^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Bluetooth HCI UART driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2000-2001 Qualcomm Incorporated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/firmware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/serdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <net/bluetooth/bluetooth.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <net/bluetooth/hci_core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "btintel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include "btbcm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include "hci_uart.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define VERSION "2.3"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int hci_uart_register_proto(const struct hci_uart_proto *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (p->id >= HCI_UART_MAX_PROTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (hup[p->id])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) hup[p->id] = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) BT_INFO("HCI UART protocol %s registered", p->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int hci_uart_unregister_proto(const struct hci_uart_proto *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (p->id >= HCI_UART_MAX_PROTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (!hup[p->id])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) hup[p->id] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static const struct hci_uart_proto *hci_uart_get_proto(unsigned int id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (id >= HCI_UART_MAX_PROTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return hup[id];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct hci_dev *hdev = hu->hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* Update HCI stat counters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) switch (pkt_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case HCI_COMMAND_PKT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) hdev->stat.cmd_tx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) case HCI_ACLDATA_PKT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) hdev->stat.acl_tx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) case HCI_SCODATA_PKT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) hdev->stat.sco_tx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct sk_buff *skb = hu->tx_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) percpu_down_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (test_bit(HCI_UART_PROTO_READY, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) skb = hu->proto->dequeue(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) percpu_up_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) hu->tx_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int hci_uart_tx_wakeup(struct hci_uart *hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* This may be called in an IRQ context, so we can't sleep. Therefore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * we try to acquire the lock only, and if that fails we assume the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * tty is being closed because that is the only time the write lock is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * acquired. If, however, at some point in the future the write lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * is also acquired in other situations, then this must be revisited.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (!percpu_down_read_trylock(&hu->proto_lock))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (!test_bit(HCI_UART_PROTO_READY, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) goto no_schedule;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) goto no_schedule;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) BT_DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) schedule_work(&hu->write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) no_schedule:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) percpu_up_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) EXPORT_SYMBOL_GPL(hci_uart_tx_wakeup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static void hci_uart_write_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct hci_uart *hu = container_of(work, struct hci_uart, write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct tty_struct *tty = hu->tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct hci_dev *hdev = hu->hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) clear_bit(HCI_UART_SENDING, &hu->tx_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* REVISIT: should we cope with bad skbs or ->write() returning
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * and error value ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) while ((skb = hci_uart_dequeue(hu))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) len = tty->ops->write(tty, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) hdev->stat.byte_tx += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) skb_pull(skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (skb->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) hu->tx_skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) hci_uart_tx_complete(hu, hci_skb_pkt_type(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) clear_bit(HCI_UART_SENDING, &hu->tx_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) goto restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) wake_up_bit(&hu->tx_state, HCI_UART_SENDING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) void hci_uart_init_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct hci_uart *hu = container_of(work, struct hci_uart, init_ready);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct hci_dev *hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) err = hci_register_dev(hu->hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) BT_ERR("Can't register HCI device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) clear_bit(HCI_UART_PROTO_READY, &hu->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) hu->proto->close(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) hdev = hu->hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) hu->hdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) hci_free_dev(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) set_bit(HCI_UART_REGISTERED, &hu->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) int hci_uart_init_ready(struct hci_uart *hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) schedule_work(&hu->init_ready);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) int hci_uart_wait_until_sent(struct hci_uart *hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return wait_on_bit_timeout(&hu->tx_state, HCI_UART_SENDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) TASK_INTERRUPTIBLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) msecs_to_jiffies(2000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /* ------- Interface to HCI layer ------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /* Reset device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static int hci_uart_flush(struct hci_dev *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct hci_uart *hu = hci_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct tty_struct *tty = hu->tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) BT_DBG("hdev %p tty %p", hdev, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (hu->tx_skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /* Flush any pending characters in the driver and discipline. