Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/ibmlana.c b/drivers/net/ibmlana.c
new file mode 100644
index 0000000..01ad904
--- /dev/null
+++ b/drivers/net/ibmlana.c
@@ -0,0 +1,1080 @@
+/*
+net-3-driver for the IBM LAN Adapter/A
+
+This is an extension to the Linux operating system, and is covered by the
+same GNU General Public License that covers that work.
+
+Copyright 1999 by Alfred Arnold (alfred@ccac.rwth-aachen.de,
+ alfred.arnold@lancom.de)
+
+This driver is based both on the SK_MCA driver, which is itself based on the
+SK_G16 and 3C523 driver.
+
+paper sources:
+ 'PC Hardware: Aufbau, Funktionsweise, Programmierung' by
+ Hans-Peter Messmer for the basic Microchannel stuff
+
+ 'Linux Geraetetreiber' by Allesandro Rubini, Kalle Dalheimer
+ for help on Ethernet driver programming
+
+ 'DP83934CVUL-20/25 MHz SONIC-T Ethernet Controller Datasheet' by National
+ Semiconductor for info on the MAC chip
+
+ 'LAN Technical Reference Ethernet Adapter Interface Version 1 Release 1.0
+ Document Number SC30-3661-00' by IBM for info on the adapter itself
+
+ Also see http://www.natsemi.com/
+
+special acknowledgements to:
+ - Bob Eager for helping me out with documentation from IBM
+ - Jim Shorney for his endless patience with me while I was using
+ him as a beta tester to trace down the address filter bug ;-)
+
+ Missing things:
+
+ -> set debug level via ioctl instead of compile-time switches
+ -> I didn't follow the development of the 2.1.x kernels, so my
+ assumptions about which things changed with which kernel version
+ are probably nonsense
+
+History:
+ Nov 6th, 1999
+ startup from SK_MCA driver
+ Dec 6th, 1999
+ finally got docs about the card. A big thank you to Bob Eager!
+ Dec 12th, 1999
+ first packet received
+ Dec 13th, 1999
+ recv queue done, tcpdump works
+ Dec 15th, 1999
+ transmission part works
+ Dec 28th, 1999
+ added usage of the isa_functions for Linux 2.3 . Things should
+ still work with 2.0.x....
+ Jan 28th, 2000
+ in Linux 2.2.13, the version.h file mysteriously didn't get
+ included. Added a workaround for this. Futhermore, it now
+ not only compiles as a modules ;-)
+ Jan 30th, 2000
+ newer kernels automatically probe more than one board, so the
+ 'startslot' as a variable is also needed here
+ Apr 12th, 2000
+ the interrupt mask register is not set 'hard' instead of individually
+ setting registers, since this seems to set bits that shouldn't be
+ set
+ May 21st, 2000
+ reset interrupt status immediately after CAM load
+ add a recovery delay after releasing the chip's reset line
+ May 24th, 2000
+ finally found the bug in the address filter setup - damned signed
+ chars!
+ June 1st, 2000
+ corrected version codes, added support for the latest 2.3 changes
+ Oct 28th, 2002
+ cleaned up for the 2.5 tree <alan@redhat.com>
+
+ *************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/time.h>
+#include <linux/mca-legacy.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+
+#define _IBM_LANA_DRIVER_
+#include "ibmlana.h"
+
+#undef DEBUG
+
+#define DRV_NAME "ibmlana"
+
+/* ------------------------------------------------------------------------
+ * global static data - not more since we can handle multiple boards and
+ * have to pack all state info into the device struct!
