This code implements the Broadcom Bluetooth device driver.
It manages device configuration, firmware download and
power management.
Signed-off-by: Ilya Faenson <ifaenson@xxxxxxxxxxxx>
---
drivers/bluetooth/Kconfig | 35 +-
drivers/bluetooth/Makefile | 1 +
drivers/bluetooth/btbcm.c | 173 ++++++++-
drivers/bluetooth/btbcm.h | 19 +-
drivers/bluetooth/btbcm_uart.c | 679 +++++++++++++++++++++++++++++++++
drivers/bluetooth/btbcm_uart.h | 90 +++++
drivers/bluetooth/hci_bcm.c | 838 +++++++++++++++++++++++++++++++++++++----
7 files changed, 1745 insertions(+), 90 deletions(-)
create mode 100644 drivers/bluetooth/btbcm_uart.c
create mode 100644 drivers/bluetooth/btbcm_uart.h
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index ed5c273..1bfe36b 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -8,6 +8,12 @@ config BT_INTEL
config BT_BCM
tristate
select FW_LOADER
+ help
+ This feature is required if you want to use Broadcom Bluetooth
+ over both USB and UART.
+
+ Say Y here to compile support for Broadcom Bluetooth
+ kernel or say M to compile it as module (btusb).
config BT_HCIBTUSB
tristate "HCI USB driver"
@@ -22,15 +28,16 @@ config BT_HCIBTUSB
kernel or say M to compile it as module (btusb).
config BT_HCIBTUSB_BCM
- bool "Broadcom protocol support"
+ bool "Broadcom USB support"
depends on BT_HCIBTUSB
select BT_BCM
default y
help
- The Broadcom protocol support enables firmware and patchram
- download support for Broadcom Bluetooth controllers.
+ Broadcom Bluetooth USB driver support.
+ The Broadcom USB support enables firmware and patchram
+ download for Broadcom Bluetooth USB controllers.
- Say Y here to compile support for Broadcom protocol.
+ Say Y here to compile support for Broadcom USB.
config BT_HCIBTSDIO
tristate "HCI SDIO driver"
@@ -125,15 +132,25 @@ config BT_HCIUART_INTEL
Say Y here to compile support for Intel protocol.
config BT_HCIUART_BCM
- bool "Broadcom protocol support"
- depends on BT_HCIUART
+ bool "Broadcom BT UART serial support"
select BT_HCIUART_H4
+ select BT_UART_BCM
select BT_BCM
help
- The Broadcom protocol support enables Bluetooth HCI over serial
- port interface for Broadcom Bluetooth controllers.
+ HCI_UART_BCM is a protocol for initializing, managing and
+ communicating with Broadcom UART Bluetooth devices.
+ This protocol initializes chips and power-manages them.
+ Enable this if you have serial Broadcom Bluetooth device.
+
+ Say Y here to compile support for Broadcom UART protocol.
+
+config BT_UART_BCM
+ tristate "Broadcom BT UART driver"
+ depends on BT_HCIUART_H4 && TTY
+ help
+ This driver supports the HCI_UART_BT protocol.
- Say Y here to compile support for Broadcom protocol.
+ It manages Bluetooth UART device properties and GPIOs.
config BT_HCIBCM203X
tristate "HCI BCM203x USB driver"
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index dd0d9c4..0e5fd66 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_BT_MRVL) += btmrvl.o
obj-$(CONFIG_BT_MRVL_SDIO) += btmrvl_sdio.o
obj-$(CONFIG_BT_WILINK) += btwilink.o
obj-$(CONFIG_BT_BCM) += btbcm.o
+obj-$(CONFIG_BT_UART_BCM) += btbcm_uart.o
btmrvl-y := btmrvl_main.o
btmrvl-$(CONFIG_DEBUG_FS) += btmrvl_debugfs.o
diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
index 4bba866..3e9ac30 100644
--- a/drivers/bluetooth/btbcm.c
+++ b/drivers/bluetooth/btbcm.c
@@ -2,7 +2,8 @@
*
* Bluetooth support for Broadcom devices
*
- * Copyright (C) 2015 Intel Corporation
+ * Copyright (C) 2015 Intel Corporation
+ * Copyright (C) 2015 Broadcom Corporation
*
*
* This program is free software; you can redistribute it and/or modify
@@ -15,24 +16,22 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#include <linux/module.h>
#include <linux/firmware.h>
+#include <linux/tty.h>
#include <asm/unaligned.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
+#include "hci_uart.h"
#include "btbcm.h"
-#define VERSION "0.1"
+#define VERSION "0.2"
-#define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
+#define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00} })
int btbcm_check_bdaddr(struct hci_dev *hdev)
{
@@ -43,6 +42,7 @@ int btbcm_check_bdaddr(struct hci_dev *hdev)
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
+
BT_ERR("%s: BCM: Reading device address failed (%d)",
hdev->name, err);
return err;
@@ -159,6 +159,8 @@ int btbcm_patchram(struct hci_dev *hdev, const char *firmware)
}
/* 250 msec delay after Launch Ram completes */
+ BT_INFO("%s: BCM: Delaying upon the patch download completion...",
+ hdev->name);
msleep(250);
done:
@@ -174,6 +176,7 @@ static int btbcm_reset(struct hci_dev *hdev)
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
+
BT_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
return err;
}
@@ -246,8 +249,10 @@ static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
static const struct {
u16 subver;
const char *name;
+ u32 baud_rate; /* operational baud rate */
} bcm_uart_subver_table[] = {
- { 0x410e, "BCM43341B0" }, /* 002.001.014 */
+ { 0x410e, "BCM43341B0", 3000000}, /* 002.001.014 */
+ { 0x610c, "BCM4354_003.001.012.0306.0659", 3000000}, /* 003.001.012 */
{ }
};
@@ -268,6 +273,133 @@ static const struct {
{ }
};
+/*
+ * Set the UART into the defaults
+ */
+int btbcm_init_uart(struct hci_uart *hu)
+{
+ struct ktermios ktermios;
+ struct tty_struct *tty = hu->tty;
+ int status, speed;
+
+ /* Bring UART into default setting at 115200 */
+ if (tty->ldisc->ops->flush_buffer)
+ tty->ldisc->ops->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
+ ktermios = tty->termios;
+ BT_DBG("init_uart def flags c_o %x c_l %x c_c %x spd %d/%d",
+ ktermios.c_oflag, ktermios.c_lflag, ktermios.c_cflag,
+ ktermios.c_ispeed, ktermios.c_ospeed);
+ ktermios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP
+ | INLCR | IGNCR | ICRNL | IXON);
+ ktermios.c_oflag &= ~OPOST;
+ ktermios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
+ ktermios.c_cflag &= ~(CSIZE | PARENB | CBAUD);
+ ktermios.c_cflag |= CS8;
+ ktermios.c_cflag |= CRTSCTS;
+ ktermios.c_cflag |= B115200;
+ ktermios.c_ispeed = 115200;
+ ktermios.c_ospeed = 115200;
+ status = tty_set_termios(tty, &ktermios);
+ if (status) {
+ BT_DBG("init_uart set_termios failure %d", status);
+ return status;
+ }
+
+ speed = tty_get_baud_rate(tty);
+ BT_DBG("init_uart set_termios completed, spd %d", speed);
+ ktermios = tty->termios;
+ BT_DBG("init_uart new flags c_o %x c_l %x c_c %x spd %d/%d",
+ ktermios.c_oflag, ktermios.c_lflag, ktermios.c_cflag,
+ ktermios.c_ispeed, ktermios.c_ospeed);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_init_uart);
+
+/*
+ * Set the baud rate on the UART and the device
+ */
+int btbcm_set_baud_rate(struct hci_uart *hu, int baud_rate)
+{
+ struct ktermios ktermios;
+ struct tty_struct *tty = hu->tty;
+ int status, speed, cflag;