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) tty_ldisc_flush(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) tty_driver_flush_buffer(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) percpu_down_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (test_bit(HCI_UART_PROTO_READY, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) hu->proto->flush(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) percpu_up_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* Initialize device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static int hci_uart_open(struct hci_dev *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) BT_DBG("%s %p", hdev->name, hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* Undo clearing this from hci_uart_close() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) hdev->flush = hci_uart_flush;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) /* Close device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static int hci_uart_close(struct hci_dev *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) BT_DBG("hdev %p", hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) hci_uart_flush(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) hdev->flush = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) /* Send frames from HCI layer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct hci_uart *hu = hci_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) percpu_down_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) percpu_up_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return -EUNATCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) hu->proto->enqueue(hu, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) percpu_up_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) hci_uart_tx_wakeup(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /* Check the underlying device or tty has flow control support */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) bool hci_uart_has_flow_control(struct hci_uart *hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) /* serdev nodes check if the needed operations are present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (hu->serdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (hu->tty->driver->ops->tiocmget && hu->tty->driver->ops->tiocmset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) /* Flow control or un-flow control the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) void hci_uart_set_flow_control(struct hci_uart *hu, bool enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct tty_struct *tty = hu->tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct ktermios ktermios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) unsigned int set = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) unsigned int clear = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (hu->serdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) serdev_device_set_flow_control(hu->serdev, !enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) serdev_device_set_rts(hu->serdev, !enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* Disable hardware flow control */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) ktermios = tty->termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) ktermios.c_cflag &= ~CRTSCTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) status = tty_set_termios(tty, &ktermios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) BT_DBG("Disabling hardware flow control: %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) status ? "failed" : "success");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /* Clear RTS to prevent the device from sending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) /* Most UARTs need OUT2 to enable interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) status = tty->driver->ops->tiocmget(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) BT_DBG("Current tiocm 0x%x", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) set &= ~(TIOCM_OUT2 | TIOCM_RTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) clear = ~set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) TIOCM_OUT2 | TIOCM_LOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) TIOCM_OUT2 | TIOCM_LOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) status = tty->driver->ops->tiocmset(tty, set, clear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) BT_DBG("Clearing RTS: %s", status ? "failed" : "success");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) /* Set RTS to allow the device to send again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) status = tty->driver->ops->tiocmget(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) BT_DBG("Current tiocm 0x%x", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) set |= (TIOCM_OUT2 | TIOCM_RTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) clear = ~set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) TIOCM_OUT2 | TIOCM_LOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) TIOCM_OUT2 | TIOCM_LOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) status = tty->driver->ops->tiocmset(tty, set, clear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) BT_DBG("Setting RTS: %s", status ? "failed" : "success");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) /* Re-enable hardware flow control */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) ktermios = tty->termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) ktermios.c_cflag |= CRTSCTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) status = tty_set_termios(tty, &ktermios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) BT_DBG("Enabling hardware flow control: %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) status ? "failed" : "success");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) unsigned int oper_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) hu->init_speed = init_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) hu->oper_speed = oper_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct tty_struct *tty = hu->tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) struct ktermios ktermios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) ktermios = tty->termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) ktermios.c_cflag &= ~CBAUD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) tty_termios_encode_baud_rate(&ktermios, speed, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) /* tty_set_termios() return not checked as it is always 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) tty_set_termios(tty, &ktermios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) tty->termios.c_ispeed, tty->termios.c_ospeed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) static int hci_uart_setup(struct hci_dev *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct hci_uart *hu = hci_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct hci_rp_read_local_version *ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) unsigned int speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /* Init speed if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (hu->init_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) speed = hu->init_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) else if (hu->proto->init_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) speed = hu->proto->init_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) speed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) hci_uart_set_baudrate(hu, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) /* Operational speed if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if (hu->oper_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) speed = hu->oper_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) else if (hu->proto->oper_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) speed = hu->proto->oper_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) speed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (hu->proto->set_baudrate && speed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) err = hu->proto->set_baudrate(hu, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) hci_uart_set_baudrate(hu, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (hu->proto->setup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return hu->proto->setup(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) HCI_INIT_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (IS_ERR(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) BT_ERR("%s: Reading local version information failed (%ld)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) hdev->name, PTR_ERR(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (skb->len != sizeof(*ver)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) BT_ERR("%s: Event length mismatch for version information",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) hdev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) ver = (struct hci_rp_read_local_version *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) switch (le16_to_cpu(ver->manufacturer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) #ifdef CONFIG_BT_HCIUART_INTEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) hdev->set_bdaddr = btintel_set_bdaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) btintel_check_bdaddr(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) #ifdef CONFIG_BT_HCIUART_BCM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) case 15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) hdev->set_bdaddr = btbcm_set_bdaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) btbcm_check_bdaddr(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) /* ------ LDISC part ------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) /* hci_uart_tty_open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * Called when line discipline changed to HCI_UART.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) * Arguments:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) * tty pointer to tty info structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) * Return Value:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) * 0 if success, otherwise error code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static int hci_uart_tty_open(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) struct hci_uart *hu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) BT_DBG("tty %p", tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /* Error if the tty has no write op instead of leaving an exploitable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) * hole
