static int gl861_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct dvb_usb_device *d;
struct usb_host_interface *alt;
int ret;
if (intf->num_altsetting < 2)
return -ENODEV;
ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d,
adapter_nr);
if (ret == 0) {
alt = usb_altnum_to_altsetting(intf, 0);
if (alt == NULL) {
deb_rc("not alt found!\n");
return -ENODEV;
}
ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
}
return ret;
}
/* Select the MBIM altsetting iff it is preferred and available,
* returning the number of the corresponding data interface altsetting
*/
u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf)
{
struct usb_host_interface *alt;
/* The MBIM spec defines a NCM compatible default altsetting,
* which we may have matched:
*
* "Functions that implement both NCM 1.0 and MBIM (an
* “NCM/MBIM function”) according to this recommendation
* shall provide two alternate settings for the
* Communication Interface. Alternate setting 0, and the
* associated class and endpoint descriptors, shall be
* constructed according to the rules given for the
* Communication Interface in section 5 of [USBNCM10].
* Alternate setting 1, and the associated class and
* endpoint descriptors, shall be constructed according to
* the rules given in section 6 (USB Device Model) of this
* specification."
*/
if (prefer_mbim && intf->num_altsetting == 2) {
alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
if (alt && cdc_ncm_comm_intf_is_mbim(alt) &&
!usb_set_interface(dev->udev,
intf->cur_altsetting->desc.bInterfaceNumber,
CDC_NCM_COMM_ALTSETTING_MBIM))
return CDC_NCM_DATA_ALTSETTING_MBIM;
}
return CDC_NCM_DATA_ALTSETTING_NCM;
}
static int st5481_setup_d_out(struct st5481_adapter *adapter)
{
struct usb_device *dev = adapter->usb_dev;
struct usb_interface *intf;
struct usb_host_interface *altsetting = NULL;
struct usb_host_endpoint *endpoint;
struct st5481_d_out *d_out = &adapter->d_out;
DBG(2,"");
intf = usb_ifnum_to_if(dev, 0);
if (intf)
altsetting = usb_altnum_to_altsetting(intf, 3);
if (!altsetting)
return -ENXIO;
// Allocate URBs and buffers for the D channel out
endpoint = &altsetting->endpoint[EP_D_OUT-1];
DBG(2,"endpoint address=%02x,packet size=%d",
endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize));
return st5481_setup_isocpipes(d_out->urb, dev,
usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress),
NUM_ISO_PACKETS_D, SIZE_ISO_PACKETS_D_OUT,
NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT,
usb_d_out_complete, adapter);
}
static int st5481_setup_b_out(struct st5481_bcs *bcs)
{
struct usb_device *dev = bcs->adapter->usb_dev;
struct usb_interface *intf;
struct usb_host_interface *altsetting = NULL;
struct usb_host_endpoint *endpoint;
struct st5481_b_out *b_out = &bcs->b_out;
DBG(4,"");
intf = usb_ifnum_to_if(dev, 0);
if (intf)
altsetting = usb_altnum_to_altsetting(intf, 3);
if (!altsetting)
return -ENXIO;
// Allocate URBs and buffers for the B channel out
endpoint = &altsetting->endpoint[EP_B1_OUT - 1 + bcs->channel * 2];
DBG(4,"endpoint address=%02x,packet size=%d",
endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize));
// Allocate memory for 8000bytes/sec + extra bytes if underrun
return st5481_setup_isocpipes(b_out->urb, dev,
usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress),
NUM_ISO_PACKETS_B, SIZE_ISO_PACKETS_B_OUT,
NUM_ISO_PACKETS_B * SIZE_ISO_PACKETS_B_OUT + B_FLOW_ADJUST,
usb_b_out_complete, bcs);
}
static int friio_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct dvb_usb_device *d;
struct usb_host_interface *alt;
int ret;
if (intf->num_altsetting < GL861_ALTSETTING_COUNT)
return -ENODEV;
alt = usb_altnum_to_altsetting(intf, FRIIO_BULK_ALTSETTING);
if (alt == NULL) {
deb_rc("not alt found!\n");
return -ENODEV;
}
ret = usb_set_interface(interface_to_usbdev(intf),
alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
if (ret != 0) {
deb_rc("failed to set alt-setting!\n");
return ret;
}
ret = dvb_usb_device_init(intf, &friio_properties,
THIS_MODULE, &d, adapter_nr);
if (ret == 0)
friio_streaming_ctrl(&d->adapter[0], 1);
return ret;
}
static int anysee_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct dvb_usb_device *d;
struct usb_host_interface *alt;
int ret;
/* There is one interface with two alternate settings.
Alternate setting 0 is for bulk transfer.
Alternate setting 1 is for isochronous transfer.
We use bulk transfer (alternate setting 0). */
if (intf->num_altsetting < 1)
return -ENODEV;
ret = dvb_usb_device_init(intf, &anysee_properties, THIS_MODULE, &d,
adapter_nr);
if (ret)
return ret;
alt = usb_altnum_to_altsetting(intf, 0);
if (alt == NULL) {
deb_info("%s: no alt found!\n", __func__);
return -ENODEV;
}
ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
if (ret)
return ret;
if (d)
ret = anysee_init(d);
return ret;
}
static int m920x_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct dvb_usb_device *d;
struct usb_host_interface *alt;
int ret;
if ((ret = dvb_usb_device_init(intf, &megasky_properties, THIS_MODULE, &d)) == 0) {
deb_rc("probed!\n");
alt = usb_altnum_to_altsetting(intf, 1);
if (alt == NULL) {
deb_rc("not alt found!\n");
return -ENODEV;
}
ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
if (ret < 0)
return ret;
deb_rc("Changed to alternate setting!\n");
if ((ret = m9206_rc_init(d->udev)) != 0)
return ret;
}
return ret;
}
static int au6610_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct dvb_usb_device *d;
struct usb_host_interface *alt;
int ret;
if (intf->num_altsetting < AU6610_ALTSETTING_COUNT)
return -ENODEV;
ret = dvb_usb_device_init(intf, &au6610_properties, THIS_MODULE, &d,
adapter_nr);
if (ret == 0) {
alt = usb_altnum_to_altsetting(intf, AU6610_ALTSETTING);
if (alt == NULL) {
deb_info("%s: no alt found!\n", __func__);
return -ENODEV;
}
ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
}
return ret;
}
/* Callbacks for DVB USB */
static int m920x_identify_state(struct usb_device *udev,
struct dvb_usb_device_properties *props,
struct dvb_usb_device_description **desc,
int *cold)
{
struct usb_host_interface *alt;
alt = usb_altnum_to_altsetting(usb_ifnum_to_if(udev, 0), 1);
*cold = (alt == NULL) ? 1 : 0;
return 0;
}
/**
* usb_reset_configuration - lightweight device reset
* @dev: the device whose configuration is being reset
*
* This issues a standard SET_CONFIGURATION request to the device using
* the current configuration. The effect is to reset most USB-related
* state in the device, including interface altsettings (reset to zero),
* endpoint halts (cleared), and data toggle (only for bulk and interrupt
* endpoints). Other usbcore state is unchanged, including bindings of
* usb device drivers to interfaces.
*
* Because this affects multiple interfaces, avoid using this with composite
* (multi-interface) devices. Instead, the driver for each interface may
* use usb_set_interface() on the interfaces it claims. Be careful though;
* some devices don't support the SET_INTERFACE request, and others won't
* reset all the interface state (notably data toggles). Resetting the whole
* configuration would affect other drivers' interfaces.
*
* The caller must own the device lock.
