1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. |
4 | * |
5 | * @File ctresource.c |
6 | * |
7 | * @Brief |
8 | * This file contains the implementation of some generic helper functions. |
9 | * |
10 | * @Author Liu Chun |
11 | * @Date May 15 2008 |
12 | */ |
13 | |
14 | #include "ctresource.h" |
15 | #include "cthardware.h" |
16 | #include <linux/err.h> |
17 | #include <linux/slab.h> |
18 | |
19 | #define AUDIO_SLOT_BLOCK_NUM 256 |
20 | |
21 | /* Resource allocation based on bit-map management mechanism */ |
22 | static int |
23 | get_resource(u8 *rscs, unsigned int amount, |
24 | unsigned int multi, unsigned int *ridx) |
25 | { |
26 | int i, j, k, n; |
27 | |
28 | /* Check whether there are sufficient resources to meet request. */ |
29 | for (i = 0, n = multi; i < amount; i++) { |
30 | j = i / 8; |
31 | k = i % 8; |
32 | if (rscs[j] & ((u8)1 << k)) { |
33 | n = multi; |
34 | continue; |
35 | } |
36 | if (!(--n)) |
37 | break; /* found sufficient contiguous resources */ |
38 | } |
39 | |
40 | if (i >= amount) { |
41 | /* Can not find sufficient contiguous resources */ |
42 | return -ENOENT; |
43 | } |
44 | |
45 | /* Mark the contiguous bits in resource bit-map as used */ |
46 | for (n = multi; n > 0; n--) { |
47 | j = i / 8; |
48 | k = i % 8; |
49 | rscs[j] |= ((u8)1 << k); |
50 | i--; |
51 | } |
52 | |
53 | *ridx = i + 1; |
54 | |
55 | return 0; |
56 | } |
57 | |
58 | static int put_resource(u8 *rscs, unsigned int multi, unsigned int idx) |
59 | { |
60 | unsigned int i, j, k, n; |
61 | |
62 | /* Mark the contiguous bits in resource bit-map as used */ |
63 | for (n = multi, i = idx; n > 0; n--) { |
64 | j = i / 8; |
65 | k = i % 8; |
66 | rscs[j] &= ~((u8)1 << k); |
67 | i++; |
68 | } |
69 | |
70 | return 0; |
71 | } |
72 | |
73 | int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx) |
74 | { |
75 | int err; |
76 | |
77 | if (n > mgr->avail) |
78 | return -ENOENT; |
79 | |
80 | err = get_resource(rscs: mgr->rscs, amount: mgr->amount, multi: n, ridx); |
81 | if (!err) |
82 | mgr->avail -= n; |
83 | |
84 | return err; |
85 | } |
86 | |
87 | int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx) |
88 | { |
89 | put_resource(rscs: mgr->rscs, multi: n, idx); |
90 | mgr->avail += n; |
91 | |
92 | return 0; |
93 | } |
94 | |
95 | static const unsigned char offset_in_audio_slot_block[NUM_RSCTYP] = { |
96 | /* SRC channel is at Audio Ring slot 1 every 16 slots. */ |
97 | [SRC] = 0x1, |
98 | [AMIXER] = 0x4, |
99 | [SUM] = 0xc, |
100 | }; |
101 | |
102 | static int rsc_index(const struct rsc *rsc) |
103 | { |
104 | return rsc->conj; |
105 | } |
106 | |
107 | static int audio_ring_slot(const struct rsc *rsc) |
108 | { |
109 | return (rsc->conj << 4) + offset_in_audio_slot_block[rsc->type]; |
110 | } |
111 | |
112 | static void rsc_next_conj(struct rsc *rsc) |
113 | { |
114 | unsigned int i; |
115 | for (i = 0; (i < 8) && (!(rsc->msr & (0x1 << i))); ) |
116 | i++; |
117 | rsc->conj += (AUDIO_SLOT_BLOCK_NUM >> i); |
118 | } |
119 | |
120 | static void rsc_master(struct rsc *rsc) |
121 | { |
122 | rsc->conj = rsc->idx; |
123 | } |
124 | |
125 | static const struct rsc_ops rsc_generic_ops = { |
126 | .index = rsc_index, |
127 | .output_slot = audio_ring_slot, |
128 | .master = rsc_master, |
129 | .next_conj = rsc_next_conj, |
130 | }; |
131 | |
132 | int |
133 | rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, struct hw *hw) |
134 | { |
135 | int err = 0; |
136 | |
137 | rsc->idx = idx; |
138 | rsc->conj = idx; |
139 | rsc->type = type; |
140 | rsc->msr = msr; |
141 | rsc->hw = hw; |
142 | rsc->ops = &rsc_generic_ops; |
143 | if (!hw) { |
