1 files changed, 749 insertions, 0 deletions

diff --git a/drivers/bluetooth/bt3c_cs.c b/drivers/bluetooth/bt3c_cs.c
new file mode 100644
index 000000000..547138339
--- /dev/null
+++ b/drivers/bluetooth/bt3c_cs.c
@@ -0,0 +1,749 @@
+/*
+ *
+ *  Driver for the 3Com Bluetooth PCMCIA card
+ *
+ *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
+ *                           Jose Orlando Pereira <jop@di.uminho.pt>
+ *
+ *
+ *  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 <linux/device.h>
+#include <linux/firmware.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 the 3Com Bluetooth PCMCIA card");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("BT3CPCC.bin");
+
+
+
+/* ======================== Local structures ======================== */
+
+
+struct bt3c_info {
+	struct pcmcia_device *p_dev;
+
+	struct hci_dev *hdev;
+
+	spinlock_t lock;		/* For serializing operations */
+
+	struct sk_buff_head txq;
+	unsigned long tx_state;
+
+	unsigned long rx_state;
+	unsigned long rx_count;
+	struct sk_buff *rx_skb;
+};
+
+
+static int bt3c_config(struct pcmcia_device *link);
+static void bt3c_release(struct pcmcia_device *link);
+
+static void bt3c_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_PACKET_TYPE   0
+#define RECV_WAIT_EVENT_HEADER  1
+#define RECV_WAIT_ACL_HEADER    2
+#define RECV_WAIT_SCO_HEADER    3
+#define RECV_WAIT_DATA          4
+
+
+
+/* ======================== Special I/O functions ======================== */
+
+
+#define DATA_L   0
+#define DATA_H   1
+#define ADDR_L   2
+#define ADDR_H   3
+#define CONTROL  4
+
+
+static inline void bt3c_address(unsigned int iobase, unsigned short addr)
+{
+	outb(addr & 0xff, iobase + ADDR_L);
+	outb((addr >> 8) & 0xff, iobase + ADDR_H);
+}
+
+
+static inline void bt3c_put(unsigned int iobase, unsigned short value)
+{
+	outb(value & 0xff, iobase + DATA_L);
+	outb((value >> 8) & 0xff, iobase + DATA_H);
+}
+
+
+static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
+{
+	bt3c_address(iobase, addr);
+	bt3c_put(iobase, value);
+}
+
+
+static inline unsigned short bt3c_get(unsigned int iobase)
+{
+	unsigned short value = inb(iobase + DATA_L);
+
+	value |= inb(iobase + DATA_H) << 8;
+
+	return value;
+}
+
+
+static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
+{
+	bt3c_address(iobase, addr);
+
+	return bt3c_get(iobase);
+}
+
+
+
+/* ======================== Interrupt handling ======================== */
+
+
+static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
+{
+	int actual = 0;
+
+	bt3c_address(iobase, 0x7080);
+
+	/* Fill FIFO with current frame */
+	while (actual < len) {
+		/* Transmit next byte */
+		bt3c_put(iobase, buf[actual]);
+		actual++;
+	}
+
+	bt3c_io_write(iobase, 0x7005, actual);
+
+	return actual;
+}
+
+
+static void bt3c_write_wakeup(struct bt3c_info *info)
+{
+	if (!info) {
+		BT_ERR("Unknown device");
+		return;
+	}
+
+	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
+		return;
+
+	do {
+		unsigned int iobase = info->p_dev->resource[0]->start;
+		register struct sk_buff *skb;
+		int len;
+
+		if (!pcmcia_dev_present(info->p_dev))
+			break;
+
+		skb = skb_dequeue(&(info->txq));
+		if (!skb) {
+			clear_bit(XMIT_SENDING, &(info->tx_state));
+			break;
+		}
+
+		/* Send frame */
+		len = bt3c_write(iobase, 256, skb->data, skb->len);
+
+		if (len != skb->len)
+			BT_ERR("Very strange");
+
+		kfree_skb(skb);
+
+		info->hdev->stat.byte_tx += len;
+
+	} while (0);
+}
+
+
