3 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
5 * SPDX-License-Identifier: GPL-2.0+
9 * Designware ethernet IP driver for u-boot
15 #include <linux/compiler.h>
16 #include <linux/err.h>
18 #include "designware.h"
20 static int configure_phy(struct eth_device *dev);
22 static void tx_descs_init(struct eth_device *dev)
24 struct dw_eth_dev *priv = dev->priv;
25 struct eth_dma_regs *dma_p = priv->dma_regs_p;
26 struct dmamacdescr *desc_table_p = &priv->tx_mac_descrtable[0];
27 char *txbuffs = &priv->txbuffs[0];
28 struct dmamacdescr *desc_p;
31 for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
32 desc_p = &desc_table_p[idx];
33 desc_p->dmamac_addr = &txbuffs[idx * CONFIG_ETH_BUFSIZE];
34 desc_p->dmamac_next = &desc_table_p[idx + 1];
36 #if defined(CONFIG_DW_ALTDESCRIPTOR)
37 desc_p->txrx_status &= ~(DESC_TXSTS_TXINT | DESC_TXSTS_TXLAST |
38 DESC_TXSTS_TXFIRST | DESC_TXSTS_TXCRCDIS | \
39 DESC_TXSTS_TXCHECKINSCTRL | \
40 DESC_TXSTS_TXRINGEND | DESC_TXSTS_TXPADDIS);
42 desc_p->txrx_status |= DESC_TXSTS_TXCHAIN;
43 desc_p->dmamac_cntl = 0;
44 desc_p->txrx_status &= ~(DESC_TXSTS_MSK | DESC_TXSTS_OWNBYDMA);
46 desc_p->dmamac_cntl = DESC_TXCTRL_TXCHAIN;
47 desc_p->txrx_status = 0;
51 /* Correcting the last pointer of the chain */
52 desc_p->dmamac_next = &desc_table_p[0];
54 writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
57 static void rx_descs_init(struct eth_device *dev)
59 struct dw_eth_dev *priv = dev->priv;
60 struct eth_dma_regs *dma_p = priv->dma_regs_p;
61 struct dmamacdescr *desc_table_p = &priv->rx_mac_descrtable[0];
62 char *rxbuffs = &priv->rxbuffs[0];
63 struct dmamacdescr *desc_p;
66 for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
67 desc_p = &desc_table_p[idx];
68 desc_p->dmamac_addr = &rxbuffs[idx * CONFIG_ETH_BUFSIZE];
69 desc_p->dmamac_next = &desc_table_p[idx + 1];
72 (MAC_MAX_FRAME_SZ & DESC_RXCTRL_SIZE1MASK) | \
75 desc_p->txrx_status = DESC_RXSTS_OWNBYDMA;
78 /* Correcting the last pointer of the chain */
79 desc_p->dmamac_next = &desc_table_p[0];
81 writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
84 static void descs_init(struct eth_device *dev)
90 static int mac_reset(struct eth_device *dev)
92 struct dw_eth_dev *priv = dev->priv;
93 struct eth_mac_regs *mac_p = priv->mac_regs_p;
94 struct eth_dma_regs *dma_p = priv->dma_regs_p;
97 int timeout = CONFIG_MACRESET_TIMEOUT;
99 writel(DMAMAC_SRST, &dma_p->busmode);
101 if (priv->interface != PHY_INTERFACE_MODE_RGMII)
102 writel(MII_PORTSELECT, &mac_p->conf);
104 start = get_timer(0);
105 while (get_timer(start) < timeout) {
106 if (!(readl(&dma_p->busmode) & DMAMAC_SRST))
109 /* Try again after 10usec */
116 static int dw_write_hwaddr(struct eth_device *dev)
118 struct dw_eth_dev *priv = dev->priv;
119 struct eth_mac_regs *mac_p = priv->mac_regs_p;
120 u32 macid_lo, macid_hi;
121 u8 *mac_id = &dev->enetaddr[0];
123 macid_lo = mac_id[0] + (mac_id[1] << 8) + \
124 (mac_id[2] << 16) + (mac_id[3] << 24);
125 macid_hi = mac_id[4] + (mac_id[5] << 8);