*
* Returns zero on success, else a negative error code.
*/
int usb_reset_configuration(struct usb_device *dev)
{
int i, retval;
struct usb_host_config *config;
if (dev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
/* caller must have locked the device and must own
* the usb bus readlock (so driver bindings are stable);
* calls during probe() are fine
*/
for (i = 1; i < 16; ++i) {
usb_disable_endpoint(dev, i);
usb_disable_endpoint(dev, i + USB_DIR_IN);
}
config = dev->actconfig;
retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0,
config->desc.bConfigurationValue, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
if (retval < 0)
return retval;
dev->toggle[0] = dev->toggle[1] = 0;
/* re-init hc/hcd interface/endpoint state */
for (i = 0; i < config->desc.bNumInterfaces; i++) {
struct usb_interface *intf = config->interface[i];
struct usb_host_interface *alt;
if (device_is_registered(&intf->dev))
usb_remove_sysfs_intf_files(intf);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
* We could use a GetInterface call, but if a device is
* so non-compliant that it doesn't have altsetting 0
* then I wouldn't trust its reply anyway.
*/
if (!alt)
alt = &intf->altsetting[0];
intf->cur_altsetting = alt;
usb_enable_interface(dev, intf);
if (device_is_registered(&intf->dev))
usb_create_sysfs_intf_files(intf);
}
return 0;
}
static int m920x_init_ep(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_host_interface *alt;
if ((alt = usb_altnum_to_altsetting(intf, 1)) == NULL) {
deb("No alt found!\n");
return -ENODEV;
}
return usb_set_interface(udev, alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
}
static struct usb_interface *xusbatm_find_intf(struct usb_device *usb_dev, int altsetting, u8 ep)
{
struct usb_host_interface *alt;
struct usb_interface *intf;
int i, j;
for (i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++)
if ((intf = usb_dev->actconfig->interface[i]) && (alt = usb_altnum_to_altsetting(intf, altsetting)))
for (j = 0; j < alt->desc.bNumEndpoints; j++)
if (alt->endpoint[j].desc.bEndpointAddress == ep)
return intf;
return NULL;
}
static int st6422_start(struct sd *sd)
{
int err, packet_size;
struct cam *cam = &sd->gspca_dev.cam;
s32 *sensor_settings = sd->sensor_priv;
struct usb_host_interface *alt;
struct usb_interface *intf;
intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
if (!alt) {
PDEBUG(D_ERR, "Couldn't get altsetting");
return -EIO;
}
packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
err = stv06xx_write_bridge(sd, 0x15c1, packet_size);
if (err < 0)
return err;
if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
else
err = stv06xx_write_bridge(sd, 0x1505, 0x02);
if (err < 0)
return err;
err = st6422_set_brightness(&sd->gspca_dev,
sensor_settings[BRIGHTNESS_IDX]);
if (err < 0)
return err;
err = st6422_set_contrast(&sd->gspca_dev,
sensor_settings[CONTRAST_IDX]);
if (err < 0)
return err;
err = st6422_set_exposure(&sd->gspca_dev,
sensor_settings[EXPOSURE_IDX]);
if (err < 0)
return err;
err = st6422_set_gain(&sd->gspca_dev,
sensor_settings[GAIN_IDX]);
if (err < 0)
return err;
PDEBUG(D_STREAM, "Starting stream");
return 0;
}
/**
* usb_reset_configuration - lightweight device reset
* @dev: the device whose configuration is being reset
*
* This issues a standard SET_CONFIGURATION request to the device using
* the current configuration. The effect is to reset most USB-related
* state in the device, including interface altsettings (reset to zero),
* endpoint halts (cleared), and data toggle (only for bulk and interrupt
* endpoints). Other usbcore state is unchanged, including bindings of
* usb device drivers to interfaces.
*
* Because this affects multiple interfaces, avoid using this with composite
* (multi-interface) devices. Instead, the driver for each interface may
* use usb_set_interface() on the interfaces it claims. Resetting the whole
* configuration would affect other drivers' interfaces.
*
* Returns zero on success, else a negative error code.
*/
int usb_reset_configuration(struct usb_device *dev)
{
int i, retval;
struct usb_host_config *config;
/* caller must own dev->serialize (config won't change)
* and the usb bus readlock (so driver bindings are stable);
* so calls during probe() are fine
*/
for (i = 1; i < 16; ++i) {
usb_disable_endpoint(dev, i);
usb_disable_endpoint(dev, i + USB_DIR_IN);
}
config = dev->actconfig;
retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0,
config->desc.bConfigurationValue, 0,
NULL, 0, HZ * USB_CTRL_SET_TIMEOUT);
if (retval < 0) {
usb_set_device_state(dev, USB_STATE_ADDRESS);
return retval;
}
dev->toggle[0] = dev->toggle[1] = 0;
dev->halted[0] = dev->halted[1] = 0;
/* re-init hc/hcd interface/endpoint state */
for (i = 0; i < config->desc.bNumInterfaces; i++) {
struct usb_interface *intf = config->interface[i];
struct usb_host_interface *alt;
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
* We could use a GetInterface call, but if a device is
* so non-compliant that it doesn't have altsetting 0
* then I wouldn't trust its reply anyway.
*/
if (!alt)
alt = &intf->altsetting[0];
intf->cur_altsetting = alt;
usb_enable_interface(dev, intf);
}
return 0;
}
static int lme2510_identify_state(struct usb_device *dev,
struct dvb_usb_device_properties *props,
struct dvb_usb_device_description **desc,
int *cold)
{
struct usb_host_interface *alt;
struct usb_host_endpoint *e;
printk("%s\n",__func__);
alt = usb_altnum_to_altsetting(usb_ifnum_to_if(dev, 0), 1);
e = alt->endpoint + 4;
if (e->desc.bmAttributes == USB_ENDPOINT_XFER_BULK)
*cold = 0;
else
*cold = 1;
mdelay(1000);
return 0;
}
static int anysee_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct dvb_usb_device *d;
struct usb_host_interface *alt;
int ret;
/* There is one interface with two alternate settings.
Alternate setting 0 is for bulk transfer.
Alternate setting 1 is for isochronous transfer.
We use bulk transfer (alternate setting 0). */
if (intf->num_altsetting < 1)
return -ENODEV;
/*
* Anysee is always warm (its USB-bridge, Cypress FX2, uploads
* firmware from eeprom). If dvb_usb_device_init() succeeds that
* means d is a valid pointer.
*/
ret = dvb_usb_device_init(intf, &anysee_properties, THIS_MODULE, &d,
adapter_nr);
if (ret)
return ret;
alt = usb_altnum_to_altsetting(intf, 0);
if (alt == NULL) {
deb_info("%s: no alt found!\n", __func__);
return -ENODEV;
}
ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
if (ret)
return ret;
return anysee_init(d);
}
/*
* usb_set_configuration - Makes a particular device setting be current
* @dev: the device whose configuration is being updated
* @configuration: the configuration being chosen.
* Context: !in_interrupt(), caller owns the device lock
*
* This is used to enable non-default device modes. Not all devices
* use this kind of configurability; many devices only have one
* configuration.
*
* @configuration is the value of the configuration to be installed.
* According to the USB spec (e.g. section 9.1.1.5), configuration values
* must be non-zero; a value of zero indicates that the device in
* unconfigured. However some devices erroneously use 0 as one of their
* configuration values. To help manage such devices, this routine will
* accept @configuration = -1 as indicating the device should be put in
* an unconfigured state.
