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RpiFirmwareDxe.c
1329 lines (1124 loc) · 35.1 KB
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RpiFirmwareDxe.c
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/** @file
*
* Copyright (c) 2020, Pete Batard <pete@akeo.ie>
* Copyright (c) 2019, ARM Limited. All rights reserved.
* Copyright (c) 2017-2018, Andrei Warkentin <andrey.warkentin@gmail.com>
* Copyright (c) 2016, Linaro, Ltd. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/
#include <PiDxe.h>
#include <Library/ArmLib.h>
#include <Library/DmaLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/IoLib.h>
#include <Library/SynchronizationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <IndustryStandard/Bcm2836.h>
#include <IndustryStandard/RpiMbox.h>
#include <Protocol/RpiFirmware.h>
//
// The number of statically allocated buffer pages
//
#define NUM_PAGES 1
STATIC VOID *mDmaBuffer;
STATIC VOID *mDmaBufferMapping;
STATIC UINTN mDmaBufferBusAddress;
STATIC SPIN_LOCK mMailboxLock;
STATIC
BOOLEAN
DrainMailbox (
VOID
)
{
INTN Tries;
UINT32 Val;
//
// Get rid of stale response data in the mailbox
//
Tries = 0;
do {
Val = MmioRead32 (BCM2836_MBOX_BASE_ADDRESS + BCM2836_MBOX_STATUS_OFFSET);
if (Val & (1U << BCM2836_MBOX_STATUS_EMPTY)) {
return TRUE;
}
ArmDataSynchronizationBarrier ();
MmioRead32 (BCM2836_MBOX_BASE_ADDRESS + BCM2836_MBOX_READ_OFFSET);
} while (++Tries < RPI_MBOX_MAX_TRIES);
return FALSE;
}
STATIC
BOOLEAN
MailboxWaitForStatusCleared (
IN UINTN StatusMask
)
{
INTN Tries;
UINT32 Val;
//
// Get rid of stale response data in the mailbox
//
Tries = 0;
do {
Val = MmioRead32 (BCM2836_MBOX_BASE_ADDRESS + BCM2836_MBOX_STATUS_OFFSET);
if ((Val & StatusMask) == 0) {
return TRUE;
}
ArmDataSynchronizationBarrier ();
} while (++Tries < RPI_MBOX_MAX_TRIES);
return FALSE;
}
STATIC
EFI_STATUS
MailboxTransaction (
IN UINTN Length,
IN UINTN Channel,
OUT UINT32 *Result
)
{
if (Channel >= BCM2836_MBOX_NUM_CHANNELS) {
return EFI_INVALID_PARAMETER;
}
//
// Get rid of stale response data in the mailbox
//
if (!DrainMailbox ()) {
DEBUG ((DEBUG_ERROR, "%a: timeout waiting for mailbox to drain\n",
__FUNCTION__));
return EFI_TIMEOUT;
}
//
// Wait for the 'output register full' bit to become clear
//
if (!MailboxWaitForStatusCleared (1U << BCM2836_MBOX_STATUS_FULL)) {
DEBUG ((DEBUG_ERROR, "%a: timeout waiting for outbox to become empty\n",
__FUNCTION__));
return EFI_TIMEOUT;
}
ArmDataSynchronizationBarrier ();
//
// Start the mailbox transaction
//
MmioWrite32 (BCM2836_MBOX_BASE_ADDRESS + BCM2836_MBOX_WRITE_OFFSET,
(UINT32)((UINTN)mDmaBufferBusAddress | Channel));
ArmDataSynchronizationBarrier ();
//
// Wait for the 'input register empty' bit to clear
//
if (!MailboxWaitForStatusCleared (1U << BCM2836_MBOX_STATUS_EMPTY)) {
DEBUG ((DEBUG_ERROR, "%a: timeout waiting for inbox to become full\n",
__FUNCTION__));
return EFI_TIMEOUT;
}
//
// Read back the result
//
ArmDataSynchronizationBarrier ();
*Result = MmioRead32 (BCM2836_MBOX_BASE_ADDRESS + BCM2836_MBOX_READ_OFFSET);
ArmDataSynchronizationBarrier ();
return EFI_SUCCESS;
}
#pragma pack(1)
typedef struct {
UINT32 BufferSize;
UINT32 Response;
} RPI_FW_BUFFER_HEAD;
typedef struct {
UINT32 TagId;
UINT32 TagSize;
UINT32 TagValueSize;
} RPI_FW_TAG_HEAD;
typedef struct {
UINT32 DeviceId;
UINT32 PowerState;
} RPI_FW_POWER_STATE_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
RPI_FW_POWER_STATE_TAG TagBody;
UINT32 EndTag;
} RPI_FW_SET_POWER_STATE_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareSetPowerState (
IN UINT32 DeviceId,
IN BOOLEAN PowerState,
IN BOOLEAN Wait
)
{
RPI_FW_SET_POWER_STATE_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_SET_POWER_STATE;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->TagBody.DeviceId = DeviceId;
