/* usb.c * * Copyright (C) 2001-2004 Mariusz Woloszyn * Copyright (C) 2003-2016 Marcus Meissner * Copyright (C) 2003-2017 Marcus Meissner * Copyright (C) 2006-2007 Linus Walleij * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301 USA */ #define _DEFAULT_SOURCE #include #include "ptp.h" #include "ptp-private.h" #include "ptp-bugs.h" #include #include #include #include #include #include #include #ifdef ENABLE_NLS # include # undef _ # define _(String) dgettext (PACKAGE, String) # ifdef gettext_noop # define N_(String) gettext_noop (String) # else # define N_(String) (String) # endif #else # define textdomain(String) (String) # define gettext(String) (String) # define dgettext(Domain,Message) (Message) # define dcgettext(Domain,Message,Type) (Message) # define bindtextdomain(Domain,Directory) (Domain) # define _(String) (String) # define N_(String) (String) #endif #define CONTEXT_BLOCK_SIZE 200000 #define PTP_CNT_INIT(cnt) {memset(&cnt,0,sizeof(cnt));} /* PTP2_FAST_TIMEOUT: how long (in milliseconds) we should wait for * an URB to come back on an interrupt endpoint */ /* 100 is not enough for various cameras types. 150 seems to work better */ #define PTP2_FAST_TIMEOUT 150 /* Pack / unpack functions */ #include "ptp-pack.c" /* send / receive functions */ uint16_t ptp_usb_sendreq (PTPParams* params, PTPContainer* req, int dataphase) { int res, towrite, do_retry = TRUE; PTPUSBBulkContainer usbreq; Camera *camera = ((PTPData *)params->data)->camera; switch (req->Nparam) { default: case 0: GP_LOG_D ("Sending PTP_OC 0x%0x (%s) request...", req->Code, ptp_get_opcode_name(params, req->Code)); break; case 1: GP_LOG_D ("Sending PTP_OC 0x%0x (%s) (0x%x) request...", req->Code, ptp_get_opcode_name(params, req->Code), req->Param1); break; case 2: GP_LOG_D ("Sending PTP_OC 0x%0x (%s) (0x%x,0x%x) request...", req->Code, ptp_get_opcode_name(params, req->Code), req->Param1, req->Param2); break; case 3: GP_LOG_D ("Sending PTP_OC 0x%0x (%s) (0x%x,0x%x,0x%x) request...", req->Code, ptp_get_opcode_name(params, req->Code), req->Param1, req->Param2, req->Param3); break; } /* build appropriate USB container */ usbreq.length=htod32(PTP_USB_BULK_REQ_LEN- (sizeof(uint32_t)*(5-req->Nparam))); usbreq.type=htod16(PTP_USB_CONTAINER_COMMAND); usbreq.code=htod16(req->Code); usbreq.trans_id=htod32(req->Transaction_ID); usbreq.payload.params.param1=htod32(req->Param1); usbreq.payload.params.param2=htod32(req->Param2); usbreq.payload.params.param3=htod32(req->Param3); usbreq.payload.params.param4=htod32(req->Param4); usbreq.payload.params.param5=htod32(req->Param5); /* send it to responder */ towrite = PTP_USB_BULK_REQ_LEN-(sizeof(uint32_t)*(5-req->Nparam)); retry: res = gp_port_write (camera->port, (char*)&usbreq, towrite); if (res != towrite) { if (res < 0) { GP_LOG_E ("PTP_OC 0x%04x sending req failed: %s (%d)", req->Code, gp_port_result_as_string(res), res); if (res == GP_ERROR_IO_WRITE && do_retry) { GP_LOG_D ("Clearing halt on OUT EP and retrying once."); gp_port_usb_clear_halt (camera->port, GP_PORT_USB_ENDPOINT_OUT); do_retry = FALSE; goto retry; } } else GP_LOG_E ("PTP_OC 0x%04x sending req failed: wrote