[hmcfgusb] / hmcfgusb.c

/* HM-CFG-USB libusb-driver
 *
 * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <math.h>
#include <poll.h>
#include <errno.h>
#include <sys/time.h>
#include <libusb-1.0/libusb.h>

/* Workaround for old libusb-1.0 */
#ifndef LIBUSB_CALL
#define LIBUSB_CALL
#define libusb_handle_events_timeout_completed(ctx, tv, x) libusb_handle_events_timeout(ctx, tv)
#endif

#include "hexdump.h"
#include "hmcfgusb.h"

#define USB_TIMEOUT	10000

#define ID_VENDOR	0x1b1f
#define ID_PRODUCT	0xc00f
#define ID_PRODUCT_BL	0xc010

/* TODO: dynamic */
#define ASYNC_SIZE	0x0040
#define ASYNC_INTERVAL	32

#define EP_OUT		0x02
#define EP_IN		0x83

#define INTERFACE	0

static int quit = 0;
static int debug = 0;

/* Not in all libusb-1.0 versions, so we have to roll our own :-( */
static char * usb_strerror(int e)
{
	static char unknerr[256];

	switch (e) {
		case LIBUSB_SUCCESS:
			return "Success";
		case LIBUSB_ERROR_IO:
			return "Input/output error";
		case LIBUSB_ERROR_INVALID_PARAM:
			return "Invalid parameter";
		case LIBUSB_ERROR_ACCESS:
			return "Access denied (insufficient permissions)";
		case LIBUSB_ERROR_NO_DEVICE:
			return "No such device (it may have been disconnected)";
		case LIBUSB_ERROR_NOT_FOUND:
			return "Entity not found";
		case LIBUSB_ERROR_BUSY:
			return "Resource busy";
		case LIBUSB_ERROR_TIMEOUT:
			return "Operation timed out";
		case LIBUSB_ERROR_OVERFLOW:
			return "Overflow";
		case LIBUSB_ERROR_PIPE:
			return "Pipe error";
		case LIBUSB_ERROR_INTERRUPTED:
			return "System call interrupted (perhaps due to signal)";
		case LIBUSB_ERROR_NO_MEM:
			return "Insufficient memory";
		case LIBUSB_ERROR_NOT_SUPPORTED:
			return "Operation not supported or unimplemented on this platform";
		case LIBUSB_ERROR_OTHER:
			return "Other error";
	};
	snprintf(unknerr, sizeof(unknerr), "Unknown error code %d / 0x%02x", e, e);
	return unknerr;
}

static libusb_device_handle *hmcfgusb_find(int vid, int pid) {
	libusb_device_handle *devh = NULL;
	libusb_device **list;
	ssize_t cnt;
	ssize_t i;
	int err;

	cnt = libusb_get_device_list(NULL, &list);
	if (cnt < 0) {
		fprintf(stderr, "Can't get USB device list: %d\n", (int)cnt);
		return NULL;
	}

	for (i = 0; i < cnt; i++){
		struct libusb_device_descriptor desc;

		err = libusb_get_device_descriptor(list[i], &desc);
		if (err)
			continue;

		if ((desc.idVendor == vid) && (desc.idProduct == pid)) {
			libusb_device *dev = list[i];

			err = libusb_open(dev, &devh);
			if (err) {
				fprintf(stderr, "Can't open device: %s\n", usb_strerror(err));
				return NULL;
			}

			err = libusb_detach_kernel_driver(devh, INTERFACE);
			if ((err != 0) && (err != LIBUSB_ERROR_NOT_FOUND)) {
				fprintf(stderr, "Can't detach kernel driver: %s\n", usb_strerror(err));
				return NULL;
			}

			err = libusb_claim_interface(devh, INTERFACE);
			if ((err != 0)) {
				fprintf(stderr, "Can't claim interface: %s\n", usb_strerror(err));
				return NULL;
			}

			return devh;
		}

	}

	return NULL;
}

int hmcfgusb_send_null_frame(struct hmcfgusb_dev *usbdev, int silent)
{
	int err;
	int cnt;
	unsigned char out[0x40];

	memset(out, 0, sizeof(out));

	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, out, 0, &cnt, USB_TIMEOUT);
	if (err && (!silent)) {
		fprintf(stderr, "Can't send null frame: %s\n", usb_strerror(err));
		return 0;
	}

	return 1;
}

int hmcfgusb_send(struct hmcfgusb_dev *usbdev, unsigned char* send_data, int len, int done)
{
	int err;
	int cnt;
	struct timeval tv_start, tv_end;
	int msec;

	if (debug) {
		hexdump(send_data, len, "USB < ");
	}

	gettimeofday(&tv_start, NULL);