+ struct sk_buff *skb;
+ unsigned char enable = 1;
+ unsigned char baud_rate_vsc_pars[] = {0, 0, 0, 0x10, 0x0e, 0};
+
+ /* If the baud rate is higher than 3000000, change the clock */
+ if (baud_rate > 3000000) {
+ skb = __hci_cmd_sync(hu->hdev, 0xfc45, 1, &enable,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ status = PTR_ERR(skb);
+ return status;
+ }
+
+ kfree_skb(skb);
+ BT_DBG("set_baud_rate write UART 48 MHz VSC succeeded");
+ }
+
+ /* Now let the device know about the rate change */
+ baud_rate_vsc_pars[2] = (unsigned char)(baud_rate & 0xff);
+ baud_rate_vsc_pars[3] = (unsigned char)((baud_rate >> 8) & 0xff);
+ baud_rate_vsc_pars[4] = (unsigned char)((baud_rate >> 16) & 0xff);
+ baud_rate_vsc_pars[5] = (unsigned char)((baud_rate >> 24) & 0xff);
+ skb = __hci_cmd_sync(hu->hdev, 0xfc18, sizeof(baud_rate_vsc_pars),
+ baud_rate_vsc_pars, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ status = PTR_ERR(skb);
+ BT_ERR("set_baud_rate VSC failed (%d)", status);
+ return status;
+ }
+
+ kfree_skb(skb);
+ BT_DBG("set_baud_rate VSC succeeded");
+
+ /* Set UART into this rate as well */
+ ktermios = tty->termios;
+ BT_DBG("set_baud_rate start flags c_o %x c_l %x c_c %x spd %d/%d",
+ ktermios.c_oflag, ktermios.c_lflag, ktermios.c_cflag,
+ ktermios.c_ispeed, ktermios.c_ospeed);
+ switch (baud_rate) {
+ case 115200:
+ cflag |= B115200; break;
+ case 921600:
+ cflag |= B921600; break;
+ case 3000000:
+ cflag |= B3000000; break;
+ case 3500000:
+ cflag |= B3500000; break;
+ case 4000000:
+ cflag |= B4000000; break;
+ default:
+ BT_DBG("set_baud_rate unknown rate %d", baud_rate);
+ return -EINVAL;
+ }
+
+ ktermios.c_cflag &= ~CBAUD;
+ ktermios.c_cflag |= cflag;
+ ktermios.c_ispeed = baud_rate;
+ ktermios.c_ospeed = baud_rate;
+ status = tty_set_termios(tty, &ktermios);
+ if (status) {
+ BT_DBG("set_baud_rate set_termios failure %d", status);
+ return status;
+ }
+
+ speed = tty_get_baud_rate(tty);
+ BT_DBG("set_baud_rate set_termios completed, spd %d", speed);
+ ktermios = tty->termios;
+ BT_DBG("set_baud_rate flags c_o %x c_l %x c_c %x spd %d/%d",
+ ktermios.c_oflag, ktermios.c_lflag, ktermios.c_cflag,
+ ktermios.c_ispeed, ktermios.c_ospeed);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_set_baud_rate);
+
int btbcm_setup_patchram(struct hci_dev *hdev)
{
char fw_name[64];
@@ -275,7 +407,8 @@ int btbcm_setup_patchram(struct hci_dev *hdev)
const char *hw_name = NULL;
struct sk_buff *skb;
struct hci_rp_read_local_version *ver;
- int i, err;
+ int i, err, is_uart = false;
+ struct hci_uart *hu = hci_get_drvdata(hdev);
/* Reset */
err = btbcm_reset(hdev);
@@ -297,14 +430,18 @@ int btbcm_setup_patchram(struct hci_dev *hdev)
if (IS_ERR(skb))
return PTR_ERR(skb);
- BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
+ BT_INFO("%s: BCM: chip id %u, rev 0x%x subver 0x%x",
+ hdev->name, skb->data[1], rev, subver);
kfree_skb(skb);
switch ((rev & 0xf000) >> 12) {
case 0:
+ case 1:
for (i = 0; bcm_uart_subver_table[i].name; i++) {
if (subver == bcm_uart_subver_table[i].subver) {
hw_name = bcm_uart_subver_table[i].name;
+ BT_INFO("UART firmware found: %s", hw_name);
+ is_uart = true;
break;
}
}
@@ -312,7 +449,7 @@ int btbcm_setup_patchram(struct hci_dev *hdev)
snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
hw_name ? : "BCM");
break;
- case 1:
+
case 2:
/* Read USB Product Info */
skb = btbcm_read_usb_product(hdev);
@@ -345,11 +482,25 @@ int btbcm_setup_patchram(struct hci_dev *hdev)
if (err == -ENOENT)
return 0;
+ /* Once the patch is downloaded, the device is back at default rate */
+ if (is_uart) {
+ err = btbcm_init_uart(hu);
+ if (err)
+ return 0;
+ }
+
/* Reset */
err = btbcm_reset(hdev);
if (err)
return err;
+ if (is_uart) {
+ err = btbcm_set_baud_rate(hu,
+ bcm_uart_subver_table[i].baud_rate);
+ if (err)
+ return 0;
+ }
+
/* Read Local Version Info */
skb = btbcm_read_local_version(hdev);
if (IS_ERR(skb))
diff --git a/drivers/bluetooth/btbcm.h b/drivers/bluetooth/btbcm.h
index eb6ab5f..f7d30c6 100644
--- a/drivers/bluetooth/btbcm.h
+++ b/drivers/bluetooth/btbcm.h
@@ -2,7 +2,8 @@
*
* Bluetooth support for Broadcom devices
*
- * Copyright (C) 2015 Intel Corporation
+ * Copyright (C) 2015 Intel Corporation
+ * Copyright (C) 2015 Broadcom Corporation
*
*
* This program is free software; you can redistribute it and/or modify
@@ -15,10 +16,6 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#if IS_ENABLED(CONFIG_BT_BCM)
@@ -30,6 +27,8 @@ int btbcm_patchram(struct hci_dev *hdev, const char *firmware);
int btbcm_setup_patchram(struct hci_dev *hdev);
int btbcm_setup_apple(struct hci_dev *hdev);
+int btbcm_init_uart(struct hci_uart *hu);
+int btbcm_set_baud_rate(struct hci_uart *hu, int baud_rate);
#else
static inline int btbcm_check_bdaddr(struct hci_dev *hdev)
@@ -57,4 +56,14 @@ static inline int btbcm_setup_apple(struct hci_dev *hdev)
return 0;
}
+static int btbcm_init_uart(void *hu)
+{
+ return 0;
+}
+
+static int btbcm_set_baud_rate(void *hu, int baud_rate);
+{
+ return 0;
+}
+
#endif
diff --git a/drivers/bluetooth/btbcm_uart.c b/drivers/bluetooth/btbcm_uart.c
new file mode 100644
index 0000000..3308bdb
--- /dev/null
+++ b/drivers/bluetooth/btbcm_uart.c
@@ -0,0 +1,679 @@
+/*
+ *
+ * Bluetooth BCM UART Driver
+ *
+ * Copyright (c) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/poll.h>
+
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/signal.h>
+#include <linux/ioctl.h>
+#include <linux/skbuff.h>
+#include <linux/list.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+
+#include "btbcm_uart.h"
+
+static int idleTimeout = 5;
+module_param(idleTimeout, int, 0);
+MODULE_PARM_DESC(idleTimeout, "Bluetooth idle timeout in seconds");
+
+/* Device context */
+struct bcm_device {
+ struct list_head list;
+
+ struct platform_device *pdev;
+ struct gpio_desc *bt_wake_gpio;
+ struct gpio_desc *dev_wake_gpio;
+ struct gpio_desc *reg_on_gpio;
+ int bt_wake_irq;
+ int dev_wake_active_low;
+ int reg_on_active_low;
+ int bt_wake_active_low;
+ u32 configure_sleep;
+ u32 manual_fc;
+ u32 baud_rate_before_config_download;
+ u32 configure_audio;
+ u32 PCMClockMode;
+ u32 PCMFillMethod;
+ u32 PCMFillNum;
+ u32 PCMFillValue;
+ u32 PCMInCallBitclock;
+ u32 PCMLSBFirst;
+ u32 PCMRightJustify;
+ u32 PCMRouting;
+ u32 PCMShortFrameSync;
+ u32 PCMSyncMode;
+
+ char tty_name[64];
+
+ struct btbcm_uart_callbacks protocol_callbacks;
+ struct work_struct wakeup_work;
+};
+
+/* List of BCM BT UART devices */
+static DEFINE_SPINLOCK(device_list_lock);
+static LIST_HEAD(device_list);
+
+/*
+ * Calling the BCM protocol at lower execution priority
+ */
+static void bcm_bt_wakeup_task(struct work_struct *ws)
+{
+ int resume_flag;
+ struct bcm_device *p_bcm_device =
+ container_of(ws, struct bcm_device, wakeup_work);
