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e8454ff7 MH |
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); | |
aeae69da | 71 | MODULE_PARM_DESC(default_rds_buf, "RDS buffer entries"); |
e8454ff7 MH |
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 | ||
883cdd5e | 178 | static long (*g_st_write) (struct sk_buff *skb); |
e8454ff7 MH |
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)) { | |
cfa746b3 HV |
274 | fmerr("skb(%p) has only %d bytes, " |
275 | "at least need %zu bytes to decode\n", skb, | |
e8454ff7 MH |
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 | ||
25985edc | 355 | /* Check, is there any timeout happened to last transmitted packet */ |
e8454ff7 MH |
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 | */ | |
a6127803 | 390 | static int fm_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload, |
e8454ff7 MH |
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) | |
2a8b7e58 | 443 | *(__be16 *)payload = cpu_to_be16(*(u16 *)payload); |
e8454ff7 MH |
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 */ | |
a6127803 | 459 | int fmc_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload, |
e8454ff7 MH |
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; | |
a6127803 | 465 | int ret; |
e8454ff7 MH |
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 | ||
a6127803 XW |
473 | if (!wait_for_completion_timeout(&fmdev->maintask_comp, |
474 | FM_DRV_TX_TIMEOUT)) { | |
e8454ff7 MH |
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) { | |
25985edc | 481 | fmerr("Response SKB is missing\n"); |
e8454ff7 MH |
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 ---*/ | |
a6127803 | 511 | static inline int check_cmdresp_status(struct fmdev *fmdev, |
e8454ff7 MH |
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 | ||
2a8b7e58 | 598 | fmdev->irq_info.flag = be16_to_cpu((__force __be16)fmdev->irq_info.flag); |
e8454ff7 MH |
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 | { | |
e8454ff7 MH |
692 | u8 index = 0; |
693 | u8 *rds_buff; | |
694 | ||
695 | /* | |
696 | * Since in Orca the 2 RDS Data bytes are in little endian and | |
697 | * in Dolphin they are in big endian, the parsing of the RDS data | |
698 | * is chip dependent | |
699 | */ | |
700 | if (fmdev->asci_id != 0x6350) { | |
701 | rds_buff = &rds_format->data.groupdatabuff.buff[0]; | |
702 | while (index + 1 < FM_RX_RDS_INFO_FIELD_MAX) { | |
453f847e | 703 | swap(rds_buff[index], rds_buff[index + 1]); |
e8454ff7 MH |
704 | index += 2; |
705 | } | |
706 | } | |
707 | } | |
708 | ||
709 | static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *fmdev) | |
710 | { | |
711 | struct sk_buff *skb; | |
712 | struct fm_rdsdata_format rds_fmt; | |
713 | struct fm_rds *rds = &fmdev->rx.rds; | |
714 | unsigned long group_idx, flags; | |
5255e4d9 | 715 | u8 *rds_data, meta_data, tmpbuf[FM_RDS_BLK_SIZE]; |
e8454ff7 MH |
716 | u8 type, blk_idx; |
717 | u16 cur_picode; | |
718 | u32 rds_len; | |
719 | ||
720 | if (check_cmdresp_status(fmdev, &skb)) | |
721 | return; | |
722 | ||
723 | /* Skip header info */ | |
724 | skb_pull(skb, sizeof(struct fm_event_msg_hdr)); | |
725 | rds_data = skb->data; | |
726 | rds_len = skb->len; | |
727 | ||
728 | /* Parse the RDS data */ | |
729 | while (rds_len >= FM_RDS_BLK_SIZE) { | |
730 | meta_data = rds_data[2]; | |
731 | /* Get the type: 0=A, 1=B, 2=C, 3=C', 4=D, 5=E */ | |
732 | type = (meta_data & 0x07); | |
733 | ||
734 | /* Transform the blk type into index sequence (0, 1, 2, 3, 4) */ | |
735 | blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1)); | |
736 | fmdbg("Block index:%d(%s)\n", blk_idx, | |
737 | (meta_data & FM_RDS_STATUS_ERR_MASK) ? "Bad" : "Ok"); | |
738 | ||
739 | if ((meta_data & FM_RDS_STATUS_ERR_MASK) != 0) | |
740 | break; | |
741 | ||
5a3ef810 | 742 | if (blk_idx > FM_RDS_BLK_IDX_D) { |
e8454ff7 MH |
743 | fmdbg("Block sequence mismatch\n"); |
744 | rds->last_blk_idx = -1; | |
745 | break; | |
746 | } | |
747 | ||
748 | /* Skip checkword (control) byte and copy only data byte */ | |
749 | memcpy(&rds_fmt.data.groupdatabuff. | |
750 | buff[blk_idx * (FM_RDS_BLK_SIZE - 1)], | |
751 | rds_data, (FM_RDS_BLK_SIZE - 1)); | |
752 | ||
753 | rds->last_blk_idx = blk_idx; | |
754 | ||
755 | /* If completed a whole group then handle it */ | |
756 | if (blk_idx == FM_RDS_BLK_IDX_D) { | |
757 | fmdbg("Good block received\n"); | |
758 | fm_rdsparse_swapbytes(fmdev, &rds_fmt); | |
759 | ||
760 | /* | |
761 | * Extract PI code and store in local cache. | |
762 | * We need this during AF switch processing. | |
763 | */ | |
2a8b7e58 | 764 | cur_picode = be16_to_cpu((__force __be16)rds_fmt.data.groupgeneral.pidata); |
e8454ff7 MH |
