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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 | ||
1a4b6f66 | 208 | pr_info("changed %d\n", changed); |
04679b34 | 209 | |
107f04bb | 210 | if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1)) |
04679b34 TH |
211 | usb_hcd_resume_root_hub(hcd); |
212 | ||
04679b34 | 213 | done: |
50b66b5c | 214 | spin_unlock(&vhci->lock); |
7489301a | 215 | return changed ? retval : 0; |
04679b34 TH |
216 | } |
217 | ||
04679b34 TH |
218 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
219 | { | |
220 | memset(desc, 0, sizeof(*desc)); | |
221 | desc->bDescriptorType = 0x29; | |
222 | desc->bDescLength = 9; | |
223 | desc->wHubCharacteristics = (__force __u16) | |
224 | (__constant_cpu_to_le16(0x0001)); | |
225 | desc->bNbrPorts = VHCI_NPORTS; | |
dbe79bbe JY |
226 | desc->u.hs.DeviceRemovable[0] = 0xff; |
227 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
04679b34 TH |
228 | } |
229 | ||
230 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
231 | u16 wIndex, char *buf, u16 wLength) | |
232 | { | |
233 | struct vhci_hcd *dum; | |
234 | int retval = 0; | |
04679b34 TH |
235 | int rhport; |
236 | ||
237 | u32 prev_port_status[VHCI_NPORTS]; | |
238 | ||
541c7d43 | 239 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 TH |
240 | return -ETIMEDOUT; |
241 | ||
242 | /* | |
243 | * NOTE: | |
244 | * wIndex shows the port number and begins from 1. | |
245 | */ | |
b8868e45 | 246 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
071d1d47 | 247 | wIndex); |
04679b34 | 248 | if (wIndex > VHCI_NPORTS) |
1a4b6f66 | 249 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
250 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
251 | ||
252 | dum = hcd_to_vhci(hcd); | |
253 | ||
50b66b5c | 254 | spin_lock(&dum->lock); |
04679b34 TH |
255 | |
256 | /* store old status and compare now and old later */ | |
b8868e45 | 257 | if (usbip_dbg_flag_vhci_rh) { |
6f480bf9 MN |
258 | memcpy(prev_port_status, dum->port_status, |
259 | sizeof(prev_port_status)); | |
04679b34 TH |
260 | } |
261 | ||
262 | switch (typeReq) { | |
263 | case ClearHubFeature: | |
b8868e45 | 264 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
04679b34 TH |
265 | break; |
266 | case ClearPortFeature: | |
267 | switch (wValue) { | |
268 | case USB_PORT_FEAT_SUSPEND: | |
269 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { | |
270 | /* 20msec signaling */ | |
271 | dum->resuming = 1; | |
272 | dum->re_timeout = | |
273 | jiffies + msecs_to_jiffies(20); | |
274 | } | |
275 | break; | |
276 | case USB_PORT_FEAT_POWER: | |
b8868e45 | 277 | usbip_dbg_vhci_rh(" ClearPortFeature: " |
071d1d47 | 278 | "USB_PORT_FEAT_POWER\n"); |
04679b34 | 279 | dum->port_status[rhport] = 0; |
04679b34 TH |
280 | dum->resuming = 0; |
281 | break; | |
282 | case USB_PORT_FEAT_C_RESET: | |
b8868e45 | 283 | usbip_dbg_vhci_rh(" ClearPortFeature: " |
071d1d47 | 284 | "USB_PORT_FEAT_C_RESET\n"); |
04679b34 TH |
285 | switch (dum->vdev[rhport].speed) { |
286 | case USB_SPEED_HIGH: | |
287 | dum->port_status[rhport] |= | |
071d1d47 | 288 | USB_PORT_STAT_HIGH_SPEED; |
04679b34 TH |
289 | break; |
290 | case USB_SPEED_LOW: | |
291 | dum->port_status[rhport] |= | |
071d1d47 | 292 | USB_PORT_STAT_LOW_SPEED; |
04679b34 TH |
293 | break; |
294 | default: | |
295 | break; | |
296 | } | |
297 | default: | |
b8868e45 | 298 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
071d1d47 | 299 | wValue); |
04679b34 | 300 | dum->port_status[rhport] &= ~(1 << wValue); |
49aecefc | 301 | break; |
04679b34 TH |
302 | } |
303 | break; | |
304 | case GetHubDescriptor: | |
b8868e45 | 305 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
04679b34 TH |
306 | hub_descriptor((struct usb_hub_descriptor *) buf); |
307 | break; | |
308 | case GetHubStatus: | |
b8868e45 | 309 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
04679b34 TH |
310 | *(__le32 *) buf = __constant_cpu_to_le32(0); |
311 | break; | |
312 | case GetPortStatus: | |
b8868e45 | 313 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
