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932 lines
20 KiB
932 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
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* |
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* Bluetooth HCI UART driver |
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* |
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* Copyright (C) 2000-2001 Qualcomm Incorporated |
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* Copyright (C) 2002-2003 Maxim Krasnyansky <[email protected]> |
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* Copyright (C) 2004-2005 Marcel Holtmann <[email protected]> |
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*/ |
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|
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#include <linux/module.h> |
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|
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/types.h> |
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#include <linux/fcntl.h> |
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#include <linux/interrupt.h> |
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#include <linux/ptrace.h> |
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#include <linux/poll.h> |
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|
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#include <linux/slab.h> |
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#include <linux/tty.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/signal.h> |
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#include <linux/ioctl.h> |
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#include <linux/skbuff.h> |
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#include <linux/firmware.h> |
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#include <linux/serdev.h> |
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|
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#include <net/bluetooth/bluetooth.h> |
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#include <net/bluetooth/hci_core.h> |
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|
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#include "btintel.h" |
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#include "btbcm.h" |
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#include "hci_uart.h" |
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|
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#define VERSION "2.3" |
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|
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static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; |
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|
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int hci_uart_register_proto(const struct hci_uart_proto *p) |
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{ |
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if (p->id >= HCI_UART_MAX_PROTO) |
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return -EINVAL; |
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|
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if (hup[p->id]) |
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return -EEXIST; |
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|
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hup[p->id] = p; |
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|
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BT_INFO("HCI UART protocol %s registered", p->name); |
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|
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return 0; |
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} |
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|
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int hci_uart_unregister_proto(const struct hci_uart_proto *p) |
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{ |
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if (p->id >= HCI_UART_MAX_PROTO) |
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return -EINVAL; |
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|
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if (!hup[p->id]) |
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return -EINVAL; |
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|
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hup[p->id] = NULL; |
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|
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return 0; |
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} |
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|
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static const struct hci_uart_proto *hci_uart_get_proto(unsigned int id) |
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{ |
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if (id >= HCI_UART_MAX_PROTO) |
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return NULL; |
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|
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return hup[id]; |
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} |
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|
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static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) |
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{ |
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struct hci_dev *hdev = hu->hdev; |
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|
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/* Update HCI stat counters */ |
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switch (pkt_type) { |
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case HCI_COMMAND_PKT: |
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hdev->stat.cmd_tx++; |
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break; |
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|
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case HCI_ACLDATA_PKT: |
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hdev->stat.acl_tx++; |
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break; |
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|
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case HCI_SCODATA_PKT: |
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hdev->stat.sco_tx++; |
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break; |
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} |
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} |
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|
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static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) |
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{ |
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struct sk_buff *skb = hu->tx_skb; |
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|
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if (!skb) { |
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percpu_down_read(&hu->proto_lock); |
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|
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if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
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skb = hu->proto->dequeue(hu); |
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percpu_up_read(&hu->proto_lock); |
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} else { |
