diff options
Diffstat (limited to 'drivers/net/ni65.c')
| -rw-r--r-- | drivers/net/ni65.c | 1277 |
1 files changed, 1277 insertions, 0 deletions
diff --git a/drivers/net/ni65.c b/drivers/net/ni65.c new file mode 100644 index 0000000..925d1df --- /dev/null +++ b/drivers/net/ni65.c @@ -0,0 +1,1277 @@ +/* + * ni6510 (am7990 'lance' chip) driver for Linux-net-3 + * BETAcode v0.71 (96/09/29) for 2.0.0 (or later) + * copyrights (c) 1994,1995,1996 by M.Hipp + * + * This driver can handle the old ni6510 board and the newer ni6510 + * EtherBlaster. (probably it also works with every full NE2100 + * compatible card) + * + * To compile as module, type: + * gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni65.c + * driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7 + * + * This is an extension to the Linux operating system, and is covered by the + * same GNU General Public License that covers the Linux-kernel. + * + * comments/bugs/suggestions can be sent to: + * Michael Hipp + * email: hippm@informatik.uni-tuebingen.de + * + * sources: + * some things are from the 'ni6510-packet-driver for dos by Russ Nelson' + * and from the original drivers by D.Becker + * + * known problems: + * - on some PCI boards (including my own) the card/board/ISA-bridge has + * problems with bus master DMA. This results in lotsa overruns. + * It may help to '#define RCV_PARANOIA_CHECK' or try to #undef + * the XMT and RCV_VIA_SKB option .. this reduces driver performance. + * Or just play with your BIOS options to optimize ISA-DMA access. + * Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE + * defines -> please report me your experience then + * - Harald reported for ASUS SP3G mainboards, that you should use + * the 'optimal settings' from the user's manual on page 3-12! + * + * credits: + * thanx to Jason Sullivan for sending me a ni6510 card! + * lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig + * + * simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB) + * average: FTP -> 8384421 bytes received in 8.5 seconds + * (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS) + * peak: FTP -> 8384421 bytes received in 7.5 seconds + * (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS) + */ + +/* + * 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK) + * 96.Sept.29: virt_to_bus stuff added for new memory modell + * 96.April.29: Added Harald Koenig's Patches (MH) + * 96.April.13: enhanced error handling .. more tests (MH) + * 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH) + * 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH) + * 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH) + * hopefully no more 16MB limit + * + * 95.Nov.18: multicast tweaked (AC). + * + * 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH) + * + * 94.July.16: fixed bugs in recv_skb and skb-alloc stuff (MH) + */ + +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/module.h> +#include <linux/bitops.h> + +#include <asm/io.h> +#include <asm/dma.h> + +#include "ni65.h" + +/* + * the current setting allows an acceptable performance + * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in + * the header of this file + * 'invert' the defines for max. performance. This may cause DMA problems + * on some boards (e.g on my ASUS SP3G) + */ +#undef XMT_VIA_SKB +#undef RCV_VIA_SKB +#define RCV_PARANOIA_CHECK + +#define MID_PERFORMANCE + +#if defined( LOW_PERFORMANCE ) + static int isa0=7,isa1=7,csr80=0x0c10; +#elif defined( MID_PERFORMANCE ) + static int isa0=5,isa1=5,csr80=0x2810; +#else /* high performance */ + static int isa0=4,isa1=4,csr80=0x0017; +#endif + +/* + * a few card/vendor specific defines + */ +#define NI65_ID0 0x00 +#define NI65_ID1 0x55 +#define NI65_EB_ID0 0x52 +#define NI65_EB_ID1 0x44 +#define NE2100_ID0 0x57 +#define NE2100_ID1 0x57 + +#define PORT p->cmdr_addr + +/* + * buffer configuration + */ +#if 1 +#define RMDNUM 16 +#define RMDNUMMASK 0x80000000 +#else +#define RMDNUM 8 +#define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */ +#endif + +#if 0 +#define TMDNUM 1 +#define TMDNUMMASK 0x00000000 +#else +#define TMDNUM 4 +#define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */ +#endif + +/* slightly oversized */ +#define R_BUF_SIZE 1544 +#define T_BUF_SIZE 1544 + +/* + * lance register defines + */ +#define L_DATAREG 0x00 +#define L_ADDRREG 0x02 +#define L_RESET 0x04 +#define L_CONFIG 0x05 +#define L_BUSIF 0x06 + +/* + * to access the lance/am7990-regs, you have to write + * reg-number into L_ADDRREG, then you can access it using L_DATAREG + */ +#define CSR0 0x00 +#define CSR1 0x01 +#define CSR2 0x02 +#define CSR3 0x03 + +#define INIT_RING_BEFORE_START 0x1 +#define FULL_RESET_ON_ERROR 0x2 + +#if 0 +#define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \ + outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);} +#define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\ + inw(PORT+L_DATAREG)) +#if 0 +#define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);} +#else +#define writedatareg(val) { writereg(val,CSR0); } +#endif +#else +#define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);} +#define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG)) +#define writedatareg(val) { writereg(val,CSR0); } +#endif + +static unsigned char ni_vendor[] = { 0x02,0x07,0x01 }; + +static struct card { + unsigned char id0,id1; + short id_offset; + short total_size; + short cmd_offset; + short addr_offset; + unsigned char *vendor_id; + char *cardname; + long config; +} cards[] = { + { + .id0 = NI65_ID0, + .id1 = NI65_ID1, + .id_offset = 0x0e, + .total_size = 0x10, + .cmd_offset = 0x0, + .addr_offset = 0x8, + .vendor_id = ni_vendor, + .cardname = "ni6510", + .config = 0x1, + }, + { + .id0 = NI65_EB_ID0, + .id1 = NI65_EB_ID1, + .id_offset = 0x0e, + .total_size = 0x18, + .cmd_offset = 0x10, + .addr_offset = 0x0, + .vendor_id = ni_vendor, + .cardname = "ni6510 EtherBlaster", + .config = 0x2, + }, + { + .id0 = NE2100_ID0, + .id1 = NE2100_ID1, + .id_offset = 0x0e, + .total_size = 0x18, + .cmd_offset = 0x10, + .addr_offset = 0x0, + .vendor_id = NULL, + .cardname = "generic NE2100", + .config = 0x0, + }, +}; +#define NUM_CARDS 3 + +struct priv +{ + struct rmd rmdhead[RMDNUM]; + struct tmd tmdhead[TMDNUM]; + struct init_block ib; + int rmdnum; + int tmdnum,tmdlast; +#ifdef RCV_VIA_SKB + struct sk_buff *recv_skb[RMDNUM]; +#else + void *recvbounce[RMDNUM]; +#endif +#ifdef XMT_VIA_SKB + struct sk_buff *tmd_skb[TMDNUM]; +#endif + void *tmdbounce[TMDNUM]; + int tmdbouncenum; + int lock,xmit_queued; + struct net_device_stats stats; + void *self; + int cmdr_addr; + int cardno; + int features; + spinlock_t ring_lock; +}; + +static int ni65_probe1(struct net_device *dev,int); +static irqreturn_t ni65_interrupt(int irq, void * dev_id, struct pt_regs *regs); +static void ni65_recv_intr(struct net_device *dev,int); +static void ni65_xmit_intr(struct net_device *dev,int); +static int ni65_open(struct net_device *dev); +static int ni65_lance_reinit(struct net_device *dev); +static void ni65_init_lance(struct priv *p,unsigned char*,int,int); +static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev); +static void ni65_timeout(struct net_device *dev); +static int ni65_close(struct net_device *dev); +static int ni65_alloc_buffer(struct net_device *dev); +static void ni65_free_buffer(struct priv *p); +static struct net_device_stats *ni65_get_stats(struct net_device *); +static void set_multicast_list(struct net_device *dev); + +static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */ +static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */ + +static int debuglevel = 1; + +/* + * set 'performance' registers .. we must STOP lance for that + */ +static void ni65_set_performance(struct priv *p) +{ + writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */ + + if( !