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, 148 rsnd_get_busif_shift(io, mod) | 1); 149 rsnd_mod_write(mod, SSI_BUSIF_DALIGN, 150 rsnd_get_dalign(mod, io)); 151 } 152 153 return 0; 154 } 155 156 static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod, 157 struct rsnd_dai_stream *io, 158 struct rsnd_priv *priv) 159 { 160 if (!rsnd_ssi_use_busif(io)) 161 return 0; 162 163 rsnd_mod_write(mod, SSI_CTRL, 0x1); 164 165 if (rsnd_ssi_multi_slaves_runtime(io)) 166 rsnd_mod_write(mod, SSI_CONTROL, 0x1); 167 168 return 0; 169 } 170 171 static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod, 172 struct rsnd_dai_stream *io, 173 struct rsnd_priv *priv) 174 { 175 if (!rsnd_ssi_use_busif(io)) 176 return 0; 177 178 rsnd_mod_write(mod, SSI_CTRL, 0); 179 180 if (rsnd_ssi_multi_slaves_runtime(io)) 181 rsnd_mod_write(mod, SSI_CONTROL, 0); 182 183 return 0; 184 } 185 186 static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = { 187 .name = SSIU_NAME, 188 .init = rsnd_ssiu_init_gen2, 189 .start = rsnd_ssiu_start_gen2, 190 .stop = rsnd_ssiu_stop_gen2, 191 }; 192 193 static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id) 194 { 195 if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv))) 196 id = 0; 197 198 return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id); 199 } 200 201 int rsnd_ssiu_attach(struct rsnd_dai_stream *io, 202 struct rsnd_mod *ssi_mod) 203 { 204 struct rsnd_priv *priv = rsnd_io_to_priv(io); 205 struct rsnd_mod *mod = rsnd_ssiu_mod_get(priv, rsnd_mod_id(ssi_mod)); 206 207 rsnd_mod_confirm_ssi(ssi_mod); 208 209 return rsnd_dai_connect(mod, io, mod->type); 210 } 211 212 int rsnd_ssiu_probe(struct rsnd_priv *priv) 213 { 214 struct device *dev = rsnd_priv_to_dev(priv); 215 struct rsnd_ssiu *ssiu; 216 static struct rsnd_mod_ops *ops; 217 int i, nr, ret; 218 219 /* same number to SSI */ 220 nr = priv->ssi_nr; 221 ssiu = devm_kzalloc(dev, sizeof(*ssiu) * nr, GFP_KERNEL); 222 if (!ssiu) 223 return -ENOMEM; 224 225 priv->ssiu = ssiu; 226 priv->ssiu_nr = nr; 227 228 if (rsnd_is_gen1(priv)) 229 ops = &rsnd_ssiu_ops_gen1; 230 else 231 ops = &rsnd_ssiu_ops_gen2; 232 233 for_each_rsnd_ssiu(ssiu, priv, i) { 234 ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu), 235 ops, NULL, rsnd_mod_get_status, 236 RSND_MOD_SSIU, i); 237 if (ret) 238 return ret; 239 } 240 241 return 0; 242 } 243 244 void rsnd_ssiu_remove(struct rsnd_priv *priv) 245 { 246 struct rsnd_ssiu *ssiu; 247 int i; 248 249 for_each_rsnd_ssiu(ssiu, priv, i) { 250 rsnd_mod_quit(rsnd_mod_get(ssiu)); 251 } 252 } 253