[net-next-2.6.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/system.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 ======================== */


typedef struct dtl1_info_t {
	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;
} dtl1_info_t;


static int dtl1_config(struct pcmcia_device *link);
static void dtl1_release(struct pcmcia_device *link);

static void dtl1_detach(struct pcmcia_device *p_dev);


/* 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


typedef struct {
	u8 type;
	u8 zero;
	u16 len;
} __packed nsh_t;	/* 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(dtl1_info_t *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 {
		register unsigned int iobase = info->p_dev->resource[0]->start;
		register struct sk_buff *skb;
		register int len;

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

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

		if (!(skb = skb_dequeue(&(info->txq))))
			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(dtl1_info_t *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(dtl1_info_t *info)
{
	unsigned int iobase;
	nsh_t *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)
			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
				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 = (nsh_t *)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 */
					info->rx_skb->dev = (void *) info->hdev;
					bt_cb(info->rx_skb)->pkt_type &= 0x0f;
					hci_recv_frame(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)
{
	dtl1_info_t *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)
{
	set_bit(HCI_RUNNING, &(hdev->flags));

	return 0;
}


static int dtl1_hci_flush(struct hci_dev *hdev)
{
	dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);

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

	return 0;
}


static int dtl1_hci_close(struct hci_dev *hdev)
{
	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
		return 0;

	dtl1_hci_flush(hdev);

	return 0;
}


static int dtl1_hci_send_frame(struct sk_buff *skb)
{
	dtl1_info_t *info;
	struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
	struct sk_buff *s;
	nsh_t nsh;

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

	info = (dtl1_info_t *)(hdev->driver_data);

	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;
}


static void dtl1_hci_destruct(struct hci_dev *hdev)
{
}


static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd,  unsigned long arg)
{
	return -ENOIOCTLCMD;
}


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


static int dtl1_open(dtl1_info_t *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;
	hdev->driver_data = 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;
	hdev->destruct = dtl1_hci_destruct;
	hdev->ioctl    = dtl1_hci_ioctl;

	hdev->owner = THIS_MODULE;

	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(dtl1_info_t *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);

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

	hci_free_dev(hdev);

	return 0;
}

static int dtl1_probe(struct pcmcia_device *link)
{
	dtl1_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->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;

	return dtl1_config(link);
}


static void dtl1_detach(struct pcmcia_device *link)
{
	dtl1_info_t *info = link->priv;

	dtl1_release(link);

	kfree(info);
}

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)
{
	dtl1_info_t *info = link->priv;
	int i;

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

	i = pcmcia_request_irq(link, dtl1_interrupt);
	if (i != 0)
		goto failed;

	i = pcmcia_enable_device(link);
	if (i != 0)
		goto failed;

	if (dtl1_open(info) != 0)
		goto failed;

	return 0;

failed:
	dtl1_release(link);
	return -ENODEV;
}


static void dtl1_release(struct pcmcia_device *link)
{
	dtl1_info_t *info = link->priv;

	dtl1_close(info);

	pcmcia_disable_device(link);
}


static 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,
};

static int __init init_dtl1_cs(void)
{
	return pcmcia_register_driver(&dtl1_driver);
}


static void __exit exit_dtl1_cs(void)
{
	pcmcia_unregister_driver(&dtl1_driver);
}

