2 * QEMU ETRAX Ethernet Controller.
4 * Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "hw/sysbus.h"
28 #include "hw/cris/etraxfs.h"
32 /* Advertisement control register. */
33 #define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
34 #define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
35 #define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
36 #define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
39 * The MDIO extensions in the TDK PHY model were reversed engineered from the
40 * linux driver (PHYID and Diagnostics reg).
41 * TODO: Add friendly names for the register nums.
49 unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
50 void (*write)(struct qemu_phy *phy, unsigned int req, unsigned int data);
53 static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
66 /* Speeds and modes. */
67 r |= (1 << 13) | (1 << 14);
68 r |= (1 << 11) | (1 << 12);
69 r |= (1 << 5); /* Autoneg complete. */
70 r |= (1 << 3); /* Autoneg able. */
71 r |= (1 << 2); /* link. */
74 /* Link partner ability.
75 We are kind; always agree with whatever best mode
76 the guest advertises. */
77 r = 1 << 14; /* Success. */
78 /* Copy advertised modes. */
79 r |= phy->regs[4] & (15 << 5);
80 /* Autoneg support. */
85 /* Diagnostics reg. */
93 /* Are we advertising 100 half or 100 duplex ? */
94 speed_100 = !!(phy->regs[4] & ADVERTISE_100HALF);
95 speed_100 |= !!(phy->regs[4] & ADVERTISE_100FULL);
97 /* Are we advertising 10 duplex or 100 duplex ? */
98 duplex = !!(phy->regs[4] & ADVERTISE_100FULL);
99 duplex |= !!(phy->regs[4] & ADVERTISE_10FULL);
100 r = (speed_100 << 10) | (duplex << 11);
105 r = phy->regs[regnum];
108 D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
113 tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
118 D(printf("%s reg[%d] = %x\n", __func__, regnum, data));
121 phy->regs[regnum] = data;
127 tdk_init(struct qemu_phy *phy)
129 phy->regs[0] = 0x3100;
131 phy->regs[2] = 0x0300;
132 phy->regs[3] = 0xe400;
133 /* Autonegotiation advertisement reg. */
134 phy->regs[4] = 0x01E1;
137 phy->read = tdk_read;
138 phy->write = tdk_write;
165 struct qemu_phy *devs[32];
169 mdio_attach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
171 bus->devs[addr & 0x1f] = phy;
174 #ifdef USE_THIS_DEAD_CODE
176 mdio_detach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
178 bus->devs[addr & 0x1f] = NULL;
182 static void mdio_read_req(struct qemu_mdio *bus)
184 struct qemu_phy *phy;
186 phy = bus->devs[bus->addr];
187 if (phy && phy->read) {
188 bus->data = phy->read(phy, bus->req);
194 static void mdio_write_req(struct qemu_mdio *bus)
196 struct qemu_phy *phy;
198 phy = bus->devs[bus->addr];
199 if (phy && phy->write) {
200 phy->write(phy, bus->req, bus->data);
204 static void mdio_cycle(struct qemu_mdio *bus)
208 D(printf("mdc=%d mdio=%d state=%d cnt=%d drv=%d\n",
209 bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive));
212 printf("%d", bus->mdio);
215 switch (bus->state) {
218 if (bus->cnt >= (32 * 2) && !bus->mdio) {
227 if (bus->mdio != 1) {
228 printf("WARNING: no SOF\n");
230 if (bus->cnt == 1*2) {
240 bus->opc |= bus->mdio & 1;
241 if (bus->cnt == 2*2) {
251 bus->addr |= bus->mdio & 1;
253 if (bus->cnt == 5*2) {
263 bus->req |= bus->mdio & 1;
264 if (bus->cnt == 5*2) {
266 bus->state = TURNAROUND;
271 if (bus->mdc && bus->cnt == 2*2) {
278 bus->mdio = bus->data & 1;
286 bus->mdio = !!(bus->data & (1 << 15));
292 bus->data |= bus->mdio;
294 if (bus->cnt == 16 * 2) {
296 bus->state = PREAMBLE;
309 /* ETRAX-FS Ethernet MAC block starts here. */
311 #define RW_MA0_LO 0x00
312 #define RW_MA0_HI 0x01
313 #define RW_MA1_LO 0x02