(cards[p->cardno].config & 0x02) ) + return; + + outw(80,PORT+L_ADDRREG); + if(inw(PORT+L_ADDRREG) != 80) + return; + + writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */ + outw(0,PORT+L_ADDRREG); + outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */ + outw(1,PORT+L_ADDRREG); + outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns */ + + outw(CSR0,PORT+L_ADDRREG); /* switch back to CSR0 */ +} + +/* + * open interface (up) + */ +static int ni65_open(struct net_device *dev) +{ + struct priv *p = (struct priv *) dev->priv; + int irqval = request_irq(dev->irq, &ni65_interrupt,0, + cards[p->cardno].cardname,dev); + if (irqval) { + printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n", + dev->name,dev->irq, irqval); + return -EAGAIN; + } + + if(ni65_lance_reinit(dev)) + { + netif_start_queue(dev); + return 0; + } + else + { + free_irq(dev->irq,dev); + return -EAGAIN; + } +} + +/* + * close interface (down) + */ +static int ni65_close(struct net_device *dev) +{ + struct priv *p = (struct priv *) dev->priv; + + netif_stop_queue(dev); + + outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */ + +#ifdef XMT_VIA_SKB + { + int i; + for(i=0;i<TMDNUM;i++) + { + if(p->tmd_skb[i]) { + dev_kfree_skb(p->tmd_skb[i]); + p->tmd_skb[i] = NULL; + } + } + } +#endif + free_irq(dev->irq,dev); + return 0; +} + +static void cleanup_card(struct net_device *dev) +{ + struct priv *p = (struct priv *) dev->priv; + disable_dma(dev->dma); + free_dma(dev->dma); + release_region(dev->base_addr, cards[p->cardno].total_size); + ni65_free_buffer(p); +} + +/* set: io,irq,dma or set it when calling insmod */ +static int irq; +static int io; +static int dma; + +/* + * Probe The Card (not the lance-chip) + */ +struct net_device * __init ni65_probe(int unit) +{ + struct net_device *dev = alloc_etherdev(0); + static int ports[] = {0x360,0x300,0x320,0x340, 0}; + int *port; + int err = 0; + + if (!dev) + return ERR_PTR(-ENOMEM); + + if (unit >= 0) { + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + irq = dev->irq; + dma = dev->dma; + } else { + dev->base_addr = io; + } + + if (dev->base_addr > 0x1ff) { /* Check a single specified location. */ + err = ni65_probe1(dev, dev->base_addr); + } else if (dev->base_addr > 0) { /* Don't probe at all. */ + err = -ENXIO; + } else { + for (port = ports; *port && ni65_probe1(dev, *port); port++) + ; + if (!*port) + err = -ENODEV; + } + if (err) + goto out; + + err = register_netdev(dev); + if (err) + goto out1; + return dev; +out1: + cleanup_card(dev); +out: + free_netdev(dev); + return ERR_PTR(err); +} + +/* + * this is the real card probe .. + */ +static int __init ni65_probe1(struct net_device *dev,int ioaddr) +{ + int i,j; + struct priv *p; + unsigned long flags; + + dev->irq = irq; + dev->dma = dma; + + for(i=0;i<NUM_CARDS;i++) { + if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname)) + continue; + if(cards[i].id_offset >= 0) { + if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 || + inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) { + release_region(ioaddr, cards[i].total_size); + continue; + } + } + if(cards[i].vendor_id) { + for(j=0;j<3;j++) + if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j]) { + release_region(ioaddr, cards[i].total_size); + continue; + } + } + break; + } + if(i == NUM_CARDS) + return -ENODEV; + + for(j=0;j<6;j++) + dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j); + + if( (j=ni65_alloc_buffer(dev)) < 0) { + release_region(ioaddr, cards[i].total_size); + return j; + } + p = (struct priv *) dev->priv; + p->cmdr_addr = ioaddr + cards[i].cmd_offset; + p->cardno = i; + spin_lock_init(&p->ring_lock); + + printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr); + + outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */ + if( (j=readreg(CSR0)) != 0x4) { + printk("failed.