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 #if !defined(CONFIG_PHYLIB)
21 # error "DesignWare Ether MAC requires PHYLIB - missing CONFIG_PHYLIB"
24 static int dw_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
26 struct eth_mac_regs *mac_p = bus->priv;
29 int timeout = CONFIG_MDIO_TIMEOUT;
31 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) |
32 ((reg << MIIREGSHIFT) & MII_REGMSK);
34 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
37 while (get_timer(start) < timeout) {
38 if (!(readl(&mac_p->miiaddr) & MII_BUSY))
39 return readl(&mac_p->miidata);
46 static int dw_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
49 struct eth_mac_regs *mac_p = bus->priv;
52 int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
54 writel(val, &mac_p->miidata);
55 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) |
56 ((reg << MIIREGSHIFT) & MII_REGMSK) | MII_WRITE;
58 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
61 while (get_timer(start) < timeout) {
62 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
72 static int dw_mdio_init(char *name, struct eth_mac_regs *mac_regs_p)
74 struct mii_dev *bus = mdio_alloc();
77 printf("Failed to allocate MDIO bus\n");
81 bus->read = dw_mdio_read;
82 bus->write = dw_mdio_write;
83 sprintf(bus->name, name);
85 bus->priv = (void *)mac_regs_p;
87 return mdio_register(bus);
90 static void tx_descs_init(struct eth_device *dev)
92 struct dw_eth_dev *priv = dev->priv;
93 struct eth_dma_regs *dma_p = priv->dma_regs_p;
94 struct dmamacdescr *desc_table_p = &priv->tx_mac_descrtable[0];
95 char *txbuffs = &priv->txbuffs[0];
96 struct dmamacdescr *desc_p;
99 for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
100 desc_p = &desc_table_p[idx];
101 desc_p->dmamac_addr = &txbuffs[idx * CONFIG_ETH_BUFSIZE];
102 desc_p->dmamac_next = &desc_table_p[idx + 1];
104 #if defined(CONFIG_DW_ALTDESCRIPTOR)
105 desc_p->txrx_status &= ~(DESC_TXSTS_TXINT | DESC_TXSTS_TXLAST |
106 DESC_TXSTS_TXFIRST | DESC_TXSTS_TXCRCDIS | \
107 DESC_TXSTS_TXCHECKINSCTRL | \
108 DESC_TXSTS_TXRINGEND | DESC_TXSTS_TXPADDIS);
110 desc_p->txrx_status |= DESC_TXSTS_TXCHAIN;
111 desc_p->dmamac_cntl = 0;
112 desc_p->txrx_status &= ~(DESC_TXSTS_MSK | DESC_TXSTS_OWNBYDMA);
114 desc_p->dmamac_cntl = DESC_TXCTRL_TXCHAIN;
115 desc_p->txrx_status = 0;
119 /* Correcting the last pointer of the chain */
120 desc_p->dmamac_next = &desc_table_p[0];
122 writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
123 priv->tx_currdescnum = 0;
126 static void rx_descs_init(struct eth_device *dev)
128 struct dw_eth_dev *priv = dev->priv;
129 struct eth_dma_regs *dma_p = priv->dma_regs_p;
130 struct dmamacdescr *desc_table_p = &priv->rx_mac_descrtable[0];
131 char *rxbuffs = &priv->rxbuffs[0];
132 struct dmamacdescr *desc_p;
135 for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
136 desc_p = &desc_table_p[idx];
137 desc_p->dmamac_addr = &rxbuffs[idx * CONFIG_ETH_BUFSIZE];
138 desc_p->dmamac_next = &desc_table_p[idx + 1];
140 desc_p->dmamac_cntl =
141 (MAC_MAX_FRAME_SZ & DESC_RXCTRL_SIZE1MASK) | \
144 desc_p->txrx_status = DESC_RXSTS_OWNBYDMA;
147 /* Correcting the last pointer of the chain */
148 desc_p->dmamac_next = &desc_table_p[0];
150 writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
151 priv->rx_currdescnum = 0;
154 static int dw_write_hwaddr(struct eth_device *dev)
156 struct dw_eth_dev *priv = dev->priv;
157 struct eth_mac_regs *mac_p = priv->mac_regs_p;
158 u32 macid_lo, macid_hi;
159 u8 *mac_id = &dev->enetaddr[0];
161 macid_lo = mac_id[0] + (mac_id[1] << 8) + (mac_id[2] << 16) +
163 macid_hi = mac_id[4] + (mac_id[5] << 8);
165 writel(macid_hi, &mac_p->macaddr0hi);
166 writel(macid_lo, &mac_p->macaddr0lo);
171 static void dw_adjust_link(struct eth_mac_regs *mac_p,
172 struct phy_device *phydev)
174 u32 conf = readl(&mac_p->conf) | FRAMEBURSTENABLE | DISABLERXOWN;
177 printf("%s: No link.\n", phydev->dev->name);
181 if (phydev->speed != 1000)
182 conf |= MII_PORTSELECT;
184 if (phydev->speed == 100)
188 conf |= FULLDPLXMODE;
190 writel(conf, &mac_p->conf);
192 printf("Speed: %d, %s duplex%s\n", phydev->speed,
193 (phydev->duplex) ? "full" : "half",
194 (phydev->port == PORT_FIBRE) ? ", fiber mode" : "");
197 static void dw_eth_halt(struct eth_device *dev)
199 struct dw_eth_dev *priv = dev->priv;
200 struct eth_mac_regs *mac_p = priv->mac_regs_p;
201 struct eth_dma_regs *dma_p = priv->dma_regs_p;
203 writel(readl(&mac_p->conf) & ~(RXENABLE | TXENABLE), &mac_p->conf);
204 writel(readl(&dma_p->opmode) & ~(RXSTART | TXSTART), &dma_p->opmode);
206 phy_shutdown(priv->phydev);
209 static int dw_eth_init(struct eth_device *dev, bd_t *bis)
211 struct dw_eth_dev *priv = dev->priv;
212 struct eth_mac_regs *mac_p = priv->mac_regs_p;
213 struct eth_dma_regs *dma_p = priv->dma_regs_p;
216 writel(readl(&dma_p->busmode) | DMAMAC_SRST, &dma_p->busmode);
218 start = get_timer(0);
219 while (readl(&dma_p->busmode) & DMAMAC_SRST) {
220 if (get_timer(start) >= CONFIG_MACRESET_TIMEOUT)
226 /* Soft reset above clears HW address registers.
227 * So we have to set it here once again */
228 dw_write_hwaddr(dev);
233 writel(FIXEDBURST | PRIORXTX_41 | BURST_16, &dma_p->busmode);
235 writel(readl(&dma_p->opmode) | FLUSHTXFIFO | STOREFORWARD,
238 writel(readl(&dma_p->opmode) | RXSTART | TXSTART, &dma_p->opmode);
240 /* Start up the PHY */
241 if (phy_startup(priv->phydev)) {
242 printf("Could not initialize PHY %s\n",
243 priv->phydev->dev->name);
247 dw_adjust_link(mac_p, priv->phydev);
249 if (!priv->phydev->link)
252 writel(readl(&mac_p->conf) | RXENABLE | TXENABLE, &mac_p->conf);
257 static int dw_eth_send(struct eth_device *dev, void *packet, int length)
259 struct dw_eth_dev *priv = dev->priv;
260 struct eth_dma_regs *dma_p = priv->dma_regs_p;
261 u32 desc_num = priv->tx_currdescnum;
262 struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
264 /* Check if the descriptor is owned by CPU */
265 if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {
266 printf("CPU not owner of tx frame\n");
270 memcpy((void *)desc_p->dmamac_addr, packet, length);
272 #if defined(CONFIG_DW_ALTDESCRIPTOR)
273 desc_p->txrx_status |= DESC_TXSTS_TXFIRST | DESC_TXSTS_TXLAST;
274 desc_p->dmamac_cntl |= (length << DESC_TXCTRL_SIZE1SHFT) & \
275 DESC_TXCTRL_SIZE1MASK;
277 desc_p->txrx_status &= ~(DESC_TXSTS_MSK);
278 desc_p->txrx_status |= DESC_TXSTS_OWNBYDMA;
280 desc_p->dmamac_cntl |= ((length << DESC_TXCTRL_SIZE1SHFT) & \
281 DESC_TXCTRL_SIZE1MASK) | DESC_TXCTRL_TXLAST | \
284 desc_p->txrx_status = DESC_TXSTS_OWNBYDMA;
287 /* Test the wrap-around condition. */
288 if (++desc_num >= CONFIG_TX_DESCR_NUM)
291 priv->tx_currdescnum = desc_num;
293 /* Start the transmission */
294 writel(POLL_DATA, &dma_p->txpolldemand);
299 static int dw_eth_recv(struct eth_device *dev)
301 struct dw_eth_dev *priv = dev->priv;
302 u32 desc_num = priv->rx_currdescnum;
303 struct dmamacdescr *desc_p = &priv->rx_mac_descrtable[desc_num];
305 u32 status = desc_p->txrx_status;
308 /* Check if the owner is the CPU */
309 if (!(status & DESC_RXSTS_OWNBYDMA)) {
311 length = (status & DESC_RXSTS_FRMLENMSK) >> \
312 DESC_RXSTS_FRMLENSHFT;
314 NetReceive(desc_p->dmamac_addr, length);
317 * Make the current descriptor valid again and go to
320 desc_p->txrx_status |= DESC_RXSTS_OWNBYDMA;
322 /* Test the wrap-around condition. */
323 if (++desc_num >= CONFIG_RX_DESCR_NUM)
327 priv->rx_currdescnum = desc_num;
332 static int dw_phy_init(struct eth_device *dev)
334 struct dw_eth_dev *priv = dev->priv;
335 struct phy_device *phydev;
336 int mask = 0xffffffff;
338 #ifdef CONFIG_PHY_ADDR
339 mask = 1 << CONFIG_PHY_ADDR;
342 phydev = phy_find_by_mask(priv->bus, mask, priv->interface);
346 phydev->supported &= PHY_GBIT_FEATURES;
347 phydev->advertising = phydev->supported;
349 priv->phydev = phydev;
355 int designware_initialize(ulong base_addr, u32 interface)
357 struct eth_device *dev;
358 struct dw_eth_dev *priv;
360 dev = (struct eth_device *) malloc(sizeof(struct eth_device));
365 * Since the priv structure contains the descriptors which need a strict
366 * buswidth alignment, memalign is used to allocate memory
368 priv = (struct dw_eth_dev *) memalign(16, sizeof(struct dw_eth_dev));
374 memset(dev, 0, sizeof(struct eth_device));
375 memset(priv, 0, sizeof(struct dw_eth_dev));
377 sprintf(dev->name, "dwmac.%lx", base_addr);
378 dev->iobase = (int)base_addr;
382 priv->mac_regs_p = (struct eth_mac_regs *)base_addr;
383 priv->dma_regs_p = (struct eth_dma_regs *)(base_addr +
386 dev->init = dw_eth_init;
387 dev->send = dw_eth_send;
388 dev->recv = dw_eth_recv;
389 dev->halt = dw_eth_halt;
390 dev->write_hwaddr = dw_write_hwaddr;
394 priv->interface = interface;
396 dw_mdio_init(dev->name, priv->mac_regs_p);
397 priv->bus = miiphy_get_dev_by_name(dev->name);
399 return dw_phy_init(dev);