[deliverable/linux.git] / drivers / bluetooth / dtl1_cs.c

/*
 *
 *  A driver for Nokia Connectivity Card DTL-1 devices
 *
 *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation;
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing
 *  rights and limitations under the License.
 *
 *  The initial developer of the original code is David A. Hinds
 *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 *
 */

#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>

#include <linux/skbuff.h>
#include <linux/string.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/bitops.h>
#include <asm/io.h>

#include <pcmcia/cistpl.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>


/* ======================== Module parameters ======================== */


MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
MODULE_LICENSE("GPL");


/* ======================== Local structures ======================== */


struct dtl1_info {
	struct pcmcia_device *p_dev;

	struct hci_dev *hdev;

	spinlock_t lock;		/* For serializing operations */

	unsigned long flowmask;		/* HCI flow mask */
	int ri_latch;

	struct sk_buff_head txq;
	unsigned long tx_state;

	unsigned long rx_state;
	unsigned long rx_count;
	struct sk_buff *rx_skb;
};


static int dtl1_config(struct pcmcia_device *link);


/* Transmit states  */
#define XMIT_SENDING  1
#define XMIT_WAKEUP   2
#define XMIT_WAITING  8

/* Receiver States */
#define RECV_WAIT_NSH   0
#define RECV_WAIT_DATA  1


struct nsh {
	u8 type;
	u8 zero;
	u16 len;
} __packed;	/* Nokia Specific Header */

#define NSHL  4				/* Nokia Specific Header Length */


/* ======================== Interrupt handling ======================== */


static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
{
	int actual = 0;

	/* Tx FIFO should be empty */
	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
		return 0;

	/* Fill FIFO with current frame */
	while ((fifo_size-- > 0) && (actual < len)) {
		/* Transmit next byte */
		outb(buf[actual], iobase + UART_TX);
		actual++;
	}

	return actual;
}


static void dtl1_write_wakeup(struct dtl1_info *info)
{
	if (!info) {
		BT_ERR("Unknown device");
		return;
	}

	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
		set_bit(XMIT_WAKEUP, &(info->tx_state));
		return;
	}

	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
		set_bit(XMIT_WAKEUP, &(info->tx_state));
		return;
	}

	do {
		unsigned int iobase = info->p_dev->resource[0]->start;
		register struct sk_buff *skb;
		int len;

		clear_bit(XMIT_WAKEUP, &(info->tx_state));

		if (!pcmcia_dev_present(info->p_dev))
			return;

		skb = skb_dequeue(&(info->txq));
		if (!skb)
			break;

		/* Send frame */
		len = dtl1_write(iobase, 32, skb->data, skb->len);

		if (len == skb->len) {
			set_bit(XMIT_WAITING, &(info->tx_state));
			kfree_skb(skb);
		} else {
			skb_pull(skb, len);
			skb_queue_head(&(info->txq), skb);
		}

		info->hdev->stat.byte_tx += len;

	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));

	clear_bit(XMIT_SENDING, &(info->tx_state));
}


static void dtl1_control(struct dtl1_info *info, struct sk_buff *skb)
{
	u8 flowmask = *(u8 *)skb->data;
	int i;

	printk(KERN_INFO "Bluetooth: Nokia control data =");
	for (i = 0; i < skb->len; i++)
		printk(" %02x", skb->data[i]);

	printk("\n");

	/* transition to active state */
	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
		clear_bit(XMIT_WAITING, &(info->tx_state));
		dtl1_write_wakeup(info);
	}

	info->flowmask = flowmask;

	kfree_skb(skb);
}


static void dtl1_receive(struct dtl1_info *info)
{
	unsigned int iobase;
	struct nsh *nsh;
	int boguscount = 0;

	if (!info) {
		BT_ERR("Unknown device");
		return;
	}

	iobase = info->p_dev->resource[0]->start;

	do {
		info->hdev->stat.byte_rx++;

		/* Allocate packet */
		if (info->rx_skb == NULL) {
			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
			if (!info->rx_skb) {
				BT_ERR("Can't allocate mem for new packet");
				info->rx_state = RECV_WAIT_NSH;
				info->rx_count = NSHL;
				return;
			}
		}

