1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2011
4 * eInfochips Ltd. <www.einfochips.com>
5 * Written-by: Ajay Bhargav <contact@8051projects.net>
6 *
7 * (C) Copyright 2010
8 * Marvell Semiconductor <www.marvell.com>
9 * Contributor: Mahavir Jain <mjain@marvell.com>
10 */
11
12 #include <common.h>
13 #include <net.h>
14 #include <malloc.h>
15 #include <miiphy.h>
16 #include <netdev.h>
17 #include <asm/types.h>
18 #include <asm/byteorder.h>
19 #include <linux/err.h>
20 #include <linux/mii.h>
21 #include <asm/io.h>
22 #include <asm/arch/armada100.h>
23 #include "armada100_fec.h"
24
25 #define PHY_ADR_REQ 0xFF /* Magic number to read/write PHY address */
26
27 #ifdef DEBUG
eth_dump_regs(struct eth_device * dev)28 static int eth_dump_regs(struct eth_device *dev)
29 {
30 struct armdfec_device *darmdfec = to_darmdfec(dev);
31 struct armdfec_reg *regs = darmdfec->regs;
32 unsigned int i = 0;
33
34 printf("\noffset: phy_adr, value: 0x%x\n", readl(®s->phyadr));
35 printf("offset: smi, value: 0x%x\n", readl(®s->smi));
36 for (i = 0x400; i <= 0x4e4; i += 4)
37 printf("offset: 0x%x, value: 0x%x\n",
38 i, readl(ARMD1_FEC_BASE + i));
39 return 0;
40 }
41 #endif
42
armdfec_phy_timeout(u32 * reg,u32 flag,int cond)43 static int armdfec_phy_timeout(u32 *reg, u32 flag, int cond)
44 {
45 u32 timeout = PHY_WAIT_ITERATIONS;
46 u32 reg_val;
47
48 while (--timeout) {
49 reg_val = readl(reg);
50 if (cond && (reg_val & flag))
51 break;
52 else if (!cond && !(reg_val & flag))
53 break;
54 udelay(PHY_WAIT_MICRO_SECONDS);
55 }
56 return !timeout;
57 }
58
smi_reg_read(struct mii_dev * bus,int phy_addr,int devad,int phy_reg)59 static int smi_reg_read(struct mii_dev *bus, int phy_addr, int devad,
60 int phy_reg)
61 {
62 u16 value = 0;
63 struct eth_device *dev = eth_get_dev_by_name(bus->name);
64 struct armdfec_device *darmdfec = to_darmdfec(dev);
65 struct armdfec_reg *regs = darmdfec->regs;
66 u32 val;
67
68 if (phy_addr == PHY_ADR_REQ && phy_reg == PHY_ADR_REQ) {
69 val = readl(®s->phyadr);
70 value = val & 0x1f;
71 return value;
72 }
73
74 /* check parameters */
75 if (phy_addr > PHY_MASK) {
76 printf("ARMD100 FEC: (%s) Invalid phy address: 0x%X\n",
77 __func__, phy_addr);
78 return -EINVAL;
79 }
80 if (phy_reg > PHY_MASK) {
81 printf("ARMD100 FEC: (%s) Invalid register offset: 0x%X\n",
82 __func__, phy_reg);
83 return -EINVAL;
84 }
85
86 /* wait for the SMI register to become available */
87 if (armdfec_phy_timeout(®s->smi, SMI_BUSY, false)) {
88 printf("ARMD100 FEC: (%s) PHY busy timeout\n", __func__);
89 return -1;
90 }
91
92 writel((phy_addr << 16) | (phy_reg << 21) | SMI_OP_R, ®s->smi);
93
94 /* now wait for the data to be valid */
95 if (armdfec_phy_timeout(®s->smi, SMI_R_VALID, true)) {
96 val = readl(®s->smi);
97 printf("ARMD100 FEC: (%s) PHY Read timeout, val=0x%x\n",
