Bluetooth: hciuart: Add support QCA chipset for UART
QCA61x4 chips have supported sleep feature using In-Band-Sleep commands to enable sleep feature based on H4 protocol. After sending patch/nvm configuration is done, IBS mode will be up and running Signed-off-by: Ben Young Tae Kim <ytkim@qca.qualcomm.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Ben Young Tae Kim
Marcel Holtmann
Родитель
83e81961ff
Коммит
0ff252c197
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@ -155,6 +155,19 @@ config BT_HCIUART_BCM
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Say Y here to compile support for Broadcom protocol.
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Say Y here to compile support for Broadcom protocol.
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config BT_HCIUART_QCA
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bool "Qualcomm Atheros protocol support"
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depends on BT_HCIUART
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select BT_HCIUART_H4
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select BT_QCA
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help
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The Qualcomm Atheros protocol supports HCI In-Band Sleep feature
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over serial port interface(H4) between controller and host.
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This protocol is required for UART clock control for QCA Bluetooth
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devices.
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Say Y here to compile support for QCA protocol.
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config BT_HCIBCM203X
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config BT_HCIBCM203X
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tristate "HCI BCM203x USB driver"
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tristate "HCI BCM203x USB driver"
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depends on USB
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depends on USB
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@ -35,6 +35,7 @@ hci_uart-$(CONFIG_BT_HCIUART_ATH3K) += hci_ath.o
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hci_uart-$(CONFIG_BT_HCIUART_3WIRE) += hci_h5.o
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hci_uart-$(CONFIG_BT_HCIUART_3WIRE) += hci_h5.o
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hci_uart-$(CONFIG_BT_HCIUART_INTEL) += hci_intel.o
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hci_uart-$(CONFIG_BT_HCIUART_INTEL) += hci_intel.o
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hci_uart-$(CONFIG_BT_HCIUART_BCM) += hci_bcm.o
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hci_uart-$(CONFIG_BT_HCIUART_BCM) += hci_bcm.o
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hci_uart-$(CONFIG_BT_HCIUART_QCA) += hci_qca.o
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hci_uart-objs := $(hci_uart-y)
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hci_uart-objs := $(hci_uart-y)
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ccflags-y += -D__CHECK_ENDIAN__
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ccflags-y += -D__CHECK_ENDIAN__
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@ -810,6 +810,9 @@ static int __init hci_uart_init(void)
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#ifdef CONFIG_BT_HCIUART_BCM
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#ifdef CONFIG_BT_HCIUART_BCM
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bcm_init();
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bcm_init();
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#endif
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#endif
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#ifdef CONFIG_BT_HCIUART_QCA
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qca_init();
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#endif
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return 0;
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return 0;
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}
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}
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@ -839,6 +842,9 @@ static void __exit hci_uart_exit(void)
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#ifdef CONFIG_BT_HCIUART_BCM
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#ifdef CONFIG_BT_HCIUART_BCM
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bcm_deinit();
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bcm_deinit();
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#endif
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#endif
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#ifdef CONFIG_BT_HCIUART_QCA
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qca_deinit();
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#endif
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/* Release tty registration of line discipline */
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/* Release tty registration of line discipline */
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err = tty_unregister_ldisc(N_HCI);
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err = tty_unregister_ldisc(N_HCI);
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@ -0,0 +1,969 @@
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/*
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* Bluetooth Software UART Qualcomm protocol
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*
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* HCI_IBS (HCI In-Band Sleep) is Qualcomm's 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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* Copyright (c) 2010, 2012 The Linux Foundation. All rights reserved.
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*
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* Acknowledgements:
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* This file is based on hci_ll.c, which was...
