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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2010-2020 CS Group
* Charles Frey <charles.frey@c-s.fr>
* Florent Trinh Thai <florent.trinh-thai@c-s.fr>
* Christophe Leroy <christophe.leroy@c-s.fr>
*
* Common specific routines for the CS Group boards
*/
#include <dm.h>
#include <fdt_support.h>
#include <spi.h>
#define SPI_EEPROM_READ 0x03
static int fdt_set_node_and_value(void *blob, char *node, const char *prop,
void *var, int size)
{
int ret, off;
off = fdt_path_offset(blob, node);
if (off < 0) {
printf("Cannot find %s node err:%s\n", node, fdt_strerror(off));
return off;
}
ret = fdt_setprop(blob, off, prop, var, size);
if (ret < 0)
printf("Cannot set %s/%s prop err: %s\n", node, prop, fdt_strerror(ret));
return ret;
}
/* Checks front/rear id and remove unneeded nodes from the blob */
void ft_cleanup(void *blob, unsigned long id, const char *prop, const char *compatible)
{
int off;
off = fdt_node_offset_by_compatible(blob, -1, compatible);
while (off != -FDT_ERR_NOTFOUND) {
const struct fdt_property *ids;
int nb_ids, idx;
int tmp = -1;
ids = fdt_get_property(blob, off, prop, &nb_ids);
for (idx = 0; idx < nb_ids; idx += 4) {
if (*((uint32_t *)&ids->data[idx]) == id)
break;
}
if (idx >= nb_ids)
fdt_del_node(blob, off);
else
tmp = off;
off = fdt_node_offset_by_compatible(blob, tmp, compatible);
}
fdt_set_node_and_value(blob, "/", prop, &id, sizeof(uint32_t));
}
int read_eeprom(u8 *din, int len)
{
struct udevice *eeprom;
struct spi_slave *slave;
uchar dout[3] = {SPI_EEPROM_READ, 0, 0};
int ret;
ret = uclass_get_device(UCLASS_SPI, 0, &eeprom);
if (ret)
return ret;
ret = _spi_get_bus_and_cs(0, 0, 1000000, 0, "spi_generic_drv",
"generic_0:0", &eeprom, &slave);
if (ret)
return ret;
ret = spi_claim_bus(slave);
ret = spi_xfer(slave, sizeof(dout) << 3, dout, NULL, SPI_XFER_BEGIN);
if (ret)
return ret;
ret = spi_xfer(slave, len << 3, NULL, din, SPI_XFER_END);
if (ret)
return ret;
spi_release_bus(slave);
return 0;
}
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