04679b34 | 314 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
1a4b6f66 | 315 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
316 | retval = -EPIPE; |
317 | } | |
318 | ||
c7f00899 | 319 | /* we do not care about resume. */ |
04679b34 TH |
320 | |
321 | /* whoever resets or resumes must GetPortStatus to | |
322 | * complete it!! | |
c7f00899 | 323 | */ |
04679b34 | 324 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 325 | dum->port_status[rhport] |= |
87352760 | 326 | (1 << USB_PORT_FEAT_C_SUSPEND); |
04679b34 | 327 | dum->port_status[rhport] &= |
87352760 | 328 | ~(1 << USB_PORT_FEAT_SUSPEND); |
04679b34 TH |
329 | dum->resuming = 0; |
330 | dum->re_timeout = 0; | |
04679b34 TH |
331 | } |
332 | ||
333 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != | |
071d1d47 | 334 | 0 && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 335 | dum->port_status[rhport] |= |
071d1d47 | 336 | (1 << USB_PORT_FEAT_C_RESET); |
04679b34 | 337 | dum->port_status[rhport] &= |
071d1d47 | 338 | ~(1 << USB_PORT_FEAT_RESET); |
04679b34 TH |
339 | dum->re_timeout = 0; |
340 | ||
341 | if (dum->vdev[rhport].ud.status == | |
071d1d47 | 342 | VDEV_ST_NOTASSIGNED) { |
b8868e45 | 343 | usbip_dbg_vhci_rh(" enable rhport %d " |
071d1d47 | 344 | "(status %u)\n", |
345 | rhport, | |
346 | dum->vdev[rhport].ud.status); | |
04679b34 | 347 | dum->port_status[rhport] |= |
071d1d47 | 348 | USB_PORT_STAT_ENABLE; |
04679b34 | 349 | } |
04679b34 TH |
350 | } |
351 | ((u16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); | |
071d1d47 | 352 | ((u16 *) buf)[1] = cpu_to_le16(dum->port_status[rhport] >> 16); |
04679b34 | 353 | |
b8868e45 | 354 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
071d1d47 | 355 | ((u16 *)buf)[1]); |
04679b34 TH |
356 | break; |
357 | case SetHubFeature: | |
b8868e45 | 358 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
04679b34 TH |
359 | retval = -EPIPE; |
360 | break; | |
361 | case SetPortFeature: | |
362 | switch (wValue) { | |
363 | case USB_PORT_FEAT_SUSPEND: | |
b8868e45 | 364 | usbip_dbg_vhci_rh(" SetPortFeature: " |
071d1d47 | 365 | "USB_PORT_FEAT_SUSPEND\n"); |
04679b34 TH |
366 | break; |
367 | case USB_PORT_FEAT_RESET: | |
b8868e45 | 368 | usbip_dbg_vhci_rh(" SetPortFeature: " |
071d1d47 | 369 | "USB_PORT_FEAT_RESET\n"); |
04679b34 TH |
370 | /* if it's already running, disconnect first */ |
371 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { | |
372 | dum->port_status[rhport] &= | |
071d1d47 | 373 | ~(USB_PORT_STAT_ENABLE | |
374 | USB_PORT_STAT_LOW_SPEED | | |
375 | USB_PORT_STAT_HIGH_SPEED); | |
04679b34 TH |
376 | /* FIXME test that code path! */ |
377 | } | |
378 | /* 50msec reset signaling */ | |
379 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
380 | ||
381 | /* FALLTHROUGH */ | |
382 | default: | |
b8868e45 | 383 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
071d1d47 | 384 | wValue); |
04679b34 | 385 | dum->port_status[rhport] |= (1 << wValue); |
49aecefc | 386 | break; |
04679b34 TH |
387 | } |
388 | break; | |
389 | ||
390 | default: | |
1a4b6f66 | 391 | pr_err("default: no such request\n"); |
04679b34 TH |
392 | |
393 | /* "protocol stall" on error */ | |
394 | retval = -EPIPE; | |
395 | } | |
396 | ||
b8868e45 | 397 | if (usbip_dbg_flag_vhci_rh) { |
1a4b6f66 | 398 | pr_debug("port %d\n", rhport); |
bfb4ce20 MN |
399 | /* Only dump valid port status */ |
400 | if (rhport >= 0) { | |
4a3ca2be MN |
401 | dump_port_status_diff(prev_port_status[rhport], |
402 | dum->port_status[rhport]); | |
bfb4ce20 | 403 | } |
04679b34 | 404 | } |
b8868e45 | 405 | usbip_dbg_vhci_rh(" bye\n"); |
04679b34 | 406 | |
50b66b5c | 407 | spin_unlock(&dum->lock); |
04679b34 TH |
408 | |
409 | return retval; | |
410 | } | |
411 | ||
04679b34 TH |
412 | static struct vhci_device *get_vdev(struct usb_device *udev) |
413 | { | |
414 | int i; | |
415 | ||
416 | if (!udev) | |
417 | return NULL; | |
418 | ||
419 | for (i = 0; i < VHCI_NPORTS; i++) | |
420 | if (the_controller->vdev[i].udev == udev) | |
