Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-17 18:28:55 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/arch/powerpc/cpu/ppc4xx/usb_ohci.c
Ilya Yanok c60795f41d usb: use linux/usb/ch9.h instead of usbdescriptors.h 
Linux usb/ch9.h seems to have all the same information (and more)
as usbdescriptors.h so use the former instead of the later one.

As a consequense of this change USB_SPEED_* values don't correspond
directly to EHCI speed encoding anymore, I've added necessary
recoding in EHCI driver. Also there is no point to put speed into
pipe anymore so it's removed and a bunch of host drivers fixed to
look at usb_device->speed instead.

Old usbdescriptors.h included is not removed as it seems to be
used by old USB device code.

This makes usb.h and usbdevice.h incompatible. Fortunately the
only place that tries to include both are the old MUSB code and
it needs usb.h only for USB_DMA_MINALIGN used in aligned attribute
on musb_regs structure but this attribute seems to be unneeded
(old MUSB code doesn't support any DMA at all).

Signed-off-by: Ilya Yanok <ilya.yanok@cogentembedded.com>
2012-11-20 00:16:06 +01:00

1639 lines
44 KiB
C
Raw Blame History

/*
* URB OHCI HCD (Host Controller Driver) for USB on the PPC440EP.
*
* (C) Copyright 2003-2004
* Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
*
* (C) Copyright 2004
* Pierre Aubert, Staubli Faverges <p.aubert@staubli.com>
*
* 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>
#ifdef CONFIG_USB_OHCI
#include <malloc.h>
#include <usb.h>
#include "usb_ohci.h"
#define OHCI_USE_NPS /* force NoPowerSwitching mode */
#undef OHCI_VERBOSE_DEBUG /* not always helpful */
#undef DEBUG
#undef SHOW_INFO
#undef OHCI_FILL_TRACE
/* For initializing controller (mask in an HCFS mode too) */
#define OHCI_CONTROL_INIT \
(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
#define readl(a) (*((volatile u32 *)(a)))
#define writel(a, b) (*((volatile u32 *)(b)) = ((volatile u32)a))
#define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
#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)
#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)
#if defined(CONFIG_405EZ) || defined(CONFIG_440EP) || defined(CONFIG_440EPX)
#define ohci_cpu_to_le16(x) (x)
#define ohci_cpu_to_le32(x) (x)
#else
#define ohci_cpu_to_le16(x) swap_16(x)
#define ohci_cpu_to_le32(x) swap_32(x)
#endif
/* global ohci_t */
static ohci_t 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 */
urb_priv_t 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, urb_priv_t * urb, int interval);
/*-------------------------------------------------------------------------*
* URB support functions
*-------------------------------------------------------------------------*/
/* free HCD-private data associated with this URB */
static void urb_free_priv (urb_priv_t * 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)
{
urb_priv_t * 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 (ohci_t *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--) {
ed_t *ed = (ed_t *)ohci_cpu_to_le32(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)
{
ed_t *edp = (ed_t *)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 (ohci_t *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 (ohci_t *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 (ohci_t *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)
{
ohci_t *ohci;
ed_t * ed;
urb_priv_t *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 */
if (!(ed = ep_add_ed (dev, pipe))) {
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)
{
ohci_t *ohci = &gohci;
return ohci_cpu_to_le16 (ohci->hcca->frame_no);
}
#endif
/*-------------------------------------------------------------------------*
* ED handling functions
*-------------------------------------------------------------------------*/
/* link an ed into one of the HC chains */
static int ep_link (ohci_t *ohci, ed_t *edi)
{
volatile ed_t *ed = edi;
ed->state = ED_OPER;
switch (ed->type) {
case PIPE_CONTROL:
ed->hwNextED = 0;
if (ohci->ed_controltail == NULL) {
writel (ed, &ohci->regs->ed_controlhead);
} else {
ohci->ed_controltail->hwNextED = ohci_cpu_to_le32 ((unsigned long)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 (ed, &ohci->regs->ed_bulkhead);
} else {
ohci->ed_bulktail->hwNextED = ohci_cpu_to_le32 ((unsigned long)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 (ohci_t *ohci, ed_t *edi)
{
volatile ed_t *ed = edi;
ed->hwINFO |= ohci_cpu_to_le32 (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 (ohci_cpu_to_le32 (*((__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 {
((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->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 (ohci_cpu_to_le32 (*((__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 {
((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->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 ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
{
td_t *td;
ed_t *ed_ret;
volatile ed_t *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 = ohci_cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
/* dummy td; end of td list for ed */
td = td_alloc (usb_dev);
ed->hwTailP = ohci_cpu_to_le32 ((unsigned long)td);
ed->hwHeadP = ed->hwTailP;
ed->state = ED_UNLINK;
ed->type = usb_pipetype (pipe);
ohci_dev.ed_cnt++;
}
ed->hwINFO = ohci_cpu_to_le32 (usb_pipedevice (pipe)
| usb_pipeendpoint (pipe) << 7
| (usb_pipeisoc (pipe)? 0x8000: 0)
| (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
| (usb_dev->speed == USB_SPEED_LOW) << 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 (ohci_t *ohci, unsigned int info,
void *data, int len,
struct usb_device *dev, int index, urb_priv_t *urb_priv)
{
volatile td_t *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] = (td_t *)(ohci_cpu_to_le32 (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 = ohci_cpu_to_le32 (info);
td->hwCBP = ohci_cpu_to_le32 ((unsigned long)data);
if (data)
td->hwBE = ohci_cpu_to_le32 ((unsigned long)(data + len - 1));
