Takashi Sakamoto | 31514bf | 2014-11-29 00:59:29 +0900 | [diff] [blame] | 1 | /* |
| 2 | * oxfw_stream.c - a part of driver for OXFW970/971 based devices |
| 3 | * |
| 4 | * Copyright (c) Clemens Ladisch <clemens@ladisch.de> |
| 5 | * Licensed under the terms of the GNU General Public License, version 2. |
| 6 | */ |
| 7 | |
| 8 | #include "oxfw.h" |
| 9 | |
| 10 | enum control_action { CTL_READ, CTL_WRITE }; |
| 11 | enum control_attribute { |
| 12 | CTL_MIN = 0x02, |
| 13 | CTL_MAX = 0x03, |
| 14 | CTL_CURRENT = 0x10, |
| 15 | }; |
| 16 | |
| 17 | static int oxfw_mute_command(struct snd_oxfw *oxfw, bool *value, |
| 18 | enum control_action action) |
| 19 | { |
| 20 | u8 *buf; |
| 21 | u8 response_ok; |
| 22 | int err; |
| 23 | |
| 24 | buf = kmalloc(11, GFP_KERNEL); |
| 25 | if (!buf) |
| 26 | return -ENOMEM; |
| 27 | |
| 28 | if (action == CTL_READ) { |
| 29 | buf[0] = 0x01; /* AV/C, STATUS */ |
| 30 | response_ok = 0x0c; /* STABLE */ |
| 31 | } else { |
| 32 | buf[0] = 0x00; /* AV/C, CONTROL */ |
| 33 | response_ok = 0x09; /* ACCEPTED */ |
| 34 | } |
| 35 | buf[1] = 0x08; /* audio unit 0 */ |
| 36 | buf[2] = 0xb8; /* FUNCTION BLOCK */ |
| 37 | buf[3] = 0x81; /* function block type: feature */ |
| 38 | buf[4] = oxfw->device_info->mute_fb_id; /* function block ID */ |
| 39 | buf[5] = 0x10; /* control attribute: current */ |
| 40 | buf[6] = 0x02; /* selector length */ |
| 41 | buf[7] = 0x00; /* audio channel number */ |
| 42 | buf[8] = 0x01; /* control selector: mute */ |
| 43 | buf[9] = 0x01; /* control data length */ |
| 44 | if (action == CTL_READ) |
| 45 | buf[10] = 0xff; |
| 46 | else |
| 47 | buf[10] = *value ? 0x70 : 0x60; |
| 48 | |
| 49 | err = fcp_avc_transaction(oxfw->unit, buf, 11, buf, 11, 0x3fe); |
| 50 | if (err < 0) |
| 51 | goto error; |
| 52 | if (err < 11) { |
| 53 | dev_err(&oxfw->unit->device, "short FCP response\n"); |
| 54 | err = -EIO; |
| 55 | goto error; |
| 56 | } |
| 57 | if (buf[0] != response_ok) { |
| 58 | dev_err(&oxfw->unit->device, "mute command failed\n"); |
| 59 | err = -EIO; |
| 60 | goto error; |
| 61 | } |
| 62 | if (action == CTL_READ) |
| 63 | *value = buf[10] == 0x70; |
| 64 | |
| 65 | err = 0; |
| 66 | |
| 67 | error: |
| 68 | kfree(buf); |
| 69 | |
| 70 | return err; |
| 71 | } |
| 72 | |
| 73 | static int oxfw_volume_command(struct snd_oxfw *oxfw, s16 *value, |
| 74 | unsigned int channel, |
| 75 | enum control_attribute attribute, |
| 76 | enum control_action action) |
| 77 | { |
| 78 | u8 *buf; |
| 79 | u8 response_ok; |
| 80 | int err; |
| 81 | |
| 82 | buf = kmalloc(12, GFP_KERNEL); |
| 83 | if (!buf) |
| 84 | return -ENOMEM; |
| 85 | |
| 86 | if (action == CTL_READ) { |
| 87 | buf[0] = 0x01; /* AV/C, STATUS */ |
| 88 | response_ok = 0x0c; /* STABLE */ |
| 89 | } else { |
| 90 | buf[0] = 0x00; /* AV/C, CONTROL */ |
| 91 | response_ok = 0x09; /* ACCEPTED */ |
| 92 | } |
| 93 | buf[1] = 0x08; /* audio unit 0 */ |
| 94 | buf[2] = 0xb8; /* FUNCTION BLOCK */ |
| 95 | buf[3] = 0x81; /* function block type: feature */ |
| 96 | buf[4] = oxfw->device_info->volume_fb_id; /* function block ID */ |
| 97 | buf[5] = attribute; /* control attribute */ |
| 98 | buf[6] = 0x02; /* selector length */ |
| 99 | buf[7] = channel; /* audio channel number */ |
| 100 | buf[8] = 0x02; /* control selector: volume */ |
| 101 | buf[9] = 0x02; /* control data length */ |
| 102 | if (action == CTL_READ) { |
| 103 | buf[10] = 0xff; |
| 104 | buf[11] = 0xff; |
| 105 | } else { |
| 106 | buf[10] = *value >> 8; |
| 107 | buf[11] = *value; |
| 108 | } |
| 109 | |
| 110 | err = fcp_avc_transaction(oxfw->unit, buf, 12, buf, 12, 0x3fe); |
| 111 | if (err < 0) |
| 112 | goto error; |
| 113 | if (err < 12) { |
| 114 | dev_err(&oxfw->unit->device, "short FCP response\n"); |
| 115 | err = -EIO; |
| 116 | goto error; |
| 117 | } |
| 118 | if (buf[0] != response_ok) { |
| 119 | dev_err(&oxfw->unit->device, "volume command failed\n"); |
| 120 | err = -EIO; |
| 121 | goto error; |
| 122 | } |
| 123 | if (action == CTL_READ) |
| 124 | *value = (buf[10] << 8) | buf[11]; |
| 125 | |
| 126 | err = 0; |
| 127 | |
| 128 | error: |
| 129 | kfree(buf); |
| 130 | |
| 131 | return err; |
| 132 | } |
| 133 | |
| 134 | static int oxfw_mute_get(struct snd_kcontrol *control, |
| 135 | struct snd_ctl_elem_value *value) |
| 136 | { |
| 137 | struct snd_oxfw *oxfw = control->private_data; |
| 138 | |
| 139 | value->value.integer.value[0] = !oxfw->mute; |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static int oxfw_mute_put(struct snd_kcontrol *control, |
| 145 | struct snd_ctl_elem_value *value) |
| 146 | { |
| 147 | struct snd_oxfw *oxfw = control->private_data; |
| 148 | bool mute; |
| 149 | int err; |
| 150 | |
| 151 | mute = !value->value.integer.value[0]; |
| 152 | |
| 153 | if (mute == oxfw->mute) |
| 154 | return 0; |
| 155 | |
| 156 | err = oxfw_mute_command(oxfw, &mute, CTL_WRITE); |
| 157 | if (err < 0) |
| 158 | return err; |
| 159 | oxfw->mute = mute; |
| 160 | |
| 161 | return 1; |
| 162 | } |
| 163 | |
| 164 | static int oxfw_volume_info(struct snd_kcontrol *control, |
| 165 | struct snd_ctl_elem_info *info) |
| 166 | { |
| 167 | struct snd_oxfw *oxfw = control->private_data; |
| 168 | |
| 169 | info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 170 | info->count = oxfw->device_info->mixer_channels; |
| 171 | info->value.integer.min = oxfw->volume_min; |
| 172 | info->value.integer.max = oxfw->volume_max; |
| 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 }; |
| 178 | |
| 179 | static int oxfw_volume_get(struct snd_kcontrol *control, |
| 180 | struct snd_ctl_elem_value *value) |
| 181 | { |
| 182 | struct snd_oxfw *oxfw = control->private_data; |
| 183 | unsigned int i; |
| 184 | |
| 185 | for (i = 0; i < oxfw->device_info->mixer_channels; ++i) |
| 186 | value->value.integer.value[channel_map[i]] = oxfw->volume[i]; |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int oxfw_volume_put(struct snd_kcontrol *control, |
| 192 | struct snd_ctl_elem_value *value) |
| 193 | { |