+
+ if (!p_bcm_device) {
+ BT_DBG("bcm_bt_wakeup_task - failing, no device");
+ return;
+ }
+
+ /* Make sure the device is resumed */
+ resume_flag = !p_bcm_device->dev_wake_active_low;
+ if (p_bcm_device->dev_wake_gpio) {
+ gpiod_set_value(p_bcm_device->dev_wake_gpio, resume_flag);
+ BT_DBG("bcm_bt_wakeup_task - resume %d written, delaying 15 ms",
+ resume_flag);
+ mdelay(15);
+ }
+
+ /* Let the protocol know it's time to wake up */
+ if (p_bcm_device->protocol_callbacks.p_wakeup)
+ p_bcm_device->protocol_callbacks.p_wakeup(
+ p_bcm_device->protocol_callbacks.context);
+}
+
+/*
+ * Interrupt routine for the wake from the device
+ */
+static irqreturn_t bcm_bt_uart_isr(int irq, void *context)
+{
+ unsigned int bt_wake;
+ struct bcm_device *p = (struct bcm_device *)context;
+
+ bt_wake = gpiod_get_value(p->bt_wake_gpio);
+ BT_DBG("bcm_bt_uart_isr with bt_wake of %d (active_low %d), req bh",
+ bt_wake, p->bt_wake_active_low);
+
+ /* Defer the actual processing to the platform work queue */
+ schedule_work(&p->wakeup_work);
+ return IRQ_HANDLED;
+}
+
+/*
+ * Device instance startup
+ */
+static int bcm_bt_uart_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct device_node *np = pdev->dev.of_node;
+ const char *tty_name;
+ struct bcm_device *p_bcm_device = NULL;
+
+ p_bcm_device = devm_kzalloc(&pdev->dev, sizeof(*p_bcm_device),
+ GFP_KERNEL);
+ if (!p_bcm_device) {
+ BT_DBG("bcm_bt_uart_probe - failing due to no memory");
+ return -ENOMEM;
+ }
+ p_bcm_device->pdev = pdev;
+ BT_DBG("bcm_bt_uart_probe %p context", p_bcm_device);
+
+ /* Get dev wake GPIO */
+ p_bcm_device->dev_wake_gpio = gpiod_get(&pdev->dev, "bt-wake");
+ BT_DBG("bcm_bt_uart_probe - gpiod_get for bt-wake returned %p",
+ p_bcm_device->dev_wake_gpio);
+ if (IS_ERR(p_bcm_device->dev_wake_gpio)) {
+ ret = PTR_ERR(p_bcm_device->dev_wake_gpio);
+ if (ret != -ENOENT) {
+ dev_err(&pdev->dev,
+ "bcm_bt_uart_probe - dev_wake GPIO: %d\n", ret);
+ }
+ p_bcm_device->dev_wake_gpio = NULL;
+ } else {
+ int resume_flag;
+
+ p_bcm_device->dev_wake_active_low = gpiod_is_active_low
+ (p_bcm_device->dev_wake_gpio);
+ BT_DBG("bcm_bt_uart_probe - dev_wake a-low is %d (cans %d)",
+ p_bcm_device->dev_wake_active_low,
+ gpiod_cansleep(p_bcm_device->dev_wake_gpio));
+
+ /* configure dev_wake as output with init resumed state */
+ resume_flag = !p_bcm_device->dev_wake_active_low;
+ ret = gpiod_direction_output(p_bcm_device->dev_wake_gpio,
+ resume_flag);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "bcm_bt_uart_probe s dev_wake GPIO: %d\n", ret);
+ gpiod_put(p_bcm_device->dev_wake_gpio);
+ p_bcm_device->dev_wake_gpio = NULL;
+ goto end;
+ } else {
+ BT_DBG("bcm_bt_uart_probe - dev_wake set to %d",
+ resume_flag);
+ }
+ }
+
+ /* Get power on/off GPIO */
+ p_bcm_device->reg_on_gpio = gpiod_get(&pdev->dev, "reg-on");
+ BT_DBG("bcm_bt_uart_probe - gpiod_get for reg-on returned %p",
+ p_bcm_device->reg_on_gpio);
+ if (IS_ERR(p_bcm_device->reg_on_gpio)) {
+ ret = PTR_ERR(p_bcm_device->reg_on_gpio);
+ if (ret != -ENOENT) {
+ dev_err(&pdev->dev,
+ "bcm_bt_uart_probe - reg_on GPIO: %d\n", ret);
+ }
+ p_bcm_device->reg_on_gpio = NULL;
+ } else {
+ int poweron_flag;
+
+ p_bcm_device->reg_on_active_low = gpiod_is_active_low
+ (p_bcm_device->reg_on_gpio);
+ BT_DBG("bcm_bt_uart_probe - reg_on a-low is %d (cans %d)",
+ p_bcm_device->reg_on_active_low,
+ gpiod_cansleep(p_bcm_device->reg_on_gpio));
+
+ /* configure reg_on as output with init on state */
+ poweron_flag = !p_bcm_device->reg_on_active_low;
+ ret = gpiod_direction_output(p_bcm_device->reg_on_gpio,
+ poweron_flag);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "bcm_bt_uart_probe s reg_on GPIO: %d\n", ret);
+ gpiod_put(p_bcm_device->reg_on_gpio);
+ p_bcm_device->reg_on_gpio = NULL;
+ } else {
+ BT_DBG("bcm_bt_uart_probe - reg_on initially set to %d",
+ poweron_flag);
+ }
+ }
+
+ platform_set_drvdata(pdev, p_bcm_device);
+ /* Must be done before interrupt is requested */
+ INIT_WORK(&p_bcm_device->wakeup_work, bcm_bt_wakeup_task);
+
+ /* Get bt host wake GPIO */
+ p_bcm_device->bt_wake_gpio = gpiod_get(&pdev->dev, "bt-host-wake");
+ BT_DBG("bcm_bt_uart_probe - gpiod_get for bt-host-wake returned %p",
+ p_bcm_device->bt_wake_gpio);
+ if (IS_ERR(p_bcm_device->bt_wake_gpio)) {
+ ret = PTR_ERR(p_bcm_device->bt_wake_gpio);
+ if (ret != -ENOENT) {
+ dev_err(&pdev->dev,
+ "bcm_bt_uart_probe - bt_wake GPIO: %d\n", ret);
+ }
+ p_bcm_device->bt_wake_gpio = NULL;
+ } else {
+ /* configure bt_wake as input */
+ ret = gpiod_direction_input(p_bcm_device->bt_wake_gpio);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "bcm_bt_uart_probe s bt_wake GPIO: %d\n", ret);
+ gpiod_put(p_bcm_device->bt_wake_gpio);
+ p_bcm_device->bt_wake_gpio = NULL;
+ } else {
+ p_bcm_device->bt_wake_active_low = gpiod_is_active_low
+ (p_bcm_device->bt_wake_gpio);
+ BT_DBG("bcm_bt_uart_probe -bt_wake a-low is %d(cans%d)",
+ p_bcm_device->bt_wake_active_low,
+ gpiod_cansleep(p_bcm_device->bt_wake_gpio));
+ p_bcm_device->bt_wake_irq = gpiod_to_irq
+ (p_bcm_device->bt_wake_gpio);
+ if (p_bcm_device->bt_wake_irq < 0) {
+ dev_err(&pdev->dev,
+ "bcm_bt_uart_probe - HOST_WAKE IRQ: %d\n", ret);
+ } else {
+ unsigned long intflags = IRQF_TRIGGER_RISING;
+
+ if (p_bcm_device->bt_wake_active_low)
+ intflags = IRQF_TRIGGER_FALLING;
+
+ ret = request_irq(p_bcm_device->bt_wake_irq,
+ bcm_bt_uart_isr,
+ intflags, "bt_host_wake",
+ p_bcm_device);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "bcm_bt_uart_probe - failed to conf IRQ %d: %d",
+ p_bcm_device->bt_wake_irq, ret);
+ } else {
+ BT_DBG("bcm_bt_uart_probe - IRQ %d",
+ p_bcm_device->bt_wake_irq);
+ }
+ }
+ }
+ }
+
+ p_bcm_device->configure_sleep = 0;
+ if (!of_property_read_u32(np, "configure-sleep",
+ &p_bcm_device->configure_sleep)) {
+ BT_DBG("configure-sleep read as %d",
+ p_bcm_device->configure_sleep);
+ }
+ p_bcm_device->manual_fc = 0;
+ if (!of_property_read_u32(np, "manual-fc",
+ &p_bcm_device->manual_fc)) {
+ BT_DBG("manual-fc read as %d",
+ p_bcm_device->manual_fc);
+ }
+ p_bcm_device->baud_rate_before_config_download = 3000000;
+ if (!of_property_read_u32(
+ np, "baud-rate-before-config-download",
+ &p_bcm_device->baud_rate_before_config_download)) {
+ BT_DBG("baud-rate-before-config-download read as %d",
+ p_bcm_device->baud_rate_before_config_download);
+ }
+ p_bcm_device->configure_audio = 0;
+ if (!of_property_read_u32(np, "configure-audio",
+ &p_bcm_device->configure_audio)) {
+ BT_DBG("configure-audio read as %d",
+ p_bcm_device->configure_audio);
+ }
+ if (p_bcm_device->configure_audio) {
+ /* Defaults for audio */
+ p_bcm_device->PCMClockMode = 0;
+ p_bcm_device->PCMFillMethod = 2;
+ p_bcm_device->PCMFillNum = 0;
+ p_bcm_device->PCMFillValue = 3;
+ p_bcm_device->PCMInCallBitclock = 0;
