aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/core
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/Kconfig25
-rw-r--r--drivers/usb/core/Makefile5
-rw-r--r--drivers/usb/core/config.c28
-rw-r--r--drivers/usb/core/hcd.c7
-rw-r--r--drivers/usb/core/hub.c11
-rw-r--r--drivers/usb/core/ledtrig-usbport.c314
-rw-r--r--drivers/usb/core/message.c10
-rw-r--r--drivers/usb/core/of.c1
-rw-r--r--drivers/usb/core/otg_whitelist.h2
-rw-r--r--drivers/usb/core/urb.c4
-rw-r--r--drivers/usb/core/usb.c11
11 files changed, 368 insertions, 50 deletions
diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index dd280108758f..0e5a889742b3 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -83,23 +83,10 @@ config USB_OTG_FSM
Implements OTG Finite State Machine as specified in On-The-Go
and Embedded Host Supplement to the USB Revision 2.0 Specification.
-config USB_ULPI_BUS
- tristate "USB ULPI PHY interface support"
- depends on USB_SUPPORT
+config USB_LEDS_TRIGGER_USBPORT
+ tristate "USB port LED trigger"
+ depends on USB && LEDS_TRIGGERS
help
- UTMI+ Low Pin Interface (ULPI) is specification for a commonly used
- USB 2.0 PHY interface. The ULPI specification defines a standard set
- of registers that can be used to detect the vendor and product which
- allows ULPI to be handled as a bus. This module is the driver for that
- bus.
-
- The ULPI interfaces (the buses) are registered by the drivers for USB
- controllers which support ULPI register access and have ULPI PHY
- attached to them. The ULPI PHY drivers themselves are normal PHY
- drivers.
-
- ULPI PHYs provide often functions such as ADP sensing/probing (OTG
- protocol) and USB charger detection.
-
- To compile this driver as a module, choose M here: the module will
- be called ulpi.
+ This driver allows LEDs to be controlled by USB events. Enabling this
+ trigger allows specifying list of USB ports that should turn on LED
+ when some USB device gets connected.
diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile
index 9780877010b4..b99b871c4b9d 100644
--- a/drivers/usb/core/Makefile
+++ b/drivers/usb/core/Makefile
@@ -5,9 +5,12 @@
usbcore-y := usb.o hub.o hcd.o urb.o message.o driver.o
usbcore-y += config.o file.o buffer.o sysfs.o endpoint.o
usbcore-y += devio.o notify.o generic.o quirks.o devices.o
-usbcore-y += port.o of.o
+usbcore-y += port.o
+usbcore-$(CONFIG_OF) += of.o
usbcore-$(CONFIG_PCI) += hcd-pci.o
usbcore-$(CONFIG_ACPI) += usb-acpi.o
obj-$(CONFIG_USB) += usbcore.o
+
+obj-$(CONFIG_USB_LEDS_TRIGGER_USBPORT) += ledtrig-usbport.o
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 15ce4ab11688..a2d90aca779f 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -240,8 +240,10 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
memcpy(&endpoint->desc, d, n);
INIT_LIST_HEAD(&endpoint->urb_list);
- /* Fix up bInterval values outside the legal range. Use 32 ms if no
- * proper value can be guessed. */
+ /*
+ * Fix up bInterval values outside the legal range.
+ * Use 10 or 8 ms if no proper value can be guessed.
+ */
i = 0; /* i = min, j = max, n = default */
j = 255;
if (usb_endpoint_xfer_int(d)) {
@@ -250,13 +252,15 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
case USB_SPEED_SUPER_PLUS:
case USB_SPEED_SUPER:
case USB_SPEED_HIGH:
- /* Many device manufacturers are using full-speed
+ /*
+ * Many device manufacturers are using full-speed
* bInterval values in high-speed interrupt endpoint
- * descriptors. Try to fix those and fall back to a
- * 32 ms default value otherwise. */
+ * descriptors. Try to fix those and fall back to an
+ * 8-ms default value otherwise.
