1 /* 2 * OHCI HCD (Host Controller Driver) for USB. 3 * 4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> 5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> 6 * (C) Copyright 2002 Hewlett-Packard Company 7 * (C) Copyright 2006 Sylvain Munaut <tnt@246tNt.com> 8 * 9 * Bus glue for OHCI HC on the of_platform bus 10 * 11 * Modified for of_platform bus from ohci-sa1111.c 12 * 13 * This file is licenced under the GPL. 14 */ 15 16 #include <linux/signal.h> 17 #include <linux/of_platform.h> 18 19 #include <asm/prom.h> 20 21 22 static int __devinit 23 ohci_ppc_of_start(struct usb_hcd *hcd) 24 { 25 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 26 int ret; 27 28 if ((ret = ohci_init(ohci)) < 0) 29 return ret; 30 31 if ((ret = ohci_run(ohci)) < 0) { 32 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name); 33 ohci_stop(hcd); 34 return ret; 35 } 36 37 return 0; 38 } 39 40 static const struct hc_driver ohci_ppc_of_hc_driver = { 41 .description = hcd_name, 42 .product_desc = "OF OHCI", 43 .hcd_priv_size = sizeof(struct ohci_hcd), 44 45 /* 46 * generic hardware linkage 47 */ 48 .irq = ohci_irq, 49 .flags = HCD_USB11 | HCD_MEMORY, 50 51 /* 52 * basic lifecycle operations 53 */ 54 .start = ohci_ppc_of_start, 55 .stop = ohci_stop, 56 .shutdown = ohci_shutdown, 57 58 /* 59 * managing i/o requests and associated device resources 60 */ 61 .urb_enqueue = ohci_urb_enqueue, 62 .urb_dequeue = ohci_urb_dequeue, 63 .endpoint_disable = ohci_endpoint_disable, 64 65 /* 66 * scheduling support 67 */ 68 .get_frame_number = ohci_get_frame, 69 70 /* 71 * root hub support 72 */ 73 .hub_status_data = ohci_hub_status_data, 74 .hub_control = ohci_hub_control, 75 #ifdef CONFIG_PM 76 .bus_suspend = ohci_bus_suspend, 77 .bus_resume = ohci_bus_resume, 78 #endif 79 .start_port_reset = ohci_start_port_reset, 80 }; 81 82 83 static int __devinit 84 ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) 85 { 86 struct device_node *dn = op->node; 87 struct usb_hcd *hcd; 88 struct ohci_hcd *ohci; 89 struct resource res; 90 int irq; 91 92 int rv; 93 int is_bigendian; 94 95 if (usb_disabled()) 96 return -ENODEV; 97 98 is_bigendian = 99 of_device_is_compatible(dn, "ohci-bigendian") || 100 of_device_is_compatible(dn, "ohci-be"); 101 102 dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); 103 104 rv = of_address_to_resource(dn, 0, &res); 105 if (rv) 106 return rv; 107 108 hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB"); 109 if (!hcd) 110 return -ENOMEM; 111 112 hcd->rsrc_start = res.start; 113 hcd->rsrc_len = res.end - res.start + 1; 114 115 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 116 printk(KERN_ERR __FILE__ ": request_mem_region failed\n"); 117 rv = -EBUSY; 118 goto err_rmr; 119 } 120 121 irq = irq_of_parse_and_map(dn, 0); 122 if (irq == NO_IRQ) { 123 printk(KERN_ERR __FILE__ ": irq_of_parse_and_map failed\n"); 124 rv = -EBUSY; 125 goto err_irq; 126 } 127 128 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 129 if (!hcd->regs) { 130 printk(KERN_ERR __FILE__ ": ioremap failed\n"); 131 rv = -ENOMEM; 132 goto err_ioremap; 133 } 134 135 ohci = hcd_to_ohci(hcd); 136 if (is_bigendian) { 137 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; 138 if (of_device_is_compatible(dn, "fsl,mpc5200-ohci")) 139 ohci->flags |= OHCI_QUIRK_FRAME_NO; 140 if (of_device_is_compatible(dn, "mpc5200-ohci")) 141 ohci->flags |= OHCI_QUIRK_FRAME_NO; 142 } 143 144 ohci_hcd_init(ohci); 145 146 rv = usb_add_hcd(hcd, irq, IRQF_DISABLED); 147 if (rv == 0) 148 return 0; 149 150 iounmap(hcd->regs); 151 err_ioremap: 152 irq_dispose_mapping(irq); 153 err_irq: 154 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 155 err_rmr: 156 usb_put_hcd(hcd); 157 158 return rv; 159 } 160 161 static int ohci_hcd_ppc_of_remove(struct of_device *op) 162 { 163 struct usb_hcd *hcd = dev_get_drvdata(&op->dev); 164 dev_set_drvdata(&op->dev, NULL); 165 166 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); 167 168 usb_remove_hcd(hcd); 169 170 iounmap(hcd->regs); 171 irq_dispose_mapping(hcd->irq); 172 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 173 174 usb_put_hcd(hcd); 175 176 return 0; 177 } 178 179 static int ohci_hcd_ppc_of_shutdown(struct of_device *op) 180 { 181 struct usb_hcd *hcd = dev_get_drvdata(&op->dev); 182 183 if (hcd->driver->shutdown) 184 hcd->driver->shutdown(hcd); 185 186 return 0; 187 } 188 189 190 static struct of_device_id ohci_hcd_ppc_of_match[] = { 191 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE 192 { 193 .name = "usb", 194 .compatible = "ohci-bigendian", 195 }, 196 { 197 .name = "usb", 198 .compatible = "ohci-be", 199 }, 200 #endif 201 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE 202 { 203 .name = "usb", 204 .compatible = "ohci-littledian", 205 }, 206 { 207 .name = "usb", 208 .compatible = "ohci-le", 209 }, 210 #endif 211 {}, 212 }; 213 MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); 214 215 #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ 216 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) 217 #error "No endianess selected for ppc-of-ohci" 218 #endif 219 220 221 static struct of_platform_driver ohci_hcd_ppc_of_driver = { 222 .name = "ppc-of-ohci", 223 .match_table = ohci_hcd_ppc_of_match, 224 .probe = ohci_hcd_ppc_of_probe, 225 .remove = ohci_hcd_ppc_of_remove, 226 .shutdown = ohci_hcd_ppc_of_shutdown, 227 #ifdef CONFIG_PM 228 /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/ 229 /*.resume = ohci_hcd_ppc_soc_drv_resume,*/ 230 #endif 231 .driver = { 232 .name = "ppc-of-ohci", 233 .owner = THIS_MODULE, 234 }, 235 }; 236 237