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Release 4.14 drivers/bluetooth/hci_qca.c

/*
 *  Bluetooth Software UART Qualcomm protocol
 *
 *  HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management
 *  protocol extension to H4.
 *
 *  Copyright (C) 2007 Texas Instruments, Inc.
 *  Copyright (c) 2010, 2012 The Linux Foundation. All rights reserved.
 *
 *  Acknowledgements:
 *  This file is based on hci_ll.c, which was...
 *  Written by Ohad Ben-Cohen <ohad@bencohen.org>
 *  which was in turn based on hci_h4.c, which was written
 *  by Maxim Krasnyansky and Marcel Holtmann.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/kernel.h>
#include <linux/debugfs.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "hci_uart.h"
#include "btqca.h"

/* HCI_IBS protocol messages */

#define HCI_IBS_SLEEP_IND	0xFE

#define HCI_IBS_WAKE_IND	0xFD

#define HCI_IBS_WAKE_ACK	0xFC

#define HCI_MAX_IBS_SIZE	10

/* Controller states */

#define STATE_IN_BAND_SLEEP_ENABLED	1


#define IBS_WAKE_RETRANS_TIMEOUT_MS	100

#define IBS_TX_IDLE_TIMEOUT_MS		2000

#define BAUDRATE_SETTLE_TIMEOUT_MS	300

/* HCI_IBS transmit side sleep protocol states */

enum tx_ibs_states {
	
HCI_IBS_TX_ASLEEP,
	
HCI_IBS_TX_WAKING,
	
HCI_IBS_TX_AWAKE,
};

/* HCI_IBS receive side sleep protocol states */

enum rx_states {
	
HCI_IBS_RX_ASLEEP,
	
HCI_IBS_RX_AWAKE,
};

/* HCI_IBS transmit and receive side clock state vote */

enum hci_ibs_clock_state_vote {
	
HCI_IBS_VOTE_STATS_UPDATE,
	
HCI_IBS_TX_VOTE_CLOCK_ON,
	
HCI_IBS_TX_VOTE_CLOCK_OFF,
	
HCI_IBS_RX_VOTE_CLOCK_ON,
	
HCI_IBS_RX_VOTE_CLOCK_OFF,
};


struct qca_data {
	
struct hci_uart *hu;
	
struct sk_buff *rx_skb;
	
struct sk_buff_head txq;
	
struct sk_buff_head tx_wait_q;	/* HCI_IBS wait queue   */
	
spinlock_t hci_ibs_lock;	/* HCI_IBS state lock   */
	
u8 tx_ibs_state;	/* HCI_IBS transmit side power state*/
	
u8 rx_ibs_state;	/* HCI_IBS receive side power state */
	
bool tx_vote;		/* Clock must be on for TX */
	
bool rx_vote;		/* Clock must be on for RX */
	
struct timer_list tx_idle_timer;
	
u32 tx_idle_delay;
	
struct timer_list wake_retrans_timer;
	
u32 wake_retrans;
	
struct workqueue_struct *workqueue;
	
struct work_struct ws_awake_rx;
	
struct work_struct ws_awake_device;
	
struct work_struct ws_rx_vote_off;
	
struct work_struct ws_tx_vote_off;
	
unsigned long flags;

	/* For debugging purpose */
	
u64 ibs_sent_wacks;
	
u64 ibs_sent_slps;
	
u64 ibs_sent_wakes;
	
u64 ibs_recv_wacks;
	
u64 ibs_recv_slps;
	
u64 ibs_recv_wakes;
	
u64 vote_last_jif;
	
u32 vote_on_ms;
	
u32 vote_off_ms;
	
u64 tx_votes_on;
	
u64 rx_votes_on;
	
u64 tx_votes_off;
	
u64 rx_votes_off;
	
u64 votes_on;
	
u64 votes_off;
};


static void __serial_clock_on(struct tty_struct *tty) { /* TODO: Some chipset requires to enable UART clock on client * side to save power consumption or manual work is required. * Please put your code to control UART clock here if needed */ }

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static void __serial_clock_off(struct tty_struct *tty) { /* TODO: Some chipset requires to disable UART clock on client * side to save power consumption or manual work is required. * Please put your code to control UART clock off here if needed */ }

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/* serial_clock_vote needs to be called with the ibs lock held */
static void serial_clock_vote(unsigned long vote, struct hci_uart *hu) { struct qca_data *qca = hu->priv; unsigned int diff; bool old_vote = (qca->tx_vote | qca->rx_vote); bool new_vote; switch (vote) { case HCI_IBS_VOTE_STATS_UPDATE: diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); if (old_vote) qca->vote_off_ms += diff; else qca->vote_on_ms += diff; return; case HCI_IBS_TX_VOTE_CLOCK_ON: qca->tx_vote = true; qca->tx_votes_on++; new_vote = true; break; case HCI_IBS_RX_VOTE_CLOCK_ON: qca->rx_vote = true; qca->rx_votes_on++; new_vote = true; break; case HCI_IBS_TX_VOTE_CLOCK_OFF: qca->tx_vote = false; qca->tx_votes_off++; new_vote = qca->rx_vote | qca->tx_vote; break; case HCI_IBS_RX_VOTE_CLOCK_OFF: qca->rx_vote = false; qca->rx_votes_off++; new_vote = qca->rx_vote | qca->tx_vote; break; default: BT_ERR("Voting irregularity"); return; } if (new_vote != old_vote) { if (new_vote) __serial_clock_on(hu->tty); else __serial_clock_off(hu->tty); BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false", vote ? "true" : "false"); diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); if (new_vote) { qca->votes_on++; qca->vote_off_ms += diff; } else { qca->votes_off++; qca->vote_on_ms += diff; } qca->vote_last_jif = jiffies; } }

