Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 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 | * |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 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 | * |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 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> |
| 91 | #include <linux/workqueue.h> |
| 92 | #include "wusbhc.h" |
| 93 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 94 | static void wusbhc_devconnect_acked_work(struct work_struct *work); |
| 95 | |
| 96 | static void wusb_dev_free(struct wusb_dev *wusb_dev) |
| 97 | { |
| 98 | if (wusb_dev) { |
| 99 | kfree(wusb_dev->set_gtk_req); |
| 100 | usb_free_urb(wusb_dev->set_gtk_urb); |
| 101 | kfree(wusb_dev); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | static struct wusb_dev *wusb_dev_alloc(struct wusbhc *wusbhc) |
| 106 | { |
| 107 | struct wusb_dev *wusb_dev; |
| 108 | struct urb *urb; |
| 109 | struct usb_ctrlrequest *req; |
| 110 | |
| 111 | wusb_dev = kzalloc(sizeof(*wusb_dev), GFP_KERNEL); |
| 112 | if (wusb_dev == NULL) |
| 113 | goto err; |
| 114 | |
| 115 | wusb_dev->wusbhc = wusbhc; |
| 116 | |
| 117 | INIT_WORK(&wusb_dev->devconnect_acked_work, wusbhc_devconnect_acked_work); |
| 118 | |
| 119 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 120 | if (urb == NULL) |
| 121 | goto err; |
| 122 | |
| 123 | req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
| 124 | if (req == NULL) |
| 125 | goto err; |
| 126 | |
| 127 | req->bRequestType = USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE; |
| 128 | req->bRequest = USB_REQ_SET_DESCRIPTOR; |
| 129 | req->wValue = cpu_to_le16(USB_DT_KEY << 8 | wusbhc->gtk_index); |
| 130 | req->wIndex = 0; |
| 131 | req->wLength = cpu_to_le16(wusbhc->gtk.descr.bLength); |
| 132 | |
| 133 | wusb_dev->set_gtk_urb = urb; |
| 134 | wusb_dev->set_gtk_req = req; |
| 135 | |
| 136 | return wusb_dev; |
| 137 | err: |
| 138 | wusb_dev_free(wusb_dev); |
| 139 | return NULL; |
| 140 | } |
| 141 | |
| 142 | |
| 143 | /* |
| 144 | * Using the Connect-Ack list, fill out the @wusbhc Connect-Ack WUSB IE |
| 145 | * properly so that it can be added to the MMC. |
| 146 | * |
| 147 | * We just get the @wusbhc->ca_list and fill out the first four ones or |
| 148 | * less (per-spec WUSB1.0[7.5, before T7-38). If the ConnectAck WUSB |
| 149 | * IE is not allocated, we alloc it. |
| 150 | * |
| 151 | * @wusbhc->mutex must be taken |
| 152 | */ |
| 153 | static void wusbhc_fill_cack_ie(struct wusbhc *wusbhc) |
| 154 | { |
| 155 | unsigned cnt; |
| 156 | struct wusb_dev *dev_itr; |
| 157 | struct wuie_connect_ack *cack_ie; |
| 158 | |
| 159 | cack_ie = &wusbhc->cack_ie; |
| 160 | cnt = 0; |
| 161 | list_for_each_entry(dev_itr, &wusbhc->cack_list, cack_node) { |
| 162 | cack_ie->blk[cnt].CDID = dev_itr->cdid; |
| 163 | cack_ie->blk[cnt].bDeviceAddress = dev_itr->addr; |
| 164 | if (++cnt >= WUIE_ELT_MAX) |
| 165 | break; |
| 166 | } |
| 167 | cack_ie->hdr.bLength = sizeof(cack_ie->hdr) |
| 168 | + cnt * sizeof(cack_ie->blk[0]); |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Register a new device that wants to connect |
| 173 | * |
| 174 | * A new device wants to connect, so we add it to the Connect-Ack |
| 175 | * list. We give it an address in the unauthorized range (bit 8 set); |
| 176 | * user space will have to drive authorization further on. |
| 177 | * |
| 178 | * @dev_addr: address to use for the device (which is also the port |
| 179 | * number). |
| 180 | * |
| 181 | * @wusbhc->mutex must be taken |
| 182 | */ |
| 183 | static struct wusb_dev *wusbhc_cack_add(struct wusbhc *wusbhc, |
| 184 | struct wusb_dn_connect *dnc, |
| 185 | const char *pr_cdid, u8 port_idx) |
| 186 | { |
| 187 | struct device *dev = wusbhc->dev; |
| 188 | struct wusb_dev *wusb_dev; |
| 189 | int new_connection = wusb_dn_connect_new_connection(dnc); |
| 190 | u8 dev_addr; |
| 191 | int result; |
| 192 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 193 | /* Is it registered already? */ |
| 194 | list_for_each_entry(wusb_dev, &wusbhc->cack_list, cack_node) |
| 195 | if (!memcmp(&wusb_dev->cdid, &dnc->CDID, |
| 196 | sizeof(wusb_dev->cdid))) |
| 197 | return wusb_dev; |
| 198 | /* We don't have it, create an entry, register it */ |
| 199 | wusb_dev = wusb_dev_alloc(wusbhc); |
David Vrabel | 8092d7c | 2008-10-16 13:56:53 +0100 | [diff] [blame] | 200 | if (wusb_dev == NULL) |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 201 | return NULL; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 202 | wusb_dev_init(wusb_dev); |
| 203 | wusb_dev->cdid = dnc->CDID; |
| 204 | wusb_dev->port_idx = port_idx; |
| 205 | |
| 206 | /* |
| 207 | * Devices are always available within the cluster reservation |
| 208 | * and since the hardware will take the intersection of the |
| 209 | * per-device availability and the cluster reservation, the |
| 210 | * per-device availability can simply be set to always |
| 211 | * available. |
| 212 | */ |
| 213 | bitmap_fill(wusb_dev->availability.bm, UWB_NUM_MAS); |
| 214 | |
| 215 | /* FIXME: handle reconnects instead of assuming connects are |
| 216 | always new. */ |
| 217 | if (1 && new_connection == 0) |
| 218 | new_connection = 1; |
| 219 | if (new_connection) { |
