Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-12 16:07:30 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/arch/arm/cpu/arm920t/s3c24x0/usb_ohci.c
Simon Glass 13119bc9fb Fix warnings in arch/arm/cpu/arm920t/s3c24x0/usb_ohci.c 
Sorry if this is already fixed somewhere - I could not find it.

This fixes these warnings:

usb_ohci.c: In function 'submit_control_msg':
usb_ohci.c:1081: warning: dereferencing pointer 'data_buf.76' does break strict-aliasing rules
usb_ohci.c:1081: note: initialized from here
usb_ohci.c:1084: warning: dereferencing pointer 'data_buf.76' does break strict-aliasing rules
usb_ohci.c:1084: note: initialized from here
usb_ohci.c:1087: warning: dereferencing pointer 'data_buf.76' does break strict-aliasing rules
usb_ohci.c:1087: note: initialized from here

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2011-12-09 10:32:49 +01:00

1757 lines
45 KiB
C
Raw Blame History

/*
* URB OHCI HCD (Host Controller Driver) for USB on the S3C2400.
*
* (C) Copyright 2003
* Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
*
* Note: Much of this code has been derived from Linux 2.4
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
/*
* IMPORTANT NOTES
* 1 - this driver is intended for use with USB Mass Storage Devices
* (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
*/
#include <common.h>
/* #include <pci.h> no PCI on the S3C24X0 */
#if defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0)
#include <asm/arch/s3c24x0_cpu.h>
#include <asm/io.h>
#include <malloc.h>
#include <usb.h>
#include "usb_ohci.h"
#define OHCI_USE_NPS /* force NoPowerSwitching mode */
#undef OHCI_VERBOSE_DEBUG /* not always helpful */
/* For initializing controller (mask in an HCFS mode too) */
#define OHCI_CONTROL_INIT \
(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
#define min_t(type, x, y) \
({ type __x = (x); type __y = (y); __x < __y ? __x : __y; })
#undef DEBUG
#ifdef DEBUG
#define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
#else
#define dbg(format, arg...) do {} while(0)
#endif /* DEBUG */
#define err(format, arg...) printf("ERROR: " format "\n", ## arg)
#undef SHOW_INFO
#ifdef SHOW_INFO
#define info(format, arg...) printf("INFO: " format "\n", ## arg)
#else
#define info(format, arg...) do {} while(0)
#endif
#define m16_swap(x) swap_16(x)
#define m32_swap(x) swap_32(x)
/* global struct ohci */
static struct ohci gohci;
/* this must be aligned to a 256 byte boundary */
struct ohci_hcca ghcca[1];
/* a pointer to the aligned storage */
struct ohci_hcca *phcca;
/* this allocates EDs for all possible endpoints */
struct ohci_device ohci_dev;
/* urb_priv */
struct urb_priv urb_priv;
/* RHSC flag */
int got_rhsc;
/* device which was disconnected */
struct usb_device *devgone;
/* flag guarding URB transation */
int urb_finished = 0;
/*-------------------------------------------------------------------------*/
/* AMD-756 (D2 rev) reports corrupt register contents in some cases.
* The erratum (#4) description is incorrect. AMD's workaround waits
* till some bits (mostly reserved) are clear; ok for all revs.
*/
#define OHCI_QUIRK_AMD756 0xabcd
#define read_roothub(hc, register, mask) ({ \
u32 temp = readl (&hc->regs->roothub.register); \
if (hc->flags & OHCI_QUIRK_AMD756) \
while (temp & mask) \
temp = readl (&hc->regs->roothub.register); \
temp; })
static u32 roothub_a(struct ohci *hc)
{
return read_roothub(hc, a, 0xfc0fe000);
}
static inline u32 roothub_b(struct ohci *hc)
{
return readl(&hc->regs->roothub.b);
}
static inline u32 roothub_status(struct ohci *hc)
{
return readl(&hc->regs->roothub.status);
}
static u32 roothub_portstatus(struct ohci *hc, int i)
{
return read_roothub(hc, portstatus[i], 0xffe0fce0);
}
/* forward declaration */
static int hc_interrupt(void);
static void td_submit_job(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len,
struct devrequest *setup, struct urb_priv *urb,
int interval);
/*-------------------------------------------------------------------------*
* URB support functions
*-------------------------------------------------------------------------*/
/* free HCD-private data associated with this URB */
static void urb_free_priv(struct urb_priv *urb)
{
int i;
int last;
struct td *td;
last = urb->length - 1;
if (last >= 0) {
for (i = 0; i <= last; i++) {
td = urb->td[i];
if (td) {
td->usb_dev = NULL;
urb->td[i] = NULL;
}
}
}
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
static int sohci_get_current_frame_number(struct usb_device *dev);
/* debug| print the main components of an URB
* small: 0) header + data packets 1) just header */
static void pkt_print(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, struct devrequest *setup, char *str,
int small)
{
struct urb_priv *purb = &urb_priv;
dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
str,
sohci_get_current_frame_number(dev),
usb_pipedevice(pipe),
usb_pipeendpoint(pipe),
usb_pipeout(pipe) ? 'O' : 'I',
usb_pipetype(pipe) < 2 ?
(usb_pipeint(pipe) ? "INTR" : "ISOC") :
(usb_pipecontrol(pipe) ? "CTRL" : "BULK"),
purb->actual_length, transfer_len, dev->status);
#ifdef OHCI_VERBOSE_DEBUG
if (!small) {
int i, len;
if (usb_pipecontrol(pipe)) {
printf(__FILE__ ": cmd(8):");
for (i = 0; i < 8; i++)
printf(" %02x", ((__u8 *) setup)[i]);
printf("\n");
}
if (transfer_len > 0 && buffer) {
printf(__FILE__ ": data(%d/%d):",
purb->actual_length, transfer_len);
len = usb_pipeout(pipe) ?
