sound/pci/ctxfi/ctamixer.c

   1 /**
   2  * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
   3  *
   4  * This source file is released under GPL v2 license (no other versions).
   5  * See the COPYING file included in the main directory of this source
   6  * distribution for the license terms and conditions.
   7  *
   8  * @File        ctamixer.c
   9  *
  10  * @Brief
  11  * This file contains the implementation of the Audio Mixer
  12  * resource management object.
  13  *
  14  * @Author      Liu Chun
  15  * @Date        May 21 2008
  16  *
  17  */
  18
  19 #include "ctamixer.h"
  20 #include "cthardware.h"
  21 #include <linux/slab.h>
  22
  23 #define AMIXER_RESOURCE_NUM     256
  24 #define SUM_RESOURCE_NUM        256
  25
  26 #define AMIXER_Y_IMMEDIATE      1
  27
  28 #define BLANK_SLOT              4094
  29
  30 static int amixer_master(struct rsc *rsc)
  31 {
  32         rsc->conj = 0;
  33         return rsc->idx = container_of(rsc, struct amixer, rsc)->idx[0];
  34 }
  35
  36 static int amixer_next_conj(struct rsc *rsc)
  37 {
  38         rsc->conj++;
  39         return container_of(rsc, struct amixer, rsc)->idx[rsc->conj];
  40 }
  41
  42 static int amixer_index(const struct rsc *rsc)
  43 {
  44         return container_of(rsc, struct amixer, rsc)->idx[rsc->conj];
  45 }
  46
  47 static int amixer_output_slot(const struct rsc *rsc)
  48 {
  49         return (amixer_index(rsc) << 4) + 0x4;
  50 }
  51
  52 static struct rsc_ops amixer_basic_rsc_ops = {
  53         .master         = amixer_master,
  54         .next_conj      = amixer_next_conj,
  55         .index          = amixer_index,
  56         .output_slot    = amixer_output_slot,
  57 };
  58
  59 static int amixer_set_input(struct amixer *amixer, struct rsc *rsc)
  60 {
  61         struct hw *hw;
  62
  63         hw = amixer->rsc.hw;
  64         hw->amixer_set_mode(amixer->rsc.ctrl_blk, AMIXER_Y_IMMEDIATE);
  65         amixer->input = rsc;
  66         if (NULL == rsc)
  67                 hw->amixer_set_x(amixer->rsc.ctrl_blk, BLANK_SLOT);
  68         else
  69                 hw->amixer_set_x(amixer->rsc.ctrl_blk,
  70                                         rsc->ops->output_slot(rsc));
  71
  72         return 0;
  73 }
  74
  75 /* y is a 14-bit immediate constant */
  76 static int amixer_set_y(struct amixer *amixer, unsigned int y)
  77 {
  78         struct hw *hw;
  79
  80         hw = amixer->rsc.hw;
  81         hw->amixer_set_y(amixer->rsc.ctrl_blk, y);
  82
  83         return 0;
  84 }
  85
  86 static int amixer_set_invalid_squash(struct amixer *amixer, unsigned int iv)
  87 {
  88         struct hw *hw;
  89
  90         hw = amixer->rsc.hw;
  91         hw->amixer_set_iv(amixer->rsc.ctrl_blk, iv);
  92
  93         return 0;
  94 }
  95
  96 static int amixer_set_sum(struct amixer *amixer, struct sum *sum)
  97 {
  98         struct hw *hw;
  99
 100         hw = amixer->rsc.hw;
 101         amixer->sum = sum;
 102         if (NULL == sum) {
 103                 hw->amixer_set_se(amixer->rsc.ctrl_blk, 0);
 104         } else {
 105                 hw->amixer_set_se(amixer->rsc.ctrl_blk, 1);
 106                 hw->amixer_set_sadr(amixer->rsc.ctrl_blk,
 107                                         sum->rsc.ops->index(&sum->rsc));
 108         }
 109
 110         return 0;
 111 }
 112
 113 static int amixer_commit_write(struct amixer *amixer)
 114 {
 115         struct hw *hw;
 116         unsigned int index;
 117         int i;
 118         struct rsc *input;
 119         struct sum *sum;
 120
 121         hw = amixer->rsc.hw;
 122         input = amixer->input;
 123         sum = amixer->sum;
 124
 125         /* Program master and conjugate resources */
