summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/rsi/rsi_91x_main.c
blob: 5d1490fc32db41ad9da7ff00e1c72ae78be7244a (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
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
/*
 * Copyright (c) 2014 Redpine Signals 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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/firmware.h>
#include <net/rsi_91x.h>
#include "rsi_mgmt.h"
#include "rsi_common.h"
#include "rsi_coex.h"
#include "rsi_hal.h"
#include "rsi_usb.h"

u32 rsi_zone_enabled = /* INFO_ZONE |
			INIT_ZONE |
			MGMT_TX_ZONE |
			MGMT_RX_ZONE |
			DATA_TX_ZONE |
			DATA_RX_ZONE |
			FSM_ZONE |
			ISR_ZONE | */
			ERR_ZONE |
			0;
EXPORT_SYMBOL_GPL(rsi_zone_enabled);

#ifdef CONFIG_RSI_COEX
static struct rsi_proto_ops g_proto_ops = {
	.coex_send_pkt = rsi_coex_send_pkt,
	.get_host_intf = rsi_get_host_intf,
	.set_bt_context = rsi_set_bt_context,
};
#endif

/**
 * rsi_dbg() - This function outputs informational messages.
 * @zone: Zone of interest for output message.
 * @fmt: printf-style format for output message.
 *
 * Return: none
 */
void rsi_dbg(u32 zone, const char *fmt, ...)
{
	struct va_format vaf;
	va_list args;

	va_start(args, fmt);

	vaf.fmt = fmt;
	vaf.va = &args;

	if (zone & rsi_zone_enabled)
		pr_info("%pV", &vaf);
	va_end(args);
}
EXPORT_SYMBOL_GPL(rsi_dbg);

static char *opmode_str(int oper_mode)
{
	switch (oper_mode) {
	case DEV_OPMODE_WIFI_ALONE:
		return "Wi-Fi alone";
	case DEV_OPMODE_BT_ALONE:
		return "BT EDR alone";
	case DEV_OPMODE_BT_LE_ALONE:
		return "BT LE alone";
	case DEV_OPMODE_BT_DUAL:
		return "BT Dual";
	case DEV_OPMODE_STA_BT:
		return "Wi-Fi STA + BT EDR";
	case DEV_OPMODE_STA_BT_LE:
		return "Wi-Fi STA + BT LE";
	case DEV_OPMODE_STA_BT_DUAL:
		return "Wi-Fi STA + BT DUAL";
	case DEV_OPMODE_AP_BT:
		return "Wi-Fi AP + BT EDR";
	case DEV_OPMODE_AP_BT_DUAL:
		return "Wi-Fi AP + BT DUAL";
	}

	return "Unknown";
}

void rsi_print_version(struct rsi_common *common)
{
	rsi_dbg(ERR_ZONE, "================================================\n");
	rsi_dbg(ERR_ZONE, "================ RSI Version Info ==============\n");
	rsi_dbg(ERR_ZONE, "================================================\n");
	rsi_dbg(ERR_ZONE, "FW Version\t: %d.%d.%d\n",
		common->lmac_ver.major, common->lmac_ver.minor,
		common->lmac_ver.release_num);
	rsi_dbg(ERR_ZONE, "Operating mode\t: %d [%s]",
		common->oper_mode, opmode_str(common->oper_mode));
	rsi_dbg(ERR_ZONE, "Firmware file\t: %s", common->priv->fw_file_name);
	rsi_dbg(ERR_ZONE, "================================================\n");
}

/**
 * rsi_prepare_skb() - This function prepares the skb.
 * @common: Pointer to the driver private structure.
 * @buffer: Pointer to the packet data.
 * @pkt_len: Length of the packet.
 * @extended_desc: Extended descriptor.
 *
 * Return: Successfully skb.
 */
static struct sk_buff *rsi_prepare_skb(struct rsi_common *common,
				       u8 *buffer,
				       u32 pkt_len,
				       u8 extended_desc)
{
	struct sk_buff *skb = NULL;
	u8 payload_offset;

	if (WARN(!pkt_len, "%s: Dummy pkt received", __func__))
		return NULL;

	if (pkt_len > (RSI_RCV_BUFFER_LEN * 4)) {
		rsi_dbg(ERR_ZONE, "%s: Pkt size > max rx buf size %d\n",
			__func__, pkt_len);
		pkt_len = RSI_RCV_BUFFER_LEN * 4;
	}

	pkt_len -= extended_desc;
	skb = dev_alloc_skb(pkt_len + FRAME_DESC_SZ);
	if (skb == NULL)
		return NULL;

	payload_offset = (extended_desc + FRAME_DESC_SZ);
	skb_put(skb, pkt_len);
	memcpy((skb->data), (buffer + payload_offset), skb->len);

