^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright (C) 2015, Marvell International Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This software file (the "File") is distributed by Marvell International
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Ltd. under the terms of the GNU General Public License Version 2, June 1991
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * (the "License"). You may use, redistribute and/or modify this File in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * accordance with the terms and conditions of the License, a copy of which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * is available on the worldwide web at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * this warranty disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /* Inspired (hugely) by HCI LDISC implementation in Bluetooth.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Copyright (C) 2000-2001 Qualcomm Incorporated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <net/nfc/nci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <net/nfc/nci_core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /* TX states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define NCI_UART_SENDING 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define NCI_UART_TX_WAKEUP 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static struct nci_uart *nci_uart_drivers[NCI_UART_DRIVER_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static inline struct sk_buff *nci_uart_dequeue(struct nci_uart *nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct sk_buff *skb = nu->tx_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) skb = skb_dequeue(&nu->tx_q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) nu->tx_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static inline int nci_uart_queue_empty(struct nci_uart *nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (nu->tx_skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return skb_queue_empty(&nu->tx_q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int nci_uart_tx_wakeup(struct nci_uart *nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (test_and_set_bit(NCI_UART_SENDING, &nu->tx_state)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) set_bit(NCI_UART_TX_WAKEUP, &nu->tx_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return 0;
^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) schedule_work(&nu->write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static void nci_uart_write_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct nci_uart *nu = container_of(work, struct nci_uart, write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct tty_struct *tty = nu->tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) clear_bit(NCI_UART_TX_WAKEUP, &nu->tx_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (nu->ops.tx_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) nu->ops.tx_start(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) while ((skb = nci_uart_dequeue(nu))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) len = tty->ops->write(tty, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) skb_pull(skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (skb->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) nu->tx_skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (test_bit(NCI_UART_TX_WAKEUP, &nu->tx_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) goto restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (nu->ops.tx_done && nci_uart_queue_empty(nu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) nu->ops.tx_done(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) clear_bit(NCI_UART_SENDING, &nu->tx_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int nci_uart_set_driver(struct tty_struct *tty, unsigned int driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct nci_uart *nu = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (driver >= NCI_UART_DRIVER_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (!nci_uart_drivers[driver])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) nu = kzalloc(sizeof(*nu), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) memcpy(nu, nci_uart_drivers[driver], sizeof(struct nci_uart));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) nu->tty = tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) tty->disc_data = nu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) skb_queue_head_init(&nu->tx_q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) INIT_WORK(&nu->write_work, nci_uart_write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) spin_lock_init(&nu->rx_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ret = nu->ops.open(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) tty->disc_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) kfree(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) } else if (!try_module_get(nu->owner)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) nu->ops.close(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) tty->disc_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) kfree(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /* ------ LDISC part ------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /* nci_uart_tty_open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * Called when line discipline changed to NCI_UART.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * Arguments:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * tty pointer to tty info structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * Return Value:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * 0 if success, otherwise error code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int nci_uart_tty_open(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* Error if the tty has no write op instead of leaving an exploitable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * hole
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (!tty->ops->write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) tty->disc_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) tty->receive_room = 65536;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Flush any pending characters in the driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) tty_driver_flush_buffer(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* nci_uart_tty_close()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * Called when the line discipline is changed to something
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * else, the tty is closed, or the tty detects a hangup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static void nci_uart_tty_close(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct nci_uart *nu = (void *)tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /* Detach from the tty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) tty->disc_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (!nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) kfree_skb(nu->tx_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) kfree_skb(nu->rx_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) skb_queue_purge(&nu->tx_q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) nu->ops.close(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) nu->tty = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) module_put(nu->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) cancel_work_sync(&nu->write_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) kfree(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /* nci_uart_tty_wakeup()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * Callback for transmit wakeup. Called when low level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * device driver can accept more send data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * Arguments: tty pointer to associated tty instance data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) * Return Value: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static void nci_uart_tty_wakeup(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct nci_uart *nu = (void *)tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (!nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (tty != nu->tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) nci_uart_tx_wakeup(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* nci_uart_tty_receive()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * Called by tty low level driver when receive data is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * Arguments: tty pointer to tty isntance data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * data pointer to received data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * flags pointer to flags for data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * count count of received data in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * Return Value: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static void nci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) char *flags, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct nci_uart *nu = (void *)tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (!nu || tty != nu->tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) spin_lock(&nu->rx_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) nu->ops.recv_buf(nu, (void *)data, flags, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) spin_unlock(&nu->rx_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) tty_unthrottle(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) /* nci_uart_tty_ioctl()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * Process IOCTL system call for the tty device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * Arguments:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * tty pointer to tty instance data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * file pointer to open file object for device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * cmd IOCTL command code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * arg argument for IOCTL call (cmd dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * Return Value: Command dependent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static int nci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct nci_uart *nu = (void *)tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) case NCIUARTSETDRIVER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (!nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return nci_uart_set_driver(tty, (unsigned int)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) err = n_tty_ioctl_helper(tty, file, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) /* We don't provide read/write/poll interface for user space. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static ssize_t nci_uart_tty_read(struct tty_struct *tty, struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) unsigned char *buf, size_t nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) void **cookie, unsigned long offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) static ssize_t nci_uart_tty_write(struct tty_struct *tty, struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) const unsigned char *data, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static __poll_t nci_uart_tty_poll(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct file *filp, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static int nci_uart_send(struct nci_uart *nu, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) /* Queue TX packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) skb_queue_tail(&nu->tx_q, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* Try to start TX (if possible) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) nci_uart_tx_wakeup(nu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /* -- Default recv_buf handler --
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * This handler supposes that NCI frames are sent over UART link without any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * framing. It reads NCI header, retrieve the packet size and once all packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * bytes are received it passes it to nci_uart driver for processing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) static int nci_uart_default_recv_buf(struct nci_uart *nu, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) char *flags, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) int chunk_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (!nu->ndev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) nfc_err(nu->tty->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) "receive data from tty but no NCI dev is attached yet, drop buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) /* Decode all incoming data in packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * and enqueue then for processing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) while (count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) /* If this is the first data of a packet, allocate a buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (!nu->rx_skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) nu->rx_packet_len = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) nu->rx_skb = nci_skb_alloc(nu->ndev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) NCI_MAX_PACKET_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (!nu->rx_skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /* Eat byte after byte till full packet header is received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (nu->rx_skb->len < NCI_CTRL_HDR_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) skb_put_u8(nu->rx_skb, *data++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) --count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) /* Header was received but packet len was not read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (nu->rx_packet_len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) nu->rx_packet_len = NCI_CTRL_HDR_SIZE +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) nci_plen(nu->rx_skb->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /* Compute how many bytes are missing and how many bytes can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * be consumed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) chunk_len = nu->rx_packet_len - nu->rx_skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (count < chunk_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) chunk_len = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) skb_put_data(nu->rx_skb, data, chunk_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) data += chunk_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) count -= chunk_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* Chcek if packet is fully received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (nu->rx_packet_len == nu->rx_skb->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) /* Pass RX packet to driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (nu->ops.recv(nu, nu->rx_skb) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) nfc_err(nu->tty->dev, "corrupted RX packet\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) /* Next packet will be a new one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) nu->rx_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) /* -- Default recv handler -- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static int nci_uart_default_recv(struct nci_uart *nu, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) return nci_recv_frame(nu->ndev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int nci_uart_register(struct nci_uart *nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (!nu || !nu->ops.open ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) !nu->ops.recv || !nu->ops.close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /* Set the send callback */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) nu->ops.send = nci_uart_send;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) /* Install default handlers if not overridden */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (!nu->ops.recv_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) nu->ops.recv_buf = nci_uart_default_recv_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (!nu->ops.recv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) nu->ops.recv = nci_uart_default_recv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /* Add this driver in the driver list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (nci_uart_drivers[nu->driver]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) pr_err("driver %d is already registered\n", nu->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) nci_uart_drivers[nu->driver] = nu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) pr_info("NCI uart driver '%s [%d]' registered\n", nu->name, nu->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) EXPORT_SYMBOL_GPL(nci_uart_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) void nci_uart_unregister(struct nci_uart *nu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) pr_info("NCI uart driver '%s [%d]' unregistered\n", nu->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) nu->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /* Remove this driver from the driver list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) nci_uart_drivers[nu->driver] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) EXPORT_SYMBOL_GPL(nci_uart_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct ktermios new_termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (!nu->tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) down_read(&nu->tty->termios_rwsem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) new_termios = nu->tty->termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) up_read(&nu->tty->termios_rwsem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) tty_termios_encode_baud_rate(&new_termios, baudrate, baudrate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (flow_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) new_termios.c_cflag |= CRTSCTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) new_termios.c_cflag &= ~CRTSCTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) tty_set_termios(nu->tty, &new_termios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) EXPORT_SYMBOL_GPL(nci_uart_set_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) static struct tty_ldisc_ops nci_uart_ldisc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) .magic = TTY_LDISC_MAGIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) .name = "n_nci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) .open = nci_uart_tty_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) .close = nci_uart_tty_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) .read = nci_uart_tty_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) .write = nci_uart_tty_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) .poll = nci_uart_tty_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) .receive_buf = nci_uart_tty_receive,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) .write_wakeup = nci_uart_tty_wakeup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) .ioctl = nci_uart_tty_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) .compat_ioctl = nci_uart_tty_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) static int __init nci_uart_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) memset(nci_uart_drivers, 0, sizeof(nci_uart_drivers));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return tty_register_ldisc(N_NCI, &nci_uart_ldisc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static void __exit nci_uart_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) tty_unregister_ldisc(N_NCI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) module_init(nci_uart_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) module_exit(nci_uart_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) MODULE_AUTHOR("Marvell International Ltd.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) MODULE_DESCRIPTION("NFC NCI UART driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) MODULE_ALIAS_LDISC(N_NCI);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags