SPL: Move the omap SPL framework to common/spl

Add a new flag, CONFIG_SPL_FRAMEWORK to opt into the common/spl SPL
framework, enable on all of the previously using boards.  We move the
spl_ymodem.c portion to common/ and spl_mmc.c to drivers/mmc/.  We leave
the NAND one in-place as we plan to replace it later in this series.

We use common/spl to avoid linker problems with respect to merging
constant strings in objects.   Otherwise all strings in common/ will be
linked in and kept which grows SPL in size too much.

Signed-off-by: Tom Rini <trini@ti.com>

3 files changed, 336 insertions, 0 deletions

diff --git a/common/spl/Makefile b/common/spl/Makefile
new file mode 100644
index 0000000..b61b438
--- /dev/null
+++ b/common/spl/Makefile
@@ -0,0 +1,37 @@
+#
+# (C) Copyright 2012
+# Texas Instruments Incorporated - http://www.ti.com/
+# Aneesh V <aneesh@ti.com>
+#
+# This file is released under the terms of GPL v2 and any later version.
+# See the file COPYING in the root directory of the source tree for details.
+#
+# Based on common/Makefile.
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)libspl.o
+
+ifdef CONFIG_SPL_BUILD
+COBJS-$(CONFIG_SPL_FRAMEWORK) += spl.o
+COBJS-$(CONFIG_SPL_YMODEM_SUPPORT) += spl_ymodem.o
+endif
+
+COBJS	:= $(sort $(COBJS-y))
+SRCS	:= $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS-y))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/common/spl/spl.c b/common/spl/spl.c
new file mode 100644
index 0000000..1562f2a
--- /dev/null
+++ b/common/spl/spl.c
@@ -0,0 +1,224 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Aneesh V <aneesh@ti.com>
+ *
+ * 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 <spl.h>
+#include <asm/u-boot.h>
+#include <nand.h>
+#include <fat.h>
+#include <version.h>
+#include <i2c.h>
+#include <image.h>
+#include <malloc.h>
+#include <linux/compiler.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+u32 *boot_params_ptr = NULL;
+struct spl_image_info spl_image;
+
+/* Define global data structure pointer to it*/
+static gd_t gdata __attribute__ ((section(".data")));
+static bd_t bdata __attribute__ ((section(".data")));
+
+inline void hang(void)
+{
+	puts("### ERROR ### Please RESET the board ###\n");
+	for (;;)
+		;
+}
+
+void board_init_f(ulong dummy)
+{
+	/*
+	 * We call relocate_code() with relocation target same as the
+	 * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
+	 * skipped. Instead, only .bss initialization will happen. That's
+	 * all we need
+	 */
+	debug(">>board_init_f()\n");
+	relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
+}
+
+/*
+ * Default function to determine if u-boot or the OS should
+ * be started. This implementation always returns 1.
+ *
+ * Please implement your own board specific funcion to do this.
+ *
+ * RETURN
+ * 0 to not start u-boot
+ * positive if u-boot should start
+ */
+#ifdef CONFIG_SPL_OS_BOOT
+__weak int spl_start_uboot(void)
+{
+	puts("SPL: Please implement spl_start_uboot() for your board\n");
+	puts("SPL: Direct Linux boot not active!\n");
+	return 1;
+}
+#endif
+
+void spl_parse_image_header(const struct image_header *header)
+{
+	u32 header_size = sizeof(struct image_header);
+
+	if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
+		spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
+		spl_image.entry_point = __be32_to_cpu(header->ih_load);
+		/* Load including the header */
+		spl_image.load_addr = spl_image.entry_point - header_size;
+		spl_image.os = header->ih_os;
+		spl_image.name = (const char *)&header->ih_name;
+		debug("spl: payload image: %s load addr: 0x%x size: %d\n",
+			spl_image.name, spl_image.load_addr, spl_image.size);
+	} else {
+		/* Signature not found - assume u-boot.bin */
+		puts("mkimage signature not found, assuming u-boot.bin ..\n");
+		debug("mkimage signature not found - ih_magic = %x\n",
+			header->ih_magic);
+		/* Let's assume U-Boot will not be more than 200 KB */
+		spl_image.size = 200 * 1024;
+		spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
+		spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
+		spl_image.os = IH_OS_U_BOOT;
+		spl_image.name = "U-Boot";
+	}
+}
+
+/*
