diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/mcf5445x/Makefile | 2 | ||||
| -rw-r--r-- | cpu/mcf5445x/dspi.c | 73 |
2 files changed, 74 insertions, 1 deletions
diff --git a/cpu/mcf5445x/Makefile b/cpu/mcf5445x/Makefile index 26ec298..a549fdd 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 0000000..44d8505 --- /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 */ |