Commit | Line | Data |
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b69fada6 IPG |
1 | /* |
2 | * WUSB Wire Adapter: Control/Data Streaming Interface (WUSB[8]) | |
3 | * Device Connect handling | |
4 | * | |
5 | * Copyright (C) 2006 Intel Corporation | |
6 | * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
20 | * 02110-1301, USA. | |
21 | * | |
22 | * | |
23 | * FIXME: docs | |
24 | * FIXME: this file needs to be broken up, it's grown too big | |
25 | * | |
26 | * | |
27 | * WUSB1.0[7.1, 7.5.1, ] | |
28 | * | |
29 | * WUSB device connection is kind of messy. Some background: | |
30 | * | |
31 | * When a device wants to connect it scans the UWB radio channels | |
32 | * looking for a WUSB Channel; a WUSB channel is defined by MMCs | |
33 | * (Micro Managed Commands or something like that) [see | |
34 | * Design-overview for more on this] . | |
35 | * | |
36 | * So, device scans the radio, finds MMCs and thus a host and checks | |
37 | * when the next DNTS is. It sends a Device Notification Connect | |
38 | * (DN_Connect); the host picks it up (through nep.c and notif.c, ends | |
39 | * up in wusb_devconnect_ack(), which creates a wusb_dev structure in | |
40 | * wusbhc->port[port_number].wusb_dev), assigns an unauth address | |
41 | * to the device (this means from 0x80 to 0xfe) and sends, in the MMC | |
42 | * a Connect Ack Information Element (ConnAck IE). | |
43 | * | |
44 | * So now the device now has a WUSB address. From now on, we use | |
45 | * that to talk to it in the RPipes. | |
46 | * | |
47 | * ASSUMPTIONS: | |
48 | * | |
49 | * - We use the the as device address the port number where it is | |
50 | * connected (port 0 doesn't exist). For unauth, it is 128 + that. | |
51 | * | |
52 | * ROADMAP: | |
53 | * | |
54 | * This file contains the logic for doing that--entry points: | |
55 | * | |
56 | * wusb_devconnect_ack() Ack a device until _acked() called. | |
57 | * Called by notif.c:wusb_handle_dn_connect() | |
58 | * when a DN_Connect is received. | |
59 | * | |
b69fada6 IPG |
60 | * wusb_devconnect_acked() Ack done, release resources. |
61 | * | |
62 | * wusb_handle_dn_alive() Called by notif.c:wusb_handle_dn() | |
63 | * for processing a DN_Alive pong from a device. | |
64 | * | |
65 | * wusb_handle_dn_disconnect()Called by notif.c:wusb_handle_dn() to | |
66 | * process a disconenct request from a | |
67 | * device. | |
68 | * | |
b69fada6 IPG |
69 | * __wusb_dev_disable() Called by rh.c:wusbhc_rh_clear_port_feat() when |
70 | * disabling a port. | |
71 | * | |
72 | * wusb_devconnect_create() Called when creating the host by | |
73 | * lc.c:wusbhc_create(). | |
74 | * | |
75 | * wusb_devconnect_destroy() Cleanup called removing the host. Called | |
76 | * by lc.c:wusbhc_destroy(). | |
77 | * | |
78 | * Each Wireless USB host maintains a list of DN_Connect requests | |
79 | * (actually we maintain a list of pending Connect Acks, the | |
80 | * wusbhc->ca_list). | |
81 | * | |
82 | * LIFE CYCLE OF port->wusb_dev | |
83 | * | |
84 | * Before the @wusbhc structure put()s the reference it owns for | |
85 | * port->wusb_dev [and clean the wusb_dev pointer], it needs to | |
86 | * lock @wusbhc->mutex. | |
87 | */ | |
88 | ||
89 | #include <linux/jiffies.h> | |
90 | #include <linux/ctype.h> | |
5a0e3ad6 | 91 | #include <linux/slab.h> |
b69fada6 | 92 | #include <linux/workqueue.h> |
f940fcd8 | 93 | #include <linux/export.h> |
b69fada6 IPG |
94 | #include "wusbhc.h" |
95 | ||
b69fada6 IPG |
96 | static void wusbhc_devconnect_acked_work(struct work_struct *work); |
97 | ||
98 | static void wusb_dev_free(struct wusb_dev *wusb_dev) | |
99 | { | |
100 | if (wusb_dev) { | |
101 | kfree(wusb_dev->set_gtk_req); | |
102 | usb_free_urb(wusb_dev->set_gtk_urb); | |
103 | kfree(wusb_dev); | |
104 | } | |
105 | } | |
106 | ||
107 | static struct wusb_dev *wusb_dev_alloc(struct wusbhc *wusbhc) | |
108 | { | |
109 | struct wusb_dev *wusb_dev; | |
110 | struct urb *urb; | |
111 | struct usb_ctrlrequest *req; | |
112 | ||
113 | wusb_dev = kzalloc(sizeof(*wusb_dev), GFP_KERNEL); | |
114 | if (wusb_dev == NULL) | |
115 | goto err; | |
116 | ||
117 | wusb_dev->wusbhc = wusbhc; | |
118 | ||
119 | INIT_WORK(&wusb_dev->devconnect_acked_work, wusbhc_devconnect_acked_work); | |
120 | ||
121 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
122 | if (urb == NULL) | |
123 | goto err; | |
2e9729d0 | 124 | wusb_dev->set_gtk_urb = urb; |
b69fada6 | 125 | |
2e9729d0 | 126 | req = kmalloc(sizeof(*req), GFP_KERNEL); |
b69fada6 IPG |
127 | if (req == NULL) |
128 | goto err; | |
2e9729d0 | 129 | wusb_dev->set_gtk_req = req; |
b69fada6 IPG |
130 | |
131 | req->bRequestType = USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE; | |
132 | req->bRequest = USB_REQ_SET_DESCRIPTOR; | |
133 | req->wValue = cpu_to_le16(USB_DT_KEY << 8 | wusbhc->gtk_index); | |
134 | req->wIndex = 0; | |
135 | req->wLength = cpu_to_le16(wusbhc->gtk.descr.bLength); | |
136 | ||
b69fada6 IPG |
137 | return wusb_dev; |
138 | err: | |
139 | wusb_dev_free(wusb_dev); | |
140 | return NULL; | |
141 | } | |
142 | ||
143 | ||
144 | /* | |
145 | * Using the Connect-Ack list, fill out the @wusbhc Connect-Ack WUSB IE | |
146 | * properly so that it can be added to the MMC. | |
147 | * | |
148 | * We just get the @wusbhc->ca_list and fill out the first four ones or | |
149 | * less (per-spec WUSB1.0[7.5, before T7-38). If the ConnectAck WUSB | |
