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Message-ID: <fffdb002acce460c82b587f83e182860@infineon.com>
Date: Tue, 30 Jul 2024 05:32:18 +0000
From: <Nobuaki.Tsunashima@...ineon.com>
To: <luiz.dentz@...il.com>
CC: <marcel@...tmann.org>, <linux-bluetooth@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v5] Bluetooth: btbcm: Apply
HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER to CYW4373
Hello,
Please let me know if there are any additional actions needed from my end to facilitate progress on this patch.
Do you like to shorten names of original and newly added tables?
Your feedback would be greatly appreciated.
Thank you for your attention to this matter.
Best Regards,
Nobuaki Tsunashima
-----Original Message-----
From: Tsunashima Nobuaki (SMD C3 JP RM WLS AE)
Sent: Friday, July 5, 2024 11:07 AM
To: 'Luiz Augusto von Dentz' <luiz.dentz@...il.com>
Cc: Marcel Holtmann <marcel@...tmann.org>; linux-bluetooth@...r.kernel.org; linux-kernel@...r.kernel.org
Subject: RE: [PATCH v5] Bluetooth: btbcm: Apply HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER to CYW4373
Hi Luiz,
Thanks for your comment.
>> +#define BCM_ROMFW_BASELINE_NUM 0xFFFF static const struct
>> +bcm_chip_version_table disable_broken_read_transmit_power_by_chip_ver[] = {
>> + { 0x87, BCM_ROMFW_BASELINE_NUM } /* CYW4373/4373E */
>> +};
>
> Can we have a little less verbose names? e.g. broken_read_tx_power and btbcm_broken_read_tx_power sounds a lot better imo.
We already have a table named "disable_broken_read_transmit_power" as below.
> static const struct dmi_system_id disable_broken_read_transmit_power[] = {
> {
> .matches = {
> DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
> DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,1"),
> },
> },
So, as my new table is same role of the original table but referring chip version, I think the name is straight forward.
Or, we may shorten name of the original table as well like below. Do you like it?
Original table
static const struct dmi_system_id broken_read_tx_power_dmi[]
New table
static const struc bcm_chip_version_table broken_read_tx_power_chip_ver[]
Best Regards,
Nobuaki Tsunashima
--
---Original Message-----
From: Luiz Augusto von Dentz <luiz.dentz@...il.com>
Sent: Friday, July 5, 2024 10:34 AM
To: Tsunashima Nobuaki (SMD C3 JP RM WLS AE) <Nobuaki.Tsunashima@...ineon.com>
Cc: Marcel Holtmann <marcel@...tmann.org>; linux-bluetooth@...r.kernel.org; linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5] Bluetooth: btbcm: Apply HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER to CYW4373
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Hi Nobuaki,
On Thu, Jul 4, 2024 at 9:16 PM Nobuaki Tsunashima <nobuaki.tsunashima@...ineon.com> wrote:
>
> From: Nobuaki Tsunashima <Nobuaki.Tsunashima@...ineon.com>
>
> CYW4373 ROM FW has an issue that it claims LE_Read_Transmit_Power
> command as supported in a response of Read_Local_Supported_Command
> command but rejects the LE_Read_Transmit_Power command with "Unknown HCI Command"
> status. Because Bluetooth driver of kernel 5.11 added sending the
> LE_Read_Transmit_Power command in initialize phase, hci up fails due
> to the issue.
>
> Especially in USB i/f case, it would be difficult to download patch FW
> that includes its fix unless hci is up.
>
> The driver already contains infrastructure to apply the quirk for the
> issue, but currently it only supports DMI based matching. Add support
> to match by chip id and baseline FW version to detect CYW4373 ROM FW
> build in generic system.
>
> Fixes: 7c395ea521e6 ("Bluetooth: Query LE tx power on startup")
> Signed-off-by: Nobuaki Tsunashima <Nobuaki.Tsunashima@...ineon.com>
> ---
> V4 -> V5: Use skb_pull_data() to access skb->data as safer manner.
> V3 -> V4: Fix a few coding style warnings and refine comments for clarify.
> V2 -> V3: Fix a few coding style warnings and change the subject as more specific.
> V1 -> V2: Fix several coding style warnings.
>
> drivers/bluetooth/btbcm.c | 41
> +++++++++++++++++++++++++++++++++++++--
> drivers/bluetooth/btusb.c | 4 ++++
> 2 files changed, 43 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
> index 0a5445ac5e1b..dd7262a8dc8e 100644
> --- a/drivers/bluetooth/btbcm.c
> +++ b/drivers/bluetooth/btbcm.c
> @@ -437,16 +437,53 @@ static const struct dmi_system_id disable_broken_read_transmit_power[] = {
> { }
> };
>
> +struct bcm_chip_version_table {
> + u8 chip_id; /* Chip ID */
> + u16 baseline; /* Baseline version of patch FW */
> +};
> +#define BCM_ROMFW_BASELINE_NUM 0xFFFF static const struct
> +bcm_chip_version_table disable_broken_read_transmit_power_by_chip_ver[] = {
> + { 0x87, BCM_ROMFW_BASELINE_NUM } /* CYW4373/4373E */
> +};
Can we have a little less verbose names? e.g. broken_read_tx_power and btbcm_broken_read_tx_power sounds a lot better imo.
> +static bool btbcm_is_disable_broken_read_tx_power_by_chip_ver(u8
> +chip_id, u16 baseline) {
> + int i;
> + size_t table_size = ARRAY_SIZE(disable_broken_read_transmit_power_by_chip_ver);
> + const struct bcm_chip_version_table *entry =
> +
> +&disable_broken_read_transmit_power_by_chip_ver[0];
> +
> + for (i = 0 ; i < table_size ; i++, entry++) {
> + if ((chip_id == entry->chip_id) && (baseline == entry->baseline))
> + return true;
> + }
> +
> + return false;
> +}
> +
> static int btbcm_read_info(struct hci_dev *hdev) {
> struct sk_buff *skb;
> + u8 *chip_id;
> + u16 *baseline;
>
> /* Read Verbose Config Version Info */
> skb = btbcm_read_verbose_config(hdev);
> if (IS_ERR(skb))
> return PTR_ERR(skb);
> -
> - bt_dev_info(hdev, "BCM: chip id %u", skb->data[1]);
> + skb_pull_data(skb, 1);
> + chip_id = skb_pull_data(skb, sizeof(*chip_id));
> + skb_pull_data(skb, 1);
> + baseline = skb_pull_data(skb, sizeof(*baseline));
> +
> + if (chip_id) {
> + bt_dev_info(hdev, "BCM: chip id %u", *chip_id);
> +
> + if (baseline) {
> + /* Check Chip ID and disable broken Read LE Min/Max Tx Power */
> + if (btbcm_is_disable_broken_read_tx_power_by_chip_ver(*chip_id, *baseline))
> + set_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks);
> + }
> + }
> kfree_skb(skb);
>
> return 0;
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index d31edad7a056..52561c8d8828 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -142,6 +142,10 @@ static const struct usb_device_id btusb_table[] = {
> { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
> .driver_info = BTUSB_BCM_PATCHRAM },
>
> + /* Cypress devices with vendor specific id */
> + { USB_VENDOR_AND_INTERFACE_INFO(0x04b4, 0xff, 0x01, 0x01),
> + .driver_info = BTUSB_BCM_PATCHRAM },
> +
> /* Broadcom devices with vendor specific id */
> { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
> .driver_info = BTUSB_BCM_PATCHRAM },
> --
> 2.25.1
>
--
Luiz Augusto von Dentz
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