421 | return port_to_vdev(i); | |
422 | ||
423 | return NULL; | |
424 | } | |
425 | ||
426 | static void vhci_tx_urb(struct urb *urb) | |
427 | { | |
428 | struct vhci_device *vdev = get_vdev(urb->dev); | |
429 | struct vhci_priv *priv; | |
04679b34 TH |
430 | |
431 | if (!vdev) { | |
1a4b6f66 | 432 | pr_err("could not get virtual device"); |
04679b34 TH |
433 | return; |
434 | } | |
435 | ||
b8868e45 | 436 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
04679b34 | 437 | if (!priv) { |
04679b34 TH |
438 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
439 | return; | |
440 | } | |
441 | ||
78110bb8 JP |
442 | spin_lock(&vdev->priv_lock); |
443 | ||
04679b34 TH |
444 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
445 | if (priv->seqnum == 0xffff) | |
1a4b6f66 | 446 | dev_info(&urb->dev->dev, "seqnum max\n"); |
04679b34 TH |
447 | |
448 | priv->vdev = vdev; | |
449 | priv->urb = urb; | |
450 | ||
451 | urb->hcpriv = (void *) priv; | |
452 | ||
04679b34 TH |
453 | list_add_tail(&priv->list, &vdev->priv_tx); |
454 | ||
455 | wake_up(&vdev->waitq_tx); | |
50b66b5c | 456 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
457 | } |
458 | ||
459 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
460 | gfp_t mem_flags) | |
461 | { | |
462 | struct device *dev = &urb->dev->dev; | |
463 | int ret = 0; | |
6d212153 | 464 | struct vhci_device *vdev; |
04679b34 | 465 | |
b8868e45 | 466 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
071d1d47 | 467 | hcd, urb, mem_flags); |
04679b34 TH |
468 | |
469 | /* patch to usb_sg_init() is in 2.5.60 */ | |
470 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); | |
471 | ||
50b66b5c | 472 | spin_lock(&the_controller->lock); |
04679b34 | 473 | |
04679b34 TH |
474 | if (urb->status != -EINPROGRESS) { |
475 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); | |
50b66b5c | 476 | spin_unlock(&the_controller->lock); |
04679b34 TH |
477 | return urb->status; |
478 | } | |
479 | ||
01446ef5 | 480 | vdev = port_to_vdev(urb->dev->portnum-1); |
6d212153 MV |
481 | |
482 | /* refuse enqueue for dead connection */ | |
483 | spin_lock(&vdev->ud.lock); | |
071d1d47 | 484 | if (vdev->ud.status == VDEV_ST_NULL || |
485 | vdev->ud.status == VDEV_ST_ERROR) { | |
1a4b6f66 | 486 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
6d212153 | 487 | spin_unlock(&vdev->ud.lock); |
50b66b5c | 488 | spin_unlock(&the_controller->lock); |
6d212153 MV |
489 | return -ENODEV; |
490 | } | |
491 | spin_unlock(&vdev->ud.lock); | |
492 | ||
04679b34 TH |
493 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
494 | if (ret) | |
495 | goto no_need_unlink; | |
496 | ||
497 | /* | |
b8868e45 | 498 | * The enumeration process is as follows; |
04679b34 TH |
499 | * |
500 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) | |
501 | * to get max packet length of default pipe | |
502 | * | |
503 | * 2. Set_Address request to DevAddr(0) EndPoint(0) | |
504 | * | |
505 | */ | |
04679b34 TH |
506 | if (usb_pipedevice(urb->pipe) == 0) { |
507 | __u8 type = usb_pipetype(urb->pipe); | |
508 | struct usb_ctrlrequest *ctrlreq = | |
071d1d47 | 509 | (struct usb_ctrlrequest *) urb->setup_packet; |
04679b34 TH |
510 | |
511 | if (type != PIPE_CONTROL || !ctrlreq) { | |
512 | dev_err(dev, "invalid request to devnum 0\n"); | |
a7cd5829 | 513 | ret = -EINVAL; |
04679b34 TH |
514 | goto no_need_xmit; |
515 | } | |
516 | ||
517 | switch (ctrlreq->bRequest) { | |
518 | case USB_REQ_SET_ADDRESS: | |
519 | /* set_address may come when a device is reset */ | |
520 | dev_info(dev, "SetAddress Request (%d) to port %d\n", | |
521 | ctrlreq->wValue, vdev->rhport); | |
522 | ||
7606ee8a MV |
523 | if (vdev->udev) |
524 | usb_put_dev(vdev->udev); | |
525 | vdev->udev = usb_get_dev(urb->dev); | |
04679b34 TH |
526 | |
527 | spin_lock(&vdev->ud.lock); | |
528 | vdev->ud.status = VDEV_ST_USED; | |
529 | spin_unlock(&vdev->ud.lock); | |
530 | ||
531 | if (urb->status == -EINPROGRESS) { | |
532 | /* This request is successfully completed. */ | |
533 | /* If not -EINPROGRESS, possibly unlinked. */ | |
