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nyawn |
/* cable_usbblaster.c - Altera USB Blaster driver for the Advanced JTAG Bridge
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Copyright (C) 2008 Nathan Yawn, nathan.yawn@opencores.org
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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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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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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h> // for usleep()
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#include <stdlib.h> // for sleep()
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#include <arpa/inet.h> // for htons()
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#include "usb.h" // libusb header
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#include "cable_common.h"
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#include "errcodes.h"
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#define debug(...) //fprintf(stderr, __VA_ARGS__ )
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// USB constants for the USB Blaster
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// Valid endpoints: 0x81, 0x02, 0x06, 0x88
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#define EP2 0x02
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#define EP1 0x81
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#define ALTERA_VID 0x09FB
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#define ALTERA_PID 0x6001
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//#define USB_TIMEOUT 500
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#define USB_TIMEOUT 10000
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// Bit meanings in the command byte sent to the USB-Blaster
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#define USBBLASTER_CMD_TCK 0x01
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#define USBBLASTER_CMD_TMS 0x02
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#define USBBLASTER_CMD_nCE 0x04 /* should be left low */
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#define USBBLASTER_CMD_nCS 0x08 /* must be set for byte-shift mode reads to work */
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#define USBBLASTER_CMD_TDI 0x10
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#define USBBLASTER_CMD_OE 0x20 /* appears necessary to set it to make everything work */
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#define USBBLASTER_CMD_READ 0x40
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#define USBBLASTER_CMD_BYTESHIFT 0x80
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static struct usb_device *usbblaster_device;
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nyawn |
static char *data_out_scratchpad = NULL;
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4 |
nyawn |
static int data_out_scratchpad_size = 0;
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static char *data_in_scratchpad = NULL;
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static int data_in_scratchpad_size = 0;
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///////////////////////////////////////////////////////////////////////////////
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/*-------------------------------------[ USB Blaster specific functions ]---*/
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/////////////////////////////////////////////////////////////////////////////
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static int usbblaster_start_interface(struct usb_dev_handle *xpcu)
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{
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// Need to send a VENDOR request OUT, request = GET_STATUS
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// Other parameters are ignored
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if(usb_control_msg(xpcu, (USB_ENDPOINT_OUT | USB_TYPE_VENDOR), USB_REQ_GET_STATUS,
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0, 0, NULL, 0, 1000)<0)
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{
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perror("usb_control_msg(start interface)");
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return APP_ERR_USB;
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}
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return APP_ERR_NONE;
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}
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static int usbblaster_read_firmware_version(struct usb_dev_handle *xpcu, uint16_t *buf)
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{
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if(usb_control_msg(xpcu, 0xC0, 0x90, 0, 3, (char*)buf, 2, USB_TIMEOUT)<0)
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{
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perror("usb_control_msg(0x90.0) (read_firmware_version)");
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return APP_ERR_USB;
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}
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// Swap endian
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*buf = htons(*buf);
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//*buf = (*buf << 8) | (*buf >> 8);
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return APP_ERR_NONE;
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}
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static int usbblaster_enumerate_bus(void)
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{
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int flag; // for USB bus scanning stop condition
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struct usb_bus *bus; // pointer on the USB bus
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// board detection
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usb_init();
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usb_find_busses();
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usb_find_devices();
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flag = 0;
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for (bus = usb_get_busses(); bus; bus = bus->next)
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{
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for (usbblaster_device = bus->devices; usbblaster_device; usbblaster_device = usbblaster_device->next)
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{
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if (usbblaster_device->descriptor.idVendor == ALTERA_VID &&
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usbblaster_device->descriptor.idProduct == ALTERA_PID)
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{
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flag = 1;
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fprintf(stderr, "Found Altera USB-Blaster\n");
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return APP_ERR_NONE;
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}
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}
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if (flag)
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break;
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}
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fprintf(stderr, "Failed to find USB-Blaster\n");
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return APP_ERR_CABLENOTFOUND;
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}
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int cable_usbblaster_init(){
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int err = APP_ERR_NONE;
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// Process to reset the usb blaster
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if(err |= usbblaster_enumerate_bus()) {
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return err;
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}
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usb_dev_handle *h_device = usb_open(usbblaster_device);
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if(h_device == NULL)
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{
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fprintf(stderr, "Init failed to open USB device for reset\n");
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return APP_ERR_USB;
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}
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if(usb_reset(h_device) != APP_ERR_NONE)
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fprintf(stderr, "Failed to reset USB Blaster\n");
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usb_close(h_device);
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// Wait for reset!!!
