patch-2.4.21 linux-2.4.21/drivers/net/ether00.c
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- Lines: 1002
- Date:
2003-06-13 07:51:34.000000000 -0700
- Orig file:
linux-2.4.20/drivers/net/ether00.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.20/drivers/net/ether00.c linux-2.4.21/drivers/net/ether00.c
@@ -0,0 +1,1001 @@
+/*
+ * drivers/net/ether00.c
+ *
+ * Copyright (C) 2001 Altera Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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
+ */
+
+/* includes */
+
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/sched.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/tqueue.h>
+#include <linux/mtd/mtd.h>
+#include <asm/arch/excalibur.h>
+#include <asm/arch/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/sizes.h>
+
+#include <asm/arch/ether00.h>
+#include <asm/arch/tdkphy.h>
+
+
+MODULE_AUTHOR("Clive Davies");
+MODULE_DESCRIPTION("Altera Ether00 IP core driver");
+MODULE_LICENSE("GPL");
+
+static long base=0x60000000;
+static int irq=0x1;
+static int phy_irq=0x2;
+MODULE_PARM(base,"l");
+MODULE_PARM(irq,"i");
+MODULE_PARM(phy_irq,"i");
+
+#define TX_TIMEOUT (400*HZ/1000)
+#define PKT_BUF_SZ 1540 /* Size of each rx buffer */
+
+
+#undef DEBUG
+#define DEBUG(x)
+
+#define __dma_va(x) (unsigned int)((unsigned int)priv->dma_data+(((unsigned int)(x))&(EXC_SPSRAM_BLOCK0_SIZE-1)))
+#define __dma_pa(x) (unsigned int)(EXC_SPSRAM_BLOCK0_BASE+(((unsigned int)(x))-(unsigned int)priv->dma_data))
+
+#define ETHER00_BASE 0
+#define ETHER00_TYPE
+#define ETHER00_NAME "ether00"
+#define MAC_REG_SIZE 0x400 /* size of MAC register area */
+
+
+
+/* typedefs */
+
+/* The definition of the driver control structure */
+
+#define RX_NUM_BUFF 10
+#define RX_NUM_FDESC 10
+#define TX_NUM_FDESC 10
+
+struct tx_fda_ent{
+ FDA_DESC fd;
+ BUF_DESC bd;
+ BUF_DESC pad;
+};
+struct rx_fda_ent{
+ FDA_DESC fd;
+ BUF_DESC bd;
+ BUF_DESC pad;
+};
+struct rx_blist_ent{
+ FDA_DESC fd;
+ BUF_DESC bd;
+ BUF_DESC pad;
+};
+struct net_priv
+{
+ struct net_device_stats stats;
+ struct sk_buff* skb;
+ void* dma_data;
+ struct rx_blist_ent* rx_blist_vp;
+ struct rx_fda_ent* rx_fda_ptr;
+ struct tx_fda_ent* tx_fdalist_vp;
+ struct tq_struct tq_memupdate;
+ unsigned char rx_disabled;
+ unsigned char memupdate_scheduled;
+ unsigned char queue_stopped;
+ spinlock_t dma_lock;
+ unsigned int tx_head;
+ unsigned int tx_tail;
+};
+
+static const char vendor_id[2]={0x07,0xed};
+
+#ifdef ETHER00_DEBUG
+
+/* Dump (most) registers for debugging puposes */
+
+static void dump_regs(struct net_device *dev){
+ struct net_priv* priv=dev->priv;
+ unsigned int* i;
+
+ printk("\n RX free descriptor area:\n");
+
+ for(i=(unsigned int*)priv->rx_fda_ptr;
+ i<((unsigned int*)(priv->rx_fda_ptr+RX_NUM_FDESC));){
+ printk("%#8x %#8x %#8x %#8x\n",*i,*(i+1),*(i+2),*(i+3));
+ i+=4;
+ }
+
+ printk("\n RX buffer list:\n");
+
+ for(i=(unsigned int*)priv->rx_blist_vp;
+ i<((unsigned int*)(priv->rx_blist_vp+RX_NUM_BUFF));){
+ printk("%#8x %#8x %#8x %#8x\n",*i,*(i+1),*(i+2),*(i+3));
+ i+=4;
+ }
+
+ printk("\n TX frame descriptor list:\n");
+
+ for(i=(unsigned int*)priv->tx_fdalist_vp;
+ i<((unsigned int*)(priv->tx_fdalist_vp+TX_NUM_FDESC));){
+ printk("%#8x %#8x %#8x %#8x\n",*i,*(i+1),*(i+2),*(i+3));
+ i+=4;
+ }
+
+ printk("\ndma ctl=%#x\n",readw(ETHER_DMA_CTL(dev->base_addr)));
