2007-10-20 11:42:36 +00:00
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/*
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* Texas Instruments' Bluetooth HCILL UART protocol
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*
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* HCILL (HCI Low Level) is a Texas Instruments' power management
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* protocol extension to H4.
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*
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* Copyright (C) 2007 Texas Instruments, Inc.
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*
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* Written by Ohad Ben-Cohen <ohad@bencohen.org>
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*
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* Acknowledgements:
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* This file is based on hci_h4.c, which was written
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* by Maxim Krasnyansky and Marcel Holtmann.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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2017-04-13 15:03:52 +00:00
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#include <linux/firmware.h>
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2007-10-20 11:42:36 +00:00
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#include <linux/interrupt.h>
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#include <linux/ptrace.h>
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#include <linux/poll.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/signal.h>
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#include <linux/ioctl.h>
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2017-04-13 15:03:52 +00:00
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#include <linux/of.h>
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#include <linux/serdev.h>
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2007-10-20 11:42:36 +00:00
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#include <linux/skbuff.h>
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2017-04-13 15:03:52 +00:00
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#include <linux/ti_wilink_st.h>
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2007-10-20 11:42:36 +00:00
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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2017-04-13 15:03:52 +00:00
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#include <linux/gpio/consumer.h>
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2007-10-20 11:42:36 +00:00
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#include "hci_uart.h"
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/* HCILL commands */
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#define HCILL_GO_TO_SLEEP_IND 0x30
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#define HCILL_GO_TO_SLEEP_ACK 0x31
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#define HCILL_WAKE_UP_IND 0x32
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#define HCILL_WAKE_UP_ACK 0x33
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/* HCILL receiver States */
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#define HCILL_W4_PACKET_TYPE 0
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#define HCILL_W4_EVENT_HDR 1
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#define HCILL_W4_ACL_HDR 2
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#define HCILL_W4_SCO_HDR 3
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#define HCILL_W4_DATA 4
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/* HCILL states */
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enum hcill_states_e {
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HCILL_ASLEEP,
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HCILL_ASLEEP_TO_AWAKE,
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HCILL_AWAKE,
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HCILL_AWAKE_TO_ASLEEP
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};
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struct hcill_cmd {
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u8 cmd;
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2010-07-19 16:54:05 +00:00
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} __packed;
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2007-10-20 11:42:36 +00:00
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2017-04-13 15:03:52 +00:00
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struct ll_device {
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struct hci_uart hu;
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struct serdev_device *serdev;
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struct gpio_desc *enable_gpio;
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};
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2007-10-20 11:42:36 +00:00
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struct ll_struct {
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unsigned long rx_state;
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unsigned long rx_count;
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struct sk_buff *rx_skb;
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struct sk_buff_head txq;
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spinlock_t hcill_lock; /* HCILL state lock */
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unsigned long hcill_state; /* HCILL power state */
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struct sk_buff_head tx_wait_q; /* HCILL wait queue */
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};
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/*
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* Builds and sends an HCILL command packet.
