EXYNOS: SMDK5250: Add MMC SPL support

This patch adds support for MMC SPL booting.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

Makefile

@@ -735,6 +735,7 @@ clean:
 	       $(obj)tools/gdb/{astest,gdbcont,gdbsend}			  \
 	       $(obj)tools/gen_eth_addr    $(obj)tools/img2srec		  \
 	       $(obj)tools/mk{env,}image   $(obj)tools/mpc86x_clk	  \
+	       $(obj)tools/mk{smdk5250,}spl				  \
 	       $(obj)tools/ncb		   $(obj)tools/ubsha1
 	@rm -f $(obj)board/cray/L1/{bootscript.c,bootscript.image}	  \
 	       $(obj)board/matrix_vision/*/bootscript.img		  \

board/samsung/smdk5250/Makefile

@@ -29,7 +29,14 @@ SOBJS	:= lowlevel_init.o
 COBJS	:= clock_init.o
 COBJS	+= dmc_init.o
 COBJS	+= tzpc_init.o
+
+ifndef CONFIG_SPL_BUILD
 COBJS	+= smdk5250.o
+endif
+
+ifdef CONFIG_SPL_BUILD
+COBJS	+= mmc_boot.o
+endif
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))

board/samsung/smdk5250/mmc_boot.c

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * 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<config.h>
+
+/*
+* Copy U-boot from mmc to RAM:
+* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
+* Pointer to API (Data transfer from mmc to ram)
+*/
+void copy_uboot_to_ram(void)
+{
+	u32 (*copy_bl2)(u32, u32, u32) = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR;
+
+	copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
+}
+
+void board_init_f(unsigned long bootflag)
+{
+	__attribute__((noreturn)) void (*uboot)(void);
+	copy_uboot_to_ram();
+
+	/* Jump to U-Boot image */
+	uboot = (void *)CONFIG_SYS_TEXT_BASE;
+	(*uboot)();
+	/* Never returns Here */
+}
+
+/* Place Holders */
+void board_init_r(gd_t *id, ulong dest_addr)
+{
+	/* Function attribute is no-return */
+	/* This Function never executes */
+	while (1)
+		;
+}
+
+void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}

include/configs/smdk5250.h

@@ -102,6 +102,10 @@
 #define CONFIG_BOOTDELAY		3
 #define CONFIG_ZERO_BOOTDELAY_CHECK
 
+/* MMC SPL */
+#define CONFIG_SPL
+#define COPY_BL2_FNPTR_ADDR	0x02020030
+
 #define CONFIG_BOOTCOMMAND	"mmc read 40007000 451 2000; bootm 40007000"
 
 /* Miscellaneous configurable options */
@@ -178,6 +182,9 @@
 #define CONFIG_BL2_OFFSET	(CONFIG_BL1_OFFSET + CONFIG_BL1_SIZE)
 #define CONFIG_ENV_OFFSET	(CONFIG_BL2_OFFSET + CONFIG_BL2_SIZE)
 
+/* U-boot copy size from boot Media to DRAM.*/
+#define BL2_START_OFFSET	(CONFIG_BL2_OFFSET/512)
+#define BL2_SIZE_BLOC_COUNT	(CONFIG_BL2_SIZE/512)
 #define CONFIG_DOS_PARTITION
 
 #define CONFIG_IRAM_STACK	0x02050000

tools/Makefile

@@ -68,6 +68,7 @@ BIN_FILES-$(CONFIG_CMD_LOADS) += img2srec$(SFX)
 BIN_FILES-$(CONFIG_XWAY_SWAP_BYTES) += xway-swap-bytes$(SFX)
 BIN_FILES-y += mkenvimage$(SFX)
 BIN_FILES-y += mkimage$(SFX)
+BIN_FILES-$(CONFIG_SMDK5250) += mksmdk5250spl$(SFX)
 BIN_FILES-$(CONFIG_MX28) += mxsboot$(SFX)
 BIN_FILES-$(CONFIG_NETCONSOLE) += ncb$(SFX)
 BIN_FILES-$(CONFIG_SHA1_CHECK_UB_IMG) += ubsha1$(SFX)
@@ -94,6 +95,7 @@ NOPED_OBJ_FILES-y += imximage.o
 NOPED_OBJ_FILES-y += omapimage.o
 NOPED_OBJ_FILES-y += mkenvimage.o
 NOPED_OBJ_FILES-y += mkimage.o
+OBJ_FILES-$(CONFIG_SMDK5250) += mkexynosspl.o
 OBJ_FILES-$(CONFIG_MX28) += mxsboot.o
 OBJ_FILES-$(CONFIG_NETCONSOLE) += ncb.o
 NOPED_OBJ_FILES-y += os_support.o
@@ -213,6 +215,10 @@ $(obj)mkimage$(SFX):	$(obj)aisimage.o \
 	$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^
 	$(HOSTSTRIP) $@
 
