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mkximxboot/fuze+: add power button delay to power on

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Only boot to rockbox if the power button is hold sufficiently long.
For consistency, use the same mechanism as the OF:
- read PSWITCH 550000 times
- boot if PSWITCH=1 at least 400000 out of 550000 times
Only apply the delay if Volume Down is not hold,
so that the OF and RB delay don't cumulate.

Change-Id: I1e8a4cd108c56bf784fcf1c320f7a001ef161701
This commit is contained in:
Amaury Pouly 2012-02-28 00:00:58 +01:00
parent 9f48f5f207
commit 15c69b8baf
3 changed files with 34 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

13
rbutil/mkimxboot/dualboot.c
View file

@ -2,8 +2,13 @@
#include "dualboot.h"
unsigned char dualboot_fuzeplus[36] = {
0x18, 0x20, 0x9f, 0xe5, 0x00, 0x20, 0x92, 0xe5, 0x01, 0x01, 0x12, 0xe3, 0x00, 0x00, 0xa0, 0x03,
0x1e, 0xff, 0x2f, 0x01, 0x00, 0x00, 0x81, 0xe5, 0x01, 0x00, 0xa0, 0xe3, 0x1e, 0xff, 0x2f, 0xe1,
0x10, 0x86, 0x01, 0x80
unsigned char dualboot_fuzeplus[128] = {
0x70, 0x40, 0x2d, 0xe9, 0x5c, 0x20, 0x9f, 0xe5, 0x00, 0x20, 0x92, 0xe5, 0x01, 0x01, 0x12, 0xe3,
0x00, 0x00, 0xa0, 0x03, 0x1e, 0xff, 0x2f, 0x01, 0x4c, 0x20, 0x9f, 0xe5, 0x00, 0x40, 0xa0, 0xe3,
0x48, 0x30, 0x9f, 0xe5, 0x00, 0x30, 0x93, 0xe5, 0x03, 0x35, 0xa0, 0xe1, 0x23, 0x3f, 0xa0, 0xe1,
0x01, 0x00, 0x53, 0xe3, 0x03, 0x40, 0x84, 0x00, 0x01, 0x20, 0x52, 0xe2, 0xf7, 0xff, 0xff, 0x1a,
0x2c, 0x20, 0x9f, 0xe5, 0x02, 0x00, 0x54, 0xe1, 0x02, 0x00, 0x00, 0x3a, 0x00, 0x00, 0x81, 0xe5,
0x01, 0x00, 0xa0, 0xe3, 0x70, 0x80, 0xbd, 0xe8, 0x18, 0x00, 0x9f, 0xe5, 0x18, 0x10, 0x9f, 0xe5,
0x00, 0x10, 0x80, 0xe5, 0xfb, 0xff, 0xff, 0xea, 0x10, 0x86, 0x01, 0x80, 0x70, 0x64, 0x08, 0x00,
0xc0, 0x40, 0x04, 0x80, 0x80, 0x1a, 0x06, 0x00, 0x00, 0x41, 0x04, 0x80, 0x01, 0x00, 0x77, 0x3e
};

2
rbutil/mkimxboot/dualboot.h
View file

@ -1,3 +1,3 @@
/* Generated by bin2c */
extern unsigned char dualboot_fuzeplus[36];
extern unsigned char dualboot_fuzeplus[128];

26
rbutil/mkimxboot/dualboot/dualboot.S
View file

@ -23,6 +23,7 @@
.global start
@ int start(uint32_t arg, uint32_t *result_id)
start:
stmfd sp!, {r4-r6,lr}
#if defined(SANSA_FUZEPLUS)
/* If volume down key is hold, return so that the OF can boot */
ldr r2, =0x80018610 @ HW_PINCTRL_DIN1
@ -30,10 +31,31 @@ start:
tst r2, #0x40000000 @ bit 30, active low
moveq r0, #0 @ return 0, continue boot
bxeq lr
/* otherwise jump to section given as argument */
/* otherwise monitor the power button for a short time */
ldr r2, =550000 @ loop count
ldr r4, =0 @ number of times PSWITCH was 1
pswitch_monitor_loop:
ldr r3, =0x800440c0 @ HW_POWER_STS
ldr r3, [r3]
mov r3, r3, lsl#10
mov r3, r3, lsr#30 @ extract PSWITCH
cmp r3, #1
addeq r4, r3 @ add one if PSWITCH=1 (means power hold)
subs r2, #1
bne pswitch_monitor_loop
/* power down if power wasn't hold long enough */
ldr r2, =400000
cmp r4, r2
bcc power_down
/* jump to section given as argument */
str r0, [r1]
mov r0, #1
bx lr
ldmfd sp!, {r4-r6,pc}
power_down:
ldr r0, =0x80044100 @ HW_POWER_RESET
ldr r1, =0x3E770001 @ unlock key + power down
str r1, [r0]
b power_down
#else
#error No target defined !
#endif