upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
2.8 KiB
109 lines
2.8 KiB
/*
|
|
* (C) Copyright 2009
|
|
* Frank Bodammer <frank.bodammer@gcd-solutions.de>
|
|
* (C) Copyright 2009 Semihalf, Grzegorz Bernacki
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <malloc.h>
|
|
#include <spi.h>
|
|
#include <mpc5xxx.h>
|
|
|
|
void spi_init(void)
|
|
{
|
|
struct mpc5xxx_spi *spi = (struct mpc5xxx_spi *)MPC5XXX_SPI;
|
|
/*
|
|
* Its important to use the correct order when initializing the
|
|
* registers
|
|
*/
|
|
out_8(&spi->ddr, 0x0F); /* set all SPI pins as output */
|
|
out_8(&spi->pdr, 0x00); /* set SS low */
|
|
/* SPI is master, SS is general purpose output */
|
|
out_8(&spi->cr1, SPI_CR_MSTR | SPI_CR_SPE);
|
|
out_8(&spi->cr2, 0x00); /* normal operation */
|
|
out_8(&spi->brr, 0x77); /* baud rate: IPB clock / 2048 */
|
|
}
|
|
|
|
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int mode)
|
|
{
|
|
struct spi_slave *slave;
|
|
|
|
slave = malloc(sizeof(struct spi_slave));
|
|
if (!slave)
|
|
return NULL;
|
|
|
|
slave->bus = bus;
|
|
slave->cs = cs;
|
|
|
|
return slave;
|
|
}
|
|
|
|
void spi_free_slave(struct spi_slave *slave)
|
|
{
|
|
free(slave);
|
|
}
|
|
|
|
int spi_claim_bus(struct spi_slave *slave)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void spi_release_bus(struct spi_slave *slave)
|
|
{
|
|
return;
|
|
}
|
|
|
|
int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
|
|
void *din, unsigned long flags)
|
|
{
|
|
struct mpc5xxx_spi *spi = (struct mpc5xxx_spi *)MPC5XXX_SPI;
|
|
int i, iter = bitlen >> 3;
|
|
const uchar *txp = dout;
|
|
uchar *rxp = din;
|
|
|
|
debug("spi_xfer: slave %u:%u dout %08X din %08X bitlen %u\n",
|
|
slave->bus, slave->cs, *(uint *) dout, *(uint *) din, bitlen);
|
|
|
|
if (flags & SPI_XFER_BEGIN)
|
|
setbits_8(&spi->pdr, SPI_PDR_SS);
|
|
|
|
for (i = 0; i < iter; i++) {
|
|
udelay(1000);
|
|
debug("spi_xfer: sending %x\n", txp[i]);
|
|
out_8(&spi->dr, txp[i]);
|
|
while (!(in_8(&spi->sr) & SPI_SR_SPIF)) {
|
|
udelay(1000);
|
|
if (in_8(&spi->sr) & SPI_SR_WCOL) {
|
|
rxp[i] = in_8(&spi->dr);
|
|
puts("spi_xfer: write collision\n");
|
|
return -1;
|
|
}
|
|
}
|
|
rxp[i] = in_8(&spi->dr);
|
|
debug("spi_xfer: received %x\n", rxp[i]);
|
|
}
|
|
if (flags & SPI_XFER_END)
|
|
clrbits_8(&spi->pdr, SPI_PDR_SS);
|
|
|
|
return 0;
|
|
}
|
|
|