[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/sched.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;

	if (!info || !info->hdev) {
		BT_ERR("Call of irq %d for unknown device", irq);
		return IRQ_NONE;
	}

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

	spin_lock(&(info->lock));

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

		/* 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);
	}

	spin_unlock(&(info->lock));

	return IRQ_HANDLED;
}


/* ======================== 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;
	};

	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);
	memcpy(skb_put(s, skb->len), skb->data, 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_EXCLUSIVE | 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 get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
{
	int i;

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

	return pcmcia_parse_tuple(handle, tuple, parse);
}

static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
{
	if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
		return CS_NO_MORE_ITEMS;
	return get_tuple(handle, tuple, parse);
}

static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
{
	if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
		return CS_NO_MORE_ITEMS;
	return get_tuple(handle, tuple, parse);
}

static int dtl1_config(struct pcmcia_device *link)
{
	dtl1_info_t *info = link->priv;
	tuple_t tuple;
	u_short buf[256];
	cisparse_t parse;
	cistpl_cftable_entry_t *cf = &parse.cftable_entry;
	int i, last_ret, last_fn;

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

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

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

	/* Look for a generic full-sized window */
	link->io.NumPorts1 = 8;
	i = first_tuple(link, &tuple, &parse);
	while (i != CS_NO_MORE_ITEMS) {
		if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
			link->conf.ConfigIndex = cf->index;
			link->io.BasePort1 = cf->io.win[0].base;
			link->io.NumPorts1 = cf->io.win[0].len;	/*yo */
			link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
			i = pcmcia_request_io(link, &link->io);
			if (i == CS_SUCCESS)
				break;
		}
		i = next_tuple(link, &tuple, &parse);
	}

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

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

	i = pcmcia_request_configuration(link, &link->conf);
	if (i != CS_SUCCESS) {
		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;

cs_failed:
	cs_error(link, last_fn, last_ret);