		*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
		nsh = (struct nsh *)info->rx_skb->data;

		info->rx_count--;

		if (info->rx_count == 0) {

			switch (info->rx_state) {
			case RECV_WAIT_NSH:
				info->rx_state = RECV_WAIT_DATA;
				info->rx_count = nsh->len + (nsh->len & 0x0001);
				break;
			case RECV_WAIT_DATA:
				bt_cb(info->rx_skb)->pkt_type = nsh->type;

				/* remove PAD byte if it exists */
				if (nsh->len & 0x0001) {
					info->rx_skb->tail--;
					info->rx_skb->len--;
				}

				/* remove NSH */
				skb_pull(info->rx_skb, NSHL);

				switch (bt_cb(info->rx_skb)->pkt_type) {
				case 0x80:
					/* control data for the Nokia Card */
					dtl1_control(info, info->rx_skb);
					break;
				case 0x82:
				case 0x83:
				case 0x84:
					/* send frame to the HCI layer */
					bt_cb(info->rx_skb)->pkt_type &= 0x0f;
					hci_recv_frame(info->hdev, info->rx_skb);
					break;
				default:
					/* unknown packet */
					BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
					kfree_skb(info->rx_skb);
					break;
				}

				info->rx_state = RECV_WAIT_NSH;
				info->rx_count = NSHL;
				info->rx_skb = NULL;
				break;
			}

		}

		/* Make sure we don't stay here too long */
		if (boguscount++ > 32)
			break;

	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
}


static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
{
	struct dtl1_info *info = dev_inst;
	unsigned int iobase;
	unsigned char msr;
	int boguscount = 0;
	int iir, lsr;
	irqreturn_t r = IRQ_NONE;

	if (!info || !info->hdev)
		/* our irq handler is shared */
		return IRQ_NONE;

	iobase = info->p_dev->resource[0]->start;

	spin_lock(&(info->lock));

	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	while (iir) {

		r = IRQ_HANDLED;
		/* Clear interrupt */
		lsr = inb(iobase + UART_LSR);

		switch (iir) {
		case UART_IIR_RLSI:
			BT_ERR("RLSI");
			break;
		case UART_IIR_RDI:
			/* Receive interrupt */
			dtl1_receive(info);
			break;
		case UART_IIR_THRI:
			if (lsr & UART_LSR_THRE) {
				/* Transmitter ready for data */
				dtl1_write_wakeup(info);
			}
			break;
		default:
			BT_ERR("Unhandled IIR=%#x", iir);
			break;
		}

		/* Make sure we don't stay here too long */
		if (boguscount++ > 100)
			break;

		iir = inb(iobase + UART_IIR) & UART_IIR_ID;

	}

	msr = inb(iobase + UART_MSR);

	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
		info->ri_latch = msr & UART_MSR_RI;
		clear_bit(XMIT_WAITING, &(info->tx_state));
		dtl1_write_wakeup(info);
		r = IRQ_HANDLED;
	}

	spin_unlock(&(info->lock));

	return r;
}


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


static int dtl1_hci_open(struct hci_dev *hdev)
{
	return 0;
}


static int dtl1_hci_flush(struct hci_dev *hdev)
{
	struct dtl1_info *info = hci_get_drvdata(hdev);

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

	return 0;
}


static int dtl1_hci_close(struct hci_dev *hdev)
{
	dtl1_hci_flush(hdev);

	return 0;
}


static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
{
	struct dtl1_info *info = hci_get_drvdata(hdev);
	struct sk_buff *s;
	struct nsh nsh;

	switch (bt_cb(skb)->pkt_type) {
	case HCI_COMMAND_PKT:
		hdev->stat.cmd_tx++;
		nsh.type = 0x81;
		break;
	case HCI_ACLDATA_PKT:
		hdev->stat.acl_tx++;
		nsh.type = 0x82;
		break;
	case HCI_SCODATA_PKT:
		hdev->stat.sco_tx++;
		nsh.type = 0x83;
		break;
	default:
		return -EILSEQ;
	}

	nsh.zero = 0;
	nsh.len = skb->len;

