mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
444 lines
9.9 KiB
C
444 lines
9.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Faraday FTMAC100 Ethernet
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*
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* (C) Copyright 2009 Faraday Technology
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* Po-Yu Chuang <ratbert@faraday-tech.com>
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*/
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#include <config.h>
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#include <common.h>
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#include <malloc.h>
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#include <net.h>
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#include <linux/io.h>
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#include "ftmac100.h"
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#ifdef CONFIG_DM_ETH
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#include <dm.h>
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DECLARE_GLOBAL_DATA_PTR;
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#endif
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#define ETH_ZLEN 60
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struct ftmac100_data {
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struct ftmac100_txdes txdes[1];
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struct ftmac100_rxdes rxdes[PKTBUFSRX];
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int rx_index;
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const char *name;
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phys_addr_t iobase;
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};
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/*
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* Reset MAC
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*/
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static void ftmac100_reset(struct ftmac100_data *priv)
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{
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struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
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debug ("%s()\n", __func__);
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writel (FTMAC100_MACCR_SW_RST, &ftmac100->maccr);
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while (readl (&ftmac100->maccr) & FTMAC100_MACCR_SW_RST)
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mdelay(1);
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/*
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* When soft reset complete, write mac address immediately maybe fail somehow
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* Wait for a while can avoid this problem
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*/
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mdelay(1);
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}
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/*
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* Set MAC address
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*/
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static void ftmac100_set_mac(struct ftmac100_data *priv ,
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const unsigned char *mac)
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{
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struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
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unsigned int maddr = mac[0] << 8 | mac[1];
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unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
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debug ("%s(%x %x)\n", __func__, maddr, laddr);
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writel (maddr, &ftmac100->mac_madr);
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writel (laddr, &ftmac100->mac_ladr);
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}
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/*
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* Disable MAC
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*/
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static void _ftmac100_halt(struct ftmac100_data *priv)
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{
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struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
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debug ("%s()\n", __func__);
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writel (0, &ftmac100->maccr);
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}
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/*
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* Initialize MAC
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*/
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static int _ftmac100_init(struct ftmac100_data *priv, unsigned char enetaddr[6])
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{
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struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
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struct ftmac100_txdes *txdes = priv->txdes;
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struct ftmac100_rxdes *rxdes = priv->rxdes;
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unsigned int maccr;
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int i;
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debug ("%s()\n", __func__);
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ftmac100_reset(priv);
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/* set the ethernet address */
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ftmac100_set_mac(priv, enetaddr);
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/* disable all interrupts */
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writel (0, &ftmac100->imr);
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/* initialize descriptors */
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priv->rx_index = 0;
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txdes[0].txdes1 = FTMAC100_TXDES1_EDOTR;
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rxdes[PKTBUFSRX - 1].rxdes1 = FTMAC100_RXDES1_EDORR;
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for (i = 0; i < PKTBUFSRX; i++) {
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/* RXBUF_BADR */
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rxdes[i].rxdes2 = (unsigned int)net_rx_packets[i];
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rxdes[i].rxdes1 |= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN);
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rxdes[i].rxdes0 = FTMAC100_RXDES0_RXDMA_OWN;
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}
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/* transmit ring */
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writel ((unsigned int)txdes, &ftmac100->txr_badr);
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/* receive ring */
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writel ((unsigned int)rxdes, &ftmac100->rxr_badr);
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/* poll receive descriptor automatically */
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writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100->aptc);
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/* enable transmitter, receiver */
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maccr = FTMAC100_MACCR_XMT_EN |
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FTMAC100_MACCR_RCV_EN |
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FTMAC100_MACCR_XDMA_EN |
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FTMAC100_MACCR_RDMA_EN |
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FTMAC100_MACCR_CRC_APD |
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FTMAC100_MACCR_ENRX_IN_HALFTX |
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FTMAC100_MACCR_RX_RUNT |
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FTMAC100_MACCR_RX_BROADPKT;
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writel (maccr, &ftmac100->maccr);
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return 0;
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}
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/*
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* Free receiving buffer
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*/
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static int _ftmac100_free_pkt(struct ftmac100_data *priv)
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{
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struct ftmac100_rxdes *curr_des;
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curr_des = &priv->rxdes[priv->rx_index];
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/* release buffer to DMA */
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curr_des->rxdes0 |= FTMAC100_RXDES0_RXDMA_OWN;
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priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
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return 0;
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}
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/*
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* Receive a data block via Ethernet
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*/
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static int __ftmac100_recv(struct ftmac100_data *priv)
