1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 gpio functions.
4 Merging GPIO support into driver:
5 Copyright (C) 2004 Chris Kennedy <c@groovy.org>
6 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
7
8 */
9
10 #include "ivtv-driver.h"
11 #include "ivtv-cards.h"
12 #include "ivtv-gpio.h"
13 #include "tuner-xc2028.h"
14 #include <media/tuner.h>
15 #include <media/v4l2-ctrls.h>
16
17 /*
18 * GPIO assignment of Yuan MPG600/MPG160
19 *
20 * bit 15 14 13 12 | 11 10 9 8 | 7 6 5 4 | 3 2 1 0
21 * OUTPUT IN1 IN0 AM3 AM2 AM1 AM0
22 * INPUT DM1 DM0
23 *
24 * IN* : Input selection
25 * IN1 IN0
26 * 1 1 N/A
27 * 1 0 Line
28 * 0 1 N/A
29 * 0 0 Tuner
30 *
31 * AM* : Audio Mode
32 * AM3 0: Normal 1: Mixed(Sub+Main channel)
33 * AM2 0: Subchannel 1: Main channel
34 * AM1 0: Stereo 1: Mono
35 * AM0 0: Normal 1: Mute
36 *
37 * DM* : Detected tuner audio Mode
38 * DM1 0: Stereo 1: Mono
39 * DM0 0: Multiplex 1: Normal
40 *
41 * GPIO Initial Settings
42 * MPG600 MPG160
43 * DIR 0x3080 0x7080
44 * OUTPUT 0x000C 0x400C
45 *
46 * Special thanks to Makoto Iguchi <iguchi@tahoo.org> and Mr. Anonymous
47 * for analyzing GPIO of MPG160.
48 *
49 *****************************************************************************
50 *
51 * GPIO assignment of Avermedia M179 (per information direct from AVerMedia)
52 *
53 * bit 15 14 13 12 | 11 10 9 8 | 7 6 5 4 | 3 2 1 0
54 * OUTPUT IN0 AM0 IN1 AM1 AM2 IN2 BR0 BR1
55 * INPUT
56 *
57 * IN* : Input selection
58 * IN0 IN1 IN2
59 * * 1 * Mute
60 * 0 0 0 Line-In
61 * 1 0 0 TV Tuner Audio
62 * 0 0 1 FM Audio
63 * 1 0 1 Mute
64 *
65 * AM* : Audio Mode
66 * AM0 AM1 AM2
67 * 0 0 0 TV Tuner Audio: L_OUT=(L+R)/2, R_OUT=SAP
68 * 0 0 1 TV Tuner Audio: L_OUT=R_OUT=SAP (SAP)
69 * 0 1 0 TV Tuner Audio: L_OUT=L, R_OUT=R (stereo)
70 * 0 1 1 TV Tuner Audio: mute
71 * 1 * * TV Tuner Audio: L_OUT=R_OUT=(L+R)/2 (mono)
72 *
73 * BR* : Audio Sample Rate (BR stands for bitrate for some reason)
74 * BR0 BR1
75 * 0 0 32 kHz
76 * 0 1 44.1 kHz
77 * 1 0 48 kHz
78 *
79 * DM* : Detected tuner audio Mode
80 * Unknown currently
81 *
82 * Special thanks to AVerMedia Technologies, Inc. and Jiun-Kuei Jung at
83 * AVerMedia for providing the GPIO information used to add support
84 * for the M179 cards.
