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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * FM Driver for Connectivity chip of Texas Instruments.4 *5 * This sub-module of FM driver is common for FM RX and TX6 * functionality. This module is responsible for:7 * 1) Forming group of Channel-8 commands to perform particular8 * functionality (eg., frequency set require more than9 * one Channel-8 command to be sent to the chip).10 * 2) Sending each Channel-8 command to the chip and reading11 * response back over Shared Transport.12 * 3) Managing TX and RX Queues and BH bh Works.13 * 4) Handling FM Interrupt packet and taking appropriate action.14 * 5) Loading FM firmware to the chip (common, FM TX, and FM RX15 * firmware files based on mode selection)16 *17 * Copyright (C) 2011 Texas Instruments18 * Author: Raja Mani <raja_mani@ti.com>19 * Author: Manjunatha Halli <manjunatha_halli@ti.com>20 */21 22#include <linux/delay.h>23#include <linux/firmware.h>24#include <linux/module.h>25#include <linux/nospec.h>26#include <linux/jiffies.h>27 28#include "fmdrv.h"29#include "fmdrv_v4l2.h"30#include "fmdrv_common.h"31#include <linux/ti_wilink_st.h>32#include "fmdrv_rx.h"33#include "fmdrv_tx.h"34 35/* Region info */36static struct region_info region_configs[] = {37 /* Europe/US */38 {39 .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,40 .bot_freq = 87500, /* 87.5 MHz */41 .top_freq = 108000, /* 108 MHz */42 .fm_band = 0,43 },44 /* Japan */45 {46 .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,47 .bot_freq = 76000, /* 76 MHz */48 .top_freq = 90000, /* 90 MHz */49 .fm_band = 1,50 },51};52 53/* Band selection */54static u8 default_radio_region; /* Europe/US */55module_param(default_radio_region, byte, 0);56MODULE_PARM_DESC(default_radio_region, "Region: 0=Europe/US, 1=Japan");57 58/* RDS buffer blocks */59static u32 default_rds_buf = 300;60module_param(default_rds_buf, uint, 0444);61MODULE_PARM_DESC(default_rds_buf, "RDS buffer entries");62 63/* Radio Nr */64static u32 radio_nr = -1;65module_param(radio_nr, int, 0444);66MODULE_PARM_DESC(radio_nr, "Radio Nr");67 68/* FM irq handlers forward declaration */69static void fm_irq_send_flag_getcmd(struct fmdev *);70static void fm_irq_handle_flag_getcmd_resp(struct fmdev *);71static void fm_irq_handle_hw_malfunction(struct fmdev *);72static void fm_irq_handle_rds_start(struct fmdev *);73static void fm_irq_send_rdsdata_getcmd(struct fmdev *);74static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *);75static void fm_irq_handle_rds_finish(struct fmdev *);76static void fm_irq_handle_tune_op_ended(struct fmdev *);77static void fm_irq_handle_power_enb(struct fmdev *);78static void fm_irq_handle_low_rssi_start(struct fmdev *);79static void fm_irq_afjump_set_pi(struct fmdev *);80static void fm_irq_handle_set_pi_resp(struct fmdev *);81static void fm_irq_afjump_set_pimask(struct fmdev *);82static void fm_irq_handle_set_pimask_resp(struct fmdev *);83static void fm_irq_afjump_setfreq(struct fmdev *);84static void fm_irq_handle_setfreq_resp(struct fmdev *);85static void fm_irq_afjump_enableint(struct fmdev *);86static void fm_irq_afjump_enableint_resp(struct fmdev *);87static void fm_irq_start_afjump(struct fmdev *);88static void fm_irq_handle_start_afjump_resp(struct fmdev *);89static void fm_irq_afjump_rd_freq(struct fmdev *);90static void fm_irq_afjump_rd_freq_resp(struct fmdev *);91static void fm_irq_handle_low_rssi_finish(struct fmdev *);92static void fm_irq_send_intmsk_cmd(struct fmdev *);93static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *);94 95/*96 * When FM common module receives interrupt packet, following handlers97 * will be executed one after another to service the interrupt(s)98 */99enum fmc_irq_handler_index {100 FM_SEND_FLAG_GETCMD_IDX,101 FM_HANDLE_FLAG_GETCMD_RESP_IDX,102 103 /* HW malfunction irq handler */104 FM_HW_MAL_FUNC_IDX,105 106 /* RDS threshold reached irq handler */107 FM_RDS_START_IDX,108 FM_RDS_SEND_RDS_GETCMD_IDX,109 FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX,110 FM_RDS_FINISH_IDX,111 112 /* Tune operation ended irq handler */113 FM_HW_TUNE_OP_ENDED_IDX,114 115 /* TX power enable irq handler */116 FM_HW_POWER_ENB_IDX,117 118 /* Low RSSI irq handler */119 FM_LOW_RSSI_START_IDX,120 FM_AF_JUMP_SETPI_IDX,121 FM_AF_JUMP_HANDLE_SETPI_RESP_IDX,122 FM_AF_JUMP_SETPI_MASK_IDX,123 FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX,124 FM_AF_JUMP_SET_AF_FREQ_IDX,125 FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX,126 FM_AF_JUMP_ENABLE_INT_IDX,127 FM_AF_JUMP_ENABLE_INT_RESP_IDX,128 FM_AF_JUMP_START_AFJUMP_IDX,129 FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX,130 FM_AF_JUMP_RD_FREQ_IDX,131 FM_AF_JUMP_RD_FREQ_RESP_IDX,132 FM_LOW_RSSI_FINISH_IDX,133 134 /* Interrupt process post action */135 FM_SEND_INTMSK_CMD_IDX,136 FM_HANDLE_INTMSK_CMD_RESP_IDX,137};138 139/* FM interrupt handler table */140static int_handler_prototype int_handler_table[] = {141 fm_irq_send_flag_getcmd,142 fm_irq_handle_flag_getcmd_resp,143 fm_irq_handle_hw_malfunction,144 fm_irq_handle_rds_start, /* RDS threshold reached irq handler */145 fm_irq_send_rdsdata_getcmd,146 fm_irq_handle_rdsdata_getcmd_resp,147 fm_irq_handle_rds_finish,148 fm_irq_handle_tune_op_ended,149 fm_irq_handle_power_enb, /* TX power enable irq handler */150 fm_irq_handle_low_rssi_start,151 fm_irq_afjump_set_pi,152 fm_irq_handle_set_pi_resp,153 fm_irq_afjump_set_pimask,154 fm_irq_handle_set_pimask_resp,155 fm_irq_afjump_setfreq,156 fm_irq_handle_setfreq_resp,157 fm_irq_afjump_enableint,158 fm_irq_afjump_enableint_resp,159 fm_irq_start_afjump,160 fm_irq_handle_start_afjump_resp,161 fm_irq_afjump_rd_freq,162 fm_irq_afjump_rd_freq_resp,163 fm_irq_handle_low_rssi_finish,164 fm_irq_send_intmsk_cmd, /* Interrupt process post action */165 fm_irq_handle_intmsk_cmd_resp166};167 168static long (*g_st_write) (struct sk_buff *skb);169static struct completion wait_for_fmdrv_reg_comp;170 171static inline void fm_irq_call(struct fmdev *fmdev)172{173 fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev);174}175 176/* Continue next function in interrupt handler table */177static inline void fm_irq_call_stage(struct