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 | { | |
471e42ad | 100 | kfree(wusb_dev); |
b69fada6 IPG |
101 | } |
102 | ||
103 | static struct wusb_dev *wusb_dev_alloc(struct wusbhc *wusbhc) | |
104 | { | |
105 | struct wusb_dev *wusb_dev; | |
b69fada6 IPG |
106 | |
107 | wusb_dev = kzalloc(sizeof(*wusb_dev), GFP_KERNEL); | |
108 | if (wusb_dev == NULL) | |
109 | goto err; | |
110 | ||
111 | wusb_dev->wusbhc = wusbhc; | |
112 | ||
113 | INIT_WORK(&wusb_dev->devconnect_acked_work, wusbhc_devconnect_acked_work); | |
114 | ||
b69fada6 IPG |
115 | return wusb_dev; |
116 | err: | |
117 | wusb_dev_free(wusb_dev); | |
118 | return NULL; | |
119 | } | |
120 | ||
121 | ||
122 | /* | |
123 | * Using the Connect-Ack list, fill out the @wusbhc Connect-Ack WUSB IE | |
124 | * properly so that it can be added to the MMC. | |
125 | * | |
126 | * We just get the @wusbhc->ca_list and fill out the first four ones or | |
127 | * less (per-spec WUSB1.0[7.5, before T7-38). If the ConnectAck WUSB | |
128 | * IE is not allocated, we alloc it. | |
129 | * | |
130 | * @wusbhc->mutex must be taken | |
131 | */ | |
132 | static void wusbhc_fill_cack_ie(struct wusbhc *wusbhc) | |
133 | { | |
134 | unsigned cnt; | |
135 | struct wusb_dev *dev_itr; | |
136 | struct wuie_connect_ack *cack_ie; | |
137 | ||
138 | cack_ie = &wusbhc->cack_ie; | |
139 | cnt = 0; | |
140 | list_for_each_entry(dev_itr, &wusbhc->cack_list, cack_node) { | |
141 | cack_ie->blk[cnt].CDID = dev_itr->cdid; | |
142 | cack_ie->blk[cnt].bDeviceAddress = dev_itr->addr; | |
143 | if (++cnt >= WUIE_ELT_MAX) | |
144 | break; | |
145 | } | |
146 | cack_ie->hdr.bLength = sizeof(cack_ie->hdr) | |
147 | + cnt * sizeof(cack_ie->blk[0]); | |
148 | } | |
149 | ||
150 | /* | |
151 | * Register a new device that wants to connect | |
152 | * | |
153 | * A new device wants to connect, so we add it to the Connect-Ack | |
154 | * list. We give it an address in the unauthorized range (bit 8 set); | |
155 | * user space will have to drive authorization further on. | |
156 | * | |
157 | * @dev_addr: address to use for the device (which is also the port | |
158 | * number). | |
159 | * | |
160 | * @wusbhc->mutex must be taken | |
161 | */ | |
162 | static struct wusb_dev *wusbhc_cack_add(struct wusbhc *wusbhc, | |
163 | struct wusb_dn_connect *dnc, | |
164 | const char *pr_cdid, u8 port_idx) | |
165 | { | |
166 | struct device *dev = wusbhc->dev; | |
167 | struct wusb_dev *wusb_dev; | |
168 | int new_connection = wusb_dn_connect_new_connection(dnc); | |
169 | u8 dev_addr; | |
170 | int result; | |
171 | ||
b69fada6 IPG |
172 | /* Is it registered already? */ |
173 | list_for_each_entry(wusb_dev, &wusbhc->cack_list, cack_node) | |
174 | if (!memcmp(&wusb_dev->cdid, &dnc->CDID, | |
175 | sizeof(wusb_dev->cdid))) | |
176 | return wusb_dev; | |
177 | /* We don't have it, create an entry, register it */ | |
178 | wusb_dev = wusb_dev_alloc(wusbhc); | |
8092d7c9 | 179 | if (wusb_dev == NULL) |
b69fada6 | 180 | return NULL; |
b69fada6 IPG |
181 | wusb_dev_init(wusb_dev); |
182 | wusb_dev->cdid = dnc->CDID; | |
183 | wusb_dev->port_idx = port_idx; | |
184 | ||
185 | /* | |
186 | * Devices are always available within the cluster reservation | |
187 | * and since the hardware will take the intersection of the | |
188 | * per-device availability and the cluster reservation, the | |
189 | * per-device availability can simply be set to always | |
190 | * available. | |
191 | */ | |
192 | bitmap_fill(wusb_dev->availability.bm, UWB_NUM_MAS); | |
193 | ||
194 | /* FIXME: handle reconnects instead of assuming connects are | |
195 | always new. */ | |
196 | if (1 && new_connection == 0) | |
197 | new_connection = 1; | |
198 | if (new_connection) { | |
199 | dev_addr = (port_idx + 2) | WUSB_DEV_ADDR_UNAUTH; | |
200 | ||
201 | dev_info(dev, "Connecting new WUSB device to address %u, " | |
202 | "port %u\n", dev_addr, port_idx); | |
203 | ||
204 | result = wusb_set_dev_addr(wusbhc, wusb_dev, dev_addr); | |
f51c23ba AL |
205 | if (result < 0) |
206 | return NULL; | |
b69fada6 IPG |
207 | } |
208 | wusb_dev->entry_ts = jiffies; | |
209 | list_add_tail(&wusb_dev->cack_node, &wusbhc->cack_list); | |
210 | wusbhc->cack_count++; | |
211 | wusbhc_fill_cack_ie(wusbhc); | |
bce83697 | 212 | |
b69fada6 IPG |
213 | return wusb_dev; |
214 | } | |
215 | ||
216 | /* | |
217 | * Remove a Connect-Ack context entry from the HCs view | |
218 | * | |
219 | * @wusbhc->mutex must be taken | |
220 | */ | |
221 | static void wusbhc_cack_rm(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) | |
222 | { | |
b69fada6 IPG |
223 | list_del_init(&wusb_dev->cack_node); |
224 | wusbhc->cack_count--; | |
225 | wusbhc_fill_cack_ie(wusbhc); | |
b69fada6 IPG |
226 | } |
227 | ||
228 | /* | |
229 | * @wusbhc->mutex must be taken */ | |
230 | static | |
