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usb: Provide usb_speed_string() function 

In a few places in the kernel, the code prints
a human-readable USB device speed (eg. "high speed").
This involves a switch statement sometimes wrapped
around in ({ ... }) block leading to code repetition.

To mitigate this issue, this commit introduces
usb_speed_string() function, which returns
a human-readable name of provided speed.

It also changes a few places switch was used to use
this new function.  This changes a bit the way the
speed is printed in few instances at the same time
standardising it.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michal Nazarewicz 2011-08-30 17:11:19 +02:00 committed by Greg Kroah-Hartman
parent c58a76cdd7
commit e538dfdae8
18 changed files with 125 additions and 195 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/Kconfig
View File

@ -12,6 +12,11 @@ menuconfig USB_SUPPORT
if USB_SUPPORT
config USB_COMMON
tristate
default y
depends on USB || USB_GADGET
# Host-side USB depends on having a host controller
# NOTE: dummy_hcd is always an option, but it's ignored here ...
# NOTE: SL-811 option should be board-specific ...

2
drivers/usb/Makefile
View File

@ -53,3 +53,5 @@ obj-$(CONFIG_USB_MUSB_HDRC) += musb/
obj-$(CONFIG_USB_RENESAS_USBHS) += renesas_usbhs/
obj-$(CONFIG_USB_OTG_UTILS) += otg/
obj-$(CONFIG_USB_GADGET) += gadget/
obj-$(CONFIG_USB_COMMON) += usb-common.o

27
drivers/usb/core/hub.c
View File

@ -2793,7 +2793,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
int i, j, retval;
unsigned delay = HUB_SHORT_RESET_TIME;
enum usb_device_speed oldspeed = udev->speed;
char *speed, *type;
const char *speed;
int devnum = udev->devnum;
/* root hub ports have a slightly longer reset period
@ -2853,25 +2853,16 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
default:
goto fail;
}
type = "";
switch (udev->speed) {
case USB_SPEED_LOW: speed = "low"; break;
case USB_SPEED_FULL: speed = "full"; break;
case USB_SPEED_HIGH: speed = "high"; break;
case USB_SPEED_SUPER:
speed = "super";
break;
case USB_SPEED_WIRELESS:
speed = "variable";
type = "Wireless ";
break;
default: speed = "?"; break;
}
if (udev->speed == USB_SPEED_WIRELESS)
speed = "variable speed Wireless";
else
speed = usb_speed_string(udev->speed);
if (udev->speed != USB_SPEED_SUPER)
dev_info(&udev->dev,
"%s %s speed %sUSB device number %d using %s\n",
(udev->config) ? "reset" : "new", speed, type,
"%s %s USB device number %d using %s\n",
(udev->config) ? "reset" : "new", speed,
devnum, udev->bus->controller->driver->name);
/* Set up TT records, if needed */

9
drivers/usb/gadget/amd5536udc.c
View File

@ -3005,13 +3005,8 @@ __acquires(dev->lock)
/* link up all endpoints */
udc_setup_endpoints(dev);
if (dev->gadget.speed == USB_SPEED_HIGH) {
dev_info(&dev->pdev->dev, "Connect: speed = %s\n",
"high");
} else if (dev->gadget.speed == USB_SPEED_FULL) {
dev_info(&dev->pdev->dev, "Connect: speed = %s\n",
"full");
}
dev_info(&dev->pdev->dev, "Connect: %s\n",
usb_speed_string(dev->gadget.speed));
/* init ep 0 */
activate_control_endpoints(dev);

9
drivers/usb/gadget/atmel_usba_udc.c
View File

@ -1718,13 +1718,12 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
spin_lock(&udc->lock);
}
if (status & USBA_HIGH_SPEED) {
DBG(DBG_BUS, "High-speed bus reset detected\n");
if (status & USBA_HIGH_SPEED)
udc->gadget.speed = USB_SPEED_HIGH;
} else {
DBG(DBG_BUS, "Full-speed bus reset detected\n");
else
udc->gadget.speed = USB_SPEED_FULL;
}
DBG(DBG_BUS, "%s bus reset detected\n",
usb_speed_string(udc->gadget.speed));
ep0 = &usba_ep[0];
ep0->desc = &usba_ep0_desc;

22
drivers/usb/gadget/composite.c
View File

@ -617,25 +617,9 @@ static int set_config(struct usb_composite_dev *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;
case USB_SPEED_SUPER:
speed = "super";
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;