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sleep(1);
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// Do device initialization
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if(err |= usbblaster_enumerate_bus())
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return err;
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h_device = usb_open(usbblaster_device);
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if(h_device == NULL)
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{
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fprintf(stderr, "Init failed to open USB device for initialization\n");
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return APP_ERR_USB;
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}
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// set the configuration
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if (usb_set_configuration(h_device, usbblaster_device->config->bConfigurationValue))
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{
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usb_close(h_device);
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fprintf(stderr, "USB-reset failed to set configuration\n");
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return APP_ERR_NONE;
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}
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while (usb_claim_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber));
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//usb_clear_halt(h_device, EP1);
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//usb_clear_halt(h_device, EP2);
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// IMPORTANT: DO NOT SEND A REQUEST TYPE "CLASS" OR TYPE "RESERVED". This may stall the EP.
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// Some clones need this before they will start processing IN/OUT requests
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if(usbblaster_start_interface(h_device) != APP_ERR_NONE)
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fprintf(stderr, "Failed to start remote interface\n");
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uint16_t buf;
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if(err |= usbblaster_read_firmware_version(h_device, &buf))
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{
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usb_close(h_device);
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fprintf(stderr, "Failed to read firmware version\n");
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return err;
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}
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else
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{
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printf("firmware version = 0x%04X (%u)\n", buf, buf);
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}
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// USB blaster is expecting us to read 2 bytes, which are useless to us...
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char ret[2];
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int rv = usb_bulk_read(h_device, EP1, ret, 2, USB_TIMEOUT);
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if (rv < 0){ // But if we fail, who cares?
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fprintf(stderr, "\nWarning: Failed to read post-init bytes from the EP1 FIFO (%i):\n%s", rv, usb_strerror());
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}
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if (usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber)){
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usb_close(h_device);
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fprintf(stderr, "USB-out failed to release interface\n");
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return APP_ERR_USB;
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}
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usb_close(h_device);
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data_out_scratchpad = (char *) malloc(64);
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data_out_scratchpad_size = 64;
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data_in_scratchpad = (char *) malloc(64);
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data_in_scratchpad_size = 64;
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return APP_ERR_NONE;
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}
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int cable_usbblaster_out(uint8_t value)
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{
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int rv; // to catch return values of functions
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usb_dev_handle *h_device; // handle on the ubs device
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char out;
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int err = APP_ERR_NONE;
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// open the device
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h_device = usb_open(usbblaster_device);
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if (h_device == NULL){
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usb_close(h_device);
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fprintf(stderr, "USB-out failed to open device\n");
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return APP_ERR_USB;
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}
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// set the configuration
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if (usb_set_configuration(h_device, usbblaster_device->config->bConfigurationValue))
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{
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usb_close(h_device);
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fprintf(stderr, "USB-out failed to set configuration\n");
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return APP_ERR_USB;
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}
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// wait until device is ready
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while (usb_claim_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber));
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out = (USBBLASTER_CMD_OE | USBBLASTER_CMD_nCS); // Set output enable (appears necessary) and nCS (necessary for byte-shift reads)
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// Translate to USB blaster protocol
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// USB-Blaster has no TRST pin
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if(value & TCLK_BIT)
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out |= USBBLASTER_CMD_TCK;
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if(value & TDI_BIT)
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out |= USBBLASTER_CMD_TDI;
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if(value & TMS_BIT)
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out |= USBBLASTER_CMD_TMS;
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rv = usb_bulk_write(h_device, EP2, &out, 1, USB_TIMEOUT);
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if (rv != 1){
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fprintf(stderr, "\nFailed to write to the FIFO (rv = %d):\n%s", rv, usb_strerror());
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err |= APP_ERR_USB;
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}
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// release the interface cleanly
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if (usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber)){
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fprintf(stderr, "Warning: failed to release usb interface after write\n");
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err |= APP_ERR_USB;
