From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from li153-180.members.linode.com ([109.74.206.180]:32865 "EHLO mail.tekno-soft.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750745AbcCBRNe (ORCPT ); Wed, 2 Mar 2016 12:13:34 -0500 Received: from dragon.tekno-soft.it (host142-53-static.94-94-b.business.telecomitalia.it [94.94.53.142]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: robyf@tekno-soft.it) by mail.tekno-soft.it (Postfix) with ESMTPSA id 3FFA117727 for ; Wed, 2 Mar 2016 17:13:30 +0000 (UTC) Subject: Re: iMX6q PCIe phy link never came up on kernel v4.4.x To: linux-pci@vger.kernel.org References: <56D5E3DF.9030906@tekno-soft.it> From: Roberto Fichera Message-ID: <56D71F27.7070708@tekno-soft.it> Date: Wed, 2 Mar 2016 18:13:11 +0100 MIME-Version: 1.0 In-Reply-To: <56D5E3DF.9030906@tekno-soft.it> Content-Type: text/plain; charset=utf-8 Sender: linux-pci-owner@vger.kernel.org List-ID: On 03/01/2016 07:47 PM, Roberto Fichera wrote: Sorry guy if I push a little bit about this, I've added some debugging code regarding my issue: [ 0.557268] imx6q-pcie 1ffc000.pcie: phy link never came up [ 0.557290] imx6q-pcie 1ffc000.pcie: LTSSM current state: 0x3 (S_POLL_COMPLIANCE) [ 0.557304] imx6q-pcie 1ffc000.pcie: PIPE transmit K indication: 1 [ 0.557318] imx6q-pcie 1ffc000.pcie: PIPE Transmit data: 0x4abc [ 0.557332] imx6q-pcie 1ffc000.pcie: Receiver is receiving logical idle: no [ 0.557345] imx6q-pcie 1ffc000.pcie: Second symbol is also idle (16-bit PHY interface only): no [ 0.557360] imx6q-pcie 1ffc000.pcie: Currently receiving k237 (PAD) in place of link number: no [ 0.557372] imx6q-pcie 1ffc000.pcie: Currently receiving k237 (PAD) in place of lane number: no [ 0.557385] imx6q-pcie 1ffc000.pcie: Link control bits advertised by link partner: 0xa [ 0.557398] imx6q-pcie 1ffc000.pcie: Receiver detected lane reversal: no [ 0.557410] imx6q-pcie 1ffc000.pcie: TS2 training sequence received: no [ 0.557422] imx6q-pcie 1ffc000.pcie: TS1 training sequence received: no [ 0.557434] imx6q-pcie 1ffc000.pcie: Receiver reports skip reception: no [ 0.557446] imx6q-pcie 1ffc000.pcie: LTSSM reports PHY link up: no [ 0.557460] imx6q-pcie 1ffc000.pcie: A skip ordered set has been transmitted: no [ 0.557474] imx6q-pcie 1ffc000.pcie: Link number advertised/confirmed by link partner: 68 [ 0.557487] imx6q-pcie 1ffc000.pcie: Application request to initiate training reset: no [ 0.557500] imx6q-pcie 1ffc000.pcie: PIPE transmit compliance request: no [ 0.557512] imx6q-pcie 1ffc000.pcie: PIPE transmit electrical idle request: no [ 0.557524] imx6q-pcie 1ffc000.pcie: PIPE receiver detect/loopback request: no [ 0.557536] imx6q-pcie 1ffc000.pcie: LTSSM-negotiated link reset: yes [ 0.557547] imx6q-pcie 1ffc000.pcie: LTSSM testing for polarity reversal: no [ 0.557559] imx6q-pcie 1ffc000.pcie: LTSSM performing link training: no [ 0.557572] imx6q-pcie 1ffc000.pcie: LTSSM in DISABLE state; link inoperable: no [ 0.557583] imx6q-pcie 1ffc000.pcie: Scrambling disabled for the link: no [ 0.558156] imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00 [ 0.558179] pci_bus 0000:00: root bus resource [bus 00-ff] [ 0.558197] pci_bus 0000:00: root bus resource [??? 