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);
116 writel(MII_PORTSELECT, &mac_p->conf);
118 start = get_timer(0);
119 while (get_timer(start) < timeout) {
120 if (!(readl(&dma_p->busmode) & DMAMAC_SRST))
123 /* Try again after 10usec */
130 static int dw_write_hwaddr(struct eth_device *dev)
132 struct dw_eth_dev *priv = dev->priv;
133 struct eth_mac_regs *mac_p = priv->mac_regs_p;
134 u32 macid_lo, macid_hi;
135 u8 *mac_id = &dev->enetaddr[0];
137 macid_lo = mac_id[0] + (mac_id[1] << 8) + \
138 (mac_id[2] << 16) + (mac_id[3] << 24);
139 macid_hi = mac_id[4] + (mac_id[5] << 8);
141 writel(macid_hi, &mac_p->macaddr0hi);
142 writel(macid_lo, &mac_p->macaddr0lo);
147 static int dw_eth_init(struct eth_device *dev, bd_t *bis)
149 struct dw_eth_dev *priv = dev->priv;
150 struct eth_mac_regs *mac_p = priv->mac_regs_p;
151 struct eth_dma_regs *dma_p = priv->dma_regs_p;
154 if (priv->phy_configured != 1)
157 /* Print link status only once */
158 if (!priv->link_printed) {
159 printf("ENET Speed is %d Mbps - %s duplex connection\n",
160 priv->speed, (priv->duplex == HALF) ? "HALF" : "FULL");
161 priv->link_printed = 1;
164 /* Reset ethernet hardware */
165 if (mac_reset(dev) < 0)
168 /* Resore the HW MAC address as it has been lost during MAC reset */
169 dw_write_hwaddr(dev);
171 writel(FIXEDBURST | PRIORXTX_41 | BURST_16,
174 writel(readl(&dma_p->opmode) | FLUSHTXFIFO | STOREFORWARD |
175 TXSECONDFRAME, &dma_p->opmode);
177 conf = FRAMEBURSTENABLE | DISABLERXOWN;
179 if (priv->speed != 1000)
180 conf |= MII_PORTSELECT;
182 if ((priv->interface != PHY_INTERFACE_MODE_MII) &&
183 (priv->interface != PHY_INTERFACE_MODE_GMII)) {
185 if (priv->speed == 100)
189 if (priv->duplex == FULL)
190 conf |= FULLDPLXMODE;
192 writel(conf, &mac_p->conf);
197 * Start/Enable xfer at dma as well as mac level
199 writel(readl(&dma_p->opmode) | RXSTART, &dma_p->opmode);
200 writel(readl(&dma_p->opmode) | TXSTART, &dma_p->opmode);
202 writel(readl(&mac_p->conf) | RXENABLE | TXENABLE, &mac_p->conf);
207 static int dw_eth_send(struct eth_device *dev, void *packet, int length)
209 struct dw_eth_dev *priv = dev->priv;
210 struct eth_dma_regs *dma_p = priv->dma_regs_p;
211 u32 desc_num = priv->tx_currdescnum;
212 struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
214 /* Check if the descriptor is owned by CPU */
215 if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {
216 printf("CPU not owner of tx frame\n");
220 memcpy((void *)desc_p->dmamac_addr, packet, length);
222 #if defined(CONFIG_DW_ALTDESCRIPTOR)
223 desc_p->txrx_status |= DESC_TXSTS_TXFIRST | DESC_TXSTS_TXLAST;
224 desc_p->dmamac_cntl |= (length << DESC_TXCTRL_SIZE1SHFT) & \
225 DESC_TXCTRL_SIZE1MASK;
227 desc_p->txrx_status &= ~(DESC_TXSTS_MSK);
228 desc_p->txrx_status |= DESC_TXSTS_OWNBYDMA;
230 desc_p->dmamac_cntl |= ((length << DESC_TXCTRL_SIZE1SHFT) & \
231 DESC_TXCTRL_SIZE1MASK) | DESC_TXCTRL_TXLAST | \
234 desc_p->txrx_status = DESC_TXSTS_OWNBYDMA;
237 /* Test the wrap-around condition. */
238 if (++desc_num >= CONFIG_TX_DESCR_NUM)
241 priv->tx_currdescnum = desc_num;
243 /* Start the transmission */
244 writel(POLL_DATA, &dma_p->txpolldemand);
249 static int dw_eth_recv(struct eth_device *dev)
