static int musb_platform_suspend(struct musb *musb)
{
u32 l;
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *pdata = dev->platform_data;
struct omap_hwmod *oh = pdata->oh;
if (!musb->clock)
return 0;
/* in any role */
l = musb_readl(musb->mregs, OTG_FORCESTDBY);
l |= ENABLEFORCE; /* enable MSTANDBY */
musb_writel(musb->mregs, OTG_FORCESTDBY, l);
pdata->enable_wakeup(oh->od);
otg_set_clk(musb->xceiv, 0);
otg_set_suspend(musb->xceiv, 1);
/* Disable the phy clocks*/
return 0;
}
static int musb_platform_resume(struct musb *musb)
{
u32 l;
if (!musb->clock)
return 0;
otg_set_suspend(musb->xceiv, 0);
if (musb->set_clock)
musb->set_clock(musb->clock, 1);
else
clk_enable(musb->clock);
l = musb_readl(musb->mregs, OTG_SYSCONFIG);
l &= ~ENABLEWAKEUP; /* disable wakeup */
musb_writel(musb->mregs, OTG_SYSCONFIG, l);
l = musb_readl(musb->mregs, OTG_FORCESTDBY);
l &= ~ENABLEFORCE; /* disable MSTANDBY */
musb_writel(musb->mregs, OTG_FORCESTDBY, l);
return 0;
}
static int musb_platform_resume(struct musb *musb)
{
u32 l;
if (!musb->clock)
return 0;
otg_set_suspend(musb->xceiv, 0);
if (musb->set_clock)
musb->set_clock(musb->clock, 1);
else
clk_enable(musb->clock);
l = omap_readl(OTG_SYSCONFIG);
l &= ~ENABLEWAKEUP;
omap_writel(l, OTG_SYSCONFIG);
l = omap_readl(OTG_FORCESTDBY);
l &= ~ENABLEFORCE;
omap_writel(l, OTG_FORCESTDBY);
return 0;
}
static void musb_otg_notifier_work(struct work_struct *data_notifier_work)
{
u32 val;
struct musb_otg_work *otg_work =
container_of(data_notifier_work, struct musb_otg_work, work);
struct musb *musb = otg_work->musb;
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *pdata = dev->platform_data;
struct omap_musb_board_data *data = pdata->board_data;
enum usb_xceiv_events xceiv_event = otg_work->xceiv_event;
static int last_event = -1;
kfree(otg_work);
/* avoid duplicate notifications */
if (last_event == xceiv_event) {
WARN(1, "Duplicated event(%d): ignored\n", xceiv_event);
return;
}
/* check for incorrect transitions */
if ((last_event == USB_EVENT_VBUS && xceiv_event == USB_EVENT_ID) ||
(last_event == USB_EVENT_ID && xceiv_event == USB_EVENT_VBUS)) {
WARN(1, "Incorrect transition (%d)->(%d)\n", last_event, xceiv_event);
}
/* store last event */
last_event = xceiv_event;
switch (xceiv_event) {
case USB_EVENT_ID:
dev_dbg(musb->controller, "ID GND\n");
if (is_otg_enabled(musb)) {
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
if (musb->gadget_driver) {
pm_runtime_get_sync(musb->controller);
val = musb_readl(musb->mregs, OTG_INTERFSEL);
otg_set_suspend(musb->xceiv, 1);
if (data->interface_type ==
MUSB_INTERFACE_UTMI) {
val &= ~ULPI_12PIN;
val |= UTMI_8BIT;
} else {
val |= ULPI_12PIN;
}
musb_writel(musb->mregs, OTG_INTERFSEL, val);
otg_set_suspend(musb->xceiv, 0);
otg_init(musb->xceiv);
omap2430_musb_set_vbus(musb, 1);
}
#endif
} else {
pm_runtime_get_sync(musb->controller);
val = musb_readl(musb->mregs, OTG_INTERFSEL);
otg_set_suspend(musb->xceiv, 1);
if (data->interface_type == MUSB_INTERFACE_UTMI) {
val &= ~ULPI_12PIN;
val |= UTMI_8BIT;
} else {
val |= ULPI_12PIN;
}
musb_writel(musb->mregs, OTG_INTERFSEL, val);
otg_set_suspend(musb->xceiv, 0);
otg_init(musb->xceiv);
omap2430_musb_set_vbus(musb, 1);
}
break;
case USB_EVENT_CHARGER:
dev_dbg(musb->controller, "Dedicated charger connect\n");
musb->is_ac_charger = true;
break;
case USB_EVENT_VBUS:
dev_dbg(musb->controller, "VBUS Connect\n");
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
if (musb->gadget_driver) {
pm_runtime_get_sync(musb->controller);
val = musb_readl(musb->mregs, OTG_INTERFSEL);
otg_set_suspend(musb->xceiv, 1);
if (data->interface_type ==
MUSB_INTERFACE_UTMI) {
val &= ~ULPI_12PIN;
val |= UTMI_8BIT;
} else {
val |= ULPI_12PIN;
}
musb_writel(musb->mregs, OTG_INTERFSEL, val);
otg_set_suspend(musb->xceiv, 0);
}
#endif
otg_init(musb->xceiv);
break;
case USB_EVENT_NONE:
if (musb->is_ac_charger) {
dev_dbg(musb->controller,
"Dedicated charger disconnect\n");
musb->is_ac_charger = false;
break;
}
dev_dbg(musb->controller, "VBUS Disconnect\n");
pm_runtime_get_sync(musb->controller);