+static void bt3c_receive(struct bt3c_info *info)
+{
+	unsigned int iobase;
+	int size = 0, avail;
+
+	if (!info) {
+		BT_ERR("Unknown device");
+		return;
+	}
+
+	iobase = info->p_dev->resource[0]->start;
+
+	avail = bt3c_read(iobase, 0x7006);
+
+	bt3c_address(iobase, 0x7480);
+	while (size < avail) {
+		size++;
+		info->hdev->stat.byte_rx++;
+
+		/* Allocate packet */
+		if (!info->rx_skb) {
+			info->rx_state = RECV_WAIT_PACKET_TYPE;
+			info->rx_count = 0;
+			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+			if (!info->rx_skb) {
+				BT_ERR("Can't allocate mem for new packet");
+				return;
+			}
+		}
+
+
+		if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
+
+			hci_skb_pkt_type(info->rx_skb) = inb(iobase + DATA_L);
+			inb(iobase + DATA_H);
+
+			switch (hci_skb_pkt_type(info->rx_skb)) {
+
+			case HCI_EVENT_PKT:
+				info->rx_state = RECV_WAIT_EVENT_HEADER;
+				info->rx_count = HCI_EVENT_HDR_SIZE;
+				break;
+
+			case HCI_ACLDATA_PKT:
+				info->rx_state = RECV_WAIT_ACL_HEADER;
+				info->rx_count = HCI_ACL_HDR_SIZE;
+				break;
+
+			case HCI_SCODATA_PKT:
+				info->rx_state = RECV_WAIT_SCO_HEADER;
+				info->rx_count = HCI_SCO_HDR_SIZE;
+				break;
+
+			default:
+				/* Unknown packet */
+				BT_ERR("Unknown HCI packet with type 0x%02x received",
+				       hci_skb_pkt_type(info->rx_skb));
+				info->hdev->stat.err_rx++;
+
+				kfree_skb(info->rx_skb);
+				info->rx_skb = NULL;
+				break;
+
+			}
+
+		} else {
+
+			__u8 x = inb(iobase + DATA_L);
+
+			skb_put_u8(info->rx_skb, x);
+			inb(iobase + DATA_H);
+			info->rx_count--;
+
+			if (info->rx_count == 0) {
+
+				int dlen;
+				struct hci_event_hdr *eh;
+				struct hci_acl_hdr *ah;
+				struct hci_sco_hdr *sh;
+
+				switch (info->rx_state) {
+
+				case RECV_WAIT_EVENT_HEADER:
+					eh = hci_event_hdr(info->rx_skb);
+					info->rx_state = RECV_WAIT_DATA;
+					info->rx_count = eh->plen;
+					break;
+
+				case RECV_WAIT_ACL_HEADER:
+					ah = hci_acl_hdr(info->rx_skb);
+					dlen = __le16_to_cpu(ah->dlen);
+					info->rx_state = RECV_WAIT_DATA;
+					info->rx_count = dlen;
+					break;
+
+				case RECV_WAIT_SCO_HEADER:
+					sh = hci_sco_hdr(info->rx_skb);
+					info->rx_state = RECV_WAIT_DATA;
+					info->rx_count = sh->dlen;
+					break;
+
+				case RECV_WAIT_DATA:
+					hci_recv_frame(info->hdev, info->rx_skb);
+					info->rx_skb = NULL;
+					break;
+
+				}
+
+			}
+
+		}
+
+	}
+
+	bt3c_io_write(iobase, 0x7006, 0x0000);
+}
+
+
+static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
+{
+	struct bt3c_info *info = dev_inst;
+	unsigned int iobase;
+	int iir;
+	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 + CONTROL);
+	if (iir & 0x80) {
+		int stat = bt3c_read(iobase, 0x7001);
+
+		if ((stat & 0xff) == 0x7f) {
+			BT_ERR("Very strange (stat=0x%04x)", stat);
+		} else if ((stat & 0xff) != 0xff) {
+			if (stat & 0x0020) {
+				int status = bt3c_read(iobase, 0x7002) & 0x10;
+				bt_dev_info(info->hdev, "Antenna %s",
+							status ? "out" : "in");
+			}
+			if (stat & 0x0001)
+				bt3c_receive(info);
+			if (stat & 0x0002) {
+				clear_bit(XMIT_SENDING, &(info->tx_state));
+				bt3c_write_wakeup(info);
+			}
+
+			bt3c_io_write(iobase, 0x7001, 0x0000);
+
+			outb(iir, iobase + CONTROL);
+		}
+		r = IRQ_HANDLED;
+	}
+
+	spin_unlock(&(info->lock));
+
+	return r;
+}
+
+
+
+/* ======================== HCI interface ======================== */
+
+
+static int bt3c_hci_flush(struct hci_dev *hdev)
+{
