Fixed MTP to work with TWRP

drivers/net/ethernet/apple/Kconfig

@@ -0,0 +1,65 @@
+#
+# Apple device configuration
+#
+
+config NET_VENDOR_APPLE
+	bool "Apple devices"
+	default y
+	depends on (PPC_PMAC && PPC32) || MAC
+	---help---
+	  If you have a network (Ethernet) card belonging to this class, say Y
+	  and read the Ethernet-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about IBM devices. If you say Y, you will be asked for
+	  your specific card in the following questions.
+
+if NET_VENDOR_APPLE
+
+config MACE
+	tristate "MACE (Power Mac ethernet) support"
+	depends on PPC_PMAC && PPC32
+	select CRC32
+	---help---
+	  Power Macintoshes and clones with Ethernet built-in on the
+	  motherboard will usually use a MACE (Medium Access Control for
+	  Ethernet) interface. Say Y to include support for the MACE chip.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mace.
+
+config MACE_AAUI_PORT
+	bool "Use AAUI port instead of TP by default"
+	depends on MACE
+	---help---
+	  Some Apple machines (notably the Apple Network Server) which use the
+	  MACE ethernet chip have an Apple AUI port (small 15-pin connector),
+	  instead of an 8-pin RJ45 connector for twisted-pair ethernet.  Say
+	  Y here if you have such a machine.  If unsure, say N.
+	  The driver will default to AAUI on ANS anyway, and if you use it as
+	  a module, you can provide the port_aaui=0|1 to force the driver.
+
+config BMAC
+	tristate "BMAC (G3 ethernet) support"
+	depends on PPC_PMAC && PPC32
+	select CRC32
+	---help---
+	  Say Y for support of BMAC Ethernet interfaces. These are used on G3
+	  computers.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called bmac.
+
+config MACMACE
+	bool "Macintosh (AV) onboard MACE ethernet"
+	depends on MAC
+	select CRC32
+	---help---
+	  Support for the onboard AMD 79C940 MACE Ethernet controller used in
+	  the 660AV and 840AV Macintosh.  If you have one of these Macintoshes
+	  say Y and read the Ethernet-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+endif # NET_VENDOR_APPLE

drivers/net/ethernet/apple/Makefile

@@ -0,0 +1,7 @@
+#
+# Makefile for the Apple network device drivers.
+#
+
+obj-$(CONFIG_MACE) += mace.o
+obj-$(CONFIG_BMAC) += bmac.o
+obj-$(CONFIG_MACMACE) += macmace.o

drivers/net/ethernet/apple/bmac.h

@@ -0,0 +1,164 @@
+/*
+ * mace.h - definitions for the registers in the "Big Mac"
+ *  Ethernet controller found in PowerMac G3 models.
+ *
+ * Copyright (C) 1998 Randy Gobbel.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+/* The "Big MAC" appears to have some parts in common with the Sun "Happy Meal"
+ * (HME) controller.  See sunhme.h
+ */
+
+
+/* register offsets */
+
+/* global status and control */
+#define	XIFC		0x000   /* low-level interface control */
+#	define	TxOutputEnable	0x0001 /* output driver enable */
+#	define	XIFLoopback	0x0002 /* Loopback-mode XIF enable */
+#	define	MIILoopback	0x0004 /* Loopback-mode MII enable */
+#	define	MIILoopbackBits	0x0006
+#	define	MIIBuffDisable	0x0008 /* MII receive buffer disable */
+#	define	SQETestEnable	0x0010 /* SQE test enable */
+#	define	SQETimeWindow	0x03e0 /* SQE time window */
+#	define	XIFLanceMode	0x0010 /* Lance mode enable */
+#	define	XIFLanceIPG0	0x03e0 /* Lance mode IPG0 */
+#define	TXFIFOCSR	0x100   /* transmit FIFO control */
+#	define	TxFIFOEnable	0x0001
+#define	TXTH		0x110   /* transmit threshold */
+#	define	TxThreshold	0x0004
+#define RXFIFOCSR	0x120   /* receive FIFO control */
+#	define	RxFIFOEnable	0x0001
+#define MEMADD		0x130   /* memory address, unknown function */
+#define MEMDATAHI	0x140   /* memory data high, presently unused in driver */
+#define MEMDATALO	0x150   /* memory data low, presently unused in driver */
+#define XCVRIF		0x160   /* transceiver interface control */
+#	define	COLActiveLow	0x0002
+#	define	SerialMode	0x0004
+#	define	ClkBit		0x0008
+#	define	LinkStatus	0x0100
+#define CHIPID          0x170   /* chip ID */
+#define	MIFCSR		0x180   /* ??? */
+#define	SROMCSR		0x190   /* SROM control */
+#	define	ChipSelect	0x0001
+#	define	Clk		0x0002
+#define TXPNTR		0x1a0   /* transmit pointer */
+#define	RXPNTR		0x1b0   /* receive pointer */
+#define	STATUS		0x200   /* status--reading this clears it */
+#define	INTDISABLE	0x210   /* interrupt enable/disable control */
+/* bits below are the same in both STATUS and INTDISABLE registers */
+#	define	FrameReceived	0x00000001 /* Received a frame */
+#	define	RxFrameCntExp	0x00000002 /* Receive frame counter expired */
+#	define	RxAlignCntExp	0x00000004 /* Align-error counter expired */
+#	define	RxCRCCntExp	0x00000008 /* CRC-error counter expired */
+#	define	RxLenCntExp	0x00000010 /* Length-error counter expired */
+#	define	RxOverFlow	0x00000020 /* Receive FIFO overflow */
+#	define	RxCodeViolation	0x00000040 /* Code-violation counter expired */
+#	define	SQETestError	0x00000080 /* Test error in XIF for SQE */
+#	define	FrameSent	0x00000100 /* Transmitted a frame */
+#	define	TxUnderrun	0x00000200 /* Transmit FIFO underrun */
+#	define	TxMaxSizeError	0x00000400 /* Max-packet size error */
+#	define	TxNormalCollExp	0x00000800 /* Normal-collision counter expired */
+#	define	TxExcessCollExp	0x00001000 /* Excess-collision counter expired */
+#	define	TxLateCollExp	0x00002000 /* Late-collision counter expired */
