/* * (C) Copyright 2003 * Gerry Hamel, geh@ti.com, Texas Instruments * * Based on * linux/drivers/usb/device/bi/omap.c * TI OMAP1510 USB bus interface driver * * Author: MontaVista Software, Inc. *	   source@mvista.com *	   (C) Copyright 2002 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307	 USA * */#include <common.h>#if defined(CONFIG_OMAP1510) && defined(CONFIG_USB_DEVICE)#include <asm/io.h>#ifdef CONFIG_OMAP_SX1#include <i2c.h>#endif#include "usbdcore.h"#include "usbdcore_omap1510.h"#include "usbdcore_ep0.h"#define UDC_INIT_MDELAY		     80 /* Device settle delay */#define UDC_MAX_ENDPOINTS	     31 /* Number of endpoints on this UDC *//* Some kind of debugging output... */#if 1#define UDCDBG(str)#define UDCDBGA(fmt,args...)#else  /* The bugs still exists... */#define UDCDBG(str) serial_printf("[%s] %s:%d: " str "\n", __FILE__,__FUNCTION__,__LINE__)#define UDCDBGA(fmt,args...) serial_printf("[%s] %s:%d: " fmt "\n", __FILE__,__FUNCTION__,__LINE__, ##args)#endif#if 1#define UDCREG(name)#define UDCREGL(name)#else  /* The bugs still exists... */#define UDCREG(name)	 serial_printf("%s():%d: %s[%08x]=%.4x\n",__FUNCTION__,__LINE__, (#name), name, inw(name))	/* For 16-bit regs */#define UDCREGL(name)	 serial_printf("%s():%d: %s[%08x]=%.8x\n",__FUNCTION__,__LINE__, (#name), name, inl(name))	/* For 32-bit regs */#endifstatic struct urb *ep0_urb = NULL;static struct usb_device_instance *udc_device;	/* Used in interrupt handler */static u16 udc_devstat = 0;	/* UDC status (DEVSTAT) */static u32 udc_interrupts = 0;static void udc_stall_ep (unsigned int ep_addr);static struct usb_endpoint_instance *omap1510_find_ep (int ep){	int i;	for (i = 0; i < udc_device->bus->max_endpoints; i++) {		if (udc_device->bus->endpoint_array[i].endpoint_address == ep)			return &udc_device->bus->endpoint_array[i];	}	return NULL;}/* ************************************************************************** *//* IO *//* * omap1510_prepare_endpoint_for_rx * * This function implements TRM Figure 14-11. * * The endpoint to prepare for transfer is specified as a physical endpoint * number.  For OUT (rx) endpoints 1 through 15, the corresponding endpoint * configuration register is checked to see if the endpoint is ISO or not. * If the OUT endpoint is valid and is non-ISO then its FIFO is enabled. * No action is taken for endpoint 0 or for IN (tx) endpoints 16 through 30. */static void omap1510_prepare_endpoint_for_rx (int ep_addr){	int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;	UDCDBGA ("omap1510_prepare_endpoint %x", ep_addr);	if (((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)) {		if ((inw (UDC_EP_RX (ep_num)) &		     (UDC_EPn_RX_Valid | UDC_EPn_RX_Iso)) ==		    UDC_EPn_RX_Valid) {			/* rx endpoint is valid, non-ISO, so enable its FIFO */			outw (UDC_EP_Sel | ep_num, UDC_EP_NUM);			outw (UDC_Set_FIFO_En, UDC_CTRL);			outw (0, UDC_EP_NUM);		}	}}/* omap1510_configure_endpoints * * This function implements TRM Figure 14-10. */static void omap1510_configure_endpoints (struct usb_device_instance *device){	int ep;	struct usb_bus_instance *bus;	struct usb_endpoint_instance *endpoint;	unsigned short ep_ptr;	unsigned short ep_size;	unsigned short ep_isoc;	unsigned short ep_doublebuffer;	int ep_addr;	int packet_size;	int buffer_size;	int attributes;	bus = device->bus;	/* There is a dedicated 2048 byte buffer for USB packets that may be	 * arbitrarily partitioned among the endpoints on 8-byte boundaries.	 * The first 8 bytes are reserved for receiving setup packets on	 * endpoint 0.	 */	ep_ptr = 8;		/* reserve the first 8 bytes for the setup fifo */	for (ep = 0; ep < bus->max_endpoints; ep++) {		endpoint = bus->endpoint_array + ep;		ep_addr = endpoint->endpoint_address;		if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {			/* IN endpoint */			packet_size = endpoint->tx_packetSize;			attributes = endpoint->tx_attributes;		} else {			/* OUT endpoint */			packet_size = endpoint->rcv_packetSize;			attributes = endpoint->rcv_attributes;		}		switch (packet_size) {		case 0:			ep_size = 0;			break;		case 8:			ep_size = 0;			break;		case 16:			ep_size = 1;			break;		case 32:			ep_size = 2;			break;		case 64:			ep_size = 3;			break;		case 128:			ep_size = 4;			break;		case 256:			ep_size = 5;			break;		case 512:			ep_size = 6;			break;		default:			UDCDBGA ("ep 0x%02x has bad packet size %d",				 ep_addr, packet_size);			packet_size = 0;			ep_size = 0;			break;		}		switch (attributes & USB_ENDPOINT_XFERTYPE_MASK) {		case USB_ENDPOINT_XFER_CONTROL:		case USB_ENDPOINT_XFER_BULK:		case USB_ENDPOINT_XFER_INT:		default:			/* A non-isochronous endpoint may optionally be			 * double-buffered. For now we disable			 * double-buffering.			 */			ep_doublebuffer = 0;			ep_isoc = 0;			if (packet_size > 64)				packet_size = 0;			if (!ep || !ep_doublebuffer)				buffer_size = packet_size;			else				buffer_size = packet_size * 2;			break;		case USB_ENDPOINT_XFER_ISOC:			/* Isochronous endpoints are always double-			 * buffered, but the double-buffering bit			 * in the endpoint configuration register			 * becomes the msb of the endpoint size so we			 * set the double-buffering flag to zero.			 */			ep_doublebuffer = 0;			ep_isoc = 1;			buffer_size = packet_size * 2;			break;		}		/* check to see if our packet buffer RAM is exhausted */		if ((ep_ptr + buffer_size) > 2048) {			UDCDBGA ("out of packet RAM for ep 0x%02x buf size %d", ep_addr, buffer_size);			buffer_size = packet_size = 0;		}		/* force a default configuration for endpoint 0 since it is		 * always enabled		 */		if (!ep && ((packet_size < 8) || (packet_size > 64))) {			buffer_size = packet_size = 64;			ep_size = 3;		}		if (!ep) {			/* configure endpoint 0 */			outw ((ep_size << 12) | (ep_ptr >> 3), UDC_EP0);			/*UDCDBGA("ep 0 buffer offset 0x%03x packet size 0x%03x", */			/*	ep_ptr, packet_size); */		} else if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {			/* IN endpoint */			if (packet_size) {				outw ((1 << 15) | (ep_doublebuffer << 14) |				      (ep_size << 12) | (ep_isoc << 11) |				      (ep_ptr >> 3),				      UDC_EP_TX (ep_addr &						 USB_ENDPOINT_NUMBER_MASK));				UDCDBGA ("IN ep %d buffer offset 0x%03x"					 " packet size 0x%03x",					 ep_addr & USB_ENDPOINT_NUMBER_MASK,					 ep_ptr, packet_size);			} else {				outw (0,				      UDC_EP_TX (ep_addr &						 USB_ENDPOINT_NUMBER_MASK));			}		} else {			/* OUT endpoint */			if (packet_size) {				outw ((1 << 15) | (ep_doublebuffer << 14) |				      (ep_size << 12) | (ep_isoc << 11) |				      (ep_ptr >> 3),				      UDC_EP_RX (ep_addr &						 USB_ENDPOINT_NUMBER_MASK));				UDCDBGA ("OUT ep %d buffer offset 0x%03x"					 " packet size 0x%03x",					 ep_addr & USB_ENDPOINT_NUMBER_MASK,					 ep_ptr, packet_size);			} else {				outw (0,				      UDC_EP_RX (ep_addr &						 USB_ENDPOINT_NUMBER_MASK));			}		}		ep_ptr += buffer_size;	}}/* omap1510_deconfigure_device * * This function balances omap1510_configure_device. */static