Chameleon

Chameleon Svn Source Tree

Root/branches/cparm/i386/libsaio/pci.c

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#include "device_inject.h"␊
13␊
14#ifndef DEBUG_PCI␊
15#define DEBUG_PCI 0␊
16#endif␊
17␊
18#if DEBUG_PCI␊
19#define DBG(x...)␉␉printf(x)␊
20#else␊
21#define DBG(x...)␊
22#endif␊
23␊
24pci_dt_t␉*root_pci_dev;␊
25static char* dev_path;␉// TODO: Figure out what is going on here...␊
26␊
27␊
28uint8_t pci_config_read8(uint32_t pci_addr, uint8_t reg)␊
29{␊
30␉pci_addr |= reg & ~3;␊
31␉outl(PCI_ADDR_REG, pci_addr);␊
32␉return inb(PCI_DATA_REG + (reg & 3));␊
33}␊
34␊
35uint16_t pci_config_read16(uint32_t pci_addr, uint8_t reg)␊
36{␊
37␉pci_addr |= reg & ~3;␊
38␉outl(PCI_ADDR_REG, pci_addr);␊
39␉return inw(PCI_DATA_REG + (reg & 2));␊
40}␊
41␊
42uint32_t pci_config_read32(uint32_t pci_addr, uint8_t reg)␊
43{␊
44␉pci_addr |= reg & ~3;␊
45␉outl(PCI_ADDR_REG, pci_addr);␊
46␉return inl(PCI_DATA_REG);␊
47}␊
48␊
49void pci_config_write8(uint32_t pci_addr, uint8_t reg, uint8_t data)␊
50{␊
51␉pci_addr |= reg & ~3;␊
52␉outl(PCI_ADDR_REG, pci_addr);␊
53␉outb(PCI_DATA_REG + (reg & 3), data);␊
54}␊
55␊
56void pci_config_write16(uint32_t pci_addr, uint8_t reg, uint16_t data)␊
57{␊
58␉pci_addr |= reg & ~3;␊
59␉outl(PCI_ADDR_REG, pci_addr);␊
60␉outw(PCI_DATA_REG + (reg & 2), data);␊
61}␊
62␊
63void pci_config_write32(uint32_t pci_addr, uint8_t reg, uint32_t data)␊
64{␊
65␉pci_addr |= reg & ~3;␊
66␉outl(PCI_ADDR_REG, pci_addr);␊
67␉outl(PCI_DATA_REG, data);␊
68}␊
69␊
70void scan_pci_bus(pci_dt_t *start, uint8_t bus)␊
71{␊
72␉pci_dt_t␉*new;␊
73␉pci_dt_t␉**current = &start->children;␊
74␉uint32_t␉id;␊
75␉uint32_t␉pci_addr;␊
76␉uint8_t␉␉dev;␊
77␉uint8_t␉␉func;␊
78␉uint8_t␉␉secondary_bus;␊
79␉uint8_t␉␉header_type;␊
80␉␊
81␉for (dev = 0; dev < 32; dev++)␊
82␉{␊
83␉␉for (func = 0; func < 8; func++)␊
84␉␉{␊
85␉␉␉pci_addr = PCIADDR(bus, dev, func);␊
86␉␉␉id = pci_config_read32(pci_addr, PCI_VENDOR_ID);␊
87␉␉␉if (!id || id == 0xffffffff)␊
88␉␉␉{␊
89␉␉␉␉continue;␊
90␉␉␉}␊
91␉␉␉new = (pci_dt_t*)malloc(sizeof(pci_dt_t));␊
92␉␉␉bzero(new, sizeof(pci_dt_t));␊
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->class_id␉= pci_config_read16(pci_addr, PCI_CLASS_DEVICE);␊
98␉␉␉new->parent␉= start;␊
99␉␉␉␊
100␉␉␉header_type = pci_config_read8(pci_addr, PCI_HEADER_TYPE);␊
101␉␉␉switch (header_type & 0x7f)␊
102␉␉␉{␊
