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mkamsboot: don't boot OF if USB is plugged (AMSv1 only)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27618 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-07-29 23:15:55 +00:00
parent aa2fca384a
commit b0db713970
3 changed files with 48 additions and 121 deletions
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70
rbutil/mkamsboot/dualboot/dualboot.S
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@ -90,77 +90,17 @@ uclcopy:
str r1, [r0]
/* TODO : M200V4 ? */
#if defined(SANSA_CLIP) || defined(SANSA_CLIPV2)
#define USB_PIN 6
#elif defined(SANSA_FUZE) || defined(SANSA_E200V2)
#define USB_PIN 3
#endif
#ifdef USB_PIN /* TODO : remove this check when we'll have an USB driver */
#ifdef SANSA_CLIPV2 /* TODO : remove this check when we'll have an USB driver */
ldr r0, =GPIOA
mov r1, #0
str r1, [r0, #0x400]
ldr r1, [r0, #(4*(1<<USB_PIN))]
ldr r1, [r0, #(4*(1<<6))]
cmp r1, #0
bne boot_of
#endif
#if defined(SANSA_C200V2)
/* Instead of checking the GPIO, check the audio master IRQ_ENRD0
* USB_STATUS bit on C200V2 */
ldr r0, =CGU_PERI
ldr r1, [r0]
/* enable i2c audio master clock */
orr r1, r1, #(1<<17)
/* make sure 24MHz clk_main is selected */
bic r1, r1, #0x7f
str r1, [r0]
ldr r0, =I2C_BASE
/* disable i2c interrupts */
mov r1, #0
str r1, [r0, #I2C_IMR]
/* setup prescaler */
mov r1, #I2C_PRESCALER_LOW
str r1, [r0, #I2C_CPSR0]
mov r1, #I2C_PRESCALER_HIGH
str r1, [r0, #I2C_CPSR1]
/* setup i2c slave address */
mov r1, #(AS3514_I2C_ADDR << 1)
str r1, [r0, #I2C_SLAD0]
mov r2, #0x51
str r2, [r0, #I2C_CNTRL]
/* wait for not busy */
1:
ldr r1, [r0, #I2C_SR]
tst r1, #1
bne 1b
/* start read of irq_enrd0 */
mov r1, #AS3514_IRQ_ENRD0
str r1, [r0, #I2C_SADDR]
orr r2, r2, #(1 << 1)
str r2, [r0, #I2C_CNTRL]
mov r1, #1
str r1, [r0, #I2C_DACNT]
/* wait for transfer to finish */
1:
ldr r1, [r0, #I2C_DACNT]
cmp r1, #0
bne 1b
/* load result and test USB_STATUS bit */
ldr r1, [r0, #I2C_DATA]
tst r1, #(1 << 3)
bne boot_of
#endif
/* Here are model specific tests, for dual boot without a computer */
/* All models use left button */
/* /!\ Right button for c200v2 (left button is unkwown) */
/* Here are model specific tests for dual boot */
/* All models but c200v2 use left button */
/* TODO: Left button for c200v2 too (needs DBOP code) */
#ifdef SANSA_CLIP
.set row, (1<<5) /* enable output on C5 */