458 lines
12 KiB
C
458 lines
12 KiB
C
/*
|
|
* MUSB OTG driver virtual root hub 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/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/time.h>
|
|
#include <linux/timer.h>
|
|
|
|
#include <asm/unaligned.h>
|
|
|
|
#include "musb_core.h"
|
|
|
|
void musb_host_finish_resume(struct work_struct *work)
|
|
{
|
|
struct musb *musb;
|
|
unsigned long flags;
|
|
u8 power;
|
|
|
|
musb = container_of(work, struct musb, finish_resume_work.work);
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
|
|
|
power = musb_readb(musb->mregs, MUSB_POWER);
|
|
power &= ~MUSB_POWER_RESUME;
|
|
dev_dbg(musb->controller, "root port resume stopped, power %02x\n",
|
|
power);
|
|
musb_writeb(musb->mregs, MUSB_POWER, power);
|
|
|
|
/*
|
|
* ISSUE: DaVinci (RTL 1.300) disconnects after
|
|
* resume of high speed peripherals (but not full
|
|
* speed ones).
|
|
*/
|
|
musb->is_active = 1;
|
|
musb->port1_status &= ~(USB_PORT_STAT_SUSPEND | MUSB_PORT_STAT_RESUME);
|
|
musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
|
|
usb_hcd_poll_rh_status(musb->hcd);
|
|
/* NOTE: it might really be A_WAIT_BCON ... */
|
|
musb->xceiv->state = OTG_STATE_A_HOST;
|
|
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
}
|
|
|
|
void musb_port_suspend(struct musb *musb, bool do_suspend)
|
|
{
|
|
struct usb_otg *otg = musb->xceiv->otg;
|
|
u8 power;
|
|
void __iomem *mbase = musb->mregs;
|
|
|
|
if (!is_host_active(musb))
|
|
return;
|
|
|
|
/* NOTE: this doesn't necessarily put PHY into low power mode,
|
|
* turning off its clock; that's a function of PHY integration and
|
|
* MUSB_POWER_ENSUSPEND. PHY may need a clock (sigh) to detect
|
|
* SE0 changing to connect (J) or wakeup (K) states.
|
|
*/
|
|
power = musb_readb(mbase, MUSB_POWER);
|
|
if (do_suspend) {
|
|
int retries = 10000;
|
|
|
|
power &= ~MUSB_POWER_RESUME;
|
|
power |= MUSB_POWER_SUSPENDM;
|
|
musb_writeb(mbase, MUSB_POWER, power);
|
|
|
|
/* Needed for OPT A tests */
|
|
power = musb_readb(mbase, MUSB_POWER);
|
|
while (power & MUSB_POWER_SUSPENDM) {
|
|
power = musb_readb(mbase, MUSB_POWER);
|
|
if (retries-- < 1)
|
|
break;
|
|
}
|
|
|
|
dev_dbg(musb->controller, "Root port suspended, power %02x\n", power);
|
|
|
|
musb->port1_status |= USB_PORT_STAT_SUSPEND;
|
|
switch (musb->xceiv->state) {
|
|
case OTG_STATE_A_HOST:
|
|
musb->xceiv->state = OTG_STATE_A_SUSPEND;
|
|
musb->is_active = otg->host->b_hnp_enable;
|
|
if (musb->is_active)
|
|
mod_timer(&musb->otg_timer, jiffies
|
|
+ msecs_to_jiffies(
|
|
OTG_TIME_A_AIDL_BDIS));
|
|
musb_platform_try_idle(musb, 0);
|
|
break;
|
|
case OTG_STATE_B_HOST:
|
|
musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
|
|
musb->is_active = otg->host->b_hnp_enable;
|
|
musb_platform_try_idle(musb, 0);
|
|
break;
|
|
default:
|
|
dev_dbg(musb->controller, "bogus rh suspend? %s\n",
|
|
usb_otg_state_string(musb->xceiv->state));
|
|
}
|
|
} else if (power & MUSB_POWER_SUSPENDM) {