0x01f00000-0x01f7ffff flags 0x0] [ 0.558212] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] [ 0.558226] pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff] [ 0.558346] pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400 [ 0.558468] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff] [ 0.558510] pci 0000:00:00.0: reg 0x38: [mem 0x00000000-0x0000ffff pref] [ 0.558708] pci 0000:00:00.0: supports D1 [ 0.558727] pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold [ 0.559495] PCI: bus0: Fast back to back transfers disabled [ 0.559834] PCI: bus1: Fast back to back transfers enabled [ 0.559997] pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff] [ 0.560025] pci 0000:00:00.0: BAR 6: assigned [mem 0x01100000-0x0110ffff pref] [ 0.560047] pci 0000:00:00.0: PCI bridge to [bus 01] [ 0.560812] pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt [ 0.560837] pcie_pme 0000:00:00.0:pcie01: service driver pcie_pme loaded Any idea what's going on? Thanks in advance, Roberto Fichera. > Hi There, > > Working on a custom iMX6q board I'm getting a PCIe phy link never came up, even if uboot seems detecting > everything ok. My DTS is enabling PCIe with > > &pcie { > pinctrl-names = "default"; > pinctrl-0 = <&pinctrl_pcie_reset>; > reset-gpio = <&gpio7 12 0>; > status = "okay"; > }; > > The PCIe is connected to a PCIe-to-PCI TI XIO2001. The XIO2001 power is controlled by GPIO_9 and > the corresponding fixed regulator is set as > > reg_pcie: regulator@4 { > compatible = "regulator-fixed"; > reg = <4>; > pinctrl-names = "default"; > pinctrl-0 = <&pinctrl_pcie_reg>; > regulator-name = "MPCIE_3V3"; > regulator-min-microvolt = <3300000>; > regulator-max-microvolt = <3300000>; > gpio = <&gpio1 9 0>; > regulator-always-on; > enable-active-high; > }; > > so I'd like to know if there is any other special setup to do in order to get it to work on a v4.4.x kernel. > Or anyway how to debug it. > > Any suggestion? > > Thanks in advance, > Roberto Fichera. > > U-Boot 2014.04-imx_v2014.04_3.14.38_6qp_beta+g6e9282c (Feb 15 2016 - 10:02:31) > > CPU: Freescale i.MX6Q rev1.5 at 792 MHz > CPU: Temperature 35 C, calibration data: 0x5664d569 > Reset cause: POR > Board: Janas iMX6Q (ID:e315c064140749d4) > I2C: ready > DRAM: 2 GiB > MMC: FSL_SDHC: 0, FSL_SDHC: 1 > *** Warning - bad CRC, using default environment > > 00:01.0 - 16c3:abcd - Bridge device > 01:00.0 - 104c:8240 - Bridge device > 02:04.0 - 1397:08b4 - Network controller > In: serial > Out: serial > Err: serial > Found PFUZE100! deviceid=10,revid=21 > mmc1(part 0) is current device > Net: FEC [PRIME] > Warning: failed to set MAC address > > Normal Boot > .... > .... > [ 0.236141] PCI host bridge /soc/pcie@0x01000000 ranges: > [ 0.236162] No bus range found for /soc/pcie@0x01000000, using [bus 00-ff] > [ 0.236213] err 0x01f00000..0x01f7ffff -> 0x01f00000 > [ 0.236250] IO 0x01f80000..0x01f8ffff -> 0x00000000 > [ 0.236330] MEM 0x01000000..0x01efffff -> 0x01000000 > -->>> [ 0.546690] imx6q-pcie 1ffc000.pcie: phy link never came up > [ 0.547263] imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00 > [ 0.547287] pci_bus 0000:00: root bus resource [bus 00-ff] > [ 0.547304] pci_bus 0000:00: root bus resource [??? 0x01f00000-0x01f7ffff flags 0x0] > [ 0.547321] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] > [ 0.547335] pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff] > [ 0.548608] PCI: bus0: Fast back to back transfers disabled > [ 0.548950] PCI: bus1: Fast back to back transfers enabled > [ 0.549107] pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff] > [ 0.549137] pci 0000:00:00.0: BAR 6: assigned [mem 0x01100000-0x0110ffff pref] > [ 0.549159] pci 0000:00:00.0: PCI bridge to [bus 01] > [ 0.549945] pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt > ... > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >