Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2003-2008 Takahiro Hirofuchi |
| 3 | * |
| 4 | * This is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 17 | * USA. |
| 18 | */ |
| 19 | |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 20 | #include <linux/init.h> |
| 21 | #include <linux/kernel.h> |
Arnd Bergmann | 9720b4b | 2011-03-02 00:13:05 +0100 | [diff] [blame] | 22 | #include <linux/kthread.h> |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 23 | #include <linux/module.h> |
| 24 | #include <linux/platform_device.h> |
| 25 | #include <linux/slab.h> |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 26 | |
| 27 | #include "usbip_common.h" |
| 28 | #include "vhci.h" |
| 29 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 30 | #define DRIVER_AUTHOR "Takahiro Hirofuchi" |
matt mooney | 64e6242 | 2011-05-11 22:33:44 -0700 | [diff] [blame] | 31 | #define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver" |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 32 | |
| 33 | /* |
| 34 | * TODO |
| 35 | * - update root hub emulation |
| 36 | * - move the emulation code to userland ? |
| 37 | * porting to other operating systems |
| 38 | * minimize kernel code |
| 39 | * - add suspend/resume code |
| 40 | * - clean up everything |
| 41 | */ |
| 42 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 43 | /* See usb gadget dummy hcd */ |
| 44 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 45 | static int vhci_hub_status(struct usb_hcd *hcd, char *buff); |
| 46 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 47 | u16 wIndex, char *buff, u16 wLength); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 48 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 49 | gfp_t mem_flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 50 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
| 51 | static int vhci_start(struct usb_hcd *vhci_hcd); |
| 52 | static void vhci_stop(struct usb_hcd *hcd); |
| 53 | static int vhci_get_frame_number(struct usb_hcd *hcd); |
| 54 | |
| 55 | static const char driver_name[] = "vhci_hcd"; |
Robert P. J. Day | f5e08ca7 | 2009-11-13 15:13:43 -0500 | [diff] [blame] | 56 | static const char driver_desc[] = "USB/IP Virtual Host Controller"; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 57 | |
| 58 | struct vhci_hcd *the_controller; |
| 59 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 60 | static const char * const bit_desc[] = { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 61 | "CONNECTION", /*0*/ |
| 62 | "ENABLE", /*1*/ |
| 63 | "SUSPEND", /*2*/ |
| 64 | "OVER_CURRENT", /*3*/ |
| 65 | "RESET", /*4*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 66 | "R5", /*5*/ |
| 67 | "R6", /*6*/ |
| 68 | "R7", /*7*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 69 | "POWER", /*8*/ |
| 70 | "LOWSPEED", /*9*/ |
| 71 | "HIGHSPEED", /*10*/ |
| 72 | "PORT_TEST", /*11*/ |
| 73 | "INDICATOR", /*12*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 74 | "R13", /*13*/ |
| 75 | "R14", /*14*/ |
| 76 | "R15", /*15*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 77 | "C_CONNECTION", /*16*/ |
| 78 | "C_ENABLE", /*17*/ |
| 79 | "C_SUSPEND", /*18*/ |
| 80 | "C_OVER_CURRENT", /*19*/ |
| 81 | "C_RESET", /*20*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 82 | "R21", /*21*/ |
| 83 | "R22", /*22*/ |
| 84 | "R23", /*23*/ |
| 85 | "R24", /*24*/ |
| 86 | "R25", /*25*/ |
| 87 | "R26", /*26*/ |
| 88 | "R27", /*27*/ |
| 89 | "R28", /*28*/ |
| 90 | "R29", /*29*/ |
| 91 | "R30", /*30*/ |
| 92 | "R31", /*31*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 93 | }; |
| 94 | |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 95 | static void dump_port_status_diff(u32 prev_status, u32 new_status) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 96 | { |
| 97 | int i = 0; |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 98 | u32 bit = 1; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 99 | |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 100 | pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status); |
| 101 | while (bit) { |
| 102 | u32 prev = prev_status & bit; |
| 103 | u32 new = new_status & bit; |
| 104 | char change; |
| 105 | |
| 106 | if (!prev && new) |
| 107 | change = '+'; |
| 108 | else if (prev && !new) |
| 109 | change = '-'; |
| 110 | else |
| 111 | change = ' '; |
| 112 | |
| 113 | if (prev || new) |
| 114 | pr_debug(" %c%s\n", change, bit_desc[i]); |
| 115 | bit <<= 1; |
| 116 | i++; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 117 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 118 | pr_debug("\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 119 | } |
| 120 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 121 | void rh_port_connect(int rhport, enum usb_device_speed speed) |
| 122 | { |
| 123 | unsigned long flags; |
| 124 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 125 | usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 126 | |
| 127 | spin_lock_irqsave(&the_controller->lock, flags); |
| 128 | |
| 129 | the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION |
| 130 | | (1 << USB_PORT_FEAT_C_CONNECTION); |
| 131 | |
| 132 | switch (speed) { |
| 133 | case USB_SPEED_HIGH: |
| 134 | the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED; |
| 135 | break; |
| 136 | case USB_SPEED_LOW: |
| 137 | the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED; |
| 138 | break; |
| 139 | default: |
| 140 | break; |
| 141 | } |
| 142 | |
| 143 | /* spin_lock(&the_controller->vdev[rhport].ud.lock); |
| 144 | * the_controller->vdev[rhport].ud.status = VDEV_CONNECT; |
| 145 | * spin_unlock(&the_controller->vdev[rhport].ud.lock); */ |
| 146 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 147 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 148 | |
| 149 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
| 150 | } |
| 151 | |
| 152 | void rh_port_disconnect(int rhport) |
| 153 | { |
| 154 | unsigned long flags; |
| 155 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 156 | usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 157 | |
| 158 | spin_lock_irqsave(&the_controller->lock, flags); |
| 159 | /* stop_activity(dum, driver); */ |
| 160 | the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION; |
| 161 | the_controller->port_status[rhport] |= |
| 162 | (1 << USB_PORT_FEAT_C_CONNECTION); |
| 163 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 164 | /* not yet complete the disconnection |
| 165 | * spin_lock(&vdev->ud.lock); |
| 166 | * vdev->ud.status = VHC_ST_DISCONNECT; |
| 167 | * spin_unlock(&vdev->ud.lock); */ |
| 168 | |
| 169 | spin_unlock_irqrestore(&the_controller->lock, flags); |
Max Vozeler | 0c9a32f | 2010-09-21 17:31:40 +0200 | [diff] [blame] | 170 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 171 | } |
| 172 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 173 | #define PORT_C_MASK \ |
| 174 | ((USB_PORT_STAT_C_CONNECTION \ |
| 175 | | USB_PORT_STAT_C_ENABLE \ |
| 176 | | USB_PORT_STAT_C_SUSPEND \ |
| 177 | | USB_PORT_STAT_C_OVERCURRENT \ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 178 | | USB_PORT_STAT_C_RESET) << 16) |
| 179 | |
| 180 | /* |
| 181 | * This function is almostly the same as dummy_hcd.c:dummy_hub_status() without |
| 182 | * suspend/resume support. But, it is modified to provide multiple ports. |
| 183 | * |
| 184 | * @buf: a bitmap to show which port status has been changed. |
| 185 | * bit 0: reserved or used for another purpose? |
| 186 | * bit 1: the status of port 0 has been changed. |
| 187 | * bit 2: the status of port 1 has been changed. |
| 188 | * ... |
| 189 | * bit 7: the status of port 6 has been changed. |
| 190 | * bit 8: the status of port 7 has been changed. |
| 191 | * ... |
| 192 | * bit 15: the status of port 14 has been changed. |
| 193 | * |
| 194 | * So, the maximum number of ports is 31 ( port 0 to port 30) ? |
| 195 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 196 | * The return value is the actual transferred length in byte. If nothing has |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 197 | * been changed, return 0. In the case that the number of ports is less than or |
| 198 | * equal to 6 (VHCI_NPORTS==7), return 1. |
| 199 | * |
| 200 | */ |
| 201 | static int vhci_hub_status(struct usb_hcd *hcd, char *buf) |
| 202 | { |
| 203 | struct vhci_hcd *vhci; |
| 204 | unsigned long flags; |
| 205 | int retval = 0; |
| 206 | |
| 207 | /* the enough buffer is allocated according to USB_MAXCHILDREN */ |
| 208 | unsigned long *event_bits = (unsigned long *) buf; |
| 209 | int rhport; |
| 210 | int changed = 0; |
| 211 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 212 | *event_bits = 0; |
| 213 | |
| 214 | vhci = hcd_to_vhci(hcd); |
| 215 | |
| 216 | spin_lock_irqsave(&vhci->lock, flags); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 217 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 218 | usbip_dbg_vhci_rh("hw accessible flag in on?\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 219 | goto done; |
| 220 | } |
| 221 | |
| 222 | /* check pseudo status register for each port */ |
| 223 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
| 224 | if ((vhci->port_status[rhport] & PORT_C_MASK)) { |
| 225 | /* The status of a port has been changed, */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 226 | usbip_dbg_vhci_rh("port %d is changed\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 227 | |
| 228 | *event_bits |= 1 << (rhport + 1); |
| 229 | changed = 1; |
| 230 | } |
| 231 | } |
| 232 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 233 | pr_info("changed %d\n", changed); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 234 | |
| 235 | if (hcd->state == HC_STATE_SUSPENDED) |
| 236 | usb_hcd_resume_root_hub(hcd); |
| 237 | |
| 238 | if (changed) |
| 239 | retval = 1 + (VHCI_NPORTS / 8); |
| 240 | else |
| 241 | retval = 0; |
| 242 | |
| 243 | done: |
| 244 | spin_unlock_irqrestore(&vhci->lock, flags); |
| 245 | return retval; |
| 246 | } |
| 247 | |
| 248 | /* See hub_configure in hub.c */ |
| 249 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
| 250 | { |
| 251 | memset(desc, 0, sizeof(*desc)); |
| 252 | desc->bDescriptorType = 0x29; |
| 253 | desc->bDescLength = 9; |
| 254 | desc->wHubCharacteristics = (__force __u16) |
| 255 | (__constant_cpu_to_le16(0x0001)); |
| 256 | desc->bNbrPorts = VHCI_NPORTS; |
John Youn | dbe79bb | 2001-09-17 00:00:00 -0700 | [diff] [blame] | 257 | desc->u.hs.DeviceRemovable[0] = 0xff; |
| 258 | desc->u.hs.DeviceRemovable[1] = 0xff; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 262 | u16 wIndex, char *buf, u16 wLength) |
| 263 | { |
| 264 | struct vhci_hcd *dum; |
| 265 | int retval = 0; |
| 266 | unsigned long flags; |
| 267 | int rhport; |
| 268 | |
| 269 | u32 prev_port_status[VHCI_NPORTS]; |
| 270 | |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 271 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 272 | return -ETIMEDOUT; |
| 273 | |
| 274 | /* |
| 275 | * NOTE: |
| 276 | * wIndex shows the port number and begins from 1. |
| 277 | */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 278 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 279 | wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 280 | if (wIndex > VHCI_NPORTS) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 281 | pr_err("invalid port number %d\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 282 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
| 283 | |
| 284 | dum = hcd_to_vhci(hcd); |
| 285 | |
| 286 | spin_lock_irqsave(&dum->lock, flags); |
| 287 | |
| 288 | /* store old status and compare now and old later */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 289 | if (usbip_dbg_flag_vhci_rh) { |
Márton Németh | 6f480bf | 2011-06-13 23:30:09 +0200 | [diff] [blame] | 290 | memcpy(prev_port_status, dum->port_status, |
| 291 | sizeof(prev_port_status)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | switch (typeReq) { |
| 295 | case ClearHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 296 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 297 | break; |
| 298 | case ClearPortFeature: |
| 299 | switch (wValue) { |
| 300 | case USB_PORT_FEAT_SUSPEND: |
| 301 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { |
| 302 | /* 20msec signaling */ |
| 303 | dum->resuming = 1; |
| 304 | dum->re_timeout = |
| 305 | jiffies + msecs_to_jiffies(20); |
| 306 | } |
| 307 | break; |
| 308 | case USB_PORT_FEAT_POWER: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 309 | usbip_dbg_vhci_rh(" ClearPortFeature: " |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 310 | "USB_PORT_FEAT_POWER\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 311 | dum->port_status[rhport] = 0; |
| 312 | /* dum->address = 0; */ |
| 313 | /* dum->hdev = 0; */ |
| 314 | dum->resuming = 0; |
| 315 | break; |
| 316 | case USB_PORT_FEAT_C_RESET: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 317 | usbip_dbg_vhci_rh(" ClearPortFeature: " |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 318 | "USB_PORT_FEAT_C_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 319 | switch (dum->vdev[rhport].speed) { |
| 320 | case USB_SPEED_HIGH: |
| 321 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 322 | USB_PORT_STAT_HIGH_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 323 | break; |
| 324 | case USB_SPEED_LOW: |
| 325 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 326 | USB_PORT_STAT_LOW_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 327 | break; |
| 328 | default: |
| 329 | break; |
| 330 | } |
| 331 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 332 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 333 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 334 | dum->port_status[rhport] &= ~(1 << wValue); |
matt mooney | 49aecef | 2011-05-06 03:47:54 -0700 | [diff] [blame] | 335 | break; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 336 | } |
| 337 | break; |
| 338 | case GetHubDescriptor: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 339 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 340 | hub_descriptor((struct usb_hub_descriptor *) buf); |
| 341 | break; |
| 342 | case GetHubStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 343 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 344 | *(__le32 *) buf = __constant_cpu_to_le32(0); |
| 345 | break; |
| 346 | case GetPortStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 347 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 348 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 349 | pr_err("invalid port number %d\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 350 | retval = -EPIPE; |
| 351 | } |
| 352 | |
| 353 | /* we do no care of resume. */ |
| 354 | |
| 355 | /* whoever resets or resumes must GetPortStatus to |
| 356 | * complete it!! |
| 357 | * */ |
| 358 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 359 | dum->port_status[rhport] |= |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 360 | (1 << USB_PORT_FEAT_C_SUSPEND); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 361 | dum->port_status[rhport] &= |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 362 | ~(1 << USB_PORT_FEAT_SUSPEND); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 363 | dum->resuming = 0; |
| 364 | dum->re_timeout = 0; |
| 365 | /* if (dum->driver && dum->driver->resume) { |
| 366 | * spin_unlock (&dum->lock); |
| 367 | * dum->driver->resume (&dum->gadget); |
| 368 | * spin_lock (&dum->lock); |
| 369 | * } */ |
| 370 | } |
| 371 | |
| 372 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 373 | 0 && time_after(jiffies, dum->re_timeout)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 374 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 375 | (1 << USB_PORT_FEAT_C_RESET); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 376 | dum->port_status[rhport] &= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 377 | ~(1 << USB_PORT_FEAT_RESET); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 378 | dum->re_timeout = 0; |
| 379 | |
| 380 | if (dum->vdev[rhport].ud.status == |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 381 | VDEV_ST_NOTASSIGNED) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 382 | usbip_dbg_vhci_rh(" enable rhport %d " |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 383 | "(status %u)\n", |
| 384 | rhport, |
| 385 | dum->vdev[rhport].ud.status); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 386 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 387 | USB_PORT_STAT_ENABLE; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 388 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 389 | } |
| 390 | ((u16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 391 | ((u16 *) buf)[1] = cpu_to_le16(dum->port_status[rhport] >> 16); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 392 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 393 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 394 | ((u16 *)buf)[1]); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 395 | break; |
| 396 | case SetHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 397 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 398 | retval = -EPIPE; |
| 399 | break; |
| 400 | case SetPortFeature: |
| 401 | switch (wValue) { |
| 402 | case USB_PORT_FEAT_SUSPEND: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 403 | usbip_dbg_vhci_rh(" SetPortFeature: " |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 404 | "USB_PORT_FEAT_SUSPEND\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 405 | break; |
| 406 | case USB_PORT_FEAT_RESET: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 407 | usbip_dbg_vhci_rh(" SetPortFeature: " |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 408 | "USB_PORT_FEAT_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 409 | /* if it's already running, disconnect first */ |
| 410 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { |
| 411 | dum->port_status[rhport] &= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 412 | ~(USB_PORT_STAT_ENABLE | |
| 413 | USB_PORT_STAT_LOW_SPEED | |
| 414 | USB_PORT_STAT_HIGH_SPEED); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 415 | /* FIXME test that code path! */ |
| 416 | } |
| 417 | /* 50msec reset signaling */ |
| 418 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
| 419 | |
| 420 | /* FALLTHROUGH */ |
| 421 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 422 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 423 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 424 | dum->port_status[rhport] |= (1 << wValue); |
matt mooney | 49aecef | 2011-05-06 03:47:54 -0700 | [diff] [blame] | 425 | break; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 426 | } |
| 427 | break; |
| 428 | |
| 429 | default: |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 430 | pr_err("default: no such request\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 431 | /* dev_dbg (hardware, |
| 432 | * "hub control req%04x v%04x i%04x l%d\n", |
| 433 | * typeReq, wValue, wIndex, wLength); */ |
| 434 | |
| 435 | /* "protocol stall" on error */ |
| 436 | retval = -EPIPE; |
| 437 | } |
| 438 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 439 | if (usbip_dbg_flag_vhci_rh) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 440 | pr_debug("port %d\n", rhport); |
Márton Németh | bfb4ce2 | 2011-06-13 23:47:39 +0200 | [diff] [blame] | 441 | /* Only dump valid port status */ |
