diff options
Diffstat (limited to 'drivers/usb/gadget/epautoconf.c')
-rw-r--r-- | drivers/usb/gadget/epautoconf.c | 233 |
1 files changed, 153 insertions, 80 deletions
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c index 13ad4792cc..f0f576d708 100644 --- a/drivers/usb/gadget/epautoconf.c +++ b/drivers/usb/gadget/epautoconf.c @@ -7,17 +7,11 @@ * 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. - * - * */ #include <init.h> #include <common.h> + #include <linux/ctype.h> #include <asm/byteorder.h> @@ -26,15 +20,6 @@ #include "gadget_chips.h" -/* we must assign addresses for configurable endpoints (like net2280) */ -static __initdata unsigned epnum; - -// #define MANY_ENDPOINTS -#ifdef MANY_ENDPOINTS -/* more than 15 configurable endpoints */ -static __initdata unsigned in_epnum; -#endif - /* * This should work with endpoints from controller drivers sharing the * same endpoint naming convention. By example: @@ -51,23 +36,26 @@ static __initdata unsigned in_epnum; * NOTE: each endpoint is unidirectional, as specified by its USB * descriptor; and isn't specific to a configuration or altsetting. */ -static int __init +static int ep_matches ( struct usb_gadget *gadget, struct usb_ep *ep, - struct usb_endpoint_descriptor *desc + 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; + type = usb_endpoint_type(desc); if (USB_ENDPOINT_XFER_CONTROL == type) return 0; @@ -120,28 +108,48 @@ ep_matches ( } } + /* + * 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_limit); + /* 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 & le16_to_cpu(desc->wMaxPacketSize); + max = 0x7ff & usb_endpoint_maxp(desc); switch (type) { case USB_ENDPOINT_XFER_INT: - /* INT: limit 64 bytes full speed, 1024 high speed */ - if (!gadget->is_dualspeed && max > 64) + /* 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 speed */ - if (ep->maxpacket < max) + /* ISO: limit 1023 bytes full speed, 1024 high/super speed */ + if (ep->maxpacket_limit < max) return 0; - if (!gadget->is_dualspeed && max > 1023) + 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) + if (!gadget_is_dualspeed(gadget)) return 0; /* configure your hardware with enough buffering!! */ } @@ -155,31 +163,30 @@ ep_matches ( 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) + if (++gadget->in_epnum > 15) return 0; - desc->bEndpointAddress = USB_DIR_IN | in_epnum; -#endif + desc->bEndpointAddress = USB_DIR_IN | gadget->in_epnum; } else { - if (++epnum > 15) + if (++gadget->out_epnum > 15) return 0; - desc->bEndpointAddress |= epnum; + desc->bEndpointAddress |= gadget->out_epnum; } /* report (variable) full speed bulk maxpacket */ - if (USB_ENDPOINT_XFER_BULK == type) { - int size = ep->maxpacket; + if ((USB_ENDPOINT_XFER_BULK == type) && !ep_comp) { + int size = ep->maxpacket_limit; /* 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 * __init +static struct usb_ep * find_ep (struct usb_gadget *gadget, const char *name) { struct usb_ep *ep; @@ -192,38 +199,53 @@ find_ep (struct usb_gadget *gadget, const char *name) } /** - * usb_ep_autoconfig - choose an endpoint matching the descriptor + * 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. + * 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. * - * 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. + * 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. + * 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. + * 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 * __init usb_ep_autoconfig ( +struct usb_ep *usb_ep_autoconfig_ss( struct usb_gadget *gadget, - struct usb_endpoint_descriptor *desc + struct usb_endpoint_descriptor *desc, + struct usb_ss_ep_comp_descriptor *ep_comp ) { struct usb_ep *ep; @@ -237,47 +259,101 @@ struct usb_ep * __init usb_ep_autoconfig ( 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)) - return ep; + 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)) - return ep; + 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)) - return ep; + 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)) - return ep; + ep = find_ep(gadget, "ep2-bulk"); + if (ep && ep_matches(gadget, ep, desc, + ep_comp)) + goto found_ep; } - } else if (gadget_is_sh (gadget) && USB_ENDPOINT_XFER_INT == type) { - /* single buffering is enough; maybe 8 byte fifo is too */ - ep = find_ep (gadget, "ep3in-bulk"); - if (ep && ep_matches (gadget, ep, desc)) - return ep; - - } else if (gadget_is_mq11xx (gadget) && USB_ENDPOINT_XFER_INT == type) { - ep = find_ep (gadget, "ep1-bulk"); - if (ep && ep_matches (gadget, ep, desc)) - return 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)) - return ep; + 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; } +EXPORT_SYMBOL_GPL(usb_ep_autoconfig_ss); + +/** + * 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); +} +EXPORT_SYMBOL_GPL(usb_ep_autoconfig); /** * usb_ep_autoconfig_reset - reset endpoint autoconfig state @@ -288,17 +364,14 @@ struct usb_ep * __init usb_ep_autoconfig ( * state such as ep->driver_data and the record of assigned endpoints * used by usb_ep_autoconfig(). */ -void __init usb_ep_autoconfig_reset (struct usb_gadget *gadget) +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; + gadget->in_epnum = 0; + gadget->out_epnum = 0; } - - +EXPORT_SYMBOL_GPL(usb_ep_autoconfig_reset); |