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![Bart Van Assche](/assets/img/avatar_default.png)
wait_on_bit_timeout() returns one of the following three values: * 0 to indicate success. * -EINTR to indicate that a signal has been received; * -EAGAIN to indicate timeout; Make the wait_on_bit_timeout() callers check for these values. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
1279 lines
31 KiB
C
1279 lines
31 KiB
C
/*
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*
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* Bluetooth HCI UART driver for Intel devices
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*
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* Copyright (C) 2015 Intel Corporation
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*
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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/errno.h>
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#include <linux/skbuff.h>
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#include <linux/firmware.h>
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#include <linux/module.h>
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#include <linux/wait.h>
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#include <linux/tty.h>
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#include <linux/platform_device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/acpi.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.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 "btintel.h"
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#define STATE_BOOTLOADER 0
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#define STATE_DOWNLOADING 1
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#define STATE_FIRMWARE_LOADED 2
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#define STATE_FIRMWARE_FAILED 3
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#define STATE_BOOTING 4
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#define STATE_LPM_ENABLED 5
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#define STATE_TX_ACTIVE 6
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#define STATE_SUSPENDED 7
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#define STATE_LPM_TRANSACTION 8
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#define HCI_LPM_WAKE_PKT 0xf0
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#define HCI_LPM_PKT 0xf1
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#define HCI_LPM_MAX_SIZE 10
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#define HCI_LPM_HDR_SIZE HCI_EVENT_HDR_SIZE
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#define LPM_OP_TX_NOTIFY 0x00
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#define LPM_OP_SUSPEND_ACK 0x02
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#define LPM_OP_RESUME_ACK 0x03
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#define LPM_SUSPEND_DELAY_MS 1000
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struct hci_lpm_pkt {
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__u8 opcode;
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__u8 dlen;
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__u8 data[0];
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} __packed;
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struct intel_device {
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struct list_head list;
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struct platform_device *pdev;
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struct gpio_desc *reset;
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struct hci_uart *hu;
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struct mutex hu_lock;
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int irq;
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};
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static LIST_HEAD(intel_device_list);
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static DEFINE_MUTEX(intel_device_list_lock);
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struct intel_data {
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struct sk_buff *rx_skb;
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struct sk_buff_head txq;
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struct work_struct busy_work;
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struct hci_uart *hu;
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unsigned long flags;
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};
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static u8 intel_convert_speed(unsigned int speed)
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{
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switch (speed) {
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case 9600:
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return 0x00;
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case 19200:
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return 0x01;
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case 38400:
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return 0x02;
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case 57600:
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return 0x03;
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case 115200:
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return 0x04;
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case 230400:
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return 0x05;
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case 460800:
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return 0x06;
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case 921600:
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return 0x07;
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case 1843200:
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return 0x08;
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case 3250000:
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return 0x09;
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case 2000000:
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return 0x0a;
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case 3000000:
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return 0x0b;
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default:
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return 0xff;
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}
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}
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static int intel_wait_booting(struct hci_uart *hu)
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{
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struct intel_data *intel = hu->priv;
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int err;
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err = wait_on_bit_timeout(&intel->flags, STATE_BOOTING,
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TASK_INTERRUPTIBLE,
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msecs_to_jiffies(1000));
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if (err == -EINTR) {
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bt_dev_err(hu->hdev, "Device boot interrupted");
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return -EINTR;
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}
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if (err) {
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bt_dev_err(hu->hdev, "Device boot timeout");
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return -ETIMEDOUT;
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}
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return err;
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}
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#ifdef CONFIG_PM
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static int intel_wait_lpm_transaction(struct hci_uart *hu)
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{
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struct intel_data *intel = hu->priv;
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int err;
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err = wait_on_bit_timeout(&intel->flags, STATE_LPM_TRANSACTION,
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TASK_INTERRUPTIBLE,
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msecs_to_jiffies(1000));
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if (err == -EINTR) {
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bt_dev_err(hu->hdev, "LPM transaction interrupted");
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return -EINTR;
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}
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if (err) {
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bt_dev_err(hu->hdev, "LPM transaction timeout");
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return -ETIMEDOUT;
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}
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return err;
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}
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static int intel_lpm_suspend(struct hci_uart *hu)
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{
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static const u8 suspend[] = { 0x01, 0x01, 0x01 };
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struct intel_data *intel = hu->priv;
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struct sk_buff *skb;
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if (!test_bit(STATE_LPM_ENABLED, &intel->flags) ||
