+// SPDX-License-Identifier: GPL-2.0
/*
* SH SPI driver
*
- * Copyright (C) 2011 Renesas Solutions Corp.
- *
- * 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; version 2 of the License.
- *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
+ * Copyright (C) 2011-2012 Renesas Solutions Corp.
*/
#include <common.h>
+#include <console.h>
#include <malloc.h>
#include <spi.h>
#include <asm/io.h>
{
}
+static void sh_spi_set_cs(struct sh_spi *ss, unsigned int cs)
+{
+ unsigned long val = 0;
+
+ if (cs & 0x01)
+ val |= SH_SPI_SSS0;
+ if (cs & 0x02)
+ val |= SH_SPI_SSS1;
+
+ sh_spi_clear_bit(SH_SPI_SSS0 | SH_SPI_SSS1, &ss->regs->cr4);
+ sh_spi_set_bit(val, &ss->regs->cr4);
+}
+
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
if (!spi_cs_is_valid(bus, cs))
return NULL;
- ss = malloc(sizeof(struct spi_slave));
+ ss = spi_alloc_slave(struct sh_spi, bus, cs);
if (!ss)
return NULL;
- ss->slave.bus = bus;
- ss->slave.cs = cs;
ss->regs = (struct sh_spi_regs *)CONFIG_SH_SPI_BASE;
/* SPI sycle stop */
sh_spi_write(0x00, &ss->regs->cr1);
/* CR3 init */
sh_spi_write(0x00, &ss->regs->cr3);
+ sh_spi_set_cs(ss, cs);
clear_fifo(ss);
{
int i, cur_len, ret = 0;
int remain = (int)len;
- unsigned long tmp;
if (len >= SH_SPI_FIFO_SIZE)
sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);
}
if (flags & SPI_XFER_END) {
- tmp = sh_spi_read(&ss->regs->cr1);
- tmp = tmp & ~(SH_SPI_SSD | SH_SPI_SSDB);
- sh_spi_write(tmp, &ss->regs->cr1);
+ sh_spi_clear_bit(SH_SPI_SSD | SH_SPI_SSDB, &ss->regs->cr1);
sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);
udelay(100);
write_fifo_empty_wait(ss);
unsigned int len, unsigned long flags)
{
int i;
- unsigned long tmp;
if (len > SH_SPI_MAX_BYTE)
sh_spi_write(SH_SPI_MAX_BYTE, &ss->regs->cr3);
else
sh_spi_write(len, &ss->regs->cr3);
- tmp = sh_spi_read(&ss->regs->cr1);
- tmp = tmp & ~(SH_SPI_SSD | SH_SPI_SSDB);
- sh_spi_write(tmp, &ss->regs->cr1);
+ sh_spi_clear_bit(SH_SPI_SSD | SH_SPI_SSDB, &ss->regs->cr1);
sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);
for (i = 0; i < len; i++) {
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
- /* This driver supports "bus = 0" and "cs = 0" only. */
- if (!bus && !cs)
+ if (!bus && cs < SH_SPI_NUM_CS)
return 1;
else
return 0;
{
}
-