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it83xx: espi: enable eSPI_reset#

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With this patch, EC will reset peripheral, OOB message,
virtual wire, and flash access channels to default settings
while the eSPI_reset# pin is asserted.

BUG=b:80250980
BRANCH=none
TEST=ran console command `hibernate` or 'apshutdown' during system boot
     to kernel and then wake system up by power button x 100.

Change-Id: Iceb7ddf1a045937c004f429fc46a7346578b0cce
Signed-off-by: Dino Li <Dino.Li@ite.com.tw>
Reviewed-on: https://chromium-review.googlesource.com/1074672
Tested-by: Stephanie Payton <stephie0128@gmail.com>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
This commit is contained in:
Dino Li
2018-06-05 14:41:03 +08:00
committed by chrome-bot
parent c06b391677
commit 8290d879da
6 changed files with 45 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
board/bip/board.c
View File

@@ -17,6 +17,7 @@
#include "gpio.h"
#include "hooks.h"
#include "i2c.h"
#include "intc.h"
#include "keyboard_scan.h"
#include "lid_switch.h"
#include "power.h"

4
board/bip/gpio.inc
View File

@@ -32,6 +32,10 @@ GPIO_INT(RSMRST_L_PGOOD, PIN(F, 1), GPIO_INT_BOTH, power_signal_interrupt) /* PM
GPIO_INT(ALL_SYS_PGOOD, PIN(F, 0), GPIO_INT_BOTH, power_signal_interrupt) /* PMIC_EC_PWROK_OD */
GPIO_INT(AC_PRESENT, PIN(A, 7), GPIO_INT_BOTH, extpower_interrupt) /* ACOK_OD */
#ifdef CONFIG_HOSTCMD_ESPI
/* enable 1.8v input of EC's espi_reset pin, and then this pin takes effect. */
GPIO_INT(ESPI_RESET_L, PIN(D, 2), GPIO_INT_FALLING | GPIO_SEL_1P8V, espi_reset_pin_asserted_interrupt) /* eSPI_reset# */
#endif
GPIO(PCH_PLTRST_L, PIN(E, 3), GPIO_INPUT) /* PLT_RST_L: Platform Reset from SoC */
GPIO(SYS_RESET_L, PIN(B, 6), GPIO_ODR_HIGH) /* SYS_RST_ODL */

1
board/glkrvp_ite/board.c
View File

@@ -15,6 +15,7 @@
#include "host_command.h"
#include "i2c.h"
#include "ioexpander_pca9555.h"
#include "intc.h"
#include "keyboard_scan.h"
#include "lid_switch.h"
#include "power.h"

4
board/glkrvp_ite/gpio.inc
View File

@@ -29,6 +29,10 @@ GPIO_INT(POWER_BUTTON_L,PIN(E, 4), GPIO_INT_BOTH, power_button_interrupt)
GPIO_INT(AC_PRESENT, PIN(A, 6), GPIO_INT_BOTH, extpower_interrupt)
GPIO_INT(UART1_RX, PIN(B, 0), GPIO_INT_FALLING, uart_deepsleep_interrupt) /* UART1 RX input */
#ifdef CONFIG_HOSTCMD_ESPI
/* enable 1.8v input of EC's espi_reset pin, and then this pin takes effect. */
GPIO_INT(ESPI_RESET_L, PIN(D, 2), GPIO_INT_FALLING | GPIO_SEL_1P8V, espi_reset_pin_asserted_interrupt) /* eSPI_reset# */
#endif
/* Type-C interrupts */
UNIMPLEMENTED(USB_C0_PD_INT_ODL)

34
chip/it83xx/espi.c
View File

@@ -417,6 +417,37 @@ static void espi_reset_vw_index_flags(void)
vw_index_flag[i] = IT83XX_ESPI_VWIDX(vw_isr_list[i].vw_index);
}
void espi_reset_pin_asserted_interrupt(enum gpio_signal signal)
{
/* reset vw_index_flag when espi_reset# asserted. */
espi_reset_vw_index_flags();
}
static void espi_enable_reset(void)
{
const struct gpio_info *espi_rst = gpio_list + GPIO_ESPI_RESET_L;
/*
* bit[2-1]:
* 00b: reserved.
* 01b: espi_reset# is enabled on GPB7.
* 10b: espi_reset# is enabled on GPD2.
* 11b: reset is disabled.
*/
if (espi_rst->port == GPIO_D && espi_rst->mask == (1 << 2)) {
IT83XX_GPIO_GCR = (IT83XX_GPIO_GCR & ~0x6) | (1 << 2);
} else if (espi_rst->port == GPIO_B && espi_rst->mask == (1 << 7)) {
IT83XX_GPIO_GCR = (IT83XX_GPIO_GCR & ~0x6) | (1 << 1);
} else {
IT83XX_GPIO_GCR |= 0x6;
CPRINTS("EC's espi_reset pin is not enabled correctly");
}
/* enable interrupt of EC's espi_reset pin */
gpio_clear_pending_interrupt(GPIO_ESPI_RESET_L);
gpio_enable_interrupt(GPIO_ESPI_RESET_L);
}
/* Interrupt event of master enables the VW channel. */
static void espi_vw_en_asserted(uint8_t evt)
{
@@ -515,4 +546,7 @@ void espi_init(void)
/* bit4: eSPI to WUC enable */
IT83XX_ESPI_ESGCTRL2 |= (1 << 4);
task_enable_irq(IT83XX_IRQ_ESPI);
/* enable interrupt and reset from eSPI_reset# */
espi_enable_reset();
}

1
chip/it83xx/intc.h
View File

@@ -21,6 +21,7 @@ void i2c_interrupt(int port);
void clock_sleep_mode_wakeup_isr(void);
int clock_ec_wake_from_sleep(void);
void __enter_hibernate(uint32_t seconds, uint32_t microseconds);
void espi_reset_pin_asserted_interrupt(enum gpio_signal signal);
void espi_interrupt(void);
void espi_vw_interrupt(void);
void espi_init(void);