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test_bit(STATE_SUSPENDED, &intel->flags))
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return 0;
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if (test_bit(STATE_TX_ACTIVE, &intel->flags))
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return -EAGAIN;
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bt_dev_dbg(hu->hdev, "Suspending");
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skb = bt_skb_alloc(sizeof(suspend), GFP_KERNEL);
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if (!skb) {
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bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
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return -ENOMEM;
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}
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memcpy(skb_put(skb, sizeof(suspend)), suspend, sizeof(suspend));
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hci_skb_pkt_type(skb) = HCI_LPM_PKT;
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set_bit(STATE_LPM_TRANSACTION, &intel->flags);
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/* LPM flow is a priority, enqueue packet at list head */
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skb_queue_head(&intel->txq, skb);
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hci_uart_tx_wakeup(hu);
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intel_wait_lpm_transaction(hu);
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/* Even in case of failure, continue and test the suspended flag */
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clear_bit(STATE_LPM_TRANSACTION, &intel->flags);
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if (!test_bit(STATE_SUSPENDED, &intel->flags)) {
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bt_dev_err(hu->hdev, "Device suspend error");
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return -EINVAL;
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}
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bt_dev_dbg(hu->hdev, "Suspended");
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hci_uart_set_flow_control(hu, true);
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return 0;
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}
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static int intel_lpm_resume(struct hci_uart *hu)
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{
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struct intel_data *intel = hu->priv;
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struct sk_buff *skb;
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if (!test_bit(STATE_LPM_ENABLED, &intel->flags) ||
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!test_bit(STATE_SUSPENDED, &intel->flags))
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return 0;
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bt_dev_dbg(hu->hdev, "Resuming");
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hci_uart_set_flow_control(hu, false);
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skb = bt_skb_alloc(0, GFP_KERNEL);
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if (!skb) {
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bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
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return -ENOMEM;
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}
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hci_skb_pkt_type(skb) = HCI_LPM_WAKE_PKT;
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set_bit(STATE_LPM_TRANSACTION, &intel->flags);
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/* LPM flow is a priority, enqueue packet at list head */
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skb_queue_head(&intel->txq, skb);
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hci_uart_tx_wakeup(hu);
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intel_wait_lpm_transaction(hu);
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/* Even in case of failure, continue and test the suspended flag */
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clear_bit(STATE_LPM_TRANSACTION, &intel->flags);
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if (test_bit(STATE_SUSPENDED, &intel->flags)) {
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bt_dev_err(hu->hdev, "Device resume error");
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return -EINVAL;
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}
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bt_dev_dbg(hu->hdev, "Resumed");
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return 0;
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}
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#endif /* CONFIG_PM */
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static int intel_lpm_host_wake(struct hci_uart *hu)
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{
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static const u8 lpm_resume_ack[] = { LPM_OP_RESUME_ACK, 0x00 };
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struct intel_data *intel = hu->priv;
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struct sk_buff *skb;
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hci_uart_set_flow_control(hu, false);
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clear_bit(STATE_SUSPENDED, &intel->flags);
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skb = bt_skb_alloc(sizeof(lpm_resume_ack), GFP_KERNEL);
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if (!skb) {
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bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
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return -ENOMEM;
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}
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memcpy(skb_put(skb, sizeof(lpm_resume_ack)), lpm_resume_ack,
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sizeof(lpm_resume_ack));
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hci_skb_pkt_type(skb) = HCI_LPM_PKT;
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/* LPM flow is a priority, enqueue packet at list head */
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skb_queue_head(&intel->txq, skb);
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hci_uart_tx_wakeup(hu);
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bt_dev_dbg(hu->hdev, "Resumed by controller");
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return 0;
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}
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static irqreturn_t intel_irq(int irq, void *dev_id)
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{
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struct intel_device *idev = dev_id;
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dev_info(&idev->pdev->dev, "hci_intel irq\n");
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mutex_lock(&idev->hu_lock);
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if (idev->hu)
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intel_lpm_host_wake(idev->hu);
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mutex_unlock(&idev->hu_lock);
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/* Host/Controller are now LPM resumed, trigger a new delayed suspend */
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pm_runtime_get(&idev->pdev->dev);
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pm_runtime_mark_last_busy(&idev->pdev->dev);
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pm_runtime_put_autosuspend(&idev->pdev->dev);
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return IRQ_HANDLED;
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}
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static int intel_set_power(struct hci_uart *hu, bool powered)
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{
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struct list_head *p;
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int err = -ENODEV;
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mutex_lock(&intel_device_list_lock);
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list_for_each(p, &intel_device_list) {
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struct intel_device *idev = list_entry(p, struct intel_device,
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list);
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/* tty device and pdev device should share the same parent
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* which is the UART port.
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*/
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if (hu->tty->dev->parent != idev->pdev->dev.parent)
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continue;
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if (!idev->reset) {
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err = -ENOTSUPP;
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break;
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}
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BT_INFO("hu %p, Switching compatible pm device (%s) to %u",
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hu, dev_name(&idev->pdev->dev), powered);
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gpiod_set_value(idev->reset, powered);
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/* Provide to idev a hu reference which is used to run LPM
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* transactions (lpm suspend/resume) from PM callbacks.
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* hu needs to be protected against concurrent removing during
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* these PM ops.
