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authorBalakrishna Godavarthi <bgodavar@codeaurora.org>2018-08-03 17:46:29 +0530
committerMarcel Holtmann <marcel@holtmann.org>2018-08-03 14:44:07 +0200
commit83d9c5e56687a75cd75e537f97fb35009e9ba232 (patch)
treef6e722e95e93af52147486e9262e4072316fb5b5 /drivers/bluetooth
parentaadebac4639d84ee51a12f2a1706fea1e4760b81 (diff)
downloadlinux-83d9c5e56687a75cd75e537f97fb35009e9ba232.tar.bz2
Bluetooth: hci_qca: Add wrapper functions for setting UART speed
In function qca_setup, we set initial and operating speeds for Qualcomm Bluetooth SoC's. This block of code is common across different Qualcomm Bluetooth SoC's. Instead of duplicating the code, created a wrapper function to set the speeds. So that future coming SoC's can use these wrapper functions to set speeds. Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_qca.c93
1 files changed, 70 insertions, 23 deletions
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 6bc8cfb982a9..41278c5852e4 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -119,6 +119,11 @@ struct qca_data {
u64 votes_off;
};
+enum qca_speed_type {
+ QCA_INIT_SPEED = 1,
+ QCA_OPER_SPEED
+};
+
struct qca_serdev {
struct hci_uart serdev_hu;
struct gpio_desc *bt_en;
@@ -923,6 +928,61 @@ static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
hci_uart_set_baudrate(hu, speed);
}
+static unsigned int qca_get_speed(struct hci_uart *hu,
+ enum qca_speed_type speed_type)
+{
+ unsigned int speed = 0;
+
+ if (speed_type == QCA_INIT_SPEED) {
+ if (hu->init_speed)
+ speed = hu->init_speed;
+ else if (hu->proto->init_speed)
+ speed = hu->proto->init_speed;
+ } else {
+ if (hu->oper_speed)
+ speed = hu->oper_speed;
+ else if (hu->proto->oper_speed)
+ speed = hu->proto->oper_speed;
+ }
+
+ return speed;
+}
+
+static int qca_check_speeds(struct hci_uart *hu)
+{
+ if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
+ !qca_get_speed(hu, QCA_OPER_SPEED))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
+{
+ unsigned int speed, qca_baudrate;
+ int ret;
+
+ if (speed_type == QCA_INIT_SPEED) {
+ speed = qca_get_speed(hu, QCA_INIT_SPEED);
+ if (speed)
+ host_set_baudrate(hu, speed);
+ } else {
+ speed = qca_get_speed(hu, QCA_OPER_SPEED);
+ if (!speed)
+ return 0;
+
+ qca_baudrate = qca_get_baudrate_value(speed);
+ bt_dev_info(hu->hdev, "Set UART speed to %d", speed);
+ ret = qca_set_baudrate(hu->hdev, qca_baudrate);
+ if (ret)
+ return ret;
+
+ host_set_baudrate(hu, speed);
+ }
+
+ return 0;
+}
+
static int qca_setup(struct hci_uart *hu)
{
struct hci_dev *hdev = hu->hdev;
@@ -933,37 +993,24 @@ static int qca_setup(struct hci_uart *hu)
bt_dev_info(hdev, "ROME setup");
+ ret = qca_check_speeds(hu);
+ if (ret)
+ return ret;
+
/* Patch downloading has to be done without IBS mode */
clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
/* Setup initial baudrate */
- speed = 0;
- if (hu->init_speed)
- speed = hu->init_speed;
- else if (hu->proto->init_speed)
- speed = hu->proto->init_speed;
-
- if (speed)
- host_set_baudrate(hu, speed);
+ qca_set_speed(hu, QCA_INIT_SPEED);
/* Setup user speed if needed */
- speed = 0;
- if (hu->oper_speed)
- speed = hu->oper_speed;
- else if (hu->proto->oper_speed)
- speed = hu->proto->oper_speed;
-
+ speed = qca_get_speed(hu, QCA_OPER_SPEED);
if (speed) {
- qca_baudrate = qca_get_baudrate_value(speed);
-
- bt_dev_info(hdev, "Set UART speed to %d", speed);
- ret = qca_set_baudrate(hdev, qca_baudrate);
- if (ret) {
- bt_dev_err(hdev, "Failed to change the baud rate (%d)",
- ret);
+ ret = qca_set_speed(hu, QCA_OPER_SPEED);
+ if (ret)
return ret;
- }
- host_set_baudrate(hu, speed);
+
+ qca_baudrate = qca_get_baudrate_value(speed);
}
/* Get QCA version information */