1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2005-2006 Micronas USA Inc.
4 */
5
6#include <linux/module.h>
7#include <linux/init.h>
8#include <linux/i2c.h>
9#include <linux/videodev2.h>
10#include <media/tuner.h>
11#include <media/v4l2-common.h>
12#include <media/v4l2-ioctl.h>
13#include <media/v4l2-device.h>
14#include <linux/slab.h>
15
16MODULE_DESCRIPTION("sony-btf-mpx driver");
17MODULE_LICENSE("GPL v2");
18
19static int debug;
20module_param(debug, int, 0644);
21MODULE_PARM_DESC(debug, "debug level 0=off(default) 1=on");
22
23/* #define MPX_DEBUG */
24
25/*
26 * Note:
27 *
28 * AS(IF/MPX) pin:      LOW      HIGH/OPEN
29 * IF/MPX address:   0x42/0x40   0x43/0x44
30 */
31
32
33static int force_mpx_mode = -1;
34module_param(force_mpx_mode, int, 0644);
35
36struct sony_btf_mpx {
37	struct v4l2_subdev sd;
38	int mpxmode;
39	u32 audmode;
40};
41
42static inline struct sony_btf_mpx *to_state(struct v4l2_subdev *sd)
43{
44	return container_of(sd, struct sony_btf_mpx, sd);
45}
46
47static int mpx_write(struct i2c_client *client, int dev, int addr, int val)
48{
49	u8 buffer[5];
50	struct i2c_msg msg;
51
52	buffer[0] = dev;
53	buffer[1] = addr >> 8;
54	buffer[2] = addr & 0xff;
55	buffer[3] = val >> 8;
56	buffer[4] = val & 0xff;
57	msg.addr = client->addr;
58	msg.flags = 0;
59	msg.len = 5;
60	msg.buf = buffer;
61	i2c_transfer(client->adapter, &msg, 1);
62	return 0;
63}
64
65/*
66 * MPX register values for the BTF-PG472Z:
67 *
68 *                                 FM_     NICAM_  SCART_
69 *          MODUS  SOURCE    ACB   PRESCAL PRESCAL PRESCAL SYSTEM  VOLUME
70 *         10/0030 12/0008 12/0013 12/000E 12/0010 12/0000 10/0020 12/0000
71 *         ---------------------------------------------------------------
72 * Auto     1003    0020    0100    2603    5000    XXXX    0001    7500
73 *
74 * B/G
75 *  Mono    1003    0020    0100    2603    5000    XXXX    0003    7500
76 *  A2      1003    0020    0100    2601    5000    XXXX    0003    7500
77 *  NICAM   1003    0120    0100    2603    5000    XXXX    0008    7500
78 *
79 * I
80 *  Mono    1003    0020    0100    2603    7900    XXXX    000A    7500
81 *  NICAM   1003    0120    0100    2603    7900    XXXX    000A    7500
82 *
83 * D/K
84 *  Mono    1003    0020    0100    2603    5000    XXXX    0004    7500
85 *  A2-1    1003    0020    0100    2601    5000    XXXX    0004    7500
86 *  A2-2    1003    0020    0100    2601    5000    XXXX    0005    7500
87 *  A2-3    1003    0020    0100    2601    5000    XXXX    0007    7500
88 *  NICAM   1003    0120    0100    2603    5000    XXXX    000B    7500
89 *
90 * L/L'
91 *  Mono    0003    0200    0100    7C03    5000    2200    0009    7500
92 *  NICAM   0003    0120    0100    7C03    5000    XXXX    0009    7500
93 *
94 * M
95 *  Mono    1003    0200    0100    2B03    5000    2B00    0002    7500
96 *
97 * For Asia, replace the 0x26XX in FM_PRESCALE with 0x14XX.
