2015-04-05 01:13:03 +02:00
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/*
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*
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* Bluetooth HCI UART driver for Broadcom 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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2015-05-28 11:25:01 +02:00
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#include <linux/firmware.h>
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2015-08-11 16:35:35 +02:00
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/gpio/consumer.h>
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#include <linux/tty.h>
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2015-09-04 15:35:44 +02:00
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#include <linux/interrupt.h>
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2015-09-23 18:18:08 +02:00
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#include <linux/dmi.h>
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2015-09-23 18:18:11 +02:00
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#include <linux/pm_runtime.h>
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2015-04-05 01:13:03 +02:00
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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2015-04-06 07:52:18 +02:00
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#include "btbcm.h"
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2015-04-05 01:13:03 +02:00
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#include "hci_uart.h"
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2015-04-06 07:52:18 +02:00
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2015-10-07 19:12:54 +02:00
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#define BCM_LM_DIAG_PKT 0x07
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#define BCM_LM_DIAG_SIZE 63
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2015-09-23 18:18:11 +02:00
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#define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
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2015-08-11 16:35:35 +02:00
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struct bcm_device {
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struct list_head list;
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struct platform_device *pdev;
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const char *name;
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struct gpio_desc *device_wakeup;
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struct gpio_desc *shutdown;
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struct clk *clk;
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bool clk_enabled;
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2015-08-11 16:35:37 +02:00
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u32 init_speed;
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2015-09-04 15:35:44 +02:00
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int irq;
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u8 irq_polarity;
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2015-08-11 16:35:38 +02:00
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2015-09-23 18:18:09 +02:00
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#ifdef CONFIG_PM
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2015-08-11 16:35:38 +02:00
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struct hci_uart *hu;
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bool is_suspended; /* suspend/resume flag */
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#endif
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2015-08-11 16:35:35 +02:00
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};
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2015-04-06 07:52:18 +02:00
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struct bcm_data {
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2015-08-11 16:35:35 +02:00
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struct sk_buff *rx_skb;
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struct sk_buff_head txq;
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struct bcm_device *dev;
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2015-04-06 07:52:18 +02:00
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};
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2015-08-11 16:35:35 +02:00
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/* List of BCM BT UART devices */
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2015-09-01 12:13:35 +02:00
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static DEFINE_MUTEX(bcm_device_lock);
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2015-08-11 16:35:35 +02:00
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static LIST_HEAD(bcm_device_list);
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2015-06-09 16:15:37 +02:00
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static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
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{
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struct hci_dev *hdev = hu->hdev;
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struct sk_buff *skb;
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struct bcm_update_uart_baud_rate param;
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if (speed > 3000000) {
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struct bcm_write_uart_clock_setting clock;
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clock.type = BCM_UART_CLOCK_48MHZ;
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2015-09-01 12:13:36 +02:00
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bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
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2015-06-09 16:15:37 +02:00
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/* This Broadcom specific command changes the UART's controller
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* clock for baud rate > 3000000.
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*/
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skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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int err = PTR_ERR(skb);
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2015-09-01 12:13:36 +02:00
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bt_dev_err(hdev, "BCM: failed to write clock (%d)",
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err);
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2015-06-09 16:15:37 +02:00
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return err;
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}
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kfree_skb(skb);
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}
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2015-09-01 12:13:36 +02:00
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bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
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2015-06-09 16:15:37 +02:00
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param.zero = cpu_to_le16(0);
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param.baud_rate = cpu_to_le32(speed);
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/* This Broadcom specific command changes the UART's controller baud
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* rate.