+ * ------------------------------------------------------------------------ */
+
+static char *MediaNames[Media_Count] = {
+ "10BaseT", "10Base5", "Unknown", "10Base2"
+};
+
+/* ------------------------------------------------------------------------
+ * private subfunctions
+ * ------------------------------------------------------------------------ */
+
+#ifdef DEBUG
+ /* dump all registers */
+
+static void dumpregs(struct net_device *dev)
+{
+ int z;
+
+ for (z = 0; z < 160; z += 2) {
+ if (!(z & 15))
+ printk("REGS: %04x:", z);
+ printk(" %04x", inw(dev->base_addr + z));
+ if ((z & 15) == 14)
+ printk("\n");
+ }
+}
+
+/* dump parts of shared memory - only needed during debugging */
+
+static void dumpmem(struct net_device *dev, u32 start, u32 len)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ int z;
+
+ printk("Address %04x:\n", start);
+ for (z = 0; z < len; z++) {
+ if ((z & 15) == 0)
+ printk("%04x:", z);
+ printk(" %02x", readb(priv->base + start + z));
+ if ((z & 15) == 15)
+ printk("\n");
+ }
+ if ((z & 15) != 0)
+ printk("\n");
+}
+
+/* print exact time - ditto */
+
+static void PrTime(void)
+{
+ struct timeval tv;
+
+ do_gettimeofday(&tv);
+ printk("%9d:%06d: ", (int) tv.tv_sec, (int) tv.tv_usec);
+}
+#endif /* DEBUG */
+
+/* deduce resources out of POS registers */
+
+static void getaddrs(int slot, int *base, int *memlen, int *iobase,
+ int *irq, ibmlana_medium * medium)
+{
+ u_char pos0, pos1;
+
+ pos0 = mca_read_stored_pos(slot, 2);
+ pos1 = mca_read_stored_pos(slot, 3);
+
+ *base = 0xc0000 + ((pos1 & 0xf0) << 9);
+ *memlen = (pos1 & 0x01) ? 0x8000 : 0x4000;
+ *iobase = (pos0 & 0xe0) << 7;
+ switch (pos0 & 0x06) {
+ case 0:
+ *irq = 5;
+ break;
+ case 2:
+ *irq = 15;
+ break;
+ case 4:
+ *irq = 10;
+ break;
+ case 6:
+ *irq = 11;
+ break;
+ }
+ *medium = (pos0 & 0x18) >> 3;
+}
+
+/* wait on register value with mask and timeout */
+
+static int wait_timeout(struct net_device *dev, int regoffs, u16 mask,
+ u16 value, int timeout)
+{
+ unsigned long fin = jiffies + timeout;
+
+ while (time_before(jiffies,fin))
+ if ((inw(dev->base_addr + regoffs) & mask) == value)
+ return 1;
+
+ return 0;
+}
+
+
+/* reset the whole board */
+
+static void ResetBoard(struct net_device *dev)
+{
+ unsigned char bcmval;
+
+ /* read original board control value */
+
+ bcmval = inb(dev->base_addr + BCMREG);
+
+ /* set reset bit for a while */
+
+ bcmval |= BCMREG_RESET;
+ outb(bcmval, dev->base_addr + BCMREG);
+ udelay(10);
+ bcmval &= ~BCMREG_RESET;
+ outb(bcmval, dev->base_addr + BCMREG);
+
+ /* switch over to RAM again */
+
+ bcmval |= BCMREG_RAMEN | BCMREG_RAMWIN;
+ outb(bcmval, dev->base_addr + BCMREG);
+}
+
+/* calculate RAM layout & set up descriptors in RAM */
+
+static void InitDscrs(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ u32 addr, baddr, raddr;
+ int z;
+ tda_t tda;
+ rda_t rda;
+ rra_t rra;
+
+ /* initialize RAM */
+
+ memset_io(priv->base, 0xaa,
+ dev->mem_start - dev->mem_start); /* XXX: typo? */
+
+ /* setup n TX descriptors - independent of RAM size */
+
+ priv->tdastart = addr = 0;
+ priv->txbufstart = baddr = sizeof(tda_t) * TXBUFCNT;
+ for (z = 0; z < TXBUFCNT; z++) {
+ tda.status = 0;
+ tda.config = 0;
+ tda.length = 0;
+ tda.fragcount = 1;
+ tda.startlo = baddr;
+ tda.starthi = 0;
+ tda.fraglength = 0;
+ if (z == TXBUFCNT - 1)
+ tda.link = priv->tdastart;
+ else
+ tda.link = addr + sizeof(tda_t);
+ tda.link |= 1;
+ memcpy_toio(priv->base + addr, &tda, sizeof(tda_t));
+ addr += sizeof(tda_t);
+ baddr += PKTSIZE;
+ }
+
+ /* calculate how many receive buffers fit into remaining memory */
+
+ priv->rxbufcnt = (dev->mem_end - dev->mem_start - baddr) / (sizeof(rra_t) + sizeof(rda_t) + PKTSIZE);
