--- /dev/null
+/* atarilance.c: Ethernet driver for VME Lance cards on the Atari */
+/*
+ Written 1995/96 by Roman Hodek (Roman.Hodek@informatik.uni-erlangen.de)
+
+ This software may be used and distributed according to the terms
+ of the GNU General Public License, incorporated herein by reference.
+
+ This drivers was written with the following sources of reference:
+ - The driver for the Riebl Lance card by the TU Vienna.
+ - The modified TUW driver for PAM's VME cards
+ - The PC-Linux driver for Lance cards (but this is for bus master
+ cards, not the shared memory ones)
+ - The Amiga Ariadne driver
+
+ v1.0: (in 1.2.13pl4/0.9.13)
+ Initial version
+ v1.1: (in 1.2.13pl5)
+ more comments
+ deleted some debugging stuff
+ optimized register access (keep AREG pointing to CSR0)
+ following AMD, CSR0_STRT should be set only after IDON is detected
+ use memcpy() for data transfers, that also employs long word moves
+ better probe procedure for 24-bit systems
+ non-VME-RieblCards need extra delays in memcpy
+ must also do write test, since 0xfxe00000 may hit ROM
+ use 8/32 tx/rx buffers, which should give better NFS performance;
+ this is made possible by shifting the last packet buffer after the
+ RieblCard reserved area
+ v1.2: (in 1.2.13pl8)
+ again fixed probing for the Falcon; 0xfe01000 hits phys. 0x00010000
+ and thus RAM, in case of no Lance found all memory contents have to
+ be restored!
+ Now possible to compile as module.
+ v1.3: 03/30/96 Jes Sorensen, Roman (in 1.3)
+ Several little 1.3 adaptions
+ When the lance is stopped it jumps back into little-endian
+ mode. It is therefore necessary to put it back where it
+ belongs, in big endian mode, in order to make things work.
+ This might be the reason why multicast-mode didn't work
+ before, but I'm not able to test it as I only got an Amiga
+ (we had similar problems with the A2065 driver).
+
+*/
+
+static char version[] = "atarilance.c: v1.3 04/04/96 "
+ "Roman.Hodek@informatik.uni-erlangen.de\n";
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/io.h>
+
+/* Debug level:
+ * 0 = silent, print only serious errors
+ * 1 = normal, print error messages
+ * 2 = debug, print debug infos
+ * 3 = debug, print even more debug infos (packet data)
+ */
+
+#define LANCE_DEBUG 1
+
+#ifdef LANCE_DEBUG
+static int lance_debug = LANCE_DEBUG;
+#else
+static int lance_debug = 1;
+#endif
+module_param(lance_debug, int, 0);
+MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)");
+MODULE_LICENSE("GPL");
+
+/* Print debug messages on probing? */
+#undef LANCE_DEBUG_PROBE
+
+#define DPRINTK(n,a) \
+ do { \
+ if (lance_debug >= n) \
+ printk a; \
+ } while( 0 )
+
+#ifdef LANCE_DEBUG_PROBE
+# define PROBE_PRINT(a) printk a
+#else
+# define PROBE_PRINT(a)
+#endif
+
+/* These define the number of Rx and Tx buffers as log2. (Only powers
+ * of two are valid)
+ * Much more rx buffers (32) are reserved than tx buffers (8), since receiving
+ * is more time critical then sending and packets may have to remain in the
+ * board's memory when main memory is low.
+ */
+
+#define TX_LOG_RING_SIZE 3
+#define RX_LOG_RING_SIZE 5
+
+/* These are the derived values */
+
+#define TX_RING_SIZE (1 << TX_LOG_RING_SIZE)
+#define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5)
+#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
+
+#define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
+#define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
+#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
+
+#define TX_TIMEOUT (HZ/5)
+
+/* The LANCE Rx and Tx ring descriptors. */
+struct lance_rx_head {
+ unsigned short base; /* Low word of base addr */
+ volatile unsigned char flag;
+ unsigned char base_hi; /* High word of base addr (unused) */
+ short buf_length; /* This length is 2s complement! */
+ volatile short msg_length; /* This length is "normal". */
+};
+
+struct lance_tx_head {
+ unsigned short base; /* Low word of base addr */
+ volatile unsigned char flag;
+ unsigned char base_hi; /* High word of base addr (unused) */
+ short length; /* Length is 2s complement! */
+ volatile short misc;
+};
+
+struct ringdesc {
+ unsigned short adr_lo; /* Low 16 bits of address */
+ unsigned char len; /* Length bits */
+ unsigned char adr_hi; /* High 8 bits of address (unused) */
+};
+
+/* The LANCE initialization block, described in databook. */
+struct lance_init_block {
+ unsigned short mode; /* Pre-set mode */
+ unsigned char hwaddr[6]; /* Physical ethernet address */
+ unsigned filter[2]; /* Multicast filter (unused). */
+ /* Receive and transmit ring base, along with length bits. */
+ struct ringdesc rx_ring;
+ struct ringdesc tx_ring;
+};
+
+/* The whole layout of the Lance shared memory */
+struct lance_memory {
+ struct lance_init_block init;
+ struct lance_tx_head tx_head[TX_RING_SIZE];
+ struct lance_rx_head rx_head[RX_RING_SIZE];
+ char packet_area[0]; /* packet data follow after the
+ * init block and the ring
+ * descriptors and are located
+ * at runtime */
+};
+
+/* RieblCard specifics:
+ * The original TOS driver for these cards reserves the area from offset
+ * 0xee70 to 0xeebb for storing configuration data. Of interest to us is the
+ * Ethernet address there, and the magic for verifying the data's validity.
