apne.c

powerpc内核mpc8241linux系统下net驱动程序

    ei_status.reset_8390 = &apne_reset_8390;
    ei_status.block_input = &apne_block_input;
    ei_status.block_output = &apne_block_output;
    ei_status.get_8390_hdr = &apne_get_8390_hdr;
    ei_status.reg_offset = pcmcia_offsets;
    dev->open = &apne_open;
    dev->stop = &apne_close;
    NS8390_init(dev, 0);

    pcmcia_ack_int(pcmcia_get_intreq());		/* ack PCMCIA int req */
    pcmcia_enable_irq();

    apne_owned = 1;

    return 0;
}

static int
apne_open(struct device *dev)
{
    ei_open(dev);
    MOD_INC_USE_COUNT;
    return 0;
}

static int
apne_close(struct device *dev)
{
    if (ei_debug > 1)
	printk("%s: Shutting down ethercard.\n", dev->name);
    ei_close(dev);
    MOD_DEC_USE_COUNT;
    return 0;
}

/* Hard reset the card.  This used to pause for the same period that a
   8390 reset command required, but that shouldn't be necessary. */
static void
apne_reset_8390(struct device *dev)
{
    unsigned long reset_start_time = jiffies;

    init_pcmcia();

    if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);

    writeb(readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);

    ei_status.txing = 0;
    ei_status.dmaing = 0;

    /* This check _should_not_ be necessary, omit eventually. */
    while ((readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
	if (jiffies - reset_start_time > 2*HZ/100) {
	    printk("%s: ne_reset_8390() did not complete.\n", dev->name);
	    break;
	}
    writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);	/* Ack intr. */
}

/* Grab the 8390 specific header. Similar to the block_input routine, but
   we don't need to be concerned with ring wrap as the header will be at
   the start of a page, so we optimize accordingly. */

static void
apne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{

    int nic_base = dev->base_addr;
    int cnt;
    char *ptrc;
    short *ptrs;

    /* This *shouldn't* happen. If it does, it's the last thing you'll see */
    if (ei_status.dmaing) {
	printk("%s: DMAing conflict in ne_get_8390_hdr "
	   "[DMAstat:%d][irqlock:%d][intr:%ld].\n",
	   dev->name, ei_status.dmaing, ei_status.irqlock,
	   dev->interrupt);
	return;
    }

    ei_status.dmaing |= 0x01;
    writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
    writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
    writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
    writeb(0, nic_base + NE_EN0_RCNTHI);
    writeb(0, nic_base + NE_EN0_RSARLO);		/* On page boundary */
    writeb(ring_page, nic_base + NE_EN0_RSARHI);
    writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);

    if (ei_status.word16) {
        ptrs = (short*)hdr;
        for(cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
            *ptrs++ = readw(NE_BASE + NE_DATAPORT);
    } else {
        ptrc = (char*)hdr;
        for(cnt = 0; cnt < sizeof(struct e8390_pkt_hdr); cnt++)
            *ptrc++ = readb(NE_BASE + NE_DATAPORT);
    }

    writeb(ENISR_RDC, nic_base + NE_EN0_ISR);	/* Ack intr. */

    hdr->count = WORDSWAP(hdr->count);

    ei_status.dmaing &= ~0x01;
}

/* Block input and output, similar to the Crynwr packet driver.  If you
   are porting to a new ethercard, look at the packet driver source for hints.
   The NEx000 doesn't share the on-board packet memory -- you have to put
   the packet out through the "remote DMA" dataport using writeb. */

static void
apne_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
{
    int nic_base = dev->base_addr;
    char *buf = skb->data;
    char *ptrc;
    short *ptrs;
    int cnt;

    /* This *shouldn't* happen. If it does, it's the last thing you'll see */
    if (ei_status.dmaing) {
	printk("%s: DMAing conflict in ne_block_input "
	   "[DMAstat:%d][irqlock:%d][intr:%ld].\n",
	   dev->name, ei_status.dmaing, ei_status.irqlock,
	   dev->interrupt);
	return;
    }
    ei_status.dmaing |= 0x01;
    writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
    writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
    writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
    writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
    writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
    writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
    writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
    if (ei_status.word16) {
      ptrs = (short*)buf;
      for (cnt = 0; cnt < (count>>1); cnt++)
        *ptrs++ = readw(NE_BASE + NE_DATAPORT);
      if (count & 0x01) {
	buf[count-1] = readb(NE_BASE + NE_DATAPORT);
      }
    } else {
      ptrc = (char*)buf;
      for (cnt = 0; cnt < count; cnt++)
        *ptrc++ = readb(NE_BASE + NE_DATAPORT);
    }

    writeb(ENISR_RDC, nic_base + NE_EN0_ISR);	/* Ack intr. */
    ei_status.dmaing &= ~0x01;
}

static void
apne_block_output(struct device *dev, int count,
		const unsigned char *buf, const int start_page)
{
    int nic_base = NE_BASE;
    unsigned long dma_start;
    char *ptrc;
    short *ptrs;
    int cnt;