+#	define	TxNetworkCollExp 0x00004000 /* First-collision counter expired */
+#	define	TxDeferTimerExp	0x00008000 /* Defer-timer expired */
+#	define	RxFIFOToHost	0x00010000 /* Data moved from FIFO to host */
+#	define	RxNoDescriptors	0x00020000 /* No more receive descriptors */
+#	define	RxDMAError	0x00040000 /* Error during receive DMA */
+#	define	RxDMALateErr	0x00080000 /* Receive DMA, data late */
+#	define	RxParityErr	0x00100000 /* Parity error during receive DMA */
+#	define	RxTagError	0x00200000 /* Tag error during receive DMA */
+#	define	TxEOPError	0x00400000 /* Tx descriptor did not have EOP set */
+#	define	MIFIntrEvent	0x00800000 /* MIF is signaling an interrupt */
+#	define	TxHostToFIFO	0x01000000 /* Data moved from host to FIFO  */
+#	define	TxFIFOAllSent	0x02000000 /* Transmitted all packets in FIFO */
+#	define	TxDMAError	0x04000000 /* Error during transmit DMA */
+#	define	TxDMALateError	0x08000000 /* Late error during transmit DMA */
+#	define	TxParityError	0x10000000 /* Parity error during transmit DMA */
+#	define	TxTagError	0x20000000 /* Tag error during transmit DMA */
+#	define	PIOError	0x40000000 /* PIO access got an error */
+#	define	PIOParityError	0x80000000 /* PIO access got a parity error  */
+#	define	DisableAll	0xffffffff
+#	define	EnableAll	0x00000000
+/* #	define	NormalIntEvents	~(FrameReceived | FrameSent | TxUnderrun) */
+#	define	EnableNormal	~(FrameReceived | FrameSent)
+#	define	EnableErrors	(FrameReceived | FrameSent)
+#	define	RxErrorMask	(RxFrameCntExp | RxAlignCntExp | RxCRCCntExp | \
+				 RxLenCntExp | RxOverFlow | RxCodeViolation)
+#	define	TxErrorMask	(TxUnderrun | TxMaxSizeError | TxExcessCollExp | \
+				 TxLateCollExp | TxNetworkCollExp | TxDeferTimerExp)
+
+/* transmit control */
+#define	TXRST		0x420   /* transmit reset */
+#	define	TxResetBit	0x0001
+#define	TXCFG		0x430   /* transmit configuration control*/
+#	define	TxMACEnable	0x0001 /* output driver enable */
+#	define	TxSlowMode	0x0020 /* enable slow mode */
+#	define	TxIgnoreColl	0x0040 /* ignore transmit collisions */
+#	define	TxNoFCS		0x0080 /* do not emit FCS */
+#	define	TxNoBackoff	0x0100 /* no backoff in case of collisions */
+#	define	TxFullDuplex	0x0200 /* enable full-duplex */
+#	define	TxNeverGiveUp	0x0400 /* don't give up on transmits */
+#define IPG1		0x440   /* Inter-packet gap 1 */
+#define IPG2		0x450   /* Inter-packet gap 2 */
+#define ALIMIT		0x460   /* Transmit attempt limit */
+#define SLOT		0x470   /* Transmit slot time */
+#define PALEN		0x480   /* Size of transmit preamble */
+#define PAPAT		0x490   /* Pattern for transmit preamble */
+#define TXSFD		0x4a0   /* Transmit frame delimiter */
+#define JAM		0x4b0   /* Jam size */
+#define TXMAX		0x4c0   /* Transmit max pkt size */
+#define TXMIN		0x4d0   /* Transmit min pkt size */
+#define PAREG		0x4e0   /* Count of transmit peak attempts */
+#define DCNT		0x4f0   /* Transmit defer timer */
+#define NCCNT		0x500   /* Transmit normal-collision counter */
+#define NTCNT		0x510   /* Transmit first-collision counter */
+#define EXCNT		0x520   /* Transmit excess-collision counter */
+#define LTCNT		0x530   /* Transmit late-collision counter */
+#define RSEED		0x540   /* Transmit random number seed */
+#define TXSM		0x550   /* Transmit state machine */
+
+/* receive control */
+#define RXRST		0x620   /* receive reset */
+#	define	RxResetValue	0x0000
+#define RXCFG		0x630   /* receive configuration control */
+#	define	RxMACEnable	0x0001 /* receiver overall enable */
+#	define	RxCFGReserved	0x0004
+#	define	RxPadStripEnab	0x0020 /* enable pad byte stripping */
+#	define	RxPromiscEnable	0x0040 /* turn on promiscuous mode */
+#	define	RxNoErrCheck	0x0080 /* disable receive error checking */
+#	define	RxCRCNoStrip	0x0100 /* disable auto-CRC-stripping */
+#	define	RxRejectOwnPackets 0x0200 /* don't receive our own packets */
+#	define	RxGrpPromisck	0x0400 /* enable group promiscuous mode */
+#	define	RxHashFilterEnable 0x0800 /* enable hash filter */
+#	define	RxAddrFilterEnable 0x1000 /* enable address filter */
+#define RXMAX		0x640   /* Max receive packet size */
+#define RXMIN		0x650   /* Min receive packet size */
+#define MADD2		0x660   /* our enet address, high part */
+#define MADD1		0x670   /* our enet address, middle part */
+#define MADD0		0x680   /* our enet address, low part */
+#define FRCNT		0x690   /* receive frame counter */
+#define LECNT		0x6a0   /* Receive excess length error counter */
+#define AECNT		0x6b0   /* Receive misaligned error counter */
+#define FECNT		0x6c0   /* Receive CRC error counter */
+#define RXSM		0x6d0   /* Receive state machine */
+#define RXCV		0x6e0   /* Receive code violation */
+
+#define BHASH3		0x700   /* multicast hash register */
+#define BHASH2		0x710   /* multicast hash register */
+#define BHASH1		0x720   /* multicast hash register */
+#define BHASH0		0x730   /* multicast hash register */
+
+#define AFR2		0x740   /* address filtering setup? */
+#define AFR1		0x750   /* address filtering setup? */
+#define AFR0		0x760   /* address filtering setup? */
+#define AFCR		0x770   /* address filter compare register? */
+#	define	EnableAllCompares 0x0fff
+
+/* bits in XIFC */

drivers/net/ethernet/apple/mace.h

@@ -0,0 +1,173 @@
+/*
+ * mace.h - definitions for the registers in the Am79C940 MACE
+ * (Medium Access Control for Ethernet) controller.
