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[adm5120] remove 2.6.25 specific stuff

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12598 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
2008-09-13 17:32:20 +00:00
parent efd888e4be
commit b610f4bee8
85 changed files with 1 additions and 14419 deletions
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842
target/linux/adm5120/files/drivers/usb/host/adm5120-dbg.c
View File

@@ -1,842 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci-dbg.c
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
/*-------------------------------------------------------------------------*/
static inline char *ed_typestring(int ed_type)
{
switch (ed_type) {
case PIPE_CONTROL:
return "ctrl";
case PIPE_BULK:
return "bulk";
case PIPE_INTERRUPT:
return "intr";
case PIPE_ISOCHRONOUS:
return "isoc";
}
return "(bad ed_type)";
}
static inline char *ed_statestring(int state)
{
switch (state) {
case ED_IDLE:
return "IDLE";
case ED_UNLINK:
return "UNLINK";
case ED_OPER:
return "OPER";
}
return "?STATE";
}
static inline char *pipestring(int pipe)
{
return ed_typestring(usb_pipetype(pipe));
}
static inline char *td_pidstring(u32 info)
{
switch (info & TD_DP) {
case TD_DP_SETUP:
return "SETUP";
case TD_DP_IN:
return "IN";
case TD_DP_OUT:
return "OUT";
}
return "?PID";
}
static inline char *td_togglestring(u32 info)
{
switch (info & TD_T) {
case TD_T_DATA0:
return "DATA0";
case TD_T_DATA1:
return "DATA1";
case TD_T_CARRY:
return "CARRY";
}
return "?TOGGLE";
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
/* debug| print the main components of an URB
* small: 0) header + data packets 1) just header
*/
static void __attribute__((unused))
urb_print(struct admhcd *ahcd, struct urb *urb, char *str, int small, int status)
{
unsigned int pipe = urb->pipe;
if (!urb->dev || !urb->dev->bus) {
admhc_dbg(ahcd, "%s URB: no dev", str);
return;
}
#ifndef ADMHC_VERBOSE_DEBUG
if (status != 0)
#endif
admhc_dbg(ahcd, "URB-%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d "
"stat=%d\n",
str,
urb,
usb_pipedevice (pipe),
usb_pipeendpoint (pipe),
usb_pipeout(pipe)? "out" : "in",
pipestring(pipe),
urb->transfer_flags,
urb->actual_length,
urb->transfer_buffer_length,
status);
#ifdef ADMHC_VERBOSE_DEBUG
if (!small) {
int i, len;
if (usb_pipecontrol(pipe)) {
admhc_dbg(ahcd, "setup(8):");
for (i = 0; i < 8 ; i++)
printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
printk ("\n");
}
if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
admhc_dbg(ahcd, "data(%d/%d):",
urb->actual_length,
urb->transfer_buffer_length);
len = usb_pipeout(pipe)?
urb->transfer_buffer_length: urb->actual_length;
for (i = 0; i < 16 && i < len; i++)
printk(" %02x", ((__u8 *)urb->transfer_buffer)[i]);
printk("%s stat:%d\n", i < len? "...": "", status);
}
}
#endif /* ADMHC_VERBOSE_DEBUG */
}
#define admhc_dbg_sw(ahcd, next, size, format, arg...) \
do { \
if (next) { \
unsigned s_len; \
s_len = scnprintf(*next, *size, format, ## arg ); \
*size -= s_len; *next += s_len; \
} else \
admhc_dbg(ahcd,format, ## arg ); \
} while (0);
static void admhc_dump_intr_mask(struct admhcd *ahcd, char *label, u32 mask,
char **next, unsigned *size)
{
admhc_dbg_sw(ahcd, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n",
label,
mask,
(mask & ADMHC_INTR_INTA) ? " INTA" : "",
(mask & ADMHC_INTR_FATI) ? " FATI" : "",
(mask & ADMHC_INTR_SWI) ? " SWI" : "",
(mask & ADMHC_INTR_TDC) ? " TDC" : "",
(mask & ADMHC_INTR_FNO) ? " FNO" : "",
(mask & ADMHC_INTR_SO) ? " SO" : "",
(mask & ADMHC_INTR_INSM) ? " INSM" : "",
(mask & ADMHC_INTR_BABI) ? " BABI" : "",
(mask & ADMHC_INTR_7) ? " !7!" : "",
(mask & ADMHC_INTR_6) ? " !6!" : "",
(mask & ADMHC_INTR_RESI) ? " RESI" : "",
(mask & ADMHC_INTR_SOFI) ? " SOFI" : ""
);
}
static void maybe_print_eds(struct admhcd *ahcd, char *label, u32 value,
char **next, unsigned *size)
{
if (value)
admhc_dbg_sw(ahcd, next, size, "%s %08x\n", label, value);
}
static char *buss2string (int state)
{
switch (state) {
case ADMHC_BUSS_RESET:
return "reset";
case ADMHC_BUSS_RESUME:
return "resume";
case ADMHC_BUSS_OPER:
return "operational";
case ADMHC_BUSS_SUSPEND:
return "suspend";
}
return "?state";
}
static void
admhc_dump_status(struct admhcd *ahcd, char **next, unsigned *size)
{
struct admhcd_regs __iomem *regs = ahcd->regs;
u32 temp;
temp = admhc_readl(ahcd, &regs->gencontrol);
admhc_dbg_sw(ahcd, next, size,
"gencontrol 0x%08x%s%s%s%s\n",
temp,
(temp & ADMHC_CTRL_UHFE) ? " UHFE" : "",
(temp & ADMHC_CTRL_SIR) ? " SIR" : "",
(temp & ADMHC_CTRL_DMAA) ? " DMAA" : "",
(temp & ADMHC_CTRL_SR) ? " SR" : ""
);
temp = admhc_readl(ahcd, &regs->host_control);
admhc_dbg_sw(ahcd, next, size,
"host_control 0x%08x BUSS=%s%s\n",
temp,
buss2string(temp & ADMHC_HC_BUSS),
(temp & ADMHC_HC_DMAE) ? " DMAE" : ""
);
admhc_dump_intr_mask(ahcd, "int_status",
admhc_readl(ahcd, &regs->int_status),
next, size);
admhc_dump_intr_mask(ahcd, "int_enable",
admhc_readl(ahcd, &regs->int_enable),
next, size);
maybe_print_eds(ahcd, "hosthead",
admhc_readl(ahcd, &regs->hosthead), next, size);
}
#define dbg_port_sw(hc,num,value,next,size) \
admhc_dbg_sw(hc, next, size, \
"portstatus [%d] " \
"0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
num, temp, \
(temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
(temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
(temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
(temp & ADMHC_PS_PESC) ? " PESC" : "", \
(temp & ADMHC_PS_CSC) ? " CSC" : "", \
\
(temp & ADMHC_PS_LSDA) ? " LSDA" : "", \
(temp & ADMHC_PS_PPS) ? " PPS" : "", \
(temp & ADMHC_PS_PRS) ? " PRS" : "", \
(temp & ADMHC_PS_POCI) ? " POCI" : "", \
(temp & ADMHC_PS_PSS) ? " PSS" : "", \
\
(temp & ADMHC_PS_PES) ? " PES" : "", \
(temp & ADMHC_PS_CCS) ? " CCS" : "" \
);
static void
admhc_dump_roothub(
struct admhcd *ahcd,
int verbose,
char **next,
unsigned *size)
{
u32 temp, i;
temp = admhc_read_rhdesc(ahcd);
if (temp == ~(u32)0)
return;
if (verbose) {
admhc_dbg_sw(ahcd, next, size,
"rhdesc %08x%s%s%s%s%s%s PPCM=%02x%s%s%s%s NUMP=%d(%d)\n",
temp,
(temp & ADMHC_RH_CRWE) ? " CRWE" : "",
(temp & ADMHC_RH_OCIC) ? " OCIC" : "",
(temp & ADMHC_RH_LPSC) ? " LPSC" : "",
(temp & ADMHC_RH_LPSC) ? " DRWE" : "",
(temp & ADMHC_RH_LPSC) ? " OCI" : "",
(temp & ADMHC_RH_LPSC) ? " LPS" : "",
((temp & ADMHC_RH_PPCM) >> 16),
(temp & ADMHC_RH_NOCP) ? " NOCP" : "",
(temp & ADMHC_RH_OCPM) ? " OCPM" : "",
(temp & ADMHC_RH_NPS) ? " NPS" : "",
(temp & ADMHC_RH_PSM) ? " PSM" : "",
(temp & ADMHC_RH_NUMP), ahcd->num_ports
);
}
for (i = 0; i < ahcd->num_ports; i++) {
temp = admhc_read_portstatus(ahcd, i);
dbg_port_sw(ahcd, i, temp, next, size);
}
}
static void admhc_dump(struct admhcd *ahcd, int verbose)
{
admhc_dbg(ahcd, "ADMHC ahcd state\n");
/* dumps some of the state we know about */
admhc_dump_status(ahcd, NULL, NULL);
admhc_dbg(ahcd,"current frame #%04x\n",
admhc_frame_no(ahcd));
admhc_dump_roothub(ahcd, verbose, NULL, NULL);
}
static const char data0[] = "DATA0";
static const char data1[] = "DATA1";
static void admhc_dump_td(const struct admhcd *ahcd, const char *label,
const struct td *td)
{
u32 tmp;
admhc_dbg(ahcd, "%s td %p; urb %p index %d; hwNextTD %08x\n",
label, td,
td->urb, td->index,
hc32_to_cpup(ahcd, &td->hwNextTD));
tmp = hc32_to_cpup(ahcd, &td->hwINFO);
admhc_dbg(ahcd, " status %08x%s CC=%x EC=%d %s %s ISI=%x FN=%x\n",
tmp,
(tmp & TD_OWN) ? " OWN" : "",
TD_CC_GET(tmp),
TD_EC_GET(tmp),
td_togglestring(tmp),
td_pidstring(tmp),
TD_ISI_GET(tmp),
TD_FN_GET(tmp));
tmp = hc32_to_cpup(ahcd, &td->hwCBL);
admhc_dbg(ahcd, " dbp %08x; cbl %08x; LEN=%d%s\n",
hc32_to_cpup(ahcd, &td->hwDBP),
tmp,
TD_BL_GET(tmp),
(tmp & TD_IE) ? " IE" : "");
}
/* caller MUST own hcd spinlock if verbose is set! */
static void __attribute__((unused))
admhc_dump_ed(const struct admhcd *ahcd, const char *label,
const struct ed *ed, int verbose)
{
u32 tmp = hc32_to_cpu(ahcd, ed->hwINFO);
admhc_dbg(ahcd, "%s ed %p %s type %s; next ed %08x\n",
label,
ed, ed_statestring(ed->state), ed_typestring(ed->type),
hc32_to_cpup(ahcd, &ed->hwNextED));
admhc_dbg(ahcd, " info %08x MAX=%d%s%s%s%s EP=%d DEV=%d\n", tmp,
ED_MPS_GET(tmp),
(tmp & ED_ISO) ? " ISO" : "",
(tmp & ED_SKIP) ? " SKIP" : "",
(tmp & ED_SPEED_FULL) ? " FULL" : " LOW",
(tmp & ED_INT) ? " INT" : "",
ED_EN_GET(tmp),
ED_FA_GET(tmp));
tmp = hc32_to_cpup(ahcd, &ed->hwHeadP);
admhc_dbg(ahcd, " tds: head %08x tail %08x %s%s%s\n",
tmp & TD_MASK,
hc32_to_cpup (ahcd, &ed->hwTailP),
(tmp & ED_C) ? data1 : data0,
(tmp & ED_H) ? " HALT" : "",
verbose ? " td list follows" : " (not listing)");
if (verbose) {
struct list_head *tmp;
/* use ed->td_list because HC concurrently modifies
* hwNextTD as it accumulates ed_donelist.
*/
list_for_each(tmp, &ed->td_list) {
struct td *td;
td = list_entry(tmp, struct td, td_list);
admhc_dump_td (ahcd, " ->", td);
}
}
}
#else /* ifdef DEBUG */
static inline void urb_print(struct admhcd *ahcd, struct urb * urb, char * str,
int small) {}
static inline void admhc_dump_ed(const struct admhcd *ahcd, const char *label,
const struct ed *ed, int verbose) {}
static inline void admhc_dump_td(const struct admhcd *ahcd, const char *label,
const struct td *td) {}
static inline void admhc_dump(struct admhcd *ahcd, int verbose) {}
#undef ADMHC_VERBOSE_DEBUG
#endif /* DEBUG */
/*-------------------------------------------------------------------------*/
#ifdef STUB_DEBUG_FILES
static inline void create_debug_files(struct admhcd *bus) { }
static inline void remove_debug_files(struct admhcd *bus) { }
#else
static int debug_async_open(struct inode *, struct file *);
static int debug_periodic_open(struct inode *, struct file *);
static int debug_registers_open(struct inode *, struct file *);
static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
static int debug_close(struct inode *, struct file *);
static const struct file_operations debug_async_fops = {
.owner = THIS_MODULE,
.open = debug_async_open,
.read = debug_output,
.release = debug_close,
};
static const struct file_operations debug_periodic_fops = {
.owner = THIS_MODULE,
.open = debug_periodic_open,
.read = debug_output,
.release = debug_close,
};
static const struct file_operations debug_registers_fops = {
.owner = THIS_MODULE,
.open = debug_registers_open,
.read = debug_output,
.release = debug_close,
};
static struct dentry *admhc_debug_root;
struct debug_buffer {
ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
struct device *dev;
struct mutex mutex; /* protect filling of buffer */
size_t count; /* number of characters filled into buffer */
char *page;
};
static ssize_t
show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed)
{
unsigned temp;
unsigned size = count;
if (!ed)
return 0;
/* dump a snapshot of the bulk or control schedule */
while (ed) {
u32 info = hc32_to_cpu(ahcd, ed->hwINFO);
u32 headp = hc32_to_cpu(ahcd, ed->hwHeadP);
u32 tailp = hc32_to_cpu(ahcd, ed->hwTailP);
struct list_head *entry;
struct td *td;
temp = scnprintf(buf, size,
"ed/%p %s %s %cs dev%d ep%d %s%smax %d %08x%s%s %s"
" h:%08x t:%08x",
ed,
ed_statestring(ed->state),
ed_typestring (ed->type),
(info & ED_SPEED_FULL) ? 'f' : 'l',
info & ED_FA_MASK,
(info >> ED_EN_SHIFT) & ED_EN_MASK,
(info & ED_INT) ? "INT " : "",
(info & ED_ISO) ? "ISO " : "",
(info >> ED_MPS_SHIFT) & ED_MPS_MASK ,
info,
(info & ED_SKIP) ? " S" : "",
(headp & ED_H) ? " H" : "",
(headp & ED_C) ? data1 : data0,
headp & ED_MASK,tailp);
size -= temp;
buf += temp;
list_for_each(entry, &ed->td_list) {
u32 dbp, cbl;
td = list_entry(entry, struct td, td_list);
info = hc32_to_cpup (ahcd, &td->hwINFO);
dbp = hc32_to_cpup (ahcd, &td->hwDBP);
cbl = hc32_to_cpup (ahcd, &td->hwCBL);
temp = scnprintf(buf, size,
"\n\ttd/%p %s %d %s%scc=%x urb %p (%08x,%08x)",
td,
td_pidstring(info),
TD_BL_GET(cbl),
(info & TD_OWN) ? "" : "DONE ",
(cbl & TD_IE) ? "IE " : "",
TD_CC_GET (info), td->urb, info, cbl);
size -= temp;
buf += temp;
}
temp = scnprintf(buf, size, "\n");
size -= temp;
buf += temp;
ed = ed->ed_next;
}
return count - size;
}
static ssize_t fill_async_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
struct admhcd *ahcd;
size_t temp;
unsigned long flags;
bus = dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ahcd = hcd_to_admhcd(hcd);
spin_lock_irqsave(&ahcd->lock, flags);
temp = show_list(ahcd, buf->page, PAGE_SIZE, ahcd->ed_head);
spin_unlock_irqrestore(&ahcd->lock, flags);
return temp;
}
#define DBG_SCHED_LIMIT 64
static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
struct admhcd *ahcd;
struct ed **seen, *ed;
unsigned long flags;
unsigned temp, size, seen_count;
char *next;
unsigned i;
if (!(seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
return 0;
seen_count = 0;
bus = dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ahcd = hcd_to_admhcd(hcd);
next = buf->page;
size = PAGE_SIZE;
temp = scnprintf(next, size, "size = %d\n", NUM_INTS);
size -= temp;
next += temp;
/* dump a snapshot of the periodic schedule (and load) */
spin_lock_irqsave(&ahcd->lock, flags);
for (i = 0; i < NUM_INTS; i++) {
if (!(ed = ahcd->periodic [i]))
continue;
temp = scnprintf(next, size, "%2d [%3d]:", i, ahcd->load [i]);
size -= temp;
next += temp;
do {
temp = scnprintf(next, size, " ed%d/%p",
ed->interval, ed);
size -= temp;
next += temp;
for (temp = 0; temp < seen_count; temp++) {
if (seen [temp] == ed)
break;
}
/* show more info the first time around */
if (temp == seen_count) {
u32 info = hc32_to_cpu (ahcd, ed->hwINFO);
struct list_head *entry;
unsigned qlen = 0;
/* qlen measured here in TDs, not urbs */
list_for_each (entry, &ed->td_list)
qlen++;
temp = scnprintf(next, size,
" (%cs dev%d ep%d%s qlen %u"
" max %d %08x%s%s)",
(info & ED_SPEED_FULL) ? 'f' : 'l',
ED_FA_GET(info),
ED_EN_GET(info),
(info & ED_ISO) ? "iso" : "int",
qlen,
ED_MPS_GET(info),
info,
(info & ED_SKIP) ? " K" : "",
(ed->hwHeadP &
cpu_to_hc32(ahcd, ED_H)) ?
" H" : "");
size -= temp;
next += temp;
if (seen_count < DBG_SCHED_LIMIT)
seen [seen_count++] = ed;
ed = ed->ed_next;
} else {
/* we've seen it and what's after */
temp = 0;
ed = NULL;
}
} while (ed);
temp = scnprintf(next, size, "\n");
size -= temp;
next += temp;
}
spin_unlock_irqrestore(&ahcd->lock, flags);
kfree (seen);
return PAGE_SIZE - size;
}
#undef DBG_SCHED_LIMIT
static ssize_t fill_registers_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
struct admhcd *ahcd;
struct admhcd_regs __iomem *regs;
unsigned long flags;
unsigned temp, size;
char *next;
u32 rdata;
bus = dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ahcd = hcd_to_admhcd(hcd);
regs = ahcd->regs;
next = buf->page;
size = PAGE_SIZE;
spin_lock_irqsave(&ahcd->lock, flags);
/* dump driver info, then registers in spec order */
admhc_dbg_sw(ahcd, &next, &size,
"bus %s, device %s\n"
"%s\n"
"%s version " DRIVER_VERSION "\n",
hcd->self.controller->bus->name,
hcd->self.controller->bus_id,
hcd->product_desc,
hcd_name);
if (bus->controller->power.power_state.event) {
size -= scnprintf(next, size,
"SUSPENDED (no register access)\n");
goto done;
}
admhc_dump_status(ahcd, &next, &size);
/* other registers mostly affect frame timings */
rdata = admhc_readl(ahcd, &regs->fminterval);
temp = scnprintf(next, size,
"fmintvl 0x%08x %sFSLDP=0x%04x FI=0x%04x\n",
rdata, (rdata & ADMHC_SFI_FIT) ? "FIT " : "",
(rdata >> ADMHC_SFI_FSLDP_SHIFT) & ADMHC_SFI_FSLDP_MASK,
rdata & ADMHC_SFI_FI_MASK);
size -= temp;
next += temp;
rdata = admhc_readl(ahcd, &regs->fmnumber);
temp = scnprintf(next, size, "fmnumber 0x%08x %sFR=0x%04x FN=%04x\n",
rdata, (rdata & ADMHC_SFN_FRT) ? "FRT " : "",
(rdata >> ADMHC_SFN_FR_SHIFT) & ADMHC_SFN_FR_MASK,
rdata & ADMHC_SFN_FN_MASK);
size -= temp;
next += temp;
/* TODO: use predefined bitmask */
rdata = admhc_readl(ahcd, &regs->lsthresh);
temp = scnprintf(next, size, "lsthresh 0x%04x\n",
rdata & 0x3fff);
size -= temp;
next += temp;
temp = scnprintf(next, size, "hub poll timer: %s\n",
admhcd_to_hcd(ahcd)->poll_rh ? "ON" : "OFF");
size -= temp;
next += temp;
/* roothub */
admhc_dump_roothub(ahcd, 1, &next, &size);
done:
spin_unlock_irqrestore(&ahcd->lock, flags);
return PAGE_SIZE - size;
}
static struct debug_buffer *alloc_buffer(struct device *dev,
ssize_t (*fill_func)(struct debug_buffer *))
{
struct debug_buffer *buf;
buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
if (buf) {
buf->dev = dev;
buf->fill_func = fill_func;
mutex_init(&buf->mutex);
}
return buf;
}
static int fill_buffer(struct debug_buffer *buf)
{
int ret = 0;
if (!buf->page)
buf->page = (char *)get_zeroed_page(GFP_KERNEL);
if (!buf->page) {
ret = -ENOMEM;
goto out;
}
ret = buf->fill_func(buf);
if (ret >= 0) {
buf->count = ret;
ret = 0;
}
out:
return ret;
}
static ssize_t debug_output(struct file *file, char __user *user_buf,
size_t len, loff_t *offset)
{
struct debug_buffer *buf = file->private_data;
int ret = 0;
mutex_lock(&buf->mutex);
if (buf->count == 0) {
ret = fill_buffer(buf);
if (ret != 0) {
mutex_unlock(&buf->mutex);
goto out;
}
}
mutex_unlock(&buf->mutex);
ret = simple_read_from_buffer(user_buf, len, offset,
buf->page, buf->count);
out:
return ret;
}
static int debug_close(struct inode *inode, struct file *file)
{
struct debug_buffer *buf = file->private_data;
if (buf) {
if (buf->page)
free_page((unsigned long)buf->page);
kfree(buf);
}
return 0;
}
static int debug_async_open(struct inode *inode, struct file *file)
{
file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
return file->private_data ? 0 : -ENOMEM;
}
static int debug_periodic_open(struct inode *inode, struct file *file)
{
file->private_data = alloc_buffer(inode->i_private,
fill_periodic_buffer);
return file->private_data ? 0 : -ENOMEM;
}
static int debug_registers_open(struct inode *inode, struct file *file)
{
file->private_data = alloc_buffer(inode->i_private,
fill_registers_buffer);
return file->private_data ? 0 : -ENOMEM;
}
static inline void create_debug_files(struct admhcd *ahcd)
{
struct usb_bus *bus = &admhcd_to_hcd(ahcd)->self;
struct device *dev = bus->dev;
ahcd->debug_dir = debugfs_create_dir(bus->bus_name, admhc_debug_root);
if (!ahcd->debug_dir)
goto dir_error;
ahcd->debug_async = debugfs_create_file("async", S_IRUGO,
ahcd->debug_dir, dev,
&debug_async_fops);
if (!ahcd->debug_async)
goto async_error;
ahcd->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
ahcd->debug_dir, dev,
&debug_periodic_fops);
if (!ahcd->debug_periodic)
goto periodic_error;
ahcd->debug_registers = debugfs_create_file("registers", S_IRUGO,
ahcd->debug_dir, dev,
&debug_registers_fops);
if (!ahcd->debug_registers)
goto registers_error;
admhc_dbg(ahcd, "created debug files\n");
return;
registers_error:
debugfs_remove(ahcd->debug_periodic);
periodic_error:
debugfs_remove(ahcd->debug_async);
async_error:
debugfs_remove(ahcd->debug_dir);
dir_error:
ahcd->debug_periodic = NULL;
ahcd->debug_async = NULL;
ahcd->debug_dir = NULL;
}
static inline void remove_debug_files(struct admhcd *ahcd)
{
debugfs_remove(ahcd->debug_registers);
debugfs_remove(ahcd->debug_periodic);
debugfs_remove(ahcd->debug_async);
debugfs_remove(ahcd->debug_dir);
}
#endif
/*-------------------------------------------------------------------------*/

