diff options
Diffstat (limited to 'drivers/net/ethernet/i825xx/3c523.c')
| -rw-r--r-- | drivers/net/ethernet/i825xx/3c523.c | 1312 |
1 files changed, 1312 insertions, 0 deletions
diff --git a/drivers/net/ethernet/i825xx/3c523.c b/drivers/net/ethernet/i825xx/3c523.c new file mode 100644 index 000000000000..bc0d1a1c2e28 --- /dev/null +++ b/drivers/net/ethernet/i825xx/3c523.c @@ -0,0 +1,1312 @@ +/* + net-3-driver for the 3c523 Etherlink/MC 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. + + Copyright 1995, 1996 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca) + + This is basically Michael Hipp's ni52 driver, with a new probing + algorithm and some minor changes to the 82586 CA and reset routines. + Thanks a lot Michael for a really clean i82586 implementation! Unless + otherwise documented in ni52.c, any bugs are mine. + + Contrary to the Ethernet-HOWTO, this isn't based on the 3c507 driver in + any way. The ni52 is a lot easier to modify. + + sources: + ni52.c + + Crynwr packet driver collection was a great reference for my first + attempt at this sucker. The 3c507 driver also helped, until I noticed + that ni52.c was a lot nicer. + + EtherLink/MC: Micro Channel Ethernet Adapter Technical Reference + Manual, courtesy of 3Com CardFacts, documents the 3c523-specific + stuff. Information on CardFacts is found in the Ethernet HOWTO. + Also see <a href="http://www.3com.com/"> + + Microprocessor Communications Support Chips, T.J. Byers, ISBN + 0-444-01224-9, has a section on the i82586. It tells you just enough + to know that you really don't want to learn how to program the chip. + + The original device probe code was stolen from ps2esdi.c + + Known Problems: + Since most of the code was stolen from ni52.c, you'll run across the + same bugs in the 0.62 version of ni52.c, plus maybe a few because of + the 3c523 idiosynchacies. The 3c523 has 16K of RAM though, so there + shouldn't be the overrun problem that the 8K ni52 has. + + This driver is for a 16K adapter. It should work fine on the 64K + adapters, but it will only use one of the 4 banks of RAM. Modifying + this for the 64K version would require a lot of heinous bank + switching, which I'm sure not interested in doing. If you try to + implement a bank switching version, you'll basically have to remember + what bank is enabled and do a switch every time you access a memory + location that's not current. You'll also have to remap pointers on + the driver side, because it only knows about 16K of the memory. + Anyone desperate or masochistic enough to try? + + It seems to be stable now when multiple transmit buffers are used. I + can't see any performance difference, but then I'm working on a 386SX. + + Multicast doesn't work. It doesn't even pretend to work. Don't use + it. Don't compile your kernel with multicast support. I don't know + why. + + Features: + This driver is useable as a loadable module. If you try to specify an + IRQ or a IO address (via insmod 3c523.o irq=xx io=0xyyy), it will + search the MCA slots until it finds a 3c523 with the specified + parameters. + + This driver does support multiple ethernet cards when used as a module + (up to MAX_3C523_CARDS, the default being 4) + + This has been tested with both BNC and TP versions, internal and + external transceivers. Haven't tested with the 64K version (that I + know of). + + History: + Jan 1st, 1996 + first public release + Feb 4th, 1996 + update to 1.3.59, incorporated multicast diffs from ni52.c + Feb 15th, 1996 + added shared irq support + Apr 1999 + added support for multiple cards when used as a module + added option to disable multicast as is causes problems + Ganesh Sittampalam <ganesh.sittampalam@magdalen.oxford.ac.uk> + Stuart Adamson <stuart.adamson@compsoc.net> + Nov 2001 + added support for ethtool (jgarzik) + + $Header: /fsys2/home/chrisb/linux-1.3.59-MCA/drivers/net/RCS/3c523.c,v 1.1 1996/02/05 01:53:46 chrisb Exp chrisb $ + */ + +#define DRV_NAME "3c523" +#define DRV_VERSION "17-Nov-2001" + +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/skbuff.