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("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>
	29	#include <linux/sched.h>
	30	#include <linux/delay.h>
	31	#include <linux/errno.h>
	32	#include <linux/ptrace.h>
	33	#include <linux/ioport.h>
	34	#include <linux/spinlock.h>
	35	#include <linux/moduleparam.h>
	36
	37	#include <linux/skbuff.h>
	38	#include <linux/string.h>
	39	#include <linux/serial.h>
	40	#include <linux/serial_reg.h>
	41	#include <linux/bitops.h>
	42	#include <asm/system.h>
	43	#include <asm/io.h>
	44
1da177e4 LT	45	#include <pcmcia/cs_types.h>
	46	#include <pcmcia/cs.h>
	47	#include <pcmcia/cistpl.h>
	48	#include <pcmcia/ciscode.h>
	49	#include <pcmcia/ds.h>
	50	#include <pcmcia/cisreg.h>
	51
	52	#include <net/bluetooth/bluetooth.h>
	53	#include <net/bluetooth/hci_core.h>
	54
	55
	56
	57	/* ======================== Module parameters ======================== */
	58
	59
	60	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	61	MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
	62	MODULE_LICENSE("GPL");
	63
	64
	65
	66	/* ======================== Local structures ======================== */
	67
	68
	69	typedef struct dtl1_info_t {
fd238232	70	struct pcmcia_device *p_dev;
1da177e4 LT	71	dev_node_t node;
	72
	73	struct hci_dev *hdev;
	74
	75	spinlock_t lock; /* For serializing operations */
	76
	77	unsigned long flowmask; /* HCI flow mask */
	78	int ri_latch;
	79
	80	struct sk_buff_head txq;
	81	unsigned long tx_state;
	82
	83	unsigned long rx_state;
	84	unsigned long rx_count;
	85	struct sk_buff *rx_skb;
	86	} dtl1_info_t;
	87
	88
15b99ac1	89	static int dtl1_config(struct pcmcia_device *link);
fba395ee	90	static void dtl1_release(struct pcmcia_device *link);
1da177e4	91
cc3b4866	92	static void dtl1_detach(struct pcmcia_device *p_dev);
1da177e4	93
1da177e4 LT	94
	95	/* Transmit states */
	96	#define XMIT_SENDING 1
	97	#define XMIT_WAKEUP 2
	98	#define XMIT_WAITING 8
	99
	100	/* Receiver States */
	101	#define RECV_WAIT_NSH 0
	102	#define RECV_WAIT_DATA 1
	103
	104
	105	typedef struct {
	106	u8 type;
	107	u8 zero;
	108	u16 len;
	109	} __attribute__ ((packed)) nsh_t; /* Nokia Specific Header */
	110
	111	#define NSHL 4 /* Nokia Specific Header Length */
	112
	113
	114
	115	/* ======================== Interrupt handling ======================== */
	116
	117
	118	static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
	119	{
	120	int actual = 0;
	121
	122	/* Tx FIFO should be empty */
	123	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
	124	return 0;
	125
	126	/* Fill FIFO with current frame */
	127	while ((fifo_size-- > 0) && (actual < len)) {
	128	/* Transmit next byte */
	129	outb(buf[actual], iobase + UART_TX);
	130	actual++;
	131	}
	132
	133	return actual;
	134	}
	135
	136
	137	static void dtl1_write_wakeup(dtl1_info_t *info)
	138	{
	139	if (!info) {
	140	BT_ERR("Unknown device");
	141	return;
	142	}
	143
	144	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
	145	set_bit(XMIT_WAKEUP, &(info->tx_state));
	146	return;
	147	}
	148
	149	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
	150	set_bit(XMIT_WAKEUP, &(info->tx_state));
	151	return;
	152	}
	153
	154	do {
fd238232	155	register unsigned int iobase = info->p_dev->io.BasePort1;
1da177e4 LT	156	register struct sk_buff *skb;
	157	register int len;
	158
	159	clear_bit(XMIT_WAKEUP, &(info->tx_state));
	160
e2d40963	161	if (!pcmcia_dev_present(info->p_dev))
1da177e4 LT	162	return;
	163
	164	if (!(skb = skb_dequeue(&(info->txq))))
	165	break;
	166
	167	/* Send frame */
	168	len = dtl1_write(iobase, 32, skb->data, skb->len);
	169
	170	if (len == skb->len) {
	171	set_bit(XMIT_WAITING, &(info->tx_state));
	172	kfree_skb(skb);
	173	} else {
	174	skb_pull(skb, len);
	175	skb_queue_head(&(info->txq), skb);
	176	}
	177
	178	info->hdev->stat.byte_tx += len;
	179
	180	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
	181
	182	clear_bit(XMIT_SENDING, &(info->tx_state));
	183	}
	184
	185
	186	static void dtl1_control(dtl1_info_t info, struct sk_buff skb)
	187	{
	188	u8 flowmask = (u8 )skb->data;
	189	int i;
	190
	191	printk(KERN_INFO "Bluetooth: Nokia control data =");