+
+ /* calculate receive addresses */
+
+ priv->rrastart = raddr = priv->txbufstart + (TXBUFCNT * PKTSIZE);
+ priv->rdastart = addr = priv->rrastart + (priv->rxbufcnt * sizeof(rra_t));
+ priv->rxbufstart = baddr = priv->rdastart + (priv->rxbufcnt * sizeof(rda_t));
+
+ for (z = 0; z < priv->rxbufcnt; z++) {
+ rra.startlo = baddr;
+ rra.starthi = 0;
+ rra.cntlo = PKTSIZE >> 1;
+ rra.cnthi = 0;
+ memcpy_toio(priv->base + raddr, &rra, sizeof(rra_t));
+
+ rda.status = 0;
+ rda.length = 0;
+ rda.startlo = 0;
+ rda.starthi = 0;
+ rda.seqno = 0;
+ if (z < priv->rxbufcnt - 1)
+ rda.link = addr + sizeof(rda_t);
+ else
+ rda.link = 1;
+ rda.inuse = 1;
+ memcpy_toio(priv->base + addr, &rda, sizeof(rda_t));
+
+ baddr += PKTSIZE;
+ raddr += sizeof(rra_t);
+ addr += sizeof(rda_t);
+ }
+
+ /* initialize current pointers */
+
+ priv->nextrxdescr = 0;
+ priv->lastrxdescr = priv->rxbufcnt - 1;
+ priv->nexttxdescr = 0;
+ priv->currtxdescr = 0;
+ priv->txusedcnt = 0;
+ memset(priv->txused, 0, sizeof(priv->txused));
+}
+
+/* set up Rx + Tx descriptors in SONIC */
+
+static int InitSONIC(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+
+ /* set up start & end of resource area */
+
+ outw(0, SONIC_URRA);
+ outw(priv->rrastart, dev->base_addr + SONIC_RSA);
+ outw(priv->rrastart + (priv->rxbufcnt * sizeof(rra_t)), dev->base_addr + SONIC_REA);
+ outw(priv->rrastart, dev->base_addr + SONIC_RRP);
+ outw(priv->rrastart, dev->base_addr + SONIC_RWP);
+
+ /* set EOBC so that only one packet goes into one buffer */
+
+ outw((PKTSIZE - 4) >> 1, dev->base_addr + SONIC_EOBC);
+
+ /* let SONIC read the first RRA descriptor */
+
+ outw(CMDREG_RRRA, dev->base_addr + SONIC_CMDREG);
+ if (!wait_timeout(dev, SONIC_CMDREG, CMDREG_RRRA, 0, 2)) {
+ printk(KERN_ERR "%s: SONIC did not respond on RRRA command - giving up.", dev->name);
+ return 0;
+ }
+
+ /* point SONIC to the first RDA */
+
+ outw(0, dev->base_addr + SONIC_URDA);
+ outw(priv->rdastart, dev->base_addr + SONIC_CRDA);
+
+ /* set upper half of TDA address */
+
+ outw(0, dev->base_addr + SONIC_UTDA);
+
+ return 1;
+}
+
+/* stop SONIC so we can reinitialize it */
+
+static void StopSONIC(struct net_device *dev)
+{
+ /* disable interrupts */
+
+ outb(inb(dev->base_addr + BCMREG) & (~BCMREG_IEN), dev->base_addr + BCMREG);
+ outb(0, dev->base_addr + SONIC_IMREG);
+
+ /* reset the SONIC */
+
+ outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
+ udelay(10);
+ outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
+}
+
+/* initialize card and SONIC for proper operation */
+
+static void putcam(camentry_t * cams, int *camcnt, char *addr)
+{
+ camentry_t *pcam = cams + (*camcnt);
+ u8 *uaddr = (u8 *) addr;
+
+ pcam->index = *camcnt;
+ pcam->addr0 = (((u16) uaddr[1]) << 8) | uaddr[0];
+ pcam->addr1 = (((u16) uaddr[3]) << 8) | uaddr[2];
+ pcam->addr2 = (((u16) uaddr[5]) << 8) | uaddr[4];
+ (*camcnt)++;
+}
+
+static void InitBoard(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ int camcnt;
+ camentry_t cams[16];
+ u32 cammask;
+ struct dev_mc_list *mcptr;
+ u16 rcrval;
+
+ /* reset the SONIC */
+
+ outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
+ udelay(10);
+
+ /* clear all spurious interrupts */
+
+ outw(inw(dev->base_addr + SONIC_ISREG), dev->base_addr + SONIC_ISREG);
+
+ /* set up the SONIC's bus interface - constant for this adapter -
+ must be done while the SONIC is in reset */
+
+ outw(DCREG_USR1 | DCREG_USR0 | DCREG_WC1 | DCREG_DW32, dev->base_addr + SONIC_DCREG);
+ outw(0, dev->base_addr + SONIC_DCREG2);
+
+ /* remove reset form the SONIC */
+
+ outw(0, dev->base_addr + SONIC_CMDREG);
+ udelay(10);
+
