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rockbox/firmware/usbstack/usb_core.c
Aidan MacDonald 1025283042 usb: Fix iPod video connection issues 
Apparently a response is coming out of nowhere and tripping this
check. I can't be bothered to look into it; it would be better to
just update the ARC USB driver to the new control request API...

Change-Id: Ic5062443e060534f170d3afe17c00d3c25d1d3bd
2023-01-23 16:04:16 +00:00

1173 lines
36 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Björn Stenberg
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "system.h"
#include "thread.h"
#include "kernel.h"
#include "string.h"
#include "panic.h"
/*#define LOGF_ENABLE*/
#include "logf.h"
#include "usb.h"
#include "usb_ch9.h"
#include "usb_drv.h"
#include "usb_core.h"
#include "usb_class_driver.h"
#if defined(USB_ENABLE_STORAGE)
#include "usb_storage.h"
#endif
#if defined(USB_ENABLE_SERIAL)
#include "usb_serial.h"
#endif
#if defined(USB_ENABLE_CHARGING_ONLY)
#include "usb_charging_only.h"
#endif
#ifdef USB_ENABLE_HID
#include "usb_hid.h"
#endif
/* TODO: Move target-specific stuff somewhere else (serial number reading) */
#ifdef HAVE_AS3514
#include "ascodec.h"
#include "as3514.h"
#endif
#if !defined(HAVE_AS3514) && !defined(IPOD_ARCH) && (CONFIG_STORAGE & STORAGE_ATA)
#include "ata.h"
#endif
#if (CONFIG_CPU == IMX233)
#include "ocotp-imx233.h"
#endif
#ifdef SANSA_CONNECT
#include "cryptomem-sansaconnect.h"
#endif
#ifndef USB_MAX_CURRENT
#define USB_MAX_CURRENT 500
#endif
/*-------------------------------------------------------------------------*/
/* USB protocol descriptors: */
static struct usb_device_descriptor __attribute__((aligned(2)))
device_descriptor=
{
.bLength = sizeof(struct usb_device_descriptor),
.bDescriptorType = USB_DT_DEVICE,
#ifndef USB_NO_HIGH_SPEED
.bcdUSB = 0x0200,
#else
.bcdUSB = 0x0110,
#endif
.bDeviceClass = USB_CLASS_PER_INTERFACE,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = 64,
.idVendor = USB_VENDOR_ID,
.idProduct = USB_PRODUCT_ID,
.bcdDevice = 0x0100,
.iManufacturer = USB_STRING_INDEX_MANUFACTURER,
.iProduct = USB_STRING_INDEX_PRODUCT,
.iSerialNumber = USB_STRING_INDEX_SERIAL,
.bNumConfigurations = 1
} ;
static struct usb_config_descriptor __attribute__((aligned(2)))
config_descriptor =
{
.bLength = sizeof(struct usb_config_descriptor),
.bDescriptorType = USB_DT_CONFIG,
.wTotalLength = 0, /* will be filled in later */
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = (USB_MAX_CURRENT + 1) / 2, /* In 2mA units */
};
static const struct usb_qualifier_descriptor __attribute__((aligned(2)))
qualifier_descriptor =
{
.bLength = sizeof(struct usb_qualifier_descriptor),
.bDescriptorType = USB_DT_DEVICE_QUALIFIER,
.bcdUSB = 0x0200,
.bDeviceClass = 0,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = 64,
.bNumConfigurations = 1
};
static const struct usb_string_descriptor __attribute__((aligned(2)))
usb_string_iManufacturer =
USB_STRING_INITIALIZER(u"Rockbox.org");
static const struct usb_string_descriptor __attribute__((aligned(2)))
usb_string_iProduct =
USB_STRING_INITIALIZER(u"Rockbox media player");
static struct usb_string_descriptor __attribute__((aligned(2)))
usb_string_iSerial =
USB_STRING_INITIALIZER(u"00000000000000000000000000000000000000000");
/* Generic for all targets */
/* this is stringid #0: languages supported */
static const struct usb_string_descriptor __attribute__((aligned(2)))
lang_descriptor =
USB_STRING_INITIALIZER(u"\x0409"); /* LANGID US English */
static const struct usb_string_descriptor* const usb_strings[USB_STRING_INDEX_MAX] =
{
[USB_STRING_INDEX_LANGUAGE] = &lang_descriptor,