fmdev *fmdev, u8 stage)178{179 fmdev->irq_info.stage = stage;180 fm_irq_call(fmdev);181}182 183static inline void fm_irq_timeout_stage(struct fmdev *fmdev, u8 stage)184{185 fmdev->irq_info.stage = stage;186 mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT);187}188 189#ifdef FM_DUMP_TXRX_PKT190 /* To dump outgoing FM Channel-8 packets */191inline void dump_tx_skb_data(struct sk_buff *skb)192{193 int len, len_org;194 u8 index;195 struct fm_cmd_msg_hdr *cmd_hdr;196 197 cmd_hdr = (struct fm_cmd_msg_hdr *)skb->data;198 printk(KERN_INFO "<<%shdr:%02x len:%02x opcode:%02x type:%s dlen:%02x",199 fm_cb(skb)->completion ? " " : "*", cmd_hdr->hdr,200 cmd_hdr->len, cmd_hdr->op,201 cmd_hdr->rd_wr ? "RD" : "WR", cmd_hdr->dlen);202 203 len_org = skb->len - FM_CMD_MSG_HDR_SIZE;204 if (len_org > 0) {205 printk(KERN_CONT "\n data(%d): ", cmd_hdr->dlen);206 len = min(len_org, 14);207 for (index = 0; index < len; index++)208 printk(KERN_CONT "%x ",209 skb->data[FM_CMD_MSG_HDR_SIZE + index]);210 printk(KERN_CONT "%s", (len_org > 14) ? ".." : "");211 }212 printk(KERN_CONT "\n");213}214 215 /* To dump incoming FM Channel-8 packets */216inline void dump_rx_skb_data(struct sk_buff *skb)217{218 int len, len_org;219 u8 index;220 struct fm_event_msg_hdr *evt_hdr;221 222 evt_hdr = (struct fm_event_msg_hdr *)skb->data;223 printk(KERN_INFO ">> hdr:%02x len:%02x sts:%02x numhci:%02x opcode:%02x type:%s dlen:%02x",224 evt_hdr->hdr, evt_hdr->len,225 evt_hdr->status, evt_hdr->num_fm_hci_cmds, evt_hdr->op,226 (evt_hdr->rd_wr) ? "RD" : "WR", evt_hdr->dlen);227 228 len_org = skb->len - FM_EVT_MSG_HDR_SIZE;229 if (len_org > 0) {230 printk(KERN_CONT "\n data(%d): ", evt_hdr->dlen);231 len = min(len_org, 14);232 for (index = 0; index < len; index++)233 printk(KERN_CONT "%x ",234 skb->data[FM_EVT_MSG_HDR_SIZE + index]);235 printk(KERN_CONT "%s", (len_org > 14) ? ".." : "");236 }237 printk(KERN_CONT "\n");238}239#endif240 241void fmc_update_region_info(struct fmdev *fmdev, u8 region_to_set)242{243 fmdev->rx.region = region_configs[region_to_set];244}245 246/*247 * FM common sub-module will queue this bh work whenever it receives248 * FM packet from ST driver.249 */250static void recv_bh_work(struct work_struct *t)251{252 struct fmdev *fmdev;253 struct fm_irq *irq_info;254 struct fm_event_msg_hdr *evt_hdr;255 struct sk_buff *skb;256 u8 num_fm_hci_cmds;257 unsigned long flags;258 259 fmdev = from_work(fmdev, t, tx_bh_work);260 irq_info = &fmdev->irq_info;261 /* Process all packets in the RX queue */262 while ((skb = skb_dequeue(&fmdev->rx_q))) {263 if (skb->len < sizeof(struct fm_event_msg_hdr)) {264 fmerr("skb(%p) has only %d bytes, at least need %zu bytes to decode\n",265 skb,266 skb->len, sizeof(struct fm_event_msg_hdr));267 kfree_skb(skb);268 continue;269 }270 271 evt_hdr = (void *)skb->data;272 num_fm_hci_cmds = evt_hdr->num_fm_hci_cmds;273 274 /* FM interrupt packet? */275 if (evt_hdr->op == FM_INTERRUPT) {276 /* FM interrupt handler started already? */277 if (!test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {278 set_bit(FM_INTTASK_RUNNING, &fmdev->flag);279 if (irq_info->stage != 0) {280 fmerr("Inval stage resetting to zero\n");281 irq_info->stage = 0;282 }283 284 /*285 * Execute first function in interrupt handler286 * table.287 */288 irq_info->handlers[irq_info->stage](fmdev);289 } else {290 set_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag);291 }292 kfree_skb(skb);293 }294 /* Anyone waiting for this with completion handler? */295 else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp != NULL) {296 297 spin_lock_irqsave(&fmdev->resp_skb_lock, flags);298 fmdev->resp_skb = skb;299 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);300 complete(fmdev->resp_comp);301 302 fmdev->resp_comp = NULL;303 atomic_set(&fmdev->tx_cnt, 1);304 }305 /* Is this for interrupt handler? */306 else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp == NULL) {307 if (fmdev->resp_skb != NULL)308 fmerr("Response SKB ptr not NULL\n");309 310 spin_lock_irqsave(&fmdev->resp_skb_lock, flags);311 fmdev->resp_skb = skb;312 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);313 314 /* Execute interrupt handler where state index points */315 irq_info->handlers[irq_info->stage](fmdev);316 317 kfree_skb(skb);318 atomic_set(&fmdev->tx_cnt, 1);319 } else {320 fmerr("Nobody claimed SKB(%p),purging\n", skb);321 }322 323 /*324 * Check flow control field. If Num_FM_HCI_Commands field is325 * not zero, queue FM TX bh work.326 */327 if (num_fm_hci_cmds && atomic_read(&fmdev->tx_cnt))328 if (!skb_queue_empty(&fmdev->tx_q))329 queue_work(system_bh_wq, &fmdev->tx_bh_work);330 }331}332 333/* FM send_bh_work: is scheduled when FM packet has to be sent to chip */334static void send_bh_work(struct work_struct *t)335{336 struct fmdev *fmdev;337 struct sk_buff *skb;338 int len;339 340 fmdev = from_work(fmdev, t, tx_bh_work);341 342 if (!atomic_read(&fmdev->tx_cnt))343 return;344 345 /* Check, is there any timeout happened to last transmitted packet */346 if (time_is_before_jiffies(fmdev->last_tx_jiffies + FM_DRV_TX_TIMEOUT)) {347 fmerr("TX timeout occurred\n");348 atomic_set(&fmdev->tx_cnt, 1);349 }350 351 /* Send queued FM TX packets */352 skb = skb_dequeue(&fmdev->tx_q);353 if (!skb)354 return;355 356 atomic_dec(&fmdev->tx_cnt);357 fmdev->pre_op = fm_cb(skb)->fm_op;358 359 if (fmdev->resp_comp != NULL)360 fmerr("Response completion handler is not NULL\n");361 362 fmdev->resp_comp = fm_cb(skb)->completion;363 364 /* Write FM packet to ST driver */365 len = g_st_write(skb);366 if (len < 0) {367 kfree_skb(skb);368 fmdev->resp_comp = NULL;369 fmerr("TX bh work failed to send skb(%p)\n", skb);370 atomic_set(&fmdev->tx_cnt, 1);371 } else {372 fmdev->last_tx_jiffies = jiffies;373 }374}375 376/*377 * Queues FM Channel-8 packet to FM TX queue and schedules FM TX bh work for378 * transmission379 */380static int fm_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload,381 int payload_len, struct completion *wait_completion)382{383 struct sk_buff *skb;384 struct fm_cmd_msg_hdr *hdr;385 int size;386 387 if (fm_op >= FM_INTERRUPT) {388 fmerr("Invalid fm opcode - %d\n", fm_op);389 return -EINVAL;390 }391 if (test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag) && payload == NULL) {392 fmerr("Payload data is NULL during fw download\n");393 return -EINVAL;394 }395 if (!test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag))396 size =397 FM_CMD_MSG_HDR_SIZE + ((payload == NULL) ? 