Various Nano2g changes - enable the rest of crt0.S (including clock setup) and make the nano2g bootloader do something useful (displaying gpio ports). Also add checks for the fifo-full condition in the LCD driver - required after enabling all the crt0.S inits

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21948 a1c6a512-1295-4272-9138-f99709370657

bootloader/ipodnano2g.c

@@ -30,6 +30,7 @@
 #include "cpu.h"
 #include "system.h"
 #include "lcd.h"
+#include "i2c-s5l8700.h"
 #include "kernel.h"
 #include "thread.h"
 #include "storage.h"
@@ -49,13 +50,51 @@ char version[] = APPSVERSION;
 /* Show the Rockbox logo - in show_logo.c */
 extern int show_logo(void);
 
+extern int line;
+
 void main(void)
 {
+    int i;
+
+    system_init();
+    i2c_init();
+    kernel_init();
+
+    enable_irq();
+
     lcd_init();
 
-    show_logo();
+    _backlight_init();
 
-    /* Do nothing... */
+    lcd_puts_scroll(0,0,"+++ this is a very very long line to test scrolling. ---");
+    verbose = 0;
+    i = 0;
+    while (!button_hold()) {
+        line = 1;
+
+        printf("i=%d",i++);
+        printf("TBCNT:   %08x",TBCNT);
+        printf("GPIO  0: %08x",PDAT0);
+        printf("GPIO  1: %08x",PDAT1);
+        printf("GPIO  2: %08x",PDAT2);
+        printf("GPIO  3: %08x",PDAT3);
+        printf("GPIO  4: %08x",PDAT4);
+        printf("GPIO  5: %08x",PDAT5);
+        printf("GPIO  6: %08x",PDAT6);
+        printf("GPIO  7: %08x",PDAT7);
+        printf("GPIO 10: %08x",PDAT10);
+        printf("GPIO 11: %08x",PDAT11);
+        printf("GPIO 13: %08x",PDAT13);
+        printf("GPIO 14: %08x",PDAT14);
+
+        lcd_update();
+    }
+
+    disable_irq();
+
+    /* Branch back to iBugger entry point */
+    asm volatile("ldr pc, =0x08640568");
+
+    /* We never reach here */
     while(1);
 }
-

firmware/SOURCES

@@ -1303,6 +1303,7 @@ target/arm/s5l8700/udacodec-meizu.c
 #ifdef IPOD_NANO2G
 target/arm/s5l8700/kernel-s5l8700.c
 target/arm/s5l8700/ipodnano2g/backlight-nano2g.c
+target/arm/s5l8700/ipodnano2g/button-nano2g.c
 target/arm/s5l8700/ipodnano2g/lcd-nano2g.c
 #endif
 

firmware/export/s5l8700.h

@@ -19,6 +19,8 @@
  *
  ****************************************************************************/
 
+#include <inttypes.h>
+
 #define REG8_PTR_T  volatile uint8_t *
 #define REG16_PTR_T volatile uint16_t *
 #define REG32_PTR_T volatile uint32_t *

firmware/target/arm/s5l8700/crt0.S

@@ -82,7 +82,6 @@ newstart2:
 //    orr r0, r0, r2
 //    str r0, [r1] // switch backlight on
 
-#if CONFIG_CPU==S5L8700
     ldr r1, =0x3c500000 // CLKCON
     ldr r0, =0x00800080
     str r0, [r1]
@@ -90,7 +89,11 @@ newstart2:
     mov r0, #0
     str r0, [r1]
     ldr r1, =0x3c500004 // PLL0PMS
+#ifdef IPOD_NANO2G
+    ldr r0, =0x21200
+#else
     ldr r0, =0x1ad200
+#endif
     str r0, [r1]
     ldr r1, =0x3c500014 // PLL0LCNT
     ldr r0, =8100
@@ -226,6 +229,7 @@ newstart2:
     mcr 15, 0, r0, c1, c0, 0 // enable protection unit
 
     
+#if CONFIG_CPU==S5L8700
     /* Copy interrupt vectors to iram */
     ldr     r2, =_intvectstart
     ldr     r3, =_intvectend

firmware/target/arm/s5l8700/ipodnano2g/lcd-nano2g.c

@@ -60,21 +60,28 @@ static int xoffset; /* needed for flip */
 
 static inline void s5l_lcd_write_cmd_data(int cmd, int data)
 {
+    while (LCD_STATUS & 0x10);
     LCD_WCMD = cmd >> 8;
+    while (LCD_STATUS & 0x10);
     LCD_WCMD = cmd & 0xff;
 
+    while (LCD_STATUS & 0x10);
     LCD_WDATA = data >> 8;
+    while (LCD_STATUS & 0x10);
     LCD_WDATA = data & 0xff;
 }
 
 static inline void s5l_lcd_write_cmd(unsigned short cmd)
 {
+    while (LCD_STATUS & 0x10);
     LCD_WCMD = cmd;
 }
 
 static inline void s5l_lcd_write_data(int data)
 {
+    while (LCD_STATUS & 0x10);
     LCD_WDATA = data >> 8;
+    while (LCD_STATUS & 0x10);
     LCD_WDATA = data & 0xff;
 }
 
@@ -185,7 +192,9 @@ void lcd_update(void)
         for (x = 0; x < LCD_WIDTH; x++) {
             pixel = *(p++);
 
+            while (LCD_STATUS & 0x10);
             LCD_WDATA = (pixel & 0xff00) >> 8;
+            while (LCD_STATUS & 0x10);
             LCD_WDATA = pixel & 0xff;
         }
     }