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hu->tx_skb = NULL; |
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} |
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return skb; |
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} |
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int hci_uart_tx_wakeup(struct hci_uart *hu) |
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{ |
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/* This may be called in an IRQ context, so we can't sleep. Therefore |
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* we try to acquire the lock only, and if that fails we assume the |
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* tty is being closed because that is the only time the write lock is |
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* acquired. If, however, at some point in the future the write lock |
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* is also acquired in other situations, then this must be revisited. |
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*/ |
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if (!percpu_down_read_trylock(&hu->proto_lock)) |
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return 0; |
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|
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if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
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goto no_schedule; |
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set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); |
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if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) |
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goto no_schedule; |
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BT_DBG(""); |
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schedule_work(&hu->write_work); |
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|
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no_schedule: |
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percpu_up_read(&hu->proto_lock); |
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|
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(hci_uart_tx_wakeup); |
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static void hci_uart_write_work(struct work_struct *work) |
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{ |
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struct hci_uart *hu = container_of(work, struct hci_uart, write_work); |
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struct tty_struct *tty = hu->tty; |
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struct hci_dev *hdev = hu->hdev; |
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struct sk_buff *skb; |
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|
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/* REVISIT: should we cope with bad skbs or ->write() returning |
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* and error value ? |
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*/ |
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|
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restart: |
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clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); |
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|
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while ((skb = hci_uart_dequeue(hu))) { |
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int len; |
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|
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set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
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len = tty->ops->write(tty, skb->data, skb->len); |
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hdev->stat.byte_tx += len; |
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|
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skb_pull(skb, len); |
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if (skb->len) { |
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hu->tx_skb = skb; |
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break; |
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} |
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hci_uart_tx_complete(hu, hci_skb_pkt_type(skb)); |
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kfree_skb(skb); |
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} |
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clear_bit(HCI_UART_SENDING, &hu->tx_state); |
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if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
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goto restart; |
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wake_up_bit(&hu->tx_state, HCI_UART_SENDING); |
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} |
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|
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void hci_uart_init_work(struct work_struct *work) |
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{ |
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struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); |
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int err; |
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struct hci_dev *hdev; |
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|
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if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
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return; |
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err = hci_register_dev(hu->hdev); |
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if (err < 0) { |
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BT_ERR("Can't register HCI device"); |
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clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
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hu->proto->close(hu); |
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hdev = hu->hdev; |
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hu->hdev = NULL; |
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hci_free_dev(hdev); |
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return; |
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} |
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set_bit(HCI_UART_REGISTERED, &hu->flags); |
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} |
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int hci_uart_init_ready(struct hci_uart *hu) |
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{ |
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if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
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return -EALREADY; |
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schedule_work(&hu->init_ready); |
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return 0; |
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} |
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int hci_uart_wait_until_sent(struct hci_uart *hu) |
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{ |
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return wait_on_bit_timeout(&hu->tx_state, HCI_UART_SENDING, |
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TASK_INTERRUPTIBLE, |
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msecs_to_jiffies(2000)); |
