1 /* 2 * FM Driver for Connectivity chip of Texas Instruments. 3 * 4 * This sub-module of FM driver is common for FM RX and TX 5 * functionality. This module is responsible for: 6 * 1) Forming group of Channel-8 commands to perform particular 7 * functionality (eg., frequency set require more than 8 * one Channel-8 command to be sent to the chip). 9 * 2) Sending each Channel-8 command to the chip and reading 10 * response back over Shared Transport. 11 * 3) Managing TX and RX Queues and Tasklets. 12 * 4) Handling FM Interrupt packet and taking appropriate action. 13 * 5) Loading FM firmware to the chip (common, FM TX, and FM RX 14 * firmware files based on mode selection) 15 * 16 * Copyright (C) 2011 Texas Instruments 17 * Author: Raja Mani <raja_mani@ti.com> 18 * Author: Manjunatha Halli <manjunatha_halli@ti.com> 19 * 20 * This program is free software; you can redistribute it and/or modify 21 * it under the terms of the GNU General Public License version 2 as 22 * published by the Free Software Foundation. 23 * 24 * This program is distributed in the hope that it will be useful, 25 * but WITHOUT ANY WARRANTY; without even the implied warranty of 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 27 * GNU General Public License for more details. 28 * 29 * You should have received a copy of the GNU General Public License 30 * along with this program; if not, write to the Free Software 31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 32 * 33 */ 34 35 #include <linux/module.h> 36 #include <linux/firmware.h> 37 #include <linux/delay.h> 38 #include "fmdrv.h" 39 #include "fmdrv_v4l2.h" 40 #include "fmdrv_common.h" 41 #include <linux/ti_wilink_st.h> 42 #include "fmdrv_rx.h" 43 #include "fmdrv_tx.h" 44 45 /* Region info */ 46 static struct region_info region_configs[] = { 47 /* Europe/US */ 48 { 49 .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL, 50 .bot_freq = 87500, /* 87.5 MHz */ 51 .top_freq = 108000, /* 108 MHz */ 52 .fm_band = 0, 53 }, 54 /* Japan */ 55 { 56 .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL, 57 .bot_freq = 76000, /* 76 MHz */ 58 .top_freq = 90000, /* 90 MHz */ 59 .fm_band = 1, 60 }, 61 }; 62 63 /* Band selection */ 64 static u8 default_radio_region; /* Europe/US */ 65 module_param(default_radio_region, byte, 0); 66 MODULE_PARM_DESC(default_radio_region, "Region: 0=Europe/US, 1=Japan"); 67 68 /* RDS buffer blocks */ 69 static u32 default_rds_buf = 300; 70 module_param(default_rds_buf, uint, 0444); 71 MODULE_PARM_DESC(default_rds_buf, "RDS buffer entries"); 72 73 /* Radio Nr */ 74 static u32 radio_nr = -1; 75 module_param(radio_nr, int, 0444); 76 MODULE_PARM_DESC(radio_nr, "Radio Nr"); 77 78 /* FM irq handlers forward declaration */ 79 static void fm_irq_send_flag_getcmd(struct fmdev *); 80 static void fm_irq_handle_flag_getcmd_resp(struct fmdev *); 81 static void fm_irq_handle_hw_malfunction(struct fmdev *); 82 static void fm_irq_handle_rds_start(struct fmdev *); 83 static void fm_irq_send_rdsdata_getcmd(struct fmdev *); 84 static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *); 85 static void fm_irq_handle_rds_finish(struct fmdev *); 86 static void fm_irq_handle_tune_op_ended(struct fmdev *); 87 static void fm_irq_handle_power_enb(struct fmdev *); 88 static void fm_irq_handle_low_rssi_start(struct fmdev *); 89 static void fm_irq_afjump_set_pi(struct fmdev *); 90 static void fm_irq_handle_set_pi_resp(struct fmdev *); 91 static void fm_irq_afjump_set_pimask(struct fmdev *); 92 static void fm_irq_handle_set_pimask_resp(struct fmdev *); 93 static void fm_irq_afjump_setfreq(struct fmdev *); 94 static void fm_irq_handle_setfreq_resp(struct fmdev *); 95 static void fm_irq_afjump_enableint(struct fmdev *); 96 static void fm_irq_afjump_enableint_resp(struct fmdev *); 97 static void fm_irq_start_afjump(struct fmdev *); 98 static void fm_irq_handle_start_afjump_resp(struct fmdev *); 99 static void fm_irq_afjump_rd_freq(struct fmdev *); 100 static void fm_irq_afjump_rd_freq_resp(struct fmdev *); 101 static void fm_irq_handle_low_rssi_finish(struct fmdev *); 102 static void fm_irq_send_intmsk_cmd(struct fmdev *); 103 static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *); 104 105 /* 106 * When FM common module receives interrupt packet, following handlers 107 * will be executed one after another to service the interrupt(s) 108 */ 109 enum fmc_irq_handler_index { 110 FM_SEND_FLAG_GETCMD_IDX, 111 FM_HANDLE_FLAG_GETCMD_RESP_IDX, 112 113 /* HW malfunction irq handler */ 114 FM_HW_MAL_FUNC_IDX, 115 116 /* RDS threshold reached irq handler */ 117 FM_RDS_START_IDX, 118 FM_RDS_SEND_RDS_GETCMD_IDX, 119 FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX, 120 FM_RDS_FINISH_IDX, 121 122 /* Tune operation ended irq handler */ 123 FM_HW_TUNE_OP_ENDED_IDX, 124 125 /* TX power enable irq handler */ 126 FM_HW_POWER_ENB_IDX, 127 128 /* Low RSSI irq handler */ 129 FM_LOW_RSSI_START_IDX, 130 FM_AF_JUMP_SETPI_IDX, 131 FM_AF_JUMP_HANDLE_SETPI_RESP_IDX, 132 FM_AF_JUMP_SETPI_MASK_IDX, 133 FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX, 134 FM_AF_JUMP_SET_AF_FREQ_IDX, 135 FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX, 136 FM_AF_JUMP_ENABLE_INT_IDX, 137 FM_AF_JUMP_ENABLE_INT_RESP_IDX, 138 FM_AF_JUMP_START_AFJUMP_IDX, 139 FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX, 140 FM_AF_JUMP_RD_FREQ_IDX, 141 FM_AF_JUMP_RD_FREQ_RESP_IDX, 142 FM_LOW_RSSI_FINISH_IDX, 143 144 /* Interrupt process post action */ 145 FM_SEND_INTMSK_CMD_IDX, 146 FM_HANDLE_INTMSK_CMD_RESP_IDX, 147 }; 148 149 /* FM interrupt handler table */ 150 static int_handler_prototype int_handler_table[] = { 151 fm_irq_send_flag_getcmd, 152 fm_irq_handle_flag_getcmd_resp, 153 fm_irq_handle_hw_malfunction, 154 fm_irq_handle_rds_start, /* RDS threshold reached irq handler */ 155 fm_irq_send_rdsdata_getcmd, 156 fm_irq_handle_rdsdata_getcmd_resp, 157 fm_irq_handle_rds_finish, 158 fm_irq_handle_tune_op_ended, 159 fm_irq_handle_power_enb, /* TX power enable irq handler */ 160 fm_irq_handle_low_rssi_start, 161 fm_irq_afjump_set_pi, 162 fm_irq_handle_set_pi_resp, 163 fm_irq_afjump_set_pimask, 164 fm_irq_handle_set_pimask_resp, 165 fm_irq_afjump_setfreq, 166 fm_irq_handle_setfreq_resp, 167 fm_irq_afjump_enableint, 168 fm_irq_afjump_enableint_resp, 169 fm_irq_start_afjump, 170 fm_irq_handle_start_afjump_resp, 171 fm_irq_afjump_rd_freq, 172 fm_irq_afjump_rd_freq_resp, 173 fm_irq_handle_low_rssi_finish, 