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
332 /* Two addrs in the filter. */
333 uint8_t macaddr[2][6];
334 uint32_t regs[FS_ETH_MAX_REGS];
338 struct etraxfs_dma_client *dma_out;
342 struct etraxfs_dma_client *dma_in;
346 struct qemu_mdio mdio_bus;
347 unsigned int phyaddr;
354 static void eth_validate_duplex(struct fs_eth *eth)
356 struct qemu_phy *phy;
357 unsigned int phy_duplex;
358 unsigned int mac_duplex;
361 phy = eth->mdio_bus.devs[eth->phyaddr];
362 phy_duplex = !!(phy->read(phy, 18) & (1 << 11));
363 mac_duplex = !!(eth->regs[RW_REC_CTRL] & 128);
365 if (mac_duplex != phy_duplex) {
369 if (eth->regs[RW_GEN_CTRL] & 1) {
370 if (new_mm != eth->duplex_mismatch) {
372 printf("HW: WARNING ETH duplex mismatch MAC=%d PHY=%d\n",
373 mac_duplex, phy_duplex);
375 printf("HW: ETH duplex ok.\n");
378 eth->duplex_mismatch = new_mm;
383 eth_read(void *opaque, hwaddr addr, unsigned int size)
385 struct fs_eth *eth = opaque;
392 r = eth->mdio_bus.mdio & 1;
396 D(printf("%s %x\n", __func__, addr * 4));
402 static void eth_update_ma(struct fs_eth *eth, int ma)
414 eth->macaddr[ma][i++] = eth->regs[reg];
415 eth->macaddr[ma][i++] = eth->regs[reg] >> 8;
416 eth->macaddr[ma][i++] = eth->regs[reg] >> 16;
417 eth->macaddr[ma][i++] = eth->regs[reg] >> 24;
418 eth->macaddr[ma][i++] = eth->regs[reg + 1];
419 eth->macaddr[ma][i] = eth->regs[reg + 1] >> 8;
421 D(printf("set mac%d=%x.%x.%x.%x.%x.%x\n", ma,
422 eth->macaddr[ma][0], eth->macaddr[ma][1],
423 eth->macaddr[ma][2], eth->macaddr[ma][3],
424 eth->macaddr[ma][4], eth->macaddr[ma][5]));
428 eth_write(void *opaque, hwaddr addr,
429 uint64_t val64, unsigned int size)
431 struct fs_eth *eth = opaque;
432 uint32_t value = val64;
438 eth->regs[addr] = value;
439 eth_update_ma(eth, 0);
443 eth->regs[addr] = value;
444 eth_update_ma(eth, 1);
448 /* Attach an MDIO/PHY abstraction. */
450 eth->mdio_bus.mdio = value & 1;
452 if (eth->mdio_bus.mdc != (value & 4)) {
453 mdio_cycle(ð->mdio_bus);
454 eth_validate_duplex(eth);
456 eth->mdio_bus.mdc = !!(value & 4);
457 eth->regs[addr] = value;
461 eth->regs[addr] = value;
462 eth_validate_duplex(eth);
466 eth->regs[addr] = value;
467 D(printf("%s %x %x\n", __func__, addr, value));
472 /* The ETRAX FS has a groupt address table (GAT) which works like a k=1 bloom
473 filter dropping group addresses we have not joined. The filter has 64
474 bits (m). The has function is a simple nible xor of the group addr. */
475 static int eth_match_groupaddr(struct fs_eth *eth, const unsigned char *sa)
478 int m_individual = eth->regs[RW_REC_CTRL] & 4;
481 /* First bit on the wire of a MAC address signals multicast or
483 if (!m_individual && !(sa[0] & 1)) {
487 /* Calculate the hash index for the GA registers. */
490 hsh ^= ((*sa) >> 6) & 0x03;
492 hsh ^= ((*sa) << 2) & 0x03c;
493 hsh ^= ((*sa) >> 4) & 0xf;
495 hsh ^= ((*sa) << 4) & 0x30;
496 hsh ^= ((*sa) >> 2) & 0x3f;
499 hsh ^= ((*sa) >> 6) & 0x03;
501 hsh ^= ((*sa) << 2) & 0x03c;
502 hsh ^= ((*sa) >> 4) & 0xf;
504 hsh ^= ((*sa) << 4) & 0x30;
505 hsh ^= ((*sa) >> 2) & 0x3f;
509 match = eth->regs[RW_GA_HI] & (1 << (hsh - 32));
511 match = eth->regs[RW_GA_LO] & (1 << hsh);
513 D(printf("hsh=%x ga=%x.%x mtch=%d\n", hsh,
514 eth->regs[RW_GA_HI], eth->regs[RW_GA_LO], match));
518 static int eth_can_receive(NetClientState *nc)
523 static ssize_t eth_receive(NetClientState *nc, const uint8_t *buf, size_t size)
