[NET] GT96100: Delete bitrotting ethernet driver

Code for the EV96100 evaluation board hasn't compiled since at least
November 15, 2003, so it is being deleted as of 2.6.18 due to lack of
a user base.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

4 files changed, 0 insertions, 1921 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index c49a1cc76c2..63154774c25 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -438,12 +438,6 @@ config MIPS_JAZZ_SONIC
 	  This is the driver for the onboard card of MIPS Magnum 4000,
 	  Acer PICA, Olivetti M700-10 and a few other identical OEM systems.
 
-config MIPS_GT96100ETH
-	bool "MIPS GT96100 Ethernet support"
-	depends on NET_ETHERNET && MIPS_GT96100
-	help
-	  Say Y here to support the Ethernet subsystem on your GT96100 card.
-
 config MIPS_AU1X00_ENET
 	bool "MIPS AU1000 Ethernet support"
 	depends on NET_ETHERNET && SOC_AU1X00
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 0f329e56345..f270bc49e57 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -170,7 +170,6 @@ obj-$(CONFIG_HPLANCE) += hplance.o 7990.o
 obj-$(CONFIG_MVME147_NET) += mvme147.o 7990.o
 obj-$(CONFIG_EQUALIZER) += eql.o
 obj-$(CONFIG_MIPS_JAZZ_SONIC) += jazzsonic.o
-obj-$(CONFIG_MIPS_GT96100ETH) += gt96100eth.o
 obj-$(CONFIG_MIPS_AU1X00_ENET) += au1000_eth.o
 obj-$(CONFIG_MIPS_SIM_NET) += mipsnet.o
 obj-$(CONFIG_SGI_IOC3_ETH) += ioc3-eth.o
diff --git a/drivers/net/gt96100eth.c b/drivers/net/gt96100eth.c
deleted file mode 100644
index 785c5bf4c6e..00000000000
--- a/drivers/net/gt96100eth.c
+++ /dev/null
@@ -1,1568 +0,0 @@
-/*
- * Copyright 2000, 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- *         	stevel@mvista.com or source@mvista.com
- *
- *  This program is free software; you can distribute it and/or modify it
- *  under the terms of the GNU General Public License (Version 2) as
- *  published by the Free Software Foundation.
- *
- *  This program is distributed in the hope it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Ethernet driver for the MIPS GT96100 Advanced Communication Controller.
- *
- *  Revision history
- *
- *    11.11.2001  Moved to 2.4.14, ppopov@mvista.com.  Modified driver to add
- *                proper gt96100A support.
- *    12.05.2001  Moved eth port 0 to irq 3 (mapped to GT_SERINT0 on EV96100A)
- *                in order for both ports to work. Also cleaned up boot
- *                option support (mac address string parsing), fleshed out
- *                gt96100_cleanup_module(), and other general code cleanups
- *                <stevel@mvista.com>.
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/errno.h>
-#include <linux/in.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/bitops.h>
-
-#include <asm/irq.h>
-#include <asm/io.h>
-
-#define DESC_BE 1
-#define DESC_DATA_BE 1
-
-#define GT96100_DEBUG 2
-
-#include "gt96100eth.h"
-
-// prototypes
-static void* dmaalloc(size_t size, dma_addr_t *dma_handle);
-static void dmafree(size_t size, void *vaddr);
-static void gt96100_delay(int msec);
-static int gt96100_add_hash_entry(struct net_device *dev,
-				  unsigned char* addr);
-static void read_mib_counters(struct gt96100_private *gp);
-static int read_MII(int phy_addr, u32 reg);
-static int write_MII(int phy_addr, u32 reg, u16 data);
-static int gt96100_init_module(void);
-static void gt96100_cleanup_module(void);
-static void dump_MII(int dbg_lvl, struct net_device *dev);
-static void dump_tx_desc(int dbg_lvl, struct net_device *dev, int i);
-static void dump_rx_desc(int dbg_lvl, struct net_device *dev, int i);
-static void dump_skb(int dbg_lvl, struct net_device *dev,
-		     struct sk_buff *skb);
-static void update_stats(struct gt96100_private *gp);
-static void abort(struct net_device *dev, u32 abort_bits);
-static void hard_stop(struct net_device *dev);
-static void enable_ether_irq(struct net_device *dev);
-static void disable_ether_irq(struct net_device *dev);
-static int gt96100_probe1(struct pci_dev *pci, int port_num);
-static void reset_tx(struct net_device *dev);
-static void reset_rx(struct net_device *dev);
-static int gt96100_check_tx_consistent(struct gt96100_private *gp);
-static int gt96100_init(struct net_device *dev);
-static int gt96100_open(struct net_device *dev);
-static int gt96100_close(struct net_device *dev);
-static int gt96100_tx(struct sk_buff *skb, struct net_device *dev);
-static int gt96100_rx(struct net_device *dev, u32 status);
-static irqreturn_t gt96100_interrupt(int irq, void *dev_id, struct pt_regs *regs);
-static void gt96100_tx_timeout(struct net_device *dev);
-static void gt96100_set_rx_mode(struct net_device *dev);
-static struct net_device_stats* gt96100_get_stats(struct net_device *dev);
-
-extern char * __init prom_getcmdline(void);
-
-static int max_interrupt_work = 32;
-
-#define nibswap(x) ((((x) >> 4) & 0x0f) | (((x) << 4) & 0xf0))
-
-#define RUN_AT(x) (jiffies + (x))
-
-// For reading/writing 32-bit words and half-words from/to DMA memory
-#ifdef DESC_BE
-#define cpu_to_dma32 cpu_to_be32
-#define dma32_to_cpu be32_to_cpu
-#define cpu_to_dma16 cpu_to_be16
-#define dma16_to_cpu be16_to_cpu
-#else
-#define cpu_to_dma32 cpu_to_le32
-#define dma32_to_cpu le32_to_cpu
-#define cpu_to_dma16 cpu_to_le16
-#define dma16_to_cpu le16_to_cpu
-#endif
-
-static char mac0[18] = "00.02.03.04.05.06";
-static char mac1[18] = "00.01.02.03.04.05";
-module_param_string(mac0, mac0, 18, 0);
-module_param_string(mac1, mac0, 18, 0);
-MODULE_PARM_DESC(mac0, "MAC address for GT96100 ethernet port 0");
-MODULE_PARM_DESC(mac1, "MAC address for GT96100 ethernet port 1");
-
-/*
- * Info for the GT96100 ethernet controller's ports.