174 fm_irq_send_intmsk_cmd, /* Interrupt process post action */ 175 fm_irq_handle_intmsk_cmd_resp 176 }; 177 178 static long (*g_st_write) (struct sk_buff *skb); 179 static struct completion wait_for_fmdrv_reg_comp; 180 181 static inline void fm_irq_call(struct fmdev *fmdev) 182 { 183 fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev); 184 } 185 186 /* Continue next function in interrupt handler table */ 187 static inline void fm_irq_call_stage(struct fmdev *fmdev, u8 stage) 188 { 189 fmdev->irq_info.stage = stage; 190 fm_irq_call(fmdev); 191 } 192 193 static inline void fm_irq_timeout_stage(struct fmdev *fmdev, u8 stage) 194 { 195 fmdev->irq_info.stage = stage; 196 mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT); 197 } 198 199 #ifdef FM_DUMP_TXRX_PKT 200 /* To dump outgoing FM Channel-8 packets */ 201 inline void dump_tx_skb_data(struct sk_buff *skb) 202 { 203 int len, len_org; 204 u8 index; 205 struct fm_cmd_msg_hdr *cmd_hdr; 206 207 cmd_hdr = (struct fm_cmd_msg_hdr *)skb->data; 208 printk(KERN_INFO "<<%shdr:%02x len:%02x opcode:%02x type:%s dlen:%02x", 209 fm_cb(skb)->completion ? " " : "*", cmd_hdr->hdr, 210 cmd_hdr->len, cmd_hdr->op, 211 cmd_hdr->rd_wr ? "RD" : "WR", cmd_hdr->dlen); 212 213 len_org = skb->len - FM_CMD_MSG_HDR_SIZE; 214 if (len_org > 0) { 215 printk("\n data(%d): ", cmd_hdr->dlen); 216 len = min(len_org, 14); 217 for (index = 0; index < len; index++) 218 printk("%x ", 219 skb->data[FM_CMD_MSG_HDR_SIZE + index]); 220 printk("%s", (len_org > 14) ? ".." : ""); 221 } 222 printk("\n"); 223 } 224 225 /* To dump incoming FM Channel-8 packets */ 226 inline void dump_rx_skb_data(struct sk_buff *skb) 227 { 228 int len, len_org; 229 u8 index; 230 struct fm_event_msg_hdr *evt_hdr; 231 232 evt_hdr = (struct fm_event_msg_hdr *)skb->data; 233 printk(KERN_INFO ">> hdr:%02x len:%02x sts:%02x numhci:%02x " 234 "opcode:%02x type:%s dlen:%02x", evt_hdr->hdr, evt_hdr->len, 235 evt_hdr->status, evt_hdr->num_fm_hci_cmds, evt_hdr->op, 236 (evt_hdr->rd_wr) ? "RD" : "WR", evt_hdr->dlen); 237 238 len_org = skb->len - FM_EVT_MSG_HDR_SIZE; 239 if (len_org > 0) { 240 printk("\n data(%d): ", evt_hdr->dlen); 241 len = min(len_org, 14); 242 for (index = 0; index < len; index++) 243 printk("%x ", 244 skb->data[FM_EVT_MSG_HDR_SIZE + index]); 245 printk("%s", (len_org > 14) ? ".." : ""); 246 } 247 printk("\n"); 248 } 249 #endif 250 251 void fmc_update_region_info(struct fmdev *fmdev, u8 region_to_set) 252 { 253 fmdev->rx.region = region_configs[region_to_set]; 254 } 255 256 /* 257 * FM common sub-module will schedule this tasklet whenever it receives 258 * FM packet from ST driver. 259 */ 260 static void recv_tasklet(unsigned long arg) 261 { 262 struct fmdev *fmdev; 263 struct fm_irq *irq_info; 264 struct fm_event_msg_hdr *evt_hdr; 265 struct sk_buff *skb; 266 u8 num_fm_hci_cmds; 267 unsigned long flags; 268 269 fmdev = (struct fmdev *)arg; 270 irq_info = &fmdev->irq_info; 271 /* Process all packets in the RX queue */ 272 while ((skb = skb_dequeue(&fmdev->rx_q))) { 273 if (skb->len < sizeof(struct fm_event_msg_hdr)) { 274 fmerr("skb(%p) has only %d bytes, " 275 "at least need %zu bytes to decode\n", skb, 276 skb->len, sizeof(struct fm_event_msg_hdr)); 277 kfree_skb(skb); 278 continue; 279 } 280 281 evt_hdr = (void *)skb->data; 282 num_fm_hci_cmds = evt_hdr->num_fm_hci_cmds; 283 284 /* FM interrupt packet? */ 285 if (evt_hdr->op == FM_INTERRUPT) { 286 /* FM interrupt handler started already? */ 287 if (!test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) { 288 set_bit(FM_INTTASK_RUNNING, &fmdev->flag); 289 if (irq_info->stage != 0) { 290 fmerr("Inval stage resetting to zero\n"); 291 irq_info->stage = 0; 292 } 293 294 /* 295 * Execute first function in interrupt handler 296 * table. 297 */ 298 irq_info->handlers[irq_info->stage](fmdev); 299 } else { 300 set_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag); 301 } 302 kfree_skb(skb); 303 } 304 /* Anyone waiting for this with completion handler? */ 305 else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp != NULL) { 306 307 spin_lock_irqsave(&fmdev->resp_skb_lock, flags); 308 fmdev->resp_skb = skb; 309 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags); 310 complete(fmdev->resp_comp); 311 312 fmdev->resp_comp = NULL; 313 atomic_set(&fmdev->tx_cnt, 1); 314 } 315 /* Is this for interrupt handler? */ 316 else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp == NULL) { 317 if (fmdev->resp_skb != NULL) 318 fmerr("Response SKB ptr not NULL\n"); 319 320 spin_lock_irqsave(&fmdev->resp_skb_lock, flags); 321 fmdev->resp_skb = skb; 322 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags); 323 324 /* Execute interrupt handler where state index points */ 325 irq_info->handlers[irq_info->stage](fmdev); 326 327 kfree_skb(skb); 328 atomic_set(&fmdev->tx_cnt, 1); 329 } else { 330 fmerr("Nobody claimed SKB(%p),purging\n", skb); 331 } 332 333 /* 334 * Check flow control field. If Num_FM_HCI_Commands field is 335 * not zero, schedule FM TX tasklet. 336 */ 337 if (num_fm_hci_cmds && atomic_read(&fmdev->tx_cnt)) 338 if (!skb_queue_empty(&fmdev->tx_q)) 339 tasklet_schedule(&fmdev->tx_task); 340 } 341 } 342 343 /* FM send tasklet: is scheduled when FM packet has to be sent to chip */ 344 static void send_tasklet(unsigned long arg) 345 { 346 struct fmdev *fmdev; 347 struct sk_buff *skb; 348 int len; 349 350 fmdev = (struct fmdev *)arg; 351 352 if (!atomic_read(&fmdev->tx_cnt)) 353 return; 354 355 /* Check, is there any timeout happened to last transmitted packet */ 356 if ((jiffies - fmdev->last_tx_jiffies) > FM_DRV_TX_TIMEOUT) { 357 fmerr("TX timeout occurred\n"); 358 atomic_set(&fmdev->tx_cnt, 1); 359 } 360 361 /* Send queued FM TX packets */ 362 skb = skb_dequeue(&fmdev->tx_q); 363 if (!skb) 364 return; 365 366 atomic_dec(&fmdev->tx_cnt); 367 fmdev->pre_op = fm_cb(skb)->fm_op; 368 369 if (fmdev->resp_comp != NULL) 370 fmerr("Response completion handler is not NULL\n"); 371 372 fmdev->resp_comp = fm_cb(skb)->completion; 373 374 /* Write FM packet to ST driver */ 375 len = g_st_write(skb); 376 if (len < 0) { 377 kfree_skb(skb); 378 fmdev->resp_comp = NULL; 379 fmerr("TX tasklet failed to send skb(%p)\n", skb); 380 atomic_set(&fmdev->tx_cnt, 1); 381 } else { 382 fmdev->last_tx_jiffies = jiffies; 383 } 384 } 385 386 /* 387 * Queues FM Channel-8 packet to FM TX queue and schedules FM TX tasklet for 388 * transmission 389 */ 390 static int fm_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload, 391 int payload_len, struct completion *wait_completion) 392 { 393 struct sk_buff *skb; 394 struct fm_cmd_msg_hdr *hdr; 395 int size; 396 397 if (fm_op >= FM_INTERRUPT) { 398 fmerr("Invalid fm opcode - %d\n", fm_op); 399 return -EINVAL; 400 } 401 if (test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag) && payload == NULL) { 402 fmerr("Payload data is NULL during fw download\n"); 403 return -EINVAL; 404 } 405 if (!test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag)) 406 size = 407 FM_CMD_MSG_HDR_SIZE + ((payload == NULL) ? 