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* Written by Ohad Ben-Cohen <ohad@bencohen.org>
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* which was in turn 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/kernel.h>
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#include <linux/debugfs.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "hci_uart.h"
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#include "btqca.h"
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/* HCI_IBS protocol messages */
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#define HCI_IBS_SLEEP_IND 0xFE
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#define HCI_IBS_WAKE_IND 0xFD
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#define HCI_IBS_WAKE_ACK 0xFC
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#define HCI_MAX_IBS_SIZE 10
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/* Controller states */
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#define STATE_IN_BAND_SLEEP_ENABLED 1
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#define IBS_WAKE_RETRANS_TIMEOUT_MS 100
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#define IBS_TX_IDLE_TIMEOUT_MS 2000
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#define BAUDRATE_SETTLE_TIMEOUT_MS 300
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/* HCI_IBS transmit side sleep protocol states */
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enum tx_ibs_states {
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HCI_IBS_TX_ASLEEP,
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HCI_IBS_TX_WAKING,
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HCI_IBS_TX_AWAKE,
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};
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/* HCI_IBS receive side sleep protocol states */
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enum rx_states {
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HCI_IBS_RX_ASLEEP,
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HCI_IBS_RX_AWAKE,
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};
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/* HCI_IBS transmit and receive side clock state vote */
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enum hci_ibs_clock_state_vote {
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HCI_IBS_VOTE_STATS_UPDATE,
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HCI_IBS_TX_VOTE_CLOCK_ON,
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HCI_IBS_TX_VOTE_CLOCK_OFF,
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HCI_IBS_RX_VOTE_CLOCK_ON,
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HCI_IBS_RX_VOTE_CLOCK_OFF,
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};
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struct qca_data {
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struct hci_uart *hu;
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struct sk_buff *rx_skb;
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struct sk_buff_head txq;
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struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */
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spinlock_t hci_ibs_lock; /* HCI_IBS state lock */
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u8 tx_ibs_state; /* HCI_IBS transmit side power state*/
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u8 rx_ibs_state; /* HCI_IBS receive side power state */
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bool tx_vote; /* Clock must be on for TX */
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bool rx_vote; /* Clock must be on for RX */
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struct timer_list tx_idle_timer;
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u32 tx_idle_delay;
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struct timer_list wake_retrans_timer;
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u32 wake_retrans;
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struct workqueue_struct *workqueue;
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struct work_struct ws_awake_rx;
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struct work_struct ws_awake_device;
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struct work_struct ws_rx_vote_off;
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struct work_struct ws_tx_vote_off;
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unsigned long flags;
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/* For debugging purpose */
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u64 ibs_sent_wacks;
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u64 ibs_sent_slps;
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u64 ibs_sent_wakes;
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u64 ibs_recv_wacks;
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u64 ibs_recv_slps;
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u64 ibs_recv_wakes;
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u64 vote_last_jif;
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u32 vote_on_ms;
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u32 vote_off_ms;
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u64 tx_votes_on;
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u64 rx_votes_on;
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u64 tx_votes_off;
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u64 rx_votes_off;
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u64 votes_on;
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u64 votes_off;
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};
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static void __serial_clock_on(struct tty_struct *tty)
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{
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/* TODO: Some chipset requires to enable UART clock on client
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* side to save power consumption or manual work is required.
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* Please put your code to control UART clock here if needed
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*/
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}
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static void __serial_clock_off(struct tty_struct *tty)
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{
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/* TODO: Some chipset requires to disable UART clock on client
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* side to save power consumption or manual work is required.
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* Please put your code to control UART clock off here if needed
