1 /* 2 * (C) Copyright 2011 Michal Simek 3 * 4 * Michal SIMEK <monstr@monstr.eu> 5 * 6 * Based on Xilinx gmac driver: 7 * (C) Copyright 2011 Xilinx 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <common.h> 13 #include <dm.h> 14 #include <net.h> 15 #include <netdev.h> 16 #include <config.h> 17 #include <console.h> 18 #include <malloc.h> 19 #include <asm/io.h> 20 #include <phy.h> 21 #include <miiphy.h> 22 #include <wait_bit.h> 23 #include <watchdog.h> 24 #include <asm/system.h> 25 #include <asm/arch/hardware.h> 26 #include <asm/arch/sys_proto.h> 27 #include <asm-generic/errno.h> 28 29 DECLARE_GLOBAL_DATA_PTR; 30 31 /* Bit/mask specification */ 32 #define ZYNQ_GEM_PHYMNTNC_OP_MASK 0x40020000 /* operation mask bits */ 33 #define ZYNQ_GEM_PHYMNTNC_OP_R_MASK 0x20000000 /* read operation */ 34 #define ZYNQ_GEM_PHYMNTNC_OP_W_MASK 0x10000000 /* write operation */ 35 #define ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK 23 /* Shift bits for PHYAD */ 36 #define ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK 18 /* Shift bits for PHREG */ 37 38 #define ZYNQ_GEM_RXBUF_EOF_MASK 0x00008000 /* End of frame. */ 39 #define ZYNQ_GEM_RXBUF_SOF_MASK 0x00004000 /* Start of frame. */ 40 #define ZYNQ_GEM_RXBUF_LEN_MASK 0x00003FFF /* Mask for length field */ 41 42 #define ZYNQ_GEM_RXBUF_WRAP_MASK 0x00000002 /* Wrap bit, last BD */ 43 #define ZYNQ_GEM_RXBUF_NEW_MASK 0x00000001 /* Used bit.. */ 44 #define ZYNQ_GEM_RXBUF_ADD_MASK 0xFFFFFFFC /* Mask for address */ 45 46 /* Wrap bit, last descriptor */ 47 #define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000 48 #define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */ 49 #define ZYNQ_GEM_TXBUF_USED_MASK 0x80000000 /* Used by Hw */ 50 51 #define ZYNQ_GEM_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */ 52 #define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */ 53 #define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */ 54 #define ZYNQ_GEM_NWCTRL_STARTTX_MASK 0x00000200 /* Start tx (tx_go) */ 55 56 #define ZYNQ_GEM_NWCFG_SPEED100 0x000000001 /* 100 Mbps operation */ 57 #define ZYNQ_GEM_NWCFG_SPEED1000 0x000000400 /* 1Gbps operation */ 58 #define ZYNQ_GEM_NWCFG_FDEN 0x000000002 /* Full Duplex mode */ 59 #define ZYNQ_GEM_NWCFG_FSREM 0x000020000 /* FCS removal */ 60 #define ZYNQ_GEM_NWCFG_SGMII_ENBL 0x080000000 /* SGMII Enable */ 61 #define ZYNQ_GEM_NWCFG_PCS_SEL 0x000000800 /* PCS select */ 62 #ifdef CONFIG_ARM64 63 #define ZYNQ_GEM_NWCFG_MDCCLKDIV 0x000100000 /* Div pclk by 64, max 160MHz */ 64 #else 65 #define ZYNQ_GEM_NWCFG_MDCCLKDIV 0x0000c0000 /* Div pclk by 48, max 120MHz */ 66 #endif 67 68 #ifdef CONFIG_ARM64 69 # define ZYNQ_GEM_DBUS_WIDTH (1 << 21) /* 64 bit bus */ 70 #else 71 # define ZYNQ_GEM_DBUS_WIDTH (0 << 21) /* 32 bit bus */ 72 #endif 73 74 #define ZYNQ_GEM_NWCFG_INIT (ZYNQ_GEM_DBUS_WIDTH | \ 75 ZYNQ_GEM_NWCFG_FDEN | \ 76 ZYNQ_GEM_NWCFG_FSREM | \ 77 ZYNQ_GEM_NWCFG_MDCCLKDIV) 78 79 #define ZYNQ_GEM_NWSR_MDIOIDLE_MASK 0x00000004 /* PHY management idle */ 80 81 #define ZYNQ_GEM_DMACR_BLENGTH 0x00000004 /* INCR4 AHB bursts */ 82 /* Use full configured addressable space (8 Kb) */ 83 #define ZYNQ_GEM_DMACR_RXSIZE 