127 writel(macid_hi, &mac_p->macaddr0hi);
128 writel(macid_lo, &mac_p->macaddr0lo);
133 static int dw_eth_init(struct eth_device *dev, bd_t *bis)
135 struct dw_eth_dev *priv = dev->priv;
136 struct eth_mac_regs *mac_p = priv->mac_regs_p;
137 struct eth_dma_regs *dma_p = priv->dma_regs_p;
140 if (priv->phy_configured != 1)
143 /* Print link status only once */
144 if (!priv->link_printed) {
145 printf("ENET Speed is %d Mbps - %s duplex connection\n",
146 priv->speed, (priv->duplex == HALF) ? "HALF" : "FULL");
147 priv->link_printed = 1;
150 /* Reset ethernet hardware */
151 if (mac_reset(dev) < 0)
154 /* Resore the HW MAC address as it has been lost during MAC reset */
155 dw_write_hwaddr(dev);
157 writel(FIXEDBURST | PRIORXTX_41 | BURST_16,
160 writel(readl(&dma_p->opmode) | FLUSHTXFIFO | STOREFORWARD |
161 TXSECONDFRAME, &dma_p->opmode);
163 conf = FRAMEBURSTENABLE | DISABLERXOWN;
165 if (priv->speed != 1000)
166 conf |= MII_PORTSELECT;
168 if ((priv->interface != PHY_INTERFACE_MODE_MII) &&
169 (priv->interface != PHY_INTERFACE_MODE_GMII)) {
171 if (priv->speed == 100)
175 if (priv->duplex == FULL)
176 conf |= FULLDPLXMODE;
178 writel(conf, &mac_p->conf);
183 * Start/Enable xfer at dma as well as mac level
185 writel(readl(&dma_p->opmode) | RXSTART, &dma_p->opmode);
186 writel(readl(&dma_p->opmode) | TXSTART, &dma_p->opmode);
188 writel(readl(&mac_p->conf) | RXENABLE | TXENABLE, &mac_p->conf);
193 static int dw_eth_send(struct eth_device *dev, void *packet, int length)
195 struct dw_eth_dev *priv = dev->priv;
196 struct eth_dma_regs *dma_p = priv->dma_regs_p;
197 u32 desc_num = priv->tx_currdescnum;
198 struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
200 /* Check if the descriptor is owned by CPU */
201 if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {
202 printf("CPU not owner of tx frame\n");
206 memcpy((void *)desc_p->dmamac_addr, packet, length);
208 #if defined(CONFIG_DW_ALTDESCRIPTOR)
209 desc_p->txrx_status |= DESC_TXSTS_TXFIRST | DESC_TXSTS_TXLAST;
210 desc_p->dmamac_cntl |= (length << DESC_TXCTRL_SIZE1SHFT) & \
211 DESC_TXCTRL_SIZE1MASK;
213 desc_p->txrx_status &= ~(DESC_TXSTS_MSK);
214 desc_p->txrx_status |= DESC_TXSTS_OWNBYDMA;
216 desc_p->dmamac_cntl |= ((length << DESC_TXCTRL_SIZE1SHFT) & \
217 DESC_TXCTRL_SIZE1MASK) | DESC_TXCTRL_TXLAST | \
220 desc_p->txrx_status = DESC_TXSTS_OWNBYDMA;
223 /* Test the wrap-around condition. */
224 if (++desc_num >= CONFIG_TX_DESCR_NUM)
227 priv->tx_currdescnum = desc_num;
229 /* Start the transmission */
230 writel(POLL_DATA, &dma_p->txpolldemand);
235 static int dw_eth_recv(struct eth_device *dev)
237 struct dw_eth_dev *priv = dev->priv;
238 u32 desc_num = priv->rx_currdescnum;
239 struct dmamacdescr *desc_p = &priv->rx_mac_descrtable[desc_num];
241 u32 status = desc_p->txrx_status;
244 /* Check if the owner is the CPU */
245 if (!(status & DESC_RXSTS_OWNBYDMA)) {
247 length = (status & DESC_RXSTS_FRMLENMSK) >> \
248 DESC_RXSTS_FRMLENSHFT;
250 NetReceive(desc_p->dmamac_addr, length);
