Commit | Line | Data |
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04679b34 TH |
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 | ||
7aaacb43 | 20 | #include <linux/init.h> |
3d0a2a22 | 21 | #include <linux/file.h> |
7aaacb43 | 22 | #include <linux/kernel.h> |
9720b4bc | 23 | #include <linux/kthread.h> |
7aaacb43 | 24 | #include <linux/module.h> |
25 | #include <linux/platform_device.h> | |
26 | #include <linux/slab.h> | |
04679b34 TH |
27 | |
28 | #include "usbip_common.h" | |
29 | #include "vhci.h" | |
30 | ||
04679b34 | 31 | #define DRIVER_AUTHOR "Takahiro Hirofuchi" |
64e62426 | 32 | #define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver" |
04679b34 TH |
33 | |
34 | /* | |
35 | * TODO | |
36 | * - update root hub emulation | |
37 | * - move the emulation code to userland ? | |
38 | * porting to other operating systems | |
39 | * minimize kernel code | |
40 | * - add suspend/resume code | |
41 | * - clean up everything | |
42 | */ | |
43 | ||
04679b34 TH |
44 | /* See usb gadget dummy hcd */ |
45 | ||
04679b34 TH |
46 | static int vhci_hub_status(struct usb_hcd *hcd, char *buff); |
47 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
071d1d47 | 48 | u16 wIndex, char *buff, u16 wLength); |
04679b34 | 49 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
071d1d47 | 50 | gfp_t mem_flags); |
04679b34 TH |
51 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
52 | static int vhci_start(struct usb_hcd *vhci_hcd); | |
53 | static void vhci_stop(struct usb_hcd *hcd); | |
54 | static int vhci_get_frame_number(struct usb_hcd *hcd); | |
55 | ||
56 | static const char driver_name[] = "vhci_hcd"; | |
f5e08ca7 | 57 | static const char driver_desc[] = "USB/IP Virtual Host Controller"; |
04679b34 TH |
58 | |
59 | struct vhci_hcd *the_controller; | |
60 | ||
071d1d47 | 61 | static const char * const bit_desc[] = { |
04679b34 TH |
62 | "CONNECTION", /*0*/ |
63 | "ENABLE", /*1*/ | |
64 | "SUSPEND", /*2*/ | |
65 | "OVER_CURRENT", /*3*/ | |
66 | "RESET", /*4*/ | |
071d1d47 | 67 | "R5", /*5*/ |
68 | "R6", /*6*/ | |
69 | "R7", /*7*/ | |
04679b34 TH |
70 | "POWER", /*8*/ |
71 | "LOWSPEED", /*9*/ | |
72 | "HIGHSPEED", /*10*/ | |
73 | "PORT_TEST", /*11*/ | |
74 | "INDICATOR", /*12*/ | |
071d1d47 | 75 | "R13", /*13*/ |
76 | "R14", /*14*/ | |
77 | "R15", /*15*/ | |
04679b34 TH |
78 | "C_CONNECTION", /*16*/ |
79 | "C_ENABLE", /*17*/ | |
80 | "C_SUSPEND", /*18*/ | |
81 | "C_OVER_CURRENT", /*19*/ | |
82 | "C_RESET", /*20*/ | |
071d1d47 | 83 | "R21", /*21*/ |
84 | "R22", /*22*/ | |
85 | "R23", /*23*/ | |
86 | "R24", /*24*/ | |
87 | "R25", /*25*/ | |
88 | "R26", /*26*/ | |
89 | "R27", /*27*/ | |
90 | "R28", /*28*/ | |
91 | "R29", /*29*/ | |
92 | "R30", /*30*/ | |
93 | "R31", /*31*/ | |
04679b34 TH |
94 | }; |
95 | ||
4a3ca2be | 96 | static void dump_port_status_diff(u32 prev_status, u32 new_status) |
04679b34 TH |
97 | { |
98 | int i = 0; | |
4a3ca2be MN |
99 | u32 bit = 1; |
100 | ||
101 | pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status); | |
102 | while (bit) { | |
103 | u32 prev = prev_status & bit; | |
104 | u32 new = new_status & bit; | |
105 | char change; | |
106 | ||
107 | if (!prev && new) | |
108 | change = '+'; | |
109 | else if (prev && !new) | |
110 | change = '-'; | |
111 | else | |
112 | change = ' '; | |
113 | ||
114 | if (prev || new) | |
115 | pr_debug(" %c%s\n", change, bit_desc[i]); | |
116 | bit <<= 1; | |
117 | i++; | |
04679b34 | 118 | } |
1a4b6f66 | 119 | pr_debug("\n"); |
04679b34 TH |
120 | } |
121 | ||
04679b34 TH |
122 | void rh_port_connect(int rhport, enum usb_device_speed speed) |
123 | { | |
b8868e45 | 124 | usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
04679b34 | 125 | |
50b66b5c | 126 | spin_lock(&the_controller->lock); |
04679b34 TH |
127 | |
128 | the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION | |
129 | | (1 << USB_PORT_FEAT_C_CONNECTION); | |
130 | ||
131 | switch (speed) { | |
132 | case USB_SPEED_HIGH: | |
133 | the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED; | |
134 | break; | |
135 | case USB_SPEED_LOW: | |
136 | the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED; | |
137 | break; | |
138 | default: | |
139 | break; | |
140 | } | |
141 | ||
50b66b5c | 142 | spin_unlock(&the_controller->lock); |
04679b34 TH |
143 | |
144 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); | |
145 | } | |
146 | ||
20960fac | 147 | static void rh_port_disconnect(int rhport) |
04679b34 | 148 | { |
b8868e45 | 149 | usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
04679b34 | 150 | |
50b66b5c | 151 | spin_lock(&the_controller->lock); |
c7f00899 | 152 | |
04679b34 TH |
153 | the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION; |
154 | the_controller->port_status[rhport] |= | |
155 | (1 << USB_PORT_FEAT_C_CONNECTION); | |
156 | ||
50b66b5c | 157 | spin_unlock(&the_controller->lock); |
0c9a32f0 | 158 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
04679b34 TH |
159 | } |
160 | ||
071d1d47 | 161 | #define PORT_C_MASK \ |
162 | ((USB_PORT_STAT_C_CONNECTION \ | |
163 | | USB_PORT_STAT_C_ENABLE \ | |
164 | | USB_PORT_STAT_C_SUSPEND \ | |
