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