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1 | /******************************************************************************* |
2 | This is the driver for the GMAC on-chip Ethernet controller for ST SoCs. | |
3 | DWC Ether MAC 10/100/1000 Universal version 3.41a has been used for | |
4 | developing this code. | |
5 | ||
6 | Copyright (C) 2007-2009 STMicroelectronics Ltd | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify it | |
9 | under the terms and conditions of the GNU General Public License, | |
10 | version 2, as published by the Free Software Foundation. | |
11 | ||
12 | This program is distributed in the hope it will be useful, but WITHOUT | |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
15 | more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License along with | |
18 | this program; if not, write to the Free Software Foundation, Inc., | |
19 | 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
20 | ||
21 | The full GNU General Public License is included in this distribution in | |
22 | the file called "COPYING". | |
23 | ||
24 | Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> | |
25 | *******************************************************************************/ | |
26 | ||
27 | #include <linux/netdevice.h> | |
28 | #include <linux/crc32.h> | |
29 | #include <linux/mii.h> | |
30 | #include <linux/phy.h> | |
31 | ||
32 | #include "stmmac.h" | |
33 | #include "gmac.h" | |
34 | ||
35 | #undef GMAC_DEBUG | |
36 | /*#define GMAC_DEBUG*/ | |
37 | #undef FRAME_FILTER_DEBUG | |
38 | /*#define FRAME_FILTER_DEBUG*/ | |
39 | #ifdef GMAC_DEBUG | |
40 | #define DBG(fmt, args...) printk(fmt, ## args) | |
41 | #else | |
42 | #define DBG(fmt, args...) do { } while (0) | |
43 | #endif | |
44 | ||
45 | static void gmac_dump_regs(unsigned long ioaddr) | |
46 | { | |
47 | int i; | |
48 | pr_info("\t----------------------------------------------\n" | |
49 | "\t GMAC registers (base addr = 0x%8x)\n" | |
50 | "\t----------------------------------------------\n", | |
51 | (unsigned int)ioaddr); | |
52 | ||
53 | for (i = 0; i < 55; i++) { | |
54 | int offset = i * 4; | |
55 | pr_info("\tReg No. %d (offset 0x%x): 0x%08x\n", i, | |
56 | offset, readl(ioaddr + offset)); | |
57 | } | |
58 | return; | |
59 | } | |
60 | ||
61 | static int gmac_dma_init(unsigned long ioaddr, int pbl, u32 dma_tx, u32 dma_rx) | |
62 | { | |
63 | u32 value = readl(ioaddr + DMA_BUS_MODE); | |
64 | /* DMA SW reset */ | |
65 | value |= DMA_BUS_MODE_SFT_RESET; | |
66 | writel(value, ioaddr + DMA_BUS_MODE); | |
67 | do {} while ((readl(ioaddr + DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET)); | |
68 | ||
69 | value = /* DMA_BUS_MODE_FB | */ DMA_BUS_MODE_4PBL | | |
70 | ((pbl << DMA_BUS_MODE_PBL_SHIFT) | | |
71 | (pbl << DMA_BUS_MODE_RPBL_SHIFT)); | |
72 | ||
73 | #ifdef CONFIG_STMMAC_DA | |
74 | value |= DMA_BUS_MODE_DA; /* Rx has priority over tx */ | |
75 | #endif | |
76 | writel(value, ioaddr + DMA_BUS_MODE); | |
77 | ||
78 | /* Mask interrupts by writing to CSR7 */ | |
79 | writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA); | |