98 __func__, val);
99 return -1;
100 }
101 val = readl(®s->smi);
102 value = val & 0xffff;
103
104 return value;
105 }
106
smi_reg_write(struct mii_dev * bus,int phy_addr,int devad,int phy_reg,u16 value)107 static int smi_reg_write(struct mii_dev *bus, int phy_addr, int devad,
108 int phy_reg, u16 value)
109 {
110 struct eth_device *dev = eth_get_dev_by_name(bus->name);
111 struct armdfec_device *darmdfec = to_darmdfec(dev);
112 struct armdfec_reg *regs = darmdfec->regs;
113
114 if (phy_addr == PHY_ADR_REQ && phy_reg == PHY_ADR_REQ) {
115 clrsetbits_le32(®s->phyadr, 0x1f, value & 0x1f);
116 return 0;
117 }
118
119 /* check parameters */
120 if (phy_addr > PHY_MASK) {
121 printf("ARMD100 FEC: (%s) Invalid phy address\n", __func__);
122 return -EINVAL;
123 }
124 if (phy_reg > PHY_MASK) {
125 printf("ARMD100 FEC: (%s) Invalid register offset\n", __func__);
126 return -EINVAL;
127 }
128
129 /* wait for the SMI register to become available */
130 if (armdfec_phy_timeout(®s->smi, SMI_BUSY, false)) {
131 printf("ARMD100 FEC: (%s) PHY busy timeout\n", __func__);
132 return -1;
133 }
134
135 writel((phy_addr << 16) | (phy_reg << 21) | SMI_OP_W | (value & 0xffff),
136 ®s->smi);
137 return 0;
138 }
139
140 /*
141 * Abort any transmit and receive operations and put DMA
142 * in idle state. AT and AR bits are cleared upon entering
143 * in IDLE state. So poll those bits to verify operation.
144 */
abortdma(struct eth_device * dev)145 static void abortdma(struct eth_device *dev)
146 {
147 struct armdfec_device *darmdfec = to_darmdfec(dev);
148 struct armdfec_reg *regs = darmdfec->regs;
149 int delay;
150 int maxretries = 40;
151 u32 tmp;
152
153 while (--maxretries) {
154 writel(SDMA_CMD_AR | SDMA_CMD_AT, ®s->sdma_cmd);
155 udelay(100);
156
157 delay = 10;
158 while (--delay) {
159 tmp = readl(®s->sdma_cmd);
160 if (!(tmp & (SDMA_CMD_AR | SDMA_CMD_AT)))
161 break;
162 udelay(10);
163 }
164 if (delay)
165 break;
166 }
167
168 if (!maxretries)
169 printf("ARMD100 FEC: (%s) DMA Stuck\n", __func__);
170 }
171
nibble_swapping_32_bit(u32 x)172 static inline u32 nibble_swapping_32_bit(u32 x)
173 {
174 return ((x & 0xf0f0f0f0) >> 4) | ((x & 0x0f0f0f0f) << 4);
175 }
176
nibble_swapping_16_bit(u32 x)177 static inline u32 nibble_swapping_16_bit(u32 x)
178 {
179 return ((x & 0x0000f0f0) >> 4) | ((x & 0x00000f0f) << 4);
180 }
181
flip_4_bits(u32 x)182 static inline u32 flip_4_bits(u32 x)
183 {
184 return ((x & 0x01) << 3) | ((x & 0x002) << 1)
185 | ((x & 0x04) >> 1) | ((x & 0x008) >> 3);
186 }
187
188 /*
189 * This function will calculate the hash function of the address.
190 * depends on the hash mode and hash size.
191 * Inputs
192 * mach - the 2 most significant bytes of the MAC address.
193 * macl - the 4 least significant bytes of the MAC address.
194 * Outputs
195 * return the calculated entry.