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* These are very simple packets with only 1 cmd byte
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*/
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static int send_hcill_cmd(u8 cmd, struct hci_uart *hu)
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{
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int err = 0;
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struct sk_buff *skb = NULL;
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struct ll_struct *ll = hu->priv;
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struct hcill_cmd *hcill_packet;
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BT_DBG("hu %p cmd 0x%x", hu, cmd);
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/* allocate packet */
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skb = bt_skb_alloc(1, GFP_ATOMIC);
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if (!skb) {
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BT_ERR("cannot allocate memory for HCILL packet");
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err = -ENOMEM;
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goto out;
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}
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/* prepare packet */
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hcill_packet = (struct hcill_cmd *) skb_put(skb, 1);
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hcill_packet->cmd = cmd;
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/* send packet */
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skb_queue_tail(&ll->txq, skb);
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out:
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return err;
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}
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/* Initialize protocol */
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static int ll_open(struct hci_uart *hu)
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{
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struct ll_struct *ll;
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BT_DBG("hu %p", hu);
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2012-01-07 14:19:37 +00:00
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ll = kzalloc(sizeof(*ll), GFP_KERNEL);
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2007-10-20 11:42:36 +00:00
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if (!ll)
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return -ENOMEM;
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skb_queue_head_init(&ll->txq);
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skb_queue_head_init(&ll->tx_wait_q);
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spin_lock_init(&ll->hcill_lock);
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ll->hcill_state = HCILL_AWAKE;
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hu->priv = ll;
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2017-04-13 15:03:52 +00:00
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if (hu->serdev)
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serdev_device_open(hu->serdev);
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2007-10-20 11:42:36 +00:00
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return 0;
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}
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/* Flush protocol data */
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static int ll_flush(struct hci_uart *hu)
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{
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struct ll_struct *ll = hu->priv;
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BT_DBG("hu %p", hu);
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skb_queue_purge(&ll->tx_wait_q);
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skb_queue_purge(&ll->txq);
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return 0;
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}
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/* Close protocol */
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static int ll_close(struct hci_uart *hu)
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{
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struct ll_struct *ll = hu->priv;
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BT_DBG("hu %p", hu);
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skb_queue_purge(&ll->tx_wait_q);
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skb_queue_purge(&ll->txq);
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2009-02-25 10:09:33 +00:00
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kfree_skb(ll->rx_skb);
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2007-10-20 11:42:36 +00:00
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2017-04-13 15:03:52 +00:00
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if (hu->serdev) {
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struct ll_device *lldev = serdev_device_get_drvdata(hu->serdev);
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gpiod_set_value_cansleep(lldev->enable_gpio, 0);
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serdev_device_close(hu->serdev);
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}
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2007-10-20 11:42:36 +00:00
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hu->priv = NULL;
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kfree(ll);
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return 0;
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}
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/*
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* internal function, which does common work of the device wake up process:
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* 1. places all pending packets (waiting in tx_wait_q list) in txq list.
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* 2. changes internal state to HCILL_AWAKE.
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* Note: assumes that hcill_lock spinlock is taken,
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* shouldn't be called otherwise!
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*/
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static void __ll_do_awake(struct ll_struct *ll)
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{
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struct sk_buff *skb = NULL;
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while ((skb = skb_dequeue(&ll->tx_wait_q)))
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skb_queue_tail(&ll->txq, skb);
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ll->hcill_state = HCILL_AWAKE;
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}
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/*
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* Called upon a wake-up-indication from the device
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*/
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static void ll_device_want_to_wakeup(struct hci_uart *hu)
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{
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unsigned long flags;
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struct ll_struct *ll = hu->priv;
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BT_DBG("hu %p", hu);
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/* lock hcill state */
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spin_lock_irqsave(&ll->hcill_lock, flags);
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switch (ll->hcill_state) {
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2008-01-11 06:24:43 +00:00
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case HCILL_ASLEEP_TO_AWAKE:
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/*
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* This state means that both the host and the BRF chip
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* have simultaneously sent a wake-up-indication packet.
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2011-03-31 01:57:33 +00:00
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* Traditionally, in this case, receiving a wake-up-indication
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2008-01-11 06:24:43 +00:00
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* was enough and an additional wake-up-ack wasn't needed.
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* This has changed with the BRF6350, which does require an
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* explicit wake-up-ack. Other BRF versions, which do not
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* require an explicit ack here, do accept it, thus it is
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* perfectly safe to always send one.
