569 lines
11 KiB
NASM
569 lines
11 KiB
NASM
|
|
;OS_BASE equ 0x80000000
|
|
;new_app_base equ 0x60400000
|
|
;PROC_BASE equ OS_BASE+0x0080000
|
|
|
|
struc IOCTL
|
|
{ .handle dd ?
|
|
.io_code dd ?
|
|
.input dd ?
|
|
.inp_size dd ?
|
|
.output dd ?
|
|
.out_size dd ?
|
|
}
|
|
|
|
|
|
;public START
|
|
;public service_proc
|
|
;public version
|
|
|
|
DEBUG equ 1
|
|
|
|
DRV_ENTRY equ 1
|
|
DRV_EXIT equ -1
|
|
|
|
|
|
LCR_5BIT equ 0x00
|
|
LCR_6BIT equ 0x01
|
|
LCR_7BIT equ 0x02
|
|
LCR_8BIT equ 0x03
|
|
LCR_STOP_1 equ 0x00
|
|
LCR_STOP_2 equ 0x04
|
|
LCR_PARITY equ 0x08
|
|
LCR_EVEN equ 0x10
|
|
LCR_STICK equ 0x20
|
|
LCR_BREAK equ 0x40
|
|
LCR_DLAB equ 0x80
|
|
|
|
LSR_DR equ 0x01 ;data ready
|
|
LSR_OE equ 0x02 ;overrun error
|
|
LSR_PE equ 0x04 ;parity error
|
|
LSR_FE equ 0x08 ;framing error
|
|
LSR_BI equ 0x10 ;break interrupt
|
|
LSR_THRE equ 0x20 ;transmitter holding empty
|
|
LSR_TEMT equ 0x40 ;transmitter empty
|
|
LSR_FER equ 0x80 ;FIFO error
|
|
|
|
FCR_EFIFO equ 0x01 ;enable FIFO
|
|
FCR_CRB equ 0x02 ;clear reciever FIFO
|
|
FCR_CXMIT equ 0x04 ;clear transmitter FIFO
|
|
FCR_RDY equ 0x08 ;set RXRDY and TXRDY pins
|
|
FCR_FIFO_1 equ 0x00 ;1 byte trigger
|
|
FCR_FIFO_4 equ 0x40 ;4 bytes trigger
|
|
FCR_FIFO_8 equ 0x80 ;8 bytes trigger
|
|
FCR_FIFO_14 equ 0xC0 ;14 bytes trigger
|
|
|
|
IIR_INTR equ 0x01 ;1= no interrupts
|
|
|
|
IER_RDAI equ 0x01 ;reciever data interrupt
|
|
IER_THRI equ 0x02 ;transmitter empty interrupt
|
|
IER_LSI equ 0x04 ;line status interrupt
|
|
IER_MSI equ 0x08 ;modem status interrupt
|
|
|
|
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_LOOP equ 0x10 ;lopback mode
|
|
|
|
MSR_DCTS equ 0x01 ;delta clear to send
|
|
MSR_DDSR equ 0x02 ;delta data set redy
|
|
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
|
|
RATE_110 equ 2
|
|
RATE_134 equ 3
|
|
RATE_150 equ 4
|
|
RATE_300 equ 5
|
|
RATE_600 equ 6
|
|
RATE_1200 equ 7
|
|
RATE_1800 equ 8
|
|
RATE_2000 equ 9
|
|
RATE_2400 equ 10
|
|
RATE_3600 equ 11
|
|
RATE_4800 equ 12
|
|
RATE_7200 equ 13
|
|
RATE_9600 equ 14
|
|
RATE_19200 equ 15
|
|
RATE_38400 equ 16
|
|
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_IRQ equ 4
|
|
COM_2_IRQ equ 3
|
|
TRANSMIT equ 1
|
|
|
|
|
|
struc COMPORT
|
|
{
|
|
.base dd ?
|
|
.lcr_reg dd ?
|
|
.mcr_reg dd ?
|
|
.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 ?