+ printk("txfrmptr=%#x\n",readw(ETHER_TXFRMPTR(dev->base_addr)));
+ printk("txthrsh=%#x\n",readw(ETHER_TXTHRSH(dev->base_addr)));
+ printk("txpollctr=%#x\n",readw(ETHER_TXPOLLCTR(dev->base_addr)));
+ printk("blfrmptr=%#x\n",readw(ETHER_BLFRMPTR(dev->base_addr)));
+ printk("rxfragsize=%#x\n",readw(ETHER_RXFRAGSIZE(dev->base_addr)));
+ printk("tx_int_en=%#x\n",readw(ETHER_INT_EN(dev->base_addr)));
+ printk("fda_bas=%#x\n",readw(ETHER_FDA_BAS(dev->base_addr)));
+ printk("fda_lim=%#x\n",readw(ETHER_FDA_LIM(dev->base_addr)));
+ printk("int_src=%#x\n",readw(ETHER_INT_SRC(dev->base_addr)));
+ printk("pausecnt=%#x\n",readw(ETHER_PAUSECNT(dev->base_addr)));
+ printk("rempaucnt=%#x\n",readw(ETHER_REMPAUCNT(dev->base_addr)));
+ printk("txconfrmstat=%#x\n",readw(ETHER_TXCONFRMSTAT(dev->base_addr)));
+ printk("mac_ctl=%#x\n",readw(ETHER_MAC_CTL(dev->base_addr)));
+ printk("arc_ctl=%#x\n",readw(ETHER_ARC_CTL(dev->base_addr)));
+ printk("tx_ctl=%#x\n",readw(ETHER_TX_CTL(dev->base_addr)));
+}
+#endif /* ETHER00_DEBUG */
+
+
+static int ether00_write_phy(struct net_device *dev, short address, short value)
+{
+ volatile int count = 1024;
+ writew(value,ETHER_MD_DATA(dev->base_addr));
+ writew( ETHER_MD_CA_BUSY_MSK |
+ ETHER_MD_CA_WR_MSK |
+ (address & ETHER_MD_CA_ADDR_MSK),
+ ETHER_MD_CA(dev->base_addr));
+
+ /* Wait for the command to complete */
+ while((readw(ETHER_MD_CA(dev->base_addr)) & ETHER_MD_CA_BUSY_MSK)&&count){
+ count--;
+ }
+ if (!count){
+ printk("Write to phy failed, addr=%#x, data=%#x\n",address, value);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int ether00_read_phy(struct net_device *dev, short address)
+{
+ volatile int count = 1024;
+ writew( ETHER_MD_CA_BUSY_MSK |
+ (address & ETHER_MD_CA_ADDR_MSK),
+ ETHER_MD_CA(dev->base_addr));
+
+ /* Wait for the command to complete */
+ while((readw(ETHER_MD_CA(dev->base_addr)) & ETHER_MD_CA_BUSY_MSK)&&count){
+ count--;
+ }
+ if (!count){
+ printk(KERN_WARNING "Read from phy timed out\n");
+ return -EIO;
+ }
+ return readw(ETHER_MD_DATA(dev->base_addr));
+}
+
+static void ether00_phy_int(int irq_num, void* dev_id, struct pt_regs* regs)
+{
+ struct net_device* dev=dev_id;
+ int irq_status;
+
+ irq_status=ether00_read_phy(dev, PHY_IRQ_CONTROL);
+
+ if(irq_status & PHY_IRQ_CONTROL_ANEG_COMP_INT_MSK){
+ /*
+ * Autonegotiation complete on epxa10db. The mac doesn't
+ * twig if we're in full duplex so we need to check the
+ * phy diagnostic register and configure the mac accordingly
+ */
+ if(ether00_read_phy(dev, PHY_DIAGNOSTIC)&PHY_DIAGNOSTIC_DPLX_MSK){
+ int tmp;
+ tmp=readl(ETHER_MAC_CTL(dev->base_addr));
+ writel(tmp|ETHER_MAC_CTL_FULLDUP_MSK,
+ ETHER_MAC_CTL(dev->base_addr));
+ }
+ else
+ {
+ int tmp;
+ tmp=readl(ETHER_MAC_CTL(dev->base_addr));
+ writel(tmp&(~ETHER_MAC_CTL_FULLDUP_MSK),
+ ETHER_MAC_CTL(dev->base_addr));
+
+ }
+ }
+
+ if(irq_status&PHY_IRQ_CONTROL_LS_CHG_INT_MSK){
+
+ if(ether00_read_phy(dev, PHY_STATUS)& PHY_STATUS_LINK_MSK){
+ /* Link is up */
+ netif_carrier_on(dev);
+ }else{
+ netif_carrier_off(dev);
+ }
+ }
+
+}
+
+static void setup_blist_entry(struct sk_buff* skb,struct rx_blist_ent* blist_ent_ptr){
+ /* Make the buffer consistent with the cache as the mac is going to write
+ * directly into it*/
+ blist_ent_ptr->fd.FDSystem=(unsigned int)skb;
