2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * Ethernet media access controller (EMAC)
33 * Chapter 17, Altera Cyclone V Device Handbook (CV-5V2 2014.07.22)
35 * EMAC is an instance of the Synopsys DesignWare 3504-0
36 * Universal 10/100/1000 Ethernet MAC (DWC_gmac).
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/param.h>
43 #include <sys/systm.h>
46 #include <sys/kernel.h>
48 #include <sys/malloc.h>
50 #include <sys/module.h>
51 #include <sys/mutex.h>
53 #include <sys/socket.h>
54 #include <sys/sockio.h>
58 #include <net/ethernet.h>
59 #include <net/if_dl.h>
60 #include <net/if_media.h>
61 #include <net/if_types.h>
62 #include <net/if_var.h>
64 #include <machine/bus.h>
66 #include <dev/dwc/if_dwc.h>
67 #include <dev/dwc/if_dwcvar.h>
68 #include <dev/mii/mii.h>
69 #include <dev/mii/miivar.h>
70 #include <dev/ofw/ofw_bus.h>
71 #include <dev/ofw/ofw_bus_subr.h>
74 #include <dev/extres/clk/clk.h>
75 #include <dev/extres/hwreset/hwreset.h>
78 #include "if_dwc_if.h"
80 #include "miibus_if.h"
82 #define READ4(_sc, _reg) \
83 bus_read_4((_sc)->res[0], _reg)
84 #define WRITE4(_sc, _reg, _val) \
85 bus_write_4((_sc)->res[0], _reg, _val)
87 #define MAC_RESET_TIMEOUT 100
88 #define WATCHDOG_TIMEOUT_SECS 5
89 #define STATS_HARVEST_INTERVAL 2
91 #define DWC_LOCK(sc) mtx_lock(&(sc)->mtx)
92 #define DWC_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
93 #define DWC_ASSERT_LOCKED(sc) mtx_assert(&(sc)->mtx, MA_OWNED)
94 #define DWC_ASSERT_UNLOCKED(sc) mtx_assert(&(sc)->mtx, MA_NOTOWNED)
96 /* TX descriptors - TDESC0 is almost unified */
97 #define TDESC0_OWN (1U << 31)
98 #define TDESC0_IHE (1U << 16) /* IP Header Error */
99 #define TDESC0_ES (1U << 15) /* Error Summary */
100 #define TDESC0_JT (1U << 14) /* Jabber Timeout */
101 #define TDESC0_FF (1U << 13) /* Frame Flushed */
102 #define TDESC0_PCE (1U << 12) /* Payload Checksum Error */
103 #define TDESC0_LOC (1U << 11) /* Loss of Carrier */
104 #define TDESC0_NC (1U << 10) /* No Carrier */
105 #define TDESC0_LC (1U << 9) /* Late Collision */
106 #define TDESC0_EC (1U << 8) /* Excessive Collision */
107 #define TDESC0_VF (1U << 7) /* VLAN Frame */
108 #define TDESC0_CC_MASK 0xf
109 #define TDESC0_CC_SHIFT 3 /* Collision Count */
110 #define TDESC0_ED (1U << 2) /* Excessive Deferral */
111 #define TDESC0_UF (1U << 1) /* Underflow Error */
112 #define TDESC0_DB (1U << 0) /* Deferred Bit */
113 /* TX descriptors - TDESC0 extended format only */
114 #define ETDESC0_IC (1U << 30) /* Interrupt on Completion */
115 #define ETDESC0_LS (1U << 29) /* Last Segment */
116 #define ETDESC0_FS (1U << 28) /* First Segment */
117 #define ETDESC0_DC (1U << 27) /* Disable CRC */
118 #define ETDESC0_DP (1U << 26) /* Disable Padding */
119 #define ETDESC0_CIC_NONE (0U << 22) /* Checksum Insertion Control */
120 #define ETDESC0_CIC_HDR (1U << 22)
121 #define ETDESC0_CIC_SEG (2U << 22)
122 #define ETDESC0_CIC_FULL (3U << 22)
123 #define ETDESC0_TER (1U << 21) /* Transmit End of Ring */
124 #define ETDESC0_TCH (1U << 20) /* Second Address Chained */
126 /* TX descriptors - TDESC1 normal format */
127 #define NTDESC1_IC (1U << 31) /* Interrupt on Completion */
128 #define NTDESC1_LS (1U << 30) /* Last Segment */
129 #define NTDESC1_FS (1U << 29) /* First Segment */
130 #define NTDESC1_CIC_NONE (0U << 27) /* Checksum Insertion Control */
131 #define NTDESC1_CIC_HDR (1U << 27)
132 #define NTDESC1_CIC_SEG (2U << 27)
133 #define NTDESC1_CIC_FULL (3U << 27)
134 #define NTDESC1_DC (1U << 26) /* Disable CRC */
135 #define NTDESC1_TER (1U << 25) /* Transmit End of Ring */
136 #define NTDESC1_TCH (1U << 24) /* Second Address Chained */
137 /* TX descriptors - TDESC1 extended format */
138 #define ETDESC1_DP (1U << 23) /* Disable Padding */
139 #define ETDESC1_TBS2_MASK 0x7ff
140 #define ETDESC1_TBS2_SHIFT 11 /* Receive Buffer 2 Size */
141 #define ETDESC1_TBS1_MASK 0x7ff
142 #define ETDESC1_TBS1_SHIFT 0 /* Receive Buffer 1 Size */
144 /* RX descriptor - RDESC0 is unified */
145 #define RDESC0_OWN (1U << 31)
146 #define RDESC0_AFM (1U << 30) /* Dest. Address Filter Fail */
147 #define RDESC0_FL_MASK 0x3fff
148 #define RDESC0_FL_SHIFT 16 /* Frame Length */
149 #define RDESC0_ES (1U << 15) /* Error Summary */
