[GitHub/mt8127/android_kernel_alcatel_ttab.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 ======================== */


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);


/* 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 {
		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;

		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 = hci_get_drvdata(hdev);

	/* 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 = hci_get_drvdata(hdev);

	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 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;
	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;
	hdev->ioctl    = dtl1_hci_ioctl;

	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);

	hci_unregister_dev(hdev);
	hci_free_dev(hdev);

	return 0;
}

static int dtl1_probe(struct pcmcia_device *link)
{
	dtl1_info_t *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)
{
	dtl1_info_t *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)
{
	dtl1_info_t *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
	65	typedef struct dtl1_info_t {
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;
	81	} dtl1_info_t;
	82
	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
	97	typedef struct {
	98	u8 type;
	99	u8 zero;
	100	u16 len;
81ca405a	101	} __packed nsh_t; /* 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
	129	static void dtl1_write_wakeup(dtl1_info_t *info)
	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;
	155
	156	if (!(skb = skb_dequeue(&(info->txq))))
	157	break;
	158
	159	/* Send frame */
	160	len = dtl1_write(iobase, 32, skb->data, skb->len);
	161
	162	if (len == skb->len) {
	163	set_bit(XMIT_WAITING, &(info->tx_state));
	164	kfree_skb(skb);
	165	} else {
	166	skb_pull(skb, len);
	167	skb_queue_head(&(info->txq), skb);
	168	}
	169
	170	info->hdev->stat.byte_tx += len;
	171
	172	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
	173
	174	clear_bit(XMIT_SENDING, &(info->tx_state));
	175	}
	176
	177
	178	static void dtl1_control(dtl1_info_t info, struct sk_buff skb)
	179	{
	180	u8 flowmask = (u8 )skb->data;
	181	int i;
	182
	183	printk(KERN_INFO "Bluetooth: Nokia control data =");
	184	for (i = 0; i < skb->len; i++) {
	185	printk(" %02x", skb->data[i]);
	186	}
	187	printk("\n");
	188
	189	/* transition to active state */
	190	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
	191	clear_bit(XMIT_WAITING, &(info->tx_state));
	192	dtl1_write_wakeup(info);
	193	}
	194
	195	info->flowmask = flowmask;
	196
	197	kfree_skb(skb);
	198	}
	199
	200
	201	static void dtl1_receive(dtl1_info_t *info)
	202	{
	203	unsigned int iobase;
	204	nsh_t *nsh;
	205	int boguscount = 0;
	206
	207	if (!info) {
	208	BT_ERR("Unknown device");
	209	return;
	210	}
	211
9a017a91	212	iobase = info->p_dev->resource[0]->start;
1da177e4 LT	213
	214	do {
	215	info->hdev->stat.byte_rx++;
	216
	217	/* Allocate packet */
	218	if (info->rx_skb == NULL)
	219	if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
	220	BT_ERR("Can't allocate mem for new packet");
	221	info->rx_state = RECV_WAIT_NSH;
	222	info->rx_count = NSHL;
	223	return;
	224	}
	225
	226	*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
	227	nsh = (nsh_t *)info->rx_skb->data;
	228
	229	info->rx_count--;
	230
	231	if (info->rx_count == 0) {
	232
	233	switch (info->rx_state) {
	234	case RECV_WAIT_NSH:
	235	info->rx_state = RECV_WAIT_DATA;
	236	info->rx_count = nsh->len + (nsh->len & 0x0001);