- */
-static struct gt96100_if_t {
-	struct net_device *dev;
-	unsigned int  iobase;   // IO Base address of this port
-	int           irq;      // IRQ number of this port
-	char         *mac_str;
-} gt96100_iflist[NUM_INTERFACES] = {
-	{
-		NULL,
-		GT96100_ETH0_BASE, GT96100_ETHER0_IRQ,
-		mac0
-	},
-	{
-		NULL,
-		GT96100_ETH1_BASE, GT96100_ETHER1_IRQ,
-		mac1
-	}
-};
-
-static inline const char*
-chip_name(int chip_rev)
-{
-	switch (chip_rev) {
-	case REV_GT96100:
-		return "GT96100";
-	case REV_GT96100A_1:
-	case REV_GT96100A:
-		return "GT96100A";
-	default:
-		return "Unknown GT96100";
-	}
-}
-
-/*
-  DMA memory allocation, derived from pci_alloc_consistent.
-*/
-static void * dmaalloc(size_t size, dma_addr_t *dma_handle)
-{
-	void *ret;
-
-	ret = (void *)__get_free_pages(GFP_ATOMIC | GFP_DMA, get_order(size));
-
-	if (ret != NULL) {
-		dma_cache_inv((unsigned long)ret, size);
-		if (dma_handle != NULL)
-			*dma_handle = virt_to_phys(ret);
-
-		/* bump virtual address up to non-cached area */
-		ret = (void*)KSEG1ADDR(ret);
-	}
-
-	return ret;
-}
-
-static void dmafree(size_t size, void *vaddr)
-{
-	vaddr = (void*)KSEG0ADDR(vaddr);
-	free_pages((unsigned long)vaddr, get_order(size));
-}
-
-static void gt96100_delay(int ms)
-{
-	if (in_interrupt())
-		return;
-	else
-		msleep_interruptible(ms);
-}
-
-static int
-parse_mac_addr(struct net_device *dev, char* macstr)
-{
-	int i, j;
-	unsigned char result, value;
-
-	for (i=0; i<6; i++) {
-		result = 0;
-		if (i != 5 && *(macstr+2) != '.') {
-			err(__FILE__ "invalid mac address format: %d %c\n",
-			    i, *(macstr+2));
-			return -EINVAL;
-		}
-
-		for (j=0; j<2; j++) {
-			if (isxdigit(*macstr) &&
-			    (value = isdigit(*macstr) ? *macstr-'0' :
-			     toupper(*macstr)-'A'+10) < 16) {
-				result = result*16 + value;
-				macstr++;
-			} else {
-				err(__FILE__ "invalid mac address "
-				    "character: %c\n", *macstr);
-				return -EINVAL;
-			}
-		}
-
-		macstr++; // step over '.'
