Ejemplo n.º 1
0
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];
}
Ejemplo n.º 2
0
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];
}
Ejemplo n.º 3
0
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);
}