bluecard_cs.c

嵌入式Linux的蓝牙模块驱动

	spin_unlock(&(info->lock));

	return IRQ_HANDLED;
}



/* ======================== Device specific HCI commands ======================== */


static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud)
{
	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
	struct sk_buff *skb;

	/* Ericsson baud rate command */
	unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };

	if (!(skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
		BT_ERR("Can't allocate mem for new packet");
		return -1;
	}

	switch (baud) {
	case 460800:
		cmd[4] = 0x00;
		skb->pkt_type = PKT_BAUD_RATE_460800;
		break;
	case 230400:
		cmd[4] = 0x01;
		skb->pkt_type = PKT_BAUD_RATE_230400;
		break;
	case 115200:
		cmd[4] = 0x02;
		skb->pkt_type = PKT_BAUD_RATE_115200;
		break;
	case 57600:
		/* Fall through... */
	default:
		cmd[4] = 0x03;
		skb->pkt_type = PKT_BAUD_RATE_57600;
		break;
	}

	memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));

	skb_queue_tail(&(info->txq), skb);

	bluecard_write_wakeup(info);

	return 0;
}



/* ======================== HCI interface ======================== */


static int bluecard_hci_flush(struct hci_dev *hdev)
{
	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);

	/* Drop TX queue */
	skb_queue_purge(&(info->txq));

	return 0;
}


static int bluecard_hci_open(struct hci_dev *hdev)
{
	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
	unsigned int iobase = info->link.io.BasePort1;

	if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
		bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);

	if (test_and_set_bit(HCI_RUNNING, &(hdev->flags)))
		return 0;

	if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
		/* Enable LED */
		outb(0x08 | 0x20, iobase + 0x30);
	}

	return 0;
}


static int bluecard_hci_close(struct hci_dev *hdev)
{
	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
	unsigned int iobase = info->link.io.BasePort1;

	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
		return 0;

	bluecard_hci_flush(hdev);

	if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
		/* Disable LED */
		outb(0x00, iobase + 0x30);
	}

	return 0;
}


static int bluecard_hci_send_frame(struct sk_buff *skb)
{
	bluecard_info_t *info;
	struct hci_dev *hdev = (struct hci_dev *)(skb->dev);

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

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

	switch (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), &(skb->pkt_type), 1);
	skb_queue_tail(&(info->txq), skb);

	bluecard_write_wakeup(info);

	return 0;
}


static void bluecard_hci_destruct(struct hci_dev *hdev)
{
}


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



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


int bluecard_open(bluecard_info_t *info)
{
	unsigned int iobase = info->link.io.BasePort1;
	struct hci_dev *hdev;
	unsigned char id;

	spin_lock_init(&(info->lock));

	init_timer(&(info->timer));
	info->timer.function = &bluecard_activity_led_timeout;
	info->timer.data = (u_long)info;

	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;

	hdev->open     = bluecard_hci_open;
	hdev->close    = bluecard_hci_close;
	hdev->flush    = bluecard_hci_flush;
	hdev->send     = bluecard_hci_send_frame;
	hdev->destruct = bluecard_hci_destruct;
	hdev->ioctl    = bluecard_hci_ioctl;

	hdev->owner = THIS_MODULE;

	id = inb(iobase + 0x30);

	if ((id & 0x0f) == 0x02)
		set_bit(CARD_HAS_PCCARD_ID, &(info->hw_state));

	if (id & 0x10)
		set_bit(CARD_HAS_POWER_LED, &(info->hw_state));

	if (id & 0x20)
		set_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state));

	/* Reset card */
	info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
	outb(info->ctrl_reg, iobase + REG_CONTROL);

	/* Turn FPGA off */
	outb(0x80, iobase + 0x30);

	/* Wait some time */
	msleep(10);

	/* Turn FPGA on */
	outb(0x00, iobase + 0x30);

	/* Activate card */
	info->ctrl_reg = REG_CONTROL_BT_ON | REG_CONTROL_BT_RES_PU;
	outb(info->ctrl_reg, iobase + REG_CONTROL);