+ *
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#define REG(x)	volatile unsigned char x; char x ## _pad[15]
+
+struct mace {
+	REG(rcvfifo);		/* receive FIFO */
+	REG(xmtfifo);		/* transmit FIFO */
+	REG(xmtfc);		/* transmit frame control */
+	REG(xmtfs);		/* transmit frame status */
+	REG(xmtrc);		/* transmit retry count */
+	REG(rcvfc);		/* receive frame control */
+	REG(rcvfs);		/* receive frame status (4 bytes) */
+	REG(fifofc);		/* FIFO frame count */
+	REG(ir);		/* interrupt register */
+	REG(imr);		/* interrupt mask register */
+	REG(pr);		/* poll register */
+	REG(biucc);		/* bus interface unit config control */
+	REG(fifocc);		/* FIFO configuration control */
+	REG(maccc);		/* medium access control config control */
+	REG(plscc);		/* phys layer signalling config control */
+	REG(phycc);		/* physical configuration control */
+	REG(chipid_lo);		/* chip ID, lsb */
+	REG(chipid_hi);		/* chip ID, msb */
+	REG(iac);		/* internal address config */
+	REG(reg19);
+	REG(ladrf);		/* logical address filter (8 bytes) */
+	REG(padr);		/* physical address (6 bytes) */
+	REG(reg22);
+	REG(reg23);
+	REG(mpc);		/* missed packet count (clears when read) */
+	REG(reg25);
+	REG(rntpc);		/* runt packet count (clears when read) */
+	REG(rcvcc);		/* recv collision count (clears when read) */
+	REG(reg28);
+	REG(utr);		/* user test reg */
+	REG(reg30);
+	REG(reg31);
+};
+
+/* Bits in XMTFC */
+#define DRTRY		0x80	/* don't retry transmission after collision */
+#define DXMTFCS		0x08	/* don't append FCS to transmitted frame */
+#define AUTO_PAD_XMIT	0x01	/* auto-pad short packets on transmission */
+
+/* Bits in XMTFS: only valid when XMTSV is set in PR and XMTFS */
+#define XMTSV		0x80	/* transmit status (i.e. XMTFS) valid */
+#define UFLO		0x40	/* underflow - xmit fifo ran dry */
+#define LCOL		0x20	/* late collision (transmission aborted) */
+#define MORE		0x10	/* 2 or more retries needed to xmit frame */
+#define ONE		0x08	/* 1 retry needed to xmit frame */
+#define DEFER		0x04	/* MACE had to defer xmission (enet busy) */
+#define LCAR		0x02	/* loss of carrier (transmission aborted) */
+#define RTRY		0x01	/* too many retries (transmission aborted) */
+
+/* Bits in XMTRC: only valid when XMTSV is set in PR (and XMTFS) */
+#define EXDEF		0x80	/* had to defer for excessive time */
+#define RETRY_MASK	0x0f	/* number of retries (0 - 15) */
+
+/* Bits in RCVFC */
+#define LLRCV		0x08	/* low latency receive: early DMA request */
+#define M_RBAR		0x04	/* sets function of EAM/R pin */
+#define AUTO_STRIP_RCV	0x01	/* auto-strip short LLC frames on recv */
+
+/*
+ * Bits in RCVFS.  After a frame is received, four bytes of status
+ * are automatically read from this register and appended to the frame
+ * data in memory.  These are:
+ * Byte 0 and 1: message byte count and frame status
+ * Byte 2: runt packet count
+ * Byte 3: receive collision count
+ */
+#define RS_OFLO		0x8000	/* receive FIFO overflowed */
+#define RS_CLSN		0x4000	/* received frame suffered (late) collision */
+#define RS_FRAMERR	0x2000	/* framing error flag */
+#define RS_FCSERR	0x1000	/* frame had FCS error */
+#define RS_COUNT	0x0fff	/* mask for byte count field */
+
+/* Bits (fields) in FIFOFC */
+#define RCVFC_SH	4	/* receive frame count in FIFO */
+#define RCVFC_MASK	0x0f
+#define XMTFC_SH	0	/* transmit frame count in FIFO */
+#define XMTFC_MASK	0x0f
+
+/*
+ * Bits in IR and IMR.  The IR clears itself when read.
+ * Setting a bit in the IMR will disable the corresponding interrupt.