251 struct dw_eth_dev *priv = dev->priv;
252 u32 desc_num = priv->rx_currdescnum;
253 struct dmamacdescr *desc_p = &priv->rx_mac_descrtable[desc_num];
255 u32 status = desc_p->txrx_status;
258 /* Check if the owner is the CPU */
259 if (!(status & DESC_RXSTS_OWNBYDMA)) {
261 length = (status & DESC_RXSTS_FRMLENMSK) >> \
262 DESC_RXSTS_FRMLENSHFT;
264 NetReceive(desc_p->dmamac_addr, length);
267 * Make the current descriptor valid again and go to
270 desc_p->txrx_status |= DESC_RXSTS_OWNBYDMA;
272 /* Test the wrap-around condition. */
273 if (++desc_num >= CONFIG_RX_DESCR_NUM)
277 priv->rx_currdescnum = desc_num;
282 static void dw_eth_halt(struct eth_device *dev)
284 struct dw_eth_dev *priv = dev->priv;
287 priv->tx_currdescnum = priv->rx_currdescnum = 0;
290 static int eth_mdio_read(struct eth_device *dev, u8 addr, u8 reg, u16 *val)
292 struct dw_eth_dev *priv = dev->priv;
293 struct eth_mac_regs *mac_p = priv->mac_regs_p;
296 int timeout = CONFIG_MDIO_TIMEOUT;
298 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
299 ((reg << MIIREGSHIFT) & MII_REGMSK);
301 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
303 start = get_timer(0);
304 while (get_timer(start) < timeout) {
305 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
306 *val = readl(&mac_p->miidata);
310 /* Try again after 10usec */
317 static int eth_mdio_write(struct eth_device *dev, u8 addr, u8 reg, u16 val)
319 struct dw_eth_dev *priv = dev->priv;
320 struct eth_mac_regs *mac_p = priv->mac_regs_p;
323 int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
326 writel(val, &mac_p->miidata);
327 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
328 ((reg << MIIREGSHIFT) & MII_REGMSK) | MII_WRITE;
330 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
332 start = get_timer(0);
333 while (get_timer(start) < timeout) {
334 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
339 /* Try again after 10usec */
343 /* Needed as a fix for ST-Phy */
344 eth_mdio_read(dev, addr, reg, &value);
349 #if defined(CONFIG_DW_SEARCH_PHY)
350 static int find_phy(struct eth_device *dev)
356 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
357 oldctrl = ctrl & BMCR_ANENABLE;
359 ctrl ^= BMCR_ANENABLE;
360 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
361 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
362 ctrl &= BMCR_ANENABLE;
364 if (ctrl == oldctrl) {
367 ctrl ^= BMCR_ANENABLE;
368 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
372 } while (phy_addr < 32);
378 static int dw_reset_phy(struct eth_device *dev)
380 struct dw_eth_dev *priv = dev->priv;
383 int timeout = CONFIG_PHYRESET_TIMEOUT;
384 u32 phy_addr = priv->address;
386 eth_mdio_write(dev, phy_addr, MII_BMCR, BMCR_RESET);
388 start = get_timer(0);
389 while (get_timer(start) < timeout) {
390 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
391 if (!(ctrl & BMCR_RESET))
394 /* Try again after 10usec */
398 if (get_timer(start) >= CONFIG_PHYRESET_TIMEOUT)
401 #ifdef CONFIG_PHY_RESET_DELAY
402 udelay(CONFIG_PHY_RESET_DELAY);
408 * Add weak default function for board specific PHY configuration
410 int __weak designware_board_phy_init(struct eth_device *dev, int phy_addr,
