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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)); | |
219 | desc->bDescriptorType = 0x29; | |
220 | desc->bDescLength = 9; | |
d0306a51 | 221 | desc->wHubCharacteristics = (__constant_cpu_to_le16(0x0001)); |
04679b34 | 222 | desc->bNbrPorts = VHCI_NPORTS; |
dbe79bbe JY |
223 | desc->u.hs.DeviceRemovable[0] = 0xff; |
224 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
04679b34 TH |
225 | } |
226 | ||
227 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
228 | u16 wIndex, char *buf, u16 wLength) | |
229 | { | |
230 | struct vhci_hcd *dum; | |
231 | int retval = 0; | |
04679b34 TH |
232 | int rhport; |
233 | ||
234 | u32 prev_port_status[VHCI_NPORTS]; | |
235 | ||
541c7d43 | 236 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 TH |
237 | return -ETIMEDOUT; |
238 | ||
239 | /* | |
240 | * NOTE: | |
241 | * wIndex shows the port number and begins from 1. | |
242 | */ | |
b8868e45 | 243 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
071d1d47 | 244 | wIndex); |
04679b34 | 245 | if (wIndex > VHCI_NPORTS) |
1a4b6f66 | 246 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
247 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
248 | ||
249 | dum = hcd_to_vhci(hcd); | |
250 | ||
50b66b5c | 251 | spin_lock(&dum->lock); |
04679b34 TH |
252 | |
253 | /* store old status and compare now and old later */ | |
b8868e45 | 254 | if (usbip_dbg_flag_vhci_rh) { |
6f480bf9 MN |
255 | memcpy(prev_port_status, dum->port_status, |
256 | sizeof(prev_port_status)); | |
04679b34 TH |
257 | } |
258 | ||
259 | switch (typeReq) { | |
260 | case ClearHubFeature: | |
b8868e45 | 261 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
04679b34 TH |
262 | break; |
263 | case ClearPortFeature: | |
264 | switch (wValue) { | |
265 | case USB_PORT_FEAT_SUSPEND: | |
266 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { | |
267 | /* 20msec signaling */ | |
268 | dum->resuming = 1; | |
269 | dum->re_timeout = | |
270 | jiffies + msecs_to_jiffies(20); | |
271 | } | |
272 | break; | |
273 | case USB_PORT_FEAT_POWER: | |
7923a655 CC |
274 | usbip_dbg_vhci_rh( |
275 | " ClearPortFeature: USB_PORT_FEAT_POWER\n"); | |
04679b34 | 276 | dum->port_status[rhport] = 0; |
04679b34 TH |
277 | dum->resuming = 0; |
278 | break; | |
279 | case USB_PORT_FEAT_C_RESET: | |
7923a655 CC |
280 | usbip_dbg_vhci_rh( |
281 | " ClearPortFeature: USB_PORT_FEAT_C_RESET\n"); | |
04679b34 TH |
282 | switch (dum->vdev[rhport].speed) { |
283 | case USB_SPEED_HIGH: | |
284 | dum->port_status[rhport] |= | |
071d1d47 | 285 | USB_PORT_STAT_HIGH_SPEED; |
04679b34 TH |
286 | break; |
287 | case USB_SPEED_LOW: | |
288 | dum->port_status[rhport] |= | |
071d1d47 | 289 | USB_PORT_STAT_LOW_SPEED; |
04679b34 TH |
290 | break; |
291 | default: | |
292 | break; | |
293 | } | |
294 | default: | |
b8868e45 | 295 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
071d1d47 | 296 | wValue); |
04679b34 | 297 | dum->port_status[rhport] &= ~(1 << wValue); |
49aecefc | 298 | break; |
04679b34 TH |
299 | } |
300 | break; | |
301 | case GetHubDescriptor: | |
b8868e45 | 302 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
04679b34 TH |
303 | hub_descriptor((struct usb_hub_descriptor *) buf); |
304 | break; | |
305 | case GetHubStatus: | |
b8868e45 | 306 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
a06a24d2 | 307 | *(__le32 *) buf = cpu_to_le32(0); |
04679b34 TH |
308 | break; |
309 | case GetPortStatus: | |
b8868e45 | 310 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
04679b34 | 311 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
1a4b6f66 | 312 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
313 | retval = -EPIPE; |
314 | } | |
315 | ||
c7f00899 | 316 | /* we do not care about resume. */ |
04679b34 TH |
317 | |
318 | /* whoever resets or resumes must GetPortStatus to | |
319 | * complete it!! | |
c7f00899 | 320 | */ |
04679b34 | 321 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 322 | dum->port_status[rhport] |= |
87352760 | 323 | (1 << USB_PORT_FEAT_C_SUSPEND); |
04679b34 | 324 | dum->port_status[rhport] &= |
87352760 | 325 | ~(1 << USB_PORT_FEAT_SUSPEND); |