80 | ||
81 | /* The base address of the RX/TX descriptor lists must be written into | |
82 | * DMA CSR3 and CSR4, respectively. */ | |
83 | writel(dma_tx, ioaddr + DMA_TX_BASE_ADDR); | |
84 | writel(dma_rx, ioaddr + DMA_RCV_BASE_ADDR); | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | /* Transmit FIFO flush operation */ | |
90 | static void gmac_flush_tx_fifo(unsigned long ioaddr) | |
91 | { | |
92 | u32 csr6 = readl(ioaddr + DMA_CONTROL); | |
93 | writel((csr6 | DMA_CONTROL_FTF), ioaddr + DMA_CONTROL); | |
94 | ||
95 | do {} while ((readl(ioaddr + DMA_CONTROL) & DMA_CONTROL_FTF)); | |
96 | } | |
97 | ||
98 | static void gmac_dma_operation_mode(unsigned long ioaddr, int txmode, | |
99 | int rxmode) | |
100 | { | |
101 | u32 csr6 = readl(ioaddr + DMA_CONTROL); | |
102 | ||
103 | if (txmode == SF_DMA_MODE) { | |
104 | DBG(KERN_DEBUG "GMAC: enabling TX store and forward mode\n"); | |
105 | /* Transmit COE type 2 cannot be done in cut-through mode. */ | |
106 | csr6 |= DMA_CONTROL_TSF; | |
107 | /* Operating on second frame increase the performance | |
108 | * especially when transmit store-and-forward is used.*/ | |
109 | csr6 |= DMA_CONTROL_OSF; | |
110 | } else { | |
111 | DBG(KERN_DEBUG "GMAC: disabling TX store and forward mode" | |
112 | " (threshold = %d)\n", txmode); | |
113 | csr6 &= ~DMA_CONTROL_TSF; | |
114 | csr6 &= DMA_CONTROL_TC_TX_MASK; | |
115 | /* Set the transmit threashold */ | |
116 | if (txmode <= 32) | |
117 | csr6 |= DMA_CONTROL_TTC_32; | |
118 | else if (txmode <= 64) | |
119 | csr6 |= DMA_CONTROL_TTC_64; | |
120 | else if (txmode <= 128) | |
121 | csr6 |= DMA_CONTROL_TTC_128; | |
122 | else if (txmode <= 192) | |
123 | csr6 |= DMA_CONTROL_TTC_192; | |
124 | else | |
125 | csr6 |= DMA_CONTROL_TTC_256; | |
126 | } | |
127 | ||
128 | if (rxmode == SF_DMA_MODE) { | |
129 | DBG(KERN_DEBUG "GMAC: enabling RX store and forward mode\n"); | |
130 | csr6 |= DMA_CONTROL_RSF; | |
131 | } else { | |
132 | DBG(KERN_DEBUG "GMAC: disabling RX store and forward mode" | |
133 | " (threshold = %d)\n", rxmode); | |
134 | csr6 &= ~DMA_CONTROL_RSF; | |
135 | csr6 &= DMA_CONTROL_TC_RX_MASK; | |
136 | if (rxmode <= 32) | |
137 | csr6 |= DMA_CONTROL_RTC_32; | |
138 | else if (rxmode <= 64) | |
139 | csr6 |= DMA_CONTROL_RTC_64; | |
140 | else if (rxmode <= 96) | |
141 | csr6 |= DMA_CONTROL_RTC_96; | |
142 | else | |
143 | csr6 |= DMA_CONTROL_RTC_128; | |
144 | } | |
145 | ||
146 | writel(csr6, ioaddr + DMA_CONTROL); | |
147 | return; | |
148 | } | |
149 | ||
150 | /* Not yet implemented --- no RMON module */ | |
151 | static void gmac_dma_diagnostic_fr(void *data, struct stmmac_extra_stats *x, | |
152 | unsigned long ioaddr) | |
153 | { | |
154 | return; | |
155 | } | |
156 | ||
157 | static void gmac_dump_dma_regs(unsigned long ioaddr) | |
158 | { | |
159 | int i; | |
160 | pr_info(" DMA registers\n"); | |
161 | for (i = 0; i < 22; i++) { | |
162 | if ((i < 9) || (i > 17)) { | |
163 | int offset = i * 4; | |
164 | pr_err("\t Reg No. %d (offset 0x%x): 0x%08x\n", i, | |
165 | (DMA_BUS_MODE + offset), | |
166 | readl(ioaddr + DMA_BUS_MODE + offset)); | |