411 int (*mii_write)(struct eth_device *, u8, u8, u16),
412 int dw_reset_phy(struct eth_device *))
417 static int configure_phy(struct eth_device *dev)
419 struct dw_eth_dev *priv = dev->priv;
422 #if defined(CONFIG_DW_AUTONEG)
428 #if defined(CONFIG_DW_SEARCH_PHY)
429 phy_addr = find_phy(dev);
431 priv->address = phy_addr;
435 phy_addr = priv->address;
439 * Some boards need board specific PHY initialization. This is
440 * after the main driver init code but before the auto negotiation
443 if (designware_board_phy_init(dev, phy_addr,
444 eth_mdio_write, dw_reset_phy) < 0)
447 if (dw_reset_phy(dev) < 0)
450 #if defined(CONFIG_DW_AUTONEG)
451 /* Set Auto-Neg Advertisement capabilities to 10/100 half/full */
452 eth_mdio_write(dev, phy_addr, MII_ADVERTISE, 0x1E1);
454 bmcr = BMCR_ANENABLE | BMCR_ANRESTART;
456 bmcr = BMCR_SPEED100 | BMCR_FULLDPLX;
458 #if defined(CONFIG_DW_SPEED10M)
459 bmcr &= ~BMCR_SPEED100;
461 #if defined(CONFIG_DW_DUPLEXHALF)
462 bmcr &= ~BMCR_FULLDPLX;
465 if (eth_mdio_write(dev, phy_addr, MII_BMCR, bmcr) < 0)
468 /* Read the phy status register and populate priv structure */
469 #if defined(CONFIG_DW_AUTONEG)
470 timeout = CONFIG_AUTONEG_TIMEOUT;
471 start = get_timer(0);
472 puts("Waiting for PHY auto negotiation to complete");
473 while (get_timer(start) < timeout) {
474 eth_mdio_read(dev, phy_addr, MII_BMSR, &bmsr);
475 if (bmsr & BMSR_ANEGCOMPLETE) {
476 priv->phy_configured = 1;
480 /* Print dot all 1s to show progress */
481 if ((get_timer(start) % 1000) == 0)
484 /* Try again after 1msec */
488 if (!(bmsr & BMSR_ANEGCOMPLETE))
493 priv->phy_configured = 1;
496 priv->speed = miiphy_speed(dev->name, phy_addr);
497 priv->duplex = miiphy_duplex(dev->name, phy_addr);
502 #if defined(CONFIG_MII)
503 static int dw_mii_read(const char *devname, u8 addr, u8 reg, u16 *val)
505 struct eth_device *dev;
507 dev = eth_get_dev_by_name(devname);
509 eth_mdio_read(dev, addr, reg, val);
514 static int dw_mii_write(const char *devname, u8 addr, u8 reg, u16 val)
516 struct eth_device *dev;
518 dev = eth_get_dev_by_name(devname);
520 eth_mdio_write(dev, addr, reg, val);
526 int designware_initialize(u32 id, ulong base_addr, u32 phy_addr, u32 interface)
528 struct eth_device *dev;
529 struct dw_eth_dev *priv;
531 dev = (struct eth_device *) malloc(sizeof(struct eth_device));
536 * Since the priv structure contains the descriptors which need a strict
537 * buswidth alignment, memalign is used to allocate memory
539 priv = (struct dw_eth_dev *) memalign(16, sizeof(struct dw_eth_dev));
545 memset(dev, 0, sizeof(struct eth_device));
546 memset(priv, 0, sizeof(struct dw_eth_dev));
548 sprintf(dev->name, "mii%d", id);
549 dev->iobase = (int)base_addr;
552 eth_getenv_enetaddr_by_index("eth", id, &dev->enetaddr[0]);
555 priv->mac_regs_p = (struct eth_mac_regs *)base_addr;
556 priv->dma_regs_p = (struct eth_dma_regs *)(base_addr +
558 priv->address = phy_addr;
559 priv->phy_configured = 0;
560 priv->interface = interface;
562 dev->init = dw_eth_init;
563 dev->send = dw_eth_send;
564 dev->recv = dw_eth_recv;
565 dev->halt = dw_eth_halt;
566 dev->write_hwaddr = dw_write_hwaddr;
570 #if defined(CONFIG_MII)
571 miiphy_register(dev->name, dw_mii_read, dw_mii_write);