module_init(init_dtl1_cs);
module_exit(exit_dtl1_cs);
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>
	41	#include <asm/system.h>
	42	#include <asm/io.h>
	43
1da177e4 LT	44	#include <pcmcia/cistpl.h>
	45	#include <pcmcia/ciscode.h>
	46	#include <pcmcia/ds.h>
	47	#include <pcmcia/cisreg.h>
	48
	49	#include <net/bluetooth/bluetooth.h>
	50	#include <net/bluetooth/hci_core.h>
	51
	52
	53
	54	/* ======================== Module parameters ======================== */
	55
	56
	57	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	58	MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
	59	MODULE_LICENSE("GPL");
	60
	61
	62
	63	/* ======================== Local structures ======================== */
	64
	65
	66	typedef struct dtl1_info_t {
fd238232	67	struct pcmcia_device *p_dev;
1da177e4 LT	68
	69	struct hci_dev *hdev;
	70
	71	spinlock_t lock; /* For serializing operations */
	72
	73	unsigned long flowmask; /* HCI flow mask */
	74	int ri_latch;
	75
	76	struct sk_buff_head txq;
	77	unsigned long tx_state;
	78
	79	unsigned long rx_state;
	80	unsigned long rx_count;
	81	struct sk_buff *rx_skb;
	82	} dtl1_info_t;
	83
	84
15b99ac1	85	static int dtl1_config(struct pcmcia_device *link);
fba395ee	86	static void dtl1_release(struct pcmcia_device *link);
1da177e4	87
cc3b4866	88	static void dtl1_detach(struct pcmcia_device *p_dev);
1da177e4	89
1da177e4 LT	90
	91	/* Transmit states */
	92	#define XMIT_SENDING 1
	93	#define XMIT_WAKEUP 2
	94	#define XMIT_WAITING 8
	95
	96	/* Receiver States */
	97	#define RECV_WAIT_NSH 0
	98	#define RECV_WAIT_DATA 1
	99
	100
	101	typedef struct {
	102	u8 type;
	103	u8 zero;
	104	u16 len;
81ca405a	105	} __packed nsh_t; /* Nokia Specific Header */
1da177e4 LT	106
	107	#define NSHL 4 /* Nokia Specific Header Length */
	108
	109
	110
	111	/* ======================== Interrupt handling ======================== */
	112
	113
	114	static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
	115	{
	116	int actual = 0;
	117
	118	/* Tx FIFO should be empty */
	119	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
	120	return 0;
	121
	122	/* Fill FIFO with current frame */
	123	while ((fifo_size-- > 0) && (actual < len)) {
	124	/* Transmit next byte */
	125	outb(buf[actual], iobase + UART_TX);
	126	actual++;
	127	}
	128
	129	return actual;
	130	}
	131
	132
	133	static void dtl1_write_wakeup(dtl1_info_t *info)
	134	{
	135	if (!info) {
	136	BT_ERR("Unknown device");
	137	return;
	138	}
	139
	140	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
	141	set_bit(XMIT_WAKEUP, &(info->tx_state));
	142	return;
	143	}
	144
	145	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
	146	set_bit(XMIT_WAKEUP, &(info->tx_state));
	147	return;
	148	}
	149
	150	do {
9a017a91	151	register unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4 LT	152	register struct sk_buff *skb;
	153	register int len;
	154
	155	clear_bit(XMIT_WAKEUP, &(info->tx_state));
	156
e2d40963	157	if (!pcmcia_dev_present(info->p_dev))
1da177e4 LT	158	return;
	159
	160	if (!(skb = skb_dequeue(&(info->txq))))
	161	break;
	162
	163	/* Send frame */
	164	len = dtl1_write(iobase, 32, skb->data, skb->len);
	165
	166	if (len == skb->len) {