167 | } | |
168 | } | |
169 | return; | |
170 | } | |
171 | ||
172 | static int gmac_get_tx_frame_status(void *data, struct stmmac_extra_stats *x, | |
173 | struct dma_desc *p, unsigned long ioaddr) | |
174 | { | |
175 | int ret = 0; | |
176 | struct net_device_stats *stats = (struct net_device_stats *)data; | |
177 | ||
178 | if (unlikely(p->des01.etx.error_summary)) { | |
179 | DBG(KERN_ERR "GMAC TX error... 0x%08x\n", p->des01.etx); | |
180 | if (unlikely(p->des01.etx.jabber_timeout)) { | |
181 | DBG(KERN_ERR "\tjabber_timeout error\n"); | |
182 | x->tx_jabber++; | |
183 | } | |
184 | ||
185 | if (unlikely(p->des01.etx.frame_flushed)) { | |
186 | DBG(KERN_ERR "\tframe_flushed error\n"); | |
187 | x->tx_frame_flushed++; | |
188 | gmac_flush_tx_fifo(ioaddr); | |
189 | } | |
190 | ||
191 | if (unlikely(p->des01.etx.loss_carrier)) { | |
192 | DBG(KERN_ERR "\tloss_carrier error\n"); | |
193 | x->tx_losscarrier++; | |
194 | stats->tx_carrier_errors++; | |
195 | } | |
196 | if (unlikely(p->des01.etx.no_carrier)) { | |
197 | DBG(KERN_ERR "\tno_carrier error\n"); | |
198 | x->tx_carrier++; | |
199 | stats->tx_carrier_errors++; | |
200 | } | |
201 | if (unlikely(p->des01.etx.late_collision)) { | |
202 | DBG(KERN_ERR "\tlate_collision error\n"); | |
203 | stats->collisions += p->des01.etx.collision_count; | |
204 | } | |
205 | if (unlikely(p->des01.etx.excessive_collisions)) { | |
206 | DBG(KERN_ERR "\texcessive_collisions\n"); | |
207 | stats->collisions += p->des01.etx.collision_count; | |
208 | } | |
209 | if (unlikely(p->des01.etx.excessive_deferral)) { | |
210 | DBG(KERN_INFO "\texcessive tx_deferral\n"); | |
211 | x->tx_deferred++; | |
212 | } | |
213 | ||
214 | if (unlikely(p->des01.etx.underflow_error)) { | |
215 | DBG(KERN_ERR "\tunderflow error\n"); | |
216 | gmac_flush_tx_fifo(ioaddr); | |
217 | x->tx_underflow++; | |
218 | } | |
219 | ||
220 | if (unlikely(p->des01.etx.ip_header_error)) { | |
221 | DBG(KERN_ERR "\tTX IP header csum error\n"); | |
222 | x->tx_ip_header_error++; | |
223 | } | |
224 | ||
225 | if (unlikely(p->des01.etx.payload_error)) { | |
226 | DBG(KERN_ERR "\tAddr/Payload csum error\n"); | |
227 | x->tx_payload_error++; | |
228 | gmac_flush_tx_fifo(ioaddr); | |
229 | } | |
230 | ||
231 | ret = -1; | |
232 | } | |
233 | ||
234 | if (unlikely(p->des01.etx.deferred)) { | |
235 | DBG(KERN_INFO "GMAC TX status: tx deferred\n"); | |
236 | x->tx_deferred++; | |
237 | } | |
238 | #ifdef STMMAC_VLAN_TAG_USED | |
239 | if (p->des01.etx.vlan_frame) { | |
240 | DBG(KERN_INFO "GMAC TX status: VLAN frame\n"); | |
241 | x->tx_vlan++; | |
242 | } | |
243 | #endif | |
244 | ||
245 | return ret; | |
246 | } | |
247 | ||
248 | static int gmac_get_tx_len(struct dma_desc *p) | |
249 | { | |
250 | return p->des01.etx.buffer1_size; | |
251 | } | |
252 | ||
253 | static int gmac_coe_rdes0(int ipc_err, int type, int payload_err) | |
254 | { | |
255 | int ret = good_frame; | |
256 | u32 status = (type << 2 | ipc_err << 1 | payload_err) & 0x7; | |
257 | ||
258 | /* bits 5 7 0 | Frame status | |