0 : payload_len);398 else399 size = payload_len;400 401 skb = alloc_skb(size, GFP_ATOMIC);402 if (!skb) {403 fmerr("No memory to create new SKB\n");404 return -ENOMEM;405 }406 /*407 * Don't fill FM header info for the commands which come from408 * FM firmware file.409 */410 if (!test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag) ||411 test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {412 /* Fill command header info */413 hdr = skb_put(skb, FM_CMD_MSG_HDR_SIZE);414 hdr->hdr = FM_PKT_LOGICAL_CHAN_NUMBER; /* 0x08 */415 416 /* 3 (fm_opcode,rd_wr,dlen) + payload len) */417 hdr->len = ((payload == NULL) ? 0 : payload_len) + 3;418 419 /* FM opcode */420 hdr->op = fm_op;421 422 /* read/write type */423 hdr->rd_wr = type;424 hdr->dlen = payload_len;425 fm_cb(skb)->fm_op = fm_op;426 427 /*428 * If firmware download has finished and the command is429 * not a read command then payload is != NULL - a write430 * command with u16 payload - convert to be16431 */432 if (payload != NULL)433 *(__be16 *)payload = cpu_to_be16(*(u16 *)payload);434 435 } else if (payload != NULL) {436 fm_cb(skb)->fm_op = *((u8 *)payload + 2);437 }438 if (payload != NULL)439 skb_put_data(skb, payload, payload_len);440 441 fm_cb(skb)->completion = wait_completion;442 skb_queue_tail(&fmdev->tx_q, skb);443 queue_work(system_bh_wq, &fmdev->tx_bh_work);444 445 return 0;446}447 448/* Sends FM Channel-8 command to the chip and waits for the response */449int fmc_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload,450 unsigned int payload_len, void *response, int *response_len)451{452 struct sk_buff *skb;453 struct fm_event_msg_hdr *evt_hdr;454 unsigned long flags;455 int ret;456 457 init_completion(&fmdev->maintask_comp);458 ret = fm_send_cmd(fmdev, fm_op, type, payload, payload_len,459 &fmdev->maintask_comp);460 if (ret)461 return ret;462 463 if (!wait_for_completion_timeout(&fmdev->maintask_comp,464 FM_DRV_TX_TIMEOUT)) {465 fmerr("Timeout(%d sec),didn't get regcompletion signal from RX bh work\n",466 jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);467 return -ETIMEDOUT;468 }469 if (!fmdev->resp_skb) {470 fmerr("Response SKB is missing\n");471 return -EFAULT;472 }473 spin_lock_irqsave(&fmdev->resp_skb_lock, flags);474 skb = fmdev->resp_skb;475 fmdev->resp_skb = NULL;476 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);477 478 evt_hdr = (void *)skb->data;479 if (evt_hdr->status != 0) {480 fmerr("Received event pkt status(%d) is not zero\n",481 evt_hdr->status);482 kfree_skb(skb);483 return -EIO;484 }485 /* Send response data to caller */486 if (response != NULL && response_len != NULL && evt_hdr->dlen &&487 evt_hdr->dlen <= payload_len) {488 /* Skip header info and copy only response data */489 skb_pull(skb, sizeof(struct fm_event_msg_hdr));490 memcpy(response, skb->data, evt_hdr->dlen);491 *response_len = evt_hdr->dlen;492 } else if (response_len != NULL && evt_hdr->dlen == 0) {493 *response_len = 0;494 }495 kfree_skb(skb);496 497 return 0;498}499 500/* --- Helper functions used in FM interrupt handlers ---*/501static inline int check_cmdresp_status(struct fmdev *fmdev,502 struct sk_buff **skb)503{504 struct fm_event_msg_hdr *fm_evt_hdr;505 unsigned long flags;506 507 del_timer(&fmdev->irq_info.timer);508 509 spin_lock_irqsave(&fmdev->resp_skb_lock, flags);510 *skb = fmdev->resp_skb;511 fmdev->resp_skb = NULL;512 spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);513 514 fm_evt_hdr = (void *)(*skb)->data;515 if (fm_evt_hdr->status != 0) {516 fmerr("irq: opcode %x response status is not zero Initiating irq recovery process\n",517 fm_evt_hdr->op);518 519 mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT);520 return -1;521 }522 523 return 0;524}525 526static inline void fm_irq_common_cmd_resp_helper(struct fmdev *fmdev, u8 stage)527{528 struct sk_buff *skb;529 530 if (!check_cmdresp_status(fmdev, &skb))531 fm_irq_call_stage(fmdev, stage);532}533 534/*535 * Interrupt process timeout handler.536 * One of the irq handler did not get proper response from the chip. So take537 * recovery action here. FM interrupts are disabled in the beginning of538 * interrupt process. Therefore reset stage index to re-enable default539 * interrupts. So that next interrupt will be processed as usual.540 */541static void int_timeout_handler(struct timer_list *t)542{543 struct fmdev *fmdev;544 struct fm_irq *fmirq;545 546 fmdbg("irq: timeout,trying to re-enable fm interrupts\n");547 fmdev = from_timer(fmdev, t, irq_info.timer);548 fmirq = &fmdev->irq_info;549 fmirq->retry++;550 551 if (fmirq->retry > FM_IRQ_TIMEOUT_RETRY_MAX) {552 /* Stop recovery action (interrupt reenable process) and553 * reset stage index & retry count values */554 fmirq->stage = 0;555 fmirq->retry = 0;556 fmerr("Recovery action failed duringirq processing, max retry reached\n");557 return;558 }559 fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX);560}561 562/* --------- FM interrupt handlers ------------*/563static void fm_irq_send_flag_getcmd(struct fmdev *fmdev)564{565 u16 flag;566 567 /* Send FLAG_GET command , to know the source of interrupt */568 if (!fm_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, sizeof(flag), NULL))569 fm_irq_timeout_stage(fmdev, FM_HANDLE_FLAG_GETCMD_RESP_IDX);570}571 572static void fm_irq_handle_flag_getcmd_resp(struct fmdev *fmdev)573{574 struct sk_buff *skb;575 struct fm_event_msg_hdr *fm_evt_hdr;576 577 if (check_cmdresp_status(fmdev, &skb))578 return;579 580 fm_evt_hdr = (void *)skb->data;581 if (fm_evt_hdr->dlen > sizeof(fmdev->irq_info.flag))582 return;583 584 /* Skip header info and copy only response data */585 skb_pull(skb, sizeof(struct fm_event_msg_hdr));586 memcpy(&fmdev->irq_info.flag, skb->data, fm_evt_hdr->dlen);587 588 fmdev->irq_info.flag = be16_to_cpu((__force __be16)fmdev->irq_info.flag);589 fmdbg("irq: flag register(0x%x)\n", fmdev->irq_info.flag);590 