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*/
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}
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/* serial_clock_vote needs to be called with the ibs lock held */
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static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
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{
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struct qca_data *qca = hu->priv;
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unsigned int diff;
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bool old_vote = (qca->tx_vote | qca->rx_vote);
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bool new_vote;
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switch (vote) {
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case HCI_IBS_VOTE_STATS_UPDATE:
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diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
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if (old_vote)
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qca->vote_off_ms += diff;
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else
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qca->vote_on_ms += diff;
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return;
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case HCI_IBS_TX_VOTE_CLOCK_ON:
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qca->tx_vote = true;
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qca->tx_votes_on++;
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new_vote = true;
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break;
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case HCI_IBS_RX_VOTE_CLOCK_ON:
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qca->rx_vote = true;
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qca->rx_votes_on++;
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new_vote = true;
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break;
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case HCI_IBS_TX_VOTE_CLOCK_OFF:
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qca->tx_vote = false;
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qca->tx_votes_off++;
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new_vote = qca->rx_vote | qca->tx_vote;
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break;
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case HCI_IBS_RX_VOTE_CLOCK_OFF:
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qca->rx_vote = false;
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qca->rx_votes_off++;
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new_vote = qca->rx_vote | qca->tx_vote;
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break;
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default:
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BT_ERR("Voting irregularity");
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return;
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}
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if (new_vote != old_vote) {
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if (new_vote)
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__serial_clock_on(hu->tty);
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else
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__serial_clock_off(hu->tty);
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BT_DBG("Vote serial clock %s(%s)", new_vote? "true" : "false",
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vote? "true" : "false");
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diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
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if (new_vote) {
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qca->votes_on++;
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qca->vote_off_ms += diff;
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} else {
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qca->votes_off++;
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qca->vote_on_ms += diff;
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}
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qca->vote_last_jif = jiffies;
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}
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}
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/* Builds and sends an HCI_IBS 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_hci_ibs_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 qca_data *qca = hu->priv;
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BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
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skb = bt_skb_alloc(1, GFP_ATOMIC);
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if (!skb) {
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BT_ERR("Failed to allocate memory for HCI_IBS packet");
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return -ENOMEM;
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}
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/* Assign HCI_IBS type */
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*skb_put(skb, 1) = cmd;
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skb_queue_tail(&qca->txq, skb);
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return err;
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}
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static void qca_wq_awake_device(struct work_struct *work)
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{
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struct qca_data *qca = container_of(work, struct qca_data,
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ws_awake_device);
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struct hci_uart *hu = qca->hu;
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unsigned long retrans_delay;
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BT_DBG("hu %p wq awake device", hu);
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/* Vote for serial clock */
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serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
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spin_lock(&qca->hci_ibs_lock);
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/* Send wake indication to device */
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if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
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BT_ERR("Failed to send WAKE to device");
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qca->ibs_sent_wakes++;
