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Date: Fri, 11 Dec 2015 12:25:05 +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 26/36] usb: gadget: f_acm: conversion to new API
Generate descriptors in new format and attach them to USB function in
prep_descs(). Implement prep_vendor_descs() to supply class specific
descriptors. 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_acm.c | 248 ++++++++++++------------------------
1 file changed, 78 insertions(+), 170 deletions(-)
diff --git a/drivers/usb/gadget/function/f_acm.c b/drivers/usb/gadget/function/f_acm.c
index 2fa1e80..0d3fe1a 100644
--- a/drivers/usb/gadget/function/f_acm.c
+++ b/drivers/usb/gadget/function/f_acm.c
@@ -185,20 +185,6 @@ static struct usb_endpoint_descriptor acm_fs_out_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
-static struct usb_descriptor_header *acm_fs_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_fs_notify_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_fs_in_desc,
- (struct usb_descriptor_header *) &acm_fs_out_desc,
- NULL,
-};
-
/* high speed support: */
static struct usb_endpoint_descriptor acm_hs_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
@@ -223,20 +209,6 @@ static struct usb_endpoint_descriptor acm_hs_out_desc = {
.wMaxPacketSize = cpu_to_le16(512),
};
-static struct usb_descriptor_header *acm_hs_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_hs_notify_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_hs_in_desc,
- (struct usb_descriptor_header *) &acm_hs_out_desc,
- NULL,
-};
-
static struct usb_endpoint_descriptor acm_ss_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -256,22 +228,20 @@ static struct usb_ss_ep_comp_descriptor acm_ss_bulk_comp_desc = {
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
};
-static struct usb_descriptor_header *acm_ss_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_hs_notify_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_ss_in_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &acm_ss_out_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- NULL,
-};
+USB_COMPOSITE_ENDPOINT(ep_notify, &acm_fs_notify_desc, &acm_hs_notify_desc,
+ &acm_hs_notify_desc, &acm_ss_bulk_comp_desc);
+USB_COMPOSITE_ENDPOINT(ep_in, &acm_fs_in_desc, &acm_hs_in_desc,
+ &acm_ss_in_desc, &acm_ss_bulk_comp_desc);
+USB_COMPOSITE_ENDPOINT(ep_out, &acm_fs_out_desc, &acm_hs_out_desc,
+ &acm_ss_out_desc, &acm_ss_bulk_comp_desc);
+
+USB_COMPOSITE_ALTSETTING(intf0alt0, &acm_control_interface_desc, &ep_notify);
+USB_COMPOSITE_ALTSETTING(intf1alt0, &acm_data_interface_desc, &ep_in, &ep_out);
+
+USB_COMPOSITE_INTERFACE(intf0, &intf0alt0);
+USB_COMPOSITE_INTERFACE(intf1, &intf1alt0);
+
+USB_COMPOSITE_DESCRIPTORS(acm_descs, &intf0, &intf1);
/* string descriptors: */
@@ -420,6 +390,8 @@ invalid:
return value;
}
+static void acm_cdc_notify_complete(struct usb_ep *ep, struct usb_request *req);
+
static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_acm *acm = func_to_acm(f);
@@ -427,51 +399,49 @@ static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
/* we know alt == 0, so this is an activation or a reset */
- if (intf == acm->ctrl_id) {
+ if (intf == 0) {
dev_vdbg(&cdev->gadget->dev,
"reset acm control interface %d\n", intf);
- usb_ep_disable(acm->notify);
-
- if (!acm->notify->desc)
- if (config_ep_by_speed(cdev->gadget, f, acm->notify))
- return -EINVAL;
-
- usb_ep_enable(acm->notify);
-
- } else if (intf == acm->data_id) {
- if (acm->notify->enabled) {
- dev_dbg(&cdev->gadget->dev,
- "reset acm ttyGS%d\n", acm->port_num);
- gserial_disconnect(&acm->port);
- }
- if (!acm->port.in->desc || !acm->port.out->desc) {
- dev_dbg(&cdev->gadget->dev,
+
+ acm->notify = usb_function_get_ep(f, intf, 0);
+ if (!acm->notify)
+ return -ENODEV;
+
+ /* allocate notification */
+ acm->notify_req = gs_alloc_req(acm->notify,
+ sizeof(struct usb_cdc_notification) + 2,
+ GFP_KERNEL);
+ if (!acm->notify_req)
+ return -ENOMEM;
+
+ acm->notify_req->complete = acm_cdc_notify_complete;
+ acm->notify_req->context = acm;
+ } else if (intf == 1) {
+ dev_dbg(&cdev->gadget->dev,
"activate acm ttyGS%d\n", acm->port_num);
- if (config_ep_by_speed(cdev->gadget, f,
- acm->port.in) ||
- config_ep_by_speed(cdev->gadget, f,
- acm->port.out)) {
- acm->port.in->desc = NULL;
- acm->port.out->desc = NULL;
- return -EINVAL;
- }
- }
- gserial_connect(&acm->port, acm->port_num);
- } else
- return -EINVAL;
+ acm->port.in = usb_function_get_ep(f, intf, 0);
+ if (!acm->port.in)
+ return -ENODEV;
+ acm->port.out = usb_function_get_ep(f, intf, 1);
+ if (!acm->port.out)
+ return -ENODEV;
+
+ gserial_connect(&acm->port, acm->port_num);
+ }
return 0;
}
-static void acm_disable(struct usb_function *f)
+static void acm_clear_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_acm *acm = func_to_acm(f);
struct usb_composite_dev *cdev = f->config->cdev;
dev_dbg(&cdev->gadget->dev, "acm ttyGS%d deactivated\n", acm->port_num);
gserial_disconnect(&acm->port);
- usb_ep_disable(acm->notify);
+
+ gs_free_req(acm->notify, acm->notify_req);
}
/*-------------------------------------------------------------------------*/
@@ -602,15 +572,10 @@ static int acm_send_break(struct gserial *port, int duration)
/*-------------------------------------------------------------------------*/
-/* ACM function driver setup/binding */
-static int
-acm_bind(struct usb_configuration *c, struct usb_function *f)
+static int acm_prep_descs(struct usb_function *f)
{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_acm *acm = func_to_acm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
struct usb_string *us;
- int status;
- struct usb_ep *ep;
/* REVISIT might want instance-specific strings to help
* distinguish instances ...
