mkamsboot/rbutil/amsinfo : do not try to detect the model of a given Sansa AMS OF

The field we thought was representative of the model is not, it has
changed in the past for fuzev1 and fuzev2.
For example the value 0x23 is found in 2 old fuzev1 OF versions, and in
the c200v2 OF

The only reliable way to detect the model of a given OF is by using the
built-in list of md5sums.

Modify mkamsboot and rbutilqt to load the rockbox bootloader first, and
then check if the model in the bootloader corresponds to the model of
the known md5sum of the given OF.

That way we can continue to present the user with a list of known OF
versions in case the OF is unknown to mkamsboot

Also explicit the dependency of main.c on mkamsboot.h in case the
prototypes change
Correct the header's description not updated in r21648

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26248 a1c6a512-1295-4272-9138-f99709370657

4 files changed, 41 insertions, 65 deletions

diff --git a/rbutil/mkamsboot/Makefile b/rbutil/mkamsboot/Makefile
index 60e1ea8af8..8a9a4d3852 100644
--- a/rbutil/mkamsboot/Makefile
+++ b/rbutil/mkamsboot/Makefile
@@ -47,9 +47,9 @@ OBJS := $(patsubst %.c,%.o,$(addprefix $(OBJDIR),$(SOURCES)))
 LIBOBJS := $(patsubst %.c,%.o,$(addprefix $(OBJDIR),$(LIBSOURCES)))
 EXTRADEPS := $(LIBUCL)
 
-# explicit dependencies on dualboot.{c,h}
-$(OBJDIR)mkamsboot.o: dualboot.h dualboot.c mkamsboot.c
-$(OBJDIR)main.o: dualboot.h dualboot.c main.c
+# explicit dependencies on dualboot.{c,h} and mkamsboot.h
+$(OBJDIR)mkamsboot.o: dualboot.h dualboot.c mkamsboot.c mkamsboot.h
+$(OBJDIR)main.o: dualboot.h dualboot.c main.c mkamsboot.h
 
 $(OBJDIR)%.o: %.c
         @echo CC $< $
diff --git a/rbutil/mkamsboot/main.c b/rbutil/mkamsboot/main.c
index 1132334261..a864c2a5c1 100644
--- a/rbutil/mkamsboot/main.c
+++ b/rbutil/mkamsboot/main.c
@@ -59,6 +59,7 @@ int main(int argc, char* argv[])
     int rb_packedsize;
     int patchable;
     int totalsize;
+    int model;
     char errstr[200];
     struct md5sums sum;
     char md5sum[33]; /* 32 digits + \0 */
@@ -81,11 +82,21 @@ int main(int argc, char* argv[])
     bootfile = argv[2];
     outfile = argv[3];
 
+    /* Load bootloader file */
+    rb_packed = load_rockbox_file(bootfile, &model, &bootloader_size,
+            &rb_packedsize, errstr, sizeof(errstr));
+    if (rb_packed == NULL) {
+        fprintf(stderr, "%s", errstr);
+        fprintf(stderr, "[ERR]  Could not load %s\n", bootfile);
+        return 1;
+    }
+
     /* Load original firmware file */
-    buf = load_of_file(infile, &len, &sum,
+    buf = load_of_file(infile, model, &len, &sum,
             &firmware_size, &of_packed, &of_packedsize, errstr, sizeof(errstr));
 
     if (buf == NULL) {
+        free(rb_packed);
         fprintf(stderr, "%s", errstr);
         fprintf(stderr, "[ERR]  Could not load %s\n", infile);
         return 1;
@@ -96,17 +107,6 @@ int main(int argc, char* argv[])
             model_names[sum.model], hw_revisions[sum.model], sum.version);
 
