Hi Venkata,
I agree with Marcel that the version magic is confusing ...
On Tue, Sep 15, 2020 at 09:13:25PM +0530, Venkata Lakshmi Narayana Gubba wrote:
> This change will allow to use different NVM file based
> on WCN3991 BT SoC ID.Need to use different NVM file based on
> fab location for WCN3991 BT SoC.
>
> Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@xxxxxxxxxxxxxx>
> ---
> drivers/bluetooth/btqca.c | 41 +++++++++++++++++++++++++----------------
> drivers/bluetooth/btqca.h | 13 ++++++++-----
> drivers/bluetooth/hci_qca.c | 11 +++++------
> 3 files changed, 38 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
> index ce9dcff..a7e72f1 100644
> --- a/drivers/bluetooth/btqca.c
> +++ b/drivers/bluetooth/btqca.c
> @@ -14,12 +14,11 @@
>
> #define VERSION "0.1"
>
> -int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version,
> +int qca_read_soc_version(struct hci_dev *hdev, struct qca_btsoc_version *ver,
> enum qca_btsoc_type soc_type)
> {
> struct sk_buff *skb;
> struct edl_event_hdr *edl;
> - struct qca_btsoc_version *ver;
> char cmd;
> int err = 0;
> u8 event_type = HCI_EV_VENDOR;
> @@ -70,9 +69,9 @@ int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version,
> }
>
> if (soc_type >= QCA_WCN3991)
> - memmove(&edl->data, &edl->data[1], sizeof(*ver));
> -
> - ver = (struct qca_btsoc_version *)(edl->data);
> + memcpy(ver, &edl->data[1], sizeof(*ver));
> + else
> + memcpy(ver, &edl->data, sizeof(*ver));
>
> bt_dev_info(hdev, "QCA Product ID :0x%08x",
> le32_to_cpu(ver->product_id));
> @@ -83,13 +82,7 @@ int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version,
> bt_dev_info(hdev, "QCA Patch Version:0x%08x",
> le16_to_cpu(ver->patch_ver));
>
> - /* QCA chipset version can be decided by patch and SoC
> - * version, combination with upper 2 bytes from SoC
> - * and lower 2 bytes from patch will be used.
> - */
> - *soc_version = (le32_to_cpu(ver->soc_id) << 16) |
> - (le16_to_cpu(ver->rom_ver) & 0x0000ffff);
> - if (*soc_version == 0)
> + if (le32_to_cpu(ver->soc_id) == 0 || le16_to_cpu(ver->rom_ver) == 0)
> err = -EILSEQ;
>
> out:
> @@ -446,15 +439,25 @@ int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
> EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
>
> int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> - enum qca_btsoc_type soc_type, u32 soc_ver,
> + enum qca_btsoc_type soc_type, struct qca_btsoc_version ver,
> const char *firmware_name)
> {
> struct qca_fw_config config;
> int err;
> u8 rom_ver = 0;
> + u32 soc_ver;
>
> bt_dev_dbg(hdev, "QCA setup on UART");
>
> + /* QCA chipset version can be decided by patch and SoC
> + * version, combination with upper 2 bytes from SoC
> + * and lower 2 bytes from patch will be used.
> + */
> + soc_ver = (le32_to_cpu(ver.soc_id) << 16) |
> + (le16_to_cpu(ver.rom_ver) & 0x0000ffff);
> +
Can we at least do the leN_to_cpu conversions in qca_read_soc_version()
as previously to make this less clunky?
And/or define a macro to extract 'soc_ver' to unclunkify this further.
> + bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
> +
> config.user_baud_rate = baudrate;
>
> /* Download rampatch file */
> @@ -491,9 +494,15 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> if (firmware_name)
> snprintf(config.fwname, sizeof(config.fwname),
> "qca/%s", firmware_name);
> - else if (qca_is_wcn399x(soc_type))
> - snprintf(config.fwname, sizeof(config.fwname),
> - "qca/crnv%02x.bin", rom_ver);
> + else if (qca_is_wcn399x(soc_type)) {
> + if (ver.soc_id == QCA_WCN3991_SOC_ID) {
> + snprintf(config.fwname, sizeof(config.fwname),
> + "qca/crnv%02xu.bin", rom_ver);
> + } else {
> + snprintf(config.fwname, sizeof(config.fwname),
> + "qca/crnv%02x.bin", rom_ver);
> + }
> + }
> 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 d81b74c..d01a9f5 100644
> --- a/drivers/bluetooth/btqca.h
> +++ b/drivers/bluetooth/btqca.h
> @@ -34,6 +34,8 @@
> #define QCA_HCI_CC_OPCODE 0xFC00
> #define QCA_HCI_CC_SUCCESS 0x00
>
> +#define QCA_WCN3991_SOC_ID (0x40014320)
The QCA_ prefix seems a bit verbose, given that this is a QCA driver and
WCN3991 uniquely identifies the chip. Having the prefix just needlessly
clutters conditions, I suggest to just call it SOC_ID_WCN3991.
