diff options
Diffstat (limited to 'drivers/net/ethernet/i825xx/ni52.c')
| -rw-r--r-- | drivers/net/ethernet/i825xx/ni52.c | 1346 |
1 files changed, 1346 insertions, 0 deletions
diff --git a/drivers/net/ethernet/i825xx/ni52.c b/drivers/net/ethernet/i825xx/ni52.c new file mode 100644 index 00000000000..c0893715ef4 --- /dev/null +++ b/drivers/net/ethernet/i825xx/ni52.c @@ -0,0 +1,1346 @@ +/* + * net-3-driver for the NI5210 card (i82586 Ethernet chip) + * + * This is an extension to the Linux operating system, and is covered by the + * same GNU General Public License that covers that work. + * + * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later) + * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de) + * [feel free to mail ....] + * + * when using as module: (no autoprobing!) + * run with e.g: + * insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000 + * + * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!. + * + * If you find a bug, please report me: + * The kernel panic output and any kmsg from the ni52 driver + * the ni5210-driver-version and the linux-kernel version + * how many shared memory (memsize) on the netcard, + * bootprom: yes/no, base_addr, mem_start + * maybe the ni5210-card revision and the i82586 version + * + * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340 + * mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000, + * 0xd8000,0xcc000,0xce000,0xda000,0xdc000 + * + * sources: + * skeleton.c from Donald Becker + * + * I have also done a look in the following sources: (mail me if you need them) + * crynwr-packet-driver by Russ Nelson + * Garret A. Wollman's (fourth) i82586-driver for BSD + * (before getting an i82596 (yes 596 not 586) manual, the existing drivers + * helped me a lot to understand this tricky chip.) + * + * Known Problems: + * The internal sysbus seems to be slow. So we often lose packets because of + * overruns while receiving from a fast remote host. + * This can slow down TCP connections. Maybe the newer ni5210 cards are + * better. My experience is, that if a machine sends with more than about + * 500-600K/s the fifo/sysbus overflows. + * + * IMPORTANT NOTE: + * On fast networks, it's a (very) good idea to have 16K shared memory. With + * 8K, we can store only 4 receive frames, so it can (easily) happen that a + * remote machine 'overruns' our system. + * + * Known i82586/card problems (I'm sure, there are many more!): + * Running the NOP-mode, the i82586 sometimes seems to forget to report + * every xmit-interrupt until we restart the CU. + * Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit + * in the RBD-Struct which indicates an end of the RBD queue. + * Instead, the RU fetches another (randomly selected and + * usually used) RBD and begins to fill it. (Maybe, this happens only if + * the last buffer from the previous RFD fits exact into the queue and + * the next RFD can't fetch an initial RBD. Anyone knows more? ) + * + * results from ftp performance tests with Linux 1.2.5 + * send and receive about 350-400 KByte/s (peak up to 460 kbytes/s) + * sending in NOP-mode: peak performance up to 530K/s (but better don't + * run this mode) + */ + +/* + * 29.Sept.96: virt_to_bus changes for new memory scheme + * 19.Feb.96: more Mcast changes, module support (MH) + * + * 18.Nov.95: Mcast changes (AC). + * + * 23.April.95: fixed(?) receiving problems by configuring a RFD more + * than the number of RBD's. Can maybe cause other problems. + * 18.April.95: Added MODULE support (MH) + * 17.April.95: MC related changes in init586() and set_multicast_list(). + * removed use of 'jiffies' in init586() (MH) + * + * 19.Sep.94: Added Multicast support (not tested yet) (MH) + * + * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling. + * Now, every RFD has exact one RBD. (MH) + * + * 14.Sep.94: added promiscuous mode, a few cleanups (MH) + * + * 19.Aug.94: changed request_irq() parameter (MH) + * + * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH) + * + * 19.July.94: lotsa cleanups .. (MH) + * + * 17.July.94: some patches ... verified to run with 1.1.29 (MH) + * + * 4.July.94: patches for Linux 1.1.24 (MH) + * + * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH) + * + * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff, + * too (MH) + * + * < 30.Sep.93: first versions + */ + +static int debuglevel; /* debug-printk 0: off 1: a few 2: more */ +static int automatic_resume; /* experimental .. better should be zero */ +static int rfdadd; /* rfdadd=1 may be better for 8K MEM cards */ +static int fifo = 0x8; /* don't change */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <asm/io.h> + +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> + +#include "ni52.h" + +#define DRV_NAME "ni52" + +#define DEBUG /* debug on */ +#define SYSBUSVAL 1 /* 8 Bit */ + +#define ni_attn586() { outb(0, dev->base_addr + NI52_ATTENTION); } +#define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); } +#define ni_disint() { outb(0, dev->base_addr + NI52_INTDIS); } +#define ni_enaint() { outb(0, dev->base_addr + NI52_INTENA); } + +#define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16))) +#define make24(ptr32) ((char __iomem *)(ptr32)) - p->base +#define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\ + - p->memtop)) + +/******************* how to calculate the buffers ***************************** + + * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works + * --------------- in a different (more stable?) mode. Only in this mode it's + * possible to configure the driver with 'NO_NOPCOMMANDS' + +sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8; +sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT +sizeof(rfd) = 24; sizeof(rbd) = 12; +sizeof(tbd) = 8; sizeof(transmit_cmd) = 16; +sizeof(nop_cmd) = 8; + + * if you don't know the driver, better do not change these values: */ + +#define RECV_BUFF_SIZE 1524 /* slightly oversized */ +#define XMIT_BUFF_SIZE 1524 /* slightly oversized */ +#define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */ +#define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */ +#define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */ +#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ + +/**************************************************************************/ + + +#define NI52_TOTAL_SIZE 16 +#define NI52_ADDR0 0x02 +#define NI52_ADDR1 0x07 +#define NI52_ADDR2 0x01 + +static int ni52_probe1(struct net_device *dev, int ioaddr); +static irqreturn_t ni52_interrupt(int irq, void *dev_id); +static int ni52_open(struct net_device *dev); +static int ni52_close(struct net_device *dev); +static netdev_tx_t ni52_send_packet(struct sk_buff *, struct net_device *); +static struct net_device_stats *ni52_get_stats(struct net_device *dev); +static void set_multicast_list(struct net_device *dev); +static void ni52_timeout(struct net_device *dev); + +/* helper-functions */ +static int init586(struct net_device *dev); +static int check586(struct net_device *dev, unsigned size); +static void alloc586(struct net_device *dev); +static void startrecv586(struct net_device *dev); +static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr); +static void ni52_rcv_int(struct net_device *dev); +static void ni52_xmt_int(struct net_device *dev); +static void ni52_rnr_int(struct net_device *dev); + +struct priv { + char __iomem *base; + char __iomem *mapped; + char __iomem *memtop; + spinlock_t spinlock; + int reset; + struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first; + struct scp_struct __iomem *scp; + struct iscp_struct __iomem *iscp; + struct scb_struct __iomem *scb; + struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS]; +#if (NUM_XMIT_BUFFS == 1) + struct transmit_cmd_struct __iomem *xmit_cmds[2]; + struct nop_cmd_struct __iomem *nop_cmds[2]; +#else + struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS]; + struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS]; +#endif + int nop_point, num_recv_buffs; + char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS]; + int xmit_count, xmit_last; +}; + +/* wait for command with timeout: */ +static void wait_for_scb_cmd(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + int i; + for (i = 0; i < 16384; i++) { + if (readb(&p->scb->cmd_cuc) == 0) + break; + udelay(4); + if (i == 16383) { + printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n", + dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus)); + if (!p->reset) { + p->reset = 1; + ni_reset586(); + } + } + } +} + +static void wait_for_scb_cmd_ruc(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + int i; + for (i = 0; i < 16384; i++) { + if (readb(&p->scb->cmd_ruc) == 0) + break; + udelay(4); + if (i == 16383) { + printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n", + dev->name, readb(&p->scb->cmd_ruc), + readb(&p->scb->rus)); + if (!p->reset) { + p->reset = 1; + ni_reset586(); + } + } + } +} + +static void wait_for_stat_compl(void __iomem *p) +{ + struct nop_cmd_struct __iomem *addr = p; + int i; + for (i = 0; i < 32767; i++) { + if (readw(&((addr)->cmd_status)) & STAT_COMPL) + break; + udelay(32); + } +} + +/********************************************** + * close device + */ +static int ni52_close(struct net_device *dev) +{ + free_irq(dev->irq, dev); + ni_reset586(); /* the hard way to stop the receiver */ + netif_stop_queue(dev); + return 