transfer_len : purb->actual_length;
for (i = 0; i < 16 && i < len; i++)
printf(" %02x", ((__u8 *) buffer)[i]);
printf("%s\n", i < len ? "..." : "");
}
}
#endif
}
/* just for debugging; prints non-empty branches of the
int ed tree inclusive iso eds*/
void ep_print_int_eds(struct ohci *ohci, char *str)
{
int i, j;
__u32 *ed_p;
for (i = 0; i < 32; i++) {
j = 5;
ed_p = &(ohci->hcca->int_table[i]);
if (*ed_p == 0)
continue;
printf(__FILE__ ": %s branch int %2d(%2x):", str, i, i);
while (*ed_p != 0 && j--) {
struct ed *ed = (struct ed *) m32_swap(ed_p);
printf(" ed: %4x;", ed->hwINFO);
ed_p = &ed->hwNextED;
}
printf("\n");
}
}
static void ohci_dump_intr_mask(char *label, __u32 mask)
{
dbg("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
label,
mask,
(mask & OHCI_INTR_MIE) ? " MIE" : "",
(mask & OHCI_INTR_OC) ? " OC" : "",
(mask & OHCI_INTR_RHSC) ? " RHSC" : "",
(mask & OHCI_INTR_FNO) ? " FNO" : "",
(mask & OHCI_INTR_UE) ? " UE" : "",
(mask & OHCI_INTR_RD) ? " RD" : "",
(mask & OHCI_INTR_SF) ? " SF" : "",
(mask & OHCI_INTR_WDH) ? " WDH" : "",
(mask & OHCI_INTR_SO) ? " SO" : "");
}
static void maybe_print_eds(char *label, __u32 value)
{
struct ed *edp = (struct ed *) value;
if (value) {
dbg("%s %08x", label, value);
dbg("%08x", edp->hwINFO);
dbg("%08x", edp->hwTailP);
dbg("%08x", edp->hwHeadP);
dbg("%08x", edp->hwNextED);
}
}
static char *hcfs2string(int state)
{
switch (state) {
case OHCI_USB_RESET:
return "reset";
case OHCI_USB_RESUME:
return "resume";
case OHCI_USB_OPER:
return "operational";
case OHCI_USB_SUSPEND:
return "suspend";
}
return "?";
}
/* dump control and status registers */
static void ohci_dump_status(struct ohci *controller)
{
struct ohci_regs *regs = controller->regs;
__u32 temp;
temp = readl(&regs->revision) & 0xff;
if (temp != 0x10)
dbg("spec %d.%d", (temp >> 4), (temp & 0x0f));
temp = readl(&regs->control);
dbg("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
(temp & OHCI_CTRL_RWE) ? " RWE" : "",
(temp & OHCI_CTRL_RWC) ? " RWC" : "",
(temp & OHCI_CTRL_IR) ? " IR" : "",
hcfs2string(temp & OHCI_CTRL_HCFS),
(temp & OHCI_CTRL_BLE) ? " BLE" : "",
(temp & OHCI_CTRL_CLE) ? " CLE" : "",
(temp & OHCI_CTRL_IE) ? " IE" : "",
(temp & OHCI_CTRL_PLE) ? " PLE" : "", temp & OHCI_CTRL_CBSR);
temp = readl(&regs->cmdstatus);
dbg("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
(temp & OHCI_SOC) >> 16,
(temp & OHCI_OCR) ? " OCR" : "",
(temp & OHCI_BLF) ? " BLF" : "",
(temp & OHCI_CLF) ? " CLF" : "", (temp & OHCI_HCR) ? " HCR" : "");
ohci_dump_intr_mask("intrstatus", readl(&regs->intrstatus));
ohci_dump_intr_mask("intrenable", readl(&regs->intrenable));
maybe_print_eds("ed_periodcurrent", readl(&regs->ed_periodcurrent));
maybe_print_eds("ed_controlhead", readl(&regs->ed_controlhead));
maybe_print_eds("ed_controlcurrent", readl(&regs->ed_controlcurrent));
maybe_print_eds("ed_bulkhead", readl(&regs->ed_bulkhead));
maybe_print_eds("ed_bulkcurrent", readl(&regs->ed_bulkcurrent));
maybe_print_eds("donehead", readl(&regs->donehead));
}
static void ohci_dump_roothub(struct ohci *controller, int verbose)
{
__u32 temp, ndp, i;
temp = roothub_a(controller);
ndp = (temp & RH_A_NDP);
if (verbose) {
dbg("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
((temp & RH_A_POTPGT) >> 24) & 0xff,
(temp & RH_A_NOCP) ? " NOCP" : "",
(temp & RH_A_OCPM) ? " OCPM" : "",
(temp & RH_A_DT) ? " DT" : "",
(temp & RH_A_NPS) ? " NPS" : "",
(temp & RH_A_PSM) ? " PSM" : "", ndp);
temp = roothub_b(controller);
dbg("roothub.b: %08x PPCM=%04x DR=%04x",
temp, (temp & RH_B_PPCM) >> 16, (temp & RH_B_DR)
);
temp = roothub_status(controller);
dbg("roothub.status: %08x%s%s%s%s%s%s",
temp,
(temp & RH_HS_CRWE) ? " CRWE" : "",
(temp & RH_HS_OCIC) ? " OCIC" : "",
(temp & RH_HS_LPSC) ? " LPSC" : "",
(temp & RH_HS_DRWE) ? " DRWE" : "",
(temp & RH_HS_OCI) ? " OCI" : "",
(temp & RH_HS_LPS) ? " LPS" : "");
}
for (i = 0; i < ndp; i++) {
temp = roothub_portstatus(controller, i);
dbg("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
i,
temp,
(temp & RH_PS_PRSC) ? " PRSC" : "",
(temp & RH_PS_OCIC) ? " OCIC" : "",
(temp & RH_PS_PSSC) ? " PSSC" : "",
(temp & RH_PS_PESC) ? " PESC" : "",
(temp & RH_PS_CSC) ? " CSC" : "",
(temp & RH_PS_LSDA) ? " LSDA" : "",
(temp & RH_PS_PPS) ? " PPS" : "",
(temp & RH_PS_PRS) ? " PRS" : "",
(temp & RH_PS_POCI) ? " POCI" : "",