+ */
+#define JABBER		0x80	/* jabber error - 10baseT xmission too long */
+#define BABBLE		0x40	/* babble - xmitter xmitting for too long */
+#define CERR		0x20	/* collision err - no SQE test (heartbeat) */
+#define RCVCCO		0x10	/* RCVCC overflow */
+#define RNTPCO		0x08	/* RNTPC overflow */
+#define MPCO		0x04	/* MPC overflow */
+#define RCVINT		0x02	/* receive interrupt */
+#define XMTINT		0x01	/* transmitter interrupt */
+
+/* Bits in PR */
+#define XMTSV		0x80	/* XMTFS valid (same as in XMTFS) */
+#define TDTREQ		0x40	/* set when xmit fifo is requesting data */
+#define RDTREQ		0x20	/* set when recv fifo requests data xfer */
+
+/* Bits in BIUCC */
+#define BSWP		0x40	/* byte swap, i.e. big-endian bus */
+#define XMTSP_4		0x00	/* start xmitting when 4 bytes in FIFO */
+#define XMTSP_16	0x10	/* start xmitting when 16 bytes in FIFO */
+#define XMTSP_64	0x20	/* start xmitting when 64 bytes in FIFO */
+#define XMTSP_112	0x30	/* start xmitting when 112 bytes in FIFO */
+#define SWRST		0x01	/* software reset */
+
+/* Bits in FIFOCC */
+#define XMTFW_8		0x00	/* xmit fifo watermark = 8 words free */
+#define XMTFW_16	0x40	/*  16 words free */
+#define XMTFW_32	0x80	/*  32 words free */
+#define RCVFW_16	0x00	/* recv fifo watermark = 16 bytes avail */
+#define RCVFW_32	0x10	/*  32 bytes avail */
+#define RCVFW_64	0x20	/*  64 bytes avail */
+#define XMTFWU		0x08	/* xmit fifo watermark update enable */
+#define RCVFWU		0x04	/* recv fifo watermark update enable */
+#define XMTBRST		0x02	/* enable transmit burst mode */
+#define RCVBRST		0x01	/* enable receive burst mode */
+
+/* Bits in MACCC */
+#define PROM		0x80	/* promiscuous mode */
+#define DXMT2PD		0x40	/* disable xmit two-part deferral algorithm */
+#define EMBA		0x20	/* enable modified backoff algorithm */
+#define DRCVPA		0x08	/* disable receiving physical address */
+#define DRCVBC		0x04	/* disable receiving broadcasts */
+#define ENXMT		0x02	/* enable transmitter */
+#define ENRCV		0x01	/* enable receiver */
+
+/* Bits in PLSCC */
+#define XMTSEL		0x08	/* select DO+/DO- state when idle */
+#define PORTSEL_AUI	0x00	/* select AUI port */
+#define PORTSEL_10T	0x02	/* select 10Base-T port */
+#define PORTSEL_DAI	0x04	/* select DAI port */
+#define PORTSEL_GPSI	0x06	/* select GPSI port */
+#define ENPLSIO		0x01	/* enable optional PLS I/O pins */
+
+/* Bits in PHYCC */
+#define LNKFL		0x80	/* reports 10Base-T link failure */
+#define DLNKTST		0x40	/* disable 10Base-T link test */
+#define REVPOL		0x20	/* 10Base-T receiver polarity reversed */
+#define DAPC		0x10	/* disable auto receiver polarity correction */
+#define LRT		0x08	/* low receive threshold for long links */
+#define ASEL		0x04	/* auto-select AUI or 10Base-T port */
+#define RWAKE		0x02	/* remote wake function */
+#define AWAKE		0x01	/* auto wake function */
+
+/* Bits in IAC */
+#define ADDRCHG		0x80	/* request address change */
+#define PHYADDR		0x04	/* access physical address */
+#define LOGADDR		0x02	/* access multicast filter */
+
+/* Bits in UTR */
+#define RTRE		0x80	/* reserved test register enable. DON'T SET. */
+#define RTRD		0x40	/* reserved test register disable.  Sticky */
+#define RPAC		0x20	/* accept runt packets */
+#define FCOLL		0x10	/* force collision */
+#define RCVFCSE		0x08	/* receive FCS enable */
+#define LOOP_NONE	0x00	/* no loopback */
+#define LOOP_EXT	0x02	/* external loopback */
+#define LOOP_INT	0x04	/* internal loopback, excludes MENDEC */
+#define LOOP_MENDEC	0x06	/* internal loopback, includes MENDEC */

drivers/net/ethernet/apple/macmace.c

@@ -0,0 +1,789 @@
+/*
+ *	Driver for the Macintosh 68K onboard MACE controller with PSC
+ *	driven DMA. The MACE driver code is derived from mace.c. The
+ *	Mac68k theory of operation is courtesy of the MacBSD wizards.
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ *
+ *	Copyright (C) 1996 Paul Mackerras.