150 #define RDESC0_DE (1U << 14) /* Descriptor Error */
151 #define RDESC0_SAF (1U << 13) /* Source Address Filter Fail */
152 #define RDESC0_LE (1U << 12) /* Length Error */
153 #define RDESC0_OE (1U << 11) /* Overflow Error */
154 #define RDESC0_VLAN (1U << 10) /* VLAN Tag */
155 #define RDESC0_FS (1U << 9) /* First Descriptor */
156 #define RDESC0_LS (1U << 8) /* Last Descriptor */
157 #define RDESC0_ICE (1U << 7) /* IPC Checksum Error */
158 #define RDESC0_LC (1U << 6) /* Late Collision */
159 #define RDESC0_FT (1U << 5) /* Frame Type */
160 #define RDESC0_RWT (1U << 4) /* Receive Watchdog Timeout */
161 #define RDESC0_RE (1U << 3) /* Receive Error */
162 #define RDESC0_DBE (1U << 2) /* Dribble Bit Error */
163 #define RDESC0_CE (1U << 1) /* CRC Error */
164 #define RDESC0_PCE (1U << 0) /* Payload Checksum Error */
165 #define RDESC0_RXMA (1U << 0) /* Rx MAC Address */
167 /* RX descriptors - RDESC1 normal format */
168 #define NRDESC1_DIC (1U << 31) /* Disable Intr on Completion */
169 #define NRDESC1_RER (1U << 25) /* Receive End of Ring */
170 #define NRDESC1_RCH (1U << 24) /* Second Address Chained */
171 #define NRDESC1_RBS2_MASK 0x7ff
172 #define NRDESC1_RBS2_SHIFT 11 /* Receive Buffer 2 Size */
173 #define NRDESC1_RBS1_MASK 0x7ff
174 #define NRDESC1_RBS1_SHIFT 0 /* Receive Buffer 1 Size */
176 /* RX descriptors - RDESC1 enhanced format */
177 #define ERDESC1_DIC (1U << 31) /* Disable Intr on Completion */
178 #define ERDESC1_RBS2_MASK 0x7ffff
179 #define ERDESC1_RBS2_SHIFT 16 /* Receive Buffer 2 Size */
180 #define ERDESC1_RER (1U << 15) /* Receive End of Ring */
181 #define ERDESC1_RCH (1U << 14) /* Second Address Chained */
182 #define ERDESC1_RBS1_MASK 0x7ffff
183 #define ERDESC1_RBS1_SHIFT 0 /* Receive Buffer 1 Size */
186 * A hardware buffer descriptor. Rx and Tx buffers have the same descriptor
187 * layout, but the bits in the fields have different meanings.
193 uint32_t addr1; /* ptr to first buffer data */
194 uint32_t addr2; /* ptr to next descriptor / second buffer data*/
198 struct dwc_hash_maddr_ctx {
199 struct dwc_softc *sc;
204 * The hardware imposes alignment restrictions on various objects involved in
205 * DMA transfers. These values are expressed in bytes (not bits).
207 #define DWC_DESC_RING_ALIGN 2048
209 static struct resource_spec dwc_spec[] = {
210 { SYS_RES_MEMORY, 0, RF_ACTIVE },
211 { SYS_RES_IRQ, 0, RF_ACTIVE },
215 static void dwc_txfinish_locked(struct dwc_softc *sc);
216 static void dwc_rxfinish_locked(struct dwc_softc *sc);
217 static void dwc_stop_locked(struct dwc_softc *sc);
218 static void dwc_setup_rxfilter(struct dwc_softc *sc);
219 static void dwc_setup_core(struct dwc_softc *sc);
220 static void dwc_enable_mac(struct dwc_softc *sc, bool enable);
221 static void dwc_init_dma(struct dwc_softc *sc);
222 static void dwc_stop_dma(struct dwc_softc *sc);
224 static void dwc_tick(void *arg);
226 /* Pause time field in the transmitted control frame */
227 static int dwc_pause_time = 0xffff;
228 TUNABLE_INT("hw.dwc.pause_time", &dwc_pause_time);
235 dwc_miibus_read_reg(device_t dev, int phy, int reg)
237 struct dwc_softc *sc;
242 sc = device_get_softc(dev);
244 mii = ((phy & GMII_ADDRESS_PA_MASK) << GMII_ADDRESS_PA_SHIFT)
245 | ((reg & GMII_ADDRESS_GR_MASK) << GMII_ADDRESS_GR_SHIFT)
246 | (sc->mii_clk << GMII_ADDRESS_CR_SHIFT)
247 | GMII_ADDRESS_GB; /* Busy flag */
249 WRITE4(sc, GMII_ADDRESS, mii);
251 for (cnt = 0; cnt < 1000; cnt++) {
252 if (!(READ4(sc, GMII_ADDRESS) & GMII_ADDRESS_GB)) {
253 rv = READ4(sc, GMII_DATA);
263 dwc_miibus_write_reg(device_t dev, int phy, int reg, int val)
265 struct dwc_softc *sc;
269 sc = device_get_softc(dev);
271 mii = ((phy & GMII_ADDRESS_PA_MASK) << GMII_ADDRESS_PA_SHIFT)
272 | ((reg & GMII_ADDRESS_GR_MASK) << GMII_ADDRESS_GR_SHIFT)
273 | (sc->mii_clk << GMII_ADDRESS_CR_SHIFT)
274 | GMII_ADDRESS_GB | GMII_ADDRESS_GW;
276 WRITE4(sc, GMII_DATA, val);
277 WRITE4(sc, GMII_ADDRESS, mii);
279 for (cnt = 0; cnt < 1000; cnt++) {
280 if (!(READ4(sc, GMII_ADDRESS) & GMII_ADDRESS_GB)) {
290 dwc_miibus_statchg(device_t dev)
292 struct dwc_softc *sc;
293 struct mii_data *mii;
297 * Called by the MII bus driver when the PHY establishes
298 * link to set the MAC interface registers.
