/* MSPDebug - debugging tool for the eZ430 * Copyright (C) 2009-2012 Daniel Beer * * 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; either version 2 of the License, or * (at your option) any later version. * * 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 #include #include #if !defined(__Windows__) || defined(__MINGW32__) #include #else #include #endif #include "rf2500.h" #include "util.h" #include "usbutil.h" #include "output.h" struct rf2500_transport { struct transport base; int int_number; struct usb_dev_handle *handle; uint8_t buf[64]; int len; int offset; }; /********************************************************************* * USB transport * * These functions handle the details of slicing data over USB * transfers. The interface presented is a continuous byte stream with * no slicing codes. * * Writes are unbuffered -- a single write translates to at least * one transfer. */ #define USB_FET_VENDOR 0x0451 #define USB_FET_PRODUCT 0xf432 #define USB_FET_INTERFACE_CLASS 3 #define USB_FET_IN_EP 0x81 #define USB_FET_OUT_EP 0x01 static int open_interface(struct rf2500_transport *tr, struct usb_device *dev, int ino) { printc_dbg("Trying to open interface %d on %s\n", ino, dev->filename); tr->int_number = ino; tr->handle = usb_open(dev); if (!tr->handle) { pr_error("rf2500: can't open device"); return -1; } #if defined(__linux__) if (usb_detach_kernel_driver_np(tr->handle, tr->int_number) < 0) pr_error("rf2500: warning: can't " "detach kernel driver"); #endif #ifdef __Windows__ if (usb_set_configuration(tr->handle, 1) < 0) { pr_error("rf2500: can't set configuration 1"); usb_close(tr->handle); return -1; } #endif if (usb_claim_interface(tr->handle, tr->int_number) < 0) { pr_error("rf2500: can't claim interface"); usb_close(tr->handle); return -1; } return 0; } static int open_device(struct rf2500_transport *tr, struct usb_device *dev) { struct usb_config_descriptor *c = &dev->config[0]; int i; for (i = 0; i < c->bNumInterfaces; i++) { struct usb_interface *intf = &c->interface[i]; struct usb_interface_descriptor *desc = &intf->altsetting[0]; if (desc->bInterfaceClass == USB_FET_INTERFACE_CLASS && !open_interface(tr, dev, desc->bInterfaceNumber)) return 0; } return -1; } static int usbtr_send(transport_t tr_base, const uint8_t *data, int len) { struct rf2500_transport *tr = (struct rf2500_transport *)tr_base; while (len) { uint8_t pbuf[256]; int plen = len > 255 ? 255 : len; int txlen = plen + 1; memcpy(pbuf + 1, data, plen); /* This padding is needed to work around an apparent bug in * the RF2500 FET. Without this, the device hangs. */ if (txlen > 32 && (txlen & 0x3f)) while (txlen < 255 && (txlen & 0x3f)) pbuf[txlen++] = 0xff; else if (txlen > 16 && (txlen & 0xf)) while (txlen < 255 && (txlen & 0xf) != 1) pbuf[txlen++] = 0xff; pbuf[0] = txlen - 1; #ifdef DEBUG_USBTR debug_hexdump("USB transfer out", pbuf, txlen); #endif if (usb_bulk_write(tr->handle, USB_FET_OUT_EP, (char *)pbuf, txlen, 10000) < 0) { pr_error("rf2500: can't send data"); return -1; } data += plen; len -= plen; } return 0; } static int usbtr_recv(transport_t tr_base, uint8_t *databuf, int max_len) { struct rf2500_transport *tr = (struct rf2500_transport *)tr_base; int rlen; if (tr->offset >= tr->len) { if (usb_bulk_read(tr->handle, USB_FET_IN_EP, (char *)tr->buf, sizeof(tr->buf), 10000) < 0) { pr_error("rf2500: can't receive data"); return -1; } #ifdef DEBUG_USBTR debug_hexdump("USB transfer in", tr->buf, 64); #endif tr->len = tr->buf[1] + 2; if (tr->len > sizeof(tr->buf)) tr->len = sizeof(tr->buf); tr->offset = 2; } rlen = tr->len - tr->offset; if (rlen > max_len) rlen = max_len; memcpy(databuf, tr->buf + tr->offset, rlen); tr->offset += rlen; return rlen; } static void usbtr_destroy(transport_t tr_base) { struct rf2500_transport *tr = (struct rf2500_transport *)tr_base; usb_release_interface(tr->handle, tr->int_number); usb_close(tr->handle); free(tr); } static int usbtr_flush(transport_t tr_base) { struct rf2500_transport *tr = (struct rf2500_transport *)tr_base; #if !defined(__APPLE__) && !defined(__sun__) char buf[64]; /* Flush out lingering data. * * The timeout apparently doesn't work on OS/X, and this loop * just hangs once the endpoint buffer empties. */ while (usb_bulk_read(tr->handle, USB_FET_IN_EP, buf, sizeof(buf), 100) > 0); #endif tr->len = 0; tr->offset = 0; return 0; } static int usbtr_set_modem(transport_t tr_base, transport_modem_t state) { printc_err("rf2500: unsupported operation: set_modem\n"); return -1; } static const struct transport_class rf2500_transport = { .destroy = usbtr_destroy, .send = usbtr_send, .recv = usbtr_recv, .flush = usbtr_flush, .set_modem = usbtr_set_modem }; transport_t rf2500_open(const char *devpath, const char *requested_serial) { struct rf2500_transport *tr = malloc(sizeof(*tr)); struct usb_device *dev; if (!tr) { pr_error("rf2500: can't allocate memory"); return NULL; } memset(tr, 0, sizeof(*tr)); tr->base.ops = &rf2500_transport; usb_init(); usb_find_busses(); usb_find_devices(); if (devpath) dev = usbutil_find_by_loc(devpath); else dev = usbutil_find_by_id(USB_FET_VENDOR, USB_FET_PRODUCT, requested_serial); if (!dev) { free(tr); return NULL; } if (open_device(tr, dev) < 0) { printc_err("rf2500: failed to open RF2500 device\n"); free(tr); return NULL; } usbtr_flush(&tr->base); return (transport_t)tr; }