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/mca-legacy.h> +#include <linux/ethtool.h> +#include <linux/bitops.h> +#include <linux/jiffies.h> + +#include <asm/uaccess.h> +#include <asm/processor.h> +#include <asm/io.h> + +#include "3c523.h" + +/*************************************************************************/ +#define DEBUG /* debug on */ +#define SYSBUSVAL 0 /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */ +#undef ELMC_MULTICAST /* Disable multicast support as it is somewhat seriously broken at the moment */ + +#define make32(ptr16) (p->memtop + (short) (ptr16) ) +#define make24(ptr32) ((char *) (ptr32) - p->base) +#define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop )) + +/*************************************************************************/ +/* + Tables to which we can map values in the configuration registers. + */ +static int irq_table[] __initdata = { + 12, 7, 3, 9 +}; + +static int csr_table[] __initdata = { + 0x300, 0x1300, 0x2300, 0x3300 +}; + +static int shm_table[] __initdata = { + 0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000 +}; + +/******************* 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 this 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 */ + +#if (NUM_XMIT_BUFFS == 1) +#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ +#endif + +/**************************************************************************/ + +#define DELAY(x) { mdelay(32 * x); } + +/* a much shorter delay: */ +#define DELAY_16(); { udelay(16) ; } + +/* wait for command with timeout: */ +#define WAIT_4_SCB_CMD() { int i; \ + for(i=0;i<1024;i++) { \ + if(!p->scb->cmd) break; \ + DELAY_16(); \ + if(i == 1023) { \ + pr_warning("%s:%d: scb_cmd timed out .. resetting i82586\n",\ + dev->name,__LINE__); \ + elmc_id_reset586(); } } } + +static irqreturn_t elmc_interrupt(int irq, void *dev_id); +static int elmc_open(struct net_device *dev); +static int elmc_close(struct net_device *dev); +static netdev_tx_t elmc_send_packet(struct sk_buff *, struct net_device *); +static struct net_device_stats *elmc_get_stats(struct net_device *dev); +static void elmc_timeout(struct net_device *dev); +#ifdef ELMC_MULTICAST +static void set_multicast_list(struct net_device *dev); +#endif +static const struct ethtool_ops netdev_ethtool_ops; + +/* helper-functions */ +static int init586(struct net_device *dev); +static int check586(struct net_device *dev, unsigned long where, unsigned size); +static void alloc586(struct net_device *dev); +static void startrecv586(struct net_device *dev); +static void *alloc_rfa(struct net_device *dev, void *ptr); +static void elmc_rcv_int(struct net_device *dev); +static void elmc_xmt_int(struct net_device *dev); +static void elmc_rnr_int(struct net_device *dev); + +struct priv { + unsigned long base; + char *memtop; + unsigned long mapped_start; /* Start of ioremap */ + volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first; + volatile struct scp_struct *scp; /* volatile is important */ + volatile struct iscp_struct *iscp; /* volatile is important */ + volatile struct scb_struct *scb; /* volatile is important */ + volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS]; +#if (NUM_XMIT_BUFFS == 1) + volatile struct transmit_cmd_struct *xmit_cmds[2]; + volatile struct nop_cmd_struct *nop_cmds[2]; +#else + volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; + volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS]; +#endif + volatile int nop_point, num_recv_buffs; + volatile char *xmit_cbuffs[NUM_XMIT_BUFFS]; + volatile int xmit_count, xmit_last; + volatile int slot; +}; + +#define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);} +#define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);} + +/* with interrupts disabled - this will clear the interrupt bit in the + 3c523 control register, and won't put it back. This effectively + disables interrupts on the card. */ +#define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);} +#define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);} + +/*************************************************************************/ +/* + Do a Channel Attention on the 3c523. This is extremely board dependent. + */ +static void elmc_do_attn586(int ioaddr, int ints) +{ + /* the 3c523 requires a minimum of 500 ns. The delays here might be + a little too large, and hence they may cut the performance of the + card slightly. If someone who knows a little more about Linux + timing would care to play with these, I'd appreciate it. */ + + /* this bit masking stuff is crap. I'd rather have separate + registers with strobe triggers for each of these functions. <sigh> + Ya take what ya got. */ + + outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL); + DELAY_16(); /* > 500 ns */ + outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL); +} + +/*************************************************************************/ +/* + Reset the 82586 on the 3c523. Also very board dependent. + */ +static void elmc_do_reset586(int ioaddr, int ints) +{ + /* toggle the RST bit low then high */ + outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL); + DELAY_16(); /* > 