22,6 → 22,13 |
DRV_ENTRY equ 1 |
DRV_EXIT equ -1 |
|
THR_REG equ 0; x3f8 ;transtitter/reciever |
IER_REG equ 1; x3f9 ;interrupt enable |
IIR_REG equ 2; x3fA ;interrupt info |
LCR_REG equ 3; x3FB ;line control |
MCR_REG equ 4; x3FC ;modem control |
LSR_REG equ 5; x3FD ;line status |
MSR_REG equ 6; x3FE ;modem status |
|
LCR_5BIT equ 0x00 |
LCR_6BIT equ 0x01 |
63,7 → 70,7 |
MCR_DTR equ 0x01 ;0-> DTR=1, 1-> DTR=0 |
MCR_RTS equ 0x02 ;0-> RTS=1, 1-> RTS=0 |
MCR_OUT_1 equ 0x04 ;0-> OUT1=1, 1-> OUT1=0 |
MCR_OUT_2 equ 0x08 ;0-> OUT2=1, 1-> OUT2=0 |
MCR_OUT_2 equ 0x08 ;0-> OUT2=1, 1-> OUT2=0 enable intr |
MCR_LOOP equ 0x10 ;lopback mode |
|
MSR_DCTS equ 0x01 ;delta clear to send |
71,13 → 78,6 |
MSR_TERI equ 0x04 ;trailinh edge of ring |
MSR_DDCD equ 0x08 ;delta carrier detect |
|
COM_THR equ 0x3f8 ;transtitter/reciever |
COM_IER equ 0x3f9 ;interrupt enable |
COM_IIR equ 0x3fA ;interrupt info |
COM_LCR equ 0x3FB ;line control |
COM_MCR equ 0x3FC ;modem control |
COM_LSR equ 0x3FD ;line status |
COM_MSR equ 0x3FE ;modem status |
|
RATE_50 equ 0 |
RATE_75 equ 1 |
99,18 → 99,25 |
RATE_57600 equ 17 |
RATE_115200 equ 18 |
|
COM_1 equ 0 |
COM_2 equ 1 |
COM_3 equ 2 |
COM_4 equ 3 |
COM_1 equ 1 |
COM_2 equ 2 |
COM_3 equ 3 |
COM_4 equ 4 |
COM_MAX equ 2 ;only two port supported |
|
COM_1_BASE equ 0x3F8 |
COM_2_BASE equ 0x2F8 |
|
COM_1_IRQ equ 4 |
COM_2_IRQ equ 3 |
TRANSMIT equ 1 |
|
UART_CLOSED equ 0 |
UART_TRANSMIT equ 1 |
|
struc COMPORT |
struc UART |
{ |
; .owner dd ? unused |
.lock dd ? |
.base dd ? |
.lcr_reg dd ? |
.mcr_reg dd ? |
117,30 → 124,47 |
.rate dd ? |
.mode dd ? |
.state dd ? |
.connection dd ? |
|
.rcvr_rp dd ? |
.rcvr_wp dd ? |
.rcvr_free dd ? |
.rcvr_count dd ? |
|
.xmit_rp dd ? |
.xmit_wp dd ? |
.xmit_free dd ? |
.xmit_count dd ? |
.rcvr_buffer rb 128 |
.xmit_buffer rb 128 |
.rcvr_buffer rb 128 |
} |
virtual at 0 |
COMPORT COMPORT |
UART UART |
end virtual |
|
COMPORT_SIZE equ 256+15*4 |
RCVR_OFFSET equ 14*4 |
XMIT_OFFSET equ (13*4*128) |
UART_SIZE equ (256+13*4) |
|
UART_VERSION equ 0x00000000 |
struc CONNECTION |
{ |
.magic dd ? ;'CNCT' |
.destroy dd ? ;internal destructor |
.fd dd ? ;next object in list |
.bk dd ? ;prev object in list |
.pid dd ? ;owner id |
|
init_com: |
mov eax, COMPORT_SIZE |
.id dd ? ;reserved |
.uart dd ? ;uart pointer |
} |
|
virtual at 0 |
CONNECTION CONNECTION |
end virtual |
|
CONNECTION_SIZE equ 7*4 |
|
UART_VERSION equ 0x12345678 ;debug |
|
init_uart_service: |
mov eax, UART_SIZE |
call malloc |
test eax, eax |
jz .fail |
147,14 → 171,17 |
|
mov [com1], eax |
mov edi, eax |
mov ecx, COMPORT_SIZE/4 |
mov ecx, UART_SIZE/4 |
xor eax, eax |
cld |
rep stosd |
|
call reset |
mov eax, [com1] |
mov [eax+UART.base], COM_1_BASE |
|
stdcall attach_int_handler, COM_1_IRQ, com_isr |
call uart_reset ;eax= uart |
|
stdcall attach_int_handler, COM_1_IRQ, com_1_isr |
stdcall reg_service, sz_uart_srv, uart_proc |
ret |
.fail: |
191,7 → 218,6 |
jne @F |
|
mov eax, [ebx+output] |
mov eax, [eax] |
mov [eax], dword UART_VERSION |
xor eax, eax |
ret |
198,23 → 224,18 |
@@: |
cmp eax, PORT_OPEN |
jne @F |
call open_port |
ret |
|
|
mov esi, [ebx+input] |
mov ecx, [esi] |
mov edx, [com1] |
cmp [edx+COMPORT.connection], ecx |
je @F |
mov edx, [com2] |
cmp [edx+COMPORT.connection], ecx |
jne .fail |
|
mov edi, [ebx+output] |
call [uart_func+eax*4] ;edx, esi, edi |
mov ebx, [ebx+input] |
mov eax, [ebx] |
call uart_open |
mov ebx, [ioctl] |
mov ebx, [ebx+output] |
mov [ebx], ecx |
ret |
|
@@: |
mov esi, [ebx+input] ;input buffer |
call [uart_func+eax*4] |
ret |
.fail: |
or eax, -1 |
ret |
229,57 → 250,50 |
restore out_size |
|
|
open_port: |
ret |
|
; set mode 2400 bod 8-bit |
; disable DTR & RTS |
; clear FIFO |
; clear pending interrupts |
; |
; param |
; edx= port |
; esi= input data |
; edi= output data |
; |
; retval |
; eax=0 success |
; eax <>0 error |
; eax= uart |
|
align 4 |
close_port: |
|
call reset |
mov [edx+COMPORT.connection], 0 |
uart_reset: |
mov esi, eax |
mov [eax+UART.state], UART_CLOSED |
mov edx, [eax+UART.base] |
add edx, MCR_REG |
xor eax, eax |
ret |
out dx, al ;clear DTR & RTS |
|
mov eax, esi |
mov ebx, RATE_2400 |
mov ecx, LCR_8BIT+LCR_STOP_1 |
call uart_set_mode.internal |
|
; set mode 2400 bod 8-bit |
; clear FIFO |
; clear pending interrupts |
|
align 4 |
reset: |
mov eax, RATE_2400 |
mov ebx, LCR_8BIT+LCR_STOP_1 |
call set_mode |
|
mov edx, [esi+UART.base] |
add edx, IIR_REG |
mov eax,FCR_EFIFO+FCR_CRB+FCR_CXMIT+FCR_FIFO_14 |
mov edx, COM_IIR |
out dx, al |
|
.clear_RB: |
mov edx, COM_LSR |
mov edx, [esi+UART.base] |
add edx, LSR_REG |
in al, dx |
test eax, LSR_DR |
jz @F |
|
mov edx, COM_THR |
mov edx, [esi+UART.base] |
in al, dx |
jmp .clear_RB |
@@: |
mov edx, [esi+UART.base] |
add edx, IER_REG |
mov eax,IER_RDAI+IER_THRI+IER_LSI |
mov edx, COM_IER |
out dx, al |
|
.clear_IIR: |
mov edx, COM_IIR |
mov edx, [esi+UART.base] |
add edx, IIR_REG |
in al, dx |
test al, IIR_INTR |
jnz .done |
288,7 → 302,8 |
and eax, 3 |
jnz @F |
|
