[deliverable/linux.git] / sound / pci / ctxfi / ctresource.c

/**
 * 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	ctresource.c
 *
 * @Brief
 * This file contains the implementation of some generic helper functions.
 *
 * @Author	Liu Chun
 * @Date 	May 15 2008
 *
 */

#include "ctresource.h"
#include "cthardware.h"
#include <linux/err.h>
#include <linux/slab.h>

#define AUDIO_SLOT_BLOCK_NUM 	256

/* Resource allocation based on bit-map management mechanism */
static int
get_resource(u8 *rscs, unsigned int amount,
	     unsigned int multi, unsigned int *ridx)
{
	int i, j, k, n;

	/* Check whether there are sufficient resources to meet request. */
	for (i = 0, n = multi; i < amount; i++) {
		j = i / 8;
		k = i % 8;
		if (rscs[j] & ((u8)1 << k)) {
			n = multi;
			continue;
		}
		if (!(--n))
			break; /* found sufficient contiguous resources */
	}

	if (i >= amount) {
		/* Can not find sufficient contiguous resources */
		return -ENOENT;
	}

	/* Mark the contiguous bits in resource bit-map as used */
	for (n = multi; n > 0; n--) {
		j = i / 8;
		k = i % 8;
		rscs[j] |= ((u8)1 << k);
		i--;
	}

	*ridx = i + 1;

	return 0;
}

static int put_resource(u8 *rscs, unsigned int multi, unsigned int idx)
{
	unsigned int i, j, k, n;

	/* Mark the contiguous bits in resource bit-map as used */
	for (n = multi, i = idx; n > 0; n--) {
		j = i / 8;
		k = i % 8;
		rscs[j] &= ~((u8)1 << k);
		i++;
	}

	return 0;
}

int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx)
{
	int err;

	if (n > mgr->avail)
		return -ENOENT;

	err = get_resource(mgr->rscs, mgr->amount, n, ridx);
	if (!err)
		mgr->avail -= n;

	return err;
}

int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx)
{
	put_resource(mgr->rscs, n, idx);
	mgr->avail += n;

	return 0;
}

static unsigned char offset_in_audio_slot_block[NUM_RSCTYP] = {
	/* SRC channel is at Audio Ring slot 1 every 16 slots. */
	[SRC]		= 0x1,
	[AMIXER]	= 0x4,
	[SUM]		= 0xc,
};

static int rsc_index(const struct rsc *rsc)
{
    return rsc->conj;
}

static int audio_ring_slot(const struct rsc *rsc)
{
    return (rsc->conj << 4) + offset_in_audio_slot_block[rsc->type];
}

static int rsc_next_conj(struct rsc *rsc)
{
	unsigned int i;
	for (i = 0; (i < 8) && (!(rsc->msr & (0x1 << i))); )
		i++;
	rsc->conj += (AUDIO_SLOT_BLOCK_NUM >> i);
	return rsc->conj;
}

static int rsc_master(struct rsc *rsc)
{
	return rsc->conj = rsc->idx;
}

static struct rsc_ops rsc_generic_ops = {
	.index		= rsc_index,
	.output_slot	= audio_ring_slot,
	.master		= rsc_master,
	.next_conj	= rsc_next_conj,
};

int
rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, struct hw *hw)
{
	int err = 0;

	rsc->idx = idx;
	rsc->conj = idx;
	rsc->type = type;
	rsc->msr = msr;
	rsc->hw = hw;
	rsc->ops = &rsc_generic_ops;
	if (!hw) {
		rsc->ctrl_blk = NULL;
		return 0;
	}

	switch (type) {
	case SRC:
		err = ((struct hw *)hw)->src_rsc_get_ctrl_blk(&rsc->ctrl_blk);
		break;
	case AMIXER:
		err = ((struct hw *)hw)->
				amixer_rsc_get_ctrl_blk(&rsc->ctrl_blk);
		break;
	case SRCIMP:
	case SUM:
	case DAIO:
		break;
	default:
		pr_err("ctxfi: Invalid resource type value %d!\n", type);
		return -EINVAL;
	}

	if (err) {
		pr_err("ctxfi: Failed to get resource control block!\n");
		return err;
	}

