usbdcore_omap1510.c

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		/* Determine the endpoint number for this interrupt */
		epnum = (inw (UDC_EPN_STAT) & 0x0f00) >> 8;
		UDCDBGA ("RX on ep %x", epnum);

		/* acknowledge interrupt */
		outw (UDC_EPn_RX, UDC_IRQ_SRC);

		if (epnum) {
			/* select the endpoint FIFO */
			outw (UDC_EP_Sel | epnum, UDC_EP_NUM);

			omap1510_udc_epn_rx (epnum);

			/* deselect the endpoint FIFO */
			outw (epnum, UDC_EP_NUM);
		}
		valid_irq++;
	}
	if (irq_src & UDC_EPn_TX) {	/* Endpoint N IN transaction */
		/* Determine the endpoint number for this interrupt */
		epnum = (inw (UDC_EPN_STAT) & 0x000f) | USB_DIR_IN;
		UDCDBGA ("TX on ep %x", epnum);

		/* acknowledge interrupt */
		outw (UDC_EPn_TX, UDC_IRQ_SRC);

		if (epnum) {
			/* select the endpoint FIFO */
			outw (UDC_EP_Sel | UDC_EP_Dir | epnum, UDC_EP_NUM);

			omap1510_udc_epn_tx (epnum);

			/* deselect the endpoint FIFO */
			outw (UDC_EP_Dir | epnum, UDC_EP_NUM);
		}
		valid_irq++;
	}
	if (!valid_irq)
		serial_printf (": unknown non-ISO interrupt, IRQ_SRC %.4x\n",
			       irq_src);
}

/*
-------------------------------------------------------------------------------
*/


/*
 * Start of public functions.
 */

/* Called to start packet transmission. */
void udc_endpoint_write (struct usb_endpoint_instance *endpoint)
{
	unsigned short epnum =
		endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;

	UDCDBGA ("Starting transmit on ep %x", epnum);

	if (endpoint->tx_urb) {
		/* select the endpoint FIFO */
		outw (UDC_EP_Sel | UDC_EP_Dir | epnum, UDC_EP_NUM);
		/* write data to FIFO */
		omap1510_write_noniso_tx_fifo (endpoint);
		/* enable tx FIFO to start transmission */
		outw (UDC_Set_FIFO_En, UDC_CTRL);
		/* deselect the endpoint FIFO */
		outw (UDC_EP_Dir | epnum, UDC_EP_NUM);
	}
}

/* Start to initialize h/w stuff */
int udc_init (void)
{
	u16 udc_rev;
	uchar value;
	ulong gpio;
	int i;

	/* Let the device settle down before we start */
	for (i = 0; i < UDC_INIT_MDELAY; i++) udelay(1000);

	udc_device = NULL;

	UDCDBG ("starting");

	/* Check peripheral reset. Must be 1 to make sure
	   MPU TIPB peripheral reset is inactive */
	UDCREG (ARM_RSTCT2);

	/* Set and check clock control.
	 * We might ought to be using the clock control API to do
	 * this instead of fiddling with the clock registers directly
	 * here.
	 */
	outw ((1 << 4) | (1 << 5), CLOCK_CTRL);
	UDCREG (CLOCK_CTRL);
	/* Set and check APLL */
	outw (0x0008, APLL_CTRL);
	UDCREG (APLL_CTRL);
	/* Set and check DPLL */
	outw (0x2210, DPLL_CTRL);
	UDCREG (DPLL_CTRL);
	/* Set and check SOFT */
	outw ((1 << 4) | (1 << 3) | 1, SOFT_REQ);
	/* Short delay to wait for DPLL */
	udelay (1000);

	/* Print banner with device revision */
	udc_rev = inw (UDC_REV) & 0xff;
	printf ("USB:   TI OMAP1510 USB function module rev %d.%d\n",
		udc_rev >> 4, udc_rev & 0xf);

