// SPDX-License-Identifier: GPL-2.0-only /* * Texas Instruments' Bluetooth HCILL UART protocol * * HCILL (HCI Low Level) is a Texas Instruments' power management * protocol extension to H4. * * Copyright (C) 2007 Texas Instruments, Inc. * * Written by Ohad Ben-Cohen <[email protected]> * * Acknowledgements: * This file is based on hci_h4.c, which was written * by Maxim Krasnyansky and Marcel Holtmann. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/sched.h> #include <linux/types.h> #include <linux/fcntl.h> #include <linux/firmware.h> #include <linux/interrupt.h> #include <linux/ptrace.h> #include <linux/poll.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/signal.h> #include <linux/ioctl.h> #include <linux/of.h> #include <linux/serdev.h> #include <linux/skbuff.h> #include <linux/ti_wilink_st.h> #include <linux/clk.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> #include <linux/gpio/consumer.h> #include <linux/nvmem-consumer.h> #include "hci_uart.h" /* Vendor-specific HCI commands */ #define HCI_VS_WRITE_BD_ADDR … #define HCI_VS_UPDATE_UART_HCI_BAUDRATE … /* HCILL commands */ #define HCILL_GO_TO_SLEEP_IND … #define HCILL_GO_TO_SLEEP_ACK … #define HCILL_WAKE_UP_IND … #define HCILL_WAKE_UP_ACK … /* HCILL states */ enum hcill_states_e { … }; struct ll_device { … }; struct ll_struct { … }; /* * Builds and sends an HCILL command packet. * These are very simple packets with only 1 cmd byte */ static int send_hcill_cmd(u8 cmd, struct hci_uart *hu) { … } /* Initialize protocol */ static int ll_open(struct hci_uart *hu) { … } /* Flush protocol data */ static int ll_flush(struct hci_uart *hu) { … } /* Close protocol */ static int ll_close(struct hci_uart *hu) { … } /* * internal function, which does common work of the device wake up process: * 1. places all pending packets (waiting in tx_wait_q list) in txq list. * 2. changes internal state to HCILL_AWAKE. * Note: assumes that hcill_lock spinlock is taken, * shouldn't be called otherwise! */ static void __ll_do_awake(struct ll_struct *ll) { … } /* * Called upon a wake-up-indication from the device */ static void ll_device_want_to_wakeup(struct hci_uart *hu) { … } /* * Called upon a sleep-indication from the device */ static void ll_device_want_to_sleep(struct hci_uart *hu) { … } /* * Called upon wake-up-acknowledgement from the device */ static void ll_device_woke_up(struct hci_uart *hu) { … } /* Enqueue frame for transmittion (padding, crc, etc) */ /* may be called from two simultaneous tasklets */ static int ll_enqueue(struct hci_uart *hu, struct sk_buff *skb) { … } static int ll_recv_frame(struct hci_dev *hdev, struct sk_buff *skb) { … } #define LL_RECV_SLEEP_IND … #define LL_RECV_SLEEP_ACK … #define LL_RECV_WAKE_IND … #define LL_RECV_WAKE_ACK … static const struct h4_recv_pkt ll_recv_pkts[] = …; /* Recv data */ static int ll_recv(struct hci_uart *hu, const void *data, int count) { … } static struct sk_buff *ll_dequeue(struct hci_uart *hu) { … } #if IS_ENABLED(CONFIG_SERIAL_DEV_BUS) static int read_local_version(struct hci_dev *hdev) { … } static int send_command_from_firmware(struct ll_device *lldev, struct hci_command *cmd) { … } /* * download_firmware - * internal function which parses through the .bts firmware * script file intreprets SEND, DELAY actions only as of now */ static int download_firmware(struct ll_device *lldev) { … } static int ll_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) { … } static int ll_setup(struct hci_uart *hu) { … } static const struct hci_uart_proto llp; static int hci_ti_probe(struct serdev_device *serdev) { … } static void hci_ti_remove(struct serdev_device *serdev) { … } static const struct of_device_id hci_ti_of_match[] = …; MODULE_DEVICE_TABLE(of, hci_ti_of_match); static struct serdev_device_driver hci_ti_drv = …; #else #define ll_setup … #endif static const struct hci_uart_proto llp = …; int __init ll_init(void) { … } int __exit ll_deinit(void) { … }
Codebase Browser
linux