qemu/hw/usb-bus.c
Jan Kiszka 3741715cf2 usb: Resolve warnings about unassigned bus on usb device creation
When creating an USB device the old way, there is no way to specify the
target bus. Thus the warning issued by usb_create makes no sense and
rather confuses our users.

Resolve this by passing a bus reference to the usbdevice_init handler
and letting those handlers forward it to usb_create.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-02-27 15:40:53 +01:00

585 lines
15 KiB
C

#include "hw.h"
#include "usb.h"
#include "qdev.h"
#include "sysemu.h"
#include "monitor.h"
#include "trace.h"
static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
static char *usb_get_dev_path(DeviceState *dev);
static char *usb_get_fw_dev_path(DeviceState *qdev);
static int usb_qdev_exit(DeviceState *qdev);
static struct BusInfo usb_bus_info = {
.name = "USB",
.size = sizeof(USBBus),
.print_dev = usb_bus_dev_print,
.get_dev_path = usb_get_dev_path,
.get_fw_dev_path = usb_get_fw_dev_path,
.props = (Property[]) {
DEFINE_PROP_STRING("port", USBDevice, port_path),
DEFINE_PROP_END_OF_LIST()
},
};
static int next_usb_bus = 0;
static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
const VMStateDescription vmstate_usb_device = {
.name = "USBDevice",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField []) {
VMSTATE_UINT8(addr, USBDevice),
VMSTATE_INT32(state, USBDevice),
VMSTATE_INT32(remote_wakeup, USBDevice),
VMSTATE_INT32(setup_state, USBDevice),
VMSTATE_INT32(setup_len, USBDevice),
VMSTATE_INT32(setup_index, USBDevice),
VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
VMSTATE_END_OF_LIST(),
}
};
void usb_bus_new(USBBus *bus, USBBusOps *ops, DeviceState *host)
{
qbus_create_inplace(&bus->qbus, &usb_bus_info, host, NULL);
bus->ops = ops;
bus->busnr = next_usb_bus++;
bus->qbus.allow_hotplug = 1; /* Yes, we can */
QTAILQ_INIT(&bus->free);
QTAILQ_INIT(&bus->used);
QTAILQ_INSERT_TAIL(&busses, bus, next);
}
USBBus *usb_bus_find(int busnr)
{
USBBus *bus;
if (-1 == busnr)
return QTAILQ_FIRST(&busses);
QTAILQ_FOREACH(bus, &busses, next) {
if (bus->busnr == busnr)
return bus;
}
return NULL;
}
static int usb_device_init(USBDevice *dev)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->init) {
return klass->init(dev);
}
return 0;
}
USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->find_device) {
return klass->find_device(dev, addr);
}
return NULL;
}
static void usb_device_handle_destroy(USBDevice *dev)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->handle_destroy) {
klass->handle_destroy(dev);
}
}
void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->cancel_packet) {
klass->cancel_packet(dev, p);
}
}
void usb_device_handle_attach(USBDevice *dev)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->handle_attach) {
klass->handle_attach(dev);
}
}
void usb_device_handle_reset(USBDevice *dev)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->handle_reset) {
klass->handle_reset(dev);
}
}
int usb_device_handle_control(USBDevice *dev, USBPacket *p, int request,
int value, int index, int length, uint8_t *data)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->handle_control) {
return klass->handle_control(dev, p, request, value, index, length,
data);
}
return -ENOSYS;
}
int usb_device_handle_data(USBDevice *dev, USBPacket *p)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->handle_data) {
return klass->handle_data(dev, p);
}
return -ENOSYS;
}
const char *usb_device_get_product_desc(USBDevice *dev)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
return klass->product_desc;
}
const USBDesc *usb_device_get_usb_desc(USBDevice *dev)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
return klass->usb_desc;
}
void usb_device_set_interface(USBDevice *dev, int interface,
int alt_old, int alt_new)
{
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->set_interface) {
klass->set_interface(dev, interface, alt_old, alt_new);
}
}
static int usb_qdev_init(DeviceState *qdev)
{
USBDevice *dev = USB_DEVICE(qdev);
int rc;
pstrcpy(dev->product_desc, sizeof(dev->product_desc),
usb_device_get_product_desc(dev));
dev->auto_attach = 1;
QLIST_INIT(&dev->strings);