+ *	Copyright (C) 1998 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ *	Modified heavily by Joshua M. Thompson based on Dave Huang's NetBSD driver
+ *
+ *	Copyright (C) 2007 Finn Thain
+ *
+ *	Converted to DMA API, converted to unified driver model,
+ *	sync'd some routines with mace.c and fixed various bugs.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/crc32.h>
+#include <linux/bitrev.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/gfp.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <asm/macints.h>
+#include <asm/mac_psc.h>
+#include <asm/page.h>
+#include "mace.h"
+
+static char mac_mace_string[] = "macmace";
+
+#define N_TX_BUFF_ORDER	0
+#define N_TX_RING	(1 << N_TX_BUFF_ORDER)
+#define N_RX_BUFF_ORDER	3
+#define N_RX_RING	(1 << N_RX_BUFF_ORDER)
+
+#define TX_TIMEOUT	HZ
+
+#define MACE_BUFF_SIZE	0x800
+
+/* Chip rev needs workaround on HW & multicast addr change */
+#define BROKEN_ADDRCHG_REV	0x0941
+
+/* The MACE is simply wired down on a Mac68K box */
+
+#define MACE_BASE	(void *)(0x50F1C000)
+#define MACE_PROM	(void *)(0x50F08001)
+
+struct mace_data {
+	volatile struct mace *mace;
+	unsigned char *tx_ring;
+	dma_addr_t tx_ring_phys;
+	unsigned char *rx_ring;
+	dma_addr_t rx_ring_phys;
+	int dma_intr;
+	int rx_slot, rx_tail;
+	int tx_slot, tx_sloti, tx_count;
+	int chipid;
+	struct device *device;
+};
+
+struct mace_frame {
+	u8	rcvcnt;
+	u8	pad1;
+	u8	rcvsts;
+	u8	pad2;
+	u8	rntpc;
+	u8	pad3;
+	u8	rcvcc;
+	u8	pad4;
+	u32	pad5;
+	u32	pad6;
+	u8	data[1];
+	/* And frame continues.. */
+};
+
+#define PRIV_BYTES	sizeof(struct mace_data)
+
+static int mace_open(struct net_device *dev);
+static int mace_close(struct net_device *dev);
+static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev);
+static void mace_set_multicast(struct net_device *dev);
+static int mace_set_address(struct net_device *dev, void *addr);
+static void mace_reset(struct net_device *dev);
+static irqreturn_t mace_interrupt(int irq, void *dev_id);
+static irqreturn_t mace_dma_intr(int irq, void *dev_id);
+static void mace_tx_timeout(struct net_device *dev);
+static void __mace_set_address(struct net_device *dev, void *addr);
+
+/*
+ * Load a receive DMA channel with a base address and ring length
+ */
+
+static void mace_load_rxdma_base(struct net_device *dev, int set)
+{
+	struct mace_data *mp = netdev_priv(dev);
+
+	psc_write_word(PSC_ENETRD_CMD + set, 0x0100);
+	psc_write_long(PSC_ENETRD_ADDR + set, (u32) mp->rx_ring_phys);
+	psc_write_long(PSC_ENETRD_LEN + set, N_RX_RING);
+	psc_write_word(PSC_ENETRD_CMD + set, 0x9800);
+	mp->rx_tail = 0;
+}
+
+/*
+ * Reset the receive DMA subsystem
+ */
+
+static void mace_rxdma_reset(struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mace = mp->mace;
+	u8 maccc = mace->maccc;
+
+	mace->maccc = maccc & ~ENRCV;
+
+	psc_write_word(PSC_ENETRD_CTL, 0x8800);
+	mace_load_rxdma_base(dev, 0x00);
+	psc_write_word(PSC_ENETRD_CTL, 0x0400);
+
+	psc_write_word(PSC_ENETRD_CTL, 0x8800);
+	mace_load_rxdma_base(dev, 0x10);
+	psc_write_word(PSC_ENETRD_CTL, 0x0400);
+
+	mace->maccc = maccc;
+	mp->rx_slot = 0;
+
+	psc_write_word(PSC_ENETRD_CMD + PSC_SET0, 0x9800);
+	psc_write_word(PSC_ENETRD_CMD + PSC_SET1, 0x9800);
+}
+
+/*
+ * Reset the transmit DMA subsystem
+ */
+
+static void mace_txdma_reset(struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mace = mp->mace;
+	u8 maccc;
+
+	psc_write_word(PSC_ENETWR_CTL, 0x8800);
+
+	maccc = mace->maccc;
+	mace->maccc = maccc & ~ENXMT;
+
+	mp->tx_slot = mp->tx_sloti = 0;
+	mp->tx_count = N_TX_RING;
+
+	psc_write_word(PSC_ENETWR_CTL, 0x0400);
+	mace->maccc = maccc;
+}
+
+/*
+ * Disable DMA
+ */
+
+static void mace_dma_off(struct net_device *dev)
+{
+	psc_write_word(PSC_ENETRD_CTL, 0x8800);
+	psc_write_word(PSC_ENETRD_CTL, 0x1000);
+	psc_write_word(PSC_ENETRD_CMD + PSC_SET0, 0x1100);
+	psc_write_word(PSC_ENETRD_CMD + PSC_SET1, 0x1100);
+
+	psc_write_word(PSC_ENETWR_CTL, 0x8800);
+	psc_write_word(PSC_ENETWR_CTL, 0x1000);
+	psc_write_word(PSC_ENETWR_CMD + PSC_SET0, 0x1100);
+	psc_write_word(PSC_ENETWR_CMD + PSC_SET1, 0x1100);
+}
+
+static const struct net_device_ops mace_netdev_ops = {
+	.ndo_open		= mace_open,
+	.ndo_stop		= mace_close,
+	.ndo_start_xmit		= mace_xmit_start,
+	.ndo_tx_timeout		= mace_tx_timeout,
+	.ndo_set_rx_mode	= mace_set_multicast,
+	.ndo_set_mac_address	= mace_set_address,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+/*
+ * Not really much of a probe. The hardware table tells us if this
+ * model of Macintrash has a MACE (AV macintoshes)
+ */
+
+static int mace_probe(struct platform_device *pdev)
+{
+	int j;
+	struct mace_data *mp;
+	unsigned char *addr;
+	struct net_device *dev;
+	unsigned char checksum = 0;
+	int err;
+
+	dev = alloc_etherdev(PRIV_BYTES);
+	if (!dev)
+		return -ENOMEM;
+
+	mp = netdev_priv(dev);
+
+	mp->device = &pdev->dev;
+	platform_set_drvdata(pdev, dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	dev->base_addr = (u32)MACE_BASE;
+	mp->mace = MACE_BASE;
+
+	dev->irq = IRQ_MAC_MACE;
+	mp->dma_intr = IRQ_MAC_MACE_DMA;
+
+	mp->chipid = mp->mace->chipid_hi << 8 | mp->mace->chipid_lo;
+
+	/*
+	 * The PROM contains 8 bytes which total 0xFF when XOR'd
+	 * together. Due to the usual peculiar apple brain damage
+	 * the bytes are spaced out in a strange boundary and the
+	 * bits are reversed.