|
|
.xmit_buffer rb 128
|
|
.rcvr_buffer rb 128
|
|
}
|
|
virtual at 0
|
|
COMPORT COMPORT
|
|
end virtual
|
|
|
|
COMPORT_SIZE equ 256+15*4
|
|
|
|
UART_VERSION equ 0x00000000
|
|
|
|
init_com:
|
|
mov eax, COMPORT_SIZE
|
|
call malloc
|
|
test eax, eax
|
|
jz .fail
|
|
|
|
mov [com1], eax
|
|
mov edi, eax
|
|
mov ecx, COMPORT_SIZE/4
|
|
xor eax, eax
|
|
cld
|
|
rep stosd
|
|
|
|
call reset
|
|
|
|
stdcall attach_int_handler, COM_1_IRQ, com_isr
|
|
stdcall reg_service, sz_uart_srv, uart_proc
|
|
ret
|
|
.fail:
|
|
xor eax, eax
|
|
ret
|
|
|
|
handle equ IOCTL.handle
|
|
io_code equ IOCTL.io_code
|
|
input equ IOCTL.input
|
|
inp_size equ IOCTL.inp_size
|
|
output equ IOCTL.output
|
|
out_size equ IOCTL.out_size
|
|
|
|
SRV_GETVERSION equ 0
|
|
PORT_OPEN equ 1
|
|
PORT_CLOSE equ 2
|
|
PORT_RESET equ 3
|
|
PORT_SETMODE equ 4
|
|
PORT_GETMODE equ 5
|
|
PORT_SETMCR equ 6
|
|
PORT_GETMCR equ 7
|
|
PORT_READ equ 8
|
|
PORT_WRITE equ 9
|
|
|
|
align 4
|
|
proc uart_proc stdcall, ioctl:dword
|
|
|
|
mov ebx, [ioctl]
|
|
mov eax, [ebx+io_code]
|
|
cmp eax, PORT_WRITE
|
|
ja .fail
|
|
|
|
cmp eax, SRV_GETVERSION
|
|
jne @F
|
|
|
|
mov eax, [ebx+output]
|
|
mov eax, [eax]
|
|
mov [eax], dword UART_VERSION
|
|
xor eax, eax
|
|
ret
|
|
@@:
|
|
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
|
|
ret
|
|
|
|
.fail:
|
|
or eax, -1
|
|
ret
|
|
|
|
endp
|
|
|
|
restore handle
|
|
restore io_code
|
|
restore input
|
|
restore inp_size
|
|
restore output
|
|
restore out_size
|
|
|
|
|
|
open_port:
|
|
ret
|
|
|
|
; param
|
|
; edx= port
|
|
; esi= input data
|
|
; edi= output data
|
|
;
|
|
; retval
|
|
; eax=0 success
|
|
; eax <>0 error
|
|
|
|
align 4
|
|
close_port:
|
|
|
|
call reset
|
|
mov [edx+COMPORT.connection], 0
|
|
xor eax, eax
|
|
ret
|
|
|
|
|
|
; 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 eax,FCR_EFIFO+FCR_CRB+FCR_CXMIT+FCR_FIFO_14
|
|
mov edx, COM_IIR
|
|
out dx, al
|
|
|
|
.clear_RB:
|
|
mov edx, COM_LSR
|
|
in al, dx
|
|
test eax, LSR_DR
|
|
jz @F
|
|
|
|
mov edx, COM_THR
|
|
in al, dx
|
|
jmp .clear_RB
|
|
@@:
|
|
mov eax,IER_RDAI+IER_THRI+IER_LSI
|
|
mov edx, COM_IER
|
|
out dx, al
|
|
|
|
.clear_IIR:
|
|
mov edx, COM_IIR
|
|
in al, dx
|
|
test al, IIR_INTR
|
|
jnz .done
|
|
|
|
shr eax, 1
|
|
and eax, 3
|
|
jnz @F
|
|
|
|
mov edx, COM_MSR
|
|
in al, dx
|
|
jmp .clear_IIR
|
|
@@:
|
|
cmp eax, 1
|
|
je .clear_IIR
|
|
|
|
cmp eax, 2
|
|
jne @F
|
|
|
|
mov edx, COM_THR
|
|
in al, dx
|
|
jmp .clear_IIR
|
|
@@:
|
|
mov edx, COM_LSR
|
|
in al, dx
|
|
jmp .clear_IIR
|
|
|
|
.done:
|
|
mov edi, rcvr_buff
|
|
xor eax, eax
|
|
mov ecx, 256/4
|
|
|
|
mov [rcvr_rp], edi
|
|
mov [rcvr_wp], edi
|
|
mov [rcvr_free], 128
|
|
;; mov [rcvr_count], 16
|
|
|
|
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
|
|
|
|
align 4
|
|
set_mode:
|
|
cmp eax, RATE_115200
