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 18 #include <asm/of_platform.h> 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 .hub_irq_enable = ohci_rhsc_enable, 76 #ifdef CONFIG_PM 77 .bus_suspend = ohci_bus_suspend, 78 .bus_resume = ohci_bus_resume, 79 #endif 80 .start_port_reset = ohci_start_port_reset, 81 }; 82 83 84 static int __devinit 85 ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) 86 { 87 struct device_node *dn = op->node; 88 struct usb_hcd *hcd; 89 struct ohci_hcd *ohci; 90 struct resource res; 91 int irq; 92 93 int rv; 94 int is_bigendian; 95 96 if (usb_disabled()) 97 return -ENODEV; 98 99 is_bigendian = 100 of_device_is_compatible(dn, "ohci-bigendian") || 101 of_device_is_compatible(dn, "ohci-be"); 102 103 dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); 104 105 rv = of_address_to_resource(dn, 0, &res); 106 if (rv) 107 return rv; 108 109 hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB"); 110 if (!hcd) 111 return -ENOMEM; 112 113 hcd->rsrc_start = res.start; 114 hcd->rsrc_len = res.end - res.start + 1; 115 116 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 117 printk(KERN_ERR __FILE__ ": request_mem_region failed\n"); 118 rv = -EBUSY; 119 goto err_rmr; 120 } 121 122 irq = irq_of_parse_and_map(dn, 0); 123 if (irq == NO_IRQ) { 124 printk(KERN_ERR __FILE__ ": irq_of_parse_and_map failed\n"); 125 rv = -EBUSY; 126 goto err_irq; 127 } 128 129 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 130 if (!hcd->regs) { 131 printk(KERN_ERR __FILE__ ": ioremap failed\n"); 132 rv = -ENOMEM; 133 goto err_ioremap; 134 } 135 136 ohci = hcd_to_ohci(hcd); 137 if (is_bigendian) 138 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; 139 140 ohci_hcd_init(ohci); 141 142 rv = usb_add_hcd(hcd, irq, 0); 143 if (rv == 0) 144 return 0; 145 146 iounmap(hcd->regs); 147 err_ioremap: 148 irq_dispose_mapping(irq); 149 err_irq: 150 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 151 err_rmr: 152 usb_put_hcd(hcd); 153 154 return rv; 155 } 156 157 static int ohci_hcd_ppc_of_remove(struct of_device *op) 158 { 159 struct usb_hcd *hcd = dev_get_drvdata(&op->dev); 160 dev_set_drvdata(&op->dev, NULL); 161 162 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); 163 164 usb_remove_hcd(hcd); 165 166 iounmap(hcd->regs); 167 irq_dispose_mapping(hcd->irq); 168 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 169 170 usb_put_hcd(hcd); 171 172 return 0; 173 } 174 175 static int ohci_hcd_ppc_of_shutdown(struct of_device *op) 176 { 177 struct usb_hcd *hcd = dev_get_drvdata(&op->dev); 178 179 if (hcd->driver->shutdown) 180 hcd->driver->shutdown(hcd); 181 182 return 0; 183 } 184 185 186 static struct of_device_id ohci_hcd_ppc_of_match[] = { 187 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE 188 { 189 .name = "usb", 190 .compatible = "ohci-bigendian", 191 }, 192 { 193 .name = "usb", 194 .compatible = "ohci-be", 195 }, 196 #endif 197 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE 198 { 199 .name = "usb", 200 .compatible = "ohci-littledian", 201 }, 202 { 203 .name = "usb", 204 .compatible = "ohci-le", 205 }, 206 #endif 207 {}, 208 }; 209 MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); 210 211 #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ 212 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) 213 #error "No endianess selected for ppc-of-ohci" 214 #endif 215 216 217 static struct of_platform_driver ohci_hcd_ppc_of_driver = { 218 .name = "ppc-of-ohci", 219 .match_table = ohci_hcd_ppc_of_match, 220 .probe = ohci_hcd_ppc_of_probe, 221 .remove = ohci_hcd_ppc_of_remove, 222 .shutdown = ohci_hcd_ppc_of_shutdown, 223 #ifdef CONFIG_PM 224 /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/ 225 /*.resume = ohci_hcd_ppc_soc_drv_resume,*/ 226 #endif 227 .driver = { 228 .name = "ppc-of-ohci", 229 .owner = THIS_MODULE, 230 }, 231 }; 232 233