diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/usb/gadget/composite.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/usb/gadget/composite.c | 1091 |
1 files changed, 0 insertions, 1091 deletions
diff --git a/qemu/roms/u-boot/drivers/usb/gadget/composite.c b/qemu/roms/u-boot/drivers/usb/gadget/composite.c deleted file mode 100644 index 7bd25629c..000000000 --- a/qemu/roms/u-boot/drivers/usb/gadget/composite.c +++ /dev/null @@ -1,1091 +0,0 @@ -/* - * composite.c - infrastructure for Composite USB Gadgets - * - * Copyright (C) 2006-2008 David Brownell - * U-boot porting: Lukasz Majewski <l.majewski@samsung.com> - * - * SPDX-License-Identifier: GPL-2.0+ - */ -#undef DEBUG - -#include <linux/bitops.h> -#include <linux/usb/composite.h> - -#define USB_BUFSIZ 4096 - -static struct usb_composite_driver *composite; - -/** - * usb_add_function() - add a function to a configuration - * @config: the configuration - * @function: the function being added - * Context: single threaded during gadget setup - * - * After initialization, each configuration must have one or more - * functions added to it. Adding a function involves calling its @bind() - * method to allocate resources such as interface and string identifiers - * and endpoints. - * - * This function returns the value of the function's bind(), which is - * zero for success else a negative errno value. - */ -int usb_add_function(struct usb_configuration *config, - struct usb_function *function) -{ - int value = -EINVAL; - - debug("adding '%s'/%p to config '%s'/%p\n", - function->name, function, - config->label, config); - - if (!function->set_alt || !function->disable) - goto done; - - function->config = config; - list_add_tail(&function->list, &config->functions); - - if (function->bind) { - value = function->bind(config, function); - if (value < 0) { - list_del(&function->list); - function->config = NULL; - } - } else - value = 0; - - if (!config->fullspeed && function->descriptors) - config->fullspeed = 1; - if (!config->highspeed && function->hs_descriptors) - config->highspeed = 1; - -done: - if (value) - debug("adding '%s'/%p --> %d\n", - function->name, function, value); - return value; -} - -/** - * usb_function_deactivate - prevent function and gadget enumeration - * @function: the function that isn't yet ready to respond - * - * Blocks response of the gadget driver to host enumeration by - * preventing the data line pullup from being activated. This is - * normally called during @bind() processing to change from the - * initial "ready to respond" state, or when a required resource - * becomes available. - * - * For example, drivers that serve as a passthrough to a userspace - * daemon can block enumeration unless that daemon (such as an OBEX, - * MTP, or print server) is ready to handle host requests. - * - * Not all systems support software control of their USB peripheral - * data pullups. - * - * Returns zero on success, else negative errno. - */ -int usb_function_deactivate(struct usb_function *function) -{ - struct usb_composite_dev *cdev = function->config->cdev; - int status = 0; - - if (cdev->deactivations == 0) - status = usb_gadget_disconnect(cdev->gadget); - if (status == 0) - cdev->deactivations++; - - return status; -} - -/** - * usb_function_activate - allow function and gadget enumeration - * @function: function on which usb_function_activate() was called - * - * Reverses effect of usb_function_deactivate(). If no more functions - * are delaying their activation, the gadget driver will respond to - * host enumeration procedures. - * - * Returns zero on success, else negative errno. - */ -int usb_function_activate(struct usb_function *function) -{ - struct usb_composite_dev *cdev = function->config->cdev; - int status = 0; - - if (cdev->deactivations == 0) - status = -EINVAL; - else { - cdev->deactivations--; - if (cdev->deactivations == 0) - status = usb_gadget_connect(cdev->gadget); - } - - return status; -} - -/** - * usb_interface_id() - allocate an unused interface ID - * @config: configuration associated with the interface - * @function: function handling the interface - * Context: single threaded during gadget setup - * - * usb_interface_id() is called from