	237	break;
	238	case RECV_WAIT_DATA:
0d48d939	239	bt_cb(info->rx_skb)->pkt_type = nsh->type;
1da177e4 LT	240
	241	/* remove PAD byte if it exists */
	242	if (nsh->len & 0x0001) {
	243	info->rx_skb->tail--;
	244	info->rx_skb->len--;
	245	}
	246
	247	/* remove NSH */
	248	skb_pull(info->rx_skb, NSHL);
	249
0d48d939	250	switch (bt_cb(info->rx_skb)->pkt_type) {
1da177e4 LT	251	case 0x80:
	252	/* control data for the Nokia Card */
	253	dtl1_control(info, info->rx_skb);
	254	break;
	255	case 0x82:
	256	case 0x83:
	257	case 0x84:
	258	/* send frame to the HCI layer */
	259	info->rx_skb->dev = (void *) info->hdev;
0d48d939	260	bt_cb(info->rx_skb)->pkt_type &= 0x0f;
1da177e4 LT	261	hci_recv_frame(info->rx_skb);
	262	break;
	263	default:
	264	/* unknown packet */
0d48d939	265	BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
1da177e4 LT	266	kfree_skb(info->rx_skb);
	267	break;
	268	}
	269
	270	info->rx_state = RECV_WAIT_NSH;
	271	info->rx_count = NSHL;
	272	info->rx_skb = NULL;
	273	break;
	274	}
	275
	276	}
	277
	278	/* Make sure we don't stay here too long */
	279	if (boguscount++ > 32)
	280	break;
	281
	282	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
	283	}
	284
	285
7d12e780	286	static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
1da177e4 LT	287	{
	288	dtl1_info_t *info = dev_inst;
	289	unsigned int iobase;
	290	unsigned char msr;
	291	int boguscount = 0;
	292	int iir, lsr;
aafcf998	293	irqreturn_t r = IRQ_NONE;
1da177e4	294
7427847d MF	295	if (!info \|\| !info->hdev)
	296	/* our irq handler is shared */
	297	return IRQ_NONE;
1da177e4	298
9a017a91	299	iobase = info->p_dev->resource[0]->start;
1da177e4 LT	300
	301	spin_lock(&(info->lock));
	302
	303	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	304	while (iir) {
	305
aafcf998	306	r = IRQ_HANDLED;
1da177e4 LT	307	/* Clear interrupt */
	308	lsr = inb(iobase + UART_LSR);
	309
	310	switch (iir) {
	311	case UART_IIR_RLSI:
	312	BT_ERR("RLSI");
	313	break;
	314	case UART_IIR_RDI:
	315	/* Receive interrupt */
	316	dtl1_receive(info);
	317	break;
	318	case UART_IIR_THRI:
	319	if (lsr & UART_LSR_THRE) {
	320	/* Transmitter ready for data */
	321	dtl1_write_wakeup(info);
	322	}
	323	break;
	324	default:
	325	BT_ERR("Unhandled IIR=%#x", iir);
	326	break;
	327	}
	328
	329	/* Make sure we don't stay here too long */
	330	if (boguscount++ > 100)
	331	break;
	332
	333	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	334
	335	}
	336
	337	msr = inb(iobase + UART_MSR);
	338
	339	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
	340	info->ri_latch = msr & UART_MSR_RI;
	341	clear_bit(XMIT_WAITING, &(info->tx_state));
	342	dtl1_write_wakeup(info);
aafcf998	343	r = IRQ_HANDLED;
1da177e4 LT	344	}
	345
	346	spin_unlock(&(info->lock));
	347
aafcf998	348	return r;
1da177e4 LT	349	}
	350
	351
	352
	353	/* ======================== HCI interface ======================== */
	354
	355
	356	static int dtl1_hci_open(struct hci_dev *hdev)
	357	{
	358	set_bit(HCI_RUNNING, &(hdev->flags));
	359
	360	return 0;
	361	}
	362
	363
	364	static int dtl1_hci_flush(struct hci_dev *hdev)
	365	{
155961e8	366	dtl1_info_t *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	{
	377	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
	378	return 0;
	379
	380	dtl1_hci_flush(hdev);
	381
	382	return 0;
	383	}
	384
	385
	386	static int dtl1_hci_send_frame(struct sk_buff *skb)
	387	{
	388	dtl1_info_t *info;
	389	struct hci_dev hdev = (struct hci_dev )(skb->dev);