	167	set_bit(XMIT_WAITING, &(info->tx_state));
	168	kfree_skb(skb);
	169	} else {
	170	skb_pull(skb, len);
	171	skb_queue_head(&(info->txq), skb);
	172	}
	173
	174	info->hdev->stat.byte_tx += len;
	175
	176	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
	177
	178	clear_bit(XMIT_SENDING, &(info->tx_state));
	179	}
	180
	181
	182	static void dtl1_control(dtl1_info_t info, struct sk_buff skb)
	183	{
	184	u8 flowmask = (u8 )skb->data;
	185	int i;
	186
	187	printk(KERN_INFO "Bluetooth: Nokia control data =");
	188	for (i = 0; i < skb->len; i++) {
	189	printk(" %02x", skb->data[i]);
	190	}
	191	printk("\n");
	192
	193	/* transition to active state */
	194	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
	195	clear_bit(XMIT_WAITING, &(info->tx_state));
	196	dtl1_write_wakeup(info);
	197	}
	198
	199	info->flowmask = flowmask;
	200
	201	kfree_skb(skb);
	202	}
	203
	204
	205	static void dtl1_receive(dtl1_info_t *info)
	206	{
	207	unsigned int iobase;
	208	nsh_t *nsh;
	209	int boguscount = 0;
	210
	211	if (!info) {
	212	BT_ERR("Unknown device");
	213	return;
	214	}
	215
9a017a91	216	iobase = info->p_dev->resource[0]->start;
1da177e4 LT	217
	218	do {
	219	info->hdev->stat.byte_rx++;
	220
	221	/* Allocate packet */
	222	if (info->rx_skb == NULL)
	223	if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
	224	BT_ERR("Can't allocate mem for new packet");
	225	info->rx_state = RECV_WAIT_NSH;
	226	info->rx_count = NSHL;
	227	return;
	228	}
	229
	230	*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
	231	nsh = (nsh_t *)info->rx_skb->data;
	232
	233	info->rx_count--;
	234
	235	if (info->rx_count == 0) {
	236
	237	switch (info->rx_state) {
	238	case RECV_WAIT_NSH:
	239	info->rx_state = RECV_WAIT_DATA;
	240	info->rx_count = nsh->len + (nsh->len & 0x0001);
	241	break;
	242	case RECV_WAIT_DATA:
0d48d939	243	bt_cb(info->rx_skb)->pkt_type = nsh->type;
1da177e4 LT	244
	245	/* remove PAD byte if it exists */
	246	if (nsh->len & 0x0001) {
	247	info->rx_skb->tail--;
	248	info->rx_skb->len--;
	249	}
	250
	251	/* remove NSH */
	252	skb_pull(info->rx_skb, NSHL);
	253
0d48d939	254	switch (bt_cb(info->rx_skb)->pkt_type) {
1da177e4 LT	255	case 0x80:
	256	/* control data for the Nokia Card */
	257	dtl1_control(info, info->rx_skb);
	258	break;
	259	case 0x82:
	260	case 0x83:
	261	case 0x84:
	262	/* send frame to the HCI layer */
	263	info->rx_skb->dev = (void *) info->hdev;
0d48d939	264	bt_cb(info->rx_skb)->pkt_type &= 0x0f;
1da177e4 LT	265	hci_recv_frame(info->rx_skb);
	266	break;
	267	default:
	268	/* unknown packet */
0d48d939	269	BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
1da177e4 LT	270	kfree_skb(info->rx_skb);
	271	break;
	272	}
	273
	274	info->rx_state = RECV_WAIT_NSH;
	275	info->rx_count = NSHL;
	276	info->rx_skb = NULL;
	277	break;
	278	}
	279
	280	}
	281
	282	/* Make sure we don't stay here too long */
	283	if (boguscount++ > 32)
	284	break;
	285
	286	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
	287	}
	288
	289
7d12e780	290	static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
1da177e4 LT	291	{
	292	dtl1_info_t *info = dev_inst;
	293	unsigned int iobase;
	294	unsigned char msr;
	295	int boguscount = 0;
	296	int iir, lsr;