196 */
hash_function(u32 mach,u32 macl)197 static u32 hash_function(u32 mach, u32 macl)
198 {
199 u32 hashresult;
200 u32 addrh;
201 u32 addrl;
202 u32 addr0;
203 u32 addr1;
204 u32 addr2;
205 u32 addr3;
206 u32 addrhswapped;
207 u32 addrlswapped;
208
209 addrh = nibble_swapping_16_bit(mach);
210 addrl = nibble_swapping_32_bit(macl);
211
212 addrhswapped = flip_4_bits(addrh & 0xf)
213 + ((flip_4_bits((addrh >> 4) & 0xf)) << 4)
214 + ((flip_4_bits((addrh >> 8) & 0xf)) << 8)
215 + ((flip_4_bits((addrh >> 12) & 0xf)) << 12);
216
217 addrlswapped = flip_4_bits(addrl & 0xf)
218 + ((flip_4_bits((addrl >> 4) & 0xf)) << 4)
219 + ((flip_4_bits((addrl >> 8) & 0xf)) << 8)
220 + ((flip_4_bits((addrl >> 12) & 0xf)) << 12)
221 + ((flip_4_bits((addrl >> 16) & 0xf)) << 16)
222 + ((flip_4_bits((addrl >> 20) & 0xf)) << 20)
223 + ((flip_4_bits((addrl >> 24) & 0xf)) << 24)
224 + ((flip_4_bits((addrl >> 28) & 0xf)) << 28);
225
226 addrh = addrhswapped;
227 addrl = addrlswapped;
228
229 addr0 = (addrl >> 2) & 0x03f;
230 addr1 = (addrl & 0x003) | (((addrl >> 8) & 0x7f) << 2);
231 addr2 = (addrl >> 15) & 0x1ff;
232 addr3 = ((addrl >> 24) & 0x0ff) | ((addrh & 1) << 8);
233
234 hashresult = (addr0 << 9) | (addr1 ^ addr2 ^ addr3);
235 hashresult = hashresult & 0x07ff;
236 return hashresult;
237 }
238
239 /*
240 * This function will add an entry to the address table.
241 * depends on the hash mode and hash size that was initialized.
242 * Inputs
243 * mach - the 2 most significant bytes of the MAC address.
244 * macl - the 4 least significant bytes of the MAC address.
245 * skip - if 1, skip this address.
246 * rd - the RD field in the address table.
247 * Outputs
248 * address table entry is added.
249 * 0 if success.
250 * -ENOSPC if table full
251 */
add_del_hash_entry(struct armdfec_device * darmdfec,u32 mach,u32 macl,u32 rd,u32 skip,int del)252 static int add_del_hash_entry(struct armdfec_device *darmdfec, u32 mach,
253 u32 macl, u32 rd, u32 skip, int del)
254 {
255 struct addr_table_entry_t *entry, *start;
256 u32 newhi;
257 u32 newlo;
258 u32 i;
259
260 newlo = (((mach >> 4) & 0xf) << 15)
261 | (((mach >> 0) & 0xf) << 11)
262 | (((mach >> 12) & 0xf) << 7)
263 | (((mach >> 8) & 0xf) << 3)
264 | (((macl >> 20) & 0x1) << 31)
265 | (((macl >> 16) & 0xf) << 27)
266 | (((macl >> 28) & 0xf) << 23)
267 | (((macl >> 24) & 0xf) << 19)
268 | (skip << HTESKIP) | (rd << HTERDBIT)
269 | HTEVALID;
270
271 newhi = (((macl >> 4) & 0xf) << 15)
272 | (((macl >> 0) & 0xf) << 11)
273 | (((macl >> 12) & 0xf) << 7)
274 | (((macl >> 8) & 0xf) << 3)
275 | (((macl >> 21) & 0x7) << 0);
276
277 /*
278 * Pick the appropriate table, start scanning for free/reusable
279 * entries at the index obtained by hashing the specified MAC address
280 */
281 start = (struct addr_table_entry_t *)(darmdfec->htpr);
282 entry = start + hash_function(mach, macl);
283 for (i = 0; i < HOP_NUMBER; i++) {
284 if (!(entry->lo & HTEVALID)) {
285 break;
286 } else {
287 /* if same address put in same position */
288 if (((entry->lo & 0xfffffff8) == (newlo & 0xfffffff8))
289 && (entry->hi == newhi))
290 break;
291 }
292 if (entry == start + 0x7ff)
293 entry = start;
294 else
295 entry++;
296 }
297
298 if (((entry->lo & 0xfffffff8) != (newlo & 0xfffffff8)) &&
299 (entry->hi != newhi) && del)
300 return 0;
301
302 if (i == HOP_NUMBER) {
303 if (!del) {
304 printf("ARMD100 FEC: (%s) table section is full\n",
305 __func__);
306 return -ENOSPC;
307 } else {
308 return 0;
309 }
310 }
311
312 /*
313 * Update the selected entry
314 */
315 if (del) {
316 entry->hi = 0;
317 entry->lo = 0;
