From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43397) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cMz0X-0002Pc-Ag for qemu-devel@nongnu.org; Fri, 30 Dec 2016 10:22:14 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cMz0W-0000J7-7p for qemu-devel@nongnu.org; Fri, 30 Dec 2016 10:22:13 -0500 Received: from mail-pg0-x242.google.com ([2607:f8b0:400e:c05::242]:35919) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cMz0W-0000Iu-2u for qemu-devel@nongnu.org; Fri, 30 Dec 2016 10:22:12 -0500 Received: by mail-pg0-x242.google.com with SMTP id n5so22380992pgh.3 for ; Fri, 30 Dec 2016 07:22:12 -0800 (PST) Sender: Corey Minyard From: minyard@acm.org Date: Fri, 30 Dec 2016 09:21:42 -0600 Message-Id: <1483111310-24808-12-git-send-email-minyard@acm.org> In-Reply-To: <1483111310-24808-1-git-send-email-minyard@acm.org> References: <1483111310-24808-1-git-send-email-minyard@acm.org> Subject: [Qemu-devel] [PATCH 11/19] acpi: Add i2c serial bus CRS handling List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: minyard@acm.org, Corey Minyard From: Corey Minyard Signed-off-by: Corey Minyard --- hw/acpi/aml-build.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/hw/acpi/aml-build.h | 18 ++++++++++++++++++ 2 files changed, 58 insertions(+) diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index b2a1e40..7b2673f 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -1607,3 +1607,43 @@ void build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base, numamem->base_addr = cpu_to_le64(base); numamem->range_length = cpu_to_le64(len); } + +/* ACPI 5.0: 6.4.3.8.2 Serial Bus Connection Descriptors */ +static Aml *aml_serial_bus_device(uint8_t serial_bus_type, uint8_t flags, + uint16_t type_flags, + uint8_t revid, uint16_t data_length, + uint16_t resource_source_len) +{ + Aml *var = aml_alloc(); + uint16_t length = data_length + resource_source_len + 9; + + build_append_byte(var->buf, 0x8e); /* Serial Bus Connection Descriptor */ + build_append_int_noprefix(var->buf, length, sizeof(length)); + build_append_byte(var->buf, 1); /* Revision ID */ + build_append_byte(var->buf, 0); /* Resource Source Index */ + build_append_byte(var->buf, serial_bus_type); /* Serial Bus Type */ + build_append_byte(var->buf, flags); /* General Flags */ + build_append_int_noprefix(var->buf, type_flags, /* Type Specific Flags */ + sizeof(type_flags)); + build_append_byte(var->buf, revid); /* Type Specification Revision ID */ + build_append_int_noprefix(var->buf, data_length, sizeof(data_length)); + + return var; +} + +/* ACPI 5.0: 6.4.3.8.2.1 I2C Serial Bus Connection Resource Descriptor */ +Aml *aml_i2c_serial_bus_device(uint16_t address, const char *resource_source) +{ + uint16_t resource_source_len = strlen(resource_source) + 1; + Aml *var = aml_serial_bus_device(AML_SERIAL_BUS_TYPE_I2C, 0, 0, 1, + 6, resource_source_len); + + /* Connection Speed. Just set to 100K for now, it doesn't really matter. */ + build_append_int_noprefix(var->buf, 100000, 4); + build_append_int_noprefix(var->buf, address, sizeof(address)); + + /* This is a string, not a name, so just copy it directly in. */ + g_array_append_vals(var->buf, resource_source, resource_source_len); + + return var; +} diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h index 559326c..27e23b1 100644 --- a/include/hw/acpi/aml-build.h +++ b/include/hw/acpi/aml-build.h @@ -213,6 +213,23 @@ struct AcpiBuildTables { BIOSLinker *linker; } AcpiBuildTables; +/* + * ACPI 5.0: 6.4.3.8.2 Serial Bus Connection Descriptors + * Serial Bus Type + */ +#define AML_SERIAL_BUS_TYPE_I2C 1 +#define AML_SERIAL_BUS_TYPE_SPI 2 +#define AML_SERIAL_BUS_TYPE_UART 3 + +/* + * ACPI 5.0: 6.4.3.8.2 Serial Bus Connection Descriptors + * General Flags + */ +/* Slave Mode */ +#define AML_SERIAL_BUS_FLAG_MASTER_DEVICE (1 << 0) +/* Consumer/Producer */ +#define AML_SERIAL_BUS_FLAG_CONSUME_ONLY (1 << 1) + /** * init_aml_allocator: * @@ -337,6 +354,7 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed min_fixed, Aml *aml_dma(AmlDmaType typ, AmlDmaBusMaster bm, AmlTransferSize sz, uint8_t channel); Aml *aml_sleep(uint64_t msec); +Aml *aml_i2c_serial_bus_device(uint16_t address, const char *resource_source); /* Block AML object primitives */ Aml *aml_scope(const char *name_format, ...) GCC_FMT_ATTR(1, 2); -- 2.7.4