04679b34 TH |
326 | dum->resuming = 0; |
327 | dum->re_timeout = 0; | |
04679b34 TH |
328 | } |
329 | ||
330 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != | |
071d1d47 | 331 | 0 && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 332 | dum->port_status[rhport] |= |
071d1d47 | 333 | (1 << USB_PORT_FEAT_C_RESET); |
04679b34 | 334 | dum->port_status[rhport] &= |
071d1d47 | 335 | ~(1 << USB_PORT_FEAT_RESET); |
04679b34 TH |
336 | dum->re_timeout = 0; |
337 | ||
338 | if (dum->vdev[rhport].ud.status == | |
071d1d47 | 339 | VDEV_ST_NOTASSIGNED) { |
7923a655 CC |
340 | usbip_dbg_vhci_rh( |
341 | " enable rhport %d (status %u)\n", | |
342 | rhport, | |
343 | dum->vdev[rhport].ud.status); | |
04679b34 | 344 | dum->port_status[rhport] |= |
071d1d47 | 345 | USB_PORT_STAT_ENABLE; |
04679b34 | 346 | } |
04679b34 | 347 | } |
d0306a51 | 348 | ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
7923a655 CC |
349 | ((__le16 *) buf)[1] = |
350 | cpu_to_le16(dum->port_status[rhport] >> 16); | |
04679b34 | 351 | |
b8868e45 | 352 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
071d1d47 | 353 | ((u16 *)buf)[1]); |
04679b34 TH |
354 | break; |
355 | case SetHubFeature: | |
b8868e45 | 356 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
04679b34 TH |
357 | retval = -EPIPE; |
358 | break; | |
359 | case SetPortFeature: | |
360 | switch (wValue) { | |
361 | case USB_PORT_FEAT_SUSPEND: | |
7923a655 CC |
362 | usbip_dbg_vhci_rh( |
363 | " SetPortFeature: USB_PORT_FEAT_SUSPEND\n"); | |
04679b34 TH |
364 | break; |
365 | case USB_PORT_FEAT_RESET: | |
7923a655 CC |
366 | usbip_dbg_vhci_rh( |
367 | " SetPortFeature: USB_PORT_FEAT_RESET\n"); | |
04679b34 TH |
368 | /* if it's already running, disconnect first */ |
369 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { | |
370 | dum->port_status[rhport] &= | |
071d1d47 | 371 | ~(USB_PORT_STAT_ENABLE | |
372 | USB_PORT_STAT_LOW_SPEED | | |
373 | USB_PORT_STAT_HIGH_SPEED); | |
04679b34 TH |
374 | /* FIXME test that code path! */ |
375 | } | |
376 | /* 50msec reset signaling */ | |
377 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
378 | ||
379 | /* FALLTHROUGH */ | |
380 | default: | |
b8868e45 | 381 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
071d1d47 | 382 | wValue); |
04679b34 | 383 | dum->port_status[rhport] |= (1 << wValue); |
49aecefc | 384 | break; |
04679b34 TH |
385 | } |
386 | break; | |
387 | ||
388 | default: | |
1a4b6f66 | 389 | pr_err("default: no such request\n"); |
04679b34 TH |
390 | |
391 | /* "protocol stall" on error */ | |
392 | retval = -EPIPE; | |
393 | } | |
394 | ||
b8868e45 | 395 | if (usbip_dbg_flag_vhci_rh) { |
1a4b6f66 | 396 | pr_debug("port %d\n", rhport); |
bfb4ce20 MN |
397 | /* Only dump valid port status */ |
398 | if (rhport >= 0) { | |
4a3ca2be MN |
399 | dump_port_status_diff(prev_port_status[rhport], |
400 | dum->port_status[rhport]); | |
bfb4ce20 | 401 | } |
04679b34 | 402 | } |
b8868e45 | 403 | usbip_dbg_vhci_rh(" bye\n"); |
04679b34 | 404 | |
50b66b5c | 405 | spin_unlock(&dum->lock); |
04679b34 TH |
406 | |
407 | return retval; | |
408 | } | |
409 | ||
04679b34 TH |
410 | static struct vhci_device *get_vdev(struct usb_device *udev) |
411 | { | |
412 | int i; | |
413 | ||
414 | if (!udev) | |
415 | return NULL; | |
416 | ||
417 | for (i = 0; i < VHCI_NPORTS; i++) | |
418 | if (the_controller->vdev[i].udev == udev) | |
419 | return port_to_vdev(i); | |
420 | ||
421 | return NULL; | |
422 | } | |
423 | ||
424 | static void vhci_tx_urb(struct urb *urb) | |
425 | { | |
426 | struct vhci_device *vdev = get_vdev(urb->dev); | |
427 | struct vhci_priv *priv; | |
04679b34 TH |
428 | |
429 | if (!vdev) { | |
1a4b6f66 | 430 | pr_err("could not get virtual device"); |
04679b34 TH |
431 | return; |
432 | } | |
433 | ||
b8868e45 | 434 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
04679b34 | 435 | if (!priv) { |
04679b34 TH |
436 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
437 | return; | |
438 | } | |
439 | ||
78110bb8 JP |
440 | spin_lock(&vdev->priv_lock); |
441 | ||
04679b34 TH |
442 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
443 | if (priv->seqnum == 0xffff) | |
