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 * @rx_pkt: Received pkt.
152 * @rcv_pkt_len: Received pkt length. In case of USB it is 0.
153 *
154 * Return: 0 on success, -1 on failure.
155 */
rsi_read_pkt(struct rsi_common * common,u8 * rx_pkt,s32 rcv_pkt_len)156 int rsi_read_pkt(struct rsi_common *common, u8 *rx_pkt, s32 rcv_pkt_len)
157 {
158 u8 *frame_desc = NULL, extended_desc = 0;
159 u32 index, length = 0, queueno = 0;
160 u16 actual_length = 0, offset;
161 struct sk_buff *skb = NULL;
162 #ifdef CONFIG_RSI_COEX
163 u8 bt_pkt_type;
164 #endif
165
166 index = 0;
167 do {
168 frame_desc = &rx_pkt[index];
169 actual_length = *(u16 *)&frame_desc[0];
170 offset = *(u16 *)&frame_desc[2];
171
172 queueno = rsi_get_queueno(frame_desc, offset);
173 length = rsi_get_length(frame_desc, offset);
174
175 /* Extended descriptor is valid for WLAN queues only */
176 if (queueno == RSI_WIFI_DATA_Q || queueno == RSI_WIFI_MGMT_Q)
177 extended_desc = rsi_get_extended_desc(frame_desc,
178 offset);
179
180 switch (queueno) {
181 case RSI_COEX_Q:
182 #ifdef CONFIG_RSI_COEX
183 if (common->coex_mode > 1)
184 rsi_coex_recv_pkt(common, frame_desc + offset);
185 else
186 #endif
187 rsi_mgmt_pkt_recv(common,
188 (frame_desc + offset));
189 break;
190
191 case RSI_WIFI_DATA_Q:
192 skb = rsi_prepare_skb(common,
193 (frame_desc + offset),
194 length,
195 extended_desc);
196 if (skb == NULL)
197 goto fail;
198
199 rsi_indicate_pkt_to_os(common, skb);
200 break;
201
202 case RSI_WIFI_MGMT_Q:
203 rsi_mgmt_pkt_recv(common, (frame_desc + offset));
204 break;
205
206 #ifdef CONFIG_RSI_COEX
207 case RSI_BT_MGMT_Q:
208 case RSI_BT_DATA_Q:
209 #define BT_RX_PKT_TYPE_OFST 14
210 #define BT_CARD_READY_IND 0x89
211 bt_pkt_type = frame_desc[offset + BT_RX_PKT_TYPE_OFST];
212 if (bt_pkt_type == BT_CARD_READY_IND) {
213 rsi_dbg(INFO_ZONE, "BT Card ready recvd\n");
214 if (rsi_bt_ops.attach(common, &g_proto_ops))
215 rsi_dbg(ERR_ZONE,
216 "Failed to attach BT module\n");
217 } else {
218 if (common->bt_adapter)
219 rsi_bt_ops.recv_pkt(common->bt_adapter,
220 frame_desc + offset);
221 }
222 break;
223 #endif
224
225 default:
226 rsi_dbg(ERR_ZONE, "%s: pkt from invalid queue: %d\n",
227 __func__, queueno);
228 goto fail;
229 }
230
231 index += actual_length;
232 rcv_pkt_len -= actual_length;
233 } while (rcv_pkt_len > 0);
234
235 return 0;
236 fail:
237 return -EINVAL;
238 }
239 EXPORT_SYMBOL_GPL(rsi_read_pkt);
240
241 /**
242 * rsi_tx_scheduler_thread() - This function is a kernel thread to send the
243 * packets to the device.
244 * @common: Pointer to the driver private structure.
245 *
246 * Return: None.
247 */
rsi_tx_scheduler_thread(struct rsi_common * common)248 static void rsi_tx_scheduler_thread(struct rsi_common *common)
249 {
250 struct rsi_hw *adapter = common->priv;
251 u32 timeout = EVENT_WAIT_FOREVER;
252
253 do {
254 if (adapter->determine_event_timeout)
255 timeout = adapter->determine_event_timeout(adapter);
256 rsi_wait_event(&common->tx_thread.event, timeout);
257 rsi_reset_event(&common->tx_thread.event);
258
259 if (common->init_done)
260 rsi_core_qos_processor(common);
261 } while (atomic_read(&common->tx_thread.thread_done) == 0);
262 complete_and_exit(&common->tx_thread.completion, 0);
263 }
264
265 #ifdef CONFIG_RSI_COEX
rsi_get_host_intf(void * priv)266 enum rsi_host_intf rsi_get_host_intf(void *priv)
267 {
268 struct rsi_common *common = (struct rsi_common *)priv;
269
270 return common->priv->rsi_host_intf;
271 }
272
rsi_set_bt_context(void * priv,void * bt_context)273 void rsi_set_bt_context(void *priv, void *bt_context)
274 {
275 struct rsi_common *common = (struct rsi_common *)priv;
276
277 common->bt_adapter = bt_context;
278 }
279 #endif
280
281 /**
282 * rsi_91x_init() - This function initializes os interface operations.
283 * @oper_mode: One of DEV_OPMODE_*.
284 *
285 * Return: Pointer to the adapter structure on success, NULL on failure .
