2 * Copyright (c) 2012 Qualcomm Atheros, Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <linux/moduleparam.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
24 static bool no_fw_recovery;
25 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
26 MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");
29 * Due to a hardware issue,
30 * one has to read/write to/from NIC in 32-bit chunks;
31 * regular memcpy_fromio and siblings will
32 * not work on 64-bit platform - it uses 64-bit transactions
34 * Force 32-bit transactions to enable NIC on 64-bit platforms
36 * To avoid byte swap on big endian host, __raw_{read|write}l
37 * should be used - {read|write}l would swap bytes to provide
38 * little endian on PCI value in host endianness.
40 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
44 const volatile u32 __iomem *s = src;
46 /* size_t is unsigned, if (count%4 != 0) it will wrap */
47 for (count += 4; count > 4; count -= 4)
48 *d++ = __raw_readl(s++);
51 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
54 volatile u32 __iomem *d = dst;
57 for (count += 4; count > 4; count -= 4)
58 __raw_writel(*s++, d++);
61 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
64 struct wil_sta_info *sta = &wil->sta[cid];
66 sta->data_port_open = false;
67 if (sta->status != wil_sta_unused) {
68 wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
69 sta->status = wil_sta_unused;
72 for (i = 0; i < WIL_STA_TID_NUM; i++) {
73 struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
74 sta->tid_rx[i] = NULL;
75 wil_tid_ampdu_rx_free(wil, r);
77 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
78 if (wil->vring2cid_tid[i][0] == cid)
79 wil_vring_fini_tx(wil, i);
81 memset(&sta->stats, 0, sizeof(sta->stats));
84 static void _wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
87 struct net_device *ndev = wil_to_ndev(wil);
88 struct wireless_dev *wdev = wil->wdev;
92 cid = wil_find_cid(wil, bssid);
93 wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
95 wil_dbg_misc(wil, "%s(all)\n", __func__);
98 if (cid >= 0) /* disconnect 1 peer */
99 wil_disconnect_cid(wil, cid);
100 else /* disconnect all */
101 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
102 wil_disconnect_cid(wil, cid);
105 switch (wdev->iftype) {
106 case NL80211_IFTYPE_STATION:
107 case NL80211_IFTYPE_P2P_CLIENT:
109 if (test_bit(wil_status_fwconnected, &wil->status)) {
110 clear_bit(wil_status_fwconnected, &wil->status);
111 cfg80211_disconnected(ndev,
112 WLAN_STATUS_UNSPECIFIED_FAILURE,
113 NULL, 0, GFP_KERNEL);
114 } else if (test_bit(wil_status_fwconnecting, &wil->status)) {
115 cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
116 WLAN_STATUS_UNSPECIFIED_FAILURE,
119 clear_bit(wil_status_fwconnecting, &wil->status);
122 /* AP-like interface and monitor:
123 * never scan, always connected
126 cfg80211_del_sta(ndev, bssid, GFP_KERNEL);
131 static void wil_disconnect_worker(struct work_struct *work)
133 struct wil6210_priv *wil = container_of(work,
134 struct wil6210_priv, disconnect_worker);
136 _wil6210_disconnect(wil, NULL);
139 static void wil_connect_timer_fn(ulong x)
141 struct wil6210_priv *wil = (void *)x;
143 wil_dbg_misc(wil, "Connect timeout\n");
145 /* reschedule to thread context - disconnect won't
146 * run from atomic context
148 schedule_work(&wil->disconnect_worker);
151 static void wil_fw_error_worker(struct work_struct *work)
153 struct wil6210_priv *wil = container_of(work,
154 struct wil6210_priv, fw_error_worker);
155 struct wireless_dev *wdev = wil->wdev;
157 wil_dbg_misc(wil, "fw error worker\n");
162 switch (wdev->iftype) {
163 case NL80211_IFTYPE_STATION:
164 case NL80211_IFTYPE_P2P_CLIENT:
165 case NL80211_IFTYPE_MONITOR:
166 wil_info(wil, "fw error recovery started...\n");
169 /* need to re-allocate Rx ring after reset */
172 case NL80211_IFTYPE_AP:
173 case NL80211_IFTYPE_P2P_GO:
174 /* recovery in these modes is done by upper layers */
181 static int wil_find_free_vring(struct wil6210_priv *wil)
184 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
185 if (!wil->vring_tx[i].va)
191 static void wil_connect_worker(struct work_struct *work)