+ /* data sheet requires URRA to be programmed before setting up the CAM contents */
+
+ outw(0, dev->base_addr + SONIC_URRA);
+
+ /* program the CAM entry 0 to the device address */
+
+ camcnt = 0;
+ putcam(cams, &camcnt, dev->dev_addr);
+
+ /* start putting the multicast addresses into the CAM list. Stop if
+ it is full. */
+
+ for (mcptr = dev->mc_list; mcptr != NULL; mcptr = mcptr->next) {
+ putcam(cams, &camcnt, mcptr->dmi_addr);
+ if (camcnt == 16)
+ break;
+ }
+
+ /* calculate CAM mask */
+
+ cammask = (1 << camcnt) - 1;
+
+ /* feed CDA into SONIC, initialize RCR value (always get broadcasts) */
+
+ memcpy_toio(priv->base, cams, sizeof(camentry_t) * camcnt);
+ memcpy_toio(priv->base + (sizeof(camentry_t) * camcnt), &cammask, sizeof(cammask));
+
+#ifdef DEBUG
+ printk("CAM setup:\n");
+ dumpmem(dev, 0, sizeof(camentry_t) * camcnt + sizeof(cammask));
+#endif
+
+ outw(0, dev->base_addr + SONIC_CAMPTR);
+ outw(camcnt, dev->base_addr + SONIC_CAMCNT);
+ outw(CMDREG_LCAM, dev->base_addr + SONIC_CMDREG);
+ if (!wait_timeout(dev, SONIC_CMDREG, CMDREG_LCAM, 0, 2)) {
+ printk(KERN_ERR "%s:SONIC did not respond on LCAM command - giving up.", dev->name);
+ return;
+ } else {
+ /* clear interrupt condition */
+
+ outw(ISREG_LCD, dev->base_addr + SONIC_ISREG);
+
+#ifdef DEBUG
+ printk("Loading CAM done, address pointers %04x:%04x\n",
+ inw(dev->base_addr + SONIC_URRA),
+ inw(dev->base_addr + SONIC_CAMPTR));
+ {
+ int z;
+
+ printk("\n-->CAM: PTR %04x CNT %04x\n",
+ inw(dev->base_addr + SONIC_CAMPTR),
+ inw(dev->base_addr + SONIC_CAMCNT));
+ outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
+ for (z = 0; z < camcnt; z++) {
+ outw(z, dev->base_addr + SONIC_CAMEPTR);
+ printk("Entry %d: %04x %04x %04x\n", z,
+ inw(dev->base_addr + SONIC_CAMADDR0),
+ inw(dev->base_addr + SONIC_CAMADDR1),
+ inw(dev->base_addr + SONIC_CAMADDR2));
+ }
+ outw(0, dev->base_addr + SONIC_CMDREG);
+ }
+#endif
+ }
+
+ rcrval = RCREG_BRD | RCREG_LB_NONE;
+
+ /* if still multicast addresses left or ALLMULTI is set, set the multicast
+ enable bit */
+
+ if ((dev->flags & IFF_ALLMULTI) || (mcptr != NULL))
+ rcrval |= RCREG_AMC;
+
+ /* promiscous mode ? */
+
+ if (dev->flags & IFF_PROMISC)
+ rcrval |= RCREG_PRO;
+
+ /* program receive mode */
+
+ outw(rcrval, dev->base_addr + SONIC_RCREG);
+#ifdef DEBUG
+ printk("\nRCRVAL: %04x\n", rcrval);
+#endif
+
+ /* set up descriptors in shared memory + feed them into SONIC registers */
+
+ InitDscrs(dev);
+ if (!InitSONIC(dev))
+ return;
+
+ /* reset all pending interrupts */
+
+ outw(0xffff, dev->base_addr + SONIC_ISREG);
+
+ /* enable transmitter + receiver interrupts */
+
+ outw(CMDREG_RXEN, dev->base_addr + SONIC_CMDREG);
+ outw(IMREG_PRXEN | IMREG_RBEEN | IMREG_PTXEN | IMREG_TXEREN, dev->base_addr + SONIC_IMREG);
+
+ /* turn on card interrupts */
+
+ outb(inb(dev->base_addr + BCMREG) | BCMREG_IEN, dev->base_addr + BCMREG);
+
+#ifdef DEBUG
+ printk("Register dump after initialization:\n");
+ dumpregs(dev);
+#endif
+}
+
+/* start transmission of a descriptor */
+
+static void StartTx(struct net_device *dev, int descr)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ int addr;
+
+ addr = priv->tdastart + (descr * sizeof(tda_t));
+
+ /* put descriptor address into SONIC */
+
+ outw(addr, dev->base_addr + SONIC_CTDA);
+
+ /* trigger transmitter */
+
+ priv->currtxdescr = descr;
+ outw(CMDREG_TXP, dev->base_addr + SONIC_CMDREG);
+}
+
+/* ------------------------------------------------------------------------
+ * interrupt handler(s)
+ * ------------------------------------------------------------------------ */
+
+/* receive buffer area exhausted */
+
+static void irqrbe_handler(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+
