;***************************************************************************;   Function;      e3c59x_rx_reset;   Description;      resets and enables receiver engine;   Parameters:;      ebp - io_addr;   Return value:;   Destroyed registers;      eax, ebx, ecx, edx, edi, esi;;***************************************************************************        align 4e3c59x_rx_reset:        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, (0101b shl 11) or 0x4 ; RxReset        out     dx, ax; wait for RxReset to complete        mov     ecx, 200000.rx_reset_loop:        in      ax, dx        test    ah, 10000b ; check CmdInProgress        jz      .setup_upd        dec     ecx        jns     .rx_reset_loop.setup_upd:; check if full bus mastering        test    byte [e3c59x_full_bus_master], 0xff        jz      .rx_enable; create upd ring        mov     eax, e3c59x_upd_buff        zero_to_virt eax        mov     [e3c59x_curr_upd], eax        mov     esi, eax        virt_to_dma esi        mov     edi, e3c59x_rx_buff        zero_to_dma edi        mov     ebx, e3c59x_upd_buff+(E3C59X_NUM_RX_DESC-1)*E3C59X_UPD_SIZE        zero_to_virt ebx        mov     cl, E3C59X_NUM_RX_DESC-1.upd_loop:        mov     [ebx+E3C59X_UPD_UP_NEXT_PTR], esi        and     dword [eax+E3C59X_UPD_PKT_STATUS], 0        mov     [eax+E3C59X_UPD_UP_FRAG_ADDR], edi        mov     dword [eax+E3C59X_UPD_UP_FRAG_LEN], E3C59X_MAX_ETH_FRAME_SIZE or (1 shl 31)        add     edi, E3C59X_MAX_ETH_FRAME_SIZE        add     esi, E3C59X_UPD_SIZE        mov     ebx, eax        add     eax, E3C59X_UPD_SIZE        dec     cl        jns     .upd_loop        mov     eax, e3c59x_upd_buff        zero_to_dma eax        lea     edx, [ebp+E3C59X_REG_UP_LIST_PTR]        out     dx, eax ; write E3C59X_REG_UP_LIST_PTR        lea     edx, [ebp+E3C59X_REG_COMMAND].rx_enable:        mov     ax, (00100b shl 11) ; RxEnable        out     dx, ax        ret;***************************************************************************;   Function;      e3c59x_write_eeprom;   Description;      reads eeprom;      Note : the caller must switch to the register window 0;             before calling this function;   Parameters:;      ax - register to be read (only the first 63 words can be read);      cx - value to be read into the register;   Return value:;      ax - word read;   Destroyed registers;      ax, ebx, edx;;***************************************************************************;       align 4;e3c59x_write_eeprom:;       mov     edx, [io_addr];       add     edx, E3C59X_REG_EEPROM_COMMAND;       cmp     ah, 11b;       ja      .finish ; address may have a value of maximal 1023;       shl     ax, 2;       shr     al, 2;       push    eax;; wait for busy;       mov     ebx, 0xffff;@@:;       in      ax, dx;       test    ah, 0x80;       jz      .write_enable;       dec     ebx;       jns     @r;; write enable;.write_enable:;       xor     eax, eax;       mov     eax, (11b shl 4);       out     dx, ax;; wait for busy;       mov     ebx, 0xffff;@@:;       in      ax, dx;       test    ah, 0x80;       jz      .erase_loop;       dec     ebx;       jns     @r;.erase_loop:;       pop     eax;       push    eax;       or      ax, (11b shl 6) ; erase register;       out     dx, ax;       mov     ebx, 0xffff;@@:;       in      ax, dx;       test    ah, 0x80;       jz      .write_reg;       dec     ebx;       jns     @r;.write_reg:;       add     edx, E3C59X_REG_EEPROM_DATA-E3C59X_REG_EEPROM_COMMAND;       mov     eax, ecx;       out     dx, ax;; write enable;       add     edx, E3C59X_REG_EEPROM_COMMAND-E3C59X_REG_EEPROM_DATA;       xor     eax, eax;       mov     eax, (11b shl 4);       out     dx, ax; wait for busy;       mov     ebx, 0xffff;@@:;       in      ax, dx;       test    ah, 0x80;       jz      .issue_write_reg;       dec     ebx;       jns     @r;.issue_write_reg:;       pop     eax;       or      ax, 01b shl 6;       out     dx, ax;.finish:;       ret;***************************************************************************;   Function;      e3c59x_read_eeprom;   Description;      reads eeprom;   Parameters:;       ax - register to be read (only the first 63 words can be read);      ebp - io_addr;   Return value:;      ax - word read;   Destroyed registers;      ax, ebx, edx, ebp;;***************************************************************************        align 4e3c59x_read_eeprom:        push    eax; switch to register window 0        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+0        out     dx, ax        pop     eax        and     ax, 111111b ; take only the first 6 bits into account        movzx   ebx, byte [e3c59x_ver_id]        test    word [ebx*4+e3c59x_hw_versions+2], EEPROM_8BIT        jz      @f        add     ax, 0x230 ; hardware constant        jmp     .read@@:        add     ax, E3C59X_EEPROM_CMD_READ        test    word [ebx*4+e3c59x_hw_versions+2], EEPROM_OFFSET        jz      .read        add     ax, 0x30.read:        lea     edx, [ebp+E3C59X_REG_EEPROM_COMMAND]        out     dx, ax        mov     ebx, 0xffff ; duration of about 162 us ;-).wait_for_reading:        in      ax, dx        test    ah, 0x80 ; check bit eepromBusy        jz      .read_data        dec     ebx        jns     .wait_for_reading.read_data:        lea     edx, [ebp+E3C59X_REG_EEPROM_DATA]        in      ax, dx        ret;***************************************************************************;   Function;      e3c59x_mdio_sync;   Description;      initial synchronization;   Parameters;      ebp - io_addr;   Return value;   Destroyed registers;      ax, edx, cl;;***************************************************************************        align 4e3c59x_mdio_sync:; switch to register window 4        lea     edx, [ebp+E3C59X_REG_COMMAND]        mov     ax, E3C59X_SELECT_REGISTER_WINDOW+4        out     dx, ax        cmp     byte [e3c59x_preamble], 0        je      .no_preamble; send 32 logic ones        lea     edx, [ebp+E3C59X_REG_PHYSICAL_MGMT]        mov     cl, 31.loop:        mov     ax, (1 shl E3C59X_BIT_MGMT_DATA) or (1 shl E3C59X_BIT_MGMT_DIR)        out     dx, ax        in      ax, dx ; delay        mov     ax, (1 shl E3C59X_BIT_MGMT_DATA) \                    or (1 shl E3C59X_BIT_MGMT_DIR) \                    or (1 shl E3C59X_BIT_MGMT_CLK)        out     dx, ax        in      ax, dx ; delay        dec     cl        jns     .loop.no_preamble:        ret;***************************************************************************;   Function;      e3c59x_mdio_read;   Description;      read MII register;      see page 16 in D83840A.pdf;   Parameters;       ah - PHY addr;       al - register addr;      ebp - io_addr;   Return value;      ax - register read;   Destroyed registers;      eax, ebx, cx, edx;;***************************************************************************        align 4e3c59x_mdio_read:        push    eax        call    e3c59x_mdio_sync ; returns with window #4        pop     eax        lea     edx, [ebp+E3C59X_REG_PHYSICAL_MGMT]        shl     al, 3        shr     ax, 3        and     ax, not E3C59X_MII_CMD_MASK        or      ax, E3C59X_MII_CMD_READ        mov     ebx, eax        xor     ecx, ecx        mov     cl, 13.cmd_loop:        mov     ax, (1 shl E3C59X_BIT_MGMT_DIR) ; write mii        bt      ebx, ecx        jnc     .zero_bit        or      al, (1 shl E3C59X_BIT_MGMT_DATA).zero_bit:        out     dx, ax        push    eax        in      ax, dx ; delay        pop     eax        or      al, (1 shl E3C59X_BIT_MGMT_CLK) ; write        out     dx, ax        in      ax, dx ; delay        dec     cl        jns     .cmd_loop; read data (18 bits with the two transition bits)        mov     cl, 17        xor     ebx, ebx.read_loop:        shl     ebx, 1        xor     eax, eax ; read comand        out     dx, ax        in      ax, dx ; delay        in      ax, dx        test    al, (1 shl E3C59X_BIT_MGMT_DATA)        jz      .dont_set        inc     ebx.dont_set:        mov     ax, (1 shl E3C59X_BIT_MGMT_CLK)        out     dx, ax        in      ax, dx ; delay        dec     cl        jns     .read_loop        mov     eax, ebx        ret;***************************************************************************;   Function;      e3c59x_mdio_write;   Description;      write MII register;      see page 16 in D83840A.pdf;   Parameters;       ah - PHY addr;       al - register addr;       bx - word to be written;      ebp - io_addr;   Return value;      ax - register read;   Destroyed registers;      eax, ebx, cx, edx;;***************************************************************************        align 4e3c59x_mdio_write:        push    eax        call    e3c59x_mdio_sync        pop     eax        lea     edx, [ebp+E3C59X_REG_PHYSICAL_MGMT]        shl     al, 3        shr     ax, 3        and     ax, not E3C59X_MII_CMD_MASK        or      ax, E3C59X_MII_CMD_WRITE        shl     eax, 2        or      eax, 10b ; transition bits        shl     eax, 16        mov     ax, bx        mov     ebx, eax        mov     ecx, 31.cmd_loop:        mov     ax, (1 shl E3C59X_BIT_MGMT_DIR) ; write mii        bt      ebx, ecx        jnc     .zero_bit        or      al, (1 shl E3C59X_BIT_MGMT_DATA).zero_bit:        out     dx, ax        push    eax        in      ax, dx ; delay        pop     eax        or      al, (1 shl E3C59X_BIT_MGMT_CLK) ; write        out     dx, ax        in      ax, dx ; delay        dec     ecx        jns     .cmd_loop        ret;***************************************************************************;   Function;      e3c59x_transmit;   Description;      Transmits a packet of data via the ethernet card;         edi - Pointer to 48 bit destination address;          bx - Type of packet;         ecx - size of packet;         esi - pointer to packet data;         ebp - io_addr;   Destroyed registers;      eax, ecx, edx, ebp;;***************************************************************************        align 4e3c59x_transmit:        jmp     dword [e3c59x_transmit_function];***************************************************************************;   Function;      e3c59x_check_tx_status;   Description;      Checks TxStatus queue.;   Return value;      al - 0 no error was found;      al - 1 error was found TxReset is needed;   Destroyed registers;      eax, ecx, edx, ebp;;***************************************************************************e3c59x_check_tx_status:        movzx   ebp, word [io_addr] ; to be implemented in ETHERNET.INC; clear TxStatus queue        lea     edx, [ebp+E3C59X_REG_TX_STATUS]        mov     cl, 31 ; max number of queue entries.tx_status_loop:        in      al, dx        test    al, al        jz      .finish ; no error        test    al, 0x3f        jnz     .finish ; error.no_error_found:; clear current TxStatus entry which advances the next one        xor     al, al        out