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-rw-r--r--drivers/bluetooth/Kconfig20
-rw-r--r--drivers/bluetooth/Makefile3
-rw-r--r--drivers/bluetooth/bluecard_cs.c5
-rw-r--r--drivers/bluetooth/btmrvl_sdio.c32
-rw-r--r--drivers/bluetooth/btqcomsmd.c32
-rw-r--r--drivers/bluetooth/btrtl.c13
-rw-r--r--drivers/bluetooth/btusb.c15
-rw-r--r--drivers/bluetooth/hci_bcm.c59
-rw-r--r--drivers/bluetooth/hci_h4.c17
-rw-r--r--drivers/bluetooth/hci_intel.c47
-rw-r--r--drivers/bluetooth/hci_ldisc.c45
-rw-r--r--drivers/bluetooth/hci_ll.c261
-rw-r--r--drivers/bluetooth/hci_nokia.c827
-rw-r--r--drivers/bluetooth/hci_serdev.c356
-rw-r--r--drivers/bluetooth/hci_uart.h8
15 files changed, 1643 insertions, 97 deletions
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 08e054507d0b..737d93ef27c5 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -76,6 +76,12 @@ config BT_HCIUART
Say Y here to compile support for Bluetooth UART devices into the
kernel or say M to compile it as module (hci_uart).
+config BT_HCIUART_SERDEV
+ bool
+ depends on SERIAL_DEV_BUS && BT_HCIUART
+ depends on SERIAL_DEV_BUS=y || SERIAL_DEV_BUS=BT_HCIUART
+ default y
+
config BT_HCIUART_H4
bool "UART (H4) protocol support"
depends on BT_HCIUART
@@ -86,6 +92,18 @@ config BT_HCIUART_H4
Say Y here to compile support for HCI UART (H4) protocol.
+config BT_HCIUART_NOKIA
+ tristate "UART Nokia H4+ protocol support"
+ depends on BT_HCIUART
+ depends on BT_HCIUART_SERDEV
+ depends on PM
+ help
+ Nokia H4+ is serial protocol for communication between Bluetooth
+ device and host. This protocol is required for Bluetooth devices
+ with UART interface in Nokia devices.
+
+ Say Y here to compile support for Nokia's H4+ protocol.
+
config BT_HCIUART_BCSP
bool "BCSP protocol support"
depends on BT_HCIUART
@@ -344,7 +362,7 @@ config BT_WILINK
config BT_QCOMSMD
tristate "Qualcomm SMD based HCI support"
- depends on QCOM_SMD || (COMPILE_TEST && QCOM_SMD=n)
+ depends on RPMSG || (COMPILE_TEST && RPMSG=n)
depends on QCOM_WCNSS_CTRL || (COMPILE_TEST && QCOM_WCNSS_CTRL=n)
select BT_QCA
help
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index 80627187c8b6..e693ca6eeed9 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -25,10 +25,13 @@ obj-$(CONFIG_BT_BCM) += btbcm.o
obj-$(CONFIG_BT_RTL) += btrtl.o
obj-$(CONFIG_BT_QCA) += btqca.o
+obj-$(CONFIG_BT_HCIUART_NOKIA) += hci_nokia.o
+
btmrvl-y := btmrvl_main.o
btmrvl-$(CONFIG_DEBUG_FS) += btmrvl_debugfs.o
hci_uart-y := hci_ldisc.o
+hci_uart-$(CONFIG_BT_HCIUART_SERDEV) += hci_serdev.o
hci_uart-$(CONFIG_BT_HCIUART_H4) += hci_h4.o
hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o
hci_uart-$(CONFIG_BT_HCIUART_LL) += hci_ll.o
diff --git a/drivers/bluetooth/bluecard_cs.c b/drivers/bluetooth/bluecard_cs.c
index c0b3b5576992..007c0a45f31b 100644
--- a/drivers/bluetooth/bluecard_cs.c
+++ b/drivers/bluetooth/bluecard_cs.c
@@ -695,9 +695,8 @@ static int bluecard_open(struct bluecard_info *info)
spin_lock_init(&(info->lock));
- init_timer(&(info->timer));
- info->timer.function = &bluecard_activity_led_timeout;
- info->timer.data = (u_long)info;
+ setup_timer(&(info->timer), &bluecard_activity_led_timeout,
+ (u_long)info);
skb_queue_head_init(&(info->txq));
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index 08e01f002bad..eb794f08b238 100644
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -20,6 +20,7 @@
#include <linux/firmware.h>
#include <linux/slab.h>
+#include <linux/suspend.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/sdio_func.h>
@@ -60,13 +61,15 @@ static const struct of_device_id btmrvl_sdio_of_match_table[] = {
static irqreturn_t btmrvl_wake_irq_bt(int irq, void *priv)
{
- struct btmrvl_plt_wake_cfg *cfg = priv;
+ struct btmrvl_sdio_card *card = priv;
+ struct btmrvl_plt_wake_cfg *cfg = card->plt_wake_cfg;
- if (cfg->irq_bt >= 0) {
- pr_info("%s: wake by bt", __func__);
- cfg->wake_by_bt = true;
- disable_irq_nosync(irq);
- }
+ pr_info("%s: wake by bt", __func__);
+ cfg->wake_by_bt = true;
+ disable_irq_nosync(irq);
+
+ pm_wakeup_event(&card->func->dev, 0);
+ pm_system_wakeup();
return IRQ_HANDLED;
}
@@ -101,7 +104,7 @@ static int btmrvl_sdio_probe_of(struct device *dev,
} else {
ret = devm_request_irq(dev, cfg->irq_bt,
btmrvl_wake_irq_bt,
- 0, "bt_wake", cfg);
+ 0, "bt_wake", card);
if (ret) {
dev_err(dev,
"Failed to request irq_bt %d (%d)\n",
@@ -1574,7 +1577,7 @@ static void btmrvl_sdio_remove(struct sdio_func *func)
MODULE_SHUTDOWN_REQ);
btmrvl_sdio_disable_host_int(card);
}
- BT_DBG("unregester dev");
+ BT_DBG("unregister dev");
card->priv->surprise_removed = true;
btmrvl_sdio_unregister_dev(card);
btmrvl_remove_card(card->priv);
@@ -1625,6 +1628,13 @@ static int btmrvl_sdio_suspend(struct device *dev)
if (priv->adapter->hs_state != HS_ACTIVATED) {
if (btmrvl_enable_hs(priv)) {
BT_ERR("HS not activated, suspend failed!");
+ /* Disable platform specific wakeup interrupt */
+ if (card->plt_wake_cfg &&
+ card->plt_wake_cfg->irq_bt >= 0) {
+ disable_irq_wake(card->plt_wake_cfg->irq_bt);
+ disable_irq(card->plt_wake_cfg->irq_bt);
+ }
+
priv->adapter->is_suspending = false;
return -EBUSY;
}
@@ -1637,10 +1647,10 @@ static int btmrvl_sdio_suspend(struct device *dev)
if (priv->adapter->hs_state == HS_ACTIVATED) {
BT_DBG("suspend with MMC_PM_KEEP_POWER");
return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
- } else {
- BT_DBG("suspend without MMC_PM_KEEP_POWER");
- return 0;
}
+
+ BT_DBG("suspend without MMC_PM_KEEP_POWER");
+ return 0;
}
static int btmrvl_sdio_resume(struct device *dev)
diff --git a/drivers/bluetooth/btqcomsmd.c b/drivers/bluetooth/btqcomsmd.c
index 8d4868af9bbd..ef730c173d4b 100644
--- a/drivers/bluetooth/btqcomsmd.c
+++ b/drivers/bluetooth/btqcomsmd.c
@@ -14,7 +14,7 @@
#include <linux/module.h>
#include <linux/slab.h>
-#include <linux/soc/qcom/smd.h>
+#include <linux/rpmsg.h>
#include <linux/soc/qcom/wcnss_ctrl.h>
#include <linux/platform_device.h>
@@ -26,8 +26,8 @@
struct btqcomsmd {
struct hci_dev *hdev;
- struct qcom_smd_channel *acl_channel;
- struct qcom_smd_channel *cmd_channel;
+ struct rpmsg_endpoint *acl_channel;
+ struct rpmsg_endpoint *cmd_channel;
};
static int btqcomsmd_recv(struct hci_dev *hdev, unsigned int type,
@@ -48,19 +48,19 @@ static int btqcomsmd_recv(struct hci_dev *hdev, unsigned int type,
return hci_recv_frame(hdev, skb);
}
-static int btqcomsmd_acl_callback(struct qcom_smd_channel *channel,
- const void *data, size_t count)
+static int btqcomsmd_acl_callback(struct rpmsg_device *rpdev, void *data,
+ int count, void *priv, u32 addr)
{
- struct btqcomsmd *btq = qcom_smd_get_drvdata(channel);
+ struct btqcomsmd *btq = priv;
btq->hdev->stat.byte_rx += count;
return btqcomsmd_recv(btq->hdev, HCI_ACLDATA_PKT, data, count);
}
-static int btqcomsmd_cmd_callback(struct qcom_smd_channel *channel,
- const void *data, size_t count)
+static int btqcomsmd_cmd_callback(struct rpmsg_device *rpdev, void *data,
+ int count, void *priv, u32 addr)
{
- struct btqcomsmd *btq = qcom_smd_get_drvdata(channel);
+ struct btqcomsmd *btq = priv;
return btqcomsmd_recv(btq->hdev, HCI_EVENT_PKT, data, count);
}
@@ -72,12 +72,12 @@ static int btqcomsmd_send(struct hci_dev *hdev, struct sk_buff *skb)
switch (hci_skb_pkt_type(skb)) {
case HCI_ACLDATA_PKT:
- ret = qcom_smd_send(btq->acl_channel, skb->data, skb->len);
+ ret = rpmsg_send(btq->acl_channel, skb->data, skb->len);
hdev->stat.acl_tx++;
hdev->stat.byte_tx += skb->len;
break;
case HCI_COMMAND_PKT:
- ret = qcom_smd_send(btq->cmd_channel, skb->data, skb->len);
+ ret = rpmsg_send(btq->cmd_channel, skb->data, skb->len);
hdev->stat.cmd_tx++;
break;
default:
@@ -114,18 +114,15 @@ static int btqcomsmd_probe(struct platform_device *pdev)
wcnss = dev_get_drvdata(pdev->dev.parent);
btq->acl_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_ACL",
- btqcomsmd_acl_callback);
+ btqcomsmd_acl_callback, btq);
if (IS_ERR(btq->acl_channel))
return PTR_ERR(btq->acl_channel);
btq->cmd_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_CMD",
- btqcomsmd_cmd_callback);
+ btqcomsmd_cmd_callback, btq);
if (IS_ERR(btq->cmd_channel))
return PTR_ERR(btq->cmd_channel);
- qcom_smd_set_drvdata(btq->acl_channel, btq);
- qcom_smd_set_drvdata(btq->cmd_channel, btq);
-
hdev = hci_alloc_dev();
if (!hdev)
return -ENOMEM;
@@ -158,6 +155,9 @@ static int btqcomsmd_remove(struct platform_device *pdev)
hci_unregister_dev(btq->hdev);
hci_free_dev(btq->hdev);
+ rpmsg_destroy_ept(btq->cmd_channel);
+ rpmsg_destroy_ept(btq->acl_channel);
+
return 0;
}
diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index fc9b25703c67..8279094dd713 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -275,11 +275,8 @@ static int rtl_load_config(struct hci_dev *hdev, const char *name, u8 **buff)
BT_INFO("%s: rtl: loading %s", hdev->name, name);
ret = request_firmware(&fw, name, &hdev->dev);
- if (ret < 0) {
- BT_ERR("%s: Failed to load %s", hdev->name, name);
+ if (ret < 0)
return ret;
- }
-
ret = fw->size;
*buff = kmemdup(fw->data, ret, GFP_KERNEL);
@@ -331,6 +328,7 @@ static int btrtl_setup_rtl8723b(struct hci_dev *hdev, u16 lmp_subver,
u8 *cfg_buff = NULL;
u8 *tbuff;
char *cfg_name = NULL;
+ bool config_needed = false;
switch (lmp_subver) {
case RTL_ROM_LMP_8723B:
@@ -344,6 +342,7 @@ static int btrtl_setup_rtl8723b(struct hci_dev *hdev, u16 lmp_subver,
break;
case RTL_ROM_LMP_8822B:
cfg_name = "rtl_bt/rtl8822b_config.bin";
+ config_needed = true;
break;
default:
BT_ERR("%s: rtl: no config according to lmp_subver %04x",
@@ -353,8 +352,12 @@ static int btrtl_setup_rtl8723b(struct hci_dev *hdev, u16 lmp_subver,
if (cfg_name) {
cfg_sz = rtl_load_config(hdev, cfg_name, &cfg_buff);
- if (cfg_sz < 0)
+ if (cfg_sz < 0) {
cfg_sz = 0;
+ if (config_needed)
+ BT_ERR("Necessary config file %s not found\n",
+ cfg_name);
+ }
} else
cfg_sz = 0;
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 1c8094ef3f22..7fa373b428f8 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -26,6 +26,7 @@
#include <linux/firmware.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
+#include <linux/suspend.h>
#include <asm/unaligned.h>
#include <net/bluetooth/bluetooth.h>
@@ -262,6 +263,7 @@ static const struct usb_device_id blacklist_table[] = {
{ USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME },
{ USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME },
{ USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME },
+ { USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME },
{ USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME },
{ USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME },
{ USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME },
@@ -328,6 +330,7 @@ static const struct usb_device_id blacklist_table[] = {
{ USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },
/* Intel Bluetooth devices */
+ { USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_NEW },
{ USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
{ USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
@@ -2024,13 +2027,18 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
return -EINVAL;
}
- /* At the moment the iBT 3.0 hardware variants 0x0b (LnP/SfP)
- * and 0x0c (WsP) are supported by this firmware loading method.
+ /* Check for supported iBT hardware variants of this firmware
+ * loading method.
*
* This check has been put in place to ensure correct forward
* compatibility options when newer hardware variants come along.
*/
- if (ver.hw_variant != 0x0b && ver.hw_variant != 0x0c) {
+ switch (ver.hw_variant) {
+ case 0x0b: /* SfP */
+ case 0x0c: /* WsP */
+ case 0x12: /* ThP */
+ break;
+ default:
BT_ERR("%s: Unsupported Intel hardware variant (%u)",
hdev->name, ver.hw_variant);
return -EINVAL;
@@ -2792,6 +2800,7 @@ static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
struct btusb_data *data = priv;
pm_wakeup_event(&data->udev->dev, 0);
+ pm_system_wakeup();
/* Disable only if not already disabled (keep it balanced) */
if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 5262a2077d7a..f87bfdfee4ff 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -146,13 +146,13 @@ static bool bcm_device_exists(struct bcm_device *device)
static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
{
if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
- clk_enable(dev->clk);
+ clk_prepare_enable(dev->clk);
gpiod_set_value(dev->shutdown, powered);
gpiod_set_value(dev->device_wakeup, powered);
if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
- clk_disable(dev->clk);
+ clk_disable_unprepare(dev->clk);
dev->clk_enabled = powered;
@@ -287,6 +287,9 @@ static int bcm_open(struct hci_uart *hu)
hu->priv = bcm;
+ if (!hu->tty->dev)
+ goto out;
+
mutex_lock(&bcm_device_lock);
list_for_each(p, &bcm_device_list) {
struct bcm_device *dev = list_entry(p, struct bcm_device, list);
@@ -307,7 +310,7 @@ static int bcm_open(struct hci_uart *hu)
}
mutex_unlock(&bcm_device_lock);
-
+out:
return 0;
}
@@ -697,28 +700,14 @@ static int bcm_resource(struct acpi_resource *ares, void *data)
/* Always tell the ACPI core to skip this resource */
return 1;
}
+#endif /* CONFIG_ACPI */
-static int bcm_acpi_probe(struct bcm_device *dev)
+static int bcm_platform_probe(struct bcm_device *dev)
{
struct platform_device *pdev = dev->pdev;
- LIST_HEAD(resources);
- const struct dmi_system_id *dmi_id;
- const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
- const struct acpi_device_id *id;
- int ret;
dev->name = dev_name(&pdev->dev);
- /* Retrieve GPIO data */
- id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
- if (id)
- gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data;
-
- ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
- gpio_mapping);
- if (ret)
- return ret;
-
dev->clk = devm_clk_get(&pdev->dev, NULL);
dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev,
@@ -755,6 +744,33 @@ static int bcm_acpi_probe(struct bcm_device *dev)
return -EINVAL;
}
+ return 0;
+}
+
+#ifdef CONFIG_ACPI
+static int bcm_acpi_probe(struct bcm_device *dev)
+{
+ struct platform_device *pdev = dev->pdev;
+ LIST_HEAD(resources);
+ const struct dmi_system_id *dmi_id;
+ const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
+ const struct acpi_device_id *id;
+ int ret;
+
+ /* Retrieve GPIO data */
+ id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
+ if (id)
+ gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data;
+
+ ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
+ gpio_mapping);
+ if (ret)
+ return ret;
+
+ ret = bcm_platform_probe(dev);
+ if (ret)
+ return ret;
+
/* Retrieve UART ACPI info */
ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev),
&resources, bcm_resource, dev);
@@ -789,7 +805,10 @@ static int bcm_probe(struct platform_device *pdev)
dev->pdev = pdev;
- ret = bcm_acpi_probe(dev);
+ if (has_acpi_companion(&pdev->dev))
+ ret = bcm_acpi_probe(dev);
+ else
+ ret = bcm_platform_probe(dev);
if (ret)
return ret;
diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c
index 635597b6e168..82e5a32b87a4 100644
--- a/drivers/bluetooth/hci_h4.c
+++ b/drivers/bluetooth/hci_h4.c
@@ -171,9 +171,20 @@ struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
const unsigned char *buffer, int count,
const struct h4_recv_pkt *pkts, int pkts_count)
{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+ u8 alignment = hu->alignment;
+
while (count) {
int i, len;
+ /* remove padding bytes from buffer */
+ for (; hu->padding && count > 0; hu->padding--) {
+ count--;
+ buffer++;
+ }
+ if (!count)
+ break;
+
if (!skb) {
for (i = 0; i < pkts_count; i++) {
if (buffer[0] != (&pkts[i])->type)
@@ -253,11 +264,17 @@ struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
}
if (!dlen) {
+ hu->padding = (skb->len - 1) % alignment;
+ hu->padding = (alignment - hu->padding) % alignment;
+
/* No more data, complete frame */
(&pkts[i])->recv(hdev, skb);
skb = NULL;
}
} else {
+ hu->padding = (skb->len - 1) % alignment;
+ hu->padding = (alignment - hu->padding) % alignment;
+
/* Complete frame */
(&pkts[i])->recv(hdev, skb);
skb = NULL;
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c
index 9e271286c5e5..fa5099986f1b 100644
--- a/drivers/bluetooth/hci_intel.c
+++ b/drivers/bluetooth/hci_intel.c
@@ -307,6 +307,9 @@ static int intel_set_power(struct hci_uart *hu, bool powered)
struct list_head *p;
int err = -ENODEV;
+ if (!hu->tty->dev)
+ return err;
+
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
@@ -379,6 +382,9 @@ static void intel_busy_work(struct work_struct *work)
struct intel_data *intel = container_of(work, struct intel_data,
busy_work);
+ if (!intel->hu->tty->dev)
+ return;
+
/* Link is busy, delay the suspend */
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
@@ -601,12 +607,18 @@ static int intel_setup(struct hci_uart *hu)
return -EINVAL;
}
- /* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is
- * supported by this firmware loading method. This check has been
- * put in place to ensure correct forward compatibility options
- * when newer hardware variants come along.