usb_function.bind() callbacks to - * allocate new interface IDs. The function driver will then store that - * ID in interface, association, CDC union, and other descriptors. It - * will also handle any control requests targetted at that interface, - * particularly changing its altsetting via set_alt(). There may - * also be class-specific or vendor-specific requests to handle. - * - * All interface identifier should be allocated using this routine, to - * ensure that for example different functions don't wrongly assign - * different meanings to the same identifier. Note that since interface - * identifers are configuration-specific, functions used in more than - * one configuration (or more than once in a given configuration) need - * multiple versions of the relevant descriptors. - * - * Returns the interface ID which was allocated; or -ENODEV if no - * more interface IDs can be allocated. - */ -int usb_interface_id(struct usb_configuration *config, - struct usb_function *function) -{ - unsigned char id = config->next_interface_id; - - if (id < MAX_CONFIG_INTERFACES) { - config->interface[id] = function; - config->next_interface_id = id + 1; - return id; - } - return -ENODEV; -} - -static int config_buf(struct usb_configuration *config, - enum usb_device_speed speed, void *buf, u8 type) -{ - int len = USB_BUFSIZ - USB_DT_CONFIG_SIZE; - void *next = buf + USB_DT_CONFIG_SIZE; - struct usb_descriptor_header **descriptors; - struct usb_config_descriptor *c = buf; - int status; - struct usb_function *f; - - /* write the config descriptor */ - c = buf; - c->bLength = USB_DT_CONFIG_SIZE; - c->bDescriptorType = type; - - c->bNumInterfaces = config->next_interface_id; - c->bConfigurationValue = config->bConfigurationValue; - c->iConfiguration = config->iConfiguration; - c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes; - c->bMaxPower = config->bMaxPower ? : (CONFIG_USB_GADGET_VBUS_DRAW / 2); - - /* There may be e.g. OTG descriptors */ - if (config->descriptors) { - status = usb_descriptor_fillbuf(next, len, - config->descriptors); - if (status < 0) - return status; - len -= status; - next += status; - } - - /* add each function's descriptors */ - list_for_each_entry(f, &config->functions, list) { - if (speed == USB_SPEED_HIGH) - descriptors = f->hs_descriptors; - else - descriptors = f->descriptors; - if (!descriptors) - continue; - status = usb_descriptor_fillbuf(next, len, - (const struct usb_descriptor_header **) descriptors); - if (status < 0) - return status; - len -= status; - next += status; - } - - len = next - buf; - c->wTotalLength = cpu_to_le16(len); - return len; -} - -static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) -{ - enum usb_device_speed speed = USB_SPEED_UNKNOWN; - struct usb_gadget *gadget = cdev->gadget; - u8 type = w_value >> 8; - int hs = 0; - struct usb_configuration *c; - - if (gadget_is_dualspeed(gadget)) { - if (gadget->speed == USB_SPEED_HIGH) - hs = 1; - if (type == USB_DT_OTHER_SPEED_CONFIG) - hs = !hs; - if (hs) - speed = USB_SPEED_HIGH; - } - - w_value &= 0xff; - list_for_each_entry(c, &cdev->configs, list) { - if (speed == USB_SPEED_HIGH) { - if (!c->highspeed) - continue; - } else { - if (!c->fullspeed) - continue; - } - if (w_value == 0) - return config_buf(c, speed, cdev->req->buf, type); - w_value--; - } - return -EINVAL; -} - -static int count_configs(struct usb_composite_dev *cdev, unsigned type) -{ - struct usb_gadget *gadget = cdev->gadget; - unsigned count = 0; - int hs = 0; - struct usb_configuration *c; - - if (gadget_is_dualspeed(gadget)) { - if (gadget->speed == USB_SPEED_HIGH) - hs = 1; - if (type == USB_DT_DEVICE_QUALIFIER) - hs = !hs; - } - list_for_each_entry(c, &cdev->configs, list) { - /* ignore configs that won't work at this speed */ - if (hs) { - if (!c->highspeed) - continue; - } else { - if (!c->fullspeed) - continue; - } - count++; - } - return count; -} - -static void device_qual(struct usb_composite_dev *cdev) -{ - struct usb_qualifier_descriptor *qual = cdev->req->buf; - - qual->bLength = sizeof(*qual); - qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER; - /* POLICY: same bcdUSB and device type info at both speeds */ - qual->bcdUSB = cdev->desc.bcdUSB; - qual->bDeviceClass = cdev->desc.bDeviceClass; - qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; - qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; - /* ASSUME same EP0 fifo size at both speeds */ - qual->bMaxPacketSize0 = cdev->desc.bMaxPacketSize0; - qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); - qual->bRESERVED = 0; -} - -static void reset_config(struct usb_composite_dev *cdev) -{ - struct usb_function *f; - - debug("%s:\n", __func__); - - list_for_each_entry(f, &cdev->config->functions, list) { - if (f->disable) - f->disable(f); - - bitmap_zero(f->endpoints, 32); - } - cdev->config = NULL; -} - -static int set_config(struct usb_composite_dev *cdev, - const struct usb_ctrlrequest *ctrl, unsigned number) -{ - struct usb_gadget *gadget = cdev->gadget; - unsigned power = gadget_is_otg(gadget) ? 8 : 100; - struct usb_descriptor_header **descriptors; - int result = -EINVAL; - struct usb_endpoint_descriptor *ep; - struct usb_configuration *c = NULL; - int addr; - int tmp; - struct usb_function *f; - - if (cdev->config) - reset_config(cdev); - - if (number) { - list_for_each_entry(c, &cdev->configs, list) { - if (c->bConfigurationValue == number) { - result = 0; - break; - } - } - if (result < 0) - goto done; - } else - result = 0; - - debug("%s: %s speed config #%d: %s\n", __func__, - ({ char *speed; - switch (gadget->speed) { - case USB_SPEED_LOW: - speed = "low"; - break; - case USB_SPEED_FULL: - speed = "full"; - break; - case USB_SPEED_HIGH: - speed = "high"; - break; - default: - speed = "?"; - break; - }; - speed; - }), number, c ? c->label : "unconfigured"); - - if (!c) - goto done; - - cdev->config = c; - - /* Initialize all interfaces by setting them to altsetting zero. */ - for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { - f = c->interface[tmp]; - if (!f) - break; - - /* - * Record which endpoints are used by the function. This is used - * to dispatch control requests targeted at that endpoint to the - * function's setup callback instead of the current - * configuration's setup callback. - */ - if (gadget->speed == USB_SPEED_HIGH) - descriptors = f->hs_descriptors; - else - descriptors = f->descriptors; - - for (; *descriptors; ++descriptors) { - if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT) - continue; - - ep = (struct usb_endpoint_descriptor *)*descriptors; - addr = ((ep->bEndpointAddress & 0x80) >> 3) - | (ep->bEndpointAddress & 0x0f); - __set_bit(addr, f->endpoints); - } - - result = f->set_alt(f, tmp, 0); - if (result < 0) { - debug("interface %d (%s/%p) alt 0 --> %d\n", - tmp, f->name, f, result); - - reset_config(cdev); - goto done; - } - } - - /* when we return, be sure our power usage is valid */ - power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW; -done: - usb_gadget_vbus_draw(gadget, power); - return result; -} - -/** - * usb_add_config() - add a configuration to a device. - * @cdev: wraps the USB gadget - * @config: the configuration, with bConfigurationValue assigned - * Context: single threaded during gadget setup - * - * One of the main tasks of a composite driver's bind() routine is to - * add each of the configurations it supports, using this routine. - * - * This function returns the value of the configuration's bind(), which - * is zero for success else a negative errno value. Binding configurations - * assigns global resources including string IDs, and per-configuration - * resources such as interface IDs and endpoints. - */ -int usb_add_config(struct usb_composite_dev *cdev, - struct usb_configuration *config) -{ - int status = -EINVAL; - struct usb_configuration *c; - struct usb_function *f; - unsigned int i; - - debug("%s: adding config #%u '%s'/%p\n", __func__, - config->bConfigurationValue, - config->label, config); - - if (!config->bConfigurationValue || !config->bind) - goto done; - - /* Prevent duplicate configuration identifiers */ - list_for_each_entry(c, &cdev->configs, list) { - if (c->bConfigurationValue == config->bConfigurationValue) { - status = -EBUSY; - goto done; - } - } - - config->cdev = cdev; - list_add_tail(&config->list, &cdev->configs); - - INIT_LIST_HEAD(&config->functions); - config->next_interface_id = 0; - - status = config->bind(config); - if (status < 0) { - list_del(&config->list); - config->cdev = NULL; - } else { - debug("cfg %d/%p speeds:%s%s\n", - config->bConfigurationValue, config, - config->highspeed ? " high" : "", - config->fullspeed - ? (gadget_is_dualspeed(cdev->gadget) - ? " full" - : " full/low") - : ""); - - for (i = 0; i < MAX_CONFIG_INTERFACES; i++) { - f = config->interface[i]; - if (!f) - continue; - debug("%s: interface %d = %s/%p\n", - __func__, i, f->name, f); - } - } - - usb_ep_autoconfig_reset(cdev->gadget); - -done: - if (status) - debug("added config '%s'/%u --> %d\n", config->label, - config->bConfigurationValue, status); - return status; -} - -/* - * We support strings in multiple languages ... string descriptor zero - * says which languages are supported. The typical case will be that - * only one language (probably English) is used, with I18N handled on - * the host side. - */ - -static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) -{ - const struct usb_gadget_strings *s; - u16 language; - __le16 *tmp; - - while (*sp) { - s = *sp; - language = cpu_to_le16(s->language); - for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) { - if (*tmp == language) - goto repeat; - } - *tmp++ = language; -repeat: - sp++; - } -} - -static int lookup_string( - struct usb_gadget_strings **sp, - void *buf, - u16 language, - int id -) -{ - int value; - struct usb_gadget_strings *s; - - while (*sp) { - s = *sp++; - if (s->language != language) - continue; - value = usb_gadget_get_string(s, id, buf); - if (value > 0) - return value; - } - return -EINVAL; -} - -static int get_string(struct usb_composite_dev *cdev, - void *buf, u16 language, int id) -{ - struct usb_string_descriptor *s = buf; - struct usb_gadget_strings **sp; - int len; - struct usb_configuration *c; - struct usb_function *f; - - /* - * Yes, not only is USB's I18N support probably more than most - * folk will ever care about ... also, it's all supported here. - * (Except for UTF8 support for Unicode's "Astral Planes".) - */ - - /* 0 == report all available language codes */ - if (id == 0) { - memset(s, 0, 256); - s->bDescriptorType = USB_DT_STRING; - - sp = composite->strings; - if (sp) - collect_langs(sp, s->wData); - - list_for_each_entry(c, &cdev->configs, list) { - sp = c->strings; - if (sp) - collect_langs(sp, s->wData); - - list_for_each_entry(f, &c->functions, list) { - sp = f->strings; - if (sp) - collect_langs(sp, s->wData); - } - } - - for (len = 0; len <= 126 && s->wData[len]; len++) - continue; - if (!len) - return -EINVAL; - - s->bLength = 2 * (len + 1); - return s->bLength; - } - - /* - * Otherwise, look up and return a specified string. String IDs - * are device-scoped, so we look up each string table we're told - * about. These lookups are infrequent; simpler-is-better here. - */ - if (composite->strings) { - len = lookup_string(composite->strings, buf, language, id); - if (len > 0) - return len; - } - list_for_each_entry(c, &cdev->configs, list) { - if (c->strings) { - len = lookup_string(c->strings, buf, language, id); - if (len > 0) - return len; - } - list_for_each_entry(f, &c->functions, list) { - if (!f->strings) - continue; - len = lookup_string(f->strings, buf, language, id); - if (len > 0) - return len; - } - } - return -EINVAL; -} - -/** - * usb_string_id() - allocate an unused string ID - * @cdev: the device whose string descriptor IDs are being allocated - * Context: single threaded during gadget setup - * - * @usb_string_id() is called from bind() callbacks to allocate - * string IDs. Drivers for functions, configurations, or gadgets will - * then store that ID in the appropriate descriptors and string table. - * - * All string identifier should be allocated using this, - * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure - * that for example different functions don't wrongly assign different - * meanings to the same identifier. - */ -int usb_string_id(struct usb_composite_dev *cdev) -{ - if (cdev->next_string_id < 254) { - /* - * string id 0 is reserved by USB spec for list of - * supported languages - * 255 reserved as well? -- mina86 - */ - cdev->next_string_id++; - return cdev->next_string_id; - } - return -ENODEV; -} - -/** - * usb_string_ids() - allocate unused string