8da3ff1809
Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5849 c046a42c-6fe2-441c-8c8c-71466251a162
608 lines
13 KiB
C
608 lines
13 KiB
C
/*
|
|
* QEMU ETRAX Ethernet Controller.
|
|
*
|
|
* Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "hw.h"
|
|
#include "net.h"
|
|
|
|
#include "etraxfs_dma.h"
|
|
|
|
#define D(x)
|
|
|
|
/* Advertisement control register. */
|
|
#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
|
|
#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
|
|
#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
|
|
#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
|
|
|
|
/*
|
|
* The MDIO extensions in the TDK PHY model were reversed engineered from the
|
|
* linux driver (PHYID and Diagnostics reg).
|
|
* TODO: Add friendly names for the register nums.
|
|
*/
|
|
struct qemu_phy
|
|
{
|
|
uint32_t regs[32];
|
|
|
|
unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
|
|
void (*write)(struct qemu_phy *phy, unsigned int req,
|
|
unsigned int data);
|
|
};
|
|
|
|
static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
|
|
{
|
|
int regnum;
|
|
unsigned r = 0;
|
|
|
|
regnum = req & 0x1f;
|
|
|
|
switch (regnum) {
|
|
case 1:
|
|
/* MR1. */
|
|
/* Speeds and modes. */
|
|
r |= (1 << 13) | (1 << 14);
|
|
r |= (1 << 11) | (1 << 12);
|
|
r |= (1 << 5); /* Autoneg complete. */
|
|
r |= (1 << 3); /* Autoneg able. */
|
|
r |= (1 << 2); /* Link. */
|
|
break;
|
|
case 5:
|
|
/* Link partner ability.
|
|
We are kind; always agree with whatever best mode
|
|
the guest advertises. */
|
|
r = 1 << 14; /* Success. */
|
|
/* Copy advertised modes. */
|
|
r |= phy->regs[4] & (15 << 5);
|
|
/* Autoneg support. */
|
|
r |= 1;
|
|
break;
|
|
case 18:
|
|
{
|
|
/* Diagnostics reg. */
|
|
int duplex = 0;
|
|
int speed_100 = 0;
|
|
|
|
/* Are we advertising 100 half or 100 duplex ? */
|
|
speed_100 = !!(phy->regs[4] & ADVERTISE_100HALF);
|
|
speed_100 |= !!(phy->regs[4] & ADVERTISE_100FULL);
|
|
|
|
/* Are we advertising 10 duplex or 100 duplex ? */
|
|
duplex = !!(phy->regs[4] & ADVERTISE_100FULL);
|
|
duplex |= !!(phy->regs[4] & ADVERTISE_10FULL);
|
|
r = (speed_100 << 10) | (duplex << 11);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
r = phy->regs[regnum];
|
|
break;
|
|
}
|
|
D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
|
|
return r;
|
|
}
|
|
|
|
static void
|
|
tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
|
|
{
|
|
int regnum;
|
|
|
|
regnum = req & 0x1f;
|
|
D(printf("%s reg[%d] = %x\n", __func__, regnum, data));
|
|
switch (regnum) {
|
|
default:
|
|
phy->regs[regnum] = data;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
tdk_init(struct qemu_phy *phy)
|
|
{
|
|
phy->regs[0] = 0x3100;
|
|
/* PHY Id. */
|
|
phy->regs[2] = 0x0300;
|
|
phy->regs[3] = 0xe400;
