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espi: mec172x: Read ACPI EC data in IBF ISR

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Handle ACPI EC0 and ACPI EC1 IBF ISR by reading input
data in the ISR

Signed-off-by: Jay Vasanth <jay.vasanth@microchip.com>
This commit is contained in:
Jay Vasanth 2022-03-04 18:20:58 -05:00 • committed by Maureen Helm
commit 3abfb58741
2 changed files with 41 additions and 0 deletions
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8
drivers/espi/Kconfig.xec_v2
View file

@ -145,4 +145,12 @@ config ESPI_SAF_INIT_PRIORITY
help
Driver initialization priority for eSPI SAF driver.
config ESPI_PERIPHERAL_ACPI_EC_IBF_EVT_DATA
bool "Read ACPI EC Event Data in IBF ISR"
depends on ESPI_PERIPHERAL_CHANNEL
help
Enable reading event data in ACPI EC IBF ISR. This is used in OS
environment where application expects IBF ISR to read data and pass
to callback.
endif #ESPI_XEC_V2

33
drivers/espi/espi_mchp_xec_host_v2.c
View file

@ -379,6 +379,26 @@ static void acpi_ec0_ibf_isr(const struct device *dev)
struct espi_event evt = { ESPI_BUS_PERIPHERAL_NOTIFICATION,
ESPI_PERIPHERAL_HOST_IO, ESPI_PERIPHERAL_NODATA
};
#ifdef CONFIG_ESPI_PERIPHERAL_ACPI_EC_IBF_EVT_DATA
struct acpi_ec_regs *acpi_ec0_hw = (struct acpi_ec_regs *)xec_acpi_ec0_cfg.regbase;
/* Updates to fit Chrome shim layer design */
struct espi_evt_data_acpi *acpi_evt =
(struct espi_evt_data_acpi *)&evt.evt_data;
/* Host put data on input buffer of ACPI EC0 channel */
if (acpi_ec0_hw->EC_STS & MCHP_ACPI_EC_STS_IBF) {
/* Set processing flag before reading command byte */
acpi_ec0_hw->EC_STS |= MCHP_ACPI_EC_STS_UD1A;
/*
* Indicates if the host sent a command or data.
* 0 = data
* 1 = Command.
*/
acpi_evt->type = acpi_ec0_hw->EC_STS & MCHP_ACPI_EC_STS_CMD ? 1 : 0;
acpi_evt->data = acpi_ec0_hw->OS2EC_DATA;
}
#endif /* CONFIG_ESPI_PERIPHERAL_ACPI_EC_IBF_EVT_DATA */
espi_send_callbacks(&data->callbacks, dev, evt);
@ -514,6 +534,19 @@ static void acpi_ec1_ibf_isr(const struct device *dev)
#endif
.evt_data = ESPI_PERIPHERAL_NODATA
};
#ifdef CONFIG_ESPI_PERIPHERAL_ACPI_EC_IBF_EVT_DATA
struct acpi_ec_regs *acpi_ec1_hw = (struct acpi_ec_regs *)xec_acpi_ec1_cfg.regbase;
/* Updates to fit Chrome shim layer design.
* Host put data on input buffer of ACPI EC1 channel.
*/
if (acpi_ec1_hw->EC_STS & MCHP_ACPI_EC_STS_IBF) {
/* Set processing flag before reading command byte */
acpi_ec1_hw->EC_STS |= MCHP_ACPI_EC_STS_UD1A;
/* Read out input data and clear IBF pending bit */
evt.evt_data = acpi_ec1_hw->OS2EC_DATA;
}
#endif /* CONFIG_ESPI_PERIPHERAL_ACPI_EC_IBF_EVT_DATA */
espi_send_callbacks(&data->callbacks, dev, evt);