From c8836112c6f88298f7d43eab0e83e05ca87eaf91 Mon Sep 17 00:00:00 2001
From: Rob Purchase <shotofadds@rockbox.org>
Date: Wed, 12 Mar 2008 20:57:19 +0000
Subject: Cowon D2: Make the bootloader functional (usage instructions to
 appear on the CowonD2Info wikipage shortly). Also re-enable IRAM by reducing
 Tremor's ICODE usage.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16646 a1c6a512-1295-4272-9138-f99709370657
---
 bootloader/telechips.c           | 55 +++++++++++++++++++---------------------
 firmware/export/config-cowond2.h |  6 +++++
 firmware/export/config.h         |  2 +-
 3 files changed, 33 insertions(+), 30 deletions(-)

diff --git a/bootloader/telechips.c b/bootloader/telechips.c
index dcb0c48d6c..8d2e36914b 100644
--- a/bootloader/telechips.c
+++ b/bootloader/telechips.c
@@ -43,12 +43,15 @@
 
 #if defined(COWON_D2)
 #include "i2c.h"
+#define LOAD_ADDRESS 0x20000000 /* DRAM_START */
 #endif
 
 char version[] = APPSVERSION;
 
 extern int line;
 
+#define MAX_LOAD_SIZE (8*1024*1024) /* Arbitrary, but plenty. */
+
 void* main(void)
 {
     int button;
@@ -56,9 +59,9 @@ void* main(void)
     int count = 0;
     bool do_power_off = false;
     
-#if defined(COWON_D2)
-    int i,rc,fd,len;
-    int* buf = (int*)0x21000000; /* Unused DRAM */
+#if defined(COWON_D2) && defined(TCCBOOT)
+    int rc;
+    unsigned char* loadbuffer = (unsigned char*)LOAD_ADDRESS;
 #endif
 
     power_init();
@@ -78,7 +81,12 @@ void* main(void)
 
     _backlight_on();
 
-#if defined(COWON_D2)
+/* Only load the firmware if TCCBOOT is defined - this ensures SDRAM_START is
+   available for loading the firmware. Otherwise display the debug screen. */
+#if defined(COWON_D2) && defined(TCCBOOT)
+    printf("Rockbox boot loader");
+    printf("Version %s", version);
+
     printf("ATA");
     rc = ata_init();
     if(rc)
@@ -94,36 +102,20 @@ void* main(void)
         error(EDISK,rc);
     }
 
-#if 0
-    printf("opening test file...");
+    rc = load_firmware(loadbuffer, BOOTFILE, MAX_LOAD_SIZE);
 
-    fd = open("/test.bin", O_RDONLY);
-    if (fd < 0) panicf("could not open test file");
-    
-    len = filesize(fd);
-    printf("Length: %x", len);
-
-    lseek(fd, 0, SEEK_SET);
-    read(fd, buf, len);
-    close(fd);
-    
-    printf("testing contents...");
-    
-    i = 0;
-    while (buf[i] == i && i<(len/4)) { i++; }
-
-    if (i < len/4)
+    if (rc < 0)
     {
-        printf("mismatch at %x [0x%x]", i, buf[i]);
+        error(EBOOTFILE,rc);
     }
-    else
+    else if (rc == EOK)
     {
-        printf("passed!");
+        int(*kernel_entry)(void);
+
+        kernel_entry = (void*) loadbuffer;
+        rc = kernel_entry();
     }
-    while (!button_read_device()) {};
-    while (button_read_device()) {};
-#endif
-#endif
+#else
 
     while(!do_power_off) {
         line = 0;
@@ -145,6 +137,8 @@ void* main(void)
         printf("Btn: 0x%08x",button);
 
 #if defined(COWON_D2)
+        int i;
+
         printf("GPIOA: 0x%08x",GPIOA);
         printf("GPIOB: 0x%08x",GPIOB);
         printf("GPIOC: 0x%08x",GPIOC);
@@ -195,6 +189,9 @@ void* main(void)
     /* Power-off */
     power_off();
 
+    printf("(NOT) POWERED OFF");
+#endif
+
     return 0;
 }
 
diff --git a/firmware/export/config-cowond2.h b/firmware/export/config-cowond2.h
index 78b963c58d..9363f67683 100644
--- a/firmware/export/config-cowond2.h
+++ b/firmware/export/config-cowond2.h
@@ -6,6 +6,9 @@
 /* For Rolo and boot loader */
 #define MODEL_NUMBER 24
 
+/* Produce a dual-boot bootloader.bin for mktccboot */
+#define TCCBOOT
+
 /* define this if you have recording possibility */
 //#define HAVE_RECORDING
 
@@ -63,6 +66,9 @@
 /* Define this if you have a software controlled poweroff */
 #define HAVE_SW_POWEROFF
 
+/* Reduce Tremor's ICODE usage */
+#define ICODE_ATTR_TREMOR_NOT_MDCT
+
 /* The number of bytes reserved for loadable codecs */
 #define CODEC_SIZE 0x80000
 
diff --git a/firmware/export/config.h b/firmware/export/config.h
index e1c0cbc938..6a04504613 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -400,7 +400,7 @@
     defined(CPU_COLDFIRE) || /* Coldfire: core, plugins, codecs */ \
     defined(CPU_PP) ||  /* PortalPlayer: core, plugins, codecs */ \
     defined(CPU_TCC77X) ||  /* Telechips: core, plugins, codecs */ \
-    /*defined(CPU_TCC780X) || /. Telechips: core, plugins, codecs */ \
+    defined(CPU_TCC780X) || /* Telechips: core, plugins, codecs */ \
     (CONFIG_CPU == PNX0101))
 #define ICODE_ATTR      __attribute__ ((section(".icode")))
 #define ICONST_ATTR     __attribute__ ((section(".irodata")))
-- 
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