Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | Copyright (C) 2004 - 2007 rt2x00 SourceForge Project |
| 3 | <http://rt2x00.serialmonkey.com> |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the |
| 17 | Free Software Foundation, Inc., |
| 18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | Module: rt2x00usb |
| 23 | Abstract: rt2x00 generic usb device routines. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * Set enviroment defines for rt2x00.h |
| 28 | */ |
| 29 | #define DRV_NAME "rt2x00usb" |
| 30 | |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/usb.h> |
Adam Baker | 3d82346 | 2007-10-27 13:43:29 +0200 | [diff] [blame^] | 34 | #include <linux/bug.h> |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 35 | |
| 36 | #include "rt2x00.h" |
| 37 | #include "rt2x00usb.h" |
| 38 | |
| 39 | /* |
| 40 | * Interfacing with the HW. |
| 41 | */ |
Adam Baker | 0e14f6d | 2007-10-27 13:41:25 +0200 | [diff] [blame] | 42 | int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev, |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 43 | const u8 request, const u8 requesttype, |
| 44 | const u16 offset, const u16 value, |
| 45 | void *buffer, const u16 buffer_length, |
Ivo van Doorn | e913655 | 2007-09-25 20:54:20 +0200 | [diff] [blame] | 46 | const int timeout) |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 47 | { |
| 48 | struct usb_device *usb_dev = |
| 49 | interface_to_usbdev(rt2x00dev_usb(rt2x00dev)); |
| 50 | int status; |
| 51 | unsigned int i; |
| 52 | unsigned int pipe = |
| 53 | (requesttype == USB_VENDOR_REQUEST_IN) ? |
| 54 | usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0); |
| 55 | |
Adam Baker | 3d82346 | 2007-10-27 13:43:29 +0200 | [diff] [blame^] | 56 | |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 57 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
| 58 | status = usb_control_msg(usb_dev, pipe, request, requesttype, |
| 59 | value, offset, buffer, buffer_length, |
| 60 | timeout); |
| 61 | if (status >= 0) |
| 62 | return 0; |
| 63 | |
| 64 | /* |
Ivo van Doorn | e913655 | 2007-09-25 20:54:20 +0200 | [diff] [blame] | 65 | * Check for errors |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 66 | * -ENODEV: Device has disappeared, no point continuing. |
Ivo van Doorn | e913655 | 2007-09-25 20:54:20 +0200 | [diff] [blame] | 67 | * All other errors: Try again. |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 68 | */ |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 69 | else if (status == -ENODEV) |
| 70 | break; |
| 71 | } |
| 72 | |
| 73 | ERROR(rt2x00dev, |
| 74 | "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n", |
| 75 | request, offset, status); |
| 76 | |
| 77 | return status; |
| 78 | } |
| 79 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request); |
| 80 | |
Adam Baker | 3d82346 | 2007-10-27 13:43:29 +0200 | [diff] [blame^] | 81 | int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev, |
| 82 | const u8 request, const u8 requesttype, |
| 83 | const u16 offset, void *buffer, |
| 84 | const u16 buffer_length, const int timeout) |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 85 | { |
| 86 | int status; |
| 87 | |
Adam Baker | 3d82346 | 2007-10-27 13:43:29 +0200 | [diff] [blame^] | 88 | BUG_ON(!mutex_is_locked(&rt2x00dev->usb_cache_mutex)); |
| 89 | |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 90 | /* |
| 91 | * Check for Cache availability. |
| 92 | */ |
| 93 | if (unlikely(!rt2x00dev->csr_cache || buffer_length > CSR_CACHE_SIZE)) { |
| 94 | ERROR(rt2x00dev, "CSR cache not available.\n"); |
| 95 | return -ENOMEM; |
| 96 | } |
| 97 | |
| 98 | if (requesttype == USB_VENDOR_REQUEST_OUT) |
| 99 | memcpy(rt2x00dev->csr_cache, buffer, buffer_length); |
| 100 | |
| 101 | status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype, |
| 102 | offset, 0, rt2x00dev->csr_cache, |
| 103 | buffer_length, timeout); |
| 104 | |
| 105 | if (!status && requesttype == USB_VENDOR_REQUEST_IN) |
| 106 | memcpy(buffer, rt2x00dev->csr_cache, buffer_length); |
| 107 | |
| 108 | return status; |
| 109 | } |
Adam Baker | 3d82346 | 2007-10-27 13:43:29 +0200 | [diff] [blame^] | 110 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock); |
| 111 | |
| 112 | int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev, |
| 113 | const u8 request, const u8 requesttype, |
| 114 | const u16 offset, void *buffer, |
| 115 | const u16 buffer_length, const int timeout) |
| 116 | { |
| 117 | int status; |
| 118 | |
| 119 | mutex_lock(&rt2x00dev->usb_cache_mutex); |
| 120 | |
| 121 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, |
| 122 | requesttype, offset, buffer, |
| 123 | buffer_length, timeout); |
| 124 | |
| 125 | mutex_unlock(&rt2x00dev->usb_cache_mutex); |
| 126 | |
| 127 | return status; |
| 128 | } |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 129 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
| 130 | |
| 131 | /* |
| 132 | * TX data handlers. |
| 133 | */ |
| 134 | static void rt2x00usb_interrupt_txdone(struct urb *urb) |
| 135 | { |
| 136 | struct data_entry *entry = (struct data_entry *)urb->context; |
| 137 | struct data_ring *ring = entry->ring; |
| 138 | struct rt2x00_dev *rt2x00dev = ring->rt2x00dev; |
Ivo van Doorn | 4bd7c45 | 2008-01-24 00:48:03 -0800 | [diff] [blame] | 139 | __le32 *txd = (__le32 *)entry->skb->data; |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 140 | u32 word; |
| 141 | int tx_status; |
| 142 | |
| 143 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || |
| 144 | !__test_and_clear_bit(ENTRY_OWNER_NIC, &entry->flags)) |
| 145 | return; |
| 146 | |
| 147 | rt2x00_desc_read(txd, 0, &word); |
| 148 | |
| 149 | /* |
| 150 | * Remove the descriptor data from the buffer. |
| 151 | */ |
| 152 | skb_pull(entry->skb, ring->desc_size); |
| 153 | |
| 154 | /* |
| 155 | * Obtain the status about this packet. |
| 156 | */ |
| 157 | tx_status = !urb->status ? TX_SUCCESS : TX_FAIL_RETRY; |
| 158 | |
| 159 | rt2x00lib_txdone(entry, tx_status, 0); |
| 160 | |
| 161 | /* |
| 162 | * Make this entry available for reuse. |
| 163 | */ |
| 164 | entry->flags = 0; |
| 165 | rt2x00_ring_index_done_inc(entry->ring); |
| 166 | |
| 167 | /* |
| 168 | * If the data ring was full before the txdone handler |
| 169 | * we must make sure the packet queue in the mac80211 stack |
| 170 | * is reenabled when the txdone handler has finished. |
| 171 | */ |
| 172 | if (!rt2x00_ring_full(ring)) |
| 173 | ieee80211_wake_queue(rt2x00dev->hw, |
| 174 | entry->tx_status.control.queue); |
| 175 | } |
| 176 | |
| 177 | int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev, |
| 178 | struct data_ring *ring, struct sk_buff *skb, |
| 179 | struct ieee80211_tx_control *control) |
| 180 | { |
| 181 | struct usb_device *usb_dev = |