[USB_STRING_INDEX_MANUFACTURER] = &usb_string_iManufacturer,
[USB_STRING_INDEX_PRODUCT] = &usb_string_iProduct,
[USB_STRING_INDEX_SERIAL] = &usb_string_iSerial,
};
static int usb_address = 0;
static bool initialized = false;
static bool drivers_connected = false;
static enum { DEFAULT, ADDRESS, CONFIGURED } usb_state;
#ifdef HAVE_USB_CHARGING_ENABLE
static int usb_charging_mode = USB_CHARGING_DISABLE;
static int usb_charging_current_requested = 500;
static struct timeout usb_no_host_timeout;
static bool usb_no_host = false;
static int usb_no_host_callback(struct timeout *tmo)
{
(void)tmo;
usb_no_host = true;
usb_charger_update();
return 0;
}
#endif
static int usb_core_num_interfaces;
typedef void (*completion_handler_t)(int ep, int dir, int status, int length);
typedef bool (*control_handler_t)(struct usb_ctrlrequest* req, void* reqdata,
unsigned char* dest);
static struct
{
completion_handler_t completion_handler[2];
control_handler_t control_handler[2];
struct usb_transfer_completion_event_data completion_event[2];
} ep_data[USB_NUM_ENDPOINTS];
static struct usb_class_driver drivers[USB_NUM_DRIVERS] =
{
#ifdef USB_ENABLE_STORAGE
[USB_DRIVER_MASS_STORAGE] = {
.enabled = false,
.needs_exclusive_storage = true,
.first_interface = 0,
.last_interface = 0,
.request_endpoints = usb_storage_request_endpoints,
.set_first_interface = usb_storage_set_first_interface,
.get_config_descriptor = usb_storage_get_config_descriptor,
.init_connection = usb_storage_init_connection,
.init = usb_storage_init,
.disconnect = usb_storage_disconnect,
.transfer_complete = usb_storage_transfer_complete,
.control_request = usb_storage_control_request,
#ifdef HAVE_HOTSWAP
.notify_hotswap = usb_storage_notify_hotswap,
#endif
},
#endif
#ifdef USB_ENABLE_SERIAL
[USB_DRIVER_SERIAL] = {
.enabled = false,
.needs_exclusive_storage = false,
.first_interface = 0,
.last_interface = 0,
.request_endpoints = usb_serial_request_endpoints,
.set_first_interface = usb_serial_set_first_interface,
.get_config_descriptor = usb_serial_get_config_descriptor,
.init_connection = usb_serial_init_connection,
.init = usb_serial_init,
.disconnect = usb_serial_disconnect,
.transfer_complete = usb_serial_transfer_complete,
.control_request = usb_serial_control_request,
#ifdef HAVE_HOTSWAP
.notify_hotswap = NULL,
#endif
},
#endif
#ifdef USB_ENABLE_CHARGING_ONLY
[USB_DRIVER_CHARGING_ONLY] = {
.enabled = false,
.needs_exclusive_storage = false,
.first_interface = 0,
.last_interface = 0,
.request_endpoints = usb_charging_only_request_endpoints,
.set_first_interface = usb_charging_only_set_first_interface,
.get_config_descriptor = usb_charging_only_get_config_descriptor,
.init_connection = NULL,
.init = NULL,
.disconnect = NULL,
.transfer_complete = NULL,
.control_request = NULL,
#ifdef HAVE_HOTSWAP
.notify_hotswap = NULL,
#endif
},
#endif
#ifdef USB_ENABLE_HID
[USB_DRIVER_HID] = {
.enabled = false,
.needs_exclusive_storage = false,
.first_interface = 0,
.last_interface = 0,
.request_endpoints = usb_hid_request_endpoints,
.set_first_interface = usb_hid_set_first_interface,
.get_config_descriptor = usb_hid_get_config_descriptor,
.init_connection = usb_hid_init_connection,
.init = usb_hid_init,
.disconnect = usb_hid_disconnect,
.transfer_complete = usb_hid_transfer_complete,
.control_request = usb_hid_control_request,
#ifdef HAVE_HOTSWAP
.notify_hotswap = NULL,
#endif
},
#endif
};
#ifdef USB_LEGACY_CONTROL_API
static struct usb_ctrlrequest buffered_request;
static struct usb_ctrlrequest* volatile active_request = NULL;
static volatile unsigned int num_active_requests = 0;
static void* volatile control_write_data = NULL;