+ blist_ent_ptr->bd.BuffData=(char*)__pa(skb->data);
+ consistent_sync(skb->data,PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
+ /* align IP on 16 Byte (DMA_CTL set to skip 2 bytes) */
+ skb_reserve(skb,2);
+ blist_ent_ptr->bd.BuffLength=PKT_BUF_SZ-2;
+ blist_ent_ptr->fd.FDLength=1;
+ blist_ent_ptr->fd.FDCtl=FDCTL_COWNSFD_MSK;
+ blist_ent_ptr->bd.BDCtl=BDCTL_COWNSBD_MSK;
+}
+
+
+static int ether00_mem_init(struct net_device* dev)
+{
+ struct net_priv* priv=dev->priv;
+ struct tx_fda_ent *tx_fd_ptr,*tx_end_ptr;
+ struct rx_blist_ent* blist_ent_ptr;
+ int i;
+
+ /*
+ * Grab a block of on chip SRAM to contain the control stuctures for
+ * the ethernet MAC. This uncached becuase it needs to be accesses by both
+ * bus masters (cpu + mac). However, it shouldn't matter too much in terms
+ * of speed as its on chip memory
+ */
+ priv->dma_data=ioremap_nocache(EXC_SPSRAM_BLOCK0_BASE,EXC_SPSRAM_BLOCK0_SIZE );
+ if (!priv->dma_data)
+ return -ENOMEM;
+
+ priv->rx_fda_ptr=(struct rx_fda_ent*)priv->dma_data;
+ /*
+ * Now share it out amongst the Frame descriptors and the buffer list
+ */
+ priv->rx_blist_vp=(struct rx_blist_ent*)((unsigned int)priv->dma_data+RX_NUM_FDESC*sizeof(struct rx_fda_ent));
+
+ /*
+ *Initalise the FDA list
+ */
+ /* set ownership to the controller */
+ memset(priv->rx_fda_ptr,0x80,RX_NUM_FDESC*sizeof(struct rx_fda_ent));
+
+ /*
+ *Initialise the buffer list
+ */
+ blist_ent_ptr=priv->rx_blist_vp;
+ i=0;
+ while(blist_ent_ptr<(priv->rx_blist_vp+RX_NUM_BUFF)){
+ struct sk_buff *skb;
+ blist_ent_ptr->fd.FDLength=1;
+ skb=dev_alloc_skb(PKT_BUF_SZ);
+ if(skb){
+ setup_blist_entry(skb,blist_ent_ptr);
+ blist_ent_ptr->fd.FDNext=(FDA_DESC*)__dma_pa(blist_ent_ptr+1);
+ blist_ent_ptr->bd.BDStat=i++;
+ blist_ent_ptr++;
+ }
+ else
+ {
+ printk("Failed to initalise buffer list\n");
+ }
+
+ }
+ blist_ent_ptr--;
+ blist_ent_ptr->fd.FDNext=(FDA_DESC*)__dma_pa(priv->rx_blist_vp);
+
+ priv->tx_fdalist_vp=(struct tx_fda_ent*)(priv->rx_blist_vp+RX_NUM_BUFF);
+
+ /* Initialise the buffers to be a circular list. The mac will then go poll
+ * the list until it finds a frame ready to transmit */
+ tx_end_ptr=priv->tx_fdalist_vp+TX_NUM_FDESC;
+ for(tx_fd_ptr=priv->tx_fdalist_vp;tx_fd_ptr<tx_end_ptr;tx_fd_ptr++){
+ tx_fd_ptr->fd.FDNext=(FDA_DESC*)__dma_pa((tx_fd_ptr+1));
+ tx_fd_ptr->fd.FDCtl=1;
+ tx_fd_ptr->fd.FDStat=0;
+ tx_fd_ptr->fd.FDSystem=0;
+ tx_fd_ptr->fd.FDLength=1;
+
+ }
+ /* Change the last FDNext pointer to make a circular list */
+ tx_fd_ptr--;
+ tx_fd_ptr->fd.FDNext=(FDA_DESC*)__dma_pa(priv->tx_fdalist_vp);
+
+ /* Point the device at the chain of Rx and Tx Buffers */
+ writel((unsigned int)__dma_pa(priv->rx_fda_ptr),ETHER_FDA_BAS(dev->base_addr));
+ writel((RX_NUM_FDESC-1)*sizeof(struct rx_fda_ent),ETHER_FDA_LIM(dev->base_addr));
+ writel((unsigned int)__dma_pa(priv->rx_blist_vp),ETHER_BLFRMPTR(dev->base_addr));
+
+ priv->tx_tail = priv->tx_head = (unsigned int) priv->tx_fdalist_vp;
+ writel((unsigned int) __dma_pa(priv->tx_head), ETHER_TXFRMPTR(dev->base_addr));
+
+ return 0;
+}
+
+
+void ether00_mem_update(void* dev_id)
+{
+ struct net_device* dev=dev_id;
+ struct net_priv* priv=dev->priv;
+ struct rx_blist_ent* blist_ent_ptr;
+ unsigned long flags;
+ int enable_rx = 0;
+
+ priv->tq_memupdate.sync=0;
+ priv->memupdate_scheduled=0;
+