150 | * IE is not allocated, we alloc it. | |
151 | * | |
152 | * @wusbhc->mutex must be taken | |
153 | */ | |
154 | static void wusbhc_fill_cack_ie(struct wusbhc *wusbhc) | |
155 | { | |
156 | unsigned cnt; | |
157 | struct wusb_dev *dev_itr; | |
158 | struct wuie_connect_ack *cack_ie; | |
159 | ||
160 | cack_ie = &wusbhc->cack_ie; | |
161 | cnt = 0; | |
162 | list_for_each_entry(dev_itr, &wusbhc->cack_list, cack_node) { | |
163 | cack_ie->blk[cnt].CDID = dev_itr->cdid; | |
164 | cack_ie->blk[cnt].bDeviceAddress = dev_itr->addr; | |
165 | if (++cnt >= WUIE_ELT_MAX) | |
166 | break; | |
167 | } | |
168 | cack_ie->hdr.bLength = sizeof(cack_ie->hdr) | |
169 | + cnt * sizeof(cack_ie->blk[0]); | |
170 | } | |
171 | ||
172 | /* | |
173 | * Register a new device that wants to connect | |
174 | * | |
175 | * A new device wants to connect, so we add it to the Connect-Ack | |
176 | * list. We give it an address in the unauthorized range (bit 8 set); | |
177 | * user space will have to drive authorization further on. | |
178 | * | |
179 | * @dev_addr: address to use for the device (which is also the port | |
180 | * number). | |
181 | * | |
182 | * @wusbhc->mutex must be taken | |
183 | */ | |
184 | static struct wusb_dev *wusbhc_cack_add(struct wusbhc *wusbhc, | |
185 | struct wusb_dn_connect *dnc, | |
186 | const char *pr_cdid, u8 port_idx) | |
187 | { | |
188 | struct device *dev = wusbhc->dev; | |
189 | struct wusb_dev *wusb_dev; | |
190 | int new_connection = wusb_dn_connect_new_connection(dnc); | |
191 | u8 dev_addr; | |
192 | int result; | |
193 | ||
b69fada6 IPG |
194 | /* Is it registered already? */ |
195 | list_for_each_entry(wusb_dev, &wusbhc->cack_list, cack_node) | |
196 | if (!memcmp(&wusb_dev->cdid, &dnc->CDID, | |
197 | sizeof(wusb_dev->cdid))) | |
198 | return wusb_dev; | |
199 | /* We don't have it, create an entry, register it */ | |
200 | wusb_dev = wusb_dev_alloc(wusbhc); | |
8092d7c9 | 201 | if (wusb_dev == NULL) |
b69fada6 | 202 | return NULL; |
b69fada6 IPG |
203 | wusb_dev_init(wusb_dev); |
204 | wusb_dev->cdid = dnc->CDID; | |
205 | wusb_dev->port_idx = port_idx; | |
206 | ||
207 | /* | |
208 | * Devices are always available within the cluster reservation | |
209 | * and since the hardware will take the intersection of the | |
210 | * per-device availability and the cluster reservation, the | |
211 | * per-device availability can simply be set to always | |
212 | * available. | |
213 | */ | |
214 | bitmap_fill(wusb_dev->availability.bm, UWB_NUM_MAS); | |
215 | ||
216 | /* FIXME: handle reconnects instead of assuming connects are | |
217 | always new. */ | |
218 | if (1 && new_connection == 0) | |
219 | new_connection = 1; | |
220 | if (new_connection) { | |
221 | dev_addr = (port_idx + 2) | WUSB_DEV_ADDR_UNAUTH; | |
222 | ||
223 | dev_info(dev, "Connecting new WUSB device to address %u, " | |
224 | "port %u\n", dev_addr, port_idx); | |
225 | ||
226 | result = wusb_set_dev_addr(wusbhc, wusb_dev, dev_addr); | |
f51c23ba AL |
227 | if (result < 0) |
228 | return NULL; | |
b69fada6 IPG |
229 | } |
230 | wusb_dev->entry_ts = jiffies; | |
231 | list_add_tail(&wusb_dev->cack_node, &wusbhc->cack_list); | |
232 | wusbhc->cack_count++; | |
233 | wusbhc_fill_cack_ie(wusbhc); | |
bce83697 | 234 | |
b69fada6 IPG |
235 | return wusb_dev; |
236 | } | |
237 | ||
238 | /* | |
239 | * Remove a Connect-Ack context entry from the HCs view | |
240 | * | |
241 | * @wusbhc->mutex must be taken | |
242 | */ | |
243 | static void wusbhc_cack_rm(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) | |
244 | { | |
b69fada6 IPG |
245 | list_del_init(&wusb_dev->cack_node); |
246 | wusbhc->cack_count--; | |
247 | wusbhc_fill_cack_ie(wusbhc); | |
b69fada6 IPG |
248 | } |
249 | ||
250 | /* | |
251 | * @wusbhc->mutex must be taken */ | |
252 | static | |
253 | void wusbhc_devconnect_acked(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) | |
254 | { | |
b69fada6 IPG |
255 | wusbhc_cack_rm(wusbhc, wusb_dev); |
256 | if (wusbhc->cack_count) | |
257 | wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr); | |
258 | else | |
259 | wusbhc_mmcie_rm(wusbhc, &wusbhc->cack_ie.hdr); | |
b69fada6 IPG |
260 | } |
261 | ||
262 | static void wusbhc_devconnect_acked_work(struct work_struct *work) | |
263 | { | |
264 | struct wusb_dev *wusb_dev = container_of(work, struct wusb_dev, | |
265 | devconnect_acked_work); | |
266 | struct wusbhc *wusbhc = wusb_dev->wusbhc; | |
267 | ||
268 | mutex_lock(&wusbhc->mutex); | |
269 | wusbhc_devconnect_acked(wusbhc, wusb_dev); | |
270 | mutex_unlock(&wusbhc->mutex); | |
5936ac7f DV |
271 | |
272 | wusb_dev_put(wusb_dev); | |
b69fada6 IPG |
273 | } |
274 | ||
275 | /* | |
276 | * Ack a device for connection | |
277 | * | |
278 | * FIXME: docs | |
279 | * | |
280 | * @pr_cdid: Printable CDID...hex Use @dnc->cdid for the real deal. | |
281 | * | |
282 | * So we get the connect ack IE (may have been allocated already), | |
283 | * find an empty connect block, an empty virtual port, create an | |
284 | * address with it (see below), make it an unauth addr [bit 7 set] and | |
285 | * set the MMC. | |
286 | * | |
287 | * Addresses: because WUSB hosts have no downstream hubs, we can do a | |
288 | * 1:1 mapping between 'port number' and device | |
289 | * address. This simplifies many things, as during this | |