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}
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// close the device
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usb_close(h_device);
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return err;
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}
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int cable_usbblaster_inout(uint8_t value, uint8_t *in_bit)
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{
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int rv; // to catch return values of functions
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usb_dev_handle *h_device; // handle on the usb device
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char ret[3] = {0,0,0}; // Two useless bytes (0x31,0x60) always precede the useful byte
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nyawn |
char out;
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4 |
nyawn |
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out = (USBBLASTER_CMD_OE | USBBLASTER_CMD_nCS); // Set output enable (?) and nCS (necessary for byte-shift reads)
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out |= USBBLASTER_CMD_READ;
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// Translate to USB blaster protocol
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// USB-Blaster has no TRST pin
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if(value & TCLK_BIT)
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out |= USBBLASTER_CMD_TCK;
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if(value & TDI_BIT)
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out |= USBBLASTER_CMD_TDI;
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if(value & TMS_BIT)
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out |= USBBLASTER_CMD_TMS;
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297 |
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// open the device
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h_device = usb_open(usbblaster_device);
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if (h_device == NULL){
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return APP_ERR_USB;
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}
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302 |
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303 |
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// set the configuration
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if (usb_set_configuration(h_device, usbblaster_device->config->bConfigurationValue)){
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usb_close(h_device);
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return APP_ERR_USB;
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}
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309 |
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// wait until device is ready
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310 |
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while (usb_claim_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber));
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312 |
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// Send a read request
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rv = usb_bulk_write(h_device, EP2, &out, 1, USB_TIMEOUT);
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if (rv != 1){
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fprintf(stderr, "\nFailed to write a read request to the EP2 FIFO:\n%s", usb_strerror());
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316 |
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usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber);
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usb_close(h_device);
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return APP_ERR_USB;
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319 |
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}
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320 |
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321 |
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322 |
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// receive the response
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323 |
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// Sometimes, we do a read but just get the useless 0x31,0x60 chars...
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324 |
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// retry until we get a 3rd byte (with real data), for a reasonable number of retries.
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325 |
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int retries = 0;
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do {
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rv = usb_bulk_read(h_device, EP1, ret, 3, USB_TIMEOUT);
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if (rv < 0){
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fprintf(stderr, "\nFailed to read from the EP1 FIFO (%i):\n%s", rv, usb_strerror());
|
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usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber);
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usb_close(h_device);
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return APP_ERR_USB;
|
333 |
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}
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334 |
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|
335 |
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// fprintf(stderr, "Read %i bytes: 0x%X, 0x%X, 0x%X\n", rv, ret[0], ret[1], ret[2]);
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336 |
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retries++;
|
337 |
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}
|
338 |
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while((rv < 3) && (retries < 20));
|
339 |
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|
340 |
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|
341 |
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// release the interface cleanly
|
342 |
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|
if (usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber)){
|
343 |
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fprintf(stderr, "Warning: failed to release USB interface after read\n");
|
344 |
|
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usb_close(h_device);
|
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return APP_ERR_USB;
|
346 |
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}
|
347 |
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|
348 |
|
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// close the device
|
349 |
|
|
usb_close(h_device);
|
350 |
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|
351 |
|
|
*in_bit = (ret[2] & 0x01); /* TDO is bit 0. USB-Blaster may also set bit 1. */
|
352 |
|
|
return APP_ERR_NONE;
|
353 |
|
|
}
|
354 |
|
|
|
355 |
|
|
|
356 |
|
|
// The usbblaster transfers the bits in the stream in the following order:
|
357 |
|
|
// bit 0 of the first byte received ... bit 7 of the first byte received
|
358 |
|
|
// bit 0 of second byte received ... etc.
|
359 |
|
|
int cable_usbblaster_write_stream(uint32_t *stream, int len_bits, int set_last_bit) {
|
360 |
|
|
int rv; // to catch return values of functions
|
361 |
|
|
usb_dev_handle *h_device; // handle on the ubs device
|
362 |
|
|
unsigned int bytes_to_transfer, leftover_bit_length;
|
363 |
|
|
uint32_t leftover_bits;
|
364 |
|
|
unsigned char i;
|
365 |
|
|
int err = APP_ERR_NONE;
|
366 |
|
|
|
367 |
|
|
//printf("cable_usbblaster_write_stream(0x%X, %d, %i)\n", stream, len, set_last_bit);
|
368 |
|
|
|
369 |
|
|
// This routine must transfer at least 8 bits. Additionally, TMS (the last bit)
|
370 |
|
|
// cannot be set by 'byte shift mode'. So we need at least 8 bits to transfer,
|
371 |
|
|
// plus one bit to send along with TMS.