765 | if (fmdev->rx.stat_info.picode != cur_picode) |
766 | fmdev->rx.stat_info.picode = cur_picode; | |
767 | ||
768 | fmdbg("picode:%d\n", cur_picode); | |
769 | ||
770 | group_idx = (rds_fmt.data.groupgeneral.blk_b[0] >> 3); | |
771 | fmdbg("(fmdrv):Group:%ld%s\n", group_idx/2, | |
772 | (group_idx % 2) ? "B" : "A"); | |
773 | ||
774 | group_idx = 1 << (rds_fmt.data.groupgeneral.blk_b[0] >> 3); | |
775 | if (group_idx == FM_RDS_GROUP_TYPE_MASK_0A) { | |
776 | fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[0]); | |
777 | fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[1]); | |
778 | } | |
779 | } | |
780 | rds_len -= FM_RDS_BLK_SIZE; | |
781 | rds_data += FM_RDS_BLK_SIZE; | |
782 | } | |
783 | ||
784 | /* Copy raw rds data to internal rds buffer */ | |
785 | rds_data = skb->data; | |
786 | rds_len = skb->len; | |
787 | ||
788 | spin_lock_irqsave(&fmdev->rds_buff_lock, flags); | |
789 | while (rds_len > 0) { | |
790 | /* | |
791 | * Fill RDS buffer as per V4L2 specification. | |
792 | * Store control byte | |
793 | */ | |
794 | type = (rds_data[2] & 0x07); | |
795 | blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1)); | |
796 | tmpbuf[2] = blk_idx; /* Offset name */ | |
797 | tmpbuf[2] |= blk_idx << 3; /* Received offset */ | |
798 | ||
799 | /* Store data byte */ | |
800 | tmpbuf[0] = rds_data[0]; | |
801 | tmpbuf[1] = rds_data[1]; | |
802 | ||
803 | memcpy(&rds->buff[rds->wr_idx], &tmpbuf, FM_RDS_BLK_SIZE); | |
804 | rds->wr_idx = (rds->wr_idx + FM_RDS_BLK_SIZE) % rds->buf_size; | |
805 | ||
806 | /* Check for overflow & start over */ | |
807 | if (rds->wr_idx == rds->rd_idx) { | |
808 | fmdbg("RDS buffer overflow\n"); | |
809 | rds->wr_idx = 0; | |
810 | rds->rd_idx = 0; | |
811 | break; | |
812 | } | |
813 | rds_len -= FM_RDS_BLK_SIZE; | |
814 | rds_data += FM_RDS_BLK_SIZE; | |
815 | } | |
816 | spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); | |
817 | ||
818 | /* Wakeup read queue */ | |
819 | if (rds->wr_idx != rds->rd_idx) | |
820 | wake_up_interruptible(&rds->read_queue); | |
821 | ||
822 | fm_irq_call_stage(fmdev, FM_RDS_FINISH_IDX); | |
823 | } | |
824 | ||
825 | static void fm_irq_handle_rds_finish(struct fmdev *fmdev) | |
826 | { | |
827 | fm_irq_call_stage(fmdev, FM_HW_TUNE_OP_ENDED_IDX); | |
828 | } | |
829 | ||
830 | static void fm_irq_handle_tune_op_ended(struct fmdev *fmdev) | |
831 | { | |
832 | if (fmdev->irq_info.flag & (FM_FR_EVENT | FM_BL_EVENT) & fmdev-> | |
833 | irq_info.mask) { | |
834 | fmdbg("irq: tune ended/bandlimit reached\n"); | |
835 | if (test_and_clear_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag)) { | |
836 | fmdev->irq_info.stage = FM_AF_JUMP_RD_FREQ_IDX; | |
837 | } else { | |
838 | complete(&fmdev->maintask_comp); | |
839 | fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX; | |
840 | } | |
841 | } else | |
842 | fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX; | |
843 | ||
844 | fm_irq_call(fmdev); | |
845 | } | |
846 | ||
847 | static void fm_irq_handle_power_enb(struct fmdev *fmdev) | |
848 | { | |
849 | if (fmdev->irq_info.flag & FM_POW_ENB_EVENT) { | |
850 | fmdbg("irq: Power Enabled/Disabled\n"); | |
851 | complete(&fmdev->maintask_comp); | |
852 | } | |
853 | ||
854 | fm_irq_call_stage(fmdev, FM_LOW_RSSI_START_IDX); | |
855 | } | |
856 | ||
857 | static void fm_irq_handle_low_rssi_start(struct fmdev *fmdev) | |
858 | { | |
859 | if ((fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) && | |
860 | (fmdev->irq_info.flag & FM_LEV_EVENT & fmdev->irq_info.mask) && | |
861 | (fmdev->rx.freq != FM_UNDEFINED_FREQ) && | |
862 | (fmdev->rx.stat_info.afcache_size != 0)) { | |
863 | fmdbg("irq: rssi level has fallen below threshold level\n"); | |
864 | ||
865 | /* Disable further low RSSI interrupts */ | |
866 | fmdev->irq_info.mask &= ~FM_LEV_EVENT; | |
867 | ||
868 | fmdev->rx.afjump_idx = 0; | |
869 | fmdev->rx.freq_before_jump = fmdev->rx.freq; | |
870 | fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX; | |
871 | } else { | |
872 | /* Continue next function in interrupt handler table */ | |
873 | fmdev->irq_info.stage = FM_SEND_INTMSK_CMD_IDX; | |
874 | } | |
875 | ||
876 | fm_irq_call(fmdev); | |
877 | } | |
878 | ||
879 | static void fm_irq_afjump_set_pi(struct fmdev *fmdev) | |
880 | { | |
881 | u16 payload; | |
882 | ||
883 | /* Set PI code - must be updated if the AF list is not empty */ | |
884 | payload = fmdev->rx.stat_info.picode; | |
885 | if (!fm_send_cmd(fmdev, RDS_PI_SET, REG_WR, &payload, sizeof(payload), NULL)) | |
886 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_RESP_IDX); | |
887 | } | |
888 | ||
889 | static void fm_irq_handle_set_pi_resp(struct fmdev *fmdev) | |
890 | { | |
