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 /* 37 * SSI_MODE0 38 */ 39 rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id); 40 41 /* 42 * SSI_MODE1 43 */ 44 mask1 = (1 << 4) | (1 << 20); /* mask sync bit */ 45 mask2 = (1 << 4); /* mask sync bit */ 46 val1 = val2 = 0; 47 if (rsnd_ssi_is_pin_sharing(io)) { 48 int shift = -1; 49 50 switch (id) { 51 case 1: 52 shift = 0; 53 break; 54 case 2: 55 shift = 2; 56 break; 57 case 4: 58 shift = 16; 59 break; 60 default: 61 return -EINVAL; 62 } 63 64 mask1 |= 0x3 << shift; 65 val1 = rsnd_rdai_is_clk_master(rdai) ? 66 0x2 << shift : 0x1 << shift; 67 68 } else if (multi_ssi_slaves) { 69 70 mask2 |= 0x00000007; 71 mask1 |= 0x0000000f; 72 73 switch (multi_ssi_slaves) { 74 case 0x0206: /* SSI0/1/2/9 */ 75 val2 = (1 << 4) | /* SSI0129 sync */ 76 (rsnd_rdai_is_clk_master(rdai) ? 0x2 : 0x1); 77 /* fall through */ 78 case 0x0006: /* SSI0/1/2 */ 79 val1 = rsnd_rdai_is_clk_master(rdai) ? 80 0xa : 0x5; 81 82 if (!val2) /* SSI012 sync */ 83 val1 |= (1 << 4); 84 } 85 } 86 87 rsnd_mod_bset(mod, SSI_MODE1, mask1, val1); 88 rsnd_mod_bset(mod, SSI_MODE2, mask2, val2); 89 90 return 0; 91 } 92 93 static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = { 94 .name = SSIU_NAME, 95 .init = rsnd_ssiu_init, 96 }; 97 98 static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod, 99 struct rsnd_dai_stream *io, 100 struct rsnd_priv *priv) 101 { 102 int ret; 103 104 ret = rsnd_ssiu_init(mod, io, priv); 105 if (ret < 0) 106 return ret; 107 108 if (rsnd_runtime_is_ssi_tdm(io)) { 109 /* 110 * TDM Extend Mode 111 * see 112 * rsnd_ssi_config_init() 113 */ 114 rsnd_mod_write(mod, SSI_MODE, 0x1); 115 } 116 117 if (rsnd_ssi_use_busif(io)) { 118 rsnd_mod_write(mod, SSI_BUSIF_ADINR, 119 rsnd_get_adinr_bit(mod, io) | 120 (rsnd_io_is_play(io) ? 121 rsnd_runtime_channel_after_ctu(io) : 122 rsnd_runtime_channel_original(io))); 123 rsnd_mod_write(mod, SSI_BUSIF_MODE, 1); 124 rsnd_mod_write(mod, SSI_BUSIF_DALIGN, 125 rsnd_get_dalign(mod, io)); 126 } 127 128 return 0; 129 } 130 131 static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod, 132 struct rsnd_dai_stream *io, 133 struct rsnd_priv *priv) 134 { 135 if (!rsnd_ssi_use_busif(io)) 136 return 0; 137 138 rsnd_mod_write(mod, SSI_CTRL, 0x1); 139 140 if (rsnd_ssi_multi_slaves_runtime(io)) 141 rsnd_mod_write(mod, SSI_CONTROL, 0x1); 142 143 return 0; 144 } 145 146 static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod, 147 struct rsnd_dai_stream *io, 148 struct rsnd_priv *priv) 149 { 150 if (!rsnd_ssi_use_busif(io)) 151 return 0; 152 153 rsnd_mod_write(mod, SSI_CTRL, 0); 154 155 if (rsnd_ssi_multi_slaves_runtime(io)) 156 rsnd_mod_write(mod, SSI_CONTROL, 0); 157 158 return 0; 159 } 160 161 static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = { 162 .name = SSIU_NAME, 163 .init = rsnd_ssiu_init_gen2, 164 .start = rsnd_ssiu_start_gen2, 165 .stop = rsnd_ssiu_stop_gen2, 166 }; 167 168 static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id) 169 { 170 if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv))) 171 id = 0; 172 173 return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id); 174 } 175 176 int rsnd_ssiu_attach(struct rsnd_dai_stream *io, 177 struct rsnd_mod *ssi_mod) 178 { 179 struct rsnd_priv *priv = rsnd_io_to_priv(io); 180 struct rsnd_mod *mod = rsnd_ssiu_mod_get(priv, rsnd_mod_id(ssi_mod)); 181 182 rsnd_mod_confirm_ssi(ssi_mod); 183 184 return rsnd_dai_connect(mod, io, mod->type); 185 } 186 187 int rsnd_ssiu_probe(struct rsnd_priv *priv) 188 { 189 struct device *dev = rsnd_priv_to_dev(priv); 190 struct rsnd_ssiu *ssiu; 191 static struct rsnd_mod_ops *ops; 192 int i, nr, ret; 193 194 /* same number to SSI */ 195 nr = priv->ssi_nr; 196 ssiu = devm_kzalloc(dev, sizeof(*ssiu) * nr, GFP_KERNEL); 197 if (!ssiu) 198 return -ENOMEM; 199 200 priv->ssiu = ssiu; 201 priv->ssiu_nr = nr; 202 203 if (rsnd_is_gen1(priv)) 204 ops = &rsnd_ssiu_ops_gen1; 205 else 206 ops = &rsnd_ssiu_ops_gen2; 207 208 for_each_rsnd_ssiu(ssiu, priv, i) { 209 ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu), 210 ops, NULL, rsnd_mod_get_status, 211 RSND_MOD_SSIU, i); 212 if (ret) 213 return ret; 214 } 215 216 return 0; 217 } 218 219 void rsnd_ssiu_remove(struct rsnd_priv *priv) 220 { 221 struct rsnd_ssiu *ssiu; 222 int i; 223 224 for_each_rsnd_ssiu(ssiu, priv, i) { 225 rsnd_mod_quit(rsnd_mod_get(ssiu)); 226 } 227 } 228