| 182 | interface_to_usbdev(rt2x00dev_usb(rt2x00dev)); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 183 | struct data_entry *entry = rt2x00_get_data_entry(ring); |
Ivo van Doorn | dd9fa2d | 2007-10-06 14:15:46 +0200 | [diff] [blame] | 184 | int pipe = usb_sndbulkpipe(usb_dev, 1); |
Ivo van Doorn | dd9fa2d | 2007-10-06 14:15:46 +0200 | [diff] [blame] | 185 | u32 length; |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 186 | |
| 187 | if (rt2x00_ring_full(ring)) { |
| 188 | ieee80211_stop_queue(rt2x00dev->hw, control->queue); |
| 189 | return -EINVAL; |
| 190 | } |
| 191 | |
| 192 | if (test_bit(ENTRY_OWNER_NIC, &entry->flags)) { |
| 193 | ERROR(rt2x00dev, |
| 194 | "Arrived at non-free entry in the non-full queue %d.\n" |
| 195 | "Please file bug report to %s.\n", |
| 196 | control->queue, DRV_PROJECT); |
| 197 | ieee80211_stop_queue(rt2x00dev->hw, control->queue); |
| 198 | return -EINVAL; |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * Add the descriptor in front of the skb. |
| 203 | */ |
Ivo van Doorn | dd9fa2d | 2007-10-06 14:15:46 +0200 | [diff] [blame] | 204 | skb_push(skb, ring->desc_size); |
| 205 | memset(skb->data, 0, ring->desc_size); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 206 | |
Ivo van Doorn | 4bd7c45 | 2008-01-24 00:48:03 -0800 | [diff] [blame] | 207 | rt2x00lib_write_tx_desc(rt2x00dev, (__le32 *)skb->data, |
Ivo van Doorn | dd9fa2d | 2007-10-06 14:15:46 +0200 | [diff] [blame] | 208 | (struct ieee80211_hdr *)(skb->data + |
| 209 | ring->desc_size), |
| 210 | skb->len - ring->desc_size, control); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 211 | memcpy(&entry->tx_status.control, control, sizeof(*control)); |
| 212 | entry->skb = skb; |
| 213 | |
| 214 | /* |
Ivo van Doorn | dd9fa2d | 2007-10-06 14:15:46 +0200 | [diff] [blame] | 215 | * USB devices cannot blindly pass the skb->len as the |
| 216 | * length of the data to usb_fill_bulk_urb. Pass the skb |
| 217 | * to the driver to determine what the length should be. |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 218 | */ |
Ivo van Doorn | b242e89 | 2007-11-15 23:41:31 +0100 | [diff] [blame] | 219 | length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, skb); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 220 | |
Ivo van Doorn | dd9fa2d | 2007-10-06 14:15:46 +0200 | [diff] [blame] | 221 | /* |
| 222 | * Initialize URB and send the frame to the device. |
| 223 | */ |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 224 | __set_bit(ENTRY_OWNER_NIC, &entry->flags); |
Ivo van Doorn | dd9fa2d | 2007-10-06 14:15:46 +0200 | [diff] [blame] | 225 | usb_fill_bulk_urb(entry->priv, usb_dev, pipe, |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 226 | skb->data, length, rt2x00usb_interrupt_txdone, entry); |
| 227 | usb_submit_urb(entry->priv, GFP_ATOMIC); |
| 228 | |
| 229 | rt2x00_ring_index_inc(ring); |
| 230 | |
| 231 | if (rt2x00_ring_full(ring)) |
| 232 | ieee80211_stop_queue(rt2x00dev->hw, control->queue); |
| 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); |
| 237 | |
| 238 | /* |
| 239 | * RX data handlers. |
| 240 | */ |
| 241 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) |
| 242 | { |
| 243 | struct data_entry *entry = (struct data_entry *)urb->context; |
| 244 | struct data_ring *ring = entry->ring; |
| 245 | struct rt2x00_dev *rt2x00dev = ring->rt2x00dev; |
| 246 | struct sk_buff *skb; |
