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Diffstat (limited to 'drivers/staging/ccg/epautoconf.c')
| -rw-r--r-- | drivers/staging/ccg/epautoconf.c | 393 |
1 files changed, 0 insertions, 393 deletions
diff --git a/drivers/staging/ccg/epautoconf.c b/drivers/staging/ccg/epautoconf.c deleted file mode 100644 index 51f3d42f5a64..000000000000 --- a/drivers/staging/ccg/epautoconf.c +++ /dev/null @@ -1,393 +0,0 @@ -/* - * epautoconf.c -- endpoint autoconfiguration for usb gadget drivers - * - * Copyright (C) 2004 David Brownell - * - * 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. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/device.h> - -#include <linux/ctype.h> -#include <linux/string.h> - -#include <linux/usb/ch9.h> -#include <linux/usb/gadget.h> - -#include "gadget_chips.h" - - -/* we must assign addresses for configurable endpoints (like net2280) */ -static unsigned epnum; - -// #define MANY_ENDPOINTS -#ifdef MANY_ENDPOINTS -/* more than 15 configurable endpoints */ -static unsigned in_epnum; -#endif - - -/* - * This should work with endpoints from controller drivers sharing the - * same endpoint naming convention. By example: - * - * - ep1, ep2, ... address is fixed, not direction or type - * - ep1in, ep2out, ... address and direction are fixed, not type - * - ep1-bulk, ep2-bulk, ... address and type are fixed, not direction - * - ep1in-bulk, ep2out-iso, ... all three are fixed - * - ep-* ... no functionality restrictions - * - * Type suffixes are "-bulk", "-iso", or "-int". Numbers are decimal. - * Less common restrictions are implied by gadget_is_*(). - * - * NOTE: each endpoint is unidirectional, as specified by its USB - * descriptor; and isn't specific to a configuration or altsetting. - */ -static int -ep_matches ( - struct usb_gadget *gadget, - struct usb_ep *ep, - struct usb_endpoint_descriptor *desc, - struct usb_ss_ep_comp_descriptor *ep_comp -) -{ - u8 type; - const char *tmp; - u16 max; - - int num_req_streams = 0; - - /* endpoint already claimed? */ - if (NULL != ep->driver_data) - return 0; - - /* only support ep0 for portable CONTROL traffic */ - type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; - if (USB_ENDPOINT_XFER_CONTROL == type) - return 0; - - /* some other naming convention */ - if ('e' != ep->name[0]) - return 0; - - /* type-restriction: "-iso", "-bulk", or "-int". - * direction-restriction: "in", "out". - */ - if ('-' != ep->name[2]) { - tmp = strrchr (ep->name, '-'); - if (tmp) { - switch (type) { - case USB_ENDPOINT_XFER_INT: - /* bulk endpoints handle interrupt transfers, - * except the toggle-quirky iso-synch kind - */ - if ('s' == tmp[2]) // == "-iso" - return 0; - /* for now, avoid PXA "interrupt-in"; - * it's documented as never using DATA1. - */ - if (gadget_is_pxa (gadget) - && 'i' == tmp [1]) - return 0; - break; - case USB_ENDPOINT_XFER_BULK: - if ('b' != tmp[1]) // != "-bulk" - return 0; - break; - case USB_ENDPOINT_XFER_ISOC: - if ('s' != tmp[2]) // != "-iso" - return 0; - } - } else { - tmp = ep->name + strlen (ep->name); - } - - /* direction-restriction: "..in-..", "out-.." */ - tmp--; - if (!isdigit (*tmp)) { - if (desc->bEndpointAddress & USB_DIR_IN) { - if ('n' != *tmp) - return 0; - } else { - if ('t' != *tmp) - return 0; - } - } - } - - /* - * Get the number of required streams from the EP companion - * descriptor and see if the EP matches it - */ - if (usb_endpoint_xfer_bulk(desc)) { - if (ep_comp && gadget->max_speed >= USB_SPEED_SUPER) { - num_req_streams = ep_comp->bmAttributes & 0x1f; - if (num_req_streams > ep->max_streams) - return 0; - } - - } - - /* - * If the protocol driver hasn't yet decided on wMaxPacketSize - * and wants to know the maximum possible, provide the info. - */ - if (desc->wMaxPacketSize == 0) - desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket); - - /* endpoint maxpacket size is an input parameter, except for bulk - * where it's an output parameter representing the full speed limit. - * the usb spec fixes high speed bulk maxpacket at 512 bytes. - */ - max = 0x7ff & usb_endpoint_maxp(desc); - switch (type) { - case USB_ENDPOINT_XFER_INT: - /* INT: limit 64 bytes full speed, 1024 high/super speed */ - if (!gadget_is_dualspeed(gadget) && max > 64) - return 0; - /* FALLTHROUGH */ - - case USB_ENDPOINT_XFER_ISOC: - /* ISO: limit 1023 bytes full speed, 1024 high/super speed */ - if (ep->maxpacket < max) - return 0; - if (!gadget_is_dualspeed(gadget) && max > 1023) - return 0; - - /* BOTH: "high bandwidth" works only at high speed */ - if ((desc->wMaxPacketSize & cpu_to_le16(3<<11))) { - if (!gadget_is_dualspeed(gadget)) - return 0; - /* configure your hardware with enough buffering!! */ - } - break; - } - - /* MATCH!! */ - - /* report address */ - desc->bEndpointAddress &= USB_DIR_IN; - if (isdigit (ep->name [2])) { - u8 num = simple_strtoul (&ep->name [2], NULL, 10); - desc->bEndpointAddress |= num; -#ifdef MANY_ENDPOINTS - } else if (desc->bEndpointAddress & USB_DIR_IN) { - if (++in_epnum > 15) - return 0; - desc->bEndpointAddress = USB_DIR_IN | in_epnum; -#endif - } else { - if (++epnum > 15) - return 0; - desc->bEndpointAddress |= epnum; - } - - /* report (variable) full speed bulk maxpacket */ - if ((USB_ENDPOINT_XFER_BULK == type) && !ep_comp) { - int size = ep->maxpacket; - - /* min() doesn't work on bitfields with gcc-3.5 */ - if (size > 64) - size = 64; - desc->wMaxPacketSize = cpu_to_le16(size); - } - ep->address = desc->bEndpointAddress; - return 1; -} - -static struct usb_ep * -find_ep (struct usb_gadget *gadget, const char *name) -{ - struct usb_ep *ep; - - list_for_each_entry (ep, &gadget->ep_list, ep_list) { - if (0 == strcmp (ep->name, name)) - return ep; - } - return NULL; -} - -/** - * usb_ep_autoconfig_ss() - choose an endpoint matching the ep - * descriptor and ep companion descriptor - * @gadget: The device to which the endpoint must belong. - * @desc: Endpoint descriptor, with endpoint direction and transfer mode - * initialized. For periodic transfers, the maximum packet - * size must also be initialized. This is modified on - * success. - * @ep_comp: Endpoint companion descriptor, with the required - * number of streams. Will be modified when the chosen EP - * supports a different number of streams. - * - * This routine replaces the usb_ep_autoconfig when needed - * superspeed enhancments. If such enhancemnets are required, - * the FD should call usb_ep_autoconfig_ss directly and provide - * the additional ep_comp parameter. - * - * By choosing an endpoint to use with the specified descriptor, - * this routine simplifies writing gadget drivers that work with - * multiple USB device controllers. The endpoint would be - * passed later to usb_ep_enable(), along with some descriptor. - * - * That second descriptor won't always be the same as the first one. - * For example, isochronous endpoints can be autoconfigured for high - * bandwidth, and then used in several lower bandwidth altsettings. - * Also, high and full speed descriptors will be different. - * - * Be sure to examine and test the results of autoconfiguration - * on your hardware. This code may not make the best choices - * about how to use the USB controller, and it can't know all - * the restrictions that may apply. Some combinations of driver - * and hardware won't be able to autoconfigure. - * - * On success, this returns an un-claimed usb_ep, and modifies the endpoint - * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value - * is initialized as if the endpoint were used at full speed and - * the bmAttribute field in the ep companion descriptor is - * updated with the assigned number of streams if it is - * different from the original value. To prevent the endpoint - * from being returned by a later autoconfig call, claim it by - * assigning ep->driver_data to some non-null value. - * - * On failure, this returns a null endpoint descriptor. - */ -struct usb_ep *usb_ep_autoconfig_ss( - struct usb_gadget *gadget, - struct usb_endpoint_descriptor *desc, - struct usb_ss_ep_comp_descriptor *ep_comp -) -{ - struct usb_ep *ep; - u8 type; - - type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; - - /* First, apply