1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (c) 2010 Broadcom Corporation
4 */
5
6 #include <linux/kernel.h>
7 #include <linux/string.h>
8 #include <linux/netdevice.h>
9 #include <linux/module.h>
10 #include <linux/firmware.h>
11 #include <brcmu_wifi.h>
12 #include <brcmu_utils.h>
13 #include "core.h"
14 #include "bus.h"
15 #include "debug.h"
16 #include "fwil.h"
17 #include "fwil_types.h"
18 #include "tracepoint.h"
19 #include "common.h"
20 #include "of.h"
21 #include "firmware.h"
22 #include "chip.h"
23
24 MODULE_AUTHOR("Broadcom Corporation");
25 MODULE_DESCRIPTION("Broadcom 802.11 wireless LAN fullmac driver.");
26 MODULE_LICENSE("Dual BSD/GPL");
27
28 #define BRCMF_DEFAULT_SCAN_CHANNEL_TIME 40
29 #define BRCMF_DEFAULT_SCAN_UNASSOC_TIME 40
30
31 /* default boost value for RSSI_DELTA in preferred join selection */
32 #define BRCMF_JOIN_PREF_RSSI_BOOST 8
33
34 #define BRCMF_DEFAULT_TXGLOM_SIZE 32 /* max tx frames in glom chain */
35
36 static int brcmf_sdiod_txglomsz = BRCMF_DEFAULT_TXGLOM_SIZE;
37 module_param_named(txglomsz, brcmf_sdiod_txglomsz, int, 0);
38 MODULE_PARM_DESC(txglomsz, "Maximum tx packet chain size [SDIO]");
39
40 /* Debug level configuration. See debug.h for bits, sysfs modifiable */
41 int brcmf_msg_level;
42 module_param_named(debug, brcmf_msg_level, int, 0600);
43 MODULE_PARM_DESC(debug, "Level of debug output");
44
45 static int brcmf_p2p_enable;
46 module_param_named(p2pon, brcmf_p2p_enable, int, 0);
47 MODULE_PARM_DESC(p2pon, "Enable legacy p2p management functionality");
48
49 static int brcmf_feature_disable;
50 module_param_named(feature_disable, brcmf_feature_disable, int, 0);
51 MODULE_PARM_DESC(feature_disable, "Disable features");
52
53 static char brcmf_firmware_path[BRCMF_FW_ALTPATH_LEN];
54 module_param_string(alternative_fw_path, brcmf_firmware_path,
55 BRCMF_FW_ALTPATH_LEN, 0400);
56 MODULE_PARM_DESC(alternative_fw_path, "Alternative firmware path");
57
58 static int brcmf_fcmode;
59 module_param_named(fcmode, brcmf_fcmode, int, 0);
60 MODULE_PARM_DESC(fcmode, "Mode of firmware signalled flow control");
61
62 static int brcmf_roamoff;
63 module_param_named(roamoff, brcmf_roamoff, int, 0400);
64 MODULE_PARM_DESC(roamoff, "Do not use internal roaming engine");
65
66 static int brcmf_iapp_enable;
67 module_param_named(iapp, brcmf_iapp_enable, int, 0);
68 MODULE_PARM_DESC(iapp, "Enable partial support for the obsoleted Inter-Access Point Protocol");
69
70 #ifdef DEBUG
71 /* always succeed brcmf_bus_started() */
72 static int brcmf_ignore_probe_fail;
73 module_param_named(ignore_probe_fail, brcmf_ignore_probe_fail, int, 0);
74 MODULE_PARM_DESC(ignore_probe_fail, "always succeed probe for debugging");
75 #endif
76
77 static struct brcmfmac_platform_data *brcmfmac_pdata;
78 struct brcmf_mp_global_t brcmf_mp_global;
79
brcmf_c_set_joinpref_default(struct brcmf_if * ifp)80 void brcmf_c_set_joinpref_default(struct brcmf_if *ifp)
81 {
82 struct brcmf_pub *drvr = ifp->drvr;
83 struct brcmf_join_pref_params join_pref_params[2];
84 int err;
85
86 /* Setup join_pref to select target by RSSI (boost on 5GHz) */
87 join_pref_params[0].type = BRCMF_JOIN_PREF_RSSI_DELTA;
88 join_pref_params[0].len = 2;
89 join_pref_params[0].rssi_gain = BRCMF_JOIN_PREF_RSSI_BOOST;
