1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Ethernet driver for the WIZnet W5100 chip. 4 * 5 * Copyright (C) 2006-2008 WIZnet Co.,Ltd. 6 * Copyright (C) 2012 Mike Sinkovsky <msink@permonline.ru> 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/module.h> 11 #include <linux/netdevice.h> 12 #include <linux/etherdevice.h> 13 #include <linux/platform_device.h> 14 #include <linux/platform_data/wiznet.h> 15 #include <linux/ethtool.h> 16 #include <linux/skbuff.h> 17 #include <linux/types.h> 18 #include <linux/errno.h> 19 #include <linux/delay.h> 20 #include <linux/slab.h> 21 #include <linux/spinlock.h> 22 #include <linux/io.h> 23 #include <linux/ioport.h> 24 #include <linux/interrupt.h> 25 #include <linux/irq.h> 26 #include <linux/gpio.h> 27 28 #include "w5100.h" 29 30 #define DRV_NAME "w5100" 31 #define DRV_VERSION "2012-04-04" 32 33 MODULE_DESCRIPTION("WIZnet W5100 Ethernet driver v"DRV_VERSION); 34 MODULE_AUTHOR("Mike Sinkovsky <msink@permonline.ru>"); 35 MODULE_ALIAS("platform:"DRV_NAME); 36 MODULE_LICENSE("GPL"); 37 38 /* 39 * W5100/W5200/W5500 common registers 40 */ 41 #define W5100_COMMON_REGS 0x0000 42 #define W5100_MR 0x0000 /* Mode Register */ 43 #define MR_RST 0x80 /* S/W reset */ 44 #define MR_PB 0x10 /* Ping block */ 45 #define MR_AI 0x02 /* Address Auto-Increment */ 46 #define MR_IND 0x01 /* Indirect mode */ 47 #define W5100_SHAR 0x0009 /* Source MAC address */ 48 #define W5100_IR 0x0015 /* Interrupt Register */ 49 #define W5100_COMMON_REGS_LEN 0x0040 50 51 #define W5100_Sn_MR 0x0000 /* Sn Mode Register */ 52 #define W5100_Sn_CR 0x0001 /* Sn Command Register */ 53 #define W5100_Sn_IR 0x0002 /* Sn Interrupt Register */ 54 #define W5100_Sn_SR 0x0003 /* Sn Status Register */ 55 #define W5100_Sn_TX_FSR 0x0020 /* Sn Transmit free memory size */ 56 #define W5100_Sn_TX_RD 0x0022 /* Sn Transmit memory read pointer */ 57 #define W5100_Sn_TX_WR 0x0024 /* Sn Transmit memory write pointer */ 58 #define W5100_Sn_RX_RSR 0x0026 /* Sn Receive free memory size */ 59 #define W5100_Sn_RX_RD 0x0028 /* Sn Receive memory read pointer */ 60 61 #define S0_REGS(priv) ((priv)->s0_regs) 62 63 #define W5100_S0_MR(priv) (S0_REGS(priv) + W5100_Sn_MR) 64 #define S0_MR_MACRAW 0x04 /* MAC RAW mode */ 65 #define S0_MR_MF 0x40 /* MAC Filter for W5100 and W5200 */ 66 #define W5500_S0_MR_MF 0x80 /* MAC Filter for W5500 */ 67 #define W5100_S0_CR(priv) (S0_REGS(priv) + W5100_Sn_CR) 68 #define S0_CR_OPEN 0x01 /* OPEN command */ 69 #define S0_CR_CLOSE 0x10 /* CLOSE command */ 70 #define S0_CR_SEND 0x20 /* SEND command */ 71 #define S0_CR_RECV 0x40 /* RECV command */ 72 #define W5100_S0_IR(priv) (S0_REGS(priv) + W5100_Sn_IR) 73 #define S0_IR_SENDOK 0x10 /* complete sending */ 74 #define S0_IR_RECV 0x04 /* receiving data */ 75 #define W5100_S0_SR(priv) (S0_REGS(priv) + W5100_Sn_SR) 76 #define S0_SR_MACRAW 0x42 /* mac raw mode */ 77 #define W5100_S0_TX_FSR(priv) (S0_REGS(priv) + W5100_Sn_TX_FSR) 78 #define W5100_S0_TX_RD(priv) (S0_REGS(priv) + W5100_Sn_TX_RD) 79 #define W5100_S0_TX_WR(priv) (S0_REGS(priv) + W5100_Sn_TX_WR) 80 #define W5100_S0_RX_RSR(priv) (S0_REGS(priv) + W5100_Sn_RX_RSR) 81 #define W5100_S0_RX_RD(priv) (S0_REGS(priv) + W5100_Sn_RX_RD) 82 83 #define W5100_S0_REGS_LEN 0x0040 84 85 /* 86 * W5100 and W5200 common registers 87 */ 88 #define W5100_IMR 0x0016 /* Interrupt Mask Register */ 89 #define IR_S0 0x01 /* S0 interrupt */ 90 #define W5100_RTR 0x0017 /* Retry Time-value Register */ 91 #define RTR_DEFAULT 2000 /* =0x07d0 (2000) */ 92 93 /* 94 * W5100 specific register and memory 95 */ 96 #define W5100_RMSR 0x001a /* Receive Memory Size */ 97 #define W5100_TMSR 0x001b /* Transmit Memory Size */ 98 99 #define W5100_S0_REGS 0x0400 100 101 #define W5100_TX_MEM_START 0x4000 102 #define W5100_TX_MEM_SIZE 0x2000 103 #define W5100_RX_MEM_START 0x6000 104 #define W5100_RX_MEM_SIZE 0x2000 105 106 /* 107 * W5200 specific register and memory 108 */ 109 #define W5200_S0_REGS 0x4000 110 111 #define W5200_Sn_RXMEM_SIZE(n) (0x401e + (n) * 0x0100) /* Sn RX Memory Size */ 112 #define W5200_Sn_TXMEM_SIZE(n) (0x401f + (n) * 0x0100) /* Sn TX Memory Size */ 113 114 #define W5200_TX_MEM_START 0x8000 115 #define W5200_TX_MEM_SIZE 0x4000 116 #define W5200_RX_MEM_START 0xc000 117 #define W5200_RX_MEM_SIZE 0x4000 118 119 /* 120 * W5500 specific register and memory 121 * 122 * W5500 register and memory are organized by multiple blocks. Each one is 123 * selected by 16bits offset address and 5bits block