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*/
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BT_DBG("dual wake-up-indication");
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/* deliberate fall-through - do not add break */
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2007-10-20 11:42:36 +00:00
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case HCILL_ASLEEP:
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/* acknowledge device wake up */
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if (send_hcill_cmd(HCILL_WAKE_UP_ACK, hu) < 0) {
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BT_ERR("cannot acknowledge device wake up");
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goto out;
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}
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break;
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default:
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2008-01-11 06:24:43 +00:00
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/* any other state is illegal */
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2007-10-20 11:42:36 +00:00
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BT_ERR("received HCILL_WAKE_UP_IND in state %ld", ll->hcill_state);
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break;
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}
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/* send pending packets and change state to HCILL_AWAKE */
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__ll_do_awake(ll);
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out:
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spin_unlock_irqrestore(&ll->hcill_lock, flags);
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/* actually send the packets */
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hci_uart_tx_wakeup(hu);
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}
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/*
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* Called upon a sleep-indication from the device
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*/
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static void ll_device_want_to_sleep(struct hci_uart *hu)
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{
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unsigned long flags;
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struct ll_struct *ll = hu->priv;
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BT_DBG("hu %p", hu);
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/* lock hcill state */
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spin_lock_irqsave(&ll->hcill_lock, flags);
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/* sanity check */
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if (ll->hcill_state != HCILL_AWAKE)
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BT_ERR("ERR: HCILL_GO_TO_SLEEP_IND in state %ld", ll->hcill_state);
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/* acknowledge device sleep */
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if (send_hcill_cmd(HCILL_GO_TO_SLEEP_ACK, hu) < 0) {
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BT_ERR("cannot acknowledge device sleep");
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goto out;
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}
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/* update state */
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ll->hcill_state = HCILL_ASLEEP;
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out:
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spin_unlock_irqrestore(&ll->hcill_lock, flags);
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/* actually send the sleep ack packet */