	390	struct sk_buff *s;
	391	nsh_t nsh;
	392
	393	if (!hdev) {
	394	BT_ERR("Frame for unknown HCI device (hdev=NULL)");
	395	return -ENODEV;
	396	}
	397
155961e8	398	info = hci_get_drvdata(hdev);
1da177e4	399
0d48d939	400	switch (bt_cb(skb)->pkt_type) {
1da177e4 LT	401	case HCI_COMMAND_PKT:
	402	hdev->stat.cmd_tx++;
	403	nsh.type = 0x81;
	404	break;
	405	case HCI_ACLDATA_PKT:
	406	hdev->stat.acl_tx++;
	407	nsh.type = 0x82;
	408	break;
	409	case HCI_SCODATA_PKT:
	410	hdev->stat.sco_tx++;
	411	nsh.type = 0x83;
	412	break;
3c4bdc4b MH	413	default:
3c4bdc4b MH	414	return -EILSEQ;
1da177e4 LT	415	};
	416
	417	nsh.zero = 0;
	418	nsh.len = skb->len;
	419
	420	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
57136ca6 JJ	421	if (!s)
	422	return -ENOMEM;
	423
1da177e4	424	skb_reserve(s, NSHL);
d626f62b	425	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
1da177e4 LT	426	if (skb->len & 0x0001)
	427	skb_put(s, 1) = 0; / PAD */
	428
	429	/* Prepend skb with Nokia frame header and queue */
	430	memcpy(skb_push(s, NSHL), &nsh, NSHL);
	431	skb_queue_tail(&(info->txq), s);
	432
	433	dtl1_write_wakeup(info);
	434
	435	kfree_skb(skb);
	436
	437	return 0;
	438	}
	439
	440
1da177e4 LT	441	static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
	442	{
	443	return -ENOIOCTLCMD;
	444	}
	445
	446
	447
	448	/* ======================== Card services HCI interaction ======================== */
	449
	450
	451	static int dtl1_open(dtl1_info_t *info)
	452	{
	453	unsigned long flags;
9a017a91	454	unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4 LT	455	struct hci_dev *hdev;
	456
	457	spin_lock_init(&(info->lock));
	458
	459	skb_queue_head_init(&(info->txq));
	460
	461	info->rx_state = RECV_WAIT_NSH;
	462	info->rx_count = NSHL;
	463	info->rx_skb = NULL;
	464
	465	set_bit(XMIT_WAITING, &(info->tx_state));
	466
	467	/* Initialize HCI device */
	468	hdev = hci_alloc_dev();
	469	if (!hdev) {
	470	BT_ERR("Can't allocate HCI device");
	471	return -ENOMEM;
	472	}
	473
	474	info->hdev = hdev;
	475
c13854ce	476	hdev->bus = HCI_PCCARD;
155961e8	477	hci_set_drvdata(hdev, info);
27d35284	478	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
1da177e4 LT	479
	480	hdev->open = dtl1_hci_open;
	481	hdev->close = dtl1_hci_close;
	482	hdev->flush = dtl1_hci_flush;
	483	hdev->send = dtl1_hci_send_frame;
1da177e4 LT	484	hdev->ioctl = dtl1_hci_ioctl;
1da177e4 LT	485
1da177e4 LT	486	spin_lock_irqsave(&(info->lock), flags);
	487
	488	/* Reset UART */
	489	outb(0, iobase + UART_MCR);
	490
	491	/* Turn off interrupts */
	492	outb(0, iobase + UART_IER);
	493
	494	/* Initialize UART */
	495	outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
	496	outb((UART_MCR_DTR \| UART_MCR_RTS \| UART_MCR_OUT2), iobase + UART_MCR);
	497
9a017a91 DB	498	info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
9a017a91 DB	499	& UART_MSR_RI;
1da177e4 LT	500
	501	/* Turn on interrupts */
	502	outb(UART_IER_RLSI \| UART_IER_RDI \| UART_IER_THRI, iobase + UART_IER);
	503
	504	spin_unlock_irqrestore(&(info->lock), flags);
	505
	506	/* Timeout before it is safe to send the first HCI packet */
	507	msleep(2000);
	508
	509	/* Register HCI device */
	510	if (hci_register_dev(hdev) < 0) {
	511	BT_ERR("Can't register HCI device");
	512	info->hdev = NULL;
	513	hci_free_dev(hdev);
	514	return -ENODEV;
	515	}
	516
	517	return 0;
	518	}
	519
	520
	521	static int dtl1_close(dtl1_info_t *info)
	522	{