|
|
/* Autonegotiation advertisement reg. */
|
|
phy->regs[4] = 0x01E1;
|
|
|
|
phy->read = tdk_read;
|
|
phy->write = tdk_write;
|
|
}
|
|
|
|
struct qemu_mdio
|
|
{
|
|
/* bus. */
|
|
int mdc;
|
|
int mdio;
|
|
|
|
/* decoder. */
|
|
enum {
|
|
PREAMBLE,
|
|
SOF,
|
|
OPC,
|
|
ADDR,
|
|
REQ,
|
|
TURNAROUND,
|
|
DATA
|
|
} state;
|
|
unsigned int drive;
|
|
|
|
unsigned int cnt;
|
|
unsigned int addr;
|
|
unsigned int opc;
|
|
unsigned int req;
|
|
unsigned int data;
|
|
|
|
struct qemu_phy *devs[32];
|
|
};
|
|
|
|
static void
|
|
mdio_attach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
|
|
{
|
|
bus->devs[addr & 0x1f] = phy;
|
|
}
|
|
|
|
#ifdef USE_THIS_DEAD_CODE
|
|
static void
|
|
mdio_detach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
|
|
{
|
|
bus->devs[addr & 0x1f] = NULL;
|
|
}
|
|
#endif
|
|
|
|
static void mdio_read_req(struct qemu_mdio *bus)
|
|
{
|
|
struct qemu_phy *phy;
|
|
|
|
phy = bus->devs[bus->addr];
|
|
if (phy && phy->read)
|
|
bus->data = phy->read(phy, bus->req);
|
|
else
|
|
bus->data = 0xffff;
|
|
}
|
|
|
|
static void mdio_write_req(struct qemu_mdio *bus)
|
|
{
|
|
struct qemu_phy *phy;
|
|
|
|
phy = bus->devs[bus->addr];
|
|
if (phy && phy->write)
|
|
phy->write(phy, bus->req, bus->data);
|
|
}
|
|
|
|
static void mdio_cycle(struct qemu_mdio *bus)
|
|
{
|
|
bus->cnt++;
|
|
|
|
D(printf("mdc=%d mdio=%d state=%d cnt=%d drv=%d\n",
|
|
bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive));
|
|
#if 0
|
|
if (bus->mdc)
|
|
printf("%d", bus->mdio);
|
|
#endif
|
|
switch (bus->state)
|
|
{
|
|
case PREAMBLE:
|
|
if (bus->mdc) {
|
|
if (bus->cnt >= (32 * 2) && !bus->mdio) {
|
|
bus->cnt = 0;
|
|
bus->state = SOF;
|
|
bus->data = 0;
|
|
}
|
|
}
|
|
break;
|
|
case SOF:
|
|
if (bus->mdc) {
|
|
if (bus->mdio != 1)
|
|
printf("WARNING: no SOF\n");
|
|
if (bus->cnt == 1*2) {
|
|
bus->cnt = 0;
|
|
bus->opc = 0;
|
|
bus->state = OPC;
|
|
}
|
|
}
|
|
break;
|
|
case OPC:
|
|
if (bus->mdc) {
|
|
bus->opc <<= 1;
|
|
bus->opc |= bus->mdio & 1;
|
|
if (bus->cnt == 2*2) {
|
|
bus->cnt = 0;
|
|
bus->addr = 0;
|
|
bus->state = ADDR;
|
|
}
|
|
}
|
|
break;
|
|
case ADDR:
|
|
if (bus->mdc) {
|
|
bus->addr <<= 1;
|
|
bus->addr |= bus->mdio & 1;
|
|
|
|
if (bus->cnt == 5*2) {
|
|
bus->cnt = 0;
|
|
bus->req = 0;
|
|
bus->state = REQ;
|
|
}
|
|
}
|
|
break;
|
|
case REQ:
|
|
if (bus->mdc) {
|
|
bus->req <<= 1;
|
|
bus->req |= bus->mdio & 1;
|
|
if (bus->cnt == 5*2) {
|
|
bus->cnt = 0;
|
|
bus->state = TURNAROUND;
|
|
}
|
|
}
|
|
break;
|
|
case TURNAROUND:
|
|
if (bus->mdc && bus->cnt == 2*2) {
|
|
bus->mdio = 0;
|
|
bus->cnt = 0;
|
|
|
|
if (bus->opc == 2) {
|
|
bus->drive = 1;
|
|
mdio_read_req(bus);
|
|
bus->mdio = bus->data & 1;
|
|
}
|
|
bus->state = DATA;
|
|
}
|
|
break;
|
|
