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Fix usbgecko detection.

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Avoid hangs when no usbgecko is present.
This commit is contained in:
dhewg 2009-04-16 20:17:56 +02:00 committed by bushing
parent 4f1ed52dd7
commit 75958b2508
1 changed files with 26 additions and 6 deletions
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32
gecko.c
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@ -42,8 +42,22 @@ static u32 _gecko_command(u32 command)
write32(EXI1_CSR, 0xd0); write32(EXI1_CSR, 0xd0);
write32(EXI1_DATA, command); write32(EXI1_DATA, command);
write32(EXI1_CR, 0x19); write32(EXI1_CR, 0x19);
i = 1000; while (read32(EXI1_CR) & 1);
while ((read32(EXI1_CR) & 1) && (i--)); i = read32(EXI1_DATA);
write32(EXI1_CSR, 0);
return i;
}
static u32 _gecko_getid(void)
{
u32 i;
// Memory Card Port B (Channel 1, Device 0, Frequency 3 (32Mhz Clock))
write32(EXI1_CSR, 0xd0);
write32(EXI1_DATA, 0);
write32(EXI1_CR, 0x19);
while (read32(EXI1_CR) & 1);
write32(EXI1_CR, 0x39);
while (read32(EXI1_CR) & 1);
i = read32(EXI1_DATA); i = read32(EXI1_DATA);
write32(EXI1_CSR, 0); write32(EXI1_CSR, 0);
return i; return i;
@ -93,11 +107,17 @@ static u32 _gecko_checkrecv(void)
static int gecko_isalive(void) static int gecko_isalive(void)
{ {
u32 i = 0; u32 i;
i = _gecko_command(0x90000000);
if (i&0x04700000) i = _gecko_getid();
return 1; if (i != 0x00000000)
return 0; return 0;
i = _gecko_command(0x90000000);
if ((i & 0xFFFF0000) != 0x04700000)
return 0;
return 1;
} }
static void gecko_flush(void) static void gecko_flush(void)