select bits. So we 124 * encode it into 32bits address. (lower 16bits is offset address and 125 * upper 16bits is block select bits) 126 */ 127 #define W5500_SIMR 0x0018 /* Socket Interrupt Mask Register */ 128 #define W5500_RTR 0x0019 /* Retry Time-value Register */ 129 130 #define W5500_S0_REGS 0x10000 131 132 #define W5500_Sn_RXMEM_SIZE(n) \ 133 (0x1001e + (n) * 0x40000) /* Sn RX Memory Size */ 134 #define W5500_Sn_TXMEM_SIZE(n) \ 135 (0x1001f + (n) * 0x40000) /* Sn TX Memory Size */ 136 137 #define W5500_TX_MEM_START 0x20000 138 #define W5500_TX_MEM_SIZE 0x04000 139 #define W5500_RX_MEM_START 0x30000 140 #define W5500_RX_MEM_SIZE 0x04000 141 142 /* 143 * Device driver private data structure 144 */ 145 146 struct w5100_priv { 147 const struct w5100_ops *ops; 148 149 /* Socket 0 register offset address */ 150 u32 s0_regs; 151 /* Socket 0 TX buffer offset address and size */ 152 u32 s0_tx_buf; 153 u16 s0_tx_buf_size; 154 /* Socket 0 RX buffer offset address and size */ 155 u32 s0_rx_buf; 156 u16 s0_rx_buf_size; 157 158 int irq; 159 int link_irq; 160 int link_gpio; 161 162 struct napi_struct napi; 163 struct net_device *ndev; 164 bool promisc; 165 u32 msg_enable; 166 167 struct workqueue_struct *xfer_wq; 168 struct work_struct rx_work; 169 struct sk_buff *tx_skb; 170 struct work_struct tx_work; 171 struct work_struct setrx_work; 172 struct work_struct restart_work; 173 }; 174 175 /************************************************************************ 176 * 177 * Lowlevel I/O functions 178 * 179 ***********************************************************************/ 180 181 struct w5100_mmio_priv { 182 void __iomem *base; 183 /* Serialize access in indirect address mode */ 184 spinlock_t reg_lock; 185 }; 186 187 static inline struct w5100_mmio_priv *w5100_mmio_priv(struct net_device *dev) 188 { 189 return w5100_ops_priv(dev); 190 } 191 192 static inline void __iomem *w5100_mmio(struct net_device *ndev) 193 { 194 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 195 196 return mmio_priv->base; 197 } 198 199 /* 200 * In direct address mode host system can directly access W5100 registers 201 * after mapping to Memory-Mapped I/O space. 202 * 203 * 0x8000 bytes are required for memory space. 204 */ 205 static inline int w5100_read_direct(struct net_device *ndev, u32 addr) 206 { 207 return ioread8(w5100_mmio(ndev) + (addr << CONFIG_WIZNET_BUS_SHIFT)); 208 } 209 210 static inline int __w5100_write_direct(struct net_device *ndev, u32 addr, 211 u8 data) 212 { 213 iowrite8(data, w5100_mmio(ndev) + (addr << CONFIG_WIZNET_BUS_SHIFT)); 214 215 return 0; 216 } 217 218 static inline int w5100_write_direct(struct net_device *ndev, u32 addr, u8 data) 219 { 220 __w5100_write_direct(ndev, addr, data); 221 222 return 0; 223 } 224 225 static int w5100_read16_direct(struct net_device *ndev, u32 addr) 226 { 227 u16 data; 228 data = w5100_read_direct(ndev, addr) << 8; 229 data |= w5100_read_direct(ndev, addr + 1); 230 return data; 231 } 232 233 static int w5100_write16_direct(struct net_device *ndev, u32 addr, u16 data) 234 { 235 __w5100_write_direct(ndev, addr, data >> 8); 236 __w5100_write_direct(ndev, addr + 1, data); 237 238 return 0; 239 } 240 241 static int w5100_readbulk_direct(struct net_device *ndev, u32 addr, u8 *buf, 242 int len) 243 { 244 int i; 245 246 for (i = 0; i < len; i++, addr++) 247 *buf++ = w5100_read_direct(ndev, addr); 248 249 return 0; 250 } 251 252 static int w5100_writebulk_direct(struct net_device *ndev, u32 addr, 253 const u8 *buf, int len) 254 { 255 int i; 256 257 for (i = 0; i < len; i++, addr++) 258 __w5100_write_direct(ndev, addr, *buf++); 259 260 return 0; 261 } 262 263 static int w5100_mmio_init(struct net_device *ndev) 264 { 265 struct platform_device *pdev = to_platform_device(ndev->dev.parent); 266 struct w5100_priv *priv = netdev_priv(ndev); 267 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 268 struct resource *mem; 269 270 spin_lock_init(&mmio_priv->reg_lock); 271 272 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 273 mmio_priv->base = devm_ioremap_resource(&pdev->dev, mem); 274 if (IS_ERR(mmio_priv->base)) 275 return PTR_ERR(mmio_priv->base); 276 277 netdev_info(ndev, "at 0x%llx irq %d\n", (u64)mem->start, priv->irq); 278 279 return 0; 280 } 281 282 static const struct w5100_ops w5100_mmio_direct_ops = { 283 .chip_id = W5100, 284 .read = w5100_read_direct, 285 .write = w5100_write_direct, 286 .read16 = w5100_read16_direct, 287 .write16 = w5100_write16_direct, 288 .readbulk = w5100_readbulk_direct, 289 .writebulk = w5100_writebulk_direct, 290 .init = w5100_mmio_init, 291 }; 292 293 /* 294 * In indirect address mode host system indirectly accesses registers by 295 * using Indirect Mode Address Register (IDM_AR) and Indirect Mode Data 296 * Register (IDM_DR), which are directly mapped to Memory-Mapped I/O space. 