591 /* Continue next function in interrupt handler table */592 fm_irq_call_stage(fmdev, FM_HW_MAL_FUNC_IDX);593}594 595static void fm_irq_handle_hw_malfunction(struct fmdev *fmdev)596{597 if (fmdev->irq_info.flag & FM_MAL_EVENT & fmdev->irq_info.mask)598 fmerr("irq: HW MAL int received - do nothing\n");599 600 /* Continue next function in interrupt handler table */601 fm_irq_call_stage(fmdev, FM_RDS_START_IDX);602}603 604static void fm_irq_handle_rds_start(struct fmdev *fmdev)605{606 if (fmdev->irq_info.flag & FM_RDS_EVENT & fmdev->irq_info.mask) {607 fmdbg("irq: rds threshold reached\n");608 fmdev->irq_info.stage = FM_RDS_SEND_RDS_GETCMD_IDX;609 } else {610 /* Continue next function in interrupt handler table */611 fmdev->irq_info.stage = FM_HW_TUNE_OP_ENDED_IDX;612 }613 614 fm_irq_call(fmdev);615}616 617static void fm_irq_send_rdsdata_getcmd(struct fmdev *fmdev)618{619 /* Send the command to read RDS data from the chip */620 if (!fm_send_cmd(fmdev, RDS_DATA_GET, REG_RD, NULL,621 (FM_RX_RDS_FIFO_THRESHOLD * 3), NULL))622 fm_irq_timeout_stage(fmdev, FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX);623}624 625/* Keeps track of current RX channel AF (Alternate Frequency) */626static void fm_rx_update_af_cache(struct fmdev *fmdev, u8 af)627{628 struct tuned_station_info *stat_info = &fmdev->rx.stat_info;629 u8 reg_idx = fmdev->rx.region.fm_band;630 u8 index;631 u32 freq;632 633 /* First AF indicates the number of AF follows. Reset the list */634 if ((af >= FM_RDS_1_AF_FOLLOWS) && (af <= FM_RDS_25_AF_FOLLOWS)) {635 fmdev->rx.stat_info.af_list_max = (af - FM_RDS_1_AF_FOLLOWS + 1);636 fmdev->rx.stat_info.afcache_size = 0;637 fmdbg("No of expected AF : %d\n", fmdev->rx.stat_info.af_list_max);638 return;639 }640 641 if (af < FM_RDS_MIN_AF)642 return;643 if (reg_idx == FM_BAND_EUROPE_US && af > FM_RDS_MAX_AF)644 return;645 if (reg_idx == FM_BAND_JAPAN && af > FM_RDS_MAX_AF_JAPAN)646 return;647 648 freq = fmdev->rx.region.bot_freq + (af * 100);649 if (freq == fmdev->rx.freq) {650 fmdbg("Current freq(%d) is matching with received AF(%d)\n",651 fmdev->rx.freq, freq);652 return;653 }654 /* Do check in AF cache */655 for (index = 0; index < stat_info->afcache_size; index++) {656 if (stat_info->af_cache[index] == freq)657 break;658 }659 /* Reached the limit of the list - ignore the next AF */660 if (index == stat_info->af_list_max) {661 fmdbg("AF cache is full\n");662 return;663 }664 /*665 * If we reached the end of the list then this AF is not666 * in the list - add it.667 */668 if (index == stat_info->afcache_size) {669 fmdbg("Storing AF %d to cache index %d\n", freq, index);670 stat_info->af_cache[index] = freq;671 stat_info->afcache_size++;672 }673}674 675/*676 * Converts RDS buffer data from big endian format677 * to little endian format.678 */679static void fm_rdsparse_swapbytes(struct fmdev *fmdev,680 struct fm_rdsdata_format *rds_format)681{682 u8 index = 0;683 u8 *rds_buff;684 685 /*686 * Since in Orca the 2 RDS Data bytes are in little endian and687 * in Dolphin they are in big endian, the parsing of the RDS data688 * is chip dependent689 */690 if (fmdev->asci_id != 0x6350) {691 rds_buff = &rds_format->data.groupdatabuff.buff[0];692 while (index + 1 < FM_RX_RDS_INFO_FIELD_MAX) {693 swap(rds_buff[index], rds_buff[index + 1]);694 index += 2;695 }696 }697}698 699static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *fmdev)700{701 struct sk_buff *skb;702 struct fm_rdsdata_format rds_fmt;703 struct fm_rds *rds = &fmdev->rx.rds;704 unsigned long group_idx, flags;705 u8 *rds_data, meta_data, tmpbuf[FM_RDS_BLK_SIZE];706 u8 type, blk_idx, idx;707 u16 cur_picode;708 u32 rds_len;709 710 if (check_cmdresp_status(fmdev, &skb))711 return;712 713 /* Skip header info */714 skb_pull(skb, sizeof(struct fm_event_msg_hdr));715 rds_data = skb->data;716 rds_len = skb->len;717 718 /* Parse the RDS data */719 while (rds_len >= FM_RDS_BLK_SIZE) {720 meta_data = rds_data[2];721 /* Get the type: 0=A, 1=B, 2=C, 3=C', 4=D, 5=E */722 type = (meta_data & 0x07);723 724 /* Transform the blk type into index sequence (0, 1, 2, 3, 4) */725 blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1));726 fmdbg("Block index:%d(%s)\n", blk_idx,727 (meta_data & FM_RDS_STATUS_ERR_MASK) ? "Bad" : "Ok");728 729 if ((meta_data & FM_RDS_STATUS_ERR_MASK) != 0)730 break;731 732 if (blk_idx > FM_RDS_BLK_IDX_D) {733 fmdbg("Block sequence mismatch\n");734 rds->last_blk_idx = -1;735 break;736 }737 738 /* Skip checkword (control) byte and copy only data byte */739 idx = array_index_nospec(blk_idx * (FM_RDS_BLK_SIZE - 1),740 FM_RX_RDS_INFO_FIELD_MAX - (FM_RDS_BLK_SIZE - 1));741 742 memcpy(&rds_fmt.data.groupdatabuff.buff[idx], rds_data,743 FM_RDS_BLK_SIZE - 1);744 745 rds->last_blk_idx = blk_idx;746 747 /* If completed a whole group then handle it */748 if (blk_idx == FM_RDS_BLK_IDX_D) {749 fmdbg("Good block received\n");750 fm_rdsparse_swapbytes(fmdev, &rds_fmt);751 752 /*753 * Extract PI code and store in local cache.754 * We need this during AF switch processing.755 */756 cur_picode = be16_to_cpu((__force __be16)rds_fmt.data.groupgeneral.pidata);757 if (fmdev->rx.stat_info.picode != cur_picode)758 fmdev->rx.stat_info.picode = cur_picode;759 760 fmdbg("picode:%d\n", cur_picode);761 762 group_idx = (rds_fmt.data.groupgeneral.blk_b[0] >> 3);763 fmdbg("(fmdrv):Group:%ld%s\n", group_idx/2,764 (group_idx % 2) ? "B" : "A");765 766 group_idx = 1 << (rds_fmt.data.groupgeneral.blk_b[0] >> 3);767 if (group_idx == FM_RDS_GROUP_TYPE_MASK_0A) {768 fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[0]);769 fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[1]);770 }771 }772 rds_len -= FM_RDS_BLK_SIZE;773 rds_data += FM_RDS_BLK_SIZE;774 }775 776 /* Copy raw rds data to internal rds buffer */777 rds_data = skb->data;778 rds_len = skb->len;779 780 spin_lock_irqsave(&fmdev->rds_buff_lock, flags);781 while (rds_len > 0) {782 /*783 * Fill RDS buffer as per V4L2 specification.784 * Store control byte785 */786 type = (rds_data[2] & 0x07);787 blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1));788 tmpbuf[2] = blk_idx; /* Offset name */789 tmpbuf[2] |= blk_idx << 3; /* Received offset */790 791 /* Store data byte */792 tmpbuf[0] = rds_data[0];793 tmpbuf[1] = rds_data[1];794 795 memcpy(&rds->buff[rds->wr_idx], &tmpbuf, FM_RDS_BLK_SIZE);796 rds->wr_idx = (rds->wr_idx + FM_RDS_BLK_SIZE) % rds->buf_size;797 798 /* Check for overflow & start over */799 if (rds->wr_idx == rds->rd_idx) {800 fmdbg("RDS buffer overflow\n");801 rds->wr_idx = 0;802 rds->rd_idx = 0;803 break;804 }805 rds_len -= FM_RDS_BLK_SIZE;806 rds_data += FM_RDS_BLK_SIZE;807 }808 spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);809 810 /* Wakeup read queue */811 if (rds->wr_idx != rds->rd_idx)812 wake_up_interruptible(&rds->read_queue);813 814 fm_irq_call_stage(fmdev, FM_RDS_FINISH_IDX);815}816 817static void fm_irq_handle_rds_finish(struct fmdev *fmdev)818{819 fm_irq_call_stage(fmdev, FM_HW_TUNE_OP_ENDED_IDX);820}821 822static void fm_irq_handle_tune_op_ended(struct fmdev *fmdev)823{824 if (fmdev->irq_info.flag & (FM_FR_EVENT | FM_BL_EVENT) & fmdev->825 irq_info.mask) {826 fmdbg("irq: tune ended/bandlimit reached\n");827 if (test_and_clear_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag)) {828 fmdev->irq_info.stage = FM_AF_JUMP_RD_FREQ_IDX;829 } else {830 complete(&fmdev->maintask_comp);831 fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX;832 }833 } else834 fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX;835 836 fm_irq_call(fmdev);837}838 839static void fm_irq_handle_power_enb(struct fmdev *fmdev)840{841 if (fmdev->irq_info.flag & FM_POW_ENB_EVENT) {842 fmdbg("irq: Power Enabled/Disabled\n");843 complete(&fmdev->maintask_comp);844 }845 846 fm_irq_call_stage(fmdev, FM_LOW_RSSI_START_IDX);847}848 849static void fm_irq_handle_low_rssi_start(struct fmdev *fmdev)850{851 if ((fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) &&852 (fmdev->irq_info.flag & FM_LEV_EVENT & fmdev->irq_info.mask) &&853 (fmdev->rx.freq != FM_UNDEFINED_FREQ) &&854 (fmdev->rx.stat_info.afcache_size != 0)) {855 fmdbg("irq: rssi level has fallen below threshold level\n");856 857 /* Disable further low RSSI interrupts */858 fmdev->irq_info.mask &= ~FM_LEV_EVENT;859 860 fmdev->rx.afjump_idx = 0;861 fmdev->rx.freq_before_jump = fmdev->rx.freq;862 fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX;863 } else {864 /* Continue next function in interrupt handler table */865 fmdev->irq_info.stage = FM_SEND_INTMSK_CMD_IDX;866 }867 868 fm_irq_call(fmdev);869}870 871static void fm_irq_afjump_set_pi(struct fmdev *fmdev)872{873 u16 payload;874 875 /* Set PI code - must be updated if the AF list is not empty */876 payload = fmdev->rx.stat_info.picode;877 if (!fm_send_cmd(fmdev, RDS_PI_SET, REG_WR, &payload, sizeof(payload), NULL))878 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_RESP_IDX);879}880 881static void fm_irq_handle_set_pi_resp(struct fmdev *fmdev)882{883 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SETPI_MASK_IDX);884}885 886/*887 * Set PI mask.888 * 0xFFFF = Enable PI code matching889 * 0x0000 = Disable PI code matching890 */891static void fm_irq_afjump_set_pimask(struct fmdev *fmdev)892{893 u16 payload;894 895 payload = 0x0000;896 if (!fm_send_cmd(fmdev, RDS_PI_MASK_SET, REG_WR, &payload, sizeof(payload), NULL))897 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX);898}899 900static void fm_irq_handle_set_pimask_resp(struct fmdev *fmdev)901{902 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SET_AF_FREQ_IDX);903}904 905static void fm_irq_afjump_setfreq(struct fmdev *fmdev)906{907 u16 frq_index;908 u16 payload;909 910 fmdbg("Switch to %d KHz\n", fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]);911 frq_index = (fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx] -912 fmdev->rx.region.bot_freq) / FM_FREQ_MUL;913 914 payload = frq_index;915 if (!fm_send_cmd(fmdev, AF_FREQ_SET, REG_WR, &payload, sizeof(payload), NULL))916 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX);917}918 919static void fm_irq_handle_setfreq_resp(struct fmdev *fmdev)920{921 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_ENABLE_INT_IDX);922}923 924static void fm_irq_afjump_enableint(struct fmdev *fmdev)925{926 u16 payload;927 928 /* Enable FR (tuning operation ended) interrupt */929 payload = FM_FR_EVENT;930 if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, sizeof(payload), NULL))931 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_ENABLE_INT_RESP_IDX);932}933 934static void fm_irq_afjump_enableint_resp(struct fmdev *fmdev)935{936 fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_START_AFJUMP_IDX);937}938 939static void fm_irq_start_afjump(struct fmdev *fmdev)940{941 u16 payload;942 943 payload = FM_TUNER_AF_JUMP_MODE;944 if (!fm_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,945 sizeof(payload), NULL))946 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX);947}948 949static void fm_irq_handle_start_afjump_resp(struct fmdev *fmdev)950{951 struct sk_buff *skb;952 953 if (check_cmdresp_status(fmdev, &skb))954 return;955 956 fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX;957 set_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag);958 clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);959}960 961static void fm_irq_afjump_rd_freq(struct fmdev *fmdev)962{963 u16 payload;964 965 if (!fm_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, sizeof(payload), NULL))966 fm_irq_timeout_stage(fmdev, FM_AF_JUMP_RD_FREQ_RESP_IDX);967}968 969static void fm_irq_afjump_rd_freq_resp(struct fmdev *fmdev)970{971 struct sk_buff *skb;972 u16 read_freq;973 u32 curr_freq, jumped_freq;974 975 if (check_cmdresp_status(fmdev, &skb))976 return;977 978 /* Skip header info and copy only response data */979 skb_pull(skb, sizeof(struct fm_event_msg_hdr));980 memcpy(&read_freq, skb->data, sizeof(read_freq));981 read_freq = be16_to_cpu((__force __be16)read_freq);982 curr_freq = fmdev->rx.region.bot_freq + ((u32)read_freq * FM_FREQ_MUL);983 984 jumped_freq = fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx];985 986 /* If the frequency was changed the jump succeeded */987 if ((curr_freq != fmdev->rx.freq_before_jump) && (curr_freq == jumped_freq)) {988 fmdbg("Successfully switched to alternate freq %d\n", curr_freq);989 