netdev - Re: [PATCH v2 4/4] wifi: wilc1000: Add WILC3000 support

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Message-ID: <9217902b-7d1b-4d67-a148-a28484e8946e@bootlin.com>
Date: Tue, 27 Aug 2024 10:28:27 +0200
From: Alexis Lothoré <alexis.lothore@...tlin.com>
To: Marek Vasut <marex@...x.de>, linux-wireless@...r.kernel.org
Cc: Ajay Singh <ajay.kathat@...rochip.com>,
 "David S. Miller" <davem@...emloft.net>,
 Adham Abozaeid <adham.abozaeid@...rochip.com>,
 Claudiu Beznea <claudiu.beznea@...on.dev>, Conor Dooley
 <conor+dt@...nel.org>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Kalle Valo <kvalo@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org,
 netdev@...r.kernel.org
Subject: Re: [PATCH v2 4/4] wifi: wilc1000: Add WILC3000 support

On 8/23/24 18:08, Marek Vasut wrote:
> From: Ajay Singh <ajay.kathat@...rochip.com>
> 
> Add support for the WILC3000 chip. The chip is similar to WILC1000,
> except that the register layout is slightly different and it does
> not support WPA3/SAE.
> 
> Signed-off-by: Ajay Singh <ajay.kathat@...rochip.com>
> Signed-off-by: Marek Vasut <marex@...x.de>
> ---
> Note: Squashed and updated from the following downstream patches:
> wifi: wilc1000: wilc3000 support added
> wifi: wilc1000: wilc3000 interrupt handling
> wifi: wilc1000: wilc3000 added chip wake and sleep support
> wifi: wilc1000: wilc3000 FW file sepecific changes
> ---
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Adham Abozaeid <adham.abozaeid@...rochip.com>
> Cc: Ajay Singh <ajay.kathat@...rochip.com>
> Cc: Alexis Lothoré <alexis.lothore@...tlin.com>
> Cc: Claudiu Beznea <claudiu.beznea@...on.dev>
> Cc: Conor Dooley <conor+dt@...nel.org>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Kalle Valo <kvalo@...nel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>
> Cc: Marek Vasut <marex@...x.de>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: Rob Herring <robh@...nel.org>
> Cc: devicetree@...r.kernel.org
> Cc: linux-wireless@...r.kernel.org
> Cc: netdev@...r.kernel.org
> ---
> V2: - Return -EINVAL in wilc_sdio_init() if chip ID is not supported
>     - Dispose of wilc_chip_type, replace with is_wilc1000()/is_wilc3000()
>     - Remove wilc3000 DT compatible string handling, match on wilc1000 only,
>       the device type can be auto-detected based on chipID
> ---
>  .../wireless/microchip/wilc1000/cfg80211.c    |   7 +
>  .../net/wireless/microchip/wilc1000/netdev.c  |  29 ++-
>  .../net/wireless/microchip/wilc1000/sdio.c    |  62 ++++-
>  drivers/net/wireless/microchip/wilc1000/spi.c |   2 +-
>  .../net/wireless/microchip/wilc1000/wlan.c    | 217 +++++++++++++++---
>  .../net/wireless/microchip/wilc1000/wlan.h    |  43 +++-
>  6 files changed, 298 insertions(+), 62 deletions(-)
> 

[...]

> @@ -1467,6 +1604,20 @@ static int init_chip(struct net_device *dev)
>  		}
>  	}
>  
> +	if (is_wilc3000(wilc->chipid)) {
> +		ret = wilc->hif_func->hif_read_reg(wilc, 0x207ac, &reg);

Some defines would be nice here instead of hardcoded addresses. I have asked
Ajay about those while working on wilc3000, the meaning is roughly the following:
- 0x000207ac: WILC_3000_BOOTROM_STATUS_REGISTER
- 0x004f0000: WILC_3000_CORTUS_BOOT_REGISTER_2
- 0x71: WILC_CORTUS_BOOT_FROM_IRAM

Thanks,

Alexis

-- 
Alexis Lothoré, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com