X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fbluetooth%2Fhci_ldisc.c;h=613673b12fa6711cb8b749c8aea03cc0fc1c7b01;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=9075bbb56ad4322d123d42a8f5e77e68e7a964f2;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 9075bbb56..613673b12 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -1,33 +1,27 @@ -/* - BlueZ - Bluetooth protocol stack for Linux - Copyright (C) 2000-2001 Qualcomm Incorporated - - Written 2000,2001 by Maxim Krasnyansky - - 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; - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. - IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY - CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES - WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - - ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, - COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS - SOFTWARE IS DISCLAIMED. -*/ - /* - * Bluetooth HCI UART driver. * - * $Id: hci_ldisc.c,v 1.5 2002/10/02 18:37:20 maxk Exp $ + * Bluetooth HCI UART driver + * + * Copyright (C) 2000-2001 Qualcomm Incorporated + * Copyright (C) 2002-2003 Maxim Krasnyansky + * Copyright (C) 2004-2005 Marcel Holtmann + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * */ -#define VERSION "2.1" #include #include @@ -57,10 +51,10 @@ #ifndef CONFIG_BT_HCIUART_DEBUG #undef BT_DBG #define BT_DBG( A... ) -#undef BT_DMP -#define BT_DMP( A... ) #endif +#define VERSION "2.2" + static int reset = 0; static struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; @@ -74,6 +68,7 @@ int hci_uart_register_proto(struct hci_uart_proto *p) return -EEXIST; hup[p->id] = p; + return 0; } @@ -86,6 +81,7 @@ int hci_uart_unregister_proto(struct hci_uart_proto *p) return -EINVAL; hup[p->id] = NULL; + return 0; } @@ -93,13 +89,14 @@ static struct hci_uart_proto *hci_uart_get_proto(unsigned int id) { if (id >= HCI_UART_MAX_PROTO) return NULL; + return hup[id]; } static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) { struct hci_dev *hdev = hu->hdev; - + /* Update HCI stat counters */ switch (pkt_type) { case HCI_COMMAND_PKT: @@ -119,10 +116,12 @@ static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) { struct sk_buff *skb = hu->tx_skb; + if (!skb) skb = hu->proto->dequeue(hu); else hu->tx_skb = NULL; + return skb; } @@ -131,7 +130,7 @@ int hci_uart_tx_wakeup(struct hci_uart *hu) struct tty_struct *tty = hu->tty; struct hci_dev *hdev = hu->hdev; struct sk_buff *skb; - + if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); return 0; @@ -144,7 +143,7 @@ restart: while ((skb = hci_uart_dequeue(hu))) { int len; - + set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); len = tty->driver->write(tty, skb->data, skb->len); hdev->stat.byte_tx += len; @@ -154,11 +153,11 @@ restart: hu->tx_skb = skb; break; } - - hci_uart_tx_complete(hu, skb->pkt_type); + + hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type); kfree_skb(skb); - } - + } + if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) goto restart; @@ -175,6 +174,7 @@ static int hci_uart_open(struct hci_dev *hdev) /* Nothing to do for UART driver */ set_bit(HCI_RUNNING, &hdev->flags); + return 0; } @@ -231,11 +231,12 @@ static int hci_uart_send_frame(struct sk_buff *skb) hu = (struct hci_uart *) hdev->driver_data; tty = hu->tty; - BT_DBG("%s: type %d len %d", hdev->name, skb->pkt_type, skb->len); + BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); hu->proto->enqueue(hu, skb); hci_uart_tx_wakeup(hu); + return 0; } @@ -243,7 +244,8 @@ static void hci_uart_destruct(struct hci_dev *hdev) { struct hci_uart *hu; - if (!hdev) return; + if (!hdev) + return; BT_DBG("%s", hdev->name); @@ -270,20 +272,22 @@ static int hci_uart_tty_open(struct tty_struct *tty) if (hu) return -EEXIST; - if (!(hu = kmalloc(sizeof(struct hci_uart), GFP_KERNEL))) { + if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) { BT_ERR("Can't allocate controll structure"); return -ENFILE; } - memset(hu, 0, sizeof(struct hci_uart)); tty->disc_data = hu; hu->tty = tty; + tty->receive_room = 65536; spin_lock_init(&hu->rx_lock); /* Flush any pending characters in the driver and line discipline. */ + /* FIXME: why is this needed. Note don't use ldisc_ref here as the open path is before the ldisc is referencable */ + if (tty->ldisc.flush_buffer) tty->ldisc.flush_buffer(tty); @@ -345,20 +349,6 @@ static void hci_uart_tty_wakeup(struct tty_struct *tty) hci_uart_tx_wakeup(hu); } -/* hci_uart_tty_room() - * - * Callback function