1 /* 2 * Copyright (C) 2011 Michal Simek <monstr@monstr.eu> 3 * Copyright (C) 2011 PetaLogix 4 * Copyright (C) 2010 Xilinx, Inc. All rights reserved. 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <config.h> 10 #include <common.h> 11 #include <dm.h> 12 #include <net.h> 13 #include <malloc.h> 14 #include <asm/io.h> 15 #include <phy.h> 16 #include <miiphy.h> 17 18 DECLARE_GLOBAL_DATA_PTR; 19 20 /* Link setup */ 21 #define XAE_EMMC_LINKSPEED_MASK 0xC0000000 /* Link speed */ 22 #define XAE_EMMC_LINKSPD_10 0x00000000 /* Link Speed mask for 10 Mbit */ 23 #define XAE_EMMC_LINKSPD_100 0x40000000 /* Link Speed mask for 100 Mbit */ 24 #define XAE_EMMC_LINKSPD_1000 0x80000000 /* Link Speed mask for 1000 Mbit */ 25 26 /* Interrupt Status/Enable/Mask Registers bit definitions */ 27 #define XAE_INT_RXRJECT_MASK 0x00000008 /* Rx frame rejected */ 28 #define XAE_INT_MGTRDY_MASK 0x00000080 /* MGT clock Lock */ 29 30 /* Receive Configuration Word 1 (RCW1) Register bit definitions */ 31 #define XAE_RCW1_RX_MASK 0x10000000 /* Receiver enable */ 32 33 /* Transmitter Configuration (TC) Register bit definitions */ 34 #define XAE_TC_TX_MASK 0x10000000 /* Transmitter enable */ 35 36 #define XAE_UAW1_UNICASTADDR_MASK 0x0000FFFF 37 38 /* MDIO Management Configuration (MC) Register bit definitions */ 39 #define XAE_MDIO_MC_MDIOEN_MASK 0x00000040 /* MII management enable*/ 40 41 /* MDIO Management Control Register (MCR) Register bit definitions */ 42 #define XAE_MDIO_MCR_PHYAD_MASK 0x1F000000 /* Phy Address Mask */ 43 #define XAE_MDIO_MCR_PHYAD_SHIFT 24 /* Phy Address Shift */ 44 #define XAE_MDIO_MCR_REGAD_MASK 0x001F0000 /* Reg Address Mask */ 45 #define XAE_MDIO_MCR_REGAD_SHIFT 16 /* Reg Address Shift */ 46 #define XAE_MDIO_MCR_OP_READ_MASK 0x00008000 /* Op Code Read Mask */ 47 #define XAE_MDIO_MCR_OP_WRITE_MASK 0x00004000 /* Op Code Write Mask */ 48 #define XAE_MDIO_MCR_INITIATE_MASK 0x00000800 /* Ready Mask */ 49 #define XAE_MDIO_MCR_READY_MASK 0x00000080 /* Ready Mask */ 50 51 #define XAE_MDIO_DIV_DFT 29 /* Default MDIO clock divisor */ 52 53 /* DMA macros */ 54 /* Bitmasks of XAXIDMA_CR_OFFSET register */ 55 #define XAXIDMA_CR_RUNSTOP_MASK 0x00000001 /* Start/stop DMA channel */ 56 #define XAXIDMA_CR_RESET_MASK 0x00000004 /* Reset DMA engine */ 57 58 /* Bitmasks of XAXIDMA_SR_OFFSET register */ 59 #define XAXIDMA_HALTED_MASK 0x00000001 /* DMA channel halted */ 60 61 /* Bitmask for interrupts */ 62 #define XAXIDMA_IRQ_IOC_MASK 0x00001000 /* Completion intr */ 63 #define XAXIDMA_IRQ_DELAY_MASK 0x00002000 /* Delay interrupt */ 64 #define XAXIDMA_IRQ_ALL_MASK 0x00007000 /* All interrupts */ 65 66 /* Bitmasks of XAXIDMA_BD_CTRL_OFFSET register */ 67 #define XAXIDMA_BD_CTRL_TXSOF_MASK 0x08000000 /* First tx packet */ 68 #define XAXIDMA_BD_CTRL_TXEOF_MASK 0x04000000 /* Last tx packet */ 69 70 #define DMAALIGN 128 71 72 static u8 rxframe[PKTSIZE_ALIGN] __attribute((aligned(DMAALIGN))); 73 74 /* Reflect dma offsets */ 75 struct axidma_reg { 76 u32 control; /* DMACR */ 77 u32 status; /* DMASR */ 78 u32 current; /* CURDESC */ 79 u32 reserved; 80 u32 