diff options
Diffstat (limited to 'drivers/usb/gadget/composite.c')
| -rw-r--r-- | drivers/usb/gadget/composite.c | 1182 |
1 files changed, 978 insertions, 204 deletions
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 71d0ecf39c..d6638fe4cd 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -7,12 +7,6 @@ * 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. - * */ /* #define VERBOSE_DEBUG */ @@ -20,10 +14,13 @@ #include <common.h> #include <errno.h> #include <dma.h> +#include <linux/err.h> +#include <linux/bitmap.h> #include <usb/composite.h> +#include <asm/unaligned.h> #include <asm/byteorder.h> -#define CONFIG_USB_GADGET_VBUS_DRAW 2 +static unsigned int usb_gadget_vbus_draw_ma = 2; /* * The code in this file is utility code, used to build a gadget driver @@ -32,24 +29,139 @@ * with the relevant device-wide data. */ -/* big enough to hold our biggest descriptor */ -#define USB_BUFSIZ 512 +static struct usb_gadget_strings **get_containers_gs( + struct usb_gadget_string_container *uc) +{ + return (struct usb_gadget_strings **)uc->stash; +} -static struct usb_composite_driver *composite; +/** + * next_ep_desc() - advance to the next EP descriptor + * @t: currect pointer within descriptor array + * + * Return: next EP descriptor or NULL + * + * Iterate over @t until either EP descriptor found or + * NULL (that indicates end of list) encountered + */ +static struct usb_descriptor_header** +next_ep_desc(struct usb_descriptor_header **t) +{ + for (; *t; t++) { + if ((*t)->bDescriptorType == USB_DT_ENDPOINT) + return t; + } + return NULL; +} -/* Some systems will need runtime overrides for the product identifers - * published in the device descriptor, either numbers or strings or both. - * String parameters are in UTF-8 (superset of ASCII's 7 bit characters). +/* + * for_each_ep_desc()- iterate over endpoint descriptors in the + * descriptors list + * @start: pointer within descriptor array. + * @ep_desc: endpoint descriptor to use as the loop cursor */ +#define for_each_ep_desc(start, ep_desc) \ + for (ep_desc = next_ep_desc(start); \ + ep_desc; ep_desc = next_ep_desc(ep_desc+1)) -static ushort idVendor; -static ushort idProduct; -static ushort bcdDevice; -static char *iManufacturer; -static char *iProduct; -static char *iSerialNumber; +/** + * config_ep_by_speed() - configures the given endpoint + * according to gadget speed. + * @g: pointer to the gadget + * @f: usb function + * @_ep: the endpoint to configure + * + * Return: error code, 0 on success + * + * This function chooses the right descriptors for a given + * endpoint according to gadget speed and saves it in the + * endpoint desc field. If the endpoint already has a descriptor + * assigned to it - overwrites it with currently corresponding + * descriptor. The endpoint maxpacket field is updated according + * to the chosen descriptor. + * Note: the supplied function should hold all the descriptors + * for supported speeds + */ +int config_ep_by_speed(struct usb_gadget *g, + struct usb_function *f, + struct usb_ep *_ep) +{ + struct usb_composite_dev *cdev = get_gadget_data(g); + struct usb_endpoint_descriptor *chosen_desc = NULL; + struct usb_descriptor_header **speed_desc = NULL; -/*-------------------------------------------------------------------------*/ + struct usb_ss_ep_comp_descriptor *comp_desc = NULL; + int want_comp_desc = 0; + + struct usb_descriptor_header **d_spd; /* cursor for speed desc */ + + if (!g || !f || !_ep) + return -EIO; + + /* select desired speed */ + switch (g->speed) { + case USB_SPEED_SUPER: + if (gadget_is_superspeed(g)) { + speed_desc = f->ss_descriptors; + want_comp_desc = 1; + break; + } + /* else: Fall trough */ + case USB_SPEED_HIGH: + if (gadget_is_dualspeed(g)) { + speed_desc = f->hs_descriptors; + break; + } + /* else: fall through */ + default: + speed_desc = f->fs_descriptors; + } + /* find descriptors */ + for_each_ep_desc(speed_desc, d_spd) { + chosen_desc = (struct usb_endpoint_descriptor *)*d_spd; + if (chosen_desc->bEndpointAddress == _ep->address) + goto ep_found; + } + return -EIO; + +ep_found: + /* commit results */ + _ep->maxpacket = usb_endpoint_maxp(chosen_desc); + _ep->desc = chosen_desc; + _ep->comp_desc = NULL; + _ep->maxburst = 0; + _ep->mult = 0; + if (!want_comp_desc) + return 0; + + /* + * Companion descriptor should follow EP descriptor + * USB 3.0 spec, #9.6.7 + */ + comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd); + if (!comp_desc || + (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP)) + return -EIO; + _ep->comp_desc = comp_desc; + if (g->speed == USB_SPEED_SUPER) { + switch (usb_endpoint_type(_ep->desc)) { + case USB_ENDPOINT_XFER_ISOC: + /* mult: bits 1:0 of bmAttributes */ + _ep->mult = comp_desc->bmAttributes & 0x3; + case USB_ENDPOINT_XFER_BULK: + case USB_ENDPOINT_XFER_INT: + _ep->maxburst = comp_desc->bMaxBurst + 1; + break; + default: + if (comp_desc->bMaxBurst != 0) + ERROR(cdev, "ep0 bMaxBurst must be 0\n"); + _ep->maxburst = 1; + break; + } + } + return 0; +} +EXPORT_SYMBOL_GPL(config_ep_by_speed); /** * usb_add_function() - add a function to a configuration @@ -65,7 +177,7 @@ static char *iSerialNumber; * This function returns the value of the function's bind(), which is * zero for success else a negative errno value. */ -int __init usb_add_function(struct usb_configuration *config, +int usb_add_function(struct usb_configuration *config, struct usb_function *function) { int value = -EINVAL; @@ -95,10 +207,12 @@ int __init usb_add_function(struct usb_configuration *config, * as full speed ... it's the function drivers that will need * to avoid bulk and ISO transfers. */ - if (!config->fullspeed && function->descriptors) - config->fullspeed = 1; + if (!config->fullspeed && function->fs_descriptors) + config->fullspeed = true; if (!config->highspeed && function->hs_descriptors) - config->highspeed = 1; + config->highspeed = true; + if (!config->superspeed && function->ss_descriptors) + config->superspeed = true; done: if (value) @@ -106,6 +220,19 @@ done: function->name, function, value); return value; } +EXPORT_SYMBOL_GPL(usb_add_function); + +void usb_remove_function(struct usb_configuration *c, struct usb_function *f) +{ + if (f->disable) + f->disable(f); + + bitmap_zero(f->endpoints, 32); + list_del(&f->list); + if (f->unbind) + f->unbind(c, f); +} +EXPORT_SYMBOL_GPL(usb_remove_function); /** * usb_function_deactivate - prevent function and gadget enumeration @@ -138,6 +265,7 @@ int usb_function_deactivate(struct usb_function *function) return status; } +EXPORT_SYMBOL_GPL(usb_function_deactivate); /** * usb_function_activate - allow function and gadget enumeration @@ -154,7 +282,7 @@ int usb_function_activate(struct usb_function *function) struct usb_composite_dev *cdev = function->config->cdev; int status = 0; - if (cdev->deactivations == 0) + if (WARN_ON(cdev->deactivations == 0)) status = -EINVAL; else { cdev->deactivations--; @@ -164,6 +292,7 @@ int usb_function_activate(struct usb_function *function) return status; } +EXPORT_SYMBOL_GPL(usb_function_activate); /** * usb_interface_id() - allocate an unused interface ID @@ -174,21 +303,21 @@ int usb_function_activate(struct usb_function *function) * 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, + * will also handle any control requests targeted 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 + * identifiers 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 __init usb_interface_id(struct usb_configuration *config, +int usb_interface_id(struct usb_configuration *config, struct usb_function *function) { unsigned id = config->next_interface_id; @@ -200,16 +329,37 @@ int __init usb_interface_id(struct usb_configuration *config, } return -ENODEV; } +EXPORT_SYMBOL_GPL(usb_interface_id); + +static u8 encode_bMaxPower(enum usb_device_speed speed, + struct usb_configuration *c) +{ + unsigned val; + + if (c->MaxPower) + val = c->MaxPower; + else + val = usb_gadget_vbus_draw_ma; + if (!val) + return 0; + switch (speed) { + case USB_SPEED_SUPER: + return DIV_ROUND_UP(val, 8); + default: + return DIV_ROUND_UP(val, 2); + } +} static int config_buf(struct usb_configuration *config, enum usb_device_speed speed, void *buf, u8 type) { - struct usb_config_descriptor *c; + struct usb_config_descriptor *c = buf; void *next = buf + USB_DT_CONFIG_SIZE; - int len = USB_BUFSIZ - USB_DT_CONFIG_SIZE; + int len; struct usb_function *f; int status; + len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE; /* write the config descriptor */ c = buf; c->bLength = USB_DT_CONFIG_SIZE; @@ -219,7 +369,7 @@ static int config_buf(struct usb_configuration *config, 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); + c->bMaxPower = encode_bMaxPower(speed, config); /* There may be e.g. OTG descriptors */ if (config->descriptors) { @@ -235,10 +385,17 @@ static int config_buf(struct usb_configuration *config, list_for_each_entry(f, &config->functions, list) { struct usb_descriptor_header **descriptors; - if (speed == USB_SPEED_HIGH) + switch (speed) { + case USB_SPEED_SUPER: + descriptors = f->ss_descriptors; + break; + case USB_SPEED_HIGH: descriptors = f->hs_descriptors; - else - descriptors = f->descriptors; + break; + default: + descriptors = f->fs_descriptors; + } + if (!descriptors) continue; status = usb_descriptor_fillbuf(next, len, @@ -261,9 +418,10 @@ static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) u8 type = w_value >> 8; enum usb_device_speed speed = USB_SPEED_UNKNOWN; - if (gadget_is_dualspeed(gadget)) { - int hs = 0; - + if (gadget->speed == USB_SPEED_SUPER) + speed = gadget->speed; + else if (gadget_is_dualspeed(gadget)) { + int hs = 0; if (gadget->speed == USB_SPEED_HIGH) hs = 1; if (type == USB_DT_OTHER_SPEED_CONFIG) @@ -277,13 +435,20 @@ static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) w_value &= 0xff; list_for_each_entry(c, &cdev->configs, list) { /* ignore configs that won't work at this speed */ - if (speed == USB_SPEED_HIGH) { + switch (speed) { + case USB_SPEED_SUPER: + if (!c->superspeed) + continue; + break; + case USB_SPEED_HIGH: if (!c->highspeed) continue; - } else { + break; + default: if (!c->fullspeed) continue; } + if (w_value == 0) return config_buf(c, speed, cdev->req->buf, type); w_value--; @@ -297,16 +462,22 @@ static int count_configs(struct usb_composite_dev *cdev, unsigned type) struct usb_configuration *c; unsigned count = 0; int hs = 0; + int ss = 0; if (gadget_is_dualspeed(gadget)) { if (gadget->speed == USB_SPEED_HIGH) hs = 1; + if (gadget->speed == USB_SPEED_SUPER) + ss = 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 (ss) { + if (!c->superspeed) + continue; + } else if (hs) { if (!c->highspeed) continue; } else { @@ -318,6 +489,71 @@ static int count_configs(struct usb_composite_dev *cdev, unsigned type) return count; } +/** + * bos_desc() - prepares the BOS descriptor. + * @cdev: pointer to usb_composite device to