259 | * ---------------------------------------------------------- | |
260 | * 0 0 0 | IEEE 802.3 Type frame (lenght < 1536 octects) | |
261 | * 1 0 0 | IPv4/6 No CSUM errorS. | |
262 | * 1 0 1 | IPv4/6 CSUM PAYLOAD error | |
263 | * 1 1 0 | IPv4/6 CSUM IP HR error | |
264 | * 1 1 1 | IPv4/6 IP PAYLOAD AND HEADER errorS | |
265 | * 0 0 1 | IPv4/6 unsupported IP PAYLOAD | |
266 | * 0 1 1 | COE bypassed.. no IPv4/6 frame | |
267 | * 0 1 0 | Reserved. | |
268 | */ | |
269 | if (status == 0x0) { | |
270 | DBG(KERN_INFO "RX Des0 status: IEEE 802.3 Type frame.\n"); | |
271 | ret = good_frame; | |
272 | } else if (status == 0x4) { | |
273 | DBG(KERN_INFO "RX Des0 status: IPv4/6 No CSUM errorS.\n"); | |
274 | ret = good_frame; | |
275 | } else if (status == 0x5) { | |
276 | DBG(KERN_ERR "RX Des0 status: IPv4/6 Payload Error.\n"); | |
277 | ret = csum_none; | |
278 | } else if (status == 0x6) { | |
279 | DBG(KERN_ERR "RX Des0 status: IPv4/6 Header Error.\n"); | |
280 | ret = csum_none; | |
281 | } else if (status == 0x7) { | |
282 | DBG(KERN_ERR | |
283 | "RX Des0 status: IPv4/6 Header and Payload Error.\n"); | |
284 | ret = csum_none; | |
285 | } else if (status == 0x1) { | |
286 | DBG(KERN_ERR | |
287 | "RX Des0 status: IPv4/6 unsupported IP PAYLOAD.\n"); | |
288 | ret = discard_frame; | |
289 | } else if (status == 0x3) { | |
290 | DBG(KERN_ERR "RX Des0 status: No IPv4, IPv6 frame.\n"); | |
291 | ret = discard_frame; | |
292 | } | |
293 | return ret; | |
294 | } | |
295 | ||
296 | static int gmac_get_rx_frame_status(void *data, struct stmmac_extra_stats *x, | |
297 | struct dma_desc *p) | |
298 | { | |
299 | int ret = good_frame; | |
300 | struct net_device_stats *stats = (struct net_device_stats *)data; | |
301 | ||
302 | if (unlikely(p->des01.erx.error_summary)) { | |
303 | DBG(KERN_ERR "GMAC RX Error Summary... 0x%08x\n", p->des01.erx); | |
304 | if (unlikely(p->des01.erx.descriptor_error)) { | |
305 | DBG(KERN_ERR "\tdescriptor error\n"); | |
306 | x->rx_desc++; | |
307 | stats->rx_length_errors++; | |
308 | } | |
309 | if (unlikely(p->des01.erx.overflow_error)) { | |
310 | DBG(KERN_ERR "\toverflow error\n"); | |
311 | x->rx_gmac_overflow++; | |
312 | } | |
313 | ||
314 | if (unlikely(p->des01.erx.ipc_csum_error)) | |
315 | DBG(KERN_ERR "\tIPC Csum Error/Giant frame\n"); | |
316 | ||
317 | if (unlikely(p->des01.erx.late_collision)) { | |
318 | DBG(KERN_ERR "\tlate_collision error\n"); | |
319 | stats->collisions++; | |
320 | stats->collisions++; | |
321 | } | |
322 | if (unlikely(p->des01.erx.receive_watchdog)) { | |
323 | DBG(KERN_ERR "\treceive_watchdog error\n"); | |
324 | x->rx_watchdog++; | |
325 | } | |
326 | if (unlikely(p->des01.erx.error_gmii)) { | |
327 | DBG(KERN_ERR "\tReceive Error\n"); | |
328 | x->rx_mii++; | |
329 | } | |
330 | if (unlikely(p->des01.erx.crc_error)) { | |
331 | DBG(KERN_ERR "\tCRC error\n"); | |
332 | x->rx_crc++; | |
333 | stats->rx_crc_errors++; | |
334 | } | |
335 | ret = discard_frame; | |
336 | } | |
337 | ||
338 | /* After a payload csum error, the ES bit is set. | |
339 | * It doesn't match with the information reported into the databook. | |