| 220 | dev_addr = (port_idx + 2) | WUSB_DEV_ADDR_UNAUTH; |
| 221 | |
| 222 | dev_info(dev, "Connecting new WUSB device to address %u, " |
| 223 | "port %u\n", dev_addr, port_idx); |
| 224 | |
| 225 | result = wusb_set_dev_addr(wusbhc, wusb_dev, dev_addr); |
Anderson Lizardo | f51c23b | 2008-09-17 16:34:31 +0100 | [diff] [blame] | 226 | if (result < 0) |
| 227 | return NULL; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 228 | } |
| 229 | wusb_dev->entry_ts = jiffies; |
| 230 | list_add_tail(&wusb_dev->cack_node, &wusbhc->cack_list); |
| 231 | wusbhc->cack_count++; |
| 232 | wusbhc_fill_cack_ie(wusbhc); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 233 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 234 | return wusb_dev; |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * Remove a Connect-Ack context entry from the HCs view |
| 239 | * |
| 240 | * @wusbhc->mutex must be taken |
| 241 | */ |
| 242 | static void wusbhc_cack_rm(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) |
| 243 | { |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 244 | list_del_init(&wusb_dev->cack_node); |
| 245 | wusbhc->cack_count--; |
| 246 | wusbhc_fill_cack_ie(wusbhc); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | /* |
| 250 | * @wusbhc->mutex must be taken */ |
| 251 | static |
| 252 | void wusbhc_devconnect_acked(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) |
| 253 | { |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 254 | wusbhc_cack_rm(wusbhc, wusb_dev); |
| 255 | if (wusbhc->cack_count) |
| 256 | wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr); |
| 257 | else |
| 258 | wusbhc_mmcie_rm(wusbhc, &wusbhc->cack_ie.hdr); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | static void wusbhc_devconnect_acked_work(struct work_struct *work) |
| 262 | { |
| 263 | struct wusb_dev *wusb_dev = container_of(work, struct wusb_dev, |
| 264 | devconnect_acked_work); |
| 265 | struct wusbhc *wusbhc = wusb_dev->wusbhc; |
| 266 | |
| 267 | mutex_lock(&wusbhc->mutex); |
| 268 | wusbhc_devconnect_acked(wusbhc, wusb_dev); |
| 269 | mutex_unlock(&wusbhc->mutex); |
| 270 | } |
| 271 | |
| 272 | /* |
| 273 | * Ack a device for connection |
| 274 | * |
| 275 | * FIXME: docs |
| 276 | * |
| 277 | * @pr_cdid: Printable CDID...hex Use @dnc->cdid for the real deal. |
| 278 | * |
| 279 | * So we get the connect ack IE (may have been allocated already), |
| 280 | * find an empty connect block, an empty virtual port, create an |
| 281 | * address with it (see below), make it an unauth addr [bit 7 set] and |
| 282 | * set the MMC. |
| 283 | * |
| 284 | * Addresses: because WUSB hosts have no downstream hubs, we can do a |
| 285 | * 1:1 mapping between 'port number' and device |
| 286 | * address. This simplifies many things, as during this |
| 287 | * initial connect phase the USB stack has no knoledge of |
| 288 | * the device and hasn't assigned an address yet--we know |
| 289 | * USB's choose_address() will use the same euristics we |
| 290 | * use here, so we can assume which address will be assigned. |
| 291 | * |
| 292 | * USB stack always assigns address 1 to the root hub, so |
| 293 | * to the port number we add 2 (thus virtual port #0 is |
| 294 | * addr #2). |
| 295 | * |
| 296 | * @wusbhc shall be referenced |
| 297 | */ |
| 298 | static |
| 299 | void wusbhc_devconnect_ack(struct wusbhc *wusbhc, struct wusb_dn_connect *dnc, |
| 300 | const char *pr_cdid) |
| 301 | { |
| 302 | int result; |
| 303 | struct device *dev = wusbhc->dev; |
| 304 | struct wusb_dev *wusb_dev; |
| 305 | struct wusb_port *port; |
| 306 | unsigned idx, devnum; |
| 307 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 308 | mutex_lock(&wusbhc->mutex); |
| 309 | |
| 310 | /* Check we are not handling it already */ |
| 311 | for (idx = 0; idx < wusbhc->ports_max; idx++) { |
| 312 | port = wusb_port_by_idx(wusbhc, idx); |
| 313 | if (port->wusb_dev |
David Vrabel | 8092d7c | 2008-10-16 13:56:53 +0100 | [diff] [blame] | 314 | && memcmp(&dnc->CDID, &port->wusb_dev->cdid, sizeof(dnc->CDID)) == 0) |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 315 | goto error_unlock; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 316 | } |
| 317 | /* Look up those fake ports we have for a free one */ |
| 318 | for (idx = 0; idx < wusbhc->ports_max; idx++) { |
| 319 | port = wusb_port_by_idx(wusbhc, idx); |
| 320 | if ((port->status & USB_PORT_STAT_POWER) |
| 321 | && !(port->status & USB_PORT_STAT_CONNECTION)) |
| 322 | break; |
| 323 | } |
| 324 | if (idx >= wusbhc->ports_max) { |
| 325 | dev_err(dev, "Host controller can't connect more devices " |
| 326 | "(%u already connected); device %s rejected\n", |
| 327 | wusbhc->ports_max, pr_cdid); |
| 328 | /* NOTE: we could send a WUIE_Disconnect here, but we haven't |
| 329 | * event acked, so the device will eventually timeout the |
| 330 | * connection, right? */ |
| 331 | goto error_unlock; |
| 332 | } |
| 333 | |
| 334 | devnum = idx + 2; |
| 335 | |
| 336 | /* Make sure we are using no crypto on that "virtual port" */ |
| 337 | wusbhc->set_ptk(wusbhc, idx, 0, NULL, 0); |
| 338 | |
| 339 | /* Grab a filled in Connect-Ack context, fill out the |
| 340 | * Connect-Ack Wireless USB IE, set the MMC */ |
