ColdFire: Add dspi and serial flash support for MCF5445x

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Acked-by: John Rigby <jrigby@freescale.com>

2 files changed, 74 insertions, 1 deletions

diff --git a/cpu/mcf5445x/Makefile b/cpu/mcf5445x/Makefile
index 26ec29895e..a549fdd2a3 100644
--- a/cpu/mcf5445x/Makefile
+++ b/cpu/mcf5445x/Makefile
@@ -28,7 +28,7 @@ include $(TOPDIR)/config.mk
 LIB	= lib$(CPU).a
 
 START	= start.o
-COBJS	= cpu.o speed.o cpu_init.o interrupts.o pci.o
+COBJS	= cpu.o speed.o cpu_init.o interrupts.o pci.o dspi.o
 
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/cpu/mcf5445x/dspi.c b/cpu/mcf5445x/dspi.c
new file mode 100644
index 0000000000..44d8505bcd
--- /dev/null
+++ b/cpu/mcf5445x/dspi.c
@@ -0,0 +1,73 @@
+/*
+ *
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * 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 <spi.h>
+
+#if defined(CONFIG_CF_DSPI)
+#include <asm/immap.h>
+void dspi_init(void)
+{
+	volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+	volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
+
+	gpio->par_dspi = GPIO_PAR_DSPI_PCS5_PCS5 | GPIO_PAR_DSPI_PCS2_PCS2 |
+	    GPIO_PAR_DSPI_PCS1_PCS1 | GPIO_PAR_DSPI_PCS0_PCS0 |
+	    GPIO_PAR_DSPI_SIN_SIN | GPIO_PAR_DSPI_SOUT_SOUT |
+	    GPIO_PAR_DSPI_SCK_SCK;
+
+	dspi->dmcr = DSPI_DMCR_MSTR | DSPI_DMCR_CSIS7 | DSPI_DMCR_CSIS6 |
+	    DSPI_DMCR_CSIS5 | DSPI_DMCR_CSIS4 | DSPI_DMCR_CSIS3 |
+	    DSPI_DMCR_CSIS2 | DSPI_DMCR_CSIS1 | DSPI_DMCR_CSIS0 |
+	    DSPI_DMCR_CRXF | DSPI_DMCR_CTXF;
+
+	dspi->dctar0 = DSPI_DCTAR_TRSZ(7) | DSPI_DCTAR_CPOL | DSPI_DCTAR_CPHA |
+	    DSPI_DCTAR_PCSSCK_1CLK | DSPI_DCTAR_PASC(0) |
+	    DSPI_DCTAR_PDT(0) | DSPI_DCTAR_CSSCK(0) |
+	    DSPI_DCTAR_ASC(0) | DSPI_DCTAR_PBR(0) |
+	    DSPI_DCTAR_DT(1) | DSPI_DCTAR_BR(1);
+}
+
+void dspi_tx(int chipsel, u8 attrib, u16 data)
+{
+	volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
+
+	while ((dspi->dsr & 0x0000F000) >= 4) ;
+
+	dspi->dtfr = (attrib << 24) | ((1 << chipsel) << 16) | data;
+}
+
+u16 dspi_rx(void)
+{
+	volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
+
+	while ((dspi->dsr & 0x000000F0) == 0) ;
+
+	return (dspi->drfr & 0xFFFF);
+}
+
+#endif				/* CONFIG_HARD_SPI */