1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * FM Driver for Connectivity chip of Texas Instruments.
4 * This sub-module of FM driver implements FM TX functionality.
5 *
6 * Copyright (C) 2011 Texas Instruments
7 */
8
9 #include <linux/delay.h>
10 #include "fmdrv.h"
11 #include "fmdrv_common.h"
12 #include "fmdrv_tx.h"
13
fm_tx_set_stereo_mono(struct fmdev * fmdev,u16 mode)14 int fm_tx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
15 {
16 u16 payload;
17 int ret;
18
19 if (fmdev->tx_data.aud_mode == mode)
20 return 0;
21
22 fmdbg("stereo mode: %d\n", mode);
23
24 /* Set Stereo/Mono mode */
25 payload = (1 - mode);
26 ret = fmc_send_cmd(fmdev, MONO_SET, REG_WR, &payload,
27 sizeof(payload), NULL, NULL);
28 if (ret < 0)
29 return ret;
30
31 fmdev->tx_data.aud_mode = mode;
32
33 return ret;
34 }
35
set_rds_text(struct fmdev * fmdev,u8 * rds_text)36 static int set_rds_text(struct fmdev *fmdev, u8 *rds_text)
37 {
38 u16 payload;
39 int ret;
40
41 ret = fmc_send_cmd(fmdev, RDS_DATA_SET, REG_WR, rds_text,
42 strlen(rds_text), NULL, NULL);
43 if (ret < 0)
44 return ret;
45
46 /* Scroll mode */
47 payload = (u16)0x1;
48 ret = fmc_send_cmd(fmdev, DISPLAY_MODE, REG_WR, &payload,
49 sizeof(payload), NULL, NULL);
50 if (ret < 0)
51 return ret;
52
53 return 0;
54 }
55
set_rds_data_mode(struct fmdev * fmdev,u8 mode)56 static int set_rds_data_mode(struct fmdev *fmdev, u8 mode)
57 {
58 u16 payload;
59 int ret;
60
61 /* Setting unique PI TODO: how unique? */
62 payload = (u16)0xcafe;
63 ret = fmc_send_cmd(fmdev, PI_SET, REG_WR, &payload,
64 sizeof(payload), NULL, NULL);
65 if (ret < 0)
66 return ret;
67
68 /* Set decoder id */
69 payload = (u16)0xa;
70 ret = fmc_send_cmd(fmdev, DI_SET, REG_WR, &payload,
71 sizeof(payload), NULL, NULL);
72 if (ret < 0)
73 return ret;
74
75 /* TODO: RDS_MODE_GET? */
76 return 0;
77 }
78
set_rds_len(struct fmdev * fmdev,u8 type,u16 len)79 static int set_rds_len(struct fmdev *fmdev, u8 type, u16 len)
80 {
81 u16 payload;
82 int ret;
83
84 len |= type << 8;
85 payload = len;
86 ret = fmc_send_cmd(fmdev, RDS_CONFIG_DATA_SET, REG_WR, &payload,
87 sizeof(payload), NULL, NULL);
88 if (ret < 0)
89 return ret;
90
91 /* TODO: LENGTH_GET? */
92 return 0;
93 }
94
fm_tx_set_rds_mode(struct fmdev * fmdev,u8 rds_en_dis)95 int fm_tx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
96 {
97 u16 payload;
98 int ret;
99 u8 rds_text[] = "Zoom2\n";
100
101 fmdbg("rds_en_dis:%d(E:%d, D:%d)\n", rds_en_dis,
102 FM_RDS_ENABLE, FM_RDS_DISABLE);
103
104 if (rds_en_dis == FM_RDS_ENABLE) {
105 /* Set RDS length */
106 set_rds_len(fmdev, 0, strlen(rds_text));
107
108 /* Set RDS text */
109 set_rds_text(fmdev, rds_text);
110
111 /* Set RDS mode */
112 set_rds_data_mode(fmdev, 0x0);
113 }
114
115 /* Send command to enable RDS */
116 if (rds_en_dis == FM_RDS_ENABLE)
117 payload = 0x01;
118 else
119 payload = 0x00;
120
121 ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
122 sizeof(payload), NULL, NULL);
123 if (ret < 0)
124 return ret;
125
126 if (rds_en_dis == FM_RDS_ENABLE) {
127 /* Set RDS length */
128 set_rds_len(fmdev, 0, strlen(rds_text));
129
130 /* Set RDS text */
131 set_rds_text(fmdev, rds_text);
132 }
133 fmdev->tx_data.rds.flag = rds_en_dis;
134
135 return 0;
136 }
137
fm_tx_set_radio_text(struct fmdev * fmdev,u8 * rds_text,u8 rds_type)138 int fm_tx_set_radio_text(struct fmdev *fmdev, u8 *rds_text, u8 rds_type)
139 {
140 u16 payload;
141 int ret;
142
143 if (fmdev->curr_fmmode != FM_MODE_TX)
144 return -EPERM;
145
146 fm_tx_set_rds_mode(fmdev, 0);
147
148 /* Set RDS length */
149 set_rds_len(fmdev, rds_type, strlen(rds_text));
150
151 /* Set RDS text */
152 set_rds_text(fmdev, rds_text);
153
154 /* Set RDS mode */
155 set_rds_data_mode(fmdev, 0x0);
