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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | // SPDX-License-Identifier: GPL-2.0-or-later /* * ALSA Driver for the PT2258 volume controller. * * Copyright (c) 2006 Jochen Voss <voss@seehuhn.de> */ #include <sound/core.h> #include <sound/control.h> #include <sound/tlv.h> #include <sound/i2c.h> #include <sound/pt2258.h> #include <linux/module.h> MODULE_AUTHOR("Jochen Voss <voss@seehuhn.de>"); MODULE_DESCRIPTION("PT2258 volume controller (Princeton Technology Corp.)"); MODULE_LICENSE("GPL"); #define PT2258_CMD_RESET 0xc0 #define PT2258_CMD_UNMUTE 0xf8 #define PT2258_CMD_MUTE 0xf9 static const unsigned char pt2258_channel_code[12] = { 0x80, 0x90, /* channel 1: -10dB, -1dB */ 0x40, 0x50, /* channel 2: -10dB, -1dB */ 0x00, 0x10, /* channel 3: -10dB, -1dB */ 0x20, 0x30, /* channel 4: -10dB, -1dB */ 0x60, 0x70, /* channel 5: -10dB, -1dB */ 0xa0, 0xb0 /* channel 6: -10dB, -1dB */ }; int snd_pt2258_reset(struct snd_pt2258 *pt) { unsigned char bytes[2]; int i; /* reset chip */ bytes[0] = PT2258_CMD_RESET; snd_i2c_lock(pt->i2c_bus); if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1) goto __error; snd_i2c_unlock(pt->i2c_bus); /* mute all channels */ pt->mute = 1; bytes[0] = PT2258_CMD_MUTE; snd_i2c_lock(pt->i2c_bus); if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1) goto __error; snd_i2c_unlock(pt->i2c_bus); /* set all channels to 0dB */ for (i = 0; i < 6; ++i) pt->volume[i] = 0; bytes[0] = 0xd0; bytes[1] = 0xe0; snd_i2c_lock(pt->i2c_bus); if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2) goto __error; snd_i2c_unlock(pt->i2c_bus); return 0; __error: snd_i2c_unlock(pt->i2c_bus); snd_printk(KERN_ERR "PT2258 reset failed\n"); return -EIO; } static int pt2258_stereo_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = 2; uinfo->value.integer.min = 0; uinfo->value.integer.max = 79; return 0; } static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pt2258 *pt = kcontrol->private_data; int base = kcontrol->private_value; /* chip does not support register reads */ ucontrol->value.integer.value[0] = 79 - pt->volume[base]; ucontrol->value.integer.value[1] = 79 - pt->volume[base + 1]; return 0; } static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pt2258 *pt = kcontrol->private_data; int base = kcontrol->private_value; unsigned char bytes[2]; int val0, val1; val0 = 79 - ucontrol->value.integer.value[0]; val1 = 79 - ucontrol->value.integer.value[1]; if (val0 < 0 || val0 > 79 || val1 < 0 || val1 > 79) return -EINVAL; if (val0 == pt->volume[base] && val1 == pt->volume[base + 1]) return 0; pt->volume[base] = val0; bytes[0] = pt2258_channel_code[2 * base] | (val0 / 10); bytes[1] = pt2258_channel_code[2 * base + 1] | (val0 % 10); snd_i2c_lock(pt->i2c_bus); if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2) goto __error; snd_i2c_unlock(pt->i2c_bus); pt->volume[base + 1] = val1; bytes[0] = pt2258_channel_code[2 * base + 2] | (val1 / 10); bytes[1] = pt2258_channel_code[2 * base + 3] | (val1 % 10); snd_i2c_lock(pt->i2c_bus); if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2) goto __error; snd_i2c_unlock(pt->i2c_bus); return 1; __error: snd_i2c_unlock(pt->i2c_bus); snd_printk(KERN_ERR "PT2258 access failed\n"); return -EIO; } #define pt2258_switch_info snd_ctl_boolean_mono_info static int pt2258_switch_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pt2258 *pt = kcontrol->private_data; ucontrol->value.integer.value[0] = !pt->mute; return 0; } static int pt2258_switch_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pt2258 *pt = kcontrol->private_data; unsigned char bytes[2]; int val; val = !ucontrol->value.integer.value[0]; if (pt->mute == val) return 0; pt->mute = val; bytes[0] = val ? PT2258_CMD_MUTE : PT2258_CMD_UNMUTE; snd_i2c_lock(pt->i2c_bus); if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1) goto __error; snd_i2c_unlock(pt->i2c_bus); return 1; __error: snd_i2c_unlock(pt->i2c_bus); snd_printk(KERN_ERR "PT2258 access failed 2\n"); return -EIO; } static const DECLARE_TLV_DB_SCALE(pt2258_db_scale, -7900, 100, 0); int snd_pt2258_build_controls(struct snd_pt2258 *pt) { struct snd_kcontrol_new knew; char *names[3] = { "Mic Loopback Playback Volume", "Line Loopback Playback Volume", "CD Loopback Playback Volume" }; int i, err; for (i = 0; i < 3; ++i) { memset(&knew, 0, sizeof(knew)); knew.name = names[i]; knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER; knew.count = 1; knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ; knew.private_value = 2 * i; knew.info = pt2258_stereo_volume_info; knew.get = pt2258_stereo_volume_get; knew.put = pt2258_stereo_volume_put; knew.tlv.p = pt2258_db_scale; err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt)); if (err < 0) return err; } memset(&knew, 0, sizeof(knew)); knew.name = "Loopback Switch"; knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER; knew.info = pt2258_switch_info; knew.get = pt2258_switch_get; knew.put = pt2258_switch_put; knew.access = 0; err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt)); if (err < 0) return err; return 0; } EXPORT_SYMBOL(snd_pt2258_reset); EXPORT_SYMBOL(snd_pt2258_build_controls); |