Cmd->TagBody.PowerState = (PowerState ? RPI_MBOX_POWER_STATE_ENABLE : 0) |
(Wait ? RPI_MBOX_POWER_STATE_WAIT : 0);
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
Status = EFI_DEVICE_ERROR;
}
if (!EFI_ERROR (Status) &&
PowerState ^ (Cmd->TagBody.PowerState & RPI_MBOX_POWER_STATE_ENABLE)) {
DEBUG ((DEBUG_ERROR, "%a: failed to %sable power for device %d\n",
__FUNCTION__, PowerState ? "en" : "dis", DeviceId));
Status = EFI_DEVICE_ERROR;
}
return Status;
}
#pragma pack()
typedef struct {
UINT32 Base;
UINT32 Size;
} RPI_FW_ARM_MEMORY_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
RPI_FW_ARM_MEMORY_TAG TagBody;
UINT32 EndTag;
} RPI_FW_GET_ARM_MEMORY_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetArmMemory (
OUT UINT32 *Base,
OUT UINT32 *Size
)
{
RPI_FW_GET_ARM_MEMORY_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_ARM_MEMSIZE;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
*Base = Cmd->TagBody.Base;
*Size = Cmd->TagBody.Size;
return EFI_SUCCESS;
}
#pragma pack()
typedef struct {
UINT8 MacAddress[6];
UINT32 Padding;
} RPI_FW_MAC_ADDR_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
RPI_FW_MAC_ADDR_TAG TagBody;
UINT32 EndTag;
} RPI_FW_GET_MAC_ADDR_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetMacAddress (
OUT UINT8 MacAddress[6]
)
{
RPI_FW_GET_MAC_ADDR_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_MAC_ADDRESS;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
CopyMem (MacAddress, Cmd->TagBody.MacAddress, sizeof (Cmd->TagBody.MacAddress));
return EFI_SUCCESS;
}
#pragma pack()
typedef struct {
UINT64 Serial;
} RPI_FW_SERIAL_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
RPI_FW_SERIAL_TAG TagBody;
UINT32 EndTag;
} RPI_FW_GET_SERIAL_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetSerial (
OUT UINT64 *Serial
)
{
RPI_FW_GET_SERIAL_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_BOARD_SERIAL;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
*Serial = Cmd->TagBody.Serial;
// Some platforms return 0 or 0x0000000010000000 for serial.
// For those, try to use the MAC address.
if ((*Serial == 0) || ((*Serial & 0xFFFFFFFF0FFFFFFFULL) == 0)) {
Status = RpiFirmwareGetMacAddress ((UINT8*) Serial);
// Convert to a more user-friendly value
*Serial = SwapBytes64 (*Serial << 16);
}
return Status;
}
#pragma pack()
typedef struct {
UINT32 Model;
} RPI_FW_MODEL_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
RPI_FW_MODEL_TAG TagBody;
UINT32 EndTag;
} RPI_FW_GET_MODEL_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetModel (
OUT UINT32 *Model
)
{
RPI_FW_GET_MODEL_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_BOARD_MODEL;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
*Model = Cmd->TagBody.Model;
return EFI_SUCCESS;
}
#pragma pack()
typedef struct {
UINT32 Revision;
} RPI_FW_MODEL_REVISION_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
RPI_FW_MODEL_REVISION_TAG TagBody;
UINT32 EndTag;
} RPI_FW_GET_REVISION_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetModelRevision (
OUT UINT32 *Revision
)
{
RPI_FW_GET_REVISION_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_BOARD_REVISION;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
*Revision = Cmd->TagBody.Revision;
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetFirmwareRevision (
OUT UINT32 *Revision
)
{
RPI_FW_GET_REVISION_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_REVISION;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
*Revision = Cmd->TagBody.Revision;
return EFI_SUCCESS;
}
STATIC
CHAR8*
EFIAPI
RpiFirmwareGetModelName (
IN INTN ModelId
)
{
UINT32 Revision;
// If a negative ModelId is passed, detect it.
