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 platform_set_drvdata(dev, hcd); 112 113 return err; 114 115 err_put_hcd: 116 usb_put_hcd(hcd); 117 err_power: 118 if (pdata->power_off) 119 pdata->power_off(dev); 120 121 return err; 122 } 123 124 static int ohci_platform_remove(struct platform_device *dev) 125 { 126 struct usb_hcd *hcd = platform_get_drvdata(dev); 127 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev); 128 129 usb_remove_hcd(hcd); 130 usb_put_hcd(hcd); 131 132 if (pdata->power_off) 133 pdata->power_off(dev); 134 135 return 0; 136 } 137 138 #ifdef CONFIG_PM 139 140 static int ohci_platform_suspend(struct device *dev) 141 { 142 struct usb_hcd *hcd = dev_get_drvdata(dev); 143 struct usb_ohci_pdata *pdata = dev->platform_data; 144 struct platform_device *pdev = 145 container_of(dev, struct platform_device, dev); 146 bool do_wakeup = device_may_wakeup(dev); 147 int ret; 148 149 ret = ohci_suspend(hcd, do_wakeup); 150 if (ret) 151 return ret; 152 153 if (pdata->power_suspend) 154 pdata->power_suspend(pdev); 155 156 return ret; 157 } 158 159 static int ohci_platform_resume(struct device *dev) 160 { 161 struct usb_hcd *hcd = dev_get_drvdata(dev); 162 struct usb_ohci_pdata *pdata = dev_get_platdata(dev); 163 struct platform_device *pdev = 164 container_of(dev, struct platform_device, dev); 165 166 if (pdata->power_on) { 167 int err = pdata->power_on(pdev); 168 if (err < 0) 169 return err; 170 } 171 172 ohci_resume(hcd, false); 173 return 0; 174 } 175 176 #else /* !CONFIG_PM */ 177 #define ohci_platform_suspend NULL 178 #define ohci_platform_resume NULL 179 #endif /* CONFIG_PM */ 180 181 static const struct platform_device_id ohci_platform_table[] = { 182 { "ohci-platform", 0 }, 183 { } 184 }; 185 MODULE_DEVICE_TABLE(platform, ohci_platform_table); 186 187 static const struct dev_pm_ops ohci_platform_pm_ops = { 188 .suspend = ohci_platform_suspend, 189 .resume = ohci_platform_resume, 190 }; 191 192 static struct platform_driver ohci_platform_driver = { 193 .id_table = ohci_platform_table, 194 .probe = ohci_platform_probe, 195 .remove = ohci_platform_remove, 196 .shutdown = usb_hcd_platform_shutdown, 197 .driver = { 198 .owner = THIS_MODULE, 199 .name = "ohci-platform", 200 .pm = &ohci_platform_pm_ops, 201 } 202 }; 203 204 static int __init ohci_platform_init(void) 205 { 206 if (usb_disabled()) 207 return -ENODEV; 208 209 pr_info("%s: " DRIVER_DESC "\n", hcd_name); 210 211 ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides); 212 return platform_driver_register(&ohci_platform_driver); 213 } 214 module_init(ohci_platform_init); 215 216 static void __exit ohci_platform_cleanup(void) 217 { 218 platform_driver_unregister(&ohci_platform_driver); 219 } 220 module_exit(ohci_platform_cleanup); 221 222 MODULE_DESCRIPTION(DRIVER_DESC); 223 MODULE_AUTHOR("Hauke Mehrtens"); 224 MODULE_AUTHOR("Alan Stern"); 225 MODULE_LICENSE("GPL"); 226