0 : payload_len); 408 else 409 size = payload_len; 410 411 skb = alloc_skb(size, GFP_ATOMIC); 412 if (!skb) { 413 fmerr("No memory to create new SKB\n"); 414 return -ENOMEM; 415 } 416 /* 417 * Don't fill FM header info for the commands which come from 418 * FM firmware file. 419 */ 420 if (!test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag) || 421 test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) { 422 /* Fill command header info */ 423 hdr = (struct fm_cmd_msg_hdr *)skb_put(skb, FM_CMD_MSG_HDR_SIZE); 424 hdr->hdr = FM_PKT_LOGICAL_CHAN_NUMBER; /* 0x08 */ 425 426 /* 3 (fm_opcode,rd_wr,dlen) + payload len) */ 427 hdr->len = ((payload == NULL) ? 0 : payload_len) + 3; 428 429 /* FM opcode */ 430 hdr->op = fm_op; 431 432 /* read/write type */ 433 hdr->rd_wr = type; 434 hdr->dlen = payload_len; 435 fm_cb(skb)->fm_op = fm_op; 436 437 /* 438 * If firmware download has finished and the command is 439 * not a read command then payload is != NULL - a write 440 * command with u16 payload - convert to be16 441 */ 442 if (payload != NULL) 443 *(__be16 *)payload = cpu_to_be16(*(u16 *)payload); 444 445 } else if (payload != NULL) { 446 fm_cb(skb)->fm_op = *((u8 *)payload + 2); 447 } 448 if (payload != NULL) 449 memcpy(skb_put(skb, payload_len), payload, payload_len); 450 451 fm_cb(skb)->completion = wait_completion; 452 skb_queue_tail(&fmdev->tx_q, skb); 453 tasklet_schedule(&fmdev->tx_task); 454 455 return 0; 456 } 457 458 /* Sends FM Channel-8 command to the chip and waits for the response */ 459 int fmc_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload, 460 unsigned int payload_len, void *response, int *response_len) 461 { 462 struct sk_buff *skb; 463 struct fm_event_msg_hdr *evt_hdr; 464 unsigned long flags; 465 int ret; 466 467 init_completion(&fmdev->maintask_comp); 468 ret = fm_send_cmd(fmdev, fm_op, type, payload, payload_len, 469 &fmdev->maintask_comp); 470 if (ret) 471 return ret; 472 473 if (!wait_for_completion_timeout(&fmdev->maintask_comp, 474 FM_DRV_TX_TIMEOUT)) { 475 fmerr("Timeout(%d sec),didn't get reg" 476 "completion signal from RX tasklet\n", 477 jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000); 478 return -ETIMEDOUT; 479 } 480 if (!fmdev->resp_skb) { 481 fmerr("Response SKB is missing\n"); 482 return -EFAULT; 483 } 484 spin_lock_irqsave(&fmdev->resp_skb_lock, flags); 485 skb = fmdev->resp_skb; 486 fmdev->resp_skb = NULL; 487 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags); 488 489 evt_hdr = (void *)skb->data; 490 if (evt_hdr->status != 0) { 491 fmerr("Received event pkt status(%d) is not zero\n", 492 evt_hdr->status); 493 kfree_skb(skb); 494 return -EIO; 495 } 496 /* Send response data to caller */ 497 if (response != NULL && response_len != NULL && evt_hdr->dlen) { 498 /* Skip header info and copy only response data */ 499 skb_pull(skb, sizeof(struct fm_event_msg_hdr)); 500 memcpy(response, skb->data, evt_hdr->dlen); 501 *response_len = evt_hdr->dlen; 502 } else if (response_len != NULL && evt_hdr->dlen == 0) { 503 *response_len = 0; 504 } 505 kfree_skb(skb); 506 507 return 0; 508 } 509 510 /* --- Helper functions used in FM interrupt handlers ---*/ 511 static inline int check_cmdresp_status(struct fmdev *fmdev, 512 struct sk_buff **skb) 513 { 514 struct fm_event_msg_hdr *fm_evt_hdr; 515 unsigned long flags; 516 517 del_timer(&fmdev->irq_info.timer); 518 519 spin_lock_irqsave(&fmdev->resp_skb_lock, flags); 520 *skb = fmdev->resp_skb; 521 fmdev->resp_skb = NULL; 522 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags); 523 524 fm_evt_hdr = (void *)(*skb)->data; 525 if (fm_evt_hdr->status != 0) { 526 fmerr("irq: opcode %x response status is not zero " 527 "Initiating irq recovery process\n", 528 fm_evt_hdr->op); 529 530 mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT); 531 return -1; 532 } 533 534 return 0; 535 } 536 537 static inline void fm_irq_common_cmd_resp_helper(struct fmdev *fmdev, u8 stage) 538 { 539 struct sk_buff *skb; 540 541 if (!check_cmdresp_status(fmdev, &skb)) 542 fm_irq_call_stage(fmdev, stage); 543 } 544 545 /* 546 * Interrupt process timeout handler. 547 * One of the irq handler did not get proper response from the chip. So take 548 * recovery action here. FM interrupts are disabled in the beginning of 549 * interrupt process. Therefore reset stage index to re-enable default 550 * interrupts. So that next interrupt will be processed as usual. 551 */ 552 static void int_timeout_handler(unsigned long data) 553 { 554 struct fmdev *fmdev; 555 struct fm_irq *fmirq; 556 557 fmdbg("irq: timeout,trying to re-enable fm interrupts\n"); 558 fmdev = (struct fmdev *)data; 559 fmirq = &fmdev->irq_info; 560 fmirq->retry++; 561 562 if (fmirq->retry > FM_IRQ_TIMEOUT_RETRY_MAX) { 563 /* Stop recovery action (interrupt reenable process) and 564 * reset stage index & retry count values */ 565 fmirq->stage = 0; 566 fmirq->retry = 0; 567 fmerr("Recovery action failed during" 568 "irq processing, max retry reached\n"); 569 return; 570 } 571 fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX); 572 } 573 574 /* --------- FM interrupt handlers ------------*/ 575 static void fm_irq_send_flag_getcmd(struct fmdev *fmdev) 576 { 577 u16 flag; 578 579 /* Send FLAG_GET command , to know the source of interrupt */ 580 if (!fm_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, sizeof(flag), NULL)) 581 fm_irq_timeout_stage(fmdev, FM_HANDLE_FLAG_GETCMD_RESP_IDX); 582 } 583 584 static void fm_irq_handle_flag_getcmd_resp(struct fmdev *fmdev) 585 { 586 struct sk_buff *skb; 587 struct fm_event_msg_hdr *fm_evt_hdr; 588 589 if (check_cmdresp_status(fmdev, &skb)) 590 return; 591 592 fm_evt_hdr = (void *)skb->data; 593 594 /* Skip header info and copy only response data */ 595 skb_pull(skb, sizeof(struct fm_event_msg_hdr)); 596 