314 #define RW_MA1_HI 0x03
315 #define RW_GA_LO 0x04
316 #define RW_GA_HI 0x05
317 #define RW_GEN_CTRL 0x06
318 #define RW_REC_CTRL 0x07
319 #define RW_TR_CTRL 0x08
320 #define RW_CLR_ERR 0x09
321 #define RW_MGM_CTRL 0x0a
323 #define FS_ETH_MAX_REGS 0x17
325 #define TYPE_ETRAX_FS_ETH "etraxfs-eth"
326 #define ETRAX_FS_ETH(obj) \
327 OBJECT_CHECK(ETRAXFSEthState, (obj), TYPE_ETRAX_FS_ETH)
329 typedef struct ETRAXFSEthState
331 SysBusDevice parent_obj;
337 /* Two addrs in the filter. */
338 uint8_t macaddr[2][6];
339 uint32_t regs[FS_ETH_MAX_REGS];
343 struct etraxfs_dma_client *dma_out;
347 struct etraxfs_dma_client *dma_in;
351 struct qemu_mdio mdio_bus;
352 unsigned int phyaddr;
359 static void eth_validate_duplex(ETRAXFSEthState *eth)
361 struct qemu_phy *phy;
362 unsigned int phy_duplex;
363 unsigned int mac_duplex;
366 phy = eth->mdio_bus.devs[eth->phyaddr];
367 phy_duplex = !!(phy->read(phy, 18) & (1 << 11));
368 mac_duplex = !!(eth->regs[RW_REC_CTRL] & 128);
370 if (mac_duplex != phy_duplex) {
374 if (eth->regs[RW_GEN_CTRL] & 1) {
375 if (new_mm != eth->duplex_mismatch) {
377 printf("HW: WARNING ETH duplex mismatch MAC=%d PHY=%d\n",
378 mac_duplex, phy_duplex);
380 printf("HW: ETH duplex ok.\n");
383 eth->duplex_mismatch = new_mm;
388 eth_read(void *opaque, hwaddr addr, unsigned int size)
390 ETRAXFSEthState *eth = opaque;
397 r = eth->mdio_bus.mdio & 1;
401 D(printf("%s %x\n", __func__, addr * 4));
407 static void eth_update_ma(ETRAXFSEthState *eth, int ma)
419 eth->macaddr[ma][i++] = eth->regs[reg];
420 eth->macaddr[ma][i++] = eth->regs[reg] >> 8;
421 eth->macaddr[ma][i++] = eth->regs[reg] >> 16;
422 eth->macaddr[ma][i++] = eth->regs[reg] >> 24;
423 eth->macaddr[ma][i++] = eth->regs[reg + 1];
424 eth->macaddr[ma][i] = eth->regs[reg + 1] >> 8;
426 D(printf("set mac%d=%x.%x.%x.%x.%x.%x\n", ma,
427 eth->macaddr[ma][0], eth->macaddr[ma][1],
428 eth->macaddr[ma][2], eth->macaddr[ma][3],
429 eth->macaddr[ma][4], eth->macaddr[ma][5]));
433 eth_write(void *opaque, hwaddr addr,
434 uint64_t val64, unsigned int size)
436 ETRAXFSEthState *eth = opaque;
437 uint32_t value = val64;
443 eth->regs[addr] = value;
444 eth_update_ma(eth, 0);
448 eth->regs[addr] = value;
449 eth_update_ma(eth, 1);
453 /* Attach an MDIO/PHY abstraction. */
455 eth->mdio_bus.mdio = value & 1;
457 if (eth->mdio_bus.mdc != (value & 4)) {
458 mdio_cycle(ð->mdio_bus);
459 eth_validate_duplex(eth);
461 eth->mdio_bus.mdc = !!(value & 4);
462 eth->regs[addr] = value;
466 eth->regs[addr] = value;
467 eth_validate_duplex(eth);
471 eth->regs[addr] = value;
472 D(printf("%s %x %x\n", __func__, addr, value));
477 /* The ETRAX FS has a groupt address table (GAT) which works like a k=1 bloom
478 filter dropping group addresses we have not joined. The filter has 64
479 bits (m). The has function is a simple nible xor of the group addr. */
480 static int eth_match_groupaddr(ETRAXFSEthState *eth, const unsigned char *sa)
483 int m_individual = eth->regs[RW_REC_CTRL] & 4;
486 /* First bit on the wire of a MAC address signals multicast or
488 if (!m_individual && !(sa[0] & 1)) {
492 /* Calculate the hash index for the GA registers. */
495 hsh ^= ((*sa) >> 6) & 0x03;
497 hsh ^= ((*sa) << 2) & 0x03c;
498 hsh ^= ((*sa) >> 4) & 0xf;
500 hsh ^= ((*sa) << 4) & 0x30;
501 hsh ^= ((*sa) >> 2) & 0x3f;
504 hsh ^= ((*sa) >> 6) & 0x03;
506 hsh ^= ((*sa) << 2) & 0x03c;
507 hsh ^= ((*sa) >> 4) & 0xf;
509 hsh ^= ((*sa) << 4) & 0x30;
510 hsh ^= ((*sa) >> 2) & 0x3f;
514 match = eth->regs[RW_GA_HI] & (1 << (hsh - 32));
516 match = eth->regs[RW_GA_LO] & (1 << hsh);
518 D(printf("hsh=%x ga=%x.%x mtch=%d\n", hsh,
519 eth->regs[RW_GA_HI], eth->regs[RW_GA_LO], match));