static volatile bool control_write_data_done = false;
#endif
static void usb_core_control_request_handler(struct usb_ctrlrequest* req, void* reqdata);
static unsigned char response_data[256] USB_DEVBSS_ATTR;
/** NOTE Serial Number
* The serial number string is split into two parts:
* - the first character indicates the set of interfaces enabled
* - the other characters form a (hopefully) unique device-specific number
* The implementation of set_serial_descriptor should left the first character
* of usb_string_iSerial unused, ie never write to
* usb_string_iSerial.wString[0] but should take it into account when
* computing the length of the descriptor
*/
static const short hex[16] = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
#ifdef IPOD_ARCH
static void set_serial_descriptor(void)
{
#ifdef IPOD_VIDEO
uint32_t* serial = (uint32_t*)0x20004034;
#else
uint32_t* serial = (uint32_t*)0x20002034;
#endif
/* We need to convert from a little-endian 64-bit int
into a utf-16 string of hex characters */
short* p = &usb_string_iSerial.wString[24];
uint32_t x;
int i, j;
for(i = 0; i < 2; i++) {
x = serial[i];
for(j = 0; j < 8; j++) {
*p-- = hex[x & 0xf];
x >>= 4;
}
}
usb_string_iSerial.bLength = 52;
}
#elif defined(HAVE_AS3514)
static void set_serial_descriptor(void)
{
unsigned char serial[AS3514_UID_LEN];
/* Align 32 digits right in the 40-digit serial number */
short* p = &usb_string_iSerial.wString[1];
int i;
ascodec_readbytes(AS3514_UID_0, AS3514_UID_LEN, serial);
for(i = 0; i < AS3514_UID_LEN; i++) {
*p++ = hex[(serial[i] >> 4) & 0xF];
*p++ = hex[(serial[i] >> 0) & 0xF];
}
usb_string_iSerial.bLength = 36 + (2 * AS3514_UID_LEN);
}
#elif (CONFIG_CPU == IMX233) && IMX233_SUBTARGET >= 3700
// FIXME where is the STMP3600 serial number stored ?
static void set_serial_descriptor(void)
{
short* p = &usb_string_iSerial.wString[1];
for(int i = 0; i < IMX233_NUM_OCOTP_OPS; i++) {
uint32_t ops = imx233_ocotp_read(&HW_OCOTP_OPSn(i));
for(int j = 0; j < 8; j++) {
*p++ = hex[(ops >> 28) & 0xF];
ops <<= 4;
}
}
usb_string_iSerial.bLength = 2 + 2 * (1 + IMX233_NUM_OCOTP_OPS * 8);
}
#elif defined(SANSA_CONNECT)
static void set_serial_descriptor(void)
{
char deviceid[32];
short* p = &usb_string_iSerial.wString[1];
int i;
if(!cryptomem_read_deviceid(deviceid)) {
for(i = 0; i < 32; i++) {
*p++ = deviceid[i];
}
usb_string_iSerial.bLength = 2 + 2 * (1 + 32);
} else {
device_descriptor.iSerialNumber = 0;
}
}
#elif (CONFIG_STORAGE & STORAGE_ATA)
/* If we don't know the device serial number, use the one
* from the disk */
static void set_serial_descriptor(void)
{
short* p = &usb_string_iSerial.wString[1];
unsigned short* identify = ata_get_identify();
unsigned short x;
int i;
for(i = 10; i < 20; i++) {
x = identify[i];
*p++ = hex[(x >> 12) & 0xF];
*p++ = hex[(x >> 8) & 0xF];
*p++ = hex[(x >> 4) & 0xF];
*p++ = hex[(x >> 0) & 0xF];
}
usb_string_iSerial.bLength = 84;
}
#elif (CONFIG_STORAGE & STORAGE_RAMDISK)
/* This "serial number" isn't unique, but it should never actually
appear in non-testing use */
static void set_serial_descriptor(void)
{
short* p = &usb_string_iSerial.wString[1];
int i;
for(i = 0; i < 16; i++) {
*p++ = hex[(2 * i) & 0xF];
*p++ = hex[(2 * i + 1) & 0xF];
}
usb_string_iSerial.bLength = 68;
}
#else
static void set_serial_descriptor(void)
{
device_descriptor.iSerialNumber = 0;
}
#endif
void usb_core_init(void)
{
int i;
if (initialized)
return;
usb_drv_init();
/* class driver init functions should be safe to call even if the driver
* won't be used. This simplifies other logic (i.e. we don't need to know
* yet which drivers will be enabled */
