+//-----------------------------------------------------------------------------
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Main code for the bootloader
+//-----------------------------------------------------------------------------
+
#include <proxmark3.h>
+#include "usb_cdc.h"
+#include "cmd.h"
+
+void DbpString(char *str) {
+ byte_t len = 0;
+ while (str[len] != 0x00)
+ ++len;
+
+ cmd_send(CMD_DEBUG_PRINT_STRING,len,0,0,(byte_t*)str,len);
+}
struct common_area common_area __attribute__((section(".commonarea")));
unsigned int start_addr, end_addr, bootrom_unlocked;
(1<<AT91C_ID_PWMC) |
(1<<AT91C_ID_UDP);
- // worst case scenario, with 16Mhz xtal startup delay is 14.5ms
- // with a slow clock running at it worst case (max) frequency of 42khz
- // max startup delay = (14.5ms*42k)/8 = 76 = 0x4C round up to 0x50
+ // worst case scenario, with MAINCK = 16Mhz xtal, startup delay is 1.4ms
+ // if SLCK slow clock runs at its worst case (max) frequency of 42khz
+ // max startup delay = (1.4ms*42k)/8 = 7.356 so round up to 8
// enable main oscillator and set startup delay
AT91C_BASE_PMC->PMC_MOR =
- PMC_MAIN_OSC_ENABLE |
- PMC_MAIN_OSC_STARTUP_DELAY(0x50);
+ AT91C_CKGR_MOSCEN |
+ PMC_MAIN_OSC_STARTUP_DELAY(8);
// wait for main oscillator to stabilize
- while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_STABILIZED) )
+ while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS) )
;
- // minimum PLL clock frequency is 80 MHz in range 00 (96 here so okay)
- // frequency is crystal * multiplier / divisor = 16Mhz * 12 / 2 = 96Mhz
+ // PLL output clock frequency in range 80 - 160 MHz needs CKGR_PLL = 00
+ // PLL output clock frequency in range 150 - 180 MHz needs CKGR_PLL = 10
+ // PLL output is MAINCK * multiplier / divisor = 16Mhz * 12 / 2 = 96Mhz
AT91C_BASE_PMC->PMC_PLLR =
PMC_PLL_DIVISOR(2) |
PMC_PLL_COUNT_BEFORE_LOCK(0x50) |
PMC_PLL_USB_DIVISOR(1);
// wait for PLL to lock
- while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_PLL_LOCK) )
+ while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK) )
;
// we want a master clock (MCK) to be PLL clock / 2 = 96Mhz / 2 = 48Mhz
- // as per datasheet, this register must be programmed in two operations
+ // datasheet recommends that this register is programmed in two operations
// when changing to PLL, program the prescaler first then the source
- AT91C_BASE_PMC->PMC_MCKR = PMC_CLK_PRESCALE_DIV_2;
+ AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;
// wait for main clock ready signal
- while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_MCK_READY) )
+ while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) )
;
// set the source to PLL
- AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | PMC_CLK_PRESCALE_DIV_2;
+ AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2 | AT91C_PMC_CSS_PLL_CLK;
// wait for main clock ready signal
- while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_MCK_READY) )
+ while ( !(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) )
;
}
-static void Fatal(void)
-{
- for(;;);
+static void Fatal(void) {
+ for(;;);
}
-void UsbPacketReceived(BYTE *packet, int len)
-{
- int i, dont_ack=0;
- UsbCommand *c = (UsbCommand *)packet;
- volatile DWORD *p;
-
- if(len != sizeof(*c)) {
- Fatal();
- }
-
- switch(c->cmd) {
- case CMD_DEVICE_INFO:
- dont_ack = 1;
- c->cmd = CMD_DEVICE_INFO;
- c->arg[0] = DEVICE_INFO_FLAG_BOOTROM_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM |
- DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH;
- if(common_area.flags.osimage_present) c->arg[0] |= DEVICE_INFO_FLAG_OSIMAGE_PRESENT;
- UsbSendPacket(packet, len);
- break;
-
- case CMD_SETUP_WRITE:
- /* The temporary write buffer of the embedded flash controller is mapped to the
- * whole memory region, only the last 8 bits are decoded.
