p54usb.c

来自「linux 内核源代码」· C语言 代码 · 共 908 行 · 第 1/2 页

	err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, sizeof(u32));
	if (err) {
		printk(KERN_ERR "prism54usb: firmware upload failed!\n");
		goto err_upload_failed;
	}

	timeout = jiffies + msecs_to_jiffies(1000);
	while (!(err = usb_bulk_msg(priv->udev,
		usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
		if (alen > 2 && !memcmp(buf, "OK", 2))
			break;

		if (alen > 5 && !memcmp(buf, "ERROR", 5)) {
			printk(KERN_INFO "prism54usb: firmware upload failed!\n");
			err = -EINVAL;
			break;
		}

		if (time_after(jiffies, timeout)) {
			printk(KERN_ERR "prism54usb: firmware boot timed out!\n");
			err = -ETIMEDOUT;
			break;
		}
	}
	if (err)
		goto err_upload_failed;

	buf[0] = 'g';
	buf[1] = '\r';
	err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, 2);
	if (err) {
		printk(KERN_ERR "prism54usb: firmware boot failed!\n");
		goto err_upload_failed;
	}

	timeout = jiffies + msecs_to_jiffies(1000);
	while (!(err = usb_bulk_msg(priv->udev,
		usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
		if (alen > 0 && buf[0] == 'g')
			break;

		if (time_after(jiffies, timeout)) {
			err = -ETIMEDOUT;
			break;
		}
	}
	if (err)
		goto err_upload_failed;

  err_upload_failed:
	release_firmware(fw_entry);
  err_req_fw_failed:
  err_reset:
	kfree(buf);
  err_bufalloc:
	return err;
}

static int p54u_upload_firmware_net2280(struct ieee80211_hw *dev)
{
	struct p54u_priv *priv = dev->priv;
	const struct firmware *fw_entry = NULL;
	const struct p54p_csr *devreg = (const struct p54p_csr *) P54U_DEV_BASE;
	int err, alen;
	void *buf;
	__le32 reg;
	unsigned int remains, offset;
	u8 *data;

	buf = kmalloc(512, GFP_KERNEL);
	if (!buf) {
		printk(KERN_ERR "p54usb: firmware buffer alloc failed!\n");
		return -ENOMEM;
	}

	err = request_firmware(&fw_entry, "isl3890usb", &priv->udev->dev);
	if (err) {
		printk(KERN_ERR "p54usb: cannot find firmware (isl3890usb)!\n");
		kfree(buf);
		return err;
	}

	p54_parse_firmware(dev, fw_entry);

#define P54U_WRITE(type, addr, data) \
	do {\
		err = p54u_write(priv, buf, type,\
				 cpu_to_le32((u32)(unsigned long)addr), data);\
		if (err) \
			goto fail;\
	} while (0)

#define P54U_READ(type, addr) \
	do {\
		err = p54u_read(priv, buf, type,\
				cpu_to_le32((u32)(unsigned long)addr), &reg);\
		if (err)\
			goto fail;\
	} while (0)

	/* power down net2280 bridge */
	P54U_READ(NET2280_BRG_U32, NET2280_GPIOCTL);
	reg |= cpu_to_le32(P54U_BRG_POWER_DOWN);
	reg &= cpu_to_le32(~P54U_BRG_POWER_UP);
	P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);

	mdelay(100);

	/* power up bridge */
	reg |= cpu_to_le32(P54U_BRG_POWER_UP);
	reg &= cpu_to_le32(~P54U_BRG_POWER_DOWN);
	P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);

	mdelay(100);

	P54U_WRITE(NET2280_BRG_U32, NET2280_DEVINIT,
		   cpu_to_le32(NET2280_CLK_30Mhz |
			       NET2280_PCI_ENABLE |
			       NET2280_PCI_SOFT_RESET));

	mdelay(20);

	P54U_WRITE(NET2280_BRG_CFG_U16, PCI_COMMAND,
		   cpu_to_le32(PCI_COMMAND_MEMORY |
			       PCI_COMMAND_MASTER));

	P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_0,
		   cpu_to_le32(NET2280_BASE));

	P54U_READ(NET2280_BRG_CFG_U16, PCI_STATUS);
	reg |= cpu_to_le32(PCI_STATUS_REC_MASTER_ABORT);
	P54U_WRITE(NET2280_BRG_CFG_U16, PCI_STATUS, reg);

	// TODO: we really need this?
	P54U_READ(NET2280_BRG_U32, NET2280_RELNUM);

