[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);
		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 */
		tv.tv_sec = timeout;
	} else {
		if ((tv.tv_sec == 0) && (tv.tv_usec == 0)) {
			usb_event = 1;
		} else if (tv.tv_sec > timeout) {
			tv.tv_sec = timeout;
			tv.tv_usec = 0;
		}
	}

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

		n = poll(dev->pfd, dev->n_pfd, tv.tv_sec * 1000);
		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);
4cadd56d MG	288	cb_data->dev->transfer = NULL;
4cadd56d MG	289	free(cb_data);
9db2e455 MG	290	}
	291	}
	292
	293	struct hmcfgusb_dev hmcfgusb_init(hmcfgusb_cb_fn cb, void data)
	294	{
	295	libusb_device_handle *devh = NULL;
	296	const struct libusb_pollfd **usb_pfd = NULL;
	297	struct hmcfgusb_dev *dev = NULL;
	298	struct hmcfgusb_cb_data *cb_data = NULL;
62f25bae	299	int bootloader = 0;
9db2e455 MG	300	int err;
	301	int i;
	302
	303	err = libusb_init(NULL);
	304	if (err != 0) {
	305	fprintf(stderr, "Can't initialize libusb: %s\n", usb_strerror(err));
	306	return NULL;
	307	}
	308
62f25bae	309	devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT);
9db2e455	310	if (!devh) {
62f25bae MG	311	devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT_BL);
	312	if (!devh) {
	313	fprintf(stderr, "Can't find/open hmcfgusb!\n");
211fd7e5	314	libusb_exit(NULL);
62f25bae MG	315	return NULL;
	316	}
	317	bootloader = 1;
9db2e455 MG	318	}
	319
	320	dev = malloc(sizeof(struct hmcfgusb_dev));
	321	if (!dev) {
	322	perror("Can't allocate memory for hmcfgusb_dev");
211fd7e5 MG	323	libusb_close(devh);
211fd7e5 MG	324	libusb_exit(NULL);
9db2e455 MG	325	return NULL;
	326	}
	327
	328	memset(dev, 0, sizeof(struct hmcfgusb_dev));
	329	dev->usb_devh = devh;
62f25bae MG	330	dev->bootloader = bootloader;
62f25bae MG	331	dev->opened_at = time(NULL);
9db2e455 MG	332
	333	cb_data = malloc(sizeof(struct hmcfgusb_cb_data));
	334	if (!cb_data) {
	335	perror("Can't allocate memory for hmcfgusb_cb_data");
4cadd56d	336	free(dev);
211fd7e5 MG	337	libusb_close(devh);
211fd7e5 MG	338	libusb_exit(NULL);
9db2e455 MG	339	return NULL;
	340	}
	341
	342	memset(cb_data, 0, sizeof(struct hmcfgusb_cb_data));
	343
813afd12	344	cb_data->dev = dev;
9db2e455 MG	345	cb_data->cb = cb;
	346	cb_data->data = data;
	347
bafd75c9	348	dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data, ASYNC_SIZE);
b5e57d26	349
9db2e455 MG	350	if (!dev->transfer) {
9db2e455 MG	351	fprintf(stderr, "Can't prepare async device io!\n");
4cadd56d MG	352	free(dev);
4cadd56d MG	353	free(cb_data);
211fd7e5 MG	354	libusb_close(devh);
211fd7e5 MG	355	libusb_exit(NULL);
9db2e455 MG	356	return NULL;
	357	}
	358
	359	usb_pfd = libusb_get_pollfds(NULL);
	360	if (!usb_pfd) {
	361	fprintf(stderr, "Can't get FDset from libusb!\n");
	362	free(dev);
4cadd56d	363	free(cb_data);
211fd7e5 MG	364	libusb_close(devh);
211fd7e5 MG	365	libusb_exit(NULL);
9db2e455 MG	366	return NULL;
	367	}
	368
	369	dev->n_usb_pfd = 0;
	370	for(i = 0; usb_pfd[i]; i++)
	371	dev->n_usb_pfd++;
	372
	373	dev->pfd = malloc(dev->n_usb_pfd * sizeof(struct pollfd));
	374	if (!dev->pfd) {
	375	perror("Can't allocate memory for poll-fds");
4cadd56d MG	376	free(dev);
4cadd56d MG	377	free(cb_data);
211fd7e5 MG	378	libusb_close(devh);
211fd7e5 MG	379	libusb_exit(NULL);
9db2e455 MG	380	return NULL;
	381	}
	382
	383	memset(dev->pfd, 0, dev->n_usb_pfd * sizeof(struct pollfd));
	384
	385	for (i = 0; i < dev->n_usb_pfd; i++) {
	386	dev->pfd[i].fd = usb_pfd[i]->fd;
	387	dev->pfd[i].events = usb_pfd[i]->events;
	388	dev->pfd[i].revents = 0;
	389	}
	390
	391	free(usb_pfd);
	392
	393	dev->n_pfd = dev->n_usb_pfd;
	394
f16395da MG	395	quit = 0;
f16395da MG	396
9db2e455 MG	397	return dev;
	398	}
	399