+ * The reserved area isn't touch by packet buffers. Furthermore, offset 0xfffe
+ * is reserved for the interrupt vector number.
+ */
+#define RIEBL_RSVD_START 0xee70
+#define RIEBL_RSVD_END 0xeec0
+#define RIEBL_MAGIC 0x09051990
+#define RIEBL_MAGIC_ADDR ((unsigned long *)(((char *)MEM) + 0xee8a))
+#define RIEBL_HWADDR_ADDR ((unsigned char *)(((char *)MEM) + 0xee8e))
+#define RIEBL_IVEC_ADDR ((unsigned short *)(((char *)MEM) + 0xfffe))
+
+/* This is a default address for the old RieblCards without a battery
+ * that have no ethernet address at boot time. 00:00:36:04 is the
+ * prefix for Riebl cards, the 00:00 at the end is arbitrary.
+ */
+
+static unsigned char OldRieblDefHwaddr[6] = {
+ 0x00, 0x00, 0x36, 0x04, 0x00, 0x00
+};
+
+
+/* I/O registers of the Lance chip */
+
+struct lance_ioreg {
+/* base+0x0 */ volatile unsigned short data;
+/* base+0x2 */ volatile unsigned short addr;
+ unsigned char _dummy1[3];
+/* base+0x7 */ volatile unsigned char ivec;
+ unsigned char _dummy2[5];
+/* base+0xd */ volatile unsigned char eeprom;
+ unsigned char _dummy3;
+/* base+0xf */ volatile unsigned char mem;
+};
+
+/* Types of boards this driver supports */
+
+enum lance_type {
+ OLD_RIEBL, /* old Riebl card without battery */
+ NEW_RIEBL, /* new Riebl card with battery */
+ PAM_CARD /* PAM card with EEPROM */
+};
+
+static char *lance_names[] = {
+ "Riebl-Card (without battery)",
+ "Riebl-Card (with battery)",
+ "PAM intern card"
+};
+
+/* The driver's private device structure */
+
+struct lance_private {
+ enum lance_type cardtype;
+ struct lance_ioreg *iobase;
+ struct lance_memory *mem;
+ int cur_rx, cur_tx; /* The next free ring entry */
+ int dirty_tx; /* Ring entries to be freed. */
+ /* copy function */
+ void *(*memcpy_f)( void *, const void *, size_t );
+/* This must be long for set_bit() */
+ long tx_full;
+ spinlock_t devlock;
+};
+
+/* I/O register access macros */
+
+#define MEM lp->mem
+#define DREG IO->data
+#define AREG IO->addr
+#define REGA(a) (*( AREG = (a), &DREG ))
+
+/* Definitions for packet buffer access: */
+#define PKT_BUF_SZ 1544
+/* Get the address of a packet buffer corresponding to a given buffer head */
+#define PKTBUF_ADDR(head) (((unsigned char *)(MEM)) + (head)->base)
+
+/* Possible memory/IO addresses for probing */
+
+static struct lance_addr {
+ unsigned long memaddr;
+ unsigned long ioaddr;
+ int slow_flag;
+} lance_addr_list[] = {
+ { 0xfe010000, 0xfe00fff0, 0 }, /* RieblCard VME in TT */
+ { 0xffc10000, 0xffc0fff0, 0 }, /* RieblCard VME in MegaSTE
+ (highest byte stripped) */
+ { 0xffe00000, 0xffff7000, 1 }, /* RieblCard in ST
+ (highest byte stripped) */
+ { 0xffd00000, 0xffff7000, 1 }, /* RieblCard in ST with hw modif. to
+ avoid conflict with ROM
+ (highest byte stripped) */
+ { 0xffcf0000, 0xffcffff0, 0 }, /* PAMCard VME in TT and MSTE
+ (highest byte stripped) */
+ { 0xfecf0000, 0xfecffff0, 0 }, /* Rhotron's PAMCard VME in TT and MSTE
+ (highest byte stripped) */
+};
+
+#define N_LANCE_ADDR ARRAY_SIZE(lance_addr_list)
+
+
+/* Definitions for the Lance */
+
+/* tx_head flags */
+#define TMD1_ENP 0x01 /* end of packet */
+#define TMD1_STP 0x02 /* start of packet */
+#define TMD1_DEF 0x04 /* deferred */
+#define TMD1_ONE 0x08 /* one retry needed */
+#define TMD1_MORE 0x10 /* more than one retry needed */
+#define TMD1_ERR 0x40 /* error summary */
+#define TMD1_OWN 0x80 /* ownership (set: chip owns) */
+
+#define TMD1_OWN_CHIP TMD1_OWN
+#define TMD1_OWN_HOST 0
+
+/* tx_head misc field */
+#define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */
+#define TMD3_RTRY 0x0400 /* failed after 16 retries */
+#define TMD3_LCAR 0x0800 /* carrier lost */