+ /* point the SONIC back to the RRA start */
+
+ outw(priv->rrastart, dev->base_addr + SONIC_RRP);
+ outw(priv->rrastart, dev->base_addr + SONIC_RWP);
+}
+
+/* receive interrupt */
+
+static void irqrx_handler(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ rda_t rda;
+ u32 rdaaddr, lrdaaddr;
+
+ /* loop until ... */
+
+ while (1) {
+ /* read descriptor that was next to be filled by SONIC */
+
+ rdaaddr = priv->rdastart + (priv->nextrxdescr * sizeof(rda_t));
+ lrdaaddr = priv->rdastart + (priv->lastrxdescr * sizeof(rda_t));
+ memcpy_fromio(&rda, priv->base + rdaaddr, sizeof(rda_t));
+
+ /* iron out upper word halves of fields we use - SONIC will duplicate
+ bits 0..15 to 16..31 */
+
+ rda.status &= 0xffff;
+ rda.length &= 0xffff;
+ rda.startlo &= 0xffff;
+
+ /* stop if the SONIC still owns it, i.e. there is no data for us */
+
+ if (rda.inuse)
+ break;
+
+ /* good packet? */
+
+ else if (rda.status & RCREG_PRX) {
+ struct sk_buff *skb;
+
+ /* fetch buffer */
+
+ skb = dev_alloc_skb(rda.length + 2);
+ if (skb == NULL)
+ priv->stat.rx_dropped++;
+ else {
+ /* copy out data */
+
+ memcpy_fromio(skb_put(skb, rda.length),
+ priv->base +
+ rda.startlo, rda.length);
+
+ /* set up skb fields */
+
+ skb->dev = dev;
+ skb->protocol = eth_type_trans(skb, dev);
+ skb->ip_summed = CHECKSUM_NONE;
+
+ /* bookkeeping */
+ dev->last_rx = jiffies;
+ priv->stat.rx_packets++;
+ priv->stat.rx_bytes += rda.length;
+
+ /* pass to the upper layers */
+ netif_rx(skb);
+ }
+ }
+
+ /* otherwise check error status bits and increase statistics */
+
+ else {
+ priv->stat.rx_errors++;
+ if (rda.status & RCREG_FAER)
+ priv->stat.rx_frame_errors++;
+ if (rda.status & RCREG_CRCR)
+ priv->stat.rx_crc_errors++;
+ }
+
+ /* descriptor processed, will become new last descriptor in queue */
+
+ rda.link = 1;
+ rda.inuse = 1;
+ memcpy_toio(priv->base + rdaaddr, &rda,
+ sizeof(rda_t));
+
+ /* set up link and EOL = 0 in currently last descriptor. Only write
+ the link field since the SONIC may currently already access the
+ other fields. */
+
+ memcpy_toio(priv->base + lrdaaddr + 20, &rdaaddr, 4);
+
+ /* advance indices */
+
+ priv->lastrxdescr = priv->nextrxdescr;
+ if ((++priv->nextrxdescr) >= priv->rxbufcnt)
+ priv->nextrxdescr = 0;
+ }
+}
+
+/* transmit interrupt */
+
+static void irqtx_handler(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ tda_t tda;
+
+ /* fetch descriptor (we forgot the size ;-) */
+ memcpy_fromio(&tda, priv->base + priv->tdastart + (priv->currtxdescr * sizeof(tda_t)), sizeof(tda_t));
+
+ /* update statistics */
+ priv->stat.tx_packets++;
+ priv->stat.tx_bytes += tda.length;
+
+ /* update our pointers */
+ priv->txused[priv->currtxdescr] = 0;
+ priv->txusedcnt--;
+
+ /* if there are more descriptors present in RAM, start them */
+ if (priv->txusedcnt > 0)
+ StartTx(dev, (priv->currtxdescr + 1) % TXBUFCNT);
+
+ /* tell the upper layer we can go on transmitting */
+ netif_wake_queue(dev);
+}
+
+static void irqtxerr_handler(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ tda_t tda;
+
+ /* fetch descriptor to check status */
+ memcpy_fromio(&tda, priv->base + priv->tdastart + (priv->currtxdescr * sizeof(tda_t)), sizeof(tda_t));
+
+ /* update statistics */
+ priv->stat.tx_errors++;
+ if (tda.status & (TCREG_NCRS | TCREG_CRSL))
+ priv->stat.tx_carrier_errors++;
+ if (tda.status & TCREG_EXC)
+ priv->stat.tx_aborted_errors++;
+ if (tda.status & TCREG_OWC)
+ priv->stat.tx_window_errors++;
+ if (tda.status & TCREG_FU)
+ priv->stat.tx_fifo_errors++;
+
+ /* update our pointers */
+ priv->txused[priv->currtxdescr] = 0;
+ priv->txusedcnt--;
+
+ /* if there are more descriptors present in RAM, start them */
