From eed77bd2970a00d1394ed027ceca5b646e4671ce Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Wed, 17 Jun 2020 18:31:46 +0200
Subject: Started rewrite

---
 src/kernel/pci/pci.c | 140 ---------------------------------------------------
 1 file changed, 140 deletions(-)
 delete mode 100644 src/kernel/pci/pci.c

(limited to 'src/kernel/pci/pci.c')

diff --git a/src/kernel/pci/pci.c b/src/kernel/pci/pci.c
deleted file mode 100644
index 6eca302..0000000
--- a/src/kernel/pci/pci.c
+++ /dev/null
@@ -1,140 +0,0 @@
-#include <io/io.h>
-#include <lib/lib.h>
-#include <pci/pci.h>
-#include <stdint.h>
-#include <system.h>
-
-void pci_write_field(u32 device, int field, u32 value)
-{
-	outl(PCI_ADDRESS_PORT, pci_get_addr(device, field));
-	outl(PCI_VALUE_PORT, value);
-}
-
-u32 pci_read_field(u32 device, int field, int size)
-{
-	outl(PCI_ADDRESS_PORT, pci_get_addr(device, field));
-
-	if (size == 4) {
-		u32 t = inl(PCI_VALUE_PORT);
-		return t;
-	} else if (size == 2) {
-		u16 t = inw((u16)(PCI_VALUE_PORT + (field & 2)));
-		return t;
-	} else if (size == 1) {
-		u8 t = inb((u16)(PCI_VALUE_PORT + (field & 3)));
-		return t;
-	}
-	return 0xFFFF;
-}
-
-u16 pci_find_type(u32 dev)
-{
-	return (u16)((pci_read_field(dev, PCI_CLASS, 1) << 8) |
-		     pci_read_field(dev, PCI_SUBCLASS, 1));
-}
-
-void pci_scan_hit(pci_func_t f, u32 dev, void *extra)
-{
-	int dev_vend = (int)pci_read_field(dev, PCI_VENDOR_ID, 2);
-	int dev_dvid = (int)pci_read_field(dev, PCI_DEVICE_ID, 2);
-
-	f(dev, (u16)dev_vend, (u16)dev_dvid, extra);
-}
-
-void pci_scan_func(pci_func_t f, int type, int bus, int slot, int func, void *extra)
-{
-	u32 dev = pci_box_device(bus, slot, func);
-	if (type == -1 || type == pci_find_type(dev))
-		pci_scan_hit(f, dev, extra);
-	if (pci_find_type(dev) == PCI_TYPE_BRIDGE)
-		pci_scan_bus(f, type, (int)pci_read_field(dev, PCI_SECONDARY_BUS, 1), extra);
-}
-
-void pci_scan_slot(pci_func_t f, int type, int bus, int slot, void *extra)
-{
-	u32 dev = pci_box_device(bus, slot, 0);
-	if (pci_read_field(dev, PCI_VENDOR_ID, 2) == PCI_NONE)
-		return;
-	pci_scan_func(f, type, bus, slot, 0, extra);
-	if (!pci_read_field(dev, PCI_HEADER_TYPE, 1))
-		return;
-	for (int func = 1; func < 8; func++) {
-		dev = pci_box_device(bus, slot, func);
-		if (pci_read_field(dev, PCI_VENDOR_ID, 2) != PCI_NONE)
-			pci_scan_func(f, type, bus, slot, func, extra);
-	}
-}
-
-void pci_scan_bus(pci_func_t f, int type, int bus, void *extra)
-{
-	for (int slot = 0; slot < 32; ++slot)
-		pci_scan_slot(f, type, bus, slot, extra);
-}
-
-void pci_scan(pci_func_t f, int type, void *extra)
-{
-	if ((pci_read_field(0, PCI_HEADER_TYPE, 1) & 0x80) == 0) {
-		pci_scan_bus(f, type, 0, extra);
-		return;
-	}
-
-	for (int func = 0; func < 8; ++func) {
-		u32 dev = pci_box_device(0, 0, func);
-		if (pci_read_field(dev, PCI_VENDOR_ID, 2) != PCI_NONE)
-			pci_scan_bus(f, type, func, extra);
-		else
-			break;
-	}
-}
-
-static void find_isa_bridge(u32 device, u16 vendor_id, u16 device_id, void *extra)
-{
-	if (vendor_id == 0x8086 && (device_id == 0x7000 || device_id == 0x7110))
-		*((u32 *)extra) = device;
-}
-
-static u32 pci_isa = 0;
-static u8 pci_remaps[4] = { 0 };
-
-void pci_remap()
-{
-	pci_scan(&find_isa_bridge, -1, &pci_isa);
-	if (pci_isa) {
-		for (int i = 0; i < 4; ++i) {
-			pci_remaps[i] = (u8)pci_read_field(pci_isa, 0x60 + i, 1);
-			if (pci_remaps[i] == 0x80) {
-				pci_remaps[i] = (u8)(10 + (i % 1));
-			}
-		}
-		u32 out = 0;
-		memcpy(&out, &pci_remaps, 4);
-		pci_write_field(pci_isa, 0x60, out);
-	}
-}
-
-int pci_get_interrupt(u32 device)
-{
-	if (pci_isa) {
-		u32 irq_pin = pci_read_field(device, 0x3D, 1);
-		if (irq_pin == 0)
-			return (int)pci_read_field(device, PCI_INTERRUPT_LINE, 1);
-		int pirq = (int)(irq_pin + pci_extract_slot(device) - 2) % 4;
-		int int_line = (int)pci_read_field(device, PCI_INTERRUPT_LINE, 1);
-
-		if (pci_remaps[pirq] >= 0x80) {
-			if (int_line == 0xFF) {
-				int_line = 10;
-				pci_write_field(device, PCI_INTERRUPT_LINE, (u32)int_line);
-			}
-			pci_remaps[pirq] = (u8)int_line;
-			u32 out = 0;
-			memcpy(&out, &pci_remaps, 4);
-			pci_write_field(pci_isa, 0x60, out);
-			return int_line;
-		}
-		pci_write_field(device, PCI_INTERRUPT_LINE, pci_remaps[pirq]);
-		return pci_remaps[pirq];
-	} else {
-		return (int)pci_read_field(device, PCI_INTERRUPT_LINE, 1);
-	}
-}
\ No newline at end of file
-- 
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