static void acm_disconnect(struct usb_interface *intf) { struct acm *acm = usb_get_intfdata(intf); struct usb_device *usb_dev = interface_to_usbdev(intf); int i; if (!acm || !acm->dev) { dbg("disconnect on nonexisting interface"); return; } mutex_lock(&open_mutex); if (!usb_get_intfdata(intf)) { mutex_unlock(&open_mutex); return; } if (acm->country_codes){ device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); device_remove_file(&acm->control->dev, &dev_attr_iCountryCodeRelDate); } device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); tasklet_disable(&acm->urb_task); usb_kill_urb(acm->ctrlurb); usb_kill_urb(acm->writeurb); for (i = 0; i < acm->rx_buflimit; i++) usb_kill_urb(acm->ru[i].urb); INIT_LIST_HEAD(&acm->filled_read_bufs); INIT_LIST_HEAD(&acm->spare_read_bufs); tasklet_enable(&acm->urb_task); flush_scheduled_work(); /* wait for acm_softint */ acm_write_buffers_free(acm); usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); for (i = 0; i < acm->rx_buflimit; i++) usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : intf); if (!acm->used) { acm_tty_unregister(acm); mutex_unlock(&open_mutex); return; } mutex_unlock(&open_mutex); if (acm->tty) tty_hangup(acm->tty); }
static void acm_disconnect(struct usb_interface *intf) { struct acm *acm = usb_get_intfdata(intf); struct usb_device *usb_dev = interface_to_usbdev(intf); struct tty_struct *tty; struct urb *res; u32 project_info = tegra3_get_project_id(); /* sibling interface is already cleaning up */ if (!acm) return; mutex_lock(&open_mutex); if (acm->country_codes) { device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); device_remove_file(&acm->control->dev, &dev_attr_iCountryCodeRelDate); } device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); stop_data_traffic(acm); /* decrement ref count of anchored urbs */ while ((res = usb_get_from_anchor(&acm->deferred))) usb_put_urb(res); acm_write_buffers_free(acm); usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); acm_read_buffers_free(acm); if (!acm->combined_interfaces) usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : acm->control); if (acm->port.count == 0) { acm_tty_unregister(acm); mutex_unlock(&open_mutex); return; } mutex_unlock(&open_mutex); tty = tty_port_tty_get(&acm->port); if (tty) { tty_hangup(tty); tty_kref_put(tty); } if (project_info == TEGRA3_PROJECT_TF201) { if(gps_dongle_flag == true) { dev_info(&usb_dev->dev, "ublox - GPS Receiver Dongle unplug.\n"); gps_dongle_flag = false; } } }
static void acm_disconnect(struct usb_interface *intf) { struct acm *acm = usb_get_intfdata(intf); struct usb_device *usb_dev = interface_to_usbdev(intf); struct tty_struct *tty; int i; dev_dbg(&intf->dev, "%s\n", __func__); /* sibling interface is already cleaning up */ if (!acm) return; mutex_lock(&acm->mutex); acm->disconnected = true; if (acm->country_codes) { device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); device_remove_file(&acm->control->dev, &dev_attr_iCountryCodeRelDate); kfree(acm->country_codes); } device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); mutex_unlock(&acm->mutex); tty = tty_port_tty_get(&acm->port); if (tty) { tty_vhangup(tty); tty_kref_put(tty); } stop_data_traffic(acm); tty_unregister_device(acm_tty_driver, acm->minor); usb_free_urb(acm->ctrlurb); for (i = 0; i < ACM_NW; i++) usb_free_urb(acm->wb[i].urb); for (i = 0; i < acm->rx_buflimit; i++) usb_free_urb(acm->read_urbs[i]); acm_write_buffers_free(acm); usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); acm_read_buffers_free(acm); if (!acm->combined_interfaces) usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : acm->control); tty_port_put(&acm->port); }
static void acm_disconnect(struct usb_interface *intf) { struct acm *acm = usb_get_intfdata(intf); struct usb_device *usb_dev = interface_to_usbdev(intf); int i; if (!acm || !acm->dev) { dbg("disconnect on nonexisting interface"); return; } mutex_lock(&open_mutex); if (!usb_get_intfdata(intf)) { mutex_unlock(&open_mutex); return; } if (acm->country_codes){ device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); device_remove_file(&acm->control->dev, &dev_attr_iCountryCodeRelDate); } device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); stop_data_traffic(acm); acm_write_buffers_free(acm); usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); for (i = 0; i < acm->rx_buflimit; i++) usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : intf); if (!acm->used) { acm_tty_unregister(acm); mutex_unlock(&open_mutex); return; } mutex_unlock(&open_mutex); if (acm->tty) tty_hangup(acm->tty); }