231 | void wusbhc_devconnect_acked(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) | |
232 | { | |
b69fada6 IPG |
233 | wusbhc_cack_rm(wusbhc, wusb_dev); |
234 | if (wusbhc->cack_count) | |
235 | wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr); | |
236 | else | |
237 | wusbhc_mmcie_rm(wusbhc, &wusbhc->cack_ie.hdr); | |
b69fada6 IPG |
238 | } |
239 | ||
240 | static void wusbhc_devconnect_acked_work(struct work_struct *work) | |
241 | { | |
242 | struct wusb_dev *wusb_dev = container_of(work, struct wusb_dev, | |
243 | devconnect_acked_work); | |
244 | struct wusbhc *wusbhc = wusb_dev->wusbhc; | |
245 | ||
246 | mutex_lock(&wusbhc->mutex); | |
247 | wusbhc_devconnect_acked(wusbhc, wusb_dev); | |
248 | mutex_unlock(&wusbhc->mutex); | |
5936ac7f DV |
249 | |
250 | wusb_dev_put(wusb_dev); | |
b69fada6 IPG |
251 | } |
252 | ||
253 | /* | |
254 | * Ack a device for connection | |
255 | * | |
256 | * FIXME: docs | |
257 | * | |
258 | * @pr_cdid: Printable CDID...hex Use @dnc->cdid for the real deal. | |
259 | * | |
260 | * So we get the connect ack IE (may have been allocated already), | |
261 | * find an empty connect block, an empty virtual port, create an | |
262 | * address with it (see below), make it an unauth addr [bit 7 set] and | |
263 | * set the MMC. | |
264 | * | |
265 | * Addresses: because WUSB hosts have no downstream hubs, we can do a | |
266 | * 1:1 mapping between 'port number' and device | |
267 | * address. This simplifies many things, as during this | |
1076e7a4 | 268 | * initial connect phase the USB stack has no knowledge of |
b69fada6 | 269 | * the device and hasn't assigned an address yet--we know |
1076e7a4 | 270 | * USB's choose_address() will use the same heuristics we |
b69fada6 IPG |
271 | * use here, so we can assume which address will be assigned. |
272 | * | |
273 | * USB stack always assigns address 1 to the root hub, so | |
274 | * to the port number we add 2 (thus virtual port #0 is | |
275 | * addr #2). | |
276 | * | |
277 | * @wusbhc shall be referenced | |
278 | */ | |
279 | static | |
280 | void wusbhc_devconnect_ack(struct wusbhc *wusbhc, struct wusb_dn_connect *dnc, | |
281 | const char *pr_cdid) | |
282 | { | |
283 | int result; | |
284 | struct device *dev = wusbhc->dev; | |
285 | struct wusb_dev *wusb_dev; | |
286 | struct wusb_port *port; | |
927c4dac | 287 | unsigned idx; |
b69fada6 | 288 | |
b69fada6 IPG |
289 | mutex_lock(&wusbhc->mutex); |
290 | ||
291 | /* Check we are not handling it already */ | |
292 | for (idx = 0; idx < wusbhc->ports_max; idx++) { | |
293 | port = wusb_port_by_idx(wusbhc, idx); | |
294 | if (port->wusb_dev | |
8092d7c9 | 295 | && memcmp(&dnc->CDID, &port->wusb_dev->cdid, sizeof(dnc->CDID)) == 0) |
b69fada6 | 296 | goto error_unlock; |
b69fada6 IPG |
297 | } |
298 | /* Look up those fake ports we have for a free one */ | |
299 | for (idx = 0; idx < wusbhc->ports_max; idx++) { | |
300 | port = wusb_port_by_idx(wusbhc, idx); | |
301 | if ((port->status & USB_PORT_STAT_POWER) | |
302 | && !(port->status & USB_PORT_STAT_CONNECTION)) | |
303 | break; | |
304 | } | |
305 | if (idx >= wusbhc->ports_max) { | |
306 | dev_err(dev, "Host controller can't connect more devices " | |
307 | "(%u already connected); device %s rejected\n", | |
308 | wusbhc->ports_max, pr_cdid); | |
309 | /* NOTE: we could send a WUIE_Disconnect here, but we haven't | |
310 | * event acked, so the device will eventually timeout the | |
311 | * connection, right? */ | |
312 | goto error_unlock; | |
313 | } | |
314 | ||
b69fada6 IPG |
315 | /* Make sure we are using no crypto on that "virtual port" */ |
316 | wusbhc->set_ptk(wusbhc, idx, 0, NULL, 0); | |
317 | ||
318 | /* Grab a filled in Connect-Ack context, fill out the | |
319 | * Connect-Ack Wireless USB IE, set the MMC */ | |
320 | wusb_dev = wusbhc_cack_add(wusbhc, dnc, pr_cdid, idx); | |
321 | if (wusb_dev == NULL) | |
322 | goto error_unlock; | |
323 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr); | |
324 | if (result < 0) | |
325 | goto error_unlock; | |
326 | /* Give the device at least 2ms (WUSB1.0[7.5.1p3]), let's do | |
327 | * three for a good measure */ | |
328 | msleep(3); | |
329 | port->wusb_dev = wusb_dev; | |
330 | port->status |= USB_PORT_STAT_CONNECTION; | |
331 | port->change |= USB_PORT_STAT_C_CONNECTION; | |
37ebb549 | 332 | /* Now the port status changed to connected; hub_wq will |
b69fada6 IPG |
333 | * pick the change up and try to reset the port to bring it to |
334 | * the enabled state--so this process returns up to the stack | |
4656d5de | 335 | * and it calls back into wusbhc_rh_port_reset(). |
b69fada6 IPG |
336 | */ |
337 | error_unlock: | |
338 | mutex_unlock(&wusbhc->mutex); | |
b69fada6 IPG |
339 | return; |
340 | ||
341 | } | |
342 | ||
343 | /* | |
344 | * Disconnect a Wireless USB device from its fake port | |
345 | * | |