for(i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].init != NULL)
drivers[i].init();
initialized = true;
usb_state = DEFAULT;
#ifdef HAVE_USB_CHARGING_ENABLE
usb_no_host = false;
timeout_register(&usb_no_host_timeout, usb_no_host_callback, HZ*10, 0);
#endif
logf("usb_core_init() finished");
}
void usb_core_exit(void)
{
int i;
if(drivers_connected)
{
for(i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].enabled && drivers[i].disconnect != NULL)
{
drivers[i].disconnect();
drivers[i].enabled = false;
}
drivers_connected = false;
}
if(initialized) {
usb_drv_exit();
initialized = false;
}
usb_state = DEFAULT;
#ifdef HAVE_USB_CHARGING_ENABLE
usb_no_host = false;
usb_charging_maxcurrent_change(usb_charging_maxcurrent());
#endif
logf("usb_core_exit() finished");
}
void usb_core_handle_transfer_completion(
struct usb_transfer_completion_event_data* event)
{
completion_handler_t handler;
int ep = event->endpoint;
switch(ep) {
case EP_CONTROL:
logf("ctrl handled %ld req=0x%x",
current_tick,
((struct usb_ctrlrequest*)event->data[0])->bRequest);
usb_core_control_request_handler(
(struct usb_ctrlrequest*)event->data[0], event->data[1]);
break;
default:
handler = ep_data[ep].completion_handler[EP_DIR(event->dir)];
if(handler != NULL)
handler(ep, event->dir, event->status, event->length);
break;
}
}
void usb_core_enable_driver(int driver, bool enabled)
{
drivers[driver].enabled = enabled;
}
bool usb_core_driver_enabled(int driver)
{
return drivers[driver].enabled;
}
bool usb_core_any_exclusive_storage(void)
{
int i;
for(i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].enabled && drivers[i].needs_exclusive_storage)
return true;
return false;
}
#ifdef HAVE_HOTSWAP
void usb_core_hotswap_event(int volume, bool inserted)
{
int i;
for(i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].enabled && drivers[i].notify_hotswap != NULL)
drivers[i].notify_hotswap(volume, inserted);
}
#endif
static void usb_core_set_serial_function_id(void)
{
int i, id = 0;
for(i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].enabled)
id |= 1 << i;
usb_string_iSerial.wString[0] = hex[id];
}
int usb_core_request_endpoint(int type, int dir, struct usb_class_driver* drv)
{
int ret, ep;
ret = usb_drv_request_endpoint(type, dir);
if(ret == -1)
return -1;
dir = EP_DIR(ret);
ep = EP_NUM(ret);
ep_data[ep].completion_handler[dir] = drv->transfer_complete;
ep_data[ep].control_handler[dir] = drv->control_request;
return ret;
}
void usb_core_release_endpoint(int ep)
{
int dir;
usb_drv_release_endpoint(ep);
dir = EP_DIR(ep);
ep = EP_NUM(ep);
ep_data[ep].completion_handler[dir] = NULL;
ep_data[ep].control_handler[dir] = NULL;
}
static void allocate_interfaces_and_endpoints(void)
{
int i;
int interface = 0;
memset(ep_data, 0, sizeof(ep_data));
for(i = 0; i < USB_NUM_ENDPOINTS; i++) {
usb_drv_release_endpoint(i | USB_DIR_OUT);
usb_drv_release_endpoint(i | USB_DIR_IN);
}
for(i = 0; i < USB_NUM_DRIVERS; i++) {
if(drivers[i].enabled) {
drivers[i].first_interface = interface;
if(drivers[i].request_endpoints(&drivers[i])) {
drivers[i].enabled = false;
continue;
}
interface = drivers[i].set_first_interface(interface);
drivers[i].last_interface = interface;
}
}
usb_core_num_interfaces = interface;
}
static void control_request_handler_drivers(struct usb_ctrlrequest* req, void* reqdata)
{
int i, interface = req->wIndex & 0xff;
bool handled = false;
for(i = 0; i < USB_NUM_DRIVERS; i++) {
if(drivers[i].enabled &&
drivers[i].control_request &&
drivers[i].first_interface <= interface &&
drivers[i].last_interface > interface)
{
handled = drivers[i].control_request(req, reqdata, response_data);
if(handled)
break;
}
}
if(!handled) {
