/*
* MUSB OTG driver debug support
*
* Copyright 2005 Mentor Graphics Corporation
* Copyright (C) 2005-2006 by Texas Instruments
* Copyright (C) 2006-2007 Nokia Corporation
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h> /* FIXME remove procfs writes */
#include <asm/arch/hardware.h>
#include "musb_core.h"
#include "davinci.h"
#ifdef CONFIG_USB_MUSB_HDRC_HCD
static int dump_qh(struct musb_qh *qh, char *buf, unsigned max)
{
int count;
int tmp;
struct usb_host_endpoint *hep = qh->hep;
struct urb *urb;
count = snprintf(buf, max, " qh %p dev%d ep%d%s max%d\n",
qh, qh->dev->devnum, qh->epnum,
({ char *s; switch (qh->type) {
case USB_ENDPOINT_XFER_BULK:
s = "-bulk"; break;
case USB_ENDPOINT_XFER_INT:
s = "-int"; break;
case USB_ENDPOINT_XFER_CONTROL:
s = ""; break;
default:
s = "iso"; break;
}; s; }),
qh->maxpacket);
if (count <= 0)
return 0;
buf += count;
max -= count;
list_for_each_entry(urb, &hep->urb_list, urb_list) {
tmp = snprintf(buf, max, "\t%s urb %p %d/%d\n",
usb_pipein(urb->pipe) ? "in" : "out",
urb, urb->actual_length,
urb->transfer_buffer_length);
if (tmp <= 0)
break;
tmp = min(tmp, (int)max);
count += tmp;
buf += tmp;
max -= tmp;
}
return count;
}
static int
dump_queue(struct list_head *q, char *buf, unsigned max)
{
int count = 0;
struct musb_qh *qh;
list_for_each_entry(qh, q, ring) {
int tmp;
tmp = dump_qh(qh, buf, max);
if (tmp <= 0)
break;
tmp = min(tmp, (int)max);
count += tmp;
buf += tmp;
max -= tmp;
}
return count;
}
#endif /* HCD */
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
static int dump_ep(struct musb_ep *ep, char *buffer, unsigned max)
{
char *buf = buffer;
int code = 0;
void __iomem *regs = ep->hw_ep->regs;
char *mode = "1buf";
if (ep->is_in) {
if (ep->hw_ep->tx_double_buffered)
mode = "2buf";
} else {
if (ep->hw_ep->rx_double_buffered)
mode = "2buf";
}
do {
struct usb_request *req;
code = snprintf(buf, max,
"\n%s (hw%d): %s%s, csr %04x maxp %04x\n",
ep->name, ep->current_epnum,
mode, ep->dma ? " dma" : "",
musb_readw(regs,
(ep->is_in || !ep->current_epnum)
? MUSB_TXCSR
: MUSB_RXCSR),
musb_readw(regs, ep->is_in
? MUSB_TXMAXP
: MUSB_RXMAXP)
);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
if (is_cppi_enabled() && ep->current_epnum) {
unsigned cppi = ep->current_epnum - 1;
void __iomem *base = ep->musb->ctrl_base;
unsigned off1 = cppi << 2;
void __iomem *ram = base;
char tmp[16];
if (ep->is_in) {
ram += DAVINCI_TXCPPI_STATERAM_OFFSET(cppi);
tmp[0] = 0;
} else {
ram += DAVINCI_RXCPPI_STATERAM_OFFSET(cppi);
snprintf(tmp, sizeof tmp, "%d left, ",
musb_readl(base,
DAVINCI_RXCPPI_BUFCNT0_REG + off1));
}
code = snprintf(buf, max, "%cX DMA%d: %s"
"%08x %08x, %08x %08x; "
"%08x %08x %08x .. %08x\n",
ep->is_in ? 'T' : 'R',
ep->current_epnum - 1, tmp,
musb_readl(ram, 0 * 4),
musb_readl(ram, 1 * 4),
musb_readl(ram, 2 * 4),
musb_readl(ram, 3 * 4),
musb_readl(ram, 4 * 4),
musb_readl(ram, 5 * 4),
musb_readl(ram, 6 * 4),
musb_readl(ram, 7 * 4));
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
if (list_empty(&ep->req_list)) {
code = snprintf(buf, max, "\t(queue empty)\n");
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
break;
}
list_for_each_entry(req, &ep->req_list, list) {
code = snprintf(buf, max, "\treq %p, %s%s%d/%d\n",
req,
req->zero ? "zero, " : "",
req->short_not_ok ? "!short, " : "",
req->actual, req->length);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
} while (0);
return buf - buffer;
}
#endif
static int
dump_end_info(struct musb *musb, u8 epnum, char *aBuffer, unsigned max)
{
int code = 0;
char *buf = aBuffer;
struct musb_hw_ep *hw_ep = &musb->endpoints[epnum];
do {
musb_ep_select(musb->mregs, epnum);
#ifdef CONFIG_USB_MUSB_HDRC_HCD
if (is_host_active(musb)) {
int dump_rx, dump_tx;
void __iomem *regs = hw_ep->regs;
/* TEMPORARY (!) until we have a real periodic
* schedule tree ...