|
|
power &= ~MUSB_POWER_SUSPENDM;
|
|
power |= MUSB_POWER_RESUME;
|
|
musb_writeb(mbase, MUSB_POWER, power);
|
|
|
|
dev_dbg(musb->controller, "Root port resuming, power %02x\n", power);
|
|
|
|
/* later, GetPortStatus will stop RESUME signaling */
|
|
musb->port1_status |= MUSB_PORT_STAT_RESUME;
|
|
schedule_delayed_work(&musb->finish_resume_work,
|
|
msecs_to_jiffies(20));
|
|
}
|
|
}
|
|
|
|
void musb_port_reset(struct musb *musb, bool do_reset)
|
|
{
|
|
u8 power;
|
|
void __iomem *mbase = musb->mregs;
|
|
|
|
if (musb->xceiv->state == OTG_STATE_B_IDLE) {
|
|
dev_dbg(musb->controller, "HNP: Returning from HNP; no hub reset from b_idle\n");
|
|
musb->port1_status &= ~USB_PORT_STAT_RESET;
|
|
return;
|
|
}
|
|
|
|
if (!is_host_active(musb))
|
|
return;
|
|
|
|
/* NOTE: caller guarantees it will turn off the reset when
|
|
* the appropriate amount of time has passed
|
|
*/
|
|
power = musb_readb(mbase, MUSB_POWER);
|
|
if (do_reset) {
|
|
/*
|
|
* If RESUME is set, we must make sure it stays minimum 20 ms.
|
|
* Then we must clear RESUME and wait a bit to let musb start
|
|
* generating SOFs. If we don't do this, OPT HS A 6.8 tests
|
|
* fail with "Error! Did not receive an SOF before suspend
|
|
* detected".
|
|
*/
|
|
if (power & MUSB_POWER_RESUME) {
|
|
long remain = (unsigned long) musb->rh_timer - jiffies;
|
|
|
|
if (musb->rh_timer > 0 && remain > 0) {
|
|
/* take into account the minimum delay after resume */
|
|
schedule_delayed_work(
|
|
&musb->deassert_reset_work, remain);
|
|
return;
|
|
}
|
|
|
|
musb_writeb(mbase, MUSB_POWER,
|
|
power & ~MUSB_POWER_RESUME);
|
|
|
|
/* Give the core 1 ms to clear MUSB_POWER_RESUME */
|
|
schedule_delayed_work(&musb->deassert_reset_work,
|
|
msecs_to_jiffies(1));
|
|
return;
|
|
}
|
|
|
|
power &= 0xf0;
|
|
musb_writeb(mbase, MUSB_POWER,
|
|
power | MUSB_POWER_RESET);
|
|
|
|
musb->port1_status |= USB_PORT_STAT_RESET;
|
|
musb->port1_status &= ~USB_PORT_STAT_ENABLE;
|
|
schedule_delayed_work(&musb->deassert_reset_work,
|
|
msecs_to_jiffies(50));
|
|
} else {
|
|
dev_dbg(musb->controller, "root port reset stopped\n");
|
|
musb_writeb(mbase, MUSB_POWER,
|
|
power & ~MUSB_POWER_RESET);
|
|
|
|
power = musb_readb(mbase, MUSB_POWER);
|
|
if (power & MUSB_POWER_HSMODE) {
|
|
dev_dbg(musb->controller, "high-speed device connected\n");
|
|
musb->port1_status |= USB_PORT_STAT_HIGH_SPEED;
|
|
}
|
|
|
|
musb->port1_status &= ~USB_PORT_STAT_RESET;
|
|
musb->port1_status |= USB_PORT_STAT_ENABLE
|
|
| (USB_PORT_STAT_C_RESET << 16)
|
|
| (USB_PORT_STAT_C_ENABLE << 16);
|
|
usb_hcd_poll_rh_status(musb->hcd);
|
|
|
|
musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
|
|
}
|
|
}
|
|
|
|
void musb_root_disconnect(struct musb *musb)
|
|
{
|
|
struct usb_otg *otg = musb->xceiv->otg;
|
|
|
|
musb->port1_status = USB_PORT_STAT_POWER
|
|
| (USB_PORT_STAT_C_CONNECTION << 16);
|
|
|
|
usb_hcd_poll_rh_status(musb->hcd);
|
|
musb->is_active = 0;
|
|
|
|