+ if (priv->txusedcnt > 0)
+ StartTx(dev, (priv->currtxdescr + 1) % TXBUFCNT);
+
+ /* tell the upper layer we can go on transmitting */
+ netif_wake_queue(dev);
+}
+
+/* general interrupt entry */
+
+static irqreturn_t irq_handler(int irq, void *device, struct pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) device;
+ u16 ival;
+
+ /* in case we're not meant... */
+ if (!(inb(dev->base_addr + BCMREG) & BCMREG_IPEND))
+ return IRQ_NONE;
+
+ /* loop through the interrupt bits until everything is clear */
+ while (1) {
+ ival = inw(dev->base_addr + SONIC_ISREG);
+
+ if (ival & ISREG_RBE) {
+ irqrbe_handler(dev);
+ outw(ISREG_RBE, dev->base_addr + SONIC_ISREG);
+ }
+ if (ival & ISREG_PKTRX) {
+ irqrx_handler(dev);
+ outw(ISREG_PKTRX, dev->base_addr + SONIC_ISREG);
+ }
+ if (ival & ISREG_TXDN) {
+ irqtx_handler(dev);
+ outw(ISREG_TXDN, dev->base_addr + SONIC_ISREG);
+ }
+ if (ival & ISREG_TXER) {
+ irqtxerr_handler(dev);
+ outw(ISREG_TXER, dev->base_addr + SONIC_ISREG);
+ }
+ break;
+ }
+ return IRQ_HANDLED;
+}
+
+/* ------------------------------------------------------------------------
+ * driver methods
+ * ------------------------------------------------------------------------ */
+
+/* MCA info */
+
+static int ibmlana_getinfo(char *buf, int slot, void *d)
+{
+ int len = 0, i;
+ struct net_device *dev = (struct net_device *) d;
+ ibmlana_priv *priv;
+
+ /* can't say anything about an uninitialized device... */
+
+ if (dev == NULL)
+ return len;
+ priv = netdev_priv(dev);
+
+ /* print info */
+
+ len += sprintf(buf + len, "IRQ: %d\n", priv->realirq);
+ len += sprintf(buf + len, "I/O: %#lx\n", dev->base_addr);
+ len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start, dev->mem_end - 1);
+ len += sprintf(buf + len, "Transceiver: %s\n", MediaNames[priv->medium]);
+ len += sprintf(buf + len, "Device: %s\n", dev->name);
+ len += sprintf(buf + len, "MAC address:");
+ for (i = 0; i < 6; i++)
+ len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
+ buf[len++] = '\n';
+ buf[len] = 0;
+
+ return len;
+}
+
+/* open driver. Means also initialization and start of LANCE */
+
+static int ibmlana_open(struct net_device *dev)
+{
+ int result;
+ ibmlana_priv *priv = netdev_priv(dev);
+
+ /* register resources - only necessary for IRQ */
+
+ result = request_irq(priv->realirq, irq_handler, SA_SHIRQ | SA_SAMPLE_RANDOM, dev->name, dev);
+ if (result != 0) {
+ printk(KERN_ERR "%s: failed to register irq %d\n", dev->name, dev->irq);
+ return result;
+ }
+ dev->irq = priv->realirq;
+
+ /* set up the card and SONIC */
+ InitBoard(dev);
+
+ /* initialize operational flags */
+ netif_start_queue(dev);
+ return 0;
+}
+
+/* close driver. Shut down board and free allocated resources */
+
+static int ibmlana_close(struct net_device *dev)
+{
+ /* turn off board */
+
+ /* release resources */
+ if (dev->irq != 0)
+ free_irq(dev->irq, dev);
+ dev->irq = 0;
+ return 0;
+}
+
+/* transmit a block. */
+
+static int ibmlana_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ int retval = 0, tmplen, addr;
+ unsigned long flags;
+ tda_t tda;
+ int baddr;
+
+ /* find out if there are free slots for a frame to transmit. If not,
+ the upper layer is in deep desperation and we simply ignore the frame. */
+
+ if (priv->txusedcnt >= TXBUFCNT) {
+ retval = -EIO;
+ priv->stat.tx_dropped++;
+ goto tx_done;
+ }
+
+ /* copy the frame data into the next free transmit buffer - fillup missing */
+ tmplen = skb->len;
+ if (tmplen < 60)
+ tmplen = 60;
+ baddr = priv->txbufstart + (priv->nexttxdescr * PKTSIZE);
+ memcpy_toio(priv->base + baddr, skb->data, skb->len);
+
+ /* copy filler into RAM - in case we're filling up...