(temp & RH_PS_PSS) ? " PSS" : "",
(temp & RH_PS_PES) ? " PES" : "",
(temp & RH_PS_CCS) ? " CCS" : "");
}
}
static void ohci_dump(struct ohci *controller, int verbose)
{
dbg("OHCI controller usb-%s state", controller->slot_name);
/* dumps some of the state we know about */
ohci_dump_status(controller);
if (verbose)
ep_print_int_eds(controller, "hcca");
dbg("hcca frame #%04x", controller->hcca->frame_no);
ohci_dump_roothub(controller, 1);
}
#endif /* DEBUG */
/*-------------------------------------------------------------------------*
* Interface functions (URB)
*-------------------------------------------------------------------------*/
/* get a transfer request */
int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, struct devrequest *setup, int interval)
{
struct ohci *ohci;
struct ed *ed;
struct urb_priv *purb_priv;
int i, size = 0;
ohci = &gohci;
/* when controller's hung, permit only roothub cleanup attempts
* such as powering down ports */
if (ohci->disabled) {
err("sohci_submit_job: EPIPE");
return -1;
}
/* if we have an unfinished URB from previous transaction let's
* fail and scream as quickly as possible so as not to corrupt
* further communication */
if (!urb_finished) {
err("sohci_submit_job: URB NOT FINISHED");
return -1;
}
/* we're about to begin a new transaction here
so mark the URB unfinished */
urb_finished = 0;
/* every endpoint has a ed, locate and fill it */
ed = ep_add_ed(dev, pipe);
if (!ed) {
err("sohci_submit_job: ENOMEM");
return -1;
}
/* for the private part of the URB we need the number of TDs (size) */
switch (usb_pipetype(pipe)) {
case PIPE_BULK:
/* one TD for every 4096 Byte */
size = (transfer_len - 1) / 4096 + 1;
break;
case PIPE_CONTROL:
/* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
size = (transfer_len == 0) ? 2 : (transfer_len - 1) / 4096 + 3;
break;
}
if (size >= (N_URB_TD - 1)) {
err("need %d TDs, only have %d", size, N_URB_TD);
return -1;
}
purb_priv = &urb_priv;
purb_priv->pipe = pipe;
/* fill the private part of the URB */
purb_priv->length = size;
purb_priv->ed = ed;
purb_priv->actual_length = 0;
/* allocate the TDs */
/* note that td[0] was allocated in ep_add_ed */
for (i = 0; i < size; i++) {
purb_priv->td[i] = td_alloc(dev);
if (!purb_priv->td[i]) {
purb_priv->length = i;
urb_free_priv(purb_priv);
err("sohci_submit_job: ENOMEM");
return -1;
}
}
if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
urb_free_priv(purb_priv);
err("sohci_submit_job: EINVAL");
return -1;
}
/* link the ed into a chain if is not already */
if (ed->state != ED_OPER)
ep_link(ohci, ed);
/* fill the TDs and link it to the ed */
td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv,
interval);
return 0;
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
/* tell us the current USB frame number */
static int sohci_get_current_frame_number(struct usb_device *usb_dev)
{
struct ohci *ohci = &gohci;
return m16_swap(ohci->hcca->frame_no);
}
#endif
/*-------------------------------------------------------------------------*
* ED handling functions
*-------------------------------------------------------------------------*/
/* link an ed into one of the HC chains */
static int ep_link(struct ohci *ohci, struct ed *edi)
{
struct ed *ed = edi;
ed->state = ED_OPER;
switch (ed->type) {
case PIPE_CONTROL:
ed->hwNextED = 0;
if (ohci->ed_controltail == NULL) {
writel((u32)ed, &ohci->regs->ed_controlhead);
} else {
ohci->ed_controltail->hwNextED = (__u32) m32_swap(ed);
}
ed->ed_prev = ohci->ed_controltail;
if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
!ohci->ed_rm_list[1] && !ohci->sleeping) {
ohci->hc_control |= OHCI_CTRL_CLE;
writel(ohci->hc_control, &ohci->regs->control);
}
ohci->ed_controltail = edi;
break;
case PIPE_BULK:
ed->hwNextED = 0;
if (ohci->ed_bulktail == NULL) {
writel((u32)ed, &ohci->regs->ed_bulkhead);
} else {
ohci->ed_bulktail->hwNextED = (__u32) m32_swap(ed);
}
ed->ed_prev = ohci->ed_bulktail;
if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
!ohci->ed_rm_list[1] && !ohci->sleeping) {
ohci->hc_control |= OHCI_CTRL_BLE;
writel(ohci->hc_control, &ohci->regs->control);
}
ohci->ed_bulktail = edi;
break;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* unlink an ed from one of the HC chains.
* just the link to the ed is unlinked.