-		dev->dev_addr[i] = result;
-	}
-
-	return 0;
-}
-
-
-static int
-read_MII(int phy_addr, u32 reg)
-{
-	int timedout = 20;
-	u32 smir = smirOpCode | (phy_addr << smirPhyAdBit) |
-		(reg << smirRegAdBit);
-
-	// wait for last operation to complete
-	while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) {
-		// snooze for 1 msec and check again
-		gt96100_delay(1);
-
-		if (--timedout == 0) {
-			printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__);
-			return -ENODEV;
-		}
-	}
-
-	GT96100_WRITE(GT96100_ETH_SMI_REG, smir);
-
-	timedout = 20;
-	// wait for read to complete
-	while (!((smir = GT96100_READ(GT96100_ETH_SMI_REG)) & smirReadValid)) {
-		// snooze for 1 msec and check again
-		gt96100_delay(1);
-
-		if (--timedout == 0) {
-			printk(KERN_ERR "%s: timeout!!\n", __FUNCTION__);
-			return -ENODEV;
-		}
-	}
-
-	return (int)(smir & smirDataMask);
-}
-
-static void
-dump_tx_desc(int dbg_lvl, struct net_device *dev, int i)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	gt96100_td_t *td = &gp->tx_ring[i];
-
-	dbg(dbg_lvl, "Tx descriptor at 0x%08lx:\n", virt_to_phys(td));
-	dbg(dbg_lvl,
-	    "    cmdstat=%04x, byte_cnt=%04x, buff_ptr=%04x, next=%04x\n",
-	    dma32_to_cpu(td->cmdstat),
-	    dma16_to_cpu(td->byte_cnt),
-	    dma32_to_cpu(td->buff_ptr),
-	    dma32_to_cpu(td->next));
-}
-
-static void
-dump_rx_desc(int dbg_lvl, struct net_device *dev, int i)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	gt96100_rd_t *rd = &gp->rx_ring[i];
-
-	dbg(dbg_lvl, "Rx descriptor at 0x%08lx:\n", virt_to_phys(rd));
-	dbg(dbg_lvl, "    cmdstat=%04x, buff_sz=%04x, byte_cnt=%04x, "
-	    "buff_ptr=%04x, next=%04x\n",
-	    dma32_to_cpu(rd->cmdstat),
-	    dma16_to_cpu(rd->buff_sz),
-	    dma16_to_cpu(rd->byte_cnt),
-	    dma32_to_cpu(rd->buff_ptr),
-	    dma32_to_cpu(rd->next));
-}
-
-static int
-write_MII(int phy_addr, u32 reg, u16 data)
-{
-	int timedout = 20;
-	u32 smir = (phy_addr << smirPhyAdBit) |
-		(reg << smirRegAdBit) | data;
-
-	// wait for last operation to complete
-	while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) {
-		// snooze for 1 msec and check again
-		gt96100_delay(1);
-
-		if (--timedout == 0) {
-			printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__);
-			return -1;
-		}
-	}
-
-	GT96100_WRITE(GT96100_ETH_SMI_REG, smir);
-	return 0;
-}
-
-static void
-dump_MII(int dbg_lvl, struct net_device *dev)
-{
-	int i, val;
-	struct gt96100_private *gp = netdev_priv(dev);
-
-	if (dbg_lvl <= GT96100_DEBUG) {
-		for (i=0; i<7; i++) {
-			if ((val = read_MII(gp->phy_addr, i)) >= 0)
-				printk("MII Reg %d=%x\n", i, val);
-		}
-		for (i=16; i<21; i++) {
-			if ((val = read_MII(gp->phy_addr, i)) >= 0)
-				printk("MII Reg %d=%x\n", i, val);
-		}
-	}
-}
-
-static void
-dump_hw_addr(int dbg_lvl, struct net_device *dev, const char* pfx,
-	     const char* func, unsigned char* addr_str)
-{
-	int i;
-	char buf[100], octet[5];
-
-	if (dbg_lvl <= GT96100_DEBUG) {
-		sprintf(buf, pfx, func);
-		for (i = 0; i < 6; i++) {
-			sprintf(octet, "%2.2x%s",
-				addr_str[i], i<5 ? ":" : "\n");
-			strcat(buf, octet);
-		}
-		info("%s", buf);
-	}
-}
-
-
-static void
-dump_skb(int dbg_lvl, struct net_device *dev, struct sk_buff *skb)
-{
-	int i;
-	unsigned char* skbdata;
-
-	if (dbg_lvl <= GT96100_DEBUG) {
-		dbg(dbg_lvl, "%s: skb=%p, skb->data=%p, skb->len=%d\n",
-		    __FUNCTION__, skb, skb->data, skb->len);
-
-		skbdata = (unsigned char*)KSEG1ADDR(skb->data);
-
-		for (i=0; i<skb->len; i++) {
-			if (!(i % 16))
-				printk(KERN_DEBUG "\n   %3.3x: %2.2x,",
-				       i, skbdata[i]);
-			else
-				printk(KERN_DEBUG "%2.2x,", skbdata[i]);
-		}
-		printk(KERN_DEBUG "\n");
-	}
-}
-
-
-static int
-gt96100_add_hash_entry(struct net_device *dev, unsigned char* addr)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	//u16 hashResult, stmp;
-	//unsigned char ctmp, hash_ea[6];
-	u32 tblEntry1, tblEntry0, *tblEntryAddr;
-	int i;
-
-	tblEntry1 = hteValid | hteRD;
-	tblEntry1 |= (u32)addr[5] << 3;
-	tblEntry1 |= (u32)addr[4] << 11;
-	tblEntry1 |= (u32)addr[3] << 19;
-	tblEntry1 |= ((u32)addr[2] & 0x1f) << 27;
-	dbg(3, "%s: tblEntry1=%x\n", __FUNCTION__, tblEntry1);
-	tblEntry0 = ((u32)addr[2] >> 5) & 0x07;
-	tblEntry0 |= (u32)addr[1] << 3;
-	tblEntry0 |= (u32)addr[0] << 11;
-	dbg(3, "%s: tblEntry0=%x\n", __FUNCTION__, tblEntry0);
-
-#if 0
-