|
|
ja .fail
|
|
|
|
cmp ebx, LCR_BREAK
|
|
jae .fail
|
|
|
|
mov [rate], eax
|
|
mov [mode], ebx
|
|
|
|
mov cx, [divisor+eax*2]
|
|
|
|
mov dx, COM_LCR
|
|
in al, dx
|
|
or al, 0x80
|
|
out dx, al
|
|
|
|
mov dx, COM_THR
|
|
mov al, cl
|
|
out dx, al
|
|
|
|
inc dx
|
|
mov al, ch
|
|
out dx, al
|
|
|
|
mov dx, COM_LCR
|
|
mov eax, ebx
|
|
out dx, al
|
|
.fail:
|
|
ret
|
|
|
|
; param
|
|
; eax= rate constant
|
|
|
|
align 4
|
|
set_rate:
|
|
cmp eax, RATE_115200
|
|
ja .fail
|
|
|
|
mov [rate], eax
|
|
mov bx, [divisor+eax*2]
|
|
|
|
mov dx, COM_LCR
|
|
in al, dx
|
|
or al, 0x80
|
|
out dx, al
|
|
|
|
mov dx, COM_THR
|
|
mov al, bl
|
|
out dx, al
|
|
|
|
inc dx
|
|
mov al, bh
|
|
out dx, al
|
|
|
|
mov dx, COM_LCR
|
|
mov eax, [lcr_reg]
|
|
out dx, al
|
|
.fail:
|
|
ret
|
|
|
|
align 4
|
|
transmit:
|
|
push esi
|
|
mov edx, COM_THR
|
|
|
|
mov [xmit_count], 16
|
|
|
|
pushfd
|
|
cli
|
|
|
|
mov esi, [xmit_rp]
|
|
mov ecx, [xmit_free]
|
|
|
|
cmp ecx, 128
|
|
je .exit
|
|
@@:
|
|
and esi, 127
|
|
mov al, [xmit_buff+esi]
|
|
inc esi
|
|
|
|
out dx, al
|
|
inc ecx
|
|
dec [xmit_count]
|
|
jz .done
|
|
|
|
cmp ecx, 128
|
|
jne @B
|
|
.done:
|
|
add esi, xmit_buff
|
|
mov [xmit_rp], esi
|
|
mov [xmit_free], ecx
|
|
mov [com_state], TRANSMIT
|
|
.exit:
|
|
popfd
|
|
pop esi
|
|
ret
|
|
|
|
|
|
; eax= src
|
|
; ebx= count
|
|
|
|
align 4
|
|
comm_send:
|
|
mov edi, [xmit_wp]
|
|
mov esi, eax
|
|
.write:
|
|
test ebx, ebx
|
|
jz .done
|
|
.wait:
|
|
cmp [xmit_free], 0
|
|
jne .fill
|
|
|
|
cmp [com_state], TRANSMIT
|
|
je .wait
|
|
|
|
call transmit
|
|
jmp .write
|
|
.fill:
|
|
mov ecx, xmit_buff+128
|
|
sub ecx, edi
|
|
cmp ecx, [xmit_free]
|
|
jb @F
|
|
|
|
mov ecx, [xmit_free]
|
|
@@:
|
|
cmp ecx, ebx
|
|
jb @F
|
|
mov ecx, ebx
|
|
@@:
|
|
sub [xmit_free], ecx
|
|
sub ebx, ecx
|
|
|
|
cld
|
|
rep movsb
|
|
|
|
cmp edi, xmit_buff+128
|
|
jb .write
|
|
sub edi, 128
|
|
jmp .write
|
|
|
|
.done:
|
|
cmp [com_state], TRANSMIT
|
|
je @F
|
|
call transmit
|
|
@@:
|
|
ret
|
|
|
|
align 4
|
|
com_isr:
|
|
|
|
.get_info:
|
|
mov dx, COM_IIR
|
|
in al, dx
|
|
|
|
test al, IIR_INTR
|
|
jnz .done
|
|
|
|
shr eax, 1
|
|
and eax, 3
|
|
|
|
call [isr_action+eax*4]
|
|
jmp .get_info
|
|
.done:
|
|
ret
|
|
|
|
align 4
|
|
isr_line:
|
|
mov edx, COM_LSR
|
|
in al, dx
|
|
ret
|
|
|
|
align 4
|
|
isr_recieve:
|
|
mov edx, COM_THR
|
|
in al, dx
|
|
ret
|
|
|
|
align 4
|
|
isr_modem:
|
|
mov edx, COM_MSR
|
|
in al, dx
|
|
ret
|
|
|
|
|
|
|
|
align 4
|
|
uart_func dd 0 ;get version
|
|
dd 0 ;open port
|
|
dd close_port
|
|
|
|
|
|
isr_action dd isr_modem
|
|
dd transmit
|
|
dd isr_recieve
|
|
dd isr_line
|
|
|
|
|
|
divisor dw 2304, 1536, 1047, 857, 768, 384
|
|
dw 192, 96, 64, 58, 48, 32
|
|
dw 24, 16, 12, 6, 3, 2, 1
|
|
|
|
|
|
|
|
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
|
|
|