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (tty->ops->write == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) if (!hu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) BT_ERR("Can't allocate control structure");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) return -ENFILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) tty->disc_data = hu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) hu->tty = tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) tty->receive_room = 65536;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) /* disable alignment support by default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) hu->alignment = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) hu->padding = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) INIT_WORK(&hu->init_ready, hci_uart_init_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) INIT_WORK(&hu->write_work, hci_uart_write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) percpu_init_rwsem(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) /* Flush any pending characters in the driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) tty_driver_flush_buffer(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) /* hci_uart_tty_close()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * Called when the line discipline is changed to something
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * else, the tty is closed, or the tty detects a hangup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) static void hci_uart_tty_close(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) struct hci_uart *hu = tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) struct hci_dev *hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) BT_DBG("tty %p", tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) /* Detach from the tty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) tty->disc_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (!hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) hdev = hu->hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) hci_uart_close(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) percpu_down_write(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) clear_bit(HCI_UART_PROTO_READY, &hu->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) percpu_up_write(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) cancel_work_sync(&hu->init_ready);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) cancel_work_sync(&hu->write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (hdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (test_bit(HCI_UART_REGISTERED, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) hci_unregister_dev(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) hci_free_dev(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) hu->proto->close(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) clear_bit(HCI_UART_PROTO_SET, &hu->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) percpu_free_rwsem(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) kfree(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) /* hci_uart_tty_wakeup()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * Callback for transmit wakeup. Called when low level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * device driver can accept more send data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) * Arguments: tty pointer to associated tty instance data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) * Return Value: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) static void hci_uart_tty_wakeup(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct hci_uart *hu = tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) BT_DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (!hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (tty != hu->tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (test_bit(HCI_UART_PROTO_READY, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) hci_uart_tx_wakeup(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) /* hci_uart_tty_receive()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) * Called by tty low level driver when receive data is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * Arguments: tty pointer to tty isntance data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * data pointer to received data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * flags pointer to flags for data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * count count of received data in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) * Return Value: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) char *flags, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct hci_uart *hu = tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (!hu || tty != hu->tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) percpu_down_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) percpu_up_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /* It does not need a lock here as it is already protected by a mutex in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * tty caller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) hu->proto->recv(hu, data, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) percpu_up_read(&hu->proto_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) if (hu->hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) hu->hdev->stat.byte_rx += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) tty_unthrottle(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) static int hci_uart_register_dev(struct hci_uart *hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) struct hci_dev *hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) BT_DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) /* Initialize and register HCI device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) hdev = hci_alloc_dev();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (!hdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) BT_ERR("Can't allocate HCI device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) hu->hdev = hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) hdev->bus = HCI_UART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) hci_set_drvdata(hdev, hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) /* Only when vendor specific setup callback is provided, consider
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) * the manufacturer information valid. This avoids filling in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * value for Ericsson when nothing is specified.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (hu->proto->setup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) hdev->manufacturer = hu->proto->manufacturer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) hdev->open = hci_uart_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) hdev->close = hci_uart_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) hdev->flush = hci_uart_flush;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) hdev->send = hci_uart_send_frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) hdev->setup = hci_uart_setup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) SET_HCIDEV_DEV(hdev, hu->tty->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) hdev->dev_type = HCI_AMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) hdev->dev_type = HCI_PRIMARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) /* Only call open() for the protocol after hdev is fully initialized as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) * open() (or a timer/workqueue it starts) may attempt to reference it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) err = hu->proto->open(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) hu->hdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) hci_free_dev(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) if (hci_register_dev(hdev) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) BT_ERR("Can't register HCI device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) hu->proto->close(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) hu->hdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) hci_free_dev(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) set_bit(HCI_UART_REGISTERED, &hu->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) static int