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usb: gadget: Add support for OTG

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Based on work by Nvidia

Signed-off-by: Benoit Goby <benoit@android.com>
This commit is contained in:
Benoit Goby
2010-06-04 19:36:06 -07:00
committed by Colin Cross
parent 6fb715de6a
commit 0e06e44e33
1 changed files with 72 additions and 35 deletions
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107
drivers/usb/gadget/fsl_udc_core.c
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@@ -291,16 +291,16 @@ static void dr_controller_run(struct fsl_udc *udc)
#ifdef CONFIG_ARCH_TEGRA
unsigned long timeout;
#define FSL_UDC_RUN_TIMEOUT 1000
#endif
#ifdef CONFIG_ARCH_TEGRA
/* Enable cable detection interrupt, without setting the
* USB_SYS_VBUS_WAKEUP_INT bit. USB_SYS_VBUS_WAKEUP_INT is
* clear on write */
temp = fsl_readl(&usb_sys_regs->vbus_wakeup);
temp |= (USB_SYS_VBUS_WAKEUP_INT_ENABLE | USB_SYS_VBUS_WAKEUP_ENABLE);
temp &= ~USB_SYS_VBUS_WAKEUP_INT_STATUS;
fsl_writel(temp, &usb_sys_regs->vbus_wakeup);
/* If OTG transceiver is available, then it handles the VBUS detection */
if (!udc_controller->transceiver) {
/* Enable cable detection interrupt, without setting the
* USB_SYS_VBUS_WAKEUP_INT bit. USB_SYS_VBUS_WAKEUP_INT is
* clear on write */
temp = fsl_readl(&usb_sys_regs->vbus_wakeup);
temp |= (USB_SYS_VBUS_WAKEUP_INT_ENABLE | USB_SYS_VBUS_WAKEUP_ENABLE);
temp &= ~USB_SYS_VBUS_WAKEUP_INT_STATUS;
fsl_writel(temp, &usb_sys_regs->vbus_wakeup);
}
#endif
/* Enable DR irq reg */
@@ -1788,32 +1788,65 @@ static irqreturn_t fsl_udc_irq(int irq, void *_udc)
fsl_writel(irq_src, &dr_regs->usbsts);
/* VDBG("irq_src [0x%8x]", irq_src); */
#if defined(CONFIG_ARCH_TEGRA)
/* VBUS A session detection interrupts. When the interrupt is received,
* the mark the vbus active shadow.
*/
temp = fsl_readl(&usb_sys_regs->vbus_sensors);
if (temp & USB_SYS_VBUS_ASESSION_CHANGED) {
if (temp & USB_SYS_VBUS_ASESSION) {
udc->vbus_active = 1;
} else {
reset_queues(udc);
udc->vbus_active = 0;
udc->usb_state = USB_STATE_DEFAULT;
}
/* write back the register to clear the interrupt */
fsl_writel(temp, &usb_sys_regs->vbus_wakeup);
#if 0
/* XXX */
if (udc->vbus_active) {
fsl_udc_clk_resume();
#ifdef CONFIG_ARCH_TEGRA
if (udc->transceiver) {
if (udc->transceiver->state == OTG_STATE_B_PERIPHERAL) {
if (!udc->vbus_active) {
/* set vbus active and enable the usb clocks */
udc->vbus_active = 1;
fsl_udc_clk_resume();
/* setup the controller in the device mode */
dr_controller_setup(udc);
/* setup EP0 for setup packet */
ep0_setup(udc);
/* start the controller */
dr_controller_run(udc);
/* initialize the USB and EP states */
udc->usb_state = USB_STATE_ATTACHED;
udc->ep0_state = WAIT_FOR_SETUP;
udc->ep0_dir = 0;
}
} else if (udc->transceiver->state == OTG_STATE_A_SUSPEND) {
if (udc->vbus_active) {
/* Reset all internal Queues and inform client driver */
reset_queues(udc);
/* stop the controller and turn off the clocks */
dr_controller_stop(udc);
fsl_udc_clk_suspend();
udc->vbus_active = 0;
udc->usb_state = USB_STATE_DEFAULT;
} else {
spin_unlock_irqrestore(&udc->lock, flags);
return IRQ_HANDLED;
}
} else {
fsl_udc_clk_suspend();
spin_unlock_irqrestore(&udc->lock, flags);
return IRQ_HANDLED;
}
#endif
} else {
/* VBUS A session detection interrupts. When the interrupt is received,
* the mark the vbus active shadow.
*/
temp = fsl_readl(&usb_sys_regs->vbus_wakeup);
if (temp & USB_SYS_VBUS_WAKEUP_INT_STATUS) {
if (temp & USB_SYS_VBUS_STATUS) {
udc->vbus_active = 1;
} else {
reset_queues(udc);
udc->vbus_active = 0;
udc->usb_state = USB_STATE_DEFAULT;
}
/* write back the register to clear the interrupt */
fsl_writel(temp, &usb_sys_regs->vbus_wakeup);
status = IRQ_HANDLED;
if (udc->vbus_active)
fsl_udc_clk_resume();
else
fsl_udc_clk_suspend();
status = IRQ_HANDLED;
}
}
#endif
@@ -1910,6 +1943,9 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
goto out;
}
if (udc_controller->transceiver)
otg_set_peripheral(udc_controller->transceiver, &udc_controller->gadget);
/* Enable DR IRQ reg and Set usbcmd reg Run bit */
dr_controller_run(udc_controller);
udc_controller->usb_state = USB_STATE_ATTACHED;
@@ -2514,12 +2550,13 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
}
create_proc_file();
#if 0
/* XXX */
#ifdef CONFIG_USB_OTG_UTILS
udc_controller->transceiver = otg_get_transceiver();
#else
#ifdef CONFIG_ARCH_TEGRA
/* Power down the phy if cable is not connected */
if (!(fsl_readl(&usb_sys_regs->vbus_wakeup) & USB_SYS_VBUS_STATUS))
platform_udc_clk_suspend();
fsl_udc_clk_suspend();
#endif
#endif