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*/
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skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m,
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HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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int err = PTR_ERR(skb);
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2015-09-01 12:13:36 +02:00
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bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
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err);
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2015-06-09 16:15:37 +02:00
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return err;
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}
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kfree_skb(skb);
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return 0;
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}
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2015-08-28 15:44:00 +02:00
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/* bcm_device_exists should be protected by bcm_device_lock */
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2015-08-11 16:35:35 +02:00
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static bool bcm_device_exists(struct bcm_device *device)
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{
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struct list_head *p;
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list_for_each(p, &bcm_device_list) {
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struct bcm_device *dev = list_entry(p, struct bcm_device, list);
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if (device == dev)
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return true;
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}
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return false;
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}
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static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
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{
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if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
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clk_enable(dev->clk);
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2015-08-17 16:00:21 +02:00
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gpiod_set_value(dev->shutdown, powered);
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gpiod_set_value(dev->device_wakeup, powered);
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2015-08-11 16:35:35 +02:00
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if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
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clk_disable(dev->clk);
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dev->clk_enabled = powered;
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return 0;
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}
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2015-09-23 18:18:09 +02:00
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#ifdef CONFIG_PM
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2015-09-04 15:35:44 +02:00
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static irqreturn_t bcm_host_wake(int irq, void *data)
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{
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struct bcm_device *bdev = data;
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bt_dev_dbg(bdev, "Host wake IRQ");
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2015-09-23 18:18:11 +02:00
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pm_runtime_get(&bdev->pdev->dev);
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pm_runtime_mark_last_busy(&bdev->pdev->dev);
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pm_runtime_put_autosuspend(&bdev->pdev->dev);
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2015-09-04 15:35:44 +02:00
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return IRQ_HANDLED;
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}
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static int bcm_request_irq(struct bcm_data *bcm)
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{
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struct bcm_device *bdev = bcm->dev;
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int err = 0;
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/* If this is not a platform device, do not enable PM functionalities */
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mutex_lock(&bcm_device_lock);
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if (!bcm_device_exists(bdev)) {
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err = -ENODEV;
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goto unlock;
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}
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if (bdev->irq > 0) {
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err = devm_request_irq(&bdev->pdev->dev, bdev->irq,
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bcm_host_wake, IRQF_TRIGGER_RISING,
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"host_wake", bdev);
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if (err)
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goto unlock;
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device_init_wakeup(&bdev->pdev->dev, true);
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2015-09-23 18:18:11 +02:00
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pm_runtime_set_autosuspend_delay(&bdev->pdev->dev,
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BCM_AUTOSUSPEND_DELAY);
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pm_runtime_use_autosuspend(&bdev->pdev->dev);