static void acm_disconnect(struct usb_interface *intf) { struct acm *acm = usb_get_intfdata(intf); struct usb_device *usb_dev = interface_to_usbdev(intf); struct tty_struct *tty; /* sibling interface is already cleaning up */ if (!acm) return; mutex_lock(&open_mutex); if (acm->country_codes) { device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); device_remove_file(&acm->control->dev, &dev_attr_iCountryCodeRelDate); } device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); stop_data_traffic(acm); usb_kill_anchored_urbs(&acm->deferred); acm_write_buffers_free(acm); usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); acm_read_buffers_free(acm); if (!acm->combined_interfaces) usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : acm->control); if (acm->port.count == 0) { acm_tty_unregister(acm); mutex_unlock(&open_mutex); return; } mutex_unlock(&open_mutex); tty = tty_port_tty_get(&acm->port); if (tty) { tty_hangup(tty); tty_kref_put(tty); } }
static void acm_disconnect(struct usb_interface *intf) { struct acm *acm = usb_get_intfdata(intf); struct usb_device *usb_dev = interface_to_usbdev(intf); /* sibling interface is already cleaning up */ if (!acm) return; mutex_lock(&open_mutex); if (acm->country_codes){ device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); device_remove_file(&acm->control->dev, &dev_attr_iCountryCodeRelDate); } device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); stop_data_traffic(acm); acm_write_buffers_free(acm); usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); acm_read_buffers_free(acm); usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : acm->control); if (!acm->used) { acm_tty_unregister(acm); mutex_unlock(&open_mutex); return; } mutex_unlock(&open_mutex); if (acm->tty) tty_hangup(acm->tty); }
static int acm_probe (struct usb_interface *intf, const struct usb_device_id *id) { struct usb_cdc_union_desc *union_header = NULL; struct usb_cdc_country_functional_desc *cfd = NULL; unsigned char *buffer = intf->altsetting->extra; int buflen = intf->altsetting->extralen; struct usb_interface *control_interface; struct usb_interface *data_interface; struct usb_endpoint_descriptor *epctrl; struct usb_endpoint_descriptor *epread; struct usb_endpoint_descriptor *epwrite; struct usb_device *usb_dev = interface_to_usbdev(intf); struct acm *acm; int minor; int ctrlsize,readsize; u8 *buf; u8 ac_management_function = 0; u8 call_management_function = 0; int call_interface_num = -1; int data_interface_num; unsigned long quirks; int num_rx_buf; int i; /* normal quirks */ quirks = (unsigned long)id->driver_info; num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; /* handle quirks deadly to normal probing*/ if (quirks == NO_UNION_NORMAL) { data_interface = usb_ifnum_to_if(usb_dev, 1); control_interface = usb_ifnum_to_if(usb_dev, 0); goto skip_normal_probe; } /* normal probing*/ if (!buffer) { err("Weird descriptor references\n"); return -EINVAL; } if (!buflen) { if (intf->cur_altsetting->endpoint && intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) { dev_dbg(&intf->dev,"Seeking extra descriptors on endpoint\n"); buflen = intf->cur_altsetting->endpoint->extralen; buffer = intf->cur_altsetting->endpoint->extra; } else { err("Zero length descriptor references\n"); return -EINVAL; } } while (buflen > 0) { if (buffer [1] != USB_DT_CS_INTERFACE) { err("skipping garbage\n"); goto next_desc; } switch (buffer [2]) { case USB_CDC_UNION_TYPE: /* we've found it */ if (union_header) { err("More than one union descriptor, skipping ..."); goto next_desc; } union_header = (struct usb_cdc_union_desc *) buffer; break; case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ cfd = (struct usb_cdc_country_functional_desc *)buffer; break; case USB_CDC_HEADER_TYPE: /* maybe check version */ break; /* for now we ignore it */ case USB_CDC_ACM_TYPE: ac_management_function = buffer[3]; break; case USB_CDC_CALL_MANAGEMENT_TYPE: call_management_function = buffer[3]; call_interface_num = buffer[4]; if ((call_management_function & 3) != 3) err("This device cannot do calls on its own. It is no modem."); break; default: /* there are LOTS more CDC descriptors that * could legitimately be found here. */ dev_dbg(&intf->dev, "Ignoring descriptor: " "type %02x, length %d\n", buffer[2], buffer[0]); break; } next_desc: buflen -= buffer[0]; buffer += buffer[0]; } if (!union_header) { if (call_interface_num > 0) { dev_dbg(&intf->dev,"No union descriptor, using call management descriptor\n"); data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); control_interface = intf; } else { dev_dbg(&intf->dev,"No union descriptor, giving up\n"); return -ENODEV; } } else { control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); if (!control_interface || !data_interface) { dev_dbg(&intf->dev,"no interfaces\n"); return -ENODEV; } } if (data_interface_num != call_interface_num) dev_dbg(&intf->dev,"Seperate call control interface. That is not fully supported.