static void configure_gpios(spi_dev *dev, bool as_master) {
const struct spi_pins *pins = dev_to_spi_pins(dev);
if (!pins) {
return;
}
const stm32_pin_info *nssi = &PIN_MAP[pins->nss];
const stm32_pin_info *scki = &PIN_MAP[pins->sck];
const stm32_pin_info *misoi = &PIN_MAP[pins->miso];
const stm32_pin_info *mosii = &PIN_MAP[pins->mosi];
disable_pwm(nssi);
disable_pwm(scki);
disable_pwm(misoi);
disable_pwm(mosii);
spi_gpio_cfg(as_master,
nssi->gpio_device,
nssi->gpio_bit,
scki->gpio_device,
scki->gpio_bit,
misoi->gpio_bit,
mosii->gpio_bit);
}
static void
spi_config_gpio(struct s3c2410_spi *device)
{
uintptr_t ms, p_ms;
(void)device;
/* XXX what to do if fail? -gl */
if (gpio_base == NULL)
{
ms = memsection_create_user(0x1000, &p_ms);
hardware_back_memsection(ms, S3C2410_GPIO_PHYS, L4_IOMemory);
gpio_base = (uint32_t *)p_ms;
}
// Turn on the backlight
spi_gpio_cfg(gpio_base, S3C2410_GPB0, 0x01);
spi_gpio_set(gpio_base, S3C2410_GPB0, 1);
// But not the vibrator!
// spi_gpio_cfg(gpio_base, S3C2410_GPB3, S3C2410_GPG3_OUTPUT);
// spi_gpio_set(gpio_base, S3C2410_GPB3, 1);
/* Put the MOSI/MISO pins in a known-state */
spi_gpio_cfg(gpio_base, S3C2410_GPG6, S3C2410_GPG6_OUTPUT);
spi_gpio_cfg(gpio_base, S3C2410_GPG7, S3C2410_GPG7_OUTPUT);
spi_gpio_set(gpio_base, S3C2410_GPG6, 1);
spi_gpio_set(gpio_base, S3C2410_GPG7, 1);
/* disable CS */
spi_gpio_cfg(gpio_base, S3C2410_GPG3, S3C2410_GPG3_OUTPUT);
spi_gpio_set(gpio_base, S3C2410_GPG3, 1);
/*
* Set the GPIO pins to functional mode, i.e. we will use
* SPI as a UART instead of bit-banging - nt
*/
spi_gpio_cfg(gpio_base, S3C2410_GPG5, S3C2410_GPG5_SPIMISO1);
spi_gpio_cfg(gpio_base, S3C2410_GPG6, S3C2410_GPG6_SPIMOSI1);
spi_gpio_cfg(gpio_base, S3C2410_GPG7, S3C2410_GPG7_SPICLK1);
/*
* conf pull-up register
* get LCM out of reset
*
* nt - don't worry, this is done by u-boot
*/
return;
}
