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 <linux/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 int phy_of_handle; 183 struct mii_dev *bus; 184 }; 185 186 static inline int mdio_wait(struct zynq_gem_regs *regs) 187 { 188 u32 timeout = 20000; 189 190 /* Wait till MDIO interface is ready to accept a new transaction. */ 191 while (--timeout) { 192 if (readl(®s->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK) 193 break; 194 WATCHDOG_RESET(); 195 } 196 197 if (!timeout) { 198 printf("%s: Timeout\n", __func__); 199 return 1; 200 } 201 202 return 0; 203 } 204 205 static u32 phy_setup_op(struct zynq_gem_priv *priv, u32 phy_addr, u32 regnum, 206 u32 op, u16 *data) 207 { 208 u32 mgtcr; 209 struct zynq_gem_regs *regs = priv->iobase; 210 211 if (mdio_wait(regs)) 212 return 1; 213 214 /* Construct mgtcr mask for the operation */ 215 mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op | 216 (phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) | 217 (regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data; 218 219 /* Write mgtcr and wait for completion */ 220 writel(mgtcr, ®s->phymntnc); 221 222 if (mdio_wait(regs)) 223 return 1; 224 225 if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK) 226 *data = readl(®s->phymntnc); 227 228 return 0; 229 } 230 231 static u32 phyread(struct zynq_gem_priv *priv, u32 phy_addr, 232 u32 regnum, u16 *val) 233 { 234 u32 ret; 235 236 ret = phy_setup_op(priv, phy_addr, regnum, 237 ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val); 238 239 if (!ret) 240 debug("%s: phy_addr %d, regnum 0x%x, val 0x%x\n", __func__, 241 phy_addr, regnum, *val); 242 243 return ret; 244 } 245 246 static u32 phywrite(struct zynq_gem_priv *priv, u32 phy_addr, 247 u32 regnum, u16 data) 248 { 249 debug("%s: phy_addr %d, regnum 0x%x, data 0x%x\n", __func__, phy_addr, 250 regnum, data); 251 252 return phy_setup_op(priv, phy_addr, regnum, 253 ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data); 254 } 255 256 static int phy_detection(struct udevice *dev) 257 { 258 int i; 259 u16 phyreg; 260 struct zynq_gem_priv *priv = dev->priv; 261 262 if (priv->phyaddr != -1) { 263 phyread(priv, priv->phyaddr, PHY_DETECT_REG, &phyreg); 264 if ((phyreg != 0xFFFF) && 265 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { 266 /* Found a valid PHY address */ 267 debug("Default phy address %d is valid\n", 268 priv->phyaddr); 269 return 0; 270 } else { 271 debug("PHY address is not setup correctly %d\n", 272 priv->phyaddr); 273 priv->phyaddr = -1; 274 } 275 } 276 277 debug("detecting phy address\n"); 278 if (priv->phyaddr == -1) { 279 /* detect the PHY address */ 280 for (i = 31; i >= 0; i--) { 281 phyread(priv, i, PHY_DETECT_REG, &phyreg); 282 if ((phyreg != 0xFFFF) && 283 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { 284 /* Found a valid PHY address */ 285 priv->phyaddr = i; 286 debug("Found valid phy address, %d\n", i); 287 return 0; 288 } 289 } 290 } 291 printf("PHY is not detected\n"); 292 return -1; 293 } 294 295 static int zynq_gem_setup_mac(struct udevice *dev) 296 { 297 u32 i, macaddrlow, macaddrhigh; 298 struct eth_pdata *pdata = dev_get_platdata(dev); 299 struct zynq_gem_priv *priv = dev_get_priv(dev); 300 struct zynq_gem_regs *regs = priv->iobase; 301 302 /* Set the MAC bits [31:0] in BOT */ 303 macaddrlow = pdata->enetaddr[0]; 304 macaddrlow |= pdata->enetaddr[1] << 8; 305 macaddrlow |= pdata->enetaddr[2] << 16; 306 macaddrlow |= pdata->enetaddr[3] << 24; 307 308 /* Set MAC bits [47:32] in TOP */ 309 macaddrhigh = pdata->enetaddr[4]; 310 macaddrhigh |= pdata->enetaddr[5] << 8; 311 312 for (i = 0; i < 4; i++) { 313 writel(0, ®s->laddr[i][LADDR_LOW]); 314 writel(0, ®s->laddr[i][LADDR_HIGH]); 315 /* Do not use MATCHx register */ 316 writel(0, ®s->match[i]); 317 } 318 319 writel(macaddrlow, ®s->laddr[0][LADDR_LOW]); 320 writel(macaddrhigh, ®s->laddr[0][LADDR_HIGH]); 321 322 return 0; 323 } 324 325 static int zynq_phy_init(struct udevice *dev) 326 { 327 int ret; 328 struct zynq_gem_priv *priv = dev_get_priv(dev); 329 struct zynq_gem_regs *regs = priv->iobase; 330 const u32 supported = SUPPORTED_10baseT_Half | 331 SUPPORTED_10baseT_Full | 332 SUPPORTED_100baseT_Half | 333 SUPPORTED_100baseT_Full | 334 SUPPORTED_1000baseT_Half | 335 SUPPORTED_1000baseT_Full; 336 337 /* Enable only MDIO bus */ 338 writel(ZYNQ_GEM_NWCTRL_MDEN_MASK, ®s->nwctrl); 339 340 if (priv->interface != PHY_INTERFACE_MODE_SGMII) { 341 ret = phy_detection(dev); 342 if (ret) { 343 printf("GEM PHY init failed\n"); 344 return ret; 345 } 346 } 347 348 priv->phydev = phy_connect(priv->bus, priv->phyaddr, dev, 349 priv->interface); 350 if (!priv->phydev) 351 return -ENODEV; 352 353 priv->phydev->supported = supported | ADVERTISED_Pause | 354 ADVERTISED_Asym_Pause; 355 priv->phydev->advertising = priv->phydev->supported; 356 357 if (priv->phy_of_handle > 0) 358 priv->phydev->dev->of_offset = priv->phy_of_handle; 359 360 return phy_config(priv->phydev); 361 } 362 363 static int zynq_gem_init(struct udevice *dev) 364 { 365 u32 i, nwconfig; 366 int ret; 367 unsigned long clk_rate = 0; 368 struct zynq_gem_priv *priv = dev_get_priv(dev); 369 struct zynq_gem_regs *regs = priv->iobase; 370 struct emac_bd *dummy_tx_bd = &priv->tx_bd[TX_FREE_DESC]; 371 struct emac_bd *dummy_rx_bd = &priv->tx_bd[TX_FREE_DESC + 2]; 372 373 if (!priv->init) { 374 /* Disable all interrupts */ 375 writel(0xFFFFFFFF, ®s->idr); 376 377 /* Disable the receiver & transmitter */ 378 writel(0, ®s->nwctrl); 379 writel(0, ®s->txsr); 380 writel(0, ®s->rxsr); 381 writel(0, ®s->phymntnc); 382 383 /* Clear the Hash registers for the mac address 384 * pointed by AddressPtr 385 */ 386 writel(0x0, ®s->hashl); 387 /* Write bits [63:32] in TOP */ 388 writel(0x0, ®s->hashh); 389 390 /* Clear all counters */ 391 for (i = 0; i < STAT_SIZE; i++) 392 readl(®s->stat[i]); 393 394 /* Setup RxBD space */ 395 memset(priv->rx_bd, 0, RX_BUF * sizeof(struct emac_bd)); 396 397 for (i = 0; i < RX_BUF; i++) { 398 priv->rx_bd[i].status = 0xF0000000; 399 priv->rx_bd[i].addr = 400 ((ulong)(priv->rxbuffers) + 401 (i * PKTSIZE_ALIGN)); 402 } 403 /* WRAP bit to last BD */ 404 priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK; 405 /* Write RxBDs to IP */ 406 writel((ulong)priv->rx_bd, ®s->rxqbase); 407 408 /* Setup for DMA Configuration register */ 409 writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr); 410 411 /* Setup