1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
13 #include <linux/ethtool.h>
14 #include <linux/mii.h>
15 #include "usb_ether.h"
19 * Lan7x infrastructure commands
21 int lan7x_write_reg(struct usb_device *udev, u32 index, u32 data)
24 ALLOC_CACHE_ALIGN_BUFFER(u32, tmpbuf, 1);
29 len = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
30 USB_VENDOR_REQUEST_WRITE_REGISTER,
31 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
32 0, index, tmpbuf, sizeof(data),
33 USB_CTRL_SET_TIMEOUT_MS);
34 if (len != sizeof(data)) {
35 debug("%s failed: index=%d, data=%d, len=%d",
36 __func__, index, data, len);
42 int lan7x_read_reg(struct usb_device *udev, u32 index, u32 *data)
45 ALLOC_CACHE_ALIGN_BUFFER(u32, tmpbuf, 1);
47 len = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
48 USB_VENDOR_REQUEST_READ_REGISTER,
49 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
50 0, index, tmpbuf, sizeof(*data),
51 USB_CTRL_GET_TIMEOUT_MS);
53 if (len != sizeof(*data)) {
54 debug("%s failed: index=%d, len=%d", __func__, index, len);
62 static int lan7x_phy_wait_not_busy(struct usb_device *udev)
64 return lan7x_wait_for_bit(udev, __func__,
65 MII_ACC, MII_ACC_MII_BUSY,
69 int lan7x_mdio_read(struct usb_device *udev, int phy_id, int idx)
73 /* confirm MII not busy */
74 if (lan7x_phy_wait_not_busy(udev)) {
75 debug("MII is busy in %s\n", __func__);
79 /* set the address, index & direction (read from PHY) */
80 addr = (phy_id << 11) | (idx << 6) |
81 MII_ACC_MII_READ | MII_ACC_MII_BUSY;
82 lan7x_write_reg(udev, MII_ACC, addr);
84 if (lan7x_phy_wait_not_busy(udev)) {
85 debug("Timed out reading MII reg %02X\n", idx);
89 lan7x_read_reg(udev, MII_DATA, &val);
94 void lan7x_mdio_write(struct usb_device *udev, int phy_id, int idx, int regval)
98 /* confirm MII not busy */
99 if (lan7x_phy_wait_not_busy(udev)) {
100 debug("MII is busy in %s\n", __func__);
104 lan7x_write_reg(udev, MII_DATA, regval);
106 /* set the address, index & direction (write to PHY) */
107 addr = (phy_id << 11) | (idx << 6) |
108 MII_ACC_MII_WRITE | MII_ACC_MII_BUSY;
109 lan7x_write_reg(udev, MII_ACC, addr);
111 if (lan7x_phy_wait_not_busy(udev))
112 debug("Timed out writing MII reg %02X\n", idx);
116 * Lan7x phylib wrappers
118 static int lan7x_phylib_mdio_read(struct mii_dev *bus,
119 int addr, int devad, int reg)
121 struct usb_device *udev = dev_get_parent_priv(bus->priv);
123 return lan7x_mdio_read(udev, addr, reg);
126 static int lan7x_phylib_mdio_write(struct mii_dev *bus,
127 int addr, int devad, int reg, u16 val)
129 struct usb_device *udev = dev_get_parent_priv(bus->priv);
131 lan7x_mdio_write(udev, addr, reg, (int)val);
137 * Lan7x eeprom functions
139 static int lan7x_eeprom_confirm_not_busy(struct usb_device *udev)
141 return lan7x_wait_for_bit(udev, __func__,
142 E2P_CMD, E2P_CMD_EPC_BUSY,
146 static int lan7x_wait_eeprom(struct usb_device *udev)
148 return lan7x_wait_for_bit(udev, __func__,
150 (E2P_CMD_EPC_BUSY | E2P_CMD_EPC_TIMEOUT),
154 static int lan7x_read_eeprom(struct usb_device *udev,
155 u32 offset, u32 length, u8 *data)
160 ret = lan7x_eeprom_confirm_not_busy(udev);
164 for (i = 0; i < length; i++) {
165 val = E2P_CMD_EPC_BUSY | E2P_CMD_EPC_CMD_READ |
166 (offset & E2P_CMD_EPC_ADDR_MASK);
167 lan7x_write_reg(udev, E2P_CMD, val);
169 ret = lan7x_wait_eeprom(udev);
173 lan7x_read_reg(udev, E2P_DATA, &val);
