Merge tag 'for-net-next-2022-07-22' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next

Luiz Augusto von Dentz says:

====================
bluetooth-next pull request for net-next:

 - Add support for IM Networks PID 0x3568
 - Add support for BCM4349B1
 - Add support for CYW55572
 - Add support for MT7922 VID/PID 0489/e0e2
 - Add support for Realtek RTL8852C
 - Initial support for Isochronous Channels/ISO sockets
 - Remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING quirk

* tag 'for-net-next-2022-07-22' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next: (58 commits)
  Bluetooth: btusb: Detect if an ACL packet is in fact an ISO packet
  Bluetooth: btusb: Add support for ISO packets
  Bluetooth: ISO: Add broadcast support
  Bluetooth: Add initial implementation of BIS connections
  Bluetooth: Add BTPROTO_ISO socket type
  Bluetooth: Add initial implementation of CIS connections
  Bluetooth: hci_core: Introduce hci_recv_event_data
  Bluetooth: Convert delayed discov_off to hci_sync
  Bluetooth: Remove update_scan hci_request dependancy
  Bluetooth: Remove dead code from hci_request.c
  Bluetooth: btrtl: Fix typo in comment
  Bluetooth: MGMT: Fix holding hci_conn reference while command is queued
  Bluetooth: mgmt: Fix using hci_conn_abort
  Bluetooth: Use bt_status to convert from errno
  Bluetooth: Add bt_status
  Bluetooth: hci_sync: Split hci_dev_open_sync
  Bluetooth: hci_sync: Refactor remove Adv Monitor
  Bluetooth: hci_sync: Refactor add Adv Monitor
  Bluetooth: hci_sync: Remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING
  Bluetooth: btusb: Remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING for fake CSR
  ...
====================

Link: https://lore.kernel.org/r/20220723002232.964796-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 28 insertions, 7 deletions

diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 785f445dd60d..d7e0b75db8a6 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -53,10 +53,12 @@
  * struct bcm_device_data - device specific data
  * @no_early_set_baudrate: Disallow set baudrate before driver setup()
  * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
+ * @max_autobaud_speed: max baudrate supported by device in autobaud mode
  */
 struct bcm_device_data {
 	bool	no_early_set_baudrate;
 	bool	drive_rts_on_open;
+	u32	max_autobaud_speed;
 };
 
 /**
@@ -99,6 +101,8 @@ struct bcm_device_data {
  * @no_early_set_baudrate: don't set_baudrate before setup()
  * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
  * @pcm_int_params: keep the initial PCM configuration
+ * @use_autobaud_mode: start Bluetooth device in autobaud mode
+ * @max_autobaud_speed: max baudrate supported by device in autobaud mode
  */
 struct bcm_device {
 	/* Must be the first member, hci_serdev.c expects this. */
@@ -136,7 +140,9 @@ struct bcm_device {
 #endif
 	bool			no_early_set_baudrate;
 	bool			drive_rts_on_open;
+	bool			use_autobaud_mode;
 	u8			pcm_int_params[5];
+	u32			max_autobaud_speed;
 };
 
 /* generic bcm uart resources */
@@ -472,15 +478,20 @@ static int bcm_open(struct hci_uart *hu)
 
 out:
 	if (bcm->dev) {
-		if (bcm->dev->drive_rts_on_open)
+		if (bcm->dev->use_autobaud_mode)
+			hci_uart_set_flow_control(hu, false);	/* Assert BT_UART_CTS_N */
+		else if (bcm->dev->drive_rts_on_open)
 			hci_uart_set_flow_control(hu, true);
 
-		hu->init_speed = bcm->dev->init_speed;
+		if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed)
+			hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed);
+		else
+			hu->init_speed = bcm->dev->init_speed;
 
 		/* If oper_speed is set, ldisc/serdev will set the baudrate
 		 * before calling setup()
 		 */
-		if (!bcm->dev->no_early_set_baudrate)
+		if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode)
 			hu->oper_speed = bcm->dev->oper_speed;
 
 		err = bcm_gpio_set_power(bcm->dev, true);
@@ -564,6 +575,7 @@ static int bcm_setup(struct hci_uart *hu)
 {
 	struct bcm_data *bcm = hu->priv;
 	bool fw_load_done = false;
+	bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0);
 	unsigned int speed;
 	int err;
 
@@ -572,7 +584,7 @@ static int bcm_setup(struct hci_uart *hu)
 	hu->hdev->set_diag = bcm_set_diag;
 	hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 
-	err = btbcm_initialize(hu->hdev, &fw_load_done);
+	err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode);
 	if (err)
 		return err;
 
@@ -580,8 +592,8 @@ static int bcm_setup(struct hci_uart *hu)
 		return 0;
 
 	/* Init speed if any */
-	if (hu->init_speed)
-		speed = hu->init_speed;
+	if (bcm->dev && bcm->dev->init_speed)
+		speed = bcm->dev->init_speed;
 	else if (hu->proto->init_speed)
 		speed = hu->proto->init_speed;
 	else
@@ -616,7 +628,7 @@ static int bcm_setup(struct hci_uart *hu)
 		btbcm_write_pcm_int_params(hu->hdev, &params);
 	}
 
-	err = btbcm_finalize(hu->hdev, &fw_load_done);
+	err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode);
 	if (err)
 		return err;
 
@@ -1197,6 +1209,8 @@ static int bcm_acpi_probe(struct bcm_device *dev)
 
 static int bcm_of_probe(struct bcm_device *bdev)
 {
+	bdev->use_autobaud_mode = device_property_read_bool(bdev->dev,
+							    "brcm,requires-autobaud-mode");
 	device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
 	device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
 				      bdev->pcm_int_params, 5);
@@ -1512,6 +1526,7 @@ static int bcm_serdev_probe(struct serdev_device *serdev)
 
 	data = device_get_match_data(bcmdev->dev);
 	if (data) {
+		bcmdev->max_autobaud_speed = data->max_autobaud_speed;
 		bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
 		bcmdev->drive_rts_on_open = data->drive_rts_on_open;
 	}
@@ -1535,6 +1550,10 @@ static struct bcm_device_data bcm43438_device_data = {
 	.drive_rts_on_open = true,
 };
 
+static struct bcm_device_data cyw55572_device_data = {
+	.max_autobaud_speed = 921600,
+};
+
 static const struct of_device_id bcm_bluetooth_of_match[] = {
 	{ .compatible = "brcm,bcm20702a1" },
 	{ .compatible = "brcm,bcm4329-bt" },
@@ -1544,8 +1563,10 @@ static const struct of_device_id bcm_bluetooth_of_match[] = {
 	{ .compatible = "brcm,bcm43430a0-bt" },
 	{ .compatible = "brcm,bcm43430a1-bt" },
 	{ .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
+	{ .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data },
 	{ .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
 	{ .compatible = "brcm,bcm4335a0" },
+	{ .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);