for Network Control register, MDIO, Rx and Tx enable */ 412 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK); 413 414 /* Disable the second priority queue */ 415 dummy_tx_bd->addr = 0; 416 dummy_tx_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK | 417 ZYNQ_GEM_TXBUF_LAST_MASK| 418 ZYNQ_GEM_TXBUF_USED_MASK; 419 420 dummy_rx_bd->addr = ZYNQ_GEM_RXBUF_WRAP_MASK | 421 ZYNQ_GEM_RXBUF_NEW_MASK; 422 dummy_rx_bd->status = 0; 423 flush_dcache_range((ulong)&dummy_tx_bd, (ulong)&dummy_tx_bd + 424 sizeof(dummy_tx_bd)); 425 flush_dcache_range((ulong)&dummy_rx_bd, (ulong)&dummy_rx_bd + 426 sizeof(dummy_rx_bd)); 427 428 writel((ulong)dummy_tx_bd, ®s->transmit_q1_ptr); 429 writel((ulong)dummy_rx_bd, ®s->receive_q1_ptr); 430 431 priv->init++; 432 } 433 434 ret = phy_startup(priv->phydev); 435 if (ret) 436 return ret; 437 438 if (!priv->phydev->link) { 439 printf("%s: No link.\n", priv->phydev->dev->name); 440 return -1; 441 } 442 443 nwconfig = ZYNQ_GEM_NWCFG_INIT; 444 445 if (priv->interface == PHY_INTERFACE_MODE_SGMII) { 446 nwconfig |= ZYNQ_GEM_NWCFG_SGMII_ENBL | 447 ZYNQ_GEM_NWCFG_PCS_SEL; 448 #ifdef CONFIG_ARM64 449 writel(readl(®s->pcscntrl) | ZYNQ_GEM_PCS_CTL_ANEG_ENBL, 450 ®s->pcscntrl); 451 #endif 452 } 453 454 switch (priv->phydev->speed) { 455 case SPEED_1000: 456 writel(nwconfig | ZYNQ_GEM_NWCFG_SPEED1000, 457 ®s->nwcfg); 458 clk_rate = ZYNQ_GEM_FREQUENCY_1000; 459 break; 460 case SPEED_100: 461 writel(nwconfig | ZYNQ_GEM_NWCFG_SPEED100, 462 ®s->nwcfg); 463 clk_rate = ZYNQ_GEM_FREQUENCY_100; 464 break; 465 case SPEED_10: 466 clk_rate = ZYNQ_GEM_FREQUENCY_10; 467 break; 468 } 469 470 /* Change the rclk and clk only not using EMIO interface */ 471 if (!priv->emio) 472 zynq_slcr_gem_clk_setup((ulong)priv->iobase != 473 ZYNQ_GEM_BASEADDR0, clk_rate); 474 475 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | 476 ZYNQ_GEM_NWCTRL_TXEN_MASK); 477 478 return 0; 479 } 480 481 static int zynq_gem_send(struct udevice *dev, void *ptr, int len) 482 { 483 u32 addr, size; 484 struct zynq_gem_priv *priv = dev_get_priv(dev); 485 struct zynq_gem_regs *regs = priv->iobase; 486 struct emac_bd *current_bd = &priv->tx_bd[1]; 487 488 /* Setup Tx BD */ 489 memset(priv->tx_bd, 0, sizeof(struct emac_bd)); 490 491 priv->tx_bd->addr = (ulong)ptr; 492 priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) | 493 ZYNQ_GEM_TXBUF_LAST_MASK; 494 /* Dummy descriptor to mark it as the last in descriptor chain */ 495 current_bd->addr = 0x0; 496 current_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK | 497 ZYNQ_GEM_TXBUF_LAST_MASK| 498 ZYNQ_GEM_TXBUF_USED_MASK; 499 500 /* setup BD */ 501 writel((ulong)priv->tx_bd, ®s->txqbase); 502 503 addr = (ulong) ptr; 504 addr &= ~(ARCH_DMA_MINALIGN - 1); 505 size = roundup(len, ARCH_DMA_MINALIGN); 506 flush_dcache_range(addr, addr + size); 507 508 addr = (ulong)priv->rxbuffers; 509 addr &= ~(ARCH_DMA_MINALIGN - 1); 510 size = roundup((RX_BUF * PKTSIZE_ALIGN), ARCH_DMA_MINALIGN); 511 flush_dcache_range(addr, addr + size); 512 barrier(); 513 514 /* Start transmit */ 515 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK); 516 517 /* Read TX BD status */ 518 if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_EXHAUSTED) 