALLED:
*
* GLOBAL VARIABLES REFERENCED: ppiinfo
*
* GLOBAL VARIABLES MODIFIED: NIL
*
* DESCRIPTION:
*
* CAUTION:
*/
static int ppi_ioctl(struct inode *inode, struct file *filp, uint cmd,
unsigned long arg)
{
u_long value;
ppi_device_t *pdev = filp->private_data;
switch (cmd) {
case CMD_PPI_SET_PIXELS_PER_LINE:
{
pr_debug("ppi_ioctl: CMD_PPI_SET_PIXELS_PER_LINE\n");
pdev->pixel_per_line = (unsigned short)arg;
bfin_write_PPI_COUNT(pdev->pixel_per_line - 1);
break;
}
case CMD_PPI_SET_LINES_PER_FRAME:
{
pr_debug("ppi_ioctl: CMD_PPI_SET_LINES_PER_FRAME\n");
pdev->lines_per_frame = (unsigned short)arg;
bfin_write_PPI_FRAME(pdev->lines_per_frame);
break;
}
case CMD_PPI_SET_PPICONTROL_REG:
{
pr_debug("ppi_ioctl: CMD_PPI_SET_PPICONTROL_REG\n");
pdev->ppi_control = ((unsigned short)arg) & ~PORT_EN;
bfin_write_PPI_CONTROL(pdev->ppi_control);
break;
}
case CMD_PPI_SET_PPIDEALY_REG:
{
pr_debug("ppi_ioctl: CMD_PPI_SET_PPIDEALY_REG\n");
pdev->ppi_delay = (unsigned short)arg;
bfin_write_PPI_DELAY(pdev->ppi_delay);
break;
}
case CMD_SET_TRIGGER_GPIO:
{
pr_debug("ppi_ioctl: CMD_SET_TRIGGER_GPIO\n");
pdev->ppi_trigger_gpio = (unsigned short)arg;
if (pdev->ppi_trigger_gpio == NO_TRIGGER) {
break;
}
if (gpio_request(pdev->ppi_trigger_gpio, PPI_DEVNAME)) {
printk(KERN_ERR"Requesting GPIO %d faild\n",
pdev->ppi_trigger_gpio);
return -EFAULT;
}
gpio_direction_output(pdev->ppi_trigger_gpio, 0);
break;
}
case CMD_PPI_GET_ALLCONFIG:
{
break;
}
case CMD_PPI_GET_SYSTEMCLOCK:
{
value = get_sclk();
pr_debug
("ppi_ioctl: CMD_PPI_GET_SYSTEMCLOCK SCLK: %d \n",
(int)value);
copy_to_user((unsigned long *)arg, &value,
sizeof(unsigned long));
break;
}
default:
return -EINVAL;
}
return 0;
}