+#define TMD3_LCOL 0x1000 /* late collision */
+#define TMD3_UFLO 0x4000 /* underflow (late memory) */
+#define TMD3_BUFF 0x8000 /* buffering error (no ENP) */
+
+/* rx_head flags */
+#define RMD1_ENP 0x01 /* end of packet */
+#define RMD1_STP 0x02 /* start of packet */
+#define RMD1_BUFF 0x04 /* buffer error */
+#define RMD1_CRC 0x08 /* CRC error */
+#define RMD1_OFLO 0x10 /* overflow */
+#define RMD1_FRAM 0x20 /* framing error */
+#define RMD1_ERR 0x40 /* error summary */
+#define RMD1_OWN 0x80 /* ownership (set: ship owns) */
+
+#define RMD1_OWN_CHIP RMD1_OWN
+#define RMD1_OWN_HOST 0
+
+/* register names */
+#define CSR0 0 /* mode/status */
+#define CSR1 1 /* init block addr (low) */
+#define CSR2 2 /* init block addr (high) */
+#define CSR3 3 /* misc */
+#define CSR8 8 /* address filter */
+#define CSR15 15 /* promiscuous mode */
+
+/* CSR0 */
+/* (R=readable, W=writeable, S=set on write, C=clear on write) */
+#define CSR0_INIT 0x0001 /* initialize (RS) */
+#define CSR0_STRT 0x0002 /* start (RS) */
+#define CSR0_STOP 0x0004 /* stop (RS) */
+#define CSR0_TDMD 0x0008 /* transmit demand (RS) */
+#define CSR0_TXON 0x0010 /* transmitter on (R) */
+#define CSR0_RXON 0x0020 /* receiver on (R) */
+#define CSR0_INEA 0x0040 /* interrupt enable (RW) */
+#define CSR0_INTR 0x0080 /* interrupt active (R) */
+#define CSR0_IDON 0x0100 /* initialization done (RC) */
+#define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */
+#define CSR0_RINT 0x0400 /* receiver interrupt (RC) */
+#define CSR0_MERR 0x0800 /* memory error (RC) */
+#define CSR0_MISS 0x1000 /* missed frame (RC) */
+#define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */
+#define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */
+#define CSR0_ERR 0x8000 /* error (RC) */
+
+/* CSR3 */
+#define CSR3_BCON 0x0001 /* byte control */
+#define CSR3_ACON 0x0002 /* ALE control */
+#define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
+
+
+
+/***************************** Prototypes *****************************/
+
+static unsigned long lance_probe1( struct net_device *dev, struct lance_addr
+ *init_rec );
+static int lance_open( struct net_device *dev );
+static void lance_init_ring( struct net_device *dev );
+static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev );
+static irqreturn_t lance_interrupt( int irq, void *dev_id );
+static int lance_rx( struct net_device *dev );
+static int lance_close( struct net_device *dev );
+static void set_multicast_list( struct net_device *dev );
+static int lance_set_mac_address( struct net_device *dev, void *addr );
+static void lance_tx_timeout (struct net_device *dev);
+
+/************************* End of Prototypes **************************/
+
+
+
+
+
+static void *slow_memcpy( void *dst, const void *src, size_t len )
+
+{ char *cto = dst;
+ const char *cfrom = src;
+
+ while( len-- ) {
+ *cto++ = *cfrom++;
+ MFPDELAY();
+ }
+ return dst;
+}
+
+
+struct net_device * __init atarilance_probe(int unit)
+{
+ int i;
+ static int found;
+ struct net_device *dev;
+ int err = -ENODEV;
+
+ if (!MACH_IS_ATARI || found)
+ /* Assume there's only one board possible... That seems true, since
+ * the Riebl/PAM board's address cannot be changed. */
+ return ERR_PTR(-ENODEV);
+
+ dev = alloc_etherdev(sizeof(struct lance_private));
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+ if (unit >= 0) {
+ sprintf(dev->name, "eth%d", unit);
+ netdev_boot_setup_check(dev);
+ }
+
+ for( i = 0; i < N_LANCE_ADDR; ++i ) {
+ if (lance_probe1( dev, &lance_addr_list[i] )) {
+ found = 1;
+ err = register_netdev(dev);
+ if (!err)
+ return dev;
+ free_irq(dev->irq, dev);
+ break;
+ }
+ }
+ free_netdev(dev);
