ctamixer.c 9.79 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490
/**
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 *
 * This source file is released under GPL v2 license (no other versions).
 * See the COPYING file included in the main directory of this source
 * distribution for the license terms and conditions.
 *
 * @File	ctamixer.c
 *
 * @Brief
 * This file contains the implementation of the Audio Mixer
 * resource management object.
 *
 * @Author	Liu Chun
 * @Date 	May 21 2008
 *
 */

#include "ctamixer.h"
#include "cthardware.h"
#include <linux/slab.h>

#define AMIXER_RESOURCE_NUM	256
#define SUM_RESOURCE_NUM	256

#define AMIXER_Y_IMMEDIATE	1

#define BLANK_SLOT		4094

static int amixer_master(struct rsc *rsc)
{
	rsc->conj = 0;
	return rsc->idx = container_of(rsc, struct amixer, rsc)->idx[0];
}

static int amixer_next_conj(struct rsc *rsc)
{
	rsc->conj++;
	return container_of(rsc, struct amixer, rsc)->idx[rsc->conj];
}

static int amixer_index(const struct rsc *rsc)
{
	return container_of(rsc, struct amixer, rsc)->idx[rsc->conj];
}

static int amixer_output_slot(const struct rsc *rsc)
{
	return (amixer_index(rsc) << 4) + 0x4;
}

static const struct rsc_ops amixer_basic_rsc_ops = {
	.master		= amixer_master,
	.next_conj	= amixer_next_conj,
	.index		= amixer_index,
	.output_slot	= amixer_output_slot,
};

static int amixer_set_input(struct amixer *amixer, struct rsc *rsc)
{
	struct hw *hw;

	hw = amixer->rsc.hw;
	hw->amixer_set_mode(amixer->rsc.ctrl_blk, AMIXER_Y_IMMEDIATE);
	amixer->input = rsc;
	if (!rsc)
		hw->amixer_set_x(amixer->rsc.ctrl_blk, BLANK_SLOT);
	else
		hw->amixer_set_x(amixer->rsc.ctrl_blk,
					rsc->ops->output_slot(rsc));

	return 0;
}

/* y is a 14-bit immediate constant */
static int amixer_set_y(struct amixer *amixer, unsigned int y)
{
	struct hw *hw;

	hw = amixer->rsc.hw;
	hw->amixer_set_y(amixer->rsc.ctrl_blk, y);

	return 0;
}

static int amixer_set_invalid_squash(struct amixer *amixer, unsigned int iv)
{
	struct hw *hw;

	hw = amixer->rsc.hw;
	hw->amixer_set_iv(amixer->rsc.ctrl_blk, iv);

	return 0;
}

static int amixer_set_sum(struct amixer *amixer, struct sum *sum)
{
	struct hw *hw;

	hw = amixer->rsc.hw;
	amixer->sum = sum;
	if (!sum) {
		hw->amixer_set_se(amixer->rsc.ctrl_blk, 0);
	} else {
		hw->amixer_set_se(amixer->rsc.ctrl_blk, 1);
		hw->amixer_set_sadr(amixer->rsc.ctrl_blk,
					sum->rsc.ops->index(&sum->rsc));
	}

	return 0;
}

static int amixer_commit_write(struct amixer *amixer)
{
	struct hw *hw;
	unsigned int index;
	int i;
	struct rsc *input;
	struct sum *sum;

	hw = amixer->rsc.hw;
	input = amixer->input;
	sum = amixer->sum;

	/* Program master and conjugate resources */
	amixer->rsc.ops->master(&amixer->rsc);
	if (input)
		input->ops->master(input);

	if (sum)
		sum->rsc.ops->master(&sum->rsc);

	for (i = 0; i < amixer->rsc.msr; i++) {
		hw->amixer_set_dirty_all(amixer->rsc.ctrl_blk);
		if (input) {
			hw->amixer_set_x(amixer->rsc.ctrl_blk,
						input->ops->output_slot(input));
			input->ops->next_conj(input);
		}
		if (sum) {
			hw->amixer_set_sadr(amixer->rsc.ctrl_blk,
						sum->rsc.ops->index(&sum->rsc));
			sum->rsc.ops->next_conj(&sum->rsc);
		}
		index = amixer->rsc.ops->output_slot(&amixer->rsc);
		hw->amixer_commit_write(hw, index, amixer->rsc.ctrl_blk);
		amixer->rsc.ops->next_conj(&amixer->rsc);
	}
	amixer->rsc.ops->master(&amixer->rsc);
	if (input)
		input->ops->master(input);

	if (sum)
		sum->rsc.ops->master(&sum->rsc);

	return 0;
}

static int amixer_commit_raw_write(struct amixer *amixer)
{
	struct hw *hw;
	unsigned int index;

