--- /dev/null
+/*
+ * "Copyright (c) 2000-2005 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose, without fee, and without written agreement is
+ * hereby granted, provided that the above copyright notice, the following
+ * two paragraphs and the author appear in all copies of this software.
+ *
+ * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
+ * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
+ * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
+ *
+ * Copyright (c) 2007 Johns Hopkins University.
+ * All rights reserved.
+ *
+ */
+
+/**
+ * @author Jonathan Hui <jwhui@cs.berkeley.edu>
+ * @author Chieh-Jan Mike Liang <cliang4@cs.jhu.edu>
+ * @author Razvan Musaloiu-E. <razvanm@cs.jhu.edu>
+ */
+
+includes crc;
+includes hardware;
+
+module TOSBootM {
+ uses {
+ interface Exec;
+ interface ExtFlash;
+ interface Hardware;
+ interface InternalFlash as IntFlash;
+ interface Leds;
+ interface ProgFlash;
+ interface StdControl as SubControl;
+ interface Init as SubInit;
+ interface Voltage;
+ }
+}
+implementation {
+
+ enum {
+ LEDS_LOWBATT = 1,
+ LEDS_GESTURE = 7,
+ };
+
+ enum {
+ R_SUCCESS,
+ R_INVALID_IMAGE_ERROR,
+ R_PROGRAMMING_ERROR,
+ };
+
+ void startupLeds() {
+
+ uint8_t output = 0x7;
+ uint8_t i;
+
+ for (i = 3; i; i--, output >>= 1 )
+ call Leds.glow(output, output >> 1);
+
+ }
+
+ in_flash_addr_t extFlashReadAddr() {
+ in_flash_addr_t result = 0;
+ uint8_t i;
+ for ( i = 0; i < 4; i++ )
+ result |= ((in_flash_addr_t)call ExtFlash.readByte() & 0xff) << (i*8);
+ return result;
+ }
+
+ bool verifyImage(ex_flash_addr_t startAddr) {
+
+ uint16_t crcTarget = 0, crcTmp = 0;
+ uint16_t addr, len;
+ pgnum_t numPgs;
+ uint8_t i;
+
+ // read size of image
+ call ExtFlash.startRead(startAddr + offsetof(DelugeImgDesc,numPgs));
+ numPgs = call ExtFlash.readByte();
+ call ExtFlash.stopRead();
+
+ if (numPgs == 0 || numPgs == 0xff)
+ return FALSE;
+
+ startAddr += DELUGE_METADATA_SIZE;
+
+ addr = DELUGE_CRC_BLOCK_SIZE;
+ len = DELUGE_BYTES_PER_PAGE-DELUGE_CRC_BLOCK_SIZE;
+
+ for ( i = 0; i < numPgs && crcTarget == crcTmp; i++ ) {
+
+ // read crc
+ call ExtFlash.startRead(startAddr + i*sizeof(uint16_t));
+ crcTarget = (uint16_t)(call ExtFlash.readByte() & 0xff);
+ crcTarget |= (uint16_t)(call ExtFlash.readByte() & 0xff) << 8;
+ call ExtFlash.stopRead();
+
+ // compute crc
+ call ExtFlash.startRead(startAddr + addr);
+ for ( crcTmp = 0; len; len-- )
+ crcTmp = crcByte(crcTmp, call ExtFlash.readByte());
+ call ExtFlash.stopRead();
+
+ addr = (uint16_t)(i+1)*DELUGE_BYTES_PER_PAGE;
+ len = DELUGE_BYTES_PER_PAGE;
+ }
+
+ return (i == numPgs) && (crcTarget == crcTmp);
+ }
+
+ error_t programImage(ex_flash_addr_t startAddr) {
+
+ uint8_t buf[TOSBOOT_INT_PAGE_SIZE];
+ uint16_t pageAddr, newPageAddr;
+ in_flash_addr_t intAddr;
+ in_flash_addr_t secLength;
+ ex_flash_addr_t curAddr;
+
+ if (!verifyImage(startAddr))
+ return R_INVALID_IMAGE_ERROR;
+
+ curAddr = startAddr + DELUGE_METADATA_SIZE + DELUGE_CRC_BLOCK_SIZE + DELUGE_IDENT_SIZE;
+
+ call ExtFlash.startRead(curAddr);
+