+	struct bt3c_info *info = hci_get_drvdata(hdev);
+
+	/* Drop TX queue */
+	skb_queue_purge(&(info->txq));
+
+	return 0;
+}
+
+
+static int bt3c_hci_open(struct hci_dev *hdev)
+{
+	return 0;
+}
+
+
+static int bt3c_hci_close(struct hci_dev *hdev)
+{
+	bt3c_hci_flush(hdev);
+
+	return 0;
+}
+
+
+static int bt3c_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct bt3c_info *info = hci_get_drvdata(hdev);
+	unsigned long flags;
+
+	switch (hci_skb_pkt_type(skb)) {
+	case HCI_COMMAND_PKT:
+		hdev->stat.cmd_tx++;
+		break;
+	case HCI_ACLDATA_PKT:
+		hdev->stat.acl_tx++;
+		break;
+	case HCI_SCODATA_PKT:
+		hdev->stat.sco_tx++;
+		break;
+	}
+
+	/* Prepend skb with frame type */
+	memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
+	skb_queue_tail(&(info->txq), skb);
+
+	spin_lock_irqsave(&(info->lock), flags);
+
+	bt3c_write_wakeup(info);
+
+	spin_unlock_irqrestore(&(info->lock), flags);
+
+	return 0;
+}
+
+
+
+/* ======================== Card services HCI interaction ======================== */
+
+
+static int bt3c_load_firmware(struct bt3c_info *info,
+			      const unsigned char *firmware,
+			      int count)
+{
+	char *ptr = (char *) firmware;
+	char b[9];
+	unsigned int iobase, tmp, tn;
+	unsigned long size, addr, fcs;
+	int i, err = 0;
+
+	iobase = info->p_dev->resource[0]->start;
+
+	/* Reset */
+	bt3c_io_write(iobase, 0x8040, 0x0404);
+	bt3c_io_write(iobase, 0x8040, 0x0400);
+
+	udelay(1);
+
+	bt3c_io_write(iobase, 0x8040, 0x0404);
+
+	udelay(17);
+
+	/* Load */
+	while (count) {
+		if (ptr[0] != 'S') {
+			BT_ERR("Bad address in firmware");
+			err = -EFAULT;
+			goto error;
+		}
+
+		memset(b, 0, sizeof(b));
+		memcpy(b, ptr + 2, 2);
+		if (kstrtoul(b, 16, &size) < 0)
+			return -EINVAL;
+
+		memset(b, 0, sizeof(b));
+		memcpy(b, ptr + 4, 8);
+		if (kstrtoul(b, 16, &addr) < 0)
+			return -EINVAL;
+
+		memset(b, 0, sizeof(b));
+		memcpy(b, ptr + (size * 2) + 2, 2);
+		if (kstrtoul(b, 16, &fcs) < 0)
+			return -EINVAL;
+
+		memset(b, 0, sizeof(b));
+		for (tmp = 0, i = 0; i < size; i++) {
+			memcpy(b, ptr + (i * 2) + 2, 2);
+			if (kstrtouint(b, 16, &tn))
+				return -EINVAL;
+			tmp += tn;
+		}
+
+		if (((tmp + fcs) & 0xff) != 0xff) {
+			BT_ERR("Checksum error in firmware");
+			err = -EILSEQ;
+			goto error;
+		}
+
+		if (ptr[1] == '3') {
+			bt3c_address(iobase, addr);
+
+			memset(b, 0, sizeof(b));
+			for (i = 0; i < (size - 4) / 2; i++) {
+				memcpy(b, ptr + (i * 4) + 12, 4);
+				if (kstrtouint(b, 16, &tmp))
+					return -EINVAL;
+				bt3c_put(iobase, tmp);
+			}
+		}
+
+		ptr   += (size * 2) + 6;
+		count -= (size * 2) + 6;
+	}
+
+	udelay(17);
+
+	/* Boot */
+	bt3c_address(iobase, 0x3000);
+	outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
+
+error:
+	udelay(17);
+
+	/* Clear */
+	bt3c_io_write(iobase, 0x7006, 0x0000);
+	bt3c_io_write(iobase, 0x7005, 0x0000);
+	bt3c_io_write(iobase, 0x7001, 0x0000);
+
+	return err;
+}
+
+
+static int bt3c_open(struct bt3c_info *info)
+{
+	const struct firmware *firmware;
+	struct hci_dev *hdev;
+	int err;
+
+	spin_lock_init(&(info->lock));
+
+	skb_queue_head_init(&(info->txq));
+
+	info->rx_state = RECV_WAIT_PACKET_TYPE;
+	info->rx_count = 0;
+	info->rx_skb = NULL;
+
+	/* 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  = bt3c_hci_open;
+	hdev->close = bt3c_hci_close;
+	hdev->flush = bt3c_hci_flush;
+	hdev->send  = bt3c_hci_send_frame;
+
+	/* Load firmware */
+	err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
+	if (err < 0) {