@@ -625,96 +590,39 @@ acm_bind(struct usb_configuration *c, struct usb_function *f)
acm_data_interface_desc.iInterface = us[ACM_DATA_IDX].id;
acm_iad_descriptor.iFunction = us[ACM_IAD_IDX].id;
- /* allocate instance-specific interface IDs, and patch descriptors */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- acm->ctrl_id = status;
- acm_iad_descriptor.bFirstInterface = status;
-
- acm_control_interface_desc.bInterfaceNumber = status;
- acm_union_desc .bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- acm->data_id = status;
-
- acm_data_interface_desc.bInterfaceNumber = status;
- acm_union_desc.bSlaveInterface0 = status;
- acm_call_mgmt_descriptor.bDataInterface = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_in_desc);
- if (!ep)
- goto fail;
- acm->port.in = ep;
-
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_out_desc);
- if (!ep)
- goto fail;
- acm->port.out = ep;
-
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_notify_desc);
- if (!ep)
- goto fail;
- acm->notify = ep;
-
- /* allocate notification */
- acm->notify_req = gs_alloc_req(ep,
- sizeof(struct usb_cdc_notification) + 2,
- GFP_KERNEL);
- if (!acm->notify_req)
- goto fail;
-
- acm->notify_req->complete = acm_cdc_notify_complete;
- acm->notify_req->context = acm;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- acm_hs_in_desc.bEndpointAddress = acm_fs_in_desc.bEndpointAddress;
- acm_hs_out_desc.bEndpointAddress = acm_fs_out_desc.bEndpointAddress;
- acm_hs_notify_desc.bEndpointAddress =
- acm_fs_notify_desc.bEndpointAddress;
-
- acm_ss_in_desc.bEndpointAddress = acm_fs_in_desc.bEndpointAddress;
- acm_ss_out_desc.bEndpointAddress = acm_fs_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, acm_fs_function, acm_hs_function,
- acm_ss_function);
- if (status)
- goto fail;
-
- dev_dbg(&cdev->gadget->dev,
- "acm ttyGS%d: %s speed IN/%s OUT/%s NOTIFY/%s\n",
- acm->port_num,
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- acm->port.in->name, acm->port.out->name,
- acm->notify->name);
- return 0;
-
-fail:
- if (acm->notify_req)
- gs_free_req(acm->notify, acm->notify_req);
-
- ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);
-
- return status;
+ return usb_function_set_descs(f, &acm_descs);
}
-static void acm_unbind(struct usb_configuration *c, struct usb_function *f)
+static int acm_prep_vendor_descs(struct usb_function *f)
{
struct f_acm *acm = func_to_acm(f);
+ int intf0_id, intf1_id;
+
+ intf0_id = usb_get_interface_id(f, 0);
+ intf1_id = usb_get_interface_id(f, 1);
+
+ acm->ctrl_id = intf0_id;
+ acm->data_id = intf1_id;
+
+ acm_iad_descriptor.bFirstInterface = intf0_id;
- acm_string_defs[0].id = 0;
- usb_free_all_descriptors(f);
- if (acm->notify_req)
- gs_free_req(acm->notify, acm->notify_req);
+ acm_call_mgmt_descriptor.bDataInterface = intf1_id;
+ acm_union_desc.bMasterInterface0 = intf0_id;
+ acm_union_desc.bSlaveInterface0 = intf1_id;
+
+ usb_function_add_vendor_desc(f,
+ (struct usb_descriptor_header *)&acm_iad_descriptor);
+
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&acm_header_desc);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *) &acm_call_mgmt_descriptor);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&acm_descriptor);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&acm_union_desc);
+
+ return 0;
}
static void acm_free_func(struct usb_function *f)
@@ -742,14 +650,14 @@ static struct usb_function *acm_alloc_func(struct usb_function_instance *fi)
acm->port.func.name = "acm";
acm->port.func.strings = acm_strings;
/* descriptors are per-instance copies */
- acm->port.func.bind = acm_bind;
+ acm->port.func.prep_descs = acm_prep_descs;
+ acm->port.func.prep_vendor_descs = acm_prep_vendor_descs;
acm->port.func.set_alt = acm_set_alt;
+ acm->port.func.clear_alt = acm_clear_alt;
acm->port.func.setup = acm_setup;
- acm->port.func.disable = acm_disable;
opts = container_of(fi, struct f_serial_opts, func_inst);
acm->port_num = opts->port_num;
- acm->port.func.unbind = acm_unbind;
acm->port.func.free_func = acm_free_func;
return &acm->port.func;
--
1.9.1
--
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