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https://github.com/brain-hackers/u-boot-brain
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net/ethoc: add CONFIG_DM_ETH support
Extract reusable parts from ethoc_init, ethoc_set_mac_address, ethoc_send and ethoc_receive, move the rest under #ifdef CONFIG_DM_ETH. Add U_BOOT_DRIVER, eth_ops structure and implement required methods. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Max Filippov
Joe Hershberger
parent
a84a757ae7
commit
5d43feabf3
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@ -5,13 +5,14 @@
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* Copyright (C) 2008-2009 Avionic Design GmbH
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* Thierry Reding <thierry.reding@avionic-design.de>
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* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
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* Copyright (C) 2016 Cadence Design Systems Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <dm/device.h>
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#include <dm/platform_data/net_ethoc.h>
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#include <linux/io.h>
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#include <malloc.h>
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#include <net.h>
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@ -216,11 +217,8 @@ static inline void ethoc_write_bd(struct ethoc *priv, int index,
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ethoc_write(priv, offset + 4, bd->addr);
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}
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static int ethoc_set_mac_address(struct eth_device *dev)
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static int ethoc_write_hwaddr_common(struct ethoc *priv, u8 *mac)
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{
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struct ethoc *priv = (struct ethoc *)dev->priv;
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u8 *mac = dev->enetaddr;
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ethoc_write(priv, MAC_ADDR0, (mac[2] << 24) | (mac[3] << 16) |
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(mac[4] << 8) | (mac[5] << 0));
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ethoc_write(priv, MAC_ADDR1, (mac[0] << 8) | (mac[1] << 0));
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@ -305,11 +303,8 @@ static int ethoc_reset(struct ethoc *priv)
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return 0;
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}
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static int ethoc_init(struct eth_device *dev, bd_t * bd)
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static int ethoc_init_common(struct ethoc *priv)
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{
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struct ethoc *priv = (struct ethoc *)dev->priv;
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printf("ethoc\n");
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priv->num_tx = 1;
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priv->num_rx = PKTBUFSRX;
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ethoc_write(priv, TX_BD_NUM, priv->num_tx);
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@ -354,36 +349,43 @@ static int ethoc_update_rx_stats(struct ethoc_bd *bd)
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return ret;
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}
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static int ethoc_rx(struct ethoc *priv, int limit)
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static int ethoc_rx_common(struct ethoc *priv, uchar **packetp)
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{
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int count;
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u32 entry;
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struct ethoc_bd bd;
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for (count = 0; count < limit; ++count) {
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u32 entry;
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struct ethoc_bd bd;
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entry = priv->num_tx + (priv->cur_rx % priv->num_rx);
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ethoc_read_bd(priv, entry, &bd);
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if (bd.stat & RX_BD_EMPTY)
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return -EAGAIN;
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entry = priv->num_tx + (priv->cur_rx % priv->num_rx);
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ethoc_read_bd(priv, entry, &bd);
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if (bd.stat & RX_BD_EMPTY)
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break;
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debug("%s(): RX buffer %d, %x received\n",
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__func__, priv->cur_rx, bd.stat);
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if (ethoc_update_rx_stats(&bd) == 0) {
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int size = bd.stat >> 16;
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debug("%s(): RX buffer %d, %x received\n",
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__func__, priv->cur_rx, bd.stat);
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if (ethoc_update_rx_stats(&bd) == 0) {
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int size = bd.stat >> 16;
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size -= 4; /* strip the CRC */
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net_process_received_packet((void *)bd.addr, size);
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}
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size -= 4; /* strip the CRC */
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*packetp = (void *)bd.addr;
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return size;
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} else {
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return 0;
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}
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}
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/* clear the buffer descriptor so it can be reused */
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flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN);
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bd.stat &= ~RX_BD_STATS;
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bd.stat |= RX_BD_EMPTY;
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ethoc_write_bd(priv, entry, &bd);
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priv->cur_rx++;
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static int ethoc_is_new_packet_received(struct ethoc *priv)
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{
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u32 pending;
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pending = ethoc_read(priv, INT_SOURCE);
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ethoc_ack_irq(priv, pending);
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if (pending & INT_MASK_BUSY)
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debug("%s(): packet dropped\n", __func__);
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if (pending & INT_MASK_RX) {
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debug("%s(): rx irq\n", __func__);
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return 1;
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}
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return count;
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return 0;
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}
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static int ethoc_update_tx_stats(struct ethoc_bd *bd)
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@ -413,9 +415,8 @@ static void ethoc_tx(struct ethoc *priv)
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(void)ethoc_update_tx_stats(&bd);
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}
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static int ethoc_send(struct eth_device *dev, void *packet, int length)
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static int ethoc_send_common(struct ethoc *priv, void *packet, int length)
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{
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struct ethoc *priv = (struct ethoc *)dev->priv;
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struct ethoc_bd bd;
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u32 entry;
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u32 pending;
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@ -460,6 +461,126 @@ static int ethoc_send(struct eth_device *dev, void *packet, int length)
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return 0;
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}
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static int ethoc_free_pkt_common(struct ethoc *priv)
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{
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u32 entry;
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struct ethoc_bd bd;
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entry = priv->num_tx + (priv->cur_rx % priv->num_rx);
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ethoc_read_bd(priv, entry, &bd);
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/* clear the buffer descriptor so it can be reused */
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flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN);
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bd.stat &= ~RX_BD_STATS;
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bd.stat |= RX_BD_EMPTY;
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ethoc_write_bd(priv, entry, &bd);
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priv->cur_rx++;
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return 0;
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}
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#ifdef CONFIG_DM_ETH
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static int ethoc_write_hwaddr(struct udevice *dev)
