prepare for interrupt support in the next few days

[my-code/arm.git] / betty / system.c

diff --git a/betty/system.c b/betty/system.c
index 4876802..ef18b57 100644 (file)
--- a/betty/system.c
+++ b/betty/system.c
@@ -11,11 +11,6 @@
  * functions
  */
 
-void mmap_init(u8 memtype) {
-
-       MEMMAP=memtype;
-}
-
 void pll_init(void) {
 
        /* configuration */
@@ -31,9 +26,106 @@ void pll_init(void) {
                continue;
 }
 
-void pause(int cnt) {
+void ext_mem_init(void) {
+
+       /*
+        * flash at bank0 and bank:
+        *
+        * idle clocks between rad & write: 0+1
+        * length of read access: 1+3
+        * bls lines high during write access
+        * length of write access: 0+extra
+        * no write protect, no burst-rom
+        * 16 bit data width
+        *
+        */
+
+       BCFG0=0x10000420;       // bank 0
+       BCFG2=0x10000420;       // bank 2
+
+       /*
+        * lcd at bank 1:
+        *
+        * idle clocks between rad & write: 2+1
+        * length of read access: 2+3
+        * bls lines low during write access
+        * length of write access: 1+extra
+        * no write protect, no burst-rom
+        * 8 bit data width
+        *
+        */
+
+       BCFG1=0x00000c42;       // bank 1
+}
+
+void pin_init(void) {
+
+       /*
+        * pinsel 0
+        *
+        * uart0: tx, rx
+        *
+        */
+
+       PINSEL0=0x00000005;
+
+       /*
+        * pinsel 1
+        *
+        * p0.30: eint3
+        *
+        */
+
+       PINSEL1=0x20000000;
+
+       /*
+        * pin select 2
+        *
+        * orig fw ->    d    6    0    4    1    d    4
+        *            1101 0110 0000 0100 0001 1101 0100
+        *
+        * this fw ->    d    e    0    4    9    d    4
+        *            1101 1110 0000 0100 1001 1101 0100
+        *
+        * differences:
+        *
+        *   - p3.26 should be chip select for ext mem bank 1
+        *   - p3.0 should be address line 0
+        *
+        * explanation: maybe bcfg1 config implies these settings
+        *
+        */
+
+       //PINSEL2=0xd6041d4;
+       PINSEL2=0xde049d4;
+
+       /*
+        * gpio config
+        *
+        * buttons:
+        *
+        * out: p2.18 - p2.24 (+ pull high)
+        * in: p0.30, p0.{27,28}, p3.{20,21}, p0.22, p0.13
+        *
+        */
+
+       // nothing to do for inputs (default: 0x00000000)
+       IODIR2=((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
+       IOSET2=((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
+}
+
+void mmap_init(u8 memtype) {
+
+       if(memtype==MEMTYPE_RESERVED)
+               return;
+
+       MEMMAP=memtype;
+}
+
+void pause(u32 cnt) {
 
        while(cnt--)
+               //continue;
                asm volatile ("nop");
 }