-	for (i=0; i<6; i++) {
-		// nibble swap
-		ctmp = nibswap(addr[i]);
-		// invert every nibble
-		hash_ea[i] = ((ctmp&1)<<3) | ((ctmp&8)>>3) |
-			((ctmp&2)<<1) | ((ctmp&4)>>1);
-		hash_ea[i] |= ((ctmp&0x10)<<3) | ((ctmp&0x80)>>3) |
-			((ctmp&0x20)<<1) | ((ctmp&0x40)>>1);
-	}
-
-	dump_hw_addr(3, dev, "%s: nib swap/invt addr=", __FUNCTION__, hash_ea);
-
-	if (gp->hash_mode == 0) {
-		hashResult = ((u16)hash_ea[0] & 0xfc) << 7;
-		stmp = ((u16)hash_ea[0] & 0x03) |
-			(((u16)hash_ea[1] & 0x7f) << 2);
-		stmp ^= (((u16)hash_ea[1] >> 7) & 0x01) |
-			((u16)hash_ea[2] << 1);
-		stmp ^= (u16)hash_ea[3] | (((u16)hash_ea[4] & 1) << 8);
-		hashResult |= stmp;
-	} else {
-		return -1; // don't support hash mode 1
-	}
-
-	dbg(3, "%s: hashResult=%x\n", __FUNCTION__, hashResult);
-
-	tblEntryAddr =
-		(u32 *)(&gp->hash_table[((u32)hashResult & 0x7ff) << 3]);
-
-	dbg(3, "%s: tblEntryAddr=%p\n", tblEntryAddr, __FUNCTION__);
-
-	for (i=0; i<HASH_HOP_NUMBER; i++) {
-		if ((*tblEntryAddr & hteValid) &&
-		    !(*tblEntryAddr & hteSkip)) {
-			// This entry is already occupied, go to next entry
-			tblEntryAddr += 2;
-			dbg(3, "%s: skipping to %p\n", __FUNCTION__,
-			    tblEntryAddr);
-		} else {
-			memset(tblEntryAddr, 0, 8);
-			tblEntryAddr[1] = cpu_to_dma32(tblEntry1);
-			tblEntryAddr[0] = cpu_to_dma32(tblEntry0);
-			break;
-		}
-	}
-
-	if (i >= HASH_HOP_NUMBER) {
-		err("%s: expired!\n", __FUNCTION__);
-		return -1; // Couldn't find an unused entry
-	}
-
-#else
-
-	tblEntryAddr = (u32 *)gp->hash_table;
-	for (i=0; i<RX_HASH_TABLE_SIZE/4; i+=2) {
-		tblEntryAddr[i+1] = cpu_to_dma32(tblEntry1);
-		tblEntryAddr[i] = cpu_to_dma32(tblEntry0);
-	}
-
-#endif
-
-	return 0;
-}
-
-
-static void
-read_mib_counters(struct gt96100_private *gp)
-{
-	u32* mib_regs = (u32*)&gp->mib;
-	int i;
-
-	for (i=0; i<sizeof(mib_counters_t)/sizeof(u32); i++)
-		mib_regs[i] = GT96100ETH_READ(gp, GT96100_ETH_MIB_COUNT_BASE +
-					      i*sizeof(u32));
-}
-
-
-static void
-update_stats(struct gt96100_private *gp)
-{
-	mib_counters_t *mib = &gp->mib;
-	struct net_device_stats *stats = &gp->stats;
-
-	read_mib_counters(gp);
-
-	stats->rx_packets = mib->totalFramesReceived;
-	stats->tx_packets = mib->framesSent;
-	stats->rx_bytes = mib->totalByteReceived;
-	stats->tx_bytes = mib->byteSent;
-	stats->rx_errors = mib->totalFramesReceived - mib->framesReceived;
-	//the tx error counters are incremented by the ISR
-	//rx_dropped incremented by gt96100_rx
-	//tx_dropped incremented by gt96100_tx
-	stats->multicast = mib->multicastFramesReceived;
-	// collisions incremented by gt96100_tx_complete
-	stats->rx_length_errors = mib->oversizeFrames + mib->fragments;
-	// The RxError condition means the Rx DMA encountered a
-	// CPU owned descriptor, which, if things are working as
-	// they should, means the Rx ring has overflowed.
-	stats->rx_over_errors = mib->macRxError;
-	stats->rx_crc_errors = mib->cRCError;
-}
-
-static void
-abort(struct net_device *dev, u32 abort_bits)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	int timedout = 100; // wait up to 100 msec for hard stop to complete
-
-	dbg(3, "%s\n", __FUNCTION__);
-
-	// Return if neither Rx or Tx abort bits are set
-	if (!(abort_bits & (sdcmrAR | sdcmrAT)))
-		return;
-
-	// make sure only the Rx/Tx abort bits are set
-	abort_bits &= (sdcmrAR | sdcmrAT);
-
-	spin_lock(&gp->lock);
-
-	// abort any Rx/Tx DMA immediately
-	GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, abort_bits);
-
-	dbg(3, "%s: SDMA comm = %x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM));
-
-	// wait for abort to complete
-	while (GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM) & abort_bits) {
-		// snooze for 1 msec and check again
-		gt96100_delay(1);
-
-		if (--timedout == 0) {
-			err("%s: timeout!!\n", __FUNCTION__);
-			break;
-		}
-	}
-
-	spin_unlock(&gp->lock);
-}
-
-
-static void
-hard_stop(struct net_device *dev)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-
-	dbg(3, "%s\n", __FUNCTION__);
-
-	disable_ether_irq(dev);
-
-	abort(dev, sdcmrAR | sdcmrAT);
-
-	// disable port
-	GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, 0);
-}
-
-
-static void
-enable_ether_irq(struct net_device *dev)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	u32 intMask;
-	/*
-	 * route ethernet interrupt to GT_SERINT0 for port 0,
-	 * GT_INT0 for port 1.
