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u-boot/drivers/usb/gadget/ep0.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

596 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003
* Gerry Hamel, geh@ti.com, Texas Instruments
*
* (C) Copyright 2006
* Bryan O'Donoghue, deckard@CodeHermit.ie
*
* Based on
* linux/drivers/usbd/ep0.c
*
* Copyright (c) 2000, 2001, 2002 Lineo
* Copyright (c) 2001 Hewlett Packard
*
* By:
* Stuart Lynne <sl@lineo.com>,
* Tom Rushworth <tbr@lineo.com>,
* Bruce Balden <balden@lineo.com>
*/
/*
* This is the builtin ep0 control function. It implements all required functionality
* for responding to control requests (SETUP packets).
*
* XXX
*
* Currently we do not pass any SETUP packets (or other) to the configured
* function driver. This may need to change.
*
* XXX
*
* As alluded to above, a simple callback cdc_recv_setup has been implemented
* in the usb_device data structure to facilicate passing
* Common Device Class packets to a function driver.
*
* XXX
*/
#include <common.h>
#include <usbdevice.h>
#if 0
#define dbg_ep0(lvl,fmt,args...) serial_printf("[%s] %s:%d: "fmt"\n",__FILE__,__FUNCTION__,__LINE__,##args)
#else
#define dbg_ep0(lvl,fmt,args...)
#endif
/* EP0 Configuration Set ********************************************************************* */
/**
* ep0_get_status - fill in URB data with appropriate status
* @device:
* @urb:
* @index:
* @requesttype:
*
*/
static int ep0_get_status (struct usb_device_instance *device,
struct urb *urb, int index, int requesttype)
{
char *cp;
urb->actual_length = 2;
cp = (char*)urb->buffer;
cp[0] = cp[1] = 0;
switch (requesttype) {
case USB_REQ_RECIPIENT_DEVICE:
cp[0] = USB_STATUS_SELFPOWERED;
break;
case USB_REQ_RECIPIENT_INTERFACE:
break;
case USB_REQ_RECIPIENT_ENDPOINT:
cp[0] = usbd_endpoint_halted (device, index);
break;
case USB_REQ_RECIPIENT_OTHER:
urb->actual_length = 0;
default:
break;
}
dbg_ep0 (2, "%02x %02x", cp[0], cp[1]);
return 0;
}
/**
* ep0_get_one
* @device:
* @urb:
* @result:
*
* Set a single byte value in the urb send buffer. Return non-zero to signal
* a request error.
*/
static int ep0_get_one (struct usb_device_instance *device, struct urb *urb,
__u8 result)
{
urb->actual_length = 1; /* XXX 2? */
((char *) urb->buffer)[0] = result;
return 0;
}
/**
* copy_config
* @urb: pointer to urb
* @data: pointer to configuration data
* @length: length of data
*
* Copy configuration data to urb transfer buffer if there is room for it.
*/
void copy_config (struct urb *urb, void *data, int max_length,
int max_buf)
{
int available;
int length;
/*dbg_ep0(3, "-> actual: %d buf: %d max_buf: %d max_length: %d data: %p", */
/* urb->actual_length, urb->buffer_length, max_buf, max_length, data); */
if (!data) {
dbg_ep0 (1, "data is NULL");
return;
}
length = max_length;
if (length > max_length) {
dbg_ep0 (1, "length: %d >= max_length: %d", length,
max_length);
return;
}
/*dbg_ep0(1, " actual: %d buf: %d max_buf: %d max_length: %d length: %d", */
/* urb->actual_length, urb->buffer_length, max_buf, max_length, length); */
if ((available =
/*urb->buffer_length */ max_buf - urb->actual_length) <= 0) {
return;
}
/*dbg_ep0(1, "actual: %d buf: %d max_buf: %d length: %d available: %d", */
/* urb->actual_length, urb->buffer_length, max_buf, length, available); */
if (length > available) {
length = available;
}
/*dbg_ep0(1, "actual: %d buf: %d max_buf: %d length: %d available: %d", */
/* urb->actual_length, urb->buffer_length, max_buf, length, available); */
memcpy (urb->buffer + urb->actual_length, data, length);
urb->actual_length += length;
dbg_ep0 (3,
"copy_config: <- actual: %d buf: %d max_buf: %d max_length: %d available: %d",
urb->actual_length, urb->buffer_length, max_buf, max_length,
available);
}
/**
* ep0_get_descriptor
* @device:
* @urb:
* @max:
* @descriptor_type:
* @index:
*
* Called by ep0_rx_process for a get descriptor device command. Determine what
* descriptor is being requested, copy to send buffer. Return zero if ok to send,
* return non-zero to signal a request error.
