1 /*
2 * FM Driver for Connectivity chip of Texas Instruments.
3 * This sub-module of FM driver implements FM TX functionality.
4 *
5 * Copyright (C) 2011 Texas Instruments
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18 #include <linux/delay.h>
19 #include "fmdrv.h"
20 #include "fmdrv_common.h"
21 #include "fmdrv_tx.h"
22
fm_tx_set_stereo_mono(struct fmdev * fmdev,u16 mode)23 int fm_tx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
24 {
25 u16 payload;
26 int ret;
27
28 if (fmdev->tx_data.aud_mode == mode)
29 return 0;
30
31 fmdbg("stereo mode: %d\n", mode);
32
33 /* Set Stereo/Mono mode */
34 payload = (1 - mode);
35 ret = fmc_send_cmd(fmdev, MONO_SET, REG_WR, &payload,
36 sizeof(payload), NULL, NULL);
37 if (ret < 0)
38 return ret;
39
40 fmdev->tx_data.aud_mode = mode;
41
42 return ret;
43 }
44
set_rds_text(struct fmdev * fmdev,u8 * rds_text)45 static int set_rds_text(struct fmdev *fmdev, u8 *rds_text)
46 {
47 u16 payload;
48 int ret;
49
50 ret = fmc_send_cmd(fmdev, RDS_DATA_SET, REG_WR, rds_text,
51 strlen(rds_text), NULL, NULL);
52 if (ret < 0)
53 return ret;
54
55 /* Scroll mode */
56 payload = (u16)0x1;
57 ret = fmc_send_cmd(fmdev, DISPLAY_MODE, REG_WR, &payload,
58 sizeof(payload), NULL, NULL);
59 if (ret < 0)
60 return ret;
61
62 return 0;
63 }
64
set_rds_data_mode(struct fmdev * fmdev,u8 mode)65 static int set_rds_data_mode(struct fmdev *fmdev, u8 mode)
66 {
67 u16 payload;
68 int ret;
69
70 /* Setting unique PI TODO: how unique? */
71 payload = (u16)0xcafe;
72 ret = fmc_send_cmd(fmdev, PI_SET, REG_WR, &payload,
73 sizeof(payload), NULL, NULL);
74 if (ret < 0)
75 return ret;
76
77 /* Set decoder id */
78 payload = (u16)0xa;
79 ret = fmc_send_cmd(fmdev, DI_SET, REG_WR, &payload,
80 sizeof(payload), NULL, NULL);
81 if (ret < 0)
82 return ret;
83
84 /* TODO: RDS_MODE_GET? */
85 return 0;
86 }
87
set_rds_len(struct fmdev * fmdev,u8 type,u16 len)88 static int set_rds_len(struct fmdev *fmdev, u8 type, u16 len)
89 {
90 u16 payload;
91 int ret;
92
93 len |= type << 8;
94 payload = len;
95 ret = fmc_send_cmd(fmdev, RDS_CONFIG_DATA_SET, REG_WR, &payload,
96 sizeof(payload), NULL, NULL);
97 if (ret < 0)
98 return ret;
99
100 /* TODO: LENGTH_GET? */
101 return 0;
102 }
103
fm_tx_set_rds_mode(struct fmdev * fmdev,u8 rds_en_dis)104 int fm_tx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
105 {
106 u16 payload;
107 int ret;
108 u8 rds_text[] = "Zoom2\n";
109
110 fmdbg("rds_en_dis:%d(E:%d, D:%d)\n", rds_en_dis,
111 FM_RDS_ENABLE, FM_RDS_DISABLE);
112
113 if (rds_en_dis == FM_RDS_ENABLE) {
114 /* Set RDS length */
115 set_rds_len(fmdev, 0, strlen(rds_text));
116
117 /* Set RDS text */
118 set_rds_text(fmdev, rds_text);
119
120 /* Set RDS mode */
121 set_rds_data_mode(fmdev, 0x0);
122 }
123
124 /* Send command to enable RDS */
125 if (rds_en_dis == FM_RDS_ENABLE)
126 payload = 0x01;
127 else
128 payload = 0x00;
129
130 ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
131 sizeof(payload), NULL, NULL);
132 if (ret < 0)
133 return ret;
134
135 if (rds_en_dis == FM_RDS_ENABLE) {
136 /* Set RDS length */
137 set_rds_len(fmdev, 0, strlen(rds_text));
138
139 /* Set RDS text */
140 set_rds_text(fmdev, rds_text);
141 }
142 fmdev->tx_data.rds.flag = rds_en_dis;
143
144 return 0;
145 }
146
fm_tx_set_radio_text(struct fmdev * fmdev,u8 * rds_text,u8 rds_type)147 int fm_tx_set_radio_text(struct fmdev *fmdev, u8 *rds_text, u8 rds_type)
148 {
149 u16 payload;
150 int ret;
151
152 if (fmdev->curr_fmmode != FM_MODE_TX)
153 return -EPERM;
154
155 fm_tx_set_rds_mode(fmdev, 0);
156
157 /* Set RDS length */
158 set_rds_len(fmdev, rds_type, strlen(rds_text));
159
160 /* Set RDS text */
161 set_rds_text(fmdev, rds_text);
162
163 /* Set RDS mode */
164 set_rds_data_mode(fmdev, 0x0);