/* nope. flag error */
logf("bad req:desc %d:%d", req->bRequest, req->wValue >> 8);
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
}
}
static void request_handler_device_get_descriptor(struct usb_ctrlrequest* req, void* reqdata)
{
int size;
const void* ptr = NULL;
int length = req->wLength;
int index = req->wValue & 0xff;
switch(req->wValue >> 8) { /* type */
case USB_DT_DEVICE:
ptr = &device_descriptor;
size = sizeof(struct usb_device_descriptor);
break;
case USB_DT_OTHER_SPEED_CONFIG:
case USB_DT_CONFIG: {
int i, max_packet_size;
if(req->wValue>>8==USB_DT_CONFIG) {
max_packet_size = (usb_drv_port_speed() ? 512 : 64);
config_descriptor.bDescriptorType = USB_DT_CONFIG;
}
else {
max_packet_size=(usb_drv_port_speed() ? 64 : 512);
config_descriptor.bDescriptorType =
USB_DT_OTHER_SPEED_CONFIG;
}
#ifdef HAVE_USB_CHARGING_ENABLE
if (usb_charging_mode == USB_CHARGING_DISABLE) {
config_descriptor.bMaxPower = (100+1)/2;
usb_charging_current_requested = 100;
}
else {
config_descriptor.bMaxPower = (500+1)/2;
usb_charging_current_requested = 500;
}
#endif
size = sizeof(struct usb_config_descriptor);
for(i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].enabled && drivers[i].get_config_descriptor)
size += drivers[i].get_config_descriptor(
&response_data[size], max_packet_size);
config_descriptor.bNumInterfaces = usb_core_num_interfaces;
config_descriptor.wTotalLength = (uint16_t)size;
memcpy(&response_data[0], &config_descriptor,
sizeof(struct usb_config_descriptor));
ptr = response_data;
break;
}
case USB_DT_STRING:
logf("STRING %d", index);
if((unsigned)index < USB_STRING_INDEX_MAX) {
size = usb_strings[index]->bLength;
ptr = usb_strings[index];
}
else if(index == 0xee) {
/* We don't have a real OS descriptor, and we don't handle
* STALL correctly on some devices, so we return any valid
* string (we arbitrarily pick the manufacturer name)
*/
size = usb_string_iManufacturer.bLength;
ptr = &usb_string_iManufacturer;
}
else {
logf("bad string id %d", index);
ptr = NULL;
}
break;
case USB_DT_DEVICE_QUALIFIER:
ptr = &qualifier_descriptor;
size = sizeof(struct usb_qualifier_descriptor);
break;
default:
logf("ctrl desc.");
control_request_handler_drivers(req, reqdata);
return;
}
if(ptr) {
logf("data %d (%d)", size, length);
length = MIN(size, length);
if (ptr != response_data)
memcpy(response_data, ptr, length);
usb_drv_control_response(USB_CONTROL_ACK, response_data, length);
} else {
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
}
}
static void usb_core_do_set_addr(uint8_t address)
{
logf("usb_core: SET_ADR %d", address);
usb_address = address;
usb_state = ADDRESS;
}
static void usb_core_do_set_config(uint8_t config)
{
logf("usb_core: SET_CONFIG %d",config);
if(config) {
usb_state = CONFIGURED;
if(drivers_connected)
for(int i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].enabled && drivers[i].disconnect != NULL)
drivers[i].disconnect();
for(int i = 0; i < USB_NUM_DRIVERS; i++)
if(drivers[i].enabled && drivers[i].init_connection)
drivers[i].init_connection();
drivers_connected = true;
}
else
usb_state = ADDRESS;
#ifdef HAVE_USB_CHARGING_ENABLE
usb_charging_maxcurrent_change(usb_charging_maxcurrent());
#endif
}
static void usb_core_do_clear_feature(int recip, int recip_nr, int feature)
{
logf("usb_core: CLEAR FEATURE (%d,%d,%d)", recip, recip_nr, feature);
if(recip == USB_RECIP_ENDPOINT)
{
if(feature == USB_ENDPOINT_HALT)
usb_drv_stall(EP_NUM(recip_nr), false, EP_DIR(recip_nr));
}
}
static void request_handler_device(struct usb_ctrlrequest* req, void* reqdata)
{
unsigned address;
switch(req->bRequest) {
case USB_REQ_GET_CONFIGURATION:
logf("usb_core: GET_CONFIG");
response_data[0] = (usb_state == ADDRESS ? 0 : 1);
usb_drv_control_response(USB_CONTROL_ACK, response_data, 1);
break;
case USB_REQ_SET_CONFIGURATION:
usb_drv_cancel_all_transfers();
usb_core_do_set_config(req->wValue);
usb_drv_control_response(USB_CONTROL_ACK, NULL, 0);
break;
case USB_REQ_SET_ADDRESS:
/* NOTE: We really have no business handling this and drivers
* should just handle it themselves. We don't care beyond
* knowing if we've been assigned an address yet, or not. */
address = req->wValue;
usb_drv_control_response(USB_CONTROL_ACK, NULL, 0);
usb_drv_cancel_all_transfers();
usb_drv_set_address(address);
usb_core_do_set_addr(address);
break;
case USB_REQ_GET_DESCRIPTOR:
logf("usb_core: GET_DESC %d", req->wValue >> 8);
request_handler_device_get_descriptor(req, reqdata);
break;
case USB_REQ_SET_FEATURE:
if(req->wValue==USB_DEVICE_TEST_MODE) {
int mode = req->wIndex >> 8;
usb_drv_control_response(USB_CONTROL_ACK, NULL, 0);
usb_drv_set_test_mode(mode);
} else {
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
}
break;
case USB_REQ_GET_STATUS:
response_data[0] = 0;
response_data[1] = 0;
usb_drv_control_response(USB_CONTROL_ACK, response_data, 2);
break;
default:
logf("bad req:desc %d:%d", req->bRequest, req->wValue);
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
break;
}
}
static void request_handler_interface_standard(struct usb_ctrlrequest* req, void* reqdata)
{
switch (req->bRequest)
{
case USB_REQ_SET_INTERFACE:
logf("usb_core: SET_INTERFACE");
usb_drv_control_response(USB_CONTROL_ACK, NULL, 0);
break;
case USB_REQ_GET_INTERFACE:
logf("usb_core: GET_INTERFACE");
response_data[0] = 0;
usb_drv_control_response(USB_CONTROL_ACK, response_data, 1);
break;
case USB_REQ_GET_STATUS:
response_data[0] = 0;
response_data[1] = 0;
usb_drv_control_response(USB_CONTROL_ACK, response_data, 2);
break;
case USB_REQ_CLEAR_FEATURE:
case USB_REQ_SET_FEATURE:
/* TODO: These used to be ignored (erroneously).
* Should they be passed to the drivers instead? */
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
break;
default:
control_request_handler_drivers(req, reqdata);
break;
}
}
static void request_handler_interface(struct usb_ctrlrequest* req, void* reqdata)
{
switch(req->bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
request_handler_interface_standard(req, reqdata);
break;
case USB_TYPE_CLASS:
control_request_handler_drivers(req, reqdata);
break;
case USB_TYPE_VENDOR:
default:
logf("bad req:desc %d", req->bRequest);
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
break;
}
}
static void request_handler_endpoint_drivers(struct usb_ctrlrequest* req, void* reqdata)
{
bool handled = false;
control_handler_t control_handler = NULL;
if(EP_NUM(req->wIndex) < USB_NUM_ENDPOINTS)
control_handler =
ep_data[EP_NUM(req->wIndex)].control_handler[EP_DIR(req->wIndex)];
if(control_handler)
handled = control_handler(req, reqdata, response_data);
if(!handled) {
/* nope. flag error */
logf("usb bad req %d", req->bRequest);
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
}
}
static void request_handler_endpoint_standard(struct usb_ctrlrequest* req, void* reqdata)
{
switch (req->bRequest) {
case USB_REQ_CLEAR_FEATURE:
usb_core_do_clear_feature(USB_RECIP_ENDPOINT,
req->wIndex,
req->wValue);
usb_drv_control_response(USB_CONTROL_ACK, NULL, 0);
break;
case USB_REQ_SET_FEATURE:
logf("usb_core: SET FEATURE (%d)", req->wValue);
if(req->wValue == USB_ENDPOINT_HALT)
usb_drv_stall(EP_NUM(req->wIndex), true, EP_DIR(req->wIndex));
usb_drv_control_response(USB_CONTROL_ACK, NULL, 0);
break;
case USB_REQ_GET_STATUS:
response_data[0] = 0;
