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Flash Manufacturer/ID in Debug->View HW Info, if this gives valid info you have an in-system programmable Flash (pre-study for Rockbox in Flash)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3679 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2003-05-17 20:40:30 +00:00
parent 67bea32c08
commit ceba6f863e
1 changed files with 49 additions and 0 deletions
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49
apps/debug_menu.c
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@ -188,6 +188,42 @@ bool dbg_mpeg_thread(void)
}
#endif
/* Tool function to read the flash manufacturer and type, if available.
Only chips which could be reprogrammed in system will return values.
(The mode switch addresses vary between flash manufacturers, hence addr1/2) */
bool dbg_flash_id(unsigned* p_manufacturer, unsigned* p_device, unsigned addr1, unsigned addr2)
{
unsigned not_manu, not_id; /* read values before switching to ID mode */
unsigned manu, id; /* read values when in ID mode */
volatile unsigned char* flash = (unsigned char*)0x2000000; /* flash mapping */
not_manu = flash[0]; /* read the normal content */
not_id = flash[1]; /* should be 'A' (0x41) and 'R' (0x52) from the "ARCH" marker */
flash[addr1] = 0xAA; /* enter command mode */
flash[addr2] = 0x55;
flash[addr1] = 0x90; /* ID command */
sleep(HZ/50); /* Atmel wants 20ms pause here */
manu = flash[0]; /* read the IDs */
id = flash[1];
flash[0] = 0xF0; /* reset flash (back to normal read mode) */
sleep(HZ/50); /* Atmel wants 20ms pause here */
/* I assume success if the obtained values are different from
the normal flash content. This is not perfectly bulletproof, they
could theoretically be the same by chance, causing us to fail. */
if (not_manu != manu || not_id != id) /* a value has changed */
{
*p_manufacturer = manu; /* return the results */
*p_device = id;
return true; /* success */
}
return false; /* fail */
}
#ifdef HAVE_LCD_BITMAP
bool dbg_hw_info(void)
{
@ -200,6 +236,8 @@ bool dbg_hw_info(void)
unsigned char sec, sec2;
unsigned long tick;
bool is_12mhz;
unsigned manu, id; /* flash IDs */
bool got_id; /* flag if we managed to get the flash IDs */
if(PADR & 0x400)
usb_polarity = 0; /* Negative */
@ -224,6 +262,11 @@ bool dbg_hw_info(void)
is_12mhz = (current_tick - tick > HZ);
/* get flash ROM type */
got_id = dbg_flash_id(&manu, &id, 0x5555, 0x2AAA); /* try SST, Atmel, NexFlash */
if (!got_id)
got_id = dbg_flash_id(&manu, &id, 0x555, 0x2AA); /* try AMD, Macronix */
lcd_setmargins(0, 0);
lcd_setfont(FONT_SYSFIXED);
lcd_clear_display();
@ -248,6 +291,12 @@ bool dbg_hw_info(void)
snprintf(buf, 32, "Freq: %s", is_12mhz?"12MHz":"11.0592MHz");
lcd_puts(0, 6, buf);
if (got_id)
snprintf(buf, 32, "Flash: M=%02x D=%02x", manu, id);
else
snprintf(buf, 32, "Flash: M=?? D=??"); /* unknown, sorry */
lcd_puts(0, 7, buf);
lcd_update();
while(1)