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Gigabeat S: Move the LCD framebuffer address so that DRAM can be mapped flat between physical and virtual addresses. NO BOOTLOADER UPDATE SHOULD BE NEEDED. The firmware image now handles low-level system setup as well.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19935 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2009-02-07 10:09:13 +00:00
parent f747d9d39e
commit 4d3a020f27
6 changed files with 36 additions and 27 deletions
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10
firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c
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@ -27,6 +27,7 @@
#include "lcd-target.h"
#include "backlight-target.h"
#define MAIN_LCD_IDMAC_CHANNEL 14
#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
static volatile bool lcd_on = true;
@ -46,6 +47,15 @@ extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
/* LCD init */
void lcd_init_device(void)
{
/* Move the framebuffer */
#ifdef BOOTLOADER
/* Only do this once to avoid flicker */
memset(FRAME, 0x00, FRAME_SIZE);
#endif
IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL);
IPU_IMA_ADDR = ((0x1 << 16) | (MAIN_LCD_IDMAC_CHANNEL << 4)) + (1 << 3);
IPU_IMA_DATA = FRAME_PHYS_ADDR;
IPU_IDMAC_CHA_EN |= (1ul << MAIN_LCD_IDMAC_CHANNEL);
}
/* Update a fraction of the display. */