m68k: add amcore board support

Add Sysam Amcore m68k-based board support.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>

6 files changed, 230 insertions, 0 deletions

diff --git a/board/sysam/amcore/Kconfig b/board/sysam/amcore/Kconfig
new file mode 100644
index 0000000..dd9816e
--- /dev/null
+++ b/board/sysam/amcore/Kconfig
@@ -0,0 +1,22 @@
+if TARGET_AMCORE
+
+config SYS_CPU
+        string
+        default "mcf530x"
+
+config SYS_BOARD
+        string
+        default "amcore"
+
+config SYS_VENDOR
+        string
+        default "sysam"
+
+config SYS_CONFIG_NAME
+        string
+        default "amcore"
+
+endif
+
+
+
diff --git a/board/sysam/amcore/MAINTAINERS b/board/sysam/amcore/MAINTAINERS
new file mode 100644
index 0000000..fe5dd9b
--- /dev/null
+++ b/board/sysam/amcore/MAINTAINERS
@@ -0,0 +1,6 @@
+AMCORE BOARD
+M:	Angelo Dureghello <angelo@sysam.it>
+S:	Maintained
+F:	board/sysam/amcore/
+F:	include/configs/amcore.h
+F:      configs/amcore_defconfig
diff --git a/board/sysam/amcore/Makefile b/board/sysam/amcore/Makefile
new file mode 100644
index 0000000..051186f
--- /dev/null
+++ b/board/sysam/amcore/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2014  Angelo Dureghello <angelo@sysam.it>
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+obj-y	= amcore.o
diff --git a/board/sysam/amcore/amcore.c b/board/sysam/amcore/amcore.c
new file mode 100644
index 0000000..42b7c23
--- /dev/null
+++ b/board/sysam/amcore/amcore.c
@@ -0,0 +1,101 @@
+/*
+ * Board functions for Sysam AMCORE (MCF5307 based) board
+ *
+ * (C) Copyright 2015  Angelo Dureghello <angelo@sysam.it>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ *
+ * This file copies memory testdram() from sandburst/common/sb_common.c
+ */
+
+#include <common.h>
+#include <asm/immap.h>
+#include <asm/io.h>
+
+void init_lcd(void)
+{
+	/* setup for possible K0108 lcd connected on the parallel port */
+	sim_t *sim = (sim_t *)(MMAP_SIM);
+
+	out_be16(&sim->par, 0x300);
+
+	gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
+
+	out_be16(&gpio->paddr, 0xfcff);
+	out_be16(&gpio->padat, 0x0c00);
+}
+
+int checkboard(void)
+{
+	puts("Board: ");
+	puts("AMCORE v.001(alpha)\n");
+
+	init_lcd();
+
+	return 0;
+}
+
+/*
+ * in initdram we are here executing from flash
+ * case 1:
+ * is with no ACR/flash cache enabled
+ * nop = 40ns (scope measured)
+ */
+void fudelay(int usec)
+{
+	while (usec--)
+		asm volatile ("nop");
+}
+
+phys_size_t initdram(int board_type)
+{
+	u32 dramsize, RC;
+
+	sdramctrl_t *dc = (sdramctrl_t *)(MMAP_DRAMC);
+
+	/*
+	 * SDRAM  MT48LC4M32B2 details
+	 * Memory block 0: 16 MB of SDRAM at address $00000000
+	 * Port size: 32-bit port
+	 *
+	 * Memory block 0 wired as follows:
+	 * CPU   : A15 A14 A13 A12 A11 A10 A9 A17 A18 A19 A20 A21 A22 A23
+	 * SDRAM :  A0  A1  A2  A3  A4  A5  A6 A7  A8  A9 A10 A11 BA0 BA1
+	 *
+	 * Ensure that there is a delay of at least 100 microseconds from
+	 * processor reset to the following code so that the SDRAM is ready
