| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * 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, 2018 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. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/clk.h> |
| #include <linux/completion.h> |
| #include <linux/debugfs.h> |
| #include <linux/delay.h> |
| #include <linux/devcoredump.h> |
| #include <linux/device.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/module.h> |
| #include <linux/of_device.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/serdev.h> |
| #include <linux/mutex.h> |
| #include <asm/unaligned.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 |
| |
| #define IBS_WAKE_RETRANS_TIMEOUT_MS 100 |
| #define IBS_BTSOC_TX_IDLE_TIMEOUT_MS 40 |
| #define IBS_HOST_TX_IDLE_TIMEOUT_MS 2000 |
| #define CMD_TRANS_TIMEOUT_MS 100 |
| #define MEMDUMP_TIMEOUT_MS 8000 |
| |
| /* susclk rate */ |
| #define SUSCLK_RATE_32KHZ 32768 |
| |
| /* Controller debug log header */ |
| #define QCA_DEBUG_HANDLE 0x2EDC |
| |
| /* max retry count when init fails */ |
| #define MAX_INIT_RETRIES 3 |
| |
| /* Controller dump header */ |
| #define QCA_SSR_DUMP_HANDLE 0x0108 |
| #define QCA_DUMP_PACKET_SIZE 255 |
| #define QCA_LAST_SEQUENCE_NUM 0xFFFF |
| #define QCA_CRASHBYTE_PACKET_LEN 1096 |
| #define QCA_MEMDUMP_BYTE 0xFB |
| |
| enum qca_flags { |
| QCA_IBS_ENABLED, |
| QCA_DROP_VENDOR_EVENT, |
| QCA_SUSPENDING, |
| QCA_MEMDUMP_COLLECTION, |
| QCA_HW_ERROR_EVENT |
| }; |
| |
| |
| /* 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, |
| }; |
| |
| /* Controller memory dump states */ |
| enum qca_memdump_states { |
| QCA_MEMDUMP_IDLE, |
| QCA_MEMDUMP_COLLECTING, |
| QCA_MEMDUMP_COLLECTED, |
| QCA_MEMDUMP_TIMEOUT, |
| }; |
| |
| struct qca_memdump_data { |
| char *memdump_buf_head; |
| char *memdump_buf_tail; |
| u32 current_seq_no; |
| u32 received_dump; |
| }; |
| |
| struct qca_memdump_event_hdr { |
| __u8 evt; |
| __u8 plen; |
| __u16 opcode; |
| __u16 seq_no; |
| __u8 reserved; |
| } __packed; |
| |
| |
| struct qca_dump_size { |
| u32 dump_size; |
| } __packed; |
| |
| 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 */ |
| struct sk_buff_head rx_memdump_q; /* Memdump 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; |
| struct work_struct ctrl_memdump_evt; |
| struct delayed_work ctrl_memdump_timeout; |
| struct qca_memdump_data *qca_memdump; |
| unsigned long flags; |
| struct completion drop_ev_comp; |
| wait_queue_head_t suspend_wait_q; |
| enum qca_memdump_states memdump_state; |
| struct mutex hci_memdump_lock; |
| |
| /* 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; |
| }; |
| |
| enum qca_speed_type { |
| QCA_INIT_SPEED = 1, |
| QCA_OPER_SPEED |
| }; |
| |
| /* |
| * Voltage regulator information required for configuring the |
| * QCA Bluetooth chipset |
| */ |
| struct qca_vreg { |
| const char *name; |
| unsigned int load_uA; |
| }; |
| |
| struct qca_vreg_data { |
| enum qca_btsoc_type soc_type; |
| struct qca_vreg *vregs; |
| size_t num_vregs; |
| }; |
| |
| /* |
| * Platform data for the QCA Bluetooth power driver. |
| */ |
| struct qca_power { |
| struct device *dev; |
| struct regulator_bulk_data *vreg_bulk; |
| int num_vregs; |
| bool vregs_on; |
| }; |
| |
| struct qca_serdev { |
| struct hci_uart serdev_hu; |
| struct gpio_desc *bt_en; |
| struct clk *susclk; |
| enum qca_btsoc_type btsoc_type; |
| struct qca_power *bt_power; |
| u32 init_speed; |
| u32 oper_speed; |
| const char *firmware_name; |
| }; |
| |
| static int qca_regulator_enable(struct qca_serdev *qcadev); |
| static void qca_regulator_disable(struct qca_serdev *qcadev); |
| static void qca_power_shutdown(struct hci_uart *hu); |
| static int qca_power_off(struct hci_dev *hdev); |
| static void qca_controller_memdump(struct work_struct *work); |
| |
| static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu) |
| { |
| enum qca_btsoc_type soc_type; |
| |
| if (hu->serdev) { |
| struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); |
| |
| soc_type = qsd->btsoc_type; |
| } else { |
| soc_type = QCA_ROME; |
| } |
| |
| return soc_type; |
| } |
| |
| static const char *qca_get_firmware_name(struct hci_uart *hu) |
| { |
| if (hu->serdev) { |
| struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); |
| |
| return qsd->firmware_name; |
| } else { |
| return NULL; |
| } |
| } |
| |
| 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 |
| */ |
| } |
| |
| 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 |
| */ |
| } |
| |
| /* 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; |
| } |
| } |
| |
| /* 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; |
| } |
| |
| 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; |
| unsigned long flags; |
| |
| BT_DBG("hu %p wq awake device", hu); |
| |
| /* Vote for serial clock */ |
| serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu); |
| |