	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, send_data, len, &cnt, USB_TIMEOUT);
	if (err) {
		fprintf(stderr, "Can't send data: %s\n", usb_strerror(err));
		return 0;
	}

	if (done) {
		if (!hmcfgusb_send_null_frame(usbdev, 0)) {
			return 0;
		}
	}

	gettimeofday(&tv_end, NULL);
	msec = ((tv_end.tv_sec-tv_start.tv_sec)*1000)+((tv_end.tv_usec-tv_start.tv_usec)/1000);

	if (msec > 100) {
		fprintf(stderr, "usb-transfer took more than 100ms (%dms), this may lead to timing problems!\n", msec);
	} else if (debug) {
		fprintf(stderr, "usb-transfer took %dms!\n", msec);
	}

	return 1;
}

static struct libusb_transfer *hmcfgusb_prepare_int(libusb_device_handle *devh, libusb_transfer_cb_fn cb, void *data, int in_size)
{
	unsigned char *data_buf;
	struct libusb_transfer *transfer;
	int err;

	data_buf = malloc(in_size);
	if (!data_buf) {
		fprintf(stderr, "Can't allocate memory for data-buffer!\n");
		return NULL;
	}

	transfer = libusb_alloc_transfer(0);
	if (!transfer) {
		fprintf(stderr, "Can't allocate memory for usb-transfer!\n");
		free(data_buf);
		return NULL;
	}

	libusb_fill_interrupt_transfer(transfer, devh, EP_IN,
			data_buf, in_size, cb, data, USB_TIMEOUT);

	transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER;

	err = libusb_submit_transfer(transfer);
	if (err != 0) {
		fprintf(stderr, "Can't submit transfer: %s\n", usb_strerror(err));
		libusb_free_transfer(transfer);
		return NULL;
	}

	return transfer;
}

struct hmcfgusb_cb_data {
	struct hmcfgusb_dev *dev;
	hmcfgusb_cb_fn cb;
	void *data;
};

static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
{
	int err;
	struct hmcfgusb_cb_data *cb_data;

	cb_data = transfer->user_data;

	if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
		if (transfer->status != LIBUSB_TRANSFER_TIMED_OUT) {
			fprintf(stderr, "Interrupt transfer not completed: %s!\n", usb_strerror(transfer->status));
			quit = EIO;

			if (cb_data && cb_data->dev && cb_data->dev->transfer) {
				libusb_free_transfer(cb_data->dev->transfer);
				cb_data->dev->transfer = NULL;
				free(cb_data);
			}
			return;
		}
	} else {
		if (cb_data && cb_data->cb) {
			if (debug)
				hexdump(transfer->buffer, transfer->actual_length, "USB > ");

			if (!cb_data->cb(transfer->buffer, transfer->actual_length, cb_data->data)) {
				quit = EIO;

				if (cb_data && cb_data->dev && cb_data->dev->transfer) {
					libusb_free_transfer(cb_data->dev->transfer);
					cb_data->dev->transfer = NULL;
					free(cb_data);
				}

				return;
			}
		} else {
			hexdump(transfer->buffer, transfer->actual_length, "> ");
		}
	}

	err = libusb_submit_transfer(transfer);
	if (err != 0) {
		fprintf(stderr, "Can't re-submit transfer: %s\n", usb_strerror(err));
		libusb_free_transfer(transfer);
		if (cb_data) {
			if (cb_data->dev)
				cb_data->dev->transfer = NULL;
			free(cb_data);
		}
	}
}

struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
{
	libusb_device_handle *devh = NULL;
	const struct libusb_pollfd **usb_pfd = NULL;
	struct hmcfgusb_dev *dev = NULL;
	struct hmcfgusb_cb_data *cb_data = NULL;
	int bootloader = 0;
	int err;
	int i;

	err = libusb_init(NULL);
	if (err != 0) {
		fprintf(stderr, "Can't initialize libusb: %s\n", usb_strerror(err));
		return NULL;
	}

	devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT);
	if (!devh) {
		devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT_BL);
		if (!devh) {
			fprintf(stderr, "Can't find/open hmcfgusb!\n");
			libusb_exit(NULL);
			return NULL;
		}
		bootloader = 1;
	}

	dev = malloc(sizeof(struct hmcfgusb_dev));
	if (!dev) {
		perror("Can't allocate memory for hmcfgusb_dev");
		libusb_close(devh);
		libusb_exit(NULL);
		return NULL;
	}

	memset(dev, 0, sizeof(struct hmcfgusb_dev));
	dev->usb_devh = devh;
	dev->bootloader = bootloader;
	dev->opened_at = time(NULL);