| 194 | struct snd_oxfw *oxfw = control->private_data; |
| 195 | unsigned int i, changed_channels; |
| 196 | bool equal_values = true; |
| 197 | s16 volume; |
| 198 | int err; |
| 199 | |
| 200 | for (i = 0; i < oxfw->device_info->mixer_channels; ++i) { |
| 201 | if (value->value.integer.value[i] < oxfw->volume_min || |
| 202 | value->value.integer.value[i] > oxfw->volume_max) |
| 203 | return -EINVAL; |
| 204 | if (value->value.integer.value[i] != |
| 205 | value->value.integer.value[0]) |
| 206 | equal_values = false; |
| 207 | } |
| 208 | |
| 209 | changed_channels = 0; |
| 210 | for (i = 0; i < oxfw->device_info->mixer_channels; ++i) |
| 211 | if (value->value.integer.value[channel_map[i]] != |
| 212 | oxfw->volume[i]) |
| 213 | changed_channels |= 1 << (i + 1); |
| 214 | |
| 215 | if (equal_values && changed_channels != 0) |
| 216 | changed_channels = 1 << 0; |
| 217 | |
| 218 | for (i = 0; i <= oxfw->device_info->mixer_channels; ++i) { |
| 219 | volume = value->value.integer.value[channel_map[i ? i - 1 : 0]]; |
| 220 | if (changed_channels & (1 << i)) { |
| 221 | err = oxfw_volume_command(oxfw, &volume, i, |
| 222 | CTL_CURRENT, CTL_WRITE); |
| 223 | if (err < 0) |
| 224 | return err; |
| 225 | } |
| 226 | if (i > 0) |
| 227 | oxfw->volume[i - 1] = volume; |
| 228 | } |
| 229 | |
| 230 | return changed_channels != 0; |
| 231 | } |
| 232 | |
| 233 | int snd_oxfw_create_mixer(struct snd_oxfw *oxfw) |
| 234 | { |
| 235 | static const struct snd_kcontrol_new controls[] = { |
| 236 | { |
| 237 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| 238 | .name = "PCM Playback Switch", |
| 239 | .info = snd_ctl_boolean_mono_info, |
| 240 | .get = oxfw_mute_get, |
| 241 | .put = oxfw_mute_put, |
| 242 | }, |
| 243 | { |
| 244 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| 245 | .name = "PCM Playback Volume", |
| 246 | .info = oxfw_volume_info, |
| 247 | .get = oxfw_volume_get, |
| 248 | .put = oxfw_volume_put, |
| 249 | }, |
| 250 | }; |
| 251 | unsigned int i, first_ch; |
| 252 | int err; |
| 253 | |
| 254 | err = oxfw_volume_command(oxfw, &oxfw->volume_min, |
| 255 | 0, CTL_MIN, CTL_READ); |
| 256 | if (err < 0) |
| 257 | return err; |
| 258 | err = oxfw_volume_command(oxfw, &oxfw->volume_max, |
| 259 | 0, CTL_MAX, CTL_READ); |
| 260 | if (err < 0) |
| 261 | return err; |
| 262 | |
| 263 | err = oxfw_mute_command(oxfw, &oxfw->mute, CTL_READ); |
| 264 | if (err < 0) |
| 265 | return err; |
| 266 | |
| 267 | first_ch = oxfw->device_info->mixer_channels == 1 ? 0 : 1; |
| 268 | for (i = 0; i < oxfw->device_info->mixer_channels; ++i) { |
| 269 | err = oxfw_volume_command(oxfw, &oxfw->volume[i], |
| 270 | first_ch + i, CTL_CURRENT, CTL_READ); |
| 271 | if (err < 0) |
| 272 | return err; |
| 273 | } |
| 274 | |
| 275 | for (i = 0; i < ARRAY_SIZE(controls); ++i) { |
| 276 | err = snd_ctl_add(oxfw->card, |
| 277 | snd_ctl_new1(&controls[i], oxfw)); |
| 278 | if (err < 0) |
| 279 | return err; |
| 280 | } |
| 281 | |
| 282 | return 0; |
| 283 | } |