90 join_pref_params[0].band = WLC_BAND_5G;
91
92 join_pref_params[1].type = BRCMF_JOIN_PREF_RSSI;
93 join_pref_params[1].len = 2;
94 join_pref_params[1].rssi_gain = 0;
95 join_pref_params[1].band = 0;
96 err = brcmf_fil_iovar_data_set(ifp, "join_pref", join_pref_params,
97 sizeof(join_pref_params));
98 if (err)
99 bphy_err(drvr, "Set join_pref error (%d)\n", err);
100 }
101
brcmf_c_download(struct brcmf_if * ifp,u16 flag,struct brcmf_dload_data_le * dload_buf,u32 len)102 static int brcmf_c_download(struct brcmf_if *ifp, u16 flag,
103 struct brcmf_dload_data_le *dload_buf,
104 u32 len)
105 {
106 s32 err;
107
108 flag |= (DLOAD_HANDLER_VER << DLOAD_FLAG_VER_SHIFT);
109 dload_buf->flag = cpu_to_le16(flag);
110 dload_buf->dload_type = cpu_to_le16(DL_TYPE_CLM);
111 dload_buf->len = cpu_to_le32(len);
112 dload_buf->crc = cpu_to_le32(0);
113 len = sizeof(*dload_buf) + len - 1;
114
115 err = brcmf_fil_iovar_data_set(ifp, "clmload", dload_buf, len);
116
117 return err;
118 }
119
brcmf_c_process_clm_blob(struct brcmf_if * ifp)120 static int brcmf_c_process_clm_blob(struct brcmf_if *ifp)
121 {
122 struct brcmf_pub *drvr = ifp->drvr;
123 struct brcmf_bus *bus = drvr->bus_if;
124 struct brcmf_dload_data_le *chunk_buf;
125 const struct firmware *clm = NULL;
126 u8 clm_name[BRCMF_FW_NAME_LEN];
127 u32 chunk_len;
128 u32 datalen;
129 u32 cumulative_len;
130 u16 dl_flag = DL_BEGIN;
131 u32 status;
132 s32 err;
133
134 brcmf_dbg(TRACE, "Enter\n");
135
136 memset(clm_name, 0, sizeof(clm_name));
137 err = brcmf_bus_get_fwname(bus, ".clm_blob", clm_name);
138 if (err) {
139 bphy_err(drvr, "get CLM blob file name failed (%d)\n", err);
140 return err;
141 }
142
143 err = firmware_request_nowarn(&clm, clm_name, bus->dev);
144 if (err) {
145 brcmf_info("no clm_blob available (err=%d), device may have limited channels available\n",
146 err);
147 return 0;
148 }
149
150 chunk_buf = kzalloc(sizeof(*chunk_buf) + MAX_CHUNK_LEN - 1, GFP_KERNEL);
151 if (!chunk_buf) {
152 err = -ENOMEM;
153 goto done;
154 }
155
156 datalen = clm->size;
157 cumulative_len = 0;
158 do {
159 if (datalen > MAX_CHUNK_LEN) {
160 chunk_len = MAX_CHUNK_LEN;
161 } else {
162 chunk_len = datalen;
163 dl_flag |= DL_END;
164 }
165 memcpy(chunk_buf->data, clm->data + cumulative_len, chunk_len);
166
167 err = brcmf_c_download(ifp, dl_flag, chunk_buf, chunk_len);
168
169 dl_flag &= ~DL_BEGIN;
170
171 cumulative_len += chunk_len;
172 datalen -= chunk_len;
173 } while ((datalen > 0) && (err == 0));
174
175 if (err) {
176 bphy_err(drvr, "clmload (%zu byte file) failed (%d)\n",
177 clm->size, err);
178 /* Retrieve clmload_status and print */
179 err = brcmf_fil_iovar_int_get(ifp, "clmload_status", &status);
180 if (err)
181 bphy_err(drvr, "get clmload_status failed (%d)\n", err);
182 else
183 brcmf_dbg(INFO, "clmload_status=%d\n", status);
184 err = -EIO;
185 }
186
187 kfree(chunk_buf);
188 done:
189 release_firmware(clm);
190 return err;
191 }
192
brcmf_c_preinit_dcmds(struct brcmf_if * ifp)193 int brcmf_c_preinit_dcmds(struct brcmf_if *ifp)
194 {
195 struct brcmf_pub *drvr = ifp->drvr;
196 s8 eventmask[BRCMF_EVENTING_MASK_LEN];
197 u8 buf[BRCMF_DCMD_SMLEN];
198 struct brcmf_bus *bus;
199 struct brcmf_rev_info_le revinfo;
200 struct brcmf_rev_info *ri;