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/* Start retransmit timer */
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retrans_delay = msecs_to_jiffies(qca->wake_retrans);
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mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
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spin_unlock(&qca->hci_ibs_lock);
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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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static void qca_wq_awake_rx(struct work_struct *work)
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{
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struct qca_data *qca = container_of(work, struct qca_data,
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ws_awake_rx);
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struct hci_uart *hu = qca->hu;
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BT_DBG("hu %p wq awake rx", hu);
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serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
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spin_lock(&qca->hci_ibs_lock);
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qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
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/* Always acknowledge device wake up,
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* sending IBS message doesn't count as TX ON.
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*/
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if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
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BT_ERR("Failed to acknowledge device wake up");
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qca->ibs_sent_wacks++;
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spin_unlock(&qca->hci_ibs_lock);
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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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static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
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{
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struct qca_data *qca = container_of(work, struct qca_data,
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ws_rx_vote_off);
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struct hci_uart *hu = qca->hu;
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BT_DBG("hu %p rx clock vote off", hu);
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serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
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}
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static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
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{
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struct qca_data *qca = container_of(work, struct qca_data,
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ws_tx_vote_off);
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struct hci_uart *hu = qca->hu;
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BT_DBG("hu %p tx clock vote off", hu);
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/* Run HCI tx handling unlocked */
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hci_uart_tx_wakeup(hu);
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/* Now that message queued to tty driver, vote for tty clocks off.
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* It is up to the tty driver to pend the clocks off until tx done.
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*/
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serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
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}
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static void hci_ibs_tx_idle_timeout(unsigned long arg)
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{
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||||||
|
struct hci_uart *hu = (struct hci_uart *)arg;
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
unsigned long flags;
|
||||||
|
|
||||||
|
BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
|
||||||
|
|
||||||
|
spin_lock_irqsave_nested(&qca->hci_ibs_lock,
|
||||||
|
flags, SINGLE_DEPTH_NESTING);
|
||||||
|
|
||||||
|
switch (qca->tx_ibs_state) {
|
||||||
|
case HCI_IBS_TX_AWAKE:
|
||||||
|
/* TX_IDLE, go to SLEEP */
|
||||||
|
if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
|
||||||
|
BT_ERR("Failed to send SLEEP to device");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
|
||||||
|
qca->ibs_sent_slps++;
|
||||||
|
queue_work(qca->workqueue, &qca->ws_tx_vote_off);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case HCI_IBS_TX_ASLEEP:
|
||||||
|
case HCI_IBS_TX_WAKING:
|
||||||
|
/* Fall through */
|
||||||
|
|
||||||
|
default:
|
||||||
|
BT_ERR("Spurrious timeout tx state %d", qca->tx_ibs_state);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void hci_ibs_wake_retrans_timeout(unsigned long arg)
|
||||||
|
{
|
||||||
|
struct hci_uart *hu = (struct hci_uart *)arg;
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
unsigned long flags, retrans_delay;
|
||||||
|
unsigned long retransmit = 0;
|
||||||
|
|
||||||
|
BT_DBG("hu %p wake retransmit timeout in %d state",
|
||||||
|
hu, qca->tx_ibs_state);
|
||||||
|
|
||||||
|
spin_lock_irqsave_nested(&qca->hci_ibs_lock,
|
||||||
|
flags, SINGLE_DEPTH_NESTING);
|
||||||
|
|
||||||
|
switch (qca->tx_ibs_state) {
|
||||||
|
case HCI_IBS_TX_WAKING:
|
||||||
|
/* No WAKE_ACK, retransmit WAKE */
|
||||||
|
retransmit = 1;
|
||||||
|
if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
|
||||||
|
BT_ERR("Failed to acknowledge device wake up");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
qca->ibs_sent_wakes++;
|
||||||
|
retrans_delay = msecs_to_jiffies(qca->wake_retrans);
|
||||||
|
mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case HCI_IBS_TX_ASLEEP:
|
||||||
|
case HCI_IBS_TX_AWAKE:
|
||||||
|
/* Fall through */
|
||||||
|
|
||||||
|
default:
|
||||||
|
BT_ERR("Spurrious timeout tx state %d", qca->tx_ibs_state);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
if (retransmit)
|
||||||
|
hci_uart_tx_wakeup(hu);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Initialize protocol */
|
||||||
|
static int qca_open(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
struct qca_data *qca;
|
||||||
|
|
||||||
|
BT_DBG("hu %p qca_open", hu);
|
||||||
|
|
||||||
|
qca = kzalloc(sizeof(struct qca_data), GFP_ATOMIC);
|
||||||
|
if (!qca)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
skb_queue_head_init(&qca->txq);
|
||||||
|
skb_queue_head_init(&qca->tx_wait_q);
|
||||||
