; auto-negotiation is set; switch to register window 4        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+4        out     dx, ax; PHY==24 is the on-chip auto-negotiation logic; it supports only 10base-T and 100base-TX        mov     ah, 24        call    e3c59x_try_phy        test    al, al        jz      .fail_finish        mov     cl, 24        jmp     .check_preamble.mii_device:        cmp     eax, (0110b shl 20)        jne     .fail_finish        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+4        out     dx, ax        lea     edx, [ebp+E3C59X_REG_PHYSICAL_MGMT]        in      ax, dx        and     al, (1 shl E3C59X_BIT_MGMT_DIR) or (1 shl E3C59X_BIT_MGMT_DATA)        cmp     al, (1 shl E3C59X_BIT_MGMT_DATA)        je      .serch_for_phy        xor     al, al        ret.serch_for_phy:; search for PHY        mov     cl, 31.search_phy_loop:        cmp     cl, 24        je      .next_phy        mov     ah, cl ; ah = phy        mov     al, E3C59X_REG_MII_BMCR ; al = Basic Mode Status Register        push    ecx        call    e3c59x_mdio_read        pop     ecx        test    ax, ax        jz      .next_phy        cmp     ax, 0xffff        je      .next_phy        mov     ah, cl ; ah = phy        push    ecx        call    e3c59x_try_phy        pop     ecx        test    al, al        jnz     .check_preamble.next_phy:        dec     cl        jns     .search_phy_loop.fail_finish:        xor     al, al        ret; epilog.check_preamble:        push    eax ; eax contains the return value of e3c59x_try_phy; check hard coded preamble forcing        movzx   eax, byte [e3c59x_ver_id]        test    word [eax*4+e3c59x_hw_versions+2], EXTRA_PREAMBLE        setnz   [e3c59x_preamble] ; force preamble        jnz     .finish; check mii for preamble suppression        mov     ah, cl        mov     al, E3C59X_REG_MII_BMSR        call    e3c59x_mdio_read        test    al, 1000000b ; preamble suppression?        setz    [e3c59x_preamble] ; no.finish:        pop     eax        ret;***************************************************************************;   Function;      e3c59x_test_packet;   Description;      e3c59x_try_loopback try a loopback packet for 10BASE2 or AUI port;   Parameters;      ebp - io_addr;   Return value;      al - 0;      al - 1;   Destroyed registers;      eax, ebx, ecx, edx, edi, esi;;***************************************************************************        align 4e3c59x_test_packet:; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax; set fullDuplexEnable in MacControl register        lea     edx, [ebp+E3C59X_REG_MAC_CONTROL]        in      ax, dx        or      ax, 0x120        out     dx, ax; switch to register window 5        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+5        out     dx, ax; set RxFilter to enable individual address matches        mov     ax, (10000b shl 11)        lea     edx, [ebp+E3C59X_REG_RX_FILTER]        in      al, dx        or      al, 1        lea     edx, [ebp+E3C59X_REG_COMMAND]        out     dx, ax; issue RxEnable and TxEnable        call    e3c59x_rx_reset        call    e3c59x_tx_reset; download a self-directed test packet        mov     edi, node_addr        mov     bx, 0x0608 ; packet type        mov     esi, e3c59x_self_directed_packet        mov     ecx, 6 ; 6 + 6 + 2 + 6 = 20 bytes        call    dword [e3c59x_transmit_function]; wait for 2s        mov     esi, 2000 ; 2000ms = 2s        call    delay_ms; check if self-directed packet is received        call    dword [e3c59x_receive_function]        test    al, al        jnz     .finish; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax; clear fullDuplexEnable in MacControl register        lea     edx, [ebp+E3C59X_REG_MAC_CONTROL]        in      ax, dx        and     ax, not 0x120        out     dx, ax        xor     al, al.finish:        ret;***************************************************************************;   Function;      e3c59x_try_loopback;   Description;      tries a loopback packet for 10BASE2 or AUI port;   Parameters;      al -  0: 10Mbps AUI connector;            1: 10BASE-2;      ebp - io_addr;   Return value;      al - 0;      al - 1;   Destroyed registers;      eax, ebx, ecx, edx, edi, esi;;***************************************************************************        align 4e3c59x_try_loopback:        push    eax; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax        pop     eax        push    eaxif defined E3C59X_DEBUG        mov     bl, al        inc     bl        shl     bl, 3        or      byte [e3c59x_link_type+1], blend if ; defined E3C59X_DEBUG        test    al, al ; aui or coax?        jz      .complete_loopback; enable 100BASE-2 DC-DC converter        mov     ax, (10b shl 11) ; EnableDcConverter        out     dx, ax.complete_loopback:        mov     cl, 2 ; give a port 3 chances to complete a loopback.next_try:        push    ecx        call    e3c59x_test_packet        pop     ecx        test    al, al        jnz     .finish        dec     cl        jns     .next_try.finish:        xchg    eax, [esp]        test    al, al        jz      .aui_finish; issue DisableDcConverter command        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, (10111b shl 11)        out     dx, ax.aui_finish:        pop     eax ; al contains the result of operationif defined E3C59X_DEBUG        test    al, al        jnz     @f        and     