14bc36fd3SMian Yousaf Kaukab /* 24bc36fd3SMian Yousaf Kaukab * Copyright (C) 2010 ST-Ericsson AB 34bc36fd3SMian Yousaf Kaukab * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> 44bc36fd3SMian Yousaf Kaukab * 54bc36fd3SMian Yousaf Kaukab * Based on omap2430.c 64bc36fd3SMian Yousaf Kaukab * 74bc36fd3SMian Yousaf Kaukab * This program is free software; you can redistribute it and/or modify 84bc36fd3SMian Yousaf Kaukab * it under the terms of the GNU General Public License as published by 94bc36fd3SMian Yousaf Kaukab * the Free Software Foundation; either version 2 of the License, or 104bc36fd3SMian Yousaf Kaukab * (at your option) any later version. 114bc36fd3SMian Yousaf Kaukab * 124bc36fd3SMian Yousaf Kaukab * This program is distributed in the hope that it will be useful, 134bc36fd3SMian Yousaf Kaukab * but WITHOUT ANY WARRANTY; without even the implied warranty of 144bc36fd3SMian Yousaf Kaukab * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 154bc36fd3SMian Yousaf Kaukab * GNU General Public License for more details. 164bc36fd3SMian Yousaf Kaukab * 174bc36fd3SMian Yousaf Kaukab * You should have received a copy of the GNU General Public License 184bc36fd3SMian Yousaf Kaukab * along with this program; if not, write to the Free Software 194bc36fd3SMian Yousaf Kaukab * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 204bc36fd3SMian Yousaf Kaukab */ 214bc36fd3SMian Yousaf Kaukab 224bc36fd3SMian Yousaf Kaukab #include <linux/module.h> 234bc36fd3SMian Yousaf Kaukab #include <linux/kernel.h> 244bc36fd3SMian Yousaf Kaukab #include <linux/init.h> 254bc36fd3SMian Yousaf Kaukab #include <linux/clk.h> 26ded017eeSKishon Vijay Abraham I #include <linux/err.h> 274bc36fd3SMian Yousaf Kaukab #include <linux/io.h> 284bc36fd3SMian Yousaf Kaukab #include <linux/platform_device.h> 294bc36fd3SMian Yousaf Kaukab 304bc36fd3SMian Yousaf Kaukab #include "musb_core.h" 314bc36fd3SMian Yousaf Kaukab 324bc36fd3SMian Yousaf Kaukab struct ux500_glue { 334bc36fd3SMian Yousaf Kaukab struct device *dev; 344bc36fd3SMian Yousaf Kaukab struct platform_device *musb; 354bc36fd3SMian Yousaf Kaukab struct clk *clk; 364bc36fd3SMian Yousaf Kaukab }; 374bc36fd3SMian Yousaf Kaukab #define glue_to_musb(g) platform_get_drvdata(g->musb) 384bc36fd3SMian Yousaf Kaukab 39baef653aSPhilippe De Swert static irqreturn_t ux500_musb_interrupt(int irq, void *__hci) 40baef653aSPhilippe De Swert { 41baef653aSPhilippe De Swert unsigned long flags; 42baef653aSPhilippe De Swert irqreturn_t retval = IRQ_NONE; 43baef653aSPhilippe De Swert struct musb *musb = __hci; 44baef653aSPhilippe De Swert 45baef653aSPhilippe De Swert spin_lock_irqsave(&musb->lock, flags); 46baef653aSPhilippe De Swert 47baef653aSPhilippe De Swert musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); 48baef653aSPhilippe De Swert musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); 49baef653aSPhilippe De Swert musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); 