-	 */
-	int intr_mask_reg = (gp->port_num == 0) ?
-		GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK;
-
-	if (gp->chip_rev >= REV_GT96100A_1) {
-		intMask = icrTxBufferLow | icrTxEndLow |
-			icrTxErrorLow  | icrRxOVR | icrTxUdr |
-			icrRxBufferQ0 | icrRxErrorQ0 |
-			icrMIIPhySTC | icrEtherIntSum;
-	}
-	else {
-		intMask = icrTxBufferLow | icrTxEndLow |
-			icrTxErrorLow  | icrRxOVR | icrTxUdr |
-			icrRxBuffer | icrRxError |
-			icrMIIPhySTC | icrEtherIntSum;
-	}
-
-	// unmask interrupts
-	GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, intMask);
-
-	intMask = GT96100_READ(intr_mask_reg);
-	intMask |= 1<<gp->port_num;
-	GT96100_WRITE(intr_mask_reg, intMask);
-}
-
-static void
-disable_ether_irq(struct net_device *dev)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	u32 intMask;
-	int intr_mask_reg = (gp->port_num == 0) ?
-		GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK;
-
-	intMask = GT96100_READ(intr_mask_reg);
-	intMask &= ~(1<<gp->port_num);
-	GT96100_WRITE(intr_mask_reg, intMask);
-
-	GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, 0);
-}
-
-
-/*
- * Init GT96100 ethernet controller driver
- */
-static int gt96100_init_module(void)
-{
-	struct pci_dev *pci;
-	int i, retval=0;
-	u32 cpuConfig;
-
-	/*
-	 * Stupid probe because this really isn't a PCI device
-	 */
-	if (!(pci = pci_get_device(PCI_VENDOR_ID_MARVELL,
-	                            PCI_DEVICE_ID_MARVELL_GT96100, NULL)) &&
-	    !(pci = pci_get_device(PCI_VENDOR_ID_MARVELL,
-		                    PCI_DEVICE_ID_MARVELL_GT96100A, NULL))) {
-		printk(KERN_ERR __FILE__ ": GT96100 not found!\n");
-		return -ENODEV;
-	}
-
-	cpuConfig = GT96100_READ(GT96100_CPU_INTERF_CONFIG);
-	if (cpuConfig & (1<<12)) {
-		printk(KERN_ERR __FILE__
-		       ": must be in Big Endian mode!\n");
-		return -ENODEV;
-	}
-
-	for (i=0; i < NUM_INTERFACES; i++)
-		retval |= gt96100_probe1(pci, i);
-		
-	pci_dev_put(pci);
-
-	return retval;
-}
-
-static int __init gt96100_probe1(struct pci_dev *pci, int port_num)
-{
-	struct gt96100_private *gp = NULL;
-	struct gt96100_if_t *gtif = &gt96100_iflist[port_num];
-	int phy_addr, phy_id1, phy_id2;
-	u32 phyAD;
-	int retval;
-	unsigned char chip_rev;
-	struct net_device *dev = NULL;
-
-	if (gtif->irq < 0) {
-		printk(KERN_ERR "%s: irq unknown - probing not supported\n",
-		      __FUNCTION__);
-		return -ENODEV;
-	}
-
-	pci_read_config_byte(pci, PCI_REVISION_ID, &chip_rev);
-
-	if (chip_rev >= REV_GT96100A_1) {
-		phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG);
-		phy_addr = (phyAD >> (5*port_num)) & 0x1f;
-	} else {
-		/*
-		 * not sure what's this about -- probably a gt bug
-		 */
-		phy_addr = port_num;
-		phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG);
-		phyAD &= ~(0x1f << (port_num*5));
-		phyAD |= phy_addr << (port_num*5);
-		GT96100_WRITE(GT96100_ETH_PHY_ADDR_REG, phyAD);
-	}
-
-	// probe for the external PHY
-	if ((phy_id1 = read_MII(phy_addr, 2)) <= 0 ||
-	    (phy_id2 = read_MII(phy_addr, 3)) <= 0) {
-		printk(KERN_ERR "%s: no PHY found on MII%d\n", __FUNCTION__, port_num);
-		return -ENODEV;
-	}
-
-	if (!request_region(gtif->iobase, GT96100_ETH_IO_SIZE, "GT96100ETH")) {
-		printk(KERN_ERR "%s: request_region failed\n", __FUNCTION__);
-		return -EBUSY;
-	}
-
-	dev = alloc_etherdev(sizeof(struct gt96100_private));
-	if (!dev)
-		goto out;
-	gtif->dev = dev;
-
-	/* private struct aligned and zeroed by alloc_etherdev */
-	/* Fill in the 'dev' fields. */
-	dev->base_addr = gtif->iobase;
-	dev->irq = gtif->irq;
-
-	if ((retval = parse_mac_addr(dev, gtif->mac_str))) {
-		err("%s: MAC address parse failed\n", __FUNCTION__);
-		retval = -EINVAL;
-		goto out1;
-	}
-
-	gp = netdev_priv(dev);
-
-	memset(gp, 0, sizeof(*gp)); // clear it
-