IDs in batch - * @cdev: the device whose string descriptor IDs are being allocated - * @str: an array of usb_string objects to assign numbers to - * Context: single threaded during gadget setup - * - * @usb_string_ids() is called from bind() callbacks to allocate - * string IDs. Drivers for functions, configurations, or gadgets will - * then copy IDs from the string table to the appropriate descriptors - * and string table for other languages. - * - * All string identifier should be allocated using this, - * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for - * example different functions don't wrongly assign different meanings - * to the same identifier. - */ -int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str) -{ - u8 next = cdev->next_string_id; - - for (; str->s; ++str) { - if (next >= 254) - return -ENODEV; - str->id = ++next; - } - - cdev->next_string_id = next; - - return 0; -} - -/** - * usb_string_ids_n() - allocate unused string IDs in batch - * @c: the device whose string descriptor IDs are being allocated - * @n: number of string IDs to allocate - * Context: single threaded during gadget setup - * - * Returns the first requested ID. This ID and next @n-1 IDs are now - * valid IDs. At least provided that @n is non-zero because if it - * is, returns last requested ID which is now very useful information. - * - * @usb_string_ids_n() is called from bind() callbacks to allocate - * string IDs. Drivers for functions, configurations, or gadgets will - * then store that ID in the appropriate descriptors and string table. - * - * All string identifier should be allocated using this, - * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for - * example different functions don't wrongly assign different meanings - * to the same identifier. - */ -int usb_string_ids_n(struct usb_composite_dev *c, unsigned n) -{ - u8 next = c->next_string_id; - - if (n > 254 || next + n > 254) - return -ENODEV; - - c->next_string_id += n; - return next + 1; -} - -static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) -{ - if (req->status || req->actual != req->length) - debug("%s: setup complete --> %d, %d/%d\n", __func__, - req->status, req->actual, req->length); -} - -/* - * The setup() callback implements all the ep0 functionality that's - * not handled lower down, in hardware or the hardware driver(like - * device and endpoint feature flags, and their status). It's all - * housekeeping for the gadget function we're implementing. Most of - * the work is in config and function specific setup. - */ -static int -composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) -{ - u16 w_length = le16_to_cpu(ctrl->wLength); - u16 w_index = le16_to_cpu(ctrl->wIndex); - u16 w_value = le16_to_cpu(ctrl->wValue); - struct usb_composite_dev *cdev = get_gadget_data(gadget); - u8 intf = w_index & 0xFF; - int value = -EOPNOTSUPP; - struct usb_request *req = cdev->req; - struct usb_function *f = NULL; - int standard; - u8 endp; - struct usb_configuration *c; - - /* - * partial re-init of the response message; the function or the - * gadget might need to intercept e.g. a control-OUT completion - * when we delegate to it. - */ - req->zero = 0; - req->complete = composite_setup_complete; - req->length = USB_BUFSIZ; - gadget->ep0->driver_data = cdev; - standard = (ctrl->bRequestType & USB_TYPE_MASK) - == USB_TYPE_STANDARD; - if (!standard) - goto unknown; - - switch (ctrl->bRequest) { - - /* we handle all standard USB descriptors */ - case USB_REQ_GET_DESCRIPTOR: - if (ctrl->bRequestType != USB_DIR_IN) - goto unknown; - switch (w_value >> 8) { - - case USB_DT_DEVICE: - cdev->desc.bNumConfigurations = - count_configs(cdev, USB_DT_DEVICE); - value = min(w_length, (u16) sizeof cdev->desc); - memcpy(req->buf, &cdev->desc, value); - break; - case USB_DT_DEVICE_QUALIFIER: - if (!gadget_is_dualspeed(gadget)) - break; - device_qual(cdev); - value = min(w_length, - sizeof(struct usb_qualifier_descriptor)); - break; - case USB_DT_OTHER_SPEED_CONFIG: - if (!gadget_is_dualspeed(gadget)) - break; - - case USB_DT_CONFIG: - value = config_desc(cdev, w_value); - if (value >= 0) - value = min(w_length, (u16) value); - break; - case USB_DT_STRING: - value = get_string(cdev, req->buf, - w_index, w_value & 0xff); - if (value >= 0) - value = min(w_length, (u16) value); - break; - default: - goto unknown; - } - break; - - /* any number of configs can work */ - case USB_REQ_SET_CONFIGURATION: - if (ctrl->bRequestType != 0) - goto unknown; - if (gadget_is_otg(gadget)) { - if (gadget->a_hnp_support) - debug("HNP available\n"); - else if (gadget->a_alt_hnp_support) - debug("HNP on another port\n"); - else - debug("HNP inactive\n"); - } - - value = set_config(cdev, ctrl, w_value); - break; - case USB_REQ_GET_CONFIGURATION: - if (ctrl->bRequestType != USB_DIR_IN) - goto unknown; - if (cdev->config) - *(u8 *)req->buf = cdev->config->bConfigurationValue; - else - *(u8 *)req->buf = 0; - value = min(w_length, (u16) 1); - break; - - /* - * function drivers must handle get/set altsetting; if there's - * no get() method, we know only altsetting zero works. - */ - case USB_REQ_SET_INTERFACE: - if (ctrl->bRequestType != USB_RECIP_INTERFACE) - goto unknown; - if (!cdev->config || w_index >= MAX_CONFIG_INTERFACES) - break; - f = cdev->config->interface[intf]; - if (!f) - break; - if (w_value && !f->set_alt) - break; - value = f->set_alt(f, w_index, w_value); - break; - case USB_REQ_GET_INTERFACE: - if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) - goto unknown; - if (!cdev->config || w_index >= MAX_CONFIG_INTERFACES) - break; - f = cdev->config->interface[intf]; - if (!f) - break; - /* lots of interfaces only need altsetting zero... */ - value = f->get_alt ? f->get_alt(f, w_index) : 0; - if (value < 0) - break; - *((u8 *)req->buf) = value; - value = min(w_length, (u16) 1); - break; - default: -unknown: - debug("non-core control req%02x.%02x v%04x i%04x l%d\n", - ctrl->bRequestType, ctrl->bRequest, - w_value, w_index, w_length); - - /* - * functions always handle their interfaces and endpoints... - * punt other recipients (other, WUSB, ...) to the current - * configuration code. - */ - switch (ctrl->bRequestType & USB_RECIP_MASK) { - case USB_RECIP_INTERFACE: - f = cdev->config->interface[intf]; - break; - - case USB_RECIP_ENDPOINT: - endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); - list_for_each_entry(f, &cdev->config->functions, list) { - if (test_bit(endp, f->endpoints)) - break; - } - if (&f->list == &cdev->config->functions) - f = NULL; - break; - /* - * dfu-util (version 0.5) sets bmRequestType.Receipent = Device - * for non-standard request (w_value = 0x21, - * bRequest = GET_DESCRIPTOR in this case). - * When only one interface is registered (as it is done now), - * then this request shall be handled as it was requested for - * interface. - * - * In the below code it is checked if only one interface is - * present and proper function for it is extracted. Due to that - * function's setup (f->setup) is called to handle this - * special non-standard request. - */ - case USB_RECIP_DEVICE: - debug("cdev->config->next_interface_id: %d intf: %d\n", - cdev->config->next_interface_id, intf); - if (cdev->config->next_interface_id == 1) - f = cdev->config->interface[intf]; - break; - } - - if (f && f->setup) - value = f->setup(f, ctrl); - else { - c = cdev->config; - if (c && c->setup) - value = c->setup(c, ctrl); - } - - goto done; - } - - /* respond with data transfer before status phase? */ - if (value >= 0) { - req->length = value; - req->zero = value < w_length; - value = usb_ep_queue(gadget->ep0, req, GFP_KERNEL); - if (value < 0) { - debug("ep_queue --> %d\n", value); - req->status = 0; - composite_setup_complete(gadget->ep0, req); - } - } - -done: - /* device either stalls (value < 0) or reports success */ - return value; -} - -static void composite_disconnect(struct usb_gadget *gadget) -{ - struct usb_composite_dev *cdev = get_gadget_data(gadget); - - if (cdev->config) - reset_config(cdev); - if (composite->disconnect) - composite->disconnect(cdev); -} - -static void composite_unbind(struct usb_gadget *gadget) -{ - struct usb_composite_dev *cdev = get_gadget_data(gadget); - struct usb_configuration *c; - struct usb_function *f; - - /* - * composite_disconnect() must already have been called - * by the underlying peripheral controller driver! - * so there's no i/o concurrency that could affect the - * state protected