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USB: gadget: ethernet gadget cleanups, shrinkage
Clean up the ethernet gadget, using newer APIs and conventions: - gadget_is_dualspeed() and gadget_is_otg() ... #ifdef removal - Remove many now-needless #includes - Use the VERBOSE_DEBUG convention - Minor whitespace fixes. - Fix a warning from "sparse". Surprisingly, this saved about 2K of code (16%) on a fullspeed-only ARMv4 platform. I'm bit puzzled by that (it's so much!), but approve of the result. 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
Greg Kroah-Hartman
parent
a4e3ef5597
commit
0cf4f2de0a
@ -19,41 +19,19 @@
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* #define VERBOSE_DEBUG */
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// #define DEBUG 1
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// #define VERBOSE
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/timer.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/utsname.h>
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#include <linux/device.h>
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#include <linux/moduleparam.h>
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#include <linux/ctype.h>
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#include <asm/byteorder.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/unaligned.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb_gadget.h>
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#include <linux/random.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include "gadget_chips.h"
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/*-------------------------------------------------------------------------*/
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@ -356,15 +334,15 @@ module_param (qmult, uint, S_IRUGO|S_IWUSR);
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#define qlen(gadget) \
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(DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
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/* also defer IRQs on highspeed TX */
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#define TX_DELAY qmult
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static inline int BITRATE(struct usb_gadget *g)
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{
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return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
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}
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#else /* full speed (low speed doesn't do bulk) */
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#define qmult 1
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#define DEVSPEED USB_SPEED_FULL
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#define qlen(gadget) DEFAULT_QLEN
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@ -390,7 +368,7 @@ static inline int BITRATE(struct usb_gadget *g)
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do { } while (0)
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#endif /* DEBUG */
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#ifdef VERBOSE
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#ifdef VERBOSE_DEBUG
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#define VDEBUG DEBUG
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#else
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#define VDEBUG(dev,fmt,args...) \
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@ -830,8 +808,6 @@ static const struct usb_descriptor_header *fs_rndis_function [] = {
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};
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#endif
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#ifdef CONFIG_USB_GADGET_DUALSPEED
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/*
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* usb 2.0 devices need to expose both high speed and full speed
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* descriptors, unless they only run at full speed.
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@ -934,18 +910,15 @@ static const struct usb_descriptor_header *hs_rndis_function [] = {
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/* maxpacket and other transfer characteristics vary by speed. */
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#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
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#else
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/* if there's no high speed support, maxpacket doesn't change. */
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#define ep_desc(g,hs,fs) (((void)(g)), (fs))
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static inline void __init hs_subset_descriptors(void)
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static inline struct usb_endpoint_descriptor *
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ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
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struct usb_endpoint_descriptor *fs)
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{
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if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
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return hs;
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return fs;
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}
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#endif /* !CONFIG_USB_GADGET_DUALSPEED */
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/*-------------------------------------------------------------------------*/
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@ -989,22 +962,19 @@ static struct usb_gadget_strings stringtab = {
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* complications: class descriptors, and an altsetting.
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*/
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static int
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config_buf (enum usb_device_speed speed,
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u8 *buf, u8 type,
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unsigned index, int is_otg)
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config_buf(struct usb_gadget *g, u8 *buf, u8 type, unsigned index, int is_otg)
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{
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int len;
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const struct usb_config_descriptor *config;
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const struct usb_descriptor_header **function;
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#ifdef CONFIG_USB_GADGET_DUALSPEED
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int hs = (speed == USB_SPEED_HIGH);
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int hs = 0;
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if (type == USB_DT_OTHER_SPEED_CONFIG)
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hs = !hs;
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if (gadget_is_dualspeed(g)) {
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hs = (g->speed == USB_SPEED_HIGH);
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if (type == USB_DT_OTHER_SPEED_CONFIG)
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hs = !hs;
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}
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#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
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#else
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#define which_fn(t) (fs_ ## t ## _function)
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#endif
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if (index >= device_desc.bNumConfigurations)
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return -EINVAL;
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@ -1217,7 +1187,7 @@ eth_set_config (struct eth_dev *dev, unsigned number, gfp_t gfp_flags)
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if (number)
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eth_reset_config (dev);
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usb_gadget_vbus_draw(dev->gadget,
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dev->gadget->is_otg ? 8 : 100);
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gadget_is_otg(dev->gadget) ? 8 : 100);
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} else {
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char *speed;
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unsigned power;
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@ -1399,24 +1369,22 @@ eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
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value = min (wLength, (u16) sizeof device_desc);
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memcpy (req->buf, &device_desc, value);
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break;
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#ifdef CONFIG_USB_GADGET_DUALSPEED
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case USB_DT_DEVICE_QUALIFIER:
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if (!gadget->is_dualspeed)
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if (!gadget_is_dualspeed(gadget))
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break;