103␉␉␉␉case PCI_HEADER_TYPE_BRIDGE:␊
104␉␉␉␉case PCI_HEADER_TYPE_CARDBUS:␊
105␉␉␉␉␉secondary_bus = pci_config_read8(pci_addr, PCI_SECONDARY_BUS);␊
106␉␉␉␉␉if (secondary_bus != 0)␊
107␉␉␉␉␉{␊
108␉␉␉␉␉␉scan_pci_bus(new, secondary_bus);␊
109␉␉␉␉␉}␊
110␉␉␉␉␉break;␊
111␉␉␉␉default:␊
112␉␉␉␉␉break;␊
113␉␉␉}␊
114␉␉␉*current = new;␊
115␉␉␉current = &new->next;␊
116␉␉␉␊
117␉␉␉if ((func == 0) && ((header_type & 0x80) == 0))␊
118␉␉␉{␊
119␉␉␉␉break;␊
120␉␉␉}␊
121␉␉}␊
122␉}␊
123}␊
124␊
125void enable_pci_devs(void)␊
126{␊
127␉uint16_t id;␊
128␉uint32_t rcba, *fd;␊
129␉␊
130␉id = pci_config_read16(PCIADDR(0, 0x00, 0), 0x00);␊
131␉/* make sure we're on Intel chipset */␊
132␉if (id != 0x8086)␊
133␉␉return;␊
134␉rcba = pci_config_read32(PCIADDR(0, 0x1f, 0), 0xf0) & ~1;␊
135␉fd = (uint32_t *)(rcba + 0x3418);␊
136␉/* set SMBus Disable (SD) to 0 */␊
137␉*fd &= ~0x8;␊
138␉/* and all devices? */␊
139␉//*fd = 0x1;␊
140}␊
141␊
142␊
143void build_pci_dt(void)␊
144{␊
145␉dev_path = malloc(sizeof(char) * 256);␉// TODO: remove␊
146␉␊
147␉root_pci_dev = malloc(sizeof(pci_dt_t));␊
148␉bzero(root_pci_dev, sizeof(pci_dt_t));␊
149␉enable_pci_devs();␊
150␉scan_pci_bus(root_pci_dev, 0);␊
151#if DEBUG_PCI␊
152#ifndef OPTION_ROM␊
153␉dump_pci_dt(root_pci_dev->children);␊
154␉pause();␊
155#endif␊
156#endif␊
157}␊
158␊
159char *get_pci_dev_path(pci_dt_t *pci_dt)␊
160{␊
161␉char* buffer = malloc(sizeof(char) * 256);␊
162␊
163␉pci_dt_t␉*current;␊
164␉pci_dt_t␉*end;␊
165␉char␉␉tmp[64];␊
166␉␊
167␉buffer[0] = 0;␉␊
168␉end = root_pci_dev;␊
169␉␊
170␉int uid = getPciRootUID();␊
171␉while (end != pci_dt)␊
172␉{␊
173␉␉current = pci_dt;␊
174␉␉while (current->parent != end)␊
175␉␉␉current = current->parent;␉␉␉␊
176␉␉end = current;␊
177␉␉if (current->parent == root_pci_dev)␊
178␉␉{␊
179␉␉␉sprintf(tmp, "PciRoot(0x%x)/Pci(0x%x,0x%x)", uid, ␊
180␉␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
181␉␉} ␊
182␉␉else ␊
183␉␉{␊
184␉␉␉sprintf(tmp, "/Pci(0x%x,0x%x)", ␊
185␉␉␉␉␉current->dev.bits.dev, current->dev.bits.func);␊
186␉␉}␊
187␉␉sprintf(buffer, "%s%s", buffer, tmp);␊
188␉}␊
189␉return buffer;␊
190}␊
191␊
192void setup_pci_devs(pci_dt_t *pci_dt)␊
193{␊
194␉pci_dt_t *current = pci_dt;␊
195␉␊
196␉while (current)␊
197␉{␉␉␊
198␉␉execute_hook("PCIDevice", current, NULL/* &ret*/, 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

Archive Download this file

Revision: 1468