+ return ERR_PTR(err);
+}
+
+
+/* Derived from hwreg_present() in atari/config.c: */
+
+static noinline int __init addr_accessible(volatile void *regp, int wordflag,
+ int writeflag)
+{
+ int ret;
+ unsigned long flags;
+ long *vbr, save_berr;
+
+ local_irq_save(flags);
+
+ __asm__ __volatile__ ( "movec %/vbr,%0" : "=r" (vbr) : );
+ save_berr = vbr[2];
+
+ __asm__ __volatile__
+ ( "movel %/sp,%/d1\n\t"
+ "movel #Lberr,%2@\n\t"
+ "moveq #0,%0\n\t"
+ "tstl %3\n\t"
+ "bne 1f\n\t"
+ "moveb %1@,%/d0\n\t"
+ "nop \n\t"
+ "bra 2f\n"
+"1: movew %1@,%/d0\n\t"
+ "nop \n"
+"2: tstl %4\n\t"
+ "beq 2f\n\t"
+ "tstl %3\n\t"
+ "bne 1f\n\t"
+ "clrb %1@\n\t"
+ "nop \n\t"
+ "moveb %/d0,%1@\n\t"
+ "nop \n\t"
+ "bra 2f\n"
+"1: clrw %1@\n\t"
+ "nop \n\t"
+ "movew %/d0,%1@\n\t"
+ "nop \n"
+"2: moveq #1,%0\n"
+"Lberr: movel %/d1,%/sp"
+ : "=&d" (ret)
+ : "a" (regp), "a" (&vbr[2]), "rm" (wordflag), "rm" (writeflag)
+ : "d0", "d1", "memory"
+ );
+
+ vbr[2] = save_berr;
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+static const struct net_device_ops lance_netdev_ops = {
+ .ndo_open = lance_open,
+ .ndo_stop = lance_close,
+ .ndo_start_xmit = lance_start_xmit,
+ .ndo_set_rx_mode = set_multicast_list,
+ .ndo_set_mac_address = lance_set_mac_address,
+ .ndo_tx_timeout = lance_tx_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = eth_change_mtu,
+};
+
+static unsigned long __init lance_probe1( struct net_device *dev,
+ struct lance_addr *init_rec )
+{
+ volatile unsigned short *memaddr =
+ (volatile unsigned short *)init_rec->memaddr;
+ volatile unsigned short *ioaddr =
+ (volatile unsigned short *)init_rec->ioaddr;
+ struct lance_private *lp;
+ struct lance_ioreg *IO;
+ int i;
+ static int did_version;
+ unsigned short save1, save2;
+
+ PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
+ (long)memaddr, (long)ioaddr ));
+
+ /* Test whether memory readable and writable */
+ PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
+ if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;
+
+ /* Written values should come back... */
+ PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
+ save1 = *memaddr;
+ *memaddr = 0x0001;
+ if (*memaddr != 0x0001) goto probe_fail;
+ PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
+ *memaddr = 0x0000;
+ if (*memaddr != 0x0000) goto probe_fail;
+ *memaddr = save1;
+
+ /* First port should be readable and writable */
+ PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
+ if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;
+
+ /* and written values should be readable */
+ PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
+ save2 = ioaddr[1];
+ ioaddr[1] = 0x0001;
+ if (ioaddr[1] != 0x0001) goto probe_fail;
+
+ /* The CSR0_INIT bit should not be readable */
+ PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
+ save1 = ioaddr[0];
+ ioaddr[1] = CSR0;
+ ioaddr[0] = CSR0_INIT | CSR0_STOP;
+ if (ioaddr[0] != CSR0_STOP) {
+ ioaddr[0] = save1;
+ ioaddr[1] = save2;
+ goto probe_fail;
+ }
+ PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
+ ioaddr[0] = CSR0_STOP;
+ if (ioaddr[0] != CSR0_STOP) {
+ ioaddr[0] = save1;
+ ioaddr[1] = save2;
+ goto probe_fail;
+ }
+
+ /* Now ok... */
+ PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
+ goto probe_ok;
+
+ probe_fail:
+ return 0;
+
+ probe_ok:
+ lp = netdev_priv(dev);
+ MEM = (struct lance_memory *)memaddr;
+ IO = lp->iobase = (struct lance_ioreg *)ioaddr;
+ dev->base_addr = (unsigned long)ioaddr; /* informational only */
+ lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;
+
+ REGA( CSR0 ) = CSR0_STOP;
+
+ /* Now test for type: If the eeprom I/O port is readable, it is a
+ * PAM card */
