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power/rk3399: Support USB wake in host-requested wakeable S3

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For boards with POWER_SEQUENCING_VERSION = 2 (and likely future
versions), allow the host to request "wakeable suspend", which will
leave rails enabled to allow wake-on-usb.

BUG=b:63037490
BRANCH=kevin
TEST=With subsequent commit, compile on scarlet w/ power sequencing
version = 2.

Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>

Change-Id: Iaadd371b1d1509d185c8c8306b72760dcfe9989f
Reviewed-on: https://chromium-review.googlesource.com/572211
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Philip Chen <philipchen@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2017-07-14 13:10:34 -07:00
committed by chrome-bot
parent 2f09d4adea
commit 51ea502041
1 changed files with 49 additions and 6 deletions
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55
power/rk3399.c
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@@ -50,6 +50,8 @@
#if CONFIG_CHIPSET_POWER_SEQ_VERSION == 2
#define IN_PGOOD_S3 (IN_PGOOD_PP1250_S3)
#define IN_PGOOD_S0 (IN_PGOOD_S3 | IN_PGOOD_PP900_S0 | IN_PGOOD_AP)
/* This board can optionally wake-on-USB in S3 */
#define S3_USB_WAKE
#else
#define IN_PGOOD_S3 (IN_PGOOD_PP5000)
#define IN_PGOOD_S0 (IN_PGOOD_S3 | IN_PGOOD_AP | IN_PGOOD_SYS)
@@ -111,9 +113,6 @@ static const struct power_seq_op s5s3_power_seq[] = {
/* The power sequence for POWER_S3S0 */
static const struct power_seq_op s3s0_power_seq[] = {
#if CONFIG_CHIPSET_POWER_SEQ_VERSION == 2
{ GPIO_PP900_S0_EN, 1, 2 },
{ GPIO_PP1800_USB_EN, 1, 2 },
{ GPIO_PP3300_S0_EN, 1, 2 },
{ GPIO_AP_CORE_EN, 1, 2 },
{ GPIO_PP1800_S0_EN, 1, 0},
#else
@@ -126,14 +125,20 @@ static const struct power_seq_op s3s0_power_seq[] = {
#endif
};
#ifdef S3_USB_WAKE
/* Sigs that may already be on in S3, if we need to wake-on-USB */
static const struct power_seq_op s3s0_usb_wake_power_seq[] = {
{ GPIO_PP900_S0_EN, 1, 2 },
{ GPIO_PP1800_USB_EN, 1, 2 },
{ GPIO_PP3300_S0_EN, 1, 2 },
};
#endif
/* The power sequence for POWER_S0S3 */
static const struct power_seq_op s0s3_power_seq[] = {
#if CONFIG_CHIPSET_POWER_SEQ_VERSION == 2
{ GPIO_PP1800_S0_EN, 0, 1 },
{ GPIO_AP_CORE_EN, 0, 20 },
{ GPIO_PP3300_S0_EN, 0, 20 },
{ GPIO_PP1800_USB_EN, 0, 1 },
{ GPIO_PP900_S0_EN, 0, 1 },
#else
{ GPIO_PP3300_S0_EN_L, 1, 20 },
{ GPIO_PP1800_S0_EN_L, 1, 1 },
@@ -144,6 +149,15 @@ static const struct power_seq_op s0s3_power_seq[] = {
#endif
};
#ifdef S3_USB_WAKE
/* Sigs that need to be left on in S3, if we need to wake-on-USB */
static const struct power_seq_op s0s3_usb_wake_power_seq[] = {
{ GPIO_PP3300_S0_EN, 0, 20 },
{ GPIO_PP1800_USB_EN, 0, 1 },
{ GPIO_PP900_S0_EN, 0, 1 },
};
#endif
/* The power sequence for POWER_S3S5 */
static const struct power_seq_op s3s5_power_seq[] = {
#if CONFIG_CHIPSET_POWER_SEQ_VERSION == 2
@@ -282,6 +296,9 @@ static int power_seq_run(const struct power_seq_op *power_seq_ops, int op_count)
enum power_state power_handle_state(enum power_state state)
{
static int sys_reset_asserted;
#ifdef S3_USB_WAKE
static int usb_wake_enabled;
#endif
int tries = 0;
switch (state) {
@@ -380,6 +397,13 @@ enum power_state power_handle_state(enum power_state state)
return POWER_S3;
case POWER_S3S0:
#ifdef S3_USB_WAKE
/* Bring up S3 USB wake rails, if they are down */
if (!usb_wake_enabled)
power_seq_run(s3s0_usb_wake_power_seq,
ARRAY_SIZE(s3s0_usb_wake_power_seq));
usb_wake_enabled = 0;
#endif
power_seq_run(s3s0_power_seq, ARRAY_SIZE(s3s0_power_seq));
/* Release SYS_RST if we came from S5 */
@@ -415,6 +439,16 @@ enum power_state power_handle_state(enum power_state state)
if (power_seq_run(s0s3_power_seq, ARRAY_SIZE(s0s3_power_seq)))
return POWER_S3S0;
#ifdef S3_USB_WAKE
/* Leave up rails needed for S3 USB wake, if requested */
usb_wake_enabled = (power_get_host_sleep_state() ==
HOST_SLEEP_EVENT_S3_WAKEABLE_SUSPEND);
if (!usb_wake_enabled &&
power_seq_run(s0s3_usb_wake_power_seq,
ARRAY_SIZE(s0s3_power_seq)))
return POWER_S3S0;
#endif
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S3 or lower.
@@ -433,6 +467,15 @@ enum power_state power_handle_state(enum power_state state)
return POWER_S3;
case POWER_S3S5:
#ifdef S3_USB_WAKE
/* Make sure all S3 rails are off */
if (usb_wake_enabled) {
power_seq_run(s0s3_usb_wake_power_seq,
ARRAY_SIZE(s0s3_power_seq));
usb_wake_enabled = 0;
}
#endif
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SHUTDOWN);