lkml.org 
[lkml]   [2013]   [Sep]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC PATCH 09/15] ata: ti_sata: Add Texas Instruments SATA Wrapper driver
    Date
    Texas Instruments SoCs like OMAP5 and DRA7 contain a SATA wrapper
    around the AHCI SATA core. This driver will manage that.

    CC: Tejun Heo <tj@kernel.org>
    Signed-off-by: Roger Quadros <rogerq@ti.com>
    ---
    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 = <GIC_SPI 54 IRQ_TYPE_LEVEL_HIGH>;
    + 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 <rogerq@ti.com>
    + *
    + * 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 <linux/module.h>
    +#include <linux/kernel.h>
    +#include <linux/slab.h>
    +#include <linux/platform_device.h>
    +#include <linux/ioport.h>
    +#include <linux/io.h>
    +#include <linux/pm_runtime.h>
    +#include <linux/of.h>
    +#include <linux/of_platform.h>
    +
    +/*
    + * 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 <rogerq@ti.com>");
    +MODULE_LICENSE("GPL v2");
    +MODULE_DESCRIPTION("TI SATA Glue Layer");
    --
    1.7.4.1


    \
     
     \ /
      Last update: 2013-09-19 15:21    [W:4.217 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site