ibmlana.c
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上传日期:2013-02-24
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- /*
- 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, aarnold@elsa.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
- *************************************************************************/
- #include <linux/version.h>
- #include <linux/kernel.h>
- #include <linux/sched.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.h>
- #include <asm/processor.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <linux/module.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #define _IBM_LANA_DRIVER_
- #include "ibmlana.h"
- #undef DEBUG
- /* ------------------------------------------------------------------------
- * 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 IBMLANA_NETDEV *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 IBMLANA_NETDEV *dev, u32 start, u32 len)
- {
- int z;
- printk("Address %04x:n", start);
- for (z = 0; z < len; z++) {
- if ((z & 15) == 0)
- printk("%04x:", z);
- printk(" %02x", IBMLANA_READB(dev->mem_start + 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 IBMLANA_NETDEV *dev, int regoffs, u16 mask,
- u16 value, int timeout)
- {
- unsigned long fin = jiffies + timeout;
- while (jiffies != fin)
- if ((inw(dev->base_addr + regoffs) & mask) == value)
- return 1;
- return 0;
- }
- /* reset the whole board */
- static void ResetBoard(struct IBMLANA_NETDEV *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 IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- u32 addr, baddr, raddr;
- int z;
- tda_t tda;
- rda_t rda;
- rra_t rra;
- /* initialize RAM */
- IBMLANA_SETIO(dev->mem_start, 0xaa,
- dev->mem_start - dev->mem_start);
- /* 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;
- IBMLANA_TOIO(dev->mem_start + 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;
- IBMLANA_TOIO(dev->mem_start + 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;
- IBMLANA_TOIO(dev->mem_start + 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 IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- /* 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
- ("%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 IBMLANA_NETDEV *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 IBMLANA_NETDEV *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) */
- IBMLANA_TOIO(dev->mem_start, cams, sizeof(camentry_t) * camcnt);
- IBMLANA_TOIO(dev->mem_start + (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
- ("%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:%04xn",
- inw(dev->base_addr + SONIC_URRA),
- inw(dev->base_addr + SONIC_CAMPTR));
- {
- int z;
- printk("n-->CAM: PTR %04x CNT %04xn",
- 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 %04xn", 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: %04xn", 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 IBMLANA_NETDEV *dev, int descr)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- 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 IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- /* 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 IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- 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));
- IBMLANA_FROMIO(&rda, dev->mem_start + 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 */
- IBMLANA_FROMIO(skb_put(skb, rda.length),
- dev->mem_start +
- 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++;
- #if (LINUX_VERSION_CODE >= 0x20119) /* byte counters for kernel >= 2.1.25 */
- priv->stat.rx_bytes += rda.length;
- #endif
- /* 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;
- IBMLANA_TOIO(dev->mem_start + 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. */
- IBMLANA_TOIO(dev->mem_start + 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 IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- tda_t tda;
- /* fetch descriptor (we forgot the size ;-) */
- IBMLANA_FROMIO(&tda,
- dev->mem_start + priv->tdastart +
- (priv->currtxdescr * sizeof(tda_t)), sizeof(tda_t));
- /* update statistics */
- priv->stat.tx_packets++;
- #if (LINUX_VERSION_CODE >= 0x020119)
- priv->stat.tx_bytes += tda.length;
- #endif
- /* 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 */
- #if LINUX_VERSION_CODE >= 0x02032a
- netif_wake_queue(dev);
- #else
- dev->tbusy = 0;
- mark_bh(NET_BH);
- #endif
- }
