[PATCH v8 14/14] usb: chipidea: add imx platform driver
Richard Zhao
richard.zhao at freescale.com
Fri Jun 29 05:03:39 EDT 2012
On Thu, Jun 28, 2012 at 11:37:31AM +0800, Richard Zhao wrote:
> This patch supports only the host-mode functionality so far.
>
> Signed-off-by: Richard Zhao <richard.zhao at freescale.com>
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Peter Chen <peter.chen at freescale.com>
> Cc: Alexander Shishkin <alexander.shishkin at linux.intel.com>
> Cc: Felipe Balbi <balbi at ti.com>
> Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> Tested-by: Subodh Nijsure <snijsure at grid-net.com>
> ---
> .../devicetree/bindings/usb/ci13xxx-imx.txt | 17 ++
> drivers/usb/chipidea/Makefile | 3 +
> drivers/usb/chipidea/ci13xxx_imx.c | 197 ++++++++++++++++++++
> 3 files changed, 217 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
> create mode 100644 drivers/usb/chipidea/ci13xxx_imx.c
>
> diff --git a/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
> new file mode 100644
> index 0000000..5a0ad66
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
> @@ -0,0 +1,17 @@
> +* Freescale i.MX ci13xxx usb controllers
> +
> +Required properties:
> +- compatible: Should be "fsl,imx27-usb"
> +- reg: Should contain registers location and length
> +- interrupts: Should contain controller interrupt
> +
> +Optional properties:
> +- fsl,usbphy: phandler of usb phy that connects to the only one port
> +
> +Examples:
> +usb at 02184000 { /* USB OTG */
> + compatible = "fsl,imx6q-usb", "fsl,imx27-usb";
> + reg = <0x02184000 0x200>;
> + interrupts = <0 43 0x04>;
> + fsl,usbphy = <&usbphy1>;
> +};
> diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
> index b69900a..5c66d9c 100644
> --- a/drivers/usb/chipidea/Makefile
> +++ b/drivers/usb/chipidea/Makefile
> @@ -14,3 +14,6 @@ ifneq ($(CONFIG_PCI),)
> obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_pci.o
> endif
>
> +ifneq ($(CONFIG_OF_DEVICE),)
> + obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_imx.o
> +endif
> diff --git a/drivers/usb/chipidea/ci13xxx_imx.c b/drivers/usb/chipidea/ci13xxx_imx.c
> new file mode 100644
> index 0000000..efae2be
> --- /dev/null
> +++ b/drivers/usb/chipidea/ci13xxx_imx.c
> @@ -0,0 +1,197 @@
> +/*
> + * Copyright 2012 Freescale Semiconductor, Inc.
> + * Copyright (C) 2012 Marek Vasut <marex at denx.de>
> + * on behalf of DENX Software Engineering GmbH
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +#include <linux/module.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_gpio.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/usb/chipidea.h>
> +#include <linux/clk.h>
> +#include <linux/regulator/consumer.h>
> +
> +#include "ci.h"
> +
> +#define pdev_to_phy(pdev) \
> + ((struct usb_phy *)platform_get_drvdata(pdev))
> +
> +struct ci13xxx_imx_data {
> + struct device_node *phy_np;
> + struct usb_phy *phy;
> + struct platform_device *ci_pdev;
> + struct clk *clk;
> + struct regulator *reg_vbus;
> +};
> +
> +static struct ci13xxx_platform_data ci13xxx_imx_platdata __devinitdata = {
> + .name = "ci13xxx_imx",
> + .flags = CI13XXX_REQUIRE_TRANSCEIVER |
> + CI13XXX_PULLUP_ON_VBUS |
> + CI13XXX_DISABLE_STREAMING,
> + .capoffset = DEF_CAPOFFSET,
> +};
> +
> +static int __devinit ci13xxx_imx_probe(struct platform_device *pdev)
> +{
> + struct ci13xxx_imx_data *data;
> + struct platform_device *plat_ci, *phy_pdev;
> + struct device_node *phy_np;
> + struct resource *res;
> + struct regulator *reg_vbus;
> + int ret;
> +
> + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
> + if (!data) {
> + dev_err(&pdev->dev, "Failed to allocate CI13xxx-IMX data!\n");
> + return -ENOMEM;