519 printf("TX buffers exhausted in mid frame\n"); 520 521 return wait_for_bit(__func__, ®s->txsr, ZYNQ_GEM_TSR_DONE, 522 true, 20000, true); 523 } 524 525 /* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */ 526 static int zynq_gem_recv(struct udevice *dev, int flags, uchar **packetp) 527 { 528 int frame_len; 529 u32 addr; 530 struct zynq_gem_priv *priv = dev_get_priv(dev); 531 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current]; 532 533 if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK)) 534 return -1; 535 536 if (!(current_bd->status & 537 (ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) { 538 printf("GEM: SOF or EOF not set for last buffer received!\n"); 539 return -1; 540 } 541 542 frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK; 543 if (!frame_len) { 544 printf("%s: Zero size packet?\n", __func__); 545 return -1; 546 } 547 548 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK; 549 addr &= ~(ARCH_DMA_MINALIGN - 1); 550 *packetp = (uchar *)(uintptr_t)addr; 551 552 return frame_len; 553 } 554 555 static int zynq_gem_free_pkt(struct udevice *dev, uchar *packet, int length) 556 { 557 struct zynq_gem_priv *priv = dev_get_priv(dev); 558 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current]; 559 struct emac_bd *first_bd; 560 561 if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK) { 562 priv->rx_first_buf = priv->rxbd_current; 563 } else { 564 current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK; 565 current_bd->status = 0xF0000000; /* FIXME */ 566 } 567 568 if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) { 569 first_bd = &priv->rx_bd[priv->rx_first_buf]; 570 first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK; 571 first_bd->status = 0xF0000000; 572 } 573 574 if ((++priv->rxbd_current) >= RX_BUF) 575 priv->rxbd_current = 0; 576 577 return 0; 578 } 579 580 static void zynq_gem_halt(struct udevice *dev) 581 { 582 struct zynq_gem_priv *priv = dev_get_priv(dev); 583 struct zynq_gem_regs *regs = priv->iobase; 584 585 clrsetbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | 586 ZYNQ_GEM_NWCTRL_TXEN_MASK, 0); 587 } 588 589 __weak int zynq_board_read_rom_ethaddr(unsigned char *ethaddr) 590 { 591 return -ENOSYS; 592 } 593 594 static int zynq_gem_read_rom_mac(struct udevice *dev) 595 { 596 int retval; 597 struct eth_pdata *pdata = dev_get_platdata(dev); 598 599 retval = zynq_board_read_rom_ethaddr(pdata->enetaddr); 600 if (retval == -ENOSYS) 601 retval = 0; 602 603 return retval; 604 } 605 606 static int zynq_gem_miiphy_read(struct mii_dev *bus, int addr, 607 int devad, int reg) 608 { 609 struct zynq_gem_priv *priv = bus->priv; 610 int ret; 611 u16 val; 612 613 ret = phyread(priv, addr, reg, &val); 614 debug("%s 0x%x, 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val, ret); 615 return val; 616 } 617 618 static int zynq_gem_miiphy_write(struct mii_dev *bus, int addr, int devad, 619 int reg, u16 value) 620 { 621 struct zynq_gem_priv *priv = bus->priv; 622 623 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, value); 624 return phywrite(priv, addr, reg, value); 625 } 626 627 static int zynq_gem_probe(struct udevice *dev) 628 { 629 void *bd_space; 630 