318 } else {
319 entry->hi = newhi;
320 entry->lo = newlo;
321 }
322
323 return 0;
324 }
325
326 /*
327 * Create an addressTable entry from MAC address info
328 * found in the specifed net_device struct
329 *
330 * Input : pointer to ethernet interface network device structure
331 * Output : N/A
332 */
update_hash_table_mac_address(struct armdfec_device * darmdfec,u8 * oaddr,u8 * addr)333 static void update_hash_table_mac_address(struct armdfec_device *darmdfec,
334 u8 *oaddr, u8 *addr)
335 {
336 u32 mach;
337 u32 macl;
338
339 /* Delete old entry */
340 if (oaddr) {
341 mach = (oaddr[0] << 8) | oaddr[1];
342 macl = (oaddr[2] << 24) | (oaddr[3] << 16) |
343 (oaddr[4] << 8) | oaddr[5];
344 add_del_hash_entry(darmdfec, mach, macl, 1, 0, HASH_DELETE);
345 }
346
347 /* Add new entry */
348 mach = (addr[0] << 8) | addr[1];
349 macl = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
350 add_del_hash_entry(darmdfec, mach, macl, 1, 0, HASH_ADD);
351 }
352
353 /* Address Table Initialization */
init_hashtable(struct eth_device * dev)354 static void init_hashtable(struct eth_device *dev)
355 {
356 struct armdfec_device *darmdfec = to_darmdfec(dev);
357 struct armdfec_reg *regs = darmdfec->regs;
358 memset(darmdfec->htpr, 0, HASH_ADDR_TABLE_SIZE);
359 writel((u32)darmdfec->htpr, ®s->htpr);
360 }
361
362 /*
363 * This detects PHY chip from address 0-31 by reading PHY status
364 * registers. PHY chip can be connected at any of this address.
365 */
ethernet_phy_detect(struct eth_device * dev)366 static int ethernet_phy_detect(struct eth_device *dev)
367 {
368 u32 val;
369 u16 tmp, mii_status;
370 u8 addr;
371
372 for (addr = 0; addr < 32; addr++) {
373 if (miiphy_read(dev->name, addr, MII_BMSR, &mii_status) != 0)
374 /* try next phy */
375 continue;
376
377 /* invalid MII status. More validation required here... */
378 if (mii_status == 0 || mii_status == 0xffff)
379 /* try next phy */
380 continue;
381
382 if (miiphy_read(dev->name, addr, MII_PHYSID1, &tmp) != 0)
383 /* try next phy */
384 continue;
385
386 val = tmp << 16;
387 if (miiphy_read(dev->name, addr, MII_PHYSID2, &tmp) != 0)
388 /* try next phy */
389 continue;
390
391 val |= tmp;
392
393 if ((val & 0xfffffff0) != 0)
394 return addr;
395 }
396 return -1;
397 }
398
armdfec_init_rx_desc_ring(struct armdfec_device * darmdfec)399 static void armdfec_init_rx_desc_ring(struct armdfec_device *darmdfec)
400 {
401 struct rx_desc *p_rx_desc;
402 int i;
403
404 /* initialize the Rx descriptors ring */
405 p_rx_desc = darmdfec->p_rxdesc;
406 for (i = 0; i < RINGSZ; i++) {
407 p_rx_desc->cmd_sts = BUF_OWNED_BY_DMA | RX_EN_INT;
408 p_rx_desc->buf_size = PKTSIZE_ALIGN;
409 p_rx_desc->byte_cnt = 0;
410 p_rx_desc->buf_ptr = darmdfec->p_rxbuf + i * PKTSIZE_ALIGN;
411 if (i == (RINGSZ - 1)) {
412 p_rx_desc->nxtdesc_p = darmdfec->p_rxdesc;
413 } else {
414 p_rx_desc->nxtdesc_p = (struct rx_desc *)
415 ((u32)p_rx_desc + ARMDFEC_RXQ_DESC_ALIGNED_SIZE);
416 p_rx_desc = p_rx_desc->nxtdesc_p;
417 }
418 }
419 darmdfec->p_rxdesc_curr = darmdfec->p_rxdesc;
420 }
421
armdfec_init(struct eth_device * dev,bd_t * bd)422 static int armdfec_init(struct eth_device *dev, bd_t *bd)
423 {
424 struct armdfec_device *darmdfec = to_darmdfec(dev);
425 struct armdfec_reg *regs = darmdfec->regs;
426 int phy_adr;
427 u32 temp;
428
429 armdfec_init_rx_desc_ring(darmdfec);
430
431 /* Disable interrupts */
432 writel(0, ®s->im);
433 writel(0, ®s->ic);
434 /* Write to ICR to clear interrupts. */
435 writel(0, ®s->iwc);
436
437 /*
438 * Abort any transmit and receive operations and put DMA
439 * in idle state.