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*/
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mutex_lock(&idev->hu_lock);
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idev->hu = powered ? hu : NULL;
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mutex_unlock(&idev->hu_lock);
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if (idev->irq < 0)
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break;
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if (powered && device_can_wakeup(&idev->pdev->dev)) {
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err = devm_request_threaded_irq(&idev->pdev->dev,
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idev->irq, NULL,
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intel_irq,
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IRQF_ONESHOT,
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"bt-host-wake", idev);
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if (err) {
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BT_ERR("hu %p, unable to allocate irq-%d",
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hu, idev->irq);
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break;
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}
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device_wakeup_enable(&idev->pdev->dev);
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pm_runtime_set_active(&idev->pdev->dev);
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pm_runtime_use_autosuspend(&idev->pdev->dev);
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pm_runtime_set_autosuspend_delay(&idev->pdev->dev,
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LPM_SUSPEND_DELAY_MS);
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pm_runtime_enable(&idev->pdev->dev);
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} else if (!powered && device_may_wakeup(&idev->pdev->dev)) {
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devm_free_irq(&idev->pdev->dev, idev->irq, idev);
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device_wakeup_disable(&idev->pdev->dev);
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pm_runtime_disable(&idev->pdev->dev);
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}
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}
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mutex_unlock(&intel_device_list_lock);
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return err;
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}
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static void intel_busy_work(struct work_struct *work)
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{
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struct list_head *p;
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struct intel_data *intel = container_of(work, struct intel_data,
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busy_work);
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/* Link is busy, delay the suspend */
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mutex_lock(&intel_device_list_lock);
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list_for_each(p, &intel_device_list) {
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struct intel_device *idev = list_entry(p, struct intel_device,
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list);
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if (intel->hu->tty->dev->parent == idev->pdev->dev.parent) {
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pm_runtime_get(&idev->pdev->dev);
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pm_runtime_mark_last_busy(&idev->pdev->dev);
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pm_runtime_put_autosuspend(&idev->pdev->dev);
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break;
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}
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}
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mutex_unlock(&intel_device_list_lock);
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}
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static int intel_open(struct hci_uart *hu)
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{
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struct intel_data *intel;
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BT_DBG("hu %p", hu);
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intel = kzalloc(sizeof(*intel), GFP_KERNEL);
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if (!intel)
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return -ENOMEM;
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skb_queue_head_init(&intel->txq);
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INIT_WORK(&intel->busy_work, intel_busy_work);
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intel->hu = hu;
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hu->priv = intel;
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if (!intel_set_power(hu, true))
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set_bit(STATE_BOOTING, &intel->flags);
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return 0;
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}
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static int intel_close(struct hci_uart *hu)
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{
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struct intel_data *intel = hu->priv;
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BT_DBG("hu %p", hu);
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cancel_work_sync(&intel->busy_work);
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intel_set_power(hu, false);
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skb_queue_purge(&intel->txq);
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kfree_skb(intel->rx_skb);
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kfree(intel);
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hu->priv = NULL;
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return 0;
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}
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static int intel_flush(struct hci_uart *hu)
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{
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struct intel_data *intel = hu->priv;
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BT_DBG("hu %p", hu);
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skb_queue_purge(&intel->txq);
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return 0;
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}
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static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
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{
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struct sk_buff *skb;
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struct hci_event_hdr *hdr;
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struct hci_ev_cmd_complete *evt;
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skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
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hdr->evt = HCI_EV_CMD_COMPLETE;
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hdr->plen = sizeof(*evt) + 1;
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evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
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evt->ncmd = 0x01;
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evt->opcode = cpu_to_le16(opcode);
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*skb_put(skb, 1) = 0x00;
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hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
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return hci_recv_frame(hdev, skb);
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}
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static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed)
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{
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struct intel_data *intel = hu->priv;
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struct hci_dev *hdev = hu->hdev;
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u8 speed_cmd[] = { 0x06, 0xfc, 0x01, 0x00 };
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struct sk_buff *skb;
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int err;
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/* This can be the first command sent to the chip, check
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* that the controller is ready.
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*/
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err = intel_wait_booting(hu);
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clear_bit(STATE_BOOTING, &intel->flags);
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/* In case of timeout, try to continue anyway */
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if (err && err != -ETIMEDOUT)
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return err;
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bt_dev_info(hdev, "Change controller speed to %d", speed);
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speed_cmd[3] = intel_convert_speed(speed);
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if (speed_cmd[3] == 0xff) {
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bt_dev_err(hdev, "Unsupported speed");
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return -EINVAL;
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}
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|
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/* Device will not accept speed change if Intel version has not been
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* previously requested.