+ p_bcm_device->PCMLSBFirst = 0;
+ p_bcm_device->PCMRightJustify = 0;
+ p_bcm_device->PCMRouting = 0;
+ p_bcm_device->PCMShortFrameSync = 0;
+ p_bcm_device->PCMSyncMode = 0;
+
+ if (!of_property_read_u32(np, "PCMClockMode",
+ &p_bcm_device->PCMClockMode))
+ BT_DBG("PCMClockMode read as %d",
+ p_bcm_device->PCMClockMode);
+ if (!of_property_read_u32(np, "PCMFillMethod",
+ &p_bcm_device->PCMFillMethod))
+ BT_DBG("PCMFillMethod readas %d",
+ p_bcm_device->PCMFillMethod);
+ if (!of_property_read_u32(np, "PCMFillNum",
+ &p_bcm_device->PCMFillNum))
+ BT_DBG("PCMFillNum read as %d",
+ p_bcm_device->PCMFillNum);
+ if (!of_property_read_u32(np, "PCMFillValue",
+ &p_bcm_device->PCMFillValue))
+ BT_DBG("PCMFillValue read as %d",
+ p_bcm_device->PCMFillValue);
+ if (!of_property_read_u32(np, "PCMInCallBitclock",
+ &p_bcm_device->PCMInCallBitclock))
+ BT_DBG("PCMInCallBitclock read as %d",
+ p_bcm_device->PCMInCallBitclock);
+ if (!of_property_read_u32(np, "PCMLSBFirst",
+ &p_bcm_device->PCMLSBFirst))
+ BT_DBG("PCMLSBFirst read as %d",
+ p_bcm_device->PCMLSBFirst);
+ if (!of_property_read_u32(np, "PCMRightJustify",
+ &p_bcm_device->PCMRightJustify))
+ BT_DBG("PCMRightJustify read as %d",
+ p_bcm_device->PCMRightJustify);
+ if (!of_property_read_u32(np, "PCMRouting",
+ &p_bcm_device->PCMRouting))
+ BT_DBG("PCMRouting read as %d",
+ p_bcm_device->PCMRouting);
+ if (!of_property_read_u32(np, "PCMShortFrameSync",
+ &p_bcm_device->PCMShortFrameSync))
+ BT_DBG("PCMShortFrameSync read as %d",
+ p_bcm_device->PCMShortFrameSync);
+ if (!of_property_read_u32(np, "PCMSyncMode",
+ &p_bcm_device->PCMSyncMode))
+ BT_DBG("PCMSyncMode read as %d",
+ p_bcm_device->PCMSyncMode);
+ }
+
+ if (!of_property_read_string(np, "tty", &tty_name)) {
+ strcpy(p_bcm_device->tty_name, tty_name);
+ BT_DBG("tty name read as %s", p_bcm_device->tty_name);
+ }
+
+ BT_DBG("idleTimeout set as %d", idleTimeout);
+
+ ret = 0; /* If we made it here, we're fine */
+
+ /* Place this instance on the device list */
+ spin_lock(&device_list_lock);
+ list_add_tail(&p_bcm_device->list, &device_list);
+ spin_unlock(&device_list_lock);
+
+end:
+ if (ret) {
+ if (p_bcm_device->reg_on_gpio) {
+ gpiod_put(p_bcm_device->reg_on_gpio);
+ p_bcm_device->reg_on_gpio = NULL;
+ }
+ if (p_bcm_device->bt_wake_gpio) {
+ gpiod_put(p_bcm_device->bt_wake_gpio);
+ p_bcm_device->bt_wake_gpio = NULL;
+ }
+ if (p_bcm_device->dev_wake_gpio) {
+ gpiod_put(p_bcm_device->dev_wake_gpio);
+ p_bcm_device->dev_wake_gpio = NULL;
+ }
+ }
+
+ BT_DBG("bcm_bt_uart_probe with the result %d", ret);
+ return ret;
+}
+
+/*
+ * Device instance removal
+ */
+static int bcm_bt_uart_remove(struct platform_device *pdev)
+{
+ struct bcm_device *p_bcm_device = platform_get_drvdata(pdev);
+
+ if (p_bcm_device == NULL) {
+ BT_DBG("bcm_bt_uart_remove - logic error, no probe?!");
+ return 0;
+ }
+
+ BT_DBG("bcm_bt_uart_remove %p context", p_bcm_device);
+
+ spin_lock(&device_list_lock);
+ list_del(&p_bcm_device->list);
+ spin_unlock(&device_list_lock);
+
+ BT_DBG("bcm_bt_uart_remove - freeing interrupt %d",
+ p_bcm_device->bt_wake_irq);
+ free_irq(p_bcm_device->bt_wake_irq, p_bcm_device);
+
+ if (p_bcm_device->reg_on_gpio) {
+ BT_DBG("bcm_bt_uart_remove - releasing reg_on_gpio");
+ gpiod_put(p_bcm_device->reg_on_gpio);
+ p_bcm_device->reg_on_gpio = NULL;
+ }
+
+ if (p_bcm_device->dev_wake_gpio) {
+ BT_DBG("bcm_bt_uart_remove - releasing dev_wake_gpio");
+ gpiod_put(p_bcm_device->dev_wake_gpio);
+ p_bcm_device->dev_wake_gpio = NULL;
+ }
+
+ if (p_bcm_device->bt_wake_gpio) {
+ BT_DBG("bcm_bt_uart_remove - releasing bt_wake_gpio");
+ gpiod_put(p_bcm_device->bt_wake_gpio);
+ p_bcm_device->bt_wake_gpio = NULL;
+ }
+
+ BT_DBG("bcm_bt_uart_remove %p done", p_bcm_device);
+ return 0;
+}
+
+/*
+ * Platform resume callback
+ */
+static int bcm_bt_uart_resume(struct device *pdev)
+{
+ int resume_flag;
+ struct bcm_device *p_bcm_device = platform_get_drvdata(
+ to_platform_device(pdev));
+
+ if (p_bcm_device == NULL) {
+ BT_DBG("bcm_bt_uart_resume - logic error, no device?!");
+ return 0;
+ }
+
+ BT_DBG("bcm_bt_uart_resume %p", p_bcm_device);
+
+ resume_flag = !p_bcm_device->dev_wake_active_low;
+ if (p_bcm_device->dev_wake_gpio) {
+ gpiod_set_value(p_bcm_device->dev_wake_gpio, resume_flag);
+ BT_DBG("bcm_bt_uart_resume: %d written, delaying 15 ms",
+ resume_flag);
+ mdelay(15);
+ }
+
+ /* Let the protocol know the platform is resuming */
+ if (p_bcm_device->protocol_callbacks.p_resume)
+ p_bcm_device->protocol_callbacks.p_resume(
+ p_bcm_device->protocol_callbacks.context);
+
+ return 0;
+}
+
+/*
+ * Platform suspend callback
+ */
+static int bcm_bt_uart_suspend(struct device *pdev)
+{
+ int resume_flag;
+ struct bcm_device *p_bcm_device = platform_get_drvdata(
+ to_platform_device(pdev));
+
+ if (p_bcm_device == NULL) {
+ BT_DBG("bcm_bt_uart_suspend - logic error, no device?!");
+ return 0;
+ }
+
+ BT_DBG("bcm_bt_uart_suspend %p", p_bcm_device);
+
+ /* Let the protocol know the platform is suspending */
+ if (p_bcm_device->protocol_callbacks.p_suspend)
+ p_bcm_device->protocol_callbacks.p_suspend(
+ p_bcm_device->protocol_callbacks.context);
+
+ /* Suspend the device */
+ if (p_bcm_device->dev_wake_gpio) {
+ resume_flag = !p_bcm_device->dev_wake_active_low;
+ gpiod_set_value(p_bcm_device->dev_wake_gpio, !resume_flag);
+ BT_DBG("bcm_bt_uart_suspend: %d written, delaying 15 ms",
+ !resume_flag);
+ mdelay(15);
+ }
+
+ return 0;
+}
+
+/*
+ * Entry point for calls from the protocol
+ */
+int btbcm_uart_control(int action, void *device_context,
+ void *p_data, unsigned long *p_size)
+{
+ struct btbcm_uart_callbacks *pc;
+ struct btbcm_uart_parameters *pp = p_data; /* for pars action only */
+ int ret = 0;
+ int resume_flag, poweron_flag;
+ struct bcm_device *p_bcm_device = device_context;
+ struct list_head *ptr;
+ bool is_found = false;
+
+ /* Special processing for the callback configuration */
+ if (action == BTBCM_UART_ACTION_CONFIGURE_CALLBACKS) {
+ pc = p_data;
+
+ BT_DBG("btbcm_uart_control - configure callbacks");
+ if ((p_data == NULL) || *p_size != sizeof(struct
+ btbcm_uart_callbacks) || (pc->interface_version !=
+ BTBCM_UART_INTERFACE_VERSION)) {
+ BT_DBG("btbcm_uart_control - callbacks mismatch!");
+ return -E2BIG;
+ }
+
+ BT_DBG("btbcm_uart_control - configure callbacks for %s(%p)",
+ pc->name, pc->context);
+ if (p_bcm_device == NULL) {
+ spin_lock(&device_list_lock);
+ list_for_each(ptr, &device_list) {
+ p_bcm_device = list_entry(ptr, struct
+ bcm_device, list);
+ if (!strcmp(p_bcm_device->tty_name, pc->name)) {
+ is_found = true;
+ break;
+ }
+ }
+
+ spin_unlock(&device_list_lock);
+ if (!is_found) {
+ BT_DBG("btbcm_uart_control - no device!");
+ return -ENOENT;
+ }
+ }
+
+ p_bcm_device->protocol_callbacks = *pc;
+ memcpy(p_data, &p_bcm_device, sizeof(p_bcm_device));
+ *p_size = sizeof(p_bcm_device);
+ return ret;
+ }
+
+ /* All other requests must have the right context */
+ if (p_bcm_device == NULL) {
+ BT_DBG("btbcm_uart_control - failing, no device");
+ return -ENOENT;
+ }
+
+ switch (action) {
+ case BTBCM_UART_ACTION_POWER_ON:
+ BT_DBG("btbcm_uart_control %p - power on", device_context);
+ if (p_bcm_device->reg_on_gpio) {
+ poweron_flag = !p_bcm_device->reg_on_active_low;
+ gpiod_set_value(p_bcm_device->reg_on_gpio,
+ poweron_flag);
+ BT_DBG("btbcm_uart_control - pwron %d, delay 15 ms",
+ poweron_flag);
+ mdelay(15);
+ }
+ break;
+
+ case BTBCM_UART_ACTION_POWER_OFF:
+ BT_DBG("btbcm_uart_control %p - power off", device_context);
+ if (p_bcm_device->reg_on_gpio) {
+ poweron_flag = p_bcm_device->reg_on_active_low;
+ gpiod_set_value(p_bcm_device->reg_on_gpio,
+ poweron_flag);
+ BT_DBG("btbcm_uart_control - pwroff %d, delay 15 ms",
+ poweron_flag);
+ mdelay(15);
+ }
+ break;
+
+ case BTBCM_UART_ACTION_RESUME:
+ BT_DBG("btbcm_uart_control %p - resume", device_context);
+ if (p_bcm_device->dev_wake_gpio) {
+ resume_flag = !p_bcm_device->dev_wake_active_low;
+ gpiod_set_value(p_bcm_device->dev_wake_gpio,
+ resume_flag);
+ BT_DBG("btbcm_uart_control - resume %d, delay 15 ms",
+ resume_flag);
+ mdelay(15);
+ }
+ break;
+
+ case BTBCM_UART_ACTION_SUSPEND:
+ BT_DBG("btbcm_uart_control %p - suspend", device_context);
+ if (p_bcm_device->dev_wake_gpio) {
+ resume_flag = !p_bcm_device->dev_wake_active_low;
+ gpiod_set_value(p_bcm_device->dev_wake_gpio,
+ !resume_flag);
+ BT_DBG("btbcm_uart_control - suspend %d, delay 15ms",
+ !resume_flag);
+ mdelay(15);
+ }
+ break;
+
+ case BTBCM_UART_ACTION_GET_PARAMETERS:
+ BT_DBG("btbcm_uart_control %p - get pars", device_context);
+ if ((p_data == NULL) ||
+ (*p_size < sizeof(struct btbcm_uart_parameters))) {
+ BT_DBG("btbcm_uart_control - failing, wrong par size");
+ return -E2BIG;
+ }
+
+ memset(pp, 0, sizeof(struct btbcm_uart_parameters));
+ pp->interface_version = BTBCM_UART_INTERFACE_VERSION;
+ pp->configure_sleep = p_bcm_device->configure_sleep;
+ pp->manual_fc = p_bcm_device->manual_fc;
+ pp->dev_wake_active_low = p_bcm_device->dev_wake_active_low;
+ pp->bt_wake_active_low = p_bcm_device->bt_wake_active_low;
+ pp->idle_timeout_in_secs = idleTimeout;
+ pp->baud_rate_before_config_download =
+ p_bcm_device->baud_rate_before_config_download;
+ pp->configure_audio = p_bcm_device->configure_audio;
+ pp->PCMClockMode = p_bcm_device->PCMClockMode;
+ pp->PCMFillMethod = p_bcm_device->PCMFillMethod;
+ pp->PCMFillNum = p_bcm_device->PCMFillNum;
+ pp->PCMFillValue = p_bcm_device->PCMFillValue;
+ pp->PCMInCallBitclock = p_bcm_device->PCMInCallBitclock;
+ pp->PCMLSBFirst = p_bcm_device->PCMLSBFirst;
+ pp->PCMRightJustify = p_bcm_device->PCMRightJustify;
+ pp->PCMRouting = p_bcm_device->PCMRouting;
+ pp->PCMShortFrameSync = p_bcm_device->PCMShortFrameSync;
+ pp->PCMSyncMode = p_bcm_device->PCMSyncMode;
+ *p_size = sizeof(struct btbcm_uart_parameters);
+ break;
+
+ default:
+ BT_DBG("btbcm_uart_control %p unknown act %d",
+ device_context, action);
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(btbcm_uart_control);
+
+/* Platform susp and resume callbacks */
+static SIMPLE_DEV_PM_OPS(bcm_bt_uart_pm_ops,
+ bcm_bt_uart_suspend, bcm_bt_uart_resume);
+
+/* Driver match table */
+static const struct of_device_id bcm_bt_uart_match_table[] = {
+ { .compatible = "brcm,brcm-bt-uart" },
+ {}
+};
+
+/* Driver configuration */
+static struct platform_driver bcm_bt_uart_platform_driver = {
+ .probe = bcm_bt_uart_probe,
+ .remove = bcm_bt_uart_remove,
+ .driver = {
+ .name = "brcm_bt_uart",
+ .of_match_table = of_match_ptr(bcm_bt_uart_match_table),
+ .owner = THIS_MODULE,
+ .pm = &bcm_bt_uart_pm_ops,
+ },
+};
+
+module_platform_driver(bcm_bt_uart_platform_driver);
+
+MODULE_AUTHOR("Ilya Faenson");
+MODULE_DESCRIPTION("Broadcom Bluetooth UART Driver");
+MODULE_LICENSE("Dual BSD/GPL");
+
diff --git a/drivers/bluetooth/btbcm_uart.h b/drivers/bluetooth/btbcm_uart.h
new file mode 100644
index 0000000..5801753
--- /dev/null
+++ b/drivers/bluetooth/btbcm_uart.h
@@ -0,0 +1,90 @@
+/*
+ *
+ * Bluetooth BCM UART Driver Header
+ *
+ * Copyright (c) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#ifndef BTBCM_UART_H
+#define BTBCM_UART_H
+
+/* Change the version if you change anything in this header */
+#define BTBCM_UART_INTERFACE_VERSION 1
+
+/* Callbacks from the driver into the protocol */
+typedef void (*p_suspend_callback)(void *context);
+typedef void (*p_resume_callback)(void *context);
+typedef void (*p_wakeup_callback)(void *context);
+struct btbcm_uart_callbacks {
+ int interface_version; /* interface # compiled against */
+ void *context; /* protocol instance context */
+ char name[64]; /* protocol tty device, for example, ttyS0 */
+
+ /* Callbacks proper */
+ p_suspend_callback p_suspend;
+ p_resume_callback p_resume;
+ p_wakeup_callback p_wakeup;
+};
+
+/* Driver parameters retrieved from the DT or ACPI */
+struct btbcm_uart_parameters {
+ int interface_version; /* interface # compiled against */
+
+ /* Parameters proper */
+ int configure_sleep;
+ int manual_fc;
+ int dev_wake_active_low;
+ int bt_wake_active_low;
+ int idle_timeout_in_secs;
+ int baud_rate_before_config_download;
+ int configure_audio;
+ int PCMClockMode;
+ int PCMFillMethod;
+ int PCMFillNum;
+ int PCMFillValue;
+ int PCMInCallBitclock;
+ int PCMLSBFirst;
+ int PCMRightJustify;
+ int PCMRouting;
+ int PCMShortFrameSync;
+ int PCMSyncMode;
+};
+
+/*
+ * Actions on the BTBCM_UART driver
+ */
+
+/* Configure protocol callbacks */
+#define BTBCM_UART_ACTION_CONFIGURE_CALLBACKS 0
+
+/* Retrieve BT device parameters */
+#define BTBCM_UART_ACTION_GET_PARAMETERS 1
+
+/* Resume the BT device via GPIO */
+#define BTBCM_UART_ACTION_RESUME 2
+
+/* Suspend the BT device via GPIO */
+#define BTBCM_UART_ACTION_SUSPEND 3
+
+/* Power the BT device off via GPIO */
+#define BTBCM_UART_ACTION_POWER_OFF 4
+
+/* Power the BT device on via GPIO */
+#define BTBCM_UART_ACTION_POWER_ON 5
+
+/* Execute an action on the BT device */
+extern int btbcm_uart_control(int action, void *device_context,
+ void *p_data, unsigned long *p_size);
+
+#endif
+
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 1ec0b4a..e70f89b 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -1,8 +1,13 @@
/*
*
- * Bluetooth HCI UART driver for Broadcom devices
+ * Bluetooth UART H4 protocol for Broadcom devices
*
- * Copyright (C) 2015 Intel Corporation
+ * Copyright (c) 2015 Intel Corporation
+ * Copyright (c) 2015 Broadcom Corporation
+ *
+ * Acknowledgements:
+ * This file has been based on hci_h4.c originally developed
+ * by Maxim Krasnyansky and Marcel Holtmann.