440 */
441 abortdma(dev);
442
443 /* Initialize address hash table */
444 init_hashtable(dev);
445
446 /* SDMA configuration */
447 writel(SDCR_BSZ8 | /* Burst size = 32 bytes */
448 SDCR_RIFB | /* Rx interrupt on frame */
449 SDCR_BLMT | /* Little endian transmit */
450 SDCR_BLMR | /* Little endian receive */
451 SDCR_RC_MAX_RETRANS, /* Max retransmit count */
452 ®s->sdma_conf);
453 /* Port Configuration */
454 writel(PCR_HS, ®s->pconf); /* Hash size is 1/2kb */
455
456 /* Set extended port configuration */
457 writel(PCXR_2BSM | /* Two byte suffix aligns IP hdr */
458 PCXR_DSCP_EN | /* Enable DSCP in IP */
459 PCXR_MFL_1536 | /* Set MTU = 1536 */
460 PCXR_FLP | /* do not force link pass */
461 PCXR_TX_HIGH_PRI, /* Transmit - high priority queue */
462 ®s->pconf_ext);
463
464 update_hash_table_mac_address(darmdfec, NULL, dev->enetaddr);
465
466 /* Update TX and RX queue descriptor register */
467 temp = (u32)®s->txcdp[TXQ];
468 writel((u32)darmdfec->p_txdesc, temp);
469 temp = (u32)®s->rxfdp[RXQ];
470 writel((u32)darmdfec->p_rxdesc, temp);
471 temp = (u32)®s->rxcdp[RXQ];
472 writel((u32)darmdfec->p_rxdesc_curr, temp);
473
474 /* Enable Interrupts */
475 writel(ALL_INTS, ®s->im);
476
477 /* Enable Ethernet Port */
478 setbits_le32(®s->pconf, PCR_EN);
479
480 /* Enable RX DMA engine */
481 setbits_le32(®s->sdma_cmd, SDMA_CMD_ERD);
482
483 #ifdef DEBUG
484 eth_dump_regs(dev);
485 #endif
486
487 #if (defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
488
489 #if defined(CONFIG_PHY_BASE_ADR)
490 miiphy_write(dev->name, PHY_ADR_REQ, PHY_ADR_REQ, CONFIG_PHY_BASE_ADR);
491 #else
492 /* Search phy address from range 0-31 */
493 phy_adr = ethernet_phy_detect(dev);
494 if (phy_adr < 0) {
495 printf("ARMD100 FEC: PHY not detected at address range 0-31\n");
496 return -1;
497 } else {
498 debug("ARMD100 FEC: PHY detected at addr %d\n", phy_adr);
499 miiphy_write(dev->name, PHY_ADR_REQ, PHY_ADR_REQ, phy_adr);
500 }
501 #endif
502
503 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN)
504 /* Wait up to 5s for the link status */
505 for (i = 0; i < 5; i++) {
506 u16 phy_adr;
507
508 miiphy_read(dev->name, 0xFF, 0xFF, &phy_adr);
509 /* Return if we get link up */
510 if (miiphy_link(dev->name, phy_adr))
511 return 0;
512 udelay(1000000);
513 }
514
515 printf("ARMD100 FEC: No link on %s\n", dev->name);
516 return -1;
517 #endif
518 #endif
519 return 0;
520 }
521
armdfec_halt(struct eth_device * dev)522 static void armdfec_halt(struct eth_device *dev)
523 {
524 struct armdfec_device *darmdfec = to_darmdfec(dev);
525 struct armdfec_reg *regs = darmdfec->regs;
526
527 /* Stop RX DMA */
528 clrbits_le32(®s->sdma_cmd, SDMA_CMD_ERD);
529
530 /*
531 * Abort any transmit and receive operations and put DMA
532 * in idle state.
