1/*
2 * adv7393 - ADV7393 Video Encoder Driver
3 *
4 * The encoder hardware does not support SECAM.
5 *
6 * Copyright (C) 2010-2012 ADVANSEE - http://www.advansee.com/
7 * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
8 *
9 * Based on ADV7343 driver,
10 *
11 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation version 2.
16 *
17 * This program is distributed .as is. WITHOUT ANY WARRANTY of any
18 * kind, whether express or implied; without even the implied warranty
19 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 * GNU General Public License for more details.
21 */
22
23#include <linux/kernel.h>
24#include <linux/init.h>
25#include <linux/ctype.h>
26#include <linux/slab.h>
27#include <linux/i2c.h>
28#include <linux/device.h>
29#include <linux/delay.h>
30#include <linux/module.h>
31#include <linux/videodev2.h>
32#include <linux/uaccess.h>
33
34#include <media/adv7393.h>
35#include <media/v4l2-device.h>
36#include <media/v4l2-ctrls.h>
37
38#include "adv7393_regs.h"
39
40MODULE_DESCRIPTION("ADV7393 video encoder driver");
41MODULE_LICENSE("GPL");
42
43static bool debug;
44module_param(debug, bool, 0644);
45MODULE_PARM_DESC(debug, "Debug level 0-1");
46
47struct adv7393_state {
48	struct v4l2_subdev sd;
49	struct v4l2_ctrl_handler hdl;
50	u8 reg00;
51	u8 reg01;
52	u8 reg02;
53	u8 reg35;
54	u8 reg80;
55	u8 reg82;
56	u32 output;
57	v4l2_std_id std;
58};
59
60static inline struct adv7393_state *to_state(struct v4l2_subdev *sd)
61{
62	return container_of(sd, struct adv7393_state, sd);
63}
64
65static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
66{
67	return &container_of(ctrl->handler, struct adv7393_state, hdl)->sd;
68}
69
70static inline int adv7393_write(struct v4l2_subdev *sd, u8 reg, u8 value)
71{
72	struct i2c_client *client = v4l2_get_subdevdata(sd);
73
74	return i2c_smbus_write_byte_data(client, reg, value);
75}
76
77static const u8 adv7393_init_reg_val[] = {
78	ADV7393_SOFT_RESET, ADV7393_SOFT_RESET_DEFAULT,
79	ADV7393_POWER_MODE_REG, ADV7393_POWER_MODE_REG_DEFAULT,
80
81	ADV7393_HD_MODE_REG1, ADV7393_HD_MODE_REG1_DEFAULT,
82	ADV7393_HD_MODE_REG2, ADV7393_HD_MODE_REG2_DEFAULT,
83	ADV7393_HD_MODE_REG3, ADV7393_HD_MODE_REG3_DEFAULT,
84	ADV7393_HD_MODE_REG4, ADV7393_HD_MODE_REG4_DEFAULT,
85	ADV7393_HD_MODE_REG5, ADV7393_HD_MODE_REG5_DEFAULT,
86	ADV7393_HD_MODE_REG6, ADV7393_HD_MODE_REG6_DEFAULT,
87	ADV7393_HD_MODE_REG7, ADV7393_HD_MODE_REG7_DEFAULT,
88
89	ADV7393_SD_MODE_REG1, ADV7393_SD_MODE_REG1_DEFAULT,
90	ADV7393_SD_MODE_REG2, ADV7393_SD_MODE_REG2_DEFAULT,
91	ADV7393_SD_MODE_REG3, ADV7393_SD_MODE_REG3_DEFAULT,
92	ADV7393_SD_MODE_REG4, ADV7393_SD_MODE_REG4_DEFAULT,
93	ADV7393_SD_MODE_REG5, ADV7393_SD_MODE_REG5_DEFAULT,
94	ADV7393_SD_MODE_REG6, ADV7393_SD_MODE_REG6_DEFAULT,
95	ADV7393_SD_MODE_REG7, ADV7393_SD_MODE_REG7_DEFAULT,
96	ADV7393_SD_MODE_REG8, ADV7393_SD_MODE_REG8_DEFAULT,
97
98	ADV7393_SD_TIMING_REG0, ADV7393_SD_TIMING_REG0_DEFAULT,
99
100	ADV7393_SD_HUE_ADJUST, ADV7393_SD_HUE_ADJUST_DEFAULT,
101	ADV7393_SD_CGMS_WSS0, ADV7393_SD_CGMS_WSS0_DEFAULT,
102	ADV7393_SD_BRIGHTNESS_WSS, ADV7393_SD_BRIGHTNESS_WSS_DEFAULT,
103};
104
105/*
106 * 			    2^32
107 * FSC(reg) =  FSC (HZ) * --------
108 *			  27000000
