misc: Add driver/ and loader/ source found on ArchLinux

http://aur.archlinux.org/packages.php?ID=31596&detail=1 links to
http://txrxio.net/wp/basket/makingthings/sam7utils-0.2.1.tar.gz that
contains the driver and the loader sourcecode. I am not sure how this
relates to loader256_data.h and loader128_data.h

5 files changed, 295 insertions, 0 deletions

diff --git a/loader/at91.h b/loader/at91.h
new file mode 100644
index 0000000..5f38a53
--- /dev/null
+++ b/loader/at91.h
@@ -0,0 +1,61 @@
+/*
+ * loader/at91.h
+ *
+ * Copyright (C) 2006 Erik Gilling, all rights reserved
+ *
+ *	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, version 2.
+ *
+ */
+
+#define AT91_FLASH_ADDR ((uint32_t *) 0x100000)
+
+typedef unsigned int    uint32_t;
+typedef signed int      int32_t;
+
+typedef unsigned short  uint16_t;
+typedef signed short    int16_t;
+
+typedef unsigned char   uint8_t;
+typedef signed char     int8_t;
+
+typedef volatile uint32_t arm_reg_t;
+
+typedef struct {
+  arm_reg_t  rcr;      /* 00 - Remap Control Register */
+  arm_reg_t  asr;      /* 04 - Abort Status Rebister */
+  arm_reg_t  aasr;     /* 08 - Abort Address Status Register */
+  arm_reg_t  res[21];  /* 0C..5C - Reserved */
+  arm_reg_t  fmr;      /* 60 - Flash Mode Register */
+  arm_reg_t  fcr;      /* 64 - Flash Command Register */
+  arm_reg_t  fsr;      /* 68 - Flash Status Register */
+} at91_mc_t;
+
+extern volatile at91_mc_t mc;
+
+#define AT91_MC_FMR_FRDY            (1<<0)
+#define AT91_MC_FMR_LOCKE           (1<<2)
+#define AT91_MC_FMR_PROGE           (1<<3)
+#define AT91_MC_FMR_NEBP            (1<<7)
+#define AT91_MC_FMR_WAIT_STATE_1_2  (0<<8)
+#define AT91_MC_FMR_WAIT_STATE_2_3  (1<<8)
+#define AT91_MC_FMR_WAIT_STATE_3_4  (2<<8)
+#define AT91_MC_FMR_WAIT_STATE_4_4  (3<<8)
+#define AT91_MC_FMR_FMCN( x )       (((x)&0xff) << 16)
+
+
+#define AT91_MC_FCR_FCMD_NOP        0x0
+#define AT91_MC_FCR_FCMD_WP         0x1
+#define AT91_MC_FCR_FCMD_SLB        0x2
+#define AT91_MC_FCR_FCMD_WPL        0x3
+#define AT91_MC_FCR_FCMD_CLB        0x4
+#define AT91_MC_FCR_FCMD_EA         0x8
+#define AT91_MC_FCR_FCMD_SGPB       0xb
+#define AT91_MC_FCR_FCMD_CGPB       0xd
+#define AT91_MC_FCR_FCMD_SSB        0xf
+
+#define AT91_MC_FCR_PAGEN( x )      (((x)&0x3ff)<<8)
+
+#define AT91_MC_FCR_KEY             (0x5A << 24)
+
diff --git a/loader/bin2c.c b/loader/bin2c.c
new file mode 100644
index 0000000..9e16991
--- /dev/null
+++ b/loader/bin2c.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+
+int main( int argc, char *argv[] ) 
+{
+  char *data_name = "data";
+  int c;
+  int i=0;
+  
+  if( argc == 2 ) {
+    data_name = argv[1];
+  }
+
+  printf( "uint8_t %s[] = {\n", data_name );
+
+  while( (c = getchar()) >= 0 ) {
+    if( i== 0 ) {
+      printf( "\t" );
+    } else if( i%8 == 0 ) {
+      printf( ",\n\t" );
+    } else {
+      printf( ", " );
+    }
+    i++;
+    printf( "0x%02x", c );
+  }
+
+  printf( "\n};\n" );
+
+  return 0;
+}
diff --git a/loader/crt0.S b/loader/crt0.S
new file mode 100644
index 0000000..bb0a94f
--- /dev/null
+++ b/loader/crt0.S
@@ -0,0 +1,28 @@
+//
+// loader/crt0.S
+//
+// Copyright (C) 2006 Erik Gilling, all rights reserved
+//
+//	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, version 2.
+//
+//
+	.EQU	STACK, 0x201C00
+		
+	.code 32
+	.align 2
+
+	.global _entry
+	.func	_entry
+_entry:
+	//  init stack
+	ldr	sp, =STACK
+
+	//  save lr
+	stmfd	sp!, {lr}
+
+	bl main
+
+	ldmia	sp!, {r0}
+	bx	r0
diff --git a/loader/loader.c b/loader/loader.c
new file mode 100644
index 0000000..2dc67ff
--- /dev/null
+++ b/loader/loader.c
@@ -0,0 +1,48 @@
+/*
+ * loader/loader.c
+ *
+ * Copyright (C) 2006 Erik Gilling, all rights reserved
+ *
+ *	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, version 2.
+ *
+ */
+
+#include "at91.h"
+
+// SAM-BA apears to write the following data to 0x201400
+//
+//        0x00: data0
+//        0x01: data1
+//                ...
+// PAGE_SIZE-1: last data byte
+// PAGE_SIZE  : page number to write
+
+
+#define SAMBA_PAGE_BUFF ((uint32_t *) 0x201400)
+
+int main( void )
+{
+  int i;
+  uint32_t *page_buff = SAMBA_PAGE_BUFF;
+  // keep this in units of 32 bit words
+  int page_num = *(page_buff+PAGE_SIZE/4);
+  int page_offset = page_num * PAGE_SIZE/4;
+
+  // wait for mc to be ready
+  while( !(mc.fsr & AT91_MC_FMR_FRDY) ) { }
+
+  // write samba page buffer to flash buffer
+  for( i=0 ; i < (PAGE_SIZE/4) ; i++ ) {
+    AT91_FLASH_ADDR[ page_offset + i ] =  page_buff[i];
+  }
+
+  // write page
+  mc.fcr = AT91_MC_FCR_FCMD_WP | AT91_MC_FCR_PAGEN(page_num) |  
+    AT91_MC_FCR_KEY;
+
+  // dont wait for mc to be ready here so that flash ops can stack
+  
+  return 0;
+}
diff --git a/loader/loader.lds b/loader/loader.lds
new file mode 100644
index 0000000..32fcf50
--- /dev/null
+++ b/loader/loader.lds
@@ -0,0 +1,128 @@
+/***********************************************************************/
+/*                                                                     */
+/*  ROM.ld:  Linker Script File                                        */
+/*                                                                     */
+/***********************************************************************/
+ENTRY(_entry)
+
+MEMORY
+{
+	LOADER(rwx) : ORIGIN = 0x00201600, LENGTH = 0xEA00
+}
+
+/* Section Definitions */
+SECTIONS
+{
+
+  /* first section is .text which is used for code */
+   .text :
+  {
+	_text = .;
+	PROVIDE (text = _text);	
+	*crt0.o (.text)            /* Startup code */
+	*(.text .text.*)           /* remaining code */
+	*(.gnu.linkonce.t.*)
+	*(.glue_7)
+	*(.glue_7t)
+	*(.gcc_except_table)
+	*(.rodata)                 /* read-only data (constants) */
+	*(.rodata*)
+	*(.gnu.linkonce.r.*)
+  } > LOADER
+  
+  . = ALIGN(4);
+
+  _etext = . ;
+  PROVIDE (etext = .);
+