340 | * At any rate, we need to understand if the CSUM hw computation is ok | |
341 | * and report this info to the upper layers. */ | |
342 | ret = gmac_coe_rdes0(p->des01.erx.ipc_csum_error, | |
343 | p->des01.erx.frame_type, p->des01.erx.payload_csum_error); | |
344 | ||
345 | if (unlikely(p->des01.erx.dribbling)) { | |
346 | DBG(KERN_ERR "GMAC RX: dribbling error\n"); | |
347 | ret = discard_frame; | |
348 | } | |
349 | if (unlikely(p->des01.erx.sa_filter_fail)) { | |
350 | DBG(KERN_ERR "GMAC RX : Source Address filter fail\n"); | |
351 | x->sa_rx_filter_fail++; | |
352 | ret = discard_frame; | |
353 | } | |
354 | if (unlikely(p->des01.erx.da_filter_fail)) { | |
355 | DBG(KERN_ERR "GMAC RX : Destination Address filter fail\n"); | |
356 | x->da_rx_filter_fail++; | |
357 | ret = discard_frame; | |
358 | } | |
359 | if (unlikely(p->des01.erx.length_error)) { | |
360 | DBG(KERN_ERR "GMAC RX: length_error error\n"); | |
361 | x->rx_lenght++; | |
362 | ret = discard_frame; | |
363 | } | |
364 | #ifdef STMMAC_VLAN_TAG_USED | |
365 | if (p->des01.erx.vlan_tag) { | |
366 | DBG(KERN_INFO "GMAC RX: VLAN frame tagged\n"); | |
367 | x->rx_vlan++; | |
368 | } | |
369 | #endif | |
370 | return ret; | |
371 | } | |
372 | ||
373 | static void gmac_irq_status(unsigned long ioaddr) | |
374 | { | |
375 | u32 intr_status = readl(ioaddr + GMAC_INT_STATUS); | |
376 | ||
377 | /* Not used events (e.g. MMC interrupts) are not handled. */ | |
378 | if ((intr_status & mmc_tx_irq)) | |
379 | DBG(KERN_DEBUG "GMAC: MMC tx interrupt: 0x%08x\n", | |
380 | readl(ioaddr + GMAC_MMC_TX_INTR)); | |
381 | if (unlikely(intr_status & mmc_rx_irq)) | |
382 | DBG(KERN_DEBUG "GMAC: MMC rx interrupt: 0x%08x\n", | |
383 | readl(ioaddr + GMAC_MMC_RX_INTR)); | |
384 | if (unlikely(intr_status & mmc_rx_csum_offload_irq)) | |
385 | DBG(KERN_DEBUG "GMAC: MMC rx csum offload: 0x%08x\n", | |
386 | readl(ioaddr + GMAC_MMC_RX_CSUM_OFFLOAD)); | |
387 | if (unlikely(intr_status & pmt_irq)) { | |
388 | DBG(KERN_DEBUG "GMAC: received Magic frame\n"); | |
389 | /* clear the PMT bits 5 and 6 by reading the PMT | |
390 | * status register. */ | |
391 | readl(ioaddr + GMAC_PMT); | |
392 | } | |
393 | ||
394 | return; | |
395 | } | |
396 | ||
397 | static void gmac_core_init(unsigned long ioaddr) | |
398 | { | |
399 | u32 value = readl(ioaddr + GMAC_CONTROL); | |
400 | value |= GMAC_CORE_INIT; | |
401 | writel(value, ioaddr + GMAC_CONTROL); | |
402 | ||
403 | /* STBus Bridge Configuration */ | |
404 | /*writel(0xc5608, ioaddr + 0x00007000);*/ | |
405 | ||
406 | /* Freeze MMC counters */ | |
407 | writel(0x8, ioaddr + GMAC_MMC_CTRL); | |
408 | /* Mask GMAC interrupts */ | |
409 | writel(0x207, ioaddr + GMAC_INT_MASK); | |
410 | ||
411 | #ifdef STMMAC_VLAN_TAG_USED | |
412 | /* Tag detection without filtering */ | |
413 | writel(0x0, ioaddr + GMAC_VLAN_TAG); | |
414 | #endif | |
415 | return; | |
416 | } | |
417 | ||
418 | static void gmac_set_umac_addr(unsigned long ioaddr, unsigned char *addr, | |
419 | unsigned int reg_n) | |
420 | { | |
421 | stmmac_set_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n), | |
