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Source at commit 548 created 13 years 6 months ago.
By meklort, Bugfixes (hpet, gui, etc)
1/*␊
2 *␊
3 * Copyright 2008 by Islam M. Ahmed Zaid. All rights reserved.␊
4 *␊
5 */␊
6␊
7#include "libsaio.h"␊
8#include "bootstruct.h"␊
9#include "pci.h"␊
10#include "pci_root.h"␊
11␊
12#ifndef DEBUG_PCI␊
13#define DEBUG_PCI 0␊
14#endif␊
15␊
16#if DEBUG_PCI␊
17#define DBG(x...)␉␉printf(x)␊
18#else␊
19#define DBG(x...)␊
20#endif␊
21␊
22pci_dt_t␉*root_pci_dev;␊
23static char* dev_path;␊
24␊
25␊
26uint8_t pci_config_read8(uint32_t pci_addr, uint8_t reg)␊
27{␊
28␉pci_addr |= reg & ~3;␊
29␉outl(PCI_ADDR_REG, pci_addr);␊
30␉return inb(PCI_DATA_REG + (reg & 3));␊
31}␊
32␊
33uint16_t pci_config_read16(uint32_t pci_addr, uint8_t reg)␊
34{␊
35␉pci_addr |= reg & ~3;␊
36␉outl(PCI_ADDR_REG, pci_addr);␊
37␉return inw(PCI_DATA_REG + (reg & 2));␊
38}␊
39␊
40uint32_t pci_config_read32(uint32_t pci_addr, uint8_t reg)␊
41{␊
42␉pci_addr |= reg & ~3;␊
43␉outl(PCI_ADDR_REG, pci_addr);␊
44␉return inl(PCI_DATA_REG);␊
45}␊
46␊
47void pci_config_write8(uint32_t pci_addr, uint8_t reg, uint8_t data)␊
48{␊
49␉pci_addr |= reg & ~3;␊
50␉outl(PCI_ADDR_REG, pci_addr);␊
51␉outb(PCI_DATA_REG + (reg & 3), data);␊
52}␊
53␊
54void pci_config_write16(uint32_t pci_addr, uint8_t reg, uint16_t data)␊
55{␊
56␉pci_addr |= reg & ~3;␊
57␉outl(PCI_ADDR_REG, pci_addr);␊
58␉outw(PCI_DATA_REG + (reg & 2), data);␊
59}␊
60␊
61void pci_config_write32(uint32_t pci_addr, uint8_t reg, uint32_t data)␊
62{␊
63␉pci_addr |= reg & ~3;␊
64␉outl(PCI_ADDR_REG, pci_addr);␊
65␉outl(PCI_DATA_REG, data);␊
66}␊
67␊
68void scan_pci_bus(pci_dt_t *start, uint8_t bus)␊
69{␊
70␉pci_dt_t␉*new;␊
71␉pci_dt_t␉**current = &start->children;␊
72␉uint32_t␉id;␊
73␉uint32_t␉pci_addr;␊
74␉uint8_t␉␉dev;␊
75␉uint8_t␉␉func;␊
76␉uint8_t␉␉secondary_bus;␊
77␉uint8_t␉␉header_type;␊
78␉␊
79␉for (dev = 0; dev < 32; dev++)␊
80␉{␊
81␉␉for (func = 0; func < 8; func++)␊
82␉␉{␊
83␉␉␉pci_addr = PCIADDR(bus, dev, func);␊
84␉␉␉id = pci_config_read32(pci_addr, PCI_VENDOR_ID);␊
85␉␉␉if (!id || id == 0xffffffff)␊
86␉␉␉{␊
87␉␉␉␉continue;␊
88␉␉␉}␊
89␉␉␉new = (pci_dt_t*)malloc(sizeof(pci_dt_t));␊
90␉␉␉bzero(new, sizeof(pci_dt_t));␊
91␉␉␉new->dev.addr␉= pci_addr;␊
92␉␉␉new->vendor_id␉= id & 0xffff;␊
93␉␉␉new->device_id␉= (id >> 16) & 0xffff;␊
94␉␉␉new->class_id␉= pci_config_read16(pci_addr, PCI_CLASS_DEVICE);␊
95␉␉␉new->parent␉= start;␊
96␉␉␉␊
97␉␉␉header_type = pci_config_read8(pci_addr, PCI_HEADER_TYPE);␊