165 | | USB_PORT_STAT_C_OVERCURRENT \ | |
04679b34 TH |
166 | | USB_PORT_STAT_C_RESET) << 16) |
167 | ||
168 | /* | |
7489301a BW |
169 | * Returns 0 if the status hasn't changed, or the number of bytes in buf. |
170 | * Ports are 0-indexed from the HCD point of view, | |
171 | * and 1-indexed from the USB core pointer of view. | |
04679b34 TH |
172 | * |
173 | * @buf: a bitmap to show which port status has been changed. | |
7489301a | 174 | * bit 0: reserved |
04679b34 TH |
175 | * bit 1: the status of port 0 has been changed. |
176 | * bit 2: the status of port 1 has been changed. | |
177 | * ... | |
04679b34 TH |
178 | */ |
179 | static int vhci_hub_status(struct usb_hcd *hcd, char *buf) | |
180 | { | |
181 | struct vhci_hcd *vhci; | |
7489301a | 182 | int retval; |
04679b34 TH |
183 | int rhport; |
184 | int changed = 0; | |
185 | ||
7489301a BW |
186 | retval = DIV_ROUND_UP(VHCI_NPORTS + 1, 8); |
187 | memset(buf, 0, retval); | |
04679b34 TH |
188 | |
189 | vhci = hcd_to_vhci(hcd); | |
190 | ||
50b66b5c | 191 | spin_lock(&vhci->lock); |
541c7d43 | 192 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
7489301a | 193 | usbip_dbg_vhci_rh("hw accessible flag not on?\n"); |
04679b34 TH |
194 | goto done; |
195 | } | |
196 | ||
197 | /* check pseudo status register for each port */ | |
198 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
199 | if ((vhci->port_status[rhport] & PORT_C_MASK)) { | |
200 | /* The status of a port has been changed, */ | |
7489301a | 201 | usbip_dbg_vhci_rh("port %d status changed\n", rhport); |
04679b34 | 202 | |
7489301a | 203 | buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8; |
04679b34 TH |
204 | changed = 1; |
205 | } | |
206 | } | |
207 | ||
107f04bb | 208 | if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1)) |
04679b34 TH |
209 | usb_hcd_resume_root_hub(hcd); |
210 | ||
04679b34 | 211 | done: |
50b66b5c | 212 | spin_unlock(&vhci->lock); |
7489301a | 213 | return changed ? retval : 0; |
04679b34 TH |
214 | } |
215 | ||
04679b34 TH |
216 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
217 | { | |
218 | memset(desc, 0, sizeof(*desc)); | |
8f413d80 | 219 | desc->bDescriptorType = USB_DT_HUB; |
04679b34 | 220 | desc->bDescLength = 9; |
1cc9af87 SS |
221 | desc->wHubCharacteristics = __constant_cpu_to_le16( |
222 | HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM); | |
04679b34 | 223 | desc->bNbrPorts = VHCI_NPORTS; |
dbe79bbe JY |
224 | desc->u.hs.DeviceRemovable[0] = 0xff; |
225 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
04679b34 TH |
226 | } |
227 | ||
228 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
229 | u16 wIndex, char *buf, u16 wLength) | |
230 | { | |
231 | struct vhci_hcd *dum; | |
232 | int retval = 0; | |
04679b34 TH |
233 | int rhport; |
234 | ||
235 | u32 prev_port_status[VHCI_NPORTS]; | |
236 | ||
541c7d43 | 237 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 TH |
238 | return -ETIMEDOUT; |
239 | ||
240 | /* | |
241 | * NOTE: | |
242 | * wIndex shows the port number and begins from 1. | |
243 | */ | |
b8868e45 | 244 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
071d1d47 | 245 | wIndex); |
04679b34 | 246 | if (wIndex > VHCI_NPORTS) |
1a4b6f66 | 247 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
248 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
249 | ||
250 | dum = hcd_to_vhci(hcd); | |
251 | ||
50b66b5c | 252 | spin_lock(&dum->lock); |
04679b34 TH |
253 | |
254 | /* store old status and compare now and old later */ | |
b8868e45 | 255 | if (usbip_dbg_flag_vhci_rh) { |
6f480bf9 MN |
256 | memcpy(prev_port_status, dum->port_status, |
257 | sizeof(prev_port_status)); | |
04679b34 TH |
258 | } |
259 | ||
260 | switch (typeReq) { | |
261 | case ClearHubFeature: | |
b8868e45 | 262 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
04679b34 TH |
263 | break; |
264 | case ClearPortFeature: | |
265 | switch (wValue) { | |
266 | case USB_PORT_FEAT_SUSPEND: | |
267 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { | |
268 | /* 20msec signaling */ | |
269 | dum->resuming = 1; | |
270 | dum->re_timeout = | |
271 | jiffies + msecs_to_jiffies(20); | |
272 | } | |
273 | break; | |
274 | case USB_PORT_FEAT_POWER: | |
7923a655 CC |
275 | usbip_dbg_vhci_rh( |
276 | " ClearPortFeature: USB_PORT_FEAT_POWER\n"); | |
04679b34 | 277 | dum->port_status[rhport] = 0; |
04679b34 TH |
278 | dum->resuming = 0; |
279 | break; | |
280 | case USB_PORT_FEAT_C_RESET: | |
7923a655 CC |
281 | usbip_dbg_vhci_rh( |
282 | " ClearPortFeature: USB_PORT_FEAT_C_RESET\n"); | |
04679b34 TH |
283 | switch (dum->vdev[rhport].speed) { |
284 | case USB_SPEED_HIGH: | |
285 | dum->port_status[rhport] |= | |
071d1d47 | 286 | USB_PORT_STAT_HIGH_SPEED; |
04679b34 TH |
287 | break; |
288 | case USB_SPEED_LOW: | |
289 | dum->port_status[rhport] |= | |
071d1d47 | 290 | USB_PORT_STAT_LOW_SPEED; |
04679b34 TH |
291 | break; |
292 | default: | |
293 | break; | |
294 | } | |
295 | default: | |
b8868e45 | 296 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
071d1d47 | 297 | wValue); |
04679b34 | 298 | dum->port_status[rhport] &= ~(1 << wValue); |
49aecefc | 299 | break; |
04679b34 TH |
300 | } |
301 | break; | |
302 | case GetHubDescriptor: | |
b8868e45 | 303 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
04679b34 TH |
304 | hub_descriptor((struct usb_hub_descriptor *) buf); |
305 | break; | |
306 | case GetHubStatus: | |
b8868e45 | 307 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
a06a24d2 | 308 | *(__le32 *) buf = cpu_to_le32(0); |
04679b34 TH |
309 | break; |
310 | case GetPortStatus: | |
b8868e45 | 311 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
04679b34 | 312 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
1a4b6f66 | 313 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
314 | retval = -EPIPE; |
315 | } | |
316 | ||
c7f00899 | 317 | /* we do not care about resume. */ |
04679b34 TH |
318 | |
319 | /* whoever resets or resumes must GetPortStatus to | |
320 | * complete it!! | |
c7f00899 | 321 | */ |
04679b34 | 322 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 323 | dum->port_status[rhport] |= |
87352760 | 324 | (1 << USB_PORT_FEAT_C_SUSPEND); |
04679b34 | 325 | dum->port_status[rhport] &= |
87352760 | 326 | ~(1 << USB_PORT_FEAT_SUSPEND); |
04679b34 TH |
327 | dum->resuming = 0; |
328 | dum->re_timeout = 0; | |
04679b34 TH |
329 | } |
330 | ||
331 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != | |
071d1d47 | 332 | 0 && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 333 | dum->port_status[rhport] |= |
071d1d47 | 334 | (1 << USB_PORT_FEAT_C_RESET); |
04679b34 | 335 | dum->port_status[rhport] &= |
071d1d47 | 336 | ~(1 << USB_PORT_FEAT_RESET); |
04679b34 TH |
337 | dum->re_timeout = 0; |
338 | ||
339 | if (dum->vdev[rhport].ud.status == | |
071d1d47 | 340 | VDEV_ST_NOTASSIGNED) { |
7923a655 CC |
341 | usbip_dbg_vhci_rh( |
342 | " enable rhport %d (status %u)\n", | |
343 | rhport, | |
344 | dum->vdev[rhport].ud.status); | |
04679b34 | 345 | dum->port_status[rhport] |= |
071d1d47 | 346 | USB_PORT_STAT_ENABLE; |
04679b34 | 347 | } |
04679b34 | 348 | } |
d0306a51 | 349 | ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
7923a655 CC |
350 | ((__le16 *) buf)[1] = |
351 | cpu_to_le16(dum->port_status[rhport] >> 16); | |
04679b34 | 352 | |
b8868e45 | 353 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
071d1d47 | 354 | ((u16 *)buf)[1]); |
04679b34 TH |
355 | break; |
356 | case SetHubFeature: | |
b8868e45 | 357 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
04679b34 TH |
358 | retval = -EPIPE; |
359 | break; | |
360 | case SetPortFeature: | |
361 | switch (wValue) { | |
362 | case USB_PORT_FEAT_SUSPEND: | |
7923a655 CC |
363 | usbip_dbg_vhci_rh( |
364 | " SetPortFeature: USB_PORT_FEAT_SUSPEND\n"); | |
04679b34 TH |
365 | break; |
366 | case USB_PORT_FEAT_RESET: | |
7923a655 CC |
367 | usbip_dbg_vhci_rh( |
368 | " SetPortFeature: USB_PORT_FEAT_RESET\n"); | |
04679b34 TH |
369 | /* if it's already running, disconnect first */ |
370 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { | |
371 | dum->port_status[rhport] &= | |
071d1d47 | 372 | ~(USB_PORT_STAT_ENABLE | |
373 | USB_PORT_STAT_LOW_SPEED | | |
374 | USB_PORT_STAT_HIGH_SPEED); | |
04679b34 TH |
375 | /* FIXME test that code path! */ |
376 | } | |
377 | /* 50msec reset signaling */ | |
378 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
379 | ||
380 | /* FALLTHROUGH */ | |
381 | default: | |
b8868e45 | 382 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
071d1d47 | 383 | wValue); |
04679b34 | 384 | dum->port_status[rhport] |= (1 << wValue); |
49aecefc | 385 | break; |
04679b34 TH |
386 | } |
387 | break; | |
388 | ||
389 | default: | |
1a4b6f66 | 390 | pr_err("default: no such request\n"); |
04679b34 TH |
391 | |
392 | /* "protocol stall" on error */ | |
393 | retval = -EPIPE; | |
394 | } | |
395 | ||
b8868e45 | 396 | if (usbip_dbg_flag_vhci_rh) { |
1a4b6f66 | 397 | pr_debug("port %d\n", rhport); |
bfb4ce20 MN |
398 | /* Only dump valid port status */ |
399 | if (rhport >= 0) { | |
4a3ca2be MN |
400 | dump_port_status_diff(prev_port_status[rhport], |
401 | dum->port_status[rhport]); | |
bfb4ce20 | 402 | } |
04679b34 | 403 | } |
b8868e45 | 404 | usbip_dbg_vhci_rh(" bye\n"); |
04679b34 | 405 | |
50b66b5c | 406 | spin_unlock(&dum->lock); |
04679b34 TH |
407 | |
408 | return retval; | |
409 | } | |
410 | ||
04679b34 TH |
411 | static struct vhci_device *get_vdev(struct usb_device *udev) |
412 | { | |
413 | int i; | |
414 | ||
415 | if (!udev) | |
416 | return NULL; | |
417 | ||
418 | for (i = 0; i < VHCI_NPORTS; i++) | |
419 | if (the_controller->vdev[i].udev == udev) | |
420 | return port_to_vdev(i); | |
421 | ||
422 | return NULL; | |
423 | } | |
424 | ||
425 | static void vhci_tx_urb(struct urb *urb) | |
426 | { | |
427 | struct vhci_device *vdev = get_vdev(urb->dev); | |
428 | struct vhci_priv *priv; | |
04679b34 TH |
429 | |
430 | if (!vdev) { | |
1a4b6f66 | 431 | pr_err("could not get virtual device"); |
04679b34 TH |
432 | return; |
433 | } | |
434 | ||
b8868e45 | 435 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
04679b34 | 436 | if (!priv) { |
04679b34 TH |
437 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
438 | return; | |
439 | } | |
440 | ||
