1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
8 * This file contains the implementation of some generic helper functions.
14 #include "ctresource.h"
15 #include "cthardware.h"
16 #include <linux/err.h>
17 #include <linux/slab.h>
19 #define AUDIO_SLOT_BLOCK_NUM 256
21 /* Resource allocation based on bit-map management mechanism */
23 get_resource(u8 *rscs, unsigned int amount,
24 unsigned int multi, unsigned int *ridx)
28 /* Check whether there are sufficient resources to meet request. */
29 for (i = 0, n = multi; i < amount; i++) {
32 if (rscs[j] & ((u8)1 << k)) {
37 break; /* found sufficient contiguous resources */
41 /* Can not find sufficient contiguous resources */
45 /* Mark the contiguous bits in resource bit-map as used */
46 for (n = multi; n > 0; n--) {
49 rscs[j] |= ((u8)1 << k);
58 static int put_resource(u8 *rscs, unsigned int multi, unsigned int idx)
60 unsigned int i, j, k, n;
62 /* Mark the contiguous bits in resource bit-map as used */
63 for (n = multi, i = idx; n > 0; n--) {
66 rscs[j] &= ~((u8)1 << k);
73 int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx)
80 err = get_resource(mgr->rscs, mgr->amount, n, ridx);
87 int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx)
89 put_resource(mgr->rscs, n, idx);
95 static const unsigned char offset_in_audio_slot_block[NUM_RSCTYP] = {
96 /* SRC channel is at Audio Ring slot 1 every 16 slots. */
102 static int rsc_index(const struct rsc *rsc)
107 static int audio_ring_slot(const struct rsc *rsc)
109 return (rsc->conj << 4) + offset_in_audio_slot_block[rsc->type];
112 static void rsc_next_conj(struct rsc *rsc)
115 for (i = 0; (i < 8) && (!(rsc->msr & (0x1 << i))); )
117 rsc->conj += (AUDIO_SLOT_BLOCK_NUM >> i);
120 static void rsc_master(struct rsc *rsc)
122 rsc->conj = rsc->idx;
125 static const struct rsc_ops rsc_generic_ops = {
127 .output_slot = audio_ring_slot,
128 .master = rsc_master,
129 .next_conj = rsc_next_conj,
133 rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, struct hw *hw)
142 rsc->ops = &rsc_generic_ops;
144 rsc->ctrl_blk = NULL;
150 err = hw->src_rsc_get_ctrl_blk(&rsc->ctrl_blk);
153 err = hw->amixer_rsc_get_ctrl_blk(&rsc->ctrl_blk);
160 dev_err(((struct hw *)hw)->card->dev,
161 "Invalid resource type value %d!\n", type);
166 dev_err(((struct hw *)hw)->card->dev,
167 "Failed to get resource control block!\n");
174 int rsc_uninit(struct rsc *rsc)
176 if ((NULL != rsc->hw) && (NULL != rsc->ctrl_blk)) {
179 rsc->hw->src_rsc_put_ctrl_blk(rsc->ctrl_blk);
182 rsc->hw->amixer_rsc_put_ctrl_blk(rsc->ctrl_blk);
188 dev_err(((struct hw *)rsc->hw)->card->dev,
189 "Invalid resource type value %d!\n",
194 rsc->hw = rsc->ctrl_blk = NULL;
197 rsc->idx = rsc->conj = 0;
198 rsc->type = NUM_RSCTYP;
204 int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type,
205 unsigned int amount, struct hw *hw)
209 mgr->type = NUM_RSCTYP;
211 mgr->rscs = kzalloc(DIV_ROUND_UP(amount, 8), GFP_KERNEL);
217 err = hw->src_mgr_get_ctrl_blk(&mgr->ctrl_blk);
220 err = hw->srcimp_mgr_get_ctrl_blk(&mgr->ctrl_blk);
223 err = hw->amixer_mgr_get_ctrl_blk(&mgr->ctrl_blk);
226 err = hw->daio_mgr_get_ctrl_blk(hw, &mgr->ctrl_blk);
231 dev_err(hw->card->dev,
232 "Invalid resource type value %d!\n", type);
238 dev_err(hw->card->dev,
239 "Failed to get manager control block!\n");
244 mgr->avail = mgr->amount = amount;
254 int rsc_mgr_uninit(struct rsc_mgr *mgr)
259 if ((NULL != mgr->hw) && (NULL != mgr->ctrl_blk)) {
262 mgr->hw->src_mgr_put_ctrl_blk(mgr->ctrl_blk);
265 mgr->hw->srcimp_mgr_put_ctrl_blk(mgr->ctrl_blk);
268 mgr->hw->amixer_mgr_put_ctrl_blk(mgr->ctrl_blk);
271 mgr->hw->daio_mgr_put_ctrl_blk(mgr->ctrl_blk);
276 dev_err(((struct hw *)mgr->hw)->card->dev,
277 "Invalid resource type value %d!\n",
282 mgr->hw = mgr->ctrl_blk = NULL;
285 mgr->type = NUM_RSCTYP;
286 mgr->avail = mgr->amount = 0;