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1/*␊
2 * usb.c␊
3 * ␊
4 *␊
5 * Created by mackerintel on 12/20/08.␊
6 * Copyright 2008 mackerintel. All rights reserved.␊
7 *␊
8 */␊
9␊
10#include "libsaio.h"␊
11#include "boot.h"␊
12#include "bootstruct.h"␊
13#include "pci.h"␊
14␊
15#ifndef DEBUG_USB␊
16#define DEBUG_USB 0␊
17#endif␊
18␊
19#if DEBUG_USB␊
20#define DBG(x...)␉printf(x)␊
21#else␊
22#define DBG(x...)␊
23#endif␊
24␊
25int ehci_acquire (pci_dt_t *pci_dev)␊
26{␊
27␉int␉␉j, k;␊
28␉uint32_t␉base;␊
29␉uint8_t␉␉eecp;␊
30␉uint8_t␉␉legacy[8];␊
31␉bool␉␉isOwnershipConflict;␉␊
32␉bool␉␉alwaysHardBIOSReset;␊
33␊
34␉alwaysHardBIOSReset = false;␉␊
35␉if (!getBoolForKey(kEHCIhard, &alwaysHardBIOSReset, &bootInfo->bootConfig)) {␊
36␉␉alwaysHardBIOSReset = true;␊
37␉}␊
38␊
39␉pci_config_write16(pci_dev->dev.addr, 0x04, 0x0002);␊
40␉base = pci_config_read32(pci_dev->dev.addr, 0x10);␊
41␊
42␉verbose("EHCI controller [%04x:%04x] at %02x:%2x.%x DMA @%x\n", ␊
43␉␉pci_dev->vendor_id, pci_dev->device_id,␊
44␉␉pci_dev->dev.bits.bus, pci_dev->dev.bits.dev, pci_dev->dev.bits.func, ␊
45␉␉base);␊
46␊
47␉if (*((unsigned char*)base) < 0xc)␊
48␉{␊
49␉␉DBG("Config space too small: no legacy implementation\n");␊
50␉␉return 1;␊
51␉}␊
52␉eecp = *((unsigned char*)(base + 9));␊
53␉if (!eecp) {␊
54␉␉DBG("No extended capabilities: no legacy implementation\n");␊
55␉␉return 1;␊
56␉}␊
57␊
58␉DBG("eecp=%x\n",eecp);␊
59␊
60␉// bad way to do it␊
61␉// pci_conf_write(pci_dev->dev.addr, eecp, 4, 0x01000001);␊
62␉for (j = 0; j < 8; j++) {␊
63␉␉legacy[j] = pci_config_read8(pci_dev->dev.addr, eecp + j);␊
64␉␉DBG("%02x ", legacy[j]);␊
65␉}␊
66␉DBG("\n");␊
67␊
68␉//Real Job: based on orByte's AppleUSBEHCI.cpp␊
69␉//We try soft reset first - some systems hang on reboot with hard reset␊
70␉// Definitely needed during reboot on 10.4.6␊
71␊
72␉isOwnershipConflict = ((legacy[3] & 1 != 0) && (legacy[2] & 1 != 0));␊
73␉if (!alwaysHardBIOSReset && isOwnershipConflict) {␊
74␉␉DBG("EHCI - Ownership conflict - attempting soft reset ...\n");␊
75␉␉DBG("EHCI - toggle OS Ownership to 0\n");␊
76␉␉pci_config_write8(pci_dev->dev.addr, eecp + 3, 0);␊
77␉␉for (k = 0; k < 25; k++) {␊
78␉␉␉for (j = 0; j < 8; j++) {␊
79␉␉␉␉legacy[j] = pci_config_read8(pci_dev->dev.addr, eecp + j);␊
80␉␉␉}␊
81␉␉␉if (legacy[3] == 0) {␊
82␉␉␉␉break;␊
83␉␉␉}␊
84␉␉␉delay(10);␊
85␉␉}␊
86␉}␉␊
87␊
88␉DBG("Found USBLEGSUP_ID - value %x:%x - writing OSOwned\n", legacy[3],legacy[2]);␊
