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>
diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index 1abd3e5..8ea5acb 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -36,6 +36,7 @@
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
diff --git a/board/freescale/common/sdhc_boot.c b/board/freescale/common/sdhc_boot.c
new file mode 100644
index 0000000..964c6b8
--- /dev/null
+++ b/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;
+}
+
diff --git a/board/freescale/p2020ds/tlb.c b/board/freescale/p2020ds/tlb.c
index 824b3b2..fd914a1 100644
--- a/board/freescale/p2020ds/tlb.c
+++ b/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 @@
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);