0x00000300 84 /* Use full configured addressable space (4 Kb) */ 85 #define ZYNQ_GEM_DMACR_TXSIZE 0x00000400 86 /* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */ 87 #define ZYNQ_GEM_DMACR_RXBUF 0x00180000 88 89 #define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \ 90 ZYNQ_GEM_DMACR_RXSIZE | \ 91 ZYNQ_GEM_DMACR_TXSIZE | \ 92 ZYNQ_GEM_DMACR_RXBUF) 93 94 #define ZYNQ_GEM_TSR_DONE 0x00000020 /* Tx done mask */ 95 96 #define ZYNQ_GEM_PCS_CTL_ANEG_ENBL 0x1000 97 98 /* Use MII register 1 (MII status register) to detect PHY */ 99 #define PHY_DETECT_REG 1 100 101 /* Mask used to verify certain PHY features (or register contents) 102 * in the register above: 103 * 0x1000: 10Mbps full duplex support 104 * 0x0800: 10Mbps half duplex support 105 * 0x0008: Auto-negotiation support 106 */ 107 #define PHY_DETECT_MASK 0x1808 108 109 /* TX BD status masks */ 110 #define ZYNQ_GEM_TXBUF_FRMLEN_MASK 0x000007ff 111 #define ZYNQ_GEM_TXBUF_EXHAUSTED 0x08000000 112 #define ZYNQ_GEM_TXBUF_UNDERRUN 0x10000000 113 114 /* Clock frequencies for different speeds */ 115 #define ZYNQ_GEM_FREQUENCY_10 2500000UL 116 #define ZYNQ_GEM_FREQUENCY_100 25000000UL 117 #define ZYNQ_GEM_FREQUENCY_1000 125000000UL 118 119 /* Device registers */ 120 struct zynq_gem_regs { 121 u32 nwctrl; /* 0x0 - Network Control reg */ 122 u32 nwcfg; /* 0x4 - Network Config reg */ 123 u32 nwsr; /* 0x8 - Network Status reg */ 124 u32 reserved1; 125 u32 dmacr; /* 0x10 - DMA Control reg */ 126 u32 txsr; /* 0x14 - TX Status reg */ 127 u32 rxqbase; /* 0x18 - RX Q Base address reg */ 128 u32 txqbase; /* 0x1c - TX Q Base address reg */ 129 u32 rxsr; /* 0x20 - RX Status reg */ 130 u32 reserved2[2]; 131 u32 idr; /* 0x2c - Interrupt Disable reg */ 132 u32 reserved3; 133 u32 phymntnc; /* 0x34 - Phy Maintaince reg */ 134 u32 reserved4[18]; 135 u32 hashl; /* 0x80 - Hash Low address reg */ 136 u32 hashh; /* 0x84 - Hash High address reg */ 137 #define LADDR_LOW 0 138 #define LADDR_HIGH 1 139 u32 laddr[4][LADDR_HIGH + 1]; /* 0x8c - Specific1 addr low/high reg */ 140 u32 match[4]; /* 0xa8 - Type ID1 Match reg */ 141 u32 reserved6[18]; 142 #define STAT_SIZE 44 143 u32 stat[STAT_SIZE]; /* 0x100 - Octects transmitted Low reg */ 144 u32 reserved9[20]; 145 u32 pcscntrl; 146 u32 reserved7[143]; 147 u32 transmit_q1_ptr; /* 0x440 - Transmit priority queue 1 */ 148 u32 reserved8[15]; 149 u32 receive_q1_ptr; /* 0x480 - Receive priority queue 1 */ 150 }; 151 152 /* BD descriptors */ 153 struct emac_bd { 154 u32 addr; /* Next descriptor pointer */ 155 u32 status; 156 }; 157 158 #define RX_BUF 32 159 /* Page table entries are set to 1MB, or multiples of 1MB 160 * (not < 1MB). driver uses less bd's so use 1MB bdspace. 