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 } 248