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 <asm/hardware/sa1111.h> 20 21 #ifndef CONFIG_SA1111 22 #error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined." 23 #endif 24 25 #define USB_STATUS 0x0118 26 #define USB_RESET 0x011c 27 #define USB_IRQTEST 0x0120 28 29 #define USB_RESET_FORCEIFRESET (1 << 0) 30 #define USB_RESET_FORCEHCRESET (1 << 1) 31 #define USB_RESET_CLKGENRESET (1 << 2) 32 #define USB_RESET_SIMSCALEDOWN (1 << 3) 33 #define USB_RESET_USBINTTEST (1 << 4) 34 #define USB_RESET_SLEEPSTBYEN (1 << 5) 35 #define USB_RESET_PWRSENSELOW (1 << 6) 36 #define USB_RESET_PWRCTRLLOW (1 << 7) 37 38 #define USB_STATUS_IRQHCIRMTWKUP (1 << 7) 39 #define USB_STATUS_IRQHCIBUFFACC (1 << 8) 40 #define USB_STATUS_NIRQHCIM (1 << 9) 41 #define USB_STATUS_NHCIMFCLR (1 << 10) 42 #define USB_STATUS_USBPWRSENSE (1 << 11) 43 44 #if 0 45 static void dump_hci_status(struct usb_hcd *hcd, const char *label) 46 { 47 unsigned long status = sa1111_readl(hcd->regs + USB_STATUS); 48 49 printk(KERN_DEBUG "%s USB_STATUS = { %s%s%s%s%s}\n", label, 50 ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""), 51 ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""), 52 ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "), 53 ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "), 54 ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : "")); 55 } 56 #endif 57 58 static int ohci_sa1111_reset(struct usb_hcd *hcd) 59 { 60 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 61 62 ohci_hcd_init(ohci); 63 return ohci_init(ohci); 64 } 65 66 static int ohci_sa1111_start(struct usb_hcd *hcd) 67 { 68 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 69 int ret; 70 71 ret = ohci_run(ohci); 72 if (ret < 0) { 73 ohci_err(ohci, "can't start\n"); 74 ohci_stop(hcd); 75 } 76 return ret; 77 } 78 79 static const struct hc_driver ohci_sa1111_hc_driver = { 80 .description = hcd_name, 81 .product_desc = "SA-1111 OHCI", 82 .hcd_priv_size = sizeof(struct ohci_hcd), 83 84 /* 85 * generic hardware linkage 86 */ 87 .irq = ohci_irq, 88 .flags = HCD_USB11 | HCD_MEMORY, 89 90 /* 91 * basic lifecycle operations 92 */ 93 .reset = ohci_sa1111_reset, 94 .start = ohci_sa1111_start, 95 .stop = ohci_stop, 96 .shutdown = ohci_shutdown, 97 98 /* 99 * managing i/o requests and associated device resources 100 */ 101 .urb_enqueue = ohci_urb_enqueue, 102 .urb_dequeue = ohci_urb_dequeue, 103 .endpoint_disable = ohci_endpoint_disable, 104 105 /* 106 * scheduling support 107 */ 108 .get_frame_number = ohci_get_frame, 109 110 /* 111 * root hub support 112 */ 113 .hub_status_data = ohci_hub_status_data, 114 .hub_control = ohci_hub_control, 115 #ifdef CONFIG_PM 116 .bus_suspend = ohci_bus_suspend, 117 .bus_resume = ohci_bus_resume, 118 #endif 119 .start_port_reset = ohci_start_port_reset, 120 }; 121 122 static int sa1111_start_hc(struct sa1111_dev *dev) 123 { 124 unsigned int usb_rst = 0; 125 int ret; 126 127 dev_dbg(&dev->dev, "starting SA-1111 OHCI USB Controller\n"); 128 129 if (machine_is_xp860() || 130 machine_has_neponset() || 131 machine_is_pfs168() || 132 machine_is_badge4()) 133 usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW; 134 135 /* 136 * Configure the power sense and control lines. Place the USB 137 * host controller in reset. 