37ebb549 | 346 | * Marks the port as disconnected so that hub_wq can pick up the change |
b69fada6 IPG |
347 | * and drops our knowledge about the device. |
348 | * | |
349 | * Assumes there is a device connected | |
350 | * | |
351 | * @port_index: zero based port number | |
352 | * | |
353 | * NOTE: @wusbhc->mutex is locked | |
354 | * | |
355 | * WARNING: From here it is not very safe to access anything hanging off | |
356 | * wusb_dev | |
357 | */ | |
358 | static void __wusbhc_dev_disconnect(struct wusbhc *wusbhc, | |
359 | struct wusb_port *port) | |
360 | { | |
b69fada6 IPG |
361 | struct wusb_dev *wusb_dev = port->wusb_dev; |
362 | ||
b69fada6 IPG |
363 | port->status &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE |
364 | | USB_PORT_STAT_SUSPEND | USB_PORT_STAT_RESET | |
365 | | USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED); | |
366 | port->change |= USB_PORT_STAT_C_CONNECTION | USB_PORT_STAT_C_ENABLE; | |
367 | if (wusb_dev) { | |
9a9b1d17 | 368 | dev_dbg(wusbhc->dev, "disconnecting device from port %d\n", wusb_dev->port_idx); |
b69fada6 IPG |
369 | if (!list_empty(&wusb_dev->cack_node)) |
370 | list_del_init(&wusb_dev->cack_node); | |
371 | /* For the one in cack_add() */ | |
372 | wusb_dev_put(wusb_dev); | |
373 | } | |
374 | port->wusb_dev = NULL; | |
b69fada6 IPG |
375 | |
376 | /* After a device disconnects, change the GTK (see [WUSB] | |
377 | * section 6.2.11.2). */ | |
8db324ec DV |
378 | if (wusbhc->active) |
379 | wusbhc_gtk_rekey(wusbhc); | |
b69fada6 | 380 | |
b69fada6 | 381 | /* The Wireless USB part has forgotten about the device already; now |
37ebb549 | 382 | * hub_wq's timer will pick up the disconnection and remove the USB |
b69fada6 IPG |
383 | * device from the system |
384 | */ | |
385 | } | |
386 | ||
b69fada6 IPG |
387 | /* |
388 | * Refresh the list of keep alives to emit in the MMC | |
389 | * | |
b69fada6 IPG |
390 | * We only publish the first four devices that have a coming timeout |
391 | * condition. Then when we are done processing those, we go for the | |
392 | * next ones. We ignore the ones that have timed out already (they'll | |
393 | * be purged). | |
394 | * | |
395 | * This might cause the first devices to timeout the last devices in | |
396 | * the port array...FIXME: come up with a better algorithm? | |
397 | * | |
398 | * Note we can't do much about MMC's ops errors; we hope next refresh | |
399 | * will kind of handle it. | |
400 | * | |
401 | * NOTE: @wusbhc->mutex is locked | |
402 | */ | |
403 | static void __wusbhc_keep_alive(struct wusbhc *wusbhc) | |
404 | { | |
b69fada6 IPG |
405 | struct device *dev = wusbhc->dev; |
406 | unsigned cnt; | |
407 | struct wusb_dev *wusb_dev; | |
408 | struct wusb_port *wusb_port; | |
409 | struct wuie_keep_alive *ie = &wusbhc->keep_alive_ie; | |
410 | unsigned keep_alives, old_keep_alives; | |
411 | ||
b69fada6 IPG |
412 | old_keep_alives = ie->hdr.bLength - sizeof(ie->hdr); |
413 | keep_alives = 0; | |
414 | for (cnt = 0; | |
a23b6484 | 415 | keep_alives < WUIE_ELT_MAX && cnt < wusbhc->ports_max; |
b69fada6 IPG |
416 | cnt++) { |
417 | unsigned tt = msecs_to_jiffies(wusbhc->trust_timeout); | |
418 | ||
419 | wusb_port = wusb_port_by_idx(wusbhc, cnt); | |
420 | wusb_dev = wusb_port->wusb_dev; | |
421 | ||
422 | if (wusb_dev == NULL) | |
423 | continue; | |
f4042c06 | 424 | if (wusb_dev->usb_dev == NULL) |
b69fada6 IPG |
425 | continue; |
426 | ||
427 | if (time_after(jiffies, wusb_dev->entry_ts + tt)) { | |
428 | dev_err(dev, "KEEPALIVE: device %u timed out\n", | |
429 | wusb_dev->addr); | |
430 | __wusbhc_dev_disconnect(wusbhc, wusb_port); | |
7d9852a8 TP |
431 | } else if (time_after(jiffies, wusb_dev->entry_ts + tt/3)) { |
432 | /* Approaching timeout cut off, need to refresh */ | |
b69fada6 IPG |
433 | ie->bDeviceAddress[keep_alives++] = wusb_dev->addr; |
434 | } | |
435 | } | |
436 | if (keep_alives & 0x1) /* pad to even number ([WUSB] section 7.5.9) */ | |
437 | ie->bDeviceAddress[keep_alives++] = 0x7f; | |
438 | ie->hdr.bLength = sizeof(ie->hdr) + | |
439 | keep_alives*sizeof(ie->bDeviceAddress[0]); | |
8092d7c9 DV |
440 | if (keep_alives > 0) |
441 | wusbhc_mmcie_set(wusbhc, 10, 5, &ie->hdr); | |
442 | else if (old_keep_alives != 0) | |
b69fada6 | 443 | wusbhc_mmcie_rm(wusbhc, &ie->hdr); |
b69fada6 IPG |
444 | } |
445 | ||
446 | /* | |
447 | * Do a run through all devices checking for timeouts | |
448 | */ | |
449 | static void wusbhc_keep_alive_run(struct work_struct *ws) | |
450 | { | |
bf6aede7 | 451 | struct delayed_work *dw = to_delayed_work(ws); |
56968d0c DV |
452 | struct wusbhc *wusbhc = container_of(dw, struct wusbhc, keep_alive_timer); |
453 | ||
454 | mutex_lock(&wusbhc->mutex); | |
455 | __wusbhc_keep_alive(wusbhc); | |
456 | mutex_unlock(&wusbhc->mutex); | |
457 | ||
458 | queue_delayed_work(wusbd, &wusbhc->keep_alive_timer, | |
459 | msecs_to_jiffies(wusbhc->trust_timeout / 2)); | |
