| 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(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 | 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 | *(u16 *)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(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 byte1; |
| 693 | u8 index = 0; |
| 694 | u8 *rds_buff; |
| 695 | |
| 696 | /* |
| 697 | * Since in Orca the 2 RDS Data bytes are in little endian and |
| 698 | * in Dolphin they are in big endian, the parsing of the RDS data |
| 699 | * is chip dependent |
| 700 | */ |
| 701 | if (fmdev->asci_id != 0x6350) { |
| 702 | rds_buff = &rds_format->data.groupdatabuff.buff[0]; |
| 703 | while (index + 1 < FM_RX_RDS_INFO_FIELD_MAX) { |
| 704 | byte1 = rds_buff[index]; |
| 705 | rds_buff[index] = rds_buff[index + 1]; |
| 706 | rds_buff[index + 1] = byte1; |
| 707 | index += 2; |
| 708 | } |
| 709 | } |
| 710 | } |
| 711 | |
| 712 | static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *fmdev) |
| 713 | { |
| 714 | struct sk_buff *skb; |
| 715 | struct fm_rdsdata_format rds_fmt; |
| 716 | struct fm_rds *rds = &fmdev->rx.rds; |
| 717 | unsigned long group_idx, flags; |
| 718 | u8 *rds_data, meta_data, tmpbuf[3]; |
| 719 | u8 type, blk_idx; |
| 720 | u16 cur_picode; |
| 721 | u32 rds_len; |
| 722 | |
| 723 | if (check_cmdresp_status(fmdev, &skb)) |
| 724 | return; |
| 725 | |
| 726 | /* Skip header info */ |
| 727 | skb_pull(skb, sizeof(struct fm_event_msg_hdr)); |
| 728 | rds_data = skb->data; |
| 729 | rds_len = skb->len; |
| 730 | |
| 731 | /* Parse the RDS data */ |
| 732 | while (rds_len >= FM_RDS_BLK_SIZE) { |
| 733 | meta_data = rds_data[2]; |
| 734 | /* Get the type: 0=A, 1=B, 2=C, 3=C', 4=D, 5=E */ |
| 735 | type = (meta_data & 0x07); |
| 736 | |
| 737 | /* Transform the blk type into index sequence (0, 1, 2, 3, 4) */ |
| 738 | blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1)); |
| 739 | fmdbg("Block index:%d(%s)\n", blk_idx, |
| 740 | (meta_data & FM_RDS_STATUS_ERR_MASK) ? "Bad" : "Ok"); |
| 741 | |
| 742 | if ((meta_data & FM_RDS_STATUS_ERR_MASK) != 0) |
| 743 | break; |
| 744 | |
| 745 | if (blk_idx > FM_RDS_BLK_IDX_D) { |
| 746 | fmdbg("Block sequence mismatch\n"); |
| 747 | rds->last_blk_idx = -1; |
| 748 | break; |
| 749 | } |
| 750 | |
| 751 | /* Skip checkword (control) byte and copy only data byte */ |
| 752 | memcpy(&rds_fmt.data.groupdatabuff. |
| 753 | buff[blk_idx * (FM_RDS_BLK_SIZE - 1)], |
| 754 | rds_data, (FM_RDS_BLK_SIZE - 1)); |
| 755 | |
| 756 | rds->last_blk_idx = blk_idx; |
| 757 | |
| 758 | /* If completed a whole group then handle it */ |
| 759 | if (blk_idx == FM_RDS_BLK_IDX_D) { |
| 760 | fmdbg("Good block received\n"); |
| 761 | fm_rdsparse_swapbytes(fmdev, &rds_fmt); |
| 762 | |
| 763 | /* |
| 764 | * Extract PI code and store in local cache. |
| 765 | * We need this during AF switch processing. |
| 766 | */ |
| 767 | cur_picode = be16_to_cpu(rds_fmt.data.groupgeneral.pidata); |
| 768 | if (fmdev->rx.stat_info.picode != cur_picode) |
| 769 | fmdev->rx.stat_info.picode = cur_picode; |
| 770 | |
| 771 | fmdbg("picode:%d\n", cur_picode); |
| 772 | |
| 773 | group_idx = (rds_fmt.data.groupgeneral.blk_b[0] >> 3); |
| 774 | fmdbg("(fmdrv):Group:%ld%s\n", group_idx/2, |
| 775 | (group_idx % 2) ? "B" : "A"); |
| 776 | |
| 777 | group_idx = 1 << (rds_fmt.data.groupgeneral.blk_b[0] >> 3); |
| 778 | if (group_idx == FM_RDS_GROUP_TYPE_MASK_0A) { |
| 779 | fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[0]); |
| 780 | fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[1]); |
| 781 | } |
| 782 | } |
| 783 | rds_len -= FM_RDS_BLK_SIZE; |
| 784 | rds_data += FM_RDS_BLK_SIZE; |
| 785 | } |
| 786 | |
| 787 | /* Copy raw rds data to internal rds buffer */ |
| 788 | rds_data = skb->data; |
| 789 | rds_len = skb->len; |
| 790 | |
| 791 | spin_lock_irqsave(&fmdev->rds_buff_lock, flags); |
| 792 | while (rds_len > 0) { |
| 793 | /* |
| 794 | * Fill RDS buffer as per V4L2 specification. |
| 795 | * Store control byte |
| 796 | */ |
| 797 | type = (rds_data[2] & 0x07); |
| 798 | blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1)); |
| 799 | tmpbuf[2] = blk_idx; /* Offset name */ |
| 800 | tmpbuf[2] |= blk_idx << 3; /* Received offset */ |
| 801 | |
| 802 | /* Store data byte */ |
| 803 | tmpbuf[0] = rds_data[0]; |
| 804 | tmpbuf[1] = rds_data[1]; |
| 805 | |