534 | urb->status = 0; | |
535 | } | |
536 | ||
537 | goto no_need_xmit; | |
538 | ||
539 | case USB_REQ_GET_DESCRIPTOR: | |
540 | if (ctrlreq->wValue == (USB_DT_DEVICE << 8)) | |
b8868e45 | 541 | usbip_dbg_vhci_hc("Not yet?: " |
071d1d47 | 542 | "Get_Descriptor to device 0 " |
543 | "(get max pipe size)\n"); | |
04679b34 | 544 | |
7606ee8a MV |
545 | if (vdev->udev) |
546 | usb_put_dev(vdev->udev); | |
547 | vdev->udev = usb_get_dev(urb->dev); | |
04679b34 TH |
548 | goto out; |
549 | ||
550 | default: | |
551 | /* NOT REACHED */ | |
552 | dev_err(dev, "invalid request to devnum 0 bRequest %u, " | |
553 | "wValue %u\n", ctrlreq->bRequest, | |
554 | ctrlreq->wValue); | |
555 | ret = -EINVAL; | |
556 | goto no_need_xmit; | |
557 | } | |
558 | ||
559 | } | |
560 | ||
561 | out: | |
562 | vhci_tx_urb(urb); | |
50b66b5c | 563 | spin_unlock(&the_controller->lock); |
04679b34 TH |
564 | |
565 | return 0; | |
566 | ||
567 | no_need_xmit: | |
568 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
569 | no_need_unlink: | |
50b66b5c | 570 | spin_unlock(&the_controller->lock); |
04679b34 | 571 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); |
a7cd5829 | 572 | return ret; |
04679b34 TH |
573 | } |
574 | ||
575 | /* | |
576 | * vhci_rx gives back the urb after receiving the reply of the urb. If an | |
577 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives | |
578 | * back its urb. For the driver unlinking the urb, the content of the urb is | |
579 | * not important, but the calling to its completion handler is important; the | |
580 | * completion of unlinking is notified by the completion handler. | |
581 | * | |
582 | * | |
583 | * CLIENT SIDE | |
584 | * | |
585 | * - When vhci_hcd receives RET_SUBMIT, | |
586 | * | |
587 | * - case 1a). the urb of the pdu is not unlinking. | |
588 | * - normal case | |
589 | * => just give back the urb | |
590 | * | |
591 | * - case 1b). the urb of the pdu is unlinking. | |
592 | * - usbip.ko will return a reply of the unlinking request. | |
593 | * => give back the urb now and go to case 2b). | |
594 | * | |
595 | * - When vhci_hcd receives RET_UNLINK, | |
596 | * | |
597 | * - case 2a). a submit request is still pending in vhci_hcd. | |
598 | * - urb was really pending in usbip.ko and urb_unlink_urb() was | |
599 | * completed there. | |
600 | * => free a pending submit request | |
601 | * => notify unlink completeness by giving back the urb | |
602 | * | |
603 | * - case 2b). a submit request is *not* pending in vhci_hcd. | |
604 | * - urb was already given back to the core driver. | |
605 | * => do not give back the urb | |
606 | * | |
607 | * | |
608 | * SERVER SIDE | |
609 | * | |
610 | * - When usbip receives CMD_UNLINK, | |
611 | * | |
612 | * - case 3a). the urb of the unlink request is now in submission. | |
613 | * => do usb_unlink_urb(). | |
614 | * => after the unlink is completed, send RET_UNLINK. | |
615 | * | |
616 | * - case 3b). the urb of the unlink request is not in submission. | |
617 | * - may be already completed or never be received | |
618 | * => send RET_UNLINK | |
619 | * | |
620 | */ | |
621 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
622 | { | |
04679b34 TH |
623 | struct vhci_priv *priv; |
624 | struct vhci_device *vdev; | |
625 | ||
1a4b6f66 | 626 | pr_info("dequeue a urb %p\n", urb); |
04679b34 | 627 | |
50b66b5c | 628 | spin_lock(&the_controller->lock); |
04679b34 TH |
629 | |
630 | priv = urb->hcpriv; | |
631 | if (!priv) { | |
632 | /* URB was never linked! or will be soon given back by | |
633 | * vhci_rx. */ | |
50b66b5c | 634 | spin_unlock(&the_controller->lock); |
04679b34 TH |
635 | return 0; |
636 | } | |
637 | ||
638 | { | |
639 | int ret = 0; | |
640 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
641 | if (ret) { | |
50b66b5c | 642 | spin_unlock(&the_controller->lock); |
b8868e45 | 643 | return ret; |
04679b34 TH |
644 | } |
645 | } | |
646 | ||
647 | /* send unlink request here? */ | |
648 | vdev = priv->vdev; | |
649 | ||
650 | if (!vdev->ud.tcp_socket) { | |