253 * Make the current descriptor valid again and go to
256 desc_p->txrx_status |= DESC_RXSTS_OWNBYDMA;
258 /* Test the wrap-around condition. */
259 if (++desc_num >= CONFIG_RX_DESCR_NUM)
263 priv->rx_currdescnum = desc_num;
268 static void dw_eth_halt(struct eth_device *dev)
270 struct dw_eth_dev *priv = dev->priv;
273 priv->tx_currdescnum = priv->rx_currdescnum = 0;
276 static int eth_mdio_read(struct eth_device *dev, u8 addr, u8 reg, u16 *val)
278 struct dw_eth_dev *priv = dev->priv;
279 struct eth_mac_regs *mac_p = priv->mac_regs_p;
282 int timeout = CONFIG_MDIO_TIMEOUT;
284 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
285 ((reg << MIIREGSHIFT) & MII_REGMSK);
287 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
289 start = get_timer(0);
290 while (get_timer(start) < timeout) {
291 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
292 *val = readl(&mac_p->miidata);
296 /* Try again after 10usec */
303 static int eth_mdio_write(struct eth_device *dev, u8 addr, u8 reg, u16 val)
305 struct dw_eth_dev *priv = dev->priv;
306 struct eth_mac_regs *mac_p = priv->mac_regs_p;
309 int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
312 writel(val, &mac_p->miidata);
313 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
314 ((reg << MIIREGSHIFT) & MII_REGMSK) | MII_WRITE;
316 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
318 start = get_timer(0);
319 while (get_timer(start) < timeout) {
320 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
325 /* Try again after 10usec */
329 /* Needed as a fix for ST-Phy */
330 eth_mdio_read(dev, addr, reg, &value);
335 #if defined(CONFIG_DW_SEARCH_PHY)
336 static int find_phy(struct eth_device *dev)
342 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
343 oldctrl = ctrl & BMCR_ANENABLE;
345 ctrl ^= BMCR_ANENABLE;
346 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
347 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
348 ctrl &= BMCR_ANENABLE;
350 if (ctrl == oldctrl) {
353 ctrl ^= BMCR_ANENABLE;
354 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
358 } while (phy_addr < 32);
364 static int dw_reset_phy(struct eth_device *dev)
366 struct dw_eth_dev *priv = dev->priv;
369 int timeout = CONFIG_PHYRESET_TIMEOUT;
370 u32 phy_addr = priv->address;
372 eth_mdio_write(dev, phy_addr, MII_BMCR, BMCR_RESET);
374 start = get_timer(0);
375 while (get_timer(start) < timeout) {
376 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
377 if (!(ctrl & BMCR_RESET))
380 /* Try again after 10usec */
384 if (get_timer(start) >= CONFIG_PHYRESET_TIMEOUT)
387 #ifdef CONFIG_PHY_RESET_DELAY
388 udelay(CONFIG_PHY_RESET_DELAY);
394 * Add weak default function for board specific PHY configuration
396 int __weak designware_board_phy_init(struct eth_device *dev, int phy_addr,
397 int (*mii_write)(struct eth_device *, u8, u8, u16),
398 int dw_reset_phy(struct eth_device *))
403 static int configure_phy(struct eth_device *dev)
405 struct dw_eth_dev *priv = dev->priv;
408 #if defined(CONFIG_DW_AUTONEG)