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hci_uart_tx_wakeup(hu);
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}
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/*
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* Called upon wake-up-acknowledgement from the device
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*/
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static void ll_device_woke_up(struct hci_uart *hu)
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{
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unsigned long flags;
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struct ll_struct *ll = hu->priv;
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BT_DBG("hu %p", hu);
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/* lock hcill state */
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spin_lock_irqsave(&ll->hcill_lock, flags);
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/* sanity check */
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if (ll->hcill_state != HCILL_ASLEEP_TO_AWAKE)
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BT_ERR("received HCILL_WAKE_UP_ACK in state %ld", ll->hcill_state);
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/* send pending packets and change state to HCILL_AWAKE */
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__ll_do_awake(ll);
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spin_unlock_irqrestore(&ll->hcill_lock, flags);
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/* actually send the packets */
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hci_uart_tx_wakeup(hu);
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}
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/* Enqueue frame for transmittion (padding, crc, etc) */
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/* may be called from two simultaneous tasklets */
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static int ll_enqueue(struct hci_uart *hu, struct sk_buff *skb)
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{
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unsigned long flags = 0;
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struct ll_struct *ll = hu->priv;
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BT_DBG("hu %p skb %p", hu, skb);
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/* Prepend skb with frame type */
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2015-11-05 06:33:56 +00:00
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memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
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2007-10-20 11:42:36 +00:00
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/* lock hcill state */
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spin_lock_irqsave(&ll->hcill_lock, flags);
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/* act according to current state */
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switch (ll->hcill_state) {
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case HCILL_AWAKE:
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BT_DBG("device awake, sending normally");
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skb_queue_tail(&ll->txq, skb);
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break;
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case HCILL_ASLEEP:
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BT_DBG("device asleep, waking up and queueing packet");
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/* save packet for later */
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skb_queue_tail(&ll->tx_wait_q, skb);
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/* awake device */