	400	int hmcfgusb_add_pfd(struct hmcfgusb_dev *dev, int fd, short events)
	401	{
	402	dev->n_pfd++;
	403	dev->pfd = realloc(dev->pfd, dev->n_pfd * sizeof(struct pollfd));
	404	if (!dev->pfd) {
	405	perror("Can't realloc poll-fds");
	406	return 0;
	407	}
	408
	409	dev->pfd[dev->n_pfd-1].fd = fd;
	410	dev->pfd[dev->n_pfd-1].events = events;
	411	dev->pfd[dev->n_pfd-1].revents = 0;
	412
	413	return 1;
	414	}
	415
	416	int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
	417	{
	418	struct timeval tv;
	419	int usb_event = 0;
1e79d00a	420	int timed_out = 0;
9db2e455 MG	421	int i;
	422	int n;
	423	int fd_n;
	424	int err;
	425
	426	errno = 0;
	427
	428	memset(&tv, 0, sizeof(tv));
	429	err = libusb_get_next_timeout(NULL, &tv);
	430	if (err < 0) {
	431	fprintf(stderr, "libusb_get_next_timeout: %s\n", usb_strerror(err));
	432	errno = EIO;
	433	return -1;
	434	} else if (err == 0) {
	435	/* No pending timeout or a sane platform */
	436	tv.tv_sec = timeout;
	437	} else {
	438	if ((tv.tv_sec == 0) && (tv.tv_usec == 0)) {
	439	usb_event = 1;
ec30827c MG	440	} else if (tv.tv_sec > timeout) {
	441	tv.tv_sec = timeout;
	442	tv.tv_usec = 0;
9db2e455 MG	443	}
	444	}
	445
	446	if (!usb_event) {
	447	for (i = 0; i < dev->n_pfd; i++) {
	448	dev->pfd[i].revents = 0;
	449	}
	450
	451	n = poll(dev->pfd, dev->n_pfd, tv.tv_sec * 1000);
	452	if (n < 0) {
	453	perror("poll");
816f5cd2	454	errno = 0;
9db2e455 MG	455	return -1;
	456	} else if (n == 0) {
	457	usb_event = 1;
1e79d00a	458	timed_out = 1;
9db2e455 MG	459	} else {
	460	for (fd_n = 0; fd_n < dev->n_pfd; fd_n++) {
	461	if (dev->pfd[fd_n].revents) {
	462	if (fd_n < dev->n_usb_pfd) {
	463	usb_event = 1;
	464	break;
	465	} else {
816f5cd2	466	errno = 0;
9db2e455 MG	467	return dev->pfd[fd_n].fd;
	468	}
	469	}
	470	}
	471	}
	472	}
	473
	474	if (usb_event) {
	475	memset(&tv, 0, sizeof(tv));
	476	err = libusb_handle_events_timeout_completed(NULL, &tv, NULL);
	477	if (err < 0) {
27bb301b	478	fprintf(stderr, "libusb_handle_events_timeout_completed: %s\n", usb_strerror(err));
9db2e455 MG	479	errno = EIO;
	480	return -1;
	481	}
	482	}
	483
816f5cd2 MG	484	errno = 0;
	485	if (quit) {
	486	fprintf(stderr, "closing device-connection due to error %d\n", quit);
9db2e455	487	errno = quit;
816f5cd2	488	}
9db2e455	489
1e79d00a MG	490	if (timed_out)
	491	errno = ETIMEDOUT;
	492
9db2e455 MG	493	return -1;
9db2e455 MG	494	}
813afd12	495
62f25bae MG	496	void hmcfgusb_enter_bootloader(struct hmcfgusb_dev *dev)
	497	{
	498	uint8_t out[ASYNC_SIZE];
	499
	500	if (dev->bootloader) {
	501	fprintf(stderr, "request for bootloader mode, but device already in bootloader!\n");
	502	return;
	503	}
	504
	505	memset(out, 0, sizeof(out));
	506	out[0] = 'B';
	507	hmcfgusb_send(dev, out, sizeof(out), 1);
	508
	509	return;
	510	}
	511
0ddb3740 MG	512	void hmcfgusb_leave_bootloader(struct hmcfgusb_dev *dev)
	513	{
	514	uint8_t out[ASYNC_SIZE];
	515
	516	if (!dev->bootloader) {
	517	fprintf(stderr, "request for leaving bootloader mode, but device already in normal mode!\n");
	518	return;
	519	}
	520
	521	memset(out, 0, sizeof(out));
	522	out[0] = 'K';
	523	hmcfgusb_send(dev, out, sizeof(out), 1);
	524
	525	return;
	526	}
	527
813afd12 MG	528	void hmcfgusb_close(struct hmcfgusb_dev *dev)
	529	{
	530	int err;
	531
	532	if (dev->transfer) {
	533	libusb_cancel_transfer(dev->transfer);
	534	}
	535
	536	err = libusb_release_interface(dev->usb_devh, INTERFACE);
	537	if ((err != 0)) {
	538	fprintf(stderr, "Can't release interface: %s\n", usb_strerror(err));
	539	}
	540
	541	libusb_close(dev->usb_devh);
e0a7146e	542	free(dev->pfd);
813afd12 MG	543	free(dev);
	544
	545	libusb_exit(NULL);
	546	}
e75295bb MG	547
	548	void hmcfgusb_set_debug(int d)
	549	{
	550	debug = d;
	551	}