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 * 8 * SA1111 Bus Glue 9 * 10 * Written by Christopher Hoover <ch@hpl.hp.com> 11 * Based on fragments of previous driver by Russell King et al. 12 * 13 * This file is licenced under the GPL. 14 */ 15 16#include <mach/hardware.h> 17#include <asm/mach-types.h> 18#include <mach/assabet.h> 19#include <mach/badge4.h> 20#include <asm/hardware/sa1111.h> 21 22#ifndef CONFIG_SA1111 23#error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined." 24#endif 25 26extern int usb_disabled(void); 27 28/*-------------------------------------------------------------------------*/ 29 30static void sa1111_start_hc(struct sa1111_dev *dev) 31{ 32 unsigned int usb_rst = 0; 33 34 printk(KERN_DEBUG "%s: starting SA-1111 OHCI USB Controller\n", 35 __FILE__); 36 37#ifdef CONFIG_SA1100_BADGE4 38 if (machine_is_badge4()) { 39 badge4_set_5V(BADGE4_5V_USB, 1); 40 } 41#endif 42 43 if (machine_is_xp860() || 44 machine_has_neponset() || 45 machine_is_pfs168() || 46 machine_is_badge4()) 47 usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW; 48 49 /* 50 * Configure the power sense and control lines. Place the USB 51 * host controller in reset. 52 */ 53 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET, 54 dev->mapbase + SA1111_USB_RESET); 55 56 /* 57 * Now, carefully enable the USB clock, and take 58 * the USB host controller out of reset. 59 */ 60 sa1111_enable_device(dev); 61 udelay(11); 62 sa1111_writel(usb_rst, dev->mapbase + SA1111_USB_RESET); 63} 64 65static void sa1111_stop_hc(struct sa1111_dev *dev) 66{ 67 unsigned int usb_rst; 68 printk(KERN_DEBUG "%s: stopping SA-1111 OHCI USB Controller\n", 69 __FILE__); 70 71 /* 72 * Put the USB host controller into reset. 73 */ 74 usb_rst = sa1111_readl(dev->mapbase + SA1111_USB_RESET); 75 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET, 76 dev->mapbase + SA1111_USB_RESET); 77 78 /* 79 * Stop the USB clock. 80 */ 81 sa1111_disable_device(dev); 82 83#ifdef CONFIG_SA1100_BADGE4 84 if (machine_is_badge4()) { 85 /* Disable power to the USB bus */ 86 badge4_set_5V(BADGE4_5V_USB, 0); 87 } 88#endif 89} 90 91 92/*-------------------------------------------------------------------------*/ 93 94 95/*-------------------------------------------------------------------------*/ 96 97/* configure so an HC device and id are always provided */ 98/* always called with process context; sleeping is OK */ 99 100 101/** 102 * usb_hcd_sa1111_probe - initialize SA-1111-based HCDs 103 * Context: !in_interrupt() 104 * 105 * Allocates basic resources for this USB host controller, and 106 * then invokes the start() method for the HCD associated with it 107 * through the hotplug entry's driver_data. 108 * 109 * Store this function in the HCD's struct pci_driver as probe(). 110 */ 111int usb_hcd_sa1111_probe (const struct hc_driver *driver, 112 struct sa1111_dev *dev) 113{ 114 struct usb_hcd *hcd; 115 int retval; 116 117 hcd = usb_create_hcd (driver, &dev->dev, "sa1111"); 118 if (!hcd) 119 return -ENOMEM; 120 hcd->rsrc_start = dev->res.start; 121 hcd->rsrc_len = dev->res.end - dev->res.start + 1; 122 123 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 124 dbg("request_mem_region failed"); 125 retval = -EBUSY; 126 goto err1; 127 } 128 hcd->regs = dev->mapbase; 129 130 sa1111_start_hc(dev); 131 ohci_hcd_init(hcd_to_ohci(hcd)); 132 133 retval = usb_add_hcd(hcd, dev->irq[1], IRQF_DISABLED); 134 if (retval == 0) 135 return retval; 136 137 sa1111_stop_hc(dev); 138 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 139 err1: 140 usb_put_hcd(hcd); 141 return retval; 142} 143 144 145/* may be called without controller electrically present */ 146/* may be called with controller, bus, and devices active */ 147 148/** 149 * usb_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs 150 * @dev: USB Host Controller being removed 151 * Context: !in_interrupt() 152 * 153 * Reverses the effect of usb_hcd_sa1111_probe(), first invoking 154 * the HCD's stop() method. It is always called from a thread 155 * context, normally "rmmod", "apmd", or something similar. 156 * 157 */ 158void usb_hcd_sa1111_remove (struct usb_hcd *hcd, struct sa1111_dev *dev) 159{ 160 usb_remove_hcd(hcd); 161 sa1111_stop_hc(dev); 162 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 163 usb_put_hcd(hcd); 164} 165 166/*-------------------------------------------------------------------------*/ 167 168static int __devinit 169ohci_sa1111_start (struct usb_hcd *hcd) 170{ 171 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 172 int ret; 173 174 if ((ret = ohci_init(ohci)) < 0) 175 return ret; 176 177 if ((ret = ohci_run (ohci)) < 0) { 178 err ("can't start %s", hcd->self.bus_name); 179 ohci_stop (hcd); 180 return ret; 181 } 182 return 0; 183} 184 185/*-------------------------------------------------------------------------*/ 186 187static const struct hc_driver ohci_sa1111_hc_driver = { 188 .description = hcd_name, 189 .product_desc = "SA-1111 OHCI", 190 .hcd_priv_size = sizeof(struct ohci_hcd), 191 192 /* 193 * generic hardware linkage 194 */ 195 .irq = ohci_irq, 196 .flags = HCD_USB11 | HCD_MEMORY, 197 198 /* 199 * basic lifecycle operations 200 */ 201 .start = ohci_sa1111_start, 202 .stop = ohci_stop, 203 204 /* 205 * managing i/o requests and associated device resources 206 */ 207 .urb_enqueue = ohci_urb_enqueue, 208 .urb_dequeue = ohci_urb_dequeue, 209 .endpoint_disable = ohci_endpoint_disable, 210 211 /* 212 * scheduling support 213 */ 214 .get_frame_number = ohci_get_frame, 215 216 /* 217 * root hub support 218 */ 219 .hub_status_data = ohci_hub_status_data, 220 .hub_control = ohci_hub_control, 221#ifdef CONFIG_PM 222 .bus_suspend = ohci_bus_suspend, 223 .bus_resume = ohci_bus_resume, 224#endif 225 .start_port_reset = ohci_start_port_reset, 226}; 227 228/*-------------------------------------------------------------------------*/ 229 230static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev) 231{ 232 int ret; 233 234 if (usb_disabled()) 235 return -ENODEV; 236 237 ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev); 238 return ret; 239} 240 241static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev) 242{ 243 struct usb_hcd *hcd = sa1111_get_drvdata(dev); 244 245 usb_hcd_sa1111_remove(hcd, dev); 246 return 0; 247} 248 249static struct sa1111_driver ohci_hcd_sa1111_driver = { 250 .drv = { 251 .name = "sa1111-ohci", 252 }, 253 .devid = SA1111_DEVID_USB, 254 .probe = ohci_hcd_sa1111_drv_probe, 255 .remove = ohci_hcd_sa1111_drv_remove, 256}; 257