	cb_data = malloc(sizeof(struct hmcfgusb_cb_data));
	if (!cb_data) {
		perror("Can't allocate memory for hmcfgusb_cb_data");
		free(dev);
		libusb_close(devh);
		libusb_exit(NULL);
		return NULL;
	}

	memset(cb_data, 0, sizeof(struct hmcfgusb_cb_data));

	cb_data->dev = dev;
	cb_data->cb = cb;
	cb_data->data = data;

	dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data, ASYNC_SIZE);

	if (!dev->transfer) {
		fprintf(stderr, "Can't prepare async device io!\n");
		free(dev);
		free(cb_data);
		libusb_close(devh);
		libusb_exit(NULL);
		return NULL;
	}

	usb_pfd = libusb_get_pollfds(NULL);
	if (!usb_pfd) {
		fprintf(stderr, "Can't get FDset from libusb!\n");
		free(dev);
		free(cb_data);
		libusb_close(devh);
		libusb_exit(NULL);
		return NULL;
	}

	dev->n_usb_pfd = 0;
	for(i = 0; usb_pfd[i]; i++)
		dev->n_usb_pfd++;

	dev->pfd = malloc(dev->n_usb_pfd * sizeof(struct pollfd));
	if (!dev->pfd) {
		perror("Can't allocate memory for poll-fds");
		free(dev);
		free(cb_data);
		libusb_close(devh);
		libusb_exit(NULL);
		return NULL;
	}

	memset(dev->pfd, 0, dev->n_usb_pfd * sizeof(struct pollfd));

	for (i = 0; i < dev->n_usb_pfd; i++) {
		dev->pfd[i].fd = usb_pfd[i]->fd;
		dev->pfd[i].events = usb_pfd[i]->events;
		dev->pfd[i].revents = 0;
	}

	free(usb_pfd);

	dev->n_pfd = dev->n_usb_pfd;

	quit = 0;

	return dev;
}

int hmcfgusb_add_pfd(struct hmcfgusb_dev *dev, int fd, short events)
{
	dev->n_pfd++;
	dev->pfd = realloc(dev->pfd, dev->n_pfd * sizeof(struct pollfd));
	if (!dev->pfd) {
		perror("Can't realloc poll-fds");
		return 0;
	}

	dev->pfd[dev->n_pfd-1].fd = fd;
	dev->pfd[dev->n_pfd-1].events = events;
	dev->pfd[dev->n_pfd-1].revents = 0;

	return 1;
}

int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
{
	struct timeval tv;
	int usb_event = 0;
	int timed_out = 0;
	int i;
	int n;
	int fd_n;
	int err;

	errno = 0;

	memset(&tv, 0, sizeof(tv));
	err = libusb_get_next_timeout(NULL, &tv);
	if (err < 0) {
		fprintf(stderr, "libusb_get_next_timeout: %s\n", usb_strerror(err));
		errno = EIO;
		return -1;
	} else if (err == 0) {
		/* No pending timeout or a sane platform */
	} else {
		if ((tv.tv_sec == 0) && (tv.tv_usec == 0)) {
			usb_event = 1;
		} else if ((tv.tv_sec * 1000) < timeout) {
			timeout = tv.tv_sec * 1000;
		}
	}

	if (!usb_event) {
		for (i = 0; i < dev->n_pfd; i++) {
			dev->pfd[i].revents = 0;
		}

		n = poll(dev->pfd, dev->n_pfd, timeout);
		if (n < 0) {
			perror("poll");
			errno = 0;
			return -1;
		} else if (n == 0) {
			usb_event = 1;
			timed_out = 1;
		} else {
			for (fd_n = 0; fd_n < dev->n_pfd; fd_n++) {
				if (dev->pfd[fd_n].revents) {
					if (fd_n < dev->n_usb_pfd) {
						usb_event = 1;
						break;
					} else {
						errno = 0;
						return dev->pfd[fd_n].fd;
					}
				}
			}
		}
	}

	if (usb_event) {
		memset(&tv, 0, sizeof(tv));
		err = libusb_handle_events_timeout_completed(NULL, &tv, NULL);
		if (err < 0) {
			fprintf(stderr, "libusb_handle_events_timeout_completed: %s\n", usb_strerror(err));
			errno = EIO;
			return -1;
		}
	}

	errno = 0;
	if (quit) {
		fprintf(stderr, "closing device-connection due to error %d\n", quit);
		errno = quit;
	}

	if (timed_out)
		errno = ETIMEDOUT;

	return -1;
}

void hmcfgusb_enter_bootloader(struct hmcfgusb_dev *dev)
{
	uint8_t out[ASYNC_SIZE];