161 */ 162 #define BD_SPACE 0x100000 163 /* BD separation space */ 164 #define BD_SEPRN_SPACE (RX_BUF * sizeof(struct emac_bd)) 165 166 /* Setup the first free TX descriptor */ 167 #define TX_FREE_DESC 2 168 169 /* Initialized, rxbd_current, rx_first_buf must be 0 after init */ 170 struct zynq_gem_priv { 171 struct emac_bd *tx_bd; 172 struct emac_bd *rx_bd; 173 char *rxbuffers; 174 u32 rxbd_current; 175 u32 rx_first_buf; 176 int phyaddr; 177 u32 emio; 178 int init; 179 struct zynq_gem_regs *iobase; 180 phy_interface_t interface; 181 struct phy_device *phydev; 182 struct mii_dev *bus; 183 }; 184 185 static inline int mdio_wait(struct zynq_gem_regs *regs) 186 { 187 u32 timeout = 20000; 188 189 /* Wait till MDIO interface is ready to accept a new transaction. */ 190 while (--timeout) { 191 if (readl(®s->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK) 192 break; 193 WATCHDOG_RESET(); 194 } 195 196 if (!timeout) { 197 printf("%s: Timeout\n", __func__); 198 return 1; 199 } 200 201 return 0; 202 } 203 204 static u32 phy_setup_op(struct zynq_gem_priv *priv, u32 phy_addr, u32 regnum, 205 u32 op, u16 *data) 206 { 207 u32 mgtcr; 208 struct zynq_gem_regs *regs = priv->iobase; 209 210 if (mdio_wait(regs)) 211 return 1; 212 213 /* Construct mgtcr mask for the operation */ 214 mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op | 215 (phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) | 216 (regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data; 217 218 /* Write mgtcr and wait for completion */ 219 writel(mgtcr, ®s->phymntnc); 220 221 if (mdio_wait(regs)) 222 return 1; 223 224 if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK) 225 *data = readl(®s->phymntnc); 226 227 return 0; 228 } 229 230 static u32 phyread(struct zynq_gem_priv *priv, u32 phy_addr, 231 u32 regnum, u16 *val) 232 { 233 u32 ret; 234 235 ret = phy_setup_op(priv, phy_addr, regnum, 236 ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val); 237 238 if (!ret) 239 debug("%s: phy_addr %d, regnum 0x%x, val 0x%x\n", __func__, 240 phy_addr, regnum, *val); 241 242 return ret; 243 } 244 245 static u32 phywrite(struct zynq_gem_priv *priv, u32 phy_addr, 246 u32 regnum, u16 data) 247 { 248 debug("%s: phy_addr %d, regnum 0x%x, data 0x%x\n", __func__, phy_addr, 249 regnum, data); 250 251 return phy_setup_op(priv, phy_addr, regnum, 252 ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data); 253 } 254 255 static int phy_detection(struct udevice *dev) 256 { 257 int i; 258 u16 phyreg; 259 struct zynq_gem_priv *priv = dev->priv; 260 261 if (priv->phyaddr != -1) { 262 phyread(priv, priv->phyaddr, PHY_DETECT_REG, &phyreg); 263 if ((phyreg != 0xFFFF) && 264 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { 265 /* Found a valid PHY address */ 266 debug("Default phy address %d is valid\n", 267 priv->phyaddr); 268 return 0; 269 } else { 270 debug("PHY address is not setup correctly %d\n", 271 priv->phyaddr); 272 priv->phyaddr = -1; 273 } 274 } 275 276 debug("detecting phy address\n"); 277 if (priv->phyaddr == -1) { 278 /* detect the PHY address */ 279 for (i = 31; i >= 0; i--) { 280 phyread(priv, i, PHY_DETECT_REG, &phyreg); 281 if ((phyreg != 0xFFFF) && 282 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { 283 /* Found a valid PHY address */ 284 priv->phyaddr = i; 285 debug("Found valid phy address, %d\n", i); 286 return 0; 287 } 288 } 289 } 290 printf("PHY is not detected\n"); 291 return -1; 292 } 293 294 static int zynq_gem_setup_mac(struct udevice *dev) 295 { 296 u32 i, macaddrlow, macaddrhigh; 297 struct eth_pdata *pdata = dev_get_platdata(dev); 298 struct zynq_gem_priv *priv = dev_get_priv(dev); 299 struct zynq_gem_regs *regs = priv->iobase; 300 301 /* Set the MAC bits [31:0] in BOT */ 302 macaddrlow = pdata->enetaddr[0]; 303 macaddrlow |= pdata->enetaddr[1] << 8; 304 macaddrlow |= pdata->enetaddr[2] << 16; 305 macaddrlow |= pdata->enetaddr[3] << 24; 306 307 /* Set MAC bits [47:32] in TOP */ 308 macaddrhigh = pdata->enetaddr[4]; 309 macaddrhigh |= pdata->enetaddr[5] << 8; 310 311 for (i = 0; i < 4; i++) { 312 writel(0, ®s->laddr[i][LADDR_LOW]); 313 writel(0, ®s->laddr[i][LADDR_HIGH]); 314 /* Do not use MATCHx register */ 315 writel(0, ®s->match[i]); 316 } 317 318 writel(macaddrlow, ®s->laddr[0][LADDR_LOW]); 319 writel(macaddrhigh, ®s->laddr[0][LADDR_HIGH]); 320 321 return 0; 322 } 323 324 static int zynq_phy_init(struct udevice *dev) 325 { 326 int ret; 327 struct zynq_gem_priv *priv = dev_get_priv(dev); 328 struct zynq_gem_regs *regs = priv->iobase; 329 const u32 supported = SUPPORTED_10baseT_Half | 330 SUPPORTED_10baseT_Full | 331 SUPPORTED_100baseT_Half | 332 SUPPORTED_100baseT_Full | 333 SUPPORTED_1000baseT_Half | 334 SUPPORTED_1000baseT_Full; 335 336 /* Enable only MDIO bus */ 337 writel(ZYNQ_GEM_NWCTRL_MDEN_MASK, ®s->nwctrl); 338 339 if (priv->interface != PHY_INTERFACE_MODE_SGMII) { 340 ret = phy_detection(dev); 341 if (ret) { 342 printf("GEM PHY init failed\n"); 343 return ret; 344 } 345 } 346 347 priv->phydev = phy_connect(priv->bus, priv->phyaddr, dev, 348 priv->interface); 349 if (!priv->phydev) 350 return -ENODEV; 351 352 priv->phydev->supported = supported | ADVERTISED_Pause | 353 ADVERTISED_Asym_Pause; 354 priv->phydev->advertising = priv->phydev->supported; 355 phy_config(priv->phydev); 356 357 return 0; 358 } 359 360 static int zynq_gem_init(struct udevice *dev) 361 { 362 u32 i, nwconfig; 363 unsigned long clk_rate = 0; 364 struct zynq_gem_priv *priv = dev_get_priv(dev); 365 struct zynq_gem_regs *regs = priv->iobase; 366 struct emac_bd *dummy_tx_bd = &priv->tx_bd[TX_FREE_DESC]; 367 struct emac_bd *dummy_rx_bd = &priv->tx_bd[TX_FREE_DESC + 2]; 368 369 if (!priv->init) { 370 /* Disable all interrupts */ 371 writel(0xFFFFFFFF, ®s->idr); 372 373 /* Disable the receiver & transmitter */ 374 writel(0, ®s->nwctrl); 375 writel(0, ®s->txsr); 376 writel(0, ®s->rxsr); 377 writel(0, ®s->phymntnc); 378 379 /* Clear the Hash registers for the mac address 380 * pointed by AddressPtr 381 */ 382 writel(0x0, ®s->hashl); 383 /* Write bits [63:32] in TOP */ 384 writel(0x0, ®s->hashh); 385 386 /* Clear all counters */ 387 for (i = 0; i < STAT_SIZE; i++) 388 readl(®s->stat[i]); 389 390 /* Setup RxBD space */ 391 memset(priv->rx_bd, 0, RX_BUF * sizeof(struct emac_bd)); 392 393 for (i = 0; i < RX_BUF; i++) { 394 priv->rx_bd[i].status = 0xF0000000; 395 priv->rx_bd[i].addr = 396 ((ulong)(priv->rxbuffers) + 397 (i * PKTSIZE_ALIGN)); 398 } 399 /* WRAP bit to last BD */ 400 priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK; 401 /* Write RxBDs to IP */ 402 writel((ulong)priv->rx_bd, ®s->rxqbase); 403 404 /* Setup for DMA Configuration register */ 405 writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr); 406 407 /* Setup for Network Control register, MDIO, Rx and Tx enable */ 408 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK); 409 410 /* Disable the second priority queue */ 411 dummy_tx_bd->addr = 0; 412 dummy_tx_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK | 413 ZYNQ_GEM_TXBUF_LAST_MASK| 414 ZYNQ_GEM_TXBUF_USED_MASK; 415 416 dummy_rx_bd->addr = ZYNQ_GEM_RXBUF_WRAP_MASK | 417 ZYNQ_GEM_RXBUF_NEW_MASK; 418 dummy_rx_bd->status = 0; 419 flush_dcache_range((ulong)&dummy_tx_bd, (ulong)&dummy_tx_bd + 420 sizeof(dummy_tx_bd)); 421 flush_dcache_range((ulong)&dummy_rx_bd, (ulong)&dummy_rx_bd + 422 sizeof(dummy_rx_bd)); 423 424 writel((ulong)dummy_tx_bd, ®s->transmit_q1_ptr); 425 writel((ulong)dummy_rx_bd, ®s->receive_q1_ptr); 426 427 priv->init++; 428 } 429 430 phy_startup(priv->phydev); 431 432 if (!priv->phydev->link) { 433 printf("%s: No link.\n", priv->phydev->dev->name); 434 return -1; 435 } 436 437 nwconfig = ZYNQ_GEM_NWCFG_INIT; 438 439 if (priv->interface == PHY_INTERFACE_MODE_SGMII) { 440 nwconfig |= ZYNQ_GEM_NWCFG_SGMII_ENBL | 441 ZYNQ_GEM_NWCFG_PCS_SEL; 442 #ifdef CONFIG_ARM64 443 writel(readl(®s->pcscntrl) | ZYNQ_GEM_PCS_CTL_ANEG_ENBL, 444 ®s->pcscntrl); 445 #endif 446 } 447 448 switch (priv->phydev->speed) { 449 case SPEED_1000: 450 writel(nwconfig | ZYNQ_GEM_NWCFG_SPEED1000, 451 ®s->nwcfg); 452 clk_rate = ZYNQ_GEM_FREQUENCY_1000; 453 break; 454 case SPEED_100: 455 writel(nwconfig | ZYNQ_GEM_NWCFG_SPEED100, 456 ®s->nwcfg); 457 clk_rate = ZYNQ_GEM_FREQUENCY_100; 458 break; 459 case SPEED_10: 460 clk_rate = ZYNQ_GEM_FREQUENCY_10; 461 break; 462 } 463 464 /* Change the rclk and clk only not using EMIO interface */ 465 if (!priv->emio) 466 zynq_slcr_gem_clk_setup((ulong)priv->iobase != 467 ZYNQ_GEM_BASEADDR0, clk_rate); 468 469 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | 470 ZYNQ_GEM_NWCTRL_TXEN_MASK); 471 472 return 0; 473 } 474 475 static int zynq_gem_send(struct udevice *dev, void *ptr, int len) 476 { 477 u32 addr, size; 478 struct zynq_gem_priv *priv = dev_get_priv(dev); 479 struct zynq_gem_regs *regs = priv->iobase; 480 struct emac_bd *current_bd = &priv->tx_bd[1]; 481 482 /* Setup Tx BD */ 483 memset(priv->tx_bd, 0, sizeof(struct emac_bd)); 484 485 priv->tx_bd->addr = (ulong)ptr; 486 priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) | 487 ZYNQ_GEM_TXBUF_LAST_MASK; 488 /* Dummy descriptor to mark it as the last in descriptor chain */ 489 current_bd->addr = 0x0; 490 current_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK | 491 ZYNQ_GEM_TXBUF_LAST_MASK| 492 ZYNQ_GEM_TXBUF_USED_MASK; 493 494 /* setup BD */ 495 writel((ulong)priv->tx_bd, ®s->txqbase); 496 497 addr = (ulong) ptr; 498 addr &= ~(ARCH_DMA_MINALIGN - 1); 499 size = roundup(len, ARCH_DMA_MINALIGN); 500 flush_dcache_range(addr, addr + size); 501 502 addr = (ulong)priv->rxbuffers; 503 addr &= ~(ARCH_DMA_MINALIGN - 1); 504 size = roundup((RX_BUF * PKTSIZE_ALIGN), ARCH_DMA_MINALIGN); 505 flush_dcache_range(addr, addr + size); 506 barrier(); 507 508 /* Start transmit */ 509 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK); 510 511 /* Read TX BD status */ 512 if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_EXHAUSTED) 513 printf("TX buffers exhausted in mid frame\n"); 