651 | /* tcp connection is closed */ | |
50b66b5c | 652 | spin_lock(&vdev->priv_lock); |
04679b34 | 653 | |
1a4b6f66 | 654 | pr_info("device %p seems to be disconnected\n", vdev); |
04679b34 TH |
655 | list_del(&priv->list); |
656 | kfree(priv); | |
657 | urb->hcpriv = NULL; | |
658 | ||
50b66b5c | 659 | spin_unlock(&vdev->priv_lock); |
04679b34 | 660 | |
b8868e45 BM |
661 | /* |
662 | * If tcp connection is alive, we have sent CMD_UNLINK. | |
663 | * vhci_rx will receive RET_UNLINK and give back the URB. | |
664 | * Otherwise, we give back it here. | |
665 | */ | |
1a4b6f66 | 666 | pr_info("gives back urb %p\n", urb); |
b8868e45 BM |
667 | |
668 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
669 | ||
50b66b5c | 670 | spin_unlock(&the_controller->lock); |
b8868e45 | 671 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
071d1d47 | 672 | urb->status); |
50b66b5c | 673 | spin_lock(&the_controller->lock); |
b8868e45 | 674 | |
04679b34 TH |
675 | } else { |
676 | /* tcp connection is alive */ | |
04679b34 TH |
677 | struct vhci_unlink *unlink; |
678 | ||
50b66b5c | 679 | spin_lock(&vdev->priv_lock); |
04679b34 TH |
680 | |
681 | /* setup CMD_UNLINK pdu */ | |
682 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); | |
683 | if (!unlink) { | |
50b66b5c HY |
684 | spin_unlock(&vdev->priv_lock); |
685 | spin_unlock(&the_controller->lock); | |
04679b34 TH |
686 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
687 | return -ENOMEM; | |
688 | } | |
689 | ||
690 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); | |
691 | if (unlink->seqnum == 0xffff) | |
1a4b6f66 | 692 | pr_info("seqnum max\n"); |
04679b34 TH |
693 | |
694 | unlink->unlink_seqnum = priv->seqnum; | |
695 | ||
1a4b6f66 | 696 | pr_info("device %p seems to be still connected\n", vdev); |
04679b34 TH |
697 | |
698 | /* send cmd_unlink and try to cancel the pending URB in the | |
699 | * peer */ | |
700 | list_add_tail(&unlink->list, &vdev->unlink_tx); | |
701 | wake_up(&vdev->waitq_tx); | |
702 | ||
50b66b5c | 703 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
704 | } |
705 | ||
50b66b5c | 706 | spin_unlock(&the_controller->lock); |
04679b34 | 707 | |
b8868e45 | 708 | usbip_dbg_vhci_hc("leave\n"); |
04679b34 TH |
709 | return 0; |
710 | } | |
711 | ||
04679b34 TH |
712 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
713 | { | |
714 | struct vhci_unlink *unlink, *tmp; | |
715 | ||
236742de | 716 | spin_lock(&the_controller->lock); |
04679b34 TH |
717 | spin_lock(&vdev->priv_lock); |
718 | ||
719 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { | |
1a4b6f66 | 720 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
04679b34 TH |
721 | list_del(&unlink->list); |
722 | kfree(unlink); | |
723 | } | |
724 | ||
236742de | 725 | while (!list_empty(&vdev->unlink_rx)) { |
b92a5e23 MV |
726 | struct urb *urb; |
727 | ||
236742de BB |
728 | unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink, |
729 | list); | |
730 | ||
b92a5e23 | 731 | /* give back URB of unanswered unlink request */ |
1a4b6f66 | 732 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
b92a5e23 MV |
733 | |
734 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); | |
735 | if (!urb) { | |
1a4b6f66 | 736 | pr_info("the urb (seqnum %lu) was already given back\n", |
737 | unlink->unlink_seqnum); | |
b92a5e23 MV |
738 | list_del(&unlink->list); |
739 | kfree(unlink); | |
740 | continue; | |
741 | } | |
742 | ||
743 | urb->status = -ENODEV; | |
744 | ||
b92a5e23 | 745 | usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); |
236742de BB |
746 | |
747 | list_del(&unlink->list); | |
748 | ||
749 | spin_unlock(&vdev->priv_lock); | |
b92a5e23 MV |
750 | spin_unlock(&the_controller->lock); |
751 | ||
071d1d47 | 752 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
753 | urb->status); | |
b92a5e23 | 754 | |
236742de BB |
755 | spin_lock(&the_controller->lock); |
756 | spin_lock(&vdev->priv_lock); | |
757 | ||
04679b34 TH |
758 | kfree(unlink); |
759 | } | |
760 | ||
761 | spin_unlock(&vdev->priv_lock); | |