201 char *clmver;
202 char *ptr;
203 s32 err;
204
205 /* retreive mac address */
206 err = brcmf_fil_iovar_data_get(ifp, "cur_etheraddr", ifp->mac_addr,
207 sizeof(ifp->mac_addr));
208 if (err < 0) {
209 bphy_err(drvr, "Retrieving cur_etheraddr failed, %d\n", err);
210 goto done;
211 }
212 memcpy(ifp->drvr->mac, ifp->mac_addr, sizeof(ifp->drvr->mac));
213 memcpy(ifp->drvr->wiphy->perm_addr, ifp->drvr->mac, ETH_ALEN);
214
215 bus = ifp->drvr->bus_if;
216 ri = &ifp->drvr->revinfo;
217
218 err = brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_REVINFO,
219 &revinfo, sizeof(revinfo));
220 if (err < 0) {
221 bphy_err(drvr, "retrieving revision info failed, %d\n", err);
222 strlcpy(ri->chipname, "UNKNOWN", sizeof(ri->chipname));
223 } else {
224 ri->vendorid = le32_to_cpu(revinfo.vendorid);
225 ri->deviceid = le32_to_cpu(revinfo.deviceid);
226 ri->radiorev = le32_to_cpu(revinfo.radiorev);
227 ri->corerev = le32_to_cpu(revinfo.corerev);
228 ri->boardid = le32_to_cpu(revinfo.boardid);
229 ri->boardvendor = le32_to_cpu(revinfo.boardvendor);
230 ri->boardrev = le32_to_cpu(revinfo.boardrev);
231 ri->driverrev = le32_to_cpu(revinfo.driverrev);
232 ri->ucoderev = le32_to_cpu(revinfo.ucoderev);
233 ri->bus = le32_to_cpu(revinfo.bus);
234 ri->phytype = le32_to_cpu(revinfo.phytype);
235 ri->phyrev = le32_to_cpu(revinfo.phyrev);
236 ri->anarev = le32_to_cpu(revinfo.anarev);
237 ri->chippkg = le32_to_cpu(revinfo.chippkg);
238 ri->nvramrev = le32_to_cpu(revinfo.nvramrev);
239
240 /* use revinfo if not known yet */
241 if (!bus->chip) {
242 bus->chip = le32_to_cpu(revinfo.chipnum);
243 bus->chiprev = le32_to_cpu(revinfo.chiprev);
244 }
245 }
246 ri->result = err;
247
248 if (bus->chip)
249 brcmf_chip_name(bus->chip, bus->chiprev,
250 ri->chipname, sizeof(ri->chipname));
251
252 /* Do any CLM downloading */
253 err = brcmf_c_process_clm_blob(ifp);
254 if (err < 0) {
255 bphy_err(drvr, "download CLM blob file failed, %d\n", err);
256 goto done;
257 }
258
259 /* query for 'ver' to get version info from firmware */
260 memset(buf, 0, sizeof(buf));
261 err = brcmf_fil_iovar_data_get(ifp, "ver", buf, sizeof(buf));
262 if (err < 0) {
263 bphy_err(drvr, "Retrieving version information failed, %d\n",
264 err);
265 goto done;
266 }
267 buf[sizeof(buf) - 1] = '\0';
268 ptr = (char *)buf;
269 strsep(&ptr, "\n");
270
271 /* Print fw version info */
272 brcmf_info("Firmware: %s %s\n", ri->chipname, buf);
273
274 /* locate firmware version number for ethtool */
275 ptr = strrchr(buf, ' ') + 1;
276 strlcpy(ifp->drvr->fwver, ptr, sizeof(ifp->drvr->fwver));
277
278 /* Query for 'clmver' to get CLM version info from firmware */
279 memset(buf, 0, sizeof(buf));
280 err = brcmf_fil_iovar_data_get(ifp, "clmver", buf, sizeof(buf));
281 if (err) {
282 brcmf_dbg(TRACE, "retrieving clmver failed, %d\n", err);
283 } else {
284 buf[sizeof(buf) - 1] = '\0';
285 clmver = (char *)buf;
286
287 /* Replace all newline/linefeed characters with space
288 * character
289 */
290 strreplace(clmver, '\n', ' ');
291
292 /* store CLM version for adding it to revinfo debugfs file */
293 memcpy(ifp->drvr->clmver, clmver, sizeof(ifp->drvr->clmver));
294
295 brcmf_dbg(INFO, "CLM version = %s\n", clmver);
296 }
297
298 /* set mpc */
299 err = brcmf_fil_iovar_int_set(ifp, "mpc", 1);