if ((ModelId < 0) && (RpiFirmwareGetModelRevision (&Revision) == EFI_SUCCESS)) {
ModelId = (Revision >> 4) & 0xFF;
}
switch (ModelId) {
// www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
case 0x00:
return "Raspberry Pi Model A";
case 0x01:
return "Raspberry Pi Model B";
case 0x02:
return "Raspberry Pi Model A+";
case 0x03:
return "Raspberry Pi Model B+";
case 0x04:
return "Raspberry Pi 2 Model B";
case 0x06:
return "Raspberry Pi Compute Module 1";
case 0x08:
return "Raspberry Pi 3 Model B";
case 0x09:
return "Raspberry Pi Zero";
case 0x0A:
return "Raspberry Pi Compute Module 3";
case 0x0C:
return "Raspberry Pi Zero W";
case 0x0D:
return "Raspberry Pi 3 Model B+";
case 0x0E:
return "Raspberry Pi 3 Model A+";
case 0x10:
return "Raspberry Pi Compute Module 3+";
case 0x11:
return "Raspberry Pi 4 Model B";
default:
return "Unknown Raspberry Pi Model";
}
}
STATIC
EFI_STATUS
EFIAPI
RPiFirmwareGetModelInstalledMB (
OUT UINT32 *InstalledMB
)
{
EFI_STATUS Status;
UINT32 Revision;
Status = RpiFirmwareGetModelRevision(&Revision);
if (EFI_ERROR(Status)) {
DEBUG ((DEBUG_ERROR, "%a: Could not get the board revision: Status == %r\n",
__FUNCTION__, Status));
return EFI_DEVICE_ERROR;
}
//
// www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
// Bits [20-22] indicate the amount of memory starting with 256MB (000b)
// and doubling in size for each value (001b = 512 MB, 010b = 1GB, etc.)
//
*InstalledMB = 256 << ((Revision >> 20) & 0x07);
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
EFIAPI
RPiFirmwareGetModelFamily (
OUT UINT32 *ModelFamily
)
{
EFI_STATUS Status;
UINT32 Revision;
UINT32 ModelId;
Status = RpiFirmwareGetModelRevision(&Revision);
if (EFI_ERROR(Status)) {
DEBUG ((DEBUG_ERROR,
"%a: Could not get the board revision: Status == %r\n",
__FUNCTION__, Status));
return EFI_DEVICE_ERROR;
} else {
ModelId = (Revision >> 4) & 0xFF;
}
switch (ModelId) {
// www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
case 0x00: // Raspberry Pi Model A
case 0x01: // Raspberry Pi Model B
case 0x02: // Raspberry Pi Model A+
case 0x03: // Raspberry Pi Model B+
case 0x06: // Raspberry Pi Compute Module 1
case 0x09: // Raspberry Pi Zero
case 0x0C: // Raspberry Pi Zero W
*ModelFamily = 1;
break;
case 0x04: // Raspberry Pi 2 Model B
*ModelFamily = 2;
break;
case 0x08: // Raspberry Pi 3 Model B
case 0x0A: // Raspberry Pi Compute Module 3
case 0x0D: // Raspberry Pi 3 Model B+
case 0x0E: // Raspberry Pi 3 Model A+
case 0x10: // Raspberry Pi Compute Module 3+
*ModelFamily = 3;
break;
case 0x11: // Raspberry Pi 4 Model B
*ModelFamily = 4;
break;
default:
*ModelFamily = 0;
break;
}
if (*ModelFamily == 0) {
DEBUG ((DEBUG_ERROR,
"%a: Unknown Raspberry Pi model family : ModelId == 0x%x\n",
__FUNCTION__, ModelId));
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
STATIC
CHAR8*
EFIAPI
RpiFirmwareGetManufacturerName (
IN INTN ManufacturerId
)
{
UINT32 Revision;
// If a negative ModelId is passed, detect it.