 126         amixer->rsc.ops->master(&amixer->rsc);
 127         if (NULL != input)
 128                 input->ops->master(input);
 129
 130         if (NULL != sum)
 131                 sum->rsc.ops->master(&sum->rsc);
 132
 133         for (i = 0; i < amixer->rsc.msr; i++) {
 134                 hw->amixer_set_dirty_all(amixer->rsc.ctrl_blk);
 135                 if (NULL != input) {
 136                         hw->amixer_set_x(amixer->rsc.ctrl_blk,
 137                                                 input->ops->output_slot(input));
 138                         input->ops->next_conj(input);
 139                 }
 140                 if (NULL != sum) {
 141                         hw->amixer_set_sadr(amixer->rsc.ctrl_blk,
 142                                                 sum->rsc.ops->index(&sum->rsc));
 143                         sum->rsc.ops->next_conj(&sum->rsc);
 144                 }
 145                 index = amixer->rsc.ops->output_slot(&amixer->rsc);
 146                 hw->amixer_commit_write(hw, index, amixer->rsc.ctrl_blk);
 147                 amixer->rsc.ops->next_conj(&amixer->rsc);
 148         }
 149         amixer->rsc.ops->master(&amixer->rsc);
 150         if (NULL != input)
 151                 input->ops->master(input);
 152
 153         if (NULL != sum)
 154                 sum->rsc.ops->master(&sum->rsc);
 155
 156         return 0;
 157 }
 158
 159 static int amixer_commit_raw_write(struct amixer *amixer)
 160 {
 161         struct hw *hw;
 162         unsigned int index;
 163
 164         hw = amixer->rsc.hw;
 165         index = amixer->rsc.ops->output_slot(&amixer->rsc);
 166         hw->amixer_commit_write(hw, index, amixer->rsc.ctrl_blk);
 167
 168         return 0;
 169 }
 170
 171 static int amixer_get_y(struct amixer *amixer)
 172 {
 173         struct hw *hw;
 174
 175         hw = amixer->rsc.hw;
 176         return hw->amixer_get_y(amixer->rsc.ctrl_blk);
 177 }
 178
 179 static int amixer_setup(struct amixer *amixer, struct rsc *input,
 180                         unsigned int scale, struct sum *sum)
 181 {
 182         amixer_set_input(amixer, input);
 183         amixer_set_y(amixer, scale);
 184         amixer_set_sum(amixer, sum);
 185         amixer_commit_write(amixer);
 186         return 0;
 187 }
 188
 189 static struct amixer_rsc_ops amixer_ops = {
 190         .set_input              = amixer_set_input,
 191         .set_invalid_squash     = amixer_set_invalid_squash,
 192         .set_scale              = amixer_set_y,
 193         .set_sum                = amixer_set_sum,
 194         .commit_write           = amixer_commit_write,
 195         .commit_raw_write       = amixer_commit_raw_write,
 196         .setup                  = amixer_setup,
 197         .get_scale              = amixer_get_y,
 198 };
 199
 200 static int amixer_rsc_init(struct amixer *amixer,
 201                            const struct amixer_desc *desc,
 202                            struct amixer_mgr *mgr)
 203 {
 204         int err;
 205
 206         err = rsc_init(&amixer->rsc, amixer->idx[0],
 207                         AMIXER, desc->msr, mgr->mgr.hw);
 208         if (err)
 209                 return err;
 210
 211         /* Set amixer specific operations */
 212         amixer->rsc.ops = &amixer_basic_rsc_ops;
 213         amixer->ops = &amixer_ops;
 214         amixer->input = NULL;
 215         amixer->sum = NULL;
 216
 217         amixer_setup(amixer, NULL, 0, NULL);
 218
 219         return 0;
 220 }
 221
 222 static int amixer_rsc_uninit(struct amixer *amixer)
 223 {
 224         amixer_setup(amixer, NULL, 0, NULL);
 225         rsc_uninit(&amixer->rsc);
 226         amixer->ops = NULL;
 227         amixer->input = NULL;
 228         amixer->sum = NULL;