165
166 payload = 1;
167 ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
168 sizeof(payload), NULL, NULL);
169 if (ret < 0)
170 return ret;
171
172 return 0;
173 }
174
fm_tx_set_af(struct fmdev * fmdev,u32 af)175 int fm_tx_set_af(struct fmdev *fmdev, u32 af)
176 {
177 u16 payload;
178 int ret;
179
180 if (fmdev->curr_fmmode != FM_MODE_TX)
181 return -EPERM;
182
183 fmdbg("AF: %d\n", af);
184
185 af = (af - 87500) / 100;
186 payload = (u16)af;
187 ret = fmc_send_cmd(fmdev, TA_SET, REG_WR, &payload,
188 sizeof(payload), NULL, NULL);
189 if (ret < 0)
190 return ret;
191
192 return 0;
193 }
194
fm_tx_set_region(struct fmdev * fmdev,u8 region)195 int fm_tx_set_region(struct fmdev *fmdev, u8 region)
196 {
197 u16 payload;
198 int ret;
199
200 if (region != FM_BAND_EUROPE_US && region != FM_BAND_JAPAN) {
201 fmerr("Invalid band\n");
202 return -EINVAL;
203 }
204
205 /* Send command to set the band */
206 payload = (u16)region;
207 ret = fmc_send_cmd(fmdev, TX_BAND_SET, REG_WR, &payload,
208 sizeof(payload), NULL, NULL);
209 if (ret < 0)
210 return ret;
211
212 return 0;
213 }
214
fm_tx_set_mute_mode(struct fmdev * fmdev,u8 mute_mode_toset)215 int fm_tx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
216 {
217 u16 payload;
218 int ret;
219
220 fmdbg("tx: mute mode %d\n", mute_mode_toset);
221
222 payload = mute_mode_toset;
223 ret = fmc_send_cmd(fmdev, MUTE, REG_WR, &payload,
224 sizeof(payload), NULL, NULL);
225 if (ret < 0)
226 return ret;
227
228 return 0;
229 }
230
231 /* Set TX Audio I/O */
set_audio_io(struct fmdev * fmdev)232 static int set_audio_io(struct fmdev *fmdev)
233 {
234 struct fmtx_data *tx = &fmdev->tx_data;
235 u16 payload;
236 int ret;
237
238 /* Set Audio I/O Enable */
239 payload = tx->audio_io;
240 ret = fmc_send_cmd(fmdev, AUDIO_IO_SET, REG_WR, &payload,
241 sizeof(payload), NULL, NULL);
242 if (ret < 0)
243 return ret;
244
245 /* TODO: is audio set? */
246 return 0;
247 }
248
249 /* Start TX Transmission */
enable_xmit(struct fmdev * fmdev,u8 new_xmit_state)250 static int enable_xmit(struct fmdev *fmdev, u8 new_xmit_state)
251 {
252 struct fmtx_data *tx = &fmdev->tx_data;
253 unsigned long timeleft;
254 u16 payload;
255 int ret;
256
257 /* Enable POWER_ENB interrupts */
258 payload = FM_POW_ENB_EVENT;
259 ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
260 sizeof(payload), NULL, NULL);
261 if (ret < 0)
262 return ret;
263
264 /* Set Power Enable */
265 payload = new_xmit_state;
266 ret = fmc_send_cmd(fmdev, POWER_ENB_SET, REG_WR, &payload,
267 sizeof(payload), NULL, NULL);
268 if (ret < 0)
269 return ret;
270
271 /* Wait for Power Enabled */
272 init_completion(&fmdev->maintask_comp);
273 timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
274 FM_DRV_TX_TIMEOUT);
275 if (!timeleft) {
276 fmerr("Timeout(%d sec),didn't get tune ended interrupt\n",
277 jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
278 return -ETIMEDOUT;
279 }
280
281 set_bit(FM_CORE_TX_XMITING, &fmdev->flag);
282 tx->xmit_state = new_xmit_state;
283
284 return 0;
285 }
286
287 /* Set TX power level */
fm_tx_set_pwr_lvl(struct fmdev * fmdev,u8 new_pwr_lvl)288 int fm_tx_set_pwr_lvl(struct fmdev *fmdev, u8 new_pwr_lvl)
289 {
290 u16 payload;
291 struct fmtx_data *tx = &fmdev->tx_data;
292 int ret;
293
294 if (fmdev->curr_fmmode != FM_MODE_TX)
295 return -EPERM;
296 fmdbg("tx: pwr_level_to_set %ld\n", (long int)new_pwr_lvl);
297
298 /* If the core isn't ready update global variable */
299 if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
300 tx->pwr_lvl = new_pwr_lvl;
301 return 0;
302 }
303
304 /* Set power level: Application will specify power level value in
305 * units of dB/uV, whereas range and step are specific to FM chip.