+ if (addr_accessible( &(IO->eeprom), 0, 0 )) {
+ /* Switch back to Ram */
+ i = IO->mem;
+ lp->cardtype = PAM_CARD;
+ }
+ else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
+ lp->cardtype = NEW_RIEBL;
+ }
+ else
+ lp->cardtype = OLD_RIEBL;
+
+ if (lp->cardtype == PAM_CARD ||
+ memaddr == (unsigned short *)0xffe00000) {
+ /* PAMs card and Riebl on ST use level 5 autovector */
+ if (request_irq(IRQ_AUTO_5, lance_interrupt, 0,
+ "PAM,Riebl-ST Ethernet", dev)) {
+ printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 );
+ return 0;
+ }
+ dev->irq = IRQ_AUTO_5;
+ }
+ else {
+ /* For VME-RieblCards, request a free VME int */
+ unsigned int irq = atari_register_vme_int();
+ if (!irq) {
+ printk( "Lance: request for VME interrupt failed\n" );
+ return 0;
+ }
+ if (request_irq(irq, lance_interrupt, 0, "Riebl-VME Ethernet",
+ dev)) {
+ printk( "Lance: request for irq %u failed\n", irq );
+ return 0;
+ }
+ dev->irq = irq;
+ }
+
+ printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
+ dev->name, lance_names[lp->cardtype],
+ (unsigned long)ioaddr,
+ (unsigned long)memaddr,
+ dev->irq,
+ init_rec->slow_flag ? " (slow memcpy)" : "" );
+
+ /* Get the ethernet address */
+ switch( lp->cardtype ) {
+ case OLD_RIEBL:
+ /* No ethernet address! (Set some default address) */
+ memcpy(dev->dev_addr, OldRieblDefHwaddr, ETH_ALEN);
+ break;
+ case NEW_RIEBL:
+ lp->memcpy_f(dev->dev_addr, RIEBL_HWADDR_ADDR, ETH_ALEN);
+ break;
+ case PAM_CARD:
+ i = IO->eeprom;
+ for( i = 0; i < 6; ++i )
+ dev->dev_addr[i] =
+ ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
+ ((((unsigned short *)MEM)[i*2+1] & 0x0f));
+ i = IO->mem;
+ break;
+ }
+ printk("%pM\n", dev->dev_addr);
+ if (lp->cardtype == OLD_RIEBL) {
+ printk( "%s: Warning: This is a default ethernet address!\n",
+ dev->name );
+ printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
+ }
+
+ spin_lock_init(&lp->devlock);
+
+ MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
+ for( i = 0; i < 6; i++ )
+ MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
+ MEM->init.filter[0] = 0x00000000;
+ MEM->init.filter[1] = 0x00000000;
+ MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
+ MEM->init.rx_ring.adr_hi = 0;
+ MEM->init.rx_ring.len = RX_RING_LEN_BITS;
+ MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
+ MEM->init.tx_ring.adr_hi = 0;
+ MEM->init.tx_ring.len = TX_RING_LEN_BITS;
+
+ if (lp->cardtype == PAM_CARD)
+ IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
+ else
+ *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
+
+ if (did_version++ == 0)
+ DPRINTK( 1, ( version ));
+
+ dev->netdev_ops = &lance_netdev_ops;
+
+ /* XXX MSch */
+ dev->watchdog_timeo = TX_TIMEOUT;
+
+ return 1;
+}
+
+
+static int lance_open( struct net_device *dev )
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_ioreg *IO = lp->iobase;
+ int i;
+
+ DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
+
+ lance_init_ring(dev);
+ /* Re-initialize the LANCE, and start it when done. */
+
+ REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
+ REGA( CSR2 ) = 0;
+ REGA( CSR1 ) = 0;
+ REGA( CSR0 ) = CSR0_INIT;
+ /* From now on, AREG is kept to point to CSR0 */
+
+ i = 1000000;
+ while (--i > 0)
+ if (DREG & CSR0_IDON)
+ break;
+ if (i <= 0 || (DREG & CSR0_ERR)) {
+ DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
+ dev->name, i, DREG ));
+ DREG = CSR0_STOP;
+ return -EIO;
+ }
+ DREG = CSR0_IDON;
+ DREG = CSR0_STRT;
+ DREG = CSR0_INEA;
+
+ netif_start_queue (dev);
+
+ DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
+
+ return 0;
+}
+
+
+/* Initialize the LANCE Rx and Tx rings. */
+
+static void lance_init_ring( struct net_device *dev )
+{
