sound/soc/sh/rcar/dvc.c

   1 /*
   2  * Renesas R-Car DVC support
   3  *
   4  * Copyright (C) 2014 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include "rsnd.h"
  12
  13 #define RSND_DVC_NAME_SIZE      16
  14 #define RSND_DVC_CHANNELS       2
  15
  16 #define DVC_NAME "dvc"
  17
  18 struct rsnd_dvc_cfg {
  19         unsigned int max;
  20         u32 val[RSND_DVC_CHANNELS];
  21 };
  22
  23 struct rsnd_dvc {
  24         struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
  25         struct rsnd_mod mod;
  26         struct clk *clk;
  27         struct rsnd_dvc_cfg volume;
  28         struct rsnd_dvc_cfg mute;
  29 };
  30
  31 #define rsnd_mod_to_dvc(_mod)   \
  32         container_of((_mod), struct rsnd_dvc, mod)
  33
  34 #define for_each_rsnd_dvc(pos, priv, i)                         \
  35         for ((i) = 0;                                           \
  36              ((i) < rsnd_dvc_nr(priv)) &&                       \
  37              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  38              i++)
  39
  40 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
  41 {
  42         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  43         u32 dvucr = 0;
  44         u32 mute = 0;
  45         int i;
  46
  47         for (i = 0; i < RSND_DVC_CHANNELS; i++) {
  48                 mute |= (!!dvc->mute.val[i]) << i;
  49         }
  50
  51         /* Disable DVC Register access */
  52         rsnd_mod_write(mod, DVC_DVUER, 0);
  53
  54         /* Enable Digital Volume */
  55         dvucr = 0x100;
  56         rsnd_mod_write(mod, DVC_VOL0R, dvc->volume.val[0]);
  57         rsnd_mod_write(mod, DVC_VOL1R, dvc->volume.val[1]);
  58
  59         /*  Enable Mute */
  60         if (mute) {
  61                 dvucr |= 0x1;
  62                 rsnd_mod_write(mod, DVC_ZCMCR, mute);
  63         }
  64
  65         rsnd_mod_write(mod, DVC_DVUCR, dvucr);
  66
  67         /* Enable DVC Register access */
  68         rsnd_mod_write(mod, DVC_DVUER, 1);
  69 }
  70
  71 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
  72                                struct rsnd_dai *rdai)
  73 {
  74         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
  75         struct device *dev = rsnd_priv_to_dev(priv);
  76
  77         dev_dbg(dev, "%s (Gen2) is probed\n", rsnd_mod_name(mod));
  78
  79         return 0;
  80 }
  81
  82 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
  83                          struct rsnd_dai *rdai)
  84 {
  85         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(dvc_mod);
  86         struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
  87         struct rsnd_priv *priv = rsnd_mod_to_priv(dvc_mod);
  88         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
  89         struct device *dev = rsnd_priv_to_dev(priv);
  90         int dvc_id = rsnd_mod_id(dvc_mod);
  91         int src_id = rsnd_mod_id(src_mod);
  92         u32 route[] = {
  93                 [0] = 0x30000,
  94                 [1] = 0x30001,
  95                 [2] = 0x40000,
  96                 [3] = 0x10000,
  97                 [4] = 0x20000,
  98                 [5] = 0x40100
  99         };
 100
 101         if (src_id >= ARRAY_SIZE(route)) {
 102                 dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
 103                 return -EINVAL;
 104         }
 105
 106         clk_prepare_enable(dvc->clk);
 107
 108         /*
 109          * fixme
 110          * it doesn't support CTU/MIX
 111          */
 112         rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
 113
 114         rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
 115         rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
 116
 117         rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
 118
 119         rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
 120
 121         /* ch0/ch1 Volume */
 122         rsnd_dvc_volume_update(dvc_mod);
 123
 124         rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
 125
 126         rsnd_adg_set_cmd_timsel_gen2(rdai, dvc_mod, io);
 127
 128         return 0;
 129 }
 130
 131 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 132                          struct rsnd_dai *rdai)
 133 {
 134         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 135
 136         clk_disable_unprepare(dvc->clk);
 137
 138         return 0;
 139 }
 140
 141 static int rsnd_dvc_start(struct rsnd_mod *mod,
 142                           struct rsnd_dai *rdai)
 143 {
 144         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 145
 146         return 0;
 147 }
 148
 149 static int rsnd_dvc_stop(struct rsnd_mod *mod,
 150                          struct rsnd_dai *rdai)
 151 {
 152         rsnd_mod_write(mod, CMD_CTRL, 0);
 153
 154         return 0;
 155 }
 156
 157 static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
 158                                struct snd_ctl_elem_info *uinfo)
 159 {
 160         struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 161
 162         uinfo->count = RSND_DVC_CHANNELS;
 163         uinfo->value.integer.min = 0;
 164         uinfo->value.integer.max = cfg->max;
 165
 166         if (cfg->max == 1)
 167                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 168         else
 169                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 170
 171         return 0;
 172 }
 173
 174 static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
 175                               struct snd_ctl_elem_value *ucontrol)
 176 {
 177         struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 178         int i;
 179
 180         for (i = 0; i < RSND_DVC_CHANNELS; i++)
 181                 ucontrol->value.integer.value[i] = cfg->val[i];
 182
 183         return 0;
 184 }
 185
 186 static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
 187                               struct snd_ctl_elem_value *ucontrol)
 188 {
 189         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 190         struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 191         int i, change = 0;
 192
 193         for (i = 0; i < RSND_DVC_CHANNELS; i++) {
 194                 change |= (ucontrol->value.integer.value[i] != cfg->val[i]);
 195                 cfg->val[i] = ucontrol->value.integer.value[i];
 196         }
 197
 198         if (change)
 199                 rsnd_dvc_volume_update(mod);
 200
 201         return change;
 202 }
 203
 204 static int __rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 205                               struct rsnd_dai *rdai,
 206                               struct snd_soc_pcm_runtime *rtd,
 207                               const unsigned char *name,
 208                               struct rsnd_dvc_cfg *private)
 209 {
 210         struct snd_card *card = rtd->card->snd_card;
 211         struct snd_kcontrol *kctrl;
 212         struct snd_kcontrol_new knew = {
 213                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 214                 .name           = name,
 215                 .info           = rsnd_dvc_volume_info,
 216                 .get            = rsnd_dvc_volume_get,
 217                 .put            = rsnd_dvc_volume_put,
 218                 .private_value  = (unsigned long)private,
 219         };
 220         int ret;
 221
 222         kctrl = snd_ctl_new1(&knew, mod);
 223         if (!kctrl)
 224                 return -ENOMEM;
 225
 226         ret = snd_ctl_add(card, kctrl);
 227         if (ret < 0)
 228                 return ret;
 229
 230         return 0;
 231 }
 232
 233 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 234                             struct rsnd_dai *rdai,
 235                             struct snd_soc_pcm_runtime *rtd)
 236 {
 237         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 238         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 239         int ret;
 240
 241         /* Volume */
 242         dvc->volume.max = 0x00800000 - 1;
 243         ret = __rsnd_dvc_pcm_new(mod, rdai, rtd,
 244                         rsnd_dai_is_play(rdai, io) ?