+ * This function jumps to an image with argument. Normally an FDT or ATAGS
+ * image.
+ * arg: Pointer to paramter image in RAM
+ */
+#ifdef CONFIG_SPL_OS_BOOT
+static void __noreturn jump_to_image_linux(void *arg)
+{
+	debug("Entering kernel arg pointer: 0x%p\n", arg);
+	typedef void (*image_entry_arg_t)(int, int, void *)
+		__attribute__ ((noreturn));
+	image_entry_arg_t image_entry =
+		(image_entry_arg_t) spl_image.entry_point;
+	cleanup_before_linux();
+	image_entry(0, CONFIG_MACH_TYPE, arg);
+}
+#endif
+
+static void __noreturn jump_to_image_no_args(void)
+{
+	typedef void __noreturn (*image_entry_noargs_t)(u32 *);
+	image_entry_noargs_t image_entry =
+			(image_entry_noargs_t) spl_image.entry_point;
+
+	debug("image entry point: 0x%X\n", spl_image.entry_point);
+	/* Pass the saved boot_params from rom code */
+#if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
+	image_entry = (image_entry_noargs_t)0x80100000;
+#endif
+	u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
+	image_entry((u32 *)boot_params_ptr_addr);
+}
+
+void board_init_r(gd_t *id, ulong dummy)
+{
+	u32 boot_device;
+	debug(">>spl:board_init_r()\n");
+
+#ifdef CONFIG_SYS_SPL_MALLOC_START
+	mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
+			CONFIG_SYS_SPL_MALLOC_SIZE);
+#endif
+
+#ifdef CONFIG_SPL_BOARD_INIT
+	spl_board_init();
+#endif
+
+	boot_device = spl_boot_device();
+	debug("boot device - %d\n", boot_device);
+	switch (boot_device) {
+#ifdef CONFIG_SPL_MMC_SUPPORT
+	case BOOT_DEVICE_MMC1:
+	case BOOT_DEVICE_MMC2:
+	case BOOT_DEVICE_MMC2_2:
+		spl_mmc_load_image();
+		break;
+#endif
+#ifdef CONFIG_SPL_NAND_SUPPORT
+	case BOOT_DEVICE_NAND:
+		spl_nand_load_image();
+		break;
+#endif
+#ifdef CONFIG_SPL_YMODEM_SUPPORT
+	case BOOT_DEVICE_UART:
+		spl_ymodem_load_image();
+		break;
+#endif
+#ifdef CONFIG_SPL_SPI_SUPPORT
+	case BOOT_DEVICE_SPI:
+		spi_boot();
+	break;
+#endif
+	default:
+		puts("SPL: Un-supported Boot Device\n");
+		debug("Found: %d\n", boot_device);
+		hang();
+		break;
+	}
+
+	switch (spl_image.os) {
+	case IH_OS_U_BOOT:
+		debug("Jumping to U-Boot\n");
+		jump_to_image_no_args();
+		break;
+#ifdef CONFIG_SPL_OS_BOOT
+	case IH_OS_LINUX:
+		debug("Jumping to Linux\n");
+		spl_board_prepare_for_linux();
+		jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
+		break;
+#endif
+	default:
+		puts("Unsupported OS image.. Jumping nevertheless..\n");
+		jump_to_image_no_args();
+	}
+}
+
+/* This requires UART clocks to be enabled */
+void preloader_console_init(void)
+{
+	gd = &gdata;
+	gd->bd = &bdata;
+	gd->flags |= GD_FLG_RELOC;
+	gd->baudrate = CONFIG_BAUDRATE;
+
+	serial_init();		/* serial communications setup */
+
+	gd->have_console = 1;
+
+	puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
+			U_BOOT_TIME ")\n");
+#ifdef CONFIG_SPL_DISPLAY_PRINT
+	spl_display_print();
+#endif
+}
diff --git a/common/spl/spl_ymodem.c b/common/spl/spl_ymodem.c
new file mode 100644
index 0000000..40e5035
--- /dev/null
+++ b/common/spl/spl_ymodem.c
@@ -0,0 +1,75 @@
+/*
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2011
+ * Texas Instruments, <www.ti.com>
+ *
+ * Matt Porter <mporter@ti.com>
+ *
+ * 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 <spl.h>
+#include <xyzModem.h>
+#include <asm/u-boot.h>
+#include <asm/utils.h>
+
+#define BUF_SIZE 1024
+
+static int getcymodem(void) {
+	if (tstc())
+		return (getc());
+	return -1;
+}
+
+void spl_ymodem_load_image(void)
+{
+	int size = 0;
+	int err;
+	int res;
+	int ret;
+	connection_info_t info;
+	char buf[BUF_SIZE];
+	ulong store_addr = ~0;
+	ulong addr = 0;
+
+	info.mode = xyzModem_ymodem;
+	ret = xyzModem_stream_open(&info, &err);
+
+	if (!ret) {
+		while ((res =
+			xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) {
+			if (addr == 0)
+				spl_parse_image_header((struct image_header *)buf);
+			store_addr = addr + spl_image.load_addr;
+			size += res;
+			addr += res;
+			memcpy((char *)(store_addr), buf, res);
+		}
+	} else {
+		printf("spl: ymodem err - %s\n", xyzModem_error(err));
+		hang();
+	}
+
+	xyzModem_stream_close(&err);
+	xyzModem_stream_terminate(false, &getcymodem);
+
+	printf("Loaded %d bytes\n", size);
+}