1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
11 #include <linux/ethtool.h>
12 #include <linux/mii.h>
13 #include "usb_ether.h"
17 * Lan7x infrastructure commands
19 int lan7x_write_reg(struct usb_device *udev, u32 index, u32 data)
22 ALLOC_CACHE_ALIGN_BUFFER(u32, tmpbuf, 1);
27 len = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
28 USB_VENDOR_REQUEST_WRITE_REGISTER,
29 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
30 0, index, tmpbuf, sizeof(data),
31 USB_CTRL_SET_TIMEOUT_MS);
32 if (len != sizeof(data)) {
33 debug("%s failed: index=%d, data=%d, len=%d",
34 __func__, index, data, len);
40 int lan7x_read_reg(struct usb_device *udev, u32 index, u32 *data)
43 ALLOC_CACHE_ALIGN_BUFFER(u32, tmpbuf, 1);
45 len = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
46 USB_VENDOR_REQUEST_READ_REGISTER,
47 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
48 0, index, tmpbuf, sizeof(*data),
49 USB_CTRL_GET_TIMEOUT_MS);
51 if (len != sizeof(*data)) {
52 debug("%s failed: index=%d, len=%d", __func__, index, len);
60 static int lan7x_phy_wait_not_busy(struct usb_device *udev)
62 return lan7x_wait_for_bit(udev, __func__,
63 MII_ACC, MII_ACC_MII_BUSY,
67 int lan7x_mdio_read(struct usb_device *udev, int phy_id, int idx)
71 /* confirm MII not busy */
72 if (lan7x_phy_wait_not_busy(udev)) {
73 debug("MII is busy in %s\n", __func__);
77 /* set the address, index & direction (read from PHY) */
78 addr = (phy_id << 11) | (idx << 6) |
79 MII_ACC_MII_READ | MII_ACC_MII_BUSY;
80 lan7x_write_reg(udev, MII_ACC, addr);
82 if (lan7x_phy_wait_not_busy(udev)) {
83 debug("Timed out reading MII reg %02X\n", idx);
87 lan7x_read_reg(udev, MII_DATA, &val);
92 void lan7x_mdio_write(struct usb_device *udev, int phy_id, int idx, int regval)
96 /* confirm MII not busy */
97 if (lan7x_phy_wait_not_busy(udev)) {
98 debug("MII is busy in %s\n", __func__);
102 lan7x_write_reg(udev, MII_DATA, regval);
104 /* set the address, index & direction (write to PHY) */
105 addr = (phy_id << 11) | (idx << 6) |
106 MII_ACC_MII_WRITE | MII_ACC_MII_BUSY;
107 lan7x_write_reg(udev, MII_ACC, addr);
109 if (lan7x_phy_wait_not_busy(udev))
110 debug("Timed out writing MII reg %02X\n", idx);
114 * Lan7x phylib wrappers
116 static int lan7x_phylib_mdio_read(struct mii_dev *bus,
117 int addr, int devad, int reg)
119 struct usb_device *udev = dev_get_parent_priv(bus->priv);
121 return lan7x_mdio_read(udev, addr, reg);
124 static int lan7x_phylib_mdio_write(struct mii_dev *bus,
125 int addr, int devad, int reg, u16 val)
127 struct usb_device *udev = dev_get_parent_priv(bus->priv);
129 lan7x_mdio_write(udev, addr, reg, (int)val);
135 * Lan7x eeprom functions
137 static int lan7x_eeprom_confirm_not_busy(struct usb_device *udev)
139 return lan7x_wait_for_bit(udev, __func__,
140 E2P_CMD, E2P_CMD_EPC_BUSY,
144 static int lan7x_wait_eeprom(struct usb_device *udev)
146 return lan7x_wait_for_bit(udev, __func__,
148 (E2P_CMD_EPC_BUSY | E2P_CMD_EPC_TIMEOUT),
152 static int lan7x_read_eeprom(struct usb_device *udev,
153 u32 offset, u32 length, u8 *data)
158 ret = lan7x_eeprom_confirm_not_busy(udev);
162 for (i = 0; i < length; i++) {
163 val = E2P_CMD_EPC_BUSY | E2P_CMD_EPC_CMD_READ |
164 (offset & E2P_CMD_EPC_ADDR_MASK);
165 lan7x_write_reg(udev, E2P_CMD, val);
167 ret = lan7x_wait_eeprom(udev);
171 lan7x_read_reg(udev, E2P_DATA, &val);
172 data[i] = val & 0xFF;
179 * Lan7x phylib functions
181 int lan7x_phylib_register(struct udevice *udev)
183 struct usb_device *usbdev = dev_get_parent_priv(udev);
184 struct lan7x_private *priv = dev_get_priv(udev);
187 priv->mdiobus = mdio_alloc();
188 if (!priv->mdiobus) {
189 printf("mdio_alloc failed\n");
192 priv->mdiobus->read = lan7x_phylib_mdio_read;
193 priv->mdiobus->write = lan7x_phylib_mdio_write;
194 sprintf(priv->mdiobus->name,
195 "lan7x_mdiobus-d%hu-p%hu", usbdev->devnum, usbdev->portnr);
196 priv->mdiobus->priv = (void *)udev;
198 ret = mdio_register(priv->mdiobus);
200 printf("mdio_register failed\n");
208 int lan7x_eth_phylib_connect(struct udevice *udev, struct ueth_data *dev)
210 struct lan7x_private *priv = dev_get_priv(udev);
212 priv->phydev = phy_connect(priv->mdiobus, dev->phy_id,
213 udev, PHY_INTERFACE_MODE_MII);
216 printf("phy_connect failed\n");
222 int lan7x_eth_phylib_config_start(struct udevice *udev)
224 struct lan7x_private *priv = dev_get_priv(udev);
227 /* configure supported modes */
228 priv->phydev->supported = PHY_BASIC_FEATURES |
229 SUPPORTED_1000baseT_Full |
231 SUPPORTED_Asym_Pause;
233 priv->phydev->advertising = ADVERTISED_10baseT_Half |
234 ADVERTISED_10baseT_Full |
235 ADVERTISED_100baseT_Half |
236 ADVERTISED_100baseT_Full |
237 ADVERTISED_1000baseT_Full |
239 ADVERTISED_Asym_Pause |
242 priv->phydev->autoneg = AUTONEG_ENABLE;
244 ret = genphy_config_aneg(priv->phydev);
246 printf("genphy_config_aneg failed\n");
249 ret = phy_startup(priv->phydev);
251 printf("phy_startup failed\n");
255 debug("** %s() speed %i duplex %i adv %X supp %X\n", __func__,
256 priv->phydev->speed, priv->phydev->duplex,
257 priv->phydev->advertising, priv->phydev->supported);
262 int lan7x_update_flowcontrol(struct usb_device *udev,
263 struct ueth_data *dev,
264 uint32_t *flow, uint32_t *fct_flow)
266 uint32_t lcladv, rmtadv;
268 struct lan7x_private *priv = dev_get_priv(udev->dev);
270 debug("** %s()\n", __func__);
271 debug("** %s() priv->phydev->speed %i duplex %i\n", __func__,
272 priv->phydev->speed, priv->phydev->duplex);
274 if (priv->phydev->duplex == DUPLEX_FULL) {
275 lcladv = lan7x_mdio_read(udev, dev->phy_id, MII_ADVERTISE);
276 rmtadv = lan7x_mdio_read(udev, dev->phy_id, MII_LPA);
277 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
280 if (cap & FLOW_CTRL_TX) {
281 *flow = (FLOW_CR_TX_FCEN | 0xFFFF);
282 /* set fct_flow thresholds to 20% and 80% */
283 *fct_flow = ((MAX_RX_FIFO_SIZE * 2) / (10 * 512))
286 *fct_flow |= ((MAX_RX_FIFO_SIZE * 8) / (10 * 512))
293 if (cap & FLOW_CTRL_RX) {
294 *flow |= FLOW_CR_RX_FCEN;
304 int lan7x_read_eeprom_mac(unsigned char *enetaddr, struct usb_device *udev)
308 memset(enetaddr, 0, 6);
310 ret = lan7x_read_eeprom(udev, 0, 1, enetaddr);
312 if ((ret == 0) && (enetaddr[0] == EEPROM_INDICATOR)) {
313 ret = lan7x_read_eeprom(udev,
314 EEPROM_MAC_OFFSET, ETH_ALEN,
316 if ((ret == 0) && is_valid_ethaddr(enetaddr)) {
317 /* eeprom values are valid so use them */
318 debug("MAC address read from EEPROM %pM\n",
323 debug("MAC address read from EEPROM invalid %pM\n", enetaddr);
325 memset(enetaddr, 0, 6);
329 int lan7x_pmt_phy_reset(struct usb_device *udev,
330 struct ueth_data *dev)
335 ret = lan7x_read_reg(udev, PMT_CTL, &data);
338 ret = lan7x_write_reg(udev, PMT_CTL, data | PMT_CTL_PHY_RST);
