Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751879AbdG0Qvj (ORCPT ); Thu, 27 Jul 2017 12:51:39 -0400 Received: from mail-qt0-f195.google.com ([209.85.216.195]:34263 "EHLO mail-qt0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751413AbdG0Qvg (ORCPT ); Thu, 27 Jul 2017 12:51:36 -0400 Subject: Re: [PATCH v2 01/11] net: phy: Add rockchip phy driver support To: David Wu , davem@davemloft.net, heiko@sntech.de, andrew@lunn.ch, robh+dt@kernel.org, mark.rutland@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, olof@lixom.net, linux@armlinux.org.uk, arnd@arndb.de Cc: peppe.cavallaro@st.com, alexandre.torgue@st.com, huangtao@rock-chips.com, hwg@rock-chips.com, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <1501160156-30328-1-git-send-email-david.wu@rock-chips.com> <1501160156-30328-2-git-send-email-david.wu@rock-chips.com> From: Florian Fainelli Message-ID: <807c43ee-8421-c0b3-8aea-6091bef07a4c@gmail.com> Date: Thu, 27 Jul 2017 09:51:31 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <1501160156-30328-2-git-send-email-david.wu@rock-chips.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6817 Lines: 245 On 07/27/2017 05:55 AM, David Wu wrote: > Support internal ephy currently. > > Signed-off-by: David Wu > --- > changes in v2: > - Alphabetic order for Kconfig and Makefile. > - Add analog register init. > - Disable auto-mdix for workround. > - Rename config > > drivers/net/phy/Kconfig | 5 ++ > drivers/net/phy/Makefile | 1 + > drivers/net/phy/rockchip.c | 128 +++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 134 insertions(+) > create mode 100644 drivers/net/phy/rockchip.c > > diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig > index 2dda720..8dc6cd7 100644 > --- a/drivers/net/phy/Kconfig > +++ b/drivers/net/phy/Kconfig > @@ -334,6 +334,11 @@ config REALTEK_PHY > ---help--- > Supports the Realtek 821x PHY. > > +config ROCKCHIP_PHY > + tristate "Drivers for ROCKCHIP PHYs" "Driver for Rockchip Ethernet PHYs" would seem more appropriate, this is just one driver for now. > + ---help--- > + Currently supports the internal ephy. EPHY is usually how an Ethernet PHY is abbreviated. > + > config SMSC_PHY > tristate "SMSC PHYs" > ---help--- > diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile > index 8e9b9f3..350520e 100644 > --- a/drivers/net/phy/Makefile > +++ b/drivers/net/phy/Makefile > @@ -66,6 +66,7 @@ obj-$(CONFIG_MICROSEMI_PHY) += mscc.o > obj-$(CONFIG_NATIONAL_PHY) += national.o > obj-$(CONFIG_QSEMI_PHY) += qsemi.o > obj-$(CONFIG_REALTEK_PHY) += realtek.o > +obj-$(CONFIG_ROCKCHIP_PHY) += rockchip.o > obj-$(CONFIG_SMSC_PHY) += smsc.o > obj-$(CONFIG_STE10XP) += ste10Xp.o > obj-$(CONFIG_TERANETICS_PHY) += teranetics.o > diff --git a/drivers/net/phy/rockchip.c b/drivers/net/phy/rockchip.c > new file mode 100644 > index 0000000..3f74658 > --- /dev/null > +++ b/drivers/net/phy/rockchip.c > @@ -0,0 +1,128 @@ > +/** > + * drivers/net/phy/rockchip.c > + * > + * Driver for ROCKCHIP PHY > + * > + * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd > + * > + * David Wu Missing space between your last name and your email address, there is another typo like this in the MODULE_AUTHOR() macro. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define MII_INTERNAL_CTRL_STATUS 17 > +#define SMI_ADDR_TSTCNTL 20 > +#define SMI_ADDR_TSTREAD1 21 > +#define SMI_ADDR_TSTREAD2 22 > +#define SMI_ADDR_TSTWRITE 23 > + > +#define AUTOMDIX_EN BIT(7) > +#define TSTCNTL_RD (BIT(15) | BIT(10)) > +#define TSTCNTL_WR (BIT(14) | BIT(10)) > + > +#define WR_ADDR_A7CFG 0x18 > + > +static void rockchip_init_tstmode(struct phy_device *phydev) > +{ > + /* Enable access to Analog and DSP register banks */ > + phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0400); > + phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0000); > + phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0400); > +} > + > +static void rockchip_close_tstmode(struct phy_device *phydev) > +{ > + /* Back to basic register bank */ > + phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0000); > +} > + > +static void rockchip_internal_phy_analog_init(struct phy_device *phydev) > +{ > + rockchip_init_tstmode(phydev); Technically MDIO writes can fail, but you are not propagating the return value, so you could be stuck on a bad page/bank. > + > + /* > + * Adjust tx amplitude to make sginal better, > + * the default value is 0x8. > + */ > + phy_write(phydev, SMI_ADDR_TSTWRITE, 0xB); > + phy_write(phydev, SMI_ADDR_TSTCNTL, TSTCNTL_WR | WR_ADDR_A7CFG); Likewise. > + > + rockchip_close_tstmode(phydev); Same here. > +} > + > +static int rockchip_internal_phy_config_init(struct phy_device *phydev) > +{ > + int val; > + > + /* > + * The auto MIDX has linked problem on some board, > + * workround to disable auto MDIX. > + */ If this a board-specific problem you may consider register a PHY fixup for the affected boards, or introduce a specific property to illustrate that MDI-X is broken. > + val = phy_read(phydev, MII_INTERNAL_CTRL_STATUS); > + val &= ~AUTOMDIX_EN; > + phy_write(phydev, MII_INTERNAL_CTRL_STATUS, val); You also need to reject MDI configuration requests coming via phy_ethtool_ksettings_set() which you should see in the phyddrv::config_ane callback. > + > + rockchip_internal_phy_analog_init(phydev); > + > + return 0; > +} > + > +static int rockchip_internal_phy_read_status(struct phy_device *phydev) > +{ > + int ret, old_speed; > + > + old_speed = phydev->speed; > + ret = genphy_read_status(phydev); > + if (ret) > + return ret; > + > + /* > + * If mode switch happens from 10BT to 100BT, all DSP/AFE > + * registers are set to default values. So any AFE/DSP > + * registers have to be re-initialized in this case. > + */ > + if ((old_speed == SPEED_10) && (phydev->speed == SPEED_100)) > + rockchip_internal_phy_analog_init(phydev); link changes can be intercepted with a link_change_notify callback, which would be more appropriate than doing this during read_status here. > + > + return ret; > +} > + > +static struct phy_driver rockchip_phy_driver[] = { > +{ > + .phy_id = 0x1234d400, > + .phy_id_mask = 0xffff0000, This mask is way too wide, the industry practice is to have the last 4 digits contain the PHY revision, so I would expect to see 0xffff_fff0 here as a mask. > + .name = "rockchip internal ephy", Rockchip internal EPHY? > + .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause > + | SUPPORTED_Asym_Pause), > + .soft_reset = genphy_soft_reset, Since this is a driver for an internal PHY you also need: .flags = PHY_IS_INTERNAL > + .config_init = rockchip_internal_phy_config_init, > + .config_aneg = genphy_config_aneg, > + .read_status = rockchip_internal_phy_read_status, > + .suspend = genphy_suspend, > + .resume = genphy_resume, You probably need your resume function to restore the AFE/DSP settings that were done in rockchip_internal_phy_config_init() > +}, > +}; > + > +module_phy_driver(rockchip_phy_driver); > + > +static struct mdio_device_id __maybe_unused rockchip_phy_tbl[] = { > + { 0x1234d400, 0xffff0000 }, Please also fix up the mask here. > + { } > +}; > + > +MODULE_DEVICE_TABLE(mdio, rockchip_phy_tbl); > + > +MODULE_AUTHOR("David Wu"); Typo here (same as in the heading). > +MODULE_DESCRIPTION("Rockchip phy driver"); "Rockchip Ethernet PHY driver" so make it clear what type of PHY it manages? > +MODULE_LICENSE("GPL v2"); > -- Florian