1 /*
2 * Copyright (c) 2012 Qualcomm Atheros, Inc.
3 *
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.
7 *
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.
15 */
16
17 #include <linux/moduleparam.h>
18 #include <linux/if_arp.h>
19
20 #include "wil6210.h"
21
22 /*
23 * Due to a hardware issue,
24 * one has to read/write to/from NIC in 32-bit chunks;
25 * regular memcpy_fromio and siblings will
26 * not work on 64-bit platform - it uses 64-bit transactions
27 *
28 * Force 32-bit transactions to enable NIC on 64-bit platforms
29 *
30 * To avoid byte swap on big endian host, __raw_{read|write}l
31 * should be used - {read|write}l would swap bytes to provide
32 * little endian on PCI value in host endianness.
33 */
wil_memcpy_fromio_32(void * dst,const volatile void __iomem * src,size_t count)34 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
35 size_t count)
36 {
37 u32 *d = dst;
38 const volatile u32 __iomem *s = src;
39
40 /* size_t is unsigned, if (count%4 != 0) it will wrap */
41 for (count += 4; count > 4; count -= 4)
42 *d++ = __raw_readl(s++);
43 }
44
wil_memcpy_toio_32(volatile void __iomem * dst,const void * src,size_t count)45 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
46 size_t count)
47 {
48 volatile u32 __iomem *d = dst;
49 const u32 *s = src;
50
51 for (count += 4; count > 4; count -= 4)
52 __raw_writel(*s++, d++);
53 }
54
_wil6210_disconnect(struct wil6210_priv * wil,void * bssid)55 static void _wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
56 {
57 uint i;
58 struct net_device *ndev = wil_to_ndev(wil);
59 struct wireless_dev *wdev = wil->wdev;
60
61 wil_dbg_misc(wil, "%s()\n", __func__);
62
63 wil_link_off(wil);
64 clear_bit(wil_status_fwconnected, &wil->status);
65
66 switch (wdev->sme_state) {
67 case CFG80211_SME_CONNECTED:
68 cfg80211_disconnected(ndev, WLAN_STATUS_UNSPECIFIED_FAILURE,
69 NULL, 0, GFP_KERNEL);
70 break;
71 case CFG80211_SME_CONNECTING:
72 cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
73 WLAN_STATUS_UNSPECIFIED_FAILURE,
74 GFP_KERNEL);
75 break;
76 default:
77 break;
78 }
79
80 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++)
81 wil_vring_fini_tx(wil, i);
82
83 clear_bit(wil_status_dontscan, &wil->status);
84 }
85
wil_disconnect_worker(struct work_struct * work)86 static void wil_disconnect_worker(struct work_struct *work)
87 {
88 struct wil6210_priv *wil = container_of(work,
89 struct wil6210_priv, disconnect_worker);
90
91 _wil6210_disconnect(wil, NULL);
92 }
93
wil_connect_timer_fn(ulong x)94 static void wil_connect_timer_fn(ulong x)
95 {
96 struct wil6210_priv *wil = (void *)x;
97
98 wil_dbg_misc(wil, "Connect timeout\n");
99
100 /* reschedule to thread context - disconnect won't
101 * run from atomic context
102 */
103 schedule_work(&wil->disconnect_worker);
104 }
105
wil_connect_worker(struct work_struct * work)106 static void wil_connect_worker(struct work_struct *work)
107 {
108 int rc;
109 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
110 connect_worker);
111 int cid = wil->pending_connect_cid;
112
113 if (cid < 0) {
114 wil_err(wil, "No connection pending\n");
115 return;
116 }
117
118 wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
119
120 rc = wil_vring_init_tx(wil, 0, WIL6210_TX_RING_SIZE, cid, 0);
121 wil->pending_connect_cid = -1;
122 if (rc == 0)
123 wil_link_on(wil);
124 }
125
wil_priv_init(struct wil6210_priv * wil)126 int wil_priv_init(struct wil6210_priv *wil)
127 {
128 wil_dbg_misc(wil, "%s()\n", __func__);
129
130 mutex_init(&wil->mutex);
131 mutex_init(&wil->wmi_mutex);
132
133 init_completion(&wil->wmi_ready);
134
135 wil->pending_connect_cid = -1;
136 setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