\n"); + printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j); + ni65_free_buffer(p); + release_region(ioaddr, cards[p->cardno].total_size); + return -EAGAIN; + } + + outw(88,PORT+L_ADDRREG); + if(inw(PORT+L_ADDRREG) == 88) { + unsigned long v; + v = inw(PORT+L_DATAREG); + v <<= 16; + outw(89,PORT+L_ADDRREG); + v |= inw(PORT+L_DATAREG); + printk("Version %#08lx, ",v); + p->features = INIT_RING_BEFORE_START; + } + else { + printk("ancient LANCE, "); + p->features = 0x0; + } + + if(test_bit(0,&cards[i].config)) { + dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3]; + dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3]; + printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma); + } + else { + if(dev->dma == 0) { + /* 'stuck test' from lance.c */ + long dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) | + (inb(DMA2_STAT_REG) & 0xf0); + for(i=1;i<5;i++) { + int dma = dmatab[i]; + if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510")) + continue; + + flags=claim_dma_lock(); + disable_dma(dma); + set_dma_mode(dma,DMA_MODE_CASCADE); + enable_dma(dma); + release_dma_lock(flags); + + ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */ + + flags=claim_dma_lock(); + disable_dma(dma); + free_dma(dma); + release_dma_lock(flags); + + if(readreg(CSR0) & CSR0_IDON) + break; + } + if(i == 5) { + printk("failed.\n"); + printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name); + ni65_free_buffer(p); + release_region(ioaddr, cards[p->cardno].total_size); + return -EAGAIN; + } + dev->dma = dmatab[i]; + printk("DMA %d (autodetected), ",dev->dma); + } + else + printk("DMA %d (assigned), ",dev->dma); + + if(dev->irq < 2) + { + unsigned long irq_mask; + + ni65_init_lance(p,dev->dev_addr,0,0); + irq_mask = probe_irq_on(); + writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */ + msleep(20); + dev->irq = probe_irq_off(irq_mask); + if(!dev->irq) + { + printk("Failed to detect IRQ line!\n"); + ni65_free_buffer(p); + release_region(ioaddr, cards[p->cardno].total_size); + return -EAGAIN; + } + printk("IRQ %d (autodetected).\n",dev->irq); + } + else + printk("IRQ %d (assigned).\n",dev->irq); + } + + if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0) + { + printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma); + ni65_free_buffer(p); + release_region(ioaddr, cards[p->cardno].total_size); + return -EAGAIN; + } + + dev->base_addr = ioaddr; + SET_MODULE_OWNER(dev); + dev->open = ni65_open; + dev->stop = ni65_close; + dev->hard_start_xmit = ni65_send_packet; + dev->tx_timeout = ni65_timeout; + dev->watchdog_timeo = HZ/2; + dev->get_stats = ni65_get_stats; + dev->set_multicast_list = set_multicast_list; + return 0; /* everything is OK */ +} + +/* + * set lance register and trigger init + */ +static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode) +{ + int i; + u32 pib; + + writereg(CSR0_CLRALL|CSR0_STOP,CSR0); + + for(i=0;i<6;i++) + p->ib.eaddr[i] = daddr[i]; + + for(i=0;i<8;i++) + p->ib.filter[i] = filter; + p->ib.mode = mode; + + p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK; + p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK; + writereg(0,CSR3); /* busmaster/no word-swap */ + pib = (u32) isa_virt_to_bus(&p->ib); + writereg(pib & 0xffff,CSR1); + writereg(pib >> 16,CSR2); + + writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */ + + for(i=0;i<32;i++) + { + mdelay(4); + if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) ) + break; /* init ok ? */ + } +} + +/* + * allocate memory area and check the 16MB border + */ +static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type) +{ + struct sk_buff *skb=NULL; + unsigned char *ptr; + void *ret; + + if(type) { + ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA); + if(!skb) { + printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what); + return NULL; + } + skb->dev = dev; + skb_reserve(skb,2+16); + skb_put(skb,R_BUF_SIZE); /* grab the whole space .. (not necessary) */ + ptr = skb->data; + } + else { + ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA); + if(!ret) { + printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what); + return NULL; + } + } + if( (u32) virt_to_phys(ptr+size) > 0x1000000) { + printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what); + if(type) + kfree_skb(skb); + else + kfree(ptr); + return NULL; + } + return ret; +} + +/* + * allocate all memory structures .. send/recv buffers etc ... + */ +static int ni65_alloc_buffer(struct net_device *dev) +{ + unsigned char *ptr; + struct priv *p; + int i; + + /* + * we need 8-aligned memory .. + */ + ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0); + if(!ptr) + return -ENOMEM; + + p = dev->priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7); + memset((char *) dev->priv,0,sizeof(struct priv)); + p->self = ptr; + + for(i=0;i<TMDNUM;i++) + { +#ifdef XMT_VIA_SKB + p->tmd_skb[i] = NULL; +#endif + p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0); + if(!p->tmdbounce[i]) { + ni65_free_buffer(p); + return -ENOMEM; + } + } + + for(i=0;i<RMDNUM;i++) + { +#ifdef RCV_VIA_SKB + p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1); + if(!p->recv_skb[i]) { + ni65_free_buffer(p); + return -ENOMEM; + } +#else + p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0); + if(!p->recvbounce[i]) { + ni65_free_buffer(p); + return -ENOMEM; + } +#endif + } + + return 0; /* everything is OK */ +} + +/* + * free buffers and private struct + */ +static void ni65_free_buffer(struct priv *p) +{ + int i; + + if(!p) + return; + + for(i=0;i<TMDNUM;i++) { + if(p->tmdbounce[i]) + kfree(p->tmdbounce[i]); +#ifdef XMT_VIA_SKB + if(p->tmd_skb[i]) + dev_kfree_skb(p->tmd_skb[i]); +#endif + } + + for(i=0;i<RMDNUM;i++) + { +#ifdef RCV_VIA_SKB + if(p->recv_skb[i]) + dev_kfree_skb(p->recv_skb[i]); +#else + if(p->recvbounce[i]) + kfree(p->recvbounce[i]); +#endif + } + if(p->self) + kfree(p->self); +} + + +/* + * stop and (re)start lance .. e.g after an error + */ +static void ni65_stop_start(struct net_device *dev,struct priv *p) +{ + int csr0 = CSR0_INEA; + + writedatareg(CSR0_STOP); + + if(debuglevel > 1) + printk(KERN_DEBUG "ni65_stop_start\n"); + + if(p->features & INIT_RING_BEFORE_START) { + int i; +#ifdef XMT_VIA_SKB + struct sk_buff *skb_save[TMDNUM]; +#endif + unsigned long buffer[TMDNUM]; + short blen[TMDNUM]; + + if(p->xmit_queued) { + while(1) { + if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN)) + break; + p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1); + if(p->tmdlast == p->tmdnum) + break; + } + } + + for(i=0;i<TMDNUM;i++) { + struct tmd *tmdp = p->tmdhead + i; +#ifdef XMT_VIA_SKB + skb_save[i] = p->tmd_skb[i]; +#endif + buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer); + blen[i] = tmdp->blen; + tmdp->u.s.status = 0x0; + } + + for(i=0;i<RMDNUM;i++) { + struct rmd *rmdp = p->rmdhead + i; + rmdp->u.s.status = RCV_OWN; + } + p->tmdnum = p->xmit_queued = 0; + writedatareg(CSR0_STRT | csr0); + + for(i=0;i<TMDNUM;i++) { + int num = (i + p->tmdlast) & (TMDNUM-1); + p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */ + p->tmdhead[i].blen = blen[num]; + if(p->tmdhead[i].u.s.status & XMIT_OWN) { + p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1); + p->xmit_queued = 1; + writedatareg(CSR0_TDMD | CSR0_INEA | csr0); + } +#ifdef XMT_VIA_SKB + p->tmd_skb[i] = skb_save[num]; +#endif + } + p->rmdnum = p->tmdlast = 0; + if(!p->lock) + if (p->tmdnum || !p->xmit_queued) + netif_wake_queue(dev); + dev->trans_start = jiffies; + } + else + writedatareg(CSR0_STRT | csr0); +} + +/* + * init lance (write init-values .. init-buffers) (open-helper) + */ +static int ni65_lance_reinit(struct net_device *dev) +{ + int i; + struct priv *p = (struct priv *) dev->priv; + unsigned long flags; + + p->lock = 0; + p->xmit_queued = 0; + + flags=claim_dma_lock(); + disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */ + set_dma_mode(dev->dma,DMA_MODE_CASCADE); + enable_dma(dev->dma); + release_dma_lock(flags); + + outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */ + if( (i=readreg(CSR0) ) != 0x4) + { + printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name, + cards[p->cardno].cardname,(int) i); + flags=claim_dma_lock(); + disable_dma(dev->dma); + release_dma_lock(flags); + return 0; + } + + p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0; + for(i=0;i<TMDNUM;i++) + { + struct tmd *tmdp = p->tmdhead + i; +#ifdef XMT_VIA_SKB + if(p->tmd_skb[i]) { + dev_kfree_skb(p->tmd_skb[i]); + p->tmd_skb[i] = NULL; + } +#endif + tmdp->u.buffer = 0x0; + tmdp->u.s.status = XMIT_START | XMIT_END; + tmdp->blen = tmdp->status2 = 0; + } + + for(i=0;i<RMDNUM;i++) + { + struct rmd *rmdp = p->rmdhead + i; +#ifdef RCV_VIA_SKB + rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data); +#else + rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]); +#endif + rmdp->blen = -(R_BUF_SIZE-8); + rmdp->mlen = 0; + rmdp->u.s.status = RCV_OWN; + } + + if(dev->flags & IFF_PROMISC) + ni65_init_lance(p,dev->dev_addr,0x00,M_PROM); + else if(dev->mc_count || dev->flags & IFF_ALLMULTI) + ni65_init_lance(p,dev->dev_addr,0xff,0x0); + else + ni65_init_lance(p,dev->dev_addr,0x00,0x00); + + /* + * ni65_set_lance_mem() sets L_ADDRREG to CSR0 + * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED + */ + + if(inw(PORT+L_DATAREG) & CSR0_IDON) { + ni65_set_performance(p); + /* init OK: start lance , enable interrupts */ + writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT); + return 1; /* ->OK */ + } + printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG)); + flags=claim_dma_lock(); + disable_dma(dev->dma); + release_dma_lock(flags); + return 0; /* ->Error */ +} + +/* + * interrupt handler + */ +static irqreturn_t ni65_interrupt(int irq, void * dev_id, struct pt_regs * regs) +{ + int csr0 = 0; + struct net_device *dev = dev_id; + struct priv *p; + int bcnt = 32; + + p = (struct priv *) dev->priv; + + spin_lock(&p->ring_lock); + + while(--bcnt) { + csr0 = inw(PORT+L_DATAREG); + +#if 0 + writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */ +#else + writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */ +#endif + + if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT))) + break; + + if(csr0 & CSR0_RINT) /* RECV-int? */ + ni65_recv_intr(dev,csr0); + if(csr0 & CSR0_TINT) /* XMIT-int? */ + ni65_xmit_intr(dev,csr0); + + if(csr0 & CSR0_ERR) + { + struct priv *p = (struct priv *) dev->priv; + if(debuglevel > 1) + printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0); + if(csr0 & CSR0_BABL) + p->stats.tx_errors++; + if(csr0 & CSR0_MISS) { + int i; + for(i=0;i<RMDNUM;i++) + printk("%02x ",p->rmdhead[i].u.s.status); + printk("\n"); + p->stats.rx_errors++; + } + if(csr0 & CSR0_MERR) { + if(debuglevel > 1) + printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0); + ni65_stop_start(dev,p); + } + } + } + +#ifdef RCV_PARANOIA_CHECK +{ + int j; + for(j=0;j<RMDNUM;j++) + { + struct priv *p = (struct priv *) dev->priv; + int i,k,num1,num2; + for(i=RMDNUM-1;i>0;i--) { + num2 = (p->rmdnum + i) & (RMDNUM-1); + if(!(p->rmdhead[num2].u.s.status & RCV_OWN)) + break; + } + + if(i) { + for(k=0;k<RMDNUM;k++) { + num1 = (p->rmdnum + k) & (RMDNUM-1); + if(!