+ /* Fill in any missing buffers from the received queue */
+ blist_ent_ptr=priv->rx_blist_vp;
+ while(blist_ent_ptr<(priv->rx_blist_vp+RX_NUM_BUFF)){
+ spin_lock_irqsave(&priv->dma_lock,flags);
+ /* fd.FDSystem of 0 indicates we failed to allocate the buffer in the ISR */
+ if(!blist_ent_ptr->fd.FDSystem){
+ struct sk_buff *skb;
+ skb=dev_alloc_skb(PKT_BUF_SZ);
+ blist_ent_ptr->fd.FDSystem=(unsigned int)skb;
+ if(skb){
+ setup_blist_entry(skb,blist_ent_ptr);
+ enable_rx = 1;
+ }
+ else
+ {
+ /*
+ * reschedule the clean up, since we
+ * didn't patch up all the buffers
+ */
+
+ if(!priv->memupdate_scheduled){
+ schedule_task(&priv->tq_memupdate);
+ priv->memupdate_scheduled=1;
+ }
+ spin_unlock_irqrestore(&priv->dma_lock,flags);
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&priv->dma_lock,flags);
+ blist_ent_ptr++;
+ }
+
+ if(enable_rx){
+ if (!priv->rx_disabled){
+ priv->rx_disabled = 0;
+ writel(ETHER_RX_CTL_RXEN_MSK,ETHER_RX_CTL(dev->base_addr));
+ }
+ }
+}
+
+
+static void ether00_int( int irq_num, void* dev_id, struct pt_regs* regs)
+{
+ struct net_device* dev=dev_id;
+ struct net_priv* priv=dev->priv;
+
+ unsigned int interruptValue;
+
+ int enable_tx = 0;
+ struct tx_fda_ent *fda_ptr;
+ struct sk_buff* skb;
+
+ interruptValue=readl(ETHER_INT_SRC(dev->base_addr));
+
+ if(!(readl(ETHER_INT_SRC(dev->base_addr)) & ETHER_INT_SRC_IRQ_MSK))
+ {
+ return; /* Interrupt wasn't caused by us!! */
+ }
+
+ if(readl(ETHER_INT_SRC(dev->base_addr))&
+ (ETHER_INT_SRC_INTMACRX_MSK |
+ ETHER_INT_SRC_FDAEX_MSK |
+ ETHER_INT_SRC_BLEX_MSK)) {
+ struct rx_blist_ent* blist_ent_ptr;
+ struct rx_fda_ent* fda_ent_ptr;
+ struct sk_buff* skb;
+
+ fda_ent_ptr=priv->rx_fda_ptr;
+ spin_lock(&priv->dma_lock);
+ while(fda_ent_ptr<(priv->rx_fda_ptr+RX_NUM_FDESC)){
+ int result;
+
+ if(!(fda_ent_ptr->fd.FDCtl&FDCTL_COWNSFD_MSK))
+ {
+ /* This frame is ready for processing */
+ /*find the corresponding buffer in the bufferlist */
+ blist_ent_ptr=priv->rx_blist_vp+fda_ent_ptr->bd.BDStat;
+ skb=(struct sk_buff*)blist_ent_ptr->fd.FDSystem;
+
+ /* Pass this skb up the stack */
+ skb->dev=dev;
+ skb_put(skb,fda_ent_ptr->fd.FDLength);
+ skb->protocol=eth_type_trans(skb,dev);
+ skb->ip_summed=CHECKSUM_UNNECESSARY;
+ result=netif_rx(skb);
+ /* Update statistics */
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes+=fda_ent_ptr->fd.FDLength;
+
+ /* Free the FDA entry */
+ fda_ent_ptr->bd.BDStat=0xff;
+ fda_ent_ptr->fd.FDCtl=FDCTL_COWNSFD_MSK;
+
+ /* Allocate a new skb and point the bd entry to it */
+ blist_ent_ptr->fd.FDSystem=0;
+ skb=dev_alloc_skb(PKT_BUF_SZ);
+ if(skb){
+ setup_blist_entry(skb,blist_ent_ptr);
+
+ }
+ else if(!priv->memupdate_scheduled){
+ int tmp;
+ /* There are no buffers at the moment, so schedule */
+ /* the background task to sort this out */
+ schedule_task(&priv->tq_memupdate);
+ priv->memupdate_scheduled=1;
+ printk(KERN_DEBUG "%s:No buffers",dev->name);
+ /* If this interrupt was due to a lack of buffers then
+ * we'd better stop the receiver too */
+ if(interruptValueÐER_INT_SRC_BLEX_MSK){
+ priv->rx_disabled=1;
+ tmp=readl(ETHER_INT_SRC(dev->base_addr));
+ writel(tmp&~ETHER_RX_CTL_RXEN_MSK,ETHER_RX_CTL(dev->base_addr));
+ printk(KERN_DEBUG "%s:Halting rx",dev->name);
+ }
+
+ }
+
+ }
+ fda_ent_ptr++;
+ }
+ spin_unlock(&priv->dma_lock);
+
