1 /*
2 * Copyright (c) 2014 Redpine Signals 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/module.h>
20 #include <linux/firmware.h>
21 #include <net/rsi_91x.h>
22 #include "rsi_mgmt.h"
23 #include "rsi_common.h"
24 #include "rsi_coex.h"
25 #include "rsi_hal.h"
26 #include "rsi_usb.h"
27
28 u32 rsi_zone_enabled = /* INFO_ZONE |
29 INIT_ZONE |
30 MGMT_TX_ZONE |
31 MGMT_RX_ZONE |
32 DATA_TX_ZONE |
33 DATA_RX_ZONE |
34 FSM_ZONE |
35 ISR_ZONE | */
36 ERR_ZONE |
37 0;
38 EXPORT_SYMBOL_GPL(rsi_zone_enabled);
39
40 #ifdef CONFIG_RSI_COEX
41 static struct rsi_proto_ops g_proto_ops = {
42 .coex_send_pkt = rsi_coex_send_pkt,
43 .get_host_intf = rsi_get_host_intf,
44 .set_bt_context = rsi_set_bt_context,
45 };
46 #endif
47
48 /**
49 * rsi_dbg() - This function outputs informational messages.
50 * @zone: Zone of interest for output message.
51 * @fmt: printf-style format for output message.
52 *
53 * Return: none
54 */
rsi_dbg(u32 zone,const char * fmt,...)55 void rsi_dbg(u32 zone, const char *fmt, ...)
56 {
57 struct va_format vaf;
58 va_list args;
59
60 va_start(args, fmt);
61
62 vaf.fmt = fmt;
63 vaf.va = &args;
64
65 if (zone & rsi_zone_enabled)
66 pr_info("%pV", &vaf);
67 va_end(args);
68 }
69 EXPORT_SYMBOL_GPL(rsi_dbg);
70
opmode_str(int oper_mode)71 static char *opmode_str(int oper_mode)
72 {
73 switch (oper_mode) {
74 case DEV_OPMODE_WIFI_ALONE:
75 return "Wi-Fi alone";
76 case DEV_OPMODE_BT_ALONE:
77 return "BT EDR alone";
78 case DEV_OPMODE_BT_LE_ALONE:
79 return "BT LE alone";
80 case DEV_OPMODE_BT_DUAL:
81 return "BT Dual";
82 case DEV_OPMODE_STA_BT:
83 return "Wi-Fi STA + BT EDR";
84 case DEV_OPMODE_STA_BT_LE:
85 return "Wi-Fi STA + BT LE";
86 case DEV_OPMODE_STA_BT_DUAL:
87 return "Wi-Fi STA + BT DUAL";
88 case DEV_OPMODE_AP_BT:
89 return "Wi-Fi AP + BT EDR";
90 case DEV_OPMODE_AP_BT_DUAL:
91 return "Wi-Fi AP + BT DUAL";
92 }
93
94 return "Unknown";
95 }
96
rsi_print_version(struct rsi_common * common)97 void rsi_print_version(struct rsi_common *common)
98 {
99 rsi_dbg(ERR_ZONE, "================================================\n");
100 rsi_dbg(ERR_ZONE, "================ RSI Version Info ==============\n");
101 rsi_dbg(ERR_ZONE, "================================================\n");
102 rsi_dbg(ERR_ZONE, "FW Version\t: %d.%d.%d\n",
103 common->lmac_ver.major, common->lmac_ver.minor,
104 common->lmac_ver.release_num);
105 rsi_dbg(ERR_ZONE, "Operating mode\t: %d [%s]",
106 common->oper_mode, opmode_str(common->oper_mode));
107 rsi_dbg(ERR_ZONE, "Firmware file\t: %s", common->priv->fw_file_name);
108 rsi_dbg(ERR_ZONE, "================================================\n");
109 }
110
111 /**
112 * rsi_prepare_skb() - This function prepares the skb.
113 * @common: Pointer to the driver private structure.
114 * @buffer: Pointer to the packet data.
115 * @pkt_len: Length of the packet.
116 * @extended_desc: Extended descriptor.
117 *
118 * Return: Successfully skb.