b69fada6 IPG |
460 | } |
461 | ||
462 | /* | |
463 | * Find the wusb_dev from its device address. | |
464 | * | |
465 | * The device can be found directly from the address (see | |
466 | * wusb_cack_add() for where the device address is set to port_idx | |
467 | * +2), except when the address is zero. | |
468 | */ | |
469 | static struct wusb_dev *wusbhc_find_dev_by_addr(struct wusbhc *wusbhc, u8 addr) | |
470 | { | |
471 | int p; | |
472 | ||
473 | if (addr == 0xff) /* unconnected */ | |
474 | return NULL; | |
475 | ||
476 | if (addr > 0) { | |
477 | int port = (addr & ~0x80) - 2; | |
478 | if (port < 0 || port >= wusbhc->ports_max) | |
479 | return NULL; | |
480 | return wusb_port_by_idx(wusbhc, port)->wusb_dev; | |
481 | } | |
482 | ||
483 | /* Look for the device with address 0. */ | |
484 | for (p = 0; p < wusbhc->ports_max; p++) { | |
485 | struct wusb_dev *wusb_dev = wusb_port_by_idx(wusbhc, p)->wusb_dev; | |
486 | if (wusb_dev && wusb_dev->addr == addr) | |
487 | return wusb_dev; | |
488 | } | |
489 | return NULL; | |
490 | } | |
491 | ||
492 | /* | |
493 | * Handle a DN_Alive notification (WUSB1.0[7.6.1]) | |
494 | * | |
495 | * This just updates the device activity timestamp and then refreshes | |
496 | * the keep alive IE. | |
497 | * | |
498 | * @wusbhc shall be referenced and unlocked | |
499 | */ | |
6161ae5f | 500 | static void wusbhc_handle_dn_alive(struct wusbhc *wusbhc, u8 srcaddr) |
b69fada6 | 501 | { |
6161ae5f TP |
502 | struct wusb_dev *wusb_dev; |
503 | ||
b69fada6 | 504 | mutex_lock(&wusbhc->mutex); |
6161ae5f TP |
505 | wusb_dev = wusbhc_find_dev_by_addr(wusbhc, srcaddr); |
506 | if (wusb_dev == NULL) { | |
507 | dev_dbg(wusbhc->dev, "ignoring DN_Alive from unconnected device %02x\n", | |
508 | srcaddr); | |
509 | } else { | |
510 | wusb_dev->entry_ts = jiffies; | |
511 | __wusbhc_keep_alive(wusbhc); | |
512 | } | |
b69fada6 IPG |
513 | mutex_unlock(&wusbhc->mutex); |
514 | } | |
515 | ||
516 | /* | |
517 | * Handle a DN_Connect notification (WUSB1.0[7.6.1]) | |
518 | * | |
519 | * @wusbhc | |
520 | * @pkt_hdr | |
521 | * @size: Size of the buffer where the notification resides; if the | |
522 | * notification data suggests there should be more data than | |
523 | * available, an error will be signaled and the whole buffer | |
524 | * consumed. | |
525 | * | |
526 | * @wusbhc->mutex shall be held | |
527 | */ | |
528 | static void wusbhc_handle_dn_connect(struct wusbhc *wusbhc, | |
529 | struct wusb_dn_hdr *dn_hdr, | |
530 | size_t size) | |
531 | { | |
532 | struct device *dev = wusbhc->dev; | |
533 | struct wusb_dn_connect *dnc; | |
534 | char pr_cdid[WUSB_CKHDID_STRSIZE]; | |
535 | static const char *beacon_behaviour[] = { | |
536 | "reserved", | |
537 | "self-beacon", | |
538 | "directed-beacon", | |
539 | "no-beacon" | |
540 | }; | |
541 | ||
b69fada6 IPG |
542 | if (size < sizeof(*dnc)) { |
543 | dev_err(dev, "DN CONNECT: short notification (%zu < %zu)\n", | |
544 | size, sizeof(*dnc)); | |
bce83697 | 545 | return; |
b69fada6 IPG |
546 | } |
547 | ||
548 | dnc = container_of(dn_hdr, struct wusb_dn_connect, hdr); | |
549 | ckhdid_printf(pr_cdid, sizeof(pr_cdid), &dnc->CDID); | |
550 | dev_info(dev, "DN CONNECT: device %s @ %x (%s) wants to %s\n", | |
551 | pr_cdid, | |
552 | wusb_dn_connect_prev_dev_addr(dnc), | |
553 | beacon_behaviour[wusb_dn_connect_beacon_behavior(dnc)], | |
554 | wusb_dn_connect_new_connection(dnc) ? "connect" : "reconnect"); | |
555 | /* ACK the connect */ | |
556 | wusbhc_devconnect_ack(wusbhc, dnc, pr_cdid); | |
b69fada6 IPG |
557 | } |
558 | ||
559 | /* | |
560 | * Handle a DN_Disconnect notification (WUSB1.0[7.6.1]) | |
561 | * | |
562 | * Device is going down -- do the disconnect. | |
563 | * | |
564 | * @wusbhc shall be referenced and unlocked | |
565 | */ | |
6161ae5f | 566 | static void wusbhc_handle_dn_disconnect(struct wusbhc *wusbhc, u8 srcaddr) |
b69fada6 IPG |
567 | { |
568 | struct device *dev = wusbhc->dev; | |
6161ae5f | 569 | struct wusb_dev *wusb_dev; |
b69fada6 IPG |
570 | |
571 | mutex_lock(&wusbhc->mutex); | |
6161ae5f TP |
572 | wusb_dev = wusbhc_find_dev_by_addr(wusbhc, srcaddr); |
573 | if (wusb_dev == NULL) { | |
574 | dev_dbg(dev, "ignoring DN DISCONNECT from unconnected device %02x\n", | |
575 | srcaddr); | |
576 | } else { | |
577 | dev_info(dev, "DN DISCONNECT: device 0x%02x going down\n", | |
578 | wusb_dev->addr); | |
579 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, | |
580 | wusb_dev->port_idx)); | |
581 | } | |
b69fada6 IPG |
582 | mutex_unlock(&wusbhc->mutex); |
583 | } | |
584 | ||
b69fada6 IPG |
585 | /* |
586 | * Handle a Device Notification coming a host | |
587 | * | |
588 | * The Device Notification comes from a host (HWA, DWA or WHCI) | |
589 | * wrapped in a set of headers. Somebody else has peeled off those | |
590 | * headers for us and we just get one Device Notifications. | |
