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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␉␉␉␉continue;␊
87␉␉␉}␊
88␉␉␉new = (pci_dt_t*)malloc(sizeof(pci_dt_t));␊
89␉␉␉if (!new)␊
90␉␉␉␉return;␊
91␉␉␉memset(new, 0, sizeof(pci_dt_t));␊
92␉␉␉␊
93␉␉␉new->dev.addr␉␉␉␉= pci_addr;␊
94␉␉␉new->vendor_id␉␉␉␉= id & 0xffff;␊
95␉␉␉new->device_id␉␉␉␉= (id >> 16) & 0xffff;␊
96␉␉␉new->subsys_id.subsys_id␉= pci_config_read32(pci_addr, PCI_SUBSYSTEM_VENDOR_ID);␊
97␉␉␉new->subclass␉␉␉␉= pci_config_read8(pci_addr, PCI_CLASS_PROG);␊
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␉␉␉␉␉scan_pci_bus(new, secondary_bus);␊
109␉␉␉␉}␊
110␉␉␉␉break;␊
111␉␉␉}␊
112␉␉␉*current = new;␊
113␉␉␉current = &new->next;␊
114␊
115␉␉␉if ((func == 0) && ((header_type & 0x80) == 0))␊
116␉␉␉{␊
117␉␉␉␉break;␊
118␉␉␉}␊
119␉␉}␊
120␉}␊
121}␊
122␊
123void enable_pci_devs(void)␊
124{␊
125␉uint16_t id;␊
126␉uint32_t rcba, *fd;␊
127␊
128␉id = pci_config_read16(PCIADDR(0, 0x00, 0), 0x00);␊
129␉/* make sure we're on Intel chipset */␊
130␉if (id != 0x8086)␊
131␉␉return;␊
132␉rcba = pci_config_read32(PCIADDR(0, 0x1f, 0), 0xf0) & ~1; //this is LPC host␊
133␉fd = (uint32_t *)(rcba + 0x3418);␊
134␉/* set SMBus Disable (SD) to 0 */␊
135␉*fd &= ~0x8;␊
136␉/* and all devices? */␊
137␉//*fd = 0x1;␊
138}␊
139␊
140␊
141void build_pci_dt(void)␊
142{␊
143␉root_pci_dev = malloc(sizeof(pci_dt_t));␊
144␉␊
145␉if (!root_pci_dev)␊
146␉␉return;␊
147␉gRootPCIDev = (void*)root_pci_dev;␊
148␉bzero(root_pci_dev, sizeof(pci_dt_t));␊
149␉enable_pci_devs();␊
150␉scan_pci_bus(root_pci_dev, 0);␊
151#if 1 //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␉␉} else {␊
179␉␉␉sprintf(tmp, "/Pci(0x%x,0x%x)", ␊
180␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
181␉␉}␊
182␉␉strcat(dev_path, tmp);␊
183␉}␊
184␉return dev_path;␊
185}␊
186␊
187void dump_pci_dt(pci_dt_t *pci_dt)␊
188{␊
189␉pci_dt_t␉*current;␊
190␊
191␉current = pci_dt;␊
192␉while (current) {␊
193␉␉msglog("%02x:%02x.%x [%04x%02x] [%04x:%04x] (subsys [%04x:%04x]):: %s\n", ␊
194␉␉␉current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊
195␉␉␉ current->class_id, current->subclass, current->vendor_id, current->device_id, ␊
196␉␉␉current->subsys_id.subsys.vendor_id, current->subsys_id.subsys.device_id, ␊
197␉␉␉get_pci_dev_path(current));␊
198␉␉dump_pci_dt(current->children);␊
199␉␉current = current->next;␊
200␉}␊
201}␊
202

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