case DATA:
|
|
if (!bus->mdc) {
|
|
if (bus->drive) {
|
|
bus->mdio = !!(bus->data & (1 << 15));
|
|
bus->data <<= 1;
|
|
}
|
|
} else {
|
|
if (!bus->drive) {
|
|
bus->data <<= 1;
|
|
bus->data |= bus->mdio;
|
|
}
|
|
if (bus->cnt == 16 * 2) {
|
|
bus->cnt = 0;
|
|
bus->state = PREAMBLE;
|
|
if (!bus->drive)
|
|
mdio_write_req(bus);
|
|
bus->drive = 0;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* ETRAX-FS Ethernet MAC block starts here. */
|
|
|
|
#define RW_MA0_LO 0x00
|
|
#define RW_MA0_HI 0x04
|
|
#define RW_MA1_LO 0x08
|
|
#define RW_MA1_HI 0x0c
|
|
#define RW_GA_LO 0x10
|
|
#define RW_GA_HI 0x14
|
|
#define RW_GEN_CTRL 0x18
|
|
#define RW_REC_CTRL 0x1c
|
|
#define RW_TR_CTRL 0x20
|
|
#define RW_CLR_ERR 0x24
|
|
#define RW_MGM_CTRL 0x28
|
|
#define R_STAT 0x2c
|
|
#define FS_ETH_MAX_REGS 0x5c
|
|
|
|
struct fs_eth
|
|
{
|
|
CPUState *env;
|
|
qemu_irq *irq;
|
|
VLANClientState *vc;
|
|
int ethregs;
|
|
|
|
/* Two addrs in the filter. */
|
|
uint8_t macaddr[2][6];
|
|
uint32_t regs[FS_ETH_MAX_REGS];
|
|
|
|
struct etraxfs_dma_client *dma_out;
|
|
struct etraxfs_dma_client *dma_in;
|
|
|
|
/* MDIO bus. */
|
|
struct qemu_mdio mdio_bus;
|
|
unsigned int phyaddr;
|
|
int duplex_mismatch;
|
|
|
|
/* PHY. */
|
|
struct qemu_phy phy;
|
|
};
|
|
|
|
static void eth_validate_duplex(struct fs_eth *eth)
|
|
{
|
|
struct qemu_phy *phy;
|
|
unsigned int phy_duplex;
|
|
unsigned int mac_duplex;
|
|
int new_mm = 0;
|
|
|
|
phy = eth->mdio_bus.devs[eth->phyaddr];
|
|
phy_duplex = !!(phy->read(phy, 18) & (1 << 11));
|
|
mac_duplex = !!(eth->regs[RW_REC_CTRL] & 128);
|
|
|
|
if (mac_duplex != phy_duplex)
|
|
new_mm = 1;
|
|
|
|
if (eth->regs[RW_GEN_CTRL] & 1) {
|
|
if (new_mm != eth->duplex_mismatch) {
|
|
if (new_mm)
|
|
printf("HW: WARNING "
|
|
"ETH duplex mismatch MAC=%d PHY=%d\n",
|
|
mac_duplex, phy_duplex);
|
|
else
|
|
printf("HW: ETH duplex ok.\n");
|
|
}
|
|
eth->duplex_mismatch = new_mm;
|
|
}
|
|
}
|
|
|
|
static uint32_t eth_rinvalid (void *opaque, target_phys_addr_t addr)
|
|
{
|
|
struct fs_eth *eth = opaque;
|
|
CPUState *env = eth->env;
|
|
cpu_abort(env, "Unsupported short access. reg=" TARGET_FMT_plx "\n",
|
|
addr);
|
|
return 0;
|
|
}
|
|
|
|
static uint32_t eth_readl (void *opaque, target_phys_addr_t addr)
|
|
{
|
|
struct fs_eth *eth = opaque;
|
|
uint32_t r = 0;
|
|
|
|
switch (addr) {
|
|
case R_STAT:
|
|
/* Attach an MDIO/PHY abstraction. */
|
|
r = eth->mdio_bus.mdio & 1;
|
|
break;
|
|
default:
|
|
r = eth->regs[addr];
|
|
D(printf ("%s %x\n", __func__, addr));
|
|
break;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static void
|
|
eth_winvalid (void *opaque, target_phys_addr_t addr, uint32_t value)
|
|
{
|
|
struct fs_eth *eth = opaque;
|
|
CPUState *env = eth->env;
|
|
