bt3c_cs.c

Linux环境下的蓝牙模块驱动程序源代码

}


static int bt3c_hci_close(struct hci_dev *hdev)
{
	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
		return 0;

	bt3c_hci_flush(hdev);

	return 0;
}


static int bt3c_hci_send_frame(struct sk_buff *skb)
{
	bt3c_info_t *info;
	struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
	unsigned long flags;

	if (!hdev) {
		BT_ERR("Frame for unknown HCI device (hdev=NULL)");
		return -ENODEV;
	}

	info = (bt3c_info_t *) (hdev->driver_data);

	switch (bt_cb(skb)->pkt_type) {
	case HCI_COMMAND_PKT:
		hdev->stat.cmd_tx++;
		break;
	case HCI_ACLDATA_PKT:
		hdev->stat.acl_tx++;
		break;
	case HCI_SCODATA_PKT:
		hdev->stat.sco_tx++;
		break;
	};

	/* Prepend skb with frame type */
	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
	skb_queue_tail(&(info->txq), skb);

	spin_lock_irqsave(&(info->lock), flags);

	bt3c_write_wakeup(info);

	spin_unlock_irqrestore(&(info->lock), flags);

	return 0;
}


static void bt3c_hci_destruct(struct hci_dev *hdev)
{
}


static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
{
	return -ENOIOCTLCMD;
}



/* ======================== Card services HCI interaction ======================== */


static int bt3c_load_firmware(bt3c_info_t *info, const unsigned char *firmware,
			      int count)
{
	char *ptr = (char *) firmware;
	char b[9];
	unsigned int iobase, size, addr, fcs, tmp;
	int i, err = 0;

	iobase = info->p_dev->io.BasePort1;

	/* Reset */
	bt3c_io_write(iobase, 0x8040, 0x0404);
	bt3c_io_write(iobase, 0x8040, 0x0400);

	udelay(1);

	bt3c_io_write(iobase, 0x8040, 0x0404);

	udelay(17);

	/* Load */
	while (count) {
		if (ptr[0] != 'S') {
			BT_ERR("Bad address in firmware");
			err = -EFAULT;
			goto error;
		}

		memset(b, 0, sizeof(b));
		memcpy(b, ptr + 2, 2);
		size = simple_strtoul(b, NULL, 16);

		memset(b, 0, sizeof(b));
		memcpy(b, ptr + 4, 8);
		addr = simple_strtoul(b, NULL, 16);

		memset(b, 0, sizeof(b));
		memcpy(b, ptr + (size * 2) + 2, 2);
		fcs = simple_strtoul(b, NULL, 16);

		memset(b, 0, sizeof(b));
		for (tmp = 0, i = 0; i < size; i++) {
			memcpy(b, ptr + (i * 2) + 2, 2);
			tmp += simple_strtol(b, NULL, 16);
		}

		if (((tmp + fcs) & 0xff) != 0xff) {
			BT_ERR("Checksum error in firmware");
			err = -EILSEQ;
			goto error;
		}

		if (ptr[1] == '3') {
			bt3c_address(iobase, addr);

			memset(b, 0, sizeof(b));
			for (i = 0; i < (size - 4) / 2; i++) {
				memcpy(b, ptr + (i * 4) + 12, 4);
				tmp = simple_strtoul(b, NULL, 16);
				bt3c_put(iobase, tmp);
			}
		}

		ptr   += (size * 2) + 6;
		count -= (size * 2) + 6;
	}

	udelay(17);

	/* Boot */
	bt3c_address(iobase, 0x3000);
	outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);

error:
	udelay(17);

	/* Clear */
	bt3c_io_write(iobase, 0x7006, 0x0000);
	bt3c_io_write(iobase, 0x7005, 0x0000);
	bt3c_io_write(iobase, 0x7001, 0x0000);

	return err;
}


static int bt3c_open(bt3c_info_t *info)
{
	const struct firmware *firmware;
	struct hci_dev *hdev;
	int err;

	spin_lock_init(&(info->lock));

	skb_queue_head_init(&(info->txq));

	info->rx_state = RECV_WAIT_PACKET_TYPE;
	info->rx_count = 0;
	info->rx_skb = NULL;

	/* Initialize HCI device */
	hdev = hci_alloc_dev();
	if (!hdev) {
		BT_ERR("Can't allocate HCI device");
		return -ENOMEM;
	}

	info->hdev = hdev;

	hdev->type = HCI_PCCARD;
	hdev->driver_data = info;
	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);

	hdev->open     = bt3c_hci_open;
	hdev->close    = bt3c_hci_close;
	hdev->flush    = bt3c_hci_flush;
	hdev->send     = bt3c_hci_send_frame;
	hdev->destruct = bt3c_hci_destruct;
	hdev->ioctl    = bt3c_hci_ioctl;

	hdev->owner = THIS_MODULE;