236
target/linux/adm5120/files/drivers/usb/host/adm5120-drv.c
View File

@@ -1,236 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci-au1xxx.c
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
* (C) Copyright 2002 Hewlett-Packard Company
*
* Written by Christopher Hoover <ch@hpl.hp.com>
* Based on fragments of previous driver by Rusell King et al.
*
* Modified for LH7A404 from ahcd-sa1111.c
* by Durgesh Pattamatta <pattamattad@sharpsec.com>
* Modified for AMD Alchemy Au1xxx
* by Matt Porter <mporter@kernel.crashing.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#include <linux/platform_device.h>
#include <linux/signal.h>
#include <asm/bootinfo.h>
#include <adm5120_defs.h>
#ifdef DEBUG
#define HCD_DBG(f, a...) printk(KERN_DEBUG "%s: " f, hcd_name, ## a)
#else
#define HCD_DBG(f, a...) do {} while (0)
#endif
#define HCD_ERR(f, a...) printk(KERN_ERR "%s: " f, hcd_name, ## a)
#define HCD_INFO(f, a...) printk(KERN_INFO "%s: " f, hcd_name, ## a)
/*-------------------------------------------------------------------------*/
static int admhc_adm5120_probe(const struct hc_driver *driver,
struct platform_device *dev)
{
int retval;
struct usb_hcd *hcd;
int irq;
struct resource *regs;
/* sanity checks */
regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!regs) {
HCD_DBG("no IOMEM resource found\n");
return -ENODEV;
}
irq = platform_get_irq(dev, 0);
if (irq < 0) {
HCD_DBG("no IRQ resource found\n");
return -ENODEV;
}
hcd = usb_create_hcd(driver, &dev->dev, "ADM5120");
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = regs->start;
hcd->rsrc_len = regs->end - regs->start + 1;
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
HCD_DBG("request_mem_region failed\n");
retval = -EBUSY;
goto err_dev;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
HCD_DBG("ioremap failed\n");
retval = -ENOMEM;
goto err_mem;
}
admhc_hcd_init(hcd_to_admhcd(hcd));
retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
if (retval)
goto err_io;
return 0;
err_io:
iounmap(hcd->regs);
err_mem:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_dev:
usb_put_hcd(hcd);
return retval;
}
/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */
static void admhc_adm5120_remove(struct usb_hcd *hcd,
struct platform_device *dev)
{
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
/*-------------------------------------------------------------------------*/
static int __devinit
admhc_adm5120_start(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd (hcd);
int ret;
ret = admhc_init(ahcd);
if (ret < 0) {
HCD_ERR("unable to init %s\n", hcd->self.bus_name);
goto err;
}
ret = admhc_run(ahcd);
if (ret < 0) {
HCD_ERR("unable to run %s\n", hcd->self.bus_name);
goto err_stop;
}
return 0;
err_stop:
admhc_stop(hcd);
err:
return ret;
}
/*-------------------------------------------------------------------------*/
static const struct hc_driver adm5120_hc_driver = {
.description = hcd_name,
.product_desc = "ADM5120 built-in USB 1.1 Host Controller",
.hcd_priv_size = sizeof(struct admhcd),
/*
* generic hardware linkage
*/
.irq = admhc_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.start = admhc_adm5120_start,
.stop = admhc_stop,
.shutdown = admhc_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = admhc_urb_enqueue,
.urb_dequeue = admhc_urb_dequeue,
.endpoint_disable = admhc_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = admhc_get_frame_number,
/*
* root hub support
*/
.hub_status_data = admhc_hub_status_data,
.hub_control = admhc_hub_control,
.hub_irq_enable = admhc_hub_irq_enable,
#ifdef CONFIG_PM
.bus_suspend = admhc_bus_suspend,
.bus_resume = admhc_bus_resume,
#endif
.start_port_reset = admhc_start_port_reset,
};
/*-------------------------------------------------------------------------*/
static int usb_hcd_adm5120_probe(struct platform_device *pdev)
{
int ret;
ret = admhc_adm5120_probe(&adm5120_hc_driver, pdev);
return ret;
}
static int usb_hcd_adm5120_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
admhc_adm5120_remove(hcd, pdev);
return 0;
}
#ifdef CONFIG_PM
/* TODO */
static int usb_hcd_adm5120_suspend(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
return 0;
}
static int usb_hcd_adm5120_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
return 0;
}
#else
#define usb_hcd_adm5120_suspend NULL
#define usb_hcd_adm5120_resume NULL
#endif /* CONFIG_PM */
static struct platform_driver usb_hcd_adm5120_driver = {
.probe = usb_hcd_adm5120_probe,
.remove = usb_hcd_adm5120_remove,
.shutdown = usb_hcd_platform_shutdown,
.suspend = usb_hcd_adm5120_suspend,
.resume = usb_hcd_adm5120_resume,
.driver = {
.name = "adm5120-hcd",
.owner = THIS_MODULE,
},
};

