X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f7e3ed82874bfd8951c90536bd7185d599d6dbf8..ab6bf11f3fbd32163ac79e1e65d15c496d4ff65e:/bootrom/bootrom.c

diff --git a/bootrom/bootrom.c b/bootrom/bootrom.c
index 04bc14be..fc1c8a2c 100644
--- a/bootrom/bootrom.c
+++ b/bootrom/bootrom.c
@@ -1,4 +1,13 @@
+//-----------------------------------------------------------------------------
+// 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_hid.h"
 
 struct common_area common_area __attribute__((section(".commonarea")));
 unsigned int start_addr, end_addr, bootrom_unlocked;
@@ -21,21 +30,22 @@ static void ConfigClocks(void)
 		(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) |
@@ -44,23 +54,23 @@ static void ConfigClocks(void)
 		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) )
 		;
 }
 
@@ -120,9 +130,9 @@ void UsbPacketReceived(uint8_t *packet, int len)
 
             uint32_t sr;
 
-            while(!((sr = AT91C_BASE_EFC0->EFC_FSR) & MC_FLASH_STATUS_READY))
+            while(!((sr = AT91C_BASE_EFC0->EFC_FSR) & AT91C_MC_FRDY))
                 ;
-            if(sr & (MC_FLASH_STATUS_LOCKE | MC_FLASH_STATUS_PROGE)) {
+            if(sr & (AT91C_MC_LOCKE | AT91C_MC_PROGE)) {
         	    dont_ack = 1;
                     c->cmd = CMD_NACK;
                     UsbSendPacket(packet, len);
@@ -248,19 +258,9 @@ void BootROM(void)
     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);
-    }
+	AT91C_BASE_EFC0->EFC_FMR =
+		AT91C_MC_FWS_1FWS |
+		MC_FLASH_MODE_MASTER_CLK_IN_MHZ(48);
 
     // Initialize all system clocks
     ConfigClocks();
@@ -301,6 +301,6 @@ void BootROM(void)
 	    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 ) );
     }
 }