-	gp->port_num = port_num;
-	gp->port_offset = port_num * GT96100_ETH_IO_SIZE;
-	gp->phy_addr = phy_addr;
-	gp->chip_rev = chip_rev;
-
-	info("%s found at 0x%x, irq %d\n",
-	     chip_name(gp->chip_rev), gtif->iobase, gtif->irq);
-	dump_hw_addr(0, dev, "%s: HW Address ", __FUNCTION__, dev->dev_addr);
-	info("%s chip revision=%d\n", chip_name(gp->chip_rev), gp->chip_rev);
-	info("%s ethernet port %d\n", chip_name(gp->chip_rev), gp->port_num);
-	info("external PHY ID1=0x%04x, ID2=0x%04x\n", phy_id1, phy_id2);
-
-	// Allocate Rx and Tx descriptor rings
-	if (gp->rx_ring == NULL) {
-		// All descriptors in ring must be 16-byte aligned
-		gp->rx_ring = dmaalloc(sizeof(gt96100_rd_t) * RX_RING_SIZE
-				       + sizeof(gt96100_td_t) * TX_RING_SIZE,
-				       &gp->rx_ring_dma);
-		if (gp->rx_ring == NULL) {
-			retval = -ENOMEM;
-			goto out1;
-		}
-
-		gp->tx_ring = (gt96100_td_t *)(gp->rx_ring + RX_RING_SIZE);
-		gp->tx_ring_dma =
-			gp->rx_ring_dma + sizeof(gt96100_rd_t) * RX_RING_SIZE;
-	}
-
-	// Allocate the Rx Data Buffers
-	if (gp->rx_buff == NULL) {
-		gp->rx_buff = dmaalloc(PKT_BUF_SZ*RX_RING_SIZE,
-				       &gp->rx_buff_dma);
-		if (gp->rx_buff == NULL) {
-			retval = -ENOMEM;
-			goto out2;
-		}
-	}
-
-	dbg(3, "%s: rx_ring=%p, tx_ring=%p\n", __FUNCTION__,
-	    gp->rx_ring, gp->tx_ring);
-
-	// Allocate Rx Hash Table
-	if (gp->hash_table == NULL) {
-		gp->hash_table = (char*)dmaalloc(RX_HASH_TABLE_SIZE,
-						 &gp->hash_table_dma);
-		if (gp->hash_table == NULL) {
-			retval = -ENOMEM;
-			goto out3;
-		}
-	}
-
-	dbg(3, "%s: hash=%p\n", __FUNCTION__, gp->hash_table);
-
-	spin_lock_init(&gp->lock);
-
-	dev->open = gt96100_open;
-	dev->hard_start_xmit = gt96100_tx;
-	dev->stop = gt96100_close;
-	dev->get_stats = gt96100_get_stats;
-	//dev->do_ioctl = gt96100_ioctl;
-	dev->set_multicast_list = gt96100_set_rx_mode;
-	dev->tx_timeout = gt96100_tx_timeout;
-	dev->watchdog_timeo = GT96100ETH_TX_TIMEOUT;
-
-	retval = register_netdev(dev);
-	if (retval)
-		goto out4;
-	return 0;
-
-out4:
-	dmafree(RX_HASH_TABLE_SIZE, gp->hash_table_dma);
-out3:
-	dmafree(PKT_BUF_SZ*RX_RING_SIZE, gp->rx_buff);
-out2:
-	dmafree(sizeof(gt96100_rd_t) * RX_RING_SIZE
-		+ sizeof(gt96100_td_t) * TX_RING_SIZE,
-		gp->rx_ring);
-out1:
-	free_netdev (dev);
-out:
-	release_region(gtif->iobase, GT96100_ETH_IO_SIZE);
-
-	err("%s failed.  Returns %d\n", __FUNCTION__, retval);
-	return retval;
-}
-
-
-static void
-reset_tx(struct net_device *dev)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	int i;
-
-	abort(dev, sdcmrAT);
-
-	for (i=0; i<TX_RING_SIZE; i++) {
-		if (gp->tx_skbuff[i]) {
-			if (in_interrupt())
-				dev_kfree_skb_irq(gp->tx_skbuff[i]);
-			else
-				dev_kfree_skb(gp->tx_skbuff[i]);
-			gp->tx_skbuff[i] = NULL;
-		}
-
-		gp->tx_ring[i].cmdstat = 0; // CPU owns
-		gp->tx_ring[i].byte_cnt = 0;
-		gp->tx_ring[i].buff_ptr = 0;
-		gp->tx_ring[i].next =
-			cpu_to_dma32(gp->tx_ring_dma +
-				     sizeof(gt96100_td_t) * (i+1));
-		dump_tx_desc(4, dev, i);
-	}
-	/* Wrap the ring. */
-	gp->tx_ring[i-1].next = cpu_to_dma32(gp->tx_ring_dma);
-
-	// setup only the lowest priority TxCDP reg
-	GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR0, gp->tx_ring_dma);
-	GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR1, 0);
-
-	// init Tx indeces and pkt counter
-	gp->tx_next_in = gp->tx_next_out = 0;
-	gp->tx_count = 0;
-
-}
-
-static void
-reset_rx(struct net_device *dev)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	int i;
-
-	abort(dev, sdcmrAR);
-
-	for (i=0; i<RX_RING_SIZE; i++) {
-		gp->rx_ring[i].next =
-			cpu_to_dma32(gp->rx_ring_dma +
-				     sizeof(gt96100_rd_t) * (i+1));
-		gp->rx_ring[i].buff_ptr =
-			cpu_to_dma32(gp->rx_buff_dma + i*PKT_BUF_SZ);
-		gp->rx_ring[i].buff_sz = cpu_to_dma16(PKT_BUF_SZ);