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{
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struct ethoc_eth_pdata *pdata = dev_get_platdata(dev);
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struct ethoc *priv = dev_get_priv(dev);
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u8 *mac = pdata->eth_pdata.enetaddr;
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return ethoc_write_hwaddr_common(priv, mac);
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}
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static int ethoc_send(struct udevice *dev, void *packet, int length)
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{
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return ethoc_send_common(dev_get_priv(dev), packet, length);
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}
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static int ethoc_free_pkt(struct udevice *dev, uchar *packet, int length)
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{
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return ethoc_free_pkt_common(dev_get_priv(dev));
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}
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static int ethoc_recv(struct udevice *dev, int flags, uchar **packetp)
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{
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struct ethoc *priv = dev_get_priv(dev);
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if (flags & ETH_RECV_CHECK_DEVICE)
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if (!ethoc_is_new_packet_received(priv))
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return -EAGAIN;
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return ethoc_rx_common(priv, packetp);
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}
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static int ethoc_start(struct udevice *dev)
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{
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return ethoc_init_common(dev_get_priv(dev));
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}
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static void ethoc_stop(struct udevice *dev)
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{
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struct ethoc *priv = dev_get_priv(dev);
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ethoc_disable_rx_and_tx(priv);
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}
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static int ethoc_probe(struct udevice *dev)
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{
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struct ethoc_eth_pdata *pdata = dev_get_platdata(dev);
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struct ethoc *priv = dev_get_priv(dev);
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priv->iobase = ioremap(pdata->eth_pdata.iobase, ETHOC_IOSIZE);
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return 0;
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}
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static int ethoc_remove(struct udevice *dev)
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{
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struct ethoc *priv = dev_get_priv(dev);
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iounmap(priv->iobase);
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return 0;
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}
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static const struct eth_ops ethoc_ops = {
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.start = ethoc_start,
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.stop = ethoc_stop,
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.send = ethoc_send,
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.recv = ethoc_recv,
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.free_pkt = ethoc_free_pkt,
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.write_hwaddr = ethoc_write_hwaddr,
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};
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U_BOOT_DRIVER(ethoc) = {
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.name = "ethoc",
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.id = UCLASS_ETH,
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.probe = ethoc_probe,
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.remove = ethoc_remove,
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.ops = ðoc_ops,
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.priv_auto_alloc_size = sizeof(struct ethoc),
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.platdata_auto_alloc_size = sizeof(struct ethoc_eth_pdata),
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};
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#else
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static int ethoc_init(struct eth_device *dev, bd_t *bd)
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{
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struct ethoc *priv = (struct ethoc *)dev->priv;
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return ethoc_init_common(priv);
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}
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static int ethoc_write_hwaddr(struct eth_device *dev)
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{
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struct ethoc *priv = (struct ethoc *)dev->priv;
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u8 *mac = dev->enetaddr;
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return ethoc_write_hwaddr_common(priv, mac);
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}
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static int ethoc_send(struct eth_device *dev, void *packet, int length)
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{
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return ethoc_send_common(dev->priv, packet, length);
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}
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static void ethoc_halt(struct eth_device *dev)
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{
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ethoc_disable_rx_and_tx(dev->priv);
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@ -468,17 +589,21 @@ static void ethoc_halt(struct eth_device *dev)
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static int ethoc_recv(struct eth_device *dev)
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{
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struct ethoc *priv = (struct ethoc *)dev->priv;
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u32 pending;
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int count;
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pending = ethoc_read(priv, INT_SOURCE);
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ethoc_ack_irq(priv, pending);
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if (pending & INT_MASK_BUSY)
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debug("%s(): packet dropped\n", __func__);
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if (pending & INT_MASK_RX) {
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debug("%s(): rx irq\n", __func__);
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ethoc_rx(priv, PKTBUFSRX);
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if (!ethoc_is_new_packet_received(priv))
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return 0;
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for (count = 0; count < PKTBUFSRX; ++count) {
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uchar *packetp;
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int size = ethoc_rx_common(priv, &packetp);
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if (size < 0)
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break;
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if (size > 0)
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net_process_received_packet(packetp, size);
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ethoc_free_pkt_common(priv);
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}
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return 0;
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}
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@ -503,10 +628,12 @@ int ethoc_initialize(u8 dev_num, int base_addr)
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dev->halt = ethoc_halt;
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dev->send = ethoc_send;
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dev->recv = ethoc_recv;
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dev->write_hwaddr = ethoc_set_mac_address;
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dev->write_hwaddr = ethoc_write_hwaddr;
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sprintf(dev->name, "%s-%hu", "ETHOC", dev_num);
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priv->iobase = ioremap(dev->iobase, ETHOC_IOSIZE);
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eth_register(dev);
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return 1;
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}
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#endif
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20
include/dm/platform_data/net_ethoc.h
Normal file
20
include/dm/platform_data/net_ethoc.h
Normal file
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@ -0,0 +1,20 @@
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/*
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* Copyright (C) 2016 Cadence Design Systems Inc.
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#ifndef _ETHOC_H
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#define _ETHOC_H
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#include <net.h>
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#ifdef CONFIG_DM_ETH
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struct ethoc_eth_pdata {
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struct eth_pdata eth_pdata;
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};
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#endif
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#endif /* _ETHOC_H */
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