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-rw-r--r--src/arch/x86/acpigen.c17
-rw-r--r--src/arch/x86/include/arch/acpigen.h10
2 files changed, 27 insertions, 0 deletions
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c
index 72605bb766..9162cdb371 100644
--- a/src/arch/x86/acpigen.c
+++ b/src/arch/x86/acpigen.c
@@ -1203,6 +1203,15 @@ void acpigen_write_or(uint8_t arg1, uint8_t arg2, uint8_t res)
acpigen_emit_byte(res);
}
+/* Xor (arg1, arg2, res) */
+void acpigen_write_xor(uint8_t arg1, uint8_t arg2, uint8_t res)
+{
+ acpigen_emit_byte(XOR_OP);
+ acpigen_emit_byte(arg1);
+ acpigen_emit_byte(arg2);
+ acpigen_emit_byte(res);
+}
+
/* And (arg1, arg2, res) */
void acpigen_write_and(uint8_t arg1, uint8_t arg2, uint8_t res)
{
@@ -1759,6 +1768,14 @@ int acpigen_disable_tx_gpio(struct acpi_gpio *gpio)
return acpigen_soc_clear_tx_gpio(gpio->pins[0]);
}
+void acpigen_get_rx_gpio(struct acpi_gpio *gpio)
+{
+ acpigen_soc_read_rx_gpio(gpio->pins[0]);
+
+ if (gpio->polarity == ACPI_GPIO_ACTIVE_LOW)
+ acpigen_write_xor(LOCAL0_OP, 1, LOCAL0_OP);
+}
+
/* refer to ACPI 6.4.3.5.3 Word Address Space Descriptor section for details */
void acpigen_resource_word(u16 res_type, u16 gen_flags, u16 type_flags, u16 gran,
u16 range_min, u16 range_max, u16 translation, u16 length)
diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h
index 08075585ca..34c5197468 100644
--- a/src/arch/x86/include/arch/acpigen.h
+++ b/src/arch/x86/include/arch/acpigen.h
@@ -361,6 +361,7 @@ void acpigen_write_sleep(uint64_t sleep_ms);
void acpigen_write_store(void);
void acpigen_write_store_ops(uint8_t src, uint8_t dst);
void acpigen_write_or(uint8_t arg1, uint8_t arg2, uint8_t res);
+void acpigen_write_xor(uint8_t arg1, uint8_t arg2, uint8_t res);
void acpigen_write_and(uint8_t arg1, uint8_t arg2, uint8_t res);
void acpigen_write_not(uint8_t arg, uint8_t res);
void acpigen_write_debug_string(const char *str);
@@ -472,6 +473,14 @@ int acpigen_soc_clear_tx_gpio(unsigned int gpio_num);
int acpigen_enable_tx_gpio(struct acpi_gpio *gpio);
int acpigen_disable_tx_gpio(struct acpi_gpio *gpio);
+/*
+ * Helper function for getting a RX GPIO value based on the GPIO polarity.
+ * The return value is stored in Local0 variable.
+ * This function ends up calling acpigen_soc_get_rx_gpio to make callbacks
+ * into SoC acpigen code
+ */
+void acpigen_get_rx_gpio(struct acpi_gpio *gpio);
+
/* refer to ACPI 6.4.3.5.3 Word Address Space Descriptor section for details */
void acpigen_resource_word(u16 res_type, u16 gen_flags, u16 type_flags, u16 gran,
u16 range_min, u16 range_max, u16 translation, u16 length);
@@ -481,4 +490,5 @@ void acpigen_resource_dword(u16 res_type, u16 gen_flags, u16 type_flags,
/* refer to ACPI 6.4.3.5.1 QWord Address Space Descriptor section for details */
void acpigen_resource_qword(u16 res_type, u16 gen_flags, u16 type_flags,
u64 gran, u64 range_min, u64 range_max, u64 translation, u64 length);
+
#endif