109 */
110static const struct adv7393_std_info stdinfo[] = {
111	{
112		/* FSC(Hz) = 4,433,618.75 Hz */
113		SD_STD_NTSC, 705268427, V4L2_STD_NTSC_443,
114	}, {
115		/* FSC(Hz) = 3,579,545.45 Hz */
116		SD_STD_NTSC, 569408542, V4L2_STD_NTSC,
117	}, {
118		/* FSC(Hz) = 3,575,611.00 Hz */
119		SD_STD_PAL_M, 568782678, V4L2_STD_PAL_M,
120	}, {
121		/* FSC(Hz) = 3,582,056.00 Hz */
122		SD_STD_PAL_N, 569807903, V4L2_STD_PAL_Nc,
123	}, {
124		/* FSC(Hz) = 4,433,618.75 Hz */
125		SD_STD_PAL_N, 705268427, V4L2_STD_PAL_N,
126	}, {
127		/* FSC(Hz) = 4,433,618.75 Hz */
128		SD_STD_PAL_M, 705268427, V4L2_STD_PAL_60,
129	}, {
130		/* FSC(Hz) = 4,433,618.75 Hz */
131		SD_STD_PAL_BDGHI, 705268427, V4L2_STD_PAL,
132	},
133};
134
135static int adv7393_setstd(struct v4l2_subdev *sd, v4l2_std_id std)
136{
137	struct adv7393_state *state = to_state(sd);
138	const struct adv7393_std_info *std_info;
139	int num_std;
140	u8 reg;
141	u32 val;
142	int err = 0;
143	int i;
144
145	num_std = ARRAY_SIZE(stdinfo);
146
147	for (i = 0; i < num_std; i++) {
148		if (stdinfo[i].stdid & std)
149			break;
150	}
151
152	if (i == num_std) {
153		v4l2_dbg(1, debug, sd,
154				"Invalid std or std is not supported: %llx\n",
155						(unsigned long long)std);
156		return -EINVAL;
157	}
158
159	std_info = &stdinfo[i];
160
161	/* Set the standard */
162	val = state->reg80 & ~SD_STD_MASK;
163	val |= std_info->standard_val3;
164	err = adv7393_write(sd, ADV7393_SD_MODE_REG1, val);
165	if (err < 0)
166		goto setstd_exit;
167
168	state->reg80 = val;
169
170	/* Configure the input mode register */
171	val = state->reg01 & ~INPUT_MODE_MASK;
172	val |= SD_INPUT_MODE;
173	err = adv7393_write(sd, ADV7393_MODE_SELECT_REG, val);
174	if (err < 0)
175		goto setstd_exit;
176
177	state->reg01 = val;
178
179	/* Program the sub carrier frequency registers */
180	val = std_info->fsc_val;
181	for (reg = ADV7393_FSC_REG0; reg <= ADV7393_FSC_REG3; reg++) {
182		err = adv7393_write(sd, reg, val);
183		if (err < 0)
184			goto setstd_exit;
185		val >>= 8;
186	}
187
188	val = state->reg82;
189
190	/* Pedestal settings */
191	if (std & (V4L2_STD_NTSC | V4L2_STD_NTSC_443))
192		val |= SD_PEDESTAL_EN;
193	else
194		val &= SD_PEDESTAL_DI;
195
196	err = adv7393_write(sd, ADV7393_SD_MODE_REG2, val);
197	if (err < 0)
198		goto setstd_exit;
199
200	state->reg82 = val;
201
202setstd_exit:
203	if (err != 0)
204		v4l2_err(sd, "Error setting std, write failed\n");
205
206	return err;
207}
208
209static int adv7393_setoutput(struct v4l2_subdev *sd, u32 output_type)
210{
211	struct adv7393_state *state = to_state(sd);
212	u8 val;
213	int err = 0;
214
215	if (output_type > ADV7393_SVIDEO_ID) {
216		v4l2_dbg(1, debug, sd,
217			"Invalid output type or output type not supported:%d\n",
218								output_type);
219		return -EINVAL;
220	}
221
222	/* Enable Appropriate DAC */
223	val = state->reg00 & 0x03;
224
225	if (output_type == ADV7393_COMPOSITE_ID)
226		val |= ADV7393_COMPOSITE_POWER_VALUE;
227	else if (output_type == ADV7393_COMPONENT_ID)
228		val |= ADV7393_COMPONENT_POWER_VALUE;
229	else
230		val |= ADV7393_SVIDEO_POWER_VALUE;
231
232	err = adv7393_write(sd, ADV7393_POWER_MODE_REG, val);
233	if (err < 0)