+ /* Clear the interrupts */
+ writel(ETHER_INT_SRC_INTMACRX_MSK | ETHER_INT_SRC_FDAEX_MSK
+ | ETHER_INT_SRC_BLEX_MSK,ETHER_INT_SRC(dev->base_addr));
+
+ }
+
+ if(readl(ETHER_INT_SRC(dev->base_addr))ÐER_INT_SRC_INTMACTX_MSK){
+
+ /* Transmit interrupt */
+
+ fda_ptr=(struct tx_fda_ent*) priv->tx_tail;
+
+ /* free up all completed frames */
+
+ while(!(FDCTL_COWNSFD_MSK&fda_ptr->fd.FDCtl) && fda_ptr->fd.FDSystem){
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes+=fda_ptr->bd.BuffLength;
+ skb=(struct sk_buff*)fda_ptr->fd.FDSystem;
+ dev_kfree_skb_irq(skb);
+ fda_ptr->fd.FDSystem=0;
+ fda_ptr->fd.FDStat=0;
+ fda_ptr->fd.FDCtl=0;
+ fda_ptr = (struct tx_fda_ent *)__dma_va(fda_ptr->fd.FDNext);
+ enable_tx = 1;
+ }
+ priv->tx_tail = (unsigned int) fda_ptr;
+
+ if(priv->queue_stopped && enable_tx){
+ priv->queue_stopped=0;
+ netif_wake_queue(dev);
+ }
+
+ /* Clear the interrupt */
+ writel(ETHER_INT_SRC_INTMACTX_MSK,ETHER_INT_SRC(dev->base_addr));
+ }
+
+ if (readl(ETHER_INT_SRC(dev->base_addr)) & (ETHER_INT_SRC_SWINT_MSK|
+ ETHER_INT_SRC_INTEARNOT_MSK|
+ ETHER_INT_SRC_INTLINK_MSK|
+ ETHER_INT_SRC_INTEXBD_MSK|
+ ETHER_INT_SRC_INTTXCTLCMP_MSK))
+ {
+ /*
+ * Not using any of these so they shouldn't happen
+ *
+ * In the cased of INTEXBD - if you allocate more
+ * than 28 decsriptors you may need to think about this
+ */
+ printk("Not using this interrupt\n");
+ }
+
+ if (readl(ETHER_INT_SRC(dev->base_addr)) &
+ (ETHER_INT_SRC_INTSBUS_MSK |
+ ETHER_INT_SRC_INTNRABT_MSK
+ |ETHER_INT_SRC_DMPARERR_MSK))
+ {
+ /*
+ * Hardware errors, we can either ignore them and hope they go away
+ *or reset the device, I'll try the first for now to see if they happen
+ */
+ printk("Hardware error\n");
+ }
+}
+
+static void ether00_setup_ethernet_address(struct net_device* dev)
+{
+ int tmp;
+
+ dev->addr_len=6;
+ writew(0,ETHER_ARC_ADR(dev->base_addr));
+ writel((dev->dev_addr[0]<<24) |
+ (dev->dev_addr[1]<<16) |
+ (dev->dev_addr[2]<<8) |
+ dev->dev_addr[3],
+ ETHER_ARC_DATA(dev->base_addr));
+
+ writew(4,ETHER_ARC_ADR(dev->base_addr));
+ tmp=readl(ETHER_ARC_DATA(dev->base_addr));
+ tmp&=0xffff;
+ tmp|=(dev->dev_addr[4]<<24) | (dev->dev_addr[5]<<16);
+ writel(tmp, ETHER_ARC_DATA(dev->base_addr));
+ /* Enable this entry in the ARC */
+
+ writel(1,ETHER_ARC_ENA(dev->base_addr));
+
+ return;
+}
+
+
+static void ether00_reset(struct net_device *dev)
+{
+ /* reset the controller */
+ writew(ETHER_MAC_CTL_RESET_MSK,ETHER_MAC_CTL(dev->base_addr));
+
+ /*
+ * Make sure we're not going to send anything
+ */
+
+ writew(ETHER_TX_CTL_TXHALT_MSK,ETHER_TX_CTL(dev->base_addr));
+
+ /*
+ * Make sure we're not going to receive anything
+ */
+ writew(ETHER_RX_CTL_RXHALT_MSK,ETHER_RX_CTL(dev->base_addr));
+
+ /*
+ * Disable Interrupts for now, and set the burst size to 8 bytes
+ */
+
+ writel(ETHER_DMA_CTL_INTMASK_MSK |
+ ((8 << ETHER_DMA_CTL_DMBURST_OFST) & ETHER_DMA_CTL_DMBURST_MSK)
+ |(2<<ETHER_DMA_CTL_RXALIGN_OFST),
+ ETHER_DMA_CTL(dev->base_addr));
+
+
+ /*
+ * Set TxThrsh - start transmitting a packet after 1514
+ * bytes or when a packet is complete, whichever comes first
+ */
+ writew(1514,ETHER_TXTHRSH(dev->base_addr));
+
+ /*
+ * Set TxPollCtr. Each cycle is
+ * 61.44 microseconds with a 33 MHz bus
+ */
+ writew(1,ETHER_TXPOLLCTR(dev->base_addr));
+
+ /*
+ * Set Rx_Ctl - Turn off reception and let RxData turn it