+ */
n = fls(d->bInterval*8);
if (n == 0)
- n = 9; /* 32 ms = 2^(9-1) uframes */
+ n = 7; /* 8 ms = 2^(7-1) uframes */
j = 16;
/*
@@ -271,10 +275,12 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
}
break;
default: /* USB_SPEED_FULL or _LOW */
- /* For low-speed, 10 ms is the official minimum.
+ /*
+ * For low-speed, 10 ms is the official minimum.
* But some "overclocked" devices might want faster
- * polling so we'll allow it. */
- n = 32;
+ * polling so we'll allow it.
+ */
+ n = 10;
break;
}
} else if (usb_endpoint_xfer_isoc(d)) {
@@ -282,10 +288,10 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
j = 16;
switch (to_usb_device(ddev)->speed) {
case USB_SPEED_HIGH:
- n = 9; /* 32 ms = 2^(9-1) uframes */
+ n = 7; /* 8 ms = 2^(7-1) uframes */
break;
default: /* USB_SPEED_FULL */
- n = 6; /* 32 ms = 2^(6-1) frames */
+ n = 4; /* 8 ms = 2^(4-1) frames */
break;
}
}
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index d2e3f655c26f..479e223f9cff 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -46,6 +46,7 @@
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/phy.h>
+#include <linux/usb/otg.h>
#include "usb.h"
@@ -2517,10 +2518,8 @@ struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
struct usb_hcd *hcd;
hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL);
- if (!hcd) {
- dev_dbg (dev, "hcd alloc failed\n");
+ if (!hcd)
return NULL;
- }
if (primary_hcd == NULL) {
hcd->address0_mutex = kmalloc(sizeof(*hcd->address0_mutex),
GFP_KERNEL);
@@ -3033,7 +3032,7 @@ EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown);
/*-------------------------------------------------------------------------*/
-#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
+#if IS_ENABLED(CONFIG_USB_MON)
const struct usb_mon_operations *mon_ops;
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 1d5fc32d06d0..cbb146736f57 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1823,10 +1823,8 @@ descriptor_error:
dev_info(&intf->dev, "USB hub found\n");
hub = kzalloc(sizeof(*hub), GFP_KERNEL);
- if (!hub) {
- dev_dbg(&intf->dev, "couldn't kmalloc hub struct\n");
+ if (!hub)
return -ENOMEM;
- }
kref_init(&hub->kref);
hub->intfdev = &intf->dev;
@@ -3106,7 +3104,7 @@ static int usb_disable_remote_wakeup(struct usb_device *udev)
USB_CTRL_SET_TIMEOUT);
else
return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
- USB_REQ_CLEAR_FEATURE, USB_RECIP_INTERFACE,
+ USB_REQ_SET_FEATURE, USB_RECIP_INTERFACE,
USB_INTRF_FUNC_SUSPEND, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
}
@@ -5337,11 +5335,10 @@ static int descriptors_changed(struct usb_device *udev,
}
buf = kmalloc(len, GFP_NOIO);
- if (buf == NULL) {
- dev_err(&udev->dev, "no mem to re-read configs after reset\n");
+ if (!buf)
/* assume the worst */
return 1;
- }
+
for (index = 0; index < udev->descriptor.bNumConfigurations; index++) {
old_length = le16_to_cpu(udev->config[index].desc.wTotalLength);
length = usb_get_descriptor(udev, USB_DT_CONFIG, index, buf,
diff --git a/drivers/usb/core/ledtrig-usbport.c b/drivers/usb/core/ledtrig-usbport.c
new file mode 100644
index 000000000000..3ed5162677ad
--- /dev/null
+++ b/drivers/usb/core/ledtrig-usbport.c
@@ -0,0 +1,314 @@
+/*
+ * USB port LED trigger
+ *
+ * Copyright (C) 2016 Rafał Miłecki <rafal@milecki.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+struct usbport_trig_data {
+ struct led_classdev *led_cdev;
+ struct list_head ports;
+ struct notifier_block nb;
+ int count; /* Amount of connected matching devices */
+};
+
+struct usbport_trig_port {
+ struct usbport_trig_data *data;
+ struct usb_device *hub;
+ int portnum;
+ char *port_name;
+ bool observed;
+ struct device_attribute attr;
+ struct list_head list;
+};
+
+/***************************************
+ * Helpers
+ ***************************************/
+
+/**
+ * usbport_trig_usb_dev_observed - Check if dev is connected to observed port
+ */
+static bool usbport_trig_usb_dev_observed(struct usbport_trig_data *usbport_data,
+ struct usb_device *usb_dev)
+{
+ struct usbport_trig_port *port;
+