| 442 | if (rhport >= 0) { |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 443 | dump_port_status_diff(prev_port_status[rhport], |
| 444 | dum->port_status[rhport]); |
Márton Németh | bfb4ce2 | 2011-06-13 23:47:39 +0200 | [diff] [blame] | 445 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 446 | } |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 447 | usbip_dbg_vhci_rh(" bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 448 | |
| 449 | spin_unlock_irqrestore(&dum->lock, flags); |
| 450 | |
| 451 | return retval; |
| 452 | } |
| 453 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 454 | static struct vhci_device *get_vdev(struct usb_device *udev) |
| 455 | { |
| 456 | int i; |
| 457 | |
| 458 | if (!udev) |
| 459 | return NULL; |
| 460 | |
| 461 | for (i = 0; i < VHCI_NPORTS; i++) |
| 462 | if (the_controller->vdev[i].udev == udev) |
| 463 | return port_to_vdev(i); |
| 464 | |
| 465 | return NULL; |
| 466 | } |
| 467 | |
| 468 | static void vhci_tx_urb(struct urb *urb) |
| 469 | { |
| 470 | struct vhci_device *vdev = get_vdev(urb->dev); |
| 471 | struct vhci_priv *priv; |
| 472 | unsigned long flag; |
| 473 | |
| 474 | if (!vdev) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 475 | pr_err("could not get virtual device"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 476 | /* BUG(); */ |
| 477 | return; |
| 478 | } |
| 479 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 480 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
| 481 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 482 | spin_lock_irqsave(&vdev->priv_lock, flag); |
| 483 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 484 | if (!priv) { |
| 485 | dev_err(&urb->dev->dev, "malloc vhci_priv\n"); |
| 486 | spin_unlock_irqrestore(&vdev->priv_lock, flag); |
| 487 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 488 | return; |
| 489 | } |
| 490 | |
| 491 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
| 492 | if (priv->seqnum == 0xffff) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 493 | dev_info(&urb->dev->dev, "seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 494 | |
| 495 | priv->vdev = vdev; |
| 496 | priv->urb = urb; |
| 497 | |
| 498 | urb->hcpriv = (void *) priv; |
| 499 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 500 | list_add_tail(&priv->list, &vdev->priv_tx); |
| 501 | |
| 502 | wake_up(&vdev->waitq_tx); |
| 503 | spin_unlock_irqrestore(&vdev->priv_lock, flag); |
| 504 | } |
| 505 | |
| 506 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 507 | gfp_t mem_flags) |
| 508 | { |
| 509 | struct device *dev = &urb->dev->dev; |
| 510 | int ret = 0; |
| 511 | unsigned long flags; |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 512 | struct vhci_device *vdev; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 513 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 514 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 515 | hcd, urb, mem_flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 516 | |
| 517 | /* patch to usb_sg_init() is in 2.5.60 */ |
| 518 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); |
| 519 | |
| 520 | spin_lock_irqsave(&the_controller->lock, flags); |
| 521 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 522 | if (urb->status != -EINPROGRESS) { |
| 523 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); |
| 524 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 525 | return urb->status; |
| 526 | } |
| 527 | |
Max Vozeler | 01446ef | 2011-01-12 15:02:05 +0200 | [diff] [blame] | 528 | vdev = port_to_vdev(urb->dev->portnum-1); |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 529 | |
| 530 | /* refuse enqueue for dead connection */ |
| 531 | spin_lock(&vdev->ud.lock); |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 532 | if (vdev->ud.status == VDEV_ST_NULL || |
| 533 | vdev->ud.status == VDEV_ST_ERROR) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 534 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 535 | spin_unlock(&vdev->ud.lock); |
| 536 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 537 | return -ENODEV; |
| 538 | } |
| 539 | spin_unlock(&vdev->ud.lock); |
| 540 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 541 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
| 542 | if (ret) |
| 543 | goto no_need_unlink; |
| 544 | |
| 545 | /* |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 546 | * The enumeration process is as follows; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 547 | * |
| 548 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) |
| 549 | * to get max packet length of default pipe |
| 550 | * |
| 551 | * 2. Set_Address request to DevAddr(0) EndPoint(0) |
| 552 | * |
| 553 | */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 554 | if (usb_pipedevice(urb->pipe) == 0) { |
| 555 | __u8 type = usb_pipetype(urb->pipe); |
| 556 | struct usb_ctrlrequest *ctrlreq = |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 557 | (struct usb_ctrlrequest *) urb->setup_packet; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 558 | |
| 559 | if (type != PIPE_CONTROL || !ctrlreq) { |
| 560 | dev_err(dev, "invalid request to devnum 0\n"); |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 561 | ret = -EINVAL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 562 | goto no_need_xmit; |
| 563 | } |
| 564 | |
| 565 | switch (ctrlreq->bRequest) { |
| 566 | case USB_REQ_SET_ADDRESS: |
| 567 | /* set_address may come when a device is reset */ |
| 568 | dev_info(dev, "SetAddress Request (%d) to port %d\n", |
| 569 | ctrlreq->wValue, vdev->rhport); |
| 570 | |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 571 | if (vdev->udev) |
| 572 | usb_put_dev(vdev->udev); |
| 573 | vdev->udev = usb_get_dev(urb->dev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 574 | |
| 575 | spin_lock(&vdev->ud.lock); |
| 576 | vdev->ud.status = VDEV_ST_USED; |
| 577 | spin_unlock(&vdev->ud.lock); |
| 578 | |
| 579 | if (urb->status == -EINPROGRESS) { |
| 580 | /* This request is successfully completed. */ |
| 581 | /* If not -EINPROGRESS, possibly unlinked. */ |
| 582 | urb->status = 0; |
| 583 | } |
| 584 | |
| 585 | goto no_need_xmit; |
| 586 | |
| 587 | case USB_REQ_GET_DESCRIPTOR: |
| 588 | if (ctrlreq->wValue == (USB_DT_DEVICE << 8)) |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 589 | usbip_dbg_vhci_hc("Not yet?: " |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 590 | "Get_Descriptor to device 0 " |
| 591 | "(get max pipe size)\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 592 | |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 593 | if (vdev->udev) |
