[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/system.h>
#include <asm/io.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.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;
	dev_node_t node;

	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;
} __attribute__ ((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->io.BasePort1;
		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->io.BasePort1;

	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;

	BUG_ON(!info->hdev);

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

	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->io.BasePort1;
	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->type = 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->io.BasePort1 + 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->io.BasePort1;
	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->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 = dtl1_interrupt;
	link->irq.Instance = info;

	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.IntType = INT_MEMORY_AND_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,
			  cistpl_cftable_entry_t *cf,
			  cistpl_cftable_entry_t *dflt,
			  unsigned int vcc,
			  void *priv_data)
{
	if ((cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
		p_dev->io.BasePort1 = cf->io.win[0].base;
		p_dev->io.NumPorts1 = cf->io.win[0].len;	/*yo */
		p_dev->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
		if (!pcmcia_request_io(p_dev, &p_dev->io))
			return 0;
	}
	return -ENODEV;
}

static int dtl1_config(struct pcmcia_device *link)
{
	dtl1_info_t *info = link->priv;
	int i;

	/* Look for a generic full-sized window */
	link->io.NumPorts1 = 8;
	if (!pcmcia_loop_config(link, dtl1_confcheck, NULL))
		goto failed;

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

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

	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,
	.drv		= {
		.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/cs_types.h>
	45	#include <pcmcia/cs.h>
	46	#include <pcmcia/cistpl.h>
	47	#include <pcmcia/ciscode.h>
	48	#include <pcmcia/ds.h>
	49	#include <pcmcia/cisreg.h>
	50
	51	#include <net/bluetooth/bluetooth.h>
	52	#include <net/bluetooth/hci_core.h>
	53
	54
	55
	56	/* ======================== Module parameters ======================== */
	57
	58
	59	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	60	MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
	61	MODULE_LICENSE("GPL");
	62
	63
	64
	65	/* ======================== Local structures ======================== */
	66
	67
	68	typedef struct dtl1_info_t {
fd238232	69	struct pcmcia_device *p_dev;
1da177e4 LT	70	dev_node_t node;
	71
	72	struct hci_dev *hdev;
	73
	74	spinlock_t lock; /* For serializing operations */
	75
	76	unsigned long flowmask; /* HCI flow mask */
	77	int ri_latch;
	78
	79	struct sk_buff_head txq;
	80	unsigned long tx_state;
	81
	82	unsigned long rx_state;
	83	unsigned long rx_count;
	84	struct sk_buff *rx_skb;
	85	} dtl1_info_t;
	86
	87
15b99ac1	88	static int dtl1_config(struct pcmcia_device *link);
fba395ee	89	static void dtl1_release(struct pcmcia_device *link);
1da177e4	90
cc3b4866	91	static void dtl1_detach(struct pcmcia_device *p_dev);
1da177e4	92
1da177e4 LT	93
	94	/* Transmit states */
	95	#define XMIT_SENDING 1
	96	#define XMIT_WAKEUP 2
	97	#define XMIT_WAITING 8
	98
	99	/* Receiver States */
	100	#define RECV_WAIT_NSH 0