+ if (!usb_dev->parent)
+ return false;
+
+ list_for_each_entry(port, &usbport_data->ports, list) {
+ if (usb_dev->parent == port->hub &&
+ usb_dev->portnum == port->portnum)
+ return port->observed;
+ }
+
+ return false;
+}
+
+static int usbport_trig_usb_dev_check(struct usb_device *usb_dev, void *data)
+{
+ struct usbport_trig_data *usbport_data = data;
+
+ if (usbport_trig_usb_dev_observed(usbport_data, usb_dev))
+ usbport_data->count++;
+
+ return 0;
+}
+
+/**
+ * usbport_trig_update_count - Recalculate amount of connected matching devices
+ */
+static void usbport_trig_update_count(struct usbport_trig_data *usbport_data)
+{
+ struct led_classdev *led_cdev = usbport_data->led_cdev;
+
+ usbport_data->count = 0;
+ usb_for_each_dev(usbport_data, usbport_trig_usb_dev_check);
+ led_cdev->brightness_set(led_cdev,
+ usbport_data->count ? LED_FULL : LED_OFF);
+}
+
+/***************************************
+ * Device attr
+ ***************************************/
+
+static ssize_t usbport_trig_port_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct usbport_trig_port *port = container_of(attr,
+ struct usbport_trig_port,
+ attr);
+
+ return sprintf(buf, "%d\n", port->observed) + 1;
+}
+
+static ssize_t usbport_trig_port_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct usbport_trig_port *port = container_of(attr,
+ struct usbport_trig_port,
+ attr);
+
+ if (!strcmp(buf, "0") || !strcmp(buf, "0\n"))
+ port->observed = 0;
+ else if (!strcmp(buf, "1") || !strcmp(buf, "1\n"))
+ port->observed = 1;
+ else
+ return -EINVAL;
+
+ usbport_trig_update_count(port->data);
+
+ return size;
+}
+
+static struct attribute *ports_attrs[] = {
+ NULL,
+};
+static const struct attribute_group ports_group = {
+ .name = "ports",
+ .attrs = ports_attrs,
+};
+
+/***************************************
+ * Adding & removing ports
+ ***************************************/
+
+static int usbport_trig_add_port(struct usbport_trig_data *usbport_data,
+ struct usb_device *usb_dev,
+ const char *hub_name, int portnum)
+{
+ struct led_classdev *led_cdev = usbport_data->led_cdev;
+ struct usbport_trig_port *port;
+ size_t len;
+ int err;
+
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
+ if (!port) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ port->data = usbport_data;
+ port->hub = usb_dev;
+ port->portnum = portnum;
+
+ len = strlen(hub_name) + 8;
+ port->port_name = kzalloc(len, GFP_KERNEL);
+ if (!port->port_name) {
+ err = -ENOMEM;
+ goto err_free_port;
+ }
+ snprintf(port->port_name, len, "%s-port%d", hub_name, portnum);
+
+ port->attr.attr.name = port->port_name;
+ port->attr.attr.mode = S_IRUSR | S_IWUSR;
+ port->attr.show = usbport_trig_port_show;
+ port->attr.store = usbport_trig_port_store;
+
+ err = sysfs_add_file_to_group(&led_cdev->dev->kobj, &port->attr.attr,
+ ports_group.name);
+ if (err)
+ goto err_free_port_name;
+
+ list_add_tail(&port->list, &usbport_data->ports);
+
+ return 0;
+
+err_free_port_name:
+ kfree(port->port_name);
+err_free_port:
+ kfree(port);
+err_out:
+ return err;
+}
+
+static int usbport_trig_add_usb_dev_ports(struct usb_device *usb_dev,
+ void *data)
+{
+ struct usbport_trig_data *usbport_data = data;
+ int i;
+
+ for (i = 1; i <= usb_dev->maxchild; i++)
+ usbport_trig_add_port(usbport_data, usb_dev,
+ dev_name(&usb_dev->dev), i);
+
+ return 0;
+}
+
+static void usbport_trig_remove_port(struct usbport_trig_data *usbport_data,
+ struct usbport_trig_port *port)
+{
+ struct led_classdev *led_cdev = usbport_data->led_cdev;
+
+ list_del(&port->list);
+ sysfs_remove_file_from_group(&led_cdev->dev->kobj, &port->attr.attr,
+ ports_group.name);
+ kfree(port->port_name);
+ kfree(port);
+}
+
+static void usbport_trig_remove_usb_dev_ports(struct usbport_trig_data *usbport_data,
+ struct usb_device *usb_dev)
+{
+ struct usbport_trig_port *port, *tmp;
+
+ list_for_each_entry_safe(port, tmp, &usbport_data->ports, list) {
+ if (port->hub == usb_dev)
+ usbport_trig_remove_port(usbport_data, port);
+ }
+}
+
+/***************************************
+ * Init, exit, etc.