fmdev->rx.freq = curr_freq;990 fm_rx_reset_rds_cache(fmdev);991 992 /* AF feature is on, enable low level RSSI interrupt */993 if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)994 fmdev->irq_info.mask |= FM_LEV_EVENT;995 996 fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX;997 } else { /* jump to the next freq in the AF list */998 fmdev->rx.afjump_idx++;999 1000 /* If we reached the end of the list - stop searching */1001 if (fmdev->rx.afjump_idx >= fmdev->rx.stat_info.afcache_size) {1002 fmdbg("AF switch processing failed\n");1003 fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX;1004 } else { /* AF List is not over - try next one */1005 1006 fmdbg("Trying next freq in AF cache\n");1007 fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX;1008 }1009 }1010 fm_irq_call(fmdev);1011}1012 1013static void fm_irq_handle_low_rssi_finish(struct fmdev *fmdev)1014{1015 fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX);1016}1017 1018static void fm_irq_send_intmsk_cmd(struct fmdev *fmdev)1019{1020 u16 payload;1021 1022 /* Re-enable FM interrupts */1023 payload = fmdev->irq_info.mask;1024 1025 if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,1026 sizeof(payload), NULL))1027 fm_irq_timeout_stage(fmdev, FM_HANDLE_INTMSK_CMD_RESP_IDX);1028}1029 1030static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *fmdev)1031{1032 struct sk_buff *skb;1033 1034 if (check_cmdresp_status(fmdev, &skb))1035 return;1036 /*1037 * This is last function in interrupt table to be executed.1038 * So, reset stage index to 0.1039 */1040 fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX;1041 1042 /* Start processing any pending interrupt */1043 if (test_and_clear_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag))1044 fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev);1045 else1046 clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);1047}1048 1049/* Returns availability of RDS data in internal buffer */1050int fmc_is_rds_data_available(struct fmdev *fmdev, struct file *file,1051 struct poll_table_struct *pts)1052{1053 poll_wait(file, &fmdev->rx.rds.read_queue, pts);1054 if (fmdev->rx.rds.rd_idx != fmdev->rx.rds.wr_idx)1055 return 0;1056 1057 return -EAGAIN;1058}1059 1060/* Copies RDS data from internal buffer to user buffer */1061int fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file,1062 u8 __user *buf, size_t count)1063{1064 u32 block_count;1065 u8 tmpbuf[FM_RDS_BLK_SIZE];1066 unsigned long flags;1067 int ret;1068 1069 if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) {1070 if (file->f_flags & O_NONBLOCK)1071 return -EWOULDBLOCK;1072 1073 ret = wait_event_interruptible(fmdev->rx.rds.read_queue,1074 (fmdev->rx.rds.wr_idx != fmdev->rx.rds.rd_idx));1075 if (ret)1076 return -EINTR;1077 }1078 1079 /* Calculate block count from byte count */1080 count /= FM_RDS_BLK_SIZE;1081 block_count = 0;1082 ret = 0;1083 1084 while (block_count < count) {1085 spin_lock_irqsave(&fmdev->rds_buff_lock, flags);1086 1087 if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) {1088 spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);1089 break;1090 }1091 memcpy(tmpbuf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx],1092 FM_RDS_BLK_SIZE);1093 fmdev->rx.rds.rd_idx += FM_RDS_BLK_SIZE;1094 if (fmdev->rx.rds.rd_idx >= fmdev->rx.rds.buf_size)1095 fmdev->rx.rds.rd_idx = 0;1096 1097 spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);1098 1099 if (copy_to_user(buf, tmpbuf, FM_RDS_BLK_SIZE))1100 break;1101 1102 block_count++;1103 buf += FM_RDS_BLK_SIZE;1104 ret += FM_RDS_BLK_SIZE;1105 }1106 return ret;1107}1108 1109int fmc_set_freq(struct fmdev *fmdev, u32 freq_to_set)1110{1111 switch (fmdev->curr_fmmode) {1112 case FM_MODE_RX:1113 return fm_rx_set_freq(fmdev, freq_to_set);1114 1115 case FM_MODE_TX:1116 return fm_tx_set_freq(fmdev, freq_to_set);1117 1118 default:1119 return -EINVAL;1120 }1121}1122 1123int fmc_get_freq(struct fmdev *fmdev, u32 *cur_tuned_frq)1124{1125 if (fmdev->rx.freq == FM_UNDEFINED_FREQ) {1126 fmerr("RX frequency is not set\n");1127 return -EPERM;1128 }1129 if (cur_tuned_frq == NULL) {1130 fmerr("Invalid memory\n");1131 return -ENOMEM;1132 }1133 1134 switch (fmdev->curr_fmmode) {1135 case FM_MODE_RX:1136 *cur_tuned_frq = fmdev->rx.freq;1137 return 0;1138 1139 case FM_MODE_TX:1140 *cur_tuned_frq = 0; /* TODO : Change this later */1141 return 0;1142 1143 default:1144 return -EINVAL;1145 }1146 1147}1148 1149int fmc_set_region(struct fmdev *fmdev, u8 region_to_set)1150{1151 switch (fmdev->curr_fmmode) {1152 case FM_MODE_RX:1153 return fm_rx_set_region(fmdev, region_to_set);1154 1155 case FM_MODE_TX:1156 return fm_tx_set_region(fmdev, region_to_set);1157 1158 default:1159 return -EINVAL;1160 }1161}1162 1163int fmc_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)1164{1165 switch (fmdev->curr_fmmode) {1166 case FM_MODE_RX:1167 return fm_rx_set_mute_mode(fmdev, mute_mode_toset);1168 1169 case FM_MODE_TX:1170 return fm_tx_set_mute_mode(fmdev, mute_mode_toset);1171 1172 default:1173 return -EINVAL;1174 }1175}1176 1177int fmc_set_stereo_mono(struct fmdev *fmdev, u16 mode)1178{1179 switch (fmdev->curr_fmmode) {1180 case FM_MODE_RX:1181 return fm_rx_set_stereo_mono(fmdev, mode);1182 1183 case FM_MODE_TX:1184 return fm_tx_set_stereo_mono(fmdev, mode);1185 1186 default:1187 return -EINVAL;1188 }1189}1190 1191int fmc_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)1192{1193 switch (fmdev->curr_fmmode) {1194 case FM_MODE_RX:1195 return fm_rx_set_rds_mode(fmdev, rds_en_dis);1196 1197 case FM_MODE_TX:1198 return fm_tx_set_rds_mode(fmdev, rds_en_dis);1199 1200 default:1201 return -EINVAL;1202 }1203}1204 1205/* Sends power off command to the chip */1206static int fm_power_down(struct fmdev *fmdev)1207{1208 u16 payload;1209 int ret;1210 1211 if (!test_bit(FM_CORE_READY, &fmdev->flag)) {1212 fmerr("FM core is not ready\n");1213 return -EPERM;1214 }1215 if (fmdev->curr_fmmode == FM_MODE_OFF) {1216 fmdbg("FM chip is already in OFF state\n");1217 return 0;1218 }1219 1220 payload = 0x0;1221 ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,1222 sizeof(payload), NULL, NULL);1223 if (ret < 0)1224 return ret;1225 