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/* 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 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;
}
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