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_VOLUME_MAX     100
  15 #define RSND_DVC_VOLUME_NUM     2
  16
  17 #define DVC_NAME "dvc"
  18
  19 struct rsnd_dvc {
  20         struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
  21         struct rsnd_mod mod;
  22         struct clk *clk;
  23         u8 volume[RSND_DVC_VOLUME_NUM];
  24 };
  25
  26 #define rsnd_mod_to_dvc(_mod)   \
  27         container_of((_mod), struct rsnd_dvc, mod)
  28
  29 #define for_each_rsnd_dvc(pos, priv, i)                         \
  30         for ((i) = 0;                                           \
  31              ((i) < rsnd_dvc_nr(priv)) &&                       \
  32              ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);      \
  33              i++)
  34
  35 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
  36 {
  37         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
  38         u32 max = (0x00800000 - 1);
  39         u32 vol[RSND_DVC_VOLUME_NUM];
  40         int i;
  41
  42         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
  43                 vol[i] = max / RSND_DVC_VOLUME_MAX * dvc->volume[i];
  44
  45         rsnd_mod_write(mod, DVC_VOL0R, vol[0]);
  46         rsnd_mod_write(mod, DVC_VOL1R, vol[1]);
  47 }
  48
  49 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
  50                                struct rsnd_dai *rdai)
  51 {
  52         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
  53         struct device *dev = rsnd_priv_to_dev(priv);
  54
  55         dev_dbg(dev, "%s (Gen2) is probed\n", rsnd_mod_name(mod));
  56
  57         return 0;
  58 }
  59
  60 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
  61                          struct rsnd_dai *rdai)
  62 {
  63         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(dvc_mod);
  64         struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
  65         struct rsnd_priv *priv = rsnd_mod_to_priv(dvc_mod);
  66         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
  67         struct device *dev = rsnd_priv_to_dev(priv);
  68         int dvc_id = rsnd_mod_id(dvc_mod);
  69         int src_id = rsnd_mod_id(src_mod);
  70         u32 route[] = {
  71                 [0] = 0x30000,
  72                 [1] = 0x30001,
  73                 [2] = 0x40000,
  74                 [3] = 0x10000,
  75                 [4] = 0x20000,
  76                 [5] = 0x40100
  77         };
  78
  79         if (src_id >= ARRAY_SIZE(route)) {
  80                 dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
  81                 return -EINVAL;
  82         }
  83
  84         clk_prepare_enable(dvc->clk);
  85
  86         /*
  87          * fixme
  88          * it doesn't support CTU/MIX
  89          */
  90         rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
  91
  92         rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
  93         rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
  94
  95         rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
  96
  97         rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
  98
  99         /*  enable Volume  */
 100         rsnd_mod_write(dvc_mod, DVC_DVUCR, 0x100);
 101
 102         /* ch0/ch1 Volume */
 103         rsnd_dvc_volume_update(dvc_mod);
 104
 105         rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
 106
 107         rsnd_mod_write(dvc_mod, DVC_DVUER, 1);
 108
 109         rsnd_adg_set_cmd_timsel_gen2(rdai, dvc_mod, io);
 110
 111         return 0;
 112 }
 113
 114 static int rsnd_dvc_quit(struct rsnd_mod *mod,
 115                          struct rsnd_dai *rdai)
 116 {
 117         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 118
 119         clk_disable_unprepare(dvc->clk);
 120
 121         return 0;
 122 }
 123
 124 static int rsnd_dvc_start(struct rsnd_mod *mod,
 125                           struct rsnd_dai *rdai)
 126 {
 127         rsnd_mod_write(mod, CMD_CTRL, 0x10);
 128
 129         return 0;
 130 }
 131
 132 static int rsnd_dvc_stop(struct rsnd_mod *mod,
 133                          struct rsnd_dai *rdai)
 134 {
 135         rsnd_mod_write(mod, CMD_CTRL, 0);
 136
 137         return 0;
 138 }
 139
 140 static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
 141                                struct snd_ctl_elem_info *uinfo)
 142 {
 143         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 144         uinfo->count = RSND_DVC_VOLUME_NUM;
 145         uinfo->value.integer.min = 0;
 146         uinfo->value.integer.max = RSND_DVC_VOLUME_MAX;
 147
 148         return 0;
 149 }
 150
 151 static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
 152                               struct snd_ctl_elem_value *ucontrol)
 153 {
 154         u8 *val = (u8 *)kctrl->private_value;
 155         int i;
 156
 157         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++)
 158                 ucontrol->value.integer.value[i] = val[i];
 159
 160         return 0;
 161 }
 162
 163 static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
 164                               struct snd_ctl_elem_value *ucontrol)
 165 {
 166         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 167         u8 *val = (u8 *)kctrl->private_value;
 168         int i, change = 0;
 169
 170         for (i = 0; i < RSND_DVC_VOLUME_NUM; i++) {
 171                 change |= (ucontrol->value.integer.value[i] != val[i]);
 172                 val[i] = ucontrol->value.integer.value[i];
 173         }
 174
 175         if (change)
 176                 rsnd_dvc_volume_update(mod);
 177
 178         return change;
 179 }
 180
 181 static int __rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 182                               struct rsnd_dai *rdai,
 183                               struct snd_soc_pcm_runtime *rtd,
 184                               const unsigned char *name,
 185                               u8 *private)
 186 {
 187         struct snd_card *card = rtd->card->snd_card;
 188         struct snd_kcontrol *kctrl;
 189         struct snd_kcontrol_new knew = {
 190                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 191                 .name           = name,
 192                 .info           = rsnd_dvc_volume_info,
 193                 .get            = rsnd_dvc_volume_get,
 194                 .put            = rsnd_dvc_volume_put,
 195                 .private_value  = (unsigned long)private,
 196         };
 197         int ret;
 198
 199         kctrl = snd_ctl_new1(&knew, mod);
 200         if (!kctrl)
 201                 return -ENOMEM;
 202
 203         ret = snd_ctl_add(card, kctrl);
 204         if (ret < 0)
 205                 return ret;
 206
 207         return 0;
 208 }
 209
 210 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
 211                             struct rsnd_dai *rdai,
 212                             struct snd_soc_pcm_runtime *rtd)
 213 {
 214         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 215         struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
 216         int ret;
 217
 218         /* Volume */
 219         ret = __rsnd_dvc_pcm_new(mod, rdai, rtd,
 220                         rsnd_dai_is_play(rdai, io) ?