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} |
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|
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/* ------- Interface to HCI layer ------ */ |
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/* Reset device */ |
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static int hci_uart_flush(struct hci_dev *hdev) |
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{ |
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struct hci_uart *hu = hci_get_drvdata(hdev); |
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struct tty_struct *tty = hu->tty; |
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BT_DBG("hdev %p tty %p", hdev, tty); |
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if (hu->tx_skb) { |
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kfree_skb(hu->tx_skb); hu->tx_skb = NULL; |
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} |
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/* Flush any pending characters in the driver and discipline. */ |
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tty_ldisc_flush(tty); |
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tty_driver_flush_buffer(tty); |
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percpu_down_read(&hu->proto_lock); |
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if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
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hu->proto->flush(hu); |
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percpu_up_read(&hu->proto_lock); |
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return 0; |
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} |
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/* Initialize device */ |
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static int hci_uart_open(struct hci_dev *hdev) |
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{ |
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BT_DBG("%s %p", hdev->name, hdev); |
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|
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/* Undo clearing this from hci_uart_close() */ |
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hdev->flush = hci_uart_flush; |
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return 0; |
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} |
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/* Close device */ |
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static int hci_uart_close(struct hci_dev *hdev) |
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{ |
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BT_DBG("hdev %p", hdev); |
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|
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hci_uart_flush(hdev); |
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hdev->flush = NULL; |
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return 0; |
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} |
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|
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/* Send frames from HCI layer */ |
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static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
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{ |
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struct hci_uart *hu = hci_get_drvdata(hdev); |
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|
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BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb), |
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skb->len); |
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percpu_down_read(&hu->proto_lock); |
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if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) { |
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percpu_up_read(&hu->proto_lock); |
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return -EUNATCH; |
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} |
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hu->proto->enqueue(hu, skb); |
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percpu_up_read(&hu->proto_lock); |
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hci_uart_tx_wakeup(hu); |
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return 0; |
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} |
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/* Check the underlying device or tty has flow control support */ |
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bool hci_uart_has_flow_control(struct hci_uart *hu) |
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{ |
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/* serdev nodes check if the needed operations are present */ |
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if (hu->serdev) |
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return true; |
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|
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if (hu->tty->driver->ops->tiocmget && hu->tty->driver->ops->tiocmset) |
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return true; |
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|
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return false; |
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} |
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/* Flow control or un-flow control the device */ |
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void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) |
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{ |
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struct tty_struct *tty = hu->tty; |
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struct ktermios ktermios; |
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int status; |
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unsigned int set = 0; |
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unsigned int clear = 0; |
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if (hu->serdev) { |
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serdev_device_set_flow_control(hu->serdev, !enable); |
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serdev_device_set_rts(hu->serdev, !enable); |
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return; |
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} |
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if (enable) { |
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/* Disable hardware flow control */ |
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ktermios = tty->termios; |
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ktermios.c_cflag &= ~CRTSCTS; |
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status = tty_set_termios(tty, &ktermios); |
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BT_DBG("Disabling hardware flow control: %s", |
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status ? "failed" : "success"); |
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|
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/* Clear RTS to prevent the device from sending */ |
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/* Most UARTs need OUT2 to enable interrupts */ |
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status = tty->driver->ops->tiocmget(tty); |
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BT_DBG("Current tiocm 0x%x", status); |
