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ETRAX: Add some kind of support for simulating 802.3 auto-negotiation.

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* Add support for link partner ability and diagnostics reg.
* Correct the endianess for MDIO responses.
* Dont trash PHY registers after reads.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4456 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
edgar_igl 2008-05-13 23:51:49 +00:00
parent a37af2891b
commit 2e56350ef1
1 changed files with 55 additions and 17 deletions
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72
hw/etraxfs_eth.c
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@ -30,18 +30,18 @@
#define D(x)
#define R_STAT 0x2c
#define RW_MGM_CTRL 0x28
#define FS_ETH_MAX_REGS 0x5c
/*
* 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);
void (*write)(struct qemu_phy *phy, unsigned int req,
unsigned int data);
};
static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
@ -61,11 +61,35 @@ static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
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] & 0x180);
/* Are we advertising 10 duplex or 100 duplex ? */
duplex = !!(phy->regs[4] & 0x180);
r = (speed_100 << 10) | (duplex << 11);
}
break;
default:
r = phy->regs[regnum];
break;
}
D(printf("%s %x = reg[%d]\n", __func__, r, regnum));
D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
return r;
}
@ -86,6 +110,13 @@ tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
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;
}
@ -230,8 +261,8 @@ static void mdio_cycle(struct qemu_mdio *bus)
case DATA:
if (!bus->mdc) {
if (bus->drive) {
bus->mdio = bus->data & 1;
bus->data >>= 1;
bus->mdio = !!(bus->data & (1 << 15));
bus->data <<= 1;
}
} else {
if (!bus->drive) {
@ -241,7 +272,9 @@ static void mdio_cycle(struct qemu_mdio *bus)
if (bus->cnt == 16 * 2) {
bus->cnt = 0;
bus->state = PREAMBLE;
mdio_write_req(bus);
if (!bus->drive)
mdio_write_req(bus);
bus->drive = 0;
}
}
break;
@ -250,6 +283,11 @@ static void mdio_cycle(struct qemu_mdio *bus)
}
}
/* ETRAX-FS Ethernet MAC block starts here. */
#define R_STAT 0x2c
#define RW_MGM_CTRL 0x28
#define FS_ETH_MAX_REGS 0x5c
struct fs_eth
{
@ -398,15 +436,15 @@ static int eth_tx_push(void *opaque, unsigned char *buf, int len)
}
static CPUReadMemoryFunc *eth_read[] = {
&eth_rinvalid,
&eth_rinvalid,
&eth_readl,
&eth_rinvalid,
&eth_rinvalid,
&eth_readl,
};
static CPUWriteMemoryFunc *eth_write[] = {
&eth_winvalid,
&eth_winvalid,
&eth_writel,
&eth_winvalid,
&eth_winvalid,
&eth_writel,
};
void *etraxfs_eth_init(NICInfo *nd, CPUState *env,