aafcf998	297	irqreturn_t r = IRQ_NONE;
1da177e4	298
7427847d MF	299	if (!info \|\| !info->hdev)
	300	/* our irq handler is shared */
	301	return IRQ_NONE;
1da177e4	302
9a017a91	303	iobase = info->p_dev->resource[0]->start;
1da177e4 LT	304
	305	spin_lock(&(info->lock));
	306
	307	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	308	while (iir) {
	309
aafcf998	310	r = IRQ_HANDLED;
1da177e4 LT	311	/* Clear interrupt */
	312	lsr = inb(iobase + UART_LSR);
	313
	314	switch (iir) {
	315	case UART_IIR_RLSI:
	316	BT_ERR("RLSI");
	317	break;
	318	case UART_IIR_RDI:
	319	/* Receive interrupt */
	320	dtl1_receive(info);
	321	break;
	322	case UART_IIR_THRI:
	323	if (lsr & UART_LSR_THRE) {
	324	/* Transmitter ready for data */
	325	dtl1_write_wakeup(info);
	326	}
	327	break;
	328	default:
	329	BT_ERR("Unhandled IIR=%#x", iir);
	330	break;
	331	}
	332
	333	/* Make sure we don't stay here too long */
	334	if (boguscount++ > 100)
	335	break;
	336
	337	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	338
	339	}
	340
	341	msr = inb(iobase + UART_MSR);
	342
	343	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
	344	info->ri_latch = msr & UART_MSR_RI;
	345	clear_bit(XMIT_WAITING, &(info->tx_state));
	346	dtl1_write_wakeup(info);
aafcf998	347	r = IRQ_HANDLED;
1da177e4 LT	348	}
	349
	350	spin_unlock(&(info->lock));
	351
aafcf998	352	return r;
1da177e4 LT	353	}
	354
	355
	356
	357	/* ======================== HCI interface ======================== */
	358
	359
	360	static int dtl1_hci_open(struct hci_dev *hdev)
	361	{
	362	set_bit(HCI_RUNNING, &(hdev->flags));
	363
	364	return 0;
	365	}
	366
	367
	368	static int dtl1_hci_flush(struct hci_dev *hdev)
	369	{
	370	dtl1_info_t info = (dtl1_info_t )(hdev->driver_data);
	371
	372	/* Drop TX queue */
	373	skb_queue_purge(&(info->txq));
	374
	375	return 0;
	376	}
	377
	378
	379	static int dtl1_hci_close(struct hci_dev *hdev)
	380	{
	381	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
	382	return 0;
	383
	384	dtl1_hci_flush(hdev);
	385
	386	return 0;
	387	}
	388
	389
	390	static int dtl1_hci_send_frame(struct sk_buff *skb)
	391	{
	392	dtl1_info_t *info;
	393	struct hci_dev hdev = (struct hci_dev )(skb->dev);
	394	struct sk_buff *s;
	395	nsh_t nsh;
	396
	397	if (!hdev) {
	398	BT_ERR("Frame for unknown HCI device (hdev=NULL)");
	399	return -ENODEV;
	400	}
	401
	402	info = (dtl1_info_t *)(hdev->driver_data);
	403
0d48d939	404	switch (bt_cb(skb)->pkt_type) {
1da177e4 LT	405	case HCI_COMMAND_PKT:
	406	hdev->stat.cmd_tx++;
	407	nsh.type = 0x81;
	408	break;
	409	case HCI_ACLDATA_PKT:
	410	hdev->stat.acl_tx++;
	411	nsh.type = 0x82;
	412	break;
	413	case HCI_SCODATA_PKT:
	414	hdev->stat.sco_tx++;
	415	nsh.type = 0x83;
	416	break;
3c4bdc4b MH	417	default:
3c4bdc4b MH	418	return -EILSEQ;
1da177e4 LT	419	};
	420
	421	nsh.zero = 0;
	422	nsh.len = skb->len;
	423
	424	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
57136ca6 JJ	425	if (!s)
	426	return -ENOMEM;
	427
1da177e4	428	skb_reserve(s, NSHL);
d626f62b	429	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
1da177e4 LT	430	if (skb->len & 0x0001)
	431	skb_put(s, 1) = 0; / PAD */
	432
	433	/* Prepend skb with Nokia frame header and queue */
