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 | |
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 | |
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 | |
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 | |
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 | |
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, type: 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, mode: 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, type: 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 | |
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, rds_en_dis: 0); |
147 | |
148 | /* Set RDS length */ |
149 | set_rds_len(fmdev, type: 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, mode: 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 | |
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 | |
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 | |
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 */ |
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 */ |
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(x: &fmdev->maintask_comp); |
264 | timeleft = wait_for_completion_timeout(x: &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, addr: &fmdev->flag); |
273 | tx->xmit_state = new_xmit_state; |
274 | |
275 | return 0; |
276 | } |
277 | |
278 | /* Set TX power level */ |
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 | */ |
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.*/ |
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 */ |
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, new_xmit_state: 0); |
378 | clear_bit(FM_CORE_TX_XMITING, addr: &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, new_pwr_lvl: tx->pwr_lvl); |
401 | fm_tx_set_preemph_filter(fmdev, preemphasis: tx->preemph); |
402 | |
403 | tx->audio_io = 0x01; /* I2S */ |
404 | set_audio_io(fmdev); |
405 | |
406 | enable_xmit(fmdev, new_xmit_state: 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 | |