| 806 | memcpy(&rds->buff[rds->wr_idx], &tmpbuf, FM_RDS_BLK_SIZE); |
| 807 | rds->wr_idx = (rds->wr_idx + FM_RDS_BLK_SIZE) % rds->buf_size; |
| 808 | |
| 809 | /* Check for overflow & start over */ |
| 810 | if (rds->wr_idx == rds->rd_idx) { |
| 811 | fmdbg("RDS buffer overflow\n"); |
| 812 | rds->wr_idx = 0; |
| 813 | rds->rd_idx = 0; |
| 814 | break; |
| 815 | } |
| 816 | rds_len -= FM_RDS_BLK_SIZE; |
| 817 | rds_data += FM_RDS_BLK_SIZE; |
| 818 | } |
| 819 | spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); |
| 820 | |
| 821 | /* Wakeup read queue */ |
| 822 | if (rds->wr_idx != rds->rd_idx) |
| 823 | wake_up_interruptible(&rds->read_queue); |
| 824 | |
| 825 | fm_irq_call_stage(fmdev, FM_RDS_FINISH_IDX); |
| 826 | } |
| 827 | |
| 828 | static void fm_irq_handle_rds_finish(struct fmdev *fmdev) |
| 829 | { |
| 830 | fm_irq_call_stage(fmdev, FM_HW_TUNE_OP_ENDED_IDX); |
| 831 | } |
| 832 | |
| 833 | static void fm_irq_handle_tune_op_ended(struct fmdev *fmdev) |
| 834 | { |
| 835 | if (fmdev->irq_info.flag & (FM_FR_EVENT | FM_BL_EVENT) & fmdev-> |
| 836 | irq_info.mask) { |
| 837 | fmdbg("irq: tune ended/bandlimit reached\n"); |
| 838 | if (test_and_clear_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag)) { |
| 839 | fmdev->irq_info.stage = FM_AF_JUMP_RD_FREQ_IDX; |
| 840 | } else { |
| 841 | complete(&fmdev->maintask_comp); |
| 842 | fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX; |
| 843 | } |
| 844 | } else |
| 845 | fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX; |
| 846 | |
| 847 | fm_irq_call(fmdev); |
| 848 | } |
| 849 | |
| 850 | static void fm_irq_handle_power_enb(struct fmdev *fmdev) |
| 851 | { |
| 852 | if (fmdev->irq_info.flag & FM_POW_ENB_EVENT) { |
| 853 | fmdbg("irq: Power Enabled/Disabled\n"); |
| 854 | complete(&fmdev->maintask_comp); |
| 855 | } |
| 856 | |
| 857 | fm_irq_call_stage(fmdev, FM_LOW_RSSI_START_IDX); |
| 858 | } |
| 859 | |
| 860 | static void fm_irq_handle_low_rssi_start(struct fmdev *fmdev) |
| 861 | { |
| 862 | if ((fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) && |
| 863 | (fmdev->irq_info.flag & FM_LEV_EVENT & fmdev->irq_info.mask) && |
| 864 | (fmdev->rx.freq != FM_UNDEFINED_FREQ) && |
| 865 | (fmdev->rx.stat_info.afcache_size != 0)) { |
| 866 | fmdbg("irq: rssi level has fallen below threshold level\n"); |
| 867 | |
| 868 | /* Disable further low RSSI interrupts */ |
| 869 | fmdev->irq_info.mask &= ~FM_LEV_EVENT; |
| 870 | |
| 871 | fmdev->rx.afjump_idx = 0; |
| 872 | fmdev->rx.freq_before_jump = fmdev->rx.freq; |
| 873 | fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX; |
| 874 | } else { |
| 875 | /* Continue next function in interrupt handler table */ |
| 876 | fmdev->irq_info.stage = FM_SEND_INTMSK_CMD_IDX; |
| 877 | } |
| 878 | |
| 879 | fm_irq_call(fmdev); |
| 880 | } |
| 881 | |
| 882 | static void fm_irq_afjump_set_pi(struct fmdev *fmdev) |
| 883 | { |
| 884 | u16 payload; |
| 885 | |
| 886 | /* Set PI code - must be updated if the AF list is not empty */ |
| 887 | payload = fmdev->rx.stat_info.picode; |
| 888 | if (!fm_send_cmd(fmdev, RDS_PI_SET, REG_WR, &payload, sizeof(payload), NULL)) |
| 889 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_RESP_IDX); |
| 890 | } |
| 891 | |
| 892 | static void fm_irq_handle_set_pi_resp(struct fmdev *fmdev) |
| 893 | { |
| 894 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SETPI_MASK_IDX); |
| 895 | } |
| 896 | |
| 897 | /* |
| 898 | * Set PI mask. |
| 899 | * 0xFFFF = Enable PI code matching |
| 900 | * 0x0000 = Disable PI code matching |
| 901 | */ |
| 902 | static void fm_irq_afjump_set_pimask(struct fmdev *fmdev) |
| 903 | { |
| 904 | u16 payload; |
| 905 | |
| 906 | payload = 0x0000; |
| 907 | if (!fm_send_cmd(fmdev, RDS_PI_MASK_SET, REG_WR, &payload, sizeof(payload), NULL)) |
| 908 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX); |
| 909 | } |
| 910 | |
| 911 | static void fm_irq_handle_set_pimask_resp(struct fmdev *fmdev) |
| 912 | { |
| 913 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SET_AF_FREQ_IDX); |
| 914 | } |
| 915 | |
| 916 | static void fm_irq_afjump_setfreq(struct fmdev *fmdev) |
| 917 | { |
| 918 | u16 frq_index; |
| 919 | u16 payload; |
| 920 | |
| 921 | fmdbg("Swtich to %d KHz\n", fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]); |
| 922 | frq_index = (fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx] - |