- static void irqtxerr_handler(struct IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- tda_t tda;
- /* fetch descriptor to check status */
- IBMLANA_FROMIO(&tda,
- dev->mem_start + 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 */
- #if LINUX_VERSION_CODE >= 0x02032a
- netif_wake_queue(dev);
- #else
- dev->tbusy = 0;
- mark_bh(NET_BH);
- #endif
- }
- /* general interrupt entry */
- static void irq_handler(int irq, void *device, struct pt_regs *regs)
- {
- struct IBMLANA_NETDEV *dev = (struct IBMLANA_NETDEV *) device;
- u16 ival;
- /* in case we're not meant... */
- if (!(inb(dev->base_addr + BCMREG) & BCMREG_IPEND))
- return;
- #if (LINUX_VERSION_CODE >= 0x02032a)
- #if 0
- set_bit(LINK_STATE_RXSEM, &dev->state);
- #endif
- #else
- dev->interrupt = 1;
- #endif
- /* 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;
- }
- #if (LINUX_VERSION_CODE >= 0x02032a)
- #if 0
- clear_bit(LINK_STATE_RXSEM, &dev->state);
- #endif
- #else
- dev->interrupt = 0;
- #endif
- }
- /* ------------------------------------------------------------------------
- * driver methods
- * ------------------------------------------------------------------------ */
- /* MCA info */
- static int ibmlana_getinfo(char *buf, int slot, void *d)
- {
- int len = 0, i;
- struct IBMLANA_NETDEV *dev = (struct IBMLANA_NETDEV *) d;
- ibmlana_priv *priv;
- /* can't say anything about an uninitialized device... */
- if (dev == NULL)
- return len;
- if (dev->priv == NULL)
- return len;
- priv = (ibmlana_priv *) dev->priv;
- /* print info */
- len += sprintf(buf + len, "IRQ: %dn", priv->realirq);
- len += sprintf(buf + len, "I/O: %#lxn", dev->base_addr);
- len += sprintf(buf + len, "Memory: %#lx-%#lxn", dev->mem_start,
- dev->mem_end - 1);
- len +=
- sprintf(buf + len, "Transceiver: %sn",
- MediaNames[priv->medium]);
- len += sprintf(buf + len, "Device: %sn", 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 IBMLANA_NETDEV *dev)
- {
- int result;
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- /* 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("%s: failed to register irq %dn", dev->name,
- dev->irq);
- return result;
- }
- dev->irq = priv->realirq;
- /* set up the card and SONIC */
- InitBoard(dev);
- /* initialize operational flags */
- #if (LINUX_VERSION_CODE >= 0x02032a)
- netif_start_queue(dev);
- #else
- dev->interrupt = 0;
- dev->tbusy = 0;
- dev->start = 1;
- MOD_INC_USE_COUNT;
- #endif
- return 0;
- }
- /* close driver. Shut down board and free allocated resources */
- static int ibmlana_close(struct IBMLANA_NETDEV *dev)
- {
- /* turn off board */
- /* release resources */
- if (dev->irq != 0)
- free_irq(dev->irq, dev);
- dev->irq = 0;
- #if (LINUX_VERSION_CODE < 0x02032a)
- MOD_DEC_USE_COUNT;
- #endif
- return 0;
- }
- /* transmit a block. */
- static int ibmlana_tx(struct sk_buff *skb, struct IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- int retval = 0, tmplen, addr;
- unsigned long flags;
- tda_t tda;
- int baddr;
- /* if we get called with a NULL descriptor, the Ethernet layer thinks
- our card is stuck an we should reset it. We'll do this completely: */
- if (skb == NULL) {
- printk("%s: Resetting SONICn", dev->name);
- StopSONIC(dev);
- InitBoard(dev);
- return 0; /* don't try to free the block here ;-) */
- }
- /* 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);
- IBMLANA_TOIO(dev->mem_start + 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) {
- IBMLANA_TOIO(dev->mem_start + baddr + destoffs,
- fill, l);
- destoffs += l;
- }
- }
- /* set up the new frame descriptor */
- addr = priv->tdastart + (priv->nexttxdescr * sizeof(tda_t));
- IBMLANA_FROMIO(&tda, dev->mem_start + addr, sizeof(tda_t));
- tda.length = tda.fraglength = tmplen;
- IBMLANA_TOIO(dev->mem_start + addr, &tda, sizeof(tda_t));
- /* if there were no active descriptors, trigger the SONIC */
- save_flags(flags);
- cli();
- priv->txusedcnt++;
- priv->txused[priv->nexttxdescr] = 1;
- /* are all transmission slots used up ? */
- if (priv->txusedcnt >= TXBUFCNT)
- #if (LINUX_VERSION_CODE >= 0x02032a)
- netif_stop_queue(dev);
- #else
- dev->tbusy = 1;
- #endif
- if (priv->txusedcnt == 1)
- StartTx(dev, priv->nexttxdescr);
- priv->nexttxdescr = (priv->nexttxdescr + 1) % TXBUFCNT;
- restore_flags(flags);
- tx_done:
- /* When did that change exactly ? */
- #if (LINUX_VERSION_CODE >= 0x20200)
- dev_kfree_skb(skb);
- #else
- dev_kfree_skb(skb, FREE_WRITE);
- #endif