286 */
rsi_91x_init(u16 oper_mode)287 struct rsi_hw *rsi_91x_init(u16 oper_mode)
288 {
289 struct rsi_hw *adapter = NULL;
290 struct rsi_common *common = NULL;
291 u8 ii = 0;
292
293 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
294 if (!adapter)
295 return NULL;
296
297 adapter->priv = kzalloc(sizeof(*common), GFP_KERNEL);
298 if (adapter->priv == NULL) {
299 rsi_dbg(ERR_ZONE, "%s: Failed in allocation of memory\n",
300 __func__);
301 kfree(adapter);
302 return NULL;
303 } else {
304 common = adapter->priv;
305 common->priv = adapter;
306 }
307
308 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
309 skb_queue_head_init(&common->tx_queue[ii]);
310
311 rsi_init_event(&common->tx_thread.event);
312 mutex_init(&common->mutex);
313 mutex_init(&common->tx_lock);
314 mutex_init(&common->rx_lock);
315 mutex_init(&common->tx_bus_mutex);
316
317 if (rsi_create_kthread(common,
318 &common->tx_thread,
319 rsi_tx_scheduler_thread,
320 "Tx-Thread")) {
321 rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__);
322 goto err;
323 }
324
325 rsi_default_ps_params(adapter);
326 init_bgscan_params(common);
327 spin_lock_init(&adapter->ps_lock);
328 timer_setup(&common->roc_timer, rsi_roc_timeout, 0);
329 init_completion(&common->wlan_init_completion);
330 adapter->device_model = RSI_DEV_9113;
331 common->oper_mode = oper_mode;
332
333 /* Determine coex mode */
334 switch (common->oper_mode) {
335 case DEV_OPMODE_STA_BT_DUAL:
336 case DEV_OPMODE_STA_BT:
337 case DEV_OPMODE_STA_BT_LE:
338 case DEV_OPMODE_BT_ALONE:
339 case DEV_OPMODE_BT_LE_ALONE:
340 case DEV_OPMODE_BT_DUAL:
341 common->coex_mode = 2;
342 break;
343 case DEV_OPMODE_AP_BT_DUAL:
344 case DEV_OPMODE_AP_BT:
345 common->coex_mode = 4;
346 break;
347 case DEV_OPMODE_WIFI_ALONE:
348 common->coex_mode = 1;
349 break;
350 default:
351 common->oper_mode = 1;
352 common->coex_mode = 1;
353 }
354 rsi_dbg(INFO_ZONE, "%s: oper_mode = %d, coex_mode = %d\n",
355 __func__, common->oper_mode, common->coex_mode);
356
357 adapter->device_model = RSI_DEV_9113;
358 #ifdef CONFIG_RSI_COEX
359 if (common->coex_mode > 1) {
360 if (rsi_coex_attach(common)) {
361 rsi_dbg(ERR_ZONE, "Failed to init coex module\n");
362 goto err;
363 }
364 }
365 #endif
366
367 common->init_done = true;
368 return adapter;
369
370 err:
371 kfree(common);
372 kfree(adapter);
373 return NULL;
374 }
375 EXPORT_SYMBOL_GPL(rsi_91x_init);
376
377 /**
378 * rsi_91x_deinit() - This function de-intializes os intf operations.
379 * @adapter: Pointer to the adapter structure.
380 *
381 * Return: None.
382 */
rsi_91x_deinit(struct rsi_hw * adapter)383 void rsi_91x_deinit(struct rsi_hw *adapter)
384 {
385 struct rsi_common *common = adapter->priv;
386 u8 ii;
387
388 rsi_dbg(INFO_ZONE, "%s: Performing deinit os ops\n", __func__);
389
390 rsi_kill_thread(&common->tx_thread);
391
392 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
393 skb_queue_purge(&common->tx_queue[ii]);
394
395 #ifdef CONFIG_RSI_COEX
396 if (common->coex_mode > 1) {
397 if (common->bt_adapter) {
398 rsi_bt_ops.detach(common->bt_adapter);
399 common->bt_adapter = NULL;
400 }
401 rsi_coex_detach(common);
402 }
403 #endif
404
405 common->init_done = false;
406
407 kfree(common);
408 kfree(adapter->rsi_dev);
409 kfree(adapter);
410 }
411 EXPORT_SYMBOL_GPL(rsi_91x_deinit);
412
413 /**
414 * rsi_91x_hal_module_init() - This function is invoked when the module is
415 * loaded into the kernel.
416 * It registers the client driver.
417 * @void: Void.
418 *
419 * Return: 0 on success, -1 on failure.
420 */
rsi_91x_hal_module_init(void)421 static int rsi_91x_hal_module_init(void)
422 {
423 rsi_dbg(INIT_ZONE, "%s: Module init called\n", __func__);
424 return 0;
425 }
426
427 /**
428 * rsi_91x_hal_module_exit() - This function is called at the time of
429 * removing/unloading the module.
430 * It unregisters the client driver.
431 * @void: Void.
432 *
433 * Return: None.
434 */
rsi_91x_hal_module_exit(void)435 static void rsi_91x_hal_module_exit(void)
436 {
437 rsi_dbg(INIT_ZONE, "%s: Module exit called\n", __func__);
438 }
439
440 module_init(rsi_91x_hal_module_init);
441 module_exit(rsi_91x_hal_module_exit);
442 MODULE_AUTHOR("Redpine Signals Inc");
443 MODULE_DESCRIPTION("Station driver for RSI 91x devices");
444 MODULE_SUPPORTED_DEVICE("RSI-91x");
445 MODULE_VERSION("0.1");
446 MODULE_LICENSE("Dual BSD/GPL");
447