| 923 | fmdev->rx.region.bot_freq) / FM_FREQ_MUL; |
| 924 | |
| 925 | payload = frq_index; |
| 926 | if (!fm_send_cmd(fmdev, AF_FREQ_SET, REG_WR, &payload, sizeof(payload), NULL)) |
| 927 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX); |
| 928 | } |
| 929 | |
| 930 | static void fm_irq_handle_setfreq_resp(struct fmdev *fmdev) |
| 931 | { |
| 932 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_ENABLE_INT_IDX); |
| 933 | } |
| 934 | |
| 935 | static void fm_irq_afjump_enableint(struct fmdev *fmdev) |
| 936 | { |
| 937 | u16 payload; |
| 938 | |
| 939 | /* Enable FR (tuning operation ended) interrupt */ |
| 940 | payload = FM_FR_EVENT; |
| 941 | if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, sizeof(payload), NULL)) |
| 942 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_ENABLE_INT_RESP_IDX); |
| 943 | } |
| 944 | |
| 945 | static void fm_irq_afjump_enableint_resp(struct fmdev *fmdev) |
| 946 | { |
| 947 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_START_AFJUMP_IDX); |
| 948 | } |
| 949 | |
| 950 | static void fm_irq_start_afjump(struct fmdev *fmdev) |
| 951 | { |
| 952 | u16 payload; |
| 953 | |
| 954 | payload = FM_TUNER_AF_JUMP_MODE; |
| 955 | if (!fm_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload, |
| 956 | sizeof(payload), NULL)) |
| 957 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX); |
| 958 | } |
| 959 | |
| 960 | static void fm_irq_handle_start_afjump_resp(struct fmdev *fmdev) |
| 961 | { |
| 962 | struct sk_buff *skb; |
| 963 | |
| 964 | if (check_cmdresp_status(fmdev, &skb)) |
| 965 | return; |
| 966 | |
| 967 | fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX; |
| 968 | set_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag); |
| 969 | clear_bit(FM_INTTASK_RUNNING, &fmdev->flag); |
| 970 | } |
| 971 | |
| 972 | static void fm_irq_afjump_rd_freq(struct fmdev *fmdev) |
| 973 | { |
| 974 | u16 payload; |
| 975 | |
| 976 | if (!fm_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, sizeof(payload), NULL)) |
| 977 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_RD_FREQ_RESP_IDX); |
| 978 | } |
| 979 | |
| 980 | static void fm_irq_afjump_rd_freq_resp(struct fmdev *fmdev) |
| 981 | { |
| 982 | struct sk_buff *skb; |
| 983 | u16 read_freq; |
| 984 | u32 curr_freq, jumped_freq; |
| 985 | |
| 986 | if (check_cmdresp_status(fmdev, &skb)) |
| 987 | return; |
| 988 | |
| 989 | /* Skip header info and copy only response data */ |
| 990 | skb_pull(skb, sizeof(struct fm_event_msg_hdr)); |
| 991 | memcpy(&read_freq, skb->data, sizeof(read_freq)); |
| 992 | read_freq = be16_to_cpu(read_freq); |
| 993 | curr_freq = fmdev->rx.region.bot_freq + ((u32)read_freq * FM_FREQ_MUL); |
| 994 | |
| 995 | jumped_freq = fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]; |
| 996 | |
| 997 | /* If the frequency was changed the jump succeeded */ |
| 998 | if ((curr_freq != fmdev->rx.freq_before_jump) && (curr_freq == jumped_freq)) { |
| 999 | fmdbg("Successfully switched to alternate freq %d\n", curr_freq); |
| 1000 | fmdev->rx.freq = curr_freq; |
| 1001 | fm_rx_reset_rds_cache(fmdev); |
| 1002 | |
| 1003 | /* AF feature is on, enable low level RSSI interrupt */ |
| 1004 | if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) |
| 1005 | fmdev->irq_info.mask |= FM_LEV_EVENT; |
| 1006 | |
| 1007 | fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX; |
| 1008 | } else { /* jump to the next freq in the AF list */ |
| 1009 | fmdev->rx.afjump_idx++; |
| 1010 | |
| 1011 | /* If we reached the end of the list - stop searching */ |
| 1012 | if (fmdev->rx.afjump_idx >= fmdev->rx.stat_info.afcache_size) { |
| 1013 | fmdbg("AF switch processing failed\n"); |
| 1014 | fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX; |
| 1015 | } else { /* AF List is not over - try next one */ |
| 1016 | |
| 1017 | fmdbg("Trying next freq in AF cache\n"); |
| 1018 | fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX; |
| 1019 | } |
| 1020 | } |
| 1021 | fm_irq_call(fmdev); |
| 1022 | } |
| 1023 | |
| 1024 | static void fm_irq_handle_low_rssi_finish(struct fmdev *fmdev) |
| 1025 | { |
| 1026 | fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX); |
| 1027 | } |
| 1028 | |
| 1029 | static void fm_irq_send_intmsk_cmd(struct fmdev *fmdev) |
| 1030 | { |
| 1031 | u16 payload; |
| 1032 | |
| 1033 | /* Re-enable FM interrupts */ |
| 1034 | payload = fmdev->irq_info.mask; |