119 */
rsi_prepare_skb(struct rsi_common * common,u8 * buffer,u32 pkt_len,u8 extended_desc)120 static struct sk_buff *rsi_prepare_skb(struct rsi_common *common,
121 u8 *buffer,
122 u32 pkt_len,
123 u8 extended_desc)
124 {
125 struct sk_buff *skb = NULL;
126 u8 payload_offset;
127
128 if (WARN(!pkt_len, "%s: Dummy pkt received", __func__))
129 return NULL;
130
131 if (pkt_len > (RSI_RCV_BUFFER_LEN * 4)) {
132 rsi_dbg(ERR_ZONE, "%s: Pkt size > max rx buf size %d\n",
133 __func__, pkt_len);
134 pkt_len = RSI_RCV_BUFFER_LEN * 4;
135 }
136
137 pkt_len -= extended_desc;
138 skb = dev_alloc_skb(pkt_len + FRAME_DESC_SZ);
139 if (skb == NULL)
140 return NULL;
141
142 payload_offset = (extended_desc + FRAME_DESC_SZ);
143 skb_put(skb, pkt_len);
144 memcpy((skb->data), (buffer + payload_offset), skb->len);
145
146 return skb;
147 }
148
149 /**
150 * rsi_read_pkt() - This function reads frames from the card.
151 * @common: Pointer to the driver private structure.
152 * @rx_pkt: Received pkt.
153 * @rcv_pkt_len: Received pkt length. In case of USB it is 0.
154 *
155 * Return: 0 on success, -1 on failure.
156 */
rsi_read_pkt(struct rsi_common * common,u8 * rx_pkt,s32 rcv_pkt_len)157 int rsi_read_pkt(struct rsi_common *common, u8 *rx_pkt, s32 rcv_pkt_len)
158 {
159 u8 *frame_desc = NULL, extended_desc = 0;
160 u32 index, length = 0, queueno = 0;
161 u16 actual_length = 0, offset;
162 struct sk_buff *skb = NULL;
163 #ifdef CONFIG_RSI_COEX
164 u8 bt_pkt_type;
165 #endif
166
167 index = 0;
168 do {
169 frame_desc = &rx_pkt[index];
170 actual_length = *(u16 *)&frame_desc[0];
171 offset = *(u16 *)&frame_desc[2];
172 if (!rcv_pkt_len && offset >
173 RSI_MAX_RX_USB_PKT_SIZE - FRAME_DESC_SZ)
174 goto fail;
175
176 queueno = rsi_get_queueno(frame_desc, offset);
177 length = rsi_get_length(frame_desc, offset);
178
179 /* Extended descriptor is valid for WLAN queues only */
180 if (queueno == RSI_WIFI_DATA_Q || queueno == RSI_WIFI_MGMT_Q)
181 extended_desc = rsi_get_extended_desc(frame_desc,
182 offset);
183
184 switch (queueno) {
185 case RSI_COEX_Q:
186 #ifdef CONFIG_RSI_COEX
187 if (common->coex_mode > 1)
188 rsi_coex_recv_pkt(common, frame_desc + offset);
189 else
190 #endif
191 rsi_mgmt_pkt_recv(common,
192 (frame_desc + offset));
193 break;
194
195 case RSI_WIFI_DATA_Q:
196 skb = rsi_prepare_skb(common,
197 (frame_desc + offset),
198 length,
199 extended_desc);
200 if (skb == NULL)
201 goto fail;
202
203 rsi_indicate_pkt_to_os(common, skb);
204 break;
205
206 case RSI_WIFI_MGMT_Q:
207 rsi_mgmt_pkt_recv(common, (frame_desc + offset));
208 break;
209
210 #ifdef CONFIG_RSI_COEX
211 case RSI_BT_MGMT_Q:
212 case RSI_BT_DATA_Q:
213 #define BT_RX_PKT_TYPE_OFST 14
214 #define BT_CARD_READY_IND 0x89
215 bt_pkt_type = frame_desc[offset + BT_RX_PKT_TYPE_OFST];
216 if (bt_pkt_type == BT_CARD_READY_IND) {
217 rsi_dbg(INFO_ZONE, "BT Card ready recvd\n");
218 if (common->fsm_state == FSM_MAC_INIT_DONE)
219 rsi_attach_bt(common);
220 else
221 common->bt_defer_attach = true;
222 } else {
223 if (common->bt_adapter)
224 rsi_bt_ops.recv_pkt(common->bt_adapter,
225 frame_desc + offset);
226 }
227 break;
228 #endif
229
230 default:
231 rsi_dbg(ERR_ZONE, "%s: pkt from invalid queue: %d\n",
232 __func__, queueno);
233 goto fail;
234 }
235
236 index += actual_length;
237 rcv_pkt_len -= actual_length;
238 } while (rcv_pkt_len > 0);
239
240 return 0;
241 fail:
242 return -EINVAL;
243 }
244 EXPORT_SYMBOL_GPL(rsi_read_pkt);
245
246 /**
247 * rsi_tx_scheduler_thread() - This function is a kernel thread to send the
248 * packets to the device.