	/* Load firmware */
	err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
	if (err < 0) {
		BT_ERR("Firmware request failed");
		goto error;
	}

	err = bt3c_load_firmware(info, firmware->data, firmware->size);

	release_firmware(firmware);

	if (err < 0) {
		BT_ERR("Firmware loading failed");
		goto error;
	}

	/* Timeout before it is safe to send the first HCI packet */
	msleep(1000);

	/* Register HCI device */
	err = hci_register_dev(hdev);
	if (err < 0) {
		BT_ERR("Can't register HCI device");
		goto error;
	}

	return 0;

error:
	info->hdev = NULL;
	hci_free_dev(hdev);
	return err;
}


static int bt3c_close(bt3c_info_t *info)
{
	struct hci_dev *hdev = info->hdev;

	if (!hdev)
		return -ENODEV;

	bt3c_hci_close(hdev);

	if (hci_unregister_dev(hdev) < 0)
		BT_ERR("Can't unregister HCI device %s", hdev->name);

	hci_free_dev(hdev);

	return 0;
}

static int bt3c_probe(struct pcmcia_device *link)
{
	bt3c_info_t *info;

	/* Create new info device */
	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	info->p_dev = link;
	link->priv = info;

	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
	link->io.NumPorts1 = 8;
	link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT;
	link->irq.IRQInfo1 = IRQ_LEVEL_ID;

	link->irq.Handler = bt3c_interrupt;
	link->irq.Instance = info;

	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.IntType = INT_MEMORY_AND_IO;

	return bt3c_config(link);
}


static void bt3c_detach(struct pcmcia_device *link)
{
	bt3c_info_t *info = link->priv;

	bt3c_release(link);
	kfree(info);
}

static int bt3c_check_config(struct pcmcia_device *p_dev,
			     cistpl_cftable_entry_t *cf,
			     cistpl_cftable_entry_t *dflt,
			     unsigned int vcc,
			     void *priv_data)
{
	unsigned long try = (unsigned long) priv_data;

	if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
		p_dev->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
	if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) &&
	    (cf->io.win[0].base != 0)) {
		p_dev->io.BasePort1 = cf->io.win[0].base;
		p_dev->io.IOAddrLines = (try == 0) ? 16 :
			cf->io.flags & CISTPL_IO_LINES_MASK;
		if (!pcmcia_request_io(p_dev, &p_dev->io))
			return 0;
	}
	return -ENODEV;
}

static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
				      cistpl_cftable_entry_t *cf,
				      cistpl_cftable_entry_t *dflt,
				      unsigned int vcc,
				      void *priv_data)
{
	static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
	int j;

	if ((cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
		for (j = 0; j < 5; j++) {
			p_dev->io.BasePort1 = base[j];
			p_dev->io.IOAddrLines = base[j] ? 16 : 3;
			if (!pcmcia_request_io(p_dev, &p_dev->io))
				return 0;
		}
	}
	return -ENODEV;
}

static int bt3c_config(struct pcmcia_device *link)
{
	bt3c_info_t *info = link->priv;
	int i;
	unsigned long try;

	/* First pass: look for a config entry that looks normal.
	   Two tries: without IO aliases, then with aliases */
	for (try = 0; try < 2; try++)
		if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
			goto found_port;

	/* Second pass: try to find an entry that isn't picky about
	   its base address, then try to grab any standard serial port
	   address, and finally try to get any free port. */
	if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
		goto found_port;

	BT_ERR("No usable port range found");
	cs_error(link, RequestIO, -ENODEV);
	goto failed;

found_port:
	i = pcmcia_request_irq(link, &link->irq);
	if (i != 0) {
		cs_error(link, RequestIRQ, i);
		link->irq.AssignedIRQ = 0;
	}

	i = pcmcia_request_configuration(link, &link->conf);
	if (i != 0) {
		cs_error(link, RequestConfiguration, i);
		goto failed;
	}

	if (bt3c_open(info) != 0)
		goto failed;

	strcpy(info->node.dev_name, info->hdev->name);
	link->dev_node = &info->node;

	return 0;

failed:
	bt3c_release(link);
	return -ENODEV;
}


static void bt3c_release(struct pcmcia_device *link)
{
	bt3c_info_t *info = link->priv;

	bt3c_close(info);

	pcmcia_disable_device(link);
}


static struct pcmcia_device_id bt3c_ids[] = {
	PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
	PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);

static struct pcmcia_driver bt3c_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "bt3c_cs",
	},
	.probe		= bt3c_probe,
	.remove		= bt3c_detach,
	.id_table	= bt3c_ids,
};

static int __init init_bt3c_cs(void)
{
	return pcmcia_register_driver(&bt3c_driver);
}


static void __exit exit_bt3c_cs(void)
{
	pcmcia_unregister_driver(&bt3c_driver);
}

module_init(init_bt3c_cs);
module_exit(exit_bt3c_cs);