| 1035 | |
| 1036 | if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, |
| 1037 | sizeof(payload), NULL)) |
| 1038 | fm_irq_timeout_stage(fmdev, FM_HANDLE_INTMSK_CMD_RESP_IDX); |
| 1039 | } |
| 1040 | |
| 1041 | static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *fmdev) |
| 1042 | { |
| 1043 | struct sk_buff *skb; |
| 1044 | |
| 1045 | if (check_cmdresp_status(fmdev, &skb)) |
| 1046 | return; |
| 1047 | /* |
| 1048 | * This is last function in interrupt table to be executed. |
| 1049 | * So, reset stage index to 0. |
| 1050 | */ |
| 1051 | fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX; |
| 1052 | |
| 1053 | /* Start processing any pending interrupt */ |
| 1054 | if (test_and_clear_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag)) |
| 1055 | fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev); |
| 1056 | else |
| 1057 | clear_bit(FM_INTTASK_RUNNING, &fmdev->flag); |
| 1058 | } |
| 1059 | |
| 1060 | /* Returns availability of RDS data in internel buffer */ |
| 1061 | int fmc_is_rds_data_available(struct fmdev *fmdev, struct file *file, |
| 1062 | struct poll_table_struct *pts) |
| 1063 | { |
| 1064 | poll_wait(file, &fmdev->rx.rds.read_queue, pts); |
| 1065 | if (fmdev->rx.rds.rd_idx != fmdev->rx.rds.wr_idx) |
| 1066 | return 0; |
| 1067 | |
| 1068 | return -EAGAIN; |
| 1069 | } |
| 1070 | |
| 1071 | /* Copies RDS data from internal buffer to user buffer */ |
| 1072 | int fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file, |
| 1073 | u8 __user *buf, size_t count) |
| 1074 | { |
| 1075 | u32 block_count; |
| 1076 | unsigned long flags; |
| 1077 | int ret; |
| 1078 | |
| 1079 | if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) { |
| 1080 | if (file->f_flags & O_NONBLOCK) |
| 1081 | return -EWOULDBLOCK; |
| 1082 | |
| 1083 | ret = wait_event_interruptible(fmdev->rx.rds.read_queue, |
| 1084 | (fmdev->rx.rds.wr_idx != fmdev->rx.rds.rd_idx)); |
| 1085 | if (ret) |
| 1086 | return -EINTR; |
| 1087 | } |
| 1088 | |
| 1089 | /* Calculate block count from byte count */ |
| 1090 | count /= 3; |
| 1091 | block_count = 0; |
| 1092 | ret = 0; |
| 1093 | |
| 1094 | spin_lock_irqsave(&fmdev->rds_buff_lock, flags); |
| 1095 | |
| 1096 | while (block_count < count) { |
| 1097 | if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) |
| 1098 | break; |
| 1099 | |
| 1100 | if (copy_to_user(buf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx], |
| 1101 | FM_RDS_BLK_SIZE)) |
| 1102 | break; |
| 1103 | |
| 1104 | fmdev->rx.rds.rd_idx += FM_RDS_BLK_SIZE; |
| 1105 | if (fmdev->rx.rds.rd_idx >= fmdev->rx.rds.buf_size) |
| 1106 | fmdev->rx.rds.rd_idx = 0; |
| 1107 | |
| 1108 | block_count++; |
| 1109 | buf += FM_RDS_BLK_SIZE; |
| 1110 | ret += FM_RDS_BLK_SIZE; |
| 1111 | } |
| 1112 | spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); |
| 1113 | return ret; |
| 1114 | } |
| 1115 | |
| 1116 | int fmc_set_freq(struct fmdev *fmdev, u32 freq_to_set) |
| 1117 | { |
| 1118 | switch (fmdev->curr_fmmode) { |
| 1119 | case FM_MODE_RX: |
| 1120 | return fm_rx_set_freq(fmdev, freq_to_set); |
| 1121 | |
| 1122 | case FM_MODE_TX: |
| 1123 | return fm_tx_set_freq(fmdev, freq_to_set); |
| 1124 | |
| 1125 | default: |
| 1126 | return -EINVAL; |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | int fmc_get_freq(struct fmdev *fmdev, u32 *cur_tuned_frq) |
| 1131 | { |
| 1132 | if (fmdev->rx.freq == FM_UNDEFINED_FREQ) { |
| 1133 | fmerr("RX frequency is not set\n"); |
| 1134 | return -EPERM; |
| 1135 | } |
| 1136 | if (cur_tuned_frq == NULL) { |
| 1137 | fmerr("Invalid memory\n"); |
| 1138 | return -ENOMEM; |
| 1139 | } |
| 1140 | |
| 1141 | switch (fmdev->curr_fmmode) { |
| 1142 | case FM_MODE_RX: |
| 1143 | *cur_tuned_frq = fmdev->rx.freq; |
| 1144 | return 0; |
| 1145 | |
| 1146 | case FM_MODE_TX: |
| 1147 | *cur_tuned_frq = 0; /* TODO : Change this later */ |
| 1148 | return 0; |
| 1149 | |
| 1150 | default: |
| 1151 | return -EINVAL; |
| 1152 | } |
| 1153 | |
| 1154 | } |
| 1155 | |
| 1156 | int fmc_set_region(struct fmdev *fmdev, u8 region_to_set) |
| 1157 | { |
| 1158 | switch (fmdev->curr_fmmode) { |
| 1159 | case FM_MODE_RX: |
| 1160 | return fm_rx_set_region(fmdev, region_to_set); |
| 1161 | |
| 1162 | case FM_MODE_TX: |
| 1163 | return fm_tx_set_region(fmdev, region_to_set); |
| 1164 | |
| 1165 | default: |
| 1166 | return -EINVAL; |
| 1167 | } |
| 1168 | } |