+	 * for commands.
+	 */
+	fudelay(100);
+
+	/*
+	 * DCR
+	 * set proper  RC as per specification
+	 */
+	RC = (CONFIG_SYS_CPU_CLK / 1000000) >> 1;
+	RC = (RC * 15) >> 4;
+
+	/* 0x8000 is the faster option */
+	out_be16(&dc->dcr, 0x8200 | RC);
+
+	/*
+	 * DACR0, page mode continuous, CMD on A20 0x0300
+	 */
+	out_be32(&dc->dacr0, 0x00003304);
+
+	dramsize = ((CONFIG_SYS_SDRAM_SIZE)-1) & 0xfffc0000;
+	out_be32(&dc->dmr0,  dramsize|1);
+
+	/* issue a PRECHARGE ALL */
+	out_be32(&dc->dacr0, 0x0000330c);
+	out_be32((u32 *)0x00000004, 0xbeaddeed);
+	/* issue AUTOREFRESH */
+	out_be32(&dc->dacr0, 0x0000b304);
+	/* let refresh occour */
+	fudelay(1);
+
+	out_be32(&dc->dacr0, 0x0000b344);
+	out_be32((u32 *)0x00000c00, 0xbeaddeed);
+
+	return get_ram_size(CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_SDRAM_SIZE);
+}
diff --git a/board/sysam/amcore/config.mk b/board/sysam/amcore/config.mk
new file mode 100644
index 0000000..d01a8bb
--- /dev/null
+++ b/board/sysam/amcore/config.mk
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2014  Angelo Dureghello <angelo@sysam.it>
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+CONFIG_SYS_TEXT_BASE = 0xffc00000
diff --git a/board/sysam/amcore/u-boot.lds b/board/sysam/amcore/u-boot.lds
new file mode 100644
index 0000000..2f7a241
--- /dev/null
+++ b/board/sysam/amcore/u-boot.lds
@@ -0,0 +1,87 @@
+/*
+ * Linker script for Sysam AMCORE board
+ *
+ * (C) Copyright 2014  Angelo Dureghello <angelo@sysam.it>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+OUTPUT_ARCH(m68k)
+
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  .text      :
+  {
+    arch/m68k/cpu/mcf530x/start.o		(.text)
+
+    . = DEFINED(env_offset) ? env_offset : .;
+    common/env_embedded.o	(.text)
+
+    *(.text)
+  }
+  _etext = .;
+  PROVIDE (etext = .);
+  .rodata    :
+  {
+    *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
+  }
+
+  /* Read-write section, merged into data segment: */
+  . = (. + 0x00FF) & 0xFFFFFF00;
+  _erotext = .;
+  PROVIDE (erotext = .);
+
+  .reloc   :
+  {
+    __got_start = .;
+    KEEP(*(.got))
+    __got_end = .;
+    _GOT2_TABLE_ = .;
+    KEEP(*(.got2))
+    _FIXUP_TABLE_ = .;
+    KEEP(*(.fixup))
+  }
+  __got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >>2;
+  __fixup_entries = (. - _FIXUP_TABLE_)>>2;
+
+  .data    :
+  {
+    *(.data)
+    *(.sdata)
+  }
+  _edata  =  .;
+  PROVIDE (edata = .);
+
+  . = .;
+
+  . = ALIGN(4);
+  .u_boot_list : {
+	KEEP(*(SORT(.u_boot_list*)));
+  }
+
+  . = .;
+  __start___ex_table = .;
+  __ex_table : { *(__ex_table) }
+  __stop___ex_table = .;
+
+  . = ALIGN(256);
+  __init_begin = .;
+  .text.init : { *(.text.init) }
+  .data.init : { *(.data.init) }
+  . = ALIGN(256);
+  __init_end = .;
+
+  __bss_start = .;
+  .bss (NOLOAD)       :
+  {
+   _sbss = .;
+   *(.sbss*)
+   *(.bss*)
+   *(COMMON)
+   . = ALIGN(4);
+   _ebss = .;
+  }
+  __bss_end = . ;
+  PROVIDE (end = .);
+}