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Message-ID: <38479690-e44f-6154-df32-f08e17ef36c3@molgen.mpg.de>
Date:   Thu, 25 May 2023 15:39:58 +0200
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From:   Paul Menzel <pmenzel@molgen.mpg.de>
Subject: Re: [PATCH v6] Bluetooth: hci_qca: Add support for Qualcomm Bluetooth
 SoC QCA2066
To:     Tim Jiang <quic_tjiang@quicinc.com>
Cc:     marcel@holtmann.org, linux-kernel@vger.kernel.org,
        linux-bluetooth@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        quic_bgodavar@quicinc.com, quic_hemantg@quicinc.com,
        mka@chromium.org
References: <20230524072733.23955-1-quic_tjiang@quicinc.com>
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In-Reply-To: <20230524072733.23955-1-quic_tjiang@quicinc.com>
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Dear Tim,


Thank you for the patch.

Am 24.05.23 um 09:27 schrieb Tim Jiang:
> This patch adds support for QCA2066 firmware patch and nvm downloading.
> as the RF performance of qca2066 soc chip from different foundries will
> be difference, so we use different nvm to configure them by according

be differen*t*

> to board id.

Sorry for getting on your nerves, but how should your implementation be 
reviewed without having information about the different types. Reading 
the code, there is a “g” variant, and the NVM configuration files will 
have the suffix of the board id? Is that correct? It’d be great to have 
this documented in the commit message.

> Signed-off-by: Tim Jiang <quic_tjiang@quicinc.com>
> ---
>   drivers/bluetooth/btqca.c   | 76 ++++++++++++++++++++++++++++++++++++-
>   drivers/bluetooth/btqca.h   |  4 ++
>   drivers/bluetooth/hci_qca.c |  9 ++++-
>   3 files changed, 87 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
> index fd0941fe8608..a278a58cb6fa 100644
> --- a/drivers/bluetooth/btqca.c
> +++ b/drivers/bluetooth/btqca.c
> @@ -205,6 +205,48 @@ static int qca_send_reset(struct hci_dev *hdev)
>   	return 0;
>   }
>   
> +static int qca_read_fw_board_id(struct hci_dev *hdev, u16 *bid)
> +{
> +	u8 cmd;
> +	struct sk_buff *skb;
> +	struct edl_event_hdr *edl;
> +	int err = 0;
> +	int bid_len;

Maybe `unsigned int` as a length cannot be negative.

> +
> +	bt_dev_dbg(hdev, "QCA read board ID");
> +
> +	cmd = EDL_GET_BID_REQ_CMD;
> +	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
> +				&cmd, 0, HCI_INIT_TIMEOUT);
> +	if (IS_ERR(skb)) {
> +		err = PTR_ERR(skb);
> +		bt_dev_err(hdev, "Reading QCA board ID failed (%d)", err);

Maybe add QCA in the front as done below, and separate it by a colon:

QCA: Reading board id failed (%d)

> +		return err;
> +	}
> +
> +	edl = skb_pull_data(skb, sizeof(*edl));
> +	if (!edl) {
> +		bt_dev_err(hdev, "QCA read board ID with no header");

QCA: board ID without header

> +		err = -EILSEQ;
> +		goto out;
> +	}
> +
> +	if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
> +	    edl->rtype != EDL_GET_BID_REQ_CMD) {
> +		bt_dev_err(hdev, "QCA Wrong packet: %d %d", edl->cresp, edl->rtype);

QCA: wrong packet format for board id

Print it as hex, and also `EDL_CMD_REQ_RES_EVT`, and 
`EDL_GET_BID_REQ_CMD`, so it’s clear which of the two comparisons failed.

> +		err = -EIO;
> +		goto out;
> +	}
> +
> +	bid_len = edl->data[0];
> +	*bid = (edl->data[1] << 8) + edl->data[2];
> +	bt_dev_info(hdev, "%s: bid len = %x, bid = %x", __func__, bid_len, *bid);

Should the length be printed in decimal?

> +
> +out:
> +	kfree_skb(skb);
> +	return err;
> +}
> +
>   int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
>   {
>   	struct sk_buff *skb;
> @@ -574,6 +616,29 @@ int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
>   }
>   EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
>   
> +static void qca_generate_nvm_name(struct hci_dev *hdev, char *fwname,
> +		   size_t max_size, struct qca_btsoc_version ver, u16 bid)
> +{
> +	u8 rom_ver = 0;
> +	u32 soc_ver;
> +	const char *variant;
> +
> +	soc_ver = get_soc_ver(ver.soc_id, ver.rom_ver);
> +	rom_ver = ((soc_ver & 0x00000f00) >> 0x04) | (soc_ver & 0x0000000f);
> +
> +	if ((le32_to_cpu(ver.soc_id) & 0x0000ff00) == QCA_HSP_GF_SOC_ID)  /* hsp gf chip */
> +		variant = "g";
> +	else
> +		variant = "";
> +
> +	if (bid == 0x0)
> +		snprintf(fwname, max_size, "qca/hpnv%02x%s.bin", rom_ver, variant);
> +	else
> +		snprintf(fwname, max_size, "qca/hpnv%02x%s.%x", rom_ver, variant, bid);
> +
> +	bt_dev_info(hdev, "%s: nvm name is %s", __func__, fwname);
> +}
> +
>   int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   		   enum qca_btsoc_type soc_type, struct qca_btsoc_version ver,
>   		   const char *firmware_name)
> @@ -582,6 +647,7 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   	int err;
>   	u8 rom_ver = 0;
>   	u32 soc_ver;
> +	u16 boardid = 0;

I’d use `unsigend int`.