| spin_lock_irqsave(&qca->hci_ibs_lock, flags); |
| |
| /* 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_irqrestore(&qca->hci_ibs_lock, flags); |
| |
| /* Actually send the packets */ |
| hci_uart_tx_wakeup(hu); |
| } |
| |
| 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; |
| unsigned long flags; |
| |
| BT_DBG("hu %p wq awake rx", hu); |
| |
| serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu); |
| |
| spin_lock_irqsave(&qca->hci_ibs_lock, flags); |
| 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_irqrestore(&qca->hci_ibs_lock, flags); |
| |
| /* Actually send the packets */ |
| hci_uart_tx_wakeup(hu); |
| } |
| |
| 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); |
| } |
| |
| 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); |
| } |
| |
| static void hci_ibs_tx_idle_timeout(struct timer_list *t) |
| { |
| struct qca_data *qca = from_timer(qca, t, tx_idle_timer); |
| struct hci_uart *hu = qca->hu; |
| 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); |
| } |
| |
| static void hci_ibs_wake_retrans_timeout(struct timer_list *t) |
| { |
| struct qca_data *qca = from_timer(qca, t, wake_retrans_timer); |
| struct hci_uart *hu = qca->hu; |
| 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); |
| |
| /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */ |
| if (test_bit(QCA_SUSPENDING, &qca->flags)) { |
| spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); |
| return; |
| } |
| |
| 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); |
| } |
| |
| |
| static void qca_controller_memdump_timeout(struct work_struct *work) |
| { |
| struct qca_data *qca = container_of(work, struct qca_data, |
| ctrl_memdump_timeout.work); |
| struct hci_uart *hu = qca->hu; |
| |
| mutex_lock(&qca->hci_memdump_lock); |
| if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) { |
| qca->memdump_state = QCA_MEMDUMP_TIMEOUT; |
| if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { |
| /* Inject hw error event to reset the device |
| * and driver. |
| */ |
| hci_reset_dev(hu->hdev); |
| } |
| } |
| |
| mutex_unlock(&qca->hci_memdump_lock); |
| } |
| |
| |
| /* Initialize protocol */ |
| static int qca_open(struct hci_uart *hu) |
| { |
| struct qca_serdev *qcadev; |
| struct qca_data *qca; |
| |
| BT_DBG("hu %p qca_open", hu); |
| |
| if (!hci_uart_has_flow_control(hu)) |
| return -EOPNOTSUPP; |
| |
| qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL); |
| if (!qca) |
| return -ENOMEM; |
| |
| skb_queue_head_init(&qca->txq); |
| skb_queue_head_init(&qca->tx_wait_q); |
| skb_queue_head_init(&qca->rx_memdump_q); |
| spin_lock_init(&qca->hci_ibs_lock); |
| mutex_init(&qca->hci_memdump_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); |
| INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump); |
| INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout, |
| qca_controller_memdump_timeout); |
| init_waitqueue_head(&qca->suspend_wait_q); |
| |
| qca->hu = hu; |
| init_completion(&qca->drop_ev_comp); |
| |
| /* 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; |
| |
| qca->vote_last_jif = jiffies; |
| |
| hu->priv = qca; |
| |
| if (hu->serdev) { |
| qcadev = serdev_device_get_drvdata(hu->serdev); |
| if (qca_is_wcn399x(qcadev->btsoc_type)) { |
| hu->init_speed = qcadev->init_speed; |
| hu->oper_speed = qcadev->oper_speed; |
| } |
| } |
| |
| timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0); |
| qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS; |
| |
| timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0); |
| qca->tx_idle_delay = IBS_HOST_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, &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); |
| } |
| |
| /* 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); |
| skb_queue_purge(&qca->rx_memdump_q); |
| del_timer(&qca->tx_idle_timer); |
| del_timer(&qca->wake_retrans_timer); |
| destroy_workqueue(qca->workqueue); |
| qca->hu = NULL; |
| |
| qca_power_shutdown(hu); |
| |
| 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++; |
| |
| /* Don't wake the rx up when suspending. */ |
| if (test_bit(QCA_SUSPENDING, &qca->flags)) { |
| spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); |
| return; |
| } |
| |
| 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 in %d state", hu, qca->rx_ibs_state); |
| |
| 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: |
| break; |
| |
| default: |
| /* Any other state is illegal */ |
| BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d", |
| qca->rx_ibs_state); |
| break; |
| } |
| |
| wake_up_interruptible(&qca->suspend_wait_q); |
| |
| 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++; |
| |
| /* Don't react to the wake-up-acknowledgment when suspending. */ |
| if (test_bit(QCA_SUSPENDING, &qca->flags)) { |
| spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); |
| return; |
| } |
| |