+ ***************************************/
+
+static int usbport_trig_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct usbport_trig_data *usbport_data =
+ container_of(nb, struct usbport_trig_data, nb);
+ struct led_classdev *led_cdev = usbport_data->led_cdev;
+ struct usb_device *usb_dev = data;
+ bool observed;
+
+ observed = usbport_trig_usb_dev_observed(usbport_data, usb_dev);
+
+ switch (action) {
+ case USB_DEVICE_ADD:
+ usbport_trig_add_usb_dev_ports(usb_dev, usbport_data);
+ if (observed && usbport_data->count++ == 0)
+ led_cdev->brightness_set(led_cdev, LED_FULL);
+ return NOTIFY_OK;
+ case USB_DEVICE_REMOVE:
+ usbport_trig_remove_usb_dev_ports(usbport_data, usb_dev);
+ if (observed && --usbport_data->count == 0)
+ led_cdev->brightness_set(led_cdev, LED_OFF);
+ return NOTIFY_OK;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static void usbport_trig_activate(struct led_classdev *led_cdev)
+{
+ struct usbport_trig_data *usbport_data;
+ int err;
+
+ usbport_data = kzalloc(sizeof(*usbport_data), GFP_KERNEL);
+ if (!usbport_data)
+ return;
+ usbport_data->led_cdev = led_cdev;
+
+ /* List of ports */
+ INIT_LIST_HEAD(&usbport_data->ports);
+ err = sysfs_create_group(&led_cdev->dev->kobj, &ports_group);
+ if (err)
+ goto err_free;
+ usb_for_each_dev(usbport_data, usbport_trig_add_usb_dev_ports);
+
+ /* Notifications */
+ usbport_data->nb.notifier_call = usbport_trig_notify,
+ led_cdev->trigger_data = usbport_data;
+ usb_register_notify(&usbport_data->nb);
+
+ led_cdev->activated = true;
+ return;
+
+err_free:
+ kfree(usbport_data);
+}
+
+static void usbport_trig_deactivate(struct led_classdev *led_cdev)
+{
+ struct usbport_trig_data *usbport_data = led_cdev->trigger_data;
+ struct usbport_trig_port *port, *tmp;
+
+ if (!led_cdev->activated)
+ return;
+
+ list_for_each_entry_safe(port, tmp, &usbport_data->ports, list) {
+ usbport_trig_remove_port(usbport_data, port);
+ }
+
+ usb_unregister_notify(&usbport_data->nb);
+
+ sysfs_remove_group(&led_cdev->dev->kobj, &ports_group);
+
+ kfree(usbport_data);
+
+ led_cdev->activated = false;
+}
+
+static struct led_trigger usbport_led_trigger = {
+ .name = "usbport",
+ .activate = usbport_trig_activate,
+ .deactivate = usbport_trig_deactivate,
+};
+
+static int __init usbport_trig_init(void)
+{
+ return led_trigger_register(&usbport_led_trigger);
+}
+
+static void __exit usbport_trig_exit(void)
+{
+ led_trigger_unregister(&usbport_led_trigger);
+}
+
+module_init(usbport_trig_init);
+module_exit(usbport_trig_exit);
+
+MODULE_AUTHOR("Rafał Miłecki <rafal@milecki.pl>");
+MODULE_DESCRIPTION("USB port trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 0406a59f0551..3a4707746157 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1760,17 +1760,14 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
nintf = cp->desc.bNumInterfaces;
new_interfaces = kmalloc(nintf * sizeof(*new_interfaces),
GFP_NOIO);
- if (!new_interfaces) {
- dev_err(&dev->dev, "Out of memory\n");
+ if (!new_interfaces)
return -ENOMEM;
- }
for (; n < nintf; ++n) {
new_interfaces[n] = kzalloc(
sizeof(struct usb_interface),
GFP_NOIO);
if (!new_interfaces[n]) {
- dev_err(&dev->dev, "Out of memory\n");
ret = -ENOMEM;
free_interfaces:
while (--n >= 0)
@@ -1862,7 +1859,12 @@ free_interfaces:
intf->dev.bus = &usb_bus_type;
intf->dev.type = &usb_if_device_type;
intf->dev.groups = usb_interface_groups;
+ /*
+ * Please refer to usb_alloc_dev() to see why we set
+ * dma_mask and dma_pfn_offset.