+ * on later
+ */
+ writew(ETHER_RX_CTL_RXHALT_MSK,ETHER_RX_CTL(dev->base_addr));
+
+}
+
+
+static void ether00_set_multicast(struct net_device* dev)
+{
+ int count=dev->mc_count;
+
+ /* Set promiscuous mode if it's asked for. */
+
+ if (dev->flags&IFF_PROMISC){
+
+ writew( ETHER_ARC_CTL_COMPEN_MSK |
+ ETHER_ARC_CTL_BROADACC_MSK |
+ ETHER_ARC_CTL_GROUPACC_MSK |
+ ETHER_ARC_CTL_STATIONACC_MSK,
+ ETHER_ARC_CTL(dev->base_addr));
+ return;
+ }
+
+ /*
+ * Get all multicast packets if required, or if there are too
+ * many addresses to fit in hardware
+ */
+ if (dev->flags & IFF_ALLMULTI){
+ writew( ETHER_ARC_CTL_COMPEN_MSK |
+ ETHER_ARC_CTL_GROUPACC_MSK |
+ ETHER_ARC_CTL_BROADACC_MSK,
+ ETHER_ARC_CTL(dev->base_addr));
+ return;
+ }
+ if (dev->mc_count > (ETHER_ARC_SIZE - 1)){
+
+ printk(KERN_WARNING "Too many multicast addresses for hardware to filter - receiving all multicast packets\n");
+ writew( ETHER_ARC_CTL_COMPEN_MSK |
+ ETHER_ARC_CTL_GROUPACC_MSK |
+ ETHER_ARC_CTL_BROADACC_MSK,
+ ETHER_ARC_CTL(dev->base_addr));
+ return;
+ }
+
+ if(dev->mc_count){
+ struct dev_mc_list *mc_list_ent=dev->mc_list;
+ unsigned int temp,i;
+ DEBUG(printk("mc_count=%d mc_list=%#x\n",dev-> mc_count, dev->mc_list));
+ DEBUG(printk("mc addr=%02#x%02x%02x%02x%02x%02x\n",
+ mc_list_ent->dmi_addr[5],
+ mc_list_ent->dmi_addr[4],
+ mc_list_ent->dmi_addr[3],
+ mc_list_ent->dmi_addr[2],
+ mc_list_ent->dmi_addr[1],
+ mc_list_ent->dmi_addr[0]);)
+
+ /*
+ * The first 6 bytes are the MAC address, so
+ * don't change them!
+ */
+ writew(4,ETHER_ARC_ADR(dev->base_addr));
+ temp=readl(ETHER_ARC_DATA(dev->base_addr));
+ temp&=0xffff0000;
+
+ /* Disable the current multicast stuff */
+ writel(1,ETHER_ARC_ENA(dev->base_addr));
+
+ for(;;){
+ temp|=mc_list_ent->dmi_addr[1] |
+ mc_list_ent->dmi_addr[0]<<8;
+ writel(temp,ETHER_ARC_DATA(dev->base_addr));
+
+ i=readl(ETHER_ARC_ADR(dev->base_addr));
+ writew(i+4,ETHER_ARC_ADR(dev->base_addr));
+
+ temp=mc_list_ent->dmi_addr[5]|
+ mc_list_ent->dmi_addr[4]<<8 |
+ mc_list_ent->dmi_addr[3]<<16 |
+ mc_list_ent->dmi_addr[2]<<24;
+ writel(temp,ETHER_ARC_DATA(dev->base_addr));
+
+ count--;
+ if(!mc_list_ent->next || !count){
+ break;
+ }
+ DEBUG(printk("mc_list_next=%#x\n",mc_list_ent->next);)
+ mc_list_ent=mc_list_ent->next;
+
+
+ i=readl(ETHER_ARC_ADR(dev->base_addr));
+ writel(i+4,ETHER_ARC_ADR(dev->base_addr));
+
+ temp=mc_list_ent->dmi_addr[3]|
+ mc_list_ent->dmi_addr[2]<<8 |
+ mc_list_ent->dmi_addr[1]<<16 |
+ mc_list_ent->dmi_addr[0]<<24;
+ writel(temp,ETHER_ARC_DATA(dev->base_addr));
+
+ i=readl(ETHER_ARC_ADR(dev->base_addr));
+ writel(i+4,ETHER_ARC_ADR(dev->base_addr));
+
+ temp=mc_list_ent->dmi_addr[4]<<16 |
+ mc_list_ent->dmi_addr[5]<<24;
+
+ writel(temp,ETHER_ARC_DATA(dev->base_addr));
+
+ count--;
+ if(!mc_list_ent->next || !count){
+ break;
+ }
+ mc_list_ent=mc_list_ent->next;
+ }
+
+
+ if(count)
+ printk(KERN_WARNING "Multicast list size error\n");
+
+
+ writew( ETHER_ARC_CTL_BROADACC_MSK|
+ ETHER_ARC_CTL_COMPEN_MSK,
+ ETHER_ARC_CTL(dev->base_addr));
+
+ }
+
+ /* enable the active ARC enties */
+ writew((1<<(dev->mc_count+2))-1,ETHER_ARC_ENA(dev->base_addr));
+}
+
+
+static int ether00_open(struct net_device* dev)
+{
+ int result,tmp;
+ struct net_priv* priv;
+
+ if (!is_valid_ether_addr(dev->dev_addr))
+ return -EINVAL;
