143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/*
|
|
* Xilinx xps_ll_temac ethernet driver for u-boot
|
|
*
|
|
* FIFO sub-controller
|
|
*
|
|
* Copyright (C) 2011 - 2012 Stephan Linz <linz@li-pro.net>
|
|
* Copyright (C) 2008 - 2011 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2008 - 2011 PetaLogix
|
|
*
|
|
* Based on Yoshio Kashiwagi kashiwagi@co-nss.co.jp driver
|
|
* Copyright (C) 2008 Nissin Systems Co.,Ltd.
|
|
* March 2008 created
|
|
*
|
|
* CREDITS: tsec driver
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* [0]: http://www.xilinx.com/support/documentation
|
|
*
|
|
* [F]: [0]/ip_documentation/xps_ll_fifo.pdf
|
|
* [S]: [0]/ip_documentation/xps_ll_temac.pdf
|
|
* [A]: [0]/application_notes/xapp1041.pdf
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <common.h>
|
|
#include <net.h>
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "xilinx_ll_temac.h"
|
|
#include "xilinx_ll_temac_fifo.h"
|
|
|
|
int ll_temac_reset_fifo(struct eth_device *dev)
|
|
{
|
|
struct ll_temac *ll_temac = dev->priv;
|
|
struct fifo_ctrl *fifo_ctrl = (void *)ll_temac->ctrladdr;
|
|
|
|
out_be32(&fifo_ctrl->tdfr, LL_FIFO_TDFR_KEY);
|
|
out_be32(&fifo_ctrl->rdfr, LL_FIFO_RDFR_KEY);
|
|
out_be32(&fifo_ctrl->isr, ~0UL);
|
|
out_be32(&fifo_ctrl->ier, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ll_temac_recv_fifo(struct eth_device *dev)
|
|
{
|
|
int i, length = 0;
|
|
u32 *buf = (u32 *)NetRxPackets[0];
|
|
struct ll_temac *ll_temac = dev->priv;
|
|
struct fifo_ctrl *fifo_ctrl = (void *)ll_temac->ctrladdr;
|
|
|
|
if (in_be32(&fifo_ctrl->isr) & LL_FIFO_ISR_RC) {
|
|
|
|
/* reset isr */
|
|
out_be32(&fifo_ctrl->isr, ~0UL);
|
|
|
|
/*
|
|
* MAYBE here:
|
|
* while (fifo_ctrl->isr);
|
|
*/
|
|
|
|
/*
|
|
* The length is written (into RLR) by the XPS LL FIFO
|
|
* when the packet is received across the RX LocalLink
|
|
* interface and the receive data FIFO had enough
|
|
* locations that all of the packet data has been saved.
|
|
* The RLR should only be read when a receive packet is
|
|
* available for processing (the receive occupancy is
|
|
* not zero). Once the RLR is read, the receive packet
|
|
* data should be read from the receive data FIFO before
|
|
* the RLR is read again.
|
|
*
|
|
* [F] page 17, Receive Length Register (RLR)
|
|
*/
|
|
if (in_be32(&fifo_ctrl->rdfo) & LL_FIFO_RDFO_MASK) {
|
|
length = in_be32(&fifo_ctrl->rlf) & LL_FIFO_RLF_MASK;
|
|
} else {
|
|
printf("%s: Got error, no receive occupancy\n",
|
|
__func__);
|
|
return -1;
|
|
}
|
|
|
|
if (length > PKTSIZE_ALIGN) {
|
|
printf("%s: Got error, receive package too big (%i)\n",
|
|
__func__, length);
|
|
ll_temac_reset_fifo(dev);
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < length; i += 4)
|
|
*buf++ = in_be32(&fifo_ctrl->rdfd);
|
|
|
|
NetReceive(NetRxPackets[0], length);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ll_temac_send_fifo(struct eth_device *dev, void *packet, int length)
|
|
{
|
|
int i;
|
|
u32 *buf = (u32 *)packet;
|
|
struct ll_temac *ll_temac = dev->priv;
|
|
struct fifo_ctrl *fifo_ctrl = (void *)ll_temac->ctrladdr;
|
|
|
|
if (length < LL_FIFO_TLF_MIN) {
|
|
printf("%s: Got error, transmit package too small (%i)\n",
|
|
__func__, length);
|
|
return -1;
|
|
}
|
|
|
|
if (length > LL_FIFO_TLF_MAX) {
|
|
printf("%s: Got error, transmit package too big (%i)\n",
|
|
__func__, length);
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < length; i += 4)
|
|
out_be32(&fifo_ctrl->tdfd, *buf++);
|
|
|
|
/*
|
|
* Once the packet length is written to the TLR it is
|
|
* automatically moved to the transmit data FIFO with
|
|
* the packet data freeing up the TLR for another value.
|
|
* The packet length must be written to the TLR after
|
|
* the packet data is written to the transmit data FIFO.
|
|
* It is not valid to write data for multiple packets
|
|
* to the transmit data FIFO before writing the packet
|
|
* length values.
|
|
*
|
|
* [F] page 17, Transmit Length Register (TLR)
|
|
*/
|
|
out_be32(&fifo_ctrl->tlf, length);
|
|
|
|
return 0;
|
|
}
|