*/
static int ep0_get_descriptor (struct usb_device_instance *device,
struct urb *urb, int max, int descriptor_type,
int index)
{
int port = 0; /* XXX compound device */
/*dbg_ep0(3, "max: %x type: %x index: %x", max, descriptor_type, index); */
if (!urb || !urb->buffer || !urb->buffer_length
|| (urb->buffer_length < 255)) {
dbg_ep0 (2, "invalid urb %p", urb);
return -1L;
}
/* setup tx urb */
urb->actual_length = 0;
dbg_ep0 (2, "%s", USBD_DEVICE_DESCRIPTORS (descriptor_type));
switch (descriptor_type) {
case USB_DESCRIPTOR_TYPE_DEVICE:
{
struct usb_device_descriptor *device_descriptor;
if (!
(device_descriptor =
usbd_device_device_descriptor (device, port))) {
return -1;
}
/* copy descriptor for this device */
copy_config (urb, device_descriptor,
sizeof (struct usb_device_descriptor),
max);
/* correct the correct control endpoint 0 max packet size into the descriptor */
device_descriptor =
(struct usb_device_descriptor *) urb->buffer;
}
dbg_ep0(3, "copied device configuration, actual_length: 0x%x", urb->actual_length);
break;
case USB_DESCRIPTOR_TYPE_CONFIGURATION:
{
struct usb_configuration_descriptor
*configuration_descriptor;
struct usb_device_descriptor *device_descriptor;
if (!
(device_descriptor =
usbd_device_device_descriptor (device, port))) {
return -1;
}
/*dbg_ep0(2, "%d %d", index, device_descriptor->bNumConfigurations); */
if (index >= device_descriptor->bNumConfigurations) {
dbg_ep0 (0, "index too large: %d >= %d", index,
device_descriptor->
bNumConfigurations);
return -1;
}
if (!
(configuration_descriptor =
usbd_device_configuration_descriptor (device,
port,
index))) {
dbg_ep0 (0,
"usbd_device_configuration_descriptor failed: %d",
index);
return -1;
}
dbg_ep0(0, "attempt to copy %d bytes to urb\n",cpu_to_le16(configuration_descriptor->wTotalLength));
copy_config (urb, configuration_descriptor,
cpu_to_le16(configuration_descriptor->wTotalLength),
max);
}
break;
case USB_DESCRIPTOR_TYPE_STRING:
{
struct usb_string_descriptor *string_descriptor;
if (!(string_descriptor = usbd_get_string (index))) {
serial_printf("Invalid string index %d\n", index);
return -1;
}
dbg_ep0(3, "string_descriptor: %p length %d", string_descriptor, string_descriptor->bLength);
copy_config (urb, string_descriptor, string_descriptor->bLength, max);
}
break;
case USB_DESCRIPTOR_TYPE_INTERFACE:
serial_printf("USB_DESCRIPTOR_TYPE_INTERFACE - error not implemented\n");
return -1;
case USB_DESCRIPTOR_TYPE_ENDPOINT:
serial_printf("USB_DESCRIPTOR_TYPE_ENDPOINT - error not implemented\n");
return -1;
case USB_DESCRIPTOR_TYPE_HID:
{
serial_printf("USB_DESCRIPTOR_TYPE_HID - error not implemented\n");
return -1; /* unsupported at this time */
#if 0
int bNumInterface =
le16_to_cpu (urb->device_request.wIndex);
int bAlternateSetting = 0;
int class = 0;
struct usb_class_descriptor *class_descriptor;
if (!(class_descriptor =
usbd_device_class_descriptor_index (device,
port, 0,
bNumInterface,
bAlternateSetting,
class))
|| class_descriptor->descriptor.hid.bDescriptorType != USB_DT_HID) {
dbg_ep0 (3, "[%d] interface is not HID",
bNumInterface);
return -1;
}
/* copy descriptor for this class */
copy_config (urb, class_descriptor,
class_descriptor->descriptor.hid.bLength,
max);
#endif
}
break;
case USB_DESCRIPTOR_TYPE_REPORT:
{
serial_printf("USB_DESCRIPTOR_TYPE_REPORT - error not implemented\n");
return -1; /* unsupported at this time */
#if 0
int bNumInterface =
le16_to_cpu (urb->device_request.wIndex);
int bAlternateSetting = 0;
int class = 0;
struct usb_class_report_descriptor *report_descriptor;
if (!(report_descriptor =
usbd_device_class_report_descriptor_index
(device, port, 0, bNumInterface,
bAlternateSetting, class))
|| report_descriptor->bDescriptorType !=
USB_DT_REPORT) {
dbg_ep0 (3, "[%d] descriptor is not REPORT",
bNumInterface);
return -1;
}
/* copy report descriptor for this class */