Ivo van Doorn | c5d0dc5 | 2008-01-06 23:40:27 +0100 | [diff] [blame] | 247 | struct ieee80211_hdr *hdr; |
Johannes Berg | 4150c57 | 2007-09-17 01:29:23 -0400 | [diff] [blame] | 248 | struct rxdata_entry_desc desc; |
Ivo van Doorn | c5d0dc5 | 2008-01-06 23:40:27 +0100 | [diff] [blame] | 249 | int header_size; |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 250 | int frame_size; |
| 251 | |
| 252 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || |
| 253 | !test_and_clear_bit(ENTRY_OWNER_NIC, &entry->flags)) |
| 254 | return; |
| 255 | |
| 256 | /* |
| 257 | * Check if the received data is simply too small |
| 258 | * to be actually valid, or if the urb is signaling |
| 259 | * a problem. |
| 260 | */ |
| 261 | if (urb->actual_length < entry->ring->desc_size || urb->status) |
| 262 | goto skip_entry; |
| 263 | |
Johannes Berg | 4150c57 | 2007-09-17 01:29:23 -0400 | [diff] [blame] | 264 | memset(&desc, 0x00, sizeof(desc)); |
| 265 | rt2x00dev->ops->lib->fill_rxdone(entry, &desc); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 266 | |
| 267 | /* |
| 268 | * Allocate a new sk buffer to replace the current one. |
| 269 | * If allocation fails, we should drop the current frame |
| 270 | * so we can recycle the existing sk buffer for the new frame. |
Ivo van Doorn | d101f64 | 2008-01-11 20:53:07 +0100 | [diff] [blame] | 271 | * As alignment we use 2 and not NET_IP_ALIGN because we need |
| 272 | * to be sure we have 2 bytes room in the head. (NET_IP_ALIGN |
| 273 | * can be 0 on some hardware). We use these 2 bytes for frame |
| 274 | * alignment later, we assume that the chance that |
| 275 | * header_size % 4 == 2 is bigger then header_size % 2 == 0 |
| 276 | * and thus optimize alignment by reserving the 2 bytes in |
| 277 | * advance. |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 278 | */ |
| 279 | frame_size = entry->ring->data_size + entry->ring->desc_size; |
Ivo van Doorn | d101f64 | 2008-01-11 20:53:07 +0100 | [diff] [blame] | 280 | skb = dev_alloc_skb(frame_size + 2); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 281 | if (!skb) |
| 282 | goto skip_entry; |
| 283 | |
Ivo van Doorn | d101f64 | 2008-01-11 20:53:07 +0100 | [diff] [blame] | 284 | skb_reserve(skb, 2); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 285 | skb_put(skb, frame_size); |
| 286 | |
| 287 | /* |
Ivo van Doorn | c5d0dc5 | 2008-01-06 23:40:27 +0100 | [diff] [blame] | 288 | * The data behind the ieee80211 header must be |
| 289 | * aligned on a 4 byte boundary. |
| 290 | * After that trim the entire buffer down to only |
| 291 | * contain the valid frame data excluding the device |
| 292 | * descriptor. |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 293 | */ |
Ivo van Doorn | c5d0dc5 | 2008-01-06 23:40:27 +0100 | [diff] [blame] | 294 | hdr = (struct ieee80211_hdr *)entry->skb->data; |
| 295 | header_size = |
| 296 | ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); |
| 297 | |
| 298 | if (header_size % 4 == 0) { |
| 299 | skb_push(entry->skb, 2); |
| 300 | memmove(entry->skb->data, entry->skb->data + 2, skb->len - 2); |
| 301 | } |
Johannes Berg | 4150c57 | 2007-09-17 01:29:23 -0400 | [diff] [blame] | 302 | skb_trim(entry->skb, desc.size); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 303 | |
| 304 | /* |
| 305 | * Send the frame to rt2x00lib for further processing. |
| 306 | */ |