|
372 |
|
|
bytes_to_transfer = len_bits / 8;
|
373 |
|
|
leftover_bit_length = len_bits - (bytes_to_transfer * 8);
|
374 |
|
|
|
375 |
|
|
if((!leftover_bit_length) && set_last_bit) {
|
376 |
|
|
bytes_to_transfer -= 1;
|
377 |
|
|
leftover_bit_length += 8;
|
378 |
|
|
}
|
379 |
|
|
|
380 |
|
|
//printf("bytes_to_transfer: %d. leftover_bit_length: %d\n", bytes_to_transfer, leftover_bit_length);
|
381 |
|
|
|
382 |
|
|
// Not enough bits for high-speed transfer. bit-bang.
|
383 |
|
|
if(bytes_to_transfer == 0) {
|
384 |
|
|
return cable_common_write_stream(stream, len_bits, set_last_bit);
|
385 |
|
|
}
|
386 |
|
|
|
387 |
|
|
// Bitbang functions leave clock high. USBBlaster assumes clock low at the start of a burst.
|
388 |
|
|
// Lower the clock.
|
389 |
|
|
err |= cable_usbblaster_out(0);
|
390 |
|
|
|
391 |
|
|
// Set leftover bits
|
392 |
|
|
leftover_bits = (stream[bytes_to_transfer>>2] >> ((bytes_to_transfer & 0x3) * 8)) & 0xFF;
|
393 |
|
|
|
394 |
|
|
//printf("leftover_bits: 0x%X, LSB_first_xfer = %d\n", leftover_bits, LSB_first_xfer);
|
395 |
|
|
|
396 |
|
|
// open the device
|
397 |
|
|
h_device = usb_open(usbblaster_device);
|
398 |
|
|
if (h_device == NULL){
|
399 |
|
|
usb_close(h_device);
|
400 |
|
|
fprintf(stderr, "USBBlaster_write_stream failed to open device\n");
|
401 |
|
|
return APP_ERR_USB;
|
402 |
|
|
}
|
403 |
|
|
|
404 |
|
|
// set the configuration
|
405 |
|
|
if (usb_set_configuration(h_device, usbblaster_device->config->bConfigurationValue))
|
406 |
|
|
{
|
407 |
|
|
usb_close(h_device);
|
408 |
|
|
fprintf(stderr, "USBBlaster_write_stream failed to set configuration\n");
|
409 |
|
|
return APP_ERR_USB;
|
410 |
|
|
}
|
411 |
|
|
|
412 |
|
|
// wait until device is ready
|
413 |
|
|
while (usb_claim_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber));
|
414 |
|
|
|
415 |
|
|
|
416 |
|
|
// Copy stream into out. Not pretty, but better than changing the interface to the upper layers;
|
417 |
|
|
// 32 bits are easier to work with than 8 bits in upper layers.
|
418 |
|
|
if(data_out_scratchpad_size < (bytes_to_transfer+1)) {
|
419 |
|
|
free(data_out_scratchpad);
|
420 |
14 |
nyawn |
data_out_scratchpad = (char *) malloc(bytes_to_transfer+1); // free/malloc instead of realloc will save copy time
|
421 |
4 |
nyawn |
if(data_out_scratchpad == NULL) {
|
422 |
|
|
usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber);
|
423 |
|
|
usb_close(h_device);
|
424 |
|
|
return APP_ERR_MALLOC;
|
425 |
|
|
}
|
426 |
|
|
data_out_scratchpad_size = bytes_to_transfer+1;
|
427 |
|
|
}
|
428 |
|
|
|
429 |
|
|
data_out_scratchpad[0] = USBBLASTER_CMD_BYTESHIFT | (bytes_to_transfer & 0x3F);
|
430 |
|
|
for(i = 0; i < bytes_to_transfer; i++) {
|
431 |
|
|
data_out_scratchpad[i+1] = (stream[i>>2] >> (8*(i&0x3))) & 0xFF;
|
432 |
|
|
}
|
433 |
|
|
|
434 |
|
|
|
435 |
|
|
/*
|
436 |
|
|
printf("Data packet: ");
|
437 |
|
|
for(i = 0; i <= bytes_to_transfer; i++)
|
438 |
|
|
printf("0x%X ", out[i]);
|
439 |
|
|
printf("\n");
|
440 |
|
|
*/
|
441 |
|
|
|
442 |
|
|
rv = usb_bulk_write(h_device, EP2, data_out_scratchpad, bytes_to_transfer+1, USB_TIMEOUT);
|
443 |
|
|
if (rv != (bytes_to_transfer+1)){
|
444 |
|
|
fprintf(stderr, "\nFailed to write to the FIFO (rv = %d):\n%s", rv, usb_strerror());
|
445 |
|
|
err |= APP_ERR_USB;
|
446 |
|
|
}
|
447 |
|
|
|
448 |
|
|
// release the interface cleanly
|
449 |
|
|
if (usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber)){
|
450 |
|
|
fprintf(stderr, "Warning: failed to release usb interface after stream write\n");
|
451 |
|
|
}
|
452 |
|
|
|
453 |
|
|
// close the device
|
454 |
|
|
usb_close(h_device);
|
455 |
|
|
|
456 |
|
|
// if we have a number of bits not divisible by 8, or we need to set TMS...
