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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#include "modules.h"␊
12␊
13#ifndef DEBUG_PCI␊
14#define DEBUG_PCI 0␊
15#endif␊
16␊
17#if DEBUG_PCI␊
18#define DBG(x...)␉␉printf(x)␊
19#else␊
20#define DBG(x...)␊
21#endif␊
22␊
23pci_dt_t␉*root_pci_dev;␊
24static char* dev_path;␉// TODO: Figure out what is going on here...␊
25␊
26␊
27uint8_t pci_config_read8(uint32_t pci_addr, uint8_t reg)␊
28{␊
29␉pci_addr |= reg & ~3;␊
30␉outl(PCI_ADDR_REG, pci_addr);␊
31␉return inb(PCI_DATA_REG + (reg & 3));␊
32}␊
33␊
34uint16_t pci_config_read16(uint32_t pci_addr, uint8_t reg)␊
35{␊
36␉pci_addr |= reg & ~3;␊
37␉outl(PCI_ADDR_REG, pci_addr);␊
38␉return inw(PCI_DATA_REG + (reg & 2));␊
39}␊
40␊
41uint32_t pci_config_read32(uint32_t pci_addr, uint8_t reg)␊
42{␊
43␉pci_addr |= reg & ~3;␊
44␉outl(PCI_ADDR_REG, pci_addr);␊
45␉return inl(PCI_DATA_REG);␊
46}␊
47␊
48void pci_config_write8(uint32_t pci_addr, uint8_t reg, uint8_t data)␊
49{␊
50␉pci_addr |= reg & ~3;␊
51␉outl(PCI_ADDR_REG, pci_addr);␊
52␉outb(PCI_DATA_REG + (reg & 3), data);␊
53}␊
54␊
55void pci_config_write16(uint32_t pci_addr, uint8_t reg, uint16_t data)␊
56{␊
57␉pci_addr |= reg & ~3;␊
58␉outl(PCI_ADDR_REG, pci_addr);␊
59␉outw(PCI_DATA_REG + (reg & 2), data);␊
60}␊
61␊
62void pci_config_write32(uint32_t pci_addr, uint8_t reg, uint32_t data)␊
63{␊
64␉pci_addr |= reg & ~3;␊
65␉outl(PCI_ADDR_REG, pci_addr);␊
66␉outl(PCI_DATA_REG, data);␊
67}␊
68␊
69void scan_pci_bus(pci_dt_t *start, uint8_t bus)␊
70{␊
71␉pci_dt_t␉*new;␊
72␉pci_dt_t␉**current = &start->children;␊
73␉uint32_t␉id;␊
74␉uint32_t␉pci_addr;␊
75␉uint8_t␉␉dev;␊
76␉uint8_t␉␉func;␊
77␉uint8_t␉␉secondary_bus;␊
78␉uint8_t␉␉header_type;␊
79␉␊
80␉for (dev = 0; dev < 32; dev++)␊
81␉{␊
82␉␉for (func = 0; func < 8; func++)␊
83␉␉{␊
84␉␉␉pci_addr = PCIADDR(bus, dev, func);␊
85␉␉␉id = pci_config_read32(pci_addr, PCI_VENDOR_ID);␊
86␉␉␉if (!id || id == 0xffffffff)␊
87␉␉␉{␊
88␉␉␉␉continue;␊
89␉␉␉}␊
90␉␉␉new = (pci_dt_t*)malloc(sizeof(pci_dt_t));␊
91␉␉␉bzero(new, sizeof(pci_dt_t));␊
92␉␉␉new->dev.addr␉= pci_addr;␊
93␉␉␉new->vendor_id␉= id & 0xffff;␊
94␉␉␉new->device_id␉= (id >> 16) & 0xffff;␊
95␉␉␉new->subsys_id.subsys_id␉= pci_config_read32(pci_addr, PCI_SUBSYSTEM_VENDOR_ID);␊
96␉␉␉new->class_id␉= pci_config_read16(pci_addr, PCI_CLASS_DEVICE);␊
97␉␉␉new->parent␉= start;␊
98␉␉␉␊
99␉␉␉header_type = pci_config_read8(pci_addr, PCI_HEADER_TYPE);␊
100␉␉␉switch (header_type & 0x7f)␊
101␉␉␉{␊
102␉␉␉␉case PCI_HEADER_TYPE_BRIDGE:␊
103␉␉␉␉case PCI_HEADER_TYPE_CARDBUS:␊
104␉␉␉␉␉secondary_bus = pci_config_read8(pci_addr, PCI_SECONDARY_BUS);␊
105␉␉␉␉␉if (secondary_bus != 0)␊