+ struct lance_private *lp = netdev_priv(dev);
+ int i;
+ unsigned offset;
+
+ lp->tx_full = 0;
+ lp->cur_rx = lp->cur_tx = 0;
+ lp->dirty_tx = 0;
+
+ offset = offsetof( struct lance_memory, packet_area );
+
+/* If the packet buffer at offset 'o' would conflict with the reserved area
+ * of RieblCards, advance it */
+#define CHECK_OFFSET(o) \
+ do { \
+ if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
+ if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
+ : (o) < RIEBL_RSVD_END) \
+ (o) = RIEBL_RSVD_END; \
+ } \
+ } while(0)
+
+ for( i = 0; i < TX_RING_SIZE; i++ ) {
+ CHECK_OFFSET(offset);
+ MEM->tx_head[i].base = offset;
+ MEM->tx_head[i].flag = TMD1_OWN_HOST;
+ MEM->tx_head[i].base_hi = 0;
+ MEM->tx_head[i].length = 0;
+ MEM->tx_head[i].misc = 0;
+ offset += PKT_BUF_SZ;
+ }
+
+ for( i = 0; i < RX_RING_SIZE; i++ ) {
+ CHECK_OFFSET(offset);
+ MEM->rx_head[i].base = offset;
+ MEM->rx_head[i].flag = TMD1_OWN_CHIP;
+ MEM->rx_head[i].base_hi = 0;
+ MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
+ MEM->rx_head[i].msg_length = 0;
+ offset += PKT_BUF_SZ;
+ }
+}
+
+
+/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
+
+
+static void lance_tx_timeout (struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_ioreg *IO = lp->iobase;
+
+ AREG = CSR0;
+ DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
+ dev->name, DREG ));
+ DREG = CSR0_STOP;
+ /*
+ * Always set BSWP after a STOP as STOP puts it back into
+ * little endian mode.
+ */
+ REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
+ dev->stats.tx_errors++;
+#ifndef final_version
+ { int i;
+ DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
+ lp->dirty_tx, lp->cur_tx,
+ lp->tx_full ? " (full)" : "",
+ lp->cur_rx ));
+ for( i = 0 ; i < RX_RING_SIZE; i++ )
+ DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
+ i, MEM->rx_head[i].base,
+ -MEM->rx_head[i].buf_length,
+ MEM->rx_head[i].msg_length ));
+ for( i = 0 ; i < TX_RING_SIZE; i++ )
+ DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
+ i, MEM->tx_head[i].base,
+ -MEM->tx_head[i].length,
+ MEM->tx_head[i].misc ));
+ }
+#endif
+ /* XXX MSch: maybe purge/reinit ring here */
+ /* lance_restart, essentially */
+ lance_init_ring(dev);
+ REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
+ dev->trans_start = jiffies; /* prevent tx timeout */
+ netif_wake_queue(dev);
+}
+
+/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
+
+static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_ioreg *IO = lp->iobase;
+ int entry, len;
+ struct lance_tx_head *head;
+ unsigned long flags;
+
+ DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
+ dev->name, DREG ));
+
+
+ /* The old LANCE chips doesn't automatically pad buffers to min. size. */
+ len = skb->len;
+ if (len < ETH_ZLEN)
+ len = ETH_ZLEN;
+ /* PAM-Card has a bug: Can only send packets with even number of bytes! */
+ else if (lp->cardtype == PAM_CARD && (len & 1))
+ ++len;
+
+ if (len > skb->len) {
+ if (skb_padto(skb, len))
+ return NETDEV_TX_OK;
+ }
+
+ netif_stop_queue (dev);
+
+ /* Fill in a Tx ring entry */
+ if (lance_debug >= 3) {
+ printk( "%s: TX pkt type 0x%04x from %pM to %pM"
+ " data at 0x%08x len %d\n",
+ dev->name, ((u_short *)skb->data)[6],
+ &skb->data[6], skb->data,
+ (int)skb->data, (int)skb->len );
+ }
+
+ /* We're not prepared for the int until the last flags are set/reset. And
+ * the int may happen already after setting the OWN_CHIP... */
+ spin_lock_irqsave (&lp->devlock, flags);
+
+ /* Mask to ring buffer boundary. */
+ entry = lp->cur_tx & TX_RING_MOD_MASK;
+ head = &(MEM->tx_head[entry]);
+
+ /* Caution: the write order is important here, set the "ownership" bits
+ * last.
