[osmocon] add a chainloading mode for the compal ramloader

The idea is to load a small application to the phone, which
activates and executes the Calypso romloader. The payload
itself then is loaded with the romloader, bypassing the magic
and the resulting size limit on the C139/C140 and J100i.

Signed-off-by: Steve Markgraf <steve@steve-m.de>

1 files changed, 27 insertions, 6 deletions

diff --git a/src/host/osmocon/osmocon.c b/src/host/osmocon/osmocon.c
index 58fa0cdc..d702d745 100644
--- a/src/host/osmocon/osmocon.c
+++ b/src/host/osmocon/osmocon.c
@@ -131,6 +131,7 @@ struct dnload {
 	enum dnload_mode mode;
 	struct bsc_fd serial_fd;
 	char *filename;
+	char *chainload_filename;
 
 	int expect_hdlc;
 
@@ -875,6 +876,20 @@ static int handle_read(void)
 		dnload.state = WAITING_PROMPT1;
 		dnload.write_ptr = dnload.data;
 		dnload.expect_hdlc = 1;
+
+		/* check for romloader chainloading mode used as a workaround
+		 * for the magic on the C139/C140 and J100i */
+		if (dnload.chainload_filename != NULL) {
+			printf("Enabled Compal ramloader -> Calypso romloader"
+				" chainloading mode\n");
+			bufptr = buffer;
+			dnload.filename = dnload.chainload_filename;
+			dnload.mode = MODE_ROMLOAD;
+			serial_set_baudrate(ROMLOAD_INIT_BAUDRATE);
+			tick_timer.cb = &beacon_timer_cb;
+			tick_timer.data = &tick_timer;
+			bsc_schedule_timer(&tick_timer, 0, BEACON_INTERVAL);
+		}
 	} else if (!memcmp(buffer, phone_nack, sizeof(phone_nack))) {
 		printf("Received DOWNLOAD NACK from phone, something went"
 			" wrong :(\n");
@@ -1224,10 +1239,12 @@ static int parse_mode(const char *arg)
 }
 
 #define HELP_TEXT \
-	"[ -v | -h ] [ -d [t][r] ] [ -p /dev/ttyXXXX ] [ -s /tmp/osmocom_l2 ]\n" \
-	"\t\t[ -l /tmp/osmocom_loader ]\n" \
-	"\t\t[ -m {c123,c123xor,c140,c140xor,c155,romload,mtk} ]\n" \
-	"\t\t file.bin\n\n" \
+	"[ -v | -h ] [ -d [t][r] ] [ -p /dev/ttyXXXX ]\n" \
+	"\t\t [ -s /tmp/osmocom_l2 ]\n" \
+	"\t\t [ -l /tmp/osmocom_loader ]\n" \
+	"\t\t [ -m {c123,c123xor,c140,c140xor,c155,romload,mtk} ]\n" \
+	"\t\t [ -c /to-be-chainloaded-file.bin ]\n" \
+	"\t\t  file.bin\n\n" \
 	"* Open serial port /dev/ttyXXXX (connected to your phone)\n" \
 	"* Perform handshaking with the ramloader in the phone\n" \
 	"* Download file.bin to the attached phone (base address 0x00800100)\n"
@@ -1428,14 +1445,15 @@ void parse_debug(const char *str)
 int main(int argc, char **argv)
 {
 	int opt, flags;
-	uint32_t tmp_load_address = 0;
+	uint32_t tmp_load_address = ROMLOAD_ADDRESS;
 	const char *serial_dev = "/dev/ttyUSB1";
 	const char *layer2_un_path = "/tmp/osmocom_l2";
 	const char *loader_un_path = "/tmp/osmocom_loader";
 
 	dnload.mode = MODE_C123;
+	dnload.chainload_filename = NULL;
 
-	while ((opt = getopt(argc, argv, "d:hl:p:m:s:v")) != -1) {
+	while ((opt = getopt(argc, argv, "d:hl:p:m:c:s:v")) != -1) {
 		switch (opt) {
 		case 'p':
 			serial_dev = optarg;
@@ -1457,6 +1475,9 @@ int main(int argc, char **argv)
 		case 'd':
 			parse_debug(optarg);
 			break;
+		case 'c':
+			dnload.chainload_filename = optarg;
+			break;
 		case 'h':
 		default:
 			usage(argv[0]);