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*/
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skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
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if (IS_ERR(skb)) {
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bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
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PTR_ERR(skb));
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return PTR_ERR(skb);
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}
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kfree_skb(skb);
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skb = bt_skb_alloc(sizeof(speed_cmd), GFP_KERNEL);
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if (!skb) {
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bt_dev_err(hdev, "Failed to alloc memory for baudrate packet");
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return -ENOMEM;
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}
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|
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memcpy(skb_put(skb, sizeof(speed_cmd)), speed_cmd, sizeof(speed_cmd));
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hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
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|
hci_uart_set_flow_control(hu, true);
|
|
|
|
skb_queue_tail(&intel->txq, skb);
|
|
hci_uart_tx_wakeup(hu);
|
|
|
|
/* wait 100ms to change baudrate on controller side */
|
|
msleep(100);
|
|
|
|
hci_uart_set_baudrate(hu, speed);
|
|
hci_uart_set_flow_control(hu, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_setup(struct hci_uart *hu)
|
|
{
|
|
static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
|
|
0x00, 0x08, 0x04, 0x00 };
|
|
struct intel_data *intel = hu->priv;
|
|
struct hci_dev *hdev = hu->hdev;
|
|
struct sk_buff *skb;
|
|
struct intel_version ver;
|
|
struct intel_boot_params *params;
|
|
struct list_head *p;
|
|
const struct firmware *fw;
|
|
const u8 *fw_ptr;
|
|
char fwname[64];
|
|
u32 frag_len;
|
|
ktime_t calltime, delta, rettime;
|
|
unsigned long long duration;
|
|
unsigned int init_speed, oper_speed;
|
|
int speed_change = 0;
|
|
int err;
|
|
|
|
bt_dev_dbg(hdev, "start intel_setup");
|
|
|
|
hu->hdev->set_diag = btintel_set_diag;
|
|
hu->hdev->set_bdaddr = btintel_set_bdaddr;
|
|
|
|
calltime = ktime_get();
|
|
|
|
if (hu->init_speed)
|
|
init_speed = hu->init_speed;
|
|
else
|
|
init_speed = hu->proto->init_speed;
|
|
|
|
if (hu->oper_speed)
|
|
oper_speed = hu->oper_speed;
|
|
else
|
|
oper_speed = hu->proto->oper_speed;
|
|
|
|
if (oper_speed && init_speed && oper_speed != init_speed)
|
|
speed_change = 1;
|
|
|
|
/* Check that the controller is ready */
|
|
err = intel_wait_booting(hu);
|
|
|
|
clear_bit(STATE_BOOTING, &intel->flags);
|
|
|
|
/* In case of timeout, try to continue anyway */
|
|
if (err && err != -ETIMEDOUT)
|
|
return err;
|
|
|
|
set_bit(STATE_BOOTLOADER, &intel->flags);
|
|
|
|
/* Read the Intel version information to determine if the device
|
|
* is in bootloader mode or if it already has operational firmware
|
|
* loaded.
|
|
*/
|
|
err = btintel_read_version(hdev, &ver);
|
|
if (err)
|
|
return err;
|
|
|
|
/* The hardware platform number has a fixed value of 0x37 and
|
|
* for now only accept this single value.
|
|
*/
|
|
if (ver.hw_platform != 0x37) {
|
|
bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)",
|
|
ver.hw_platform);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is
|
|
* supported by this firmware loading method. This check has been
|
|
* put in place to ensure correct forward compatibility options
|
|
* when newer hardware variants come along.
|
|
*/
|
|
if (ver.hw_variant != 0x0b) {
|
|
bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
|
|
ver.hw_variant);
|
|
return -EINVAL;
|
|
}
|
|
|
|
btintel_version_info(hdev, &ver);
|
|
|
|
/* The firmware variant determines if the device is in bootloader
|
|
* mode or is running operational firmware. The value 0x06 identifies
|
|
* the bootloader and the value 0x23 identifies the operational
|
|
* firmware.
|
|
*
|
|
* When the operational firmware is already present, then only
|
|
* the check for valid Bluetooth device address is needed. This
|
|
* determines if the device will be added as configured or
|
|
* unconfigured controller.
|
|
*
|
|
* It is not possible to use the Secure Boot Parameters in this
|
|
* case since that command is only available in bootloader mode.
|
|
*/
|
|
if (ver.fw_variant == 0x23) {
|
|
clear_bit(STATE_BOOTLOADER, &intel->flags);
|
|
btintel_check_bdaddr(hdev);
|
|
return 0;
|
|
}
|
|
|
|
/* If the device is not in bootloader mode, then the only possible
|
|
* choice is to return an error and abort the device initialization.
|
|
*/
|
|
if (ver.fw_variant != 0x06) {
|
|
bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)",
|
|
ver.fw_variant);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Read the secure boot parameters to identify the operating
|
|
* details of the bootloader.
|
|
*/
|
|
skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_CMD_TIMEOUT);
|
|
if (IS_ERR(skb)) {
|
|
bt_dev_err(hdev, "Reading Intel boot parameters failed (%ld)",
|
|
PTR_ERR(skb));
|
|
return PTR_ERR(skb);
|
|
}
|
|
|
|
if (skb->len != sizeof(*params)) {
|
|
bt_dev_err(hdev, "Intel boot parameters size mismatch");
|
|
kfree_skb(skb);
|
|
return -EILSEQ;
|
|
}
|
|
|
|
params = (struct intel_boot_params *)skb->data;
|
|
if (params->status) {
|
|
bt_dev_err(hdev, "Intel boot parameters command failure (%02x)",
|
|
params->status);
|
|
err = -bt_to_errno(params->status);
|
|
kfree_skb(skb);
|
|
return err;
|
|
}
|
|
|
|
bt_dev_info(hdev, "Device revision is %u",
|
|
le16_to_cpu(params->dev_revid));
|
|
|
|
bt_dev_info(hdev, "Secure boot is %s",
|
|
params->secure_boot ? "enabled" : "disabled");
|
|
|
|
bt_dev_info(hdev, "Minimum firmware build %u week %u %u",
|
|
params->min_fw_build_nn, params->min_fw_build_cw,
|
|
2000 + params->min_fw_build_yy);
|
|
|
|
/* It is required that every single firmware fragment is acknowledged
|
|
* with a command complete event. If the boot parameters indicate
|
|
* that this bootloader does not send them, then abort the setup.