500 ns */ + outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL); + + elmc_do_attn586(ioaddr, ints); +} + +/********************************************** + * close device + */ + +static int elmc_close(struct net_device *dev) +{ + netif_stop_queue(dev); + elmc_id_reset586(); /* the hard way to stop the receiver */ + free_irq(dev->irq, dev); + return 0; +} + +/********************************************** + * open device + */ + +static int elmc_open(struct net_device *dev) +{ + int ret; + + elmc_id_attn586(); /* disable interrupts */ + + ret = request_irq(dev->irq, elmc_interrupt, IRQF_SHARED, + dev->name, dev); + if (ret) { + pr_err("%s: couldn't get irq %d\n", dev->name, dev->irq); + elmc_id_reset586(); + return ret; + } + alloc586(dev); + init586(dev); + startrecv586(dev); + netif_start_queue(dev); + return 0; /* most done by init */ +} + +/********************************************** + * Check to see if there's an 82586 out there. + */ + +static int __init check586(struct net_device *dev, unsigned long where, unsigned size) +{ + struct priv *p = netdev_priv(dev); + char *iscp_addrs[2]; + int i = 0; + + p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000; + p->memtop = isa_bus_to_virt((unsigned long)where) + size; + p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS); + memset((char *) p->scp, 0, sizeof(struct scp_struct)); + p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */ + + iscp_addrs[0] = isa_bus_to_virt((unsigned long)where); + iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct); + + for (i = 0; i < 2; i++) { + p->iscp = (struct iscp_struct *) iscp_addrs[i]; + memset((char *) p->iscp, 0, sizeof(struct iscp_struct)); + + p->scp->iscp = make24(p->iscp); + p->iscp->busy = 1; + + elmc_id_reset586(); + + /* reset586 does an implicit CA */ + + /* apparently, you sometimes have to kick the 82586 twice... */ + elmc_id_attn586(); + DELAY(1); + + if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */ + return 0; + } + } + return 1; +} + +/****************************************************************** + * set iscp at the right place, called by elmc_probe and open586. + */ + +static void alloc586(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + elmc_id_reset586(); + DELAY(2); + + p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS); + p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start); + p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct)); + + memset((char *) p->iscp, 0, sizeof(struct iscp_struct)); + memset((char *) p->scp, 0, sizeof(struct scp_struct)); + + p->scp->iscp = make24(p->iscp); + p->scp->sysbus = SYSBUSVAL; + p->iscp->scb_offset = make16(p->scb); + + p->iscp->busy = 1; + elmc_id_reset586(); + elmc_id_attn586(); + + DELAY(2); + + if (p->iscp->busy) + pr_err("%s: Init-Problems (alloc).\n", dev->name); + + memset((char *) p->scb, 0, sizeof(struct scb_struct)); +} + +/*****************************************************************/ + +static int elmc_getinfo(char *buf, int slot, void *d) +{ + int len = 0; + struct net_device *dev = d; + + if (dev == NULL) + return len; + + len += sprintf(buf + len, "Revision: 0x%x\n", + inb(dev->base_addr + ELMC_REVISION) & 0xf); + len += sprintf(buf + len, "IRQ: %d\n", dev->irq); + len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr, + dev->base_addr + ELMC_IO_EXTENT); + len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start, + dev->mem_end - 1); + len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ? + "External" : "Internal"); + len += sprintf(buf + len, "Device: %s\n", dev->name); + len += sprintf(buf + len, "Hardware Address: %pM\n", + dev->dev_addr); + + return len; +} /* elmc_getinfo() */ + +static const struct net_device_ops netdev_ops = { + .ndo_open = elmc_open, + .ndo_stop = elmc_close, + .ndo_get_stats = elmc_get_stats, + .ndo_start_xmit = elmc_send_packet, + .ndo_tx_timeout = elmc_timeout, +#ifdef ELMC_MULTICAST + .ndo_set_multicast_list = set_multicast_list, +#endif + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +/*****************************************************************/ + +static int __init do_elmc_probe(struct net_device *dev) +{ + static int slot; + int base_addr = dev->base_addr; + int irq = dev->irq; + u_char status = 0; + u_char revision = 0; + int i = 0; + unsigned int size = 0; + int retval; + struct priv *pr = netdev_priv(dev); + + if (MCA_bus == 0) { + return -ENODEV; + } + /* search through the slots for the 3c523. */ + slot = mca_find_adapter(ELMC_MCA_ID, 0); + while (slot != -1) { + status = mca_read_stored_pos(slot, 2); + + dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6]; + dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1]; + + /* + If we're trying to match a specified irq or IO address, + we'll reject a match unless it's what we're looking for. + Also reject it if the card is already in use. + */ + + if ((irq && irq != dev->irq) || + (base_addr && base_addr != dev->base_addr)) { + slot = mca_find_adapter(ELMC_MCA_ID, slot + 1); + continue; + } + if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) { + slot = mca_find_adapter(ELMC_MCA_ID, slot + 1); + continue; + } + + /* found what we're looking for... */ + break; + } + + /* we didn't find any 3c523 in the slots we checked for */ + if (slot == MCA_NOTFOUND) + return (base_addr || irq) ? -ENXIO : -ENODEV; + + mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC"); + mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev); + + /* if we get this far, adapter has been found - carry on */ + pr_info("%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1); + + /* Now we extract configuration info from the card. + The 3c523 provides information in two of the POS registers, but + the second one is only needed if we want to tell the card what IRQ + to use. I suspect that whoever sets the thing up initially would + prefer we don't screw with those things. + + Note that we read the status info when we found the card... + + See 3c523.h for more details. + */ + + /* revision is stored in the first 4 bits of the revision register */ + revision = inb(dev->base_addr + ELMC_REVISION) & 0xf; + + /* according to docs, we read the interrupt and write it back to + the IRQ select register, since the POST might not configure the IRQ + properly. */ + switch (dev->irq) { + case 3: + mca_write_pos(slot, 3, 0x04); + break; + case 7: + mca_write_pos(slot, 3, 0x02); + break; + case 9: + mca_write_pos(slot, 3, 0x08); + break; + case 12: + mca_write_pos(slot, 3, 0x01); + break; + } + + pr->slot = slot; + + pr_info("%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision, + dev->base_addr); + + /* Determine if we're using the on-board transceiver (i.e. coax) or + an external one. The information is pretty much useless, but I + guess it's worth brownie points. */ + dev->if_port = (status & ELMC_STATUS_DISABLE_THIN); + + /* The 3c523 has a 24K chunk of memory. The first 16K is the + shared memory, while the last 8K is for the EtherStart BIOS ROM. + Which we don't care much about here. We'll just tell Linux that + we're using 16K. MCA won't permit address space conflicts caused + by not mapping the other 8K. */ + dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3]; + + /* We're using MCA, so it's a given that the information about memory + size is correct. The Crynwr drivers do something like this. */ + + elmc_id_reset586(); /* seems like a good idea before checking it... */ + + size = 0x4000; /* check for 16K mem */ + if (!check586(dev, dev->mem_start, size)) { + pr_err("%s: memprobe, Can't find memory at 0x%lx!\n", dev->name, + dev->mem_start); + retval = -ENODEV; + goto err_out; + } + dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */ + + pr->memtop = isa_bus_to_virt(dev->mem_start) + size; + pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000; + alloc586(dev); + + elmc_id_reset586(); /* make sure it doesn't generate spurious ints */ + + /* set number of receive-buffs according to memsize */ + pr->num_recv_buffs = NUM_RECV_BUFFS_16; + + /* dump all the assorted information */ + pr_info("%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name, + dev->irq, dev->if_port ? "ex" : "in", + dev->mem_start, dev->mem_end - 1); + + /* The hardware address for the 3c523 is stored in the first six + bytes of the IO address. */ + for (i = 0; i < 6; i++) + dev->dev_addr[i] = inb(dev->base_addr + i); + + pr_info("%s: hardware address %pM\n", + dev->name, dev->dev_addr); + + dev->netdev_ops = &netdev_ops; + dev->watchdog_timeo = HZ; + dev->ethtool_ops = &netdev_ethtool_ops; + + /* note that we haven't actually requested the IRQ from the kernel. + That gets done in elmc_open(). I'm not sure that's such a good idea, + but it works, so I'll go with it. */ + +#ifndef ELMC_MULTICAST + dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */ +#endif + + retval = register_netdev(dev); + if (retval) + goto err_out; + + return 0; +err_out: + mca_set_adapter_procfn(slot, NULL, NULL); + release_region(dev->base_addr, ELMC_IO_EXTENT); + return retval; +} + +#ifdef MODULE +static void cleanup_card(struct net_device *dev) +{ + mca_set_adapter_procfn(((struct priv *)netdev_priv(dev))->slot, + NULL, NULL); + release_region(dev->base_addr, ELMC_IO_EXTENT); +} +#else +struct net_device * __init elmc_probe(int unit) +{ + struct net_device *dev = alloc_etherdev(sizeof(struct priv)); + int err; + + if (!dev) + return ERR_PTR(-ENOMEM); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + err = do_elmc_probe(dev); + if (err) + goto out; + return dev; +out: + free_netdev(dev); + return ERR_PTR(err); +} +#endif + +/********************************************** + * init the chip (elmc-interrupt should be disabled?!) + * needs a correct 'allocated' memory + */ + +static int init586(struct net_device *dev) +{ + void *ptr; + unsigned long s; + int i, result = 0; + struct priv *p = netdev_priv(dev); + volatile struct configure_cmd_struct *cfg_cmd; + volatile struct iasetup_cmd_struct *ias_cmd; + volatile struct tdr_cmd_struct *tdr_cmd; + volatile struct mcsetup_cmd_struct *mc_cmd; + struct netdev_hw_addr *ha; + int num_addrs = netdev_mc_count(dev); + + ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct)); + + cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */ + cfg_cmd->cmd_status = 0; + cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST; + cfg_cmd->cmd_link = 0xffff; + + cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */ + cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */ + cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */ + cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */ + cfg_cmd->priority = 0x00; + cfg_cmd->ifs = 0x60; + cfg_cmd->time_low = 0x00; + cfg_cmd->time_high = 0xf2; + cfg_cmd->promisc = 0; + if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) + cfg_cmd->promisc = 1; + cfg_cmd->carr_coll = 0x00; + + p->scb->cbl_offset = make16(cfg_cmd); + + p->scb->cmd = CUC_START; /* cmd.-unit start */ + elmc_id_attn586(); + + s = jiffies; /* warning: only active with interrupts on !! */ + while (!(cfg_cmd->cmd_status & STAT_COMPL)) { + if (time_after(jiffies, s + 30*HZ/100)) + break; + } + + if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) { + pr_warning("%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status); + return 1; + } + /* + * individual address setup + */ + ias_cmd = (struct iasetup_cmd_struct *) ptr; + + ias_cmd->cmd_status = 0; + ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST; + ias_cmd->cmd_link = 0xffff; + + memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN); + + p->scb->cbl_offset = make16(ias_cmd); + + p->scb->cmd = CUC_START; /* cmd.-unit start */ + elmc_id_attn586(); + + s = jiffies; + while (!(ias_cmd->cmd_status & STAT_COMPL)) { + if (time_after(jiffies, s + 30*HZ/100)) + break; + } + + if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) { + pr_warning("%s (elmc): individual address setup command failed: %04x\n", + dev->name, ias_cmd->cmd_status); + return 1; + } + /* + * TDR, wire check .. e.g. no resistor e.t.c + */ + tdr_cmd = (struct tdr_cmd_struct *) ptr; + + tdr_cmd->cmd_status = 0; + tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST; + tdr_cmd->cmd_link = 0xffff; + tdr_cmd->status = 0; + + p->scb->cbl_offset = make16(tdr_cmd); + + p->scb->cmd = CUC_START; /* cmd.-unit start */ + elmc_attn586(); + + s = jiffies; + while (!(tdr_cmd->cmd_status & STAT_COMPL)) { + if (time_after(jiffies, s + 30*HZ/100)) { + pr_warning("%s: %d Problems while running the TDR.\n", dev->name, __LINE__); + result = 1; + break; + } + } + + if (!result) { + DELAY(2); /* wait for result */ + result = tdr_cmd->status; + + p->scb->cmd = p->scb->status & STAT_MASK; + elmc_id_attn586(); /* ack the interrupts */ + + if (result & TDR_LNK_OK) { + /* empty */ + } else if (result & TDR_XCVR_PRB) { + pr_warning("%s: TDR: Transceiver problem!\n", dev->name); + } else if (result & TDR_ET_OPN) { + pr_warning("%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK); + } else if (result & TDR_ET_SRT) { + if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */ + pr_warning("%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK); + } else { + pr_warning("%s: TDR: Unknown status %04x\n", dev->name, result); + } + } + /* + * ack interrupts + */ + p->scb->cmd = p->scb->status & STAT_MASK; + elmc_id_attn586(); + + /* + * alloc nop/xmit-cmds + */ +#if (NUM_XMIT_BUFFS == 1) + for (i = 0; i < 2; i++) { + p->nop_cmds[i] = (struct nop_cmd_struct *) ptr; + p->nop_cmds[i]->cmd_cmd = CMD_NOP; + p->nop_cmds[i]->cmd_status = 0; + p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); + ptr = (char *) ptr + sizeof(struct nop_cmd_struct); + } + p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */ + ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); +#else + for (i = 0; i < NUM_XMIT_BUFFS; i++) { + p->nop_cmds[i] = (struct nop_cmd_struct *) ptr; + p->nop_cmds[i]->cmd_cmd = CMD_NOP; + p->nop_cmds[i]->cmd_status = 0; + p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); + ptr = (char *) ptr + sizeof(struct nop_cmd_struct); + p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */ + ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); + } +#endif + + ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */ + + /* + * Multicast setup + */ + + if (num_addrs) { + /* I don't understand this: do we really need memory after the init? */ + int len = ((char *) p->iscp - (char *) ptr - 8) / 6; + if (len <= 0) { + pr_err("%s: Ooooops, no memory for MC-Setup!