| 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), &hci_skb_pkt_type(skb), 1); |
| |
| spin_lock_irqsave(&qca->hci_ibs_lock, flags); |
| |
| /* Don't go to sleep in middle of patch download or |
| * Out-Of-Band(GPIOs control) sleep is selected. |
| * Don't wake the device up when suspending. |
| */ |
| if (!test_bit(QCA_IBS_ENABLED, &qca->flags) || |
| test_bit(QCA_SUSPENDING, &qca->flags)) { |
| skb_queue_tail(&qca->txq, skb); |
| spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); |
| return 0; |
| } |
| |
| /* 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; |
| } |
| |
| static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| /* We receive debug logs from chip as an ACL packets. |
| * Instead of sending the data to ACL to decode the |
| * received data, we are pushing them to the above layers |
| * as a diagnostic packet. |
| */ |
| if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE) |
| return hci_recv_diag(hdev, skb); |
| |
| return hci_recv_frame(hdev, skb); |
| } |
| |
| static void qca_controller_memdump(struct work_struct *work) |
| { |
| struct qca_data *qca = container_of(work, struct qca_data, |
| ctrl_memdump_evt); |
| struct hci_uart *hu = qca->hu; |
| struct sk_buff *skb; |
| struct qca_memdump_event_hdr *cmd_hdr; |
| struct qca_memdump_data *qca_memdump = qca->qca_memdump; |
| struct qca_dump_size *dump; |
| char *memdump_buf; |
| char nullBuff[QCA_DUMP_PACKET_SIZE] = { 0 }; |
| u16 seq_no; |
| u32 dump_size; |
| |
| while ((skb = skb_dequeue(&qca->rx_memdump_q))) { |
| |
| mutex_lock(&qca->hci_memdump_lock); |
| /* Skip processing the received packets if timeout detected. */ |
| if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT) { |
| mutex_unlock(&qca->hci_memdump_lock); |
| return; |
| } |
| |
| if (!qca_memdump) { |
| qca_memdump = kzalloc(sizeof(struct qca_memdump_data), |
| GFP_ATOMIC); |
| if (!qca_memdump) { |
| mutex_unlock(&qca->hci_memdump_lock); |
| return; |
| } |
| |
| qca->qca_memdump = qca_memdump; |
| } |
| |
| qca->memdump_state = QCA_MEMDUMP_COLLECTING; |
| cmd_hdr = (void *) skb->data; |
| seq_no = __le16_to_cpu(cmd_hdr->seq_no); |
| skb_pull(skb, sizeof(struct qca_memdump_event_hdr)); |
| |
| if (!seq_no) { |
| |
| /* This is the first frame of memdump packet from |
| * the controller, Disable IBS to recevie dump |
| * with out any interruption, ideally time required for |
| * the controller to send the dump is 8 seconds. let us |
| * start timer to handle this asynchronous activity. |
| */ |
| clear_bit(QCA_IBS_ENABLED, &qca->flags); |
| set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); |
| dump = (void *) skb->data; |
| dump_size = __le32_to_cpu(dump->dump_size); |
| if (!(dump_size)) { |
| bt_dev_err(hu->hdev, "Rx invalid memdump size"); |
| kfree_skb(skb); |
| mutex_unlock(&qca->hci_memdump_lock); |
| return; |
| } |
| |
| bt_dev_info(hu->hdev, "QCA collecting dump of size:%u", |
| dump_size); |
| queue_delayed_work(qca->workqueue, |
| &qca->ctrl_memdump_timeout, |
| msecs_to_jiffies(MEMDUMP_TIMEOUT_MS)); |
| |
| skb_pull(skb, sizeof(dump_size)); |
| memdump_buf = vmalloc(dump_size); |
| qca_memdump->memdump_buf_head = memdump_buf; |
| qca_memdump->memdump_buf_tail = memdump_buf; |
| } |
| |
| memdump_buf = qca_memdump->memdump_buf_tail; |
| |
| /* If sequence no 0 is missed then there is no point in |
| * accepting the other sequences. |
| */ |
| if (!memdump_buf) { |
| bt_dev_err(hu->hdev, "QCA: Discarding other packets"); |
| kfree(qca_memdump); |
| kfree_skb(skb); |
| qca->qca_memdump = NULL; |
| mutex_unlock(&qca->hci_memdump_lock); |
| return; |
| } |
| |
| /* There could be chance of missing some packets from |
| * the controller. In such cases let us store the dummy |
| * packets in the buffer. |
| */ |
| while ((seq_no > qca_memdump->current_seq_no + 1) && |
| seq_no != QCA_LAST_SEQUENCE_NUM) { |
| bt_dev_err(hu->hdev, "QCA controller missed packet:%d", |
| qca_memdump->current_seq_no); |
| memcpy(memdump_buf, nullBuff, QCA_DUMP_PACKET_SIZE); |
| memdump_buf = memdump_buf + QCA_DUMP_PACKET_SIZE; |
| qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE; |
| qca_memdump->current_seq_no++; |
| } |
| |
| memcpy(memdump_buf, (unsigned char *) skb->data, skb->len); |
| memdump_buf = memdump_buf + skb->len; |
| qca_memdump->memdump_buf_tail = memdump_buf; |
| qca_memdump->current_seq_no = seq_no + 1; |
| qca_memdump->received_dump += skb->len; |
| qca->qca_memdump = qca_memdump; |
| kfree_skb(skb); |
| if (seq_no == QCA_LAST_SEQUENCE_NUM) { |
| bt_dev_info(hu->hdev, "QCA writing crash dump of size %d bytes", |
| qca_memdump->received_dump); |
| memdump_buf = qca_memdump->memdump_buf_head; |
| dev_coredumpv(&hu->serdev->dev, memdump_buf, |
| qca_memdump->received_dump, GFP_KERNEL); |
| cancel_delayed_work(&qca->ctrl_memdump_timeout); |
| kfree(qca->qca_memdump); |
| qca->qca_memdump = NULL; |
