1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * helper functions for Asus Xonar cards
4 *
5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
6 */
7
8#include <linux/delay.h>
9#include <sound/core.h>
10#include <sound/control.h>
11#include <sound/pcm.h>
12#include <sound/pcm_params.h>
13#include "xonar.h"
14
15
16#define GPIO_CS53x1_M_MASK	0x000c
17#define GPIO_CS53x1_M_SINGLE	0x0000
18#define GPIO_CS53x1_M_DOUBLE	0x0004
19#define GPIO_CS53x1_M_QUAD	0x0008
20
21
22void xonar_enable_output(struct oxygen *chip)
23{
24	struct xonar_generic *data = chip->model_data;
25
26	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, data->output_enable_bit);
27	msleep(data->anti_pop_delay);
28	oxygen_set_bits16(chip, OXYGEN_GPIO_DATA, data->output_enable_bit);
29}
30
31void xonar_disable_output(struct oxygen *chip)
32{
33	struct xonar_generic *data = chip->model_data;
34
35	oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA, data->output_enable_bit);
36}
37
38static void xonar_ext_power_gpio_changed(struct oxygen *chip)
39{
40	struct xonar_generic *data = chip->model_data;
41	u8 has_power;
42
43	has_power = !!(oxygen_read8(chip, data->ext_power_reg)
44		       & data->ext_power_bit);
45	if (has_power != data->has_power) {
46		data->has_power = has_power;
47		if (has_power) {
48			dev_notice(chip->card->dev, "power restored\n");
49		} else {
50			dev_crit(chip->card->dev,
51				   "Hey! Don't unplug the power cable!\n");
52			/* TODO: stop PCMs */
53		}
54	}
55}
56
57void xonar_init_ext_power(struct oxygen *chip)
58{
59	struct xonar_generic *data = chip->model_data;
60
61	oxygen_set_bits8(chip, data->ext_power_int_reg,
62			 data->ext_power_bit);
63	chip->interrupt_mask |= OXYGEN_INT_GPIO;
64	chip->model.gpio_changed = xonar_ext_power_gpio_changed;
65	data->has_power = !!(oxygen_read8(chip, data->ext_power_reg)
66			     & data->ext_power_bit);
67}
68
69void xonar_init_cs53x1(struct oxygen *chip)
70{
71	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_CS53x1_M_MASK);
72	oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
73			      GPIO_CS53x1_M_SINGLE, GPIO_CS53x1_M_MASK);
74}
75
76void xonar_set_cs53x1_params(struct oxygen *chip,
77			     struct snd_pcm_hw_params *params)
78{
79	unsigned int value;
80
81	if (params_rate(params) <= 54000)
82		value = GPIO_CS53x1_M_SINGLE;
83	else if (params_rate(params) <= 108000)
84		value = GPIO_CS53x1_M_DOUBLE;
85	else
86		value = GPIO_CS53x1_M_QUAD;
87	oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
88			      value, GPIO_CS53x1_M_MASK);
89}
90
91int xonar_gpio_bit_switch_get(struct snd_kcontrol *ctl,
92			      struct snd_ctl_elem_value *value)
93{
94	struct oxygen *chip = ctl->private_data;
95	u16 bit = ctl->private_value;
96	bool invert = ctl->private_value & XONAR_GPIO_BIT_INVERT;
97
98	value->value.integer.value[0] =
99		!!(oxygen_read16(chip, OXYGEN_GPIO_DATA) & bit) ^ invert;
100	return 0;
101}
102
103int xonar_gpio_bit_switch_put(struct snd_kcontrol *ctl,
104			      struct snd_ctl_elem_value *value)
105{
106	struct oxygen *chip = ctl->private_data;
107	u16 bit = ctl->private_value;
108	bool invert = ctl->private_value & XONAR_GPIO_BIT_INVERT;
109	u16 old_bits, new_bits;
110	int changed;
111
112	spin_lock_irq(&chip->reg_lock);
113	old_bits = oxygen_read16(chip, OXYGEN_GPIO_DATA);
114	if (!!value->value.integer.value[0] ^ invert)
115		new_bits = old_bits | bit;
116	else
117		new_bits = old_bits & ~bit;
118	changed = new_bits != old_bits;
119	if (changed)
120		oxygen_write16(chip, OXYGEN_GPIO_DATA, new_bits);
121	spin_unlock_irq(&chip->reg_lock);
122	return changed;
123}
124