Hi, Shioda-san.
2011/1/17 Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com:
SH7757 has SPI module. This patch supports it.
Signed-off-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com
drivers/spi/Makefile | 1 + drivers/spi/sh_spi.c | 295 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 296 insertions(+), 0 deletions(-) create mode 100644 drivers/spi/sh_spi.c
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index e34a124..d582fbb 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -37,6 +37,7 @@ COBJS-$(CONFIG_MPC8XXX_SPI) += mpc8xxx_spi.o COBJS-$(CONFIG_MXC_SPI) += mxc_spi.o COBJS-$(CONFIG_OMAP3_SPI) += omap3_spi.o COBJS-$(CONFIG_SOFT_SPI) += soft_spi.o +COBJS-$(CONFIG_SH_SPI) += sh_spi.o
COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/spi/sh_spi.c b/drivers/spi/sh_spi.c new file mode 100644 index 0000000..89ea5e2 --- /dev/null +++ b/drivers/spi/sh_spi.c @@ -0,0 +1,295 @@ +/*
- 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
- */
+#include <common.h> +#include <malloc.h> +#include <spi.h> +#include <asm/io.h>
+#define SPI_TBR 0x00 +#define SPI_RBR 0x00 +#define SPI_CR1 0x08 +#define SPI_CR2 0x10 +#define SPI_CR3 0x18 +#define SPI_CR4 0x20
+/* CR1 */ +#define SPI_TBE 0x80 +#define SPI_TBF 0x40 +#define SPI_RBE 0x20 +#define SPI_RBF 0x10 +#define SPI_PFONRD 0x08 +#define SPI_SSDB 0x04 +#define SPI_SSD 0x02 +#define SPI_SSA 0x01
+/* CR2 */ +#define SPI_RSTF 0x80 +#define SPI_LOOPBK 0x40 +#define SH_SPI_CPOL 0x20 +#define SH_SPI_CPHA 0x10 +#define SPI_L1M0 0x08
+/* CR3 */ +#define SPI_MAX_BYTE 0xFF
+/* CR4 */ +#define SPI_TBEI 0x80 +#define SPI_TBFI 0x40 +#define SPI_RBEI 0x20 +#define SPI_RBFI 0x10 +#define SPI_WPABRT 0x04 +#define SPI_SSS 0x01
+#define SPI_FIFO_SIZE 32
Please add prefix of "SH_".
+static void sh_spi_write(unsigned long data, unsigned long offset) +{
- writel(data, CONFIG_SH_SPI_BASE + offset);
+}
<snip>
> +
+int spi_cs_is_valid(unsigned int bus, unsigned int cs) +{
- return 1;
+}
Why does this function return "1" every time?
+void spi_cs_activate(struct spi_slave *slave) +{
+}
+void spi_cs_deactivate(struct spi_slave *slave) +{
+}
-- 1.7.1
Best regards, Nobuhiro