From patchwork Tue Mar 25 17:26:14 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartlomiej Zolnierkiewicz X-Patchwork-Id: 3889011 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 49ED6BF540 for ; Tue, 25 Mar 2014 17:29:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4EAE620172 for ; Tue, 25 Mar 2014 17:29:23 +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 21C3620158 for ; Tue, 25 Mar 2014 17:29:22 +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 1WSV8p-00055C-9w; Tue, 25 Mar 2014 17:28:00 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WSV8Z-0003SJ-HY; Tue, 25 Mar 2014 17:27:43 +0000 Received: from mailout4.samsung.com ([203.254.224.34]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WSV86-0003OL-F3 for linux-arm-kernel@lists.infradead.org; Tue, 25 Mar 2014 17:27:17 +0000 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N3000KGL5SQF050@mailout4.samsung.com> for linux-arm-kernel@lists.infradead.org; Wed, 26 Mar 2014 02:26:50 +0900 (KST) X-AuditID: cbfee61a-b7fb26d00000724f-73-5331bc5a2e4e Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id F1.72.29263.A5CB1335; Wed, 26 Mar 2014 02:26:50 +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 <0N3000CBN5S1SZA0@mmp1.samsung.com>; Wed, 26 Mar 2014 02:26:50 +0900 (KST) From: Bartlomiej Zolnierkiewicz To: Tejun Heo Subject: [PATCH v3 3/4] ata: add new-style AHCI platform driver for DaVinci DA850 AHCI controller Date: Tue, 25 Mar 2014 18:26:14 +0100 Message-id: <1395768375-21123-4-git-send-email-b.zolnierkie@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-reply-to: <1395768375-21123-1-git-send-email-b.zolnierkie@samsung.com> References: <1395768375-21123-1-git-send-email-b.zolnierkie@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrJLMWRmVeSWpSXmKPExsVy+t9jAd2oPYbBBl+eiFhsnLGe1eLcrQZW izfHpzNZ3FnBbLHp8TVWi2M7HjFZXN41h81if+8GJouG7h52izkzNrNa/Fp+lNFi5cW/zA48 Htdf/Wfy2DnrLrvHplWdbB5zpjWxeJy8cJLFY/OSeo/3+66yefRtWcXo8fTHXmaP4ze2M3l8 3iQXwB3FZZOSmpNZllqkb5fAlfHwzC+Wgt16FdePfGFtYDyq1sXIySEhYCIx6/Z+RghbTOLC vfVsXYxcHEICixgluv/3s4EkhAS6mCRevNIEsdkErCQmtq8CaxARkJW4Mu0hI0gDs0AXs8SS 2VvAEsICyRIPDuwHa2YRUJX4efo0E4jNK+Ahcar5FhPENkWJ7mcTwGo4BTwlDn66yA6xzENi 5YK5TBMYeRcwMqxiFE0tSC4oTkrPNdQrTswtLs1L10vOz93ECA7gZ1I7GFc2WBxiFOBgVOLh nTDBMFiINbGsuDL3EKMEB7OSCK/CBqAQb0piZVVqUX58UWlOavEhRmkOFiVx3gOt1oFCAumJ JanZqakFqUUwWSYOTqkGxhrjXD7ZkquJkTM42Rd/Y76bbphyo/LZm8UnXZ98MOSNr17R7Prs TkF55tN18wVeZv+0Mb7e/u+yRfudIzJ5IdIh3+3aVtT9Wu9mwa63KbT8Cpu18x7jR7Z366xm eaxaWmhk+PWLZvLnrso0lxfs680MJuete7U8obXTY65dcnT3TpZyhe3LlViKMxINtZiLihMB NKaS01wCAAA= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140325_132714_788607_FFB53F12 X-CRM114-Status: GOOD ( 21.22 ) 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 --- 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 371e8890..4b71e73 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 6123e64..0646d83 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");