845
target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c
View File

@@ -1,845 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci-hcd.c
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
*
* [ Initialisation is based on Linus' ]
* [ uhci code and gregs ahcd fragments ]
* [ (C) Copyright 1999 Linus Torvalds ]
* [ (C) Copyright 1999 Gregory P. Smith]
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/reboot.h>
#include <linux/debugfs.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/unaligned.h>
#include <asm/byteorder.h>
#include "../core/hcd.h"
#include "../core/hub.h"
#define DRIVER_VERSION "0.25.0"
#define DRIVER_AUTHOR "Gabor Juhos <juhosg at openwrt.org>"
#define DRIVER_DESC "ADMtek USB 1.1 Host Controller Driver"
/*-------------------------------------------------------------------------*/
#undef ADMHC_VERBOSE_DEBUG /* not always helpful */
/* For initializing controller (mask in an HCFS mode too) */
#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
#define ADMHC_INTR_INIT \
( ADMHC_INTR_MIE | ADMHC_INTR_INSM | ADMHC_INTR_FATI \
| ADMHC_INTR_RESI | ADMHC_INTR_TDC | ADMHC_INTR_BABI )
/*-------------------------------------------------------------------------*/
static const char hcd_name [] = "admhc-hcd";
#define STATECHANGE_DELAY msecs_to_jiffies(300)
#include "adm5120.h"
static void admhc_dump(struct admhcd *ahcd, int verbose);
static int admhc_init(struct admhcd *ahcd);
static void admhc_stop(struct usb_hcd *hcd);
#include "adm5120-dbg.c"
#include "adm5120-mem.c"
#include "adm5120-pm.c"
#include "adm5120-hub.c"
#include "adm5120-q.c"
/*-------------------------------------------------------------------------*/
/*
* queue up an urb for anything except the root hub
*/
static int admhc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
gfp_t mem_flags)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct ed *ed;
struct urb_priv *urb_priv;
unsigned int pipe = urb->pipe;
int td_cnt = 0;
unsigned long flags;
int ret = 0;
#ifdef ADMHC_VERBOSE_DEBUG
spin_lock_irqsave(&ahcd->lock, flags);
urb_print(ahcd, urb, "ENQEUE", usb_pipein(pipe), -EINPROGRESS);
spin_unlock_irqrestore(&ahcd->lock, flags);
#endif
/* every endpoint has an ed, locate and maybe (re)initialize it */
ed = ed_get(ahcd, urb->ep, urb->dev, pipe, urb->interval);
if (!ed)
return -ENOMEM;
/* for the private part of the URB we need the number of TDs */
switch (ed->type) {
case PIPE_CONTROL:
if (urb->transfer_buffer_length > TD_DATALEN_MAX)
/* td_submit_urb() doesn't yet handle these */
return -EMSGSIZE;
/* 1 TD for setup, 1 for ACK, plus ... */
td_cnt = 2;
/* FALLTHROUGH */
case PIPE_BULK:
/* one TD for every 4096 Bytes (can be upto 8K) */
td_cnt += urb->transfer_buffer_length / TD_DATALEN_MAX;
/* ... and for any remaining bytes ... */
if ((urb->transfer_buffer_length % TD_DATALEN_MAX) != 0)
td_cnt++;
/* ... and maybe a zero length packet to wrap it up */
if (td_cnt == 0)
td_cnt++;
else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
&& (urb->transfer_buffer_length
% usb_maxpacket(urb->dev, pipe,
usb_pipeout (pipe))) == 0)
td_cnt++;
break;
case PIPE_INTERRUPT:
/*
* for Interrupt IN/OUT transactions, each ED contains
* only 1 TD.
* TODO: check transfer_buffer_length?
*/
td_cnt = 1;
break;
case PIPE_ISOCHRONOUS:
/* number of packets from URB */
td_cnt = urb->number_of_packets;
break;
}
urb_priv = urb_priv_alloc(ahcd, td_cnt, mem_flags);
if (!urb_priv)
return -ENOMEM;
urb_priv->ed = ed;
spin_lock_irqsave(&ahcd->lock, flags);
/* don't submit to a dead HC */
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
ret = -ENODEV;
goto fail;
}
if (!HC_IS_RUNNING(hcd->state)) {
ret = -ENODEV;
goto fail;
}
ret = usb_hcd_link_urb_to_ep(hcd, urb);
if (ret)
goto fail;
/* schedule the ed if needed */
if (ed->state == ED_IDLE) {
ret = ed_schedule(ahcd, ed);
if (ret < 0) {
usb_hcd_unlink_urb_from_ep(hcd, urb);
goto fail;
}
if (ed->type == PIPE_ISOCHRONOUS) {
u16 frame = admhc_frame_no(ahcd);
/* delay a few frames before the first TD */
frame += max_t (u16, 8, ed->interval);
frame &= ~(ed->interval - 1);
frame |= ed->branch;
urb->start_frame = frame;
/* yes, only URB_ISO_ASAP is supported, and
* urb->start_frame is never used as input.
*/
}
} else if (ed->type == PIPE_ISOCHRONOUS)
urb->start_frame = ed->last_iso + ed->interval;
/* fill the TDs and link them to the ed; and
* enable that part of the schedule, if needed
* and update count of queued periodic urbs
*/
urb->hcpriv = urb_priv;
td_submit_urb(ahcd, urb);
#ifdef ADMHC_VERBOSE_DEBUG
admhc_dump_ed(ahcd, "admhc_urb_enqueue", urb_priv->ed, 1);
#endif
fail:
if (ret)
urb_priv_free(ahcd, urb_priv);
spin_unlock_irqrestore(&ahcd->lock, flags);
return ret;
}
/*
* decouple the URB from the HC queues (TDs, urb_priv);
* reporting is always done
* asynchronously, and we might be dealing with an urb that's
* partially transferred, or an ED with other urbs being unlinked.
*/
static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
int status)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
unsigned long flags;
int ret;
spin_lock_irqsave(&ahcd->lock, flags);
#ifdef ADMHC_VERBOSE_DEBUG
urb_print(ahcd, urb, "DEQUEUE", 1, status);
#endif
ret = usb_hcd_check_unlink_urb(hcd, urb, status);
if (ret) {
/* Do nothing */
;
} else if (HC_IS_RUNNING(hcd->state)) {
struct urb_priv *urb_priv;
/* Unless an IRQ completed the unlink while it was being
* handed to us, flag it for unlink and giveback, and force
* some upcoming INTR_SF to call finish_unlinks()
*/
urb_priv = urb->hcpriv;
if (urb_priv) {
if (urb_priv->ed->state == ED_OPER)
start_ed_unlink(ahcd, urb_priv->ed);
}
} else {
/*
* with HC dead, we won't respect hc queue pointers
* any more ... just clean up every urb's memory.
*/
if (urb->hcpriv)
finish_urb(ahcd, urb, status);
}
spin_unlock_irqrestore(&ahcd->lock, flags);
return ret;
}
/*-------------------------------------------------------------------------*/
/* frees config/altsetting state for endpoints,
* including ED memory, dummy TD, and bulk/intr data toggle
*/
static void admhc_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
unsigned long flags;
struct ed *ed = ep->hcpriv;
unsigned limit = 1000;
/* ASSERT: any requests/urbs are being unlinked */
/* ASSERT: nobody can be submitting urbs for this any more */
if (!ed)
return;
#ifdef ADMHC_VERBOSE_DEBUG
spin_lock_irqsave(&ahcd->lock, flags);
admhc_dump_ed(ahcd, "EP-DISABLE", ed, 1);
spin_unlock_irqrestore(&ahcd->lock, flags);
#endif
rescan:
spin_lock_irqsave(&ahcd->lock, flags);
if (!HC_IS_RUNNING(hcd->state)) {
sanitize:
ed->state = ED_IDLE;
finish_unlinks(ahcd, 0);
}
switch (ed->state) {
case ED_UNLINK: /* wait for hw to finish? */
/* major IRQ delivery trouble loses INTR_SOFI too... */
if (limit-- == 0) {
admhc_warn(ahcd, "IRQ INTR_SOFI lossage\n");
goto sanitize;
}
spin_unlock_irqrestore(&ahcd->lock, flags);
schedule_timeout_uninterruptible(1);
goto rescan;
case ED_IDLE: /* fully unlinked */
if (list_empty(&ed->td_list)) {
td_free (ahcd, ed->dummy);
ed_free (ahcd, ed);
break;
}
/* else FALL THROUGH */
default:
/* caller was supposed to have unlinked any requests;
* that's not our job. can't recover; must leak ed.
*/
admhc_err(ahcd, "leak ed %p (#%02x) state %d%s\n",
ed, ep->desc.bEndpointAddress, ed->state,
list_empty(&ed->td_list) ? "" : " (has tds)");
td_free(ahcd, ed->dummy);
break;
}
ep->hcpriv = NULL;
spin_unlock_irqrestore(&ahcd->lock, flags);
return;
}
static int admhc_get_frame_number(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
return admhc_frame_no(ahcd);
}
static void admhc_usb_reset(struct admhcd *ahcd)
{
#if 0
ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
ahcd->hc_control &= OHCI_CTRL_RWC;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->regs->control);
#else
/* FIXME */
ahcd->host_control = ADMHC_BUSS_RESET;
admhc_writel(ahcd, ahcd->host_control ,&ahcd->regs->host_control);
#endif
}
/* admhc_shutdown forcibly disables IRQs and DMA, helping kexec and
* other cases where the next software may expect clean state from the
* "firmware". this is bus-neutral, unlike shutdown() methods.
*/
static void
admhc_shutdown(struct usb_hcd *hcd)
{
struct admhcd *ahcd;
ahcd = hcd_to_admhcd(hcd);
admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
admhc_dma_disable(ahcd);
admhc_usb_reset(ahcd);
/* flush the writes */
admhc_writel_flush(ahcd);
}
/*-------------------------------------------------------------------------*
* HC functions
*-------------------------------------------------------------------------*/
static void admhc_eds_cleanup(struct admhcd *ahcd)
{
if (ahcd->ed_tails[PIPE_INTERRUPT]) {
ed_free(ahcd, ahcd->ed_tails[PIPE_INTERRUPT]);
ahcd->ed_tails[PIPE_INTERRUPT] = NULL;
}
if (ahcd->ed_tails[PIPE_ISOCHRONOUS]) {
ed_free(ahcd, ahcd->ed_tails[PIPE_ISOCHRONOUS]);
ahcd->ed_tails[PIPE_ISOCHRONOUS] = NULL;
}
if (ahcd->ed_tails[PIPE_CONTROL]) {
ed_free(ahcd, ahcd->ed_tails[PIPE_CONTROL]);
ahcd->ed_tails[PIPE_CONTROL] = NULL;
}
if (ahcd->ed_tails[PIPE_BULK]) {
ed_free(ahcd, ahcd->ed_tails[PIPE_BULK]);
ahcd->ed_tails[PIPE_BULK] = NULL;
}
ahcd->ed_head = NULL;
}
#define ED_DUMMY_INFO (ED_SPEED_FULL | ED_SKIP)
static int admhc_eds_init(struct admhcd *ahcd)
{
struct ed *ed;
ed = ed_create(ahcd, PIPE_INTERRUPT, ED_DUMMY_INFO);
if (!ed)
goto err;
ahcd->ed_tails[PIPE_INTERRUPT] = ed;
ed = ed_create(ahcd, PIPE_ISOCHRONOUS, ED_DUMMY_INFO);
if (!ed)
goto err;
ahcd->ed_tails[PIPE_ISOCHRONOUS] = ed;
ed->ed_prev = ahcd->ed_tails[PIPE_INTERRUPT];
ahcd->ed_tails[PIPE_INTERRUPT]->ed_next = ed;
ahcd->ed_tails[PIPE_INTERRUPT]->hwNextED = cpu_to_hc32(ahcd, ed->dma);
ed = ed_create(ahcd, PIPE_CONTROL, ED_DUMMY_INFO);
if (!ed)
goto err;
ahcd->ed_tails[PIPE_CONTROL] = ed;
ed->ed_prev = ahcd->ed_tails[PIPE_ISOCHRONOUS];
ahcd->ed_tails[PIPE_ISOCHRONOUS]->ed_next = ed;
ahcd->ed_tails[PIPE_ISOCHRONOUS]->hwNextED = cpu_to_hc32(ahcd, ed->dma);
ed = ed_create(ahcd, PIPE_BULK, ED_DUMMY_INFO);
if (!ed)
goto err;
ahcd->ed_tails[PIPE_BULK] = ed;
ed->ed_prev = ahcd->ed_tails[PIPE_CONTROL];
ahcd->ed_tails[PIPE_CONTROL]->ed_next = ed;
ahcd->ed_tails[PIPE_CONTROL]->hwNextED = cpu_to_hc32(ahcd, ed->dma);
ahcd->ed_head = ahcd->ed_tails[PIPE_INTERRUPT];
#ifdef ADMHC_VERBOSE_DEBUG
admhc_dump_ed(ahcd, "ed intr", ahcd->ed_tails[PIPE_INTERRUPT], 1);
admhc_dump_ed(ahcd, "ed isoc", ahcd->ed_tails[PIPE_ISOCHRONOUS], 1);
admhc_dump_ed(ahcd, "ed ctrl", ahcd->ed_tails[PIPE_CONTROL], 1);
admhc_dump_ed(ahcd, "ed bulk", ahcd->ed_tails[PIPE_BULK], 1);
#endif
return 0;
err:
admhc_eds_cleanup(ahcd);
return -ENOMEM;
}
/* init memory, and kick BIOS/SMM off */
static int admhc_init(struct admhcd *ahcd)
{
struct usb_hcd *hcd = admhcd_to_hcd(ahcd);
int ret;
admhc_disable(ahcd);
ahcd->regs = hcd->regs;
/* Disable HC interrupts */
admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
/* Read the number of ports unless overridden */
if (ahcd->num_ports == 0)
ahcd->num_ports = admhc_read_rhdesc(ahcd) & ADMHC_RH_NUMP;
ret = admhc_mem_init(ahcd);
if (ret)
goto err;
/* init dummy endpoints */
ret = admhc_eds_init(ahcd);
if (ret)
goto err;
create_debug_files(ahcd);
return 0;
err:
admhc_stop(hcd);
return ret;
}
/*-------------------------------------------------------------------------*/
/* Start an OHCI controller, set the BUS operational
* resets USB and controller
* enable interrupts
*/
static int admhc_run(struct admhcd *ahcd)
{
u32 temp;
int first = ahcd->fminterval == 0;
struct usb_hcd *hcd = admhcd_to_hcd(ahcd);
admhc_disable(ahcd);
/* boot firmware should have set this up (5.1.1.3.1) */
if (first) {
temp = admhc_readl(ahcd, &ahcd->regs->fminterval);
ahcd->fminterval = temp & ADMHC_SFI_FI_MASK;
if (ahcd->fminterval != FI)
admhc_dbg(ahcd, "fminterval delta %d\n",
ahcd->fminterval - FI);
ahcd->fminterval |=
(FSLDP(ahcd->fminterval) << ADMHC_SFI_FSLDP_SHIFT);
/* also: power/overcurrent flags in rhdesc */
}
#if 0 /* TODO: not applicable */
/* Reset USB nearly "by the book". RemoteWakeupConnected was
* saved if boot firmware (BIOS/SMM/...) told us it's connected,
* or if bus glue did the same (e.g. for PCI add-in cards with
* PCI PM support).
*/
if ((ahcd->hc_control & OHCI_CTRL_RWC) != 0
&& !device_may_wakeup(hcd->self.controller))
device_init_wakeup(hcd->self.controller, 1);
#endif
switch (ahcd->host_control & ADMHC_HC_BUSS) {
case ADMHC_BUSS_OPER:
temp = 0;
break;
case ADMHC_BUSS_SUSPEND:
/* FALLTHROUGH ? */
case ADMHC_BUSS_RESUME:
ahcd->host_control = ADMHC_BUSS_RESUME;
temp = 10 /* msec wait */;
break;
/* case ADMHC_BUSS_RESET: */
default:
ahcd->host_control = ADMHC_BUSS_RESET;
temp = 50 /* msec wait */;
break;
}
admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
/* flush the writes */
admhc_writel_flush(ahcd);
msleep(temp);
temp = admhc_read_rhdesc(ahcd);
if (!(temp & ADMHC_RH_NPS)) {
/* power down each port */
for (temp = 0; temp < ahcd->num_ports; temp++)
admhc_write_portstatus(ahcd, temp, ADMHC_PS_CPP);
}
/* flush those writes */
admhc_writel_flush(ahcd);
/* 2msec timelimit here means no irqs/preempt */
spin_lock_irq(&ahcd->lock);
admhc_writel(ahcd, ADMHC_CTRL_SR, &ahcd->regs->gencontrol);
temp = 30; /* ... allow extra time */
while ((admhc_readl(ahcd, &ahcd->regs->gencontrol) & ADMHC_CTRL_SR) != 0) {
if (--temp == 0) {
spin_unlock_irq(&ahcd->lock);
admhc_err(ahcd, "USB HC reset timed out!\n");
return -1;
}
udelay(1);
}
/* enable HOST mode, before access any host specific register */
admhc_writel(ahcd, ADMHC_CTRL_UHFE, &ahcd->regs->gencontrol);
/* Tell the controller where the descriptor list is */
admhc_writel(ahcd, (u32)ahcd->ed_head->dma, &ahcd->regs->hosthead);
periodic_reinit(ahcd);
/* use rhsc irqs after khubd is fully initialized */
hcd->poll_rh = 1;
hcd->uses_new_polling = 1;
#if 0
/* wake on ConnectStatusChange, matching external hubs */
admhc_writel(ahcd, RH_HS_DRWE, &ahcd->regs->roothub.status);
#else
/* FIXME roothub_write_status (ahcd, ADMHC_RH_DRWE); */
#endif
/* Choose the interrupts we care about now, others later on demand */
admhc_intr_ack(ahcd, ~0);
admhc_intr_enable(ahcd, ADMHC_INTR_INIT);
admhc_writel(ahcd, ADMHC_RH_NPS | ADMHC_RH_LPSC, &ahcd->regs->rhdesc);
/* flush those writes */
admhc_writel_flush(ahcd);
/* start controller operations */
ahcd->host_control = ADMHC_BUSS_OPER;
admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
temp = 20;
while ((admhc_readl(ahcd, &ahcd->regs->host_control)
& ADMHC_HC_BUSS) != ADMHC_BUSS_OPER) {
if (--temp == 0) {
spin_unlock_irq(&ahcd->lock);
admhc_err(ahcd, "unable to setup operational mode!\n");
return -1;
}
mdelay(1);
}
hcd->state = HC_STATE_RUNNING;
ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
#if 0
/* FIXME: enabling DMA is always failed here for an unknown reason */
admhc_dma_enable(ahcd);
temp = 200;
while ((admhc_readl(ahcd, &ahcd->regs->host_control)
& ADMHC_HC_DMAE) != ADMHC_HC_DMAE) {
if (--temp == 0) {
spin_unlock_irq(&ahcd->lock);
admhc_err(ahcd, "unable to enable DMA!\n");
admhc_dump(ahcd, 1);
return -1;
}
mdelay(1);
}
#endif
spin_unlock_irq(&ahcd->lock);
mdelay(ADMHC_POTPGT);
return 0;
}
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
static irqreturn_t admhc_irq(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct admhcd_regs __iomem *regs = ahcd->regs;
u32 ints;
ints = admhc_readl(ahcd, &regs->int_status);
if ((ints & ADMHC_INTR_INTA) == 0) {
/* no unmasked interrupt status is set */
return IRQ_NONE;
}
ints &= admhc_readl(ahcd, &regs->int_enable);
if (ints & ADMHC_INTR_FATI) {
/* e.g. due to PCI Master/Target Abort */
admhc_disable(ahcd);
admhc_err(ahcd, "Fatal Error, controller disabled\n");
admhc_dump(ahcd, 1);
admhc_usb_reset(ahcd);
}
if (ints & ADMHC_INTR_BABI) {
admhc_intr_disable(ahcd, ADMHC_INTR_BABI);
admhc_intr_ack(ahcd, ADMHC_INTR_BABI);
admhc_err(ahcd, "Babble Detected\n");
}
if (ints & ADMHC_INTR_INSM) {
admhc_vdbg(ahcd, "Root Hub Status Change\n");
ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
admhc_intr_ack(ahcd, ADMHC_INTR_RESI | ADMHC_INTR_INSM);
/* NOTE: Vendors didn't always make the same implementation
* choices for RHSC. Many followed the spec; RHSC triggers
* on an edge, like setting and maybe clearing a port status
* change bit. With others it's level-triggered, active
* until khubd clears all the port status change bits. We'll
* always disable it here and rely on polling until khubd
* re-enables it.
*/
admhc_intr_disable(ahcd, ADMHC_INTR_INSM);
usb_hcd_poll_rh_status(hcd);
} else if (ints & ADMHC_INTR_RESI) {
/* For connect and disconnect events, we expect the controller
* to turn on RHSC along with RD. But for remote wakeup events
* this might not happen.
*/
admhc_vdbg(ahcd, "Resume Detect\n");
admhc_intr_ack(ahcd, ADMHC_INTR_RESI);
hcd->poll_rh = 1;
if (ahcd->autostop) {
spin_lock(&ahcd->lock);
admhc_rh_resume(ahcd);
spin_unlock(&ahcd->lock);
} else
usb_hcd_resume_root_hub(hcd);
}
if (ints & ADMHC_INTR_TDC) {
admhc_vdbg(ahcd, "Transfer Descriptor Complete\n");
admhc_intr_ack(ahcd, ADMHC_INTR_TDC);
if (HC_IS_RUNNING(hcd->state))
admhc_intr_disable(ahcd, ADMHC_INTR_TDC);
spin_lock(&ahcd->lock);
admhc_td_complete(ahcd);
spin_unlock(&ahcd->lock);
if (HC_IS_RUNNING(hcd->state))
admhc_intr_enable(ahcd, ADMHC_INTR_TDC);
}
if (ints & ADMHC_INTR_SO) {
/* could track INTR_SO to reduce available PCI/... bandwidth */
admhc_vdbg(ahcd, "Schedule Overrun\n");
}
#if 1
spin_lock(&ahcd->lock);
if (ahcd->ed_rm_list)
finish_unlinks(ahcd, admhc_frame_no(ahcd));
if ((ints & ADMHC_INTR_SOFI) != 0 && !ahcd->ed_rm_list
&& HC_IS_RUNNING(hcd->state))
admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
spin_unlock(&ahcd->lock);
#else
if (ints & ADMHC_INTR_SOFI) {
admhc_vdbg(ahcd, "Start Of Frame\n");
spin_lock(&ahcd->lock);
/* handle any pending ED removes */
finish_unlinks(ahcd, admhc_frameno(ahcd));
/* leaving INTR_SOFI enabled when there's still unlinking
* to be done in the (next frame).
*/
if ((ahcd->ed_rm_list == NULL) ||
HC_IS_RUNNING(hcd->state) == 0)
/*
* disable INTR_SOFI if there are no unlinking to be
* done (in the next frame)
*/
admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
spin_unlock(&ahcd->lock);
}
#endif
if (HC_IS_RUNNING(hcd->state)) {
admhc_intr_ack(ahcd, ints);
admhc_intr_enable(ahcd, ADMHC_INTR_MIE);
admhc_writel_flush(ahcd);
}
return IRQ_HANDLED;
}
/*-------------------------------------------------------------------------*/
static void admhc_stop(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
admhc_dump(ahcd, 1);
flush_scheduled_work();
admhc_usb_reset(ahcd);
admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
free_irq(hcd->irq, hcd);
hcd->irq = -1;
remove_debug_files(ahcd);
admhc_eds_cleanup(ahcd);
admhc_mem_cleanup(ahcd);
}
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_MIPS_ADM5120
#include "adm5120-drv.c"
#define PLATFORM_DRIVER usb_hcd_adm5120_driver
#endif
#if !defined(PLATFORM_DRIVER)
#error "missing bus glue for admhc-hcd"
#endif
#define DRIVER_INFO DRIVER_DESC " version " DRIVER_VERSION
static int __init admhc_hcd_mod_init(void)
{
int ret = 0;
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_INFO "\n", hcd_name);
pr_info("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
sizeof (struct ed), sizeof (struct td));
#ifdef DEBUG
admhc_debug_root = debugfs_create_dir("admhc", NULL);
if (!admhc_debug_root) {
ret = -ENOENT;
goto error_debug;
}
#endif
#ifdef PLATFORM_DRIVER
ret = platform_driver_register(&PLATFORM_DRIVER);
if (ret < 0)
goto error_platform;
#endif
return ret;
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
error_platform:
#endif
#ifdef DEBUG
debugfs_remove(admhc_debug_root);
admhc_debug_root = NULL;
error_debug:
#endif
return ret;
}
module_init(admhc_hcd_mod_init);
static void __exit admhc_hcd_mod_exit(void)
{
platform_driver_unregister(&PLATFORM_DRIVER);
#ifdef DEBUG
debugfs_remove(admhc_debug_root);
#endif
}
module_exit(admhc_hcd_mod_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_INFO);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");