290 | * initial connect phase the USB stack has no knoledge of | |
291 | * the device and hasn't assigned an address yet--we know | |
292 | * USB's choose_address() will use the same euristics we | |
293 | * use here, so we can assume which address will be assigned. | |
294 | * | |
295 | * USB stack always assigns address 1 to the root hub, so | |
296 | * to the port number we add 2 (thus virtual port #0 is | |
297 | * addr #2). | |
298 | * | |
299 | * @wusbhc shall be referenced | |
300 | */ | |
301 | static | |
302 | void wusbhc_devconnect_ack(struct wusbhc *wusbhc, struct wusb_dn_connect *dnc, | |
303 | const char *pr_cdid) | |
304 | { | |
305 | int result; | |
306 | struct device *dev = wusbhc->dev; | |
307 | struct wusb_dev *wusb_dev; | |
308 | struct wusb_port *port; | |
309 | unsigned idx, devnum; | |
310 | ||
b69fada6 IPG |
311 | mutex_lock(&wusbhc->mutex); |
312 | ||
313 | /* Check we are not handling it already */ | |
314 | for (idx = 0; idx < wusbhc->ports_max; idx++) { | |
315 | port = wusb_port_by_idx(wusbhc, idx); | |
316 | if (port->wusb_dev | |
8092d7c9 | 317 | && memcmp(&dnc->CDID, &port->wusb_dev->cdid, sizeof(dnc->CDID)) == 0) |
b69fada6 | 318 | goto error_unlock; |
b69fada6 IPG |
319 | } |
320 | /* Look up those fake ports we have for a free one */ | |
321 | for (idx = 0; idx < wusbhc->ports_max; idx++) { | |
322 | port = wusb_port_by_idx(wusbhc, idx); | |
323 | if ((port->status & USB_PORT_STAT_POWER) | |
324 | && !(port->status & USB_PORT_STAT_CONNECTION)) | |
325 | break; | |
326 | } | |
327 | if (idx >= wusbhc->ports_max) { | |
328 | dev_err(dev, "Host controller can't connect more devices " | |
329 | "(%u already connected); device %s rejected\n", | |
330 | wusbhc->ports_max, pr_cdid); | |
331 | /* NOTE: we could send a WUIE_Disconnect here, but we haven't | |
332 | * event acked, so the device will eventually timeout the | |
333 | * connection, right? */ | |
334 | goto error_unlock; | |
335 | } | |
336 | ||
337 | devnum = idx + 2; | |
338 | ||
339 | /* Make sure we are using no crypto on that "virtual port" */ | |
340 | wusbhc->set_ptk(wusbhc, idx, 0, NULL, 0); | |
341 | ||
342 | /* Grab a filled in Connect-Ack context, fill out the | |
343 | * Connect-Ack Wireless USB IE, set the MMC */ | |
344 | wusb_dev = wusbhc_cack_add(wusbhc, dnc, pr_cdid, idx); | |
345 | if (wusb_dev == NULL) | |
346 | goto error_unlock; | |
347 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr); | |
348 | if (result < 0) | |
349 | goto error_unlock; | |
350 | /* Give the device at least 2ms (WUSB1.0[7.5.1p3]), let's do | |
351 | * three for a good measure */ | |
352 | msleep(3); | |
353 | port->wusb_dev = wusb_dev; | |
354 | port->status |= USB_PORT_STAT_CONNECTION; | |
355 | port->change |= USB_PORT_STAT_C_CONNECTION; | |
b69fada6 IPG |
356 | /* Now the port status changed to connected; khubd will |
357 | * pick the change up and try to reset the port to bring it to | |
358 | * the enabled state--so this process returns up to the stack | |
4656d5de | 359 | * and it calls back into wusbhc_rh_port_reset(). |
b69fada6 IPG |
360 | */ |
361 | error_unlock: | |
362 | mutex_unlock(&wusbhc->mutex); | |
b69fada6 IPG |
363 | return; |
364 | ||
365 | } | |
366 | ||
367 | /* | |
368 | * Disconnect a Wireless USB device from its fake port | |
369 | * | |
370 | * Marks the port as disconnected so that khubd can pick up the change | |
371 | * and drops our knowledge about the device. | |
372 | * | |
373 | * Assumes there is a device connected | |
374 | * | |
375 | * @port_index: zero based port number | |
376 | * | |
377 | * NOTE: @wusbhc->mutex is locked | |
378 | * | |
379 | * WARNING: From here it is not very safe to access anything hanging off | |
380 | * wusb_dev | |
381 | */ | |
382 | static void __wusbhc_dev_disconnect(struct wusbhc *wusbhc, | |
383 | struct wusb_port *port) | |
384 | { | |
b69fada6 IPG |
385 | struct wusb_dev *wusb_dev = port->wusb_dev; |
386 | ||
b69fada6 IPG |
387 | port->status &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE |
388 | | USB_PORT_STAT_SUSPEND | USB_PORT_STAT_RESET | |
389 | | USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED); | |
390 | port->change |= USB_PORT_STAT_C_CONNECTION | USB_PORT_STAT_C_ENABLE; | |
391 | if (wusb_dev) { | |
9a9b1d17 | 392 | dev_dbg(wusbhc->dev, "disconnecting device from port %d\n", wusb_dev->port_idx); |
b69fada6 IPG |
393 | if (!list_empty(&wusb_dev->cack_node)) |
394 | list_del_init(&wusb_dev->cack_node); | |
395 | /* For the one in cack_add() */ | |
396 | wusb_dev_put(wusb_dev); | |
397 | } | |
398 | port->wusb_dev = NULL; | |
b69fada6 IPG |
399 | |
400 | /* After a device disconnects, change the GTK (see [WUSB] | |
401 | * section 6.2.11.2). */ | |
8db324ec DV |
402 | if (wusbhc->active) |
403 | wusbhc_gtk_rekey(wusbhc); | |
b69fada6 | 404 | |
b69fada6 IPG |
405 | /* The Wireless USB part has forgotten about the device already; now |
406 | * khubd's timer will pick up the disconnection and remove the USB | |
407 | * device from the system | |
408 | */ | |
409 | } | |
410 | ||
b69fada6 IPG |
411 | /* |
412 | * Refresh the list of keep alives to emit in the MMC | |
413 | * | |
414 | * Some devices don't respond to keep alives unless they've been | |
415 | * authenticated, so skip unauthenticated devices. | |
416 | * | |
417 | * We only publish the first four devices that have a coming timeout | |