+ */
+
+
+ head->length = -len;
+ head->misc = 0;
+ lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
+ head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
+ dev->stats.tx_bytes += skb->len;
+ dev_kfree_skb( skb );
+ lp->cur_tx++;
+ while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
+ lp->cur_tx -= TX_RING_SIZE;
+ lp->dirty_tx -= TX_RING_SIZE;
+ }
+
+ /* Trigger an immediate send poll. */
+ DREG = CSR0_INEA | CSR0_TDMD;
+
+ if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
+ TMD1_OWN_HOST)
+ netif_start_queue (dev);
+ else
+ lp->tx_full = 1;
+ spin_unlock_irqrestore (&lp->devlock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+/* The LANCE interrupt handler. */
+
+static irqreturn_t lance_interrupt( int irq, void *dev_id )
+{
+ struct net_device *dev = dev_id;
+ struct lance_private *lp;
+ struct lance_ioreg *IO;
+ int csr0, boguscnt = 10;
+ int handled = 0;
+
+ if (dev == NULL) {
+ DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
+ return IRQ_NONE;
+ }
+
+ lp = netdev_priv(dev);
+ IO = lp->iobase;
+ spin_lock (&lp->devlock);
+
+ AREG = CSR0;
+
+ while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
+ --boguscnt >= 0) {
+ handled = 1;
+ /* Acknowledge all of the current interrupt sources ASAP. */
+ DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
+ CSR0_TDMD | CSR0_INEA);
+
+ DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
+ dev->name, csr0, DREG ));
+
+ if (csr0 & CSR0_RINT) /* Rx interrupt */
+ lance_rx( dev );
+
+ if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
+ int dirty_tx = lp->dirty_tx;
+
+ while( dirty_tx < lp->cur_tx) {
+ int entry = dirty_tx & TX_RING_MOD_MASK;
+ int status = MEM->tx_head[entry].flag;
+
+ if (status & TMD1_OWN_CHIP)
+ break; /* It still hasn't been Txed */
+
+ MEM->tx_head[entry].flag = 0;
+
+ if (status & TMD1_ERR) {
+ /* There was an major error, log it. */
+ int err_status = MEM->tx_head[entry].misc;
+ dev->stats.tx_errors++;
+ if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
+ if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
+ if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++;
+ if (err_status & TMD3_UFLO) {
+ /* Ackk! On FIFO errors the Tx unit is turned off! */
+ dev->stats.tx_fifo_errors++;
+ /* Remove this verbosity later! */
+ DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
+ dev->name, csr0 ));
+ /* Restart the chip. */
+ DREG = CSR0_STRT;
+ }
+ } else {
+ if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
+ dev->stats.collisions++;
+ dev->stats.tx_packets++;
+ }
+
+ /* XXX MSch: free skb?? */
+ dirty_tx++;
+ }
+
+#ifndef final_version
+ if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
+ DPRINTK( 0, ( "out-of-sync dirty pointer,"
+ " %d vs. %d, full=%ld.\n",
+ dirty_tx, lp->cur_tx, lp->tx_full ));
+ dirty_tx += TX_RING_SIZE;
+ }
+#endif
+
+ if (lp->tx_full && (netif_queue_stopped(dev)) &&
+ dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
+ /* The ring is no longer full, clear tbusy. */
+ lp->tx_full = 0;
+ netif_wake_queue (dev);
+ }
+
+ lp->dirty_tx = dirty_tx;
+ }
+
+ /* Log misc errors. */
+ if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
+ if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
+ if (csr0 & CSR0_MERR) {
+ DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
+ "status %04x.\n", dev->name, csr0 ));
+ /* Restart the chip. */
+ DREG = CSR0_STRT;
+ }
+ }
+
+ /* Clear any other interrupt, and set interrupt enable. */
+ DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
+ CSR0_IDON | CSR0_INEA;
+
+ DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
+ dev->name, DREG ));
+
+ spin_unlock (&lp->devlock);
+ return IRQ_RETVAL(handled);
+}
+
+
+static int lance_rx( struct net_device *dev )
+{
+ struct lance_private *lp = netdev_priv(dev);
+ int entry = lp->cur_rx & RX_RING_MOD_MASK;
+ int i;
+
+ DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
+ MEM->rx_head[entry].flag ));
+
+ /* If we own the next entry, it's a new packet. Send it up. */
+ while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
+ struct lance_rx_head *head = &(MEM->rx_head[entry]);
+ int status = head->flag;
+
+ if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
+ /* There is a tricky error noted by John Murphy,
+ <murf@perftech.com> to Russ Nelson: Even with full-sized
+ buffers it's possible for a jabber packet to use two
+ buffers, with only the last correctly noting the error. */
+ if (status & RMD1_ENP) /* Only count a general error at the */
+ dev->stats.rx_errors++; /* end of a packet.*/
+ if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
+ if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
+ if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
+ if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