50baef653aSPhilippe De Swert 51baef653aSPhilippe De Swert if (musb->int_usb || musb->int_tx || musb->int_rx) 52baef653aSPhilippe De Swert retval = musb_interrupt(musb); 53baef653aSPhilippe De Swert 54baef653aSPhilippe De Swert spin_unlock_irqrestore(&musb->lock, flags); 55baef653aSPhilippe De Swert 56baef653aSPhilippe De Swert return retval; 57baef653aSPhilippe De Swert } 58baef653aSPhilippe De Swert 594bc36fd3SMian Yousaf Kaukab static int ux500_musb_init(struct musb *musb) 604bc36fd3SMian Yousaf Kaukab { 61662dca54SKishon Vijay Abraham I musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); 62ded017eeSKishon Vijay Abraham I if (IS_ERR_OR_NULL(musb->xceiv)) { 634bc36fd3SMian Yousaf Kaukab pr_err("HS USB OTG: no transceiver configured\n"); 644bc36fd3SMian Yousaf Kaukab return -ENODEV; 654bc36fd3SMian Yousaf Kaukab } 664bc36fd3SMian Yousaf Kaukab 67baef653aSPhilippe De Swert musb->isr = ux500_musb_interrupt; 68baef653aSPhilippe De Swert 694bc36fd3SMian Yousaf Kaukab return 0; 704bc36fd3SMian Yousaf Kaukab } 714bc36fd3SMian Yousaf Kaukab 724bc36fd3SMian Yousaf Kaukab static int ux500_musb_exit(struct musb *musb) 734bc36fd3SMian Yousaf Kaukab { 74721002ecSKishon Vijay Abraham I usb_put_phy(musb->xceiv); 754bc36fd3SMian Yousaf Kaukab 764bc36fd3SMian Yousaf Kaukab return 0; 774bc36fd3SMian Yousaf Kaukab } 784bc36fd3SMian Yousaf Kaukab 794bc36fd3SMian Yousaf Kaukab static const struct musb_platform_ops ux500_ops = { 804bc36fd3SMian Yousaf Kaukab .init = ux500_musb_init, 814bc36fd3SMian Yousaf Kaukab .exit = ux500_musb_exit, 824bc36fd3SMian Yousaf Kaukab }; 834bc36fd3SMian Yousaf Kaukab 84e9e8c85eSFelipe Balbi static int __devinit ux500_probe(struct platform_device *pdev) 854bc36fd3SMian Yousaf Kaukab { 864bc36fd3SMian Yousaf Kaukab struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; 874bc36fd3SMian Yousaf Kaukab struct platform_device *musb; 884bc36fd3SMian Yousaf Kaukab struct ux500_glue *glue; 894bc36fd3SMian Yousaf Kaukab struct clk *clk; 904bc36fd3SMian Yousaf Kaukab int ret = -ENOMEM; 914bc36fd3SMian Yousaf Kaukab 924bc36fd3SMian Yousaf Kaukab glue = kzalloc(sizeof(*glue), GFP_KERNEL); 934bc36fd3SMian Yousaf Kaukab if (!glue) { 944bc36fd3SMian Yousaf Kaukab dev_err(&pdev->dev, "failed to allocate glue context\n"); 954bc36fd3SMian Yousaf Kaukab goto err0; 964bc36fd3SMian Yousaf Kaukab } 974bc36fd3SMian Yousaf Kaukab 982f771164SSebastian Andrzej Siewior musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); 994bc36fd3SMian Yousaf Kaukab if (!musb) { 1004bc36fd3SMian Yousaf Kaukab dev_err(&pdev->dev, "failed to allocate musb device\n"); 1012f771164SSebastian Andrzej Siewior goto err1; 1024bc36fd3SMian Yousaf Kaukab } 1034bc36fd3SMian Yousaf Kaukab 1044bc36fd3SMian Yousaf Kaukab clk = clk_get(&pdev->dev, "usb"); 1054bc36fd3SMian Yousaf Kaukab if (IS_ERR(clk)) { 1064bc36fd3SMian Yousaf Kaukab dev_err(&pdev->dev, "failed to get clock\n"); 