From patchwork Tue Oct 9 11:48:51 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasanth Ananthan X-Patchwork-Id: 190288 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 5C3DD2C009A for ; Tue, 9 Oct 2012 22:46:37 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753024Ab2JILqg (ORCPT ); Tue, 9 Oct 2012 07:46:36 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:63167 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752534Ab2JILqf (ORCPT ); Tue, 9 Oct 2012 07:46:35 -0400 Received: by mail-pb0-f46.google.com with SMTP id rr4so5068925pbb.19 for ; Tue, 09 Oct 2012 04:46:35 -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:x-mailer:in-reply-to:references; bh=ts1RqHoW202oFiJy5dhHQbFNIp0JCvNvUusyoYojVBs=; b=cZGcsFtgwhB3YMa0lLcmsOx7peqKMxf/7ZlF5IJqbOHDeIliaeQ7xZIERDwpOQqwfk 5/h7B+djdcS1gaaay1ZyqTOHbavMR76bGaUoYXodcMy4/s1W19dquAMr8YRMNsb6/9v9 GH5Uu+z7P8b2QWPcBUOzZkk9RaehvSMzE7mAKV5tjFj1MR8H8Rg/jg2Lin/ernnm+h/1 t0mV+tnPbR4Kui62SKnB8bCBDFAqa6jd7LQJZ7cLAwNxPiZvBCGOaW93ii2sxCoEmvsX CRqvryApW2FCbQkEVNbyT330idFqiHZERwF5a4JFIpkV0yCZz7128e2HleEdH0TvKL9P xCrg== Received: by 10.68.200.72 with SMTP id jq8mr62372375pbc.38.1349783194946; Tue, 09 Oct 2012 04:46:34 -0700 (PDT) Received: from localhost.localdomain ([115.113.119.130]) by mx.google.com with ESMTPS id ka4sm12288231pbc.61.2012.10.09.04.46.31 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 04:46:34 -0700 (PDT) From: Vasanth Ananthan To: kgene.kim@samsung.com, jgarzik@pobox.com, linux@arm.linux.org.uk Cc: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-ide@vger.kernel.org, thomas.abraham@linaro.org, Vasanth Ananthan , Vasanth Ananthan Subject: [PATCH 5/6] ARM: EYNOS5: SATA controller driver Date: Tue, 9 Oct 2012 17:18:51 +0530 Message-Id: <1349783332-18467-6-git-send-email-vasanthananthan@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1349783332-18467-1-git-send-email-vasanthananthan@gmail.com> References: <1349783332-18467-1-git-send-email-vasanthananthan@gmail.com> Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org This patch adds a platform driver for SATA controller. Signed-off-by: Vasanth Ananthan --- arch/arm/mach-exynos/include/mach/regs-pmu.h | 3 + drivers/ata/Makefile | 2 +- drivers/ata/sata_exynos.c | 274 ++++++++++++++++++++++++++ 3 files changed, 278 insertions(+), 1 deletions(-) create mode 100644 drivers/ata/sata_exynos.c diff --git a/arch/arm/mach-exynos/include/mach/regs-pmu.h b/arch/arm/mach-exynos/include/mach/regs-pmu.h index d4e392b..3716ce8 100644 --- a/arch/arm/mach-exynos/include/mach/regs-pmu.h +++ b/arch/arm/mach-exynos/include/mach/regs-pmu.h @@ -367,4 +367,7 @@ #define EXYNOS5_OPTION_USE_RETENTION (1 << 4) +/* Only for EXYNOS5250 */ +#define EXYNOS5_SATA_PHY_CONTROL S5P_PMUREG(0x0724) + #endif /* __ASM_ARCH_REGS_PMU_H */ diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index bf3fd91..33fb2f6 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile @@ -9,7 +9,7 @@ obj-$(CONFIG_SATA_FSL) += sata_fsl.o obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o obj-$(CONFIG_SATA_SIL24) += sata_sil24.o obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o -obj-$(CONFIG_SATA_EXYNOS) += sata_phy.o libahci.o +obj-$(CONFIG_SATA_EXYNOS) += sata_phy.o sata_exynos.o libahci.o # SFF w/ custom DMA obj-$(CONFIG_PDC_ADMA) += pdc_adma.o diff --git a/drivers/ata/sata_exynos.c b/drivers/ata/sata_exynos.c new file mode 100644 index 0000000..877039e --- /dev/null +++ b/drivers/ata/sata_exynos.c @@ -0,0 +1,274 @@ +/* + * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * EXYNOS - SATA controller driver + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ahci.h" +#include "sata_phy.h" + +#define SATA_FREQ (66*1000*1000) + +static const struct ata_port_info ahci_port_info[] = { + [0] = { + .flags = AHCI_FLAG_COMMON, + .pio_mask = ATA_PIO4, + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_ops, + }, +}; + +static struct scsi_host_template ahci_platform_sht = { + AHCI_SHT("ahci_platform"), +}; + +struct exynos_sata { + struct clk *sclk; + struct clk *clk; + struct sata_phy *phy; + int irq; +}; + +static int __init exynos_sata_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ata_port_info pi = ahci_port_info[0]; + const struct ata_port_info *ppi[] = { &pi, NULL }; + struct ahci_host_priv *hpriv; + struct exynos_sata *sata; + struct ata_host *host; + struct resource *mem; + int n_ports, i, ret; + + sata = kzalloc(sizeof(*sata), GFP_KERNEL); + if (!sata) { + dev_err(dev, "can't alloc sata\n"); + ret = -ENOMEM; + return ret; + } + + hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL); + if (!hpriv) { + dev_err(dev, "can't alloc ahci_host_priv\n"); + ret = -ENOMEM; + goto err1; + } + + hpriv->flags |= (unsigned long)pi.private_data; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + dev_err(dev, "no mmio space\n"); + ret = -EINVAL; + goto err2; + } + + sata->irq = platform_get_irq(pdev, 0); + if (sata->irq <= 0) { + dev_err(dev, "no irq\n"); + ret = -EINVAL; + goto err2; + } + + hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem)); + if (!hpriv->mmio) { + dev_err(dev, "can't map %pR\n", mem); + ret = -ENOMEM; + goto err2; + } + + sata->sclk = clk_get(dev, "sclk_sata"); + if (IS_ERR(sata->sclk)) { + dev_err(dev, "failed to get sclk_sata\n"); + ret = PTR_ERR(sata->sclk); + goto err3; + } + clk_enable(sata->sclk); + + clk_set_rate(sata->sclk, SATA_FREQ); + + sata->clk = clk_get(dev, "sata"); + if (IS_ERR(sata->clk)) { + dev_err(dev, "failed to get sata clock\n"); + ret = PTR_ERR(sata->clk); + goto err4; + } + clk_enable(sata->clk); + + /* Get a gen 3 PHY controller */ + + sata->phy = sata_get_phy(SATA_PHY_GENERATION3); + if (IS_ERR(sata->phy)) { + dev_err(dev, "failed to get sata phy\n"); + ret = PTR_ERR(sata->clk); + goto err5; + } + + /* Initialize the controller */ + + ret = sata_init_phy(sata->phy); + if (ret) + goto err6; + + ahci_save_initial_config(dev, hpriv, 0, 0); + + /* prepare host */ + if (hpriv->cap & HOST_CAP_NCQ) + pi.flags |= ATA_FLAG_NCQ; + + if (hpriv->cap & HOST_CAP_PMP) + pi.flags |= ATA_FLAG_PMP; + + ahci_set_em_messages(hpriv, &pi); + + /* CAP.NP sometimes indicate the index of the last enabled + * port, at other times, that of the last possible port, so + * determining the maximum port number requires looking at + * both CAP.NP and port_map. + */ + n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); + + host = ata_host_alloc_pinfo(dev, ppi, n_ports); + if (!host) { + ret = -ENOMEM; + goto err7; + } + + host->private_data = hpriv; + + if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) + host->flags |= ATA_HOST_PARALLEL_SCAN; + else + pr_info(KERN_INFO + "ahci: SSS flag set, parallel bus scan disabled\n"); + + if (pi.flags & ATA_FLAG_EM) + ahci_reset_em(host); + + for (i = 0; i < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + + ata_port_desc(ap, "mmio %pR", mem); + ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); + + /* set enclosure management message type */ + if (ap->flags & ATA_FLAG_EM) + ap->em_message_type = hpriv->em_msg_type; + + /* disabled/not-implemented port */ + if (!(hpriv->port_map & (1 << i))) + ap->ops = &ata_dummy_port_ops; + } + + ret = ahci_reset_controller(host); + if (ret) + goto err7; + + ahci_init_controller(host); + ahci_print_info(host, "platform"); + + ret = ata_host_activate(host, sata->irq, ahci_interrupt, IRQF_SHARED, + &ahci_platform_sht); + if (ret) + goto err7; + + platform_set_drvdata(pdev, sata); + + return 0; + + err7: + sata_shutdown_phy(sata->phy); + + err6: + sata_put_phy(sata->phy); + + err5: + clk_disable(sata->clk); + clk_put(sata->clk); + + err4: + clk_disable(sata->sclk); + clk_put(sata->sclk); + + err3: + iounmap(hpriv->mmio); + + err2: + kfree(hpriv); + + err1: + kfree(sata); + + return ret; +} + +static int __devexit exynos_sata_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ata_host *host = dev_get_drvdata(dev); + struct exynos_sata *sata = platform_get_drvdata(pdev); + ata_host_detach(host); + + sata_shutdown_phy(sata->phy); + sata_put_phy(sata->phy); + + clk_disable(sata->sclk); + clk_put(sata->sclk); + + clk_disable(sata->clk); + clk_put(sata->clk); + + kfree(sata); + + return 0; +} + +static const struct of_device_id ahci_of_match[] = { + {.compatible = "samsung,exynos-sata-ahci",}, +}; + +MODULE_DEVICE_TABLE(of, ahci_of_match); + +static struct platform_driver exynos_sata_driver = { + .remove = exynos_sata_remove, + .driver = { + .name = "ahci-sata", + .owner = THIS_MODULE, + .of_match_table = ahci_of_match, + }, +}; + +static int __init exynos_sata_init(void) +{ + return platform_driver_probe(&exynos_sata_driver, exynos_sata_probe); +} + +module_init(exynos_sata_init); + +static void __exit exynos_sata_exit(void) +{ + platform_driver_unregister(&exynos_sata_driver); +} + +module_exit(exynos_sata_exit); + +MODULE_DESCRIPTION("EXYNOS SATA DRIVER"); +MODULE_AUTHOR("Vasanth Ananthan, "); +MODULE_LICENSE("GPL");