106␉␉␉␉␉{␊
107␉␉␉␉␉␉scan_pci_bus(new, secondary_bus);␊
108␉␉␉␉␉}␊
109␉␉␉␉␉break;␊
110␉␉␉␉default:␊
111␉␉␉␉␉break;␊
112␉␉␉}␊
113␉␉␉*current = new;␊
114␉␉␉current = &new->next;␊
115␉␉␉␊
116␉␉␉if ((func == 0) && ((header_type & 0x80) == 0))␊
117␉␉␉{␊
118␉␉␉␉break;␊
119␉␉␉}␊
120␉␉}␊
121␉}␊
122}␊
123␊
124void enable_pci_devs(void)␊
125{␊
126␉uint16_t id;␊
127␉uint32_t rcba, *fd;␊
128␉␊
129␉id = pci_config_read16(PCIADDR(0, 0x00, 0), 0x00);␊
130␉/* make sure we're on Intel chipset */␊
131␉if (id != 0x8086)␊
132␉␉return;␊
133␉rcba = pci_config_read32(PCIADDR(0, 0x1f, 0), 0xf0) & ~1;␊
134␉fd = (uint32_t *)(rcba + 0x3418);␊
135␉/* set SMBus Disable (SD) to 0 */␊
136␉*fd &= ~0x8;␊
137␉/* and all devices? */␊
138␉//*fd = 0x1;␊
139}␊
140␊
141␊
142void build_pci_dt(void)␊
143{␊
144␉dev_path = malloc(sizeof(char) * 256);␉// TODO: remove␊
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#if DEBUG_PCI␊
151#ifndef OPTION_ROM␊
152␉dump_pci_dt(root_pci_dev->children);␊
153␉pause();␊
154#endif␊
155#endif␊
156}␊
157␊
158char *get_pci_dev_path(pci_dt_t *pci_dt)␊
159{␊
160␉char* buffer = malloc(sizeof(char) * 256);␊
161␊
162␉pci_dt_t␉*current;␊
163␉pci_dt_t␉*end;␊
164␉char␉␉tmp[64];␊
165␉␊
166␉buffer[0] = 0;␉␊
167␉end = root_pci_dev;␊
168␉␊
169␉int uid = getPciRootUID();␊
170␉while (end != pci_dt)␊
171␉{␊
172␉␉current = pci_dt;␊
173␉␉while (current->parent != end)␊
174␉␉␉current = current->parent;␉␉␉␊
175␉␉end = current;␊
176␉␉if (current->parent == root_pci_dev)␊
177␉␉{␊
178␉␉␉sprintf(tmp, "PciRoot(0x%x)/Pci(0x%x,0x%x)", uid, ␊
179␉␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
180␉␉} ␊
181␉␉else ␊
182␉␉{␊
183␉␉␉sprintf(tmp, "/Pci(0x%x,0x%x)", ␊
184␉␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
185␉␉}␊
186␉␉sprintf(buffer, "%s%s", buffer, tmp);␊
187␉}␊
188␉return buffer;␊
189}␊
190␊
191void setup_pci_devs(pci_dt_t *pci_dt)␊
192{␊
193␉pci_dt_t *current = pci_dt;␊
194␉␊
195␉␊
196␉while (current)␊
197␉{␊
198␉␉execute_hook("PCIDevice", current, NULL, NULL, NULL, NULL, NULL);␊
199␉␉␊
200␉␉setup_pci_devs(current->children);␊
201␉␉current = current->next;␊
202␉}␊
203}␊
204␊
205#ifndef OPTION_ROM␊
206void dump_pci_dt(pci_dt_t *pci_dt)␊
207{␊
208␉pci_dt_t␉*current;␊
209␉␊
210␉current = pci_dt;␊
211␉while (current) ␊
212␉{␊
213␉␉printf("%02x:%02x.%x [%04x] [%04x:%04x] :: %s\n", ␊
214␉␉␉ current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊
215␉␉␉ current->class_id, current->vendor_id, current->device_id, ␊
216␉␉␉ get_pci_dev_path(current));␊
217␉␉dump_pci_dt(current->children);␊
218␉␉current = current->next;␊
219␉}␊
220}␊
221#endif␊
222

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