| qca->memdump_state = QCA_MEMDUMP_COLLECTED; |
| clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); |
| } |
| |
| mutex_unlock(&qca->hci_memdump_lock); |
| } |
| |
| } |
| |
| static int qca_controller_memdump_event(struct hci_dev *hdev, |
| struct sk_buff *skb) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| |
| skb_queue_tail(&qca->rx_memdump_q, skb); |
| queue_work(qca->workqueue, &qca->ctrl_memdump_evt); |
| |
| return 0; |
| } |
| |
| static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| |
| if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) { |
| struct hci_event_hdr *hdr = (void *)skb->data; |
| |
| /* For the WCN3990 the vendor command for a baudrate change |
| * isn't sent as synchronous HCI command, because the |
| * controller sends the corresponding vendor event with the |
| * new baudrate. The event is received and properly decoded |
| * after changing the baudrate of the host port. It needs to |
| * be dropped, otherwise it can be misinterpreted as |
| * response to a later firmware download command (also a |
| * vendor command). |
| */ |
| |
| if (hdr->evt == HCI_EV_VENDOR) |
| complete(&qca->drop_ev_comp); |
| |
| kfree_skb(skb); |
| |
| return 0; |
| } |
| /* We receive chip memory dump as an event packet, With a dedicated |
| * handler followed by a hardware error event. When this event is |
| * received we store dump into a file before closing hci. This |
| * dump will help in triaging the issues. |
| */ |
| if ((skb->data[0] == HCI_VENDOR_PKT) && |
| (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE)) |
| return qca_controller_memdump_event(hdev, skb); |
| |
| return hci_recv_frame(hdev, skb); |
| } |
| |
| #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 = qca_recv_acl_data }, |
| { H4_RECV_SCO, .recv = hci_recv_frame }, |
| { H4_RECV_EVENT, .recv = qca_recv_event }, |
| { 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_dev_err(hu->hdev, "Frame reassembly failed (%d)", 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 3200000: |
| return QCA_BAUDRATE_3200000; |
| 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_3200000) |
| return -EINVAL; |
| |
| cmd[4] = baudrate; |
| |
| skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL); |
| if (!skb) { |
| bt_dev_err(hdev, "Failed to allocate 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 for the baudrate change request to be sent */ |
| |
| while (!skb_queue_empty(&qca->txq)) |
| usleep_range(100, 200); |
| |
| if (hu->serdev) |
| serdev_device_wait_until_sent(hu->serdev, |
| msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); |
| |
| /* Give the controller time to process the request */ |
| if (qca_is_wcn399x(qca_soc_type(hu))) |
| msleep(10); |
| else |
| msleep(300); |
| |
| return 0; |
| } |
| |
| static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
| { |
| if (hu->serdev) |
| serdev_device_set_baudrate(hu->serdev, speed); |
| else |
| hci_uart_set_baudrate(hu, speed); |
| } |
| |
| static int qca_send_power_pulse(struct hci_uart *hu, bool on) |
| { |
| int ret; |
| int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); |
| u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE; |
| |
| /* These power pulses are single byte command which are sent |
| * at required baudrate to wcn3990. On wcn3990, we have an external |
| * circuit at Tx pin which decodes the pulse sent at specific baudrate. |
| * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT |
| * and also we use the same power inputs to turn on and off for |
| * Wi-Fi/BT. Powering up the power sources will not enable BT, until |
| * we send a power on pulse at 115200 bps. This algorithm will help to |
| * save power. Disabling hardware flow control is mandatory while |
| * sending power pulses to SoC. |
| */ |
| bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd); |
| |
| serdev_device_write_flush(hu->serdev); |
| hci_uart_set_flow_control(hu, true); |
| ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); |
| if (ret < 0) { |
| bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd); |
| return ret; |
| } |
| |
| serdev_device_wait_until_sent(hu->serdev, timeout); |
| hci_uart_set_flow_control(hu, false); |
| |
| /* Give to controller time to boot/shutdown */ |
| if (on) |
| msleep(100); |
| else |
| msleep(10); |
| |
| return 0; |
| } |
| |
| static unsigned int qca_get_speed(struct hci_uart *hu, |
| enum qca_speed_type speed_type) |
| { |
| unsigned int speed = 0; |
| |
| if (speed_type == QCA_INIT_SPEED) { |
| if (hu->init_speed) |
| speed = hu->init_speed; |
| else if (hu->proto->init_speed) |
| speed = hu->proto->init_speed; |
| } else { |
| if (hu->oper_speed) |
| speed = hu->oper_speed; |
| else if (hu->proto->oper_speed) |
| speed = hu->proto->oper_speed; |
| } |
| |
| return speed; |
| } |
| |
| static int qca_check_speeds(struct hci_uart *hu) |
| { |
| if (qca_is_wcn399x(qca_soc_type(hu))) { |