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/* Builds and sends an HCI_IBS command packet. * These are very simple packets with only 1 cmd byte. */
static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu) { int err = 0; struct sk_buff *skb = NULL; struct qca_data *qca = hu->priv; BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd); skb = bt_skb_alloc(1, GFP_ATOMIC); if (!skb) { BT_ERR("Failed to allocate memory for HCI_IBS packet"); return -ENOMEM; } /* Assign HCI_IBS type */ skb_put_u8(skb, cmd); skb_queue_tail(&qca->txq, skb); return err; }

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static void qca_wq_awake_device(struct work_struct *work) { struct qca_data *qca = container_of(work, struct qca_data, ws_awake_device); struct hci_uart *hu = qca->hu; unsigned long retrans_delay; BT_DBG("hu %p wq awake device", hu); /* Vote for serial clock */ serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu); spin_lock(&qca->hci_ibs_lock); /* Send wake indication to device */ if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) BT_ERR("Failed to send WAKE to device"); qca->ibs_sent_wakes++; /* Start retransmit timer */ retrans_delay = msecs_to_jiffies(qca->wake_retrans); mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); spin_unlock(&qca->hci_ibs_lock); /* Actually send the packets */ hci_uart_tx_wakeup(hu); }

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static void qca_wq_awake_rx(struct work_struct *work) { struct qca_data *qca = container_of(work, struct qca_data, ws_awake_rx); struct hci_uart *hu = qca->hu; BT_DBG("hu %p wq awake rx", hu); serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu); spin_lock(&qca->hci_ibs_lock); qca->rx_ibs_state = 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"); qca->ibs_sent_wacks++; spin_unlock(&qca->hci_ibs_lock); /* Actually send the packets */ hci_uart_tx_wakeup(hu); }

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static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work) { struct qca_data *qca = container_of(work, struct qca_data, ws_rx_vote_off); struct hci_uart *hu = qca->hu; BT_DBG("hu %p rx clock vote off", hu); serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu); }

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static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work) { struct qca_data *qca = container_of(work, struct qca_data, ws_tx_vote_off); struct hci_uart *hu = qca->hu; BT_DBG("hu %p tx clock vote off", hu); /* Run HCI tx handling unlocked */ hci_uart_tx_wakeup(hu); /* Now that message queued to tty driver, vote for tty clocks off. * It is up to the tty driver to pend the clocks off until tx done. */ serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); }

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static void hci_ibs_tx_idle_timeout(unsigned long arg) { 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("Spurious timeout tx state %d", qca->tx_ibs_state); break; } spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); }

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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; bool retransmit = false; 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 = true; 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("Spurious timeout tx state %d", qca->tx_ibs_state); break; } spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); if (retransmit) hci_uart_tx_wakeup(hu); }

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/* 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 = alloc_ordered_workqueue("qca_wq", 0); 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; setup_timer(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, (u_long)hu); qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS; setup_timer(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, (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; }

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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, &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, &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); }

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/* 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; }

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/* 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; }

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/* 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); }

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/* 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); }

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/* 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); }

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/* 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), &hci_skb_pkt_type(skb), 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; }

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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; }

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Ben Young Tae Kim48100.00%1100.00%
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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; }

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Ben Young Tae Kim48100.00%1100.00%
Total48100.00%1100.00%


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; }

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Ben Young Tae Kim48100.00%1100.00%
Total48100.00%1100.00%

#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; }

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Ben Young Tae Kim117100.00%1100.00%
Total117100.00%1100.00%


static struct sk_buff *qca_dequeue(struct hci_uart *hu) { struct qca_data *qca = hu->priv; return skb_dequeue(&qca->txq); }

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Ben Young Tae Kim31100.00%1100.00%
Total31100.00%1100.00%


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; } }

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Ben Young Tae Kim97100.00%1100.00%
Total97100.00%1100.00%


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. */ skb_put_data(skb, cmd, sizeof(cmd)); hci_skb_pkt_type(skb) = 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; }

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PersonTokensPropCommitsCommitProp
Ben Young Tae Kim15498.72%133.33%
Marcel Holtmann10.64%133.33%
Johannes Berg10.64%133.33%
Total156100.00%3100.00%


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; }

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Ben Young Tae Kim243100.00%1100.00%
Total243100.00%1100.00%

static struct hci_uart_proto qca_proto = { .id = HCI_UART_QCA, .name = "QCA", .manufacturer = 29, .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); }

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Ben Young Tae Kim15100.00%1100.00%
Total15100.00%1100.00%


int __exit qca_deinit(void) { return hci_uart_unregister_proto(&qca_proto); }

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PersonTokensPropCommitsCommitProp
Ben Young Tae Kim15100.00%1100.00%
Total15100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Young Tae Kim365999.24%110.00%
Prasanna Karthik110.30%220.00%
Marcel Holtmann70.19%220.00%
Johannes Berg30.08%220.00%
Bhaktipriya Shridhar30.08%110.00%
Colin Ian King20.05%110.00%
Viresh Kumar20.05%110.00%
Total3687100.00%10100.00%
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