1226 return fmc_release(fmdev);1227}1228 1229/* Reads init command from FM firmware file and loads to the chip */1230static int fm_download_firmware(struct fmdev *fmdev, const u8 *fw_name)1231{1232 const struct firmware *fw_entry;1233 struct bts_header *fw_header;1234 struct bts_action *action;1235 struct bts_action_delay *delay;1236 u8 *fw_data;1237 int ret, fw_len;1238 1239 set_bit(FM_FW_DW_INPROGRESS, &fmdev->flag);1240 1241 ret = request_firmware(&fw_entry, fw_name,1242 &fmdev->radio_dev->dev);1243 if (ret < 0) {1244 fmerr("Unable to read firmware(%s) content\n", fw_name);1245 return ret;1246 }1247 fmdbg("Firmware(%s) length : %zu bytes\n", fw_name, fw_entry->size);1248 1249 fw_data = (void *)fw_entry->data;1250 fw_len = fw_entry->size;1251 1252 fw_header = (struct bts_header *)fw_data;1253 if (fw_header->magic != FM_FW_FILE_HEADER_MAGIC) {1254 fmerr("%s not a legal TI firmware file\n", fw_name);1255 ret = -EINVAL;1256 goto rel_fw;1257 }1258 fmdbg("FW(%s) magic number : 0x%x\n", fw_name, fw_header->magic);1259 1260 /* Skip file header info , we already verified it */1261 fw_data += sizeof(struct bts_header);1262 fw_len -= sizeof(struct bts_header);1263 1264 while (fw_data && fw_len > 0) {1265 action = (struct bts_action *)fw_data;1266 1267 switch (action->type) {1268 case ACTION_SEND_COMMAND: /* Send */1269 ret = fmc_send_cmd(fmdev, 0, 0, action->data,1270 action->size, NULL, NULL);1271 if (ret)1272 goto rel_fw;1273 1274 break;1275 1276 case ACTION_DELAY: /* Delay */1277 delay = (struct bts_action_delay *)action->data;1278 mdelay(delay->msec);1279 break;1280 }1281 1282 fw_data += (sizeof(struct bts_action) + (action->size));1283 fw_len -= (sizeof(struct bts_action) + (action->size));1284 }1285 fmdbg("Transferred only %d of %d bytes of the firmware to chip\n",1286 fw_entry->size - fw_len, fw_entry->size);1287rel_fw:1288 release_firmware(fw_entry);1289 clear_bit(FM_FW_DW_INPROGRESS, &fmdev->flag);1290 1291 return ret;1292}1293 1294/* Loads default RX configuration to the chip */1295static int load_default_rx_configuration(struct fmdev *fmdev)1296{1297 int ret;1298 1299 ret = fm_rx_set_volume(fmdev, FM_DEFAULT_RX_VOLUME);1300 if (ret < 0)1301 return ret;1302 1303 return fm_rx_set_rssi_threshold(fmdev, FM_DEFAULT_RSSI_THRESHOLD);1304}1305 1306/* Does FM power on sequence */1307static int fm_power_up(struct fmdev *fmdev, u8 mode)1308{1309 u16 payload;1310 __be16 asic_id = 0, asic_ver = 0;1311 int resp_len, ret;1312 u8 fw_name[50];1313 1314 if (mode >= FM_MODE_ENTRY_MAX) {1315 fmerr("Invalid firmware download option\n");1316 return -EINVAL;1317 }1318 1319 /*1320 * Initialize FM common module. FM GPIO toggling is1321 * taken care in Shared Transport driver.1322 */1323 ret = fmc_prepare(fmdev);1324 if (ret < 0) {1325 fmerr("Unable to prepare FM Common\n");1326 return ret;1327 }1328 1329 payload = FM_ENABLE;1330 if (fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,1331 sizeof(payload), NULL, NULL))1332 goto rel;1333 1334 /* Allow the chip to settle down in Channel-8 mode */1335 msleep(20);1336 1337 if (fmc_send_cmd(fmdev, ASIC_ID_GET, REG_RD, NULL,1338 sizeof(asic_id), &asic_id, &resp_len))1339 goto rel;1340 1341 if (fmc_send_cmd(fmdev, ASIC_VER_GET, REG_RD, NULL,1342 sizeof(asic_ver), &asic_ver, &resp_len))1343 goto rel;1344 1345 fmdbg("ASIC ID: 0x%x , ASIC Version: %d\n",1346 be16_to_cpu(asic_id), be16_to_cpu(asic_ver));1347 1348 sprintf(fw_name, "%s_%x.%d.bts", FM_FMC_FW_FILE_START,1349 be16_to_cpu(asic_id), be16_to_cpu(asic_ver));1350 1351 ret = fm_download_firmware(fmdev, fw_name);1352 if (ret < 0) {1353 fmdbg("Failed to download firmware file %s\n", fw_name);1354 goto rel;1355 }1356 sprintf(fw_name, "%s_%x.%d.bts", (mode == FM_MODE_RX) ?1357 FM_RX_FW_FILE_START : FM_TX_FW_FILE_START,1358 be16_to_cpu(asic_id), be16_to_cpu(asic_ver));1359 1360 ret = fm_download_firmware(fmdev, fw_name);1361 if (ret < 0) {1362 fmdbg("Failed to download firmware file %s\n", fw_name);1363 goto rel;1364 } else1365 return ret;1366rel:1367 return fmc_release(fmdev);1368}1369 1370/* Set FM Modes(TX, RX, OFF) */1371int fmc_set_mode(struct fmdev *fmdev, u8 fm_mode)1372{1373 int ret = 0;1374 1375 if (fm_mode >= FM_MODE_ENTRY_MAX) {1376 fmerr("Invalid FM mode\n");1377 return -EINVAL;1378 }1379 if (fmdev->curr_fmmode == fm_mode) {1380 fmdbg("Already fm is in mode(%d)\n", fm_mode);1381 return ret;1382 }1383 1384 switch (fm_mode) {1385 case FM_MODE_OFF: /* OFF Mode */1386 ret = fm_power_down(fmdev);1387 if (ret < 0) {1388 fmerr("Failed to set OFF mode\n");1389 return ret;1390 }1391 break;1392 1393 case FM_MODE_TX: /* TX Mode */1394 case FM_MODE_RX: /* RX Mode */1395 /* Power down before switching to TX or RX mode */1396 if (fmdev->curr_fmmode != FM_MODE_OFF) {1397 ret = fm_power_down(fmdev);1398 if (ret < 0) {1399 fmerr("Failed to set OFF mode\n");1400 return ret;1401 }1402 msleep(30);1403 }1404 ret = fm_power_up(fmdev, fm_mode);1405 if (ret < 0) {1406 fmerr("Failed to load firmware\n");1407 return ret;1408 }1409 }1410 fmdev->curr_fmmode = fm_mode;1411 1412 /* Set default configuration */1413 if (fmdev->curr_fmmode == FM_MODE_RX) {1414 fmdbg("Loading default rx configuration..\n");1415 ret = load_default_rx_configuration(fmdev);1416 if (ret < 0)1417 fmerr("Failed to load default values\n");1418 }1419 1420 return ret;1421}1422 1423/* Returns current FM mode (TX, RX, OFF) */1424int fmc_get_mode(struct fmdev *fmdev, u8 *fmmode)1425{1426 if (!test_bit(FM_CORE_READY, &fmdev->flag)) {1427 fmerr("FM core is not ready\n");1428 return -EPERM;1429 }1430 if (fmmode == NULL) {1431 fmerr("Invalid memory\n");1432 return -ENOMEM;1433 }1434 1435 *fmmode = fmdev->curr_fmmode;1436 return 0;1437}1438 1439/* Called by ST layer when FM packet is available */1440static long fm_st_receive(void *arg, struct sk_buff *skb)1441{1442 struct fmdev *fmdev;1443 1444 fmdev = arg;1445 1446 if (skb == NULL) {1447 fmerr("Invalid SKB received from ST\n");1448 return -EFAULT;1449 }1450 1451 if (skb->cb[0] != FM_PKT_LOGICAL_CHAN_NUMBER) {1452 fmerr("Received SKB (%p) is not FM Channel 8 pkt\n", skb);1453 return -EINVAL;1454 }1455 1456 memcpy(skb_push(skb, 1), &skb->cb[0], 1);1457 skb_queue_tail(&fmdev->rx_q, skb);1458 