cpu_abort(env, "Unsupported short access. reg=" TARGET_FMT_plx "\n",
|
|
addr);
|
|
}
|
|
|
|
static void eth_update_ma(struct fs_eth *eth, int ma)
|
|
{
|
|
int reg;
|
|
int i = 0;
|
|
|
|
ma &= 1;
|
|
|
|
reg = RW_MA0_LO;
|
|
if (ma)
|
|
reg = RW_MA1_LO;
|
|
|
|
eth->macaddr[ma][i++] = eth->regs[reg];
|
|
eth->macaddr[ma][i++] = eth->regs[reg] >> 8;
|
|
eth->macaddr[ma][i++] = eth->regs[reg] >> 16;
|
|
eth->macaddr[ma][i++] = eth->regs[reg] >> 24;
|
|
eth->macaddr[ma][i++] = eth->regs[reg + 4];
|
|
eth->macaddr[ma][i++] = eth->regs[reg + 4] >> 8;
|
|
|
|
D(printf("set mac%d=%x.%x.%x.%x.%x.%x\n", ma,
|
|
eth->macaddr[ma][0], eth->macaddr[ma][1],
|
|
eth->macaddr[ma][2], eth->macaddr[ma][3],
|
|
eth->macaddr[ma][4], eth->macaddr[ma][5]));
|
|
}
|
|
|
|
static void
|
|
eth_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
|
|
{
|
|
struct fs_eth *eth = opaque;
|
|
|
|
switch (addr)
|
|
{
|
|
case RW_MA0_LO:
|
|
eth->regs[addr] = value;
|
|
eth_update_ma(eth, 0);
|
|
break;
|
|
case RW_MA0_HI:
|
|
eth->regs[addr] = value;
|
|
eth_update_ma(eth, 0);
|
|
break;
|
|
case RW_MA1_LO:
|
|
eth->regs[addr] = value;
|
|
eth_update_ma(eth, 1);
|
|
break;
|
|
case RW_MA1_HI:
|
|
eth->regs[addr] = value;
|
|
eth_update_ma(eth, 1);
|
|
break;
|
|
|
|
case RW_MGM_CTRL:
|
|
/* Attach an MDIO/PHY abstraction. */
|
|
if (value & 2)
|
|
eth->mdio_bus.mdio = value & 1;
|
|
if (eth->mdio_bus.mdc != (value & 4)) {
|
|
mdio_cycle(ð->mdio_bus);
|
|
eth_validate_duplex(eth);
|
|
}
|
|
eth->mdio_bus.mdc = !!(value & 4);
|
|
break;
|
|
|
|
case RW_REC_CTRL:
|
|
eth->regs[addr] = value;
|
|
eth_validate_duplex(eth);
|
|
break;
|
|
|
|
default:
|
|
eth->regs[addr] = value;
|
|
D(printf ("%s %x %x\n",
|
|
__func__, addr, value));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* The ETRAX FS has a groupt address table (GAT) which works like a k=1 bloom
|
|
filter dropping group addresses we have not joined. The filter has 64
|
|
bits (m). The has function is a simple nible xor of the group addr. */
|
|
static int eth_match_groupaddr(struct fs_eth *eth, const unsigned char *sa)
|
|
{
|
|
unsigned int hsh;
|
|
int m_individual = eth->regs[RW_REC_CTRL] & 4;
|
|
int match;
|
|
|
|
/* First bit on the wire of a MAC address signals multicast or
|
|
physical address. */
|
|
if (!m_individual && !sa[0] & 1)
|
|
return 0;
|
|
|
|
/* Calculate the hash index for the GA registers. */
|
|
hsh = 0;
|
|
hsh ^= (*sa) & 0x3f;
|
|
hsh ^= ((*sa) >> 6) & 0x03;
|
|
++sa;
|
|
hsh ^= ((*sa) << 2) & 0x03c;
|
|
hsh ^= ((*sa) >> 4) & 0xf;
|
|
++sa;
|
|
hsh ^= ((*sa) << 4) & 0x30;
|
|
hsh ^= ((*sa) >> 2) & 0x3f;
|
|
++sa;
|
|
hsh ^= (*sa) & 0x3f;
|
|
hsh ^= ((*sa) >> 6) & 0x03;
|
|
++sa;
|
|
hsh ^= ((*sa) << 2) & 0x03c;
|
|
hsh ^= ((*sa) >> 4) & 0xf;
|
|
++sa;
|
|
hsh ^= ((*sa) << 4) & 0x30;