	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
	if (!s)
		return -ENOMEM;

	skb_reserve(s, NSHL);
	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
	if (skb->len & 0x0001)
		*skb_put(s, 1) = 0;	/* PAD */

	/* Prepend skb with Nokia frame header and queue */
	memcpy(skb_push(s, NSHL), &nsh, NSHL);
	skb_queue_tail(&(info->txq), s);

	dtl1_write_wakeup(info);

	kfree_skb(skb);

	return 0;
}


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


static int dtl1_open(struct dtl1_info *info)
{
	unsigned long flags;
	unsigned int iobase = info->p_dev->resource[0]->start;
	struct hci_dev *hdev;

	spin_lock_init(&(info->lock));

	skb_queue_head_init(&(info->txq));

	info->rx_state = RECV_WAIT_NSH;
	info->rx_count = NSHL;
	info->rx_skb = NULL;

	set_bit(XMIT_WAITING, &(info->tx_state));

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

	info->hdev = hdev;

	hdev->bus = HCI_PCCARD;
	hci_set_drvdata(hdev, info);
	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);

	hdev->open  = dtl1_hci_open;
	hdev->close = dtl1_hci_close;
	hdev->flush = dtl1_hci_flush;
	hdev->send  = dtl1_hci_send_frame;

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

	/* Reset UART */
	outb(0, iobase + UART_MCR);

	/* Turn off interrupts */
	outb(0, iobase + UART_IER);

	/* Initialize UART */
	outb(UART_LCR_WLEN8, iobase + UART_LCR);	/* Reset DLAB */
	outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);

	info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
				& UART_MSR_RI;

	/* Turn on interrupts */
	outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);

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

	/* Timeout before it is safe to send the first HCI packet */
	msleep(2000);

	/* 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;
}


static int dtl1_close(struct dtl1_info *info)
{
	unsigned long flags;
	unsigned int iobase = info->p_dev->resource[0]->start;
	struct hci_dev *hdev = info->hdev;

	if (!hdev)
		return -ENODEV;

	dtl1_hci_close(hdev);

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

	/* Reset UART */
	outb(0, iobase + UART_MCR);

	/* Turn off interrupts */
	outb(0, iobase + UART_IER);

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

	hci_unregister_dev(hdev);
	hci_free_dev(hdev);

	return 0;
}

static int dtl1_probe(struct pcmcia_device *link)
{
	struct dtl1_info *info;

	/* Create new info device */
	info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

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

	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;

	return dtl1_config(link);
}


static void dtl1_detach(struct pcmcia_device *link)
{
	struct dtl1_info *info = link->priv;

	dtl1_close(info);
	pcmcia_disable_device(link);
}

static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
{
	if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
		return -ENODEV;

	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;

	return pcmcia_request_io(p_dev);
}

static int dtl1_config(struct pcmcia_device *link)
{
	struct dtl1_info *info = link->priv;
	int ret;

	/* Look for a generic full-sized window */
	link->resource[0]->end = 8;
	ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
	if (ret)
		goto failed;

	ret = pcmcia_request_irq(link, dtl1_interrupt);
	if (ret)
		goto failed;

	ret = pcmcia_enable_device(link);
	if (ret)
		goto failed;

	ret = dtl1_open(info);
	if (ret)
		goto failed;

	return 0;

failed:
	dtl1_detach(link);
	return ret;
}

static const struct pcmcia_device_id dtl1_ids[] = {
	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
	PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
	PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);