306 * For TI's WL chips, convert application specified power level value
307 * to chip specific value by subtracting 122 from it. Refer to TI FM
308 * data sheet for details.
309 * */
310
311 payload = (FM_PWR_LVL_HIGH - new_pwr_lvl);
312 ret = fmc_send_cmd(fmdev, POWER_LEV_SET, REG_WR, &payload,
313 sizeof(payload), NULL, NULL);
314 if (ret < 0)
315 return ret;
316
317 /* TODO: is the power level set? */
318 tx->pwr_lvl = new_pwr_lvl;
319
320 return 0;
321 }
322
323 /*
324 * Sets FM TX pre-emphasis filter value (OFF, 50us, or 75us)
325 * Convert V4L2 specified filter values to chip specific filter values.
326 */
fm_tx_set_preemph_filter(struct fmdev * fmdev,u32 preemphasis)327 int fm_tx_set_preemph_filter(struct fmdev *fmdev, u32 preemphasis)
328 {
329 struct fmtx_data *tx = &fmdev->tx_data;
330 u16 payload;
331 int ret;
332
333 if (fmdev->curr_fmmode != FM_MODE_TX)
334 return -EPERM;
335
336 switch (preemphasis) {
337 case V4L2_PREEMPHASIS_DISABLED:
338 payload = FM_TX_PREEMPH_OFF;
339 break;
340 case V4L2_PREEMPHASIS_50_uS:
341 payload = FM_TX_PREEMPH_50US;
342 break;
343 case V4L2_PREEMPHASIS_75_uS:
344 payload = FM_TX_PREEMPH_75US;
345 break;
346 }
347
348 ret = fmc_send_cmd(fmdev, PREMPH_SET, REG_WR, &payload,
349 sizeof(payload), NULL, NULL);
350 if (ret < 0)
351 return ret;
352
353 tx->preemph = payload;
354
355 return ret;
356 }
357
358 /* Get the TX tuning capacitor value.*/
fm_tx_get_tune_cap_val(struct fmdev * fmdev)359 int fm_tx_get_tune_cap_val(struct fmdev *fmdev)
360 {
361 u16 curr_val;
362 u32 resp_len;
363 int ret;
364
365 if (fmdev->curr_fmmode != FM_MODE_TX)
366 return -EPERM;
367
368 ret = fmc_send_cmd(fmdev, READ_FMANT_TUNE_VALUE, REG_RD,
369 NULL, sizeof(curr_val), &curr_val, &resp_len);
370 if (ret < 0)
371 return ret;
372
373 curr_val = be16_to_cpu((__force __be16)curr_val);
374
375 return curr_val;
376 }
377
378 /* Set TX Frequency */
fm_tx_set_freq(struct fmdev * fmdev,u32 freq_to_set)379 int fm_tx_set_freq(struct fmdev *fmdev, u32 freq_to_set)
380 {
381 struct fmtx_data *tx = &fmdev->tx_data;
382 u16 payload, chanl_index;
383 int ret;
384
385 if (test_bit(FM_CORE_TX_XMITING, &fmdev->flag)) {
386 enable_xmit(fmdev, 0);
387 clear_bit(FM_CORE_TX_XMITING, &fmdev->flag);
388 }
389
390 /* Enable FR, BL interrupts */
391 payload = (FM_FR_EVENT | FM_BL_EVENT);
392 ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
393 sizeof(payload), NULL, NULL);
394 if (ret < 0)
395 return ret;
396
397 tx->tx_frq = (unsigned long)freq_to_set;
398 fmdbg("tx: freq_to_set %ld\n", (long int)tx->tx_frq);
399
400 chanl_index = freq_to_set / 10;
401
402 /* Set current tuner channel */
403 payload = chanl_index;
404 ret = fmc_send_cmd(fmdev, CHANL_SET, REG_WR, &payload,
405 sizeof(payload), NULL, NULL);
406 if (ret < 0)
407 return ret;
408
409 fm_tx_set_pwr_lvl(fmdev, tx->pwr_lvl);
410 fm_tx_set_preemph_filter(fmdev, tx->preemph);
411
412 tx->audio_io = 0x01; /* I2S */
413 set_audio_io(fmdev);
414
415 enable_xmit(fmdev, 0x01); /* Enable transmission */
416
417 tx->aud_mode = FM_STEREO_MODE;
418 tx->rds.flag = FM_RDS_DISABLE;
419
420 return 0;
421 }
422
423