| 341 | wusb_dev = wusbhc_cack_add(wusbhc, dnc, pr_cdid, idx); |
| 342 | if (wusb_dev == NULL) |
| 343 | goto error_unlock; |
| 344 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr); |
| 345 | if (result < 0) |
| 346 | goto error_unlock; |
| 347 | /* Give the device at least 2ms (WUSB1.0[7.5.1p3]), let's do |
| 348 | * three for a good measure */ |
| 349 | msleep(3); |
| 350 | port->wusb_dev = wusb_dev; |
| 351 | port->status |= USB_PORT_STAT_CONNECTION; |
| 352 | port->change |= USB_PORT_STAT_C_CONNECTION; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 353 | /* Now the port status changed to connected; khubd will |
| 354 | * pick the change up and try to reset the port to bring it to |
| 355 | * the enabled state--so this process returns up to the stack |
David Vrabel | 4656d5d | 2008-10-27 17:12:33 +0000 | [diff] [blame] | 356 | * and it calls back into wusbhc_rh_port_reset(). |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 357 | */ |
| 358 | error_unlock: |
| 359 | mutex_unlock(&wusbhc->mutex); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 360 | return; |
| 361 | |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * Disconnect a Wireless USB device from its fake port |
| 366 | * |
| 367 | * Marks the port as disconnected so that khubd can pick up the change |
| 368 | * and drops our knowledge about the device. |
| 369 | * |
| 370 | * Assumes there is a device connected |
| 371 | * |
| 372 | * @port_index: zero based port number |
| 373 | * |
| 374 | * NOTE: @wusbhc->mutex is locked |
| 375 | * |
| 376 | * WARNING: From here it is not very safe to access anything hanging off |
| 377 | * wusb_dev |
| 378 | */ |
| 379 | static void __wusbhc_dev_disconnect(struct wusbhc *wusbhc, |
| 380 | struct wusb_port *port) |
| 381 | { |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 382 | struct wusb_dev *wusb_dev = port->wusb_dev; |
| 383 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 384 | port->status &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE |
| 385 | | USB_PORT_STAT_SUSPEND | USB_PORT_STAT_RESET |
| 386 | | USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED); |
| 387 | port->change |= USB_PORT_STAT_C_CONNECTION | USB_PORT_STAT_C_ENABLE; |
| 388 | if (wusb_dev) { |
| 389 | if (!list_empty(&wusb_dev->cack_node)) |
| 390 | list_del_init(&wusb_dev->cack_node); |
| 391 | /* For the one in cack_add() */ |
| 392 | wusb_dev_put(wusb_dev); |
| 393 | } |
| 394 | port->wusb_dev = NULL; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 395 | |
| 396 | /* After a device disconnects, change the GTK (see [WUSB] |
| 397 | * section 6.2.11.2). */ |
| 398 | wusbhc_gtk_rekey(wusbhc); |
| 399 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 400 | /* The Wireless USB part has forgotten about the device already; now |
| 401 | * khubd's timer will pick up the disconnection and remove the USB |
| 402 | * device from the system |
| 403 | */ |
| 404 | } |
| 405 | |
| 406 | /* |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 407 | * Refresh the list of keep alives to emit in the MMC |
| 408 | * |
| 409 | * Some devices don't respond to keep alives unless they've been |
| 410 | * authenticated, so skip unauthenticated devices. |
| 411 | * |
| 412 | * We only publish the first four devices that have a coming timeout |
| 413 | * condition. Then when we are done processing those, we go for the |
| 414 | * next ones. We ignore the ones that have timed out already (they'll |
| 415 | * be purged). |
| 416 | * |
| 417 | * This might cause the first devices to timeout the last devices in |
| 418 | * the port array...FIXME: come up with a better algorithm? |
| 419 | * |
| 420 | * Note we can't do much about MMC's ops errors; we hope next refresh |
| 421 | * will kind of handle it. |
| 422 | * |
| 423 | * NOTE: @wusbhc->mutex is locked |
| 424 | */ |
| 425 | static void __wusbhc_keep_alive(struct wusbhc *wusbhc) |
| 426 | { |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 427 | struct device *dev = wusbhc->dev; |
| 428 | unsigned cnt; |
| 429 | struct wusb_dev *wusb_dev; |
| 430 | struct wusb_port *wusb_port; |
| 431 | struct wuie_keep_alive *ie = &wusbhc->keep_alive_ie; |
| 432 | unsigned keep_alives, old_keep_alives; |
| 433 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 434 | old_keep_alives = ie->hdr.bLength - sizeof(ie->hdr); |
| 435 | keep_alives = 0; |
| 436 | for (cnt = 0; |
| 437 | keep_alives <= WUIE_ELT_MAX && cnt < wusbhc->ports_max; |
| 438 | cnt++) { |
| 439 | unsigned tt = msecs_to_jiffies(wusbhc->trust_timeout); |
| 440 | |
| 441 | wusb_port = wusb_port_by_idx(wusbhc, cnt); |
| 442 | wusb_dev = wusb_port->wusb_dev; |
| 443 | |
| 444 | if (wusb_dev == NULL) |
| 445 | continue; |
| 446 | if (wusb_dev->usb_dev == NULL || !wusb_dev->usb_dev->authenticated) |
| 447 | continue; |
| 448 | |
| 449 | if (time_after(jiffies, wusb_dev->entry_ts + tt)) { |
| 450 | dev_err(dev, "KEEPALIVE: device %u timed out\n", |
| 451 | wusb_dev->addr); |
| 452 | __wusbhc_dev_disconnect(wusbhc, wusb_port); |
| 453 | } else if (time_after(jiffies, wusb_dev->entry_ts + tt/2)) { |
| 454 | /* Approaching timeout cut out, need to refresh */ |
| 455 | ie->bDeviceAddress[keep_alives++] = wusb_dev->addr; |
| 456 | } |
