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 26 extern int usb_disabled(void); 27 28 /*-------------------------------------------------------------------------*/ 29 30 static 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 65 static 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 #if 0 95 static void dump_hci_status(struct usb_hcd *hcd, const char *label) 96 { 97 unsigned long status = sa1111_readl(hcd->regs + SA1111_USB_STATUS); 98 99 dbg ("%s USB_STATUS = { %s%s%s%s%s}", label, 100 ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""), 101 ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""), 102 ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "), 103 ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "), 104 ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : "")); 105 } 106 #endif 107 108 /*-------------------------------------------------------------------------*/ 109 110 /* configure so an HC device and id are always provided */ 111 /* always called with process context; sleeping is OK */ 112 113 114 /** 115 * usb_hcd_sa1111_probe - initialize SA-1111-based HCDs 116 * Context: !in_interrupt() 117 * 118 * Allocates basic resources for this USB host controller, and 119 * then invokes the start() method for the HCD associated with it 120 * through the hotplug entry's driver_data. 121 * 122 * Store this function in the HCD's struct pci_driver as probe(). 123 */ 124 int usb_hcd_sa1111_probe (const struct hc_driver *driver, 125 struct sa1111_dev *dev) 126 { 127 struct usb_hcd *hcd; 128 int retval; 129 130 hcd = usb_create_hcd (driver, &dev->dev, "sa1111"); 131 if (!hcd) 132 return -ENOMEM; 133 hcd->rsrc_start = dev->res.start; 134 hcd->rsrc_len = resource_size(&dev->res); 135 136 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 137 dbg("request_mem_region failed"); 138 retval = -EBUSY; 139 goto err1; 140 } 141 hcd->regs = dev->mapbase; 142 143 sa1111_start_hc(dev); 144 ohci_hcd_init(hcd_to_ohci(hcd)); 145 146 retval = usb_add_hcd(hcd, dev->irq[1], IRQF_DISABLED); 147 if (retval == 0) 148 return retval; 149 150 sa1111_stop_hc(dev); 151 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 152 err1: 153 usb_put_hcd(hcd); 154 return retval; 155 } 156 157 158 /* may be called without controller electrically present */ 159 /* may be called with controller, bus, and devices active */ 160 161 /** 162 * usb_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs 163 * @dev: USB Host Controller being removed 164 * Context: !in_interrupt() 165 * 166 * Reverses the effect of usb_hcd_sa1111_probe(), first invoking 167 * the HCD's stop() method. It is always called from a thread 168 * context, normally "rmmod", "apmd", or something similar. 169 * 170 */ 171 void usb_hcd_sa1111_remove (struct usb_hcd *hcd, struct sa1111_dev *dev) 172 { 173 usb_remove_hcd(hcd); 174 sa1111_stop_hc(dev); 175 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 176 usb_put_hcd(hcd); 177 } 178 179 /*-------------------------------------------------------------------------*/ 180 181 static int __devinit 182 ohci_sa1111_start (struct usb_hcd *hcd) 183 { 184 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 185 int ret; 186 187 if ((ret = ohci_init(ohci)) < 0) 188 return ret; 189 190 if ((ret = ohci_run (ohci)) < 0) { 191 err ("can't start %s", hcd->self.bus_name); 192 ohci_stop (hcd); 193 return ret; 194 } 195 return 0; 196 } 197 198 /*-------------------------------------------------------------------------*/ 199 200 static const struct hc_driver ohci_sa1111_hc_driver = { 201 .description = hcd_name, 202 .product_desc = "SA-1111 OHCI", 203 .hcd_priv_size = sizeof(struct ohci_hcd), 204 205 /* 206 * generic hardware linkage 207 */ 208 .irq = ohci_irq, 209 .flags = HCD_USB11 | HCD_MEMORY, 210 211 /* 212 * basic lifecycle operations 213 */ 214 .start = ohci_sa1111_start, 215 .stop = ohci_stop, 216 217 /* 218 * managing i/o requests and associated device resources 219 */ 220 .urb_enqueue = ohci_urb_enqueue, 221 .urb_dequeue = ohci_urb_dequeue, 222 .endpoint_disable = ohci_endpoint_disable, 223 224 /* 225 * scheduling support 226 */ 227 .get_frame_number = ohci_get_frame, 228 229 /* 230 * root hub support 231 */ 232 .hub_status_data = ohci_hub_status_data, 233 .hub_control = ohci_hub_control, 234 #ifdef CONFIG_PM 235 .bus_suspend = ohci_bus_suspend, 236 .bus_resume = ohci_bus_resume, 237 #endif 238 .start_port_reset = ohci_start_port_reset, 239 }; 240 241 /*-------------------------------------------------------------------------*/ 242 243 static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev) 244 { 245 int ret; 246 247 if (usb_disabled()) 248 return -ENODEV; 249 250 ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev); 251 return ret; 252 } 253 254 static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev) 255 { 256 struct usb_hcd *hcd = sa1111_get_drvdata(dev); 257 258 usb_hcd_sa1111_remove(hcd, dev); 259 return 0; 260 } 261 262 static struct sa1111_driver ohci_hcd_sa1111_driver = { 263 .drv = { 264 .name = "sa1111-ohci", 265 }, 266 .devid = SA1111_DEVID_USB, 267 .probe = ohci_hcd_sa1111_drv_probe, 268 .remove = ohci_hcd_sa1111_drv_remove, 269 }; 270 271