	P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_RSP,
		   cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));
	P54U_WRITE(NET2280_BRG_U32, NET2280_EPC_RSP,
		   cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));

	P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_2,
		   cpu_to_le32(NET2280_BASE2));

	/* finally done setting up the bridge */

	P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | PCI_COMMAND,
		   cpu_to_le32(PCI_COMMAND_MEMORY |
			       PCI_COMMAND_MASTER));

	P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | 0x40 /* TRDY timeout */, 0);
	P54U_WRITE(NET2280_DEV_CFG_U32, 0x10000 | PCI_BASE_ADDRESS_0,
		   cpu_to_le32(P54U_DEV_BASE));

	P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
	P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));

	/* do romboot */
	P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable, 0);

	P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RAMBOOT);
	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);

	mdelay(20);

	reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);

	mdelay(20);

	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);

	mdelay(100);

	P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
	P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);

	/* finally, we can upload firmware now! */
	remains = fw_entry->size;
	data = fw_entry->data;
	offset = ISL38XX_DEV_FIRMWARE_ADDR;

	while (remains) {
		unsigned int block_len = min(remains, (unsigned int)512);
		memcpy(buf, data, block_len);

		err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, block_len);
		if (err) {
			printk(KERN_ERR "prism54usb: firmware block upload "
			       "failed\n");
			goto fail;
		}

		P54U_WRITE(NET2280_DEV_U32, &devreg->direct_mem_base,
			   cpu_to_le32(0xc0000f00));

		P54U_WRITE(NET2280_DEV_U32,
			   0x0020 | (unsigned long)&devreg->direct_mem_win, 0);
		P54U_WRITE(NET2280_DEV_U32,
			   0x0020 | (unsigned long)&devreg->direct_mem_win,
			   cpu_to_le32(1));

		P54U_WRITE(NET2280_DEV_U32,
			   0x0024 | (unsigned long)&devreg->direct_mem_win,
			   cpu_to_le32(block_len));
		P54U_WRITE(NET2280_DEV_U32,
			   0x0028 | (unsigned long)&devreg->direct_mem_win,
			   cpu_to_le32(offset));

		P54U_WRITE(NET2280_DEV_U32, &devreg->dma_addr,
			   cpu_to_le32(NET2280_EPA_FIFO_PCI_ADDR));
		P54U_WRITE(NET2280_DEV_U32, &devreg->dma_len,
			   cpu_to_le32(block_len >> 2));
		P54U_WRITE(NET2280_DEV_U32, &devreg->dma_ctrl,
			   cpu_to_le32(ISL38XX_DMA_MASTER_CONTROL_TRIGGER));

		mdelay(10);

		P54U_READ(NET2280_DEV_U32,
			  0x002C | (unsigned long)&devreg->direct_mem_win);
		if (!(reg & cpu_to_le32(ISL38XX_DMA_STATUS_DONE)) ||
		    !(reg & cpu_to_le32(ISL38XX_DMA_STATUS_READY))) {
			printk(KERN_ERR "prism54usb: firmware DMA transfer "
			       "failed\n");
			goto fail;
		}

		P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_STAT,
			   cpu_to_le32(NET2280_FIFO_FLUSH));

		remains -= block_len;
		data += block_len;
		offset += block_len;
	}

	/* do ramboot */
	P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
	reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RAMBOOT);
	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);

	mdelay(20);

	reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);

	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);

	mdelay(100);

	P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
	P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);

	/* start up the firmware */
	P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable,
		   cpu_to_le32(ISL38XX_INT_IDENT_INIT));

	P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));

	P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1,
		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT_ENABLE |
			       NET2280_USB_INTERRUPT_ENABLE));

	P54U_WRITE(NET2280_DEV_U32, &devreg->dev_int,
		   cpu_to_le32(ISL38XX_DEV_INT_RESET));

	err = usb_interrupt_msg(priv->udev,
				usb_rcvbulkpipe(priv->udev, P54U_PIPE_INT),
				buf, sizeof(__le32), &alen, 1000);
	if (err || alen != sizeof(__le32))
		goto fail;

	P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
	P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);

	if (!(reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT)))
		err = -EINVAL;

	P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
	P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));