*
* USB device configurations may affect Linux interoperability,
* power consumption and the functionality available. For example,
* the default configuration is limited to using 100mA of bus power,
* so that when certain device functionality requires more power,
* and the device is bus powered, that functionality should be in some
* non-default device configuration. Other device modes may also be
* reflected as configuration options, such as whether two ISDN
* channels are available independently; and choosing between open
* standard device protocols (like CDC) or proprietary ones.
*
* Note that USB has an additional level of device configurability,
* associated with interfaces. That configurability is accessed using
* usb_set_interface().
*
* This call is synchronous. The calling context must be able to sleep,
* must own the device lock, and must not hold the driver model's USB
* bus rwsem; usb device driver probe() methods cannot use this routine.
*
* Returns zero on success, or else the status code returned by the
* underlying call that failed. On successful completion, each interface
* in the original device configuration has been destroyed, and each one
* in the new configuration has been probed by all relevant usb device
* drivers currently known to the kernel.
*/
int usb_set_configuration(struct usb_device *dev, int configuration)
{
int i, ret;
struct usb_host_config *cp = NULL;
struct usb_interface **new_interfaces = NULL;
int n, nintf;
if (configuration == -1)
configuration = 0;
else {
for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
if (dev->config[i].desc.bConfigurationValue ==
configuration) {
cp = &dev->config[i];
break;
}
}
}
if ((!cp && configuration != 0))
return -EINVAL;
/* The USB spec says configuration 0 means unconfigured.
* But if a device includes a configuration numbered 0,
* we will accept it as a correctly configured state.
* Use -1 if you really want to unconfigure the device.
*/
if (cp && configuration == 0)
dev_warn(&dev->dev, "config 0 descriptor??\n");
/* Allocate memory for new interfaces before doing anything else,
* so that if we run out then nothing will have changed. */
n = nintf = 0;
if (cp) {
nintf = cp->desc.bNumInterfaces;
new_interfaces = kmalloc(nintf * sizeof(*new_interfaces),
GFP_KERNEL);
if (!new_interfaces) {
dev_err(&dev->dev, "Out of memory");
return -ENOMEM;
}
for (; n < nintf; ++n) {
new_interfaces[n] = kzalloc(
sizeof(struct usb_interface),
GFP_KERNEL);
if (!new_interfaces[n]) {
dev_err(&dev->dev, "Out of memory");
ret = -ENOMEM;
free_interfaces:
while (--n >= 0)
kfree(new_interfaces[n]);
kfree(new_interfaces);
return ret;
}
}
i = dev->bus_mA - cp->desc.bMaxPower * 2;
if (i < 0)
dev_warn(&dev->dev, "new config #%d exceeds power "
"limit by %dmA\n",
configuration, -i);
}
/* Wake up the device so we can send it the Set-Config request */
ret = usb_autoresume_device(dev);
if (ret)
goto free_interfaces;
/* if it's already configured, clear out old state first.
* getting rid of old interfaces means unbinding their drivers.
*/
if (dev->state != USB_STATE_ADDRESS)
usb_disable_device (dev, 1); // Skip ep0
if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT)) < 0) {
/* All the old state is gone, so what else can we do?
* The device is probably useless now anyway.
*/
cp = NULL;
}
dev->actconfig = cp;
if (!cp) {
usb_set_device_state(dev, USB_STATE_ADDRESS);
usb_autosuspend_device(dev);
goto free_interfaces;
}
usb_set_device_state(dev, USB_STATE_CONFIGURED);
/* Initialize the new interface structures and the
* hc/hcd/usbcore interface/endpoint state.
*/
for (i = 0; i < nintf; ++i) {
struct usb_interface_cache *intfc;
struct usb_interface *intf;
struct usb_host_interface *alt;
cp->interface[i] = intf = new_interfaces[i];
intfc = cp->intf_cache[i];
intf->altsetting = intfc->altsetting;
intf->num_altsetting = intfc->num_altsetting;
kref_get(&intfc->ref);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
* We could use a GetInterface call, but if a device is
* so non-compliant that it doesn't have altsetting 0
* then I wouldn't trust its reply anyway.
*/
if (!alt)
alt = &intf->altsetting[0];
intf->cur_altsetting = alt;
usb_enable_interface(dev, intf);
intf->dev.parent = &dev->dev;
intf->dev.driver = NULL;
intf->dev.bus = &usb_bus_type;
intf->dev.dma_mask = dev->dev.dma_mask;
intf->dev.release = release_interface;
device_initialize (&intf->dev);
mark_quiesced(intf);
sprintf (&intf->dev.bus_id[0], "%d-%s:%d.%d",
dev->bus->busnum, dev->devpath,
configuration, alt->desc.bInterfaceNumber);
}
kfree(new_interfaces);
if (cp->string == NULL)
cp->string = usb_cache_string(dev, cp->desc.iConfiguration);
/* Now that all the interfaces are set up, register them
* to trigger binding of drivers to interfaces. probe()
* routines may install different altsettings and may
* claim() any interfaces not yet bound. Many class drivers
* need that: CDC, audio, video, etc.
*/
for (i = 0; i < nintf; ++i) {
struct usb_interface *intf = cp->interface[i];
dev_dbg (&dev->dev,
"adding %s (config #%d, interface %d)\n",
intf->dev.bus_id, configuration,
intf->cur_altsetting->desc.bInterfaceNumber);
ret = device_add (&intf->dev);
if (ret != 0) {
dev_err(&dev->dev, "device_add(%s) --> %d\n",
intf->dev.bus_id, ret);
continue;
}
usb_create_sysfs_intf_files (intf);
}
usb_autosuspend_device(dev);
return 0;
}
/**ltl
功能:设置usb设备的配置，并且加载与接口相关的驱动程序
参数:dev ->usb设备
configuration ->usb配置编号
返回值:
说明:调用这个接口,usb设备才会进入配置阶段
*/
int usb_set_configuration(struct usb_device *dev, int configuration)
{
int i, ret;
struct usb_host_config *cp = NULL;
struct usb_interface **new_interfaces = NULL;
int n, nintf;
for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
if (dev->config[i].desc.bConfigurationValue == configuration) {
cp = &dev->config[i];
break;
}
}
if ((!cp && configuration != 0))
return -EINVAL;
/* The USB spec says configuration 0 means unconfigured.
* But if a device includes a configuration numbered 0,
* we will accept it as a correctly configured state.
*/
if (cp && configuration == 0)
dev_warn(&dev->dev, "config 0 descriptor??\n");
if (dev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
/* Allocate memory for new interfaces before doing anything else,
* so that if we run out then nothing will have changed. */
n = nintf = 0;
if (cp) {
nintf = cp->desc.bNumInterfaces;//接口数量
new_interfaces = kmalloc(nintf * sizeof(*new_interfaces),
GFP_KERNEL);
if (!new_interfaces) {
dev_err(&dev->dev, "Out of memory");
return -ENOMEM;
}
for (; n < nintf; ++n) {
new_interfaces[n] = kzalloc(
sizeof(struct usb_interface),
GFP_KERNEL);
if (!new_interfaces[n]) {
dev_err(&dev->dev, "Out of memory");
ret = -ENOMEM;
free_interfaces:
while (--n >= 0)
kfree(new_interfaces[n]);
kfree(new_interfaces);
return ret;
}
}
i = dev->bus_mA - cp->desc.bMaxPower * 2;
if (i < 0)
dev_warn(&dev->dev, "new config #%d exceeds power "
"limit by %dmA\n",
configuration, -i);
}
/* if it's already configured, clear out old state first.
* getting rid of old interfaces means unbinding their drivers.
