From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 29E87C282DD for ; Thu, 23 May 2019 11:46:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D59EA20851 for ; Thu, 23 May 2019 11:46:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="Lvt9jRIK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730619AbfEWLqi (ORCPT ); Thu, 23 May 2019 07:46:38 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:43422 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730485AbfEWLqh (ORCPT ); Thu, 23 May 2019 07:46:37 -0400 Received: by mail-pg1-f195.google.com with SMTP id f25so3008548pgv.10 for ; Thu, 23 May 2019 04:46:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=LEifsqwnL2BjXCVuqDW5HukFRG14FiPFkC5knaitSp8=; b=Lvt9jRIK0RxPlPR9Ydlr2C/j77GrQptj8vSfAUw8rYMnhtJa2cDk84ixTSGctwKty2 7nz5mlHIUD9kRcsLQScD+TJU1Dcp1leEw+1SGih4l+elbSJL3p4bHk7YbrJqWO7YvZZW HZOecpMOYn/eWKc2zdp17ipfC+L5hZeG8NJUlCkPE7oRmJSNv3ltNYXnNqhkzZO4Uejd Hw1tQSAunCp0MojMPQ5QkDfziBEmOKiyaeeAWMkJx1z9iQ5iF1O73qfg6T8QPavedq++ LOuw5PPoXzLkI8T52+98iKNiLjVcuxGrGfevv4SZm6YF/sp50q0k+ForMnDkWkLQcYu/ xptA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=LEifsqwnL2BjXCVuqDW5HukFRG14FiPFkC5knaitSp8=; b=oAs/iA6BQln9vmML4O1YdRjXUp9we0QT88MwF9kr93gLds+vtQJPJ4KVbcrBtRfs3U M0OwedB+pPl2TD+xT1EXhbZ6rsiXzxPY9rbOxoRzs25vH7qVEq4b4XMKZP1ISIVqiz5b 7zIaMOQKaZYy3z9uRtyfCgauwZKw8swlnbIbG7Z0tisfR+ovbJldKNM0gg9gbD3Huc7h CfcQQ8bPlw6qwaW94FH7XHa7e5esQGQK0jAYJpX+HjBK5aRJDC6kd+9d0y3vM6m6rfjE 9TPJWsdCyaG0hL/ECeOnRd+BOH5LN02UI6kLiM1Xwcp16O7VyTeP5824ULVxGB/3QRws BE2g== X-Gm-Message-State: APjAAAWCkul1XTEb9A0+KD+eT5g2wJCOzeBVLJFYQ+G+YJPNtfrJUctt wCi4/whkcBOeLozEjIYg1VySYw== X-Google-Smtp-Source: APXvYqwMvfCi1UIzA9Dds+oEz5UVeF7cNdI5wIi6tZxo8UilpLvQEX9DwAhALre6fjnUlMXi6ouUiA== X-Received: by 2002:a63:2ac9:: with SMTP id q192mr26316526pgq.144.1558611997020; Thu, 23 May 2019 04:46:37 -0700 (PDT) Received: from buildserver-90.open-silicon.com ([114.143.65.226]) by smtp.googlemail.com with ESMTPSA id l43sm565045pjb.7.2019.05.23.04.46.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 23 May 2019 04:46:36 -0700 (PDT) From: Yash Shah To: davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org Cc: robh+dt@kernel.org, mark.rutland@arm.com, nicolas.ferre@microchip.com, palmer@sifive.com, aou@eecs.berkeley.edu, ynezz@true.cz, paul.walmsley@sifive.com, sachin.ghadi@sifive.com, Yash Shah Subject: [PATCH 2/2] net: macb: Add support for SiFive FU540-C000 Date: Thu, 23 May 2019 17:15:52 +0530 Message-Id: <1558611952-13295-3-git-send-email-yash.shah@sifive.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1558611952-13295-1-git-send-email-yash.shah@sifive.com> References: <1558611952-13295-1-git-send-email-yash.shah@sifive.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The management IP block is tightly coupled with the Cadence MACB IP block on the FU540, and manages many of the boundary signals from the MACB IP. This patch only controls the tx_clk input signal to the MACB IP. Future patches may add support for monitoring or controlling other IP boundary signals. Signed-off-by: Yash Shah --- drivers/net/ethernet/cadence/macb_main.c | 118 +++++++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index c049410..a9e5227 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -10,6 +10,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include +#include #include #include #include @@ -40,6 +41,15 @@ #include #include "macb.h" +/* This