138 */ 139 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET, 140 dev->mapbase + USB_RESET); 141 142 /* 143 * Now, carefully enable the USB clock, and take 144 * the USB host controller out of reset. 145 */ 146 ret = sa1111_enable_device(dev); 147 if (ret == 0) { 148 udelay(11); 149 sa1111_writel(usb_rst, dev->mapbase + USB_RESET); 150 } 151 152 return ret; 153 } 154 155 static void sa1111_stop_hc(struct sa1111_dev *dev) 156 { 157 unsigned int usb_rst; 158 159 dev_dbg(&dev->dev, "stopping SA-1111 OHCI USB Controller\n"); 160 161 /* 162 * Put the USB host controller into reset. 163 */ 164 usb_rst = sa1111_readl(dev->mapbase + USB_RESET); 165 sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET, 166 dev->mapbase + USB_RESET); 167 168 /* 169 * Stop the USB clock. 170 */ 171 sa1111_disable_device(dev); 172 } 173 174 /** 175 * ohci_hcd_sa1111_probe - initialize SA-1111-based HCDs 176 * 177 * Allocates basic resources for this USB host controller, and 178 * then invokes the start() method for the HCD associated with it. 179 */ 180 static int ohci_hcd_sa1111_probe(struct sa1111_dev *dev) 181 { 182 struct usb_hcd *hcd; 183 int ret; 184 185 if (usb_disabled()) 186 return -ENODEV; 187 188 /* 189 * We don't call dma_set_mask_and_coherent() here because the 190 * DMA mask has already been appropraitely setup by the core 191 * SA-1111 bus code (which includes bug workarounds.) 192 */ 193 194 hcd = usb_create_hcd(&ohci_sa1111_hc_driver, &dev->dev, "sa1111"); 195 if (!hcd) 196 return -ENOMEM; 197 198 hcd->rsrc_start = dev->res.start; 199 hcd->rsrc_len = resource_size(&dev->res); 200 201 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 202 dev_dbg(&dev->dev, "request_mem_region failed\n"); 203 ret = -EBUSY; 204 goto err1; 205 } 206 207 hcd->regs = dev->mapbase; 208 209 ret = sa1111_start_hc(dev); 210 if (ret) 211 goto err2; 212 213 ret = usb_add_hcd(hcd, dev->irq[1], 0); 214 if (ret == 0) { 215 device_wakeup_enable(hcd->self.controller); 216 return ret; 217 } 218 219 sa1111_stop_hc(dev); 220 err2: 221 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 222 err1: 223 usb_put_hcd(hcd); 224 return ret; 225 } 226 227 /** 228 * ohci_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs 229 * @dev: USB Host Controller being removed 230 * 231 * Reverses the effect of ohci_hcd_sa1111_probe(), first invoking 232 * the HCD's stop() method. 233 */ 234 static int ohci_hcd_sa1111_remove(struct sa1111_dev *dev) 235 { 236 struct usb_hcd *hcd = sa1111_get_drvdata(dev); 237 238 usb_remove_hcd(hcd); 239 sa1111_stop_hc(dev); 240 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 241 usb_put_hcd(hcd); 242 243 return 0; 244 } 245 246 static void ohci_hcd_sa1111_shutdown(struct sa1111_dev *dev) 247 { 248 struct usb_hcd *hcd = sa1111_get_drvdata(dev); 249 250 if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { 251 hcd->driver->shutdown(hcd); 252 sa1111_stop_hc(dev); 253 } 254 } 255 256 static struct sa1111_driver ohci_hcd_sa1111_driver = { 257 .drv = { 258 .name = "sa1111-ohci", 259 .owner = THIS_MODULE, 260 }, 261 .devid = SA1111_DEVID_USB, 262 .probe = ohci_hcd_sa1111_probe, 263 .remove = ohci_hcd_sa1111_remove, 264 .shutdown = ohci_hcd_sa1111_shutdown, 265 }; 266