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
|
/* SPDX-License-Identifier: BSD-3-Clause */
#include <assert.h>
#include <console/console.h>
#include <device/i2c_simple.h>
#include <string.h>
#include <soc/blsp.h>
#include <soc/qup.h>
#include <soc/gpio.h>
static qup_config_t blsp1_qup0_config = {
QUP_MINICORE_I2C_MASTER,
400000,
19200000,
QUP_MODE_BLOCK,
0
};
static qup_config_t blsp1_qup1_config = {
QUP_MINICORE_I2C_MASTER,
400000,
19200000,
QUP_MODE_BLOCK,
0
};
static qup_config_t blsp1_qup2_config = {
QUP_MINICORE_I2C_MASTER,
400000,
19200000,
QUP_MODE_BLOCK,
0
};
static qup_config_t blsp1_qup3_config = {
QUP_MINICORE_I2C_MASTER,
400000,
19200000,
QUP_MODE_BLOCK,
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_ret != QUP_SUCCESS)
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_ret != QUP_SUCCESS)
return 1;
else
return 0;
}
static int i2c_init(blsp_qup_id_t id)
{
qup_config_t *qup_config;
switch (id) {
case BLSP_QUP_ID_0:
qup_config = &blsp1_qup0_config;
break;
case BLSP_QUP_ID_1:
qup_config = &blsp1_qup1_config;
break;
case BLSP_QUP_ID_2:
qup_config = &blsp1_qup2_config;
break;
case BLSP_QUP_ID_3:
qup_config = &blsp1_qup3_config;
break;
default:
printk(BIOS_ERR, "QUP configuration not defined for BLSP%d.\n",
id);
return 1;
}
if (qup_config->initialized)
return 0;
if (blsp_i2c_init(id)) {
printk(BIOS_ERR, "failed to initialize blsp\n");
return 1;
}
if (qup_init(id, qup_config)) {
printk(BIOS_ERR, "failed to initialize qup\n");
return 1;
}
if (qup_reset_i2c_master_status(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;
}
|