only %d of %d bytes", req->Code, res, towrite); return translate_gp_result_to_ptp(res); } return PTP_RC_OK; } uint16_t ptp_usb_senddata (PTPParams* params, PTPContainer* ptp, uint64_t size, PTPDataHandler *handler ) { uint16_t ret = PTP_RC_OK; int res, wlen, datawlen; PTPUSBBulkContainer usbdata; unsigned long bytes_left_to_transfer, written; Camera *camera = ((PTPData *)params->data)->camera; unsigned char *bytes; int progressid = 0; int usecontext = (size > CONTEXT_BLOCK_SIZE); GPContext *context = ((PTPData *)params->data)->context; GP_LOG_D ("Sending PTP_OC 0x%0x (%s) data...", ptp->Code, ptp_get_opcode_name(params, ptp->Code)); /* build appropriate USB container */ usbdata.length = htod32(PTP_USB_BULK_HDR_LEN+size); usbdata.type = htod16(PTP_USB_CONTAINER_DATA); usbdata.code = htod16(ptp->Code); usbdata.trans_id= htod32(ptp->Transaction_ID); if (params->split_header_data) { datawlen = 0; wlen = PTP_USB_BULK_HDR_LEN; } else { unsigned long gotlen; /* For all camera devices. */ datawlen = (sizegetfunc(params, handler->priv, datawlen, usbdata.payload.data, &gotlen); if (ret != PTP_RC_OK) return ret; if (gotlen != datawlen) return PTP_RC_GeneralError; } res = gp_port_write (camera->port, (char*)&usbdata, wlen); if (res != wlen) { if (res < 0) GP_LOG_E ("PTP_OC 0x%04x sending data failed: %s (%d)", ptp->Code, gp_port_result_as_string(res), res); else GP_LOG_E ("PTP_OC 0x%04x sending data failed: wrote only %d of %d bytes", ptp->Code, res, wlen); return translate_gp_result_to_ptp(res); } if (size <= datawlen) { /* nothing more to do */ written = wlen; goto finalize; } if (usecontext) progressid = gp_context_progress_start (context, (size/CONTEXT_BLOCK_SIZE), _("Uploading...")); bytes = malloc (4096); if (!bytes) return PTP_RC_GeneralError; /* if everything OK send the rest */ bytes_left_to_transfer = size-datawlen; ret = PTP_RC_OK; written = 0; while(bytes_left_to_transfer > 0) { unsigned long readlen, toread, oldwritten = written; toread = 4096; if (toread > bytes_left_to_transfer) toread = bytes_left_to_transfer; ret = handler->getfunc (params, handler->priv, toread, bytes, &readlen); if (ret != PTP_RC_OK) break; res = gp_port_write (camera->port, (char*)bytes, readlen); if (res < 0) { ret = translate_gp_result_to_ptp(res); break; } bytes_left_to_transfer -= res; written += res; if (usecontext && (oldwritten/CONTEXT_BLOCK_SIZE < written/CONTEXT_BLOCK_SIZE)) gp_context_progress_update (context, progressid, written/CONTEXT_BLOCK_SIZE); #if 0 /* Does not work this way... Hmm. */ if (gp_context_cancel(context) == GP_CONTEXT_FEEDBACK_CANCEL) { ret = ptp_usb_control_cancel_request (params,ptp->Transaction_ID); if (ret == PTP_RC_OK) ret = PTP_ERROR_CANCEL; break; } #endif } if (usecontext) gp_context_progress_stop (context, progressid); free (bytes); finalize: if ((ret == PTP_RC_OK) && ((written % params->maxpacketsize) == 0)) gp_port_write (camera->port, "x", 0); if ((ret!=PTP_RC_OK) && (ret!