summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/ath/wil6210/main.c
blob: 95fcd361322b06149ff0f7b95aa70ba08f6da181 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/*
 * Copyright (c) 2012 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/sched.h>
#include <linux/ieee80211.h>
#include <linux/wireless.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/if_arp.h>

#include "wil6210.h"

/*
 * Due to a hardware issue,
 * one has to read/write to/from NIC in 32-bit chunks;
 * regular memcpy_fromio and siblings will
 * not work on 64-bit platform - it uses 64-bit transactions
 *
 * Force 32-bit transactions to enable NIC on 64-bit platforms
 *
 * To avoid byte swap on big endian host, __raw_{read|write}l
 * should be used - {read|write}l would swap bytes to provide
 * little endian on PCI value in host endianness.
 */
void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
			  size_t count)
{
	u32 *d = dst;
	const volatile u32 __iomem *s = src;

	/* size_t is unsigned, if (count%4 != 0) it will wrap */
	for (count += 4; count > 4; count -= 4)
		*d++ = __raw_readl(s++);
}

void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
			size_t count)
{
	volatile u32 __iomem *d = dst;
	const u32 *s = src;

	for (count += 4; count > 4; count -= 4)
		__raw_writel(*s++, d++);
}

static void _wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
{
	uint i;
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;

	wil_dbg(wil, "%s()\n", __func__);

	wil_link_off(wil);
	clear_bit(wil_status_fwconnected, &wil->status);

	switch (wdev->sme_state) {
	case CFG80211_SME_CONNECTED:
		cfg80211_disconnected(ndev, WLAN_STATUS_UNSPECIFIED_FAILURE,
				      NULL, 0, GFP_KERNEL);
		break;
	case CFG80211_SME_CONNECTING:
		cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
					WLAN_STATUS_UNSPECIFIED_FAILURE,
					GFP_KERNEL);
		break;
	default:
		;
	}

	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++)
		wil_vring_fini_tx(wil, i);
}

static void wil_disconnect_worker(struct work_struct *work)
{
	struct wil6210_priv *wil = container_of(work,
			struct wil6210_priv, disconnect_worker);

	_wil6210_disconnect(wil, NULL);
}

static void wil_connect_timer_fn(ulong x)
{
	struct wil6210_priv *wil = (void *)x;

	wil_dbg(wil, "Connect timeout\n");

	/* reschedule to thread context - disconnect won't
	 * run from atomic context
	 */
	schedule_work(&wil->disconnect_worker);
}

int wil_priv_init(struct wil6210_priv *wil)
{
	wil_dbg(wil, "%s()\n", __func__);

	mutex_init(&wil->mutex);
	mutex_init(&wil->wmi_mutex);

	init_completion(&wil->wmi_ready);

	wil->pending_connect_cid = -1;
	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);

	INIT_WORK(&wil->wmi_connect_worker, wmi_connect_worker);
	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);

	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	spin_lock_init(&wil->wmi_ev_lock);

	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
	if (!wil->wmi_wq)
		return -EAGAIN;

	wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
	if (!wil->wmi_wq_conn) {
		destroy_workqueue(wil->wmi_wq);
		return -EAGAIN;
	}

	/* make shadow copy of registers that should not change on run time */
	wil_memcpy_fromio_32(&wil->mbox_ctl, wil->csr + HOST_MBOX,
			     sizeof(struct wil6210_mbox_ctl));
	wil_mbox_ring_le2cpus(&wil->mbox_ctl.rx);
	wil_mbox_ring_le2cpus(&wil->mbox_ctl.tx);

	return 0;
}

void wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
{
	del_timer_sync(&wil->connect_timer);
	_wil6210_disconnect(wil, bssid);
}

void wil_priv_deinit(struct wil6210_priv *wil)
{
	cancel_work_sync(&wil->disconnect_worker);
	wil6210_disconnect(wil, NULL);
	wmi_event_flush(wil);
	destroy_workqueue(wil->wmi_wq_conn);
	destroy_workqueue(wil->wmi_wq);
}

static void wil_target_reset(struct wil6210_priv *wil)
{
	wil_dbg(wil, "Resetting...\n");

	/* register write */
#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
	/* register set = read, OR, write */
#define S(a, v) iowrite32(ioread32(wil->csr + HOSTADDR(a)) | v, \
		wil->csr + HOSTADDR(a))

	/* hpal_perst_from_pad_src_n_mask */
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
	/* car_perst_rst_src_n_mask */
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));

	W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */
	W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */

	msleep(100);

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);

	msleep(100);

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);

	msleep(2000);

	W(RGF_USER_USER_CPU_0, BIT(0)); /* user_cpu_man_de_rst */

	msleep(2000);

	wil_dbg(wil, "Reset completed\n");

