| /* |
| * 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 __devinit 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; |
| musb->dev.dma_mask = pdev->dev.dma_mask; |
| musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask; |
| |
| 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 __devexit 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 = { |
| .probe = ux500_probe, |
| .remove = __devexit_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_register(&ux500_driver); |
| } |
| module_init(ux500_init); |
| |
| static void __exit ux500_exit(void) |
| { |
| platform_driver_unregister(&ux500_driver); |
| } |
| module_exit(ux500_exit); |