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drm/rockchip: Don't change hdmi reference clock rate
[drm/drm-misc.git] / drivers / net / wireless / silabs / wfx / main.c
blob64441c8bc4606cd4e6c4f245190f4864cf500a41
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Device probe and register.
4 *
5 * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
6 * Copyright (c) 2010, ST-Ericsson
7 * Copyright (c) 2008, Johannes Berg <johannes@sipsolutions.net>
8 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
9 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
10 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
11 * Copyright (c) 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
12 */
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/of_net.h>
16 #include <linux/gpio/consumer.h>
17 #include <linux/mmc/sdio_func.h>
18 #include <linux/spi/spi.h>
19 #include <linux/etherdevice.h>
20 #include <linux/firmware.h>
21
22 #include "main.h"
23 #include "wfx.h"
24 #include "fwio.h"
25 #include "hwio.h"
26 #include "bus.h"
27 #include "bh.h"
28 #include "sta.h"
29 #include "key.h"
30 #include "scan.h"
31 #include "debug.h"
32 #include "data_tx.h"
33 #include "hif_tx_mib.h"
34 #include "hif_api_cmd.h"
35
36 #define WFX_PDS_TLV_TYPE 0x4450 // "PD" (Platform Data) in ascii little-endian
37 #define WFX_PDS_MAX_CHUNK_SIZE 1500
38
39 MODULE_DESCRIPTION("Silicon Labs 802.11 Wireless LAN driver for WF200");
40 MODULE_AUTHOR("Jérôme Pouiller <jerome.pouiller@silabs.com>");
41 MODULE_LICENSE("GPL");
42
43 #define RATETAB_ENT(_rate, _rateid, _flags) { \
44 .bitrate = (_rate), \
45 .hw_value = (_rateid), \
46 .flags = (_flags), \
47 }
48
49 static struct ieee80211_rate wfx_rates[] = {
50 RATETAB_ENT(10, 0, 0),
51 RATETAB_ENT(20, 1, IEEE80211_RATE_SHORT_PREAMBLE),
52 RATETAB_ENT(55, 2, IEEE80211_RATE_SHORT_PREAMBLE),
53 RATETAB_ENT(110, 3, IEEE80211_RATE_SHORT_PREAMBLE),
54 RATETAB_ENT(60, 6, 0),
55 RATETAB_ENT(90, 7, 0),
56 RATETAB_ENT(120, 8, 0),
57 RATETAB_ENT(180, 9, 0),
58 RATETAB_ENT(240, 10, 0),
59 RATETAB_ENT(360, 11, 0),
60 RATETAB_ENT(480, 12, 0),
61 RATETAB_ENT(540, 13, 0),
62 };
63
64 #define CHAN2G(_channel, _freq, _flags) { \
65 .band = NL80211_BAND_2GHZ, \
66 .center_freq = (_freq), \
67 .hw_value = (_channel), \
68 .flags = (_flags), \
69 .max_antenna_gain = 0, \
70 .max_power = 30, \
71 }
72
73 static struct ieee80211_channel wfx_2ghz_chantable[] = {
74 CHAN2G(1, 2412, 0),
75 CHAN2G(2, 2417, 0),
76 CHAN2G(3, 2422, 0),
77 CHAN2G(4, 2427, 0),
78 CHAN2G(5, 2432, 0),
79 CHAN2G(6, 2437, 0),
80 CHAN2G(7, 2442, 0),
81 CHAN2G(8, 2447, 0),
82 CHAN2G(9, 2452, 0),
83 CHAN2G(10, 2457, 0),
84 CHAN2G(11, 2462, 0),
85 CHAN2G(12, 2467, 0),
86 CHAN2G(13, 2472, 0),
87 CHAN2G(14, 2484, 0),
88 };
89
90 static const struct ieee80211_supported_band wfx_band_2ghz = {
91 .channels = wfx_2ghz_chantable,
92 .n_channels = ARRAY_SIZE(wfx_2ghz_chantable),
93 .bitrates = wfx_rates,
94 .n_bitrates = ARRAY_SIZE(wfx_rates),
95 .ht_cap = {
96 /* Receive caps */
97 .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 |
98 IEEE80211_HT_CAP_MAX_AMSDU | (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT),
99 .ht_supported = 1,
100 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K,
101 .ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE,
102 .mcs = {
103 .rx_mask = { 0xFF }, /* MCS0 to MCS7 */
