dediprog.c - flashprog - Gitiles

 /*
  * This file is part of the flashrom project.
  *
  * Copyright (C) 2010 Carl-Daniel Hailfinger
  *
  * 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 of the License.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */

 #include <string.h>
 #include <usb.h>
 #include "flash.h"
 #include "chipdrivers.h"
 #include "spi.h"

 #define DEFAULT_TIMEOUT 3000
 usb_dev_handle *dediprog_handle;

 int dediprog_do_stuff(void);

 void print_hex(void *buf, size_t len)
 {
 	size_t i;

 	for (i = 0; i < len; i++)
 		msg_pdbg(" %02x", ((uint8_t *)buf)[i]);
 }

 struct usb_device *get_device_by_vid_pid(uint16_t vid, uint16_t pid)
 {
 	struct usb_bus *bus;
 	struct usb_device *dev;

 	for (bus = usb_get_busses(); bus; bus = bus->next)
 		for (dev = bus->devices; dev; dev = dev->next)
 			if ((dev->descriptor.idVendor == vid) &&
 			    (dev->descriptor.idProduct == pid))
 				return dev;

 	return NULL;
 }

 //int usb_control_msg(usb_dev_handle *dev, int requesttype, int request, int value, int index, char *bytes, int size, int timeout);

 int dediprog_set_spi_voltage(uint16_t voltage)
 {
 	int ret;
 	unsigned int mv;

 	switch (voltage) {
 	case 0x0:
 		/* Admittedly this one is an assumption. */
 		mv = 0;
 		break;
 	case 0x12:
 		mv = 1800;
 		break;
 	case 0x11:
 		mv = 2500;
 		break;
 	case 0x10:
 		mv = 3500;
 		break;
 	default:
 		msg_perr("Unknown voltage selector 0x%x! Aborting.\n", voltage);
 		return 1;
 	}
 	msg_pdbg("Setting SPI voltage to %u.%03u V\n", mv / 1000, mv % 1000);

 	ret = usb_control_msg(dediprog_handle, 0x42, 0x9, voltage, 0xff, NULL, 0x0, DEFAULT_TIMEOUT);
 	if (ret != 0x0) {
 		msg_perr("Command Set SPI Voltage 0x%x failed!\n", voltage);
 		return 1;
 	}
 	return 0;
 }

 /* After dediprog_set_spi_speed, the original app always calls
  * dediprog_set_spi_voltage(0) and then
  * dediprog_check_devicestring() four times in a row.
  * After that, dediprog_command_a() is called.
  * This looks suspiciously like the microprocessor in the SF100 has to be
  * restarted/reinitialized in case the speed changes.
  */
 int dediprog_set_spi_speed(uint16_t speed)
 {
 	int ret;
 	unsigned int khz;

 	/* Case 1 and 2 are in weird order. Probably an organically "grown"
 	 * interface.
 	 * Base frequency is 24000 kHz, divisors are (in order)
 	 * 1, 3, 2, 8, 11, 16, 32, 64.
 	 */
 	switch (speed) {
 	case 0x0:
 		khz = 24000;
 		break;
 	case 0x1:
 		khz = 8000;
 		break;
 	case 0x2:
 		khz = 12000;
 		break;
 	case 0x3:
 		khz = 3000;
 		break;
 	case 0x4:
 		khz = 2180;
 		break;
 	case 0x5:
 		khz = 1500;
 		break;
 	case 0x6:
 		khz = 750;
 		break;
 	case 0x7:
 		khz = 375;
 		break;
 	default:
 		msg_perr("Unknown frequency selector 0x%x! Aborting.\n", speed);
 		return 1;
 	}
 	msg_pdbg("Setting SPI speed to %u kHz\n", khz);

 	ret = usb_control_msg(dediprog_handle, 0x42, 0x61, speed, 0xff, NULL, 0x0, DEFAULT_TIMEOUT);
 	if (ret != 0x0) {
 		msg_perr("Command Set SPI Speed 0x%x failed!\n", speed);
 		return 1;
 	}
 	return 0;
 }

 int dediprog_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len)
 {
 	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);
 }

 int dediprog_spi_send_command(unsigned int writecnt, unsigned int readcnt,
 			const unsigned char *writearr, unsigned char *readarr)
 {
 	int ret;

 	msg_pspew("%s, writecnt=%i, readcnt=%i\n", __func__, writecnt, readcnt);
 	/* Paranoid, but I don't want to be blamed if anything explodes. */
 	if (writecnt > 5) {
 		msg_perr("Untested writecnt=%i, aborting.\n", writecnt);
 		return 1;
 	}
 	/* 16 byte reads should work. */
 	if (readcnt > 16) {
 		msg_perr("Untested readcnt=%i, aborting.\n", readcnt);
 		return 1;
 	}

 	ret = usb_control_msg(dediprog_handle, 0x42, 0x1, 0xff, readcnt ? 0x1 : 0x0, (char *)writearr, writecnt, DEFAULT_TIMEOUT);
 	if (ret != writecnt) {
 		msg_perr("Send SPI failed, expected %i, got %i %s!\n",
 			 writecnt, ret, usb_strerror());
 		return 1;
 	}
 	if (!readcnt)
 		return 0;
 	memset(readarr, 0, readcnt);
 	ret = usb_control_msg(dediprog_handle, 0xc2, 0x01, 0xbb8, 0x0000, (char *)readarr, readcnt, DEFAULT_TIMEOUT);
 	if (ret != readcnt) {
 		msg_perr("Receive SPI failed, expected %i, got %i %s!\n",
 			 readcnt, ret, usb_strerror());
 		return 1;
 	}
 	return 0;
 }

 int dediprog_check_devicestring(void)
 {
 	int ret;
 	char buf[0x11];

 	/* Command Prepare Receive Device String. */
 	memset(buf, 0, sizeof(buf));
 	ret = usb_control_msg(dediprog_handle, 0xc3, 0x7, 0x0, 0xef03, buf, 0x1, DEFAULT_TIMEOUT);
 	/* The char casting is needed to stop gcc complaining about an always true comparison. */
 	if ((ret != 0x1) || (buf[0] != (char)0xff)) {
 		msg_perr("Unexpected response to Command Prepare Receive Device"
 			 " String!\n");
 		return 1;
 	}
 	/* Command Receive Device String. */
 	memset(buf, 0, sizeof(buf));
 	ret = usb_control_msg(dediprog_handle, 0xc2, 0x8, 0xff, 0xff, buf, 0x10, DEFAULT_TIMEOUT);
 	if (ret != 0x10) {
 		msg_perr("Incomplete/failed Command Receive Device String!\n");
 		return 1;
 	}
 	buf[0x10] = '\0';
 	msg_pdbg("Found a %s\n", buf);
 	if (memcmp(buf, "SF100", 0x5)) {
 		msg_perr("Device not a SF100!\n");
 		return 1;
 	}
 	/* Only these versions were tested. */
 	if (memcmp(buf, "SF100   V:2.1.1 ", 0x10) &&
 	    memcmp(buf, "SF100   V:3.1.8 ", 0x10)) {
 		msg_perr("Unexpected firmware version!\n");
 		return 1;
 	}
 	return 0;
 }

 /* Command A seems to be some sort of device init. It is either followed by
  * dediprog_check_devicestring (often) or Command A (often) or
  * Command F (once).
  */
 int dediprog_command_a(void)
 {
 	int ret;
 	char buf[0x1];

 	memset(buf, 0, sizeof(buf));
 	ret = usb_control_msg(dediprog_handle, 0xc3, 0xb, 0x0, 0x0, buf, 0x1, DEFAULT_TIMEOUT);
 	if ((ret != 0x1) || (buf[0] != 0x6f)) {
 		msg_perr("Unexpected response to Command A!\n");
 		return 1;
 	}
 	return 0;
 }

 /* Command C is only sent after dediprog_check_devicestring, but not after every
  * invocation of dediprog_check_devicestring. It is only sent after the first
  * dediprog_command_a(); dediprog_check_devicestring() sequence in each session.
  * I'm tempted to call this one start_SPI_engine or finish_init.
  */
 int dediprog_command_c(void)
 {
 	int ret;

 	ret = usb_control_msg(dediprog_handle, 0x42, 0x4, 0x0, 0x0, NULL, 0x0, DEFAULT_TIMEOUT);
 	if (ret != 0x0) {
 		msg_perr("Unexpected response to Command C!\n");
 		return 1;
 	}
 	return 0;
 }

 /* Very strange. Seems to be a programmer keepalive or somesuch.
  * Wait unsuccessfully for timeout ms to read one byte.
  * Is usually called after setting voltage to 0.
  */
 int dediprog_command_f(int timeout)
 {
 	int ret;
 	char buf[0x1];

 	memset(buf, 0, sizeof(buf));
 	ret = usb_control_msg(dediprog_handle, 0xc2, 0x11, 0xff, 0xff, buf, 0x1, timeout);
 	if (ret != 0x0) {
 		msg_perr("Unexpected response to Command F!\n");
 		return 1;
 	}
 	return 0;
 }

 /* URB numbers refer to the first log ever captured. */
 int dediprog_init(void)
 {
 	struct usb_device *dev;

 	msg_pspew("%s\n", __func__);

 	/* Here comes the USB stuff. */
 	usb_init();
 	usb_find_busses();
 	usb_find_devices();
 	dev = get_device_by_vid_pid(0x0483, 0xdada);
 	if (!dev) {
 		msg_perr("Could not find a Dediprog SF100 on USB!\n");
 		return 1;
 	}
 	msg_pdbg("Found USB device (%04x:%04x).\n",
 		 dev->descriptor.idVendor,
 		 dev->descriptor.idProduct);
 	dediprog_handle = usb_open(dev);
 	usb_set_configuration(dediprog_handle, 1);
 	usb_claim_interface(dediprog_handle, 0);
 	/* URB 6. Command A. */
 	if (dediprog_command_a())
 		return 1;
 	/* URB 7. Command A. */
 	if (dediprog_command_a())
 		return 1;
 	/* URB 8. Command Prepare Receive Device String. */
 	/* URB 9. Command Receive Device String. */
 	if (dediprog_check_devicestring())
 		return 1;
 	/* URB 10. Command C. */
 	if (dediprog_command_c())
 		return 1;
 	/* URB 11. Command Set SPI Voltage. */
 	if (dediprog_set_spi_voltage(0x10))
 		return 1;

 	buses_supported = CHIP_BUSTYPE_SPI;
 	spi_controller = SPI_CONTROLLER_DEDIPROG;

 	/* RE leftover, leave in until the driver is complete. */
 #if 0
 	/* Execute RDID by hand if you want to test it. */
 	dediprog_do_stuff();
 #endif

 	return 0;
 }

 /* Leftovers from reverse engineering. Keep for documentation purposes until
  * completely understood.
  */
 int dediprog_do_stuff(void)
 {
 	char buf[0x4];
 	/* SPI command processing starts here. */

 	/* URB 12. Command Send SPI. */
 	/* URB 13. Command Receive SPI. */
 	memset(buf, 0, sizeof(buf));
 	/* JEDEC RDID */
 	msg_pdbg("Sending RDID\n");
 	buf[0] = JEDEC_RDID;
 	if (dediprog_spi_send_command(JEDEC_RDID_OUTSIZE, JEDEC_RDID_INSIZE, (unsigned char *)buf, (unsigned char *)buf))
 		return 1;
 	msg_pdbg("Receiving response: ");
 	print_hex(buf, JEDEC_RDID_INSIZE);
 #if 0
 	/* URB 14-27 are more SPI commands. */
 	/* URB 28. Command Set SPI Voltage. */
 	if (dediprog_set_spi_voltage(0x0))
 		return 1;
 	/* URB 29-38. Command F, unsuccessful wait. */
 	if (dediprog_command_f(544))
 		return 1;
 	/* URB 39. Command Set SPI Voltage. */
 	if (dediprog_set_spi_voltage(0x10))
 		return 1;
 	/* URB 40. Command Set SPI Speed. */
 	if (dediprog_set_spi_speed(0x2))
 		return 1;
 	/* URB 41 is just URB 28. */
 	/* URB 42,44,46,48,51,53 is just URB 8. */
 	/* URB 43,45,47,49,52,54 is just URB 9. */
 	/* URB 50 is just URB 6/7. */
 	/* URB 55-131 is just URB 29-38. (wait unsuccessfully for 4695 (maybe 4751) ms)*/
 	/* URB 132,134 is just URB 6/7. */
 	/* URB 133 is just URB 29-38. */
 	/* URB 135 is just URB 8. */
 	/* URB 136 is just URB 9. */
 	/* URB 137 is just URB 11. */

 	/* Command I is probably Start Bulk Read. Data is u16 blockcount, u16 blocksize. */
 	/* Command J is probably Start Bulk Write. Data is u16 blockcount, u16 blocksize. */
 	/* Bulk transfer sizes for Command I/J are always 512 bytes, rest is filled with 0xff. */
 #endif

 	msg_pinfo("All probes will fail because this driver is not hooked up "
 		  "to the SPI infrastructure yet.");
 	return 0;
 }

 int dediprog_shutdown(void)
 {
 	msg_pspew("%s\n", __func__);

 	/* URB 28. Command Set SPI Voltage to 0. */
 	if (dediprog_set_spi_voltage(0x0))
 		return 1;

 	if (usb_close(dediprog_handle)) {
 		msg_perr("Couldn't close USB device!\n");
 		return 1;
 	}
 	return 0;
 }
	/*
	* This file is part of the flashrom project.
	*
	* Copyright (C) 2010 Carl-Daniel Hailfinger
	*
	* 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 of the License.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include <string.h>
	#include <usb.h>
	#include "flash.h"
	#include "chipdrivers.h"
	#include "spi.h"

	#define DEFAULT_TIMEOUT 3000
	usb_dev_handle *dediprog_handle;

	int dediprog_do_stuff(void);

	void print_hex(void *buf, size_t len)
	{
	size_t i;

	for (i = 0; i < len; i++)
	msg_pdbg(" %02x", ((uint8_t *)buf)[i]);
	}

	struct usb_device *get_device_by_vid_pid(uint16_t vid, uint16_t pid)
	{
	struct usb_bus *bus;
	struct usb_device *dev;

	for (bus = usb_get_busses(); bus; bus = bus->next)
	for (dev = bus->devices; dev; dev = dev->next)
	if ((dev->descriptor.idVendor == vid) &&
	(dev->descriptor.idProduct == pid))
	return dev;

	return NULL;
	}

	//int usb_control_msg(usb_dev_handle dev, int requesttype, int request, int value, int index, char bytes, int size, int timeout);

	int dediprog_set_spi_voltage(uint16_t voltage)
	{
	int ret;
	unsigned int mv;

	switch (voltage) {
	case 0x0:
	/* Admittedly this one is an assumption. */
	mv = 0;
	break;
	case 0x12:
	mv = 1800;
	break;
	case 0x11:
	mv = 2500;
	break;
	case 0x10:
	mv = 3500;
	break;
	default:
	msg_perr("Unknown voltage selector 0x%x! Aborting.\n", voltage);
	return 1;
	}
	msg_pdbg("Setting SPI voltage to %u.%03u V\n", mv / 1000, mv % 1000);

	ret = usb_control_msg(dediprog_handle, 0x42, 0x9, voltage, 0xff, NULL, 0x0, DEFAULT_TIMEOUT);
	if (ret != 0x0) {
	msg_perr("Command Set SPI Voltage 0x%x failed!\n", voltage);
	return 1;
	}
	return 0;
	}

	/* After dediprog_set_spi_speed, the original app always calls
	* dediprog_set_spi_voltage(0) and then
	* dediprog_check_devicestring() four times in a row.
	* After that, dediprog_command_a() is called.
	* This looks suspiciously like the microprocessor in the SF100 has to be
	* restarted/reinitialized in case the speed changes.
	*/
	int dediprog_set_spi_speed(uint16_t speed)
	{
	int ret;
	unsigned int khz;

	/* Case 1 and 2 are in weird order. Probably an organically "grown"
	* interface.
	* Base frequency is 24000 kHz, divisors are (in order)
	* 1, 3, 2, 8, 11, 16, 32, 64.
	*/
	switch (speed) {
	case 0x0:
	khz = 24000;
	break;
	case 0x1:
	khz = 8000;
	break;
	case 0x2:
	khz = 12000;
	break;
	case 0x3:
	khz = 3000;
	break;
	case 0x4:
	khz = 2180;
	break;
	case 0x5:
	khz = 1500;
	break;
	case 0x6:
	khz = 750;
	break;
	case 0x7:
	khz = 375;
	break;
	default:
	msg_perr("Unknown frequency selector 0x%x! Aborting.\n", speed);
	return 1;
	}
	msg_pdbg("Setting SPI speed to %u kHz\n", khz);

	ret = usb_control_msg(dediprog_handle, 0x42, 0x61, speed, 0xff, NULL, 0x0, DEFAULT_TIMEOUT);
	if (ret != 0x0) {
	msg_perr("Command Set SPI Speed 0x%x failed!\n", speed);
	return 1;
	}
	return 0;
	}

	int dediprog_spi_read(struct flashchip flash, uint8_t buf, int start, int len)
	{
	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);
	}

	int dediprog_spi_send_command(unsigned int writecnt, unsigned int readcnt,
	const unsigned char writearr, unsigned char readarr)
	{
	int ret;

