From patchwork Mon Jan 4 18:00:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 357334 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60903C433DB for ; Mon, 4 Jan 2021 18:01:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34D5B20784 for ; Mon, 4 Jan 2021 18:01:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726896AbhADSBH (ORCPT ); Mon, 4 Jan 2021 13:01:07 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:57557 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726328AbhADSBH (ORCPT ); Mon, 4 Jan 2021 13:01:07 -0500 X-UUID: 299896ebf9574cba84e14e10ff4f1df6-20210105 X-UUID: 299896ebf9574cba84e14e10ff4f1df6-20210105 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1176697449; Tue, 05 Jan 2021 02:00:22 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 5 Jan 2021 02:00:21 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 5 Jan 2021 02:00:21 +0800 From: To: , CC: , , , , , , , , , , Lorenzo Bianconi Subject: [PATCH -next v5 06/15] mt76: mt7921: add EEPROM support Date: Tue, 5 Jan 2021 02:00:10 +0800 Message-ID: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Sean Wang Add EEPROM support to MT7921 to determine the capability the card has such as indentificaiton, MAC address, the band and antenna number the card able to support. Co-developed-by: Lorenzo Bianconi Signed-off-by: Lorenzo Bianconi Co-developed-by: Soul Huang Signed-off-by: Soul Huang Signed-off-by: Sean Wang --- .../wireless/mediatek/mt76/mt7921/eeprom.c | 101 ++++++++++++++++++ .../wireless/mediatek/mt76/mt7921/eeprom.h | 27 +++++ 2 files changed, 128 insertions(+) create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c new file mode 100644 index 000000000000..05e32764e17a --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c @@ -0,0 +1,101 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2020 MediaTek Inc. */ + +#include "mt7921.h" +#include "eeprom.h" + +static u32 mt7921_eeprom_read(struct mt7921_dev *dev, u32 offset) +{ + u8 *data = dev->mt76.eeprom.data; + + if (data[offset] == 0xff) + mt7921_mcu_get_eeprom(dev, offset); + + return data[offset]; +} + +static int mt7921_eeprom_load(struct mt7921_dev *dev) +{ + int ret; + + ret = mt76_eeprom_init(&dev->mt76, MT7921_EEPROM_SIZE); + if (ret < 0) + return ret; + + memset(dev->mt76.eeprom.data, -1, MT7921_EEPROM_SIZE); + + return 0; +} + +static int mt7921_check_eeprom(struct mt7921_dev *dev) +{ + u8 *eeprom = dev->mt76.eeprom.data; + u16 val; + + mt7921_eeprom_read(dev, MT_EE_CHIP_ID); + val = get_unaligned_le16(eeprom); + + switch (val) { + case 0x7961: + return 0; + default: + return -EINVAL; + } +} + +void mt7921_eeprom_parse_band_config(struct mt7921_phy *phy) +{ + struct mt7921_dev *dev = phy->dev; + u32 val; + + val = mt7921_eeprom_read(dev, MT_EE_WIFI_CONF); + val = FIELD_GET(MT_EE_WIFI_CONF_BAND_SEL, val); + + switch (val) { + case MT_EE_5GHZ: + phy->mt76->cap.has_5ghz = true; + break; + case MT_EE_2GHZ: + phy->mt76->cap.has_2ghz = true; + break; + default: + phy->mt76->cap.has_2ghz = true; + phy->mt76->cap.has_5ghz = true; + break; + } +} + +static void mt7921_eeprom_parse_hw_cap(struct mt7921_dev *dev) +{ + u8 tx_mask, *eeprom = dev->mt76.eeprom.data; + + mt7921_eeprom_parse_band_config(&dev->phy); + + /* read tx mask from eeprom (0: 1Tx, 1: 2Tx) */ + tx_mask = FIELD_GET(MT_EE_WIFI_CONF_TX_MASK, eeprom[MT_EE_WIFI_CONF]); + tx_mask = tx_mask + 1; + dev->chainmask = BIT(tx_mask) - 1; + dev->mphy.antenna_mask = dev->chainmask; + dev->mphy.chainmask = dev->mphy.antenna_mask; +} + +int mt7921_eeprom_init(struct mt7921_dev *dev) +{ + int ret; + + ret = mt7921_eeprom_load(dev); + if (ret < 0) + return ret; + + ret = mt7921_check_eeprom(dev); + if (ret) + return ret; + + mt7921_eeprom_parse_hw_cap(dev); + memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR, + ETH_ALEN); + + mt76_eeprom_override(&dev->mphy); + + return 0; +} diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h new file mode 100644 index 000000000000..54f30401343c --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: ISC */ +/* Copyright (C) 2020 MediaTek Inc. */ + +#ifndef __MT7921_EEPROM_H +#define __MT7921_EEPROM_H + +#include "mt7921.h" + +enum mt7921_eeprom_field { + MT_EE_CHIP_ID = 0x000, + MT_EE_VERSION = 0x002, + MT_EE_MAC_ADDR = 0x004, + MT_EE_WIFI_CONF = 0x07c, + __MT_EE_MAX = 0x3bf +}; + +#define MT_EE_WIFI_CONF_TX_MASK BIT(0) +#define MT_EE_WIFI_CONF_BAND_SEL GENMASK(3, 2) + +enum mt7921_eeprom_band { + MT_EE_NA, + MT_EE_5GHZ, + MT_EE_2GHZ, + MT_EE_DUAL_BAND, +}; + +#endif