+ */
intf->dev.dma_mask = dev->dev.dma_mask;
+ intf->dev.dma_pfn_offset = dev->dev.dma_pfn_offset;
INIT_WORK(&intf->reset_ws, __usb_queue_reset_device);
intf->minor = -1;
device_initialize(&intf->dev);
diff --git a/drivers/usb/core/of.c b/drivers/usb/core/of.c
index 2289700c31d6..3de4f8873984 100644
--- a/drivers/usb/core/of.c
+++ b/drivers/usb/core/of.c
@@ -18,6 +18,7 @@
*/
#include <linux/of.h>
+#include <linux/usb/of.h>
/**
* usb_of_get_child_node - Find the device node match port number
diff --git a/drivers/usb/core/otg_whitelist.h b/drivers/usb/core/otg_whitelist.h
index a95b0c989c21..085049d37d7a 100644
--- a/drivers/usb/core/otg_whitelist.h
+++ b/drivers/usb/core/otg_whitelist.h
@@ -38,7 +38,7 @@ static struct usb_device_id whitelist_table[] = {
{ USB_DEVICE(0x0525, 0xa4a2), },
#endif
-#if defined(CONFIG_USB_TEST) || defined(CONFIG_USB_TEST_MODULE)
+#if IS_ENABLED(CONFIG_USB_TEST)
/* gadget zero, for testing */
{ USB_DEVICE(0x0525, 0xa4a0), },
#endif
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index c601e25b609f..a9039696476e 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -68,10 +68,8 @@ struct urb *usb_alloc_urb(int iso_packets, gfp_t mem_flags)
urb = kmalloc(sizeof(struct urb) +
iso_packets * sizeof(struct usb_iso_packet_descriptor),
mem_flags);
- if (!urb) {
- printk(KERN_ERR "alloc_urb: kmalloc failed\n");
+ if (!urb)
return NULL;
- }
usb_init_urb(urb);
return urb;
}
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 5e80697ef952..592151461017 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -440,7 +440,18 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
dev->dev.bus = &usb_bus_type;
dev->dev.type = &usb_device_type;
dev->dev.groups = usb_device_groups;
+ /*
+ * Fake a dma_mask/offset for the USB device:
+ * We cannot really use the dma-mapping API (dma_alloc_* and
+ * dma_map_*) for USB devices but instead need to use
+ * usb_alloc_coherent and pass data in 'urb's, but some subsystems
+ * manually look into the mask/offset pair to determine whether
+ * they need bounce buffers.
+ * Note: calling dma_set_mask() on a USB device would set the
+ * mask for the entire HCD, so don't do that.
+ */
dev->dev.dma_mask = bus->controller->dma_mask;
+ dev->dev.dma_pfn_offset = bus->controller->dma_pfn_offset;
set_dev_node(&dev->dev, dev_to_node(bus->controller));
dev->state = USB_STATE_ATTACHED;
dev->lpm_disable_count = 1;
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-06-15 15:18:34 +0000