85 */
86
87 /********************* GPIO stuffs *********************/
88
89 /* GPIO registers */
90 #define IVTV_REG_GPIO_IN 0x9008
91 #define IVTV_REG_GPIO_OUT 0x900c
92 #define IVTV_REG_GPIO_DIR 0x9020
93
ivtv_reset_ir_gpio(struct ivtv * itv)94 void ivtv_reset_ir_gpio(struct ivtv *itv)
95 {
96 int curdir, curout;
97
98 if (itv->card->type != IVTV_CARD_PVR_150)
99 return;
100 IVTV_DEBUG_INFO("Resetting PVR150 IR\n");
101 curout = read_reg(IVTV_REG_GPIO_OUT);
102 curdir = read_reg(IVTV_REG_GPIO_DIR);
103 curdir |= 0x80;
104 write_reg(curdir, IVTV_REG_GPIO_DIR);
105 curout = (curout & ~0xF) | 1;
106 write_reg(curout, IVTV_REG_GPIO_OUT);
107 /* We could use something else for smaller time */
108 schedule_timeout_interruptible(msecs_to_jiffies(1));
109 curout |= 2;
110 write_reg(curout, IVTV_REG_GPIO_OUT);
111 curdir &= ~0x80;
112 write_reg(curdir, IVTV_REG_GPIO_DIR);
113 }
114
115 /* Xceive tuner reset function */
ivtv_reset_tuner_gpio(void * dev,int component,int cmd,int value)116 int ivtv_reset_tuner_gpio(void *dev, int component, int cmd, int value)
117 {
118 struct i2c_algo_bit_data *algo = dev;
119 struct ivtv *itv = algo->data;
120 u32 curout;
121
122 if (cmd != XC2028_TUNER_RESET)
123 return 0;
124 IVTV_DEBUG_INFO("Resetting tuner\n");
125 curout = read_reg(IVTV_REG_GPIO_OUT);
126 curout &= ~(1 << itv->card->xceive_pin);
127 write_reg(curout, IVTV_REG_GPIO_OUT);
128 schedule_timeout_interruptible(msecs_to_jiffies(1));
129
130 curout |= 1 << itv->card->xceive_pin;
131 write_reg(curout, IVTV_REG_GPIO_OUT);
132 schedule_timeout_interruptible(msecs_to_jiffies(1));
133 return 0;
134 }
135
sd_to_ivtv(struct v4l2_subdev * sd)136 static inline struct ivtv *sd_to_ivtv(struct v4l2_subdev *sd)
137 {
138 return container_of(sd, struct ivtv, sd_gpio);
139 }
140
to_sd(struct v4l2_ctrl * ctrl)141 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
142 {
143 return &container_of(ctrl->handler, struct ivtv, hdl_gpio)->sd_gpio;
144 }
145
subdev_s_clock_freq(struct v4l2_subdev * sd,u32 freq)146 static int subdev_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
147 {
148 struct ivtv *itv = sd_to_ivtv(sd);
149 u16 mask, data;
150
151 mask = itv->card->gpio_audio_freq.mask;
152 switch (freq) {
153 case 32000:
154 data = itv->card->gpio_audio_freq.f32000;
155 break;
156 case 44100:
157 data = itv->card->gpio_audio_freq.f44100;
158 break;
159 case 48000:
160 default:
161 data = itv->card->gpio_audio_freq.f48000;
162 break;
163 }
164 if (mask)
165 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
166 return 0;
167 }
168
subdev_g_tuner(struct v4l2_subdev * sd,struct v4l2_tuner * vt)169 static int subdev_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
170 {
171 struct ivtv *itv = sd_to_ivtv(sd);
172 u16 mask;
173
174 mask = itv->card->gpio_audio_detect.mask;
175 if (mask == 0 || (read_reg(IVTV_REG_GPIO_IN) & mask))
176 vt->rxsubchans = V4L2_TUNER_SUB_STEREO |
177 V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
178 else
179 vt->rxsubchans = V4L2_TUNER_SUB_MONO;
180 return 0;
181 }
182
subdev_s_tuner(struct v4l2_subdev * sd,const struct v4l2_tuner * vt)183 static int subdev_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
184 {
185 struct ivtv *itv = sd_to_ivtv(sd);
186 u16 mask, data;
187
188 mask = itv->card->gpio_audio_mode.mask;
189 switch (vt->audmode) {
190 case V4L2_TUNER_MODE_LANG1:
191 data = itv->card->gpio_audio_mode.lang1;
192 break;
193 case V4L2_TUNER_MODE_LANG2:
194 data = itv->card->gpio_audio_mode.lang2;
195 break;
196 case V4L2_TUNER_MODE_MONO:
197 data = itv->card->gpio_audio_mode.mono;
198 break;
199 case V4L2_TUNER_MODE_STEREO:
200 case V4L2_TUNER_MODE_LANG1_LANG2:
201 default:
202 data = itv->card->gpio_audio_mode.stereo;
203 break;
204 }
205 if (mask)
206 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
207 return 0;
208 }
209
subdev_s_radio(struct v4l2_subdev * sd)210 static int subdev_s_radio(struct v4l2_subdev *sd)
211 {
212 struct ivtv *itv = sd_to_ivtv(sd);
213 u16 mask, data;
214
215 mask = itv->card->gpio_audio_input.mask;
216 data = itv->card->gpio_audio_input.radio;
217 if (mask)
218 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
219 return 0;
220 }
221