301 sc = device_get_softc(dev);
303 DWC_ASSERT_LOCKED(sc);
307 if (mii->mii_media_status & IFM_ACTIVE)
308 sc->link_is_up = true;
310 sc->link_is_up = false;
312 reg = READ4(sc, MAC_CONFIGURATION);
313 switch (IFM_SUBTYPE(mii->mii_media_active)) {
316 reg &= ~(CONF_FES | CONF_PS);
319 reg |= (CONF_FES | CONF_PS);
326 sc->link_is_up = false;
329 sc->link_is_up = false;
330 device_printf(dev, "Unsupported media %u\n",
331 IFM_SUBTYPE(mii->mii_media_active));
334 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0)
338 WRITE4(sc, MAC_CONFIGURATION, reg);
340 reg = FLOW_CONTROL_UP;
341 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_TXPAUSE) != 0)
342 reg |= FLOW_CONTROL_TX;
343 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_RXPAUSE) != 0)
344 reg |= FLOW_CONTROL_RX;
345 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0)
346 reg |= dwc_pause_time << FLOW_CONTROL_PT_SHIFT;
347 WRITE4(sc, FLOW_CONTROL, reg);
349 IF_DWC_SET_SPEED(dev, IFM_SUBTYPE(mii->mii_media_active));
358 dwc_media_status(struct ifnet * ifp, struct ifmediareq *ifmr)
360 struct dwc_softc *sc;
361 struct mii_data *mii;
367 ifmr->ifm_active = mii->mii_media_active;
368 ifmr->ifm_status = mii->mii_media_status;
373 dwc_media_change_locked(struct dwc_softc *sc)
376 return (mii_mediachg(sc->mii_softc));
380 dwc_media_change(struct ifnet * ifp)
382 struct dwc_softc *sc;
388 error = dwc_media_change_locked(sc);
397 static const uint8_t nibbletab[] = {
398 /* 0x0 0000 -> 0000 */ 0x0,
399 /* 0x1 0001 -> 1000 */ 0x8,
400 /* 0x2 0010 -> 0100 */ 0x4,
401 /* 0x3 0011 -> 1100 */ 0xc,
402 /* 0x4 0100 -> 0010 */ 0x2,
403 /* 0x5 0101 -> 1010 */ 0xa,
404 /* 0x6 0110 -> 0110 */ 0x6,
405 /* 0x7 0111 -> 1110 */ 0xe,
406 /* 0x8 1000 -> 0001 */ 0x1,
407 /* 0x9 1001 -> 1001 */ 0x9,
408 /* 0xa 1010 -> 0101 */ 0x5,
409 /* 0xb 1011 -> 1101 */ 0xd,
410 /* 0xc 1100 -> 0011 */ 0x3,
411 /* 0xd 1101 -> 1011 */ 0xb,
412 /* 0xe 1110 -> 0111 */ 0x7,
413 /* 0xf 1111 -> 1111 */ 0xf, };
416 bitreverse(uint8_t x)
419 return (nibbletab[x & 0xf] << 4) | nibbletab[x >> 4];
423 dwc_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt)
425 struct dwc_hash_maddr_ctx *ctx = arg;
426 uint32_t crc, hashbit, hashreg;
429 crc = ether_crc32_le(LLADDR(sdl), ETHER_ADDR_LEN);
430 /* Take lower 8 bits and reverse it */
431 val = bitreverse(~crc & 0xff);
432 if (ctx->sc->mactype != DWC_GMAC_EXT_DESC)
433 val >>= 2; /* Only need lower 6 bits */
434 hashreg = (val >> 5);
435 hashbit = (val & 31);
436 ctx->hash[hashreg] |= (1 << hashbit);
442 dwc_setup_rxfilter(struct dwc_softc *sc)
444 struct dwc_hash_maddr_ctx ctx;
447 uint32_t ffval, hi, lo;
450 DWC_ASSERT_LOCKED(sc);
453 nhash = sc->mactype != DWC_GMAC_EXT_DESC ? 2 : 8;
456 * Set the multicast (group) filter hash.
458 if ((ifp->if_flags & IFF_ALLMULTI) != 0) {
459 ffval = (FRAME_FILTER_PM);
460 for (i = 0; i < nhash; i++)
463 ffval = (FRAME_FILTER_HMC);
464 for (i = 0; i < nhash; i++)
467 if_foreach_llmaddr(ifp, dwc_hash_maddr, &ctx);
471 * Set the individual address filter hash.
473 if (ifp->if_flags & IFF_PROMISC)
474 ffval |= (FRAME_FILTER_PR);
477 * Set the primary address.
479 eaddr = IF_LLADDR(ifp);
480 lo = eaddr[0] | (eaddr[1] << 8) | (eaddr[2] << 16) |
482 hi = eaddr[4] | (eaddr[5] << 8);
483 WRITE4(sc, MAC_ADDRESS_LOW(0), lo);
484 WRITE4(sc, MAC_ADDRESS_HIGH(0), hi);
485 WRITE4(sc, MAC_FRAME_FILTER, ffval);
486 if (sc->mactype != DWC_GMAC_EXT_DESC) {
487 WRITE4(sc, GMAC_MAC_HTLOW, ctx.hash[0]);
488 WRITE4(sc, GMAC_MAC_HTHIGH, ctx.hash[1]);
490 for (i = 0; i < nhash; i++)
491 WRITE4(sc, HASH_TABLE_REG(i), ctx.hash[i]);
496 dwc_setup_core(struct dwc_softc *sc)
500 DWC_ASSERT_LOCKED(sc);
503 reg = READ4(sc, MAC_CONFIGURATION);
504 reg |= (CONF_JD | CONF_ACS | CONF_BE);
505 WRITE4(sc, MAC_CONFIGURATION, reg);
509 dwc_enable_mac(struct dwc_softc *sc, bool enable)
513 DWC_ASSERT_LOCKED(sc);
514 reg = READ4(sc, MAC_CONFIGURATION);
516 reg |= CONF_TE | CONF_RE;
518 reg &= ~(CONF_TE | CONF_RE);
519 WRITE4(sc, MAC_CONFIGURATION, reg);
523 dwc_get_hwaddr(struct dwc_softc *sc, uint8_t *hwaddr)
525 uint32_t hi, lo, rnd;
528 * Try to recover a MAC address from the running hardware. If there's
529 * something non-zero there, assume the bootloader did the right thing
532 * Otherwise, set the address to a convenient locally assigned address,
533 * 'bsd' + random 24 low-order bits. 'b' is 0x62, which has the locally
534 * assigned bit set, and the broadcast/multicast bit clear.
