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Linux/drivers/usb/host/ohci-platform.c

  1 /*
  2  * Generic platform ohci driver
  3  *
  4  * Copyright 2007 Michael Buesch <m@bues.ch>
  5  * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
  6  *
  7  * Derived from the OCHI-SSB driver
  8  * Derived from the OHCI-PCI driver
  9  * Copyright 1999 Roman Weissgaerber
 10  * Copyright 2000-2002 David Brownell
 11  * Copyright 1999 Linus Torvalds
 12  * Copyright 1999 Gregory P. Smith
 13  *
 14  * Licensed under the GNU/GPL. See COPYING for details.
 15  */
 16 
 17 #include <linux/hrtimer.h>
 18 #include <linux/io.h>
 19 #include <linux/kernel.h>
 20 #include <linux/module.h>
 21 #include <linux/err.h>
 22 #include <linux/platform_device.h>
 23 #include <linux/usb/ohci_pdriver.h>
 24 #include <linux/usb.h>
 25 #include <linux/usb/hcd.h>
 26 
 27 #include "ohci.h"
 28 
 29 #define DRIVER_DESC "OHCI generic platform driver"
 30 
 31 static const char hcd_name[] = "ohci-platform";
 32 
 33 static int ohci_platform_reset(struct usb_hcd *hcd)
 34 {
 35         struct platform_device *pdev = to_platform_device(hcd->self.controller);
 36         struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);
 37         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 38 
 39         if (pdata->big_endian_desc)
 40                 ohci->flags |= OHCI_QUIRK_BE_DESC;
 41         if (pdata->big_endian_mmio)
 42                 ohci->flags |= OHCI_QUIRK_BE_MMIO;
 43         if (pdata->no_big_frame_no)
 44                 ohci->flags |= OHCI_QUIRK_FRAME_NO;
 45         if (pdata->num_ports)
 46                 ohci->num_ports = pdata->num_ports;
 47 
 48         return ohci_setup(hcd);
 49 }
 50 
 51 static struct hc_driver __read_mostly ohci_platform_hc_driver;
 52 
 53 static const struct ohci_driver_overrides platform_overrides __initconst = {
 54         .product_desc = "Generic Platform OHCI controller",
 55         .reset =        ohci_platform_reset,
 56 };
 57 
 58 static int ohci_platform_probe(struct platform_device *dev)
 59 {
 60         struct usb_hcd *hcd;
 61         struct resource *res_mem;
 62         struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
 63         int irq;
 64         int err = -ENOMEM;
 65 
 66         if (!pdata) {
 67                 WARN_ON(1);
 68                 return -ENODEV;
 69         }
 70 
 71         if (usb_disabled())
 72                 return -ENODEV;
 73 
 74         irq = platform_get_irq(dev, 0);
 75         if (irq < 0) {
 76                 dev_err(&dev->dev, "no irq provided");
 77                 return irq;
 78         }
 79 
 80         res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 81         if (!res_mem) {
 82                 dev_err(&dev->dev, "no memory resource provided");
 83                 return -ENXIO;
 84         }
 85 
 86         if (pdata->power_on) {
 87                 err = pdata->power_on(dev);
 88                 if (err < 0)
 89                         return err;
 90         }
 91 
 92         hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 93                         dev_name(&dev->dev));
 94         if (!hcd) {
 95                 err = -ENOMEM;
 96                 goto err_power;
 97         }
 98 
 99         hcd->rsrc_start = res_mem->start;
100         hcd->rsrc_len = resource_size(res_mem);
101 
102         hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
103         if (IS_ERR(hcd->regs)) {
104                 err = PTR_ERR(hcd->regs);
105                 goto err_put_hcd;
106         }
107         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
108         if (err)
109                 goto err_put_hcd;
110 
111         device_wakeup_enable(hcd->self.controller);
112 
113         platform_set_drvdata(dev, hcd);
114 
115         return err;
116 
117 err_put_hcd:
118         usb_put_hcd(hcd);
119 err_power:
120         if (pdata->power_off)
121                 pdata->power_off(dev);
122 
123         return err;
124 }
125 
126 static int ohci_platform_remove(struct platform_device *dev)
127 {
128         struct usb_hcd *hcd = platform_get_drvdata(dev);
129         struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
130 
131         usb_remove_hcd(hcd);
132         usb_put_hcd(hcd);
133 
134         if (pdata->power_off)
135                 pdata->power_off(dev);
136 
137         return 0;
138 }
139 
140 #ifdef CONFIG_PM
141 
142 static int ohci_platform_suspend(struct device *dev)
143 {
144         struct usb_hcd *hcd = dev_get_drvdata(dev);
145         struct usb_ohci_pdata *pdata = dev->platform_data;
146         struct platform_device *pdev =
147                 container_of(dev, struct platform_device, dev);
148         bool do_wakeup = device_may_wakeup(dev);
149         int ret;
150 
151         ret = ohci_suspend(hcd, do_wakeup);
152         if (ret)
153                 return ret;
154 
155         if (pdata->power_suspend)
156                 pdata->power_suspend(pdev);
157 
158         return ret;
159 }
160 
161 static int ohci_platform_resume(struct device *dev)
162 {
163         struct usb_hcd *hcd = dev_get_drvdata(dev);
164         struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
165         struct platform_device *pdev =
166                 container_of(dev, struct platform_device, dev);
167 
168         if (pdata->power_on) {
169                 int err = pdata->power_on(pdev);
170                 if (err < 0)
171                         return err;
172         }
173 
174         ohci_resume(hcd, false);
175         return 0;
176 }
177 
178 #else /* !CONFIG_PM */
179 #define ohci_platform_suspend   NULL
180 #define ohci_platform_resume    NULL
181 #endif /* CONFIG_PM */
182 
183 static const struct platform_device_id ohci_platform_table[] = {
184         { "ohci-platform", 0 },
185         { }
186 };
187 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
188 
189 static const struct dev_pm_ops ohci_platform_pm_ops = {
190         .suspend        = ohci_platform_suspend,
191         .resume         = ohci_platform_resume,
192 };
193 
194 static struct platform_driver ohci_platform_driver = {
195         .id_table       = ohci_platform_table,
196         .probe          = ohci_platform_probe,
197         .remove         = ohci_platform_remove,
198         .shutdown       = usb_hcd_platform_shutdown,
199         .driver         = {
200                 .owner  = THIS_MODULE,
201                 .name   = "ohci-platform",
202                 .pm     = &ohci_platform_pm_ops,
203         }
204 };
205 
206 static int __init ohci_platform_init(void)
207 {
208         if (usb_disabled())
209                 return -ENODEV;
210 
211         pr_info("%s: " DRIVER_DESC "\n", hcd_name);
212 
213         ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
214         return platform_driver_register(&ohci_platform_driver);
215 }
216 module_init(ohci_platform_init);
217 
218 static void __exit ohci_platform_cleanup(void)
219 {
220         platform_driver_unregister(&ohci_platform_driver);
221 }
222 module_exit(ohci_platform_cleanup);
223 
224 MODULE_DESCRIPTION(DRIVER_DESC);
225 MODULE_AUTHOR("Hauke Mehrtens");
226 MODULE_AUTHOR("Alan Stern");
227 MODULE_LICENSE("GPL");
228 

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