mov edx, COM_MSR |
mov edx, [esi+UART.base] |
add edx, MSR_REG |
in al, dx |
jmp .clear_IIR |
@@: |
298,191 → 313,335 |
cmp eax, 2 |
jne @F |
|
mov edx, COM_THR |
mov edx, [esi+UART.base] |
in al, dx |
jmp .clear_IIR |
@@: |
mov edx, COM_LSR |
mov edx, [esi+UART.base] |
add edx, LSR_REG |
in al, dx |
jmp .clear_IIR |
|
.done: |
mov edi, rcvr_buff |
lea edi, [esi+UART.rcvr_buffer] |
mov ecx, 256/4 |
xor eax, eax |
mov ecx, 256/4 |
|
mov [rcvr_rp], edi |
mov [rcvr_wp], edi |
mov [rcvr_free], 128 |
;; mov [rcvr_count], 16 |
mov [esi+UART.rcvr_rp], eax |
mov [esi+UART.rcvr_wp], eax |
mov [esi+UART.rcvr_free], 128 |
mov [esi+UART.xmit_rp], eax |
mov [esi+UART.xmit_wp], eax |
mov [esi+UART.xmit_free], 128 |
|
mov [xmit_rp], xmit_buff |
mov [xmit_wp], xmit_buff |
mov [xmit_free], 128 |
mov [xmit_count], 16 ;FIFO free |
|
cld |
rep stosd |
ret |
|
|
; param |
; eax= rate constant |
; ebx= mode bits |
; esi= input buffer |
; +0 connection |
; +4 rate |
; +8 mode |
; |
; retval |
; eax= error code |
|
align 4 |
set_mode: |
cmp eax, RATE_115200 |
uart_set_mode: |
mov eax, [esi] |
cmp [eax+APPOBJ.magic], 'CNCT' |
jne .fail |
|
cmp [eax+APPOBJ.destroy], uart_close.destroy |
jne .fail |
|
mov eax, [eax+CONNECTION.uart] |
test eax, eax |
jz .fail |
|
mov ebx, [esi+4] |
mov ecx, [esi+8] |
|
; param |
; eax= uart |
; ebx= baud rate |
; ecx= mode |
|
align 4 |
.internal: |
cmp ebx, RATE_115200 |
ja .fail |
|
cmp ebx, LCR_BREAK |
cmp ecx, LCR_BREAK |
jae .fail |
|
mov [rate], eax |
mov [mode], ebx |
mov [eax+UART.rate], ebx |
mov [eax+UART.mode], ecx |
|
mov cx, [divisor+eax*2] |
mov esi, eax |
mov bx, [divisor+ebx*2] |
|
mov dx, COM_LCR |
mov edx, [esi+UART.base] |
push edx |
add edx, LCR_REG |
in al, dx |
or al, 0x80 |
out dx, al |
|
mov dx, COM_THR |
mov al, cl |
pop edx |
mov al, bl |
out dx, al |
|
inc dx |
mov al, ch |
mov al, bh |
out dx, al |
|
mov dx, COM_LCR |
mov eax, ebx |
add edx, LCR_REG-1 |
mov eax, ecx |
out dx, al |
xor eax, eax |
ret |
.fail: |
or eax, -1 |
ret |
|
|
align 4 |
uart_set_modem: |
|
mov [eax+UART.mcr_reg], ebx |
mov edx, [eax+UART.base] |
add edx, MCR_REG |
mov al, bl |
out dx, al |
ret |
|
; param |
; eax= rate constant |
; eax= port |
; |
; retval |
; ecx= connection |
; eax= error code |
|
align 4 |
uart_open: |
dec eax |
cmp eax, COM_MAX |
jae .fail |
|
mov esi, [com1+eax*4] ;uart |
push esi |
.do_wait: |
cmp dword [esi+UART.lock],0 |
je .get_lock |
call change_task |
jmp .do_wait |
.get_lock: |
mov eax, 1 |
xchg eax, [esi+UART.lock] |
