1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Renesas R-Car DVC support 4 // 5 // Copyright (C) 2014 Renesas Solutions Corp. 6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 7 8 /* 9 * Playback Volume 10 * amixer set "DVC Out" 100% 11 * 12 * Capture Volume 13 * amixer set "DVC In" 100% 14 * 15 * Playback Mute 16 * amixer set "DVC Out Mute" on 17 * 18 * Capture Mute 19 * amixer set "DVC In Mute" on 20 * 21 * Volume Ramp 22 * amixer set "DVC Out Ramp Up Rate" "0.125 dB/64 steps" 23 * amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps" 24 * amixer set "DVC Out Ramp" on 25 * aplay xxx.wav & 26 * amixer set "DVC Out" 80% // Volume Down 27 * amixer set "DVC Out" 100% // Volume Up 28 */ 29 30 #include "rsnd.h" 31 32 #define RSND_DVC_NAME_SIZE 16 33 34 #define DVC_NAME "dvc" 35 36 struct rsnd_dvc { 37 struct rsnd_mod mod; 38 struct rsnd_kctrl_cfg_m volume; 39 struct rsnd_kctrl_cfg_m mute; 40 struct rsnd_kctrl_cfg_s ren; /* Ramp Enable */ 41 struct rsnd_kctrl_cfg_s rup; /* Ramp Rate Up */ 42 struct rsnd_kctrl_cfg_s rdown; /* Ramp Rate Down */ 43 }; 44 45 #define rsnd_dvc_get(priv, id) ((struct rsnd_dvc *)(priv->dvc) + id) 46 #define rsnd_dvc_nr(priv) ((priv)->dvc_nr) 47 48 #define rsnd_mod_to_dvc(_mod) \ 49 container_of((_mod), struct rsnd_dvc, mod) 50 51 #define for_each_rsnd_dvc(pos, priv, i) \ 52 for ((i) = 0; \ 53 ((i) < rsnd_dvc_nr(priv)) && \ 54 ((pos) = (struct rsnd_dvc *)(priv)->dvc + i); \ 55 i++) 56 57 static void rsnd_dvc_activation(struct rsnd_mod *mod) 58 { 59 rsnd_mod_write(mod, DVC_SWRSR, 0); 60 rsnd_mod_write(mod, DVC_SWRSR, 1); 61 } 62 63 static void rsnd_dvc_halt(struct rsnd_mod *mod) 64 { 65 rsnd_mod_write(mod, DVC_DVUIR, 1); 66 rsnd_mod_write(mod, DVC_SWRSR, 0); 67 } 68 69 #define rsnd_dvc_get_vrpdr(dvc) (rsnd_kctrl_vals(dvc->rup) << 8 | \ 70 rsnd_kctrl_vals(dvc->rdown)) 71 #define rsnd_dvc_get_vrdbr(dvc) (0x3ff - (rsnd_kctrl_valm(dvc->volume, 0) >> 13)) 72 73 static void rsnd_dvc_volume_parameter(struct rsnd_dai_stream *io, 74 struct rsnd_mod *mod) 75 { 76 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod); 77 u32 val[RSND_MAX_CHANNELS]; 78 int i; 79 80 /* Enable Ramp */ 81 if (rsnd_kctrl_vals(dvc->ren)) 82 for (i = 0; i < RSND_MAX_CHANNELS; i++) 83 val[i] = rsnd_kctrl_max(dvc->volume); 84 else 85 for (i = 0; i < RSND_MAX_CHANNELS; i++) 86 val[i] = rsnd_kctrl_valm(dvc->volume, i); 87 88 /* Enable Digital Volume */ 89 for (i = 0; i < RSND_MAX_CHANNELS; i++) 90 rsnd_mod_write(mod, DVC_VOLxR(i), val[i]); 91 } 92 93 static void rsnd_dvc_volume_init(struct rsnd_dai_stream *io, 94 struct rsnd_mod *mod) 95 { 96 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod); 97 u32 adinr = 0; 98 u32 dvucr = 0; 99 u32 vrctr = 0; 100 u32 vrpdr = 0; 101 u32 vrdbr = 0; 102 103 adinr = rsnd_get_adinr_bit(mod, io) | 104 rsnd_runtime_channel_after_ctu(io); 105 106 /* Enable Digital Volume, Zero Cross Mute Mode */ 107 dvucr |= 0x101; 108 109 /* Enable Ramp */ 110 if (rsnd_kctrl_vals(dvc->ren)) { 111 dvucr |= 0x10; 112 113 /* 114 * FIXME !! 