418 | * condition. Then when we are done processing those, we go for the | |
419 | * next ones. We ignore the ones that have timed out already (they'll | |
420 | * be purged). | |
421 | * | |
422 | * This might cause the first devices to timeout the last devices in | |
423 | * the port array...FIXME: come up with a better algorithm? | |
424 | * | |
425 | * Note we can't do much about MMC's ops errors; we hope next refresh | |
426 | * will kind of handle it. | |
427 | * | |
428 | * NOTE: @wusbhc->mutex is locked | |
429 | */ | |
430 | static void __wusbhc_keep_alive(struct wusbhc *wusbhc) | |
431 | { | |
b69fada6 IPG |
432 | struct device *dev = wusbhc->dev; |
433 | unsigned cnt; | |
434 | struct wusb_dev *wusb_dev; | |
435 | struct wusb_port *wusb_port; | |
436 | struct wuie_keep_alive *ie = &wusbhc->keep_alive_ie; | |
437 | unsigned keep_alives, old_keep_alives; | |
438 | ||
b69fada6 IPG |
439 | old_keep_alives = ie->hdr.bLength - sizeof(ie->hdr); |
440 | keep_alives = 0; | |
441 | for (cnt = 0; | |
a23b6484 | 442 | keep_alives < WUIE_ELT_MAX && cnt < wusbhc->ports_max; |
b69fada6 IPG |
443 | cnt++) { |
444 | unsigned tt = msecs_to_jiffies(wusbhc->trust_timeout); | |
445 | ||
446 | wusb_port = wusb_port_by_idx(wusbhc, cnt); | |
447 | wusb_dev = wusb_port->wusb_dev; | |
448 | ||
449 | if (wusb_dev == NULL) | |
450 | continue; | |
451 | if (wusb_dev->usb_dev == NULL || !wusb_dev->usb_dev->authenticated) | |
452 | continue; | |
453 | ||
454 | if (time_after(jiffies, wusb_dev->entry_ts + tt)) { | |
455 | dev_err(dev, "KEEPALIVE: device %u timed out\n", | |
456 | wusb_dev->addr); | |
457 | __wusbhc_dev_disconnect(wusbhc, wusb_port); | |
7d9852a8 TP |
458 | } else if (time_after(jiffies, wusb_dev->entry_ts + tt/3)) { |
459 | /* Approaching timeout cut off, need to refresh */ | |
b69fada6 IPG |
460 | ie->bDeviceAddress[keep_alives++] = wusb_dev->addr; |
461 | } | |
462 | } | |
463 | if (keep_alives & 0x1) /* pad to even number ([WUSB] section 7.5.9) */ | |
464 | ie->bDeviceAddress[keep_alives++] = 0x7f; | |
465 | ie->hdr.bLength = sizeof(ie->hdr) + | |
466 | keep_alives*sizeof(ie->bDeviceAddress[0]); | |
8092d7c9 DV |
467 | if (keep_alives > 0) |
468 | wusbhc_mmcie_set(wusbhc, 10, 5, &ie->hdr); | |
469 | else if (old_keep_alives != 0) | |
b69fada6 | 470 | wusbhc_mmcie_rm(wusbhc, &ie->hdr); |
b69fada6 IPG |
471 | } |
472 | ||
473 | /* | |
474 | * Do a run through all devices checking for timeouts | |
475 | */ | |
476 | static void wusbhc_keep_alive_run(struct work_struct *ws) | |
477 | { | |
bf6aede7 | 478 | struct delayed_work *dw = to_delayed_work(ws); |
56968d0c DV |
479 | struct wusbhc *wusbhc = container_of(dw, struct wusbhc, keep_alive_timer); |
480 | ||
481 | mutex_lock(&wusbhc->mutex); | |
482 | __wusbhc_keep_alive(wusbhc); | |
483 | mutex_unlock(&wusbhc->mutex); | |
484 | ||
485 | queue_delayed_work(wusbd, &wusbhc->keep_alive_timer, | |
486 | msecs_to_jiffies(wusbhc->trust_timeout / 2)); | |
b69fada6 IPG |
487 | } |
488 | ||
489 | /* | |
490 | * Find the wusb_dev from its device address. | |
491 | * | |
492 | * The device can be found directly from the address (see | |
493 | * wusb_cack_add() for where the device address is set to port_idx | |
494 | * +2), except when the address is zero. | |
495 | */ | |
496 | static struct wusb_dev *wusbhc_find_dev_by_addr(struct wusbhc *wusbhc, u8 addr) | |
497 | { | |
498 | int p; | |
499 | ||
500 | if (addr == 0xff) /* unconnected */ | |
501 | return NULL; | |
502 | ||
503 | if (addr > 0) { | |
504 | int port = (addr & ~0x80) - 2; | |
505 | if (port < 0 || port >= wusbhc->ports_max) | |
506 | return NULL; | |
507 | return wusb_port_by_idx(wusbhc, port)->wusb_dev; | |
508 | } | |
509 | ||
510 | /* Look for the device with address 0. */ | |
511 | for (p = 0; p < wusbhc->ports_max; p++) { | |
512 | struct wusb_dev *wusb_dev = wusb_port_by_idx(wusbhc, p)->wusb_dev; | |
513 | if (wusb_dev && wusb_dev->addr == addr) | |
514 | return wusb_dev; | |
515 | } | |
516 | return NULL; | |
517 | } | |
518 | ||
519 | /* | |
520 | * Handle a DN_Alive notification (WUSB1.0[7.6.1]) | |
521 | * | |
522 | * This just updates the device activity timestamp and then refreshes | |
523 | * the keep alive IE. | |
524 | * | |
525 | * @wusbhc shall be referenced and unlocked | |
526 | */ | |
527 | static void wusbhc_handle_dn_alive(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) | |
528 | { | |
b69fada6 IPG |
529 | mutex_lock(&wusbhc->mutex); |
530 | wusb_dev->entry_ts = jiffies; | |
531 | __wusbhc_keep_alive(wusbhc); | |
532 | mutex_unlock(&wusbhc->mutex); | |
533 | } | |
534 | ||
535 | /* | |
536 | * Handle a DN_Connect notification (WUSB1.0[7.6.1]) | |
537 | * | |
538 | * @wusbhc | |
539 | * @pkt_hdr | |
540 | * @size: Size of the buffer where the notification resides; if the | |
541 | * notification data suggests there should be more data than | |
542 | * available, an error will be signaled and the whole buffer | |
543 | * consumed. | |
544 | * | |
545 | * @wusbhc->mutex shall be held | |
546 | */ | |
547 | static void wusbhc_handle_dn_connect(struct wusbhc *wusbhc, | |
548 | struct wusb_dn_hdr *dn_hdr, | |
549 | size_t size) | |
550 | { | |
551 | struct device *dev = wusbhc->dev; | |
552 | struct wusb_dn_connect *dnc; | |
553 | char pr_cdid[WUSB_CKHDID_STRSIZE]; | |
554 | static const char *beacon_behaviour[] = { | |
555 | "reserved", | |
556 | "self-beacon", | |
557 | "directed-beacon", | |
