3 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * Designware ethernet IP driver for u-boot
31 #include <linux/compiler.h>
32 #include <linux/err.h>
34 #include "designware.h"
36 static int configure_phy(struct eth_device *dev);
38 static void tx_descs_init(struct eth_device *dev)
40 struct dw_eth_dev *priv = dev->priv;
41 struct eth_dma_regs *dma_p = priv->dma_regs_p;
42 struct dmamacdescr *desc_table_p = &priv->tx_mac_descrtable[0];
43 char *txbuffs = &priv->txbuffs[0];
44 struct dmamacdescr *desc_p;
47 for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
48 desc_p = &desc_table_p[idx];
49 desc_p->dmamac_addr = &txbuffs[idx * CONFIG_ETH_BUFSIZE];
50 desc_p->dmamac_next = &desc_table_p[idx + 1];
52 #if defined(CONFIG_DW_ALTDESCRIPTOR)
53 desc_p->txrx_status &= ~(DESC_TXSTS_TXINT | DESC_TXSTS_TXLAST |
54 DESC_TXSTS_TXFIRST | DESC_TXSTS_TXCRCDIS | \
55 DESC_TXSTS_TXCHECKINSCTRL | \
56 DESC_TXSTS_TXRINGEND | DESC_TXSTS_TXPADDIS);
58 desc_p->txrx_status |= DESC_TXSTS_TXCHAIN;
59 desc_p->dmamac_cntl = 0;
60 desc_p->txrx_status &= ~(DESC_TXSTS_MSK | DESC_TXSTS_OWNBYDMA);
62 desc_p->dmamac_cntl = DESC_TXCTRL_TXCHAIN;
63 desc_p->txrx_status = 0;
67 /* Correcting the last pointer of the chain */
68 desc_p->dmamac_next = &desc_table_p[0];
70 writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
73 static void rx_descs_init(struct eth_device *dev)
75 struct dw_eth_dev *priv = dev->priv;
76 struct eth_dma_regs *dma_p = priv->dma_regs_p;
77 struct dmamacdescr *desc_table_p = &priv->rx_mac_descrtable[0];
78 char *rxbuffs = &priv->rxbuffs[0];
79 struct dmamacdescr *desc_p;
82 for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
83 desc_p = &desc_table_p[idx];
84 desc_p->dmamac_addr = &rxbuffs[idx * CONFIG_ETH_BUFSIZE];
85 desc_p->dmamac_next = &desc_table_p[idx + 1];
88 (MAC_MAX_FRAME_SZ & DESC_RXCTRL_SIZE1MASK) | \
91 desc_p->txrx_status = DESC_RXSTS_OWNBYDMA;
94 /* Correcting the last pointer of the chain */
95 desc_p->dmamac_next = &desc_table_p[0];
97 writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
100 static void descs_init(struct eth_device *dev)
106 static int mac_reset(struct eth_device *dev)
108 struct dw_eth_dev *priv = dev->priv;
109 struct eth_mac_regs *mac_p = priv->mac_regs_p;
110 struct eth_dma_regs *dma_p = priv->dma_regs_p;
113 int timeout = CONFIG_MACRESET_TIMEOUT;
115 writel(DMAMAC_SRST, &dma_p->busmode);
117 if (priv->interface != PHY_INTERFACE_MODE_RGMII)
118 writel(MII_PORTSELECT, &mac_p->conf);
120 start = get_timer(0);
121 while (get_timer(start) < timeout) {
122 if (!(readl(&dma_p->busmode) & DMAMAC_SRST))
125 /* Try again after 10usec */
132 static int dw_write_hwaddr(struct eth_device *dev)
134 struct dw_eth_dev *priv = dev->priv;
135 struct eth_mac_regs *mac_p = priv->mac_regs_p;
136 u32 macid_lo, macid_hi;
137 u8 *mac_id = &dev->enetaddr[0];
139 macid_lo = mac_id[0] + (mac_id[1] << 8) + \
140 (mac_id[2] << 16) + (mac_id[3] << 24);
141 macid_hi = mac_id[4] + (mac_id[5] << 8);
143 writel(macid_hi, &mac_p->macaddr0hi);