* the link from the ed still points to another operational ed or 0
* so the HC can eventually finish the processing of the unlinked ed */
static int ep_unlink(struct ohci *ohci, struct ed *ed)
{
struct ed *next;
ed->hwINFO |= m32_swap(OHCI_ED_SKIP);
switch (ed->type) {
case PIPE_CONTROL:
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_CLE;
writel(ohci->hc_control, &ohci->regs->control);
}
writel(m32_swap(*((__u32 *) &ed->hwNextED)),
&ohci->regs->ed_controlhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
}
if (ohci->ed_controltail == ed) {
ohci->ed_controltail = ed->ed_prev;
} else {
next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
next->ed_prev = ed->ed_prev;
}
break;
case PIPE_BULK:
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_BLE;
writel(ohci->hc_control, &ohci->regs->control);
}
writel(m32_swap(*((__u32 *) &ed->hwNextED)),
&ohci->regs->ed_bulkhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
}
if (ohci->ed_bulktail == ed) {
ohci->ed_bulktail = ed->ed_prev;
} else {
next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
next->ed_prev = ed->ed_prev;
}
break;
}
ed->state = ED_UNLINK;
return 0;
}
/*-------------------------------------------------------------------------*/
/* add/reinit an endpoint; this should be done once at the usb_set_configuration
* command, but the USB stack is a little bit stateless so we do it at every
* transaction. If the state of the ed is ED_NEW then a dummy td is added and
* the state is changed to ED_UNLINK. In all other cases the state is left
* unchanged. The ed info fields are setted anyway even though most of them
* should not change */
static struct ed *ep_add_ed(struct usb_device *usb_dev, unsigned long pipe)
{
struct td *td;
struct ed *ed_ret;
struct ed *ed;
ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint(pipe) << 1) |
(usb_pipecontrol(pipe) ? 0 :
usb_pipeout(pipe))];
if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
err("ep_add_ed: pending delete");
/* pending delete request */
return NULL;
}
if (ed->state == ED_NEW) {
ed->hwINFO = m32_swap(OHCI_ED_SKIP); /* skip ed */
/* dummy td; end of td list for ed */
td = td_alloc(usb_dev);
ed->hwTailP = (__u32) m32_swap(td);
ed->hwHeadP = ed->hwTailP;
ed->state = ED_UNLINK;
ed->type = usb_pipetype(pipe);
ohci_dev.ed_cnt++;
}
ed->hwINFO = m32_swap(usb_pipedevice(pipe)
| usb_pipeendpoint(pipe) << 7
| (usb_pipeisoc(pipe) ? 0x8000 : 0)
| (usb_pipecontrol(pipe) ? 0 :
(usb_pipeout(pipe) ? 0x800 : 0x1000))
| usb_pipeslow(pipe) << 13 |
usb_maxpacket(usb_dev, pipe) << 16);
return ed_ret;
}
/*-------------------------------------------------------------------------*
* TD handling functions
*-------------------------------------------------------------------------*/
/* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
static void td_fill(struct ohci *ohci, unsigned int info, void *data, int len,
struct usb_device *dev, int index,
struct urb_priv *urb_priv)
{
struct td *td, *td_pt;
#ifdef OHCI_FILL_TRACE
int i;
#endif
if (index > urb_priv->length) {
err("index > length");
return;
}
/* use this td as the next dummy */
td_pt = urb_priv->td[index];
td_pt->hwNextTD = 0;
/* fill the old dummy TD */
td = urb_priv->td[index] =
(struct td *) (m32_swap(urb_priv->ed->hwTailP) & ~0xf);
td->ed = urb_priv->ed;
td->next_dl_td = NULL;
td->index = index;
td->data = (__u32) data;
#ifdef OHCI_FILL_TRACE
if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
for (i = 0; i < len; i++)
printf("td->data[%d] %#2x ", i,
((unsigned char *)td->data)[i]);
printf("\n");
}
#endif
if (!len)
data = 0;
td->hwINFO = (__u32) m32_swap(info);
td->hwCBP = (__u32) m32_swap(data);
if (data)
td->hwBE = (__u32) m32_swap(data + len - 1);
else
td->hwBE = 0;
td->hwNextTD = (__u32) m32_swap(td_pt);
/* append to queue */
td->ed->hwTailP = td->hwNextTD;
}
/*-------------------------------------------------------------------------*/
/* prepare all TDs of a transfer */
static void td_submit_job(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len,
struct devrequest *setup, struct urb_priv *urb,
int interval)
{
struct ohci *ohci = &gohci;
int data_len = transfer_len;
void *data;
int cnt = 0;
__u32 info = 0;
unsigned int toggle = 0;
/* OHCI handles the DATA-toggles itself, we just
use the USB-toggle bits for reseting */
if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
toggle = TD_T_TOGGLE;
} else {
toggle = TD_T_DATA0;
usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe),
1);
}
urb->td_cnt = 0;
if (data_len)
data = buffer;
else
data = 0;
switch (usb_pipetype(pipe)) {
case PIPE_BULK:
info = usb_pipeout(pipe) ? TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN;
while (data_len > 4096) {
td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
4096, dev, cnt, urb);
data += 4096;
data_len -= 4096;
cnt++;
}
info = usb_pipeout(pipe) ?
TD_CC | TD_DP_OUT :
TD_CC | TD_R | TD_DP_IN;
td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
data_len, dev, cnt, urb);
cnt++;
if (!ohci->sleeping)
/* start bulk list */
writel(OHCI_BLF, &ohci->regs->cmdstatus);
break;
case PIPE_CONTROL:
info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
td_fill(ohci, info, setup, 8, dev, cnt++, urb);
if (data_len > 0) {
info = usb_pipeout(pipe) ?
TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 :
TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
/* NOTE: mishandles transfers >8K, some >4K */
td_fill(ohci, info, data, data_len, dev, cnt++, urb);
}
info = usb_pipeout(pipe) ?
TD_CC | TD_DP_IN | TD_T_DATA1 :
TD_CC | TD_DP_OUT | TD_T_DATA1;
td_fill(ohci, info, data, 0, dev, cnt++, urb);
if (!ohci->sleeping)