| if (!qca_get_speed(hu, QCA_INIT_SPEED) && |
| !qca_get_speed(hu, QCA_OPER_SPEED)) |
| return -EINVAL; |
| } else { |
| if (!qca_get_speed(hu, QCA_INIT_SPEED) || |
| !qca_get_speed(hu, QCA_OPER_SPEED)) |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type) |
| { |
| unsigned int speed, qca_baudrate; |
| struct qca_data *qca = hu->priv; |
| int ret = 0; |
| |
| if (speed_type == QCA_INIT_SPEED) { |
| speed = qca_get_speed(hu, QCA_INIT_SPEED); |
| if (speed) |
| host_set_baudrate(hu, speed); |
| } else { |
| enum qca_btsoc_type soc_type = qca_soc_type(hu); |
| |
| speed = qca_get_speed(hu, QCA_OPER_SPEED); |
| if (!speed) |
| return 0; |
| |
| /* Disable flow control for wcn3990 to deassert RTS while |
| * changing the baudrate of chip and host. |
| */ |
| if (qca_is_wcn399x(soc_type)) |
| hci_uart_set_flow_control(hu, true); |
| |
| if (soc_type == QCA_WCN3990) { |
| reinit_completion(&qca->drop_ev_comp); |
| set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); |
| } |
| |
| qca_baudrate = qca_get_baudrate_value(speed); |
| bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed); |
| ret = qca_set_baudrate(hu->hdev, qca_baudrate); |
| if (ret) |
| goto error; |
| |
| host_set_baudrate(hu, speed); |
| |
| error: |
| if (qca_is_wcn399x(soc_type)) |
| hci_uart_set_flow_control(hu, false); |
| |
| if (soc_type == QCA_WCN3990) { |
| /* Wait for the controller to send the vendor event |
| * for the baudrate change command. |
| */ |
| if (!wait_for_completion_timeout(&qca->drop_ev_comp, |
| msecs_to_jiffies(100))) { |
| bt_dev_err(hu->hdev, |
| "Failed to change controller baudrate\n"); |
| ret = -ETIMEDOUT; |
| } |
| |
| clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int qca_send_crashbuffer(struct hci_uart *hu) |
| { |
| struct qca_data *qca = hu->priv; |
| struct sk_buff *skb; |
| |
| skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL); |
| if (!skb) { |
| bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet"); |
| return -ENOMEM; |
| } |
| |
| /* We forcefully crash the controller, by sending 0xfb byte for |
| * 1024 times. We also might have chance of losing data, To be |
| * on safer side we send 1096 bytes to the SoC. |
| */ |
| memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE, |
| QCA_CRASHBYTE_PACKET_LEN); |
| hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; |
| bt_dev_info(hu->hdev, "crash the soc to collect controller dump"); |
| skb_queue_tail(&qca->txq, skb); |
| hci_uart_tx_wakeup(hu); |
| |
| return 0; |
| } |
| |
| static void qca_wait_for_dump_collection(struct hci_dev *hdev) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| |
| wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION, |
| TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS); |
| |
| clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); |
| } |
| |
| static void qca_hw_error(struct hci_dev *hdev, u8 code) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| struct qca_memdump_data *qca_memdump = qca->qca_memdump; |
| char *memdump_buf = NULL; |
| |
| set_bit(QCA_HW_ERROR_EVENT, &qca->flags); |
| bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state); |
| |
| if (qca->memdump_state == QCA_MEMDUMP_IDLE) { |
| /* If hardware error event received for other than QCA |
| * soc memory dump event, then we need to crash the SOC |
| * and wait here for 8 seconds to get the dump packets. |
| * This will block main thread to be on hold until we |
| * collect dump. |
| */ |
| set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); |
| qca_send_crashbuffer(hu); |
| qca_wait_for_dump_collection(hdev); |
| } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { |
| /* Let us wait here until memory dump collected or |
| * memory dump timer expired. |
| */ |
| bt_dev_info(hdev, "waiting for dump to complete"); |
| qca_wait_for_dump_collection(hdev); |
| } |
| |
| if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { |
| bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout"); |
| mutex_lock(&qca->hci_memdump_lock); |
| if (qca_memdump) |
| memdump_buf = qca_memdump->memdump_buf_head; |
| vfree(memdump_buf); |
| kfree(qca_memdump); |
| qca->qca_memdump = NULL; |
| qca->memdump_state = QCA_MEMDUMP_TIMEOUT; |
| cancel_delayed_work(&qca->ctrl_memdump_timeout); |
| skb_queue_purge(&qca->rx_memdump_q); |
| mutex_unlock(&qca->hci_memdump_lock); |
| cancel_work_sync(&qca->ctrl_memdump_evt); |
| } |
| |
| clear_bit(QCA_HW_ERROR_EVENT, &qca->flags); |
| } |
| |
| static void qca_cmd_timeout(struct hci_dev *hdev) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| |
| if (qca->memdump_state == QCA_MEMDUMP_IDLE) |
| qca_send_crashbuffer(hu); |
| else |
| bt_dev_info(hdev, "Dump collection is in process"); |
| } |
| |
| static int qca_wcn3990_init(struct hci_uart *hu) |
| { |
| struct qca_serdev *qcadev; |
| int ret; |
| |
| /* Check for vregs status, may be hci down has turned |