|
|
hsh ^= ((*sa) >> 2) & 0x3f;
|
|
|
|
hsh &= 63;
|
|
if (hsh > 31)
|
|
match = eth->regs[RW_GA_HI] & (1 << (hsh - 32));
|
|
else
|
|
match = eth->regs[RW_GA_LO] & (1 << hsh);
|
|
D(printf("hsh=%x ga=%x.%x mtch=%d\n", hsh,
|
|
eth->regs[RW_GA_HI], eth->regs[RW_GA_LO], match));
|
|
return match;
|
|
}
|
|
|
|
static int eth_can_receive(void *opaque)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void eth_receive(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
unsigned char sa_bcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
|
|
struct fs_eth *eth = opaque;
|
|
int use_ma0 = eth->regs[RW_REC_CTRL] & 1;
|
|
int use_ma1 = eth->regs[RW_REC_CTRL] & 2;
|
|
int r_bcast = eth->regs[RW_REC_CTRL] & 8;
|
|
|
|
if (size < 12)
|
|
return;
|
|
|
|
D(printf("%x.%x.%x.%x.%x.%x ma=%d %d bc=%d\n",
|
|
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
|
|
use_ma0, use_ma1, r_bcast));
|
|
|
|
/* Does the frame get through the address filters? */
|
|
if ((!use_ma0 || memcmp(buf, eth->macaddr[0], 6))
|
|
&& (!use_ma1 || memcmp(buf, eth->macaddr[1], 6))
|
|
&& (!r_bcast || memcmp(buf, sa_bcast, 6))
|
|
&& !eth_match_groupaddr(eth, buf))
|
|
return;
|
|
|
|
/* FIXME: Find another way to pass on the fake csum. */
|
|
etraxfs_dmac_input(eth->dma_in, (void *)buf, size + 4, 1);
|
|
}
|
|
|
|
static int eth_tx_push(void *opaque, unsigned char *buf, int len)
|
|
{
|
|
struct fs_eth *eth = opaque;
|
|
|
|
D(printf("%s buf=%p len=%d\n", __func__, buf, len));
|
|
qemu_send_packet(eth->vc, buf, len);
|
|
return len;
|
|
}
|
|
|
|
static CPUReadMemoryFunc *eth_read[] = {
|
|
ð_rinvalid,
|
|
ð_rinvalid,
|
|
ð_readl,
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *eth_write[] = {
|
|
ð_winvalid,
|
|
ð_winvalid,
|
|
ð_writel,
|
|
};
|
|
|
|
void *etraxfs_eth_init(NICInfo *nd, CPUState *env,
|
|
qemu_irq *irq, target_phys_addr_t base)
|
|
{
|
|
struct etraxfs_dma_client *dma = NULL;
|
|
struct fs_eth *eth = NULL;
|
|
|
|
dma = qemu_mallocz(sizeof *dma * 2);
|
|
if (!dma)
|
|
return NULL;
|
|
|
|
eth = qemu_mallocz(sizeof *eth);
|
|
if (!eth)
|
|
goto err;
|
|
|
|
dma[0].client.push = eth_tx_push;
|
|
dma[0].client.opaque = eth;
|
|
dma[1].client.opaque = eth;
|
|
dma[1].client.pull = NULL;
|
|
|
|
eth->env = env;
|
|
eth->irq = irq;
|
|
eth->dma_out = dma;
|
|
eth->dma_in = dma + 1;
|
|
|
|
/* Connect the phy. */
|
|
eth->phyaddr = 1;
|
|
tdk_init(ð->phy);
|
|
mdio_attach(ð->mdio_bus, ð->phy, eth->phyaddr);
|
|
|
|
eth->ethregs = cpu_register_io_memory(0, eth_read, eth_write, eth);
|
|
cpu_register_physical_memory (base, 0x5c, eth->ethregs);
|
|
|
|
eth->vc = qemu_new_vlan_client(nd->vlan,
|
|
eth_receive, eth_can_receive, eth);
|
|
|
|
return dma;
|
|
err:
|
|
qemu_free(eth);
|
|
qemu_free(dma);
|
|
return NULL;
|
|
}
|