+  /* .data section which is used for initialized data */
+  .data : AT (_etext)
+  {
+    _data = .;
+    *(.data)
+	*(.data.*)
+	*(.gnu.linkonce.d*)
+	SORT(CONSTRUCTORS) /* mt 4/2005 */
+  } > LOADER
+ 
+  . = ALIGN(4);
+  _edata = . ;
+  PROVIDE (edata = .);
+
+  /* .bss section which is used for uninitialized data */
+  .bss (NOLOAD) :
+  {
+    __bss_start = . ;
+    __bss_start__ = . ;
+    *(.bss)
+	*(.gnu.linkonce.b*)
+    *(COMMON)
+    . = ALIGN(4);
+  } > LOADER
+
+  . = ALIGN(4);
+  __bss_end__ = . ;
+  PROVIDE (__bss_end = .);
+
+
+
+  _end = . ;
+  PROVIDE (end = .);
+
+  /* Stabs debugging sections.  */
+  .stab          0 : { *(.stab) }
+  .stabstr       0 : { *(.stabstr) }
+  .stab.excl     0 : { *(.stab.excl) }
+  .stab.exclstr  0 : { *(.stab.exclstr) }
+  .stab.index    0 : { *(.stab.index) }
+  .stab.indexstr 0 : { *(.stab.indexstr) }
+  .comment       0 : { *(.comment) }
+  /* DWARF debug sections.
+     Symbols in the DWARF debugging sections are relative to the beginning
+     of the section so we begin them at 0.  */
+  /* DWARF 1 */
+  .debug          0 : { *(.debug) }
+  .line           0 : { *(.line) }
+  /* GNU DWARF 1 extensions */
+  .debug_srcinfo  0 : { *(.debug_srcinfo) }
+  .debug_sfnames  0 : { *(.debug_sfnames) }
+  /* DWARF 1.1 and DWARF 2 */
+  .debug_aranges  0 : { *(.debug_aranges) }
+  .debug_pubnames 0 : { *(.debug_pubnames) }
+  /* DWARF 2 */
+  .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+  .debug_abbrev   0 : { *(.debug_abbrev) }
+  .debug_line     0 : { *(.debug_line) }
+  .debug_frame    0 : { *(.debug_frame) }
+  .debug_str      0 : { *(.debug_str) }
+  .debug_loc      0 : { *(.debug_loc) }
+  .debug_macinfo  0 : { *(.debug_macinfo) }
+  /* SGI/MIPS DWARF 2 extensions */
+  .debug_weaknames 0 : { *(.debug_weaknames) }
+  .debug_funcnames 0 : { *(.debug_funcnames) }
+  .debug_typenames 0 : { *(.debug_typenames) }
+  .debug_varnames  0 : { *(.debug_varnames) }
+}
+
+
+PROVIDE(tc     = 0xFFFA0000);
+PROVIDE(udp    = 0xFFFB0000);
+PROVIDE(twi    = 0xFFFB8000);
+PROVIDE(usart0 = 0xFFFC0000);
+PROVIDE(usart1 = 0xFFFC4000);
+PROVIDE(pwmc   = 0xFFFCC000);
+PROVIDE(ssc    = 0xFFFD4000);
+PROVIDE(adc    = 0xFFFD8000);
+PROVIDE(spi    = 0xFFFE0000);
+PROVIDE(aic    = 0xFFFFF000);
+PROVIDE(dbgu   = 0xFFFFF200);
+PROVIDE(pioa   = 0xFFFFF400);
+PROVIDE(pmc    = 0xFFFFFC00);
+PROVIDE(rstc   = 0xFFFFFD00);
+PROVIDE(rtt    = 0xFFFFFD20);
+PROVIDE(pit    = 0xFFFFFD30);
+PROVIDE(wdt    = 0xFFFFFD40);
+PROVIDE(vreg   = 0xFFFFFD60);
+PROVIDE(mc     = 0xFFFFFF00);
+
+