static struct pcmcia_driver dtl1_driver = {
	.owner		= THIS_MODULE,
	.name		= "dtl1_cs",
	.probe		= dtl1_probe,
	.remove		= dtl1_detach,
	.id_table	= dtl1_ids,
};
module_pcmcia_driver(dtl1_driver);
Commit	Line	Data
1da177e4 LT	1	/*
	2	*
	3	* A driver for Nokia Connectivity Card DTL-1 devices
	4	*
	5	* Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
	6	*
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation;
	11	*
	12	* Software distributed under the License is distributed on an "AS
	13	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
	14	* implied. See the License for the specific language governing
	15	* rights and limitations under the License.
	16	*
	17	* The initial developer of the original code is David A. Hinds
	18	* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
	19	* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
	20	*
	21	*/
	22
1da177e4 LT	23	#include <linux/module.h>
	24
	25	#include <linux/kernel.h>
	26	#include <linux/init.h>
	27	#include <linux/slab.h>
	28	#include <linux/types.h>
1da177e4 LT	29	#include <linux/delay.h>
	30	#include <linux/errno.h>
	31	#include <linux/ptrace.h>
	32	#include <linux/ioport.h>
	33	#include <linux/spinlock.h>
	34	#include <linux/moduleparam.h>
	35
	36	#include <linux/skbuff.h>
	37	#include <linux/string.h>
	38	#include <linux/serial.h>
	39	#include <linux/serial_reg.h>
	40	#include <linux/bitops.h>
1da177e4 LT	41	#include <asm/io.h>
1da177e4 LT	42
1da177e4 LT	43	#include <pcmcia/cistpl.h>
	44	#include <pcmcia/ciscode.h>
	45	#include <pcmcia/ds.h>
	46	#include <pcmcia/cisreg.h>
	47
	48	#include <net/bluetooth/bluetooth.h>
	49	#include <net/bluetooth/hci_core.h>
	50
	51
	52
	53	/* ======================== Module parameters ======================== */
	54
	55
	56	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	57	MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
	58	MODULE_LICENSE("GPL");
	59
	60
	61
	62	/* ======================== Local structures ======================== */
	63
	64
66f4e0e4	65	struct dtl1_info {
fd238232	66	struct pcmcia_device *p_dev;
1da177e4 LT	67
	68	struct hci_dev *hdev;
	69
	70	spinlock_t lock; /* For serializing operations */
	71
	72	unsigned long flowmask; /* HCI flow mask */
	73	int ri_latch;
	74
	75	struct sk_buff_head txq;
	76	unsigned long tx_state;
	77
	78	unsigned long rx_state;
	79	unsigned long rx_count;
	80	struct sk_buff *rx_skb;
66f4e0e4	81	};
1da177e4 LT	82
1da177e4 LT	83
15b99ac1	84	static int dtl1_config(struct pcmcia_device *link);
1da177e4	85
1da177e4 LT	86
	87	/* Transmit states */
	88	#define XMIT_SENDING 1
	89	#define XMIT_WAKEUP 2
	90	#define XMIT_WAITING 8
	91
	92	/* Receiver States */
	93	#define RECV_WAIT_NSH 0
	94	#define RECV_WAIT_DATA 1
	95
	96
66f4e0e4	97	struct nsh {
1da177e4 LT	98	u8 type;
	99	u8 zero;
	100	u16 len;
66f4e0e4	101	} __packed; /* Nokia Specific Header */
1da177e4 LT	102
	103	#define NSHL 4 /* Nokia Specific Header Length */
	104
	105
	106
	107	/* ======================== Interrupt handling ======================== */
	108
	109
	110	static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
	111	{
	112	int actual = 0;
	113
	114	/* Tx FIFO should be empty */
	115	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
	116	return 0;
	117
	118	/* Fill FIFO with current frame */
	119	while ((fifo_size-- > 0) && (actual < len)) {