| * off the voltage regulator. |
| */ |
| qcadev = serdev_device_get_drvdata(hu->serdev); |
| if (!qcadev->bt_power->vregs_on) { |
| serdev_device_close(hu->serdev); |
| ret = qca_regulator_enable(qcadev); |
| if (ret) |
| return ret; |
| |
| ret = serdev_device_open(hu->serdev); |
| if (ret) { |
| bt_dev_err(hu->hdev, "failed to open port"); |
| return ret; |
| } |
| } |
| |
| /* Forcefully enable wcn3990 to enter in to boot mode. */ |
| host_set_baudrate(hu, 2400); |
| ret = qca_send_power_pulse(hu, false); |
| if (ret) |
| return ret; |
| |
| qca_set_speed(hu, QCA_INIT_SPEED); |
| ret = qca_send_power_pulse(hu, true); |
| if (ret) |
| return ret; |
| |
| /* Now the device is in ready state to communicate with host. |
| * To sync host with device we need to reopen port. |
| * Without this, we will have RTS and CTS synchronization |
| * issues. |
| */ |
| serdev_device_close(hu->serdev); |
| ret = serdev_device_open(hu->serdev); |
| if (ret) { |
| bt_dev_err(hu->hdev, "failed to open port"); |
| return ret; |
| } |
| |
| hci_uart_set_flow_control(hu, false); |
| |
| return 0; |
| } |
| |
| static int qca_power_on(struct hci_dev *hdev) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| enum qca_btsoc_type soc_type = qca_soc_type(hu); |
| struct qca_serdev *qcadev; |
| int ret = 0; |
| |
| /* Non-serdev device usually is powered by external power |
| * and don't need additional action in driver for power on |
| */ |
| if (!hu->serdev) |
| return 0; |
| |
| if (qca_is_wcn399x(soc_type)) { |
| ret = qca_wcn3990_init(hu); |
| } else { |
| qcadev = serdev_device_get_drvdata(hu->serdev); |
| if (qcadev->bt_en) { |
| gpiod_set_value_cansleep(qcadev->bt_en, 1); |
| /* Controller needs time to bootup. */ |
| msleep(150); |
| } |
| } |
| |
| return ret; |
| } |
| |
| 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; |
| unsigned int retries = 0; |
| enum qca_btsoc_type soc_type = qca_soc_type(hu); |
| const char *firmware_name = qca_get_firmware_name(hu); |
| int ret; |
| int soc_ver = 0; |
| |
| ret = qca_check_speeds(hu); |
| if (ret) |
| return ret; |
| |
| /* Patch downloading has to be done without IBS mode */ |
| clear_bit(QCA_IBS_ENABLED, &qca->flags); |
| |
| /* Enable controller to do both LE scan and BR/EDR inquiry |
| * simultaneously. |
| */ |
| set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); |
| |
| bt_dev_info(hdev, "setting up %s", |
| qca_is_wcn399x(soc_type) ? "wcn399x" : "ROME"); |
| |
| retry: |
| ret = qca_power_on(hdev); |
| if (ret) |
| return ret; |
| |
| if (qca_is_wcn399x(soc_type)) { |
| set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks); |
| |
| ret = qca_read_soc_version(hdev, &soc_ver, soc_type); |
| if (ret) |
| return ret; |
| } else { |
| qca_set_speed(hu, QCA_INIT_SPEED); |
| } |
| |
| /* Setup user speed if needed */ |
| speed = qca_get_speed(hu, QCA_OPER_SPEED); |
| if (speed) { |
| ret = qca_set_speed(hu, QCA_OPER_SPEED); |
| if (ret) |
| return ret; |
| |
| qca_baudrate = qca_get_baudrate_value(speed); |
| } |
| |
| if (!qca_is_wcn399x(soc_type)) { |
| /* Get QCA version information */ |
| ret = qca_read_soc_version(hdev, &soc_ver, soc_type); |
| if (ret) |
| return ret; |
| } |
| |
| bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver); |
| /* Setup patch / NVM configurations */ |
| ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver, |
| firmware_name); |
| if (!ret) { |
| set_bit(QCA_IBS_ENABLED, &qca->flags); |
| qca_debugfs_init(hdev); |
| hu->hdev->hw_error = qca_hw_error; |
| hu->hdev->cmd_timeout = qca_cmd_timeout; |
| } else if (ret == -ENOENT) { |
| /* No patch/nvm-config found, run with original fw/config */ |
| ret = 0; |
| } else if (ret == -EAGAIN) { |
| /* |
| * Userspace firmware loader will return -EAGAIN in case no |
| * patch/nvm-config is found, so run with original fw/config. |
| */ |
| ret = 0; |
| } else { |
| if (retries < MAX_INIT_RETRIES) { |
| qca_power_shutdown(hu); |
| if (hu->serdev) { |
| serdev_device_close(hu->serdev); |
| ret = serdev_device_open(hu->serdev); |
| if (ret) { |
| bt_dev_err(hdev, "failed to open port"); |
| return ret; |
| } |
| } |
| retries++; |
| goto retry; |
| } |
| } |
| |
| /* Setup bdaddr */ |
| if (qca_is_wcn399x(soc_type)) |
| hu->hdev->set_bdaddr = qca_set_bdaddr; |
| else |
| hu->hdev->set_bdaddr = qca_set_bdaddr_rome; |
| |
| return ret; |
| } |
| |
| static const 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, |
| }; |
| |
| static const struct qca_vreg_data qca_soc_data_wcn3990 = { |
| .soc_type = QCA_WCN3990, |
| .vregs = (struct qca_vreg []) { |
| { "vddio", 15000 }, |
| { "vddxo", 80000 }, |
| { "vddrf", 300000 }, |
| { "vddch0", 450000 }, |
| }, |
| .num_vregs = 4, |
| }; |
| |
| static const struct qca_vreg_data qca_soc_data_wcn3991 = { |
| .soc_type = QCA_WCN3991, |
| .vregs = (struct qca_vreg []) { |
| { "vddio", 15000 }, |