	if (dev->bootloader) {
		fprintf(stderr, "request for bootloader mode, but device already in bootloader!\n");
		return;
	}

	memset(out, 0, sizeof(out));
	out[0] = 'B';
	hmcfgusb_send(dev, out, sizeof(out), 1);

	return;
}

void hmcfgusb_leave_bootloader(struct hmcfgusb_dev *dev)
{
	uint8_t out[ASYNC_SIZE];

	if (!dev->bootloader) {
		fprintf(stderr, "request for leaving bootloader mode, but device already in normal mode!\n");
		return;
	}

	memset(out, 0, sizeof(out));
	out[0] = 'K';
	hmcfgusb_send(dev, out, sizeof(out), 1);

	return;
}

void hmcfgusb_close(struct hmcfgusb_dev *dev)
{
	int err;

	if (dev->transfer) {
		libusb_cancel_transfer(dev->transfer);
	}

	err = libusb_release_interface(dev->usb_devh, INTERFACE);
	if ((err != 0)) {
		fprintf(stderr, "Can't release interface: %s\n", usb_strerror(err));
	}

	libusb_close(dev->usb_devh);
	free(dev->pfd);
	free(dev);

	libusb_exit(NULL);
}

void hmcfgusb_set_debug(int d)
{
	debug = d;
}
Commit	Line	Data
9db2e455 MG	1	/* HM-CFG-USB libusb-driver
	2	*
	3	* Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a copy
	6	* of this software and associated documentation files (the "Software"), to
	7	* deal in the Software without restriction, including without limitation the
	8	* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
	9	* sell copies of the Software, and to permit persons to whom the Software is
	10	* furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice shall be included in
	13	* all copies or substantial portions of the Software.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	16	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	18	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	20	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	21	* IN THE SOFTWARE.
	22	*/
	23
	24	#include <string.h>
	25	#include <stdio.h>
	26	#include <stdint.h>
	27	#include <unistd.h>
	28	#include <stdlib.h>
	29	#include <math.h>
	30	#include <poll.h>
	31	#include <errno.h>
f8718b41	32	#include <sys/time.h>
9db2e455 MG	33	#include <libusb-1.0/libusb.h>
9db2e455 MG	34
37c97e62 MG	35	/* Workaround for old libusb-1.0 */
	36	#ifndef LIBUSB_CALL
	37	#define LIBUSB_CALL
	38	#define libusb_handle_events_timeout_completed(ctx, tv, x) libusb_handle_events_timeout(ctx, tv)
	39	#endif
	40
9db2e455 MG	41	#include "hexdump.h"
	42	#include "hmcfgusb.h"
	43
813afd12	44	#define USB_TIMEOUT 10000
9db2e455 MG	45
	46	#define ID_VENDOR 0x1b1f
	47	#define ID_PRODUCT 0xc00f
4d0be794	48	#define ID_PRODUCT_BL 0xc010
9db2e455 MG	49
	50	/* TODO: dynamic */
	51	#define ASYNC_SIZE 0x0040
	52	#define ASYNC_INTERVAL 32
	53
	54	#define EP_OUT 0x02
	55	#define EP_IN 0x83
	56
813afd12 MG	57	#define INTERFACE 0
813afd12 MG	58
9db2e455	59	static int quit = 0;
e75295bb	60	static int debug = 0;
9db2e455 MG	61
	62	/* Not in all libusb-1.0 versions, so we have to roll our own :-( */
	63	static char * usb_strerror(int e)
	64	{
	65	static char unknerr[256];
	66
	67	switch (e) {
	68	case LIBUSB_SUCCESS:
	69	return "Success";
	70	case LIBUSB_ERROR_IO:
	71	return "Input/output error";
	72	case LIBUSB_ERROR_INVALID_PARAM:
	73	return "Invalid parameter";
	74	case LIBUSB_ERROR_ACCESS:
	75	return "Access denied (insufficient permissions)";
	76	case LIBUSB_ERROR_NO_DEVICE:
	77	return "No such device (it may have been disconnected)";
	78	case LIBUSB_ERROR_NOT_FOUND:
	79	return "Entity not found";
	80	case LIBUSB_ERROR_BUSY:
	81	return "Resource busy";
	82	case LIBUSB_ERROR_TIMEOUT:
	83	return "Operation timed out";
	84	case LIBUSB_ERROR_OVERFLOW:
	85	return "Overflow";
	86	case LIBUSB_ERROR_PIPE:
	87	return "Pipe error";
	88	case LIBUSB_ERROR_INTERRUPTED:
	89	return "System call interrupted (perhaps due to signal)";
	90	case LIBUSB_ERROR_NO_MEM:
	91	return "Insufficient memory";
	92	case LIBUSB_ERROR_NOT_SUPPORTED:
	93	return "Operation not supported or unimplemented on this platform";
	94	case LIBUSB_ERROR_OTHER:
	95	return "Other error";
	96	};
	97	snprintf(unknerr, sizeof(unknerr), "Unknown error code %d / 0x%02x", e, e);
	98	return unknerr;
	99	}
	100
62f25bae	101	static libusb_device_handle *hmcfgusb_find(int vid, int pid) {
9db2e455 MG	102	libusb_device_handle *devh = NULL;
	103	libusb_device **list;
	104	ssize_t cnt;
	105	ssize_t i;
	106	int err;
	107
	108	cnt = libusb_get_device_list(NULL, &list);
	109	if (cnt < 0) {
	110	fprintf(stderr, "Can't get USB device list: %d\n", (int)cnt);
	111	return NULL;
	112	}
	113
	114	for (i = 0; i < cnt; i++){
	115	struct libusb_device_descriptor desc;
	116
	117	err = libusb_get_device_descriptor(list[i], &desc);
	118	if (err)
	119	continue;
	120
62f25bae	121	if ((desc.idVendor == vid) && (desc.idProduct == pid)) {
9db2e455 MG	122	libusb_device *dev = list[i];
	123
	124	err = libusb_open(dev, &devh);
	125	if (err) {
	126	fprintf(stderr, "Can't open device: %s\n", usb_strerror(err));
	127	return NULL;
	128	}
	129
813afd12	130	err = libusb_detach_kernel_driver(devh, INTERFACE);
9db2e455 MG	131	if ((err != 0) && (err != LIBUSB_ERROR_NOT_FOUND)) {
	132	fprintf(stderr, "Can't detach kernel driver: %s\n", usb_strerror(err));
	133	return NULL;
	134	}
	135
813afd12	136	err = libusb_claim_interface(devh, INTERFACE);
9db2e455 MG	137	if ((err != 0)) {
	138	fprintf(stderr, "Can't claim interface: %s\n", usb_strerror(err));
	139	return NULL;
	140	}
	141
	142	return devh;
	143	}
	144
	145	}
	146
	147	return NULL;
	148	}
	149
6262005e	150	int hmcfgusb_send_null_frame(struct hmcfgusb_dev *usbdev, int silent)
2a6eaefc MG	151	{
	152	int err;
	153	int cnt;
3435bdb6	154	unsigned char out[0x40];
2a6eaefc	155
3435bdb6 MG	156	memset(out, 0, sizeof(out));
3435bdb6 MG	157
3d5b8e70	158	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, out, 0, &cnt, USB_TIMEOUT);
6262005e MG	159	if (err && (!silent)) {
6262005e MG	160	fprintf(stderr, "Can't send null frame: %s\n", usb_strerror(err));
2a6eaefc MG	161	return 0;
	162	}
	163
	164	return 1;
	165	}
	166
9db2e455 MG	167	int hmcfgusb_send(struct hmcfgusb_dev usbdev, unsigned char send_data, int len, int done)
	168	{
	169	int err;
	170	int cnt;
f8718b41 MG	171	struct timeval tv_start, tv_end;
f8718b41 MG	172	int msec;
9db2e455	173
f8718b41	174	if (debug) {
627e3f33	175	hexdump(send_data, len, "USB < ");
f8718b41 MG	176	}
f8718b41 MG	177
d200d8ca MG	178	gettimeofday(&tv_start, NULL);
d200d8ca MG	179
9db2e455 MG	180	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, send_data, len, &cnt, USB_TIMEOUT);
	181	if (err) {
	182	fprintf(stderr, "Can't send data: %s\n", usb_strerror(err));
9db2e455 MG	183	return 0;
	184	}
	185
	186	if (done) {
6262005e	187	if (!hmcfgusb_send_null_frame(usbdev, 0)) {
9db2e455 MG	188	return 0;
	189	}
	190	}
	191
d200d8ca MG	192	gettimeofday(&tv_end, NULL);
	193	msec = ((tv_end.tv_sec-tv_start.tv_sec)*1000)+((tv_end.tv_usec-tv_start.tv_usec)/1000);