=PTP_ERROR_CANCEL)) ret = PTP_ERROR_IO; return ret; } static uint16_t ptp_usb_getpacket(PTPParams *params, PTPUSBBulkContainer *packet, uint32_t maxsize, uint32_t *rlen) { int tries = 0, result; Camera *camera = ((PTPData *)params->data)->camera; /* read the header and potentially the first data */ if (params->response_packet_size > 0) { GP_LOG_D ("Returning previously buffered response packet."); /* If there is a buffered packet, just use it. */ if (params->response_packet_size > maxsize) params->response_packet_size = maxsize; memcpy(packet, params->response_packet, params->response_packet_size); *rlen = params->response_packet_size; free(params->response_packet); params->response_packet = NULL; params->response_packet_size = 0; /* Here this signifies a "virtual read" */ return PTP_RC_OK; } retry: /* A packet should come in a single read always. */ result = gp_port_read (camera->port, (char*)packet, maxsize); /* This might be a left over zero-write of the device at the end of the previous transmission */ if (result == 0) result = gp_port_read (camera->port, (char*)packet, maxsize); if (result > 0) { *rlen = result; return PTP_RC_OK; } if (result == GP_ERROR_IO_READ) { GP_LOG_D ("Clearing halt on IN EP and retrying once."); gp_port_usb_clear_halt (camera->port, GP_PORT_USB_ENDPOINT_IN); /* retrying only makes sense if we did not read anything yet */ if (tries++ < 1) goto retry; } return translate_gp_result_to_ptp(result); } #define READLEN 512*1024 /* read blob size, mostly to avoid reading all of it at once. */ uint16_t ptp_usb_getdata (PTPParams* params, PTPContainer* ptp, PTPDataHandler *handler) { uint16_t ret; PTPUSBBulkContainer usbdata; unsigned char *data = NULL; uint32_t bytes_to_read, bytes_read; Camera *camera = ((PTPData *)params->data)->camera; int report_progress, progress_id = 0, do_retry = TRUE, res = GP_OK; GPContext *context = ((PTPData *)params->data)->context; GP_LOG_D ("Reading PTP_OC 0x%0x (%s) data...", ptp->Code, ptp_get_opcode_name(params, ptp->Code)); PTP_CNT_INIT(usbdata); ret = ptp_usb_getpacket (params, &usbdata, sizeof(usbdata), &bytes_read); if (ret != PTP_RC_OK) goto exit; if (bytes_read < PTP_USB_BULK_HDR_LEN) { GP_LOG_E ("Read short bulk packet in data phase %d vs %d vs min len %d", bytes_read, dtoh32(usbdata.length), (uint32_t)PTP_USB_BULK_HDR_LEN); ret = PTP_ERROR_IO; goto exit; } if (dtoh16(usbdata.type) != PTP_USB_CONTAINER_DATA) { /* We might have got a response instead. On error for instance. */ if (dtoh16(usbdata.type) == PTP_USB_CONTAINER_RESPONSE) { /* responses are short and we should have it as-is right now */ if (bytes_read != dtoh32(usbdata.length)) { GP_LOG_E ("Read broken ptp response in data phase, read %d vs %d", bytes_read, dtoh32(usbdata.length)); ret = PTP_ERROR_IO; goto exit; } if (dtoh32(usbdata.length) > sizeof(usbdata)) { GP_LOG_E ("Read too large ptp response in data phase, packet %d bytes large", dtoh32(usbdata.length)); ret = PTP_ERROR_IO; goto exit; } /* FIXME: maximum size of response packet perhaps ? */ params->response_packet = malloc(dtoh32(usbdata.length)); if (!params->response_packet) return PTP_RC_GeneralError; memcpy(params->response_packet, (uint8_t *) &usbdata, dtoh32(usbdata.length)); params->response_packet_size = dtoh32(usbdata.length); ret = PTP_RC_OK; } else { ret = PTP_ERROR_DATA_EXPECTED; } goto exit; } if (dtoh16(usbdata.code)!