533 */
534 abortdma(dev);
535
536 /* Disable interrupts */
537 writel(0, ®s->im);
538 writel(0, ®s->ic);
539 writel(0, ®s->iwc);
540
541 /* Disable Port */
542 clrbits_le32(®s->pconf, PCR_EN);
543 }
544
armdfec_send(struct eth_device * dev,void * dataptr,int datasize)545 static int armdfec_send(struct eth_device *dev, void *dataptr, int datasize)
546 {
547 struct armdfec_device *darmdfec = to_darmdfec(dev);
548 struct armdfec_reg *regs = darmdfec->regs;
549 struct tx_desc *p_txdesc = darmdfec->p_txdesc;
550 void *p = (void *)dataptr;
551 int retry = PHY_WAIT_ITERATIONS * PHY_WAIT_MICRO_SECONDS;
552 u32 cmd_sts, temp;
553
554 /* Copy buffer if it's misaligned */
555 if ((u32)dataptr & 0x07) {
556 if (datasize > PKTSIZE_ALIGN) {
557 printf("ARMD100 FEC: Non-aligned data too large (%d)\n",
558 datasize);
559 return -1;
560 }
561 memcpy(darmdfec->p_aligned_txbuf, p, datasize);
562 p = darmdfec->p_aligned_txbuf;
563 }
564
565 p_txdesc->cmd_sts = TX_ZERO_PADDING | TX_GEN_CRC;
566 p_txdesc->cmd_sts |= TX_FIRST_DESC | TX_LAST_DESC;
567 p_txdesc->cmd_sts |= BUF_OWNED_BY_DMA;
568 p_txdesc->cmd_sts |= TX_EN_INT;
569 p_txdesc->buf_ptr = p;
570 p_txdesc->byte_cnt = datasize;
571
572 /* Apply send command using high priority TX queue */
573 temp = (u32)®s->txcdp[TXQ];
574 writel((u32)p_txdesc, temp);
575 writel(SDMA_CMD_TXDL | SDMA_CMD_TXDH | SDMA_CMD_ERD, ®s->sdma_cmd);
576
577 /*
578 * wait for packet xmit completion
579 */
580 cmd_sts = readl(&p_txdesc->cmd_sts);
581 while (cmd_sts & BUF_OWNED_BY_DMA) {
582 /* return fail if error is detected */
583 if ((cmd_sts & (TX_ERROR | TX_LAST_DESC)) ==
584 (TX_ERROR | TX_LAST_DESC)) {
585 printf("ARMD100 FEC: (%s) in xmit packet\n", __func__);
586 return -1;
587 }
588 cmd_sts = readl(&p_txdesc->cmd_sts);
589 if (!(retry--)) {
590 printf("ARMD100 FEC: (%s) xmit packet timeout!\n",
591 __func__);
592 return -1;
593 }
594 }
595
596 return 0;
597 }
598
armdfec_recv(struct eth_device * dev)599 static int armdfec_recv(struct eth_device *dev)
600 {
601 struct armdfec_device *darmdfec = to_darmdfec(dev);
602 struct rx_desc *p_rxdesc_curr = darmdfec->p_rxdesc_curr;
603 u32 cmd_sts;
604 u32 timeout = 0;
605 u32 temp;
606
607 /* wait untill rx packet available or timeout */
608 do {
609 if (timeout < PHY_WAIT_ITERATIONS * PHY_WAIT_MICRO_SECONDS) {
610 timeout++;
611 } else {
612 debug("ARMD100 FEC: %s time out...\n", __func__);
613 return -1;
614 }
615 } while (readl(&p_rxdesc_curr->cmd_sts) & BUF_OWNED_BY_DMA);
616
617 if (p_rxdesc_curr->byte_cnt != 0) {
618 debug("ARMD100 FEC: %s: Received %d byte Packet @ 0x%x"
619 "(cmd_sts= %08x)\n", __func__,
620 (u32)p_rxdesc_curr->byte_cnt,
621 (u32)p_rxdesc_curr->buf_ptr,
622 (u32)p_rxdesc_curr->cmd_sts);
623 }
624
625 /*
626 * In case received a packet without first/last bits on
627 * OR the error summary bit is on,
628 * the packets needs to be dropeed.