memcpy(&fmdev->irq_info.flag, skb->data, fm_evt_hdr->dlen); 597 598 fmdev->irq_info.flag = be16_to_cpu((__force __be16)fmdev->irq_info.flag); 599 fmdbg("irq: flag register(0x%x)\n", fmdev->irq_info.flag); 600 601 /* Continue next function in interrupt handler table */ 602 fm_irq_call_stage(fmdev, FM_HW_MAL_FUNC_IDX); 603 } 604 605 static void fm_irq_handle_hw_malfunction(struct fmdev *fmdev) 606 { 607 if (fmdev->irq_info.flag & FM_MAL_EVENT & fmdev->irq_info.mask) 608 fmerr("irq: HW MAL int received - do nothing\n"); 609 610 /* Continue next function in interrupt handler table */ 611 fm_irq_call_stage(fmdev, FM_RDS_START_IDX); 612 } 613 614 static void fm_irq_handle_rds_start(struct fmdev *fmdev) 615 { 616 if (fmdev->irq_info.flag & FM_RDS_EVENT & fmdev->irq_info.mask) { 617 fmdbg("irq: rds threshold reached\n"); 618 fmdev->irq_info.stage = FM_RDS_SEND_RDS_GETCMD_IDX; 619 } else { 620 /* Continue next function in interrupt handler table */ 621 fmdev->irq_info.stage = FM_HW_TUNE_OP_ENDED_IDX; 622 } 623 624 fm_irq_call(fmdev); 625 } 626 627 static void fm_irq_send_rdsdata_getcmd(struct fmdev *fmdev) 628 { 629 /* Send the command to read RDS data from the chip */ 630 if (!fm_send_cmd(fmdev, RDS_DATA_GET, REG_RD, NULL, 631 (FM_RX_RDS_FIFO_THRESHOLD * 3), NULL)) 632 fm_irq_timeout_stage(fmdev, FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX); 633 } 634 635 /* Keeps track of current RX channel AF (Alternate Frequency) */ 636 static void fm_rx_update_af_cache(struct fmdev *fmdev, u8 af) 637 { 638 struct tuned_station_info *stat_info = &fmdev->rx.stat_info; 639 u8 reg_idx = fmdev->rx.region.fm_band; 640 u8 index; 641 u32 freq; 642 643 /* First AF indicates the number of AF follows. Reset the list */ 644 if ((af >= FM_RDS_1_AF_FOLLOWS) && (af <= FM_RDS_25_AF_FOLLOWS)) { 645 fmdev->rx.stat_info.af_list_max = (af - FM_RDS_1_AF_FOLLOWS + 1); 646 fmdev->rx.stat_info.afcache_size = 0; 647 fmdbg("No of expected AF : %d\n", fmdev->rx.stat_info.af_list_max); 648 return; 649 } 650 651 if (af < FM_RDS_MIN_AF) 652 return; 653 if (reg_idx == FM_BAND_EUROPE_US && af > FM_RDS_MAX_AF) 654 return; 655 if (reg_idx == FM_BAND_JAPAN && af > FM_RDS_MAX_AF_JAPAN) 656 return; 657 658 freq = fmdev->rx.region.bot_freq + (af * 100); 659 if (freq == fmdev->rx.freq) { 660 fmdbg("Current freq(%d) is matching with received AF(%d)\n", 661 fmdev->rx.freq, freq); 662 return; 663 } 664 /* Do check in AF cache */ 665 for (index = 0; index < stat_info->afcache_size; index++) { 666 if (stat_info->af_cache[index] == freq) 667 break; 668 } 669 /* Reached the limit of the list - ignore the next AF */ 670 if (index == stat_info->af_list_max) { 671 fmdbg("AF cache is full\n"); 672 return; 673 } 674 /* 675 * If we reached the end of the list then this AF is not 676 * in the list - add it. 677 */ 678 if (index == stat_info->afcache_size) { 679 fmdbg("Storing AF %d to cache index %d\n", freq, index); 680 stat_info->af_cache[index] = freq; 681 stat_info->afcache_size++; 682 } 683 } 684 685 /* 686 * Converts RDS buffer data from big endian format 687 * to little endian format. 688 */ 689 static void fm_rdsparse_swapbytes(struct fmdev *fmdev, 690 struct fm_rdsdata_format *rds_format) 691 { 692 u8 index = 0; 693 u8 *rds_buff; 694 695 /* 696 * Since in Orca the 2 RDS Data bytes are in little endian and 697 * in Dolphin they are in big endian, the parsing of the RDS data 698 * is chip dependent 699 */ 700 if (fmdev->asci_id != 0x6350) { 701 rds_buff = &rds_format->data.groupdatabuff.buff[0]; 702 while (index + 1 < FM_RX_RDS_INFO_FIELD_MAX) { 703 swap(rds_buff[index], rds_buff[index + 1]); 704 index += 2; 705 } 706 } 707 } 708 709 static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *fmdev) 710 { 711 struct sk_buff *skb; 712 struct fm_rdsdata_format rds_fmt; 713 struct fm_rds *rds = &fmdev->rx.rds; 714 unsigned long group_idx, flags; 715 u8 *rds_data, meta_data, tmpbuf[FM_RDS_BLK_SIZE]; 716 u8 type, blk_idx; 717 u16 cur_picode; 718 u32 rds_len; 719 720 if (check_cmdresp_status(fmdev, &skb)) 721 return; 722 723 /* Skip header info */ 724 skb_pull(skb, sizeof(struct fm_event_msg_hdr)); 725 rds_data = skb->data; 726 rds_len = skb->len; 727 728 /* Parse the RDS data */ 729 while (rds_len >= FM_RDS_BLK_SIZE) { 730 meta_data = rds_data[2]; 731 /* Get the type: 0=A, 1=B, 2=C, 3=C', 4=D, 5=E */ 732 type = (meta_data & 0x07); 733 734 /* Transform the blk type into index sequence (0, 1, 2, 3, 4) */ 735 blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1)); 736 fmdbg("Block index:%d(%s)\n", blk_idx, 737 (meta_data & FM_RDS_STATUS_ERR_MASK) ? "Bad" : "Ok"); 738 739 if ((meta_data & FM_RDS_STATUS_ERR_MASK) != 0) 740 break; 741 742 if (blk_idx > FM_RDS_BLK_IDX_D) { 743 fmdbg("Block sequence mismatch\n"); 744 rds->last_blk_idx = -1; 745 break; 746 } 747 748 /* Skip checkword (control) byte and copy only data byte */ 749 memcpy(&rds_fmt.data.groupdatabuff. 750 buff[blk_idx * (FM_RDS_BLK_SIZE - 1)], 751 rds_data, (FM_RDS_BLK_SIZE - 1)); 752 753 rds->last_blk_idx = blk_idx; 754 755 /* If completed a whole group then handle it */ 756 if (blk_idx == FM_RDS_BLK_IDX_D) { 757 fmdbg("Good block received\n"); 758 fm_rdsparse_swapbytes(fmdev, &rds_fmt); 759 760 /* 761 * Extract PI code and store in local cache. 762 * We need this during AF switch processing. 763 */ 764 cur_picode = be16_to_cpu((__force __be16)rds_fmt.data.groupgeneral.pidata); 765 if (fmdev->rx.stat_info.picode != cur_picode) 766 fmdev->rx.stat_info.picode = cur_picode; 767 768 fmdbg("picode:%d\n", cur_picode); 769 770 group_idx = (rds_fmt.data.groupgeneral.blk_b[0] >> 3); 771 fmdbg("(fmdrv):Group:%ld%s\n", group_idx/2, 772 (group_idx % 2) ? "B" : "A"); 773 774 group_idx = 1 << (rds_fmt.data.groupgeneral.blk_b[0] >> 3); 775 if (group_idx == FM_RDS_GROUP_TYPE_MASK_0A) { 776 fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[0]); 777 fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[1]); 778 } 779 } 780 rds_len -= FM_RDS_BLK_SIZE; 781 rds_data += FM_RDS_BLK_SIZE; 782 } 783 784 /* Copy raw rds data to internal rds buffer */ 785 rds_data = skb->data; 786 rds_len = skb->len; 787 788 spin_lock_irqsave(&fmdev->rds_buff_lock, flags); 789 while (rds_len > 0) { 790 /* 791 * Fill RDS buffer as per V4L2 specification. 