- */
- if (ver.hw_variant != 0x0b) {
+ /* Check for supported iBT hardware variants of this firmware
+ * loading method.
+ *
+ * This check has been put in place to ensure correct forward
+ * compatibility options when newer hardware variants come along.
+ */
+ switch (ver.hw_variant) {
+ case 0x0b: /* LnP */
+ case 0x0c: /* WsP */
+ case 0x12: /* ThP */
+ break;
+ default:
bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
ver.hw_variant);
return -EINVAL;
@@ -699,11 +711,14 @@ static int intel_setup(struct hci_uart *hu)
/* With this Intel bootloader only the hardware variant and device
* revision information are used to select the right firmware.
*
- * Currently this bootloader support is limited to hardware variant
- * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
+ * The firmware filename is ibt-<hw_variant>-<dev_revid>.sfi.
+ *
+ * Currently the supported hardware variants are:
+ * 11 (0x0b) for iBT 3.0 (LnP/SfP)
*/
- snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
- le16_to_cpu(params->dev_revid));
+ snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.sfi",
+ le16_to_cpu(ver.hw_variant),
+ le16_to_cpu(params->dev_revid));
err = request_firmware(&fw, fwname, &hdev->dev);
if (err < 0) {
@@ -716,8 +731,9 @@ static int intel_setup(struct hci_uart *hu)
bt_dev_info(hdev, "Found device firmware: %s", fwname);
/* Save the DDC file name for later */
- snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
- le16_to_cpu(params->dev_revid));
+ snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.ddc",
+ le16_to_cpu(ver.hw_variant),
+ le16_to_cpu(params->dev_revid));
kfree_skb(skb);
@@ -889,6 +905,8 @@ done:
list_for_each(p, &intel_device_list) {
struct intel_device *dev = list_entry(p, struct intel_device,
list);
+ if (!hu->tty->dev)
+ break;
if (hu->tty->dev->parent == dev->pdev->dev.parent) {
if (device_may_wakeup(&dev->pdev->dev)) {
set_bit(STATE_LPM_ENABLED, &intel->flags);
@@ -1056,6 +1074,9 @@ static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb)
BT_DBG("hu %p skb %p", hu, skb);
+ if (!hu->tty->dev)
+ goto out_enqueue;
+
/* Be sure our controller is resumed and potential LPM transaction
* completed before enqueuing any packet.
*/
@@ -1072,7 +1093,7 @@ static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb)
}
}
mutex_unlock(&intel_device_list_lock);
-
+out_enqueue:
skb_queue_tail(&intel->txq, skb);
return 0;
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 9497c469efd2..2edd30556956 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -113,16 +113,21 @@ static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
{
struct sk_buff *skb = hu->tx_skb;
- if (!skb)
- skb = hu->proto->dequeue(hu);
- else
+ if (!skb) {
+ if (test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ skb = hu->proto->dequeue(hu);
+ } else {
hu->tx_skb = NULL;
+ }
return skb;
}
int hci_uart_tx_wakeup(struct hci_uart *hu)
{
+ if (!test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ return 0;
+
if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) {
set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
return 0;
@@ -134,6 +139,7 @@ int hci_uart_tx_wakeup(struct hci_uart *hu)
return 0;
}
+EXPORT_SYMBOL_GPL(hci_uart_tx_wakeup);
static void hci_uart_write_work(struct work_struct *work)
{
@@ -176,6 +182,7 @@ static void hci_uart_init_work(struct work_struct *work)
{
struct hci_uart *hu = container_of(work, struct hci_uart, init_ready);
int err;
+ struct hci_dev *hdev;
if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
return;
@@ -183,9 +190,12 @@ static void hci_uart_init_work(struct work_struct *work)
err = hci_register_dev(hu->hdev);
if (err < 0) {
BT_ERR("Can't register HCI device");
- hci_free_dev(hu->hdev);
+ hdev = hu->hdev;
hu->hdev = NULL;
+ hci_free_dev(hdev);
+ clear_bit(HCI_UART_PROTO_READY, &hu->flags);
hu->proto->close(hu);
+ return;
}
set_bit(HCI_UART_REGISTERED, &hu->flags);
@@ -251,6 +261,9 @@ static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb),
skb->len);
+ if (!test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ return -EUNATCH;
+
hu->proto->enqueue(hu, skb);
hci_uart_tx_wakeup(hu);
@@ -318,25 +331,6 @@ void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
hu->oper_speed = oper_speed;
}
-void hci_uart_init_tty(struct hci_uart *hu)
-{
- struct tty_struct *tty = hu->tty;
- struct ktermios ktermios;
-
- /* Bring the UART into a known 8 bits no parity hw fc state */
- ktermios = tty->termios;
- 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);
- ktermios.c_cflag |= CS8;
- ktermios.c_cflag |= CRTSCTS;
-
- /* tty_set_termios() return not checked as it is always 0 */
- tty_set_termios(tty, &ktermios);
-}
-
void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed)
{
struct tty_struct *tty = hu->tty;
@@ -459,6 +453,10 @@ static int hci_uart_tty_open(struct tty_struct *tty)
hu->tty = tty;
tty->receive_room = 65536;
+ /* disable alignment support by default */
+ hu->alignment = 1;
+ hu->padding = 0;
+
INIT_WORK(&hu->init_ready, hci_uart_init_work);
INIT_WORK(&hu->write_work, hci_uart_write_work);
@@ -616,6 +614,7 @@ static int hci_uart_register_dev(struct hci_uart *hu)
if (hci_register_dev(hdev) < 0) {
BT_ERR("Can't register HCI device");
+ hu->hdev = NULL;
hci_free_dev(hdev);
return -ENODEV;
}
diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c
index 02692fe30279..adc444f309a3 100644
--- a/drivers/bluetooth/hci_ll.c
+++ b/drivers/bluetooth/hci_ll.c
@@ -34,20 +34,24 @@
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
+#include <linux/firmware.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/of.h>
+#include <linux/serdev.h>
#include <linux/skbuff.h>
+#include <linux/ti_wilink_st.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
+#include <linux/gpio/consumer.h>
#include "hci_uart.h"
@@ -76,6 +80,12 @@ struct hcill_cmd {
u8 cmd;
} __packed;
+struct ll_device {
+ struct hci_uart hu;
+ struct serdev_device *serdev;
+ struct gpio_desc *enable_gpio;
+};
+
struct ll_struct {
unsigned long rx_state;
unsigned long rx_count;
@@ -136,6 +146,9 @@ static int ll_open(struct hci_uart *hu)
hu->priv = ll;
+ if (hu->serdev)
+ serdev_device_open(hu->serdev);
+
return 0;
}
@@ -164,6 +177,13 @@ static int ll_close(struct hci_uart *hu)
kfree_skb(ll->rx_skb);
+ if (hu->serdev) {
+ struct ll_device *lldev = serdev_device_get_drvdata(hu->serdev);
+ gpiod_set_value_cansleep(lldev->enable_gpio, 0);
+
+ serdev_device_close(hu->serdev);
+ }
+
hu->priv = NULL;
kfree(ll);
@@ -505,9 +525,244 @@ static struct sk_buff *ll_dequeue(struct hci_uart *hu)
return skb_dequeue(&ll->txq);
}
+#if IS_ENABLED(CONFIG_SERIAL_DEV_BUS)
