powerpc/85xx: Enable eSDHC boot support on P2020 DS

We implement our own mmc_get_env_addr since the environment variables are
written to just after the u-boot image on SDCard, so we must read the MBR
to get the start address and code length of the u-boot image, then
calculate the address of the env.

Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Zhao Chenhui <b35336@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

board/freescale/common/Makefile

@@ -36,6 +36,7 @@ COBJS-$(CONFIG_FSL_NGPIXIS)	+= ngpixis.o
 COBJS-$(CONFIG_PQ_MDS_PIB)	+= pq-mds-pib.o
 COBJS-$(CONFIG_ID_EEPROM)	+= sys_eeprom.o
 COBJS-$(CONFIG_FSL_SGMII_RISER)	+= sgmii_riser.o
+COBJS-$(CONFIG_ENV_IS_IN_MMC)	+= sdhc_boot.o
 
 COBJS-$(CONFIG_MPC8541CDS)	+= cds_pci_ft.o
 COBJS-$(CONFIG_MPC8548CDS)	+= cds_pci_ft.o

board/freescale/common/sdhc_boot.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2011 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
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <malloc.h>
+
+/*
+ * The environment variables are written to just after the u-boot image
+ * on SDCard, so we must read the MBR to get the start address and code
+ * length of the u-boot image, then calculate the address of the env.
+ */
+#define ESDHC_BOOT_IMAGE_SIZE	0x48
+#define ESDHC_BOOT_IMAGE_ADDR	0x50
+
+int mmc_get_env_addr(struct mmc *mmc, u32 *env_addr)
+{
+	u8 *tmp_buf;
+	u32 blklen, code_offset, code_len, n;
+
+	blklen = mmc->read_bl_len;
+	tmp_buf = malloc(blklen);
+	if (!tmp_buf)
+		return 1;
+
+	/* read out the first block, get the config data information */
+	n = mmc->block_dev.block_read(mmc->block_dev.dev, 0, 1, tmp_buf);
+	if (!n) {
+		free(tmp_buf);
+		return 1;
+	}
+
+	/* Get the Source Address, from offset 0x50 */
+	code_offset = *(u32 *)(tmp_buf + ESDHC_BOOT_IMAGE_ADDR);
+
+	/* Get the code size from offset 0x48 */
+	code_len = *(u32 *)(tmp_buf + ESDHC_BOOT_IMAGE_SIZE);
+
+	*env_addr = code_offset + code_len;
+
+	free(tmp_buf);
+
+	return 0;
+}
+

board/freescale/p2020ds/tlb.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2009 Freescale Semiconductor, Inc.
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -90,6 +90,17 @@ struct fsl_e_tlb_entry tlb_table[] = {
 	SET_TLB_ENTRY(1, PIXIS_BASE, PIXIS_BASE_PHYS,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 8, BOOKE_PAGESZ_4K, 1),
+
+#if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L2_ADDR)
+	/* *I*G - L2SRAM */
+	SET_TLB_ENTRY(1, CONFIG_SYS_INIT_L2_ADDR, CONFIG_SYS_INIT_L2_ADDR_PHYS,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 9, BOOKE_PAGESZ_256K, 1),
+	SET_TLB_ENTRY(1, CONFIG_SYS_INIT_L2_ADDR + 0x40000,
+		      CONFIG_SYS_INIT_L2_ADDR_PHYS + 0x40000,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 10, BOOKE_PAGESZ_256K, 1),
+#endif
 };
 
 int num_tlb_entries = ARRAY_SIZE(tlb_table);

boards.cfg

@@ -534,6 +534,7 @@ P2010RDB_SPIFLASH            powerpc     mpc85xx     p1_p2_rdb           freesca
 P2020DS                      powerpc     mpc85xx     p2020ds             freescale
 P2020DS_36BIT                powerpc     mpc85xx     p2020ds             freescale      -           P2020DS:36BIT
 P2020DS_DDR2                 powerpc     mpc85xx     p2020ds             freescale      -           P2020DS:DDR2
+P2020DS_SDCARD               powerpc     mpc85xx     p2020ds             freescale      -           P2020DS:SDCARD
 P2020RDB                     powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P2020RDB
 P2020RDB_36BIT               powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P2020RDB,36BIT
 P2020RDB_36BIT_SDCARD        powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P2020RDB,36BIT,SDCARD

include/configs/P2020DS.h

@@ -33,6 +33,13 @@
 #define CONFIG_PHYS_64BIT
 #endif
 
+#ifdef CONFIG_SDCARD
+#define CONFIG_SYS_RAMBOOT
+#define CONFIG_SYS_EXTRA_ENV_RELOC
+#define CONFIG_SYS_TEXT_BASE		0xf8f80000
+#define CONFIG_RESET_VECTOR_ADDRESS	0xf8fffffc
+#endif
+
 /* High Level Configuration Options */
 #define CONFIG_BOOKE		1	/* BOOKE */
 #define CONFIG_E500		1	/* BOOKE e500 family */
@@ -93,6 +100,18 @@
 #define CONFIG_PANIC_HANG	/* do not reset board on panic */
 
 /*
+ * Config the L2 Cache
+ */
+#define CONFIG_SYS_INIT_L2_ADDR		0xf8f80000
+#ifdef CONFIG_PHYS_64BIT
+#define CONFIG_SYS_INIT_L2_ADDR_PHYS	0xff8f80000ull
+#else
+#define CONFIG_SYS_INIT_L2_ADDR_PHYS	CONFIG_SYS_INIT_L2_ADDR
+#endif
+#define CONFIG_SYS_L2_SIZE		(512 << 10)
+#define CONFIG_SYS_INIT_L2_END	(CONFIG_SYS_INIT_L2_ADDR + CONFIG_SYS_L2_SIZE)
+
+/*
  * Base addresses -- Note these are effective addresses where the
  * actual resources get mapped (not physical addresses)
  */
@@ -571,6 +590,11 @@
 /*
  * Environment
  */
+#if defined(CONFIG_SDCARD)
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_ENV_SIZE			0x2000
+#define CONFIG_SYS_MMC_ENV_DEV		0
+#else
 #define CONFIG_ENV_IS_IN_FLASH	1
 #if CONFIG_SYS_MONITOR_BASE > 0xfff80000
 #define CONFIG_ENV_ADDR		0xfff80000
@@ -579,6 +603,7 @@
 #endif
 #define CONFIG_ENV_SIZE		0x2000
 #define CONFIG_ENV_SECT_SIZE	0x20000 /* 128K (one sector) */
+#endif
 
 #define CONFIG_LOADS_ECHO	1	/* echo on for serial download */
 #define CONFIG_SYS_LOADS_BAUD_CHANGE	1	/* allow baudrate change */