*
*
* This program is free software; you can redistribute it and/or modify
@@ -15,139 +20,842 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
+#include <linux/module.h>
+
#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/poll.h>
+
+#include <linux/slab.h>
+#include <linux/tty.h>
#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/signal.h>
+#include <linux/ioctl.h>
#include <linux/skbuff.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
-#include "btbcm.h"
+#include <linux/gpio/consumer.h>
+#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+
#include "hci_uart.h"
+#include "btbcm.h"
+#include "btbcm_uart.h"
-struct bcm_data {
- struct sk_buff *rx_skb;
+/* Protocol context */
+struct bcm_h4_struct {
struct sk_buff_head txq;
+ struct hci_uart *hu;
+
+ bool is_suspended; /* suspend/resume flag */
+
+ /* Recv data parsing is not used in normal operation */
+ bool parse_recv;
+ /* buffer includes the type */
+ unsigned char reassembly[1 + HCI_MAX_FRAME_SIZE];
+ unsigned int rsize;
+ u16 rexpected;
+
+ struct timer_list timer; /* idle timer */
+
+ struct btbcm_uart_parameters pars; /* device parameters */
+ void *device_context; /* ACPI/DT device context */
};
-static int bcm_open(struct hci_uart *hu)
+/* Static function prototypes for forward references */
+static void suspend_notification(void *context);
+static void resume_notification(void *context);
+static void wakeup_notification(void *context);
+static void bcm_ensure_wakeup(struct hci_uart *hu);
+
+/* Suspend/resume synchronization mutex */
+static DEFINE_MUTEX(plock);
+
+/*
+ * Idle timer callback
+ */
+static void bcm_idle_timeout(unsigned long arg)
{
- struct bcm_data *bcm;
+ struct hci_uart *hu = (struct hci_uart *)arg;
+ struct bcm_h4_struct *h4 = hu->priv;
+ int status;
- BT_DBG("hu %p", hu);
+ BT_DBG("bcm_idle_timeout hu %p", hu);
+
+ /* Suspend/resume operations are serialized */
+ mutex_lock(&plock);
+
+ if (!h4->is_suspended) {
+ /* Flow control the port if configured */
+ suspend_notification(hu);
+
+ /* Suspend the device */
+ status = btbcm_uart_control(BTBCM_UART_ACTION_SUSPEND,
+ h4->device_context, NULL, NULL);
+ if (status)
+ BT_DBG("bcm_idle_timeout failed to suspend device %d",
+ status);
+ }
- bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
- if (!bcm)
+ mutex_unlock(&plock);
+}
+
+/*
+ * Initialize protocol
+ */
+static int bcm_h4_open(struct hci_uart *hu)
+{
+ struct btbcm_uart_callbacks callbacks;
+ unsigned long callbacks_size = sizeof(callbacks);
+ int status;
+ struct bcm_h4_struct *h4;
+ struct tty_struct *tty = hu->tty;
+
+ BT_DBG("bcm_h4_open hu %p", hu);
+
+ h4 = kzalloc(sizeof(*h4), GFP_KERNEL);
+ if (!h4)
return -ENOMEM;
- skb_queue_head_init(&bcm->txq);
+ skb_queue_head_init(&h4->txq);
+ hu->priv = h4;
+ h4->hu = hu;
+ h4->is_suspended = false;
+ h4->parse_recv = false;
+ h4->rsize = 0;
+
+ /* Configure callbacks on the driver */
+ callbacks.interface_version = BTBCM_UART_INTERFACE_VERSION;
+ callbacks.context = hu;
+ strcpy(callbacks.name, tty->name);
+ callbacks.p_suspend = suspend_notification;
+ callbacks.p_resume = resume_notification;
+ callbacks.p_wakeup = wakeup_notification;
+ status = btbcm_uart_control(BTBCM_UART_ACTION_CONFIGURE_CALLBACKS,
+ NULL, &callbacks, &callbacks_size);
+ if (status) {
+ BT_DBG("bcm_h4_open failed to set driver callbacks %d", status);
+ return status;
+ }
+ if (callbacks_size != sizeof(void *)) {
+ BT_DBG("bcm_h4_open got back %d bytes from callbacks?!",
+ (int)callbacks_size);
+ return -EMSGSIZE;
+ }
+ memcpy(&h4->device_context, &callbacks, sizeof(void *));
+ BT_DBG("bcm_h4_open callbacks context %p", h4->device_context);
+
+ /* Retrieve device parameters */
+ callbacks_size = sizeof(h4->pars);
+ status = btbcm_uart_control(BTBCM_UART_ACTION_GET_PARAMETERS,
+ h4->device_context, &h4->pars,
+ &callbacks_size);
+ if (status) {
+ BT_DBG("bcm_h4_open failed to get dev parameters %d", status);
+ return status;
+ }
+ BT_DBG("Pars ver %d csleep %d dalow %d balow %d idle %d",
+ h4->pars.interface_version, h4->pars.configure_sleep,
+ h4->pars.dev_wake_active_low, h4->pars.bt_wake_active_low,
+ h4->pars.idle_timeout_in_secs);
+
+ /* Cycle power to make sure the device is in the known state */
+ status = btbcm_uart_control(BTBCM_UART_ACTION_POWER_OFF,
+ h4->device_context, NULL, NULL);
+ if (status) {
+ BT_DBG("bcm_h4_open failed to power off %d", status);
+ } else {
+ status = btbcm_uart_control(BTBCM_UART_ACTION_POWER_ON,
+ h4->device_context, NULL, NULL);
+ if (status)
+ BT_DBG("bcm_h4_open failed to power on %d", status);
+ }
+
+ /* Start the idle timer */
+ if (h4->pars.configure_sleep) {
+ setup_timer(&h4->timer, bcm_idle_timeout, (unsigned long)hu);
+ if (h4->pars.configure_sleep)
+ mod_timer(&h4->timer, jiffies + msecs_to_jiffies(
+ h4->pars.idle_timeout_in_secs * 1000));
+ }
+
+ return 0;
+}
+
+/*
+ * Flush protocol data
+ */
+static int bcm_h4_flush(struct hci_uart *hu)
+{
+ struct bcm_h4_struct *h4 = hu->priv;
- hu->priv = bcm;
+ BT_DBG("bcm_h4_flush hu %p", hu);
+
+ skb_queue_purge(&h4->txq);
return 0;
}
-static int bcm_close(struct hci_uart *hu)
+/*
+ * Make sure we're awake
+ * (called when the resumed state is required)
+ */
+static void bcm_ensure_wakeup(struct hci_uart *hu)
{
- struct bcm_data *bcm = hu->priv;
+ struct bcm_h4_struct *h4 = hu->priv;
+ int status;
+
+ if (!h4->pars.configure_sleep)
+ return;
+
+ /* Suspend/resume operations are serialized */
+ mutex_lock(&plock);
+
+ /* Nothing to do if resumed already */
+ if (!h4->is_suspended) {
+ mutex_unlock(&plock);
- BT_DBG("hu %p", hu);
+ /* Just reset the timer */
+ status = mod_timer(&h4->timer, jiffies + msecs_to_jiffies(
+ h4->pars.idle_timeout_in_secs * 1000));
+ return;
+ }
+
+ /* Wakeup the device */
+ status = btbcm_uart_control(BTBCM_UART_ACTION_RESUME,
+ h4->device_context, NULL, NULL);
+ if (status)
+ BT_DBG("bcm_ensure_wakeup failed to resume driver %d", status);
- skb_queue_purge(&bcm->txq);
- kfree_skb(bcm->rx_skb);
- kfree(bcm);
+ /* Unflow control the port if configured */
+ resume_notification(hu);
+
+ mutex_unlock(&plock);
+}
+
+/*
+ * Close protocol
+ */
+static int bcm_h4_close(struct hci_uart *hu)
+{
+ struct btbcm_uart_callbacks callbacks;
+ unsigned long callbacks_size = sizeof(callbacks);
+ struct bcm_h4_struct *h4 = hu->priv;
+ int status;
hu->priv = NULL;
+
+ BT_DBG("bcm_h4_close hu %p", hu);
+
+ /* If we're being closed, we must suspend */
+ if (h4->pars.configure_sleep) {
+ mutex_lock(&plock);
+
+ if (!h4->is_suspended) {
+ /* Flow control the port */
+ suspend_notification(hu);
+
+ /* Suspend the device */
+ status = btbcm_uart_control(BTBCM_UART_ACTION_SUSPEND,
+ h4->device_context, NULL,
+ NULL);
+ if (status) {
+ BT_DBG("bcm_h4_close suspend driver fail %d",
+ status);
+ }
+ }
+
+ mutex_unlock(&plock);
+
+ del_timer_sync(&h4->timer);
+ }
+
+ /* Power off the device if possible */
+ status = btbcm_uart_control(BTBCM_UART_ACTION_POWER_OFF,
+ h4->device_context, NULL, NULL);
+ if (status)
+ BT_DBG("bcm_h4_close failed to power off %d", status);
+
+ /* de-configure callbacks on the driver */
+ callbacks.interface_version = BTBCM_UART_INTERFACE_VERSION;
+ callbacks.context = hu;
+ callbacks.p_suspend = NULL;
+ callbacks.p_resume = NULL;
+ callbacks.p_wakeup = NULL;
+ status = btbcm_uart_control(BTBCM_UART_ACTION_CONFIGURE_CALLBACKS,
+ h4->device_context, &callbacks,
+ &callbacks_size);
+ if (status)
+ BT_DBG("bcm_h4_close failed to reset drv callbacks %d", status);
+ skb_queue_purge(&h4->txq);
+
+ hu->priv = NULL;
+ kfree(h4);
+
return 0;
}
-static int bcm_flush(struct hci_uart *hu)
+/*
+ * Enqueue frame for transmittion (padding, crc, etc)
+ */
+static int bcm_h4_enqueue(struct hci_uart *hu, struct sk_buff *skb)
{
- struct bcm_data *bcm = hu->priv;
+ struct bcm_h4_struct *h4 = hu->priv;
+
+ BT_DBG("bcm_h4_enqueue hu %p skb %p type %d len %d (%x %x %x)",
+ hu, skb, bt_cb(skb)->pkt_type, skb->len,
+ skb->data[0], skb->data[1], skb->data[2]);