- */
- p = (volatile DWORD *)&_flash_start;
- for(i = 0; i < 12; i++) {
- p[i+c->arg[0]] = c->d.asDwords[i];
- }
- break;
-
- case CMD_FINISH_WRITE:
- p = (volatile DWORD *)&_flash_start;
- for(i = 0; i < 4; i++) {
- p[i+60] = c->d.asDwords[i];
- }
-
- /* Check that the address that we are supposed to write to is within our allowed region */
- if( ((c->arg[0]+AT91C_IFLASH_PAGE_SIZE-1) >= end_addr) || (c->arg[0] < start_addr) ) {
- /* Disallow write */
- dont_ack = 1;
- c->cmd = CMD_NACK;
- UsbSendPacket(packet, len);
- } else {
- /* Translate address to flash page and do flash, update here for the 512k part */
- AT91C_BASE_EFC0->EFC_FCR = MC_FLASH_COMMAND_KEY |
- MC_FLASH_COMMAND_PAGEN((c->arg[0]-(int)&_flash_start)/AT91C_IFLASH_PAGE_SIZE) |
- AT91C_MC_FCMD_START_PROG;
- }
-
- uint32_t sr;
-
- while(!((sr = AT91C_BASE_EFC0->EFC_FSR) & MC_FLASH_STATUS_READY))
- ;
- if(sr & (MC_FLASH_STATUS_LOCKE | MC_FLASH_STATUS_PROGE)) {
- dont_ack = 1;
- c->cmd = CMD_NACK;
- UsbSendPacket(packet, len);
- }
- break;
-
- case CMD_HARDWARE_RESET:
- USB_D_PLUS_PULLUP_OFF();
- AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
- break;
-
- case CMD_START_FLASH:
- if(c->arg[2] == START_FLASH_MAGIC) bootrom_unlocked = 1;
- else bootrom_unlocked = 0;
- {
- int prot_start = (int)&_bootrom_start;
- int prot_end = (int)&_bootrom_end;
- int allow_start = (int)&_flash_start;
- int allow_end = (int)&_flash_end;
- int cmd_start = c->arg[0];
- int cmd_end = c->arg[1];
-
- /* Only allow command if the bootrom is unlocked, or the parameters are outside of the protected
- * bootrom area. In any case they must be within the flash area.
- */
- if( (bootrom_unlocked || ((cmd_start >= prot_end) || (cmd_end < prot_start)))
- && (cmd_start >= allow_start) && (cmd_end <= allow_end) ) {
- start_addr = cmd_start;
- end_addr = cmd_end;
- } else {
- start_addr = end_addr = 0;
- dont_ack = 1;
- c->cmd = CMD_NACK;
- UsbSendPacket(packet, len);
- }
- }
- break;
-
- default:
- Fatal();
- break;
- }
-
- if(!dont_ack) {
- c->cmd = CMD_ACK;
- UsbSendPacket(packet, len);
- }
+void UsbPacketReceived(uint8_t *packet, int len) {
+ int i, dont_ack=0;
+ UsbCommand* c = (UsbCommand *)packet;
+ volatile uint32_t *p;
+
+ if(len != sizeof(UsbCommand)) Fatal();
+
+ uint32_t arg0 = (uint32_t)c->arg[0];
+
+ switch(c->cmd) {
+ case CMD_DEVICE_INFO: {
+ dont_ack = 1;
+ arg0 = DEVICE_INFO_FLAG_BOOTROM_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM |
+ DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH;
+ if(common_area.flags.osimage_present)
+ arg0 |= DEVICE_INFO_FLAG_OSIMAGE_PRESENT;
+
+ cmd_send(CMD_DEVICE_INFO,arg0,1,2,0,0);
+ } break;
+
+ case CMD_SETUP_WRITE: {
+ /* The temporary write buffer of the embedded flash controller is mapped to the
+ * whole memory region, only the last 8 bits are decoded.
+ */
+ p = (volatile uint32_t *)&_flash_start;
+ for(i = 0; i < 12; i++)
+ p[i+arg0] = c->d.asDwords[i];
+ } break;
+
+ case CMD_FINISH_WRITE: {
+ uint32_t* flash_mem = (uint32_t*)(&_flash_start);
+ for ( int j=0; j<2; j++) {
+ for(i = 0+(64*j); i < 64+(64*j); i++) {
+ flash_mem[i] = c->d.asDwords[i];
+ }
+
+ uint32_t flash_address = arg0 + (0x100*j);
+
+ /* Check that the address that we are supposed to write to is within our allowed region */
+ if( ((flash_address+AT91C_IFLASH_PAGE_SIZE-1) >= end_addr) || (flash_address < start_addr) ) {
+ /* Disallow write */
+ dont_ack = 1;
+ cmd_send(CMD_NACK,0,0,0,0,0);
+ } else {
+ uint32_t page_n = (flash_address - ((uint32_t)flash_mem)) / AT91C_IFLASH_PAGE_SIZE;
+ /* Translate address to flash page and do flash, update here for the 512k part */
+ AT91C_BASE_EFC0->EFC_FCR = MC_FLASH_COMMAND_KEY |
+ MC_FLASH_COMMAND_PAGEN(page_n) |
+ AT91C_MC_FCMD_START_PROG;
+ }
+
+ // Wait until flashing of page finishes
+ uint32_t sr;
+ while(!((sr = AT91C_BASE_EFC0->EFC_FSR) & AT91C_MC_FRDY));
+ if(sr & (AT91C_MC_LOCKE | AT91C_MC_PROGE)) {
+ dont_ack = 1;
+ cmd_send(CMD_NACK,sr,0,0,0,0);
+ }
+ }
+ } break;
+
+ case CMD_HARDWARE_RESET: {
+ usb_disable();
+ AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
+ } break;
+
+ case CMD_START_FLASH: {
+ if(c->arg[2] == START_FLASH_MAGIC)
+ bootrom_unlocked = 1;
+ else
+ bootrom_unlocked = 0;
+
+ int prot_start = (int)&_bootrom_start;
+ int prot_end = (int)&_bootrom_end;
+ int allow_start = (int)&_flash_start;
+ int allow_end = (int)&_flash_end;
+ int cmd_start = c->arg[0];
+ int cmd_end = c->arg[1];
+
+ /* Only allow command if the bootrom is unlocked, or the parameters are outside of the protected
+ * bootrom area. In any case they must be within the flash area.