297 * Mode Register (MR) is directly accessible. 298 * 299 * Only 0x04 bytes are required for memory space. 300 */ 301 #define W5100_IDM_AR 0x01 /* Indirect Mode Address Register */ 302 #define W5100_IDM_DR 0x03 /* Indirect Mode Data Register */ 303 304 static int w5100_read_indirect(struct net_device *ndev, u32 addr) 305 { 306 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 307 unsigned long flags; 308 u8 data; 309 310 spin_lock_irqsave(&mmio_priv->reg_lock, flags); 311 w5100_write16_direct(ndev, W5100_IDM_AR, addr); 312 data = w5100_read_direct(ndev, W5100_IDM_DR); 313 spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); 314 315 return data; 316 } 317 318 static int w5100_write_indirect(struct net_device *ndev, u32 addr, u8 data) 319 { 320 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 321 unsigned long flags; 322 323 spin_lock_irqsave(&mmio_priv->reg_lock, flags); 324 w5100_write16_direct(ndev, W5100_IDM_AR, addr); 325 w5100_write_direct(ndev, W5100_IDM_DR, data); 326 spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); 327 328 return 0; 329 } 330 331 static int w5100_read16_indirect(struct net_device *ndev, u32 addr) 332 { 333 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 334 unsigned long flags; 335 u16 data; 336 337 spin_lock_irqsave(&mmio_priv->reg_lock, flags); 338 w5100_write16_direct(ndev, W5100_IDM_AR, addr); 339 data = w5100_read_direct(ndev, W5100_IDM_DR) << 8; 340 data |= w5100_read_direct(ndev, W5100_IDM_DR); 341 spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); 342 343 return data; 344 } 345 346 static int w5100_write16_indirect(struct net_device *ndev, u32 addr, u16 data) 347 { 348 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 349 unsigned long flags; 350 351 spin_lock_irqsave(&mmio_priv->reg_lock, flags); 352 w5100_write16_direct(ndev, W5100_IDM_AR, addr); 353 __w5100_write_direct(ndev, W5100_IDM_DR, data >> 8); 354 w5100_write_direct(ndev, W5100_IDM_DR, data); 355 spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); 356 357 return 0; 358 } 359 360 static int w5100_readbulk_indirect(struct net_device *ndev, u32 addr, u8 *buf, 361 int len) 362 { 363 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 364 unsigned long flags; 365 int i; 366 367 spin_lock_irqsave(&mmio_priv->reg_lock, flags); 368 w5100_write16_direct(ndev, W5100_IDM_AR, addr); 369 370 for (i = 0; i < len; i++) 371 *buf++ = w5100_read_direct(ndev, W5100_IDM_DR); 372 373 spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); 374 375 return 0; 376 } 377 378 static int w5100_writebulk_indirect(struct net_device *ndev, u32 addr, 379 const u8 *buf, int len) 380 { 381 struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); 382 unsigned long flags; 383 int i; 384 385 spin_lock_irqsave(&mmio_priv->reg_lock, flags); 386 w5100_write16_direct(ndev, W5100_IDM_AR, addr); 387 388 for (i = 0; i < len; i++) 389 __w5100_write_direct(ndev, W5100_IDM_DR, *buf++); 390 391 spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); 392 393 return 0; 394 } 395 396 static int w5100_reset_indirect(struct net_device *ndev) 397 { 398 w5100_write_direct(ndev, W5100_MR, MR_RST); 399 mdelay(5); 400 w5100_write_direct(ndev, W5100_MR, MR_PB | MR_AI | MR_IND); 401 402 return 0; 403 } 404 405 static const struct w5100_ops w5100_mmio_indirect_ops = { 406 .chip_id = W5100, 407 .read = w5100_read_indirect, 408 .write = w5100_write_indirect, 409 .read16 = w5100_read16_indirect, 410 .write16 = w5100_write16_indirect, 411 .readbulk = w5100_readbulk_indirect, 412 .writebulk = w5100_writebulk_indirect, 413 .init = w5100_mmio_init, 414 .reset = w5100_reset_indirect, 415 }; 416 417 #if defined(CONFIG_WIZNET_BUS_DIRECT) 418 419 static int w5100_read(struct w5100_priv *priv, u32 addr) 420 { 421 return w5100_read_direct(priv->ndev, addr); 422 } 423 424 static int w5100_write(struct w5100_priv *priv, u32 addr, u8 data) 425 { 426 return w5100_write_direct(priv->ndev, addr, data); 427 } 428 429 static int w5100_read16(struct w5100_priv *priv, u32 addr) 430 { 431 return w5100_read16_direct(priv->ndev, addr); 