236742de | 762 | spin_unlock(&the_controller->lock); |
04679b34 TH |
763 | } |
764 | ||
765 | /* | |
766 | * The important thing is that only one context begins cleanup. | |
767 | * This is why error handling and cleanup become simple. | |
768 | * We do not want to consider race condition as possible. | |
769 | */ | |
770 | static void vhci_shutdown_connection(struct usbip_device *ud) | |
771 | { | |
772 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
773 | ||
774 | /* need this? see stub_dev.c */ | |
775 | if (ud->tcp_socket) { | |
1a4b6f66 | 776 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
04679b34 TH |
777 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
778 | } | |
779 | ||
c7f00899 | 780 | /* kill threads related to this sdev */ |
cbf7d122 | 781 | if (vdev->ud.tcp_rx) { |
ba46ce30 | 782 | kthread_stop_put(vdev->ud.tcp_rx); |
cbf7d122 | 783 | vdev->ud.tcp_rx = NULL; |
784 | } | |
785 | if (vdev->ud.tcp_tx) { | |
ba46ce30 | 786 | kthread_stop_put(vdev->ud.tcp_tx); |
cbf7d122 | 787 | vdev->ud.tcp_tx = NULL; |
788 | } | |
1a4b6f66 | 789 | pr_info("stop threads\n"); |
04679b34 TH |
790 | |
791 | /* active connection is closed */ | |
3d0a2a22 BB |
792 | if (vdev->ud.tcp_socket) { |
793 | fput(vdev->ud.tcp_socket->file); | |
04679b34 TH |
794 | vdev->ud.tcp_socket = NULL; |
795 | } | |
1a4b6f66 | 796 | pr_info("release socket\n"); |
04679b34 TH |
797 | |
798 | vhci_device_unlink_cleanup(vdev); | |
799 | ||
800 | /* | |
801 | * rh_port_disconnect() is a trigger of ... | |
802 | * usb_disable_device(): | |
803 | * disable all the endpoints for a USB device. | |
804 | * usb_disable_endpoint(): | |
805 | * disable endpoints. pending urbs are unlinked(dequeued). | |
806 | * | |
807 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a | |
4ec2601f | 808 | * detached device should release used urbs in a cleanup function (i.e. |
04679b34 TH |
809 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
810 | * pushed urbs and their private data in this function. | |
811 | * | |
4ec2601f | 812 | * NOTE: vhci_dequeue() must be considered carefully. When shutting down |
04679b34 TH |
813 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
814 | * gives back pushed urbs and frees their private data by request of | |
815 | * the cleanup function of a USB driver. When unlinking a urb with an | |
816 | * active connection, vhci_dequeue() does not give back the urb which | |
817 | * is actually given back by vhci_rx after receiving its return pdu. | |
818 | * | |
819 | */ | |
820 | rh_port_disconnect(vdev->rhport); | |
821 | ||
1a4b6f66 | 822 | pr_info("disconnect device\n"); |
04679b34 TH |
823 | } |
824 | ||
825 | ||
826 | static void vhci_device_reset(struct usbip_device *ud) | |
827 | { | |
828 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
829 | ||
830 | spin_lock(&ud->lock); | |
831 | ||
832 | vdev->speed = 0; | |
833 | vdev->devid = 0; | |
834 | ||
7606ee8a MV |
835 | if (vdev->udev) |
836 | usb_put_dev(vdev->udev); | |
837 | vdev->udev = NULL; | |
838 | ||
3d0a2a22 BB |
839 | if (ud->tcp_socket) { |
840 | fput(ud->tcp_socket->file); | |
841 | ud->tcp_socket = NULL; | |
842 | } | |
04679b34 TH |
843 | ud->status = VDEV_ST_NULL; |
844 | ||
845 | spin_unlock(&ud->lock); | |
846 | } | |
847 | ||
848 | static void vhci_device_unusable(struct usbip_device *ud) | |
849 | { | |
850 | spin_lock(&ud->lock); | |
04679b34 | 851 | ud->status = VDEV_ST_ERROR; |
04679b34 TH |
852 | spin_unlock(&ud->lock); |
853 | } | |
854 | ||
855 | static void vhci_device_init(struct vhci_device *vdev) | |
856 | { | |
857 | memset(vdev, 0, sizeof(*vdev)); | |
858 | ||
04679b34 TH |
859 | vdev->ud.side = USBIP_VHCI; |
860 | vdev->ud.status = VDEV_ST_NULL; | |
04679b34 TH |
861 | spin_lock_init(&vdev->ud.lock); |
862 | ||
863 | INIT_LIST_HEAD(&vdev->priv_rx); | |
864 | INIT_LIST_HEAD(&vdev->priv_tx); | |
865 | INIT_LIST_HEAD(&vdev->unlink_tx); | |
866 | INIT_LIST_HEAD(&vdev->unlink_rx); | |
04679b34 TH |
867 | spin_lock_init(&vdev->priv_lock); |
868 | ||