+ we're filling a bit more than necessary, but that doesn't harm
+ since the buffer is far larger...
+ Sorry Linus for the filler string but I couldn't resist ;-) */
+
+ if (tmplen > skb->len) {
+ char *fill = "NetBSD is a nice OS too! ";
+ unsigned int destoffs = skb->len, l = strlen(fill);
+
+ while (destoffs < tmplen) {
+ memcpy_toio(priv->base + baddr + destoffs, fill, l);
+ destoffs += l;
+ }
+ }
+
+ /* set up the new frame descriptor */
+ addr = priv->tdastart + (priv->nexttxdescr * sizeof(tda_t));
+ memcpy_fromio(&tda, priv->base + addr, sizeof(tda_t));
+ tda.length = tda.fraglength = tmplen;
+ memcpy_toio(priv->base + addr, &tda, sizeof(tda_t));
+
+ /* if there were no active descriptors, trigger the SONIC */
+ spin_lock_irqsave(&priv->lock, flags);
+
+ priv->txusedcnt++;
+ priv->txused[priv->nexttxdescr] = 1;
+
+ /* are all transmission slots used up ? */
+ if (priv->txusedcnt >= TXBUFCNT)
+ netif_stop_queue(dev);
+
+ if (priv->txusedcnt == 1)
+ StartTx(dev, priv->nexttxdescr);
+ priv->nexttxdescr = (priv->nexttxdescr + 1) % TXBUFCNT;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+tx_done:
+ dev_kfree_skb(skb);
+ return retval;
+}
+
+/* return pointer to Ethernet statistics */
+
+static struct net_device_stats *ibmlana_stats(struct net_device *dev)
+{
+ ibmlana_priv *priv = netdev_priv(dev);
+ return &priv->stat;
+}
+
+/* switch receiver mode. */
+
+static void ibmlana_set_multicast_list(struct net_device *dev)
+{
+ /* first stop the SONIC... */
+ StopSONIC(dev);
+ /* ...then reinit it with the new flags */
+ InitBoard(dev);
+}
+
+/* ------------------------------------------------------------------------
+ * hardware check
+ * ------------------------------------------------------------------------ */
+
+static int startslot; /* counts through slots when probing multiple devices */
+
+static int ibmlana_probe(struct net_device *dev)
+{
+ int slot, z;
+ int base = 0, irq = 0, iobase = 0, memlen = 0;
+ ibmlana_priv *priv;
+ ibmlana_medium medium;
+
+ SET_MODULE_OWNER(dev);
+
+ /* can't work without an MCA bus ;-) */
+ if (MCA_bus == 0)
+ return -ENODEV;
+
+ base = dev->mem_start;
+ irq = dev->irq;
+
+ for (slot = startslot; (slot = mca_find_adapter(IBM_LANA_ID, slot)) != -1; slot++) {
+ /* deduce card addresses */
+ getaddrs(slot, &base, &memlen, &iobase, &irq, &medium);
+
+ /* slot already in use ? */
+ if (mca_is_adapter_used(slot))
+ continue;
+ /* were we looking for something different ? */
+ if (dev->irq && dev->irq != irq)
+ continue;
+ if (dev->mem_start && dev->mem_start != base)
+ continue;
+ /* found something that matches */
+ break;
+ }
+
+ /* nothing found ? */
+ if (slot == -1)
+ return (base != 0 || irq != 0) ? -ENXIO : -ENODEV;
+
+ /* announce success */
+ printk(KERN_INFO "%s: IBM LAN Adapter/A found in slot %d\n", dev->name, slot + 1);
+
+ /* try to obtain I/O range */
+ if (!request_region(iobase, IBM_LANA_IORANGE, DRV_NAME)) {
+ printk(KERN_ERR "%s: cannot allocate I/O range at %#x!\n", DRV_NAME, iobase);
+ startslot = slot + 1;
+ return -EBUSY;
+ }
+
+ priv = netdev_priv(dev);
+ priv->slot = slot;
+ priv->realirq = irq;