78110bb8 JP |
441 | spin_lock(&vdev->priv_lock); |
442 | ||
04679b34 TH |
443 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
444 | if (priv->seqnum == 0xffff) | |
1a4b6f66 | 445 | dev_info(&urb->dev->dev, "seqnum max\n"); |
04679b34 TH |
446 | |
447 | priv->vdev = vdev; | |
448 | priv->urb = urb; | |
449 | ||
450 | urb->hcpriv = (void *) priv; | |
451 | ||
04679b34 TH |
452 | list_add_tail(&priv->list, &vdev->priv_tx); |
453 | ||
454 | wake_up(&vdev->waitq_tx); | |
50b66b5c | 455 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
456 | } |
457 | ||
458 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
459 | gfp_t mem_flags) | |
460 | { | |
461 | struct device *dev = &urb->dev->dev; | |
462 | int ret = 0; | |
6d212153 | 463 | struct vhci_device *vdev; |
04679b34 | 464 | |
b8868e45 | 465 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
071d1d47 | 466 | hcd, urb, mem_flags); |
04679b34 TH |
467 | |
468 | /* patch to usb_sg_init() is in 2.5.60 */ | |
469 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); | |
470 | ||
50b66b5c | 471 | spin_lock(&the_controller->lock); |
04679b34 | 472 | |
04679b34 TH |
473 | if (urb->status != -EINPROGRESS) { |
474 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); | |
50b66b5c | 475 | spin_unlock(&the_controller->lock); |
04679b34 TH |
476 | return urb->status; |
477 | } | |
478 | ||
01446ef5 | 479 | vdev = port_to_vdev(urb->dev->portnum-1); |
6d212153 MV |
480 | |
481 | /* refuse enqueue for dead connection */ | |
482 | spin_lock(&vdev->ud.lock); | |
071d1d47 | 483 | if (vdev->ud.status == VDEV_ST_NULL || |
484 | vdev->ud.status == VDEV_ST_ERROR) { | |
1a4b6f66 | 485 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
6d212153 | 486 | spin_unlock(&vdev->ud.lock); |
50b66b5c | 487 | spin_unlock(&the_controller->lock); |
6d212153 MV |
488 | return -ENODEV; |
489 | } | |
490 | spin_unlock(&vdev->ud.lock); | |
491 | ||
04679b34 TH |
492 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
493 | if (ret) | |
494 | goto no_need_unlink; | |
495 | ||
496 | /* | |
b8868e45 | 497 | * The enumeration process is as follows; |
04679b34 TH |
498 | * |
499 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) | |
500 | * to get max packet length of default pipe | |
501 | * | |
502 | * 2. Set_Address request to DevAddr(0) EndPoint(0) | |
503 | * | |
504 | */ | |
04679b34 TH |
505 | if (usb_pipedevice(urb->pipe) == 0) { |
506 | __u8 type = usb_pipetype(urb->pipe); | |
507 | struct usb_ctrlrequest *ctrlreq = | |
071d1d47 | 508 | (struct usb_ctrlrequest *) urb->setup_packet; |
04679b34 TH |
509 | |
510 | if (type != PIPE_CONTROL || !ctrlreq) { | |
511 | dev_err(dev, "invalid request to devnum 0\n"); | |
a7cd5829 | 512 | ret = -EINVAL; |
04679b34 TH |
513 | goto no_need_xmit; |
514 | } | |
515 | ||
516 | switch (ctrlreq->bRequest) { | |
517 | case USB_REQ_SET_ADDRESS: | |
518 | /* set_address may come when a device is reset */ | |
519 | dev_info(dev, "SetAddress Request (%d) to port %d\n", | |
520 | ctrlreq->wValue, vdev->rhport); | |
521 | ||
03f3df81 | 522 | usb_put_dev(vdev->udev); |
7606ee8a | 523 | vdev->udev = usb_get_dev(urb->dev); |
04679b34 TH |
524 | |
525 | spin_lock(&vdev->ud.lock); | |
526 | vdev->ud.status = VDEV_ST_USED; | |
527 | spin_unlock(&vdev->ud.lock); | |
528 | ||
529 | if (urb->status == -EINPROGRESS) { | |
530 | /* This request is successfully completed. */ | |
531 | /* If not -EINPROGRESS, possibly unlinked. */ | |
532 | urb->status = 0; | |
533 | } | |
534 | ||
535 | goto no_need_xmit; | |
536 | ||
537 | case USB_REQ_GET_DESCRIPTOR: | |
d0306a51 | 538 | if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8)) |
7923a655 CC |
539 | usbip_dbg_vhci_hc( |
540 | "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n"); | |
04679b34 | 541 | |
03f3df81 | 542 | usb_put_dev(vdev->udev); |
7606ee8a | 543 | vdev->udev = usb_get_dev(urb->dev); |
04679b34 TH |
544 | goto out; |
545 | ||
546 | default: | |
547 | /* NOT REACHED */ | |
7923a655 CC |
548 | dev_err(dev, |
549 | "invalid request to devnum 0 bRequest %u, wValue %u\n", | |
550 | ctrlreq->bRequest, | |
04679b34 TH |
551 | ctrlreq->wValue); |
552 | ret = -EINVAL; | |
553 | goto no_need_xmit; | |
554 | } | |
555 | ||
556 | } | |
557 | ||
558 | out: | |
559 | vhci_tx_urb(urb); | |
50b66b5c | 560 | spin_unlock(&the_controller->lock); |
04679b34 TH |
561 | |
562 | return 0; | |
563 | ||
564 | no_need_xmit: | |
565 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
566 | no_need_unlink: | |
50b66b5c | 567 | spin_unlock(&the_controller->lock); |
04679b34 | 568 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); |
a7cd5829 | 569 | return ret; |
04679b34 TH |
570 | } |
571 | ||
572 | /* | |
573 | * vhci_rx gives back the urb after receiving the reply of the urb. If an | |
574 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives | |
575 | * back its urb. For the driver unlinking the urb, the content of the urb is | |
576 | * not important, but the calling to its completion handler is important; the | |
577 | * completion of unlinking is notified by the completion handler. | |
578 | * | |
579 | * | |
580 | * CLIENT SIDE | |