*/
if (!epnum) {
/* control is shared, uses RX queue
* but (mostly) shadowed tx registers
*/
dump_tx = !list_empty(&musb->control);
dump_rx = 0;
} else if (hw_ep == musb->bulk_ep) {
dump_tx = !list_empty(&musb->out_bulk);
dump_rx = !list_empty(&musb->in_bulk);
} else if (musb->periodic[epnum]) {
struct usb_host_endpoint *hep;
hep = musb->periodic[epnum]->hep;
dump_rx = hep->desc.bEndpointAddress
& USB_ENDPOINT_DIR_MASK;
dump_tx = !dump_rx;
} else
break;
/* END TEMPORARY */
if (dump_rx) {
code = snprintf(buf, max,
"\nRX%d: %s rxcsr %04x interval %02x "
"max %04x type %02x; "
"dev %d hub %d port %d"
"\n",
epnum,
hw_ep->rx_double_buffered
? "2buf" : "1buf",
musb_readw(regs, MUSB_RXCSR),
musb_readb(regs, MUSB_RXINTERVAL),
musb_readw(regs, MUSB_RXMAXP),
musb_readb(regs, MUSB_RXTYPE),
/* FIXME: assumes multipoint */
musb_readb(musb->mregs,
MUSB_BUSCTL_OFFSET(epnum,
MUSB_RXFUNCADDR)),
musb_readb(musb->mregs,
MUSB_BUSCTL_OFFSET(epnum,
MUSB_RXHUBADDR)),
musb_readb(musb->mregs,
MUSB_BUSCTL_OFFSET(epnum,
MUSB_RXHUBPORT))
);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
if (is_cppi_enabled()
&& epnum
&& hw_ep->rx_channel) {
unsigned cppi = epnum - 1;
unsigned off1 = cppi << 2;
void __iomem *base;
void __iomem *ram;
char tmp[16];
base = musb->ctrl_base;
ram = DAVINCI_RXCPPI_STATERAM_OFFSET(
cppi) + base;
snprintf(tmp, sizeof tmp, "%d left, ",
musb_readl(base,
DAVINCI_RXCPPI_BUFCNT0_REG
+ off1));
code = snprintf(buf, max,
" rx dma%d: %s"
"%08x %08x, %08x %08x; "
"%08x %08x %08x .. %08x\n",
cppi, tmp,
musb_readl(ram, 0 * 4),
musb_readl(ram, 1 * 4),
musb_readl(ram, 2 * 4),
musb_readl(ram, 3 * 4),
musb_readl(ram, 4 * 4),
musb_readl(ram, 5 * 4),
musb_readl(ram, 6 * 4),
musb_readl(ram, 7 * 4));
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
if (hw_ep == musb->bulk_ep
&& !list_empty(
&musb->in_bulk)) {
code = dump_queue(&musb->in_bulk,
buf, max);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
} else if (musb->periodic[epnum]) {
code = dump_qh(musb->periodic[epnum],
buf, max);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
}
if (dump_tx) {
code = snprintf(buf, max,
"\nTX%d: %s txcsr %04x interval %02x "
"max %04x type %02x; "
"dev %d hub %d port %d"
"\n",
epnum,
hw_ep->tx_double_buffered
? "2buf" : "1buf",
musb_readw(regs, MUSB_TXCSR),
musb_readb(regs, MUSB_TXINTERVAL),
musb_readw(regs, MUSB_TXMAXP),
musb_readb(regs, MUSB_TXTYPE),
/* FIXME: assumes multipoint */
musb_readb(musb->mregs,
MUSB_BUSCTL_OFFSET(epnum,
MUSB_TXFUNCADDR)),
musb_readb(musb->mregs,
MUSB_BUSCTL_OFFSET(epnum,
MUSB_TXHUBADDR)),
musb_readb(musb->mregs,
MUSB_BUSCTL_OFFSET(epnum,
MUSB_TXHUBPORT))
);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
if (is_cppi_enabled()
&& epnum
&& hw_ep->tx_channel) {
unsigned cppi = epnum - 1;
void __iomem *base;
void __iomem *ram;
base = musb->ctrl_base;
ram = DAVINCI_RXCPPI_STATERAM_OFFSET(
cppi) + base;
code = snprintf(buf, max,
" tx dma%d: "
"%08x %08x, %08x %08x; "
"%08x %08x %08x .. %08x\n",
cppi,
musb_readl(ram, 0 * 4),
musb_readl(ram, 1 * 4),
musb_readl(ram, 2 * 4),
musb_readl(ram, 3 * 4),
musb_readl(ram, 4 * 4),
musb_readl(ram, 5 * 4),
musb_readl(ram, 6 * 4),
musb_readl(ram, 7 * 4));
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
if (hw_ep == musb->control_ep
&& !list_empty(
&musb->control)) {
code = dump_queue(&musb->control,
buf, max);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
} else if (hw_ep == musb->bulk_ep
&& !list_empty(
&musb->out_bulk)) {
code = dump_queue(&musb->out_bulk,
buf, max);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
} else if (musb->periodic[epnum]) {
code = dump_qh(musb->periodic[epnum],
buf, max);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
}
}
#endif
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
if (is_peripheral_active(musb)) {
code = 0;
if (hw_ep->ep_in.desc || !epnum) {
code = dump_ep(&hw_ep->ep_in, buf, max);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
if (hw_ep->ep_out.desc) {
code = dump_ep(&hw_ep->ep_out, buf, max);
if (code <= 0)
break;
code = min(code, (int) max);
buf += code;
max -= code;
}
}
#endif
} while (0);
return buf - aBuffer;
}
/* Dump the current status and compile options.
* @param musb the device driver instance
* @param buffer where to dump the status; it must be big enough to hold the
* result otherwise "BAD THINGS HAPPENS(TM)".
*/
static int dump_header_stats(struct musb *musb, char *buffer)
{
int code, count = 0;
const void __iomem *mbase = musb->mregs;
*buffer = 0;
count = sprintf(buffer, "Status: %sHDRC, Mode=%s "
"(Power=%02x, DevCtl=%02x)\n",
(musb->is_multipoint ? "M" : ""), MUSB_MODE(musb),
musb_readb(mbase, MUSB_POWER),
musb_readb(mbase, MUSB_DEVCTL));
if (count <= 0)
return 0;
buffer += count;
code = sprintf(buffer, "OTG state: %s; %sactive\n",
otg_state_string(musb),
musb->is_active ? "" : "in");
if (code <= 0)
goto done;
buffer += code;
count += code;
code = sprintf(buffer,
"Options: "
#ifdef CONFIG_MUSB_PIO_ONLY
"pio"
#elif defined(CONFIG_USB_TI_CPPI_DMA)
"cppi-dma"
#elif defined(CONFIG_USB_INVENTRA_DMA)
"musb-dma"
#elif defined(CONFIG_USB_TUSB_OMAP_DMA)
"tusb-omap-dma"
#else
"?dma?"