| 594 | usb_put_dev(vdev->udev); |
| 595 | vdev->udev = usb_get_dev(urb->dev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 596 | goto out; |
| 597 | |
| 598 | default: |
| 599 | /* NOT REACHED */ |
| 600 | dev_err(dev, "invalid request to devnum 0 bRequest %u, " |
| 601 | "wValue %u\n", ctrlreq->bRequest, |
| 602 | ctrlreq->wValue); |
| 603 | ret = -EINVAL; |
| 604 | goto no_need_xmit; |
| 605 | } |
| 606 | |
| 607 | } |
| 608 | |
| 609 | out: |
| 610 | vhci_tx_urb(urb); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 611 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 612 | |
| 613 | return 0; |
| 614 | |
| 615 | no_need_xmit: |
| 616 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 617 | no_need_unlink: |
| 618 | spin_unlock_irqrestore(&the_controller->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 619 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 620 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | /* |
| 624 | * vhci_rx gives back the urb after receiving the reply of the urb. If an |
| 625 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives |
| 626 | * back its urb. For the driver unlinking the urb, the content of the urb is |
| 627 | * not important, but the calling to its completion handler is important; the |
| 628 | * completion of unlinking is notified by the completion handler. |
| 629 | * |
| 630 | * |
| 631 | * CLIENT SIDE |
| 632 | * |
| 633 | * - When vhci_hcd receives RET_SUBMIT, |
| 634 | * |
| 635 | * - case 1a). the urb of the pdu is not unlinking. |
| 636 | * - normal case |
| 637 | * => just give back the urb |
| 638 | * |
| 639 | * - case 1b). the urb of the pdu is unlinking. |
| 640 | * - usbip.ko will return a reply of the unlinking request. |
| 641 | * => give back the urb now and go to case 2b). |
| 642 | * |
| 643 | * - When vhci_hcd receives RET_UNLINK, |
| 644 | * |
| 645 | * - case 2a). a submit request is still pending in vhci_hcd. |
| 646 | * - urb was really pending in usbip.ko and urb_unlink_urb() was |
| 647 | * completed there. |
| 648 | * => free a pending submit request |
| 649 | * => notify unlink completeness by giving back the urb |
| 650 | * |
| 651 | * - case 2b). a submit request is *not* pending in vhci_hcd. |
| 652 | * - urb was already given back to the core driver. |
| 653 | * => do not give back the urb |
| 654 | * |
| 655 | * |
| 656 | * SERVER SIDE |
| 657 | * |
| 658 | * - When usbip receives CMD_UNLINK, |
| 659 | * |
| 660 | * - case 3a). the urb of the unlink request is now in submission. |
| 661 | * => do usb_unlink_urb(). |
| 662 | * => after the unlink is completed, send RET_UNLINK. |
| 663 | * |
| 664 | * - case 3b). the urb of the unlink request is not in submission. |
| 665 | * - may be already completed or never be received |
| 666 | * => send RET_UNLINK |
| 667 | * |
| 668 | */ |
| 669 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 670 | { |
| 671 | unsigned long flags; |
| 672 | struct vhci_priv *priv; |
| 673 | struct vhci_device *vdev; |
| 674 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 675 | pr_info("dequeue a urb %p\n", urb); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 676 | |
| 677 | spin_lock_irqsave(&the_controller->lock, flags); |
| 678 | |
| 679 | priv = urb->hcpriv; |
| 680 | if (!priv) { |
| 681 | /* URB was never linked! or will be soon given back by |
| 682 | * vhci_rx. */ |
| 683 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 684 | return 0; |
| 685 | } |
| 686 | |
| 687 | { |
| 688 | int ret = 0; |
| 689 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 690 | if (ret) { |
| 691 | spin_unlock_irqrestore(&the_controller->lock, flags); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 692 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 693 | } |
| 694 | } |
| 695 | |
| 696 | /* send unlink request here? */ |
| 697 | vdev = priv->vdev; |
| 698 | |
| 699 | if (!vdev->ud.tcp_socket) { |
| 700 | /* tcp connection is closed */ |
| 701 | unsigned long flags2; |
| 702 | |
| 703 | spin_lock_irqsave(&vdev->priv_lock, flags2); |
| 704 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 705 | pr_info("device %p seems to be disconnected\n", vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 706 | list_del(&priv->list); |
| 707 | kfree(priv); |
| 708 | urb->hcpriv = NULL; |
| 709 | |
| 710 | spin_unlock_irqrestore(&vdev->priv_lock, flags2); |
| 711 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 712 | /* |
| 713 | * If tcp connection is alive, we have sent CMD_UNLINK. |
| 714 | * vhci_rx will receive RET_UNLINK and give back the URB. |
| 715 | * Otherwise, we give back it here. |
| 716 | */ |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 717 | pr_info("gives back urb %p\n", urb); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 718 | |
| 719 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 720 | |
| 721 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 722 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 723 | urb->status); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 724 | spin_lock_irqsave(&the_controller->lock, flags); |
| 725 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 726 | } else { |
| 727 | /* tcp connection is alive */ |
| 728 | unsigned long flags2; |
| 729 | struct vhci_unlink *unlink; |
| 730 | |
| 731 | spin_lock_irqsave(&vdev->priv_lock, flags2); |
| 732 | |
| 733 | /* setup CMD_UNLINK pdu */ |
| 734 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); |
| 735 | if (!unlink) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 736 | pr_err("malloc vhci_unlink\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 737 | spin_unlock_irqrestore(&vdev->priv_lock, flags2); |
| 738 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 739 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 740 | return -ENOMEM; |
| 741 | } |
| 742 | |
| 743 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); |
| 744 | if (unlink->seqnum == 0xffff) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 745 | pr_info("seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 746 | |
| 747 | unlink->unlink_seqnum = priv->seqnum; |
| 748 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 749 | pr_info("device %p seems to be still connected\n", vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 750 | |
| 751 | /* send cmd_unlink and try to cancel the pending URB in the |
| 752 | * peer */ |
| 753 | list_add_tail(&unlink->list, &vdev->unlink_tx); |