*/
if (dev->state != USB_STATE_ADDRESS)
usb_disable_device (dev, 1); // Skip ep0
//设置配置编号
if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT)) < 0) {
/* All the old state is gone, so what else can we do?
* The device is probably useless now anyway.
*/
cp = NULL;
}
//当前的配置对象
dev->actconfig = cp;
if (!cp) {
usb_set_device_state(dev, USB_STATE_ADDRESS);
goto free_interfaces;
}
usb_set_device_state(dev, USB_STATE_CONFIGURED);
/* Initialize the new interface structures and the
* hc/hcd/usbcore interface/endpoint state.
*/
//对interface对象赋值
for (i = 0; i < nintf; ++i) {
struct usb_interface_cache *intfc;
struct usb_interface *intf;
struct usb_host_interface *alt;
cp->interface[i] = intf = new_interfaces[i];
intfc = cp->intf_cache[i];
intf->altsetting = intfc->altsetting;
intf->num_altsetting = intfc->num_altsetting;
kref_get(&intfc->ref);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
* We could use a GetInterface call, but if a device is
* so non-compliant that it doesn't have altsetting 0
* then I wouldn't trust its reply anyway.
*/
if (!alt)
alt = &intf->altsetting[0];
intf->cur_altsetting = alt;
usb_enable_interface(dev, intf);
intf->dev.parent = &dev->dev;
intf->dev.driver = NULL;
/*总线驱动模型中，interface作为设备，如果interface是一个usb hub(bInterfaceClass=9)，则按总线驱动模型，就会匹配hub_driver驱动，调用device_add后，
最后调用hub_probe,去 分配usb_hub对象，并为每个hub关联中断处理函数，当hub端口中有设备插入时，hub产生
一中断hub_irq,最终唤醒线程hub_thread,然后为usb设备分配设备号(hub_port_connect_change)
;如果interface是一个usb设备(bInterfaceClass=x)，比如:usbmouse,此时会去匹配usb_mouse_driver。
*/
intf->dev.bus = &usb_bus_type;
intf->dev.dma_mask = dev->dev.dma_mask;
intf->dev.release = release_interface;
device_initialize (&intf->dev);
mark_quiesced(intf);
sprintf (&intf->dev.bus_id[0], "%d-%s:%d.%d",
dev->bus->busnum, dev->devpath,
configuration, alt->desc.bInterfaceNumber);
}
kfree(new_interfaces);
if (cp->string == NULL)
cp->string = usb_cache_string(dev, cp->desc.iConfiguration);
/* Now that all the interfaces are set up, register them
* to trigger binding of drivers to interfaces. probe()
* routines may install different altsettings and may
* claim() any interfaces not yet bound. Many class drivers
* need that: CDC, audio, video, etc.
*/
/*每个接口代表一个功能，每个接口都有一个驱动程序，载之*/
for (i = 0; i < nintf; ++i) {
struct usb_interface *intf = cp->interface[i];
dev_dbg (&dev->dev,
"adding %s (config #%d, interface %d)\n",
intf->dev.bus_id, configuration,
intf->cur_altsetting->desc.bInterfaceNumber);
//执行后，设备驱动将执行探针接口:hub_probe,storage_probe
ret = device_add (&intf->dev);
if (ret != 0) {
dev_err(&dev->dev, "device_add(%s) --> %d\n",
intf->dev.bus_id, ret);
continue;
}
usb_create_sysfs_intf_files (intf);
}
return 0;
}
static int raidb0mb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
raidb0mb_device *dev;
struct usb_device * udev;
struct usb_host_interface * hintf;
struct usb_endpoint_descriptor * endp;
struct net_device * netdev;
raidb0mb_bullet * bull;
int i, retval, t;
udev = interface_to_usbdev(intf);
netdev = alloc_etherdev(sizeof(raidb0mb_device));
if (!netdev) {
return -ENOMEM;
}
netdev->netdev_ops = &raidb0mb_netdev_ops;
netdev->watchdog_timeo = IPHETH_TX_TIMEOUT;
strcpy(netdev->name, "eth%d");
dev = netdev_priv(netdev);
dev->udev = udev;
dev->net = netdev;
dev->intf = intf;
/* Set up endpoints */
hintf = usb_altnum_to_altsetting(intf, IPHETH_ALT_INTFNUM);
if (hintf == NULL) {
retval = -ENODEV;
dev_err(&intf->dev, "Unable to find alternate settings interface\n");
goto err_endpoints;
}
for (i=0;i<hintf->desc.bNumEndpoints;i++) {
endp = &hintf->endpoint[i].desc;
if (usb_endpoint_is_bulk_in(endp)) {
dev->bulk_in = endp->bEndpointAddress;
} else if (usb_endpoint_is_bulk_out(endp)) {
dev->bulk_out = endp->bEndpointAddress;
}
}
if (!(dev->bulk_in && dev->bulk_out)) {
retval = -ENODEV;
dev_err(&intf->dev, "Unable to find endpoints\n");
goto err_endpoints;
}
dev->ctrl_buf = kmalloc(IPHETH_CTRL_BUF_SIZE, GFP_KERNEL);
if (dev->ctrl_buf == NULL) {
retval = -ENOMEM;
goto err_alloc_ctrl_buf;
}
retval = raidb0mb_get_macaddr(dev);
if (retval) {
goto err_get_macaddr;
}
bull = kmalloc(sizeof(raidb0mb_bullet), GFP_KERNEL);
for (t=0;t<=255;t++)
{
bull->req = t;
dev_info(&intf->dev, "Round %d\n", t);
bull->req_type = 0xc0;
bull->val = 0x00;
bull->index = 0x02;
retval = raidb0mb_send_command(dev, bull);
}
INIT_DELAYED_WORK(&dev->carrier_work, raidb0mb_carrier_check_work);
retval = raidb0mb_alloc_urbs(dev);
if (retval) {
dev_err(&intf->dev, "error allocating urbs: %d\n", retval);
goto err_alloc_urbs;
}
/*
usb_set_intfdata(intf, dev);
SET_NETDEV_DEV(netdev, &intf->dev);
SET_ETHTOOL_OPS(netdev, &ops);
retval = register_netdev(netdev);
if (retval) {
dev_err(&intf->dev, "error registering netdev: %d\n", retval);
retval = -EIO;
goto err_register_netdev;
}
*/
dev_info(&intf->dev, "Apple iPhone USB Ethernet device attached\n");
return 0;
err_register_netdev:
raidb0mb_free_urbs(dev);
err_alloc_urbs:
err_get_macaddr:
err_alloc_ctrl_buf:
kfree(dev->ctrl_buf);
err_endpoints:
free_netdev(netdev);
return retval;
}
static int ipheth_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_host_interface *hintf;
struct usb_endpoint_descriptor *endp;
struct ipheth_device *dev;
struct net_device *netdev;
int i;
int retval;
netdev = alloc_etherdev(sizeof(struct ipheth_device));
if (!netdev)
return -ENOMEM;
netdev->netdev_ops = &ipheth_netdev_ops;
netdev->watchdog_timeo = IPHETH_TX_TIMEOUT;
strcpy(netdev->name, "eth%d");
dev = netdev_priv(netdev);
dev->udev = udev;
dev->net = netdev;
dev->intf = intf;
dev->confirmed_pairing = false;
/* Set up endpoints */
hintf = usb_altnum_to_altsetting(intf, IPHETH_ALT_INTFNUM);
if (hintf == NULL) {
retval = -ENODEV;
dev_err(&intf->dev, "Unable to find alternate settings interface\n");
goto err_endpoints;
}
for (i = 0; i < hintf->desc.bNumEndpoints; i++) {
endp = &hintf->endpoint[i].desc;
if (usb_endpoint_is_bulk_in(endp))
dev->bulk_in = endp->bEndpointAddress;
else if (usb_endpoint_is_bulk_out(endp))
dev->bulk_out = endp->bEndpointAddress;
}
if (!(dev->bulk_in && dev->bulk_out)) {
retval = -ENODEV;
dev_err(&intf->dev, "Unable to find endpoints\n");
goto err_endpoints;
}
dev->ctrl_buf = kmalloc(IPHETH_CTRL_BUF_SIZE, GFP_KERNEL);
if (dev->ctrl_buf == NULL) {
retval = -ENOMEM;
goto err_alloc_ctrl_buf;
}
retval = ipheth_get_macaddr(dev);
if (retval)
goto err_get_macaddr;
INIT_DELAYED_WORK(&dev->carrier_work, ipheth_carrier_check_work);
retval = ipheth_alloc_urbs(dev);
if (retval) {
dev_err(&intf->dev, "error allocating urbs: %d\n", retval);
goto err_alloc_urbs;
}
usb_set_intfdata(intf, dev);
SET_NETDEV_DEV(netdev, &intf->dev);
netdev->ethtool_ops = &ops;
retval = register_netdev(netdev);
if (retval) {
dev_err(&intf->dev, "error registering netdev: %d\n", retval);
retval = -EIO;
goto err_register_netdev;
}
// carrier down and transmit queues stopped until packet from device
netif_carrier_off(netdev);
netif_tx_stop_all_queues(netdev);
dev_info(&intf->dev, "Apple iPhone USB Ethernet device attached\n");
return 0;
err_register_netdev:
ipheth_free_urbs(dev);
err_alloc_urbs:
err_get_macaddr:
err_alloc_ctrl_buf:
kfree(dev->ctrl_buf);
err_endpoints:
free_netdev(netdev);
return retval;
}
static int ipheth_probe (struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_host_interface *hintf;
struct usb_endpoint_descriptor *endp;
struct ipheth_device *dev;
struct net_device *netdev;
int i;
int retval;
/* Ensure we are probing the right interface */
if (intf->cur_altsetting->desc.bInterfaceClass != IPHETH_USBINTF_CLASS ||
intf->cur_altsetting->desc.bInterfaceSubClass != IPHETH_USBINTF_SUBCLASS)
return -ENODEV;
netdev = alloc_etherdev(sizeof(struct ipheth_device));
if (!netdev)
return -ENOMEM;
#ifdef HAVE_NET_DEVICE_OPS
netdev->netdev_ops = &ipheth_netdev_ops;
#else /* CONFIG_COMPAT_NET_DEV_OPS */
netdev->open = &ipheth_open;
netdev->stop = &ipheth_close;
netdev->hard_start_xmit = &ipheth_tx;
netdev->tx_timeout = &ipheth_tx_timeout;
netdev->get_stats = &ipheth_stats;
#endif
netdev->watchdog_timeo = IPHETH_TX_TIMEOUT;
dev = netdev_priv(netdev);
dev->udev = udev;
dev->net = netdev;
dev->intf = intf;
/* Set up endpoints */
hintf = usb_altnum_to_altsetting (intf, IPHETH_ALT_INTFNUM);
if (hintf == NULL) {
retval = -ENODEV;
err("Unable to find alternate settings interface");
goto err_endpoints;
}
for (i = 0; i < hintf->desc.bNumEndpoints; i++) {
endp = &hintf->endpoint[i].desc;
if (usb_endpoint_is_bulk_in(endp))
dev->bulk_in = endp->bEndpointAddress;
else if (usb_endpoint_is_bulk_out(endp))
dev->bulk_out = endp->bEndpointAddress;
}
if (!(dev->bulk_in && dev->bulk_out)) {
retval = -ENODEV;
err("Unable to find endpoints");
goto err_endpoints;
}
dev->ctrl_buf = kmalloc(IPHETH_CTRL_BUF_SIZE, GFP_KERNEL);
if (dev->ctrl_buf == NULL) {
retval = -ENOMEM;
goto err_alloc_ctrl_buf;
}
if ((retval = ipheth_get_macaddr(dev)))
goto err_get_macaddr;
INIT_DELAYED_WORK(&dev->carrier_work, ipheth_carrier_check_work);
if ((retval = ipheth_alloc_urbs(dev))) {
err("error allocating urbs: %d", retval);
goto err_alloc_urbs;
}
usb_set_intfdata(intf, dev);
SET_NETDEV_DEV(netdev, &intf->dev);
SET_ETHTOOL_OPS(netdev, &ops);
if ((retval = register_netdev(netdev))) {
err("error registering netdev: %d", retval);
retval = -EIO;
goto err_register_netdev;
}
dev_info(&intf->dev, "Apple iPhone USB Ethernet device attached\n");
return 0;
err_register_netdev:
ipheth_free_urbs(dev);
err_alloc_urbs:
err_get_macaddr:
err_alloc_ctrl_buf:
kfree(dev->ctrl_buf);
err_endpoints:
free_netdev(netdev);
return retval;
}
int st5481_setup_usb(struct st5481_adapter *adapter)
{
struct usb_device *dev = adapter->usb_dev;
struct st5481_ctrl *ctrl = &adapter->ctrl;
struct st5481_intr *intr = &adapter->intr;
struct usb_interface *intf;
struct usb_host_interface *altsetting = NULL;
struct usb_host_endpoint *endpoint;
int status;
struct urb *urb;
u8 *buf;
DBG(2,"");
if ((status = usb_reset_configuration (dev)) < 0) {
WARNING("reset_configuration failed,status=%d",status);
return status;
}
intf = usb_ifnum_to_if(dev, 0);
if (intf)
altsetting = usb_altnum_to_altsetting(intf, 3);
if (!altsetting)
return -ENXIO;
// Check if the config is sane
if ( altsetting->desc.bNumEndpoints != 7 ) {
WARNING("expecting 7 got %d endpoints!", altsetting->desc.bNumEndpoints);
return -EINVAL;
}
// The descriptor is wrong for some early samples of the ST5481 chip
altsetting->endpoint[3].desc.wMaxPacketSize = __constant_cpu_to_le16(32);
altsetting->endpoint[4].desc.wMaxPacketSize = __constant_cpu_to_le16(32);
// Use alternative setting 3 on interface 0 to have 2B+D
if ((status = usb_set_interface (dev, 0, 3)) < 0) {
WARNING("usb_set_interface failed,status=%d",status);
return status;
}
// Allocate URB for control endpoint
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
return -ENOMEM;
}
ctrl->urb = urb;
// Fill the control URB
usb_fill_control_urb (urb, dev,
usb_sndctrlpipe(dev, 0),
NULL, NULL, 0, usb_ctrl_complete, adapter);
fifo_init(&ctrl->msg_fifo.f, ARRAY_SIZE(ctrl->msg_fifo.data));
// Allocate URBs and buffers for interrupt endpoint
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
return -ENOMEM;
}
intr->urb = urb;
buf = kmalloc(INT_PKT_SIZE, GFP_KERNEL);
if (!buf) {
return -ENOMEM;
}
endpoint = &altsetting->endpoint[EP_INT-1];
// Fill the interrupt URB
usb_fill_int_urb(urb, dev,
usb_rcvintpipe(dev, endpoint->desc.bEndpointAddress),
buf, INT_PKT_SIZE,
usb_int_complete, adapter,
endpoint->desc.bInterval);
return 0;
}
/*
* usb_set_configuration - Makes a particular device setting be current
* @dev: the device whose configuration is being updated
* @configuration: the configuration being chosen.
* Context: !in_interrupt(), caller holds dev->serialize
*
* This is used to enable non-default device modes. Not all devices
* use this kind of configurability; many devices only have one
* configuration.
*
* USB device configurations may affect Linux interoperability,
* power consumption and the functionality available. For example,
* the default configuration is limited to using 100mA of bus power,
* so that when certain device functionality requires more power,
* and the device is bus powered, that functionality should be in some
* non-default device configuration. Other device modes may also be
* reflected as configuration options, such as whether two ISDN
* channels are available independently; and choosing between open
* standard device protocols (like CDC) or proprietary ones.
*
* Note that USB has an additional level of device configurability,
* associated with interfaces. That configurability is accessed using
* usb_set_interface().
*
* This call is synchronous. The calling context must be able to sleep,
* and must not hold the driver model lock for USB; usb device driver
* probe() methods may not use this routine.
*
* Returns zero on success, or else the status code returned by the
* underlying call that failed. On succesful completion, each interface
* in the original device configuration has been destroyed, and each one
* in the new configuration has been probed by all relevant usb device
* drivers currently known to the kernel.
*/
int usb_set_configuration(struct usb_device *dev, int configuration)
{
int i, ret;
struct usb_host_config *cp = NULL;
struct usb_interface **new_interfaces = NULL;
int n, nintf;
/* dev->serialize guards all config changes */
for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
if (dev->config[i].desc.bConfigurationValue == configuration) {
cp = &dev->config[i];
break;
}
}
if ((!cp && configuration != 0))
return -EINVAL;
/* The USB spec says configuration 0 means unconfigured.
* But if a device includes a configuration numbered 0,
* we will accept it as a correctly configured state.
*/
if (cp && configuration == 0)
dev_warn(&dev->dev, "config 0 descriptor??\n");
/* Allocate memory for new interfaces before doing anything else,
* so that if we run out then nothing will have changed. */
n = nintf = 0;
if (cp) {
nintf = cp->desc.bNumInterfaces;
new_interfaces = kmalloc(nintf * sizeof(*new_interfaces),
GFP_KERNEL);
if (!new_interfaces) {
dev_err(&dev->dev, "Out of memory");
return -ENOMEM;
}
for (; n < nintf; ++n) {
new_interfaces[n] = kmalloc(
sizeof(struct usb_interface),
GFP_KERNEL);
if (!new_interfaces[n]) {
dev_err(&dev->dev, "Out of memory");
ret = -ENOMEM;
free_interfaces:
while (--n >= 0)
kfree(new_interfaces[n]);
kfree(new_interfaces);
return ret;
}
}
}
/* if it's already configured, clear out old state first.
* getting rid of old interfaces means unbinding their drivers.
*/
if (dev->state != USB_STATE_ADDRESS)
usb_disable_device (dev, 1); // Skip ep0
if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
NULL, 0, HZ * USB_CTRL_SET_TIMEOUT)) < 0)
goto free_interfaces;
dev->actconfig = cp;
if (!cp)
usb_set_device_state(dev, USB_STATE_ADDRESS);
else {
usb_set_device_state(dev, USB_STATE_CONFIGURED);
/*Êý¾Ý¿¨²åÈëÍø¹Ø¼ì²âl65130 2008-09-20 start*/
if (0x12d1 == dev->descriptor.idVendor && !g_iDataCardIn)
{
g_iDataCardIn = 1;
}
/*Êý¾Ý¿¨²åÈëÍø¹Ø¼ì²âl65130 2008-09-20 end*/
/* Initialize the new interface structures and the
* hc/hcd/usbcore interface/endpoint state.
*/
for (i = 0; i < nintf; ++i) {
struct usb_interface_cache *intfc;
struct usb_interface *intf;
struct usb_host_interface *alt;
cp->interface[i] = intf = new_interfaces[i];
memset(intf, 0, sizeof(*intf));
intfc = cp->intf_cache[i];
intf->altsetting = intfc->altsetting;
intf->num_altsetting = intfc->num_altsetting;
kref_get(&intfc->ref);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
* We could use a GetInterface call, but if a device is
* so non-compliant that it doesn't have altsetting 0
* then I wouldn't trust its reply anyway.
*/
if (!alt)
alt = &intf->altsetting[0];
intf->cur_altsetting = alt;
usb_enable_interface(dev, intf);
intf->dev.parent = &dev->dev;
intf->dev.driver = NULL;
intf->dev.bus = &usb_bus_type;
intf->dev.dma_mask = dev->dev.dma_mask;
intf->dev.release = release_interface;
device_initialize (&intf->dev);
sprintf (&intf->dev.bus_id[0], "%d-%s:%d.%d",
dev->bus->busnum, dev->devpath,
configuration,
alt->desc.bInterfaceNumber);
}
kfree(new_interfaces);
/* Now that all the interfaces are set up, register them
* to trigger binding of drivers to interfaces. probe()
* routines may install different altsettings and may
* claim() any interfaces not yet bound. Many class drivers
* need that: CDC, audio, video, etc.
*/
for (i = 0; i < nintf; ++i) {
struct usb_interface *intf = cp->interface[i];
struct usb_interface_descriptor *desc;
desc = &intf->altsetting [0].desc;
dev_dbg (&dev->dev,
"adding %s (config #%d, interface %d)\n",
intf->dev.bus_id, configuration,
desc->bInterfaceNumber);
ret = device_add (&intf->dev);
if (ret != 0) {
dev_err(&dev->dev,
"device_add(%s) --> %d\n",
intf->dev.bus_id,
ret);
continue;
}
usb_create_sysfs_intf_files (intf);
}
}
return ret;
}
/**
* usb_set_interface - Makes a particular alternate setting be current
* @dev: the device whose interface is being updated
* @interface: the interface being updated
* @alternate: the setting being chosen.
* Context: !in_interrupt ()
*
* This is used to enable data transfers on interfaces that may not
* be enabled by default. Not all devices support such configurability.
* Only the driver bound to an interface may change its setting.
*
* Within any given configuration, each interface may have several
* alternative settings. These are often used to control levels of
* bandwidth consumption. For example, the default setting for a high
* speed interrupt endpoint may not send more than 64 bytes per microframe,
* while interrupt transfers of up to 3KBytes per microframe are legal.
* Also, isochronous endpoints may never be part of an
* interface's default setting. To access such bandwidth, alternate
* interface settings must be made current.
*
* Note that in the Linux USB subsystem, bandwidth associated with
* an endpoint in a given alternate setting is not reserved until an URB
* is submitted that needs that bandwidth. Some other operating systems
* allocate bandwidth early, when a configuration is chosen.
*
* This call is synchronous, and may not be used in an interrupt context.
* Also, drivers must not change altsettings while urbs are scheduled for
* endpoints in that interface; all such urbs must first be completed
* (perhaps forced by unlinking).
*
* Returns zero on success, or else the status code returned by the
* underlying usb_control_msg() call.
*/
int usb_set_interface(struct usb_device *dev, int interface, int alternate)
{
struct usb_interface *iface;
struct usb_host_interface *alt;
int ret;
int manual = 0;
iface = usb_ifnum_to_if(dev, interface);
if (!iface) {
dev_dbg(&dev->dev, "selecting invalid interface %d\n",
interface);
return -EINVAL;
}
alt = usb_altnum_to_altsetting(iface, alternate);
if (!alt) {
warn("selecting invalid altsetting %d", alternate);
return -EINVAL;
}
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
alternate, interface, NULL, 0, HZ * 5);
/* 9.4.10 says devices don't need this and are free to STALL the
* request if the interface only has one alternate setting.
*/
if (ret == -EPIPE && iface->num_altsetting == 1) {
dev_dbg(&dev->dev,
"manual set_interface for iface %d, alt %d\n",
interface, alternate);
manual = 1;
} else if (ret < 0)
return ret;
/* FIXME drivers shouldn't need to replicate/bugfix the logic here
* when they implement async or easily-killable versions of this or
* other "should-be-internal" functions (like clear_halt).
* should hcd+usbcore postprocess control requests?
*/
/* prevent submissions using previous endpoint settings */
usb_disable_interface(dev, iface);
iface->cur_altsetting = alt;
/* If the interface only has one altsetting and the device didn't
* accept the request, we attempt to carry out the equivalent action
* by manually clearing the HALT feature for each endpoint in the
* new altsetting.
*/
if (manual) {
int i;
for (i = 0; i < alt->desc.bNumEndpoints; i++) {
unsigned int epaddr =
alt->endpoint[i].desc.bEndpointAddress;
unsigned int pipe =
__create_pipe(dev, USB_ENDPOINT_NUMBER_MASK & epaddr)
| (usb_endpoint_out(epaddr) ? USB_DIR_OUT : USB_DIR_IN);
usb_clear_halt(dev, pipe);
}
}
/* 9.1.1.5: reset toggles for all endpoints in the new altsetting
*
* Note:
* Despite EP0 is always present in all interfaces/AS, the list of
* endpoints from the descriptor does not contain EP0. Due to its
* omnipresence one might expect EP0 being considered "affected" by
* any SetInterface request and hence assume toggles need to be reset.
* However, EP0 toggles are re-synced for every individual transfer
* during the SETUP stage - hence EP0 toggles are "don't care" here.
* (Likewise, EP0 never "halts" on well designed devices.)
*/
usb_enable_interface(dev, iface);
return 0;
}
static int konicawc_start_data(struct uvd *uvd)
{
struct usb_device *dev = uvd->dev;
int i, errFlag;
struct konicawc *cam = (struct konicawc *)uvd->user_data;
int pktsz;
struct usb_interface *intf;
struct usb_host_interface *interface = NULL;
intf = usb_ifnum_to_if(dev, uvd->iface);
if (intf)
interface = usb_altnum_to_altsetting(intf,
spd_to_iface[cam->speed]);
if (!interface)
return -ENXIO;
pktsz = le16_to_cpu(interface->endpoint[1].desc.wMaxPacketSize);
DEBUG(1, "pktsz = %d", pktsz);
if (!CAMERA_IS_OPERATIONAL(uvd)) {
err("Camera is not operational");
return -EFAULT;
}
uvd->curframe = -1;
konicawc_camera_on(uvd);
/* Alternate interface 1 is is the biggest frame size */
i = usb_set_interface(dev, uvd->iface, uvd->ifaceAltActive);
if (i < 0) {
err("usb_set_interface error");
uvd->last_error = i;
return -EBUSY;
}
/* We double buffer the Iso lists */
for (i=0; i < USBVIDEO_NUMSBUF; i++) {
int j, k;
struct urb *urb = uvd->sbuf[i].urb;
urb->dev = dev;
urb->context = uvd;
urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp);
urb->interval = 1;
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = uvd->sbuf[i].data;
urb->complete = konicawc_isoc_irq;
urb->number_of_packets = FRAMES_PER_DESC;
urb->transfer_buffer_length = pktsz * FRAMES_PER_DESC;
for (j=k=0; j < FRAMES_PER_DESC; j++, k += pktsz) {
urb->iso_frame_desc[j].offset = k;
urb->iso_frame_desc[j].length = pktsz;
}
urb = cam->sts_urb[i];
urb->dev = dev;
urb->context = uvd;
urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp-1);
urb->interval = 1;
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = cam->sts_buf[i];
urb->complete = konicawc_isoc_irq;
urb->number_of_packets = FRAMES_PER_DESC;
urb->transfer_buffer_length = FRAMES_PER_DESC;
for (j=0; j < FRAMES_PER_DESC; j++) {
urb->iso_frame_desc[j].offset = j;
urb->iso_frame_desc[j].length = 1;
}
}
cam->last_data_urb = NULL;
/* Submit all URBs */
for (i=0; i < USBVIDEO_NUMSBUF; i++) {
errFlag = usb_submit_urb(cam->sts_urb[i], GFP_KERNEL);
if (errFlag)
err("usb_submit_isoc(%d) ret %d", i, errFlag);
errFlag = usb_submit_urb(uvd->sbuf[i].urb, GFP_KERNEL);
if (errFlag)
err ("usb_submit_isoc(%d) ret %d", i, errFlag);
}
uvd->streaming = 1;
DEBUG(1, "streaming=1 video_endp=$%02x", uvd->video_endp);
return 0;
}
/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
static int pwc_isoc_init(struct pwc_device *pdev)
{
struct usb_device *udev;
struct urb *urb;
int i, j, ret;
struct usb_interface *intf;
struct usb_host_interface *idesc = NULL;
int compression = 0; /* 0..3 = uncompressed..high */
pdev->vsync = 0;
pdev->vlast_packet_size = 0;
pdev->fill_buf = NULL;
pdev->vframe_count = 0;
pdev->visoc_errors = 0;
udev = pdev->udev;
retry:
/* We first try with low compression and then retry with a higher
compression setting if there is not enough bandwidth. */
ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, pdev->pixfmt,
pdev->vframes, &compression, 1);
/* Get the current alternate interface, adjust packet size */
intf = usb_ifnum_to_if(udev, 0);
if (intf)
idesc = usb_altnum_to_altsetting(intf, pdev->valternate);
if (!idesc)
return -EIO;
/* Search video endpoint */
pdev->vmax_packet_size = -1;
for (i = 0; i < idesc->desc.bNumEndpoints; i++) {
if ((idesc->endpoint[i].desc.bEndpointAddress & 0xF) == pdev->vendpoint) {
pdev->vmax_packet_size = le16_to_cpu(idesc->endpoint[i].desc.wMaxPacketSize);
break;
}
}
if (pdev->vmax_packet_size < 0 || pdev->vmax_packet_size > ISO_MAX_FRAME_SIZE) {
PWC_ERROR("Failed to find packet size for video endpoint in current alternate setting.\n");
return -ENFILE; /* Odd error, that should be noticeable */
}
/* Set alternate interface */
PWC_DEBUG_OPEN("Setting alternate interface %d\n", pdev->valternate);
ret = usb_set_interface(pdev->udev, 0, pdev->valternate);
if (ret == -ENOSPC && compression < 3) {
compression++;
goto retry;
}
if (ret < 0)
return ret;
/* Allocate and init Isochronuous urbs */
for (i = 0; i < MAX_ISO_BUFS; i++) {
urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
if (urb == NULL) {
PWC_ERROR("Failed to allocate urb %d\n", i);
pwc_isoc_cleanup(pdev);
return -ENOMEM;
}
pdev->urbs[i] = urb;
PWC_DEBUG_MEMORY("Allocated URB at 0x%p\n", urb);
urb->interval = 1; // devik
urb->dev = udev;
urb->pipe = usb_rcvisocpipe(udev, pdev->vendpoint);
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
urb->transfer_buffer = usb_alloc_coherent(udev,
ISO_BUFFER_SIZE,
GFP_KERNEL,
&urb->transfer_dma);
if (urb->transfer_buffer == NULL) {
PWC_ERROR("Failed to allocate urb buffer %d\n", i);
pwc_isoc_cleanup(pdev);
return -ENOMEM;
}
urb->transfer_buffer_length = ISO_BUFFER_SIZE;
urb->complete = pwc_isoc_handler;
urb->context = pdev;
urb->start_frame = 0;
urb->number_of_packets = ISO_FRAMES_PER_DESC;
for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
urb->iso_frame_desc[j].length = pdev->vmax_packet_size;
}
}
/* link */
for (i = 0; i < MAX_ISO_BUFS; i++) {
ret = usb_submit_urb(pdev->urbs[i], GFP_KERNEL);
if (ret == -ENOSPC && compression < 3) {
compression++;
