2 ppcskel - a Free Software replacement for the Nintendo/BroadOn bootloader.
5 Copyright (C) 2009 Bernhard Urban <lewurm@gmx.net>
6 Copyright (C) 2009 Sebastian Falbesoner <sebastian.falbesoner@gmail.com>
8 # This code is licensed to you under the terms of the GNU GPL, version 2;
9 # see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
12 #include "bootmii_ppc.h"
13 #include "hollywood.h"
18 static struct ohci_hcca hcca_oh0;
20 static void dbg_op_state()
22 switch (read32(OHCI0_HC_CONTROL) & OHCI_CTRL_HCFS) {
23 case OHCI_USB_SUSPEND:
24 printf("ohci-- OHCI_USB_SUSPEND\n");
27 printf("ohci-- OHCI_USB_RESET\n");
30 printf("ohci-- OHCI_USB_OPER\n");
33 printf("ohci-- OHCI_USB_RESUME\n");
40 printf("ohci-- init\n");
43 /* disable hc interrupts */
44 set32(OHCI0_HC_INT_DISABLE, OHCI_INTR_MIE);
46 /* save fmInterval and calculate FSMPS */
47 #define FSMP(fi) (0x7fff & ((6 * ((fi) - 210)) / 7))
48 #define FI 0x2edf /* 12000 bits per frame (-1) */
49 u32 fmint = read32(OHCI0_HC_FM_INTERVAL) & 0x3fff;
51 printf("ohci-- fminterval delta: %d\n", fmint - FI);
52 fmint |= FSMP (fmint) << 16;
54 /* enable interrupts of both usb host controllers */
55 set32(EHCI_CTL, EHCI_CTL_OH0INTE | EHCI_CTL_OH1INTE | 0xe0000);
58 write32(OHCI0_HC_COMMAND_STATUS, OHCI_HCR);
62 while ((read32(OHCI0_HC_COMMAND_STATUS) & OHCI_HCR) != 0) {
64 printf("ohci-- FAILED");
70 /* disable interrupts; 2ms timelimit here!
71 now we're in the SUSPEND state ... must go OPERATIONAL
72 within 2msec else HC enters RESUME */
74 u32 cookie = irq_kill();
76 /* Tell the controller where the control and bulk lists are
77 * The lists are empty now. */
78 write32(OHCI0_HC_CTRL_HEAD_ED, 0);
79 write32(OHCI0_HC_BULK_HEAD_ED, 0);
82 sync_after_write(&hcca_oh0, 256);
83 write32(OHCI0_HC_HCCA, virt_to_phys(&hcca_oh0));
85 /* set periodicstart */
87 u32 fmInterval = read32(OHCI0_HC_FM_INTERVAL) &0x3fff;
88 u32 fit = read32(OHCI0_HC_FM_INTERVAL) & FIT;
90 write32(OHCI0_HC_FM_INTERVAL, fmint | (fit ^ FIT));
91 write32(OHCI0_HC_PERIODIC_START, ((9*fmInterval)/10)&0x3fff);
94 if ((read32(OHCI0_HC_FM_INTERVAL) & 0x3fff0000) == 0 || !read32(OHCI0_HC_PERIODIC_START)) {
95 printf("ohci-- w00t, fail!! see ohci-hcd.c:669\n");
98 /* start HC operations */
99 write32(OHCI0_HC_CONTROL, OHCI_CONTROL_INIT | OHCI_USB_OPER);
101 /* wake on ConnectStatusChange, matching external hubs */
102 set32(OHCI0_HC_RH_STATUS, RH_HS_DRWE);
104 /* Choose the interrupts we care about now, others later on demand */
105 write32(OHCI0_HC_INT_STATUS, ~0);
106 write32(OHCI0_HC_INT_ENABLE, OHCI_INTR_INIT);
115 /* read interrupt status */
116 u32 flags = read32(OHCI0_HC_INT_STATUS);
118 /* when all bits are set to 1 some problem occured */
119 if (flags == 0xffffffff) {
120 printf("ohci-- Houston, we have a serious problem! :(\n");
124 /* only care about interrupts that are enabled */
125 flags &= read32(OHCI0_HC_INT_ENABLE);
131 printf("OHCI Interrupt occured: ");
132 /* UnrecoverableError */
133 if (flags & OHCI_INTR_UE) {
134 printf("UnrecoverableError\n");
135 /* TODO: well, I don't know... nothing,
136 * because it won't happen anyway? ;-) */
139 /* RootHubStatusChange */
140 if (flags & OHCI_INTR_RHSC) {
141 printf("RootHubStatusChange\n");
142 /* TODO: set some next_statechange variable... */
143 write32(OHCI0_HC_INT_STATUS, OHCI_INTR_RD | OHCI_INTR_RHSC);
146 else if (flags & OHCI_INTR_RD) {
147 printf("ResumeDetected\n");
148 write32(OHCI0_HC_INT_STATUS, OHCI_INTR_RD);
149 /* TODO: figure out what the linux kernel does here... */
152 /* WritebackDoneHead */
153 if (flags & OHCI_INTR_WDH) {
154 printf("WritebackDoneHead\n");
155 /* TODO: figure out what the linux kernel does here... */
158 /* TODO: handle any pending URB/ED unlinks... */
160 #define HC_IS_RUNNING() 1 /* dirty, i know... just a temporary solution */
161 if (HC_IS_RUNNING()) {
162 write32(OHCI0_HC_INT_STATUS, flags);
163 write32(OHCI0_HC_INT_ENABLE, OHCI_INTR_MIE);