591 | * | |
592 | * Invalid DNs (e.g., too short) are discarded. | |
593 | * | |
594 | * @wusbhc shall be referenced | |
595 | * | |
596 | * FIXMES: | |
597 | * - implement priorities as in WUSB1.0[Table 7-55]? | |
598 | */ | |
599 | void wusbhc_handle_dn(struct wusbhc *wusbhc, u8 srcaddr, | |
600 | struct wusb_dn_hdr *dn_hdr, size_t size) | |
601 | { | |
602 | struct device *dev = wusbhc->dev; | |
b69fada6 | 603 | |
b69fada6 IPG |
604 | if (size < sizeof(struct wusb_dn_hdr)) { |
605 | dev_err(dev, "DN data shorter than DN header (%d < %d)\n", | |
606 | (int)size, (int)sizeof(struct wusb_dn_hdr)); | |
bce83697 | 607 | return; |
b69fada6 | 608 | } |
b69fada6 IPG |
609 | switch (dn_hdr->bType) { |
610 | case WUSB_DN_CONNECT: | |
611 | wusbhc_handle_dn_connect(wusbhc, dn_hdr, size); | |
612 | break; | |
613 | case WUSB_DN_ALIVE: | |
6161ae5f | 614 | wusbhc_handle_dn_alive(wusbhc, srcaddr); |
b69fada6 IPG |
615 | break; |
616 | case WUSB_DN_DISCONNECT: | |
6161ae5f | 617 | wusbhc_handle_dn_disconnect(wusbhc, srcaddr); |
b69fada6 IPG |
618 | break; |
619 | case WUSB_DN_MASAVAILCHANGED: | |
620 | case WUSB_DN_RWAKE: | |
621 | case WUSB_DN_SLEEP: | |
622 | /* FIXME: handle these DNs. */ | |
623 | break; | |
624 | case WUSB_DN_EPRDY: | |
625 | /* The hardware handles these. */ | |
626 | break; | |
627 | default: | |
628 | dev_warn(dev, "unknown DN %u (%d octets) from %u\n", | |
629 | dn_hdr->bType, (int)size, srcaddr); | |
630 | } | |
b69fada6 IPG |
631 | } |
632 | EXPORT_SYMBOL_GPL(wusbhc_handle_dn); | |
633 | ||
634 | /* | |
635 | * Disconnect a WUSB device from a the cluster | |
636 | * | |
637 | * @wusbhc | |
638 | * @port Fake port where the device is (wusbhc index, not USB port number). | |
639 | * | |
640 | * In Wireless USB, a disconnect is basically telling the device he is | |
641 | * being disconnected and forgetting about him. | |
642 | * | |
643 | * We send the device a Device Disconnect IE (WUSB1.0[7.5.11]) for 100 | |
644 | * ms and then keep going. | |
645 | * | |
646 | * We don't do much in case of error; we always pretend we disabled | |
647 | * the port and disconnected the device. If physically the request | |
648 | * didn't get there (many things can fail in the way there), the stack | |
649 | * will reject the device's communication attempts. | |
650 | * | |
651 | * @wusbhc should be refcounted and locked | |
652 | */ | |
653 | void __wusbhc_dev_disable(struct wusbhc *wusbhc, u8 port_idx) | |
654 | { | |
655 | int result; | |
656 | struct device *dev = wusbhc->dev; | |
657 | struct wusb_dev *wusb_dev; | |
658 | struct wuie_disconnect *ie; | |
659 | ||
b69fada6 IPG |
660 | wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev; |
661 | if (wusb_dev == NULL) { | |
662 | /* reset no device? ignore */ | |
663 | dev_dbg(dev, "DISCONNECT: no device at port %u, ignoring\n", | |
664 | port_idx); | |
bce83697 | 665 | return; |
b69fada6 IPG |
666 | } |
667 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx)); | |
668 | ||
b69fada6 IPG |
669 | ie = kzalloc(sizeof(*ie), GFP_KERNEL); |
670 | if (ie == NULL) | |
bce83697 | 671 | return; |
b69fada6 IPG |
672 | ie->hdr.bLength = sizeof(*ie); |
673 | ie->hdr.bIEIdentifier = WUIE_ID_DEVICE_DISCONNECT; | |
674 | ie->bDeviceAddress = wusb_dev->addr; | |
675 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &ie->hdr); | |
bce83697 | 676 | if (result < 0) |
b69fada6 | 677 | dev_err(dev, "DISCONNECT: can't set MMC: %d\n", result); |
bce83697 DV |
678 | else { |
679 | /* At least 6 MMCs, assuming at least 1 MMC per zone. */ | |
680 | msleep(7*4); | |
681 | wusbhc_mmcie_rm(wusbhc, &ie->hdr); | |
b69fada6 | 682 | } |
b69fada6 | 683 | kfree(ie); |
b69fada6 IPG |
684 | } |
685 | ||
686 | /* | |
687 | * Walk over the BOS descriptor, verify and grok it | |
688 | * | |
689 | * @usb_dev: referenced | |
690 | * @wusb_dev: referenced and unlocked | |
691 | * | |
692 | * The BOS descriptor is defined at WUSB1.0[7.4.1], and it defines a | |
693 | * "flexible" way to wrap all kinds of descriptors inside an standard | |
694 | * descriptor (wonder why they didn't use normal descriptors, | |
695 | * btw). Not like they lack code. | |
696 | * | |
697 | * At the end we go to look for the WUSB Device Capabilities | |
698 | * (WUSB1.0[7.4.1.1]) that is wrapped in a device capability descriptor | |
699 | * that is part of the BOS descriptor set. That tells us what does the | |
700 | * device support (dual role, beacon type, UWB PHY rates). | |
701 | */ | |
702 | static int wusb_dev_bos_grok(struct usb_device *usb_dev, | |
703 | struct wusb_dev *wusb_dev, | |
704 | struct usb_bos_descriptor *bos, size_t desc_size) | |
705 | { | |
706 | ssize_t result; | |
707 | struct device *dev = &usb_dev->dev; | |
708 | void *itr, *top; | |
709 | ||
710 | /* Walk over BOS capabilities, verify them */ | |
711 | itr = (void *)bos + sizeof(*bos); | |