+static int read_local_version(struct hci_dev *hdev)
+{
+ int err = 0;
+ unsigned short version = 0;
+ struct sk_buff *skb;
+ struct hci_rp_read_local_version *ver;
+
+ skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ bt_dev_err(hdev, "Reading TI version information failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+ if (skb->len != sizeof(*ver)) {
+ err = -EILSEQ;
+ goto out;
+ }
+
+ ver = (struct hci_rp_read_local_version *)skb->data;
+ if (le16_to_cpu(ver->manufacturer) != 13) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ version = le16_to_cpu(ver->lmp_subver);
+
+out:
+ if (err) bt_dev_err(hdev, "Failed to read TI version info: %d", err);
+ kfree_skb(skb);
+ return err ? err : version;
+}
+
+/**
+ * download_firmware -
+ * internal function which parses through the .bts firmware
+ * script file intreprets SEND, DELAY actions only as of now
+ */
+static int download_firmware(struct ll_device *lldev)
+{
+ unsigned short chip, min_ver, maj_ver;
+ int version, err, len;
+ unsigned char *ptr, *action_ptr;
+ unsigned char bts_scr_name[40]; /* 40 char long bts scr name? */
+ const struct firmware *fw;
+ struct sk_buff *skb;
+ struct hci_command *cmd;
+
+ version = read_local_version(lldev->hu.hdev);
+ if (version < 0)
+ return version;
+
+ chip = (version & 0x7C00) >> 10;
+ min_ver = (version & 0x007F);
+ maj_ver = (version & 0x0380) >> 7;
+ if (version & 0x8000)
+ maj_ver |= 0x0008;
+
+ snprintf(bts_scr_name, sizeof(bts_scr_name),
+ "ti-connectivity/TIInit_%d.%d.%d.bts",
+ chip, maj_ver, min_ver);
+
+ err = request_firmware(&fw, bts_scr_name, &lldev->serdev->dev);
+ if (err || !fw->data || !fw->size) {
+ bt_dev_err(lldev->hu.hdev, "request_firmware failed(errno %d) for %s",
+ err, bts_scr_name);
+ return -EINVAL;
+ }
+ ptr = (void *)fw->data;
+ len = fw->size;
+ /* bts_header to remove out magic number and
+ * version
+ */
+ ptr += sizeof(struct bts_header);
+ len -= sizeof(struct bts_header);
+
+ while (len > 0 && ptr) {
+ bt_dev_dbg(lldev->hu.hdev, " action size %d, type %d ",
+ ((struct bts_action *)ptr)->size,
+ ((struct bts_action *)ptr)->type);
+
+ action_ptr = &(((struct bts_action *)ptr)->data[0]);
+
+ switch (((struct bts_action *)ptr)->type) {
+ case ACTION_SEND_COMMAND: /* action send */
+ bt_dev_dbg(lldev->hu.hdev, "S");
+ cmd = (struct hci_command *)action_ptr;
+ if (cmd->opcode == 0xff36) {
+ /* ignore remote change
+ * baud rate HCI VS command */
+ bt_dev_warn(lldev->hu.hdev, "change remote baud rate command in firmware");
+ break;
+ }
+ if (cmd->prefix != 1)
+ bt_dev_dbg(lldev->hu.hdev, "command type %d\n", cmd->prefix);
+
+ skb = __hci_cmd_sync(lldev->hu.hdev, cmd->opcode, cmd->plen, &cmd->speed, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ bt_dev_err(lldev->hu.hdev, "send command failed\n");
+ goto out_rel_fw;
+ }
+ kfree_skb(skb);
+ break;
+ case ACTION_WAIT_EVENT: /* wait */
+ /* no need to wait as command was synchronous */
+ bt_dev_dbg(lldev->hu.hdev, "W");
+ break;
+ case ACTION_DELAY: /* sleep */
+ bt_dev_info(lldev->hu.hdev, "sleep command in scr");
+ mdelay(((struct bts_action_delay *)action_ptr)->msec);
+ break;
+ }
+ len -= (sizeof(struct bts_action) +
+ ((struct bts_action *)ptr)->size);
+ ptr += sizeof(struct bts_action) +
+ ((struct bts_action *)ptr)->size;
+ }
+
+out_rel_fw:
+ /* fw download complete */
+ release_firmware(fw);
+ return err;
+}
+
+static int ll_setup(struct hci_uart *hu)
+{
+ int err, retry = 3;
+ struct ll_device *lldev;
+ struct serdev_device *serdev = hu->serdev;
+ u32 speed;
+
+ if (!serdev)
+ return 0;
+
+ lldev = serdev_device_get_drvdata(serdev);
+
+ serdev_device_set_flow_control(serdev, true);
+
+ do {
+ /* Configure BT_EN to HIGH state */
+ gpiod_set_value_cansleep(lldev->enable_gpio, 0);
+ msleep(5);
+ gpiod_set_value_cansleep(lldev->enable_gpio, 1);
+ msleep(100);
+
+ err = download_firmware(lldev);
+ if (!err)
+ break;
+
+ /* Toggle BT_EN and retry */
+ bt_dev_err(hu->hdev, "download firmware failed, retrying...");
+ } while (retry--);
+
+ if (err)
+ return err;
+
+ /* 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) {
+ struct sk_buff *skb = __hci_cmd_sync(hu->hdev, 0xff36, sizeof(speed), &speed, HCI_INIT_TIMEOUT);
+ if (!IS_ERR(skb)) {
+ kfree_skb(skb);
+ serdev_device_set_baudrate(serdev, speed);
+ }
+ }
+
+ return 0;
+}
+
+static const struct hci_uart_proto llp;
+
+static int hci_ti_probe(struct serdev_device *serdev)
+{
+ struct hci_uart *hu;
+ struct ll_device *lldev;
+ u32 max_speed = 3000000;
+
+ lldev = devm_kzalloc(&serdev->dev, sizeof(struct ll_device), GFP_KERNEL);
+ if (!lldev)
+ return -ENOMEM;
+ hu = &lldev->hu;
+
+ serdev_device_set_drvdata(serdev, lldev);
+ lldev->serdev = hu->serdev = serdev;
+
+ lldev->enable_gpio = devm_gpiod_get_optional(&serdev->dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(lldev->enable_gpio))
+ return PTR_ERR(lldev->enable_gpio);
+
+ of_property_read_u32(serdev->dev.of_node, "max-speed", &max_speed);
+ hci_uart_set_speeds(hu, 115200, max_speed);
+
+ return hci_uart_register_device(hu, &llp);
+}
+
+static void hci_ti_remove(struct serdev_device *serdev)
+{
+ struct ll_device *lldev = serdev_device_get_drvdata(serdev);
+ struct hci_uart *hu = &lldev->hu;
+ struct hci_dev *hdev = hu->hdev;
+
+ cancel_work_sync(&hu->write_work);
+
+ hci_unregister_dev(hdev);
+ hci_free_dev(hdev);
+ hu->proto->close(hu);
+}
+
+static const struct of_device_id hci_ti_of_match[] = {
+ { .compatible = "ti,wl1831-st" },
+ { .compatible = "ti,wl1835-st" },
+ { .compatible = "ti,wl1837-st" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, hci_ti_of_match);
+
+static struct serdev_device_driver hci_ti_drv = {
+ .driver = {
+ .name = "hci-ti",
+ .of_match_table = of_match_ptr(hci_ti_of_match),
+ },
+ .probe = hci_ti_probe,
+ .remove = hci_ti_remove,
+};
+#else
+#define ll_setup NULL
+#endif
+
static const struct hci_uart_proto llp = {
.id = HCI_UART_LL,
.name = "LL",
+ .setup = ll_setup,
.open = ll_open,
.close = ll_close,
.recv = ll_recv,
@@ -518,10 +773,14 @@ static const struct hci_uart_proto llp = {
int __init ll_init(void)
{
+ serdev_device_driver_register(&hci_ti_drv);
+
return hci_uart_register_proto(&llp);
}
int __exit ll_deinit(void)
{
+ serdev_device_driver_unregister(&hci_ti_drv);
+
return hci_uart_unregister_proto(&llp);
}
diff --git a/drivers/bluetooth/hci_nokia.c b/drivers/bluetooth/hci_nokia.c
new file mode 100644
index 000000000000..a7d687d8d456
--- /dev/null
+++ b/drivers/bluetooth/hci_nokia.c
@@ -0,0 +1,827 @@
+/*
+ * Bluetooth HCI UART H4 driver with Nokia Extensions AKA Nokia H4+
+ *
+ * Copyright (C) 2015 Marcel Holtmann <marcel@holtmann.org>