0; +} + +/********************************************** + * open device + */ +static int ni52_open(struct net_device *dev) +{ + int ret; + + ni_disint(); + alloc586(dev); + init586(dev); + startrecv586(dev); + ni_enaint(); + + ret = request_irq(dev->irq, ni52_interrupt, 0, dev->name, dev); + if (ret) { + ni_reset586(); + return ret; + } + netif_start_queue(dev); + return 0; /* most done by init */ +} + +static int check_iscp(struct net_device *dev, void __iomem *addr) +{ + struct iscp_struct __iomem *iscp = addr; + struct priv *p = netdev_priv(dev); + memset_io(iscp, 0, sizeof(struct iscp_struct)); + + writel(make24(iscp), &p->scp->iscp); + writeb(1, &iscp->busy); + + ni_reset586(); + ni_attn586(); + mdelay(32); /* wait a while... */ + /* i82586 clears 'busy' after successful init */ + if (readb(&iscp->busy)) + return 0; + return 1; +} + +/********************************************** + * Check to see if there's an 82586 out there. + */ +static int check586(struct net_device *dev, unsigned size) +{ + struct priv *p = netdev_priv(dev); + int i; + + p->mapped = ioremap(dev->mem_start, size); + if (!p->mapped) + return 0; + + p->base = p->mapped + size - 0x01000000; + p->memtop = p->mapped + size; + p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS); + p->scb = (struct scb_struct __iomem *) p->mapped; + p->iscp = (struct iscp_struct __iomem *)p->scp - 1; + memset_io(p->scp, 0, sizeof(struct scp_struct)); + for (i = 0; i < sizeof(struct scp_struct); i++) + /* memory was writeable? */ + if (readb((char __iomem *)p->scp + i)) + goto Enodev; + writeb(SYSBUSVAL, &p->scp->sysbus); /* 1 = 8Bit-Bus, 0 = 16 Bit */ + if (readb(&p->scp->sysbus) != SYSBUSVAL) + goto Enodev; + + if (!check_iscp(dev, p->mapped)) + goto Enodev; + if (!check_iscp(dev, p->iscp)) + goto Enodev; + return 1; +Enodev: + iounmap(p->mapped); + return 0; +} + +/****************************************************************** + * set iscp at the right place, called by ni52_probe1 and open586. + */ +static void alloc586(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + ni_reset586(); + mdelay(32); + + memset_io(p->iscp, 0, sizeof(struct iscp_struct)); + memset_io(p->scp , 0, sizeof(struct scp_struct)); + + writel(make24(p->iscp), &p->scp->iscp); + writeb(SYSBUSVAL, &p->scp->sysbus); + writew(make16(p->scb), &p->iscp->scb_offset); + + writeb(1, &p->iscp->busy); + ni_reset586(); + ni_attn586(); + + mdelay(32); + + if (readb(&p->iscp->busy)) + printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name); + + p->reset = 0; + + memset_io(p->scb, 0, sizeof(struct scb_struct)); +} + +/* set: io,irq,memstart,memend or set it when calling insmod */ +static int irq = 9; +static int io = 0x300; +static long memstart; /* e.g 0xd0000 */ +static long memend; /* e.g 0xd4000 */ + +/********************************************** + * probe the ni5210-card + */ +struct net_device * __init ni52_probe(int unit) +{ + struct net_device *dev = alloc_etherdev(sizeof(struct priv)); + static const int ports[] = {0x300, 0x280, 0x360, 0x320, 0x340, 0}; + const int *port; + struct priv *p; + int err = 0; + + if (!dev) + return ERR_PTR(-ENOMEM); + + p = netdev_priv(dev); + + if (unit >= 0) { + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + io = dev->base_addr; + irq = dev->irq; + memstart = dev->mem_start; + memend = dev->mem_end; + } + + if (io > 0x1ff) { /* Check a single specified location. */ + err = ni52_probe1(dev, io); + } else if (io > 0) { /* Don't probe at all. */ + err = -ENXIO; + } else { + for (port = ports; *port && ni52_probe1(dev, *port) ; port++) + ; + if (*port) + goto got_it; +#ifdef FULL_IO_PROBE + for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8) + ; + if (io < 0x400) + goto got_it; +#endif + err = -ENODEV; + } + if (err) + goto out; +got_it: + err = register_netdev(dev); + if (err) + goto out1; + return dev; +out1: + iounmap(p->mapped); + release_region(dev->base_addr, NI52_TOTAL_SIZE); +out: + free_netdev(dev); + return ERR_PTR(err); +} + +static const struct net_device_ops ni52_netdev_ops = { + .ndo_open = ni52_open, + .ndo_stop = ni52_close, + .ndo_get_stats = ni52_get_stats, + .ndo_tx_timeout = ni52_timeout, + .ndo_start_xmit = ni52_send_packet, + .ndo_set_rx_mode = set_multicast_list, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int __init ni52_probe1(struct net_device *dev, int ioaddr) +{ + int i, size, retval; + struct priv *priv = netdev_priv(dev); + + dev->base_addr = ioaddr; + dev->irq = irq; + dev->mem_start = memstart; + dev->mem_end = memend; + + spin_lock_init(&priv->spinlock); + + if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME)) + return -EBUSY; + + if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) || + !