525 unsigned char sa_bcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
526 struct fs_eth *eth = qemu_get_nic_opaque(nc);
527 int use_ma0 = eth->regs[RW_REC_CTRL] & 1;
528 int use_ma1 = eth->regs[RW_REC_CTRL] & 2;
529 int r_bcast = eth->regs[RW_REC_CTRL] & 8;
535 D(printf("%x.%x.%x.%x.%x.%x ma=%d %d bc=%d\n",
536 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
537 use_ma0, use_ma1, r_bcast));
539 /* Does the frame get through the address filters? */
540 if ((!use_ma0 || memcmp(buf, eth->macaddr[0], 6))
541 && (!use_ma1 || memcmp(buf, eth->macaddr[1], 6))
542 && (!r_bcast || memcmp(buf, sa_bcast, 6))
543 && !eth_match_groupaddr(eth, buf)) {
547 /* FIXME: Find another way to pass on the fake csum. */
548 etraxfs_dmac_input(eth->dma_in, (void *)buf, size + 4, 1);
553 static int eth_tx_push(void *opaque, unsigned char *buf, int len, bool eop)
555 struct fs_eth *eth = opaque;
557 D(printf("%s buf=%p len=%d\n", __func__, buf, len));
558 qemu_send_packet(qemu_get_queue(eth->nic), buf, len);
562 static void eth_set_link(NetClientState *nc)
564 struct fs_eth *eth = qemu_get_nic_opaque(nc);
565 D(printf("%s %d\n", __func__, nc->link_down));
566 eth->phy.link = !nc->link_down;
569 static const MemoryRegionOps eth_ops = {
572 .endianness = DEVICE_LITTLE_ENDIAN,
574 .min_access_size = 4,
579 static void eth_cleanup(NetClientState *nc)
581 struct fs_eth *eth = qemu_get_nic_opaque(nc);
583 /* Disconnect the client. */
584 eth->dma_out->client.push = NULL;
585 eth->dma_out->client.opaque = NULL;
586 eth->dma_in->client.opaque = NULL;
587 eth->dma_in->client.pull = NULL;
591 static NetClientInfo net_etraxfs_info = {
592 .type = NET_CLIENT_OPTIONS_KIND_NIC,
593 .size = sizeof(NICState),
594 .can_receive = eth_can_receive,
595 .receive = eth_receive,
596 .cleanup = eth_cleanup,
597 .link_status_changed = eth_set_link,
600 static int fs_eth_init(SysBusDevice *dev)
602 struct fs_eth *s = FROM_SYSBUS(typeof(*s), dev);
604 if (!s->dma_out || !s->dma_in) {
605 hw_error("Unconnected ETRAX-FS Ethernet MAC.\n");
608 s->dma_out->client.push = eth_tx_push;
609 s->dma_out->client.opaque = s;
610 s->dma_in->client.opaque = s;
611 s->dma_in->client.pull = NULL;
613 memory_region_init_io(&s->mmio, ð_ops, s, "etraxfs-eth", 0x5c);
614 sysbus_init_mmio(dev, &s->mmio);
616 qemu_macaddr_default_if_unset(&s->conf.macaddr);
617 s->nic = qemu_new_nic(&net_etraxfs_info, &s->conf,
618 object_get_typename(OBJECT(s)), dev->qdev.id, s);
619 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
623 mdio_attach(&s->mdio_bus, &s->phy, s->phyaddr);
627 static Property etraxfs_eth_properties[] = {
628 DEFINE_PROP_UINT32("phyaddr", struct fs_eth, phyaddr, 1),
629 DEFINE_PROP_PTR("dma_out", struct fs_eth, vdma_out),
630 DEFINE_PROP_PTR("dma_in", struct fs_eth, vdma_in),
631 DEFINE_NIC_PROPERTIES(struct fs_eth, conf),
632 DEFINE_PROP_END_OF_LIST(),
635 static void etraxfs_eth_class_init(ObjectClass *klass, void *data)
637 DeviceClass *dc = DEVICE_CLASS(klass);
638 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
640 k->init = fs_eth_init;
641 dc->props = etraxfs_eth_properties;
644 static const TypeInfo etraxfs_eth_info = {
645 .name = "etraxfs-eth",
646 .parent = TYPE_SYS_BUS_DEVICE,
647 .instance_size = sizeof(struct fs_eth),
648 .class_init = etraxfs_eth_class_init,
651 static void etraxfs_eth_register_types(void)
653 type_register_static(&etraxfs_eth_info);
656 type_init(etraxfs_eth_register_types)