	/* Enable interrupt */
	outb(0xff, iobase + REG_INTERRUPT);
	info->ctrl_reg |= REG_CONTROL_INTERRUPT;
	outb(info->ctrl_reg, iobase + REG_CONTROL);

	if ((id & 0x0f) == 0x03) {
		/* Disable RTS */
		info->ctrl_reg |= REG_CONTROL_RTS;
		outb(info->ctrl_reg, iobase + REG_CONTROL);

		/* Set baud rate */
		info->ctrl_reg |= 0x03;
		outb(info->ctrl_reg, iobase + REG_CONTROL);

		/* Enable RTS */
		info->ctrl_reg &= ~REG_CONTROL_RTS;
		outb(info->ctrl_reg, iobase + REG_CONTROL);

		set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
		set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
		set_bit(XMIT_SENDING_READY, &(info->tx_state));
	}

	/* Start the RX buffers */
	outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
	outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);

	/* Signal that the hardware is ready */
	set_bit(CARD_READY, &(info->hw_state));

	/* Drop TX queue */
	skb_queue_purge(&(info->txq));

	/* Control the point at which RTS is enabled */
	outb((0x0f << RTS_LEVEL_SHIFT_BITS) | 1, iobase + REG_RX_CONTROL);

	/* Timeout before it is safe to send the first HCI packet */
	msleep(1250);

	/* Register HCI device */
	if (hci_register_dev(hdev) < 0) {
		BT_ERR("Can't register HCI device");
		info->hdev = NULL;
		hci_free_dev(hdev);
		return -ENODEV;
	}

	return 0;
}


int bluecard_close(bluecard_info_t *info)
{
	unsigned int iobase = info->link.io.BasePort1;
	struct hci_dev *hdev = info->hdev;

	if (!hdev)
		return -ENODEV;

	bluecard_hci_close(hdev);

	clear_bit(CARD_READY, &(info->hw_state));

	/* Reset card */
	info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
	outb(info->ctrl_reg, iobase + REG_CONTROL);

	/* Turn FPGA off */
	outb(0x80, iobase + 0x30);

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

	hci_free_dev(hdev);

	return 0;
}

dev_link_t *bluecard_attach(void)
{
	bluecard_info_t *info;
	client_reg_t client_reg;
	dev_link_t *link;
	int i, ret;

	/* Create new info device */
	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		return NULL;
	memset(info, 0, sizeof(*info));

	link = &info->link;
	link->priv = info;

	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
	link->io.NumPorts1 = 8;
	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
	link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;

	if (irq_list[0] == -1)
		link->irq.IRQInfo2 = irq_mask;
	else
		for (i = 0; i < 4; i++)
			link->irq.IRQInfo2 |= 1 << irq_list[i];

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

	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.Vcc = 50;
	link->conf.IntType = INT_MEMORY_AND_IO;

	/* Register with Card Services */
	link->next = dev_list;
	dev_list = link;
	client_reg.dev_info = &dev_info;
	client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
	client_reg.EventMask =
		CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
		CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
		CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
	client_reg.event_handler = &bluecard_event;
	client_reg.Version = 0x0210;
	client_reg.event_callback_args.client_data = link;

	ret = pcmcia_register_client(&link->handle, &client_reg);
	if (ret != CS_SUCCESS) {
		cs_error(link->handle, RegisterClient, ret);
		bluecard_detach(link);
		return NULL;
	}

	return link;
}


void bluecard_detach(dev_link_t *link)
{
	bluecard_info_t *info = link->priv;
	dev_link_t **linkp;
	int ret;

	/* Locate device structure */
	for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
		if (*linkp == link)
			break;

	if (*linkp == NULL)
		return;

	if (link->state & DEV_CONFIG)
		bluecard_release(link);

	if (link->handle) {
		ret = pcmcia_deregister_client(link->handle);
		if (ret != CS_SUCCESS)
			cs_error(link->handle, DeregisterClient, ret);
	}

