diff options
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 297 |
1 files changed, 224 insertions, 73 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 55d8f575206d..e7c982377488 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -11,21 +11,22 @@ #include <linux/kernel.h> +#include <linux/string.h> #include <linux/usb.h> #include "usb.h" /* Active configuration fields */ #define usb_actconfig_show(field, multiplier, format_string) \ -static ssize_t show_##field (struct device *dev, \ +static ssize_t show_##field(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct usb_device *udev; \ struct usb_host_config *actconfig; \ \ - udev = to_usb_device (dev); \ + udev = to_usb_device(dev); \ actconfig = udev->actconfig; \ if (actconfig) \ - return sprintf (buf, format_string, \ + return sprintf(buf, format_string, \ actconfig->desc.field * multiplier); \ else \ return 0; \ @@ -35,9 +36,9 @@ static ssize_t show_##field (struct device *dev, \ usb_actconfig_show(field, multiplier, format_string) \ static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); -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, 1, "%2d\n") +usb_actconfig_attr(bmAttributes, 1, "%2x\n") +usb_actconfig_attr(bMaxPower, 2, "%3dmA\n") static ssize_t show_configuration_string(struct device *dev, struct device_attribute *attr, char *buf) @@ -45,7 +46,7 @@ static ssize_t show_configuration_string(struct device *dev, struct usb_device *udev; struct usb_host_config *actconfig; - udev = to_usb_device (dev); + udev = to_usb_device(dev); actconfig = udev->actconfig; if ((!actconfig) || (!actconfig->string)) return 0; @@ -57,16 +58,16 @@ static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL); usb_actconfig_show(bConfigurationValue, 1, "%u\n"); static ssize_t -set_bConfigurationValue (struct device *dev, struct device_attribute *attr, +set_bConfigurationValue(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct usb_device *udev = to_usb_device (dev); + struct usb_device *udev = to_usb_device(dev); int config, value; - if (sscanf (buf, "%u", &config) != 1 || config > 255) + if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255) return -EINVAL; usb_lock_device(udev); - value = usb_set_configuration (udev, config); + value = usb_set_configuration(udev, config); usb_unlock_device(udev); return (value < 0) ? value : count; } @@ -81,7 +82,7 @@ static ssize_t show_##name(struct device *dev, \ { \ struct usb_device *udev; \ \ - udev = to_usb_device (dev); \ + udev = to_usb_device(dev); \ return sprintf(buf, "%s\n", udev->name); \ } \ static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); @@ -91,12 +92,12 @@ usb_string_attr(manufacturer); usb_string_attr(serial); static ssize_t -show_speed (struct device *dev, struct device_attribute *attr, char *buf) +show_speed(struct device *dev, struct device_attribute *attr, char *buf) { struct usb_device *udev; char *speed; - udev = to_usb_device (dev); + udev = to_usb_device(dev); switch (udev->speed) { case USB_SPEED_LOW: @@ -112,22 +113,32 @@ show_speed (struct device *dev, struct device_attribute *attr, char *buf) default: speed = "unknown"; } - return sprintf (buf, "%s\n", speed); + return sprintf(buf, "%s\n", speed); } static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL); static ssize_t -show_devnum (struct device *dev, struct device_attribute *attr, char *buf) +show_busnum(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 ssize_t +show_devnum(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); + udev = to_usb_device(dev); + return sprintf(buf, "%d\n", udev->devnum); } static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL); static ssize_t -show_version (struct device *dev, struct device_attribute *attr, char *buf) +show_version(struct device *dev, struct device_attribute *attr, char *buf) { struct usb_device *udev; u16 bcdUSB; @@ -139,25 +150,170 @@ show_version (struct device *dev, struct device_attribute *attr, char *buf) static DEVICE_ATTR(version, S_IRUGO, show_version, NULL); static ssize_t -show_maxchild (struct device *dev, struct device_attribute *attr, char *buf) +show_maxchild(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); + udev = to_usb_device(dev); + return sprintf(buf, "%d\n", udev->maxchild); } static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL); +static ssize_t +show_quirks(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); + +#ifdef CONFIG_USB_SUSPEND + +static ssize_t +show_autosuspend(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); +} + +static ssize_t +set_autosuspend(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) + 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); + } + return count; +} + +static DEVICE_ATTR(autosuspend, S_IRUGO | S_IWUSR, + show_autosuspend, set_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) +{ + 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; + } + return sprintf(buf, "%s\n", p); +} + +static ssize_t +set_level(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; + + cp = memchr(buf, '\n', count); + if (cp) + len = cp - buf; + + usb_lock_device(udev); + + /* 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 + rc = -EINVAL; + + usb_unlock_device(udev); + return (rc < 0 ? rc : count); +} + +static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level); + +static char power_group[] = "power"; + +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); + } + return rc; +} + +static void remove_power_attributes(struct device *dev) +{ + 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); +} + +#else + +#define add_power_attributes(dev) 0 +#define remove_power_attributes(dev) do {} while (0) + +#endif /* CONFIG_USB_SUSPEND */ + /* Descriptor fields */ #define usb_descriptor_attr_le16(field, format_string) \ static ssize_t \ -show_##field (struct device *dev, struct device_attribute *attr, \ +show_##field(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct usb_device *udev; \ \ - udev = to_usb_device (dev); \ - return sprintf (buf, format_string, \ + udev = to_usb_device(dev); \ + return sprintf(buf, format_string, \ le16_to_cpu(udev->descriptor.field)); \ } \ static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); @@ -168,21 +324,21 @@ 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, \ +show_##field(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct usb_device *udev; \ \ - udev = to_usb_device (dev); \ - return sprintf (buf, format_string, udev->descriptor.field); \ + 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") +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 struct attribute *dev_attrs[] = { /* current configuration's attributes */ @@ -201,9 +357,11 @@ static struct attribute *dev_attrs[] = { &dev_attr_bNumConfigurations.attr, &dev_attr_bMaxPacketSize0.attr, &dev_attr_speed.attr, + &dev_attr_busnum.attr, &dev_attr_devnum.attr, &dev_attr_version.attr, &dev_attr_maxchild.attr, + &dev_attr_quirks.attr, NULL, }; static struct attribute_group dev_attr_grp = { @@ -219,18 +377,22 @@ int usb_create_sysfs_dev_files(struct usb_device *udev) if (retval) return retval; + retval = add_power_attributes(dev); + if (retval) + goto error; + if (udev->manufacturer) { - retval = device_create_file (dev, &dev_attr_manufacturer); + retval = device_create_file(dev, &dev_attr_manufacturer); if (retval) goto error; } if (udev->product) { - retval = device_create_file (dev, &dev_attr_product); + retval = device_create_file(dev, &dev_attr_product); if (retval) goto error; } if (udev->serial) { - retval = device_create_file (dev, &dev_attr_serial); + retval = device_create_file(dev, &dev_attr_serial); if (retval) goto error; } @@ -239,47 +401,41 @@ int usb_create_sysfs_dev_files(struct usb_device *udev) goto error; return 0; error: - 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); + usb_remove_sysfs_dev_files(udev); return retval; } -void usb_remove_sysfs_dev_files (struct usb_device *udev) +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); sysfs_remove_group(&dev->kobj, &dev_attr_grp); - - if (udev->manufacturer) - device_remove_file(dev, &dev_attr_manufacturer); - if (udev->product) - device_remove_file(dev, &dev_attr_product); - if (udev->serial) - device_remove_file(dev, &dev_attr_serial); } /* Interface fields */ #define usb_intf_attr(field, format_string) \ static ssize_t \ -show_##field (struct device *dev, struct device_attribute *attr, \ +show_##field(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ - struct usb_interface *intf = to_usb_interface (dev); \ + struct usb_interface *intf = to_usb_interface(dev); \ \ - return sprintf (buf, format_string, \ + return sprintf(buf, format_string, \ intf->cur_altsetting->desc.field); \ } \ static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); -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) @@ -288,8 +444,8 @@ static ssize_t show_interface_string(struct device *dev, struct usb_device *udev; int len; - intf = to_usb_interface (dev); - udev = interface_to_usbdev (intf); + intf = to_usb_interface(dev); + udev = interface_to_usbdev(intf); len = snprintf(buf, 256, "%s", intf->cur_altsetting->string); if (len < 0) return 0; @@ -362,33 +518,28 @@ static inline void usb_remove_intf_ep_files(struct usb_interface *intf) int 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; - retval = sysfs_create_group(&intf->dev.kobj, &intf_attr_grp); + retval = sysfs_create_group(&dev->kobj, &intf_attr_grp); if (retval) - goto error; + return retval; if (alt->string == NULL) alt->string = usb_cache_string(udev, alt->desc.iInterface); if (alt->string) - retval = device_create_file(&intf->dev, &dev_attr_interface); + retval = device_create_file(dev, &dev_attr_interface); usb_create_intf_ep_files(intf, udev); return 0; -error: - if (alt->string) - device_remove_file(&intf->dev, &dev_attr_interface); - sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp); - usb_remove_intf_ep_files(intf); - return retval; } -void usb_remove_sysfs_intf_files (struct usb_interface *intf) +void usb_remove_sysfs_intf_files(struct usb_interface *intf) { - usb_remove_intf_ep_files(intf); - sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp); + struct device *dev = &intf->dev; - if (intf->cur_altsetting->string) - device_remove_file(&intf->dev, &dev_attr_interface); + usb_remove_intf_ep_files(intf); + device_remove_file(dev, &dev_attr_interface); + sysfs_remove_group(&dev->kobj, &intf_attr_grp); } |