	return skb;
}

/**
 * rsi_read_pkt() - This function reads frames from the card.
 * @common: Pointer to the driver private structure.
 * @rx_pkt: Received pkt.
 * @rcv_pkt_len: Received pkt length. In case of USB it is 0.
 *
 * Return: 0 on success, -1 on failure.
 */
int rsi_read_pkt(struct rsi_common *common, u8 *rx_pkt, s32 rcv_pkt_len)
{
	u8 *frame_desc = NULL, extended_desc = 0;
	u32 index, length = 0, queueno = 0;
	u16 actual_length = 0, offset;
	struct sk_buff *skb = NULL;
#ifdef CONFIG_RSI_COEX
	u8 bt_pkt_type;
#endif

	index = 0;
	do {
		frame_desc = &rx_pkt[index];
		actual_length = *(u16 *)&frame_desc[0];
		offset = *(u16 *)&frame_desc[2];
		if (!rcv_pkt_len && offset >
			RSI_MAX_RX_USB_PKT_SIZE - FRAME_DESC_SZ)
			goto fail;

		queueno = rsi_get_queueno(frame_desc, offset);
		length = rsi_get_length(frame_desc, offset);

		/* Extended descriptor is valid for WLAN queues only */
		if (queueno == RSI_WIFI_DATA_Q || queueno == RSI_WIFI_MGMT_Q)
			extended_desc = rsi_get_extended_desc(frame_desc,
							      offset);

		switch (queueno) {
		case RSI_COEX_Q:
#ifdef CONFIG_RSI_COEX
			if (common->coex_mode > 1)
				rsi_coex_recv_pkt(common, frame_desc + offset);
			else
#endif
				rsi_mgmt_pkt_recv(common,
						  (frame_desc + offset));
			break;

		case RSI_WIFI_DATA_Q:
			skb = rsi_prepare_skb(common,
					      (frame_desc + offset),
					      length,
					      extended_desc);
			if (skb == NULL)
				goto fail;

			rsi_indicate_pkt_to_os(common, skb);
			break;

		case RSI_WIFI_MGMT_Q:
			rsi_mgmt_pkt_recv(common, (frame_desc + offset));
			break;

#ifdef CONFIG_RSI_COEX
		case RSI_BT_MGMT_Q:
		case RSI_BT_DATA_Q:
#define BT_RX_PKT_TYPE_OFST	14
#define BT_CARD_READY_IND	0x89
			bt_pkt_type = frame_desc[offset + BT_RX_PKT_TYPE_OFST];
			if (bt_pkt_type == BT_CARD_READY_IND) {
				rsi_dbg(INFO_ZONE, "BT Card ready recvd\n");
				if (common->fsm_state == FSM_MAC_INIT_DONE)
					rsi_attach_bt(common);
				else
					common->bt_defer_attach = true;
			} else {
				if (common->bt_adapter)
					rsi_bt_ops.recv_pkt(common->bt_adapter,
							frame_desc + offset);
			}
			break;
#endif

		default:
			rsi_dbg(ERR_ZONE, "%s: pkt from invalid queue: %d\n",
				__func__,   queueno);
			goto fail;
		}

		index  += actual_length;
		rcv_pkt_len -= actual_length;
	} while (rcv_pkt_len > 0);

	return 0;
fail:
	return -EINVAL;
}
EXPORT_SYMBOL_GPL(rsi_read_pkt);

/**
 * rsi_tx_scheduler_thread() - This function is a kernel thread to send the
 *			       packets to the device.
 * @common: Pointer to the driver private structure.
 *
 * Return: None.
 */
static void rsi_tx_scheduler_thread(struct rsi_common *common)
{
	struct rsi_hw *adapter = common->priv;
	u32 timeout = EVENT_WAIT_FOREVER;

	do {
		if (adapter->determine_event_timeout)
			timeout = adapter->determine_event_timeout(adapter);
		rsi_wait_event(&common->tx_thread.event, timeout);
		rsi_reset_event(&common->tx_thread.event);

		if (common->init_done)
			rsi_core_qos_processor(common);
	} while (atomic_read(&common->tx_thread.thread_done) == 0);
	complete_and_exit(&common->tx_thread.completion, 0);
}

#ifdef CONFIG_RSI_COEX
enum rsi_host_intf rsi_get_host_intf(void *priv)
{
	struct rsi_common *common = (struct rsi_common *)priv;

	return common->priv->rsi_host_intf;
}

void rsi_set_bt_context(void *priv, void *bt_context)
{
	struct rsi_common *common = (struct rsi_common *)priv;

	common->bt_adapter = bt_context;
}
#endif

void rsi_attach_bt(struct rsi_common *common)
{
#ifdef CONFIG_RSI_COEX
	if (rsi_bt_ops.attach(common, &g_proto_ops))
		rsi_dbg(ERR_ZONE,
			"Failed to attach BT module\n");
#endif
}

