From patchwork Wed Dec 9 11:22:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Russell King \(Oracle\)" X-Patchwork-Id: 341751 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D311BC433FE for ; Wed, 9 Dec 2020 11:23:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E570233A1 for ; Wed, 9 Dec 2020 11:23:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730638AbgLILXq (ORCPT ); Wed, 9 Dec 2020 06:23:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730632AbgLILXq (ORCPT ); Wed, 9 Dec 2020 06:23:46 -0500 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6B35C0613CF for ; Wed, 9 Dec 2020 03:22:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=+B4cFN3FlgVMFy6Czw8DG/Up4/75wVsdNfIhC7oCzks=; b=wH/dvjK4948iKw6lGGlQ/+ul2k hEl2zbX3ggFAqIvmGp7pq7tCCo02L1hnT1PTv9ljc7F7SAfbhtKm98JVPX4yukRj7/mYr5RSpOHh0 uBc2FJCFMo6Xaj/aFR29kamXZ/MezgamQkmt7K3WglxjdZu28eFLLlcfLmkvNffRa5K3SVVvTKDq0 nYvIG/MaoQy8pCQ3cShmgWYep0jFDybqoXUecTJEttCAHVz83DWTR8FXnm72yoSO4XsFcgijs44Uv VrQkKknd1Ws5Ioc+Qpjh/+5LrhjKnVsNQXykaKJ0Baxb2ZnzfNm4zk3KtRYC1ezG5qCANJNXisbz/ 1r7osCiw==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:52476 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kmxYX-0002JP-Fs; Wed, 09 Dec 2020 11:22:49 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1kmxYX-0001cP-6b; Wed, 09 Dec 2020 11:22:49 +0000 In-Reply-To: <20201209112152.GT1551@shell.armlinux.org.uk> References: <20201209112152.GT1551@shell.armlinux.org.uk> From: Russell King To: Andrew Lunn , Heiner Kallweit Cc: Pali Rohar , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org Subject: [PATCH net-next 1/2] net: sfp: VSOL V2801F / CarlitoxxPro CPGOS03-0490 v2.0 workaround MIME-Version: 1.0 MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: "Russell King,,," Date: Wed, 09 Dec 2020 11:22:49 +0000 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add a workaround for the detection of VSOL V2801F / CarlitoxxPro CPGOS03-0490 v2.0 GPON module which CarlitoxxPro states needs single byte I2C reads to the EEPROM. Pali Rohár reports that he also has a CarlitoxxPro-based V2801F module, which reports a manufacturer of "OEM". This manufacturer can't be matched as it appears in many different modules, so also match the part number too. Reported-by: Thomas Schreiber Reported-by: Pali Rohár Tested-by: Pali Rohár Reviewed-by: Andrew Lunn Signed-off-by: Russell King --- drivers/net/phy/sfp.c | 63 +++++++++++++++++++++++++++++++++++++++---- 1 file changed, 58 insertions(+), 5 deletions(-) diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 34aa196b7465..91d74c1a920a 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -219,6 +219,7 @@ struct sfp { struct sfp_bus *sfp_bus; struct phy_device *mod_phy; const struct sff_data *type; + size_t i2c_block_size; u32 max_power_mW; unsigned int (*get_state)(struct sfp *); @@ -335,10 +336,19 @@ static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, size_t len) { struct i2c_msg msgs[2]; - u8 bus_addr = a2 ? 0x51 : 0x50; + size_t block_size; size_t this_len; + u8 bus_addr; int ret; + if (a2) { + block_size = 16; + bus_addr = 0x51; + } else { + block_size = sfp->i2c_block_size; + bus_addr = 0x50; + } + msgs[0].addr = bus_addr; msgs[0].flags = 0; msgs[0].len = 1; @@ -350,8 +360,8 @@ static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, while (len) { this_len = len; - if (this_len > 16) - this_len = 16; + if (this_len > block_size) + this_len = block_size; msgs[1].len = this_len; @@ -1632,6 +1642,28 @@ static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) return 0; } +/* Some modules (Nokia 3FE46541AA) lock up if byte 0x51 is read as a + * single read. Switch back to reading 16 byte blocks unless we have + * a CarlitoxxPro module (rebranded VSOL V2801F). Even more annoyingly, + * some VSOL V2801F have the vendor name changed to OEM. + */ +static int sfp_quirk_i2c_block_size(const struct sfp_eeprom_base *base) +{ + if (!memcmp(base->vendor_name, "VSOL ", 16)) + return 1; + if (!memcmp(base->vendor_name, "OEM ", 16) && + !memcmp(base->vendor_pn, "V2801F ", 16)) + return 1; + + /* Some modules can't cope with long reads */ + return 16; +} + +static void sfp_quirks_base(struct sfp *sfp, const struct sfp_eeprom_base *base) +{ + sfp->i2c_block_size = sfp_quirk_i2c_block_size(base); +} + static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) { u8 check; @@ -1673,14 +1705,20 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) u8 check; int ret; - ret = sfp_read(sfp, false, 0, &id, sizeof(id)); + /* Some modules (CarlitoxxPro CPGOS03-0490) do not support multibyte + * reads from the EEPROM, so start by reading the base identifying + * information one byte at a time. + */ + sfp->i2c_block_size = 1; + + ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); if (ret < 0) { if (report) dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); return -EAGAIN; } - if (ret != sizeof(id)) { + if (ret != sizeof(id.base)) { dev_err(sfp->dev, "EEPROM short read: %d\n", ret); return -EAGAIN; } @@ -1719,6 +1757,21 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) } } + /* Apply any early module-specific quirks */ + sfp_quirks_base(sfp, &id.base); + + ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); + if (ret < 0) { + if (report) + dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); + return -EAGAIN; + } + + if (ret != sizeof(id.ext)) { + dev_err(sfp->dev, "EEPROM short read: %d\n", ret); + return -EAGAIN; + } + check = sfp_check(&id.ext, sizeof(id.ext) - 1); if (check != id.ext.cc_ext) { if (cotsworks) {