174 data[i] = val & 0xFF;
181 * Lan7x phylib functions
183 int lan7x_phylib_register(struct udevice *udev)
185 struct usb_device *usbdev = dev_get_parent_priv(udev);
186 struct lan7x_private *priv = dev_get_priv(udev);
189 priv->mdiobus = mdio_alloc();
190 if (!priv->mdiobus) {
191 printf("mdio_alloc failed\n");
194 priv->mdiobus->read = lan7x_phylib_mdio_read;
195 priv->mdiobus->write = lan7x_phylib_mdio_write;
196 sprintf(priv->mdiobus->name,
197 "lan7x_mdiobus-d%hu-p%hu", usbdev->devnum, usbdev->portnr);
198 priv->mdiobus->priv = (void *)udev;
200 ret = mdio_register(priv->mdiobus);
202 printf("mdio_register failed\n");
210 int lan7x_eth_phylib_connect(struct udevice *udev, struct ueth_data *dev)
212 struct lan7x_private *priv = dev_get_priv(udev);
214 priv->phydev = phy_connect(priv->mdiobus, dev->phy_id,
215 udev, PHY_INTERFACE_MODE_MII);
218 printf("phy_connect failed\n");
224 int lan7x_eth_phylib_config_start(struct udevice *udev)
226 struct lan7x_private *priv = dev_get_priv(udev);
229 /* configure supported modes */
230 priv->phydev->supported = PHY_BASIC_FEATURES |
231 SUPPORTED_1000baseT_Full |
233 SUPPORTED_Asym_Pause;
235 priv->phydev->advertising = ADVERTISED_10baseT_Half |
236 ADVERTISED_10baseT_Full |
237 ADVERTISED_100baseT_Half |
238 ADVERTISED_100baseT_Full |
239 ADVERTISED_1000baseT_Full |
241 ADVERTISED_Asym_Pause |
244 priv->phydev->autoneg = AUTONEG_ENABLE;
246 ret = genphy_config_aneg(priv->phydev);
248 printf("genphy_config_aneg failed\n");
251 ret = phy_startup(priv->phydev);
253 printf("phy_startup failed\n");
257 debug("** %s() speed %i duplex %i adv %X supp %X\n", __func__,
258 priv->phydev->speed, priv->phydev->duplex,
259 priv->phydev->advertising, priv->phydev->supported);
264 int lan7x_update_flowcontrol(struct usb_device *udev,
265 struct ueth_data *dev,
266 uint32_t *flow, uint32_t *fct_flow)
268 uint32_t lcladv, rmtadv;
270 struct lan7x_private *priv = dev_get_priv(udev->dev);
272 debug("** %s()\n", __func__);
273 debug("** %s() priv->phydev->speed %i duplex %i\n", __func__,
274 priv->phydev->speed, priv->phydev->duplex);
276 if (priv->phydev->duplex == DUPLEX_FULL) {
277 lcladv = lan7x_mdio_read(udev, dev->phy_id, MII_ADVERTISE);
278 rmtadv = lan7x_mdio_read(udev, dev->phy_id, MII_LPA);
279 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
282 if (cap & FLOW_CTRL_TX) {
283 *flow = (FLOW_CR_TX_FCEN | 0xFFFF);
284 /* set fct_flow thresholds to 20% and 80% */
285 *fct_flow = ((MAX_RX_FIFO_SIZE * 2) / (10 * 512))
288 *fct_flow |= ((MAX_RX_FIFO_SIZE * 8) / (10 * 512))
295 if (cap & FLOW_CTRL_RX) {
296 *flow |= FLOW_CR_RX_FCEN;
306 int lan7x_read_eeprom_mac(unsigned char *enetaddr, struct usb_device *udev)
310 memset(enetaddr, 0, 6);
312 ret = lan7x_read_eeprom(udev, 0, 1, enetaddr);
314 if ((ret == 0) && (enetaddr[0] == EEPROM_INDICATOR)) {
315 ret = lan7x_read_eeprom(udev,
316 EEPROM_MAC_OFFSET, ETH_ALEN,
318 if ((ret == 0) && is_valid_ethaddr(enetaddr)) {
319 /* eeprom values are valid so use them */
320 debug("MAC address read from EEPROM %pM\n",
325 debug("MAC address read from EEPROM invalid %pM\n", enetaddr);
327 memset(enetaddr, 0, 6);
331 int lan7x_pmt_phy_reset(struct usb_device *udev,
332 struct ueth_data *dev)
337 ret = lan7x_read_reg(udev, PMT_CTL, &data);
340 ret = lan7x_write_reg(udev, PMT_CTL, data | PMT_CTL_PHY_RST);
