From: Michal Nazarewicz <mina86@xxxxxxxxxx> 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@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> --- drivers/usb/Kconfig | 5 +++ drivers/usb/Makefile | 2 + drivers/usb/core/hub.c | 27 ++++++------------ drivers/usb/gadget/amd5536udc.c | 9 +---- drivers/usb/gadget/atmel_usba_udc.c | 9 ++--- drivers/usb/gadget/composite.c | 22 ++------------ drivers/usb/gadget/file_storage.c | 15 ++------- drivers/usb/gadget/fsl_udc_core.c | 53 ++++++++++++---------------------- drivers/usb/gadget/gmidi.c | 11 +------ drivers/usb/gadget/langwell_udc.c | 50 +++++++++++--------------------- drivers/usb/gadget/net2272.c | 4 +- drivers/usb/gadget/net2280.c | 4 +-- drivers/usb/gadget/printer.c | 14 ++------- drivers/usb/gadget/s3c-hsotg.c | 8 +---- drivers/usb/gadget/udc-core.c | 19 +----------- drivers/usb/misc/usbtest.c | 21 +------------ drivers/usb/usb-common.c | 35 +++++++++++++++++++++++ include/linux/usb/ch9.h | 12 ++++++++ 18 files changed, 125 insertions(+), 195 deletions(-) create mode 100644 drivers/usb/usb-common.c diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index 2651852..97c4cc7 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -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 ... diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile index 969b0a5..75eca76 100644 --- a/drivers/usb/Makefile +++ b/drivers/usb/Makefile @@ -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 diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 338f91f..3edc01b 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -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 */ diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c index ded8d6f..4730016 100644 --- a/drivers/usb/gadget/amd5536udc.c +++ b/drivers/usb/gadget/amd5536udc.c @@ -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); diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c index 722c468..271a9d8 100644 --- a/drivers/usb/gadget/atmel_usba_udc.c +++ b/drivers/usb/gadget/atmel_usba_udc.c @@ -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; diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index c77aca1..e74fd55 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -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; diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c index 39ece40..4ac8084 100644 --- a/drivers/usb/gadget/file_storage.c +++ b/drivers/usb/gadget/file_storage.c @@ -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; } diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c index d699350..b2c44e1 100644 --- a/drivers/usb/gadget/fsl_udc_core.c +++ b/drivers/usb/gadget/fsl_udc_core.c @@ -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" : diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c index 8b9220e..893b967 100644 --- a/drivers/usb/gadget/gmidi.c +++ b/drivers/usb/gadget/gmidi.c @@ -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; } diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c index 6e44499..c88158f 100644 --- a/drivers/usb/gadget/langwell_udc.c +++ b/drivers/usb/gadget/langwell_udc.c @@ -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 */ diff --git a/drivers/usb/gadget/net2272.c b/drivers/usb/gadget/net2272.c index 6fef1c0..08a4a36 100644 --- a/drivers/usb/gadget/net2272.c +++ b/drivers/usb/gadget/net2272.c @@ -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]; diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c index 3c14c4e..db508d0 100644 --- a/drivers/usb/gadget/net2280.c +++ b/drivers/usb/gadget/net2280.c @@ -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]; diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c index 5d3e697..68a0efb 100644 --- a/drivers/usb/gadget/printer.c +++ b/drivers/usb/gadget/printer.c @@ -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; } diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c index 39b134d..a552453 100644 --- a/drivers/usb/gadget/s3c-hsotg.c +++ b/drivers/usb/gadget/s3c-hsotg.c @@ -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. */ diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c index 05ba472..5e77a46 100644 --- a/drivers/usb/gadget/udc-core.c +++ b/drivers/usb/gadget/udc-core.c @@ -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); diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index 930962f..bd6d008 100644 --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -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, diff --git a/drivers/usb/usb-common.c b/drivers/usb/usb-common.c new file mode 100644 index 0000000..d29503e --- /dev/null +++ b/drivers/usb/usb-common.c @@ -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"); diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h index 1ded281..f32a64e 100644 --- a/include/linux/usb/ch9.h +++ b/include/linux/usb/ch9.h @@ -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. -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html