 
-    /* Load bootloader file */
-    rb_packed = load_rockbox_file(bootfile, sum.model, &bootloader_size,
-            &rb_packedsize, errstr, sizeof(errstr));
-    if (rb_packed == NULL) {
-        fprintf(stderr, "%s", errstr);
-        fprintf(stderr, "[ERR]  Could not load %s\n", bootfile);
-        free(buf);
-        free(of_packed);
-        return 1;
-    }
-
     printf("[INFO] Firmware patching has begun !\n\n");
 
     fprintf(stderr, "[INFO] Original firmware size:   %d bytes\n",
diff --git a/rbutil/mkamsboot/mkamsboot.c b/rbutil/mkamsboot/mkamsboot.c
index 1ec9ec26e6..f47afe312a 100644
--- a/rbutil/mkamsboot/mkamsboot.c
+++ b/rbutil/mkamsboot/mkamsboot.c
@@ -323,30 +323,6 @@ static uint32_t calc_checksum(unsigned char* buf, uint32_t n)
     return sum;
 }
 
-static int get_model(int model_id)
-{
-    switch(model_id) {
-        case 0x1e:
-            return MODEL_FUZE;
-        case 0x22:
-            return MODEL_CLIP;
-        case 0x23:
-            return MODEL_C200V2;
-        case 0x24:
-            return MODEL_E200V2;
-        case 0x25:
-            return MODEL_M200V4;
-        case 0x27:
-            return MODEL_CLIPV2;
-        case 0x28:
-            return MODEL_CLIPPLUS;
-        case 0x70:
-            return MODEL_FUZEV2;
-    }
-
-    return MODEL_UNKNOWN;
-}
-
 /* Compress using nrv2e algorithm : Thumb decompressor fits in 168 bytes ! */
 static unsigned char* uclpack(unsigned char* inbuf, int insize, int* outsize)
 {
@@ -388,7 +364,7 @@ static unsigned char* uclpack(unsigned char* inbuf, int insize, int* outsize)
 
 /* Loads a Sansa AMS Original Firmware file into memory */
 unsigned char* load_of_file(
-        char* filename, off_t* bufsize, struct md5sums *sum,
+        char* filename, int model, off_t* bufsize, struct md5sums *sum,
         int* firmware_size, unsigned char** of_packed,
         int* of_packedsize, char* errstr, int errstrsize)
 {
@@ -397,7 +373,6 @@ unsigned char* load_of_file(
     off_t n;
     unsigned int i=0;
     uint32_t checksum;
-    int model_id;
     unsigned int last_word;
 
     fd = open(filename, O_RDONLY|O_BINARY);
@@ -425,21 +400,20 @@ unsigned char* load_of_file(
 
     if (i < NUM_MD5S) {
         *sum = sansasums[i];
+        if(sum->model != model) {
+            ERROR("[ERR]  OF File provided is %sv%d version %s, not for %sv%d\n",
+                model_names[sum->model], hw_revisions[sum->model],
+                sum->version, model_names[model], hw_revisions[model]
+            );
+        }
     } else {
-        int fw_version = (get_uint32le(&buf[0x204]) == 0x0000f000) ? 2 : 1;
-        model_id = buf[(fw_version == 2) ? 0x219 : 0x215];
-        sum->model = get_model(model_id);
-
-        if (sum->model == MODEL_UNKNOWN)
-            ERROR("[ERR]  Unknown firmware model (v%d) - model id 0x%02x\n",
-                  fw_version, model_id);
+        /* OF unknown, give a list of tested versions for the requested model */
 
-#if 1   /* comment to test new OFs */
         char tested_versions[100];
         tested_versions[0] = '\0';
 
         for (i = 0; i < NUM_MD5S ; i++)
-            if (sansasums[i].model == sum->model) {
+            if (sansasums[i].model == model) {
                 if (tested_versions[0] != '\0') {
                     strncat(tested_versions, ", ",
                         sizeof(tested_versions) - strlen(tested_versions) - 1);
@@ -449,9 +423,8 @@ unsigned char* load_of_file(
             }
 
         ERROR("[ERR]  Original firmware unknown, please try an other version." \
-              " Tested %s versions are : %s\n",
-              model_names[sum->model], tested_versions);
-#endif
+              " Tested %sv%d versions are : %s\n",
+              model_names[model], hw_revisions[model], tested_versions);
     }
 