|
457 |
|
|
if(leftover_bit_length != 0) {
|
458 |
|
|
//printf("Doing leftovers: (0x%X, %d, %d)\n", leftover_bits, leftover_bit_length, set_last_bit);
|
459 |
|
|
return cable_common_write_stream(&leftover_bits, leftover_bit_length, set_last_bit);
|
460 |
|
|
}
|
461 |
|
|
|
462 |
|
|
return err;
|
463 |
|
|
}
|
464 |
|
|
|
465 |
|
|
|
466 |
|
|
int cable_usbblaster_read_stream(uint32_t *outstream, uint32_t *instream, int len_bits, int set_last_bit) {
|
467 |
|
|
int rv; // to catch return values of functions
|
468 |
|
|
usb_dev_handle *h_device; // handle on the ubs device
|
469 |
|
|
unsigned int bytes_received = 0;
|
470 |
|
|
unsigned int bytes_to_transfer, leftover_bit_length;
|
471 |
|
|
uint32_t leftover_bits, leftovers_received = 0;
|
472 |
|
|
unsigned char i;
|
473 |
|
|
int retval = APP_ERR_NONE;
|
474 |
|
|
|
475 |
|
|
debug("cable_usbblaster_read_stream(0x%X, %d, %i)\n", outstream[0], len_bits, set_last_bit);
|
476 |
|
|
|
477 |
|
|
// This routine must transfer at least 8 bits. Additionally, TMS (the last bit)
|
478 |
|
|
// cannot be set by 'byte shift mode'. So we need at least 8 bits to transfer,
|
479 |
|
|
// plus one bit to send along with TMS.
|
480 |
|
|
bytes_to_transfer = len_bits / 8;
|
481 |
|
|
leftover_bit_length = len_bits - (bytes_to_transfer * 8);
|
482 |
|
|
|
483 |
|
|
if((!leftover_bit_length) && set_last_bit) {
|
484 |
|
|
bytes_to_transfer -= 1;
|
485 |
|
|
leftover_bit_length += 8;
|
486 |
|
|
}
|
487 |
|
|
|
488 |
|
|
//printf("RD bytes_to_transfer: %d. leftover_bit_length: %d\n", bytes_to_transfer, leftover_bit_length);
|
489 |
|
|
|
490 |
|
|
// Not enough bits for high-speed transfer. bit-bang.
|
491 |
|
|
if(bytes_to_transfer == 0) {
|
492 |
|
|
return cable_common_read_stream(outstream, instream, len_bits, set_last_bit);
|
493 |
|
|
//retval |= cable_common_read_stream(&leftover_bits, &leftovers_received, leftover_bit_length, set_last_bit);
|
494 |
|
|
}
|
495 |
|
|
|
496 |
|
|
// Bitbang functions leave clock high. USBBlaster assumes clock low at the start of a burst.
|
497 |
|
|
// Lower the clock.