792 * Store control byte 793 */ 794 type = (rds_data[2] & 0x07); 795 blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1)); 796 tmpbuf[2] = blk_idx; /* Offset name */ 797 tmpbuf[2] |= blk_idx << 3; /* Received offset */ 798 799 /* Store data byte */ 800 tmpbuf[0] = rds_data[0]; 801 tmpbuf[1] = rds_data[1]; 802 803 memcpy(&rds->buff[rds->wr_idx], &tmpbuf, FM_RDS_BLK_SIZE); 804 rds->wr_idx = (rds->wr_idx + FM_RDS_BLK_SIZE) % rds->buf_size; 805 806 /* Check for overflow & start over */ 807 if (rds->wr_idx == rds->rd_idx) { 808 fmdbg("RDS buffer overflow\n"); 809 rds->wr_idx = 0; 810 rds->rd_idx = 0; 811 break; 812 } 813 rds_len -= FM_RDS_BLK_SIZE; 814 rds_data += FM_RDS_BLK_SIZE; 815 } 816 spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); 817 818 /* Wakeup read queue */ 819 if (rds->wr_idx != rds->rd_idx) 820 wake_up_interruptible(&rds->read_queue); 821 822 fm_irq_call_stage(fmdev, FM_RDS_FINISH_IDX); 823 } 824 825 static void fm_irq_handle_rds_finish(struct fmdev *fmdev) 826 { 827 fm_irq_call_stage(fmdev, FM_HW_TUNE_OP_ENDED_IDX); 828 } 829 830 static void fm_irq_handle_tune_op_ended(struct fmdev *fmdev) 831 { 832 if (fmdev->irq_info.flag & (FM_FR_EVENT | FM_BL_EVENT) & fmdev-> 833 irq_info.mask) { 834 fmdbg("irq: tune ended/bandlimit reached\n"); 835 if (test_and_clear_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag)) { 836 fmdev->irq_info.stage = FM_AF_JUMP_RD_FREQ_IDX; 837 } else { 838 complete(&fmdev->maintask_comp); 839 fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX; 840 } 841 } else 842 fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX; 843 844 fm_irq_call(fmdev); 845 } 846 847 static void fm_irq_handle_power_enb(struct fmdev *fmdev) 848 { 849 if (fmdev->irq_info.flag & FM_POW_ENB_EVENT) { 850 fmdbg("irq: Power Enabled/Disabled\n"); 851 complete(&fmdev->maintask_comp); 852 } 853 854 fm_irq_call_stage(fmdev, FM_LOW_RSSI_START_IDX); 855 } 856 857 static void fm_irq_handle_low_rssi_start(struct fmdev *fmdev) 858 { 859 if ((fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) && 860 (fmdev->irq_info.flag & FM_LEV_EVENT & fmdev->irq_info.mask) && 861 (fmdev->rx.freq != FM_UNDEFINED_FREQ) && 862 (fmdev->rx.stat_info.afcache_size != 0)) { 863 fmdbg("irq: rssi level has fallen below threshold level\n"); 864 865 /* Disable further low RSSI interrupts */ 866 fmdev->irq_info.mask &= ~FM_LEV_EVENT; 867 868 fmdev->rx.afjump_idx = 0; 869 fmdev->rx.freq_before_jump = fmdev->rx.freq; 870 fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX; 871 } else { 872 /* Continue next function in interrupt handler table */ 873 fmdev->irq_info.stage = FM_SEND_INTMSK_CMD_IDX; 874 } 875 876 fm_irq_call(fmdev); 877 } 878 879 static void fm_irq_afjump_set_pi(struct fmdev *fmdev) 880 { 881 u16 payload; 882 883 /* Set PI code - must be updated if the AF list is not empty */ 884 payload = fmdev->rx.stat_info.picode; 885 if (!fm_send_cmd(fmdev, RDS_PI_SET, REG_WR, &payload, sizeof(payload), NULL)) 886 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_RESP_IDX); 887 } 888 889 static void fm_irq_handle_set_pi_resp(struct fmdev *fmdev) 890 { 891 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SETPI_MASK_IDX); 892 } 893 894 /* 895 * Set PI mask. 896 * 0xFFFF = Enable PI code matching 897 * 0x0000 = Disable PI code matching 898 */ 899 static void fm_irq_afjump_set_pimask(struct fmdev *fmdev) 900 { 901 u16 payload; 902 903 payload = 0x0000; 904 if (!fm_send_cmd(fmdev, RDS_PI_MASK_SET, REG_WR, &payload, sizeof(payload), NULL)) 905 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX); 906 } 907 908 static void fm_irq_handle_set_pimask_resp(struct fmdev *fmdev) 909 { 910 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SET_AF_FREQ_IDX); 911 } 912 913 static void fm_irq_afjump_setfreq(struct fmdev *fmdev) 914 { 915 u16 frq_index; 916 u16 payload; 917 918 fmdbg("Swtich to %d KHz\n", fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]); 919 frq_index = (fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx] - 920 fmdev->rx.region.bot_freq) / FM_FREQ_MUL; 921 922 payload = frq_index; 923 if (!fm_send_cmd(fmdev, AF_FREQ_SET, REG_WR, &payload, sizeof(payload), NULL)) 924 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX); 925 } 926 927 static void fm_irq_handle_setfreq_resp(struct fmdev *fmdev) 928 { 929 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_ENABLE_INT_IDX); 930 } 931 932 static void fm_irq_afjump_enableint(struct fmdev *fmdev) 933 { 934 u16 payload; 935 936 /* Enable FR (tuning operation ended) interrupt */ 937 payload = FM_FR_EVENT; 938 if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, sizeof(payload), NULL)) 939 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_ENABLE_INT_RESP_IDX); 940 } 941 942 static void fm_irq_afjump_enableint_resp(struct fmdev *fmdev) 943 { 944 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_START_AFJUMP_IDX); 945 } 946 947 static void fm_irq_start_afjump(struct fmdev *fmdev) 948 { 949 u16 payload; 950 951 payload = FM_TUNER_AF_JUMP_MODE; 952 if (!fm_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload, 953 sizeof(payload), NULL)) 954 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX); 955 } 956 957 static void fm_irq_handle_start_afjump_resp(struct fmdev *fmdev) 958 { 959 struct sk_buff *skb; 960 961 if (check_cmdresp_status(fmdev, &skb)) 962 return; 963 964 fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX; 965 set_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag); 966 clear_bit(FM_INTTASK_RUNNING, &fmdev->flag); 967 } 968 969 static void fm_irq_afjump_rd_freq(struct fmdev *fmdev) 970 { 971 u16 payload; 972 973 if (!fm_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, sizeof(payload), NULL)) 974 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_RD_FREQ_RESP_IDX); 975 } 976 977 static void fm_irq_afjump_rd_freq_resp(struct fmdev *fmdev) 978 { 979 struct sk_buff *skb; 980 u16 read_freq; 981 u32 curr_freq, jumped_freq; 982 983 if (check_cmdresp_status(fmdev, &skb)) 984 return; 985 986 /* Skip header info and copy only response data */ 987 skb_pull(skb, sizeof(struct fm_event_msg_hdr)); 988 memcpy(&read_freq, skb->data, sizeof(read_freq)); 989 read_freq = be16_to_cpu((__force __be16)read_freq); 990 curr_freq = fmdev->rx.region.bot_freq + ((u32)read_freq * FM_FREQ_MUL); 991 992 jumped_freq = fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]; 993 994 /* If the frequency was changed the jump succeeded */ 995 if ((curr_freq != fmdev->rx.freq_before_jump) && (curr_freq == jumped_freq)) { 996 fmdbg("Successfully switched to alternate freq %d\n", curr_freq); 997 fmdev->rx.freq = curr_freq; 998 