#endif
", "
#ifdef CONFIG_USB_MUSB_OTG
"otg (peripheral+host)"
#elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
"peripheral"
#elif defined(CONFIG_USB_MUSB_HDRC_HCD)
"host"
#endif
", debug=%d [eps=%d]\n",
debug,
musb->nr_endpoints);
if (code <= 0)
goto done;
count += code;
buffer += code;
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
code = sprintf(buffer, "Peripheral address: %02x\n",
musb_readb(musb->ctrl_base, MUSB_FADDR));
if (code <= 0)
goto done;
buffer += code;
count += code;
#endif
#ifdef CONFIG_USB_MUSB_HDRC_HCD
code = sprintf(buffer, "Root port status: %08x\n",
musb->port1_status);
if (code <= 0)
goto done;
buffer += code;
count += code;
#endif
#ifdef CONFIG_ARCH_DAVINCI
code = sprintf(buffer,
"DaVinci: ctrl=%02x stat=%1x phy=%03x\n"
"\trndis=%05x auto=%04x intsrc=%08x intmsk=%08x"
"\n",
musb_readl(musb->ctrl_base, DAVINCI_USB_CTRL_REG),
musb_readl(musb->ctrl_base, DAVINCI_USB_STAT_REG),
__raw_readl((void __force __iomem *)
IO_ADDRESS(USBPHY_CTL_PADDR)),
musb_readl(musb->ctrl_base, DAVINCI_RNDIS_REG),
musb_readl(musb->ctrl_base, DAVINCI_AUTOREQ_REG),
musb_readl(musb->ctrl_base,
DAVINCI_USB_INT_SOURCE_REG),
musb_readl(musb->ctrl_base,
DAVINCI_USB_INT_MASK_REG));
if (code <= 0)
goto done;
count += code;
buffer += code;
#endif /* DAVINCI */
#ifdef CONFIG_USB_TUSB6010
code = sprintf(buffer,
"TUSB6010: devconf %08x, phy enable %08x drive %08x"
"\n\totg %03x timer %08x"
"\n\tprcm conf %08x mgmt %08x; int src %08x mask %08x"
"\n",
musb_readl(musb->ctrl_base, TUSB_DEV_CONF),
musb_readl(musb->ctrl_base, TUSB_PHY_OTG_CTRL_ENABLE),
musb_readl(musb->ctrl_base, TUSB_PHY_OTG_CTRL),
musb_readl(musb->ctrl_base, TUSB_DEV_OTG_STAT),
musb_readl(musb->ctrl_base, TUSB_DEV_OTG_TIMER),
musb_readl(musb->ctrl_base, TUSB_PRCM_CONF),
musb_readl(musb->ctrl_base, TUSB_PRCM_MNGMT),
musb_readl(musb->ctrl_base, TUSB_INT_SRC),
musb_readl(musb->ctrl_base, TUSB_INT_MASK));
if (code <= 0)
goto done;
count += code;
buffer += code;
#endif /* DAVINCI */
if (is_cppi_enabled() && musb->dma_controller) {
code = sprintf(buffer,
"CPPI: txcr=%d txsrc=%01x txena=%01x; "
"rxcr=%d rxsrc=%01x rxena=%01x "
"\n",
musb_readl(musb->ctrl_base,
DAVINCI_TXCPPI_CTRL_REG),
musb_readl(musb->ctrl_base,
DAVINCI_TXCPPI_RAW_REG),
musb_readl(musb->ctrl_base,
DAVINCI_TXCPPI_INTENAB_REG),
musb_readl(musb->ctrl_base,
DAVINCI_RXCPPI_CTRL_REG),
musb_readl(musb->ctrl_base,
DAVINCI_RXCPPI_RAW_REG),
musb_readl(musb->ctrl_base,
DAVINCI_RXCPPI_INTENAB_REG));
if (code <= 0)
goto done;
count += code;
buffer += code;
}
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
if (is_peripheral_enabled(musb)) {
code = sprintf(buffer, "Gadget driver: %s\n",
musb->gadget_driver
? musb->gadget_driver->driver.name
: "(none)");
if (code <= 0)
goto done;
count += code;
buffer += code;
}
#endif
done:
return count;
}
/* Write to ProcFS
*
* C soft-connect
* c soft-disconnect
* I enable HS
* i disable HS
* s stop session
* F force session (OTG-unfriendly)
* E rElinquish bus (OTG)
* H request host mode
* h cancel host request
* T start sending TEST_PACKET
* D<num> set/query the debug level
*/
static int musb_proc_write(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
char cmd;
u8 reg;
struct musb *musb = (struct musb *)data;
void __iomem *mbase = musb->mregs;
/* MOD_INC_USE_COUNT; */
if (unlikely(copy_from_user(&cmd, buffer, 1)))
return -EFAULT;
switch (cmd) {
case 'C':
if (mbase) {