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if (send_hcill_cmd(HCILL_WAKE_UP_IND, hu) < 0) {
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BT_ERR("cannot wake up device");
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break;
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}
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ll->hcill_state = HCILL_ASLEEP_TO_AWAKE;
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break;
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case HCILL_ASLEEP_TO_AWAKE:
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BT_DBG("device waking up, queueing packet");
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/* transient state; just keep packet for later */
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skb_queue_tail(&ll->tx_wait_q, skb);
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break;
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default:
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BT_ERR("illegal hcill state: %ld (losing packet)", ll->hcill_state);
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kfree_skb(skb);
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break;
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}
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|
|
|
|
|
spin_unlock_irqrestore(&ll->hcill_lock, flags);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-10-10 23:52:43 +00:00
|
|
|
static inline int ll_check_data_len(struct hci_dev *hdev, struct ll_struct *ll, int len)
|
2007-10-20 11:42:36 +00:00
|
|
|
{
|
2012-05-23 07:04:19 +00:00
|
|
|
int room = skb_tailroom(ll->rx_skb);
|
2007-10-20 11:42:36 +00:00
|
|
|
|
|
|
|
BT_DBG("len %d room %d", len, room);
|
|
|
|
|
|
|
|
if (!len) {
|
2013-10-10 23:52:43 +00:00
|
|
|
hci_recv_frame(hdev, ll->rx_skb);
|
2007-10-20 11:42:36 +00:00
|
|
|
} else if (len > room) {
|
|
|
|
BT_ERR("Data length is too large");
|
|
|
|
kfree_skb(ll->rx_skb);
|
|
|
|
} else {
|
|
|
|
ll->rx_state = HCILL_W4_DATA;
|
|
|
|
ll->rx_count = len;
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
ll->rx_state = HCILL_W4_PACKET_TYPE;
|
|
|
|
ll->rx_skb = NULL;
|
|
|
|
ll->rx_count = 0;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Recv data */
|
2015-04-05 03:59:41 +00:00
|
|
|
static int ll_recv(struct hci_uart *hu, const void *data, int count)
|
2007-10-20 11:42:36 +00:00
|
|
|
{
|
|
|
|
struct ll_struct *ll = hu->priv;
|
2015-04-05 03:59:41 +00:00
|
|
|
const char *ptr;
|
2007-10-20 11:42:36 +00:00
|
|
|
struct hci_event_hdr *eh;
|
|
|
|
struct hci_acl_hdr *ah;
|
|
|
|
struct hci_sco_hdr *sh;
|
2012-05-23 07:04:19 +00:00
|
|
|
int len, type, dlen;
|
2007-10-20 11:42:36 +00:00
|
|
|
|
|
|
|
BT_DBG("hu %p count %d rx_state %ld rx_count %ld", hu, count, ll->rx_state, ll->rx_count);
|
|
|
|
|
|
|
|
ptr = data;
|
|
|
|
while (count) {
|
|
|
|
if (ll->rx_count) {
|
|
|
|
len = min_t(unsigned int, ll->rx_count, count);
|
|
|
|
memcpy(skb_put(ll->rx_skb, len), ptr, len);
|
|
|
|
ll->rx_count -= len; count -= len; ptr += len;
|
|
|
|
|
|
|
|
if (ll->rx_count)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
switch (ll->rx_state) {
|
|
|
|
case HCILL_W4_DATA:
|
|
|
|
BT_DBG("Complete data");
|
2013-10-10 23:52:43 +00:00
|
|
|
hci_recv_frame(hu->hdev, ll->rx_skb);
|
2007-10-20 11:42:36 +00:00
|
|
|
|
|
|
|
ll->rx_state = HCILL_W4_PACKET_TYPE;
|
|
|
|
ll->rx_skb = NULL;
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case HCILL_W4_EVENT_HDR:
|
2010-05-01 19:15:34 +00:00
|
|
|
eh = hci_event_hdr(ll->rx_skb);
|
2007-10-20 11:42:36 +00:00
|
|
|
|
|
|
|
BT_DBG("Event header: evt 0x%2.2x plen %d", eh->evt, eh->plen);
|
|
|
|
|
2013-10-10 23:52:43 +00:00
|
|
|
ll_check_data_len(hu->hdev, ll, eh->plen);
|
2007-10-20 11:42:36 +00:00
|
|
|
continue;
|
|
|
|
|
|
|
|
case HCILL_W4_ACL_HDR:
|
2010-05-01 19:15:34 +00:00
|
|
|
