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USB: gadget: gadget_is_{dualspeed,otg} predicates and cleanup 

This adds two small inlines to the gadget stack, which will
often evaluate to compile-time constants.  That can help
shrink object code and remove #ifdeffery.

 - gadget_is_dualspeed(), currently always a compile-time
   constant (depending on which controller is selected).

 - gadget_is_otg(), usually a compile time "false", but this
   is a runtime test if the platform enables OTG (since it's
   reasonable to populate boards with different USB sockets).

It also updates two peripheral controller drivers to use these:

 - fsl_usb2_udc, mostly OTG-related bugfixes:  non-OTG devices
   must follow the rules about drawing VBUS power, and OTG ones
   need to reject invalid SET_FEATURE requests.

 - omap_udc, just scrubbing a bit of #ifdeffery.

And also gadgetfs, which lost some #ifdefs and moved to a more
standard handling of DEBUG and VERBOSE_DEBUG.

The main benefits come from patches which will follow.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2007-08-01 23:58:22 -07:00 committed by Greg Kroah-Hartman
parent a1d534bb23
commit a4e3ef5597
4 changed files with 59 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/usb/gadget/fsl_usb2_udc.c
View File

@ -1090,14 +1090,11 @@ static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
*/
static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
{
#ifdef CONFIG_USB_OTG
struct fsl_udc *udc;
udc = container_of(gadget, struct fsl_udc, gadget);
if (udc->transceiver)
return otg_set_power(udc->transceiver, mA);
#endif
return -ENOTSUPP;
}
@ -1321,7 +1318,7 @@ static void setup_received_irq(struct fsl_udc *udc,
| USB_TYPE_STANDARD)) {
/* Note: The driver has not include OTG support yet.
* This will be set when OTG support is added */
if (!udc->gadget.is_otg)
if (!gadget_is_otg(udc->gadget))
break;
else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
udc->gadget.b_hnp_enable = 1;
@ -1330,6 +1327,8 @@ static void setup_received_irq(struct fsl_udc *udc,
else if (setup->bRequest ==
USB_DEVICE_A_ALT_HNP_SUPPORT)
udc->gadget.a_alt_hnp_support = 1;
else
break;
rc = 0;
} else
break;
@ -1840,10 +1839,8 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
if (!driver || driver != udc_controller->driver || !driver->unbind)
return -EINVAL;
#ifdef CONFIG_USB_OTG
if (udc_controller->transceiver)
(void)otg_set_peripheral(udc_controller->transceiver, 0);
#endif
/* stop DR, disable intr */
dr_controller_stop(udc_controller);

44
drivers/usb/gadget/inode.c
View File

@ -20,8 +20,7 @@
*/
// #define DEBUG /* data to help fault diagnosis */
// #define VERBOSE /* extra debug messages (success too) */
/* #define VERBOSE_DEBUG */
#include <linux/init.h>
#include <linux/module.h>
@ -253,7 +252,7 @@ static const char *CHIP;
do { } while (0)
#endif /* DEBUG */
#ifdef VERBOSE
#ifdef VERBOSE_DEBUG
#define VDEBUG DBG
#else
#define VDEBUG(dev,fmt,args...) \
@ -1010,11 +1009,12 @@ ep0_read (struct file *fd, char __user *buf, size_t len, loff_t *ptr)
/* assume that was SET_CONFIGURATION */
if (dev->current_config) {
unsigned power;
#ifdef CONFIG_USB_GADGET_DUALSPEED
if (dev->gadget->speed == USB_SPEED_HIGH)
if (gadget_is_dualspeed(dev->gadget)
&& (dev->gadget->speed
== USB_SPEED_HIGH))
power = dev->hs_config->bMaxPower;
else
#endif
power = dev->config->bMaxPower;
usb_gadget_vbus_draw(dev->gadget, 2 * power);
}
@ -1355,24 +1355,21 @@ static int
config_buf (struct dev_data *dev, u8 type, unsigned index)
{
int len;
#ifdef CONFIG_USB_GADGET_DUALSPEED
int hs;
#endif
int hs = 0;
/* only one configuration */
if (index > 0)
return -EINVAL;
#ifdef CONFIG_USB_GADGET_DUALSPEED
hs = (dev->gadget->speed == USB_SPEED_HIGH);
if (type == USB_DT_OTHER_SPEED_CONFIG)
hs = !hs;
if (gadget_is_dualspeed(dev->gadget)) {
hs = (dev->gadget->speed == USB_SPEED_HIGH);
if (type == USB_DT_OTHER_SPEED_CONFIG)
hs = !hs;
}
if (hs) {
dev->req->buf = dev->hs_config;
len = le16_to_cpu(dev->hs_config->wTotalLength);
} else
#endif
{
} else {
dev->req->buf = dev->config;
len = le16_to_cpu(dev->config->wTotalLength);
}
@ -1393,13 +1390,13 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
spin_lock (&dev->lock);
dev->setup_abort = 0;
if (dev->state == STATE_DEV_UNCONNECTED) {
#ifdef CONFIG_USB_GADGET_DUALSPEED
if (gadget->speed == USB_SPEED_HIGH && dev->hs_config == NULL) {
if (gadget_is_dualspeed(gadget)
&& gadget->speed == USB_SPEED_HIGH
&& dev->hs_config == NULL) {
spin_unlock(&dev->lock);
ERROR (dev, "no high speed config??\n");
return -EINVAL;
}
#endif /* CONFIG_USB_GADGET_DUALSPEED */
dev->state = STATE_DEV_CONNECTED;
dev->dev->bMaxPacketSize0 = gadget->ep0->maxpacket;
@ -1469,13 +1466,12 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
// user mode expected to disable endpoints
} else {
u8 config, power;
#ifdef CONFIG_USB_GADGET_DUALSPEED
if (gadget->speed == USB_SPEED_HIGH) {
if (gadget_is_dualspeed(gadget)
&& gadget->speed == USB_SPEED_HIGH) {
config = dev->hs_config->bConfigurationValue;
power = dev->hs_config->bMaxPower;
} else
#endif
{
} else {
config = dev->config->bConfigurationValue;
power = dev->config->bMaxPower;
}