response_data[1] = 0;
logf("usb_core: GET_STATUS");
if(req->wIndex > 0)
response_data[0] = usb_drv_stalled(EP_NUM(req->wIndex),
EP_DIR(req->wIndex));
usb_drv_control_response(USB_CONTROL_ACK, response_data, 2);
break;
default:
request_handler_endpoint_drivers(req, reqdata);
break;
}
}
static void request_handler_endpoint(struct usb_ctrlrequest* req, void* reqdata)
{
switch(req->bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
request_handler_endpoint_standard(req, reqdata);
break;
case USB_TYPE_CLASS:
request_handler_endpoint_drivers(req, reqdata);
break;
case USB_TYPE_VENDOR:
default:
logf("bad req:desc %d", req->bRequest);
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
break;
}
}
/* Handling USB requests starts here */
static void usb_core_control_request_handler(struct usb_ctrlrequest* req, void* reqdata)
{
#ifdef HAVE_USB_CHARGING_ENABLE
timeout_cancel(&usb_no_host_timeout);
if(usb_no_host) {
usb_no_host = false;
usb_charging_maxcurrent_change(usb_charging_maxcurrent());
}
#endif
if(usb_state == DEFAULT) {
set_serial_descriptor();
usb_core_set_serial_function_id();
allocate_interfaces_and_endpoints();
}
switch(req->bRequestType & USB_RECIP_MASK) {
case USB_RECIP_DEVICE:
request_handler_device(req, reqdata);
break;
case USB_RECIP_INTERFACE:
request_handler_interface(req, reqdata);
break;
case USB_RECIP_ENDPOINT:
request_handler_endpoint(req, reqdata);
break;
default:
logf("unsupported recipient");
usb_drv_control_response(USB_CONTROL_STALL, NULL, 0);
break;
}
}
/* called by usb_drv_int() */
void usb_core_bus_reset(void)
{
logf("usb_core: bus reset");
usb_address = 0;
usb_state = DEFAULT;
#ifdef HAVE_USB_CHARGING_ENABLE
#ifdef HAVE_USB_CHARGING_IN_THREAD
/* On some targets usb_charging_maxcurrent_change() cannot be called
* from an interrupt handler; get the USB thread to do it instead. */
usb_charger_update();
#else
usb_charging_maxcurrent_change(usb_charging_maxcurrent());
#endif
#endif
}
/* called by usb_drv_transfer_completed() */
void usb_core_transfer_complete(int endpoint, int dir, int status, int length)
{
struct usb_transfer_completion_event_data* completion_event =
&ep_data[endpoint].completion_event[EP_DIR(dir)];
void* data0 = NULL;
void* data1 = NULL;
#ifdef USB_LEGACY_CONTROL_API
if(endpoint == EP_CONTROL) {
bool cwdd = control_write_data_done;
struct usb_ctrlrequest* req = active_request;
if(dir == USB_DIR_OUT && req && cwdd) {
data0 = req;
data1 = control_write_data;
} else {
return;
}
}
#endif
completion_event->endpoint = endpoint;
completion_event->dir = dir;
completion_event->data[0] = data0;
completion_event->data[1] = data1;
completion_event->status = status;
completion_event->length = length;
usb_signal_transfer_completion(completion_event);
}
void usb_core_handle_notify(long id, intptr_t data)
{
switch(id)
{
case USB_NOTIFY_SET_ADDR:
usb_core_do_set_addr(data);
break;
case USB_NOTIFY_SET_CONFIG:
usb_core_do_set_config(data);
break;
default:
break;
}
}
void usb_core_control_request(struct usb_ctrlrequest* req, void* reqdata)
{
struct usb_transfer_completion_event_data* completion_event =
&ep_data[EP_CONTROL].completion_event[EP_DIR(USB_DIR_IN)];
completion_event->endpoint = EP_CONTROL;
completion_event->dir = 0;
completion_event->data[0] = (void*)req;
completion_event->data[1] = reqdata;
completion_event->status = 0;
completion_event->length = 0;
logf("ctrl received %ld, req=0x%x", current_tick, req->bRequest);
usb_signal_transfer_completion(completion_event);
}
void usb_core_control_complete(int status)
{
/* We currently don't use this, it's here to make the API look good ;)
* It makes sense to #define it away on normal builds.
*/
(void)status;
logf("ctrl complete %ld, %d", current_tick, status);
}
#ifdef USB_LEGACY_CONTROL_API
/* Only needed if the driver does not support the new API yet */
void usb_core_legacy_control_request(struct usb_ctrlrequest* req)
{
/* Only submit non-overlapping requests */
if (num_active_requests++ == 0)
{
buffered_request = *req;
active_request = &buffered_request;
control_write_data = NULL;
control_write_data_done = false;
usb_core_control_request(req, NULL);
}
}
void usb_drv_control_response(enum usb_control_response resp,
void* data, int length)
{
struct usb_ctrlrequest* req = active_request;
unsigned int num_active = num_active_requests--;
/*
* There should have been a prior request submission, at least.
* FIXME: It seems the iPod video can get here and ignoring it
* allows the connection to succeed??
*/
if (num_active == 0)
{
//panicf("null ctrl req");
return;
}
/*
* This can happen because an active request was already pending when
* the driver submitted a new one in usb_core_legacy_control_request().
* This could mean two things: (a) a driver bug; or (b) the host sent
* another request because we were too slow in handling an earlier one.
*
* The USB spec requires we respond to the latest request and drop any
* earlier ones, but that's not easy to do with the current design of
* the USB stack. Thus, the host will be expecting a response for the
* latest request, but this response is for the _earliest_ request.
*
* Play it safe and return a STALL. At this point we've recovered from
* the error on our end and will be ready to handle the next request.
*/
if (num_active > 1)
{
active_request = NULL;
num_active_requests = 0;
usb_drv_stall(EP_CONTROL, true, true);
return;
}
if(req->wLength == 0)
{
active_request = NULL;
/* No-data request */
if(resp == USB_CONTROL_ACK)
usb_drv_send(EP_CONTROL, data, length);
else if(resp == USB_CONTROL_STALL)
usb_drv_stall(EP_CONTROL, true, true);
else
panicf("RECEIVE on non-data req");
}
else if(req->bRequestType & USB_DIR_IN)
{
/* Control read request */
if(resp == USB_CONTROL_ACK)
{
active_request = NULL;
usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0);
usb_drv_send(EP_CONTROL, data, length);
}
else if(resp == USB_CONTROL_STALL)
{
active_request = NULL;
usb_drv_stall(EP_CONTROL, true, true);
}
else
{
panicf("RECEIVE on ctrl read req");
}
}
else if(!control_write_data_done)
{
/* Control write request, data phase */
if(resp == USB_CONTROL_RECEIVE)
{
control_write_data = data;
control_write_data_done = true;
usb_drv_recv_nonblocking(EP_CONTROL, data, length);
}
else if(resp == USB_CONTROL_STALL)
{
/* We should stall the OUT endpoint here, but the old code did
* not do so and some drivers may not handle it correctly. */
active_request = NULL;
usb_drv_stall(EP_CONTROL, true, true);
}
else
{
panicf("ACK on ctrl write data");
}
}
else
{
active_request = NULL;
control_write_data = NULL;
control_write_data_done = false;
/* Control write request, status phase */
if(resp == USB_CONTROL_ACK)
usb_drv_send(EP_CONTROL, NULL, 0);
else if(resp == USB_CONTROL_STALL)
usb_drv_stall(EP_CONTROL, true, true);
else
panicf("RECEIVE on ctrl write status");
}
}
#endif
void usb_core_notify_set_address(uint8_t addr)
{
logf("notify set addr received %ld", current_tick);
usb_signal_notify(USB_NOTIFY_SET_ADDR, addr);
}
void usb_core_notify_set_config(uint8_t config)
{
logf("notify set config received %ld", current_tick);
usb_signal_notify(USB_NOTIFY_SET_CONFIG, config);
}
#ifdef HAVE_USB_CHARGING_ENABLE
void usb_charging_enable(int state)
{
usb_charging_mode = state;
usb_charging_maxcurrent_change(usb_charging_maxcurrent());
}
int usb_charging_maxcurrent()
{
if (!initialized || usb_charging_mode == USB_CHARGING_DISABLE)
return 100;
if (usb_state == CONFIGURED)
return usb_charging_current_requested;
if (usb_charging_mode == USB_CHARGING_FORCE && usb_no_host)
return 500;
return 100;
}
#endif
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