iPod Video LCD driver: Reintroduce the simple method of waiting for update completion for use in the bootloader, because bootloaders don't enable interrupts and hence the tick task won't work. Slower than the full driver, but still faster than the old one, because it first transfers the data, and then polls the BCM.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15399 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 30 insertions, 2 deletions

diff --git a/firmware/target/arm/ipod/video/lcd-video.c b/firmware/target/arm/ipod/video/lcd-video.c
index 8caa1b9..5c069f6 100644
--- a/firmware/target/arm/ipod/video/lcd-video.c
+++ b/firmware/target/arm/ipod/video/lcd-video.c
@@ -62,7 +62,7 @@ enum lcd_status {
 };
 
 struct {
-    long update_timeout;         
+    long update_timeout;
     enum lcd_status state;
     bool blocked;
 #if NUM_CORES > 1
@@ -107,6 +107,7 @@ static void bcm_setup_rect(unsigned x, unsigned y,
     BCM_DATA32 = y + height - 1;
 }
 
+#ifndef BOOTLOADER
 static void lcd_tick(void)
 {
     /* No set_irq_level - already in interrupt context */
@@ -186,6 +187,29 @@ static void lcd_unblock_and_update(void)
     set_irq_level(oldlevel);
 }
 
+#else /* BOOTLOADER */
+
+#define lcd_block_tick()
+
+static void lcd_unblock_and_update(void)
+{
+    unsigned data;
+    
+    if (lcd_state.state != LCD_INITIAL)
+    {
+        data = bcm_read32(0x1F8);
+        while (data == 0xFFFA0005 || data == 0xFFFF)
+        {
+            yield();
+            data = bcm_read32(0x1F8);
+        }
+    }
+    bcm_write32(0x1F8, 0xFFFA0005);  /* Kick off update */
+    BCM_CONTROL = 0x31;
+    lcd_state.state = LCD_IDLE;
+}
+#endif /* BOOTLOADER */
+
 /*** hardware configuration ***/
 
 void lcd_set_contrast(int val)
@@ -210,11 +234,15 @@ void lcd_set_flip(bool yesno)
 /* LCD init */
 void lcd_init_device(void)
 {
+    bcm_setup_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
     lcd_state.blocked = false;
     lcd_state.state = LCD_INITIAL;
+#ifndef BOOTLOADER
+#if NUM_CORES > 1
     corelock_init(&lcd_state.cl);
-    bcm_setup_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+#endif
     tick_add_task(&lcd_tick);
+#endif /* !BOOTLOADER */
 }
 
 /*** update functions ***/