629 */
630 cmd_sts = readl(&p_rxdesc_curr->cmd_sts);
631
632 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
633 (RX_FIRST_DESC | RX_LAST_DESC)) {
634 printf("ARMD100 FEC: (%s) Dropping packet spread on"
635 " multiple descriptors\n", __func__);
636 } else if (cmd_sts & RX_ERROR) {
637 printf("ARMD100 FEC: (%s) Dropping packet with errors\n",
638 __func__);
639 } else {
640 /* !!! call higher layer processing */
641 debug("ARMD100 FEC: (%s) Sending Received packet to"
642 " upper layer (net_process_received_packet)\n", __func__);
643
644 /*
645 * let the upper layer handle the packet, subtract offset
646 * as two dummy bytes are added in received buffer see
647 * PORT_CONFIG_EXT register bit TWO_Byte_Stuff_Mode bit.
648 */
649 net_process_received_packet(
650 p_rxdesc_curr->buf_ptr + RX_BUF_OFFSET,
651 (int)(p_rxdesc_curr->byte_cnt - RX_BUF_OFFSET));
652 }
653 /*
654 * free these descriptors and point next in the ring
655 */
656 p_rxdesc_curr->cmd_sts = BUF_OWNED_BY_DMA | RX_EN_INT;
657 p_rxdesc_curr->buf_size = PKTSIZE_ALIGN;
658 p_rxdesc_curr->byte_cnt = 0;
659
660 temp = (u32)&darmdfec->p_rxdesc_curr;
661 writel((u32)p_rxdesc_curr->nxtdesc_p, temp);
662
663 return 0;
664 }
665
armada100_fec_register(unsigned long base_addr)666 int armada100_fec_register(unsigned long base_addr)
667 {
668 struct armdfec_device *darmdfec;
669 struct eth_device *dev;
670
671 darmdfec = malloc(sizeof(struct armdfec_device));
672 if (!darmdfec)
673 goto error;
674
675 memset(darmdfec, 0, sizeof(struct armdfec_device));
676
677 darmdfec->htpr = memalign(8, HASH_ADDR_TABLE_SIZE);
678 if (!darmdfec->htpr)
679 goto error1;
680
681 darmdfec->p_rxdesc = memalign(PKTALIGN,
682 ARMDFEC_RXQ_DESC_ALIGNED_SIZE * RINGSZ + 1);
683
684 if (!darmdfec->p_rxdesc)
685 goto error1;
686
687 darmdfec->p_rxbuf = memalign(PKTALIGN, RINGSZ * PKTSIZE_ALIGN + 1);
688 if (!darmdfec->p_rxbuf)
689 goto error1;
690
691 darmdfec->p_aligned_txbuf = memalign(8, PKTSIZE_ALIGN);
692 if (!darmdfec->p_aligned_txbuf)
693 goto error1;
694
695 darmdfec->p_txdesc = memalign(PKTALIGN, sizeof(struct tx_desc) + 1);
696 if (!darmdfec->p_txdesc)
697 goto error1;
698
699 dev = &darmdfec->dev;
700 /* Assign ARMADA100 Fast Ethernet Controller Base Address */
701 darmdfec->regs = (void *)base_addr;
702
703 /* must be less than sizeof(dev->name) */
704 strcpy(dev->name, "armd-fec0");
705
706 dev->init = armdfec_init;
707 dev->halt = armdfec_halt;
708 dev->send = armdfec_send;
709 dev->recv = armdfec_recv;
710
711 eth_register(dev);
712
713 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
714 int retval;
715 struct mii_dev *mdiodev = mdio_alloc();
716 if (!mdiodev)
717 return -ENOMEM;
718 strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
719 mdiodev->read = smi_reg_read;
720 mdiodev->write = smi_reg_write;
721
722 retval = mdio_register(mdiodev);
723 if (retval < 0)
724 return retval;
725 #endif
726 return 0;
727
728 error1:
729 free(darmdfec->p_aligned_txbuf);
730 free(darmdfec->p_rxbuf);
731 free(darmdfec->p_rxdesc);
732 free(darmdfec->htpr);
733 error:
734 free(darmdfec);
735 printf("AMD100 FEC: (%s) Failed to allocate memory\n", __func__);
736 return -1;
737 }
738