tail; /* TAILDESC */ 81 }; 82 83 /* Private driver structures */ 84 struct axidma_priv { 85 struct axidma_reg *dmatx; 86 struct axidma_reg *dmarx; 87 int phyaddr; 88 struct axi_regs *iobase; 89 phy_interface_t interface; 90 struct phy_device *phydev; 91 struct mii_dev *bus; 92 }; 93 94 /* BD descriptors */ 95 struct axidma_bd { 96 u32 next; /* Next descriptor pointer */ 97 u32 reserved1; 98 u32 phys; /* Buffer address */ 99 u32 reserved2; 100 u32 reserved3; 101 u32 reserved4; 102 u32 cntrl; /* Control */ 103 u32 status; /* Status */ 104 u32 app0; 105 u32 app1; /* TX start << 16 | insert */ 106 u32 app2; /* TX csum seed */ 107 u32 app3; 108 u32 app4; 109 u32 sw_id_offset; 110 u32 reserved5; 111 u32 reserved6; 112 }; 113 114 /* Static BDs - driver uses only one BD */ 115 static struct axidma_bd tx_bd __attribute((aligned(DMAALIGN))); 116 static struct axidma_bd rx_bd __attribute((aligned(DMAALIGN))); 117 118 struct axi_regs { 119 u32 reserved[3]; 120 u32 is; /* 0xC: Interrupt status */ 121 u32 reserved2; 122 u32 ie; /* 0x14: Interrupt enable */ 123 u32 reserved3[251]; 124 u32 rcw1; /* 0x404: Rx Configuration Word 1 */ 125 u32 tc; /* 0x408: Tx Configuration */ 126 u32 reserved4; 127 u32 emmc; /* 0x410: EMAC mode configuration */ 128 u32 reserved5[59]; 129 u32 mdio_mc; /* 0x500: MII Management Config */ 130 u32 mdio_mcr; /* 0x504: MII Management Control */ 131 u32 mdio_mwd; /* 0x508: MII Management Write Data */ 132 u32 mdio_mrd; /* 0x50C: MII Management Read Data */ 133 u32 reserved6[124]; 134 u32 uaw0; /* 0x700: Unicast address word 0 */ 135 u32 uaw1; /* 0x704: Unicast address word 1 */ 136 }; 137 138 /* Use MII register 1 (MII status register) to detect PHY */ 139 #define PHY_DETECT_REG 1 140 141 /* 142 * Mask used to verify certain PHY features (or register contents) 143 * in the register above: 144 * 0x1000: 10Mbps full duplex support 145 * 0x0800: 10Mbps half duplex support 146 * 0x0008: Auto-negotiation support 147 */ 148 #define PHY_DETECT_MASK 0x1808 149 150 static inline int mdio_wait(struct axi_regs *regs) 151 { 152 u32 timeout = 200; 153 154 /* Wait till MDIO interface is ready to accept a new transaction. */ 155 while (timeout && (!(in_be32(®s->mdio_mcr) 156 & XAE_MDIO_MCR_READY_MASK))) { 157 timeout--; 158 udelay(1); 159 } 160 if (!timeout) { 161 printf("%s: Timeout\n", __func__); 162 return 1; 163 } 164 return 0; 165 } 166 167 static u32 phyread(struct axidma_priv *priv, u32 phyaddress, u32 registernum, 168 u16 *val) 169 { 170 struct axi_regs *regs = priv->iobase; 171 u32 mdioctrlreg = 0; 172 173 if (mdio_wait(regs)) 174 return 1; 175 176 mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) & 177 XAE_MDIO_MCR_PHYAD_MASK) | 178 ((registernum << XAE_MDIO_MCR_REGAD_SHIFT) 179 & XAE_MDIO_MCR_REGAD_MASK) | 180 XAE_MDIO_MCR_INITIATE_MASK | 181 XAE_MDIO_MCR_OP_READ_MASK; 182 183 out_be32(®s->mdio_mcr, mdioctrlreg); 184 185 if (mdio_wait(regs)) 186 return 1; 187 188 /* Read data */ 189 *val = in_be32(®s->mdio_mrd); 190 return 0; 191 } 192 193 static u32 phywrite(struct axidma_priv *priv, u32 phyaddress, u32 registernum, 194 u32 