mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2024-12-15 04:30:33 +00:00
b849b20a8c
- Added a pre-compiled custom GN3S firmware. - Added a fully-compliant GNU Radio source block for GN3S USB dongle. It can be used also from GNU Radio companion and from Python applications. - Added a new GN3S_Signal_Source block. It is possible to disable the GN3S signal source compilation. See README. git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@217 64b25241-fba3-4117-9849-534c7e92360d
406 lines
8.8 KiB
C
406 lines
8.8 KiB
C
/*
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* Code from: USRP - Universal Software Radio Peripheral (GNU Radio)
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*
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* Initial modifications by:
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*
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* Stephan Esterhuizen, Aerospace Engineering Sciences
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* University of Colorado at Boulder
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* Boulder CO, USA
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*
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* Further modifications for use with the SiGe USB module to accompany
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* the textbook: "A Software-Defined GPS and Galileo Receiver: A
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* Single-Frequency Approach" by Kai Borre, Dennis Akos, et.al. by:
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*
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* Marcus Junered, GNSS Research Group
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* Lulea University of Technology
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* Lulea, Sweden
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*
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* http://ccar.colorado.edu/gnss
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*
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* ---------------------------------------------------------------------
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*
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* GN3S - GNSS IF Streamer for Windows
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* Copyright (C) 2006 Marcus Junered
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "usb_common.h"
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#include "fx2regs.h"
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#include "syncdelay.h"
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#include "fx2utils.h"
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#include "isr.h"
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#include "usb_descriptors.h"
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#include "usb_requests.h"
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#include "gn3s_regs.h"
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extern xdata char str0[];
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extern xdata char str1[];
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extern xdata char str2[];
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extern xdata char str3[];
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extern xdata char str4[];
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extern xdata char str5[];
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#define bRequestType SETUPDAT[0]
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#define bRequest SETUPDAT[1]
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#define wValueL SETUPDAT[2]
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#define wValueH SETUPDAT[3]
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#define wIndexL SETUPDAT[4]
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#define wIndexH SETUPDAT[5]
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#define wLengthL SETUPDAT[6]
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#define wLengthH SETUPDAT[7]
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#define MSB(x) (((unsigned short) x) >> 8)
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#define LSB(x) (((unsigned short) x) & 0xff)
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volatile bit _usb_got_SUDAV;
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volatile bit _usb_rx_overrun;
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unsigned char _usb_config = 0;
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unsigned char _usb_alt_setting = 0; // FIXME really 1/interface
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xdata unsigned char *current_device_descr;
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xdata unsigned char *current_devqual_descr;
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xdata unsigned char *current_config_descr;
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xdata unsigned char *other_config_descr;
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static void
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setup_descriptors (void)
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{
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if (USBCS & bmHSM){ // high speed mode
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current_device_descr = high_speed_device_descr;
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current_devqual_descr = high_speed_devqual_descr;
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current_config_descr = high_speed_config_descr;
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other_config_descr = full_speed_config_descr;
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}
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else {
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current_device_descr = full_speed_device_descr;
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current_devqual_descr = full_speed_devqual_descr;
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current_config_descr = full_speed_config_descr;
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other_config_descr = high_speed_config_descr;
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}
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// whack the type fields
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// FIXME, may not be required.
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// current_config_descr[1] = DT_CONFIG;
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// other_config_descr[1] = DT_OTHER_SPEED;
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}
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static void
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isr_SUDAV (void) interrupt
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{
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clear_usb_irq ();
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_usb_got_SUDAV = 1;
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//usb_handle_setup_packet();
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}
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static void
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isr_USBRESET (void) interrupt
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{
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clear_usb_irq ();
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setup_descriptors ();
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}
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static void
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isr_HIGHSPEED (void) interrupt
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{
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clear_usb_irq ();
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setup_descriptors ();
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}
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void
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usb_install_handlers (void)
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{
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setup_descriptors (); // ensure that they're set before use
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hook_uv (UV_SUDAV, (unsigned short) isr_SUDAV);
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hook_uv (UV_USBRESET, (unsigned short) isr_USBRESET);
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hook_uv (UV_HIGHSPEED, (unsigned short) isr_HIGHSPEED);
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USBIE = bmSUDAV | bmURES | bmHSGRANT;
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}
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// On the FX2 the only plausible endpoints are 0, 1, 2, 4, 6, 8
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// This doesn't check to see that they're enabled
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unsigned char
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plausible_endpoint (unsigned char ep)
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{
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ep &= ~0x80; // ignore direction bit
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if (ep > 8)
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return 0;
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if (ep == 1)
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return 1;
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return (ep & 0x1) == 0; // must be even
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}
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// return pointer to control and status register for endpoint.
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// only called with plausible_endpoints
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xdata volatile unsigned char *
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epcs (unsigned char ep)
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{
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if (ep == 0x01) // ep1 has different in and out CS regs
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return EP1OUTCS;
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if (ep == 0x81)
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return EP1INCS;
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ep &= ~0x80; // ignore direction bit
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if (ep == 0x00) // ep0
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return EP0CS;
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return EP2CS + (ep >> 1); // 2, 4, 6, 8 are consecutive
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}
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void
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usb_handle_setup_packet (void)
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{
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_usb_got_SUDAV = 0;
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// handle the standard requests...
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switch (bRequestType & bmRT_TYPE_MASK){
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case bmRT_TYPE_CLASS:
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case bmRT_TYPE_RESERVED:
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fx2_stall_ep0 (); // we don't handle these. indicate error
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break;
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case bmRT_TYPE_VENDOR:
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// call the application code.