15
drivers/usb/gadget/file_storage.c
View File

@ -2862,17 +2862,10 @@ static int do_set_config(struct fsg_dev *fsg, u8 new_config)
fsg->config = new_config;
if ((rc = do_set_interface(fsg, 0)) != 0)
fsg->config = 0; // Reset on errors
else {
char *speed;
switch (fsg->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;
}
INFO(fsg, "%s speed config #%d\n", speed, fsg->config);
}
else
INFO(fsg, "%s config #%d\n",
usb_speed_string(fsg->gadget->speed),
fsg->config);
}
return rc;
}

53
drivers/usb/gadget/fsl_udc_core.c
View File

@ -1715,34 +1715,31 @@ static void dtd_complete_irq(struct fsl_udc *udc)
}
}
static inline enum usb_device_speed portscx_device_speed(u32 reg)
{
switch (speed & PORTSCX_PORT_SPEED_MASK) {
case PORTSCX_PORT_SPEED_HIGH:
return USB_SPEED_HIGH;
case PORTSCX_PORT_SPEED_FULL:
return USB_SPEED_FULL;
case PORTSCX_PORT_SPEED_LOW:
return USB_SPEED_LOW;
default:
return USB_SPEED_UNKNOWN;
}
}
/* Process a port change interrupt */
static void port_change_irq(struct fsl_udc *udc)
{
u32 speed;
if (udc->bus_reset)
udc->bus_reset = 0;
/* Bus resetting is finished */
if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
/* Get the speed */
speed = (fsl_readl(&dr_regs->portsc1)
& PORTSCX_PORT_SPEED_MASK);
switch (speed) {
case PORTSCX_PORT_SPEED_HIGH:
udc->gadget.speed = USB_SPEED_HIGH;
break;
case PORTSCX_PORT_SPEED_FULL:
udc->gadget.speed = USB_SPEED_FULL;
break;
case PORTSCX_PORT_SPEED_LOW:
udc->gadget.speed = USB_SPEED_LOW;
break;
default:
udc->gadget.speed = USB_SPEED_UNKNOWN;
break;
}
}
udc->gadget.speed =
portscx_device_speed(fsl_readl(&dr_regs->portsc1));
/* Update USB state */
if (!udc->resume_state)
@ -2167,20 +2164,8 @@ static int fsl_proc_read(char *page, char **start, off_t off, int count,
default:
s = "None"; break;
}
s;} ), ( {
char *s;
switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
case PORTSCX_PORT_SPEED_FULL:
s = "Full Speed"; break;
case PORTSCX_PORT_SPEED_LOW:
s = "Low Speed"; break;
case PORTSCX_PORT_SPEED_HIGH:
s = "High Speed"; break;
default:
s = "Undefined"; break;
}
s;
} ),
s;} ),
usb_speed_string(portscx_device_speed(tmp_reg)),
(tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
"Normal PHY mode" : "Low power mode",
(tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :

11
drivers/usb/gadget/gmidi.c
View File

@ -640,17 +640,8 @@ gmidi_set_config(struct gmidi_device *dev, unsigned number, gfp_t gfp_flags)
if (result) {
gmidi_reset_config(dev);
} else {
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;
}
dev->config = number;
INFO(dev, "%s speed\n", speed);
INFO(dev, "%s speed\n", usb_speed_string(gadget->speed));
}
return result;
}

