ax88796.c

linux 内核源代码

	ax->running = 0;
	wmb();

	del_timer_sync(&ax->mii_timer);
	ax_ei_close(dev);

	free_irq(dev->irq, dev);
	return 0;
}

static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
	struct ax_device *ax = to_ax_dev(dev);
	unsigned long flags;
	int rc;

	if (!netif_running(dev))
		return -EINVAL;

	spin_lock_irqsave(&ax->mii_lock, flags);
	rc = generic_mii_ioctl(&ax->mii, if_mii(req), cmd, NULL);
	spin_unlock_irqrestore(&ax->mii_lock, flags);

	return rc;
}

/* ethtool ops */

static void ax_get_drvinfo(struct net_device *dev,
			   struct ethtool_drvinfo *info)
{
	struct ax_device *ax = to_ax_dev(dev);

	strcpy(info->driver, DRV_NAME);
	strcpy(info->version, DRV_VERSION);
	strcpy(info->bus_info, ax->dev->name);
}

static int ax_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct ax_device *ax = to_ax_dev(dev);
	unsigned long flags;

	spin_lock_irqsave(&ax->mii_lock, flags);
	mii_ethtool_gset(&ax->mii, cmd);
	spin_lock_irqsave(&ax->mii_lock, flags);

	return 0;
}

static int ax_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct ax_device *ax = to_ax_dev(dev);
	unsigned long flags;
	int rc;

	spin_lock_irqsave(&ax->mii_lock, flags);
	rc = mii_ethtool_sset(&ax->mii, cmd);
	spin_lock_irqsave(&ax->mii_lock, flags);

	return rc;
}

static int ax_nway_reset(struct net_device *dev)
{
	struct ax_device *ax = to_ax_dev(dev);
	return mii_nway_restart(&ax->mii);
}

static u32 ax_get_link(struct net_device *dev)
{
	struct ax_device *ax = to_ax_dev(dev);
	return mii_link_ok(&ax->mii);
}

static const struct ethtool_ops ax_ethtool_ops = {
	.get_drvinfo		= ax_get_drvinfo,
	.get_settings		= ax_get_settings,
	.set_settings		= ax_set_settings,
	.nway_reset		= ax_nway_reset,
	.get_link		= ax_get_link,
};

#ifdef CONFIG_AX88796_93CX6
static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
	struct ei_device *ei_local = eeprom->data;
	u8 reg = ei_inb(ei_local->mem + AX_MEMR);

	eeprom->reg_data_in = reg & AX_MEMR_EEI;
	eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
	eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
	eeprom->reg_chip_select = reg & AX_MEMR_EECS;
}

static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
	struct ei_device *ei_local = eeprom->data;
	u8 reg = ei_inb(ei_local->mem + AX_MEMR);

	reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);

	if (eeprom->reg_data_in)
		reg |= AX_MEMR_EEI;
	if (eeprom->reg_data_clock)
		reg |= AX_MEMR_EECLK;
	if (eeprom->reg_chip_select)
		reg |= AX_MEMR_EECS;

	ei_outb(reg, ei_local->mem + AX_MEMR);
	udelay(10);
}
#endif

/* setup code */

static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
{
	void __iomem *ioaddr = ei_local->mem;
	struct ax_device *ax = to_ax_dev(dev);

	/* Select page 0*/
	ei_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, ioaddr + E8390_CMD);

	/* set to byte access */
	ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
	ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
}

/* ax_init_dev
 *
 * initialise the specified device, taking care to note the MAC
 * address it may already have (if configured), ensure
 * the device is ready to be used by lib8390.c and registerd with
 * the network layer.
 */

static int ax_init_dev(struct net_device *dev, int first_init)
{
	struct ei_device *ei_local = netdev_priv(dev);
	struct ax_device *ax = to_ax_dev(dev);
	void __iomem *ioaddr = ei_local->mem;
	unsigned int start_page;
	unsigned int stop_page;
	int ret;
	int i;

	ret = ax_initial_check(dev);
	if (ret)
		goto err_out;

	/* setup goes here */

	ax_initial_setup(dev, ei_local);