-		// Give ownership to device, set first and last, enable intr
-		gp->rx_ring[i].cmdstat =
-			cpu_to_dma32((u32)(rxFirst | rxLast | rxOwn | rxEI));
-		dump_rx_desc(4, dev, i);
-	}
-	/* Wrap the ring. */
-	gp->rx_ring[i-1].next = cpu_to_dma32(gp->rx_ring_dma);
-
-	// Setup only the lowest priority RxFDP and RxCDP regs
-	for (i=0; i<4; i++) {
-		if (i == 0) {
-			GT96100ETH_WRITE(gp, GT96100_ETH_1ST_RX_DESC_PTR0,
-					 gp->rx_ring_dma);
-			GT96100ETH_WRITE(gp, GT96100_ETH_CURR_RX_DESC_PTR0,
-					 gp->rx_ring_dma);
-		} else {
-			GT96100ETH_WRITE(gp,
-					 GT96100_ETH_1ST_RX_DESC_PTR0 + i*4,
-					 0);
-			GT96100ETH_WRITE(gp,
-					 GT96100_ETH_CURR_RX_DESC_PTR0 + i*4,
-					 0);
-		}
-	}
-
-	// init Rx NextOut index
-	gp->rx_next_out = 0;
-}
-
-
-// Returns 1 if the Tx counter and indeces don't gel
-static int
-gt96100_check_tx_consistent(struct gt96100_private *gp)
-{
-	int diff = gp->tx_next_in - gp->tx_next_out;
-
-	diff = diff<0 ? TX_RING_SIZE + diff : diff;
-	diff = gp->tx_count == TX_RING_SIZE ? diff + TX_RING_SIZE : diff;
-
-	return (diff != gp->tx_count);
-}
-
-static int
-gt96100_init(struct net_device *dev)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	u32 tmp;
-	u16 mii_reg;
-
-	dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
-	dbg(3, "%s: scs10_lo=%4x, scs10_hi=%4x\n", __FUNCTION__,
-	    GT96100_READ(0x8), GT96100_READ(0x10));
-	dbg(3, "%s: scs32_lo=%4x, scs32_hi=%4x\n", __FUNCTION__,
-	    GT96100_READ(0x18), GT96100_READ(0x20));
-
-	// Stop and disable Port
-	hard_stop(dev);
-
-	// Setup CIU Arbiter
-	tmp = GT96100_READ(GT96100_CIU_ARBITER_CONFIG);
-	tmp |= (0x0c << (gp->port_num*2)); // set Ether DMA req priority to hi
-#ifndef DESC_BE
-	tmp &= ~(1<<31);                   // set desc endianess to little
-#else
-	tmp |= (1<<31);
-#endif
-	GT96100_WRITE(GT96100_CIU_ARBITER_CONFIG, tmp);
-	dbg(3, "%s: CIU Config=%x/%x\n", __FUNCTION__,
-	    tmp, GT96100_READ(GT96100_CIU_ARBITER_CONFIG));
-
-	// Set routing.
-	tmp = GT96100_READ(GT96100_ROUTE_MAIN) & (0x3f << 18);
-	tmp |= (0x07 << (18 + gp->port_num*3));
-	GT96100_WRITE(GT96100_ROUTE_MAIN, tmp);
-
-	/* set MII as peripheral func */
-	tmp = GT96100_READ(GT96100_GPP_CONFIG2);
-	tmp |= 0x7fff << (gp->port_num*16);
-	GT96100_WRITE(GT96100_GPP_CONFIG2, tmp);
-
-	/* Set up MII port pin directions */
-	tmp = GT96100_READ(GT96100_GPP_IO2);
-	tmp |= 0x003d << (gp->port_num*16);
-	GT96100_WRITE(GT96100_GPP_IO2, tmp);
-
-	// Set-up hash table
-	memset(gp->hash_table, 0, RX_HASH_TABLE_SIZE); // clear it
-	gp->hash_mode = 0;
-	// Add a single entry to hash table - our ethernet address
-	gt96100_add_hash_entry(dev, dev->dev_addr);
-	// Set-up DMA ptr to hash table
-	GT96100ETH_WRITE(gp, GT96100_ETH_HASH_TBL_PTR, gp->hash_table_dma);
-	dbg(3, "%s: Hash Tbl Ptr=%x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_HASH_TBL_PTR));
-
-	// Setup Tx
-	reset_tx(dev);
-
-	dbg(3, "%s: Curr Tx Desc Ptr0=%x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_CURR_TX_DESC_PTR0));
-
-	// Setup Rx
-	reset_rx(dev);
-
-	dbg(3, "%s: 1st/Curr Rx Desc Ptr0=%x/%x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_1ST_RX_DESC_PTR0),
-	    GT96100ETH_READ(gp, GT96100_ETH_CURR_RX_DESC_PTR0));
-
-	// eth port config register
-	GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
-			 pcxrFCTL | pcxrFCTLen | pcxrFLP | pcxrDPLXen);
-
-	mii_reg = read_MII(gp->phy_addr, 0x11); /* int enable register */
-	mii_reg |= 2;  /* enable mii interrupt */
-	write_MII(gp->phy_addr, 0x11, mii_reg);
-
-	dbg(3, "%s: PhyAD=%x\n", __FUNCTION__,
-	    GT96100_READ(GT96100_ETH_PHY_ADDR_REG));
-
-	// setup DMA
-
-	// We want the Rx/Tx DMA to write/read data to/from memory in
-	// Big Endian mode. Also set DMA Burst Size to 8 64Bit words.