| { "vddxo", 80000 }, |
| { "vddrf", 300000 }, |
| { "vddch0", 450000 }, |
| }, |
| .num_vregs = 4, |
| }; |
| |
| static const struct qca_vreg_data qca_soc_data_wcn3998 = { |
| .soc_type = QCA_WCN3998, |
| .vregs = (struct qca_vreg []) { |
| { "vddio", 10000 }, |
| { "vddxo", 80000 }, |
| { "vddrf", 300000 }, |
| { "vddch0", 450000 }, |
| }, |
| .num_vregs = 4, |
| }; |
| |
| static void qca_power_shutdown(struct hci_uart *hu) |
| { |
| struct qca_serdev *qcadev; |
| struct qca_data *qca = hu->priv; |
| unsigned long flags; |
| enum qca_btsoc_type soc_type = qca_soc_type(hu); |
| |
| qcadev = serdev_device_get_drvdata(hu->serdev); |
| |
| /* From this point we go into power off state. But serial port is |
| * still open, stop queueing the IBS data and flush all the buffered |
| * data in skb's. |
| */ |
| spin_lock_irqsave(&qca->hci_ibs_lock, flags); |
| clear_bit(QCA_IBS_ENABLED, &qca->flags); |
| qca_flush(hu); |
| spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); |
| |
| hu->hdev->hw_error = NULL; |
| hu->hdev->cmd_timeout = NULL; |
| |
| /* Non-serdev device usually is powered by external power |
| * and don't need additional action in driver for power down |
| */ |
| if (!hu->serdev) |
| return; |
| |
| if (qca_is_wcn399x(soc_type)) { |
| host_set_baudrate(hu, 2400); |
| qca_send_power_pulse(hu, false); |
| qca_regulator_disable(qcadev); |
| } else if (qcadev->bt_en) { |
| gpiod_set_value_cansleep(qcadev->bt_en, 0); |
| } |
| } |
| |
| static int qca_power_off(struct hci_dev *hdev) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| enum qca_btsoc_type soc_type = qca_soc_type(hu); |
| |
| /* Stop sending shutdown command if soc crashes. */ |
| if (qca_is_wcn399x(soc_type) |
| && qca->memdump_state == QCA_MEMDUMP_IDLE) { |
| qca_send_pre_shutdown_cmd(hdev); |
| usleep_range(8000, 10000); |
| } |
| |
| qca->memdump_state = QCA_MEMDUMP_IDLE; |
| qca_power_shutdown(hu); |
| return 0; |
| } |
| |
| static int qca_regulator_enable(struct qca_serdev *qcadev) |
| { |
| struct qca_power *power = qcadev->bt_power; |
| int ret; |
| |
| /* Already enabled */ |
| if (power->vregs_on) |
| return 0; |
| |
| BT_DBG("enabling %d regulators)", power->num_vregs); |
| |
| ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk); |
| if (ret) |
| return ret; |
| |
| power->vregs_on = true; |
| |
| ret = clk_prepare_enable(qcadev->susclk); |
| if (ret) |
| qca_regulator_disable(qcadev); |
| |
| return ret; |
| } |
| |
| static void qca_regulator_disable(struct qca_serdev *qcadev) |
| { |
| struct qca_power *power; |
| |
| if (!qcadev) |
| return; |
| |
| power = qcadev->bt_power; |
| |
| /* Already disabled? */ |
| if (!power->vregs_on) |
| return; |
| |
| regulator_bulk_disable(power->num_vregs, power->vreg_bulk); |
| power->vregs_on = false; |
| |
| clk_disable_unprepare(qcadev->susclk); |
| } |
| |
| static int qca_init_regulators(struct qca_power *qca, |
| const struct qca_vreg *vregs, size_t num_vregs) |
| { |
| struct regulator_bulk_data *bulk; |
| int ret; |
| int i; |
| |
| bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL); |
| if (!bulk) |
| return -ENOMEM; |
| |
| for (i = 0; i < num_vregs; i++) |
| bulk[i].supply = vregs[i].name; |
| |
| ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk); |
| if (ret < 0) |
| return ret; |
| |
| for (i = 0; i < num_vregs; i++) { |
| ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA); |
| if (ret) |
| return ret; |
| } |
| |
| qca->vreg_bulk = bulk; |
| qca->num_vregs = num_vregs; |
| |
| return 0; |
| } |
| |
| static int qca_serdev_probe(struct serdev_device *serdev) |
| { |
| struct qca_serdev *qcadev; |
| struct hci_dev *hdev; |
| const struct qca_vreg_data *data; |
| int err; |
| bool power_ctrl_enabled = true; |
| |
| qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL); |
| if (!qcadev) |
| return -ENOMEM; |
| |
| qcadev->serdev_hu.serdev = serdev; |
| data = device_get_match_data(&serdev->dev); |
| serdev_device_set_drvdata(serdev, qcadev); |
| device_property_read_string(&serdev->dev, "firmware-name", |
| &qcadev->firmware_name); |
| if (data && qca_is_wcn399x(data->soc_type)) { |
| qcadev->btsoc_type = data->soc_type; |
| qcadev->bt_power = devm_kzalloc(&serdev->dev, |
| sizeof(struct qca_power), |
| GFP_KERNEL); |
| if (!qcadev->bt_power) |
| return -ENOMEM; |
| |
| qcadev->bt_power->dev = &serdev->dev; |
| err = qca_init_regulators(qcadev->bt_power, data->vregs, |
| data->num_vregs); |
| if (err) { |
| BT_ERR("Failed to init regulators:%d", err); |
| return err; |
| } |
| |
| qcadev->bt_power->vregs_on = false; |
| |
| qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); |
| if (IS_ERR(qcadev->susclk)) { |
| dev_err(&serdev->dev, "failed to acquire clk\n"); |
| return PTR_ERR(qcadev->susclk); |
| } |
| |
| device_property_read_u32(&serdev->dev, "max-speed", |
| &qcadev->oper_speed); |
| if (!qcadev->oper_speed) |