558 | "no-beacon" | |
559 | }; | |
560 | ||
b69fada6 IPG |
561 | if (size < sizeof(*dnc)) { |
562 | dev_err(dev, "DN CONNECT: short notification (%zu < %zu)\n", | |
563 | size, sizeof(*dnc)); | |
bce83697 | 564 | return; |
b69fada6 IPG |
565 | } |
566 | ||
567 | dnc = container_of(dn_hdr, struct wusb_dn_connect, hdr); | |
568 | ckhdid_printf(pr_cdid, sizeof(pr_cdid), &dnc->CDID); | |
569 | dev_info(dev, "DN CONNECT: device %s @ %x (%s) wants to %s\n", | |
570 | pr_cdid, | |
571 | wusb_dn_connect_prev_dev_addr(dnc), | |
572 | beacon_behaviour[wusb_dn_connect_beacon_behavior(dnc)], | |
573 | wusb_dn_connect_new_connection(dnc) ? "connect" : "reconnect"); | |
574 | /* ACK the connect */ | |
575 | wusbhc_devconnect_ack(wusbhc, dnc, pr_cdid); | |
b69fada6 IPG |
576 | } |
577 | ||
578 | /* | |
579 | * Handle a DN_Disconnect notification (WUSB1.0[7.6.1]) | |
580 | * | |
581 | * Device is going down -- do the disconnect. | |
582 | * | |
583 | * @wusbhc shall be referenced and unlocked | |
584 | */ | |
585 | static void wusbhc_handle_dn_disconnect(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) | |
586 | { | |
587 | struct device *dev = wusbhc->dev; | |
588 | ||
589 | dev_info(dev, "DN DISCONNECT: device 0x%02x going down\n", wusb_dev->addr); | |
590 | ||
591 | mutex_lock(&wusbhc->mutex); | |
592 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, wusb_dev->port_idx)); | |
593 | mutex_unlock(&wusbhc->mutex); | |
594 | } | |
595 | ||
b69fada6 IPG |
596 | /* |
597 | * Handle a Device Notification coming a host | |
598 | * | |
599 | * The Device Notification comes from a host (HWA, DWA or WHCI) | |
600 | * wrapped in a set of headers. Somebody else has peeled off those | |
601 | * headers for us and we just get one Device Notifications. | |
602 | * | |
603 | * Invalid DNs (e.g., too short) are discarded. | |
604 | * | |
605 | * @wusbhc shall be referenced | |
606 | * | |
607 | * FIXMES: | |
608 | * - implement priorities as in WUSB1.0[Table 7-55]? | |
609 | */ | |
610 | void wusbhc_handle_dn(struct wusbhc *wusbhc, u8 srcaddr, | |
611 | struct wusb_dn_hdr *dn_hdr, size_t size) | |
612 | { | |
613 | struct device *dev = wusbhc->dev; | |
614 | struct wusb_dev *wusb_dev; | |
615 | ||
b69fada6 IPG |
616 | if (size < sizeof(struct wusb_dn_hdr)) { |
617 | dev_err(dev, "DN data shorter than DN header (%d < %d)\n", | |
618 | (int)size, (int)sizeof(struct wusb_dn_hdr)); | |
bce83697 | 619 | return; |
b69fada6 IPG |
620 | } |
621 | ||
622 | wusb_dev = wusbhc_find_dev_by_addr(wusbhc, srcaddr); | |
623 | if (wusb_dev == NULL && dn_hdr->bType != WUSB_DN_CONNECT) { | |
624 | dev_dbg(dev, "ignoring DN %d from unconnected device %02x\n", | |
625 | dn_hdr->bType, srcaddr); | |
bce83697 | 626 | return; |
b69fada6 IPG |
627 | } |
628 | ||
629 | switch (dn_hdr->bType) { | |
630 | case WUSB_DN_CONNECT: | |
631 | wusbhc_handle_dn_connect(wusbhc, dn_hdr, size); | |
632 | break; | |
633 | case WUSB_DN_ALIVE: | |
634 | wusbhc_handle_dn_alive(wusbhc, wusb_dev); | |
635 | break; | |
636 | case WUSB_DN_DISCONNECT: | |
637 | wusbhc_handle_dn_disconnect(wusbhc, wusb_dev); | |
638 | break; | |
639 | case WUSB_DN_MASAVAILCHANGED: | |
640 | case WUSB_DN_RWAKE: | |
641 | case WUSB_DN_SLEEP: | |
642 | /* FIXME: handle these DNs. */ | |
643 | break; | |
644 | case WUSB_DN_EPRDY: | |
645 | /* The hardware handles these. */ | |
646 | break; | |
647 | default: | |
648 | dev_warn(dev, "unknown DN %u (%d octets) from %u\n", | |
649 | dn_hdr->bType, (int)size, srcaddr); | |
650 | } | |
b69fada6 IPG |
651 | } |
652 | EXPORT_SYMBOL_GPL(wusbhc_handle_dn); | |
653 | ||
654 | /* | |
655 | * Disconnect a WUSB device from a the cluster | |
656 | * | |
657 | * @wusbhc | |
658 | * @port Fake port where the device is (wusbhc index, not USB port number). | |
659 | * | |
660 | * In Wireless USB, a disconnect is basically telling the device he is | |
661 | * being disconnected and forgetting about him. | |
662 | * | |
663 | * We send the device a Device Disconnect IE (WUSB1.0[7.5.11]) for 100 | |
664 | * ms and then keep going. | |
665 | * | |
666 | * We don't do much in case of error; we always pretend we disabled | |
667 | * the port and disconnected the device. If physically the request | |
668 | * didn't get there (many things can fail in the way there), the stack | |
669 | * will reject the device's communication attempts. | |
670 | * | |
671 | * @wusbhc should be refcounted and locked | |
672 | */ | |
673 | void __wusbhc_dev_disable(struct wusbhc *wusbhc, u8 port_idx) | |
674 | { | |
675 | int result; | |
676 | struct device *dev = wusbhc->dev; | |
677 | struct wusb_dev *wusb_dev; | |
678 | struct wuie_disconnect *ie; | |
679 | ||
b69fada6 IPG |
680 | wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev; |
681 | if (wusb_dev == NULL) { | |
682 | /* reset no device? ignore */ | |
683 | dev_dbg(dev, "DISCONNECT: no device at port %u, ignoring\n", | |
684 | port_idx); | |
bce83697 | 685 | return; |
b69fada6 IPG |
686 | } |
687 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx)); | |
688 | ||
b69fada6 IPG |
689 | ie = kzalloc(sizeof(*ie), GFP_KERNEL); |
690 | if (ie == NULL) | |
bce83697 | 691 | return; |
b69fada6 IPG |
692 | ie->hdr.bLength = sizeof(*ie); |
693 | ie->hdr.bIEIdentifier = WUIE_ID_DEVICE_DISCONNECT; | |
694 | ie->bDeviceAddress = wusb_dev->addr; | |
695 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &ie->hdr); | |
