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baytrail: add support for routing gpio pins to smi/sci

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In order for gpio pins to trigger an smi/sci the GPIO_ROUT
register needs to be set accordingly. For SMI, the ALT_GPIO_SMI
register needs to be enabled for each gpio as well.

The first 8 gpios from the suspend and core well are the only gpios
that can trigger an SMI or SCI. The settings for the GPIO_ROUT
and ALT_GPIO_SMI register are not commited until the SMM settings
are enabled in the southcluster.

BUG=chrome-os-partner:23505
BRANCH=None
TEST=Built and booted. Manually triggered SCI by changing GPE0a_EN
     and toggling PCH_WAKE_L on the EC console.

Change-Id: Id79b70084edc39fc047475e984494c224bd75d6d
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/176390
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/4957
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
This commit is contained in:
Aaron Durbin
2013-11-11 12:09:28 -06:00
committed by Aaron Durbin
parent 997d25219b
commit 59a4cd5578
5 changed files with 93 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/soc/intel/baytrail/gpio.c
View File

@@ -17,9 +17,11 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <baytrail/gpio.h>
#include <device/pci.h>
#include <console/console.h>
#include <baytrail/gpio.h>
#include <baytrail/pmc.h>
#include <baytrail/smm.h>
/* GPIO-to-Pad LUTs */
static const u8 gpncore_gpio_to_pad[GPNCORE_COUNT] =
@@ -154,12 +156,36 @@ static void setup_gpios(const struct soc_gpio_map *gpios,
}
}
static void setup_gpio_route(const struct soc_gpio_map *sus,
const struct soc_gpio_map *core)
{
uint32_t route_reg = 0;
int i;
for (i = 0; i < 8; i++) {
/* SMI takes precedence and wake_en implies SCI. */
if (sus[i].smi) {
route_reg |= ROUTE_SMI << (2 * i);
} else if (sus[i].wake_en) {
route_reg |= ROUTE_SCI << (2 * i);
}
if (core[i].smi) {
route_reg |= ROUTE_SMI << (2 * (i + 8));
} else if (core[i].wake_en) {
route_reg |= ROUTE_SCI << (2 * (i + 8));
}
}
southcluster_smm_save_gpio_route(route_reg);
}
void setup_soc_gpios(struct soc_gpio_config *config)
{
if (config) {
setup_gpios(config->ncore, &gpncore_bank);
setup_gpios(config->score, &gpscore_bank);
setup_gpios(config->ssus, &gpssus_bank);
setup_gpio_route(config->ssus, config->score);
}
}