441
target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
View File

@@ -1,441 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci-hub.c
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
/*-------------------------------------------------------------------------*/
/*
* ADM5120 Root Hub ... the nonsharable stuff
*/
#define dbg_port(hc,label,num,value) \
admhc_dbg(hc, \
"%s port%d " \
"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
label, num, value, \
(value & ADMHC_PS_PRSC) ? " PRSC" : "", \
(value & ADMHC_PS_OCIC) ? " OCIC" : "", \
(value & ADMHC_PS_PSSC) ? " PSSC" : "", \
(value & ADMHC_PS_PESC) ? " PESC" : "", \
(value & ADMHC_PS_CSC) ? " CSC" : "", \
\
(value & ADMHC_PS_LSDA) ? " LSDA" : "", \
(value & ADMHC_PS_PPS) ? " PPS" : "", \
(value & ADMHC_PS_PRS) ? " PRS" : "", \
(value & ADMHC_PS_POCI) ? " POCI" : "", \
(value & ADMHC_PS_PSS) ? " PSS" : "", \
\
(value & ADMHC_PS_PES) ? " PES" : "", \
(value & ADMHC_PS_CCS) ? " CCS" : "" \
);
#define dbg_port_write(hc,label,num,value) \
admhc_dbg(hc, \
"%s port%d " \
"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
label, num, value, \
(value & ADMHC_PS_PRSC) ? " PRSC" : "", \
(value & ADMHC_PS_OCIC) ? " OCIC" : "", \
(value & ADMHC_PS_PSSC) ? " PSSC" : "", \
(value & ADMHC_PS_PESC) ? " PESC" : "", \
(value & ADMHC_PS_CSC) ? " CSC" : "", \
\
(value & ADMHC_PS_CPP) ? " CPP" : "", \
(value & ADMHC_PS_SPP) ? " SPP" : "", \
(value & ADMHC_PS_SPR) ? " SPR" : "", \
(value & ADMHC_PS_CPS) ? " CPS" : "", \
(value & ADMHC_PS_SPS) ? " SPS" : "", \
\
(value & ADMHC_PS_SPE) ? " SPE" : "", \
(value & ADMHC_PS_CPE) ? " CPE" : "" \
);
/*-------------------------------------------------------------------------*/
/* hcd->hub_irq_enable() */
static void admhc_hub_irq_enable(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
spin_lock_irq(&ahcd->lock);
if (!ahcd->autostop)
del_timer(&hcd->rh_timer); /* Prevent next poll */
admhc_intr_enable(ahcd, ADMHC_INTR_INSM);
spin_unlock_irq(&ahcd->lock);
}
/*-------------------------------------------------------------------------*/
/* build "status change" packet (one or two bytes) from HC registers */
static int
admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int i, changed = 0, length = 1;
int any_connected = 0;
unsigned long flags;
u32 status;
spin_lock_irqsave(&ahcd->lock, flags);
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
goto done;
/* init status */
status = admhc_read_rhdesc(ahcd);
if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
buf [0] = changed = 1;
else
buf [0] = 0;
if (ahcd->num_ports > 7) {
buf [1] = 0;
length++;
}
/* look at each port */
for (i = 0; i < ahcd->num_ports; i++) {
status = admhc_read_portstatus(ahcd, i);
/* can't autostop if ports are connected */
any_connected |= (status & ADMHC_PS_CCS);
if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
| ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
changed = 1;
if (i < 7)
buf [0] |= 1 << (i + 1);
else
buf [1] |= 1 << (i - 7);
}
}
hcd->poll_rh = admhc_root_hub_state_changes(ahcd, changed,
any_connected);
done:
spin_unlock_irqrestore(&ahcd->lock, flags);
return changed ? length : 0;
}
/*-------------------------------------------------------------------------*/
static int admhc_get_hub_descriptor(struct admhcd *ahcd, char *buf)
{
struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
u32 rh = admhc_read_rhdesc(ahcd);
u16 temp;
desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */
desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */
desc->bHubContrCurrent = 0x00; /* 0mA */
desc->bNbrPorts = ahcd->num_ports;
temp = 1 + (ahcd->num_ports / 8);
desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
/* FIXME */
temp = 0;
if (rh & ADMHC_RH_NPS) /* no power switching? */
temp |= 0x0002;
if (rh & ADMHC_RH_PSM) /* per-port power switching? */
temp |= 0x0001;
if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */
temp |= 0x0010;
else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */
temp |= 0x0008;
desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
desc->bitmap[0] = 0;
desc->bitmap[0] = ~0;
return 0;
}
static int admhc_get_hub_status(struct admhcd *ahcd, char *buf)
{
struct usb_hub_status *hs = (struct usb_hub_status *)buf;
u32 t = admhc_read_rhdesc(ahcd);
u16 status, change;
status = 0;
status |= (t & ADMHC_RH_LPS) ? HUB_STATUS_LOCAL_POWER : 0;
status |= (t & ADMHC_RH_OCI) ? HUB_STATUS_OVERCURRENT : 0;
change = 0;
change |= (t & ADMHC_RH_LPSC) ? HUB_CHANGE_LOCAL_POWER : 0;
change |= (t & ADMHC_RH_OCIC) ? HUB_CHANGE_OVERCURRENT : 0;
hs->wHubStatus = (__force __u16)cpu_to_hc16(ahcd, status);
hs->wHubChange = (__force __u16)cpu_to_hc16(ahcd, change);
return 0;
}
static int admhc_get_port_status(struct admhcd *ahcd, unsigned port, char *buf)
{
struct usb_port_status *ps = (struct usb_port_status *)buf;
u32 t = admhc_read_portstatus(ahcd, port);
u16 status, change;
status = 0;
status |= (t & ADMHC_PS_CCS) ? USB_PORT_STAT_CONNECTION : 0;
status |= (t & ADMHC_PS_PES) ? USB_PORT_STAT_ENABLE : 0;
status |= (t & ADMHC_PS_PSS) ? USB_PORT_STAT_SUSPEND : 0;
status |= (t & ADMHC_PS_POCI) ? USB_PORT_STAT_OVERCURRENT : 0;
status |= (t & ADMHC_PS_PRS) ? USB_PORT_STAT_RESET : 0;
status |= (t & ADMHC_PS_PPS) ? USB_PORT_STAT_POWER : 0;
status |= (t & ADMHC_PS_LSDA) ? USB_PORT_STAT_LOW_SPEED : 0;
change = 0;
change |= (t & ADMHC_PS_CSC) ? USB_PORT_STAT_C_CONNECTION : 0;
change |= (t & ADMHC_PS_PESC) ? USB_PORT_STAT_C_ENABLE : 0;
change |= (t & ADMHC_PS_PSSC) ? USB_PORT_STAT_C_SUSPEND : 0;
change |= (t & ADMHC_PS_OCIC) ? USB_PORT_STAT_C_OVERCURRENT : 0;
change |= (t & ADMHC_PS_PRSC) ? USB_PORT_STAT_C_RESET : 0;
ps->wPortStatus = (__force __u16)cpu_to_hc16(ahcd, status);
ps->wPortChange = (__force __u16)cpu_to_hc16(ahcd, change);
return 0;
}
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_USB_OTG
static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
u32 status;
if (!port)
return -EINVAL;
port--;
/* start port reset before HNP protocol times out */
status = admhc_read_portstatus(ahcd, port);
if (!(status & ADMHC_PS_CCS))
return -ENODEV;
/* khubd will finish the reset later */
admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS);
return 0;
}
static void start_hnp(struct admhcd *ahcd);
#else
#define admhc_start_port_reset NULL
#endif
/*-------------------------------------------------------------------------*/
/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
* not necessarily continuous ... to guard against resume signaling.
* The short timeout is safe for non-root hubs, and is backward-compatible
* with earlier Linux hosts.
*/
#ifdef CONFIG_USB_SUSPEND
#define PORT_RESET_MSEC 50
#else
#define PORT_RESET_MSEC 10
#endif
/* this timer value might be vendor-specific ... */
#define PORT_RESET_HW_MSEC 10
/* wrap-aware logic morphed from <linux/jiffies.h> */
#define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
/* called from some task, normally khubd */
static inline int admhc_port_reset(struct admhcd *ahcd, unsigned port)
{
u32 t;
admhc_vdbg(ahcd, "reset port%d\n", port);
t = admhc_read_portstatus(ahcd, port);
if (!(t & ADMHC_PS_CCS))
return -ENODEV;
admhc_write_portstatus(ahcd, port, ADMHC_PS_SPR);
mdelay(10);
admhc_write_portstatus(ahcd, port, (ADMHC_PS_SPE | ADMHC_PS_CSC));
mdelay(100);
return 0;
}
static inline int admhc_port_enable(struct admhcd *ahcd, unsigned port)
{
u32 t;
admhc_vdbg(ahcd, "enable port%d\n", port);
t = admhc_read_portstatus(ahcd, port);
if (!(t & ADMHC_PS_CCS))
return -ENODEV;
admhc_write_portstatus(ahcd, port, ADMHC_PS_SPE);
return 0;
}
static inline int admhc_port_disable(struct admhcd *ahcd, unsigned port)
{
u32 t;
admhc_vdbg(ahcd, "disable port%d\n", port);
t = admhc_read_portstatus(ahcd, port);
if (!(t & ADMHC_PS_CCS))
return -ENODEV;
admhc_write_portstatus(ahcd, port, ADMHC_PS_CPE);
return 0;
}
static inline int admhc_port_write(struct admhcd *ahcd, unsigned port,
u32 val)
{
#ifdef ADMHC_VERBOSE_DEBUG
dbg_port_write(ahcd, "write", port, val);
#endif
admhc_write_portstatus(ahcd, port, val);
return 0;
}
static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int ports = hcd_to_bus(hcd)->root_hub->maxchild;
int ret = 0;
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
return -ESHUTDOWN;
switch (typeReq) {
case ClearHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
#if 0 /* FIXME */
admhc_writel(ahcd, ADMHC_RH_OCIC,
&ahcd->regs->roothub.status);
#endif
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case ClearPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
ret = admhc_port_disable(ahcd, wIndex);
break;
case USB_PORT_FEAT_SUSPEND:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS);
break;
case USB_PORT_FEAT_POWER:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP);
break;
case USB_PORT_FEAT_C_CONNECTION:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC);
break;
case USB_PORT_FEAT_C_ENABLE:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC);
break;
case USB_PORT_FEAT_C_SUSPEND:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC);
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC);
break;
case USB_PORT_FEAT_C_RESET:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC);
break;
default:
goto error;
}
break;
case GetHubDescriptor:
ret = admhc_get_hub_descriptor(ahcd, buf);
break;
case GetHubStatus:
ret = admhc_get_hub_status(ahcd, buf);
break;
case GetPortStatus:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
ret = admhc_get_port_status(ahcd, wIndex, buf);
break;
case SetHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
/* FIXME: this can be cleared, yes? */
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case SetPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
ret = admhc_port_enable(ahcd, wIndex);
break;
case USB_PORT_FEAT_RESET:
ret = admhc_port_reset(ahcd, wIndex);
break;
case USB_PORT_FEAT_SUSPEND:
#ifdef CONFIG_USB_OTG
if (hcd->self.otg_port == (wIndex + 1)
&& hcd->self.b_hnp_enable)
start_hnp(ahcd);
else
#endif
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS);
break;
case USB_PORT_FEAT_POWER:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP);
break;
default:
goto error;
}
break;
default:
error:
/* "protocol stall" on error */
ret = -EPIPE;
}
return ret;
}

202
target/linux/adm5120/files/drivers/usb/host/adm5120-mem.c
View File

@@ -1,202 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci-mem.c
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
/*-------------------------------------------------------------------------*/
/*
* OHCI deals with three types of memory:
* - data used only by the HCD ... kmalloc is fine
* - async and periodic schedules, shared by HC and HCD ... these
* need to use dma_pool or dma_alloc_coherent
* - driver buffers, read/written by HC ... the hcd glue or the
* device driver provides us with dma addresses
*
* There's also "register" data, which is memory mapped.
* No memory seen by this driver (or any HCD) may be paged out.
*/
/*-------------------------------------------------------------------------*/
static void admhc_hcd_init(struct admhcd *ahcd)
{
ahcd->next_statechange = jiffies;
spin_lock_init(&ahcd->lock);
INIT_LIST_HEAD(&ahcd->pending);
}
/*-------------------------------------------------------------------------*/
static int admhc_mem_init(struct admhcd *ahcd)
{
ahcd->td_cache = dma_pool_create("admhc_td",
admhcd_to_hcd(ahcd)->self.controller,
sizeof(struct td),
TD_ALIGN, /* byte alignment */
0 /* no page-crossing issues */
);
if (!ahcd->td_cache)
goto err;
ahcd->ed_cache = dma_pool_create("admhc_ed",
admhcd_to_hcd(ahcd)->self.controller,
sizeof(struct ed),
ED_ALIGN, /* byte alignment */
0 /* no page-crossing issues */
);
if (!ahcd->ed_cache)
goto err_td_cache;
return 0;
err_td_cache:
dma_pool_destroy(ahcd->td_cache);
ahcd->td_cache = NULL;
err:
return -ENOMEM;
}
static void admhc_mem_cleanup(struct admhcd *ahcd)
{
if (ahcd->td_cache) {
dma_pool_destroy(ahcd->td_cache);
ahcd->td_cache = NULL;
}
if (ahcd->ed_cache) {
dma_pool_destroy(ahcd->ed_cache);
ahcd->ed_cache = NULL;
}
}
/*-------------------------------------------------------------------------*/
/* ahcd "done list" processing needs this mapping */
static inline struct td *dma_to_td(struct admhcd *ahcd, dma_addr_t td_dma)
{
struct td *td;
td_dma &= TD_MASK;
td = ahcd->td_hash[TD_HASH_FUNC(td_dma)];
while (td && td->td_dma != td_dma)
td = td->td_hash;
return td;
}
/* TDs ... */
static struct td *td_alloc(struct admhcd *ahcd, gfp_t mem_flags)
{
dma_addr_t dma;
struct td *td;
td = dma_pool_alloc(ahcd->td_cache, mem_flags, &dma);
if (!td)
return NULL;
/* in case ahcd fetches it, make it look dead */
memset(td, 0, sizeof *td);
td->hwNextTD = cpu_to_hc32(ahcd, dma);
td->td_dma = dma;
/* hashed in td_fill */
return td;
}
static void td_free(struct admhcd *ahcd, struct td *td)
{
struct td **prev = &ahcd->td_hash[TD_HASH_FUNC(td->td_dma)];
while (*prev && *prev != td)
prev = &(*prev)->td_hash;
if (*prev)
*prev = td->td_hash;
#if 0
/* TODO: remove */
else if ((td->hwINFO & cpu_to_hc32(ahcd, TD_DONE)) != 0)
admhc_dbg (ahcd, "no hash for td %p\n", td);
#else
else if ((td->flags & TD_FLAG_DONE) != 0)
admhc_dbg (ahcd, "no hash for td %p\n", td);
#endif
dma_pool_free(ahcd->td_cache, td, td->td_dma);
}
/*-------------------------------------------------------------------------*/
/* EDs ... */
static struct ed *ed_alloc(struct admhcd *ahcd, gfp_t mem_flags)
{
dma_addr_t dma;
struct ed *ed;
ed = dma_pool_alloc(ahcd->ed_cache, mem_flags, &dma);
if (!ed)
return NULL;
memset(ed, 0, sizeof(*ed));
ed->dma = dma;
INIT_LIST_HEAD(&ed->td_list);
INIT_LIST_HEAD(&ed->urb_list);
return ed;
}
static void ed_free(struct admhcd *ahcd, struct ed *ed)
{
dma_pool_free(ahcd->ed_cache, ed, ed->dma);
}
/*-------------------------------------------------------------------------*/
/* URB priv ... */
static void urb_priv_free(struct admhcd *ahcd, struct urb_priv *urb_priv)
{
int i;
for (i = 0; i < urb_priv->td_cnt; i++)
if (urb_priv->td[i])
td_free(ahcd, urb_priv->td[i]);
list_del(&urb_priv->pending);
kfree(urb_priv);
}
static struct urb_priv *urb_priv_alloc(struct admhcd *ahcd, int num_tds,
gfp_t mem_flags)
{
struct urb_priv *priv;
/* allocate the private part of the URB */
priv = kzalloc(sizeof(*priv) + sizeof(struct td) * num_tds, mem_flags);
if (!priv)
goto err;
/* allocate the TDs (deferring hash chain updates) */
for (priv->td_cnt = 0; priv->td_cnt < num_tds; priv->td_cnt++) {
priv->td[priv->td_cnt] = td_alloc(ahcd, mem_flags);
if (priv->td[priv->td_cnt] == NULL)
goto err_free;
}
INIT_LIST_HEAD(&priv->pending);
return priv;
err_free:
urb_priv_free(ahcd, priv);
err:
return NULL;
}

