219 строки
5.3 KiB
C
219 строки
5.3 KiB
C
/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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* Copyright (C) 2012 Marek Vasut <marex@denx.de>
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* on behalf of DENX Software Engineering GmbH
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/dma-mapping.h>
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#include <linux/usb/chipidea.h>
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#include <linux/clk.h>
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#include "ci.h"
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#include "ci_hdrc_imx.h"
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#define CI_HDRC_IMX_IMX28_WRITE_FIX BIT(0)
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struct ci_hdrc_imx_platform_flag {
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unsigned int flags;
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};
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static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
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};
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static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
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.flags = CI_HDRC_IMX_IMX28_WRITE_FIX,
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};
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static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
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{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
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{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
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struct ci_hdrc_imx_data {
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struct usb_phy *phy;
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struct platform_device *ci_pdev;
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struct clk *clk;
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struct imx_usbmisc_data *usbmisc_data;
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};
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/* Common functions shared by usbmisc drivers */
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static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
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{
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struct device_node *np = dev->of_node;
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struct of_phandle_args args;
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struct imx_usbmisc_data *data;
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int ret;
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/*
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* In case the fsl,usbmisc property is not present this device doesn't
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* need usbmisc. Return NULL (which is no error here)
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*/
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if (!of_get_property(np, "fsl,usbmisc", NULL))
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return NULL;
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data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return ERR_PTR(-ENOMEM);
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ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
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0, &args);
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if (ret) {
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dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
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ret);
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return ERR_PTR(ret);
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}
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data->index = args.args[0];
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of_node_put(args.np);
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if (of_find_property(np, "disable-over-current", NULL))
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data->disable_oc = 1;
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if (of_find_property(np, "external-vbus-divider", NULL))
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data->evdo = 1;
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return data;
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}
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/* End of common functions shared by usbmisc drivers*/
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static int ci_hdrc_imx_probe(struct platform_device *pdev)
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{
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struct ci_hdrc_imx_data *data;
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struct ci_hdrc_platform_data pdata = {
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.name = dev_name(&pdev->dev),
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.capoffset = DEF_CAPOFFSET,
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.flags = CI_HDRC_REQUIRE_TRANSCEIVER |
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CI_HDRC_DISABLE_STREAMING,
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};
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int ret;
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const struct of_device_id *of_id =
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of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
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const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data) {
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dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
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return -ENOMEM;
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}
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data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
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if (IS_ERR(data->usbmisc_data))
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return PTR_ERR(data->usbmisc_data);
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data->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(data->clk)) {
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dev_err(&pdev->dev,
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"Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
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return PTR_ERR(data->clk);
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}
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ret = clk_prepare_enable(data->clk);
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if (ret) {
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dev_err(&pdev->dev,
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"Failed to prepare or enable clock, err=%d\n", ret);
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return ret;
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}
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data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
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if (IS_ERR(data->phy)) {
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ret = PTR_ERR(data->phy);
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goto err_clk;
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}
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pdata.phy = data->phy;
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if (imx_platform_flag->flags & CI_HDRC_IMX_IMX28_WRITE_FIX)
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pdata.flags |= CI_HDRC_IMX28_WRITE_FIX;
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ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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if (ret)
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goto err_clk;
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if (data->usbmisc_data) {
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ret = imx_usbmisc_init(data->usbmisc_data);
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if (ret) {
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dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n",
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ret);
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goto err_clk;
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}
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}
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data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
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pdev->resource, pdev->num_resources,
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&pdata);
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if (IS_ERR(data->ci_pdev)) {
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ret = PTR_ERR(data->ci_pdev);
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dev_err(&pdev->dev,
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"Can't register ci_hdrc platform device, err=%d\n",
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ret);
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goto err_clk;
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}
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if (data->usbmisc_data) {
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ret = imx_usbmisc_init_post(data->usbmisc_data);
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if (ret) {
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dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n",
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ret);
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goto disable_device;
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}
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}
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platform_set_drvdata(pdev, data);
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pm_runtime_no_callbacks(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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return 0;
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disable_device:
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ci_hdrc_remove_device(data->ci_pdev);
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err_clk:
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clk_disable_unprepare(data->clk);
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return ret;
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}
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static int ci_hdrc_imx_remove(struct platform_device *pdev)
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{
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struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
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pm_runtime_disable(&pdev->dev);
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ci_hdrc_remove_device(data->ci_pdev);
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clk_disable_unprepare(data->clk);
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return 0;
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}
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static struct platform_driver ci_hdrc_imx_driver = {
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.probe = ci_hdrc_imx_probe,
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.remove = ci_hdrc_imx_remove,
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.driver = {
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.name = "imx_usb",
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.owner = THIS_MODULE,
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.of_match_table = ci_hdrc_imx_dt_ids,
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},
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};
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module_platform_driver(ci_hdrc_imx_driver);
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MODULE_ALIAS("platform:imx-usb");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
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MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
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MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
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