void omap1510_deconfigure_device (void){	int epnum;	UDCDBG ("clear Cfg_Lock");	outw (inw (UDC_SYSCON1) & ~UDC_Cfg_Lock, UDC_SYSCON1);	UDCREG (UDC_SYSCON1);	/* deconfigure all endpoints */	for (epnum = 1; epnum <= 15; epnum++) {		outw (0, UDC_EP_RX (epnum));		outw (0, UDC_EP_TX (epnum));	}}/* omap1510_configure_device * * This function implements TRM Figure 14-9. */static void omap1510_configure_device (struct usb_device_instance *device){	omap1510_configure_endpoints (device);	/* Figure 14-9 indicates we should enable interrupts here, but we have	 * other routines (udc_all_interrupts, udc_suspended_interrupts) to	 * do that.	 */	UDCDBG ("set Cfg_Lock");	outw (inw (UDC_SYSCON1) | UDC_Cfg_Lock, UDC_SYSCON1);	UDCREG (UDC_SYSCON1);}/* omap1510_write_noniso_tx_fifo * * This function implements TRM Figure 14-30. * * If the endpoint has an active tx_urb, then the next packet of data from the * URB is written to the tx FIFO.  The total amount of data in the urb is given * by urb->actual_length.  The maximum amount of data that can be sent in any * one packet is given by endpoint->tx_packetSize.  The number of data bytes * from this URB that have already been transmitted is given by endpoint->sent. * endpoint->last is updated by this routine with the number of data bytes * transmitted in this packet. * * In accordance with Figure 14-30, the EP_NUM register must already have been * written with the value to select the appropriate tx FIFO before this routine * is called. */static void omap1510_write_noniso_tx_fifo (struct usb_endpoint_instance					   *endpoint){	struct urb *urb = endpoint->tx_urb;	if (urb) {		unsigned int last, i;		UDCDBGA ("urb->buffer %p, buffer_length %d, actual_length %d",			 urb->buffer, urb->buffer_length, urb->actual_length);		if ((last =		     MIN (urb->actual_length - endpoint->sent,			  endpoint->tx_packetSize))) {			u8 *cp = urb->buffer + endpoint->sent;			UDCDBGA ("endpoint->sent %d, tx_packetSize %d, last %d", endpoint->sent, endpoint->tx_packetSize, last);			if (((u32) cp & 1) == 0) {	/* word aligned? */				outsw (UDC_DATA, cp, last >> 1);			} else {	/* byte aligned. */				for (i = 0; i < (last >> 1); i++) {					u16 w = ((u16) cp[2 * i + 1] << 8) |						(u16) cp[2 * i];					outw (w, UDC_DATA);				}			}			if (last & 1) {				outb (*(cp + last - 1), UDC_DATA);			}		}		endpoint->last = last;	}}/* omap1510_read_noniso_rx_fifo * * This function implements TRM Figure 14-28. * * If the endpoint has an active rcv_urb, then the next packet of data is read * from the rcv FIFO and written to rcv_urb->buffer at offset * rcv_urb->actual_length to append the packet data to the data from any * previous packets for this transfer.	We assume that there is sufficient room * left in the buffer to hold an entire packet of data. * * The return value is the number of bytes read from the FIFO for this packet. * * In accordance with Figure 14-28, the EP_NUM register must already have been * written with the value to select the appropriate rcv FIFO before this routine * is called. */static int omap1510_read_noniso_rx_fifo (struct usb_endpoint_instance					 *endpoint){	struct urb *urb = endpoint->rcv_urb;	int len = 0;	if (urb) {		len = inw (UDC_RXFSTAT);		if (len) {			unsigned char *cp = urb->buffer + urb->actual_length;			insw (UDC_DATA, cp, len >> 1);			if (len & 1)				*(cp + len - 1) = inb (UDC_DATA);		}	}	return len;}/* omap1510_prepare_for_control_write_status * * This function implements TRM Figure 14-17. * * We have to deal here with non-autodecoded control writes that haven't already * been dealt with by ep0_recv_setup.  