data) 195 { 196 struct axi_regs *regs = priv->iobase; 197 u32 mdioctrlreg = 0; 198 199 if (mdio_wait(regs)) 200 return 1; 201 202 mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) & 203 XAE_MDIO_MCR_PHYAD_MASK) | 204 ((registernum << XAE_MDIO_MCR_REGAD_SHIFT) 205 & XAE_MDIO_MCR_REGAD_MASK) | 206 XAE_MDIO_MCR_INITIATE_MASK | 207 XAE_MDIO_MCR_OP_WRITE_MASK; 208 209 /* Write data */ 210 out_be32(®s->mdio_mwd, data); 211 212 out_be32(®s->mdio_mcr, mdioctrlreg); 213 214 if (mdio_wait(regs)) 215 return 1; 216 217 return 0; 218 } 219 220 static int axiemac_phy_init(struct udevice *dev) 221 { 222 u16 phyreg; 223 u32 i, ret; 224 struct axidma_priv *priv = dev_get_priv(dev); 225 struct axi_regs *regs = priv->iobase; 226 struct phy_device *phydev; 227 228 u32 supported = SUPPORTED_10baseT_Half | 229 SUPPORTED_10baseT_Full | 230 SUPPORTED_100baseT_Half | 231 SUPPORTED_100baseT_Full | 232 SUPPORTED_1000baseT_Half | 233 SUPPORTED_1000baseT_Full; 234 235 /* Set default MDIO divisor */ 236 out_be32(®s->mdio_mc, XAE_MDIO_DIV_DFT | XAE_MDIO_MC_MDIOEN_MASK); 237 238 if (priv->phyaddr == -1) { 239 /* Detect the PHY address */ 240 for (i = 31; i >= 0; i--) { 241 ret = phyread(priv, i, PHY_DETECT_REG, &phyreg); 242 if (!ret && (phyreg != 0xFFFF) && 243 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { 244 /* Found a valid PHY address */ 245 priv->phyaddr = i; 246 debug("axiemac: Found valid phy address, %x\n", 247 i); 248 break; 249 } 250 } 251 } 252 253 /* Interface - look at tsec */ 254 phydev = phy_connect(priv->bus, priv->phyaddr, dev, priv->interface); 255 256 phydev->supported &= supported; 257 phydev->advertising = phydev->supported; 258 priv->phydev = phydev; 259 phy_config(phydev); 260 261 return 0; 262 } 263 264 /* Setting axi emac and phy to proper setting */ 265 static int setup_phy(struct udevice *dev) 266 { 267 u16 temp; 268 u32 speed, emmc_reg, ret; 269 struct axidma_priv *priv = dev_get_priv(dev); 270 struct axi_regs *regs = priv->iobase; 271 struct phy_device *phydev = priv->phydev; 272 273 if (priv->interface == PHY_INTERFACE_MODE_SGMII) { 274 /* 275 * In SGMII cases the isolate bit might set 276 * after DMA and ethernet resets and hence 277 * check and clear if set. 278 */ 279 ret = phyread(priv, priv->phyaddr, MII_BMCR, &temp); 280 if (ret) 281 return 0; 282 if (temp & BMCR_ISOLATE) { 283 temp &= ~BMCR_ISOLATE; 284 ret = phywrite(priv, priv->phyaddr, MII_BMCR, temp); 285 if (ret) 286 return 0; 287 } 288 } 289 290 if (phy_startup(phydev)) { 291 printf("axiemac: could not initialize PHY %s\n", 292 phydev->dev->name); 293 return 0; 294 } 295 if (!phydev->link) { 296 printf("%s: No link.\n", phydev->dev->name); 297 return 0; 298 } 299 300 switch (phydev->speed) { 301 case 1000: 302 speed = XAE_EMMC_LINKSPD_1000; 303 break; 304 case 100: 305 speed = XAE_EMMC_LINKSPD_100; 306 break; 307 case 10: 308 speed = XAE_EMMC_LINKSPD_10; 309 break; 310 default: 311 return 0; 312 } 313 314 /* Setup the emac for the phy speed */ 315 emmc_reg = in_be32(®s->emmc); 316 emmc_reg &= ~XAE_EMMC_LINKSPEED_MASK; 317 emmc_reg |= speed; 318 319 /* Write new speed setting out to Axi Ethernet */ 320 out_be32(®s->emmc, emmc_reg); 321 322 /* 323 * Setting the operating speed of the MAC needs a delay. There 324 * doesn't seem to be register to poll, so please consider this 325 * during your application design. 