|
spin_lock_init(&qca->hci_ibs_lock);
|
||||||
|
qca->workqueue = create_singlethread_workqueue("qca_wq");
|
||||||
|
if (!qca->workqueue) {
|
||||||
|
BT_ERR("QCA Workqueue not initialized properly");
|
||||||
|
kfree(qca);
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
|
INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
|
||||||
|
INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
|
||||||
|
INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
|
||||||
|
INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
|
||||||
|
|
||||||
|
qca->hu = hu;
|
||||||
|
|
||||||
|
/* Assume we start with both sides asleep -- extra wakes OK */
|
||||||
|
qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
|
||||||
|
qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
|
||||||
|
|
||||||
|
/* clocks actually on, but we start votes off */
|
||||||
|
qca->tx_vote = false;
|
||||||
|
qca->rx_vote = false;
|
||||||
|
qca->flags = 0;
|
||||||
|
|
||||||
|
qca->ibs_sent_wacks = 0;
|
||||||
|
qca->ibs_sent_slps = 0;
|
||||||
|
qca->ibs_sent_wakes = 0;
|
||||||
|
qca->ibs_recv_wacks = 0;
|
||||||
|
qca->ibs_recv_slps = 0;
|
||||||
|
qca->ibs_recv_wakes = 0;
|
||||||
|
qca->vote_last_jif = jiffies;
|
||||||
|
qca->vote_on_ms = 0;
|
||||||
|
qca->vote_off_ms = 0;
|
||||||
|
qca->votes_on = 0;
|
||||||
|
qca->votes_off = 0;
|
||||||
|
qca->tx_votes_on = 0;
|
||||||
|
qca->tx_votes_off = 0;
|
||||||
|
qca->rx_votes_on = 0;
|
||||||
|
qca->rx_votes_off = 0;
|
||||||
|
|
||||||
|
hu->priv = qca;
|
||||||
|
|
||||||
|
init_timer(&qca->wake_retrans_timer);
|
||||||
|
qca->wake_retrans_timer.function = hci_ibs_wake_retrans_timeout;
|
||||||
|
qca->wake_retrans_timer.data = (u_long)hu;
|
||||||
|
qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
|
||||||
|
|
||||||
|
init_timer(&qca->tx_idle_timer);
|
||||||
|
qca->tx_idle_timer.function = hci_ibs_tx_idle_timeout;
|
||||||
|
qca->tx_idle_timer.data = (u_long)hu;
|
||||||
|
qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS;
|
||||||
|
|
||||||
|
BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
|
||||||
|
qca->tx_idle_delay, qca->wake_retrans);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void qca_debugfs_init(struct hci_dev *hdev)
|
||||||
|
{
|
||||||
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
struct dentry *ibs_dir;
|
||||||
|
umode_t mode;
|
||||||
|
|
||||||
|
if (!hdev->debugfs)
|
||||||
|
return;
|
||||||
|
|
||||||
|
ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
|
||||||
|
|
||||||
|
/* read only */
|
||||||
|
mode = S_IRUGO;
|
||||||
|
debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
|
||||||
|
debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
|
||||||
|
debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
|
||||||
|
&qca->ibs_sent_slps);
|
||||||
|
debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
|
||||||
|
&qca->ibs_sent_wakes);
|
||||||
|
debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
|
||||||
|
&qca->ibs_sent_wacks);
|
||||||
|
debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
|
||||||
|
&qca->ibs_recv_slps);
|
||||||
|
debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
|
||||||
|
&qca->ibs_recv_wakes);
|
||||||
|
debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
|
||||||
|
&qca->ibs_recv_wacks);
|
||||||
|
debugfs_create_bool("tx_vote", mode, ibs_dir, (u32 *)&qca->tx_vote);
|
||||||
|
debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
|
||||||
|
debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
|
||||||
|
debugfs_create_bool("rx_vote", mode, ibs_dir, (u32 *)&qca->rx_vote);
|
||||||
|
debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
|
||||||
|
debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
|
||||||
|
debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
|
||||||
|
debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
|
||||||
|
debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
|
||||||
|
debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
|
||||||
|
|
||||||
|
/* read/write */
|
||||||
|
mode = S_IRUGO | S_IWUSR;
|
||||||
|
debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
|
||||||
|
debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
|
||||||
|
&qca->tx_idle_delay);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Flush protocol data */
|
||||||
|
static int qca_flush(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
|
||||||
|
BT_DBG("hu %p qca flush", hu);
|
||||||
|
|
||||||
|
skb_queue_purge(&qca->tx_wait_q);
|
||||||
|
skb_queue_purge(&qca->txq);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Close protocol */
|
||||||
|
static int qca_close(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
|
||||||
|
BT_DBG("hu %p qca close", hu);
|
||||||
|
|
||||||
|
serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
|
||||||
|
|
||||||
|
skb_queue_purge(&qca->tx_wait_q);
|
||||||
|
skb_queue_purge(&qca->txq);
|
||||||
|
del_timer(&qca->tx_idle_timer);
|
||||||
|
del_timer(&qca->wake_retrans_timer);
|
||||||
|
destroy_workqueue(qca->workqueue);
|
||||||
|
qca->hu = NULL;
|
||||||
|
|
||||||
|
kfree_skb(qca->rx_skb);
|
||||||
|
|
||||||
|
hu->priv = NULL;
|
||||||
|
|
||||||
|
kfree(qca);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Called upon a wake-up-indication from the device.
|
||||||
|
*/
|
||||||
|
static void device_want_to_wakeup(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
unsigned long flags;
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
|
||||||
|
BT_DBG("hu %p want to wake up", hu);
|
||||||
|
|
||||||
|
spin_lock_irqsave(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
qca->ibs_recv_wakes++;
|
||||||
|
|
||||||
|
switch (qca->rx_ibs_state) {
|
||||||
|
case HCI_IBS_RX_ASLEEP:
|
||||||
|
/* Make sure clock is on - we may have turned clock off since
|
||||||
|
* receiving the wake up indicator awake rx clock.
|
||||||
|
*/
|
||||||
|
queue_work(qca->workqueue, &qca->ws_awake_rx);
|
||||||
|
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
|
||||||
|
return;
|
||||||
|
|
||||||
|
case HCI_IBS_RX_AWAKE:
|
||||||
|
/* Always acknowledge device wake up,
|
||||||
|
* sending IBS message doesn't count as TX ON.
|
||||||
|
*/
|
||||||
|
if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
|
||||||
|
BT_ERR("Failed to acknowledge device wake up");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
qca->ibs_sent_wacks++;
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
/* Any other state is illegal */
|
||||||
|
BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
|
||||||
|
qca->rx_ibs_state);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
/* Actually send the packets */
|
||||||
|
hci_uart_tx_wakeup(hu);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Called upon a sleep-indication from the device.