hci_uart_set_proto(struct hci_uart *hu, int id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) const struct hci_uart_proto *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) p = hci_uart_get_proto(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) return -EPROTONOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) hu->proto = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) err = hci_uart_register_dev(hu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) set_bit(HCI_UART_PROTO_READY, &hu->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) BIT(HCI_UART_RESET_ON_INIT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) BIT(HCI_UART_CREATE_AMP) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) BIT(HCI_UART_INIT_PENDING) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) BIT(HCI_UART_EXT_CONFIG) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) BIT(HCI_UART_VND_DETECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) if (flags & ~valid_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) hu->hdev_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) /* hci_uart_tty_ioctl()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) * Process IOCTL system call for the tty device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) * Arguments:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) * tty pointer to tty instance data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * file pointer to open file object for device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) * cmd IOCTL command code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) * arg argument for IOCTL call (cmd dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) * Return Value: Command dependent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) struct hci_uart *hu = tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) BT_DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) /* Verify the status of the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) if (!hu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) return -EBADF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) case HCIUARTSETPROTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) err = hci_uart_set_proto(hu, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) clear_bit(HCI_UART_PROTO_SET, &hu->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) err = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) case HCIUARTGETPROTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) err = hu->proto->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) err = -EUNATCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) case HCIUARTGETDEVICE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) if (test_bit(HCI_UART_REGISTERED, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) err = hu->hdev->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) err = -EUNATCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) case HCIUARTSETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) err = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) err = hci_uart_set_flags(hu, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) case HCIUARTGETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) err = hu->hdev_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) err = n_tty_ioctl_helper(tty, file, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) * We don't provide read/write/poll interface for user space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) unsigned char *buf, size_t nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) void **cookie, unsigned long offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) const unsigned char *data, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) static __poll_t hci_uart_tty_poll(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) struct file *filp, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) static struct tty_ldisc_ops hci_uart_ldisc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) .magic = TTY_LDISC_MAGIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) .name = "n_hci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) .open = hci_uart_tty_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) .close = hci_uart_tty_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) .read = hci_uart_tty_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) .write = hci_uart_tty_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) .ioctl = hci_uart_tty_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) .compat_ioctl = hci_uart_tty_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) .poll = hci_uart_tty_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) .receive_buf = hci_uart_tty_receive,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) .write_wakeup = hci_uart_tty_wakeup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) static int __init hci_uart_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) BT_INFO("HCI UART driver ver %s", VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) /* Register the tty discipline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) err = tty_register_ldisc(N_HCI, &hci_uart_ldisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) BT_ERR("HCI line discipline registration failed. (%d)", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) #ifdef CONFIG_BT_HCIUART_H4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) h4_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) #ifdef CONFIG_BT_HCIUART_BCSP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) bcsp_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) #ifdef CONFIG_BT_HCIUART_LL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) ll_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) #ifdef CONFIG_BT_HCIUART_ATH3K
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) ath_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) #ifdef CONFIG_BT_HCIUART_3WIRE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) h5_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) #ifdef CONFIG_BT_HCIUART_INTEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) intel_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) #ifdef CONFIG_BT_HCIUART_BCM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) bcm_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) #ifdef CONFIG_BT_HCIUART_QCA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) qca_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) #ifdef CONFIG_BT_HCIUART_AG6XX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) ag6xx_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) #ifdef CONFIG_BT_HCIUART_MRVL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) mrvl_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) static void __exit hci_uart_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) #ifdef CONFIG_BT_HCIUART_H4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) h4_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) #ifdef CONFIG_BT_HCIUART_BCSP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) bcsp_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) #ifdef CONFIG_BT_HCIUART_LL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) ll_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) #ifdef CONFIG_BT_HCIUART_ATH3K
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) ath_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) #ifdef CONFIG_BT_HCIUART_3WIRE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) h5_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) #ifdef CONFIG_BT_HCIUART_INTEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) intel_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) #ifdef CONFIG_BT_HCIUART_BCM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) bcm_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) #ifdef CONFIG_BT_HCIUART_QCA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) qca_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) #ifdef CONFIG_BT_HCIUART_AG6XX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) ag6xx_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) #ifdef CONFIG_BT_HCIUART_MRVL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) mrvl_deinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) /* Release tty registration of line discipline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) err = tty_unregister_ldisc(N_HCI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) BT_ERR("Can't unregister HCI line discipline (%d)", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) module_init(hci_uart_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) module_exit(hci_uart_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) MODULE_VERSION(VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) MODULE_ALIAS_LDISC(N_HCI);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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