891 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SETPI_MASK_IDX); | |
892 | } | |
893 | ||
894 | /* | |
895 | * Set PI mask. | |
896 | * 0xFFFF = Enable PI code matching | |
897 | * 0x0000 = Disable PI code matching | |
898 | */ | |
899 | static void fm_irq_afjump_set_pimask(struct fmdev *fmdev) | |
900 | { | |
901 | u16 payload; | |
902 | ||
903 | payload = 0x0000; | |
904 | if (!fm_send_cmd(fmdev, RDS_PI_MASK_SET, REG_WR, &payload, sizeof(payload), NULL)) | |
905 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX); | |
906 | } | |
907 | ||
908 | static void fm_irq_handle_set_pimask_resp(struct fmdev *fmdev) | |
909 | { | |
910 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SET_AF_FREQ_IDX); | |
911 | } | |
912 | ||
913 | static void fm_irq_afjump_setfreq(struct fmdev *fmdev) | |
914 | { | |
915 | u16 frq_index; | |
916 | u16 payload; | |
917 | ||
918 | fmdbg("Swtich to %d KHz\n", fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]); | |
919 | frq_index = (fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx] - | |
920 | fmdev->rx.region.bot_freq) / FM_FREQ_MUL; | |
921 | ||
922 | payload = frq_index; | |
923 | if (!fm_send_cmd(fmdev, AF_FREQ_SET, REG_WR, &payload, sizeof(payload), NULL)) | |
924 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX); | |
925 | } | |
926 | ||
927 | static void fm_irq_handle_setfreq_resp(struct fmdev *fmdev) | |
928 | { | |
929 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_ENABLE_INT_IDX); | |
930 | } | |
931 | ||
932 | static void fm_irq_afjump_enableint(struct fmdev *fmdev) | |
933 | { | |
934 | u16 payload; | |
935 | ||
936 | /* Enable FR (tuning operation ended) interrupt */ | |
937 | payload = FM_FR_EVENT; | |
938 | if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, sizeof(payload), NULL)) | |
939 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_ENABLE_INT_RESP_IDX); | |
940 | } | |
941 | ||
942 | static void fm_irq_afjump_enableint_resp(struct fmdev *fmdev) | |
943 | { | |
944 | fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_START_AFJUMP_IDX); | |
945 | } | |
946 | ||
947 | static void fm_irq_start_afjump(struct fmdev *fmdev) | |
948 | { | |
949 | u16 payload; | |
950 | ||
951 | payload = FM_TUNER_AF_JUMP_MODE; | |
952 | if (!fm_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload, | |
953 | sizeof(payload), NULL)) | |
954 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX); | |
955 | } | |
956 | ||
957 | static void fm_irq_handle_start_afjump_resp(struct fmdev *fmdev) | |
958 | { | |
959 | struct sk_buff *skb; | |
960 | ||
961 | if (check_cmdresp_status(fmdev, &skb)) | |
962 | return; | |
963 | ||
964 | fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX; | |
965 | set_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag); | |
966 | clear_bit(FM_INTTASK_RUNNING, &fmdev->flag); | |
967 | } | |
968 | ||
969 | static void fm_irq_afjump_rd_freq(struct fmdev *fmdev) | |
970 | { | |
971 | u16 payload; | |
972 | ||
973 | if (!fm_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, sizeof(payload), NULL)) | |
974 | fm_irq_timeout_stage(fmdev, FM_AF_JUMP_RD_FREQ_RESP_IDX); | |
975 | } | |
976 | ||
977 | static void fm_irq_afjump_rd_freq_resp(struct fmdev *fmdev) | |
978 | { | |
979 | struct sk_buff *skb; | |
980 | u16 read_freq; | |
981 | u32 curr_freq, jumped_freq; | |
982 | ||
983 | if (check_cmdresp_status(fmdev, &skb)) | |
984 | return; | |
985 | ||
986 | /* Skip header info and copy only response data */ | |
987 | skb_pull(skb, sizeof(struct fm_event_msg_hdr)); | |
988 | memcpy(&read_freq, skb->data, sizeof(read_freq)); | |
2a8b7e58 | 989 | read_freq = be16_to_cpu((__force __be16)read_freq); |
e8454ff7 MH |
990 | curr_freq = fmdev->rx.region.bot_freq + ((u32)read_freq * FM_FREQ_MUL); |
991 | ||
992 | jumped_freq = fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]; | |
993 | ||
994 | /* If the frequency was changed the jump succeeded */ | |
995 | if ((curr_freq != fmdev->rx.freq_before_jump) && (curr_freq == jumped_freq)) { | |
996 | fmdbg("Successfully switched to alternate freq %d\n", curr_freq); | |
997 | fmdev->rx.freq = curr_freq; | |
998 | fm_rx_reset_rds_cache(fmdev); | |
999 | ||
1000 | /* AF feature is on, enable low level RSSI interrupt */ | |
1001 | if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) | |
1002 | fmdev->irq_info.mask |= FM_LEV_EVENT; | |
1003 | ||
1004 | fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX; | |
1005 | } else { /* jump to the next freq in the AF list */ | |
1006 | fmdev->rx.afjump_idx++; | |
1007 | ||
1008 | /* If we reached the end of the list - stop searching */ | |
1009 | if (fmdev->rx.afjump_idx >= fmdev->rx.stat_info.afcache_size) { | |
1010 | fmdbg("AF switch processing failed\n"); | |