536 lo = READ4(sc, MAC_ADDRESS_LOW(0));
537 hi = READ4(sc, MAC_ADDRESS_HIGH(0)) & 0xffff;
538 if ((lo != 0xffffffff) || (hi != 0xffff)) {
539 hwaddr[0] = (lo >> 0) & 0xff;
540 hwaddr[1] = (lo >> 8) & 0xff;
541 hwaddr[2] = (lo >> 16) & 0xff;
542 hwaddr[3] = (lo >> 24) & 0xff;
543 hwaddr[4] = (hi >> 0) & 0xff;
544 hwaddr[5] = (hi >> 8) & 0xff;
546 rnd = arc4random() & 0x00ffffff;
550 hwaddr[3] = rnd >> 16;
551 hwaddr[4] = rnd >> 8;
552 hwaddr[5] = rnd >> 0;
561 dwc_init_dma(struct dwc_softc *sc)
565 DWC_ASSERT_LOCKED(sc);
567 /* Initializa DMA and enable transmitters */
568 reg = READ4(sc, OPERATION_MODE);
569 reg |= (MODE_TSF | MODE_OSF | MODE_FUF);
571 reg |= (MODE_RTC_LEV32 << MODE_RTC_SHIFT);
572 WRITE4(sc, OPERATION_MODE, reg);
574 WRITE4(sc, INTERRUPT_ENABLE, INT_EN_DEFAULT);
577 reg = READ4(sc, OPERATION_MODE);
578 reg |= (MODE_ST | MODE_SR);
579 WRITE4(sc, OPERATION_MODE, reg);
583 dwc_stop_dma(struct dwc_softc *sc)
587 DWC_ASSERT_LOCKED(sc);
590 reg = READ4(sc, OPERATION_MODE);
592 WRITE4(sc, OPERATION_MODE, reg);
595 reg = READ4(sc, OPERATION_MODE);
597 WRITE4(sc, OPERATION_MODE, reg);
600 reg = READ4(sc, OPERATION_MODE);
602 WRITE4(sc, OPERATION_MODE, reg);
605 static inline uint32_t
606 next_rxidx(struct dwc_softc *sc, uint32_t curidx)
609 return ((curidx + 1) % RX_DESC_COUNT);
612 static inline uint32_t
613 next_txidx(struct dwc_softc *sc, uint32_t curidx)
616 return ((curidx + 1) % TX_DESC_COUNT);
620 dwc_get1paddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
625 *(bus_addr_t *)arg = segs[0].ds_addr;
629 dwc_setup_txdesc(struct dwc_softc *sc, int idx, bus_addr_t paddr,
630 uint32_t len, uint32_t flags)
632 uint32_t desc0, desc1;
634 /* Addr/len 0 means we're clearing the descriptor after xmit done. */
635 if (paddr == 0 || len == 0) {
640 if (sc->mactype != DWC_GMAC_EXT_DESC) {
642 desc1 = NTDESC1_TCH | NTDESC1_FS | NTDESC1_LS |
643 NTDESC1_IC | len | flags;
645 desc0 = ETDESC0_TCH | ETDESC0_FS | ETDESC0_LS |
652 sc->txdesc_ring[idx].addr1 = (uint32_t)(paddr);
653 sc->txdesc_ring[idx].desc0 = desc0;
654 sc->txdesc_ring[idx].desc1 = desc1;
658 sc->txdesc_ring[idx].desc0 |= TDESC0_OWN;
664 dwc_setup_txbuf(struct dwc_softc *sc, int idx, struct mbuf **mp)
666 struct bus_dma_segment seg;
671 if ((m = m_defrag(*mp, M_NOWAIT)) == NULL)
675 error = bus_dmamap_load_mbuf_sg(sc->txbuf_tag, sc->txbuf_map[idx].map,
681 KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs));
683 bus_dmamap_sync(sc->txbuf_tag, sc->txbuf_map[idx].map,
684 BUS_DMASYNC_PREWRITE);
686 sc->txbuf_map[idx].mbuf = m;
688 if ((m->m_pkthdr.csum_flags & CSUM_IP) != 0) {
689 if ((m->m_pkthdr.csum_flags & (CSUM_TCP|CSUM_UDP)) != 0) {
690 if (sc->mactype != DWC_GMAC_EXT_DESC)
691 flags = NTDESC1_CIC_FULL;
693 flags = ETDESC0_CIC_FULL;
695 if (sc->mactype != DWC_GMAC_EXT_DESC)
696 flags = NTDESC1_CIC_HDR;
698 flags = ETDESC0_CIC_HDR;
702 dwc_setup_txdesc(sc, idx, seg.ds_addr, seg.ds_len, flags);
707 inline static uint32_t
708 dwc_setup_rxdesc(struct dwc_softc *sc, int idx, bus_addr_t paddr)
712 sc->rxdesc_ring[idx].addr1 = (uint32_t)paddr;
713 nidx = next_rxidx(sc, idx);
714 sc->rxdesc_ring[idx].addr2 = sc->rxdesc_ring_paddr +
715 (nidx * sizeof(struct dwc_hwdesc));
716 if (sc->mactype != DWC_GMAC_EXT_DESC)
717 sc->rxdesc_ring[idx].desc1 = NRDESC1_RCH |
718 MIN(MCLBYTES, NRDESC1_RBS1_MASK);
720 sc->rxdesc_ring[idx].desc1 = ERDESC1_RCH |
721 MIN(MCLBYTES, ERDESC1_RBS1_MASK);
724 sc->rxdesc_ring[idx].desc0 = RDESC0_OWN;
730 dwc_setup_rxbuf(struct dwc_softc *sc, int idx, struct mbuf *m)
732 struct bus_dma_segment seg;
735 m_adj(m, ETHER_ALIGN);
737 error = bus_dmamap_load_mbuf_sg(sc->rxbuf_tag, sc->rxbuf_map[idx].map,
742 KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs));
744 bus_dmamap_sync(sc->rxbuf_tag, sc->rxbuf_map[idx].map,
745 BUS_DMASYNC_PREREAD);
747 sc->rxbuf_map[idx].mbuf = m;
748 dwc_setup_rxdesc(sc, idx, seg.ds_addr);
754 dwc_alloc_mbufcl(struct dwc_softc *sc)
758 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
760 m->m_pkthdr.len = m->m_len = m->m_ext.ext_size;
766 dwc_rxfinish_one(struct dwc_softc *sc, struct dwc_hwdesc *desc,
767 struct dwc_bufmap *map)
776 rdesc0 = desc ->desc0;
777 /* Validate descriptor. */
778 if (rdesc0 & RDESC0_ES) {
780 * Errored packet. Statistic counters are updated
781 * globally, so do nothing
786 if ((rdesc0 & (RDESC0_FS | RDESC0_LS)) !=
787 (RDESC0_FS | RDESC0_LS)) {
789 * Something very wrong happens. The whole packet should be
790 * recevied in one descriptr. Report problem.