\n", dev->name); + } else { + if (len < num_addrs) { + num_addrs = len; + pr_warning("%s: Sorry, can only apply %d MC-Address(es).\n", + dev->name, num_addrs); + } + mc_cmd = (struct mcsetup_cmd_struct *) ptr; + mc_cmd->cmd_status = 0; + mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST; + mc_cmd->cmd_link = 0xffff; + mc_cmd->mc_cnt = num_addrs * 6; + i = 0; + netdev_for_each_mc_addr(ha, dev) + memcpy((char *) mc_cmd->mc_list[i++], + ha->addr, 6); + p->scb->cbl_offset = make16(mc_cmd); + p->scb->cmd = CUC_START; + elmc_id_attn586(); + s = jiffies; + while (!(mc_cmd->cmd_status & STAT_COMPL)) { + if (time_after(jiffies, s + 30*HZ/100)) + break; + } + if (!(mc_cmd->cmd_status & STAT_COMPL)) { + pr_warning("%s: Can't apply multicast-address-list.\n", dev->name); + } + } + } + /* + * alloc xmit-buffs / init xmit_cmds + */ + for (i = 0; i < NUM_XMIT_BUFFS; i++) { + p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */ + ptr = (char *) ptr + XMIT_BUFF_SIZE; + p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */ + ptr = (char *) ptr + sizeof(struct tbd_struct); + if ((void *) ptr > (void *) p->iscp) { + pr_err("%s: not enough shared-mem for your configuration!\n", dev->name); + return 1; + } + memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct)); + memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct)); + p->xmit_cmds[i]->cmd_status = STAT_COMPL; + p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT; + p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i])); + p->xmit_buffs[i]->next = 0xffff; + p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i])); + } + + p->xmit_count = 0; + p->xmit_last = 0; +#ifndef NO_NOPCOMMANDS + p->nop_point = 0; +#endif + + /* + * 'start transmitter' (nop-loop) + */ +#ifndef NO_NOPCOMMANDS + p->scb->cbl_offset = make16(p->nop_cmds[0]); + p->scb->cmd = CUC_START; + elmc_id_attn586(); + WAIT_4_SCB_CMD(); +#else + p->xmit_cmds[0]->cmd_link = 0xffff; + p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT; +#endif + + return 0; +} + +/****************************************************** + * This is a helper routine for elmc_rnr_int() and init586(). + * It sets up the Receive Frame Area (RFA). + */ + +static void *alloc_rfa(struct net_device *dev, void *ptr) +{ + volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr; + volatile struct rbd_struct *rbd; + int i; + struct priv *p = netdev_priv(dev); + + memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs); + p->rfd_first = rfd; + + for (i = 0; i < p->num_recv_buffs; i++) { + rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs); + } + rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */ + + ptr = (void *) (rfd + p->num_recv_buffs); + + rbd = (struct rbd_struct *) ptr; + ptr = (void *) (rbd + p->num_recv_buffs); + + /* clr descriptors */ + memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs); + + for (i = 0; i < p->num_recv_buffs; i++) { + rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs)); + rbd[i].size = RECV_BUFF_SIZE; + rbd[i].buffer = make24(ptr); + ptr = (char *) ptr + RECV_BUFF_SIZE; + } + + p->rfd_top = p->rfd_first; + p->rfd_last = p->rfd_first + p->num_recv_buffs - 1; + + p->scb->rfa_offset = make16(p->rfd_first); + p->rfd_first->rbd_offset = make16(rbd); + + return ptr; +} + + +/************************************************** + * Interrupt Handler ... + */ + +static irqreturn_t +elmc_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + unsigned short stat; + struct priv *p; + + if (!netif_running(dev)) { + /* The 3c523 has this habit of generating interrupts during the + reset. I'm not sure if the ni52 has this same problem, but it's + really annoying if we haven't finished initializing it. I was + hoping all the elmc_id_* commands would disable this, but I + might have missed a few. */ + + elmc_id_attn586(); /* ack inter. and disable any more */ + return IRQ_HANDLED; + } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) { + /* wasn't this device */ + return IRQ_NONE; + } + /* reading ELMC_CTRL also clears the INT bit. */ + + p = netdev_priv(dev); + + while ((stat = p->scb->status & STAT_MASK)) + { + p->scb->cmd = stat; + elmc_attn586(); /* ack inter. */ + + if (stat & STAT_CX) { + /* command with I-bit set complete */ + elmc_xmt_int(dev); + } + if (stat & STAT_FR) { + /* received a frame */ + elmc_rcv_int(dev); + } +#ifndef NO_NOPCOMMANDS + if (stat & STAT_CNA) { + /* CU went 'not ready' */ + if (netif_running(dev)) { + pr_warning("%s: oops! CU has left active state. stat: %04x/%04x.