| 457 | } |
| 458 | if (keep_alives & 0x1) /* pad to even number ([WUSB] section 7.5.9) */ |
| 459 | ie->bDeviceAddress[keep_alives++] = 0x7f; |
| 460 | ie->hdr.bLength = sizeof(ie->hdr) + |
| 461 | keep_alives*sizeof(ie->bDeviceAddress[0]); |
David Vrabel | 8092d7c | 2008-10-16 13:56:53 +0100 | [diff] [blame] | 462 | if (keep_alives > 0) |
| 463 | wusbhc_mmcie_set(wusbhc, 10, 5, &ie->hdr); |
| 464 | else if (old_keep_alives != 0) |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 465 | wusbhc_mmcie_rm(wusbhc, &ie->hdr); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | /* |
| 469 | * Do a run through all devices checking for timeouts |
| 470 | */ |
| 471 | static void wusbhc_keep_alive_run(struct work_struct *ws) |
| 472 | { |
David Vrabel | 56968d0 | 2008-11-25 14:23:40 +0000 | [diff] [blame] | 473 | struct delayed_work *dw = container_of(ws, struct delayed_work, work); |
| 474 | struct wusbhc *wusbhc = container_of(dw, struct wusbhc, keep_alive_timer); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 475 | |
David Vrabel | 56968d0 | 2008-11-25 14:23:40 +0000 | [diff] [blame] | 476 | mutex_lock(&wusbhc->mutex); |
| 477 | __wusbhc_keep_alive(wusbhc); |
| 478 | mutex_unlock(&wusbhc->mutex); |
| 479 | |
| 480 | queue_delayed_work(wusbd, &wusbhc->keep_alive_timer, |
| 481 | msecs_to_jiffies(wusbhc->trust_timeout / 2)); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | /* |
| 485 | * Find the wusb_dev from its device address. |
| 486 | * |
| 487 | * The device can be found directly from the address (see |
| 488 | * wusb_cack_add() for where the device address is set to port_idx |
| 489 | * +2), except when the address is zero. |
| 490 | */ |
| 491 | static struct wusb_dev *wusbhc_find_dev_by_addr(struct wusbhc *wusbhc, u8 addr) |
| 492 | { |
| 493 | int p; |
| 494 | |
| 495 | if (addr == 0xff) /* unconnected */ |
| 496 | return NULL; |
| 497 | |
| 498 | if (addr > 0) { |
| 499 | int port = (addr & ~0x80) - 2; |
| 500 | if (port < 0 || port >= wusbhc->ports_max) |
| 501 | return NULL; |
| 502 | return wusb_port_by_idx(wusbhc, port)->wusb_dev; |
| 503 | } |
| 504 | |
| 505 | /* Look for the device with address 0. */ |
| 506 | for (p = 0; p < wusbhc->ports_max; p++) { |
| 507 | struct wusb_dev *wusb_dev = wusb_port_by_idx(wusbhc, p)->wusb_dev; |
| 508 | if (wusb_dev && wusb_dev->addr == addr) |
| 509 | return wusb_dev; |
| 510 | } |
| 511 | return NULL; |
| 512 | } |
| 513 | |
| 514 | /* |
| 515 | * Handle a DN_Alive notification (WUSB1.0[7.6.1]) |
| 516 | * |
| 517 | * This just updates the device activity timestamp and then refreshes |
| 518 | * the keep alive IE. |
| 519 | * |
| 520 | * @wusbhc shall be referenced and unlocked |
| 521 | */ |
| 522 | static void wusbhc_handle_dn_alive(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) |
| 523 | { |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 524 | mutex_lock(&wusbhc->mutex); |
| 525 | wusb_dev->entry_ts = jiffies; |
| 526 | __wusbhc_keep_alive(wusbhc); |
| 527 | mutex_unlock(&wusbhc->mutex); |
| 528 | } |
| 529 | |
| 530 | /* |
| 531 | * Handle a DN_Connect notification (WUSB1.0[7.6.1]) |
| 532 | * |
| 533 | * @wusbhc |
| 534 | * @pkt_hdr |
| 535 | * @size: Size of the buffer where the notification resides; if the |
| 536 | * notification data suggests there should be more data than |
| 537 | * available, an error will be signaled and the whole buffer |
| 538 | * consumed. |
| 539 | * |
| 540 | * @wusbhc->mutex shall be held |
| 541 | */ |
| 542 | static void wusbhc_handle_dn_connect(struct wusbhc *wusbhc, |
| 543 | struct wusb_dn_hdr *dn_hdr, |
| 544 | size_t size) |
| 545 | { |
| 546 | struct device *dev = wusbhc->dev; |
| 547 | struct wusb_dn_connect *dnc; |
| 548 | char pr_cdid[WUSB_CKHDID_STRSIZE]; |
| 549 | static const char *beacon_behaviour[] = { |
| 550 | "reserved", |
| 551 | "self-beacon", |
| 552 | "directed-beacon", |
| 553 | "no-beacon" |
| 554 | }; |
| 555 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 556 | if (size < sizeof(*dnc)) { |
| 557 | dev_err(dev, "DN CONNECT: short notification (%zu < %zu)\n", |
| 558 | size, sizeof(*dnc)); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 559 | return; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | dnc = container_of(dn_hdr, struct wusb_dn_connect, hdr); |
| 563 | ckhdid_printf(pr_cdid, sizeof(pr_cdid), &dnc->CDID); |
| 564 | dev_info(dev, "DN CONNECT: device %s @ %x (%s) wants to %s\n", |
| 565 | pr_cdid, |
| 566 | wusb_dn_connect_prev_dev_addr(dnc), |
| 567 | beacon_behaviour[wusb_dn_connect_beacon_behavior(dnc)], |
| 568 | wusb_dn_connect_new_connection(dnc) ? "connect" : "reconnect"); |
| 569 | /* ACK the connect */ |
| 570 | wusbhc_devconnect_ack(wusbhc, dnc, pr_cdid); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | /* |
| 574 | * Handle a DN_Disconnect notification (WUSB1.0[7.6.1]) |
| 575 | * |
| 576 | * Device is going down -- do the disconnect. |
| 577 | * |
| 578 | * @wusbhc shall be referenced and unlocked |
| 579 | */ |
| 580 | static void wusbhc_handle_dn_disconnect(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev) |
| 581 | { |
| 582 | struct device *dev = wusbhc->dev; |
| 583 | |
| 584 | dev_info(dev, "DN DISCONNECT: device 0x%02x going down\n", wusb_dev->addr); |
| 585 | |