342 /* for LAN7x, we need to check PMT_CTL_READY asserted */
343 ret = lan7x_wait_for_bit(udev, "PMT_CTL_PHY_RST",
344 PMT_CTL, PMT_CTL_PHY_RST,
345 false, 1000, 0); /* could take over 125mS */
349 return lan7x_wait_for_bit(udev, "PMT_CTL_READY",
350 PMT_CTL, PMT_CTL_READY,
354 int lan7x_basic_reset(struct usb_device *udev,
355 struct ueth_data *dev)
359 dev->phy_id = LAN7X_INTERNAL_PHY_ID; /* fixed phy id */
361 ret = lan7x_write_reg(udev, HW_CFG, HW_CFG_LRST);
365 ret = lan7x_wait_for_bit(udev, "HW_CFG_LRST",
371 debug("USB devnum %d portnr %d\n", udev->devnum, udev->portnr);
373 return lan7x_pmt_phy_reset(udev, dev);
376 void lan7x_eth_stop(struct udevice *dev)
378 debug("** %s()\n", __func__);
381 int lan7x_eth_send(struct udevice *dev, void *packet, int length)
383 struct lan7x_private *priv = dev_get_priv(dev);
384 struct ueth_data *ueth = &priv->ueth;
389 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, msg,
390 PKTSIZE + sizeof(tx_cmd_a) + sizeof(tx_cmd_b));
392 debug("** %s(), len %d, buf %#x\n", __func__, length,
393 (unsigned int)(ulong) msg);
394 if (length > PKTSIZE)
397 /* LAN7x disable all TX offload features for u-boot */
398 tx_cmd_a = (u32) (length & TX_CMD_A_LEN_MASK) | TX_CMD_A_FCS;
400 cpu_to_le32s(&tx_cmd_a);
401 cpu_to_le32s(&tx_cmd_b);
403 /* prepend cmd_a and cmd_b */
404 memcpy(msg, &tx_cmd_a, sizeof(tx_cmd_a));
405 memcpy(msg + sizeof(tx_cmd_a), &tx_cmd_b, sizeof(tx_cmd_b));
406 memcpy(msg + sizeof(tx_cmd_a) + sizeof(tx_cmd_b), (void *)packet,
408 err = usb_bulk_msg(ueth->pusb_dev,
409 usb_sndbulkpipe(ueth->pusb_dev, ueth->ep_out),
411 length + sizeof(tx_cmd_a) +
413 &actual_len, USB_BULK_SEND_TIMEOUT_MS);
414 debug("Tx: len = %u, actual = %u, err = %d\n",
415 (unsigned int)(length + sizeof(tx_cmd_a) + sizeof(tx_cmd_b)),
416 (unsigned int)actual_len, err);
421 int lan7x_eth_recv(struct udevice *dev, int flags, uchar **packetp)
423 struct lan7x_private *priv = dev_get_priv(dev);
424 struct ueth_data *ueth = &priv->ueth;
430 len = usb_ether_get_rx_bytes(ueth, &ptr);
431 debug("%s: first try, len=%d\n", __func__, len);
433 if (!(flags & ETH_RECV_CHECK_DEVICE))
435 ret = usb_ether_receive(ueth, RX_URB_SIZE);
439 len = usb_ether_get_rx_bytes(ueth, &ptr);
440 debug("%s: second try, len=%d\n", __func__, len);
444 * 1st 4 bytes contain the length of the actual data plus error info.
445 * Extract data length.
447 if (len < sizeof(packet_len)) {
448 debug("Rx: incomplete packet length\n");
451 memcpy(&rx_cmd_a, ptr, sizeof(rx_cmd_a));
452 le32_to_cpus(&rx_cmd_a);
453 if (rx_cmd_a & RX_CMD_A_RXE) {
454 debug("Rx: Error header=%#x", rx_cmd_a);
457 packet_len = (u16) (rx_cmd_a & RX_CMD_A_LEN_MASK);
459 if (packet_len > len - sizeof(packet_len)) {
460 debug("Rx: too large packet: %d\n", packet_len);
465 * For LAN7x, the length in command A does not
466 * include command A, B, and C length.
474 usb_ether_advance_rxbuf(ueth, -1);
478 int lan7x_free_pkt(struct udevice *dev, uchar *packet, int packet_len)
480 struct lan7x_private *priv = dev_get_priv(dev);
482 packet_len = ALIGN(packet_len, 4);
483 usb_ether_advance_rxbuf(&priv->ueth, sizeof(u32) + packet_len);
488 int lan7x_eth_remove(struct udevice *dev)
490 struct lan7x_private *priv = dev_get_priv(dev);
492 debug("** %s()\n", __func__);
494 mdio_unregister(priv->mdiobus);
495 mdio_free(priv->mdiobus);