445
target/linux/adm5120/files/drivers/usb/host/adm5120-pm.c
View File

@@ -1,445 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from fragments of the OHCI driver.
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#define OHCI_SCHED_ENABLES \
(OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
#ifdef CONFIG_PM
static int admhc_restart(struct admhcd *ahcd);
static int admhc_rh_suspend(struct admhcd *ahcd, int autostop)
__releases(ahcd->lock)
__acquires(ahcd->lock)
{
int status = 0;
ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_RESUME:
admhc_dbg(ahcd, "resume/suspend?\n");
ahcd->hc_control &= ~OHCI_CTRL_HCFS;
ahcd->hc_control |= OHCI_USB_RESET;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
/* FALL THROUGH */
case OHCI_USB_RESET:
status = -EBUSY;
admhc_dbg(ahcd, "needs reinit!\n");
goto done;
case OHCI_USB_SUSPEND:
if (!ahcd->autostop) {
admhc_dbg(ahcd, "already suspended\n");
goto done;
}
}
admhc_dbg(ahcd, "%s root hub\n",
autostop ? "auto-stop" : "suspend");
/* First stop any processing */
if (!autostop && (ahcd->hc_control & OHCI_SCHED_ENABLES)) {
ahcd->hc_control &= ~OHCI_SCHED_ENABLES;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->intrstatus);
/* sched disables take effect on the next frame,
* then the last WDH could take 6+ msec
*/
admhc_dbg(ahcd, "stopping schedules ...\n");
ahcd->autostop = 0;
spin_unlock_irq (&ahcd->lock);
msleep (8);
spin_lock_irq(&ahcd->lock);
}
dl_done_list (ahcd);
finish_unlinks (ahcd, admhc_frame_no(ahcd));
/* maybe resume can wake root hub */
if (device_may_wakeup(&admhcd_to_hcd(ahcd)->self.root_hub->dev) ||
autostop)
ahcd->hc_control |= OHCI_CTRL_RWE;
else {
admhc_writel(ahcd, OHCI_INTR_RHSC, &ahcd->regs->intrdisable);
ahcd->hc_control &= ~OHCI_CTRL_RWE;
}
/* Suspend hub ... this is the "global (to this bus) suspend" mode,
* which doesn't imply ports will first be individually suspended.
*/
ahcd->hc_control &= ~OHCI_CTRL_HCFS;
ahcd->hc_control |= OHCI_USB_SUSPEND;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
/* no resumes until devices finish suspending */
if (!autostop) {
ahcd->next_statechange = jiffies + msecs_to_jiffies (5);
ahcd->autostop = 0;
}
done:
return status;
}
static inline struct ed *find_head(struct ed *ed)
{
/* for bulk and control lists */
while (ed->ed_prev)
ed = ed->ed_prev;
return ed;
}
/* caller has locked the root hub */
static int admhc_rh_resume(struct admhcd *ahcd)
__releases(ahcd->lock)
__acquires(ahcd->lock)
{
struct usb_hcd *hcd = admhcd_to_hcd (ahcd);
u32 temp, enables;
int status = -EINPROGRESS;
int autostopped = ahcd->autostop;
ahcd->autostop = 0;
ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
if (ahcd->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
/* this can happen after resuming a swsusp snapshot */
if (hcd->state == HC_STATE_RESUMING) {
admhc_dbg(ahcd, "BIOS/SMM active, control %03x\n",
ahcd->hc_control);
status = -EBUSY;
/* this happens when pmcore resumes HC then root */
} else {
admhc_dbg(ahcd, "duplicate resume\n");
status = 0;
}
} else switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_SUSPEND:
ahcd->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
ahcd->hc_control |= OHCI_USB_RESUME;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
admhc_dbg(ahcd, "%s root hub\n",
autostopped ? "auto-start" : "resume");
break;
case OHCI_USB_RESUME:
/* HCFS changes sometime after INTR_RD */
admhc_dbg(ahcd, "%swakeup root hub\n",
autostopped ? "auto-" : "");
break;
case OHCI_USB_OPER:
/* this can happen after resuming a swsusp snapshot */
admhc_dbg(ahcd, "snapshot resume? reinit\n");
status = -EBUSY;
break;
default: /* RESET, we lost power */
admhc_dbg(ahcd, "lost power\n");
status = -EBUSY;
}
if (status == -EBUSY) {
if (!autostopped) {
spin_unlock_irq (&ahcd->lock);
(void) ahcd_init (ahcd);
status = admhc_restart (ahcd);
spin_lock_irq(&ahcd->lock);
}
return status;
}
if (status != -EINPROGRESS)
return status;
if (autostopped)
goto skip_resume;
spin_unlock_irq (&ahcd->lock);
/* Some controllers (lucent erratum) need extra-long delays */
msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
temp = admhc_readl(ahcd, &ahcd->regs->control);
temp &= OHCI_CTRL_HCFS;
if (temp != OHCI_USB_RESUME) {
admhc_err (ahcd, "controller won't resume\n");
spin_lock_irq(&ahcd->lock);
return -EBUSY;
}
/* disable old schedule state, reinit from scratch */
admhc_writel(ahcd, 0, &ahcd->regs->ed_controlhead);
admhc_writel(ahcd, 0, &ahcd->regs->ed_controlcurrent);
admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkhead);
admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkcurrent);
admhc_writel(ahcd, 0, &ahcd->regs->ed_periodcurrent);
admhc_writel(ahcd, (u32) ahcd->hcca_dma, &ahcd->ahcd->regs->hcca);
/* Sometimes PCI D3 suspend trashes frame timings ... */
periodic_reinit(ahcd);
/* the following code is executed with ahcd->lock held and
* irqs disabled if and only if autostopped is true
*/
skip_resume:
/* interrupts might have been disabled */
admhc_writel(ahcd, OHCI_INTR_INIT, &ahcd->regs->int_enable);
if (ahcd->ed_rm_list)
admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->int_enable);
/* Then re-enable operations */
admhc_writel(ahcd, OHCI_USB_OPER, &ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
if (!autostopped)
msleep (3);
temp = ahcd->hc_control;
temp &= OHCI_CTRL_RWC;
temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
ahcd->hc_control = temp;
admhc_writel(ahcd, temp, &ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
/* TRSMRCY */
if (!autostopped) {
msleep (10);
spin_lock_irq(&ahcd->lock);
}
/* now ahcd->lock is always held and irqs are always disabled */
/* keep it alive for more than ~5x suspend + resume costs */
ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
/* maybe turn schedules back on */
enables = 0;
temp = 0;
if (!ahcd->ed_rm_list) {
if (ahcd->ed_controltail) {
admhc_writel(ahcd,
find_head (ahcd->ed_controltail)->dma,
&ahcd->regs->ed_controlhead);
enables |= OHCI_CTRL_CLE;
temp |= OHCI_CLF;
}
if (ahcd->ed_bulktail) {
admhc_writel(ahcd, find_head (ahcd->ed_bulktail)->dma,
&ahcd->regs->ed_bulkhead);
enables |= OHCI_CTRL_BLE;
temp |= OHCI_BLF;
}
}
if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
if (enables) {
admhc_dbg(ahcd, "restarting schedules ... %08x\n", enables);
ahcd->hc_control |= enables;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
if (temp)
admhc_writel(ahcd, temp, &ahcd->regs->cmdstatus);
(void) admhc_readl(ahcd, &ahcd->regs->control);
}
return 0;
}
static int admhc_bus_suspend(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int rc;
spin_lock_irq(&ahcd->lock);
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
rc = -ESHUTDOWN;
else
rc = admhc_rh_suspend(ahcd, 0);
spin_unlock_irq(&ahcd->lock);
return rc;
}
static int admhc_bus_resume(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int rc;
if (time_before(jiffies, ahcd->next_statechange))
msleep(5);
spin_lock_irq(&ahcd->lock);
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
rc = -ESHUTDOWN;
else
rc = admhc_rh_resume(ahcd);
spin_unlock_irq(&ahcd->lock);
/* poll until we know a device is connected or we autostop */
if (rc == 0)
usb_hcd_poll_rh_status(hcd);
return rc;
}
/* Carry out polling-, autostop-, and autoresume-related state changes */
static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
int any_connected)
{
int poll_rh = 1;
switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_OPER:
/* keep on polling until we know a device is connected
* and RHSC is enabled */
if (!ahcd->autostop) {
if (any_connected ||
!device_may_wakeup(&admhcd_to_hcd(ahcd)
->self.root_hub->dev)) {
if (admhc_readl(ahcd, &ahcd->regs->int_enable) &
OHCI_INTR_RHSC)
poll_rh = 0;
} else {
ahcd->autostop = 1;
ahcd->next_statechange = jiffies + HZ;
}
/* if no devices have been attached for one second, autostop */
} else {
if (changed || any_connected) {
ahcd->autostop = 0;
ahcd->next_statechange = jiffies +
STATECHANGE_DELAY;
} else if (time_after_eq(jiffies,
ahcd->next_statechange)
&& !ahcd->ed_rm_list
&& !(ahcd->hc_control &
OHCI_SCHED_ENABLES)) {
ahcd_rh_suspend(ahcd, 1);
}
}
break;
/* if there is a port change, autostart or ask to be resumed */
case OHCI_USB_SUSPEND:
case OHCI_USB_RESUME:
if (changed) {
if (ahcd->autostop)
admhc_rh_resume(ahcd);
else
usb_hcd_resume_root_hub(admhcd_to_hcd(ahcd));
} else {
/* everything is idle, no need for polling */
poll_rh = 0;
}
break;
}
return poll_rh;
}
/*-------------------------------------------------------------------------*/
/* must not be called from interrupt context */
static int admhc_restart(struct admhcd *ahcd)
{
int temp;
int i;
struct urb_priv *priv;
/* mark any devices gone, so they do nothing till khubd disconnects.
* recycle any "live" eds/tds (and urbs) right away.
* later, khubd disconnect processing will recycle the other state,
* (either as disconnect/reconnect, or maybe someday as a reset).
*/
spin_lock_irq(&ahcd->lock);
admhc_disable(ahcd);
usb_root_hub_lost_power(admhcd_to_hcd(ahcd)->self.root_hub);
if (!list_empty(&ahcd->pending))
admhc_dbg(ahcd, "abort schedule...\n");
list_for_each_entry(priv, &ahcd->pending, pending) {
struct urb *urb = priv->td[0]->urb;
struct ed *ed = priv->ed;
switch (ed->state) {
case ED_OPER:
ed->state = ED_UNLINK;
ed->hwINFO |= cpu_to_hc32(ahcd, ED_DEQUEUE);
ed_deschedule (ahcd, ed);
ed->ed_next = ahcd->ed_rm_list;
ed->ed_prev = NULL;
ahcd->ed_rm_list = ed;
/* FALLTHROUGH */
case ED_UNLINK:
break;
default:
admhc_dbg(ahcd, "bogus ed %p state %d\n",
ed, ed->state);
}
if (!urb->unlinked)
urb->unlinked = -ESHUTDOWN;
}
finish_unlinks(ahcd, 0);
spin_unlock_irq(&ahcd->lock);
/* paranoia, in case that didn't work: */
/* empty the interrupt branches */
for (i = 0; i < NUM_INTS; i++) ahcd->load[i] = 0;
for (i = 0; i < NUM_INTS; i++) ahcd->hcca->int_table[i] = 0;
/* no EDs to remove */
ahcd->ed_rm_list = NULL;
/* empty control and bulk lists */
ahcd->ed_controltail = NULL;
ahcd->ed_bulktail = NULL;
if ((temp = admhc_run(ahcd)) < 0) {
admhc_err(ahcd, "can't restart, %d\n", temp);
return temp;
} else {
/* here we "know" root ports should always stay powered,
* and that if we try to turn them back on the root hub
* will respond to CSC processing.
*/
i = ahcd->num_ports;
while (i--)
admhc_writel(ahcd, RH_PS_PSS,
&ahcd->regs->portstatus[i]);
admhc_dbg(ahcd, "restart complete\n");
}
return 0;
}
#else /* CONFIG_PM */
static inline int admhc_rh_resume(struct admhcd *ahcd)
{
return 0;
}
/* Carry out polling-related state changes.
* autostop isn't used when CONFIG_PM is turned off.
*/
static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
int any_connected)
{
int poll_rh = 1;
/* keep on polling until RHSC is enabled */
if (admhc_readl(ahcd, &ahcd->regs->int_enable) & ADMHC_INTR_INSM)
poll_rh = 0;
return poll_rh;
}
#endif /* CONFIG_PM */

955
target/linux/adm5120/files/drivers/usb/host/adm5120-q.c
View File

@@ -1,955 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci-q.c
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#include <linux/irq.h>
/*-------------------------------------------------------------------------*/
/*
* URB goes back to driver, and isn't reissued.
* It's completely gone from HC data structures.
* PRECONDITION: ahcd lock held, irqs blocked.
*/
static void
finish_urb(struct admhcd *ahcd, struct urb *urb, int status)
__releases(ahcd->lock)
__acquires(ahcd->lock)
{
urb_priv_free(ahcd, urb->hcpriv);
if (likely(status == -EINPROGRESS))
status = 0;
switch (usb_pipetype(urb->pipe)) {
case PIPE_ISOCHRONOUS:
admhcd_to_hcd(ahcd)->self.bandwidth_isoc_reqs--;
break;
case PIPE_INTERRUPT:
admhcd_to_hcd(ahcd)->self.bandwidth_int_reqs--;
break;
}
#ifdef ADMHC_VERBOSE_DEBUG
urb_print(ahcd, urb, "RET", usb_pipeout (urb->pipe), status);
#endif
/* urb->complete() can reenter this HCD */
usb_hcd_unlink_urb_from_ep(admhcd_to_hcd(ahcd), urb);
spin_unlock(&ahcd->lock);
usb_hcd_giveback_urb(admhcd_to_hcd(ahcd), urb, status);
spin_lock(&ahcd->lock);
}
/*-------------------------------------------------------------------------*
* ED handling functions
*-------------------------------------------------------------------------*/
#if 0 /* FIXME */
/* search for the right schedule branch to use for a periodic ed.
* does some load balancing; returns the branch, or negative errno.
*/
static int balance(struct admhcd *ahcd, int interval, int load)
{
int i, branch = -ENOSPC;
/* iso periods can be huge; iso tds specify frame numbers */
if (interval > NUM_INTS)
interval = NUM_INTS;
/* search for the least loaded schedule branch of that period
* that has enough bandwidth left unreserved.
*/
for (i = 0; i < interval ; i++) {
if (branch < 0 || ahcd->load [branch] > ahcd->load [i]) {
int j;
/* usb 1.1 says 90% of one frame */
for (j = i; j < NUM_INTS; j += interval) {
if ((ahcd->load [j] + load) > 900)
break;
}
if (j < NUM_INTS)
continue;
branch = i;
}
}
return branch;
}
#endif
/*-------------------------------------------------------------------------*/
#if 0 /* FIXME */
/* both iso and interrupt requests have periods; this routine puts them
* into the schedule tree in the apppropriate place. most iso devices use
* 1msec periods, but that's not required.
*/
static void periodic_link (struct admhcd *ahcd, struct ed *ed)
{
unsigned i;
admhc_vdbg (ahcd, "link %sed %p branch %d [%dus.], interval %d\n",
(ed->hwINFO & cpu_to_hc32(ahcd, ED_ISO)) ? "iso " : "",
ed, ed->branch, ed->load, ed->interval);
for (i = ed->branch; i < NUM_INTS; i += ed->interval) {
struct ed **prev = &ahcd->periodic [i];
__hc32 *prev_p = &ahcd->hcca->int_table [i];
struct ed *here = *prev;
/* sorting each branch by period (slow before fast)
* lets us share the faster parts of the tree.
* (plus maybe: put interrupt eds before iso)
*/
while (here && ed != here) {
if (ed->interval > here->interval)
break;
prev = &here->ed_next;
prev_p = &here->hwNextED;
here = *prev;
}
if (ed != here) {
ed->ed_next = here;
if (here)
ed->hwNextED = *prev_p;
wmb ();
*prev = ed;
*prev_p = cpu_to_hc32(ahcd, ed->dma);
wmb();
}
ahcd->load [i] += ed->load;
}
admhcd_to_hcd(ahcd)->self.bandwidth_allocated += ed->load / ed->interval;
}
#endif
/* link an ed into the HC chain */
static int ed_schedule(struct admhcd *ahcd, struct ed *ed)
{
struct ed *old_tail;
if (admhcd_to_hcd(ahcd)->state == HC_STATE_QUIESCING)
return -EAGAIN;
ed->state = ED_OPER;
old_tail = ahcd->ed_tails[ed->type];
ed->ed_next = old_tail->ed_next;
if (ed->ed_next) {
ed->ed_next->ed_prev = ed;
ed->hwNextED = cpu_to_hc32(ahcd, ed->ed_next->dma);
}
ed->ed_prev = old_tail;
old_tail->ed_next = ed;
old_tail->hwNextED = cpu_to_hc32(ahcd, ed->dma);
ahcd->ed_tails[ed->type] = ed;
admhc_dma_enable(ahcd);
return 0;
}
/*-------------------------------------------------------------------------*/
#if 0 /* FIXME */
/* scan the periodic table to find and unlink this ED */
static void periodic_unlink (struct admhcd *ahcd, struct ed *ed)
{
int i;
for (i = ed->branch; i < NUM_INTS; i += ed->interval) {
struct ed *temp;
struct ed **prev = &ahcd->periodic [i];
__hc32 *prev_p = &ahcd->hcca->int_table [i];
while (*prev && (temp = *prev) != ed) {
prev_p = &temp->hwNextED;
prev = &temp->ed_next;
}
if (*prev) {
*prev_p = ed->hwNextED;
*prev = ed->ed_next;
}
ahcd->load [i] -= ed->load;
}
admhcd_to_hcd(ahcd)->self.bandwidth_allocated -= ed->load / ed->interval;
admhc_vdbg (ahcd, "unlink %sed %p branch %d [%dus.], interval %d\n",
(ed->hwINFO & cpu_to_hc32(ahcd, ED_ISO)) ? "iso " : "",
ed, ed->branch, ed->load, ed->interval);
}
#endif
/* unlink an ed from the HC chain.
* 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
* (assuming it already started that, which needn't be true).
*
* ED_UNLINK is a transient state: the HC may still see this ED, but soon
* it won't. ED_SKIP means the HC will finish its current transaction,
* but won't start anything new. The TD queue may still grow; device
* drivers don't know about this HCD-internal state.
*
* When the HC can't see the ED, something changes ED_UNLINK to one of:
*
* - ED_OPER: when there's any request queued, the ED gets rescheduled
* immediately. HC should be working on them.
*
* - ED_IDLE: when there's no TD queue. there's no reason for the HC
* to care about this ED; safe to disable the endpoint.
*
* When finish_unlinks() runs later, after SOF interrupt, it will often
* complete one or more URB unlinks before making that state change.
*/
static void ed_deschedule(struct admhcd *ahcd, struct ed *ed)
{
#ifdef ADMHC_VERBOSE_DEBUG
admhc_dump_ed(ahcd, "ED-DESCHED", ed, 1);
#endif
ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP);
wmb();
ed->state = ED_UNLINK;
/* remove this ED from the HC list */
ed->ed_prev->hwNextED = ed->hwNextED;
/* and remove it from our list also */
ed->ed_prev->ed_next = ed->ed_next;
if (ed->ed_next)
ed->ed_next->ed_prev = ed->ed_prev;
if (ahcd->ed_tails[ed->type] == ed)
ahcd->ed_tails[ed->type] = ed->ed_prev;
}
/*-------------------------------------------------------------------------*/
static struct ed *ed_create(struct admhcd *ahcd, unsigned int type, u32 info)
{
struct ed *ed;
struct td *td;
ed = ed_alloc(ahcd, GFP_ATOMIC);
if (!ed)
goto err;
/* dummy td; end of td list for this ed */
td = td_alloc(ahcd, GFP_ATOMIC);
if (!td)
goto err_free_ed;
switch (type) {
case PIPE_INTERRUPT:
info |= ED_INT;
break;
case PIPE_ISOCHRONOUS:
info |= ED_ISO;
break;
}
ed->dummy = td;
ed->state = ED_IDLE;
ed->type = type;
ed->hwINFO = cpu_to_hc32(ahcd, info);
ed->hwTailP = cpu_to_hc32(ahcd, td->td_dma);
ed->hwHeadP = ed->hwTailP; /* ED_C, ED_H zeroed */
return ed;
err_free_ed:
ed_free(ahcd, ed);
err:
return NULL;
}
/* get and maybe (re)init an endpoint. init _should_ be done only as part
* of enumeration, usb_set_configuration() or usb_set_interface().
*/
static struct ed *ed_get(struct admhcd *ahcd, struct usb_host_endpoint *ep,
struct usb_device *udev, unsigned int pipe, int interval)
{
struct ed *ed;
unsigned long flags;
spin_lock_irqsave(&ahcd->lock, flags);
ed = ep->hcpriv;
if (!ed) {
u32 info;
/* FIXME: usbcore changes dev->devnum before SET_ADDRESS
* suceeds ... otherwise we wouldn't need "pipe".
*/
info = usb_pipedevice(pipe);
info |= (ep->desc.bEndpointAddress & ~USB_DIR_IN) << ED_EN_SHIFT;
info |= le16_to_cpu(ep->desc.wMaxPacketSize) << ED_MPS_SHIFT;
if (udev->speed == USB_SPEED_FULL)
info |= ED_SPEED_FULL;
ed = ed_create(ahcd, usb_pipetype(pipe), info);
if (ed)
ep->hcpriv = ed;
}
spin_unlock_irqrestore(&ahcd->lock, flags);
return ed;
}
/*-------------------------------------------------------------------------*/
/* request unlinking of an endpoint from an operational HC.
* put the ep on the rm_list
* real work is done at the next start frame (SOFI) hardware interrupt
* caller guarantees HCD is running, so hardware access is safe,
* and that ed->state is ED_OPER
*/
static void start_ed_unlink(struct admhcd *ahcd, struct ed *ed)
{
#ifdef ADMHC_VERBOSE_DEBUG
admhc_dump_ed(ahcd, "ED-UNLINK", ed, 1);
#endif
ed->hwINFO |= cpu_to_hc32(ahcd, ED_DEQUEUE);
ed_deschedule(ahcd, ed);
/* add this ED into the remove list */
ed->ed_rm_next = ahcd->ed_rm_list;
ahcd->ed_rm_list = ed;
/* enable SOF interrupt */
admhc_intr_ack(ahcd, ADMHC_INTR_SOFI);
admhc_intr_enable(ahcd, ADMHC_INTR_SOFI);
/* flush those writes */
admhc_writel_flush(ahcd);
/* SOF interrupt might get delayed; record the frame counter value that
* indicates when the HC isn't looking at it, so concurrent unlinks
* behave. frame_no wraps every 2^16 msec, and changes right before
* SOF is triggered.
*/
ed->tick = admhc_frame_no(ahcd) + 1;
}
/*-------------------------------------------------------------------------*
* TD handling functions
*-------------------------------------------------------------------------*/
/* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
static void
td_fill(struct admhcd *ahcd, u32 info, dma_addr_t data, int len,
struct urb *urb, int index)
{
struct td *td, *td_pt;
struct urb_priv *urb_priv = urb->hcpriv;
int hash;
u32 cbl = 0;
#if 1
if (index == (urb_priv->td_cnt - 1) &&
((urb->transfer_flags & URB_NO_INTERRUPT) == 0))
cbl |= TD_IE;
#else
if (index == (urb_priv->td_cnt - 1))
cbl |= TD_IE;
#endif
/* use this td as the next dummy */
td_pt = urb_priv->td[index];
/* fill the old dummy TD */
td = urb_priv->td[index] = urb_priv->ed->dummy;
urb_priv->ed->dummy = td_pt;
td->ed = urb_priv->ed;
td->next_dl_td = NULL;
td->index = index;
td->urb = urb;
td->data_dma = data;
if (!len)
data = 0;
if (data)
cbl |= (len & TD_BL_MASK);
info |= TD_OWN;
/* setup hardware specific fields */
td->hwINFO = cpu_to_hc32(ahcd, info);
td->hwDBP = cpu_to_hc32(ahcd, data);
td->hwCBL = cpu_to_hc32(ahcd, cbl);
td->hwNextTD = cpu_to_hc32(ahcd, td_pt->td_dma);
/* append to queue */
list_add_tail(&td->td_list, &td->ed->td_list);
/* hash it for later reverse mapping */
hash = TD_HASH_FUNC(td->td_dma);
td->td_hash = ahcd->td_hash[hash];
ahcd->td_hash[hash] = td;
/* HC might read the TD (or cachelines) right away ... */
wmb();
td->ed->hwTailP = td->hwNextTD;
}
/*-------------------------------------------------------------------------*/
/* Prepare all TDs of a transfer, and queue them onto the ED.
* Caller guarantees HC is active.
* Usually the ED is already on the schedule, so TDs might be
* processed as soon as they're queued.
*/
static void td_submit_urb(struct admhcd *ahcd, struct urb *urb)
{
struct urb_priv *urb_priv = urb->hcpriv;
dma_addr_t data;
int data_len = urb->transfer_buffer_length;
int cnt = 0;
u32 info = 0;
int is_out = usb_pipeout(urb->pipe);
u32 toggle = 0;
/* OHCI handles the bulk/interrupt data toggles itself. We just
* use the device toggle bits for resetting, and rely on the fact
* that resetting toggle is meaningless if the endpoint is active.
*/
if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), is_out)) {
toggle = TD_T_CARRY;
} else {
toggle = TD_T_DATA0;
usb_settoggle(urb->dev, usb_pipeendpoint (urb->pipe),
is_out, 1);
}
urb_priv->td_idx = 0;
list_add(&urb_priv->pending, &ahcd->pending);
if (data_len)
data = urb->transfer_dma;
else
data = 0;
/* NOTE: TD_CC is set so we can tell which TDs the HC processed by
* using TD_CC_GET, as well as by seeing them on the done list.
* (CC = NotAccessed ... 0x0F, or 0x0E in PSWs for ISO.)
*/
switch (urb_priv->ed->type) {
case PIPE_INTERRUPT:
info = is_out
? TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_OUT
: TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_IN;
/* setup service interval and starting frame number */
info |= (urb->start_frame & TD_FN_MASK);
info |= (urb->interval & TD_ISI_MASK) << TD_ISI_SHIFT;
td_fill(ahcd, info, data, data_len, urb, cnt);
cnt++;
admhcd_to_hcd(ahcd)->self.bandwidth_int_reqs++;
break;
case PIPE_BULK:
info = is_out
? TD_SCC_NOTACCESSED | TD_DP_OUT
: TD_SCC_NOTACCESSED | TD_DP_IN;
/* TDs _could_ transfer up to 8K each */
while (data_len > TD_DATALEN_MAX) {
td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle),