194 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
196 int cid = wil->pending_connect_cid;
197 int ringid = wil_find_free_vring(wil);
200 wil_err(wil, "No connection pending\n");
204 wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
206 rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
207 wil->pending_connect_cid = -1;
209 wil->sta[cid].status = wil_sta_connected;
212 wil->sta[cid].status = wil_sta_unused;
216 int wil_priv_init(struct wil6210_priv *wil)
218 wil_dbg_misc(wil, "%s()\n", __func__);
220 memset(wil->sta, 0, sizeof(wil->sta));
222 mutex_init(&wil->mutex);
223 mutex_init(&wil->wmi_mutex);
225 init_completion(&wil->wmi_ready);
227 wil->pending_connect_cid = -1;
228 setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
230 INIT_WORK(&wil->connect_worker, wil_connect_worker);
231 INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
232 INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
233 INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
235 INIT_LIST_HEAD(&wil->pending_wmi_ev);
236 spin_lock_init(&wil->wmi_ev_lock);
238 wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
242 wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
243 if (!wil->wmi_wq_conn) {
244 destroy_workqueue(wil->wmi_wq);
251 void wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
253 del_timer_sync(&wil->connect_timer);
254 _wil6210_disconnect(wil, bssid);
257 void wil_priv_deinit(struct wil6210_priv *wil)
259 cancel_work_sync(&wil->disconnect_worker);
260 cancel_work_sync(&wil->fw_error_worker);
261 wil6210_disconnect(wil, NULL);
262 wmi_event_flush(wil);
263 destroy_workqueue(wil->wmi_wq_conn);
264 destroy_workqueue(wil->wmi_wq);
267 static void wil_target_reset(struct wil6210_priv *wil)
273 wil_dbg_misc(wil, "Resetting...\n");
276 #define R(a) ioread32(wil->csr + HOSTADDR(a))
278 #define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
279 /* register set = read, OR, write */
280 #define S(a, v) W(a, R(a) | v)
281 /* register clear = read, AND with inverted, write */
282 #define C(a, v) W(a, R(a) & ~v)
284 wil->hw_version = R(RGF_USER_FW_REV_ID);
285 rev_id = wil->hw_version & 0xff;
286 /* hpal_perst_from_pad_src_n_mask */
287 S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
288 /* car_perst_rst_src_n_mask */
289 S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
291 W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
292 W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
294 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
295 W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
296 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
297 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
299 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
300 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
301 W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
302 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
304 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
306 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
308 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
309 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
311 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
313 /* wait until device ready. Use baud rate */
316 baud_rate = R(RGF_USER_SERIAL_BAUD_RATE);
318 wil_err(wil, "Reset not completed\n");
321 } while (baud_rate != 0x15e);
324 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
326 C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
328 wil_dbg_misc(wil, "Reset completed in %d ms\n", delay);
336 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
338 le32_to_cpus(&r->base);
339 le16_to_cpus(&r->entry_size);
340 le16_to_cpus(&r->size);
341 le32_to_cpus(&r->tail);
342 le32_to_cpus(&r->head);
345 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
347 ulong to = msecs_to_jiffies(1000);
348 ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
350 wil_err(wil, "Firmware not ready\n");
353 wil_dbg_misc(wil, "FW ready after %d ms\n",
354 jiffies_to_msecs(to-left));
360 * We reset all the structures, and we reset the UMAC.