/* start Control list */
writel(OHCI_CLF, &ohci->regs->cmdstatus);
break;
}
if (urb->length != cnt)
dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
}
/*-------------------------------------------------------------------------*
* Done List handling functions
*-------------------------------------------------------------------------*/
/* calculate the transfer length and update the urb */
static void dl_transfer_length(struct td *td)
{
__u32 tdBE, tdCBP;
struct urb_priv *lurb_priv = &urb_priv;
tdBE = m32_swap(td->hwBE);
tdCBP = m32_swap(td->hwCBP);
if (!(usb_pipecontrol(lurb_priv->pipe) &&
((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
if (tdBE != 0) {
if (td->hwCBP == 0)
lurb_priv->actual_length += tdBE - td->data + 1;
else
lurb_priv->actual_length += tdCBP - td->data;
}
}
}
/*-------------------------------------------------------------------------*/
/* replies to the request have to be on a FIFO basis so
* we reverse the reversed done-list */
static struct td *dl_reverse_done_list(struct ohci *ohci)
{
__u32 td_list_hc;
__u32 tmp;
struct td *td_rev = NULL;
struct td *td_list = NULL;
struct urb_priv *lurb_priv = NULL;
td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
ohci->hcca->done_head = 0;
while (td_list_hc) {
td_list = (struct td *) td_list_hc;
if (TD_CC_GET(m32_swap(td_list->hwINFO))) {
lurb_priv = &urb_priv;
dbg(" USB-error/status: %x : %p",
TD_CC_GET(m32_swap(td_list->hwINFO)), td_list);
if (td_list->ed->hwHeadP & m32_swap(0x1)) {
if (lurb_priv &&
((td_list->index+1) < lurb_priv->length)) {
tmp = lurb_priv->length - 1;
td_list->ed->hwHeadP =
(lurb_priv->td[tmp]->hwNextTD &
m32_swap(0xfffffff0)) |
(td_list->ed->hwHeadP &
m32_swap(0x2));
lurb_priv->td_cnt += lurb_priv->length -
td_list->index - 1;
} else
td_list->ed->hwHeadP &=
m32_swap(0xfffffff2);
}
}
td_list->next_dl_td = td_rev;
td_rev = td_list;
td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
}
return td_list;
}
/*-------------------------------------------------------------------------*/
/* td done list */
static int dl_done_list(struct ohci *ohci, struct td *td_list)
{
struct td *td_list_next = NULL;
struct ed *ed;
int cc = 0;
int stat = 0;
/* urb_t *urb; */
struct urb_priv *lurb_priv;
__u32 tdINFO, edHeadP, edTailP;
while (td_list) {
td_list_next = td_list->next_dl_td;
lurb_priv = &urb_priv;
tdINFO = m32_swap(td_list->hwINFO);
ed = td_list->ed;
dl_transfer_length(td_list);
/* error code of transfer */
cc = TD_CC_GET(tdINFO);
if (cc != 0) {
dbg("ConditionCode %#x", cc);
stat = cc_to_error[cc];
}
/* see if this done list makes for all TD's of current URB,
* and mark the URB finished if so */
if (++(lurb_priv->td_cnt) == lurb_priv->length) {
if ((ed->state & (ED_OPER | ED_UNLINK)))
urb_finished = 1;
else
dbg("dl_done_list: strange.., ED state %x, "
"ed->state\n");
} else
dbg("dl_done_list: processing TD %x, len %x\n",
lurb_priv->td_cnt, lurb_priv->length);
if (ed->state != ED_NEW) {
edHeadP = m32_swap(ed->hwHeadP) & 0xfffffff0;
edTailP = m32_swap(ed->hwTailP);
/* unlink eds if they are not busy */
if ((edHeadP == edTailP) && (ed->state == ED_OPER))
ep_unlink(ohci, ed);
}
td_list = td_list_next;
}
return stat;
}
/*-------------------------------------------------------------------------*
* Virtual Root Hub
*-------------------------------------------------------------------------*/
/* Device descriptor */
static __u8 root_hub_dev_des[] = {
0x12, /* __u8 bLength; */
0x01, /* __u8 bDescriptorType; Device */
0x10, /* __u16 bcdUSB; v1.1 */
0x01,
0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
0x00, /* __u8 bDeviceSubClass; */
0x00, /* __u8 bDeviceProtocol; */
0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
0x00, /* __u16 idVendor; */
0x00,
0x00, /* __u16 idProduct; */
0x00,
0x00, /* __u16 bcdDevice; */
0x00,
0x00, /* __u8 iManufacturer; */
0x01, /* __u8 iProduct; */
0x00, /* __u8 iSerialNumber; */
0x01 /* __u8 bNumConfigurations; */
};
/* Configuration descriptor */
static __u8 root_hub_config_des[] = {
0x09, /* __u8 bLength; */
0x02, /* __u8 bDescriptorType; Configuration */
0x19, /* __u16 wTotalLength; */
0x00,
0x01, /* __u8 bNumInterfaces; */
0x01, /* __u8 bConfigurationValue; */
0x00, /* __u8 iConfiguration; */
0x40, /* __u8 bmAttributes;
Bit 7: Bus-powered, 6: Self-powered,
5 Remote-wakwup, 4..0: resvd */
0x00, /* __u8 MaxPower; */
/* interface */
0x09, /* __u8 if_bLength; */
0x04, /* __u8 if_bDescriptorType; Interface */
0x00, /* __u8 if_bInterfaceNumber; */
0x00, /* __u8 if_bAlternateSetting; */
0x01, /* __u8 if_bNumEndpoints; */
0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
0x00, /* __u8 if_bInterfaceSubClass; */
0x00, /* __u8 if_bInterfaceProtocol; */
0x00, /* __u8 if_iInterface; */
/* endpoint */
0x07, /* __u8 ep_bLength; */
0x05, /* __u8 ep_bDescriptorType; Endpoint */
0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
0x03, /* __u8 ep_bmAttributes; Interrupt */
0x02, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
0x00,
0xff /* __u8 ep_bInterval; 255 ms */
};
static unsigned char root_hub_str_index0[] = {
0x04, /* __u8 bLength; */
0x03, /* __u8 bDescriptorType; String-descriptor */
0x09, /* __u8 lang ID */
0x04, /* __u8 lang ID */
};
static unsigned char root_hub_str_index1[] = {
28, /* __u8 bLength; */
0x03, /* __u8 bDescriptorType; String-descriptor */
'O', /* __u8 Unicode */
0, /* __u8 Unicode */
'H', /* __u8 Unicode */
0, /* __u8 Unicode */
'C', /* __u8 Unicode */
0, /* __u8 Unicode */
'I', /* __u8 Unicode */
0, /* __u8 Unicode */
' ', /* __u8 Unicode */
0, /* __u8 Unicode */
'R', /* __u8 Unicode */
0, /* __u8 Unicode */
'o', /* __u8 Unicode */
0, /* __u8 Unicode */