432 } 433 434 static int w5100_write16(struct w5100_priv *priv, u32 addr, u16 data) 435 { 436 return w5100_write16_direct(priv->ndev, addr, data); 437 } 438 439 static int w5100_readbulk(struct w5100_priv *priv, u32 addr, u8 *buf, int len) 440 { 441 return w5100_readbulk_direct(priv->ndev, addr, buf, len); 442 } 443 444 static int w5100_writebulk(struct w5100_priv *priv, u32 addr, const u8 *buf, 445 int len) 446 { 447 return w5100_writebulk_direct(priv->ndev, addr, buf, len); 448 } 449 450 #elif defined(CONFIG_WIZNET_BUS_INDIRECT) 451 452 static int w5100_read(struct w5100_priv *priv, u32 addr) 453 { 454 return w5100_read_indirect(priv->ndev, addr); 455 } 456 457 static int w5100_write(struct w5100_priv *priv, u32 addr, u8 data) 458 { 459 return w5100_write_indirect(priv->ndev, addr, data); 460 } 461 462 static int w5100_read16(struct w5100_priv *priv, u32 addr) 463 { 464 return w5100_read16_indirect(priv->ndev, addr); 465 } 466 467 static int w5100_write16(struct w5100_priv *priv, u32 addr, u16 data) 468 { 469 return w5100_write16_indirect(priv->ndev, addr, data); 470 } 471 472 static int w5100_readbulk(struct w5100_priv *priv, u32 addr, u8 *buf, int len) 473 { 474 return w5100_readbulk_indirect(priv->ndev, addr, buf, len); 475 } 476 477 static int w5100_writebulk(struct w5100_priv *priv, u32 addr, const u8 *buf, 478 int len) 479 { 480 return w5100_writebulk_indirect(priv->ndev, addr, buf, len); 481 } 482 483 #else /* CONFIG_WIZNET_BUS_ANY */ 484 485 static int w5100_read(struct w5100_priv *priv, u32 addr) 486 { 487 return priv->ops->read(priv->ndev, addr); 488 } 489 490 static int w5100_write(struct w5100_priv *priv, u32 addr, u8 data) 491 { 492 return priv->ops->write(priv->ndev, addr, data); 493 } 494 495 static int w5100_read16(struct w5100_priv *priv, u32 addr) 496 { 497 return priv->ops->read16(priv->ndev, addr); 498 } 499 500 static int w5100_write16(struct w5100_priv *priv, u32 addr, u16 data) 501 { 502 return priv->ops->write16(priv->ndev, addr, data); 503 } 504 505 static int w5100_readbulk(struct w5100_priv *priv, u32 addr, u8 *buf, int len) 506 { 507 return priv->ops->readbulk(priv->ndev, addr, buf, len); 508 } 509 510 static int w5100_writebulk(struct w5100_priv *priv, u32 addr, const u8 *buf, 511 int len) 512 { 513 return priv->ops->writebulk(priv->ndev, addr, buf, len); 514 } 515 516 #endif 517 518 static int w5100_readbuf(struct w5100_priv *priv, u16 offset, u8 *buf, int len) 519 { 520 u32 addr; 521 int remain = 0; 522 int ret; 523 const u32 mem_start = priv->s0_rx_buf; 524 const u16 mem_size = priv->s0_rx_buf_size; 525 526 offset %= mem_size; 527 addr = mem_start + offset; 528 529 if (offset + len > mem_size) { 530 remain = (offset + len) % mem_size; 531 len = mem_size - offset; 532 } 533 534 ret = w5100_readbulk(priv, addr, buf, len); 535 if (ret || !remain) 536 return ret; 537 538 return w5100_readbulk(priv, mem_start, buf + len, remain); 539 } 540 541 static int w5100_writebuf(struct w5100_priv *priv, u16 offset, const u8 *buf, 542 int len) 543 { 544 u32 addr; 545 int ret; 546 int remain = 0; 547 const u32 mem_start = priv->s0_tx_buf; 548 const u16 mem_size = priv->s0_tx_buf_size; 549 550 offset %= mem_size; 551 addr = mem_start + offset; 552 553 if (offset + len > mem_size) { 554 remain = (offset + len) % mem_size; 555 len = mem_size - offset; 556 } 557 558 ret = w5100_writebulk(priv, addr, buf, len); 559 if (ret || !remain) 560 return ret; 561 562 return w5100_writebulk(priv, mem_start, buf + len, remain); 563 } 564 565 static int w5100_reset(struct w5100_priv *priv) 566 { 567 if (priv->ops->reset) 568 return priv->ops->reset(priv->ndev); 569 570 w5100_write(priv, W5100_MR, MR_RST); 571 mdelay(5); 572 w5100_write(priv, W5100_MR, MR_PB); 573 574 return 0; 575 } 576 577 static int w5100_command(struct w5100_priv *priv, u16 cmd) 578 { 579 unsigned long timeout; 580 581 w5100_write(priv, W5100_S0_CR(priv), cmd); 582 583 timeout = jiffies + msecs_to_jiffies(100); 584 585 while (w5100_read(priv, W5100_S0_CR(priv)) != 0) { 586 if (time_after(jiffies, timeout)) 587 return -EIO; 588 cpu_relax(); 589 } 590 591 return 0; 592 } 593 594 static void w5100_write_macaddr(struct w5100_priv *priv) 595 { 596 struct net_device *ndev = priv->ndev; 597 598 w5100_writebulk(priv, W5100_SHAR, ndev->dev_addr, ETH_ALEN); 599 } 600 601 static void w5100_socket_intr_mask(struct w5100_priv *priv, u8 mask) 602 { 603 u32 imr; 604 605 if (priv->ops->chip_id == W5500) 606 imr = W5500_SIMR; 607 else 608 imr = W5100_IMR; 609 610 w5100_write(priv, imr, mask); 611 } 612 613 static void w5100_enable_intr(struct w5100_priv *priv) 614 { 615 w5100_socket_intr_mask(priv, IR_S0); 616 } 617 618 static void w5100_disable_intr(struct w5100_priv *priv) 619 { 620 w5100_socket_intr_mask(priv, 0); 621 } 622 623 static void w5100_memory_configure(struct w5100_priv *priv) 624 { 625 /* Configure 16K of internal memory 626 * as 8K RX buffer and 8K TX buffer 627 */ 628 w5100_write(priv, W5100_RMSR, 0x03); 629 w5100_write(priv, W5100_TMSR, 0x03); 630 } 631 632 static void w5200_memory_configure(struct w5100_priv *priv) 633 { 634 int i; 635 636 /* Configure internal RX memory as 16K RX buffer and 637 * internal TX memory as 16K TX buffer 638 */ 639 w5100_write(priv, W5200_Sn_RXMEM_SIZE(0), 0x10); 640 w5100_write(priv, W5200_Sn_TXMEM_SIZE(0), 0x10); 641 642 for (i = 1; i < 8; i++) { 643 w5100_write(priv, W5200_Sn_RXMEM_SIZE(i), 0); 644 w5100_write(priv, W5200_Sn_TXMEM_SIZE(i), 0); 645 } 646 } 647 648 static void w5500_memory_configure(struct w5100_priv *priv) 649 { 650 int i; 651 652 /* Configure internal RX memory as 16K RX buffer and 653 * internal TX memory as 16K TX buffer 654 */ 655 w5100_write(priv, W5500_Sn_RXMEM_SIZE(0), 0x10); 656 w5100_write(priv, W5500_Sn_TXMEM_SIZE(0), 0x10); 657 658 for (i = 1; i < 8; i++) { 659 w5100_write(priv, W5500_Sn_RXMEM_SIZE(i), 0); 660 w5100_write(priv, W5500_Sn_TXMEM_SIZE(i), 0); 661 } 662 } 663 664 static int w5100_hw_reset(struct w5100_priv *priv) 665 { 666 u32 rtr; 667 668 w5100_reset(priv); 669 670 w5100_disable_intr(priv); 671 w5100_write_macaddr(priv); 672 673 switch (priv->ops->chip_id) { 674 case W5100: 675 w5100_memory_configure(priv); 676 rtr = W5100_RTR; 677 break; 678 case W5200: 679 w5200_memory_configure(priv); 680 rtr = W5100_RTR; 681 break; 682 case W5500: 683 w5500_memory_configure(priv); 684 rtr = W5500_RTR; 685 break; 686 default: 687 return -EINVAL; 688 } 689 690 if (w5100_read16(priv, rtr) != RTR_DEFAULT) 691 return -ENODEV; 692 693 return 0; 694 } 695 696 static void w5100_hw_start(struct w5100_priv *priv) 697 { 698 u8 mode = S0_MR_MACRAW; 699 700 if (!priv->promisc) { 701 if (priv->ops->chip_id == W5500) 702 mode |= W5500_S0_MR_MF; 703 else 704 mode |= S0_MR_MF; 705 } 706 707 w5100_write(priv, W5100_S0_MR(priv), mode); 708 w5100_command(priv, S0_CR_OPEN); 709 w5100_enable_intr(priv); 710 } 711 712 static void w5100_hw_close(struct w5100_priv *priv) 713 { 714 w5100_disable_intr(priv); 715 w5100_command(priv, S0_CR_CLOSE); 716 } 717 718 /*********************************************************************** 719 * 720 * Device driver functions / callbacks 721 * 722 ***********************************************************************/ 723 724 static void w5100_get_drvinfo(struct net_device *ndev, 725 struct ethtool_drvinfo *info) 726 { 727 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 728 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 729 strlcpy(info->bus_info, dev_name(ndev->dev.parent), 730 sizeof(info->bus_info)); 731 } 732 733 static u32 w5100_get_link(struct net_device *ndev) 734 { 735 struct w5100_priv *priv = netdev_priv(ndev); 736 737 if (gpio_is_valid(priv->link_gpio)) 738 return !!gpio_get_value(priv->link_gpio); 739 740 return 1; 741 } 742 743 static u32 w5100_get_msglevel(struct net_device *ndev) 744 { 745 struct w5100_priv *priv = netdev_priv(ndev); 746 747 return priv->msg_enable; 748 } 749 750 static void w5100_set_msglevel(struct net_device *ndev, u32 value) 751 { 752 struct w5100_priv *priv = netdev_priv(ndev); 753 754 priv->msg_enable = value; 755 } 756 757 static int w5100_get_regs_len(struct net_device *ndev) 758 { 759 return W5100_COMMON_REGS_LEN + W5100_S0_REGS_LEN; 760 } 761 762 static void w5100_get_regs(struct net_device *ndev, 763 struct ethtool_regs *regs, void *buf) 764 { 765 struct w5100_priv *priv = netdev_priv(ndev); 766 767 regs->version = 1; 768 w5100_readbulk(priv, W5100_COMMON_REGS, buf, W5100_COMMON_REGS_LEN); 769 buf += W5100_COMMON_REGS_LEN; 770 w5100_readbulk(priv, S0_REGS(priv), buf, W5100_S0_REGS_LEN); 771 } 772 773 static void w5100_restart(struct net_device *ndev) 774 { 775 struct w5100_priv *priv = netdev_priv(ndev); 776 777 netif_stop_queue(ndev); 778 w5100_hw_reset(priv); 779 w5100_hw_start(priv); 780 ndev->stats.tx_errors++; 781 netif_trans_update(ndev); 782 netif_wake_queue(ndev); 783 } 784 785 static void w5100_restart_work(struct