	120	/* Transmit next byte */
	121	outb(buf[actual], iobase + UART_TX);
	122	actual++;
	123	}
	124
	125	return actual;
	126	}
	127
	128
66f4e0e4	129	static void dtl1_write_wakeup(struct dtl1_info *info)
1da177e4 LT	130	{
	131	if (!info) {
	132	BT_ERR("Unknown device");
	133	return;
	134	}
	135
	136	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
	137	set_bit(XMIT_WAKEUP, &(info->tx_state));
	138	return;
	139	}
	140
	141	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
	142	set_bit(XMIT_WAKEUP, &(info->tx_state));
	143	return;
	144	}
	145
	146	do {
fc5fef61	147	unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4	148	register struct sk_buff *skb;
fc5fef61	149	int len;
1da177e4 LT	150
	151	clear_bit(XMIT_WAKEUP, &(info->tx_state));
	152
e2d40963	153	if (!pcmcia_dev_present(info->p_dev))
1da177e4 LT	154	return;
1da177e4 LT	155
a08b15e6 VI	156	skb = skb_dequeue(&(info->txq));
a08b15e6 VI	157	if (!skb)
1da177e4 LT	158	break;
	159
	160	/* Send frame */
	161	len = dtl1_write(iobase, 32, skb->data, skb->len);
	162
	163	if (len == skb->len) {
	164	set_bit(XMIT_WAITING, &(info->tx_state));
	165	kfree_skb(skb);
	166	} else {
	167	skb_pull(skb, len);
	168	skb_queue_head(&(info->txq), skb);
	169	}
	170
	171	info->hdev->stat.byte_tx += len;
	172
	173	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
	174
	175	clear_bit(XMIT_SENDING, &(info->tx_state));
	176	}
	177
	178
66f4e0e4	179	static void dtl1_control(struct dtl1_info info, struct sk_buff skb)
1da177e4 LT	180	{
	181	u8 flowmask = (u8 )skb->data;
	182	int i;
	183
	184	printk(KERN_INFO "Bluetooth: Nokia control data =");
fac5e5b9	185	for (i = 0; i < skb->len; i++)
1da177e4	186	printk(" %02x", skb->data[i]);
fac5e5b9	187
1da177e4 LT	188	printk("\n");
	189
	190	/* transition to active state */
	191	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
	192	clear_bit(XMIT_WAITING, &(info->tx_state));
	193	dtl1_write_wakeup(info);
	194	}
	195
	196	info->flowmask = flowmask;
	197
	198	kfree_skb(skb);
	199	}
	200
	201
66f4e0e4	202	static void dtl1_receive(struct dtl1_info *info)
1da177e4 LT	203	{
1da177e4 LT	204	unsigned int iobase;
66f4e0e4	205	struct nsh *nsh;
1da177e4 LT	206	int boguscount = 0;
	207
	208	if (!info) {
	209	BT_ERR("Unknown device");
	210	return;
	211	}
	212
9a017a91	213	iobase = info->p_dev->resource[0]->start;
1da177e4 LT	214
	215	do {
	216	info->hdev->stat.byte_rx++;
	217
	218	/* Allocate packet */
a08b15e6 VI	219	if (info->rx_skb == NULL) {
	220	info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
	221	if (!info->rx_skb) {
1da177e4 LT	222	BT_ERR("Can't allocate mem for new packet");
	223	info->rx_state = RECV_WAIT_NSH;
	224	info->rx_count = NSHL;
	225	return;
	226	}
a08b15e6	227	}
1da177e4 LT	228
1da177e4 LT	229	*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
66f4e0e4	230	nsh = (struct nsh *)info->rx_skb->data;
1da177e4 LT	231
	232	info->rx_count--;
	233
	234	if (info->rx_count == 0) {
	235
	236	switch (info->rx_state) {
	237	case RECV_WAIT_NSH:
	238	info->rx_state = RECV_WAIT_DATA;
	239	info->rx_count = nsh->len + (nsh->len & 0x0001);
	240	break;
	241	case RECV_WAIT_DATA:
0d48d939	242	bt_cb(info->rx_skb)->pkt_type = nsh->type;
1da177e4 LT	243
	244	/* remove PAD byte if it exists */
	245	if (nsh->len & 0x0001) {
	246	info->rx_skb->tail--;
