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
|
/*
* tcpal_io_i2c.c
*
* Author: <linux@telechips.com>
* Description: Telechips broadcast driver
*
* Copyright (c) Telechips, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tcpal_os.h"
#include "tcpal_debug.h"
#include "tcbd_feature.h"
#include "tcbd_api_common.h"
#include "tcbd_drv_io.h"
#include <linux/module.h>
#include <linux/semaphore.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <asm/mach-types.h>
#define MAX_I2C_BURST 512
#define Bit7 0x00000080
#define I2C_BUS 1
#define I2C_ADDR (0xA0>>1)
#if defined(__I2C_STS__)
static u8 static_buffer_i2c[MAX_I2C_BURST+4];
static struct i2c_client *tcpal_i2c_client;
static const struct i2c_device_id tcpal_i2c_id[] = {
{"tc317x", 0},
};
static s32 tcpal_i2c_probe(
struct i2c_client *i2c, const struct i2c_device_id *id)
{
s32 ret = 0;
tcpal_i2c_client = i2c;
tcbd_debug(DEBUG_TCPAL_I2C, "tcpal_i2c_client : %p\n", i2c);
return ret;
}
static s32 tcpal_i2c_remove(struct i2c_client *client)
{
tcbd_debug(DEBUG_TCPAL_I2C, "tcpal_i2c_client : %p\n", client);
return 0;
}
MODULE_DEVICE_TABLE(i2c, tcpal_i2c_id);
static struct i2c_driver tcpal_i2c_driver = {
.driver = {
.name = "tc317x",
.owner = THIS_MODULE,
},
.probe = tcpal_i2c_probe,
.remove = tcpal_i2c_remove,
.id_table = tcpal_i2c_id,
};
static s32 tcpal_i2c_add_device(void)
{
s32 ret;
struct i2c_board_info info;
struct i2c_adapter *adapter;
struct i2c_client *client;
ret = i2c_add_driver(&tcpal_i2c_driver);
if (ret < 0) {
tcbd_debug(DEBUG_TCPAL_I2C, "can't add i2c driver\n");
return ret;
}
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = I2C_ADDR;
strlcpy(info.type, "tc317x", I2C_NAME_SIZE);
adapter = i2c_get_adapter(I2C_BUS);
if (!adapter) {
tcbd_debug(DEBUG_TCPAL_I2C,
"can't get i2c adapter :%d\n", I2C_BUS);
goto err_driver;
}
client = i2c_new_device(adapter, &info);
i2c_put_adapter(adapter);
if (!client) {
tcbd_debug(DEBUG_TCPAL_I2C,
"can't add i2c device at 0x%X\n", info.addr);
goto err_driver;
}
return 0;
err_driver:
i2c_del_driver(&tcpal_i2c_driver);
return -ENODEV;
}
static s32 tcpal_i2c_close(void)
{
i2c_unregister_device(tcpal_i2c_client);
i2c_del_driver(&tcpal_i2c_driver);
return 0;
}
static s32 tcpal_i2c_open(void)
{
return tcpal_i2c_add_device();
}
static s32 tcpal_i2c_reg_read(
u8 _reg_addr, u8 *_data)
{
s32 ret = 0;
if (!tcpal_i2c_client)
return -TCERR_OS_DRIVER_FAIL;
ret = i2c_master_send(tcpal_i2c_client, &_reg_addr, 1);
ret |= i2c_master_recv(tcpal_i2c_client, _data, 1);
if (ret < 0) {
tcbd_debug(DEBUG_TCPAL_I2C,
"I2C read error %d\n", ret);
return -TCERR_OS_DRIVER_FAIL;
}
return 0;
}
static s32 tcpal_i2c_reg_write(u8 _reg_addr, u8 _data)
{
s32 ret = 0;
u8 buf[2];
if (!tcpal_i2c_client)
return -TCERR_OS_DRIVER_FAIL;
buf[0] = _reg_addr;
buf[1] = _data;
ret = i2c_master_send(tcpal_i2c_client, buf, 2);
if (ret < 0)
return -TCERR_OS_DRIVER_FAIL;
return 0;
}
static inline s32 tcpal_i2c_reg_read_burst(
u8 _reg_addr, u8 *_data, s32 _size)
{
s32 i, ret = 0;