fm_rx_reset_rds_cache(fmdev); 999 1000 /* AF feature is on, enable low level RSSI interrupt */ 1001 if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) 1002 fmdev->irq_info.mask |= FM_LEV_EVENT; 1003 1004 fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX; 1005 } else { /* jump to the next freq in the AF list */ 1006 fmdev->rx.afjump_idx++; 1007 1008 /* If we reached the end of the list - stop searching */ 1009 if (fmdev->rx.afjump_idx >= fmdev->rx.stat_info.afcache_size) { 1010 fmdbg("AF switch processing failed\n"); 1011 fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX; 1012 } else { /* AF List is not over - try next one */ 1013 1014 fmdbg("Trying next freq in AF cache\n"); 1015 fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX; 1016 } 1017 } 1018 fm_irq_call(fmdev); 1019 } 1020 1021 static void fm_irq_handle_low_rssi_finish(struct fmdev *fmdev) 1022 { 1023 fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX); 1024 } 1025 1026 static void fm_irq_send_intmsk_cmd(struct fmdev *fmdev) 1027 { 1028 u16 payload; 1029 1030 /* Re-enable FM interrupts */ 1031 payload = fmdev->irq_info.mask; 1032 1033 if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, 1034 sizeof(payload), NULL)) 1035 fm_irq_timeout_stage(fmdev, FM_HANDLE_INTMSK_CMD_RESP_IDX); 1036 } 1037 1038 static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *fmdev) 1039 { 1040 struct sk_buff *skb; 1041 1042 if (check_cmdresp_status(fmdev, &skb)) 1043 return; 1044 /* 1045 * This is last function in interrupt table to be executed. 1046 * So, reset stage index to 0. 1047 */ 1048 fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX; 1049 1050 /* Start processing any pending interrupt */ 1051 if (test_and_clear_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag)) 1052 fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev); 1053 else 1054 clear_bit(FM_INTTASK_RUNNING, &fmdev->flag); 1055 } 1056 1057 /* Returns availability of RDS data in internel buffer */ 1058 int fmc_is_rds_data_available(struct fmdev *fmdev, struct file *file, 1059 struct poll_table_struct *pts) 1060 { 1061 poll_wait(file, &fmdev->rx.rds.read_queue, pts); 1062 if (fmdev->rx.rds.rd_idx != fmdev->rx.rds.wr_idx) 1063 return 0; 1064 1065 return -EAGAIN; 1066 } 1067 1068 /* Copies RDS data from internal buffer to user buffer */ 1069 int fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file, 1070 u8 __user *buf, size_t count) 1071 { 1072 u32 block_count; 1073 u8 tmpbuf[FM_RDS_BLK_SIZE]; 1074 unsigned long flags; 1075 int ret; 1076 1077 if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) { 1078 if (file->f_flags & O_NONBLOCK) 1079 return -EWOULDBLOCK; 1080 1081 ret = wait_event_interruptible(fmdev->rx.rds.read_queue, 1082 (fmdev->rx.rds.wr_idx != fmdev->rx.rds.rd_idx)); 1083 if (ret) 1084 return -EINTR; 1085 } 1086 1087 /* Calculate block count from byte count */ 1088 count /= FM_RDS_BLK_SIZE; 1089 block_count = 0; 1090 ret = 0; 1091 1092 while (block_count < count) { 1093 spin_lock_irqsave(&fmdev->rds_buff_lock, flags); 1094 1095 if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) { 1096 spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); 1097 break; 1098 } 1099 memcpy(tmpbuf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx], 1100 FM_RDS_BLK_SIZE); 1101 fmdev->rx.rds.rd_idx += FM_RDS_BLK_SIZE; 1102 if (fmdev->rx.rds.rd_idx >= fmdev->rx.rds.buf_size) 1103 fmdev->rx.rds.rd_idx = 0; 1104 1105 spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); 1106 1107 if (copy_to_user(buf, tmpbuf, FM_RDS_BLK_SIZE)) 1108 break; 1109 1110 block_count++; 1111 buf += FM_RDS_BLK_SIZE; 1112 ret += FM_RDS_BLK_SIZE; 1113 } 1114 return ret; 1115 } 1116 1117 int fmc_set_freq(struct fmdev *fmdev, u32 freq_to_set) 1118 { 1119 switch (fmdev->curr_fmmode) { 1120 case FM_MODE_RX: 1121 return fm_rx_set_freq(fmdev, freq_to_set); 1122 1123 case FM_MODE_TX: 1124 return fm_tx_set_freq(fmdev, freq_to_set); 1125 1126 default: 1127 return -EINVAL; 1128 } 1129 } 1130 1131 int fmc_get_freq(struct fmdev *fmdev, u32 *cur_tuned_frq) 1132 { 1133 if (fmdev->rx.freq == FM_UNDEFINED_FREQ) { 1134 fmerr("RX frequency is not set\n"); 1135 return -EPERM; 1136 } 1137 if (cur_tuned_frq == NULL) { 1138 fmerr("Invalid memory\n"); 1139 return -ENOMEM; 1140 } 1141 1142 switch (fmdev->curr_fmmode) { 1143 case FM_MODE_RX: 1144 *cur_tuned_frq = fmdev->rx.freq; 1145 return 0; 1146 1147 case FM_MODE_TX: 1148 *cur_tuned_frq = 0; /* TODO : Change this later */ 1149 return 0; 1150 1151 default: 1152 return -EINVAL; 1153 } 1154 1155 } 1156 1157 int fmc_set_region(struct fmdev *fmdev, u8 region_to_set) 1158 { 1159 switch (fmdev->curr_fmmode) { 1160 case FM_MODE_RX: 1161 return fm_rx_set_region(fmdev, region_to_set); 1162 1163 case FM_MODE_TX: 1164 return fm_tx_set_region(fmdev, region_to_set); 1165 1166 default: 1167 return -EINVAL; 1168 } 1169 } 1170 1171 int fmc_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset) 1172 { 1173 switch (fmdev->curr_fmmode) { 1174 case FM_MODE_RX: 1175 return fm_rx_set_mute_mode(fmdev, mute_mode_toset); 1176 1177 case FM_MODE_TX: 1178 return fm_tx_set_mute_mode(fmdev, mute_mode_toset); 1179 1180 default: 1181 return -EINVAL; 1182 } 1183 } 1184 1185 int fmc_set_stereo_mono(struct fmdev *fmdev, u16 mode) 1186 { 1187 switch (fmdev->curr_fmmode) { 1188 case FM_MODE_RX: 1189 return fm_rx_set_stereo_mono(fmdev, mode); 1190 1191 case FM_MODE_TX: 1192 return fm_tx_set_stereo_mono(fmdev, mode); 1193 1194 default: 1195 return -EINVAL; 1196 } 1197 } 1198 1199 int fmc_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis) 1200 { 1201 switch (fmdev->curr_fmmode) { 1202 case FM_MODE_RX: 1203 return fm_rx_set_rds_mode(fmdev, rds_en_dis); 1204 1205 case FM_MODE_TX: 1206 return fm_tx_set_rds_mode(fmdev, rds_en_dis); 1207 1208 default: 1209 return -EINVAL; 1210 } 1211 } 1212 1213 /* Sends power off command to the chip */ 1214 static int fm_power_down(struct fmdev *fmdev) 1215 { 1216 u16 payload; 1217 int ret; 1218 1219 if (!test_bit(FM_CORE_READY, &fmdev->flag)) { 1220 fmerr("FM core is not ready\n"); 1221 return -EPERM; 1222 } 1223 if (fmdev->curr_fmmode == FM_MODE_OFF) { 1224 fmdbg("FM chip is already in OFF state\n"); 1225 return 0; 1226 } 1227 1228 payload = 0x0; 1229 ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload, 1230 sizeof(payload), NULL, NULL); 1231 if (ret < 0) 1232 return ret; 1233 1234 return fmc_release(fmdev); 1235 } 1236 1237 /* Reads