	101	#define RECV_WAIT_DATA 1
	102
	103
	104	typedef struct {
	105	u8 type;
	106	u8 zero;
	107	u16 len;
	108	} __attribute__ ((packed)) nsh_t; /* Nokia Specific Header */
	109
	110	#define NSHL 4 /* Nokia Specific Header Length */
	111
	112
	113
	114	/* ======================== Interrupt handling ======================== */
	115
	116
	117	static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
	118	{
	119	int actual = 0;
	120
	121	/* Tx FIFO should be empty */
	122	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
	123	return 0;
	124
	125	/* Fill FIFO with current frame */
	126	while ((fifo_size-- > 0) && (actual < len)) {
	127	/* Transmit next byte */
	128	outb(buf[actual], iobase + UART_TX);
	129	actual++;
	130	}
	131
	132	return actual;
	133	}
	134
	135
	136	static void dtl1_write_wakeup(dtl1_info_t *info)
	137	{
	138	if (!info) {
	139	BT_ERR("Unknown device");
	140	return;
	141	}
	142
	143	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
	144	set_bit(XMIT_WAKEUP, &(info->tx_state));
	145	return;
	146	}
	147
	148	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
	149	set_bit(XMIT_WAKEUP, &(info->tx_state));
	150	return;
	151	}
	152
	153	do {
fd238232	154	register unsigned int iobase = info->p_dev->io.BasePort1;
1da177e4 LT	155	register struct sk_buff *skb;
	156	register int len;
	157
	158	clear_bit(XMIT_WAKEUP, &(info->tx_state));
	159
e2d40963	160	if (!pcmcia_dev_present(info->p_dev))
1da177e4 LT	161	return;
	162
	163	if (!(skb = skb_dequeue(&(info->txq))))
	164	break;
	165
	166	/* Send frame */
	167	len = dtl1_write(iobase, 32, skb->data, skb->len);
	168
	169	if (len == skb->len) {
	170	set_bit(XMIT_WAITING, &(info->tx_state));
	171	kfree_skb(skb);
	172	} else {
	173	skb_pull(skb, len);
	174	skb_queue_head(&(info->txq), skb);
	175	}
	176
	177	info->hdev->stat.byte_tx += len;
	178
	179	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
	180
	181	clear_bit(XMIT_SENDING, &(info->tx_state));
	182	}
	183
	184
	185	static void dtl1_control(dtl1_info_t info, struct sk_buff skb)
	186	{
	187	u8 flowmask = (u8 )skb->data;
	188	int i;
	189
	190	printk(KERN_INFO "Bluetooth: Nokia control data =");
	191	for (i = 0; i < skb->len; i++) {
	192	printk(" %02x", skb->data[i]);
	193	}
	194	printk("\n");
	195
	196	/* transition to active state */
	197	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
	198	clear_bit(XMIT_WAITING, &(info->tx_state));
	199	dtl1_write_wakeup(info);
	200	}
	201
	202	info->flowmask = flowmask;
	203
	204	kfree_skb(skb);
	205	}
	206
	207
	208	static void dtl1_receive(dtl1_info_t *info)
	209	{
	210	unsigned int iobase;
	211	nsh_t *nsh;
	212	int boguscount = 0;
	213
	214	if (!info) {
	215	BT_ERR("Unknown device");
	216	return;
	217	}
	218
fd238232	219	iobase = info->p_dev->io.BasePort1;
1da177e4 LT	220
	221	do {
	222	info->hdev->stat.byte_rx++;
	223
	224	/* Allocate packet */
	225	if (info->rx_skb == NULL)
	226	if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
	227	BT_ERR("Can't allocate mem for new packet");
	228	info->rx_state = RECV_WAIT_NSH;
	229	info->rx_count = NSHL;
	230	return;
	231	}
	232
	233	*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
	234	nsh = (nsh_t *)info->rx_skb->data;
	235
	236	info->rx_count--;
	237
	238	if (info->rx_count == 0) {
	239
	240	switch (info->rx_state) {
	241	case RECV_WAIT_NSH:
	242	info->rx_state = RECV_WAIT_DATA;
	243	info->rx_count = nsh->len + (nsh->len & 0x0001);
	244	break;