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pm_runtime_set_active(&bdev->pdev->dev);
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pm_runtime_enable(&bdev->pdev->dev);
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2015-09-04 15:35:44 +02:00
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}
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unlock:
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mutex_unlock(&bcm_device_lock);
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return err;
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}
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static const struct bcm_set_sleep_mode default_sleep_params = {
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.sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
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.idle_host = 2, /* idle threshold HOST, in 300ms */
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.idle_dev = 2, /* idle threshold device, in 300ms */
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.bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
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.host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
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.allow_host_sleep = 1, /* Allow host sleep in SCO flag */
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2015-09-23 18:18:11 +02:00
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.combine_modes = 1, /* Combine sleep and LPM flag */
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2015-09-04 15:35:44 +02:00
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.tristate_control = 0, /* Allow tri-state control of UART tx flag */
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/* Irrelevant USB flags */
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.usb_auto_sleep = 0,
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.usb_resume_timeout = 0,
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.pulsed_host_wake = 0,
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.break_to_host = 0
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};
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static int bcm_setup_sleep(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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struct sk_buff *skb;
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struct bcm_set_sleep_mode sleep_params = default_sleep_params;
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sleep_params.host_wake_active = !bcm->dev->irq_polarity;
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skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
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&sleep_params, HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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int err = PTR_ERR(skb);
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bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
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return err;
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}
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kfree_skb(skb);
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bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
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return 0;
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}
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#else
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static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
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static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
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#endif
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2015-10-07 20:08:26 +02:00
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static int bcm_set_diag(struct hci_dev *hdev, bool enable)
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{
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struct hci_uart *hu = hci_get_drvdata(hdev);
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struct bcm_data *bcm = hu->priv;
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struct sk_buff *skb;
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -ENETDOWN;
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skb = bt_skb_alloc(3, GFP_KERNEL);
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if (IS_ERR(skb))
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return PTR_ERR(skb);
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*skb_put(skb, 1) = BCM_LM_DIAG_PKT;
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*skb_put(skb, 1) = 0xf0;
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*skb_put(skb, 1) = enable;
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skb_queue_tail(&bcm->txq, skb);
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hci_uart_tx_wakeup(hu);
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return 0;
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}
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2015-04-06 07:52:18 +02:00
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static int bcm_open(struct hci_uart *hu)
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{
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struct bcm_data *bcm;
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2015-08-11 16:35:35 +02:00
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struct list_head *p;
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2015-04-06 07:52:18 +02:00
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2015-09-01 12:13:36 +02:00
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bt_dev_dbg(hu->hdev, "hu %p", hu);
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2015-04-06 07:52:18 +02:00
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bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
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if (!bcm)
