Re: [PATCH v1 1/4] wifi: brcmfmac: Rename Cypress 89459 to BCM4355

From: Arend van Spriel
Date: Wed Jan 04 2023 - 08:32:55 EST

On 1/4/2023 11:01 AM, 'Hector Martin' via BRCM80211-DEV-LIST,PDL wrote:
The commit that introduced support for this chip incorrectly claimed it
is a Cypress-specific part, while in actuality it is just a variant of
BCM4355 silicon (as evidenced by the chip ID).

The relationship between Cypress products and Broadcom products isn't
entirely clear, but given what little information is available and prior
art in the driver, it seems the convention should be that originally
Broadcom parts should retain the Broadcom name.

Thus, rename the relevant constants and firmware file. Also rename the
specific 89459 PCIe ID to BCM43596, which seems to be the original
subvariant name for this PCI ID (as defined in the out-of-tree bcmdhd
driver). Also declare the firmware as CLM-capable, since it is.

Fixes: dce45ded7619 ("brcmfmac: Support 89459 pcie")
Signed-off-by: Hector Martin <marcan@xxxxxxxxx>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c | 5 ++---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 8 ++++----
.../net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h | 6 +++---
3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
index 121893bbaa1d..3e42c2bd0d9a 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c

[...]

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index ae57a9a3ab05..3264be485e20 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c

[...]

@@ -2590,6 +2590,7 @@ static const struct pci_device_id brcmf_pcie_devid_table[] = {
BRCMF_PCIE_DEVICE(BRCM_PCIE_4350_DEVICE_ID, WCC),
BRCMF_PCIE_DEVICE_SUB(0x4355, BRCM_PCIE_VENDOR_ID_BROADCOM, 0x4355, WCC),
BRCMF_PCIE_DEVICE(BRCM_PCIE_4354_RAW_DEVICE_ID, WCC),
+ BRCMF_PCIE_DEVICE(BRCM_PCIE_4355_RAW_DEVICE_ID, WCC),

A bit of a problem here. If Cypress want to support this device, regardless how they branded it, they will provide its firmware. Given that they initially added it (as 89459) I suppose we should mark it with CYW and not WCC. Actually, see my comment below on RAW dev ids.

BRCMF_PCIE_DEVICE(BRCM_PCIE_4356_DEVICE_ID, WCC),
BRCMF_PCIE_DEVICE(BRCM_PCIE_43567_DEVICE_ID, WCC),
BRCMF_PCIE_DEVICE(BRCM_PCIE_43570_DEVICE_ID, WCC),

[...]

diff --git a/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h b/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h
index f4939cf62767..cacc43db86eb 100644
--- a/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h
+++ b/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h

[...]

@@ -72,6 +72,7 @@
#define BRCM_PCIE_4350_DEVICE_ID 0x43a3
#define BRCM_PCIE_4354_DEVICE_ID 0x43df
#define BRCM_PCIE_4354_RAW_DEVICE_ID 0x4354
+#define BRCM_PCIE_4355_RAW_DEVICE_ID 0x4355

I would remove all RAW device ids. These should not be observed outside chip vendor walls.

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