|
||||||
|
*/
|
||||||
|
static void device_want_to_sleep(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
unsigned long flags;
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
|
||||||
|
BT_DBG("hu %p want to sleep", hu);
|
||||||
|
|
||||||
|
spin_lock_irqsave(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
qca->ibs_recv_slps++;
|
||||||
|
|
||||||
|
switch (qca->rx_ibs_state) {
|
||||||
|
case HCI_IBS_RX_AWAKE:
|
||||||
|
/* Update state */
|
||||||
|
qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
|
||||||
|
/* Vote off rx clock under workqueue */
|
||||||
|
queue_work(qca->workqueue, &qca->ws_rx_vote_off);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case HCI_IBS_RX_ASLEEP:
|
||||||
|
/* Fall through */
|
||||||
|
|
||||||
|
default:
|
||||||
|
/* Any other state is illegal */
|
||||||
|
BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
|
||||||
|
qca->rx_ibs_state);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Called upon wake-up-acknowledgement from the device
|
||||||
|
*/
|
||||||
|
static void device_woke_up(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
unsigned long flags, idle_delay;
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
struct sk_buff *skb = NULL;
|
||||||
|
|
||||||
|
BT_DBG("hu %p woke up", hu);
|
||||||
|
|
||||||
|
spin_lock_irqsave(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
qca->ibs_recv_wacks++;
|
||||||
|
|
||||||
|
switch (qca->tx_ibs_state) {
|
||||||
|
case HCI_IBS_TX_AWAKE:
|
||||||
|
/* Expect one if we send 2 WAKEs */
|
||||||
|
BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
|
||||||
|
qca->tx_ibs_state);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case HCI_IBS_TX_WAKING:
|
||||||
|
/* Send pending packets */
|
||||||
|
while ((skb = skb_dequeue(&qca->tx_wait_q)))
|
||||||
|
skb_queue_tail(&qca->txq, skb);
|
||||||
|
|
||||||
|
/* Switch timers and change state to HCI_IBS_TX_AWAKE */
|
||||||
|
del_timer(&qca->wake_retrans_timer);
|
||||||
|
idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
|
||||||
|
mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
|
||||||
|
qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case HCI_IBS_TX_ASLEEP:
|
||||||
|
/* Fall through */
|
||||||
|
|
||||||
|
default:
|
||||||
|
BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
|
||||||
|
qca->tx_ibs_state);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
/* Actually send the packets */
|
||||||
|
hci_uart_tx_wakeup(hu);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Enqueue frame for transmittion (padding, crc, etc) may be called from
|
||||||
|
* two simultaneous tasklets.
|
||||||
|
*/
|
||||||
|
static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
||||||
|
{
|
||||||
|
unsigned long flags = 0, idle_delay;
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
|
||||||
|
BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
|
||||||
|
qca->tx_ibs_state);
|
||||||
|
|
||||||
|
/* Prepend skb with frame type */
|
||||||
|
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
|
||||||
|
|
||||||
|
/* Don't go to sleep in middle of patch download or
|
||||||
|
* Out-Of-Band(GPIOs control) sleep is selected.
|
||||||
|
*/
|
||||||
|
if (!test_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags)) {
|
||||||
|
skb_queue_tail(&qca->txq, skb);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
spin_lock_irqsave(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
/* Act according to current state */
|
||||||
|
switch (qca->tx_ibs_state) {
|
||||||
|
case HCI_IBS_TX_AWAKE:
|
||||||
|
BT_DBG("Device awake, sending normally");
|
||||||
|
skb_queue_tail(&qca->txq, skb);
|
||||||
|
idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
|
||||||
|
mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case HCI_IBS_TX_ASLEEP:
|
||||||
|
BT_DBG("Device asleep, waking up and queueing packet");
|
||||||
|
/* Save packet for later */
|
||||||
|
skb_queue_tail(&qca->tx_wait_q, skb);
|
||||||
|
|
||||||
|
qca->tx_ibs_state = HCI_IBS_TX_WAKING;
|
||||||
|
/* Schedule a work queue to wake up device */
|
||||||
|
queue_work(qca->workqueue, &qca->ws_awake_device);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case HCI_IBS_TX_WAKING:
|
||||||
|
BT_DBG("Device waking up, queueing packet");
|
||||||
|
/* Transient state; just keep packet for later */
|
||||||
|
skb_queue_tail(&qca->tx_wait_q, skb);
