2 * Faraday FTGMAC100 Ethernet
4 * (C) Copyright 2009 Faraday Technology
5 * Po-Yu Chuang <ratbert@faraday-tech.com>
7 * (C) Copyright 2010 Andes Technology
8 * Macpaul Lin <macpaul@andestech.com>
10 * SPDX-License-Identifier: GPL-2.0+
18 #include <asm/dma-mapping.h>
19 #include <linux/mii.h>
21 #include "ftgmac100.h"
24 #define CFG_XBUF_SIZE 1536
26 /* RBSR - hw default init value is also 0x640 */
27 #define RBSR_DEFAULT_VALUE 0x640
29 /* PKTBUFSTX/PKTBUFSRX must both be power of 2 */
30 #define PKTBUFSTX 4 /* must be power of 2 */
32 struct ftgmac100_data {
34 struct ftgmac100_txdes *txdes;
36 struct ftgmac100_rxdes *rxdes;
43 * struct mii_bus functions
45 static int ftgmac100_mdiobus_read(struct eth_device *dev, int phy_addr,
48 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
52 phycr = readl(&ftgmac100->phycr);
54 /* preserve MDC cycle threshold */
55 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
57 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
58 | FTGMAC100_PHYCR_REGAD(regnum)
59 | FTGMAC100_PHYCR_MIIRD;
61 writel(phycr, &ftgmac100->phycr);
63 for (i = 0; i < 10; i++) {
64 phycr = readl(&ftgmac100->phycr);
66 if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
69 data = readl(&ftgmac100->phydata);
70 return FTGMAC100_PHYDATA_MIIRDATA(data);
76 debug("mdio read timed out\n");
80 static int ftgmac100_mdiobus_write(struct eth_device *dev, int phy_addr,
81 int regnum, u16 value)
83 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
88 phycr = readl(&ftgmac100->phycr);
90 /* preserve MDC cycle threshold */
91 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
93 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
94 | FTGMAC100_PHYCR_REGAD(regnum)
95 | FTGMAC100_PHYCR_MIIWR;
97 data = FTGMAC100_PHYDATA_MIIWDATA(value);
99 writel(data, &ftgmac100->phydata);
100 writel(phycr, &ftgmac100->phycr);
102 for (i = 0; i < 10; i++) {
103 phycr = readl(&ftgmac100->phycr);
105 if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0) {
106 debug("(phycr & FTGMAC100_PHYCR_MIIWR) == 0: " \
107 "phy_addr: %x\n", phy_addr);
114 debug("mdio write timed out\n");
118 int ftgmac100_phy_read(struct eth_device *dev, int addr, int reg, u16 *value)
120 *value = ftgmac100_mdiobus_read(dev , addr, reg);
128 int ftgmac100_phy_write(struct eth_device *dev, int addr, int reg, u16 value)
130 if (ftgmac100_mdiobus_write(dev, addr, reg, value) == -1)
136 static int ftgmac100_phy_reset(struct eth_device *dev)
138 struct ftgmac100_data *priv = dev->priv;
142 adv = ADVERTISE_CSMA | ADVERTISE_ALL;
144 ftgmac100_phy_write(dev, priv->phy_addr, MII_ADVERTISE, adv);
146 printf("%s: Starting autonegotiation...\n", dev->name);
148 ftgmac100_phy_write(dev, priv->phy_addr,
149 MII_BMCR, (BMCR_ANENABLE | BMCR_ANRESTART));
151 for (i = 0; i < 100000 / 100; i++) {
152 ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
154 if (status & BMSR_ANEGCOMPLETE)
159 if (status & BMSR_ANEGCOMPLETE) {
160 printf("%s: Autonegotiation complete\n", dev->name);
162 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
