1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * wm8775 - driver version 0.0.1
10  * - Cleanup
11  * - V4L2 API update
12  * - sound fixes
22 #include <media/v4l2-device.h>
23 #include <media/v4l2-ctrls.h>
32 /* ----------------------------------------------------------------------- */
50 	u8 input;		/* Last selected input (0-0xf) */
60 	return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd;  in to_sd()
70 		return -1;  in wm8775_write()
78 	return -1;  in wm8775_write()
85 	int muted = 0 != state->mute->val;  in wm8775_set_audio()
86 	u16 volume = (u16)state->vol->val;  in wm8775_set_audio()
87 	u16 balance = (u16)state->bal->val;  in wm8775_set_audio()
89 	/* normalize ( 65535 to 0 -> 255 to 0 (+24dB to -103dB) ) */  in wm8775_set_audio()
90 	vol_l = (min(65536 - balance, 32768) * volume) >> 23;  in wm8775_set_audio()
95 		wm8775_write(sd, R21, 0x0c0 | state->input);  in wm8775_set_audio()
100 	/* Un-mute */  in wm8775_set_audio()
102 		wm8775_write(sd, R21, state->input);  in wm8775_set_audio()
117 		return -EINVAL;  in wm8775_s_routing()
119 	state->input = input;  in wm8775_s_routing()
120 	if (v4l2_ctrl_g_ctrl(state->mute))  in wm8775_s_routing()
122 	if (!v4l2_ctrl_g_ctrl(state->vol))  in wm8775_s_routing()
132 	switch (ctrl->id) {  in wm8775_s_ctrl()
139 		wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD);  in wm8775_s_ctrl()
142 	return -EINVAL;  in wm8775_s_ctrl()
149 	v4l2_info(sd, "Input: %d\n", state->input);  in wm8775_log_status()
150 	v4l2_ctrl_handler_log_status(&state->hdl, sd->name);  in wm8775_log_status()
160 /* ----------------------------------------------------------------------- */
181 	.audio = &wm8775_audio_ops,
184 /* ----------------------------------------------------------------------- */
200 	if (client->dev.platform_data) {  in wm8775_probe()
201 		struct wm8775_platform_data *data = client->dev.platform_data;  in wm8775_probe()
202 		is_nova_s = data->is_nova_s;  in wm8775_probe()
206 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))  in wm8775_probe()
207 		return -EIO;  in wm8775_probe()
210 			client->addr << 1, client->adapter->name);  in wm8775_probe()
212 	state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);  in wm8775_probe()
214 		return -ENOMEM;  in wm8775_probe()
215 	sd = &state->sd;  in wm8775_probe()
217 	state->input = 2;  in wm8775_probe()
219 	v4l2_ctrl_handler_init(&state->hdl, 4);  in wm8775_probe()
220 	state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,  in wm8775_probe()
222 	state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,  in wm8775_probe()
223 			V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00); /* 0dB*/  in wm8775_probe()
224 	state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,  in wm8775_probe()
226 	state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,  in wm8775_probe()
228 	sd->ctrl_handler = &state->hdl;  in wm8775_probe()
229 	err = state->hdl.error;  in wm8775_probe()
231 		v4l2_ctrl_handler_free(&state->hdl);  in wm8775_probe()
241 	/* HPF enable, left justified, 24-bit (Philips) mode */  in wm8775_probe()
249 		/* ADC gain +2.5dB, enable zero cross */  in wm8775_probe()
251 		/* ADC gain +2.5dB, enable zero cross */  in wm8775_probe()
253 		/* ALC Stereo, ALC target level -1dB FS max gain +8dB */  in wm8775_probe()
255 		/* Enable gain control, use zero cross detection,  in wm8775_probe()
259 		/* ALC stereo, ALC target level -5dB FS, ALC max gain +8dB */  in wm8775_probe()
262 		wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD);  in wm8775_probe()
264 	/* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */  in wm8775_probe()
266 	/* Enable noise gate, threshold -72dBfs */  in wm8775_probe()
269 		/* Transient window 4ms, lower PGA gain limit -1dB */  in wm8775_probe()
274 		/* Transient window 4ms, ALC min gain -5dB  */  in wm8775_probe()
288 	v4l2_ctrl_handler_free(&state->hdl);  in wm8775_remove()