	245	case RECV_WAIT_DATA:
0d48d939	246	bt_cb(info->rx_skb)->pkt_type = nsh->type;
1da177e4 LT	247
	248	/* remove PAD byte if it exists */
	249	if (nsh->len & 0x0001) {
	250	info->rx_skb->tail--;
	251	info->rx_skb->len--;
	252	}
	253
	254	/* remove NSH */
	255	skb_pull(info->rx_skb, NSHL);
	256
0d48d939	257	switch (bt_cb(info->rx_skb)->pkt_type) {
1da177e4 LT	258	case 0x80:
	259	/* control data for the Nokia Card */
	260	dtl1_control(info, info->rx_skb);
	261	break;
	262	case 0x82:
	263	case 0x83:
	264	case 0x84:
	265	/* send frame to the HCI layer */
	266	info->rx_skb->dev = (void *) info->hdev;
0d48d939	267	bt_cb(info->rx_skb)->pkt_type &= 0x0f;
1da177e4 LT	268	hci_recv_frame(info->rx_skb);
	269	break;
	270	default:
	271	/* unknown packet */
0d48d939	272	BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
1da177e4 LT	273	kfree_skb(info->rx_skb);
	274	break;
	275	}
	276
	277	info->rx_state = RECV_WAIT_NSH;
	278	info->rx_count = NSHL;
	279	info->rx_skb = NULL;
	280	break;
	281	}
	282
	283	}
	284
	285	/* Make sure we don't stay here too long */
	286	if (boguscount++ > 32)
	287	break;
	288
	289	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
	290	}
	291
	292
7d12e780	293	static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
1da177e4 LT	294	{
	295	dtl1_info_t *info = dev_inst;
	296	unsigned int iobase;
	297	unsigned char msr;
	298	int boguscount = 0;
	299	int iir, lsr;
aafcf998	300	irqreturn_t r = IRQ_NONE;
1da177e4	301
ac019360	302	BUG_ON(!info->hdev);
1da177e4	303
fd238232	304	iobase = info->p_dev->io.BasePort1;
1da177e4 LT	305
	306	spin_lock(&(info->lock));
	307
	308	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	309	while (iir) {
	310
aafcf998	311	r = IRQ_HANDLED;
1da177e4 LT	312	/* Clear interrupt */
	313	lsr = inb(iobase + UART_LSR);
	314
	315	switch (iir) {
	316	case UART_IIR_RLSI:
	317	BT_ERR("RLSI");
	318	break;
	319	case UART_IIR_RDI:
	320	/* Receive interrupt */
	321	dtl1_receive(info);
	322	break;
	323	case UART_IIR_THRI:
	324	if (lsr & UART_LSR_THRE) {
	325	/* Transmitter ready for data */
	326	dtl1_write_wakeup(info);
	327	}
	328	break;
	329	default:
	330	BT_ERR("Unhandled IIR=%#x", iir);
	331	break;
	332	}
	333
	334	/* Make sure we don't stay here too long */
	335	if (boguscount++ > 100)
	336	break;
	337
	338	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	339
	340	}
	341
	342	msr = inb(iobase + UART_MSR);
	343
	344	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
	345	info->ri_latch = msr & UART_MSR_RI;
	346	clear_bit(XMIT_WAITING, &(info->tx_state));
	347	dtl1_write_wakeup(info);
aafcf998	348	r = IRQ_HANDLED;
1da177e4 LT	349	}
	350
	351	spin_unlock(&(info->lock));
	352
aafcf998	353	return r;
1da177e4 LT	354	}
	355
	356
	357
	358	/* ======================== HCI interface ======================== */
	359
	360
	361	static int dtl1_hci_open(struct hci_dev *hdev)
	362	{
	363	set_bit(HCI_RUNNING, &(hdev->flags));
	364
	365	return 0;
	366	}
	367
	368
	369	static int dtl1_hci_flush(struct hci_dev *hdev)
	370	{
	371	dtl1_info_t info = (dtl1_info_t )(hdev->driver_data);
	372
	373	/* Drop TX queue */
	374	skb_queue_purge(&(info->txq));
	375
	376	return 0;
	377	}
	378
	379
	380	static int dtl1_hci_close(struct hci_dev *hdev)
	381	{
	382	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
	383	return 0;
	384
	385	dtl1_hci_flush(hdev);
	386
	387	return 0;
	388	}
	389
	390
	391	static int dtl1_hci_send_frame(struct sk_buff *skb)