- return retval;
- }
- /* return pointer to Ethernet statistics */
- static struct net_device_stats *ibmlana_stats(struct IBMLANA_NETDEV *dev)
- {
- ibmlana_priv *priv = (ibmlana_priv *) dev->priv;
- return &(priv->stat);
- }
- /* we don't support runtime reconfiguration, since am MCA card can
- be unambigously identified by its POS registers. */
- static int ibmlana_config(struct IBMLANA_NETDEV *dev, struct ifmap *map)
- {
- return 0;
- }
- /* switch receiver mode. */
- static void ibmlana_set_multicast_list(struct IBMLANA_NETDEV *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 */
- int ibmlana_probe(struct IBMLANA_NETDEV *dev)
- {
- int force_detect = 0;
- int slot, z;
- int base = 0, irq = 0, iobase = 0, memlen = 0;
- ibmlana_priv *priv;
- ibmlana_medium medium;
- #if (LINUX_VERSION_CODE >= 0x02032a)
- SET_MODULE_OWNER(dev);
- #endif
- /* can't work without an MCA bus ;-) */
- if (MCA_bus == 0)
- return -ENODEV;
- /* start address of 1 --> forced detection */
- if (dev->mem_start == 1)
- force_detect = 1;
- /* search through slots */
- if (dev != NULL) {
- base = dev->mem_start;
- irq = dev->irq;
- }
- slot = mca_find_adapter(IBM_LANA_ID, startslot);
- while (slot != -1) {
- /* deduce card addresses */
- getaddrs(slot, &base, &memlen, &iobase, &irq, &medium);
- #if (LINUX_VERSION_CODE >= 0x20300)
- /* slot already in use ? */
- if (mca_is_adapter_used(slot)) {
- slot = mca_find_adapter(IBM_LANA_ID, slot + 1);
- continue;
- }
- #endif
- /* were we looking for something different ? */
- if ((dev->irq != 0) || (dev->mem_start != 0)) {
- if ((dev->irq != 0) && (dev->irq != irq)) {
- slot =
- mca_find_adapter(IBM_LANA_ID,
- slot + 1);
- continue;
- }
- if ((dev->mem_start != 0)
- && (dev->mem_start != base)) {
- slot =
- mca_find_adapter(IBM_LANA_ID,
- slot + 1);
- continue;
- }
- }
- /* found something that matches */
- break;
- }
- /* nothing found ? */
- if (slot == -1)
- return ((base != 0) || (irq != 0)) ? -ENXIO : -ENODEV;
- /* announce success */
- printk("%s: IBM LAN Adapter/A found in slot %dn", dev->name,
- slot + 1);
- /* try to obtain I/O range */
- if (!request_region(iobase, IBM_LANA_IORANGE, dev->name)) {
- printk("%s: cannot allocate I/O range at %#x!n", dev->name, iobase);
- startslot = slot + 1;
- return -EBUSY;
- }
- /* make procfs entries */
- mca_set_adapter_name(slot, "IBM LAN Adapter/A");
- mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmlana_getinfo, dev);
- #if (LINUX_VERSION_CODE >= 0x20200)
- mca_mark_as_used(slot);
- #endif
- /* allocate structure */
- priv = dev->priv =
- (ibmlana_priv *) kmalloc(sizeof(ibmlana_priv), GFP_KERNEL);
- if (!priv) {
- release_region(iobase, IBM_LANA_IORANGE);
- return -ENOMEM;
- }
- priv->slot = slot;
- priv->realirq = irq;
- priv->medium = medium;
- memset(&(priv->stat), 0, sizeof(struct net_device_stats));
- /* 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;
- /* set methods */
- dev->open = ibmlana_open;
- dev->stop = ibmlana_close;
- dev->set_config = ibmlana_config;
- 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;
- /* generic setup */
- ether_setup(dev);
- /* 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("%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("%s: %s mediumn", 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 IBMLANA_NETDEV moddevs[DEVMAX];
- static int irq;
- static int io;
- MODULE_PARM(irq, "i");
- MODULE_PARM(io, "i");
- 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, res;
- startslot = 0;
- for (z = 0; z < DEVMAX; z++) {
- moddevs[z].init = ibmlana_probe;
- moddevs[z].irq = irq;
- moddevs[z].base_addr = io;
- res = register_netdev(moddevs + z);
- if (res != 0)
- return (z > 0) ? 0 : -EIO;
- }
- return 0;
- }
- void cleanup_module(void)
- {
- struct IBMLANA_NETDEV *dev;
- ibmlana_priv *priv;
- int z;
- if (MOD_IN_USE) {
- printk("cannot unload, module in usen");
- return;
- }
- for (z = 0; z < DEVMAX; z++) {
- dev = moddevs + z;
- if (dev->priv != NULL) {
- priv = (ibmlana_priv *) dev->priv;
- /*DeinitBoard(dev); */
- if (dev->irq != 0)
- free_irq(dev->irq, dev);
- dev->irq = 0;
- release_region(dev->base_addr, IBM_LANA_IORANGE);
- unregister_netdev(dev);
- #if (LINUX_VERSION_CODE >= 0x20200)
- mca_mark_as_unused(priv->slot);
- #endif
- mca_set_adapter_name(priv->slot, "");
- mca_set_adapter_procfn(priv->slot, NULL, NULL);
- kfree(dev->priv);
- dev->priv = NULL;
- }
- }
- }
- #endif /* MODULE */