	194
	195	if (msec > 100) {
6df7655e	196	fprintf(stderr, "usb-transfer took more than 100ms (%dms), this may lead to timing problems!\n", msec);
d200d8ca MG	197	} else if (debug) {
d200d8ca MG	198	fprintf(stderr, "usb-transfer took %dms!\n", msec);
f8718b41 MG	199	}
f8718b41 MG	200
e0a7146e	201	return 1;
9db2e455 MG	202	}
9db2e455 MG	203
b5e57d26	204	static struct libusb_transfer hmcfgusb_prepare_int(libusb_device_handle devh, libusb_transfer_cb_fn cb, void *data, int in_size)
9db2e455 MG	205	{
	206	unsigned char *data_buf;
	207	struct libusb_transfer *transfer;
	208	int err;
	209
b5e57d26	210	data_buf = malloc(in_size);
9db2e455 MG	211	if (!data_buf) {
	212	fprintf(stderr, "Can't allocate memory for data-buffer!\n");
	213	return NULL;
	214	}
	215
	216	transfer = libusb_alloc_transfer(0);
	217	if (!transfer) {
	218	fprintf(stderr, "Can't allocate memory for usb-transfer!\n");
	219	free(data_buf);
	220	return NULL;
	221	}
	222
	223	libusb_fill_interrupt_transfer(transfer, devh, EP_IN,
b5e57d26	224	data_buf, in_size, cb, data, USB_TIMEOUT);
9db2e455	225
bafd75c9	226	transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER;
9db2e455 MG	227
	228	err = libusb_submit_transfer(transfer);
	229	if (err != 0) {
	230	fprintf(stderr, "Can't submit transfer: %s\n", usb_strerror(err));
	231	libusb_free_transfer(transfer);
9db2e455 MG	232	return NULL;
	233	}
	234
	235	return transfer;
	236	}
	237
	238	struct hmcfgusb_cb_data {
813afd12	239	struct hmcfgusb_dev *dev;
9db2e455 MG	240	hmcfgusb_cb_fn cb;
	241	void *data;
	242	};
	243
	244	static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
	245	{
	246	int err;
	247	struct hmcfgusb_cb_data *cb_data;
	248
813afd12 MG	249	cb_data = transfer->user_data;
813afd12 MG	250
9db2e455 MG	251	if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
9db2e455 MG	252	if (transfer->status != LIBUSB_TRANSFER_TIMED_OUT) {
032d6050	253	fprintf(stderr, "Interrupt transfer not completed: %s!\n", usb_strerror(transfer->status));
9db2e455	254	quit = EIO;
813afd12 MG	255
	256	if (cb_data && cb_data->dev && cb_data->dev->transfer) {
	257	libusb_free_transfer(cb_data->dev->transfer);
	258	cb_data->dev->transfer = NULL;
4cadd56d	259	free(cb_data);
813afd12	260	}
9db2e455 MG	261	return;
9db2e455 MG	262	}
9db2e455	263	} else {
27bb301b	264	if (cb_data && cb_data->cb) {
e0a7146e	265	if (debug)
627e3f33	266	hexdump(transfer->buffer, transfer->actual_length, "USB > ");
4371275b MG	267
	268	if (!cb_data->cb(transfer->buffer, transfer->actual_length, cb_data->data)) {
	269	quit = EIO;
	270
	271	if (cb_data && cb_data->dev && cb_data->dev->transfer) {
	272	libusb_free_transfer(cb_data->dev->transfer);
	273	cb_data->dev->transfer = NULL;
4cadd56d	274	free(cb_data);
4371275b MG	275	}
	276
	277	return;
	278	}
27bb301b	279	} else {
e0a7146e	280	hexdump(transfer->buffer, transfer->actual_length, "> ");
27bb301b	281	}
9db2e455 MG	282	}
	283
	284	err = libusb_submit_transfer(transfer);
	285	if (err != 0) {
	286	fprintf(stderr, "Can't re-submit transfer: %s\n", usb_strerror(err));
9db2e455	287	libusb_free_transfer(transfer);
325ed703 MG	288	if (cb_data) {
	289	if (cb_data->dev)
	290	cb_data->dev->transfer = NULL;
	291	free(cb_data);
	292	}
9db2e455 MG	293	}
	294	}
	295
	296	struct hmcfgusb_dev hmcfgusb_init(hmcfgusb_cb_fn cb, void data)
	297	{
	298	libusb_device_handle *devh = NULL;
