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authorPrabhakar Kushwaha <prabhakar@freescale.com>2013-01-23 17:59:37 +0000
committerAndy Fleming <afleming@freescale.com>2013-01-30 11:25:15 -0600
commit960aa89bda0754cc1c4418c5d21e7ff23dc34a82 (patch)
tree89c1cca69d5186ef6e2882bfa2300a023074b2bb
parent72bd83cd0a12f411983d33b5f24adc16b9b77313 (diff)
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board/common: Add support for QIXIS read/write using i2c
QIXIS FPGA is accessable via both i2c and flash controller. Only flash controller access is supported. Add support of i2c based access. It is quite useful in the scenario where either flash controller path is broken or not present. Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com> Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
-rw-r--r--board/freescale/common/qixis.c14
-rw-r--r--board/freescale/common/qixis.h9
2 files changed, 23 insertions, 0 deletions
diff --git a/board/freescale/common/qixis.c b/board/freescale/common/qixis.c
index f7d2f46..2b74d02 100644
--- a/board/freescale/common/qixis.c
+++ b/board/freescale/common/qixis.c
@@ -15,8 +15,22 @@
#include <command.h>
#include <asm/io.h>
#include <linux/time.h>
+#include <i2c.h>
#include "qixis.h"
+#ifdef CONFIG_SYS_I2C_FPGA_ADDR
+u8 qixis_read_i2c(unsigned int reg)
+{
+ return i2c_reg_read(CONFIG_SYS_I2C_FPGA_ADDR, reg);
+}
+
+void qixis_write_i2c(unsigned int reg, u8 value)
+{
+ u8 val = value;
+ i2c_reg_write(CONFIG_SYS_I2C_FPGA_ADDR, reg, val);
+}
+#endif
+
u8 qixis_read(unsigned int reg)
{
void *p = (void *)QIXIS_BASE;
diff --git a/board/freescale/common/qixis.h b/board/freescale/common/qixis.h
index 2b8f607..8d914d5 100644
--- a/board/freescale/common/qixis.h
+++ b/board/freescale/common/qixis.h
@@ -92,8 +92,17 @@ u16 qixis_read_minor(void);
char *qixis_read_time(char *result);
char *qixis_read_tag(char *buf);
const char *byte_to_binary_mask(u8 val, u8 mask, char *buf);
+#ifdef CONFIG_SYS_I2C_FPGA_ADDR
+u8 qixis_read_i2c(unsigned int reg);
+void qixis_write_i2c(unsigned int reg, u8 value);
+#endif
#define QIXIS_READ(reg) qixis_read(offsetof(struct qixis, reg))
#define QIXIS_WRITE(reg, value) qixis_write(offsetof(struct qixis, reg), value)
+#ifdef CONFIG_SYS_I2C_FPGA_ADDR
+#define QIXIS_READ_I2C(reg) qixis_read_i2c(offsetof(struct qixis, reg))
+#define QIXIS_WRITE_I2C(reg, value) \
+ qixis_write_i2c(offsetof(struct qixis, reg), value)
+#endif
#endif