792 device_printf(sc->dev,
793 "%s: RX descriptor without FIRST and LAST bit set: 0x%08X",
798 len = (rdesc0 >> RDESC0_FL_SHIFT) & RDESC0_FL_MASK;
801 * Lenght is invalid, recycle old mbuf
802 * Probably impossible case
807 /* Allocate new buffer */
808 m0 = dwc_alloc_mbufcl(sc);
810 /* no new mbuf available, recycle old */
811 if_inc_counter(sc->ifp, IFCOUNTER_IQDROPS, 1);
814 /* Do dmasync for newly received packet */
815 bus_dmamap_sync(sc->rxbuf_tag, map->map, BUS_DMASYNC_POSTREAD);
816 bus_dmamap_unload(sc->rxbuf_tag, map->map);
818 /* Received packet is valid, process it */
819 m->m_pkthdr.rcvif = ifp;
820 m->m_pkthdr.len = len;
822 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
824 if ((if_getcapenable(ifp) & IFCAP_RXCSUM) != 0 &&
825 (rdesc0 & RDESC0_FT) != 0) {
826 m->m_pkthdr.csum_flags = CSUM_IP_CHECKED;
827 if ((rdesc0 & RDESC0_ICE) == 0)
828 m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
829 if ((rdesc0 & RDESC0_PCE) == 0) {
830 m->m_pkthdr.csum_flags |=
831 CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
832 m->m_pkthdr.csum_data = 0xffff;
836 /* Remove trailing FCS */
837 m_adj(m, -ETHER_CRC_LEN);
840 (*ifp->if_input)(ifp, m);
846 setup_dma(struct dwc_softc *sc)
854 * Set up TX descriptor ring, descriptors, and dma maps.
856 error = bus_dma_tag_create(
857 bus_get_dma_tag(sc->dev), /* Parent tag. */
858 DWC_DESC_RING_ALIGN, 0, /* alignment, boundary */
859 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
860 BUS_SPACE_MAXADDR, /* highaddr */
861 NULL, NULL, /* filter, filterarg */
862 TX_DESC_SIZE, 1, /* maxsize, nsegments */
863 TX_DESC_SIZE, /* maxsegsize */
865 NULL, NULL, /* lockfunc, lockarg */
868 device_printf(sc->dev,
869 "could not create TX ring DMA tag.\n");
873 error = bus_dmamem_alloc(sc->txdesc_tag, (void**)&sc->txdesc_ring,
874 BUS_DMA_COHERENT | BUS_DMA_WAITOK | BUS_DMA_ZERO,
877 device_printf(sc->dev,
878 "could not allocate TX descriptor ring.\n");
882 error = bus_dmamap_load(sc->txdesc_tag, sc->txdesc_map,
883 sc->txdesc_ring, TX_DESC_SIZE, dwc_get1paddr,
884 &sc->txdesc_ring_paddr, 0);
886 device_printf(sc->dev,
887 "could not load TX descriptor ring map.\n");
891 for (idx = 0; idx < TX_DESC_COUNT; idx++) {
892 nidx = next_txidx(sc, idx);
893 sc->txdesc_ring[idx].addr2 = sc->txdesc_ring_paddr +
894 (nidx * sizeof(struct dwc_hwdesc));
897 error = bus_dma_tag_create(
898 bus_get_dma_tag(sc->dev), /* Parent tag. */
899 1, 0, /* alignment, boundary */
900 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
901 BUS_SPACE_MAXADDR, /* highaddr */
902 NULL, NULL, /* filter, filterarg */
903 MCLBYTES, 1, /* maxsize, nsegments */
904 MCLBYTES, /* maxsegsize */
906 NULL, NULL, /* lockfunc, lockarg */
909 device_printf(sc->dev,
910 "could not create TX ring DMA tag.\n");
914 for (idx = 0; idx < TX_DESC_COUNT; idx++) {
915 error = bus_dmamap_create(sc->txbuf_tag, BUS_DMA_COHERENT,
916 &sc->txbuf_map[idx].map);
918 device_printf(sc->dev,
919 "could not create TX buffer DMA map.\n");
922 dwc_setup_txdesc(sc, idx, 0, 0, 0);
926 * Set up RX descriptor ring, descriptors, dma maps, and mbufs.
928 error = bus_dma_tag_create(
929 bus_get_dma_tag(sc->dev), /* Parent tag. */
930 DWC_DESC_RING_ALIGN, 0, /* alignment, boundary */
931 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
932 BUS_SPACE_MAXADDR, /* highaddr */
933 NULL, NULL, /* filter, filterarg */
934 RX_DESC_SIZE, 1, /* maxsize, nsegments */
935 RX_DESC_SIZE, /* maxsegsize */
937 NULL, NULL, /* lockfunc, lockarg */
940 device_printf(sc->dev,
941 "could not create RX ring DMA tag.\n");
945 error = bus_dmamem_alloc(sc->rxdesc_tag, (void **)&sc->rxdesc_ring,
946 BUS_DMA_COHERENT | BUS_DMA_WAITOK | BUS_DMA_ZERO,
949 device_printf(sc->dev,
950 "could not allocate RX descriptor ring.\n");
954 error = bus_dmamap_load(sc->rxdesc_tag, sc->rxdesc_map,
955 sc->rxdesc_ring, RX_DESC_SIZE, dwc_get1paddr,
956 &sc->rxdesc_ring_paddr, 0);
958 device_printf(sc->dev,
959 "could not load RX descriptor ring map.\n");
963 error = bus_dma_tag_create(
964 bus_get_dma_tag(sc->dev), /* Parent tag. */
965 1, 0, /* alignment, boundary */
966 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
967 BUS_SPACE_MAXADDR, /* highaddr */
968 NULL, NULL, /* filter, filterarg */
969 MCLBYTES, 1, /* maxsize, nsegments */
970 MCLBYTES, /* maxsegsize */
972 NULL, NULL, /* lockfunc, lockarg */
975 device_printf(sc->dev,
976 "could not create RX buf DMA tag.\n");
980 for (idx = 0; idx < RX_DESC_COUNT; idx++) {
981 error = bus_dmamap_create(sc->rxbuf_tag, BUS_DMA_COHERENT,
982 &sc->rxbuf_map[idx].map);
984 device_printf(sc->dev,
985 "could not create RX buffer DMA map.\n");
988 if ((m = dwc_alloc_mbufcl(sc)) == NULL) {
989 device_printf(sc->dev, "Could not alloc mbuf\n");
993 if ((error = dwc_setup_rxbuf(sc, idx, m)) != 0) {
994 device_printf(sc->dev,
995 "could not create new RX buffer.\n");
1012 dwc_txstart_locked(struct dwc_softc *sc)
1018 DWC_ASSERT_LOCKED(sc);
1020 if (!sc->link_is_up)
1025 if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) !=
1032 if (sc->txcount == (TX_DESC_COUNT - 1)) {
1033 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0);
1037 m = if_dequeue(ifp);
1040 if (dwc_setup_txbuf(sc, sc->tx_idx_head, &m) != 0) {
1041 if_sendq_prepend(ifp, m);
1045 sc->tx_idx_head = next_txidx(sc, sc->tx_idx_head);
1049 if (enqueued != 0) {
1050 WRITE4(sc, TRANSMIT_POLL_DEMAND, 0x1);
1051 sc->tx_watchdog_count = WATCHDOG_TIMEOUT_SECS;
1056 dwc_txstart(struct ifnet *ifp)
1058 struct dwc_softc *sc = ifp->if_softc;
1061 dwc_txstart_locked(sc);
1066 dwc_init_locked(struct dwc_softc *sc)
1068 struct ifnet *ifp = sc->ifp;
1070 DWC_ASSERT_LOCKED(sc);
1072 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
1075 dwc_setup_rxfilter(sc);
1077 dwc_enable_mac(sc, true);
1080 if_setdrvflagbits(ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
1083 * Call mii_mediachg() which will call back into dwc_miibus_statchg()
1084 * to set up the remaining config registers based on current media.
