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79788bb1 AB |
1 | /* |
2 | * (C) Copyright 2011 | |
3 | * eInfochips Ltd. <www.einfochips.com> | |
4 | * Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com> | |
5 | * | |
6 | * (C) Copyright 2010 | |
7 | * Marvell Semiconductor <www.marvell.com> | |
8 | * Contributor: Mahavir Jain <mjain@marvell.com> | |
9 | * | |
1a459660 | 10 | * SPDX-License-Identifier: GPL-2.0+ |
79788bb1 AB |
11 | */ |
12 | ||
13 | #include <common.h> | |
14 | #include <net.h> | |
15 | #include <malloc.h> | |
16 | #include <miiphy.h> | |
17 | #include <netdev.h> | |
18 | #include <asm/types.h> | |
19 | #include <asm/byteorder.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/mii.h> | |
22 | #include <asm/io.h> | |
23 | #include <asm/arch/armada100.h> | |
24 | #include "armada100_fec.h" | |
25 | ||
26 | #define PHY_ADR_REQ 0xFF /* Magic number to read/write PHY address */ | |
27 | ||
28 | #ifdef DEBUG | |
29 | static int eth_dump_regs(struct eth_device *dev) | |
30 | { | |
31 | struct armdfec_device *darmdfec = to_darmdfec(dev); | |
32 | struct armdfec_reg *regs = darmdfec->regs; | |
33 | unsigned int i = 0; | |
34 | ||
35 | printf("\noffset: phy_adr, value: 0x%x\n", readl(®s->phyadr)); | |
36 | printf("offset: smi, value: 0x%x\n", readl(®s->smi)); | |
37 | for (i = 0x400; i <= 0x4e4; i += 4) | |
38 | printf("offset: 0x%x, value: 0x%x\n", | |
39 | i, readl(ARMD1_FEC_BASE + i)); | |
40 | return 0; | |
41 | } | |
42 | #endif | |
43 | ||
44 | static int armdfec_phy_timeout(u32 *reg, u32 flag, int cond) | |
45 | { | |
46 | u32 timeout = PHY_WAIT_ITERATIONS; | |
47 | u32 reg_val; | |
48 | ||
49 | while (--timeout) { | |
50 | reg_val = readl(reg); | |
51 | if (cond && (reg_val & flag)) | |
52 | break; | |
53 | else if (!cond && !(reg_val & flag)) | |
54 | break; | |
55 | udelay(PHY_WAIT_MICRO_SECONDS); | |
56 | } | |
57 | return !timeout; | |
58 | } | |
59 | ||
60 | static int smi_reg_read(const char *devname, u8 phy_addr, u8 phy_reg, | |
61 | u16 *value) | |
62 | { | |
63 | struct eth_device *dev = eth_get_dev_by_name(devname); | |
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 0; | |
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 */ | |
472d5460 | 87 | if (armdfec_phy_timeout(®s->smi, SMI_BUSY, false)) { |
79788bb1 AB |
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 */ | |
472d5460 | 95 | if (armdfec_phy_timeout(®s->smi, SMI_R_VALID, true)) { |
79788bb1 AB |
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 0; | |
105 | } | |
106 | ||
107 | static int smi_reg_write(const char *devname, | |
108 | u8 phy_addr, u8 phy_reg, u16 value) | |
109 | { | |
110 | struct eth_device *dev = eth_get_dev_by_name(devname); | |
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 */ | |
472d5460 | 130 | if (armdfec_phy_timeout(®s->smi, SMI_BUSY, false)) { |
79788bb1 AB |
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 | */ | |
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 | ||
172 | static inline u32 nibble_swapping_32_bit(u32 x) | |
173 | { | |
174 | return ((x & 0xf0f0f0f0) >> 4) | ((x & 0x0f0f0f0f) << 4); | |
175 | } | |
176 | ||
177 | static inline u32 nibble_swapping_16_bit(u32 x) | |
178 | { | |
179 | return ((x & 0x0000f0f0) >> 4) | ((x & 0x00000f0f) << 4); | |
180 | } | |
181 | ||
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 | */ | |
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 | */ | |
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 | */ | |
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 */ | |
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 | */ | |
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 | ||
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 | ||
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; | |
28cb465f | 427 | u32 temp; |
79788bb1 AB |
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 */ | |
28cb465f AB |
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); | |
79788bb1 AB |
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 | ||
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 | ||
74e738e8 | 545 | static int armdfec_send(struct eth_device *dev, void *dataptr, int datasize) |
79788bb1 AB |
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; | |
905b3b00 | 552 | u32 cmd_sts, temp; |
79788bb1 AB |
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 */ | |
905b3b00 MV |
573 | temp = (u32)®s->txcdp[TXQ]; |
574 | writel((u32)p_txdesc, temp); | |
79788bb1 AB |
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 | ||
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; | |
28cb465f | 605 | u32 temp; |
79788bb1 AB |
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" | |
1fd92db8 | 642 | " upper layer (net_process_received_packet)\n", __func__); |
79788bb1 AB |
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 | */ | |
1fd92db8 JH |
649 | net_process_received_packet( |
650 | p_rxdesc_curr->buf_ptr + RX_BUF_OFFSET, | |
651 | (int)(p_rxdesc_curr->byte_cnt - RX_BUF_OFFSET)); | |
79788bb1 AB |
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 | ||
28cb465f AB |
660 | temp = (u32)&darmdfec->p_rxdesc_curr; |
661 | writel((u32)p_rxdesc_curr->nxtdesc_p, temp); | |
79788bb1 AB |
662 | |
663 | return 0; | |
664 | } | |
665 | ||
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 | ||
f6add132 | 703 | /* must be less than sizeof(dev->name) */ |
79788bb1 AB |
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 | miiphy_register(dev->name, smi_reg_read, smi_reg_write); | |
715 | #endif | |
716 | return 0; | |
717 | ||
718 | error1: | |
719 | free(darmdfec->p_aligned_txbuf); | |
720 | free(darmdfec->p_rxbuf); | |
721 | free(darmdfec->p_rxdesc); | |
722 | free(darmdfec->htpr); | |
723 | error: | |
724 | free(darmdfec); | |
725 | printf("AMD100 FEC: (%s) Failed to allocate memory\n", __func__); | |
726 | return -1; | |
727 | } |