1a4b6f66 | 444 | dev_info(&urb->dev->dev, "seqnum max\n"); |
04679b34 TH |
445 | |
446 | priv->vdev = vdev; | |
447 | priv->urb = urb; | |
448 | ||
449 | urb->hcpriv = (void *) priv; | |
450 | ||
04679b34 TH |
451 | list_add_tail(&priv->list, &vdev->priv_tx); |
452 | ||
453 | wake_up(&vdev->waitq_tx); | |
50b66b5c | 454 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
455 | } |
456 | ||
457 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
458 | gfp_t mem_flags) | |
459 | { | |
460 | struct device *dev = &urb->dev->dev; | |
461 | int ret = 0; | |
6d212153 | 462 | struct vhci_device *vdev; |
04679b34 | 463 | |
b8868e45 | 464 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
071d1d47 | 465 | hcd, urb, mem_flags); |
04679b34 TH |
466 | |
467 | /* patch to usb_sg_init() is in 2.5.60 */ | |
468 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); | |
469 | ||
50b66b5c | 470 | spin_lock(&the_controller->lock); |
04679b34 | 471 | |
04679b34 TH |
472 | if (urb->status != -EINPROGRESS) { |
473 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); | |
50b66b5c | 474 | spin_unlock(&the_controller->lock); |
04679b34 TH |
475 | return urb->status; |
476 | } | |
477 | ||
01446ef5 | 478 | vdev = port_to_vdev(urb->dev->portnum-1); |
6d212153 MV |
479 | |
480 | /* refuse enqueue for dead connection */ | |
481 | spin_lock(&vdev->ud.lock); | |
071d1d47 | 482 | if (vdev->ud.status == VDEV_ST_NULL || |
483 | vdev->ud.status == VDEV_ST_ERROR) { | |
1a4b6f66 | 484 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
6d212153 | 485 | spin_unlock(&vdev->ud.lock); |
50b66b5c | 486 | spin_unlock(&the_controller->lock); |
6d212153 MV |
487 | return -ENODEV; |
488 | } | |
489 | spin_unlock(&vdev->ud.lock); | |
490 | ||
04679b34 TH |
491 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
492 | if (ret) | |
493 | goto no_need_unlink; | |
494 | ||
495 | /* | |
b8868e45 | 496 | * The enumeration process is as follows; |
04679b34 TH |
497 | * |
498 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) | |
499 | * to get max packet length of default pipe | |
500 | * | |
501 | * 2. Set_Address request to DevAddr(0) EndPoint(0) | |
502 | * | |
503 | */ | |
04679b34 TH |
504 | if (usb_pipedevice(urb->pipe) == 0) { |
505 | __u8 type = usb_pipetype(urb->pipe); | |
506 | struct usb_ctrlrequest *ctrlreq = | |
071d1d47 | 507 | (struct usb_ctrlrequest *) urb->setup_packet; |
04679b34 TH |
508 | |
509 | if (type != PIPE_CONTROL || !ctrlreq) { | |
510 | dev_err(dev, "invalid request to devnum 0\n"); | |
a7cd5829 | 511 | ret = -EINVAL; |
04679b34 TH |
512 | goto no_need_xmit; |
513 | } | |
514 | ||
515 | switch (ctrlreq->bRequest) { | |
516 | case USB_REQ_SET_ADDRESS: | |
517 | /* set_address may come when a device is reset */ | |
518 | dev_info(dev, "SetAddress Request (%d) to port %d\n", | |
519 | ctrlreq->wValue, vdev->rhport); | |
520 | ||
7606ee8a MV |
521 | if (vdev->udev) |
522 | usb_put_dev(vdev->udev); | |
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 | |
7606ee8a MV |
542 | if (vdev->udev) |
543 | usb_put_dev(vdev->udev); | |
544 | vdev->udev = usb_get_dev(urb->dev); | |
04679b34 TH |
545 | goto out; |
546 | ||
547 | default: | |
548 | /* NOT REACHED */ | |
7923a655 CC |
549 | dev_err(dev, |
550 | "invalid request to devnum 0 bRequest %u, wValue %u\n", | |
551 | ctrlreq->bRequest, | |
04679b34 TH |
552 | ctrlreq->wValue); |
553 | ret = -EINVAL; | |
554 | goto no_need_xmit; | |
555 | } | |
556 | ||
557 | } | |
558 | ||
559 | out: | |
560 | vhci_tx_urb(urb); | |
50b66b5c | 561 | spin_unlock(&the_controller->lock); |
04679b34 TH |
562 | |
563 | return 0; | |
564 | ||
565 | no_need_xmit: | |
566 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
567 | no_need_unlink: | |
50b66b5c | 568 | spin_unlock(&the_controller->lock); |
04679b34 | 569 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); |
a7cd5829 | 570 | return ret; |
04679b34 TH |
571 | } |
572 | ||
573 | /* | |
574 | * vhci_rx gives back the urb after receiving the reply of the urb. If an | |
575 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives | |
576 | * back its urb. For the driver unlinking the urb, the content of the urb is | |
577 | * not important, but the calling to its completion handler is important; the | |
578 | * completion of unlinking is notified by the completion handler. | |
579 | * | |
580 | * | |
581 | * CLIENT SIDE | |
582 | * | |
583 | * - When vhci_hcd receives RET_SUBMIT, | |
584 | * | |
585 | * - case 1a). the urb of the pdu is not unlinking. | |
586 | * - normal case | |
587 | * => just give back the urb | |
588 | * | |
589 | * - case 1b). the urb of the pdu is unlinking. | |
590 | * - usbip.ko will return a reply of the unlinking request. | |
591 | * => give back the urb now and go to case 2b). | |
592 | * | |
593 | * - When vhci_hcd receives RET_UNLINK, | |
594 | * | |
595 | * - case 2a). a submit request is still pending in vhci_hcd. | |
596 | * - urb was really pending in usbip.ko and urb_unlink_urb() was | |
597 | * completed there. | |
598 | * => free a pending submit request | |
599 | * => notify unlink completeness by giving back the urb | |
600 | * | |
601 | * - case 2b). a submit request is *not* pending in vhci_hcd. | |
602 | * - urb was already given back to the core driver. | |
603 | * => do not give back the urb | |
604 | * | |
605 | * | |
606 | * SERVER SIDE | |
607 | * | |
608 | * - When usbip receives CMD_UNLINK, | |
609 | * | |
610 | * - case 3a). the urb of the unlink request is now in submission. | |
611 | * => do usb_unlink_urb(). | |
612 | * => after the unlink is completed, send RET_UNLINK. | |
613 | * | |
614 | * - case 3b). the urb of the unlink request is not in submission. | |
615 | * - may be already completed or never be received | |
616 | * => send RET_UNLINK | |
617 | * | |
618 | */ | |
619 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
620 | { | |
04679b34 TH |
621 | struct vhci_priv *priv; |
622 | struct vhci_device *vdev; | |
623 | ||
1a4b6f66 | 624 | pr_info("dequeue a urb %p\n", urb); |
04679b34 | 625 | |
50b66b5c | 626 | spin_lock(&the_controller->lock); |
04679b34 TH |
627 | |
628 | priv = urb->hcpriv; | |
629 | if (!priv) { | |
630 | /* URB was never linked! or will be soon given back by | |
631 | * vhci_rx. */ | |
50b66b5c | 632 | spin_unlock(&the_controller->lock); |
04679b34 TH |
633 | return 0; |
634 | } | |
635 | ||
636 | { | |
637 | int ret = 0; | |
3eed8c03 | 638 | |
04679b34 TH |
639 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
640 | if (ret) { | |
50b66b5c | 641 | spin_unlock(&the_controller->lock); |
b8868e45 | 642 | return ret; |
04679b34 TH |
643 | } |
644 | } | |
645 | ||
646 | /* send unlink request here? */ | |
647 | vdev = priv->vdev; | |
648 | ||
649 | if (!vdev->ud.tcp_socket) { | |
650 | /* tcp connection is closed */ | |
50b66b5c | 651 | spin_lock(&vdev->priv_lock); |
04679b34 | 652 | |
1a4b6f66 | 653 | pr_info("device %p seems to be disconnected\n", vdev); |
04679b34 TH |
654 | list_del(&priv->list); |
655 | kfree(priv); | |
656 | urb->hcpriv = NULL; | |
657 | ||
50b66b5c | 658 | spin_unlock(&vdev->priv_lock); |
04679b34 | 659 | |
b8868e45 BM |
660 | /* |
661 | * If tcp connection is alive, we have sent CMD_UNLINK. | |
662 | * vhci_rx will receive RET_UNLINK and give back the URB. | |
663 | * Otherwise, we give back it here. | |
664 | */ | |
1a4b6f66 | 665 | pr_info("gives back urb %p\n", urb); |
b8868e45 BM |
666 | |
667 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
668 | ||
50b66b5c | 669 | spin_unlock(&the_controller->lock); |
b8868e45 | 670 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
071d1d47 | 671 | urb->status); |
50b66b5c | 672 | spin_lock(&the_controller->lock); |
b8868e45 | 673 | |
04679b34 TH |
674 | } else { |
675 | /* tcp connection is alive */ | |
04679b34 TH |
676 | struct vhci_unlink *unlink; |
677 | ||
50b66b5c | 678 | spin_lock(&vdev->priv_lock); |
04679b34 TH |
679 | |
680 | /* setup CMD_UNLINK pdu */ | |
681 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); | |
682 | if (!unlink) { | |
50b66b5c HY |
683 | spin_unlock(&vdev->priv_lock); |
684 | spin_unlock(&the_controller->lock); | |
04679b34 TH |
685 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
686 | return -ENOMEM; | |
687 | } | |
688 | ||
689 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); | |