+
+ dev->base_addr=(unsigned int)ioremap_nocache(base,SZ_4K);
+
+ dev->irq=irq;
+
+ /* Allocate private memory */
+ dev->priv=kmalloc(sizeof(struct net_priv),GFP_KERNEL);
+ if(!dev->priv)
+ return -ENOMEM;
+ memset(dev->priv,0,sizeof(struct net_priv));
+ priv=(struct net_priv*)dev->priv;
+ priv->tq_memupdate.routine=ether00_mem_update;
+ priv->tq_memupdate.data=(void*) dev;
+ spin_lock_init(&priv->dma_lock);
+
+ /* Install interrupt handlers */
+ result=request_irq(dev->irq,ether00_int,0,"ether00",dev);
+ if(result)
+ goto open_err1;
+
+ result=request_irq(phy_irq,ether00_phy_int,0,"ether00_phy",dev);
+ if(result)
+ goto open_err2;
+
+ ether00_reset(dev);
+ result=ether00_mem_init(dev);
+ if(result)
+ goto open_err3;
+
+
+ ether00_setup_ethernet_address(dev);
+
+ ether00_set_multicast(dev);
+
+ result=ether00_write_phy(dev,PHY_CONTROL, PHY_CONTROL_ANEGEN_MSK | PHY_CONTROL_RANEG_MSK);
+ if(result)
+ goto open_err4;
+ result=ether00_write_phy(dev,PHY_IRQ_CONTROL, PHY_IRQ_CONTROL_LS_CHG_IE_MSK |
+ PHY_IRQ_CONTROL_ANEG_COMP_IE_MSK);
+ if(result)
+ goto open_err4;
+
+ /* Start the device enable interrupts */
+ writew(ETHER_RX_CTL_RXEN_MSK
+// | ETHER_RX_CTL_STRIPCRC_MSK
+ | ETHER_RX_CTL_ENGOOD_MSK
+ | ETHER_RX_CTL_ENRXPAR_MSK| ETHER_RX_CTL_ENLONGERR_MSK
+ | ETHER_RX_CTL_ENOVER_MSK| ETHER_RX_CTL_ENCRCERR_MSK,
+ ETHER_RX_CTL(dev->base_addr));
+
+ writew(ETHER_TX_CTL_TXEN_MSK|
+ ETHER_TX_CTL_ENEXDEFER_MSK|
+ ETHER_TX_CTL_ENLCARR_MSK|
+ ETHER_TX_CTL_ENEXCOLL_MSK|
+ ETHER_TX_CTL_ENLATECOLL_MSK|
+ ETHER_TX_CTL_ENTXPAR_MSK|
+ ETHER_TX_CTL_ENCOMP_MSK,
+ ETHER_TX_CTL(dev->base_addr));
+
+ tmp=readl(ETHER_DMA_CTL(dev->base_addr));
+ writel(tmp&~ETHER_DMA_CTL_INTMASK_MSK,ETHER_DMA_CTL(dev->base_addr));
+
+ return 0;
+
+ open_err4:
+ ether00_reset(dev);
+ open_err3:
+ free_irq(2,dev);
+ open_err2:
+ free_irq(dev->irq,dev);
+ open_err1:
+ iounmap((void*)dev->base_addr);
+ kfree(dev->priv);
+ return result;
+
+}
+
+
+static int ether00_tx(struct sk_buff* skb, struct net_device* dev)
+{
+ struct net_priv *priv=dev->priv;
+ struct tx_fda_ent *fda_ptr;
+ unsigned long flags;
+ int retcode = 0;
+
+ /*
+ * Find an empty slot in which to stick the frame
+ */
+
+ spin_lock_irqsave(&priv->dma_lock,flags);
+
+ fda_ptr=(struct tx_fda_ent*) priv->tx_head;
+
+ priv->tx_head =(unsigned int) __dma_va(fda_ptr->fd.FDNext);
+
+ /* Write the skb data from the cache*/
+ consistent_sync(skb->data,skb->len,PCI_DMA_TODEVICE);
+ fda_ptr->bd.BuffData=(char*)__pa(skb->data);
+ fda_ptr->bd.BuffLength=(unsigned short)skb->len;
+ /* Save the pointer to the skb for freeing later */
+ fda_ptr->fd.FDSystem=(unsigned int)skb;
+ fda_ptr->fd.FDStat=0;
+ /* Pass ownership of the buffers to the controller */
+ fda_ptr->fd.FDCtl=1;
+ fda_ptr->fd.FDCtl|=FDCTL_COWNSFD_MSK;
+
+ fda_ptr=(struct tx_fda_ent*) priv->tx_head;
+
+ /* If the next buffer in the list is full, stop the queue */
+ if (fda_ptr->fd.FDSystem){
+ netif_stop_queue(dev);
+ priv->queue_stopped=1;
+ }
+
+ spin_unlock_irqrestore(&priv->dma_lock,flags);
+ return retcode;
+}
+
+static void ether00_tx_timeout(struct net_device* dev)
+{
+ /*
+ * Something really bad has happened here. This
+ * SHOULD never happen. Given that, it's difficult
+ * to know what to do to recover. For now we'll just
+ * count the error, and restart the queue.