422 | GMAC_ADDR_LOW(reg_n)); | |
423 | } | |
424 | ||
425 | static void gmac_get_umac_addr(unsigned long ioaddr, unsigned char *addr, | |
426 | unsigned int reg_n) | |
427 | { | |
428 | stmmac_get_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n), | |
429 | GMAC_ADDR_LOW(reg_n)); | |
430 | } | |
431 | ||
432 | static void gmac_set_filter(struct net_device *dev) | |
433 | { | |
434 | unsigned long ioaddr = dev->base_addr; | |
435 | unsigned int value = 0; | |
436 | ||
437 | DBG(KERN_INFO "%s: # mcasts %d, # unicast %d\n", | |
438 | __func__, dev->mc_count, dev->uc_count); | |
439 | ||
440 | if (dev->flags & IFF_PROMISC) | |
441 | value = GMAC_FRAME_FILTER_PR; | |
442 | else if ((dev->mc_count > HASH_TABLE_SIZE) | |
443 | || (dev->flags & IFF_ALLMULTI)) { | |
444 | value = GMAC_FRAME_FILTER_PM; /* pass all multi */ | |
445 | writel(0xffffffff, ioaddr + GMAC_HASH_HIGH); | |
446 | writel(0xffffffff, ioaddr + GMAC_HASH_LOW); | |
447 | } else if (dev->mc_count > 0) { | |
448 | int i; | |
449 | u32 mc_filter[2]; | |
450 | struct dev_mc_list *mclist; | |
451 | ||
452 | /* Hash filter for multicast */ | |
453 | value = GMAC_FRAME_FILTER_HMC; | |
454 | ||
455 | memset(mc_filter, 0, sizeof(mc_filter)); | |
456 | for (i = 0, mclist = dev->mc_list; | |
457 | mclist && i < dev->mc_count; i++, mclist = mclist->next) { | |
458 | /* The upper 6 bits of the calculated CRC are used to | |
459 | index the contens of the hash table */ | |
460 | int bit_nr = | |
461 | bitrev32(~crc32_le(~0, mclist->dmi_addr, 6)) >> 26; | |
462 | /* The most significant bit determines the register to | |
463 | * use (H/L) while the other 5 bits determine the bit | |
464 | * within the register. */ | |
465 | mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); | |
466 | } | |
467 | writel(mc_filter[0], ioaddr + GMAC_HASH_LOW); | |
468 | writel(mc_filter[1], ioaddr + GMAC_HASH_HIGH); | |
469 | } | |
470 | ||
471 | /* Handle multiple unicast addresses (perfect filtering)*/ | |
472 | if (dev->uc_count > GMAC_MAX_UNICAST_ADDRESSES) | |
473 | /* Switch to promiscuous mode is more than 16 addrs | |
474 | are required */ | |
475 | value |= GMAC_FRAME_FILTER_PR; | |
476 | else { | |
477 | int i; | |
478 | struct dev_addr_list *uc_ptr = dev->uc_list; | |
479 | ||
480 | for (i = 0; i < dev->uc_count; i++) { | |
481 | gmac_set_umac_addr(ioaddr, uc_ptr->da_addr, | |
482 | i + 1); | |
483 | ||
484 | DBG(KERN_INFO "\t%d " | |
485 | "- Unicast addr %02x:%02x:%02x:%02x:%02x:" | |
486 | "%02x\n", i + 1, | |
487 | uc_ptr->da_addr[0], uc_ptr->da_addr[1], | |
488 | uc_ptr->da_addr[2], uc_ptr->da_addr[3], | |
489 | uc_ptr->da_addr[4], uc_ptr->da_addr[5]); | |
490 | uc_ptr = uc_ptr->next; | |
491 | } | |
492 | } | |
493 | ||
494 | #ifdef FRAME_FILTER_DEBUG | |
495 | /* Enable Receive all mode (to debug filtering_fail errors) */ | |
496 | value |= GMAC_FRAME_FILTER_RA; | |
497 | #endif | |
498 | writel(value, ioaddr + GMAC_FRAME_FILTER); | |
499 | ||
500 | DBG(KERN_INFO "\tFrame Filter reg: 0x%08x\n\tHash regs: " | |
501 | "HI 0x%08x, LO 0x%08x\n", readl(ioaddr + GMAC_FRAME_FILTER), | |