Johannes Berg | 4150c57 | 2007-09-17 01:29:23 -0400 | [diff] [blame] | 307 | rt2x00lib_rxdone(entry, entry->skb, &desc); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 308 | |
| 309 | /* |
| 310 | * Replace current entry's skb with the newly allocated one, |
| 311 | * and reinitialize the urb. |
| 312 | */ |
| 313 | entry->skb = skb; |
| 314 | urb->transfer_buffer = entry->skb->data; |
| 315 | urb->transfer_buffer_length = entry->skb->len; |
| 316 | |
| 317 | skip_entry: |
| 318 | if (test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags)) { |
| 319 | __set_bit(ENTRY_OWNER_NIC, &entry->flags); |
| 320 | usb_submit_urb(urb, GFP_ATOMIC); |
| 321 | } |
| 322 | |
| 323 | rt2x00_ring_index_inc(ring); |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * Radio handlers |
| 328 | */ |
| 329 | void rt2x00usb_enable_radio(struct rt2x00_dev *rt2x00dev) |
| 330 | { |
| 331 | struct usb_device *usb_dev = |
| 332 | interface_to_usbdev(rt2x00dev_usb(rt2x00dev)); |
| 333 | struct data_ring *ring; |
| 334 | struct data_entry *entry; |
| 335 | unsigned int i; |
| 336 | |
| 337 | /* |
| 338 | * Initialize the TX rings |
| 339 | */ |
| 340 | txringall_for_each(rt2x00dev, ring) { |
| 341 | for (i = 0; i < ring->stats.limit; i++) |
| 342 | ring->entry[i].flags = 0; |
| 343 | |
| 344 | rt2x00_ring_index_clear(ring); |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Initialize and start the RX ring. |
| 349 | */ |
| 350 | rt2x00_ring_index_clear(rt2x00dev->rx); |
| 351 | |
| 352 | for (i = 0; i < rt2x00dev->rx->stats.limit; i++) { |
| 353 | entry = &rt2x00dev->rx->entry[i]; |
| 354 | |
| 355 | usb_fill_bulk_urb(entry->priv, usb_dev, |
| 356 | usb_rcvbulkpipe(usb_dev, 1), |
| 357 | entry->skb->data, entry->skb->len, |
| 358 | rt2x00usb_interrupt_rxdone, entry); |
| 359 | |
| 360 | __set_bit(ENTRY_OWNER_NIC, &entry->flags); |
| 361 | usb_submit_urb(entry->priv, GFP_ATOMIC); |
| 362 | } |
| 363 | } |
| 364 | EXPORT_SYMBOL_GPL(rt2x00usb_enable_radio); |
| 365 | |
| 366 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
| 367 | { |
| 368 | struct data_ring *ring; |
| 369 | unsigned int i; |
| 370 | |
| 371 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0x0000, 0x0000, |
| 372 | REGISTER_TIMEOUT); |
| 373 | |
| 374 | /* |
| 375 | * Cancel all rings. |
| 376 | */ |
| 377 | ring_for_each(rt2x00dev, ring) { |
| 378 | for (i = 0; i < ring->stats.limit; i++) |
| 379 | usb_kill_urb(ring->entry[i].priv); |
| 380 | } |
| 381 | } |
| 382 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); |
| 383 | |
| 384 | /* |
| 385 | * Device initialization handlers. |
| 386 | */ |
| 387 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
| 388 | struct data_ring *ring) |
| 389 | { |
| 390 | unsigned int i; |
| 391 | |
| 392 | /* |
| 393 | * Allocate the URB's |
| 394 | */ |
| 395 | for (i = 0; i < ring->stats.limit; i++) { |
| 396 | ring->entry[i].priv = usb_alloc_urb(0, GFP_KERNEL); |
| 397 | if (!ring->entry[i].priv) |
| 398 | return -ENOMEM; |
| 399 | } |
| 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, |
| 405 | struct data_ring *ring) |
| 406 | { |
| 407 | unsigned int i; |
| 408 | |
| 409 | if (!ring->entry) |
| 410 | return; |
| 411 | |
| 412 | for (i = 0; i < ring->stats.limit; i++) { |
| 413 | usb_kill_urb(ring->entry[i].priv); |
| 414 | usb_free_urb(ring->entry[i].priv); |
| 415 | if (ring->entry[i].skb) |