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{
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struct ftmac100_rxdes *curr_des;
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unsigned short rxlen;
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curr_des = &priv->rxdes[priv->rx_index];
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if (curr_des->rxdes0 & FTMAC100_RXDES0_RXDMA_OWN)
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return 0;
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if (curr_des->rxdes0 & (FTMAC100_RXDES0_RX_ERR |
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FTMAC100_RXDES0_CRC_ERR |
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FTMAC100_RXDES0_FTL |
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FTMAC100_RXDES0_RUNT |
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FTMAC100_RXDES0_RX_ODD_NB)) {
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return 0;
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}
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rxlen = FTMAC100_RXDES0_RFL (curr_des->rxdes0);
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invalidate_dcache_range(curr_des->rxdes2,curr_des->rxdes2+rxlen);
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debug ("%s(): RX buffer %d, %x received\n",
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__func__, priv->rx_index, rxlen);
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return rxlen;
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}
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/*
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* Send a data block via Ethernet
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*/
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static int _ftmac100_send(struct ftmac100_data *priv, void *packet, int length)
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{
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struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
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struct ftmac100_txdes *curr_des = priv->txdes;
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ulong start;
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if (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
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debug ("%s(): no TX descriptor available\n", __func__);
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return -1;
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}
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debug ("%s(%x, %x)\n", __func__, (int)packet, length);
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length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
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/* initiate a transmit sequence */
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flush_dcache_range((u32)packet,(u32)packet+length);
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curr_des->txdes2 = (unsigned int)packet; /* TXBUF_BADR */
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curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR;
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curr_des->txdes1 |= FTMAC100_TXDES1_FTS |
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FTMAC100_TXDES1_LTS |
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FTMAC100_TXDES1_TXBUF_SIZE (length);
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curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;
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/* start transmit */
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writel (1, &ftmac100->txpd);
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/* wait for transfer to succeed */
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start = get_timer(0);
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while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
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if (get_timer(start) >= 5) {
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debug ("%s(): timed out\n", __func__);
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return -1;
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}
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}
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debug ("%s(): packet sent\n", __func__);
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return 0;
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}
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#ifndef CONFIG_DM_ETH
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/*
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* disable transmitter, receiver
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*/
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static void ftmac100_halt(struct eth_device *dev)
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{
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struct ftmac100_data *priv = dev->priv;
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return _ftmac100_halt(priv);
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}
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static int ftmac100_init(struct eth_device *dev, bd_t *bd)
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{
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struct ftmac100_data *priv = dev->priv;
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return _ftmac100_init(priv , dev->enetaddr);
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}
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static int _ftmac100_recv(struct ftmac100_data *priv)
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{
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struct ftmac100_rxdes *curr_des;
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unsigned short len;
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curr_des = &priv->rxdes[priv->rx_index];
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len = __ftmac100_recv(priv);
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if (len) {
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/* pass the packet up to the protocol layers. */
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net_process_received_packet((void *)curr_des->rxdes2, len);
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_ftmac100_free_pkt(priv);
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}
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return len ? 1 : 0;
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}
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/*
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* Get a data block via Ethernet
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*/
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static int ftmac100_recv(struct eth_device *dev)
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{
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struct ftmac100_data *priv = dev->priv;
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return _ftmac100_recv(priv);
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}
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/*
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* Send a data block via Ethernet
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*/
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static int ftmac100_send(struct eth_device *dev, void *packet, int length)
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{
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struct ftmac100_data *priv = dev->priv;
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return _ftmac100_send(priv , packet , length);
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}
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int ftmac100_initialize (bd_t *bd)
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{
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struct eth_device *dev;
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struct ftmac100_data *priv;
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dev = malloc (sizeof *dev);
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if (!dev) {
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printf ("%s(): failed to allocate dev\n", __func__);
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goto out;
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}
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/* Transmit and receive descriptors should align to 16 bytes */
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priv = memalign (16, sizeof (struct ftmac100_data));
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if (!priv) {
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printf ("%s(): failed to allocate priv\n", __func__);
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goto free_dev;
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}
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memset (dev, 0, sizeof (*dev));
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memset (priv, 0, sizeof (*priv));
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strcpy(dev->name, "FTMAC100");
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dev->iobase = CONFIG_FTMAC100_BASE;
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dev->init = ftmac100_init;
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dev->halt = ftmac100_halt;
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dev->send = ftmac100_send;