| 754 | wake_up(&vdev->waitq_tx); |
| 755 | |
| 756 | spin_unlock_irqrestore(&vdev->priv_lock, flags2); |
| 757 | } |
| 758 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 759 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 760 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 761 | usbip_dbg_vhci_hc("leave\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 762 | return 0; |
| 763 | } |
| 764 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 765 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
| 766 | { |
| 767 | struct vhci_unlink *unlink, *tmp; |
| 768 | |
| 769 | spin_lock(&vdev->priv_lock); |
| 770 | |
| 771 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 772 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 773 | list_del(&unlink->list); |
| 774 | kfree(unlink); |
| 775 | } |
| 776 | |
| 777 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) { |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 778 | struct urb *urb; |
| 779 | |
| 780 | /* give back URB of unanswered unlink request */ |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 781 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 782 | |
| 783 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); |
| 784 | if (!urb) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 785 | pr_info("the urb (seqnum %lu) was already given back\n", |
| 786 | unlink->unlink_seqnum); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 787 | list_del(&unlink->list); |
| 788 | kfree(unlink); |
| 789 | continue; |
| 790 | } |
| 791 | |
| 792 | urb->status = -ENODEV; |
| 793 | |
| 794 | spin_lock(&the_controller->lock); |
| 795 | usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); |
| 796 | spin_unlock(&the_controller->lock); |
| 797 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 798 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
| 799 | urb->status); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 800 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 801 | list_del(&unlink->list); |
| 802 | kfree(unlink); |
| 803 | } |
| 804 | |
| 805 | spin_unlock(&vdev->priv_lock); |
| 806 | } |
| 807 | |
| 808 | /* |
| 809 | * The important thing is that only one context begins cleanup. |
| 810 | * This is why error handling and cleanup become simple. |
| 811 | * We do not want to consider race condition as possible. |
| 812 | */ |
| 813 | static void vhci_shutdown_connection(struct usbip_device *ud) |
| 814 | { |
| 815 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
| 816 | |
| 817 | /* need this? see stub_dev.c */ |
| 818 | if (ud->tcp_socket) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 819 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 820 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
| 821 | } |
| 822 | |
Arnd Bergmann | 9720b4b | 2011-03-02 00:13:05 +0100 | [diff] [blame] | 823 | /* kill threads related to this sdev, if v.c. exists */ |
Tobias Klauser | 8547d4c | 2011-06-24 15:48:47 +0200 | [diff] [blame] | 824 | if (vdev->ud.tcp_rx && !task_is_dead(vdev->ud.tcp_rx)) |
Max Vozeler | d1b2e95 | 2011-04-18 21:44:10 +0200 | [diff] [blame] | 825 | kthread_stop(vdev->ud.tcp_rx); |
Tobias Klauser | 8547d4c | 2011-06-24 15:48:47 +0200 | [diff] [blame] | 826 | if (vdev->ud.tcp_tx && !task_is_dead(vdev->ud.tcp_tx)) |
Max Vozeler | d1b2e95 | 2011-04-18 21:44:10 +0200 | [diff] [blame] | 827 | kthread_stop(vdev->ud.tcp_tx); |
Arnd Bergmann | 9720b4b | 2011-03-02 00:13:05 +0100 | [diff] [blame] | 828 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 829 | pr_info("stop threads\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 830 | |
| 831 | /* active connection is closed */ |
| 832 | if (vdev->ud.tcp_socket != NULL) { |
| 833 | sock_release(vdev->ud.tcp_socket); |
| 834 | vdev->ud.tcp_socket = NULL; |
| 835 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 836 | pr_info("release socket\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 837 | |
| 838 | vhci_device_unlink_cleanup(vdev); |
| 839 | |
| 840 | /* |
| 841 | * rh_port_disconnect() is a trigger of ... |
| 842 | * usb_disable_device(): |
| 843 | * disable all the endpoints for a USB device. |
| 844 | * usb_disable_endpoint(): |
| 845 | * disable endpoints. pending urbs are unlinked(dequeued). |
| 846 | * |
| 847 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a |
| 848 | * deteched device should release used urbs in a cleanup function(i.e. |
| 849 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
| 850 | * pushed urbs and their private data in this function. |
| 851 | * |
| 852 | * NOTE: vhci_dequeue() must be considered carefully. When shutdowning |
| 853 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
| 854 | * gives back pushed urbs and frees their private data by request of |
| 855 | * the cleanup function of a USB driver. When unlinking a urb with an |
| 856 | * active connection, vhci_dequeue() does not give back the urb which |
| 857 | * is actually given back by vhci_rx after receiving its return pdu. |
| 858 | * |
| 859 | */ |
| 860 | rh_port_disconnect(vdev->rhport); |
| 861 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 862 | pr_info("disconnect device\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 863 | } |
| 864 | |
| 865 | |
| 866 | static void vhci_device_reset(struct usbip_device *ud) |
| 867 | { |
| 868 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
| 869 | |
| 870 | spin_lock(&ud->lock); |
| 871 | |
| 872 | vdev->speed = 0; |
| 873 | vdev->devid = 0; |
| 874 | |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 875 | if (vdev->udev) |
| 876 | usb_put_dev(vdev->udev); |
| 877 | vdev->udev = NULL; |
| 878 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 879 | ud->tcp_socket = NULL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 880 | ud->status = VDEV_ST_NULL; |
| 881 | |
| 882 | spin_unlock(&ud->lock); |
| 883 | } |
| 884 | |
| 885 | static void vhci_device_unusable(struct usbip_device *ud) |
| 886 | { |
| 887 | spin_lock(&ud->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 888 | ud->status = VDEV_ST_ERROR; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 889 | spin_unlock(&ud->lock); |
| 890 | } |
| 891 | |
| 892 | static void vhci_device_init(struct vhci_device *vdev) |
| 893 | { |
| 894 | memset(vdev, 0, sizeof(*vdev)); |
| 895 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 896 | vdev->ud.side = USBIP_VHCI; |
| 897 | vdev->ud.status = VDEV_ST_NULL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 898 | spin_lock_init(&vdev->ud.lock); |
