diff options
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 857 |
1 files changed, 522 insertions, 335 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index a37ccbd1e00..1236c6011c7 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -13,53 +13,75 @@ #include <linux/kernel.h> #include <linux/string.h> #include <linux/usb.h> +#include <linux/usb/quirks.h> #include "usb.h" /* Active configuration fields */ -#define usb_actconfig_show(field, multiplier, format_string) \ -static ssize_t show_##field(struct device *dev, \ - struct device_attribute *attr, char *buf) \ +#define usb_actconfig_show(field, format_string) \ +static ssize_t field##_show(struct device *dev, \ + struct device_attribute *attr, char *buf) \ { \ struct usb_device *udev; \ struct usb_host_config *actconfig; \ + ssize_t rc = 0; \ \ udev = to_usb_device(dev); \ + usb_lock_device(udev); \ actconfig = udev->actconfig; \ if (actconfig) \ - return sprintf(buf, format_string, \ - actconfig->desc.field * multiplier); \ - else \ - return 0; \ + rc = sprintf(buf, format_string, \ + actconfig->desc.field); \ + usb_unlock_device(udev); \ + return rc; \ } \ -#define usb_actconfig_attr(field, multiplier, format_string) \ -usb_actconfig_show(field, multiplier, format_string) \ -static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); +#define usb_actconfig_attr(field, format_string) \ + usb_actconfig_show(field, format_string) \ + static DEVICE_ATTR_RO(field) -usb_actconfig_attr(bNumInterfaces, 1, "%2d\n") -usb_actconfig_attr(bmAttributes, 1, "%2x\n") -usb_actconfig_attr(bMaxPower, 2, "%3dmA\n") +usb_actconfig_attr(bNumInterfaces, "%2d\n"); +usb_actconfig_attr(bmAttributes, "%2x\n"); -static ssize_t show_configuration_string(struct device *dev, +static ssize_t bMaxPower_show(struct device *dev, struct device_attribute *attr, char *buf) { struct usb_device *udev; struct usb_host_config *actconfig; + ssize_t rc = 0; udev = to_usb_device(dev); + usb_lock_device(udev); actconfig = udev->actconfig; - if ((!actconfig) || (!actconfig->string)) - return 0; - return sprintf(buf, "%s\n", actconfig->string); + if (actconfig) + rc = sprintf(buf, "%dmA\n", usb_get_max_power(udev, actconfig)); + usb_unlock_device(udev); + return rc; } -static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL); +static DEVICE_ATTR_RO(bMaxPower); + +static ssize_t configuration_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_device *udev; + struct usb_host_config *actconfig; + ssize_t rc = 0; + + udev = to_usb_device(dev); + usb_lock_device(udev); + actconfig = udev->actconfig; + if (actconfig && actconfig->string) + rc = sprintf(buf, "%s\n", actconfig->string); + usb_unlock_device(udev); + return rc; +} +static DEVICE_ATTR_RO(configuration); /* configuration value is always present, and r/w */ -usb_actconfig_show(bConfigurationValue, 1, "%u\n"); +usb_actconfig_show(bConfigurationValue, "%u\n"); -static ssize_t -set_bConfigurationValue(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t bConfigurationValue_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) { struct usb_device *udev = to_usb_device(dev); int config, value; @@ -71,28 +93,31 @@ set_bConfigurationValue(struct device *dev, struct device_attribute *attr, usb_unlock_device(udev); return (value < 0) ? value : count; } - -static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR, - show_bConfigurationValue, set_bConfigurationValue); +static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR, + bConfigurationValue_show, bConfigurationValue_store); /* String fields */ #define usb_string_attr(name) \ -static ssize_t show_##name(struct device *dev, \ +static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct usb_device *udev; \ + int retval; \ \ udev = to_usb_device(dev); \ - return sprintf(buf, "%s\n", udev->name); \ + usb_lock_device(udev); \ + retval = sprintf(buf, "%s\n", udev->name); \ + usb_unlock_device(udev); \ + return retval; \ } \ -static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); +static DEVICE_ATTR_RO(name) usb_string_attr(product); usb_string_attr(manufacturer); usb_string_attr(serial); -static ssize_t -show_speed(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t speed_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev; char *speed; @@ -110,35 +135,51 @@ show_speed(struct device *dev, struct device_attribute *attr, char *buf) case