249 * @common: Pointer to the driver private structure.
250 *
251 * Return: None.
252 */
rsi_tx_scheduler_thread(struct rsi_common * common)253 static void rsi_tx_scheduler_thread(struct rsi_common *common)
254 {
255 struct rsi_hw *adapter = common->priv;
256 u32 timeout = EVENT_WAIT_FOREVER;
257
258 do {
259 if (adapter->determine_event_timeout)
260 timeout = adapter->determine_event_timeout(adapter);
261 rsi_wait_event(&common->tx_thread.event, timeout);
262 rsi_reset_event(&common->tx_thread.event);
263
264 if (common->init_done)
265 rsi_core_qos_processor(common);
266 } while (atomic_read(&common->tx_thread.thread_done) == 0);
267 complete_and_exit(&common->tx_thread.completion, 0);
268 }
269
270 #ifdef CONFIG_RSI_COEX
rsi_get_host_intf(void * priv)271 enum rsi_host_intf rsi_get_host_intf(void *priv)
272 {
273 struct rsi_common *common = (struct rsi_common *)priv;
274
275 return common->priv->rsi_host_intf;
276 }
277
rsi_set_bt_context(void * priv,void * bt_context)278 void rsi_set_bt_context(void *priv, void *bt_context)
279 {
280 struct rsi_common *common = (struct rsi_common *)priv;
281
282 common->bt_adapter = bt_context;
283 }
284 #endif
285
rsi_attach_bt(struct rsi_common * common)286 void rsi_attach_bt(struct rsi_common *common)
287 {
288 #ifdef CONFIG_RSI_COEX
289 if (rsi_bt_ops.attach(common, &g_proto_ops))
290 rsi_dbg(ERR_ZONE,
291 "Failed to attach BT module\n");
292 #endif
293 }
294
295 /**
296 * rsi_91x_init() - This function initializes os interface operations.
297 * @oper_mode: One of DEV_OPMODE_*.
298 *
299 * Return: Pointer to the adapter structure on success, NULL on failure .
300 */
rsi_91x_init(u16 oper_mode)301 struct rsi_hw *rsi_91x_init(u16 oper_mode)
302 {
303 struct rsi_hw *adapter = NULL;
304 struct rsi_common *common = NULL;
305 u8 ii = 0;
306
307 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
308 if (!adapter)
309 return NULL;
310
311 adapter->priv = kzalloc(sizeof(*common), GFP_KERNEL);
312 if (adapter->priv == NULL) {
313 rsi_dbg(ERR_ZONE, "%s: Failed in allocation of memory\n",
314 __func__);
315 kfree(adapter);
316 return NULL;
317 } else {
318 common = adapter->priv;
319 common->priv = adapter;
320 }
321
322 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
323 skb_queue_head_init(&common->tx_queue[ii]);
324
325 rsi_init_event(&common->tx_thread.event);
326 mutex_init(&common->mutex);
327 mutex_init(&common->tx_lock);
328 mutex_init(&common->rx_lock);
329 mutex_init(&common->tx_bus_mutex);
330
331 if (rsi_create_kthread(common,
332 &common->tx_thread,
333 rsi_tx_scheduler_thread,
334 "Tx-Thread")) {
335 rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__);
336 goto err;
337 }
338
339 rsi_default_ps_params(adapter);
340 init_bgscan_params(common);
341 spin_lock_init(&adapter->ps_lock);
342 timer_setup(&common->roc_timer, rsi_roc_timeout, 0);
343 init_completion(&common->wlan_init_completion);
344 adapter->device_model = RSI_DEV_9113;
345 common->oper_mode = oper_mode;
346
347 /* Determine coex mode */