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + dev_err(&pdev->dev, "Can't get device resources!\n");
> + return -ENOENT;
> + }
> +
> + data->clk = devm_clk_get(&pdev->dev, NULL);
> + if (IS_ERR(data->clk)) {
> + dev_err(&pdev->dev,
> + "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
> + return PTR_ERR(data->clk);
> + }
> +
> + ret = clk_prepare_enable(data->clk);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "Failed to prepare or enable clock, err=%d\n", ret);
> + return ret;
> + }
> +
> + phy_np = of_parse_phandle(pdev->dev.of_node, "fsl,usbphy", 0);
> + if (phy_np) {
> + data->phy_np = phy_np;
> + phy_pdev = of_find_device_by_node(phy_np);
> + if (phy_pdev) {
> + struct usb_phy *phy;
> + phy = pdev_to_phy(phy_pdev);
> + if (phy &&
> + try_module_get(phy_pdev->dev.driver->owner)) {
> + usb_phy_init(phy);
> + data->phy = phy;
> + }
> + }
> + }
> +
> + /* we only support host now, so enable vbus here */
> + reg_vbus = devm_regulator_get(&pdev->dev, "vbus");
> + if (!IS_ERR(reg_vbus)) {
> + ret = regulator_enable(reg_vbus);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "Failed to enable vbus regulator, err=%d\n",
> + ret);
> + goto put_np;
> + }
> + data->reg_vbus = reg_vbus;
> + } else {
> + reg_vbus = NULL;
> + }
> +
> + ci13xxx_imx_platdata.phy = data->phy;
> +
> + if (!pdev->dev.dma_mask) {
> + pdev->dev.dma_mask = devm_kzalloc(&pdev->dev,
> + sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
> + if (!pdev->dev.dma_mask) {
> + ret = -ENOMEM;
> + dev_err(&pdev->dev, "Failed to alloc dma_mask!\n");
> + goto err;
> + }
> + *pdev->dev.dma_mask = DMA_BIT_MASK(32);
> + dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask);
> + }
> + plat_ci = ci13xxx_add_device(&pdev->dev,
> + pdev->resource, pdev->num_resources,
> + &ci13xxx_imx_platdata);
> + if (IS_ERR(plat_ci)) {
> + ret = PTR_ERR(plat_ci);
> + dev_err(&pdev->dev,
> + "Can't register ci_hdrc platform device, err=%d\n",
> + ret);
> + goto err;
> + }
> +
> + data->ci_pdev = plat_ci;
> + platform_set_drvdata(pdev, data);
> +
> + pm_runtime_no_callbacks(&pdev->dev);
> + pm_runtime_enable(&pdev->dev);
> +
> + return 0;
> +
> +err:
> + if (reg_vbus)
> + regulator_disable(reg_vbus);
> +put_np:
> + if (phy_np)
> + of_node_put(phy_np);
> + clk_disable_unprepare(data->clk);
> + return ret;
> +}
> +
> +static int __devexit ci13xxx_imx_remove(struct platform_device *pdev)
> +{
> + struct ci13xxx_imx_data *data = platform_get_drvdata(pdev);
> +
> + ci13xxx_remove_device(data->ci_pdev);
It lacks pm_runtime_disable.
> +
> + if (data->reg_vbus)
> + regulator_disable(data->reg_vbus);
> +
> + if (data->phy) {
> + usb_phy_shutdown(data->phy);
> + module_put(data->phy->dev->driver->owner);
> + }
> +
> + of_node_put(data->phy_np);
> +
> + clk_disable_unprepare(data->clk);
> +
> + platform_set_drvdata(pdev, NULL);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id ci13xxx_imx_dt_ids[] = {
> + { .compatible = "fsl,imx27-usb", },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, ci13xxx_imx_dt_ids);
> +
> +static struct platform_driver ci13xxx_imx_driver = {
> + .probe = ci13xxx_imx_probe,
> + .remove = __devexit_p(ci13xxx_imx_remove),
> + .driver = {
> + .name = "imx_usb",
> + .owner = THIS_MODULE,
> + .of_match_table = ci13xxx_imx_dt_ids,
> + },
> +};
> +
> +module_platform_driver(ci13xxx_imx_driver);
> +
> +MODULE_ALIAS("platform:imx-usb");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("CI13xxx i.MX USB binding");
> +MODULE_AUTHOR("Marek Vasut <marex at denx.de>");
> +MODULE_AUTHOR("Richard Zhao <richard.zhao at freescale.com>");
> --
> 1.7.9.5
>
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