| 899 | |
| 900 | INIT_LIST_HEAD(&vdev->priv_rx); |
| 901 | INIT_LIST_HEAD(&vdev->priv_tx); |
| 902 | INIT_LIST_HEAD(&vdev->unlink_tx); |
| 903 | INIT_LIST_HEAD(&vdev->unlink_rx); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 904 | spin_lock_init(&vdev->priv_lock); |
| 905 | |
| 906 | init_waitqueue_head(&vdev->waitq_tx); |
| 907 | |
| 908 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; |
| 909 | vdev->ud.eh_ops.reset = vhci_device_reset; |
| 910 | vdev->ud.eh_ops.unusable = vhci_device_unusable; |
| 911 | |
| 912 | usbip_start_eh(&vdev->ud); |
| 913 | } |
| 914 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 915 | static int vhci_start(struct usb_hcd *hcd) |
| 916 | { |
| 917 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 918 | int rhport; |
| 919 | int err = 0; |
| 920 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 921 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 922 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 923 | /* initialize private data of usb_hcd */ |
| 924 | |
| 925 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
| 926 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
| 927 | vhci_device_init(vdev); |
| 928 | vdev->rhport = rhport; |
| 929 | } |
| 930 | |
| 931 | atomic_set(&vhci->seqnum, 0); |
| 932 | spin_lock_init(&vhci->lock); |
| 933 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 934 | hcd->power_budget = 0; /* no limit */ |
| 935 | hcd->state = HC_STATE_RUNNING; |
| 936 | hcd->uses_new_polling = 1; |
| 937 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 938 | /* vhci_hcd is now ready to be controlled through sysfs */ |
| 939 | err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); |
| 940 | if (err) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 941 | pr_err("create sysfs files\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 942 | return err; |
| 943 | } |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | static void vhci_stop(struct usb_hcd *hcd) |
| 949 | { |
| 950 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 951 | int rhport = 0; |
| 952 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 953 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 954 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 955 | /* 1. remove the userland interface of vhci_hcd */ |
| 956 | sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); |
| 957 | |
| 958 | /* 2. shutdown all the ports of vhci_hcd */ |
| 959 | for (rhport = 0 ; rhport < VHCI_NPORTS; rhport++) { |
| 960 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
| 961 | |
| 962 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); |
| 963 | usbip_stop_eh(&vdev->ud); |
| 964 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 965 | } |
| 966 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 967 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
| 968 | { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 969 | pr_err("Not yet implemented\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 970 | return 0; |
| 971 | } |
| 972 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 973 | #ifdef CONFIG_PM |
| 974 | |
| 975 | /* FIXME: suspend/resume */ |
| 976 | static int vhci_bus_suspend(struct usb_hcd *hcd) |
| 977 | { |
| 978 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 979 | |
| 980 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 981 | |
| 982 | spin_lock_irq(&vhci->lock); |
| 983 | /* vhci->rh_state = DUMMY_RH_SUSPENDED; |
| 984 | * set_link_state(vhci); */ |
| 985 | hcd->state = HC_STATE_SUSPENDED; |
| 986 | spin_unlock_irq(&vhci->lock); |
| 987 | |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | static int vhci_bus_resume(struct usb_hcd *hcd) |
| 992 | { |
| 993 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 994 | int rc = 0; |
| 995 | |
| 996 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 997 | |
| 998 | spin_lock_irq(&vhci->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 999 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1000 | rc = -ESHUTDOWN; |
| 1001 | } else { |
| 1002 | /* vhci->rh_state = DUMMY_RH_RUNNING; |
| 1003 | * set_link_state(vhci); |
| 1004 | * if (!list_empty(&vhci->urbp_list)) |
| 1005 | * mod_timer(&vhci->timer, jiffies); */ |
| 1006 | hcd->state = HC_STATE_RUNNING; |
| 1007 | } |
| 1008 | spin_unlock_irq(&vhci->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1009 | |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 1010 | return rc; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1011 | } |
| 1012 | |
| 1013 | #else |
| 1014 | |
| 1015 | #define vhci_bus_suspend NULL |
| 1016 | #define vhci_bus_resume NULL |
| 1017 | #endif |
| 1018 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1019 | static struct hc_driver vhci_hc_driver = { |
| 1020 | .description = driver_name, |
| 1021 | .product_desc = driver_desc, |
| 1022 | .hcd_priv_size = sizeof(struct vhci_hcd), |
| 1023 | |
| 1024 | .flags = HCD_USB2, |
| 1025 | |
| 1026 | .start = vhci_start, |
Ruslan Pisarev | 0051268 | 2010-03-15 17:06:44 +0200 | [diff] [blame] | 1027 | .stop = vhci_stop, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1028 | |
| 1029 | .urb_enqueue = vhci_urb_enqueue, |
| 1030 | .urb_dequeue = vhci_urb_dequeue, |
| 1031 | |
| 1032 | .get_frame_number = vhci_get_frame_number, |
| 1033 | |
| 1034 | .hub_status_data = vhci_hub_status, |
| 1035 | .hub_control = vhci_hub_control, |
| 1036 | .bus_suspend = vhci_bus_suspend, |
| 1037 | .bus_resume = vhci_bus_resume, |
| 1038 | }; |
| 1039 | |
| 1040 | static int vhci_hcd_probe(struct platform_device *pdev) |
| 1041 | { |
| 1042 | struct usb_hcd *hcd; |
| 1043 | int ret; |
| 1044 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1045 | usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1046 | |
| 1047 | /* will be removed */ |
| 1048 | if (pdev->dev.dma_mask) { |
| 1049 | dev_info(&pdev->dev, "vhci_hcd DMA not supported\n"); |
| 1050 | return -EINVAL; |
| 1051 | } |
| 1052 | |
| 1053 | /* |
| 1054 | * Allocate and initialize hcd. |
| 1055 | * Our private data is also allocated automatically. |
| 1056 | */ |
Kay Sievers | e913397 | 2008-10-30 01:59:32 +0100 | [diff] [blame] | 1057 | hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1058 | if (!hcd) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1059 | pr_err("create hcd failed\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1060 | return -ENOMEM; |
| 1061 | } |
Alan Stern | cee6a26 | 2011-05-02 14:21:44 -0400 | [diff] [blame] | 1062 | hcd->has_tt = 1; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1063 | |
