ColdFire: Add SBF support for M52277EVB

Add serial boot support

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>

4 files changed, 161 insertions, 5 deletions

diff --git a/board/freescale/m52277evb/config.mk b/board/freescale/m52277evb/config.mk
index ce014ed..b42fcc9 100644
--- a/board/freescale/m52277evb/config.mk
+++ b/board/freescale/m52277evb/config.mk
@@ -22,4 +22,6 @@
 # MA 02111-1307 USA
 #
 
-TEXT_BASE = 0
+sinclude $(OBJTREE)/board/$(BOARDDIR)/config.tmp
+
+PLATFORM_CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
diff --git a/board/freescale/m52277evb/m52277evb.c b/board/freescale/m52277evb/m52277evb.c
index 838a6de..9109edb 100644
--- a/board/freescale/m52277evb/m52277evb.c
+++ b/board/freescale/m52277evb/m52277evb.c
@@ -38,8 +38,18 @@ int checkboard(void)
 
 phys_size_t initdram(int board_type)
 {
+	u32 dramsize;
+
+#ifdef CONFIG_CF_SBF
+	/*
+	 * Serial Boot: The dram is already initialized in start.S
+	 * only require to return DRAM size
+	 */
+	dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
+#else
 	volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
-	u32 dramsize, i;
+	volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
+	u32 i;
 
 	dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
 
@@ -49,6 +59,8 @@ phys_size_t initdram(int board_type)
 	}
 	i--;
 
+	gpio->mscr_sdram = CONFIG_SYS_SDRAM_DRV_STRENGTH;
+
 	sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i);
 
 	sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1;
@@ -56,24 +68,30 @@ phys_size_t initdram(int board_type)
 
 	/* Issue PALL */
 	sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2;
+	__asm__("nop");
 
 	/* Issue LEMR */
-	/*sdram->sdmr = CONFIG_SYS_SDRAM_EMOD; */
 	sdram->sdmr = CONFIG_SYS_SDRAM_MODE;
+	__asm__("nop");
+	sdram->sdmr = CONFIG_SYS_SDRAM_EMOD;
+	__asm__("nop");
 
 	udelay(1000);
 
 	/* Issue PALL */
 	sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2;
+	__asm__("nop");
 
 	/* Perform two refresh cycles */
 	sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
+	__asm__("nop");
 	sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
+	__asm__("nop");
 
-	sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00;
+	sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000C00;
 
 	udelay(100);
-
+#endif
 	return (dramsize);
 };
 
diff --git a/board/freescale/m52277evb/u-boot.lds b/board/freescale/m52277evb/u-boot.spa
index 7ae70d4..7ae70d4 100644
--- a/board/freescale/m52277evb/u-boot.lds
+++ b/board/freescale/m52277evb/u-boot.spa
diff --git a/board/freescale/m52277evb/u-boot.stm b/board/freescale/m52277evb/u-boot.stm
new file mode 100644
index 0000000..03ff532
--- /dev/null
+++ b/board/freescale/m52277evb/u-boot.stm
@@ -0,0 +1,136 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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
+ */
+
+OUTPUT_ARCH(m68k)
+/* Do we need any of these for elf?
+   __DYNAMIC = 0;    */
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  . = + SIZEOF_HEADERS;
+  .interp : { *(.interp) }
+  .hash          : { *(.hash)		}
+  .dynsym        : { *(.dynsym)		}
+  .dynstr        : { *(.dynstr)		}
+  .rel.text      : { *(.rel.text)		}
+  .rela.text     : { *(.rela.text) 	}
+  .rel.data      : { *(.rel.data)		}
+  .rela.data     : { *(.rela.data) 	}
+  .rel.rodata    : { *(.rel.rodata) 	}
+  .rela.rodata   : { *(.rela.rodata) 	}
+  .rel.got       : { *(.rel.got)		}
+  .rela.got      : { *(.rela.got)		}
+  .rel.ctors     : { *(.rel.ctors)	}
+  .rela.ctors    : { *(.rela.ctors)	}
+  .rel.dtors     : { *(.rel.dtors)	}
+  .rela.dtors    : { *(.rela.dtors)	}
+  .rel.bss       : { *(.rel.bss)		}
+  .rela.bss      : { *(.rela.bss)		}
+  .rel.plt       : { *(.rel.plt)		}
+  .rela.plt      : { *(.rela.plt)		}
+  .init          : { *(.init)	}
+  .plt : { *(.plt) }
+  .text      :
+  {
+    /* WARNING - the following is hand-optimized to fit within	*/
+    /* the sector layout of our flash chips!	XXX FIXME XXX	*/
+
+    cpu/mcf5227x/start.o		(.text)
+
+    *(.text)
+    *(.fixup)
+    *(.got1)
+  }
+  _etext = .;
+  PROVIDE (etext = .);
+  .rodata    :
+  {
+    *(.rodata)
+    *(.rodata1)
+  }
+  .fini      : { *(.fini)    } =0
+  .ctors     : { *(.ctors)   }
+  .dtors     : { *(.dtors)   }
+
+  /* Read-write section, merged into data segment: */
+  . = (. + 0x00FF) & 0xFFFFFF00;
+  _erotext = .;
+  PROVIDE (erotext = .);
+
+  .reloc   :
+  {
+    __got_start = .;
+    *(.got)
+    __got_end = .;
+    _GOT2_TABLE_ = .;
+    *(.got2)
+    _FIXUP_TABLE_ = .;
+    *(.fixup)
+  }
+  __got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >>2;
+  __fixup_entries = (. - _FIXUP_TABLE_)>>2;
+
+  .data    :
+  {
+    *(.data)
+    *(.data1)
+    *(.sdata)
+    *(.sdata2)
+    *(.dynamic)
+    CONSTRUCTORS
+  }
+  _edata  =  .;
+  PROVIDE (edata = .);
+
+  . = .;
+  __u_boot_cmd_start = .;
+  .u_boot_cmd : { *(.u_boot_cmd) }
+  __u_boot_cmd_end = .;
+
+
+  . = .;
+  __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       :
+  {
+   _sbss = .;
+   *(.sbss) *(.scommon)
+   *(.dynbss)
+   *(.bss)
+   *(COMMON)
+   . = ALIGN(4);
+   _ebss = .;
+  }
+  _end = . ;
+  PROVIDE (end = .);
+}