ARM: mm: Recreate kernel mappings in early_paging_init()
[linux/fpc-iii.git] / drivers / net / wireless / ath / carl9170 / fw.c
blob47d5c2e910ad834d81c8c22fe368e191be3d6e32
1 /*
2 * Atheros CARL9170 driver
4 * firmware parser
6 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; see the file COPYING. If not, see
20 * http://www.gnu.org/licenses/.
23 #include <linux/kernel.h>
24 #include <linux/firmware.h>
25 #include <linux/crc32.h>
26 #include <linux/module.h>
27 #include "carl9170.h"
28 #include "fwcmd.h"
29 #include "version.h"
31 static const u8 otus_magic[4] = { OTUS_MAGIC };
33 static const void *carl9170_fw_find_desc(struct ar9170 *ar, const u8 descid[4],
34 const unsigned int len, const u8 compatible_revision)
36 const struct carl9170fw_desc_head *iter;
38 carl9170fw_for_each_hdr(iter, ar->fw.desc) {
39 if (carl9170fw_desc_cmp(iter, descid, len,
40 compatible_revision))
41 return (void *)iter;
44 /* needed to find the LAST desc */
45 if (carl9170fw_desc_cmp(iter, descid, len,
46 compatible_revision))
47 return (void *)iter;
49 return NULL;
52 static int carl9170_fw_verify_descs(struct ar9170 *ar,
53 const struct carl9170fw_desc_head *head, unsigned int max_len)
55 const struct carl9170fw_desc_head *pos;
56 unsigned long pos_addr, end_addr;
57 unsigned int pos_length;
59 if (max_len < sizeof(*pos))
60 return -ENODATA;
62 max_len = min_t(unsigned int, CARL9170FW_DESC_MAX_LENGTH, max_len);
64 pos = head;
65 pos_addr = (unsigned long) pos;
66 end_addr = pos_addr + max_len;
68 while (pos_addr < end_addr) {
69 if (pos_addr + sizeof(*head) > end_addr)
70 return -E2BIG;
72 pos_length = le16_to_cpu(pos->length);
74 if (pos_length < sizeof(*head))
75 return -EBADMSG;
77 if (pos_length > max_len)
78 return -EOVERFLOW;
80 if (pos_addr + pos_length > end_addr)
81 return -EMSGSIZE;
83 if (carl9170fw_desc_cmp(pos, LAST_MAGIC,
84 CARL9170FW_LAST_DESC_SIZE,
85 CARL9170FW_LAST_DESC_CUR_VER))
86 return 0;
88 pos_addr += pos_length;
89 pos = (void *)pos_addr;
90 max_len -= pos_length;
92 return -EINVAL;
95 static void carl9170_fw_info(struct ar9170 *ar)
97 const struct carl9170fw_motd_desc *motd_desc;
98 unsigned int str_ver_len;
99 u32 fw_date;
101 dev_info(&ar->udev->dev, "driver API: %s 2%03d-%02d-%02d [%d-%d]\n",
102 CARL9170FW_VERSION_GIT, CARL9170FW_VERSION_YEAR,
103 CARL9170FW_VERSION_MONTH, CARL9170FW_VERSION_DAY,
104 CARL9170FW_API_MIN_VER, CARL9170FW_API_MAX_VER);
106 motd_desc = carl9170_fw_find_desc(ar, MOTD_MAGIC,
107 sizeof(*motd_desc), CARL9170FW_MOTD_DESC_CUR_VER);
109 if (motd_desc) {
110 str_ver_len = strnlen(motd_desc->release,
111 CARL9170FW_MOTD_RELEASE_LEN);
113 fw_date = le32_to_cpu(motd_desc->fw_year_month_day);
115 dev_info(&ar->udev->dev, "firmware API: %.*s 2%03d-%02d-%02d\n",
116 str_ver_len, motd_desc->release,
117 CARL9170FW_GET_YEAR(fw_date),
118 CARL9170FW_GET_MONTH(fw_date),
119 CARL9170FW_GET_DAY(fw_date));
121 strlcpy(ar->hw->wiphy->fw_version, motd_desc->release,
122 sizeof(ar->hw->wiphy->fw_version));
126 static bool valid_dma_addr(const u32 address)
128 if (address >= AR9170_SRAM_OFFSET &&
129 address < (AR9170_SRAM_OFFSET + AR9170_SRAM_SIZE))
130 return true;
132 return false;
135 static bool valid_cpu_addr(const u32 address)
137 if (valid_dma_addr(address) || (address >= AR9170_PRAM_OFFSET &&
138 address < (AR9170_PRAM_OFFSET + AR9170_PRAM_SIZE)))
139 return true;
141 return false;
144 static int carl9170_fw_checksum(struct ar9170 *ar, const __u8 *data,
145 size_t len)
147 const struct carl9170fw_otus_desc *otus_desc;
148 const struct carl9170fw_last_desc *last_desc;
149 const struct carl9170fw_chk_desc *chk_desc;
150 unsigned long fin, diff;
151 unsigned int dsc_len;
152 u32 crc32;
154 last_desc = carl9170_fw_find_desc(ar, LAST_MAGIC,
155 sizeof(*last_desc), CARL9170FW_LAST_DESC_CUR_VER);
156 if (!last_desc)
157 return -EINVAL;
159 otus_desc = carl9170_fw_find_desc(ar, OTUS_MAGIC,
160 sizeof(*otus_desc), CARL9170FW_OTUS_DESC_CUR_VER);
161 if (!otus_desc) {
162 dev_err(&ar->udev->dev, "failed to find compatible firmware "
163 "descriptor.\n");
164 return -ENODATA;
167 chk_desc = carl9170_fw_find_desc(ar, CHK_MAGIC,
168 sizeof(*chk_desc), CARL9170FW_CHK_DESC_CUR_VER);
170 if (!chk_desc) {
171 dev_warn(&ar->udev->dev, "Unprotected firmware image.\n");
172 return 0;
175 dsc_len = min_t(unsigned int, len,
176 (unsigned long)chk_desc - (unsigned long)otus_desc);
178 fin = (unsigned long) last_desc + sizeof(*last_desc);
179 diff = fin - (unsigned long) otus_desc;
181 if (diff < len)
182 len -= diff;
184 if (len < 256)
185 return -EIO;
187 crc32 = crc32_le(~0, data, len);
188 if (cpu_to_le32(crc32) != chk_desc->fw_crc32) {
189 dev_err(&ar->udev->dev, "fw checksum test failed.\n");
190 return -ENOEXEC;
193 crc32 = crc32_le(crc32, (void *)otus_desc, dsc_len);
194 if (cpu_to_le32(crc32) != chk_desc->hdr_crc32) {
195 dev_err(&ar->udev->dev, "descriptor check failed.\n");
196 return -EINVAL;
198 return 0;
201 static int carl9170_fw_tx_sequence(struct ar9170 *ar)
203 const struct carl9170fw_txsq_desc *txsq_desc;
205 txsq_desc = carl9170_fw_find_desc(ar, TXSQ_MAGIC, sizeof(*txsq_desc),
206 CARL9170FW_TXSQ_DESC_CUR_VER);
207 if (txsq_desc) {
208 ar->fw.tx_seq_table = le32_to_cpu(txsq_desc->seq_table_addr);
209 if (!valid_cpu_addr(ar->fw.tx_seq_table))
210 return -EINVAL;
211 } else {
212 ar->fw.tx_seq_table = 0;
215 return 0;
218 static void carl9170_fw_set_if_combinations(struct ar9170 *ar,
219 u16 if_comb_types)
221 if (ar->fw.vif_num < 2)
222 return;
224 ar->if_comb_limits[0].max = ar->fw.vif_num;
225 ar->if_comb_limits[0].types = if_comb_types;
227 ar->if_combs[0].num_different_channels = 1;
228 ar->if_combs[0].max_interfaces = ar->fw.vif_num;
229 ar->if_combs[0].limits = ar->if_comb_limits;
230 ar->if_combs[0].n_limits = ARRAY_SIZE(ar->if_comb_limits);
