Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754173Ab3ISNGp (ORCPT ); Thu, 19 Sep 2013 09:06:45 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:41225 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753813Ab3ISNGm (ORCPT ); Thu, 19 Sep 2013 09:06:42 -0400 From: Roger Quadros To: , , CC: , , , , , , , Roger Quadros , Tejun Heo Subject: [RFC PATCH 09/15] ata: ti_sata: Add Texas Instruments SATA Wrapper driver Date: Thu, 19 Sep 2013 16:05:37 +0300 Message-ID: <1379595943-14622-10-git-send-email-rogerq@ti.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1379595943-14622-1-git-send-email-rogerq@ti.com> References: <1379595943-14622-1-git-send-email-rogerq@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6649 Lines: 255 Texas Instruments SoCs like OMAP5 and DRA7 contain a SATA wrapper around the AHCI SATA core. This driver will manage that. CC: Tejun Heo Signed-off-by: Roger Quadros --- Documentation/devicetree/bindings/ata/ti-sata.txt | 31 ++++ drivers/ata/Kconfig | 7 + drivers/ata/Makefile | 1 + drivers/ata/sata_ti.c | 160 +++++++++++++++++++++ 4 files changed, 199 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/ata/ti-sata.txt create mode 100644 drivers/ata/sata_ti.c diff --git a/Documentation/devicetree/bindings/ata/ti-sata.txt b/Documentation/devicetree/bindings/ata/ti-sata.txt new file mode 100644 index 0000000..bf0ea3b --- /dev/null +++ b/Documentation/devicetree/bindings/ata/ti-sata.txt @@ -0,0 +1,31 @@ +* Texas Instruments SATA Controller Wrapper + +Required properties: +- compatible : "ti,sata" +- ti,hwmods : "sata" +- reg : Register mapping +- #address-cells: <1> +- #size-cells : <1> +- ranges : allows valid translation between child's address space and parent's + address space. +- Must contain at least one child node for the SATA controller core + +Example: + + sata: sata@4a141100 { + compatible = "ti,sata"; + ti,hwmods = "sata"; + reg = <0x4a141100 0x7>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + dwc-ahci@4a140000 { + compatible = "snps,dwc-ahci"; + reg = <0x4a140000 0x1100>; + interrupts = ; + phys = <&sata_phy>; + phy-names = "sata-phy"; + clocks = <&sata_ref_clk>; + clock-names = "optclk"; + }; + }; diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index a53ef27..a3de4d2 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -138,6 +138,13 @@ config SATA_SIL24 If unsure, say N. +config SATA_TI + tristate "Texas Instruments SATA Wrapper driver" + depends on ARCH_OMAP + help + This options enables SATA Wrapper driver for Texas Instruments SoCs. + It is found on OMAP5 and DRA7. + config ATA_SFF bool "ATA SFF support (for legacy IDE and PATA)" default y diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index 46518c6..673ba5e 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile @@ -11,6 +11,7 @@ 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_IMX) += ahci_imx.o +obj-$(CONFIG_SATA_TI) += sata_ti.o # SFF w/ custom DMA obj-$(CONFIG_PDC_ADMA) += pdc_adma.o diff --git a/drivers/ata/sata_ti.c b/drivers/ata/sata_ti.c new file mode 100644 index 0000000..0b9093d --- /dev/null +++ b/drivers/ata/sata_ti.c @@ -0,0 +1,160 @@ +/** + * sata-ti.c - Texas Instruments Specific SATA Glue layer + * + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Roger Quadros + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 of + * the License as published by the Free Software Foundation. + * + * 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 + +/* + * All these registers belong to OMAP's Wrapper around the + * DesignWare SATA Core. + */ + +#define SATA_SYSCONFIG 0x0000 +#define SATA_CDRLOCK 0x0004 + +struct ti_sata { + struct device *dev; + void __iomem *base; +}; + +static int ti_sata_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct ti_sata *sata; + struct resource *res; + void __iomem *base; + int ret; + + if (!np) { + dev_err(dev, "device node not found\n"); + return -EINVAL; + } + + sata = devm_kzalloc(dev, sizeof(*sata), GFP_KERNEL); + if (!sata) + return -ENOMEM; + + platform_set_drvdata(pdev, sata); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "missing memory base resource\n"); + return -EINVAL; + } + + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + sata->dev = dev; + sata->base = base; + + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + dev_err(dev, "pm_runtime_get_sync failed with err %d\n", + ret); + goto runtime_disable; + } + + ret = of_platform_populate(np, NULL, NULL, dev); + if (ret) { + dev_err(&pdev->dev, "failed to create TI SATA children\n"); + goto runtime_put; + } + + return 0; + +runtime_put: + pm_runtime_put_sync(dev); + +runtime_disable: + pm_runtime_disable(dev); + + return ret; +} + +static int ti_sata_remove_child(struct device *dev, void *c) +{ + struct platform_device *pdev = to_platform_device(dev); + + platform_device_unregister(pdev); + + return 0; +} + +static int ti_sata_remove(struct platform_device *pdev) +{ + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + device_for_each_child(&pdev->dev, NULL, ti_sata_remove_child); + + return 0; +} + +static const struct of_device_id of_ti_sata_match[] = { + { + .compatible = "ti,sata" + }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_ti_sata_match); + +#ifdef CONFIG_PM + +static int ti_sata_resume(struct device *dev) +{ + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + return 0; +} + +static const struct dev_pm_ops ti_sata_dev_pm_ops = { + .resume = ti_sata_resume, +}; + +#define DEV_PM_OPS (&ti_sata_dev_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM */ + +static struct platform_driver ti_sata_driver = { + .probe = ti_sata_probe, + .remove = ti_sata_remove, + .driver = { + .name = "ti-sata", + .of_match_table = of_ti_sata_match, + .pm = DEV_PM_OPS, + }, +}; + +module_platform_driver(ti_sata_driver); + +MODULE_ALIAS("platform:ti-sata"); +MODULE_AUTHOR("Roger Quadros "); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TI SATA Glue Layer"); -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/