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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2017 Microchip Technology Inc. All rights reserved. */ #include <dm.h> #include <log.h> #include <usb.h> #include <linux/bitops.h> #include <linux/mii.h> #include "usb_ether.h" #include "lan7x.h" /* LAN75xx specific register/bit defines */ #define LAN75XX_HW_CFG_BIR BIT(7) #define LAN75XX_BURST_CAP 0x034 #define LAN75XX_BULK_IN_DLY 0x03C #define LAN75XX_RFE_CTL 0x060 #define LAN75XX_FCT_RX_CTL 0x090 #define LAN75XX_FCT_TX_CTL 0x094 #define LAN75XX_FCT_RX_FIFO_END 0x098 #define LAN75XX_FCT_TX_FIFO_END 0x09C #define LAN75XX_FCT_FLOW 0x0A0 /* MAC ADDRESS PERFECT FILTER For LAN75xx */ #define LAN75XX_ADDR_FILTX 0x300 #define LAN75XX_ADDR_FILTX_FB_VALID BIT(31) /* * Lan75xx infrastructure commands */ static int lan75xx_phy_gig_workaround(struct usb_device *udev, struct ueth_data *dev) { int ret = 0; /* Only internal phy */ /* Set the phy in Gig loopback */ lan7x_mdio_write(udev, dev->phy_id, MII_BMCR, (BMCR_LOOPBACK | BMCR_SPEED1000)); /* Wait for the link up */ ret = lan7x_mdio_wait_for_bit(udev, "BMSR_LSTATUS", dev->phy_id, MII_BMSR, BMSR_LSTATUS, true, PHY_CONNECT_TIMEOUT_MS, 1); if (ret) return ret; /* phy reset */ return lan7x_pmt_phy_reset(udev, dev); } static int lan75xx_update_flowcontrol(struct usb_device *udev, struct ueth_data *dev) { uint32_t flow = 0, fct_flow = 0; int ret; ret = lan7x_update_flowcontrol(udev, dev, &flow, &fct_flow); if (ret) return ret; ret = lan7x_write_reg(udev, LAN75XX_FCT_FLOW, fct_flow); if (ret) return ret; return lan7x_write_reg(udev, FLOW, flow); } static int lan75xx_set_receive_filter(struct usb_device *udev) { /* No multicast in u-boot */ return lan7x_write_reg(udev, LAN75XX_RFE_CTL, RFE_CTL_BCAST_EN | RFE_CTL_DA_PERFECT); } /* starts the TX path */ static void lan75xx_start_tx_path(struct usb_device *udev) { /* Enable Tx at MAC */ lan7x_write_reg(udev, MAC_TX, MAC_TX_TXEN); /* Enable Tx at SCSRs */ lan7x_write_reg(udev, LAN75XX_FCT_TX_CTL, FCT_TX_CTL_EN); } /* Starts the Receive path */ static void lan75xx_start_rx_path(struct usb_device *udev) { /* Enable Rx at MAC */ lan7x_write_reg(udev, MAC_RX, LAN7X_MAC_RX_MAX_SIZE_DEFAULT | MAC_RX_FCS_STRIP | MAC_RX_RXEN); /* Enable Rx at SCSRs */ lan7x_write_reg(udev, LAN75XX_FCT_RX_CTL, FCT_RX_CTL_EN); } static int lan75xx_basic_reset(struct usb_device *udev, struct ueth_data *dev, struct lan7x_private *priv) { int ret; u32 val; ret = lan7x_basic_reset(udev, dev); if (ret) return ret; /* Keep the chip ID */ ret = lan7x_read_reg(udev, ID_REV, &val); if (ret) return ret; debug("LAN75xx ID_REV = 0x%08x\n", val); priv->chipid = (val & ID_REV_CHIP_ID_MASK) >> 16; /* Respond to the IN token with a NAK */ ret = lan7x_read_reg(udev, HW_CFG, &val); if (ret) return ret; val |= LAN75XX_HW_CFG_BIR; return lan7x_write_reg(udev, HW_CFG, val); } int lan75xx_write_hwaddr(struct udevice *dev) { struct usb_device *udev = dev_get_parent_priv(dev); struct eth_pdata *pdata = dev_get_plat(dev); unsigned char *enetaddr = pdata->enetaddr; u32 addr_lo = get_unaligned_le32(&enetaddr[0]); u32 addr_hi = (u32)get_unaligned_le16(&enetaddr[4]); int ret; /* set hardware address */ ret = lan7x_write_reg(udev, RX_ADDRL, addr_lo); if (ret) return ret; ret = lan7x_write_reg(udev, RX_ADDRH, addr_hi); if (ret) return ret; ret = lan7x_write_reg(udev, LAN75XX_ADDR_FILTX + 4, addr_lo); if (ret) return ret; addr_hi |= LAN75XX_ADDR_FILTX_FB_VALID; ret = lan7x_write_reg(udev, LAN75XX_ADDR_FILTX, addr_hi); if (ret) return ret; debug("MAC addr %pM written\n", enetaddr); return 0; } static int lan75xx_eth_start(struct