1011 | fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX; | |
1012 | } else { /* AF List is not over - try next one */ | |
1013 | ||
1014 | fmdbg("Trying next freq in AF cache\n"); | |
1015 | fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX; | |
1016 | } | |
1017 | } | |
1018 | fm_irq_call(fmdev); | |
1019 | } | |
1020 | ||
1021 | static void fm_irq_handle_low_rssi_finish(struct fmdev *fmdev) | |
1022 | { | |
1023 | fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX); | |
1024 | } | |
1025 | ||
1026 | static void fm_irq_send_intmsk_cmd(struct fmdev *fmdev) | |
1027 | { | |
1028 | u16 payload; | |
1029 | ||
1030 | /* Re-enable FM interrupts */ | |
1031 | payload = fmdev->irq_info.mask; | |
1032 | ||
1033 | if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, | |
1034 | sizeof(payload), NULL)) | |
1035 | fm_irq_timeout_stage(fmdev, FM_HANDLE_INTMSK_CMD_RESP_IDX); | |
1036 | } | |
1037 | ||
1038 | static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *fmdev) | |
1039 | { | |
1040 | struct sk_buff *skb; | |
1041 | ||
1042 | if (check_cmdresp_status(fmdev, &skb)) | |
1043 | return; | |
1044 | /* | |
1045 | * This is last function in interrupt table to be executed. | |
1046 | * So, reset stage index to 0. | |
1047 | */ | |
1048 | fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX; | |
1049 | ||
1050 | /* Start processing any pending interrupt */ | |
1051 | if (test_and_clear_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag)) | |
1052 | fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev); | |
1053 | else | |
1054 | clear_bit(FM_INTTASK_RUNNING, &fmdev->flag); | |
1055 | } | |
1056 | ||
1057 | /* Returns availability of RDS data in internel buffer */ | |
a6127803 | 1058 | int fmc_is_rds_data_available(struct fmdev *fmdev, struct file *file, |
e8454ff7 MH |
1059 | struct poll_table_struct *pts) |
1060 | { | |
1061 | poll_wait(file, &fmdev->rx.rds.read_queue, pts); | |
1062 | if (fmdev->rx.rds.rd_idx != fmdev->rx.rds.wr_idx) | |
1063 | return 0; | |
1064 | ||
1065 | return -EAGAIN; | |
1066 | } | |
1067 | ||
1068 | /* Copies RDS data from internal buffer to user buffer */ | |
a6127803 | 1069 | int fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file, |
e8454ff7 MH |
1070 | u8 __user *buf, size_t count) |
1071 | { | |
1072 | u32 block_count; | |
5255e4d9 | 1073 | u8 tmpbuf[FM_RDS_BLK_SIZE]; |
e8454ff7 MH |
1074 | unsigned long flags; |
1075 | int ret; | |
1076 | ||
1077 | if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) { | |
1078 | if (file->f_flags & O_NONBLOCK) | |
1079 | return -EWOULDBLOCK; | |
1080 | ||
1081 | ret = wait_event_interruptible(fmdev->rx.rds.read_queue, | |
1082 | (fmdev->rx.rds.wr_idx != fmdev->rx.rds.rd_idx)); | |
1083 | if (ret) | |
1084 | return -EINTR; | |
1085 | } | |
1086 | ||
1087 | /* Calculate block count from byte count */ | |
5255e4d9 | 1088 | count /= FM_RDS_BLK_SIZE; |
e8454ff7 MH |
1089 | block_count = 0; |
1090 | ret = 0; | |
1091 | ||
e8454ff7 | 1092 | while (block_count < count) { |
5255e4d9 | 1093 | spin_lock_irqsave(&fmdev->rds_buff_lock, flags); |
e8454ff7 | 1094 | |
5255e4d9 AK |
1095 | if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) { |
1096 | spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); | |
e8454ff7 | 1097 | break; |
5255e4d9 AK |
1098 | } |
1099 | memcpy(tmpbuf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx], | |
1100 | FM_RDS_BLK_SIZE); | |
e8454ff7 MH |
1101 | fmdev->rx.rds.rd_idx += FM_RDS_BLK_SIZE; |
1102 | if (fmdev->rx.rds.rd_idx >= fmdev->rx.rds.buf_size) | |
1103 | fmdev->rx.rds.rd_idx = 0; | |
1104 | ||
5255e4d9 AK |
1105 | spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); |
1106 | ||
1107 | if (copy_to_user(buf, tmpbuf, FM_RDS_BLK_SIZE)) | |
1108 | break; | |
1109 | ||
e8454ff7 MH |
1110 | block_count++; |
1111 | buf += FM_RDS_BLK_SIZE; | |
1112 | ret += FM_RDS_BLK_SIZE; | |
1113 | } | |
e8454ff7 MH |
1114 | return ret; |
1115 | } | |
1116 | ||
a6127803 | 1117 | int fmc_set_freq(struct fmdev *fmdev, u32 freq_to_set) |
e8454ff7 MH |
1118 | { |
1119 | switch (fmdev->curr_fmmode) { | |
1120 | case FM_MODE_RX: | |
1121 | return fm_rx_set_freq(fmdev, freq_to_set); | |
1122 | ||
1123 | case FM_MODE_TX: | |
1124 | return fm_tx_set_freq(fmdev, freq_to_set); | |
1125 | ||
1126 | default: | |
1127 | return -EINVAL; | |
1128 | } | |
1129 | } | |
1130 | ||
a6127803 | 1131 | int fmc_get_freq(struct fmdev *fmdev, u32 *cur_tuned_frq) |
e8454ff7 MH |
1132 | { |
1133 | if (fmdev->rx.freq == FM_UNDEFINED_FREQ) { | |
1134 | fmerr("RX frequency is not set\n"); | |
1135 | return -EPERM; | |
1136 | } | |
1137 | if (cur_tuned_frq == NULL) { | |
1138 | fmerr("Invalid memory\n"); | |