	return 0;
}

int rsc_uninit(struct rsc *rsc)
{
	if ((NULL != rsc->hw) && (NULL != rsc->ctrl_blk)) {
		switch (rsc->type) {
		case SRC:
			((struct hw *)rsc->hw)->
				src_rsc_put_ctrl_blk(rsc->ctrl_blk);
			break;
		case AMIXER:
			((struct hw *)rsc->hw)->
				amixer_rsc_put_ctrl_blk(rsc->ctrl_blk);
			break;
		case SUM:
		case DAIO:
			break;
		default:
			pr_err("ctxfi: Invalid resource type value %d!\n",
				rsc->type);
			break;
		}

		rsc->hw = rsc->ctrl_blk = NULL;
	}

	rsc->idx = rsc->conj = 0;
	rsc->type = NUM_RSCTYP;
	rsc->msr = 0;

	return 0;
}

int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type,
		 unsigned int amount, struct hw *hw_obj)
{
	int err = 0;
	struct hw *hw = hw_obj;

	mgr->type = NUM_RSCTYP;

	mgr->rscs = kzalloc(((amount + 8 - 1) / 8), GFP_KERNEL);
	if (!mgr->rscs)
		return -ENOMEM;

	switch (type) {
	case SRC:
		err = hw->src_mgr_get_ctrl_blk(&mgr->ctrl_blk);
		break;
	case SRCIMP:
		err = hw->srcimp_mgr_get_ctrl_blk(&mgr->ctrl_blk);
		break;
	case AMIXER:
		err = hw->amixer_mgr_get_ctrl_blk(&mgr->ctrl_blk);
		break;
	case DAIO:
		err = hw->daio_mgr_get_ctrl_blk(hw, &mgr->ctrl_blk);
		break;
	case SUM:
		break;
	default:
		pr_err("ctxfi: Invalid resource type value %d!\n", type);
		err = -EINVAL;
		goto error;
	}

	if (err) {
		pr_err("ctxfi: Failed to get manager control block!\n");
		goto error;
	}

	mgr->type = type;
	mgr->avail = mgr->amount = amount;
	mgr->hw = hw;

	return 0;

error:
	kfree(mgr->rscs);
	return err;
}

int rsc_mgr_uninit(struct rsc_mgr *mgr)
{
	if (NULL != mgr->rscs) {
		kfree(mgr->rscs);
		mgr->rscs = NULL;
	}

	if ((NULL != mgr->hw) && (NULL != mgr->ctrl_blk)) {
		switch (mgr->type) {
		case SRC:
			((struct hw *)mgr->hw)->
				src_mgr_put_ctrl_blk(mgr->ctrl_blk);
			break;
		case SRCIMP:
			((struct hw *)mgr->hw)->
				srcimp_mgr_put_ctrl_blk(mgr->ctrl_blk);
			break;
		case AMIXER:
			((struct hw *)mgr->hw)->
				amixer_mgr_put_ctrl_blk(mgr->ctrl_blk);
			break;
		case DAIO:
			((struct hw *)mgr->hw)->
				daio_mgr_put_ctrl_blk(mgr->ctrl_blk);
			break;
		case SUM:
			break;
		default:
			pr_err("ctxfi: Invalid resource type value %d!\n",
				mgr->type);
			break;
		}

		mgr->hw = mgr->ctrl_blk = NULL;
	}

	mgr->type = NUM_RSCTYP;
	mgr->avail = mgr->amount = 0;