#undef W
#undef S
}

void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
{
	le32_to_cpus(&r->base);
	le16_to_cpus(&r->entry_size);
	le16_to_cpus(&r->size);
	le32_to_cpus(&r->tail);
	le32_to_cpus(&r->head);
}

static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
{
	ulong to = msecs_to_jiffies(1000);
	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
	if (0 == left) {
		wil_err(wil, "Firmware not ready\n");
		return -ETIME;
	} else {
		wil_dbg(wil, "FW ready after %d ms\n",
			jiffies_to_msecs(to-left));
	}
	return 0;
}

/*
 * We reset all the structures, and we reset the UMAC.
 * After calling this routine, you're expected to reload
 * the firmware.
 */
int wil_reset(struct wil6210_priv *wil)
{
	int rc;

	cancel_work_sync(&wil->disconnect_worker);
	wil6210_disconnect(wil, NULL);

	wmi_event_flush(wil);

	flush_workqueue(wil->wmi_wq);
	flush_workqueue(wil->wmi_wq_conn);

	wil6210_disable_irq(wil);
	wil->status = 0;

	/* TODO: put MAC in reset */
	wil_target_reset(wil);

	/* init after reset */
	wil->pending_connect_cid = -1;
	INIT_COMPLETION(wil->wmi_ready);

	/* make shadow copy of registers that should not change on run time */
	wil_memcpy_fromio_32(&wil->mbox_ctl, wil->csr + HOST_MBOX,
			     sizeof(struct wil6210_mbox_ctl));
	wil_mbox_ring_le2cpus(&wil->mbox_ctl.rx);
	wil_mbox_ring_le2cpus(&wil->mbox_ctl.tx);

	/* TODO: release MAC reset */
	wil6210_enable_irq(wil);

	/* we just started MAC, wait for FW ready */
	rc = wil_wait_for_fw_ready(wil);

	return rc;
}


void wil_link_on(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);

	wil_dbg(wil, "%s()\n", __func__);

	netif_carrier_on(ndev);
	netif_tx_wake_all_queues(ndev);
}

void wil_link_off(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);

	wil_dbg(wil, "%s()\n", __func__);

	netif_tx_stop_all_queues(ndev);
	netif_carrier_off(ndev);
}

static int __wil_up(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;
	struct ieee80211_channel *channel = wdev->preset_chandef.chan;
	int rc;
	int bi;
	u16 wmi_nettype = wil_iftype_nl2wmi(wdev->iftype);

	rc = wil_reset(wil);
	if (rc)
		return rc;

	/* FIXME Firmware works now in PBSS mode(ToDS=0, FromDS=0) */
	wmi_nettype = wil_iftype_nl2wmi(NL80211_IFTYPE_ADHOC);
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
		wil_dbg(wil, "type: STATION\n");
		bi = 0;
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_AP:
		wil_dbg(wil, "type: AP\n");
		bi = 100;
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_CLIENT:
		wil_dbg(wil, "type: P2P_CLIENT\n");
		bi = 0;
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_GO:
		wil_dbg(wil, "type: P2P_GO\n");
		bi = 100;
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_MONITOR:
		wil_dbg(wil, "type: Monitor\n");
		bi = 0;
		ndev->type = ARPHRD_IEEE80211_RADIOTAP;
		/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
		break;
	default:
		return -EOPNOTSUPP;
	}

	/* Apply profile in the following order: */
	/* SSID and channel for the AP */
	switch (wdev->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_P2P_GO:
		if (wdev->ssid_len == 0) {
			wil_err(wil, "SSID not set\n");
			return -EINVAL;
		}
		wmi_set_ssid(wil, wdev->ssid_len, wdev->ssid);
		if (channel)
			wmi_set_channel(wil, channel->hw_value);
		break;
	default:
		;
	}

	/* MAC address - pre-requisite for other commands */
	wmi_set_mac_address(wil, ndev->dev_addr);

	/* Set up beaconing if required. */
	rc = wmi_set_bcon(wil, bi, wmi_nettype);
	if (rc)
		return rc;

	/* Rx VRING. After MAC and beacon */
	wil_rx_init(wil);

	return 0;
}

int wil_up(struct wil6210_priv *wil)
{
	int rc;

	mutex_lock(&wil->mutex);
	rc = __wil_up(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}

static int __wil_down(struct wil6210_priv *wil)
{
	if (wil->scan_request) {
		cfg80211_scan_done(wil->scan_request, true);
		wil->scan_request = NULL;
	}

	wil6210_disconnect(wil, NULL);
	wil_rx_fini(wil);

	return 0;
}

int wil_down(struct wil6210_priv *wil)
{
	int rc;

	mutex_lock(&wil->mutex);
	rc = __wil_down(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}