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set &= ~(TIOCM_OUT2 | TIOCM_RTS); |
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clear = ~set; |
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set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | |
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TIOCM_OUT2 | TIOCM_LOOP; |
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clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | |
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TIOCM_OUT2 | TIOCM_LOOP; |
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status = tty->driver->ops->tiocmset(tty, set, clear); |
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BT_DBG("Clearing RTS: %s", status ? "failed" : "success"); |
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} else { |
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/* Set RTS to allow the device to send again */ |
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status = tty->driver->ops->tiocmget(tty); |
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BT_DBG("Current tiocm 0x%x", status); |
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set |= (TIOCM_OUT2 | TIOCM_RTS); |
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clear = ~set; |
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set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | |
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TIOCM_OUT2 | TIOCM_LOOP; |
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clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | |
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TIOCM_OUT2 | TIOCM_LOOP; |
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status = tty->driver->ops->tiocmset(tty, set, clear); |
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BT_DBG("Setting RTS: %s", status ? "failed" : "success"); |
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|
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/* Re-enable hardware flow control */ |
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ktermios = tty->termios; |
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ktermios.c_cflag |= CRTSCTS; |
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status = tty_set_termios(tty, &ktermios); |
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BT_DBG("Enabling hardware flow control: %s", |
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status ? "failed" : "success"); |
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} |
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} |
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|
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void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, |
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unsigned int oper_speed) |
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{ |
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hu->init_speed = init_speed; |
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hu->oper_speed = oper_speed; |
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} |
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|
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void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) |
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{ |
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struct tty_struct *tty = hu->tty; |
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struct ktermios ktermios; |
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|
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ktermios = tty->termios; |
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ktermios.c_cflag &= ~CBAUD; |
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tty_termios_encode_baud_rate(&ktermios, speed, speed); |
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|
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/* tty_set_termios() return not checked as it is always 0 */ |
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tty_set_termios(tty, &ktermios); |
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BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name, |
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tty->termios.c_ispeed, tty->termios.c_ospeed); |
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} |
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|
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static int hci_uart_setup(struct hci_dev *hdev) |
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{ |
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struct hci_uart *hu = hci_get_drvdata(hdev); |
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struct hci_rp_read_local_version *ver; |
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struct sk_buff *skb; |
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unsigned int speed; |
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int err; |
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|
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/* Init speed if any */ |
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if (hu->init_speed) |
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speed = hu->init_speed; |
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else if (hu->proto->init_speed) |
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speed = hu->proto->init_speed; |
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else |
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speed = 0; |
|
|
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if (speed) |
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hci_uart_set_baudrate(hu, speed); |
|
|
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/* Operational speed if any */ |
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if (hu->oper_speed) |
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speed = hu->oper_speed; |
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else if (hu->proto->oper_speed) |
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speed = hu->proto->oper_speed; |
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else |
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speed = 0; |
|
|
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if (hu->proto->set_baudrate && speed) { |
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err = hu->proto->set_baudrate(hu, speed); |
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if (!err) |
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hci_uart_set_baudrate(hu, speed); |
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} |
|
|
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if (hu->proto->setup) |
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return hu->proto->setup(hu); |
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|
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if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) |
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return 0; |
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skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, |
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HCI_INIT_TIMEOUT); |
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if (IS_ERR(skb)) { |
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BT_ERR("%s: Reading local version information failed (%ld)", |
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hdev->name, PTR_ERR(skb)); |