data, TD_DATALEN_MAX, urb, cnt);
data += TD_DATALEN_MAX;
data_len -= TD_DATALEN_MAX;
cnt++;
}
td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle), data,
data_len, urb, cnt);
cnt++;
if ((urb->transfer_flags & URB_ZERO_PACKET)
&& (cnt < urb_priv->td_cnt)) {
td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle),
0, 0, urb, cnt);
cnt++;
}
break;
/* control manages DATA0/DATA1 toggle per-request; SETUP resets it,
* any DATA phase works normally, and the STATUS ack is special.
*/
case PIPE_CONTROL:
/* fill a TD for the setup */
info = TD_SCC_NOTACCESSED | TD_DP_SETUP | TD_T_DATA0;
td_fill(ahcd, info, urb->setup_dma, 8, urb, cnt++);
if (data_len > 0) {
/* fill a TD for the data */
info = TD_SCC_NOTACCESSED | TD_T_DATA1;
info |= is_out ? TD_DP_OUT : TD_DP_IN;
/* NOTE: mishandles transfers >8K, some >4K */
td_fill(ahcd, info, data, data_len, urb, cnt++);
}
/* fill a TD for the ACK */
info = (is_out || data_len == 0)
? TD_SCC_NOTACCESSED | TD_DP_IN | TD_T_DATA1
: TD_SCC_NOTACCESSED | TD_DP_OUT | TD_T_DATA1;
td_fill(ahcd, info, data, 0, urb, cnt++);
break;
/* ISO has no retransmit, so no toggle;
* Each TD could handle multiple consecutive frames (interval 1);
* we could often reduce the number of TDs here.
*/
case PIPE_ISOCHRONOUS:
info = is_out
? TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_OUT
: TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_IN;
for (cnt = 0; cnt < urb->number_of_packets; cnt++) {
int frame = urb->start_frame;
frame += cnt * urb->interval;
frame &= TD_FN_MASK;
td_fill(ahcd, info | frame,
data + urb->iso_frame_desc[cnt].offset,
urb->iso_frame_desc[cnt].length, urb, cnt);
}
admhcd_to_hcd(ahcd)->self.bandwidth_isoc_reqs++;
break;
}
if (urb_priv->td_cnt != cnt)
admhc_err(ahcd, "bad number of tds created for urb %p\n", urb);
}
/*-------------------------------------------------------------------------*
* Done List handling functions
*-------------------------------------------------------------------------*/
/* calculate transfer length/status and update the urb */
static int td_done(struct admhcd *ahcd, struct urb *urb, struct td *td)
{
struct urb_priv *urb_priv = urb->hcpriv;
u32 info;
u32 bl;
u32 tdDBP;
int type = usb_pipetype(urb->pipe);
int cc;
int status = -EINPROGRESS;
info = hc32_to_cpup(ahcd, &td->hwINFO);
tdDBP = hc32_to_cpup(ahcd, &td->hwDBP);
bl = TD_BL_GET(hc32_to_cpup(ahcd, &td->hwCBL));
cc = TD_CC_GET(info);
/* ISO ... drivers see per-TD length/status */
if (type == PIPE_ISOCHRONOUS) {
/* TODO */
int dlen = 0;
/* NOTE: assumes FC in tdINFO == 0, and that
* only the first of 0..MAXPSW psws is used.
*/
if (info & TD_CC) /* hc didn't touch? */
return status;
if (usb_pipeout(urb->pipe))
dlen = urb->iso_frame_desc[td->index].length;
else {
/* short reads are always OK for ISO */
if (cc == TD_CC_DATAUNDERRUN)
cc = TD_CC_NOERROR;
dlen = tdDBP - td->data_dma + bl;
}
urb->actual_length += dlen;
urb->iso_frame_desc[td->index].actual_length = dlen;
urb->iso_frame_desc[td->index].status = cc_to_error[cc];
if (cc != TD_CC_NOERROR)
admhc_vdbg (ahcd,
"urb %p iso td %p (%d) len %d cc %d\n",
urb, td, 1 + td->index, dlen, cc);
/* BULK, INT, CONTROL ... drivers see aggregate length/status,
* except that "setup" bytes aren't counted and "short" transfers
* might not be reported as errors.
*/
} else {
/* update packet status if needed (short is normally ok) */
if (cc == TD_CC_DATAUNDERRUN
&& !(urb->transfer_flags & URB_SHORT_NOT_OK))
cc = TD_CC_NOERROR;
if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0)
status = cc_to_error[cc];
/* count all non-empty packets except control SETUP packet */
if ((type != PIPE_CONTROL || td->index != 0) && tdDBP != 0) {
urb->actual_length += tdDBP - td->data_dma + bl;
}
if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0)
admhc_vdbg(ahcd,
"urb %p td %p (%d) cc %d, len=%d/%d\n",
urb, td, td->index, cc,
urb->actual_length,
urb->transfer_buffer_length);
}
list_del(&td->td_list);
urb_priv->td_idx++;
return status;
}
/*-------------------------------------------------------------------------*/
static inline void
ed_halted(struct admhcd *ahcd, struct td *td, int cc, struct td *rev)
{
struct urb *urb = td->urb;
struct urb_priv *urb_priv = urb->hcpriv;
struct ed *ed = td->ed;
struct list_head *tmp = td->td_list.next;
__hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C);
admhc_dump_ed(ahcd, "ed halted", td->ed, 1);
/* clear ed halt; this is the td that caused it, but keep it inactive
* until its urb->complete() has a chance to clean up.
*/
ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP);
wmb();
ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H);
/* Get rid of all later tds from this urb. We don't have
* to be careful: no errors and nothing was transferred.
* Also patch the ed so it looks as if those tds completed normally.
*/
while (tmp != &ed->td_list) {
struct td *next;
next = list_entry(tmp, struct td, td_list);
tmp = next->td_list.next;
if (next->urb != urb)
break;
/* NOTE: if multi-td control DATA segments get supported,
* this urb had one of them, this td wasn't the last td
* in that segment (TD_R clear), this ed halted because
* of a short read, _and_ URB_SHORT_NOT_OK is clear ...
* then we need to leave the control STATUS packet queued
* and clear ED_SKIP.
*/
list_del(&next->td_list);
urb_priv->td_cnt++;
ed->hwHeadP = next->hwNextTD | toggle;
}
/* help for troubleshooting: report anything that
* looks odd ... that doesn't include protocol stalls
* (or maybe some other things)
*/
switch (cc) {
case TD_CC_DATAUNDERRUN:
if ((urb->transfer_flags & URB_SHORT_NOT_OK) == 0)
break;
/* fallthrough */
case TD_CC_STALL:
if (usb_pipecontrol(urb->pipe))
break;
/* fallthrough */
default:
admhc_dbg (ahcd,
"urb %p path %s ep%d%s %08x cc %d --> status %d\n",
urb, urb->dev->devpath,
usb_pipeendpoint (urb->pipe),
usb_pipein (urb->pipe) ? "in" : "out",
hc32_to_cpu(ahcd, td->hwINFO),
cc, cc_to_error [cc]);
}
}
/*-------------------------------------------------------------------------*/
/* there are some urbs/eds to unlink; called in_irq(), with HCD locked */
static void
finish_unlinks(struct admhcd *ahcd, u16 tick)
{
struct ed *ed, **last;
rescan_all:
for (last = &ahcd->ed_rm_list, ed = *last; ed != NULL; ed = *last) {
struct list_head *entry, *tmp;
int completed, modified;
__hc32 *prev;
/* only take off EDs that the HC isn't using, accounting for
* frame counter wraps and EDs with partially retired TDs
*/
if (likely(HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state))) {
if (tick_before (tick, ed->tick)) {
skip_ed:
last = &ed->ed_rm_next;
continue;
}
#if 0
if (!list_empty(&ed->td_list)) {
struct td *td;
u32 head;
td = list_entry(ed->td_list.next, struct td,
td_list);
head = hc32_to_cpu(ahcd, ed->hwHeadP) &
TD_MASK;
/* INTR_WDH may need to clean up first */
if (td->td_dma != head)
goto skip_ed;
}
#endif
}
/* reentrancy: if we drop the schedule lock, someone might
* have modified this list. normally it's just prepending
* entries (which we'd ignore), but paranoia won't hurt.
*/
*last = ed->ed_rm_next;
ed->ed_rm_next = NULL;
modified = 0;
/* unlink urbs as requested, but rescan the list after
* we call a completion since it might have unlinked
* another (earlier) urb
*
* When we get here, the HC doesn't see this ed. But it
* must not be rescheduled until all completed URBs have
* been given back to the driver.
*/
rescan_this:
completed = 0;
prev = &ed->hwHeadP;
list_for_each_safe(entry, tmp, &ed->td_list) {
struct td *td;
struct urb *urb;
struct urb_priv *urb_priv;
__hc32 savebits;
int status;
td = list_entry(entry, struct td, td_list);
urb = td->urb;
urb_priv = td->urb->hcpriv;
if (!urb->unlinked) {
prev = &td->hwNextTD;
continue;
}
if ((urb_priv) == NULL)
continue;
/* patch pointer hc uses */
savebits = *prev & ~cpu_to_hc32(ahcd, TD_MASK);
*prev = td->hwNextTD | savebits;
/* HC may have partly processed this TD */
#ifdef ADMHC_VERBOSE_DEBUG
urb_print(ahcd, urb, "PARTIAL", 0);
#endif
status = td_done(ahcd, urb, td);
/* if URB is done, clean up */
if (urb_priv->td_idx == urb_priv->td_cnt) {
modified = completed = 1;
finish_urb(ahcd, urb, status);
}
}
if (completed && !list_empty(&ed->td_list))
goto rescan_this;
/* ED's now officially unlinked, hc doesn't see */
ed->state = ED_IDLE;
ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H);
ed->hwNextED = 0;
wmb();
ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP | ED_DEQUEUE);
/* but if there's work queued, reschedule */
if (!list_empty(&ed->td_list)) {
if (HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state))
ed_schedule(ahcd, ed);
}
if (modified)
goto rescan_all;
}
}
/*-------------------------------------------------------------------------*/
/*
* Process normal completions (error or success) and clean the schedules.
*
* This is the main path for handing urbs back to drivers. The only other
* path is finish_unlinks(), which unlinks URBs using ed_rm_list, instead of
* scanning the (re-reversed) donelist as this does.
*/
static void ed_unhalt(struct admhcd *ahcd, struct ed *ed, struct urb *urb)
{
struct list_head *entry,*tmp;
__hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C);
#ifdef ADMHC_VERBOSE_DEBUG
admhc_dump_ed(ahcd, "UNHALT", ed, 0);
#endif
/* clear ed halt; this is the td that caused it, but keep it inactive
* until its urb->complete() has a chance to clean up.
*/
ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP);
wmb();
ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H);
list_for_each_safe(entry, tmp, &ed->td_list) {
struct td *td = list_entry(entry, struct td, td_list);
__hc32 info;
if (td->urb != urb)
break;
info = td->hwINFO;
info &= ~cpu_to_hc32(ahcd, TD_CC | TD_OWN);
td->hwINFO = info;
ed->hwHeadP = td->hwNextTD | toggle;
wmb();
}
}
static void ed_intr_refill(struct admhcd *ahcd, struct ed *ed)
{
__hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C);
ed->hwHeadP = ed->hwTailP | toggle;
}
static inline int is_ed_halted(struct admhcd *ahcd, struct ed *ed)
{
return ((hc32_to_cpup(ahcd, &ed->hwHeadP) & ED_H) == ED_H);
}
static inline int is_td_halted(struct admhcd *ahcd, struct ed *ed,
struct td *td)
{
return ((hc32_to_cpup(ahcd, &ed->hwHeadP) & TD_MASK) ==
(hc32_to_cpup(ahcd, &td->hwNextTD) & TD_MASK));
}
static void ed_update(struct admhcd *ahcd, struct ed *ed)
{
struct list_head *entry,*tmp;
#ifdef ADMHC_VERBOSE_DEBUG
admhc_dump_ed(ahcd, "UPDATE", ed, 1);
#endif
list_for_each_safe(entry, tmp, &ed->td_list) {
struct td *td = list_entry(entry, struct td, td_list);
struct urb *urb = td->urb;
struct urb_priv *urb_priv = urb->hcpriv;
int status;
if (hc32_to_cpup(ahcd, &td->hwINFO) & TD_OWN)
break;
/* update URB's length and status from TD */
status = td_done(ahcd, urb, td);
if (is_ed_halted(ahcd, ed) && is_td_halted(ahcd, ed, td))
ed_unhalt(ahcd, ed, urb);
if (ed->type == PIPE_INTERRUPT)
ed_intr_refill(ahcd,ed);
/* If all this urb's TDs are done, call complete() */
if (urb_priv->td_idx == urb_priv->td_cnt)
finish_urb(ahcd, urb, status);
/* clean schedule: unlink EDs that are no longer busy */
if (list_empty(&ed->td_list)) {
if (ed->state == ED_OPER)
start_ed_unlink(ahcd, ed);
/* ... reenabling halted EDs only after fault cleanup */
} else if ((ed->hwINFO & cpu_to_hc32(ahcd,
ED_SKIP | ED_DEQUEUE))
== cpu_to_hc32(ahcd, ED_SKIP)) {
td = list_entry(ed->td_list.next, struct td, td_list);
#if 0
if (!(td->hwINFO & cpu_to_hc32(ahcd, TD_DONE))) {
ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP);
/* ... hc may need waking-up */
switch (ed->type) {
case PIPE_CONTROL:
admhc_writel (ahcd, OHCI_CLF,
&ahcd->regs->cmdstatus);
break;
case PIPE_BULK:
admhc_writel (ahcd, OHCI_BLF,
&ahcd->regs->cmdstatus);
break;
}
}
#else
if ((td->hwINFO & cpu_to_hc32(ahcd, TD_OWN)))
ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP);
#endif
}
}
}
/* there are some tds completed; called in_irq(), with HCD locked */
static void admhc_td_complete(struct admhcd *ahcd)
{
struct ed *ed;
for (ed = ahcd->ed_head; ed; ed = ed->ed_next) {
if (ed->state != ED_OPER)
continue;
ed_update(ahcd, ed);
}
}