bce83697 | 696 | if (result < 0) |
b69fada6 | 697 | dev_err(dev, "DISCONNECT: can't set MMC: %d\n", result); |
bce83697 DV |
698 | else { |
699 | /* At least 6 MMCs, assuming at least 1 MMC per zone. */ | |
700 | msleep(7*4); | |
701 | wusbhc_mmcie_rm(wusbhc, &ie->hdr); | |
b69fada6 | 702 | } |
b69fada6 | 703 | kfree(ie); |
b69fada6 IPG |
704 | } |
705 | ||
706 | /* | |
707 | * Walk over the BOS descriptor, verify and grok it | |
708 | * | |
709 | * @usb_dev: referenced | |
710 | * @wusb_dev: referenced and unlocked | |
711 | * | |
712 | * The BOS descriptor is defined at WUSB1.0[7.4.1], and it defines a | |
713 | * "flexible" way to wrap all kinds of descriptors inside an standard | |
714 | * descriptor (wonder why they didn't use normal descriptors, | |
715 | * btw). Not like they lack code. | |
716 | * | |
717 | * At the end we go to look for the WUSB Device Capabilities | |
718 | * (WUSB1.0[7.4.1.1]) that is wrapped in a device capability descriptor | |
719 | * that is part of the BOS descriptor set. That tells us what does the | |
720 | * device support (dual role, beacon type, UWB PHY rates). | |
721 | */ | |
722 | static int wusb_dev_bos_grok(struct usb_device *usb_dev, | |
723 | struct wusb_dev *wusb_dev, | |
724 | struct usb_bos_descriptor *bos, size_t desc_size) | |
725 | { | |
726 | ssize_t result; | |
727 | struct device *dev = &usb_dev->dev; | |
728 | void *itr, *top; | |
729 | ||
730 | /* Walk over BOS capabilities, verify them */ | |
731 | itr = (void *)bos + sizeof(*bos); | |
732 | top = itr + desc_size - sizeof(*bos); | |
733 | while (itr < top) { | |
734 | struct usb_dev_cap_header *cap_hdr = itr; | |
735 | size_t cap_size; | |
736 | u8 cap_type; | |
737 | if (top - itr < sizeof(*cap_hdr)) { | |
738 | dev_err(dev, "Device BUG? premature end of BOS header " | |
739 | "data [offset 0x%02x]: only %zu bytes left\n", | |
740 | (int)(itr - (void *)bos), top - itr); | |
741 | result = -ENOSPC; | |
742 | goto error_bad_cap; | |
743 | } | |
744 | cap_size = cap_hdr->bLength; | |
745 | cap_type = cap_hdr->bDevCapabilityType; | |
b69fada6 IPG |
746 | if (cap_size == 0) |
747 | break; | |
748 | if (cap_size > top - itr) { | |
749 | dev_err(dev, "Device BUG? premature end of BOS data " | |
750 | "[offset 0x%02x cap %02x %zu bytes]: " | |
751 | "only %zu bytes left\n", | |
752 | (int)(itr - (void *)bos), | |
753 | cap_type, cap_size, top - itr); | |
754 | result = -EBADF; | |
755 | goto error_bad_cap; | |
756 | } | |
b69fada6 IPG |
757 | switch (cap_type) { |
758 | case USB_CAP_TYPE_WIRELESS_USB: | |
759 | if (cap_size != sizeof(*wusb_dev->wusb_cap_descr)) | |
760 | dev_err(dev, "Device BUG? WUSB Capability " | |
761 | "descriptor is %zu bytes vs %zu " | |
762 | "needed\n", cap_size, | |
763 | sizeof(*wusb_dev->wusb_cap_descr)); | |
bce83697 | 764 | else |
b69fada6 | 765 | wusb_dev->wusb_cap_descr = itr; |
b69fada6 IPG |
766 | break; |
767 | default: | |
768 | dev_err(dev, "BUG? Unknown BOS capability 0x%02x " | |
769 | "(%zu bytes) at offset 0x%02x\n", cap_type, | |
770 | cap_size, (int)(itr - (void *)bos)); | |
771 | } | |
772 | itr += cap_size; | |
773 | } | |
774 | result = 0; | |
775 | error_bad_cap: | |
776 | return result; | |
777 | } | |
778 | ||
779 | /* | |
780 | * Add information from the BOS descriptors to the device | |
781 | * | |
782 | * @usb_dev: referenced | |
783 | * @wusb_dev: referenced and unlocked | |
784 | * | |
785 | * So what we do is we alloc a space for the BOS descriptor of 64 | |
786 | * bytes; read the first four bytes which include the wTotalLength | |
787 | * field (WUSB1.0[T7-26]) and if it fits in those 64 bytes, read the | |
788 | * whole thing. If not we realloc to that size. | |
789 | * | |
790 | * Then we call the groking function, that will fill up | |
791 | * wusb_dev->wusb_cap_descr, which is what we'll need later on. | |
792 | */ | |
793 | static int wusb_dev_bos_add(struct usb_device *usb_dev, | |
794 | struct wusb_dev *wusb_dev) | |
795 | { | |
796 | ssize_t result; | |
797 | struct device *dev = &usb_dev->dev; | |
798 | struct usb_bos_descriptor *bos; | |
799 | size_t alloc_size = 32, desc_size = 4; | |
800 | ||
801 | bos = kmalloc(alloc_size, GFP_KERNEL); | |
802 | if (bos == NULL) | |
803 | return -ENOMEM; | |
804 | result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size); | |
805 | if (result < 4) { | |
806 | dev_err(dev, "Can't get BOS descriptor or too short: %zd\n", | |
807 | result); | |
808 | goto error_get_descriptor; | |
809 | } | |
810 | desc_size = le16_to_cpu(bos->wTotalLength); | |
811 | if (desc_size >= alloc_size) { | |
812 | kfree(bos); | |
813 | alloc_size = desc_size; | |
814 | bos = kmalloc(alloc_size, GFP_KERNEL); | |
815 | if (bos == NULL) | |
816 | return -ENOMEM; | |
817 | } | |
818 | result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size); | |
819 | if (result < 0 || result != desc_size) { | |
820 | dev_err(dev, "Can't get BOS descriptor or too short (need " | |
821 | "%zu bytes): %zd\n", desc_size, result); | |
822 | goto error_get_descriptor; | |
823 | } | |
824 | if (result < sizeof(*bos) | |
825 | || le16_to_cpu(bos->wTotalLength) != desc_size) { | |
826 | dev_err(dev, "Can't get BOS descriptor or too short (need " | |
827 | "%zu bytes): %zd\n", desc_size, result); | |
828 | goto error_get_descriptor; | |
829 | } | |
bce83697 | 830 | |
b69fada6 IPG |
