kolibrios-gitea/drivers/pci.inc

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; PCI Bus defines
PCI_HEADER_TYPE = 0x0e ; 8 bit
PCI_BASE_ADDRESS_0 = 0x10 ; 32 bit
PCI_BASE_ADDRESS_1 = 0x14 ; 32 bits
PCI_BASE_ADDRESS_2 = 0x18 ; 32 bits
PCI_BASE_ADDRESS_3 = 0x1c ; 32 bits
PCI_BASE_ADDRESS_4 = 0x20 ; 32 bits
PCI_BASE_ADDRESS_5 = 0x24 ; 32 bits
PCI_BASE_ADDRESS_SPACE_IO = 0x01
PCI_BASE_ADDRESS_IO_MASK = 0xFFFFFFFC
PCI_BASE_ADDRESS_MEM_MASK = 0xFFFFFFF0
; PCI programming
PCI_VENDOR_ID = 0x00 ; 16 bit
PCI_DEVICE_ID = 0x02 ; 16 bits
PCI_REG_COMMAND = 0x4 ; command register
PCI_REG_STATUS = 0x6 ; status register
PCI_REVISION_ID = 0x08 ; 8 bits
PCI_REG_LATENCY = 0xd ; latency timer register
PCI_REG_CAP_PTR = 0x34 ; capabilities pointer
PCI_REG_IRQ = 0x3c
PCI_REG_CAPABILITY_ID = 0x0 ; capapility ID in pm register block
PCI_REG_PM_STATUS = 0x4 ; power management status register
PCI_REG_PM_CTRL = 0x4 ; power management control register
PCI_BIT_PIO = 1 ; bit0: io space control
PCI_BIT_MMIO = 2 ; bit1: memory space control
PCI_BIT_MASTER = 4 ; bit2: device acts as a PCI master
macro PCI_find_io {
local .check, .inc, .got
xor eax, eax
mov esi, PCI_BASE_ADDRESS_0
.check:
stdcall PciRead32, [device.pci_bus], [device.pci_dev], esi
test eax, PCI_BASE_ADDRESS_IO_MASK
jz .inc
test eax, PCI_BASE_ADDRESS_SPACE_IO
jz .inc
and eax, PCI_BASE_ADDRESS_IO_MASK
jmp .got
.inc:
add esi, 4
cmp esi, PCI_BASE_ADDRESS_5
jbe .check
xor eax, eax
.got:
mov [device.io_addr], eax
}
macro PCI_find_mmio32 {
local .check, .inc, .got
mov esi, PCI_BASE_ADDRESS_0
.check:
stdcall PciRead32, [device.pci_bus], [device.pci_dev], esi
test eax, PCI_BASE_ADDRESS_SPACE_IO ; mmio address?
jnz .inc
test eax, 100b ; 64 bit?
jnz .inc
and eax, not 1111b
jmp .got
.inc:
add esi, 4
cmp esi, PCI_BASE_ADDRESS_5
jbe .check
xor eax, eax
.got:
mov [device.mmio_addr], eax
}
macro PCI_find_irq {
stdcall PciRead8, [device.pci_bus], [device.pci_dev], PCI_REG_IRQ
mov [device.irq_line], al
}
macro PCI_find_rev {
stdcall PciRead8, [device.pci_bus], [device.pci_dev], PCI_REVISION_ID
mov [device.revision], al
}
macro PCI_make_bus_master bus, dev {
stdcall PciRead32, [device.pci_bus], [device.pci_dev], PCI_REG_COMMAND
or al, PCI_BIT_MASTER
stdcall PciWrite32, [device.pci_bus], [device.pci_dev], PCI_REG_COMMAND, eax
}
macro PCI_adjust_latency min {
local .not
stdcall PciRead8, [device.pci_bus], [device.pci_dev], PCI_REG_LATENCY
cmp al, min
ja .not
mov al, min
stdcall PciWrite8, [device.pci_bus], [device.pci_dev], PCI_REG_LATENCY, eax
.not:
}