 221                         "DVC Out Playback Volume" : "DVC In Capture Volume",
 222                         dvc->volume);
 223         if (ret < 0)
 224                 return ret;
 225
 226         return 0;
 227 }
 228
 229 static struct rsnd_mod_ops rsnd_dvc_ops = {
 230         .name           = DVC_NAME,
 231         .probe          = rsnd_dvc_probe_gen2,
 232         .init           = rsnd_dvc_init,
 233         .quit           = rsnd_dvc_quit,
 234         .start          = rsnd_dvc_start,
 235         .stop           = rsnd_dvc_stop,
 236         .pcm_new        = rsnd_dvc_pcm_new,
 237 };
 238
 239 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
 240 {
 241         if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
 242                 id = 0;
 243
 244         return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
 245 }
 246
 247 static void rsnd_of_parse_dvc(struct platform_device *pdev,
 248                               const struct rsnd_of_data *of_data,
 249                               struct rsnd_priv *priv)
 250 {
 251         struct device_node *node;
 252         struct rsnd_dvc_platform_info *dvc_info;
 253         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 254         struct device *dev = &pdev->dev;
 255         int nr;
 256
 257         if (!of_data)
 258                 return;
 259
 260         node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 261         if (!node)
 262                 return;
 263
 264         nr = of_get_child_count(node);
 265         if (!nr)
 266                 goto rsnd_of_parse_dvc_end;
 267
 268         dvc_info = devm_kzalloc(dev,
 269                                 sizeof(struct rsnd_dvc_platform_info) * nr,
 270                                 GFP_KERNEL);
 271         if (!dvc_info) {
 272                 dev_err(dev, "dvc info allocation error\n");
 273                 goto rsnd_of_parse_dvc_end;
 274         }
 275
 276         info->dvc_info          = dvc_info;
 277         info->dvc_info_nr       = nr;
 278
 279 rsnd_of_parse_dvc_end:
 280         of_node_put(node);
 281 }
 282
 283 int rsnd_dvc_probe(struct platform_device *pdev,
 284                    const struct rsnd_of_data *of_data,
 285                    struct rsnd_priv *priv)
 286 {
 287         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 288         struct device *dev = rsnd_priv_to_dev(priv);
 289         struct rsnd_dvc *dvc;
 290         struct clk *clk;
 291         char name[RSND_DVC_NAME_SIZE];
 292         int i, nr;
 293
 294         rsnd_of_parse_dvc(pdev, of_data, priv);
 295
 296         nr = info->dvc_info_nr;
 297         if (!nr)
 298                 return 0;
 299
 300         /* This driver doesn't support Gen1 at this point */
 301         if (rsnd_is_gen1(priv)) {
 302                 dev_warn(dev, "CMD is not supported on Gen1\n");
 303                 return -EINVAL;
 304         }
 305
 306         dvc     = devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
 307         if (!dvc) {
 308                 dev_err(dev, "CMD allocate failed\n");
 309                 return -ENOMEM;
 310         }
 311
 312         priv->dvc_nr    = nr;
 313         priv->dvc       = dvc;
 314
 315         for_each_rsnd_dvc(dvc, priv, i) {
 316                 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
 317                          DVC_NAME, i);
 318
 319                 clk = devm_clk_get(dev, name);
 320                 if (IS_ERR(clk))
 321                         return PTR_ERR(clk);
 322
 323                 dvc->info = &info->dvc_info[i];
 324                 dvc->clk  = clk;
 325
 326                 rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
 327
 328                 dev_dbg(dev, "CMD%d probed\n", i);
 329         }
 330
 331         return 0;
 332 }