137
138 INIT_WORK(&wil->connect_worker, wil_connect_worker);
139 INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
140 INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
141
142 INIT_LIST_HEAD(&wil->pending_wmi_ev);
143 spin_lock_init(&wil->wmi_ev_lock);
144
145 wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
146 if (!wil->wmi_wq)
147 return -EAGAIN;
148
149 wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
150 if (!wil->wmi_wq_conn) {
151 destroy_workqueue(wil->wmi_wq);
152 return -EAGAIN;
153 }
154
155 return 0;
156 }
157
wil6210_disconnect(struct wil6210_priv * wil,void * bssid)158 void wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
159 {
160 del_timer_sync(&wil->connect_timer);
161 _wil6210_disconnect(wil, bssid);
162 }
163
wil_priv_deinit(struct wil6210_priv * wil)164 void wil_priv_deinit(struct wil6210_priv *wil)
165 {
166 cancel_work_sync(&wil->disconnect_worker);
167 wil6210_disconnect(wil, NULL);
168 wmi_event_flush(wil);
169 destroy_workqueue(wil->wmi_wq_conn);
170 destroy_workqueue(wil->wmi_wq);
171 }
172
wil_target_reset(struct wil6210_priv * wil)173 static void wil_target_reset(struct wil6210_priv *wil)
174 {
175 wil_dbg_misc(wil, "Resetting...\n");
176
177 /* register write */
178 #define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
179 /* register set = read, OR, write */
180 #define S(a, v) iowrite32(ioread32(wil->csr + HOSTADDR(a)) | v, \
181 wil->csr + HOSTADDR(a))
182
183 /* hpal_perst_from_pad_src_n_mask */
184 S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
185 /* car_perst_rst_src_n_mask */
186 S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
187
188 W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
189 W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
190
191 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
192 W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
193 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
194 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
195
196 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
197 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
198 W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
199 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
200
201 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
202 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
203 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
204
205 wil_dbg_misc(wil, "Reset completed\n");
206
207 #undef W
208 #undef S
209 }
210
wil_mbox_ring_le2cpus(struct wil6210_mbox_ring * r)211 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
212 {
213 le32_to_cpus(&r->base);
214 le16_to_cpus(&r->entry_size);
215 le16_to_cpus(&r->size);
216 le32_to_cpus(&r->tail);
217 le32_to_cpus(&r->head);
218 }
219
wil_wait_for_fw_ready(struct wil6210_priv * wil)220 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
221 {
222 ulong to = msecs_to_jiffies(1000);
223 ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
224 if (0 == left) {
225 wil_err(wil, "Firmware not ready\n");
226 return -ETIME;
227 } else {
228 wil_dbg_misc(wil, "FW ready after %d ms\n",
229 jiffies_to_msecs(to-left));
230 }
231 return 0;
232 }
233
234 /*
235 * We reset all the structures, and we reset the UMAC.
236 * After calling this routine, you're expected to reload
237 * the firmware.
238 */
wil_reset(struct wil6210_priv * wil)239 int wil_reset(struct wil6210_priv *wil)
240 {
241 int rc;
242
243 cancel_work_sync(&wil->disconnect_worker);
244 wil6210_disconnect(wil, NULL);
245
246 wil6210_disable_irq(wil);
247 wil->status = 0;
248
249 wmi_event_flush(wil);
250
251 flush_workqueue(wil->wmi_wq_conn);
252 flush_workqueue(wil->wmi_wq);
253