581 | * | |
582 | * - When vhci_hcd receives RET_SUBMIT, | |
583 | * | |
584 | * - case 1a). the urb of the pdu is not unlinking. | |
585 | * - normal case | |
586 | * => just give back the urb | |
587 | * | |
588 | * - case 1b). the urb of the pdu is unlinking. | |
589 | * - usbip.ko will return a reply of the unlinking request. | |
590 | * => give back the urb now and go to case 2b). | |
591 | * | |
592 | * - When vhci_hcd receives RET_UNLINK, | |
593 | * | |
594 | * - case 2a). a submit request is still pending in vhci_hcd. | |
595 | * - urb was really pending in usbip.ko and urb_unlink_urb() was | |
596 | * completed there. | |
597 | * => free a pending submit request | |
598 | * => notify unlink completeness by giving back the urb | |
599 | * | |
600 | * - case 2b). a submit request is *not* pending in vhci_hcd. | |
601 | * - urb was already given back to the core driver. | |
602 | * => do not give back the urb | |
603 | * | |
604 | * | |
605 | * SERVER SIDE | |
606 | * | |
607 | * - When usbip receives CMD_UNLINK, | |
608 | * | |
609 | * - case 3a). the urb of the unlink request is now in submission. | |
610 | * => do usb_unlink_urb(). | |
611 | * => after the unlink is completed, send RET_UNLINK. | |
612 | * | |
613 | * - case 3b). the urb of the unlink request is not in submission. | |
614 | * - may be already completed or never be received | |
615 | * => send RET_UNLINK | |
616 | * | |
617 | */ | |
618 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
619 | { | |
04679b34 TH |
620 | struct vhci_priv *priv; |
621 | struct vhci_device *vdev; | |
622 | ||
1a4b6f66 | 623 | pr_info("dequeue a urb %p\n", urb); |
04679b34 | 624 | |
50b66b5c | 625 | spin_lock(&the_controller->lock); |
04679b34 TH |
626 | |
627 | priv = urb->hcpriv; | |
628 | if (!priv) { | |
629 | /* URB was never linked! or will be soon given back by | |
630 | * vhci_rx. */ | |
50b66b5c | 631 | spin_unlock(&the_controller->lock); |
04679b34 TH |
632 | return 0; |
633 | } | |
634 | ||
635 | { | |
636 | int ret = 0; | |
3eed8c03 | 637 | |
04679b34 TH |
638 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
639 | if (ret) { | |
50b66b5c | 640 | spin_unlock(&the_controller->lock); |
b8868e45 | 641 | return ret; |
04679b34 TH |
642 | } |
643 | } | |
644 | ||
645 | /* send unlink request here? */ | |
646 | vdev = priv->vdev; | |
647 | ||
648 | if (!vdev->ud.tcp_socket) { | |
649 | /* tcp connection is closed */ | |
50b66b5c | 650 | spin_lock(&vdev->priv_lock); |
04679b34 | 651 | |
1a4b6f66 | 652 | pr_info("device %p seems to be disconnected\n", vdev); |
04679b34 TH |
653 | list_del(&priv->list); |
654 | kfree(priv); | |
655 | urb->hcpriv = NULL; | |
656 | ||
50b66b5c | 657 | spin_unlock(&vdev->priv_lock); |
04679b34 | 658 | |
b8868e45 BM |
659 | /* |
660 | * If tcp connection is alive, we have sent CMD_UNLINK. | |
661 | * vhci_rx will receive RET_UNLINK and give back the URB. | |
662 | * Otherwise, we give back it here. | |
663 | */ | |
1a4b6f66 | 664 | pr_info("gives back urb %p\n", urb); |
b8868e45 BM |
665 | |
666 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
667 | ||
50b66b5c | 668 | spin_unlock(&the_controller->lock); |
b8868e45 | 669 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
071d1d47 | 670 | urb->status); |
50b66b5c | 671 | spin_lock(&the_controller->lock); |
b8868e45 | 672 | |
04679b34 TH |
673 | } else { |
674 | /* tcp connection is alive */ | |
04679b34 TH |
675 | struct vhci_unlink *unlink; |
676 | ||
50b66b5c | 677 | spin_lock(&vdev->priv_lock); |
04679b34 TH |
678 | |
679 | /* setup CMD_UNLINK pdu */ | |
680 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); | |
681 | if (!unlink) { | |
50b66b5c HY |
682 | spin_unlock(&vdev->priv_lock); |
683 | spin_unlock(&the_controller->lock); | |
04679b34 TH |
684 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
685 | return -ENOMEM; | |
686 | } | |
687 | ||
688 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); | |
689 | if (unlink->seqnum == 0xffff) | |
1a4b6f66 | 690 | pr_info("seqnum max\n"); |
04679b34 TH |
691 | |
692 | unlink->unlink_seqnum = priv->seqnum; | |
693 | ||
1a4b6f66 | 694 | pr_info("device %p seems to be still connected\n", vdev); |
04679b34 TH |
695 | |
696 | /* send cmd_unlink and try to cancel the pending URB in the | |
697 | * peer */ | |
698 | list_add_tail(&unlink->list, &vdev->unlink_tx); | |
699 | wake_up(&vdev->waitq_tx); | |
700 | ||
50b66b5c | 701 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
702 | } |
703 | ||
50b66b5c | 704 | spin_unlock(&the_controller->lock); |
04679b34 | 705 | |
b8868e45 | 706 | usbip_dbg_vhci_hc("leave\n"); |
04679b34 TH |
707 | return 0; |
708 | } | |
709 | ||
04679b34 TH |
710 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
711 | { | |
712 | struct vhci_unlink *unlink, *tmp; | |
713 | ||
236742de | 714 | spin_lock(&the_controller->lock); |
04679b34 TH |
715 | spin_lock(&vdev->priv_lock); |
716 | ||
717 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { | |
1a4b6f66 | 718 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
04679b34 TH |
719 | list_del(&unlink->list); |
720 | kfree(unlink); | |
721 | } | |