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return 0; |
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} |
|
|
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if (skb->len != sizeof(*ver)) { |
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BT_ERR("%s: Event length mismatch for version information", |
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hdev->name); |
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goto done; |
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} |
|
|
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ver = (struct hci_rp_read_local_version *)skb->data; |
|
|
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switch (le16_to_cpu(ver->manufacturer)) { |
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#ifdef CONFIG_BT_HCIUART_INTEL |
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case 2: |
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hdev->set_bdaddr = btintel_set_bdaddr; |
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btintel_check_bdaddr(hdev); |
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break; |
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#endif |
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#ifdef CONFIG_BT_HCIUART_BCM |
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case 15: |
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hdev->set_bdaddr = btbcm_set_bdaddr; |
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btbcm_check_bdaddr(hdev); |
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break; |
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#endif |
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default: |
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break; |
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} |
|
|
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done: |
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kfree_skb(skb); |
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return 0; |
|
} |
|
|
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/* ------ LDISC part ------ */ |
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/* hci_uart_tty_open |
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* |
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* Called when line discipline changed to HCI_UART. |
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* |
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* Arguments: |
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* tty pointer to tty info structure |
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* Return Value: |
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* 0 if success, otherwise error code |
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*/ |
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static int hci_uart_tty_open(struct tty_struct *tty) |
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{ |
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struct hci_uart *hu; |
|
|
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BT_DBG("tty %p", tty); |
|
|
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/* Error if the tty has no write op instead of leaving an exploitable |
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* hole |
|
*/ |
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if (tty->ops->write == NULL) |
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return -EOPNOTSUPP; |
|
|
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hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
|
if (!hu) { |
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BT_ERR("Can't allocate control structure"); |
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return -ENFILE; |
|
} |
|
|
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tty->disc_data = hu; |
|
hu->tty = tty; |
|
tty->receive_room = 65536; |
|
|
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/* disable alignment support by default */ |
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hu->alignment = 1; |
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hu->padding = 0; |
|
|
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INIT_WORK(&hu->init_ready, hci_uart_init_work); |
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INIT_WORK(&hu->write_work, hci_uart_write_work); |
|
|
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percpu_init_rwsem(&hu->proto_lock); |
|
|
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/* Flush any pending characters in the driver */ |
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tty_driver_flush_buffer(tty); |
|
|
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return 0; |
|
} |
|
|
|
/* hci_uart_tty_close() |
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* |
|
* Called when the line discipline is changed to something |
|
* else, the tty is closed, or the tty detects a hangup. |
|
*/ |
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static void hci_uart_tty_close(struct tty_struct *tty) |
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{ |
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struct hci_uart *hu = tty->disc_data; |
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struct hci_dev *hdev; |
|
|
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BT_DBG("tty %p", tty); |
|
|
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/* Detach from the tty */ |
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tty->disc_data = NULL; |
|
|
|
if (!hu) |
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return; |
|
|
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hdev = hu->hdev; |
|
if (hdev) |
|
hci_uart_close(hdev); |
|
|
|
if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) { |
|
percpu_down_write(&hu->proto_lock); |
|
clear_bit(HCI_UART_PROTO_READY, &hu->flags); |
|
percpu_up_write(&hu->proto_lock); |
|
|
|
cancel_work_sync(&hu->init_ready); |
|
cancel_work_sync(&hu->write_work); |
|
|
|
if (hdev) { |
|
if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
|
hci_unregister_dev(hdev); |
|
hci_free_dev(hdev); |
|
} |
|
hu->proto->close(hu); |
|
} |
|
clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
|
|
|
percpu_free_rwsem(&hu->proto_lock); |
|
|
|
kfree(hu); |
|
} |
|
|
|
/* hci_uart_tty_wakeup() |
|
* |
|
* Callback for transmit wakeup. Called when low level |
|
* device driver can accept more send data. |
|
* |
|
* Arguments: tty pointer to associated tty instance data |
|
* Return Value: None |
|
*/ |
|
static void hci_uart_tty_wakeup(struct tty_struct *tty) |
|
{ |
|
struct hci_uart *hu = tty->disc_data; |
|
|
|
BT_DBG(""); |
|
|
|
if (!hu) |
|
return; |
|
|
|
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
|
|
|
if (tty != hu->tty) |
|
return; |
|
|
|
if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) |
|
hci_uart_tx_wakeup(hu); |
|
} |
|
|
|
/* hci_uart_tty_receive() |
|
* |
|
* Called by tty low level driver when receive data is |
|
* available. |
|
* |
|
* Arguments: tty pointer to tty isntance data |
|
* data pointer to received data |
|
* flags pointer to flags for data |
|
* count count of received data in bytes |
|
* |
|
* Return Value: None |
|
*/ |
|
static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, |
|
char *flags, int count) |
|
{ |
|
struct hci_uart *hu = tty->disc_data; |
|
|
|
if (!hu || tty != hu->tty) |
|
return; |
|
|
|
percpu_down_read(&hu->proto_lock); |
|
|
|
if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) { |
|
percpu_up_read(&hu->proto_lock); |
|
return; |
|
} |
|
|
|
/* It does not need a lock here as it is already protected by a mutex in |