generate the bos + * descriptor for + * + * This function generates the BOS (Binary Device Object) + * descriptor and its device capabilities descriptors. The BOS + * descriptor should be supported by a SuperSpeed device. + */ +static int bos_desc(struct usb_composite_dev *cdev) +{ + struct usb_ext_cap_descriptor *usb_ext; + struct usb_ss_cap_descriptor *ss_cap; + struct usb_dcd_config_params dcd_config_params; + struct usb_bos_descriptor *bos = cdev->req->buf; + + bos->bLength = USB_DT_BOS_SIZE; + bos->bDescriptorType = USB_DT_BOS; + + bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE); + bos->bNumDeviceCaps = 0; + + /* + * A SuperSpeed device shall include the USB2.0 extension descriptor + * and shall support LPM when operating in USB2.0 HS mode. + */ + usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength); + bos->bNumDeviceCaps++; + le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE); + usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE; + usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY; + usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT; + usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT); + + /* + * The Superspeed USB Capability descriptor shall be implemented by all + * SuperSpeed devices. + */ + ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); + bos->bNumDeviceCaps++; + le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE); + ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; + ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; + ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; + ss_cap->bmAttributes = 0; /* LTM is not supported yet */ + ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION | + USB_FULL_SPEED_OPERATION | + USB_HIGH_SPEED_OPERATION | + USB_5GBPS_OPERATION); + ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; + + /* Get Controller configuration */ + if (cdev->gadget->ops->get_config_params) + cdev->gadget->ops->get_config_params(&dcd_config_params); + else { + dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT; + dcd_config_params.bU2DevExitLat = + cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT); + } + ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat; + ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat; + + return le16_to_cpu(bos->wTotalLength); +} + static void device_qual(struct usb_composite_dev *cdev) { struct usb_qualifier_descriptor *qual = cdev->req->buf; @@ -330,7 +566,7 @@ static void device_qual(struct usb_composite_dev *cdev) qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; /* ASSUME same EP0 fifo size at both speeds */ - qual->bMaxPacketSize0 = cdev->desc.bMaxPacketSize0; + qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket; qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); qual->bRESERVED = 0; } @@ -346,8 +582,11 @@ static void reset_config(struct usb_composite_dev *cdev) list_for_each_entry(f, &cdev->config->functions, list) { if (f->disable) f->disable(f); + + bitmap_zero(f->endpoints, 32); } cdev->config = NULL; + cdev->delayed_status = 0; } static int set_config(struct usb_composite_dev *cdev, @@ -359,29 +598,31 @@ static int set_config(struct usb_composite_dev *cdev, unsigned power = gadget_is_otg(gadget) ? 8 : 100; int tmp; - if (cdev->config) - reset_config(cdev); - if (number) { list_for_each_entry(c, &cdev->configs, list) { if (c->bConfigurationValue == number) { + /* + * We disable the FDs of the previous + * configuration only if the new configuration + * is a valid one + */ + if (cdev->config) + reset_config(cdev); result = 0; break; } } if (result < 0) goto done; - } else + } else { /* Zero configuration value - need to reset the config */ + if (cdev->config) + reset_config(cdev); result = 0; + } - INFO(cdev, "%s speed config #%d: %s\n", - ({ 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"); + INFO(cdev, "%s config #%d: %s\n", + usb_speed_string(gadget->speed), + number, c ? c->label : "unconfigured"); if (!c) goto done; @@ -391,10 +632,41 @@ static int set_config(struct usb_composite_dev *cdev, /* Initialize all interfaces by setting them to altsetting zero. */ for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { struct usb_function *f = c->interface[tmp]; + struct usb_descriptor_header **descriptors; 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. + */ + switch (gadget->speed) { + case USB_SPEED_SUPER: + descriptors = f->ss_descriptors; + break; + case USB_SPEED_HIGH: + descriptors = f->hs_descriptors; + break; + default: + descriptors = f->fs_descriptors; + } + + for (; *descriptors; ++descriptors) { + struct usb_endpoint_descriptor *ep; + int addr; + + 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) { DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n", @@ -403,65 +675,106 @@ static int set_config(struct usb_composite_dev *cdev, reset_config(cdev); goto done; } + + if (result == USB_GADGET_DELAYED_STATUS) { + DBG(cdev, + "%s: interface %d (%s) requested delayed status\n", + __func__, tmp, f->name); + cdev->delayed_status++; + DBG(cdev, "delayed_status count %d\n", + cdev->delayed_status); + } } /* when we return, be sure our power usage is valid */ - power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW; + power = c->MaxPower ? c->MaxPower : usb_gadget_vbus_draw_ma; done: usb_gadget_vbus_draw(gadget, power); + if (result >= 0 && cdev->delayed_status) + result = USB_GADGET_DELAYED_STATUS; return result; } +int usb_add_config_only(struct