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
|
/* arch/arm/mach-msm/qdsp5/audmgr.c
*
* interface to "audmgr" service on the baseband cpu
*
* Copyright (C) 2008 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/kthread.h>
#include <linux/wait.h>
#include <asm/atomic.h>
#include <mach/msm_rpcrouter.h>
#include "audmgr.h"
#define STATE_CLOSED 0
#define STATE_DISABLED 1
#define STATE_ENABLING 2
#define STATE_ENABLED 3
#define STATE_DISABLING 4
#define STATE_ERROR 5
static void rpc_ack(struct msm_rpc_endpoint *ept, uint32_t xid)
{
uint32_t rep[6];
rep[0] = cpu_to_be32(xid);
rep[1] = cpu_to_be32(1);
rep[2] = cpu_to_be32(RPCMSG_REPLYSTAT_ACCEPTED);
rep[3] = cpu_to_be32(RPC_ACCEPTSTAT_SUCCESS);
rep[4] = 0;
rep[5] = 0;
msm_rpc_write(ept, rep, sizeof(rep));
}
static void process_audmgr_callback(struct audmgr *am,
struct rpc_audmgr_cb_func_ptr *args,
int len)
{
if (len < (sizeof(uint32_t) * 3))
return;
if (be32_to_cpu(args->set_to_one) != 1)
return;
switch (be32_to_cpu(args->status)) {
case RPC_AUDMGR_STATUS_READY:
if (len < sizeof(uint32_t) * 4)
break;
am->handle = be32_to_cpu(args->u.handle);
pr_info("audmgr: rpc READY handle=0x%08x\n", am->handle);
break;
case RPC_AUDMGR_STATUS_CODEC_CONFIG: {
uint32_t volume;
if (len < sizeof(uint32_t) * 4)
break;
volume = be32_to_cpu(args->u.volume);
pr_info("audmgr: rpc CODEC_CONFIG volume=0x%08x\n", volume);
am->state = STATE_ENABLED;
wake_up(&am->wait);
break;
}
case RPC_AUDMGR_STATUS_PENDING:
pr_err("audmgr: PENDING?\n");
break;
case RPC_AUDMGR_STATUS_SUSPEND:
pr_err("audmgr: SUSPEND?\n");
break;
case RPC_AUDMGR_STATUS_FAILURE:
pr_err("audmgr: FAILURE\n");
break;
case RPC_AUDMGR_STATUS_VOLUME_CHANGE:
pr_err("audmgr: VOLUME_CHANGE?\n");
break;
case RPC_AUDMGR_STATUS_DISABLED:
pr_err("audmgr: DISABLED\n");
am->state = STATE_DISABLED;
wake_up(&am->wait);
break;
case RPC_AUDMGR_STATUS_ERROR:
pr_err("audmgr: ERROR?\n");
am->state = STATE_ERROR;
wake_up(&am->wait);
break;
default:
break;
}
}
static void process_rpc_request(uint32_t proc, uint32_t xid,
void *data, int len, void *private)
{
struct audmgr *am = private;
uint32_t *x = data;
if (0) {
int n = len / 4;
pr_info("rpc_call proc %d:", proc);
while (n--)
printk(" %08x", be32_to_cpu(*x++));
printk("\n");
}
if (proc == AUDMGR_CB_FUNC_PTR)
process_audmgr_callback(am, data, len);
else
pr_err("audmgr: unknown rpc proc %d\n", proc);
rpc_ack(am->ept, xid);
}
#define RPC_TYPE_REQUEST 0
#define RPC_TYPE_REPLY 1
#define RPC_VERSION 2
#define RPC_COMMON_HDR_SZ (sizeof(uint32_t) * 2)
#define RPC_REQUEST_HDR_SZ (sizeof(struct rpc_request_hdr))
#define RPC_REPLY_HDR_SZ (sizeof(uint32_t) * 3)
#define RPC_REPLY_SZ (sizeof(uint32_t) * 6)
static int audmgr_rpc_thread(void *data)
{
struct audmgr *am = data;
struct rpc_request_hdr *hdr = NULL;
uint32_t type;
int len;
pr_info("audmgr_rpc_thread() start\n");
while (!kthread_should_stop()) {
if (hdr) {
kfree(hdr);
hdr = NULL;
}
len = msm_rpc_read(am->ept, (void **) &hdr, -1, -1);
if (len < 0) {
pr_err("audmgr: rpc read failed (%d)\n", len);
break;
}
if (len < RPC_COMMON_HDR_SZ)
continue;
type = be32_to_cpu(hdr->type);
if (type == RPC_TYPE_REPLY) {
struct rpc_reply_hdr *rep = (void *) hdr;
uint32_t status;
if (len < RPC_REPLY_HDR_SZ)
continue;