	434	memcpy(skb_push(s, NSHL), &nsh, NSHL);
	435	skb_queue_tail(&(info->txq), s);
	436
	437	dtl1_write_wakeup(info);
	438
	439	kfree_skb(skb);
	440
	441	return 0;
	442	}
	443
	444
	445	static void dtl1_hci_destruct(struct hci_dev *hdev)
	446	{
	447	}
	448
	449
	450	static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
	451	{
	452	return -ENOIOCTLCMD;
	453	}
	454
	455
	456
	457	/* ======================== Card services HCI interaction ======================== */
	458
	459
	460	static int dtl1_open(dtl1_info_t *info)
	461	{
	462	unsigned long flags;
9a017a91	463	unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4 LT	464	struct hci_dev *hdev;
	465
	466	spin_lock_init(&(info->lock));
	467
	468	skb_queue_head_init(&(info->txq));
	469
	470	info->rx_state = RECV_WAIT_NSH;
	471	info->rx_count = NSHL;
	472	info->rx_skb = NULL;
	473
	474	set_bit(XMIT_WAITING, &(info->tx_state));
	475
	476	/* Initialize HCI device */
	477	hdev = hci_alloc_dev();
	478	if (!hdev) {
	479	BT_ERR("Can't allocate HCI device");
	480	return -ENOMEM;
	481	}
	482
	483	info->hdev = hdev;
	484
c13854ce	485	hdev->bus = HCI_PCCARD;
1da177e4	486	hdev->driver_data = info;
27d35284	487	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
1da177e4 LT	488
	489	hdev->open = dtl1_hci_open;
	490	hdev->close = dtl1_hci_close;
	491	hdev->flush = dtl1_hci_flush;
	492	hdev->send = dtl1_hci_send_frame;
	493	hdev->destruct = dtl1_hci_destruct;
	494	hdev->ioctl = dtl1_hci_ioctl;
	495
	496	hdev->owner = THIS_MODULE;
	497
	498	spin_lock_irqsave(&(info->lock), flags);
	499
	500	/* Reset UART */
	501	outb(0, iobase + UART_MCR);
	502
	503	/* Turn off interrupts */
	504	outb(0, iobase + UART_IER);
	505
	506	/* Initialize UART */
	507	outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
	508	outb((UART_MCR_DTR \| UART_MCR_RTS \| UART_MCR_OUT2), iobase + UART_MCR);
	509
9a017a91 DB	510	info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
9a017a91 DB	511	& UART_MSR_RI;
1da177e4 LT	512
	513	/* Turn on interrupts */
	514	outb(UART_IER_RLSI \| UART_IER_RDI \| UART_IER_THRI, iobase + UART_IER);
	515
	516	spin_unlock_irqrestore(&(info->lock), flags);
	517
	518	/* Timeout before it is safe to send the first HCI packet */
	519	msleep(2000);
	520
	521	/* Register HCI device */
	522	if (hci_register_dev(hdev) < 0) {
	523	BT_ERR("Can't register HCI device");
	524	info->hdev = NULL;
	525	hci_free_dev(hdev);
	526	return -ENODEV;
	527	}
	528
	529	return 0;
	530	}
	531
	532
	533	static int dtl1_close(dtl1_info_t *info)
	534	{
	535	unsigned long flags;
9a017a91	536	unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4 LT	537	struct hci_dev *hdev = info->hdev;
	538
	539	if (!hdev)
	540	return -ENODEV;
	541
	542	dtl1_hci_close(hdev);
	543
	544	spin_lock_irqsave(&(info->lock), flags);
	545
	546	/* Reset UART */
	547	outb(0, iobase + UART_MCR);
	548
	549	/* Turn off interrupts */
	550	outb(0, iobase + UART_IER);
	551
	552	spin_unlock_irqrestore(&(info->lock), flags);
	553
	554	if (hci_unregister_dev(hdev) < 0)
	555	BT_ERR("Can't unregister HCI device %s", hdev->name);
	556
	557	hci_free_dev(hdev);
	558
	559	return 0;
	560	}
	561
15b99ac1	562	static int dtl1_probe(struct pcmcia_device *link)
1da177e4 LT	563	{