if ((ManufacturerId < 0) && (RpiFirmwareGetModelRevision (&Revision) == EFI_SUCCESS)) {
ManufacturerId = (Revision >> 16) & 0x0F;
}
switch (ManufacturerId) {
// www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
case 0x00:
return "Sony UK";
case 0x01:
return "Egoman";
case 0x02:
case 0x04:
return "Embest";
case 0x03:
return "Sony Japan";
case 0x05:
return "Stadium";
default:
return "Unknown Manufacturer";
}
}
STATIC
CHAR8*
EFIAPI
RpiFirmwareGetCpuName (
IN INTN CpuId
)
{
UINT32 Revision;
// If a negative CpuId is passed, detect it.
if ((CpuId < 0) && (RpiFirmwareGetModelRevision (&Revision) == EFI_SUCCESS)) {
CpuId = (Revision >> 12) & 0x0F;
}
switch (CpuId) {
// www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
case 0x00:
return "BCM2835 (ARM11)";
case 0x01:
return "BCM2836 (ARM Cortex-A7)";
case 0x02:
return "BCM2837 (ARM Cortex-A53)";
case 0x03:
return "BCM2711 (ARM Cortex-A72)";
default:
return "Unknown CPU Model";
}
}
#pragma pack()
typedef struct {
UINT32 Width;
UINT32 Height;
} RPI_FW_FB_SIZE_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
RPI_FW_FB_SIZE_TAG TagBody;
UINT32 EndTag;
} RPI_FW_GET_FB_SIZE_CMD;
typedef struct {
UINT32 Depth;
} RPI_FW_FB_DEPTH_TAG;
typedef struct {
UINT32 Pitch;
} RPI_FW_FB_PITCH_TAG;
typedef struct {
UINT32 AlignmentBase;
UINT32 Size;
} RPI_FW_FB_ALLOC_TAG;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD FreeFbTag;
UINT32 EndTag;
} RPI_FW_FREE_FB_CMD;
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD PhysSizeTag;
RPI_FW_FB_SIZE_TAG PhysSize;
RPI_FW_TAG_HEAD VirtSizeTag;
RPI_FW_FB_SIZE_TAG VirtSize;
RPI_FW_TAG_HEAD DepthTag;
RPI_FW_FB_DEPTH_TAG Depth;
RPI_FW_TAG_HEAD AllocFbTag;
RPI_FW_FB_ALLOC_TAG AllocFb;
RPI_FW_TAG_HEAD PitchTag;
RPI_FW_FB_PITCH_TAG Pitch;
UINT32 EndTag;
} RPI_FW_INIT_FB_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetFbSize (
OUT UINT32 *Width,
OUT UINT32 *Height
)
{
RPI_FW_GET_FB_SIZE_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_FB_GEOMETRY;
Cmd->TagHead.TagSize = sizeof (Cmd->TagBody);
Cmd->TagHead.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
*Width = Cmd->TagBody.Width;
*Height = Cmd->TagBody.Height;
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareFreeFb (VOID)
{
RPI_FW_FREE_FB_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->FreeFbTag.TagId = RPI_MBOX_FREE_FB;
Cmd->FreeFbTag.TagSize = 0;
Cmd->FreeFbTag.TagValueSize = 0;
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareAllocFb (
IN UINT32 Width,
IN UINT32 Height,
IN UINT32 Depth,
OUT EFI_PHYSICAL_ADDRESS *FbBase,
OUT UINTN *FbSize,
OUT UINTN *Pitch
)
{