ah = hci_acl_hdr(ll->rx_skb);
|
2007-10-20 11:42:36 +00:00
|
|
|
dlen = __le16_to_cpu(ah->dlen);
|
|
|
|
|
|
|
|
BT_DBG("ACL header: dlen %d", dlen);
|
|
|
|
|
2013-10-10 23:52:43 +00:00
|
|
|
ll_check_data_len(hu->hdev, ll, dlen);
|
2007-10-20 11:42:36 +00:00
|
|
|
continue;
|
|
|
|
|
|
|
|
case HCILL_W4_SCO_HDR:
|
2010-05-01 19:15:34 +00:00
|
|
|
sh = hci_sco_hdr(ll->rx_skb);
|
2007-10-20 11:42:36 +00:00
|
|
|
|
|
|
|
BT_DBG("SCO header: dlen %d", sh->dlen);
|
|
|
|
|
2013-10-10 23:52:43 +00:00
|
|
|
ll_check_data_len(hu->hdev, ll, sh->dlen);
|
2007-10-20 11:42:36 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* HCILL_W4_PACKET_TYPE */
|
|
|
|
switch (*ptr) {
|
|
|
|
case HCI_EVENT_PKT:
|
|
|
|
BT_DBG("Event packet");
|
|
|
|
ll->rx_state = HCILL_W4_EVENT_HDR;
|
|
|
|
ll->rx_count = HCI_EVENT_HDR_SIZE;
|
|
|
|
type = HCI_EVENT_PKT;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case HCI_ACLDATA_PKT:
|
|
|
|
BT_DBG("ACL packet");
|
|
|
|
ll->rx_state = HCILL_W4_ACL_HDR;
|
|
|
|
ll->rx_count = HCI_ACL_HDR_SIZE;
|
|
|
|
type = HCI_ACLDATA_PKT;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case HCI_SCODATA_PKT:
|
|
|
|
BT_DBG("SCO packet");
|
|
|
|
ll->rx_state = HCILL_W4_SCO_HDR;
|
|
|
|
ll->rx_count = HCI_SCO_HDR_SIZE;
|
|
|
|
type = HCI_SCODATA_PKT;
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* HCILL signals */
|
|
|
|
case HCILL_GO_TO_SLEEP_IND:
|
|
|
|
BT_DBG("HCILL_GO_TO_SLEEP_IND packet");
|
|
|
|
ll_device_want_to_sleep(hu);
|
|
|
|
ptr++; count--;
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case HCILL_GO_TO_SLEEP_ACK:
|
|
|
|
/* shouldn't happen */
|
|
|
|
BT_ERR("received HCILL_GO_TO_SLEEP_ACK (in state %ld)", ll->hcill_state);
|
|
|
|
ptr++; count--;
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case HCILL_WAKE_UP_IND:
|
|
|
|
BT_DBG("HCILL_WAKE_UP_IND packet");
|
|
|
|
ll_device_want_to_wakeup(hu);
|
|
|
|
ptr++; count--;
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case HCILL_WAKE_UP_ACK:
|
|
|
|
BT_DBG("HCILL_WAKE_UP_ACK packet");
|
|
|
|
ll_device_woke_up(hu);
|
|
|
|
ptr++; count--;
|
|
|
|
continue;
|
|
|
|
|
|
|
|
default:
|
|
|
|
BT_ERR("Unknown HCI packet type %2.2x", (__u8)*ptr);
|
|
|
|
hu->hdev->stat.err_rx++;
|
|
|
|
ptr++; count--;
|
|
|
|
continue;
|
2012-09-07 15:24:42 +00:00
|
|
|
}
|
2007-10-20 11:42:36 +00:00
|
|
|
|
|
|
|
ptr++; count--;
|
|
|
|
|
|
|
|
/* Allocate packet */
|
|
|
|
ll->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
|
|
|
|
if (!ll->rx_skb) {
|
|
|
|
BT_ERR("Can't allocate mem for new packet");
|
|
|
|
ll->rx_state = HCILL_W4_PACKET_TYPE;
|
|
|
|
ll->rx_count = 0;
|
2010-05-01 19:15:34 +00:00
|
|
|
return -ENOMEM;
|
2007-10-20 11:42:36 +00:00
|
|
|
}
|
|
|
|
|
2015-11-05 06:33:56 +00:00
|
|
|
hci_skb_pkt_type(ll->rx_skb) = type;
|
2007-10-20 11:42:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *ll_dequeue(struct hci_uart *hu)
|
|
|
|
{
|
|
|
|
struct ll_struct *ll = hu->priv;
|
|
|
|
return skb_dequeue(&ll->txq);
|
|
|
|
}
|
|
|
|
|
2017-04-13 15:03:52 +00:00
|
|
|
#if IS_ENABLED(CONFIG_SERIAL_DEV_BUS)
|
|
|
|
static int read_local_version(struct hci_dev *hdev)
|
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
unsigned short version = 0;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct hci_rp_read_local_version *ver;
|
|
|
|
|
|
|
|
skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, HCI_INIT_TIMEOUT);
|
|
|
|
if (IS_ERR(skb)) {
|
|
|
|
bt_dev_err(hdev, "Reading TI version information failed (%ld)",
|
|
|
|
PTR_ERR(skb));
|
|
|
|
err = PTR_ERR(skb);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (skb->len != sizeof(*ver)) {
|
|
|
|
err = -EILSEQ;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
ver = (struct hci_rp_read_local_version *)skb->data;
|
|
|
|
if (le16_to_cpu(ver->manufacturer) != 13) {
|
|
|
|
err = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
version = le16_to_cpu(ver->lmp_subver);
|
|
|
|
|
|
|
|
out:
|
|
|
|
if (err) bt_dev_err(hdev, "Failed to read TI version info: %d", err);
|
|
|
|
kfree_skb(skb);
|
|
|
|
return err ? err : version;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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)
|
|
|
|
{
|
|
|
|
unsigned short chip, min_ver, maj_ver;
|
|
|
|
int version, err, len;
|
|
|
|
unsigned char *ptr, *action_ptr;
|
|
|
|
unsigned char bts_scr_name[40]; /* 40 char long bts scr name? */
|
|
|
|
const struct firmware *fw;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct hci_command *cmd;
|
|
|
|
|
|
|
|
version = read_local_version(lldev->hu.hdev);
|
|
|
|
if (version < 0)
|
|
|
|
return version;
|
|
|
|
|
|
|
|
chip = (version & 0x7C00) >> 10;
|
|
|
|
min_ver = (version & 0x007F);
|
|
|
|
maj_ver = (version & 0x0380) >> 7;
|
|
|
|
if (version & 0x8000)
|
|
|
|
maj_ver |= 0x0008;
|
|
|
|
|
|
|
|
snprintf(bts_scr_name, sizeof(bts_scr_name),
|
|
|
|
"ti-connectivity/TIInit_%d.%d.%d.bts",
|
|
|
|
chip, maj_ver, min_ver);
|
|
|
|
|
|
|
|
err = request_firmware(&fw, bts_scr_name, &lldev->serdev->dev);
|
|
|
|
if (err || !fw->data || !fw->size) {
|
|
|
|
bt_dev_err(lldev->hu.hdev, "request_firmware failed(errno %d) for %s",
|
|
|
|
err, bts_scr_name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
ptr = (void *)fw->data;
|
|
|
|
len = fw->size;
|
|
|
|
/* bts_header to remove out magic number and
|
|
|
|
* version
|
|
|
|
*/
|
|
|
|
ptr += sizeof(struct bts_header);
|
|
|
|
len -= sizeof(struct bts_header);
|
|
|
|
|
|
|
|
while (len > 0 && ptr) {
|
|
|
|
bt_dev_dbg(lldev->hu.hdev, " action size %d, type %d ",
|
|
|
|
((struct bts_action *)ptr)->size,
|
|
|
|
((struct bts_action *)ptr)->type);
|
|
|
|
|
|
|
|
action_ptr = &(((struct bts_action *)ptr)->data[0]);
|
|
|
|
|
|
|
|
switch (((struct bts_action *)ptr)->type) {
|
|
|
|
case ACTION_SEND_COMMAND: /* action send */
|
|
|
|
bt_dev_dbg(lldev->hu.hdev, "S");
|
|
|
|
cmd = (struct hci_command *)action_ptr;
|
|
|
|
if (cmd->opcode == 0xff36) {
|
|
|
|
/* ignore remote change
|
|
|
|
* baud rate HCI VS command */
|
|
|
|
bt_dev_warn(lldev->hu.hdev, "change remote baud rate command in firmware");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (cmd->prefix != 1)
|
|
|
|
bt_dev_dbg(lldev->hu.hdev, "command type %d\n", cmd->prefix);
|
|
|
|
|
|
|
|
skb = __hci_cmd_sync(lldev->hu.hdev, cmd->opcode, cmd->plen, &cmd->speed, HCI_INIT_TIMEOUT);
|
|
|
|
if (IS_ERR(skb)) {
|
|
|
|
bt_dev_err(lldev->hu.hdev, "send command failed\n");
|
|
|
|
goto out_rel_fw;
|
|
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
|
|
break;
|
|
|
|
case ACTION_WAIT_EVENT: /* wait */
|
|
|
|
/* no need to wait as command was synchronous */
|
|
|
|
bt_dev_dbg(lldev->hu.hdev, "W");
|
|
|
|
break;
|
|
|
|
case ACTION_DELAY: /* sleep */
|
|
|
|
bt_dev_info(lldev->hu.hdev, "sleep command in scr");
|
|
|
|
mdelay(((struct bts_action_delay *)action_ptr)->msec);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
len -= (sizeof(struct bts_action) +
|
|
|
|
((struct bts_action *)ptr)->size);
|
|
|
|
ptr += sizeof(struct bts_action) +
|
|
|
|
((struct bts_action *)ptr)->size;
|
|
|
|
}
|
|
|
|
|
|
|
|
out_rel_fw:
|
|
|
|
/* fw download complete */
|
|
|
|
release_firmware(fw);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ll_setup(struct hci_uart *hu)
|
|
|
|
{
|
|
|
|
int err, retry = 3;
|
|
|
|
struct ll_device *lldev;
|
|
|
|
struct serdev_device *serdev = hu->serdev;
|
|
|
|
u32 speed;
|
|
|
|
|
|
|
|
if (!serdev)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
lldev = serdev_device_get_drvdata(serdev);
|
|
|
|
|
|
|
|
serdev_device_set_flow_control(serdev, true);
|
|
|
|
|
|
|
|
do {
|
|
|
|
/* Configure BT_EN to HIGH state */
|
|
|
|
gpiod_set_value_cansleep(lldev->enable_gpio, 0);