50
drivers/usb/gadget/langwell_udc.c
View File

@ -1690,20 +1690,7 @@ static ssize_t show_langwell_udc(struct device *_dev,
"BmAttributes: %d\n\n",
LPM_PTS(tmp_reg),
(tmp_reg & LPM_STS) ? 1 : 0,
({
char *s;
switch (LPM_PSPD(tmp_reg)) {
case LPM_SPEED_FULL:
s = "Full Speed"; break;
case LPM_SPEED_LOW:
s = "Low Speed"; break;
case LPM_SPEED_HIGH:
s = "High Speed"; break;
default:
s = "Unknown Speed"; break;
}
s;
}),
usb_speed_string(lpm_device_speed(tmp_reg)),
(tmp_reg & LPM_PFSC) ? "Force Full Speed" : "Not Force",
(tmp_reg & LPM_PHCD) ? "Disabled" : "Enabled",
LPM_BA(tmp_reg));
@ -2647,12 +2634,24 @@ done:
dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
}
static inline enum usb_device_speed lpm_device_speed(u32 reg)
{
switch (LPM_PSPD(reg)) {
case LPM_SPEED_HIGH:
return USB_SPEED_HIGH;
case LPM_SPEED_FULL:
return USB_SPEED_FULL;
case LPM_SPEED_LOW:
return USB_SPEED_LOW;
default:
return USB_SPEED_UNKNOWN;
}
}
/* port change detect interrupt handler */
static void handle_port_change(struct langwell_udc *dev)
{
u32 portsc1, devlc;
u32 speed;
dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
@ -2667,24 +2666,9 @@ static void handle_port_change(struct langwell_udc *dev)
/* bus reset is finished */
if (!(portsc1 & PORTS_PR)) {
/* get the speed */
speed = LPM_PSPD(devlc);
switch (speed) {
case LPM_SPEED_HIGH:
dev->gadget.speed = USB_SPEED_HIGH;
break;
case LPM_SPEED_FULL:
dev->gadget.speed = USB_SPEED_FULL;
break;
case LPM_SPEED_LOW:
dev->gadget.speed = USB_SPEED_LOW;
break;
default:
dev->gadget.speed = USB_SPEED_UNKNOWN;
break;
}
dev_vdbg(&dev->pdev->dev,
"speed = %d, dev->gadget.speed = %d\n",
speed, dev->gadget.speed);
dev->gadget.speed = lpm_device_speed(devlc);
dev_vdbg(&dev->pdev->dev, "dev->gadget.speed = %d\n",
dev->gadget.speed);
}
/* LPM L0 to L1 */

4
drivers/usb/gadget/net2272.c
View File

@ -1764,8 +1764,8 @@ net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat)
dev->gadget.speed = USB_SPEED_HIGH;
else
dev->gadget.speed = USB_SPEED_FULL;
dev_dbg(dev->dev, "%s speed\n",
(dev->gadget.speed == USB_SPEED_HIGH) ? "high" : "full");
dev_dbg(dev->dev, "%s\n",
usb_speed_string(dev->gadget.speed));
}
ep = &dev->ep[0];

4
drivers/usb/gadget/net2280.c
View File

@ -2257,9 +2257,7 @@ static void handle_stat0_irqs (struct net2280 *dev, u32 stat)
else
dev->gadget.speed = USB_SPEED_FULL;
net2280_led_speed (dev, dev->gadget.speed);
DEBUG (dev, "%s speed\n",
(dev->gadget.speed == USB_SPEED_HIGH)
? "high" : "full");
DEBUG(dev, "%s\n", usb_speed_string(dev->gadget.speed));
}
ep = &dev->ep [0];

14
drivers/usb/gadget/printer.c
View File

@ -962,23 +962,15 @@ printer_set_config(struct printer_dev *dev, unsigned number)
usb_gadget_vbus_draw(dev->gadget,
dev->gadget->is_otg ? 8 : 100);
} else {
char *speed;
unsigned power;
power = 2 * config_desc.bMaxPower;
usb_gadget_vbus_draw(dev->gadget, power);
switch (gadget->speed) {
case USB_SPEED_FULL: speed = "full"; break;
#ifdef CONFIG_USB_GADGET_DUALSPEED
case USB_SPEED_HIGH: speed = "high"; break;
#endif
default: speed = "?"; break;
}
dev->config = number;
INFO(dev, "%s speed config #%d: %d mA, %s\n",
speed, number, power, driver_desc);
INFO(dev, "%s config #%d: %d mA, %s\n",
usb_speed_string(gadget->speed),
number, power, driver_desc);
}
return result;
}

8
drivers/usb/gadget/s3c-hsotg.c
View File

@ -1951,30 +1951,26 @@ static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
case S3C_DSTS_EnumSpd_FS:
case S3C_DSTS_EnumSpd_FS48:
hsotg->gadget.speed = USB_SPEED_FULL;
dev_info(hsotg->dev, "new device is full-speed\n");
ep0_mps = EP0_MPS_LIMIT;
ep_mps = 64;
break;
case S3C_DSTS_EnumSpd_HS:
dev_info(hsotg->dev, "new device is high-speed\n");
hsotg->gadget.speed = USB_SPEED_HIGH;
ep0_mps = EP0_MPS_LIMIT;
ep_mps = 512;
break;
case S3C_DSTS_EnumSpd_LS:
hsotg->gadget.speed = USB_SPEED_LOW;
dev_info(hsotg->dev, "new device is low-speed\n");
/* note, we don't actually support LS in this driver at the
* moment, and the documentation seems to imply that it isn't
* supported by the PHYs on some of the devices.
*/
break;
}
dev_info(hsotg->dev, "new device is %s\n",
usb_speed_string(hsotg->gadget.speed));
/* we should now know the maximum packet size for an
* endpoint, so set the endpoints to a default value. */