1074bc36fd3SMian Yousaf Kaukab ret = PTR_ERR(clk); 10865b3d52dSB, Ravi goto err3; 1094bc36fd3SMian Yousaf Kaukab } 1104bc36fd3SMian Yousaf Kaukab 1114bc36fd3SMian Yousaf Kaukab ret = clk_enable(clk); 1124bc36fd3SMian Yousaf Kaukab if (ret) { 1134bc36fd3SMian Yousaf Kaukab dev_err(&pdev->dev, "failed to enable clock\n"); 11465b3d52dSB, Ravi goto err4; 1154bc36fd3SMian Yousaf Kaukab } 1164bc36fd3SMian Yousaf Kaukab 1174bc36fd3SMian Yousaf Kaukab musb->dev.parent = &pdev->dev; 11887266064SMian Yousaf Kaukab musb->dev.dma_mask = pdev->dev.dma_mask; 11987266064SMian Yousaf Kaukab musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask; 1204bc36fd3SMian Yousaf Kaukab 1214bc36fd3SMian Yousaf Kaukab glue->dev = &pdev->dev; 1224bc36fd3SMian Yousaf Kaukab glue->musb = musb; 1234bc36fd3SMian Yousaf Kaukab glue->clk = clk; 1244bc36fd3SMian Yousaf Kaukab 1254bc36fd3SMian Yousaf Kaukab pdata->platform_ops = &ux500_ops; 1264bc36fd3SMian Yousaf Kaukab 1274bc36fd3SMian Yousaf Kaukab platform_set_drvdata(pdev, glue); 1284bc36fd3SMian Yousaf Kaukab 1294bc36fd3SMian Yousaf Kaukab ret = platform_device_add_resources(musb, pdev->resource, 1304bc36fd3SMian Yousaf Kaukab pdev->num_resources); 1314bc36fd3SMian Yousaf Kaukab if (ret) { 1324bc36fd3SMian Yousaf Kaukab dev_err(&pdev->dev, "failed to add resources\n"); 13365b3d52dSB, Ravi goto err5; 1344bc36fd3SMian Yousaf Kaukab } 1354bc36fd3SMian Yousaf Kaukab 1364bc36fd3SMian Yousaf Kaukab ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); 1374bc36fd3SMian Yousaf Kaukab if (ret) { 1384bc36fd3SMian Yousaf Kaukab dev_err(&pdev->dev, "failed to add platform_data\n"); 13965b3d52dSB, Ravi goto err5; 1404bc36fd3SMian Yousaf Kaukab } 1414bc36fd3SMian Yousaf Kaukab 1424bc36fd3SMian Yousaf Kaukab ret = platform_device_add(musb); 1434bc36fd3SMian Yousaf Kaukab if (ret) { 1444bc36fd3SMian Yousaf Kaukab dev_err(&pdev->dev, "failed to register musb device\n"); 14565b3d52dSB, Ravi goto err5; 1464bc36fd3SMian Yousaf Kaukab } 1474bc36fd3SMian Yousaf Kaukab 1484bc36fd3SMian Yousaf Kaukab return 0; 1494bc36fd3SMian Yousaf Kaukab 15065b3d52dSB, Ravi err5: 1514bc36fd3SMian Yousaf Kaukab clk_disable(clk); 1524bc36fd3SMian Yousaf Kaukab 15365b3d52dSB, Ravi err4: 1544bc36fd3SMian Yousaf Kaukab clk_put(clk); 1554bc36fd3SMian Yousaf Kaukab 15665b3d52dSB, Ravi err3: 1574bc36fd3SMian Yousaf Kaukab platform_device_put(musb); 1584bc36fd3SMian Yousaf Kaukab 1594bc36fd3SMian Yousaf Kaukab err1: 1604bc36fd3SMian Yousaf Kaukab kfree(glue); 1614bc36fd3SMian Yousaf Kaukab 1624bc36fd3SMian Yousaf Kaukab err0: 1634bc36fd3SMian Yousaf Kaukab return ret; 1644bc36fd3SMian Yousaf Kaukab } 1654bc36fd3SMian Yousaf Kaukab 166e9e8c85eSFelipe Balbi static int __devexit ux500_remove(struct platform_device *pdev) 1674bc36fd3SMian Yousaf Kaukab { 1684bc36fd3SMian Yousaf Kaukab struct ux500_glue *glue = platform_get_drvdata(pdev); 1694bc36fd3SMian Yousaf Kaukab 1704b0de6f3SWei Yongjun