+ * Copyright (C) 2015-2017 Sebastian Reichel <sre@kernel.org>
+ *
+ * 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/clk.h>
+#include <linux/errno.h>
+#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/serdev.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/unaligned/le_struct.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "hci_uart.h"
+#include "btbcm.h"
+
+#define VERSION "0.1"
+
+#define NOKIA_ID_BCM2048 0x04
+#define NOKIA_ID_TI1271 0x31
+
+#define FIRMWARE_BCM2048 "nokia/bcmfw.bin"
+#define FIRMWARE_TI1271 "nokia/ti1273.bin"
+
+#define HCI_NOKIA_NEG_PKT 0x06
+#define HCI_NOKIA_ALIVE_PKT 0x07
+#define HCI_NOKIA_RADIO_PKT 0x08
+
+#define HCI_NOKIA_NEG_HDR_SIZE 1
+#define HCI_NOKIA_MAX_NEG_SIZE 255
+#define HCI_NOKIA_ALIVE_HDR_SIZE 1
+#define HCI_NOKIA_MAX_ALIVE_SIZE 255
+#define HCI_NOKIA_RADIO_HDR_SIZE 2
+#define HCI_NOKIA_MAX_RADIO_SIZE 255
+
+#define NOKIA_PROTO_PKT 0x44
+#define NOKIA_PROTO_BYTE 0x4c
+
+#define NOKIA_NEG_REQ 0x00
+#define NOKIA_NEG_ACK 0x20
+#define NOKIA_NEG_NAK 0x40
+
+#define H4_TYPE_SIZE 1
+
+#define NOKIA_RECV_ALIVE \
+ .type = HCI_NOKIA_ALIVE_PKT, \
+ .hlen = HCI_NOKIA_ALIVE_HDR_SIZE, \
+ .loff = 0, \
+ .lsize = 1, \
+ .maxlen = HCI_NOKIA_MAX_ALIVE_SIZE \
+
+#define NOKIA_RECV_NEG \
+ .type = HCI_NOKIA_NEG_PKT, \
+ .hlen = HCI_NOKIA_NEG_HDR_SIZE, \
+ .loff = 0, \
+ .lsize = 1, \
+ .maxlen = HCI_NOKIA_MAX_NEG_SIZE \
+
+#define NOKIA_RECV_RADIO \
+ .type = HCI_NOKIA_RADIO_PKT, \
+ .hlen = HCI_NOKIA_RADIO_HDR_SIZE, \
+ .loff = 1, \
+ .lsize = 1, \
+ .maxlen = HCI_NOKIA_MAX_RADIO_SIZE \
+
+struct hci_nokia_neg_hdr {
+ u8 dlen;
+} __packed;
+
+struct hci_nokia_neg_cmd {
+ u8 ack;
+ u16 baud;
+ u16 unused1;
+ u8 proto;
+ u16 sys_clk;
+ u16 unused2;
+} __packed;
+
+#define NOKIA_ALIVE_REQ 0x55
+#define NOKIA_ALIVE_RESP 0xcc
+
+struct hci_nokia_alive_hdr {
+ u8 dlen;
+} __packed;
+
+struct hci_nokia_alive_pkt {
+ u8 mid;
+ u8 unused;
+} __packed;
+
+struct hci_nokia_neg_evt {
+ u8 ack;
+ u16 baud;
+ u16 unused1;
+ u8 proto;
+ u16 sys_clk;
+ u16 unused2;
+ u8 man_id;
+ u8 ver_id;
+} __packed;
+
+#define MAX_BAUD_RATE 3692300
+#define SETUP_BAUD_RATE 921600
+#define INIT_BAUD_RATE 120000
+
+struct hci_nokia_radio_hdr {
+ u8 evt;
+ u8 dlen;
+} __packed;
+
+struct nokia_bt_dev {
+ struct hci_uart hu;
+ struct serdev_device *serdev;
+
+ struct gpio_desc *reset;
+ struct gpio_desc *wakeup_host;
+ struct gpio_desc *wakeup_bt;
+ unsigned long sysclk_speed;
+
+ int wake_irq;
+ struct sk_buff *rx_skb;
+ struct sk_buff_head txq;
+ bdaddr_t bdaddr;
+
+ int init_error;
+ struct completion init_completion;
+
+ u8 man_id;
+ u8 ver_id;
+
+ bool initialized;
+ bool tx_enabled;
+ bool rx_enabled;
+};
+
+static int nokia_enqueue(struct hci_uart *hu, struct sk_buff *skb);
+
+static void nokia_flow_control(struct serdev_device *serdev, bool enable)
+{
+ if (enable) {
+ serdev_device_set_rts(serdev, true);
+ serdev_device_set_flow_control(serdev, true);
+ } else {
+ serdev_device_set_flow_control(serdev, false);
+ serdev_device_set_rts(serdev, false);
+ }
+}
+
+static irqreturn_t wakeup_handler(int irq, void *data)
+{
+ struct nokia_bt_dev *btdev = data;
+ struct device *dev = &btdev->serdev->dev;
+ int wake_state = gpiod_get_value(btdev->wakeup_host);
+
+ if (btdev->rx_enabled == wake_state)
+ return IRQ_HANDLED;
+
+ if (wake_state)
+ pm_runtime_get(dev);
+ else
+ pm_runtime_put(dev);
+
+ btdev->rx_enabled = wake_state;
+
+ return IRQ_HANDLED;
+}
+
+static int nokia_reset(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ int err;
+
+ /* reset routine */
+ gpiod_set_value_cansleep(btdev->reset, 1);
+ gpiod_set_value_cansleep(btdev->wakeup_bt, 1);
+
+ msleep(100);
+
+ /* safety check */
+ err = gpiod_get_value_cansleep(btdev->wakeup_host);
+ if (err == 1) {
+ dev_err(dev, "reset: host wakeup not low!");
+ return -EPROTO;
+ }
+
+ /* flush queue */
+ serdev_device_write_flush(btdev->serdev);
+
+ /* init uart */
+ nokia_flow_control(btdev->serdev, false);
+ serdev_device_set_baudrate(btdev->serdev, INIT_BAUD_RATE);
+
+ gpiod_set_value_cansleep(btdev->reset, 0);
+
+ /* wait for cts */
+ err = serdev_device_wait_for_cts(btdev->serdev, true, 200);
+ if (err < 0) {
+ dev_err(dev, "CTS not received: %d", err);
+ return err;
+ }
+
+ nokia_flow_control(btdev->serdev, true);
+
+ return 0;
+}
+
+static int nokia_send_alive_packet(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ struct hci_nokia_alive_hdr *hdr;
+ struct hci_nokia_alive_pkt *pkt;
+ struct sk_buff *skb;
+ int len;
+
+ init_completion(&btdev->init_completion);
+
+ len = H4_TYPE_SIZE + sizeof(*hdr) + sizeof(*pkt);
+ skb = bt_skb_alloc(len, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ hci_skb_pkt_type(skb) = HCI_NOKIA_ALIVE_PKT;
+ memset(skb->data, 0x00, len);
+
+ hdr = (struct hci_nokia_alive_hdr *)skb_put(skb, sizeof(*hdr));
+ hdr->dlen = sizeof(*pkt);
+ pkt = (struct hci_nokia_alive_pkt *)skb_put(skb, sizeof(*pkt));
+ pkt->mid = NOKIA_ALIVE_REQ;
+
+ nokia_enqueue(hu, skb);
+ hci_uart_tx_wakeup(hu);
+
+ dev_dbg(dev, "Alive sent");
+
+ if (!wait_for_completion_interruptible_timeout(&btdev->init_completion,
+ msecs_to_jiffies(1000))) {
+ return -ETIMEDOUT;
+ }
+
+ if (btdev->init_error < 0)
+ return btdev->init_error;
+
+ return 0;
+}
+
+static int nokia_send_negotiation(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ struct hci_nokia_neg_cmd *neg_cmd;
+ struct hci_nokia_neg_hdr *neg_hdr;
+ struct sk_buff *skb;
+ int len, err;
+ u16 baud = DIV_ROUND_CLOSEST(btdev->sysclk_speed * 10, SETUP_BAUD_RATE);
+ int sysclk = btdev->sysclk_speed / 1000;
+
+ len = H4_TYPE_SIZE + sizeof(*neg_hdr) + sizeof(*neg_cmd);
+ skb = bt_skb_alloc(len, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ hci_skb_pkt_type(skb) = HCI_NOKIA_NEG_PKT;
+
+ neg_hdr = (struct hci_nokia_neg_hdr *)skb_put(skb, sizeof(*neg_hdr));
+ neg_hdr->dlen = sizeof(*neg_cmd);
+
+ neg_cmd = (struct hci_nokia_neg_cmd *)skb_put(skb, sizeof(*neg_cmd));
+ neg_cmd->ack = NOKIA_NEG_REQ;
+ neg_cmd->baud = cpu_to_le16(baud);
+ neg_cmd->unused1 = 0x0000;
+ neg_cmd->proto = NOKIA_PROTO_BYTE;
+ neg_cmd->sys_clk = cpu_to_le16(sysclk);
+ neg_cmd->unused2 = 0x0000;
+
+ btdev->init_error = 0;
+ init_completion(&btdev->init_completion);
+
+ nokia_enqueue(hu, skb);
+ hci_uart_tx_wakeup(hu);
+
+ dev_dbg(dev, "Negotiation sent");
+
+ if (!wait_for_completion_interruptible_timeout(&btdev->init_completion,
+ msecs_to_jiffies(10000))) {
+ return -ETIMEDOUT;
+ }
+
+ if (btdev->init_error < 0)
+ return btdev->init_error;
+
+ /* Change to previously negotiated speed. Flow Control
+ * is disabled until bluetooth adapter is ready to avoid
+ * broken bytes being received.
