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Samsung YH925: Reset the LCD orientation to what the OF expects before branching to it in dualbooting

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Author: Mark Arigo

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22659 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-09-08 13:57:13 +00:00
parent b54b066516
commit e2ccabf89d
2 changed files with 24 additions and 1 deletions
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13
bootloader/main-pp.c
View file

@ -47,6 +47,11 @@
#include "usb.h"
#include "usb_drv.h"
#endif
#if defined(SAMSUNG_YH925)
/* this function (in lcd-yh925.c) resets the screen orientation for the OF
* for use with dualbooting */
void lcd_reset(void);
#endif
/* Show the Rockbox logo - in show_logo.c */
extern int show_logo(void);
@ -575,7 +580,7 @@ void* main(void)
The rest of the loading is done in crt0.S.
1) First try reading from the hidden partition (on Sansa only).
2) Next try a decrypted mi4 file in /System/OF.mi4
3) Finally, try a raw firmware binary in /System/OF.mi4. It should be
3) Finally, try a raw firmware binary in /System/OF.bin. It should be
a mi4 firmware decrypted and header stripped using mi4code.
*/
printf("Loading original firmware...");
@ -615,6 +620,9 @@ void* main(void)
printf("Can't load /System/OF.mi4");
printf(strerror(rc));
} else {
#if defined(SAMSUNG_YH925)
lcd_reset();
#endif
return (void*)loadbuffer;
}
@ -624,6 +632,9 @@ void* main(void)
printf("Can't load /System/OF.bin");
printf(strerror(rc));
} else {
#if defined(SAMSUNG_YH925)
lcd_reset();
#endif
return (void*)loadbuffer;
}

12
firmware/target/arm/samsung/yh925/lcd-yh925.c
View file

@ -190,6 +190,18 @@ void lcd_set_flip(bool flip)
lcd_write_reg(R_ENTRY_MODE, 0x1028);
}
/* Reset the LCD prior to booting the OF */
#ifdef BOOTLOADER
void lcd_reset(void)
{
lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x0315);
lcd_write_reg(R_ENTRY_MODE, 0x1028);
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, 0x7f00);
lcd_write_reg(R_VERT_RAM_ADDR_POS, 0xaf10);
lcd_write_reg(R_RAM_ADDR_SET, 0x0000);
}
#endif
/* LCD init */
void lcd_init_device(void)
{