USB_SPEED_HIGH: speed = "480"; break; + case USB_SPEED_WIRELESS: + speed = "480"; + break; + case USB_SPEED_SUPER: + speed = "5000"; + break; default: speed = "unknown"; } return sprintf(buf, "%s\n", speed); } -static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL); +static DEVICE_ATTR_RO(speed); -static ssize_t -show_busnum(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t busnum_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev; udev = to_usb_device(dev); return sprintf(buf, "%d\n", udev->bus->busnum); } -static DEVICE_ATTR(busnum, S_IRUGO, show_busnum, NULL); +static DEVICE_ATTR_RO(busnum); -static ssize_t -show_devnum(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t devnum_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev; udev = to_usb_device(dev); return sprintf(buf, "%d\n", udev->devnum); } -static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL); +static DEVICE_ATTR_RO(devnum); -static ssize_t -show_version(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t devpath_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_device *udev; + + udev = to_usb_device(dev); + return sprintf(buf, "%s\n", udev->devpath); +} +static DEVICE_ATTR_RO(devpath); + +static ssize_t version_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev; u16 bcdUSB; @@ -147,56 +188,110 @@ show_version(struct device *dev, struct device_attribute *attr, char *buf) bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff); } -static DEVICE_ATTR(version, S_IRUGO, show_version, NULL); +static DEVICE_ATTR_RO(version); -static ssize_t -show_maxchild(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t maxchild_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev; udev = to_usb_device(dev); return sprintf(buf, "%d\n", udev->maxchild); } -static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL); +static DEVICE_ATTR_RO(maxchild); -static ssize_t -show_quirks(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t quirks_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev; udev = to_usb_device(dev); return sprintf(buf, "0x%x\n", udev->quirks); } -static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL); +static DEVICE_ATTR_RO(quirks); -static ssize_t -show_urbnum(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t avoid_reset_quirk_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_device *udev; + + udev = to_usb_device(dev); + return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET)); +} + +static ssize_t avoid_reset_quirk_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *udev = to_usb_device(dev); + int val; + + if (sscanf(buf, "%d", &val) != 1 || val < 0 || val > 1) + return -EINVAL; + usb_lock_device(udev); + if (val) + udev->quirks |= USB_QUIRK_RESET; + else + udev->quirks &= ~USB_QUIRK_RESET; + usb_unlock_device(udev); + return count; +} +static DEVICE_ATTR_RW(avoid_reset_quirk); + +static ssize_t urbnum_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev; udev = to_usb_device(dev); return sprintf(buf, "%d\n", atomic_read(&udev->urbnum)); } -static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL); +static DEVICE_ATTR_RO(urbnum); +static ssize_t removable_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_device *udev; + char *state; -#if defined(CONFIG_USB_PERSIST) || defined(CONFIG_USB_SUSPEND) -static const char power_group[] = "power"; -#endif + udev = to_usb_device(dev); -#ifdef CONFIG_USB_PERSIST + switch (udev->removable) { + case USB_DEVICE_REMOVABLE: + state = "removable"; + break; + case USB_DEVICE_FIXED: + state = "fixed"; + break; + default: + state = "unknown"; + } -static ssize_t -show_persist(struct device *dev, struct device_attribute *attr, char *buf) + return sprintf(buf, "%s\n", state); +} +static DEVICE_ATTR_RO(removable); + +static ssize_t ltm_capable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + if (usb_device_supports_ltm(to_usb_device(dev))) + return sprintf(buf, "%s\n", "yes"); + return sprintf(buf, "%s\n", "no"); +} +static DEVICE_ATTR_RO(ltm_capable); + +#ifdef CONFIG_PM + +static ssize_t persist_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev = to_usb_device(dev); return sprintf(buf, "%d\n", udev->persist_enabled); } -static ssize_t -set_persist(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t persist_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct usb_device *udev = to_usb_device(dev); int value; @@ -207,13 +302,13 @@ set_persist(struct device *dev, struct device_attribute *attr, if (sscanf(buf, "%d", &value) != 1) return -EINVAL; - usb_pm_lock(udev); + + usb_lock_device(udev); udev->persist_enabled = !!value; - usb_pm_unlock(udev); + usb_unlock_device(udev); return count; } - -static DEVICE_ATTR(persist, S_IRUGO | S_IWUSR, show_persist, set_persist); +static DEVICE_ATTR_RW(persist); static int add_persist_attributes(struct device *dev) { @@ -222,12 +317,13 @@ static int add_persist_attributes(struct device *dev) if (is_usb_device(dev)) { struct usb_device *udev = to_usb_device(dev); - /* Hubs are automatically enabled for USB_PERSIST */ - if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) - udev->persist_enabled = 1; - rc = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_persist.attr, - power_group); + /* Hubs are automatically enabled for USB_PERSIST, + * no point in creating the attribute file. + */ + if (udev->descriptor.bDeviceClass != USB_CLASS_HUB) + rc = sysfs_add_file_to_group(&dev->kobj, + &dev_attr_persist.attr, + power_group_name); } return rc; } @@ -236,29 +332,26 @@ static void remove_persist_attributes(struct device *dev) { sysfs_remove_file_from_group(&dev->kobj, &dev_attr_persist.attr, - power_group); + power_group_name); } - #else #define add_persist_attributes(dev) 0 #define remove_persist_attributes(dev) do {} while (0) -#endif /* CONFIG_USB_PERSIST */ +#endif /* CONFIG_PM */ -#ifdef CONFIG_USB_SUSPEND +#ifdef CONFIG_PM_RUNTIME -static ssize_t -show_connected_duration(struct device *dev, struct device_attribute *attr, - char *buf) +static ssize_t connected_duration_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct usb_device *udev = to_usb_device(dev); return sprintf(buf, "%u\n", jiffies_to_msecs(jiffies - udev->connect_time)); } - -static DEVICE_ATTR(connected_duration, S_IRUGO, show_connected_duration, NULL); +static DEVICE_ATTR_RO(connected_duration); /* * If the device is resumed, the last time the device was suspended has @@ -267,9 +360,8 @@ static DEVICE_ATTR(connected_duration, S_IRUGO, show_connected_duration, NULL); * * If the device is suspended, the active_duration is up-to-date. */ -static ssize_t -show_active_duration(struct device *dev, struct device_attribute *attr, - char *buf) +static ssize_t active_duration_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct usb_device *udev = to_usb_device(dev); int duration; @@ -280,152 +372,215 @@ show_active_duration(struct device *dev, struct device_attribute *attr, duration = jiffies_to_msecs(udev->active_duration); return sprintf(buf, "%u\n", duration); } +static DEVICE_ATTR_RO(active_duration); -static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL); - -static ssize_t -show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t autosuspend_show(struct device *dev, + struct device_attribute *attr, char *buf) { - struct usb_device *udev = to_usb_device(dev); - - return sprintf(buf, "%d\n", udev->autosuspend_delay / HZ); + return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000); } -static ssize_t -set_autosuspend(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t autosuspend_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) { - struct usb_device *udev = to_usb_device(dev); int value; - if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/HZ || - value <= - INT_MAX/HZ) + if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 || + value <= -INT_MAX/1000) return -EINVAL; - value *= HZ; - - udev->autosuspend_delay = value; - if (value >= 0) - usb_try_autosuspend_device(udev); - else { - if (usb_autoresume_device(udev) == 0) - usb_autosuspend_device(udev); - } + + pm_runtime_set_autosuspend_delay(dev, value * 1000); return count; } - -static DEVICE_ATTR(autosuspend, S_IRUGO | S_IWUSR, - show_autosuspend, set_autosuspend); +static DEVICE_ATTR_RW(autosuspend); static const char on_string[] = "on"; static const char auto_string[] = "auto"; -static const char suspend_string[] = "suspend"; -static ssize_t -show_level(struct device *dev, struct device_attribute *attr, char *buf) +static void warn_level(void) +{ + static int level_warned; + + if (!level_warned) { + level_warned = 1; + printk(KERN_WARNING "WARNING! power/level is deprecated; " + "use power/control instead\n"); + } +} + +static ssize_t level_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_device *udev = to_usb_device(dev); const char *p = auto_string; - if (udev->state == USB_STATE_SUSPENDED) { - if (udev->autoresume_disabled) - p = suspend_string; - } else { - if (udev->autosuspend_disabled) - p = on_string; - } + warn_level(); + if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto) + p = on_string; return sprintf(buf, "%s\n", p); } -static ssize_t -set_level(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t level_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct usb_device *udev = to_usb_device(dev); int len = count; char *cp; - int rc = 0; - int old_autosuspend_disabled, old_autoresume_disabled; + int rc = count; + warn_level(); cp = memchr(buf, '\n', count); if (cp) len = cp - buf; usb_lock_device(udev); - old_autosuspend_disabled = udev->autosuspend_disabled; - old_autoresume_disabled = udev->autoresume_disabled; - /* Setting the flags without calling usb_pm_lock is a subject to - * races, but who cares... - */ if (len == sizeof on_string - 1 && - strncmp(buf, on_string, len) == 0) { - udev->autosuspend_disabled = 1; - udev->autoresume_disabled = 0; - rc = usb_external_resume_device(udev); - - } else if (len == sizeof auto_string - 1 && - strncmp(buf, auto_string, len) == 0) { - udev->autosuspend_disabled = 0; - udev->autoresume_disabled = 0; - rc = usb_external_resume_device(udev); - - } else if (len == sizeof suspend_string - 1 && - strncmp(buf, suspend_string, len) == 0) { - udev->autosuspend_disabled = 0; - udev->autoresume_disabled = 1; - rc = usb_external_suspend_device(udev, PMSG_SUSPEND); - - } else + strncmp(buf, on_string, len) == 0) + usb_disable_autosuspend(udev); + + else if (len == sizeof auto_string - 1 && + strncmp(buf, auto_string, len) == 0) + usb_enable_autosuspend(udev); + + else rc = -EINVAL; - if (rc) { - udev->autosuspend_disabled = old_autosuspend_disabled; - udev->autoresume_disabled = old_autoresume_disabled; + usb_unlock_device(udev); + return rc; +} +static DEVICE_ATTR_RW(level); + +static ssize_t usb2_hardware_lpm_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_device *udev = to_usb_device(dev); + const char *p; + + if (udev->usb2_hw_lpm_allowed == 1) + p = "enabled"; + else + p = "disabled"; + + return sprintf(buf, "%s\n", p); +} + +static ssize_t usb2_hardware_lpm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *udev = to_usb_device(dev); + bool value; + int ret; + + usb_lock_device(udev); + + ret = strtobool(buf, &value); + + if (!ret) { + udev->usb2_hw_lpm_allowed = value; + ret = usb_set_usb2_hardware_lpm(udev, value); } + usb_unlock_device(udev); - return (rc < 0 ? rc : count); + + if (!ret) + return count; + + return ret; } +static DEVICE_ATTR_RW(usb2_hardware_lpm); -static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level); +static ssize_t usb2_lpm_l1_timeout_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct usb_device *udev = to_usb_device(dev); + return sprintf(buf, "%d\n", udev->l1_params.timeout); +} + +static ssize_t usb2_lpm_l1_timeout_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *udev = to_usb_device(dev); + u16 timeout; + + if (kstrtou16(buf, 0, &timeout)) + return -EINVAL; + + udev->l1_params.timeout = timeout; + + return count; +} +static DEVICE_ATTR_RW(usb2_lpm_l1_timeout); + +static ssize_t usb2_lpm_besl_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_device *udev = to_usb_device(dev); + return sprintf(buf, "%d\n", udev->l1_params.besl); +} + +static ssize_t usb2_lpm_besl_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *udev = to_usb_device(dev); + u8 besl; + + if (kstrtou8(buf, 0, &besl) || besl > 15) + return -EINVAL; + + udev->l1_params.besl = besl; + + return count; +} +static DEVICE_ATTR_RW(usb2_lpm_besl); + +static struct attribute *usb2_hardware_lpm_attr[] = { + &dev_attr_usb2_hardware_lpm.attr, + &dev_attr_usb2_lpm_l1_timeout.attr, + &dev_attr_usb2_lpm_besl.attr, + NULL, +}; +static struct attribute_group usb2_hardware_lpm_attr_group = { + .name = power_group_name, + .attrs = usb2_hardware_lpm_attr, +}; + +static struct attribute *power_attrs[] = { + &dev_attr_autosuspend.attr, + &dev_attr_level.attr, + &dev_attr_connected_duration.attr, + &dev_attr_active_duration.attr, + NULL, +}; +static struct attribute_group power_attr_group = { + .name = power_group_name, + .attrs = power_attrs, +}; static int add_power_attributes(struct device *dev) { int rc = 0; if (is_usb_device(dev)) { - rc = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_autosuspend.attr, - power_group); - if (rc == 0) - rc = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_level.attr, - power_group); - if (rc == 0) - rc = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_connected_duration.attr, - power_group); - if (rc == 0) - rc = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_active_duration.attr, - power_group); + struct usb_device *udev = to_usb_device(dev); + rc = sysfs_merge_group(&dev->kobj, &power_attr_group); + if (udev->usb2_hw_lpm_capable == 1) + rc = sysfs_merge_group(&dev->kobj, + &usb2_hardware_lpm_attr_group); } + return rc; } static void remove_power_attributes(struct device *dev) { - sysfs_remove_file_from_group(&dev->kobj, - &dev_attr_active_duration.attr, - power_group); - sysfs_remove_file_from_group(&dev->kobj, - &dev_attr_connected_duration.attr, - power_group); - sysfs_remove_file_from_group(&dev->kobj, - &dev_attr_level.attr, - power_group); - sysfs_remove_file_from_group(&dev->kobj, - &dev_attr_autosuspend.attr, - power_group); + sysfs_unmerge_group(&dev->kobj, &usb2_hardware_lpm_attr_group); + sysfs_unmerge_group(&dev->kobj, &power_attr_group); } #else @@ -433,13 +588,13 @@ static void remove_power_attributes(struct device *dev) #define add_power_attributes(dev) 0 #define remove_power_attributes(dev) do {} while (0) -#endif /* CONFIG_USB_SUSPEND */ +#endif /* CONFIG_PM_RUNTIME */ /* Descriptor fields */ #define usb_descriptor_attr_le16(field, format_string) \ static ssize_t \ -show_##field(struct device *dev, struct device_attribute *attr, \ +field##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct usb_device *udev; \ @@ -448,15 +603,15 @@ show_##field(struct device *dev, struct device_attribute *attr, \ return sprintf(buf, format_string, \ le16_to_cpu(udev->descriptor.field)); \ } \ -static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); +static DEVICE_ATTR_RO(field) -usb_descriptor_attr_le16(idVendor, "%04x\n") -usb_descriptor_attr_le16(idProduct, "%04x\n") -usb_descriptor_attr_le16(bcdDevice, "%04x\n") +usb_descriptor_attr_le16(idVendor, "%04x\n"); +usb_descriptor_attr_le16(idProduct, "%04x\n"); +usb_descriptor_attr_le16(bcdDevice, "%04x\n"); #define usb_descriptor_attr(field, format_string) \ static ssize_t \ -show_##field(struct device *dev, struct device_attribute *attr, \ +field##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct usb_device *udev; \ @@ -464,34 +619,31 @@ show_##field(struct device *dev, struct device_attribute *attr, \ udev = to_usb_device(dev); \ return sprintf(buf, format_string, udev->descriptor.field); \ } \ -static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); - -usb_descriptor_attr(bDeviceClass, "%02x\n") -usb_descriptor_attr(bDeviceSubClass, "%02x\n") -usb_descriptor_attr(bDeviceProtocol, "%02x\n") -usb_descriptor_attr(bNumConfigurations, "%d\n") -usb_descriptor_attr(bMaxPacketSize0, "%d\n") +static DEVICE_ATTR_RO(field) +usb_descriptor_attr(bDeviceClass, "%02x\n"); +usb_descriptor_attr(bDeviceSubClass, "%02x\n"); +usb_descriptor_attr(bDeviceProtocol, "%02x\n"); +usb_descriptor_attr(bNumConfigurations, "%d\n"); +usb_descriptor_attr(bMaxPacketSize0, "%d\n"); /* show if the device is authorized (1) or not (0) */ -static ssize_t usb_dev_authorized_show(struct device *dev, - struct device_attribute *attr, - char *buf) +static ssize_t authorized_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct usb_device *usb_dev = to_usb_device(dev); return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized); } - /* * Authorize a device to be used in the system * * Writing a 0 deauthorizes the device, writing a 1 authorizes it. */ -static ssize_t usb_dev_authorized_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t size) +static ssize_t authorized_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t size) { ssize_t result; struct usb_device *usb_dev = to_usb_device(dev); @@ -503,11 +655,31 @@ static ssize_t usb_dev_authorized_store(struct device *dev, result = usb_deauthorize_device(usb_dev); else result = usb_authorize_device(usb_dev); - return result < 0? result : size; + return result < 0 ? result : size; } +static DEVICE_ATTR_IGNORE_LOCKDEP(authorized, S_IRUGO | S_IWUSR, + authorized_show, authorized_store); -static DEVICE_ATTR(authorized, 