#ifdef CONFIG_OMAP_SX1
	i2c_read (0x32, 0x04, 1, &value, 1);
	value |= 0x04;
	i2c_write (0x32, 0x04, 1, &value, 1);

	i2c_read (0x32, 0x03, 1, &value, 1);
	value |= 0x01;
	i2c_write (0x32, 0x03, 1, &value, 1);

	gpio = inl(GPIO_PIN_CONTROL_REG);
	gpio |=  0x0002; /* A_IRDA_OFF */
	gpio |=  0x0800; /* A_SWITCH   */
	gpio |=  0x8000; /* A_USB_ON   */
	outl (gpio, GPIO_PIN_CONTROL_REG);

	gpio = inl(GPIO_DIR_CONTROL_REG);
	gpio &= ~0x0002; /* A_IRDA_OFF */
	gpio &= ~0x0800; /* A_SWITCH   */
	gpio &= ~0x8000; /* A_USB_ON   */
	outl (gpio, GPIO_DIR_CONTROL_REG);

	gpio = inl(GPIO_DATA_OUTPUT_REG);
	gpio |=  0x0002; /* A_IRDA_OFF */
	gpio &= ~0x0800; /* A_SWITCH   */
	gpio &= ~0x8000; /* A_USB_ON   */
	outl (gpio, GPIO_DATA_OUTPUT_REG);
#endif

	/* The VBUS_MODE bit selects whether VBUS detection is done via
	 * software (1) or hardware (0).  When software detection is
	 * selected, VBUS_CTRL selects whether USB is not connected (0)
	 * or connected (1).
	 */
	outl (inl (FUNC_MUX_CTRL_0) | UDC_VBUS_MODE, FUNC_MUX_CTRL_0);
	outl (inl (FUNC_MUX_CTRL_0) & ~UDC_VBUS_CTRL, FUNC_MUX_CTRL_0);
	UDCREGL (FUNC_MUX_CTRL_0);

	/*
	 * At this point, device is ready for configuration...
	 */

	UDCDBG ("disable USB interrupts");
	outw (0, UDC_IRQ_EN);
	UDCREG (UDC_IRQ_EN);

	UDCDBG ("disable USB DMA");
	outw (0, UDC_DMA_IRQ_EN);
	UDCREG (UDC_DMA_IRQ_EN);

	UDCDBG ("initialize SYSCON1");
	outw (UDC_Self_Pwr | UDC_Pullup_En, UDC_SYSCON1);
	UDCREG (UDC_SYSCON1);

	return 0;
}

/* Stall endpoint */
static void udc_stall_ep (unsigned int ep_addr)
{
	/*int ep_addr = PHYS_EP_TO_EP_ADDR(ep); */
	int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;

	UDCDBGA ("stall ep_addr %d", ep_addr);

	/* REVISIT?
	 * The OMAP TRM section 14.2.4.2 says we must check that the FIFO
	 * is empty before halting the endpoint.  The current implementation
	 * doesn't check that the FIFO is empty.
	 */

	if (!ep_num) {
		outw (UDC_Stall_Cmd, UDC_SYSCON2);
	} else if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
		if (inw (UDC_EP_RX (ep_num)) & UDC_EPn_RX_Valid) {
			/* we have a valid rx endpoint, so halt it */
			outw (UDC_EP_Sel | ep_num, UDC_EP_NUM);
			outw (UDC_Set_Halt, UDC_CTRL);
			outw (ep_num, UDC_EP_NUM);
		}
	} else {
		if (inw (UDC_EP_TX (ep_num)) & UDC_EPn_TX_Valid) {
			/* we have a valid tx endpoint, so halt it */
			outw (UDC_EP_Sel | UDC_EP_Dir | ep_num, UDC_EP_NUM);
			outw (UDC_Set_Halt, UDC_CTRL);
			outw (ep_num, UDC_EP_NUM);
		}
	}
}

/* Reset endpoint */
#if 0
static void udc_reset_ep (unsigned int ep_addr)
{
	/*int ep_addr = PHYS_EP_TO_EP_ADDR(ep); */
	int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;

	UDCDBGA ("reset ep_addr %d", ep_addr);

	if (!ep_num) {
		/* control endpoint 0 can't be reset */
	} else if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
		UDCDBGA ("UDC_EP_RX(%d) = 0x%04x", ep_num,
			 inw (UDC_EP_RX (ep_num)));
		if (inw (UDC_EP_RX (ep_num)) & UDC_EPn_RX_Valid) {
			/* we have a valid rx endpoint, so reset it */
			outw (ep_num | UDC_EP_Sel, UDC_EP_NUM);
			outw (UDC_Reset_EP, UDC_CTRL);
			outw (ep_num, UDC_EP_NUM);
			UDCDBGA ("OUT endpoint %d reset", ep_num);
		}
	} else {
		UDCDBGA ("UDC_EP_TX(%d) = 0x%04x", ep_num,
			 inw (UDC_EP_TX (ep_num)));
		/* Resetting of tx endpoints seems to be causing the USB function
		 * module to fail, which causes problems when the driver is
		 * uninstalled.	 We'll skip resetting tx endpoints for now until
		 * we figure out what the problem is.
		 */
#if 0
		if (inw (UDC_EP_TX (ep_num)) & UDC_EPn_TX_Valid) {
			/* we have a valid tx endpoint, so reset it */
			outw (ep_num | UDC_EP_Dir | UDC_EP_Sel, UDC_EP_NUM);
			outw (UDC_Reset_EP, UDC_CTRL);
			outw (ep_num | UDC_EP_Dir, UDC_EP_NUM);
			UDCDBGA ("IN endpoint %d reset", ep_num);
		}
#endif
	}
}
#endif

