/* * Copyright 2012 Freescale Semiconductor, Inc. * Copyright (C) 2012 Marek Vasut * 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 #include #include #include #include #include #include #include #include "ci.h" #include "ci_hdrc_imx.h" struct ci_hdrc_imx_data { struct usb_phy *phy; struct platform_device *ci_pdev; struct clk *clk; }; static const struct usbmisc_ops *usbmisc_ops; /* Common functions shared by usbmisc drivers */ int usbmisc_set_ops(const struct usbmisc_ops *ops) { if (usbmisc_ops) return -EBUSY; usbmisc_ops = ops; return 0; } EXPORT_SYMBOL_GPL(usbmisc_set_ops); void usbmisc_unset_ops(const struct usbmisc_ops *ops) { usbmisc_ops = NULL; } EXPORT_SYMBOL_GPL(usbmisc_unset_ops); int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev) { struct device_node *np = dev->of_node; struct of_phandle_args args; int ret; usbdev->dev = dev; ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", 0, &args); if (ret) { dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", ret); memset(usbdev, 0, sizeof(*usbdev)); return ret; } usbdev->index = args.args[0]; of_node_put(args.np); if (of_find_property(np, "disable-over-current", NULL)) usbdev->disable_oc = 1; if (of_find_property(np, "external-vbus-divider", NULL)) usbdev->evdo = 1; return 0; } EXPORT_SYMBOL_GPL(usbmisc_get_init_data); /* End of common functions shared by usbmisc drivers*/ static int ci_hdrc_imx_probe(struct platform_device *pdev) { struct ci_hdrc_imx_data *data; struct ci_hdrc_platform_data pdata = { .name = "ci_hdrc_imx", .capoffset = DEF_CAPOFFSET, .flags = CI_HDRC_REQUIRE_TRANSCEIVER | CI_HDRC_DISABLE_STREAMING, }; int ret; if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL) && !usbmisc_ops) return -EPROBE_DEFER; data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) { dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n"); return -ENOMEM; } 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; } data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0); if (!IS_ERR(data->phy)) { ret = usb_phy_init(data->phy); if (ret) { dev_err(&pdev->dev, "unable to init phy: %d\n", ret); goto err_clk; } } else if (PTR_ERR(data->phy) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; goto err_clk; } pdata.phy = data->phy; if (!pdev->dev.dma_mask) pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; if (!pdev->dev.coherent_dma_mask) pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); if (usbmisc_ops && usbmisc_ops->init) { ret = usbmisc_ops->init(&pdev->dev); if (ret) { dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret); goto err_clk; } } data->ci_pdev = ci_hdrc_add_device(&pdev->dev, pdev->resource, pdev->num_resources, &pdata); if (IS_ERR(data->ci_pdev)) { ret = PTR_ERR(data->ci_pdev); dev_err(&pdev->dev, "Can't register ci_hdrc platform device, err=%d\n", ret); goto err_clk; } if (usbmisc_ops && usbmisc_ops->post) { ret = usbmisc_ops->post(&pdev->dev); if (ret) { dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret); goto disable_device; } } platform_set_drvdata(pdev, data); pm_runtime_no_callbacks(&pdev->dev); pm_runtime_enable(&pdev->dev); return 0; disable_device: ci_hdrc_remove_device(data->ci_pdev); err_clk: clk_disable_unprepare(data->clk); return ret; } static int ci_hdrc_imx_remove(struct platform_device *pdev) { struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev); pm_runtime_disable(&pdev->dev); ci_hdrc_remove_device(data->ci_pdev); if (data->phy) usb_phy_shutdown(data->phy); clk_disable_unprepare(data->clk); return 0; } static const struct of_device_id ci_hdrc_imx_dt_ids[] = { { .compatible = "fsl,imx27-usb", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids); static struct platform_driver ci_hdrc_imx_driver = { .probe = ci_hdrc_imx_probe, .remove = ci_hdrc_imx_remove, .driver = { .name = "imx_usb", .owner = THIS_MODULE, .of_match_table = ci_hdrc_imx_dt_ids, }, }; module_platform_driver(ci_hdrc_imx_driver); MODULE_ALIAS("platform:imx-usb"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("CI HDRC i.MX USB binding"); MODULE_AUTHOR("Marek Vasut "); MODULE_AUTHOR("Richard Zhao ");