361 * After calling this routine, you're expected to reload
364 int wil_reset(struct wil6210_priv *wil)
368 wil->status = 0; /* prevent NAPI from being scheduled */
369 if (test_bit(wil_status_napi_en, &wil->status)) {
370 napi_synchronize(&wil->napi_rx);
371 napi_synchronize(&wil->napi_tx);
374 if (wil->scan_request) {
375 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
377 cfg80211_scan_done(wil->scan_request, true);
378 wil->scan_request = NULL;
381 cancel_work_sync(&wil->disconnect_worker);
382 wil6210_disconnect(wil, NULL);
384 wil6210_disable_irq(wil);
386 wmi_event_flush(wil);
388 flush_workqueue(wil->wmi_wq_conn);
389 flush_workqueue(wil->wmi_wq);
391 /* TODO: put MAC in reset */
392 wil_target_reset(wil);
396 /* init after reset */
397 wil->pending_connect_cid = -1;
398 reinit_completion(&wil->wmi_ready);
400 /* TODO: release MAC reset */
401 wil6210_enable_irq(wil);
403 /* we just started MAC, wait for FW ready */
404 rc = wil_wait_for_fw_ready(wil);
409 void wil_fw_error_recovery(struct wil6210_priv *wil)
411 wil_dbg_misc(wil, "starting fw error recovery\n");
412 schedule_work(&wil->fw_error_worker);
415 void wil_link_on(struct wil6210_priv *wil)
417 struct net_device *ndev = wil_to_ndev(wil);
419 wil_dbg_misc(wil, "%s()\n", __func__);
421 netif_carrier_on(ndev);
422 netif_tx_wake_all_queues(ndev);
425 void wil_link_off(struct wil6210_priv *wil)
427 struct net_device *ndev = wil_to_ndev(wil);
429 wil_dbg_misc(wil, "%s()\n", __func__);
431 netif_tx_stop_all_queues(ndev);
432 netif_carrier_off(ndev);
435 static int __wil_up(struct wil6210_priv *wil)
437 struct net_device *ndev = wil_to_ndev(wil);
438 struct wireless_dev *wdev = wil->wdev;
445 /* Rx VRING. After MAC and beacon */
446 rc = wil_rx_init(wil);
450 switch (wdev->iftype) {
451 case NL80211_IFTYPE_STATION:
452 wil_dbg_misc(wil, "type: STATION\n");
453 ndev->type = ARPHRD_ETHER;
455 case NL80211_IFTYPE_AP:
456 wil_dbg_misc(wil, "type: AP\n");
457 ndev->type = ARPHRD_ETHER;
459 case NL80211_IFTYPE_P2P_CLIENT:
460 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
461 ndev->type = ARPHRD_ETHER;
463 case NL80211_IFTYPE_P2P_GO:
464 wil_dbg_misc(wil, "type: P2P_GO\n");
465 ndev->type = ARPHRD_ETHER;
467 case NL80211_IFTYPE_MONITOR:
468 wil_dbg_misc(wil, "type: Monitor\n");
469 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
470 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
476 /* MAC address - pre-requisite for other commands */
477 wmi_set_mac_address(wil, ndev->dev_addr);
480 napi_enable(&wil->napi_rx);
481 napi_enable(&wil->napi_tx);
482 set_bit(wil_status_napi_en, &wil->status);
487 int wil_up(struct wil6210_priv *wil)
491 mutex_lock(&wil->mutex);
493 mutex_unlock(&wil->mutex);
498 static int __wil_down(struct wil6210_priv *wil)
500 clear_bit(wil_status_napi_en, &wil->status);
501 napi_disable(&wil->napi_rx);
502 napi_disable(&wil->napi_tx);
504 if (wil->scan_request) {
505 cfg80211_scan_done(wil->scan_request, true);
506 wil->scan_request = NULL;
509 wil6210_disconnect(wil, NULL);
515 int wil_down(struct wil6210_priv *wil)
519 mutex_lock(&wil->mutex);
520 rc = __wil_down(wil);
521 mutex_unlock(&wil->mutex);
526 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
531 for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
532 if ((wil->sta[i].status != wil_sta_unused) &&
533 ether_addr_equal(wil->sta[i].addr, mac)) {