|
|
|
|
msleep(5);
|
|
|
|
gpiod_set_value_cansleep(lldev->enable_gpio, 1);
|
|
|
|
msleep(100);
|
|
|
|
|
|
|
|
err = download_firmware(lldev);
|
|
|
|
if (!err)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* Toggle BT_EN and retry */
|
|
|
|
bt_dev_err(hu->hdev, "download firmware failed, retrying...");
|
|
|
|
} while (retry--);
|
|
|
|
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
/* Operational speed if any */
|
|
|
|
if (hu->oper_speed)
|
|
|
|
speed = hu->oper_speed;
|
|
|
|
else if (hu->proto->oper_speed)
|
|
|
|
speed = hu->proto->oper_speed;
|
|
|
|
else
|
|
|
|
speed = 0;
|
|
|
|
|
|
|
|
if (speed) {
|
|
|
|
struct sk_buff *skb = __hci_cmd_sync(hu->hdev, 0xff36, sizeof(speed), &speed, HCI_INIT_TIMEOUT);
|
|
|
|
if (!IS_ERR(skb)) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
serdev_device_set_baudrate(serdev, speed);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct hci_uart_proto llp;
|
|
|
|
|
|
|
|
static int hci_ti_probe(struct serdev_device *serdev)
|
|
|
|
{
|
|
|
|
struct hci_uart *hu;
|
|
|
|
struct ll_device *lldev;
|
|
|
|
u32 max_speed = 3000000;
|
|
|
|
|
|
|
|
lldev = devm_kzalloc(&serdev->dev, sizeof(struct ll_device), GFP_KERNEL);
|
|
|
|
if (!lldev)
|
|
|
|
return -ENOMEM;
|
|
|
|
hu = &lldev->hu;
|
|
|
|
|
|
|
|
serdev_device_set_drvdata(serdev, lldev);
|
|
|
|
lldev->serdev = hu->serdev = serdev;
|
|
|
|
|
|
|
|
lldev->enable_gpio = devm_gpiod_get_optional(&serdev->dev, "enable", GPIOD_OUT_LOW);
|
|
|
|
if (IS_ERR(lldev->enable_gpio))
|
|
|
|
return PTR_ERR(lldev->enable_gpio);
|
|
|
|
|
|
|
|
of_property_read_u32(serdev->dev.of_node, "max-speed", &max_speed);
|
|
|
|
hci_uart_set_speeds(hu, 115200, max_speed);
|
|
|
|
|
|
|
|
return hci_uart_register_device(hu, &llp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void hci_ti_remove(struct serdev_device *serdev)
|
|
|
|
{
|
|
|
|
struct ll_device *lldev = serdev_device_get_drvdata(serdev);
|
|
|
|
struct hci_uart *hu = &lldev->hu;
|
|
|
|
struct hci_dev *hdev = hu->hdev;
|
|
|
|
|
|
|
|
cancel_work_sync(&hu->write_work);
|
|
|
|
|
|
|
|
hci_unregister_dev(hdev);
|
|
|
|
hci_free_dev(hdev);
|
|
|
|
hu->proto->close(hu);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct of_device_id hci_ti_of_match[] = {
|
|
|
|
{ .compatible = "ti,wl1831-st" },
|
|
|
|
{ .compatible = "ti,wl1835-st" },
|
|
|
|
{ .compatible = "ti,wl1837-st" },
|
|
|
|
{},
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, hci_ti_of_match);
|
|
|
|
|
|
|
|
static struct serdev_device_driver hci_ti_drv = {
|
|
|
|
.driver = {
|
|
|
|
.name = "hci-ti",
|
|
|
|
.of_match_table = of_match_ptr(hci_ti_of_match),
|
|
|
|
},
|
|
|
|
.probe = hci_ti_probe,
|
|
|
|
.remove = hci_ti_remove,
|
|
|
|
};
|
|
|
|
#else
|
|
|
|
#define ll_setup NULL
|
|
|
|
#endif
|
|
|
|
|
2015-04-05 05:11:43 +00:00
|
|
|
static const struct hci_uart_proto llp = {
|
2007-10-20 11:42:36 +00:00
|
|
|
.id = HCI_UART_LL,
|
2015-04-05 05:27:34 +00:00
|
|
|
.name = "LL",
|
2017-04-13 15:03:52 +00:00
|
|
|
.setup = ll_setup,
|
2007-10-20 11:42:36 +00:00
|
|
|
.open = ll_open,
|
|
|
|
.close = ll_close,
|
|
|
|
.recv = ll_recv,
|
|
|
|
.enqueue = ll_enqueue,
|
|
|
|
.dequeue = ll_dequeue,
|
|
|
|
.flush = ll_flush,
|
|
|
|
};
|
|
|
|
|
2010-07-24 05:04:44 +00:00
|
|
|
int __init ll_init(void)
|
2007-10-20 11:42:36 +00:00
|
|
|
{
|
2017-04-13 15:03:52 +00:00
|
|
|
serdev_device_driver_register(&hci_ti_drv);
|
|
|
|
|
2015-04-05 05:27:35 +00:00
|
|
|
return hci_uart_register_proto(&llp);
|
2007-10-20 11:42:36 +00:00
|
|
|
}
|
|
|
|
|
2010-07-24 05:04:44 +00:00
|
|
|
int __exit ll_deinit(void)
|
2007-10-20 11:42:36 +00:00
|
|
|
{
|
2017-04-13 15:03:52 +00:00
|
|
|
serdev_device_driver_unregister(&hci_ti_drv);
|
|
|
|
|
2007-10-20 11:42:36 +00:00
|
|
|
return hci_uart_unregister_proto(&llp);
|
|
|
|
}
|