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// If it handles the command it returns non-zero
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if (!app_vendor_cmd ())
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fx2_stall_ep0 ();
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break;
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case bmRT_TYPE_STD:
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// these are the standard requests...
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if ((bRequestType & bmRT_DIR_MASK) == bmRT_DIR_IN){
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////////////////////////////////////
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// handle the IN requests
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////////////////////////////////////
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switch (bRequest){
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case RQ_GET_CONFIG:
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EP0BUF[0] = _usb_config; // FIXME app should handle
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EP0BCH = 0;
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EP0BCL = 1;
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break;
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// --------------------------------
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case RQ_GET_INTERFACE:
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EP0BUF[0] = _usb_alt_setting; // FIXME app should handle
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EP0BCH = 0;
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EP0BCL = 1;
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break;
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// --------------------------------
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case RQ_GET_DESCR:
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switch (wValueH){
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case DT_DEVICE:
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SUDPTRH = MSB (current_device_descr);
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SUDPTRL = LSB (current_device_descr);
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break;
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case DT_DEVQUAL:
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SUDPTRH = MSB (current_devqual_descr);
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SUDPTRL = LSB (current_devqual_descr);
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break;
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case DT_CONFIG:
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if (0 && wValueL != 1) // FIXME only a single configuration
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fx2_stall_ep0 ();
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else {
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SUDPTRH = MSB (current_config_descr);
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SUDPTRL = LSB (current_config_descr);
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}
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break;
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case DT_OTHER_SPEED:
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if (0 && wValueL != 1) // FIXME only a single configuration
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fx2_stall_ep0 ();
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else {
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SUDPTRH = MSB (other_config_descr);
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SUDPTRL = LSB (other_config_descr);
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}
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break;
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case DT_STRING:
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if (wValueL >= nstring_descriptors)
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fx2_stall_ep0 ();
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else {
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xdata char *p = string_descriptors[wValueL];
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SUDPTRH = MSB (p);
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SUDPTRL = LSB (p);
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}
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break;
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default:
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fx2_stall_ep0 (); // invalid request
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break;
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}
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break;
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// --------------------------------
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case RQ_GET_STATUS:
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switch (bRequestType & bmRT_RECIP_MASK){
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case bmRT_RECIP_DEVICE:
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EP0BUF[0] = bmGSDA_SELF_POWERED; // FIXME app should handle
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EP0BUF[1] = 0;
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EP0BCH = 0;
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EP0BCL = 2;
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break;
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case bmRT_RECIP_INTERFACE:
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EP0BUF[0] = 0;
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EP0BUF[1] = 0;
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EP0BCH = 0;
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EP0BCL = 2;
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break;
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case bmRT_RECIP_ENDPOINT:
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if (plausible_endpoint (wIndexL)){
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EP0BUF[0] = *epcs (wIndexL) & bmEPSTALL;
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EP0BUF[1] = 0;
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EP0BCH = 0;
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EP0BCL = 2;
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}
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else
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fx2_stall_ep0 ();
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break;
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default:
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fx2_stall_ep0 ();
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break;
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}
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// --------------------------------
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case RQ_SYNCH_FRAME: // not implemented
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default:
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fx2_stall_ep0 ();
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break;
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}
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}
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else {
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////////////////////////////////////
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// handle the OUT requests
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////////////////////////////////////
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switch (bRequest){
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case RQ_SET_CONFIG:
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_usb_config = wValueL; // FIXME app should handle
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break;
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case RQ_SET_INTERFACE:
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_usb_alt_setting = wValueL; // FIXME app should handle
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break;
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// --------------------------------
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case RQ_CLEAR_FEATURE:
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switch (bRequestType & bmRT_RECIP_MASK){
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case bmRT_RECIP_DEVICE:
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switch (wValueL){
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case FS_DEV_REMOTE_WAKEUP:
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default:
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fx2_stall_ep0 ();
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}
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break;
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case bmRT_RECIP_ENDPOINT:
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if (wValueL == FS_ENDPOINT_HALT && plausible_endpoint (wIndexL)){
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*epcs (wIndexL) &= ~bmEPSTALL;
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fx2_reset_data_toggle (wIndexL);
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}
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else
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fx2_stall_ep0 ();
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break;
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default:
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fx2_stall_ep0 ();
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break;
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}
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break;
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// --------------------------------
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case RQ_SET_FEATURE:
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switch (bRequestType & bmRT_RECIP_MASK){
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case bmRT_RECIP_DEVICE:
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switch (wValueL){
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case FS_TEST_MODE:
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// hardware handles this after we complete SETUP phase handshake
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break;
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case FS_DEV_REMOTE_WAKEUP:
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default:
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fx2_stall_ep0 ();
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break;
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}
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}
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break;
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case bmRT_RECIP_ENDPOINT:
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switch (wValueL){
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case FS_ENDPOINT_HALT:
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if (plausible_endpoint (wIndexL))
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*epcs (wIndexL) |= bmEPSTALL;
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else
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fx2_stall_ep0 ();
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break;
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default:
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fx2_stall_ep0 ();
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break;
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}
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break;
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// --------------------------------
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case RQ_SET_ADDRESS: // handled by fx2 hardware
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case RQ_SET_DESCR: // not implemented
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default:
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fx2_stall_ep0 ();
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}
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}
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break;
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} // bmRT_TYPE_MASK
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// ack handshake phase of device request
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EP0CS |= bmHSNAK;
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}
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