	msg_pspew("%s, writecnt=%i, readcnt=%i\n", __func__, writecnt, readcnt);
	/* Paranoid, but I don't want to be blamed if anything explodes. */
	if (writecnt > 5) {
	msg_perr("Untested writecnt=%i, aborting.\n", writecnt);
	return 1;
	}
	/* 16 byte reads should work. */
	if (readcnt > 16) {
	msg_perr("Untested readcnt=%i, aborting.\n", readcnt);
	return 1;
	}

	ret = usb_control_msg(dediprog_handle, 0x42, 0x1, 0xff, readcnt ? 0x1 : 0x0, (char *)writearr, writecnt, DEFAULT_TIMEOUT);
	if (ret != writecnt) {
	msg_perr("Send SPI failed, expected %i, got %i %s!\n",
	writecnt, ret, usb_strerror());
	return 1;
	}
	if (!readcnt)
	return 0;
	memset(readarr, 0, readcnt);
	ret = usb_control_msg(dediprog_handle, 0xc2, 0x01, 0xbb8, 0x0000, (char *)readarr, readcnt, DEFAULT_TIMEOUT);
	if (ret != readcnt) {
	msg_perr("Receive SPI failed, expected %i, got %i %s!\n",
	readcnt, ret, usb_strerror());
	return 1;
	}
	return 0;
	}

	int dediprog_check_devicestring(void)
	{
	int ret;
	char buf[0x11];

	/* Command Prepare Receive Device String. */
	memset(buf, 0, sizeof(buf));
	ret = usb_control_msg(dediprog_handle, 0xc3, 0x7, 0x0, 0xef03, buf, 0x1, DEFAULT_TIMEOUT);
	/* The char casting is needed to stop gcc complaining about an always true comparison. */
	if ((ret != 0x1) \|\| (buf[0] != (char)0xff)) {
	msg_perr("Unexpected response to Command Prepare Receive Device"
	" String!\n");
	return 1;
	}
	/* Command Receive Device String. */
	memset(buf, 0, sizeof(buf));
	ret = usb_control_msg(dediprog_handle, 0xc2, 0x8, 0xff, 0xff, buf, 0x10, DEFAULT_TIMEOUT);
	if (ret != 0x10) {
	msg_perr("Incomplete/failed Command Receive Device String!\n");
	return 1;
	}
	buf[0x10] = '\0';
	msg_pdbg("Found a %s\n", buf);
	if (memcmp(buf, "SF100", 0x5)) {
	msg_perr("Device not a SF100!\n");
	return 1;
	}
	/* Only these versions were tested. */
	if (memcmp(buf, "SF100 V:2.1.1 ", 0x10) &&
	memcmp(buf, "SF100 V:3.1.8 ", 0x10)) {
	msg_perr("Unexpected firmware version!\n");
	return 1;
	}
	return 0;
	}

	/* Command A seems to be some sort of device init. It is either followed by
	* dediprog_check_devicestring (often) or Command A (often) or
	* Command F (once).
	*/
	int dediprog_command_a(void)
	{
	int ret;
	char buf[0x1];

	memset(buf, 0, sizeof(buf));
	ret = usb_control_msg(dediprog_handle, 0xc3, 0xb, 0x0, 0x0, buf, 0x1, DEFAULT_TIMEOUT);
	if ((ret != 0x1) \|\| (buf[0] != 0x6f)) {
	msg_perr("Unexpected response to Command A!\n");
	return 1;
	}
	return 0;
	}

	/* Command C is only sent after dediprog_check_devicestring, but not after every
	* invocation of dediprog_check_devicestring. It is only sent after the first
	* dediprog_command_a(); dediprog_check_devicestring() sequence in each session.
	* I'm tempted to call this one start_SPI_engine or finish_init.
	*/
	int dediprog_command_c(void)
	{
	int ret;

	ret = usb_control_msg(dediprog_handle, 0x42, 0x4, 0x0, 0x0, NULL, 0x0, DEFAULT_TIMEOUT);
	if (ret != 0x0) {
	msg_perr("Unexpected response to Command C!\n");
	return 1;
	}
	return 0;
	}

	/* Very strange. Seems to be a programmer keepalive or somesuch.
	* Wait unsuccessfully for timeout ms to read one byte.
	* Is usually called after setting voltage to 0.
	*/
	int dediprog_command_f(int timeout)
	{
	int ret;
	char buf[0x1];

	memset(buf, 0, sizeof(buf));
	ret = usb_control_msg(dediprog_handle, 0xc2, 0x11, 0xff, 0xff, buf, 0x1, timeout);
	if (ret != 0x0) {
	msg_perr("Unexpected response to Command F!\n");
	return 1;
	}
	return 0;
	}

