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 */ 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 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 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 */ 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 ieee80211_tx_info *info; 125 struct sk_buff *skb = NULL; 126 u8 payload_offset; 127 struct ieee80211_vif *vif; 128 struct ieee80211_hdr *wh; 129 130 if (WARN(!pkt_len, "%s: Dummy pkt received", __func__)) 131 return NULL; 132 133 if (pkt_len > (RSI_RCV_BUFFER_LEN * 4)) { 134 rsi_dbg(ERR_ZONE, "%s: Pkt size > max rx buf size %d\n", 135 __func__, pkt_len); 136 pkt_len = RSI_RCV_BUFFER_LEN * 4; 137 } 138 139 pkt_len -= extended_desc; 140 skb = dev_alloc_skb(pkt_len + FRAME_DESC_SZ); 141 if (skb == NULL) 142 return NULL; 143 144 payload_offset = (extended_desc + FRAME_DESC_SZ); 145 skb_put(skb, pkt_len); 146 memcpy((skb->data), (buffer + payload_offset), skb->len); 147 wh = (struct ieee80211_hdr *)skb->data; 148 vif = rsi_get_vif(common->priv, wh->addr1); 149 150 info = IEEE80211_SKB_CB(skb); 151 return skb; 152 } 153 154 /** 155 * rsi_read_pkt() - This function reads frames from the card. 156 * @common: Pointer to the driver private structure. 157 * @rcv_pkt_len: Received pkt length. In case of USB it is 0. 158 * 159 * Return: 0 on success, -1 on failure. 160 */ 161 int rsi_read_pkt(struct rsi_common *common, u8 *rx_pkt, s32 rcv_pkt_len) 162 { 163 u8 *frame_desc = NULL, extended_desc = 0; 164 u32 index, length = 0, queueno = 0; 165 u16 actual_length = 0, offset; 166 struct sk_buff *skb = NULL; 167 #ifdef CONFIG_RSI_COEX 168 u8 bt_pkt_type; 169 #endif 170 171 index = 0; 172 do { 173 frame_desc = &rx_pkt[index]; 174 actual_length = *(u16 *)&frame_desc[0]; 175 offset = *(u16 *)&frame_desc[2]; 176 177 queueno = rsi_get_queueno(frame_desc, offset); 178 length = rsi_get_length(frame_desc, offset); 179 180 /* Extended descriptor is valid for WLAN queues only */ 181 if (queueno == RSI_WIFI_DATA_Q || queueno == RSI_WIFI_MGMT_Q) 182 extended_desc = rsi_get_extended_desc(frame_desc, 183 offset); 184 185 switch (queueno) { 186 case RSI_COEX_Q: 187 #ifdef CONFIG_RSI_COEX 188 if (common->coex_mode > 1) 189 rsi_coex_recv_pkt(common, frame_desc + offset); 190 else 191 #endif 192 rsi_mgmt_pkt_recv(common, 193 (frame_desc + offset)); 194 break; 195 196 case RSI_WIFI_DATA_Q: 197 skb = rsi_prepare_skb(common, 198 (frame_desc + offset), 199 length, 200 extended_desc); 201 if (skb == NULL) 202 goto fail; 203 204 rsi_indicate_pkt_to_os(common, skb); 205 break; 206 207 case RSI_WIFI_MGMT_Q: 208 rsi_mgmt_pkt_recv(common, (frame_desc + offset)); 209 break; 210 211 #ifdef CONFIG_RSI_COEX 212 case RSI_BT_MGMT_Q: 213 case RSI_BT_DATA_Q: 214 #define BT_RX_PKT_TYPE_OFST 14 215 #define BT_CARD_READY_IND 0x89 216 bt_pkt_type = frame_desc[offset + BT_RX_PKT_TYPE_OFST]; 217 if (bt_pkt_type == BT_CARD_READY_IND) { 218 rsi_dbg(INFO_ZONE, "BT Card ready recvd\n"); 219 if (rsi_bt_ops.attach(common, &g_proto_ops)) 220 rsi_dbg(ERR_ZONE, 221 "Failed to attach BT module\n"); 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 */ 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 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 } 277 278 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 285 286 /** 287 * rsi_91x_init() - This function initializes os interface operations. 288 * @void: Void. 289 * 290 * Return: Pointer to the adapter structure on success, NULL on failure . 