144 writel(macid_lo, &mac_p->macaddr0lo);
149 static int dw_eth_init(struct eth_device *dev, bd_t *bis)
151 struct dw_eth_dev *priv = dev->priv;
152 struct eth_mac_regs *mac_p = priv->mac_regs_p;
153 struct eth_dma_regs *dma_p = priv->dma_regs_p;
156 if (priv->phy_configured != 1)
159 /* Print link status only once */
160 if (!priv->link_printed) {
161 printf("ENET Speed is %d Mbps - %s duplex connection\n",
162 priv->speed, (priv->duplex == HALF) ? "HALF" : "FULL");
163 priv->link_printed = 1;
166 /* Reset ethernet hardware */
167 if (mac_reset(dev) < 0)
170 /* Resore the HW MAC address as it has been lost during MAC reset */
171 dw_write_hwaddr(dev);
173 writel(FIXEDBURST | PRIORXTX_41 | BURST_16,
176 writel(readl(&dma_p->opmode) | FLUSHTXFIFO | STOREFORWARD |
177 TXSECONDFRAME, &dma_p->opmode);
179 conf = FRAMEBURSTENABLE | DISABLERXOWN;
181 if (priv->speed != 1000)
182 conf |= MII_PORTSELECT;
184 if ((priv->interface != PHY_INTERFACE_MODE_MII) &&
185 (priv->interface != PHY_INTERFACE_MODE_GMII)) {
187 if (priv->speed == 100)
191 if (priv->duplex == FULL)
192 conf |= FULLDPLXMODE;
194 writel(conf, &mac_p->conf);
199 * Start/Enable xfer at dma as well as mac level
201 writel(readl(&dma_p->opmode) | RXSTART, &dma_p->opmode);
202 writel(readl(&dma_p->opmode) | TXSTART, &dma_p->opmode);
204 writel(readl(&mac_p->conf) | RXENABLE | TXENABLE, &mac_p->conf);
209 static int dw_eth_send(struct eth_device *dev, void *packet, int length)
211 struct dw_eth_dev *priv = dev->priv;
212 struct eth_dma_regs *dma_p = priv->dma_regs_p;
213 u32 desc_num = priv->tx_currdescnum;
214 struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
216 /* Check if the descriptor is owned by CPU */
217 if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {
218 printf("CPU not owner of tx frame\n");
222 memcpy((void *)desc_p->dmamac_addr, packet, length);
224 #if defined(CONFIG_DW_ALTDESCRIPTOR)
225 desc_p->txrx_status |= DESC_TXSTS_TXFIRST | DESC_TXSTS_TXLAST;
226 desc_p->dmamac_cntl |= (length << DESC_TXCTRL_SIZE1SHFT) & \
227 DESC_TXCTRL_SIZE1MASK;
229 desc_p->txrx_status &= ~(DESC_TXSTS_MSK);
230 desc_p->txrx_status |= DESC_TXSTS_OWNBYDMA;
232 desc_p->dmamac_cntl |= ((length << DESC_TXCTRL_SIZE1SHFT) & \
233 DESC_TXCTRL_SIZE1MASK) | DESC_TXCTRL_TXLAST | \
236 desc_p->txrx_status = DESC_TXSTS_OWNBYDMA;
239 /* Test the wrap-around condition. */
240 if (++desc_num >= CONFIG_TX_DESCR_NUM)
243 priv->tx_currdescnum = desc_num;
245 /* Start the transmission */
246 writel(POLL_DATA, &dma_p->txpolldemand);
251 static int dw_eth_recv(struct eth_device *dev)
253 struct dw_eth_dev *priv = dev->priv;
254 u32 desc_num = priv->rx_currdescnum;
255 struct dmamacdescr *desc_p = &priv->rx_mac_descrtable[desc_num];
257 u32 status = desc_p->txrx_status;
260 /* Check if the owner is the CPU */
261 if (!(status & DESC_RXSTS_OWNBYDMA)) {
263 length = (status & DESC_RXSTS_FRMLENMSK) >> \
264 DESC_RXSTS_FRMLENSHFT;
266 NetReceive(desc_p->dmamac_addr, length);
