From patchwork Tue Mar 25 18:51:40 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartlomiej Zolnierkiewicz X-Patchwork-Id: 3890071 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 79033BF540 for ; Tue, 25 Mar 2014 18:54:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7B594201BC for ; Tue, 25 Mar 2014 18:54:40 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (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 53FAD20173 for ; Tue, 25 Mar 2014 18:54:39 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WSWTR-0001CG-NP; Tue, 25 Mar 2014 18:53:22 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WSWT9-0006RE-4U; Tue, 25 Mar 2014 18:53:03 +0000 Received: from mailout3.samsung.com ([203.254.224.33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WSWSf-0006L3-7F for linux-arm-kernel@lists.infradead.org; Tue, 25 Mar 2014 18:52:35 +0000 Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout3.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N3000LLQ9QV5ZA0@mailout3.samsung.com> for linux-arm-kernel@lists.infradead.org; Wed, 26 Mar 2014 03:52:07 +0900 (KST) X-AuditID: cbfee61b-b7f456d000006dfd-1c-5331d0569ad1 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 39.4B.28157.650D1335; Wed, 26 Mar 2014 03:52:07 +0900 (KST) Received: from mcdsrvbld02.digital.local ([106.116.37.23]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N3000J1S9Q7U6A0@mmp1.samsung.com>; Wed, 26 Mar 2014 03:52:06 +0900 (KST) From: Bartlomiej Zolnierkiewicz To: Tejun Heo Subject: [PATCH v4 3/4] ata: add new-style AHCI platform driver for DaVinci DA850 AHCI controller Date: Tue, 25 Mar 2014 19:51:40 +0100 Message-id: <1395773501-6663-4-git-send-email-b.zolnierkie@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-reply-to: <1395773501-6663-1-git-send-email-b.zolnierkie@samsung.com> References: <1395773501-6663-1-git-send-email-b.zolnierkie@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrBLMWRmVeSWpSXmKPExsVy+t9jAd3wC4bBBn/fM1tsnLGe1eLcrQZW izfHpzNZ3FnBbLHp8TVWi2M7HjFZXN41h81if+8GJouG7h52izkzNrNa/Fp+lNFi5cW/zA48 Htdf/Wfy2DnrLrvHplWdbB5zpjWxeJy8cJLFY/OSeo/3+66yefRtWcXo8fTHXmaP4ze2M3l8 3iQXwB3FZZOSmpNZllqkb5fAldFz6i1bwVm9ike3TrE0MF5U62Lk4JAQMJFY0GvZxcgJZIpJ XLi3nq2LkYtDSGARo8SVP4tYQRJCAl1MEndmCYHYbAJWEhPbVzGC2CICshJXpj1kBGlgFuhi llgyewtYQlggWeLzhp9sIDaLgKpE+5MLYDavgLvEsdvb2SC2KUp0P5sAZnMKeEj8v7eOCWKZ u8SZefPZJjDyLmBkWMUomlqQXFCclJ5rpFecmFtcmpeul5yfu4kRHL7PpHcwrmqwOMQowMGo xMNr0WcYLMSaWFZcmXuIUYKDWUmE9+9JoBBvSmJlVWpRfnxRaU5q8SFGaQ4WJXHeg63WgUIC 6YklqdmpqQWpRTBZJg5OqQbGgBt9YfPO3pqRErzG572eQOLV/6Lr7A5Y6O3+0yPbFK//cluw 6MmDb6Seh1fpeyX9iJXaFJHhu0+rSJVh146CN6zHFyilzzguaiPFzOnAanXDbWGVjFOFw0Yr Me/gLU3PU2R5Ze9uapbc7vNwm/TDSYrGH24nzLljUny5fyu7+/Xw+asu2nApsRRnJBpqMRcV JwIA/+d3QVsCAAA= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140325_145233_589421_0B029AFB X-CRM114-Status: GOOD ( 20.83 ) X-Spam-Score: -7.3 (-------) Cc: davinci-linux-open-source@linux.davincidsp.com, linux-ide@vger.kernel.org, Kevin Hilman , Shiraz Hashim , spear-devel@list.st.com, Sekhar Nori , linux-kernel@vger.kernel.org, Hans de Goede , b.zolnierkie@samsung.com, Viresh Kumar , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 Add the new ahci_da850 host driver. Platform changes needed to make DaVinci DA850 SATA AHCI support fully functional are in the separate "ARM: davinci: da850: update SATA AHCI support" commit. Please note that this driver doesn't have the superfluous clock control code as clock is already handled by the generic AHCI platform library code. Cc: Sekhar Nori Cc: Kevin Hilman Cc: Hans de Goede Signed-off-by: Bartlomiej Zolnierkiewicz --- v4: - no changes v3: - merged changes from Sekhar - splitted out platform changes into separate patch v2: - dropped the experimental tag from the config option help - fixed SYSCFG1 memory resource handling - hardcoded the multiplier data and added a note about it - used readl()/writel() instead of __raw_readl()/__raw_writel() - dropped the superflous clock control - cleaned up da850_sata_init() - changed the platform device name and removed the platform ids table - removed the deprecated ahci_platform_data platform code - updated the patch description drivers/ata/Kconfig | 9 ++++ drivers/ata/Makefile | 1 + drivers/ata/ahci_da850.