| 1169 | |
| 1170 | int fmc_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset) |
| 1171 | { |
| 1172 | switch (fmdev->curr_fmmode) { |
| 1173 | case FM_MODE_RX: |
| 1174 | return fm_rx_set_mute_mode(fmdev, mute_mode_toset); |
| 1175 | |
| 1176 | case FM_MODE_TX: |
| 1177 | return fm_tx_set_mute_mode(fmdev, mute_mode_toset); |
| 1178 | |
| 1179 | default: |
| 1180 | return -EINVAL; |
| 1181 | } |
| 1182 | } |
| 1183 | |
| 1184 | int fmc_set_stereo_mono(struct fmdev *fmdev, u16 mode) |
| 1185 | { |
| 1186 | switch (fmdev->curr_fmmode) { |
| 1187 | case FM_MODE_RX: |
| 1188 | return fm_rx_set_stereo_mono(fmdev, mode); |
| 1189 | |
| 1190 | case FM_MODE_TX: |
| 1191 | return fm_tx_set_stereo_mono(fmdev, mode); |
| 1192 | |
| 1193 | default: |
| 1194 | return -EINVAL; |
| 1195 | } |
| 1196 | } |
| 1197 | |
| 1198 | int fmc_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis) |
| 1199 | { |
| 1200 | switch (fmdev->curr_fmmode) { |
| 1201 | case FM_MODE_RX: |
| 1202 | return fm_rx_set_rds_mode(fmdev, rds_en_dis); |
| 1203 | |
| 1204 | case FM_MODE_TX: |
| 1205 | return fm_tx_set_rds_mode(fmdev, rds_en_dis); |
| 1206 | |
| 1207 | default: |
| 1208 | return -EINVAL; |
| 1209 | } |
| 1210 | } |
| 1211 | |
| 1212 | /* Sends power off command to the chip */ |
| 1213 | static int fm_power_down(struct fmdev *fmdev) |
| 1214 | { |
| 1215 | u16 payload; |
| 1216 | int ret; |
| 1217 | |
| 1218 | if (!test_bit(FM_CORE_READY, &fmdev->flag)) { |
| 1219 | fmerr("FM core is not ready\n"); |
| 1220 | return -EPERM; |
| 1221 | } |
| 1222 | if (fmdev->curr_fmmode == FM_MODE_OFF) { |
| 1223 | fmdbg("FM chip is already in OFF state\n"); |
| 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | payload = 0x0; |
| 1228 | ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload, |
| 1229 | sizeof(payload), NULL, NULL); |
| 1230 | if (ret < 0) |
| 1231 | return ret; |
| 1232 | |
| 1233 | return fmc_release(fmdev); |
| 1234 | } |
| 1235 | |
| 1236 | /* Reads init command from FM firmware file and loads to the chip */ |
| 1237 | static int fm_download_firmware(struct fmdev *fmdev, const u8 *fw_name) |
| 1238 | { |
| 1239 | const struct firmware *fw_entry; |
| 1240 | struct bts_header *fw_header; |
| 1241 | struct bts_action *action; |
| 1242 | struct bts_action_delay *delay; |
| 1243 | u8 *fw_data; |
| 1244 | int ret, fw_len, cmd_cnt; |
| 1245 | |
| 1246 | cmd_cnt = 0; |
| 1247 | set_bit(FM_FW_DW_INPROGRESS, &fmdev->flag); |
| 1248 | |
| 1249 | ret = request_firmware(&fw_entry, fw_name, |
| 1250 | &fmdev->radio_dev->dev); |
| 1251 | if (ret < 0) { |
| 1252 | fmerr("Unable to read firmware(%s) content\n", fw_name); |
| 1253 | return ret; |
| 1254 | } |
| 1255 | fmdbg("Firmware(%s) length : %d bytes\n", fw_name, fw_entry->size); |
| 1256 | |
| 1257 | fw_data = (void *)fw_entry->data; |
| 1258 | fw_len = fw_entry->size; |
| 1259 | |
| 1260 | fw_header = (struct bts_header *)fw_data; |
| 1261 | if (fw_header->magic != FM_FW_FILE_HEADER_MAGIC) { |
| 1262 | fmerr("%s not a legal TI firmware file\n", fw_name); |
| 1263 | ret = -EINVAL; |
| 1264 | goto rel_fw; |
| 1265 | } |
| 1266 | fmdbg("FW(%s) magic number : 0x%x\n", fw_name, fw_header->magic); |
| 1267 | |
| 1268 | /* Skip file header info , we already verified it */ |
| 1269 | fw_data += sizeof(struct bts_header); |
| 1270 | fw_len -= sizeof(struct bts_header); |
| 1271 | |
| 1272 | while (fw_data && fw_len > 0) { |
| 1273 | action = (struct bts_action *)fw_data; |
| 1274 | |
| 1275 | switch (action->type) { |
| 1276 | case ACTION_SEND_COMMAND: /* Send */ |
| 1277 | if (fmc_send_cmd(fmdev, 0, 0, action->data, |
| 1278 | action->size, NULL, NULL)) |
| 1279 | goto rel_fw; |
| 1280 | |
| 1281 | cmd_cnt++; |
| 1282 | break; |
| 1283 | |
| 1284 | case ACTION_DELAY: /* Delay */ |
| 1285 | delay = (struct bts_action_delay *)action->data; |
| 1286 | mdelay(delay->msec); |
| 1287 | break; |
| 1288 | } |
| 1289 | |
| 1290 | fw_data += (sizeof(struct bts_action) + (action->size)); |
| 1291 | fw_len -= (sizeof(struct bts_action) + (action->size)); |
| 1292 | } |
| 1293 | fmdbg("Firmware commands(%d) loaded to chip\n", cmd_cnt); |
| 1294 | rel_fw: |
| 1295 | release_firmware(fw_entry); |
| 1296 | clear_bit(FM_FW_DW_INPROGRESS, &fmdev->flag); |
| 1297 | |
| 1298 | return ret; |
| 1299 | } |
| 1300 | |
| 1301 | /* Loads default RX configuration to the chip */ |