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return -ENOMEM;
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skb_queue_head_init(&bcm->txq);
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hu->priv = bcm;
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2015-08-11 16:35:35 +02:00
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2015-09-01 12:13:35 +02:00
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mutex_lock(&bcm_device_lock);
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2015-08-11 16:35:35 +02:00
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list_for_each(p, &bcm_device_list) {
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struct bcm_device *dev = list_entry(p, struct bcm_device, list);
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/* Retrieve saved bcm_device based on parent of the
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* platform device (saved during device probe) and
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* parent of tty device used by hci_uart
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*/
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if (hu->tty->dev->parent == dev->pdev->dev.parent) {
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bcm->dev = dev;
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2015-08-11 16:35:37 +02:00
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hu->init_speed = dev->init_speed;
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2015-09-23 18:18:09 +02:00
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#ifdef CONFIG_PM
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2015-08-11 16:35:38 +02:00
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dev->hu = hu;
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#endif
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2015-09-04 15:35:44 +02:00
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bcm_gpio_set_power(bcm->dev, true);
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2015-08-11 16:35:35 +02:00
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break;
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}
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}
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2015-09-01 12:13:35 +02:00
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mutex_unlock(&bcm_device_lock);
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2015-08-11 16:35:35 +02:00
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2015-04-06 07:52:18 +02:00
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return 0;
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}
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static int bcm_close(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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2015-09-04 15:35:44 +02:00
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struct bcm_device *bdev = bcm->dev;
|
2015-04-06 07:52:18 +02:00
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2015-09-01 12:13:36 +02:00
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bt_dev_dbg(hu->hdev, "hu %p", hu);
|
2015-04-06 07:52:18 +02:00
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2015-08-11 16:35:35 +02:00
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/* Protect bcm->dev against removal of the device or driver */
|
2015-09-01 12:13:35 +02:00
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mutex_lock(&bcm_device_lock);
|
2015-09-04 15:35:44 +02:00
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if (bcm_device_exists(bdev)) {
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bcm_gpio_set_power(bdev, false);
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2015-09-23 18:18:09 +02:00
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#ifdef CONFIG_PM
|
2015-09-23 18:18:11 +02:00
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|
|
pm_runtime_disable(&bdev->pdev->dev);
|
|
|
|
pm_runtime_set_suspended(&bdev->pdev->dev);
|
|
|
|
|
2015-09-04 15:35:44 +02:00
|
|
|
if (device_can_wakeup(&bdev->pdev->dev)) {
|
|
|
|
devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
|
|
|
|
device_init_wakeup(&bdev->pdev->dev, false);
|
|
|
|
}
|
|
|
|
|
|
|
|
bdev->hu = NULL;
|
2015-08-11 16:35:38 +02:00
|
|
|
#endif
|
|
|
|
}
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_unlock(&bcm_device_lock);
|
2015-08-11 16:35:35 +02:00
|
|
|
|
2015-04-06 07:52:18 +02:00
|
|
|
skb_queue_purge(&bcm->txq);
|
|
|
|
kfree_skb(bcm->rx_skb);
|
|
|
|
kfree(bcm);
|
|
|
|
|
|
|
|
hu->priv = NULL;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bcm_flush(struct hci_uart *hu)
|
|
|
|
{
|
|
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_dbg(hu->hdev, "hu %p", hu);
|
2015-04-06 07:52:18 +02:00
|
|
|
|
|
|
|
skb_queue_purge(&bcm->txq);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bcm_setup(struct hci_uart *hu)
|
|
|
|
{
|
2015-09-04 15:35:44 +02:00
|
|
|
struct bcm_data *bcm = hu->priv;
|
2015-05-28 11:25:05 +02:00
|
|
|
char fw_name[64];
|
|
|
|
const struct firmware *fw;
|
2015-06-18 12:43:27 +02:00
|
|
|
unsigned int speed;
|
2015-05-28 11:25:05 +02:00
|
|
|
int err;
|
|
|
|
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_dbg(hu->hdev, "hu %p", hu);
|
2015-04-06 07:52:18 +02:00
|
|
|
|
2015-10-07 20:08:26 +02:00
|
|
|
hu->hdev->set_diag = bcm_set_diag;
|
2015-04-06 07:52:18 +02:00
|
|
|
hu->hdev->set_bdaddr = btbcm_set_bdaddr;
|
|
|
|
|
2015-05-28 11:25:05 +02:00
|
|
|
err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name));
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
err = request_firmware(&fw, fw_name, &hu->hdev->dev);
|
|
|
|
if (err < 0) {
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
|
2015-05-28 11:25:05 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = btbcm_patchram(hu->hdev, fw);
|
|
|
|
if (err) {
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
|
2015-05-28 11:25:05 +02:00
|
|
|
goto finalize;
|
|
|
|
}
|
|
|
|
|
