mx31: provide readable WEIM CS accessor

setup_weimcs() and some macros are added to support the setup
for i.MX31 WEIM chip selects. As a compromise between verbosity
and readability an ASCII-art'ish bit comment is used instead of
bitfields.
All i.MX31 boards have been patched to use this approach using a
helper program to verify the changes.

Signed-off-by: Helmut Raiger <helmut.raiger@hale.at>
Acked-by: Stefano Babic <sbabic@denx.de>

1 files changed, 33 insertions, 53 deletions

diff --git a/board/davedenx/qong/qong.c b/board/davedenx/qong/qong.c
index 99432ed..9fca1f8 100644
--- a/board/davedenx/qong/qong.c
+++ b/board/davedenx/qong/qong.c
@@ -25,6 +25,7 @@
 #include <netdev.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
 #include <asm/io.h>
 #include <nand.h>
 #include <fsl_pmic.h>
@@ -61,11 +62,17 @@ static void qong_fpga_reset(void)
 int board_early_init_f (void)
 {
 #ifdef CONFIG_QONG_FPGA
-	/* CS1: FPGA/Network Controller/GPIO */
-	/* 16-bit, no DTACK */
-	__REG(CSCR_U(1)) = 0x00000A01;
-	__REG(CSCR_L(1)) = 0x20040501;
-	__REG(CSCR_A(1)) = 0x04020C00;
+	/* CS1: FPGA/Network Controller/GPIO, 16-bit, no DTACK */
+	static const struct mxc_weimcs cs1 = {
+		/*    sp wp bcd bcs psz pme sync dol cnc wsc ew wws edc */
+		CSCR_U(0, 0,  0,  0,  0,  0,   0,  0,  0, 10, 0,  0,  1),
+		/*   oea oen ebwa ebwn csa ebc dsz csn psr cre wrap csen */
+		CSCR_L(2,  0,   0,   4,  0,  0,  5,  0,  0,  0,   0,   1),
+		/*  ebra ebrn rwa rwn mum lah lbn lba dww dct wwu age cnc2 fce*/
+		CSCR_A(0,   4,  0,  2,  0,  0,  3,  0,  0,  0,  0,  0,   0,  0)
+	};
+
+	mxc_setup_weimcs(1, &cs1);
 
 	/* setup pins for FPGA */
 	mx31_gpio_mux(IOMUX_MODE(0x76, MUX_CTL_GPIO));
@@ -146,50 +153,16 @@ int board_init (void)
 	/* Chip selects */
 	/* CS0: Nor Flash #0 - it must be init'ed when executing from DDR */
 	/* Assumptions: HCLK = 133 MHz, tACC = 130ns */
-	__REG(CSCR_U(0)) = ((0 << 31)	| /* SP */
-						(0 << 30)	| /* WP */
-						(0 << 28)	| /* BCD */
-						(0 << 24)	| /* BCS */
-						(0 << 22)	| /* PSZ */
-						(0 << 21)	| /* PME */
-						(0 << 20)	| /* SYNC */
-						(0 << 16)	| /* DOL */
-						(3 << 14)	| /* CNC */
-						(21 << 8)	| /* WSC */
-						(0 << 7)	| /* EW */
-						(0 << 4)	| /* WWS */
-						(6 << 0)	  /* EDC */
-					   );
-
-	__REG(CSCR_L(0)) = ((2 << 28)	| /* OEA */
-						(1 << 24)	| /* OEN */
-						(3 << 20)	| /* EBWA */
-						(3 << 16)	| /* EBWN */
-						(1 << 12)	| /* CSA */
-						(1 << 11)	| /* EBC */
-						(5 << 8)	| /* DSZ */
-						(1 << 4)	| /* CSN */
-						(0 << 3)	| /* PSR */
-						(0 << 2)	| /* CRE */
-						(0 << 1)	| /* WRAP */
-						(1 << 0)	  /* CSEN */
-					   );
-
-	__REG(CSCR_A(0)) = ((2 << 28)	| /* EBRA */
-						(1 << 24)	| /* EBRN */
-						(2 << 20)	| /* RWA */
-						(2 << 16)	| /* RWN */
-						(0 << 15)	| /* MUM */
-						(0 << 13)	| /* LAH */
-						(2 << 10)	| /* LBN */
-						(0 << 8)	| /* LBA */
-						(0 << 6)	| /* DWW */
-						(0 << 4)	| /* DCT */
-						(0 << 3)	| /* WWU */
-						(0 << 2)	| /* AGE */
-						(0 << 1)	| /* CNC2 */
-						(0 << 0)	  /* FCE */
-					   );
+	static const struct mxc_weimcs cs0 = {
+		/*     sp wp bcd bcs psz pme sync dol cnc wsc ew wws edc */
+		CSCR_U(0, 0,  0,  0,  0,  0,   0,  0,  3, 21, 0,  0,  6),
+		/*   oea oen ebwa ebwn csa ebc dsz csn psr cre wrap csen */
+		CSCR_L(0,  1,   3,   3,  1,  1,  5,  1,  0,  0,   0,  1),
+		/*  ebra ebrn rwa rwn mum lah lbn lba dww dct wwu age cnc2 fce*/
+		CSCR_A(0,   1,  2,  2,  0,  0,  2,  0,  0,  0,  0,  0,   0,  0)
+	};
+
+	mxc_setup_weimcs(0, &cs0);
 
 	/* board id for linux */
 	gd->bd->bi_arch_number = MACH_TYPE_QONG;
@@ -247,11 +220,18 @@ int board_eth_init(bd_t *bis)
 #if defined(CONFIG_QONG_FPGA) && defined(CONFIG_NAND_PLAT)
 static void board_nand_setup(void)
 {
-
 	/* CS3: NAND 8-bit */
-	__REG(CSCR_U(3)) = 0x00004f00;
-	__REG(CSCR_L(3)) = 0x20013b31;
-	__REG(CSCR_A(3)) = 0x00020800;
+	static const struct mxc_weimcs cs3 = {
+		/*    sp wp bcd bcs psz pme sync dol cnc wsc ew wws edc */
+		CSCR_U(0, 0,  0,  0,  0,  0,   0,  0,  1, 15, 0,  0,  0),
+		/*   oea oen ebwa ebwn csa ebc dsz csn psr cre wrap csen */
+		CSCR_L(2,  0,   0,   1,  3,  1,  3,  3,  0,  0,   0,   1),
+		/*  ebra ebrn rwa rwn mum lah lbn lba dww dct wwu age cnc2 fce*/
+		CSCR_A(0,   0,  0,  2,  0,  0,  2,  0,  0,  0,  0,  0,  0,   0)
+	};
+
+	mxc_setup_weimcs(3, &cs3);
+
 	__REG(IOMUXC_GPR) |= 1 << 13;
 
 	mx31_gpio_mux(IOMUX_MODE(MUX_CTL_NFC_WP, MUX_CTL_IN_GPIO));