	/* read the mac from the card prom if we need it */

	if (first_init && ax->plat->flags & AXFLG_HAS_EEPROM) {
		unsigned char SA_prom[32];

		for(i = 0; i < sizeof(SA_prom); i+=2) {
			SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
			SA_prom[i+1] = ei_inb(ioaddr + NE_DATAPORT);
		}

		if (ax->plat->wordlength == 2)
			for (i = 0; i < 16; i++)
				SA_prom[i] = SA_prom[i+i];

		memcpy(dev->dev_addr,  SA_prom, 6);
	}

#ifdef CONFIG_AX88796_93CX6
	if (first_init && ax->plat->flags & AXFLG_HAS_93CX6) {
		unsigned char mac_addr[6];
		struct eeprom_93cx6 eeprom;

		eeprom.data = ei_local;
		eeprom.register_read = ax_eeprom_register_read;
		eeprom.register_write = ax_eeprom_register_write;
		eeprom.width = PCI_EEPROM_WIDTH_93C56;

		eeprom_93cx6_multiread(&eeprom, 0,
				       (__le16 __force *)mac_addr,
				       sizeof(mac_addr) >> 1);

		memcpy(dev->dev_addr,  mac_addr, 6);
	}
#endif
	if (ax->plat->wordlength == 2) {
		/* We must set the 8390 for word mode. */
		ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
		start_page = NESM_START_PG;
		stop_page = NESM_STOP_PG;
	} else {
		start_page = NE1SM_START_PG;
		stop_page = NE1SM_STOP_PG;
	}

	/* load the mac-address from the device if this is the
	 * first time we've initialised */

	if (first_init && ax->plat->flags & AXFLG_MAC_FROMDEV) {
		ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
			ei_local->mem + E8390_CMD); /* 0x61 */

		for (i = 0 ; i < ETHER_ADDR_LEN ; i++)
			dev->dev_addr[i] = ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
	}

	ax_reset_8390(dev);

	ei_status.name = "AX88796";
	ei_status.tx_start_page = start_page;
	ei_status.stop_page = stop_page;
	ei_status.word16 = (ax->plat->wordlength == 2);
	ei_status.rx_start_page = start_page + TX_PAGES;

#ifdef PACKETBUF_MEMSIZE
	 /* Allow the packet buffer size to be overridden by know-it-alls. */
	ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
#endif

	ei_status.reset_8390	= &ax_reset_8390;
	ei_status.block_input	= &ax_block_input;
	ei_status.block_output	= &ax_block_output;
	ei_status.get_8390_hdr	= &ax_get_8390_hdr;
	ei_status.priv = 0;

	dev->open		= ax_open;
	dev->stop		= ax_close;
	dev->do_ioctl		= ax_ioctl;
	dev->ethtool_ops	= &ax_ethtool_ops;

	ax->msg_enable		= NETIF_MSG_LINK;
	ax->mii.phy_id_mask	= 0x1f;
	ax->mii.reg_num_mask	= 0x1f;
	ax->mii.phy_id		= 0x10;		/* onboard phy */
	ax->mii.force_media	= 0;
	ax->mii.full_duplex	= 0;
	ax->mii.mdio_read	= ax_phy_read;
	ax->mii.mdio_write	= ax_phy_write;
	ax->mii.dev		= dev;

#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = ax_ei_poll;
#endif
	ax_NS8390_init(dev, 0);

	if (first_init) {
		printk("AX88796: %dbit, irq %d, %lx, MAC: ",
		       ei_status.word16 ? 16:8, dev->irq, dev->base_addr);

		for (i = 0; i < ETHER_ADDR_LEN; i++)
			printk("%2.2x%c", dev->dev_addr[i],
			       (i < (ETHER_ADDR_LEN-1) ? ':' : ' '));

		printk("\n");
	}

	ret = register_netdev(dev);
	if (ret)
		goto out_irq;

	return 0;

 out_irq:
	/* cleanup irq */
	free_irq(dev->irq, dev);
 err_out:
	return ret;
}

static int ax_remove(struct platform_device *_dev)
{
	struct net_device *dev = platform_get_drvdata(_dev);
	struct ax_device  *ax;

	ax = to_ax_dev(dev);

	unregister_netdev(dev);
	free_irq(dev->irq, dev);

	iounmap(ei_status.mem);
	release_resource(ax->mem);
	kfree(ax->mem);

	if (ax->map2) {
		iounmap(ax->map2);
		release_resource(ax->mem2);
		kfree(ax->mem2);
	}

	free_netdev(dev);

	return 0;
}

/* ax_probe
 *
 * This is the entry point when the platform device system uses to
 * notify us of a new device to attach to. Allocate memory, find
 * the resources and information passed, and map the necessary registers.
*/

static int ax_probe(struct platform_device *pdev)
{
	struct net_device *dev;
	struct ax_device  *ax;
	struct resource   *res;
	size_t size;
	int ret;

	dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
	if (dev == NULL)
		return -ENOMEM;

