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 #include <linux/err.h> 17 #include <linux/platform_device.h> 18 #include <linux/usb/ohci_pdriver.h> 19 20 static int ohci_platform_reset(struct usb_hcd *hcd) 21 { 22 struct platform_device *pdev = to_platform_device(hcd->self.controller); 23 struct usb_ohci_pdata *pdata = pdev->dev.platform_data; 24 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 25 int err; 26 27 if (pdata->big_endian_desc) 28 ohci->flags |= OHCI_QUIRK_BE_DESC; 29 if (pdata->big_endian_mmio) 30 ohci->flags |= OHCI_QUIRK_BE_MMIO; 31 if (pdata->no_big_frame_no) 32 ohci->flags |= OHCI_QUIRK_FRAME_NO; 33 34 ohci_hcd_init(ohci); 35 36 if (pdata->num_ports) 37 ohci->num_ports = pdata->num_ports; 38 39 err = ohci_init(ohci); 40 41 return err; 42 } 43 44 static int ohci_platform_start(struct usb_hcd *hcd) 45 { 46 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 47 int err; 48 49 err = ohci_run(ohci); 50 if (err < 0) { 51 ohci_err(ohci, "can't start\n"); 52 ohci_stop(hcd); 53 } 54 55 return err; 56 } 57 58 static const struct hc_driver ohci_platform_hc_driver = { 59 .description = hcd_name, 60 .product_desc = "Generic Platform OHCI Controller", 61 .hcd_priv_size = sizeof(struct ohci_hcd), 62 63 .irq = ohci_irq, 64 .flags = HCD_MEMORY | HCD_USB11, 65 66 .reset = ohci_platform_reset, 67 .start = ohci_platform_start, 68 .stop = ohci_stop, 69 .shutdown = ohci_shutdown, 70 71 .urb_enqueue = ohci_urb_enqueue, 72 .urb_dequeue = ohci_urb_dequeue, 73 .endpoint_disable = ohci_endpoint_disable, 74 75 .get_frame_number = ohci_get_frame, 76 77 .hub_status_data = ohci_hub_status_data, 78 .hub_control = ohci_hub_control, 79 #ifdef CONFIG_PM 80 .bus_suspend = ohci_bus_suspend, 81 .bus_resume = ohci_bus_resume, 82 #endif 83 84 .start_port_reset = ohci_start_port_reset, 85 }; 86 87 static int ohci_platform_probe(struct platform_device *dev) 88 { 89 struct usb_hcd *hcd; 90 struct resource *res_mem; 91 struct usb_ohci_pdata *pdata = dev->dev.platform_data; 92 int irq; 93 int err = -ENOMEM; 94 95 if (!pdata) { 96 WARN_ON(1); 97 return -ENODEV; 98 } 99 100 if (usb_disabled()) 101 return -ENODEV; 102 103 irq = platform_get_irq(dev, 0); 104 if (irq < 0) { 105 dev_err(&dev->dev, "no irq provided"); 106 return irq; 107 } 108 109 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0); 110 if (!res_mem) { 111 dev_err(&dev->dev, "no memory resource provided"); 112 return -ENXIO; 113 } 114 115 if (pdata->power_on) { 116 err = pdata->power_on(dev); 117 if (err < 0) 118 return err; 119 } 120 121 hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev, 122 dev_name(&dev->dev)); 123 if (!hcd) { 124 err = -ENOMEM; 125 goto err_power; 126 } 127 128 hcd->rsrc_start = res_mem->start; 129 hcd->rsrc_len = resource_size(res_mem); 130 131 hcd->regs = devm_ioremap_resource(&dev->dev, res_mem); 132 if (IS_ERR(hcd->regs)) { 133 err = PTR_ERR(hcd->regs); 134 goto err_put_hcd; 135 } 136 err = usb_add_hcd(hcd, irq, IRQF_SHARED); 137 if (err) 138 goto err_put_hcd; 139 140 platform_set_drvdata(dev, hcd); 141 142 return err; 143 144 err_put_hcd: 145 usb_put_hcd(hcd); 146 err_power: 147 if (pdata->power_off) 148 pdata->power_off(dev); 149 150 return err; 151 } 152 153 static int ohci_platform_remove(struct platform_device *dev) 154 { 155 struct usb_hcd *hcd = platform_get_drvdata(dev); 156 struct usb_ohci_pdata *pdata = dev->dev.platform_data; 157 158 usb_remove_hcd(hcd); 159 usb_put_hcd(hcd); 160 platform_set_drvdata(dev, NULL); 161 162 if (pdata->power_off) 163 pdata->power_off(dev); 164 165 return 0; 166 } 167 168 #ifdef CONFIG_PM 169 170 static int ohci_platform_suspend(struct device *dev) 171 { 172 struct usb_ohci_pdata *pdata = dev->platform_data; 173 struct platform_device *pdev = 174 container_of(dev, struct platform_device, dev); 175 176 if (pdata->power_suspend) 177 pdata->power_suspend(pdev); 178 179 return 0; 180 } 181 182 static int ohci_platform_resume(struct device *dev) 183 { 184 struct usb_hcd *hcd = dev_get_drvdata(dev); 185 struct usb_ohci_pdata *pdata = dev->platform_data; 186 struct platform_device *pdev = 187 container_of(dev, struct platform_device, dev); 188 189 if (pdata->power_on) { 190 int err = pdata->power_on(pdev); 191 if (err < 0) 192 return err; 193 } 194 195 ohci_resume(hcd, false); 196 return 0; 197 } 198 199 #else /* !CONFIG_PM */ 200 #define ohci_platform_suspend NULL 201 #define ohci_platform_resume NULL 202 #endif /* CONFIG_PM */ 203 204 static const struct platform_device_id ohci_platform_table[] = { 205 { "ohci-platform", 0 }, 206 { } 207 }; 208 MODULE_DEVICE_TABLE(platform, ohci_platform_table); 209 210 static const struct dev_pm_ops ohci_platform_pm_ops = { 211 .suspend = ohci_platform_suspend, 212 .resume = ohci_platform_resume, 213 }; 214 215 static struct platform_driver ohci_platform_driver = { 216 .id_table = ohci_platform_table, 217 .probe = ohci_platform_probe, 218 .remove = ohci_platform_remove, 219 .shutdown = usb_hcd_platform_shutdown, 220 .driver = { 221 .owner = THIS_MODULE, 222 .name = "ohci-platform", 223 .pm = &ohci_platform_pm_ops, 224 } 225 }; 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