From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756097AbeEARD7 (ORCPT ); Tue, 1 May 2018 13:03:59 -0400 Received: from mail-qk0-f195.google.com ([209.85.220.195]:33712 "EHLO mail-qk0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753505AbeEARD5 (ORCPT ); Tue, 1 May 2018 13:03:57 -0400 X-Google-Smtp-Source: AB8JxZpssZskHiaSlFSg37Oxlbsx0MO/T4trVPWqIxPMDKxeOIjLTfdPh5doEFCnp0dRYs4BlRVkoA== Subject: Re: [RFC net-next 4/5] net: phy: Add support for IEEE standard test modes To: Andrew Lunn Cc: netdev@vger.kernel.org, Russell King , open list , davem@davemloft.net, cphealy@gmail.com, nikita.yoush@cogentembedded.com, vivien.didelot@savoirfairelinux.com, Nisar.Sayed@microchip.com, UNGLinuxDriver@microchip.com References: <20180428003237.1536-1-f.fainelli@gmail.com> <20180428003237.1536-5-f.fainelli@gmail.com> <20180430232049.GA25602@lunn.ch> From: Florian Fainelli Openpgp: preference=signencrypt Autocrypt: addr=f.fainelli@gmail.com; prefer-encrypt=mutual; keydata= xsDiBEjPuBIRBACW9MxSJU9fvEOCTnRNqG/13rAGsj+vJqontvoDSNxRgmafP8d3nesnqPyR xGlkaOSDuu09rxuW+69Y2f1TzjFuGpBk4ysWOR85O2Nx8AJ6fYGCoeTbovrNlGT1M9obSFGQ X3IzRnWoqlfudjTO5TKoqkbOgpYqIo5n1QbEjCCwCwCg3DOH/4ug2AUUlcIT9/l3pGvoRJ0E AICDzi3l7pmC5IWn2n1mvP5247urtHFs/uusE827DDj3K8Upn2vYiOFMBhGsxAk6YKV6IP0d ZdWX6fqkJJlu9cSDvWtO1hXeHIfQIE/xcqvlRH783KrihLcsmnBqOiS6rJDO2x1eAgC8meAX SAgsrBhcgGl2Rl5gh/jkeA5ykwbxA/9u1eEuL70Qzt5APJmqVXR+kWvrqdBVPoUNy/tQ8mYc nzJJ63ng3tHhnwHXZOu8hL4nqwlYHRa9eeglXYhBqja4ZvIvCEqSmEukfivk+DlIgVoOAJbh qIWgvr3SIEuR6ayY3f5j0f2ejUMYlYYnKdiHXFlF9uXm1ELrb0YX4GMHz80nRmxvcmlhbiBG YWluZWxsaSA8Zi5mYWluZWxsaUBnbWFpbC5jb20+wmYEExECACYCGyMGCwkIBwMCBBUCCAME FgIDAQIeAQIXgAUCVF/S8QUJHlwd3wAKCRBhV5kVtWN2DvCVAJ4u4/bPF4P3jxb4qEY8I2gS 6hG0gACffNWlqJ2T4wSSn+3o7CCZNd7SLSDOw00ESM+4EhAQAL/o09boR9D3Vk1Tt7+gpYr3 WQ6hgYVON905q2ndEoA2J0dQxJNRw3snabHDDzQBAcqOvdi7YidfBVdKi0wxHhSuRBfuOppu pdXkb7zxuPQuSveCLqqZWRQ+Cc2QgF7SBqgznbe6Ngout5qXY5Dcagk9LqFNGhJQzUGHAsIs hap1f0B1PoUyUNeEInV98D8Xd/edM3mhO9nRpUXRK9Bvt4iEZUXGuVtZLT52nK6Wv2EZ1TiT OiqZlf1P+vxYLBx9eKmabPdm3yjalhY8yr1S1vL0gSA/C6W1o/TowdieF1rWN/MYHlkpyj9c Rpc281gAO0AP3V1G00YzBEdYyi0gaJbCEQnq8Vz1vDXFxHzyhgGz7umBsVKmYwZgA8DrrB0M oaP35wuGR3RJcaG30AnJpEDkBYHznI2apxdcuTPOHZyEilIRrBGzDwGtAhldzlBoBwE3Z3MY 31TOpACu1ZpNOMysZ6xiE35pWkwc0KYm4hJA5GFfmWSN6DniimW3pmdDIiw4Ifcx8b3mFrRO BbDIW13E51j9RjbO/nAaK9ndZ5LRO1B/8Fwat7bLzmsCiEXOJY7NNpIEpkoNoEUfCcZwmLrU +eOTPzaF6drw6ayewEi5yzPg3TAT6FV3oBsNg3xlwU0gPK3v6gYPX5w9+ovPZ1/qqNfOrbsE FRuiSVsZQ5s3AAMFD/9XjlnnVDh9GX/r/6hjmr4U9tEsM+VQXaVXqZuHKaSmojOLUCP/YVQo 7IiYaNssCS4FCPe4yrL4FJJfJAsbeyDykMN7wAnBcOkbZ9BPJPNCbqU6dowLOiy8AuTYQ48m vIyQ4Ijnb6GTrtxIUDQeOBNuQC/gyyx3nbL/lVlHbxr4tb6YkhkO6shjXhQh7nQb33FjGO4P WU11Nr9i/qoV8QCo12MQEo244RRA6VMud06y/E449rWZFSTwGqb0FS0seTcYNvxt8PB2izX+ HZA8SL54j479ubxhfuoTu5nXdtFYFj5Lj5x34LKPx7MpgAmj0H7SDhpFWF2FzcC1bjiW9mjW HaKaX23Awt97AqQZXegbfkJwX2Y53ufq8Np3e1542lh3/mpiGSilCsaTahEGrHK+lIusl6mz