300 if (err) {
301 bphy_err(drvr, "failed setting mpc\n");
302 goto done;
303 }
304
305 brcmf_c_set_joinpref_default(ifp);
306
307 /* Setup event_msgs, enable E_IF */
308 err = brcmf_fil_iovar_data_get(ifp, "event_msgs", eventmask,
309 BRCMF_EVENTING_MASK_LEN);
310 if (err) {
311 bphy_err(drvr, "Get event_msgs error (%d)\n", err);
312 goto done;
313 }
314 setbit(eventmask, BRCMF_E_IF);
315 err = brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask,
316 BRCMF_EVENTING_MASK_LEN);
317 if (err) {
318 bphy_err(drvr, "Set event_msgs error (%d)\n", err);
319 goto done;
320 }
321
322 /* Setup default scan channel time */
323 err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_CHANNEL_TIME,
324 BRCMF_DEFAULT_SCAN_CHANNEL_TIME);
325 if (err) {
326 bphy_err(drvr, "BRCMF_C_SET_SCAN_CHANNEL_TIME error (%d)\n",
327 err);
328 goto done;
329 }
330
331 /* Setup default scan unassoc time */
332 err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_UNASSOC_TIME,
333 BRCMF_DEFAULT_SCAN_UNASSOC_TIME);
334 if (err) {
335 bphy_err(drvr, "BRCMF_C_SET_SCAN_UNASSOC_TIME error (%d)\n",
336 err);
337 goto done;
338 }
339
340 /* Enable tx beamforming, errors can be ignored (not supported) */
341 (void)brcmf_fil_iovar_int_set(ifp, "txbf", 1);
342 done:
343 return err;
344 }
345
346 #ifndef CONFIG_BRCM_TRACING
__brcmf_err(struct brcmf_bus * bus,const char * func,const char * fmt,...)347 void __brcmf_err(struct brcmf_bus *bus, const char *func, const char *fmt, ...)
348 {
349 struct va_format vaf;
350 va_list args;
351
352 va_start(args, fmt);
353
354 vaf.fmt = fmt;
355 vaf.va = &args;
356 if (bus)
357 dev_err(bus->dev, "%s: %pV", func, &vaf);
358 else
359 pr_err("%s: %pV", func, &vaf);
360
361 va_end(args);
362 }
363 #endif
364
365 #if defined(CONFIG_BRCM_TRACING) || defined(CONFIG_BRCMDBG)
__brcmf_dbg(u32 level,const char * func,const char * fmt,...)366 void __brcmf_dbg(u32 level, const char *func, const char *fmt, ...)
367 {
368 struct va_format vaf = {
369 .fmt = fmt,
370 };
371 va_list args;
372
373 va_start(args, fmt);
374 vaf.va = &args;
375 if (brcmf_msg_level & level)
376 pr_debug("%s %pV", func, &vaf);
377 trace_brcmf_dbg(level, func, &vaf);
378 va_end(args);
379 }
380 #endif
381
brcmf_mp_attach(void)382 static void brcmf_mp_attach(void)
383 {
384 /* If module param firmware path is set then this will always be used,
385 * if not set then if available use the platform data version. To make
386 * sure it gets initialized at all, always copy the module param version
387 */
388 strlcpy(brcmf_mp_global.firmware_path, brcmf_firmware_path,
389 BRCMF_FW_ALTPATH_LEN);
390 if ((brcmfmac_pdata) && (brcmfmac_pdata->fw_alternative_path) &&
391 (brcmf_mp_global.firmware_path[0] == '\0')) {
392 strlcpy(brcmf_mp_global.firmware_path,
393 brcmfmac_pdata->fw_alternative_path,
394 BRCMF_FW_ALTPATH_LEN);
395 }
396 }
397
brcmf_get_module_param(struct device * dev,enum brcmf_bus_type bus_type,u32 chip,u32 chiprev)398 struct brcmf_mp_device *brcmf_get_module_param(struct device *dev,
399 enum brcmf_bus_type bus_type,
400 u32 chip, u32 chiprev)
401 {
402 struct brcmf_mp_device *settings;
403 struct brcmfmac_pd_device *device_pd;
404 bool found;
405 int i;
406
407 brcmf_dbg(INFO, "Enter, bus=%d, chip=%d, rev=%d\n", bus_type, chip,