(p->rmdhead[num1].u.s.status & RCV_OWN)) + break; + } + if(!k) + break; + + if(debuglevel > 0) + { + char buf[256],*buf1; + int k; + buf1 = buf; + for(k=0;k<RMDNUM;k++) { + sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */ + buf1 += 3; + } + *buf1 = 0; + printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf); + } + + p->rmdnum = num1; + ni65_recv_intr(dev,csr0); + if((p->rmdhead[num2].u.s.status & RCV_OWN)) + break; /* ok, we are 'in sync' again */ + } + else + break; + } +} +#endif + + if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) { + printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name); + ni65_stop_start(dev,p); + } + else + writedatareg(CSR0_INEA); + + spin_unlock(&p->ring_lock); + return IRQ_HANDLED; +} + +/* + * We have received an Xmit-Interrupt .. + * send a new packet if necessary + */ +static void ni65_xmit_intr(struct net_device *dev,int csr0) +{ + struct priv *p = (struct priv *) dev->priv; + + while(p->xmit_queued) + { + struct tmd *tmdp = p->tmdhead + p->tmdlast; + int tmdstat = tmdp->u.s.status; + + if(tmdstat & XMIT_OWN) + break; + + if(tmdstat & XMIT_ERR) + { +#if 0 + if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3) + printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name); +#endif + /* checking some errors */ + if(tmdp->status2 & XMIT_RTRY) + p->stats.tx_aborted_errors++; + if(tmdp->status2 & XMIT_LCAR) + p->stats.tx_carrier_errors++; + if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) { + /* this stops the xmitter */ + p->stats.tx_fifo_errors++; + if(debuglevel > 0) + printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name); + if(p->features & INIT_RING_BEFORE_START) { + tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; /* test: resend this frame */ + ni65_stop_start(dev,p); + break; /* no more Xmit processing .. */ + } + else + ni65_stop_start(dev,p); + } + if(debuglevel > 2) + printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2); + if(!(csr0 & CSR0_BABL)) /* don't count errors twice */ + p->stats.tx_errors++; + tmdp->status2 = 0; + } + else { + p->stats.tx_bytes -= (short)(tmdp->blen); + p->stats.tx_packets++; + } + +#ifdef XMT_VIA_SKB + if(p->tmd_skb[p->tmdlast]) { + dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]); + p->tmd_skb[p->tmdlast] = NULL; + } +#endif + + p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1); + if(p->tmdlast == p->tmdnum) + p->xmit_queued = 0; + } + netif_wake_queue(dev); +} + +/* + * We have received a packet + */ +static void ni65_recv_intr(struct net_device *dev,int csr0) +{ + struct rmd *rmdp; + int rmdstat,len; + int cnt=0; + struct priv *p = (struct priv *) dev->priv; + + rmdp = p->rmdhead + p->rmdnum; + while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN)) + { + cnt++; + if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */ + { + if(!(rmdstat & RCV_ERR)) { + if(rmdstat & RCV_START) + { + p->stats.rx_length_errors++; + printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff); + } + } + else { + if(debuglevel > 2) + printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n", + dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) ); + if(rmdstat & RCV_FRAM) + p->stats.rx_frame_errors++; + if(rmdstat & RCV_OFLO) + p->stats.rx_over_errors++; + if(rmdstat & RCV_CRC) + p->stats.rx_crc_errors++; + if(rmdstat & RCV_BUF_ERR) + p->stats.rx_fifo_errors++; + } + if(!(csr0 & CSR0_MISS)) /* don't count errors twice */ + p->stats.rx_errors++; + } + else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60) + { +#ifdef RCV_VIA_SKB + struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC); + if (skb) + skb_reserve(skb,16); +#else + struct sk_buff *skb = dev_alloc_skb(len+2); +#endif + if(skb) + { + skb_reserve(skb,2); + skb->dev = dev; +#ifdef RCV_VIA_SKB + if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) { + skb_put(skb,len); + eth_copy_and_sum(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len,0); + } + else { + struct sk_buff *skb1 = p->recv_skb[p->rmdnum]; + skb_put(skb,R_BUF_SIZE); + p->recv_skb[p->rmdnum] = skb; + rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data); + skb = skb1; + skb_trim(skb,len); + } +#else + skb_put(skb,len); + eth_copy_and_sum(skb, (unsigned char *) p->recvbounce[p->rmdnum],len,0); +#endif + p->stats.rx_packets++; + p->stats.rx_bytes += len; + skb->protocol=eth_type_trans(skb,dev); + netif_rx(skb); + dev->last_rx = jiffies; + } + else + { + printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name); + p->stats.rx_dropped++; + } + } + else { + printk(KERN_INFO "%s: received runt packet\n",dev->name); + p->stats.rx_errors++; + } + rmdp->blen = -(R_BUF_SIZE-8); + rmdp->mlen = 0; + rmdp->u.s.status = RCV_OWN; /* change owner */ + p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1); + rmdp = p->rmdhead + p->rmdnum; + } +} + +/* + * kick xmitter .. + */ + +static void ni65_timeout(struct net_device *dev) +{ + int i; + struct priv *p = (struct priv *) dev->priv; + + printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name); + for(i=0;i<TMDNUM;i++) + printk("%02x ",p->tmdhead[i].u.s.status); + printk("\n"); + ni65_lance_reinit(dev); + dev->trans_start = jiffies; + netif_wake_queue(dev); +} + +/* + * Send a packet + */ + +static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct priv *p = (struct priv *) dev->priv; + + netif_stop_queue(dev); + + if (test_and_set_bit(0, (void*)&p->lock)) { + printk(KERN_ERR "%s: Queue was locked.\n", dev->name); + return 1; + } + + { + short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; + struct tmd *tmdp; + unsigned long flags; + +#ifdef XMT_VIA_SKB + if( (unsigned long) (skb->data + skb->len) > 0x1000000) { +#endif + + memcpy((char *) p->tmdbounce[p->tmdbouncenum] ,(char *)skb->data, + (skb->len > T_BUF_SIZE) ? T_BUF_SIZE : skb->len); + if (len > skb->len) + memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len); + dev_kfree_skb (skb); + + spin_lock_irqsave(&p->ring_lock, flags); + tmdp = p->tmdhead + p->tmdnum; + tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]); + p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1); + +#ifdef XMT_VIA_SKB + } + else { + spin_lock_irqsave(&p->ring_lock, flags); + + tmdp = p->tmdhead + p->tmdnum; + tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data); + p->tmd_skb[p->tmdnum] = skb; + } +#endif + tmdp->blen = -len; + + tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; + writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */ + + p->xmit_queued = 1; + p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1); + + if(p->tmdnum != p->tmdlast) + netif_wake_queue(dev); + + p->lock = 0; + dev->trans_start = jiffies; + + spin_unlock_irqrestore(&p->ring_lock, flags); + } + + return 0; +} + +static struct net_device_stats *ni65_get_stats(struct net_device *dev) +{ + +#if 0 + int i; + struct priv *p = (struct priv *) dev->priv; + for(i=0;i<RMDNUM;i++) + { + struct rmd *rmdp = p->rmdhead + ((p->rmdnum + i) & (RMDNUM-1)); + printk("%02x ",rmdp->u.s.status); + } + printk("\n"); +#endif + + return &((struct priv *) dev->priv)->stats; +} + +static void set_multicast_list(struct net_device *dev) +{ + if(!ni65_lance_reinit(dev)) + printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name); + netif_wake_queue(dev); +} + +#ifdef MODULE +static struct net_device *dev_ni65; + +module_param(irq, int, 0); +module_param(io, int, 0); +module_param(dma, int, 0); +MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)"); +MODULE_PARM_DESC(io, "ni6510 I/O base address"); +MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)"); + +int init_module(void) +{ + dev_ni65 = ni65_probe(-1); + return IS_ERR(dev_ni65) ? PTR_ERR(dev_ni65) : 0; +} + +void cleanup_module(void) +{ + unregister_netdev(dev_ni65); + cleanup_card(dev_ni65); + free_netdev(dev_ni65); +} +#endif /* MODULE */ + +MODULE_LICENSE("GPL"); + +/* + * END of ni65.c + */ |
