sound/soc/sh/rcar/ssiu.c

   1 /*
   2  * Renesas R-Car SSIU support
   3  *
   4  * Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include "rsnd.h"
  11
  12 #define SSIU_NAME "ssiu"
  13
  14 struct rsnd_ssiu {
  15         struct rsnd_mod mod;
  16 };
  17
  18 #define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr)
  19 #define for_each_rsnd_ssiu(pos, priv, i)                                \
  20         for (i = 0;                                                     \
  21              (i < rsnd_ssiu_nr(priv)) &&                                \
  22                      ((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i));  \
  23              i++)
  24
  25 static int rsnd_ssiu_init(struct rsnd_mod *mod,
  26                           struct rsnd_dai_stream *io,
  27                           struct rsnd_priv *priv)
  28 {
  29         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
  30         u32 multi_ssi_slaves = rsnd_ssi_multi_slaves_runtime(io);
  31         int use_busif = rsnd_ssi_use_busif(io);
  32         int id = rsnd_mod_id(mod);
  33         u32 mask1, val1;
  34         u32 mask2, val2;
  35
  36         /* clear status */
  37         switch (id) {
  38         case 0:
  39         case 1:
  40         case 2:
  41         case 3:
  42         case 4:
  43                 rsnd_mod_write(mod, SSI_SYS_STATUS0, 0xf << (id * 4));
  44                 rsnd_mod_write(mod, SSI_SYS_STATUS2, 0xf << (id * 4));
  45                 rsnd_mod_write(mod, SSI_SYS_STATUS4, 0xf << (id * 4));
  46                 rsnd_mod_write(mod, SSI_SYS_STATUS6, 0xf << (id * 4));
  47                 break;
  48         case 9:
  49                 rsnd_mod_write(mod, SSI_SYS_STATUS1, 0xf << 4);
  50                 rsnd_mod_write(mod, SSI_SYS_STATUS3, 0xf << 4);
  51                 rsnd_mod_write(mod, SSI_SYS_STATUS5, 0xf << 4);
  52                 rsnd_mod_write(mod, SSI_SYS_STATUS7, 0xf << 4);
  53                 break;
  54         }
  55
  56         /*
  57          * SSI_MODE0
  58          */
  59         rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);
  60
  61         /*
  62          * SSI_MODE1
  63          */
  64         mask1 = (1 << 4) | (1 << 20);   /* mask sync bit */
  65         mask2 = (1 << 4);               /* mask sync bit */
  66         val1  = val2  = 0;
  67         if (id == 8) {
  68                 /*
  69                  * SSI8 pin is sharing with SSI7, nothing to do.
  70                  */
  71         } else if (rsnd_ssi_is_pin_sharing(io)) {
  72                 int shift = -1;
  73
  74                 switch (id) {
  75                 case 1:
  76                         shift = 0;
  77                         break;
  78                 case 2:
  79                         shift = 2;
  80                         break;
  81                 case 4:
  82                         shift = 16;
  83                         break;
  84                 default:
  85                         return -EINVAL;
  86                 }
  87
  88                 mask1 |= 0x3 << shift;
  89                 val1 = rsnd_rdai_is_clk_master(rdai) ?
  90                         0x2 << shift : 0x1 << shift;
  91
  92         } else if (multi_ssi_slaves) {
  93
  94                 mask2 |= 0x00000007;
  95                 mask1 |= 0x0000000f;
  96
  97                 switch (multi_ssi_slaves) {
  98                 case 0x0206: /* SSI0/1/2/9 */
  99                         val2 = (1 << 4) | /* SSI0129 sync */
 100                                 (rsnd_rdai_is_clk_master(rdai) ? 0x2 : 0x1);
 101                         /* fall through */
 102                 case 0x0006: /* SSI0/1/2 */
 103                         val1 = rsnd_rdai_is_clk_master(rdai) ?