| 586 | mutex_lock(&wusbhc->mutex); |
| 587 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, wusb_dev->port_idx)); |
| 588 | mutex_unlock(&wusbhc->mutex); |
| 589 | } |
| 590 | |
| 591 | /* |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 592 | * Handle a Device Notification coming a host |
| 593 | * |
| 594 | * The Device Notification comes from a host (HWA, DWA or WHCI) |
| 595 | * wrapped in a set of headers. Somebody else has peeled off those |
| 596 | * headers for us and we just get one Device Notifications. |
| 597 | * |
| 598 | * Invalid DNs (e.g., too short) are discarded. |
| 599 | * |
| 600 | * @wusbhc shall be referenced |
| 601 | * |
| 602 | * FIXMES: |
| 603 | * - implement priorities as in WUSB1.0[Table 7-55]? |
| 604 | */ |
| 605 | void wusbhc_handle_dn(struct wusbhc *wusbhc, u8 srcaddr, |
| 606 | struct wusb_dn_hdr *dn_hdr, size_t size) |
| 607 | { |
| 608 | struct device *dev = wusbhc->dev; |
| 609 | struct wusb_dev *wusb_dev; |
| 610 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 611 | if (size < sizeof(struct wusb_dn_hdr)) { |
| 612 | dev_err(dev, "DN data shorter than DN header (%d < %d)\n", |
| 613 | (int)size, (int)sizeof(struct wusb_dn_hdr)); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 614 | return; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | wusb_dev = wusbhc_find_dev_by_addr(wusbhc, srcaddr); |
| 618 | if (wusb_dev == NULL && dn_hdr->bType != WUSB_DN_CONNECT) { |
| 619 | dev_dbg(dev, "ignoring DN %d from unconnected device %02x\n", |
| 620 | dn_hdr->bType, srcaddr); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 621 | return; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | switch (dn_hdr->bType) { |
| 625 | case WUSB_DN_CONNECT: |
| 626 | wusbhc_handle_dn_connect(wusbhc, dn_hdr, size); |
| 627 | break; |
| 628 | case WUSB_DN_ALIVE: |
| 629 | wusbhc_handle_dn_alive(wusbhc, wusb_dev); |
| 630 | break; |
| 631 | case WUSB_DN_DISCONNECT: |
| 632 | wusbhc_handle_dn_disconnect(wusbhc, wusb_dev); |
| 633 | break; |
| 634 | case WUSB_DN_MASAVAILCHANGED: |
| 635 | case WUSB_DN_RWAKE: |
| 636 | case WUSB_DN_SLEEP: |
| 637 | /* FIXME: handle these DNs. */ |
| 638 | break; |
| 639 | case WUSB_DN_EPRDY: |
| 640 | /* The hardware handles these. */ |
| 641 | break; |
| 642 | default: |
| 643 | dev_warn(dev, "unknown DN %u (%d octets) from %u\n", |
| 644 | dn_hdr->bType, (int)size, srcaddr); |
| 645 | } |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 646 | } |
| 647 | EXPORT_SYMBOL_GPL(wusbhc_handle_dn); |
| 648 | |
| 649 | /* |
| 650 | * Disconnect a WUSB device from a the cluster |
| 651 | * |
| 652 | * @wusbhc |
| 653 | * @port Fake port where the device is (wusbhc index, not USB port number). |
| 654 | * |
| 655 | * In Wireless USB, a disconnect is basically telling the device he is |
| 656 | * being disconnected and forgetting about him. |
| 657 | * |
| 658 | * We send the device a Device Disconnect IE (WUSB1.0[7.5.11]) for 100 |
| 659 | * ms and then keep going. |
| 660 | * |
| 661 | * We don't do much in case of error; we always pretend we disabled |
| 662 | * the port and disconnected the device. If physically the request |
| 663 | * didn't get there (many things can fail in the way there), the stack |
| 664 | * will reject the device's communication attempts. |
| 665 | * |
| 666 | * @wusbhc should be refcounted and locked |
| 667 | */ |
| 668 | void __wusbhc_dev_disable(struct wusbhc *wusbhc, u8 port_idx) |
| 669 | { |
| 670 | int result; |
| 671 | struct device *dev = wusbhc->dev; |
| 672 | struct wusb_dev *wusb_dev; |
| 673 | struct wuie_disconnect *ie; |
| 674 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 675 | wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev; |
| 676 | if (wusb_dev == NULL) { |
| 677 | /* reset no device? ignore */ |
| 678 | dev_dbg(dev, "DISCONNECT: no device at port %u, ignoring\n", |
| 679 | port_idx); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 680 | return; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 681 | } |
| 682 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx)); |
| 683 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 684 | ie = kzalloc(sizeof(*ie), GFP_KERNEL); |
| 685 | if (ie == NULL) |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 686 | return; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 687 | ie->hdr.bLength = sizeof(*ie); |
| 688 | ie->hdr.bIEIdentifier = WUIE_ID_DEVICE_DISCONNECT; |
| 689 | ie->bDeviceAddress = wusb_dev->addr; |
| 690 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &ie->hdr); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 691 | if (result < 0) |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 692 | dev_err(dev, "DISCONNECT: can't set MMC: %d\n", result); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 693 | else { |
| 694 | /* At least 6 MMCs, assuming at least 1 MMC per zone. */ |
| 695 | msleep(7*4); |
| 696 | wusbhc_mmcie_rm(wusbhc, &ie->hdr); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 697 | } |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 698 | kfree(ie); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | /* |
| 702 | * Walk over the BOS descriptor, verify and grok it |
| 703 | * |
| 704 | * @usb_dev: referenced |