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
BT_ERR("Illegal tx state: %d (losing packet)",
|
||||||
|
qca->tx_ibs_state);
|
||||||
|
kfree_skb(skb);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
|
||||||
|
{
|
||||||
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||||
|
|
||||||
|
BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
|
||||||
|
|
||||||
|
device_want_to_sleep(hu);
|
||||||
|
|
||||||
|
kfree_skb(skb);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
|
||||||
|
{
|
||||||
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||||
|
|
||||||
|
BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
|
||||||
|
|
||||||
|
device_want_to_wakeup(hu);
|
||||||
|
|
||||||
|
kfree_skb(skb);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
|
||||||
|
{
|
||||||
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||||
|
|
||||||
|
BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
|
||||||
|
|
||||||
|
device_woke_up(hu);
|
||||||
|
|
||||||
|
kfree_skb(skb);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define QCA_IBS_SLEEP_IND_EVENT \
|
||||||
|
.type = HCI_IBS_SLEEP_IND, \
|
||||||
|
.hlen = 0, \
|
||||||
|
.loff = 0, \
|
||||||
|
.lsize = 0, \
|
||||||
|
.maxlen = HCI_MAX_IBS_SIZE
|
||||||
|
|
||||||
|
#define QCA_IBS_WAKE_IND_EVENT \
|
||||||
|
.type = HCI_IBS_WAKE_IND, \
|
||||||
|
.hlen = 0, \
|
||||||
|
.loff = 0, \
|
||||||
|
.lsize = 0, \
|
||||||
|
.maxlen = HCI_MAX_IBS_SIZE
|
||||||
|
|
||||||
|
#define QCA_IBS_WAKE_ACK_EVENT \
|
||||||
|
.type = HCI_IBS_WAKE_ACK, \
|
||||||
|
.hlen = 0, \
|
||||||
|
.loff = 0, \
|
||||||
|
.lsize = 0, \
|
||||||
|
.maxlen = HCI_MAX_IBS_SIZE
|
||||||
|
|
||||||
|
static const struct h4_recv_pkt qca_recv_pkts[] = {
|
||||||
|
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
||||||
|
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
||||||
|
{ H4_RECV_EVENT, .recv = hci_recv_frame },
|
||||||
|
{ QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind },
|
||||||
|
{ QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack },
|
||||||
|
{ QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
|
||||||
|
};
|
||||||
|
|
||||||
|
static int qca_recv(struct hci_uart *hu, const void *data, int count)
|
||||||
|
{
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
|
||||||
|
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
||||||
|
return -EUNATCH;
|
||||||
|
|
||||||
|
qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
|
||||||
|
qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
|
||||||
|
if (IS_ERR(qca->rx_skb)) {
|
||||||
|
int err = PTR_ERR(qca->rx_skb);
|
||||||
|
BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
|
||||||
|
qca->rx_skb = NULL;
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct sk_buff *qca_dequeue(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
|
||||||
|
return skb_dequeue(&qca->txq);
|
||||||
|
}
|
||||||
|
|
||||||
|
static uint8_t qca_get_baudrate_value(int speed)
|
||||||
|
{
|
||||||
|
switch(speed) {
|
||||||
|
case 9600:
|
||||||
|
return QCA_BAUDRATE_9600;
|
||||||
|
case 19200:
|
||||||
|
return QCA_BAUDRATE_19200;
|
||||||
|
case 38400:
|
||||||
|
return QCA_BAUDRATE_38400;
|
||||||
|
case 57600:
|
||||||
|
return QCA_BAUDRATE_57600;
|
||||||
|
case 115200:
|
||||||
|
return QCA_BAUDRATE_115200;
|
||||||
|
case 230400:
|
||||||
|
return QCA_BAUDRATE_230400;
|
||||||
|
case 460800:
|
||||||
|
return QCA_BAUDRATE_460800;
|
||||||
|
case 500000:
|
||||||
|
return QCA_BAUDRATE_500000;
|
||||||
|
case 921600:
|
||||||
|
return QCA_BAUDRATE_921600;
|
||||||
|
case 1000000:
|
||||||
|
return QCA_BAUDRATE_1000000;
|
||||||
|
case 2000000:
|
||||||
|
return QCA_BAUDRATE_2000000;
|
||||||
|
case 3000000:
|
||||||
|
return QCA_BAUDRATE_3000000;
|
||||||
|
case 3500000:
|
||||||
|
return QCA_BAUDRATE_3500000;
|
||||||
|
default:
|
||||||
|
return QCA_BAUDRATE_115200;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
|
||||||
|
{
|
||||||
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
struct sk_buff *skb;
|
||||||
|
u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
|
||||||
|
|
||||||
|
if (baudrate > QCA_BAUDRATE_3000000)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
cmd[4] = baudrate;
|
||||||
|
|
||||||
|
skb = bt_skb_alloc(sizeof(cmd), GFP_ATOMIC);
|
||||||
|
if (!skb) {
|
||||||
|
BT_ERR("Failed to allocate memory for baudrate packet");