	hw = amixer->rsc.hw;
	index = amixer->rsc.ops->output_slot(&amixer->rsc);
	hw->amixer_commit_write(hw, index, amixer->rsc.ctrl_blk);

	return 0;
}

static int amixer_get_y(struct amixer *amixer)
{
	struct hw *hw;

	hw = amixer->rsc.hw;
	return hw->amixer_get_y(amixer->rsc.ctrl_blk);
}

static int amixer_setup(struct amixer *amixer, struct rsc *input,
			unsigned int scale, struct sum *sum)
{
	amixer_set_input(amixer, input);
	amixer_set_y(amixer, scale);
	amixer_set_sum(amixer, sum);
	amixer_commit_write(amixer);
	return 0;
}

static const struct amixer_rsc_ops amixer_ops = {
	.set_input		= amixer_set_input,
	.set_invalid_squash	= amixer_set_invalid_squash,
	.set_scale		= amixer_set_y,
	.set_sum		= amixer_set_sum,
	.commit_write		= amixer_commit_write,
	.commit_raw_write	= amixer_commit_raw_write,
	.setup			= amixer_setup,
	.get_scale		= amixer_get_y,
};

static int amixer_rsc_init(struct amixer *amixer,
			   const struct amixer_desc *desc,
			   struct amixer_mgr *mgr)
{
	int err;

	err = rsc_init(&amixer->rsc, amixer->idx[0],
			AMIXER, desc->msr, mgr->mgr.hw);
	if (err)
		return err;

	/* Set amixer specific operations */
	amixer->rsc.ops = &amixer_basic_rsc_ops;
	amixer->ops = &amixer_ops;
	amixer->input = NULL;
	amixer->sum = NULL;

	amixer_setup(amixer, NULL, 0, NULL);

	return 0;
}

static int amixer_rsc_uninit(struct amixer *amixer)
{
	amixer_setup(amixer, NULL, 0, NULL);
	rsc_uninit(&amixer->rsc);
	amixer->ops = NULL;
	amixer->input = NULL;
	amixer->sum = NULL;
	return 0;
}

static int get_amixer_rsc(struct amixer_mgr *mgr,
			  const struct amixer_desc *desc,
			  struct amixer **ramixer)
{
	int err, i;
	unsigned int idx;
	struct amixer *amixer;
	unsigned long flags;

	*ramixer = NULL;

	/* Allocate mem for amixer resource */
	amixer = kzalloc(sizeof(*amixer), GFP_KERNEL);
	if (!amixer)
		return -ENOMEM;

	/* Check whether there are sufficient
	 * amixer resources to meet request. */
	err = 0;
	spin_lock_irqsave(&mgr->mgr_lock, flags);
	for (i = 0; i < desc->msr; i++) {
		err = mgr_get_resource(&mgr->mgr, 1, &idx);
		if (err)
			break;

		amixer->idx[i] = idx;
	}
	spin_unlock_irqrestore(&mgr->mgr_lock, flags);
	if (err) {
		dev_err(mgr->card->dev,
			"Can't meet AMIXER resource request!\n");
		goto error;
	}

	err = amixer_rsc_init(amixer, desc, mgr);
	if (err)
		goto error;

	*ramixer = amixer;

	return 0;

error:
	spin_lock_irqsave(&mgr->mgr_lock, flags);
	for (i--; i >= 0; i--)
		mgr_put_resource(&mgr->mgr, 1, amixer->idx[i]);

	spin_unlock_irqrestore(&mgr->mgr_lock, flags);
	kfree(amixer);
	return err;
}

static int put_amixer_rsc(struct amixer_mgr *mgr, struct amixer *amixer)
{
	unsigned long flags;
	int i;

	spin_lock_irqsave(&mgr->mgr_lock, flags);
	for (i = 0; i < amixer->rsc.msr; i++)
		mgr_put_resource(&mgr->mgr, 1, amixer->idx[i]);

	spin_unlock_irqrestore(&mgr->mgr_lock, flags);
	amixer_rsc_uninit(amixer);
	kfree(amixer);

	return 0;
}

int amixer_mgr_create(struct hw *hw, struct amixer_mgr **ramixer_mgr)
{
	int err;
	struct amixer_mgr *amixer_mgr;

	*ramixer_mgr = NULL;
	amixer_mgr = kzalloc(sizeof(*amixer_mgr), GFP_KERNEL);
	if (!amixer_mgr)
		return -ENOMEM;

	err = rsc_mgr_init(&amixer_mgr->mgr, AMIXER, AMIXER_RESOURCE_NUM, hw);
	if (err)
		goto error;

	spin_lock_init(&amixer_mgr->mgr_lock);

	amixer_mgr->get_amixer = get_amixer_rsc;
	amixer_mgr->put_amixer = put_amixer_rsc;
	amixer_mgr->card = hw->card;