-#ifdef DESC_DATA_BE
-	GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG,
-			 (0xf<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit));
-#else
-	GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG,
-			 sdcrBLMR | sdcrBLMT |
-			 (0xf<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit));
-#endif
-	dbg(3, "%s: SDMA Config=%x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_SDMA_CONFIG));
-
-	// start Rx DMA
-	GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD);
-	dbg(3, "%s: SDMA Comm=%x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM));
-
-	// enable this port (set hash size to 1/2K)
-	GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, pcrEN | pcrHS);
-	dbg(3, "%s: Port Config=%x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG));
-
-	/*
-	 * Disable all Type-of-Service queueing. All Rx packets will be
-	 * treated normally and will be sent to the lowest priority
-	 * queue.
-	 *
-	 * Disable flow-control for now. FIXME: support flow control?
-	 */
-
-	// clear all the MIB ctr regs
-	GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
-			 pcxrFCTL | pcxrFCTLen | pcxrFLP |
-			 pcxrPRIOrxOverride);
-	read_mib_counters(gp);
-	GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
-			 pcxrFCTL | pcxrFCTLen | pcxrFLP |
-			 pcxrPRIOrxOverride | pcxrMIBclrMode);
-
-	dbg(3, "%s: Port Config Ext=%x\n", __FUNCTION__,
-	    GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG_EXT));
-
-	netif_start_queue(dev);
-
-	dump_MII(4, dev);
-
-	// enable interrupts
-	enable_ether_irq(dev);
-
-	// we should now be receiving frames
-	return 0;
-}
-
-
-static int
-gt96100_open(struct net_device *dev)
-{
-	int retval;
-
-	dbg(2, "%s: dev=%p\n", __FUNCTION__, dev);
-
-	// Initialize and startup the GT-96100 ethernet port
-	if ((retval = gt96100_init(dev))) {
-		err("error in gt96100_init\n");
-		free_irq(dev->irq, dev);
-		return retval;
-	}
-
-	if ((retval = request_irq(dev->irq, &gt96100_interrupt,
-				  IRQF_SHARED, dev->name, dev))) {
-		err("unable to get IRQ %d\n", dev->irq);
-		return retval;
-	}
-
-	dbg(2, "%s: Initialization done.\n", __FUNCTION__);
-
-	return 0;
-}
-
-static int
-gt96100_close(struct net_device *dev)
-{
-	dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
-
-	// stop the device
-	if (netif_device_present(dev)) {
-		netif_stop_queue(dev);
-		hard_stop(dev);
-	}
-
-	free_irq(dev->irq, dev);
-
-	return 0;
-}
-
-
-static int
-gt96100_tx(struct sk_buff *skb, struct net_device *dev)
-{
-	struct gt96100_private *gp = netdev_priv(dev);
-	unsigned long flags;
-	int nextIn;
-
-	spin_lock_irqsave(&gp->lock, flags);
-
-	nextIn = gp->tx_next_in;
-
-	dbg(3, "%s: nextIn=%d\n", __FUNCTION__, nextIn);
-
-	if (gp->tx_count >= TX_RING_SIZE) {
-		warn("Tx Ring full, pkt dropped.\n");
-		gp->stats.tx_dropped++;
-		spin_unlock_irqrestore(&gp->lock, flags);
-		return 1;
-	}
-
-	if (!(gp->last_psr & psrLink)) {
-		err("%s: Link down, pkt dropped.\n", __FUNCTION__);
-		gp->stats.tx_dropped++;
-		spin_unlock_irqrestore(&gp->lock, flags);
-		return 1;
-	}
-
-	if (dma32_to_cpu(gp->tx_ring[nextIn].cmdstat) & txOwn) {
-		err("%s: device owns descriptor, pkt dropped.\n", __FUNCTION__);
-		gp->stats.tx_dropped++;
-		// stop the queue, so Tx timeout can fix it
-		netif_stop_queue(dev);
-		spin_unlock_irqrestore(&gp->lock, flags);
-		return 1;
-	}
-
-	// Prepare the Descriptor at tx_next_in
-	gp->tx_skbuff[nextIn] = skb;
-	gp->tx_ring[nextIn].byte_cnt = cpu_to_dma16(skb->len);
-	gp->tx_ring[nextIn].b