test eax, eax |
jnz .do_wait |
|
mov eax, esi ;uart |
call uart_reset |
|
mov ebx, [CURRENT_TASK] |
shl ebx, 5 |
mov ebx, [CURRENT_TASK+ebx+4] |
mov eax, CONNECTION_SIZE |
call create_kernel_object |
pop esi ;uart |
test eax, eax |
jz .fail |
|
mov [eax+APPOBJ.magic], 'CNCT' |
mov [eax+APPOBJ.destroy], uart_close.destroy |
mov [eax+CONNECTION.uart], esi |
mov ecx, eax |
xor eax, eax |
ret |
.fail: |
or eax, -1 |
ret |
restore .uart |
|
; param |
; esi= input buffer |
|
align 4 |
uart_close: |
mov eax, [esi] |
cmp [eax+APPOBJ.magic], 'CNCT' |
jne .fail |
|
cmp [eax+APPOBJ.destroy], uart_close.destroy |
jne .fail |
.destroy: |
push [eax+CONNECTION.uart] |
call destroy_kernel_object ;eax= object |
pop eax ;eax= uart |
test eax, eax |
jz .fail |
|
mov [eax+UART.state], UART_CLOSED |
mov [eax+UART.lock], 0 ;release port |
xor eax, eax |
ret |
.fail: |
or eax, -1 |
ret |
|
|
; param |
; eax= uart |
; ebx= baud rate |
|
align 4 |
set_rate: |
cmp eax, RATE_115200 |
cmp ebx, RATE_115200 |
ja .fail |
|
mov [rate], eax |
mov bx, [divisor+eax*2] |
mov [eax+UART.rate], ebx |
mov bx, [divisor+ebx*2] |
|
mov dx, COM_LCR |
mov edx, [eax+UART.base] |
add edx, LCR_REG |
in al, dx |
push eax |
or al, 0x80 |
out dx, al |
|
mov dx, COM_THR |
sub edx, LCR_REG |
mov al, bl |
out dx, al |
|
inc dx |
inc edx |
mov al, bh |
out dx, al |
|
mov dx, COM_LCR |
mov eax, [lcr_reg] |
pop eax |
add edx, LCR_REG-1 |
out dx, al |
.fail: |
ret |
|
|
; param |
; ebx= uart |
|
align 4 |
transmit: |
push esi |
mov edx, COM_THR |
push edi |
push ebp |
|
mov [xmit_count], 16 |
mov edx, [ebx+UART.base] |
|
pushfd |
cli |
|
mov esi, [xmit_rp] |
mov ecx, [xmit_free] |
mov ebp, 16 |
mov esi, [ebx+UART.xmit_rp] |
lea edi, [ebx+UART.xmit_buffer] |
mov ecx, [ebx+UART.xmit_free] |
|
cmp ecx, 128 |
je .exit |
@@: |
and esi, 127 |
mov al, [xmit_buff+esi] |
mov al, [esi+edi] |
inc esi |
|
out dx, al |
inc ecx |
dec [xmit_count] |
dec ebp |
jz .done |
|
cmp ecx, 128 |
jne @B |
.done: |
add esi, xmit_buff |
mov [xmit_rp], esi |
mov [xmit_free], ecx |
mov [com_state], TRANSMIT |
mov [ebx+UART.xmit_rp], esi |
mov [ebx+UART.xmit_free], ecx |
mov [ebx+UART.state], UART_TRANSMIT |
.exit: |
popfd |
pop ebp |
pop edi |
pop esi |
ret |
|
; param |
; eax= uart |
; ebx= src |
; edx= count |
|
; eax= src |
; ebx= count |
|
align 4 |
comm_send: |
mov edi, [xmit_wp] |
mov esi, eax |
uart_write: |
mov esi, ebx |
mov edi, [eax+UART.xmit_wp] |
lea ebx, [eax+UART.xmit_buffer] |
.write: |
test ebx, ebx |