init command from FM firmware file and loads to the chip */ 1238 static int fm_download_firmware(struct fmdev *fmdev, const u8 *fw_name) 1239 { 1240 const struct firmware *fw_entry; 1241 struct bts_header *fw_header; 1242 struct bts_action *action; 1243 struct bts_action_delay *delay; 1244 u8 *fw_data; 1245 int ret, fw_len, cmd_cnt; 1246 1247 cmd_cnt = 0; 1248 set_bit(FM_FW_DW_INPROGRESS, &fmdev->flag); 1249 1250 ret = request_firmware(&fw_entry, fw_name, 1251 &fmdev->radio_dev->dev); 1252 if (ret < 0) { 1253 fmerr("Unable to read firmware(%s) content\n", fw_name); 1254 return ret; 1255 } 1256 fmdbg("Firmware(%s) length : %zu bytes\n", fw_name, fw_entry->size); 1257 1258 fw_data = (void *)fw_entry->data; 1259 fw_len = fw_entry->size; 1260 1261 fw_header = (struct bts_header *)fw_data; 1262 if (fw_header->magic != FM_FW_FILE_HEADER_MAGIC) { 1263 fmerr("%s not a legal TI firmware file\n", fw_name); 1264 ret = -EINVAL; 1265 goto rel_fw; 1266 } 1267 fmdbg("FW(%s) magic number : 0x%x\n", fw_name, fw_header->magic); 1268 1269 /* Skip file header info , we already verified it */ 1270 fw_data += sizeof(struct bts_header); 1271 fw_len -= sizeof(struct bts_header); 1272 1273 while (fw_data && fw_len > 0) { 1274 action = (struct bts_action *)fw_data; 1275 1276 switch (action->type) { 1277 case ACTION_SEND_COMMAND: /* Send */ 1278 if (fmc_send_cmd(fmdev, 0, 0, action->data, 1279 action->size, NULL, NULL)) 1280 goto rel_fw; 1281 1282 cmd_cnt++; 1283 break; 1284 1285 case ACTION_DELAY: /* Delay */ 1286 delay = (struct bts_action_delay *)action->data; 1287 mdelay(delay->msec); 1288 break; 1289 } 1290 1291 fw_data += (sizeof(struct bts_action) + (action->size)); 1292 fw_len -= (sizeof(struct bts_action) + (action->size)); 1293 } 1294 fmdbg("Firmware commands(%d) loaded to chip\n", cmd_cnt); 1295 rel_fw: 1296 release_firmware(fw_entry); 1297 clear_bit(FM_FW_DW_INPROGRESS, &fmdev->flag); 1298 1299 return ret; 1300 } 1301 1302 /* Loads default RX configuration to the chip */ 1303 static int load_default_rx_configuration(struct fmdev *fmdev) 1304 { 1305 int ret; 1306 1307 ret = fm_rx_set_volume(fmdev, FM_DEFAULT_RX_VOLUME); 1308 if (ret < 0) 1309 return ret; 1310 1311 return fm_rx_set_rssi_threshold(fmdev, FM_DEFAULT_RSSI_THRESHOLD); 1312 } 1313 1314 /* Does FM power on sequence */ 1315 static int fm_power_up(struct fmdev *fmdev, u8 mode) 1316 { 1317 u16 payload; 1318 __be16 asic_id, asic_ver; 1319 int resp_len, ret; 1320 u8 fw_name[50]; 1321 1322 if (mode >= FM_MODE_ENTRY_MAX) { 1323 fmerr("Invalid firmware download option\n"); 1324 return -EINVAL; 1325 } 1326 1327 /* 1328 * Initialize FM common module. FM GPIO toggling is 1329 * taken care in Shared Transport driver. 1330 */ 1331 ret = fmc_prepare(fmdev); 1332 if (ret < 0) { 1333 fmerr("Unable to prepare FM Common\n"); 1334 return ret; 1335 } 1336 1337 payload = FM_ENABLE; 1338 if (fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload, 1339 sizeof(payload), NULL, NULL)) 1340 goto rel; 1341 1342 /* Allow the chip to settle down in Channel-8 mode */ 1343 msleep(20); 1344 1345 if (fmc_send_cmd(fmdev, ASIC_ID_GET, REG_RD, NULL, 1346 sizeof(asic_id), &asic_id, &resp_len)) 1347 goto rel; 1348 1349 if (fmc_send_cmd(fmdev, ASIC_VER_GET, REG_RD, NULL, 1350 sizeof(asic_ver), &asic_ver, &resp_len)) 1351 goto rel; 1352 1353 fmdbg("ASIC ID: 0x%x , ASIC Version: %d\n", 1354 be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); 1355 1356 sprintf(fw_name, "%s_%x.%d.bts", FM_FMC_FW_FILE_START, 1357 be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); 1358 1359 ret = fm_download_firmware(fmdev, fw_name); 1360 if (ret < 0) { 1361 fmdbg("Failed to download firmware file %s\n", fw_name); 1362 goto rel; 1363 } 1364 sprintf(fw_name, "%s_%x.%d.bts", (mode == FM_MODE_RX) ? 1365 FM_RX_FW_FILE_START : FM_TX_FW_FILE_START, 1366 be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); 1367 1368 ret = fm_download_firmware(fmdev, fw_name); 1369 if (ret < 0) { 1370 fmdbg("Failed to download firmware file %s\n", fw_name); 1371 goto rel; 1372 } else 1373 return ret; 1374 rel: 1375 return fmc_release(fmdev); 1376 } 1377 1378 /* Set FM Modes(TX, RX, OFF) */ 1379 int fmc_set_mode(struct fmdev *fmdev, u8 fm_mode) 1380 { 1381 int ret = 0; 1382 1383 if (fm_mode >= FM_MODE_ENTRY_MAX) { 1384 fmerr("Invalid FM mode\n"); 1385 return -EINVAL; 1386 } 1387 if (fmdev->curr_fmmode == fm_mode) { 1388 fmdbg("Already fm is in mode(%d)\n", fm_mode); 1389 return ret; 1390 } 1391 1392 switch (fm_mode) { 1393 case FM_MODE_OFF: /* OFF Mode */ 1394 ret = fm_power_down(fmdev); 1395 if (ret < 0) { 1396 fmerr("Failed to set OFF mode\n"); 1397 return ret; 1398 } 1399 break; 1400 1401 case FM_MODE_TX: /* TX Mode */ 1402 case FM_MODE_RX: /* RX Mode */ 1403 /* Power down before switching to TX or RX mode */ 1404 if (fmdev->curr_fmmode != FM_MODE_OFF) { 1405 ret = fm_power_down(fmdev); 1406 if (ret < 0) { 1407 fmerr("Failed to set OFF mode\n"); 1408 return ret; 1409 } 1410 msleep(30); 1411 } 1412 ret = fm_power_up(fmdev, fm_mode); 1413 if (ret < 0) { 1414 fmerr("Failed to load firmware\n"); 1415 return ret; 1416 } 1417 } 1418 fmdev->curr_fmmode = fm_mode; 1419 1420 /* Set default configuration */ 1421 if (fmdev->curr_fmmode == FM_MODE_RX) { 1422 fmdbg("Loading default rx configuration..\n"); 1423 ret = load_default_rx_configuration(fmdev); 1424 if (ret < 0) 1425 fmerr("Failed to load default values\n"); 1426 } 1427 1428 return ret; 1429 } 1430 1431 /* Returns current FM mode (TX, RX, OFF) */ 1432 int fmc_get_mode(struct fmdev *fmdev, u8 *fmmode) 1433 { 1434 if (!test_bit(FM_CORE_READY, &fmdev->flag)) { 1435 fmerr("FM core is not ready\n"); 1436 return -EPERM; 1437 } 1438 if (fmmode == NULL) { 1439 fmerr("Invalid memory\n"); 1440 return -ENOMEM; 1441 } 1442 1443 *fmmode = fmdev->curr_fmmode; 1444 return 0; 1445 } 1446 1447 /* Called by ST layer when FM packet is available */ 1448 static long fm_st_receive(void *arg, struct sk_buff *skb) 1449 { 1450 struct fmdev *fmdev; 1451 1452 fmdev = (struct fmdev *)arg; 1453 1454 if (skb == NULL) { 1455 fmerr("Invalid SKB received from ST\n"); 1456 return -EFAULT; 1457 } 1458 1459 if (skb->cb[0] != FM_PKT_LOGICAL_CHAN_NUMBER) { 1460 fmerr("Received SKB (%p) is not FM Channel 8 pkt\n", skb); 1461 return -EINVAL; 1462 } 1463 1464 memcpy(skb_push(skb, 1), &skb->cb[0], 1); 1465 skb_queue_tail(&fmdev->rx_q, skb); 1466 tasklet_schedule(&fmdev->rx_task); 1467 1468 return 0; 1469 } 1470 1471 /* 1472 * Called by ST layer to indicate protocol registration completion 1473 * status. 