831 | result = wusb_dev_bos_grok(usb_dev, wusb_dev, bos, result); |
832 | if (result < 0) | |
833 | goto error_bad_bos; | |
834 | wusb_dev->bos = bos; | |
835 | return 0; | |
836 | ||
837 | error_bad_bos: | |
838 | error_get_descriptor: | |
839 | kfree(bos); | |
840 | wusb_dev->wusb_cap_descr = NULL; | |
841 | return result; | |
842 | } | |
843 | ||
844 | static void wusb_dev_bos_rm(struct wusb_dev *wusb_dev) | |
845 | { | |
846 | kfree(wusb_dev->bos); | |
847 | wusb_dev->wusb_cap_descr = NULL; | |
848 | }; | |
849 | ||
b69fada6 IPG |
850 | /* |
851 | * USB stack's device addition Notifier Callback | |
852 | * | |
853 | * Called from drivers/usb/core/hub.c when a new device is added; we | |
854 | * use this hook to perform certain WUSB specific setup work on the | |
855 | * new device. As well, it is the first time we can connect the | |
856 | * wusb_dev and the usb_dev. So we note it down in wusb_dev and take a | |
857 | * reference that we'll drop. | |
858 | * | |
859 | * First we need to determine if the device is a WUSB device (else we | |
551cdbbe | 860 | * ignore it). For that we use the speed setting (USB_SPEED_WIRELESS) |
b69fada6 IPG |
861 | * [FIXME: maybe we'd need something more definitive]. If so, we track |
862 | * it's usb_busd and from there, the WUSB HC. | |
863 | * | |
864 | * Because all WUSB HCs are contained in a 'struct wusbhc', voila, we | |
865 | * get the wusbhc for the device. | |
866 | * | |
867 | * We have a reference on @usb_dev (as we are called at the end of its | |
868 | * enumeration). | |
869 | * | |
870 | * NOTE: @usb_dev locked | |
871 | */ | |
872 | static void wusb_dev_add_ncb(struct usb_device *usb_dev) | |
873 | { | |
874 | int result = 0; | |
875 | struct wusb_dev *wusb_dev; | |
876 | struct wusbhc *wusbhc; | |
877 | struct device *dev = &usb_dev->dev; | |
878 | u8 port_idx; | |
879 | ||
880 | if (usb_dev->wusb == 0 || usb_dev->devnum == 1) | |
881 | return; /* skip non wusb and wusb RHs */ | |
882 | ||
6da9c990 DV |
883 | usb_set_device_state(usb_dev, USB_STATE_UNAUTHENTICATED); |
884 | ||
b69fada6 IPG |
885 | wusbhc = wusbhc_get_by_usb_dev(usb_dev); |
886 | if (wusbhc == NULL) | |
887 | goto error_nodev; | |
888 | mutex_lock(&wusbhc->mutex); | |
889 | wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, usb_dev); | |
890 | port_idx = wusb_port_no_to_idx(usb_dev->portnum); | |
891 | mutex_unlock(&wusbhc->mutex); | |
892 | if (wusb_dev == NULL) | |
893 | goto error_nodev; | |
894 | wusb_dev->usb_dev = usb_get_dev(usb_dev); | |
895 | usb_dev->wusb_dev = wusb_dev_get(wusb_dev); | |
896 | result = wusb_dev_sec_add(wusbhc, usb_dev, wusb_dev); | |
897 | if (result < 0) { | |
898 | dev_err(dev, "Cannot enable security: %d\n", result); | |
899 | goto error_sec_add; | |
900 | } | |
901 | /* Now query the device for it's BOS and attach it to wusb_dev */ | |
902 | result = wusb_dev_bos_add(usb_dev, wusb_dev); | |
903 | if (result < 0) { | |
904 | dev_err(dev, "Cannot get BOS descriptors: %d\n", result); | |
905 | goto error_bos_add; | |
906 | } | |
907 | result = wusb_dev_sysfs_add(wusbhc, usb_dev, wusb_dev); | |
908 | if (result < 0) | |
909 | goto error_add_sysfs; | |
910 | out: | |
911 | wusb_dev_put(wusb_dev); | |
912 | wusbhc_put(wusbhc); | |
913 | error_nodev: | |
b69fada6 IPG |
914 | return; |
915 | ||
916 | wusb_dev_sysfs_rm(wusb_dev); | |
917 | error_add_sysfs: | |
918 | wusb_dev_bos_rm(wusb_dev); | |
919 | error_bos_add: | |
920 | wusb_dev_sec_rm(wusb_dev); | |
921 | error_sec_add: | |
922 | mutex_lock(&wusbhc->mutex); | |
923 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx)); | |
924 | mutex_unlock(&wusbhc->mutex); | |
925 | goto out; | |
926 | } | |
927 | ||
928 | /* | |
929 | * Undo all the steps done at connection by the notifier callback | |
930 | * | |
931 | * NOTE: @usb_dev locked | |
932 | */ | |
933 | static void wusb_dev_rm_ncb(struct usb_device *usb_dev) | |
934 | { | |
935 | struct wusb_dev *wusb_dev = usb_dev->wusb_dev; | |
936 | ||
937 | if (usb_dev->wusb == 0 || usb_dev->devnum == 1) | |
938 | return; /* skip non wusb and wusb RHs */ | |
939 | ||
940 | wusb_dev_sysfs_rm(wusb_dev); | |
941 | wusb_dev_bos_rm(wusb_dev); | |
942 | wusb_dev_sec_rm(wusb_dev); | |
943 | wusb_dev->usb_dev = NULL; | |
944 | usb_dev->wusb_dev = NULL; | |
945 | wusb_dev_put(wusb_dev); | |
946 | usb_put_dev(usb_dev); | |
947 | } | |
948 | ||
949 | /* | |
950 | * Handle notifications from the USB stack (notifier call back) | |
951 | * | |
952 | * This is called when the USB stack does a | |
953 | * usb_{bus,device}_{add,remove}() so we can do WUSB specific | |
954 | * handling. It is called with [for the case of | |
955 | * USB_DEVICE_{ADD,REMOVE} with the usb_dev locked. | |
956 | */ | |
957 | int wusb_usb_ncb(struct notifier_block *nb, unsigned long val, | |
958 | void *priv) | |
959 | { | |
960 | int result = NOTIFY_OK; | |
961 | ||
962 | switch (val) { | |
963 | case USB_DEVICE_ADD: | |
964 | wusb_dev_add_ncb(priv); | |
965 | break; | |
966 | case USB_DEVICE_REMOVE: | |
967 | wusb_dev_rm_ncb(priv); | |
968 | break; | |
969 | case USB_BUS_ADD: | |
970 | /* ignore (for now) */ | |
971 | case USB_BUS_REMOVE: | |
972 | break; | |
973 | default: | |
974 | WARN_ON(1); | |
975 | result = NOTIFY_BAD; | |
2b84f92b | 976 | } |
b69fada6 IPG |
977 | return result; |
978 | } | |
979 | ||
980 | /* | |
981 | * Return a referenced wusb_dev given a @wusbhc and @usb_dev | |
