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

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