2015-06-18 12:43:27 +02:00
|
|
|
/* Init speed if any */
|
|
|
|
if (hu->init_speed)
|
|
|
|
speed = hu->init_speed;
|
|
|
|
else if (hu->proto->init_speed)
|
|
|
|
speed = hu->proto->init_speed;
|
|
|
|
else
|
|
|
|
speed = 0;
|
|
|
|
|
|
|
|
if (speed)
|
|
|
|
hci_uart_set_baudrate(hu, speed);
|
|
|
|
|
|
|
|
/* Operational speed if any */
|
|
|
|
if (hu->oper_speed)
|
|
|
|
speed = hu->oper_speed;
|
|
|
|
else if (hu->proto->oper_speed)
|
|
|
|
speed = hu->proto->oper_speed;
|
|
|
|
else
|
|
|
|
speed = 0;
|
|
|
|
|
|
|
|
if (speed) {
|
|
|
|
err = bcm_set_baudrate(hu, speed);
|
2015-06-09 16:15:37 +02:00
|
|
|
if (!err)
|
2015-06-18 12:43:27 +02:00
|
|
|
hci_uart_set_baudrate(hu, speed);
|
2015-06-09 16:15:37 +02:00
|
|
|
}
|
|
|
|
|
2015-05-28 11:25:05 +02:00
|
|
|
finalize:
|
|
|
|
release_firmware(fw);
|
|
|
|
|
|
|
|
err = btbcm_finalize(hu->hdev);
|
2015-09-04 15:35:44 +02:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
err = bcm_request_irq(bcm);
|
|
|
|
if (!err)
|
|
|
|
err = bcm_setup_sleep(hu);
|
2015-05-28 11:25:05 +02:00
|
|
|
|
|
|
|
return err;
|
2015-04-06 07:52:18 +02:00
|
|
|
}
|
|
|
|
|
2015-10-07 19:12:54 +02:00
|
|
|
#define BCM_RECV_LM_DIAG \
|
|
|
|
.type = BCM_LM_DIAG_PKT, \
|
|
|
|
.hlen = BCM_LM_DIAG_SIZE, \
|
|
|
|
.loff = 0, \
|
|
|
|
.lsize = 0, \
|
|
|
|
.maxlen = BCM_LM_DIAG_SIZE
|
|
|
|
|
2015-04-06 08:44:59 +02:00
|
|
|
static const struct h4_recv_pkt bcm_recv_pkts[] = {
|
2015-10-07 19:12:54 +02:00
|
|
|
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
|
|
|
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
|
|
|
{ H4_RECV_EVENT, .recv = hci_recv_frame },
|
|
|
|
{ BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
|
2015-04-06 08:44:59 +02:00
|
|
|
};
|
|
|
|
|
2015-04-06 07:52:18 +02:00
|
|
|
static int bcm_recv(struct hci_uart *hu, const void *data, int count)
|
|
|
|
{
|
|
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
|
|
|
|
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
|
|
|
return -EUNATCH;
|
|
|
|
|
2015-04-06 08:44:59 +02:00
|
|
|
bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
|
|
|
|
bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
|
2015-04-06 07:52:18 +02:00
|
|
|
if (IS_ERR(bcm->rx_skb)) {
|
|
|
|
int err = PTR_ERR(bcm->rx_skb);
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
|
2015-06-17 14:10:39 +02:00
|
|
|
bcm->rx_skb = NULL;
|
2015-04-06 07:52:18 +02:00
|
|
|
return err;
|
2015-09-23 18:18:11 +02:00
|
|
|
} else if (!bcm->rx_skb) {
|
|
|
|
/* Delay auto-suspend when receiving completed packet */
|
|
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
if (bcm->dev && bcm_device_exists(bcm->dev)) {
|
|
|
|
pm_runtime_get(&bcm->dev->pdev->dev);
|
|
|
|
pm_runtime_mark_last_busy(&bcm->dev->pdev->dev);
|
|
|
|
pm_runtime_put_autosuspend(&bcm->dev->pdev->dev);
|
|
|
|
}
|
|
|
|
mutex_unlock(&bcm_device_lock);
|
2015-04-06 07:52:18 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
|
2015-04-06 07:52:18 +02:00
|
|
|
|
|
|
|
/* Prepend skb with frame type */
|
|
|
|
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
|
|
|
|
skb_queue_tail(&bcm->txq, skb);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
|
|
|
|
{
|
|
|
|
struct bcm_data *bcm = hu->priv;
|
2015-09-23 18:18:11 +02:00
|
|
|
struct sk_buff *skb = NULL;
|
|
|
|
struct bcm_device *bdev = NULL;
|
|
|
|
|
|
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
|
|
|
|
if (bcm_device_exists(bcm->dev)) {
|
|
|
|
bdev = bcm->dev;
|
|
|
|
pm_runtime_get_sync(&bdev->pdev->dev);
|
|
|
|
/* Shall be resumed here */
|
|
|
|
}
|
|
|
|
|
|
|
|
skb = skb_dequeue(&bcm->txq);
|
|
|
|
|
|
|
|
if (bdev) {
|
|
|
|
pm_runtime_mark_last_busy(&bdev->pdev->dev);
|
|
|
|
pm_runtime_put_autosuspend(&bdev->pdev->dev);
|
|
|
|
}
|
2015-04-06 07:52:18 +02:00
|
|
|
|
2015-09-23 18:18:11 +02:00
|
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
|
|
|
|
return skb;
|
2015-04-06 07:52:18 +02:00
|
|
|
}
|
|
|
|
|
2015-09-23 18:18:09 +02:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int bcm_suspend_device(struct device *dev)
|
2015-08-11 16:35:38 +02:00
|
|
|
{
|
|
|
|
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
|
|
|
|
|
2015-09-23 18:18:09 +02:00
|
|
|
bt_dev_dbg(bdev, "");
|
2015-08-28 15:44:00 +02:00
|
|
|
|
2015-09-23 18:18:09 +02:00
|
|
|
if (!bdev->is_suspended && bdev->hu) {
|
2015-08-11 16:35:38 +02:00
|
|
|
hci_uart_set_flow_control(bdev->hu, true);
|
|
|
|
|
2015-09-23 18:18:09 +02:00
|
|
|
/* Once this returns, driver suspends BT via GPIO */
|
2015-08-11 16:35:38 +02:00
|
|
|
bdev->is_suspended = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Suspend the device */
|
|
|
|
if (bdev->device_wakeup) {
|
|
|
|
gpiod_set_value(bdev->device_wakeup, false);
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_dbg(bdev, "suspend, delaying 15 ms");
|
2015-08-11 16:35:38 +02:00
|
|
|
mdelay(15);
|
|
|
|
}
|
|
|
|
|
2015-09-23 18:18:09 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bcm_resume_device(struct device *dev)
|
|
|
|
{
|
|
|
|
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
|
|
|
|
|
|
|
|
bt_dev_dbg(bdev, "");
|
|
|
|
|
|
|
|
if (bdev->device_wakeup) {
|
|
|
|
gpiod_set_value(bdev->device_wakeup, true);
|
|
|
|
bt_dev_dbg(bdev, "resume, delaying 15 ms");
|
|
|
|
mdelay(15);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* When this executes, the device has woken up already */
|
|
|
|
if (bdev->is_suspended && bdev->hu) {
|
|
|
|
bdev->is_suspended = false;
|
|
|
|
|
|
|
|
hci_uart_set_flow_control(bdev->hu, false);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
/* Platform suspend callback */
|
|
|
|
static int bcm_suspend(struct device *dev)
|
|
|
|
{
|
|
|
|
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
|
|
|
|
int error;
|
|
|
|
|
|
|
|
bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
|
|
|
|
|
|
|
|
/* bcm_suspend can be called at any time as long as platform device is
|
|
|
|
* bound, so it should use bcm_device_lock to protect access to hci_uart
|
|
|
|
* and device_wake-up GPIO.