10
drivers/usb/gadget/omap_udc.c
View File

@ -1241,19 +1241,15 @@ static void pullup_enable(struct omap_udc *udc)
udc->gadget.dev.parent->power.power_state = PMSG_ON;
udc->gadget.dev.power.power_state = PMSG_ON;
UDC_SYSCON1_REG |= UDC_PULLUP_EN;
#ifndef CONFIG_USB_OTG
if (!cpu_is_omap15xx())
if (!gadget_is_otg(udc->gadget) && !cpu_is_omap15xx())
OTG_CTRL_REG |= OTG_BSESSVLD;
#endif
UDC_IRQ_EN_REG = UDC_DS_CHG_IE;
}
static void pullup_disable(struct omap_udc *udc)
{
#ifndef CONFIG_USB_OTG
if (!cpu_is_omap15xx())
if (!gadget_is_otg(udc->gadget) && !cpu_is_omap15xx())
OTG_CTRL_REG &= ~OTG_BSESSVLD;
#endif
UDC_IRQ_EN_REG = UDC_DS_CHG_IE;
UDC_SYSCON1_REG &= ~UDC_PULLUP_EN;
}
@ -1390,7 +1386,7 @@ static void update_otg(struct omap_udc *udc)
{
u16 devstat;
if (!udc->gadget.is_otg)
if (!gadget_is_otg(udc->gadget))
return;
if (OTG_CTRL_REG & OTG_ID)

33
include/linux/usb_gadget.h
View File

@ -479,6 +479,39 @@ static inline void *get_gadget_data (struct usb_gadget *gadget)
list_for_each_entry(tmp, &(gadget)->ep_list, ep_list)
/**
* gadget_is_dualspeed - return true iff the hardware handles high speed
* @gadget: controller that might support both high and full speeds
*/
static inline int gadget_is_dualspeed(struct usb_gadget *g)
{
#ifdef CONFIG_USB_GADGET_DUALSPEED
/* runtime test would check "g->is_dualspeed" ... that might be
* useful to work around hardware bugs, but is mostly pointless
*/
return 1;
#else
return 0;
#endif
}
/**
* gadget_is_otg - return true iff the hardware is OTG-ready
* @gadget: controller that might have a Mini-AB connector
*
* This is a runtime test, since kernels with a USB-OTG stack sometimes
* run on boards which only have a Mini-B (or Mini-A) connector.
*/
static inline int gadget_is_otg(struct usb_gadget *g)
{
#ifdef CONFIG_USB_OTG
return g->is_otg;
#else
return 0;
#endif
}
/**
* usb_gadget_frame_number - returns the current frame number
* @gadget: controller that reports the frame number