/* ************************************************************************** */

/**
 * udc_check_ep - check logical endpoint
  *
 * Return physical endpoint number to use for this logical endpoint or zero if not valid.
 */
#if 0
int udc_check_ep (int logical_endpoint, int packetsize)
{
	if ((logical_endpoint == 0x80) ||
	    ((logical_endpoint & 0x8f) != logical_endpoint)) {
		return 0;
	}

	switch (packetsize) {
	case 8:
	case 16:
	case 32:
	case 64:
	case 128:
	case 256:
	case 512:
		break;
	default:
		return 0;
	}

	return EP_ADDR_TO_PHYS_EP (logical_endpoint);
}
#endif

/*
 * udc_setup_ep - setup endpoint
 *
 * Associate a physical endpoint with endpoint_instance
 */
void udc_setup_ep (struct usb_device_instance *device,
		   unsigned int ep, struct usb_endpoint_instance *endpoint)
{
	UDCDBGA ("setting up endpoint addr %x", endpoint->endpoint_address);

	/* This routine gets called by bi_modinit for endpoint 0 and from
	 * bi_config for all of the other endpoints.  bi_config gets called
	 * during the DEVICE_CREATE, DEVICE_CONFIGURED, and
	 * DEVICE_SET_INTERFACE events.	 We need to reconfigure the OMAP packet
	 * RAM after bi_config scans the selected device configuration and
	 * initializes the endpoint structures, but before this routine enables
	 * the OUT endpoint FIFOs.  Since bi_config calls this routine in a
	 * loop for endpoints 1 through UDC_MAX_ENDPOINTS, we reconfigure our
	 * packet RAM here when ep==1.
	 * I really hate to do this here, but it seems like the API exported
	 * by the USB bus interface controller driver to the usbd-bi module
	 * isn't quite right so there is no good place to do this.
	 */
	if (ep == 1) {
		omap1510_deconfigure_device ();
		omap1510_configure_device (device);
	}

	if (endpoint && (ep < UDC_MAX_ENDPOINTS)) {
		int ep_addr = endpoint->endpoint_address;

		if (!ep_addr) {
			/* nothing to do for endpoint 0 */
		} else if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
			/* nothing to do for IN (tx) endpoints */
		} else {	/* OUT (rx) endpoint */
			if (endpoint->rcv_packetSize) {
				/*struct urb* urb = &(urb_out_array[ep&0xFF]); */
				/*urb->endpoint = endpoint; */
				/*urb->device = device; */
				/*urb->buffer_length = sizeof(urb->buffer); */

				/*endpoint->rcv_urb = urb; */
				omap1510_prepare_endpoint_for_rx (ep_addr);
			}
		}
	}
}

/**
 * udc_disable_ep - disable endpoint
 * @ep:
 *
 * Disable specified endpoint
 */
#if 0
void udc_disable_ep (unsigned int ep_addr)
{
	/*int ep_addr = PHYS_EP_TO_EP_ADDR(ep); */
	int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
	struct usb_endpoint_instance *endpoint = omap1510_find_ep (ep_addr);	/*udc_device->bus->endpoint_array + ep; */

	UDCDBGA ("disable ep_addr %d", ep_addr);

	if (!ep_num) {
		/* nothing to do for endpoint 0 */ ;
	} else if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
		if (endpoint->tx_packetSize) {
			/* we have a valid tx endpoint */
			/*usbd_flush_tx(endpoint); */
			endpoint->tx_urb = NULL;
		}
	} else {
		if (endpoint->rcv_packetSize) {
			/* we have a valid rx endpoint */
			/*usbd_flush_rcv(endpoint); */
			endpoint->rcv_urb = NULL;
		}
	}
}
#endif

/* ************************************************************************** */

/**
 * udc_connected - is the USB cable connected
 *
 * Return non-zero if cable is connected.
 */
#if 0
int udc_connected (void)
{
	return ((inw (UDC_DEVSTAT) & UDC_ATT) == UDC_ATT);
}
#endif

