mirror of
https://github.com/bobbimanners/emailler.git
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8279ef4d63
Up to now every IP65 library contained exactly one Ethernet driver. In scenarios without strict memory limitations I might however be benefitial to have an IP65 library containing all Ethernet drivers available for a given target. The Ethernet hardware detection that was already present before is used in this scenario to try to initialize one Ethernet driver after the other until one succeeds. If all drivers fail to initialize the user gets informed as usual. The WIZ811MJ driver was primarily introduced for orthogonality reasons. There are however at least two W5100-based prototypes for the C64 so it makes at least some sense. The name was chosen as sort of placeholder for "something containing a W5100 chip".
234 lines
4.8 KiB
ArmAsm
234 lines
4.8 KiB
ArmAsm
; Wrapper for combination of Contiki ethernet drivers
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.include "zeropage.inc"
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.include "../inc/common.i"
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.export eth_init
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.export eth_rx
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.export eth_tx
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.export eth_driver_name
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.export eth_driver_io_base
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.import eth_inp
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.import eth_inp_len
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.import eth_outp
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.import eth_outp_len
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.import _cs8900a
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.import _cs8900a_driver_name
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.import _cs8900a_driver_io_base
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.import _lan91c96
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.import _lan91c96_driver_name
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.import _lan91c96_driver_io_base
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.import _w5100
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.import _w5100_driver_name
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.import _w5100_driver_io_base
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.import cfg_mac
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.struct driver
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drvtype .byte 3
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apiver .byte
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mac .byte 6
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bufaddr .addr
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bufsize .word
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init .byte 3
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poll .byte 3
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send .byte 3
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exit .byte 3
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.endstruct
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eth = ptr1
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.bss
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eth_driver_name: .res 20
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eth_driver_io_base: .res 2
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.code
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; computes pointer to ethernet driver struct member
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; inputs:
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; eth: pointer to Contiki ethernet driver
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; A: offset of driver struct member
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; outputs:
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; AX: pointer to ethernet driver struct member
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add_driver_offset:
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clc
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adc eth
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ldx eth+1
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bcc :+
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inx
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: rts
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; increment AX by one
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; inputs:
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; AX: value to increment
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; outputs:
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; AX: incremented value
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incr_ax:
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clc
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adc #1
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bcc :+
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inx
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: rts
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; patches Contiki ethernet driver into wrapper code
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; inputs:
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; AX: pointer to Contiki ethernet driver
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; outputs:
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; none
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patch_wrapper:
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stax eth
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lda #driver::mac
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jsr add_driver_offset
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stax patch_mac+1
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lda #driver::bufaddr
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jsr add_driver_offset
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stax patch_bufaddr_rx+1
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stax patch_bufaddr_tx+1
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jsr incr_ax
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stax patch_bufaddr_rx+4
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stax patch_bufaddr_tx+4
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lda #driver::bufsize
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jsr add_driver_offset
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stax patch_bufsize+1
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jsr incr_ax
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stax patch_bufsize+4
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lda #driver::init
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jsr add_driver_offset
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stax patch_init+1
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lda #driver::poll
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jsr add_driver_offset
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stax patch_poll+1
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lda #driver::send
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jsr add_driver_offset
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stax patch_send+1
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rts
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; set ethernet driver name
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; inputs:
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; AX: pointer to name
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; outputs:
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; none
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set_name:
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stax ptr1
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ldy #18 ; sizeof(eth_driver_name)-2
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: lda (ptr1),y
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sta eth_driver_name,y
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dey
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bpl :-
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rts
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; initialize one of the known ethernet adaptors
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; inputs: none
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; outputs: carry flag is set if there was an error, clear otherwise
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eth_init:
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ldax #_cs8900a
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jsr patch_wrapper
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ldax #_cs8900a_driver_name
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jsr set_name
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ldax _cs8900a_driver_io_base
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jsr init_adaptor
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bcc @done
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ldax #_lan91c96
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jsr patch_wrapper
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ldax #_lan91c96_driver_name
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jsr set_name
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ldax _lan91c96_driver_io_base
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jsr init_adaptor
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bcc @done
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ldax #_w5100
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jsr patch_wrapper
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ldax #_w5100_driver_name
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jsr set_name
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ldax _w5100_driver_io_base
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jsr init_adaptor
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@done:
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rts
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.data
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; initialize the ethernet adaptor
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; inputs: ethernet adaptor i/o base addr
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; outputs: carry flag is set if there was an error, clear otherwise
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init_adaptor:
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stax eth_driver_io_base
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patch_init:
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jsr $ffff ; temporary vector - gets filled in later
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ldx #5
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patch_mac:
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: lda $ffff,x ; temporary addr - gets filled in later
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sta cfg_mac,x
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dex
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bpl :-
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ldax #1518
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patch_bufsize:
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stax $fffe ; temporary addr - gets filled in later
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rts
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; receive a packet
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; inputs: none
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; outputs:
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; if there was an error receiving the packet (or no packet was ready) then carry flag is set
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; if packet was received correctly then carry flag is clear,
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; eth_inp contains the received packet,
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; and eth_inp_len contains the length of the packet
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eth_rx:
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ldax #eth_inp
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patch_bufaddr_rx:
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stax $fffe ; temporary addr - gets filled in later
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patch_poll:
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jsr $ffff ; temporary vector - gets filled in later
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stax eth_inp_len
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rts
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; send a packet
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; inputs:
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; eth_outp: packet to send
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; eth_outp_len: length of packet to send
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; outputs:
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; if there was an error sending the packet then carry flag is set
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; otherwise carry flag is cleared
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eth_tx:
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ldax #eth_outp
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patch_bufaddr_tx:
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stax $fffe ; temporary addr - gets filled in later
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ldax eth_outp_len
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patch_send:
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jmp $ffff ; temporary vector - gets filled in later
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; -- LICENSE FOR ethernetcombo.s --
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; The contents of this file are subject to the Mozilla Public License
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; Version 1.1 (the "License"); you may not use this file except in
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; compliance with the License. You may obtain a copy of the License at
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; http://www.mozilla.org/MPL/
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;
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; Software distributed under the License is distributed on an "AS IS"
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; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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; License for the specific language governing rights and limitations
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; under the License.
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;
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; The Original Code is ip65.
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;
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; The Initial Developer of the Original Code is Jonno Downes,
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; jonno@jamtronix.com.
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; Portions created by the Initial Developer are Copyright (C) 2009
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; Jonno Downes. All Rights Reserved.
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; -- LICENSE END --
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