156
157 payload = 1;
158 ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
159 sizeof(payload), NULL, NULL);
160 if (ret < 0)
161 return ret;
162
163 return 0;
164 }
165
fm_tx_set_af(struct fmdev * fmdev,u32 af)166 int fm_tx_set_af(struct fmdev *fmdev, u32 af)
167 {
168 u16 payload;
169 int ret;
170
171 if (fmdev->curr_fmmode != FM_MODE_TX)
172 return -EPERM;
173
174 fmdbg("AF: %d\n", af);
175
176 af = (af - 87500) / 100;
177 payload = (u16)af;
178 ret = fmc_send_cmd(fmdev, TA_SET, REG_WR, &payload,
179 sizeof(payload), NULL, NULL);
180 if (ret < 0)
181 return ret;
182
183 return 0;
184 }
185
fm_tx_set_region(struct fmdev * fmdev,u8 region)186 int fm_tx_set_region(struct fmdev *fmdev, u8 region)
187 {
188 u16 payload;
189 int ret;
190
191 if (region != FM_BAND_EUROPE_US && region != FM_BAND_JAPAN) {
192 fmerr("Invalid band\n");
193 return -EINVAL;
194 }
195
196 /* Send command to set the band */
197 payload = (u16)region;
198 ret = fmc_send_cmd(fmdev, TX_BAND_SET, REG_WR, &payload,
199 sizeof(payload), NULL, NULL);
200 if (ret < 0)
201 return ret;
202
203 return 0;
204 }
205
fm_tx_set_mute_mode(struct fmdev * fmdev,u8 mute_mode_toset)206 int fm_tx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
207 {
208 u16 payload;
209 int ret;
210
211 fmdbg("tx: mute mode %d\n", mute_mode_toset);
212
213 payload = mute_mode_toset;
214 ret = fmc_send_cmd(fmdev, MUTE, REG_WR, &payload,
215 sizeof(payload), NULL, NULL);
216 if (ret < 0)
217 return ret;
218
219 return 0;
220 }
221
222 /* Set TX Audio I/O */
set_audio_io(struct fmdev * fmdev)223 static int set_audio_io(struct fmdev *fmdev)
224 {
225 struct fmtx_data *tx = &fmdev->tx_data;
226 u16 payload;
227 int ret;
228
229 /* Set Audio I/O Enable */
230 payload = tx->audio_io;
231 ret = fmc_send_cmd(fmdev, AUDIO_IO_SET, REG_WR, &payload,
232 sizeof(payload), NULL, NULL);
233 if (ret < 0)
234 return ret;
235
236 /* TODO: is audio set? */
237 return 0;
238 }
239
240 /* Start TX Transmission */
enable_xmit(struct fmdev * fmdev,u8 new_xmit_state)241 static int enable_xmit(struct fmdev *fmdev, u8 new_xmit_state)
242 {
243 struct fmtx_data *tx = &fmdev->tx_data;
244 unsigned long timeleft;
245 u16 payload;
246 int ret;
247
248 /* Enable POWER_ENB interrupts */
249 payload = FM_POW_ENB_EVENT;
250 ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
251 sizeof(payload), NULL, NULL);
252 if (ret < 0)
253 return ret;
254
255 /* Set Power Enable */
256 payload = new_xmit_state;
257 ret = fmc_send_cmd(fmdev, POWER_ENB_SET, REG_WR, &payload,
258 sizeof(payload), NULL, NULL);
259 if (ret < 0)
260 return ret;
261
262 /* Wait for Power Enabled */
263 init_completion(&fmdev->maintask_comp);
264 timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
265 FM_DRV_TX_TIMEOUT);
266 if (!timeleft) {
267 fmerr("Timeout(%d sec),didn't get tune ended interrupt\n",
268 jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
269 return -ETIMEDOUT;
270 }
271
272 set_bit(FM_CORE_TX_XMITING, &fmdev->flag);
273 tx->xmit_state = new_xmit_state;
274
275 return 0;
276 }
277
278 /* Set TX power level */
fm_tx_set_pwr_lvl(struct fmdev * fmdev,u8 new_pwr_lvl)279 int fm_tx_set_pwr_lvl(struct fmdev *fmdev, u8 new_pwr_lvl)
280 {
281 u16 payload;
282 struct fmtx_data *tx = &fmdev->tx_data;
283 int ret;
284
285 if (fmdev->curr_fmmode != FM_MODE_TX)
286 return -EPERM;
287 fmdbg("tx: pwr_level_to_set %ld\n", (long int)new_pwr_lvl);
288
289 /* If the core isn't ready update global variable */
290 if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
291 tx->pwr_lvl = new_pwr_lvl;
292 return 0;
293 }
294
295 /* Set power level: Application will specify power level value in
296 * units of dB/uV, whereas range and step are specific to FM chip.