115 * use scale-downed Digital Volume 116 * as Volume Ramp 117 * 7F FFFF -> 3FF 118 */ 119 vrctr = 0xff; 120 vrpdr = rsnd_dvc_get_vrpdr(dvc); 121 vrdbr = rsnd_dvc_get_vrdbr(dvc); 122 } 123 124 /* Initialize operation */ 125 rsnd_mod_write(mod, DVC_DVUIR, 1); 126 127 /* General Information */ 128 rsnd_mod_write(mod, DVC_ADINR, adinr); 129 rsnd_mod_write(mod, DVC_DVUCR, dvucr); 130 131 /* Volume Ramp Parameter */ 132 rsnd_mod_write(mod, DVC_VRCTR, vrctr); 133 rsnd_mod_write(mod, DVC_VRPDR, vrpdr); 134 rsnd_mod_write(mod, DVC_VRDBR, vrdbr); 135 136 /* Digital Volume Function Parameter */ 137 rsnd_dvc_volume_parameter(io, mod); 138 139 /* cancel operation */ 140 rsnd_mod_write(mod, DVC_DVUIR, 0); 141 } 142 143 static void rsnd_dvc_volume_update(struct rsnd_dai_stream *io, 144 struct rsnd_mod *mod) 145 { 146 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod); 147 u32 zcmcr = 0; 148 u32 vrpdr = 0; 149 u32 vrdbr = 0; 150 int i; 151 152 for (i = 0; i < rsnd_kctrl_size(dvc->mute); i++) 153 zcmcr |= (!!rsnd_kctrl_valm(dvc->mute, i)) << i; 154 155 if (rsnd_kctrl_vals(dvc->ren)) { 156 vrpdr = rsnd_dvc_get_vrpdr(dvc); 157 vrdbr = rsnd_dvc_get_vrdbr(dvc); 158 } 159 160 /* Disable DVC Register access */ 161 rsnd_mod_write(mod, DVC_DVUER, 0); 162 163 /* Zero Cross Mute Function */ 164 rsnd_mod_write(mod, DVC_ZCMCR, zcmcr); 165 166 /* Volume Ramp Function */ 167 rsnd_mod_write(mod, DVC_VRPDR, vrpdr); 168 rsnd_mod_write(mod, DVC_VRDBR, vrdbr); 169 /* add DVC_VRWTR here */ 170 171 /* Digital Volume Function Parameter */ 172 rsnd_dvc_volume_parameter(io, mod); 173 174 /* Enable DVC Register access */ 175 rsnd_mod_write(mod, DVC_DVUER, 1); 176 } 177 178 static int rsnd_dvc_probe_(struct rsnd_mod *mod, 179 struct rsnd_dai_stream *io, 180 struct rsnd_priv *priv) 181 { 182 return rsnd_cmd_attach(io, rsnd_mod_id(mod)); 183 } 184 185 static int rsnd_dvc_init(struct rsnd_mod *mod, 186 struct rsnd_dai_stream *io, 187 struct rsnd_priv *priv) 188 { 189 rsnd_mod_power_on(mod); 190 191 rsnd_dvc_activation(mod); 192 193 rsnd_dvc_volume_init(io, mod); 194 195 rsnd_dvc_volume_update(io, mod); 196 197 return 0; 198 } 199 200 static int rsnd_dvc_quit(struct rsnd_mod *mod, 201 struct rsnd_dai_stream *io, 202 struct rsnd_priv *priv) 203 { 204 rsnd_dvc_halt(mod); 205 206 rsnd_mod_power_off(mod); 207 208 return 0; 209 } 210 211 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod, 212 struct rsnd_dai_stream *io, 213 struct snd_soc_pcm_runtime *rtd) 214 { 215 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod); 216 struct rsnd_dai *rdai = rsnd_io_to_rdai(io); 217 int is_play = rsnd_io_is_play(io); 218 int channels = rsnd_rdai_channels_get(rdai); 219 int ret; 220 221 /* Volume */ 222 ret = rsnd_kctrl_new_m(mod, io, rtd, 223 is_play ? 224 "DVC Out Playback Volume" : "DVC In Capture Volume", 225 rsnd_kctrl_accept_anytime, 226 rsnd_dvc_volume_update, 227 &dvc->volume, channels, 228 0x00800000 - 1); 229 if (ret < 0) 230 return ret; 231 232 /* Mute */ 233 ret = rsnd_kctrl_new_m(mod, io, rtd, 234 is_play ? 235 "DVC Out Mute Switch" : "DVC In Mute Switch", 236 rsnd_kctrl_accept_anytime, 237 rsnd_dvc_volume_update, 238 &dvc->mute, channels, 239 1); 240 if (ret < 0) 241 return ret; 242 243 /* Ramp */ 244 ret = rsnd_kctrl_new_s(mod, io, rtd, 245 is_play ? 246 "DVC Out Ramp Switch" : "DVC In Ramp Switch", 247 rsnd_kctrl_accept_anytime, 248 rsnd_dvc_volume_update, 249 &dvc->ren, 1); 250 if (ret < 0) 251 return ret; 252 253 ret = rsnd_kctrl_new_e(mod, io, rtd, 254 is_play ? 