170 static int ftgmac100_phy_init(struct eth_device *dev)
172 struct ftgmac100_data *priv = dev->priv;
175 u16 phy_id, status, adv, lpa, stat_ge;
176 int media, speed, duplex;
179 /* Check if the PHY is up to snuff... */
180 for (phy_addr = 0; phy_addr < CONFIG_PHY_MAX_ADDR; phy_addr++) {
182 ftgmac100_phy_read(dev, phy_addr, MII_PHYSID1, &phy_id);
185 * When it is unable to found PHY,
186 * the interface usually return 0xffff or 0x0000
188 if (phy_id != 0xffff && phy_id != 0x0) {
189 printf("%s: found PHY at 0x%02x\n",
190 dev->name, phy_addr);
191 priv->phy_addr = phy_addr;
196 if (phy_id == 0xffff || phy_id == 0x0) {
197 printf("%s: no PHY present\n", dev->name);
201 ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
203 if (!(status & BMSR_LSTATUS)) {
204 /* Try to re-negotiate if we don't have link already. */
205 ftgmac100_phy_reset(dev);
207 for (i = 0; i < 100000 / 100; i++) {
208 ftgmac100_phy_read(dev, priv->phy_addr,
210 if (status & BMSR_LSTATUS)
216 if (!(status & BMSR_LSTATUS)) {
217 printf("%s: link down\n", dev->name);
221 #ifdef CONFIG_FTGMAC100_EGIGA
222 /* 1000 Base-T Status Register */
223 ftgmac100_phy_read(dev, priv->phy_addr,
224 MII_STAT1000, &stat_ge);
226 speed = (stat_ge & (LPA_1000FULL | LPA_1000HALF)
229 duplex = ((stat_ge & LPA_1000FULL)
232 if (speed) { /* Speed is 1000 */
233 printf("%s: link up, 1000bps %s-duplex\n",
234 dev->name, duplex ? "full" : "half");
239 ftgmac100_phy_read(dev, priv->phy_addr, MII_ADVERTISE, &adv);
240 ftgmac100_phy_read(dev, priv->phy_addr, MII_LPA, &lpa);
242 media = mii_nway_result(lpa & adv);
243 speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 1 : 0);
244 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
246 printf("%s: link up, %sMbps %s-duplex\n",
247 dev->name, speed ? "100" : "10", duplex ? "full" : "half");
252 static int ftgmac100_update_link_speed(struct eth_device *dev)
254 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
255 struct ftgmac100_data *priv = dev->priv;
257 unsigned short stat_fe;
258 unsigned short stat_ge;
261 #ifdef CONFIG_FTGMAC100_EGIGA
262 /* 1000 Base-T Status Register */
263 ftgmac100_phy_read(dev, priv->phy_addr, MII_STAT1000, &stat_ge);
266 ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &stat_fe);
268 if (!(stat_fe & BMSR_LSTATUS)) /* link status up? */
271 /* read MAC control register and clear related bits */
272 maccr = readl(&ftgmac100->maccr) &
273 ~(FTGMAC100_MACCR_GIGA_MODE |
274 FTGMAC100_MACCR_FAST_MODE |
275 FTGMAC100_MACCR_FULLDUP);
277 #ifdef CONFIG_FTGMAC100_EGIGA
278 if (stat_ge & LPA_1000FULL) {
279 /* set gmac for 1000BaseTX and Full Duplex */
280 maccr |= FTGMAC100_MACCR_GIGA_MODE | FTGMAC100_MACCR_FULLDUP;
283 if (stat_ge & LPA_1000HALF) {
284 /* set gmac for 1000BaseTX and Half Duplex */
285 maccr |= FTGMAC100_MACCR_GIGA_MODE;
289 if (stat_fe & BMSR_100FULL) {
290 /* set MII for 100BaseTX and Full Duplex */
291 maccr |= FTGMAC100_MACCR_FAST_MODE | FTGMAC100_MACCR_FULLDUP;
294 if (stat_fe & BMSR_10FULL) {
295 /* set MII for 10BaseT and Full Duplex */
296 maccr |= FTGMAC100_MACCR_FULLDUP;