690 | if (unlink->seqnum == 0xffff) | |
1a4b6f66 | 691 | pr_info("seqnum max\n"); |
04679b34 TH |
692 | |
693 | unlink->unlink_seqnum = priv->seqnum; | |
694 | ||
1a4b6f66 | 695 | pr_info("device %p seems to be still connected\n", vdev); |
04679b34 TH |
696 | |
697 | /* send cmd_unlink and try to cancel the pending URB in the | |
698 | * peer */ | |
699 | list_add_tail(&unlink->list, &vdev->unlink_tx); | |
700 | wake_up(&vdev->waitq_tx); | |
701 | ||
50b66b5c | 702 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
703 | } |
704 | ||
50b66b5c | 705 | spin_unlock(&the_controller->lock); |
04679b34 | 706 | |
b8868e45 | 707 | usbip_dbg_vhci_hc("leave\n"); |
04679b34 TH |
708 | return 0; |
709 | } | |
710 | ||
04679b34 TH |
711 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
712 | { | |
713 | struct vhci_unlink *unlink, *tmp; | |
714 | ||
236742de | 715 | spin_lock(&the_controller->lock); |
04679b34 TH |
716 | spin_lock(&vdev->priv_lock); |
717 | ||
718 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { | |
1a4b6f66 | 719 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
04679b34 TH |
720 | list_del(&unlink->list); |
721 | kfree(unlink); | |
722 | } | |
723 | ||
236742de | 724 | while (!list_empty(&vdev->unlink_rx)) { |
b92a5e23 MV |
725 | struct urb *urb; |
726 | ||
236742de BB |
727 | unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink, |
728 | list); | |
729 | ||
b92a5e23 | 730 | /* give back URB of unanswered unlink request */ |
1a4b6f66 | 731 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
b92a5e23 MV |
732 | |
733 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); | |
734 | if (!urb) { | |
1a4b6f66 | 735 | pr_info("the urb (seqnum %lu) was already given back\n", |
736 | unlink->unlink_seqnum); | |
b92a5e23 MV |
737 | list_del(&unlink->list); |
738 | kfree(unlink); | |
739 | continue; | |
740 | } | |
741 | ||
742 | urb->status = -ENODEV; | |
743 | ||
b92a5e23 | 744 | usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); |
236742de BB |
745 | |
746 | list_del(&unlink->list); | |
747 | ||
748 | spin_unlock(&vdev->priv_lock); | |
b92a5e23 MV |
749 | spin_unlock(&the_controller->lock); |
750 | ||
071d1d47 | 751 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
752 | urb->status); | |
b92a5e23 | 753 | |
236742de BB |
754 | spin_lock(&the_controller->lock); |
755 | spin_lock(&vdev->priv_lock); | |
756 | ||
04679b34 TH |
757 | kfree(unlink); |
758 | } | |
759 | ||
760 | spin_unlock(&vdev->priv_lock); | |
236742de | 761 | spin_unlock(&the_controller->lock); |
04679b34 TH |
762 | } |
763 | ||
764 | /* | |
765 | * The important thing is that only one context begins cleanup. | |
766 | * This is why error handling and cleanup become simple. | |
767 | * We do not want to consider race condition as possible. | |
768 | */ | |
769 | static void vhci_shutdown_connection(struct usbip_device *ud) | |
770 | { | |
771 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
772 | ||
773 | /* need this? see stub_dev.c */ | |
774 | if (ud->tcp_socket) { | |
1a4b6f66 | 775 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
04679b34 TH |
776 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
777 | } | |
778 | ||
c7f00899 | 779 | /* kill threads related to this sdev */ |
cbf7d122 | 780 | if (vdev->ud.tcp_rx) { |
ba46ce30 | 781 | kthread_stop_put(vdev->ud.tcp_rx); |
cbf7d122 | 782 | vdev->ud.tcp_rx = NULL; |
783 | } | |
784 | if (vdev->ud.tcp_tx) { | |
ba46ce30 | 785 | kthread_stop_put(vdev->ud.tcp_tx); |
cbf7d122 | 786 | vdev->ud.tcp_tx = NULL; |
787 | } | |
1a4b6f66 | 788 | pr_info("stop threads\n"); |
04679b34 TH |
789 | |
790 | /* active connection is closed */ | |
3d0a2a22 | 791 | if (vdev->ud.tcp_socket) { |
964ea96e | 792 | sockfd_put(vdev->ud.tcp_socket); |
04679b34 TH |
793 | vdev->ud.tcp_socket = NULL; |
794 | } | |
1a4b6f66 | 795 | pr_info("release socket\n"); |
04679b34 TH |
796 | |
797 | vhci_device_unlink_cleanup(vdev); | |
798 | ||
799 | /* | |
800 | * rh_port_disconnect() is a trigger of ... | |
801 | * usb_disable_device(): | |
802 | * disable all the endpoints for a USB device. | |
803 | * usb_disable_endpoint(): | |