| 416 | kfree_skb(ring->entry[i].skb); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) |
| 421 | { |
| 422 | struct data_ring *ring; |
| 423 | struct sk_buff *skb; |
| 424 | unsigned int entry_size; |
| 425 | unsigned int i; |
| 426 | int status; |
| 427 | |
| 428 | /* |
| 429 | * Allocate DMA |
| 430 | */ |
| 431 | ring_for_each(rt2x00dev, ring) { |
| 432 | status = rt2x00usb_alloc_urb(rt2x00dev, ring); |
| 433 | if (status) |
| 434 | goto exit; |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * For the RX ring, skb's should be allocated. |
| 439 | */ |
| 440 | entry_size = rt2x00dev->rx->data_size + rt2x00dev->rx->desc_size; |
| 441 | for (i = 0; i < rt2x00dev->rx->stats.limit; i++) { |
| 442 | skb = dev_alloc_skb(NET_IP_ALIGN + entry_size); |
| 443 | if (!skb) |
| 444 | goto exit; |
| 445 | |
| 446 | skb_reserve(skb, NET_IP_ALIGN); |
| 447 | skb_put(skb, entry_size); |
| 448 | |
| 449 | rt2x00dev->rx->entry[i].skb = skb; |
| 450 | } |
| 451 | |
| 452 | return 0; |
| 453 | |
| 454 | exit: |
| 455 | rt2x00usb_uninitialize(rt2x00dev); |
| 456 | |
| 457 | return status; |
| 458 | } |
| 459 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); |
| 460 | |
| 461 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) |
| 462 | { |
| 463 | struct data_ring *ring; |
| 464 | |
| 465 | ring_for_each(rt2x00dev, ring) |
| 466 | rt2x00usb_free_urb(rt2x00dev, ring); |
| 467 | } |
| 468 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); |
| 469 | |
| 470 | /* |
| 471 | * USB driver handlers. |
| 472 | */ |
| 473 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) |
| 474 | { |
| 475 | kfree(rt2x00dev->rf); |
| 476 | rt2x00dev->rf = NULL; |
| 477 | |
| 478 | kfree(rt2x00dev->eeprom); |
| 479 | rt2x00dev->eeprom = NULL; |
| 480 | |
| 481 | kfree(rt2x00dev->csr_cache); |
| 482 | rt2x00dev->csr_cache = NULL; |
| 483 | } |
| 484 | |
| 485 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) |
| 486 | { |
| 487 | rt2x00dev->csr_cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
| 488 | if (!rt2x00dev->csr_cache) |
| 489 | goto exit; |
| 490 | |
| 491 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); |
| 492 | if (!rt2x00dev->eeprom) |
| 493 | goto exit; |
| 494 | |
| 495 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); |
| 496 | if (!rt2x00dev->rf) |
| 497 | goto exit; |
| 498 | |
| 499 | return 0; |
| 500 | |
| 501 | exit: |
| 502 | ERROR_PROBE("Failed to allocate registers.\n"); |
| 503 | |
| 504 | rt2x00usb_free_reg(rt2x00dev); |
| 505 | |
| 506 | return -ENOMEM; |
| 507 | } |
| 508 | |
| 509 | int rt2x00usb_probe(struct usb_interface *usb_intf, |
| 510 | const struct usb_device_id *id) |
| 511 | { |
| 512 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); |
| 513 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; |
| 514 | struct ieee80211_hw *hw; |
| 515 | struct rt2x00_dev *rt2x00dev; |
| 516 | int retval; |
| 517 | |
| 518 | usb_dev = usb_get_dev(usb_dev); |
| 519 | |
| 520 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); |
| 521 | if (!hw) { |
| 522 | ERROR_PROBE("Failed to allocate hardware.\n"); |
| 523 | retval = -ENOMEM; |
| 524 | goto exit_put_device; |
| 525 | } |
| 526 | |
| 527 | usb_set_intfdata(usb_intf, hw); |
| 528 | |
| 529 | rt2x00dev = hw->priv; |
| 530 | rt2x00dev->dev = usb_intf; |
| 531 | rt2x00dev->ops = ops; |
| 532 | rt2x00dev->hw = hw; |