by cdev->lock. - */ - BUG_ON(cdev->config); - - while (!list_empty(&cdev->configs)) { - c = list_first_entry(&cdev->configs, - struct usb_configuration, list); - while (!list_empty(&c->functions)) { - f = list_first_entry(&c->functions, - struct usb_function, list); - list_del(&f->list); - if (f->unbind) { - debug("unbind function '%s'/%p\n", - f->name, f); - f->unbind(c, f); - } - } - list_del(&c->list); - if (c->unbind) { - debug("unbind config '%s'/%p\n", c->label, c); - c->unbind(c); - } - } - if (composite->unbind) - composite->unbind(cdev); - - if (cdev->req) { - kfree(cdev->req->buf); - usb_ep_free_request(gadget->ep0, cdev->req); - } - kfree(cdev); - set_gadget_data(gadget, NULL); - - composite = NULL; -} - -static int composite_bind(struct usb_gadget *gadget) -{ - int status = -ENOMEM; - struct usb_composite_dev *cdev; - - cdev = calloc(sizeof *cdev, 1); - if (!cdev) - return status; - - cdev->gadget = gadget; - set_gadget_data(gadget, cdev); - INIT_LIST_HEAD(&cdev->configs); - - /* preallocate control response and buffer */ - cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); - if (!cdev->req) - goto fail; - cdev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, USB_BUFSIZ); - if (!cdev->req->buf) - goto fail; - cdev->req->complete = composite_setup_complete; - gadget->ep0->driver_data = cdev; - - cdev->bufsiz = USB_BUFSIZ; - cdev->driver = composite; - - usb_gadget_set_selfpowered(gadget); - usb_ep_autoconfig_reset(cdev->gadget); - - status = composite->bind(cdev); - if (status < 0) - goto fail; - - memcpy(&cdev->desc, composite->dev, - sizeof(struct usb_device_descriptor)); - cdev->desc.bMaxPacketSize0 = gadget->ep0->maxpacket; - - debug("%s: ready\n", composite->name); - return 0; - -fail: - composite_unbind(gadget); - return status; -} - -static void -composite_suspend(struct usb_gadget *gadget) -{ - struct usb_composite_dev *cdev = get_gadget_data(gadget); - struct usb_function *f; - - debug("%s: suspend\n", __func__); - if (cdev->config) { - list_for_each_entry(f, &cdev->config->functions, list) { - if (f->suspend) - f->suspend(f); - } - } - if (composite->suspend) - composite->suspend(cdev); - - cdev->suspended = 1; -} - -static void -composite_resume(struct usb_gadget *gadget) -{ - struct usb_composite_dev *cdev = get_gadget_data(gadget); - struct usb_function *f; - - debug("%s: resume\n", __func__); - if (composite->resume) - composite->resume(cdev); - if (cdev->config) { - list_for_each_entry(f, &cdev->config->functions, list) { - if (f->resume) - f->resume(f); - } - } - - cdev->suspended = 0; -} - -static struct usb_gadget_driver composite_driver = { - .speed = USB_SPEED_HIGH, - - .bind = composite_bind, - .unbind = composite_unbind, - - .setup = composite_setup, - .disconnect = composite_disconnect, - - .suspend = composite_suspend, - .resume = composite_resume, -}; - -/** - * usb_composite_register() - register a composite driver - * @driver: the driver to register - * Context: single threaded during gadget setup - * - * This function is used to register drivers using the composite driver - * framework. The return value is zero, or a negative errno value. - * Those values normally come from the driver's @bind method, which does - * all the work of setting up the driver to match the hardware. - * - * On successful return, the gadget is ready to respond to requests from - * the host, unless one of its components invokes usb_gadget_disconnect() - * while it was binding. That would usually be done in order to wait for - * some userspace participation. - */ -int usb_composite_register(struct usb_composite_driver *driver) -{ - if (!driver || !driver->dev || !driver->bind || composite) - return -EINVAL; - - if (!driver->name) - driver->name = "composite"; - composite = driver; - - return usb_gadget_register_driver(&composite_driver); -} - -/** - * usb_composite_unregister() - unregister a composite driver - * @driver: the driver to unregister - * - * This function is used to unregister drivers using the composite - * driver framework. - */ -void usb_composite_unregister(struct usb_composite_driver *driver) -{ - if (composite != driver) - return; - usb_gadget_unregister_driver(&composite_driver); - composite = NULL; -} |