291 */ 292 struct rsi_hw *rsi_91x_init(u16 oper_mode) 293 { 294 struct rsi_hw *adapter = NULL; 295 struct rsi_common *common = NULL; 296 u8 ii = 0; 297 298 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); 299 if (!adapter) 300 return NULL; 301 302 adapter->priv = kzalloc(sizeof(*common), GFP_KERNEL); 303 if (adapter->priv == NULL) { 304 rsi_dbg(ERR_ZONE, "%s: Failed in allocation of memory\n", 305 __func__); 306 kfree(adapter); 307 return NULL; 308 } else { 309 common = adapter->priv; 310 common->priv = adapter; 311 } 312 313 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++) 314 skb_queue_head_init(&common->tx_queue[ii]); 315 316 rsi_init_event(&common->tx_thread.event); 317 mutex_init(&common->mutex); 318 mutex_init(&common->tx_lock); 319 mutex_init(&common->rx_lock); 320 mutex_init(&common->tx_bus_mutex); 321 322 if (rsi_create_kthread(common, 323 &common->tx_thread, 324 rsi_tx_scheduler_thread, 325 "Tx-Thread")) { 326 rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__); 327 goto err; 328 } 329 330 rsi_default_ps_params(adapter); 331 init_bgscan_params(common); 332 spin_lock_init(&adapter->ps_lock); 333 timer_setup(&common->roc_timer, rsi_roc_timeout, 0); 334 init_completion(&common->wlan_init_completion); 335 adapter->device_model = RSI_DEV_9113; 336 common->oper_mode = oper_mode; 337 338 /* Determine coex mode */ 339 switch (common->oper_mode) { 340 case DEV_OPMODE_STA_BT_DUAL: 341 case DEV_OPMODE_STA_BT: 342 case DEV_OPMODE_STA_BT_LE: 343 case DEV_OPMODE_BT_ALONE: 344 case DEV_OPMODE_BT_LE_ALONE: 345 case DEV_OPMODE_BT_DUAL: 346 common->coex_mode = 2; 347 break; 348 case DEV_OPMODE_AP_BT_DUAL: 349 case DEV_OPMODE_AP_BT: 350 common->coex_mode = 4; 351 break; 352 case DEV_OPMODE_WIFI_ALONE: 353 common->coex_mode = 1; 354 break; 355 default: 356 common->oper_mode = 1; 357 common->coex_mode = 1; 358 } 359 rsi_dbg(INFO_ZONE, "%s: oper_mode = %d, coex_mode = %d\n", 360 __func__, common->oper_mode, common->coex_mode); 361 362 adapter->device_model = RSI_DEV_9113; 363 #ifdef CONFIG_RSI_COEX 364 if (common->coex_mode > 1) { 365 if (rsi_coex_attach(common)) { 366 rsi_dbg(ERR_ZONE, "Failed to init coex module\n"); 367 goto err; 368 } 369 } 370 #endif 371 372 common->init_done = true; 373 return adapter; 374 375 err: 376 kfree(common); 377 kfree(adapter); 378 return NULL; 379 } 380 EXPORT_SYMBOL_GPL(rsi_91x_init); 381 382 /** 383 * rsi_91x_deinit() - This function de-intializes os intf operations. 384 * @adapter: Pointer to the adapter structure. 385 * 386 * Return: None. 387 */ 388 void rsi_91x_deinit(struct rsi_hw *adapter) 389 { 390 struct rsi_common *common = adapter->priv; 391 u8 ii; 392 393 rsi_dbg(INFO_ZONE, "%s: Performing deinit os ops\n", __func__); 394 395 rsi_kill_thread(&common->tx_thread); 396 397 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++) 398 skb_queue_purge(&common->tx_queue[ii]); 399 400 #ifdef CONFIG_RSI_COEX 401 if (common->coex_mode > 1) { 402 if (common->bt_adapter) { 403 rsi_bt_ops.detach(common->bt_adapter); 404 common->bt_adapter = NULL; 405 } 406 rsi_coex_detach(common); 407 } 408 #endif 409 410 common->init_done = false; 411 412 kfree(common); 413 kfree(adapter->rsi_dev); 414 kfree(adapter); 415 } 416 EXPORT_SYMBOL_GPL(rsi_91x_deinit); 417 418 /** 419 * rsi_91x_hal_module_init() - This function is invoked when the module is 420 * loaded into the kernel. 421 * It registers the client driver. 422 * @void: Void. 423 * 424 * Return: 0 on success, -1 on failure. 425 */ 426 static int rsi_91x_hal_module_init(void) 427 { 428 rsi_dbg(INIT_ZONE, "%s: Module init called\n", __func__); 429 return 0; 430 } 431 432 /** 433 * rsi_91x_hal_module_exit() - This function is called at the time of 434 * removing/unloading the module. 435 * It unregisters the client driver. 436 * @void: Void. 437 * 438 * Return: None. 439 */ 440 static void rsi_91x_hal_module_exit(void) 441 { 442 rsi_dbg(INIT_ZONE, "%s: Module exit called\n", __func__); 443 } 444 445 module_init(rsi_91x_hal_module_init); 446 module_exit(rsi_91x_hal_module_exit); 447 MODULE_AUTHOR("Redpine Signals Inc"); 448 MODULE_DESCRIPTION("Station driver for RSI 91x devices"); 449 MODULE_SUPPORTED_DEVICE("RSI-91x"); 450 MODULE_VERSION("0.1"); 451 MODULE_LICENSE("Dual BSD/GPL"); 452