523 static int eth_can_receive(NetClientState *nc)
528 static ssize_t eth_receive(NetClientState *nc, const uint8_t *buf, size_t size)
530 unsigned char sa_bcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
531 ETRAXFSEthState *eth = qemu_get_nic_opaque(nc);
532 int use_ma0 = eth->regs[RW_REC_CTRL] & 1;
533 int use_ma1 = eth->regs[RW_REC_CTRL] & 2;
534 int r_bcast = eth->regs[RW_REC_CTRL] & 8;
540 D(printf("%x.%x.%x.%x.%x.%x ma=%d %d bc=%d\n",
541 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
542 use_ma0, use_ma1, r_bcast));
544 /* Does the frame get through the address filters? */
545 if ((!use_ma0 || memcmp(buf, eth->macaddr[0], 6))
546 && (!use_ma1 || memcmp(buf, eth->macaddr[1], 6))
547 && (!r_bcast || memcmp(buf, sa_bcast, 6))
548 && !eth_match_groupaddr(eth, buf)) {
552 /* FIXME: Find another way to pass on the fake csum. */
553 etraxfs_dmac_input(eth->dma_in, (void *)buf, size + 4, 1);
558 static int eth_tx_push(void *opaque, unsigned char *buf, int len, bool eop)
560 ETRAXFSEthState *eth = opaque;
562 D(printf("%s buf=%p len=%d\n", __func__, buf, len));
563 qemu_send_packet(qemu_get_queue(eth->nic), buf, len);
567 static void eth_set_link(NetClientState *nc)
569 ETRAXFSEthState *eth = qemu_get_nic_opaque(nc);
570 D(printf("%s %d\n", __func__, nc->link_down));
571 eth->phy.link = !nc->link_down;
574 static const MemoryRegionOps eth_ops = {
577 .endianness = DEVICE_LITTLE_ENDIAN,
579 .min_access_size = 4,
584 static void eth_cleanup(NetClientState *nc)
586 ETRAXFSEthState *eth = qemu_get_nic_opaque(nc);
588 /* Disconnect the client. */
589 eth->dma_out->client.push = NULL;
590 eth->dma_out->client.opaque = NULL;
591 eth->dma_in->client.opaque = NULL;
592 eth->dma_in->client.pull = NULL;
596 static NetClientInfo net_etraxfs_info = {
597 .type = NET_CLIENT_OPTIONS_KIND_NIC,
598 .size = sizeof(NICState),
599 .can_receive = eth_can_receive,
600 .receive = eth_receive,
601 .cleanup = eth_cleanup,
602 .link_status_changed = eth_set_link,
605 static int fs_eth_init(SysBusDevice *sbd)
607 DeviceState *dev = DEVICE(sbd);
608 ETRAXFSEthState *s = ETRAX_FS_ETH(dev);
610 if (!s->dma_out || !s->dma_in) {
611 hw_error("Unconnected ETRAX-FS Ethernet MAC.\n");
614 s->dma_out->client.push = eth_tx_push;
615 s->dma_out->client.opaque = s;
616 s->dma_in->client.opaque = s;
617 s->dma_in->client.pull = NULL;
619 memory_region_init_io(&s->mmio, OBJECT(dev), ð_ops, s,
620 "etraxfs-eth", 0x5c);
621 sysbus_init_mmio(sbd, &s->mmio);
623 qemu_macaddr_default_if_unset(&s->conf.macaddr);
624 s->nic = qemu_new_nic(&net_etraxfs_info, &s->conf,
625 object_get_typename(OBJECT(s)), dev->id, s);
626 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
630 mdio_attach(&s->mdio_bus, &s->phy, s->phyaddr);
634 static Property etraxfs_eth_properties[] = {
635 DEFINE_PROP_UINT32("phyaddr", ETRAXFSEthState, phyaddr, 1),
636 DEFINE_PROP_PTR("dma_out", ETRAXFSEthState, vdma_out),
637 DEFINE_PROP_PTR("dma_in", ETRAXFSEthState, vdma_in),
638 DEFINE_NIC_PROPERTIES(ETRAXFSEthState, conf),
639 DEFINE_PROP_END_OF_LIST(),
642 static void etraxfs_eth_class_init(ObjectClass *klass, void *data)
644 DeviceClass *dc = DEVICE_CLASS(klass);
645 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
647 k->init = fs_eth_init;
648 dc->props = etraxfs_eth_properties;
651 static const TypeInfo etraxfs_eth_info = {
652 .name = TYPE_ETRAX_FS_ETH,
653 .parent = TYPE_SYS_BUS_DEVICE,
654 .instance_size = sizeof(ETRAXFSEthState),
655 .class_init = etraxfs_eth_class_init,
658 static void etraxfs_eth_register_types(void)
660 type_register_static(&etraxfs_eth_info);
663 type_init(etraxfs_eth_register_types)