762
target/linux/adm5120/files/drivers/usb/host/adm5120.h
View File

@@ -1,762 +0,0 @@
/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci.h
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
/*
* __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
* __leXX (normally) or __beXX (given OHCI_BIG_ENDIAN), depending on the
* host controller implementation.
*/
typedef __u32 __bitwise __hc32;
typedef __u16 __bitwise __hc16;
/*
* OHCI Endpoint Descriptor (ED) ... holds TD queue
* See OHCI spec, section 4.2
*
* This is a "Queue Head" for those transfers, which is why
* both EHCI and UHCI call similar structures a "QH".
*/
#define TD_DATALEN_MAX 4096
#define ED_ALIGN 16
#define ED_MASK ((u32)~(ED_ALIGN-1)) /* strip hw status in low addr bits */
struct ed {
/* first fields are hardware-specified */
__hc32 hwINFO; /* endpoint config bitmap */
/* info bits defined by hcd */
#define ED_DEQUEUE (1 << 27)
/* info bits defined by the hardware */
#define ED_MPS_SHIFT 16
#define ED_MPS_MASK ((1 << 11)-1)
#define ED_MPS_GET(x) (((x) >> ED_MPS_SHIFT) & ED_MPS_MASK)
#define ED_ISO (1 << 15) /* isochronous endpoint */
#define ED_SKIP (1 << 14)
#define ED_SPEED_FULL (1 << 13) /* fullspeed device */
#define ED_INT (1 << 11) /* interrupt endpoint */
#define ED_EN_SHIFT 7 /* endpoint shift */
#define ED_EN_MASK ((1 << 4)-1) /* endpoint mask */
#define ED_EN_GET(x) (((x) >> ED_EN_SHIFT) & ED_EN_MASK)
#define ED_FA_MASK ((1 << 7)-1) /* function address mask */
#define ED_FA_GET(x) ((x) & ED_FA_MASK)
__hc32 hwTailP; /* tail of TD list */
__hc32 hwHeadP; /* head of TD list (hc r/w) */
#define ED_C (0x02) /* toggle carry */
#define ED_H (0x01) /* halted */
__hc32 hwNextED; /* next ED in list */
/* rest are purely for the driver's use */
dma_addr_t dma; /* addr of ED */
struct td *dummy; /* next TD to activate */
struct list_head urb_list; /* list of our URBs */
/* host's view of schedule */
struct ed *ed_next; /* on schedule list */
struct ed *ed_prev; /* for non-interrupt EDs */
struct ed *ed_rm_next; /* on rm list */
struct list_head td_list; /* "shadow list" of our TDs */
/* create --> IDLE --> OPER --> ... --> IDLE --> destroy
* usually: OPER --> UNLINK --> (IDLE | OPER) --> ...
*/
u8 state; /* ED_{IDLE,UNLINK,OPER} */
#define ED_IDLE 0x00 /* NOT linked to HC */
#define ED_UNLINK 0x01 /* being unlinked from hc */
#define ED_OPER 0x02 /* IS linked to hc */
u8 type; /* PIPE_{BULK,...} */
/* periodic scheduling params (for intr and iso) */
u8 branch;
u16 interval;
u16 load;
u16 last_iso; /* iso only */
/* HC may see EDs on rm_list until next frame (frame_no == tick) */
u16 tick;
} __attribute__ ((aligned(ED_ALIGN)));
/*
* OHCI Transfer Descriptor (TD) ... one per transfer segment
* See OHCI spec, sections 4.3.1 (general = control/bulk/interrupt)
* and 4.3.2 (iso)
*/
#define TD_ALIGN 32
#define TD_MASK ((u32)~(TD_ALIGN-1)) /* strip hw status in low addr bits */
struct td {
/* first fields are hardware-specified */
__hc32 hwINFO; /* transfer info bitmask */
/* hwINFO bits */
#define TD_OWN (1 << 31) /* owner of the descriptor */
#define TD_CC_SHIFT 27 /* condition code */
#define TD_CC_MASK 0xf
#define TD_CC (TD_CC_MASK << TD_CC_SHIFT)
#define TD_CC_GET(x) (((x) >> TD_CC_SHIFT) & TD_CC_MASK)
#define TD_EC_SHIFT 25 /* error count */
#define TD_EC_MASK 0x3
#define TD_EC (TD_EC_MASK << TD_EC_SHIFT)
#define TD_EC_GET(x) ((x >> TD_EC_SHIFT) & TD_EC_MASK)
#define TD_T_SHIFT 23 /* data toggle state */
#define TD_T_MASK 0x3
#define TD_T (TD_T_MASK << TD_T_SHIFT)
#define TD_T_DATA0 (0x2 << TD_T_SHIFT) /* DATA0 */
#define TD_T_DATA1 (0x3 << TD_T_SHIFT) /* DATA1 */
#define TD_T_CARRY (0x0 << TD_T_SHIFT) /* uses ED_C */
#define TD_T_GET(x) (((x) >> TD_T_SHIFT) & TD_T_MASK)
#define TD_DP_SHIFT 21 /* direction/pid */
#define TD_DP_MASK 0x3
#define TD_DP (TD_DP_MASK << TD_DP_SHIFT)
#define TD_DP_GET (((x) >> TD_DP_SHIFT) & TD_DP_MASK)
#define TD_DP_SETUP (0x0 << TD_DP_SHIFT) /* SETUP pid */
#define TD_DP_OUT (0x1 << TD_DP_SHIFT) /* OUT pid */
#define TD_DP_IN (0x2 << TD_DP_SHIFT) /* IN pid */
#define TD_ISI_SHIFT 8 /* Interrupt Service Interval */
#define TD_ISI_MASK 0x3f
#define TD_ISI_GET(x) (((x) >> TD_ISI_SHIFT) & TD_ISI_MASK)
#define TD_FN_MASK 0x3f /* frame number */
#define TD_FN_GET(x) ((x) & TD_FN_MASK)
__hc32 hwDBP; /* Data Buffer Pointer (or 0) */
__hc32 hwCBL; /* Controller/Buffer Length */
/* hwCBL bits */
#define TD_BL_MASK 0xffff /* buffer length */
#define TD_BL_GET(x) ((x) & TD_BL_MASK)
#define TD_IE (1 << 16) /* interrupt enable */
__hc32 hwNextTD; /* Next TD Pointer */
/* rest are purely for the driver's use */
__u8 index;
struct ed *ed;
struct td *td_hash; /* dma-->td hashtable */
struct td *next_dl_td;
struct urb *urb;
dma_addr_t td_dma; /* addr of this TD */
dma_addr_t data_dma; /* addr of data it points to */
struct list_head td_list; /* "shadow list", TDs on same ED */
u32 flags;
#define TD_FLAG_DONE (1 << 17) /* retired to done list */
#define TD_FLAG_ISO (1 << 16) /* copy of ED_ISO */
} __attribute__ ((aligned(TD_ALIGN))); /* c/b/i need 16; only iso needs 32 */
/*
* Hardware transfer status codes -- CC from td->hwINFO
*/
#define TD_CC_NOERROR 0x00
#define TD_CC_CRC 0x01
#define TD_CC_BITSTUFFING 0x02
#define TD_CC_DATATOGGLEM 0x03
#define TD_CC_STALL 0x04
#define TD_CC_DEVNOTRESP 0x05
#define TD_CC_PIDCHECKFAIL 0x06
#define TD_CC_UNEXPECTEDPID 0x07
#define TD_CC_DATAOVERRUN 0x08
#define TD_CC_DATAUNDERRUN 0x09
/* 0x0A, 0x0B reserved for hardware */
#define TD_CC_BUFFEROVERRUN 0x0C
#define TD_CC_BUFFERUNDERRUN 0x0D
/* 0x0E, 0x0F reserved for HCD */
#define TD_CC_HCD0 0x0E
#define TD_CC_NOTACCESSED 0x0F
/*
* preshifted status codes
*/
#define TD_SCC_NOTACCESSED (TD_CC_NOTACCESSED << TD_CC_SHIFT)
/* map OHCI TD status codes (CC) to errno values */
static const int cc_to_error [16] = {
/* No Error */ 0,
/* CRC Error */ -EILSEQ,
/* Bit Stuff */ -EPROTO,
/* Data Togg */ -EILSEQ,
/* Stall */ -EPIPE,
/* DevNotResp */ -ETIME,
/* PIDCheck */ -EPROTO,
/* UnExpPID */ -EPROTO,
/* DataOver */ -EOVERFLOW,
/* DataUnder */ -EREMOTEIO,
/* (for hw) */ -EIO,
/* (for hw) */ -EIO,
/* BufferOver */ -ECOMM,
/* BuffUnder */ -ENOSR,
/* (for HCD) */ -EALREADY,
/* (for HCD) */ -EALREADY
};
#define NUM_INTS 32
/*
* This is the structure of the OHCI controller's memory mapped I/O region.
* You must use readl() and writel() (in <asm/io.h>) to access these fields!!
* Layout is in section 7 (and appendix B) of the spec.
*/
struct admhcd_regs {
__hc32 gencontrol; /* General Control */
__hc32 int_status; /* Interrupt Status */
__hc32 int_enable; /* Interrupt Enable */
__hc32 reserved00;
__hc32 host_control; /* Host General Control */
__hc32 reserved01;
__hc32 fminterval; /* Frame Interval */
__hc32 fmnumber; /* Frame Number */
__hc32 reserved02;
__hc32 reserved03;
__hc32 reserved04;
__hc32 reserved05;
__hc32 reserved06;
__hc32 reserved07;
__hc32 reserved08;
__hc32 reserved09;
__hc32 reserved10;
__hc32 reserved11;
__hc32 reserved12;
__hc32 reserved13;
__hc32 reserved14;
__hc32 reserved15;
__hc32 reserved16;
__hc32 reserved17;
__hc32 reserved18;
__hc32 reserved19;
__hc32 reserved20;
__hc32 reserved21;
__hc32 lsthresh; /* Low Speed Threshold */
__hc32 rhdesc; /* Root Hub Descriptor */
#define MAX_ROOT_PORTS 2
__hc32 portstatus[MAX_ROOT_PORTS]; /* Port Status */
__hc32 hosthead; /* Host Descriptor Head */
} __attribute__ ((aligned(32)));
/*
* General Control register bits
*/
#define ADMHC_CTRL_UHFE (1 << 0) /* USB Host Function Enable */
#define ADMHC_CTRL_SIR (1 << 1) /* Software Interrupt request */
#define ADMHC_CTRL_DMAA (1 << 2) /* DMA Arbitration Control */
#define ADMHC_CTRL_SR (1 << 3) /* Software Reset */
/*
* Host General Control register bits
*/
#define ADMHC_HC_BUSS 0x3 /* USB bus state */
#define ADMHC_BUSS_RESET 0x0
#define ADMHC_BUSS_RESUME 0x1
#define ADMHC_BUSS_OPER 0x2
#define ADMHC_BUSS_SUSPEND 0x3
#define ADMHC_HC_DMAE (1 << 2) /* DMA enable */
/*
* Interrupt Status/Enable register bits
*/
#define ADMHC_INTR_SOFI (1 << 4) /* start of frame */
#define ADMHC_INTR_RESI (1 << 5) /* resume detected */
#define ADMHC_INTR_6 (1 << 6) /* unknown */
#define ADMHC_INTR_7 (1 << 7) /* unknown */
#define ADMHC_INTR_BABI (1 << 8) /* babble detected */
#define ADMHC_INTR_INSM (1 << 9) /* root hub status change */
#define ADMHC_INTR_SO (1 << 10) /* scheduling overrun */
#define ADMHC_INTR_FNO (1 << 11) /* frame number overflow */
#define ADMHC_INTR_TDC (1 << 20) /* transfer descriptor completed */
#define ADMHC_INTR_SWI (1 << 29) /* software interrupt */
#define ADMHC_INTR_FATI (1 << 30) /* fatal error */
#define ADMHC_INTR_INTA (1 << 31) /* interrupt active */
#define ADMHC_INTR_MIE (1 << 31) /* master interrupt enable */
/*
* SOF Frame Interval register bits
*/
#define ADMHC_SFI_FI_MASK ((1 << 14)-1) /* Frame Interval value */
#define ADMHC_SFI_FSLDP_SHIFT 16
#define ADMHC_SFI_FSLDP_MASK ((1 << 15)-1)
#define ADMHC_SFI_FIT (1 << 31) /* Frame Interval Toggle */
/*
* SOF Frame Number register bits
*/
#define ADMHC_SFN_FN_MASK ((1 << 16)-1) /* Frame Number Mask */
#define ADMHC_SFN_FR_SHIFT 16 /* Frame Remaining Shift */
#define ADMHC_SFN_FR_MASK ((1 << 14)-1) /* Frame Remaining Mask */
#define ADMHC_SFN_FRT (1 << 31) /* Frame Remaining Toggle */
/*
* Root Hub Descriptor register bits
*/
#define ADMHC_RH_NUMP 0xff /* number of ports */
#define ADMHC_RH_PSM (1 << 8) /* power switching mode */
#define ADMHC_RH_NPS (1 << 9) /* no power switching */
#define ADMHC_RH_OCPM (1 << 10) /* over current protection mode */
#define ADMHC_RH_NOCP (1 << 11) /* no over current protection */
#define ADMHC_RH_PPCM (0xff << 16) /* port power control */
#define ADMHC_RH_LPS (1 << 24) /* local power switch */
#define ADMHC_RH_OCI (1 << 25) /* over current indicator */
/* status change bits */
#define ADMHC_RH_LPSC (1 << 26) /* local power switch change */
#define ADMHC_RH_OCIC (1 << 27) /* over current indicator change */
#define ADMHC_RH_DRWE (1 << 28) /* device remote wakeup enable */
#define ADMHC_RH_CRWE (1 << 29) /* clear remote wakeup enable */
#define ADMHC_RH_CGP (1 << 24) /* clear global power */
#define ADMHC_RH_SGP (1 << 26) /* set global power */
/*
* Port Status register bits
*/
#define ADMHC_PS_CCS (1 << 0) /* current connect status */
#define ADMHC_PS_PES (1 << 1) /* port enable status */
#define ADMHC_PS_PSS (1 << 2) /* port suspend status */
#define ADMHC_PS_POCI (1 << 3) /* port over current indicator */
#define ADMHC_PS_PRS (1 << 4) /* port reset status */
#define ADMHC_PS_PPS (1 << 8) /* port power status */
#define ADMHC_PS_LSDA (1 << 9) /* low speed device attached */
/* status change bits */
#define ADMHC_PS_CSC (1 << 16) /* connect status change */
#define ADMHC_PS_PESC (1 << 17) /* port enable status change */
#define ADMHC_PS_PSSC (1 << 18) /* port suspend status change */
#define ADMHC_PS_OCIC (1 << 19) /* over current indicator change */
#define ADMHC_PS_PRSC (1 << 20) /* port reset status change */
/* port feature bits */
#define ADMHC_PS_CPE (1 << 0) /* clear port enable */
#define ADMHC_PS_SPE (1 << 1) /* set port enable */
#define ADMHC_PS_SPS (1 << 2) /* set port suspend */
#define ADMHC_PS_CPS (1 << 3) /* clear suspend status */
#define ADMHC_PS_SPR (1 << 4) /* set port reset */
#define ADMHC_PS_SPP (1 << 8) /* set port power */
#define ADMHC_PS_CPP (1 << 9) /* clear port power */
/*
* the POTPGT value is not defined in the ADMHC, so define a dummy value
*/
#define ADMHC_POTPGT 2 /* in ms */
/* hcd-private per-urb state */
struct urb_priv {
struct ed *ed;
struct list_head pending; /* URBs on the same ED */
u32 td_cnt; /* # tds in this request */
u32 td_idx; /* index of the current td */
struct td *td[0]; /* all TDs in this request */
};
#define TD_HASH_SIZE 64 /* power'o'two */
/* sizeof (struct td) ~= 64 == 2^6 ... */
#define TD_HASH_FUNC(td_dma) ((td_dma ^ (td_dma >> 6)) % TD_HASH_SIZE)
/*
* This is the full ADMHCD controller description
*
* Note how the "proper" USB information is just
* a subset of what the full implementation needs. (Linus)
*/
struct admhcd {
spinlock_t lock;
/*
* I/O memory used to communicate with the HC (dma-consistent)
*/
struct admhcd_regs __iomem *regs;
/*
* hcd adds to schedule for a live hc any time, but removals finish
* only at the start of the next frame.
*/
struct ed *ed_head;
struct ed *ed_tails[4];
struct ed *ed_rm_list; /* to be removed */
struct ed *periodic[NUM_INTS]; /* shadow int_table */
#if 0 /* TODO: remove? */
/*
* OTG controllers and transceivers need software interaction;
* other external transceivers should be software-transparent
*/
struct otg_transceiver *transceiver;
#endif
/*
* memory management for queue data structures
*/
struct dma_pool *td_cache;
struct dma_pool *ed_cache;
struct td *td_hash[TD_HASH_SIZE];
struct list_head pending;
/*
* driver state
*/
int num_ports;
int load[NUM_INTS];
u32 host_control; /* copy of the host_control reg */
unsigned long next_statechange; /* suspend/resume */
u32 fminterval; /* saved register */
unsigned autostop:1; /* rh auto stopping/stopped */
unsigned long flags; /* for HC bugs */
#define OHCI_QUIRK_AMD756 0x01 /* erratum #4 */
#define OHCI_QUIRK_SUPERIO 0x02 /* natsemi */
#define OHCI_QUIRK_INITRESET 0x04 /* SiS, OPTi, ... */
#define OHCI_QUIRK_BE_DESC 0x08 /* BE descriptors */
#define OHCI_QUIRK_BE_MMIO 0x10 /* BE registers */
#define OHCI_QUIRK_ZFMICRO 0x20 /* Compaq ZFMicro chipset*/
// there are also chip quirks/bugs in init logic
#ifdef DEBUG
struct dentry *debug_dir;
struct dentry *debug_async;
struct dentry *debug_periodic;
struct dentry *debug_registers;
#endif
};
/* convert between an hcd pointer and the corresponding ahcd_hcd */
static inline struct admhcd *hcd_to_admhcd(struct usb_hcd *hcd)
{
return (struct admhcd *)(hcd->hcd_priv);
}
static inline struct usb_hcd *admhcd_to_hcd(const struct admhcd *ahcd)
{
return container_of((void *)ahcd, struct usb_hcd, hcd_priv);
}
/*-------------------------------------------------------------------------*/
#ifndef DEBUG
#define STUB_DEBUG_FILES
#endif /* DEBUG */
#ifdef DEBUG
# define admhc_dbg(ahcd, fmt, args...) \
printk(KERN_DEBUG "adm5120-hcd: " fmt , ## args )
#else
# define admhc_dbg(ahcd, fmt, args...) do { } while (0)
#endif
#define admhc_err(ahcd, fmt, args...) \
printk(KERN_ERR "adm5120-hcd: " fmt , ## args )
#define admhc_info(ahcd, fmt, args...) \
printk(KERN_INFO "adm5120-hcd: " fmt , ## args )
#define admhc_warn(ahcd, fmt, args...) \
printk(KERN_WARNING "adm5120-hcd: " fmt , ## args )
#ifdef ADMHC_VERBOSE_DEBUG
# define admhc_vdbg admhc_dbg
#else
# define admhc_vdbg(ahcd, fmt, args...) do { } while (0)
#endif
/*-------------------------------------------------------------------------*/
/*
* While most USB host controllers implement their registers and
* in-memory communication descriptors in little-endian format,
* a minority (notably the IBM STB04XXX and the Motorola MPC5200
* processors) implement them in big endian format.
*
* In addition some more exotic implementations like the Toshiba
* Spider (aka SCC) cell southbridge are "mixed" endian, that is,
* they have a different endianness for registers vs. in-memory
* descriptors.
*
* This attempts to support either format at compile time without a
* runtime penalty, or both formats with the additional overhead
* of checking a flag bit.
*
* That leads to some tricky Kconfig rules howevber. There are
* different defaults based on some arch/ppc platforms, though
* the basic rules are:
*
* Controller type Kconfig options needed
* --------------- ----------------------
* little endian CONFIG_USB_ADMHC_LITTLE_ENDIAN
*
* fully big endian CONFIG_USB_ADMHC_BIG_ENDIAN_DESC _and_
* CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
*
* mixed endian CONFIG_USB_ADMHC_LITTLE_ENDIAN _and_
* CONFIG_USB_OHCI_BIG_ENDIAN_{MMIO,DESC}
*
* (If you have a mixed endian controller, you -must- also define
* CONFIG_USB_ADMHC_LITTLE_ENDIAN or things will not work when building
* both your mixed endian and a fully big endian controller support in
* the same kernel image).
*/
#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_DESC
#ifdef CONFIG_USB_ADMHC_LITTLE_ENDIAN
#define big_endian_desc(ahcd) (ahcd->flags & OHCI_QUIRK_BE_DESC)
#else
#define big_endian_desc(ahcd) 1 /* only big endian */
#endif
#else
#define big_endian_desc(ahcd) 0 /* only little endian */
#endif
#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
#ifdef CONFIG_USB_ADMHC_LITTLE_ENDIAN
#define big_endian_mmio(ahcd) (ahcd->flags & OHCI_QUIRK_BE_MMIO)
#else
#define big_endian_mmio(ahcd) 1 /* only big endian */
#endif
#else
#define big_endian_mmio(ahcd) 0 /* only little endian */
#endif
/*
* Big-endian read/write functions are arch-specific.
* Other arches can be added if/when they're needed.
*
* REVISIT: arch/powerpc now has readl/writel_be, so the
* definition below can die once the STB04xxx support is
* finally ported over.
*/
#if defined(CONFIG_PPC) && !defined(CONFIG_PPC_MERGE)
#define readl_be(addr) in_be32((__force unsigned *)addr)
#define writel_be(val, addr) out_be32((__force unsigned *)addr, val)
#endif
static inline unsigned int admhc_readl(const struct admhcd *ahcd,
__hc32 __iomem *regs)
{
#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
return big_endian_mmio(ahcd) ?
readl_be(regs) :
readl(regs);
#else
return readl(regs);
#endif
}
static inline void admhc_writel(const struct admhcd *ahcd,
const unsigned int val, __hc32 __iomem *regs)
{
#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
big_endian_mmio(ahcd) ?
writel_be(val, regs) :
writel(val, regs);
#else
writel(val, regs);
#endif
}
static inline void admhc_writel_flush(const struct admhcd *ahcd)
{
#if 0
/* TODO: remove? */
(void) admhc_readl(ahcd, &ahcd->regs->gencontrol);
#endif
}
/*-------------------------------------------------------------------------*/
/* cpu to ahcd */
static inline __hc16 cpu_to_hc16(const struct admhcd *ahcd, const u16 x)
{
return big_endian_desc(ahcd) ?
(__force __hc16)cpu_to_be16(x) :
(__force __hc16)cpu_to_le16(x);
}
static inline __hc16 cpu_to_hc16p(const struct admhcd *ahcd, const u16 *x)
{
return big_endian_desc(ahcd) ?
cpu_to_be16p(x) :
cpu_to_le16p(x);
}
static inline __hc32 cpu_to_hc32(const struct admhcd *ahcd, const u32 x)
{
return big_endian_desc(ahcd) ?
(__force __hc32)cpu_to_be32(x) :
(__force __hc32)cpu_to_le32(x);
}
static inline __hc32 cpu_to_hc32p(const struct admhcd *ahcd, const u32 *x)
{
return big_endian_desc(ahcd) ?
cpu_to_be32p(x) :
cpu_to_le32p(x);
}
/* ahcd to cpu */
static inline u16 hc16_to_cpu(const struct admhcd *ahcd, const __hc16 x)
{
return big_endian_desc(ahcd) ?
be16_to_cpu((__force __be16)x) :
le16_to_cpu((__force __le16)x);
}
static inline u16 hc16_to_cpup(const struct admhcd *ahcd, const __hc16 *x)
{
return big_endian_desc(ahcd) ?
be16_to_cpup((__force __be16 *)x) :
le16_to_cpup((__force __le16 *)x);
}
static inline u32 hc32_to_cpu(const struct admhcd *ahcd, const __hc32 x)
{
return big_endian_desc(ahcd) ?
be32_to_cpu((__force __be32)x) :
le32_to_cpu((__force __le32)x);
}
static inline u32 hc32_to_cpup(const struct admhcd *ahcd, const __hc32 *x)
{
return big_endian_desc(ahcd) ?
be32_to_cpup((__force __be32 *)x) :
le32_to_cpup((__force __le32 *)x);
}
/*-------------------------------------------------------------------------*/
static inline u16 admhc_frame_no(const struct admhcd *ahcd)
{
u32 t;
t = admhc_readl(ahcd, &ahcd->regs->fmnumber) & ADMHC_SFN_FN_MASK;
return (u16)t;
}
static inline u16 admhc_frame_remain(const struct admhcd *ahcd)
{
u32 t;
t = admhc_readl(ahcd, &ahcd->regs->fmnumber) >> ADMHC_SFN_FR_SHIFT;
t &= ADMHC_SFN_FR_MASK;
return (u16)t;
}
/*-------------------------------------------------------------------------*/
static inline void admhc_disable(struct admhcd *ahcd)
{
admhcd_to_hcd(ahcd)->state = HC_STATE_HALT;
}
#define FI 0x2edf /* 12000 bits per frame (-1) */
#define FSLDP(fi) (0x7fff & ((6 * ((fi) - 1200)) / 7))
#define FIT ADMHC_SFI_FIT
#define LSTHRESH 0x628 /* lowspeed bit threshold */
static inline void periodic_reinit(struct admhcd *ahcd)
{
#if 0
u32 fi = ahcd->fminterval & ADMHC_SFI_FI_MASK;
u32 fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT;
/* TODO: adjust FSLargestDataPacket value too? */
admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval,
&ahcd->regs->fminterval);
#else
u32 fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT;
/* TODO: adjust FSLargestDataPacket value too? */
admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval,
&ahcd->regs->fminterval);
#endif
}
static inline u32 admhc_read_rhdesc(struct admhcd *ahcd)
{
return admhc_readl(ahcd, &ahcd->regs->rhdesc);
}
static inline u32 admhc_read_portstatus(struct admhcd *ahcd, int port)
{
return admhc_readl(ahcd, &ahcd->regs->portstatus[port]);
}
static inline void admhc_write_portstatus(struct admhcd *ahcd, int port,
u32 value)
{
admhc_writel(ahcd, value, &ahcd->regs->portstatus[port]);
}
static inline void roothub_write_status(struct admhcd *ahcd, u32 value)
{
/* FIXME: read-only bits must be masked out */
admhc_writel(ahcd, value, &ahcd->regs->rhdesc);
}
static inline void admhc_intr_disable(struct admhcd *ahcd, u32 ints)
{
u32 t;
t = admhc_readl(ahcd, &ahcd->regs->int_enable);
t &= ~(ints);
admhc_writel(ahcd, t, &ahcd->regs->int_enable);
/* TODO: flush writes ?*/
}
static inline void admhc_intr_enable(struct admhcd *ahcd, u32 ints)
{
u32 t;
t = admhc_readl(ahcd, &ahcd->regs->int_enable);
t |= ints;
admhc_writel(ahcd, t, &ahcd->regs->int_enable);
/* TODO: flush writes ?*/
}
static inline void admhc_intr_ack(struct admhcd *ahcd, u32 ints)
{
admhc_writel(ahcd, ints, &ahcd->regs->int_status);
}
static inline void admhc_dma_enable(struct admhcd *ahcd)
{
u32 t;
t = admhc_readl(ahcd, &ahcd->regs->host_control);
if (t & ADMHC_HC_DMAE)
return;
t |= ADMHC_HC_DMAE;
admhc_writel(ahcd, t, &ahcd->regs->host_control);
admhc_vdbg(ahcd,"DMA enabled\n");
}
static inline void admhc_dma_disable(struct admhcd *ahcd)
{
u32 t;
t = admhc_readl(ahcd, &ahcd->regs->host_control);
if (!(t & ADMHC_HC_DMAE))
return;
t &= ~ADMHC_HC_DMAE;
admhc_writel(ahcd, t, &ahcd->regs->host_control);
admhc_vdbg(ahcd,"DMA disabled\n");
}