| BT_DBG("UART will pick default operating speed"); |
| |
| err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); |
| if (err) { |
| BT_ERR("wcn3990 serdev registration failed"); |
| return err; |
| } |
| } else { |
| qcadev->btsoc_type = QCA_ROME; |
| qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", |
| GPIOD_OUT_LOW); |
| if (!qcadev->bt_en) { |
| dev_warn(&serdev->dev, "failed to acquire enable gpio\n"); |
| power_ctrl_enabled = false; |
| } |
| |
| qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); |
| if (!qcadev->susclk) { |
| dev_warn(&serdev->dev, "failed to acquire clk\n"); |
| } else { |
| err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ); |
| if (err) |
| return err; |
| |
| err = clk_prepare_enable(qcadev->susclk); |
| if (err) |
| return err; |
| } |
| |
| err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); |
| if (err) { |
| BT_ERR("Rome serdev registration failed"); |
| if (qcadev->susclk) |
| clk_disable_unprepare(qcadev->susclk); |
| return err; |
| } |
| } |
| |
| if (power_ctrl_enabled) { |
| hdev = qcadev->serdev_hu.hdev; |
| set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); |
| hdev->shutdown = qca_power_off; |
| } |
| |
| return 0; |
| } |
| |
| static void qca_serdev_remove(struct serdev_device *serdev) |
| { |
| struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); |
| |
| if (qca_is_wcn399x(qcadev->btsoc_type)) |
| qca_power_shutdown(&qcadev->serdev_hu); |
| else if (qcadev->susclk) |
| clk_disable_unprepare(qcadev->susclk); |
| |
| hci_uart_unregister_device(&qcadev->serdev_hu); |
| } |
| |
| static int __maybe_unused qca_suspend(struct device *dev) |
| { |
| struct hci_dev *hdev = container_of(dev, struct hci_dev, dev); |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| unsigned long flags; |
| int ret = 0; |
| u8 cmd; |
| |
| set_bit(QCA_SUSPENDING, &qca->flags); |
| |
| /* Device is downloading patch or doesn't support in-band sleep. */ |
| if (!test_bit(QCA_IBS_ENABLED, &qca->flags)) |
| return 0; |
| |
| cancel_work_sync(&qca->ws_awake_device); |
| cancel_work_sync(&qca->ws_awake_rx); |
| |
| spin_lock_irqsave_nested(&qca->hci_ibs_lock, |
| flags, SINGLE_DEPTH_NESTING); |
| |
| switch (qca->tx_ibs_state) { |
| case HCI_IBS_TX_WAKING: |
| del_timer(&qca->wake_retrans_timer); |
| /* Fall through */ |
| case HCI_IBS_TX_AWAKE: |
| del_timer(&qca->tx_idle_timer); |
| |
| serdev_device_write_flush(hu->serdev); |
| cmd = HCI_IBS_SLEEP_IND; |
| ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); |
| |
| if (ret < 0) { |
| BT_ERR("Failed to send SLEEP to device"); |
| break; |
| } |
| |
| qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; |
| qca->ibs_sent_slps++; |
| |
| qca_wq_serial_tx_clock_vote_off(&qca->ws_tx_vote_off); |
| break; |
| |
| case HCI_IBS_TX_ASLEEP: |
| break; |
| |
| default: |
| BT_ERR("Spurious tx state %d", qca->tx_ibs_state); |
| ret = -EINVAL; |
| break; |
| } |
| |
| spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); |
| |
| if (ret < 0) |
| goto error; |
| |
| serdev_device_wait_until_sent(hu->serdev, |
| msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); |
| |
| /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going |
| * to sleep, so that the packet does not wake the system later. |
| */ |
| |
| ret = wait_event_interruptible_timeout(qca->suspend_wait_q, |
| qca->rx_ibs_state == HCI_IBS_RX_ASLEEP, |
| msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS)); |
| |
| if (ret > 0) |
| return 0; |
| |
| if (ret == 0) |
| ret = -ETIMEDOUT; |
| |
| error: |
| clear_bit(QCA_SUSPENDING, &qca->flags); |
| |
| return ret; |
| } |
| |
| static int __maybe_unused qca_resume(struct device *dev) |
| { |
| struct hci_dev *hdev = container_of(dev, struct hci_dev, dev); |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct qca_data *qca = hu->priv; |
| |
| clear_bit(QCA_SUSPENDING, &qca->flags); |
| |
| return 0; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume); |
| |
| static const struct of_device_id qca_bluetooth_of_match[] = { |
| { .compatible = "qcom,qca6174-bt" }, |
| { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990}, |
| { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991}, |
| { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998}, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match); |
| |
| static struct serdev_device_driver qca_serdev_driver = { |
| .probe = qca_serdev_probe, |
| .remove = qca_serdev_remove, |
| .driver = { |
| .name = "hci_uart_qca", |
| .of_match_table = qca_bluetooth_of_match, |
| .pm = &qca_pm_ops, |
| }, |
| }; |
| |
| int __init qca_init(void) |
| { |
| serdev_device_driver_register(&qca_serdev_driver); |
| |
| return hci_uart_register_proto(&qca_proto); |
| } |
| |
| int __exit qca_deinit(void) |
| { |
| serdev_device_driver_unregister(&qca_serdev_driver); |
| |
| return hci_uart_unregister_proto(&qca_proto); |
| } |