514 515 return wait_for_bit(__func__, ®s->txsr, ZYNQ_GEM_TSR_DONE, 516 true, 20000, true); 517 } 518 519 /* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */ 520 static int zynq_gem_recv(struct udevice *dev, int flags, uchar **packetp) 521 { 522 int frame_len; 523 u32 addr; 524 struct zynq_gem_priv *priv = dev_get_priv(dev); 525 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current]; 526 527 if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK)) 528 return -1; 529 530 if (!(current_bd->status & 531 (ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) { 532 printf("GEM: SOF or EOF not set for last buffer received!\n"); 533 return -1; 534 } 535 536 frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK; 537 if (!frame_len) { 538 printf("%s: Zero size packet?\n", __func__); 539 return -1; 540 } 541 542 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK; 543 addr &= ~(ARCH_DMA_MINALIGN - 1); 544 *packetp = (uchar *)(uintptr_t)addr; 545 546 return frame_len; 547 } 548 549 static int zynq_gem_free_pkt(struct udevice *dev, uchar *packet, int length) 550 { 551 struct zynq_gem_priv *priv = dev_get_priv(dev); 552 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current]; 553 struct emac_bd *first_bd; 554 555 if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK) { 556 priv->rx_first_buf = priv->rxbd_current; 557 } else { 558 current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK; 559 current_bd->status = 0xF0000000; /* FIXME */ 560 } 561 562 if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) { 563 first_bd = &priv->rx_bd[priv->rx_first_buf]; 564 first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK; 565 first_bd->status = 0xF0000000; 566 } 567 568 if ((++priv->rxbd_current) >= RX_BUF) 569 priv->rxbd_current = 0; 570 571 return 0; 572 } 573 574 static void zynq_gem_halt(struct udevice *dev) 575 { 576 struct zynq_gem_priv *priv = dev_get_priv(dev); 577 struct zynq_gem_regs *regs = priv->iobase; 578 579 clrsetbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | 580 ZYNQ_GEM_NWCTRL_TXEN_MASK, 0); 581 } 582 583 __weak int zynq_board_read_rom_ethaddr(unsigned char *ethaddr) 584 { 585 return -ENOSYS; 586 } 587 588 static int zynq_gem_read_rom_mac(struct udevice *dev) 589 { 590 int retval; 591 struct eth_pdata *pdata = dev_get_platdata(dev); 592 593 retval = zynq_board_read_rom_ethaddr(pdata->enetaddr); 594 if (retval == -ENOSYS) 595 retval = 0; 596 597 return retval; 598 } 599 600 static int zynq_gem_miiphy_read(struct mii_dev *bus, int addr, 601 int devad, int reg) 602 { 603 struct zynq_gem_priv *priv = bus->priv; 604 int ret; 605 u16 val; 606 607 ret = phyread(priv, addr, reg, &val); 608 debug("%s 0x%x, 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val, ret); 609 return val; 610 } 611 612 static int zynq_gem_miiphy_write(struct mii_dev *bus, int addr, int devad, 613 int reg, u16 value) 614 { 615 struct zynq_gem_priv *priv = bus->priv; 616 617 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, value); 618 return phywrite(priv, addr, reg, value); 619 } 620 621 static int zynq_gem_probe(struct udevice *dev) 622 { 623 void *bd_space; 624 struct zynq_gem_priv *priv = dev_get_priv(dev); 625 int ret; 626 627 /* Align rxbuffers to ARCH_DMA_MINALIGN */ 628 priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN); 629 memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN); 630 631 /* Align bd_space to MMU_SECTION_SHIFT */ 632 bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE); 633 mmu_set_region_dcache_behaviour((phys_addr_t)bd_space, 634 BD_SPACE, DCACHE_OFF); 635 636 /* Initialize the bd spaces for tx and rx bd's */ 637 priv->tx_bd = (struct emac_bd *)bd_space; 638 priv->rx_bd = (struct emac_bd *)((ulong)bd_space + BD_SEPRN_SPACE); 639 640 priv->bus = mdio_alloc(); 641 priv->bus->read = zynq_gem_miiphy_read; 642 priv->bus->write = zynq_gem_miiphy_write; 643 priv->bus->priv = priv; 644 strcpy(priv->bus->name, "gem"); 645 646 ret = mdio_register(priv->bus); 647 if (ret) 648 return ret; 649 650 return zynq_phy_init(dev); 651 } 652 653 static int zynq_gem_remove(struct udevice *dev) 654 { 655 struct zynq_gem_priv *priv = dev_get_priv(dev); 656 657 free(priv->phydev); 658 mdio_unregister(priv->bus); 659 mdio_free(priv->bus); 660 661 return 0; 662 } 663 664 static const struct eth_ops zynq_gem_ops = { 665 .start = zynq_gem_init, 666 .send = zynq_gem_send, 667 .recv = zynq_gem_recv, 668 .free_pkt = zynq_gem_free_pkt, 669 .stop = zynq_gem_halt, 670 .write_hwaddr = zynq_gem_setup_mac, 671 .read_rom_hwaddr = zynq_gem_read_rom_mac, 672 }; 673 674 static int zynq_gem_ofdata_to_platdata(struct udevice *dev) 675 { 676 struct eth_pdata *pdata = dev_get_platdata(dev); 677 struct zynq_gem_priv *priv = dev_get_priv(dev); 678 int offset = 0; 679 const char *phy_mode; 680 681 pdata->iobase = (phys_addr_t)dev_get_addr(dev); 682 priv->iobase = (struct zynq_gem_regs *)pdata->iobase; 683 /* Hardcode for now */ 684 priv->emio = 0; 685 priv->phyaddr = -1; 686 687 offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset, 688 "phy-handle"); 689 if (offset > 0) 690 priv->phyaddr = fdtdec_get_int(gd->fdt_blob, offset, "reg", -1); 691 692 phy_mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "phy-mode", NULL); 693 if (phy_mode) 694 pdata->phy_interface = phy_get_interface_by_name(phy_mode); 695 if (pdata->phy_interface == -1) { 696 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode); 697 return -EINVAL; 698 } 699 priv->interface = pdata->phy_interface; 700 701 priv->emio = fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "xlnx,emio"); 702 703 printf("ZYNQ GEM: %lx, phyaddr %d, interface %s\n", (ulong)priv->iobase, 704 priv->phyaddr, phy_string_for_interface(priv->interface)); 705 706 return 0; 707 } 708 709 static const struct udevice_id zynq_gem_ids[] = { 710 { .compatible = "cdns,zynqmp-gem" }, 711 { .compatible = "cdns,zynq-gem" }, 712 { .compatible = "cdns,gem" }, 713 { } 714 }; 715 716 U_BOOT_DRIVER(zynq_gem) = { 717 .name = "zynq_gem", 718 .id = UCLASS_ETH, 719 .of_match = zynq_gem_ids, 720 .ofdata_to_platdata = zynq_gem_ofdata_to_platdata, 721 .probe = zynq_gem_probe, 722 .remove = zynq_gem_remove, 723 .ops = &zynq_gem_ops, 724 .priv_auto_alloc_size = sizeof(struct zynq_gem_priv), 725 .platdata_auto_alloc_size = sizeof(struct eth_pdata), 726 }; 727