| 1064 | /* this is private data for vhci_hcd */ |
| 1065 | the_controller = hcd_to_vhci(hcd); |
| 1066 | |
| 1067 | /* |
| 1068 | * Finish generic HCD structure initialization and register. |
| 1069 | * Call the driver's reset() and start() routines. |
| 1070 | */ |
| 1071 | ret = usb_add_hcd(hcd, 0, 0); |
| 1072 | if (ret != 0) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1073 | pr_err("usb_add_hcd failed %d\n", ret); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1074 | usb_put_hcd(hcd); |
| 1075 | the_controller = NULL; |
| 1076 | return ret; |
| 1077 | } |
| 1078 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1079 | usbip_dbg_vhci_hc("bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1080 | return 0; |
| 1081 | } |
| 1082 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1083 | static int vhci_hcd_remove(struct platform_device *pdev) |
| 1084 | { |
| 1085 | struct usb_hcd *hcd; |
| 1086 | |
| 1087 | hcd = platform_get_drvdata(pdev); |
| 1088 | if (!hcd) |
| 1089 | return 0; |
| 1090 | |
| 1091 | /* |
| 1092 | * Disconnects the root hub, |
| 1093 | * then reverses the effects of usb_add_hcd(), |
| 1094 | * invoking the HCD's stop() methods. |
| 1095 | */ |
| 1096 | usb_remove_hcd(hcd); |
| 1097 | usb_put_hcd(hcd); |
| 1098 | the_controller = NULL; |
| 1099 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1100 | return 0; |
| 1101 | } |
| 1102 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1103 | #ifdef CONFIG_PM |
| 1104 | |
| 1105 | /* what should happen for USB/IP under suspend/resume? */ |
| 1106 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
| 1107 | { |
| 1108 | struct usb_hcd *hcd; |
| 1109 | int rhport = 0; |
| 1110 | int connected = 0; |
| 1111 | int ret = 0; |
| 1112 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1113 | hcd = platform_get_drvdata(pdev); |
| 1114 | |
| 1115 | spin_lock(&the_controller->lock); |
| 1116 | |
| 1117 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) |
| 1118 | if (the_controller->port_status[rhport] & |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1119 | USB_PORT_STAT_CONNECTION) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1120 | connected += 1; |
| 1121 | |
| 1122 | spin_unlock(&the_controller->lock); |
| 1123 | |
| 1124 | if (connected > 0) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1125 | dev_info(&pdev->dev, "We have %d active connection%s. Do not " |
| 1126 | "suspend.\n", connected, (connected == 1 ? "" : "s")); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1127 | ret = -EBUSY; |
| 1128 | } else { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1129 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1130 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1131 | } |
| 1132 | |
| 1133 | return ret; |
| 1134 | } |
| 1135 | |
| 1136 | static int vhci_hcd_resume(struct platform_device *pdev) |
| 1137 | { |
| 1138 | struct usb_hcd *hcd; |
| 1139 | |
| 1140 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 1141 | |
| 1142 | hcd = platform_get_drvdata(pdev); |
| 1143 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1144 | usb_hcd_poll_rh_status(hcd); |
| 1145 | |
| 1146 | return 0; |
| 1147 | } |
| 1148 | |
| 1149 | #else |
| 1150 | |
| 1151 | #define vhci_hcd_suspend NULL |
| 1152 | #define vhci_hcd_resume NULL |
| 1153 | |
| 1154 | #endif |
| 1155 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1156 | static struct platform_driver vhci_driver = { |
| 1157 | .probe = vhci_hcd_probe, |
| 1158 | .remove = __devexit_p(vhci_hcd_remove), |
| 1159 | .suspend = vhci_hcd_suspend, |
| 1160 | .resume = vhci_hcd_resume, |
| 1161 | .driver = { |
| 1162 | .name = (char *) driver_name, |
| 1163 | .owner = THIS_MODULE, |
| 1164 | }, |
| 1165 | }; |
| 1166 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1167 | /* |
| 1168 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. |
| 1169 | * We need to add this virtual device as a platform device arbitrarily: |
| 1170 | * 1. platform_device_register() |
| 1171 | */ |
| 1172 | static void the_pdev_release(struct device *dev) |
| 1173 | { |
| 1174 | return; |
| 1175 | } |
| 1176 | |
| 1177 | static struct platform_device the_pdev = { |
| 1178 | /* should be the same name as driver_name */ |
| 1179 | .name = (char *) driver_name, |
| 1180 | .id = -1, |
| 1181 | .dev = { |
| 1182 | /* .driver = &vhci_driver, */ |
| 1183 | .release = the_pdev_release, |
| 1184 | }, |
| 1185 | }; |
| 1186 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1187 | static int __init vhci_hcd_init(void) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1188 | { |
| 1189 | int ret; |
| 1190 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1191 | if (usb_disabled()) |
| 1192 | return -ENODEV; |
| 1193 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1194 | ret = platform_driver_register(&vhci_driver); |
| 1195 | if (ret < 0) |
| 1196 | goto err_driver_register; |
| 1197 | |
| 1198 | ret = platform_device_register(&the_pdev); |
| 1199 | if (ret < 0) |
| 1200 | goto err_platform_device_register; |
| 1201 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1202 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1203 | return ret; |
| 1204 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1205 | err_platform_device_register: |
| 1206 | platform_driver_unregister(&vhci_driver); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1207 | err_driver_register: |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1208 | return ret; |
| 1209 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1210 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1211 | static void __exit vhci_hcd_exit(void) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1212 | { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1213 | platform_device_unregister(&the_pdev); |
| 1214 | platform_driver_unregister(&vhci_driver); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1215 | } |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1216 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1217 | module_init(vhci_hcd_init); |
| 1218 | module_exit(vhci_hcd_exit); |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1219 | |
| 1220 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1221 | MODULE_DESCRIPTION(DRIVER_DESC); |
matt mooney | 4ce0a41 | 2011-05-06 03:47:56 -0700 | [diff] [blame] | 1222 | MODULE_LICENSE("GPL"); |
matt mooney | 6973c6f | 2011-05-11 01:54:14 -0700 | [diff] [blame] | 1223 | MODULE_VERSION(USBIP_VERSION); |