299 if (stat_fe & BMSR_100HALF) {
300 /* set MII for 100BaseTX and Half Duplex */
301 maccr |= FTGMAC100_MACCR_FAST_MODE;
304 if (stat_fe & BMSR_10HALF) {
305 /* set MII for 10BaseT and Half Duplex */
306 /* we have already clear these bits, do nothing */
310 /* update MII config into maccr */
311 writel(maccr, &ftgmac100->maccr);
319 static void ftgmac100_reset(struct eth_device *dev)
321 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
323 debug("%s()\n", __func__);
325 writel(FTGMAC100_MACCR_SW_RST, &ftgmac100->maccr);
327 while (readl(&ftgmac100->maccr) & FTGMAC100_MACCR_SW_RST)
334 static void ftgmac100_set_mac(struct eth_device *dev,
335 const unsigned char *mac)
337 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
338 unsigned int maddr = mac[0] << 8 | mac[1];
339 unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
341 debug("%s(%x %x)\n", __func__, maddr, laddr);
343 writel(maddr, &ftgmac100->mac_madr);
344 writel(laddr, &ftgmac100->mac_ladr);
347 static void ftgmac100_set_mac_from_env(struct eth_device *dev)
349 eth_getenv_enetaddr("ethaddr", dev->enetaddr);
351 ftgmac100_set_mac(dev, dev->enetaddr);
355 * disable transmitter, receiver
357 static void ftgmac100_halt(struct eth_device *dev)
359 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
361 debug("%s()\n", __func__);
363 writel(0, &ftgmac100->maccr);
366 static int ftgmac100_init(struct eth_device *dev, bd_t *bd)
368 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
369 struct ftgmac100_data *priv = dev->priv;
370 struct ftgmac100_txdes *txdes;
371 struct ftgmac100_rxdes *rxdes;
376 debug("%s()\n", __func__);
379 txdes = dma_alloc_coherent(
380 sizeof(*txdes) * PKTBUFSTX, &priv->txdes_dma);
382 panic("ftgmac100: out of memory\n");
383 memset(txdes, 0, sizeof(*txdes) * PKTBUFSTX);
389 rxdes = dma_alloc_coherent(
390 sizeof(*rxdes) * PKTBUFSRX, &priv->rxdes_dma);
392 panic("ftgmac100: out of memory\n");
393 memset(rxdes, 0, sizeof(*rxdes) * PKTBUFSRX);
398 /* set the ethernet address */
399 ftgmac100_set_mac_from_env(dev);
401 /* disable all interrupts */
402 writel(0, &ftgmac100->ier);
404 /* initialize descriptors */
408 txdes[PKTBUFSTX - 1].txdes0 = FTGMAC100_TXDES0_EDOTR;
409 rxdes[PKTBUFSRX - 1].rxdes0 = FTGMAC100_RXDES0_EDORR;
411 for (i = 0; i < PKTBUFSTX; i++) {
413 if (!txdes[i].txdes2) {
414 buf = memalign(ARCH_DMA_MINALIGN, CFG_XBUF_SIZE);
416 panic("ftgmac100: out of memory\n");
417 txdes[i].txdes3 = virt_to_phys(buf);
418 txdes[i].txdes2 = (uint)buf;
423 for (i = 0; i < PKTBUFSRX; i++) {
425 if (!rxdes[i].rxdes2) {
426 buf = net_rx_packets[i];
427 rxdes[i].rxdes3 = virt_to_phys(buf);
428 rxdes[i].rxdes2 = (uint)buf;
430 rxdes[i].rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
434 writel(priv->txdes_dma, &ftgmac100->txr_badr);
437 writel(priv->rxdes_dma, &ftgmac100->rxr_badr);
439 /* poll receive descriptor automatically */
440 writel(FTGMAC100_APTC_RXPOLL_CNT(1), &ftgmac100->aptc);
442 /* config receive buffer size register */
443 writel(FTGMAC100_RBSR_SIZE(RBSR_DEFAULT_VALUE), &ftgmac100->rbsr);
445 /* enable transmitter, receiver */
