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AGP driver stub

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git-svn-id: svn://kolibrios.org@2899 a494cfbc-eb01-0410-851d-a64ba20cac60
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hidnplayr 2012-08-01 08:33:50 +00:00
parent d96e9cc8af
commit 954d3f5012
1 changed files with 239 additions and 0 deletions
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239
kernel/trunk/drivers/agp.asm Normal file
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
format MS COFF
DEBUG equ 1
API_VERSION equ 1
include 'proc32.inc'
include 'imports.inc'
struc IOCTL
{ .handle dd ?
.io_code dd ?
.input dd ?
.inp_size dd ?
.output dd ?
.out_size dd ?
}
virtual at 0
IOCTL IOCTL
end virtual
public START
public service_proc
public version
DRV_ENTRY equ 1
DRV_EXIT equ -1
SRV_GETVERSION equ 0
SRV_DETECT equ 1
section '.flat' code readable align 16
proc START stdcall, state:dword
cmp [state], 1
jne .exit
.entry:
if DEBUG
mov esi, msgInit
call SysMsgBoardStr
end if
stdcall RegService, my_service, service_proc
ret
.fail:
.exit:
xor eax, eax
ret
endp
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
align 4
proc service_proc stdcall, ioctl:dword
mov ebx, [ioctl]
mov eax, [ebx+io_code]
cmp eax, SRV_GETVERSION
jne @F
mov eax, [ebx+output]
cmp [ebx+out_size], 4
jne .fail
mov [eax], dword API_VERSION
xor eax, eax
ret
@@:
mov ebx, [ioctl]
mov eax, [ebx+io_code]
cmp eax, SRV_DETECT
jne @F
call detect
@@:
.fail:
or eax, -1
ret
endp
restore handle
restore io_code
restore input
restore inp_size
restore output
restore out_size
align 4
proc detect
locals
last_bus dd ?
endl
xor eax, eax
mov [bus], eax
inc eax
call PciApi ; get last bus
cmp eax, -1
je .error
mov [last_bus], eax
.next_bus:
and [devfn], 0
.next_dev:
stdcall PciRead16, [bus], [devfn], dword 0x08 ; read class/subclass
test eax, eax
jz .next
cmp eax, -1
je .next
cmp ax, 0x0302 ; display controller - 3d controller
je .found
cmp ax, 0x0380 ; display controller - other display controller
je .found
.next:
inc [devfn]
cmp [devfn], 256
jb .next_dev
mov eax, [bus]
inc eax
mov [bus], eax
cmp eax, [last_bus]
jna .next_bus
xor eax, eax
ret
.found:
stdcall PciRead8, [bus], [devfn], dword 0x06 ; read prog IF
test al, 1 shl 4 ; got capabilities list?
jnz .got_capabilities_list
.got_capabilities_list:
stdcall PciRead8, [bus], [devfn], dword 0x34 ; read capabilities offset
and eax, 11111100b ; always dword aligned
mov esi, eax
.read_capability:
stdcall PciRead32, [bus], [devfn], esi ; read capability
cmp al, 0x02 ; AGP
je .got_agp
movzx esi, ah ; pointer to next capability
test esi, esi
jnz .read_capability
.error:
xor eax, eax
inc eax
ret
.got_agp:
shl eax, 16
mov [revision], al ; high nibble = major revision
; low nibble = minor revision
add esi, 4
and al, 0xf0
cmp al, 0x30
je .agp_3
.agp_2:
stdcall PciRead32, [bus], [devfn], esi ; read AGP status
test al, 100b
jnz .100b
test al, 10b
jnz .010b
test al, 1b
jz .error
.001b:
mov [speed], 001b
jmp .agp_go
.010b:
mov [speed], 010b
jmp .agp_go
.100b:
mov [speed], 100b
jmp .agp_go
.agp_3:
stdcall PciRead32, [bus], [devfn], esi ; read AGP status
test al, 1 shl 3
jz .agp_2
and al, 11b
mov [speed], al
cmp al, 11b
jne .agp_go
mov [speed], 10b
.agp_go:
add esi, 4
stdcall PciRead32, [bus], [devfn], esi ; read AGP cmd
and al, not 111b ; set max speed
or al, [speed]
or eax, 1 shl 8 ; enable AGP
stdcall PciWrite32, [bus], [devfn], esi, eax ; write AGP cmd
ret
endp
;all initialized data place here
align 4
version dd (5 shl 16) or (API_VERSION and 0xFFFF)
my_service db 'AGP', 0 ; max 16 chars include zero
msgInit db 'detect hardware...', 13, 10, 0
msgPCI db 'PCI acces not supported', 13, 10, 0
msgFail db 'device not found', 13, 10, 0
section '.data' data readable writable align 16
;all uninitialized data place here
revision db ?
speed db ?
bus dd ?
devfn dd ?