| 705 | * @wusb_dev: referenced and unlocked |
| 706 | * |
| 707 | * The BOS descriptor is defined at WUSB1.0[7.4.1], and it defines a |
| 708 | * "flexible" way to wrap all kinds of descriptors inside an standard |
| 709 | * descriptor (wonder why they didn't use normal descriptors, |
| 710 | * btw). Not like they lack code. |
| 711 | * |
| 712 | * At the end we go to look for the WUSB Device Capabilities |
| 713 | * (WUSB1.0[7.4.1.1]) that is wrapped in a device capability descriptor |
| 714 | * that is part of the BOS descriptor set. That tells us what does the |
| 715 | * device support (dual role, beacon type, UWB PHY rates). |
| 716 | */ |
| 717 | static int wusb_dev_bos_grok(struct usb_device *usb_dev, |
| 718 | struct wusb_dev *wusb_dev, |
| 719 | struct usb_bos_descriptor *bos, size_t desc_size) |
| 720 | { |
| 721 | ssize_t result; |
| 722 | struct device *dev = &usb_dev->dev; |
| 723 | void *itr, *top; |
| 724 | |
| 725 | /* Walk over BOS capabilities, verify them */ |
| 726 | itr = (void *)bos + sizeof(*bos); |
| 727 | top = itr + desc_size - sizeof(*bos); |
| 728 | while (itr < top) { |
| 729 | struct usb_dev_cap_header *cap_hdr = itr; |
| 730 | size_t cap_size; |
| 731 | u8 cap_type; |
| 732 | if (top - itr < sizeof(*cap_hdr)) { |
| 733 | dev_err(dev, "Device BUG? premature end of BOS header " |
| 734 | "data [offset 0x%02x]: only %zu bytes left\n", |
| 735 | (int)(itr - (void *)bos), top - itr); |
| 736 | result = -ENOSPC; |
| 737 | goto error_bad_cap; |
| 738 | } |
| 739 | cap_size = cap_hdr->bLength; |
| 740 | cap_type = cap_hdr->bDevCapabilityType; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 741 | if (cap_size == 0) |
| 742 | break; |
| 743 | if (cap_size > top - itr) { |
| 744 | dev_err(dev, "Device BUG? premature end of BOS data " |
| 745 | "[offset 0x%02x cap %02x %zu bytes]: " |
| 746 | "only %zu bytes left\n", |
| 747 | (int)(itr - (void *)bos), |
| 748 | cap_type, cap_size, top - itr); |
| 749 | result = -EBADF; |
| 750 | goto error_bad_cap; |
| 751 | } |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 752 | switch (cap_type) { |
| 753 | case USB_CAP_TYPE_WIRELESS_USB: |
| 754 | if (cap_size != sizeof(*wusb_dev->wusb_cap_descr)) |
| 755 | dev_err(dev, "Device BUG? WUSB Capability " |
| 756 | "descriptor is %zu bytes vs %zu " |
| 757 | "needed\n", cap_size, |
| 758 | sizeof(*wusb_dev->wusb_cap_descr)); |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 759 | else |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 760 | wusb_dev->wusb_cap_descr = itr; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 761 | break; |
| 762 | default: |
| 763 | dev_err(dev, "BUG? Unknown BOS capability 0x%02x " |
| 764 | "(%zu bytes) at offset 0x%02x\n", cap_type, |
| 765 | cap_size, (int)(itr - (void *)bos)); |
| 766 | } |
| 767 | itr += cap_size; |
| 768 | } |
| 769 | result = 0; |
| 770 | error_bad_cap: |
| 771 | return result; |
| 772 | } |
| 773 | |
| 774 | /* |
| 775 | * Add information from the BOS descriptors to the device |
| 776 | * |
| 777 | * @usb_dev: referenced |
| 778 | * @wusb_dev: referenced and unlocked |
| 779 | * |
| 780 | * So what we do is we alloc a space for the BOS descriptor of 64 |
| 781 | * bytes; read the first four bytes which include the wTotalLength |
| 782 | * field (WUSB1.0[T7-26]) and if it fits in those 64 bytes, read the |
| 783 | * whole thing. If not we realloc to that size. |
| 784 | * |
| 785 | * Then we call the groking function, that will fill up |
| 786 | * wusb_dev->wusb_cap_descr, which is what we'll need later on. |
| 787 | */ |
| 788 | static int wusb_dev_bos_add(struct usb_device *usb_dev, |
| 789 | struct wusb_dev *wusb_dev) |
| 790 | { |
| 791 | ssize_t result; |
| 792 | struct device *dev = &usb_dev->dev; |
| 793 | struct usb_bos_descriptor *bos; |
| 794 | size_t alloc_size = 32, desc_size = 4; |
| 795 | |
| 796 | bos = kmalloc(alloc_size, GFP_KERNEL); |
| 797 | if (bos == NULL) |
| 798 | return -ENOMEM; |
| 799 | result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size); |
| 800 | if (result < 4) { |
| 801 | dev_err(dev, "Can't get BOS descriptor or too short: %zd\n", |
| 802 | result); |
| 803 | goto error_get_descriptor; |
| 804 | } |
| 805 | desc_size = le16_to_cpu(bos->wTotalLength); |
| 806 | if (desc_size >= alloc_size) { |
| 807 | kfree(bos); |
| 808 | alloc_size = desc_size; |
| 809 | bos = kmalloc(alloc_size, GFP_KERNEL); |
| 810 | if (bos == NULL) |
| 811 | return -ENOMEM; |
| 812 | } |
| 813 | result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size); |
| 814 | if (result < 0 || result != desc_size) { |
| 815 | dev_err(dev, "Can't get BOS descriptor or too short (need " |
| 816 | "%zu bytes): %zd\n", desc_size, result); |
| 817 | goto error_get_descriptor; |
| 818 | } |
| 819 | if (result < sizeof(*bos) |
| 820 | || le16_to_cpu(bos->wTotalLength) != desc_size) { |
| 821 | dev_err(dev, "Can't get BOS descriptor or too short (need " |
| 822 | "%zu bytes): %zd\n", desc_size, result); |
| 823 | goto error_get_descriptor; |
| 824 | } |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 825 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 826 | result = wusb_dev_bos_grok(usb_dev, wusb_dev, bos, result); |
| 827 | if (result < 0) |
| 828 | goto error_bad_bos; |
