/* * 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 #include #include "ci.h" #include "ci13xxx_imx.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 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 struct ci13xxx_platform_data ci13xxx_imx_platdata = { .name = "ci13xxx_imx", .flags = CI13XXX_REQUIRE_TRANSCEIVER | CI13XXX_PULLUP_ON_VBUS | CI13XXX_DISABLE_STREAMING, .capoffset = DEF_CAPOFFSET, }; static int 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; struct pinctrl *pinctrl; 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 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; } pinctrl = devm_pinctrl_get_select_default(&pdev->dev); if (IS_ERR(pinctrl)) dev_warn(&pdev->dev, "pinctrl get/select failed, err=%ld\n", PTR_ERR(pinctrl)); 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 = &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; } } 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; } 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 put_np; } } 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 ci13xxx_imx_remove(struct platform_device *pdev) { struct ci13xxx_imx_data *data = platform_get_drvdata(pdev); pm_runtime_disable(&pdev->dev); ci13xxx_remove_device(data->ci_pdev); 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); 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 = 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 "); MODULE_AUTHOR("Richard Zhao ");