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Subject[PATCH 17/46] usb gadget: link fixes for gadget zero
Date
From: David Brownell <dbrownell@users.sourceforge.net>

Change how the Gadget Zero driver builds: don't use
separate compilation, since it works poorly when key
parts are library code (with init sections etc).
Instead be as close as we can to "gcc --combine ...".

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/gadget/Makefile | 2 +-
drivers/usb/gadget/f_loopback.c | 34 ++++++++++++++++++----------------
drivers/usb/gadget/zero.c | 17 +++++++++++++++++
3 files changed, 36 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 853dd02..55f5891 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -24,7 +24,7 @@ obj-$(CONFIG_USB_M66592) += m66592-udc.o
#
C_UTILS = composite.o usbstring.o config.o epautoconf.o

-g_zero-objs := zero.o f_sourcesink.o f_loopback.o $(C_UTILS)
+g_zero-objs := zero.o
g_ether-objs := ether.o u_ether.o f_subset.o f_ecm.o $(C_UTILS)
g_serial-objs := serial.o
g_midi-objs := gmidi.o usbstring.o config.o epautoconf.o
diff --git a/drivers/usb/gadget/f_loopback.c b/drivers/usb/gadget/f_loopback.c
index eda4cde..87dde01 100644
--- a/drivers/usb/gadget/f_loopback.c
+++ b/drivers/usb/gadget/f_loopback.c
@@ -70,7 +70,7 @@ static struct usb_interface_descriptor loopback_intf = {

/* full speed support: */

-static struct usb_endpoint_descriptor fs_source_desc = {
+static struct usb_endpoint_descriptor fs_loop_source_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,

@@ -78,7 +78,7 @@ static struct usb_endpoint_descriptor fs_source_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};

-static struct usb_endpoint_descriptor fs_sink_desc = {
+static struct usb_endpoint_descriptor fs_loop_sink_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,

@@ -88,14 +88,14 @@ static struct usb_endpoint_descriptor fs_sink_desc = {

static struct usb_descriptor_header *fs_loopback_descs[] = {
(struct usb_descriptor_header *) &loopback_intf,
- (struct usb_descriptor_header *) &fs_sink_desc,
- (struct usb_descriptor_header *) &fs_source_desc,
+ (struct usb_descriptor_header *) &fs_loop_sink_desc,
+ (struct usb_descriptor_header *) &fs_loop_source_desc,
NULL,
};

/* high speed support: */

-static struct usb_endpoint_descriptor hs_source_desc = {
+static struct usb_endpoint_descriptor hs_loop_source_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,

@@ -103,7 +103,7 @@ static struct usb_endpoint_descriptor hs_source_desc = {
.wMaxPacketSize = __constant_cpu_to_le16(512),
};

-static struct usb_endpoint_descriptor hs_sink_desc = {
+static struct usb_endpoint_descriptor hs_loop_sink_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,

@@ -113,8 +113,8 @@ static struct usb_endpoint_descriptor hs_sink_desc = {

static struct usb_descriptor_header *hs_loopback_descs[] = {
(struct usb_descriptor_header *) &loopback_intf,
- (struct usb_descriptor_header *) &hs_source_desc,
- (struct usb_descriptor_header *) &hs_sink_desc,
+ (struct usb_descriptor_header *) &hs_loop_source_desc,
+ (struct usb_descriptor_header *) &hs_loop_sink_desc,
NULL,
};

@@ -152,7 +152,7 @@ loopback_bind(struct usb_configuration *c, struct usb_function *f)

/* allocate endpoints */

- loop->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
+ loop->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_source_desc);
if (!loop->in_ep) {
autoconf_fail:
ERROR(cdev, "%s: can't autoconfigure on %s\n",
@@ -161,17 +161,17 @@ autoconf_fail:
}
loop->in_ep->driver_data = cdev; /* claim */

- loop->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
+ loop->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_sink_desc);
if (!loop->out_ep)
goto autoconf_fail;
loop->out_ep->driver_data = cdev; /* claim */

/* support high speed hardware */
if (gadget_is_dualspeed(c->cdev->gadget)) {
- hs_source_desc.bEndpointAddress =
- fs_source_desc.bEndpointAddress;
- hs_sink_desc.bEndpointAddress =
- fs_sink_desc.bEndpointAddress;
+ hs_loop_source_desc.bEndpointAddress =
+ fs_loop_source_desc.bEndpointAddress;
+ hs_loop_sink_desc.bEndpointAddress =
+ fs_loop_sink_desc.bEndpointAddress;
f->hs_descriptors = hs_loopback_descs;
}

@@ -255,8 +255,10 @@ enable_loopback(struct usb_composite_dev *cdev, struct f_loopback *loop)
struct usb_request *req;
unsigned i;

- src = ep_choose(cdev->gadget, &hs_source_desc, &fs_source_desc);
- sink = ep_choose(cdev->gadget, &hs_sink_desc, &fs_sink_desc);
+ src = ep_choose(cdev->gadget,
+ &hs_loop_source_desc, &fs_loop_source_desc);
+ sink = ep_choose(cdev->gadget,
+ &hs_loop_sink_desc, &fs_loop_sink_desc);

/* one endpoint writes data back IN to the host */
ep = loop->in_ep;
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index aa0bd4f..361d965 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -59,6 +59,23 @@

/*-------------------------------------------------------------------------*/

+/*
+ * Kbuild is not very cooperative with respect to linking separately
+ * compiled library objects into one module. So for now we won't use
+ * separate compilation ... ensuring init/exit sections work to shrink
+ * the runtime footprint, and giving us at least some parts of what
+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ */
+#include "composite.c"
+#include "usbstring.c"
+#include "config.c"
+#include "epautoconf.c"
+
+#include "f_sourcesink.c"
+#include "f_loopback.c"
+
+/*-------------------------------------------------------------------------*/
+
#define DRIVER_VERSION "Cinco de Mayo 2008"

static const char longname[] = "Gadget Zero";
--
1.6.0.2


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