1139 | return -ENOMEM; | |
1140 | } | |
1141 | ||
1142 | switch (fmdev->curr_fmmode) { | |
1143 | case FM_MODE_RX: | |
1144 | *cur_tuned_frq = fmdev->rx.freq; | |
1145 | return 0; | |
1146 | ||
1147 | case FM_MODE_TX: | |
1148 | *cur_tuned_frq = 0; /* TODO : Change this later */ | |
1149 | return 0; | |
1150 | ||
1151 | default: | |
1152 | return -EINVAL; | |
1153 | } | |
1154 | ||
1155 | } | |
1156 | ||
a6127803 | 1157 | int fmc_set_region(struct fmdev *fmdev, u8 region_to_set) |
e8454ff7 MH |
1158 | { |
1159 | switch (fmdev->curr_fmmode) { | |
1160 | case FM_MODE_RX: | |
1161 | return fm_rx_set_region(fmdev, region_to_set); | |
1162 | ||
1163 | case FM_MODE_TX: | |
1164 | return fm_tx_set_region(fmdev, region_to_set); | |
1165 | ||
1166 | default: | |
1167 | return -EINVAL; | |
1168 | } | |
1169 | } | |
1170 | ||
a6127803 | 1171 | int fmc_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset) |
e8454ff7 MH |
1172 | { |
1173 | switch (fmdev->curr_fmmode) { | |
1174 | case FM_MODE_RX: | |
1175 | return fm_rx_set_mute_mode(fmdev, mute_mode_toset); | |
1176 | ||
1177 | case FM_MODE_TX: | |
1178 | return fm_tx_set_mute_mode(fmdev, mute_mode_toset); | |
1179 | ||
1180 | default: | |
1181 | return -EINVAL; | |
1182 | } | |
1183 | } | |
1184 | ||
a6127803 | 1185 | int fmc_set_stereo_mono(struct fmdev *fmdev, u16 mode) |
e8454ff7 MH |
1186 | { |
1187 | switch (fmdev->curr_fmmode) { | |
1188 | case FM_MODE_RX: | |
1189 | return fm_rx_set_stereo_mono(fmdev, mode); | |
1190 | ||
1191 | case FM_MODE_TX: | |
1192 | return fm_tx_set_stereo_mono(fmdev, mode); | |
1193 | ||
1194 | default: | |
1195 | return -EINVAL; | |
1196 | } | |
1197 | } | |
1198 | ||
a6127803 | 1199 | int fmc_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis) |
e8454ff7 MH |
1200 | { |
1201 | switch (fmdev->curr_fmmode) { | |
1202 | case FM_MODE_RX: | |
1203 | return fm_rx_set_rds_mode(fmdev, rds_en_dis); | |
1204 | ||
1205 | case FM_MODE_TX: | |
1206 | return fm_tx_set_rds_mode(fmdev, rds_en_dis); | |
1207 | ||
1208 | default: | |
1209 | return -EINVAL; | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | /* Sends power off command to the chip */ | |
a6127803 | 1214 | static int fm_power_down(struct fmdev *fmdev) |
e8454ff7 MH |
1215 | { |
1216 | u16 payload; | |
a6127803 | 1217 | int ret; |
e8454ff7 MH |
1218 | |
1219 | if (!test_bit(FM_CORE_READY, &fmdev->flag)) { | |
1220 | fmerr("FM core is not ready\n"); | |
1221 | return -EPERM; | |
1222 | } | |
1223 | if (fmdev->curr_fmmode == FM_MODE_OFF) { | |
1224 | fmdbg("FM chip is already in OFF state\n"); | |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | payload = 0x0; | |
1229 | ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload, | |
1230 | sizeof(payload), NULL, NULL); | |
1231 | if (ret < 0) | |
1232 | return ret; | |
1233 | ||
1234 | return fmc_release(fmdev); | |
1235 | } | |
1236 | ||
1237 | /* Reads init command from FM firmware file and loads to the chip */ | |
a6127803 | 1238 | static int fm_download_firmware(struct fmdev *fmdev, const u8 *fw_name) |
e8454ff7 MH |
1239 | { |
1240 | const struct firmware *fw_entry; | |
1241 | struct bts_header *fw_header; | |
1242 | struct bts_action *action; | |
1243 | struct bts_action_delay *delay; | |
1244 | u8 *fw_data; | |
1245 | int ret, fw_len, cmd_cnt; | |
1246 | ||
1247 | cmd_cnt = 0; | |
1248 | set_bit(FM_FW_DW_INPROGRESS, &fmdev->flag); | |
1249 | ||
1250 | ret = request_firmware(&fw_entry, fw_name, | |
1251 | &fmdev->radio_dev->dev); | |
1252 | if (ret < 0) { | |
1253 | fmerr("Unable to read firmware(%s) content\n", fw_name); | |
1254 | return ret; | |
1255 | } | |
1a5cfd02 | 1256 | fmdbg("Firmware(%s) length : %zu bytes\n", fw_name, fw_entry->size); |
e8454ff7 MH |
1257 | |
1258 | fw_data = (void *)fw_entry->data; | |
1259 | fw_len = fw_entry->size; | |
1260 | ||
1261 | fw_header = (struct bts_header *)fw_data; | |
1262 | if (fw_header->magic != FM_FW_FILE_HEADER_MAGIC) { | |
1263 | fmerr("%s not a legal TI firmware file\n", fw_name); | |
1264 | ret = -EINVAL; | |
1265 | goto rel_fw; | |
1266 | } | |
1267 | fmdbg("FW(%s) magic number : 0x%x\n", fw_name, fw_header->magic); | |
1268 | ||
1269 | /* Skip file header info , we already verified it */ | |
1270 | fw_data += sizeof(struct bts_header); | |
1271 | fw_len -= sizeof(struct bts_header); | |
1272 | ||
1273 | while (fw_data && fw_len > 0) { | |
1274 | action = (struct bts_action *)fw_data; | |
1275 | ||
1276 | switch (action->type) { | |
1277 | case ACTION_SEND_COMMAND: /* Send */ | |
1278 | if (fmc_send_cmd(fmdev, 0, 0, action->data, | |
1279 | action->size, NULL, NULL)) | |
1280 | goto rel_fw; | |
1281 | ||
1282 | cmd_cnt++; | |
1283 | break; | |
1284 | ||