reg = musb_readb(mbase, MUSB_POWER)
| MUSB_POWER_SOFTCONN;
musb_writeb(mbase, MUSB_POWER, reg);
}
break;
case 'c':
if (mbase) {
reg = musb_readb(mbase, MUSB_POWER)
& ~MUSB_POWER_SOFTCONN;
musb_writeb(mbase, MUSB_POWER, reg);
}
break;
case 'I':
if (mbase) {
reg = musb_readb(mbase, MUSB_POWER)
| MUSB_POWER_HSENAB;
musb_writeb(mbase, MUSB_POWER, reg);
}
break;
case 'i':
if (mbase) {
reg = musb_readb(mbase, MUSB_POWER)
& ~MUSB_POWER_HSENAB;
musb_writeb(mbase, MUSB_POWER, reg);
}
break;
case 'F':
reg = musb_readb(mbase, MUSB_DEVCTL);
reg |= MUSB_DEVCTL_SESSION;
musb_writeb(mbase, MUSB_DEVCTL, reg);
break;
case 'H':
if (mbase) {
reg = musb_readb(mbase, MUSB_DEVCTL);
reg |= MUSB_DEVCTL_HR;
musb_writeb(mbase, MUSB_DEVCTL, reg);
/* MUSB_HST_MODE( ((struct musb*)data) ); */
/* WARNING("Host Mode\n"); */
}
break;
case 'h':
if (mbase) {
reg = musb_readb(mbase, MUSB_DEVCTL);
reg &= ~MUSB_DEVCTL_HR;
musb_writeb(mbase, MUSB_DEVCTL, reg);
}
break;
case 'T':
if (mbase) {
musb_load_testpacket(musb);
musb_writeb(mbase, MUSB_TESTMODE,
MUSB_TEST_PACKET);
}
break;
#if (MUSB_DEBUG > 0)
/* set/read debug level */
case 'D':{
if (count > 1) {
char digits[8], *p = digits;
int i = 0, level = 0, sign = 1;
int len = min(count - 1, (unsigned long)8);
if (copy_from_user(&digits, &buffer[1], len))
return -EFAULT;
/* optional sign */
if (*p == '-') {
len -= 1;
sign = -sign;
p++;
}
/* read it */
while (i++ < len && *p > '0' && *p < '9') {
level = level * 10 + (*p - '0');
p++;
}
level *= sign;
DBG(1, "debug level %d\n", level);
debug = level;
}
}
break;
case '?':
INFO("?: you are seeing it\n");
INFO("C/c: soft connect enable/disable\n");
INFO("I/i: hispeed enable/disable\n");
INFO("F: force session start\n");
INFO("H: host mode\n");
INFO("T: start sending TEST_PACKET\n");
INFO("D: set/read dbug level\n");
break;
#endif
default:
ERR("Command %c not implemented\n", cmd);
break;
}
musb_platform_try_idle(musb, 0);
return count;
}
static int musb_proc_read(char *page, char **start,
off_t off, int count, int *eof, void *data)
{
char *buffer = page;
int code = 0;
unsigned long flags;
struct musb *musb = data;
unsigned epnum;
count -= off;
count -= 1; /* for NUL at end */
if (count <= 0)
return -EINVAL;
spin_lock_irqsave(&musb->lock, flags);
code = dump_header_stats(musb, buffer);
if (code > 0) {
buffer += code;
count -= code;
}
/* generate the report for the end points */
/* REVISIT ... not unless something's connected! */
for (epnum = 0; count >= 0 && epnum < musb->nr_endpoints;
epnum++) {
code = dump_end_info(musb, epnum, buffer, count);
if (code > 0) {
buffer += code;
count -= code;
}
}
musb_platform_try_idle(musb, 0);
spin_unlock_irqrestore(&musb->lock, flags);
*eof = 1;
return buffer - page;
}
void __devexit musb_debug_delete(char *name, struct musb *musb)
{
if (musb->proc_entry)
remove_proc_entry(name, NULL);
}
struct proc_dir_entry *__init
musb_debug_create(char *name, struct musb *data)
{
struct proc_dir_entry *pde;
/* FIXME convert everything to seq_file; then later, debugfs */
if (!name)
return NULL;
pde = create_proc_entry(name, S_IFREG | S_IRUGO | S_IWUSR, NULL);
data->proc_entry = pde;
if (pde) {
pde->data = data;
/* pde->owner = THIS_MODULE; */
pde->read_proc = musb_proc_read;
pde->write_proc = musb_proc_write;
pde->size = 0;
pr_debug("Registered /proc/%s\n", name);
} else {
pr_debug("Cannot create a valid proc file entry");
}
return pde;
}
