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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 | ||
137 | int rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, void *hw) | |
138 | { | |
139 | int err = 0; | |
140 | ||
141 | rsc->idx = idx; | |
142 | rsc->conj = idx; | |
143 | rsc->type = type; | |
144 | rsc->msr = msr; | |
145 | rsc->hw = hw; | |
146 | rsc->ops = &rsc_generic_ops; | |
35ebf6e7 | 147 | if (!hw) { |
8cc72361 WYC |
148 | rsc->ctrl_blk = NULL; |
149 | return 0; | |
150 | } | |
151 | ||
152 | switch (type) { | |
153 | case SRC: | |
154 | err = ((struct hw *)hw)->src_rsc_get_ctrl_blk(&rsc->ctrl_blk); | |
155 | break; | |
156 | case AMIXER: | |
157 | err = ((struct hw *)hw)-> | |
158 | amixer_rsc_get_ctrl_blk(&rsc->ctrl_blk); | |
159 | break; | |
160 | case SRCIMP: | |
161 | case SUM: | |
162 | case DAIO: | |
163 | break; | |
164 | default: | |
b3e0afe6 TI |
165 | printk(KERN_ERR |
166 | "ctxfi: Invalid resource type value %d!\n", type); | |
8cc72361 WYC |
167 | return -EINVAL; |
168 | } | |
169 | ||
170 | if (err) { | |
b3e0afe6 TI |
171 | printk(KERN_ERR |
172 | "ctxfi: Failed to get resource control block!\n"); | |
8cc72361 WYC |
173 | return err; |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | int rsc_uninit(struct rsc *rsc) | |
180 | { | |
181 | if ((NULL != rsc->hw) && (NULL != rsc->ctrl_blk)) { | |
182 | switch (rsc->type) { | |
183 | case SRC: | |
184 | ((struct hw *)rsc->hw)-> | |
185 | src_rsc_put_ctrl_blk(rsc->ctrl_blk); | |
186 | break; | |
187 | case AMIXER: | |
188 | ((struct hw *)rsc->hw)-> | |
189 | amixer_rsc_put_ctrl_blk(rsc->ctrl_blk); | |
190 | break; | |
191 | case SUM: | |
192 | case DAIO: | |
193 | break; | |
194 | default: | |
b3e0afe6 TI |
195 | printk(KERN_ERR "ctxfi: " |
196 | "Invalid resource type value %d!\n", rsc->type); | |
8cc72361 WYC |
197 | break; |
198 | } | |
199 | ||
200 | rsc->hw = rsc->ctrl_blk = NULL; | |
201 | } | |
202 | ||
203 | rsc->idx = rsc->conj = 0; | |
204 | rsc->type = NUM_RSCTYP; | |
205 | rsc->msr = 0; | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type, | |
211 | unsigned int amount, void *hw_obj) | |
212 | { | |
213 | int err = 0; | |
214 | struct hw *hw = hw_obj; | |
215 | ||
216 | mgr->type = NUM_RSCTYP; | |
217 | ||
218 | mgr->rscs = kzalloc(((amount + 8 - 1) / 8), GFP_KERNEL); | |
35ebf6e7 | 219 | if (!mgr->rscs) |
8cc72361 WYC |
220 | return -ENOMEM; |
221 | ||
222 | switch (type) { | |
223 | case SRC: | |
224 | err = hw->src_mgr_get_ctrl_blk(&mgr->ctrl_blk); | |
225 | break; | |
226 | case SRCIMP: | |
227 | err = hw->srcimp_mgr_get_ctrl_blk(&mgr->ctrl_blk); | |
228 | break; | |
229 | case AMIXER: | |
230 | err = hw->amixer_mgr_get_ctrl_blk(&mgr->ctrl_blk); | |
231 | break; | |
232 | case DAIO: | |
233 | err = hw->daio_mgr_get_ctrl_blk(hw, &mgr->ctrl_blk); | |
234 | break; | |
235 | case SUM: | |
236 | break; | |
237 | default: | |
b3e0afe6 TI |
238 | printk(KERN_ERR |
239 | "ctxfi: Invalid resource type value %d!\n", type); | |
8cc72361 WYC |
240 | err = -EINVAL; |
241 | goto error; | |
242 | } | |
243 | ||
244 | if (err) { | |
b3e0afe6 TI |
245 | printk(KERN_ERR |
246 | "ctxfi: Failed to get manager control block!\n"); | |
8cc72361 WYC |
247 | goto error; |
248 | } | |
249 | ||
250 | mgr->type = type; | |
251 | mgr->avail = mgr->amount = amount; | |
252 | mgr->hw = hw; | |
253 | ||
254 | return 0; | |
255 | ||
256 | error: | |
257 | kfree(mgr->rscs); | |
258 | return err; | |
259 | } | |
260 | ||
261 | int rsc_mgr_uninit(struct rsc_mgr *mgr) | |
262 | { | |
263 | if (NULL != mgr->rscs) { | |
264 | kfree(mgr->rscs); | |
265 | mgr->rscs = NULL; | |
266 | } | |
267 | ||
268 | if ((NULL != mgr->hw) && (NULL != mgr->ctrl_blk)) { | |
269 | switch (mgr->type) { | |
270 | case SRC: | |
271 | ((struct hw *)mgr->hw)-> | |
272 | src_mgr_put_ctrl_blk(mgr->ctrl_blk); | |
273 | break; | |
274 | case SRCIMP: | |
275 | ((struct hw *)mgr->hw)-> | |
276 | srcimp_mgr_put_ctrl_blk(mgr->ctrl_blk); | |
277 | break; | |
278 | case AMIXER: | |
279 | ((struct hw *)mgr->hw)-> | |
280 | amixer_mgr_put_ctrl_blk(mgr->ctrl_blk); | |
281 | break; | |
282 | case DAIO: | |
283 | ((struct hw *)mgr->hw)-> | |
284 | daio_mgr_put_ctrl_blk(mgr->ctrl_blk); | |
285 | break; | |
286 | case SUM: | |
287 | break; | |
288 | default: | |
b3e0afe6 TI |
289 | printk(KERN_ERR "ctxfi: " |
290 | "Invalid resource type value %d!\n", mgr->type); | |
8cc72361 WYC |
291 | break; |
292 | } | |
293 | ||
294 | mgr->hw = mgr->ctrl_blk = NULL; | |
295 | } | |
296 | ||
297 | mgr->type = NUM_RSCTYP; | |
298 | mgr->avail = mgr->amount = 0; | |
299 | ||
300 | return 0; | |
301 | } |