1285 | case ACTION_DELAY: /* Delay */ | |
1286 | delay = (struct bts_action_delay *)action->data; | |
1287 | mdelay(delay->msec); | |
1288 | break; | |
1289 | } | |
1290 | ||
1291 | fw_data += (sizeof(struct bts_action) + (action->size)); | |
1292 | fw_len -= (sizeof(struct bts_action) + (action->size)); | |
1293 | } | |
1294 | fmdbg("Firmware commands(%d) loaded to chip\n", cmd_cnt); | |
1295 | rel_fw: | |
1296 | release_firmware(fw_entry); | |
1297 | clear_bit(FM_FW_DW_INPROGRESS, &fmdev->flag); | |
1298 | ||
1299 | return ret; | |
1300 | } | |
1301 | ||
1302 | /* Loads default RX configuration to the chip */ | |
a6127803 | 1303 | static int load_default_rx_configuration(struct fmdev *fmdev) |
e8454ff7 MH |
1304 | { |
1305 | int ret; | |
1306 | ||
1307 | ret = fm_rx_set_volume(fmdev, FM_DEFAULT_RX_VOLUME); | |
1308 | if (ret < 0) | |
1309 | return ret; | |
1310 | ||
1311 | return fm_rx_set_rssi_threshold(fmdev, FM_DEFAULT_RSSI_THRESHOLD); | |
1312 | } | |
1313 | ||
1314 | /* Does FM power on sequence */ | |
a6127803 | 1315 | static int fm_power_up(struct fmdev *fmdev, u8 mode) |
e8454ff7 | 1316 | { |
2a8b7e58 HV |
1317 | u16 payload; |
1318 | __be16 asic_id, asic_ver; | |
e8454ff7 MH |
1319 | int resp_len, ret; |
1320 | u8 fw_name[50]; | |
1321 | ||
1322 | if (mode >= FM_MODE_ENTRY_MAX) { | |
1323 | fmerr("Invalid firmware download option\n"); | |
1324 | return -EINVAL; | |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | * Initialize FM common module. FM GPIO toggling is | |
1329 | * taken care in Shared Transport driver. | |
1330 | */ | |
1331 | ret = fmc_prepare(fmdev); | |
1332 | if (ret < 0) { | |
1333 | fmerr("Unable to prepare FM Common\n"); | |
1334 | return ret; | |
1335 | } | |
1336 | ||
1337 | payload = FM_ENABLE; | |
1338 | if (fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload, | |
1339 | sizeof(payload), NULL, NULL)) | |
1340 | goto rel; | |
1341 | ||
1342 | /* Allow the chip to settle down in Channel-8 mode */ | |
1343 | msleep(20); | |
1344 | ||
1345 | if (fmc_send_cmd(fmdev, ASIC_ID_GET, REG_RD, NULL, | |
1346 | sizeof(asic_id), &asic_id, &resp_len)) | |
1347 | goto rel; | |
1348 | ||
1349 | if (fmc_send_cmd(fmdev, ASIC_VER_GET, REG_RD, NULL, | |
1350 | sizeof(asic_ver), &asic_ver, &resp_len)) | |
1351 | goto rel; | |
1352 | ||
1353 | fmdbg("ASIC ID: 0x%x , ASIC Version: %d\n", | |
1354 | be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); | |
1355 | ||
1356 | sprintf(fw_name, "%s_%x.%d.bts", FM_FMC_FW_FILE_START, | |
1357 | be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); | |
1358 | ||
1359 | ret = fm_download_firmware(fmdev, fw_name); | |
1360 | if (ret < 0) { | |
1361 | fmdbg("Failed to download firmware file %s\n", fw_name); | |
1362 | goto rel; | |
1363 | } | |
1364 | sprintf(fw_name, "%s_%x.%d.bts", (mode == FM_MODE_RX) ? | |
1365 | FM_RX_FW_FILE_START : FM_TX_FW_FILE_START, | |
1366 | be16_to_cpu(asic_id), be16_to_cpu(asic_ver)); | |
1367 | ||
1368 | ret = fm_download_firmware(fmdev, fw_name); | |
1369 | if (ret < 0) { | |
1370 | fmdbg("Failed to download firmware file %s\n", fw_name); | |
1371 | goto rel; | |
1372 | } else | |
1373 | return ret; | |
1374 | rel: | |
1375 | return fmc_release(fmdev); | |
1376 | } | |
1377 | ||
1378 | /* Set FM Modes(TX, RX, OFF) */ | |
a6127803 | 1379 | int fmc_set_mode(struct fmdev *fmdev, u8 fm_mode) |
e8454ff7 MH |
1380 | { |
1381 | int ret = 0; | |
1382 | ||
1383 | if (fm_mode >= FM_MODE_ENTRY_MAX) { | |
1384 | fmerr("Invalid FM mode\n"); | |
1385 | return -EINVAL; | |
1386 | } | |
1387 | if (fmdev->curr_fmmode == fm_mode) { | |
1388 | fmdbg("Already fm is in mode(%d)\n", fm_mode); | |
1389 | return ret; | |
1390 | } | |
1391 | ||
1392 | switch (fm_mode) { | |
1393 | case FM_MODE_OFF: /* OFF Mode */ | |
1394 | ret = fm_power_down(fmdev); | |
1395 | if (ret < 0) { | |
1396 | fmerr("Failed to set OFF mode\n"); | |
1397 | return ret; | |
1398 | } | |
1399 | break; | |
1400 | ||
1401 | case FM_MODE_TX: /* TX Mode */ | |
1402 | case FM_MODE_RX: /* RX Mode */ | |
1403 | /* Power down before switching to TX or RX mode */ | |
1404 | if (fmdev->curr_fmmode != FM_MODE_OFF) { | |
1405 | ret = fm_power_down(fmdev); | |
1406 | if (ret < 0) { | |
1407 | fmerr("Failed to set OFF mode\n"); | |
1408 | return ret; | |
1409 | } | |
1410 | msleep(30); | |
1411 | } | |
1412 | ret = fm_power_up(fmdev, fm_mode); | |
1413 | if (ret < 0) { | |
1414 | fmerr("Failed to load firmware\n"); | |
1415 | return ret; | |
1416 | } | |
1417 | } | |
1418 | fmdev->curr_fmmode = fm_mode; | |
1419 | ||
1420 | /* Set default configuration */ | |
1421 | if (fmdev->curr_fmmode == FM_MODE_RX) { | |
1422 | fmdbg("Loading default rx configuration..\n"); | |