	392	{
	393	dtl1_info_t *info;
	394	struct hci_dev hdev = (struct hci_dev )(skb->dev);
	395	struct sk_buff *s;
	396	nsh_t nsh;
	397
	398	if (!hdev) {
	399	BT_ERR("Frame for unknown HCI device (hdev=NULL)");
	400	return -ENODEV;
	401	}
	402
	403	info = (dtl1_info_t *)(hdev->driver_data);
	404
0d48d939	405	switch (bt_cb(skb)->pkt_type) {
1da177e4 LT	406	case HCI_COMMAND_PKT:
	407	hdev->stat.cmd_tx++;
	408	nsh.type = 0x81;
	409	break;
	410	case HCI_ACLDATA_PKT:
	411	hdev->stat.acl_tx++;
	412	nsh.type = 0x82;
	413	break;
	414	case HCI_SCODATA_PKT:
	415	hdev->stat.sco_tx++;
	416	nsh.type = 0x83;
	417	break;
3c4bdc4b MH	418	default:
3c4bdc4b MH	419	return -EILSEQ;
1da177e4 LT	420	};
	421
	422	nsh.zero = 0;
	423	nsh.len = skb->len;
	424
	425	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
57136ca6 JJ	426	if (!s)
	427	return -ENOMEM;
	428
1da177e4	429	skb_reserve(s, NSHL);
d626f62b	430	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
1da177e4 LT	431	if (skb->len & 0x0001)
	432	skb_put(s, 1) = 0; / PAD */
	433
	434	/* Prepend skb with Nokia frame header and queue */
	435	memcpy(skb_push(s, NSHL), &nsh, NSHL);
	436	skb_queue_tail(&(info->txq), s);
	437
	438	dtl1_write_wakeup(info);
	439
	440	kfree_skb(skb);
	441
	442	return 0;
	443	}
	444
	445
	446	static void dtl1_hci_destruct(struct hci_dev *hdev)
	447	{
	448	}
	449
	450
	451	static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
	452	{
	453	return -ENOIOCTLCMD;
	454	}
	455
	456
	457
	458	/* ======================== Card services HCI interaction ======================== */
	459
	460
	461	static int dtl1_open(dtl1_info_t *info)
	462	{
	463	unsigned long flags;
fd238232	464	unsigned int iobase = info->p_dev->io.BasePort1;
1da177e4 LT	465	struct hci_dev *hdev;
	466
	467	spin_lock_init(&(info->lock));
	468
	469	skb_queue_head_init(&(info->txq));
	470
	471	info->rx_state = RECV_WAIT_NSH;
	472	info->rx_count = NSHL;
	473	info->rx_skb = NULL;
	474
	475	set_bit(XMIT_WAITING, &(info->tx_state));
	476
	477	/* Initialize HCI device */
	478	hdev = hci_alloc_dev();
	479	if (!hdev) {
	480	BT_ERR("Can't allocate HCI device");
	481	return -ENOMEM;
	482	}
	483
	484	info->hdev = hdev;
	485
	486	hdev->type = HCI_PCCARD;
	487	hdev->driver_data = info;
27d35284	488	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
1da177e4 LT	489
	490	hdev->open = dtl1_hci_open;
	491	hdev->close = dtl1_hci_close;
	492	hdev->flush = dtl1_hci_flush;
	493	hdev->send = dtl1_hci_send_frame;
	494	hdev->destruct = dtl1_hci_destruct;
	495	hdev->ioctl = dtl1_hci_ioctl;
	496
	497	hdev->owner = THIS_MODULE;
	498
	499	spin_lock_irqsave(&(info->lock), flags);
	500
	501	/* Reset UART */
	502	outb(0, iobase + UART_MCR);
	503
	504	/* Turn off interrupts */
	505	outb(0, iobase + UART_IER);
	506
	507	/* Initialize UART */
	508	outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
	509	outb((UART_MCR_DTR \| UART_MCR_RTS \| UART_MCR_OUT2), iobase + UART_MCR);
	510
fd238232	511	info->ri_latch = inb(info->p_dev->io.BasePort1 + UART_MSR) & 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;
fd238232	536	unsigned int iobase = info->p_dev->io.BasePort1;
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;
	573
	574	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
	575	link->io.NumPorts1 = 8;
aafcf998	576	link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING \| IRQ_HANDLE_PRESENT;
1da177e4 LT	577	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