- BT_DBG("hu %p", hu);
+ /* Make sure we're resumed */
+ bcm_ensure_wakeup(hu);
- skb_queue_purge(&bcm->txq);
+ /* Prepend skb with frame type */
+ memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+ skb_queue_tail(&h4->txq, skb);
return 0;
}
-static int bcm_setup(struct hci_uart *hu)
+/*
+ * HCI event processing if our own parsing of events is required
+ * NOTE: return 0 if the event is not to be passed up to BlueZ
+ */
+static bool bcm_process_hci_event(struct hci_uart *hu)
+{
+ struct bcm_h4_struct *h4 = hu->priv;
+ int status;
+ unsigned char evt_code = h4->reassembly[1];
+ unsigned char len = h4->reassembly[2];
+
+ BT_DBG("bcm_process_hci_event %02x event %02x len %02x %02x",
+ h4->reassembly[0], evt_code, len, h4->reassembly[3]);
+
+ /* switch (evt_code) { case HCI_EV_CMD_COMPLETE: break } */
+
+ status = hci_recv_stream_fragment(hu->hdev, h4->reassembly, h4->rsize);
+ if (status < 0)
+ BT_ERR("bcm_process_hci_event - reassembly failed %d", status);
+ return true;
+}
+
+/*
+ * ACL data processing if our own parsing of data is required
+ * NOTE: return 0 if the data is not to be passed up to BlueZ
+ */
+static bool bcm_process_acl_data(struct hci_uart *hu)
{
- BT_DBG("hu %p", hu);
+ struct bcm_h4_struct *h4 = hu->priv;
+ int ret;
- hu->hdev->set_bdaddr = btbcm_set_bdaddr;
+ BT_DBG("bcm_process_acl_data %02x %02x %02x %02x %02x",
+ h4->reassembly[0], h4->reassembly[1], h4->reassembly[2],
+ h4->reassembly[3], h4->reassembly[4]);
- return btbcm_setup_patchram(hu->hdev);
+ ret = hci_recv_stream_fragment(hu->hdev, h4->reassembly, h4->rsize);
+ if (ret < 0)
+ BT_ERR("bcm_process_acl_data - Frame Reassembly Failed");
+ return true;
}
-static const struct h4_recv_pkt bcm_recv_pkts[] = {
- { H4_RECV_ACL, .recv = hci_recv_frame },
- { H4_RECV_SCO, .recv = hci_recv_frame },
- { H4_RECV_EVENT, .recv = hci_recv_frame },
-};
+/*
+ * Fragment parsing in the active filtering phase
+ * (not currently actively used)
+ */
+static void parse_fragment(struct hci_uart *hu, unsigned char *data, int count)
+{
+ struct bcm_h4_struct *h4 = hu->priv;
+
+ if (h4->rsize)
+ BT_DBG("parse_fragment type %x expected %d",
+ h4->reassembly[0], h4->rexpected);
+
+ while (count) {
+ if (!h4->rsize) {
+ /* Start of the frame */
+ h4->reassembly[0] = *data++;
+ h4->rsize++;
+ count--;
+ continue;
+ }
+
+ switch (h4->reassembly[0]) {
+ case HCI_EVENT_PKT:
+ if (h4->rsize == 1) {
+ /* event proper */
+ h4->reassembly[h4->rsize++] = *data++;
+ count--;
+ continue;
+ }
+ if (h4->rsize == 2) {
+ /* length */
+ h4->rexpected = *data;
+ h4->reassembly[h4->rsize++] = *data++;
+ count--;
+ BT_DBG("evthdr len %d, left %d", h4->rexpected, count);
+ continue;
+ }
+ if (count >= h4->rexpected) {
+ memcpy(&h4->reassembly[h4->rsize], data, h4->rexpected);
+ h4->rsize += h4->rexpected;
+ data += h4->rexpected;
+ count -= h4->rexpected;
+ bcm_process_hci_event(hu);
+ h4->rsize = 0; /* starting anew */
+ continue;
+ }
+ /* only piece of the event received */
+ memcpy(&h4->reassembly[h4->rsize], data, count);
+ h4->rsize += count;
+ data += count;
+ h4->rexpected -= count;
+ count = 0;
+ break;
+
+ case HCI_ACLDATA_PKT:
+ if ((h4->rsize == 1) || (h4->rsize == 2) || (h4->rsize == 3)) {
+ /* handle and first byte of length */
+ h4->reassembly[h4->rsize++] = *data++;
+ count--;
+ continue;
+ }
+ if (h4->rsize == 4) {
+ /* last byte of the length */
+ h4->reassembly[h4->rsize++] = *data++;
+ h4->rexpected = h4->reassembly[h4->rsize - 2] +
+ (h4->reassembly[h4->rsize - 1] << 8);
+ count--;
+ BT_DBG("dathdr len %d, left %d", h4->rexpected, count);
+ continue;
+ }
+ if (count >= h4->rexpected) {
+ memcpy(&h4->reassembly[h4->rsize], data, h4->rexpected);
+ h4->rsize += h4->rexpected;
+ data += h4->rexpected;
+ count -= h4->rexpected;
+ bcm_process_acl_data(hu);
+ h4->rsize = 0; /* starting anew */
+ continue;
+ }
+ /* only piece of data received */
+ memcpy(&h4->reassembly[h4->rsize], data, count);
+ h4->rsize += count;
+ data += count;
+ h4->rexpected -= count;
+ count = 0;
+ break;
+
+ default: /* Note that SCO may NOT come through the UART */
+ if (count >= 3)
+ BT_DBG("unexpected pkt type of %x (%02x %02x %02x)?!",
+ h4->reassembly[0], data[0], data[1], data[2]);
+ else if (count == 2)
+ BT_DBG("unexpected pkt type of %x (%02x %02x)?!",
+ h4->reassembly[0], data[0], data[1]);
+ else if (count == 1)
+ BT_DBG("unexpected pkt type of %x (%02x)?!",
+ h4->reassembly[0], data[0]);
+ else
+ BT_DBG("unexpected pkt type of %x?!",
+ h4->reassembly[0]);
+ h4->rsize = 0;
+ return;
+ }
+ }
+}
-static int bcm_recv(struct hci_uart *hu, const void *data, int count)
+/*
+ * Data indication from the line discipline
+ */
+static int bcm_h4_recv(struct hci_uart *hu, void *data, int count)
{
- struct bcm_data *bcm = hu->priv;
+ struct bcm_h4_struct *h4 = hu->priv;
+ int ret;
- if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
+ BT_DBG("bcm_h4_recv hu %p len %d", hu, count);
+
+ if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) {
+ BT_DBG("h4_recv UART not registered!");
return -EUNATCH;
+ }
- bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
- bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
- if (IS_ERR(bcm->rx_skb)) {
- int err = PTR_ERR(bcm->rx_skb);
- BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
- return err;
+ /* Make sure we're resumed */
+ bcm_ensure_wakeup(hu);
+
+ /* If we're in the active phase, parse what we get */
+ if (h4->parse_recv) {
+ parse_fragment(hu, data, count);
+ } else {
+ ret = hci_recv_stream_fragment(hu->hdev, data, count);
+ if (ret < 0) {
+ BT_ERR("bcm_h4_recv: frame reassembly failed");
+ return ret;
+ }
}
return count;
}
-static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
+/*
+ * Line discipline is grabbing a packet from the tx queue
+ */
+static struct sk_buff *bcm_h4_dequeue(struct hci_uart *hu)
{
- struct bcm_data *bcm = hu->priv;
+ struct bcm_h4_struct *h4 = hu->priv;
+ int is_qempty = skb_queue_empty(&h4->txq);
- BT_DBG("hu %p skb %p", hu, skb);
+ if (!is_qempty)
+ BT_DBG("bcm_h4_dequeue with non-empty queue");
+ return skb_dequeue(&h4->txq);
+}
- /* Prepend skb with frame type */
- memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
- skb_queue_tail(&bcm->txq, skb);
+/*
+ * Callbacks from the BCMBT_UART device
+ */
- return 0;
+/*
+ * The platform is suspending. Stop UART activity
+ */
+static void suspend_notification(void *context)
+{
+ struct ktermios ktermios;
+ struct hci_uart *hu = (struct hci_uart *)context;
+ struct bcm_h4_struct *h4 = hu->priv;
+ struct tty_struct *tty = hu->tty;
+ int status;
+ unsigned int set = 0;
+ unsigned int clear = 0;
+
+ BT_DBG("suspend_notification with is_suspended %d", h4->is_suspended);
+
+ if (!h4->pars.configure_sleep)
+ return;
+
+ if (!h4->is_suspended) {
+ if (h4->pars.manual_fc) {
+ /* Disable hardware flow control */
+ ktermios = tty->termios;
+ ktermios.c_cflag &= ~CRTSCTS;
+ status = tty_set_termios(tty, &ktermios);
+ if (status)
+ BT_DBG("suspend_notification dis fc fail %d",
+ status);
+ else
+ BT_DBG("suspend_notification hw fc disabled");
+
+ /* Clear RTS to prevent the device from sending */
+ /* (most PCs need OUT2 to enable interrupts) */
+ status = tty->driver->ops->tiocmget(tty);
+ BT_DBG("suspend_notification cur tiocm 0x%x", status);
+ set &= ~(TIOCM_OUT2 | TIOCM_RTS);
+ clear = ~set;
+ set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
+ TIOCM_OUT2 | TIOCM_LOOP;
+ clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
+ TIOCM_OUT2 | TIOCM_LOOP;
+ status = tty->driver->ops->tiocmset(tty, set, clear);
+ if (status)
+ BT_DBG("suspend_notification clr RTS fail %d",
+ status);
+ else
+ BT_DBG("suspend_notification RTS cleared");
+ status = tty->driver->ops->tiocmget(tty);
+ BT_DBG("suspend_notification end tiocm 0x%x", status);
+ }
+
+ /* Once this callback returns, driver suspends BT via GPIO */
+ h4->is_suspended = true;
+ }
+}
+
+/*
+ * The platform is resuming. Resume UART activity.