234		goto setoutput_exit;
235
236	state->reg00 = val;
237
238	/* Enable YUV output */
239	val = state->reg02 | YUV_OUTPUT_SELECT;
240	err = adv7393_write(sd, ADV7393_MODE_REG0, val);
241	if (err < 0)
242		goto setoutput_exit;
243
244	state->reg02 = val;
245
246	/* configure SD DAC Output 1 bit */
247	val = state->reg82;
248	if (output_type == ADV7393_COMPONENT_ID)
249		val &= SD_DAC_OUT1_DI;
250	else
251		val |= SD_DAC_OUT1_EN;
252	err = adv7393_write(sd, ADV7393_SD_MODE_REG2, val);
253	if (err < 0)
254		goto setoutput_exit;
255
256	state->reg82 = val;
257
258	/* configure ED/HD Color DAC Swap bit to zero */
259	val = state->reg35 & HD_DAC_SWAP_DI;
260	err = adv7393_write(sd, ADV7393_HD_MODE_REG6, val);
261	if (err < 0)
262		goto setoutput_exit;
263
264	state->reg35 = val;
265
266setoutput_exit:
267	if (err != 0)
268		v4l2_err(sd, "Error setting output, write failed\n");
269
270	return err;
271}
272
273static int adv7393_log_status(struct v4l2_subdev *sd)
274{
275	struct adv7393_state *state = to_state(sd);
276
277	v4l2_info(sd, "Standard: %llx\n", (unsigned long long)state->std);
278	v4l2_info(sd, "Output: %s\n", (state->output == 0) ? "Composite" :
279			((state->output == 1) ? "Component" : "S-Video"));
280	return 0;
281}
282
283static int adv7393_s_ctrl(struct v4l2_ctrl *ctrl)
284{
285	struct v4l2_subdev *sd = to_sd(ctrl);
286
287	switch (ctrl->id) {
288	case V4L2_CID_BRIGHTNESS:
289		return adv7393_write(sd, ADV7393_SD_BRIGHTNESS_WSS,
290					ctrl->val & SD_BRIGHTNESS_VALUE_MASK);
291
292	case V4L2_CID_HUE:
293		return adv7393_write(sd, ADV7393_SD_HUE_ADJUST,
294					ctrl->val - ADV7393_HUE_MIN);
295
296	case V4L2_CID_GAIN:
297		return adv7393_write(sd, ADV7393_DAC123_OUTPUT_LEVEL,
298					ctrl->val);
299	}
300	return -EINVAL;
301}
302
303static const struct v4l2_ctrl_ops adv7393_ctrl_ops = {
304	.s_ctrl = adv7393_s_ctrl,
305};
306
307static const struct v4l2_subdev_core_ops adv7393_core_ops = {
308	.log_status = adv7393_log_status,
309	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
310	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
311	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
312	.g_ctrl = v4l2_subdev_g_ctrl,
313	.s_ctrl = v4l2_subdev_s_ctrl,
314	.queryctrl = v4l2_subdev_queryctrl,
315	.querymenu = v4l2_subdev_querymenu,
316};
317
318static int adv7393_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
319{
320	struct adv7393_state *state = to_state(sd);
321	int err = 0;
322
323	if (state->std == std)
324		return 0;
325
326	err = adv7393_setstd(sd, std);
327	if (!err)
328		state->std = std;
329
330	return err;
331}
332
333static int adv7393_s_routing(struct v4l2_subdev *sd,
334		u32 input, u32 output, u32 config)
335{
336	struct adv7393_state *state = to_state(sd);
337	int err = 0;
338
339	if (state->output == output)
340		return 0;
341
342	err = adv7393_setoutput(sd, output);
343	if (!err)
344		state->output = output;
345
346	return err;
347}
348
349static const struct v4l2_subdev_video_ops adv7393_video_ops = {
350	.s_std_output	= adv7393_s_std_output,
351	.s_routing	= adv7393_s_routing,
352};
353
354static const struct v4l2_subdev_ops adv7393_ops = {
355	.core	= &adv7393_core_ops,
356	.video	= &adv7393_video_ops,