Kind regards,

Paul


>   
>   	bt_dev_dbg(hdev, "QCA setup on UART");
>   
> @@ -604,6 +670,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   	if (qca_is_wcn399x(soc_type)) {
>   		snprintf(config.fwname, sizeof(config.fwname),
>   			 "qca/crbtfw%02x.tlv", rom_ver);
> +	} else if (soc_type == QCA_QCA2066) {
> +		snprintf(config.fwname, sizeof(config.fwname),
> +			 "qca/hpbtfw%02x.tlv", rom_ver);
>   	} else if (soc_type == QCA_QCA6390) {
>   		snprintf(config.fwname, sizeof(config.fwname),
>   			 "qca/htbtfw%02x.tlv", rom_ver);
> @@ -631,6 +700,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   	/* Give the controller some time to get ready to receive the NVM */
>   	msleep(10);
>   
> +	if (soc_type == QCA_QCA2066)
> +		qca_read_fw_board_id(hdev, &boardid);
> +
>   	/* Download NVM configuration */
>   	config.type = TLV_TYPE_NVM;
>   	if (firmware_name)
> @@ -644,7 +716,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   			snprintf(config.fwname, sizeof(config.fwname),
>   				 "qca/crnv%02x.bin", rom_ver);
>   		}
> -	}
> +	} else if (soc_type == QCA_QCA2066)
> +		qca_generate_nvm_name(hdev, config.fwname, sizeof(config.fwname),
> +				ver, boardid);
>   	else if (soc_type == QCA_QCA6390)
>   		snprintf(config.fwname, sizeof(config.fwname),
>   			 "qca/htnv%02x.bin", rom_ver);
> diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
> index b884095bcd9d..7c9b3464ae4a 100644
> --- a/drivers/bluetooth/btqca.h
> +++ b/drivers/bluetooth/btqca.h
> @@ -13,6 +13,7 @@
>   #define EDL_PATCH_TLV_REQ_CMD		(0x1E)
>   #define EDL_GET_BUILD_INFO_CMD		(0x20)
>   #define EDL_NVM_ACCESS_SET_REQ_CMD	(0x01)
> +#define EDL_GET_BID_REQ_CMD		(0x23)
>   #define EDL_PATCH_CONFIG_CMD		(0x28)
>   #define MAX_SIZE_PER_TLV_SEGMENT	(243)
>   #define QCA_PRE_SHUTDOWN_CMD		(0xFC08)
> @@ -48,6 +49,8 @@
>   
>   #define QCA_FW_BUILD_VER_LEN		255
>   
> +#define QCA_HSP_GF_SOC_ID		0x1200
> +
>   
>   enum qca_baudrate {
>   	QCA_BAUDRATE_115200 	= 0,
> @@ -145,6 +148,7 @@ enum qca_btsoc_type {
>   	QCA_WCN3990,
>   	QCA_WCN3998,
>   	QCA_WCN3991,
> +	QCA_QCA2066,
>   	QCA_QCA6390,
>   	QCA_WCN6750,
>   	QCA_WCN6855,
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index 1b064504b388..dd9eab8ee345 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -1729,7 +1729,7 @@ static int qca_setup(struct hci_uart *hu)
>   	bt_dev_info(hdev, "setting up %s",
>   		qca_is_wcn399x(soc_type) ? "wcn399x" :
>   		(soc_type == QCA_WCN6750) ? "wcn6750" :
> -		(soc_type == QCA_WCN6855) ? "wcn6855" : "ROME/QCA6390");
> +		(soc_type == QCA_WCN6855) ? "wcn6855" : "ROME/QCA6390/QCA2066");
>   
>   	qca->memdump_state = QCA_MEMDUMP_IDLE;
>   
> @@ -1874,6 +1874,11 @@ static const struct qca_device_data qca_soc_data_qca6390 __maybe_unused = {
>   	.num_vregs = 0,
>   };
>   
> +static const struct qca_device_data qca_soc_data_qca2066 __maybe_unused = {
> +	.soc_type = QCA_QCA2066,
> +	.num_vregs = 0,
> +};
> +
>   static const struct qca_device_data qca_soc_data_wcn6750 __maybe_unused = {
>   	.soc_type = QCA_WCN6750,
>   	.vregs = (struct qca_vreg []) {
> @@ -2356,6 +2361,7 @@ static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume);
>   
>   #ifdef CONFIG_OF
>   static const struct of_device_id qca_bluetooth_of_match[] = {
> +	{ .compatible = "qcom,qca2066-bt", .data = &qca_soc_data_qca2066},
>   	{ .compatible = "qcom,qca6174-bt" },
>   	{ .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},
>   	{ .compatible = "qcom,qca9377-bt" },
> @@ -2371,6 +2377,7 @@ MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
>   
>   #ifdef CONFIG_ACPI
>   static const struct acpi_device_id qca_bluetooth_acpi_match[] = {
> +	{ "QCOM2066", (kernel_ulong_t)&qca_soc_data_qca2066 },
>   	{ "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 },
>   	{ "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
>   	{ "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 },