mpc85xx: Adding more registers and options

This patch exposes more registers which can be used by the DDR drivers or
interactive debugging. U-boot doesn't use all the registers in DDRC.
When advanced tuning is required, writing to those registers is needed.

Add writing to cdr1, cdr2, err_disable, err_int_en and debug registers
Add options to override rcw, address parity to RDIMMs.
Use array for debug registers.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc85xx/ddr-gen3.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008 Freescale Semiconductor, Inc.
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -9,6 +9,7 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/fsl_ddr_sdram.h>
+#include <asm/processor.h>
 
 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
 #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
@@ -79,6 +80,12 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
 	out_be32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr);
 	out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
 	out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
+	out_be32(&ddr->ddr_cdr1, regs->ddr_cdr1);
+	out_be32(&ddr->ddr_cdr2, regs->ddr_cdr2);
+	out_be32(&ddr->err_disable, regs->err_disable);
+	out_be32(&ddr->err_int_en, regs->err_int_en);
+	for (i = 0; i < 32; i++)
+		out_be32(&ddr->debug[i], regs->debug[i]);
 
 	/* Set, but do not enable the memory */
 	temp_sdram_cfg = regs->ddr_sdram_cfg;
@@ -93,8 +100,7 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
 	if ((((in_be32(&ddr->sdram_cfg) >> 24) & 0x7) == SDRAM_TYPE_DDR2)
 	    && in_be32(&ddr->sdram_cfg) & 0x80000) {
 		/* set DEBUG_1[31] */
-		u32 temp = in_be32(&ddr->debug_1);
-		out_be32(&ddr->debug_1, temp | 1);
+		setbits_be32(&ddr->debug[0], 1);
 	}
 #endif
 

arch/powerpc/include/asm/fsl_ddr_sdram.h

@@ -120,6 +120,11 @@ typedef struct fsl_ddr_cfg_regs_s {
 	unsigned int ddr_sdram_rcw_1;
 	unsigned int ddr_sdram_rcw_2;
 	unsigned int ddr_eor;
+	unsigned int ddr_cdr1;
+	unsigned int ddr_cdr2;
+	unsigned int err_disable;
+	unsigned int err_int_en;
+	unsigned int debug[32];
 } fsl_ddr_cfg_regs_t;
 
 typedef struct memctl_options_partial_s {
@@ -175,6 +180,7 @@ typedef struct memctl_options_s {
 	/* mirrior DIMMs for DDR3 */
 	unsigned int mirrored_dimm;
 	unsigned int quad_rank_present;
+	unsigned int ap_en;	/* address parity enable for RDIMM */
 
 	/* Global Timing Parameters */
 	unsigned int cas_latency_override;
@@ -210,6 +216,12 @@ typedef struct memctl_options_s {
 	unsigned int zq_en;
 	/* Write leveling */
 	unsigned int wrlvl_en;
+	/* RCW override for RDIMM */
+	unsigned int rcw_override;
+	unsigned int rcw_1;
+	unsigned int rcw_2;
+	/* control register 1 */
+	unsigned int ddr_cdr1;
 } memctl_options_t;
 
 extern phys_size_t fsl_ddr_sdram(void);

arch/powerpc/include/asm/immap_85xx.h

@@ -222,25 +222,8 @@ typedef struct ccsr_ddr {
 	u32	capture_ext_address;	/* Error Extended Addr Capture */
 	u32	err_sbe;		/* Single-Bit ECC Error Management */
 	u8	res11[164];
-	u32	debug_1;
-	u32	debug_2;
-	u32	debug_3;
-	u32	debug_4;
-	u32	debug_5;
-	u32	debug_6;
-	u32	debug_7;
-	u32	debug_8;
-	u32	debug_9;
-	u32	debug_10;
-	u32	debug_11;
-	u32	debug_12;
-	u32	debug_13;
-	u32	debug_14;
-	u32	debug_15;
-	u32	debug_16;
-	u32	debug_17;
-	u32	debug_18;
-	u8	res12[184];
+	u32	debug[32];		/* debug_1 to debug_32 */
+	u8	res12[128];
 } ccsr_ddr_t;
 
 #define DDR_EOR_RD_BDW_OPT_DIS	0x80000000 /* Read BDW Opt. disable */

board/tqc/tqm85xx/sdram.c

@@ -240,7 +240,7 @@ static phys_size_t sdram_setup(int casl)
 	 * 4. Before DDR_SDRAM_CFG[MEM_EN] set, write D3[21] to disable data
 	 *    training
 	 */
-	ddr->debug_3 |= 0x00000400;
+	ddr->debug[2] |= 0x00000400;
 
 	/*
 	 * 5. Wait 200 micro-seconds
@@ -282,18 +282,18 @@ static phys_size_t sdram_setup(int casl)
 	/*
 	 * 8. Clear D3[21] to re-enable data training
 	 */
-	ddr->debug_3 &= ~0x00000400;
+	ddr->debug[2] &= ~0x00000400;
 
 	/*
 	 * 9. Set D2(21) to force data training to run
 	 */
-	ddr->debug_2 |= 0x00000400;
+	ddr->debug[1] |= 0x00000400;
 
 	/*
 	 * 10. Poll on D2[21] until it is cleared by hardware
 	 */
 	asm ("sync;isync;msync");
-	while (ddr->debug_2 & 0x00000400)
+	while (ddr->debug[1] & 0x00000400)
 		asm ("eieio");
 
 	/*