| 1302 | static int load_default_rx_configuration(struct fmdev *fmdev) |
| 1303 | { |
| 1304 | int ret; |
| 1305 | |
| 1306 | ret = fm_rx_set_volume(fmdev, FM_DEFAULT_RX_VOLUME); |
| 1307 | if (ret < 0) |
| 1308 | return ret; |
| 1309 | |
| 1310 | return fm_rx_set_rssi_threshold(fmdev, FM_DEFAULT_RSSI_THRESHOLD); |
| 1311 | } |
| 1312 | |
| 1313 | /* Does FM power on sequence */ |
| 1314 | static int fm_power_up(struct fmdev *fmdev, u8 mode) |
| 1315 | { |
| 1316 | u16 payload, asic_id, asic_ver; |
| 1317 | int resp_len, ret; |
| 1318 | u8 fw_name[50]; |
| 1319 | |
| 1320 | if (mode >= FM_MODE_ENTRY_MAX) { |
| 1321 | fmerr("Invalid firmware download option\n"); |
| 1322 | return -EINVAL; |
| 1323 | } |
| 1324 | |
| 1325 | /* |
| 1326 | * Initialize FM common module. FM GPIO toggling is |
| 1327 | * taken care in Shared Transport driver. |
| 1328 | */ |
| 1329 | ret = fmc_prepare(fmdev); |
| 1330 | if (ret < 0) { |
| 1331 | fmerr("Unable to prepare FM Common\n"); |
| 1332 | return ret; |
| 1333 | } |
| 1334 | |
| 1335 | payload = FM_ENABLE; |
| 1336 | if (fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload, |
| 1337 | sizeof(payload), NULL, NULL)) |
| 1338 | goto rel; |
| 1339 | |
| 1340 | /* Allow the chip to settle down in Channel-8 mode */ |
| 1341 | msleep(20); |
| 1342 | |
| 1343 | if (fmc_send_cmd(fmdev, ASIC_ID_GET, REG_RD, NULL, |
| 1344 | sizeof(asic_id), &asic_id, &resp_len)) |
| 1345 | goto rel; |
| 1346 | |
| 1347 | if (fmc_send_cmd(fmdev, ASIC_VER_GET, REG_RD, NULL, |
| 1348 | sizeof(asic_ver), &asic_ver, &resp_len)) |
| 1349 | goto rel; |
| 1350 | |
| 1351 | fmdbg("ASIC ID: 0x%x , ASIC Version: %d\n", |
| 1352 | be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); |
| 1353 | |
| 1354 | sprintf(fw_name, "%s_%x.%d.bts", FM_FMC_FW_FILE_START, |
| 1355 | be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); |
| 1356 | |
| 1357 | ret = fm_download_firmware(fmdev, fw_name); |
| 1358 | if (ret < 0) { |
| 1359 | fmdbg("Failed to download firmware file %s\n", fw_name); |
| 1360 | goto rel; |
| 1361 | } |
| 1362 | sprintf(fw_name, "%s_%x.%d.bts", (mode == FM_MODE_RX) ? |
| 1363 | FM_RX_FW_FILE_START : FM_TX_FW_FILE_START, |
| 1364 | be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); |
| 1365 | |
| 1366 | ret = fm_download_firmware(fmdev, fw_name); |
| 1367 | if (ret < 0) { |
| 1368 | fmdbg("Failed to download firmware file %s\n", fw_name); |
| 1369 | goto rel; |
| 1370 | } else |
| 1371 | return ret; |
| 1372 | rel: |
| 1373 | return fmc_release(fmdev); |
| 1374 | } |
| 1375 | |
| 1376 | /* Set FM Modes(TX, RX, OFF) */ |
| 1377 | int fmc_set_mode(struct fmdev *fmdev, u8 fm_mode) |
| 1378 | { |
| 1379 | int ret = 0; |
| 1380 | |
| 1381 | if (fm_mode >= FM_MODE_ENTRY_MAX) { |
| 1382 | fmerr("Invalid FM mode\n"); |
| 1383 | return -EINVAL; |
| 1384 | } |
| 1385 | if (fmdev->curr_fmmode == fm_mode) { |
| 1386 | fmdbg("Already fm is in mode(%d)\n", fm_mode); |
| 1387 | return ret; |
| 1388 | } |
| 1389 | |
| 1390 | switch (fm_mode) { |
| 1391 | case FM_MODE_OFF: /* OFF Mode */ |
| 1392 | ret = fm_power_down(fmdev); |
| 1393 | if (ret < 0) { |
| 1394 | fmerr("Failed to set OFF mode\n"); |
| 1395 | return ret; |
| 1396 | } |
| 1397 | break; |
| 1398 | |
| 1399 | case FM_MODE_TX: /* TX Mode */ |
| 1400 | case FM_MODE_RX: /* RX Mode */ |
| 1401 | /* Power down before switching to TX or RX mode */ |
| 1402 | if (fmdev->curr_fmmode != FM_MODE_OFF) { |
| 1403 | ret = fm_power_down(fmdev); |
| 1404 | if (ret < 0) { |
| 1405 | fmerr("Failed to set OFF mode\n"); |
| 1406 | return ret; |
| 1407 | } |
| 1408 | msleep(30); |
| 1409 | } |
| 1410 | ret = fm_power_up(fmdev, fm_mode); |
| 1411 | if (ret < 0) { |
| 1412 | fmerr("Failed to load firmware\n"); |
| 1413 | return ret; |
| 1414 | } |
| 1415 | } |
| 1416 | fmdev->curr_fmmode = fm_mode; |
| 1417 | |
| 1418 | /* Set default configuration */ |
| 1419 | if (fmdev->curr_fmmode == FM_MODE_RX) { |
| 1420 | fmdbg("Loading default rx configuration..\n"); |
| 1421 | ret = load_default_rx_configuration(fmdev); |
| 1422 | if (ret < 0) |
| 1423 | fmerr("Failed to load default values\n"); |
| 1424 | } |
| 1425 | |
| 1426 | return ret; |
| 1427 | } |
| 1428 | |
| 1429 | /* Returns current FM mode (TX, RX, OFF) */ |
| 1430 | int fmc_get_mode(struct fmdev *fmdev, u8 *fmmode) |
| 1431 | { |
| 1432 | if (!test_bit(FM_CORE_READY, &fmdev->flag)) { |