	578
	579	link->irq.Handler = dtl1_interrupt;
	580	link->irq.Instance = info;
	581
	582	link->conf.Attributes = CONF_ENABLE_IRQ;
1da177e4 LT	583	link->conf.IntType = INT_MEMORY_AND_IO;
1da177e4 LT	584
15b99ac1	585	return dtl1_config(link);
1da177e4 LT	586	}
	587
	588
fba395ee	589	static void dtl1_detach(struct pcmcia_device *link)
1da177e4 LT	590	{
1da177e4 LT	591	dtl1_info_t *info = link->priv;
1da177e4	592
e2d40963	593	dtl1_release(link);
1da177e4	594
1da177e4 LT	595	kfree(info);
	596	}
	597
ed58872a DB	598	static int dtl1_confcheck(struct pcmcia_device *p_dev,
ed58872a DB	599	cistpl_cftable_entry_t *cf,
8e2fc39d	600	cistpl_cftable_entry_t *dflt,
ad913c11	601	unsigned int vcc,
ed58872a	602	void *priv_data)
1da177e4	603	{
ed58872a	604	if ((cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
ed58872a DB	605	p_dev->io.BasePort1 = cf->io.win[0].base;
	606	p_dev->io.NumPorts1 = cf->io.win[0].len; /yo /
	607	p_dev->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
	608	if (!pcmcia_request_io(p_dev, &p_dev->io))
	609	return 0;
	610	}
	611	return -ENODEV;
1da177e4 LT	612	}
1da177e4 LT	613
15b99ac1	614	static int dtl1_config(struct pcmcia_device *link)
1da177e4	615	{
1da177e4	616	dtl1_info_t *info = link->priv;
af2b3b50	617	int i;
1da177e4	618
1da177e4 LT	619	/* Look for a generic full-sized window */
1da177e4 LT	620	link->io.NumPorts1 = 8;
ed58872a	621	if (!pcmcia_loop_config(link, dtl1_confcheck, NULL))
1da177e4	622	goto failed;
1da177e4	623
fba395ee	624	i = pcmcia_request_irq(link, &link->irq);
4c89e88b	625	if (i != 0) {
fba395ee	626	cs_error(link, RequestIRQ, i);
1da177e4 LT	627	link->irq.AssignedIRQ = 0;
	628	}
	629
fba395ee	630	i = pcmcia_request_configuration(link, &link->conf);
4c89e88b	631	if (i != 0) {
fba395ee	632	cs_error(link, RequestConfiguration, i);
1da177e4 LT	633	goto failed;
	634	}
	635
	636	if (dtl1_open(info) != 0)
	637	goto failed;
	638
	639	strcpy(info->node.dev_name, info->hdev->name);
fd238232	640	link->dev_node = &info->node;
1da177e4	641
15b99ac1	642	return 0;
1da177e4	643
1da177e4 LT	644	failed:
1da177e4 LT	645	dtl1_release(link);
15b99ac1	646	return -ENODEV;
1da177e4 LT	647	}
	648
	649
fba395ee	650	static void dtl1_release(struct pcmcia_device *link)
1da177e4 LT	651	{
	652	dtl1_info_t *info = link->priv;
	653
e2d40963	654	dtl1_close(info);
1da177e4	655
fba395ee	656	pcmcia_disable_device(link);
1da177e4 LT	657	}
1da177e4 LT	658
1da177e4	659
88eca2e5 DB	660	static struct pcmcia_device_id dtl1_ids[] = {
88eca2e5 DB	661	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
8602b4fe	662	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
88eca2e5	663	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
725a6abf	664	PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
88eca2e5 DB	665	PCMCIA_DEVICE_NULL
	666	};
	667	MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
	668
1da177e4 LT	669	static struct pcmcia_driver dtl1_driver = {
	670	.owner = THIS_MODULE,
	671	.drv = {
	672	.name = "dtl1_cs",
	673	},
15b99ac1	674	.probe = dtl1_probe,
cc3b4866	675	.remove = dtl1_detach,
88eca2e5	676	.id_table = dtl1_ids,
1da177e4 LT	677	};
	678
	679	static int __init init_dtl1_cs(void)
	680	{
	681	return pcmcia_register_driver(&dtl1_driver);
	682	}
	683
	684
	685	static void __exit exit_dtl1_cs(void)
	686	{
	687	pcmcia_unregister_driver(&dtl1_driver);
1da177e4 LT	688	}
	689
	690	module_init(init_dtl1_cs);
	691	module_exit(exit_dtl1_cs);