|
|
|
|
*/
|
|
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
|
|
|
|
if (!bdev->hu)
|
|
|
|
goto unlock;
|
|
|
|
|
2015-09-23 18:18:11 +02:00
|
|
|
if (pm_runtime_active(dev))
|
|
|
|
bcm_suspend_device(dev);
|
2015-09-23 18:18:09 +02:00
|
|
|
|
2015-09-04 15:35:44 +02:00
|
|
|
if (device_may_wakeup(&bdev->pdev->dev)) {
|
|
|
|
error = enable_irq_wake(bdev->irq);
|
|
|
|
if (!error)
|
|
|
|
bt_dev_dbg(bdev, "BCM irq: enabled");
|
|
|
|
}
|
|
|
|
|
2015-08-28 15:44:00 +02:00
|
|
|
unlock:
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_unlock(&bcm_device_lock);
|
2015-08-28 15:44:00 +02:00
|
|
|
|
2015-08-11 16:35:38 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Platform resume callback */
|
|
|
|
static int bcm_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
|
|
|
|
|
2015-09-01 12:13:36 +02:00
|
|
|
bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
|
2015-08-11 16:35:38 +02:00
|
|
|
|
2015-09-23 18:18:09 +02:00
|
|
|
/* bcm_resume can be called at any time as long as platform device is
|
|
|
|
* bound, so it should use bcm_device_lock to protect access to hci_uart
|
|
|
|
* and device_wake-up GPIO.
|
|
|
|
*/
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_lock(&bcm_device_lock);
|
2015-08-28 15:44:00 +02:00
|
|
|
|
|
|
|
if (!bdev->hu)
|
|
|
|
goto unlock;
|
|
|
|
|
2015-09-04 15:35:44 +02:00
|
|
|
if (device_may_wakeup(&bdev->pdev->dev)) {
|
|
|
|
disable_irq_wake(bdev->irq);
|
|
|
|
bt_dev_dbg(bdev, "BCM irq: disabled");
|
|
|
|
}
|
|
|
|
|
2015-09-23 18:18:09 +02:00
|
|
|
bcm_resume_device(dev);
|
2015-08-11 16:35:38 +02:00
|
|
|
|
2015-08-28 15:44:00 +02:00
|
|
|
unlock:
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_unlock(&bcm_device_lock);
|
2015-08-28 15:44:00 +02:00
|
|
|
|
2015-09-23 18:18:11 +02:00
|
|
|
pm_runtime_disable(dev);
|
|
|
|
pm_runtime_set_active(dev);
|
|
|
|
pm_runtime_enable(dev);
|
|
|
|
|
2015-08-11 16:35:38 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2015-08-11 16:35:35 +02:00
|
|
|
static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false };
|
|
|
|
static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
|
2015-09-04 15:35:44 +02:00
|
|
|
static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false };
|
2015-08-11 16:35:35 +02:00
|
|
|
|
|
|
|
static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
|
|
|
|
{ "device-wakeup-gpios", &device_wakeup_gpios, 1 },
|
|
|
|
{ "shutdown-gpios", &shutdown_gpios, 1 },
|
2015-09-04 15:35:44 +02:00
|
|
|
{ "host-wakeup-gpios", &host_wakeup_gpios, 1 },
|
2015-08-11 16:35:35 +02:00
|
|
|
{ },
|
|
|
|
};
|
|
|
|
|
2015-08-12 12:46:01 +02:00
|
|
|
#ifdef CONFIG_ACPI
|
2015-09-23 18:18:08 +02:00
|
|
|
static u8 acpi_active_low = ACPI_ACTIVE_LOW;
|
|
|
|
|
|
|
|
/* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
|
|
|
|
static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = {
|
|
|
|
{
|
|
|
|
.ident = "Asus T100TA",
|
|
|
|
.matches = {
|
|
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR,
|
|
|
|
"ASUSTeK COMPUTER INC."),
|
|
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
|
|
|
|
},
|
|
|
|
.driver_data = &acpi_active_low,
|
|
|
|
},
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
|
2015-08-11 16:35:37 +02:00
|
|
|
static int bcm_resource(struct acpi_resource *ares, void *data)
|
|
|
|
{
|
|
|
|
struct bcm_device *dev = data;
|
2015-09-04 15:35:44 +02:00
|
|
|
struct acpi_resource_extended_irq *irq;
|
|
|
|
struct acpi_resource_gpio *gpio;
|
|
|
|
struct acpi_resource_uart_serialbus *sb;
|
|
|
|
|
|
|
|
switch (ares->type) {
|
|
|
|
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
|
|
|
|
irq = &ares->data.extended_irq;
|
|
|
|
dev->irq_polarity = irq->polarity;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_RESOURCE_TYPE_GPIO:
|
|
|
|
gpio = &ares->data.gpio;
|
|
|
|
if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
|
|
|
|
dev->irq_polarity = gpio->polarity;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
|
2015-08-11 16:35:37 +02:00
|
|
|
sb = &ares->data.uart_serial_bus;
|
|
|
|
if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
|
|
|
|
dev->init_speed = sb->default_baud_rate;
|
2015-09-04 15:35:44 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
break;
|
2015-08-11 16:35:37 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Always tell the ACPI core to skip this resource */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2015-08-11 16:35:35 +02:00
|
|
|
static int bcm_acpi_probe(struct bcm_device *dev)
|
|
|
|
{
|
|
|
|
struct platform_device *pdev = dev->pdev;
|
2015-08-11 16:35:37 +02:00
|
|
|
LIST_HEAD(resources);
|
2015-09-23 18:18:08 +02:00
|
|
|
const struct dmi_system_id *dmi_id;
|
2015-08-11 16:35:35 +02:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Retrieve GPIO data */
|
|
|
|
dev->name = dev_name(&pdev->dev);
|
|
|
|
ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
|
|
|
|
acpi_bcm_default_gpios);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
dev->clk = devm_clk_get(&pdev->dev, NULL);
|
|
|
|
|
2015-08-12 09:20:56 +02:00
|
|
|
dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev,
|
|
|
|
"device-wakeup",
|
|
|
|
GPIOD_OUT_LOW);
|
|
|
|
if (IS_ERR(dev->device_wakeup))
|
|
|
|
return PTR_ERR(dev->device_wakeup);
|
2015-08-11 16:35:35 +02:00
|
|
|
|
2015-08-12 09:20:56 +02:00
|
|
|
dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown",
|
|
|
|
GPIOD_OUT_LOW);
|
|
|
|
if (IS_ERR(dev->shutdown))
|
|
|
|
return PTR_ERR(dev->shutdown);
|
2015-08-11 16:35:35 +02:00
|
|
|
|
2015-09-04 15:35:44 +02:00
|
|
|
/* IRQ can be declared in ACPI table as Interrupt or GpioInt */
|
|
|
|
dev->irq = platform_get_irq(pdev, 0);
|
|
|
|
if (dev->irq <= 0) {
|
|
|
|
struct gpio_desc *gpio;
|
|
|
|
|
|
|
|
gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup",
|
|
|
|
GPIOD_IN);
|
|
|
|
if (IS_ERR(gpio))
|
|
|
|
return PTR_ERR(gpio);
|
|
|
|
|
|
|
|
dev->irq = gpiod_to_irq(gpio);
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq);
|
|
|
|
|
2015-08-11 16:35:35 +02:00
|
|
|
/* Make sure at-least one of the GPIO is defined and that
|
|
|
|
* a name is specified for this instance
|
|
|
|
*/
|
|
|
|
if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) {
|
|
|
|
dev_err(&pdev->dev, "invalid platform data\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2015-08-11 16:35:37 +02:00
|
|
|
/* Retrieve UART ACPI info */
|
2015-09-30 15:26:45 +02:00
|
|
|
ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev),
|
|
|
|
&resources, bcm_resource, dev);
|
2015-09-30 15:26:42 +02:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2015-09-30 15:26:41 +02:00
|
|
|
acpi_dev_free_resource_list(&resources);
|
2015-08-11 16:35:37 +02:00
|
|
|
|
2015-09-23 18:18:08 +02:00
|
|
|
dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table);
|
|
|
|
if (dmi_id) {
|
|
|
|
bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low",
|
|
|
|
dmi_id->ident);
|
|
|
|
dev->irq_polarity = *(u8 *)dmi_id->driver_data;
|
|
|
|
}
|
|
|
|
|
2015-08-11 16:35:35 +02:00
|
|
|
return 0;
|
|
|
|
}
|
2015-08-12 12:46:01 +02:00
|
|
|
#else
|
|
|
|
static int bcm_acpi_probe(struct bcm_device *dev)
|
|
