[PATCH 023/142] USB: gadget: serial gadget cleanups
Greg Kroah-Hartman <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
From: David Brownell <[email protected]> Clean up the serial gadget, using newer APIs and conventions: - gadget_is_dualspeed() and gadget_is_otg() ... #ifdef removal - Remove many now-needless #includes - Use the DEBUG and VERBOSE_DEBUG conventions; turned up a bug in the original debug messaging - Various whitespace fixes. This gave only a minor object code shrinkage, but the source looks much cleaner in various places. Signed-off-by: David Brownell <[email protected]> Cc: Al Borchers <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/gadget/serial.c | 166 +++++++++++++++++++------------------------ 1 files changed, 73 insertions(+), 93 deletions(-) diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c index ce4d2e0..afdf71f 100644 --- a/drivers/usb/gadget/serial.c +++ b/drivers/usb/gadget/serial.c @@ -17,30 +17,11 @@ * */ -#include <linux/module.h> #include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/timer.h> -#include <linux/list.h> -#include <linux/interrupt.h> #include <linux/utsname.h> -#include <linux/wait.h> -#include <linux/proc_fs.h> #include <linux/device.h> #include <linux/tty.h> #include <linux/tty_flip.h> -#include <linux/mutex.h> - -#include <asm/byteorder.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/system.h> -#include <asm/unaligned.h> -#include <asm/uaccess.h> #include <linux/usb/ch9.h> #include <linux/usb/cdc.h> @@ -89,30 +70,29 @@ #define GS_DEFAULT_PARITY USB_CDC_NO_PARITY #define GS_DEFAULT_CHAR_FORMAT USB_CDC_1_STOP_BITS -/* select highspeed/fullspeed, hiding highspeed if not configured */ -#ifdef CONFIG_USB_GADGET_DUALSPEED -#define GS_SPEED_SELECT(is_hs,hs,fs) ((is_hs) ? (hs) : (fs)) -#else -#define GS_SPEED_SELECT(is_hs,hs,fs) (fs) -#endif /* CONFIG_USB_GADGET_DUALSPEED */ +/* maxpacket and other transfer characteristics vary by speed. */ +static inline struct usb_endpoint_descriptor * +choose_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, + struct usb_endpoint_descriptor *fs) +{ + if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) + return hs; + return fs; +} + /* debug settings */ -#ifdef GS_DEBUG +#ifdef DEBUG static int debug = 1; +#else +#define debug 0 +#endif #define gs_debug(format, arg...) \ do { if (debug) printk(KERN_DEBUG format, ## arg); } while(0) #define gs_debug_level(level, format, arg...) \ do { if (debug>=level) printk(KERN_DEBUG format, ## arg); } while(0) -#else - -#define gs_debug(format, arg...) \ - do { } while(0) -#define gs_debug_level(level, format, arg...) \ - do { } while(0) - -#endif /* GS_DEBUG */ /* Thanks to NetChip Technologies for donating this product ID. * @@ -147,10 +127,10 @@ struct gs_req_entry { /* the port structure holds info for each port, one for each minor number */ struct gs_port { - struct gs_dev *port_dev; /* pointer to device struct */ + struct gs_dev *port_dev; /* pointer to device struct */ struct tty_struct *port_tty; /* pointer to tty struct */ spinlock_t port_lock; - int port_num; + int port_num; int port_open_count; int port_in_use; /* open/close in progress */ wait_queue_head_t port_write_wait;/* waiting to write */ @@ -188,7 +168,7 @@ static void __exit gs_module_exit(void); /* tty driver */ static int gs_open(struct tty_struct *tty, struct file *file); static void gs_close(struct tty_struct *tty, struct file *file); -static int gs_write(struct tty_struct *tty, +static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count); static void gs_put_char(struct tty_struct *tty, unsigned char ch); static void gs_flush_chars(struct tty_struct *tty); @@ -222,7 +202,7 @@ static void gs_setup_complete(struct usb_ep *ep, struct usb_request *req); static void gs_disconnect(struct usb_gadget *gadget); static int gs_set_config(struct gs_dev *dev, unsigned config); static void gs_reset_config(struct gs_dev *dev); -static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed, +static int gs_build_config_buf(u8 *buf, struct usb_gadget *g, u8 type, unsigned int index, int is_otg); static struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned int len, @@ -415,18 +395,18 @@ static const struct usb_cdc_header_desc gs_header_desc = { }; static const struct usb_cdc_call_mgmt_descriptor gs_call_mgmt_descriptor = { - .bLength = sizeof(gs_call_mgmt_descriptor), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, - .bmCapabilities = 0, - .bDataInterface = 1, /* index of data interface */ + .bLength = sizeof(gs_call_mgmt_descriptor), + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, + .bmCapabilities = 0, + .bDataInterface = 1, /* index of data interface */ }; static struct usb_cdc_acm_descriptor gs_acm_descriptor = { - .bLength = sizeof(gs_acm_descriptor), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubType = USB_CDC_ACM_TYPE, - .bmCapabilities = 0, + .bLength = sizeof(gs_acm_descriptor), + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubType = USB_CDC_ACM_TYPE, + .bmCapabilities = 0, }; static const struct usb_cdc_union_desc gs_union_desc = { @@ -436,7 +416,7 @@ static const struct usb_cdc_union_desc gs_union_desc = { .bMasterInterface0 = 0, /* index of control interface */ .bSlaveInterface0 = 1, /* index of data interface */ }; - + static struct usb_endpoint_descriptor gs_fullspeed_notify_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, @@ -482,7 +462,6 @@ static const struct usb_descriptor_header *gs_acm_fullspeed_function[] = { NULL, }; -#ifdef CONFIG_USB_GADGET_DUALSPEED static struct usb_endpoint_descriptor gs_highspeed_notify_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, @@ -536,15 +515,13 @@ static const struct usb_descriptor_header *gs_acm_highspeed_function[] = { NULL, }; -#endif /* CONFIG_USB_GADGET_DUALSPEED */ - /* Module */ MODULE_DESCRIPTION(GS_LONG_NAME); MODULE_AUTHOR("Al Borchers"); MODULE_LICENSE("GPL"); -#ifdef GS_DEBUG +#ifdef DEBUG module_param(debug, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(debug, "Enable debugging, 0=off, 1=on"); #endif @@ -915,7 +892,8 @@ static void gs_put_char(struct tty_struct *tty, unsigned char ch) return; } - gs_debug("gs_put_char: (%d,%p) char=0x%x, called from %p, %p, %p\n", port->port_num, tty, ch, __builtin_return_address(0), __builtin_return_address(1), __builtin_return_address(2)); + gs_debug("gs_put_char: (%d,%p) char=0x%x, called from %p\n", + port->port_num, tty, ch, __builtin_return_address(0)); spin_lock_irqsave(&port->port_lock, flags); @@ -1116,7 +1094,11 @@ static int gs_send(struct gs_dev *dev) len = gs_send_packet(dev, req->buf, ep->maxpacket); if (len > 0) { -gs_debug_level(3, "gs_send: len=%d, 0x%2.2x 0x%2.2x 0x%2.2x ...\n", len, *((unsigned char *)req->buf), *((unsigned char *)req->buf+1), *((unsigned char *)req->buf+2)); + gs_debug_level(3, "gs_send: len=%d, 0x%2.2x " + "0x%2.2x 0x%2.2x ...\n", len, + *((unsigned char *)req->buf), + *((unsigned char *)req->buf+1), + *((unsigned char *)req->buf+2)); list_del(&req_entry->re_entry); req->length = len; spin_unlock_irqrestore(&dev->dev_lock, flags); @@ -1269,7 +1251,7 @@ static void gs_read_complete(struct usb_ep *ep, struct usb_request *req) switch(req->status) { case 0: - /* normal completion */ + /* normal completion */ gs_recv_packet(dev, req->buf, req->actual); requeue: req->length = ep->maxpacket; @@ -1406,23 +1388,24 @@ static int __init gs_bind(struct usb_gadget *gadget) ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC; gs_device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; -#ifdef CONFIG_USB_GADGET_DUALSPEED - gs_qualifier_desc.bDeviceClass = use_acm - ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC; - /* assume ep0 uses the same packet size for both speeds */ - gs_qualifier_desc.bMaxPacketSize0 = gs_device_desc.bMaxPacketSize0; - /* assume endpoints are dual-speed */ - gs_highspeed_notify_desc.bEndpointAddress = - gs_fullspeed_notify_desc.bEndpointAddress; - gs_highspeed_in_desc.bEndpointAddress = - gs_fullspeed_in_desc.bEndpointAddress; - gs_highspeed_out_desc.bEndpointAddress = - gs_fullspeed_out_desc.bEndpointAddress; -#endif /* CONFIG_USB_GADGET_DUALSPEED */ + if (gadget_is_dualspeed(gadget)) { + gs_qualifier_desc.bDeviceClass = use_acm + ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC; + /* assume ep0 uses the same packet size for both speeds */ + gs_qualifier_desc.bMaxPacketSize0 = + gs_device_desc.bMaxPacketSize0; + /* assume endpoints are dual-speed */ + gs_highspeed_notify_desc.bEndpointAddress = + gs_fullspeed_notify_desc.bEndpointAddress; + gs_highspeed_in_desc.bEndpointAddress = + gs_fullspeed_in_desc.bEndpointAddress; + gs_highspeed_out_desc.bEndpointAddress = + gs_fullspeed_out_desc.bEndpointAddress; + } usb_gadget_set_selfpowered(gadget); - if (gadget->is_otg) { + if (gadget_is_otg(gadget)) { gs_otg_descriptor.bmAttributes |= USB_OTG_HNP, gs_bulk_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; gs_acm_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; @@ -1570,9 +1553,8 @@ static int gs_setup_standard(struct usb_gadget *gadget, memcpy(req->buf, &gs_device_desc, ret); break; -#ifdef CONFIG_USB_GADGET_DUALSPEED case USB_DT_DEVICE_QUALIFIER: - if (!gadget->is_dualspeed) + if (!gadget_is_dualspeed(gadget)) break; ret = min(wLength, (u16)sizeof(struct usb_qualifier_descriptor)); @@ -1580,14 +1562,13 @@ static int gs_setup_standard(struct usb_gadget *gadget, break; case USB_DT_OTHER_SPEED_CONFIG: - if (!gadget->is_dualspeed) + if (!gadget_is_dualspeed(gadget)) break; /* fall through */ -#endif /* CONFIG_USB_GADGET_DUALSPEED */ case USB_DT_CONFIG: - ret = gs_build_config_buf(req->buf, gadget->speed, + ret = gs_build_config_buf(req->buf, gadget, wValue >> 8, wValue & 0xff, - gadget->is_otg); + gadget_is_otg(gadget)); if (ret >= 0) ret = min(wLength, (u16)ret); break; @@ -1827,8 +1808,7 @@ static int gs_set_config(struct gs_dev *dev, unsigned config) if (EP_NOTIFY_NAME && strcmp(ep->name, EP_NOTIFY_NAME) == 0) { - ep_desc = GS_SPEED_SELECT( - gadget->speed == USB_SPEED_HIGH, + ep_desc = choose_ep_desc(gadget, &gs_highspeed_notify_desc, &gs_fullspeed_notify_desc); ret = usb_ep_enable(ep,ep_desc); @@ -1844,9 +1824,8 @@ static int gs_set_config(struct gs_dev *dev, unsigned config) } else if (strcmp(ep->name, EP_IN_NAME) == 0) { - ep_desc = GS_SPEED_SELECT( - gadget->speed == USB_SPEED_HIGH, - &gs_highspeed_in_desc, + ep_desc = choose_ep_desc(gadget, + &gs_highspeed_in_desc, &gs_fullspeed_in_desc); ret = usb_ep_enable(ep,ep_desc); if (ret == 0) { @@ -1861,8 +1840,7 @@ static int gs_set_config(struct gs_dev *dev, unsigned config) } else if (strcmp(ep->name, EP_OUT_NAME) == 0) { - ep_desc = GS_SPEED_SELECT( - gadget->speed == USB_SPEED_HIGH, + ep_desc = choose_ep_desc(gadget, &gs_highspeed_out_desc, &gs_fullspeed_out_desc); ret = usb_ep_enable(ep,ep_desc); @@ -1981,11 +1959,11 @@ static void gs_reset_config(struct gs_dev *dev) * Builds the config descriptors in the given buffer and returns the * length, or a negative error number. */ -static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed, +static int gs_build_config_buf(u8 *buf, struct usb_gadget *g, u8 type, unsigned int index, int is_otg) { int len; - int high_speed; + int high_speed = 0; const struct usb_config_descriptor *config_desc; const struct usb_descriptor_header **function; @@ -1993,20 +1971,22 @@ static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed, return -EINVAL; /* other speed switches high and full speed */ - high_speed = (speed == USB_SPEED_HIGH); - if (type == USB_DT_OTHER_SPEED_CONFIG) - high_speed = !high_speed; + if (gadget_is_dualspeed(g)) { + high_speed = (g->speed == USB_SPEED_HIGH); + if (type == USB_DT_OTHER_SPEED_CONFIG) + high_speed = !high_speed; + } if (use_acm) { config_desc = &gs_acm_config_desc; - function = GS_SPEED_SELECT(high_speed, - gs_acm_highspeed_function, - gs_acm_fullspeed_function); + function = high_speed + ? gs_acm_highspeed_function + : gs_acm_fullspeed_function; } else { config_desc = &gs_bulk_config_desc; - function = GS_SPEED_SELECT(high_speed, - gs_bulk_highspeed_function, - gs_bulk_fullspeed_function); + function = high_speed + ? gs_bulk_highspeed_function + : gs_bulk_fullspeed_function; } /* for now, don't advertise srp-only devices */ -- 1.5.3.4 ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel