/*
* Copyright (C) 2007 Atmel Corporation
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <spi.h>
#include <asm/io.h>
#include <asm/arch/clk.h>
-#include <asm/arch/memory-map.h>
+#include <asm/arch/hardware.h>
#include "atmel_spi.h"
+static int spi_has_wdrbt(struct atmel_spi_slave *slave)
+{
+ unsigned int ver;
+
+ ver = spi_readl(slave, VERSION);
+
+ return (ATMEL_SPI_VERSION_REV(ver) >= 0x210);
+}
+
void spi_init()
{
u32 csrx;
void *regs;
- if (cs > 3 || !spi_cs_is_valid(bus, cs))
+ if (!spi_cs_is_valid(bus, cs))
return NULL;
switch (bus) {
case 0:
- regs = (void *)SPI0_BASE;
+ regs = (void *)ATMEL_BASE_SPI0;
break;
-#ifdef SPI1_BASE
+#ifdef ATMEL_BASE_SPI1
case 1:
- regs = (void *)SPI1_BASE;
+ regs = (void *)ATMEL_BASE_SPI1;
break;
#endif
-#ifdef SPI2_BASE
+#ifdef ATMEL_BASE_SPI2
case 2:
- regs = (void *)SPI2_BASE;
+ regs = (void *)ATMEL_BASE_SPI2;
break;
#endif
-#ifdef SPI3_BASE
+#ifdef ATMEL_BASE_SPI3
case 3:
- regs = (void *)SPI3_BASE;
+ regs = (void *)ATMEL_BASE_SPI3;
break;
#endif
default:
if (mode & SPI_CPOL)
csrx |= ATMEL_SPI_CSRx_CPOL;
- as = malloc(sizeof(struct atmel_spi_slave));
+ as = spi_alloc_slave(struct atmel_spi_slave, bus, cs);
if (!as)
return NULL;
- as->slave.bus = bus;
- as->slave.cs = cs;
as->regs = regs;
as->mr = ATMEL_SPI_MR_MSTR | ATMEL_SPI_MR_MODFDIS
| ATMEL_SPI_MR_PCS(~(1 << cs) & 0xf);
+ if (spi_has_wdrbt(as))
+ as->mr |= ATMEL_SPI_MR_WDRBT;
+
spi_writel(as, CSR(cs), csrx);
return &as->slave;
unsigned int len_tx;
unsigned int len_rx;
unsigned int len;
- int ret;
u32 status;
const u8 *txp = dout;
u8 *rxp = din;
u8 value;
- ret = 0;
if (bitlen == 0)
/* Finish any previously submitted transfers */
goto out;
* somewhat quirky, and it doesn't really buy us much anyway
* in the context of U-Boot.
*/
- if (flags & SPI_XFER_BEGIN)
+ if (flags & SPI_XFER_BEGIN) {
spi_cs_activate(slave);
+ /*
+ * sometimes the RDR is not empty when we get here,
+ * in theory that should not happen, but it DOES happen.
+ * Read it here to be on the safe side.
+ * That also clears the OVRES flag. Required if the
+ * following loop exits due to OVRES!
+ */
+ spi_readl(as, RDR);
+ }
for (len_tx = 0, len_rx = 0; len_rx < len; ) {
status = spi_readl(as, SR);