\n", + dev->name, (int) stat, (int) p->scb->status); + } + } +#endif + + if (stat & STAT_RNR) { + /* RU went 'not ready' */ + + if (p->scb->status & RU_SUSPEND) { + /* special case: RU_SUSPEND */ + + WAIT_4_SCB_CMD(); + p->scb->cmd = RUC_RESUME; + elmc_attn586(); + } else { + pr_warning("%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", + dev->name, (int) stat, (int) p->scb->status); + elmc_rnr_int(dev); + } + } + WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */ + if (p->scb->cmd) { /* timed out? */ + break; + } + } + return IRQ_HANDLED; +} + +/******************************************************* + * receive-interrupt + */ + +static void elmc_rcv_int(struct net_device *dev) +{ + int status; + unsigned short totlen; + struct sk_buff *skb; + struct rbd_struct *rbd; + struct priv *p = netdev_priv(dev); + + for (; (status = p->rfd_top->status) & STAT_COMPL;) { + rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset); + + if (status & STAT_OK) { /* frame received without error? */ + if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */ + totlen &= RBD_MASK; /* length of this frame */ + rbd->status = 0; + skb = (struct sk_buff *) dev_alloc_skb(totlen + 2); + if (skb != NULL) { + skb_reserve(skb, 2); /* 16 byte alignment */ + skb_put(skb,totlen); + skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) 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 { + pr_warning("%s: received oversized frame.\n", dev->name); + dev->stats.rx_dropped++; + } + } else { /* frame !(ok), only with 'save-bad-frames' */ + pr_warning("%s: oops! rfd-error-status: %04x\n", dev->name, status); + dev->stats.rx_errors++; + } + p->rfd_top->status = 0; + p->rfd_top->last = RFD_SUSP; + p->rfd_last->last = 0; /* delete RU_SUSP */ + p->rfd_last = p->rfd_top; + p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */ + } +} + +/********************************************************** + * handle 'Receiver went not ready'. + */ + +static void elmc_rnr_int(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + dev->stats.rx_errors++; + + WAIT_4_SCB_CMD(); /* wait for the last cmd */ + p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */ + elmc_attn586(); + WAIT_4_SCB_CMD(); /* wait for accept cmd. */ + + alloc_rfa(dev, (char *) p->rfd_first); + startrecv586(dev); /* restart RU */ + + pr_warning("%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status); + +} + +/********************************************************** + * handle xmit - interrupt + */ + +static void elmc_xmt_int(struct net_device *dev) +{ + int status; + struct priv *p = netdev_priv(dev); + + status = p->xmit_cmds[p->xmit_last]->cmd_status; + if (!(status & STAT_COMPL)) { + pr_warning("%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) { + pr_warning("%s: late collision detected.\n", dev->name); + dev->stats.collisions++; + } else if (status & TCMD_NOCARRIER) { + dev->stats.tx_carrier_errors++; + pr_warning("%s: no carrier detected.\n", dev->name); + } else if (status & TCMD_LOSTCTS) { + pr_warning("%s: loss of CTS detected.\n", dev->name); + } else if (status & TCMD_UNDERRUN) { + dev->stats.tx_fifo_errors++; + pr_warning("%s: DMA underrun detected.\n", dev->name); + } else if (status & TCMD_MAXCOLL) { + pr_warning("%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); + + p->scb->rfa_offset = make16(p->rfd_first); + p->scb->cmd = RUC_START; + elmc_attn586(); /* start cmd. */ + WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */ +} + +/****************************************************** + * timeout + */ + +static void elmc_timeout(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + /* COMMAND-UNIT active? */ + if (p->scb->status & CU_ACTIVE) { + pr_debug("%s: strange ... timeout with CU active?!?