static void *get_spd_pointer(char *spd_file_content, int total_spds, int *dual)
{
int ram_id = 0;
/* The ram_id[2:0] pullups on ninja are too large for the default 20K
* pulldown on the pad. Therefore, disable the internal pull resistor to
* read high values correctly. */
ssus_disable_internal_pull(GPIO_SSUS_37_PAD);
ssus_disable_internal_pull(GPIO_SSUS_38_PAD);
ssus_disable_internal_pull(GPIO_SSUS_39_PAD);
ram_id |= (ssus_get_gpio(GPIO_SSUS_37_PAD) << 0);
ram_id |= (ssus_get_gpio(GPIO_SSUS_38_PAD) << 1);
ram_id |= (ssus_get_gpio(GPIO_SSUS_39_PAD) << 2);
printk(BIOS_DEBUG, "ram_id=%d, total_spds: %d\n", ram_id, total_spds);
if (ram_id >= total_spds)
return NULL;
/* Single channel configs */
if (dual_channel_config & (1 << ram_id))
*dual = 1;
return &spd_file_content[SPD_SIZE * ram_id];
}
static void *get_spd_pointer(char *spd_file_content, int total_spds, int *dual)
{
int ram_id = 0;
/* The ram_id[2:0] pullups are too large for the default 20K
* pulldown on the pad. Therefore, disable the internal pull resistor to
* read high values correctly. */
ssus_disable_internal_pull(GPIO_SSUS_37_PAD);
ssus_disable_internal_pull(GPIO_SSUS_38_PAD);
ssus_disable_internal_pull(GPIO_SSUS_39_PAD);
#ifdef GPIO_SSUS_40_PAD_USE_PULLDOWN
/* To prevent floating pin on shipped systems. */
ssus_enable_internal_pull(GPIO_SSUS_40_PAD, PAD_PULL_DOWN | PAD_PU_20K);
#elif defined(GPIO_SSUS_40_PAD)
ssus_disable_internal_pull(GPIO_SSUS_40_PAD);
#endif
ram_id |= (ssus_get_gpio(GPIO_SSUS_37_PAD) << 0);
ram_id |= (ssus_get_gpio(GPIO_SSUS_38_PAD) << 1);
ram_id |= (ssus_get_gpio(GPIO_SSUS_39_PAD) << 2);
#ifdef GPIO_SSUS_40_PAD
ram_id |= (ssus_get_gpio(GPIO_SSUS_40_PAD) << 3);
#endif
printk(BIOS_DEBUG, "ram_id=%d, total_spds: %d\n", ram_id, total_spds);
if (ram_id >= total_spds)
return NULL;
/* Single channel configs */
if (dual_channel_config & (1 << ram_id))
*dual = 1;
return &spd_file_content[SPD_SIZE * ram_id];
}
/** \brief returns the input / output value from an SSUS GPIO
*
* @param gpio_num The GPIO number being read
* @return The current input or output value of the GPIO
*/
uint8_t read_ssus_gpio(uint8_t gpio_num)
{
uint8_t retval = 0;
if (gpio_num < GPSSUS_COUNT)
retval = ssus_get_gpio(gpssus_gpio_to_pad[gpio_num]);
return retval;
}
int get_write_protect_state(void)
{
/*
* The vboot loader queries this function in romstage. The GPIOs have
* not been set up yet as that configuration is done in ramstage. The
* hardware defaults to an input but there is a 20K pulldown. Externally
* there is a 10K pullup. Disable the internal pull in romstage so that
* there isn't any ambiguity in the reading.
*/
#if ENV_ROMSTAGE
ssus_disable_internal_pull(WP_STATUS_PAD);
#endif
/* WP is enabled when the pin is reading high. */
return ssus_get_gpio(WP_STATUS_PAD);
}