[U-Boot] [PATCH] armv8/ls1043ardb: fix the limitation of using 'cpld reset'

[Gong Qianyu]

The current 'cpld reset' will just write global_rst register
but couldn't switch to NOR boot if the board's switches are
for NAND/SD boot. So need to write rcw source registers for
NOR boot as well.

Signed-off-by: Gong Qianyu <Qianyu.Gong at nxp.com>
---
 board/freescale/ls1043ardb/cpld.c | 26 ++++++++++++++++++++++++--
 board/freescale/ls1043ardb/cpld.h |  1 +
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/board/freescale/ls1043ardb/cpld.c b/board/freescale/ls1043ardb/cpld.c
index 78c2824..c645283 100644
--- a/board/freescale/ls1043ardb/cpld.c
+++ b/board/freescale/ls1043ardb/cpld.c
@@ -28,10 +28,18 @@ void cpld_write(unsigned int reg, u8 value)
 /* Set the boot bank to the alternate bank */
 void cpld_set_altbank(void)
 {
+	u16 reg = CPLD_CFG_RCW_SRC_NOR;
 	u8 reg4 = CPLD_READ(soft_mux_on);
+	u8 reg5 = (u8)(reg >> 1);
+	u8 reg6 = (u8)(reg & 1);
 	u8 reg7 = CPLD_READ(vbank);
 
-	CPLD_WRITE(soft_mux_on, reg4 | CPLD_SW_MUX_BANK_SEL);
+	cpld_rev_bit(&reg5);
+
+	CPLD_WRITE(soft_mux_on, reg4 | CPLD_SW_MUX_BANK_SEL | 1);
+
+	CPLD_WRITE(cfg_rcw_src1, reg5);
+	CPLD_WRITE(cfg_rcw_src2, reg6);
 
 	reg7 = (reg7 & ~CPLD_BANK_SEL_MASK) | CPLD_BANK_SEL_ALTBANK;
 	CPLD_WRITE(vbank, reg7);
@@ -42,7 +50,21 @@ void cpld_set_altbank(void)
 /* Set the boot bank to the default bank */
 void cpld_set_defbank(void)
 {
-	CPLD_WRITE(global_rst, 1);
+	u16 reg = CPLD_CFG_RCW_SRC_NOR;
+	u8 reg4 = CPLD_READ(soft_mux_on);
+	u8 reg5 = (u8)(reg >> 1);
+	u8 reg6 = (u8)(reg & 1);
+
+	cpld_rev_bit(&reg5);
+
+	CPLD_WRITE(soft_mux_on, reg4 | CPLD_SW_MUX_BANK_SEL | 1);
+
+	CPLD_WRITE(cfg_rcw_src1, reg5);
+	CPLD_WRITE(cfg_rcw_src2, reg6);
+
+	CPLD_WRITE(vbank, 0);
+
+	CPLD_WRITE(system_rst, 1);
 }
 
 void cpld_set_nand(void)
diff --git a/board/freescale/ls1043ardb/cpld.h b/board/freescale/ls1043ardb/cpld.h
index bd59c0e..cb175b5 100644
--- a/board/freescale/ls1043ardb/cpld.h
+++ b/board/freescale/ls1043ardb/cpld.h
@@ -40,6 +40,7 @@ void cpld_rev_bit(unsigned char *value);
 #define CPLD_SW_MUX_BANK_SEL	0x40
 #define CPLD_BANK_SEL_MASK	0x07
 #define CPLD_BANK_SEL_ALTBANK	0x04
+#define CPLD_CFG_RCW_SRC_NOR	0x025
 #define CPLD_CFG_RCW_SRC_NAND	0x106
 #define CPLD_CFG_RCW_SRC_SD	0x040
 #endif
-- 
2.1.0.27.g96db324