+ */
+ nokia_flow_control(btdev->serdev, false);
+ serdev_device_set_baudrate(btdev->serdev, SETUP_BAUD_RATE);
+ err = serdev_device_wait_for_cts(btdev->serdev, true, 200);
+ if (err < 0) {
+ dev_err(dev, "CTS not received: %d", err);
+ return err;
+ }
+ nokia_flow_control(btdev->serdev, true);
+
+ dev_dbg(dev, "Negotiation successful");
+
+ return 0;
+}
+
+static int nokia_setup_fw(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ const char *fwname;
+ const struct firmware *fw;
+ const u8 *fw_ptr;
+ size_t fw_size;
+ int err;
+
+ dev_dbg(dev, "setup firmware");
+
+ if (btdev->man_id == NOKIA_ID_BCM2048) {
+ fwname = FIRMWARE_BCM2048;
+ } else if (btdev->man_id == NOKIA_ID_TI1271) {
+ fwname = FIRMWARE_TI1271;
+ } else {
+ dev_err(dev, "Unsupported bluetooth device!");
+ return -ENODEV;
+ }
+
+ err = request_firmware(&fw, fwname, dev);
+ if (err < 0) {
+ dev_err(dev, "%s: Failed to load Nokia firmware file (%d)",
+ hu->hdev->name, err);
+ return err;
+ }
+
+ fw_ptr = fw->data;
+ fw_size = fw->size;
+
+ while (fw_size >= 4) {
+ u16 pkt_size = get_unaligned_le16(fw_ptr);
+ u8 pkt_type = fw_ptr[2];
+ const struct hci_command_hdr *cmd;
+ u16 opcode;
+ struct sk_buff *skb;
+
+ switch (pkt_type) {
+ case HCI_COMMAND_PKT:
+ cmd = (struct hci_command_hdr *)(fw_ptr + 3);
+ opcode = le16_to_cpu(cmd->opcode);
+
+ skb = __hci_cmd_sync(hu->hdev, opcode, cmd->plen,
+ fw_ptr + 3 + HCI_COMMAND_HDR_SIZE,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ dev_err(dev, "%s: FW command %04x failed (%d)",
+ hu->hdev->name, opcode, err);
+ goto done;
+ }
+ kfree_skb(skb);
+ break;
+ case HCI_NOKIA_RADIO_PKT:
+ case HCI_NOKIA_NEG_PKT:
+ case HCI_NOKIA_ALIVE_PKT:
+ break;
+ }
+
+ fw_ptr += pkt_size + 2;
+ fw_size -= pkt_size + 2;
+ }
+
+done:
+ release_firmware(fw);
+ return err;
+}
+
+static int nokia_setup(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ int err;
+
+ btdev->initialized = false;
+
+ nokia_flow_control(btdev->serdev, false);
+
+ pm_runtime_get_sync(dev);
+
+ if (btdev->tx_enabled) {
+ gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
+ pm_runtime_put(&btdev->serdev->dev);
+ btdev->tx_enabled = false;
+ }
+
+ dev_dbg(dev, "protocol setup");
+
+ /* 0. reset connection */
+ err = nokia_reset(hu);
+ if (err < 0) {
+ dev_err(dev, "Reset failed: %d", err);
+ goto out;
+ }
+
+ /* 1. negotiate speed etc */
+ err = nokia_send_negotiation(hu);
+ if (err < 0) {
+ dev_err(dev, "Negotiation failed: %d", err);
+ goto out;
+ }
+
+ /* 2. verify correct setup using alive packet */
+ err = nokia_send_alive_packet(hu);
+ if (err < 0) {
+ dev_err(dev, "Alive check failed: %d", err);
+ goto out;
+ }
+
+ /* 3. send firmware */
+ err = nokia_setup_fw(hu);
+ if (err < 0) {
+ dev_err(dev, "Could not setup FW: %d", err);
+ goto out;
+ }
+
+ nokia_flow_control(btdev->serdev, false);
+ serdev_device_set_baudrate(btdev->serdev, MAX_BAUD_RATE);
+ nokia_flow_control(btdev->serdev, true);
+
+ if (btdev->man_id == NOKIA_ID_BCM2048) {
+ hu->hdev->set_bdaddr = btbcm_set_bdaddr;
+ set_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks);
+ dev_dbg(dev, "bcm2048 has invalid bluetooth address!");
+ }
+
+ dev_dbg(dev, "protocol setup done!");
+
+ gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
+ pm_runtime_put(dev);
+ btdev->tx_enabled = false;
+ btdev->initialized = true;
+
+ return 0;
+out:
+ pm_runtime_put(dev);
+
+ return err;
+}
+
+static int nokia_open(struct hci_uart *hu)
+{
+ struct device *dev = &hu->serdev->dev;
+
+ dev_dbg(dev, "protocol open");
+
+ serdev_device_open(hu->serdev);
+
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static int nokia_flush(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+
+ dev_dbg(&btdev->serdev->dev, "flush device");
+
+ skb_queue_purge(&btdev->txq);
+
+ return 0;
+}
+
+static int nokia_close(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+
+ dev_dbg(dev, "close device");
+
+ btdev->initialized = false;
+
+ skb_queue_purge(&btdev->txq);
+
+ kfree_skb(btdev->rx_skb);
+
+ /* disable module */
+ gpiod_set_value(btdev->reset, 1);
+ gpiod_set_value(btdev->wakeup_bt, 0);
+
+ pm_runtime_disable(&btdev->serdev->dev);
+ serdev_device_close(btdev->serdev);
+
+ return 0;
+}
+
+/* Enqueue frame for transmittion (padding, crc, etc) */
+static int nokia_enqueue(struct hci_uart *hu, struct sk_buff *skb)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ int err;
+
+ /* Prepend skb with frame type */
+ memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+
+ /* Packets must be word aligned */
+ if (skb->len % 2) {
+ err = skb_pad(skb, 1);
+ if (err)
+ return err;
+ *skb_put(skb, 1) = 0x00;
+ }
+
+ skb_queue_tail(&btdev->txq, skb);
+
+ return 0;
+}
+
+static int nokia_recv_negotiation_packet(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ struct hci_nokia_neg_hdr *hdr;
+ struct hci_nokia_neg_evt *evt;
+ int ret = 0;
+
+ hdr = (struct hci_nokia_neg_hdr *)skb->data;
+ if (hdr->dlen != sizeof(*evt)) {
+ btdev->init_error = -EIO;
+ ret = -EIO;
+ goto finish_neg;
+ }
+
+ evt = (struct hci_nokia_neg_evt *)skb_pull(skb, sizeof(*hdr));
+
+ if (evt->ack != NOKIA_NEG_ACK) {
+ dev_err(dev, "Negotiation received: wrong reply");
+ btdev->init_error = -EINVAL;
+ ret = -EINVAL;
+ goto finish_neg;
+ }
+
+ btdev->man_id = evt->man_id;
+ btdev->ver_id = evt->ver_id;
+
+ dev_dbg(dev, "Negotiation received: baud=%u:clk=%u:manu=%u:vers=%u",
+ evt->baud, evt->sys_clk, evt->man_id, evt->ver_id);
+
+finish_neg:
+ complete(&btdev->init_completion);
+ kfree_skb(skb);
+ return ret;
+}
+
+static int nokia_recv_alive_packet(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ struct hci_nokia_alive_hdr *hdr;
+ struct hci_nokia_alive_pkt *pkt;
+ int ret = 0;
+
+ hdr = (struct hci_nokia_alive_hdr *)skb->data;
+ if (hdr->dlen != sizeof(*pkt)) {
+ dev_err(dev, "Corrupted alive message");
+ btdev->init_error = -EIO;
+ ret = -EIO;
+ goto finish_alive;
+ }
+
+ pkt = (struct hci_nokia_alive_pkt *)skb_pull(skb, sizeof(*hdr));
+
+ if (pkt->mid != NOKIA_ALIVE_RESP) {
+ dev_err(dev, "Alive received: invalid response: 0x%02x!",
+ pkt->mid);
+ btdev->init_error = -EINVAL;
+ ret = -EINVAL;
+ goto finish_alive;
+ }
+
+ dev_dbg(dev, "Alive received");
+
+finish_alive:
+ complete(&btdev->init_completion);
+ kfree_skb(skb);
+ return ret;
+}
+
+static int nokia_recv_radio(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ /* Packets received on the dedicated radio channel are
+ * HCI events and so feed them back into the core.