/* Turn on the USB connection by enabling the pullup resistor */
void udc_connect (void)
{
	UDCDBG ("connect, enable Pullup");
	outl (0x00000018, FUNC_MUX_CTRL_D);
}

/* Turn off the USB connection by disabling the pullup resistor */
void udc_disconnect (void)
{
	UDCDBG ("disconnect, disable Pullup");
	outl (0x00000000, FUNC_MUX_CTRL_D);
}

/* ************************************************************************** */


/*
 * udc_disable_interrupts - disable interrupts
 * switch off interrupts
 */
#if 0
void udc_disable_interrupts (struct usb_device_instance *device)
{
	UDCDBG ("disabling all interrupts");
	outw (0, UDC_IRQ_EN);
}
#endif

/* ************************************************************************** */

/**
 * udc_ep0_packetsize - return ep0 packetsize
 */
#if 0
int udc_ep0_packetsize (void)
{
	return EP0_PACKETSIZE;
}
#endif

/* Switch on the UDC */
void udc_enable (struct usb_device_instance *device)
{
	UDCDBGA ("enable device %p, status %d", device, device->status);

	/* initialize driver state variables */
	udc_devstat = 0;

	/* Save the device structure pointer */
	udc_device = device;

	/* Setup ep0 urb */
	if (!ep0_urb) {
		ep0_urb =
			usbd_alloc_urb (udc_device,
					udc_device->bus->endpoint_array);
	} else {
		serial_printf ("udc_enable: ep0_urb already allocated %p\n",
			       ep0_urb);
	}

	UDCDBG ("Check clock status");
	UDCREG (STATUS_REQ);

	/* The VBUS_MODE bit selects whether VBUS detection is done via
	 * software (1) or hardware (0).  When software detection is
	 * selected, VBUS_CTRL selects whether USB is not connected (0)
	 * or connected (1).
	 */
	outl (inl (FUNC_MUX_CTRL_0) | UDC_VBUS_CTRL | UDC_VBUS_MODE,
	      FUNC_MUX_CTRL_0);
	UDCREGL (FUNC_MUX_CTRL_0);

	omap1510_configure_device (device);
}

/* Switch off the UDC */
void udc_disable (void)
{
	UDCDBG ("disable UDC");

	omap1510_deconfigure_device ();

	/* The VBUS_MODE bit selects whether VBUS detection is done via
	 * software (1) or hardware (0).  When software detection is
	 * selected, VBUS_CTRL selects whether USB is not connected (0)
	 * or connected (1).
	 */
	outl (inl (FUNC_MUX_CTRL_0) | UDC_VBUS_MODE, FUNC_MUX_CTRL_0);
	outl (inl (FUNC_MUX_CTRL_0) & ~UDC_VBUS_CTRL, FUNC_MUX_CTRL_0);
	UDCREGL (FUNC_MUX_CTRL_0);

	/* Free ep0 URB */
	if (ep0_urb) {
		/*usbd_dealloc_urb(ep0_urb); */
		ep0_urb = NULL;
	}

	/* Reset device pointer.
	 * We ought to do this here to balance the initialization of udc_device
	 * in udc_enable, but some of our other exported functions get called
	 * by the bus interface driver after udc_disable, so we have to hang on
	 * to the device pointer to avoid a null pointer dereference. */
	/* udc_device = NULL; */
}

/**
 * udc_startup - allow udc code to do any additional startup
 */
void udc_startup_events (struct usb_device_instance *device)
{
	/* The DEVICE_INIT event puts the USB device in the state STATE_INIT. */
	usbd_device_event_irq (device, DEVICE_INIT, 0);

	/* The DEVICE_CREATE event puts the USB device in the state
	 * STATE_ATTACHED.
	 */
	usbd_device_event_irq (device, DEVICE_CREATE, 0);

	/* Some USB controller driver implementations signal
	 * DEVICE_HUB_CONFIGURED and DEVICE_RESET events here.
	 * DEVICE_HUB_CONFIGURED causes a transition to the state STATE_POWERED,
	 * and DEVICE_RESET causes a transition to the state STATE_DEFAULT.
	 * The OMAP USB client controller has the capability to detect when the
	 * USB cable is connected to a powered USB bus via the ATT bit in the
	 * DEVSTAT register, so we will defer the DEVICE_HUB_CONFIGURED and
	 * DEVICE_RESET events until later.
	 */

	udc_enable (device);
}

#endif