+ head->flag &= (RMD1_ENP|RMD1_STP);
+ } else {
+ /* Malloc up new buffer, compatible with net-3. */
+ short pkt_len = head->msg_length & 0xfff;
+ struct sk_buff *skb;
+
+ if (pkt_len < 60) {
+ printk( "%s: Runt packet!\n", dev->name );
+ dev->stats.rx_errors++;
+ }
+ else {
+ skb = netdev_alloc_skb(dev, pkt_len + 2);
+ if (skb == NULL) {
+ for( i = 0; i < RX_RING_SIZE; i++ )
+ if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
+ RMD1_OWN_CHIP)
+ break;
+
+ if (i > RX_RING_SIZE - 2) {
+ dev->stats.rx_dropped++;
+ head->flag |= RMD1_OWN_CHIP;
+ lp->cur_rx++;
+ }
+ break;
+ }
+
+ if (lance_debug >= 3) {
+ u_char *data = PKTBUF_ADDR(head);
+
+ printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %pM to %pM "
+ "data %02x %02x %02x %02x %02x %02x %02x %02x "
+ "len %d\n",
+ dev->name, ((u_short *)data)[6],
+ &data[6], data,
+ data[15], data[16], data[17], data[18],
+ data[19], data[20], data[21], data[22],
+ pkt_len);
+ }
+
+ skb_reserve( skb, 2 ); /* 16 byte align */
+ skb_put( skb, pkt_len ); /* Make room */
+ lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
+ skb->protocol = eth_type_trans( skb, dev );
+ netif_rx( skb );
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += pkt_len;
+ }
+ }
+
+ head->flag |= RMD1_OWN_CHIP;
+ entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
+ }
+ lp->cur_rx &= RX_RING_MOD_MASK;
+
+ /* From lance.c (Donald Becker): */
+ /* We should check that at least two ring entries are free. If not,
+ we should free one and mark stats->rx_dropped++. */
+
+ return 0;
+}
+
+
+static int lance_close( struct net_device *dev )
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_ioreg *IO = lp->iobase;
+
+ netif_stop_queue (dev);
+
+ AREG = CSR0;
+
+ DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
+ dev->name, DREG ));
+
+ /* We stop the LANCE here -- it occasionally polls
+ memory if we don't. */
+ DREG = CSR0_STOP;
+
+ return 0;
+}
+
+
+/* Set or clear the multicast filter for this adaptor.
+ num_addrs == -1 Promiscuous mode, receive all packets
+ num_addrs == 0 Normal mode, clear multicast list
+ num_addrs > 0 Multicast mode, receive normal and MC packets, and do
+ best-effort filtering.
+ */
+
+static void set_multicast_list( struct net_device *dev )
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_ioreg *IO = lp->iobase;
+
+ if (netif_running(dev))
+ /* Only possible if board is already started */
+ return;
+
+ /* We take the simple way out and always enable promiscuous mode. */
+ DREG = CSR0_STOP; /* Temporarily stop the lance. */
+
+ if (dev->flags & IFF_PROMISC) {
+ /* Log any net taps. */
+ DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name ));
+ REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
+ } else {
+ short multicast_table[4];
+ int num_addrs = netdev_mc_count(dev);
+ int i;
+ /* We don't use the multicast table, but rely on upper-layer
+ * filtering. */
+ memset( multicast_table, (num_addrs == 0) ? 0 : -1,
+ sizeof(multicast_table) );
+ for( i = 0; i < 4; i++ )
+ REGA( CSR8+i ) = multicast_table[i];
+ REGA( CSR15 ) = 0; /* Unset promiscuous mode */
+ }
+
+ /*
+ * Always set BSWP after a STOP as STOP puts it back into
+ * little endian mode.
+ */
+ REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
+
+ /* Resume normal operation and reset AREG to CSR0 */
+ REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
+}
+
+
+/* This is needed for old RieblCards and possible for new RieblCards */
+
+static int lance_set_mac_address( struct net_device *dev, void *addr )
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct sockaddr *saddr = addr;
+ int i;
+
+ if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
+ return -EOPNOTSUPP;
+
+ if (netif_running(dev)) {
+ /* Only possible while card isn't started */
+ DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
+ dev->name ));
+ return -EIO;
+ }
+
+ memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );
+ for( i = 0; i < 6; i++ )
+ MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
+ lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
+ /* set also the magic for future sessions */
+ *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
+
+ return 0;
+}
+
+
+#ifdef MODULE
+static struct net_device *atarilance_dev;
+
+static int __init atarilance_module_init(void)
+{
+ atarilance_dev = atarilance_probe(-1);
+ return PTR_ERR_OR_ZERO(atarilance_dev);
+}
+
+static void __exit atarilance_module_exit(void)
+{
+ unregister_netdev(atarilance_dev);
+ free_irq(atarilance_dev->irq, atarilance_dev);
+ free_netdev(atarilance_dev);
+}
+module_init(atarilance_module_init);
+module_exit(atarilance_module_exit);
+#endif /* MODULE */
+
+
+/*
+ * Local variables:
+ * c-indent-level: 4
+ * tab-width: 4
+ * End:
+ */
Code Review / kvmfornfv.git / blobdiff