From 616746c2e01a0425a9fc62d24153d88079f0daac Mon Sep 17 00:00:00 2001
From: henryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>
Date: Wed, 21 Nov 2007 04:45:15 +0000
Subject: Commit status quo: Start adding iso 14443 layer 3a code Currently
 working on fiq for pio data change to reset tc0 via swtrg

git-svn-id: https://svn.openpcd.org:2342/trunk@336 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
---
 openpicc/os/boot/Cstartup_SAM7.c |  6 +++
 openpicc/os/boot/boot.s          | 93 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 97 insertions(+), 2 deletions(-)

(limited to 'openpicc/os/boot')

diff --git a/openpicc/os/boot/Cstartup_SAM7.c b/openpicc/os/boot/Cstartup_SAM7.c
index 72c9917..fdcafd3 100644
--- a/openpicc/os/boot/Cstartup_SAM7.c
+++ b/openpicc/os/boot/Cstartup_SAM7.c
@@ -26,6 +26,7 @@
 //*----------------------------------------------------------------------------
 void AT91F_LowLevelInit (void)
 {
+    char i=0;
     AT91PS_PMC pPMC = AT91C_BASE_PMC;
 
     //* Set flash wait state
@@ -65,4 +66,9 @@ void AT91F_LowLevelInit (void)
 
     pPMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK;
     while (!(pPMC->PMC_SR & AT91C_PMC_MCKRDY));
+    
+    /* Copy IRQ vector table to RAM */
+    for(i=0; i<0x24; i++) *((char*)(0x00200000)+i) = *((char*)(0x00100000)+i);
+    /* Perform remap FIXME doesn't work*/
+    // AT91C_BASE_MC->MC_RCR = AT91C_MC_RCB;
 }
diff --git a/openpicc/os/boot/boot.s b/openpicc/os/boot/boot.s
index 6bd5db2..cbd9be7 100644
--- a/openpicc/os/boot/boot.s
+++ b/openpicc/os/boot/boot.s
@@ -23,7 +23,7 @@
 	/* Stack Sizes */
     .set  UND_STACK_SIZE, 0x00000004
     .set  ABT_STACK_SIZE, 0x00000004
-    .set  FIQ_STACK_SIZE, 0x00000004
+    .set  FIQ_STACK_SIZE, 0x00000400
     .set  IRQ_STACK_SIZE, 0X00000400
     .set  SVC_STACK_SIZE, 0x00000400
 
@@ -39,6 +39,20 @@
     .equ  I_BIT, 0x80               /* when I bit is set, IRQ is disabled */
     .equ  F_BIT, 0x40               /* when F bit is set, FIQ is disabled */
 
+.equ AT91C_BASE_AIC,  (0xFFFFF000)
+.equ AT91C_BASE_PIOA, 0xFFFFF400
+.equ AT91C_BASE_TC0,  0xFFFA0000
+.equ AT91C_TC_SWTRG,  (1 << 2)
+.equ PIO_DATA,        (1 << 27)
+.equ PIOA_SODR,       0x30
+.equ PIOA_CODR,       0x34
+.equ PIOA_PDSR,       0x3c
+.equ PIOA_IDR,        0x44
+.equ PIOA_ISR,        0x4c
+.equ TC_CCR,          0x00
+.equ AIC_EOICR,       (304)
+/*.equ PIO_LED1,        (1 << 25)*/
+.equ PIO_LED1,        (1 << 12)
 
 start:
 _start:
@@ -55,6 +69,11 @@ _mainCRTStartup:
     mov   sp, r0
     sub   r0, r0, #ABT_STACK_SIZE
     msr   CPSR_c, #MODE_FIQ|I_BIT|F_BIT /* FIQ Mode */
+    /* Preload registers for FIQ handler */
+    ldr     r10, =AT91C_BASE_PIOA
+    ldr     r12, =AT91C_BASE_TC0
+    ldr     r8, =AT91C_BASE_AIC
+    mov     r9, #AT91C_TC_SWTRG
     mov   sp, r0
     sub   r0, r0, #FIQ_STACK_SIZE
     msr   CPSR_c, #MODE_IRQ|I_BIT|F_BIT /* IRQ Mode */
@@ -147,7 +166,7 @@ endless_loop:
 	ldr   pc, _dabt						/* data abort - _dabt		*/
 	nop									/* reserved					*/
 	ldr   pc, [pc,#-0xF20]				/* IRQ - read the AIC		*/
-	ldr   pc, _fiq						/* FIQ - _fiq				*/
+	ldr   pc, [pc,#-0xF20]				/* FIQ - read the AIC		*/
 
 _undf:  .word __undf                    /* undefined				*/
 _swi:   .word swi_handler				/* SWI						*/
@@ -159,3 +178,73 @@ __undf: b     .                         /* undefined				*/
 __pabt: b     .                         /* program abort			*/
 __dabt: b     .                         /* data abort				*/
 __fiq:  b     .                         /* FIQ						*/
+
+/* Following is from openpcd/firmware/src/start/Cstartup_app.S */
+#define LED_TRIGGER
+/*#define CALL_PIO_IRQ_DEMUX*/
+        
+        .text
+        .arm
+        .section .fastrun, "ax"
+        
+        .global fiq_handler
+        .func fiq_handler
+fiq_handler:
+                /* code that uses pre-initialized FIQ reg */
+                /* r8   AT91C_BASE_AIC (dfu init)
+                   r9   AT91C_TC_SWTRG
+                   r10  AT91C_BASE_PIOA
+                   r11  tmp
+                   r12  AT91C_BASE_TC0
+                   r13  stack
+                   r14  lr
+                 */
+
+                ldr     r8, [r10, #PIOA_ISR]
+                tst     r8, #PIO_DATA           /* check for PIO_DATA change */
+                ldrne   r11, [r10, #PIOA_PDSR]
+                tstne   r11, #PIO_DATA          /* check for PIO_DATA == 1 */
+                strne   r9, [r12, #TC_CCR]      /* software trigger */
+#ifdef LED_TRIGGER
+                movne   r11, #PIO_LED1
+                strne   r11, [r10, #PIOA_CODR] /* enable LED */
+#endif
+
+#if 1
+                movne   r11, #PIO_DATA
+                strne   r11, [r10, #PIOA_IDR]   /* disable further PIO_DATA FIQ */
+#endif
+
+                /*- Mark the End of Interrupt on the AIC */
+                ldr     r11, =AT91C_BASE_AIC
+                str     r11, [r11, #AIC_EOICR]
+
+#ifdef LED_TRIGGER
+                mov     r11, #PIO_LED1
+                str     r11, [r10, #PIOA_SODR] /* disable LED */
+#endif
+
+#ifdef CALL_PIO_IRQ_DEMUX
+                /* push r0, r1-r3, r12, r14 onto FIQ stack */
+                /*stmfd   sp!, { r0-r3, r12, lr}
+                mov     r0, r8*/
+
+                /* enable interrupts while handling demux */
+                /* enable interrupts while handling demux */
+                /* msr  CPSR_c, #F_BIT | ARM_MODE_SVC */
+
+                /* Call C function, give PIOA_ISR as argument */
+                /*ldr     r11, =__pio_irq_demux
+                mov     r14, pc
+                bx      r11*/
+
+                /* msr  CPSR_c, #I_BIT | F_BIT | ARM_MODE_FIQ */
+                /*ldmia   sp!, { r0-r3, r12, lr }*/
+#endif
+
+                /*- Restore the Program Counter using the LR_fiq directly in the PC */
+                subs        pc, lr, #4
+
+        .size   fiq_handler, . - fiq_handler
+        .endfunc
+        .end
-- 
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