|
|
*/
|
|
if (params->limited_cce != 0x00) {
|
|
bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)",
|
|
params->limited_cce);
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* If the OTP has no valid Bluetooth device address, then there will
|
|
* also be no valid address for the operational firmware.
|
|
*/
|
|
if (!bacmp(¶ms->otp_bdaddr, BDADDR_ANY)) {
|
|
bt_dev_info(hdev, "No device address configured");
|
|
set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
|
|
}
|
|
|
|
/* With this Intel bootloader only the hardware variant and device
|
|
* revision information are used to select the right firmware.
|
|
*
|
|
* Currently this bootloader support is limited to hardware variant
|
|
* iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
|
|
*/
|
|
snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
|
|
le16_to_cpu(params->dev_revid));
|
|
|
|
err = request_firmware(&fw, fwname, &hdev->dev);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to load Intel firmware file (%d)",
|
|
err);
|
|
kfree_skb(skb);
|
|
return err;
|
|
}
|
|
|
|
bt_dev_info(hdev, "Found device firmware: %s", fwname);
|
|
|
|
/* Save the DDC file name for later */
|
|
snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
|
|
le16_to_cpu(params->dev_revid));
|
|
|
|
kfree_skb(skb);
|
|
|
|
if (fw->size < 644) {
|
|
bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
|
|
fw->size);
|
|
err = -EBADF;
|
|
goto done;
|
|
}
|
|
|
|
set_bit(STATE_DOWNLOADING, &intel->flags);
|
|
|
|
/* Start the firmware download transaction with the Init fragment
|
|
* represented by the 128 bytes of CSS header.
|
|
*/
|
|
err = btintel_secure_send(hdev, 0x00, 128, fw->data);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
|
|
goto done;
|
|
}
|
|
|
|
/* Send the 256 bytes of public key information from the firmware
|
|
* as the PKey fragment.
|
|
*/
|
|
err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to send firmware public key (%d)",
|
|
err);
|
|
goto done;
|
|
}
|
|
|
|
/* Send the 256 bytes of signature information from the firmware
|
|
* as the Sign fragment.
|
|
*/
|
|
err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to send firmware signature (%d)",
|
|
err);
|
|
goto done;
|
|
}
|
|
|
|
fw_ptr = fw->data + 644;
|
|
frag_len = 0;
|
|
|
|
while (fw_ptr - fw->data < fw->size) {
|
|
struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
|
|
|
|
frag_len += sizeof(*cmd) + cmd->plen;
|
|
|
|
bt_dev_dbg(hdev, "Patching %td/%zu", (fw_ptr - fw->data),
|
|
fw->size);
|
|
|
|
/* The parameter length of the secure send command requires
|
|
* a 4 byte alignment. It happens so that the firmware file
|
|
* contains proper Intel_NOP commands to align the fragments
|
|
* as needed.
|
|
*
|
|
* Send set of commands with 4 byte alignment from the
|
|
* firmware data buffer as a single Data fragement.
|
|
*/
|
|
if (frag_len % 4)
|
|
continue;
|
|
|
|
/* Send each command from the firmware data buffer as
|
|
* a single Data fragment.
|
|
*/
|
|
err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to send firmware data (%d)",
|
|
err);
|
|
goto done;
|
|
}
|
|
|
|
fw_ptr += frag_len;
|
|
frag_len = 0;
|
|
}
|
|
|
|
set_bit(STATE_FIRMWARE_LOADED, &intel->flags);
|
|
|
|
bt_dev_info(hdev, "Waiting for firmware download to complete");
|
|
|
|
/* Before switching the device into operational mode and with that
|
|
* booting the loaded firmware, wait for the bootloader notification
|
|
* that all fragments have been successfully received.
|
|
*
|
|
* When the event processing receives the notification, then the
|
|
* STATE_DOWNLOADING flag will be cleared.
|
|
*
|
|
* The firmware loading should not take longer than 5 seconds
|
|
* and thus just timeout if that happens and fail the setup
|
|
* of this device.