	247	info->rx_skb->len--;
	248	}
	249
	250	/* remove NSH */
	251	skb_pull(info->rx_skb, NSHL);
	252
0d48d939	253	switch (bt_cb(info->rx_skb)->pkt_type) {
1da177e4 LT	254	case 0x80:
	255	/* control data for the Nokia Card */
	256	dtl1_control(info, info->rx_skb);
	257	break;
	258	case 0x82:
	259	case 0x83:
	260	case 0x84:
	261	/* send frame to the HCI layer */
0d48d939	262	bt_cb(info->rx_skb)->pkt_type &= 0x0f;
e1a26170	263	hci_recv_frame(info->hdev, info->rx_skb);
1da177e4 LT	264	break;
	265	default:
	266	/* unknown packet */
0d48d939	267	BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
1da177e4 LT	268	kfree_skb(info->rx_skb);
	269	break;
	270	}
	271
	272	info->rx_state = RECV_WAIT_NSH;
	273	info->rx_count = NSHL;
	274	info->rx_skb = NULL;
	275	break;
	276	}
	277
	278	}
	279
	280	/* Make sure we don't stay here too long */
	281	if (boguscount++ > 32)
	282	break;
	283
	284	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
	285	}
	286
	287
7d12e780	288	static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
1da177e4	289	{
66f4e0e4	290	struct dtl1_info *info = dev_inst;
1da177e4 LT	291	unsigned int iobase;
	292	unsigned char msr;
	293	int boguscount = 0;
	294	int iir, lsr;
aafcf998	295	irqreturn_t r = IRQ_NONE;
1da177e4	296
7427847d MF	297	if (!info \|\| !info->hdev)
	298	/* our irq handler is shared */
	299	return IRQ_NONE;
1da177e4	300
9a017a91	301	iobase = info->p_dev->resource[0]->start;
1da177e4 LT	302
	303	spin_lock(&(info->lock));
	304
	305	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	306	while (iir) {
	307
aafcf998	308	r = IRQ_HANDLED;
1da177e4 LT	309	/* Clear interrupt */
	310	lsr = inb(iobase + UART_LSR);
	311
	312	switch (iir) {
	313	case UART_IIR_RLSI:
	314	BT_ERR("RLSI");
	315	break;
	316	case UART_IIR_RDI:
	317	/* Receive interrupt */
	318	dtl1_receive(info);
	319	break;
	320	case UART_IIR_THRI:
	321	if (lsr & UART_LSR_THRE) {
	322	/* Transmitter ready for data */
	323	dtl1_write_wakeup(info);
	324	}
	325	break;
	326	default:
	327	BT_ERR("Unhandled IIR=%#x", iir);
	328	break;
	329	}
	330
	331	/* Make sure we don't stay here too long */
	332	if (boguscount++ > 100)
	333	break;
	334
	335	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	336
	337	}
	338
	339	msr = inb(iobase + UART_MSR);
	340
	341	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
	342	info->ri_latch = msr & UART_MSR_RI;
	343	clear_bit(XMIT_WAITING, &(info->tx_state));
	344	dtl1_write_wakeup(info);
aafcf998	345	r = IRQ_HANDLED;
1da177e4 LT	346	}
	347
	348	spin_unlock(&(info->lock));
	349
aafcf998	350	return r;
1da177e4 LT	351	}
	352
	353
	354
	355	/* ======================== HCI interface ======================== */
	356
	357
	358	static int dtl1_hci_open(struct hci_dev *hdev)
	359	{
1da177e4 LT	360	return 0;
	361	}
	362
	363
	364	static int dtl1_hci_flush(struct hci_dev *hdev)
	365	{
66f4e0e4	366	struct dtl1_info *info = hci_get_drvdata(hdev);
1da177e4 LT	367
	368	/* Drop TX queue */
	369	skb_queue_purge(&(info->txq));
	370
	371	return 0;
	372	}
	373
	374
	375	static int dtl1_hci_close(struct hci_dev *hdev)
	376	{
1da177e4 LT	377	dtl1_hci_flush(hdev);
	378
	379	return 0;
	380	}
	381
	382
7bd8f09f	383	static int dtl1_hci_send_frame(struct hci_dev hdev, struct sk_buff skb)
1da177e4	384	{
66f4e0e4	385	struct dtl1_info *info = hci_get_drvdata(hdev);
