/* * Copyright (C) 2010 ST-Ericsson AB * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> * * Based on omap2430.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/platform_device.h> #include "musb_core.h" struct ux500_glue { struct device *dev; struct platform_device *musb; struct clk *clk; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) static int ux500_musb_init(struct musb *musb) { musb->xceiv = otg_get_transceiver(); if (!musb->xceiv) { pr_err("HS USB OTG: no transceiver configured\n"); return -ENODEV; } return 0; } static int ux500_musb_exit(struct musb *musb) { otg_put_transceiver(musb->xceiv); return 0; } static const struct musb_platform_ops ux500_ops = { .init = ux500_musb_init, .exit = ux500_musb_exit, }; static int __init ux500_probe(struct platform_device *pdev) { struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; struct platform_device *musb; struct ux500_glue *glue; struct clk *clk; int ret = -ENOMEM; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { dev_err(&pdev->dev, "failed to allocate glue context\n"); goto err0; } musb = platform_device_alloc("musb-hdrc", -1); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); goto err1; } clk = clk_get(&pdev->dev, "usb"); if (IS_ERR(clk)) { dev_err(&pdev->dev, "failed to get clock\n"); ret = PTR_ERR(clk); goto err2; } ret = clk_enable(clk); if (ret) { dev_err(&pdev->dev, "failed to enable clock\n"); goto err3; } musb->dev.parent = &pdev->dev; glue->dev = &pdev->dev; glue->musb = musb; glue->clk = clk; pdata->platform_ops = &ux500_ops; platform_set_drvdata(pdev, glue); ret = platform_device_add_resources(musb, pdev->resource, pdev->num_resources); if (ret) { dev_err(&pdev->dev, "failed to add resources\n"); goto err4; } ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); if (ret) { dev_err(&pdev->dev, "failed to add platform_data\n"); goto err4; } ret = platform_device_add(musb); if (ret) { dev_err(&pdev->dev, "failed to register musb device\n"); goto err4; } return 0; err4: clk_disable(clk); err3: clk_put(clk); err2: platform_device_put(musb); err1: kfree(glue); err0: return ret; } static int __exit ux500_remove(struct platform_device *pdev) { struct ux500_glue *glue = platform_get_drvdata(pdev); platform_device_del(glue->musb); platform_device_put(glue->musb); clk_disable(glue->clk); clk_put(glue->clk); kfree(glue); return 0; } #ifdef CONFIG_PM static int ux500_suspend(struct device *dev) { struct ux500_glue *glue = dev_get_drvdata(dev); struct musb *musb = glue_to_musb(glue); otg_set_suspend(musb->xceiv, 1); clk_disable(glue->clk); return 0; } static int ux500_resume(struct device *dev) { struct ux500_glue *glue = dev_get_drvdata(dev); struct musb *musb = glue_to_musb(glue); int ret; ret = clk_enable(glue->clk); if (ret) { dev_err(dev, "failed to enable clock\n"); return ret; } otg_set_suspend(musb->xceiv, 0); return 0; } static const struct dev_pm_ops ux500_pm_ops = { .suspend = ux500_suspend, .resume = ux500_resume, }; #define DEV_PM_OPS (&ux500_pm_ops) #else #define DEV_PM_OPS NULL #endif static struct platform_driver ux500_driver = { .remove = __exit_p(ux500_remove), .driver = { .name = "musb-ux500", .pm = DEV_PM_OPS, }, }; MODULE_DESCRIPTION("UX500 MUSB Glue Layer"); MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>"); MODULE_LICENSE("GPL v2"); static int __init ux500_init(void) { return platform_driver_probe(&ux500_driver, ux500_probe); } subsys_initcall(ux500_init); static void __exit ux500_exit(void) { platform_driver_unregister(&ux500_driver); } module_exit(ux500_exit);