'o', /* __u8 Unicode */
0, /* __u8 Unicode */
't', /* __u8 Unicode */
0, /* __u8 Unicode */
' ', /* __u8 Unicode */
0, /* __u8 Unicode */
'H', /* __u8 Unicode */
0, /* __u8 Unicode */
'u', /* __u8 Unicode */
0, /* __u8 Unicode */
'b', /* __u8 Unicode */
0, /* __u8 Unicode */
};
/* Hub class-specific descriptor is constructed dynamically */
/*-------------------------------------------------------------------------*/
#define OK(x) len = (x); break
#ifdef DEBUG
#define WR_RH_STAT(x) \
{ \
info("WR:status %#8x", (x)); \
writel((x), &gohci.regs->roothub.status); \
}
#define WR_RH_PORTSTAT(x) \
{ \
info("WR:portstatus[%d] %#8x", wIndex-1, (x)); \
writel((x), &gohci.regs->roothub.portstatus[wIndex-1]); \
}
#else
#define WR_RH_STAT(x) \
writel((x), &gohci.regs->roothub.status)
#define WR_RH_PORTSTAT(x)\
writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
#endif
#define RD_RH_STAT roothub_status(&gohci)
#define RD_RH_PORTSTAT roothub_portstatus(&gohci, wIndex-1)
/* request to virtual root hub */
int rh_check_port_status(struct ohci *controller)
{
__u32 temp, ndp, i;
int res;
res = -1;
temp = roothub_a(controller);
ndp = (temp & RH_A_NDP);
for (i = 0; i < ndp; i++) {
temp = roothub_portstatus(controller, i);
/* check for a device disconnect */
if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
(RH_PS_PESC | RH_PS_CSC)) && ((temp & RH_PS_CCS) == 0)) {
res = i;
break;
}
}
return res;
}
static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len,
struct devrequest *cmd)
{
void *data = buffer;
int leni = transfer_len;
int len = 0;
int stat = 0;
union {
__u32 word[4];
__u16 hword[8];
__u8 byte[16];
} datab;
__u8 *data_buf = datab.byte;
__u16 bmRType_bReq;
__u16 wValue;
__u16 wIndex;
__u16 wLength;
#ifdef DEBUG
urb_priv.actual_length = 0;
pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)",
usb_pipein(pipe));
#else
wait_ms(1);
#endif
if (usb_pipeint(pipe)) {
info("Root-Hub submit IRQ: NOT implemented");
return 0;
}
bmRType_bReq = cmd->requesttype | (cmd->request << 8);
wValue = m16_swap(cmd->value);
wIndex = m16_swap(cmd->index);
wLength = m16_swap(cmd->length);
info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
switch (bmRType_bReq) {
/* Request Destination:
without flags: Device,
RH_INTERFACE: interface,
RH_ENDPOINT: endpoint,
RH_CLASS means HUB here,
RH_OTHER | RH_CLASS almost ever means HUB_PORT here
*/
case RH_GET_STATUS:
datab.hword[0] = m16_swap(1);
OK(2);
case RH_GET_STATUS | RH_INTERFACE:
datab.hword[0] = m16_swap(0);
OK(2);
case RH_GET_STATUS | RH_ENDPOINT:
datab.hword[0] = m16_swap(0);
OK(2);
case RH_GET_STATUS | RH_CLASS:
datab.word[0] =
m32_swap(RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
OK(4);
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
datab.word[0] = m32_swap(RD_RH_PORTSTAT);
OK(4);
case RH_CLEAR_FEATURE | RH_ENDPOINT:
switch (wValue) {
case (RH_ENDPOINT_STALL):
OK(0);
}
break;
case RH_CLEAR_FEATURE | RH_CLASS:
switch (wValue) {
case RH_C_HUB_LOCAL_POWER:
OK(0);
case (RH_C_HUB_OVER_CURRENT):
WR_RH_STAT(RH_HS_OCIC);
OK(0);
}
break;
case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_ENABLE):
WR_RH_PORTSTAT(RH_PS_CCS);
OK(0);
case (RH_PORT_SUSPEND):
WR_RH_PORTSTAT(RH_PS_POCI);
OK(0);
case (RH_PORT_POWER):
WR_RH_PORTSTAT(RH_PS_LSDA);
OK(0);
case (RH_C_PORT_CONNECTION):
WR_RH_PORTSTAT(RH_PS_CSC);
OK(0);
case (RH_C_PORT_ENABLE):
WR_RH_PORTSTAT(RH_PS_PESC);
OK(0);
case (RH_C_PORT_SUSPEND):
WR_RH_PORTSTAT(RH_PS_PSSC);
OK(0);
case (RH_C_PORT_OVER_CURRENT):
WR_RH_PORTSTAT(RH_PS_OCIC);
OK(0);
case (RH_C_PORT_RESET):
WR_RH_PORTSTAT(RH_PS_PRSC);
OK(0);
}
break;
case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_SUSPEND):
WR_RH_PORTSTAT(RH_PS_PSS);
OK(0);
case (RH_PORT_RESET): /* BUG IN HUP CODE ******** */
if (RD_RH_PORTSTAT & RH_PS_CCS)
WR_RH_PORTSTAT(RH_PS_PRS);
OK(0);
case (RH_PORT_POWER):
WR_RH_PORTSTAT(RH_PS_PPS);
OK(0);
case (RH_PORT_ENABLE): /* BUG IN HUP CODE ******** */
if (RD_RH_PORTSTAT & RH_PS_CCS)
WR_RH_PORTSTAT(RH_PS_PES);
OK(0);
}
break;
case RH_SET_ADDRESS:
gohci.rh.devnum = wValue;
OK(0);
case RH_GET_DESCRIPTOR:
switch ((wValue & 0xff00) >> 8) {
case (0x01): /* device descriptor */
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_dev_des), wLength));
data_buf = root_hub_dev_des;
OK(len);
case (0x02): /* configuration descriptor */
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_config_des),
wLength));
data_buf = root_hub_config_des;
OK(len);
case (0x03): /* string descriptors */
if (wValue == 0x0300) {
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_str_index0),
wLength));
data_buf = root_hub_str_index0;
OK(len);
}
if (wValue == 0x0301) {
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_str_index1),
wLength));
data_buf = root_hub_str_index1;
OK(len);
}
default:
stat = USB_ST_STALLED;
}
break;
case RH_GET_DESCRIPTOR | RH_CLASS:
{
__u32 temp = roothub_a(&gohci);
data_buf[0] = 9; /* min length; */
data_buf[1] = 0x29;
data_buf[2] = temp & RH_A_NDP;
data_buf[3] = 0;
if (temp & RH_A_PSM)
/* per-port power switching? */
data_buf[3] |= 0x1;
if (temp & RH_A_NOCP)
/* no overcurrent reporting? */
data_buf[3] |= 0x10;
else if (temp & RH_A_OCPM)
/* per-port overcurrent reporting? */
data_buf[3] |= 0x8;
/* corresponds to data_buf[4-7] */
datab.word[1] = 0;
data_buf[5] = (temp & RH_A_POTPGT) >> 24;
temp = roothub_b(&gohci);
data_buf[7] = temp & RH_B_DR;
if (data_buf[2] < 7) {
data_buf[8] = 0xff;
} else {
data_buf[0] += 2;
data_buf[8] = (temp & RH_B_DR) >> 8;
data_buf[10] = data_buf[9] = 0xff;
}
len = min_t(unsigned int, leni,
min_t(unsigned int, data_buf[0], wLength));
OK(len);
}
case RH_GET_CONFIGURATION:
*(__u8 *) data_buf = 0x01;
OK(1);
case RH_SET_CONFIGURATION:
WR_RH_STAT(0x10000);
OK(0);
default:
dbg("unsupported root hub command");
stat = USB_ST_STALLED;
}
#ifdef DEBUG
ohci_dump_roothub(&gohci, 1);
#else
wait_ms(1);
#endif
len = min_t(int, len, leni);
if (data != data_buf)
memcpy(data, data_buf, len);
dev->act_len = len;
dev->status = stat;
#ifdef DEBUG
if (transfer_len)
urb_priv.actual_length = transfer_len;
pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)",
0 /*usb_pipein(pipe) */);
#else
wait_ms(1);
#endif
return stat;
}
/*-------------------------------------------------------------------------*/
/* common code for handling submit messages - used for all but root hub */
/* accesses. */
int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, struct devrequest *setup, int interval)
{
int stat = 0;
int maxsize = usb_maxpacket(dev, pipe);
int timeout;
/* device pulled? Shortcut the action. */
if (devgone == dev) {
dev->status = USB_ST_CRC_ERR;
return 0;
}
#ifdef DEBUG
urb_priv.actual_length = 0;
pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
usb_pipein(pipe));
#else
wait_ms(1);
#endif
if (!maxsize) {
err("submit_common_message: pipesize for pipe %lx is zero",
pipe);
return -1;
}
if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) <
0) {
err("sohci_submit_job failed");
return -1;
}
wait_ms(10);
/* ohci_dump_status(&gohci); */
/* allow more time for a BULK device to react - some are slow */
#define BULK_TO 5000 /* timeout in milliseconds */
if (usb_pipebulk(pipe))
timeout = BULK_TO;
else
timeout = 100;
/* wait for it to complete */
for (;;) {
/* check whether the controller is done */
stat = hc_interrupt();
if (stat < 0) {
stat = USB_ST_CRC_ERR;
break;
}
/* NOTE: since we are not interrupt driven in U-Boot and always
* handle only one URB at a time, we cannot assume the
* transaction finished on the first successful return from
* hc_interrupt().. unless the flag for current URB is set,
* meaning that all TD's to/from device got actually
* transferred and processed. If the current URB is not
* finished we need to re-iterate this loop so as
* hc_interrupt() gets called again as there needs to be some
* more TD's to process still */
if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
/* 0xff is returned for an SF-interrupt */
break;
}
if (--timeout) {
wait_ms(1);
if (!urb_finished)
dbg("\%");
} else {
err("CTL:TIMEOUT ");
dbg("submit_common_msg: TO status %x\n", stat);
stat = USB_ST_CRC_ERR;
urb_finished = 1;
break;
}
}
#if 0
/* we got an Root Hub Status Change interrupt */
if (got_rhsc) {
#ifdef DEBUG
ohci_dump_roothub(&gohci, 1);
#endif
got_rhsc = 0;
/* abuse timeout */
timeout = rh_check_port_status(&gohci);
if (timeout >= 0) {
#if 0 /* this does nothing useful, but leave it here
in case that changes */
/* the called routine adds 1 to the passed value */
usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
#endif
/*
* XXX
* This is potentially dangerous because it assumes
* that only one device is ever plugged in!
*/
devgone = dev;
}
}
#endif
dev->status = stat;
dev->act_len = transfer_len;
#ifdef DEBUG
pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)",
usb_pipein(pipe));
#else
wait_ms(1);
#endif
/* free TDs in urb_priv */
urb_free_priv(&urb_priv);
return 0;
}
/* submit routines called from usb.c */
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len)
{
info("submit_bulk_msg");
return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
}
int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, struct devrequest *setup)
{
int maxsize = usb_maxpacket(dev, pipe);
info("submit_control_msg");
#ifdef DEBUG
urb_priv.actual_length = 0;
pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
usb_pipein(pipe));
#else
wait_ms(1);
#endif
if (!maxsize) {
err("submit_control_message: pipesize for pipe %lx is zero",
pipe);
return -1;
}
if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
gohci.rh.dev = dev;
/* root hub - redirect */
return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
setup);
}
return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
}
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, int interval)
{
info("submit_int_msg");
return -1;
}
/*-------------------------------------------------------------------------*
* HC functions
*-------------------------------------------------------------------------*/
/* reset the HC and BUS */
static int hc_reset(struct ohci *ohci)
{
int timeout = 30;
int smm_timeout = 50; /* 0,5 sec */
if (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
/* SMM owns the HC - request ownership */
writel(OHCI_OCR, &ohci->regs->cmdstatus);
info("USB HC TakeOver from SMM");
while (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
wait_ms(10);
if (--smm_timeout == 0) {
err("USB HC TakeOver failed!");
return -1;
}
}
}
/* Disable HC interrupts */
writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
ohci->slot_name, readl(&ohci->regs->control));
/* Reset USB (needed by some controllers) */
writel(0, &ohci->regs->control);
/* HC Reset requires max 10 us delay */
writel(OHCI_HCR, &ohci->regs->cmdstatus);
while ((readl(&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
if (--timeout == 0) {
err("USB HC reset timed out!");
return -1;
}
udelay(1);
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* Start an OHCI controller, set the BUS operational
* enable interrupts
* connect the virtual root hub */
static int hc_start(struct ohci *ohci)
{
__u32 mask;
unsigned int fminterval;
ohci->disabled = 1;
/* Tell the controller where the control and bulk lists are
* The lists are empty now. */