The non-autodecoded standard control * write requests are:	set/clear endpoint feature, set configuration, set * interface, and set descriptor.  ep0_recv_setup handles set/clear requests for * ENDPOINT_HALT by halting the endpoint for a set request and resetting the * endpoint for a clear request.  ep0_recv_setup returns an error for * SET_DESCRIPTOR requests which causes them to be terminated with a stall by * the setup handler.  A SET_INTERFACE request is handled by ep0_recv_setup by * generating a DEVICE_SET_INTERFACE event.  This leaves only the * SET_CONFIGURATION event for us to deal with here. * */static void omap1510_prepare_for_control_write_status (struct urb *urb){	struct usb_device_request *request = &urb->device_request;;	/* check for a SET_CONFIGURATION request */	if (request->bRequest == USB_REQ_SET_CONFIGURATION) {		int configuration = le16_to_cpu (request->wValue) & 0xff;		unsigned short devstat = inw (UDC_DEVSTAT);		if ((devstat & (UDC_ADD | UDC_CFG)) == UDC_ADD) {			/* device is currently in ADDRESSED state */			if (configuration) {				/* Assume the specified non-zero configuration				 * value is valid and switch to the CONFIGURED				 * state.				 */				outw (UDC_Dev_Cfg, UDC_SYSCON2);			}		} else if ((devstat & UDC_CFG) == UDC_CFG) {			/* device is currently in CONFIGURED state */			if (!configuration) {				/* Switch to ADDRESSED state. */				outw (UDC_Clr_Cfg, UDC_SYSCON2);			}		}	}	/* select EP0 tx FIFO */	outw (UDC_EP_Dir | UDC_EP_Sel, UDC_EP_NUM);	/* clear endpoint (no data bytes in status stage) */	outw (UDC_Clr_EP, UDC_CTRL);	/* enable the EP0 tx FIFO */	outw (UDC_Set_FIFO_En, UDC_CTRL);	/* deselect the endpoint */	outw (UDC_EP_Dir, UDC_EP_NUM);}/* udc_state_transition_up * udc_state_transition_down * * Helper functions to implement device state changes.	The device states and * the events that transition between them are: * *				STATE_ATTACHED *				||	/\ *				\/	|| *	DEVICE_HUB_CONFIGURED			DEVICE_HUB_RESET *				||	/\ *				\/	|| *				STATE_POWERED *				||	/\ *				\/	|| *	DEVICE_RESET				DEVICE_POWER_INTERRUPTION *				||	/\ *				\/	|| *				STATE_DEFAULT *				||	/\ *				\/	|| *	DEVICE_ADDRESS_ASSIGNED			DEVICE_RESET *				||	/\ *				\/	|| *				STATE_ADDRESSED *				||	/\ *				\/	|| *	DEVICE_CONFIGURED			DEVICE_DE_CONFIGURED *				||	/\ *				\/	|| *				STATE_CONFIGURED * * udc_state_transition_up transitions up (in the direction from STATE_ATTACHED * to STATE_CONFIGURED) from the specified initial state to the specified final * state, passing through each intermediate state on the way.  If the initial * state is at or above (i.e. nearer to STATE_CONFIGURED) the final state, then * no state transitions will take place. * * udc_state_transition_down transitions down (in the direction from * STATE_CONFIGURED to STATE_ATTACHED) from the specified initial state to the * specified final state, passing through each intermediate state on the way. * If the initial state is at or below (i.e. nearer to STATE_ATTACHED) the final * state, then no state transitions will take place. * * These functions must only be called with interrupts disabled. */static void udc_state_transition_up (usb_device_state_t initial,				     usb_device_state_t final){	if (initial < final) {		switch (initial) {		case STATE_ATTACHED:			usbd_device_event_irq (udc_device,