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
22 void 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
31 void 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
38 static 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
57 void 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
69 void 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
76 void 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
91 int 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
103 int 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
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