[flashrom] [PATCH] Support Dediprog SF100 bulk read

[Carl-Daniel Hailfinger]

Support Dediprog SF100 bulk read.

Packet size is 512 bytes. Depending on your USB hardware and the
Dediprog firmware version, this may not work at all.
Untested, experimental, may hang/crash the programmer.

Read tests of random images are appreciated.

Signed-off-by: Carl-Daniel Hailfinger

Index: flashrom-dediprog_read_bulk/dediprog.c
===================================================================
--- flashrom-dediprog_read_bulk/dediprog.c	(Revision 1225)
+++ flashrom-dediprog_read_bulk/dediprog.c	(Arbeitskopie)
@@ -26,6 +26,7 @@

#define DEFAULT_TIMEOUT 3000
 static usb_dev_handle *dediprog_handle;
+static int dediprog_endpoint;

#if 0
 /* Might be useful for other pieces of code as well. */
@@ -148,9 +149,36 @@

int dediprog_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len)
 {
+	int ret;
+	int i;
+	int chunksize = 0x200; /* 512 */
+	int count = flash->total_size * 1024 / chunksize;
+	/* Guessed. */
+	const char count_and_chunk[] = {(count >> 8) & 0xff,
+				count & 0xff,
+				(chunksize >> 8) & 0xff,
+				chunksize & 0xff};
+
    msg_pspew("%s, start=0x%x, len=0x%x\n", __func__, start, len);
-	/* Chosen read length is 16 bytes for now. */
-	return spi_read_chunked(flash, buf, start, len, 16);
+	if ((len != flash->total_size * 1024) || (start != 0)) {
+		msg_perr("Only a full chip read is supported for now. Wanted "
+			 "start=%i, length=%i\n.", start, len);
+		return 1;
+	}
+
+	/* Command Read SPI Bulk. No idea which read command is used on the SPI side. */
+	usb_control_msg(dediprog_handle, 0x42, 0x20, 0x0000, 0x0000, (char *)count_and_chunk, 0x0004, DEFAULT_TIMEOUT);
+
+	for (i = 0; i < count; i++) {
+		ret = usb_bulk_read(dediprog_handle, dediprog_endpoint, (char *)buf + i * chunksize, chunksize, DEFAULT_TIMEOUT);
+		if (ret != chunksize) {
+			msg_perr("SPI bulk read failed, expected %i, got %i %s!\n",
+				 chunksize, ret, usb_strerror());
+			return 1;
+		}
+	}
+
+	return 0;
 }

int dediprog_spi_send_command(unsigned int writecnt, unsigned int readcnt,
@@ -301,6 +329,7 @@
    dediprog_handle = usb_open(dev);
    usb_set_configuration(dediprog_handle, 1);
    usb_claim_interface(dediprog_handle, 0);
+	dediprog_endpoint = 2;
    /* URB 6. Command A. */
    if (dediprog_command_a())
    	return 1;