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59d8a77df6
These adapters were common in DEC Alpha boxes and they are really rare nowadays. The 21140 chip is emulated in Connectix / Microsoft Virtual PC and Hyper-V Gen 1 VM. This is an experimental driver, not yet tested on real hardware. CORE-8724
137 lines
3 KiB
C
137 lines
3 KiB
C
/*
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* PROJECT: ReactOS DC21x4 Driver
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: 21140 media support code
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* COPYRIGHT: Copyright 2023 Dmitry Borisov <di.sean@protonmail.com>
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*/
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/* INCLUDES *******************************************************************/
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#include "dc21x4.h"
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#include <debug.h>
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/* FUNCTIONS ******************************************************************/
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static
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BOOLEAN
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MediaGprCheckLink(
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_In_ PDC21X4_ADAPTER Adapter)
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{
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ULONG GpioData;
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PDC_MEDIA Media;
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Media = &Adapter->Media[Adapter->MediaNumber];
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/* No media activity indicator */
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if (Media->LinkMask == 0)
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{
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TRACE("No activity indicator\n");
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/* Assume we have a link */
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if (MEDIA_IS_FIXED(Adapter))
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return TRUE;
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return FALSE;
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}
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GpioData = DC_READ(Adapter, DcCsr12_Gpio);
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TRACE("CSR12 %08lx\n", GpioData);
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/* This media supports link indication via GPIO pins */
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return !!((GpioData & Media->LinkMask) ^ Media->Polarity);
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}
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static
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ULONG
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MediaGprNextMedia(
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_In_ PDC21X4_ADAPTER Adapter)
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{
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ULONG i;
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/* No half-duplex media in the media list */
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if (!(Adapter->MediaBitmap & ~MEDIA_FD_MASK))
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{
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return Adapter->MediaNumber;
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}
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/* Find the next half-duplex media */
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i = Adapter->MediaNumber;
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while (TRUE)
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{
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/* We have reached the end of the media list, try the first media */
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if (i == 0)
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{
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_BitScanReverse(&i, Adapter->MediaBitmap);
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}
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else
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{
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--i;
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}
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if ((Adapter->MediaBitmap & (1 << i)) && !MEDIA_IS_FD(i))
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{
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return i;
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}
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}
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}
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VOID
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NTAPI
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MediaMonitor21140Dpc(
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_In_ PVOID SystemSpecific1,
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_In_ PVOID FunctionContext,
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_In_ PVOID SystemSpecific2,
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_In_ PVOID SystemSpecific3)
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{
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PDC21X4_ADAPTER Adapter = FunctionContext;
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ULONG DelayMs, MediaNumber;
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BOOLEAN LinkUp;
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UNREFERENCED_PARAMETER(SystemSpecific1);
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UNREFERENCED_PARAMETER(SystemSpecific2);
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UNREFERENCED_PARAMETER(SystemSpecific3);
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if (!(Adapter->Flags & DC_ACTIVE))
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return;
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NdisDprAcquireSpinLock(&Adapter->ModeLock);
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if (Adapter->MediaNumber == MEDIA_MII)
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{
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LinkUp = MediaMiiCheckLink(Adapter);
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DelayMs = 5000;
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}
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else
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{
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LinkUp = MediaGprCheckLink(Adapter);
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/* This media is unconnected, try the next media */
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if (!LinkUp && !MEDIA_IS_FIXED(Adapter))
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{
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MediaNumber = MediaGprNextMedia(Adapter);
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if (Adapter->MediaNumber != MediaNumber)
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{
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Adapter->MediaNumber = MediaNumber;
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MediaGprSelect(Adapter);
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}
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DelayMs = 3000;
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}
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else
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{
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/* If we are forcing media, then we need to poll the media less frequently */
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DelayMs = 5000;
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}
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}
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MediaIndicateConnect(Adapter, LinkUp);
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NdisDprReleaseSpinLock(&Adapter->ModeLock);
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NdisMSetTimer(&Adapter->MediaMonitorTimer, DelayMs);
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}
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