work_struct *work) 786 { 787 struct w5100_priv *priv = container_of(work, struct w5100_priv, 788 restart_work); 789 790 w5100_restart(priv->ndev); 791 } 792 793 static void w5100_tx_timeout(struct net_device *ndev) 794 { 795 struct w5100_priv *priv = netdev_priv(ndev); 796 797 if (priv->ops->may_sleep) 798 schedule_work(&priv->restart_work); 799 else 800 w5100_restart(ndev); 801 } 802 803 static void w5100_tx_skb(struct net_device *ndev, struct sk_buff *skb) 804 { 805 struct w5100_priv *priv = netdev_priv(ndev); 806 u16 offset; 807 808 offset = w5100_read16(priv, W5100_S0_TX_WR(priv)); 809 w5100_writebuf(priv, offset, skb->data, skb->len); 810 w5100_write16(priv, W5100_S0_TX_WR(priv), offset + skb->len); 811 ndev->stats.tx_bytes += skb->len; 812 ndev->stats.tx_packets++; 813 dev_kfree_skb(skb); 814 815 w5100_command(priv, S0_CR_SEND); 816 } 817 818 static void w5100_tx_work(struct work_struct *work) 819 { 820 struct w5100_priv *priv = container_of(work, struct w5100_priv, 821 tx_work); 822 struct sk_buff *skb = priv->tx_skb; 823 824 priv->tx_skb = NULL; 825 826 if (WARN_ON(!skb)) 827 return; 828 w5100_tx_skb(priv->ndev, skb); 829 } 830 831 static netdev_tx_t w5100_start_tx(struct sk_buff *skb, struct net_device *ndev) 832 { 833 struct w5100_priv *priv = netdev_priv(ndev); 834 835 netif_stop_queue(ndev); 836 837 if (priv->ops->may_sleep) { 838 WARN_ON(priv->tx_skb); 839 priv->tx_skb = skb; 840 queue_work(priv->xfer_wq, &priv->tx_work); 841 } else { 842 w5100_tx_skb(ndev, skb); 843 } 844 845 return NETDEV_TX_OK; 846 } 847 848 static struct sk_buff *w5100_rx_skb(struct net_device *ndev) 849 { 850 struct w5100_priv *priv = netdev_priv(ndev); 851 struct sk_buff *skb; 852 u16 rx_len; 853 u16 offset; 854 u8 header[2]; 855 u16 rx_buf_len = w5100_read16(priv, W5100_S0_RX_RSR(priv)); 856 857 if (rx_buf_len == 0) 858 return NULL; 859 860 offset = w5100_read16(priv, W5100_S0_RX_RD(priv)); 861 w5100_readbuf(priv, offset, header, 2); 862 rx_len = get_unaligned_be16(header) - 2; 863 864 skb = netdev_alloc_skb_ip_align(ndev, rx_len); 865 if (unlikely(!skb)) { 866 w5100_write16(priv, W5100_S0_RX_RD(priv), offset + rx_buf_len); 867 w5100_command(priv, S0_CR_RECV); 868 ndev->stats.rx_dropped++; 869 return NULL; 870 } 871 872 skb_put(skb, rx_len); 873 w5100_readbuf(priv, offset + 2, skb->data, rx_len); 874 w5100_write16(priv, W5100_S0_RX_RD(priv), offset + 2 + rx_len); 875 w5100_command(priv, S0_CR_RECV); 876 skb->protocol = eth_type_trans(skb, ndev); 877 878 ndev->stats.rx_packets++; 879 ndev->stats.rx_bytes += rx_len; 880 881 return skb; 882 } 883 884 static void w5100_rx_work(struct work_struct *work) 885 { 886 struct w5100_priv *priv = container_of(work, struct w5100_priv, 887 rx_work); 888 struct sk_buff *skb; 889 890 while ((skb = w5100_rx_skb(priv->ndev))) 891 netif_rx_ni(skb); 892 893 w5100_enable_intr(priv); 894 } 895 896 static int w5100_napi_poll(struct napi_struct *napi, int budget) 897 { 898 struct w5100_priv *priv = container_of(napi, struct w5100_priv, napi); 899 int rx_count; 900 901 for (rx_count = 0; rx_count < budget; rx_count++) { 902 struct sk_buff *skb = w5100_rx_skb(priv->ndev); 903 904 if (skb) 905 netif_receive_skb(skb); 906 else 907 break; 908 } 909 910 if (rx_count < budget) { 911 napi_complete_done(napi, rx_count); 912 w5100_enable_intr(priv); 913 } 914 915 return rx_count; 916 } 917 918 static irqreturn_t w5100_interrupt(int irq, void *ndev_instance) 919 { 920 struct net_device *ndev = ndev_instance; 921 struct w5100_priv *priv = netdev_priv(ndev); 922 923 int ir = w5100_read(priv, W5100_S0_IR(priv)); 924 if (!ir) 925 return IRQ_NONE; 926 w5100_write(priv, W5100_S0_IR(priv), ir); 927 928 if (ir & S0_IR_SENDOK) { 929 netif_dbg(priv, tx_done, ndev, "tx done\n"); 930 netif_wake_queue(ndev); 931 } 932 933 if (ir & S0_IR_RECV) { 934 w5100_disable_intr(priv); 935 936 if (priv->ops->may_sleep) 937 queue_work(priv->xfer_wq, &priv->rx_work); 938 else if (napi_schedule_prep(&priv->napi)) 939 __napi_schedule(&priv->napi); 940 } 941 942 return IRQ_HANDLED; 943 } 944 945 static irqreturn_t w5100_detect_link(int irq, void *ndev_instance) 946 { 947 struct net_device *ndev = ndev_instance; 948 struct w5100_priv *priv = netdev_priv(ndev); 949 950 if (netif_running(ndev)) { 951 if (gpio_get_value(priv->link_gpio) != 0) { 952 netif_info(priv, link, ndev, "link is up\n"); 953 netif_carrier_on(ndev); 954 } else { 955 netif_info(priv, link, ndev, "link is down\n"); 956 