| 1433 | fmerr("FM core is not ready\n"); |
| 1434 | return -EPERM; |
| 1435 | } |
| 1436 | if (fmmode == NULL) { |
| 1437 | fmerr("Invalid memory\n"); |
| 1438 | return -ENOMEM; |
| 1439 | } |
| 1440 | |
| 1441 | *fmmode = fmdev->curr_fmmode; |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
| 1445 | /* Called by ST layer when FM packet is available */ |
| 1446 | static long fm_st_receive(void *arg, struct sk_buff *skb) |
| 1447 | { |
| 1448 | struct fmdev *fmdev; |
| 1449 | |
| 1450 | fmdev = (struct fmdev *)arg; |
| 1451 | |
| 1452 | if (skb == NULL) { |
| 1453 | fmerr("Invalid SKB received from ST\n"); |
| 1454 | return -EFAULT; |
| 1455 | } |
| 1456 | |
| 1457 | if (skb->cb[0] != FM_PKT_LOGICAL_CHAN_NUMBER) { |
| 1458 | fmerr("Received SKB (%p) is not FM Channel 8 pkt\n", skb); |
| 1459 | return -EINVAL; |
| 1460 | } |
| 1461 | |
| 1462 | memcpy(skb_push(skb, 1), &skb->cb[0], 1); |
| 1463 | skb_queue_tail(&fmdev->rx_q, skb); |
| 1464 | tasklet_schedule(&fmdev->rx_task); |
| 1465 | |
| 1466 | return 0; |
| 1467 | } |
| 1468 | |
| 1469 | /* |
| 1470 | * Called by ST layer to indicate protocol registration completion |
| 1471 | * status. |
| 1472 | */ |
| 1473 | static void fm_st_reg_comp_cb(void *arg, char data) |
| 1474 | { |
| 1475 | struct fmdev *fmdev; |
| 1476 | |
| 1477 | fmdev = (struct fmdev *)arg; |
| 1478 | fmdev->streg_cbdata = data; |
| 1479 | complete(&wait_for_fmdrv_reg_comp); |
| 1480 | } |
| 1481 | |
| 1482 | /* |
| 1483 | * This function will be called from FM V4L2 open function. |
| 1484 | * Register with ST driver and initialize driver data. |
| 1485 | */ |
| 1486 | int fmc_prepare(struct fmdev *fmdev) |
| 1487 | { |
| 1488 | static struct st_proto_s fm_st_proto; |
| 1489 | int ret; |
| 1490 | |
| 1491 | if (test_bit(FM_CORE_READY, &fmdev->flag)) { |
| 1492 | fmdbg("FM Core is already up\n"); |
| 1493 | return 0; |
| 1494 | } |
| 1495 | |
| 1496 | memset(&fm_st_proto, 0, sizeof(fm_st_proto)); |
| 1497 | fm_st_proto.recv = fm_st_receive; |
| 1498 | fm_st_proto.match_packet = NULL; |
| 1499 | fm_st_proto.reg_complete_cb = fm_st_reg_comp_cb; |
| 1500 | fm_st_proto.write = NULL; /* TI ST driver will fill write pointer */ |
| 1501 | fm_st_proto.priv_data = fmdev; |
| 1502 | fm_st_proto.chnl_id = 0x08; |
| 1503 | fm_st_proto.max_frame_size = 0xff; |
| 1504 | fm_st_proto.hdr_len = 1; |
| 1505 | fm_st_proto.offset_len_in_hdr = 0; |
| 1506 | fm_st_proto.len_size = 1; |
| 1507 | fm_st_proto.reserve = 1; |
| 1508 | |
| 1509 | ret = st_register(&fm_st_proto); |
| 1510 | if (ret == -EINPROGRESS) { |
| 1511 | init_completion(&wait_for_fmdrv_reg_comp); |
| 1512 | fmdev->streg_cbdata = -EINPROGRESS; |
| 1513 | fmdbg("%s waiting for ST reg completion signal\n", __func__); |
| 1514 | |
| 1515 | if (!wait_for_completion_timeout(&wait_for_fmdrv_reg_comp, |
| 1516 | FM_ST_REG_TIMEOUT)) { |
| 1517 | fmerr("Timeout(%d sec), didn't get reg " |
| 1518 | "completion signal from ST\n", |
| 1519 | jiffies_to_msecs(FM_ST_REG_TIMEOUT) / 1000); |
| 1520 | return -ETIMEDOUT; |
| 1521 | } |
| 1522 | if (fmdev->streg_cbdata != 0) { |
| 1523 | fmerr("ST reg comp CB called with error " |
| 1524 | "status %d\n", fmdev->streg_cbdata); |
| 1525 | return -EAGAIN; |
| 1526 | } |
| 1527 | |
| 1528 | ret = 0; |
| 1529 | } else if (ret == -1) { |
| 1530 | fmerr("st_register failed %d\n", ret); |
| 1531 | return -EAGAIN; |
| 1532 | } |
| 1533 | |
| 1534 | if (fm_st_proto.write != NULL) { |
| 1535 | g_st_write = fm_st_proto.write; |
| 1536 | } else { |
| 1537 | fmerr("Failed to get ST write func pointer\n"); |
| 1538 | ret = st_unregister(&fm_st_proto); |
| 1539 | if (ret < 0) |
| 1540 | fmerr("st_unregister failed %d\n", ret); |
| 1541 | return -EAGAIN; |
| 1542 | } |
| 1543 | |
| 1544 | spin_lock_init(&fmdev->rds_buff_lock); |
| 1545 | spin_lock_init(&fmdev->resp_skb_lock); |
| 1546 | |
| 1547 | /* Initialize TX queue and TX tasklet */ |
| 1548 | skb_queue_head_init(&fmdev->tx_q); |
| 1549 | tasklet_init(&fmdev->tx_task, send_tasklet, (unsigned long)fmdev); |
| 1550 | |
| 1551 | /* Initialize RX Queue and RX tasklet */ |
| 1552 | skb_queue_head_init(&fmdev->rx_q); |
| 1553 | tasklet_init(&fmdev->rx_task, recv_tasklet, (unsigned long)fmdev); |
| 1554 | |
| 1555 | fmdev->irq_info.stage = 0; |
| 1556 | atomic_set(&fmdev->tx_cnt, 1); |
| 1557 | fmdev->resp_comp = NULL; |
| 1558 | |
| 1559 | init_timer(&fmdev->irq_info.timer); |