 245                         "DVC Out Playback Volume" : "DVC In Capture Volume",
 246                         &dvc->volume);
 247         if (ret < 0)
 248                 return ret;
 249
 250         /* Mute */
 251         dvc->mute.max = 1;
 252         ret = __rsnd_dvc_pcm_new(mod, rdai, rtd,
 253                         rsnd_dai_is_play(rdai, io) ?
 254                         "DVC Out Mute Switch" : "DVC In Mute Switch",
 255                         &dvc->mute);
 256         if (ret < 0)
 257                 return ret;
 258
 259         return 0;
 260 }
 261
 262 static struct rsnd_mod_ops rsnd_dvc_ops = {
 263         .name           = DVC_NAME,
 264         .probe          = rsnd_dvc_probe_gen2,
 265         .init           = rsnd_dvc_init,
 266         .quit           = rsnd_dvc_quit,
 267         .start          = rsnd_dvc_start,
 268         .stop           = rsnd_dvc_stop,
 269         .pcm_new        = rsnd_dvc_pcm_new,
 270 };
 271
 272 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 273 {
 274         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 275                 id = 0;
 276
 277         return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 278 }
 279
 280 static void rsnd_of_parse_dvc(struct platform_device *pdev,
 281                               const struct rsnd_of_data *of_data,
 282                               struct rsnd_priv *priv)
 283 {
 284         struct device_node *node;
 285         struct rsnd_dvc_platform_info *dvc_info;
 286         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 287         struct device *dev = &pdev->dev;
 288         int nr;
 289
 290         if (!of_data)
 291                 return;
 292
 293         node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 294         if (!node)
 295                 return;
 296
 297         nr = of_get_child_count(node);
 298         if (!nr)
 299                 goto rsnd_of_parse_dvc_end;
 300
 301         dvc_info = devm_kzalloc(dev,
 302                                 sizeof(struct rsnd_dvc_platform_info) * nr,
 303                                 GFP_KERNEL);
 304         if (!dvc_info) {
 305                 dev_err(dev, "dvc info allocation error\n");
 306                 goto rsnd_of_parse_dvc_end;
 307         }
 308
 309         info->dvc_info          = dvc_info;
 310         info->dvc_info_nr       = nr;
 311
 312 rsnd_of_parse_dvc_end:
 313         of_node_put(node);
 314 }
 315
 316 int rsnd_dvc_probe(struct platform_device *pdev,
 317                    const struct rsnd_of_data *of_data,
 318                    struct rsnd_priv *priv)
 319 {
 320         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 321         struct device *dev = rsnd_priv_to_dev(priv);
 322         struct rsnd_dvc *dvc;
 323         struct clk *clk;
 324         char name[RSND_DVC_NAME_SIZE];
 325         int i, nr;
 326
 327         rsnd_of_parse_dvc(pdev, of_data, priv);
 328
 329         nr = info->dvc_info_nr;
 330         if (!nr)
 331                 return 0;
 332
 333         /* This driver doesn't support Gen1 at this point */
 334         if (rsnd_is_gen1(priv)) {
 335                 dev_warn(dev, "CMD is not supported on Gen1\n");
 336                 return -EINVAL;
 337         }
 338
 339         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 340         if (!dvc) {
 341                 dev_err(dev, "CMD allocate failed\n");
 342                 return -ENOMEM;
 343         }
 344
 345         priv->dvc_nr    = nr;
 346         priv->dvc       = dvc;
 347
 348         for_each_rsnd_dvc(dvc, priv, i) {
 349                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 350                          DVC_NAME, i);
 351
 352                 clk = devm_clk_get(dev, name);
 353                 if (IS_ERR(clk))
 354                         return PTR_ERR(clk);
 355
 356                 dvc->info = &info->dvc_info[i];
 357                 dvc->clk  = clk;
 358
 359                 rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
 360
 361                 dev_dbg(dev, "CMD%d probed\n", i);
 362         }
 363
 364         return 0;
 365 }