804 | * disable endpoints. pending urbs are unlinked(dequeued). | |
805 | * | |
806 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a | |
4ec2601f | 807 | * detached device should release used urbs in a cleanup function (i.e. |
04679b34 TH |
808 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
809 | * pushed urbs and their private data in this function. | |
810 | * | |
4ec2601f | 811 | * NOTE: vhci_dequeue() must be considered carefully. When shutting down |
04679b34 TH |
812 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
813 | * gives back pushed urbs and frees their private data by request of | |
814 | * the cleanup function of a USB driver. When unlinking a urb with an | |
815 | * active connection, vhci_dequeue() does not give back the urb which | |
816 | * is actually given back by vhci_rx after receiving its return pdu. | |
817 | * | |
818 | */ | |
819 | rh_port_disconnect(vdev->rhport); | |
820 | ||
1a4b6f66 | 821 | pr_info("disconnect device\n"); |
04679b34 TH |
822 | } |
823 | ||
824 | ||
825 | static void vhci_device_reset(struct usbip_device *ud) | |
826 | { | |
827 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
828 | ||
829 | spin_lock(&ud->lock); | |
830 | ||
831 | vdev->speed = 0; | |
832 | vdev->devid = 0; | |
833 | ||
7606ee8a MV |
834 | if (vdev->udev) |
835 | usb_put_dev(vdev->udev); | |
836 | vdev->udev = NULL; | |
837 | ||
3d0a2a22 | 838 | if (ud->tcp_socket) { |
964ea96e | 839 | sockfd_put(ud->tcp_socket); |
3d0a2a22 BB |
840 | ud->tcp_socket = NULL; |
841 | } | |
04679b34 TH |
842 | ud->status = VDEV_ST_NULL; |
843 | ||
844 | spin_unlock(&ud->lock); | |
845 | } | |
846 | ||
847 | static void vhci_device_unusable(struct usbip_device *ud) | |
848 | { | |
849 | spin_lock(&ud->lock); | |
04679b34 | 850 | ud->status = VDEV_ST_ERROR; |
04679b34 TH |
851 | spin_unlock(&ud->lock); |
852 | } | |
853 | ||
854 | static void vhci_device_init(struct vhci_device *vdev) | |
855 | { | |
856 | memset(vdev, 0, sizeof(*vdev)); | |
857 | ||
04679b34 TH |
858 | vdev->ud.side = USBIP_VHCI; |
859 | vdev->ud.status = VDEV_ST_NULL; | |
04679b34 TH |
860 | spin_lock_init(&vdev->ud.lock); |
861 | ||
862 | INIT_LIST_HEAD(&vdev->priv_rx); | |
863 | INIT_LIST_HEAD(&vdev->priv_tx); | |
864 | INIT_LIST_HEAD(&vdev->unlink_tx); | |
865 | INIT_LIST_HEAD(&vdev->unlink_rx); | |
04679b34 TH |
866 | spin_lock_init(&vdev->priv_lock); |
867 | ||
868 | init_waitqueue_head(&vdev->waitq_tx); | |
869 | ||
870 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; | |
871 | vdev->ud.eh_ops.reset = vhci_device_reset; | |
872 | vdev->ud.eh_ops.unusable = vhci_device_unusable; | |
873 | ||
874 | usbip_start_eh(&vdev->ud); | |
875 | } | |
876 | ||
04679b34 TH |
877 | static int vhci_start(struct usb_hcd *hcd) |
878 | { | |
879 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
880 | int rhport; | |
881 | int err = 0; | |
882 | ||
b8868e45 | 883 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
04679b34 | 884 | |
04679b34 TH |
885 | /* initialize private data of usb_hcd */ |
886 | ||
887 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
888 | struct vhci_device *vdev = &vhci->vdev[rhport]; | |
3eed8c03 | 889 | |
04679b34 TH |
890 | vhci_device_init(vdev); |
891 | vdev->rhport = rhport; | |
892 | } | |
893 | ||
894 | atomic_set(&vhci->seqnum, 0); | |
895 | spin_lock_init(&vhci->lock); | |
896 | ||
04679b34 | 897 | hcd->power_budget = 0; /* no limit */ |
04679b34 TH |
898 | hcd->uses_new_polling = 1; |
899 | ||
04679b34 TH |
900 | /* vhci_hcd is now ready to be controlled through sysfs */ |
901 | err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
902 | if (err) { | |
1a4b6f66 | 903 | pr_err("create sysfs files\n"); |
04679b34 TH |
904 | return err; |
905 | } | |
906 | ||
907 | return 0; | |
908 | } | |
909 | ||
910 | static void vhci_stop(struct usb_hcd *hcd) | |
911 | { | |
912 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
913 | int rhport = 0; | |
914 | ||
b8868e45 | 915 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
04679b34 | 916 | |
04679b34 TH |
917 | /* 1. remove the userland interface of vhci_hcd */ |
918 | sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