netif_carrier_off(ndev); 957 } 958 } 959 960 return IRQ_HANDLED; 961 } 962 963 static void w5100_setrx_work(struct work_struct *work) 964 { 965 struct w5100_priv *priv = container_of(work, struct w5100_priv, 966 setrx_work); 967 968 w5100_hw_start(priv); 969 } 970 971 static void w5100_set_rx_mode(struct net_device *ndev) 972 { 973 struct w5100_priv *priv = netdev_priv(ndev); 974 bool set_promisc = (ndev->flags & IFF_PROMISC) != 0; 975 976 if (priv->promisc != set_promisc) { 977 priv->promisc = set_promisc; 978 979 if (priv->ops->may_sleep) 980 schedule_work(&priv->setrx_work); 981 else 982 w5100_hw_start(priv); 983 } 984 } 985 986 static int w5100_set_macaddr(struct net_device *ndev, void *addr) 987 { 988 struct w5100_priv *priv = netdev_priv(ndev); 989 struct sockaddr *sock_addr = addr; 990 991 if (!is_valid_ether_addr(sock_addr->sa_data)) 992 return -EADDRNOTAVAIL; 993 memcpy(ndev->dev_addr, sock_addr->sa_data, ETH_ALEN); 994 w5100_write_macaddr(priv); 995 return 0; 996 } 997 998 static int w5100_open(struct net_device *ndev) 999 { 1000 struct w5100_priv *priv = netdev_priv(ndev); 1001 1002 netif_info(priv, ifup, ndev, "enabling\n"); 1003 w5100_hw_start(priv); 1004 napi_enable(&priv->napi); 1005 netif_start_queue(ndev); 1006 if (!gpio_is_valid(priv->link_gpio) || 1007 gpio_get_value(priv->link_gpio) != 0) 1008 netif_carrier_on(ndev); 1009 return 0; 1010 } 1011 1012 static int w5100_stop(struct net_device *ndev) 1013 { 1014 struct w5100_priv *priv = netdev_priv(ndev); 1015 1016 netif_info(priv, ifdown, ndev, "shutting down\n"); 1017 w5100_hw_close(priv); 1018 netif_carrier_off(ndev); 1019 netif_stop_queue(ndev); 1020 napi_disable(&priv->napi); 1021 return 0; 1022 } 1023 1024 static const struct ethtool_ops w5100_ethtool_ops = { 1025 .get_drvinfo = w5100_get_drvinfo, 1026 .get_msglevel = w5100_get_msglevel, 1027 .set_msglevel = w5100_set_msglevel, 1028 .get_link = w5100_get_link, 1029 .get_regs_len = w5100_get_regs_len, 1030 .get_regs = w5100_get_regs, 1031 }; 1032 1033 static const struct net_device_ops w5100_netdev_ops = { 1034 .ndo_open = w5100_open, 1035 .ndo_stop = w5100_stop, 1036 .ndo_start_xmit = w5100_start_tx, 1037 .ndo_tx_timeout = w5100_tx_timeout, 1038 .ndo_set_rx_mode = w5100_set_rx_mode, 1039 .ndo_set_mac_address = w5100_set_macaddr, 1040 .ndo_validate_addr = eth_validate_addr, 1041 }; 1042 1043 static int w5100_mmio_probe(struct platform_device *pdev) 1044 { 1045 struct wiznet_platform_data *data = dev_get_platdata(&pdev->dev); 1046 const void *mac_addr = NULL; 1047 struct resource *mem; 1048 const struct w5100_ops *ops; 1049 int irq; 1050 1051 if (data && is_valid_ether_addr(data->mac_addr)) 1052 mac_addr = data->mac_addr; 1053 1054 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1055 if (resource_size(mem) < W5100_BUS_DIRECT_SIZE) 1056 ops = &w5100_mmio_indirect_ops; 1057 else 1058 ops = &w5100_mmio_direct_ops; 1059 1060 irq = platform_get_irq(pdev, 0); 1061 if (irq < 0) 1062 return irq; 1063 1064 return w5100_probe(&pdev->dev, ops, sizeof(struct w5100_mmio_priv), 1065 mac_addr, irq, data ? data->link_gpio : -EINVAL); 1066 } 1067 1068 static int w5100_mmio_remove(struct platform_device *pdev) 1069 { 1070 return w5100_remove(&pdev->dev); 1071 } 1072 1073 void *w5100_ops_priv(const struct net_device *ndev) 1074 { 1075 return netdev_priv(ndev) + 1076 ALIGN(sizeof(struct w5100_priv), NETDEV_ALIGN); 1077 } 1078 EXPORT_SYMBOL_GPL(w5100_ops_priv); 1079 1080 int w5100_probe(struct device *dev, const struct w5100_ops *ops, 1081 int sizeof_ops_priv, const void *mac_addr, int irq, 1082 int link_gpio) 1083 { 1084 struct w5100_priv *priv; 1085 struct net_device *ndev; 1086 int err; 1087 size_t alloc_size; 1088 1089 alloc_size = sizeof(*priv); 1090 if (sizeof_ops_priv) { 1091 alloc_size = ALIGN(alloc_size, NETDEV_ALIGN); 1092 alloc_size += sizeof_ops_priv; 1093 } 1094 alloc_size += NETDEV_ALIGN - 1; 1095 1096 ndev = alloc_etherdev(alloc_size); 1097 if (!ndev) 1098 return -ENOMEM; 1099 SET_NETDEV_DEV(ndev, dev); 1100 dev_set_drvdata(dev, ndev); 1101 priv = netdev_priv(ndev); 1102 1103 switch (ops->chip_id) { 1104 case W5100: 1105 priv->s0_regs = W5100_S0_REGS; 1106 priv->s0_tx_buf = W5100_TX_MEM_START; 1107 priv->s0_tx_buf_size = W5100_TX_MEM_SIZE; 1108 priv->s0_rx_buf = W5100_RX_MEM_START; 1109 priv->s0_rx_buf_size = W5100_RX_MEM_SIZE; 1110 break; 1111 case W5200: 1112 priv->s0_regs = W5200_S0_REGS; 1113 priv->s0_tx_buf = W5200_TX_MEM_START; 1114 