104 .rx_highest = cpu_to_le16(72),
105 .tx_params = IEEE80211_HT_MCS_TX_DEFINED,
106 },
107 },
108 };
109
110 static const struct ieee80211_iface_limit wdev_iface_limits[] = {
111 { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) },
112 { .max = 1, .types = BIT(NL80211_IFTYPE_AP) },
113 };
114
115 static const struct ieee80211_iface_combination wfx_iface_combinations[] = {
116 {
117 .num_different_channels = 2,
118 .max_interfaces = 2,
119 .limits = wdev_iface_limits,
120 .n_limits = ARRAY_SIZE(wdev_iface_limits),
121 }
122 };
123
124 static const struct ieee80211_ops wfx_ops = {
125 .start = wfx_start,
126 .stop = wfx_stop,
127 .add_interface = wfx_add_interface,
128 .remove_interface = wfx_remove_interface,
129 .config = wfx_config,
130 .tx = wfx_tx,
131 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
132 .join_ibss = wfx_join_ibss,
133 .leave_ibss = wfx_leave_ibss,
134 .conf_tx = wfx_conf_tx,
135 .hw_scan = wfx_hw_scan,
136 .cancel_hw_scan = wfx_cancel_hw_scan,
137 .start_ap = wfx_start_ap,
138 .stop_ap = wfx_stop_ap,
139 .sta_add = wfx_sta_add,
140 .sta_remove = wfx_sta_remove,
141 .set_tim = wfx_set_tim,
142 .set_key = wfx_set_key,
143 .set_rts_threshold = wfx_set_rts_threshold,
144 .set_default_unicast_key = wfx_set_default_unicast_key,
145 .bss_info_changed = wfx_bss_info_changed,
146 .configure_filter = wfx_configure_filter,
147 .ampdu_action = wfx_ampdu_action,
148 .flush = wfx_flush,
149 .add_chanctx = wfx_add_chanctx,
150 .remove_chanctx = wfx_remove_chanctx,
151 .change_chanctx = wfx_change_chanctx,
152 .assign_vif_chanctx = wfx_assign_vif_chanctx,
153 .unassign_vif_chanctx = wfx_unassign_vif_chanctx,
154 .remain_on_channel = wfx_remain_on_channel,
155 .cancel_remain_on_channel = wfx_cancel_remain_on_channel,
156 };
157
158 bool wfx_api_older_than(struct wfx_dev *wdev, int major, int minor)
159 {
160 if (wdev->hw_caps.api_version_major < major)
161 return true;
162 if (wdev->hw_caps.api_version_major > major)
163 return false;
164 if (wdev->hw_caps.api_version_minor < minor)
165 return true;
166 return false;
167 }
168
169 /* The device needs data about the antenna configuration. This information in provided by PDS
170 * (Platform Data Set, this is the wording used in WF200 documentation) files. For hardware
171 * integrators, the full process to create PDS files is described here:
172 * https://github.com/SiliconLabs/wfx-firmware/blob/master/PDS/README.md
173 *
174 * The PDS file is an array of Time-Length-Value structs.
175 */
176 int wfx_send_pds(struct wfx_dev *wdev, u8 *buf, size_t len)
177 {
178 int ret, chunk_type, chunk_len, chunk_num = 0;
179
180 if (*buf == '{') {
181 dev_err(wdev->dev, "PDS: malformed file (legacy format?)\n");
182 return -EINVAL;
183 }
184 while (len > 0) {
185 chunk_type = get_unaligned_le16(buf + 0);
186 chunk_len = get_unaligned_le16(buf + 2);
187 if (chunk_len < 4 || chunk_len > len) {
188 dev_err(wdev->dev, "PDS:%d: corrupted file\n", chunk_num);
189 return -EINVAL;
190 }
191 if (chunk_type != WFX_PDS_TLV_TYPE) {
192 dev_info(wdev->dev, "PDS:%d: skip unknown data\n", chunk_num);
193 goto next;
194 }
195 if (chunk_len > WFX_PDS_MAX_CHUNK_SIZE)
196 dev_warn(wdev->dev, "PDS:%d: unexpectedly large chunk\n", chunk_num);
197 if (buf[4] != '{' || buf[chunk_len - 1] != '}')
198 dev_warn(wdev->dev, "PDS:%d: unexpected content\n", chunk_num);
199
