[edk2-devel] [PATCH v4 3/3] Platform/RaspberryPi: Enable Bluetooth and UART in Windows OS
Pete Batard
pete at akeo.ie
Sat Jun 12 13:40:11 UTC 2021
On 2021.06.07 08:53, Sunny Wang wrote:
> This change is based on edk2-platforms-raspberrypi-pl011-bth-noflow.diff
> in https://github.com/worproject/RPi-Bluetooth-Testing/ with the
> modifications and additional changes below for enabling Bluetooth
> and serial port (Mini UART) in Windows IOT.
> - Remove RPIQ connection for BT_ON/OFF in Uart.asl because it is
> useless. The firmware already turns on the Bluetooth by default.
> - Move the GPIO pin muxing stuff from Uart.asl to ConfigDxe driver.
>
> Testing Done:
> - Successfully booted Windows Windows 10 IOT (20279.1) on SD (made by
> WOR) with the RPi-Windows-Drivers release ver 0.5 downloaded from
> https://github.com/worproject/RPi-Windows-Drivers/releases
> and checked that both Bluetooth and serial port (Mini UART) can
> work fine.
> - Successfully booted VMware ESXi-Arm Fling v1.3 with only serial
> console connection (PL011 UART).
>
> Cc: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud at arm.com>
> Cc: Sami Mujawar <sami.mujawar at arm.com>
> Cc: Jeremy Linton <jeremy.linton at arm.com>
> Cc: Pete Batard <pete at akeo.ie>
> Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
> Cc: Mario Bălănică <mariobalanica02 at gmail.com>
> Signed-off-by: Sunny Wang <sunny.wang at arm.com>
> ---
> Platform/RaspberryPi/AcpiTables/Uart.asl | 16 --------------
> .../RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 22 +++++++++++++++++++
> 2 files changed, 22 insertions(+), 16 deletions(-)
>
> diff --git a/Platform/RaspberryPi/AcpiTables/Uart.asl b/Platform/RaspberryPi/AcpiTables/Uart.asl
> index bac9d791eb..167f94e889 100644
> --- a/Platform/RaspberryPi/AcpiTables/Uart.asl
> +++ b/Platform/RaspberryPi/AcpiTables/Uart.asl
> @@ -71,14 +71,6 @@ Device (URTM)
> MEMORY32FIXED (ReadWrite, 0, BCM2836_MINI_UART_LENGTH, RMEM)
> Interrupt(ResourceConsumer, Level, ActiveHigh, Shared) { BCM2836_MINI_UART_INTERRUPT }
>
> - // NTRAID#MSFT-7141401-2016/04/7-jordanrh - disable UART muxing
> - // until a proper solution can be created for the dmap conflict.
> - // When muxing is enabled, must consider DBG2 table conflict.
> - // The alternate function resource needs to be reserved when
> - // the kernel debugger is enabled to prevent another client
> - // from muxing the pins away.
> -
> - // PinFunction (Exclusive, PullDown, BCM_ALT5, "\\_SB.GPI0", 0, ResourceConsumer, , ) { 14, 15 }
> })
> Method (_CRS, 0x0, Serialized)
> {
> @@ -143,10 +135,6 @@ Device(BTH0)
> UAR0, // DescriptorName: creates name
> // for offset of resource descriptor
> ) // Vendor data
> - //
> - // RPIQ connection for BT_ON/OFF
> - //
> - GpioIO (Shared, PullUp, 0, 0, IoRestrictionNone, "\\_SB.GDV0.RPIQ", 0, ResourceConsumer, , ) { 128 }
> })
>
> //
> @@ -190,10 +178,6 @@ Device(BTH0)
> UARM, // DescriptorName: creates name
> // for offset of resource descriptor
> ) // Vendor data
> - //
> - // RPIQ connection for BT_ON/OFF
> - //
> - GpioIO (Shared, PullUp, 0, 0, IoRestrictionNone, "\\_SB.GDV0.RPIQ", 0, ResourceConsumer, , ) { 128 }
> })
>
> Method (_CRS, 0x0, Serialized)
> diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
> index d6efb59793..cf9880bd20 100644
> --- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
> +++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
> @@ -618,6 +618,28 @@ ApplyVariables (
> DEBUG ((DEBUG_INFO, "Fan enabled on GPIO %d\n", FanOnGpio));
> GpioPinFuncSet (FanOnGpio, GPIO_FSEL_OUTPUT);
> }
> +
> + //
> + // Fake the CTS signal as we don't support HW flow control yet.
> + // Pin 31 must be held LOW so that we can talk to the BT chip
> + // without flow control
> + //
> + GpioPinFuncSet (31, GPIO_FSEL_OUTPUT);
> + GpioPinConfigure (31, CLEAR_GPIO);
> +
> + //
> + // Bluetooth pin muxing
> + //
> + if ((PcdGet32 (PcdUartInUse) == PL011_UART_IN_USE)) {
> + DEBUG ((DEBUG_INFO, "Enable Bluetooth over MiniUART\n"));
> + GpioPinFuncSet (32, GPIO_FSEL_ALT5);
> + GpioPinFuncSet (33, GPIO_FSEL_ALT5);
> + } else {
> + DEBUG ((DEBUG_INFO, "Enable Bluetooth over PL011 UART\n"));
> + GpioPinFuncSet (32, GPIO_FSEL_ALT3);
> + GpioPinFuncSet (33, GPIO_FSEL_ALT3);
> + }
> +
> }
>
>
>
Reviewed-by: Pete Batard <pete at akeo.ie>
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