/*copy_config(urb, &report_descriptor->bData[0], report_descriptor->wLength, max); */
if (max - urb->actual_length > 0) {
int length =
min(report_descriptor->wLength,
max - urb->actual_length);
memcpy (urb->buffer + urb->actual_length,
&report_descriptor->bData[0], length);
urb->actual_length += length;
}
#endif
}
break;
case USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER:
#if defined(CONFIG_USBD_HS)
{
struct usb_qualifier_descriptor *qualifier_descriptor =
device->qualifier_descriptor;
if (!qualifier_descriptor)
return -1;
/* copy descriptor for this device */
copy_config(urb, qualifier_descriptor,
sizeof(struct usb_qualifier_descriptor),
max);
}
dbg_ep0(3, "copied qualifier descriptor, actual_length: 0x%x",
urb->actual_length);
#else
return -1;
#endif
break;
default:
return -1;
}
dbg_ep0 (1, "urb: buffer: %p buffer_length: %2d actual_length: %2d tx_packetSize: %2d",
urb->buffer, urb->buffer_length, urb->actual_length,
device->bus->endpoint_array[0].tx_packetSize);
/*
if ((urb->actual_length < max) && !(urb->actual_length % device->bus->endpoint_array[0].tx_packetSize)) {
dbg_ep0(0, "adding null byte");
urb->buffer[urb->actual_length++] = 0;
dbg_ep0(0, "urb: buffer_length: %2d actual_length: %2d packet size: %2d",
urb->buffer_length, urb->actual_length device->bus->endpoint_array[0].tx_packetSize);
}
*/
return 0;
}
/**
* ep0_recv_setup - called to indicate URB has been received
* @urb: pointer to struct urb
*
* Check if this is a setup packet, process the device request, put results
* back into the urb and return zero or non-zero to indicate success (DATA)
* or failure (STALL).
*
*/
int ep0_recv_setup (struct urb *urb)
{
/*struct usb_device_request *request = urb->buffer; */
/*struct usb_device_instance *device = urb->device; */
struct usb_device_request *request;
struct usb_device_instance *device;
int address;
dbg_ep0 (0, "entering ep0_recv_setup()");
if (!urb || !urb->device) {
dbg_ep0 (3, "invalid URB %p", urb);
return -1;
}
request = &urb->device_request;
device = urb->device;
dbg_ep0 (3, "urb: %p device: %p", urb, urb->device);
/*dbg_ep0(2, "- - - - - - - - - -"); */
dbg_ep0 (2,
"bmRequestType:%02x bRequest:%02x wValue:%04x wIndex:%04x wLength:%04x %s",
request->bmRequestType, request->bRequest,
le16_to_cpu (request->wValue), le16_to_cpu (request->wIndex),
le16_to_cpu (request->wLength),
USBD_DEVICE_REQUESTS (request->bRequest));
/* handle USB Standard Request (c.f. USB Spec table 9-2) */
if ((request->bmRequestType & USB_REQ_TYPE_MASK) != 0) {
if(device->device_state <= STATE_CONFIGURED){
/* Attempt to handle a CDC specific request if we are
* in the configured state.
*/
return device->cdc_recv_setup(request,urb);
}
dbg_ep0 (1, "non standard request: %x",
request->bmRequestType & USB_REQ_TYPE_MASK);
return -1; /* Stall here */
}
switch (device->device_state) {
case STATE_CREATED:
case STATE_ATTACHED:
case STATE_POWERED:
/* It actually is important to allow requests in these states,
* Windows will request descriptors before assigning an
* address to the client.
*/
/*dbg_ep0 (1, "request %s not allowed in this state: %s", */
/* USBD_DEVICE_REQUESTS(request->bRequest), */
/* usbd_device_states[device->device_state]); */
/*return -1; */
break;
case STATE_INIT:
case STATE_DEFAULT:
switch (request->bRequest) {
case USB_REQ_GET_STATUS:
case USB_REQ_GET_INTERFACE:
case USB_REQ_SYNCH_FRAME: /* XXX should never see this (?) */
case USB_REQ_CLEAR_FEATURE:
case USB_REQ_SET_FEATURE:
case USB_REQ_SET_DESCRIPTOR:
/* case USB_REQ_SET_CONFIGURATION: */
case USB_REQ_SET_INTERFACE:
dbg_ep0 (1,
"request %s not allowed in DEFAULT state: %s",
USBD_DEVICE_REQUESTS (request->bRequest),
usbd_device_states[device->device_state]);
return -1;
case USB_REQ_SET_CONFIGURATION:
case USB_REQ_SET_ADDRESS:
case USB_REQ_GET_DESCRIPTOR:
case USB_REQ_GET_CONFIGURATION:
break;
}
case STATE_ADDRESSED:
case STATE_CONFIGURED:
break;
case STATE_UNKNOWN:
dbg_ep0 (1, "request %s not allowed in UNKNOWN state: %s",
USBD_DEVICE_REQUESTS (request->bRequest),
usbd_device_states[device->device_state]);
return -1;
}
/* handle all requests that return data (direction bit set on bm RequestType) */
if ((request->bmRequestType & USB_REQ_DIRECTION_MASK)) {
dbg_ep0 (3, "Device-to-Host");
switch (request->bRequest) {
case USB_REQ_GET_STATUS:
return ep0_get_status (device, urb, request->wIndex,
request->bmRequestType &
USB_REQ_RECIPIENT_MASK);
case USB_REQ_GET_DESCRIPTOR:
return ep0_get_descriptor (device, urb,
le16_to_cpu (request->wLength),
le16_to_cpu (request->wValue) >> 8,
le16_to_cpu (request->wValue) & 0xff);
case USB_REQ_GET_CONFIGURATION:
serial_printf("get config %d\n", device->configuration);
return ep0_get_one (device, urb,
device->configuration);
case USB_REQ_GET_INTERFACE:
return ep0_get_one (device, urb, device->alternate);
case USB_REQ_SYNCH_FRAME: /* XXX should never see this (?) */
return -1;
case USB_REQ_CLEAR_FEATURE:
case USB_REQ_SET_FEATURE:
case USB_REQ_SET_ADDRESS:
case USB_REQ_SET_DESCRIPTOR:
case USB_REQ_SET_CONFIGURATION:
case USB_REQ_SET_INTERFACE:
return -1;
}
}
/* handle the requests that do not return data */
else {
/*dbg_ep0(3, "Host-to-Device"); */
switch (request->bRequest) {
case USB_REQ_CLEAR_FEATURE:
case USB_REQ_SET_FEATURE:
dbg_ep0 (0, "Host-to-Device");
switch (request->
bmRequestType & USB_REQ_RECIPIENT_MASK) {
case USB_REQ_RECIPIENT_DEVICE:
/* XXX DEVICE_REMOTE_WAKEUP or TEST_MODE would be added here */
/* XXX fall through for now as we do not support either */
case USB_REQ_RECIPIENT_INTERFACE:
case USB_REQ_RECIPIENT_OTHER:
dbg_ep0 (0, "request %s not",
USBD_DEVICE_REQUESTS (request->bRequest));
default:
return -1;
case USB_REQ_RECIPIENT_ENDPOINT:
dbg_ep0 (0, "ENDPOINT: %x", le16_to_cpu (request->wValue));
if (le16_to_cpu (request->wValue) == USB_ENDPOINT_HALT) {
/*return usbd_device_feature (device, le16_to_cpu (request->wIndex), */
/* request->bRequest == USB_REQ_SET_FEATURE); */
/* NEED TO IMPLEMENT THIS!!! */
return -1;
} else {
dbg_ep0 (1, "request %s bad wValue: %04x",
USBD_DEVICE_REQUESTS
(request->bRequest),
le16_to_cpu (request->wValue));
return -1;
}
}
case USB_REQ_SET_ADDRESS:
/* check if this is a re-address, reset first if it is (this shouldn't be possible) */
if (device->device_state != STATE_DEFAULT) {
dbg_ep0 (1, "set_address: %02x state: %s",
le16_to_cpu (request->wValue),
usbd_device_states[device->device_state]);
return -1;
}
address = le16_to_cpu (request->wValue);
if ((address & 0x7f) != address) {
dbg_ep0 (1, "invalid address %04x %04x",
address, address & 0x7f);
return -1;
}
device->address = address;
/*dbg_ep0(2, "address: %d %d %d", */
/* request->wValue, le16_to_cpu(request->wValue), device->address); */
return 0;
case USB_REQ_SET_DESCRIPTOR: /* XXX should we support this? */
dbg_ep0 (0, "set descriptor: NOT SUPPORTED");
return -1;
case USB_REQ_SET_CONFIGURATION:
/* c.f. 9.4.7 - the top half of wValue is reserved */
device->configuration = le16_to_cpu(request->wValue) & 0xff;
/* reset interface and alternate settings */
device->interface = device->alternate = 0;
/*dbg_ep0(2, "set configuration: %d", device->configuration); */
/*serial_printf("DEVICE_CONFIGURED.. event?\n"); */
return 0;
case USB_REQ_SET_INTERFACE:
device->interface = le16_to_cpu (request->wIndex);
device->alternate = le16_to_cpu (request->wValue);
/*dbg_ep0(2, "set interface: %d alternate: %d", device->interface, device->alternate); */
serial_printf ("DEVICE_SET_INTERFACE.. event?\n");
return 0;
case USB_REQ_GET_STATUS:
case USB_REQ_GET_DESCRIPTOR:
case USB_REQ_GET_CONFIGURATION:
case USB_REQ_GET_INTERFACE:
case USB_REQ_SYNCH_FRAME: /* XXX should never see this (?) */
return -1;
}
}
return -1;
}
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