232 ar->hw->wiphy->iface_combinations = ar->if_combs;
233 ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ar->if_combs);
236 static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
238 const struct carl9170fw_otus_desc *otus_desc;
239 int err;
240 u16 if_comb_types;
242 err = carl9170_fw_checksum(ar, data, len);
243 if (err)
244 return err;
246 otus_desc = carl9170_fw_find_desc(ar, OTUS_MAGIC,
247 sizeof(*otus_desc), CARL9170FW_OTUS_DESC_CUR_VER);
248 if (!otus_desc) {
249 return -ENODATA;
252 #define SUPP(feat) \
253 (carl9170fw_supports(otus_desc->feature_set, feat))
255 if (!SUPP(CARL9170FW_DUMMY_FEATURE)) {
256 dev_err(&ar->udev->dev, "invalid firmware descriptor "
257 "format detected.\n");
258 return -EINVAL;
261 ar->fw.api_version = otus_desc->api_ver;
263 if (ar->fw.api_version < CARL9170FW_API_MIN_VER ||
264 ar->fw.api_version > CARL9170FW_API_MAX_VER) {
265 dev_err(&ar->udev->dev, "unsupported firmware api version.\n");
266 return -EINVAL;
269 if (!SUPP(CARL9170FW_COMMAND_PHY) || SUPP(CARL9170FW_UNUSABLE) ||
270 !SUPP(CARL9170FW_HANDLE_BACK_REQ)) {
271 dev_err(&ar->udev->dev, "firmware does support "
272 "mandatory features.\n");
273 return -ECANCELED;
276 if (ilog2(le32_to_cpu(otus_desc->feature_set)) >=
277 __CARL9170FW_FEATURE_NUM) {
278 dev_warn(&ar->udev->dev, "driver does not support all "
279 "firmware features.\n");
282 if (!SUPP(CARL9170FW_COMMAND_CAM)) {
283 dev_info(&ar->udev->dev, "crypto offloading is disabled "
284 "by firmware.\n");
285 ar->fw.disable_offload_fw = true;
288 if (SUPP(CARL9170FW_PSM) && SUPP(CARL9170FW_FIXED_5GHZ_PSM))
289 ar->hw->flags |= IEEE80211_HW_SUPPORTS_PS;
291 if (!SUPP(CARL9170FW_USB_INIT_FIRMWARE)) {
292 dev_err(&ar->udev->dev, "firmware does not provide "
293 "mandatory interfaces.\n");
294 return -EINVAL;
297 if (SUPP(CARL9170FW_MINIBOOT))
298 ar->fw.offset = le16_to_cpu(otus_desc->miniboot_size);
299 else
300 ar->fw.offset = 0;
302 if (SUPP(CARL9170FW_USB_DOWN_STREAM)) {
303 ar->hw->extra_tx_headroom += sizeof(struct ar9170_stream);
304 ar->fw.tx_stream = true;
307 if (SUPP(CARL9170FW_USB_UP_STREAM))
308 ar->fw.rx_stream = true;
310 if (SUPP(CARL9170FW_RX_FILTER)) {
311 ar->fw.rx_filter = true;
312 ar->rx_filter_caps = FIF_FCSFAIL | FIF_PLCPFAIL |
313 FIF_CONTROL | FIF_PSPOLL | FIF_OTHER_BSS |
314 FIF_PROMISC_IN_BSS;
317 if (SUPP(CARL9170FW_HW_COUNTERS))
318 ar->fw.hw_counters = true;
320 if (SUPP(CARL9170FW_WOL))
321 device_set_wakeup_enable(&ar->udev->dev, true);
323 if (SUPP(CARL9170FW_RX_BA_FILTER))
324 ar->fw.ba_filter = true;
326 if_comb_types = BIT(NL80211_IFTYPE_STATION) |
327 BIT(NL80211_IFTYPE_P2P_CLIENT);
329 ar->fw.vif_num = otus_desc->vif_num;
330 ar->fw.cmd_bufs = otus_desc->cmd_bufs;
331 ar->fw.address = le32_to_cpu(otus_desc->fw_address);
332 ar->fw.rx_size = le16_to_cpu(otus_desc->rx_max_frame_len);
333 ar->fw.mem_blocks = min_t(unsigned int, otus_desc->tx_descs, 0xfe);