=ptp->Code) { /* A creative Zen device breaks down here, by leaving out * Code and Transaction ID */ if (MTP_ZEN_BROKEN_HEADER(params)) { GP_LOG_D ("Read broken PTP header (Code is %04x vs %04x), compensating.", dtoh16(usbdata.code), ptp->Code); usbdata.code = dtoh16(ptp->Code); usbdata.trans_id = htod32(ptp->Transaction_ID); } else { GP_LOG_E ("Read broken PTP header (Code is %04x vs %04x).", dtoh16(usbdata.code), ptp->Code ); ret = PTP_ERROR_IO; /* if this is a valid packet that came late, drain it to allow reestablishing */ if (bytes_read >= dtoh32(usbdata.length)) goto exit; bytes_to_read = dtoh32(usbdata.length) - bytes_read; bytes_read -= PTP_USB_BULK_HDR_LEN; data = malloc(READLEN); if (!data) goto exit; while (bytes_to_read > 0) { unsigned long chunk_to_read = bytes_to_read; /* if in read-until-short-packet mode, read one packet at a time */ /* else read in large blobs */ /* else read all but the last short packet depending on EP packetsize. */ if (chunk_to_read > READLEN) chunk_to_read = READLEN; else if (chunk_to_read > params->maxpacketsize) chunk_to_read = chunk_to_read - (chunk_to_read % params->maxpacketsize); res = gp_port_read (camera->port, (char*)data, chunk_to_read); if (res == GP_ERROR_IO_READ) break; if (res <= 0) break; bytes_to_read -= res; bytes_read += res; } free (data); data = NULL; goto exit; } } if (bytes_read > dtoh32(usbdata.length)) { /* * Buffer the surplus response packet if it is >= * PTP_USB_BULK_HDR_LEN * (i.e. it is probably an entire package) * else discard it as erroneous surplus data. * This will even work if more than 2 packets appear * in the same transaction, they will just be handled * iteratively. * * Marcus observed stray bytes on iRiver devices; * these are still discarded. */ uint32_t surplen = bytes_read - dtoh32(usbdata.length); if (surplen >= PTP_USB_BULK_HDR_LEN) { params->response_packet = malloc(surplen); if (!params->response_packet) return PTP_RC_GeneralError; memcpy(params->response_packet, (uint8_t *) &usbdata + dtoh32(usbdata.length), surplen); params->response_packet_size = surplen; } else { GP_LOG_D ("Read %ld bytes too much, expect problems!", (long)(bytes_read - dtoh32(usbdata.length))); } bytes_read = dtoh32(usbdata.length); } /* For most PTP devices rlen is 512 == sizeof(usbdata) * here. For MTP devices splitting header and data it might * be PTP_USB_BULK_HDR_LEN (12). */ /* autodetect split header/data MTP devices */ if (dtoh32(usbdata.length) > PTP_USB_BULK_HDR_LEN && (bytes_read==PTP_USB_BULK_HDR_LEN)) params->split_header_data = 1; /* Copy the payload bytes we already read (with the first usb packet) */ ret = handler->putfunc (params, handler->priv, bytes_read - PTP_USB_BULK_HDR_LEN, usbdata.payload.data); if (ret != PTP_RC_OK) goto exit; /* Check if we are done already... */ if (bytes_read >= dtoh32(usbdata.length)) goto exit; /* If not read the rest of it. */ /* Make bytes_to_read contain the number of remaining payload-bytes to read. */ bytes_to_read = dtoh32(usbdata.length) - bytes_read; /* Make bytes_read contain the number of payload-bytes already read. */ bytes_read -= PTP_USB_BULK_HDR_LEN; data = malloc(READLEN); if (!data) return PTP_RC_GeneralError; report_progress = (bytes_to_read > 2*CONTEXT_BLOCK_SIZE) && (dtoh32(usbdata.length) != 0xffffffffU); /* On partial reads, do not report progress, this might lead to flickering progress bars. * FIXME: would be better to pass in a flag */ if ( (ptp->Code == PTP_OC_GetPartialObject) || ( (params->deviceinfo.VendorExtensionID == PTP_VENDOR_CANON) && ( (ptp->Code == PTP_OC_CANON_EOS_GetPartialObject) || (ptp->Code == PTP_OC_CANON_EOS_GetPartialObject64) || (ptp->Code == PTP_OC_CANON_EOS_GetPartialObjectEx) || (ptp->Code == PTP_OC_CANON_EOS_GetPartialObjectEX64) ) ) || (ptp->Code == PTP_OC_ANDROID_GetPartialObject64) ) report_progress = 0; if (report_progress) progress_id = gp_context_progress_start (context, (bytes_to_read/CONTEXT_BLOCK_SIZE), _("Downloading...")); while (bytes_to_read > 0) { unsigned long chunk_to_read = bytes_to_read; /* if in read-until-short-packet mode, read one packet at a time */ /* else read in large blobs */ /* else read all but the last short packet depending on EP packetsize. */ if (dtoh32(usbdata.length) == 0xffffffffU) chunk_to_read = PTP_USB_BULK_HS_MAX_PACKET_LEN_READ; else if (chunk_to_read > READLEN) chunk_to_read = READLEN; else if (chunk_to_read > params->maxpacketsize) chunk_to_read = chunk_to_read - (chunk_to_read % params->maxpacketsize); res = gp_port_read (camera->port, (char*)data, chunk_to_read); if (res == GP_ERROR_IO_READ && do_retry) { GP_LOG_D ("Clearing halt on IN EP and retrying once."); gp_port_usb_clear_halt (camera->port, GP_PORT_USB_ENDPOINT_IN); /* retrying only once and only if we did not read anything yet */ do_retry = FALSE; continue; } else if (res <= 0) { ret = translate_gp_result_to_ptp(res); break; } else do_retry = FALSE; /* once we have succesfully read any data, don't try again */ ret = handler->putfunc (params, handler->priv, res, data); if (ret != PTP_RC_OK) break; if (dtoh32(usbdata.length) == 0xffffffffU) { /* once we have read a short packet, we are done. */ if (res < PTP_USB_BULK_HS_MAX_PACKET_LEN_READ) bytes_to_read = 0; } else bytes_to_read -= res; bytes_read += res; if (report_progress && ((bytes_read-res)/CONTEXT_BLOCK_SIZE < bytes_read/CONTEXT_BLOCK_SIZE)) gp_context_progress_update (context, progress_id, bytes_read/CONTEXT_BLOCK_SIZE); /* Only cancel transfers larger than 1MB. as * canceling did not work on eos_get_viewfinder of 200kb */ if ((bytes_read > 1024*1024) && gp_context_cancel(context) == GP_CONTEXT_FEEDBACK_CANCEL) { ret = PTP_ERROR_CANCEL; break; } } if (report_progress) gp_context_progress_stop (context, progress_id); exit: free (data); if ((ret!=PTP_RC_OK) && (ret!=PTP_ERROR_CANCEL)) { GP_LOG_E ("PTP_OC 0x%04x receiving data failed: %s (0x%04x)", ptp->Code, ptp_strerror(ret, params->deviceinfo.VendorExtensionID), ret); return PTP_ERROR_IO; } return ret; } uint16_t ptp_usb_getresp (PTPParams* params, PTPContainer* resp) { uint16_t ret; uint32_t rlen; PTPUSBBulkContainer usbresp; /*GPContext *context = ((PTPData *)params->data)->context;*/ GP_LOG_D ("Reading PTP_OC 0x%0x (%s) response...", resp->Code, ptp_get_opcode_name(params, resp->Code)); PTP_CNT_INIT(usbresp); /* read response, it should never be longer than sizeof(usbresp) */ ret = ptp_usb_getpacket(params, &usbresp, sizeof(usbresp), &rlen); if (ret!