200 ret = wfx_hif_configuration(wdev, buf + 4, chunk_len - 4);
201 if (ret > 0) {
202 dev_err(wdev->dev, "PDS:%d: invalid data (unsupported options?)\n", chunk_num);
203 return -EINVAL;
204 }
205 if (ret == -ETIMEDOUT) {
206 dev_err(wdev->dev, "PDS:%d: chip didn't reply (corrupted file?)\n", chunk_num);
207 return ret;
208 }
209 if (ret) {
210 dev_err(wdev->dev, "PDS:%d: chip returned an unknown error\n", chunk_num);
211 return -EIO;
212 }
213 next:
214 chunk_num++;
215 len -= chunk_len;
216 buf += chunk_len;
217 }
218 return 0;
219 }
220
221 static int wfx_send_pdata_pds(struct wfx_dev *wdev)
222 {
223 int ret = 0;
224 const struct firmware *pds;
225 u8 *tmp_buf;
226
227 ret = request_firmware(&pds, wdev->pdata.file_pds, wdev->dev);
228 if (ret) {
229 dev_err(wdev->dev, "can't load antenna parameters (PDS file %s). The device may be unstable.\n",
230 wdev->pdata.file_pds);
231 return ret;
232 }
233 tmp_buf = kmemdup(pds->data, pds->size, GFP_KERNEL);
234 if (!tmp_buf) {
235 ret = -ENOMEM;
236 goto release_fw;
237 }
238 ret = wfx_send_pds(wdev, tmp_buf, pds->size);
239 kfree(tmp_buf);
240 release_fw:
241 release_firmware(pds);
242 return ret;
243 }
244
245 static void wfx_free_common(void *data)
246 {
247 struct wfx_dev *wdev = data;
248
249 mutex_destroy(&wdev->tx_power_loop_info_lock);
250 mutex_destroy(&wdev->rx_stats_lock);
251 mutex_destroy(&wdev->scan_lock);
252 mutex_destroy(&wdev->conf_mutex);
253 ieee80211_free_hw(wdev->hw);
254 }
255
256 struct wfx_dev *wfx_init_common(struct device *dev, const struct wfx_platform_data *pdata,
257 const struct wfx_hwbus_ops *hwbus_ops, void *hwbus_priv)
258 {
259 struct ieee80211_hw *hw;
260 struct wfx_dev *wdev;
261
262 hw = ieee80211_alloc_hw(sizeof(struct wfx_dev), &wfx_ops);
263 if (!hw)
264 return NULL;
265
266 SET_IEEE80211_DEV(hw, dev);
267
268 ieee80211_hw_set(hw, TX_AMPDU_SETUP_IN_HW);
269 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
270 ieee80211_hw_set(hw, CONNECTION_MONITOR);
271 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
272 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
273 ieee80211_hw_set(hw, SIGNAL_DBM);
274 ieee80211_hw_set(hw, SUPPORTS_PS);
275 ieee80211_hw_set(hw, MFP_CAPABLE);
276
277 hw->vif_data_size = sizeof(struct wfx_vif);
278 hw->sta_data_size = sizeof(struct wfx_sta_priv);
279 hw->queues = 4;
280 hw->max_rates = 8;
281 hw->max_rate_tries = 8;
282 hw->extra_tx_headroom = sizeof(struct wfx_hif_msg) + sizeof(struct wfx_hif_req_tx) +
283 4 /* alignment */ + 8 /* TKIP IV */;
284 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
285 BIT(NL80211_IFTYPE_ADHOC) |
286 BIT(NL80211_IFTYPE_AP);
287 hw->wiphy->probe_resp_offload = NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS |
288 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 |
289 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P |
290 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U;
291 hw->wiphy->features |= NL80211_FEATURE_AP_SCAN;
292 hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
293 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
294 hw->wiphy->max_remain_on_channel_duration = 5000;
295 hw->wiphy->max_ap_assoc_sta = HIF_LINK_ID_MAX;
296 hw->wiphy->max_scan_ssids = 2;
297 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
298 hw->wiphy->n_iface_combinations = ARRAY_SIZE(wfx_iface_combinations);