switch (musb->xceiv->state) {
|
|
case OTG_STATE_A_SUSPEND:
|
|
if (otg->host->b_hnp_enable) {
|
|
musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
|
|
musb->g.is_a_peripheral = 1;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_A_HOST:
|
|
musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
|
|
musb->is_active = 0;
|
|
break;
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
musb->xceiv->state = OTG_STATE_B_IDLE;
|
|
break;
|
|
default:
|
|
dev_dbg(musb->controller, "host disconnect (%s)\n",
|
|
usb_otg_state_string(musb->xceiv->state));
|
|
}
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------------------------*/
|
|
|
|
/* Caller may or may not hold musb->lock */
|
|
int musb_hub_status_data(struct usb_hcd *hcd, char *buf)
|
|
{
|
|
struct musb *musb = hcd_to_musb(hcd);
|
|
int retval = 0;
|
|
|
|
/* called in_irq() via usb_hcd_poll_rh_status() */
|
|
if (musb->port1_status & 0xffff0000) {
|
|
*buf = 0x02;
|
|
retval = 1;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static int musb_has_gadget(struct musb *musb)
|
|
{
|
|
/*
|
|
* In host-only mode we start a connection right away. In OTG mode
|
|
* we have to wait until we loaded a gadget. We don't really need a
|
|
* gadget if we operate as a host but we should not start a session
|
|
* as a device without a gadget or else we explode.
|
|
*/
|
|
#ifdef CONFIG_USB_MUSB_HOST
|
|
return 1;
|
|
#else
|
|
if (musb->port_mode == MUSB_PORT_MODE_HOST)
|
|
return 1;
|
|
return musb->g.dev.driver != NULL;
|
|
#endif
|
|
}
|
|
|
|
int musb_hub_control(
|
|
struct usb_hcd *hcd,
|
|
u16 typeReq,
|
|
u16 wValue,
|
|
u16 wIndex,
|
|
char *buf,
|
|
u16 wLength)
|
|
{
|
|
struct musb *musb = hcd_to_musb(hcd);
|
|
u32 temp;
|
|
int retval = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
|
|
|
if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) {
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
return -ESHUTDOWN;
|
|
}
|
|
|
|
/* hub features: always zero, setting is a NOP
|
|
* port features: reported, sometimes updated when host is active
|
|
* no indicators
|
|
*/
|
|
switch (typeReq) {
|
|
case ClearHubFeature:
|
|
case SetHubFeature:
|
|
switch (wValue) {
|
|
case C_HUB_OVER_CURRENT:
|
|
case C_HUB_LOCAL_POWER:
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
break;
|
|
case ClearPortFeature:
|
|
if ((wIndex & 0xff) != 1)
|
|
goto error;
|
|
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_ENABLE:
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
musb_port_suspend(musb, false);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (!hcd->self.is_b_host)
|
|
musb_platform_set_vbus(musb, 0);
|
|
break;
|
|
case USB_PORT_FEAT_C_CONNECTION:
|
|
case USB_PORT_FEAT_C_ENABLE:
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
case USB_PORT_FEAT_C_RESET:
|
|
case USB_PORT_FEAT_C_SUSPEND:
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
dev_dbg(musb->controller, "clear feature %d\n", wValue);
|
|