1da177e4	386	struct sk_buff *s;
66f4e0e4	387	struct nsh nsh;
1da177e4	388
0d48d939	389	switch (bt_cb(skb)->pkt_type) {
1da177e4 LT	390	case HCI_COMMAND_PKT:
	391	hdev->stat.cmd_tx++;
	392	nsh.type = 0x81;
	393	break;
	394	case HCI_ACLDATA_PKT:
	395	hdev->stat.acl_tx++;
	396	nsh.type = 0x82;
	397	break;
	398	case HCI_SCODATA_PKT:
	399	hdev->stat.sco_tx++;
	400	nsh.type = 0x83;
	401	break;
3c4bdc4b MH	402	default:
3c4bdc4b MH	403	return -EILSEQ;
20a7e25f	404	}
1da177e4 LT	405
	406	nsh.zero = 0;
	407	nsh.len = skb->len;
	408
	409	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
57136ca6 JJ	410	if (!s)
	411	return -ENOMEM;
	412
1da177e4	413	skb_reserve(s, NSHL);
d626f62b	414	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
1da177e4 LT	415	if (skb->len & 0x0001)
	416	skb_put(s, 1) = 0; / PAD */
	417
	418	/* Prepend skb with Nokia frame header and queue */
	419	memcpy(skb_push(s, NSHL), &nsh, NSHL);
	420	skb_queue_tail(&(info->txq), s);
	421
	422	dtl1_write_wakeup(info);
	423
	424	kfree_skb(skb);
	425
	426	return 0;
	427	}
	428
	429
1da177e4 LT	430
	431	/* ======================== Card services HCI interaction ======================== */
	432
	433
66f4e0e4	434	static int dtl1_open(struct dtl1_info *info)
1da177e4 LT	435	{
1da177e4 LT	436	unsigned long flags;
9a017a91	437	unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4 LT	438	struct hci_dev *hdev;
	439
	440	spin_lock_init(&(info->lock));
	441
	442	skb_queue_head_init(&(info->txq));
	443
	444	info->rx_state = RECV_WAIT_NSH;
	445	info->rx_count = NSHL;
	446	info->rx_skb = NULL;
	447
	448	set_bit(XMIT_WAITING, &(info->tx_state));
	449
	450	/* Initialize HCI device */
	451	hdev = hci_alloc_dev();
	452	if (!hdev) {
	453	BT_ERR("Can't allocate HCI device");
	454	return -ENOMEM;
	455	}
	456
	457	info->hdev = hdev;
	458
c13854ce	459	hdev->bus = HCI_PCCARD;
155961e8	460	hci_set_drvdata(hdev, info);
27d35284	461	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
1da177e4	462
3c728842 MH	463	hdev->open = dtl1_hci_open;
	464	hdev->close = dtl1_hci_close;
	465	hdev->flush = dtl1_hci_flush;
	466	hdev->send = dtl1_hci_send_frame;
1da177e4	467
1da177e4 LT	468	spin_lock_irqsave(&(info->lock), flags);
	469
	470	/* Reset UART */
	471	outb(0, iobase + UART_MCR);
	472
	473	/* Turn off interrupts */
	474	outb(0, iobase + UART_IER);
	475
	476	/* Initialize UART */
	477	outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
	478	outb((UART_MCR_DTR \| UART_MCR_RTS \| UART_MCR_OUT2), iobase + UART_MCR);
	479
9a017a91 DB	480	info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
9a017a91 DB	481	& UART_MSR_RI;
1da177e4 LT	482
	483	/* Turn on interrupts */
	484	outb(UART_IER_RLSI \| UART_IER_RDI \| UART_IER_THRI, iobase + UART_IER);
	485
	486	spin_unlock_irqrestore(&(info->lock), flags);
	487
	488	/* Timeout before it is safe to send the first HCI packet */
	489	msleep(2000);
	490
	491	/* Register HCI device */
	492	if (hci_register_dev(hdev) < 0) {
	493	BT_ERR("Can't register HCI device");
	494	info->hdev = NULL;
	495	hci_free_dev(hdev);
	496	return -ENODEV;
	497	}
	498
	499	return 0;
	500	}
	501
	502
66f4e0e4	503	static int dtl1_close(struct dtl1_info *info)
1da177e4 LT	504	{
1da177e4 LT	505	unsigned long flags;
9a017a91	506	unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4 LT	507	struct hci_dev *hdev = info->hdev;