+	 */
+
+	addr = MACE_PROM;
+
+	for (j = 0; j < 6; ++j) {
+		u8 v = bitrev8(addr[j<<4]);
+		checksum ^= v;
+		dev->dev_addr[j] = v;
+	}
+	for (; j < 8; ++j) {
+		checksum ^= bitrev8(addr[j<<4]);
+	}
+
+	if (checksum != 0xFF) {
+		free_netdev(dev);
+		return -ENODEV;
+	}
+
+	dev->netdev_ops		= &mace_netdev_ops;
+	dev->watchdog_timeo	= TX_TIMEOUT;
+
+	printk(KERN_INFO "%s: 68K MACE, hardware address %pM\n",
+	       dev->name, dev->dev_addr);
+
+	err = register_netdev(dev);
+	if (!err)
+		return 0;
+
+	free_netdev(dev);
+	return err;
+}
+
+/*
+ * Reset the chip.
+ */
+
+static void mace_reset(struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+	int i;
+
+	/* soft-reset the chip */
+	i = 200;
+	while (--i) {
+		mb->biucc = SWRST;
+		if (mb->biucc & SWRST) {
+			udelay(10);
+			continue;
+		}
+		break;
+	}
+	if (!i) {
+		printk(KERN_ERR "macmace: cannot reset chip!\n");
+		return;
+	}
+
+	mb->maccc = 0;	/* turn off tx, rx */
+	mb->imr = 0xFF;	/* disable all intrs for now */
+	i = mb->ir;
+
+	mb->biucc = XMTSP_64;
+	mb->utr = RTRD;
+	mb->fifocc = XMTFW_8 | RCVFW_64 | XMTFWU | RCVFWU;
+
+	mb->xmtfc = AUTO_PAD_XMIT; /* auto-pad short frames */
+	mb->rcvfc = 0;
+
+	/* load up the hardware address */
+	__mace_set_address(dev, dev->dev_addr);
+
+	/* clear the multicast filter */
+	if (mp->chipid == BROKEN_ADDRCHG_REV)
+		mb->iac = LOGADDR;
+	else {
+		mb->iac = ADDRCHG | LOGADDR;
+		while ((mb->iac & ADDRCHG) != 0)
+			;
+	}
+	for (i = 0; i < 8; ++i)
+		mb->ladrf = 0;
+
+	/* done changing address */
+	if (mp->chipid != BROKEN_ADDRCHG_REV)
+		mb->iac = 0;
+
+	mb->plscc = PORTSEL_AUI;
+}
+
+/*
+ * Load the address on a mace controller.
+ */
+
+static void __mace_set_address(struct net_device *dev, void *addr)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+	unsigned char *p = addr;
+	int i;
+
+	/* load up the hardware address */
+	if (mp->chipid == BROKEN_ADDRCHG_REV)
+		mb->iac = PHYADDR;
+	else {
+		mb->iac = ADDRCHG | PHYADDR;
+		while ((mb->iac & ADDRCHG) != 0)
+			;
+	}
+	for (i = 0; i < 6; ++i)
+		mb->padr = dev->dev_addr[i] = p[i];
+	if (mp->chipid != BROKEN_ADDRCHG_REV)
+		mb->iac = 0;
+}
+
+static int mace_set_address(struct net_device *dev, void *addr)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+	unsigned long flags;
+	u8 maccc;
+
+	local_irq_save(flags);
+
+	maccc = mb->maccc;
+
+	__mace_set_address(dev, addr);
+
+	mb->maccc = maccc;
+
+	local_irq_restore(flags);
+
+	return 0;
+}
+
+/*
+ * Open the Macintosh MACE. Most of this is playing with the DMA
+ * engine. The ethernet chip is quite friendly.
+ */
+
+static int mace_open(struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+
+	/* reset the chip */
+	mace_reset(dev);
+
+	if (request_irq(dev->irq, mace_interrupt, 0, dev->name, dev)) {
+		printk(KERN_ERR "%s: can't get irq %d\n", dev->name, dev->irq);
+		return -EAGAIN;
+	}
+	if (request_irq(mp->dma_intr, mace_dma_intr, 0, dev->name, dev)) {
+		printk(KERN_ERR "%s: can't get irq %d\n", dev->name, mp->dma_intr);
+		free_irq(dev->irq, dev);
+		return -EAGAIN;
+	}
+
+	/* Allocate the DMA ring buffers */
+
+	mp->tx_ring = dma_alloc_coherent(mp->device,
+					 N_TX_RING * MACE_BUFF_SIZE,
+					 &mp->tx_ring_phys, GFP_KERNEL);
+	if (mp->tx_ring == NULL)
+		goto out1;
+
+	mp->rx_ring = dma_alloc_coherent(mp->device,
+					 N_RX_RING * MACE_BUFF_SIZE,
+					 &mp->rx_ring_phys, GFP_KERNEL);
+	if (mp->rx_ring == NULL)
+		goto out2;
+
+	mace_dma_off(dev);
+
+	/* Not sure what these do */
+
+	psc_write_word(PSC_ENETWR_CTL, 0x9000);
+	psc_write_word(PSC_ENETRD_CTL, 0x9000);
+	psc_write_word(PSC_ENETWR_CTL, 0x0400);
+	psc_write_word(PSC_ENETRD_CTL, 0x0400);
+
+	mace_rxdma_reset(dev);
+	mace_txdma_reset(dev);
+
+	/* turn it on! */
+	mb->maccc = ENXMT | ENRCV;
+	/* enable all interrupts except receive interrupts */