+ priv->medium = medium;
+ spin_lock_init(&priv->lock);
+
+
+ /* set base + irq for this device (irq not allocated so far) */
+
+ dev->irq = 0;
+ dev->mem_start = base;
+ dev->mem_end = base + memlen;
+ dev->base_addr = iobase;
+
+ priv->base = ioremap(base, memlen);
+ if (!priv->base) {
+ printk(KERN_ERR "%s: cannot remap memory!\n", DRV_NAME);
+ startslot = slot + 1;
+ release_region(iobase, IBM_LANA_IORANGE);
+ return -EBUSY;
+ }
+
+ /* make procfs entries */
+ mca_set_adapter_name(slot, "IBM LAN Adapter/A");
+ mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmlana_getinfo, dev);
+
+ mca_mark_as_used(slot);
+
+ /* set methods */
+
+ dev->open = ibmlana_open;
+ dev->stop = ibmlana_close;
+ dev->hard_start_xmit = ibmlana_tx;
+ dev->do_ioctl = NULL;
+ dev->get_stats = ibmlana_stats;
+ dev->set_multicast_list = ibmlana_set_multicast_list;
+ dev->flags |= IFF_MULTICAST;
+
+ /* copy out MAC address */
+
+ for (z = 0; z < sizeof(dev->dev_addr); z++)
+ dev->dev_addr[z] = inb(dev->base_addr + MACADDRPROM + z);
+
+ /* print config */
+
+ printk(KERN_INFO "%s: IRQ %d, I/O %#lx, memory %#lx-%#lx, "
+ "MAC address %02x:%02x:%02x:%02x:%02x:%02x.\n",
+ dev->name, priv->realirq, dev->base_addr,
+ dev->mem_start, dev->mem_end - 1,
+ dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+ dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+ printk(KERN_INFO "%s: %s medium\n", dev->name, MediaNames[priv->medium]);
+
+ /* reset board */
+
+ ResetBoard(dev);
+
+ /* next probe will start at next slot */
+
+ startslot = slot + 1;
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------------
+ * modularization support
+ * ------------------------------------------------------------------------ */
+
+#ifdef MODULE
+
+#define DEVMAX 5
+
+static struct net_device *moddevs[DEVMAX];
+static int irq;
+static int io;
+
+module_param(irq, int, 0);
+module_param(io, int, 0);
+MODULE_PARM_DESC(irq, "IBM LAN/A IRQ number");
+MODULE_PARM_DESC(io, "IBM LAN/A I/O base address");
+MODULE_LICENSE("GPL");
+
+int init_module(void)
+{
+ int z;
+
+ startslot = 0;
+ for (z = 0; z < DEVMAX; z++) {
+ struct net_device *dev = alloc_etherdev(sizeof(ibmlana_priv));
+ if (!dev)
+ break;
+ dev->irq = irq;
+ dev->base_addr = io;
+ if (ibmlana_probe(dev)) {
+ free_netdev(dev);
+ break;
+ }
+ if (register_netdev(dev)) {
+ ibmlana_priv *priv = netdev_priv(dev);
+ release_region(dev->base_addr, IBM_LANA_IORANGE);
+ mca_mark_as_unused(priv->slot);
+ mca_set_adapter_name(priv->slot, "");
+ mca_set_adapter_procfn(priv->slot, NULL, NULL);
+ iounmap(priv->base);
+ free_netdev(dev);
+ break;
+ }
+ moddevs[z] = dev;
+ }
+ return (z > 0) ? 0 : -EIO;
+}
+
+void cleanup_module(void)
+{
+ int z;
+ for (z = 0; z < DEVMAX; z++) {
+ struct net_device *dev = moddevs[z];
+ if (dev) {
+ ibmlana_priv *priv = netdev_priv(dev);
+ unregister_netdev(dev);
+ /*DeinitBoard(dev); */
+ release_region(dev->base_addr, IBM_LANA_IORANGE);
+ mca_mark_as_unused(priv->slot);
+ mca_set_adapter_name(priv->slot, "");
+ mca_set_adapter_procfn(priv->slot, NULL, NULL);
+ iounmap(priv->base);
+ free_netdev(dev);
+ }
+ }
+}
+#endif /* MODULE */