+ intAddr = extFlashReadAddr();
+ secLength = extFlashReadAddr();
+ curAddr = curAddr + 8;
+
+ // check that the image starts on the correct boundary
+ if (intAddr != TOSBOOT_END) {
+ call ExtFlash.stopRead();
+ return R_INVALID_IMAGE_ERROR;
+ }
+
+ while ( secLength ) {
+
+ pageAddr = newPageAddr = intAddr / TOSBOOT_INT_PAGE_SIZE;
+
+ call ExtFlash.startRead(curAddr);
+ // fill in ram buffer for internal program flash sector
+ do {
+
+ // check if secLength is all ones
+ if ( secLength == 0xffffffff )
+ return FAIL;
+
+ buf[(uint16_t)intAddr % TOSBOOT_INT_PAGE_SIZE] = call ExtFlash.readByte();
+ intAddr++; curAddr++;
+
+ if ( --secLength == 0 ) {
+ intAddr = extFlashReadAddr();
+ secLength = extFlashReadAddr();
+ curAddr = curAddr + 8;
+ }
+
+ newPageAddr = intAddr / TOSBOOT_INT_PAGE_SIZE;
+
+ } while ( pageAddr == newPageAddr && secLength );
+ call ExtFlash.stopRead();
+
+ call Leds.set(pageAddr);
+
+
+ // write out page
+ if (call ProgFlash.write(pageAddr*TOSBOOT_INT_PAGE_SIZE, buf,
+ TOSBOOT_INT_PAGE_SIZE) == FAIL)
+ return R_PROGRAMMING_ERROR;
+
+ }
+
+ return R_SUCCESS;
+
+ }
+
+ void runApp() {
+ call SubControl.stop();
+ call Exec.exec();
+ }
+
+ void startupSequence() {
+
+ tosboot_args_t args;
+
+ // check voltage and make sure flash can be programmed
+ // if not, just run the app, can't check for gestures
+ // if we can't write to the internal flash anyway
+ if ( !call Voltage.okToProgram() ) {
+ // give user some time and count down LEDs
+ call Leds.flash(LEDS_LOWBATT);
+ startupLeds();
+ runApp();
+ }
+
+ // get current value of counter
+ call IntFlash.read((uint8_t*)TOSBOOT_ARGS_ADDR, &args, sizeof(args));
+
+ // increment gesture counter, see if it exceeds threshold
+ if ( ++args.gestureCount >= TOSBOOT_GESTURE_MAX_COUNT - 1 ) {
+ // gesture has been detected, display receipt of gesture on LEDs
+ call Leds.flash(LEDS_GESTURE);
+
+ // load golden image from flash
+ // if the golden image is invalid, forget about reprogramming
+ // if an error happened during reprogramming, reboot and try again
+ // not much else we can do :-/
+ if (programImage(TOSBOOT_GOLDEN_IMG_ADDR) == R_PROGRAMMING_ERROR)
+ call Hardware.reboot();
+ }
+ else {
+ // update gesture counter
+ call IntFlash.write((uint8_t*)TOSBOOT_ARGS_ADDR, &args, sizeof(args));
+ if ( !args.noReprogram ) {
+ // if an error happened during reprogramming, reboot and try again
+ // after two tries, try programming the golden image
+ if (programImage(args.imageAddr) == R_PROGRAMMING_ERROR) {
+ call Hardware.reboot();
+ }
+ }
+ }
+
+ // give user some time and count down LEDs
+ startupLeds();
+
+ // reset counter and reprogramming flag
+ args.gestureCount = 0xff;
+ args.noReprogram = TRUE;
+ call IntFlash.write((uint8_t*)TOSBOOT_ARGS_ADDR, &args, sizeof(args));
+
+ runApp();
+
+ }
+
+ int main() __attribute__ ((C, spontaneous)) {
+
+ __nesc_disable_interrupt();
+
+ TOSH_SET_PIN_DIRECTIONS();
+ call Hardware.init();
+
+ call SubInit.init();
+ call SubControl.start();
+
+ startupSequence();
+
+ return 0;
+
+ }
+
+}
projects / tinyos-2.x.git / blobdiff