	192	for (i = 0; i < skb->len; i++) {
	193	printk(" %02x", skb->data[i]);
	194	}
	195	printk("\n");
	196
	197	/* transition to active state */
	198	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
	199	clear_bit(XMIT_WAITING, &(info->tx_state));
	200	dtl1_write_wakeup(info);
	201	}
	202
	203	info->flowmask = flowmask;
	204
	205	kfree_skb(skb);
	206	}
	207
	208
	209	static void dtl1_receive(dtl1_info_t *info)
	210	{
	211	unsigned int iobase;
	212	nsh_t *nsh;
	213	int boguscount = 0;
	214
	215	if (!info) {
	216	BT_ERR("Unknown device");
	217	return;
	218	}
	219
fd238232	220	iobase = info->p_dev->io.BasePort1;
1da177e4 LT	221
	222	do {
	223	info->hdev->stat.byte_rx++;
	224
	225	/* Allocate packet */
	226	if (info->rx_skb == NULL)
	227	if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
	228	BT_ERR("Can't allocate mem for new packet");
	229	info->rx_state = RECV_WAIT_NSH;
	230	info->rx_count = NSHL;
	231	return;
	232	}
	233
	234	*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
	235	nsh = (nsh_t *)info->rx_skb->data;
	236
	237	info->rx_count--;
	238
	239	if (info->rx_count == 0) {
	240
	241	switch (info->rx_state) {
	242	case RECV_WAIT_NSH:
	243	info->rx_state = RECV_WAIT_DATA;
	244	info->rx_count = nsh->len + (nsh->len & 0x0001);
	245	break;
	246	case RECV_WAIT_DATA:
0d48d939	247	bt_cb(info->rx_skb)->pkt_type = nsh->type;
1da177e4 LT	248
	249	/* remove PAD byte if it exists */
	250	if (nsh->len & 0x0001) {
	251	info->rx_skb->tail--;
	252	info->rx_skb->len--;
	253	}
	254
	255	/* remove NSH */
	256	skb_pull(info->rx_skb, NSHL);
	257
0d48d939	258	switch (bt_cb(info->rx_skb)->pkt_type) {
1da177e4 LT	259	case 0x80:
	260	/* control data for the Nokia Card */
	261	dtl1_control(info, info->rx_skb);
	262	break;
	263	case 0x82:
	264	case 0x83:
	265	case 0x84:
	266	/* send frame to the HCI layer */
	267	info->rx_skb->dev = (void *) info->hdev;
0d48d939	268	bt_cb(info->rx_skb)->pkt_type &= 0x0f;
1da177e4 LT	269	hci_recv_frame(info->rx_skb);
	270	break;
	271	default:
	272	/* unknown packet */
0d48d939	273	BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
1da177e4 LT	274	kfree_skb(info->rx_skb);
	275	break;
	276	}
	277
	278	info->rx_state = RECV_WAIT_NSH;
	279	info->rx_count = NSHL;
	280	info->rx_skb = NULL;
	281	break;
	282	}
	283
	284	}
	285
	286	/* Make sure we don't stay here too long */
	287	if (boguscount++ > 32)
	288	break;
	289
	290	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
	291	}
	292
	293
7d12e780	294	static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
1da177e4 LT	295	{
	296	dtl1_info_t *info = dev_inst;
	297	unsigned int iobase;
	298	unsigned char msr;
	299	int boguscount = 0;
	300	int iir, lsr;
	301
	302	if (!info \|\| !info->hdev) {
	303	BT_ERR("Call of irq %d for unknown device", irq);
	304	return IRQ_NONE;
	305	}
	306
fd238232	307	iobase = info->p_dev->io.BasePort1;
1da177e4 LT	308
	309	spin_lock(&(info->lock));
	310
	311	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	312	while (iir) {
	313
	314	/* Clear interrupt */
	315	lsr = inb(iobase + UART_LSR);
	316
	317	switch (iir) {
	318	case UART_IIR_RLSI:
	319	BT_ERR("RLSI");
	320	break;
	321	case UART_IIR_RDI:
	322	/* Receive interrupt */
	323	dtl1_receive(info);
	324	break;
	325	case UART_IIR_THRI:
	326	if (lsr & UART_LSR_THRE) {
	327	/* Transmitter ready for data */
	328	dtl1_write_wakeup(info);
	329	}
	330	break;
	331	default:
	332	BT_ERR("Unhandled IIR=%#x", iir);
	333	break;
	334	}
	335
	336	/* Make sure we don't stay here too long */
	337	if (boguscount++ > 100)
	338	break;
	339
	340	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	341
	342	}
	343
	344	msr = inb(iobase + UART_MSR);
	345
	346	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
	347	info->ri_latch = msr & UART_MSR_RI;
	348	clear_bit(XMIT_WAITING, &(info->tx_state));
	349	dtl1_write_wakeup(info);
	350	}
	351
	352	spin_unlock(&(info->lock));
	353
	354	return IRQ_HANDLED;
	355	}
	356
	357
	358
	359	/* ======================== HCI interface ======================== */
	360
	361
	362	static int dtl1_hci_open(struct hci_dev *hdev)
	363	{
	364	set_bit(HCI_RUNNING, &(hdev->flags));
	365
	366	return 0;
	367	}
	368
	369