structure is only used for MACB on SiFive FU540 devices */ +struct sifive_fu540_macb_mgmt { + void __iomem *reg; + unsigned long rate; + struct clk_hw hw; +}; + +static struct sifive_fu540_macb_mgmt *mgmt; + #define MACB_RX_BUFFER_SIZE 128 #define RX_BUFFER_MULTIPLE 64 /* bytes */ @@ -3903,6 +3913,113 @@ static int at91ether_init(struct platform_device *pdev) return 0; } +static unsigned long fu540_macb_tx_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return mgmt->rate; +} + +static long fu540_macb_tx_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + if (WARN_ON(rate < 2500000)) + return 2500000; + else if (rate == 2500000) + return 2500000; + else if (WARN_ON(rate < 13750000)) + return 2500000; + else if (WARN_ON(rate < 25000000)) + return 25000000; + else if (rate == 25000000) + return 25000000; + else if (WARN_ON(rate < 75000000)) + return 25000000; + else if (WARN_ON(rate < 125000000)) + return 125000000; + else if (rate == 125000000) + return 125000000; + + WARN_ON(rate > 125000000); + + return 125000000; +} + +static int fu540_macb_tx_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + rate = fu540_macb_tx_round_rate(hw, rate, &parent_rate); + iowrite32(rate != 125000000, mgmt->reg); + mgmt->rate = rate; + + return 0; +} + +static const struct clk_ops fu540_c000_ops = { + .recalc_rate = fu540_macb_tx_recalc_rate, + .round_rate = fu540_macb_tx_round_rate, + .set_rate = fu540_macb_tx_set_rate, +}; + +static int fu540_c000_clk_init(struct platform_device *pdev, struct clk **pclk, + struct clk **hclk, struct clk **tx_clk, + struct clk **rx_clk, struct clk **tsu_clk) +{ + struct clk_init_data init; + int err = 0; + + err = macb_clk_init(pdev, pclk, hclk, tx_clk, rx_clk, tsu_clk); + if (err) + return err; + + mgmt = devm_kzalloc(&pdev->dev, sizeof(*mgmt), GFP_KERNEL); + if (!mgmt) + return -ENOMEM; + + init.name = "sifive-gemgxl-mgmt"; + init.ops = &fu540_c000_ops; + init.flags = 0; + init.num_parents = 0; + + mgmt->rate = 0; + mgmt->hw.init = &init; + + *tx_clk = clk_register(NULL, &mgmt->hw); + if (IS_ERR(*tx_clk)) + return PTR_ERR(*tx_clk); + + err = clk_prepare_enable(*tx_clk); + if (err) + dev_err(&pdev->dev, "failed to enable tx_clk (%u)\n", err); + else + dev_info(&pdev->dev, "Registered clk switch '%s'\n", init.name); + + return 0; +} + +static int fu540_c000_init(struct platform_device *pdev) +{ + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) + return -ENODEV; + + mgmt->reg = ioremap(res->start, resource_size(res)); + if (!mgmt->reg) + return -ENOMEM; + + return macb_init(pdev); +} + +static const struct macb_config fu540_c000_config = { + .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | + MACB_CAPS_GEM_HAS_PTP, + .dma_burst_length = 16, + .clk_init = fu540_c000_clk_init, + .init = fu540_c000_init, + .jumbo_max_len = 10240, +}; + static const struct macb_config at91sam9260_config = { .caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, .clk_init = macb_clk_init, @@ -3980,6 +4097,7 @@ static int at91ether_init(struct platform_device *pdev) { .compatible = "cdns,at32ap7000-macb" }, { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config }, { .compatible = "cdns,macb" }, + { .compatible = "cdns,fu540-macb", .data = &fu540_c000_config }, { .compatible = "cdns,np4-macb", .data = &np4_config }, { .compatible = "cdns,pc302-gem", .data = &pc302gem_config }, { .compatible = "cdns,gem", .data = &pc302gem_config }, -- 1.9.1