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-rw-r--r--include/imx_spi.h97
1 files changed, 97 insertions, 0 deletions
diff --git a/include/imx_spi.h b/include/imx_spi.h
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+++ b/include/imx_spi.h
@@ -0,0 +1,97 @@
+/*
+ * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
+ *
+ * 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
+ */
+
+#ifndef __IMX_SPI_H__
+#define __IMX_SPI_H__
+
+#include <spi.h>
+
+#undef IMX_SPI_DEBUG
+
+#define IMX_SPI_ACTIVE_HIGH 1
+#define IMX_SPI_ACTIVE_LOW 0
+#define SPI_RETRY_TIMES 100
+
+#if defined(IMX_CSPI_VER_0_7)
+ #define SPI_RX_DATA 0x0
+ #define SPI_TX_DATA 0x4
+ #define SPI_CON_REG 0x8
+ #define SPI_INT_REG 0xC
+ #define SPI_DMA_REG 0x10
+ #define SPI_STAT_REG 0x14
+ #define SPI_PERIOD_REG 0x18
+
+ #define SPI_CTRL_EN (1 << 0)
+ #define SPI_CTRL_MODE (1 << 1)
+ #define SPI_CTRL_REG_XCH_BIT (1 << 2)
+ #define SPI_CTRL_SSPOL (1 << 7)
+ #define SPI_CTRL_SSPOL_OFF (7)
+ #define SPI_CTRL_SSCTL (1 << 6)
+ #define SPI_CTRL_SSCTL_OFF (6)
+ #define SPI_CTRL_SCLK_POL (1 << 4)
+ #define SPI_CTRL_SCLK_POL_OFF (4)
+ #define SPI_CTRL_SCLK_PHA (1 << 5)
+ #define SPI_CTRL_SCLK_PHA_OFF (5)
+ #define SPI_CTRL_SS_OFF (12)
+ #define SPI_CTRL_SS_MASK (3 << 12)
+ #define SPI_CTRL_DATA_OFF (16)
+ #define SPI_CTRL_DATA_MASK (7 << 16)
+ #define SPI_CTRL_BURST_OFF (20)
+ #define SPI_CTRL_BURST_MASK (0xFFF << 20)
+ #define SPI_INT_STAT_TC (1 << 7)
+
+#elif defined(IMX_CSPI_VER_2_3)
+ #define SPI_RX_DATA 0x0
+ #define SPI_TX_DATA 0x4
+ #define SPI_CON_REG 0x8
+ #define SPI_CFG_REG 0xC
+ #define SPI_INT_REG 0x10
+ #define SPI_DMA_REG 0x14
+ #define SPI_STAT_REG 0x18
+ #define SPI_PERIOD_REG 0x1C
+#endif
+
+struct spi_reg_t {
+ u32 ctrl_reg;
+ u32 cfg_reg;
+};
+
+struct imx_spi_dev_t {
+ struct spi_slave slave;
+ u32 base; /* base address of SPI module */
+ u32 freq; /* desired clock freq in Hz for this device */
+ u32 ss_pol; /* ss polarity: 1=active high; 0=active low */
+ u32 ss; /* slave select */
+ u32 in_sctl; /* inactive sclk ctl: 1=stay low; 0=stay high */
+ u32 in_dctl; /* inactive data ctl: 1=stay low; 0=stay high */
+ u32 ssctl; /* single burst mode vs multiple: 0=single; 1=multi */
+ u32 sclkpol; /* sclk polarity: active high=0; active low=1 */
+ u32 sclkpha; /* sclk phase: 0=phase 0; 1=phase1 */
+ u32 fifo_sz; /* fifo size in bytes for either tx or rx. */
+ u32 us_delay; /* us delay in each xfer */
+ struct spi_reg_t reg; /* pointer to a set of SPI registers */
+};
+
+extern void spi_io_init(struct imx_spi_dev_t *dev, int active);
+extern s32 spi_get_cfg(struct imx_spi_dev_t *dev);
+
+#endif /* __IMX_SPI_H__ */