| 829 | wusb_dev->bos = bos; |
| 830 | return 0; |
| 831 | |
| 832 | error_bad_bos: |
| 833 | error_get_descriptor: |
| 834 | kfree(bos); |
| 835 | wusb_dev->wusb_cap_descr = NULL; |
| 836 | return result; |
| 837 | } |
| 838 | |
| 839 | static void wusb_dev_bos_rm(struct wusb_dev *wusb_dev) |
| 840 | { |
| 841 | kfree(wusb_dev->bos); |
| 842 | wusb_dev->wusb_cap_descr = NULL; |
| 843 | }; |
| 844 | |
| 845 | static struct usb_wireless_cap_descriptor wusb_cap_descr_default = { |
| 846 | .bLength = sizeof(wusb_cap_descr_default), |
| 847 | .bDescriptorType = USB_DT_DEVICE_CAPABILITY, |
| 848 | .bDevCapabilityType = USB_CAP_TYPE_WIRELESS_USB, |
| 849 | |
| 850 | .bmAttributes = USB_WIRELESS_BEACON_NONE, |
| 851 | .wPHYRates = cpu_to_le16(USB_WIRELESS_PHY_53), |
| 852 | .bmTFITXPowerInfo = 0, |
| 853 | .bmFFITXPowerInfo = 0, |
| 854 | .bmBandGroup = cpu_to_le16(0x0001), /* WUSB1.0[7.4.1] bottom */ |
| 855 | .bReserved = 0 |
| 856 | }; |
| 857 | |
| 858 | /* |
| 859 | * USB stack's device addition Notifier Callback |
| 860 | * |
| 861 | * Called from drivers/usb/core/hub.c when a new device is added; we |
| 862 | * use this hook to perform certain WUSB specific setup work on the |
| 863 | * new device. As well, it is the first time we can connect the |
| 864 | * wusb_dev and the usb_dev. So we note it down in wusb_dev and take a |
| 865 | * reference that we'll drop. |
| 866 | * |
| 867 | * First we need to determine if the device is a WUSB device (else we |
| 868 | * ignore it). For that we use the speed setting (USB_SPEED_VARIABLE) |
| 869 | * [FIXME: maybe we'd need something more definitive]. If so, we track |
| 870 | * it's usb_busd and from there, the WUSB HC. |
| 871 | * |
| 872 | * Because all WUSB HCs are contained in a 'struct wusbhc', voila, we |
| 873 | * get the wusbhc for the device. |
| 874 | * |
| 875 | * We have a reference on @usb_dev (as we are called at the end of its |
| 876 | * enumeration). |
| 877 | * |
| 878 | * NOTE: @usb_dev locked |
| 879 | */ |
| 880 | static void wusb_dev_add_ncb(struct usb_device *usb_dev) |
| 881 | { |
| 882 | int result = 0; |
| 883 | struct wusb_dev *wusb_dev; |
| 884 | struct wusbhc *wusbhc; |
| 885 | struct device *dev = &usb_dev->dev; |
| 886 | u8 port_idx; |
| 887 | |
| 888 | if (usb_dev->wusb == 0 || usb_dev->devnum == 1) |
| 889 | return; /* skip non wusb and wusb RHs */ |
| 890 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 891 | wusbhc = wusbhc_get_by_usb_dev(usb_dev); |
| 892 | if (wusbhc == NULL) |
| 893 | goto error_nodev; |
| 894 | mutex_lock(&wusbhc->mutex); |
| 895 | wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, usb_dev); |
| 896 | port_idx = wusb_port_no_to_idx(usb_dev->portnum); |
| 897 | mutex_unlock(&wusbhc->mutex); |
| 898 | if (wusb_dev == NULL) |
| 899 | goto error_nodev; |
| 900 | wusb_dev->usb_dev = usb_get_dev(usb_dev); |
| 901 | usb_dev->wusb_dev = wusb_dev_get(wusb_dev); |
| 902 | result = wusb_dev_sec_add(wusbhc, usb_dev, wusb_dev); |
| 903 | if (result < 0) { |
| 904 | dev_err(dev, "Cannot enable security: %d\n", result); |
| 905 | goto error_sec_add; |
| 906 | } |
| 907 | /* Now query the device for it's BOS and attach it to wusb_dev */ |
| 908 | result = wusb_dev_bos_add(usb_dev, wusb_dev); |
| 909 | if (result < 0) { |
| 910 | dev_err(dev, "Cannot get BOS descriptors: %d\n", result); |
| 911 | goto error_bos_add; |
| 912 | } |
| 913 | result = wusb_dev_sysfs_add(wusbhc, usb_dev, wusb_dev); |
| 914 | if (result < 0) |
| 915 | goto error_add_sysfs; |
| 916 | out: |
| 917 | wusb_dev_put(wusb_dev); |
| 918 | wusbhc_put(wusbhc); |
| 919 | error_nodev: |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 920 | return; |
| 921 | |
| 922 | wusb_dev_sysfs_rm(wusb_dev); |
| 923 | error_add_sysfs: |
| 924 | wusb_dev_bos_rm(wusb_dev); |
| 925 | error_bos_add: |
| 926 | wusb_dev_sec_rm(wusb_dev); |
| 927 | error_sec_add: |
| 928 | mutex_lock(&wusbhc->mutex); |
| 929 | __wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx)); |
| 930 | mutex_unlock(&wusbhc->mutex); |
| 931 | goto out; |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * Undo all the steps done at connection by the notifier callback |
| 936 | * |
| 937 | * NOTE: @usb_dev locked |
| 938 | */ |
| 939 | static void wusb_dev_rm_ncb(struct usb_device *usb_dev) |
| 940 | { |
| 941 | struct wusb_dev *wusb_dev = usb_dev->wusb_dev; |
| 942 | |
| 943 | if (usb_dev->wusb == 0 || usb_dev->devnum == 1) |
| 944 | return; /* skip non wusb and wusb RHs */ |
| 945 | |
| 946 | wusb_dev_sysfs_rm(wusb_dev); |
| 947 | wusb_dev_bos_rm(wusb_dev); |
| 948 | wusb_dev_sec_rm(wusb_dev); |
| 949 | wusb_dev->usb_dev = NULL; |
| 950 | usb_dev->wusb_dev = NULL; |
| 951 | wusb_dev_put(wusb_dev); |
| 952 | usb_put_dev(usb_dev); |
| 953 | } |
| 954 | |
| 955 | /* |
| 956 | * Handle notifications from the USB stack (notifier call back) |
| 957 | * |
| 958 | * This is called when the USB stack does a |
| 959 | * usb_{bus,device}_{add,remove}() so we can do WUSB specific |
| 960 | * handling. It is called with [for the case of |
| 961 | * USB_DEVICE_{ADD,REMOVE} with the usb_dev locked. |
| 962 | */ |
| 963 | int wusb_usb_ncb(struct notifier_block *nb, unsigned long val, |
| 964 | void *priv) |
| 965 | { |
| 966 | int result = NOTIFY_OK; |
