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Date: Fri, 11 Dec 2015 12:25:09 +0100
From: Robert Baldyga <r.baldyga@...sung.com>
To: balbi@...com
Cc: gregkh@...uxfoundation.org, andrzej.p@...sung.com,
m.szyprowski@...sung.com, b.zolnierkie@...sung.com,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH v3 30/36] usb: gadget: f_serial: conversion to new API
Generate descriptors in new format and attach them to USB function in
prep_descs(). Change set_alt() implementation and implement clear_alt()
operation. Remove boilerplate code.
Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
---
drivers/usb/gadget/function/f_serial.c | 122 +++++++--------------------------
1 file changed, 25 insertions(+), 97 deletions(-)
diff --git a/drivers/usb/gadget/function/f_serial.c b/drivers/usb/gadget/function/f_serial.c
index 6bb44d61..526e664 100644
--- a/drivers/usb/gadget/function/f_serial.c
+++ b/drivers/usb/gadget/function/f_serial.c
@@ -69,13 +69,6 @@ static struct usb_endpoint_descriptor gser_fs_out_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
-static struct usb_descriptor_header *gser_fs_function[] = {
- (struct usb_descriptor_header *) &gser_interface_desc,
- (struct usb_descriptor_header *) &gser_fs_in_desc,
- (struct usb_descriptor_header *) &gser_fs_out_desc,
- NULL,
-};
-
/* high speed support: */
static struct usb_endpoint_descriptor gser_hs_in_desc = {
@@ -92,13 +85,6 @@ static struct usb_endpoint_descriptor gser_hs_out_desc = {
.wMaxPacketSize = cpu_to_le16(512),
};
-static struct usb_descriptor_header *gser_hs_function[] = {
- (struct usb_descriptor_header *) &gser_interface_desc,
- (struct usb_descriptor_header *) &gser_hs_in_desc,
- (struct usb_descriptor_header *) &gser_hs_out_desc,
- NULL,
-};
-
static struct usb_endpoint_descriptor gser_ss_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -118,14 +104,16 @@ static struct usb_ss_ep_comp_descriptor gser_ss_bulk_comp_desc = {
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
};
-static struct usb_descriptor_header *gser_ss_function[] = {
- (struct usb_descriptor_header *) &gser_interface_desc,
- (struct usb_descriptor_header *) &gser_ss_in_desc,
- (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &gser_ss_out_desc,
- (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
- NULL,
-};
+USB_COMPOSITE_ENDPOINT(ep_in, &gser_fs_in_desc, &gser_hs_in_desc,
+ &gser_ss_in_desc, &gser_ss_bulk_comp_desc);
+USB_COMPOSITE_ENDPOINT(ep_out, &gser_fs_out_desc, &gser_hs_out_desc,
+ &gser_ss_out_desc, &gser_ss_bulk_comp_desc);
+
+USB_COMPOSITE_ALTSETTING(intf0alt0, &gser_interface_desc, &ep_in, &ep_out);
+
+USB_COMPOSITE_INTERFACE(intf0, &intf0alt0);
+
+USB_COMPOSITE_DESCRIPTORS(serial_descs, &intf0);
/* string descriptors: */
@@ -151,28 +139,21 @@ static int gser_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
struct f_gser *gser = func_to_gser(f);
struct usb_composite_dev *cdev = f->config->cdev;
- /* we know alt == 0, so this is an activation or a reset */
-
- if (gser->port.in->enabled) {
- dev_dbg(&cdev->gadget->dev,
- "reset generic ttyGS%d\n", gser->port_num);
- gserial_disconnect(&gser->port);
- }
- if (!gser->port.in->desc || !gser->port.out->desc) {
- dev_dbg(&cdev->gadget->dev,
+ dev_dbg(&cdev->gadget->dev,
"activate generic ttyGS%d\n", gser->port_num);
- if (config_ep_by_speed(cdev->gadget, f, gser->port.in) ||
- config_ep_by_speed(cdev->gadget, f, gser->port.out)) {
- gser->port.in->desc = NULL;
- gser->port.out->desc = NULL;
- return -EINVAL;
- }
- }
+
+ gser->port.in = usb_function_get_ep(f, intf, 0);
+ if (!gser->port.in)
+ return -ENODEV;
+ gser->port.out = usb_function_get_ep(f, intf, 0);
+ if (!gser->port.out)
+ return -ENODEV;
+
gserial_connect(&gser->port, gser->port_num);
return 0;
}
-static void gser_disable(struct usb_function *f)
+static void gser_clear_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_gser *gser = func_to_gser(f);
struct usb_composite_dev *cdev = f->config->cdev;
@@ -186,12 +167,9 @@ static void gser_disable(struct usb_function *f)
/* serial function driver setup/binding */
-static int gser_bind(struct usb_configuration *c, struct usb_function *f)
+static int gser_prep_descs(struct usb_function *f)
{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_gser *gser = func_to_gser(f);
int status;
- struct usb_ep *ep;
/* REVISIT might want instance-specific strings to help
* distinguish instances ...
@@ -199,57 +177,13 @@ static int gser_bind(struct usb_configuration *c, struct usb_function *f)
/* maybe allocate device-global string ID */
if (gser_string_defs[0].id == 0) {
- status = usb_string_id(c->cdev);
+ status = usb_string_id(f->config->cdev);
if (status < 0)
return status;
gser_string_defs[0].id = status;
}
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- gser->data_id = status;
- gser_interface_desc.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &gser_fs_in_desc);
- if (!ep)
- goto fail;
- gser->port.in = ep;
-
- ep = usb_ep_autoconfig(cdev->gadget, &gser_fs_out_desc);
- if (!ep)
- goto fail;
- gser->port.out = ep;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- gser_hs_in_desc.bEndpointAddress = gser_fs_in_desc.bEndpointAddress;
- gser_hs_out_desc.bEndpointAddress = gser_fs_out_desc.bEndpointAddress;
-
- gser_ss_in_desc.bEndpointAddress = gser_fs_in_desc.bEndpointAddress;
- gser_ss_out_desc.bEndpointAddress = gser_fs_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, gser_fs_function, gser_hs_function,
- gser_ss_function);
- if (status)
- goto fail;
- dev_dbg(&cdev->gadget->dev, "generic ttyGS%d: %s speed IN/%s OUT/%s\n",
- gser->port_num,
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- gser->port.in->name, gser->port.out->name);
- return 0;
-
-fail:
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
+ return usb_function_set_descs(f, &serial_descs);
}
static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
@@ -325,11 +259,6 @@ static void gser_free(struct usb_function *f)
kfree(serial);
}
-static void gser_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- usb_free_all_descriptors(f);
-}
-
static struct usb_function *gser_alloc(struct usb_function_instance *fi)
{
struct f_gser *gser;
@@ -346,10 +275,9 @@ static struct usb_function *gser_alloc(struct usb_function_instance *fi)
gser->port.func.name = "gser";
gser->port.func.strings = gser_strings;
- gser->port.func.bind = gser_bind;
- gser->port.func.unbind = gser_unbind;
+ gser->port.func.prep_descs = gser_prep_descs;
gser->port.func.set_alt = gser_set_alt;
- gser->port.func.disable = gser_disable;
+ gser->port.func.clear_alt = gser_clear_alt;
gser->port.func.free_func = gser_free;
return &gser->port.func;
--
1.9.1
--
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