254 /* TODO: put MAC in reset */
255 wil_target_reset(wil);
256
257 /* init after reset */
258 wil->pending_connect_cid = -1;
259 INIT_COMPLETION(wil->wmi_ready);
260
261 /* TODO: release MAC reset */
262 wil6210_enable_irq(wil);
263
264 /* we just started MAC, wait for FW ready */
265 rc = wil_wait_for_fw_ready(wil);
266
267 return rc;
268 }
269
270
wil_link_on(struct wil6210_priv * wil)271 void wil_link_on(struct wil6210_priv *wil)
272 {
273 struct net_device *ndev = wil_to_ndev(wil);
274
275 wil_dbg_misc(wil, "%s()\n", __func__);
276
277 netif_carrier_on(ndev);
278 netif_tx_wake_all_queues(ndev);
279 }
280
wil_link_off(struct wil6210_priv * wil)281 void wil_link_off(struct wil6210_priv *wil)
282 {
283 struct net_device *ndev = wil_to_ndev(wil);
284
285 wil_dbg_misc(wil, "%s()\n", __func__);
286
287 netif_tx_stop_all_queues(ndev);
288 netif_carrier_off(ndev);
289 }
290
__wil_up(struct wil6210_priv * wil)291 static int __wil_up(struct wil6210_priv *wil)
292 {
293 struct net_device *ndev = wil_to_ndev(wil);
294 struct wireless_dev *wdev = wil->wdev;
295 struct ieee80211_channel *channel = wdev->preset_chandef.chan;
296 int rc;
297 int bi;
298 u16 wmi_nettype = wil_iftype_nl2wmi(wdev->iftype);
299
300 rc = wil_reset(wil);
301 if (rc)
302 return rc;
303
304 /* FIXME Firmware works now in PBSS mode(ToDS=0, FromDS=0) */
305 wmi_nettype = wil_iftype_nl2wmi(NL80211_IFTYPE_ADHOC);
306 switch (wdev->iftype) {
307 case NL80211_IFTYPE_STATION:
308 wil_dbg_misc(wil, "type: STATION\n");
309 bi = 0;
310 ndev->type = ARPHRD_ETHER;
311 break;
312 case NL80211_IFTYPE_AP:
313 wil_dbg_misc(wil, "type: AP\n");
314 bi = 100;
315 ndev->type = ARPHRD_ETHER;
316 break;
317 case NL80211_IFTYPE_P2P_CLIENT:
318 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
319 bi = 0;
320 ndev->type = ARPHRD_ETHER;
321 break;
322 case NL80211_IFTYPE_P2P_GO:
323 wil_dbg_misc(wil, "type: P2P_GO\n");
324 bi = 100;
325 ndev->type = ARPHRD_ETHER;
326 break;
327 case NL80211_IFTYPE_MONITOR:
328 wil_dbg_misc(wil, "type: Monitor\n");
329 bi = 0;
330 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
331 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
332 break;
333 default:
334 return -EOPNOTSUPP;
335 }
336
337 /* Apply profile in the following order: */
338 /* SSID and channel for the AP */
339 switch (wdev->iftype) {
340 case NL80211_IFTYPE_AP:
341 case NL80211_IFTYPE_P2P_GO:
342 if (wdev->ssid_len == 0) {
343 wil_err(wil, "SSID not set\n");
344 return -EINVAL;
345 }
346 rc = wmi_set_ssid(wil, wdev->ssid_len, wdev->ssid);
347 if (rc)
348 return rc;
349 break;
350 default:
351 break;
352 }
353
354 /* MAC address - pre-requisite for other commands */
355 wmi_set_mac_address(wil, ndev->dev_addr);
356
357 /* Set up beaconing if required. */
358 if (bi > 0) {
359 rc = wmi_pcp_start(wil, bi, wmi_nettype,
360 (channel ? channel->hw_value : 0));
361 if (rc)
362 return rc;
363 }
364
365 /* Rx VRING. After MAC and beacon */
366 wil_rx_init(wil);
367
368 return 0;
369 }
370
wil_up(struct wil6210_priv * wil)371 int wil_up(struct wil6210_priv *wil)
372 {
373 int rc;
374
375 mutex_lock(&wil->mutex);
376 rc = __wil_up(wil);
377 mutex_unlock(&wil->mutex);
378
379 return rc;
380 }
381
__wil_down(struct wil6210_priv * wil)382 static int __wil_down(struct wil6210_priv *wil)
383 {
384 if (wil->scan_request) {
385 cfg80211_scan_done(wil->scan_request, true);
386 wil->scan_request = NULL;
387 }
388
389 wil6210_disconnect(wil, NULL);
390 wil_rx_fini(wil);
391
392 return 0;
393 }
394
wil_down(struct wil6210_priv * wil)395 int wil_down(struct wil6210_priv *wil)
396 {
397 int rc;
398
399 mutex_lock(&wil->mutex);
400 rc = __wil_down(wil);
401 mutex_unlock(&wil->mutex);
402
403 return rc;
404 }
405