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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;␊
74␉uint8_t␉␉func;␊
75␉uint8_t␉␉secondary_bus;␊
76␉uint8_t␉␉header_type;␊
77␊
78␉for (dev = 0; dev < 32; dev++)␊
79␉{␊
80␉␉for (func = 0; func < 8; func++)␊
81␉␉{␊
82␉␉␉pci_addr = PCIADDR(bus, dev, func);␊
83␉␉␉id = pci_config_read32(pci_addr, PCI_VENDOR_ID);␊
84␉␉␉if (!id || id == 0xffffffff)␊
85␉␉␉{␊
86␉␉␉␉continue;␊
87␉␉␉}␊
88␉␉␉new = (pci_dt_t*)malloc(sizeof(pci_dt_t));␊
89␉␉␉if (!new)␊
90␉␉␉{␊
91␉␉␉␉continue;␊
92␉␉␉}␊
93␉␉␉bzero(new, sizeof(pci_dt_t));␊
94␉␉␉new->dev.addr␉␉␉␉= pci_addr;␊
95␉␉␉new->vendor_id␉␉␉␉= id & 0xffff;␊
96␉␉␉new->device_id␉␉␉␉= (id >> 16) & 0xffff;␊
97␉␉␉new->subsys_id.subsys_id␉= pci_config_read32(pci_addr, PCI_SUBSYSTEM_VENDOR_ID);␊
98␉␉␉new->class_id␉␉␉␉= pci_config_read16(pci_addr, PCI_CLASS_DEVICE);␊
99␉␉␉new->parent␉= start;␊
100␊
101␉␉␉header_type = pci_config_read8(pci_addr, PCI_HEADER_TYPE);␊
102␉␉␉switch (header_type & 0x7f)␊
103␉␉␉{␊
104␉␉␉case PCI_HEADER_TYPE_BRIDGE:␊
105␉␉␉case PCI_HEADER_TYPE_CARDBUS:␊
106␉␉␉␉secondary_bus = pci_config_read8(pci_addr, PCI_SECONDARY_BUS);␊
107␉␉␉␉if (secondary_bus != 0)␊
108␉␉␉␉␉{␊
109␉␉␉␉␉scan_pci_bus(new, secondary_bus);␊
110␉␉␉␉}␊
111␉␉␉␉break;␊
112␉␉␉␉default:␊
113␉␉␉␉␉break;␊
114␉␉␉}␊
115␉␉␉*current = new;␊
116␉␉␉current = &new->next;␊
117␊
118␉␉␉if ((func == 0) && ((header_type & 0x80) == 0))␊
119␉␉␉{␊
120␉␉␉␉break;␊
121␉␉␉}␊
122␉␉}␊
123␉}␊
124}␊
125␊
126void enable_pci_devs(void)␊
127{␊
128␉uint16_t id;␊
129␉uint32_t rcba, *fd;␊
130␊
131␉id = pci_config_read16(PCIADDR(0, 0x00, 0), 0x00);␊
132␉/* make sure we're on Intel chipset */␊
133␉if (id != 0x8086)␊
134␉␉return;␊
135␉rcba = pci_config_read32(PCIADDR(0, 0x1f, 0), 0xf0) & ~1;␊
136␉fd = (uint32_t *)(rcba + 0x3418);␊
137␉/* set SMBus Disable (SD) to 0 */␊
138␉*fd &= ~0x8;␊
139␉/* and all devices? */␊
140␉//*fd = 0x1;␊
141}␊
142␊
143␊
144void build_pci_dt(void)␊
145{␊
146␉root_pci_dev = malloc(sizeof(pci_dt_t));␊
147␉bzero(root_pci_dev, sizeof(pci_dt_t));␊
148␉enable_pci_devs();␊
149␉scan_pci_bus(root_pci_dev, 0);␊
150␊
151#if DEBUG_PCI␊
152␉dump_pci_dt(root_pci_dev->children);␊
153␉pause();␊
154#endif␊
155}␊
156␊
157static char dev_path[256];␊
158char *get_pci_dev_path(pci_dt_t *pci_dt)␊
159{␊
160␉pci_dt_t␉*current;␊
161␉pci_dt_t␉*end;␊
162␉char␉␉tmp[64];␊
163␊
164␉dev_path[0] = 0;␊
165␉end = root_pci_dev;␊
166␉␊
167␉int uid = getPciRootUID();␊
168␉while (end != pci_dt)␊
169␉{␊
170␉␉current = pci_dt;␊
171␉␉while (current->parent != end)␊
172␉␉␉current = current->parent;␉␉␉␊
173␉␉end = current;␊
174␉␉if (current->parent == root_pci_dev)␊
175␉␉{␊
176␉␉␉sprintf(tmp, "PciRoot(0x%x)/Pci(0x%x,0x%x)", uid, ␊
177␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
178␉␉}␊
179␉␉else␊
180␉␉{␊
181␉␉␉sprintf(tmp, "/Pci(0x%x,0x%x)", ␊
182␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
183␉␉}␊
184␉␉strcat(dev_path, tmp);␊
185␉}␊
186␉return dev_path;␊
187}␊
188␊
189void dump_pci_dt(pci_dt_t *pci_dt)␊
190{␊
191␉pci_dt_t␉*current;␊
192␊
193␉current = pci_dt;␊
194␉while (current)␊
195␉{␊
196␉␉printf("%02x:%02x.%x [%04x] [%04x:%04x] (subsys [%04x:%04x]):: %s\n", ␊
197␉␉␉current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊
198␉␉␉current->class_id, current->vendor_id, current->device_id, ␊
199␉␉␉current->subsys_id.subsys.vendor_id, current->subsys_id.subsys.device_id, ␊
200␉␉␉get_pci_dev_path(current));␊
201␉␉dump_pci_dt(current->children);␊
202␉␉current = current->next;␊
203␉}␊
204}␊
205

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