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