+	mb->imr = RCVINT;
+	return 0;
+
+out2:
+	dma_free_coherent(mp->device, N_TX_RING * MACE_BUFF_SIZE,
+	                  mp->tx_ring, mp->tx_ring_phys);
+out1:
+	free_irq(dev->irq, dev);
+	free_irq(mp->dma_intr, dev);
+	return -ENOMEM;
+}
+
+/*
+ * Shut down the mace and its interrupt channel
+ */
+
+static int mace_close(struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+
+	mb->maccc = 0;		/* disable rx and tx	 */
+	mb->imr = 0xFF;		/* disable all irqs	 */
+	mace_dma_off(dev);	/* disable rx and tx dma */
+
+	return 0;
+}
+
+/*
+ * Transmit a frame
+ */
+
+static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	unsigned long flags;
+
+	/* Stop the queue since there's only the one buffer */
+
+	local_irq_save(flags);
+	netif_stop_queue(dev);
+	if (!mp->tx_count) {
+		printk(KERN_ERR "macmace: tx queue running but no free buffers.\n");
+		local_irq_restore(flags);
+		return NETDEV_TX_BUSY;
+	}
+	mp->tx_count--;
+	local_irq_restore(flags);
+
+	dev->stats.tx_packets++;
+	dev->stats.tx_bytes += skb->len;
+
+	/* We need to copy into our xmit buffer to take care of alignment and caching issues */
+	skb_copy_from_linear_data(skb, mp->tx_ring, skb->len);
+
+	/* load the Tx DMA and fire it off */
+
+	psc_write_long(PSC_ENETWR_ADDR + mp->tx_slot, (u32)  mp->tx_ring_phys);
+	psc_write_long(PSC_ENETWR_LEN + mp->tx_slot, skb->len);
+	psc_write_word(PSC_ENETWR_CMD + mp->tx_slot, 0x9800);
+
+	mp->tx_slot ^= 0x10;
+
+	dev_kfree_skb(skb);
+
+	return NETDEV_TX_OK;
+}
+
+static void mace_set_multicast(struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+	int i;
+	u32 crc;
+	u8 maccc;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	maccc = mb->maccc;
+	mb->maccc &= ~PROM;
+
+	if (dev->flags & IFF_PROMISC) {
+		mb->maccc |= PROM;
+	} else {
+		unsigned char multicast_filter[8];
+		struct netdev_hw_addr *ha;
+
+		if (dev->flags & IFF_ALLMULTI) {
+			for (i = 0; i < 8; i++) {
+				multicast_filter[i] = 0xFF;
+			}
+		} else {
+			for (i = 0; i < 8; i++)
+				multicast_filter[i] = 0;
+			netdev_for_each_mc_addr(ha, dev) {
+				crc = ether_crc_le(6, ha->addr);
+				/* bit number in multicast_filter */
+				i = crc >> 26;
+				multicast_filter[i >> 3] |= 1 << (i & 7);
+			}
+		}
+
+		if (mp->chipid == BROKEN_ADDRCHG_REV)
+			mb->iac = LOGADDR;
+		else {
+			mb->iac = ADDRCHG | LOGADDR;
+			while ((mb->iac & ADDRCHG) != 0)
+				;
+		}
+		for (i = 0; i < 8; ++i)
+			mb->ladrf = multicast_filter[i];
+		if (mp->chipid != BROKEN_ADDRCHG_REV)
+			mb->iac = 0;
+	}
+
+	mb->maccc = maccc;
+	local_irq_restore(flags);
+}
+
+static void mace_handle_misc_intrs(struct net_device *dev, int intr)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+	static int mace_babbles, mace_jabbers;
+
+	if (intr & MPCO)
+		dev->stats.rx_missed_errors += 256;
+	dev->stats.rx_missed_errors += mb->mpc;   /* reading clears it */
+	if (intr & RNTPCO)
+		dev->stats.rx_length_errors += 256;
+	dev->stats.rx_length_errors += mb->rntpc; /* reading clears it */
+	if (intr & CERR)
+		++dev->stats.tx_heartbeat_errors;
+	if (intr & BABBLE)
+		if (mace_babbles++ < 4)
+			printk(KERN_DEBUG "macmace: babbling transmitter\n");
+	if (intr & JABBER)
+		if (mace_jabbers++ < 4)
+			printk(KERN_DEBUG "macmace: jabbering transceiver\n");
+}
+
+static irqreturn_t mace_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+	int intr, fs;
+	unsigned long flags;
+
+	/* don't want the dma interrupt handler to fire */
+	local_irq_save(flags);
+
+	intr = mb->ir; /* read interrupt register */
+	mace_handle_misc_intrs(dev, intr);
+
+	if (intr & XMTINT) {
+		fs = mb->xmtfs;
+		if ((fs & XMTSV) == 0) {
+			printk(KERN_ERR "macmace: xmtfs not valid! (fs=%x)\n", fs);
+			mace_reset(dev);
+			/*
+			 * XXX mace likes to hang the machine after a xmtfs error.