test edx, edx |
jz .done |
.wait: |
cmp [xmit_free], 0 |
cmp [eax+UART.xmit_free], 0 |
jne .fill |
|
cmp [com_state], TRANSMIT |
cmp [eax+UART.state], UART_TRANSMIT |
je .wait |
|
mov ebx, eax |
push edx |
call transmit |
pop edx |
mov eax, ebx |
lea ebx, [ebx+UART.xmit_buffer] |
jmp .write |
.fill: |
mov ecx, xmit_buff+128 |
mov ecx, 128 |
sub ecx, edi |
cmp ecx, [xmit_free] |
jb @F |
jz .clip |
cmp ecx, [eax+UART.xmit_free] |
jbe @F |
|
mov ecx, [xmit_free] |
mov ecx, [eax+UART.xmit_free] |
@@: |
cmp ecx, ebx |
jb @F |
mov ecx, ebx |
cmp ecx, edx |
jbe @F |
mov ecx, edx |
@@: |
sub [xmit_free], ecx |
sub ebx, ecx |
sub [eax+UART.xmit_free], ecx |
sub edx, ecx |
|
add edi, ebx |
cld |
rep movsb |
|
cmp edi, xmit_buff+128 |
jb .write |
sub edi, 128 |
sub edi, ebx |
.clip: |
and edi, 127 |
jmp .write |
|
.done: |
cmp [com_state], TRANSMIT |
mov [eax+UART.xmit_wp], edi |
cmp [eax+UART.state], UART_TRANSMIT |
je @F |
mov ebx, eax |
call transmit |
@@: |
ret |
|
align 4 |
com_isr: |
com_2_isr: |
mov ebx, [com2] |
jmp com_1_isr.get_info |
align 4 |
com_1_isr: |
mov ebx, [com1] |
|
.get_info: |
mov dx, COM_IIR |
mov edx, [ebx+UART.base] |
add edx, IIR_REG |
in al, dx |
|
test al, IIR_INTR |
498,35 → 657,50 |
|
align 4 |
isr_line: |
mov edx, COM_LSR |
mov edx, [ebx+UART.base] |
add edx, LSR_REG |
in al, dx |
ret |
|
align 4 |
isr_recieve: |
mov edx, COM_THR |
mov edx, [ebx+UART.base] |
in al, dx |
ret |
|
align 4 |
isr_modem: |
mov edx, COM_MSR |
mov edx, [ebx+UART.base] |
add edx, MSR_REG |
in al, dx |
ret |
|
|
align 4 |
com1 dd 0 |
com2 dd 0 |
|
align 4 |
uart_func dd 0 ;get version |
dd 0 ;open port |
dd close_port |
uart_func dd 0 ;SRV_GETVERSION |
dd 0 ;PORT_OPEN |
dd uart_close ;PORT_CLOSE |
dd 0 ;PORT_RESET |
dd uart_set_mode ;PORT_SETMODE |
; dd uart.get_mode ;PORT_GETMODE |
; dd uart.set_mcr ;PORT_SETMCR |
;PORT_GETMCR equ 7 |
;PORT_READ equ 8 |
;PORT_WRITE equ 9 |
|
|
|
|
isr_action dd isr_modem |
dd transmit |
dd isr_recieve |
dd isr_line |
|
;version dd 0x00040000 |
|
divisor dw 2304, 1536, 1047, 857, 768, 384 |
dw 192, 96, 64, 58, 48, 32 |
536,33 → 710,5 |
|
sz_uart_srv db 'UART',0 |
|
;version dd 0x00040000 |
|
|
align 4 |
|
com1 dd ? |
com2 dd ? |
|
rcvr_rp dd ? |
rcvr_wp dd ? |
rcvr_free dd ? |
rcvr_count dd ? |
|
xmit_rp dd ? |
xmit_wp dd ? |
xmit_free dd ? |
xmit_count dd ? |
|
lcr_reg dd ? |
mcr_reg dd ? |
rate dd ? |
mode dd ? |
com_state dd ? |
|
connection dd ? |
|
align 128 |
rcvr_buff rb 128 |
xmit_buff rb 128 |
|