+		BT_ERR("Firmware request failed");
+		goto error;
+	}
+
+	err = bt3c_load_firmware(info, firmware->data, firmware->size);
+
+	release_firmware(firmware);
+
+	if (err < 0) {
+		BT_ERR("Firmware loading failed");
+		goto error;
+	}
+
+	/* Timeout before it is safe to send the first HCI packet */
+	msleep(1000);
+
+	/* Register HCI device */
+	err = hci_register_dev(hdev);
+	if (err < 0) {
+		BT_ERR("Can't register HCI device");
+		goto error;
+	}
+
+	return 0;
+
+error:
+	info->hdev = NULL;
+	hci_free_dev(hdev);
+	return err;
+}
+
+
+static int bt3c_close(struct bt3c_info *info)
+{
+	struct hci_dev *hdev = info->hdev;
+
+	if (!hdev)
+		return -ENODEV;
+
+	bt3c_hci_close(hdev);
+
+	hci_unregister_dev(hdev);
+	hci_free_dev(hdev);
+
+	return 0;
+}
+
+static int bt3c_probe(struct pcmcia_device *link)
+{
+	struct bt3c_info *info;
+
+	/* Create new info device */
+	info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->p_dev = link;
+	link->priv = info;
+
+	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
+		CONF_AUTO_SET_IO;
+
+	return bt3c_config(link);
+}
+
+
+static void bt3c_detach(struct pcmcia_device *link)
+{
+	bt3c_release(link);
+}
+
+static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
+{
+	int *try = priv_data;
+
+	if (!try)
+		p_dev->io_lines = 16;
+
+	if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
+		return -EINVAL;
+
+	p_dev->resource[0]->end = 8;
+	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 bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
+				      void *priv_data)
+{
+	static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
+	int j;
+
+	if (p_dev->io_lines > 3)
+		return -ENODEV;
+
+	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
+	p_dev->resource[0]->end = 8;
+
+	for (j = 0; j < 5; j++) {
+		p_dev->resource[0]->start = base[j];
+		p_dev->io_lines = base[j] ? 16 : 3;
+		if (!pcmcia_request_io(p_dev))
+			return 0;
+	}
+	return -ENODEV;
+}
+
+static int bt3c_config(struct pcmcia_device *link)
+{
+	struct bt3c_info *info = link->priv;
+	int i;
+	unsigned long try;
+
+	/* First pass: look for a config entry that looks normal.
+	 * Two tries: without IO aliases, then with aliases
+	 */
+	for (try = 0; try < 2; try++)
+		if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
+			goto found_port;
+
+	/* Second pass: try to find an entry that isn't picky about
+	 * its base address, then try to grab any standard serial port
+	 * address, and finally try to get any free port.
+	 */
+	if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
+		goto found_port;
+
+	BT_ERR("No usable port range found");
+	goto failed;
+
+found_port:
+	i = pcmcia_request_irq(link, &bt3c_interrupt);
+	if (i != 0)
+		goto failed;
+
+	i = pcmcia_enable_device(link);
+	if (i != 0)
+		goto failed;
+
+	if (bt3c_open(info) != 0)
+		goto failed;
+
+	return 0;
+
+failed:
+	bt3c_release(link);
+	return -ENODEV;
+}
+
+
+static void bt3c_release(struct pcmcia_device *link)
+{
+	struct bt3c_info *info = link->priv;
+
+	bt3c_close(info);
+
+	pcmcia_disable_device(link);
+}
+
+
+static const struct pcmcia_device_id bt3c_ids[] = {
+	PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
+	PCMCIA_DEVICE_NULL
+};
+MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
+
+static struct pcmcia_driver bt3c_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "bt3c_cs",
+	.probe		= bt3c_probe,
+	.remove		= bt3c_detach,
+	.id_table	= bt3c_ids,
+};
+module_pcmcia_driver(bt3c_driver);