1086 mii_mediachg(sc->mii_softc);
1087 callout_reset(&sc->dwc_callout, hz, dwc_tick, sc);
1091 dwc_init(void *if_softc)
1093 struct dwc_softc *sc = if_softc;
1096 dwc_init_locked(sc);
1101 dwc_stop_locked(struct dwc_softc *sc)
1105 DWC_ASSERT_LOCKED(sc);
1108 if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
1109 sc->tx_watchdog_count = 0;
1110 sc->stats_harvest_count = 0;
1112 callout_stop(&sc->dwc_callout);
1115 dwc_enable_mac(sc, false);
1119 dwc_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1121 struct dwc_softc *sc;
1122 struct mii_data *mii;
1124 int flags, mask, error;
1127 ifr = (struct ifreq *)data;
1133 if (if_getflags(ifp) & IFF_UP) {
1134 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
1135 flags = if_getflags(ifp) ^ sc->if_flags;
1136 if ((flags & (IFF_PROMISC|IFF_ALLMULTI)) != 0)
1137 dwc_setup_rxfilter(sc);
1139 if (!sc->is_detaching)
1140 dwc_init_locked(sc);
1143 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
1144 dwc_stop_locked(sc);
1146 sc->if_flags = if_getflags(ifp);
1151 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
1153 dwc_setup_rxfilter(sc);
1159 mii = sc->mii_softc;
1160 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
1163 mask = ifr->ifr_reqcap ^ if_getcapenable(ifp);
1164 if (mask & IFCAP_VLAN_MTU) {
1165 /* No work to do except acknowledge the change took */
1166 if_togglecapenable(ifp, IFCAP_VLAN_MTU);
1168 if (mask & IFCAP_RXCSUM)
1169 if_togglecapenable(ifp, IFCAP_RXCSUM);
1170 if (mask & IFCAP_TXCSUM)
1171 if_togglecapenable(ifp, IFCAP_TXCSUM);
1172 if ((if_getcapenable(ifp) & IFCAP_TXCSUM) != 0)
1173 if_sethwassistbits(ifp, CSUM_IP | CSUM_UDP | CSUM_TCP, 0);
1175 if_sethwassistbits(ifp, 0, CSUM_IP | CSUM_UDP | CSUM_TCP);
1179 error = ether_ioctl(ifp, cmd, data);
1187 * Interrupts functions
1191 dwc_txfinish_locked(struct dwc_softc *sc)
1193 struct dwc_bufmap *bmap;
1194 struct dwc_hwdesc *desc;
1197 DWC_ASSERT_LOCKED(sc);
1200 while (sc->tx_idx_tail != sc->tx_idx_head) {
1201 desc = &sc->txdesc_ring[sc->tx_idx_tail];
1202 if ((desc->desc0 & TDESC0_OWN) != 0)
1204 bmap = &sc->txbuf_map[sc->tx_idx_tail];
1205 bus_dmamap_sync(sc->txbuf_tag, bmap->map,
1206 BUS_DMASYNC_POSTWRITE);
1207 bus_dmamap_unload(sc->txbuf_tag, bmap->map);
1208 m_freem(bmap->mbuf);
1210 dwc_setup_txdesc(sc, sc->tx_idx_tail, 0, 0, 0);
1211 sc->tx_idx_tail = next_txidx(sc, sc->tx_idx_tail);
1212 if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
1213 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1216 /* If there are no buffers outstanding, muzzle the watchdog. */
1217 if (sc->tx_idx_tail == sc->tx_idx_head) {
1218 sc->tx_watchdog_count = 0;
1223 dwc_rxfinish_locked(struct dwc_softc *sc)
1228 struct dwc_hwdesc *desc;
1230 DWC_ASSERT_LOCKED(sc);
1234 desc = sc->rxdesc_ring + idx;
1235 if ((desc->desc0 & RDESC0_OWN) != 0)
1238 m = dwc_rxfinish_one(sc, desc, sc->rxbuf_map + idx);
1241 desc->desc0 = RDESC0_OWN;
1244 /* We cannot create hole in RX ring */
1245 error = dwc_setup_rxbuf(sc, idx, m);
1247 panic("dwc_setup_rxbuf failed: error %d\n",
1251 sc->rx_idx = next_rxidx(sc, sc->rx_idx);
1258 struct dwc_softc *sc;
1265 reg = READ4(sc, INTERRUPT_STATUS);
1267 READ4(sc, SGMII_RGMII_SMII_CTRL_STATUS);
1269 reg = READ4(sc, DMA_STATUS);
1270 if (reg & DMA_STATUS_NIS) {
1271 if (reg & DMA_STATUS_RI)
1272 dwc_rxfinish_locked(sc);
1274 if (reg & DMA_STATUS_TI) {
1275 dwc_txfinish_locked(sc);
1276 dwc_txstart_locked(sc);
1280 if (reg & DMA_STATUS_AIS) {
1281 if (reg & DMA_STATUS_FBI) {
1282 /* Fatal bus error */
1283 device_printf(sc->dev,
1284 "Ethernet DMA error, restarting controller.\n");
1285 dwc_stop_locked(sc);
1286 dwc_init_locked(sc);
1290 WRITE4(sc, DMA_STATUS, reg & DMA_STATUS_INTR_MASK);
1298 static void dwc_clear_stats(struct dwc_softc *sc)
1302 reg = READ4(sc, MMC_CONTROL);
1303 reg |= (MMC_CONTROL_CNTRST);
1304 WRITE4(sc, MMC_CONTROL, reg);
1308 dwc_harvest_stats(struct dwc_softc *sc)