344 /* for LAN7x, we need to check PMT_CTL_READY asserted */
345 ret = lan7x_wait_for_bit(udev, "PMT_CTL_PHY_RST",
346 PMT_CTL, PMT_CTL_PHY_RST,
347 false, 1000, 0); /* could take over 125mS */
351 return lan7x_wait_for_bit(udev, "PMT_CTL_READY",
352 PMT_CTL, PMT_CTL_READY,
356 int lan7x_basic_reset(struct usb_device *udev,
357 struct ueth_data *dev)
361 dev->phy_id = LAN7X_INTERNAL_PHY_ID; /* fixed phy id */
363 ret = lan7x_write_reg(udev, HW_CFG, HW_CFG_LRST);
367 ret = lan7x_wait_for_bit(udev, "HW_CFG_LRST",
373 debug("USB devnum %d portnr %d\n", udev->devnum, udev->portnr);
375 return lan7x_pmt_phy_reset(udev, dev);
378 void lan7x_eth_stop(struct udevice *dev)
380 debug("** %s()\n", __func__);
383 int lan7x_eth_send(struct udevice *dev, void *packet, int length)
385 struct lan7x_private *priv = dev_get_priv(dev);
386 struct ueth_data *ueth = &priv->ueth;
391 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, msg,
392 PKTSIZE + sizeof(tx_cmd_a) + sizeof(tx_cmd_b));
394 debug("** %s(), len %d, buf %#x\n", __func__, length,
395 (unsigned int)(ulong) msg);
396 if (length > PKTSIZE)
399 /* LAN7x disable all TX offload features for u-boot */
400 tx_cmd_a = (u32) (length & TX_CMD_A_LEN_MASK) | TX_CMD_A_FCS;
402 cpu_to_le32s(&tx_cmd_a);
403 cpu_to_le32s(&tx_cmd_b);
405 /* prepend cmd_a and cmd_b */
406 memcpy(msg, &tx_cmd_a, sizeof(tx_cmd_a));
407 memcpy(msg + sizeof(tx_cmd_a), &tx_cmd_b, sizeof(tx_cmd_b));
408 memcpy(msg + sizeof(tx_cmd_a) + sizeof(tx_cmd_b), (void *)packet,
410 err = usb_bulk_msg(ueth->pusb_dev,
411 usb_sndbulkpipe(ueth->pusb_dev, ueth->ep_out),
413 length + sizeof(tx_cmd_a) +
415 &actual_len, USB_BULK_SEND_TIMEOUT_MS);
416 debug("Tx: len = %u, actual = %u, err = %d\n",
417 (unsigned int)(length + sizeof(tx_cmd_a) + sizeof(tx_cmd_b)),
418 (unsigned int)actual_len, err);
423 int lan7x_eth_recv(struct udevice *dev, int flags, uchar **packetp)
425 struct lan7x_private *priv = dev_get_priv(dev);
426 struct ueth_data *ueth = &priv->ueth;
432 len = usb_ether_get_rx_bytes(ueth, &ptr);
433 debug("%s: first try, len=%d\n", __func__, len);
435 if (!(flags & ETH_RECV_CHECK_DEVICE))
437 ret = usb_ether_receive(ueth, RX_URB_SIZE);
441 len = usb_ether_get_rx_bytes(ueth, &ptr);
442 debug("%s: second try, len=%d\n", __func__, len);
446 * 1st 4 bytes contain the length of the actual data plus error info.
447 * Extract data length.
449 if (len < sizeof(packet_len)) {
450 debug("Rx: incomplete packet length\n");
453 memcpy(&rx_cmd_a, ptr, sizeof(rx_cmd_a));
454 le32_to_cpus(&rx_cmd_a);
455 if (rx_cmd_a & RX_CMD_A_RXE) {
456 debug("Rx: Error header=%#x", rx_cmd_a);
459 packet_len = (u16) (rx_cmd_a & RX_CMD_A_LEN_MASK);
461 if (packet_len > len - sizeof(packet_len)) {
462 debug("Rx: too large packet: %d\n", packet_len);
467 * For LAN7x, the length in command A does not
468 * include command A, B, and C length.
476 usb_ether_advance_rxbuf(ueth, -1);
480 int lan7x_free_pkt(struct udevice *dev, uchar *packet, int packet_len)
482 struct lan7x_private *priv = dev_get_priv(dev);
484 packet_len = ALIGN(packet_len, 4);
485 usb_ether_advance_rxbuf(&priv->ueth, sizeof(u32) + packet_len);
490 int lan7x_eth_remove(struct udevice *dev)
492 struct lan7x_private *priv = dev_get_priv(dev);
494 debug("** %s()\n", __func__);
496 mdio_unregister(priv->mdiobus);
497 mdio_free(priv->mdiobus);