udevice *dev) { struct usb_device *udev = dev_get_parent_priv(dev); struct lan7x_private *priv = dev_get_priv(dev); struct ueth_data *ueth = &priv->ueth; int ret; u32 write_buf; /* Reset and read Mac addr were done in probe() */ ret = lan75xx_write_hwaddr(dev); if (ret) return ret; ret = lan7x_write_reg(udev, INT_STS, 0xFFFFFFFF); if (ret) return ret; ret = lan7x_write_reg(udev, LAN75XX_BURST_CAP, 0); if (ret) return ret; ret = lan7x_write_reg(udev, LAN75XX_BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); if (ret) return ret; /* set FIFO sizes */ write_buf = (MAX_RX_FIFO_SIZE - 512) / 512; ret = lan7x_write_reg(udev, LAN75XX_FCT_RX_FIFO_END, write_buf); if (ret) return ret; write_buf = (MAX_TX_FIFO_SIZE - 512) / 512; ret = lan7x_write_reg(udev, LAN75XX_FCT_TX_FIFO_END, write_buf); if (ret) return ret; /* Init Tx */ ret = lan7x_write_reg(udev, FLOW, 0); if (ret) return ret; /* Init Rx. Set Vlan, keep default for VLAN on 75xx */ ret = lan75xx_set_receive_filter(udev); if (ret) return ret; /* phy workaround for gig link */ ret = lan75xx_phy_gig_workaround(udev, ueth); if (ret) return ret; /* Init PHY, autonego, and link */ ret = lan7x_eth_phylib_connect(dev, &priv->ueth); if (ret) return ret; ret = lan7x_eth_phylib_config_start(dev); if (ret) return ret; /* * MAC_CR has to be set after PHY init. * MAC will auto detect the PHY speed. */ ret = lan7x_read_reg(udev, MAC_CR, &write_buf); if (ret) return ret; write_buf |= MAC_CR_AUTO_DUPLEX | MAC_CR_AUTO_SPEED | MAC_CR_ADP; ret = lan7x_write_reg(udev, MAC_CR, write_buf); if (ret) return ret; lan75xx_start_tx_path(udev); lan75xx_start_rx_path(udev); return lan75xx_update_flowcontrol(udev, ueth); } int lan75xx_read_rom_hwaddr(struct udevice *dev) { struct usb_device *udev = dev_get_parent_priv(dev); struct eth_pdata *pdata = dev_get_plat(dev); int ret; /* * Refer to the doc/README.enetaddr and doc/README.usb for * the U-Boot MAC address policy */ ret = lan7x_read_eeprom_mac(pdata->enetaddr, udev); if (ret) memset(pdata->enetaddr, 0, 6); return 0; } static int lan75xx_eth_probe(struct udevice *dev) { struct usb_device *udev = dev_get_parent_priv(dev); struct lan7x_private *priv = dev_get_priv(dev); struct ueth_data *ueth = &priv->ueth; struct eth_pdata *pdata = dev_get_plat(dev); int ret; /* Do a reset in order to get the MAC address from HW */ if (lan75xx_basic_reset(udev, ueth, priv)) return 0; /* Get the MAC address */ /* * We must set the eth->enetaddr from HW because the upper layer * will force to use the environmental var (usbethaddr) or random if * there is no valid MAC address in eth->enetaddr. * * Refer to the doc/README.enetaddr and doc/README.usb for * the U-Boot MAC address policy */ lan7x_read_eeprom_mac(pdata->enetaddr, udev); /* Do not return 0 for not finding MAC addr in HW */ ret = usb_ether_register(dev, ueth, RX_URB_SIZE); if (ret) return ret; /* Register phylib */ return lan7x_phylib_register(dev); } static const struct eth_ops lan75xx_eth_ops = { .start = lan75xx_eth_start, .send = lan7x_eth_send, .recv = lan7x_eth_recv, .free_pkt = lan7x_free_pkt, .stop = lan7x_eth_stop, .write_hwaddr = lan75xx_write_hwaddr, .read_rom_hwaddr = lan75xx_read_rom_hwaddr, }; U_BOOT_DRIVER(lan75xx_eth) = { .name = "lan75xx_eth", .id = UCLASS_ETH, .probe = lan75xx_eth_probe, .remove = lan7x_eth_remove, .ops = &lan75xx_eth_ops, .priv_auto = sizeof(struct lan7x_private), .plat_auto = sizeof(struct eth_pdata), }; static const struct usb_device_id lan75xx_eth_id_table[] = { { USB_DEVICE(0x0424, 0x7500) }, /* LAN7500 USB Ethernet */ { } /* Terminating entry */ }; U_BOOT_USB_DEVICE(lan75xx_eth, lan75xx_eth_id_table); |