299 hw->wiphy->iface_combinations = wfx_iface_combinations;
300 /* FIXME: also copy wfx_rates and wfx_2ghz_chantable */
301 hw->wiphy->bands[NL80211_BAND_2GHZ] = devm_kmemdup(dev, &wfx_band_2ghz,
302 sizeof(wfx_band_2ghz), GFP_KERNEL);
303 if (!hw->wiphy->bands[NL80211_BAND_2GHZ])
304 goto err;
305
306 wdev = hw->priv;
307 wdev->hw = hw;
308 wdev->dev = dev;
309 wdev->hwbus_ops = hwbus_ops;
310 wdev->hwbus_priv = hwbus_priv;
311 memcpy(&wdev->pdata, pdata, sizeof(*pdata));
312 of_property_read_string(dev->of_node, "silabs,antenna-config-file", &wdev->pdata.file_pds);
313 wdev->pdata.gpio_wakeup = devm_gpiod_get_optional(dev, "wakeup", GPIOD_OUT_LOW);
314 if (IS_ERR(wdev->pdata.gpio_wakeup))
315 goto err;
316
317 if (wdev->pdata.gpio_wakeup)
318 gpiod_set_consumer_name(wdev->pdata.gpio_wakeup, "wfx wakeup");
319
320 mutex_init(&wdev->conf_mutex);
321 mutex_init(&wdev->scan_lock);
322 mutex_init(&wdev->rx_stats_lock);
323 mutex_init(&wdev->tx_power_loop_info_lock);
324 init_completion(&wdev->firmware_ready);
325 INIT_DELAYED_WORK(&wdev->cooling_timeout_work, wfx_cooling_timeout_work);
326 skb_queue_head_init(&wdev->tx_pending);
327 init_waitqueue_head(&wdev->tx_dequeue);
328 wfx_init_hif_cmd(&wdev->hif_cmd);
329
330 if (devm_add_action_or_reset(dev, wfx_free_common, wdev))
331 return NULL;
332
333 return wdev;
334
335 err:
336 ieee80211_free_hw(hw);
337 return NULL;
338 }
339
340 int wfx_probe(struct wfx_dev *wdev)
341 {
342 int i;
343 int err;
344 struct gpio_desc *gpio_saved;
345
346 /* During first part of boot, gpio_wakeup cannot yet been used. So prevent bh() to touch
347 * it.
348 */
349 gpio_saved = wdev->pdata.gpio_wakeup;
350 wdev->pdata.gpio_wakeup = NULL;
351 wdev->poll_irq = true;
352
353 wdev->bh_wq = alloc_workqueue("wfx_bh_wq", WQ_HIGHPRI, 0);
354 if (!wdev->bh_wq)
355 return -ENOMEM;
356
357 wfx_bh_register(wdev);
358
359 err = wfx_init_device(wdev);
360 if (err)
361 goto bh_unregister;
362
363 wfx_bh_poll_irq(wdev);
364 err = wait_for_completion_timeout(&wdev->firmware_ready, 1 * HZ);
365 if (err == 0) {
366 dev_err(wdev->dev, "timeout while waiting for startup indication\n");
367 err = -ETIMEDOUT;
368 goto bh_unregister;
369 }
370
371 /* FIXME: fill wiphy::hw_version */
372 dev_info(wdev->dev, "started firmware %d.%d.%d \"%s\" (API: %d.%d, keyset: %02X, caps: 0x%.8X)\n",
373 wdev->hw_caps.firmware_major, wdev->hw_caps.firmware_minor,
374 wdev->hw_caps.firmware_build, wdev->hw_caps.firmware_label,
375 wdev->hw_caps.api_version_major, wdev->hw_caps.api_version_minor,
376 wdev->keyset, wdev->hw_caps.link_mode);
377 snprintf(wdev->hw->wiphy->fw_version,
378 sizeof(wdev->hw->wiphy->fw_version),
379 "%d.%d.%d",
380 wdev->hw_caps.firmware_major,
381 wdev->hw_caps.firmware_minor,
382 wdev->hw_caps.firmware_build);
383
384 if (wfx_api_older_than(wdev, 1, 0)) {
385 dev_err(wdev->dev, "unsupported firmware API version (expect 1 while firmware returns %d)\n",
386 wdev->hw_caps.api_version_major);
387 err = -EOPNOTSUPP;
388 goto bh_unregister;
389 }
390
391 if (wdev->hw_caps.link_mode == SEC_LINK_ENFORCED) {
392 dev_err(wdev->dev, "chip require secure_link, but can't negotiate it\n");
393 goto bh_unregister;
394 }
395
396 if (wdev->hw_caps.region_sel_mode) {
397 wdev->hw->wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS;
398 wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[11].flags |=
399 IEEE80211_CHAN_NO_IR;