RPI_FW_INIT_FB_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
ASSERT (FbSize != NULL);
ASSERT (FbBase != NULL);
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->BufferHead.BufferSize = sizeof (*Cmd);
Cmd->BufferHead.Response = 0;
Cmd->PhysSizeTag.TagId = RPI_MBOX_SET_FB_PGEOM;
Cmd->PhysSizeTag.TagSize = sizeof (Cmd->PhysSize);
Cmd->PhysSize.Width = Width;
Cmd->PhysSize.Height = Height;
Cmd->VirtSizeTag.TagId = RPI_MBOX_SET_FB_VGEOM;
Cmd->VirtSizeTag.TagSize = sizeof (Cmd->VirtSize);
Cmd->VirtSize.Width = Width;
Cmd->VirtSize.Height = Height;
Cmd->DepthTag.TagId = RPI_MBOX_SET_FB_DEPTH;
Cmd->DepthTag.TagSize = sizeof (Cmd->Depth);
Cmd->Depth.Depth = Depth;
Cmd->AllocFbTag.TagId = RPI_MBOX_ALLOC_FB;
Cmd->AllocFbTag.TagSize = sizeof (Cmd->AllocFb);
Cmd->AllocFb.AlignmentBase = 32;
Cmd->PitchTag.TagId = RPI_MBOX_GET_FB_LINELENGTH;
Cmd->PitchTag.TagSize = sizeof (Cmd->Pitch);
Cmd->EndTag = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,
"%a: mailbox transaction error: Status == %r, Response == 0x%x\n",
__FUNCTION__, Status, Cmd->BufferHead.Response));
return EFI_DEVICE_ERROR;
}
*Pitch = Cmd->Pitch.Pitch;
*FbBase = Cmd->AllocFb.AlignmentBase - BCM2836_DMA_DEVICE_OFFSET;
*FbSize = Cmd->AllocFb.Size;
return EFI_SUCCESS;
}
#pragma pack()
typedef struct {
RPI_FW_BUFFER_HEAD BufferHead;
RPI_FW_TAG_HEAD TagHead;
UINT8 CommandLine[0];
} RPI_FW_GET_COMMAND_LINE_CMD;
#pragma pack()
STATIC
EFI_STATUS
EFIAPI
RpiFirmwareGetCommmandLine (
IN UINTN BufferSize,
OUT CHAR8 CommandLine[]
)
{
RPI_FW_GET_COMMAND_LINE_CMD *Cmd;
EFI_STATUS Status;
UINT32 Result;
if ((BufferSize % sizeof (UINT32)) != 0) {
DEBUG ((DEBUG_ERROR, "%a: BufferSize must be a multiple of 4\n",
__FUNCTION__));
return EFI_INVALID_PARAMETER;
}
if (sizeof (*Cmd) + BufferSize > EFI_PAGES_TO_SIZE (NUM_PAGES)) {
DEBUG ((DEBUG_ERROR, "%a: BufferSize exceeds size of DMA buffer\n",
__FUNCTION__));
return EFI_OUT_OF_RESOURCES;
}
if (!AcquireSpinLockOrFail (&mMailboxLock)) {
DEBUG ((DEBUG_ERROR, "%a: failed to acquire spinlock\n", __FUNCTION__));
return EFI_DEVICE_ERROR;
}
Cmd = mDmaBuffer;
ZeroMem (Cmd, sizeof (*Cmd) + BufferSize + sizeof (UINT32));
Cmd->BufferHead.BufferSize = sizeof (*Cmd) + BufferSize + sizeof (UINT32);
Cmd->BufferHead.Response = 0;
Cmd->TagHead.TagId = RPI_MBOX_GET_COMMAND_LINE;
Cmd->TagHead.TagSize = BufferSize;
Cmd->TagHead.TagValueSize = 0;
Status = MailboxTransaction (Cmd->BufferHead.BufferSize, RPI_MBOX_VC_CHANNEL, &Result);
ReleaseSpinLock (&mMailboxLock);
if (EFI_ERROR (Status) ||
Cmd->BufferHead.Response != RPI_MBOX_RESP_SUCCESS) {
DEBUG ((DEBUG_ERROR,