326 */ 327 udelay(1); 328 329 return 1; 330 } 331 332 /* STOP DMA transfers */ 333 static void axiemac_stop(struct udevice *dev) 334 { 335 struct axidma_priv *priv = dev_get_priv(dev); 336 u32 temp; 337 338 /* Stop the hardware */ 339 temp = in_be32(&priv->dmatx->control); 340 temp &= ~XAXIDMA_CR_RUNSTOP_MASK; 341 out_be32(&priv->dmatx->control, temp); 342 343 temp = in_be32(&priv->dmarx->control); 344 temp &= ~XAXIDMA_CR_RUNSTOP_MASK; 345 out_be32(&priv->dmarx->control, temp); 346 347 debug("axiemac: Halted\n"); 348 } 349 350 static int axi_ethernet_init(struct axidma_priv *priv) 351 { 352 struct axi_regs *regs = priv->iobase; 353 u32 timeout = 200; 354 355 /* 356 * Check the status of the MgtRdy bit in the interrupt status 357 * registers. This must be done to allow the MGT clock to become stable 358 * for the Sgmii and 1000BaseX PHY interfaces. No other register reads 359 * will be valid until this bit is valid. 360 * The bit is always a 1 for all other PHY interfaces. 361 */ 362 while (timeout && (!(in_be32(®s->is) & XAE_INT_MGTRDY_MASK))) { 363 timeout--; 364 udelay(1); 365 } 366 if (!timeout) { 367 printf("%s: Timeout\n", __func__); 368 return 1; 369 } 370 371 /* Stop the device and reset HW */ 372 /* Disable interrupts */ 373 out_be32(®s->ie, 0); 374 375 /* Disable the receiver */ 376 out_be32(®s->rcw1, in_be32(®s->rcw1) & ~XAE_RCW1_RX_MASK); 377 378 /* 379 * Stopping the receiver in mid-packet causes a dropped packet 380 * indication from HW. Clear it. 381 */ 382 /* Set the interrupt status register to clear the interrupt */ 383 out_be32(®s->is, XAE_INT_RXRJECT_MASK); 384 385 /* Setup HW */ 386 /* Set default MDIO divisor */ 387 out_be32(®s->mdio_mc, XAE_MDIO_DIV_DFT | XAE_MDIO_MC_MDIOEN_MASK); 388 389 debug("axiemac: InitHw done\n"); 390 return 0; 391 } 392 393 static int axiemac_write_hwaddr(struct udevice *dev) 394 { 395 struct eth_pdata *pdata = dev_get_platdata(dev); 396 struct axidma_priv *priv = dev_get_priv(dev); 397 struct axi_regs *regs = priv->iobase; 398 399 /* Set the MAC address */ 400 int val = ((pdata->enetaddr[3] << 24) | (pdata->enetaddr[2] << 16) | 401 (pdata->enetaddr[1] << 8) | (pdata->enetaddr[0])); 402 out_be32(®s->uaw0, val); 403 404 val = (pdata->enetaddr[5] << 8) | pdata->enetaddr[4]; 405 val |= in_be32(®s->uaw1) & ~XAE_UAW1_UNICASTADDR_MASK; 406 out_be32(®s->uaw1, val); 407 return 0; 408 } 409 410 /* Reset DMA engine */ 411 static void axi_dma_init(struct axidma_priv *priv) 412 { 413 u32 timeout = 500; 414 415 /* Reset the engine so the hardware starts from a known state */ 416 out_be32(&priv->dmatx->control, XAXIDMA_CR_RESET_MASK); 417 out_be32(&priv->dmarx->control, XAXIDMA_CR_RESET_MASK); 418 419 /* At the initialization time, hardware should finish reset quickly */ 420 while (timeout--) { 421 /* Check transmit/receive channel */ 422 /* Reset is done when the reset bit is low */ 423 if (!