/**
 * rsi_91x_init() - This function initializes os interface operations.
 * @oper_mode: One of DEV_OPMODE_*.
 *
 * Return: Pointer to the adapter structure on success, NULL on failure .
 */
struct rsi_hw *rsi_91x_init(u16 oper_mode)
{
	struct rsi_hw *adapter = NULL;
	struct rsi_common *common = NULL;
	u8 ii = 0;

	adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
	if (!adapter)
		return NULL;

	adapter->priv = kzalloc(sizeof(*common), GFP_KERNEL);
	if (adapter->priv == NULL) {
		rsi_dbg(ERR_ZONE, "%s: Failed in allocation of memory\n",
			__func__);
		kfree(adapter);
		return NULL;
	} else {
		common = adapter->priv;
		common->priv = adapter;
	}

	for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
		skb_queue_head_init(&common->tx_queue[ii]);

	rsi_init_event(&common->tx_thread.event);
	mutex_init(&common->mutex);
	mutex_init(&common->tx_lock);
	mutex_init(&common->rx_lock);
	mutex_init(&common->tx_bus_mutex);

	if (rsi_create_kthread(common,
			       &common->tx_thread,
			       rsi_tx_scheduler_thread,
			       "Tx-Thread")) {
		rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__);
		goto err;
	}

	rsi_default_ps_params(adapter);
	init_bgscan_params(common);
	spin_lock_init(&adapter->ps_lock);
	timer_setup(&common->roc_timer, rsi_roc_timeout, 0);
	init_completion(&common->wlan_init_completion);
	adapter->device_model = RSI_DEV_9113;
	common->oper_mode = oper_mode;

	/* Determine coex mode */
	switch (common->oper_mode) {
	case DEV_OPMODE_STA_BT_DUAL:
	case DEV_OPMODE_STA_BT:
	case DEV_OPMODE_STA_BT_LE:
	case DEV_OPMODE_BT_ALONE:
	case DEV_OPMODE_BT_LE_ALONE:
	case DEV_OPMODE_BT_DUAL:
		common->coex_mode = 2;
		break;
	case DEV_OPMODE_AP_BT_DUAL:
	case DEV_OPMODE_AP_BT:
		common->coex_mode = 4;
		break;
	case DEV_OPMODE_WIFI_ALONE:
		common->coex_mode = 1;
		break;
	default:
		common->oper_mode = 1;
		common->coex_mode = 1;
	}
	rsi_dbg(INFO_ZONE, "%s: oper_mode = %d, coex_mode = %d\n",
		__func__, common->oper_mode, common->coex_mode);

	adapter->device_model = RSI_DEV_9113;
#ifdef CONFIG_RSI_COEX
	if (common->coex_mode > 1) {
		if (rsi_coex_attach(common)) {
			rsi_dbg(ERR_ZONE, "Failed to init coex module\n");
			rsi_kill_thread(&common->tx_thread);
			goto err;
		}
	}
#endif

	common->init_done = true;
	return adapter;

err:
	kfree(common);
	kfree(adapter);
	return NULL;
}
EXPORT_SYMBOL_GPL(rsi_91x_init);

/**
 * rsi_91x_deinit() - This function de-intializes os intf operations.
 * @adapter: Pointer to the adapter structure.
 *
 * Return: None.
 */
void rsi_91x_deinit(struct rsi_hw *adapter)
{
	struct rsi_common *common = adapter->priv;
	u8 ii;

	rsi_dbg(INFO_ZONE, "%s: Performing deinit os ops\n", __func__);

	rsi_kill_thread(&common->tx_thread);

	for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
		skb_queue_purge(&common->tx_queue[ii]);

#ifdef CONFIG_RSI_COEX
	if (common->coex_mode > 1) {
		if (common->bt_adapter) {
			rsi_bt_ops.detach(common->bt_adapter);
			common->bt_adapter = NULL;
		}
		rsi_coex_detach(common);
	}
#endif

	common->init_done = false;

	kfree(common);
	kfree(adapter->rsi_dev);
	kfree(adapter);
}
EXPORT_SYMBOL_GPL(rsi_91x_deinit);

/**
 * rsi_91x_hal_module_init() - This function is invoked when the module is
 *			       loaded into the kernel.
 *			       It registers the client driver.
 * @void: Void.
 *
 * Return: 0 on success, -1 on failure.
 */
static int rsi_91x_hal_module_init(void)
{
	rsi_dbg(INIT_ZONE, "%s: Module init called\n", __func__);
	return 0;
}

/**
 * rsi_91x_hal_module_exit() - This function is called at the time of
 *			       removing/unloading the module.
 *			       It unregisters the client driver.
 * @void: Void.
 *
 * Return: None.
 */
static void rsi_91x_hal_module_exit(void)
{
	rsi_dbg(INIT_ZONE, "%s: Module exit called\n", __func__);
}

module_init(rsi_91x_hal_module_init);
module_exit(rsi_91x_hal_module_exit);
MODULE_AUTHOR("Redpine Signals Inc");
MODULE_DESCRIPTION("Station driver for RSI 91x devices");
MODULE_VERSION("0.1");
MODULE_LICENSE("Dual BSD/GPL");