	/* URB numbers refer to the first log ever captured. */
	int dediprog_init(void)
	{
	struct usb_device *dev;

	msg_pspew("%s\n", __func__);

	/* Here comes the USB stuff. */
	usb_init();
	usb_find_busses();
	usb_find_devices();
	dev = get_device_by_vid_pid(0x0483, 0xdada);
	if (!dev) {
	msg_perr("Could not find a Dediprog SF100 on USB!\n");
	return 1;
	}
	msg_pdbg("Found USB device (%04x:%04x).\n",
	dev->descriptor.idVendor,
	dev->descriptor.idProduct);
	dediprog_handle = usb_open(dev);
	usb_set_configuration(dediprog_handle, 1);
	usb_claim_interface(dediprog_handle, 0);
	/* URB 6. Command A. */
	if (dediprog_command_a())
	return 1;
	/* URB 7. Command A. */
	if (dediprog_command_a())
	return 1;
	/* URB 8. Command Prepare Receive Device String. */
	/* URB 9. Command Receive Device String. */
	if (dediprog_check_devicestring())
	return 1;
	/* URB 10. Command C. */
	if (dediprog_command_c())
	return 1;
	/* URB 11. Command Set SPI Voltage. */
	if (dediprog_set_spi_voltage(0x10))
	return 1;

	buses_supported = CHIP_BUSTYPE_SPI;
	spi_controller = SPI_CONTROLLER_DEDIPROG;

	/* RE leftover, leave in until the driver is complete. */
	#if 0
	/* Execute RDID by hand if you want to test it. */
	dediprog_do_stuff();
	#endif

	return 0;
	}

	/* Leftovers from reverse engineering. Keep for documentation purposes until
	* completely understood.
	*/
	int dediprog_do_stuff(void)
	{
	char buf[0x4];
	/* SPI command processing starts here. */

	/* URB 12. Command Send SPI. */
	/* URB 13. Command Receive SPI. */
	memset(buf, 0, sizeof(buf));
	/* JEDEC RDID */
	msg_pdbg("Sending RDID\n");
	buf[0] = JEDEC_RDID;
	if (dediprog_spi_send_command(JEDEC_RDID_OUTSIZE, JEDEC_RDID_INSIZE, (unsigned char )buf, (unsigned char )buf))
	return 1;
	msg_pdbg("Receiving response: ");
	print_hex(buf, JEDEC_RDID_INSIZE);
	#if 0
	/* URB 14-27 are more SPI commands. */
	/* URB 28. Command Set SPI Voltage. */
	if (dediprog_set_spi_voltage(0x0))
	return 1;
	/* URB 29-38. Command F, unsuccessful wait. */
	if (dediprog_command_f(544))
	return 1;
	/* URB 39. Command Set SPI Voltage. */
	if (dediprog_set_spi_voltage(0x10))
	return 1;
	/* URB 40. Command Set SPI Speed. */
	if (dediprog_set_spi_speed(0x2))
	return 1;
	/* URB 41 is just URB 28. */
	/* URB 42,44,46,48,51,53 is just URB 8. */
	/* URB 43,45,47,49,52,54 is just URB 9. */
	/* URB 50 is just URB 6/7. */
	/* URB 55-131 is just URB 29-38. (wait unsuccessfully for 4695 (maybe 4751) ms)*/
	/* URB 132,134 is just URB 6/7. */
	/* URB 133 is just URB 29-38. */
	/* URB 135 is just URB 8. */
	/* URB 136 is just URB 9. */
	/* URB 137 is just URB 11. */

	/* Command I is probably Start Bulk Read. Data is u16 blockcount, u16 blocksize. */
	/* Command J is probably Start Bulk Write. Data is u16 blockcount, u16 blocksize. */
	/* Bulk transfer sizes for Command I/J are always 512 bytes, rest is filled with 0xff. */
	#endif

	msg_pinfo("All probes will fail because this driver is not hooked up "
	"to the SPI infrastructure yet.");
	return 0;
	}

	int dediprog_shutdown(void)
	{
	msg_pspew("%s\n", __func__);

	/* URB 28. Command Set SPI Voltage to 0. */
	if (dediprog_set_spi_voltage(0x0))
	return 1;

	if (usb_close(dediprog_handle)) {
	msg_perr("Couldn't close USB device!\n");
	return 1;
	}
	return 0;
	}