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
|
/* SPDX-License-Identifier: BSD-3-Clause */
#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 defined 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;
}
|