|
|
*/
|
|
err = wait_on_bit_timeout(&intel->flags, STATE_DOWNLOADING,
|
|
TASK_INTERRUPTIBLE,
|
|
msecs_to_jiffies(5000));
|
|
if (err == -EINTR) {
|
|
bt_dev_err(hdev, "Firmware loading interrupted");
|
|
err = -EINTR;
|
|
goto done;
|
|
}
|
|
|
|
if (err) {
|
|
bt_dev_err(hdev, "Firmware loading timeout");
|
|
err = -ETIMEDOUT;
|
|
goto done;
|
|
}
|
|
|
|
if (test_bit(STATE_FIRMWARE_FAILED, &intel->flags)) {
|
|
bt_dev_err(hdev, "Firmware loading failed");
|
|
err = -ENOEXEC;
|
|
goto done;
|
|
}
|
|
|
|
rettime = ktime_get();
|
|
delta = ktime_sub(rettime, calltime);
|
|
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
|
|
|
|
bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);
|
|
|
|
done:
|
|
release_firmware(fw);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* We need to restore the default speed before Intel reset */
|
|
if (speed_change) {
|
|
err = intel_set_baudrate(hu, init_speed);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
calltime = ktime_get();
|
|
|
|
set_bit(STATE_BOOTING, &intel->flags);
|
|
|
|
skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param,
|
|
HCI_CMD_TIMEOUT);
|
|
if (IS_ERR(skb))
|
|
return PTR_ERR(skb);
|
|
|
|
kfree_skb(skb);
|
|
|
|
/* The bootloader will not indicate when the device is ready. This
|
|
* is done by the operational firmware sending bootup notification.
|
|
*
|
|
* Booting into operational firmware should not take longer than
|
|
* 1 second. However if that happens, then just fail the setup
|
|
* since something went wrong.
|
|
*/
|
|
bt_dev_info(hdev, "Waiting for device to boot");
|
|
|
|
err = intel_wait_booting(hu);
|
|
if (err)
|
|
return err;
|
|
|
|
clear_bit(STATE_BOOTING, &intel->flags);
|
|
|
|
rettime = ktime_get();
|
|
delta = ktime_sub(rettime, calltime);
|
|
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
|
|
|
|
bt_dev_info(hdev, "Device booted in %llu usecs", duration);
|
|
|
|
/* Enable LPM if matching pdev with wakeup enabled, set TX active
|
|
* until further LPM TX notification.
|
|
*/
|
|
mutex_lock(&intel_device_list_lock);
|
|
list_for_each(p, &intel_device_list) {
|
|
struct intel_device *dev = list_entry(p, struct intel_device,
|
|
list);
|
|
if (hu->tty->dev->parent == dev->pdev->dev.parent) {
|
|
if (device_may_wakeup(&dev->pdev->dev)) {
|
|
set_bit(STATE_LPM_ENABLED, &intel->flags);
|
|
set_bit(STATE_TX_ACTIVE, &intel->flags);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&intel_device_list_lock);
|
|
|
|
/* Ignore errors, device can work without DDC parameters */
|
|
btintel_load_ddc_config(hdev, fwname);
|
|
|
|
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_CMD_TIMEOUT);
|
|
if (IS_ERR(skb))
|
|
return PTR_ERR(skb);
|
|
kfree_skb(skb);
|
|
|
|
if (speed_change) {
|
|
err = intel_set_baudrate(hu, oper_speed);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
bt_dev_info(hdev, "Setup complete");
|
|
|
|
clear_bit(STATE_BOOTLOADER, &intel->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
|
|
{
|
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
|
struct intel_data *intel = hu->priv;
|
|
struct hci_event_hdr *hdr;
|
|
|
|
if (!test_bit(STATE_BOOTLOADER, &intel->flags) &&
|
|
!test_bit(STATE_BOOTING, &intel->flags))
|
|
goto recv;
|
|
|
|
hdr = (void *)skb->data;
|
|
|
|
/* When the firmware loading completes the device sends
|
|
* out a vendor specific event indicating the result of
|
|
* the firmware loading.
|
|
*/
|
|
if (skb->len == 7 && hdr->evt == 0xff && hdr->plen == 0x05 &&
|
|
skb->data[2] == 0x06) {
|
|
if (skb->data[3] != 0x00)
|
|
set_bit(STATE_FIRMWARE_FAILED, &intel->flags);
|
|
|
|
if (test_and_clear_bit(STATE_DOWNLOADING, &intel->flags) &&
|
|
test_bit(STATE_FIRMWARE_LOADED, &intel->flags)) {
|
|
smp_mb__after_atomic();
|
|
wake_up_bit(&intel->flags, STATE_DOWNLOADING);
|
|
}
|
|
|
|
/* When switching to the operational firmware the device
|
|
* sends a vendor specific event indicating that the bootup
|
|
* completed.
|
|
*/
|
|
} else if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 &&
|
|
skb->data[2] == 0x02) {
|
|
if (test_and_clear_bit(STATE_BOOTING, &intel->flags)) {
|
|
smp_mb__after_atomic();
|
|
wake_up_bit(&intel->flags, STATE_BOOTING);
|
|
}
|
|
}
|
|
recv:
|
|
return hci_recv_frame(hdev, skb);
|
|
}
|
|
|
|
static void intel_recv_lpm_notify(struct hci_dev *hdev, int value)
|
|
{
|
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
|
struct intel_data *intel = hu->priv;
|
|
|
|
bt_dev_dbg(hdev, "TX idle notification (%d)", value);
|
|
|
|
if (value) {
|
|
set_bit(STATE_TX_ACTIVE, &intel->flags);
|
|
schedule_work(&intel->busy_work);
|
|
} else {
|
|
clear_bit(STATE_TX_ACTIVE, &intel->flags);
|
|
}
|
|
}
|
|
|
|
static int intel_recv_lpm(struct hci_dev *hdev, struct sk_buff *skb)
|
|
{
|
|
struct hci_lpm_pkt *lpm = (void *)skb->data;
|
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
|
struct intel_data *intel = hu->priv;
|
|
|
|
switch (lpm->opcode) {
|
|
case LPM_OP_TX_NOTIFY:
|
|
if (lpm->dlen < 1) {
|
|
bt_dev_err(hu->hdev, "Invalid LPM notification packet");
|
|
break;
|
|
}
|
|
intel_recv_lpm_notify(hdev, lpm->data[0]);
|
|
break;
|
|
case LPM_OP_SUSPEND_ACK:
|
|
set_bit(STATE_SUSPENDED, &intel->flags);
|
|
if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) {
|
|
smp_mb__after_atomic();
|
|
wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION);
|
|
}
|
|
break;
|
|
case LPM_OP_RESUME_ACK:
|
|
clear_bit(STATE_SUSPENDED, &intel->flags);
|
|
if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) {
|
|
smp_mb__after_atomic();
|
|
wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION);
|
|
}
|
|
break;
|
|
default:
|
|
bt_dev_err(hdev, "Unknown LPM opcode (%02x)", lpm->opcode);
|
|
break;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define INTEL_RECV_LPM \
|
|
.type = HCI_LPM_PKT, \
|
|
.hlen = HCI_LPM_HDR_SIZE, \
|
|
.loff = 1, \
|
|
.lsize = 1, \
|
|
.maxlen = HCI_LPM_MAX_SIZE
|
|
|
|
static const struct h4_recv_pkt intel_recv_pkts[] = {
|
|
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
|
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
|
{ H4_RECV_EVENT, .recv = intel_recv_event },
|
|
{ INTEL_RECV_LPM, .recv = intel_recv_lpm },
|
|
};
|
|
|
|
static int intel_recv(struct hci_uart *hu, const void *data, int count)
|
|
{
|
|
struct intel_data *intel = hu->priv;
|
|
|
|
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
|
return -EUNATCH;
|
|
|
|
intel->rx_skb = h4_recv_buf(hu->hdev, intel->rx_skb, data, count,
|
|
intel_recv_pkts,
|
|
ARRAY_SIZE(intel_recv_pkts));
|
|
if (IS_ERR(intel->rx_skb)) {
|
|
int err = PTR_ERR(intel->rx_skb);
|
|
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
|
|
intel->rx_skb = NULL;
|
|
return err;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
|
{
|
|
struct intel_data *intel = hu->priv;
|
|
struct list_head *p;
|
|
|
|
BT_DBG("hu %p skb %p", hu, skb);
|
|
|
|
/* Be sure our controller is resumed and potential LPM transaction
|
|
* completed before enqueuing any packet.
|
|
*/
|
|
mutex_lock(&intel_device_list_lock);
|
|
list_for_each(p, &intel_device_list) {
|
|
struct intel_device *idev = list_entry(p, struct intel_device,
|
|
list);
|
|
|
|
if (hu->tty->dev->parent == idev->pdev->dev.parent) {
|
|
pm_runtime_get_sync(&idev->pdev->dev);
|
|
pm_runtime_mark_last_busy(&idev->pdev->dev);
|
|
pm_runtime_put_autosuspend(&idev->pdev->dev);
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&intel_device_list_lock);
|
|
|
|
skb_queue_tail(&intel->txq, skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sk_buff *intel_dequeue(struct hci_uart *hu)
|
|
{
|
|
struct intel_data *intel = hu->priv;
|
|
struct sk_buff *skb;
|
|
|
|
skb = skb_dequeue(&intel->txq);
|
|
if (!skb)
|
|
return skb;
|
|
|
|
if (test_bit(STATE_BOOTLOADER, &intel->flags) &&
|
|
(hci_skb_pkt_type(skb) == HCI_COMMAND_PKT)) {
|
|
struct hci_command_hdr *cmd = (void *)skb->data;
|
|
__u16 opcode = le16_to_cpu(cmd->opcode);
|
|
|
|
/* When the 0xfc01 command is issued to boot into
|
|
* the operational firmware, it will actually not
|
|
* send a command complete event. To keep the flow
|
|
* control working inject that event here.