 104                                 0xa : 0x5;
 105
 106                         if (!val2)  /* SSI012 sync */
 107                                 val1 |= (1 << 4);
 108                 }
 109         }
 110
 111         rsnd_mod_bset(mod, SSI_MODE1, mask1, val1);
 112         rsnd_mod_bset(mod, SSI_MODE2, mask2, val2);
 113
 114         return 0;
 115 }
 116
 117 static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
 118         .name   = SSIU_NAME,
 119         .init   = rsnd_ssiu_init,
 120 };
 121
 122 static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
 123                                struct rsnd_dai_stream *io,
 124                                struct rsnd_priv *priv)
 125 {
 126         int ret;
 127
 128         ret = rsnd_ssiu_init(mod, io, priv);
 129         if (ret < 0)
 130                 return ret;
 131
 132         if (rsnd_runtime_is_ssi_tdm(io)) {
 133                 /*
 134                  * TDM Extend Mode
 135                  * see
 136                  *      rsnd_ssi_config_init()
 137                  */
 138                 rsnd_mod_write(mod, SSI_MODE, 0x1);
 139         }
 140
 141         if (rsnd_ssi_use_busif(io)) {
 142                 rsnd_mod_write(mod, SSI_BUSIF_ADINR,
 143                                rsnd_get_adinr_bit(mod, io) |
 144                                (rsnd_io_is_play(io) ?
 145                                 rsnd_runtime_channel_after_ctu(io) :
 146                                 rsnd_runtime_channel_original(io)));
 147                 rsnd_mod_write(mod, SSI_BUSIF_MODE,  1);
 148                 rsnd_mod_write(mod, SSI_BUSIF_DALIGN,
 149                                rsnd_get_dalign(mod, io));
 150         }
 151
 152         return 0;
 153 }
 154
 155 static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
 156                                 struct rsnd_dai_stream *io,
 157                                 struct rsnd_priv *priv)
 158 {
 159         if (!rsnd_ssi_use_busif(io))
 160                 return 0;
 161
 162         rsnd_mod_write(mod, SSI_CTRL, 0x1);
 163
 164         if (rsnd_ssi_multi_slaves_runtime(io))
 165                 rsnd_mod_write(mod, SSI_CONTROL, 0x1);
 166
 167         return 0;
 168 }
 169
 170 static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
 171                                struct rsnd_dai_stream *io,
 172                                struct rsnd_priv *priv)
 173 {
 174         if (!rsnd_ssi_use_busif(io))
 175                 return 0;
 176
 177         rsnd_mod_write(mod, SSI_CTRL, 0);
 178
 179         if (rsnd_ssi_multi_slaves_runtime(io))
 180                 rsnd_mod_write(mod, SSI_CONTROL, 0);
 181
 182         return 0;
 183 }
 184
 185 static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
 186         .name   = SSIU_NAME,
 187         .init   = rsnd_ssiu_init_gen2,
 188         .start  = rsnd_ssiu_start_gen2,
 189         .stop   = rsnd_ssiu_stop_gen2,
 190 };
 191
 192 static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
 193 {
 194         if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
 195                 id = 0;
 196
 197         return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
 198 }
 199
 200 int rsnd_ssiu_attach(struct rsnd_dai_stream *io,
 201                      struct rsnd_mod *ssi_mod)
 202 {
 203         struct rsnd_priv *priv = rsnd_io_to_priv(io);
 204         struct rsnd_mod *mod = rsnd_ssiu_mod_get(priv, rsnd_mod_id(ssi_mod));
 205
 206         rsnd_mod_confirm_ssi(ssi_mod);
 207
 208         return rsnd_dai_connect(mod, io, mod->type);
 209 }
 210
 211 int rsnd_ssiu_probe(struct rsnd_priv *priv)
 212 {
 213         struct device *dev = rsnd_priv_to_dev(priv);
 214         struct rsnd_ssiu *ssiu;
 215         static struct rsnd_mod_ops *ops;
 216         int i, nr, ret;
 217
 218         /* same number to SSI */
 219         nr      = priv->ssi_nr;
 220         ssiu    = devm_kzalloc(dev, sizeof(*ssiu) * nr, GFP_KERNEL);
 221         if (!ssiu)
 222                 return -ENOMEM;
 223
 224         priv->ssiu      = ssiu;
 225         priv->ssiu_nr   = nr;
 226
 227         if (rsnd_is_gen1(priv))
 228                 ops = &rsnd_ssiu_ops_gen1;
 229         else
 230                 ops = &rsnd_ssiu_ops_gen2;
 231
 232         for_each_rsnd_ssiu(ssiu, priv, i) {
 233                 ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
 234                                     ops, NULL, rsnd_mod_get_status,
 235                                     RSND_MOD_SSIU, i);
 236                 if (ret)
 237                         return ret;
 238         }
 239
 240         return 0;
 241 }
 242
 243 void rsnd_ssiu_remove(struct rsnd_priv *priv)
 244 {
 245         struct rsnd_ssiu *ssiu;
 246         int i;
 247
 248         for_each_rsnd_ssiu(ssiu, priv, i) {
 249                 rsnd_mod_quit(rsnd_mod_get(ssiu));
 250         }
 251 }