1474 */ 1475 static void fm_st_reg_comp_cb(void *arg, int data) 1476 { 1477 struct fmdev *fmdev; 1478 1479 fmdev = (struct fmdev *)arg; 1480 fmdev->streg_cbdata = data; 1481 complete(&wait_for_fmdrv_reg_comp); 1482 } 1483 1484 /* 1485 * This function will be called from FM V4L2 open function. 1486 * Register with ST driver and initialize driver data. 1487 */ 1488 int fmc_prepare(struct fmdev *fmdev) 1489 { 1490 static struct st_proto_s fm_st_proto; 1491 int ret; 1492 1493 if (test_bit(FM_CORE_READY, &fmdev->flag)) { 1494 fmdbg("FM Core is already up\n"); 1495 return 0; 1496 } 1497 1498 memset(&fm_st_proto, 0, sizeof(fm_st_proto)); 1499 fm_st_proto.recv = fm_st_receive; 1500 fm_st_proto.match_packet = NULL; 1501 fm_st_proto.reg_complete_cb = fm_st_reg_comp_cb; 1502 fm_st_proto.write = NULL; /* TI ST driver will fill write pointer */ 1503 fm_st_proto.priv_data = fmdev; 1504 fm_st_proto.chnl_id = 0x08; 1505 fm_st_proto.max_frame_size = 0xff; 1506 fm_st_proto.hdr_len = 1; 1507 fm_st_proto.offset_len_in_hdr = 0; 1508 fm_st_proto.len_size = 1; 1509 fm_st_proto.reserve = 1; 1510 1511 ret = st_register(&fm_st_proto); 1512 if (ret == -EINPROGRESS) { 1513 init_completion(&wait_for_fmdrv_reg_comp); 1514 fmdev->streg_cbdata = -EINPROGRESS; 1515 fmdbg("%s waiting for ST reg completion signal\n", __func__); 1516 1517 if (!wait_for_completion_timeout(&wait_for_fmdrv_reg_comp, 1518 FM_ST_REG_TIMEOUT)) { 1519 fmerr("Timeout(%d sec), didn't get reg " 1520 "completion signal from ST\n", 1521 jiffies_to_msecs(FM_ST_REG_TIMEOUT) / 1000); 1522 return -ETIMEDOUT; 1523 } 1524 if (fmdev->streg_cbdata != 0) { 1525 fmerr("ST reg comp CB called with error " 1526 "status %d\n", fmdev->streg_cbdata); 1527 return -EAGAIN; 1528 } 1529 1530 ret = 0; 1531 } else if (ret == -1) { 1532 fmerr("st_register failed %d\n", ret); 1533 return -EAGAIN; 1534 } 1535 1536 if (fm_st_proto.write != NULL) { 1537 g_st_write = fm_st_proto.write; 1538 } else { 1539 fmerr("Failed to get ST write func pointer\n"); 1540 ret = st_unregister(&fm_st_proto); 1541 if (ret < 0) 1542 fmerr("st_unregister failed %d\n", ret); 1543 return -EAGAIN; 1544 } 1545 1546 spin_lock_init(&fmdev->rds_buff_lock); 1547 spin_lock_init(&fmdev->resp_skb_lock); 1548 1549 /* Initialize TX queue and TX tasklet */ 1550 skb_queue_head_init(&fmdev->tx_q); 1551 tasklet_init(&fmdev->tx_task, send_tasklet, (unsigned long)fmdev); 1552 1553 /* Initialize RX Queue and RX tasklet */ 1554 skb_queue_head_init(&fmdev->rx_q); 1555 tasklet_init(&fmdev->rx_task, recv_tasklet, (unsigned long)fmdev); 1556 1557 fmdev->irq_info.stage = 0; 1558 atomic_set(&fmdev->tx_cnt, 1); 1559 fmdev->resp_comp = NULL; 1560 1561 init_timer(&fmdev->irq_info.timer); 1562 fmdev->irq_info.timer.function = &int_timeout_handler; 1563 fmdev->irq_info.timer.data = (unsigned long)fmdev; 1564 /*TODO: add FM_STIC_EVENT later */ 1565 fmdev->irq_info.mask = FM_MAL_EVENT; 1566 1567 /* Region info */ 1568 fmdev->rx.region = region_configs[default_radio_region]; 1569 1570 fmdev->rx.mute_mode = FM_MUTE_OFF; 1571 fmdev->rx.rf_depend_mute = FM_RX_RF_DEPENDENT_MUTE_OFF; 1572 fmdev->rx.rds.flag = FM_RDS_DISABLE; 1573 fmdev->rx.freq = FM_UNDEFINED_FREQ; 1574 fmdev->rx.rds_mode = FM_RDS_SYSTEM_RDS; 1575 fmdev->rx.af_mode = FM_RX_RDS_AF_SWITCH_MODE_OFF; 1576 fmdev->irq_info.retry = 0; 1577 1578 fm_rx_reset_rds_cache(fmdev); 1579 init_waitqueue_head(&fmdev->rx.rds.read_queue); 1580 1581 fm_rx_reset_station_info(fmdev); 1582 set_bit(FM_CORE_READY, &fmdev->flag); 1583 1584 return ret; 1585 } 1586 1587 /* 1588 * This function will be called from FM V4L2 release function. 1589 * Unregister from ST driver. 1590 */ 1591 int fmc_release(struct fmdev *fmdev) 1592 { 1593 static struct st_proto_s fm_st_proto; 1594 int ret; 1595 1596 if (!test_bit(FM_CORE_READY, &fmdev->flag)) { 1597 fmdbg("FM Core is already down\n"); 1598 return 0; 1599 } 1600 /* Service pending read */ 1601 wake_up_interruptible(&fmdev->rx.rds.read_queue); 1602 1603 tasklet_kill(&fmdev->tx_task); 1604 tasklet_kill(&fmdev->rx_task); 1605 1606 skb_queue_purge(&fmdev->tx_q); 1607 skb_queue_purge(&fmdev->rx_q); 1608 1609 fmdev->resp_comp = NULL; 1610 fmdev->rx.freq = 0; 1611 1612 memset(&fm_st_proto, 0, sizeof(fm_st_proto)); 1613 fm_st_proto.chnl_id = 0x08; 1614 1615 ret = st_unregister(&fm_st_proto); 1616 1617 if (ret < 0) 1618 fmerr("Failed to de-register FM from ST %d\n", ret); 1619 else 1620 fmdbg("Successfully unregistered from ST\n"); 1621 1622 clear_bit(FM_CORE_READY, &fmdev->flag); 1623 return ret; 1624 } 1625 1626 /* 1627 * Module init function. Ask FM V4L module to register video device. 1628 * Allocate memory for FM driver context and RX RDS buffer. 1629 */ 1630 static int __init fm_drv_init(void) 1631 { 1632 struct fmdev *fmdev = NULL; 1633 int ret = -ENOMEM; 1634 1635 fmdbg("FM driver version %s\n", FM_DRV_VERSION); 1636 1637 fmdev = kzalloc(sizeof(struct fmdev), GFP_KERNEL); 1638 if (NULL == fmdev) { 1639 fmerr("Can't allocate operation structure memory\n"); 1640 return ret; 1641 } 1642 fmdev->rx.rds.buf_size = default_rds_buf * FM_RDS_BLK_SIZE; 1643 fmdev->rx.rds.buff = kzalloc(fmdev->rx.rds.buf_size, GFP_KERNEL); 1644 if (NULL == fmdev->rx.rds.buff) { 1645 fmerr("Can't allocate rds ring buffer\n"); 1646 goto rel_dev; 1647 } 1648 1649 ret = fm_v4l2_init_video_device(fmdev, radio_nr); 1650 if (ret < 0) 1651 goto rel_rdsbuf; 1652 1653 fmdev->irq_info.handlers = int_handler_table; 1654 fmdev->curr_fmmode = FM_MODE_OFF; 1655 fmdev->tx_data.pwr_lvl = FM_PWR_LVL_DEF; 1656 fmdev->tx_data.preemph = FM_TX_PREEMPH_50US; 1657 return ret; 1658 1659 rel_rdsbuf: 1660 kfree(fmdev->rx.rds.buff); 1661 rel_dev: 1662 kfree(fmdev); 1663 1664 return ret; 1665 } 1666 1667 /* Module exit function. Ask FM V4L module to unregister video device */ 1668 static void __exit fm_drv_exit(void) 1669 { 1670 struct fmdev *fmdev = NULL; 1671 1672 fmdev = fm_v4l2_deinit_video_device(); 1673 if (fmdev != NULL) { 1674 kfree(fmdev->rx.rds.buff); 1675 kfree(fmdev); 1676 } 1677 } 1678 1679 module_init(fm_drv_init); 1680 module_exit(fm_drv_exit); 1681 1682 /* ------------- Module Info ------------- */ 1683 MODULE_AUTHOR("Manjunatha Halli <manjunatha_halli@ti.com>"); 1684 MODULE_DESCRIPTION("FM Driver for TI's Connectivity chip. " FM_DRV_VERSION); 1685 MODULE_VERSION(FM_DRV_VERSION); 1686 MODULE_LICENSE("GPL"); 1687