    /* Round the count up for word writes.  Do we need to do this?
       What effect will an odd byte count have on the 8390?
       I should check someday. */
    if (ei_status.word16 && (count & 0x01))
      count++;

    /* This *shouldn't* happen. If it does, it's the last thing you'll see */
    if (ei_status.dmaing) {
	printk("%s: DMAing conflict in ne_block_output."
	   "[DMAstat:%d][irqlock:%d][intr:%ld]\n",
	   dev->name, ei_status.dmaing, ei_status.irqlock,
	   dev->interrupt);
	return;
    }
    ei_status.dmaing |= 0x01;
    /* We should already be in page 0, but to be safe... */
    writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);

    writeb(ENISR_RDC, nic_base + NE_EN0_ISR);

   /* Now the normal output. */
    writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
    writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
    writeb(0x00, nic_base + NE_EN0_RSARLO);
    writeb(start_page, nic_base + NE_EN0_RSARHI);

    writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
    if (ei_status.word16) {
        ptrs = (short*)buf;
        for (cnt = 0; cnt < count>>1; cnt++)
            writew(*ptrs++, NE_BASE+NE_DATAPORT);
    } else {
        ptrc = (char*)buf;
        for (cnt = 0; cnt < count; cnt++)
	    writeb(*ptrc++, NE_BASE + NE_DATAPORT);
    }

    dma_start = jiffies;

    while ((readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
	if (jiffies - dma_start > 2*HZ/100) {		/* 20ms */
		printk("%s: timeout waiting for Tx RDC.\n", dev->name);
		apne_reset_8390(dev);
		NS8390_init(dev,1);
		break;
	}

    writeb(ENISR_RDC, nic_base + NE_EN0_ISR);	/* Ack intr. */
    ei_status.dmaing &= ~0x01;
    return;
}

static void apne_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
    unsigned char pcmcia_intreq;

    if (!(gayle.inten & GAYLE_IRQ_IRQ))
        return;

    pcmcia_intreq = pcmcia_get_intreq();

    if (!(pcmcia_intreq & GAYLE_IRQ_IRQ)) {
        pcmcia_ack_int(pcmcia_intreq);
        return;
    }
    if (ei_debug > 3)
        printk("pcmcia intreq = %x\n", pcmcia_intreq);
    pcmcia_disable_irq();			/* to get rid of the sti() within ei_interrupt */
    ei_interrupt(irq, dev_id, regs);
    pcmcia_ack_int(pcmcia_get_intreq());
    pcmcia_enable_irq();
}

#ifdef MODULE
static char devicename[9] = {0, };

static struct device apne_dev =
{
	devicename,
	0, 0, 0, 0,
	0, 0,
	0, 0, 0, NULL, apne_probe,
};

int init_module(void)
{
	int err;
	if ((err = register_netdev(&apne_dev))) {
		if (err == -EIO)
			printk("No PCMCIA NEx000 ethernet card found.\n");
		return (err);
	}
	lock_8390_module();
	return (0);
}

void cleanup_module(void)
{
	unregister_netdev(&apne_dev);

	pcmcia_disable_irq();

	free_irq(IRQ_AMIGA_PORTS, &apne_dev);

	pcmcia_reset();

	unlock_8390_module();

	apne_owned = 0;
}

#endif

static int init_pcmcia(void)
{
	u_char config;
#ifndef MANUAL_CONFIG
	u_char tuple[32];
	int offset_len;
#endif
	u_long offset;

	pcmcia_reset();
	pcmcia_program_voltage(PCMCIA_0V);
	pcmcia_access_speed(PCMCIA_SPEED_250NS);
	pcmcia_write_enable();

#ifdef MANUAL_CONFIG
	config = MANUAL_CONFIG;
#else
	/* get and write config byte to enable IO port */

	if (pcmcia_copy_tuple(CISTPL_CFTABLE_ENTRY, tuple, 32) < 3)
		return 0;

	config = tuple[2] & 0x3f;
#endif
#ifdef MANUAL_OFFSET
	offset = MANUAL_OFFSET;
#else
	if (pcmcia_copy_tuple(CISTPL_CONFIG, tuple, 32) < 6)
		return 0;

	offset_len = (tuple[2] & 0x3) + 1;
	offset = 0;
	while(offset_len--) {
		offset = (offset << 8) | tuple[4+offset_len];
	}
#endif

	writeb(config, GAYLE_ATTRIBUTE+offset);

	return 1;
}