 229         return 0;
 230 }
 231
 232 static int get_amixer_rsc(struct amixer_mgr *mgr,
 233                           const struct amixer_desc *desc,
 234                           struct amixer **ramixer)
 235 {
 236         int err, i;
 237         unsigned int idx;
 238         struct amixer *amixer;
 239         unsigned long flags;
 240
 241         *ramixer = NULL;
 242
 243         /* Allocate mem for amixer resource */
 244         amixer = kzalloc(sizeof(*amixer), GFP_KERNEL);
 245         if (!amixer)
 246                 return -ENOMEM;
 247
 248         /* Check whether there are sufficient
 249          * amixer resources to meet request. */
 250         err = 0;
 251         spin_lock_irqsave(&mgr->mgr_lock, flags);
 252         for (i = 0; i < desc->msr; i++) {
 253                 err = mgr_get_resource(&mgr->mgr, 1, &idx);
 254                 if (err)
 255                         break;
 256
 257                 amixer->idx[i] = idx;
 258         }
 259         spin_unlock_irqrestore(&mgr->mgr_lock, flags);
 260         if (err) {
 261                 printk(KERN_ERR "ctxfi: Can't meet AMIXER resource request!\n");
 262                 goto error;
 263         }
 264
 265         err = amixer_rsc_init(amixer, desc, mgr);
 266         if (err)
 267                 goto error;
 268
 269         *ramixer = amixer;
 270
 271         return 0;
 272
 273 error:
 274         spin_lock_irqsave(&mgr->mgr_lock, flags);
 275         for (i--; i >= 0; i--)
 276                 mgr_put_resource(&mgr->mgr, 1, amixer->idx[i]);
 277
 278         spin_unlock_irqrestore(&mgr->mgr_lock, flags);
 279         kfree(amixer);
 280         return err;
 281 }
 282
 283 static int put_amixer_rsc(struct amixer_mgr *mgr, struct amixer *amixer)
 284 {
 285         unsigned long flags;
 286         int i;
 287
 288         spin_lock_irqsave(&mgr->mgr_lock, flags);
 289         for (i = 0; i < amixer->rsc.msr; i++)
 290                 mgr_put_resource(&mgr->mgr, 1, amixer->idx[i]);
 291
 292         spin_unlock_irqrestore(&mgr->mgr_lock, flags);
 293         amixer_rsc_uninit(amixer);
 294         kfree(amixer);
 295
 296         return 0;
 297 }
 298
 299 int amixer_mgr_create(void *hw, struct amixer_mgr **ramixer_mgr)
 300 {
 301         int err;
 302         struct amixer_mgr *amixer_mgr;
 303
 304         *ramixer_mgr = NULL;
 305         amixer_mgr = kzalloc(sizeof(*amixer_mgr), GFP_KERNEL);
 306         if (NULL == amixer_mgr)
 307                 return -ENOMEM;
 308
 309         err = rsc_mgr_init(&amixer_mgr->mgr, AMIXER, AMIXER_RESOURCE_NUM, hw);
 310         if (err)
 311                 goto error;
 312
 313         spin_lock_init(&amixer_mgr->mgr_lock);
 314
 315         amixer_mgr->get_amixer = get_amixer_rsc;
 316         amixer_mgr->put_amixer = put_amixer_rsc;
 317
 318         *ramixer_mgr = amixer_mgr;
 319
 320         return 0;
 321
 322 error:
 323         kfree(amixer_mgr);
 324         return err;
 325 }
 326
 327 int amixer_mgr_destroy(struct amixer_mgr *amixer_mgr)
 328 {
 329         rsc_mgr_uninit(&amixer_mgr->mgr);
 330         kfree(amixer_mgr);
 331         return 0;
 332 }
 333
 334 /* SUM resource management */
 335
 336 static int sum_master(struct rsc *rsc)
 337 {
 338         rsc->conj = 0;
 339         return rsc->idx = container_of(rsc, struct sum, rsc)->idx[0];
 340 }
 341
 342 static int sum_next_conj(struct rsc *rsc)
 343 {
 344         rsc->conj++;
 345         return container_of(rsc, struct sum, rsc)->idx[rsc->conj];
 346 }
 347
 348 static int sum_index(const struct rsc *rsc)
 349 {
 350         return container_of(rsc, struct sum, rsc)->idx[rsc->conj];
 351 }
 352
 353 static int sum_output_slot(const struct rsc *rsc)
 354 {