if (data->interface_type == MUSB_INTERFACE_UTMI) {
omap2430_musb_set_vbus(musb, 0);
if (musb->xceiv->set_vbus)
otg_set_vbus(musb->xceiv, 0);
}
otg_shutdown(musb->xceiv);
otg_set_suspend(musb->xceiv, 1);
val = musb_readl(musb->mregs, OTG_INTERFSEL);
val |= ULPI_12PIN;
musb_writel(musb->mregs, OTG_INTERFSEL, val);
pm_runtime_mark_last_busy(musb->controller);
pm_runtime_put_autosuspend(musb->controller);
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
if (musb->gadget_driver)
#endif
pm_runtime_put_autosuspend(musb->controller);
break;
default:
dev_dbg(musb->controller, "ID float\n");
}
}
static void usb_do_work(struct work_struct *w)
{
struct usb_info *ui = container_of(w, struct usb_info, work);
unsigned long iflags;
unsigned flags, _vbus;
for (;;) {
spin_lock_irqsave(&ui->lock, iflags);
flags = ui->flags;
ui->flags = 0;
_vbus = vbus;
spin_unlock_irqrestore(&ui->lock, iflags);
/* give up if we have nothing to do */
if (flags == 0)
break;
switch (ui->state) {
case USB_STATE_IDLE:
if (flags & USB_FLAG_START) {
int ret;
struct msm_otg *otg = to_msm_otg(ui->xceiv);
if (!_vbus) {
ui->state = USB_STATE_OFFLINE;
break;
}
msm72k_pm_qos_update(1);
pr_info("msm72k_udc: IDLE -> ONLINE\n");
usb_reset(ui);
ret = request_irq(otg->irq, usb_interrupt,
IRQF_SHARED,
ui->pdev->name, ui);
/* FIXME: should we call BUG_ON when
* requst irq fails
*/
if (ret) {
pr_err("hsusb: peripheral: request irq"
" failed:(%d)", ret);
msm72k_pm_qos_update(0);
break;
}
ui->irq = otg->irq;
msm72k_pullup(&ui->gadget, 1);
if (ui->chg_connected) {
msleep(500);
ui->chg_type = is_wall_charger(ui);
ui->chg_current =
ui->chg_type ? 1500 : 100;
ui->chg_connected(ui->chg_type);
}
ui->state = USB_STATE_ONLINE;
usb_do_work_check_vbus(ui);
}
break;
case USB_STATE_ONLINE:
/* If at any point when we were online, we received
* the signal to go offline, we must honor it
*/
if (flags & USB_FLAG_VBUS_OFFLINE) {
pr_info("msm72k_udc: ONLINE -> OFFLINE\n");
otg_set_suspend(ui->xceiv, 0);
/* synchronize with irq context */
spin_lock_irqsave(&ui->lock, iflags);
ui->running = 0;
ui->online = 0;
msm72k_pullup(&ui->gadget, 0);
spin_unlock_irqrestore(&ui->lock, iflags);
if (ui->chg_connected) {
ui->chg_type = CHG_TYPE_INVALID;
ui->chg_current = 0;
ui->chg_connected(ui->chg_type);
}
if (ui->irq) {
free_irq(ui->irq, ui);
ui->irq = 0;
}
if (ui->usb_connected)
ui->usb_connected(0);
/* terminate any transactions, etc */
flush_all_endpoints(ui);
if (ui->driver) {
printk(KERN_INFO "usb: notify offline\n");
ui->driver->disconnect(&ui->gadget);
}
/* power down phy, clock down usb */
otg_set_suspend(ui->xceiv, 1);
ui->state = USB_STATE_OFFLINE;
usb_do_work_check_vbus(ui);
msm72k_pm_qos_update(0);
break;
}
if (flags & USB_FLAG_SUSPEND) {
/* TBD: Not supporting bus suspend */
ui->chg_vbus_draw(0);
break;
}
if (flags & USB_FLAG_CONFIGURED) {
ui->chg_current = ui->b_max_pow;
ui->chg_vbus_draw(ui->b_max_pow);
break;
}
if (flags & USB_FLAG_RESET) {
pr_info("msm72k_udc: ONLINE -> RESET\n");
msm72k_pullup(&ui->gadget, 0);
usb_reset(ui);
msm72k_pullup(&ui->gadget, 1);
pr_info("msm72k_udc: RESET -> ONLINE\n");
break;
}
break;
case USB_STATE_OFFLINE:
/* If we were signaled to go online and vbus is still
* present when we received the signal, go online.
*/
if ((flags & USB_FLAG_VBUS_ONLINE) && _vbus) {
int ret;
struct msm_otg *otg = to_msm_otg(ui->xceiv);
pr_info("msm72k_udc: OFFLINE -> ONLINE\n");
msm72k_pm_qos_update(1);
otg_set_suspend(ui->xceiv, 0);
usb_reset(ui);
if (ui->usb_connected)
ui->usb_connected(1);
ui->state = USB_STATE_ONLINE;
usb_do_work_check_vbus(ui);
ret = request_irq(otg->irq, usb_interrupt,
IRQF_SHARED,
ui->pdev->name, ui);
/* FIXME: should we call BUG_ON when
* requst irq fails
*/
if (ret) {
pr_err("hsusb: peripheral: request irq"
" failed:(%d)", ret);
break;
}
ui->irq = otg->irq;
enable_irq_wake(otg->irq);
msm72k_pullup(&ui->gadget, 1);
if (ui->chg_connected) {
msleep(500);
ui->chg_type = is_wall_charger(ui);
ui->chg_current =
ui->chg_type ? 1500 : 100;
ui->chg_connected(ui->chg_type);
}
}
break;
}
}
}