usb_composite_dev *cdev, + struct usb_configuration *config) +{ + struct usb_configuration *c; + + if (!config->bConfigurationValue) + return -EINVAL; + + /* Prevent duplicate configuration identifiers */ + list_for_each_entry(c, &cdev->configs, list) { + if (c->bConfigurationValue == config->bConfigurationValue) + return -EBUSY; + } + + config->cdev = cdev; + list_add_tail(&config->list, &cdev->configs); + + INIT_LIST_HEAD(&config->functions); + config->next_interface_id = 0; + memset(config->interface, 0, sizeof(config->interface)); + + return 0; +} +EXPORT_SYMBOL_GPL(usb_add_config_only); + /** * usb_add_config() - add a configuration to a device. * @cdev: wraps the USB gadget * @config: the configuration, with bConfigurationValue assigned + * @bind: the configuration's bind function * Context: single threaded during gadget setup * - * One of the main tasks of a composite driver's bind() routine is to + * One of the main tasks of a composite @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 + * 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 __init usb_add_config(struct usb_composite_dev *cdev, - struct usb_configuration *config) +int usb_add_config(struct usb_composite_dev *cdev, + struct usb_configuration *config, + int (*bind)(struct usb_configuration *)) { int status = -EINVAL; - struct usb_configuration *c; + + if (!bind) + goto done; DBG(cdev, "adding config #%u '%s'/%p\n", config->bConfigurationValue, config->label, config); - if (!config->bConfigurationValue || !config->bind) + status = usb_add_config_only(cdev, config); + if (status) 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); + status = bind(config); if (status < 0) { + while (!list_empty(&config->functions)) { + struct usb_function *f; + + f = list_first_entry(&config->functions, + struct usb_function, list); + list_del(&f->list); + if (f->unbind) { + DBG(cdev, "unbind function '%s'/%p\n", + f->name, f); + f->unbind(config, f); + /* may free memory for "f" */ + } + } list_del(&config->list); config->cdev = NULL; } else { unsigned i; - DBG(cdev, "cfg %d/%p speeds:%s%s\n", + DBG(cdev, "cfg %d/%p speeds:%s%s%s\n", config->bConfigurationValue, config, + config->superspeed ? " super" : "", config->highspeed ? " high" : "", config->fullspeed ? (gadget_is_dualspeed(cdev->gadget) @@ -479,7 +792,7 @@ int __init usb_add_config(struct usb_composite_dev *cdev, } } - /* set_alt(), or next config->bind(), sets up + /* set_alt(), or next bind(), sets up * ep->driver_data as needed. */ usb_ep_autoconfig_reset(cdev->gadget); @@ -490,6 +803,48 @@ done: config->bConfigurationValue, status); return status; } +EXPORT_SYMBOL_GPL(usb_add_config); + +static void remove_config(struct usb_composite_dev *cdev, + struct usb_configuration *config) +{ + while (!list_empty(&config->functions)) { + struct usb_function *f; + + f = list_first_entry(&config->functions, + struct usb_function, list); + list_del(&f->list); + if (f->unbind) { + DBG(cdev, "unbind function '%s'/%p\n", f->name, f); + f->unbind(config, f); + /* may free memory for "f" */ + } + } + list_del(&config->list); + if (config->unbind) { + DBG(cdev, "unbind config '%s'/%p\n", config->label, config); + config->unbind(config); + /* may free memory for "c" */ + } +} + +/** + * usb_remove_config() - remove a configuration from a device. + * @cdev: wraps the USB gadget + * @config: the configuration + * + * Drivers must call usb_gadget_disconnect before calling this function + * to disconnect the device from the host and make sure the host will not + * try to enumerate the device while we are changing the config list. + */ +void usb_remove_config(struct usb_composite_dev *cdev, + struct usb_configuration *config) +{ + if (cdev->config == config) + reset_config(cdev); + + remove_config(cdev, config); +} /*-------------------------------------------------------------------------*/ @@ -502,7 +857,7 @@ done: static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) { const struct usb_gadget_strings *s; - u16 language; + __le16 language; __le16 *tmp; while (*sp) { @@ -542,6 +897,8 @@ static int lookup_string( static int get_string(struct usb_composite_dev *cdev, void *buf, u16 language, int id) { + struct usb_composite_driver *composite = cdev->driver; + struct usb_gadget_string_container *uc; struct usb_configuration *c; struct usb_function *f; int len; @@ -574,8 +931,14 @@ static int get_string(struct usb_composite_dev *cdev, collect_langs(sp, s->wData); } } + list_for_each_entry(uc, &cdev->gstrings, list) { + struct usb_gadget_strings **sp; - for (len = 0; s->wData[len] && len <= 126; len++) + sp = get_containers_gs(uc); + collect_langs(sp, s->wData); + } + + for (len = 0; len <= 126 && s->wData[len]; len++) continue; if (!len) return -EINVAL; @@ -584,9 +947,18 @@ static int get_string(struct usb_composite_dev *cdev, 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. + list_for_each_entry(uc, &cdev->gstrings, list) { + struct usb_gadget_strings **sp; + + sp = get_containers_gs(uc); + len = lookup_string(sp, buf, language, id); + if (len > 0) + return len; + } + + /* 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); @@ -619,19 +991,197 @@ static int get_string(struct usb_composite_dev *cdev, * 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 routine, to - * ensure that for example different functions don't wrongly assign - * different meanings to the same identifier. + * 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 __init usb_string_id(struct usb_composite_dev *cdev) +int usb_string_id(struct usb_composite_dev *cdev) { if (cdev->next_string_id < 254) { - /* string id 0 is reserved */ + /* 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; } +EXPORT_SYMBOL_GPL(usb_string_id); + +/** + * 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) +{ + int next = cdev->next_string_id; + + for (; str->s; ++str) { + if (unlikely(next >= 254)) + return -ENODEV; + str->id = ++next; + } + + cdev->next_string_id = next; + + return 0; +} +EXPORT_SYMBOL_GPL(usb_string_ids_tab); + +static struct usb_gadget_string_container *copy_gadget_strings( + struct usb_gadget_strings **sp, unsigned n_gstrings, + unsigned n_strings) +{ + struct usb_gadget_string_container *uc; + struct usb_gadget_strings **gs_array; + struct usb_gadget_strings *gs; + struct usb_string *s; + unsigned mem; + unsigned n_gs; + unsigned n_s; + void *stash; + + mem = sizeof(*uc); + mem += sizeof(void *) * (n_gstrings + 1); + mem += sizeof(struct usb_gadget_strings) * n_gstrings; + mem += sizeof(struct usb_string) * (n_strings + 1) * (n_gstrings); + uc = kmalloc(mem, GFP_KERNEL); + if (!uc) + return ERR_PTR(-ENOMEM); + gs_array = get_containers_gs(uc); + stash = uc->stash; + stash += sizeof(void *) * (n_gstrings + 1); + for (n_gs = 0; n_gs < n_gstrings; n_gs++) { + struct usb_string *org_s; + + gs_array[n_gs] = stash; + gs = gs_array[n_gs]; + stash += sizeof(struct usb_gadget_strings); + gs->language = sp[n_gs]->language; + gs->strings = stash; + org_s = sp[n_gs]->strings; + + for (n_s = 0; n_s < n_strings; n_s++) { + s = stash; + stash += sizeof(struct usb_string); + if (org_s->s) + s->s = org_s->s; + else + s->s = ""; + org_s++; + } + s = stash; + s->s = NULL; + stash += sizeof(struct usb_string); + + } + gs_array[n_gs] = NULL; + return uc; +} + +/** + * usb_gstrings_attach() - attach gadget strings to a cdev and assign ids + * @cdev: the device whose string descriptor IDs are being allocated + * and attached. + * @sp: an array of usb_gadget_strings to attach. + * @n_strings: number of entries in each usb_strings array (sp[]->strings) + * + * This function will create a deep copy of usb_gadget_strings and usb_string + * and attach it to the cdev. The actual string (usb_string.s) will not be + * copied but only a referenced will be made. The struct usb_gadget_strings + * array may contain multiple languges and should be NULL terminated. + * The ->language pointer of each struct usb_gadget_strings has to contain the + * same amount of entries. + * For instance: sp[0] is en-US, sp[1] is es-ES. It is expected that the first + * usb_string entry of es-ES containts the translation of the first usb_string + * entry of en-US. Therefore both entries become the same id assign. + */ +struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev, + struct usb_gadget_strings **sp, unsigned n_strings) +{ + struct usb_gadget_string_container *uc; + struct usb_gadget_strings **n_gs; + unsigned n_gstrings = 0; + unsigned i; + int ret; + + for (i = 0; sp[i]; i++) + n_gstrings++; + + if (!n_gstrings) + return ERR_PTR(-EINVAL); + + uc = copy_gadget_strings(sp, n_gstrings, n_strings); + if (IS_ERR(uc)) + return ERR_CAST(uc); + + n_gs = get_containers_gs(uc); + ret = usb_string_ids_tab(cdev, n_gs[0]->strings); + if (ret) + goto err; + + for (i = 1; i < n_gstrings; i++) { + struct usb_string *m_s; + struct usb_string *s; + unsigned n; + + m_s = n_gs[0]->strings; + s = n_gs[i]->strings; + for (n = 0; n < n_strings; n++) { + s->id = m_s->id; + s++; + m_s++; + } + } + list_add_tail(&uc->list, &cdev->gstrings); + return n_gs[0]->strings; +err: + kfree(uc); + return ERR_PTR(ret); +} +EXPORT_SYMBOL_GPL(usb_gstrings_attach); + +/** + * 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) +{ + unsigned next = c->next_string_id; + if (unlikely(n > 254 || (unsigned)next + n > 254)) + return -ENODEV; + c->next_string_id += n; + return next + 1; +} +EXPORT_SYMBOL_GPL(usb_string_ids_n); /*-------------------------------------------------------------------------*/ @@ -650,17 +1200,19 @@ static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) * housekeeping for the gadget function we're implementing. Most of * the work is in config and function specific setup. */ -static int +int composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) { struct usb_composite_dev *cdev = get_gadget_data(gadget); struct usb_request *req = cdev->req; int value = -EOPNOTSUPP; + int status = 0; u16 w_index = le16_to_cpu(ctrl->wIndex); u8 intf = w_index & 0xFF; u16 w_value = le16_to_cpu(ctrl->wValue); u16 w_length = le16_to_cpu(ctrl->wLength); struct usb_function *f = NULL; + u8 endp; /* partial re-init of the response message; the function or the * gadget might need to intercept e.g. a control-OUT completion @@ -668,7 +1220,7 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) */ req->zero = 0; req->complete = composite_setup_complete; - req->length = USB_BUFSIZ; + req->length = 0; gadget->ep0->driver_data = cdev; switch (ctrl->bRequest) { @@ -682,18 +1234,31 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) case USB_DT_DEVICE: cdev->desc.bNumConfigurations = count_configs(cdev, USB_DT_DEVICE); + cdev->desc.bMaxPacketSize0 = + cdev->gadget->ep0->maxpacket; + if (gadget_is_superspeed(gadget)) { + if (gadget->speed >= USB_SPEED_SUPER) { + cdev->desc.bcdUSB = cpu_to_le16(0x0300); + cdev->desc.bMaxPacketSize0 = 9; + } else { + cdev->desc.bcdUSB = cpu_to_le16(0x0210); + } + } + 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)) + if (!gadget_is_dualspeed(gadget) || + gadget->speed >= USB_SPEED_SUPER) break; device_qual(cdev); value = min_t(int, w_length, sizeof(struct usb_qualifier_descriptor)); break; case USB_DT_OTHER_SPEED_CONFIG: - if (!gadget_is_dualspeed(gadget)) + if (!gadget_is_dualspeed(gadget) || + gadget->speed >= USB_SPEED_SUPER) break; /* FALLTHROUGH */ case USB_DT_CONFIG: @@ -707,8 +1272,11 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) if (value >= 0) value = min(w_length, (u16) value); break; - default: - goto unknown; + case USB_DT_BOS: + if (gadget_is_superspeed(gadget)) { + value = bos_desc(cdev); + value = min(w_length, (u16) value); + } break; } break; @@ -743,7 +1311,7 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) case USB_REQ_SET_INTERFACE: if (ctrl->bRequestType != USB_RECIP_INTERFACE) goto unknown; - if (!cdev->config || w_index >= MAX_CONFIG_INTERFACES) + if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) break; f = cdev->config->interface[intf]; if (!f) @@ -751,11 +1319,19 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) if (w_value && !f->set_alt) break; value = f->set_alt(f, w_index, w_value); + if (value == USB_GADGET_DELAYED_STATUS) { + DBG(cdev, + "%s: interface %d (%s) requested delayed status\n", + __func__, intf, f->name); + cdev->delayed_status++; + DBG(cdev, "delayed_status count %d\n", + cdev->delayed_status); + } 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) + if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) break; f = cdev->config->interface[intf]; if (!f) @@ -767,35 +1343,123 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) *((u8 *)req->buf) = value; value = min(w_length, (u16) 1); break; + + /* + * USB 3.0 additions: + * Function driver should handle get_status request. If such cb + * wasn't supplied we respond with default value = 0 + * Note: function driver should supply such cb only for the first + * interface of the function + */ + case USB_REQ_GET_STATUS: + if (!gadget_is_superspeed(gadget)) + goto unknown; + if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE)) + goto unknown; + value = 2; /* This is the length of the get_status reply */ + put_unaligned_le16(0, req->buf); + if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) + break; + f = cdev->config->interface[intf]; + if (!f) + break; + status = f->get_status ? f->get_status(f) : 0; + if (status < 0) + break; + put_unaligned_le16(status & 0x0000ffff, req->buf); + break; + /* + * Function drivers should handle SetFeature/ClearFeature + * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied + * only for the first interface of the function + */ + case USB_REQ_CLEAR_FEATURE: + case USB_REQ_SET_FEATURE: + if (!gadget_is_superspeed(gadget)) + goto unknown; + if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE)) + goto unknown; + switch (w_value) { + case USB_INTRF_FUNC_SUSPEND: + if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) + break; + f = cdev->config->interface[intf]; + if (!f) + break; + value = 0; + if (f->func_suspend) + value = f->func_suspend(f, w_index >> 8); + if (value < 0) { + ERROR(cdev, + "func_suspend() returned error %d\n", + value); + value = 0; + } + break; + } + break; default: unknown: - debug("non-core control req%02x.%02x v%04x i%04x l%d\n", + VDBG(cdev, + "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 ... punt other - * recipients (endpoint, other, WUSB, ...) to the current + /* functions always handle their interfaces and endpoints... + * punt other recipients (other, WUSB, ...) to the current * configuration code. + * + * REVISIT it could make sense to let the composite device + * take such requests too, if that's ever needed: to work + * in config 0, etc. */ - f = cdev->config->interface[intf]; + switch (ctrl->bRequestType & USB_RECIP_MASK) { + case USB_RECIP_INTERFACE: + if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) + break; + 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; + } + if (f && f->setup) value = f->setup(f, ctrl); - else - f = NULL; - - if (value < 0 && !f) { + else { struct usb_configuration *c; c = cdev->config; - if (c && c->setup) + if (!c) + goto done; + + /* try current config's setup */ + if (c->setup) { value = c->setup(c, ctrl); + goto done; + } + + /* try the only function in the current config */ + if (!list_is_singular(&c->functions)) + goto done; + f = list_first_entry(&c->functions, struct usb_function, + list); + if (f->setup) + value = f->setup(f, ctrl); } goto done; } /* respond with data transfer before status phase? */ - if (value >= 0) { + if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) { req->length = value; req->zero = value < w_length; value = usb_ep_queue(gadget->ep0, req); @@ -804,6 +1468,10 @@ unknown: req->status = 0; composite_setup_complete(gadget->ep0, req); } + } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) { + WARN(cdev, + "%s: Delayed status not supported for w_length != 0", + __func__); } done: @@ -811,7 +1479,7 @@ done: return value; } -static void composite_disconnect(struct usb_gadget *gadget) +void composite_disconnect(struct usb_gadget *gadget) { struct usb_composite_dev *cdev = get_gadget_data(gadget); @@ -820,12 +1488,13 @@ static void composite_disconnect(struct usb_gadget *gadget) */ if (cdev->config) reset_config(cdev); + if (cdev->driver->disconnect) + cdev->driver->disconnect(cdev); } /*-------------------------------------------------------------------------*/ -static void /* __init_or_exit */ -composite_unbind(struct usb_gadget *gadget) +static void __composite_unbind(struct usb_gadget *gadget, bool unbind_driver) { struct usb_composite_dev *cdev = get_gadget_data(gadget); @@ -834,97 +1503,142 @@ composite_unbind(struct usb_gadget *gadget) * so there's no i/o concurrency that could affect the * state protected by cdev->lock. */ -// WARN_ON(cdev->config); + WARN_ON(cdev->config); while (!list_empty(&cdev->configs)) { struct usb_configuration *c; - c = list_first_entry(&cdev->configs, struct usb_configuration, list); - while (!list_empty(&c->functions)) { - struct usb_function *f; - - f = list_first_entry(&c->functions, - struct usb_function, list); - list_del(&f->list); - if (f->unbind) { - DBG(cdev, "unbind function '%s'/%p\n", - f->name, f); - f->unbind(c, f); - /* may free memory for "f" */ - } - } - list_del(&c->list); - if (c->unbind) { - DBG(cdev, "unbind config '%s'/%p\n", c->label, c); - c->unbind(c); - /* may free memory for "c" */ - } + remove_config(cdev, c); } - if (composite->unbind) - composite->unbind(cdev); + if (cdev->driver->unbind && unbind_driver) + cdev->driver->unbind(cdev); - if (cdev->req) { - dma_free(cdev->req->buf); - usb_ep_free_request(gadget->ep0, cdev->req); - } + composite_dev_cleanup(cdev); + + kfree(cdev->def_manufacturer); kfree(cdev); set_gadget_data(gadget, NULL); - composite = NULL; } -static void __init -string_override_one(struct usb_gadget_strings *tab, u8 id, const char *s) +static void composite_unbind(struct usb_gadget *gadget) { - struct usb_string *str = tab->strings; - - for (str = tab->strings; str->s; str++) { - if (str->id == id) { - str->s = s; - return; - } - } + __composite_unbind(gadget, true); } -static void __init -string_override(struct usb_gadget_strings **tab, u8 id, const char *s) +static void update_unchanged_dev_desc(struct usb_device_descriptor *new, + const struct usb_device_descriptor *old) { - while (*tab) { - string_override_one(*tab, id, s); - tab++; - } + __le16 idVendor; + __le16 idProduct; + __le16 bcdDevice; + u8 iSerialNumber; + u8 iManufacturer; + u8 iProduct; + + /* + * these variables may have been set in + * usb_composite_overwrite_options() + */ + idVendor = new->idVendor; + idProduct = new->idProduct; + bcdDevice = new->bcdDevice; + iSerialNumber = new->iSerialNumber; + iManufacturer = new->iManufacturer; + iProduct = new->iProduct; + + *new = *old; + if (idVendor) + new->idVendor = idVendor; + if (idProduct) + new->idProduct = idProduct; + if (bcdDevice) + new->bcdDevice = bcdDevice; + else + new->bcdDevice = cpu_to_le16(get_default_bcdDevice()); + if (iSerialNumber) + new->iSerialNumber = iSerialNumber; + if (iManufacturer) + new->iManufacturer = iManufacturer; + if (iProduct) + new->iProduct = iProduct; } -static int __init composite_bind(struct usb_gadget *gadget) +int composite_dev_prepare(struct usb_composite_driver *composite, + struct usb_composite_dev *cdev) { - struct usb_composite_dev *cdev; - int status = -ENOMEM; - - cdev = xzalloc(sizeof *cdev); - cdev->gadget = gadget; - set_gadget_data(gadget, cdev); - INIT_LIST_HEAD(&cdev->configs); + struct usb_gadget *gadget = cdev->gadget; + int ret = -ENOMEM; /* preallocate control response and buffer */ cdev->req = usb_ep_alloc_request(gadget->ep0); if (!cdev->req) - goto fail; - cdev->req->buf = dma_alloc(USB_BUFSIZ); + return -ENOMEM; + + cdev->req->buf = dma_alloc(USB_COMP_EP0_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); + /* + * As per USB compliance update, a device that is actively drawing + * more than 100mA from USB must report itself as bus-powered in + * the GetStatus(DEVICE) call. + */ + if (usb_gadget_vbus_draw_ma <= USB_SELF_POWER_VBUS_MAX_DRAW) + usb_gadget_set_selfpowered(gadget); /* interface and string IDs start at zero via kzalloc. * we force endpoints to start unassigned; few controller * drivers will zero ep->driver_data. */ - usb_ep_autoconfig_reset(cdev->gadget); + usb_ep_autoconfig_reset(gadget); + return 0; + +fail: + usb_ep_free_request(gadget->ep0, cdev->req); + cdev->req = NULL; + return ret; +} + +void composite_dev_cleanup(struct usb_composite_dev *cdev) +{ + struct usb_gadget_string_container *uc, *tmp; + + list_for_each_entry_safe(uc, tmp, &cdev->gstrings, list) { + list_del(&uc->list); + kfree(uc); + } + if (cdev->req) { + kfree(cdev->req->buf); + usb_ep_free_request(cdev->gadget->ep0, cdev->req); + } + cdev->next_string_id = 0; +} + +static int composite_bind(struct usb_gadget *gadget, + struct usb_gadget_driver *gdriver) +{ + struct usb_composite_dev *cdev; + struct usb_composite_driver *composite = to_cdriver(gdriver); + int status = -ENOMEM; + + cdev = kzalloc(sizeof *cdev, GFP_KERNEL); + if (!cdev) + return status; + + cdev->gadget = gadget; + set_gadget_data(gadget, cdev); + INIT_LIST_HEAD(&cdev->configs); + INIT_LIST_HEAD(&cdev->gstrings); + + status = composite_dev_prepare(composite, cdev); + if (status) + goto fail; /* composite gadget needs to assign strings for whole device (like * serial number), register function drivers, potentially update @@ -934,42 +1648,23 @@ static int __init composite_bind(struct usb_gadget *gadget) if (status < 0) goto fail; - cdev->desc = *composite->dev; - cdev->desc.bMaxPacketSize0 = gadget->ep0->maxpacket; + update_unchanged_dev_desc(&cdev->desc, composite->dev); - /* standardized