platform_device_unregister(glue->musb); 1714bc36fd3SMian Yousaf Kaukab clk_disable(glue->clk); 1724bc36fd3SMian Yousaf Kaukab clk_put(glue->clk); 1734bc36fd3SMian Yousaf Kaukab kfree(glue); 1744bc36fd3SMian Yousaf Kaukab 1754bc36fd3SMian Yousaf Kaukab return 0; 1764bc36fd3SMian Yousaf Kaukab } 1774bc36fd3SMian Yousaf Kaukab 1784bc36fd3SMian Yousaf Kaukab #ifdef CONFIG_PM 1794bc36fd3SMian Yousaf Kaukab static int ux500_suspend(struct device *dev) 1804bc36fd3SMian Yousaf Kaukab { 1814bc36fd3SMian Yousaf Kaukab struct ux500_glue *glue = dev_get_drvdata(dev); 1824bc36fd3SMian Yousaf Kaukab struct musb *musb = glue_to_musb(glue); 1834bc36fd3SMian Yousaf Kaukab 184b96d3b08SHeikki Krogerus usb_phy_set_suspend(musb->xceiv, 1); 1854bc36fd3SMian Yousaf Kaukab clk_disable(glue->clk); 1864bc36fd3SMian Yousaf Kaukab 1874bc36fd3SMian Yousaf Kaukab return 0; 1884bc36fd3SMian Yousaf Kaukab } 1894bc36fd3SMian Yousaf Kaukab 1904bc36fd3SMian Yousaf Kaukab static int ux500_resume(struct device *dev) 1914bc36fd3SMian Yousaf Kaukab { 1924bc36fd3SMian Yousaf Kaukab struct ux500_glue *glue = dev_get_drvdata(dev); 1934bc36fd3SMian Yousaf Kaukab struct musb *musb = glue_to_musb(glue); 1944bc36fd3SMian Yousaf Kaukab int ret; 1954bc36fd3SMian Yousaf Kaukab 1964bc36fd3SMian Yousaf Kaukab ret = clk_enable(glue->clk); 1974bc36fd3SMian Yousaf Kaukab if (ret) { 1984bc36fd3SMian Yousaf Kaukab dev_err(dev, "failed to enable clock\n"); 1994bc36fd3SMian Yousaf Kaukab return ret; 2004bc36fd3SMian Yousaf Kaukab } 2014bc36fd3SMian Yousaf Kaukab 202b96d3b08SHeikki Krogerus usb_phy_set_suspend(musb->xceiv, 0); 2034bc36fd3SMian Yousaf Kaukab 2044bc36fd3SMian Yousaf Kaukab return 0; 2054bc36fd3SMian Yousaf Kaukab } 2064bc36fd3SMian Yousaf Kaukab 2074bc36fd3SMian Yousaf Kaukab static const struct dev_pm_ops ux500_pm_ops = { 2084bc36fd3SMian Yousaf Kaukab .suspend = ux500_suspend, 2094bc36fd3SMian Yousaf Kaukab .resume = ux500_resume, 2104bc36fd3SMian Yousaf Kaukab }; 2114bc36fd3SMian Yousaf Kaukab 2124bc36fd3SMian Yousaf Kaukab #define DEV_PM_OPS (&ux500_pm_ops) 2134bc36fd3SMian Yousaf Kaukab #else 2144bc36fd3SMian Yousaf Kaukab #define DEV_PM_OPS NULL 2154bc36fd3SMian Yousaf Kaukab #endif 2164bc36fd3SMian Yousaf Kaukab 2174bc36fd3SMian Yousaf Kaukab static struct platform_driver ux500_driver = { 218e9e8c85eSFelipe Balbi .probe = ux500_probe, 219e9e8c85eSFelipe Balbi .remove = __devexit_p(ux500_remove), 2204bc36fd3SMian Yousaf Kaukab .driver = { 2214bc36fd3SMian Yousaf Kaukab .name = "musb-ux500", 2224bc36fd3SMian Yousaf Kaukab .pm = DEV_PM_OPS, 2234bc36fd3SMian Yousaf Kaukab }, 2244bc36fd3SMian Yousaf Kaukab }; 2254bc36fd3SMian Yousaf Kaukab 2264bc36fd3SMian Yousaf Kaukab MODULE_DESCRIPTION("UX500 MUSB Glue Layer"); 2274bc36fd3SMian Yousaf Kaukab MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>"); 2284bc36fd3SMian Yousaf Kaukab MODULE_LICENSE("GPL v2"); 2290e7090a6SSrinivas Kandagatla module_platform_driver(ux500_driver); 230