 355         return (sum_index(rsc) << 4) + 0xc;
 356 }
 357
 358 static struct rsc_ops sum_basic_rsc_ops = {
 359         .master         = sum_master,
 360         .next_conj      = sum_next_conj,
 361         .index          = sum_index,
 362         .output_slot    = sum_output_slot,
 363 };
 364
 365 static int sum_rsc_init(struct sum *sum,
 366                         const struct sum_desc *desc,
 367                         struct sum_mgr *mgr)
 368 {
 369         int err;
 370
 371         err = rsc_init(&sum->rsc, sum->idx[0], SUM, desc->msr, mgr->mgr.hw);
 372         if (err)
 373                 return err;
 374
 375         sum->rsc.ops = &sum_basic_rsc_ops;
 376
 377         return 0;
 378 }
 379
 380 static int sum_rsc_uninit(struct sum *sum)
 381 {
 382         rsc_uninit(&sum->rsc);
 383         return 0;
 384 }
 385
 386 static int get_sum_rsc(struct sum_mgr *mgr,
 387                        const struct sum_desc *desc,
 388                        struct sum **rsum)
 389 {
 390         int err, i;
 391         unsigned int idx;
 392         struct sum *sum;
 393         unsigned long flags;
 394
 395         *rsum = NULL;
 396
 397         /* Allocate mem for sum resource */
 398         sum = kzalloc(sizeof(*sum), GFP_KERNEL);
 399         if (!sum)
 400                 return -ENOMEM;
 401
 402         /* Check whether there are sufficient sum resources to meet request. */
 403         err = 0;
 404         spin_lock_irqsave(&mgr->mgr_lock, flags);
 405         for (i = 0; i < desc->msr; i++) {
 406                 err = mgr_get_resource(&mgr->mgr, 1, &idx);
 407                 if (err)
 408                         break;
 409
 410                 sum->idx[i] = idx;
 411         }
 412         spin_unlock_irqrestore(&mgr->mgr_lock, flags);
 413         if (err) {
 414                 printk(KERN_ERR "ctxfi: Can't meet SUM resource request!\n");
 415                 goto error;
 416         }
 417
 418         err = sum_rsc_init(sum, desc, mgr);
 419         if (err)
 420                 goto error;
 421
 422         *rsum = sum;
 423
 424         return 0;
 425
 426 error:
 427         spin_lock_irqsave(&mgr->mgr_lock, flags);
 428         for (i--; i >= 0; i--)
 429                 mgr_put_resource(&mgr->mgr, 1, sum->idx[i]);
 430
 431         spin_unlock_irqrestore(&mgr->mgr_lock, flags);
 432         kfree(sum);
 433         return err;
 434 }
 435
 436 static int put_sum_rsc(struct sum_mgr *mgr, struct sum *sum)
 437 {
 438         unsigned long flags;
 439         int i;
 440
 441         spin_lock_irqsave(&mgr->mgr_lock, flags);
 442         for (i = 0; i < sum->rsc.msr; i++)
 443                 mgr_put_resource(&mgr->mgr, 1, sum->idx[i]);
 444
 445         spin_unlock_irqrestore(&mgr->mgr_lock, flags);
 446         sum_rsc_uninit(sum);
 447         kfree(sum);
 448
 449         return 0;
 450 }
 451
 452 int sum_mgr_create(void *hw, struct sum_mgr **rsum_mgr)
 453 {
 454         int err;
 455         struct sum_mgr *sum_mgr;
 456
 457         *rsum_mgr = NULL;
 458         sum_mgr = kzalloc(sizeof(*sum_mgr), GFP_KERNEL);
 459         if (NULL == sum_mgr)
 460                 return -ENOMEM;
 461
 462         err = rsc_mgr_init(&sum_mgr->mgr, SUM, SUM_RESOURCE_NUM, hw);
 463         if (err)
 464                 goto error;
 465
 466         spin_lock_init(&sum_mgr->mgr_lock);
 467
 468         sum_mgr->get_sum = get_sum_rsc;
 469         sum_mgr->put_sum = put_sum_rsc;
 470
 471         *rsum_mgr = sum_mgr;
 472
 473         return 0;
 474
 475 error:
 476         kfree(sum_mgr);
 477         return err;
 478 }
 479
 480 int sum_mgr_destroy(struct sum_mgr *sum_mgr)
 481 {
 482         rsc_mgr_uninit(&sum_mgr->mgr);
 483         kfree(sum_mgr);
 484         return 0;
 485 }
 486