869 | init_waitqueue_head(&vdev->waitq_tx); | |
870 | ||
871 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; | |
872 | vdev->ud.eh_ops.reset = vhci_device_reset; | |
873 | vdev->ud.eh_ops.unusable = vhci_device_unusable; | |
874 | ||
875 | usbip_start_eh(&vdev->ud); | |
876 | } | |
877 | ||
04679b34 TH |
878 | static int vhci_start(struct usb_hcd *hcd) |
879 | { | |
880 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
881 | int rhport; | |
882 | int err = 0; | |
883 | ||
b8868e45 | 884 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
04679b34 | 885 | |
04679b34 TH |
886 | /* initialize private data of usb_hcd */ |
887 | ||
888 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
889 | struct vhci_device *vdev = &vhci->vdev[rhport]; | |
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 */ | |
921 | for (rhport = 0 ; rhport < VHCI_NPORTS; rhport++) { | |
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); |
541c7d43 | 959 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
04679b34 TH |
960 | rc = -ESHUTDOWN; |
961 | } else { | |
04679b34 TH |
962 | hcd->state = HC_STATE_RUNNING; |
963 | } | |
50b66b5c | 964 | spin_unlock(&vhci->lock); |
04679b34 | 965 | |
87352760 | 966 | return rc; |
04679b34 TH |
967 | } |
968 | ||
969 | #else | |
970 | ||
971 | #define vhci_bus_suspend NULL | |
972 | #define vhci_bus_resume NULL | |
973 | #endif | |
974 | ||
04679b34 TH |
975 | static struct hc_driver vhci_hc_driver = { |
976 | .description = driver_name, | |
977 | .product_desc = driver_desc, | |
978 | .hcd_priv_size = sizeof(struct vhci_hcd), | |
979 | ||
980 | .flags = HCD_USB2, | |
981 | ||
982 | .start = vhci_start, | |
00512687 | 983 | .stop = vhci_stop, |
04679b34 TH |
984 | |
985 | .urb_enqueue = vhci_urb_enqueue, | |
986 | .urb_dequeue = vhci_urb_dequeue, | |
987 | ||
988 | .get_frame_number = vhci_get_frame_number, | |
989 | ||
990 | .hub_status_data = vhci_hub_status, | |
991 | .hub_control = vhci_hub_control, | |
992 | .bus_suspend = vhci_bus_suspend, | |
993 | .bus_resume = vhci_bus_resume, | |
994 | }; | |
995 | ||
996 | static int vhci_hcd_probe(struct platform_device *pdev) | |
997 | { | |
998 | struct usb_hcd *hcd; | |
999 | int ret; | |
1000 | ||
b8868e45 | 1001 | usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); |
04679b34 TH |
1002 | |
1003 | /* will be removed */ | |
1004 | if (pdev->dev.dma_mask) { | |
1005 | dev_info(&pdev->dev, "vhci_hcd DMA not supported\n"); | |
1006 | return -EINVAL; | |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * Allocate and initialize hcd. | |
1011 | * Our private data is also allocated automatically. | |
1012 | */ | |
e9133972 | 1013 | hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
04679b34 | 1014 | if (!hcd) { |
1a4b6f66 | 1015 | pr_err("create hcd failed\n"); |
04679b34 TH |
1016 | return -ENOMEM; |
1017 | } | |
cee6a262 | 1018 | hcd->has_tt = 1; |
04679b34 TH |
1019 | |
1020 | /* this is private data for vhci_hcd */ | |
1021 | the_controller = hcd_to_vhci(hcd); | |
1022 | ||
1023 | /* | |
1024 | * Finish generic HCD structure initialization and register. | |
1025 | * Call the driver's reset() and start() routines. | |
1026 | */ | |
1027 | ret = usb_add_hcd(hcd, 0, 0); | |
1028 | if (ret != 0) { | |
1a4b6f66 | 1029 | pr_err("usb_add_hcd failed %d\n", ret); |
04679b34 TH |
1030 | usb_put_hcd(hcd); |
1031 | the_controller = NULL; | |
1032 | return ret; | |
1033 | } | |
1034 | ||
b8868e45 | 1035 | usbip_dbg_vhci_hc("bye\n"); |
04679b34 TH |
1036 | return 0; |
1037 | } | |
1038 | ||
04679b34 TH |
1039 | static int vhci_hcd_remove(struct platform_device *pdev) |
1040 | { | |
1041 | struct usb_hcd *hcd; | |
1042 | ||
1043 | hcd = platform_get_drvdata(pdev); | |
1044 | if (!hcd) | |
1045 | return 0; | |
1046 | ||
1047 | /* | |
1048 | * Disconnects the root hub, | |
1049 | * then reverses the effects of usb_add_hcd(), | |
1050 | * invoking the HCD's stop() methods. | |
1051 | */ | |
1052 | usb_remove_hcd(hcd); | |
1053 | usb_put_hcd(hcd); | |
1054 | the_controller = NULL; | |
1055 | ||
04679b34 TH |
