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ec/google/wilco: Add power related mailbox commands

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Add EC mailbox commands that are related to the power and state of the
system.  These commands include:

- read the power status registers from the EC
- read & clear the power status registers
- helper function to read the current lid state
- tell the EC why the host is about to power off
- tell the EC that the host is about to enter a sleep state

Change-Id: Iaa7051b4006e3c1687933e0384d962516220621f
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29116
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Duncan Laurie
2018-10-15 02:28:54 +00:00
committed by Duncan Laurie
parent b0bf280be4
commit 2f954921b8
2 changed files with 241 additions and 0 deletions
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99
src/ec/google/wilco/commands.c
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@ -50,3 +50,102 @@ void wilco_ec_print_all_info(void)
if (!wilco_ec_get_info(GET_EC_BUILD_DATE, info))
printk(BIOS_INFO, "EC Build Date : %s\n", info);
}
static int wilco_ec_get_power_smi(struct ec_pm_event_state *pm)
{
struct ec_response_power_smi {
uint8_t pm_event_1;
uint8_t pm_state_1;
uint8_t hotkey;
uint8_t pm_state_2;
uint8_t pm_state_3;
uint8_t pm_state_4;
uint8_t pm_state_5;
uint8_t pm_event_2;
uint8_t pm_state_6;
} __packed rsp;
if (!pm)
return -1;
if (wilco_ec_sendrecv_noargs(KB_POWER_SMI, &rsp, sizeof(rsp)) < 0)
return -1;
pm->event[0] = rsp.pm_event_1;
pm->event[1] = rsp.pm_event_2;
pm->state[0] = rsp.pm_state_1;
pm->state[1] = rsp.pm_state_2;
pm->state[2] = rsp.pm_state_3;
pm->state[3] = rsp.pm_state_4;
pm->state[4] = rsp.pm_state_5;
pm->state[5] = rsp.pm_state_6;
pm->hotkey = rsp.hotkey;
return 0;
}
static int wilco_ec_get_power_status(struct ec_pm_event_state *pm)
{
struct ec_response_power_status {
uint8_t pm_state_1;
uint8_t pm_state_2;
uint8_t pm_state_3;
uint8_t pm_state_4;
uint8_t pm_state_5;
uint8_t ac_type_lsb;
uint8_t pm_state_6;
uint8_t pm_event_2;
uint8_t ac_type_msb;
} __packed rsp;
if (!pm)
return -1;
if (wilco_ec_sendrecv_noargs(KB_POWER_STATUS, &rsp, sizeof(rsp)) < 0)
return -1;
pm->hotkey = 0;
pm->event[0] = 0;
pm->event[1] = rsp.pm_event_2;
pm->state[0] = rsp.pm_state_1;
pm->state[1] = rsp.pm_state_2;
pm->state[2] = rsp.pm_state_3;
pm->state[3] = rsp.pm_state_4;
pm->state[4] = rsp.pm_state_5;
pm->state[5] = rsp.pm_state_6;
pm->ac_type = rsp.ac_type_msb << 8 | rsp.ac_type_lsb;
return 0;
}
int wilco_ec_get_pm(struct ec_pm_event_state *pm, bool clear)
{
if (clear)
return wilco_ec_get_power_smi(pm);
else
return wilco_ec_get_power_status(pm);
}
int wilco_ec_get_lid_state(void)
{
struct ec_pm_event_state pm;
if (wilco_ec_get_power_status(&pm) < 0)
return -1;
return !!(pm.state[0] & EC_PM1_LID_OPEN);
}
void wilco_ec_slp_en(void)
{
/* EC does not respond to this command */
if (wilco_ec_mailbox(WILCO_EC_MSG_NO_RESPONSE,
KB_SLP_EN, NULL, 0, NULL, 0) < 0)
printk(BIOS_ERR, "%s: command failed\n", __func__);
}
void wilco_ec_power_off(enum ec_power_off_reason reason)
{
/* EC does not respond to this command */
if (wilco_ec_mailbox(WILCO_EC_MSG_NO_RESPONSE,
KB_POWER_OFF, &reason, 1, NULL, 0) < 0)
printk(BIOS_ERR, "%s: command failed\n", __func__);
}