mirror of https://github.com/xqemu/xqemu.git
ETRAX: Add some kind of support for simulating 802.3 auto-negotiation.
* 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
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@ -30,18 +30,18 @@
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#define D(x)
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#define D(x)
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#define R_STAT 0x2c
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/*
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#define RW_MGM_CTRL 0x28
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* The MDIO extensions in the TDK PHY model were reversed engineered from the
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#define FS_ETH_MAX_REGS 0x5c
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* linux driver (PHYID and Diagnostics reg).
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* TODO: Add friendly names for the register nums.
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*/
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struct qemu_phy
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struct qemu_phy
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{
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{
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uint32_t regs[32];
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uint32_t regs[32];
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unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
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unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
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void (*write)(struct qemu_phy *phy, unsigned int req, unsigned int data);
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void (*write)(struct qemu_phy *phy, unsigned int req,
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unsigned int data);
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};
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};
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static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
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static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
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@ -61,11 +61,35 @@ static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
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r |= (1 << 3); /* Autoneg able. */
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r |= (1 << 3); /* Autoneg able. */
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r |= (1 << 2); /* Link. */
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r |= (1 << 2); /* Link. */
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break;
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break;
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case 5:
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/* Link partner ability.
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We are kind; always agree with whatever best mode
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the guest advertises. */
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r = 1 << 14; /* Success. */
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/* Copy advertised modes. */
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r |= phy->regs[4] & (15 << 5);
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/* Autoneg support. */
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r |= 1;
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break;
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case 18:
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{
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/* Diagnostics reg. */
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int duplex = 0;
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int speed_100 = 0;
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/* Are we advertising 100 half or 100 duplex ? */
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speed_100 = !!(phy->regs[4] & 0x180);
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/* Are we advertising 10 duplex or 100 duplex ? */
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duplex = !!(phy->regs[4] & 0x180);
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r = (speed_100 << 10) | (duplex << 11);
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}
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break;
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default:
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default:
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r = phy->regs[regnum];
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r = phy->regs[regnum];
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break;
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break;
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}
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}
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D(printf("%s %x = reg[%d]\n", __func__, r, regnum));
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D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
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return r;
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return r;
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}
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}
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@ -86,6 +110,13 @@ tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
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static void
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static void
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tdk_init(struct qemu_phy *phy)
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tdk_init(struct qemu_phy *phy)
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{
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{
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phy->regs[0] = 0x3100;
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/* PHY Id. */
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phy->regs[2] = 0x0300;
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phy->regs[3] = 0xe400;
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/* Autonegotiation advertisement reg. */
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phy->regs[4] = 0x01E1;
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phy->read = tdk_read;
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phy->read = tdk_read;
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phy->write = tdk_write;
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phy->write = tdk_write;
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}
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}
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@ -230,8 +261,8 @@ static void mdio_cycle(struct qemu_mdio *bus)
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case DATA:
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case DATA:
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if (!bus->mdc) {
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if (!bus->mdc) {
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if (bus->drive) {
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if (bus->drive) {
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bus->mdio = bus->data & 1;
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bus->mdio = !!(bus->data & (1 << 15));
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bus->data >>= 1;
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bus->data <<= 1;
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}
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}
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} else {
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} else {
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if (!bus->drive) {
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if (!bus->drive) {
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@ -241,7 +272,9 @@ static void mdio_cycle(struct qemu_mdio *bus)
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if (bus->cnt == 16 * 2) {
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if (bus->cnt == 16 * 2) {
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bus->cnt = 0;
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bus->cnt = 0;
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bus->state = PREAMBLE;
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bus->state = PREAMBLE;
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mdio_write_req(bus);
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if (!bus->drive)
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mdio_write_req(bus);
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bus->drive = 0;
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}
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}
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}
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}
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break;
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break;
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@ -250,6 +283,11 @@ static void mdio_cycle(struct qemu_mdio *bus)
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}
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}
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}
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}
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/* ETRAX-FS Ethernet MAC block starts here. */
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#define R_STAT 0x2c
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#define RW_MGM_CTRL 0x28
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#define FS_ETH_MAX_REGS 0x5c
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struct fs_eth
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struct fs_eth
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{
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{
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@ -398,15 +436,15 @@ static int eth_tx_push(void *opaque, unsigned char *buf, int len)
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}
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}
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static CPUReadMemoryFunc *eth_read[] = {
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static CPUReadMemoryFunc *eth_read[] = {
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ð_rinvalid,
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ð_rinvalid,
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ð_rinvalid,
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ð_rinvalid,
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ð_readl,
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ð_readl,
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};
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};
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static CPUWriteMemoryFunc *eth_write[] = {
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static CPUWriteMemoryFunc *eth_write[] = {
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ð_winvalid,
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ð_winvalid,
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ð_winvalid,
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ð_winvalid,
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ð_writel,
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ð_writel,
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};
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};
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void *etraxfs_eth_init(NICInfo *nd, CPUState *env,
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void *etraxfs_eth_init(NICInfo *nd, CPUState *env,
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