|
|
*/
|
|
if (opcode == 0xfc01)
|
|
inject_cmd_complete(hu->hdev, opcode);
|
|
}
|
|
|
|
/* Prepend skb with frame type */
|
|
memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static const struct hci_uart_proto intel_proto = {
|
|
.id = HCI_UART_INTEL,
|
|
.name = "Intel",
|
|
.manufacturer = 2,
|
|
.init_speed = 115200,
|
|
.oper_speed = 3000000,
|
|
.open = intel_open,
|
|
.close = intel_close,
|
|
.flush = intel_flush,
|
|
.setup = intel_setup,
|
|
.set_baudrate = intel_set_baudrate,
|
|
.recv = intel_recv,
|
|
.enqueue = intel_enqueue,
|
|
.dequeue = intel_dequeue,
|
|
};
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id intel_acpi_match[] = {
|
|
{ "INT33E1", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, intel_acpi_match);
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM
|
|
static int intel_suspend_device(struct device *dev)
|
|
{
|
|
struct intel_device *idev = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&idev->hu_lock);
|
|
if (idev->hu)
|
|
intel_lpm_suspend(idev->hu);
|
|
mutex_unlock(&idev->hu_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_resume_device(struct device *dev)
|
|
{
|
|
struct intel_device *idev = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&idev->hu_lock);
|
|
if (idev->hu)
|
|
intel_lpm_resume(idev->hu);
|
|
mutex_unlock(&idev->hu_lock);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int intel_suspend(struct device *dev)
|
|
{
|
|
struct intel_device *idev = dev_get_drvdata(dev);
|
|
|
|
if (device_may_wakeup(dev))
|
|
enable_irq_wake(idev->irq);
|
|
|
|
return intel_suspend_device(dev);
|
|
}
|
|
|
|
static int intel_resume(struct device *dev)
|
|
{
|
|
struct intel_device *idev = dev_get_drvdata(dev);
|
|
|
|
if (device_may_wakeup(dev))
|
|
disable_irq_wake(idev->irq);
|
|
|
|
return intel_resume_device(dev);
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops intel_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume)
|
|
SET_RUNTIME_PM_OPS(intel_suspend_device, intel_resume_device, NULL)
|
|
};
|
|
|
|
static int intel_probe(struct platform_device *pdev)
|
|
{
|
|
struct intel_device *idev;
|
|
|
|
idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL);
|
|
if (!idev)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&idev->hu_lock);
|
|
|
|
idev->pdev = pdev;
|
|
|
|
idev->reset = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
|
|
if (IS_ERR(idev->reset)) {
|
|
dev_err(&pdev->dev, "Unable to retrieve gpio\n");
|
|
return PTR_ERR(idev->reset);
|
|
}
|
|
|
|
idev->irq = platform_get_irq(pdev, 0);
|
|
if (idev->irq < 0) {
|
|
struct gpio_desc *host_wake;
|
|
|
|
dev_err(&pdev->dev, "No IRQ, falling back to gpio-irq\n");
|
|
|
|
host_wake = devm_gpiod_get(&pdev->dev, "host-wake", GPIOD_IN);
|
|
if (IS_ERR(host_wake)) {
|
|
dev_err(&pdev->dev, "Unable to retrieve IRQ\n");
|
|
goto no_irq;
|
|
}
|
|
|
|
idev->irq = gpiod_to_irq(host_wake);
|
|
if (idev->irq < 0) {
|
|
dev_err(&pdev->dev, "No corresponding irq for gpio\n");
|
|
goto no_irq;
|
|
}
|
|
}
|
|
|
|
/* Only enable wake-up/irq when controller is powered */
|
|
device_set_wakeup_capable(&pdev->dev, true);
|
|
device_wakeup_disable(&pdev->dev);
|
|
|
|
no_irq:
|
|
platform_set_drvdata(pdev, idev);
|
|
|
|
/* Place this instance on the device list */
|
|
mutex_lock(&intel_device_list_lock);
|
|
list_add_tail(&idev->list, &intel_device_list);
|
|
mutex_unlock(&intel_device_list_lock);
|
|
|
|
dev_info(&pdev->dev, "registered, gpio(%d)/irq(%d).\n",
|
|
desc_to_gpio(idev->reset), idev->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_remove(struct platform_device *pdev)
|
|
{
|
|
struct intel_device *idev = platform_get_drvdata(pdev);
|
|
|
|
device_wakeup_disable(&pdev->dev);
|
|
|
|
mutex_lock(&intel_device_list_lock);
|
|
list_del(&idev->list);
|
|
mutex_unlock(&intel_device_list_lock);
|
|
|
|
dev_info(&pdev->dev, "unregistered.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver intel_driver = {
|
|
.probe = intel_probe,
|
|
.remove = intel_remove,
|
|
.driver = {
|
|
.name = "hci_intel",
|
|
.acpi_match_table = ACPI_PTR(intel_acpi_match),
|
|
.pm = &intel_pm_ops,
|
|
},
|
|
};
|
|
|
|
int __init intel_init(void)
|
|
{
|
|
platform_driver_register(&intel_driver);
|
|
|
|
return hci_uart_register_proto(&intel_proto);
|
|
}
|
|
|
|
int __exit intel_deinit(void)
|
|
{
|
|
platform_driver_unregister(&intel_driver);
|
|
|
|
return hci_uart_unregister_proto(&intel_proto);
|
|
}
|