From patchwork Fri Dec 15 07:39:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jie Luo X-Patchwork-Id: 754521 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 2CB6C2556D; Fri, 15 Dec 2023 07:41:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="QxRuoIVz" Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3BF6MrIJ017495; Fri, 15 Dec 2023 07:41:03 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= qcppdkim1; bh=aIflHOg5j1TD5f9dlGljKMBH2UICanRLywB993J/YwY=; b=Qx RuoIVzx+EE96WpuEhrLghz7q8FuNuq0tfdy94WNXCT8oPqNgYypHhj4zIsPU+xvR 4rJWSDLaMpORIpQPr6gLkQh6XKIMs114ho64rmK539kozAvQVK/5xpAC1wcoaj8/ I9+bxyoQFpz6zFtgJiU8QCbZrcXCt3q0TCZEmUe0eFWHj8SJ/f6eXme/c/AjqCZ6 GkREBxH8mCQ6hI+azqkmcbHs+UXA6fnHdwD/GZYftQ51JBe61lQtjbsWa7ieLCsN hVgNlspWrI7Z/tljI4cbrvCaF/oEEbl4wXkA922fmTHzA9qW6XmYHKcHDLrZuAtH cYvj+DpmQoPVQoZPiA0Q== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3v090u1pav-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 Dec 2023 07:41:03 +0000 (GMT) Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3BF7f2ZX002948 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 Dec 2023 07:41:02 GMT Received: from akronite-sh-dev02.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 14 Dec 2023 23:40:57 -0800 From: Luo Jie To: , , , , , , , , , , , , CC: , , , Subject: [PATCH v8 08/14] net: phy: at803x: add qca8084 switch registe access Date: Fri, 15 Dec 2023 15:39:58 +0800 Message-ID: <20231215074005.26976-9-quic_luoj@quicinc.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231215074005.26976-1-quic_luoj@quicinc.com> References: <20231215074005.26976-1-quic_luoj@quicinc.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: VS13WMsugyyZgO5FD35iY-Z8g9HFBcn9 X-Proofpoint-ORIG-GUID: VS13WMsugyyZgO5FD35iY-Z8g9HFBcn9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312150047 For qca8084 chip, there are GCC, TLMM and security control modules besides the PHY, these moudles are accessed with 32 bits value, which has the special MDIO sequences to read or write this 32bit register. There are initial configurations configured to make qca8084 PHY probeable, and the MDIO address of qca8084 can be programmed for the PHY device and PCS device. Signed-off-by: Luo Jie --- drivers/net/phy/at803x.c | 85 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index cd1bdb61d122..4982bde5a8a5 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -296,6 +296,13 @@ #define QCA8084_MMD7_IPG_OP 0x901d #define QCA8084_IPG_10_TO_11_EN BIT(0) +/* QCA8084 includes secure control module, which supports customizing the + * MDIO address of PHY device and PCS device, the register of secure control + * is accessed by MDIO bus with the special MDIO sequences. + */ +#define QCA8084_HIGH_ADDR_PREFIX 0x18 +#define QCA8084_LOW_ADDR_PREFIX 0x10 + MODULE_DESCRIPTION("Qualcomm Atheros AR803x and QCA808X PHY driver"); MODULE_AUTHOR("Matus Ujhelyi"); MODULE_LICENSE("GPL"); @@ -408,6 +415,84 @@ static int at803x_read_page(struct phy_device *phydev) return AT803X_PAGE_FIBER; } +static void qca8084_split_addr(u32 regaddr, u16 *r1, u16 *r2, + u16 *page, u16 *sw_addr) +{ + *r1 = regaddr & 0x1c; + + regaddr >>= 5; + *r2 = regaddr & 0x7; + + regaddr >>= 3; + *page = regaddr & 0xffff; + + regaddr >>= 16; + *sw_addr = regaddr & 0xff; +} + +static int __qca8084_set_page(struct mii_bus *bus, u16 sw_addr, u16 page) +{ + return __mdiobus_write(bus, QCA8084_HIGH_ADDR_PREFIX | (sw_addr >> 5), + sw_addr & 0x1f, page); +} + +static int __qca8084_mii_read(struct mii_bus *bus, u16 addr, u16 reg, u32 *val) +{ + int ret, data; + + ret = __mdiobus_read(bus, addr, reg); + if (ret >= 0) { + data = ret; + + ret = __mdiobus_read(bus, addr, reg | BIT(1)); + if (ret >= 0) + *val = data | ret << 16; + } + + return ret < 0 ? ret : 0; +} + +static int __qca8084_mii_write(struct mii_bus *bus, u16 addr, u16 reg, u32 val) +{ + int ret; + + ret = __mdiobus_write(bus, addr, reg, lower_16_bits(val)); + if (!ret) + ret = __mdiobus_write(bus, addr, reg | BIT(1), upper_16_bits(val)); + + return ret; +} + +static int qca8084_mii_modify(struct phy_device *phydev, u32 regaddr, + u32 clear, u32 set) +{ + struct mii_bus *bus; + u16 reg, addr, page, sw_addr; + u32 val; + int ret; + + bus = phydev->mdio.bus; + mutex_lock(&bus->mdio_lock); + + qca8084_split_addr(regaddr, ®, &addr, &page, &sw_addr); + ret = __qca8084_set_page(bus, sw_addr, page); + if (ret < 0) + goto qca8084_mii_modify_exit; + + ret = __qca8084_mii_read(bus, QCA8084_LOW_ADDR_PREFIX | addr, + reg, &val); + if (ret < 0) + goto qca8084_mii_modify_exit; + + val &= ~clear; + val |= set; + ret = __qca8084_mii_write(bus, QCA8084_LOW_ADDR_PREFIX | addr, + reg, val); +qca8084_mii_modify_exit: + mutex_unlock(&bus->mdio_lock); + return ret; +}; + static int at803x_enable_rx_delay(struct phy_device *phydev) { return at803x_debug_reg_mask(phydev, AT803X_DEBUG_ANALOG_TEST_CTRL, 0,