19
drivers/usb/gadget/udc-core.c
View File

@ -375,23 +375,8 @@ static ssize_t usb_udc_speed_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
struct usb_gadget *gadget = udc->gadget;
switch (gadget->speed) {
case USB_SPEED_LOW:
return snprintf(buf, PAGE_SIZE, "low-speed\n");
case USB_SPEED_FULL:
return snprintf(buf, PAGE_SIZE, "full-speed\n");
case USB_SPEED_HIGH:
return snprintf(buf, PAGE_SIZE, "high-speed\n");
case USB_SPEED_WIRELESS:
return snprintf(buf, PAGE_SIZE, "wireless\n");
case USB_SPEED_SUPER:
return snprintf(buf, PAGE_SIZE, "super-speed\n");
case USB_SPEED_UNKNOWN: /* FALLTHROUGH */
default:
return snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
}
return snprintf(buf, PAGE_SIZE, "%s\n",
usb_speed_string(udc->gadget->speed));
}
static DEVICE_ATTR(speed, S_IRUSR, usb_udc_speed_show, NULL);

21
drivers/usb/misc/usbtest.c
View File

@ -2300,25 +2300,8 @@ usbtest_probe(struct usb_interface *intf, const struct usb_device_id *id)
usb_set_intfdata(intf, dev);
dev_info(&intf->dev, "%s\n", info->name);
dev_info(&intf->dev, "%s speed {control%s%s%s%s%s} tests%s\n",
({ char *tmp;
switch (udev->speed) {
case USB_SPEED_LOW:
tmp = "low";
break;
case USB_SPEED_FULL:
tmp = "full";
break;
case USB_SPEED_HIGH:
tmp = "high";
break;
case USB_SPEED_SUPER:
tmp = "super";
break;
default:
tmp = "unknown";
break;
}; tmp; }),
dev_info(&intf->dev, "%s {control%s%s%s%s%s} tests%s\n",
usb_speed_string(udev->speed),
info->ctrl_out ? " in/out" : "",
rtest, wtest,
irtest, iwtest,

35
drivers/usb/usb-common.c Normal file
View File

@ -0,0 +1,35 @@
/*
* Provides code common for host and device side USB.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2.
*
* If either host side (ie. CONFIG_USB=y) or device side USB stack
* (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is
* compiled-in as well. Otherwise, if either of the two stacks is
* compiled as module, this file is compiled as module as well.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb/ch9.h>
const char *usb_speed_string(enum usb_device_speed speed)
{
static const char *const names[] = {
[USB_SPEED_UNKNOWN] = "UNKNOWN",
[USB_SPEED_LOW] = "low-speed",
[USB_SPEED_FULL] = "full-speed",
[USB_SPEED_HIGH] = "high-speed",
[USB_SPEED_WIRELESS] = "wireless",
[USB_SPEED_SUPER] = "super-speed",
};
if (speed < 0 || speed >= ARRAY_SIZE(names))
speed = USB_SPEED_UNKNOWN;
return names[speed];
}
EXPORT_SYMBOL_GPL(usb_speed_string);
MODULE_LICENSE("GPL");

12
include/linux/usb/ch9.h
View File

@ -868,6 +868,18 @@ enum usb_device_speed {
USB_SPEED_SUPER, /* usb 3.0 */
};
#ifdef __KERNEL__
/**
* usb_speed_string() - Returns human readable-name of the speed.
* @speed: The speed to return human-readable name for. If it's not
* any of the speeds defined in usb_device_speed enum, string for
* USB_SPEED_UNKNOWN will be returned.
*/
extern const char *usb_speed_string(enum usb_device_speed speed);
#endif
enum usb_device_state {
/* NOTATTACHED isn't in the USB spec, and this state acts
* the same as ATTACHED ... but it's clearer this way.