|
|
{
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_ACPI */
|
2015-08-11 16:35:35 +02:00
|
|
|
|
|
|
|
static int bcm_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct bcm_device *dev;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
|
|
|
|
if (!dev)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
dev->pdev = pdev;
|
|
|
|
|
2015-09-30 15:26:44 +02:00
|
|
|
ret = bcm_acpi_probe(dev);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2015-08-11 16:35:35 +02:00
|
|
|
|
|
|
|
platform_set_drvdata(pdev, dev);
|
|
|
|
|
|
|
|
dev_info(&pdev->dev, "%s device registered.\n", dev->name);
|
|
|
|
|
|
|
|
/* Place this instance on the device list */
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_lock(&bcm_device_lock);
|
2015-08-11 16:35:35 +02:00
|
|
|
list_add_tail(&dev->list, &bcm_device_list);
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_unlock(&bcm_device_lock);
|
2015-08-11 16:35:35 +02:00
|
|
|
|
|
|
|
bcm_gpio_set_power(dev, false);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bcm_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct bcm_device *dev = platform_get_drvdata(pdev);
|
|
|
|
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_lock(&bcm_device_lock);
|
2015-08-11 16:35:35 +02:00
|
|
|
list_del(&dev->list);
|
2015-09-01 12:13:35 +02:00
|
|
|
mutex_unlock(&bcm_device_lock);
|
2015-08-11 16:35:35 +02:00
|
|
|
|
|
|
|
acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev));
|
|
|
|
|
|
|
|
dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-04-06 07:52:18 +02:00
|
|
|
static const struct hci_uart_proto bcm_proto = {
|
|
|
|
.id = HCI_UART_BCM,
|
|
|
|
.name = "BCM",
|
2015-10-20 21:30:45 +02:00
|
|
|
.manufacturer = 15,
|
2015-06-09 16:15:37 +02:00
|
|
|
.init_speed = 115200,
|
|
|
|
.oper_speed = 4000000,
|
2015-04-06 07:52:18 +02:00
|
|
|
.open = bcm_open,
|
|
|
|
.close = bcm_close,
|
|
|
|
.flush = bcm_flush,
|
|
|
|
.setup = bcm_setup,
|
2015-06-09 16:15:37 +02:00
|
|
|
.set_baudrate = bcm_set_baudrate,
|
2015-04-06 07:52:18 +02:00
|
|
|
.recv = bcm_recv,
|
|
|
|
.enqueue = bcm_enqueue,
|
|
|
|
.dequeue = bcm_dequeue,
|
|
|
|
};
|
|
|
|
|
2015-08-11 16:35:35 +02:00
|
|
|
#ifdef CONFIG_ACPI
|
|
|
|
static const struct acpi_device_id bcm_acpi_match[] = {
|
|
|
|
{ "BCM2E39", 0 },
|
|
|
|
{ "BCM2E67", 0 },
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
|
|
|
|
#endif
|
|
|
|
|
2015-08-11 16:35:38 +02:00
|
|
|
/* Platform suspend and resume callbacks */
|
2015-09-23 18:18:11 +02:00
|
|
|
static const struct dev_pm_ops bcm_pm_ops = {
|
|
|
|
SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
|
|
|
|
SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
|
|
|
|
};
|
2015-08-11 16:35:38 +02:00
|
|
|
|
2015-08-11 16:35:35 +02:00
|
|
|
static struct platform_driver bcm_driver = {
|
|
|
|
.probe = bcm_probe,
|
|
|
|
.remove = bcm_remove,
|
|
|
|
.driver = {
|
|
|
|
.name = "hci_bcm",
|
|
|
|
.acpi_match_table = ACPI_PTR(bcm_acpi_match),
|
2015-08-11 16:35:38 +02:00
|
|
|
.pm = &bcm_pm_ops,
|
2015-08-11 16:35:35 +02:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2015-04-06 07:52:18 +02:00
|
|
|
int __init bcm_init(void)
|
|
|
|
{
|
2015-08-11 16:35:35 +02:00
|
|
|
platform_driver_register(&bcm_driver);
|
|
|
|
|
2015-04-06 07:52:18 +02:00
|
|
|
return hci_uart_register_proto(&bcm_proto);
|
|
|
|
}
|
|
|
|
|
|
|
|
int __exit bcm_deinit(void)
|
|
|
|
{
|
2015-08-11 16:35:35 +02:00
|
|
|
platform_driver_unregister(&bcm_driver);
|
|
|
|
|
2015-04-06 07:52:18 +02:00
|
|
|
return hci_uart_unregister_proto(&bcm_proto);
|
|
|
|
}
|