1312 /* We don't need to harvest too often. */
1313 if (++sc->stats_harvest_count < STATS_HARVEST_INTERVAL)
1316 sc->stats_harvest_count = 0;
1319 if_inc_counter(ifp, IFCOUNTER_IPACKETS, READ4(sc, RXFRAMECOUNT_GB));
1320 if_inc_counter(ifp, IFCOUNTER_IMCASTS, READ4(sc, RXMULTICASTFRAMES_G));
1321 if_inc_counter(ifp, IFCOUNTER_IERRORS,
1322 READ4(sc, RXOVERSIZE_G) + READ4(sc, RXUNDERSIZE_G) +
1323 READ4(sc, RXCRCERROR) + READ4(sc, RXALIGNMENTERROR) +
1324 READ4(sc, RXRUNTERROR) + READ4(sc, RXJABBERERROR) +
1325 READ4(sc, RXLENGTHERROR));
1327 if_inc_counter(ifp, IFCOUNTER_OPACKETS, READ4(sc, TXFRAMECOUNT_G));
1328 if_inc_counter(ifp, IFCOUNTER_OMCASTS, READ4(sc, TXMULTICASTFRAMES_G));
1329 if_inc_counter(ifp, IFCOUNTER_OERRORS,
1330 READ4(sc, TXOVERSIZE_G) + READ4(sc, TXEXCESSDEF) +
1331 READ4(sc, TXCARRIERERR) + READ4(sc, TXUNDERFLOWERROR));
1333 if_inc_counter(ifp, IFCOUNTER_COLLISIONS,
1334 READ4(sc, TXEXESSCOL) + READ4(sc, TXLATECOL));
1336 dwc_clear_stats(sc);
1342 struct dwc_softc *sc;
1348 DWC_ASSERT_LOCKED(sc);
1352 if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0)
1356 * Typical tx watchdog. If this fires it indicates that we enqueued
1357 * packets for output and never got a txdone interrupt for them. Maybe
1358 * it's a missed interrupt somehow, just pretend we got one.
1360 if (sc->tx_watchdog_count > 0) {
1361 if (--sc->tx_watchdog_count == 0) {
1362 dwc_txfinish_locked(sc);
1366 /* Gather stats from hardware counters. */
1367 dwc_harvest_stats(sc);
1369 /* Check the media status. */
1370 link_was_up = sc->link_is_up;
1371 mii_tick(sc->mii_softc);
1372 if (sc->link_is_up && !link_was_up)
1373 dwc_txstart_locked(sc);
1375 /* Schedule another check one second from now. */
1376 callout_reset(&sc->dwc_callout, hz, dwc_tick, sc);
1380 * Probe/Attach functions
1383 #define GPIO_ACTIVE_LOW 1
1386 dwc_reset(device_t dev)
1388 pcell_t gpio_prop[4];
1389 pcell_t delay_prop[3];
1390 phandle_t node, gpio_node;
1392 uint32_t pin, flags;
1395 node = ofw_bus_get_node(dev);
1396 if (OF_getencprop(node, "snps,reset-gpio",
1397 gpio_prop, sizeof(gpio_prop)) <= 0)
1400 if (OF_getencprop(node, "snps,reset-delays-us",
1401 delay_prop, sizeof(delay_prop)) <= 0) {
1403 "Wrong property for snps,reset-delays-us");
1407 gpio_node = OF_node_from_xref(gpio_prop[0]);
1408 if ((gpio = OF_device_from_xref(gpio_prop[0])) == NULL) {
1410 "Can't find gpio controller for phy reset\n");
1414 if (GPIO_MAP_GPIOS(gpio, node, gpio_node,
1415 nitems(gpio_prop) - 1,
1416 gpio_prop + 1, &pin, &flags) != 0) {
1417 device_printf(dev, "Can't map gpio for phy reset\n");
1421 pin_value = GPIO_PIN_LOW;
1422 if (OF_hasprop(node, "snps,reset-active-low"))
1423 pin_value = GPIO_PIN_HIGH;
1425 GPIO_PIN_SETFLAGS(gpio, pin, GPIO_PIN_OUTPUT);
1426 GPIO_PIN_SET(gpio, pin, pin_value);
1427 DELAY(delay_prop[0] * 5);
1428 GPIO_PIN_SET(gpio, pin, !pin_value);
1429 DELAY(delay_prop[1] * 5);
1430 GPIO_PIN_SET(gpio, pin, pin_value);
1431 DELAY(delay_prop[2] * 5);
1436 #ifdef EXT_RESOURCES
1438 dwc_clock_init(device_t dev)
1446 if (clk_get_by_ofw_name(dev, 0, "stmmaceth", &clk) == 0) {
1447 error = clk_enable(clk);
1449 device_printf(dev, "could not enable main clock\n");
1453 clk_get_freq(clk, &freq);
1454 device_printf(dev, "MAC clock(%s) freq: %jd\n",
1455 clk_get_name(clk), (intmax_t)freq);
1459 device_printf(dev, "could not find clock stmmaceth\n");
1462 /* De-assert reset */
1463 if (hwreset_get_by_ofw_name(dev, 0, "stmmaceth", &rst) == 0) {
1464 error = hwreset_deassert(rst);
1466 device_printf(dev, "could not de-assert reset\n");
1476 dwc_probe(device_t dev)
1479 if (!ofw_bus_status_okay(dev))
1482 if (!ofw_bus_is_compatible(dev, "snps,dwmac"))
1485 device_set_desc(dev, "Gigabit Ethernet Controller");
1486 return (BUS_PROBE_DEFAULT);
1490 dwc_attach(device_t dev)
1492 uint8_t macaddr[ETHER_ADDR_LEN];
1493 struct dwc_softc *sc;
1499 uint32_t txpbl, rxpbl, pbl;
1500 bool nopblx8 = false;
