/** @file
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*
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* [DSDT] Serial devices (UART).
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*
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* Copyright (c) 2021, ARM Limited. All rights reserved.
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* Copyright (c) 2020, Pete Batard <pete@akeo.ie>
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* Copyright (c) 2018, Andrey Warkentin <andrey.warkentin@gmail.com>
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*
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**/
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#include <IndustryStandard/Bcm2836.h>
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#include "AcpiTables.h"
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// PL011 based UART.
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Device (URT0)
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{
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Name (_HID, "BCM2837")
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Name (_CID, "ARMH0011")
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Name (_UID, 0x4)
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Name (_CCA, 0x0)
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Method (_STA)
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{
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Return (0xf)
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}
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Name (RBUF, ResourceTemplate ()
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{
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MEMORY32FIXED (ReadWrite, 0, BCM2836_PL011_UART_LENGTH, RMEM)
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Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive) { BCM2836_PL011_UART_INTERRUPT }
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})
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Method (_CRS, 0x0, Serialized)
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{
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MEMORY32SETBASE (RBUF, RMEM, RBAS, BCM2836_PL011_UART_OFFSET)
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Return (^RBUF)
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}
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Name (CLCK, 48000000)
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Name (_DSD, Package ()
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{
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ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package ()
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{
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Package (2) { "clock-frequency", CLCK },
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}
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})
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}
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//
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// UART Mini.
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//
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// This device is referenced in the DBG2 table, which will cause the system to
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// not start the driver when the debugger is enabled and to mark the device
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// with problem code 53 (CM_PROB_USED_BY_DEBUGGER).
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//
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Device (URTM)
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{
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Name (_HID, "BCM2836")
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Name (_CID, "BCM2836")
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Name (_UID, 0x0)
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Name (_CCA, 0x0)
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Method (_STA)
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{
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Return (0xf)
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}
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Name (RBUF, ResourceTemplate ()
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{
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MEMORY32FIXED (ReadWrite, 0, BCM2836_MINI_UART_LENGTH, RMEM)
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Interrupt(ResourceConsumer, Level, ActiveHigh, Shared) { BCM2836_MINI_UART_INTERRUPT }
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})
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Method (_CRS, 0x0, Serialized)
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{
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MEMORY32SETBASE (RBUF, RMEM, RBAS, BCM2836_MINI_UART_OFFSET)
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Return (^RBUF)
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}
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}
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//
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// Multifunction serial bus device to support Bluetooth function.
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//
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Device(BTH0)
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{
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Name (_HID, "BCM2EA6")
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Name (_CID, "BCM2EA6")
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//
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// UART In Use will be dynamically updated during boot
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// 0x55 0x52 0x49 0x55 0xA 0x2 (Value must > 1)
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//
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Name (URIU, 0x2)
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Method (_STA)
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{
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Return (0xf)
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}
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//
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// Resource for URT0 (PL011)
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//
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Name (BTPL, ResourceTemplate ()
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{
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UARTSerialBus(
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115200, // InitialBaudRate: in BPS
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, // BitsPerByte: default to 8 bits
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, // StopBits: Defaults to one bit
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0x00, // LinesInUse: 8 1-bit flags to
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// declare enabled control lines.
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// Raspberry Pi does not exposed
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// HW control signals -> not supported.
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// Optional bits:
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// - Bit 7 (0x80) Request To Send (RTS)
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// - Bit 6 (0x40) Clear To Send (CTS)
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// - Bit 5 (0x20) Data Terminal Ready (DTR)
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// - Bit 4 (0x10) Data Set Ready (DSR)
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// - Bit 3 (0x08) Ring Indicator (RI)
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// - Bit 2 (0x04) Data Carrier Detect (DTD)
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// - Bit 1 (0x02) Reserved. Must be 0.
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// - Bit 0 (0x01) Reserved. Must be 0.
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, // IsBigEndian:
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// default to LittleEndian.
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, // Parity: Defaults to no parity
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, // FlowControl: Defaults to
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// no flow control.
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16, // ReceiveBufferSize
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16, // TransmitBufferSize
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"\\_SB.GDV0.URT0", // ResourceSource:
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// UART bus controller name
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, // ResourceSourceIndex: assumed to be 0
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, // ResourceUsage: assumed to be
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// ResourceConsumer
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UAR0, // DescriptorName: creates name
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// for offset of resource descriptor
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) // Vendor data
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})
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//
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// Resource for URTM (miniUART)
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//
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Name (BTMN, ResourceTemplate ()
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{
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//
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// BT UART: ResourceSource will be dynamically updated to
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// either URT0 (PL011) or URTM (miniUART) during boot
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//
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UARTSerialBus(
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115200, // InitialBaudRate: in BPS
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, // BitsPerByte: default to 8 bits
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, // StopBits: Defaults to one bit
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0x00, // LinesInUse: 8 1-bit flags to
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// declare enabled control lines.
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// Raspberry Pi does not exposed
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// HW control signals -> not supported.
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// Optional bits:
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// - Bit 7 (0x80) Request To Send (RTS)
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// - Bit 6 (0x40) Clear To Send (CTS)
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// - Bit 5 (0x20) Data Terminal Ready (DTR)
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// - Bit 4 (0x10) Data Set Ready (DSR)
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// - Bit 3 (0x08) Ring Indicator (RI)
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// - Bit 2 (0x04) Data Carrier Detect (DTD)
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// - Bit 1 (0x02) Reserved. Must be 0.
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// - Bit 0 (0x01) Reserved. Must be 0.
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, // IsBigEndian:
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// default to LittleEndian.
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, // Parity: Defaults to no parity
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, // FlowControl: Defaults to
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// no flow control.
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16, // ReceiveBufferSize
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16, // TransmitBufferSize
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"\\_SB.GDV0.URTM", // ResourceSource:
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// UART bus controller name
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, // ResourceSourceIndex: assumed to be 0
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, // ResourceUsage: assumed to be
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// ResourceConsumer
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UARM, // DescriptorName: creates name
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// for offset of resource descriptor
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) // Vendor data
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})
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Method (_CRS, 0x0, Serialized)
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{
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if (URIU == 0)
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{
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//
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// PL011 UART is configured for console output
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// Return Mini UART for Bluetooth
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//
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return (^BTMN)
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}
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else
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{
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//
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// Mini UART is configured for console output
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// Return PL011 UART for Bluetooth
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//
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return (^BTPL)
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}
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}
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}
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