297 * For TI's WL chips, convert application specified power level value
298 * to chip specific value by subtracting 122 from it. Refer to TI FM
299 * data sheet for details.
300 * */
301
302 payload = (FM_PWR_LVL_HIGH - new_pwr_lvl);
303 ret = fmc_send_cmd(fmdev, POWER_LEV_SET, REG_WR, &payload,
304 sizeof(payload), NULL, NULL);
305 if (ret < 0)
306 return ret;
307
308 /* TODO: is the power level set? */
309 tx->pwr_lvl = new_pwr_lvl;
310
311 return 0;
312 }
313
314 /*
315 * Sets FM TX pre-emphasis filter value (OFF, 50us, or 75us)
316 * Convert V4L2 specified filter values to chip specific filter values.
317 */
fm_tx_set_preemph_filter(struct fmdev * fmdev,u32 preemphasis)318 int fm_tx_set_preemph_filter(struct fmdev *fmdev, u32 preemphasis)
319 {
320 struct fmtx_data *tx = &fmdev->tx_data;
321 u16 payload;
322 int ret;
323
324 if (fmdev->curr_fmmode != FM_MODE_TX)
325 return -EPERM;
326
327 switch (preemphasis) {
328 case V4L2_PREEMPHASIS_DISABLED:
329 payload = FM_TX_PREEMPH_OFF;
330 break;
331 case V4L2_PREEMPHASIS_50_uS:
332 payload = FM_TX_PREEMPH_50US;
333 break;
334 case V4L2_PREEMPHASIS_75_uS:
335 payload = FM_TX_PREEMPH_75US;
336 break;
337 }
338
339 ret = fmc_send_cmd(fmdev, PREMPH_SET, REG_WR, &payload,
340 sizeof(payload), NULL, NULL);
341 if (ret < 0)
342 return ret;
343
344 tx->preemph = payload;
345
346 return ret;
347 }
348
349 /* Get the TX tuning capacitor value.*/
fm_tx_get_tune_cap_val(struct fmdev * fmdev)350 int fm_tx_get_tune_cap_val(struct fmdev *fmdev)
351 {
352 u16 curr_val;
353 u32 resp_len;
354 int ret;
355
356 if (fmdev->curr_fmmode != FM_MODE_TX)
357 return -EPERM;
358
359 ret = fmc_send_cmd(fmdev, READ_FMANT_TUNE_VALUE, REG_RD,
360 NULL, sizeof(curr_val), &curr_val, &resp_len);
361 if (ret < 0)
362 return ret;
363
364 curr_val = be16_to_cpu((__force __be16)curr_val);
365
366 return curr_val;
367 }
368
369 /* Set TX Frequency */
fm_tx_set_freq(struct fmdev * fmdev,u32 freq_to_set)370 int fm_tx_set_freq(struct fmdev *fmdev, u32 freq_to_set)
371 {
372 struct fmtx_data *tx = &fmdev->tx_data;
373 u16 payload, chanl_index;
374 int ret;
375
376 if (test_bit(FM_CORE_TX_XMITING, &fmdev->flag)) {
377 enable_xmit(fmdev, 0);
378 clear_bit(FM_CORE_TX_XMITING, &fmdev->flag);
379 }
380
381 /* Enable FR, BL interrupts */
382 payload = (FM_FR_EVENT | FM_BL_EVENT);
383 ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
384 sizeof(payload), NULL, NULL);
385 if (ret < 0)
386 return ret;
387
388 tx->tx_frq = (unsigned long)freq_to_set;
389 fmdbg("tx: freq_to_set %ld\n", (long int)tx->tx_frq);
390
391 chanl_index = freq_to_set / 10;
392
393 /* Set current tuner channel */
394 payload = chanl_index;
395 ret = fmc_send_cmd(fmdev, CHANL_SET, REG_WR, &payload,
396 sizeof(payload), NULL, NULL);
397 if (ret < 0)
398 return ret;
399
400 fm_tx_set_pwr_lvl(fmdev, tx->pwr_lvl);
401 fm_tx_set_preemph_filter(fmdev, tx->preemph);
402
403 tx->audio_io = 0x01; /* I2S */
404 set_audio_io(fmdev);
405
406 enable_xmit(fmdev, 0x01); /* Enable transmission */
407
408 tx->aud_mode = FM_STEREO_MODE;
409 tx->rds.flag = FM_RDS_DISABLE;
410
411 return 0;
412 }
413
414