919 | ||
920 | /* 2. shutdown all the ports of vhci_hcd */ | |
909cc6f9 | 921 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
04679b34 TH |
922 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
923 | ||
924 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); | |
925 | usbip_stop_eh(&vdev->ud); | |
926 | } | |
04679b34 TH |
927 | } |
928 | ||
04679b34 TH |
929 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
930 | { | |
1a4b6f66 | 931 | pr_err("Not yet implemented\n"); |
04679b34 TH |
932 | return 0; |
933 | } | |
934 | ||
04679b34 TH |
935 | #ifdef CONFIG_PM |
936 | ||
937 | /* FIXME: suspend/resume */ | |
938 | static int vhci_bus_suspend(struct usb_hcd *hcd) | |
939 | { | |
940 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
941 | ||
942 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
943 | ||
50b66b5c | 944 | spin_lock(&vhci->lock); |
04679b34 | 945 | hcd->state = HC_STATE_SUSPENDED; |
50b66b5c | 946 | spin_unlock(&vhci->lock); |
04679b34 TH |
947 | |
948 | return 0; | |
949 | } | |
950 | ||
951 | static int vhci_bus_resume(struct usb_hcd *hcd) | |
952 | { | |
953 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
954 | int rc = 0; | |
955 | ||
956 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
957 | ||
50b66b5c | 958 | spin_lock(&vhci->lock); |
c46cb54d | 959 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 | 960 | rc = -ESHUTDOWN; |
c46cb54d | 961 | else |
04679b34 | 962 | hcd->state = HC_STATE_RUNNING; |
50b66b5c | 963 | spin_unlock(&vhci->lock); |
04679b34 | 964 | |
87352760 | 965 | return rc; |
04679b34 TH |
966 | } |
967 | ||
968 | #else | |
969 | ||
970 | #define vhci_bus_suspend NULL | |
971 | #define vhci_bus_resume NULL | |
972 | #endif | |
973 | ||
04679b34 TH |
974 | static struct hc_driver vhci_hc_driver = { |
975 | .description = driver_name, | |
976 | .product_desc = driver_desc, | |
977 | .hcd_priv_size = sizeof(struct vhci_hcd), | |
978 | ||
979 | .flags = HCD_USB2, | |
980 | ||
981 | .start = vhci_start, | |
00512687 | 982 | .stop = vhci_stop, |
04679b34 TH |
983 | |
984 | .urb_enqueue = vhci_urb_enqueue, | |
985 | .urb_dequeue = vhci_urb_dequeue, | |
986 | ||
987 | .get_frame_number = vhci_get_frame_number, | |
988 | ||
989 | .hub_status_data = vhci_hub_status, | |
990 | .hub_control = vhci_hub_control, | |
991 | .bus_suspend = vhci_bus_suspend, | |
992 | .bus_resume = vhci_bus_resume, | |
993 | }; | |
994 | ||
995 | static int vhci_hcd_probe(struct platform_device *pdev) | |
996 | { | |
997 | struct usb_hcd *hcd; | |
998 | int ret; | |
999 | ||
b8868e45 | 1000 | usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); |
04679b34 | 1001 | |
04679b34 TH |
1002 | /* |
1003 | * Allocate and initialize hcd. | |
1004 | * Our private data is also allocated automatically. | |
1005 | */ | |
e9133972 | 1006 | hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
04679b34 | 1007 | if (!hcd) { |
1a4b6f66 | 1008 | pr_err("create hcd failed\n"); |
04679b34 TH |
1009 | return -ENOMEM; |
1010 | } | |
cee6a262 | 1011 | hcd->has_tt = 1; |
04679b34 TH |
1012 | |
1013 | /* this is private data for vhci_hcd */ | |
1014 | the_controller = hcd_to_vhci(hcd); | |
1015 | ||
1016 | /* | |
1017 | * Finish generic HCD structure initialization and register. | |
1018 | * Call the driver's reset() and start() routines. | |
1019 | */ | |
1020 | ret = usb_add_hcd(hcd, 0, 0); | |
1021 | if (ret != 0) { | |
1a4b6f66 | 1022 | pr_err("usb_add_hcd failed %d\n", ret); |
04679b34 TH |
1023 | usb_put_hcd(hcd); |
1024 | the_controller = NULL; | |
1025 | return ret; | |
1026 | } | |
1027 | ||
b8868e45 | 1028 | usbip_dbg_vhci_hc("bye\n"); |
04679b34 TH |
1029 | return 0; |
1030 | } | |
1031 | ||
04679b34 TH |
1032 | static int vhci_hcd_remove(struct platform_device *pdev) |
1033 | { | |
1034 | struct usb_hcd *hcd; | |
1035 | ||
1036 | hcd = platform_get_drvdata(pdev); | |
1037 | if (!hcd) | |
1038 | return 0; | |
1039 | ||
1040 | /* | |
1041 | * Disconnects the root hub, | |
1042 | * then reverses the effects of usb_add_hcd(), | |
1043 | * invoking the HCD's stop() methods. | |
1044 | */ | |
1045 | usb_remove_hcd(hcd); | |
1046 | usb_put_hcd(hcd); | |
