Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * SA1111 Bus Glue |
| 9 | * |
| 10 | * Written by Christopher Hoover <ch@hpl.hp.com> |
| 11 | * Based on fragments of previous driver by Rusell King et al. |
| 12 | * |
| 13 | * This file is licenced under the GPL. |
| 14 | */ |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <asm/hardware.h> |
| 17 | #include <asm/mach-types.h> |
| 18 | #include <asm/arch/assabet.h> |
| 19 | #include <asm/arch/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 | |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 34 | printk(KERN_DEBUG __FILE__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | ": starting SA-1111 OHCI USB Controller\n"); |
| 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; |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 68 | printk(KERN_DEBUG __FILE__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | ": stopping SA-1111 OHCI USB Controller\n"); |
| 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 = dev->res.end - dev->res.start + 1; |
| 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 | |
Thomas Gleixner | d54b5ca | 2006-07-01 19:29:44 -0700 | [diff] [blame] | 146 | retval = usb_add_hcd(hcd, dev->irq[1], IRQF_DISABLED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
David Brownell | d413984 | 2006-08-04 11:31:55 -0700 | [diff] [blame] | 234 | .hub_irq_enable = ohci_rhsc_enable, |
David Brownell | 8ad7fe1 | 2005-09-13 19:59:11 -0700 | [diff] [blame] | 235 | #ifdef CONFIG_PM |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 236 | .bus_suspend = ohci_bus_suspend, |
| 237 | .bus_resume = ohci_bus_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | #endif |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 239 | .start_port_reset = ohci_start_port_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | }; |
| 241 | |
| 242 | /*-------------------------------------------------------------------------*/ |
| 243 | |
| 244 | static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev) |
| 245 | { |
| 246 | int ret; |
| 247 | |
| 248 | if (usb_disabled()) |
| 249 | return -ENODEV; |
| 250 | |
| 251 | ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev); |
| 252 | return ret; |
| 253 | } |
| 254 | |
| 255 | static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev) |
| 256 | { |
| 257 | struct usb_hcd *hcd = sa1111_get_drvdata(dev); |
| 258 | |
| 259 | usb_hcd_sa1111_remove(hcd, dev); |
| 260 | return 0; |
| 261 | } |
| 262 | |
| 263 | static struct sa1111_driver ohci_hcd_sa1111_driver = { |
| 264 | .drv = { |
| 265 | .name = "sa1111-ohci", |
| 266 | }, |
| 267 | .devid = SA1111_DEVID_USB, |
| 268 | .probe = ohci_hcd_sa1111_drv_probe, |
| 269 | .remove = ohci_hcd_sa1111_drv_remove, |
| 270 | }; |
| 271 | |