+			 * This is hard to reproduce, reseting *may* help
+			 */
+		}
+		/* dma should have finished */
+		if (!mp->tx_count) {
+			printk(KERN_DEBUG "macmace: tx ring ran out? (fs=%x)\n", fs);
+		}
+		/* Update stats */
+		if (fs & (UFLO|LCOL|LCAR|RTRY)) {
+			++dev->stats.tx_errors;
+			if (fs & LCAR)
+				++dev->stats.tx_carrier_errors;
+			else if (fs & (UFLO|LCOL|RTRY)) {
+				++dev->stats.tx_aborted_errors;
+				if (mb->xmtfs & UFLO) {
+					printk(KERN_ERR "%s: DMA underrun.\n", dev->name);
+					dev->stats.tx_fifo_errors++;
+					mace_txdma_reset(dev);
+				}
+			}
+		}
+	}
+
+	if (mp->tx_count)
+		netif_wake_queue(dev);
+
+	local_irq_restore(flags);
+
+	return IRQ_HANDLED;
+}
+
+static void mace_tx_timeout(struct net_device *dev)
+{
+	struct mace_data *mp = netdev_priv(dev);
+	volatile struct mace *mb = mp->mace;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	/* turn off both tx and rx and reset the chip */
+	mb->maccc = 0;
+	printk(KERN_ERR "macmace: transmit timeout - resetting\n");
+	mace_txdma_reset(dev);
+	mace_reset(dev);
+
+	/* restart rx dma */
+	mace_rxdma_reset(dev);
+
+	mp->tx_count = N_TX_RING;
+	netif_wake_queue(dev);
+
+	/* turn it on! */
+	mb->maccc = ENXMT | ENRCV;
+	/* enable all interrupts except receive interrupts */
+	mb->imr = RCVINT;
+
+	local_irq_restore(flags);
+}
+
+/*
+ * Handle a newly arrived frame
+ */
+
+static void mace_dma_rx_frame(struct net_device *dev, struct mace_frame *mf)
+{
+	struct sk_buff *skb;
+	unsigned int frame_status = mf->rcvsts;
+
+	if (frame_status & (RS_OFLO | RS_CLSN | RS_FRAMERR | RS_FCSERR)) {
+		dev->stats.rx_errors++;
+		if (frame_status & RS_OFLO) {
+			printk(KERN_DEBUG "%s: fifo overflow.\n", dev->name);
+			dev->stats.rx_fifo_errors++;
+		}
+		if (frame_status & RS_CLSN)
+			dev->stats.collisions++;
+		if (frame_status & RS_FRAMERR)
+			dev->stats.rx_frame_errors++;
+		if (frame_status & RS_FCSERR)
+			dev->stats.rx_crc_errors++;
+	} else {
+		unsigned int frame_length = mf->rcvcnt + ((frame_status & 0x0F) << 8 );
+
+		skb = netdev_alloc_skb(dev, frame_length + 2);
+		if (!skb) {
+			dev->stats.rx_dropped++;
+			return;
+		}
+		skb_reserve(skb, 2);
+		memcpy(skb_put(skb, frame_length), mf->data, frame_length);
+
+		skb->protocol = eth_type_trans(skb, dev);
+		netif_rx(skb);
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += frame_length;
+	}
+}
+
+/*
+ * The PSC has passed us a DMA interrupt event.
+ */
+
+static irqreturn_t mace_dma_intr(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct mace_data *mp = netdev_priv(dev);
+	int left, head;
+	u16 status;
+	u32 baka;
+
+	/* Not sure what this does */
+
+	while ((baka = psc_read_long(PSC_MYSTERY)) != psc_read_long(PSC_MYSTERY));
+	if (!(baka & 0x60000000)) return IRQ_NONE;
+
+	/*
+	 * Process the read queue
+	 */
+
+	status = psc_read_word(PSC_ENETRD_CTL);
+
+	if (status & 0x2000) {
+		mace_rxdma_reset(dev);
+	} else if (status & 0x0100) {
+		psc_write_word(PSC_ENETRD_CMD + mp->rx_slot, 0x1100);
+
+		left = psc_read_long(PSC_ENETRD_LEN + mp->rx_slot);
+		head = N_RX_RING - left;
+
+		/* Loop through the ring buffer and process new packages */
+
+		while (mp->rx_tail < head) {
+			mace_dma_rx_frame(dev, (struct mace_frame*) (mp->rx_ring
+				+ (mp->rx_tail * MACE_BUFF_SIZE)));
+			mp->rx_tail++;
+		}
+
+		/* If we're out of buffers in this ring then switch to */
+		/* the other set, otherwise just reactivate this one.  */
+
+		if (!left) {
+			mace_load_rxdma_base(dev, mp->rx_slot);
+			mp->rx_slot ^= 0x10;
+		} else {
+			psc_write_word(PSC_ENETRD_CMD + mp->rx_slot, 0x9800);
+		}
+	}
+
+	/*
+	 * Process the write queue
+	 */
+
+	status = psc_read_word(PSC_ENETWR_CTL);
+
+	if (status & 0x2000) {
+		mace_txdma_reset(dev);
+	} else if (status & 0x0100) {
+		psc_write_word(PSC_ENETWR_CMD + mp->tx_sloti, 0x0100);
+		mp->tx_sloti ^= 0x10;
+		mp->tx_count++;
+	}
+	return IRQ_HANDLED;
+}
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Macintosh MACE ethernet driver");
+MODULE_ALIAS("platform:macmace");
+
+static int mac_mace_device_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+	struct mace_data *mp = netdev_priv(dev);
+
+	unregister_netdev(dev);
+
+	free_irq(dev->irq, dev);
+	free_irq(IRQ_MAC_MACE_DMA, dev);
+
+	dma_free_coherent(mp->device, N_RX_RING * MACE_BUFF_SIZE,
+	                  mp->rx_ring, mp->rx_ring_phys);
+	dma_free_coherent(mp->device, N_TX_RING * MACE_BUFF_SIZE,
+	                  mp->tx_ring, mp->tx_ring_phys);
+
+	free_netdev(dev);
+
+	return 0;
+}
+
+static struct platform_driver mac_mace_driver = {
+	.probe  = mace_probe,
+	.remove = mac_mace_device_remove,
+	.driver	= {
+		.name	= mac_mace_string,
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init mac_mace_init_module(void)
+{
+	if (!MACH_IS_MAC)
+		return -ENODEV;
+
+	return platform_driver_register(&mac_mace_driver);
+}
+
+static void __exit mac_mace_cleanup_module(void)
+{
+	platform_driver_unregister(&mac_mace_driver);
+}
+
+module_init(mac_mace_init_module);
+module_exit(mac_mace_cleanup_module);