98␉␉␉switch (header_type & 0x7f)␊
99␉␉␉{␊
100␉␉␉␉case PCI_HEADER_TYPE_BRIDGE:␊
101␉␉␉␉case PCI_HEADER_TYPE_CARDBUS:␊
102␉␉␉␉␉secondary_bus = pci_config_read8(pci_addr, PCI_SECONDARY_BUS);␊
103␉␉␉␉␉if (secondary_bus != 0)␊
104␉␉␉␉␉{␊
105␉␉␉␉␉␉scan_pci_bus(new, secondary_bus);␊
106␉␉␉␉␉}␊
107␉␉␉␉␉break;␊
108␉␉␉}␊
109␉␉␉*current = new;␊
110␉␉␉current = &new->next;␊
111␉␉␉␊
112␉␉␉if ((func == 0) && ((header_type & 0x80) == 0))␊
113␉␉␉{␊
114␉␉␉␉break;␊
115␉␉␉}␊
116␉␉}␊
117␉}␊
118}␊
119␊
120void enable_pci_devs(void)␊
121{␊
122␉uint16_t id;␊
123␉uint32_t rcba, *fd;␊
124␉␊
125␉id = pci_config_read16(PCIADDR(0, 0x00, 0), 0x00);␊
126␉/* make sure we're on Intel chipset */␊
127␉if (id != 0x8086)␊
128␉␉return;␊
129␉rcba = pci_config_read32(PCIADDR(0, 0x1f, 0), 0xf0) & ~1;␊
130␉fd = (uint32_t *)(rcba + 0x3418);␊
131␉/* set SMBus Disable (SD) to 0 */␊
132␉*fd &= ~0x8;␊
133␉/* and all devices? */␊
134␉//*fd = 0x1;␊
135}␊
136␊
137␊
138void build_pci_dt(void)␊
139{␊
140␉dev_path = malloc(sizeof(char) * 256);␊
141␉root_pci_dev = malloc(sizeof(pci_dt_t));␊
142␉bzero(root_pci_dev, sizeof(pci_dt_t));␊
143␉enable_pci_devs();␊
144␉scan_pci_bus(root_pci_dev, 0);␊
145#if DEBUG_PCI␊
146␉dump_pci_dt(root_pci_dev->children);␊
147␉pause();␊
148#endif␊
149}␊
150␊
151char *get_pci_dev_path(pci_dt_t *pci_dt)␊
152{␊
153␉pci_dt_t␉*current;␊
154␉pci_dt_t␉*end;␊
155␉char␉␉tmp[64];␊
156␉␊
157␉dev_path[0] = 0;␊
158␉end = root_pci_dev;␊
159␉␊
160␉int uid = getPciRootUID();␊
161␉while (end != pci_dt)␊
162␉{␊
163␉␉current = pci_dt;␊
164␉␉while (current->parent != end)␊
165␉␉␉current = current->parent;␉␉␉␊
166␉␉end = current;␊
167␉␉if (current->parent == root_pci_dev)␊
168␉␉{␊
169␉␉␉sprintf(tmp, "PciRoot(0x%x)/Pci(0x%x,0x%x)", uid, ␊
170␉␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
171␉␉} ␊
172␉␉else ␊
173␉␉{␊
174␉␉␉sprintf(tmp, "/Pci(0x%x,0x%x)", ␊
175␉␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
176␉␉}␊
177␉␉strcat(dev_path, tmp);␊
178␉}␊
179␉return dev_path;␊
180}␊
181␊
182#ifndef OPTION_ROM␊
183void dump_pci_dt(pci_dt_t *pci_dt)␊
184{␊
185␉pci_dt_t␉*current;␊
186␉␊
187␉current = pci_dt;␊
188␉while (current) ␊
189␉{␊
190␉␉printf("%02x:%02x.%x [%04x] [%04x:%04x] :: %s\n", ␊
191␉␉␉ current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊
192␉␉␉ current->class_id, current->vendor_id, current->device_id, ␊
193␉␉␉ get_pci_dev_path(current));␊
194␉␉dump_pci_dt(current->children);␊
195␉␉current = current->next;␊
196␉}␊
197}␊
198#endif␊
199

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