+ */
+ if( (bootrom_unlocked || ((cmd_start >= prot_end) || (cmd_end < prot_start))) &&
+ (cmd_start >= allow_start) &&
+ (cmd_end <= allow_end) ) {
+ start_addr = cmd_start;
+ end_addr = cmd_end;
+ } else {
+ start_addr = end_addr = 0;
+ dont_ack = 1;
+ cmd_send(CMD_NACK,0,0,0,0,0);
+ }
+ } break;
+
+ default: {
+ Fatal();
+ } break;
+ }
+
+ if(!dont_ack)
+ cmd_send(CMD_ACK,arg0,0,0,0,0);
}
static void flash_mode(int externally_entered)
start_addr = 0;
end_addr = 0;
bootrom_unlocked = 0;
+ byte_t rx[sizeof(UsbCommand)];
+ size_t rx_len;
+
+ usb_enable();
+ for (volatile size_t i=0; i<0x100000; i++)
+ ;
- UsbStart();
for(;;) {
WDT_HIT();
- UsbPoll(TRUE);
+ if (usb_poll()) {
+ rx_len = usb_read(rx,sizeof(UsbCommand));
+ if (rx_len)
+ UsbPacketReceived(rx,rx_len);
+ }
if(!externally_entered && !BUTTON_PRESS()) {
/* Perform a reset to leave flash mode */
- USB_D_PLUS_PULLUP_OFF();
+ usb_disable();
LED_B_ON();
AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
- for(;;);
+ for(;;)
+ ;
}
if(externally_entered && BUTTON_PRESS()) {
/* Let the user's button press override the automatic leave */
}
}
-extern char _osimage_entry;
+extern uint32_t _osimage_entry;
void BootROM(void)
{
//------------
GPIO_LED_C |
GPIO_LED_D;
- USB_D_PLUS_PULLUP_OFF();
- LED_D_OFF();
- LED_C_ON();
- LED_B_OFF();
- LED_A_OFF();
-
- // if 512K FLASH part - TODO make some defines :)
- if ((AT91C_BASE_DBGU->DBGU_CIDR | 0xf00) == 0xa00) {
- AT91C_BASE_EFC0->EFC_FMR =
- MC_FLASH_MODE_FLASH_WAIT_STATES(1) |
- MC_FLASH_MODE_MASTER_CLK_IN_MHZ(0x48);
- AT91C_BASE_EFC1->EFC_FMR =
- MC_FLASH_MODE_FLASH_WAIT_STATES(1) |
- MC_FLASH_MODE_MASTER_CLK_IN_MHZ(0x48);
- } else {
- AT91C_BASE_EFC0->EFC_FMR =
- MC_FLASH_MODE_FLASH_WAIT_STATES(0) |
- MC_FLASH_MODE_MASTER_CLK_IN_MHZ(48);
- }
+// USB_D_PLUS_PULLUP_OFF();
+ usb_disable();
+ LED_D_OFF();
+ LED_C_ON();
+ LED_B_OFF();
+ LED_A_OFF();
+
+ AT91C_BASE_EFC0->EFC_FMR =
+ AT91C_MC_FWS_1FWS |
+ MC_FLASH_MODE_MASTER_CLK_IN_MHZ(48);
// Initialize all system clocks
ConfigClocks();
if(!common_area_present){
/* Common area not ok, initialize it */
- int i; for(i=0; i<sizeof(common_area); i++) { /* Makeshift memset, no need to drag util.c into this */
+ int i;
+ /* Makeshift memset, no need to drag util.c into this */
+ for(i=0; i<sizeof(common_area); i++)
((char*)&common_area)[i] = 0;
- }
+
common_area.magic = COMMON_AREA_MAGIC;
common_area.version = 1;
common_area.flags.bootrom_present = 1;
flash_mode(1);
} else if(BUTTON_PRESS()) {
flash_mode(0);
- } else if(*(uint32_t*)&_osimage_entry == 0xffffffffU) {
+ } else if(_osimage_entry == 0xffffffffU) {
flash_mode(1);
} else {
// jump to Flash address of the osimage entry point (LSBit set for thumb mode)
- asm("bx %0\n" : : "r" ( ((int)&_osimage_entry) | 0x1 ) );
+ __asm("bx %0\n" : : "r" ( ((int)&_osimage_entry) | 0x1 ) );
}
}
projects / proxmark3-svn / blobdiff