| 967 | |
| 968 | switch (val) { |
| 969 | case USB_DEVICE_ADD: |
| 970 | wusb_dev_add_ncb(priv); |
| 971 | break; |
| 972 | case USB_DEVICE_REMOVE: |
| 973 | wusb_dev_rm_ncb(priv); |
| 974 | break; |
| 975 | case USB_BUS_ADD: |
| 976 | /* ignore (for now) */ |
| 977 | case USB_BUS_REMOVE: |
| 978 | break; |
| 979 | default: |
| 980 | WARN_ON(1); |
| 981 | result = NOTIFY_BAD; |
| 982 | }; |
| 983 | return result; |
| 984 | } |
| 985 | |
| 986 | /* |
| 987 | * Return a referenced wusb_dev given a @wusbhc and @usb_dev |
| 988 | */ |
| 989 | struct wusb_dev *__wusb_dev_get_by_usb_dev(struct wusbhc *wusbhc, |
| 990 | struct usb_device *usb_dev) |
| 991 | { |
| 992 | struct wusb_dev *wusb_dev; |
| 993 | u8 port_idx; |
| 994 | |
| 995 | port_idx = wusb_port_no_to_idx(usb_dev->portnum); |
| 996 | BUG_ON(port_idx > wusbhc->ports_max); |
| 997 | wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev; |
| 998 | if (wusb_dev != NULL) /* ops, device is gone */ |
| 999 | wusb_dev_get(wusb_dev); |
| 1000 | return wusb_dev; |
| 1001 | } |
| 1002 | EXPORT_SYMBOL_GPL(__wusb_dev_get_by_usb_dev); |
| 1003 | |
| 1004 | void wusb_dev_destroy(struct kref *_wusb_dev) |
| 1005 | { |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 1006 | struct wusb_dev *wusb_dev = container_of(_wusb_dev, struct wusb_dev, refcnt); |
| 1007 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 1008 | list_del_init(&wusb_dev->cack_node); |
| 1009 | wusb_dev_free(wusb_dev); |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 1010 | } |
| 1011 | EXPORT_SYMBOL_GPL(wusb_dev_destroy); |
| 1012 | |
| 1013 | /* |
| 1014 | * Create all the device connect handling infrastructure |
| 1015 | * |
| 1016 | * This is basically the device info array, Connect Acknowledgement |
| 1017 | * (cack) lists, keep-alive timers (and delayed work thread). |
| 1018 | */ |
| 1019 | int wusbhc_devconnect_create(struct wusbhc *wusbhc) |
| 1020 | { |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 1021 | wusbhc->keep_alive_ie.hdr.bIEIdentifier = WUIE_ID_KEEP_ALIVE; |
| 1022 | wusbhc->keep_alive_ie.hdr.bLength = sizeof(wusbhc->keep_alive_ie.hdr); |
| 1023 | INIT_DELAYED_WORK(&wusbhc->keep_alive_timer, wusbhc_keep_alive_run); |
| 1024 | |
| 1025 | wusbhc->cack_ie.hdr.bIEIdentifier = WUIE_ID_CONNECTACK; |
| 1026 | wusbhc->cack_ie.hdr.bLength = sizeof(wusbhc->cack_ie.hdr); |
| 1027 | INIT_LIST_HEAD(&wusbhc->cack_list); |
| 1028 | |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 1029 | return 0; |
| 1030 | } |
| 1031 | |
| 1032 | /* |
| 1033 | * Release all resources taken by the devconnect stuff |
| 1034 | */ |
| 1035 | void wusbhc_devconnect_destroy(struct wusbhc *wusbhc) |
| 1036 | { |
David Vrabel | bce8369 | 2008-12-22 18:22:50 +0000 | [diff] [blame] | 1037 | /* no op */ |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * wusbhc_devconnect_start - start accepting device connections |
| 1042 | * @wusbhc: the WUSB HC |
| 1043 | * |
| 1044 | * Sets the Host Info IE to accept all new connections. |
| 1045 | * |
| 1046 | * FIXME: This also enables the keep alives but this is not necessary |
| 1047 | * until there are connected and authenticated devices. |
| 1048 | */ |
David Vrabel | 6fae35f | 2008-11-17 15:53:42 +0000 | [diff] [blame] | 1049 | int wusbhc_devconnect_start(struct wusbhc *wusbhc) |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 1050 | { |
| 1051 | struct device *dev = wusbhc->dev; |
| 1052 | struct wuie_host_info *hi; |
| 1053 | int result; |
| 1054 | |
| 1055 | hi = kzalloc(sizeof(*hi), GFP_KERNEL); |
| 1056 | if (hi == NULL) |
| 1057 | return -ENOMEM; |
| 1058 | |
| 1059 | hi->hdr.bLength = sizeof(*hi); |
| 1060 | hi->hdr.bIEIdentifier = WUIE_ID_HOST_INFO; |
| 1061 | hi->attributes = cpu_to_le16((wusbhc->rsv->stream << 3) | WUIE_HI_CAP_ALL); |
David Vrabel | 6fae35f | 2008-11-17 15:53:42 +0000 | [diff] [blame] | 1062 | hi->CHID = wusbhc->chid; |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 1063 | result = wusbhc_mmcie_set(wusbhc, 0, 0, &hi->hdr); |
| 1064 | if (result < 0) { |
| 1065 | dev_err(dev, "Cannot add Host Info MMCIE: %d\n", result); |
| 1066 | goto error_mmcie_set; |
| 1067 | } |
| 1068 | wusbhc->wuie_host_info = hi; |
| 1069 | |
| 1070 | queue_delayed_work(wusbd, &wusbhc->keep_alive_timer, |
| 1071 | (wusbhc->trust_timeout*CONFIG_HZ)/1000/2); |
| 1072 | |
| 1073 | return 0; |
| 1074 | |
| 1075 | error_mmcie_set: |
| 1076 | kfree(hi); |
| 1077 | return result; |
| 1078 | } |
| 1079 | |
| 1080 | /* |
| 1081 | * wusbhc_devconnect_stop - stop managing connected devices |
| 1082 | * @wusbhc: the WUSB HC |
| 1083 | * |
| 1084 | * Removes the Host Info IE and stops the keep alives. |
| 1085 | * |
| 1086 | * FIXME: should this disconnect all devices? |
| 1087 | */ |
| 1088 | void wusbhc_devconnect_stop(struct wusbhc *wusbhc) |
| 1089 | { |
| 1090 | cancel_delayed_work_sync(&wusbhc->keep_alive_timer); |
| 1091 | WARN_ON(!list_empty(&wusbhc->cack_list)); |
| 1092 | |
| 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); |
Anderson Lizardo | f51c23b | 2008-09-17 16:34:31 +0100 | [diff] [blame] | 1110 | if (result < 0) |
Inaky Perez-Gonzalez | b69fada | 2008-09-17 16:34:24 +0100 | [diff] [blame] | 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 | } |