linux-kernel - [RFC PATCH v1 06/19] rtw88: rtw8821c: Add support for parsing the RTL8821CS (SDIO) efuse

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Message-Id: <20221227233020.284266-7-martin.blumenstingl@googlemail.com>
Date:   Wed, 28 Dec 2022 00:30:07 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-wireless@...r.kernel.org
Cc:     Yan-Hsuan Chuang <tony0620emma@...il.com>,
        Kalle Valo <kvalo@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-mmc@...r.kernel.org, Chris Morgan <macroalpha82@...il.com>,
        Nitin Gupta <nitin.gupta981@...il.com>,
        Neo Jou <neojou@...il.com>, Pkshih <pkshih@...ltek.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [RFC PATCH v1 06/19] rtw88: rtw8821c: Add support for parsing the RTL8821CS (SDIO) efuse

The efuse of the SDIO RTL8821CS chip has only one known member: the mac
address is at offset 0x11a. Add a struct rtw8821cs_efuse describing this
and use it for copying the mac address when the SDIO bus is used.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 drivers/net/wireless/realtek/rtw88/rtw8821c.c | 9 +++++++++
 drivers/net/wireless/realtek/rtw88/rtw8821c.h | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.c b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
index 17f800f6efbd..dd01b22f9770 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8821c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
@@ -26,6 +26,12 @@ static void rtw8821ce_efuse_parsing(struct rtw_efuse *efuse,
 	ether_addr_copy(efuse->addr, map->e.mac_addr);
 }
 
+static void rtw8821cs_efuse_parsing(struct rtw_efuse *efuse,
+				    struct rtw8821c_efuse *map)
+{
+	ether_addr_copy(efuse->addr, map->s.mac_addr);
+}
+
 static void rtw8821cu_efuse_parsing(struct rtw_efuse *efuse,
 				    struct rtw8821c_efuse *map)
 {
@@ -74,6 +80,9 @@ static int rtw8821c_read_efuse(struct rtw_dev *rtwdev, u8 *log_map)
 	case RTW_HCI_TYPE_PCIE:
 		rtw8821ce_efuse_parsing(efuse, map);
 		break;
+	case RTW_HCI_TYPE_SDIO:
+		rtw8821cs_efuse_parsing(efuse, map);
+		break;
 	case RTW_HCI_TYPE_USB:
 		rtw8821cu_efuse_parsing(efuse, map);
 		break;
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.h b/drivers/net/wireless/realtek/rtw88/rtw8821c.h
index 1c81260f3a54..1deea54575b5 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8821c.h
+++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.h
@@ -65,6 +65,11 @@ struct rtw8821ce_efuse {
 	u8 res7;
 };
 
+struct rtw8821cs_efuse {
+	u8 res4[0x4a];			/* 0xd0 */
+	u8 mac_addr[ETH_ALEN];		/* 0x11a */
+};
+
 struct rtw8821c_efuse {
 	__le16 rtl_id;
 	u8 res0[0x0e];
@@ -93,6 +98,7 @@ struct rtw8821c_efuse {
 	u8 res[3];
 	union {
 		struct rtw8821ce_efuse e;
+		struct rtw8821cs_efuse s;
 		struct rtw8821cu_efuse u;
 	};
 };
-- 
2.39.0