	/* ok, let's setup our device */
	ax = to_ax_dev(dev);

	memset(ax, 0, sizeof(struct ax_device));

	spin_lock_init(&ax->mii_lock);

	ax->dev = pdev;
	ax->plat = pdev->dev.platform_data;
	platform_set_drvdata(pdev, dev);

	ei_status.rxcr_base  = ax->plat->rcr_val;

	/* find the platform resources */

	dev->irq  = platform_get_irq(pdev, 0);
	if (dev->irq < 0) {
		dev_err(&pdev->dev, "no IRQ specified\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "no MEM specified\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	size = (res->end - res->start) + 1;

	/* setup the register offsets from either the platform data
	 * or by using the size of the resource provided */

	if (ax->plat->reg_offsets)
		ei_status.reg_offset = ax->plat->reg_offsets;
	else {
		ei_status.reg_offset = ax->reg_offsets;
		for (ret = 0; ret < 0x18; ret++)
			ax->reg_offsets[ret] = (size / 0x18) * ret;
	}

	ax->mem = request_mem_region(res->start, size, pdev->name);
	if (ax->mem == NULL) {
		dev_err(&pdev->dev, "cannot reserve registers\n");
 		ret = -ENXIO;
		goto exit_mem;
	}

	ei_status.mem = ioremap(res->start, size);
	dev->base_addr = (unsigned long)ei_status.mem;

	if (ei_status.mem == NULL) {
		dev_err(&pdev->dev, "Cannot ioremap area (%08llx,%08llx)\n",
			(unsigned long long)res->start,
			(unsigned long long)res->end);

 		ret = -ENXIO;
		goto exit_req;
	}

	/* look for reset area */

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (res == NULL) {
		if (!ax->plat->reg_offsets) {
			for (ret = 0; ret < 0x20; ret++)
				ax->reg_offsets[ret] = (size / 0x20) * ret;
		}

		ax->map2 = NULL;
	} else {
 		size = (res->end - res->start) + 1;

		ax->mem2 = request_mem_region(res->start, size, pdev->name);
		if (ax->mem == NULL) {
			dev_err(&pdev->dev, "cannot reserve registers\n");
			ret = -ENXIO;
			goto exit_mem1;
		}

		ax->map2 = ioremap(res->start, size);
		if (ax->map2 == NULL) {
			dev_err(&pdev->dev, "cannot map reset register\n");
			ret = -ENXIO;
			goto exit_mem2;
		}

		ei_status.reg_offset[0x1f] = ax->map2 - ei_status.mem;
	}

	/* got resources, now initialise and register device */

	ret = ax_init_dev(dev, 1);
	if (!ret)
		return 0;

	if (ax->map2 == NULL)
		goto exit_mem1;

	iounmap(ax->map2);

 exit_mem2:
	release_resource(ax->mem2);
	kfree(ax->mem2);

 exit_mem1:
	iounmap(ei_status.mem);

 exit_req:
	release_resource(ax->mem);
	kfree(ax->mem);

 exit_mem:
	free_netdev(dev);

	return ret;
}

/* suspend and resume */

#ifdef CONFIG_PM
static int ax_suspend(struct platform_device *dev, pm_message_t state)
{
	struct net_device *ndev = platform_get_drvdata(dev);
	struct ax_device  *ax = to_ax_dev(ndev);

	ax->resume_open = ax->running;

	netif_device_detach(ndev);
	ax_close(ndev);

	return 0;
}

static int ax_resume(struct platform_device *pdev)
{
	struct net_device *ndev = platform_get_drvdata(pdev);
	struct ax_device  *ax = to_ax_dev(ndev);

	ax_initial_setup(ndev, netdev_priv(ndev));
	ax_NS8390_init(ndev, ax->resume_open);
	netif_device_attach(ndev);

	if (ax->resume_open)
		ax_open(ndev);

	return 0;
}

#else
#define ax_suspend NULL
#define ax_resume  NULL
#endif

static struct platform_driver axdrv = {
	.driver	= {
		.name		= "ax88796",
		.owner		= THIS_MODULE,
	},
	.probe		= ax_probe,
	.remove		= ax_remove,
	.suspend	= ax_suspend,
	.resume		= ax_resume,
};

static int __init axdrv_init(void)
{
	return platform_driver_register(&axdrv);
}

static void __exit axdrv_exit(void)
{
	platform_driver_unregister(&axdrv);
}

module_init(axdrv_init);
module_exit(axdrv_exit);

MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
MODULE_AUTHOR("Ben Dooks, <[e-mail]>");
MODULE_LICENSE("GPL v2");