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value = min (wLength, (u16) sizeof dev_qualifier);
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memcpy (req->buf, &dev_qualifier, value);
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break;
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case USB_DT_OTHER_SPEED_CONFIG:
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if (!gadget->is_dualspeed)
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if (!gadget_is_dualspeed(gadget))
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break;
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// FALLTHROUGH
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#endif /* CONFIG_USB_GADGET_DUALSPEED */
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case USB_DT_CONFIG:
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value = config_buf (gadget->speed, req->buf,
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value = config_buf(gadget, req->buf,
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wValue >> 8,
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wValue & 0xff,
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gadget->is_otg);
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gadget_is_otg(gadget));
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if (value >= 0)
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value = min (wLength, (u16) value);
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break;
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@ -1585,12 +1553,12 @@ done_set_intf:
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&& rndis_control_intf.bInterfaceNumber
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== wIndex) {
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u8 *buf;
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u32 n;
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/* return the result */
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buf = rndis_get_next_response (dev->rndis_config,
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&value);
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buf = rndis_get_next_response(dev->rndis_config, &n);
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if (buf) {
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memcpy (req->buf, buf, value);
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memcpy(req->buf, buf, n);
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req->complete = rndis_response_complete;
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rndis_free_response(dev->rndis_config, buf);
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}
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@ -2026,12 +1994,11 @@ static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
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req->length = length;
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#ifdef CONFIG_USB_GADGET_DUALSPEED
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/* throttle highspeed IRQ rate back slightly */
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req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
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? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0)
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: 0;
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#endif
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if (gadget_is_dualspeed(dev->gadget))
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req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
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? ((atomic_read(&dev->tx_qlen) % qmult) != 0)
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: 0;
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retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
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switch (retval) {
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@ -2188,8 +2155,7 @@ static int eth_stop (struct net_device *net)
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}
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if (rndis_active(dev)) {
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rndis_set_param_medium (dev->rndis_config,
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NDIS_MEDIUM_802_3, 0);
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rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0);
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(void) rndis_signal_disconnect (dev->rndis_config);
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}
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@ -2443,26 +2409,28 @@ autoconf_fail:
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if (rndis)
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device_desc.bNumConfigurations = 2;
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#ifdef CONFIG_USB_GADGET_DUALSPEED
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if (rndis)
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dev_qualifier.bNumConfigurations = 2;
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else if (!cdc)
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dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
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if (gadget_is_dualspeed(gadget)) {
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if (rndis)
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dev_qualifier.bNumConfigurations = 2;
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else if (!cdc)
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dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
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/* assumes ep0 uses the same value for both speeds ... */
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dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
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/* assumes ep0 uses the same value for both speeds ... */
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dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
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/* and that all endpoints are dual-speed */
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hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
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hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
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/* and that all endpoints are dual-speed */
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hs_source_desc.bEndpointAddress =
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fs_source_desc.bEndpointAddress;
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hs_sink_desc.bEndpointAddress =
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fs_sink_desc.bEndpointAddress;
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#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
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if (status_ep)
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hs_status_desc.bEndpointAddress =
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fs_status_desc.bEndpointAddress;
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if (status_ep)
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hs_status_desc.bEndpointAddress =
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fs_status_desc.bEndpointAddress;
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#endif
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#endif /* DUALSPEED */
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}
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if (gadget->is_otg) {
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if (gadget_is_otg(gadget)) {
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otg_descriptor.bmAttributes |= USB_OTG_HNP,
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eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
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eth_config.bMaxPower = 4;
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@ -2598,12 +2566,11 @@ fail0:
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if (rndis_set_param_dev (dev->rndis_config, dev->net,
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&dev->stats, &dev->cdc_filter))
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goto fail0;
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if (rndis_set_param_vendor (dev->rndis_config, vendorID,
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manufacturer))
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if (rndis_set_param_vendor(dev->rndis_config, vendorID,
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manufacturer))
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goto fail0;
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if (rndis_set_param_medium (dev->rndis_config,
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NDIS_MEDIUM_802_3,
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0))
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if (rndis_set_param_medium(dev->rndis_config,
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NDIS_MEDIUM_802_3, 0))
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goto fail0;
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INFO (dev, "RNDIS ready\n");
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}
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