From 4ecdc746e9dbf47ce2604ddafd057a26d9d98044 Mon Sep 17 00:00:00 2001 From: Shannon Zhao Date: Thu, 17 Dec 2015 13:37:14 +0000 Subject: ACPI: Add GPIO Connection Descriptor Signed-off-by: Shannon Zhao Signed-off-by: Shannon Zhao Tested-by: Wei Huang Reviewed-by: Igor Mammedov Message-id: 1449804086-3464-7-git-send-email-zhaoshenglong@huawei.com Signed-off-by: Peter Maydell --- hw/acpi/aml-build.c | 68 +++++++++++++++++++++++++++++++++++++++++++++ include/hw/acpi/aml-build.h | 20 +++++++++++++ 2 files changed, 88 insertions(+) diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index cd25d06f05..d8c33a290e 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -564,6 +564,74 @@ Aml *aml_call4(const char *method, Aml *arg1, Aml *arg2, Aml *arg3, Aml *arg4) return var; } +/* + * ACPI 5.0: 6.4.3.8.1 GPIO Connection Descriptor + * Type 1, Large Item Name 0xC + */ + +static Aml *aml_gpio_connection(AmlGpioConnectionType type, + AmlConsumerAndProducer con_and_pro, + uint8_t flags, AmlPinConfig pin_config, + uint16_t output_drive, + uint16_t debounce_timeout, + const uint32_t pin_list[], uint32_t pin_count, + const char *resource_source_name, + const uint8_t *vendor_data, + uint16_t vendor_data_len) +{ + Aml *var = aml_alloc(); + const uint16_t min_desc_len = 0x16; + uint16_t resource_source_name_len, length; + uint16_t pin_table_offset, resource_source_name_offset, vendor_data_offset; + uint32_t i; + + assert(resource_source_name); + resource_source_name_len = strlen(resource_source_name) + 1; + length = min_desc_len + resource_source_name_len + vendor_data_len; + pin_table_offset = min_desc_len + 1; + resource_source_name_offset = pin_table_offset + pin_count * 2; + vendor_data_offset = resource_source_name_offset + resource_source_name_len; + + build_append_byte(var->buf, 0x8C); /* GPIO Connection Descriptor */ + build_append_int_noprefix(var->buf, length, 2); /* Length */ + build_append_byte(var->buf, 1); /* Revision ID */ + build_append_byte(var->buf, type); /* GPIO Connection Type */ + /* General Flags (2 bytes) */ + build_append_int_noprefix(var->buf, con_and_pro, 2); + /* Interrupt and IO Flags (2 bytes) */ + build_append_int_noprefix(var->buf, flags, 2); + /* Pin Configuration 0 = Default 1 = Pull-up 2 = Pull-down 3 = No Pull */ + build_append_byte(var->buf, pin_config); + /* Output Drive Strength (2 bytes) */ + build_append_int_noprefix(var->buf, output_drive, 2); + /* Debounce Timeout (2 bytes) */ + build_append_int_noprefix(var->buf, debounce_timeout, 2); + /* Pin Table Offset (2 bytes) */ + build_append_int_noprefix(var->buf, pin_table_offset, 2); + build_append_byte(var->buf, 0); /* Resource Source Index */ + /* Resource Source Name Offset (2 bytes) */ + build_append_int_noprefix(var->buf, resource_source_name_offset, 2); + /* Vendor Data Offset (2 bytes) */ + build_append_int_noprefix(var->buf, vendor_data_offset, 2); + /* Vendor Data Length (2 bytes) */ + build_append_int_noprefix(var->buf, vendor_data_len, 2); + /* Pin Number (2n bytes)*/ + for (i = 0; i < pin_count; i++) { + build_append_int_noprefix(var->buf, pin_list[i], 2); + } + + /* Resource Source Name */ + build_append_namestring(var->buf, "%s", resource_source_name); + build_append_byte(var->buf, '\0'); + + /* Vendor-defined Data */ + if (vendor_data != NULL) { + g_array_append_vals(var->buf, vendor_data, vendor_data_len); + } + + return var; +} + /* * ACPI 1.0b: 6.4.3.4 32-Bit Fixed Location Memory Range Descriptor * (Type 1, Large Item Name 0x6) diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h index c2c0be3e77..f1817e472e 100644 --- a/include/hw/acpi/aml-build.h +++ b/include/hw/acpi/aml-build.h @@ -154,6 +154,26 @@ typedef enum { AML_SERIALIZED = 1, } AmlSerializeFlag; +/* + * ACPI 5.0: Table 6-189 GPIO Connection Descriptor Definition + * GPIO Connection Type + */ +typedef enum { + AML_INTERRUPT_CONNECTION = 0, + AML_IO_CONNECTION = 1, +} AmlGpioConnectionType; + +/* + * ACPI 5.0: Table 6-189 GPIO Connection Descriptor Definition + * _PPI field definition + */ +typedef enum { + AML_PULL_DEFAULT = 0, + AML_PULL_UP = 1, + AML_PULL_DOWN = 2, + AML_PULL_NONE = 3, +} AmlPinConfig; + typedef struct AcpiBuildTables { GArray *table_data; -- cgit v1.2.3