1056 | return 0; |
1057 | } | |
1058 | ||
04679b34 TH |
1059 | #ifdef CONFIG_PM |
1060 | ||
1061 | /* what should happen for USB/IP under suspend/resume? */ | |
1062 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) | |
1063 | { | |
1064 | struct usb_hcd *hcd; | |
1065 | int rhport = 0; | |
1066 | int connected = 0; | |
1067 | int ret = 0; | |
1068 | ||
04679b34 TH |
1069 | hcd = platform_get_drvdata(pdev); |
1070 | ||
1071 | spin_lock(&the_controller->lock); | |
1072 | ||
1073 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) | |
1074 | if (the_controller->port_status[rhport] & | |
071d1d47 | 1075 | USB_PORT_STAT_CONNECTION) |
04679b34 TH |
1076 | connected += 1; |
1077 | ||
1078 | spin_unlock(&the_controller->lock); | |
1079 | ||
1080 | if (connected > 0) { | |
1a4b6f66 | 1081 | dev_info(&pdev->dev, "We have %d active connection%s. Do not " |
1082 | "suspend.\n", connected, (connected == 1 ? "" : "s")); | |
04679b34 TH |
1083 | ret = -EBUSY; |
1084 | } else { | |
1a4b6f66 | 1085 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
04679b34 TH |
1086 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
1087 | } | |
1088 | ||
1089 | return ret; | |
1090 | } | |
1091 | ||
1092 | static int vhci_hcd_resume(struct platform_device *pdev) | |
1093 | { | |
1094 | struct usb_hcd *hcd; | |
1095 | ||
1096 | dev_dbg(&pdev->dev, "%s\n", __func__); | |
1097 | ||
1098 | hcd = platform_get_drvdata(pdev); | |
1099 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1100 | usb_hcd_poll_rh_status(hcd); | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | #else | |
1106 | ||
1107 | #define vhci_hcd_suspend NULL | |
1108 | #define vhci_hcd_resume NULL | |
1109 | ||
1110 | #endif | |
1111 | ||
04679b34 TH |
1112 | static struct platform_driver vhci_driver = { |
1113 | .probe = vhci_hcd_probe, | |
f307da94 | 1114 | .remove = vhci_hcd_remove, |
04679b34 TH |
1115 | .suspend = vhci_hcd_suspend, |
1116 | .resume = vhci_hcd_resume, | |
1117 | .driver = { | |
1118 | .name = (char *) driver_name, | |
1119 | .owner = THIS_MODULE, | |
1120 | }, | |
1121 | }; | |
1122 | ||
04679b34 TH |
1123 | /* |
1124 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. | |
1125 | * We need to add this virtual device as a platform device arbitrarily: | |
1126 | * 1. platform_device_register() | |
1127 | */ | |
1128 | static void the_pdev_release(struct device *dev) | |
1129 | { | |
1130 | return; | |
1131 | } | |
1132 | ||
1133 | static struct platform_device the_pdev = { | |
1134 | /* should be the same name as driver_name */ | |
1135 | .name = (char *) driver_name, | |
1136 | .id = -1, | |
1137 | .dev = { | |
04679b34 TH |
1138 | .release = the_pdev_release, |
1139 | }, | |
1140 | }; | |
1141 | ||
0392bbb6 | 1142 | static int __init vhci_hcd_init(void) |
04679b34 TH |
1143 | { |
1144 | int ret; | |
1145 | ||
04679b34 TH |
1146 | if (usb_disabled()) |
1147 | return -ENODEV; | |
1148 | ||
04679b34 TH |
1149 | ret = platform_driver_register(&vhci_driver); |
1150 | if (ret < 0) | |
1151 | goto err_driver_register; | |
1152 | ||
1153 | ret = platform_device_register(&the_pdev); | |
1154 | if (ret < 0) | |
1155 | goto err_platform_device_register; | |
1156 | ||
1a4b6f66 | 1157 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
04679b34 TH |
1158 | return ret; |
1159 | ||
04679b34 TH |
1160 | err_platform_device_register: |
1161 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1162 | err_driver_register: |
04679b34 TH |
1163 | return ret; |
1164 | } | |
04679b34 | 1165 | |
0392bbb6 | 1166 | static void __exit vhci_hcd_exit(void) |
04679b34 | 1167 | { |
04679b34 TH |
1168 | platform_device_unregister(&the_pdev); |
1169 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1170 | } |
071d1d47 | 1171 | |
0392bbb6 | 1172 | module_init(vhci_hcd_init); |
1173 | module_exit(vhci_hcd_exit); | |
071d1d47 | 1174 | |
1175 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1176 | MODULE_DESCRIPTION(DRIVER_DESC); | |
4ce0a41f | 1177 | MODULE_LICENSE("GPL"); |
6973c6f2 | 1178 | MODULE_VERSION(USBIP_VERSION); |