1da177e4 LT	564	dtl1_info_t *info;
1da177e4 LT	565
1da177e4 LT	566	/* Create new info device */
089b1dbb	567	info = kzalloc(sizeof(*info), GFP_KERNEL);
1da177e4	568	if (!info)
f8cfa618	569	return -ENOMEM;
1da177e4	570
fba395ee	571	info->p_dev = link;
1da177e4 LT	572	link->priv = info;
1da177e4 LT	573
00990e7c	574	link->config_flags \|= CONF_ENABLE_IRQ \| CONF_AUTO_SET_IO;
1da177e4	575
15b99ac1	576	return dtl1_config(link);
1da177e4 LT	577	}
	578
	579
fba395ee	580	static void dtl1_detach(struct pcmcia_device *link)
1da177e4 LT	581	{
1da177e4 LT	582	dtl1_info_t *info = link->priv;
1da177e4	583
e2d40963	584	dtl1_release(link);
1da177e4	585
1da177e4 LT	586	kfree(info);
	587	}
	588
00990e7c	589	static int dtl1_confcheck(struct pcmcia_device p_dev, void priv_data)
1da177e4	590	{
00990e7c	591	if ((p_dev->resource[1]->end) \|\| (p_dev->resource[1]->end < 8))
90abdc3b DB	592	return -ENODEV;
90abdc3b DB	593
00990e7c DB	594	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
	595	p_dev->resource[0]->flags \|= IO_DATA_PATH_WIDTH_8;
	596
90abdc3b	597	return pcmcia_request_io(p_dev);
1da177e4 LT	598	}
1da177e4 LT	599
15b99ac1	600	static int dtl1_config(struct pcmcia_device *link)
1da177e4	601	{
1da177e4	602	dtl1_info_t *info = link->priv;
af2b3b50	603	int i;
1da177e4	604
1da177e4	605	/* Look for a generic full-sized window */
90abdc3b	606	link->resource[0]->end = 8;
cb6dbd79	607	if (pcmcia_loop_config(link, dtl1_confcheck, NULL) < 0)
1da177e4	608	goto failed;
1da177e4	609
eb14120f	610	i = pcmcia_request_irq(link, dtl1_interrupt);
9ac3e58c	611	if (i != 0)
eb14120f	612	goto failed;
1da177e4	613
1ac71e5a	614	i = pcmcia_enable_device(link);
9ac3e58c	615	if (i != 0)
1da177e4	616	goto failed;
1da177e4 LT	617
	618	if (dtl1_open(info) != 0)
	619	goto failed;
	620
15b99ac1	621	return 0;
1da177e4	622
1da177e4 LT	623	failed:
1da177e4 LT	624	dtl1_release(link);
15b99ac1	625	return -ENODEV;
1da177e4 LT	626	}
	627
	628
fba395ee	629	static void dtl1_release(struct pcmcia_device *link)
1da177e4 LT	630	{
	631	dtl1_info_t *info = link->priv;
	632
e2d40963	633	dtl1_close(info);
1da177e4	634
fba395ee	635	pcmcia_disable_device(link);
1da177e4 LT	636	}
1da177e4 LT	637
1da177e4	638
88eca2e5 DB	639	static struct pcmcia_device_id dtl1_ids[] = {
88eca2e5 DB	640	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
8602b4fe	641	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
88eca2e5	642	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
725a6abf	643	PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
88eca2e5 DB	644	PCMCIA_DEVICE_NULL
	645	};
	646	MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
	647
1da177e4 LT	648	static struct pcmcia_driver dtl1_driver = {
1da177e4 LT	649	.owner = THIS_MODULE,
2e9b981a	650	.name = "dtl1_cs",
15b99ac1	651	.probe = dtl1_probe,
cc3b4866	652	.remove = dtl1_detach,
88eca2e5	653	.id_table = dtl1_ids,
1da177e4 LT	654	};
	655
	656	static int __init init_dtl1_cs(void)
	657	{
	658	return pcmcia_register_driver(&dtl1_driver);
	659	}
	660
	661
	662	static void __exit exit_dtl1_cs(void)
	663	{
	664	pcmcia_unregister_driver(&dtl1_driver);
1da177e4 LT	665	}
	666
	667	module_init(init_dtl1_cs);
	668	module_exit(exit_dtl1_cs);