|
* tty caller |
|
*/ |
|
hu->proto->recv(hu, data, count); |
|
percpu_up_read(&hu->proto_lock); |
|
|
|
if (hu->hdev) |
|
hu->hdev->stat.byte_rx += count; |
|
|
|
tty_unthrottle(tty); |
|
} |
|
|
|
static int hci_uart_register_dev(struct hci_uart *hu) |
|
{ |
|
struct hci_dev *hdev; |
|
int err; |
|
|
|
BT_DBG(""); |
|
|
|
/* Initialize and register HCI device */ |
|
hdev = hci_alloc_dev(); |
|
if (!hdev) { |
|
BT_ERR("Can't allocate HCI device"); |
|
return -ENOMEM; |
|
} |
|
|
|
hu->hdev = hdev; |
|
|
|
hdev->bus = HCI_UART; |
|
hci_set_drvdata(hdev, hu); |
|
|
|
/* Only when vendor specific setup callback is provided, consider |
|
* the manufacturer information valid. This avoids filling in the |
|
* value for Ericsson when nothing is specified. |
|
*/ |
|
if (hu->proto->setup) |
|
hdev->manufacturer = hu->proto->manufacturer; |
|
|
|
hdev->open = hci_uart_open; |
|
hdev->close = hci_uart_close; |
|
hdev->flush = hci_uart_flush; |
|
hdev->send = hci_uart_send_frame; |
|
hdev->setup = hci_uart_setup; |
|
SET_HCIDEV_DEV(hdev, hu->tty->dev); |
|
|
|
if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
|
set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); |
|
|
|
if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
|
set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); |
|
|
|
if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
|
set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
|
|
|
if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
|
hdev->dev_type = HCI_AMP; |
|
else |
|
hdev->dev_type = HCI_PRIMARY; |
|
|
|
/* Only call open() for the protocol after hdev is fully initialized as |
|
* open() (or a timer/workqueue it starts) may attempt to reference it. |
|
*/ |
|
err = hu->proto->open(hu); |
|
if (err) { |
|
hu->hdev = NULL; |
|
hci_free_dev(hdev); |
|
return err; |
|
} |
|
|
|
if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
|
return 0; |
|
|
|
if (hci_register_dev(hdev) < 0) { |
|
BT_ERR("Can't register HCI device"); |
|
hu->proto->close(hu); |
|
hu->hdev = NULL; |
|
hci_free_dev(hdev); |
|
return -ENODEV; |
|
} |
|
|
|
set_bit(HCI_UART_REGISTERED, &hu->flags); |
|
|
|
return 0; |
|
} |
|
|
|
static int hci_uart_set_proto(struct hci_uart *hu, int id) |
|
{ |
|
const struct hci_uart_proto *p; |
|
int err; |
|
|
|
p = hci_uart_get_proto(id); |
|
if (!p) |
|
return -EPROTONOSUPPORT; |
|
|
|
hu->proto = p; |
|
|
|
err = hci_uart_register_dev(hu); |
|
if (err) { |
|
return err; |
|
} |
|
|
|
set_bit(HCI_UART_PROTO_READY, &hu->flags); |
|
return 0; |
|
} |
|
|
|
static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
|
{ |
|
unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | |
|
BIT(HCI_UART_RESET_ON_INIT) | |
|
BIT(HCI_UART_CREATE_AMP) | |
|
BIT(HCI_UART_INIT_PENDING) | |
|
BIT(HCI_UART_EXT_CONFIG) | |
|
BIT(HCI_UART_VND_DETECT); |
|
|
|
if (flags & ~valid_flags) |
|
return -EINVAL; |
|
|
|
hu->hdev_flags = flags; |
|
|
|
return 0; |
|
} |
|
|
|
/* hci_uart_tty_ioctl() |
|
* |
|
* Process IOCTL system call for the tty device. |
|
* |
|
* Arguments: |
|
* |
|
* tty pointer to tty instance data |
|
* file pointer to open file object for device |
|
* cmd IOCTL command code |
|
* arg argument for IOCTL call (cmd dependent) |
|
* |
|
* Return Value: Command dependent |
|
*/ |
|
static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, |
|
unsigned int cmd, unsigned long arg) |
|
{ |
|
struct hci_uart *hu = tty->disc_data; |
|
int err = 0; |
|
|
|
BT_DBG(""); |
|
|
|
/* Verify the status of the device */ |
|
if (!hu) |
|
return -EBADF; |
|
|
|
switch (cmd) { |
|
case HCIUARTSETPROTO: |
|
if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
|
err = hci_uart_set_proto(hu, arg); |
|
if (err) |
|
clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
|
} else |
|
err = -EBUSY; |
|
break; |
|
|
|
case HCIUARTGETPROTO: |
|
if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
|
err = hu->proto->id; |
|
else |
|
err = -EUNATCH; |
|
break; |
|
|
|
case HCIUARTGETDEVICE: |
|
if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
|
err = hu->hdev->id; |
|
else |
|
err = -EUNATCH; |
|
break; |
|
|
|
case HCIUARTSETFLAGS: |
|
if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
|
err = -EBUSY; |
|
else |
|
err = hci_uart_set_flags(hu, arg); |
|
break; |
|
|
|
case HCIUARTGETFLAGS: |
|
err = hu->hdev_flags; |
|
break; |
|
|
|
default: |
|
err = n_tty_ioctl_helper(tty, file, cmd, arg); |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
/* |
|
* 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 *buf, size_t nr, |
|
void **cookie, unsigned long offset) |
|
{ |
|
return 0; |
|
} |
|
|
|
static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, |
|
const unsigned char *data, size_t count) |
|
{ |
|
return 0; |
|
} |
|
|
|
static __poll_t hci_uart_tty_poll(struct tty_struct *tty, |
|
struct file *filp, poll_table *wait) |
|
{ |
|
return 0; |
|
} |
|
|
|
static struct tty_ldisc_ops hci_uart_ldisc = { |
|
.owner = THIS_MODULE, |
|
.magic = TTY_LDISC_MAGIC, |
|
.name = "n_hci", |
|
.open = hci_uart_tty_open, |
|
.close = hci_uart_tty_close, |
|
.read = hci_uart_tty_read, |
|
.write = hci_uart_tty_write, |
|
.ioctl = hci_uart_tty_ioctl, |
|
.compat_ioctl = hci_uart_tty_ioctl, |
|
.poll = hci_uart_tty_poll, |
|
.receive_buf = hci_uart_tty_receive, |
|
.write_wakeup = hci_uart_tty_wakeup, |
|
}; |
|
|
|
static int __init hci_uart_init(void) |
|
{ |
|
int err; |
|
|
|
BT_INFO("HCI UART driver ver %s", VERSION); |
|
|
|
/* Register the tty discipline */ |
|
err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
|
if (err) { |
|
BT_ERR("HCI line discipline registration failed. (%d)", err); |
|
return err; |
|
} |
|
|
|
#ifdef CONFIG_BT_HCIUART_H4 |
|
h4_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_BCSP |
|
bcsp_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_LL |
|
ll_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_ATH3K |
|
ath_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_3WIRE |
|
h5_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_INTEL |
|
intel_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_BCM |
|
bcm_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_QCA |
|
qca_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_AG6XX |
|
ag6xx_init(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_MRVL |
|
mrvl_init(); |
|
#endif |
|
|
|
return 0; |
|
} |
|
|
|
static void __exit hci_uart_exit(void) |
|
{ |
|
int err; |
|
|
|
#ifdef CONFIG_BT_HCIUART_H4 |
|
h4_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_BCSP |
|
bcsp_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_LL |
|
ll_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_ATH3K |
|
ath_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_3WIRE |
|
h5_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_INTEL |
|
intel_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_BCM |
|
bcm_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_QCA |
|
qca_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_AG6XX |
|
ag6xx_deinit(); |
|
#endif |
|
#ifdef CONFIG_BT_HCIUART_MRVL |
|
mrvl_deinit(); |
|
#endif |
|
|
|
/* Release tty registration of line discipline */ |
|
err = tty_unregister_ldisc(N_HCI); |
|
if (err) |
|
BT_ERR("Can't unregister HCI line discipline (%d)", err); |
|
} |
|
|
|
module_init(hci_uart_init); |
|
module_exit(hci_uart_exit); |
|
|
|
MODULE_AUTHOR("Marcel Holtmann <[email protected]>"); |
|
MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
|
MODULE_VERSION(VERSION); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS_LDISC(N_HCI);
|
|
|