446 maccr = FTGMAC100_MACCR_TXMAC_EN |
447 FTGMAC100_MACCR_RXMAC_EN |
448 FTGMAC100_MACCR_TXDMA_EN |
449 FTGMAC100_MACCR_RXDMA_EN |
450 FTGMAC100_MACCR_CRC_APD |
451 FTGMAC100_MACCR_FULLDUP |
452 FTGMAC100_MACCR_RX_RUNT |
453 FTGMAC100_MACCR_RX_BROADPKT;
455 writel(maccr, &ftgmac100->maccr);
457 if (!ftgmac100_phy_init(dev)) {
458 if (!ftgmac100_update_link_speed(dev))
466 * Get a data block via Ethernet
468 static int ftgmac100_recv(struct eth_device *dev)
470 struct ftgmac100_data *priv = dev->priv;
471 struct ftgmac100_rxdes *curr_des;
472 unsigned short rxlen;
474 curr_des = &priv->rxdes[priv->rx_index];
476 if (!(curr_des->rxdes0 & FTGMAC100_RXDES0_RXPKT_RDY))
479 if (curr_des->rxdes0 & (FTGMAC100_RXDES0_RX_ERR |
480 FTGMAC100_RXDES0_CRC_ERR |
481 FTGMAC100_RXDES0_FTL |
482 FTGMAC100_RXDES0_RUNT |
483 FTGMAC100_RXDES0_RX_ODD_NB)) {
487 rxlen = FTGMAC100_RXDES0_VDBC(curr_des->rxdes0);
489 debug("%s(): RX buffer %d, %x received\n",
490 __func__, priv->rx_index, rxlen);
492 /* invalidate d-cache */
493 dma_map_single((void *)curr_des->rxdes2, rxlen, DMA_FROM_DEVICE);
495 /* pass the packet up to the protocol layers. */
496 net_process_received_packet((void *)curr_des->rxdes2, rxlen);
498 /* release buffer to DMA */
499 curr_des->rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
501 priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
507 * Send a data block via Ethernet
509 static int ftgmac100_send(struct eth_device *dev, void *packet, int length)
511 struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
512 struct ftgmac100_data *priv = dev->priv;
513 struct ftgmac100_txdes *curr_des = &priv->txdes[priv->tx_index];
515 if (curr_des->txdes0 & FTGMAC100_TXDES0_TXDMA_OWN) {
516 debug("%s(): no TX descriptor available\n", __func__);
520 debug("%s(%x, %x)\n", __func__, (int)packet, length);
522 length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
524 memcpy((void *)curr_des->txdes2, (void *)packet, length);
525 dma_map_single((void *)curr_des->txdes2, length, DMA_TO_DEVICE);
527 /* only one descriptor on TXBUF */
528 curr_des->txdes0 &= FTGMAC100_TXDES0_EDOTR;
529 curr_des->txdes0 |= FTGMAC100_TXDES0_FTS |
530 FTGMAC100_TXDES0_LTS |
531 FTGMAC100_TXDES0_TXBUF_SIZE(length) |
532 FTGMAC100_TXDES0_TXDMA_OWN ;
535 writel(1, &ftgmac100->txpd);
537 debug("%s(): packet sent\n", __func__);
539 priv->tx_index = (priv->tx_index + 1) % PKTBUFSTX;
544 int ftgmac100_initialize(bd_t *bd)
546 struct eth_device *dev;
547 struct ftgmac100_data *priv;
549 dev = malloc(sizeof *dev);
551 printf("%s(): failed to allocate dev\n", __func__);
555 /* Transmit and receive descriptors should align to 16 bytes */
556 priv = memalign(16, sizeof(struct ftgmac100_data));
558 printf("%s(): failed to allocate priv\n", __func__);
562 memset(dev, 0, sizeof(*dev));
563 memset(priv, 0, sizeof(*priv));
565 strcpy(dev->name, "FTGMAC100");
566 dev->iobase = CONFIG_FTGMAC100_BASE;
567 dev->init = ftgmac100_init;
568 dev->halt = ftgmac100_halt;
569 dev->send = ftgmac100_send;
570 dev->recv = ftgmac100_recv;
575 ftgmac100_reset(dev);