144 | rsc->ctrl_blk = NULL; |
145 | return 0; |
146 | } |
147 | |
148 | switch (type) { |
149 | case SRC: |
150 | err = hw->src_rsc_get_ctrl_blk(&rsc->ctrl_blk); |
151 | break; |
152 | case AMIXER: |
153 | err = hw->amixer_rsc_get_ctrl_blk(&rsc->ctrl_blk); |
154 | break; |
155 | case SRCIMP: |
156 | case SUM: |
157 | case DAIO: |
158 | break; |
159 | default: |
160 | dev_err(((struct hw *)hw)->card->dev, |
161 | "Invalid resource type value %d!\n" , type); |
162 | return -EINVAL; |
163 | } |
164 | |
165 | if (err) { |
166 | dev_err(((struct hw *)hw)->card->dev, |
167 | "Failed to get resource control block!\n" ); |
168 | return err; |
169 | } |
170 | |
171 | return 0; |
172 | } |
173 | |
174 | int rsc_uninit(struct rsc *rsc) |
175 | { |
176 | if ((NULL != rsc->hw) && (NULL != rsc->ctrl_blk)) { |
177 | switch (rsc->type) { |
178 | case SRC: |
179 | rsc->hw->src_rsc_put_ctrl_blk(rsc->ctrl_blk); |
180 | break; |
181 | case AMIXER: |
182 | rsc->hw->amixer_rsc_put_ctrl_blk(rsc->ctrl_blk); |
183 | break; |
184 | case SUM: |
185 | case DAIO: |
186 | break; |
187 | default: |
188 | dev_err(((struct hw *)rsc->hw)->card->dev, |
189 | "Invalid resource type value %d!\n" , |
190 | rsc->type); |
191 | break; |
192 | } |
193 | |
194 | rsc->hw = rsc->ctrl_blk = NULL; |
195 | } |
196 | |
197 | rsc->idx = rsc->conj = 0; |
198 | rsc->type = NUM_RSCTYP; |
199 | rsc->msr = 0; |
200 | |
201 | return 0; |
202 | } |
203 | |
204 | int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type, |
205 | unsigned int amount, struct hw *hw) |
206 | { |
207 | int err = 0; |
208 | |
209 | mgr->type = NUM_RSCTYP; |
210 | |
211 | mgr->rscs = kzalloc(DIV_ROUND_UP(amount, 8), GFP_KERNEL); |
212 | if (!mgr->rscs) |
213 | return -ENOMEM; |
214 | |
215 | switch (type) { |
216 | case SRC: |
217 | err = hw->src_mgr_get_ctrl_blk(&mgr->ctrl_blk); |
218 | break; |
219 | case SRCIMP: |
220 | err = hw->srcimp_mgr_get_ctrl_blk(&mgr->ctrl_blk); |
221 | break; |
222 | case AMIXER: |
223 | err = hw->amixer_mgr_get_ctrl_blk(&mgr->ctrl_blk); |
224 | break; |
225 | case DAIO: |
226 | err = hw->daio_mgr_get_ctrl_blk(hw, &mgr->ctrl_blk); |
227 | break; |
228 | case SUM: |
229 | break; |
230 | default: |
231 | dev_err(hw->card->dev, |
232 | "Invalid resource type value %d!\n" , type); |
233 | err = -EINVAL; |
234 | goto error; |
235 | } |
236 | |
237 | if (err) { |
238 | dev_err(hw->card->dev, |
239 | "Failed to get manager control block!\n" ); |
240 | goto error; |
241 | } |
242 | |
243 | mgr->type = type; |
244 | mgr->avail = mgr->amount = amount; |
245 | mgr->hw = hw; |
246 | |
247 | return 0; |
248 | |
249 | error: |
250 | kfree(objp: mgr->rscs); |
251 | return err; |
252 | } |
253 | |
254 | int rsc_mgr_uninit(struct rsc_mgr *mgr) |
255 | { |
256 | kfree(objp: mgr->rscs); |
257 | mgr->rscs = NULL; |
258 | |
259 | if ((NULL != mgr->hw) && (NULL != mgr->ctrl_blk)) { |
260 | switch (mgr->type) { |
261 | case SRC: |
262 | mgr->hw->src_mgr_put_ctrl_blk(mgr->ctrl_blk); |
263 | break; |
264 | case SRCIMP: |
265 | mgr->hw->srcimp_mgr_put_ctrl_blk(mgr->ctrl_blk); |
266 | break; |
267 | case AMIXER: |
268 | mgr->hw->amixer_mgr_put_ctrl_blk(mgr->ctrl_blk); |
269 | break; |
270 | case DAIO: |
271 | mgr->hw->daio_mgr_put_ctrl_blk(mgr->ctrl_blk); |
272 | break; |
273 | case SUM: |
274 | break; |
275 | default: |
276 | dev_err(((struct hw *)mgr->hw)->card->dev, |
277 | "Invalid resource type value %d!\n" , |
278 | mgr->type); |
279 | break; |
280 | } |
281 | |
282 | mgr->hw = mgr->ctrl_blk = NULL; |
283 | } |
284 | |
285 | mgr->type = NUM_RSCTYP; |
286 | mgr->avail = mgr->amount = 0; |
287 | |
288 | return 0; |
289 | } |
290 | |