=PTP_RC_OK) { ret = PTP_ERROR_IO; } else if (rlen < 12) { ret = PTP_ERROR_IO; } else if (rlen != dtoh32(usbresp.length)) { ret = PTP_ERROR_IO; } else if (dtoh16(usbresp.type)!=PTP_USB_CONTAINER_RESPONSE) { ret = PTP_ERROR_RESP_EXPECTED; } else if (dtoh16(usbresp.code)!=resp->Code) { ret = dtoh16(usbresp.code); } if (ret!=PTP_RC_OK) { GP_LOG_E ("PTP_OC 0x%04x receiving resp failed: %s (0x%04x)", resp->Code, ptp_strerror(ret, params->deviceinfo.VendorExtensionID), ret); return ret; } /* build an appropriate PTPContainer */ resp->Code=dtoh16(usbresp.code); resp->SessionID=params->session_id; resp->Transaction_ID=dtoh32(usbresp.trans_id); if (resp->Transaction_ID != params->transaction_id - 1) { if (MTP_ZEN_BROKEN_HEADER(params)) { GP_LOG_D ("Read broken PTP header (transid is %08x vs %08x), compensating.", resp->Transaction_ID, params->transaction_id - 1 ); resp->Transaction_ID=params->transaction_id-1; } /* else will be handled by ptp.c as error. */ } resp->Nparam=(rlen-12)/4; resp->Param1=dtoh32(usbresp.payload.params.param1); resp->Param2=dtoh32(usbresp.payload.params.param2); resp->Param3=dtoh32(usbresp.payload.params.param3); resp->Param4=dtoh32(usbresp.payload.params.param4); resp->Param5=dtoh32(usbresp.payload.params.param5); return ret; } /* Event handling functions */ /* PTP Events wait for or check mode */ #define PTP_EVENT_CHECK 0x0000 /* waits for */ #define PTP_EVENT_CHECK_FAST 0x0001 /* checks */ #define PTP_EVENT_CHECK_QUEUE 0x0002 /* just looks in the queue */ static inline uint16_t ptp_usb_event (PTPParams* params, PTPContainer* event, int wait) { int result, timeout, fasttimeout; unsigned long rlen; PTPUSBEventContainer usbevent; Camera *camera = ((PTPData *)params->data)->camera; if (params->deviceinfo.VendorExtensionID == PTP_VENDOR_CANON) fasttimeout = PTP2_FAST_TIMEOUT*2; else fasttimeout = PTP2_FAST_TIMEOUT; PTP_CNT_INIT(usbevent); if (event==NULL) return PTP_ERROR_BADPARAM; switch(wait) { case PTP_EVENT_CHECK: result = gp_port_check_int (camera->port, (char*)&usbevent, sizeof(usbevent)); if (result <= 0) result = gp_port_check_int (camera->port, (char*)&usbevent, sizeof(usbevent)); break; case PTP_EVENT_CHECK_FAST: gp_port_get_timeout (camera->port, &timeout); gp_port_set_timeout (camera->port, fasttimeout); result = gp_port_check_int (camera->port, (char*)&usbevent, sizeof(usbevent)); if (result <= 0) result = gp_port_check_int (camera->port, (char*)&usbevent, sizeof(usbevent)); gp_port_set_timeout (camera->port, timeout); break; case PTP_EVENT_CHECK_QUEUE: gp_port_get_timeout (camera->port, &timeout); gp_port_set_timeout (camera->port, 0); /* indicates no waiting at all */ result = gp_port_check_int (camera->port, (char*)&usbevent, sizeof(usbevent)); gp_port_set_timeout (camera->port, timeout); break; default: return PTP_ERROR_BADPARAM; } if (result < 0) { if ((result != GP_ERROR_TIMEOUT) || (wait != PTP_EVENT_CHECK_FAST)) GP_LOG_E ("Reading PTP event failed: %s (%d)", gp_port_result_as_string(result), result); return translate_gp_result_to_ptp(result); } if (result == 0) { GP_LOG_E ("Reading PTP event failed: a 0 read occurred, assuming timeout."); return PTP_ERROR_TIMEOUT; } rlen = result; if (rlen < 8) { GP_LOG_E ("Reading PTP event failed: only %ld bytes read", rlen); return PTP_ERROR_IO; } /* Only do the additional reads for "events". Canon IXUS 2 likes to * send unrelated data. */ if ( (dtoh16(usbevent.type) == PTP_USB_CONTAINER_EVENT) && (dtoh32(usbevent.length) > rlen) ) { GP_LOG_D ("Canon incremental read (done: %ld, todo: %d)", rlen, dtoh32(usbevent.length)); gp_port_get_timeout (camera->port, &timeout); gp_port_set_timeout (camera->port, PTP2_FAST_TIMEOUT); while (dtoh32(usbevent.length) > rlen) { result = gp_port_check_int (camera->port, ((char*)&usbevent)+rlen, sizeof(usbevent)-rlen); if (result <= 0) break; rlen += result; } gp_port_set_timeout (camera->port, timeout); } /* if we read anything over interrupt endpoint it must be an event */ /* build an appropriate PTPContainer */ event->Nparam = (rlen-12)/4; event->Code = dtoh16(usbevent.code); event->SessionID=params->session_id; event->Transaction_ID=dtoh32(usbevent.trans_id); event->Param1 = dtoh32(usbevent.param1); event->Param2 = dtoh32(usbevent.param2); event->Param3 = dtoh32(usbevent.param3); return PTP_RC_OK; } uint16_t ptp_usb_event_check_queue (PTPParams* params, PTPContainer* event) { return ptp_usb_event (params, event, PTP_EVENT_CHECK_QUEUE); } uint16_t ptp_usb_event_check (PTPParams* params, PTPContainer* event) { return ptp_usb_event (params, event, PTP_EVENT_CHECK_FAST); } uint16_t ptp_usb_event_wait (PTPParams* params, PTPContainer* event) { return ptp_usb_event (params, event, PTP_EVENT_CHECK); } uint16_t ptp_usb_control_get_extended_event_data (PTPParams *params, char *buffer, int *size) { Camera *camera = ((PTPData *)params->data)->camera; int ret; GP_LOG_D ("Getting extended event data."); ret = gp_port_usb_msg_class_read (camera->port, 0x65, 0x0000, 0x0000, buffer, *size); if (ret < GP_OK) return PTP_ERROR_IO; *size = ret; return PTP_RC_OK; } uint16_t ptp_usb_control_device_reset_request (PTPParams *params) { Camera *camera = ((PTPData *)params->data)->camera; int ret; GP_LOG_D ("Sending usb device reset request."); ret = gp_port_usb_msg_class_write (camera->port, 0x66, 0x0000, 0x0000, NULL, 0); if (ret < GP_OK) return PTP_ERROR_IO; return PTP_RC_OK; } uint16_t ptp_usb_control_get_device_status (PTPParams *params, char *buffer, int *size) { Camera *camera = ((PTPData *)params->data)->camera; int ret; ret = gp_port_usb_msg_class_read (camera->port, 0x67, 0x0000, 0x0000, buffer, *size); if (ret < GP_OK) return PTP_ERROR_IO; *size = ret; return PTP_RC_OK; } uint16_t ptp_usb_control_cancel_request (PTPParams *params, uint32_t transactionid) { Camera *camera = ((PTPData *)params->data)->camera; int ret; unsigned char buffer[6]; htod16a(&buffer[0],PTP_EC_CancelTransaction); htod32a(&buffer[2],transactionid); ret = gp_port_usb_msg_class_write (camera->port, 0x64, 0x0000, 0x0000, (char*)buffer, sizeof (buffer)); if (ret < GP_OK) return PTP_ERROR_IO; return PTP_RC_OK; }