|
498 |
|
|
retval |= cable_usbblaster_out(0);
|
499 |
|
|
|
500 |
|
|
// Zero the input, since we add new data by logical-OR
|
501 |
|
|
for(i = 0; i < (len_bits/32); i++)
|
502 |
|
|
instream[i] = 0;
|
503 |
|
|
if(len_bits % 32)
|
504 |
|
|
instream[i] = 0;
|
505 |
|
|
|
506 |
|
|
// Set leftover bits
|
507 |
|
|
leftover_bits = (outstream[bytes_to_transfer>>2] >> ((bytes_to_transfer & 0x3) * 8)) & 0xFF;
|
508 |
|
|
debug("leftover_bits: 0x%X\n", leftover_bits);
|
509 |
|
|
|
510 |
|
|
// open the device
|
511 |
|
|
h_device = usb_open(usbblaster_device);
|
512 |
|
|
if (h_device == NULL){
|
513 |
|
|
usb_close(h_device);
|
514 |
|
|
fprintf(stderr, "USBBlaster_read_stream failed to open device\n");
|
515 |
|
|
return APP_ERR_USB;
|
516 |
|
|
}
|
517 |
|
|
|
518 |
|
|
// set the configuration
|
519 |
|
|
if (usb_set_configuration(h_device, usbblaster_device->config->bConfigurationValue))
|
520 |
|
|
{
|
521 |
|
|
usb_close(h_device);
|
522 |
|
|
fprintf(stderr, "USBBlaster_read_stream failed to set configuration\n");
|
523 |
|
|
return APP_ERR_USB;
|
524 |
|
|
}
|
525 |
|
|
|
526 |
|
|
// wait until device is ready
|
527 |
|
|
while (usb_claim_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber));
|
528 |
|
|
|
529 |
|
|
|
530 |
|
|
|
531 |
|
|
// Copy stream into out. Not pretty, but better than changing the interface to the upper layers;
|
532 |
|
|
// 32 bits are easier to work with than 8 bits in upper layers.
|
533 |
|
|
if(data_out_scratchpad_size < (bytes_to_transfer+1)) {
|
534 |
|
|
free(data_out_scratchpad);
|
535 |
14 |
nyawn |
data_out_scratchpad = (char *) malloc(bytes_to_transfer+1); // free/malloc instead of realloc will save copy time
|
536 |
4 |
nyawn |
if(data_out_scratchpad == NULL) {
|
537 |
|
|
usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber);
|
538 |
|
|
usb_close(h_device);
|
539 |
|
|
return APP_ERR_MALLOC;
|
540 |
|
|
}
|
541 |
|
|
data_out_scratchpad_size = bytes_to_transfer+1;
|
542 |
|
|
}
|
543 |
|
|
|
544 |
|
|
data_out_scratchpad[0] = USBBLASTER_CMD_BYTESHIFT | USBBLASTER_CMD_READ | (bytes_to_transfer & 0x3F); // Set command byte
|
545 |
|
|
for(i = 0; i < bytes_to_transfer; i++) {
|
546 |
|
|
data_out_scratchpad[i+1] = (outstream[i>>2] >> (8*(i&0x3))) & 0xFF;
|
547 |
|
|
}
|
548 |
|
|
|
549 |
|
|
/*
|
550 |
|
|
debug("Data packet: ");
|
551 |
|
|
for(i = 0; i <= bytes_to_transfer; i++)
|
552 |
|
|
debug("0x%X ", data_out_scratchpad[i]);
|
553 |
|
|
debug("\n");
|
554 |
|
|
*/
|
555 |
|
|
|
556 |
|
|
rv = usb_bulk_write(h_device, EP2, data_out_scratchpad, bytes_to_transfer+1, USB_TIMEOUT);
|
557 |
|
|
if (rv != (bytes_to_transfer+1)){
|
558 |
|
|
fprintf(stderr, "\nFailed to write to the EP2 FIFO (rv = %d):\n%s", rv, usb_strerror());
|
559 |
|
|
usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber);
|
560 |
|
|
usb_close(h_device);
|
561 |
|
|
return APP_ERR_USB;
|
562 |
|
|
}
|
563 |
|
|
|
564 |
|
|
|
565 |
|
|
// Make sure we have a big-enough buffer to hold the incoming data
|
566 |
|
|
if(data_in_scratchpad_size < (bytes_to_transfer+2)) {
|
567 |
|
|
free(data_in_scratchpad);
|
568 |
14 |
nyawn |
data_in_scratchpad = (char *) malloc(bytes_to_transfer+2); // free/malloc instead of realloc will save copy time
|
569 |
4 |
nyawn |
if(data_in_scratchpad == NULL) {
|
570 |
|
|
usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber);
|
571 |
|
|
usb_close(h_device);
|
572 |
|
|
return APP_ERR_MALLOC;
|
573 |
|
|
}
|
574 |
|
|
data_in_scratchpad_size = (bytes_to_transfer+2);
|
575 |
|
|
}
|
576 |
|
|
|
577 |
|
|
// receive the response
|
578 |
|
|
// Sometimes, we do a read but just get the useless 0x31,0x60 chars...