	/* Unlink device structure, free bits */
	*linkp = link->next;

	kfree(info);
}


static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
{
	int i;

	i = pcmcia_get_first_tuple(handle, tuple);
	if (i != CS_SUCCESS)
		return CS_NO_MORE_ITEMS;

	i = pcmcia_get_tuple_data(handle, tuple);
	if (i != CS_SUCCESS)
		return i;

	return pcmcia_parse_tuple(handle, tuple, parse);
}

void bluecard_config(dev_link_t *link)
{
	client_handle_t handle = link->handle;
	bluecard_info_t *info = link->priv;
	tuple_t tuple;
	u_short buf[256];
	cisparse_t parse;
	config_info_t config;
	int i, n, last_ret, last_fn;

	tuple.TupleData = (cisdata_t *)buf;
	tuple.TupleOffset = 0;
	tuple.TupleDataMax = 255;
	tuple.Attributes = 0;

	/* Get configuration register information */
	tuple.DesiredTuple = CISTPL_CONFIG;
	last_ret = first_tuple(handle, &tuple, &parse);
	if (last_ret != CS_SUCCESS) {
		last_fn = ParseTuple;
		goto cs_failed;
	}
	link->conf.ConfigBase = parse.config.base;
	link->conf.Present = parse.config.rmask[0];

	/* Configure card */
	link->state |= DEV_CONFIG;
	i = pcmcia_get_configuration_info(handle, &config);
	link->conf.Vcc = config.Vcc;

	link->conf.ConfigIndex = 0x20;
	link->io.NumPorts1 = 64;
	link->io.IOAddrLines = 6;

	for (n = 0; n < 0x400; n += 0x40) {
		link->io.BasePort1 = n ^ 0x300;
		i = pcmcia_request_io(link->handle, &link->io);
		if (i == CS_SUCCESS)
			break;
	}

	if (i != CS_SUCCESS) {
		cs_error(link->handle, RequestIO, i);
		goto failed;
	}

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

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

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

	strcpy(info->node.dev_name, info->hdev->name);
	link->dev = &info->node;
	link->state &= ~DEV_CONFIG_PENDING;

	return;

cs_failed:
	cs_error(link->handle, last_fn, last_ret);

failed:
	bluecard_release(link);
}


void bluecard_release(dev_link_t *link)
{
	bluecard_info_t *info = link->priv;

	if (link->state & DEV_PRESENT)
		bluecard_close(info);

	del_timer(&(info->timer));

	link->dev = NULL;

	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
	pcmcia_release_irq(link->handle, &link->irq);

	link->state &= ~DEV_CONFIG;
}


int bluecard_event(event_t event, int priority, event_callback_args_t *args)
{
	dev_link_t *link = args->client_data;
	bluecard_info_t *info = link->priv;

	switch (event) {
	case CS_EVENT_CARD_REMOVAL:
		link->state &= ~DEV_PRESENT;
		if (link->state & DEV_CONFIG) {
			bluecard_close(info);
			bluecard_release(link);
		}
		break;
	case CS_EVENT_CARD_INSERTION:
		link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
		bluecard_config(link);
		break;
	case CS_EVENT_PM_SUSPEND:
		link->state |= DEV_SUSPEND;
		/* Fall through... */
	case CS_EVENT_RESET_PHYSICAL:
		if (link->state & DEV_CONFIG)
			pcmcia_release_configuration(link->handle);
		break;
	case CS_EVENT_PM_RESUME:
		link->state &= ~DEV_SUSPEND;
		/* Fall through... */
	case CS_EVENT_CARD_RESET:
		if (DEV_OK(link))
			pcmcia_request_configuration(link->handle, &link->conf);
		break;
	}

	return 0;
}

static struct pcmcia_driver bluecard_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "bluecard_cs",
	},
	.attach		= bluecard_attach,
	.detach		= bluecard_detach,
};

static int __init init_bluecard_cs(void)
{
	return pcmcia_register_driver(&bluecard_driver);
}


static void __exit exit_bluecard_cs(void)
{
	pcmcia_unregister_driver(&bluecard_driver);

	/* XXX: this really needs to move into generic code.. */
	while (dev_list != NULL)
		bluecard_detach(dev_list);
}

module_init(init_bluecard_cs);
module_exit(exit_bluecard_cs);