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) { + retval = -ENODEV; + goto out; + } + + for (i = 0; i < ETH_ALEN; i++) + dev->dev_addr[i] = inb(dev->base_addr+i); + + if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1 || + dev->dev_addr[2] != NI52_ADDR2) { + retval = -ENODEV; + goto out; + } + + printk(KERN_INFO "%s: NI5210 found at %#3lx, ", + dev->name, dev->base_addr); + + /* + * check (or search) IO-Memory, 8K and 16K + */ +#ifdef MODULE + size = dev->mem_end - dev->mem_start; + if (size != 0x2000 && size != 0x4000) { + printk("\n"); + printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size); + retval = -ENODEV; + goto out; + } + if (!check586(dev, size)) { + printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size); + retval = -ENODEV; + goto out; + } +#else + if (dev->mem_start != 0) { + /* no auto-mem-probe */ + size = 0x4000; /* check for 16K mem */ + if (!check586(dev, size)) { + size = 0x2000; /* check for 8K mem */ + if (!check586(dev, size)) { + printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start); + retval = -ENODEV; + goto out; + } + } + } else { + static const unsigned long memaddrs[] = { + 0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000, + 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0 + }; + for (i = 0;; i++) { + if (!memaddrs[i]) { + printk(KERN_ERR "?memprobe, Can't find io-memory!\n"); + retval = -ENODEV; + goto out; + } + dev->mem_start = memaddrs[i]; + size = 0x2000; /* check for 8K mem */ + if (check586(dev, size)) + /* 8K-check */ + break; + size = 0x4000; /* check for 16K mem */ + if (check586(dev, size)) + /* 16K-check */ + break; + } + } + /* set mem_end showed by 'ifconfig' */ + dev->mem_end = dev->mem_start + size; +#endif + + alloc586(dev); + + /* set number of receive-buffs according to memsize */ + if (size == 0x2000) + priv->num_recv_buffs = NUM_RECV_BUFFS_8; + else + priv->num_recv_buffs = NUM_RECV_BUFFS_16; + + printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ", + dev->mem_start, size); + + if (dev->irq < 2) { + unsigned long irq_mask; + + irq_mask = probe_irq_on(); + ni_reset586(); + ni_attn586(); + + mdelay(20); + dev->irq = probe_irq_off(irq_mask); + if (!dev->irq) { + printk("?autoirq, Failed to detect IRQ line!\n"); + retval = -EAGAIN; + iounmap(priv->mapped); + goto out; + } + printk("IRQ %d (autodetected).\n", dev->irq); + } else { + if (dev->irq == 2) + dev->irq = 9; + printk("IRQ %d (assigned and not checked!).\n", dev->irq); + } + + dev->netdev_ops = &ni52_netdev_ops; + dev->watchdog_timeo = HZ/20; + + return 0; +out: + release_region(ioaddr, NI52_TOTAL_SIZE); + return retval; +} + +/********************************************** + * init the chip (ni52-interrupt should be disabled?!) + * needs a correct 'allocated' memory + */ + +static int init586(struct net_device *dev) +{ + void __iomem *ptr; + int i, result = 0; + struct priv *p = netdev_priv(dev); + struct configure_cmd_struct __iomem *cfg_cmd; + struct iasetup_cmd_struct __iomem *ias_cmd; + struct tdr_cmd_struct __iomem *tdr_cmd; + struct mcsetup_cmd_struct __iomem *mc_cmd; + struct netdev_hw_addr *ha; + int num_addrs = netdev_mc_count(dev); + + ptr = p->scb + 1; + + cfg_cmd = ptr; /* configure-command */ + writew(0, &cfg_cmd->cmd_status); + writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd); + writew(0xFFFF, &cfg_cmd->cmd_link); + + /* number of cfg bytes */ + writeb(0x0a, &cfg_cmd->byte_cnt); + /* fifo-limit (8=tx:32/rx:64) */ + writeb(fifo, &cfg_cmd->fifo); + /* hold or discard bad recv frames (bit 7) */ + writeb(0x40, &cfg_cmd->sav_bf); + /* addr_len |!src_insert |pre-len |loopback */ + writeb(0x2e, &cfg_cmd->adr_len); + writeb(0x00, &cfg_cmd->priority); + writeb(0x60, &cfg_cmd->ifs); + writeb(0x00, &cfg_cmd->time_low); + writeb(0xf2, &cfg_cmd->time_high); + writeb(0x00, &cfg_cmd->promisc); + if (dev->flags & IFF_ALLMULTI) { + int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6; + if (num_addrs > len) { + printk(KERN_ERR "%s: switching to promisc. mode\n", + dev->name); + writeb(0x01, &cfg_cmd->promisc); + } + } + if (dev->flags & IFF_PROMISC) + writeb(0x01, &cfg_cmd->promisc); + writeb(0x00, &cfg_cmd->carr_coll); + writew(make16(cfg_cmd), &p->scb->cbl_offset); + writeb(0, &p->scb->cmd_ruc); + + writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */ + ni_attn586(); + + wait_for_stat_compl(cfg_cmd); + + if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != + (STAT_COMPL|STAT_OK)) { + printk(KERN_ERR "%s: configure command failed: %x\n", + dev->name, readw(&cfg_cmd->cmd_status)); + return 1; + } + + /* + * individual address setup + */ + + ias_cmd = ptr; + + writew(0, &ias_cmd->cmd_status); + writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd); + writew(0xffff, &ias_cmd->cmd_link); + + memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN); + + writew(make16(ias_cmd), &p->scb->cbl_offset); + + writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */ + ni_attn586(); + + wait_for_stat_compl(ias_cmd); + + if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != + (STAT_OK|STAT_COMPL)) { + printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status)); + return 1; + } + + /* + * TDR, wire check .. e.g. no resistor e.t.c + */ + + tdr_cmd = ptr; + + writew(0, &tdr_cmd->cmd_status); + writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd); + writew(0xffff, &tdr_cmd->cmd_link); + writew(0, &tdr_cmd->status); + + writew(make16(tdr_cmd), &p->scb->cbl_offset); + writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */ + ni_attn586(); + + wait_for_stat_compl(tdr_cmd); + + if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL)) + printk(KERN_ERR "%s: Problems while running the TDR.\n", + dev->name); + else { + udelay(16); + result = readw(&tdr_cmd->status); + writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc); + ni_attn586(); /* ack the interrupts */ + + if (result & TDR_LNK_OK) + ; + else if (result & TDR_XCVR_PRB) + printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n", + dev->name); + else if (result & TDR_ET_OPN) + printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n", + dev->name, result & TDR_TIMEMASK); + else if (result & TDR_ET_SRT) { + /* time == 0 -> strange :-) */ + if (result & TDR_TIMEMASK) + printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n", + dev->name, result & TDR_TIMEMASK); + } else + printk(KERN_ERR "%s: TDR: Unknown status %04x\n", + dev->name, result); + } + + /* + * Multicast setup + */ + if (num_addrs && !(dev->flags & IFF_PROMISC)) { + mc_cmd = ptr; + writew(0, &mc_cmd->cmd_status); + writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd); + writew(0xffff, &mc_cmd->cmd_link); + writew(num_addrs * 6, &mc_cmd->mc_cnt); + + i = 0; + netdev_for_each_mc_addr(ha, dev) + memcpy_toio(mc_cmd->mc_list[i++], ha->addr, 6); + + writew(make16(mc_cmd), &p->scb->cbl_offset); + writeb(CUC_START, &p->scb->cmd_cuc); + ni_attn586(); + + wait_for_stat_compl(mc_cmd); + + if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) + != (STAT_COMPL|STAT_OK)) + printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name); + } + + /* + * alloc nop/xmit-cmds + */ +#if (NUM_XMIT_BUFFS == 1) + for (i = 0; i < 2; i++) { + p->nop_cmds[i] = ptr; + writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd); + writew(0, &p->nop_cmds[i]->cmd_status); + writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link); + ptr = ptr + sizeof(struct nop_cmd_struct); + } +#else + for (i = 0; i < NUM_XMIT_BUFFS; i++) { + p->nop_cmds[i] = ptr; + writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd); + writew(0, &p->nop_cmds[i]->cmd_status); + writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link); + ptr = ptr + sizeof(struct nop_cmd_struct); + } +#endif + + ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */ + + /* + * alloc xmit-buffs / init xmit_cmds + */ + for (i = 0; i < NUM_XMIT_BUFFS; i++) { + /* Transmit cmd/buff 0 */ + p->xmit_cmds[i] = ptr; + ptr = ptr + sizeof(struct transmit_cmd_struct); + p->xmit_cbuffs[i] = ptr; /* char-buffs */ + ptr = ptr + XMIT_BUFF_SIZE; + p->xmit_buffs[i] = ptr; /* TBD */ + ptr = ptr + sizeof(struct tbd_struct); + if ((void __iomem *)ptr > (void __iomem *)p->iscp) { + printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", + dev->name); + return 1; + } + memset_io(p->xmit_cmds[i], 0, + sizeof(struct transmit_cmd_struct)); + memset_io(p->xmit_buffs[i], 0, + sizeof(struct tbd_struct)); + writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]), + &p->xmit_cmds[i]->cmd_link); + writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status); + writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd); + writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset); + writew(0xffff, &p->xmit_buffs[i]->next); + writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer); + } + + p->xmit_count = 0; + p->xmit_last = 0; +#ifndef NO_NOPCOMMANDS + p->nop_point = 0; +#endif + + /* + * 'start transmitter' + */ +#ifndef NO_NOPCOMMANDS + writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset); + writeb(CUC_START, &p->scb->cmd_cuc); + ni_attn586(); + wait_for_scb_cmd(dev); +#else + writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link); + writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd); +#endif + + /* + * ack. interrupts + */ + writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc); + ni_attn586(); + udelay(16); + + ni_enaint(); + + return 0; +} + +/****************************************************** + * This is a helper routine for ni52_rnr_int() and init586(). + * It sets up the Receive Frame Area (RFA). + */ + +static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr) +{ + struct rfd_struct __iomem *rfd = ptr; + struct rbd_struct __iomem *rbd; + int i; + struct priv *p = netdev_priv(dev); + + memset_io(rfd, 0, + sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd)); + p->rfd_first = rfd; + + for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) { + writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)), + &rfd[i].next); + writew(0xffff, &rfd[i].rbd_offset); + } + /* RU suspend */ + writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last); + + ptr = rfd + (p->num_recv_buffs + rfdadd); + + rbd = ptr; + ptr = rbd + p->num_recv_buffs; + + /* clr descriptors */ + memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs)); + + for (i = 0; i < p->num_recv_buffs; i++) { + writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next); + writew(RECV_BUFF_SIZE, &rbd[i].size); + writel(make24(ptr), &rbd[i].buffer); + ptr = ptr + RECV_BUFF_SIZE; + } + p->rfd_top = p->rfd_first; + p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd); + + writew(make16(p->rfd_first), &p->scb->rfa_offset); + writew(make16(rbd), &p->rfd_first->rbd_offset); + + return ptr; +} + + +/************************************************** + * Interrupt Handler ... + */ + +static irqreturn_t ni52_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + unsigned int stat; + int cnt = 0; + struct priv *p; + + p = netdev_priv(dev); + + if (debuglevel > 1) + printk("I"); + + spin_lock(&p->spinlock); + + wait_for_scb_cmd(dev); /* wait for last command */ + + while ((stat = readb(&p->scb->cus) & STAT_MASK)) { + writeb(stat, &p->scb->cmd_cuc); + ni_attn586(); + + if (stat & STAT_FR) /* received a frame */ + ni52_rcv_int(dev); + + if (stat & STAT_RNR) { /* RU went 'not ready' */ + printk("(R)"); + if (readb(&p->scb->rus) & RU_SUSPEND) { + /* special case: RU_SUSPEND */ + wait_for_scb_cmd(dev); + writeb(RUC_RESUME, &p->scb->cmd_ruc); + ni_attn586(); + wait_for_scb_cmd_ruc(dev); + } else { + printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n", + dev->name, stat, readb(&p->scb->rus)); + ni52_rnr_int(dev); + } + } + + /* Command with I-bit set complete */ + if (stat & STAT_CX) + ni52_xmt_int(dev); + +#ifndef NO_NOPCOMMANDS + if (stat & STAT_CNA) { /* CU went 'not ready' */ + if (netif_running(dev)) + printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n", + dev->name, stat, readb(&p->scb->cus)); + } +#endif + + if (debuglevel > 1) + printk("%d", cnt++); + + /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */ + wait_for_scb_cmd(dev); + if (readb(&p->scb->cmd_cuc)) { /* timed out? */ + printk(KERN_ERR "%s: Acknowledge timed out.\n", + dev->name); + ni_disint(); + break; + } + } + spin_unlock(&p->spinlock); + + if (debuglevel > 1) + printk("i"); + return IRQ_HANDLED; +} + +/******************************************************* + * receive-interrupt + */ + +static void ni52_rcv_int(struct net_device *dev) +{ + int status, cnt = 0; + unsigned short totlen; + struct sk_buff *skb; + struct rbd_struct __iomem *rbd; + struct priv *p = netdev_priv(dev); + + if (debuglevel > 0) + printk("R"); + + for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) { + rbd = make32(readw(&p->rfd_top->rbd_offset)); + if (status & RFD_OK) { /* frame received without error? */ + totlen = readw(&rbd->status); + if (totlen & RBD_LAST) { + /* the first and the last buffer? */ + totlen &= RBD_MASK; /* length of this frame */ + writew(0x00, &rbd->status); + skb = (struct sk_buff *)dev_alloc_skb(totlen+2); + if (skb != NULL) { + skb_reserve(skb, 2); + skb_put(skb, totlen); + memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen); + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += totlen; + } else + dev->stats.rx_dropped++; + } else { + int rstat; + /* free all RBD's until RBD_LAST is set */ + totlen = 0; + while (!((rstat = readw(&rbd->status)) & RBD_LAST)) { + totlen += rstat & RBD_MASK; + if (!rstat) { + printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name); + break; + } + writew(0, &rbd->status); + rbd = make32(readw(&rbd->next)); + } + totlen += rstat & RBD_MASK; + writew(0, &rbd->status); + printk(KERN_ERR "%s: received oversized frame! length: %d\n", + dev->name, totlen); + dev->stats.rx_dropped++; + } + } else {/* frame !