priv->s0_tx_buf_size = W5200_TX_MEM_SIZE; 1115 priv->s0_rx_buf = W5200_RX_MEM_START; 1116 priv->s0_rx_buf_size = W5200_RX_MEM_SIZE; 1117 break; 1118 case W5500: 1119 priv->s0_regs = W5500_S0_REGS; 1120 priv->s0_tx_buf = W5500_TX_MEM_START; 1121 priv->s0_tx_buf_size = W5500_TX_MEM_SIZE; 1122 priv->s0_rx_buf = W5500_RX_MEM_START; 1123 priv->s0_rx_buf_size = W5500_RX_MEM_SIZE; 1124 break; 1125 default: 1126 err = -EINVAL; 1127 goto err_register; 1128 } 1129 1130 priv->ndev = ndev; 1131 priv->ops = ops; 1132 priv->irq = irq; 1133 priv->link_gpio = link_gpio; 1134 1135 ndev->netdev_ops = &w5100_netdev_ops; 1136 ndev->ethtool_ops = &w5100_ethtool_ops; 1137 netif_napi_add(ndev, &priv->napi, w5100_napi_poll, 16); 1138 1139 /* This chip doesn't support VLAN packets with normal MTU, 1140 * so disable VLAN for this device. 1141 */ 1142 ndev->features |= NETIF_F_VLAN_CHALLENGED; 1143 1144 err = register_netdev(ndev); 1145 if (err < 0) 1146 goto err_register; 1147 1148 priv->xfer_wq = alloc_workqueue("%s", WQ_MEM_RECLAIM, 0, 1149 netdev_name(ndev)); 1150 if (!priv->xfer_wq) { 1151 err = -ENOMEM; 1152 goto err_wq; 1153 } 1154 1155 INIT_WORK(&priv->rx_work, w5100_rx_work); 1156 INIT_WORK(&priv->tx_work, w5100_tx_work); 1157 INIT_WORK(&priv->setrx_work, w5100_setrx_work); 1158 INIT_WORK(&priv->restart_work, w5100_restart_work); 1159 1160 if (!IS_ERR_OR_NULL(mac_addr)) 1161 memcpy(ndev->dev_addr, mac_addr, ETH_ALEN); 1162 else 1163 eth_hw_addr_random(ndev); 1164 1165 if (priv->ops->init) { 1166 err = priv->ops->init(priv->ndev); 1167 if (err) 1168 goto err_hw; 1169 } 1170 1171 err = w5100_hw_reset(priv); 1172 if (err) 1173 goto err_hw; 1174 1175 if (ops->may_sleep) { 1176 err = request_threaded_irq(priv->irq, NULL, w5100_interrupt, 1177 IRQF_TRIGGER_LOW | IRQF_ONESHOT, 1178 netdev_name(ndev), ndev); 1179 } else { 1180 err = request_irq(priv->irq, w5100_interrupt, 1181 IRQF_TRIGGER_LOW, netdev_name(ndev), ndev); 1182 } 1183 if (err) 1184 goto err_hw; 1185 1186 if (gpio_is_valid(priv->link_gpio)) { 1187 char *link_name = devm_kzalloc(dev, 16, GFP_KERNEL); 1188 1189 if (!link_name) { 1190 err = -ENOMEM; 1191 goto err_gpio; 1192 } 1193 snprintf(link_name, 16, "%s-link", netdev_name(ndev)); 1194 priv->link_irq = gpio_to_irq(priv->link_gpio); 1195 if (request_any_context_irq(priv->link_irq, w5100_detect_link, 1196 IRQF_TRIGGER_RISING | 1197 IRQF_TRIGGER_FALLING, 1198 link_name, priv->ndev) < 0) 1199 priv->link_gpio = -EINVAL; 1200 } 1201 1202 return 0; 1203 1204 err_gpio: 1205 free_irq(priv->irq, ndev); 1206 err_hw: 1207 destroy_workqueue(priv->xfer_wq); 1208 err_wq: 1209 unregister_netdev(ndev); 1210 err_register: 1211 free_netdev(ndev); 1212 return err; 1213 } 1214 EXPORT_SYMBOL_GPL(w5100_probe); 1215 1216 int w5100_remove(struct device *dev) 1217 { 1218 struct net_device *ndev = dev_get_drvdata(dev); 1219 struct w5100_priv *priv = netdev_priv(ndev); 1220 1221 w5100_hw_reset(priv); 1222 free_irq(priv->irq, ndev); 1223 if (gpio_is_valid(priv->link_gpio)) 1224 free_irq(priv->link_irq, ndev); 1225 1226 flush_work(&priv->setrx_work); 1227 flush_work(&priv->restart_work); 1228 destroy_workqueue(priv->xfer_wq); 1229 1230 unregister_netdev(ndev); 1231 free_netdev(ndev); 1232 return 0; 1233 } 1234 EXPORT_SYMBOL_GPL(w5100_remove); 1235 1236 #ifdef CONFIG_PM_SLEEP 1237 static int w5100_suspend(struct device *dev) 1238 { 1239 struct net_device *ndev = dev_get_drvdata(dev); 1240 struct w5100_priv *priv = netdev_priv(ndev); 1241 1242 if (netif_running(ndev)) { 1243 netif_carrier_off(ndev); 1244 netif_device_detach(ndev); 1245 1246 w5100_hw_close(priv); 1247 } 1248 return 0; 1249 } 1250 1251 static int w5100_resume(struct device *dev) 1252 { 1253 struct net_device *ndev = dev_get_drvdata(dev); 1254 struct w5100_priv *priv = netdev_priv(ndev); 1255 1256 if (netif_running(ndev)) { 1257 w5100_hw_reset(priv); 1258 w5100_hw_start(priv); 1259 1260 netif_device_attach(ndev); 1261 if (!gpio_is_valid(priv->link_gpio) || 1262 gpio_get_value(priv->link_gpio) != 0) 1263 netif_carrier_on(ndev); 1264 } 1265 return 0; 1266 } 1267 #endif /* CONFIG_PM_SLEEP */ 1268 1269 SIMPLE_DEV_PM_OPS(w5100_pm_ops, w5100_suspend, w5100_resume); 1270 EXPORT_SYMBOL_GPL(w5100_pm_ops); 1271 1272 static struct platform_driver w5100_mmio_driver = { 1273 .driver = { 1274 .name = DRV_NAME, 1275 .pm = &w5100_pm_ops, 1276 }, 1277 .probe = w5100_mmio_probe, 1278 .remove = w5100_mmio_remove, 1279 }; 1280 module_platform_driver(w5100_mmio_driver); 1281