98 *
99 * Bilingual selection in A2/NICAM:
100 *
101 *         High byte of SOURCE     Left chan   Right chan
102 *                 0x01              MAIN         SUB
103 *                 0x03              MAIN         MAIN
104 *                 0x04              SUB          SUB
105 *
106 * Force mono in NICAM by setting the high byte of SOURCE to 0x02 (L/L') or
107 * 0x00 (all other bands).  Force mono in A2 with FMONO_A2:
108 *
109 *                      FMONO_A2
110 *                      10/0022
111 *                      --------
112 *     Forced mono ON     07F0
113 *     Forced mono OFF    0190
114 */
115
116static const struct {
117	enum { AUD_MONO, AUD_A2, AUD_NICAM, AUD_NICAM_L } audio_mode;
118	u16 modus;
119	u16 source;
120	u16 acb;
121	u16 fm_prescale;
122	u16 nicam_prescale;
123	u16 scart_prescale;
124	u16 system;
125	u16 volume;
126} mpx_audio_modes[] = {
127	/* Auto */	{ AUD_MONO,	0x1003, 0x0020, 0x0100, 0x2603,
128					0x5000, 0x0000, 0x0001, 0x7500 },
129	/* B/G Mono */	{ AUD_MONO,	0x1003, 0x0020, 0x0100, 0x2603,
130					0x5000, 0x0000, 0x0003, 0x7500 },
131	/* B/G A2 */	{ AUD_A2,	0x1003, 0x0020, 0x0100, 0x2601,
132					0x5000, 0x0000, 0x0003, 0x7500 },
133	/* B/G NICAM */ { AUD_NICAM,	0x1003, 0x0120, 0x0100, 0x2603,
134					0x5000, 0x0000, 0x0008, 0x7500 },
135	/* I Mono */	{ AUD_MONO,	0x1003, 0x0020, 0x0100, 0x2603,
136					0x7900, 0x0000, 0x000A, 0x7500 },
137	/* I NICAM */	{ AUD_NICAM,	0x1003, 0x0120, 0x0100, 0x2603,
138					0x7900, 0x0000, 0x000A, 0x7500 },
139	/* D/K Mono */	{ AUD_MONO,	0x1003, 0x0020, 0x0100, 0x2603,
140					0x5000, 0x0000, 0x0004, 0x7500 },
141	/* D/K A2-1 */	{ AUD_A2,	0x1003, 0x0020, 0x0100, 0x2601,
142					0x5000, 0x0000, 0x0004, 0x7500 },
143	/* D/K A2-2 */	{ AUD_A2,	0x1003, 0x0020, 0x0100, 0x2601,
144					0x5000, 0x0000, 0x0005, 0x7500 },
145	/* D/K A2-3 */	{ AUD_A2,	0x1003, 0x0020, 0x0100, 0x2601,
146					0x5000, 0x0000, 0x0007, 0x7500 },
147	/* D/K NICAM */	{ AUD_NICAM,	0x1003, 0x0120, 0x0100, 0x2603,
148					0x5000, 0x0000, 0x000B, 0x7500 },
149	/* L/L' Mono */	{ AUD_MONO,	0x0003, 0x0200, 0x0100, 0x7C03,
150					0x5000, 0x2200, 0x0009, 0x7500 },
151	/* L/L' NICAM */{ AUD_NICAM_L,	0x0003, 0x0120, 0x0100, 0x7C03,
152					0x5000, 0x0000, 0x0009, 0x7500 },
153};
154
155#define MPX_NUM_MODES	ARRAY_SIZE(mpx_audio_modes)
156
157static int mpx_setup(struct sony_btf_mpx *t)
158{
159	struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
160	u16 source = 0;
161	u8 buffer[3];
162	struct i2c_msg msg;
163	int mode = t->mpxmode;
164
165	/* reset MPX */
166	buffer[0] = 0x00;
167	buffer[1] = 0x80;
168	buffer[2] = 0x00;
169	msg.addr = client->addr;
170	msg.flags = 0;
171	msg.len = 3;
172	msg.buf = buffer;
173	i2c_transfer(client->adapter, &msg, 1);
174	buffer[1] = 0x00;
175	i2c_transfer(client->adapter, &msg, 1);
176
177	if (t->audmode != V4L2_TUNER_MODE_MONO)
178		mode++;