runtime overrides for device ID data */ - if (idVendor) - cdev->desc.idVendor = cpu_to_le16(idVendor); - if (idProduct) - cdev->desc.idProduct = cpu_to_le16(idProduct); - if (bcdDevice) - cdev->desc.bcdDevice = cpu_to_le16(bcdDevice); - - /* strings can't be assigned before bind() allocates the - * releavnt identifiers - */ - if (cdev->desc.iManufacturer && iManufacturer) - string_override(composite->strings, - cdev->desc.iManufacturer, iManufacturer); - if (cdev->desc.iProduct && iProduct) - string_override(composite->strings, - cdev->desc.iProduct, iProduct); - if (cdev->desc.iSerialNumber && iSerialNumber) - string_override(composite->strings, - cdev->desc.iSerialNumber, iSerialNumber); + /* has userspace failed to provide a serial number? */ + if (composite->needs_serial && !cdev->desc.iSerialNumber) + WARNING(cdev, "userspace failed to provide iSerialNumber\n"); + INFO(cdev, "%s ready\n", composite->name); return 0; fail: - composite_unbind(gadget); + __composite_unbind(gadget, false); return status; } /*-------------------------------------------------------------------------*/ -static struct usb_gadget_driver composite_driver = { - .speed = USB_SPEED_HIGH, - +static const struct usb_gadget_driver composite_driver_template = { .bind = composite_bind, .unbind = composite_unbind, @@ -978,8 +1673,9 @@ static struct usb_gadget_driver composite_driver = { }; /** - * usb_composite_register() - register a composite driver + * usb_composite_probe() - 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 @@ -992,25 +1688,26 @@ static struct usb_gadget_driver composite_driver = { * 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) +int usb_composite_probe(struct usb_composite_driver *driver) { - int ret; + struct usb_gadget_driver *gadget_driver; - if (!driver || !driver->dev || !driver->bind || composite) + if (!driver || !driver->dev || !driver->bind) return -EINVAL; if (!driver->name) driver->name = "composite"; - composite_driver.function = (char *) driver->name; - composite = driver; - ret = usb_gadget_register_driver(&composite_driver); + driver->gadget_driver = composite_driver_template; + gadget_driver = &driver->gadget_driver; - if (ret) - composite = NULL; + gadget_driver->function = (char *) driver->name; + gadget_driver->driver.name = driver->name; + gadget_driver->max_speed = driver->max_speed; - return ret; + return usb_gadget_probe_driver(gadget_driver); } +EXPORT_SYMBOL_GPL(usb_composite_probe); /** * usb_composite_unregister() - unregister a composite driver @@ -1021,7 +1718,84 @@ int usb_composite_register(struct usb_composite_driver *driver) */ void usb_composite_unregister(struct usb_composite_driver *driver) { - if (composite != driver) - return; - usb_gadget_unregister_driver(&composite_driver); + usb_gadget_unregister_driver(&driver->gadget_driver); +} +EXPORT_SYMBOL_GPL(usb_composite_unregister); + +/** + * usb_composite_setup_continue() - Continue with the control transfer + * @cdev: the composite device who's control transfer was kept waiting + * + * This function must be called by the USB function driver to continue + * with the control transfer's data/status stage in case it had requested to + * delay the data/status stages. A USB function's setup handler (e.g. set_alt()) + * can request the composite framework to delay the setup request's data/status + * stages by returning USB_GADGET_DELAYED_STATUS. + */ +void usb_composite_setup_continue(struct usb_composite_dev *cdev) +{ + int value; + struct usb_request *req = cdev->req; + + DBG(cdev, "%s\n", __func__); + + if (cdev->delayed_status == 0) { + WARN(cdev, "%s: Unexpected call\n", __func__); + + } else if (--cdev->delayed_status == 0) { + DBG(cdev, "%s: Completing delayed status\n", __func__); + req->length = 0; + value = usb_ep_queue(cdev->gadget->ep0, req); + if (value < 0) { + DBG(cdev, "ep_queue --> %d\n", value); + req->status = 0; + composite_setup_complete(cdev->gadget->ep0, req); + } + } +} +EXPORT_SYMBOL_GPL(usb_composite_setup_continue); + +static char *composite_default_mfr(struct usb_gadget *gadget) +{ + return asprintf("barebox %s", gadget->name); +} + +void usb_composite_overwrite_options(struct usb_composite_dev *cdev, + struct usb_composite_overwrite *covr) +{ + struct usb_device_descriptor *desc = &cdev->desc; + struct usb_gadget_strings *gstr = cdev->driver->strings[0]; + struct usb_string *dev_str = gstr->strings; + + if (covr->idVendor) + desc->idVendor = cpu_to_le16(covr->idVendor); + + if (covr->idProduct) + desc->idProduct = cpu_to_le16(covr->idProduct); + + if (covr->bcdDevice) + desc->bcdDevice = cpu_to_le16(covr->bcdDevice); + + if (covr->serial_number) { + desc->iSerialNumber = dev_str[USB_GADGET_SERIAL_IDX].id; + dev_str[USB_GADGET_SERIAL_IDX].s = covr->serial_number; + } + if (covr->manufacturer) { + desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; + dev_str[USB_GADGET_MANUFACTURER_IDX].s = covr->manufacturer; + + } else if (!strlen(dev_str[USB_GADGET_MANUFACTURER_IDX].s)) { + desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; + cdev->def_manufacturer = composite_default_mfr(cdev->gadget); + dev_str[USB_GADGET_MANUFACTURER_IDX].s = cdev->def_manufacturer; + } + + if (covr->product) { + desc->iProduct = dev_str[USB_GADGET_PRODUCT_IDX].id; + dev_str[USB_GADGET_PRODUCT_IDX].s = covr->product; + } } +EXPORT_SYMBOL_GPL(usb_composite_overwrite_options); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David Brownell"); |