struct zynq_gem_priv *priv = dev_get_priv(dev); 631 int ret; 632 633 /* Align rxbuffers to ARCH_DMA_MINALIGN */ 634 priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN); 635 memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN); 636 637 /* Align bd_space to MMU_SECTION_SHIFT */ 638 bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE); 639 mmu_set_region_dcache_behaviour((phys_addr_t)bd_space, 640 BD_SPACE, DCACHE_OFF); 641 642 /* Initialize the bd spaces for tx and rx bd's */ 643 priv->tx_bd = (struct emac_bd *)bd_space; 644 priv->rx_bd = (struct emac_bd *)((ulong)bd_space + BD_SEPRN_SPACE); 645 646 priv->bus = mdio_alloc(); 647 priv->bus->read = zynq_gem_miiphy_read; 648 priv->bus->write = zynq_gem_miiphy_write; 649 priv->bus->priv = priv; 650 strcpy(priv->bus->name, "gem"); 651 652 ret = mdio_register(priv->bus); 653 if (ret) 654 return ret; 655 656 return zynq_phy_init(dev); 657 } 658 659 static int zynq_gem_remove(struct udevice *dev) 660 { 661 struct zynq_gem_priv *priv = dev_get_priv(dev); 662 663 free(priv->phydev); 664 mdio_unregister(priv->bus); 665 mdio_free(priv->bus); 666 667 return 0; 668 } 669 670 static const struct eth_ops zynq_gem_ops = { 671 .start = zynq_gem_init, 672 .send = zynq_gem_send, 673 .recv = zynq_gem_recv, 674 .free_pkt = zynq_gem_free_pkt, 675 .stop = zynq_gem_halt, 676 .write_hwaddr = zynq_gem_setup_mac, 677 .read_rom_hwaddr = zynq_gem_read_rom_mac, 678 }; 679 680 static int zynq_gem_ofdata_to_platdata(struct udevice *dev) 681 { 682 struct eth_pdata *pdata = dev_get_platdata(dev); 683 struct zynq_gem_priv *priv = dev_get_priv(dev); 684 const char *phy_mode; 685 686 pdata->iobase = (phys_addr_t)dev_get_addr(dev); 687 priv->iobase = (struct zynq_gem_regs *)pdata->iobase; 688 /* Hardcode for now */ 689 priv->emio = 0; 690 priv->phyaddr = -1; 691 692 priv->phy_of_handle = fdtdec_lookup_phandle(gd->fdt_blob, 693 dev->of_offset, "phy-handle"); 694 if (priv->phy_of_handle > 0) 695 priv->phyaddr = fdtdec_get_int(gd->fdt_blob, 696 priv->phy_of_handle, "reg", -1); 697 698 phy_mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "phy-mode", NULL); 699 if (phy_mode) 700 pdata->phy_interface = phy_get_interface_by_name(phy_mode); 701 if (pdata->phy_interface == -1) { 702 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode); 703 return -EINVAL; 704 } 705 priv->interface = pdata->phy_interface; 706 707 priv->emio = fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "xlnx,emio"); 708 709 printf("ZYNQ GEM: %lx, phyaddr %d, interface %s\n", (ulong)priv->iobase, 710 priv->phyaddr, phy_string_for_interface(priv->interface)); 711 712 return 0; 713 } 714 715 static const struct udevice_id zynq_gem_ids[] = { 716 { .compatible = "cdns,zynqmp-gem" }, 717 { .compatible = "cdns,zynq-gem" }, 718 { .compatible = "cdns,gem" }, 719 { } 720 }; 721 722 U_BOOT_DRIVER(zynq_gem) = { 723 .name = "zynq_gem", 724 .id = UCLASS_ETH, 725 .of_match = zynq_gem_ids, 726 .ofdata_to_platdata = zynq_gem_ofdata_to_platdata, 727 .probe = zynq_gem_probe, 728 .remove = zynq_gem_remove, 729 .ops = &zynq_gem_ops, 730 .priv_auto_alloc_size = sizeof(struct zynq_gem_priv), 731 .platdata_auto_alloc_size = sizeof(struct eth_pdata), 732 }; 733