722 | ||
236742de | 723 | while (!list_empty(&vdev->unlink_rx)) { |
b92a5e23 MV |
724 | struct urb *urb; |
725 | ||
236742de BB |
726 | unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink, |
727 | list); | |
728 | ||
b92a5e23 | 729 | /* give back URB of unanswered unlink request */ |
1a4b6f66 | 730 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
b92a5e23 MV |
731 | |
732 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); | |
733 | if (!urb) { | |
1a4b6f66 | 734 | pr_info("the urb (seqnum %lu) was already given back\n", |
735 | unlink->unlink_seqnum); | |
b92a5e23 MV |
736 | list_del(&unlink->list); |
737 | kfree(unlink); | |
738 | continue; | |
739 | } | |
740 | ||
741 | urb->status = -ENODEV; | |
742 | ||
b92a5e23 | 743 | usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); |
236742de BB |
744 | |
745 | list_del(&unlink->list); | |
746 | ||
747 | spin_unlock(&vdev->priv_lock); | |
b92a5e23 MV |
748 | spin_unlock(&the_controller->lock); |
749 | ||
071d1d47 | 750 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
751 | urb->status); | |
b92a5e23 | 752 | |
236742de BB |
753 | spin_lock(&the_controller->lock); |
754 | spin_lock(&vdev->priv_lock); | |
755 | ||
04679b34 TH |
756 | kfree(unlink); |
757 | } | |
758 | ||
759 | spin_unlock(&vdev->priv_lock); | |
236742de | 760 | spin_unlock(&the_controller->lock); |
04679b34 TH |
761 | } |
762 | ||
763 | /* | |
764 | * The important thing is that only one context begins cleanup. | |
765 | * This is why error handling and cleanup become simple. | |
766 | * We do not want to consider race condition as possible. | |
767 | */ | |
768 | static void vhci_shutdown_connection(struct usbip_device *ud) | |
769 | { | |
770 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
771 | ||
772 | /* need this? see stub_dev.c */ | |
773 | if (ud->tcp_socket) { | |
1a4b6f66 | 774 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
04679b34 TH |
775 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
776 | } | |
777 | ||
c7f00899 | 778 | /* kill threads related to this sdev */ |
cbf7d122 | 779 | if (vdev->ud.tcp_rx) { |
ba46ce30 | 780 | kthread_stop_put(vdev->ud.tcp_rx); |
cbf7d122 | 781 | vdev->ud.tcp_rx = NULL; |
782 | } | |
783 | if (vdev->ud.tcp_tx) { | |
ba46ce30 | 784 | kthread_stop_put(vdev->ud.tcp_tx); |
cbf7d122 | 785 | vdev->ud.tcp_tx = NULL; |
786 | } | |
1a4b6f66 | 787 | pr_info("stop threads\n"); |
04679b34 TH |
788 | |
789 | /* active connection is closed */ | |
3d0a2a22 | 790 | if (vdev->ud.tcp_socket) { |
964ea96e | 791 | sockfd_put(vdev->ud.tcp_socket); |
04679b34 TH |
792 | vdev->ud.tcp_socket = NULL; |
793 | } | |
1a4b6f66 | 794 | pr_info("release socket\n"); |
04679b34 TH |
795 | |
796 | vhci_device_unlink_cleanup(vdev); | |
797 | ||
798 | /* | |
799 | * rh_port_disconnect() is a trigger of ... | |
800 | * usb_disable_device(): | |
801 | * disable all the endpoints for a USB device. | |
802 | * usb_disable_endpoint(): | |
803 | * disable endpoints. pending urbs are unlinked(dequeued). | |
804 | * | |
805 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a | |
4ec2601f | 806 | * detached device should release used urbs in a cleanup function (i.e. |
04679b34 TH |
807 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
808 | * pushed urbs and their private data in this function. | |
809 | * | |
4ec2601f | 810 | * NOTE: vhci_dequeue() must be considered carefully. When shutting down |
04679b34 TH |
811 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
812 | * gives back pushed urbs and frees their private data by request of | |
813 | * the cleanup function of a USB driver. When unlinking a urb with an | |
814 | * active connection, vhci_dequeue() does not give back the urb which | |
815 | * is actually given back by vhci_rx after receiving its return pdu. | |
816 | * | |
817 | */ | |
818 | rh_port_disconnect(vdev->rhport); | |
819 | ||
1a4b6f66 | 820 | pr_info("disconnect device\n"); |
04679b34 TH |
821 | } |
822 | ||
823 | ||
824 | static void vhci_device_reset(struct usbip_device *ud) | |
825 | { | |
826 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
827 | ||
828 | spin_lock(&ud->lock); | |
829 | ||
830 | vdev->speed = 0; | |
831 | vdev->devid = 0; | |
832 | ||
03f3df81 | 833 | usb_put_dev(vdev->udev); |
7606ee8a MV |
834 | vdev->udev = NULL; |
835 | ||
3d0a2a22 | 836 | if (ud->tcp_socket) { |
964ea96e | 837 | sockfd_put(ud->tcp_socket); |
3d0a2a22 BB |
838 | ud->tcp_socket = NULL; |
839 | } | |
04679b34 TH |
840 | ud->status = VDEV_ST_NULL; |
841 | ||
842 | spin_unlock(&ud->lock); | |
843 | } | |
844 | ||
845 | static void vhci_device_unusable(struct usbip_device *ud) | |
846 | { | |
847 | spin_lock(&ud->lock); | |
04679b34 | 848 | ud->status = VDEV_ST_ERROR; |
04679b34 TH |
849 | spin_unlock(&ud->lock); |
850 | } | |
851 | ||
852 | static void vhci_device_init(struct vhci_device *vdev) | |
853 | { | |
854 | memset(vdev, 0, sizeof(*vdev)); | |
855 | ||
04679b34 TH |
856 | vdev->ud.side = USBIP_VHCI; |
857 | vdev->ud.status = VDEV_ST_NULL; | |
04679b34 TH |
858 | spin_lock_init(&vdev->ud.lock); |
859 | ||
860 | INIT_LIST_HEAD(&vdev->priv_rx); | |