else
td->hwBE = 0;
td->hwNextTD = ohci_cpu_to_le32 ((unsigned long)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, urb_priv_t *urb, int interval)
{
ohci_t *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)
writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
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)
writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
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(td_t * td)
{
__u32 tdBE, tdCBP;
urb_priv_t *lurb_priv = &urb_priv;
tdBE = ohci_cpu_to_le32 (td->hwBE);
tdCBP = ohci_cpu_to_le32 (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 td_t * dl_reverse_done_list (ohci_t *ohci)
{
__u32 td_list_hc;
td_t *td_rev = NULL;
td_t *td_list = NULL;
urb_priv_t *lurb_priv = NULL;
td_list_hc = ohci_cpu_to_le32 (ohci->hcca->done_head) & 0xfffffff0;
ohci->hcca->done_head = 0;
while (td_list_hc) {
td_list = (td_t *)td_list_hc;
if (TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO))) {
lurb_priv = &urb_priv;
dbg(" USB-error/status: %x : %p",
TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO)), td_list);
if (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x1)) {
if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
td_list->ed->hwHeadP =
(lurb_priv->td[lurb_priv->length - 1]->hwNextTD & ohci_cpu_to_le32 (0xfffffff0)) |
(td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x2));
lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
} else
td_list->ed->hwHeadP &= ohci_cpu_to_le32 (0xfffffff2);
}
#ifdef CONFIG_MPC5200
td_list->hwNextTD = 0;
#endif
}
td_list->next_dl_td = td_rev;
td_rev = td_list;
td_list_hc = ohci_cpu_to_le32 (td_list->hwNextTD) & 0xfffffff0;
}
return td_list;
}
/*-------------------------------------------------------------------------*/
/* td done list */
static int dl_done_list (ohci_t *ohci, td_t *td_list)
{
td_t *td_list_next = NULL;
ed_t *ed;
int cc = 0;
int stat = 0;
/* urb_t *urb; */
urb_priv_t *lurb_priv;
__u32 tdINFO, edHeadP, edTailP;
while (td_list) {
td_list_next = td_list->next_dl_td;
lurb_priv = &urb_priv;
tdINFO = ohci_cpu_to_le32 (td_list->hwINFO);
ed = td_list->ed;
dl_transfer_length(td_list);
/* error code of transfer */
cc = TD_CC_GET (tdINFO);
if (++(lurb_priv->td_cnt) == lurb_priv->length) {
if ((ed->state & (ED_OPER | ED_UNLINK))
&& (lurb_priv->state != URB_DEL)) {
dbg("ConditionCode %#x", cc);
stat = cc_to_error[cc];
urb_finished = 1;
}
}
if (ed->state != ED_NEW) {
edHeadP = ohci_cpu_to_le32 (ed->hwHeadP) & 0xfffffff0;
edTailP = ohci_cpu_to_le32 (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(ohci_t *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;
__u32 datab[4];
__u8 *data_buf = (__u8 *)datab;
__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));
#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:
*(__u16 *) data_buf = m16_swap (1); OK (2);
case RH_GET_STATUS | RH_INTERFACE:
*(__u16 *) data_buf = m16_swap (0); OK (2);
case RH_GET_STATUS | RH_ENDPOINT:
*(__u16 *) data_buf = m16_swap (0); OK (2);
case RH_GET_STATUS | RH_CLASS:
*(__u32 *) data_buf = m32_swap (
RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
OK (4);
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
*(__u32 *) data_buf = 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 [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);
#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)*/);
#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));
#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;
}
/* 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) {
mdelay(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));
#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));
#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 (ohci_t *ohci)
{
int timeout = 30;
int smm_timeout = 50; /* 0,5 sec */
if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
info("USB HC TakeOver from SMM");
while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
mdelay (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) */
ohci->hc_control = 0;
writel (ohci->hc_control, &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 (ohci_t * 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);
writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
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)
{
ohci_t *ohci = &gohci;
struct ohci_regs *regs = ohci->regs;
int ints;
int stat = -1;
if ((ohci->hcca->done_head != 0) &&
!(ohci_cpu_to_le32(ohci->hcca->done_head) & 0x01)) {
ints = OHCI_INTR_WDH;
} else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
ohci->disabled++;
err ("%s device removed!", ohci->slot_name);
return -1;
} else if ((ints &= readl (&regs->intrenable)) == 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);
#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) {
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 = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1;
mdelay(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 (ohci_t *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(int index, void **controller)
{
memset (&gohci, 0, sizeof (ohci_t));
memset (&urb_priv, 0, sizeof (urb_priv_t));
/* 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(td_t) * (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;
#if defined(CONFIG_440EP)
gohci.regs = (struct ohci_regs *)(CONFIG_SYS_PERIPHERAL_BASE | 0x1000);
#elif defined(CONFIG_440EPX) || defined(CONFIG_SYS_USB_HOST)
gohci.regs = (struct ohci_regs *)(CONFIG_SYS_USB_HOST);
#endif
gohci.flags = 0;
gohci.slot_name = "ppc440";
if (hc_reset (&gohci) < 0) {
hc_release_ohci (&gohci);
return -1;
}
if (hc_start (&gohci) < 0) {
err ("can't start usb-%s", gohci.slot_name);
hc_release_ohci (&gohci);
return -1;
}
#ifdef DEBUG
ohci_dump (&gohci, 1);
#endif
ohci_inited = 1;
urb_finished = 1;
return 0;
}
int usb_lowlevel_stop(int index)
{
/* 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);
return 0;
}
#endif /* CONFIG_USB_OHCI */
Reference in a new issue View git blame Copy permalink