	299	const struct libusb_pollfd **usb_pfd = NULL;
	300	struct hmcfgusb_dev *dev = NULL;
	301	struct hmcfgusb_cb_data *cb_data = NULL;
62f25bae	302	int bootloader = 0;
9db2e455 MG	303	int err;
	304	int i;
	305
	306	err = libusb_init(NULL);
	307	if (err != 0) {
	308	fprintf(stderr, "Can't initialize libusb: %s\n", usb_strerror(err));
	309	return NULL;
	310	}
	311
62f25bae	312	devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT);
9db2e455	313	if (!devh) {
62f25bae MG	314	devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT_BL);
	315	if (!devh) {
	316	fprintf(stderr, "Can't find/open hmcfgusb!\n");
211fd7e5	317	libusb_exit(NULL);
62f25bae MG	318	return NULL;
	319	}
	320	bootloader = 1;
9db2e455 MG	321	}
	322
	323	dev = malloc(sizeof(struct hmcfgusb_dev));
	324	if (!dev) {
	325	perror("Can't allocate memory for hmcfgusb_dev");
211fd7e5 MG	326	libusb_close(devh);
211fd7e5 MG	327	libusb_exit(NULL);
9db2e455 MG	328	return NULL;
	329	}
	330
	331	memset(dev, 0, sizeof(struct hmcfgusb_dev));
	332	dev->usb_devh = devh;
62f25bae MG	333	dev->bootloader = bootloader;
62f25bae MG	334	dev->opened_at = time(NULL);
9db2e455 MG	335
	336	cb_data = malloc(sizeof(struct hmcfgusb_cb_data));
	337	if (!cb_data) {
	338	perror("Can't allocate memory for hmcfgusb_cb_data");
4cadd56d	339	free(dev);
211fd7e5 MG	340	libusb_close(devh);
211fd7e5 MG	341	libusb_exit(NULL);
9db2e455 MG	342	return NULL;
	343	}
	344
	345	memset(cb_data, 0, sizeof(struct hmcfgusb_cb_data));
	346
813afd12	347	cb_data->dev = dev;
9db2e455 MG	348	cb_data->cb = cb;
	349	cb_data->data = data;
	350
bafd75c9	351	dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data, ASYNC_SIZE);
b5e57d26	352
9db2e455 MG	353	if (!dev->transfer) {
9db2e455 MG	354	fprintf(stderr, "Can't prepare async device io!\n");
4cadd56d MG	355	free(dev);
4cadd56d MG	356	free(cb_data);
211fd7e5 MG	357	libusb_close(devh);
211fd7e5 MG	358	libusb_exit(NULL);
9db2e455 MG	359	return NULL;
	360	}
	361
	362	usb_pfd = libusb_get_pollfds(NULL);
	363	if (!usb_pfd) {
	364	fprintf(stderr, "Can't get FDset from libusb!\n");
	365	free(dev);
4cadd56d	366	free(cb_data);
211fd7e5 MG	367	libusb_close(devh);
211fd7e5 MG	368	libusb_exit(NULL);
9db2e455 MG	369	return NULL;
	370	}
	371
	372	dev->n_usb_pfd = 0;
	373	for(i = 0; usb_pfd[i]; i++)
	374	dev->n_usb_pfd++;
	375
	376	dev->pfd = malloc(dev->n_usb_pfd * sizeof(struct pollfd));
	377	if (!dev->pfd) {
	378	perror("Can't allocate memory for poll-fds");
4cadd56d MG	379	free(dev);
4cadd56d MG	380	free(cb_data);
211fd7e5 MG	381	libusb_close(devh);
211fd7e5 MG	382	libusb_exit(NULL);
9db2e455 MG	383	return NULL;
	384	}
	385
	386	memset(dev->pfd, 0, dev->n_usb_pfd * sizeof(struct pollfd));
	387
	388	for (i = 0; i < dev->n_usb_pfd; i++) {
	389	dev->pfd[i].fd = usb_pfd[i]->fd;
	390	dev->pfd[i].events = usb_pfd[i]->events;
	391	dev->pfd[i].revents = 0;
	392	}
	393
	394	free(usb_pfd);
	395
	396	dev->n_pfd = dev->n_usb_pfd;
	397
f16395da MG	398	quit = 0;
f16395da MG	399
9db2e455 MG	400	return dev;
	401	}
	402
	403	int hmcfgusb_add_pfd(struct hmcfgusb_dev *dev, int fd, short events)
	404	{
	405	dev->n_pfd++;
	406	dev->pfd = realloc(dev->pfd, dev->n_pfd * sizeof(struct pollfd));
	407	if (!dev->pfd) {
	408	perror("Can't realloc poll-fds");
	409	return 0;
	410	}
	411
	412	dev->pfd[dev->n_pfd-1].fd = fd;
	413	dev->pfd[dev->n_pfd-1].events = events;
	414	dev->pfd[dev->n_pfd-1].revents = 0;