408 chiprev);
409 settings = kzalloc(sizeof(*settings), GFP_ATOMIC);
410 if (!settings)
411 return NULL;
412
413 /* start by using the module paramaters */
414 settings->p2p_enable = !!brcmf_p2p_enable;
415 settings->feature_disable = brcmf_feature_disable;
416 settings->fcmode = brcmf_fcmode;
417 settings->roamoff = !!brcmf_roamoff;
418 settings->iapp = !!brcmf_iapp_enable;
419 #ifdef DEBUG
420 settings->ignore_probe_fail = !!brcmf_ignore_probe_fail;
421 #endif
422
423 if (bus_type == BRCMF_BUSTYPE_SDIO)
424 settings->bus.sdio.txglomsz = brcmf_sdiod_txglomsz;
425
426 /* See if there is any device specific platform data configured */
427 found = false;
428 if (brcmfmac_pdata) {
429 for (i = 0; i < brcmfmac_pdata->device_count; i++) {
430 device_pd = &brcmfmac_pdata->devices[i];
431 if ((device_pd->bus_type == bus_type) &&
432 (device_pd->id == chip) &&
433 ((device_pd->rev == chiprev) ||
434 (device_pd->rev == -1))) {
435 brcmf_dbg(INFO, "Platform data for device found\n");
436 settings->country_codes =
437 device_pd->country_codes;
438 if (device_pd->bus_type == BRCMF_BUSTYPE_SDIO)
439 memcpy(&settings->bus.sdio,
440 &device_pd->bus.sdio,
441 sizeof(settings->bus.sdio));
442 found = true;
443 break;
444 }
445 }
446 }
447 if (!found) {
448 /* No platform data for this device, try OF and DMI data */
449 brcmf_dmi_probe(settings, chip, chiprev);
450 brcmf_of_probe(dev, bus_type, settings);
451 }
452 return settings;
453 }
454
brcmf_release_module_param(struct brcmf_mp_device * module_param)455 void brcmf_release_module_param(struct brcmf_mp_device *module_param)
456 {
457 kfree(module_param);
458 }
459
brcmf_common_pd_probe(struct platform_device * pdev)460 static int __init brcmf_common_pd_probe(struct platform_device *pdev)
461 {
462 brcmf_dbg(INFO, "Enter\n");
463
464 brcmfmac_pdata = dev_get_platdata(&pdev->dev);
465
466 if (brcmfmac_pdata->power_on)
467 brcmfmac_pdata->power_on();
468
469 return 0;
470 }
471
brcmf_common_pd_remove(struct platform_device * pdev)472 static int brcmf_common_pd_remove(struct platform_device *pdev)
473 {
474 brcmf_dbg(INFO, "Enter\n");
475
476 if (brcmfmac_pdata->power_off)
477 brcmfmac_pdata->power_off();
478
479 return 0;
480 }
481
482 static struct platform_driver brcmf_pd = {
483 .remove = brcmf_common_pd_remove,
484 .driver = {
485 .name = BRCMFMAC_PDATA_NAME,
486 }
487 };
488
brcmfmac_module_init(void)489 static int __init brcmfmac_module_init(void)
490 {
491 int err;
492
493 /* Get the platform data (if available) for our devices */
494 err = platform_driver_probe(&brcmf_pd, brcmf_common_pd_probe);
495 if (err == -ENODEV)
496 brcmf_dbg(INFO, "No platform data available.\n");
497
498 /* Initialize global module paramaters */
499 brcmf_mp_attach();
500
501 /* Continue the initialization by registering the different busses */
502 err = brcmf_core_init();
503 if (err) {
504 if (brcmfmac_pdata)
505 platform_driver_unregister(&brcmf_pd);
506 }
507
508 return err;
509 }
510
brcmfmac_module_exit(void)511 static void __exit brcmfmac_module_exit(void)
512 {
513 brcmf_core_exit();
514 if (brcmfmac_pdata)
515 platform_driver_unregister(&brcmf_pd);
516 }
517
518 module_init(brcmfmac_module_init);
519 module_exit(brcmfmac_module_exit);
520
521