from tty driver. Return the amount of - * space left in the receiver's buffer to decide if remote - * transmitter is to be throttled. - * - * Arguments: tty pointer to associated tty instance data - * Return Value: number of bytes left in receive buffer - */ -static int hci_uart_tty_room (struct tty_struct *tty) -{ - return 65536; -} - /* hci_uart_tty_receive() * * Called by tty low level driver when receive data is @@ -374,13 +364,13 @@ static int hci_uart_tty_room (struct tty_struct *tty) static void hci_uart_tty_receive(struct tty_struct *tty, const __u8 *data, char *flags, int count) { struct hci_uart *hu = (void *)tty->disc_data; - + if (!hu || tty != hu->tty) return; if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) return; - + spin_lock(&hu->rx_lock); hu->proto->recv(hu, (void *) data, count); hu->hdev->stat.byte_rx += count; @@ -431,8 +421,8 @@ static int hci_uart_register_dev(struct hci_uart *hu) static int hci_uart_set_proto(struct hci_uart *hu, int id) { struct hci_uart_proto *p; - int err; - + int err; + p = hci_uart_get_proto(id); if (!p) return -EPROTONOSUPPORT; @@ -448,6 +438,7 @@ static int hci_uart_set_proto(struct hci_uart *hu, int id) p->close(hu); return err; } + return 0; } @@ -465,7 +456,7 @@ static int hci_uart_set_proto(struct hci_uart *hu, int id) * Return Value: Command dependent */ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file, - unsigned int cmd, unsigned long arg) + unsigned int cmd, unsigned long arg) { struct hci_uart *hu = (void *)tty->disc_data; int err = 0; @@ -485,14 +476,14 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file, return err; } tty->low_latency = 1; - } else + } else return -EBUSY; case HCIUARTGETPROTO: if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) return hu->proto->id; return -EUNATCH; - + default: err = n_tty_ioctl(tty, file, cmd, arg); break; @@ -504,28 +495,24 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file, /* * We don't provide read/write/poll interface for user space. */ -static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, unsigned char __user *buf, size_t nr) +static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, + unsigned char __user *buf, size_t nr) { return 0; } -static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, const unsigned char *data, size_t count) + +static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, + const unsigned char *data, size_t count) { return 0; } -static unsigned int hci_uart_tty_poll(struct tty_struct *tty, struct file *filp, poll_table *wait) + +static unsigned int hci_uart_tty_poll(struct tty_struct *tty, + struct file *filp, poll_table *wait) { return 0; } -#ifdef CONFIG_BT_HCIUART_H4 -int h4_init(void); -int h4_deinit(void); -#endif -#ifdef CONFIG_BT_HCIUART_BCSP -int bcsp_init(void); -int bcsp_deinit(void); -#endif - static int __init hci_uart_init(void) { static struct tty_ldisc hci_uart_ldisc; @@ -536,18 +523,17 @@ static int __init hci_uart_init(void) /* Register the tty discipline */ memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc)); - hci_uart_ldisc.magic = TTY_LDISC_MAGIC; - hci_uart_ldisc.name = "n_hci"; - hci_uart_ldisc.open = hci_uart_tty_open; - hci_uart_ldisc.close = hci_uart_tty_close; - hci_uart_ldisc.read = hci_uart_tty_read; - hci_uart_ldisc.write = hci_uart_tty_write; - hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; - hci_uart_ldisc.poll = hci_uart_tty_poll; - hci_uart_ldisc.receive_room= hci_uart_tty_room; - hci_uart_ldisc.receive_buf = hci_uart_tty_receive; - hci_uart_ldisc.write_wakeup= hci_uart_tty_wakeup; - hci_uart_ldisc.owner = THIS_MODULE; + hci_uart_ldisc.magic = TTY_LDISC_MAGIC; + hci_uart_ldisc.name = "n_hci"; + hci_uart_ldisc.open = hci_uart_tty_open; + hci_uart_ldisc.close = hci_uart_tty_close; + hci_uart_ldisc.read = hci_uart_tty_read; + hci_uart_ldisc.write = hci_uart_tty_write; + hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; + hci_uart_ldisc.poll = hci_uart_tty_poll; + hci_uart_ldisc.receive_buf = hci_uart_tty_receive; + hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; + hci_uart_ldisc.owner = THIS_MODULE; if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) { BT_ERR("HCI line discipline registration failed. (%d)", err); @@ -576,7 +562,7 @@ static void __exit hci_uart_exit(void) #endif /* Release tty registration of line discipline */ - if ((err = tty_register_ldisc(N_HCI, NULL))) + if ((err = tty_unregister_ldisc(N_HCI))) BT_ERR("Can't unregister HCI line discipline (%d)", err); }