usb_ep_init(dev);
rc = usb_claim_port(dev);
if (rc != 0) {
return rc;
}
rc = usb_device_init(dev);
if (rc != 0) {
usb_release_port(dev);
return rc;
}
if (dev->auto_attach) {
rc = usb_device_attach(dev);
if (rc != 0) {
usb_qdev_exit(qdev);
return rc;
}
}
return 0;
}
static int usb_qdev_exit(DeviceState *qdev)
{
USBDevice *dev = USB_DEVICE(qdev);
if (dev->attached) {
usb_device_detach(dev);
}
usb_device_handle_destroy(dev);
if (dev->port) {
usb_release_port(dev);
}
return 0;
}
typedef struct LegacyUSBFactory
{
const char *name;
const char *usbdevice_name;
USBDevice *(*usbdevice_init)(USBBus *bus, const char *params);
} LegacyUSBFactory;
static GSList *legacy_usb_factory;
void usb_legacy_register(const char *typename, const char *usbdevice_name,
USBDevice *(*usbdevice_init)(USBBus *bus,
const char *params))
{
if (usbdevice_name) {
LegacyUSBFactory *f = g_malloc0(sizeof(*f));
f->name = typename;
f->usbdevice_name = usbdevice_name;
f->usbdevice_init = usbdevice_init;
legacy_usb_factory = g_slist_append(legacy_usb_factory, f);
}
}
USBDevice *usb_create(USBBus *bus, const char *name)
{
DeviceState *dev;
dev = qdev_create(&bus->qbus, name);
return USB_DEVICE(dev);
}
USBDevice *usb_create_simple(USBBus *bus, const char *name)
{
USBDevice *dev = usb_create(bus, name);
int rc;
if (!dev) {
error_report("Failed to create USB device '%s'", name);
return NULL;
}
rc = qdev_init(&dev->qdev);
if (rc < 0) {
error_report("Failed to initialize USB device '%s'", name);
return NULL;
}
return dev;
}
static void usb_fill_port(USBPort *port, void *opaque, int index,
USBPortOps *ops, int speedmask)
{
port->opaque = opaque;
port->index = index;
port->ops = ops;
port->speedmask = speedmask;
usb_port_location(port, NULL, index + 1);
}
void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
USBPortOps *ops, int speedmask)
{
usb_fill_port(port, opaque, index, ops, speedmask);
QTAILQ_INSERT_TAIL(&bus->free, port, next);
bus->nfree++;
}
int usb_register_companion(const char *masterbus, USBPort *ports[],
uint32_t portcount, uint32_t firstport,
void *opaque, USBPortOps *ops, int speedmask)
{
USBBus *bus;
int i;
QTAILQ_FOREACH(bus, &busses, next) {
if (strcmp(bus->qbus.name, masterbus) == 0) {
break;
}
}
if (!bus || !bus->ops->register_companion) {
qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
"an USB masterbus");
if (bus) {
error_printf_unless_qmp(
"USB bus '%s' does not allow companion controllers\n",
masterbus);
}
return -1;
}
for (i = 0; i < portcount; i++) {
usb_fill_port(ports[i], opaque, i, ops, speedmask);
}
return bus->ops->register_companion(bus, ports, portcount, firstport);
}
void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
{
if (upstream) {
snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
upstream->path, portnr);
} else {
snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
}
}
void usb_unregister_port(USBBus *bus, USBPort *port)
{
if (port->dev)
qdev_free(&port->dev->qdev);
QTAILQ_REMOVE(&bus->free, port, next);
bus->nfree--;
}
int usb_claim_port(USBDevice *dev)
{
USBBus *bus = usb_bus_from_device(dev);
USBPort *port;
assert(dev->port == NULL);
if (dev->port_path) {
QTAILQ_FOREACH(port, &bus->free, next) {
if (strcmp(port->path, dev->port_path) == 0) {
break;
}
}
if (port == NULL) {
error_report("Error: usb port %s (bus %s) not found (in use?)",
dev->port_path, bus->qbus.name);
return -1;
}
} else {
if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
/* Create a new hub and chain it on */
usb_create_simple(bus, "usb-hub");
}
if (bus->nfree == 0) {
error_report("Error: tried to attach usb device %s to a bus "
"with no free ports", dev->product_desc);
return -1;
}
port = QTAILQ_FIRST(&bus->free);
}
trace_usb_port_claim(bus->busnr, port->path);
QTAILQ_REMOVE(&bus->free, port, next);
bus->nfree--;
dev->port = port;
port->dev = dev;
QTAILQ_INSERT_TAIL(&bus->used, port, next);
bus->nused++;
return 0;
}
void usb_release_port(USBDevice *dev)
{
USBBus *bus = usb_bus_from_device(dev);
USBPort *port = dev->port;
assert(port != NULL);
trace_usb_port_release(bus->busnr, port->path);
QTAILQ_REMOVE(&bus->used, port, next);
bus->nused--;
dev->port = NULL;
port->dev = NULL;