	370	static int dtl1_hci_flush(struct hci_dev *hdev)
	371	{
372	dtl1_info_t info = (dtl1_info_t )(hdev->driver_data);
373
374	/* Drop TX queue */
375	skb_queue_purge(&(info->txq));
376
377	return 0;
378	}
379
380
381	static int dtl1_hci_close(struct hci_dev *hdev)
382	{
383	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
384	return 0;
385
386	dtl1_hci_flush(hdev);
387
388	return 0;
389	}
390
391
392	static int dtl1_hci_send_frame(struct sk_buff *skb)
393	{
394	dtl1_info_t *info;
395	struct hci_dev hdev = (struct hci_dev )(skb->dev);
396	struct sk_buff *s;
397	nsh_t nsh;
398
399	if (!hdev) {
400	BT_ERR("Frame for unknown HCI device (hdev=NULL)");
401	return -ENODEV;
402	}
403
404	info = (dtl1_info_t *)(hdev->driver_data);
405
0d48d939	406	switch (bt_cb(skb)->pkt_type) {
1da177e4 LT	407	case HCI_COMMAND_PKT:
	408	hdev->stat.cmd_tx++;
	409	nsh.type = 0x81;
	410	break;
	411	case HCI_ACLDATA_PKT:
	412	hdev->stat.acl_tx++;
	413	nsh.type = 0x82;
	414	break;
	415	case HCI_SCODATA_PKT:
	416	hdev->stat.sco_tx++;
	417	nsh.type = 0x83;
	418	break;
	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 LT	428	skb_reserve(s, NSHL);
	429	memcpy(skb_put(s, skb->len), skb->data, skb->len);
	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;
fd238232	463	unsigned int iobase = info->p_dev->io.BasePort1;
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
	485	hdev->type = HCI_PCCARD;
	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
fd238232	510	info->ri_latch = inb(info->p_dev->io.BasePort1 + UART_MSR) & UART_MSR_RI;
1da177e4 LT	511
	512	/* Turn on interrupts */
	513	outb(UART_IER_RLSI \| UART_IER_RDI \| UART_IER_THRI, iobase + UART_IER);
	514
	515	spin_unlock_irqrestore(&(info->lock), flags);
	516
	517	/* Timeout before it is safe to send the first HCI packet */
	518	msleep(2000);
	519
	520	/* Register HCI device */
	521	if (hci_register_dev(hdev) < 0) {
	522	BT_ERR("Can't register HCI device");
	523	info->hdev = NULL;
	524	hci_free_dev(hdev);
	525	return -ENODEV;
	526	}
	527
	528	return 0;
	529	}
	530
	531
	532	static int dtl1_close(dtl1_info_t *info)
	533	{
	534	unsigned long flags;
fd238232	535	unsigned int iobase = info->p_dev->io.BasePort1;
1da177e4 LT	536	struct hci_dev *hdev = info->hdev;
	537
	538	if (!hdev)
	539	return -ENODEV;
	540
	541	dtl1_hci_close(hdev);
	542
	543	spin_lock_irqsave(&(info->lock), flags);
	544
	545	/* Reset UART */
	546	outb(0, iobase + UART_MCR);
	547
	548	/* Turn off interrupts */
	549	outb(0, iobase + UART_IER);
	550
	551	spin_unlock_irqrestore(&(info->lock), flags);
	552
	553	if (hci_unregister_dev(hdev) < 0)
	554	BT_ERR("Can't unregister HCI device %s", hdev->name);
	555
	556	hci_free_dev(hdev);
	557
	558	return 0;
	559	}
	560
15b99ac1	561	static int dtl1_probe(struct pcmcia_device *link)
1da177e4 LT	562	{
1da177e4 LT	563	dtl1_info_t *info;
1da177e4 LT	564
1da177e4 LT	565	/* Create new info device */
089b1dbb	566	info = kzalloc(sizeof(*info), GFP_KERNEL);
1da177e4	567	if (!info)
f8cfa618	568	return -ENOMEM;
1da177e4	569
fba395ee	570	info->p_dev = link;
1da177e4 LT	571	link->priv = info;
	572
	573	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
	574	link->io.NumPorts1 = 8;
	575	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE \| IRQ_HANDLE_PRESENT;
	576	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
	577
	578	link->irq.Handler = dtl1_interrupt;
	579	link->irq.Instance = info;
	580
	581	link->conf.Attributes = CONF_ENABLE_IRQ;
1da177e4 LT	582	link->conf.IntType = INT_MEMORY_AND_IO;
1da177e4 LT	583
15b99ac1	584	return dtl1_config(link);
1da177e4 LT	585	}
	586
	587
fba395ee	588	static void dtl1_detach(struct pcmcia_device *link)
1da177e4 LT	589	{
1da177e4 LT	590	dtl1_info_t *info = link->priv;
1da177e4	591
e2d40963	592	dtl1_release(link);
1da177e4	593
1da177e4 LT	594	kfree(info);
	595	}
	596
fba395ee	597	static int get_tuple(struct pcmcia_device handle, tuple_t tuple, cisparse_t *parse)
1da177e4 LT	598	{
	599	int i;
	600
	601	i = pcmcia_get_tuple_data(handle, tuple);
	602	if (i != CS_SUCCESS)
	603	return i;
	604
	605	return pcmcia_parse_tuple(handle, tuple, parse);
	606	}
	607