	*ramixer_mgr = amixer_mgr;

	return 0;

error:
	kfree(amixer_mgr);
	return err;
}

int amixer_mgr_destroy(struct amixer_mgr *amixer_mgr)
{
	rsc_mgr_uninit(&amixer_mgr->mgr);
	kfree(amixer_mgr);
	return 0;
}

/* SUM resource management */

static int sum_master(struct rsc *rsc)
{
	rsc->conj = 0;
	return rsc->idx = container_of(rsc, struct sum, rsc)->idx[0];
}

static int sum_next_conj(struct rsc *rsc)
{
	rsc->conj++;
	return container_of(rsc, struct sum, rsc)->idx[rsc->conj];
}

static int sum_index(const struct rsc *rsc)
{
	return container_of(rsc, struct sum, rsc)->idx[rsc->conj];
}

static int sum_output_slot(const struct rsc *rsc)
{
	return (sum_index(rsc) << 4) + 0xc;
}

static const struct rsc_ops sum_basic_rsc_ops = {
	.master		= sum_master,
	.next_conj	= sum_next_conj,
	.index		= sum_index,
	.output_slot	= sum_output_slot,
};

static int sum_rsc_init(struct sum *sum,
			const struct sum_desc *desc,
			struct sum_mgr *mgr)
{
	int err;

	err = rsc_init(&sum->rsc, sum->idx[0], SUM, desc->msr, mgr->mgr.hw);
	if (err)
		return err;

	sum->rsc.ops = &sum_basic_rsc_ops;

	return 0;
}

static int sum_rsc_uninit(struct sum *sum)
{
	rsc_uninit(&sum->rsc);
	return 0;
}

static int get_sum_rsc(struct sum_mgr *mgr,
		       const struct sum_desc *desc,
		       struct sum **rsum)
{
	int err, i;
	unsigned int idx;
	struct sum *sum;
	unsigned long flags;

	*rsum = NULL;

	/* Allocate mem for sum resource */
	sum = kzalloc(sizeof(*sum), GFP_KERNEL);
	if (!sum)
		return -ENOMEM;

	/* Check whether there are sufficient sum resources to meet request. */
	err = 0;
	spin_lock_irqsave(&mgr->mgr_lock, flags);
	for (i = 0; i < desc->msr; i++) {
		err = mgr_get_resource(&mgr->mgr, 1, &idx);
		if (err)
			break;

		sum->idx[i] = idx;
	}
	spin_unlock_irqrestore(&mgr->mgr_lock, flags);
	if (err) {
		dev_err(mgr->card->dev,
			"Can't meet SUM resource request!\n");
		goto error;
	}

	err = sum_rsc_init(sum, desc, mgr);
	if (err)
		goto error;

	*rsum = sum;

	return 0;

error:
	spin_lock_irqsave(&mgr->mgr_lock, flags);
	for (i--; i >= 0; i--)
		mgr_put_resource(&mgr->mgr, 1, sum->idx[i]);

	spin_unlock_irqrestore(&mgr->mgr_lock, flags);
	kfree(sum);
	return err;
}

static int put_sum_rsc(struct sum_mgr *mgr, struct sum *sum)
{
	unsigned long flags;
	int i;

	spin_lock_irqsave(&mgr->mgr_lock, flags);
	for (i = 0; i < sum->rsc.msr; i++)
		mgr_put_resource(&mgr->mgr, 1, sum->idx[i]);

	spin_unlock_irqrestore(&mgr->mgr_lock, flags);
	sum_rsc_uninit(sum);
	kfree(sum);

	return 0;
}

int sum_mgr_create(struct hw *hw, struct sum_mgr **rsum_mgr)
{
	int err;
	struct sum_mgr *sum_mgr;

	*rsum_mgr = NULL;
	sum_mgr = kzalloc(sizeof(*sum_mgr), GFP_KERNEL);
	if (!sum_mgr)
		return -ENOMEM;

	err = rsc_mgr_init(&sum_mgr->mgr, SUM, SUM_RESOURCE_NUM, hw);
	if (err)
		goto error;

	spin_lock_init(&sum_mgr->mgr_lock);

	sum_mgr->get_sum = get_sum_rsc;
	sum_mgr->put_sum = put_sum_rsc;
	sum_mgr->card = hw->card;

	*rsum_mgr = sum_mgr;

	return 0;

error:
	kfree(sum_mgr);
	return err;
}

int sum_mgr_destroy(struct sum_mgr *sum_mgr)
{
	rsc_mgr_uninit(&sum_mgr->mgr);
	kfree(sum_mgr);
	return 0;
}