\n", dev->name); + pr_debug("%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name, + (int)p->xmit_cmds[0]->cmd_status, + (int)p->nop_cmds[0]->cmd_status, + (int)p->nop_cmds[1]->cmd_status, (int)p->nop_point); + p->scb->cmd = CUC_ABORT; + elmc_attn586(); + WAIT_4_SCB_CMD(); + p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]); + p->scb->cmd = CUC_START; + elmc_attn586(); + WAIT_4_SCB_CMD(); + netif_wake_queue(dev); + } else { + pr_debug("%s: xmitter timed out, try to restart! stat: %04x\n", + dev->name, p->scb->status); + pr_debug("%s: command-stats: %04x %04x\n", dev->name, + p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status); + elmc_close(dev); + elmc_open(dev); + } +} + +/****************************************************** + * send frame + */ + +static netdev_tx_t elmc_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + int len; + int i; +#ifndef NO_NOPCOMMANDS + int next_nop; +#endif + struct priv *p = netdev_priv(dev); + + netif_stop_queue(dev); + + len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN; + + if (len != skb->len) + memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN); + skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len); + +#if (NUM_XMIT_BUFFS == 1) +#ifdef NO_NOPCOMMANDS + p->xmit_buffs[0]->size = TBD_LAST | len; + for (i = 0; i < 16; i++) { + p->scb->cbl_offset = make16(p->xmit_cmds[0]); + p->scb->cmd = CUC_START; + p->xmit_cmds[0]->cmd_status = 0; + elmc_attn586(); + if (!i) { + dev_kfree_skb(skb); + } + WAIT_4_SCB_CMD(); + if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */ + break; + } + if (p->xmit_cmds[0]->cmd_status) { + break; + } + if (i == 15) { + pr_warning("%s: Can't start transmit-command.\n", dev->name); + } + } +#else + next_nop = (p->nop_point + 1) & 0x1; + p->xmit_buffs[0]->size = TBD_LAST | len; + + p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link + = make16((p->nop_cmds[next_nop])); + p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0; + + p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0])); + p->nop_point = next_nop; + dev_kfree_skb(skb); +#endif +#else + p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len; + if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) { + next_nop = 0; + } + p->xmit_cmds[p->xmit_count]->cmd_status = 0; + p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link + = make16((p->nop_cmds[next_nop])); + p->nop_cmds[next_nop]->cmd_status = 0; + p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count])); + p->xmit_count = next_nop; + if (p->xmit_count != p->xmit_last) + netif_wake_queue(dev); + dev_kfree_skb(skb); +#endif + return NETDEV_TX_OK; +} + +/******************************************* + * Someone wanna have the statistics + */ + +static struct net_device_stats *elmc_get_stats(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + unsigned short crc, aln, rsc, ovrn; + + crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */ + p->scb->crc_errs -= crc; + aln = p->scb->aln_errs; + p->scb->aln_errs -= aln; + rsc = p->scb->rsc_errs; + p->scb->rsc_errs -= rsc; + ovrn = p->scb->ovrn_errs; + p->scb->ovrn_errs -= ovrn; + + 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 .. + */ + +#ifdef ELMC_MULTICAST +static void set_multicast_list(struct net_device *dev) +{ + if (!dev->start) { + /* without a running interface, promiscuous doesn't work */ + return; + } + dev->start = 0; + alloc586(dev); + init586(dev); + startrecv586(dev); + dev->start = 1; +} +#endif + +static void netdev_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr); +} + +static const struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, +}; + +#ifdef MODULE + +/* Increase if needed ;) */ +#define MAX_3C523_CARDS 4 + +static struct net_device *dev_elmc[MAX_3C523_CARDS]; +static int irq[MAX_3C523_CARDS]; +static int io[MAX_3C523_CARDS]; +module_param_array(irq, int, NULL, 0); +module_param_array(io, int, NULL, 0); +MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)"); +MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)"); +MODULE_LICENSE("GPL"); + +int __init init_module(void) +{ + int this_dev,found = 0; + + /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */ + for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) { + struct net_device *dev = alloc_etherdev(sizeof(struct priv)); + if (!dev) + break; + dev->irq=irq[this_dev]; + dev->base_addr=io[this_dev]; + if (do_elmc_probe(dev) == 0) { + dev_elmc[this_dev] = dev; + found++; + continue; + } + free_netdev(dev); + if (io[this_dev]==0) + break; + pr_warning("3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]); + } + + if(found==0) { + if (io[0]==0) + pr_notice("3c523.c: No 3c523 cards found\n"); + return -ENXIO; + } else return 0; +} + +void __exit cleanup_module(void) +{ + int this_dev; + for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) { + struct net_device *dev = dev_elmc[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} + +#endif /* MODULE */ |