712 | top = itr + desc_size - sizeof(*bos); | |
713 | while (itr < top) { | |
714 | struct usb_dev_cap_header *cap_hdr = itr; | |
715 | size_t cap_size; | |
716 | u8 cap_type; | |
717 | if (top - itr < sizeof(*cap_hdr)) { | |
718 | dev_err(dev, "Device BUG? premature end of BOS header " | |
719 | "data [offset 0x%02x]: only %zu bytes left\n", | |
720 | (int)(itr - (void *)bos), top - itr); | |
721 | result = -ENOSPC; | |
722 | goto error_bad_cap; | |
723 | } | |
724 | cap_size = cap_hdr->bLength; | |
725 | cap_type = cap_hdr->bDevCapabilityType; | |
b69fada6 IPG |
726 | if (cap_size == 0) |
727 | break; | |
728 | if (cap_size > top - itr) { | |
729 | dev_err(dev, "Device BUG? premature end of BOS data " | |
730 | "[offset 0x%02x cap %02x %zu bytes]: " | |
731 | "only %zu bytes left\n", | |
732 | (int)(itr - (void *)bos), | |
733 | cap_type, cap_size, top - itr); | |
734 | result = -EBADF; | |
735 | goto error_bad_cap; | |
736 | } | |
b69fada6 IPG |
737 | switch (cap_type) { |
738 | case USB_CAP_TYPE_WIRELESS_USB: | |
739 | if (cap_size != sizeof(*wusb_dev->wusb_cap_descr)) | |
740 | dev_err(dev, "Device BUG? WUSB Capability " | |
741 | "descriptor is %zu bytes vs %zu " | |
742 | "needed\n", cap_size, | |
743 | sizeof(*wusb_dev->wusb_cap_descr)); | |
bce83697 | 744 | else |
b69fada6 | 745 | wusb_dev->wusb_cap_descr = itr; |
b69fada6 IPG |
746 | break; |
747 | default: | |
748 | dev_err(dev, "BUG? Unknown BOS capability 0x%02x " | |
749 | "(%zu bytes) at offset 0x%02x\n", cap_type, | |
750 | cap_size, (int)(itr - (void *)bos)); | |
751 | } | |
752 | itr += cap_size; | |
753 | } | |
754 | result = 0; | |
755 | error_bad_cap: | |
756 | return result; | |
757 | } | |
758 | ||
759 | /* | |
760 | * Add information from the BOS descriptors to the device | |
761 | * | |
762 | * @usb_dev: referenced | |
763 | * @wusb_dev: referenced and unlocked | |
764 | * | |
765 | * So what we do is we alloc a space for the BOS descriptor of 64 | |
766 | * bytes; read the first four bytes which include the wTotalLength | |
767 | * field (WUSB1.0[T7-26]) and if it fits in those 64 bytes, read the | |
768 | * whole thing. If not we realloc to that size. | |
769 | * | |
770 | * Then we call the groking function, that will fill up | |
771 | * wusb_dev->wusb_cap_descr, which is what we'll need later on. | |
772 | */ | |
773 | static int wusb_dev_bos_add(struct usb_device *usb_dev, | |
774 | struct wusb_dev *wusb_dev) | |
775 | { | |
776 | ssize_t result; | |
777 | struct device *dev = &usb_dev->dev; | |
778 | struct usb_bos_descriptor *bos; | |
779 | size_t alloc_size = 32, desc_size = 4; | |
780 | ||
781 | bos = kmalloc(alloc_size, GFP_KERNEL); | |
782 | if (bos == NULL) | |
783 | return -ENOMEM; | |
784 | result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size); | |
785 | if (result < 4) { | |
786 | dev_err(dev, "Can't get BOS descriptor or too short: %zd\n", | |
787 | result); | |
788 | goto error_get_descriptor; | |
789 | } | |
790 | desc_size = le16_to_cpu(bos->wTotalLength); | |
791 | if (desc_size >= alloc_size) { | |
792 | kfree(bos); | |
793 | alloc_size = desc_size; | |
794 | bos = kmalloc(alloc_size, GFP_KERNEL); | |
795 | if (bos == NULL) | |
796 | return -ENOMEM; | |
797 | } | |
798 | result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size); | |
799 | if (result < 0 || result != desc_size) { | |
800 | dev_err(dev, "Can't get BOS descriptor or too short (need " | |
801 | "%zu bytes): %zd\n", desc_size, result); | |
802 | goto error_get_descriptor; | |
803 | } | |
804 | if (result < sizeof(*bos) | |
805 | || le16_to_cpu(bos->wTotalLength) != desc_size) { | |
806 | dev_err(dev, "Can't get BOS descriptor or too short (need " | |
807 | "%zu bytes): %zd\n", desc_size, result); | |
808 | goto error_get_descriptor; | |
809 | } | |
bce83697 | 810 | |
b69fada6 IPG |
811 | result = wusb_dev_bos_grok(usb_dev, wusb_dev, bos, result); |
812 | if (result < 0) | |
813 | goto error_bad_bos; | |
814 | wusb_dev->bos = bos; | |
815 | return 0; | |
816 | ||
817 | error_bad_bos: | |
818 | error_get_descriptor: | |
819 | kfree(bos); | |
820 | wusb_dev->wusb_cap_descr = NULL; | |
821 | return result; | |
822 | } | |
823 | ||
824 | static void wusb_dev_bos_rm(struct wusb_dev *wusb_dev) | |
825 | { | |
826 | kfree(wusb_dev->bos); | |
827 | wusb_dev->wusb_cap_descr = NULL; | |
828 | }; | |
829 | ||
b69fada6 IPG |
830 | /* |
831 | * USB stack's device addition Notifier Callback | |
832 | * | |
833 | * Called from drivers/usb/core/hub.c when a new device is added; we | |
834 | * use this hook to perform certain WUSB specific setup work on the | |
835 | * new device. As well, it is the first time we can connect the | |
836 | * wusb_dev and the usb_dev. So we note it down in wusb_dev and take a | |
837 | * reference that we'll drop. | |
838 | * | |