+ */
+ hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
+ return hci_recv_frame(hdev, skb);
+}
+
+/* Recv data */
+static const struct h4_recv_pkt nokia_recv_pkts[] = {
+ { H4_RECV_ACL, .recv = hci_recv_frame },
+ { H4_RECV_SCO, .recv = hci_recv_frame },
+ { H4_RECV_EVENT, .recv = hci_recv_frame },
+ { NOKIA_RECV_ALIVE, .recv = nokia_recv_alive_packet },
+ { NOKIA_RECV_NEG, .recv = nokia_recv_negotiation_packet },
+ { NOKIA_RECV_RADIO, .recv = nokia_recv_radio },
+};
+
+static int nokia_recv(struct hci_uart *hu, const void *data, int count)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ int err;
+
+ if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
+ return -EUNATCH;
+
+ btdev->rx_skb = h4_recv_buf(hu->hdev, btdev->rx_skb, data, count,
+ nokia_recv_pkts, ARRAY_SIZE(nokia_recv_pkts));
+ if (IS_ERR(btdev->rx_skb)) {
+ err = PTR_ERR(btdev->rx_skb);
+ dev_err(dev, "Frame reassembly failed (%d)", err);
+ btdev->rx_skb = NULL;
+ return err;
+ }
+
+ return count;
+}
+
+static struct sk_buff *nokia_dequeue(struct hci_uart *hu)
+{
+ struct nokia_bt_dev *btdev = hu->priv;
+ struct device *dev = &btdev->serdev->dev;
+ struct sk_buff *result = skb_dequeue(&btdev->txq);
+
+ if (!btdev->initialized)
+ return result;
+
+ if (btdev->tx_enabled == !!result)
+ return result;
+
+ if (result) {
+ pm_runtime_get_sync(dev);
+ gpiod_set_value_cansleep(btdev->wakeup_bt, 1);
+ } else {
+ serdev_device_wait_until_sent(btdev->serdev, 0);
+ gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
+ pm_runtime_put(dev);
+ }
+
+ btdev->tx_enabled = !!result;
+
+ return result;
+}
+
+static const struct hci_uart_proto nokia_proto = {
+ .id = HCI_UART_NOKIA,
+ .name = "Nokia",
+ .open = nokia_open,
+ .close = nokia_close,
+ .recv = nokia_recv,
+ .enqueue = nokia_enqueue,
+ .dequeue = nokia_dequeue,
+ .flush = nokia_flush,
+ .setup = nokia_setup,
+ .manufacturer = 1,
+};
+
+static int nokia_bluetooth_serdev_probe(struct serdev_device *serdev)
+{
+ struct device *dev = &serdev->dev;
+ struct nokia_bt_dev *btdev;
+ struct clk *sysclk;
+ int err = 0;
+
+ btdev = devm_kzalloc(dev, sizeof(*btdev), GFP_KERNEL);
+ if (!btdev)
+ return -ENOMEM;
+
+ btdev->hu.serdev = btdev->serdev = serdev;
+ serdev_device_set_drvdata(serdev, btdev);
+
+ btdev->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(btdev->reset)) {
+ err = PTR_ERR(btdev->reset);
+ dev_err(dev, "could not get reset gpio: %d", err);
+ return err;
+ }
+
+ btdev->wakeup_host = devm_gpiod_get(dev, "host-wakeup", GPIOD_IN);
+ if (IS_ERR(btdev->wakeup_host)) {
+ err = PTR_ERR(btdev->wakeup_host);
+ dev_err(dev, "could not get host wakeup gpio: %d", err);
+ return err;
+ }
+
+ btdev->wake_irq = gpiod_to_irq(btdev->wakeup_host);
+
+ err = devm_request_threaded_irq(dev, btdev->wake_irq, NULL,
+ wakeup_handler,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "wakeup", btdev);
+ if (err) {
+ dev_err(dev, "could request wakeup irq: %d", err);
+ return err;
+ }
+
+ btdev->wakeup_bt = devm_gpiod_get(dev, "bluetooth-wakeup",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(btdev->wakeup_bt)) {
+ err = PTR_ERR(btdev->wakeup_bt);
+ dev_err(dev, "could not get BT wakeup gpio: %d", err);
+ return err;
+ }
+
+ sysclk = devm_clk_get(dev, "sysclk");
+ if (IS_ERR(sysclk)) {
+ err = PTR_ERR(sysclk);
+ dev_err(dev, "could not get sysclk: %d", err);
+ return err;
+ }
+
+ clk_prepare_enable(sysclk);
+ btdev->sysclk_speed = clk_get_rate(sysclk);
+ clk_disable_unprepare(sysclk);
+
+ skb_queue_head_init(&btdev->txq);
+
+ btdev->hu.priv = btdev;
+ btdev->hu.alignment = 2; /* Nokia H4+ is word aligned */
+
+ err = hci_uart_register_device(&btdev->hu, &nokia_proto);
+ if (err) {
+ dev_err(dev, "could not register bluetooth uart: %d", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static void nokia_bluetooth_serdev_remove(struct serdev_device *serdev)
+{
+ struct nokia_bt_dev *btdev = serdev_device_get_drvdata(serdev);
+ struct hci_uart *hu = &btdev->hu;
+ struct hci_dev *hdev = hu->hdev;
+
+ cancel_work_sync(&hu->write_work);
+
+ hci_unregister_dev(hdev);
+ hci_free_dev(hdev);
+ hu->proto->close(hu);
+
+ pm_runtime_disable(&btdev->serdev->dev);
+}
+
+static int nokia_bluetooth_runtime_suspend(struct device *dev)
+{
+ struct serdev_device *serdev = to_serdev_device(dev);
+
+ nokia_flow_control(serdev, false);
+ return 0;
+}
+
+static int nokia_bluetooth_runtime_resume(struct device *dev)
+{
+ struct serdev_device *serdev = to_serdev_device(dev);
+
+ nokia_flow_control(serdev, true);
+ return 0;
+}
+
+static const struct dev_pm_ops nokia_bluetooth_pm_ops = {
+ SET_RUNTIME_PM_OPS(nokia_bluetooth_runtime_suspend,
+ nokia_bluetooth_runtime_resume,
+ NULL)
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id nokia_bluetooth_of_match[] = {
+ { .compatible = "nokia,h4p-bluetooth", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, nokia_bluetooth_of_match);
+#endif
+
+static struct serdev_device_driver nokia_bluetooth_serdev_driver = {
+ .probe = nokia_bluetooth_serdev_probe,
+ .remove = nokia_bluetooth_serdev_remove,
+ .driver = {
+ .name = "nokia-bluetooth",
+ .pm = &nokia_bluetooth_pm_ops,
+ .of_match_table = of_match_ptr(nokia_bluetooth_of_match),
+ },
+};
+
+module_serdev_device_driver(nokia_bluetooth_serdev_driver);
+
+MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");
+MODULE_DESCRIPTION("Bluetooth HCI UART Nokia H4+ driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c
new file mode 100644
index 000000000000..7de0edc0ff8c
--- /dev/null
+++ b/drivers/bluetooth/hci_serdev.c
@@ -0,0 +1,356 @@
+/*
+ * Bluetooth HCI serdev driver lib
+ *
+ * Copyright (C) 2017 Linaro, Ltd., Rob Herring <robh@kernel.org>
+ *
+ * Based on hci_ldisc.c:
+ *
+ * Copyright (C) 2000-2001 Qualcomm Incorporated
+ * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
+ * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org>
+ *
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <linux/serdev.h>
+#include <linux/skbuff.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "hci_uart.h"
+
+struct serdev_device_ops hci_serdev_client_ops;
+
+static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type)
+{
+ struct hci_dev *hdev = hu->hdev;
+
+ /* Update HCI stat counters */
+ switch (pkt_type) {
+ case HCI_COMMAND_PKT:
+ hdev->stat.cmd_tx++;
+ break;
+
+ case HCI_ACLDATA_PKT:
+ hdev->stat.acl_tx++;
+ break;
+
+ case HCI_SCODATA_PKT:
+ hdev->stat.sco_tx++;
+ break;
+ }
+}
+
+static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
+{
+ struct sk_buff *skb = hu->tx_skb;
+
+ if (!skb)
+ skb = hu->proto->dequeue(hu);
+ else
+ hu->tx_skb = NULL;
+
+ return skb;
+}
+
+static void hci_uart_write_work(struct work_struct *work)
+{
+ struct hci_uart *hu = container_of(work, struct hci_uart, write_work);
+ struct serdev_device *serdev = hu->serdev;
+ struct hci_dev *hdev = hu->hdev;
+ struct sk_buff *skb;
+
+ /* REVISIT:
+ * should we cope with bad skbs or ->write() returning an error value?