414 #if defined(CONFIG_DW_SEARCH_PHY)
415 phy_addr = find_phy(dev);
417 priv->address = phy_addr;
421 phy_addr = priv->address;
425 * Some boards need board specific PHY initialization. This is
426 * after the main driver init code but before the auto negotiation
429 if (designware_board_phy_init(dev, phy_addr,
430 eth_mdio_write, dw_reset_phy) < 0)
433 if (dw_reset_phy(dev) < 0)
436 #if defined(CONFIG_DW_AUTONEG)
437 /* Set Auto-Neg Advertisement capabilities to 10/100 half/full */
438 eth_mdio_write(dev, phy_addr, MII_ADVERTISE, 0x1E1);
440 bmcr = BMCR_ANENABLE | BMCR_ANRESTART;
442 bmcr = BMCR_SPEED100 | BMCR_FULLDPLX;
444 #if defined(CONFIG_DW_SPEED10M)
445 bmcr &= ~BMCR_SPEED100;
447 #if defined(CONFIG_DW_DUPLEXHALF)
448 bmcr &= ~BMCR_FULLDPLX;
451 if (eth_mdio_write(dev, phy_addr, MII_BMCR, bmcr) < 0)
454 /* Read the phy status register and populate priv structure */
455 #if defined(CONFIG_DW_AUTONEG)
456 timeout = CONFIG_AUTONEG_TIMEOUT;
457 start = get_timer(0);
458 puts("Waiting for PHY auto negotiation to complete");
459 while (get_timer(start) < timeout) {
460 eth_mdio_read(dev, phy_addr, MII_BMSR, &bmsr);
461 if (bmsr & BMSR_ANEGCOMPLETE) {
462 priv->phy_configured = 1;
466 /* Print dot all 1s to show progress */
467 if ((get_timer(start) % 1000) == 0)
470 /* Try again after 1msec */
474 if (!(bmsr & BMSR_ANEGCOMPLETE))
479 priv->phy_configured = 1;
482 priv->speed = miiphy_speed(dev->name, phy_addr);
483 priv->duplex = miiphy_duplex(dev->name, phy_addr);
488 #if defined(CONFIG_MII)
489 static int dw_mii_read(const char *devname, u8 addr, u8 reg, u16 *val)
491 struct eth_device *dev;
493 dev = eth_get_dev_by_name(devname);
495 eth_mdio_read(dev, addr, reg, val);
500 static int dw_mii_write(const char *devname, u8 addr, u8 reg, u16 val)
502 struct eth_device *dev;
504 dev = eth_get_dev_by_name(devname);
506 eth_mdio_write(dev, addr, reg, val);
512 int designware_initialize(u32 id, ulong base_addr, u32 phy_addr, u32 interface)
514 struct eth_device *dev;
515 struct dw_eth_dev *priv;
517 dev = (struct eth_device *) malloc(sizeof(struct eth_device));
522 * Since the priv structure contains the descriptors which need a strict
523 * buswidth alignment, memalign is used to allocate memory
525 priv = (struct dw_eth_dev *) memalign(16, sizeof(struct dw_eth_dev));
531 memset(dev, 0, sizeof(struct eth_device));
532 memset(priv, 0, sizeof(struct dw_eth_dev));
534 sprintf(dev->name, "mii%d", id);
535 dev->iobase = (int)base_addr;
538 eth_getenv_enetaddr_by_index("eth", id, &dev->enetaddr[0]);
541 priv->mac_regs_p = (struct eth_mac_regs *)base_addr;
542 priv->dma_regs_p = (struct eth_dma_regs *)(base_addr +
544 priv->address = phy_addr;
545 priv->phy_configured = 0;
546 priv->interface = interface;
548 dev->init = dw_eth_init;
549 dev->send = dw_eth_send;
550 dev->recv = dw_eth_recv;
551 dev->halt = dw_eth_halt;
552 dev->write_hwaddr = dw_write_hwaddr;
556 #if defined(CONFIG_MII)
557 miiphy_register(dev->name, dw_mii_read, dw_mii_write);