982 | */ | |
983 | struct wusb_dev *__wusb_dev_get_by_usb_dev(struct wusbhc *wusbhc, | |
984 | struct usb_device *usb_dev) | |
985 | { | |
986 | struct wusb_dev *wusb_dev; | |
987 | u8 port_idx; | |
988 | ||
989 | port_idx = wusb_port_no_to_idx(usb_dev->portnum); | |
990 | BUG_ON(port_idx > wusbhc->ports_max); | |
991 | wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev; | |
992 | if (wusb_dev != NULL) /* ops, device is gone */ | |
993 | wusb_dev_get(wusb_dev); | |
994 | return wusb_dev; | |
995 | } | |
996 | EXPORT_SYMBOL_GPL(__wusb_dev_get_by_usb_dev); | |
997 | ||
998 | void wusb_dev_destroy(struct kref *_wusb_dev) | |
999 | { | |
bce83697 DV |
1000 | struct wusb_dev *wusb_dev = container_of(_wusb_dev, struct wusb_dev, refcnt); |
1001 | ||
b69fada6 IPG |
1002 | list_del_init(&wusb_dev->cack_node); |
1003 | wusb_dev_free(wusb_dev); | |
b69fada6 IPG |
1004 | } |
1005 | EXPORT_SYMBOL_GPL(wusb_dev_destroy); | |
1006 | ||
1007 | /* | |
1008 | * Create all the device connect handling infrastructure | |
1009 | * | |
1010 | * This is basically the device info array, Connect Acknowledgement | |
1011 | * (cack) lists, keep-alive timers (and delayed work thread). | |
1012 | */ | |
1013 | int wusbhc_devconnect_create(struct wusbhc *wusbhc) | |
1014 | { | |
b69fada6 IPG |
1015 | wusbhc->keep_alive_ie.hdr.bIEIdentifier = WUIE_ID_KEEP_ALIVE; |
1016 | wusbhc->keep_alive_ie.hdr.bLength = sizeof(wusbhc->keep_alive_ie.hdr); | |
1017 | INIT_DELAYED_WORK(&wusbhc->keep_alive_timer, wusbhc_keep_alive_run); | |
1018 | ||
1019 | wusbhc->cack_ie.hdr.bIEIdentifier = WUIE_ID_CONNECTACK; | |
1020 | wusbhc->cack_ie.hdr.bLength = sizeof(wusbhc->cack_ie.hdr); | |
1021 | INIT_LIST_HEAD(&wusbhc->cack_list); | |
1022 | ||
b69fada6 IPG |
1023 | return 0; |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * Release all resources taken by the devconnect stuff | |
1028 | */ | |
1029 | void wusbhc_devconnect_destroy(struct wusbhc *wusbhc) | |
1030 | { | |
bce83697 | 1031 | /* no op */ |
b69fada6 IPG |
1032 | } |
1033 | ||
1034 | /* | |
1035 | * wusbhc_devconnect_start - start accepting device connections | |
1036 | * @wusbhc: the WUSB HC | |
1037 | * | |
1038 | * Sets the Host Info IE to accept all new connections. | |
1039 | * | |
1040 | * FIXME: This also enables the keep alives but this is not necessary | |
1041 | * until there are connected and authenticated devices. | |
1042 | */ | |
6fae35f9 | 1043 | int wusbhc_devconnect_start(struct wusbhc *wusbhc) |
b69fada6 IPG |
1044 | { |
1045 | struct device *dev = wusbhc->dev; | |
1046 | struct wuie_host_info *hi; | |
1047 | int result; | |
1048 | ||
1049 | hi = kzalloc(sizeof(*hi), GFP_KERNEL); | |
1050 | if (hi == NULL) | |
1051 | return -ENOMEM; | |
1052 | ||
1053 | hi->hdr.bLength = sizeof(*hi); | |
1054 | hi->hdr.bIEIdentifier = WUIE_ID_HOST_INFO; | |
1055 | hi->attributes = cpu_to_le16((wusbhc->rsv->stream << 3) | WUIE_HI_CAP_ALL); | |
6fae35f9 | 1056 | hi->CHID = wusbhc->chid; |
b69fada6 IPG |
1057 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &hi->hdr); |
1058 | if (result < 0) { | |
1059 | dev_err(dev, "Cannot add Host Info MMCIE: %d\n", result); | |
1060 | goto error_mmcie_set; | |
1061 | } | |
1062 | wusbhc->wuie_host_info = hi; | |
1063 | ||
1064 | queue_delayed_work(wusbd, &wusbhc->keep_alive_timer, | |
7d9852a8 | 1065 | msecs_to_jiffies(wusbhc->trust_timeout / 2)); |
b69fada6 IPG |
1066 | |
1067 | return 0; | |
1068 | ||
1069 | error_mmcie_set: | |
1070 | kfree(hi); | |
1071 | return result; | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * wusbhc_devconnect_stop - stop managing connected devices | |
1076 | * @wusbhc: the WUSB HC | |
1077 | * | |
8db324ec DV |
1078 | * Disconnects any devices still connected, stops the keep alives and |
1079 | * removes the Host Info IE. | |
b69fada6 IPG |
1080 | */ |
1081 | void wusbhc_devconnect_stop(struct wusbhc *wusbhc) | |
1082 | { | |
8db324ec | 1083 | int i; |
b69fada6 | 1084 | |
8db324ec DV |
1085 | mutex_lock(&wusbhc->mutex); |
1086 | for (i = 0; i < wusbhc->ports_max; i++) { | |
1087 | if (wusbhc->port[i].wusb_dev) | |
1088 | __wusbhc_dev_disconnect(wusbhc, &wusbhc->port[i]); | |
1089 | } | |
1090 | mutex_unlock(&wusbhc->mutex); | |
1091 | ||
1092 | cancel_delayed_work_sync(&wusbhc->keep_alive_timer); | |
b69fada6 IPG |
1093 | wusbhc_mmcie_rm(wusbhc, &wusbhc->wuie_host_info->hdr); |
1094 | kfree(wusbhc->wuie_host_info); | |
1095 | wusbhc->wuie_host_info = NULL; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * wusb_set_dev_addr - set the WUSB device address used by the host | |
1100 | * @wusbhc: the WUSB HC the device is connect to | |
1101 | * @wusb_dev: the WUSB device | |
1102 | * @addr: new device address | |
1103 | */ | |
1104 | int wusb_set_dev_addr(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev, u8 addr) | |
1105 | { | |
1106 | int result; | |
1107 | ||
1108 | wusb_dev->addr = addr; | |
1109 | result = wusbhc->dev_info_set(wusbhc, wusb_dev); | |
f51c23ba | 1110 | if (result < 0) |
b69fada6 IPG |
1111 | dev_err(wusbhc->dev, "device %d: failed to set device " |
1112 | "address\n", wusb_dev->port_idx); | |
1113 | else | |
1114 | dev_info(wusbhc->dev, "device %d: %s addr %u\n", | |
1115 | wusb_dev->port_idx, | |
1116 | (addr & WUSB_DEV_ADDR_UNAUTH) ? "unauth" : "auth", | |
1117 | wusb_dev->addr); | |
1118 | ||
1119 | return result; | |
1120 | } |