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Assign commands to change baudrate and packet type. */
|
||||||
|
memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
|
||||||
|
bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
|
||||||
|
|
||||||
|
skb_queue_tail(&qca->txq, skb);
|
||||||
|
hci_uart_tx_wakeup(hu);
|
||||||
|
|
||||||
|
/* wait 300ms to change new baudrate on controller side
|
||||||
|
* controller will come back after they receive this HCI command
|
||||||
|
* then host can communicate with new baudrate to controller
|
||||||
|
*/
|
||||||
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
||||||
|
schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
|
||||||
|
set_current_state(TASK_INTERRUPTIBLE);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int qca_setup(struct hci_uart *hu)
|
||||||
|
{
|
||||||
|
struct hci_dev *hdev = hu->hdev;
|
||||||
|
struct qca_data *qca = hu->priv;
|
||||||
|
unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
BT_INFO("%s: ROME setup", hdev->name);
|
||||||
|
|
||||||
|
/* Patch downloading has to be done without IBS mode */
|
||||||
|
clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
|
||||||
|
|
||||||
|
/* Setup initial baudrate */
|
||||||
|
speed = 0;
|
||||||
|
if (hu->init_speed)
|
||||||
|
speed = hu->init_speed;
|
||||||
|
else if (hu->proto->init_speed)
|
||||||
|
speed = hu->proto->init_speed;
|
||||||
|
|
||||||
|
if (speed)
|
||||||
|
hci_uart_set_baudrate(hu, speed);
|
||||||
|
|
||||||
|
/* Setup user speed if needed */
|
||||||
|
speed = 0;
|
||||||
|
if (hu->oper_speed)
|
||||||
|
speed = hu->oper_speed;
|
||||||
|
else if (hu->proto->oper_speed)
|
||||||
|
speed = hu->proto->oper_speed;
|
||||||
|
|
||||||
|
if (speed) {
|
||||||
|
qca_baudrate = qca_get_baudrate_value(speed);
|
||||||
|
|
||||||
|
BT_INFO("%s: Set UART speed to %d", hdev->name, speed);
|
||||||
|
ret = qca_set_baudrate(hdev, qca_baudrate);
|
||||||
|
if (ret) {
|
||||||
|
BT_ERR("%s: Failed to change the baud rate (%d)",
|
||||||
|
hdev->name, ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
hci_uart_set_baudrate(hu, speed);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Setup patch / NVM configurations */
|
||||||
|
ret = qca_uart_setup_rome(hdev, qca_baudrate);
|
||||||
|
if (!ret) {
|
||||||
|
set_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
|
||||||
|
qca_debugfs_init(hdev);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Setup bdaddr */
|
||||||
|
hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct hci_uart_proto qca_proto = {
|
||||||
|
.id = HCI_UART_QCA,
|
||||||
|
.name = "QCA",
|
||||||
|
.init_speed = 115200,
|
||||||
|
.oper_speed = 3000000,
|
||||||
|
.open = qca_open,
|
||||||
|
.close = qca_close,
|
||||||
|
.flush = qca_flush,
|
||||||
|
.setup = qca_setup,
|
||||||
|
.recv = qca_recv,
|
||||||
|
.enqueue = qca_enqueue,
|
||||||
|
.dequeue = qca_dequeue,
|
||||||
|
};
|
||||||
|
|
||||||
|
int __init qca_init(void)
|
||||||
|
{
|
||||||
|
return hci_uart_register_proto(&qca_proto);
|
||||||
|
}
|
||||||
|
|
||||||
|
int __exit qca_deinit(void)
|
||||||
|
{
|
||||||
|
return hci_uart_unregister_proto(&qca_proto);
|
||||||
|
}
|
||||||
|
|
@ -35,7 +35,7 @@
|
||||||
#define HCIUARTGETFLAGS _IOR('U', 204, int)
|
#define HCIUARTGETFLAGS _IOR('U', 204, int)
|
||||||
|
|
||||||
/* UART protocols */
|
/* UART protocols */
|
||||||
#define HCI_UART_MAX_PROTO 8
|
#define HCI_UART_MAX_PROTO 9
|
||||||
|
|
||||||
#define HCI_UART_H4 0
|
#define HCI_UART_H4 0
|
||||||
#define HCI_UART_BCSP 1
|
#define HCI_UART_BCSP 1
|
||||||
|
|
@ -45,6 +45,7 @@
|
||||||
#define HCI_UART_ATH3K 5
|
#define HCI_UART_ATH3K 5
|
||||||
#define HCI_UART_INTEL 6
|
#define HCI_UART_INTEL 6
|
||||||
#define HCI_UART_BCM 7
|
#define HCI_UART_BCM 7
|
||||||
|
#define HCI_UART_QCA 8
|
||||||
|
|
||||||
#define HCI_UART_RAW_DEVICE 0
|
#define HCI_UART_RAW_DEVICE 0
|
||||||
#define HCI_UART_RESET_ON_INIT 1
|
#define HCI_UART_RESET_ON_INIT 1
|
||||||
|
|
@ -176,3 +177,8 @@ int intel_deinit(void);
|
||||||
int bcm_init(void);
|
int bcm_init(void);
|
||||||
int bcm_deinit(void);
|
int bcm_deinit(void);
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
#ifdef CONFIG_BT_HCIUART_QCA
|
||||||
|
int qca_init(void);
|
||||||
|
int qca_deinit(void);
|
||||||
|
#endif
|
||||||
|
|
|
||||||
Загрузка…
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