((in_be32(&priv->dmatx->control) | 424 in_be32(&priv->dmarx->control)) 425 & XAXIDMA_CR_RESET_MASK)) { 426 break; 427 } 428 } 429 if (!timeout) 430 printf("%s: Timeout\n", __func__); 431 } 432 433 static int axiemac_start(struct udevice *dev) 434 { 435 struct axidma_priv *priv = dev_get_priv(dev); 436 struct axi_regs *regs = priv->iobase; 437 u32 temp; 438 439 debug("axiemac: Init started\n"); 440 /* 441 * Initialize AXIDMA engine. AXIDMA engine must be initialized before 442 * AxiEthernet. During AXIDMA engine initialization, AXIDMA hardware is 443 * reset, and since AXIDMA reset line is connected to AxiEthernet, this 444 * would ensure a reset of AxiEthernet. 445 */ 446 axi_dma_init(priv); 447 448 /* Initialize AxiEthernet hardware. */ 449 if (axi_ethernet_init(priv)) 450 return -1; 451 452 /* Disable all RX interrupts before RxBD space setup */ 453 temp = in_be32(&priv->dmarx->control); 454 temp &= ~XAXIDMA_IRQ_ALL_MASK; 455 out_be32(&priv->dmarx->control, temp); 456 457 /* Start DMA RX channel. Now it's ready to receive data.*/ 458 out_be32(&priv->dmarx->current, (u32)&rx_bd); 459 460 /* Setup the BD. */ 461 memset(&rx_bd, 0, sizeof(rx_bd)); 462 rx_bd.next = (u32)&rx_bd; 463 rx_bd.phys = (u32)&rxframe; 464 rx_bd.cntrl = sizeof(rxframe); 465 /* Flush the last BD so DMA core could see the updates */ 466 flush_cache((u32)&rx_bd, sizeof(rx_bd)); 467 468 /* It is necessary to flush rxframe because if you don't do it 469 * then cache can contain uninitialized data */ 470 flush_cache((u32)&rxframe, sizeof(rxframe)); 471 472 /* Start the hardware */ 473 temp = in_be32(&priv->dmarx->control); 474 temp |= XAXIDMA_CR_RUNSTOP_MASK; 475 out_be32(&priv->dmarx->control, temp); 476 477 /* Rx BD is ready - start */ 478 out_be32(&priv->dmarx->tail, (u32)&rx_bd); 479 480 /* Enable TX */ 481 out_be32(®s->tc, XAE_TC_TX_MASK); 482 /* Enable RX */ 483 out_be32(®s->rcw1, XAE_RCW1_RX_MASK); 484 485 /* PHY setup */ 486 if (!setup_phy(dev)) { 487 axiemac_stop(dev); 488 return -1; 489 } 490 491 debug("axiemac: Init complete\n"); 492 return 0; 493 } 494 495 static int axiemac_send(struct udevice *dev, void *ptr, int len) 496 { 497 struct axidma_priv *priv = dev_get_priv(dev); 498 u32 timeout; 499 500 if (len > PKTSIZE_ALIGN) 501 len = PKTSIZE_ALIGN; 502 503 /* Flush packet to main memory to be trasfered by DMA */ 504 flush_cache((u32)ptr, len); 505 506 /* Setup Tx BD */ 507 memset(&tx_bd, 0, sizeof(tx_bd)); 508 /* At the end of the ring, link the last BD back to the top */ 509 tx_bd.next = (u32)&tx_bd; 510 tx_bd.phys = (u32)ptr; 511 /* Save len */ 512 tx_bd.cntrl = len | XAXIDMA_BD_CTRL_TXSOF_MASK | 513 XAXIDMA_BD_CTRL_TXEOF_MASK; 514 515 /* Flush the last BD so DMA core could see the updates */ 516 flush_cache((u32)&tx_bd, sizeof(tx_bd)); 517 518 if (in_be32(&priv->dmatx->status) & XAXIDMA_HALTED_MASK) { 519 u32 temp; 520 out_be32(&priv->dmatx->current, (u32)&tx_bd); 521 /* Start the hardware */ 522 temp = in_be32(&priv->dmatx->control); 523 temp |= XAXIDMA_CR_RUNSTOP_MASK; 524 out_be32(&priv->dmatx->control, temp); 525 } 526 527 /* Start transfer */ 528 out_be32(&priv->dmatx->tail, (u32)&tx_bd); 529 530 /* Wait for transmission to complete */ 531 debug("axiemac: Waiting for tx to be done\n"); 532 timeout = 200; 533 while (timeout && (!