0644, - usb_dev_authorized_show, usb_dev_authorized_store); +/* "Safely remove a device" */ +static ssize_t remove_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *udev = to_usb_device(dev); + int rc = 0; + + usb_lock_device(udev); + if (udev->state != USB_STATE_NOTATTACHED) { + + /* To avoid races, first unconfigure and then remove */ + usb_set_configuration(udev, -1); + rc = usb_remove_device(udev); + } + if (rc == 0) + rc = count; + usb_unlock_device(udev); + return rc; +} +static DEVICE_ATTR_IGNORE_LOCKDEP(remove, S_IWUSR, NULL, remove_store); static struct attribute *dev_attrs[] = { @@ -517,8 +689,8 @@ static struct attribute *dev_attrs[] = { &dev_attr_bConfigurationValue.attr, &dev_attr_bmAttributes.attr, &dev_attr_bMaxPower.attr, - &dev_attr_urbnum.attr, /* device attributes */ + &dev_attr_urbnum.attr, &dev_attr_idVendor.attr, &dev_attr_idProduct.attr, &dev_attr_bcdDevice.attr, @@ -530,52 +702,98 @@ static struct attribute *dev_attrs[] = { &dev_attr_speed.attr, &dev_attr_busnum.attr, &dev_attr_devnum.attr, + &dev_attr_devpath.attr, &dev_attr_version.attr, &dev_attr_maxchild.attr, &dev_attr_quirks.attr, + &dev_attr_avoid_reset_quirk.attr, &dev_attr_authorized.attr, + &dev_attr_remove.attr, + &dev_attr_removable.attr, + &dev_attr_ltm_capable.attr, NULL, }; static struct attribute_group dev_attr_grp = { .attrs = dev_attrs, }; +/* When modifying this list, be sure to modify dev_string_attrs_are_visible() + * accordingly. + */ +static struct attribute *dev_string_attrs[] = { + &dev_attr_manufacturer.attr, + &dev_attr_product.attr, + &dev_attr_serial.attr, + NULL +}; + +static umode_t dev_string_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct usb_device *udev = to_usb_device(dev); + + if (a == &dev_attr_manufacturer.attr) { + if (udev->manufacturer == NULL) + return 0; + } else if (a == &dev_attr_product.attr) { + if (udev->product == NULL) + return 0; + } else if (a == &dev_attr_serial.attr) { + if (udev->serial == NULL) + return 0; + } + return a->mode; +} + +static struct attribute_group dev_string_attr_grp = { + .attrs = dev_string_attrs, + .is_visible = dev_string_attrs_are_visible, +}; + +const struct attribute_group *usb_device_groups[] = { + &dev_attr_grp, + &dev_string_attr_grp, + NULL +}; + /* Binary descriptors */ static ssize_t -read_descriptors(struct kobject *kobj, struct bin_attribute *attr, +read_descriptors(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, loff_t off, size_t count) { - struct usb_device *udev = to_usb_device( - container_of(kobj, struct device, kobj)); + struct device *dev = container_of(kobj, struct device, kobj); + struct usb_device *udev = to_usb_device(dev); size_t nleft = count; size_t srclen, n; + int cfgno; + void *src; - usb_lock_device(udev); - - /* The binary attribute begins with the device descriptor */ - srclen = sizeof(struct usb_device_descriptor); - if (off < srclen) { - n = min_t(size_t, nleft, srclen - off); - memcpy(buf, off + (char *) &udev->descriptor, n); - nleft -= n; - buf += n; - off = 0; - } else { - off -= srclen; - } - - /* Then follows the raw descriptor entry for the current - * configuration (config plus subsidiary descriptors). + /* The binary attribute begins with the device descriptor. + * Following that are the raw descriptor entries for all the + * configurations (config plus subsidiary descriptors). */ - if (udev->actconfig) { - int cfgno = udev->actconfig - udev->config; - - srclen = __le16_to_cpu(udev->actconfig->desc.wTotalLength); + usb_lock_device(udev); + for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations && + nleft > 0; ++cfgno) { + if (cfgno < 0) { + src = &udev->descriptor; + srclen = sizeof(struct usb_device_descriptor); + } else { + src = udev->rawdescriptors[cfgno]; + srclen = __le16_to_cpu(udev->config[cfgno].desc. + wTotalLength); + } if (off < srclen) { - n = min_t(size_t, nleft, srclen - off); - memcpy(buf, off + udev->rawdescriptors[cfgno], n); + n = min(nleft, srclen - (size_t) off); + memcpy(buf, src + off, n); nleft -= n; + buf += n; + off = 0; + } else { + off -= srclen; } } usb_unlock_device(udev); @@ -593,10 +811,6 @@ int usb_create_sysfs_dev_files(struct usb_device *udev) struct device *dev = &udev->dev; int retval; - retval = sysfs_create_group(&dev->kobj, &dev_attr_grp); - if (retval) - return retval; - retval = device_create_bin_file(dev, &dev_bin_attr_descriptors); if (retval) goto error; @@ -608,26 +822,7 @@ int usb_create_sysfs_dev_files(struct usb_device *udev) retval = add_power_attributes(dev); if (retval) goto error; - - if (udev->manufacturer) { - retval = device_create_file(dev, &dev_attr_manufacturer); - if (retval) - goto error; - } - if (udev->product) { - retval = device_create_file(dev, &dev_attr_product); - if (retval) - goto error; - } - if (udev->serial) { - retval = device_create_file(dev, &dev_attr_serial); - if (retval) - goto error; - } - retval = usb_create_ep_files(dev, &udev->ep0, udev); - if (retval) - goto error; - return 0; + return retval; error: usb_remove_sysfs_dev_files(udev); return retval; @@ -637,20 +832,15 @@ void usb_remove_sysfs_dev_files(struct usb_device *udev) { struct device *dev = &udev->dev; - usb_remove_ep_files(&udev->ep0); - device_remove_file(dev, &dev_attr_manufacturer); - device_remove_file(dev, &dev_attr_product); - device_remove_file(dev, &dev_attr_serial); remove_power_attributes(dev); remove_persist_attributes(dev); device_remove_bin_file(dev, &dev_bin_attr_descriptors); - sysfs_remove_group(&dev->kobj, &dev_attr_grp); } -/* Interface Accociation Descriptor fields */ +/* Interface Association Descriptor fields */ #define usb_intf_assoc_attr(field, format_string) \ static ssize_t \ -show_iad_##field(struct device *dev, struct device_attribute *attr, \ +iad_##field##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct usb_interface *intf = to_usb_interface(dev); \ @@ -658,18 +848,18 @@ show_iad_##field(struct device *dev, struct device_attribute *attr, \ return sprintf(buf, format_string, \ intf->intf_assoc->field); \ } \ -static DEVICE_ATTR(iad_##field, S_IRUGO, show_iad_##field, NULL); +static DEVICE_ATTR_RO(iad_##field) -usb_intf_assoc_attr(bFirstInterface, "%02x\n") -usb_intf_assoc_attr(bInterfaceCount, "%02d\n") -usb_intf_assoc_attr(bFunctionClass, "%02x\n") -usb_intf_assoc_attr(bFunctionSubClass, "%02x\n") -usb_intf_assoc_attr(bFunctionProtocol, "%02x\n") +usb_intf_assoc_attr(bFirstInterface, "%02x\n"); +usb_intf_assoc_attr(bInterfaceCount, "%02d\n"); +usb_intf_assoc_attr(bFunctionClass, "%02x\n"); +usb_intf_assoc_attr(bFunctionSubClass, "%02x\n"); +usb_intf_assoc_attr(bFunctionProtocol, "%02x\n"); /* Interface fields */ #define usb_intf_attr(field, format_string) \ static ssize_t \ -show_##field(struct device *dev, struct device_attribute *attr, \ +field##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct usb_interface *intf = to_usb_interface(dev); \ @@ -677,35 +867,31 @@ show_##field(struct device *dev, struct device_attribute *attr, \ return sprintf(buf, format_string, \ intf->cur_altsetting->desc.field); \ } \ -static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); +static DEVICE_ATTR_RO(field) -usb_intf_attr(bInterfaceNumber, "%02x\n") -usb_intf_attr(bAlternateSetting, "%2d\n") -usb_intf_attr(bNumEndpoints, "%02x\n") -usb_intf_attr(bInterfaceClass, "%02x\n") -usb_intf_attr(bInterfaceSubClass, "%02x\n") -usb_intf_attr(bInterfaceProtocol, "%02x\n") +usb_intf_attr(bInterfaceNumber, "%02x\n"); +usb_intf_attr(bAlternateSetting, "%2d\n"); +usb_intf_attr(bNumEndpoints, "%02x\n"); +usb_intf_attr(bInterfaceClass, "%02x\n"); +usb_intf_attr(bInterfaceSubClass, "%02x\n"); +usb_intf_attr(bInterfaceProtocol, "%02x\n"); -static ssize_t show_interface_string(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t interface_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_interface *intf; - struct usb_device *udev; - int len; + char *string; intf = to_usb_interface(dev); - udev = interface_to_usbdev(intf); - len = snprintf(buf, 256, "%s", intf->cur_altsetting->string); - if (len < 0) + string = ACCESS_ONCE(intf->cur_altsetting->string); + if (!string) return 0; - buf[len] = '\n'; - buf[len+1] = 0; - return len+1; + return sprintf(buf, "%s\n", string); } -static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL); +static DEVICE_ATTR_RO(interface); -static ssize_t show_modalias(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct usb_interface *intf; struct usb_device *udev; @@ -713,10 +899,10 @@ static ssize_t show_modalias(struct device *dev, intf = to_usb_interface(dev); udev = interface_to_usbdev(intf); - alt = intf->cur_altsetting; + alt = ACCESS_ONCE(intf->cur_altsetting); return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X" - "ic%02Xisc%02Xip%02X\n", + "ic%02Xisc%02Xip%02Xin%02X\n", le16_to_cpu(udev->descriptor.idVendor), le16_to_cpu(udev->descriptor.idProduct), le16_to_cpu(udev->descriptor.bcdDevice), @@ -725,21 +911,25 @@ static ssize_t show_modalias(struct device *dev, udev->descriptor.bDeviceProtocol, alt->desc.bInterfaceClass, alt->desc.bInterfaceSubClass, - alt->desc.bInterfaceProtocol); + alt->desc.bInterfaceProtocol, + alt->desc.bInterfaceNumber); } -static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL); +static DEVICE_ATTR_RO(modalias); -static struct attribute *intf_assoc_attrs[] = { - &dev_attr_iad_bFirstInterface.attr, - &dev_attr_iad_bInterfaceCount.attr, - &dev_attr_iad_bFunctionClass.attr, - &dev_attr_iad_bFunctionSubClass.attr, - &dev_attr_iad_bFunctionProtocol.attr, - NULL, -}; -static struct attribute_group intf_assoc_attr_grp = { - .attrs = intf_assoc_attrs, -}; +static ssize_t supports_autosuspend_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int s; + + device_lock(dev); + /* Devices will be autosuspended even when an interface isn't claimed */ + s = (!dev->driver || to_usb_driver(dev->driver)->supports_autosuspend); + device_unlock(dev); + + return sprintf(buf, "%u\n", s); +} +static DEVICE_ATTR_RO(supports_autosuspend); static struct attribute *intf_attrs[] = { &dev_attr_bInterfaceNumber.attr, @@ -749,67 +939,64 @@ static struct attribute *intf_attrs[] = { &dev_attr_bInterfaceSubClass.attr, &dev_attr_bInterfaceProtocol.attr, &dev_attr_modalias.attr, + &dev_attr_supports_autosuspend.attr, NULL, }; static struct attribute_group intf_attr_grp = { .attrs = intf_attrs, }; -static inline void usb_create_intf_ep_files(struct usb_interface *intf, - struct usb_device *udev) +static struct attribute *intf_assoc_attrs[] = { + &dev_attr_iad_bFirstInterface.attr, + &dev_attr_iad_bInterfaceCount.attr, + &dev_attr_iad_bFunctionClass.attr, + &dev_attr_iad_bFunctionSubClass.attr, + &dev_attr_iad_bFunctionProtocol.attr, + NULL, +}; + +static umode_t intf_assoc_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) { - struct usb_host_interface *iface_desc; - int i; + struct device *dev = container_of(kobj, struct device, kobj); + struct usb_interface *intf = to_usb_interface(dev); - iface_desc = intf->cur_altsetting; - for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) - usb_create_ep_files(&intf->dev, &iface_desc->endpoint[i], - udev); + if (intf->intf_assoc == NULL) + return 0; + return a->mode; } -static inline void usb_remove_intf_ep_files(struct usb_interface *intf) -{ - struct usb_host_interface *iface_desc; - int i; +static struct attribute_group intf_assoc_attr_grp = { + .attrs = intf_assoc_attrs, + .is_visible = intf_assoc_attrs_are_visible, +}; - iface_desc = intf->cur_altsetting; - for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) - usb_remove_ep_files(&iface_desc->endpoint[i]); -} +const struct attribute_group *usb_interface_groups[] = { + &intf_attr_grp, + &intf_assoc_attr_grp, + NULL +}; -int usb_create_sysfs_intf_files(struct usb_interface *intf) +void usb_create_sysfs_intf_files(struct usb_interface *intf) { - struct device *dev = &intf->dev; struct usb_device *udev = interface_to_usbdev(intf); struct usb_host_interface *alt = intf->cur_altsetting; - int retval; - if (intf->sysfs_files_created) - return 0; - retval = sysfs_create_group(&dev->kobj, &intf_attr_grp); - if (retval) - return retval; + if (intf->sysfs_files_created || intf->unregistering) + return; - if (alt->string == NULL) + if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS)) alt->string = usb_cache_string(udev, alt->desc.iInterface); - if (alt->string) - retval = device_create_file(dev, &dev_attr_interface); - if (intf->intf_assoc) - retval = sysfs_create_group(&dev->kobj, &intf_assoc_attr_grp); - usb_create_intf_ep_files(intf, udev); + if (alt->string && device_create_file(&intf->dev, &dev_attr_interface)) + ; /* We don't actually care if the function fails. */ intf->sysfs_files_created = 1; - return 0; } void usb_remove_sysfs_intf_files(struct usb_interface *intf) { - struct device *dev = &intf->dev; - if (!intf->sysfs_files_created) return; - usb_remove_intf_ep_files(intf); - device_remove_file(dev, &dev_attr_interface); - sysfs_remove_group(&dev->kobj, &intf_attr_grp); - sysfs_remove_group(&intf->dev.kobj, &intf_assoc_attr_grp); + + device_remove_file(&intf->dev, &dev_attr_interface); intf->sysfs_files_created = 0; } |