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 (rsnd_ssi_is_pin_sharing(io)) {
  68                 int shift = -1;
  69
  70                 switch (id) {
  71                 case 1:
  72                         shift = 0;
  73                         break;
  74                 case 2:
  75                         shift = 2;
  76                         break;
  77                 case 4:
  78                         shift = 16;
  79                         break;
  80                 default:
  81                         return -EINVAL;
  82                 }
  83
  84                 mask1 |= 0x3 << shift;
  85                 val1 = rsnd_rdai_is_clk_master(rdai) ?
  86                         0x2 << shift : 0x1 << shift;
  87
  88         } else if (multi_ssi_slaves) {
  89
  90                 mask2 |= 0x00000007;
  91                 mask1 |= 0x0000000f;
  92
  93                 switch (multi_ssi_slaves) {
  94                 case 0x0206: /* SSI0/1/2/9 */
  95                         val2 = (1 << 4) | /* SSI0129 sync */
  96                                 (rsnd_rdai_is_clk_master(rdai) ? 0x2 : 0x1);
  97                         /* fall through */
  98                 case 0x0006: /* SSI0/1/2 */
  99                         val1 = rsnd_rdai_is_clk_master(rdai) ?
 100                                 0xa : 0x5;
 101
 102                         if (!val2)  /* SSI012 sync */
 103                                 val1 |= (1 << 4);
 104                 }
 105         }
 106
 107         rsnd_mod_bset(mod, SSI_MODE1, mask1, val1);
 108         rsnd_mod_bset(mod, SSI_MODE2, mask2, val2);
 109
 110         return 0;
 111 }
 112
 113 static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
 114         .name   = SSIU_NAME,
 115         .init   = rsnd_ssiu_init,
 116 };
 117
 118 static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
 119                                struct rsnd_dai_stream *io,
 120                                struct rsnd_priv *priv)
 121 {
 122         int ret;
 123
 124         ret = rsnd_ssiu_init(mod, io, priv);
 125         if (ret < 0)
 126                 return ret;
 127
 128         if (rsnd_runtime_is_ssi_tdm(io)) {
 129                 /*
 130                  * TDM Extend Mode
 131                  * see
 132                  *      rsnd_ssi_config_init()
 133                  */
 134                 rsnd_mod_write(mod, SSI_MODE, 0x1);
 135         }
 136
 137         if (rsnd_ssi_use_busif(io)) {
 138                 rsnd_mod_write(mod, SSI_BUSIF_ADINR,
 139                                rsnd_get_adinr_bit(mod, io) |
 140                                (rsnd_io_is_play(io) ?
 141                                 rsnd_runtime_channel_after_ctu(io) :
 142                                 rsnd_runtime_channel_original(io)));
 143                 rsnd_mod_write(mod, SSI_BUSIF_MODE,  1);
 144                 rsnd_mod_write(mod, SSI_BUSIF_DALIGN,
 145                                rsnd_get_dalign(mod, io));
 146         }
 147
 148         return 0;
 149 }
 150
 151 static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
 152                                 struct rsnd_dai_stream *io,
 153                                 struct rsnd_priv *priv)
 154 {
 155         if (!rsnd_ssi_use_busif(io))
 156                 return 0;
 157
 158         rsnd_mod_write(mod, SSI_CTRL, 0x1);
 159
 160         if (rsnd_ssi_multi_slaves_runtime(io))
 161                 rsnd_mod_write(mod, SSI_CONTROL, 0x1);
 162
 163         return 0;
 164 }
 165
 166 static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
 167                                struct rsnd_dai_stream *io,
 168                                struct rsnd_priv *priv)
 169 {
 170         if (!rsnd_ssi_use_busif(io))
 171                 return 0;
 172
 173         rsnd_mod_write(mod, SSI_CTRL, 0);
 174
 175         if (rsnd_ssi_multi_slaves_runtime(io))
 176                 rsnd_mod_write(mod, SSI_CONTROL, 0);
 177
 178         return 0;
 179 }
 180
 181 static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
 182         .name   = SSIU_NAME,
 183         .init   = rsnd_ssiu_init_gen2,
 184         .start  = rsnd_ssiu_start_gen2,
 185         .stop   = rsnd_ssiu_stop_gen2,
 186 };
 187
 188 static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
 189 {
 190         if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
 191                 id = 0;
 192
 193         return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
 194 }
 195
 196 int rsnd_ssiu_attach(struct rsnd_dai_stream *io,
 197                      struct rsnd_mod *ssi_mod)
 198 {
 199         struct rsnd_priv *priv = rsnd_io_to_priv(io);
 200         struct rsnd_mod *mod = rsnd_ssiu_mod_get(priv, rsnd_mod_id(ssi_mod));
 201
 202         rsnd_mod_confirm_ssi(ssi_mod);
 203
 204         return rsnd_dai_connect(mod, io, mod->type);
 205 }
 206
 207 int rsnd_ssiu_probe(struct rsnd_priv *priv)
 208 {
 209         struct device *dev = rsnd_priv_to_dev(priv);
 210         struct rsnd_ssiu *ssiu;
 211         static struct rsnd_mod_ops *ops;
 212         int i, nr, ret;
 213
 214         /* same number to SSI */
 215         nr      = priv->ssi_nr;
 216         ssiu    = devm_kzalloc(dev, sizeof(*ssiu) * nr, GFP_KERNEL);
 217         if (!ssiu)
 218                 return -ENOMEM;
 219
 220         priv->ssiu      = ssiu;
 221         priv->ssiu_nr   = nr;
 222
 223         if (rsnd_is_gen1(priv))
 224                 ops = &rsnd_ssiu_ops_gen1;
 225         else
 226                 ops = &rsnd_ssiu_ops_gen2;
 227
 228         for_each_rsnd_ssiu(ssiu, priv, i) {
 229                 ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
 230                                     ops, NULL, rsnd_mod_get_status,
 231                                     RSND_MOD_SSIU, i);
 232                 if (ret)
 233                         return ret;
 234         }
 235
 236         return 0;
 237 }
 238
 239 void rsnd_ssiu_remove(struct rsnd_priv *priv)
 240 {
 241         struct rsnd_ssiu *ssiu;
 242         int i;
 243
 244         for_each_rsnd_ssiu(ssiu, priv, i) {
 245                 rsnd_mod_quit(rsnd_mod_get(ssiu));
 246         }
 247 }