	415
	416	return 1;
	417	}
	418
	419	int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
	420	{
	421	struct timeval tv;
	422	int usb_event = 0;
1e79d00a	423	int timed_out = 0;
9db2e455 MG	424	int i;
	425	int n;
	426	int fd_n;
	427	int err;
	428
	429	errno = 0;
	430
	431	memset(&tv, 0, sizeof(tv));
	432	err = libusb_get_next_timeout(NULL, &tv);
	433	if (err < 0) {
	434	fprintf(stderr, "libusb_get_next_timeout: %s\n", usb_strerror(err));
	435	errno = EIO;
	436	return -1;
	437	} else if (err == 0) {
	438	/* No pending timeout or a sane platform */
9db2e455 MG	439	} else {
	440	if ((tv.tv_sec == 0) && (tv.tv_usec == 0)) {
	441	usb_event = 1;
3b35a8c1 MG	442	} else if ((tv.tv_sec * 1000) < timeout) {
3b35a8c1 MG	443	timeout = tv.tv_sec * 1000;
9db2e455 MG	444	}
	445	}
	446
	447	if (!usb_event) {
	448	for (i = 0; i < dev->n_pfd; i++) {
	449	dev->pfd[i].revents = 0;
	450	}
	451
3b35a8c1	452	n = poll(dev->pfd, dev->n_pfd, timeout);
9db2e455 MG	453	if (n < 0) {
9db2e455 MG	454	perror("poll");
816f5cd2	455	errno = 0;
9db2e455 MG	456	return -1;
	457	} else if (n == 0) {
	458	usb_event = 1;
1e79d00a	459	timed_out = 1;
9db2e455 MG	460	} else {
	461	for (fd_n = 0; fd_n < dev->n_pfd; fd_n++) {
	462	if (dev->pfd[fd_n].revents) {
	463	if (fd_n < dev->n_usb_pfd) {
	464	usb_event = 1;
	465	break;
	466	} else {
816f5cd2	467	errno = 0;
9db2e455 MG	468	return dev->pfd[fd_n].fd;
	469	}
	470	}
	471	}
	472	}
	473	}
	474
	475	if (usb_event) {
	476	memset(&tv, 0, sizeof(tv));
	477	err = libusb_handle_events_timeout_completed(NULL, &tv, NULL);
	478	if (err < 0) {
27bb301b	479	fprintf(stderr, "libusb_handle_events_timeout_completed: %s\n", usb_strerror(err));
9db2e455 MG	480	errno = EIO;
	481	return -1;
	482	}
	483	}
	484
816f5cd2 MG	485	errno = 0;
	486	if (quit) {
	487	fprintf(stderr, "closing device-connection due to error %d\n", quit);
9db2e455	488	errno = quit;
816f5cd2	489	}
9db2e455	490
1e79d00a MG	491	if (timed_out)
	492	errno = ETIMEDOUT;
	493
9db2e455 MG	494	return -1;
9db2e455 MG	495	}
813afd12	496
62f25bae MG	497	void hmcfgusb_enter_bootloader(struct hmcfgusb_dev *dev)
	498	{
	499	uint8_t out[ASYNC_SIZE];
	500
	501	if (dev->bootloader) {
	502	fprintf(stderr, "request for bootloader mode, but device already in bootloader!\n");
	503	return;
	504	}
	505
	506	memset(out, 0, sizeof(out));
	507	out[0] = 'B';
	508	hmcfgusb_send(dev, out, sizeof(out), 1);
	509
	510	return;
	511	}
	512
0ddb3740 MG	513	void hmcfgusb_leave_bootloader(struct hmcfgusb_dev *dev)
	514	{
	515	uint8_t out[ASYNC_SIZE];
	516
	517	if (!dev->bootloader) {
	518	fprintf(stderr, "request for leaving bootloader mode, but device already in normal mode!\n");
	519	return;
	520	}
	521
	522	memset(out, 0, sizeof(out));
	523	out[0] = 'K';
	524	hmcfgusb_send(dev, out, sizeof(out), 1);
	525
	526	return;
	527	}
	528
813afd12 MG	529	void hmcfgusb_close(struct hmcfgusb_dev *dev)
	530	{
	531	int err;
	532
	533	if (dev->transfer) {
	534	libusb_cancel_transfer(dev->transfer);
	535	}
	536
	537	err = libusb_release_interface(dev->usb_devh, INTERFACE);
	538	if ((err != 0)) {
	539	fprintf(stderr, "Can't release interface: %s\n", usb_strerror(err));
	540	}
	541
	542	libusb_close(dev->usb_devh);
e0a7146e	543	free(dev->pfd);
813afd12 MG	544	free(dev);
	545
	546	libusb_exit(NULL);
	547	}
e75295bb MG	548
	549	void hmcfgusb_set_debug(int d)
	550	{
	551	debug = d;
	552	}