(in_be32(&priv->dmatx->status) & 534 (XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK)))) { 535 timeout--; 536 udelay(1); 537 } 538 if (!timeout) { 539 printf("%s: Timeout\n", __func__); 540 return 1; 541 } 542 543 debug("axiemac: Sending complete\n"); 544 return 0; 545 } 546 547 static int isrxready(struct axidma_priv *priv) 548 { 549 u32 status; 550 551 /* Read pending interrupts */ 552 status = in_be32(&priv->dmarx->status); 553 554 /* Acknowledge pending interrupts */ 555 out_be32(&priv->dmarx->status, status & XAXIDMA_IRQ_ALL_MASK); 556 557 /* 558 * If Reception done interrupt is asserted, call RX call back function 559 * to handle the processed BDs and then raise the according flag. 560 */ 561 if ((status & (XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK))) 562 return 1; 563 564 return 0; 565 } 566 567 static int axiemac_recv(struct udevice *dev, int flags, uchar **packetp) 568 { 569 u32 length; 570 struct axidma_priv *priv = dev_get_priv(dev); 571 u32 temp; 572 573 /* Wait for an incoming packet */ 574 if (!isrxready(priv)) 575 return -1; 576 577 debug("axiemac: RX data ready\n"); 578 579 /* Disable IRQ for a moment till packet is handled */ 580 temp = in_be32(&priv->dmarx->control); 581 temp &= ~XAXIDMA_IRQ_ALL_MASK; 582 out_be32(&priv->dmarx->control, temp); 583 584 length = rx_bd.app4 & 0xFFFF; /* max length mask */ 585 #ifdef DEBUG 586 print_buffer(&rxframe, &rxframe[0], 1, length, 16); 587 #endif 588 589 *packetp = rxframe; 590 return length; 591 } 592 593 static int axiemac_free_pkt(struct udevice *dev, uchar *packet, int length) 594 { 595 struct axidma_priv *priv = dev_get_priv(dev); 596 597 #ifdef DEBUG 598 /* It is useful to clear buffer to be sure that it is consistent */ 599 memset(rxframe, 0, sizeof(rxframe)); 600 #endif 601 /* Setup RxBD */ 602 /* Clear the whole buffer and setup it again - all flags are cleared */ 603 memset(&rx_bd, 0, sizeof(rx_bd)); 604 rx_bd.next = (u32)&rx_bd; 605 rx_bd.phys = (u32)&rxframe; 606 rx_bd.cntrl = sizeof(rxframe); 607 608 /* Write bd to HW */ 609 flush_cache((u32)&rx_bd, sizeof(rx_bd)); 610 611 /* It is necessary to flush rxframe because if you don't do it 612 * then cache will contain previous packet */ 613 flush_cache((u32)&rxframe, sizeof(rxframe)); 614 615 /* Rx BD is ready - start again */ 616 out_be32(&priv->dmarx->tail, (u32)&rx_bd); 617 618 debug("axiemac: RX completed, framelength = %d\n", length); 619 620 return 0; 621 } 622 623 static int axiemac_miiphy_read(struct mii_dev *bus, int addr, 624 int devad, int reg) 625 { 626 int ret; 627 u16 value; 628 629 ret = phyread(bus->priv, addr, reg, &value); 630 debug("axiemac: Read MII 0x%x, 0x%x, 0x%x, %d\n", addr, reg, 631 value, ret); 632 return value; 633 } 634 635 static int axiemac_miiphy_write(struct mii_dev *bus, int addr, int devad, 636 int reg, u16 value) 637 { 