Joil+u3k01ofvJMK0ZdzGUZ/aPMZ16LofjFA+MNxWrZFrkYmiGdv+LG45zSlZyIvzSiG2lKy kuVag+IijCIom78P9jRtB1q1Q5lwZp2TLAJlz92DmFwBg1hyFzwDADjZ2nrDxKUiybXIgZp9 aU2d++ptEGCVJOfEW4qpWCCLPbOT7XBr+g/4H3qWbs3j/cDDq7LuVYIe+wchy/iXEJaQVeTC y5arMQorqTFWlEOgRA8OP47L9knl9i4xuR0euV6DChDrguup2aJVU8JPBBgRAgAPAhsMBQJU X9LxBQkeXB3fAAoJEGFXmRW1Y3YOj4UAn3nrFLPZekMeqX5aD/aq/dsbXSfyAKC45Go0YyxV HGuUuzv+GKZ6nsysJw== Message-ID: Date: Tue, 1 May 2018 10:03:47 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180430232049.GA25602@lunn.ch> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/30/2018 04:20 PM, Andrew Lunn wrote: >> +/* genphy_set_test - Make a PHY enter one of the standard IEEE defined >> + * test modes >> + * @phydev: the PHY device instance >> + * @test: the desired test mode >> + * @data: test specific data (none) >> + * >> + * This function makes the designated @phydev enter the desired standard >> + * 100BaseT2 or 1000BaseT test mode as defined in IEEE 802.3-2012 section TWO >> + * and THREE under 32.6.1.2.1 and 40.6.1.1.2 respectively >> + */ >> +int genphy_set_test(struct phy_device *phydev, >> + struct ethtool_phy_test *test, const u8 *data) >> +{ >> + u16 shift, base, bmcr = 0; >> + int ret; >> + >> + /* Exit test mode */ >> + if (test->mode == PHY_STD_TEST_MODE_NORMAL) { >> + ret = phy_read(phydev, MII_CTRL1000); >> + if (ret < 0) >> + return ret; >> + >> + ret &= ~GENMASK(15, 13); >> + >> + return phy_write(phydev, MII_CTRL1000, ret); >> + } > > Hi Florain > > I looked at the Marvell SDK for PHYs. It performs a soft reset after > swapping back to normal mode. I assume the broadcom PHY does not need > this? But maybe we can add it anyway? We certainly should reset the PHY, thanks! > >> + >> + switch (test->mode) { >> + case PHY_STD_TEST_MODE_100BASET2_1: >> + case PHY_STD_TEST_MODE_100BASET2_2: >> + case PHY_STD_TEST_MODE_100BASET2_3: >> + if (!(phydev->supported & PHY_100BT_FEATURES)) >> + return -EOPNOTSUPP; >> + >> + shift = 14; >> + base = test->mode - PHY_STD_TEST_MODE_NORMAL; >> + bmcr = BMCR_SPEED100; >> + break; >> + >> + case PHY_STD_TEST_MODE_1000BASET_1: >> + case PHY_STD_TEST_MODE_1000BASET_2: >> + case PHY_STD_TEST_MODE_1000BASET_3: >> + case PHY_STD_TEST_MODE_1000BASET_4: >> + if (!(phydev->supported & PHY_1000BT_FEATURES)) >> + return -EOPNOTSUPP; >> + >> + shift = 13; >> + base = test->mode - PHY_STD_TEST_MODE_100BASET2_MAX; >> + bmcr = BMCR_SPEED1000; >> + break; >> + >> + default: >> + /* Let an upper driver deal with additional modes it may >> + * support >> + */ >> + return -EOPNOTSUPP; >> + } >> + >> + /* Force speed and duplex */ >> + ret = phy_write(phydev, MII_BMCR, bmcr | BMCR_FULLDPLX); >> + if (ret < 0) >> + return ret; > > Should there be something to undo this when returning to normal mode? Yes, resetting the PHY would perform that. -- Florian