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62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
116 lines
3.7 KiB
Diff
116 lines
3.7 KiB
Diff
From 4c40c6ae0510be0fc9626d1717ff4163358cbfb2 Mon Sep 17 00:00:00 2001
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From: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
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Date: Tue, 26 Nov 2019 08:17:29 +0100
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Subject: [PATCH] Bluetooth: hci_bcm: Disallow set_baudrate for
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BCM4354
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commit 5d6f391073d5c1c903ac12be72c66b96b2ae93f4 upstream.
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Without updating the patchram, the BCM4354 does not support a higher
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operating speed. The normal bcm_setup follows the correct order
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(init_speed, patchram and then oper_speed) but the serdev driver will
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set the operating speed before calling the hu->setup function. Thus,
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for the BCM4354, don't set the operating speed before patchram.
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Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
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Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
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---
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drivers/bluetooth/hci_bcm.c | 31 +++++++++++++++++++++++++++++--
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1 file changed, 29 insertions(+), 2 deletions(-)
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--- a/drivers/bluetooth/hci_bcm.c
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+++ b/drivers/bluetooth/hci_bcm.c
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@@ -48,6 +48,14 @@
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#define BCM_NUM_SUPPLIES 2
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/**
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+ * struct bcm_device_data - device specific data
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+ * @no_early_set_baudrate: Disallow set baudrate before driver setup()
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+ */
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+struct bcm_device_data {
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+ bool no_early_set_baudrate;
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+};
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+
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+/**
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* struct bcm_device - device driver resources
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* @serdev_hu: HCI UART controller struct
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* @list: bcm_device_list node
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@@ -79,6 +87,7 @@
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* @hu: pointer to HCI UART controller struct,
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* used to disable flow control during runtime suspend and system sleep
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* @is_suspended: whether flow control is currently disabled
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+ * @no_early_set_baudrate: don't set_baudrate before setup()
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*/
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struct bcm_device {
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/* Must be the first member, hci_serdev.c expects this. */
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@@ -113,6 +122,7 @@ struct bcm_device {
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struct hci_uart *hu;
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bool is_suspended;
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#endif
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+ bool no_early_set_baudrate;
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};
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/* generic bcm uart resources */
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@@ -450,7 +460,13 @@ out:
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if (bcm->dev) {
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hci_uart_set_flow_control(hu, true);
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hu->init_speed = bcm->dev->init_speed;
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- hu->oper_speed = bcm->dev->oper_speed;
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+
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+ /* If oper_speed is set, ldisc/serdev will set the baudrate
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+ * before calling setup()
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+ */
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+ if (!bcm->dev->no_early_set_baudrate)
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+ hu->oper_speed = bcm->dev->oper_speed;
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+
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err = bcm_gpio_set_power(bcm->dev, true);
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hci_uart_set_flow_control(hu, false);
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if (err)
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@@ -568,6 +584,8 @@ static int bcm_setup(struct hci_uart *hu
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/* Operational speed if any */
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if (hu->oper_speed)
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speed = hu->oper_speed;
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+ else if (bcm->dev && bcm->dev->oper_speed)
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+ speed = bcm->dev->oper_speed;
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else if (hu->proto->oper_speed)
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speed = hu->proto->oper_speed;
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else
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@@ -1377,6 +1395,7 @@ static struct platform_driver bcm_driver
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static int bcm_serdev_probe(struct serdev_device *serdev)
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{
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struct bcm_device *bcmdev;
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+ const struct bcm_device_data *data;
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int err;
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bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
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@@ -1411,6 +1430,10 @@ static int bcm_serdev_probe(struct serde
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if (err)
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dev_err(&serdev->dev, "Failed to power down\n");
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+ data = device_get_match_data(bcmdev->dev);
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+ if (data)
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+ bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
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+
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return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
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}
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@@ -1422,12 +1445,16 @@ static void bcm_serdev_remove(struct ser
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}
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#ifdef CONFIG_OF
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+static struct bcm_device_data bcm4354_device_data = {
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+ .no_early_set_baudrate = true,
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+};
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+
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static const struct of_device_id bcm_bluetooth_of_match[] = {
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{ .compatible = "brcm,bcm20702a1" },
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{ .compatible = "brcm,bcm4345c5" },
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{ .compatible = "brcm,bcm4330-bt" },
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{ .compatible = "brcm,bcm43438-bt" },
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- { .compatible = "brcm,bcm43540-bt" },
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+ { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
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{ .compatible = "brcm,bcm4335a0" },
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{ },
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};
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