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authorPrafulla Wadaskar <prafulla@marvell.com>2009-05-30 01:13:33 +0530
committerJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2009-06-26 00:59:09 +0200
commit5710de45808eb8f1cc34b51dc3e67e2422113249 (patch)
tree393f48ac2db05d22e8de64bd606de9ae13e74f27 /include/asm-arm/arch-kirkwood
parent6bde171a4c4116cee179167cb65335a28f99932d (diff)
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spi: Add Marvell Kirkwood SPI driver
This patch adds a SPI driver for the Marvell Kirkwood SoC's. Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
Diffstat (limited to 'include/asm-arm/arch-kirkwood')
-rw-r--r--include/asm-arm/arch-kirkwood/spi.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/include/asm-arm/arch-kirkwood/spi.h b/include/asm-arm/arch-kirkwood/spi.h
new file mode 100644
index 0000000..1d5043f
--- /dev/null
+++ b/include/asm-arm/arch-kirkwood/spi.h
@@ -0,0 +1,56 @@
+/*
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * Derived from drivers/spi/mpc8xxx_spi.c
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __KW_SPI_H__
+#define __KW_SPI_H__
+
+/* SPI Registers on kirkwood SOC */
+struct kwspi_registers {
+ u32 ctrl; /* 0x10600 */
+ u32 cfg; /* 0x10604 */
+ u32 dout; /* 0x10608 */
+ u32 din; /* 0x1060c */
+ u32 irq_cause; /* 0x10610 */
+ u32 irq_mask; /* 0x10614 */
+};
+
+#define KWSPI_CLKPRESCL_MASK 0x1f
+#define KWSPI_CSN_ACT 1 /* Activates serial memory interface */
+#define KWSPI_SMEMRDY (1 << 1) /* SerMem Data xfer ready */
+#define KWSPI_IRQUNMASK 1 /* unmask SPI interrupt */
+#define KWSPI_IRQMASK 0 /* mask SPI interrupt */
+#define KWSPI_SMEMRDIRQ 1 /* SerMem data xfer ready irq */
+#define KWSPI_XFERLEN_1BYTE 0
+#define KWSPI_XFERLEN_2BYTE (1 << 5)
+#define KWSPI_XFERLEN_MASK (1 << 5)
+#define KWSPI_ADRLEN_1BYTE 0
+#define KWSPI_ADRLEN_2BYTE 1 << 8
+#define KWSPI_ADRLEN_3BYTE 2 << 8
+#define KWSPI_ADRLEN_4BYTE 3 << 8
+#define KWSPI_ADRLEN_MASK 3 << 8
+#define KWSPI_TIMEOUT 10000
+
+#endif /* __KW_SPI_H__ */