+ */
+ do {
+ clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
+
+ while ((skb = hci_uart_dequeue(hu))) {
+ int len;
+
+ len = serdev_device_write_buf(serdev,
+ skb->data, skb->len);
+ hdev->stat.byte_tx += len;
+
+ skb_pull(skb, len);
+ if (skb->len) {
+ hu->tx_skb = skb;
+ break;
+ }
+
+ hci_uart_tx_complete(hu, hci_skb_pkt_type(skb));
+ kfree_skb(skb);
+ }
+ } while(test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state));
+
+ clear_bit(HCI_UART_SENDING, &hu->tx_state);
+}
+
+/* ------- Interface to HCI layer ------ */
+
+/* Initialize device */
+static int hci_uart_open(struct hci_dev *hdev)
+{
+ BT_DBG("%s %p", hdev->name, hdev);
+
+ return 0;
+}
+
+/* Reset device */
+static int hci_uart_flush(struct hci_dev *hdev)
+{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+
+ BT_DBG("hdev %p serdev %p", hdev, hu->serdev);
+
+ if (hu->tx_skb) {
+ kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
+ }
+
+ /* Flush any pending characters in the driver and discipline. */
+ serdev_device_write_flush(hu->serdev);
+
+ if (test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ hu->proto->flush(hu);
+
+ return 0;
+}
+
+/* Close device */
+static int hci_uart_close(struct hci_dev *hdev)
+{
+ BT_DBG("hdev %p", hdev);
+
+ hci_uart_flush(hdev);
+ hdev->flush = NULL;
+
+ return 0;
+}
+
+/* Send frames from HCI layer */
+static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+
+ BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb),
+ skb->len);
+
+ hu->proto->enqueue(hu, skb);
+
+ hci_uart_tx_wakeup(hu);
+
+ return 0;
+}
+
+static int hci_uart_setup(struct hci_dev *hdev)
+{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+ struct hci_rp_read_local_version *ver;
+ struct sk_buff *skb;
+ unsigned int speed;
+ int err;
+
+ /* 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)
+ serdev_device_set_baudrate(hu->serdev, 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 (hu->proto->set_baudrate && speed) {
+ err = hu->proto->set_baudrate(hu, speed);
+ if (err)
+ BT_ERR("%s: failed to set baudrate", hdev->name);
+ else
+ serdev_device_set_baudrate(hu->serdev, speed);
+ }
+
+ if (hu->proto->setup)
+ return hu->proto->setup(hu);
+
+ if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags))
+ return 0;
+
+ skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ BT_ERR("%s: Reading local version information failed (%ld)",
+ hdev->name, PTR_ERR(skb));
+ return 0;
+ }
+
+ if (skb->len != sizeof(*ver)) {
+ BT_ERR("%s: Event length mismatch for version information",
+ hdev->name);
+ }
+
+ kfree_skb(skb);
+ return 0;
+}
+
+/** hci_uart_write_wakeup - transmit buffer wakeup
+ * @serdev: serial device
+ *
+ * This function is called by the serdev framework when it accepts
+ * more data being sent.
+ */
+static void hci_uart_write_wakeup(struct serdev_device *serdev)
+{
+ struct hci_uart *hu = serdev_device_get_drvdata(serdev);
+
+ BT_DBG("");
+
+ if (!hu || serdev != hu->serdev) {
+ WARN_ON(1);
+ return;
+ }
+
+ if (test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ hci_uart_tx_wakeup(hu);
+}
+
+/** hci_uart_receive_buf - receive buffer wakeup
+ * @serdev: serial device
+ * @data: pointer to received data
+ * @count: count of received data in bytes
+ *
+ * This function is called by the serdev framework when it received data
+ * in the RX buffer.
+ *
+ * Return: number of processed bytes
+ */
+static int hci_uart_receive_buf(struct serdev_device *serdev, const u8 *data,
+ size_t count)
+{
+ struct hci_uart *hu = serdev_device_get_drvdata(serdev);
+
+ if (!hu || serdev != hu->serdev) {
+ WARN_ON(1);
+ return 0;
+ }
+
+ if (!test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ return 0;
+
+ /* It does not need a lock here as it is already protected by a mutex in
+ * tty caller
+ */
+ hu->proto->recv(hu, data, count);
+
+ if (hu->hdev)
+ hu->hdev->stat.byte_rx += count;
+
+ return count;
+}
+
+struct serdev_device_ops hci_serdev_client_ops = {
+ .receive_buf = hci_uart_receive_buf,
+ .write_wakeup = hci_uart_write_wakeup,
+};
+
+int hci_uart_register_device(struct hci_uart *hu,
+ const struct hci_uart_proto *p)
+{
+ int err;
+ struct hci_dev *hdev;
+
+ BT_DBG("");
+
+ serdev_device_set_client_ops(hu->serdev, &hci_serdev_client_ops);
+
+ err = p->open(hu);
+ if (err)
+ return err;
+
+ hu->proto = p;
+ set_bit(HCI_UART_PROTO_READY, &hu->flags);
+
+ /* Initialize and register HCI device */
+ hdev = hci_alloc_dev();
+ if (!hdev) {
+ BT_ERR("Can't allocate HCI device");
+ err = -ENOMEM;
+ goto err_alloc;
+ }
+
+ hu->hdev = hdev;
+
+ hdev->bus = HCI_UART;
+ hci_set_drvdata(hdev, hu);
+
+ INIT_WORK(&hu->write_work, hci_uart_write_work);
+
+ /* Only when vendor specific setup callback is provided, consider
+ * the manufacturer information valid. This avoids filling in the
+ * value for Ericsson when nothing is specified.
+ */
+ if (hu->proto->setup)
+ hdev->manufacturer = hu->proto->manufacturer;
+
+ hdev->open = hci_uart_open;
+ hdev->close = hci_uart_close;
+ hdev->flush = hci_uart_flush;
+ hdev->send = hci_uart_send_frame;
+ hdev->setup = hci_uart_setup;
+ SET_HCIDEV_DEV(hdev, &hu->serdev->dev);
+
+ if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
+ set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
+
+ if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags))
+ set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks);
+
+ if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags))
+ set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
+
+ if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags))
+ hdev->dev_type = HCI_AMP;
+ else
+ hdev->dev_type = HCI_PRIMARY;
+
+ if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
+ return 0;
+
+ if (hci_register_dev(hdev) < 0) {
+ BT_ERR("Can't register HCI device");
+ err = -ENODEV;
+ goto err_register;
+ }
+
+ set_bit(HCI_UART_REGISTERED, &hu->flags);
+
+ return 0;
+
+err_register:
+ hci_free_dev(hdev);
+err_alloc:
+ clear_bit(HCI_UART_PROTO_READY, &hu->flags);
+ p->close(hu);
+ return err;
+}
+EXPORT_SYMBOL_GPL(hci_uart_register_device);
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index 070139513e65..2b05e557fad0 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -58,6 +58,7 @@
#define HCI_UART_VND_DETECT 5
struct hci_uart;
+struct serdev_device;
struct hci_uart_proto {
unsigned int id;
@@ -77,6 +78,7 @@ struct hci_uart_proto {
struct hci_uart {
struct tty_struct *tty;
+ struct serdev_device *serdev;
struct hci_dev *hdev;
unsigned long flags;
unsigned long hdev_flags;
@@ -92,6 +94,9 @@ struct hci_uart {
unsigned int init_speed;
unsigned int oper_speed;
+
+ u8 alignment;
+ u8 padding;
};
/* HCI_UART proto flag bits */
@@ -105,9 +110,10 @@ struct hci_uart {
int hci_uart_register_proto(const struct hci_uart_proto *p);
int hci_uart_unregister_proto(const struct hci_uart_proto *p);
+int hci_uart_register_device(struct hci_uart *hu, const struct hci_uart_proto *p);
+
int hci_uart_tx_wakeup(struct hci_uart *hu);
int hci_uart_init_ready(struct hci_uart *hu);
-void hci_uart_init_tty(struct hci_uart *hu);
void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);
void hci_uart_set_flow_control(struct hci_uart *hu, bool enable);
void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.