+ */
+
+ struct net_priv *priv=dev->priv;
+
+ priv->stats.tx_errors++;
+
+ priv->queue_stopped=0;
+ netif_wake_queue(dev);
+
+}
+
+static struct net_device_stats *ether00_stats(struct net_device* dev)
+{
+ struct net_priv *priv=dev->priv;
+ return &priv->stats;
+}
+
+
+static int ether00_stop(struct net_device* dev)
+{
+ struct net_priv *priv=dev->priv;
+ int tmp;
+
+ /* Stop/disable the device. */
+ tmp=readw(ETHER_RX_CTL(dev->base_addr));
+ tmp&=~(ETHER_RX_CTL_RXEN_MSK | ETHER_RX_CTL_ENGOOD_MSK);
+ tmp|=ETHER_RX_CTL_RXHALT_MSK;
+ writew(tmp,ETHER_RX_CTL(dev->base_addr));
+
+ tmp=readl(ETHER_TX_CTL(dev->base_addr));
+ tmp&=~ETHER_TX_CTL_TXEN_MSK;
+ tmp|=ETHER_TX_CTL_TXHALT_MSK;
+ writel(tmp,ETHER_TX_CTL(dev->base_addr));
+
+ /* Free up system resources */
+ free_irq(dev->irq,dev);
+ free_irq(2,dev);
+ iounmap(priv->dma_data);
+ iounmap((void*)dev->base_addr);
+ kfree(priv);
+
+ return 0;
+}
+
+
+static void ether00_get_ethernet_address(struct net_device* dev)
+{
+ struct mtd_info *mymtd=NULL;
+ int i;
+ size_t retlen;
+
+ /*
+ * For the Epxa10 dev board (camelot), the ethernet MAC
+ * address is of the form 00:aa:aa:00:xx:xx where
+ * 00:aa:aa is the Altera vendor ID and xx:xx is the
+ * last 2 bytes of the board serial number, as programmed
+ * into the OTP area of the flash device on EBI1. If this
+ * isn't an expa10 dev board, or there's no mtd support to
+ * read the serial number from flash then we'll force the
+ * use to set their own mac address using ifconfig.
+ */
+
+#ifdef CONFIG_ARCH_CAMELOT
+#ifdef CONFIG_MTD
+ /* get the mtd_info structure for the first mtd device*/
+ for(i=0;i<MAX_MTD_DEVICES;i++){
+ mymtd=get_mtd_device(NULL,i);
+ if(!mymtd||!strcmp(mymtd->name,"EPXA10DB flash"))
+ break;
+ }
+
+ if(!mymtd || !mymtd->read_user_prot_reg){
+ printk(KERN_WARNING "%s: Failed to read MAC address from flash\n",dev->name);
+ }else{
+ mymtd->read_user_prot_reg(mymtd,2,1,&retlen,&dev->dev_addr[5]);
+ mymtd->read_user_prot_reg(mymtd,3,1,&retlen,&dev->dev_addr[4]);
+ dev->dev_addr[3]=0;
+ dev->dev_addr[2]=vendor_id[1];
+ dev->dev_addr[1]=vendor_id[0];
+ dev->dev_addr[0]=0;
+ }
+#else
+ printk(KERN_WARNING "%s: MTD support required to read MAC address from EPXA10 dev board\n", dev->name);
+#endif
+#endif
+
+ if (!is_valid_ether_addr(dev->dev_addr))
+ printk("%s: Invalid ethernet MAC address. Please set using "
+ "ifconfig\n", dev->name);
+
+}
+
+static int ether00_init(struct net_device* dev)
+{
+
+ ether_setup(dev);
+
+ dev->open=ether00_open;
+ dev->stop=ether00_stop;
+ dev->set_multicast_list=ether00_set_multicast;
+ dev->hard_start_xmit=ether00_tx;
+ dev->get_stats=ether00_stats;
+ dev->tx_timeout=ether00_tx_timeout;
+ dev->watchdog_timeo=TX_TIMEOUT;
+
+ ether00_get_ethernet_address(dev);
+
+ SET_MODULE_OWNER(dev);
+ return 0;
+}
+
+
+struct net_device ether00_dev={
+ init:ether00_init,
+ name:"eth%d",
+};
+
+
+static void __exit ether00_cleanup_module(void)
+{
+ unregister_netdev(ðer00_dev);
+}
+module_exit(ether00_cleanup_module);
+
+
+static int __init ether00_mod_init(void)
+{
+ int result;
+
+ result=register_netdev(ðer00_dev);
+ if(result)
+ printk("Ether00: Error %i registering driver\n",result);
+ return result;
+}
+
+module_init(ether00_mod_init);
+
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)