179
180	if (mpx_audio_modes[mode].audio_mode != AUD_MONO) {
181		switch (t->audmode) {
182		case V4L2_TUNER_MODE_MONO:
183			switch (mpx_audio_modes[mode].audio_mode) {
184			case AUD_A2:
185				source = mpx_audio_modes[mode].source;
186				break;
187			case AUD_NICAM:
188				source = 0x0000;
189				break;
190			case AUD_NICAM_L:
191				source = 0x0200;
192				break;
193			default:
194				break;
195			}
196			break;
197		case V4L2_TUNER_MODE_STEREO:
198			source = mpx_audio_modes[mode].source;
199			break;
200		case V4L2_TUNER_MODE_LANG1:
201			source = 0x0300;
202			break;
203		case V4L2_TUNER_MODE_LANG2:
204			source = 0x0400;
205			break;
206		}
207		source |= mpx_audio_modes[mode].source & 0x00ff;
208	} else
209		source = mpx_audio_modes[mode].source;
210
211	mpx_write(client, 0x10, 0x0030, mpx_audio_modes[mode].modus);
212	mpx_write(client, 0x12, 0x0008, source);
213	mpx_write(client, 0x12, 0x0013, mpx_audio_modes[mode].acb);
214	mpx_write(client, 0x12, 0x000e,
215			mpx_audio_modes[mode].fm_prescale);
216	mpx_write(client, 0x12, 0x0010,
217			mpx_audio_modes[mode].nicam_prescale);
218	mpx_write(client, 0x12, 0x000d,
219			mpx_audio_modes[mode].scart_prescale);
220	mpx_write(client, 0x10, 0x0020, mpx_audio_modes[mode].system);
221	mpx_write(client, 0x12, 0x0000, mpx_audio_modes[mode].volume);
222	if (mpx_audio_modes[mode].audio_mode == AUD_A2)
223		mpx_write(client, 0x10, 0x0022,
224			t->audmode == V4L2_TUNER_MODE_MONO ? 0x07f0 : 0x0190);
225
226#ifdef MPX_DEBUG
227	{
228		u8 buf1[3], buf2[2];
229		struct i2c_msg msgs[2];
230
231		v4l2_info(client,
232			"MPX registers: %04x %04x %04x %04x %04x %04x %04x %04x\n",
233			mpx_audio_modes[mode].modus,
234			source,
235			mpx_audio_modes[mode].acb,
236			mpx_audio_modes[mode].fm_prescale,
237			mpx_audio_modes[mode].nicam_prescale,
238			mpx_audio_modes[mode].scart_prescale,
239			mpx_audio_modes[mode].system,
240			mpx_audio_modes[mode].volume);
241		buf1[0] = 0x11;
242		buf1[1] = 0x00;
243		buf1[2] = 0x7e;
244		msgs[0].addr = client->addr;
245		msgs[0].flags = 0;
246		msgs[0].len = 3;
247		msgs[0].buf = buf1;
248		msgs[1].addr = client->addr;
249		msgs[1].flags = I2C_M_RD;
250		msgs[1].len = 2;
251		msgs[1].buf = buf2;
252		i2c_transfer(client->adapter, msgs, 2);
253		v4l2_info(client, "MPX system: %02x%02x\n",
254				buf2[0], buf2[1]);
255		buf1[0] = 0x11;
256		buf1[1] = 0x02;
257		buf1[2] = 0x00;
258		i2c_transfer(client->adapter, msgs, 2);
259		v4l2_info(client, "MPX status: %02x%02x\n",
260				buf2[0], buf2[1]);
261	}
262#endif
263	return 0;
264}
265
266
267static int sony_btf_mpx_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
268{
269	struct sony_btf_mpx *t = to_state(sd);
270	int default_mpx_mode = 0;
271
272	if (std & V4L2_STD_PAL_BG)
273		default_mpx_mode = 1;
274	else if (std & V4L2_STD_PAL_I)
275		default_mpx_mode = 4;
276	else if (std & V4L2_STD_PAL_DK)