357};
358
359static int adv7393_initialize(struct v4l2_subdev *sd)
360{
361	struct adv7393_state *state = to_state(sd);
362	int err = 0;
363	int i;
364
365	for (i = 0; i < ARRAY_SIZE(adv7393_init_reg_val); i += 2) {
366
367		err = adv7393_write(sd, adv7393_init_reg_val[i],
368					adv7393_init_reg_val[i+1]);
369		if (err) {
370			v4l2_err(sd, "Error initializing\n");
371			return err;
372		}
373	}
374
375	/* Configure for default video standard */
376	err = adv7393_setoutput(sd, state->output);
377	if (err < 0) {
378		v4l2_err(sd, "Error setting output during init\n");
379		return -EINVAL;
380	}
381
382	err = adv7393_setstd(sd, state->std);
383	if (err < 0) {
384		v4l2_err(sd, "Error setting std during init\n");
385		return -EINVAL;
386	}
387
388	return err;
389}
390
391static int adv7393_probe(struct i2c_client *client,
392				const struct i2c_device_id *id)
393{
394	struct adv7393_state *state;
395	int err;
396
397	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
398		return -ENODEV;
399
400	v4l_info(client, "chip found @ 0x%x (%s)\n",
401			client->addr << 1, client->adapter->name);
402
403	state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
404	if (state == NULL)
405		return -ENOMEM;
406
407	state->reg00	= ADV7393_POWER_MODE_REG_DEFAULT;
408	state->reg01	= 0x00;
409	state->reg02	= 0x20;
410	state->reg35	= ADV7393_HD_MODE_REG6_DEFAULT;
411	state->reg80	= ADV7393_SD_MODE_REG1_DEFAULT;
412	state->reg82	= ADV7393_SD_MODE_REG2_DEFAULT;
413
414	state->output = ADV7393_COMPOSITE_ID;
415	state->std = V4L2_STD_NTSC;
416
417	v4l2_i2c_subdev_init(&state->sd, client, &adv7393_ops);
418
419	v4l2_ctrl_handler_init(&state->hdl, 3);
420	v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
421			V4L2_CID_BRIGHTNESS, ADV7393_BRIGHTNESS_MIN,
422					     ADV7393_BRIGHTNESS_MAX, 1,
423					     ADV7393_BRIGHTNESS_DEF);
424	v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
425			V4L2_CID_HUE, ADV7393_HUE_MIN,
426				      ADV7393_HUE_MAX, 1,
427				      ADV7393_HUE_DEF);
428	v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
429			V4L2_CID_GAIN, ADV7393_GAIN_MIN,
430				       ADV7393_GAIN_MAX, 1,
431				       ADV7393_GAIN_DEF);
432	state->sd.ctrl_handler = &state->hdl;
433	if (state->hdl.error) {
434		int err = state->hdl.error;
435
436		v4l2_ctrl_handler_free(&state->hdl);
437		return err;
438	}
439	v4l2_ctrl_handler_setup(&state->hdl);
440
441	err = adv7393_initialize(&state->sd);
442	if (err)
443		v4l2_ctrl_handler_free(&state->hdl);
444	return err;
445}
446
447static int adv7393_remove(struct i2c_client *client)
448{
449	struct v4l2_subdev *sd = i2c_get_clientdata(client);
450	struct adv7393_state *state = to_state(sd);
451
452	v4l2_device_unregister_subdev(sd);
453	v4l2_ctrl_handler_free(&state->hdl);
454
455	return 0;
456}
457
458static const struct i2c_device_id adv7393_id[] = {
459	{"adv7393", 0},
460	{},
461};
462MODULE_DEVICE_TABLE(i2c, adv7393_id);
463
464static struct i2c_driver adv7393_driver = {
465	.driver = {
466		.owner	= THIS_MODULE,
467		.name	= "adv7393",
468	},
469	.probe		= adv7393_probe,
470	.remove		= adv7393_remove,
471	.id_table	= adv7393_id,
472};
473module_i2c_driver(adv7393_driver);
474