pwc_isoc_cleanup(pdev);
goto retry;
}
if (ret) {
PWC_ERROR("isoc_init() submit_urb %d failed with error %d\n", i, ret);
pwc_isoc_cleanup(pdev);
return ret;
}
PWC_DEBUG_MEMORY("URB 0x%p submitted.\n", pdev->urbs[i]);
}
/* All is done... */
PWC_DEBUG_OPEN("<< pwc_isoc_init()\n");
return 0;
}
int st5481_setup_usb(struct st5481_adapter *adapter)
{
struct usb_device *dev = adapter->usb_dev;
struct st5481_ctrl *ctrl = &adapter->ctrl;
struct st5481_intr *intr = &adapter->intr;
struct usb_interface *intf;
struct usb_host_interface *altsetting = NULL;
struct usb_host_endpoint *endpoint;
int status;
struct urb *urb;
u8 *buf;
DBG(2, "");
if ((status = usb_reset_configuration(dev)) < 0) {
WARNING("reset_configuration failed,status=%d", status);
return status;
}
intf = usb_ifnum_to_if(dev, 0);
if (intf)
altsetting = usb_altnum_to_altsetting(intf, 3);
if (!altsetting)
return -ENXIO;
if (altsetting->desc.bNumEndpoints != 7) {
WARNING("expecting 7 got %d endpoints!", altsetting->desc.bNumEndpoints);
return -EINVAL;
}
altsetting->endpoint[3].desc.wMaxPacketSize = __constant_cpu_to_le16(32);
altsetting->endpoint[4].desc.wMaxPacketSize = __constant_cpu_to_le16(32);
if ((status = usb_set_interface(dev, 0, 3)) < 0) {
WARNING("usb_set_interface failed,status=%d", status);
return status;
}
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
return -ENOMEM;
}
ctrl->urb = urb;
usb_fill_control_urb(urb, dev,
usb_sndctrlpipe(dev, 0),
NULL, NULL, 0, usb_ctrl_complete, adapter);
fifo_init(&ctrl->msg_fifo.f, ARRAY_SIZE(ctrl->msg_fifo.data));
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
return -ENOMEM;
}
intr->urb = urb;
buf = kmalloc(INT_PKT_SIZE, GFP_KERNEL);
if (!buf) {
return -ENOMEM;
}
endpoint = &altsetting->endpoint[EP_INT-1];
usb_fill_int_urb(urb, dev,
usb_rcvintpipe(dev, endpoint->desc.bEndpointAddress),
buf, INT_PKT_SIZE,
usb_int_complete, adapter,
endpoint->desc.bInterval);
return 0;
}
/**
* usb_set_interface - Makes a particular alternate setting be current
* @dev: the device whose interface is being updated
* @interface: the interface being updated
* @alternate: the setting being chosen.
* Context: !in_interrupt ()
*
* This is used to enable data transfers on interfaces that may not
* be enabled by default. Not all devices support such configurability.
* Only the driver bound to an interface may change its setting.
*
* Within any given configuration, each interface may have several
* alternative settings. These are often used to control levels of
* bandwidth consumption. For example, the default setting for a high
* speed interrupt endpoint may not send more than 64 bytes per microframe,
* while interrupt transfers of up to 3KBytes per microframe are legal.
* Also, isochronous endpoints may never be part of an
* interface's default setting. To access such bandwidth, alternate
* interface settings must be made current.
*
* Note that in the Linux USB subsystem, bandwidth associated with
* an endpoint in a given alternate setting is not reserved until an URB
* is submitted that needs that bandwidth. Some other operating systems
* allocate bandwidth early, when a configuration is chosen.
*
* This call is synchronous, and may not be used in an interrupt context.
* Also, drivers must not change altsettings while urbs are scheduled for
* endpoints in that interface; all such urbs must first be completed
* (perhaps forced by unlinking).
*
* Returns zero on success, or else the status code returned by the
* underlying usb_control_msg() call.
*/
int usb_set_interface(struct usb_device *dev, int interface, int alternate)
{
struct usb_interface *iface;
struct usb_host_interface *alt;
int ret;
int manual = 0;
if (dev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
iface = usb_ifnum_to_if(dev, interface);
if (!iface) {
dev_dbg(&dev->dev, "selecting invalid interface %d\n",
interface);
return -EINVAL;
}
alt = usb_altnum_to_altsetting(iface, alternate);
if (!alt) {
warn("selecting invalid altsetting %d", alternate);
return -EINVAL;
}
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
alternate, interface, NULL, 0, 5000);
/* 9.4.10 says devices don't need this and are free to STALL the
* request if the interface only has one alternate setting.
*/
if (ret == -EPIPE && iface->num_altsetting == 1) {
dev_dbg(&dev->dev,
"manual set_interface for iface %d, alt %d\n",
interface, alternate);
manual = 1;
} else if (ret < 0)
return ret;
/* FIXME drivers shouldn't need to replicate/bugfix the logic here
* when they implement async or easily-killable versions of this or
* other "should-be-internal" functions (like clear_halt).
* should hcd+usbcore postprocess control requests?
*/
/* prevent submissions using previous endpoint settings */
usb_disable_interface(dev, iface);
/* 9.1.1.5 says:
*
* Configuring a device or changing an alternate setting
* causes all of the status and configuration values
* associated with endpoints in the affected interfaces to
* be set to their default values. This includes setting
* the data toggle of any endpoint using data toggles to
* the value DATA0.
*
* Some devices take this too literally and don't reset the data
* toggles if the new altsetting is the same as the old one (the
* command isn't "changing" an alternate setting). We will manually
* reset the toggles when the new and old altsettings are the same.
* Most devices won't need this, but fortunately it doesn't happen
* often.
*/
if (iface->cur_altsetting == alt)
manual = 1;
iface->cur_altsetting = alt;
/* If the interface only has one altsetting and the device didn't
* accept the request (or whenever the old altsetting is the same
* as the new one), we attempt to carry out the equivalent action
* by manually clearing the HALT feature for each endpoint in the
* new altsetting.
*/
if (manual) {
int i;
for (i = 0; i < alt->desc.bNumEndpoints; i++) {
unsigned int epaddr =
alt->endpoint[i].desc.bEndpointAddress;
unsigned int pipe =
__create_pipe(dev, USB_ENDPOINT_NUMBER_MASK & epaddr)
| (usb_endpoint_out(epaddr) ? USB_DIR_OUT : USB_DIR_IN);
usb_clear_halt(dev, pipe);
}
}
/* 9.1.1.5: reset toggles for all endpoints in the new altsetting
*
* Note:
* Despite EP0 is always present in all interfaces/AS, the list of
* endpoints from the descriptor does not contain EP0. Due to its
* omnipresence one might expect EP0 being considered "affected" by
* any SetInterface request and hence assume toggles need to be reset.
* However, EP0 toggles are re-synced for every individual transfer
* during the SETUP stage - hence EP0 toggles are "don't care" here.
* (Likewise, EP0 never "halts" on well designed devices.)
*/
usb_enable_interface(dev, iface);
return 0;
}