255 "DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate", 256 rsnd_kctrl_accept_anytime, 257 rsnd_dvc_volume_update, 258 &dvc->rup, 259 volume_ramp_rate, 260 VOLUME_RAMP_MAX_DVC); 261 if (ret < 0) 262 return ret; 263 264 ret = rsnd_kctrl_new_e(mod, io, rtd, 265 is_play ? 266 "DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate", 267 rsnd_kctrl_accept_anytime, 268 rsnd_dvc_volume_update, 269 &dvc->rdown, 270 volume_ramp_rate, 271 VOLUME_RAMP_MAX_DVC); 272 273 if (ret < 0) 274 return ret; 275 276 return 0; 277 } 278 279 static struct dma_chan *rsnd_dvc_dma_req(struct rsnd_dai_stream *io, 280 struct rsnd_mod *mod) 281 { 282 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 283 284 return rsnd_dma_request_channel(rsnd_dvc_of_node(priv), 285 DVC_NAME, mod, "tx"); 286 } 287 288 #ifdef CONFIG_DEBUG_FS 289 static void rsnd_dvc_debug_info(struct seq_file *m, 290 struct rsnd_dai_stream *io, 291 struct rsnd_mod *mod) 292 { 293 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU, 294 0xe00 + rsnd_mod_id(mod) * 0x100, 0x60); 295 } 296 #define DEBUG_INFO .debug_info = rsnd_dvc_debug_info 297 #else 298 #define DEBUG_INFO 299 #endif 300 301 static struct rsnd_mod_ops rsnd_dvc_ops = { 302 .name = DVC_NAME, 303 .dma_req = rsnd_dvc_dma_req, 304 .probe = rsnd_dvc_probe_, 305 .init = rsnd_dvc_init, 306 .quit = rsnd_dvc_quit, 307 .pcm_new = rsnd_dvc_pcm_new, 308 .get_status = rsnd_mod_get_status, 309 DEBUG_INFO 310 }; 311 312 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id) 313 { 314 if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv))) 315 id = 0; 316 317 return rsnd_mod_get(rsnd_dvc_get(priv, id)); 318 } 319 320 int rsnd_dvc_probe(struct rsnd_priv *priv) 321 { 322 struct device_node *node; 323 struct device_node *np; 324 struct device *dev = rsnd_priv_to_dev(priv); 325 struct rsnd_dvc *dvc; 326 struct clk *clk; 327 char name[RSND_DVC_NAME_SIZE]; 328 int i, nr, ret; 329 330 /* This driver doesn't support Gen1 at this point */ 331 if (rsnd_is_gen1(priv)) 332 return 0; 333 334 node = rsnd_dvc_of_node(priv); 335 if (!node) 336 return 0; /* not used is not error */ 337 338 nr = of_get_child_count(node); 339 if (!nr) { 340 ret = -EINVAL; 341 goto rsnd_dvc_probe_done; 342 } 343 344 dvc = devm_kcalloc(dev, nr, sizeof(*dvc), GFP_KERNEL); 345 if (!dvc) { 346 ret = -ENOMEM; 347 goto rsnd_dvc_probe_done; 348 } 349 350 priv->dvc_nr = nr; 351 priv->dvc = dvc; 352 353 i = 0; 354 ret = 0; 355 for_each_child_of_node(node, np) { 356 dvc = rsnd_dvc_get(priv, i); 357 358 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d", 359 DVC_NAME, i); 360 361 clk = devm_clk_get(dev, name); 362 if (IS_ERR(clk)) { 363 ret = PTR_ERR(clk); 364 of_node_put(np); 365 goto rsnd_dvc_probe_done; 366 } 367 368 ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops, 369 clk, RSND_MOD_DVC, i); 370 if (ret) { 371 of_node_put(np); 372 goto rsnd_dvc_probe_done; 373 } 374 375 i++; 376 } 377 378 rsnd_dvc_probe_done: 379 of_node_put(node); 380 381 return ret; 382 } 383 384 void rsnd_dvc_remove(struct rsnd_priv *priv) 385 { 386 struct rsnd_dvc *dvc; 387 int i; 388 389 for_each_rsnd_dvc(dvc, priv, i) { 390 rsnd_mod_quit(rsnd_mod_get(dvc)); 391 } 392 } 393