fba395ee	608	static int first_tuple(struct pcmcia_device handle, tuple_t tuple, cisparse_t *parse)
1da177e4 LT	609	{
	610	if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
	611	return CS_NO_MORE_ITEMS;
	612	return get_tuple(handle, tuple, parse);
	613	}
	614
fba395ee	615	static int next_tuple(struct pcmcia_device handle, tuple_t tuple, cisparse_t *parse)
1da177e4 LT	616	{
	617	if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
	618	return CS_NO_MORE_ITEMS;
	619	return get_tuple(handle, tuple, parse);
	620	}
	621
15b99ac1	622	static int dtl1_config(struct pcmcia_device *link)
1da177e4	623	{
1da177e4 LT	624	dtl1_info_t *info = link->priv;
	625	tuple_t tuple;
	626	u_short buf[256];
	627	cisparse_t parse;
	628	cistpl_cftable_entry_t *cf = &parse.cftable_entry;
1da177e4 LT	629	int i, last_ret, last_fn;
	630
	631	tuple.TupleData = (cisdata_t *)buf;
	632	tuple.TupleOffset = 0;
	633	tuple.TupleDataMax = 255;
	634	tuple.Attributes = 0;
	635
	636	/* Get configuration register information */
	637	tuple.DesiredTuple = CISTPL_CONFIG;
fba395ee	638	last_ret = first_tuple(link, &tuple, &parse);
1da177e4 LT	639	if (last_ret != CS_SUCCESS) {
	640	last_fn = ParseTuple;
	641	goto cs_failed;
	642	}
	643	link->conf.ConfigBase = parse.config.base;
	644	link->conf.Present = parse.config.rmask[0];
	645
1da177e4 LT	646	tuple.TupleData = (cisdata_t *)buf;
	647	tuple.TupleOffset = 0;
	648	tuple.TupleDataMax = 255;
	649	tuple.Attributes = 0;
	650	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	651
	652	/* Look for a generic full-sized window */
	653	link->io.NumPorts1 = 8;
fba395ee	654	i = first_tuple(link, &tuple, &parse);
1da177e4 LT	655	while (i != CS_NO_MORE_ITEMS) {
	656	if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
	657	link->conf.ConfigIndex = cf->index;
	658	link->io.BasePort1 = cf->io.win[0].base;
	659	link->io.NumPorts1 = cf->io.win[0].len; /yo /
	660	link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
fba395ee	661	i = pcmcia_request_io(link, &link->io);
1da177e4 LT	662	if (i == CS_SUCCESS)
	663	break;
	664	}
fba395ee	665	i = next_tuple(link, &tuple, &parse);
1da177e4 LT	666	}
	667
	668	if (i != CS_SUCCESS) {
fba395ee	669	cs_error(link, RequestIO, i);
1da177e4 LT	670	goto failed;
	671	}
	672
fba395ee	673	i = pcmcia_request_irq(link, &link->irq);
1da177e4	674	if (i != CS_SUCCESS) {
fba395ee	675	cs_error(link, RequestIRQ, i);
1da177e4 LT	676	link->irq.AssignedIRQ = 0;
	677	}
	678
fba395ee	679	i = pcmcia_request_configuration(link, &link->conf);
1da177e4	680	if (i != CS_SUCCESS) {
fba395ee	681	cs_error(link, RequestConfiguration, i);
1da177e4 LT	682	goto failed;
	683	}
	684
	685	if (dtl1_open(info) != 0)
	686	goto failed;
	687
	688	strcpy(info->node.dev_name, info->hdev->name);
fd238232	689	link->dev_node = &info->node;
1da177e4	690
15b99ac1	691	return 0;
1da177e4 LT	692
1da177e4 LT	693	cs_failed:
fba395ee	694	cs_error(link, last_fn, last_ret);
1da177e4 LT	695
	696	failed:
	697	dtl1_release(link);
15b99ac1	698	return -ENODEV;
1da177e4 LT	699	}
	700
	701
fba395ee	702	static void dtl1_release(struct pcmcia_device *link)
1da177e4 LT	703	{
	704	dtl1_info_t *info = link->priv;
	705
e2d40963	706	dtl1_close(info);
1da177e4	707
fba395ee	708	pcmcia_disable_device(link);
1da177e4 LT	709	}
1da177e4 LT	710
1da177e4	711
88eca2e5 DB	712	static struct pcmcia_device_id dtl1_ids[] = {
	713	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
	714	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
725a6abf	715	PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
88eca2e5 DB	716	PCMCIA_DEVICE_NULL
	717	};
	718	MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
	719
1da177e4 LT	720	static struct pcmcia_driver dtl1_driver = {
	721	.owner = THIS_MODULE,
	722	.drv = {
	723	.name = "dtl1_cs",
	724	},
15b99ac1	725	.probe = dtl1_probe,
cc3b4866	726	.remove = dtl1_detach,
88eca2e5	727	.id_table = dtl1_ids,
1da177e4 LT	728	};
	729
	730	static int __init init_dtl1_cs(void)
	731	{
	732	return pcmcia_register_driver(&dtl1_driver);
	733	}
	734
	735
	736	static void __exit exit_dtl1_cs(void)
	737	{
	738	pcmcia_unregister_driver(&dtl1_driver);
1da177e4 LT	739	}
	740
	741	module_init(init_dtl1_cs);
	742	module_exit(exit_dtl1_cs);