Adam Baker | 3d82346 | 2007-10-27 13:43:29 +0200 | [diff] [blame^] | 533 | mutex_init(&rt2x00dev->usb_cache_mutex); |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 534 | |
Ivo van Doorn | b242e89 | 2007-11-15 23:41:31 +0100 | [diff] [blame] | 535 | rt2x00dev->usb_maxpacket = |
| 536 | usb_maxpacket(usb_dev, usb_sndbulkpipe(usb_dev, 1), 1); |
| 537 | if (!rt2x00dev->usb_maxpacket) |
| 538 | rt2x00dev->usb_maxpacket = 1; |
| 539 | |
Ivo van Doorn | 95ea362 | 2007-09-25 17:57:13 -0700 | [diff] [blame] | 540 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
| 541 | if (retval) |
| 542 | goto exit_free_device; |
| 543 | |
| 544 | retval = rt2x00lib_probe_dev(rt2x00dev); |
| 545 | if (retval) |
| 546 | goto exit_free_reg; |
| 547 | |
| 548 | return 0; |
| 549 | |
| 550 | exit_free_reg: |
| 551 | rt2x00usb_free_reg(rt2x00dev); |
| 552 | |
| 553 | exit_free_device: |
| 554 | ieee80211_free_hw(hw); |
| 555 | |
| 556 | exit_put_device: |
| 557 | usb_put_dev(usb_dev); |
| 558 | |
| 559 | usb_set_intfdata(usb_intf, NULL); |
| 560 | |
| 561 | return retval; |
| 562 | } |
| 563 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); |
| 564 | |
| 565 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) |
| 566 | { |
| 567 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); |
| 568 | struct rt2x00_dev *rt2x00dev = hw->priv; |
| 569 | |
| 570 | /* |
| 571 | * Free all allocated data. |
| 572 | */ |
| 573 | rt2x00lib_remove_dev(rt2x00dev); |
| 574 | rt2x00usb_free_reg(rt2x00dev); |
| 575 | ieee80211_free_hw(hw); |
| 576 | |
| 577 | /* |
| 578 | * Free the USB device data. |
| 579 | */ |
| 580 | usb_set_intfdata(usb_intf, NULL); |
| 581 | usb_put_dev(interface_to_usbdev(usb_intf)); |
| 582 | } |
| 583 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); |
| 584 | |
| 585 | #ifdef CONFIG_PM |
| 586 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) |
| 587 | { |
| 588 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); |
| 589 | struct rt2x00_dev *rt2x00dev = hw->priv; |
| 590 | int retval; |
| 591 | |
| 592 | retval = rt2x00lib_suspend(rt2x00dev, state); |
| 593 | if (retval) |
| 594 | return retval; |
| 595 | |
| 596 | rt2x00usb_free_reg(rt2x00dev); |
| 597 | |
| 598 | /* |
| 599 | * Decrease usbdev refcount. |
| 600 | */ |
| 601 | usb_put_dev(interface_to_usbdev(usb_intf)); |
| 602 | |
| 603 | return 0; |
| 604 | } |
| 605 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); |
| 606 | |
| 607 | int rt2x00usb_resume(struct usb_interface *usb_intf) |
| 608 | { |
| 609 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); |
| 610 | struct rt2x00_dev *rt2x00dev = hw->priv; |
| 611 | int retval; |
| 612 | |
| 613 | usb_get_dev(interface_to_usbdev(usb_intf)); |
| 614 | |
| 615 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
| 616 | if (retval) |
| 617 | return retval; |
| 618 | |
| 619 | retval = rt2x00lib_resume(rt2x00dev); |
| 620 | if (retval) |
| 621 | goto exit_free_reg; |
| 622 | |
| 623 | return 0; |
| 624 | |
| 625 | exit_free_reg: |
| 626 | rt2x00usb_free_reg(rt2x00dev); |
| 627 | |
| 628 | return retval; |
| 629 | } |
| 630 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); |
| 631 | #endif /* CONFIG_PM */ |
| 632 | |
| 633 | /* |
| 634 | * rt2x00pci module information. |
| 635 | */ |
| 636 | MODULE_AUTHOR(DRV_PROJECT); |
| 637 | MODULE_VERSION(DRV_VERSION); |
| 638 | MODULE_DESCRIPTION("rt2x00 library"); |
| 639 | MODULE_LICENSE("GPL"); |