* with the relevant device-wide data.
*/
+static struct usb_gadget_strings **get_containers_gs(
+ struct usb_gadget_string_container *uc)
+{
+ return (struct usb_gadget_strings **)uc->stash;
+}
+
/**
* next_ep_desc() - advance to the next EP descriptor
* @t: currect pointer within descriptor array
}
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
* @function: the function that isn't yet ready to respond
}
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 = CONFIG_USB_GADGET_VBUS_DRAW;
+ 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)
{
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) {
}
/* 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 : CONFIG_USB_GADGET_VBUS_DRAW;
done:
usb_gadget_vbus_draw(gadget, power);
if (result >= 0 && cdev->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
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 || !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;
- memset(config->interface, 0, sizeof(config->interface));
-
status = bind(config);
if (status < 0) {
while (!list_empty(&config->functions)) {
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;
collect_langs(sp, s->wData);
}
}
+ list_for_each_entry(uc, &cdev->gstrings, list) {
+ struct usb_gadget_strings **sp;
+
+ sp = get_containers_gs(uc);
+ collect_langs(sp, s->wData);
+ }
for (len = 0; len <= 126 && s->wData[len]; len++)
continue;
return s->bLength;
}
+ 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.
}
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_PTR(PTR_ERR(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
* 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);
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);
unsigned long flags;
static DEVICE_ATTR(suspended, 0444, composite_show_suspended, NULL);
-static void
-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);
struct usb_configuration, list);
remove_config(cdev, c);
}
- if (cdev->driver->unbind)
+ if (cdev->driver->unbind && unbind_driver)
cdev->driver->unbind(cdev);
- if (cdev->req) {
- kfree(cdev->req->buf);
- usb_ep_free_request(gadget->ep0, cdev->req);
- }
- device_remove_file(&gadget->dev, &dev_attr_suspended);
+ composite_dev_cleanup(cdev);
+
kfree(cdev->def_manufacturer);
kfree(cdev);
set_gadget_data(gadget, NULL);
}
+static void composite_unbind(struct usb_gadget *gadget)
+{
+ __composite_unbind(gadget, true);
+}
+
static void update_unchanged_dev_desc(struct usb_device_descriptor *new,
const struct usb_device_descriptor *old)
{
new->iProduct = iProduct;
}
-static struct usb_composite_driver *to_cdriver(struct usb_gadget_driver *gdrv)
-{
- return container_of(gdrv, struct usb_composite_driver, gadget_driver);
-}
-
-static int composite_bind(struct usb_gadget *gadget,
- struct usb_gadget_driver *gdriver)
+int composite_dev_prepare(struct usb_composite_driver *composite,
+ struct usb_composite_dev *cdev)
{
- 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;
-
- spin_lock_init(&cdev->lock);
- 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, GFP_KERNEL);
if (!cdev->req)
- goto fail;
+ return -ENOMEM;
+
cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL);
if (!cdev->req->buf)
goto fail;
+
+ ret = device_create_file(&gadget->dev, &dev_attr_suspended);
+ if (ret)
+ goto fail_dev;
+
cdev->req->complete = composite_setup_complete;
gadget->ep0->driver_data = cdev;
* 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_dev:
+ kfree(cdev->req->buf);
+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);
+ }
+ device_remove_file(&cdev->gadget->dev, &dev_attr_suspended);
+}
+
+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;
+
+ spin_lock_init(&cdev->lock);
+ 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
if (composite->needs_serial && !cdev->desc.iSerialNumber)
WARNING(cdev, "userspace failed to provide iSerialNumber\n");
- /* finish up */
- status = device_create_file(&gadget->dev, &dev_attr_suspended);
- if (status)
- goto fail;
-
INFO(cdev, "%s ready\n", composite->name);
return 0;
fail:
- composite_unbind(gadget);
+ __composite_unbind(gadget, false);
return status;
}
f->resume(f);
}
- maxpower = cdev->config->bMaxPower;
+ maxpower = cdev->config->MaxPower;
usb_gadget_vbus_draw(gadget, maxpower ?
- (2 * maxpower) : CONFIG_USB_GADGET_VBUS_DRAW);
+ maxpower : CONFIG_USB_GADGET_VBUS_DRAW);
}
cdev->suspended = 0;
projects / deliverable / linux.git / blobdiff