	523	unsigned long flags;
9a017a91	524	unsigned int iobase = info->p_dev->resource[0]->start;
1da177e4 LT	525	struct hci_dev *hdev = info->hdev;
	526
	527	if (!hdev)
	528	return -ENODEV;
	529
	530	dtl1_hci_close(hdev);
	531
	532	spin_lock_irqsave(&(info->lock), flags);
	533
	534	/* Reset UART */
	535	outb(0, iobase + UART_MCR);
	536
	537	/* Turn off interrupts */
	538	outb(0, iobase + UART_IER);
	539
	540	spin_unlock_irqrestore(&(info->lock), flags);
	541
13ea4015	542	hci_unregister_dev(hdev);
1da177e4 LT	543	hci_free_dev(hdev);
	544
	545	return 0;
	546	}
	547
15b99ac1	548	static int dtl1_probe(struct pcmcia_device *link)
1da177e4 LT	549	{
1da177e4 LT	550	dtl1_info_t *info;
1da177e4 LT	551
1da177e4 LT	552	/* Create new info device */
cd7cf78e	553	info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
1da177e4	554	if (!info)
f8cfa618	555	return -ENOMEM;
1da177e4	556
fba395ee	557	info->p_dev = link;
1da177e4 LT	558	link->priv = info;
1da177e4 LT	559
00990e7c	560	link->config_flags \|= CONF_ENABLE_IRQ \| CONF_AUTO_SET_IO;
1da177e4	561
15b99ac1	562	return dtl1_config(link);
1da177e4 LT	563	}
	564
	565
fba395ee	566	static void dtl1_detach(struct pcmcia_device *link)
1da177e4 LT	567	{
1da177e4 LT	568	dtl1_info_t *info = link->priv;
1da177e4	569
5a0b8159 DH	570	dtl1_close(info);
5a0b8159 DH	571	pcmcia_disable_device(link);
1da177e4 LT	572	}
1da177e4 LT	573
00990e7c	574	static int dtl1_confcheck(struct pcmcia_device p_dev, void priv_data)
1da177e4	575	{
00990e7c	576	if ((p_dev->resource[1]->end) \|\| (p_dev->resource[1]->end < 8))
90abdc3b DB	577	return -ENODEV;
90abdc3b DB	578
00990e7c DB	579	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
	580	p_dev->resource[0]->flags \|= IO_DATA_PATH_WIDTH_8;
	581
90abdc3b	582	return pcmcia_request_io(p_dev);
1da177e4 LT	583	}
1da177e4 LT	584
15b99ac1	585	static int dtl1_config(struct pcmcia_device *link)
1da177e4	586	{
1da177e4	587	dtl1_info_t *info = link->priv;
46afeded	588	int ret;
1da177e4	589
1da177e4	590	/* Look for a generic full-sized window */
90abdc3b	591	link->resource[0]->end = 8;
46afeded DN	592	ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
46afeded DN	593	if (ret)
1da177e4	594	goto failed;
1da177e4	595
46afeded DN	596	ret = pcmcia_request_irq(link, dtl1_interrupt);
46afeded DN	597	if (ret)
eb14120f	598	goto failed;
1da177e4	599
46afeded DN	600	ret = pcmcia_enable_device(link);
46afeded DN	601	if (ret)
1da177e4	602	goto failed;
1da177e4	603
46afeded DN	604	ret = dtl1_open(info);
46afeded DN	605	if (ret)
1da177e4 LT	606	goto failed;
1da177e4 LT	607
15b99ac1	608	return 0;
1da177e4	609
1da177e4	610	failed:
5a0b8159	611	dtl1_detach(link);
46afeded	612	return ret;
1da177e4 LT	613	}
1da177e4 LT	614
25f8f54f	615	static const struct pcmcia_device_id dtl1_ids[] = {
88eca2e5	616	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
8602b4fe	617	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
88eca2e5	618	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
725a6abf	619	PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
88eca2e5 DB	620	PCMCIA_DEVICE_NULL
	621	};
	622	MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
	623
1da177e4 LT	624	static struct pcmcia_driver dtl1_driver = {
1da177e4 LT	625	.owner = THIS_MODULE,
2e9b981a	626	.name = "dtl1_cs",
15b99ac1	627	.probe = dtl1_probe,
cc3b4866	628	.remove = dtl1_detach,
88eca2e5	629	.id_table = dtl1_ids,
1da177e4	630	};
e0c005f4	631	module_pcmcia_driver(dtl1_driver);