From nobody Fri Nov 22 03:13:40 2024 Received: from out28-146.mail.aliyun.com (out28-146.mail.aliyun.com [115.124.28.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 668DD1A0734; Wed, 20 Nov 2024 10:56:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.28.146 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732100214; cv=none; b=MqEjNUeBbEb3vPHR5PdSafe5sBuF2IsWjVqOtz6zRZLrFezOU21tDmexg+kznQwMQEH2AKiKh+UyOFWTrlJfzMBTAuIxqc9iZ9Kpw+xcQDY/yBtm69WxmrZrZ9Rg99AndJPzPBmTHV+ARxdQeIBPPord3SObxs6kqs/ET7kWSLI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732100214; c=relaxed/simple; bh=iRjzYxl1/YHWQu1R4zyczirciBSft4OLVHF0hmQ2Dno=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=lx+vw3ESTGpNpYdx3N3g57trlzRxViRe0qULn7deq38amFOa+/Nn+V8H7VLSsXgkcg1fcvxFpgkh4WuowbCzCPz97ccvJkXf5c2fjvWpSgMEC/ADNN6p75NFDmUuaNyMCHctL3U+i4A7QyY8cZ69UEmxP4CuAdB9+jbxTEJZsMM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=motor-comm.com; spf=pass smtp.mailfrom=motor-comm.com; arc=none smtp.client-ip=115.124.28.146 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=motor-comm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=motor-comm.com Received: from sun-VirtualBox..(mailfrom:Frank.Sae@motor-comm.com fp:SMTPD_---.aGmppZM_1732100202 cluster:ay29) by smtp.aliyun-inc.com; Wed, 20 Nov 2024 18:56:43 +0800 From: Frank Sae To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, xiaogang.fan@motor-comm.com, fei.zhang@motor-comm.com, hua.sun@motor-comm.com, Frank.Sae@motor-comm.com Subject: [PATCH net-next v2 08/21] motorcomm:yt6801: Implement the fxgmac_read_mac_addr function Date: Wed, 20 Nov 2024 18:56:12 +0800 Message-Id: <20241120105625.22508-9-Frank.Sae@motor-comm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241120105625.22508-1-Frank.Sae@motor-comm.com> References: <20241120105625.22508-1-Frank.Sae@motor-comm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Implement the fxgmac_read_mac_addr function to read mac address form efuse. Signed-off-by: Frank Sae --- .../ethernet/motorcomm/yt6801/yt6801_net.c | 147 ++++++++++++++++++ 1 file changed, 147 insertions(+) diff --git a/drivers/net/ethernet/motorcomm/yt6801/yt6801_net.c b/drivers/n= et/ethernet/motorcomm/yt6801/yt6801_net.c index aa51ecdd7..c3baa06b0 100644 --- a/drivers/net/ethernet/motorcomm/yt6801/yt6801_net.c +++ b/drivers/net/ethernet/motorcomm/yt6801/yt6801_net.c @@ -796,6 +796,153 @@ static int fxgmac_open(struct net_device *netdev) return ret; } =20 +#define EFUSE_FISRT_UPDATE_ADDR 255 +#define EFUSE_SECOND_UPDATE_ADDR 209 +#define EFUSE_MAX_ENTRY 39 +#define EFUSE_PATCH_ADDR_START 0 +#define EFUSE_PATCH_DATA_START 2 +#define EFUSE_PATCH_SIZE 6 +#define EFUSE_REGION_A_B_LENGTH 18 + +static bool fxgmac_efuse_read_data(struct fxgmac_pdata *pdata, u32 offset, + u8 *value) +{ + bool ret =3D false; + u32 wait =3D 1000; + u32 val =3D 0; + + fxgmac_set_bits(&val, EFUSE_OP_ADDR_POS, EFUSE_OP_ADDR_LEN, offset); + fxgmac_set_bits(&val, EFUSE_OP_START_POS, EFUSE_OP_START_LEN, 1); + fxgmac_set_bits(&val, EFUSE_OP_MODE_POS, EFUSE_OP_MODE_LEN, + EFUSE_OP_MODE_ROW_READ); + wr32_mem(pdata, val, EFUSE_OP_CTRL_0); + + while (wait--) { + fsleep(20); + val =3D rd32_mem(pdata, EFUSE_OP_CTRL_1); + if (FXGMAC_GET_BITS(val, EFUSE_OP_DONE_POS, + EFUSE_OP_DONE_LEN)) { + ret =3D true; + break; + } + } + + if (!ret) { + yt_err(pdata, "Fail to reading efuse Byte%d\n", offset); + return ret; + } + + if (value) + *value =3D FXGMAC_GET_BITS(val, EFUSE_OP_RD_DATA_POS, + EFUSE_OP_RD_DATA_LEN) & 0xff; + + return ret; +} + +static bool fxgmac_efuse_read_index_patch(struct fxgmac_pdata *pdata, u8 i= ndex, + u32 *offset, u32 *value) +{ + u8 tmp[EFUSE_PATCH_SIZE - EFUSE_PATCH_DATA_START]; + u32 addr, i; + bool ret; + + if (index >=3D EFUSE_MAX_ENTRY) { + yt_err(pdata, "Reading efuse out of range, index %d\n", index); + return false; + } + + for (i =3D EFUSE_PATCH_ADDR_START; i < EFUSE_PATCH_DATA_START; i++) { + addr =3D EFUSE_REGION_A_B_LENGTH + index * EFUSE_PATCH_SIZE + i; + ret =3D fxgmac_efuse_read_data(pdata, addr, + tmp + i - EFUSE_PATCH_ADDR_START); + if (!ret) { + yt_err(pdata, "Fail to reading efuse Byte%d\n", addr); + return ret; + } + } + if (offset) { + /* tmp[0] is low 8bit date, tmp[1] is high 8bit date */ + *offset =3D tmp[0] | (tmp[1] << 8); + } + + for (i =3D EFUSE_PATCH_DATA_START; i < EFUSE_PATCH_SIZE; i++) { + addr =3D EFUSE_REGION_A_B_LENGTH + index * EFUSE_PATCH_SIZE + i; + ret =3D fxgmac_efuse_read_data(pdata, addr, + tmp + i - EFUSE_PATCH_DATA_START); + if (!ret) { + yt_err(pdata, "Fail to reading efuse Byte%d\n", addr); + return ret; + } + } + if (value) { + /* tmp[0] is low 8bit date, tmp[1] is low 8bit date + * ... tmp[3] is highest 8bit date + */ + *value =3D tmp[0] | (tmp[1] << 8) | (tmp[2] << 16) | + (tmp[3] << 24); + } + + return ret; +} + +static bool fxgmac_efuse_read_mac_subsys(struct fxgmac_pdata *pdata, + u8 *mac_addr, u32 *subsys, u32 *revid) +{ + u32 machr =3D 0, maclr =3D 0; + u32 offset =3D 0, val =3D 0; + bool ret =3D true; + u8 index; + + for (index =3D 0;; index++) { + if (!fxgmac_efuse_read_index_patch(pdata, index, &offset, &val)) + return false; + + if (offset =3D=3D 0x00) + break; /* Reach the blank. */ + + if (offset =3D=3D MACA0LR_FROM_EFUSE) + maclr =3D val; + + if (offset =3D=3D MACA0HR_FROM_EFUSE) + machr =3D val; + + if (offset =3D=3D PCI_REVISION_ID && revid) + *revid =3D val; + + if (offset =3D=3D PCI_SUBSYSTEM_VENDOR_ID && subsys) + *subsys =3D val; + } + + if (mac_addr) { + mac_addr[5] =3D (u8)(maclr & 0xFF); + mac_addr[4] =3D (u8)((maclr >> 8) & 0xFF); + mac_addr[3] =3D (u8)((maclr >> 16) & 0xFF); + mac_addr[2] =3D (u8)((maclr >> 24) & 0xFF); + mac_addr[1] =3D (u8)(machr & 0xFF); + mac_addr[0] =3D (u8)((machr >> 8) & 0xFF); + } + + return ret; +} + +static int fxgmac_read_mac_addr(struct fxgmac_pdata *pdata) +{ + u8 default_addr[ETH_ALEN] =3D { 0, 0x55, 0x7b, 0xb5, 0x7d, 0xf7 }; + struct net_device *netdev =3D pdata->netdev; + int ret; + + /* If efuse have mac addr, use it. if not, use static mac address. */ + ret =3D fxgmac_efuse_read_mac_subsys(pdata, pdata->mac_addr, NULL, NULL); + if (!ret) + return -1; + + if (is_zero_ether_addr(pdata->mac_addr)) + /* Use a static mac address for test */ + memcpy(pdata->mac_addr, default_addr, netdev->addr_len); + + return 0; +} + #define FXGMAC_SYSCLOCK 125000000 /* System clock is 125 MHz */ =20 static void fxgmac_default_config(struct fxgmac_pdata *pdata) --=20 2.34.1