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SubjectRe: [PATCH v1] Bluetooth: Use NVM files based on SoC ID for WCN3991
Hi Matthias,

On 2020-09-16 23:32, Matthias Kaehlcke wrote:
> 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@codeaurora.org>
>> ---
>> 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.
>
[Venkata]:
I will define a macro to extract soc_ver and will update in next
patchset.
>> + 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.

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