From patchwork Thu Apr 23 02:59:09 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Brian Norris X-Patchwork-Id: 6259611 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id F07969F313 for ; Thu, 23 Apr 2015 03:04:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BFA052043C for ; Thu, 23 Apr 2015 03:04:27 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9B93320430 for ; Thu, 23 Apr 2015 03:04:26 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yl7P0-0002Y0-OC; Thu, 23 Apr 2015 03:02:10 +0000 Received: from mail-pd0-x22e.google.com ([2607:f8b0:400e:c02::22e]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yl7O8-0002Ao-Fc for linux-arm-kernel@lists.infradead.org; Thu, 23 Apr 2015 03:01:18 +0000 Received: by pdbqd1 with SMTP id qd1so5780701pdb.2 for ; Wed, 22 Apr 2015 20:00:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=gqP6iI+vgTbBmpQRzancH7wN4JPE9bN89FDkLjNkThM=; b=QIx19uGiIUdQoIsVvbk9uhHH6rxND9VPWBv3Q38AvbxZyWr9wRTBR4WMf4krd/Cz+i 8t1IJuPT96snBvSfoXljlM10rJ1aJiAHSjvSEymdU73KQI2uYBii6xU8uBjpC7oc25zM u9pRvR7MRrPrg13PmiPwtLzlPPaXJoL3C9vJzYGazX04aoqWZMENaEUkUPDl0zJD83PS XreTP3Qqqq1FYxO2T8lpTxEgf1WT7EE6Df/dLQ95++godNcySL4tzYfMT27pH2kr5pvJ B3RzwvPpXs2rxApMGmL80xlCMuPApGd4VVE0KFN/zQXdwfAdfVB8SVs+hv9RAyg1SYqw CjuA== X-Received: by 10.66.227.169 with SMTP id sb9mr1203627pac.11.1429758054607; Wed, 22 Apr 2015 20:00:54 -0700 (PDT) Received: from ld-irv-0074.broadcom.com (5520-maca-inet1-outside.broadcom.com. [216.31.211.11]) by mx.google.com with ESMTPSA id by13sm6431442pdb.37.2015.04.22.20.00.52 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 22 Apr 2015 20:00:53 -0700 (PDT) From: Brian Norris To: Tejun Heo , Kishon Vijay Abraham I Subject: [PATCH v2 4/5] phy: add Broadcom SATA3 PHY driver for Broadcom STB SoCs Date: Wed, 22 Apr 2015 19:59:09 -0700 Message-Id: <1429757950-28789-5-git-send-email-computersforpeace@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1429757950-28789-1-git-send-email-computersforpeace@gmail.com> References: <1429757950-28789-1-git-send-email-computersforpeace@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150422_200116_622114_A6F1D102 X-CRM114-Status: GOOD ( 17.86 ) X-Spam-Score: -0.8 (/) Cc: Mark Rutland , devicetree@vger.kernel.org, Hans de Goede , Florian Fainelli , Pawel Moll , Ian Campbell , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, Rob Herring , bcm-kernel-feedback-list@broadcom.com, Gregory Fong , Kumar Gala , Brian Norris , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Supports up to two ports which can each be powered on/off and configured independently. Signed-off-by: Brian Norris --- v2: - stop sharing SATA_TOP_CTRL registers with SATA driver - kill custom xlate function drivers/phy/Kconfig | 9 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-brcmstb-sata.c | 216 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 226 insertions(+) create mode 100644 drivers/phy/phy-brcmstb-sata.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 2962de205ba7..c8b22074bcf6 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -291,4 +291,13 @@ config PHY_QCOM_UFS help Support for UFS PHY on QCOM chipsets. +config PHY_BRCMSTB_SATA + tristate "Broadcom STB SATA PHY driver" + depends on ARCH_BRCMSTB + depends on OF + select GENERIC_PHY + help + Enable this to support the SATA3 PHY on 28nm Broadcom STB SoCs. + Likely useful only with CONFIG_SATA_BRCMSTB enabled. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index f080e1bb2a74..28a10804b4f4 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -38,3 +38,4 @@ obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-20nm.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o +obj-$(CONFIG_PHY_BRCMSTB_SATA) += phy-brcmstb-sata.o diff --git a/drivers/phy/phy-brcmstb-sata.c b/drivers/phy/phy-brcmstb-sata.c new file mode 100644 index 000000000000..8387c8cbea8c --- /dev/null +++ b/drivers/phy/phy-brcmstb-sata.c @@ -0,0 +1,216 @@ +/* + * Broadcom SATA3 AHCI Controller PHY Driver + * + * Copyright © 2009-2015 Broadcom Corporation + * + * 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, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SATA_MDIO_BANK_OFFSET 0x23c +#define SATA_MDIO_REG_OFFSET(ofs) ((ofs) * 4) +#define SATA_MDIO_REG_SPACE_SIZE 0x1000 +#define SATA_MDIO_REG_LENGTH 0x1f00 + +#define MAX_PORTS 2 + +/* Register offset between PHYs in PCB space */ +#define SATA_MDIO_REG_SPACE_SIZE 0x1000 + +struct brcm_sata_port { + int portnum; + struct phy *phy; + struct brcm_sata_phy *phy_priv; + bool ssc_en; +}; + +struct brcm_sata_phy { + struct device *dev; + void __iomem *phy_base; + + struct brcm_sata_port phys[MAX_PORTS]; +}; + +enum sata_mdio_phy_regs_28nm { + PLL_REG_BANK_0 = 0x50, + PLL_REG_BANK_0_PLLCONTROL_0 = 0x81, + + TXPMD_REG_BANK = 0x1a0, + TXPMD_CONTROL1 = 0x81, + TXPMD_CONTROL1_TX_SSC_EN_FRC = BIT(0), + TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL = BIT(1), + TXPMD_TX_FREQ_CTRL_CONTROL1 = 0x82, + TXPMD_TX_FREQ_CTRL_CONTROL2 = 0x83, + TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK = 0x3ff, + TXPMD_TX_FREQ_CTRL_CONTROL3 = 0x84, + TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK = 0x3ff, +}; + +static inline void __iomem *brcm_sata_phy_base(struct brcm_sata_port *port) +{ + struct brcm_sata_phy *priv = port->phy_priv; + + return priv->phy_base + (port->portnum * SATA_MDIO_REG_SPACE_SIZE); +} + +static void brcm_sata_mdio_wr(void __iomem *addr, u32 bank, u32 ofs, + u32 msk, u32 value) +{ + u32 tmp; + + writel(bank, addr + SATA_MDIO_BANK_OFFSET); + tmp = readl(addr + SATA_MDIO_REG_OFFSET(ofs)); + tmp = (tmp & msk) | value; + writel(tmp, addr + SATA_MDIO_REG_OFFSET(ofs)); +} + +/* These defaults were characterized by H/W group */ +#define FMIN_VAL_DEFAULT 0x3df +#define FMAX_VAL_DEFAULT 0x3df +#define FMAX_VAL_SSC 0x83 + +static void cfg_ssc_28nm(struct brcm_sata_port *port) +{ + void __iomem *base = brcm_sata_phy_base(port); + struct brcm_sata_phy *priv = port->phy_priv; + u32 tmp; + + /* override the TX spread spectrum setting */ + tmp = TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL | TXPMD_CONTROL1_TX_SSC_EN_FRC; + brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_CONTROL1, ~tmp, tmp); + + /* set fixed min freq */ + brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL2, + ~TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK, + FMIN_VAL_DEFAULT); + + /* set fixed max freq depending on SSC config */ + if (port->ssc_en) { + dev_info(priv->dev, "enabling SSC on port %d\n", port->portnum); + tmp = FMAX_VAL_SSC; + } else { + tmp = FMAX_VAL_DEFAULT; + } + + brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL3, + ~TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK, tmp); +} + +static int brcm_sata_phy_init(struct phy *phy) +{ + struct brcm_sata_port *port = phy_get_drvdata(phy); + + cfg_ssc_28nm(port); + + return 0; +} + +static struct phy_ops phy_ops_28nm = { + .init = brcm_sata_phy_init, + .owner = THIS_MODULE, +}; + +static const struct of_device_id brcm_sata_phy_of_match[] = { + { .compatible = "brcm,bcm7445-sata-phy" }, + {}, +}; +MODULE_DEVICE_TABLE(of, brcm_sata_phy_of_match); + +static int brcm_sata_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *dn = dev->of_node, *child; + struct brcm_sata_phy *priv; + struct resource *res; + struct phy_provider *provider; + int count = 0; + + if (of_get_child_count(dn) == 0) + return -ENODEV; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + dev_set_drvdata(dev, priv); + priv->dev = dev; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy"); + priv->phy_base = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->phy_base)) + return PTR_ERR(priv->phy_base); + + for_each_available_child_of_node(dn, child) { + unsigned int id; + struct brcm_sata_port *port; + + if (of_property_read_u32(child, "reg", &id)) { + dev_err(dev, "missing reg property in node %s\n", + child->name); + return -EINVAL; + } + + if (id >= MAX_PORTS) { + dev_err(dev, "invalid reg: %u\n", id); + return -EINVAL; + } + if (priv->phys[id].phy) { + dev_err(dev, "already registered port %u\n", id); + return -EINVAL; + } + + port = &priv->phys[id]; + port->portnum = id; + port->phy_priv = priv; + port->phy = devm_phy_create(dev, child, &phy_ops_28nm); + port->ssc_en = of_property_read_bool(child, "brcm,enable-ssc"); + if (IS_ERR(port->phy)) { + dev_err(dev, "failed to create PHY\n"); + return PTR_ERR(port->phy); + } + + phy_set_drvdata(port->phy, port); + count++; + } + + provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(provider)) { + dev_err(dev, "could not register PHY provider\n"); + return PTR_ERR(provider); + } + + dev_info(dev, "registered %d port(s)\n", count); + + return 0; +} + +static struct platform_driver brcm_sata_phy_driver = { + .probe = brcm_sata_phy_probe, + .driver = { + .of_match_table = brcm_sata_phy_of_match, + .name = "brcmstb-sata-phy", + } +}; +module_platform_driver(brcm_sata_phy_driver); + +MODULE_DESCRIPTION("Broadcom STB SATA PHY driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Marc Carino"); +MODULE_AUTHOR("Brian Norris"); +MODULE_ALIAS("platform:phy-brcmstb-sata");