subdev_s_audio_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)222 static int subdev_s_audio_routing(struct v4l2_subdev *sd,
223 u32 input, u32 output, u32 config)
224 {
225 struct ivtv *itv = sd_to_ivtv(sd);
226 u16 mask, data;
227
228 if (input > 2)
229 return -EINVAL;
230 mask = itv->card->gpio_audio_input.mask;
231 switch (input) {
232 case 0:
233 data = itv->card->gpio_audio_input.tuner;
234 break;
235 case 1:
236 data = itv->card->gpio_audio_input.linein;
237 break;
238 case 2:
239 default:
240 data = itv->card->gpio_audio_input.radio;
241 break;
242 }
243 if (mask)
244 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
245 return 0;
246 }
247
subdev_s_ctrl(struct v4l2_ctrl * ctrl)248 static int subdev_s_ctrl(struct v4l2_ctrl *ctrl)
249 {
250 struct v4l2_subdev *sd = to_sd(ctrl);
251 struct ivtv *itv = sd_to_ivtv(sd);
252 u16 mask, data;
253
254 switch (ctrl->id) {
255 case V4L2_CID_AUDIO_MUTE:
256 mask = itv->card->gpio_audio_mute.mask;
257 data = ctrl->val ? itv->card->gpio_audio_mute.mute : 0;
258 if (mask)
259 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) |
260 (data & mask), IVTV_REG_GPIO_OUT);
261 return 0;
262 }
263 return -EINVAL;
264 }
265
266
subdev_log_status(struct v4l2_subdev * sd)267 static int subdev_log_status(struct v4l2_subdev *sd)
268 {
269 struct ivtv *itv = sd_to_ivtv(sd);
270
271 IVTV_INFO("GPIO status: DIR=0x%04x OUT=0x%04x IN=0x%04x\n",
272 read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT),
273 read_reg(IVTV_REG_GPIO_IN));
274 v4l2_ctrl_handler_log_status(&itv->hdl_gpio, sd->name);
275 return 0;
276 }
277
subdev_s_video_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)278 static int subdev_s_video_routing(struct v4l2_subdev *sd,
279 u32 input, u32 output, u32 config)
280 {
281 struct ivtv *itv = sd_to_ivtv(sd);
282 u16 mask, data;
283
284 if (input > 2) /* 0:Tuner 1:Composite 2:S-Video */
285 return -EINVAL;
286 mask = itv->card->gpio_video_input.mask;
287 if (input == 0)
288 data = itv->card->gpio_video_input.tuner;
289 else if (input == 1)
290 data = itv->card->gpio_video_input.composite;
291 else
292 data = itv->card->gpio_video_input.svideo;
293 if (mask)
294 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
295 return 0;
296 }
297
298 static const struct v4l2_ctrl_ops gpio_ctrl_ops = {
299 .s_ctrl = subdev_s_ctrl,
300 };
301
302 static const struct v4l2_subdev_core_ops subdev_core_ops = {
303 .log_status = subdev_log_status,
304 };
305
306 static const struct v4l2_subdev_tuner_ops subdev_tuner_ops = {
307 .s_radio = subdev_s_radio,
308 .g_tuner = subdev_g_tuner,
309 .s_tuner = subdev_s_tuner,
310 };
311
312 static const struct v4l2_subdev_audio_ops subdev_audio_ops = {
313 .s_clock_freq = subdev_s_clock_freq,
314 .s_routing = subdev_s_audio_routing,
315 };
316
317 static const struct v4l2_subdev_video_ops subdev_video_ops = {
318 .s_routing = subdev_s_video_routing,
319 };
320
321 static const struct v4l2_subdev_ops subdev_ops = {
322 .core = &subdev_core_ops,
323 .tuner = &subdev_tuner_ops,
324 .audio = &subdev_audio_ops,
325 .video = &subdev_video_ops,
326 };
327
ivtv_gpio_init(struct ivtv * itv)328 int ivtv_gpio_init(struct ivtv *itv)
329 {
330 u16 pin = 0;
331
332 if (itv->card->xceive_pin)
333 pin = 1 << itv->card->xceive_pin;
334
335 if ((itv->card->gpio_init.direction | pin) == 0)
336 return 0;
337
338 IVTV_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n",
339 read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT));
340
341 /* init output data then direction */
342 write_reg(itv->card->gpio_init.initial_value | pin, IVTV_REG_GPIO_OUT);
343 write_reg(itv->card->gpio_init.direction | pin, IVTV_REG_GPIO_DIR);
344 v4l2_subdev_init(&itv->sd_gpio, &subdev_ops);
345 snprintf(itv->sd_gpio.name, sizeof(itv->sd_gpio.name), "%s-gpio", itv->v4l2_dev.name);
346 itv->sd_gpio.grp_id = IVTV_HW_GPIO;
347 v4l2_ctrl_handler_init(&itv->hdl_gpio, 1);
348 v4l2_ctrl_new_std(&itv->hdl_gpio, &gpio_ctrl_ops,
349 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
350 if (itv->hdl_gpio.error)
351 return itv->hdl_gpio.error;
352 itv->sd_gpio.ctrl_handler = &itv->hdl_gpio;
353 v4l2_ctrl_handler_setup(&itv->hdl_gpio);
354 return v4l2_device_register_subdev(&itv->v4l2_dev, &itv->sd_gpio);
355 }
356