89␉pci_config_write8(pci_dev->dev.addr, eecp + 3, 1);␊
90␊
91␉// wait for kEHCI_USBLEGSUP_BIOSOwned bit to clear␊
92␉for (k = 0; k < 25; k++) {␊
93␉␉for (j = 0;j < 8; j++) {␊
94␉␉␉legacy[j] = pci_config_read8(pci_dev->dev.addr, eecp + j);␊
95␉␉}␊
96␉␉DBG ("%x:%x,",legacy[3],legacy[2]);␊
97␉␉if (legacy[2] == 0) {␊
98␉␉␉break;␊
99␉␉}␊
100␉␉delay(10);␊
101␉}␊
102␊
103␉for (j = 0;j < 8; j++) {␊
104␉␉legacy[j] = pci_config_read8(pci_dev->dev.addr, eecp + j);␊
105␉}␊
106␉isOwnershipConflict = ((legacy[2]) != 0);␊
107␉if (isOwnershipConflict) {␊
108␉␉// Soft reset has failed. Assume SMI being ignored␊
109␉␉// Hard reset␊
110␉␉// Force Clear BIOS BIT␊
111␉␉DBG("EHCI - Ownership conflict - attempting hard reset ...\n");␉␉␉␊
112␉␉DBG ("%x:%x\n",legacy[3],legacy[2]);␊
113␉␉DBG("EHCI - Force BIOS Ownership to 0\n");␊
114␊
115␉␉pci_config_write8(pci_dev->dev.addr, eecp + 2, 0);␊
116␉␉for (k = 0; k < 25; k++) {␊
117␉␉␉for (j = 0; j < 8; j++) {␊
118␉␉␉␉legacy[j] = pci_config_read8(pci_dev->dev.addr, eecp + j);␊
119␉␉␉}␊
120␉␉␉DBG ("%x:%x,",legacy[3],legacy[2]);␊
121␊
122␉␉␉if ((legacy[2]) == 0) {␊
123␉␉␉␉break;␊
124␉␉␉}␊
125␉␉␉delay(10);␉␊
126␉␉}␉␉␊
127␉␉// Disable further SMI events␊
128␉␉for (j = 4; j < 8; j++) {␊
129␉␉␉pci_config_write8(pci_dev->dev.addr, eecp + j, 0);␊
130␉␉}␊
131␉}␊
132␊
133␉for (j = 0; j < 8; j++) {␊
134␉␉legacy[j] = pci_config_read8(pci_dev->dev.addr, eecp + j);␊
135␉}␊
136␊
137␉DBG ("%x:%x\n",legacy[3],legacy[2]);␊
138␊
139␉// Final Ownership Resolution Check...␊
140␉if (legacy[2] & 1) {␉␉␉␉␉␊
141␉␉DBG("EHCI controller unable to take control from BIOS\n");␊
142␉␉return 0;␊
143␉}␊
144␊
145␉DBG("EHCI Acquire OS Ownership done\n");␉␊
146␉return 1;␊
147}␊
148␊
149int uhci_reset (pci_dt_t *pci_dev)␊
150{␊
151␉uint32_t base, port_base;␊
152␉␊
153␉base = pci_config_read32(pci_dev->dev.addr, 0x20);␊
154␉port_base = (base >> 5) & 0x07ff;␊
155␊
156␉verbose("UHCI controller [%04x:%04x] at %02x:%2x.%x base %x(%x)\n", ␊
157␉␉pci_dev->vendor_id, pci_dev->device_id,␊
158␉␉pci_dev->dev.bits.bus, pci_dev->dev.bits.dev, pci_dev->dev.bits.func, ␊
159␉␉port_base, base);␊
160␉␊
161␉pci_config_write16(pci_dev->dev.addr, 0xc0, 0x8f00);␊
162␊
163␉outw (port_base, 0x0002);␊
164␉delay(10);␊
165␉outw (port_base+4,0);␊
166␉delay(10);␊
167␉outw (port_base,0);␊
168␉return 1;␊
169}␊
170

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