|
579 |
|
|
// retry until we get at least 3 bytes (with real data), for a reasonable number of retries.
|
580 |
|
|
int retries = 0;
|
581 |
|
|
bytes_received = 0;
|
582 |
|
|
do {
|
583 |
|
|
rv = usb_bulk_read(h_device, EP1, data_in_scratchpad, (bytes_to_transfer-bytes_received)+2, USB_TIMEOUT);
|
584 |
|
|
if (rv < 0){
|
585 |
|
|
fprintf(stderr, "\nFailed to read stream from the EP1 FIFO (%i):\n%s", rv, usb_strerror());
|
586 |
|
|
usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber);
|
587 |
|
|
usb_close(h_device);
|
588 |
|
|
return APP_ERR_USB;
|
589 |
|
|
}
|
590 |
|
|
|
591 |
14 |
nyawn |
/*
|
592 |
4 |
nyawn |
debug("Read %i bytes: ", rv);
|
593 |
|
|
for(i = 0; i < rv; i++)
|
594 |
|
|
debug("0x%X ", data_in_scratchpad[i]);
|
595 |
|
|
debug("\n");
|
596 |
|
|
*/
|
597 |
|
|
|
598 |
|
|
if(rv > 2) retries = 0;
|
599 |
|
|
else retries++;
|
600 |
|
|
|
601 |
|
|
/* Put the received bytes into the return stream. */
|
602 |
|
|
for(i = 0; i < (rv-2); i++) {
|
603 |
14 |
nyawn |
// Do size/type promotion before shift. Must cast to unsigned, else the value may be
|
604 |
|
|
// sign-extended through the upper 16 bits of the uint32_t.
|
605 |
|
|
uint32_t tmp = (unsigned char) data_in_scratchpad[2+i];
|
606 |
4 |
nyawn |
instream[(bytes_received+i)>>2] |= (tmp << ((i & 0x3)*8));
|
607 |
|
|
}
|
608 |
|
|
|
609 |
|
|
bytes_received += (rv-2);
|
610 |
|
|
}
|
611 |
|
|
while((bytes_received < bytes_to_transfer) && (retries < 15));
|
612 |
|
|
|
613 |
|
|
|
614 |
|
|
// release the interface cleanly
|
615 |
|
|
if (usb_release_interface(h_device, usbblaster_device->config->interface->altsetting->bInterfaceNumber)){
|
616 |
|
|
fprintf(stderr, "Warning: failed to release usb interface after stream read\n");
|
617 |
|
|
}
|
618 |
|
|
|
619 |
|
|
// close the device
|
620 |
|
|
usb_close(h_device);
|
621 |
|
|
|
622 |
|
|
// if we have a number of bits not divisible by 8
|
623 |
|
|
if(leftover_bit_length != 0) {
|
624 |
|
|
debug("Doing leftovers: (0x%X, %d, %d)\n", leftover_bits, leftover_bit_length, set_last_bit);
|
625 |
|
|
retval |= cable_common_read_stream(&leftover_bits, &leftovers_received, leftover_bit_length, set_last_bit);
|
626 |
|
|
instream[bytes_to_transfer>>2] |= (leftovers_received & 0xFF) << (8*(bytes_to_transfer & 0x3));
|
627 |
|
|
}
|
628 |
|
|
|
629 |
|
|
return retval;
|
630 |
|
|
}
|
631 |
|
|
|
632 |
|
|
|
633 |
|
|
int cable_usbblaster_opt(int c, char *str)
|
634 |
|
|
{
|
635 |
|
|
fprintf(stderr, "Unknown parameter '%c'\n", c);
|
636 |
|
|
return APP_ERR_BAD_PARAM;
|
637 |
|
|
}
|
638 |
|
|
|
639 |
|
|
|