From 9daf658ef18f1467ca949b7a4d4b6d428c8f4ce4 Mon Sep 17 00:00:00 2001
From: Jens Arnold <amiconn@rockbox.org>
Date: Fri, 2 Nov 2007 01:18:14 +0000
Subject: [PATCH] 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
---
 firmware/target/arm/ipod/video/lcd-video.c | 32 ++++++++++++++++++++--
 1 file 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 8caa1b9c50..5c069f638b 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 ***/