839 | * First we need to determine if the device is a WUSB device (else we | |
551cdbbe | 840 | * ignore it). For that we use the speed setting (USB_SPEED_WIRELESS) |
b69fada6 IPG |
841 | * [FIXME: maybe we'd need something more definitive]. If so, we track |
842 | * it's usb_busd and from there, the WUSB HC. | |
843 | * | |
844 | * Because all WUSB HCs are contained in a 'struct wusbhc', voila, we | |
845 | * get the wusbhc for the device. | |
846 | * | |
847 | * We have a reference on @usb_dev (as we are called at the end of its | |
848 | * enumeration). | |
849 | * | |
850 | * NOTE: @usb_dev locked | |
851 | */ | |
852 | static void wusb_dev_add_ncb(struct usb_device *usb_dev) | |
853 | { | |
854 | int result = 0; | |
855 | struct wusb_dev *wusb_dev; | |
856 | struct wusbhc *wusbhc; | |
857 | struct device *dev = &usb_dev->dev; | |
858 | u8 port_idx; | |
859 | ||
860 | if (usb_dev->wusb == 0 || usb_dev->devnum == 1) | |
861 | return; /* skip non wusb and wusb RHs */ | |
862 | ||
6da9c990 DV |
863 | usb_set_device_state(usb_dev, USB_STATE_UNAUTHENTICATED); |
864 | ||
b69fada6 IPG |
865 | wusbhc = wusbhc_get_by_usb_dev(usb_dev); |
866 | if (wusbhc == NULL) | |
867 | goto error_nodev; | |
868 | mutex_lock(&wusbhc->mutex); | |
869 | wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, usb_dev); | |
870 | port_idx = wusb_port_no_to_idx(usb_dev->portnum); | |
871 | mutex_unlock(&wusbhc->mutex); | |
872 | if (wusb_dev == NULL) | |
873 | goto error_nodev; | |
874 | wusb_dev->usb_dev = usb_get_dev(usb_dev); | |
875 | usb_dev->wusb_dev = wusb_dev_get(wusb_dev); | |
876 | result = wusb_dev_sec_add(wusbhc, usb_dev, wusb_dev); | |
877 | if (result < 0) { | |
878 | dev_err(dev, "Cannot enable security: %d\n", result); | |
879 | goto error_sec_add; | |
880 | } | |
881 | /* Now query the device for it's BOS and attach it to wusb_dev */ | |
882 | result = wusb_dev_bos_add(usb_dev, wusb_dev); | |
883 | if (result < 0) { | |
884 | dev_err(dev, "Cannot get BOS descriptors: %d\n", result); | |
885 | goto error_bos_add; | |
886 | } | |
887 | result = wusb_dev_sysfs_add(wusbhc, usb_dev, wusb_dev); | |
888 | if (result < 0) | |
889 | goto error_add_sysfs; | |
890 | out: | |
891 | wusb_dev_put(wusb_dev); | |
892 | wusbhc_put(wusbhc); | |
893 | error_nodev: | |
b69fada6 IPG |
894 | return; |
895 | ||
896 | wusb_dev_sysfs_rm(wusb_dev); | |
897 | error_add_sysfs: | |
898 | wusb_dev_bos_rm(wusb_dev); | |
899 | error_bos_add: | |
900 | wusb_dev_sec_rm(wusb_dev); | |
901 | error_sec_add: | |
902 | mutex_lock(&wusbhc->mutex); | |
903 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx)); | |
904 | mutex_unlock(&wusbhc->mutex); | |
905 | goto out; | |
906 | } | |
907 | ||
908 | /* | |
909 | * Undo all the steps done at connection by the notifier callback | |
910 | * | |
911 | * NOTE: @usb_dev locked | |
912 | */ | |
913 | static void wusb_dev_rm_ncb(struct usb_device *usb_dev) | |
914 | { | |
915 | struct wusb_dev *wusb_dev = usb_dev->wusb_dev; | |
916 | ||
917 | if (usb_dev->wusb == 0 || usb_dev->devnum == 1) | |
918 | return; /* skip non wusb and wusb RHs */ | |
919 | ||
920 | wusb_dev_sysfs_rm(wusb_dev); | |
921 | wusb_dev_bos_rm(wusb_dev); | |
922 | wusb_dev_sec_rm(wusb_dev); | |
923 | wusb_dev->usb_dev = NULL; | |
924 | usb_dev->wusb_dev = NULL; | |
925 | wusb_dev_put(wusb_dev); | |
926 | usb_put_dev(usb_dev); | |
927 | } | |
928 | ||
929 | /* | |
930 | * Handle notifications from the USB stack (notifier call back) | |
931 | * | |
932 | * This is called when the USB stack does a | |
933 | * usb_{bus,device}_{add,remove}() so we can do WUSB specific | |
934 | * handling. It is called with [for the case of | |
935 | * USB_DEVICE_{ADD,REMOVE} with the usb_dev locked. | |
936 | */ | |
937 | int wusb_usb_ncb(struct notifier_block *nb, unsigned long val, | |
938 | void *priv) | |
939 | { | |
940 | int result = NOTIFY_OK; | |
941 | ||
942 | switch (val) { | |
943 | case USB_DEVICE_ADD: | |
944 | wusb_dev_add_ncb(priv); | |
945 | break; | |
946 | case USB_DEVICE_REMOVE: | |
947 | wusb_dev_rm_ncb(priv); | |
948 | break; | |
949 | case USB_BUS_ADD: | |
950 | /* ignore (for now) */ | |
951 | case USB_BUS_REMOVE: | |
952 | break; | |
953 | default: | |
954 | WARN_ON(1); | |
955 | result = NOTIFY_BAD; | |
2b84f92b | 956 | } |
b69fada6 IPG |
957 | return result; |
958 | } | |
959 | ||
960 | /* | |
961 | * Return a referenced wusb_dev given a @wusbhc and @usb_dev | |
962 | */ | |
963 | struct wusb_dev *__wusb_dev_get_by_usb_dev(struct wusbhc *wusbhc, | |
964 | struct usb_device *usb_dev) | |
965 | { | |
966 | struct wusb_dev *wusb_dev; | |
967 | u8 port_idx; | |
968 | ||
969 | port_idx = wusb_port_no_to_idx(usb_dev->portnum); | |
970 | BUG_ON(port_idx > wusbhc->ports_max); | |
971 | wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev; | |
972 | if (wusb_dev != NULL) /* ops, device is gone */ | |
973 | wusb_dev_get(wusb_dev); | |