QTAILQ_INSERT_TAIL(&bus->free, port, next);
bus->nfree++;
}
int usb_device_attach(USBDevice *dev)
{
USBBus *bus = usb_bus_from_device(dev);
USBPort *port = dev->port;
assert(port != NULL);
assert(!dev->attached);
trace_usb_port_attach(bus->busnr, port->path);
if (!(port->speedmask & dev->speedmask)) {
error_report("Warning: speed mismatch trying to attach "
"usb device %s to bus %s",
dev->product_desc, bus->qbus.name);
return -1;
}
dev->attached++;
usb_attach(port);
return 0;
}
int usb_device_detach(USBDevice *dev)
{
USBBus *bus = usb_bus_from_device(dev);
USBPort *port = dev->port;
assert(port != NULL);
assert(dev->attached);
trace_usb_port_detach(bus->busnr, port->path);
usb_detach(port);
dev->attached--;
return 0;
}
int usb_device_delete_addr(int busnr, int addr)
{
USBBus *bus;
USBPort *port;
USBDevice *dev;
bus = usb_bus_find(busnr);
if (!bus)
return -1;
QTAILQ_FOREACH(port, &bus->used, next) {
if (port->dev->addr == addr)
break;
}
if (!port)
return -1;
dev = port->dev;
qdev_free(&dev->qdev);
return 0;
}
static const char *usb_speed(unsigned int speed)
{
static const char *txt[] = {
[ USB_SPEED_LOW ] = "1.5",
[ USB_SPEED_FULL ] = "12",
[ USB_SPEED_HIGH ] = "480",
[ USB_SPEED_SUPER ] = "5000",
};
if (speed >= ARRAY_SIZE(txt))
return "?";
return txt[speed];
}
static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
{
USBDevice *dev = USB_DEVICE(qdev);
USBBus *bus = usb_bus_from_device(dev);
monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
indent, "", bus->busnr, dev->addr,
dev->port ? dev->port->path : "-",
usb_speed(dev->speed), dev->product_desc,
dev->attached ? ", attached" : "");
}
static char *usb_get_dev_path(DeviceState *qdev)
{
USBDevice *dev = USB_DEVICE(qdev);
return g_strdup(dev->port->path);
}
static char *usb_get_fw_dev_path(DeviceState *qdev)
{
USBDevice *dev = USB_DEVICE(qdev);
char *fw_path, *in;
ssize_t pos = 0, fw_len;
long nr;
fw_len = 32 + strlen(dev->port->path) * 6;
fw_path = g_malloc(fw_len);
in = dev->port->path;
while (fw_len - pos > 0) {
nr = strtol(in, &in, 10);
if (in[0] == '.') {
/* some hub between root port and device */
pos += snprintf(fw_path + pos, fw_len - pos, "hub@%ld/", nr);
in++;
} else {
/* the device itself */
pos += snprintf(fw_path + pos, fw_len - pos, "%s@%ld",
qdev_fw_name(qdev), nr);
break;
}
}
return fw_path;
}
void usb_info(Monitor *mon)
{
USBBus *bus;
USBDevice *dev;
USBPort *port;
if (QTAILQ_EMPTY(&busses)) {
monitor_printf(mon, "USB support not enabled\n");
return;
}
QTAILQ_FOREACH(bus, &busses, next) {
QTAILQ_FOREACH(port, &bus->used, next) {
dev = port->dev;
if (!dev)
continue;
monitor_printf(mon, " Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
dev->product_desc);
}
}
}
/* handle legacy -usbdevice cmd line option */
USBDevice *usbdevice_create(const char *cmdline)
{
USBBus *bus = usb_bus_find(-1 /* any */);
LegacyUSBFactory *f = NULL;
GSList *i;
char driver[32];
const char *params;
int len;
params = strchr(cmdline,':');
if (params) {
params++;
len = params - cmdline;
if (len > sizeof(driver))
len = sizeof(driver);
pstrcpy(driver, len, cmdline);
} else {
params = "";
pstrcpy(driver, sizeof(driver), cmdline);
}
for (i = legacy_usb_factory; i; i = i->next) {
f = i->data;
if (strcmp(f->usbdevice_name, driver) == 0) {
break;
}
}
if (i == NULL) {
#if 0
/* no error because some drivers are not converted (yet) */
error_report("usbdevice %s not found", driver);
#endif
return NULL;
}
if (!f->usbdevice_init) {
if (*params) {
error_report("usbdevice %s accepts no params", driver);
return NULL;
}
return usb_create_simple(bus, f->name);
}
return f->usbdevice_init(bus, params);
}
static void usb_device_class_init(ObjectClass *klass, void *data)
{
DeviceClass *k = DEVICE_CLASS(klass);
k->bus_info = &usb_bus_info;
k->init = usb_qdev_init;
k->unplug = qdev_simple_unplug_cb;
k->exit = usb_qdev_exit;
}
static TypeInfo usb_device_type_info = {
.name = TYPE_USB_DEVICE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(USBDevice),
.abstract = true,
.class_size = sizeof(USBDeviceClass),
.class_init = usb_device_class_init,
};
static void usb_register_types(void)
{
type_register_static(&usb_device_type_info);
}
type_init(usb_register_types)