| 1560 | fmdev->irq_info.timer.function = &int_timeout_handler; |
| 1561 | fmdev->irq_info.timer.data = (unsigned long)fmdev; |
| 1562 | /*TODO: add FM_STIC_EVENT later */ |
| 1563 | fmdev->irq_info.mask = FM_MAL_EVENT; |
| 1564 | |
| 1565 | /* Region info */ |
| 1566 | fmdev->rx.region = region_configs[default_radio_region]; |
| 1567 | |
| 1568 | fmdev->rx.mute_mode = FM_MUTE_OFF; |
| 1569 | fmdev->rx.rf_depend_mute = FM_RX_RF_DEPENDENT_MUTE_OFF; |
| 1570 | fmdev->rx.rds.flag = FM_RDS_DISABLE; |
| 1571 | fmdev->rx.freq = FM_UNDEFINED_FREQ; |
| 1572 | fmdev->rx.rds_mode = FM_RDS_SYSTEM_RDS; |
| 1573 | fmdev->rx.af_mode = FM_RX_RDS_AF_SWITCH_MODE_OFF; |
| 1574 | fmdev->irq_info.retry = 0; |
| 1575 | |
| 1576 | fm_rx_reset_rds_cache(fmdev); |
| 1577 | init_waitqueue_head(&fmdev->rx.rds.read_queue); |
| 1578 | |
| 1579 | fm_rx_reset_station_info(fmdev); |
| 1580 | set_bit(FM_CORE_READY, &fmdev->flag); |
| 1581 | |
| 1582 | return ret; |
| 1583 | } |
| 1584 | |
| 1585 | /* |
| 1586 | * This function will be called from FM V4L2 release function. |
| 1587 | * Unregister from ST driver. |
| 1588 | */ |
| 1589 | int fmc_release(struct fmdev *fmdev) |
| 1590 | { |
| 1591 | static struct st_proto_s fm_st_proto; |
| 1592 | int ret; |
| 1593 | |
| 1594 | if (!test_bit(FM_CORE_READY, &fmdev->flag)) { |
| 1595 | fmdbg("FM Core is already down\n"); |
| 1596 | return 0; |
| 1597 | } |
| 1598 | /* Service pending read */ |
| 1599 | wake_up_interruptible(&fmdev->rx.rds.read_queue); |
| 1600 | |
| 1601 | tasklet_kill(&fmdev->tx_task); |
| 1602 | tasklet_kill(&fmdev->rx_task); |
| 1603 | |
| 1604 | skb_queue_purge(&fmdev->tx_q); |
| 1605 | skb_queue_purge(&fmdev->rx_q); |
| 1606 | |
| 1607 | fmdev->resp_comp = NULL; |
| 1608 | fmdev->rx.freq = 0; |
| 1609 | |
| 1610 | memset(&fm_st_proto, 0, sizeof(fm_st_proto)); |
| 1611 | fm_st_proto.chnl_id = 0x08; |
| 1612 | |
| 1613 | ret = st_unregister(&fm_st_proto); |
| 1614 | |
| 1615 | if (ret < 0) |
| 1616 | fmerr("Failed to de-register FM from ST %d\n", ret); |
| 1617 | else |
| 1618 | fmdbg("Successfully unregistered from ST\n"); |
| 1619 | |
| 1620 | clear_bit(FM_CORE_READY, &fmdev->flag); |
| 1621 | return ret; |
| 1622 | } |
| 1623 | |
| 1624 | /* |
| 1625 | * Module init function. Ask FM V4L module to register video device. |
| 1626 | * Allocate memory for FM driver context and RX RDS buffer. |
| 1627 | */ |
| 1628 | static int __init fm_drv_init(void) |
| 1629 | { |
| 1630 | struct fmdev *fmdev = NULL; |
| 1631 | int ret = -ENOMEM; |
| 1632 | |
| 1633 | fmdbg("FM driver version %s\n", FM_DRV_VERSION); |
| 1634 | |
| 1635 | fmdev = kzalloc(sizeof(struct fmdev), GFP_KERNEL); |
| 1636 | if (NULL == fmdev) { |
| 1637 | fmerr("Can't allocate operation structure memory\n"); |
| 1638 | return ret; |
| 1639 | } |
| 1640 | fmdev->rx.rds.buf_size = default_rds_buf * FM_RDS_BLK_SIZE; |
| 1641 | fmdev->rx.rds.buff = kzalloc(fmdev->rx.rds.buf_size, GFP_KERNEL); |
| 1642 | if (NULL == fmdev->rx.rds.buff) { |
| 1643 | fmerr("Can't allocate rds ring buffer\n"); |
| 1644 | goto rel_dev; |
| 1645 | } |
| 1646 | |
| 1647 | ret = fm_v4l2_init_video_device(fmdev, radio_nr); |
| 1648 | if (ret < 0) |
| 1649 | goto rel_rdsbuf; |
| 1650 | |
| 1651 | fmdev->irq_info.handlers = int_handler_table; |
| 1652 | fmdev->curr_fmmode = FM_MODE_OFF; |
| 1653 | fmdev->tx_data.pwr_lvl = FM_PWR_LVL_DEF; |
| 1654 | fmdev->tx_data.preemph = FM_TX_PREEMPH_50US; |
| 1655 | return ret; |
| 1656 | |
| 1657 | rel_rdsbuf: |
| 1658 | kfree(fmdev->rx.rds.buff); |
| 1659 | rel_dev: |
| 1660 | kfree(fmdev); |
| 1661 | |
| 1662 | return ret; |
| 1663 | } |
| 1664 | |
| 1665 | /* Module exit function. Ask FM V4L module to unregister video device */ |
| 1666 | static void __exit fm_drv_exit(void) |
| 1667 | { |
| 1668 | struct fmdev *fmdev = NULL; |
| 1669 | |
| 1670 | fmdev = fm_v4l2_deinit_video_device(); |
| 1671 | if (fmdev != NULL) { |
| 1672 | kfree(fmdev->rx.rds.buff); |
| 1673 | kfree(fmdev); |
| 1674 | } |
| 1675 | } |
| 1676 | |
| 1677 | module_init(fm_drv_init); |
| 1678 | module_exit(fm_drv_exit); |
| 1679 | |
| 1680 | /* ------------- Module Info ------------- */ |
| 1681 | MODULE_AUTHOR("Manjunatha Halli <manjunatha_halli@ti.com>"); |
| 1682 | MODULE_DESCRIPTION("FM Driver for TI's Connectivity chip. " FM_DRV_VERSION); |
| 1683 | MODULE_VERSION(FM_DRV_VERSION); |
| 1684 | MODULE_LICENSE("GPL"); |