277		default_mpx_mode = 6;
278	else if (std & V4L2_STD_SECAM_L)
279		default_mpx_mode = 11;
280
281	if (default_mpx_mode != t->mpxmode) {
282		t->mpxmode = default_mpx_mode;
283		mpx_setup(t);
284	}
285	return 0;
286}
287
288static int sony_btf_mpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
289{
290	struct sony_btf_mpx *t = to_state(sd);
291
292	vt->capability = V4L2_TUNER_CAP_NORM |
293		V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 |
294		V4L2_TUNER_CAP_LANG2;
295	vt->rxsubchans = V4L2_TUNER_SUB_MONO |
296		V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_LANG1 |
297		V4L2_TUNER_SUB_LANG2;
298	vt->audmode = t->audmode;
299	return 0;
300}
301
302static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
303{
304	struct sony_btf_mpx *t = to_state(sd);
305
306	if (vt->type != V4L2_TUNER_ANALOG_TV)
307		return -EINVAL;
308
309	if (vt->audmode != t->audmode) {
310		t->audmode = vt->audmode;
311		mpx_setup(t);
312	}
313	return 0;
314}
315
316/* --------------------------------------------------------------------------*/
317
318static const struct v4l2_subdev_tuner_ops sony_btf_mpx_tuner_ops = {
319	.s_tuner = sony_btf_mpx_s_tuner,
320	.g_tuner = sony_btf_mpx_g_tuner,
321};
322
323static const struct v4l2_subdev_video_ops sony_btf_mpx_video_ops = {
324	.s_std = sony_btf_mpx_s_std,
325};
326
327static const struct v4l2_subdev_ops sony_btf_mpx_ops = {
328	.tuner = &sony_btf_mpx_tuner_ops,
329	.video = &sony_btf_mpx_video_ops,
330};
331
332/* --------------------------------------------------------------------------*/
333
334static int sony_btf_mpx_probe(struct i2c_client *client)
335{
336	struct sony_btf_mpx *t;
337	struct v4l2_subdev *sd;
338
339	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
340		return -ENODEV;
341
342	v4l_info(client, "chip found @ 0x%x (%s)\n",
343			client->addr << 1, client->adapter->name);
344
345	t = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
346	if (t == NULL)
347		return -ENOMEM;
348
349	sd = &t->sd;
350	v4l2_i2c_subdev_init(sd, client, &sony_btf_mpx_ops);
351
352	/* Initialize sony_btf_mpx */
353	t->mpxmode = 0;
354	t->audmode = V4L2_TUNER_MODE_STEREO;
355
356	return 0;
357}
358
359static void sony_btf_mpx_remove(struct i2c_client *client)
360{
361	struct v4l2_subdev *sd = i2c_get_clientdata(client);
362
363	v4l2_device_unregister_subdev(sd);
364}
365
366/* ----------------------------------------------------------------------- */
367
368static const struct i2c_device_id sony_btf_mpx_id[] = {
369	{ "sony-btf-mpx", 0 },
370	{ }
371};
372MODULE_DEVICE_TABLE(i2c, sony_btf_mpx_id);
373
374static struct i2c_driver sony_btf_mpx_driver = {
375	.driver = {
376		.name	= "sony-btf-mpx",
377	},
378	.probe = sony_btf_mpx_probe,
379	.remove = sony_btf_mpx_remove,
380	.id_table = sony_btf_mpx_id,
381};
382module_i2c_driver(sony_btf_mpx_driver);
383