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 124 insertions(+) create mode 100644 drivers/ata/ahci_da850.c diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index b3b24f2..7251559 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -97,6 +97,15 @@ config SATA_AHCI_PLATFORM If unsure, say N. +config AHCI_DA850 + tristate "DaVinci DA850 AHCI SATA support" + depends on ARCH_DAVINCI_DA850 + help + This option enables support for the DaVinci DA850 SoC's + onboard AHCI SATA. + + If unsure, say N. + config AHCI_ST tristate "ST AHCI SATA support" depends on ARCH_STI diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index 5fa79ab..44c8016 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o obj-$(CONFIG_SATA_SIL24) += sata_sil24.o obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o +obj-$(CONFIG_AHCI_DA850) += ahci_da850.o libahci.o libahci_platform.o obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o diff --git a/drivers/ata/ahci_da850.c b/drivers/ata/ahci_da850.c new file mode 100644 index 0000000..2c83613 --- /dev/null +++ b/drivers/ata/ahci_da850.c @@ -0,0 +1,114 @@ +/* + * DaVinci DA850 AHCI SATA platform driver + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include "ahci.h" + +/* SATA PHY Control Register offset from AHCI base */ +#define SATA_P0PHYCR_REG 0x178 + +#define SATA_PHY_MPY(x) ((x) << 0) +#define SATA_PHY_LOS(x) ((x) << 6) +#define SATA_PHY_RXCDR(x) ((x) << 10) +#define SATA_PHY_RXEQ(x) ((x) << 13) +#define SATA_PHY_TXSWING(x) ((x) << 19) +#define SATA_PHY_ENPLL(x) ((x) << 31) + +/* + * The multiplier needed for 1.5GHz PLL output. + * + * NOTE: This is currently hardcoded to be suitable for 100MHz crystal + * frequency (which is used by DA850 EVM board) and may need to be changed + * if you would like to use this driver on some other board. + */ +#define DA850_SATA_CLK_MULTIPLIER 7 + +static void da850_sata_init(struct device *dev, void __iomem *pwrdn_reg, + void __iomem *ahci_base) +{ + unsigned int val; + + /* Enable SATA clock receiver */ + val = readl(pwrdn_reg); + val &= ~BIT(0); + writel(val, pwrdn_reg); + + val = SATA_PHY_MPY(DA850_SATA_CLK_MULTIPLIER + 1) | SATA_PHY_LOS(1) | + SATA_PHY_RXCDR(4) | SATA_PHY_RXEQ(1) | SATA_PHY_TXSWING(3) | + SATA_PHY_ENPLL(1); + + writel(val, ahci_base + SATA_P0PHYCR_REG); +} + +static const struct ata_port_info ahci_da850_port_info = { + .flags = AHCI_FLAG_COMMON, + .pio_mask = ATA_PIO4, + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_platform_ops, +}; + +static int ahci_da850_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ahci_host_priv *hpriv; + struct resource *res; + void __iomem *pwrdn_reg; + int rc; + + hpriv = ahci_platform_get_resources(pdev); + if (IS_ERR(hpriv)) + return PTR_ERR(hpriv); + + rc = ahci_platform_enable_resources(hpriv); + if (rc) + return rc; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) + goto disable_resources; + + pwrdn_reg = devm_ioremap(dev, res->start, resource_size(res)); + if (!pwrdn_reg) + goto disable_resources; + + da850_sata_init(dev, pwrdn_reg, hpriv->mmio); + + rc = ahci_platform_init_host(pdev, hpriv, &ahci_da850_port_info, 0, 0); + if (rc) + goto disable_resources; + + return 0; +disable_resources: + ahci_platform_disable_resources(hpriv); + return rc; +} + +static SIMPLE_DEV_PM_OPS(ahci_da850_pm_ops, ahci_platform_suspend, + ahci_platform_resume); + +static struct platform_driver ahci_da850_driver = { + .probe = ahci_da850_probe, + .remove = ata_platform_remove_one, + .driver = { + .name = "ahci_da850", + .owner = THIS_MODULE, + .pm = &ahci_da850_pm_ops, + }, +}; +module_platform_driver(ahci_da850_driver); + +MODULE_DESCRIPTION("DaVinci DA850 AHCI SATA platform driver"); +MODULE_AUTHOR("Bartlomiej Zolnierkiewicz "); +MODULE_LICENSE("GPL");