writel(0, &ohci->regs->ed_controlhead);
writel(0, &ohci->regs->ed_bulkhead);
/* a reset clears this */
writel((__u32) ohci->hcca, &ohci->regs->hcca);
fminterval = 0x2edf;
writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
writel(fminterval, &ohci->regs->fminterval);
writel(0x628, &ohci->regs->lsthresh);
/* start controller operations */
ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
ohci->disabled = 0;
writel(ohci->hc_control, &ohci->regs->control);
/* disable all interrupts */
mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
OHCI_INTR_OC | OHCI_INTR_MIE);
writel(mask, &ohci->regs->intrdisable);
/* clear all interrupts */
mask &= ~OHCI_INTR_MIE;
writel(mask, &ohci->regs->intrstatus);
/* Choose the interrupts we care about now - but w/o MIE */
mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
writel(mask, &ohci->regs->intrenable);
#ifdef OHCI_USE_NPS
/* required for AMD-756 and some Mac platforms */
writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
&ohci->regs->roothub.a);
writel(RH_HS_LPSC, &ohci->regs->roothub.status);
#endif /* OHCI_USE_NPS */
/* POTPGT delay is bits 24-31, in 2 ms units. */
mdelay((roothub_a(ohci) >> 23) & 0x1fe);
/* connect the virtual root hub */
ohci->rh.devnum = 0;
return 0;
}
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
static int hc_interrupt(void)
{
struct ohci *ohci = &gohci;
struct ohci_regs *regs = ohci->regs;
int ints;
int stat = -1;
if ((ohci->hcca->done_head != 0) &&
!(m32_swap(ohci->hcca->done_head) & 0x01)) {
ints = OHCI_INTR_WDH;
} else {
ints = readl(&regs->intrstatus);
if (ints == ~(u32) 0) {
ohci->disabled++;
err("%s device removed!", ohci->slot_name);
return -1;
}
ints &= readl(&regs->intrenable);
if (ints == 0) {
dbg("hc_interrupt: returning..\n");
return 0xff;
}
}
/* dbg("Interrupt: %x frame: %x", ints,
le16_to_cpu(ohci->hcca->frame_no)); */
if (ints & OHCI_INTR_RHSC) {
got_rhsc = 1;
stat = 0xff;
}
if (ints & OHCI_INTR_UE) {
ohci->disabled++;
err("OHCI Unrecoverable Error, controller usb-%s disabled",
ohci->slot_name);
/* e.g. due to PCI Master/Target Abort */
#ifdef DEBUG
ohci_dump(ohci, 1);
#else
wait_ms(1);
#endif
/* FIXME: be optimistic, hope that bug won't repeat often. */
/* Make some non-interrupt context restart the controller. */
/* Count and limit the retries though; either hardware or */
/* software errors can go forever... */
hc_reset(ohci);
return -1;
}
if (ints & OHCI_INTR_WDH) {
wait_ms(1);
writel(OHCI_INTR_WDH, &regs->intrdisable);
stat = dl_done_list(&gohci, dl_reverse_done_list(&gohci));
writel(OHCI_INTR_WDH, &regs->intrenable);
}
if (ints & OHCI_INTR_SO) {
dbg("USB Schedule overrun\n");
writel(OHCI_INTR_SO, &regs->intrenable);
stat = -1;
}
/* FIXME: this assumes SOF (1/ms) interrupts don't get lost... */
if (ints & OHCI_INTR_SF) {
unsigned int frame = m16_swap(ohci->hcca->frame_no) & 1;
wait_ms(1);
writel(OHCI_INTR_SF, &regs->intrdisable);
if (ohci->ed_rm_list[frame] != NULL)
writel(OHCI_INTR_SF, &regs->intrenable);
stat = 0xff;
}
writel(ints, &regs->intrstatus);
return stat;
}
/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/* De-allocate all resources.. */
static void hc_release_ohci(struct ohci *ohci)
{
dbg("USB HC release ohci usb-%s", ohci->slot_name);
if (!ohci->disabled)
hc_reset(ohci);
}
/*-------------------------------------------------------------------------*/
/*
* low level initalisation routine, called from usb.c
*/
static char ohci_inited = 0;
int usb_lowlevel_init(void)
{
struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
struct s3c24x0_gpio *gpio = s3c24x0_get_base_gpio();
/*
* Set the 48 MHz UPLL clocking. Values are taken from
* "PLL value selection guide", 6-23, s3c2400_UM.pdf.
*/
clk_power->upllcon = ((40 << 12) + (1 << 4) + 2);
gpio->misccr |= 0x8; /* 1 = use pads related USB for USB host */
/*
* Enable USB host clock.
*/
clk_power->clkcon |= (1 << 4);
memset(&gohci, 0, sizeof(struct ohci));
memset(&urb_priv, 0, sizeof(struct urb_priv));
/* align the storage */
if ((__u32) &ghcca[0] & 0xff) {
err("HCCA not aligned!!");
return -1;
}
phcca = &ghcca[0];
info("aligned ghcca %p", phcca);
memset(&ohci_dev, 0, sizeof(struct ohci_device));
if ((__u32) &ohci_dev.ed[0] & 0x7) {
err("EDs not aligned!!");
return -1;
}
memset(gtd, 0, sizeof(struct td) * (NUM_TD + 1));
if ((__u32) gtd & 0x7) {
err("TDs not aligned!!");
return -1;
}
ptd = gtd;
gohci.hcca = phcca;
memset(phcca, 0, sizeof(struct ohci_hcca));
gohci.disabled = 1;
gohci.sleeping = 0;
gohci.irq = -1;
gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
gohci.flags = 0;
gohci.slot_name = "s3c2400";
if (hc_reset(&gohci) < 0) {
hc_release_ohci(&gohci);
/* Initialization failed */
clk_power->clkcon &= ~(1 << 4);
return -1;
}
/* FIXME this is a second HC reset; why?? */
gohci.hc_control = OHCI_USB_RESET;
writel(gohci.hc_control, &gohci.regs->control);
wait_ms(10);
if (hc_start(&gohci) < 0) {
err("can't start usb-%s", gohci.slot_name);
hc_release_ohci(&gohci);
/* Initialization failed */
clk_power->clkcon &= ~(1 << 4);
return -1;
}
#ifdef DEBUG
ohci_dump(&gohci, 1);
#else
wait_ms(1);
#endif
ohci_inited = 1;
urb_finished = 1;
return 0;
}
int usb_lowlevel_stop(void)
{
struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
/* this gets called really early - before the controller has */
/* even been initialized! */
if (!ohci_inited)
return 0;
/* TODO release any interrupts, etc. */
/* call hc_release_ohci() here ? */
hc_reset(&gohci);
/* may not want to do this */
clk_power->clkcon &= ~(1 << 4);
return 0;
}
#endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0) */
Reference in a new issue View git blame Copy permalink