Re: [PATCH v1] Bluetooth: Use NVM files based on SoC ID for WCN3991

[gubbaven@xxxxxxxxxxxxxx]

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@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.
[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.