From david-b@pacbell.net Thu Aug 2 14:27:08 2007 From: David Brownell Date: Wed, 1 Aug 2007 23:58:22 -0700 Subject: USB: gadget: gadget_is_{dualspeed,otg} predicates and cleanup To: Greg KH Cc: linux-usb-devel@lists.sourceforge.net Message-ID: <200708012358.22981.david-b@pacbell.net> Content-Disposition: inline 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/fsl_usb2_udc.c | 9 ++----- drivers/usb/gadget/inode.c | 44 +++++++++++++++++--------------------- drivers/usb/gadget/omap_udc.c | 10 ++------ include/linux/usb_gadget.h | 33 ++++++++++++++++++++++++++++ 4 files changed, 59 insertions(+), 37 deletions(-) --- a/drivers/usb/gadget/fsl_usb2_udc.c +++ b/drivers/usb/gadget/fsl_usb2_udc.c @@ -1090,14 +1090,11 @@ static int fsl_vbus_session(struct usb_g */ 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 fs | 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 fs 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 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); --- a/drivers/usb/gadget/inode.c +++ b/drivers/usb/gadget/inode.c @@ -20,8 +20,7 @@ */ -// #define DEBUG /* data to help fault diagnosis */ -// #define VERBOSE /* extra debug messages (success too) */ +/* #define VERBOSE_DEBUG */ #include #include @@ -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 * /* 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 *gadge 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 *gadge // 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; } --- a/drivers/usb/gadget/omap_udc.c +++ b/drivers/usb/gadget/omap_udc.c @@ -1241,19 +1241,15 @@ static void pullup_enable(struct omap_ud 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 * { u16 devstat; - if (!udc->gadget.is_otg) + if (!gadget_is_otg(udc->gadget)) return; if (OTG_CTRL_REG & OTG_ID) --- a/include/linux/usb_gadget.h +++ b/include/linux/usb_gadget.h @@ -480,6 +480,39 @@ static inline void *get_gadget_data (str /** + * 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 *