1423 | ret = load_default_rx_configuration(fmdev); | |
1424 | if (ret < 0) | |
1425 | fmerr("Failed to load default values\n"); | |
1426 | } | |
1427 | ||
1428 | return ret; | |
1429 | } | |
1430 | ||
1431 | /* Returns current FM mode (TX, RX, OFF) */ | |
a6127803 | 1432 | int fmc_get_mode(struct fmdev *fmdev, u8 *fmmode) |
e8454ff7 MH |
1433 | { |
1434 | if (!test_bit(FM_CORE_READY, &fmdev->flag)) { | |
1435 | fmerr("FM core is not ready\n"); | |
1436 | return -EPERM; | |
1437 | } | |
1438 | if (fmmode == NULL) { | |
1439 | fmerr("Invalid memory\n"); | |
1440 | return -ENOMEM; | |
1441 | } | |
1442 | ||
1443 | *fmmode = fmdev->curr_fmmode; | |
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | /* Called by ST layer when FM packet is available */ | |
1448 | static long fm_st_receive(void *arg, struct sk_buff *skb) | |
1449 | { | |
1450 | struct fmdev *fmdev; | |
1451 | ||
1452 | fmdev = (struct fmdev *)arg; | |
1453 | ||
1454 | if (skb == NULL) { | |
1455 | fmerr("Invalid SKB received from ST\n"); | |
1456 | return -EFAULT; | |
1457 | } | |
1458 | ||
1459 | if (skb->cb[0] != FM_PKT_LOGICAL_CHAN_NUMBER) { | |
1460 | fmerr("Received SKB (%p) is not FM Channel 8 pkt\n", skb); | |
1461 | return -EINVAL; | |
1462 | } | |
1463 | ||
1464 | memcpy(skb_push(skb, 1), &skb->cb[0], 1); | |
1465 | skb_queue_tail(&fmdev->rx_q, skb); | |
1466 | tasklet_schedule(&fmdev->rx_task); | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | /* | |
1472 | * Called by ST layer to indicate protocol registration completion | |
1473 | * status. | |
1474 | */ | |
4360fa22 | 1475 | static void fm_st_reg_comp_cb(void *arg, int data) |
e8454ff7 MH |
1476 | { |
1477 | struct fmdev *fmdev; | |
1478 | ||
1479 | fmdev = (struct fmdev *)arg; | |
1480 | fmdev->streg_cbdata = data; | |
1481 | complete(&wait_for_fmdrv_reg_comp); | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * This function will be called from FM V4L2 open function. | |
1486 | * Register with ST driver and initialize driver data. | |
1487 | */ | |
a6127803 | 1488 | int fmc_prepare(struct fmdev *fmdev) |
e8454ff7 MH |
1489 | { |
1490 | static struct st_proto_s fm_st_proto; | |
a6127803 | 1491 | int ret; |
e8454ff7 MH |
1492 | |
1493 | if (test_bit(FM_CORE_READY, &fmdev->flag)) { | |
1494 | fmdbg("FM Core is already up\n"); | |
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | memset(&fm_st_proto, 0, sizeof(fm_st_proto)); | |
e8454ff7 MH |
1499 | fm_st_proto.recv = fm_st_receive; |
1500 | fm_st_proto.match_packet = NULL; | |
1501 | fm_st_proto.reg_complete_cb = fm_st_reg_comp_cb; | |
1502 | fm_st_proto.write = NULL; /* TI ST driver will fill write pointer */ | |
1503 | fm_st_proto.priv_data = fmdev; | |
6705a9cc MH |
1504 | fm_st_proto.chnl_id = 0x08; |
1505 | fm_st_proto.max_frame_size = 0xff; | |
1506 | fm_st_proto.hdr_len = 1; | |
1507 | fm_st_proto.offset_len_in_hdr = 0; | |
1508 | fm_st_proto.len_size = 1; | |
1509 | fm_st_proto.reserve = 1; | |
e8454ff7 MH |
1510 | |
1511 | ret = st_register(&fm_st_proto); | |
1512 | if (ret == -EINPROGRESS) { | |
1513 | init_completion(&wait_for_fmdrv_reg_comp); | |
1514 | fmdev->streg_cbdata = -EINPROGRESS; | |
1515 | fmdbg("%s waiting for ST reg completion signal\n", __func__); | |
1516 | ||
a6127803 XW |
1517 | if (!wait_for_completion_timeout(&wait_for_fmdrv_reg_comp, |
1518 | FM_ST_REG_TIMEOUT)) { | |
e8454ff7 MH |
1519 | fmerr("Timeout(%d sec), didn't get reg " |
1520 | "completion signal from ST\n", | |
1521 | jiffies_to_msecs(FM_ST_REG_TIMEOUT) / 1000); | |
1522 | return -ETIMEDOUT; | |
1523 | } | |
1524 | if (fmdev->streg_cbdata != 0) { | |
1525 | fmerr("ST reg comp CB called with error " | |
1526 | "status %d\n", fmdev->streg_cbdata); | |
1527 | return -EAGAIN; | |
1528 | } | |
1529 | ||
1530 | ret = 0; | |
1531 | } else if (ret == -1) { | |
1532 | fmerr("st_register failed %d\n", ret); | |
1533 | return -EAGAIN; | |
1534 | } | |
1535 | ||
1536 | if (fm_st_proto.write != NULL) { | |
1537 | g_st_write = fm_st_proto.write; | |
1538 | } else { | |
1539 | fmerr("Failed to get ST write func pointer\n"); | |
6705a9cc | 1540 | ret = st_unregister(&fm_st_proto); |
e8454ff7 MH |
1541 | if (ret < 0) |
1542 | fmerr("st_unregister failed %d\n", ret); | |
1543 | return -EAGAIN; | |
1544 | } | |
1545 | ||
1546 | spin_lock_init(&fmdev->rds_buff_lock); | |
1547 | spin_lock_init(&fmdev->resp_skb_lock); | |
1548 | ||
1549 | /* Initialize TX queue and TX tasklet */ | |
1550 | skb_queue_head_init(&fmdev->tx_q); | |
1551 | tasklet_init(&fmdev->tx_task, send_tasklet, (unsigned long)fmdev); | |
1552 | ||
1553 | /* Initialize RX Queue and RX tasklet */ | |
1554 | skb_queue_head_init(&fmdev->rx_q); | |
1555 | tasklet_init(&fmdev->rx_task, recv_tasklet, (unsigned long)fmdev); | |
1556 | ||
1557 | fmdev->irq_info.stage = 0; | |
1558 | atomic_set(&fmdev->tx_cnt, 1); | |
1559 | fmdev->resp_comp = NULL; | |
1560 | ||
1561 | init_timer(&fmdev->irq_info.timer); | |
1562 | fmdev->irq_info.timer.function = &int_timeout_handler; | |
1563 | fmdev->irq_info.timer.data = (unsigned long)fmdev; | |
1564 | /*TODO: add FM_STIC_EVENT later */ | |
1565 | fmdev->irq_info.mask = FM_MAL_EVENT; | |
1566 | ||
1567 | /* Region info */ | |
c84401c2 | 1568 | fmdev->rx.region = region_configs[default_radio_region]; |
e8454ff7 MH |
1569 | |
1570 | fmdev->rx.mute_mode = FM_MUTE_OFF; | |
1571 | fmdev->rx.rf_depend_mute = FM_RX_RF_DEPENDENT_MUTE_OFF; | |
1572 | fmdev->rx.rds.flag = FM_RDS_DISABLE; | |
1573 | fmdev->rx.freq = FM_UNDEFINED_FREQ; | |
1574 | fmdev->rx.rds_mode = FM_RDS_SYSTEM_RDS; | |
1575 | fmdev->rx.af_mode = FM_RX_RDS_AF_SWITCH_MODE_OFF; | |
1576 | fmdev->irq_info.retry = 0; | |
1577 | ||
1578 | fm_rx_reset_rds_cache(fmdev); | |
1579 | init_waitqueue_head(&fmdev->rx.rds.read_queue); | |
1580 | ||
1581 | fm_rx_reset_station_info(fmdev); | |
1582 | set_bit(FM_CORE_READY, &fmdev->flag); | |
1583 | ||
1584 | return ret; | |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * This function will be called from FM V4L2 release function. | |
1589 | * Unregister from ST driver. | |
1590 | */ | |
a6127803 | 1591 | int fmc_release(struct fmdev *fmdev) |
e8454ff7 | 1592 | { |
6705a9cc | 1593 | static struct st_proto_s fm_st_proto; |
a6127803 | 1594 | int ret; |
e8454ff7 MH |
1595 | |
1596 | if (!test_bit(FM_CORE_READY, &fmdev->flag)) { | |
1597 | fmdbg("FM Core is already down\n"); | |
1598 | return 0; | |
1599 | } | |
25985edc | 1600 | /* Service pending read */ |
e8454ff7 MH |
1601 | wake_up_interruptible(&fmdev->rx.rds.read_queue); |
1602 | ||
1603 | tasklet_kill(&fmdev->tx_task); | |
1604 | tasklet_kill(&fmdev->rx_task); | |
1605 | ||
1606 | skb_queue_purge(&fmdev->tx_q); | |
1607 | skb_queue_purge(&fmdev->rx_q); | |
1608 | ||
1609 | fmdev->resp_comp = NULL; | |
1610 | fmdev->rx.freq = 0; | |
1611 | ||
6705a9cc MH |
1612 | memset(&fm_st_proto, 0, sizeof(fm_st_proto)); |
1613 | fm_st_proto.chnl_id = 0x08; | |
1614 | ||
1615 | ret = st_unregister(&fm_st_proto); | |
1616 | ||
e8454ff7 MH |
1617 | if (ret < 0) |
1618 | fmerr("Failed to de-register FM from ST %d\n", ret); | |
1619 | else | |
1620 | fmdbg("Successfully unregistered from ST\n"); | |
1621 | ||
1622 | clear_bit(FM_CORE_READY, &fmdev->flag); | |
1623 | return ret; | |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | * Module init function. Ask FM V4L module to register video device. | |
1628 | * Allocate memory for FM driver context and RX RDS buffer. | |
1629 | */ | |
1630 | static int __init fm_drv_init(void) | |
1631 | { | |
1632 | struct fmdev *fmdev = NULL; | |
a6127803 | 1633 | int ret = -ENOMEM; |
e8454ff7 MH |
1634 | |
1635 | fmdbg("FM driver version %s\n", FM_DRV_VERSION); | |
1636 | ||
1637 | fmdev = kzalloc(sizeof(struct fmdev), GFP_KERNEL); | |
1638 | if (NULL == fmdev) { | |
1639 | fmerr("Can't allocate operation structure memory\n"); | |
1640 | return ret; | |
1641 | } | |
1642 | fmdev->rx.rds.buf_size = default_rds_buf * FM_RDS_BLK_SIZE; | |
1643 | fmdev->rx.rds.buff = kzalloc(fmdev->rx.rds.buf_size, GFP_KERNEL); | |
1644 | if (NULL == fmdev->rx.rds.buff) { | |
1645 | fmerr("Can't allocate rds ring buffer\n"); | |
1646 | goto rel_dev; | |
1647 | } | |
1648 | ||
1649 | ret = fm_v4l2_init_video_device(fmdev, radio_nr); | |
1650 | if (ret < 0) | |
1651 | goto rel_rdsbuf; | |
1652 | ||
1653 | fmdev->irq_info.handlers = int_handler_table; | |
1654 | fmdev->curr_fmmode = FM_MODE_OFF; | |
1655 | fmdev->tx_data.pwr_lvl = FM_PWR_LVL_DEF; | |
1656 | fmdev->tx_data.preemph = FM_TX_PREEMPH_50US; | |
1657 | return ret; | |
1658 | ||
1659 | rel_rdsbuf: | |
1660 | kfree(fmdev->rx.rds.buff); | |
1661 | rel_dev: | |
1662 | kfree(fmdev); | |
1663 | ||
1664 | return ret; | |
1665 | } | |
1666 | ||
1667 | /* Module exit function. Ask FM V4L module to unregister video device */ | |
1668 | static void __exit fm_drv_exit(void) | |
1669 | { | |
1670 | struct fmdev *fmdev = NULL; | |
1671 | ||
1672 | fmdev = fm_v4l2_deinit_video_device(); | |
1673 | if (fmdev != NULL) { | |
1674 | kfree(fmdev->rx.rds.buff); | |
1675 | kfree(fmdev); | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | module_init(fm_drv_init); | |
1680 | module_exit(fm_drv_exit); | |
1681 | ||
1682 | /* ------------- Module Info ------------- */ | |
1683 | MODULE_AUTHOR("Manjunatha Halli <manjunatha_halli@ti.com>"); | |
1684 | MODULE_DESCRIPTION("FM Driver for TI's Connectivity chip. " FM_DRV_VERSION); | |
1685 | MODULE_VERSION(FM_DRV_VERSION); | |
1686 | MODULE_LICENSE("GPL"); |