400 wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[12].flags |=
401 IEEE80211_CHAN_NO_IR;
402 wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[13].flags |=
403 IEEE80211_CHAN_DISABLED;
404 }
405
406 dev_dbg(wdev->dev, "sending configuration file %s\n", wdev->pdata.file_pds);
407 err = wfx_send_pdata_pds(wdev);
408 if (err < 0 && err != -ENOENT)
409 goto bh_unregister;
410
411 wdev->poll_irq = false;
412 err = wdev->hwbus_ops->irq_subscribe(wdev->hwbus_priv);
413 if (err)
414 goto bh_unregister;
415
416 err = wfx_hif_use_multi_tx_conf(wdev, true);
417 if (err)
418 dev_err(wdev->dev, "misconfigured IRQ?\n");
419
420 wdev->pdata.gpio_wakeup = gpio_saved;
421 if (wdev->pdata.gpio_wakeup) {
422 dev_dbg(wdev->dev, "enable 'quiescent' power mode with wakeup GPIO and PDS file %s\n",
423 wdev->pdata.file_pds);
424 gpiod_set_value_cansleep(wdev->pdata.gpio_wakeup, 1);
425 wfx_control_reg_write(wdev, 0);
426 wfx_hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_QUIESCENT);
427 } else {
428 wfx_hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_DOZE);
429 }
430
431 for (i = 0; i < ARRAY_SIZE(wdev->addresses); i++) {
432 eth_zero_addr(wdev->addresses[i].addr);
433 err = of_get_mac_address(wdev->dev->of_node, wdev->addresses[i].addr);
434 if (!err)
435 wdev->addresses[i].addr[ETH_ALEN - 1] += i;
436 else
437 ether_addr_copy(wdev->addresses[i].addr, wdev->hw_caps.mac_addr[i]);
438 if (!is_valid_ether_addr(wdev->addresses[i].addr)) {
439 dev_warn(wdev->dev, "using random MAC address\n");
440 eth_random_addr(wdev->addresses[i].addr);
441 }
442 dev_info(wdev->dev, "MAC address %d: %pM\n", i, wdev->addresses[i].addr);
443 }
444 wdev->hw->wiphy->n_addresses = ARRAY_SIZE(wdev->addresses);
445 wdev->hw->wiphy->addresses = wdev->addresses;
446
447 if (!wfx_api_older_than(wdev, 3, 8))
448 wdev->hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
449
450 err = ieee80211_register_hw(wdev->hw);
451 if (err)
452 goto irq_unsubscribe;
453
454 err = wfx_debug_init(wdev);
455 if (err)
456 goto ieee80211_unregister;
457
458 return 0;
459
460 ieee80211_unregister:
461 ieee80211_unregister_hw(wdev->hw);
462 irq_unsubscribe:
463 wdev->hwbus_ops->irq_unsubscribe(wdev->hwbus_priv);
464 bh_unregister:
465 wfx_bh_unregister(wdev);
466 destroy_workqueue(wdev->bh_wq);
467 return err;
468 }
469
470 void wfx_release(struct wfx_dev *wdev)
471 {
472 ieee80211_unregister_hw(wdev->hw);
473 wfx_hif_shutdown(wdev);
474 wdev->hwbus_ops->irq_unsubscribe(wdev->hwbus_priv);
475 wfx_bh_unregister(wdev);
476 destroy_workqueue(wdev->bh_wq);
477 }
478
479 static int __init wfx_core_init(void)
480 {
481 int ret = 0;
482
483 if (IS_ENABLED(CONFIG_SPI)) {
484 ret = spi_register_driver(&wfx_spi_driver);
485 if (ret)
486 goto out;
487 }
488 if (IS_ENABLED(CONFIG_MMC)) {
489 ret = sdio_register_driver(&wfx_sdio_driver);
490 if (ret)
491 goto unregister_spi;
492 }
493
494 return 0;
495
496 unregister_spi:
497 if (IS_ENABLED(CONFIG_SPI))
498 spi_unregister_driver(&wfx_spi_driver);
499 out:
500 return ret;
501 }
502 module_init(wfx_core_init);
503
504 static void __exit wfx_core_exit(void)
505 {
506 if (IS_ENABLED(CONFIG_MMC))
507 sdio_unregister_driver(&wfx_sdio_driver);
508 if (IS_ENABLED(CONFIG_SPI))
509 spi_unregister_driver(&wfx_spi_driver);
510 }
511 module_exit(wfx_core_exit);
Kernel DRM miscellaneous fixes and cross-tree changes