#undef P54U_WRITE
#undef P54U_READ

 fail:
	release_firmware(fw_entry);
	kfree(buf);
	return err;
}

static int p54u_open(struct ieee80211_hw *dev)
{
	struct p54u_priv *priv = dev->priv;
	int err;

	err = p54u_init_urbs(dev);
	if (err) {
		return err;
	}

	priv->common.open = p54u_init_urbs;

	return 0;
}

static void p54u_stop(struct ieee80211_hw *dev)
{
	/* TODO: figure out how to reliably stop the 3887 and net2280 so
	   the hardware is still usable next time we want to start it.
	   until then, we just stop listening to the hardware.. */
	p54u_free_urbs(dev);
	return;
}

static int __devinit p54u_probe(struct usb_interface *intf,
				const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct ieee80211_hw *dev;
	struct p54u_priv *priv;
	int err;
	unsigned int i, recognized_pipes;
	DECLARE_MAC_BUF(mac);

	dev = p54_init_common(sizeof(*priv));
	if (!dev) {
		printk(KERN_ERR "prism54usb: ieee80211 alloc failed\n");
		return -ENOMEM;
	}

	priv = dev->priv;

	SET_IEEE80211_DEV(dev, &intf->dev);
	usb_set_intfdata(intf, dev);
	priv->udev = udev;

	usb_get_dev(udev);

	/* really lazy and simple way of figuring out if we're a 3887 */
	/* TODO: should just stick the identification in the device table */
	i = intf->altsetting->desc.bNumEndpoints;
	recognized_pipes = 0;
	while (i--) {
		switch (intf->altsetting->endpoint[i].desc.bEndpointAddress) {
		case P54U_PIPE_DATA:
		case P54U_PIPE_MGMT:
		case P54U_PIPE_BRG:
		case P54U_PIPE_DEV:
		case P54U_PIPE_DATA | USB_DIR_IN:
		case P54U_PIPE_MGMT | USB_DIR_IN:
		case P54U_PIPE_BRG | USB_DIR_IN:
		case P54U_PIPE_DEV | USB_DIR_IN:
		case P54U_PIPE_INT | USB_DIR_IN:
			recognized_pipes++;
		}
	}
	priv->common.open = p54u_open;

	if (recognized_pipes < P54U_PIPE_NUMBER) {
		priv->hw_type = P54U_3887;
		priv->common.tx = p54u_tx_3887;
	} else {
		dev->extra_tx_headroom += sizeof(struct net2280_tx_hdr);
		priv->common.tx_hdr_len = sizeof(struct net2280_tx_hdr);
		priv->common.tx = p54u_tx_net2280;
	}
	priv->common.stop = p54u_stop;

	if (priv->hw_type)
		err = p54u_upload_firmware_3887(dev);
	else
		err = p54u_upload_firmware_net2280(dev);
	if (err)
		goto err_free_dev;

	err = p54u_read_eeprom(dev);
	if (err)
		goto err_free_dev;

	if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
		u8 perm_addr[ETH_ALEN];

		printk(KERN_WARNING "prism54usb: Invalid hwaddr! Using randomly generated MAC addr\n");
		random_ether_addr(perm_addr);
		SET_IEEE80211_PERM_ADDR(dev, perm_addr);
	}

	skb_queue_head_init(&priv->rx_queue);

	err = ieee80211_register_hw(dev);
	if (err) {
		printk(KERN_ERR "prism54usb: Cannot register netdevice\n");
		goto err_free_dev;
	}

	printk(KERN_INFO "%s: hwaddr %s, isl38%02x\n",
	       wiphy_name(dev->wiphy),
	       print_mac(mac, dev->wiphy->perm_addr),
	       priv->common.version);

	return 0;

 err_free_dev:
	ieee80211_free_hw(dev);
	usb_set_intfdata(intf, NULL);
	usb_put_dev(udev);
	return err;
}

static void __devexit p54u_disconnect(struct usb_interface *intf)
{
	struct ieee80211_hw *dev = usb_get_intfdata(intf);
	struct p54u_priv *priv;

	if (!dev)
		return;

	ieee80211_unregister_hw(dev);

	priv = dev->priv;
	usb_put_dev(interface_to_usbdev(intf));
	p54_free_common(dev);
	ieee80211_free_hw(dev);
}

static struct usb_driver p54u_driver = {
	.name	= "prism54usb",
	.id_table = p54u_table,
	.probe = p54u_probe,
	.disconnect = p54u_disconnect,
};

static int __init p54u_init(void)
{
	return usb_register(&p54u_driver);
}

static void __exit p54u_exit(void)
{
	usb_deregister(&p54u_driver);
}

module_init(p54u_init);
module_exit(p54u_exit);