status = be32_to_cpu(rep->reply_stat);
if (status == RPCMSG_REPLYSTAT_ACCEPTED) {
status = be32_to_cpu(rep->data.acc_hdr.accept_stat);
pr_info("audmgr: rpc_reply status %d\n", status);
} else {
pr_info("audmgr: rpc_reply denied!\n");
}
/* process reply */
continue;
}
if (len < RPC_REQUEST_HDR_SZ)
continue;
process_rpc_request(be32_to_cpu(hdr->procedure),
be32_to_cpu(hdr->xid),
(void *) (hdr + 1),
len - sizeof(*hdr),
data);
}
pr_info("audmgr_rpc_thread() exit\n");
if (hdr) {
kfree(hdr);
hdr = NULL;
}
am->task = NULL;
wake_up(&am->wait);
return 0;
}
struct audmgr_enable_msg {
struct rpc_request_hdr hdr;
struct rpc_audmgr_enable_client_args args;
};
struct audmgr_disable_msg {
struct rpc_request_hdr hdr;
uint32_t handle;
};
int audmgr_open(struct audmgr *am)
{
int rc;
if (am->state != STATE_CLOSED)
return 0;
am->ept = msm_rpc_connect(AUDMGR_PROG,
AUDMGR_VERS,
MSM_RPC_UNINTERRUPTIBLE);
init_waitqueue_head(&am->wait);
if (IS_ERR(am->ept)) {
rc = PTR_ERR(am->ept);
am->ept = NULL;
pr_err("audmgr: failed to connect to audmgr svc\n");
return rc;
}
am->task = kthread_run(audmgr_rpc_thread, am, "audmgr_rpc");
if (IS_ERR(am->task)) {
rc = PTR_ERR(am->task);
am->task = NULL;
msm_rpc_close(am->ept);
am->ept = NULL;
return rc;
}
am->state = STATE_DISABLED;
return 0;
}
EXPORT_SYMBOL(audmgr_open);
int audmgr_close(struct audmgr *am)
{
return -EBUSY;
}
EXPORT_SYMBOL(audmgr_close);
int audmgr_enable(struct audmgr *am, struct audmgr_config *cfg)
{
struct audmgr_enable_msg msg;
int rc;
if (am->state == STATE_ENABLED)
return 0;
if (am->state == STATE_DISABLING)
pr_err("audmgr: state is DISABLING in enable?\n");
am->state = STATE_ENABLING;
msg.args.set_to_one = cpu_to_be32(1);
msg.args.tx_sample_rate = cpu_to_be32(cfg->tx_rate);
msg.args.rx_sample_rate = cpu_to_be32(cfg->rx_rate);
msg.args.def_method = cpu_to_be32(cfg->def_method);
msg.args.codec_type = cpu_to_be32(cfg->codec);
msg.args.snd_method = cpu_to_be32(cfg->snd_method);
msg.args.cb_func = cpu_to_be32(0x11111111);
msg.args.client_data = cpu_to_be32(0x11223344);
msm_rpc_setup_req(&msg.hdr, AUDMGR_PROG, msm_rpc_get_vers(am->ept),
AUDMGR_ENABLE_CLIENT);
rc = msm_rpc_write(am->ept, &msg, sizeof(msg));
if (rc < 0)
return rc;
rc = wait_event_timeout(am->wait, am->state != STATE_ENABLING, 15 * HZ);
if (rc == 0) {
pr_err("audmgr_enable: ARM9 did not reply to RPC am->state = %d\n", am->state);
BUG();
}
if (am->state == STATE_ENABLED)
return 0;
pr_err("audmgr: unexpected state %d while enabling?!\n", am->state);
return -ENODEV;
}
EXPORT_SYMBOL(audmgr_enable);
int audmgr_disable(struct audmgr *am)
{
struct audmgr_disable_msg msg;
int rc;
if (am->state == STATE_DISABLED)
return 0;
msm_rpc_setup_req(&msg.hdr, AUDMGR_PROG, msm_rpc_get_vers(am->ept),
AUDMGR_DISABLE_CLIENT);
msg.handle = cpu_to_be32(am->handle);
am->state = STATE_DISABLING;
rc = msm_rpc_write(am->ept, &msg, sizeof(msg));
if (rc < 0)
return rc;
rc = wait_event_timeout(am->wait, am->state != STATE_DISABLING, 15 * HZ);
if (rc == 0) {
pr_err("audmgr_disable: ARM9 did not reply to RPC am->state = %d\n", am->state);
BUG();
}
if (am->state == STATE_DISABLED)
return 0;
pr_err("audmgr: unexpected state %d while disabling?!\n", am->state);
return -ENODEV;
}
EXPORT_SYMBOL(audmgr_disable);
|