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dev->recv = ftmac100_recv;
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dev->priv = priv;
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priv->iobase = dev->iobase;
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eth_register (dev);
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return 1;
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free_dev:
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free (dev);
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out:
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return 0;
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}
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#endif
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#ifdef CONFIG_DM_ETH
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static int ftmac100_start(struct udevice *dev)
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{
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struct eth_pdata *plat = dev_get_platdata(dev);
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struct ftmac100_data *priv = dev_get_priv(dev);
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return _ftmac100_init(priv, plat->enetaddr);
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}
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static void ftmac100_stop(struct udevice *dev)
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{
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struct ftmac100_data *priv = dev_get_priv(dev);
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_ftmac100_halt(priv);
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}
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static int ftmac100_send(struct udevice *dev, void *packet, int length)
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{
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struct ftmac100_data *priv = dev_get_priv(dev);
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int ret;
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ret = _ftmac100_send(priv , packet , length);
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return ret ? 0 : -ETIMEDOUT;
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}
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static int ftmac100_recv(struct udevice *dev, int flags, uchar **packetp)
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{
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struct ftmac100_data *priv = dev_get_priv(dev);
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struct ftmac100_rxdes *curr_des;
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curr_des = &priv->rxdes[priv->rx_index];
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int len;
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len = __ftmac100_recv(priv);
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if (len)
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*packetp = (void *)curr_des->rxdes2;
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return len ? len : -EAGAIN;
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}
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static int ftmac100_free_pkt(struct udevice *dev, uchar *packet, int length)
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{
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struct ftmac100_data *priv = dev_get_priv(dev);
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_ftmac100_free_pkt(priv);
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return 0;
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}
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int ftmac100_read_rom_hwaddr(struct udevice *dev)
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{
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struct eth_pdata *pdata = dev_get_platdata(dev);
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eth_env_get_enetaddr("ethaddr", pdata->enetaddr);
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return 0;
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}
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static const char *dtbmacaddr(u32 ifno)
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{
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int node, len;
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char enet[16];
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const char *mac;
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const char *path;
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if (gd->fdt_blob == NULL) {
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printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
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return NULL;
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}
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node = fdt_path_offset(gd->fdt_blob, "/aliases");
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if (node < 0)
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return NULL;
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sprintf(enet, "ethernet%d", ifno);
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path = fdt_getprop(gd->fdt_blob, node, enet, NULL);
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if (!path) {
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printf("no alias for %s\n", enet);
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return NULL;
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}
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node = fdt_path_offset(gd->fdt_blob, path);
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mac = fdt_getprop(gd->fdt_blob, node, "mac-address", &len);
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if (mac && is_valid_ethaddr((u8 *)mac))
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return mac;
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return NULL;
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}
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static int ftmac100_ofdata_to_platdata(struct udevice *dev)
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{
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struct ftmac100_data *priv = dev_get_priv(dev);
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struct eth_pdata *pdata = dev_get_platdata(dev);
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const char *mac;
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pdata->iobase = devfdt_get_addr(dev);
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priv->iobase = pdata->iobase;
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mac = dtbmacaddr(0);
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if (mac)
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memcpy(pdata->enetaddr , mac , 6);
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return 0;
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}
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static int ftmac100_probe(struct udevice *dev)
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{
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struct ftmac100_data *priv = dev_get_priv(dev);
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priv->name = dev->name;
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return 0;
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}
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static int ftmac100_bind(struct udevice *dev)
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{
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return device_set_name(dev, dev->name);
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}
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static const struct eth_ops ftmac100_ops = {
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.start = ftmac100_start,
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.send = ftmac100_send,
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.recv = ftmac100_recv,
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.stop = ftmac100_stop,
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.free_pkt = ftmac100_free_pkt,
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};
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static const struct udevice_id ftmac100_ids[] = {
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{ .compatible = "andestech,atmac100" },
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{ }
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};
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U_BOOT_DRIVER(ftmac100) = {
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.name = "nds32_mac",
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.id = UCLASS_ETH,
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.of_match = ftmac100_ids,
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.bind = ftmac100_bind,
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.ofdata_to_platdata = ftmac100_ofdata_to_platdata,
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.probe = ftmac100_probe,
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.ops = &ftmac100_ops,
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.priv_auto_alloc_size = sizeof(struct ftmac100_data),
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.platdata_auto_alloc_size = sizeof(struct eth_pdata),
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.flags = DM_FLAG_ALLOC_PRIV_DMA,
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};
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#endif
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