334 atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks);
335 ar->fw.mem_block_size = le16_to_cpu(otus_desc->tx_frag_len);
337 if (ar->fw.vif_num >= AR9170_MAX_VIRTUAL_MAC || !ar->fw.vif_num ||
338 ar->fw.mem_blocks < 16 || !ar->fw.cmd_bufs ||
339 ar->fw.mem_block_size < 64 || ar->fw.mem_block_size > 512 ||
340 ar->fw.rx_size > 32768 || ar->fw.rx_size < 4096 ||
341 !valid_cpu_addr(ar->fw.address)) {
342 dev_err(&ar->udev->dev, "firmware shows obvious signs of "
343 "malicious tampering.\n");
344 return -EINVAL;
347 ar->fw.beacon_addr = le32_to_cpu(otus_desc->bcn_addr);
348 ar->fw.beacon_max_len = le16_to_cpu(otus_desc->bcn_len);
350 if (valid_dma_addr(ar->fw.beacon_addr) && ar->fw.beacon_max_len >=
351 AR9170_MAC_BCN_LENGTH_MAX) {
352 ar->hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_ADHOC);
354 if (SUPP(CARL9170FW_WLANTX_CAB)) {
355 if_comb_types |=
356 BIT(NL80211_IFTYPE_AP) |
357 BIT(NL80211_IFTYPE_P2P_GO);
359 #ifdef CONFIG_MAC80211_MESH
360 if_comb_types |=
361 BIT(NL80211_IFTYPE_MESH_POINT);
362 #endif /* CONFIG_MAC80211_MESH */
366 carl9170_fw_set_if_combinations(ar, if_comb_types);
368 ar->hw->wiphy->interface_modes |= if_comb_types;
370 ar->hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
372 /* As IBSS Encryption is software-based, IBSS RSN is supported. */
373 ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
374 WIPHY_FLAG_IBSS_RSN | WIPHY_FLAG_SUPPORTS_TDLS;
376 #undef SUPPORTED
377 return carl9170_fw_tx_sequence(ar);
380 static struct carl9170fw_desc_head *
381 carl9170_find_fw_desc(struct ar9170 *ar, const __u8 *fw_data, const size_t len)
384 int scan = 0, found = 0;
386 if (!carl9170fw_size_check(len)) {
387 dev_err(&ar->udev->dev, "firmware size is out of bound.\n");
388 return NULL;
391 while (scan < len - sizeof(struct carl9170fw_desc_head)) {
392 if (fw_data[scan++] == otus_magic[found])
393 found++;
394 else
395 found = 0;
397 if (scan >= len)
398 break;
400 if (found == sizeof(otus_magic))
401 break;
404 if (found != sizeof(otus_magic))
405 return NULL;
407 return (void *)&fw_data[scan - found];
410 int carl9170_parse_firmware(struct ar9170 *ar)
412 const struct carl9170fw_desc_head *fw_desc = NULL;
413 const struct firmware *fw = ar->fw.fw;
414 unsigned long header_offset = 0;
415 int err;
417 if (WARN_ON(!fw))
418 return -EINVAL;
420 fw_desc = carl9170_find_fw_desc(ar, fw->data, fw->size);
422 if (!fw_desc) {
423 dev_err(&ar->udev->dev, "unsupported firmware.\n");
424 return -ENODATA;
427 header_offset = (unsigned long)fw_desc - (unsigned long)fw->data;
429 err = carl9170_fw_verify_descs(ar, fw_desc, fw->size - header_offset);
430 if (err) {
431 dev_err(&ar->udev->dev, "damaged firmware (%d).\n", err);
432 return err;
435 ar->fw.desc = fw_desc;
437 carl9170_fw_info(ar);
439 err = carl9170_fw(ar, fw->data, fw->size);
440 if (err) {
441 dev_err(&ar->udev->dev, "failed to parse firmware (%d).\n",
442 err);
443 return err;
446 return 0;