musb->port1_status &= ~(1 << wValue);
|
|
break;
|
|
case GetHubDescriptor:
|
|
{
|
|
struct usb_hub_descriptor *desc = (void *)buf;
|
|
|
|
desc->bDescLength = 9;
|
|
desc->bDescriptorType = 0x29;
|
|
desc->bNbrPorts = 1;
|
|
desc->wHubCharacteristics = cpu_to_le16(
|
|
0x0001 /* per-port power switching */
|
|
| 0x0010 /* no overcurrent reporting */
|
|
);
|
|
desc->bPwrOn2PwrGood = 5; /* msec/2 */
|
|
desc->bHubContrCurrent = 0;
|
|
|
|
/* workaround bogus struct definition */
|
|
desc->u.hs.DeviceRemovable[0] = 0x02; /* port 1 */
|
|
desc->u.hs.DeviceRemovable[1] = 0xff;
|
|
}
|
|
break;
|
|
case GetHubStatus:
|
|
temp = 0;
|
|
*(__le32 *) buf = cpu_to_le32(temp);
|
|
break;
|
|
case GetPortStatus:
|
|
if (wIndex != 1)
|
|
goto error;
|
|
|
|
put_unaligned(cpu_to_le32(musb->port1_status
|
|
& ~MUSB_PORT_STAT_RESUME),
|
|
(__le32 *) buf);
|
|
|
|
/* port change status is more interesting */
|
|
dev_dbg(musb->controller, "port status %08x\n",
|
|
musb->port1_status);
|
|
break;
|
|
case SetPortFeature:
|
|
if ((wIndex & 0xff) != 1)
|
|
goto error;
|
|
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_POWER:
|
|
/* NOTE: this controller has a strange state machine
|
|
* that involves "requesting sessions" according to
|
|
* magic side effects from incompletely-described
|
|
* rules about startup...
|
|
*
|
|
* This call is what really starts the host mode; be
|
|
* very careful about side effects if you reorder any
|
|
* initialization logic, e.g. for OTG, or change any
|
|
* logic relating to VBUS power-up.
|
|
*/
|
|
if (!hcd->self.is_b_host && musb_has_gadget(musb))
|
|
musb_start(musb);
|
|
break;
|
|
case USB_PORT_FEAT_RESET:
|
|
musb_port_reset(musb, true);
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
musb_port_suspend(musb, true);
|
|
break;
|
|
case USB_PORT_FEAT_TEST:
|
|
if (unlikely(is_host_active(musb)))
|
|
goto error;
|
|
|
|
wIndex >>= 8;
|
|
switch (wIndex) {
|
|
case 1:
|
|
pr_debug("TEST_J\n");
|
|
temp = MUSB_TEST_J;
|
|
break;
|
|
case 2:
|
|
pr_debug("TEST_K\n");
|
|
temp = MUSB_TEST_K;
|
|
break;
|
|
case 3:
|
|
pr_debug("TEST_SE0_NAK\n");
|
|
temp = MUSB_TEST_SE0_NAK;
|
|
break;
|
|
case 4:
|
|
pr_debug("TEST_PACKET\n");
|
|
temp = MUSB_TEST_PACKET;
|
|
musb_load_testpacket(musb);
|
|
break;
|
|
case 5:
|
|
pr_debug("TEST_FORCE_ENABLE\n");
|
|
temp = MUSB_TEST_FORCE_HOST
|
|
| MUSB_TEST_FORCE_HS;
|
|
|
|
musb_writeb(musb->mregs, MUSB_DEVCTL,
|
|
MUSB_DEVCTL_SESSION);
|
|
break;
|
|
case 6:
|
|
pr_debug("TEST_FIFO_ACCESS\n");
|
|
temp = MUSB_TEST_FIFO_ACCESS;
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
musb_writeb(musb->mregs, MUSB_TESTMODE, temp);
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
dev_dbg(musb->controller, "set feature %d\n", wValue);
|
|
musb->port1_status |= 1 << wValue;
|
|
break;
|
|
|
|
default:
|
|
error:
|
|
/* "protocol stall" on error */
|
|
retval = -EPIPE;
|
|
}
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
return retval;
|
|
}
|