1 // SPDX-License-Identifier: GPL-2.0+
3 * Faraday FTMAC100 Ethernet
5 * (C) Copyright 2009 Faraday Technology
6 * Po-Yu Chuang <ratbert@faraday-tech.com>
15 #include <asm/global_data.h>
16 #include <linux/delay.h>
22 DECLARE_GLOBAL_DATA_PTR;
26 struct ftmac100_data {
27 struct ftmac100_txdes txdes[1];
28 struct ftmac100_rxdes rxdes[PKTBUFSRX];
37 static void ftmac100_reset(struct ftmac100_data *priv)
39 struct ftmac100 *ftmac100 = (struct ftmac100 *)(uintptr_t)priv->iobase;
41 debug ("%s()\n", __func__);
43 writel (FTMAC100_MACCR_SW_RST, &ftmac100->maccr);
45 while (readl (&ftmac100->maccr) & FTMAC100_MACCR_SW_RST)
48 * When soft reset complete, write mac address immediately maybe fail somehow
49 * Wait for a while can avoid this problem
57 static void ftmac100_set_mac(struct ftmac100_data *priv ,
58 const unsigned char *mac)
60 struct ftmac100 *ftmac100 = (struct ftmac100 *)(uintptr_t)priv->iobase;
61 unsigned int maddr = mac[0] << 8 | mac[1];
62 unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
64 debug ("%s(%x %x)\n", __func__, maddr, laddr);
66 writel (maddr, &ftmac100->mac_madr);
67 writel (laddr, &ftmac100->mac_ladr);
73 static void _ftmac100_halt(struct ftmac100_data *priv)
75 struct ftmac100 *ftmac100 = (struct ftmac100 *)(uintptr_t)priv->iobase;
76 debug ("%s()\n", __func__);
77 writel (0, &ftmac100->maccr);
83 static int _ftmac100_init(struct ftmac100_data *priv, unsigned char enetaddr[6])
85 struct ftmac100 *ftmac100 = (struct ftmac100 *)(uintptr_t)priv->iobase;
86 struct ftmac100_txdes *txdes = priv->txdes;
87 struct ftmac100_rxdes *rxdes = priv->rxdes;
90 debug ("%s()\n", __func__);
94 /* set the ethernet address */
95 ftmac100_set_mac(priv, enetaddr);
98 /* disable all interrupts */
100 writel (0, &ftmac100->imr);
102 /* initialize descriptors */
106 txdes[0].txdes1 = FTMAC100_TXDES1_EDOTR;
107 rxdes[PKTBUFSRX - 1].rxdes1 = FTMAC100_RXDES1_EDORR;
109 for (i = 0; i < PKTBUFSRX; i++) {
111 rxdes[i].rxdes2 = (unsigned int)(unsigned long)net_rx_packets[i];
112 rxdes[i].rxdes1 |= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN);
113 rxdes[i].rxdes0 = FTMAC100_RXDES0_RXDMA_OWN;
118 writel ((unsigned long)txdes, &ftmac100->txr_badr);
122 writel ((unsigned long)rxdes, &ftmac100->rxr_badr);
124 /* poll receive descriptor automatically */
126 writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100->aptc);
128 /* enable transmitter, receiver */
130 maccr = FTMAC100_MACCR_XMT_EN |
131 FTMAC100_MACCR_RCV_EN |
132 FTMAC100_MACCR_XDMA_EN |
133 FTMAC100_MACCR_RDMA_EN |
134 FTMAC100_MACCR_CRC_APD |
135 FTMAC100_MACCR_ENRX_IN_HALFTX |
136 FTMAC100_MACCR_RX_RUNT |
137 FTMAC100_MACCR_RX_BROADPKT;
139 writel (maccr, &ftmac100->maccr);
145 * Free receiving buffer
147 static int _ftmac100_free_pkt(struct ftmac100_data *priv)
149 struct ftmac100_rxdes *curr_des;
150 curr_des = &priv->rxdes[priv->rx_index];
151 /* release buffer to DMA */
152 curr_des->rxdes0 |= FTMAC100_RXDES0_RXDMA_OWN;
153 priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
158 * Receive a data block via Ethernet
160 static int __ftmac100_recv(struct ftmac100_data *priv)