chip-specific "best usage" knowledge. - * This might make a good usb_gadget_ops hook ... - */ - if (gadget_is_net2280 (gadget) && type == USB_ENDPOINT_XFER_INT) { - /* ep-e, ep-f are PIO with only 64 byte fifos */ - ep = find_ep (gadget, "ep-e"); - if (ep && ep_matches(gadget, ep, desc, ep_comp)) - goto found_ep; - ep = find_ep (gadget, "ep-f"); - if (ep && ep_matches(gadget, ep, desc, ep_comp)) - goto found_ep; - - } else if (gadget_is_goku (gadget)) { - if (USB_ENDPOINT_XFER_INT == type) { - /* single buffering is enough */ - ep = find_ep(gadget, "ep3-bulk"); - if (ep && ep_matches(gadget, ep, desc, ep_comp)) - goto found_ep; - } else if (USB_ENDPOINT_XFER_BULK == type - && (USB_DIR_IN & desc->bEndpointAddress)) { - /* DMA may be available */ - ep = find_ep(gadget, "ep2-bulk"); - if (ep && ep_matches(gadget, ep, desc, - ep_comp)) - goto found_ep; - } - -#ifdef CONFIG_BLACKFIN - } else if (gadget_is_musbhdrc(gadget)) { - if ((USB_ENDPOINT_XFER_BULK == type) || - (USB_ENDPOINT_XFER_ISOC == type)) { - if (USB_DIR_IN & desc->bEndpointAddress) - ep = find_ep (gadget, "ep5in"); - else - ep = find_ep (gadget, "ep6out"); - } else if (USB_ENDPOINT_XFER_INT == type) { - if (USB_DIR_IN & desc->bEndpointAddress) - ep = find_ep(gadget, "ep1in"); - else - ep = find_ep(gadget, "ep2out"); - } else - ep = NULL; - if (ep && ep_matches(gadget, ep, desc, ep_comp)) - goto found_ep; -#endif - } - - /* Second, look at endpoints until an unclaimed one looks usable */ - list_for_each_entry (ep, &gadget->ep_list, ep_list) { - if (ep_matches(gadget, ep, desc, ep_comp)) - goto found_ep; - } - - /* Fail */ - return NULL; -found_ep: - ep->desc = NULL; - ep->comp_desc = NULL; - return ep; -} - -/** - * usb_ep_autoconfig() - choose an endpoint matching the - * descriptor - * @gadget: The device to which the endpoint must belong. - * @desc: Endpoint descriptor, with endpoint direction and transfer mode - * initialized. For periodic transfers, the maximum packet - * size must also be initialized. This is modified on success. - * - * By choosing an endpoint to use with the specified descriptor, this - * routine simplifies writing gadget drivers that work with multiple - * USB device controllers. The endpoint would be passed later to - * usb_ep_enable(), along with some descriptor. - * - * That second descriptor won't always be the same as the first one. - * For example, isochronous endpoints can be autoconfigured for high - * bandwidth, and then used in several lower bandwidth altsettings. - * Also, high and full speed descriptors will be different. - * - * Be sure to examine and test the results of autoconfiguration on your - * hardware. This code may not make the best choices about how to use the - * USB controller, and it can't know all the restrictions that may apply. - * Some combinations of driver and hardware won't be able to autoconfigure. - * - * On success, this returns an un-claimed usb_ep, and modifies the endpoint - * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value - * is initialized as if the endpoint were used at full speed. To prevent - * the endpoint from being returned by a later autoconfig call, claim it - * by assigning ep->driver_data to some non-null value. - * - * On failure, this returns a null endpoint descriptor. - */ -struct usb_ep *usb_ep_autoconfig( - struct usb_gadget *gadget, - struct usb_endpoint_descriptor *desc -) -{ - return usb_ep_autoconfig_ss(gadget, desc, NULL); -} - - -/** - * usb_ep_autoconfig_reset - reset endpoint autoconfig state - * @gadget: device for which autoconfig state will be reset - * - * Use this for devices where one configuration may need to assign - * endpoint resources very differently from the next one. It clears - * state such as ep->driver_data and the record of assigned endpoints - * used by usb_ep_autoconfig(). - */ -void usb_ep_autoconfig_reset (struct usb_gadget *gadget) -{ - struct usb_ep *ep; - - list_for_each_entry (ep, &gadget->ep_list, ep_list) { - ep->driver_data = NULL; - } -#ifdef MANY_ENDPOINTS - in_epnum = 0; -#endif - epnum = 0; -} - |