     /* TODO: Do some more sanity checks on the OF image. Some images (like
@@ -484,7 +457,7 @@ error:
 
 /* Loads a rockbox bootloader file into memory */
 unsigned char* load_rockbox_file(
-            char* filename, int model, int* bufsize, int* rb_packedsize,
+            char* filename, int *model, int* bufsize, int* rb_packedsize,
             char* errstr, int errstrsize)
 {
     int fd;
@@ -504,10 +477,12 @@ unsigned char* load_rockbox_file(
     if (n != sizeof(header))
         ERROR("[ERR]  Could not read file %s\n", filename);
 
-    /* Check for correct model string */
-    if (memcmp(rb_model_names[model], header + 4, 4)!=0)
-        ERROR("[ERR]  Expected model name \"%s\" in %s, not \"%4.4s\"\n",
-                       rb_model_names[model], filename, (char*)header+4);
+    for(*model = 0; *model < NUM_MODELS; (*model)++)
+        if (memcmp(rb_model_names[*model], header + 4, 4) == 0)
+            break;
+
+    if(*model == NUM_MODELS)
+        ERROR("[ERR]  Model name \"%4.4s\" unknown. Is this really a rockbox bootloader?\n", header + 4);
 
     *bufsize = filesize(fd) - sizeof(header);
 
@@ -521,7 +496,7 @@ unsigned char* load_rockbox_file(
         ERROR("[ERR]  Could not read file %s\n", filename);
 
     /* Check checksum */
-    sum = rb_model_num[model];
+    sum = rb_model_num[*model];
     for (i = 0; i < *bufsize; i++) {
          /* add 8 unsigned bits but keep a 32 bit sum */
          sum += buf[i];
diff --git a/rbutil/mkamsboot/mkamsboot.h b/rbutil/mkamsboot/mkamsboot.h
index 835d024d98..d87a5df4f7 100644
--- a/rbutil/mkamsboot/mkamsboot.h
+++ b/rbutil/mkamsboot/mkamsboot.h
@@ -43,6 +43,9 @@ enum {
     MODEL_C200V2,
     MODEL_CLIPPLUS,
     MODEL_FUZEV2,
+    /* new models go here */
+
+    NUM_MODELS
 };
 
 
@@ -65,8 +68,7 @@ extern const int bootloader_sizes[];
  * ARGUMENTS
  *
  * filename         :   bootloader file to load
- * model            :   a 4 characters string representing the Sansa model
- *                      ("fuze", "clip", "e2v2", "m2v4", or "c2v2")
+ * model            :   will be set to this bootloader's model
  * bootloader_size  :   set to the uncompressed bootloader size
  * rb_packed_size   :   set to the size of compressed bootloader
  * errstr           :   provided buffer to store an eventual error
@@ -78,7 +80,7 @@ extern const int bootloader_sizes[];
  */
 
 unsigned char* load_rockbox_file(
-        char* filename, int model, int* bootloader_size, int* rb_packedsize,
+        char* filename, int *model, int* bootloader_size, int* rb_packedsize,
         char* errstr, int errstrsize);
 
 
@@ -89,10 +91,9 @@ unsigned char* load_rockbox_file(
  * ARGUMENTS
  *
  * filename         :   firmware file to load
+ * model            :   desired player's model
  * bufsize          :   set to firmware file size
  * md5sum           :   set to file md5sum, must be at least 33 bytes long
- * model            :   set to firmware model (MODEL_XXX)
- * fw_version       :   set to firmware format version (1 or 2)
  * firmware_size    :   set to firmware block's size
  * of_packed        :   pointer to allocated memory containing the compressed
  *                      original firmware block
@@ -106,7 +107,7 @@ unsigned char* load_rockbox_file(
  */
 
 unsigned char* load_of_file(
-        char* filename, off_t* bufsize, struct md5sums *sum,
+        char* filename, int model, off_t* bufsize, struct md5sums *sum,
         int* firmware_size, unsigned char** of_packed,
         int* of_packedsize, char* errstr, int errstrsize);