(ok), only with 'save-bad-frames' */ + printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n", + dev->name, status); + dev->stats.rx_errors++; + } + writeb(0, &p->rfd_top->stat_high); + writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */ + writew(0xffff, &p->rfd_top->rbd_offset); + writeb(0, &p->rfd_last->last); /* delete RFD_SUSP */ + p->rfd_last = p->rfd_top; + p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */ + writew(make16(p->rfd_top), &p->scb->rfa_offset); + + if (debuglevel > 0) + printk("%d", cnt++); + } + + if (automatic_resume) { + wait_for_scb_cmd(dev); + writeb(RUC_RESUME, &p->scb->cmd_ruc); + ni_attn586(); + wait_for_scb_cmd_ruc(dev); + } + +#ifdef WAIT_4_BUSY + { + int i; + for (i = 0; i < 1024; i++) { + if (p->rfd_top->status) + break; + udelay(16); + if (i == 1023) + printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name); + } + } +#endif + if (debuglevel > 0) + printk("r"); +} + +/********************************************************** + * handle 'Receiver went not ready'. + */ + +static void ni52_rnr_int(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + dev->stats.rx_errors++; + + wait_for_scb_cmd(dev); /* wait for the last cmd, WAIT_4_FULLSTAT?? */ + writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */ + ni_attn586(); + wait_for_scb_cmd_ruc(dev); /* wait for accept cmd. */ + + alloc_rfa(dev, p->rfd_first); + /* maybe add a check here, before restarting the RU */ + startrecv586(dev); /* restart RU */ + + printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", + dev->name, readb(&p->scb->rus)); + +} + +/********************************************************** + * handle xmit - interrupt + */ + +static void ni52_xmt_int(struct net_device *dev) +{ + int status; + struct priv *p = netdev_priv(dev); + + if (debuglevel > 0) + printk("X"); + + status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status); + if (!(status & STAT_COMPL)) + printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name); + + if (status & STAT_OK) { + dev->stats.tx_packets++; + dev->stats.collisions += (status & TCMD_MAXCOLLMASK); + } else { + dev->stats.tx_errors++; + if (status & TCMD_LATECOLL) { + printk(KERN_ERR "%s: late collision detected.\n", + dev->name); + dev->stats.collisions++; + } else if (status & TCMD_NOCARRIER) { + dev->stats.tx_carrier_errors++; + printk(KERN_ERR "%s: no carrier detected.\n", + dev->name); + } else if (status & TCMD_LOSTCTS) + printk(KERN_ERR "%s: loss of CTS detected.\n", + dev->name); + else if (status & TCMD_UNDERRUN) { + dev->stats.tx_fifo_errors++; + printk(KERN_ERR "%s: DMA underrun detected.\n", + dev->name); + } else if (status & TCMD_MAXCOLL) { + printk(KERN_ERR "%s: Max. collisions exceeded.\n", + dev->name); + dev->stats.collisions += 16; + } + } +#if (NUM_XMIT_BUFFS > 1) + if ((++p->xmit_last) == NUM_XMIT_BUFFS) + p->xmit_last = 0; +#endif + netif_wake_queue(dev); +} + +/*********************************************************** + * (re)start the receiver + */ + +static void startrecv586(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + wait_for_scb_cmd(dev); + wait_for_scb_cmd_ruc(dev); + writew(make16(p->rfd_first), &p->scb->rfa_offset); + writeb(RUC_START, &p->scb->cmd_ruc); + ni_attn586(); /* start cmd. */ + wait_for_scb_cmd_ruc(dev); + /* wait for accept cmd. (no timeout!!) */ +} + +static void ni52_timeout(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); +#ifndef NO_NOPCOMMANDS + if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */ + netif_wake_queue(dev); +#ifdef DEBUG + printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n", + dev->name); + printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n", + dev->name, (int)p->xmit_cmds[0]->cmd_status, + readw(&p->nop_cmds[0]->cmd_status), + readw(&p->nop_cmds[1]->cmd_status), + p->nop_point); +#endif + writeb(CUC_ABORT, &p->scb->cmd_cuc); + ni_attn586(); + wait_for_scb_cmd(dev); + writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset); + writeb(CUC_START, &p->scb->cmd_cuc); + ni_attn586(); + wait_for_scb_cmd(dev); + dev->trans_start = jiffies; /* prevent tx timeout */ + return 0; + } +#endif + { +#ifdef DEBUG + printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n", + dev->name, readb(&p->scb->cus)); + printk(KERN_ERR "%s: command-stats: %04x %04x\n", + dev->name, + readw(&p->xmit_cmds[0]->cmd_status), + readw(&p->xmit_cmds[1]->cmd_status)); + printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n", + dev->name); +#endif + ni52_close(dev); + ni52_open(dev); + } + dev->trans_start = jiffies; /* prevent tx timeout */ +} + +/****************************************************** + * send frame + */ + +static netdev_tx_t ni52_send_packet(struct sk_buff *skb, + struct net_device *dev) +{ + int len, i; +#ifndef NO_NOPCOMMANDS + int next_nop; +#endif + struct