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usb: gadget: aspeed: support per-vhub usb descriptors

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This patch store vhub's standard usb descriptors in struct "ast_vhub" so
it's more convenient to customize descriptors and potentially support
multiple vhub instances in the future.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Tao Ren 2020-03-02 22:23:30 -08:00 committed by Felipe Balbi
parent eaea6efe1d
commit 6dbf05fcb6
2 changed files with 46 additions and 12 deletions
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43
drivers/usb/gadget/udc/aspeed-vhub/hub.c
View File

@ -93,11 +93,7 @@ static void ast_vhub_patch_dev_desc_usb1(struct usb_device_descriptor *desc)
USB_DT_INTERFACE_SIZE + \
USB_DT_ENDPOINT_SIZE)
static const struct ast_vhub_full_cdesc {
struct usb_config_descriptor cfg;
struct usb_interface_descriptor intf;
struct usb_endpoint_descriptor ep;
} __attribute__ ((packed)) ast_vhub_conf_desc = {
static const struct ast_vhub_full_cdesc ast_vhub_conf_desc = {
.cfg = {
.bLength = USB_DT_CONFIG_SIZE,
.bDescriptorType = USB_DT_CONFIG,
@ -266,6 +262,7 @@ static int ast_vhub_rep_desc(struct ast_vhub_ep *ep,
u8 desc_type, u16 len)
{
size_t dsize;
struct ast_vhub *vhub = ep->vhub;
EPDBG(ep, "GET_DESCRIPTOR(type:%d)\n", desc_type);
@ -281,20 +278,20 @@ static int ast_vhub_rep_desc(struct ast_vhub_ep *ep,
switch(desc_type) {
case USB_DT_DEVICE:
dsize = USB_DT_DEVICE_SIZE;
memcpy(ep->buf, &ast_vhub_dev_desc, dsize);
BUILD_BUG_ON(dsize > sizeof(ast_vhub_dev_desc));
memcpy(ep->buf, &vhub->vhub_dev_desc, dsize);
BUILD_BUG_ON(dsize > sizeof(vhub->vhub_dev_desc));
BUILD_BUG_ON(USB_DT_DEVICE_SIZE >= AST_VHUB_EP0_MAX_PACKET);
break;
case USB_DT_CONFIG:
dsize = AST_VHUB_CONF_DESC_SIZE;
memcpy(ep->buf, &ast_vhub_conf_desc, dsize);
BUILD_BUG_ON(dsize > sizeof(ast_vhub_conf_desc));
memcpy(ep->buf, &vhub->vhub_conf_desc, dsize);
BUILD_BUG_ON(dsize > sizeof(vhub->vhub_conf_desc));
BUILD_BUG_ON(AST_VHUB_CONF_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
break;
case USB_DT_HUB:
dsize = AST_VHUB_HUB_DESC_SIZE;
memcpy(ep->buf, &ast_vhub_hub_desc, dsize);
BUILD_BUG_ON(dsize > sizeof(ast_vhub_hub_desc));
memcpy(ep->buf, &vhub->vhub_hub_desc, dsize);
BUILD_BUG_ON(dsize > sizeof(vhub->vhub_hub_desc));
BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
break;
default:
@ -317,7 +314,8 @@ static int ast_vhub_rep_string(struct ast_vhub_ep *ep,
u8 string_id, u16 lang_id,
u16 len)
{
int rc = usb_gadget_get_string (&ast_vhub_strings, string_id, ep->buf);
int rc = usb_gadget_get_string(&ep->vhub->vhub_str_desc,
string_id, ep->buf);
/*
* This should never happen unless we put too big strings in
@ -834,9 +832,30 @@ void ast_vhub_hub_reset(struct ast_vhub *vhub)
writel(0, vhub->regs + AST_VHUB_EP1_STS_CHG);
}
static void ast_vhub_init_desc(struct ast_vhub *vhub)
{
/* Initialize vhub Device Descriptor. */
memcpy(&vhub->vhub_dev_desc, &ast_vhub_dev_desc,
sizeof(vhub->vhub_dev_desc));
/* Initialize vhub Configuration Descriptor. */
memcpy(&vhub->vhub_conf_desc, &ast_vhub_conf_desc,
sizeof(vhub->vhub_conf_desc));
/* Initialize vhub Hub Descriptor. */
memcpy(&vhub->vhub_hub_desc, &ast_vhub_hub_desc,
sizeof(vhub->vhub_hub_desc));
/* Initialize vhub String Descriptors. */
memcpy(&vhub->vhub_str_desc, &ast_vhub_strings,
sizeof(vhub->vhub_str_desc));
}
void ast_vhub_init_hub(struct ast_vhub *vhub)
{
vhub->speed = USB_SPEED_UNKNOWN;
INIT_WORK(&vhub->wake_work, ast_vhub_wake_work);
ast_vhub_init_desc(vhub);
}

15
drivers/usb/gadget/udc/aspeed-vhub/vhub.h
View File

@ -2,6 +2,9 @@
#ifndef __ASPEED_VHUB_H
#define __ASPEED_VHUB_H
#include <linux/usb.h>
#include <linux/usb/ch11.h>
/*****************************
* *
* VHUB register definitions *
@ -373,6 +376,12 @@ struct ast_vhub_port {
struct ast_vhub_dev dev;
};
struct ast_vhub_full_cdesc {
struct usb_config_descriptor cfg;
struct usb_interface_descriptor intf;
struct usb_endpoint_descriptor ep;
} __packed;
/* Global vhub structure */
struct ast_vhub {
struct platform_device *pdev;
@ -409,6 +418,12 @@ struct ast_vhub {
/* Upstream bus speed captured at bus reset */
unsigned int speed;
/* Standard USB Descriptors of the vhub. */
struct usb_device_descriptor vhub_dev_desc;
struct ast_vhub_full_cdesc vhub_conf_desc;
struct usb_hub_descriptor vhub_hub_desc;
struct usb_gadget_strings vhub_str_desc;
};
/* Standard request handlers result codes */