348 switch (common->oper_mode) {
349 case DEV_OPMODE_STA_BT_DUAL:
350 case DEV_OPMODE_STA_BT:
351 case DEV_OPMODE_STA_BT_LE:
352 case DEV_OPMODE_BT_ALONE:
353 case DEV_OPMODE_BT_LE_ALONE:
354 case DEV_OPMODE_BT_DUAL:
355 common->coex_mode = 2;
356 break;
357 case DEV_OPMODE_AP_BT_DUAL:
358 case DEV_OPMODE_AP_BT:
359 common->coex_mode = 4;
360 break;
361 case DEV_OPMODE_WIFI_ALONE:
362 common->coex_mode = 1;
363 break;
364 default:
365 common->oper_mode = 1;
366 common->coex_mode = 1;
367 }
368 rsi_dbg(INFO_ZONE, "%s: oper_mode = %d, coex_mode = %d\n",
369 __func__, common->oper_mode, common->coex_mode);
370
371 adapter->device_model = RSI_DEV_9113;
372 #ifdef CONFIG_RSI_COEX
373 if (common->coex_mode > 1) {
374 if (rsi_coex_attach(common)) {
375 rsi_dbg(ERR_ZONE, "Failed to init coex module\n");
376 rsi_kill_thread(&common->tx_thread);
377 goto err;
378 }
379 }
380 #endif
381
382 common->init_done = true;
383 return adapter;
384
385 err:
386 kfree(common);
387 kfree(adapter);
388 return NULL;
389 }
390 EXPORT_SYMBOL_GPL(rsi_91x_init);
391
392 /**
393 * rsi_91x_deinit() - This function de-intializes os intf operations.
394 * @adapter: Pointer to the adapter structure.
395 *
396 * Return: None.
397 */
rsi_91x_deinit(struct rsi_hw * adapter)398 void rsi_91x_deinit(struct rsi_hw *adapter)
399 {
400 struct rsi_common *common = adapter->priv;
401 u8 ii;
402
403 rsi_dbg(INFO_ZONE, "%s: Performing deinit os ops\n", __func__);
404
405 rsi_kill_thread(&common->tx_thread);
406
407 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
408 skb_queue_purge(&common->tx_queue[ii]);
409
410 #ifdef CONFIG_RSI_COEX
411 if (common->coex_mode > 1) {
412 if (common->bt_adapter) {
413 rsi_bt_ops.detach(common->bt_adapter);
414 common->bt_adapter = NULL;
415 }
416 rsi_coex_detach(common);
417 }
418 #endif
419
420 common->init_done = false;
421
422 kfree(common);
423 kfree(adapter->rsi_dev);
424 kfree(adapter);
425 }
426 EXPORT_SYMBOL_GPL(rsi_91x_deinit);
427
428 /**
429 * rsi_91x_hal_module_init() - This function is invoked when the module is
430 * loaded into the kernel.
431 * It registers the client driver.
432 * @void: Void.
433 *
434 * Return: 0 on success, -1 on failure.
435 */
rsi_91x_hal_module_init(void)436 static int rsi_91x_hal_module_init(void)
437 {
438 rsi_dbg(INIT_ZONE, "%s: Module init called\n", __func__);
439 return 0;
440 }
441
442 /**
443 * rsi_91x_hal_module_exit() - This function is called at the time of
444 * removing/unloading the module.
445 * It unregisters the client driver.
446 * @void: Void.
447 *
448 * Return: None.
449 */
rsi_91x_hal_module_exit(void)450 static void rsi_91x_hal_module_exit(void)
451 {
452 rsi_dbg(INIT_ZONE, "%s: Module exit called\n", __func__);
453 }
454
455 module_init(rsi_91x_hal_module_init);
456 module_exit(rsi_91x_hal_module_exit);
457 MODULE_AUTHOR("Redpine Signals Inc");
458 MODULE_DESCRIPTION("Station driver for RSI 91x devices");
459 MODULE_SUPPORTED_DEVICE("RSI-91x");
460 MODULE_VERSION("0.1");
461 MODULE_LICENSE("Dual BSD/GPL");
462