	508
	509	if (!hdev)
	510	return -ENODEV;
	511
	512	dtl1_hci_close(hdev);
	513
	514	spin_lock_irqsave(&(info->lock), flags);
	515
	516	/* Reset UART */
	517	outb(0, iobase + UART_MCR);
	518
	519	/* Turn off interrupts */
	520	outb(0, iobase + UART_IER);
	521
	522	spin_unlock_irqrestore(&(info->lock), flags);
	523
13ea4015	524	hci_unregister_dev(hdev);
1da177e4 LT	525	hci_free_dev(hdev);
	526
	527	return 0;
	528	}
	529
15b99ac1	530	static int dtl1_probe(struct pcmcia_device *link)
1da177e4	531	{
66f4e0e4	532	struct dtl1_info *info;
1da177e4 LT	533
1da177e4 LT	534	/* Create new info device */
cd7cf78e	535	info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
1da177e4	536	if (!info)
f8cfa618	537	return -ENOMEM;
1da177e4	538
fba395ee	539	info->p_dev = link;
1da177e4 LT	540	link->priv = info;
1da177e4 LT	541
00990e7c	542	link->config_flags \|= CONF_ENABLE_IRQ \| CONF_AUTO_SET_IO;
1da177e4	543
15b99ac1	544	return dtl1_config(link);
1da177e4 LT	545	}
	546
	547
fba395ee	548	static void dtl1_detach(struct pcmcia_device *link)
1da177e4	549	{
66f4e0e4	550	struct dtl1_info *info = link->priv;
1da177e4	551
5a0b8159 DH	552	dtl1_close(info);
5a0b8159 DH	553	pcmcia_disable_device(link);
1da177e4 LT	554	}
1da177e4 LT	555
00990e7c	556	static int dtl1_confcheck(struct pcmcia_device p_dev, void priv_data)
1da177e4	557	{
00990e7c	558	if ((p_dev->resource[1]->end) \|\| (p_dev->resource[1]->end < 8))
90abdc3b DB	559	return -ENODEV;
90abdc3b DB	560
00990e7c DB	561	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
	562	p_dev->resource[0]->flags \|= IO_DATA_PATH_WIDTH_8;
	563
90abdc3b	564	return pcmcia_request_io(p_dev);
1da177e4 LT	565	}
1da177e4 LT	566
15b99ac1	567	static int dtl1_config(struct pcmcia_device *link)
1da177e4	568	{
66f4e0e4	569	struct dtl1_info *info = link->priv;
46afeded	570	int ret;
1da177e4	571
1da177e4	572	/* Look for a generic full-sized window */
90abdc3b	573	link->resource[0]->end = 8;
46afeded DN	574	ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
46afeded DN	575	if (ret)
1da177e4	576	goto failed;
1da177e4	577
46afeded DN	578	ret = pcmcia_request_irq(link, dtl1_interrupt);
46afeded DN	579	if (ret)
eb14120f	580	goto failed;
1da177e4	581
46afeded DN	582	ret = pcmcia_enable_device(link);
46afeded DN	583	if (ret)
1da177e4	584	goto failed;
1da177e4	585
46afeded DN	586	ret = dtl1_open(info);
46afeded DN	587	if (ret)
1da177e4 LT	588	goto failed;
1da177e4 LT	589
15b99ac1	590	return 0;
1da177e4	591
1da177e4	592	failed:
5a0b8159	593	dtl1_detach(link);
46afeded	594	return ret;
1da177e4 LT	595	}
1da177e4 LT	596
25f8f54f	597	static const struct pcmcia_device_id dtl1_ids[] = {
88eca2e5	598	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
8602b4fe	599	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
88eca2e5	600	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
725a6abf	601	PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
88eca2e5 DB	602	PCMCIA_DEVICE_NULL
	603	};
	604	MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
	605
1da177e4 LT	606	static struct pcmcia_driver dtl1_driver = {
1da177e4 LT	607	.owner = THIS_MODULE,
2e9b981a	608	.name = "dtl1_cs",
15b99ac1	609	.probe = dtl1_probe,
cc3b4866	610	.remove = dtl1_detach,
88eca2e5	611	.id_table = dtl1_ids,
1da177e4	612	};
e0c005f4	613	module_pcmcia_driver(dtl1_driver);