502 | readl(ioaddr + GMAC_HASH_HIGH), readl(ioaddr + GMAC_HASH_LOW)); | |
503 | ||
504 | return; | |
505 | } | |
506 | ||
507 | static void gmac_flow_ctrl(unsigned long ioaddr, unsigned int duplex, | |
508 | unsigned int fc, unsigned int pause_time) | |
509 | { | |
510 | unsigned int flow = 0; | |
511 | ||
512 | DBG(KERN_DEBUG "GMAC Flow-Control:\n"); | |
513 | if (fc & FLOW_RX) { | |
514 | DBG(KERN_DEBUG "\tReceive Flow-Control ON\n"); | |
515 | flow |= GMAC_FLOW_CTRL_RFE; | |
516 | } | |
517 | if (fc & FLOW_TX) { | |
518 | DBG(KERN_DEBUG "\tTransmit Flow-Control ON\n"); | |
519 | flow |= GMAC_FLOW_CTRL_TFE; | |
520 | } | |
521 | ||
522 | if (duplex) { | |
523 | DBG(KERN_DEBUG "\tduplex mode: pause time: %d\n", pause_time); | |
524 | flow |= (pause_time << GMAC_FLOW_CTRL_PT_SHIFT); | |
525 | } | |
526 | ||
527 | writel(flow, ioaddr + GMAC_FLOW_CTRL); | |
528 | return; | |
529 | } | |
530 | ||
531 | static void gmac_pmt(unsigned long ioaddr, unsigned long mode) | |
532 | { | |
533 | unsigned int pmt = 0; | |
534 | ||
535 | if (mode == WAKE_MAGIC) { | |
536 | DBG(KERN_DEBUG "GMAC: WOL Magic frame\n"); | |
537 | pmt |= power_down | magic_pkt_en; | |
538 | } else if (mode == WAKE_UCAST) { | |
539 | DBG(KERN_DEBUG "GMAC: WOL on global unicast\n"); | |
540 | pmt |= global_unicast; | |
541 | } | |
542 | ||
543 | writel(pmt, ioaddr + GMAC_PMT); | |
544 | return; | |
545 | } | |
546 | ||
547 | static void gmac_init_rx_desc(struct dma_desc *p, unsigned int ring_size, | |
548 | int disable_rx_ic) | |
549 | { | |
550 | int i; | |
551 | for (i = 0; i < ring_size; i++) { | |
552 | p->des01.erx.own = 1; | |
553 | p->des01.erx.buffer1_size = BUF_SIZE_8KiB - 1; | |
554 | /* To support jumbo frames */ | |
555 | p->des01.erx.buffer2_size = BUF_SIZE_8KiB - 1; | |
556 | if (i == ring_size - 1) | |
557 | p->des01.erx.end_ring = 1; | |
558 | if (disable_rx_ic) | |
559 | p->des01.erx.disable_ic = 1; | |
560 | p++; | |
561 | } | |
562 | return; | |
563 | } | |
564 | ||
565 | static void gmac_init_tx_desc(struct dma_desc *p, unsigned int ring_size) | |
566 | { | |
567 | int i; | |
568 | ||
569 | for (i = 0; i < ring_size; i++) { | |
570 | p->des01.etx.own = 0; | |
571 | if (i == ring_size - 1) | |
572 | p->des01.etx.end_ring = 1; | |
573 | p++; | |
574 | } | |
575 | ||
576 | return; | |
577 | } | |
578 | ||
579 | static int gmac_get_tx_owner(struct dma_desc *p) | |
580 | { | |
581 | return p->des01.etx.own; | |
582 | } | |
583 | ||
584 | static int gmac_get_rx_owner(struct dma_desc *p) | |
585 | { | |
586 | return p->des01.erx.own; | |
587 | } | |
588 | ||
589 | static void gmac_set_tx_owner(struct dma_desc *p) | |
590 | { | |
591 | p->des01.etx.own = 1; | |
592 | } | |
593 | ||
594 | static void gmac_set_rx_owner(struct dma_desc *p) | |
595 | { | |
596 | p->des01.erx.own = 1; | |
597 | } | |
598 | ||
599 | static int gmac_get_tx_ls(struct dma_desc *p) | |
600 | { | |
601 | return p->des01.etx.last_segment; | |
602 | } | |
603 | ||
604 | static void gmac_release_tx_desc(struct dma_desc *p) | |
605 | { | |
606 | int ter = p->des01.etx.end_ring; | |
607 | ||
