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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 "boot.h"␊
10#include "pci.h"␊
11#include "pci_root.h"␊
12␊
13#ifndef DEBUG_PCI␊
14#define DEBUG_PCI 0␊
15#endif␊
16␊
17#if DEBUG_PCI␊
18#define DBG(x...)␉␉verbose(x)␊
19#else␊
20#define DBG(x...)␊
21#endif␊
22␊
23pci_dt_t␉*root_pci_dev;␊
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␉␉␉if (!new)␊
91␉␉␉{␊
92␉␉␉␉continue;␊
93␉␉␉}␊
94␉␉␉bzero(new, sizeof(pci_dt_t));␊
95␉␉␉new->dev.addr␉␉␉␉= pci_addr;␊
96␉␉␉new->vendor_id␉␉␉␉= id & 0xffff;␊
97␉␉␉new->device_id␉␉␉␉= (id >> 16) & 0xffff;␊
98␉␉␉new->subsys_id.subsys_id␉= pci_config_read32(pci_addr, PCI_SUBSYSTEM_VENDOR_ID);␊
99␉␉␉new->class_id␉␉␉␉= pci_config_read16(pci_addr, PCI_CLASS_DEVICE);␊
100␉␉␉new->parent␉= start;␊
101␊
102␉␉␉header_type = pci_config_read8(pci_addr, PCI_HEADER_TYPE);␊
103␉␉␉switch (header_type & 0x7f)␊
104␉␉␉{␊
105␉␉␉case PCI_HEADER_TYPE_BRIDGE:␊
106␉␉␉case PCI_HEADER_TYPE_CARDBUS:␊
107␉␉␉␉secondary_bus = pci_config_read8(pci_addr, PCI_SECONDARY_BUS);␊
108␉␉␉␉if (secondary_bus != 0)␊
109␉␉␉␉{␊
110␉␉␉␉␉scan_pci_bus(new, secondary_bus);␊
111␉␉␉␉}␊
112␉␉␉␉break;␊
113␉␉␉␉default:␊
114␉␉␉␉␉break;␊
115␉␉␉}␊
116␉␉␉*current = new;␊
117␉␉␉current = &new->next;␊
118␊
119␉␉␉if ((func == 0) && ((header_type & 0x80) == 0))␊
120␉␉␉{␊
121␉␉␉␉break;␊
122␉␉␉}␊
123␉␉}␊
124␉}␊
125}␊
126␊
127void enable_pci_devs(void)␊
128{␊
129␉uint16_t id;␊
130␉uint32_t rcba, *fd;␊
131␊
132␉id = pci_config_read16(PCIADDR(0, 0x00, 0), 0x00);␊
133␉/* make sure we're on Intel chipset */␊
134␉if (id != 0x8086)␊
135␉␉return;␊
136␉rcba = pci_config_read32(PCIADDR(0, 0x1f, 0), 0xf0) & ~1;␊
137␉fd = (uint32_t *)(rcba + 0x3418);␊
138␉/* set SMBus Disable (SD) to 0 */␊
139␉*fd &= ~0x8;␊
140␉/* and all devices? */␊
141␉//*fd = 0x1;␊
142}␊
143␊
144␊
145void build_pci_dt(void)␊
146{␊
147␉root_pci_dev = malloc(sizeof(pci_dt_t));␊
148␊
149␉if (!root_pci_dev)␊
150␉{␊
151␉␉return;␊
152␉}␊
153␉gRootPCIDev = (void*)root_pci_dev;␊
154␉bzero(root_pci_dev, sizeof(pci_dt_t));␊
155␉enable_pci_devs();␊
156␉scan_pci_bus(root_pci_dev, 0);␊
157␊
158#if DEBUG_PCI␊
159␉dump_pci_dt(root_pci_dev->children);␊
160␉pause();␊
161#endif␊
162}␊
163␊
164static char dev_path[256];␊
165char *get_pci_dev_path(pci_dt_t *pci_dt)␊
166{␊
167␉pci_dt_t␉*current;␊
168␉pci_dt_t␉*end;␊
169␉char␉␉tmp[64];␊
170␊
171␉dev_path[0] = 0;␊
172␉end = root_pci_dev;␊
173␉␊
174␉int uid = getPciRootUID();␊
175␉while (end != pci_dt)␊
176␉{␊
177␉␉current = pci_dt;␊
178␉␉while (current->parent != end)␊
179␉␉␉current = current->parent;␉␉␉␊
180␉␉end = current;␊
181␉␉if (current->parent == root_pci_dev)␊
182␉␉{␊
183␉␉␉sprintf(tmp, "PciRoot(0x%x)/Pci(0x%x,0x%x)", uid, ␊
184␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
185␉␉}␊
186␉␉else␊
187␉␉{␊
188␉␉␉sprintf(tmp, "/Pci(0x%x,0x%x)", ␊
189␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
190␉␉}␊
191␉␉strcat(dev_path, tmp);␊
192␉}␊
193␉return dev_path;␊
194}␊
195␊
196void dump_pci_dt(pci_dt_t *pci_dt)␊
197{␊
198␉pci_dt_t␉*current;␊
199␊
200␉current = pci_dt;␊
201␉while (current)␊
202␉{␊
203␉␉printf("%02x:%02x.%x [%04x%02x] [%04x:%04x] (subsys [%04x:%04x]):: %s\n", ␊
204␉␉␉current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊
205␉␉␉current->class_id, current->vendor_id, current->device_id, ␊
206␉␉␉current->subsys_id.subsys.vendor_id, current->subsys_id.subsys.device_id, ␊
207␉␉␉get_pci_dev_path(current));␊
208␉␉dump_pci_dt(current->children);␊
209␉␉current = current->next;␊
210␉}␊
211}␊
212

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