s32 num_chunk, remain, sent, recvd;
num_chunk = _size / MAX_I2C_BURST;
remain = _size % MAX_I2C_BURST;
if (!tcpal_i2c_client)
return -TCERR_OS_DRIVER_FAIL;
for (i = 0; i < num_chunk; i++) {
sent = i2c_master_send(tcpal_i2c_client, &_reg_addr, 1);
if (sent < 1) {
tcbd_debug(DEBUG_TCPAL_I2C,
"I2C Multi read 8 Addr Error!! %d\n", sent);
return -TCERR_OS_DRIVER_FAIL;
}
recvd = i2c_master_recv(
tcpal_i2c_client,
&_data[i*MAX_I2C_BURST],
MAX_I2C_BURST);
if (recvd < 0) {
tcbd_debug(DEBUG_TCPAL_I2C,
"I2C Multi read 8 data Error!! %d\n", recvd);
return -TCERR_OS_DRIVER_FAIL;
}
}
if (remain) {
sent = i2c_master_send(tcpal_i2c_client, &_reg_addr, 1);
if (sent < 1) {
tcbd_debug(DEBUG_TCPAL_I2C,
"I2C Multi read 8 Addr Error!!, %d\n", sent);
return -TCERR_OS_DRIVER_FAIL;
}
ret = i2c_master_recv(
tcpal_i2c_client,
&_data[num_chunk * MAX_I2C_BURST],
remain);
if (ret < 0) {
tcbd_debug(DEBUG_TCPAL_I2C,
"I2C Multi read 8 data Error!!\n");
return -TCERR_OS_DRIVER_FAIL;
}
}
return 0;
}
static inline s32 tcpal_i2c_reg_write_burst(
u8 _reg_addr, u8 *_data, s32 _size)
{
s32 ret = 0;
s32 num_chunk, remain, sent;
s32 i;
if (!tcpal_i2c_client)
return -TCERR_OS_DRIVER_FAIL;
num_chunk = _size/MAX_I2C_BURST;
remain = _size%MAX_I2C_BURST;
static_buffer_i2c[0] = _reg_addr;
for (i = 0; i < num_chunk; i++) {
memcpy(&static_buffer_i2c[1], &_data[i*MAX_I2C_BURST],
MAX_I2C_BURST);
sent = i2c_master_send(
tcpal_i2c_client,
static_buffer_i2c,
MAX_I2C_BURST+1);
if (ret < 0 || sent < 1) {
tcbd_debug(DEBUG_TCPAL_I2C,
"I2C write error %d\n", ret);
return -TCERR_OS_DRIVER_FAIL;
}
}
if (remain) {
memcpy(&static_buffer_i2c[1],
&_data[num_chunk * MAX_I2C_BURST],
remain);
ret = i2c_master_send(
tcpal_i2c_client,
static_buffer_i2c,
remain+1);
if (ret < 1) {
tcbd_debug(DEBUG_TCPAL_I2C, "I2C write error!\n");
return -TCERR_OS_DRIVER_FAIL;
}
}
return 0;
}
static s32 tcpal_i2c_reg_read_burst_fix(
u8 _reg_addr, u8 *_data, s32 _size)
{
return tcpal_i2c_reg_read_burst(_reg_addr|Bit7, _data, _size);
}
static s32 tcpal_i2c_reg_write_burst_fix(
u8 _reg_addr, u8 *_data, s32 _size)
{
return tcpal_i2c_reg_write_burst(_reg_addr|Bit7, _data, _size);
}
static s32 tcpal_i2c_reg_read_burst_cont(
u8 _reg_addr, u8 *_data, s32 _size)
{
return tcpal_i2c_reg_read_burst(_reg_addr, _data, _size);
}
static s32 tcpal_i2c_reg_write_burst_cont(
u8 _reg_addr, u8 *_data, s32 _size)
{
return tcpal_i2c_reg_write_burst(_reg_addr, _data, _size);
}
void tcpal_set_i2c_io_function(void)
{
struct tcbd_io_data *tcbd_i2c_io_funcs = tcbd_get_io_struct();
tcbd_i2c_io_funcs->open = tcpal_i2c_open;
tcbd_i2c_io_funcs->close = tcpal_i2c_close;
tcbd_i2c_io_funcs->reg_write = tcpal_i2c_reg_write;
tcbd_i2c_io_funcs->reg_read = tcpal_i2c_reg_read;
tcbd_i2c_io_funcs->reg_write_burst_cont =
tcpal_i2c_reg_write_burst_cont;
tcbd_i2c_io_funcs->reg_read_burst_cont =
tcpal_i2c_reg_read_burst_cont;
tcbd_i2c_io_funcs->reg_write_burst_fix =
tcpal_i2c_reg_write_burst_fix;
tcbd_i2c_io_funcs->reg_read_burst_fix =
tcpal_i2c_reg_read_burst_fix;
}
#endif /*__I2C_STS__ */
|