608 | memset(p, 0, sizeof(struct dma_desc)); | |
609 | p->des01.etx.end_ring = ter; | |
610 | ||
611 | return; | |
612 | } | |
613 | ||
614 | static void gmac_prepare_tx_desc(struct dma_desc *p, int is_fs, int len, | |
615 | int csum_flag) | |
616 | { | |
617 | p->des01.etx.first_segment = is_fs; | |
618 | if (unlikely(len > BUF_SIZE_4KiB)) { | |
619 | p->des01.etx.buffer1_size = BUF_SIZE_4KiB; | |
620 | p->des01.etx.buffer2_size = len - BUF_SIZE_4KiB; | |
621 | } else { | |
622 | p->des01.etx.buffer1_size = len; | |
623 | } | |
624 | if (likely(csum_flag)) | |
625 | p->des01.etx.checksum_insertion = cic_full; | |
626 | } | |
627 | ||
628 | static void gmac_clear_tx_ic(struct dma_desc *p) | |
629 | { | |
630 | p->des01.etx.interrupt = 0; | |
631 | } | |
632 | ||
633 | static void gmac_close_tx_desc(struct dma_desc *p) | |
634 | { | |
635 | p->des01.etx.last_segment = 1; | |
636 | p->des01.etx.interrupt = 1; | |
637 | } | |
638 | ||
639 | static int gmac_get_rx_frame_len(struct dma_desc *p) | |
640 | { | |
641 | return p->des01.erx.frame_length; | |
642 | } | |
643 | ||
644 | struct stmmac_ops gmac_driver = { | |
645 | .core_init = gmac_core_init, | |
646 | .dump_mac_regs = gmac_dump_regs, | |
647 | .dma_init = gmac_dma_init, | |
648 | .dump_dma_regs = gmac_dump_dma_regs, | |
649 | .dma_mode = gmac_dma_operation_mode, | |
650 | .dma_diagnostic_fr = gmac_dma_diagnostic_fr, | |
651 | .tx_status = gmac_get_tx_frame_status, | |
652 | .rx_status = gmac_get_rx_frame_status, | |
653 | .get_tx_len = gmac_get_tx_len, | |
654 | .set_filter = gmac_set_filter, | |
655 | .flow_ctrl = gmac_flow_ctrl, | |
656 | .pmt = gmac_pmt, | |
657 | .init_rx_desc = gmac_init_rx_desc, | |
658 | .init_tx_desc = gmac_init_tx_desc, | |
659 | .get_tx_owner = gmac_get_tx_owner, | |
660 | .get_rx_owner = gmac_get_rx_owner, | |
661 | .release_tx_desc = gmac_release_tx_desc, | |
662 | .prepare_tx_desc = gmac_prepare_tx_desc, | |
663 | .clear_tx_ic = gmac_clear_tx_ic, | |
664 | .close_tx_desc = gmac_close_tx_desc, | |
665 | .get_tx_ls = gmac_get_tx_ls, | |
666 | .set_tx_owner = gmac_set_tx_owner, | |
667 | .set_rx_owner = gmac_set_rx_owner, | |
668 | .get_rx_frame_len = gmac_get_rx_frame_len, | |
669 | .host_irq_status = gmac_irq_status, | |
670 | .set_umac_addr = gmac_set_umac_addr, | |
671 | .get_umac_addr = gmac_get_umac_addr, | |
672 | }; | |
673 | ||
674 | struct mac_device_info *gmac_setup(unsigned long ioaddr) | |
675 | { | |
676 | struct mac_device_info *mac; | |
677 | u32 uid = readl(ioaddr + GMAC_VERSION); | |
678 | ||
679 | pr_info("\tGMAC - user ID: 0x%x, Synopsys ID: 0x%x\n", | |
680 | ((uid & 0x0000ff00) >> 8), (uid & 0x000000ff)); | |
681 | ||
682 | mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL); | |
683 | ||
684 | mac->ops = &gmac_driver; | |
685 | mac->hw.pmt = PMT_SUPPORTED; | |
686 | mac->hw.link.port = GMAC_CONTROL_PS; | |
687 | mac->hw.link.duplex = GMAC_CONTROL_DM; | |
688 | mac->hw.link.speed = GMAC_CONTROL_FES; | |
689 | mac->hw.mii.addr = GMAC_MII_ADDR; | |
690 | mac->hw.mii.data = GMAC_MII_DATA; | |
691 | ||
692 | return mac; | |
693 | } |