priv *p = netdev_priv(dev); + + if (skb->len > XMIT_BUFF_SIZE) { + printk(KERN_ERR "%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n", dev->name, XMIT_BUFF_SIZE, skb->len); + return NETDEV_TX_OK; + } + + netif_stop_queue(dev); + + memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len); + len = skb->len; + if (len < ETH_ZLEN) { + len = ETH_ZLEN; + memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0, + len - skb->len); + } + +#if (NUM_XMIT_BUFFS == 1) +# ifdef NO_NOPCOMMANDS + +#ifdef DEBUG + if (readb(&p->scb->cus) & CU_ACTIVE) { + printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name); + printk(KERN_ERR "%s: stat: %04x %04x\n", + dev->name, readb(&p->scb->cus), + readw(&p->xmit_cmds[0]->cmd_status)); + } +#endif + writew(TBD_LAST | len, &p->xmit_buffs[0]->size); + for (i = 0; i < 16; i++) { + writew(0, &p->xmit_cmds[0]->cmd_status); + wait_for_scb_cmd(dev); + if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND) + writeb(CUC_RESUME, &p->scb->cmd_cuc); + else { + writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset); + writeb(CUC_START, &p->scb->cmd_cuc); + } + ni_attn586(); + if (!i) + dev_kfree_skb(skb); + wait_for_scb_cmd(dev); + /* test it, because CU sometimes doesn't start immediately */ + if (readb(&p->scb->cus) & CU_ACTIVE) + break; + if (readw(&p->xmit_cmds[0]->cmd_status)) + break; + if (i == 15) + printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name); + } +# else + next_nop = (p->nop_point + 1) & 0x1; + writew(TBD_LAST | len, &p->xmit_buffs[0]->size); + writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link); + writew(make16(p->nop_cmds[next_nop]), + &p->nop_cmds[next_nop]->cmd_link); + writew(0, &p->xmit_cmds[0]->cmd_status); + writew(0, &p->nop_cmds[next_nop]->cmd_status); + + writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link); + p->nop_point = next_nop; + dev_kfree_skb(skb); +# endif +#else + writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size); + next_nop = p->xmit_count + 1 + if (next_nop == NUM_XMIT_BUFFS) + next_nop = 0; + writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status); + /* linkpointer of xmit-command already points to next nop cmd */ + writew(make16(p->nop_cmds[next_nop]), + &p->nop_cmds[next_nop]->cmd_link); + writew(0, &p->nop_cmds[next_nop]->cmd_status); + writew(make16(p->xmit_cmds[p->xmit_count]), + &p->nop_cmds[p->xmit_count]->cmd_link); + p->xmit_count = next_nop; + { + unsigned long flags; + spin_lock_irqsave(&p->spinlock); + if (p->xmit_count != p->xmit_last) + netif_wake_queue(dev); + spin_unlock_irqrestore(&p->spinlock); + } + dev_kfree_skb(skb); +#endif + return NETDEV_TX_OK; +} + +/******************************************* + * Someone wanna have the statistics + */ + +static struct net_device_stats *ni52_get_stats(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + unsigned short crc, aln, rsc, ovrn; + + /* Get error-statistics from the ni82586 */ + crc = readw(&p->scb->crc_errs); + writew(0, &p->scb->crc_errs); + aln = readw(&p->scb->aln_errs); + writew(0, &p->scb->aln_errs); + rsc = readw(&p->scb->rsc_errs); + writew(0, &p->scb->rsc_errs); + ovrn = readw(&p->scb->ovrn_errs); + writew(0, &p->scb->ovrn_errs); + + dev->stats.rx_crc_errors += crc; + dev->stats.rx_fifo_errors += ovrn; + dev->stats.rx_frame_errors += aln; + dev->stats.rx_dropped += rsc; + + return &dev->stats; +} + +/******************************************************** + * Set MC list .. + */ + +static void set_multicast_list(struct net_device *dev) +{ + netif_stop_queue(dev); + ni_disint(); + alloc586(dev); + init586(dev); + startrecv586(dev); + ni_enaint(); + netif_wake_queue(dev); +} + +#ifdef MODULE +static struct net_device *dev_ni52; + +module_param(io, int, 0); +module_param(irq, int, 0); +module_param(memstart, long, 0); +module_param(memend, long, 0); +MODULE_PARM_DESC(io, "NI5210 I/O base address,required"); +MODULE_PARM_DESC(irq, "NI5210 IRQ number,required"); +MODULE_PARM_DESC(memstart, "NI5210 memory base address,required"); +MODULE_PARM_DESC(memend, "NI5210 memory end address,required"); + +int __init init_module(void) +{ + if (io <= 0x0 || !memend || !memstart || irq < 2) { + printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n"); + printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n"); + return -ENODEV; + } + dev_ni52 = ni52_probe(-1); + if (IS_ERR(dev_ni52)) + return PTR_ERR(dev_ni52); + return 0; +} + +void __exit cleanup_module(void) +{ + struct priv *p = netdev_priv(dev_ni52); + unregister_netdev(dev_ni52); + iounmap(p->mapped); + release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE); + free_netdev(dev_ni52); +} +#endif /* MODULE */ + +MODULE_LICENSE("GPL"); |