+ */
+static void resume_notification(void *context)
+{
+ struct ktermios ktermios;
+ struct hci_uart *hu = (struct hci_uart *)context;
+ struct bcm_h4_struct *h4 = hu->priv;
+ struct tty_struct *tty = hu->tty;
+ int status;
+ unsigned int set = 0;
+ unsigned int clear = 0;
+
+ BT_DBG("resume_notification with is_suspended %d", h4->is_suspended);
+
+ if (!h4->pars.configure_sleep)
+ return;
+
+ /* When this callback executes, the device has woken up already */
+ if (h4->is_suspended) {
+ h4->is_suspended = false;
+
+ if (h4->pars.manual_fc) {
+ status = tty->driver->ops->tiocmget(tty);
+ BT_DBG("resume_notification cur tiocm 0x%x", status);
+ set |= (TIOCM_OUT2 | TIOCM_RTS);
+ clear = ~set;
+ set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
+ TIOCM_OUT2 | TIOCM_LOOP;
+ clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
+ TIOCM_OUT2 | TIOCM_LOOP;
+ status = tty->driver->ops->tiocmset(tty, set, clear);
+ if (status)
+ BT_DBG("resume_notification set RTS fail %d",
+ status);
+ else
+ BT_DBG("resume_notification RTS set");
+
+ /* Re-enable hardware flow control */
+ ktermios = tty->termios;
+ ktermios.c_cflag |= CRTSCTS;
+ status = tty_set_termios(tty, &ktermios);
+ if (status)
+ BT_DBG("resume_notification enable fc fail %d",
+ status);
+ else
+ BT_DBG("resume_notification hw fc re-enabled");
+ }
+ }
+
+ /* If we're resumed, the idle timer must be running */
+ status = mod_timer(&h4->timer, jiffies +
+ msecs_to_jiffies(h4->pars.idle_timeout_in_secs * 1000));
}
-static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
+/*
+ * The BT device is resuming. Resume UART activity if suspended
+ */
+static void wakeup_notification(void *context)
{
- struct bcm_data *bcm = hu->priv;
+ struct ktermios ktermios;
+ struct hci_uart *hu = (struct hci_uart *)context;
+ struct bcm_h4_struct *h4 = hu->priv;
+ struct tty_struct *tty = hu->tty;
+ int status;
+ unsigned int set = 0;
+ unsigned int clear = 0;
+
+ if (!h4->pars.configure_sleep)
+ return;
+
+ status = tty->driver->ops->tiocmget(tty);
+ BT_DBG("wakeup_notification hu %p current tiocm 0x%x", hu, status);
+ if (h4->is_suspended) {
+ if (h4->pars.manual_fc) {
+ set |= (TIOCM_OUT2 | TIOCM_RTS);
+ clear = ~set;
+ set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
+ TIOCM_OUT2 | TIOCM_LOOP;
+ clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
+ TIOCM_OUT2 | TIOCM_LOOP;
+ status = tty->driver->ops->tiocmset(tty, set, clear);
+ if (status)
+ BT_DBG("wakeup_notification set RTS fail %d",
+ status);
+ else
+ BT_DBG("wakeup_notification RTS set");
+
+ /* Re-enable hardware flow control */
+ ktermios = tty->termios;
+ ktermios.c_cflag |= CRTSCTS;
+ status = tty_set_termios(tty, &ktermios);
+ if (status)
+ BT_DBG("wakeup_notification fc-en failure %d",
+ status);
+ else
+ BT_DBG("wakeup_notification hw fc re-enabled");
+ }
+
+ h4->is_suspended = false;
+ }
- return skb_dequeue(&bcm->txq);
+ /* If we're resumed, the idle timer must be running */
+ status = mod_timer(&h4->timer, jiffies + msecs_to_jiffies(
+ h4->pars.idle_timeout_in_secs * 1000));
}
-static const struct hci_uart_proto bcm_proto = {
+/*
+ * Device setup that follows the protocol open
+ */
+static int bcm_h4_setup(struct hci_uart *hu)
+{
+ struct bcm_h4_struct *h4 = hu->priv;
+ int status;
+ struct sk_buff *skb;
+ unsigned char sleep_pars[] = {
+ 0x01, /* sleep mode 1=UART */
+ 0x02, /* idle threshold HOST (value * 300ms) */
+ 0x02, /* idle threshold HC (value * 300ms) */
+ 0x01, /* BT_WAKE active mode - 1=active high, 0 = active low */
+ 0x00, /* HOST_WAKE active mode - 1=active high, 0 = active low */
+ 0x01, /* Allow host sleep during SCO - FALSE */
+ 0x01, /* combine sleep mode and LPM - 1 == TRUE */
+ 0x00, /* enable tristate control of UART TX line - FALSE */
+ 0x00, /* USB auto-sleep on USB SUSPEND */
+ 0x00, /* USB USB RESUME timeout (seconds) */
+ 0x00, /* Pulsed Host Wake */
+ 0x00 /* Enable Break To Host */
+ };
+ unsigned char pcm_int_pars[] = {
+ 0x00, /* 0=PCM routing, 1=SCO over HCI */
+ 0x02, /* 0=128Kbps,1=256Kbps,2=512Kbps,3=1024Kbps,4=2048Kbps */
+ 0x00, /* short frame sync 0=short, 1=long */
+ 0x00, /* sync mode 0=slave, 1=master */
+ 0x00 /* clock mode 0=slave, 1=master */
+ };
+ unsigned char pcm_format_pars[] = {
+ 0x00, /* LSB_First 1=TRUE, 0=FALSE */
+ 0x00, /* Fill_Value (use 0-7 for fill bits value) */
+ 0x02, /* Fill_Method (2=sign extended) */
+ 0x03, /* Fill_Num # of fill bits 0-3) */
+ 0x01 /* Right_Justify 1=TRUE, 0=FALSE */
+ };
+ unsigned char time_slot_number = 0;
+
+ BT_DBG("bcm_h4_setup hu %p", hu);
+
+ /* Bring the UART into known default state */
+ status = btbcm_init_uart(hu);
+ if (status) {
+ BT_DBG("bcm_h4_setup failed to init BT device %d", status);
+ return status;
+ }
+
+ /* Basic sanity check */
+ skb = __hci_cmd_sync(hu->hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ status = PTR_ERR(skb);
+ BT_ERR("bcm_h4_setup HCI Reset failed (%d)", status);
+ return status;
+ }
+ kfree_skb(skb);
+ BT_DBG("bcm_h4_setup HCI Reset succeeded");
+
+ /* Set the new baud rate */
+ status = btbcm_set_baud_rate(hu,
+ h4->pars.baud_rate_before_config_download);
+ if (status) {
+ BT_ERR("bcm_h4_setup set_baud_rate faiilure %d", status);
+ return status;
+ }
+
+ hu->hdev->set_bdaddr = btbcm_set_bdaddr;
+
+ /* Download the firmware and reconfigure the UART afterwards */
+ status = btbcm_setup_patchram(hu->hdev);
+ if (status) {
+ BT_ERR("bcm_h4_setup setup_patchram faiilure %d", status);
+ return status;
+ }
+
+ /* Configure SCO PCM parameters */
+ if (h4->pars.configure_audio) {
+ pcm_int_pars[0] = h4->pars.PCMRouting;
+ pcm_int_pars[1] = h4->pars.PCMInCallBitclock;
+ pcm_int_pars[2] = h4->pars.PCMShortFrameSync;
+ pcm_int_pars[3] = h4->pars.PCMSyncMode;
+ pcm_int_pars[4] = h4->pars.PCMClockMode;
+ skb = __hci_cmd_sync(hu->hdev, 0xfc1c, sizeof(pcm_int_pars),
+ pcm_int_pars, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ status = PTR_ERR(skb);
+ BT_ERR("bcm_h4_setup PCM INT VSC failed (%d)", status);
+ return status;
+ }
+ kfree_skb(skb);
+ BT_DBG("bcm_h4_setup PCM INT Parameters VSC succeeded");
+
+ pcm_format_pars[0] = h4->pars.PCMLSBFirst;
+ pcm_format_pars[1] = h4->pars.PCMFillValue;
+ pcm_format_pars[2] = h4->pars.PCMFillMethod;
+ pcm_format_pars[3] = h4->pars.PCMFillNum;
+ pcm_format_pars[4] = h4->pars.PCMRightJustify;
+ skb = __hci_cmd_sync(hu->hdev, 0xfc1e, sizeof(pcm_format_pars),
+ pcm_format_pars, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ status = PTR_ERR(skb);
+ BT_ERR("bcm_h4_setup PCM Format VSC failed (%d)",
+ status);
+ return status;
+ }
+ kfree_skb(skb);
+ BT_DBG("bcm_h4_setup PCM Format VSC succeeded");
+
+ skb = __hci_cmd_sync(hu->hdev, 0xfc22, sizeof(time_slot_number),
+ &time_slot_number, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ status = PTR_ERR(skb);
+ BT_ERR("bcm_h4_setup SCO Time Slot VSC failed (%d)",
+ status);
+ return status;
+ }
+ kfree_skb(skb);
+ BT_DBG("bcm_h4_setup SCO Time Slot VSC succeeded");
+ }
+
+ /* Configure device's suspend/resume operation */
+ if (h4->pars.configure_sleep) {
+ /* Override the default */
+ sleep_pars[3] = (unsigned char)!h4->pars.bt_wake_active_low;
+ sleep_pars[4] = (unsigned char)!h4->pars.dev_wake_active_low;
+ skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_pars),
+ sleep_pars, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ status = PTR_ERR(skb);
+ BT_ERR("bcm_h4_setup Sleep VSC failed (%d)", status);
+ return status;
+ }
+ kfree_skb(skb);
+ BT_DBG("bcm_h4_setup Set Sleep Parameters VSC succeeded");
+ }
+
+ return 0;
+}
+
+/*
+ * Protocol callbacks
+ */
+static struct hci_uart_proto h4p = {
.id = HCI_UART_BCM,
- .name = "BCM",
- .open = bcm_open,
- .close = bcm_close,
- .flush = bcm_flush,
- .setup = bcm_setup,
- .recv = bcm_recv,
- .enqueue = bcm_enqueue,
- .dequeue = bcm_dequeue,
+ .name = "UARTBCM",
+ .open = bcm_h4_open,
+ .close = bcm_h4_close,
+ .flush = bcm_h4_flush,
+ .setup = bcm_h4_setup,
+ .recv = bcm_h4_recv,
+ .enqueue = bcm_h4_enqueue,
+ .dequeue = bcm_h4_dequeue,
};
+/*
+ * Protocol init
+ */
int __init bcm_init(void)
{
- return hci_uart_register_proto(&bcm_proto);
+ int status = hci_uart_register_proto(&h4p);
+
+ if (!status)
+ BT_INFO("Broadcom H4 protocol initialized");
+ else
+ BT_ERR("Broadcom H4 protocol registration failed %d", status);
+
+ return status;
}
+/*
+ * Protocol shutdown
+ */
int __exit bcm_deinit(void)
{
- return hci_uart_unregister_proto(&bcm_proto);
+ BT_INFO("Broadcom H4 protocol de-initialized");
+ return hci_uart_unregister_proto(&h4p);
}
+
--
1.9.1
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