	return 0;
}
Commit	Line	Data
8cc72361 WYC	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 ctresource.c
	9	*
	10	* @Brief
	11	* This file contains the implementation of some generic helper functions.
	12	*
	13	* @Author Liu Chun
	14	* @Date May 15 2008
	15	*
	16	*/
	17
	18	#include "ctresource.h"
	19	#include "cthardware.h"
	20	#include <linux/err.h>
	21	#include <linux/slab.h>
	22
	23	#define AUDIO_SLOT_BLOCK_NUM 256
	24
	25	/* Resource allocation based on bit-map management mechanism */
	26	static int
	27	get_resource(u8 *rscs, unsigned int amount,
	28	unsigned int multi, unsigned int *ridx)
	29	{
514eef9c	30	int i, j, k, n;
8cc72361 WYC	31
	32	/* Check whether there are sufficient resources to meet request. */
	33	for (i = 0, n = multi; i < amount; i++) {
	34	j = i / 8;
	35	k = i % 8;
	36	if (rscs[j] & ((u8)1 << k)) {
	37	n = multi;
	38	continue;
	39	}
	40	if (!(--n))
	41	break; /* found sufficient contiguous resources */
	42	}
	43
	44	if (i >= amount) {
	45	/* Can not find sufficient contiguous resources */
	46	return -ENOENT;
	47	}
	48
	49	/* Mark the contiguous bits in resource bit-map as used */
	50	for (n = multi; n > 0; n--) {
	51	j = i / 8;
	52	k = i % 8;
	53	rscs[j] \|= ((u8)1 << k);
	54	i--;
	55	}
	56
	57	*ridx = i + 1;
	58
	59	return 0;
	60	}
	61
	62	static int put_resource(u8 *rscs, unsigned int multi, unsigned int idx)
	63	{
514eef9c	64	unsigned int i, j, k, n;
8cc72361 WYC	65
	66	/* Mark the contiguous bits in resource bit-map as used */
	67	for (n = multi, i = idx; n > 0; n--) {
	68	j = i / 8;
	69	k = i % 8;
	70	rscs[j] &= ~((u8)1 << k);
	71	i++;
	72	}
	73
	74	return 0;
	75	}
	76
	77	int mgr_get_resource(struct rsc_mgr mgr, unsigned int n, unsigned int ridx)
	78	{
514eef9c	79	int err;
8cc72361 WYC	80
	81	if (n > mgr->avail)
	82	return -ENOENT;
	83
	84	err = get_resource(mgr->rscs, mgr->amount, n, ridx);
	85	if (!err)
	86	mgr->avail -= n;
	87
	88	return err;
	89	}
	90
	91	int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx)
	92	{
	93	put_resource(mgr->rscs, n, idx);
	94	mgr->avail += n;
	95
	96	return 0;
	97	}
	98
	99	static unsigned char offset_in_audio_slot_block[NUM_RSCTYP] = {
	100	/* SRC channel is at Audio Ring slot 1 every 16 slots. */
	101	[SRC] = 0x1,
	102	[AMIXER] = 0x4,
	103	[SUM] = 0xc,
	104	};
	105
	106	static int rsc_index(const struct rsc *rsc)
	107	{
	108	return rsc->conj;
	109	}
	110
	111	static int audio_ring_slot(const struct rsc *rsc)
	112	{
	113	return (rsc->conj << 4) + offset_in_audio_slot_block[rsc->type];
	114	}
	115
	116	static int rsc_next_conj(struct rsc *rsc)
	117	{
	118	unsigned int i;
	119	for (i = 0; (i < 8) && (!(rsc->msr & (0x1 << i))); )
	120	i++;
	121	rsc->conj += (AUDIO_SLOT_BLOCK_NUM >> i);
	122	return rsc->conj;
	123	}
	124
	125	static int rsc_master(struct rsc *rsc)
	126	{
	127	return rsc->conj = rsc->idx;
	128	}
	129
	130	static struct rsc_ops rsc_generic_ops = {
	131	.index = rsc_index,
	132	.output_slot = audio_ring_slot,
	133	.master = rsc_master,
	134	.next_conj = rsc_next_conj,
	135	};
	136
66640898 SM	137	int
66640898 SM	138	rsc_init(struct rsc rsc, u32 idx, enum RSCTYP type, u32 msr, struct hw hw)
8cc72361 WYC	139	{
	140	int err = 0;
	141
	142	rsc->idx = idx;
	143	rsc->conj = idx;
	144	rsc->type = type;
	145	rsc->msr = msr;
	146	rsc->hw = hw;
	147	rsc->ops = &rsc_generic_ops;
35ebf6e7	148	if (!hw) {
8cc72361 WYC	149	rsc->ctrl_blk = NULL;
	150	return 0;
