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␊
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␉␉␉}␊
111␉␉␉*current = new;␊
112␉␉␉current = &new->next;␊
113␉␉␉␊
114␉␉␉if ((func == 0) && ((header_type & 0x80) == 0))␊
115␉␉␉{␊
116␉␉␉␉break;␊
117␉␉␉}␊
118␉␉}␊
119␉}␊
120}␊
121␊
122void enable_pci_devs(void)␊
123{␊
124␉uint16_t id;␊
125␉uint32_t rcba, *fd;␊
126␉␊
127␉id = pci_config_read16(PCIADDR(0, 0x00, 0), 0x00);␊
128␉/* make sure we're on Intel chipset */␊
129␉if (id != 0x8086)␊
130␉␉return;␊
131␉rcba = pci_config_read32(PCIADDR(0, 0x1f, 0), 0xf0) & ~1;␊
132␉fd = (uint32_t *)(rcba + 0x3418);␊
133␉/* set SMBus Disable (SD) to 0 */␊
134␉*fd &= ~0x8;␊
135␉/* and all devices? */␊
136␉//*fd = 0x1;␊
137}␊
138␊
139␊
140void build_pci_dt(void)␊
141{␊
142␉dev_path = malloc(sizeof(char) * 256);␉// TODO: remove␊
143␉␊
144␉root_pci_dev = malloc(sizeof(pci_dt_t));␊
145␉bzero(root_pci_dev, sizeof(pci_dt_t));␊
146␉enable_pci_devs();␊
147␉scan_pci_bus(root_pci_dev, 0);␊
148#if DEBUG_PCI␊
149#ifndef OPTION_ROM␊
150␉dump_pci_dt(root_pci_dev->children);␊
151␉pause();␊
152#endif␊
153#endif␊
154}␊
155␊
156char *get_pci_dev_path(pci_dt_t *pci_dt)␊
157{␊
158␉char* buffer = malloc(sizeof(char) * 256);␊
159␊
160␉pci_dt_t␉*current;␊
161␉pci_dt_t␉*end;␊
162␉char␉␉tmp[64];␊
163␉␊
164␉buffer[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␉␉sprintf(buffer, "%s%s", buffer, tmp);␊
185␉}␊
186␉return buffer;␊
187}␊
188␊
189void setup_pci_devs(pci_dt_t *pci_dt)␊
190{␊
191␉pci_dt_t *current = pci_dt;␊
192␉␊
193␉␊
194␉while (current)␊
195␉{␊
196␉␉execute_hook("PCIDevice", current, NULL, NULL, NULL, NULL, NULL);␊
197␉␉␊
198␉␉setup_pci_devs(current->children);␊
199␉␉current = current->next;␊
200␉}␊
201}␊
202␊
203#ifndef OPTION_ROM␊
204void dump_pci_dt(pci_dt_t *pci_dt)␊
205{␊
206␉pci_dt_t␉*current;␊
207␉␊
208␉current = pci_dt;␊
209␉while (current) ␊
210␉{␊
211␉␉printf("%02x:%02x.%x [%04x] [%04x:%04x] :: %s\n", ␊
212␉␉␉ current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊
213␉␉␉ current->class_id, current->vendor_id, current->device_id, ␊
214␉␉␉ get_pci_dev_path(current));␊
215␉␉dump_pci_dt(current->children);␊
216␉␉current = current->next;␊
217␉}␊
218}␊
219#endif␊
220

Archive Download this file

Revision: 789