1501 bool fixed_burst = false;
1503 sc = device_get_softc(dev);
1506 sc->txcount = TX_DESC_COUNT;
1507 sc->mii_clk = IF_DWC_MII_CLK(dev);
1508 sc->mactype = IF_DWC_MAC_TYPE(dev);
1510 node = ofw_bus_get_node(dev);
1511 if (OF_getprop_alloc(node, "phy-mode", (void **)&phy_mode)) {
1512 if (strcmp(phy_mode, "rgmii") == 0)
1513 sc->phy_mode = PHY_MODE_RGMII;
1514 if (strcmp(phy_mode, "rmii") == 0)
1515 sc->phy_mode = PHY_MODE_RMII;
1516 OF_prop_free(phy_mode);
1519 if (OF_getencprop(node, "snps,pbl", &pbl, sizeof(uint32_t)) <= 0)
1520 pbl = BUS_MODE_DEFAULT_PBL;
1521 if (OF_getencprop(node, "snps,txpbl", &txpbl, sizeof(uint32_t)) <= 0)
1523 if (OF_getencprop(node, "snps,rxpbl", &rxpbl, sizeof(uint32_t)) <= 0)
1525 if (OF_hasprop(node, "snps,no-pbl-x8") == 1)
1527 if (OF_hasprop(node, "snps,fixed-burst") == 1)
1530 if (IF_DWC_INIT(dev) != 0)
1533 #ifdef EXT_RESOURCES
1534 if (dwc_clock_init(dev) != 0)
1538 if (bus_alloc_resources(dev, dwc_spec, sc->res)) {
1539 device_printf(dev, "could not allocate resources\n");
1543 /* Read MAC before reset */
1544 dwc_get_hwaddr(sc, macaddr);
1546 /* Reset the PHY if needed */
1547 if (dwc_reset(dev) != 0) {
1548 device_printf(dev, "Can't reset the PHY\n");
1553 reg = READ4(sc, BUS_MODE);
1554 reg |= (BUS_MODE_SWR);
1555 WRITE4(sc, BUS_MODE, reg);
1557 for (i = 0; i < MAC_RESET_TIMEOUT; i++) {
1558 if ((READ4(sc, BUS_MODE) & BUS_MODE_SWR) == 0)
1562 if (i >= MAC_RESET_TIMEOUT) {
1563 device_printf(sc->dev, "Can't reset DWC.\n");
1569 reg |= BUS_MODE_EIGHTXPBL;
1570 reg |= (txpbl << BUS_MODE_PBL_SHIFT);
1571 reg |= (rxpbl << BUS_MODE_RPBL_SHIFT);
1573 reg |= BUS_MODE_FIXEDBURST;
1575 WRITE4(sc, BUS_MODE, reg);
1578 * DMA must be stop while changing descriptor list addresses.
1580 reg = READ4(sc, OPERATION_MODE);
1581 reg &= ~(MODE_ST | MODE_SR);
1582 WRITE4(sc, OPERATION_MODE, reg);
1587 /* Setup addresses */
1588 WRITE4(sc, RX_DESCR_LIST_ADDR, sc->rxdesc_ring_paddr);
1589 WRITE4(sc, TX_DESCR_LIST_ADDR, sc->txdesc_ring_paddr);
1591 mtx_init(&sc->mtx, device_get_nameunit(sc->dev),
1592 MTX_NETWORK_LOCK, MTX_DEF);
1594 callout_init_mtx(&sc->dwc_callout, &sc->mtx, 0);
1596 /* Setup interrupt handler. */
1597 error = bus_setup_intr(dev, sc->res[1], INTR_TYPE_NET | INTR_MPSAFE,
1598 NULL, dwc_intr, sc, &sc->intr_cookie);
1600 device_printf(dev, "could not setup interrupt handler.\n");
1604 /* Set up the ethernet interface. */
1605 sc->ifp = ifp = if_alloc(IFT_ETHER);
1608 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
1609 if_setflags(sc->ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
1610 if_setstartfn(ifp, dwc_txstart);
1611 if_setioctlfn(ifp, dwc_ioctl);
1612 if_setinitfn(ifp, dwc_init);
1613 if_setsendqlen(ifp, TX_DESC_COUNT - 1);
1614 if_setsendqready(sc->ifp);
1615 if_sethwassist(sc->ifp, CSUM_IP | CSUM_UDP | CSUM_TCP);
1616 if_setcapabilities(sc->ifp, IFCAP_VLAN_MTU | IFCAP_HWCSUM);
1617 if_setcapenable(sc->ifp, if_getcapabilities(sc->ifp));
1619 /* Attach the mii driver. */
1620 error = mii_attach(dev, &sc->miibus, ifp, dwc_media_change,
1621 dwc_media_status, BMSR_DEFCAPMASK, MII_PHY_ANY,
1625 device_printf(dev, "PHY attach failed\n");
1628 sc->mii_softc = device_get_softc(sc->miibus);
1630 /* All ready to run, attach the ethernet interface. */
1631 ether_ifattach(ifp, macaddr);
1632 sc->is_attached = true;
1637 static device_method_t dwc_methods[] = {
1638 DEVMETHOD(device_probe, dwc_probe),
1639 DEVMETHOD(device_attach, dwc_attach),
1642 DEVMETHOD(miibus_readreg, dwc_miibus_read_reg),
1643 DEVMETHOD(miibus_writereg, dwc_miibus_write_reg),
1644 DEVMETHOD(miibus_statchg, dwc_miibus_statchg),
1649 driver_t dwc_driver = {
1652 sizeof(struct dwc_softc),
1655 static devclass_t dwc_devclass;
1657 DRIVER_MODULE(dwc, simplebus, dwc_driver, dwc_devclass, 0, 0);
1658 DRIVER_MODULE(miibus, dwc, miibus_driver, miibus_devclass, 0, 0);
1660 MODULE_DEPEND(dwc, ether, 1, 1, 1);
1661 MODULE_DEPEND(dwc, miibus, 1, 1, 1);