	151	}
	152
	153	switch (type) {
	154	case SRC:
	155	err = ((struct hw *)hw)->src_rsc_get_ctrl_blk(&rsc->ctrl_blk);
	156	break;
	157	case AMIXER:
	158	err = ((struct hw *)hw)->
	159	amixer_rsc_get_ctrl_blk(&rsc->ctrl_blk);
	160	break;
	161	case SRCIMP:
	162	case SUM:
	163	case DAIO:
	164	break;
	165	default:
62afa853	166	pr_err("ctxfi: Invalid resource type value %d!\n", type);
8cc72361 WYC	167	return -EINVAL;
	168	}
	169
	170	if (err) {
62afa853	171	pr_err("ctxfi: Failed to get resource control block!\n");
8cc72361 WYC	172	return err;
	173	}
	174
	175	return 0;
	176	}
	177
	178	int rsc_uninit(struct rsc *rsc)
	179	{
	180	if ((NULL != rsc->hw) && (NULL != rsc->ctrl_blk)) {
	181	switch (rsc->type) {
	182	case SRC:
	183	((struct hw *)rsc->hw)->
	184	src_rsc_put_ctrl_blk(rsc->ctrl_blk);
	185	break;
	186	case AMIXER:
	187	((struct hw *)rsc->hw)->
	188	amixer_rsc_put_ctrl_blk(rsc->ctrl_blk);
	189	break;
	190	case SUM:
	191	case DAIO:
	192	break;
	193	default:
62afa853 SM	194	pr_err("ctxfi: Invalid resource type value %d!\n",
62afa853 SM	195	rsc->type);
8cc72361 WYC	196	break;
	197	}
	198
	199	rsc->hw = rsc->ctrl_blk = NULL;
	200	}
	201
	202	rsc->idx = rsc->conj = 0;
	203	rsc->type = NUM_RSCTYP;
	204	rsc->msr = 0;
	205
	206	return 0;
	207	}
	208
	209	int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type,
66640898	210	unsigned int amount, struct hw *hw_obj)
8cc72361 WYC	211	{
	212	int err = 0;
	213	struct hw *hw = hw_obj;
	214
	215	mgr->type = NUM_RSCTYP;
	216
	217	mgr->rscs = kzalloc(((amount + 8 - 1) / 8), GFP_KERNEL);
35ebf6e7	218	if (!mgr->rscs)
8cc72361 WYC	219	return -ENOMEM;
	220
	221	switch (type) {
	222	case SRC:
	223	err = hw->src_mgr_get_ctrl_blk(&mgr->ctrl_blk);
	224	break;
	225	case SRCIMP:
	226	err = hw->srcimp_mgr_get_ctrl_blk(&mgr->ctrl_blk);
	227	break;
	228	case AMIXER:
	229	err = hw->amixer_mgr_get_ctrl_blk(&mgr->ctrl_blk);
	230	break;
	231	case DAIO:
	232	err = hw->daio_mgr_get_ctrl_blk(hw, &mgr->ctrl_blk);
	233	break;
	234	case SUM:
	235	break;
	236	default:
62afa853	237	pr_err("ctxfi: Invalid resource type value %d!\n", type);
8cc72361 WYC	238	err = -EINVAL;
	239	goto error;
	240	}
	241
	242	if (err) {
62afa853	243	pr_err("ctxfi: Failed to get manager control block!\n");
8cc72361 WYC	244	goto error;
	245	}
	246
	247	mgr->type = type;
	248	mgr->avail = mgr->amount = amount;
	249	mgr->hw = hw;
	250
	251	return 0;
	252
	253	error:
	254	kfree(mgr->rscs);
	255	return err;
	256	}
	257
	258	int rsc_mgr_uninit(struct rsc_mgr *mgr)
	259	{
	260	if (NULL != mgr->rscs) {
	261	kfree(mgr->rscs);
	262	mgr->rscs = NULL;
	263	}
	264
	265	if ((NULL != mgr->hw) && (NULL != mgr->ctrl_blk)) {
	266	switch (mgr->type) {
	267	case SRC:
	268	((struct hw *)mgr->hw)->
	269	src_mgr_put_ctrl_blk(mgr->ctrl_blk);
	270	break;
	271	case SRCIMP:
	272	((struct hw *)mgr->hw)->
	273	srcimp_mgr_put_ctrl_blk(mgr->ctrl_blk);
	274	break;
	275	case AMIXER:
	276	((struct hw *)mgr->hw)->
	277	amixer_mgr_put_ctrl_blk(mgr->ctrl_blk);
	278	break;
	279	case DAIO:
	280	((struct hw *)mgr->hw)->
	281	daio_mgr_put_ctrl_blk(mgr->ctrl_blk);
	282	break;
	283	case SUM:
	284	break;
	285	default:
62afa853 SM	286	pr_err("ctxfi: Invalid resource type value %d!\n",
62afa853 SM	287	mgr->type);
8cc72361 WYC	288	break;
	289	}
	290
	291	mgr->hw = mgr->ctrl_blk = NULL;
	292	}
	293
	294	mgr->type = NUM_RSCTYP;
	295	mgr->avail = mgr->amount = 0;
	296
	297	return 0;
	298	}