861 | INIT_LIST_HEAD(&vdev->priv_tx); | |
862 | INIT_LIST_HEAD(&vdev->unlink_tx); | |
863 | INIT_LIST_HEAD(&vdev->unlink_rx); | |
04679b34 TH |
864 | spin_lock_init(&vdev->priv_lock); |
865 | ||
866 | init_waitqueue_head(&vdev->waitq_tx); | |
867 | ||
868 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; | |
869 | vdev->ud.eh_ops.reset = vhci_device_reset; | |
870 | vdev->ud.eh_ops.unusable = vhci_device_unusable; | |
871 | ||
872 | usbip_start_eh(&vdev->ud); | |
873 | } | |
874 | ||
04679b34 TH |
875 | static int vhci_start(struct usb_hcd *hcd) |
876 | { | |
877 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
878 | int rhport; | |
879 | int err = 0; | |
880 | ||
b8868e45 | 881 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
04679b34 | 882 | |
04679b34 TH |
883 | /* initialize private data of usb_hcd */ |
884 | ||
885 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
886 | struct vhci_device *vdev = &vhci->vdev[rhport]; | |
3eed8c03 | 887 | |
04679b34 TH |
888 | vhci_device_init(vdev); |
889 | vdev->rhport = rhport; | |
890 | } | |
891 | ||
892 | atomic_set(&vhci->seqnum, 0); | |
893 | spin_lock_init(&vhci->lock); | |
894 | ||
04679b34 | 895 | hcd->power_budget = 0; /* no limit */ |
04679b34 TH |
896 | hcd->uses_new_polling = 1; |
897 | ||
04679b34 TH |
898 | /* vhci_hcd is now ready to be controlled through sysfs */ |
899 | err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
900 | if (err) { | |
1a4b6f66 | 901 | pr_err("create sysfs files\n"); |
04679b34 TH |
902 | return err; |
903 | } | |
904 | ||
905 | return 0; | |
906 | } | |
907 | ||
908 | static void vhci_stop(struct usb_hcd *hcd) | |
909 | { | |
910 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
911 | int rhport = 0; | |
912 | ||
b8868e45 | 913 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
04679b34 | 914 | |
04679b34 TH |
915 | /* 1. remove the userland interface of vhci_hcd */ |
916 | sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
917 | ||
918 | /* 2. shutdown all the ports of vhci_hcd */ | |
909cc6f9 | 919 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
04679b34 TH |
920 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
921 | ||
922 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); | |
923 | usbip_stop_eh(&vdev->ud); | |
924 | } | |
04679b34 TH |
925 | } |
926 | ||
04679b34 TH |
927 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
928 | { | |
1a4b6f66 | 929 | pr_err("Not yet implemented\n"); |
04679b34 TH |
930 | return 0; |
931 | } | |
932 | ||
04679b34 TH |
933 | #ifdef CONFIG_PM |
934 | ||
935 | /* FIXME: suspend/resume */ | |
936 | static int vhci_bus_suspend(struct usb_hcd *hcd) | |
937 | { | |
938 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
939 | ||
940 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
941 | ||
50b66b5c | 942 | spin_lock(&vhci->lock); |
04679b34 | 943 | hcd->state = HC_STATE_SUSPENDED; |
50b66b5c | 944 | spin_unlock(&vhci->lock); |
04679b34 TH |
945 | |
946 | return 0; | |
947 | } | |
948 | ||
949 | static int vhci_bus_resume(struct usb_hcd *hcd) | |
950 | { | |
951 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
952 | int rc = 0; | |
953 | ||
954 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
955 | ||
50b66b5c | 956 | spin_lock(&vhci->lock); |
c46cb54d | 957 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 | 958 | rc = -ESHUTDOWN; |
c46cb54d | 959 | else |
04679b34 | 960 | hcd->state = HC_STATE_RUNNING; |
50b66b5c | 961 | spin_unlock(&vhci->lock); |
04679b34 | 962 | |
87352760 | 963 | return rc; |
04679b34 TH |
964 | } |
965 | ||
966 | #else | |
967 | ||
968 | #define vhci_bus_suspend NULL | |
969 | #define vhci_bus_resume NULL | |
970 | #endif | |
971 | ||
04679b34 TH |
972 | static struct hc_driver vhci_hc_driver = { |
973 | .description = driver_name, | |
974 | .product_desc = driver_desc, | |
975 | .hcd_priv_size = sizeof(struct vhci_hcd), | |
976 | ||
977 | .flags = HCD_USB2, | |
978 | ||
979 | .start = vhci_start, | |
00512687 | 980 | .stop = vhci_stop, |
04679b34 TH |
981 | |
982 | .urb_enqueue = vhci_urb_enqueue, | |
983 | .urb_dequeue = vhci_urb_dequeue, | |
984 | ||
985 | .get_frame_number = vhci_get_frame_number, | |
986 | ||
987 | .hub_status_data = vhci_hub_status, | |
988 | .hub_control = vhci_hub_control, | |
989 | .bus_suspend = vhci_bus_suspend, | |
990 | .bus_resume = vhci_bus_resume, | |
991 | }; | |
992 | ||
993 | static int vhci_hcd_probe(struct platform_device *pdev) | |
994 | { | |
995 | struct usb_hcd *hcd; | |
996 | int ret; | |
997 | ||
b8868e45 | 998 | usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); |
04679b34 | 999 | |
04679b34 TH |
1000 | /* |
1001 | * Allocate and initialize hcd. | |
1002 | * Our private data is also allocated automatically. | |
1003 | */ | |
e9133972 | 1004 | hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
04679b34 | 1005 | if (!hcd) { |
1a4b6f66 | 1006 | pr_err("create hcd failed\n"); |
04679b34 TH |
1007 | return -ENOMEM; |
1008 | } | |
cee6a262 | 1009 | hcd->has_tt = 1; |
04679b34 TH |
1010 | |
1011 | /* this is private data for vhci_hcd */ | |
1012 | the_controller = hcd_to_vhci(hcd); | |