byte [e3c59x_link_type+1], not 11000b@@:end if ; defined E3C59X_DEBUG        ret;***************************************************************************;   Function;      e3c59x_set_available_media;   Description;      sets the first available media;   Parameters;      ebp - io_addr;   Return value;      al - 0;      al - 1;   Destroyed registers;      eax, edx;;***************************************************************************        align 4e3c59x_set_available_media:; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax        lea     edx, [ebp+E3C59X_REG_INTERNAL_CONFIG]        in      eax, dx        push    eax        lea     edx, [ebp+E3C59X_REG_MEDIA_OPTIONS]        in      ax, dx        test    al, 10b        jz      @f; baseTXAvailable        pop     eax        and     eax, not (1111b shl 20)        or      eax, (100b shl 20)if defined E3C59X_DEBUG & defined E3C59X_FORCE_FD        mov     word [e3c59x_link_type], (1 shl 8)else if defined E3C59X_DEBUG        mov     word [e3c59x_link_type], (1 shl 7)end if        jmp     .set_media@@:        test    al, 100b        jz      @f; baseFXAvailable        pop     eax        and     eax, not (1111b shl 20)        or      eax, (101b shl 20)if defined E3C59X_DEBUG        mov     word [e3c59x_link_type], (1 shl 10)end if        jmp     .set_media@@:        test    al, 1000000b        jz      @f; miiDevice        pop     eax        and     eax, not (1111b shl 20)        or      eax, (0110b shl 20)if defined E3C59X_DEBUG        mov     word [e3c59x_link_type], (1 shl 13)end if        jmp     .set_media@@:        test    al, 1000b        jz      @f.set_default:; 10bTAvailable        pop     eax        and     eax, not (1111b shl 20)if defined E3C59X_DEBUG & defined E3C59X_FORCE_FD        mov     word [e3c59x_link_type], (1 shl 6)else if defined E3C59X_DEBUG        mov     word [e3c59x_link_type], (1 shl 5)end if ; E3C59X_FORCE_FD        jmp     .set_media@@:        test    al, 10000b        jz      @f; coaxAvailable        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, (10b shl 11) ; EnableDcConverter        out     dx, ax        pop     eax        and     eax, not (1111b shl 20)        or      eax, (11b shl 20)if defined E3C59X_DEBUG        mov     word [e3c59x_link_type], (1 shl 12)end if ; defined E3C59X_DEBUG        jmp     .set_media@@:        test    al, 10000b        jz      .set_default; auiAvailable        pop     eax        and     eax, not (1111b shl 20)        or      eax, (1 shl 20)if defined E3C59X_DEBUG        mov     word [e3c59x_link_type], (1 shl 11)end if ; defined E3C59X_DEBUG.set_media:        lea     edx, [ebp+E3C59X_REG_INTERNAL_CONFIG]        out     dx, eaxif defined E3C59X_FORCE_FD; set fullDuplexEnable in MacControl register        lea     edx, [ebp+E3C59X_REG_MAC_CONTROL]        in      ax, dx        or      ax, 0x120        out     dx, axend if ; E3C59X_FORCE_FD        mov     al, 1        ret;***************************************************************************;   Function;      e3c59x_set_active_port;   Description;      It selects the media port (transceiver) to be used;   Parameters:;      ebp - io_addr;   Return value:;   Destroyed registers;      eax, ebx, ecx, edx, edi, esi;;***************************************************************************        align 4e3c59x_set_active_port:; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax        lea     edx, [ebp+E3C59X_REG_INTERNAL_CONFIG]        in      eax, dx        test    eax, (1 shl 24) ; check if autoselect enable        jz      .set_first_available_media; check 100BASE-TX and 10BASE-T        lea     edx, [ebp+E3C59X_REG_MEDIA_OPTIONS]        in      ax, dx        test    al, 1010b ; check whether 100BASE-TX or 10BASE-T available        jz      .mii_device ; they are not available; set auto-negotiation        lea     edx, [ebp+E3C59X_REG_INTERNAL_CONFIG]        in      eax, dx        and     eax, not (1111b shl 20)        or      eax, (1000b shl 20)        out     dx, eax        call    e3c59x_try_mii        test    al, al        jz      .mii_device        ret.mii_device:; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax; check for off-chip mii device        lea     edx, [ebp+E3C59X_REG_MEDIA_OPTIONS]        in      ax, dx        test    al, 1000000b ; check miiDevice        jz      .base_fx        lea     edx, [ebp+E3C59X_REG_INTERNAL_CONFIG]        in      eax, dx        and     eax, not (1111b shl 20)        or      eax, (0110b shl 20) ; set MIIDevice        out     dx, eax        call    e3c59x_try_mii        test    al, al        jz      .base_fx        ret.base_fx:; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax; check for 100BASE-FX        lea     edx, [ebp+E3C59X_REG_MEDIA_OPTIONS]        in      ax, dx ; read media option register        test    al, 100b ; check 100BASE-FX        jz      .aui_enable        lea     edx, [ebp+E3C59X_REG_INTERNAL_CONFIG]        in      eax, dx        and     eax, not (1111b shl 20)        or      eax, (0101b shl 20) ; set 100base-FX        out     dx, eax        call    e3c59x_try_link_detect        test    al, al        jz      .aui_enable        ret.aui_enable:; switch to register window 3        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+3        out     dx, ax; check for 10Mbps AUI connector        lea     edx, [ebp+E3C59X_REG_MEDIA_OPTIONS]        in      ax, dx ; read media option register