162 struct ftmac100_rxdes *curr_des;
163 unsigned short rxlen;
165 curr_des = &priv->rxdes[priv->rx_index];
166 if (curr_des->rxdes0 & FTMAC100_RXDES0_RXDMA_OWN)
169 if (curr_des->rxdes0 & (FTMAC100_RXDES0_RX_ERR |
170 FTMAC100_RXDES0_CRC_ERR |
171 FTMAC100_RXDES0_FTL |
172 FTMAC100_RXDES0_RUNT |
173 FTMAC100_RXDES0_RX_ODD_NB)) {
177 rxlen = FTMAC100_RXDES0_RFL (curr_des->rxdes0);
178 invalidate_dcache_range(curr_des->rxdes2,curr_des->rxdes2+rxlen);
179 debug ("%s(): RX buffer %d, %x received\n",
180 __func__, priv->rx_index, rxlen);
186 * Send a data block via Ethernet
188 static int _ftmac100_send(struct ftmac100_data *priv, void *packet, int length)
190 struct ftmac100 *ftmac100 = (struct ftmac100 *)(uintptr_t)priv->iobase;
191 struct ftmac100_txdes *curr_des = priv->txdes;
194 if (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
195 debug ("%s(): no TX descriptor available\n", __func__);
199 debug ("%s(%lx, %x)\n", __func__, (unsigned long)packet, length);
201 length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
203 /* initiate a transmit sequence */
205 flush_dcache_range((unsigned long)packet,(unsigned long)packet+length);
206 curr_des->txdes2 = (unsigned int)(unsigned long)packet; /* TXBUF_BADR */
208 curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR;
209 curr_des->txdes1 |= FTMAC100_TXDES1_FTS |
210 FTMAC100_TXDES1_LTS |
211 FTMAC100_TXDES1_TXBUF_SIZE (length);
213 curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;
217 writel (1, &ftmac100->txpd);
219 /* wait for transfer to succeed */
221 start = get_timer(0);
222 while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
223 if (get_timer(start) >= 5) {
224 debug ("%s(): timed out\n", __func__);
229 debug ("%s(): packet sent\n", __func__);
234 #ifndef CONFIG_DM_ETH
236 * disable transmitter, receiver
238 static void ftmac100_halt(struct eth_device *dev)
240 struct ftmac100_data *priv = dev->priv;
241 return _ftmac100_halt(priv);
244 static int ftmac100_init(struct eth_device *dev, struct bd_info *bd)
246 struct ftmac100_data *priv = dev->priv;
247 return _ftmac100_init(priv , dev->enetaddr);
250 static int _ftmac100_recv(struct ftmac100_data *priv)
252 struct ftmac100_rxdes *curr_des;
254 curr_des = &priv->rxdes[priv->rx_index];
255 len = __ftmac100_recv(priv);
257 /* pass the packet up to the protocol layers. */
258 net_process_received_packet((void *)curr_des->rxdes2, len);
259 _ftmac100_free_pkt(priv);
265 * Get a data block via Ethernet
267 static int ftmac100_recv(struct eth_device *dev)
269 struct ftmac100_data *priv = dev->priv;
270 return _ftmac100_recv(priv);
274 * Send a data block via Ethernet
276 static int ftmac100_send(struct eth_device *dev, void *packet, int length)
278 struct ftmac100_data *priv = dev->priv;
279 return _ftmac100_send(priv , packet , length);
282 int ftmac100_initialize (struct bd_info *bd)
284 struct eth_device *dev;
285 struct ftmac100_data *priv;
286 dev = malloc (sizeof *dev);
288 printf ("%s(): failed to allocate dev\n", __func__);
291 /* Transmit and receive descriptors should align to 16 bytes */
292 priv = memalign (16, sizeof (struct ftmac100_data));