1047 | the_controller = NULL; | |
1048 | ||
04679b34 TH |
1049 | return 0; |
1050 | } | |
1051 | ||
04679b34 TH |
1052 | #ifdef CONFIG_PM |
1053 | ||
1054 | /* what should happen for USB/IP under suspend/resume? */ | |
1055 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) | |
1056 | { | |
1057 | struct usb_hcd *hcd; | |
1058 | int rhport = 0; | |
1059 | int connected = 0; | |
1060 | int ret = 0; | |
1061 | ||
04679b34 TH |
1062 | hcd = platform_get_drvdata(pdev); |
1063 | ||
1064 | spin_lock(&the_controller->lock); | |
1065 | ||
1066 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) | |
1067 | if (the_controller->port_status[rhport] & | |
071d1d47 | 1068 | USB_PORT_STAT_CONNECTION) |
04679b34 TH |
1069 | connected += 1; |
1070 | ||
1071 | spin_unlock(&the_controller->lock); | |
1072 | ||
1073 | if (connected > 0) { | |
7923a655 CC |
1074 | dev_info(&pdev->dev, |
1075 | "We have %d active connection%s. Do not suspend.\n", | |
1076 | connected, (connected == 1 ? "" : "s")); | |
04679b34 TH |
1077 | ret = -EBUSY; |
1078 | } else { | |
1a4b6f66 | 1079 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
04679b34 TH |
1080 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
1081 | } | |
1082 | ||
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | static int vhci_hcd_resume(struct platform_device *pdev) | |
1087 | { | |
1088 | struct usb_hcd *hcd; | |
1089 | ||
1090 | dev_dbg(&pdev->dev, "%s\n", __func__); | |
1091 | ||
1092 | hcd = platform_get_drvdata(pdev); | |
1093 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1094 | usb_hcd_poll_rh_status(hcd); | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | #else | |
1100 | ||
1101 | #define vhci_hcd_suspend NULL | |
1102 | #define vhci_hcd_resume NULL | |
1103 | ||
1104 | #endif | |
1105 | ||
04679b34 TH |
1106 | static struct platform_driver vhci_driver = { |
1107 | .probe = vhci_hcd_probe, | |
f307da94 | 1108 | .remove = vhci_hcd_remove, |
04679b34 TH |
1109 | .suspend = vhci_hcd_suspend, |
1110 | .resume = vhci_hcd_resume, | |
1111 | .driver = { | |
1c126bc6 | 1112 | .name = driver_name, |
04679b34 TH |
1113 | .owner = THIS_MODULE, |
1114 | }, | |
1115 | }; | |
1116 | ||
04679b34 TH |
1117 | /* |
1118 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. | |
1119 | * We need to add this virtual device as a platform device arbitrarily: | |
1120 | * 1. platform_device_register() | |
1121 | */ | |
1122 | static void the_pdev_release(struct device *dev) | |
1123 | { | |
04679b34 TH |
1124 | } |
1125 | ||
1126 | static struct platform_device the_pdev = { | |
1127 | /* should be the same name as driver_name */ | |
6fafecb9 | 1128 | .name = driver_name, |
04679b34 TH |
1129 | .id = -1, |
1130 | .dev = { | |
04679b34 TH |
1131 | .release = the_pdev_release, |
1132 | }, | |
1133 | }; | |
1134 | ||
0392bbb6 | 1135 | static int __init vhci_hcd_init(void) |
04679b34 TH |
1136 | { |
1137 | int ret; | |
1138 | ||
04679b34 TH |
1139 | if (usb_disabled()) |
1140 | return -ENODEV; | |
1141 | ||
04679b34 | 1142 | ret = platform_driver_register(&vhci_driver); |
4d421950 | 1143 | if (ret) |
04679b34 TH |
1144 | goto err_driver_register; |
1145 | ||
1146 | ret = platform_device_register(&the_pdev); | |
4d421950 | 1147 | if (ret) |
04679b34 TH |
1148 | goto err_platform_device_register; |
1149 | ||
1a4b6f66 | 1150 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
04679b34 TH |
1151 | return ret; |
1152 | ||
04679b34 TH |
1153 | err_platform_device_register: |
1154 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1155 | err_driver_register: |
04679b34 TH |
1156 | return ret; |
1157 | } | |
04679b34 | 1158 | |
0392bbb6 | 1159 | static void __exit vhci_hcd_exit(void) |
04679b34 | 1160 | { |
04679b34 TH |
1161 | platform_device_unregister(&the_pdev); |
1162 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1163 | } |
071d1d47 | 1164 | |
0392bbb6 | 1165 | module_init(vhci_hcd_init); |
1166 | module_exit(vhci_hcd_exit); | |
071d1d47 | 1167 | |
1168 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1169 | MODULE_DESCRIPTION(DRIVER_DESC); | |
4ce0a41f | 1170 | MODULE_LICENSE("GPL"); |
6973c6f2 | 1171 | MODULE_VERSION(USBIP_VERSION); |