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dfu: fix EP0 IN trasnfers that are even multiple of 8 

We have to send a ZLP at the end of such transfers, otherwise the host
will time out at the end of the transfer.  This resulted in multi-second
delays for recognizing the SIMtrace hardware by the USB host.
This commit is contained in:
Harald Welte 2011-07-07 17:39:32 +02:00
parent 30cb576ca5
commit fe88b83e80
1 changed files with 14 additions and 4 deletions
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18
firmware/src/dfu/dfu.c
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@ -86,18 +86,20 @@ static void __dfufunc udp_init(void)
AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPCD_PIO_UDP_PUPv4);
}
static void __dfufunc udp_ep0_send_zlp(void);
/* Send Data through the control endpoint */
static void __dfufunc udp_ep0_send_data(const char *pData, u_int32_t length)
{
AT91PS_UDP pUdp = AT91C_BASE_UDP;
u_int32_t cpt = 0;
u_int32_t cpt = 0, len_remain = length;
AT91_REG csr;
DEBUGE("send_data: %u bytes ", length);
do {
cpt = MIN(length, 8);
length -= cpt;
cpt = MIN(len_remain, 8);
len_remain -= cpt;
while (cpt--)
pUdp->UDP_FDR[0] = *pData++;
@ -119,12 +121,20 @@ static void __dfufunc udp_ep0_send_data(const char *pData, u_int32_t length)
}
} while (!(csr & AT91C_UDP_TXCOMP));
} while (length);
} while (len_remain);
if (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) {
pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);
while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) ;
}
if ((length % 8) == 0) {
/* if the length is a multiple of the EP size, we need
* to send another ZLP (zero-length packet) to tell the
* host the transfer has completed. */
DEBUGE("set_txpktrdy_zlp ");
udp_ep0_send_zlp();
}
}
static void udp_ep0_recv_clean(void)