269 * Make the current descriptor valid again and go to
272 desc_p->txrx_status |= DESC_RXSTS_OWNBYDMA;
274 /* Test the wrap-around condition. */
275 if (++desc_num >= CONFIG_RX_DESCR_NUM)
279 priv->rx_currdescnum = desc_num;
284 static void dw_eth_halt(struct eth_device *dev)
286 struct dw_eth_dev *priv = dev->priv;
289 priv->tx_currdescnum = priv->rx_currdescnum = 0;
292 static int eth_mdio_read(struct eth_device *dev, u8 addr, u8 reg, u16 *val)
294 struct dw_eth_dev *priv = dev->priv;
295 struct eth_mac_regs *mac_p = priv->mac_regs_p;
298 int timeout = CONFIG_MDIO_TIMEOUT;
300 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
301 ((reg << MIIREGSHIFT) & MII_REGMSK);
303 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
305 start = get_timer(0);
306 while (get_timer(start) < timeout) {
307 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
308 *val = readl(&mac_p->miidata);
312 /* Try again after 10usec */
319 static int eth_mdio_write(struct eth_device *dev, u8 addr, u8 reg, u16 val)
321 struct dw_eth_dev *priv = dev->priv;
322 struct eth_mac_regs *mac_p = priv->mac_regs_p;
325 int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
328 writel(val, &mac_p->miidata);
329 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
330 ((reg << MIIREGSHIFT) & MII_REGMSK) | MII_WRITE;
332 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
334 start = get_timer(0);
335 while (get_timer(start) < timeout) {
336 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
341 /* Try again after 10usec */
345 /* Needed as a fix for ST-Phy */
346 eth_mdio_read(dev, addr, reg, &value);
351 #if defined(CONFIG_DW_SEARCH_PHY)
352 static int find_phy(struct eth_device *dev)
358 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
359 oldctrl = ctrl & BMCR_ANENABLE;
361 ctrl ^= BMCR_ANENABLE;
362 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
363 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
364 ctrl &= BMCR_ANENABLE;
366 if (ctrl == oldctrl) {
369 ctrl ^= BMCR_ANENABLE;
370 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
374 } while (phy_addr < 32);
380 static int dw_reset_phy(struct eth_device *dev)
382 struct dw_eth_dev *priv = dev->priv;
385 int timeout = CONFIG_PHYRESET_TIMEOUT;
386 u32 phy_addr = priv->address;
388 eth_mdio_write(dev, phy_addr, MII_BMCR, BMCR_RESET);
390 start = get_timer(0);
391 while (get_timer(start) < timeout) {
392 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
393 if (!(ctrl & BMCR_RESET))
396 /* Try again after 10usec */
400 if (get_timer(start) >= CONFIG_PHYRESET_TIMEOUT)
403 #ifdef CONFIG_PHY_RESET_DELAY
404 udelay(CONFIG_PHY_RESET_DELAY);
410 * Add weak default function for board specific PHY configuration
412 int __weak designware_board_phy_init(struct eth_device *dev, int phy_addr,
413 int (*mii_write)(struct eth_device *, u8, u8, u16),
414 int dw_reset_phy(struct eth_device *))
419 static int configure_phy(struct eth_device *dev)
421 struct dw_eth_dev *priv = dev->priv;
424 #if defined(CONFIG_DW_AUTONEG)