+$(obj)mk$(BOARD)spl$(SFX):	$(obj)mkexynosspl.o
+	$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^
+	$(HOSTSTRIP) $@
+
 $(obj)mpc86x_clk$(SFX):	$(obj)mpc86x_clk.o
 	$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^
 	$(HOSTSTRIP) $@

tools/mkexynosspl.c

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <compiler.h>
+
+#define CHECKSUM_OFFSET		(14*1024-4)
+#define BUFSIZE			(14*1024)
+#define FILE_PERM		(S_IRUSR | S_IWUSR | S_IRGRP \
+				| S_IWGRP | S_IROTH | S_IWOTH)
+/*
+* Requirement:
+* IROM code reads first 14K bytes from boot device.
+* It then calculates the checksum of 14K-4 bytes and compare with data at
+* 14K-4 offset.
+*
+* This function takes two filenames:
+* IN  "u-boot-spl.bin" and
+* OUT "$(BOARD)-spl.bin as filenames.
+* It reads the "u-boot-spl.bin" in 16K buffer.
+* It calculates checksum of 14K-4 Bytes and stores at 14K-4 offset in buffer.
+* It writes the buffer to "$(BOARD)-spl.bin" file.
+*/
+
+int main(int argc, char **argv)
+{
+	unsigned char buffer[BUFSIZE];
+	int i, ifd, ofd;
+	uint32_t checksum = 0;
+	off_t	len;
+	ssize_t count;
+	struct stat stat;
+
+	if (argc != 3) {
+		fprintf(stderr, "Usage: %s <infile> <outfile>\n", argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	ifd = open(argv[1], O_RDONLY);
+	if (ifd < 0) {
+		fprintf(stderr, "%s: Can't open %s: %s\n",
+			argv[0], argv[1], strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	ofd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, FILE_PERM);
+	if (ifd < 0) {
+		fprintf(stderr, "%s: Can't open %s: %s\n",
+			argv[0], argv[2], strerror(errno));
+		close(ifd);
+		exit(EXIT_FAILURE);
+	}
+
+	if (fstat(ifd, &stat)) {
+		fprintf(stderr, "%s: Unable to get size of %s: %s\n",
+			argv[0], argv[1], strerror(errno));
+		close(ifd);
+		close(ofd);
+		exit(EXIT_FAILURE);
+	}
+
+	len = stat.st_size;
+
+	count = (len < CHECKSUM_OFFSET) ? len : CHECKSUM_OFFSET;
+
+	if (read(ifd, buffer, count) != count) {
+		fprintf(stderr, "%s: Can't read %s: %s\n",
+			argv[0], argv[1], strerror(errno));
+
+		close(ifd);
+		close(ofd);
+
+		exit(EXIT_FAILURE);
+	}
+
+	for (i = 0, checksum = 0; i < CHECKSUM_OFFSET; i++)
+		checksum += buffer[i];
+
+	checksum = cpu_to_le32(checksum);
+
+	memcpy(&buffer[CHECKSUM_OFFSET], &checksum, sizeof(checksum));
+
+	if (write(ofd, buffer, BUFSIZE) != BUFSIZE) {
+		fprintf(stderr, "%s: Can't write %s: %s\n",
+			argv[0], argv[2], strerror(errno));
+
+		close(ifd);
+		close(ofd);
+
+		exit(EXIT_FAILURE);
+	}
+
+	close(ifd);
+	close(ofd);
+
+	return EXIT_SUCCESS;
+}