1013 | ||
1014 | /* | |
1015 | * Finish generic HCD structure initialization and register. | |
1016 | * Call the driver's reset() and start() routines. | |
1017 | */ | |
1018 | ret = usb_add_hcd(hcd, 0, 0); | |
1019 | if (ret != 0) { | |
1a4b6f66 | 1020 | pr_err("usb_add_hcd failed %d\n", ret); |
04679b34 TH |
1021 | usb_put_hcd(hcd); |
1022 | the_controller = NULL; | |
1023 | return ret; | |
1024 | } | |
1025 | ||
b8868e45 | 1026 | usbip_dbg_vhci_hc("bye\n"); |
04679b34 TH |
1027 | return 0; |
1028 | } | |
1029 | ||
04679b34 TH |
1030 | static int vhci_hcd_remove(struct platform_device *pdev) |
1031 | { | |
1032 | struct usb_hcd *hcd; | |
1033 | ||
1034 | hcd = platform_get_drvdata(pdev); | |
1035 | if (!hcd) | |
1036 | return 0; | |
1037 | ||
1038 | /* | |
1039 | * Disconnects the root hub, | |
1040 | * then reverses the effects of usb_add_hcd(), | |
1041 | * invoking the HCD's stop() methods. | |
1042 | */ | |
1043 | usb_remove_hcd(hcd); | |
1044 | usb_put_hcd(hcd); | |
1045 | the_controller = NULL; | |
1046 | ||
04679b34 TH |
1047 | return 0; |
1048 | } | |
1049 | ||
04679b34 TH |
1050 | #ifdef CONFIG_PM |
1051 | ||
1052 | /* what should happen for USB/IP under suspend/resume? */ | |
1053 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) | |
1054 | { | |
1055 | struct usb_hcd *hcd; | |
1056 | int rhport = 0; | |
1057 | int connected = 0; | |
1058 | int ret = 0; | |
1059 | ||
04679b34 TH |
1060 | hcd = platform_get_drvdata(pdev); |
1061 | ||
1062 | spin_lock(&the_controller->lock); | |
1063 | ||
1064 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) | |
1065 | if (the_controller->port_status[rhport] & | |
071d1d47 | 1066 | USB_PORT_STAT_CONNECTION) |
04679b34 TH |
1067 | connected += 1; |
1068 | ||
1069 | spin_unlock(&the_controller->lock); | |
1070 | ||
1071 | if (connected > 0) { | |
7923a655 CC |
1072 | dev_info(&pdev->dev, |
1073 | "We have %d active connection%s. Do not suspend.\n", | |
1074 | connected, (connected == 1 ? "" : "s")); | |
04679b34 TH |
1075 | ret = -EBUSY; |
1076 | } else { | |
1a4b6f66 | 1077 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
04679b34 TH |
1078 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
1079 | } | |
1080 | ||
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | static int vhci_hcd_resume(struct platform_device *pdev) | |
1085 | { | |
1086 | struct usb_hcd *hcd; | |
1087 | ||
1088 | dev_dbg(&pdev->dev, "%s\n", __func__); | |
1089 | ||
1090 | hcd = platform_get_drvdata(pdev); | |
1091 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1092 | usb_hcd_poll_rh_status(hcd); | |
1093 | ||
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | #else | |
1098 | ||
1099 | #define vhci_hcd_suspend NULL | |
1100 | #define vhci_hcd_resume NULL | |
1101 | ||
1102 | #endif | |
1103 | ||
04679b34 TH |
1104 | static struct platform_driver vhci_driver = { |
1105 | .probe = vhci_hcd_probe, | |
f307da94 | 1106 | .remove = vhci_hcd_remove, |
04679b34 TH |
1107 | .suspend = vhci_hcd_suspend, |
1108 | .resume = vhci_hcd_resume, | |
1109 | .driver = { | |
1c126bc6 | 1110 | .name = driver_name, |
04679b34 TH |
1111 | }, |
1112 | }; | |
1113 | ||
04679b34 TH |
1114 | /* |
1115 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. | |
1116 | * We need to add this virtual device as a platform device arbitrarily: | |
1117 | * 1. platform_device_register() | |
1118 | */ | |
1119 | static void the_pdev_release(struct device *dev) | |
1120 | { | |
04679b34 TH |
1121 | } |
1122 | ||
1123 | static struct platform_device the_pdev = { | |
1124 | /* should be the same name as driver_name */ | |
6fafecb9 | 1125 | .name = driver_name, |
04679b34 TH |
1126 | .id = -1, |
1127 | .dev = { | |
04679b34 TH |
1128 | .release = the_pdev_release, |
1129 | }, | |
1130 | }; | |
1131 | ||
0392bbb6 | 1132 | static int __init vhci_hcd_init(void) |
04679b34 TH |
1133 | { |
1134 | int ret; | |
1135 | ||
04679b34 TH |
1136 | if (usb_disabled()) |
1137 | return -ENODEV; | |
1138 | ||
04679b34 | 1139 | ret = platform_driver_register(&vhci_driver); |
4d421950 | 1140 | if (ret) |
04679b34 TH |
1141 | goto err_driver_register; |
1142 | ||
1143 | ret = platform_device_register(&the_pdev); | |
4d421950 | 1144 | if (ret) |
04679b34 TH |
1145 | goto err_platform_device_register; |
1146 | ||
1a4b6f66 | 1147 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
04679b34 TH |
1148 | return ret; |
1149 | ||
04679b34 TH |
1150 | err_platform_device_register: |
1151 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1152 | err_driver_register: |
04679b34 TH |
1153 | return ret; |
1154 | } | |
04679b34 | 1155 | |
0392bbb6 | 1156 | static void __exit vhci_hcd_exit(void) |
04679b34 | 1157 | { |
04679b34 TH |
1158 | platform_device_unregister(&the_pdev); |
1159 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1160 | } |
071d1d47 | 1161 | |
0392bbb6 | 1162 | module_init(vhci_hcd_init); |
1163 | module_exit(vhci_hcd_exit); | |
071d1d47 | 1164 | |
1165 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1166 | MODULE_DESCRIPTION(DRIVER_DESC); | |
4ce0a41f | 1167 | MODULE_LICENSE("GPL"); |
6973c6f2 | 1168 | MODULE_VERSION(USBIP_VERSION); |