638 debug("axiemac: Write MII 0x%x, 0x%x, 0x%x\n", addr, reg, value); 639 return phywrite(bus->priv, addr, reg, value); 640 } 641 642 static int axi_emac_probe(struct udevice *dev) 643 { 644 struct axidma_priv *priv = dev_get_priv(dev); 645 int ret; 646 647 priv->bus = mdio_alloc(); 648 priv->bus->read = axiemac_miiphy_read; 649 priv->bus->write = axiemac_miiphy_write; 650 priv->bus->priv = priv; 651 strcpy(priv->bus->name, "axi_emac"); 652 653 ret = mdio_register(priv->bus); 654 if (ret) 655 return ret; 656 657 axiemac_phy_init(dev); 658 659 return 0; 660 } 661 662 static int axi_emac_remove(struct udevice *dev) 663 { 664 struct axidma_priv *priv = dev_get_priv(dev); 665 666 free(priv->phydev); 667 mdio_unregister(priv->bus); 668 mdio_free(priv->bus); 669 670 return 0; 671 } 672 673 static const struct eth_ops axi_emac_ops = { 674 .start = axiemac_start, 675 .send = axiemac_send, 676 .recv = axiemac_recv, 677 .free_pkt = axiemac_free_pkt, 678 .stop = axiemac_stop, 679 .write_hwaddr = axiemac_write_hwaddr, 680 }; 681 682 static int axi_emac_ofdata_to_platdata(struct udevice *dev) 683 { 684 struct eth_pdata *pdata = dev_get_platdata(dev); 685 struct axidma_priv *priv = dev_get_priv(dev); 686 int offset = 0; 687 const char *phy_mode; 688 689 pdata->iobase = (phys_addr_t)dev_get_addr(dev); 690 priv->iobase = (struct axi_regs *)pdata->iobase; 691 692 offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset, 693 "axistream-connected"); 694 if (offset <= 0) { 695 printf("%s: axistream is not found\n", __func__); 696 return -EINVAL; 697 } 698 priv->dmatx = (struct axidma_reg *)fdtdec_get_int(gd->fdt_blob, 699 offset, "reg", 0); 700 if (!priv->dmatx) { 701 printf("%s: axi_dma register space not found\n", __func__); 702 return -EINVAL; 703 } 704 /* RX channel offset is 0x30 */ 705 priv->dmarx = (struct axidma_reg *)((u32)priv->dmatx + 0x30); 706 707 priv->phyaddr = -1; 708 709 offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset, 710 "phy-handle"); 711 if (offset > 0) 712 priv->phyaddr = fdtdec_get_int(gd->fdt_blob, offset, "reg", -1); 713 714 phy_mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "phy-mode", NULL); 715 if (phy_mode) 716 pdata->phy_interface = phy_get_interface_by_name(phy_mode); 717 if (pdata->phy_interface == -1) { 718 printf("%s: Invalid PHY interface '%s'\n", __func__, phy_mode); 719 return -EINVAL; 720 } 721 priv->interface = pdata->phy_interface; 722 723 printf("AXI EMAC: %lx, phyaddr %d, interface %s\n", (ulong)priv->iobase, 724 priv->phyaddr, phy_string_for_interface(priv->interface)); 725 726 return 0; 727 } 728 729 static const struct udevice_id axi_emac_ids[] = { 730 { .compatible = "xlnx,axi-ethernet-1.00.a" }, 731 { } 732 }; 733 734 U_BOOT_DRIVER(axi_emac) = { 735 .name = "axi_emac", 736 .id = UCLASS_ETH, 737 .of_match = axi_emac_ids, 738 .ofdata_to_platdata = axi_emac_ofdata_to_platdata, 739 .probe = axi_emac_probe, 740 .remove = axi_emac_remove, 741 .ops = &axi_emac_ops, 742 .priv_auto_alloc_size = sizeof(struct axidma_priv), 743 .platdata_auto_alloc_size = sizeof(struct eth_pdata), 744 }; 745