430 #if defined(CONFIG_DW_SEARCH_PHY)
431 phy_addr = find_phy(dev);
433 priv->address = phy_addr;
437 phy_addr = priv->address;
441 * Some boards need board specific PHY initialization. This is
442 * after the main driver init code but before the auto negotiation
445 if (designware_board_phy_init(dev, phy_addr,
446 eth_mdio_write, dw_reset_phy) < 0)
449 if (dw_reset_phy(dev) < 0)
452 #if defined(CONFIG_DW_AUTONEG)
453 /* Set Auto-Neg Advertisement capabilities to 10/100 half/full */
454 eth_mdio_write(dev, phy_addr, MII_ADVERTISE, 0x1E1);
456 bmcr = BMCR_ANENABLE | BMCR_ANRESTART;
458 bmcr = BMCR_SPEED100 | BMCR_FULLDPLX;
460 #if defined(CONFIG_DW_SPEED10M)
461 bmcr &= ~BMCR_SPEED100;
463 #if defined(CONFIG_DW_DUPLEXHALF)
464 bmcr &= ~BMCR_FULLDPLX;
467 if (eth_mdio_write(dev, phy_addr, MII_BMCR, bmcr) < 0)
470 /* Read the phy status register and populate priv structure */
471 #if defined(CONFIG_DW_AUTONEG)
472 timeout = CONFIG_AUTONEG_TIMEOUT;
473 start = get_timer(0);
474 puts("Waiting for PHY auto negotiation to complete");
475 while (get_timer(start) < timeout) {
476 eth_mdio_read(dev, phy_addr, MII_BMSR, &bmsr);
477 if (bmsr & BMSR_ANEGCOMPLETE) {
478 priv->phy_configured = 1;
482 /* Print dot all 1s to show progress */
483 if ((get_timer(start) % 1000) == 0)
486 /* Try again after 1msec */
490 if (!(bmsr & BMSR_ANEGCOMPLETE))
495 priv->phy_configured = 1;
498 priv->speed = miiphy_speed(dev->name, phy_addr);
499 priv->duplex = miiphy_duplex(dev->name, phy_addr);
504 #if defined(CONFIG_MII)
505 static int dw_mii_read(const char *devname, u8 addr, u8 reg, u16 *val)
507 struct eth_device *dev;
509 dev = eth_get_dev_by_name(devname);
511 eth_mdio_read(dev, addr, reg, val);
516 static int dw_mii_write(const char *devname, u8 addr, u8 reg, u16 val)
518 struct eth_device *dev;
520 dev = eth_get_dev_by_name(devname);
522 eth_mdio_write(dev, addr, reg, val);
528 int designware_initialize(u32 id, ulong base_addr, u32 phy_addr, u32 interface)
530 struct eth_device *dev;
531 struct dw_eth_dev *priv;
533 dev = (struct eth_device *) malloc(sizeof(struct eth_device));
538 * Since the priv structure contains the descriptors which need a strict
539 * buswidth alignment, memalign is used to allocate memory
541 priv = (struct dw_eth_dev *) memalign(16, sizeof(struct dw_eth_dev));
547 memset(dev, 0, sizeof(struct eth_device));
548 memset(priv, 0, sizeof(struct dw_eth_dev));
550 sprintf(dev->name, "mii%d", id);
551 dev->iobase = (int)base_addr;
554 eth_getenv_enetaddr_by_index("eth", id, &dev->enetaddr[0]);
557 priv->mac_regs_p = (struct eth_mac_regs *)base_addr;
558 priv->dma_regs_p = (struct eth_dma_regs *)(base_addr +
560 priv->address = phy_addr;
561 priv->phy_configured = 0;
562 priv->interface = interface;
564 dev->init = dw_eth_init;
565 dev->send = dw_eth_send;
566 dev->recv = dw_eth_recv;
567 dev->halt = dw_eth_halt;
568 dev->write_hwaddr = dw_write_hwaddr;
572 #if defined(CONFIG_MII)
573 miiphy_register(dev->name, dw_mii_read, dw_mii_write);