queue_work(system_bh_wq, &fmdev->rx_bh_work);1459 1460 return 0;1461}1462 1463/*1464 * Called by ST layer to indicate protocol registration completion1465 * status.1466 */1467static void fm_st_reg_comp_cb(void *arg, int data)1468{1469 struct fmdev *fmdev;1470 1471 fmdev = (struct fmdev *)arg;1472 fmdev->streg_cbdata = data;1473 complete(&wait_for_fmdrv_reg_comp);1474}1475 1476/*1477 * This function will be called from FM V4L2 open function.1478 * Register with ST driver and initialize driver data.1479 */1480int fmc_prepare(struct fmdev *fmdev)1481{1482 static struct st_proto_s fm_st_proto;1483 int ret;1484 1485 if (test_bit(FM_CORE_READY, &fmdev->flag)) {1486 fmdbg("FM Core is already up\n");1487 return 0;1488 }1489 1490 memset(&fm_st_proto, 0, sizeof(fm_st_proto));1491 fm_st_proto.recv = fm_st_receive;1492 fm_st_proto.match_packet = NULL;1493 fm_st_proto.reg_complete_cb = fm_st_reg_comp_cb;1494 fm_st_proto.write = NULL; /* TI ST driver will fill write pointer */1495 fm_st_proto.priv_data = fmdev;1496 fm_st_proto.chnl_id = 0x08;1497 fm_st_proto.max_frame_size = 0xff;1498 fm_st_proto.hdr_len = 1;1499 fm_st_proto.offset_len_in_hdr = 0;1500 fm_st_proto.len_size = 1;1501 fm_st_proto.reserve = 1;1502 1503 ret = st_register(&fm_st_proto);1504 if (ret == -EINPROGRESS) {1505 init_completion(&wait_for_fmdrv_reg_comp);1506 fmdev->streg_cbdata = -EINPROGRESS;1507 fmdbg("%s waiting for ST reg completion signal\n", __func__);1508 1509 if (!wait_for_completion_timeout(&wait_for_fmdrv_reg_comp,1510 FM_ST_REG_TIMEOUT)) {1511 fmerr("Timeout(%d sec), didn't get reg completion signal from ST\n",1512 jiffies_to_msecs(FM_ST_REG_TIMEOUT) / 1000);1513 return -ETIMEDOUT;1514 }1515 if (fmdev->streg_cbdata != 0) {1516 fmerr("ST reg comp CB called with error status %d\n",1517 fmdev->streg_cbdata);1518 return -EAGAIN;1519 }1520 1521 ret = 0;1522 } else if (ret < 0) {1523 fmerr("st_register failed %d\n", ret);1524 return -EAGAIN;1525 }1526 1527 if (fm_st_proto.write != NULL) {1528 g_st_write = fm_st_proto.write;1529 } else {1530 fmerr("Failed to get ST write func pointer\n");1531 ret = st_unregister(&fm_st_proto);1532 if (ret < 0)1533 fmerr("st_unregister failed %d\n", ret);1534 return -EAGAIN;1535 }1536 1537 spin_lock_init(&fmdev->rds_buff_lock);1538 spin_lock_init(&fmdev->resp_skb_lock);1539 1540 /* Initialize TX queue and TX bh work */1541 skb_queue_head_init(&fmdev->tx_q);1542 INIT_WORK(&fmdev->tx_bh_work, send_bh_work);1543 1544 /* Initialize RX Queue and RX bh work */1545 skb_queue_head_init(&fmdev->rx_q);1546 INIT_WORK(&fmdev->rx_bh_work, recv_bh_work);1547 1548 fmdev->irq_info.stage = 0;1549 atomic_set(&fmdev->tx_cnt, 1);1550 fmdev->resp_comp = NULL;1551 1552 timer_setup(&fmdev->irq_info.timer, int_timeout_handler, 0);1553 /*TODO: add FM_STIC_EVENT later */1554 fmdev->irq_info.mask = FM_MAL_EVENT;1555 1556 /* Region info */1557 fmdev->rx.region = region_configs[default_radio_region];1558 1559 fmdev->rx.mute_mode = FM_MUTE_OFF;1560 fmdev->rx.rf_depend_mute = FM_RX_RF_DEPENDENT_MUTE_OFF;1561 fmdev->rx.rds.flag = FM_RDS_DISABLE;1562 fmdev->rx.freq = FM_UNDEFINED_FREQ;1563 fmdev->rx.rds_mode = FM_RDS_SYSTEM_RDS;1564 fmdev->rx.af_mode = FM_RX_RDS_AF_SWITCH_MODE_OFF;1565 fmdev->irq_info.retry = 0;1566 1567 fm_rx_reset_rds_cache(fmdev);1568 init_waitqueue_head(&fmdev->rx.rds.read_queue);1569 1570 fm_rx_reset_station_info(fmdev);1571 set_bit(FM_CORE_READY, &fmdev->flag);1572 1573 return ret;1574}1575 1576/*1577 * This function will be called from FM V4L2 release function.1578 * Unregister from ST driver.1579 */1580int fmc_release(struct fmdev *fmdev)1581{1582 static struct st_proto_s fm_st_proto;1583 int ret;1584 1585 if (!test_bit(FM_CORE_READY, &fmdev->flag)) {1586 fmdbg("FM Core is already down\n");1587 return 0;1588 }1589 /* Service pending read */1590 wake_up_interruptible(&fmdev->rx.rds.read_queue);1591 1592 cancel_work_sync(&fmdev->tx_bh_work);1593 cancel_work_sync(&fmdev->rx_bh_work);1594 1595 skb_queue_purge(&fmdev->tx_q);1596 skb_queue_purge(&fmdev->rx_q);1597 1598 fmdev->resp_comp = NULL;1599 fmdev->rx.freq = 0;1600 1601 memset(&fm_st_proto, 0, sizeof(fm_st_proto));1602 fm_st_proto.chnl_id = 0x08;1603 1604 ret = st_unregister(&fm_st_proto);1605 1606 if (ret < 0)1607 fmerr("Failed to de-register FM from ST %d\n", ret);1608 else1609 fmdbg("Successfully unregistered from ST\n");1610 1611 clear_bit(FM_CORE_READY, &fmdev->flag);1612 return ret;1613}1614 1615/*1616 * Module init function. Ask FM V4L module to register video device.1617 * Allocate memory for FM driver context and RX RDS buffer.1618 */1619static int __init fm_drv_init(void)1620{1621 struct fmdev *fmdev = NULL;1622 int ret = -ENOMEM;1623 1624 fmdbg("FM driver version %s\n", FM_DRV_VERSION);1625 1626 fmdev = kzalloc(sizeof(struct fmdev), GFP_KERNEL);1627 if (NULL == fmdev) {1628 fmerr("Can't allocate operation structure memory\n");1629 return ret;1630 }1631 fmdev->rx.rds.buf_size = default_rds_buf * FM_RDS_BLK_SIZE;1632 fmdev->rx.rds.buff = kzalloc(fmdev->rx.rds.buf_size, GFP_KERNEL);1633 if (NULL == fmdev->rx.rds.buff) {1634 fmerr("Can't allocate rds ring buffer\n");1635 goto rel_dev;1636 }1637 1638 ret = fm_v4l2_init_video_device(fmdev, radio_nr);1639 if (ret < 0)1640 goto rel_rdsbuf;1641 1642 fmdev->irq_info.handlers = int_handler_table;1643 fmdev->curr_fmmode = FM_MODE_OFF;1644 fmdev->tx_data.pwr_lvl = FM_PWR_LVL_DEF;1645 fmdev->tx_data.preemph = FM_TX_PREEMPH_50US;1646 return ret;1647 1648rel_rdsbuf:1649 kfree(fmdev->rx.rds.buff);1650rel_dev:1651 kfree(fmdev);1652 1653 return ret;1654}1655 1656/* Module exit function. Ask FM V4L module to unregister video device */1657static void __exit fm_drv_exit(void)1658{1659 struct fmdev *fmdev = NULL;1660 1661 fmdev = fm_v4l2_deinit_video_device();1662 if (fmdev != NULL) {1663 kfree(fmdev->rx.rds.buff);1664 kfree(fmdev);1665 }1666}1667 1668module_init(fm_drv_init);1669module_exit(fm_drv_exit);1670 1671/* ------------- Module Info ------------- */1672MODULE_AUTHOR("Manjunatha Halli <manjunatha_halli@ti.com>");1673MODULE_DESCRIPTION("FM Driver for TI's Connectivity chip. " FM_DRV_VERSION);1674MODULE_VERSION(FM_DRV_VERSION);1675MODULE_LICENSE("GPL");1676