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
|
/*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <console/console.h>
#include <device/i2c_simple.h>
#include <string.h>
#include <soc/gsbi.h>
#include <soc/qup.h>
static qup_config_t gsbi1_qup_config = {
QUP_MINICORE_I2C_MASTER,
100000,
24000000,
QUP_MODE_FIFO,
0
};
static qup_config_t gsbi4_qup_config = {
QUP_MINICORE_I2C_MASTER,
100000,
24000000,
QUP_MODE_FIFO,
0
};
static qup_config_t gsbi7_qup_config = {
QUP_MINICORE_I2C_MASTER,
100000,
24000000,
QUP_MODE_FIFO,
0
};
static int i2c_read(uint32_t gsbi_id, uint8_t slave,
uint8_t *data, int data_len)
{
qup_data_t obj;
qup_return_t qup_ret = 0;
memset(&obj, 0, sizeof(obj));
obj.protocol = QUP_MINICORE_I2C_MASTER;
obj.p.iic.addr = slave;
obj.p.iic.data_len = data_len;
obj.p.iic.data = data;
qup_ret = qup_recv_data(gsbi_id, &obj);
if (QUP_SUCCESS != qup_ret)
return 1;
else
return 0;
}
static int i2c_write(uint32_t gsbi_id, uint8_t slave,
uint8_t *data, int data_len, uint8_t stop_seq)
{
qup_data_t obj;
qup_return_t qup_ret = 0;
memset(&obj, 0, sizeof(obj));
obj.protocol = QUP_MINICORE_I2C_MASTER;
obj.p.iic.addr = slave;
obj.p.iic.data_len = data_len;
obj.p.iic.data = data;
qup_ret = qup_send_data(gsbi_id, &obj, stop_seq);
if (QUP_SUCCESS != qup_ret)
return 1;
else
return 0;
}
static int i2c_init(unsigned int bus)
{
unsigned int gsbi_id = bus;
qup_config_t *qup_config;
switch (gsbi_id) {
case GSBI_ID_1:
qup_config = &gsbi1_qup_config;
break;
case GSBI_ID_4:
qup_config = &gsbi4_qup_config;
break;
case GSBI_ID_7:
qup_config = &gsbi7_qup_config;
break;
default:
printk(BIOS_ERR, "QUP configuration not defind for GSBI%d.\n",
gsbi_id);
return 1;
}
if (qup_config->initialized)
return 0;
if (gsbi_init(gsbi_id, GSBI_PROTO_I2C_ONLY)) {
printk(BIOS_ERR, "failed to initialize gsbi\n");
return 1;
}
if (qup_init(gsbi_id, qup_config)) {
printk(BIOS_ERR, "failed to initialize qup\n");
return 1;
}
if (qup_reset_i2c_master_status(gsbi_id)) {
printk(BIOS_ERR, "failed to reset i2c master status\n");
return 1;
}
qup_config->initialized = 1;
return 0;
}
int platform_i2c_transfer(unsigned int bus, struct i2c_msg *segments,
int seg_count)
{
struct i2c_msg *seg = segments;
int ret = 0;
if (i2c_init(bus))
return 1;
while (!ret && seg_count--) {
if (seg->flags & I2C_M_RD)
ret = i2c_read(bus, seg->slave, seg->buf, seg->len);
else
ret = i2c_write(bus, seg->slave, seg->buf, seg->len,
(seg_count ? 0 : 1));
seg++;
}
if (ret) {
qup_set_state(bus, QUP_STATE_RESET);
return 1;
}
return 0;
}
|