974 | return wusb_dev; | |
975 | } | |
976 | EXPORT_SYMBOL_GPL(__wusb_dev_get_by_usb_dev); | |
977 | ||
978 | void wusb_dev_destroy(struct kref *_wusb_dev) | |
979 | { | |
bce83697 DV |
980 | struct wusb_dev *wusb_dev = container_of(_wusb_dev, struct wusb_dev, refcnt); |
981 | ||
b69fada6 IPG |
982 | list_del_init(&wusb_dev->cack_node); |
983 | wusb_dev_free(wusb_dev); | |
b69fada6 IPG |
984 | } |
985 | EXPORT_SYMBOL_GPL(wusb_dev_destroy); | |
986 | ||
987 | /* | |
988 | * Create all the device connect handling infrastructure | |
989 | * | |
990 | * This is basically the device info array, Connect Acknowledgement | |
991 | * (cack) lists, keep-alive timers (and delayed work thread). | |
992 | */ | |
993 | int wusbhc_devconnect_create(struct wusbhc *wusbhc) | |
994 | { | |
b69fada6 IPG |
995 | wusbhc->keep_alive_ie.hdr.bIEIdentifier = WUIE_ID_KEEP_ALIVE; |
996 | wusbhc->keep_alive_ie.hdr.bLength = sizeof(wusbhc->keep_alive_ie.hdr); | |
997 | INIT_DELAYED_WORK(&wusbhc->keep_alive_timer, wusbhc_keep_alive_run); | |
998 | ||
999 | wusbhc->cack_ie.hdr.bIEIdentifier = WUIE_ID_CONNECTACK; | |
1000 | wusbhc->cack_ie.hdr.bLength = sizeof(wusbhc->cack_ie.hdr); | |
1001 | INIT_LIST_HEAD(&wusbhc->cack_list); | |
1002 | ||
b69fada6 IPG |
1003 | return 0; |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Release all resources taken by the devconnect stuff | |
1008 | */ | |
1009 | void wusbhc_devconnect_destroy(struct wusbhc *wusbhc) | |
1010 | { | |
bce83697 | 1011 | /* no op */ |
b69fada6 IPG |
1012 | } |
1013 | ||
1014 | /* | |
1015 | * wusbhc_devconnect_start - start accepting device connections | |
1016 | * @wusbhc: the WUSB HC | |
1017 | * | |
1018 | * Sets the Host Info IE to accept all new connections. | |
1019 | * | |
1020 | * FIXME: This also enables the keep alives but this is not necessary | |
1021 | * until there are connected and authenticated devices. | |
1022 | */ | |
6fae35f9 | 1023 | int wusbhc_devconnect_start(struct wusbhc *wusbhc) |
b69fada6 IPG |
1024 | { |
1025 | struct device *dev = wusbhc->dev; | |
1026 | struct wuie_host_info *hi; | |
1027 | int result; | |
1028 | ||
1029 | hi = kzalloc(sizeof(*hi), GFP_KERNEL); | |
1030 | if (hi == NULL) | |
1031 | return -ENOMEM; | |
1032 | ||
1033 | hi->hdr.bLength = sizeof(*hi); | |
1034 | hi->hdr.bIEIdentifier = WUIE_ID_HOST_INFO; | |
1035 | hi->attributes = cpu_to_le16((wusbhc->rsv->stream << 3) | WUIE_HI_CAP_ALL); | |
6fae35f9 | 1036 | hi->CHID = wusbhc->chid; |
b69fada6 IPG |
1037 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &hi->hdr); |
1038 | if (result < 0) { | |
1039 | dev_err(dev, "Cannot add Host Info MMCIE: %d\n", result); | |
1040 | goto error_mmcie_set; | |
1041 | } | |
1042 | wusbhc->wuie_host_info = hi; | |
1043 | ||
1044 | queue_delayed_work(wusbd, &wusbhc->keep_alive_timer, | |
7d9852a8 | 1045 | msecs_to_jiffies(wusbhc->trust_timeout / 2)); |
b69fada6 IPG |
1046 | |
1047 | return 0; | |
1048 | ||
1049 | error_mmcie_set: | |
1050 | kfree(hi); | |
1051 | return result; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * wusbhc_devconnect_stop - stop managing connected devices | |
1056 | * @wusbhc: the WUSB HC | |
1057 | * | |
8db324ec DV |
1058 | * Disconnects any devices still connected, stops the keep alives and |
1059 | * removes the Host Info IE. | |
b69fada6 IPG |
1060 | */ |
1061 | void wusbhc_devconnect_stop(struct wusbhc *wusbhc) | |
1062 | { | |
8db324ec | 1063 | int i; |
b69fada6 | 1064 | |
8db324ec DV |
1065 | mutex_lock(&wusbhc->mutex); |
1066 | for (i = 0; i < wusbhc->ports_max; i++) { | |
1067 | if (wusbhc->port[i].wusb_dev) | |
1068 | __wusbhc_dev_disconnect(wusbhc, &wusbhc->port[i]); | |
1069 | } | |
1070 | mutex_unlock(&wusbhc->mutex); | |
1071 | ||
1072 | cancel_delayed_work_sync(&wusbhc->keep_alive_timer); | |
b69fada6 IPG |
1073 | wusbhc_mmcie_rm(wusbhc, &wusbhc->wuie_host_info->hdr); |
1074 | kfree(wusbhc->wuie_host_info); | |
1075 | wusbhc->wuie_host_info = NULL; | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * wusb_set_dev_addr - set the WUSB device address used by the host | |
1080 | * @wusbhc: the WUSB HC the device is connect to | |
1081 | * @wusb_dev: the WUSB device | |
1082 | * @addr: new device address | |
1083 | */ | |
1084 | int wusb_set_dev_addr(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev, u8 addr) | |
1085 | { | |
1086 | int result; | |
1087 | ||
1088 | wusb_dev->addr = addr; | |
1089 | result = wusbhc->dev_info_set(wusbhc, wusb_dev); | |
f51c23ba | 1090 | if (result < 0) |
b69fada6 IPG |
1091 | dev_err(wusbhc->dev, "device %d: failed to set device " |
1092 | "address\n", wusb_dev->port_idx); | |
1093 | else | |
1094 | dev_info(wusbhc->dev, "device %d: %s addr %u\n", | |
1095 | wusb_dev->port_idx, | |
1096 | (addr & WUSB_DEV_ADDR_UNAUTH) ? "unauth" : "auth", | |
1097 | wusb_dev->addr); | |
1098 | ||
1099 | return result; | |
1100 | } |