294 printf ("%s(): failed to allocate priv\n", __func__);
297 memset (dev, 0, sizeof (*dev));
298 memset (priv, 0, sizeof (*priv));
300 strcpy(dev->name, "FTMAC100");
301 dev->iobase = CONFIG_FTMAC100_BASE;
302 dev->init = ftmac100_init;
303 dev->halt = ftmac100_halt;
304 dev->send = ftmac100_send;
305 dev->recv = ftmac100_recv;
307 priv->iobase = dev->iobase;
320 static int ftmac100_start(struct udevice *dev)
322 struct eth_pdata *plat = dev_get_plat(dev);
323 struct ftmac100_data *priv = dev_get_priv(dev);
325 return _ftmac100_init(priv, plat->enetaddr);
328 static void ftmac100_stop(struct udevice *dev)
330 struct ftmac100_data *priv = dev_get_priv(dev);
331 _ftmac100_halt(priv);
334 static int ftmac100_send(struct udevice *dev, void *packet, int length)
336 struct ftmac100_data *priv = dev_get_priv(dev);
338 ret = _ftmac100_send(priv , packet , length);
339 return ret ? 0 : -ETIMEDOUT;
342 static int ftmac100_recv(struct udevice *dev, int flags, uchar **packetp)
344 struct ftmac100_data *priv = dev_get_priv(dev);
345 struct ftmac100_rxdes *curr_des;
346 curr_des = &priv->rxdes[priv->rx_index];
348 len = __ftmac100_recv(priv);
350 *packetp = (uchar *)(unsigned long)curr_des->rxdes2;
352 return len ? len : -EAGAIN;
355 static int ftmac100_free_pkt(struct udevice *dev, uchar *packet, int length)
357 struct ftmac100_data *priv = dev_get_priv(dev);
358 _ftmac100_free_pkt(priv);
362 int ftmac100_read_rom_hwaddr(struct udevice *dev)
364 struct eth_pdata *pdata = dev_get_plat(dev);
365 eth_env_get_enetaddr("ethaddr", pdata->enetaddr);
369 static const char *dtbmacaddr(u32 ifno)
375 if (gd->fdt_blob == NULL) {
376 printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
379 node = fdt_path_offset(gd->fdt_blob, "/aliases");
383 sprintf(enet, "ethernet%d", ifno);
384 path = fdt_getprop(gd->fdt_blob, node, enet, NULL);
386 printf("no alias for %s\n", enet);
389 node = fdt_path_offset(gd->fdt_blob, path);
390 mac = fdt_getprop(gd->fdt_blob, node, "mac-address", &len);
391 if (mac && is_valid_ethaddr((u8 *)mac))
397 static int ftmac100_of_to_plat(struct udevice *dev)
399 struct ftmac100_data *priv = dev_get_priv(dev);
400 struct eth_pdata *pdata = dev_get_plat(dev);
402 pdata->iobase = dev_read_addr(dev);
403 priv->iobase = pdata->iobase;
406 memcpy(pdata->enetaddr , mac , 6);
411 static int ftmac100_probe(struct udevice *dev)
413 struct ftmac100_data *priv = dev_get_priv(dev);
414 priv->name = dev->name;
418 static int ftmac100_bind(struct udevice *dev)
420 return device_set_name(dev, dev->name);
423 static const struct eth_ops ftmac100_ops = {
424 .start = ftmac100_start,
425 .send = ftmac100_send,
426 .recv = ftmac100_recv,
427 .stop = ftmac100_stop,
428 .free_pkt = ftmac100_free_pkt,
431 static const struct udevice_id ftmac100_ids[] = {
432 { .compatible = "andestech,atmac100" },
436 U_BOOT_DRIVER(ftmac100) = {
439 .of_match = ftmac100_ids,
440 .bind = ftmac100_bind,
441 .of_to_plat = ftmac100_of_to_plat,
442 .probe = ftmac100_probe,
443 .ops = &ftmac100_ops,
444 .priv_auto = sizeof(struct ftmac100_data),
445 .plat_auto = sizeof(struct eth_pdata),
446 .flags = DM_FLAG_ALLOC_PRIV_DMA,