\n"); skip_normal_probe: /*workaround for switched interfaces */ if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) { if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) { struct usb_interface *t; dev_dbg(&intf->dev,"Your device has switched interfaces.\n"); t = control_interface; control_interface = data_interface; data_interface = t; } else { return -EINVAL; } } /* Accept probe requests only for the control interface */ if (intf != control_interface) return -ENODEV; if (usb_interface_claimed(data_interface)) { /* valid in this context */ dev_dbg(&intf->dev,"The data interface isn't available\n"); return -EBUSY; } if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) return -EINVAL; epctrl = &control_interface->cur_altsetting->endpoint[0].desc; epread = &data_interface->cur_altsetting->endpoint[0].desc; epwrite = &data_interface->cur_altsetting->endpoint[1].desc; /* workaround for switched endpoints */ if (!usb_endpoint_dir_in(epread)) { /* descriptors are swapped */ struct usb_endpoint_descriptor *t; dev_dbg(&intf->dev,"The data interface has switched endpoints\n"); t = epread; epread = epwrite; epwrite = t; } dbg("interfaces are valid"); for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); if (minor == ACM_TTY_MINORS) { err("no more free acm devices"); return -ENODEV; } if (!(acm = kzalloc(sizeof(struct acm), GFP_KERNEL))) { dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); goto alloc_fail; } ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); readsize = le16_to_cpu(epread->wMaxPacketSize)* ( quirks == SINGLE_RX_URB ? 1 : 2); acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; acm->control = control_interface; acm->data = data_interface; acm->minor = minor; acm->dev = usb_dev; acm->ctrl_caps = ac_management_function; acm->ctrlsize = ctrlsize; acm->readsize = readsize; acm->rx_buflimit = num_rx_buf; acm->urb_task.func = acm_rx_tasklet; acm->urb_task.data = (unsigned long) acm; INIT_WORK(&acm->work, acm_softint); INIT_WORK(&acm->waker, acm_waker); spin_lock_init(&acm->throttle_lock); spin_lock_init(&acm->write_lock); spin_lock_init(&acm->read_lock); mutex_init(&acm->mutex); acm->write_ready = 1; acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); if (!buf) { dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); goto alloc_fail2; } acm->ctrl_buffer = buf; if (acm_write_buffers_alloc(acm) < 0) { dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); goto alloc_fail4; } acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); if (!acm->ctrlurb) { dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); goto alloc_fail5; } for (i = 0; i < num_rx_buf; i++) { struct acm_ru *rcv = &(acm->ru[i]); if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) { dev_dbg(&intf->dev, "out of memory (read urbs usb_alloc_urb)\n"); goto alloc_fail7; } rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; rcv->instance = acm; } for (i = 0; i < num_rx_buf; i++) { struct acm_rb *buf = &(acm->rb[i]); if (!(buf->base = usb_buffer_alloc(acm->dev, readsize, GFP_KERNEL, &buf->dma))) { dev_dbg(&intf->dev, "out of memory (read bufs usb_buffer_alloc)\n"); goto alloc_fail7; } } for(i = 0; i < ACM_NW; i++) { struct acm_wb *snd = &(acm->wb[i]); if (!(snd->urb = usb_alloc_urb(0, GFP_KERNEL))) { dev_dbg(&intf->dev, "out of memory (write urbs usb_alloc_urb)"); goto alloc_fail7; } usb_fill_bulk_urb(snd->urb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), NULL, acm->writesize, acm_write_bulk, snd); snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; snd->instance = acm; } usb_set_intfdata (intf, acm); i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); if (i < 0) goto alloc_fail8; if (cfd) { /* export the country data */ acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); if (!acm->country_codes) goto skip_countries; acm->country_code_size = cfd->bLength - 4; memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, cfd->bLength - 4); acm->country_rel_date = cfd->iCountryCodeRelDate; i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); if (i < 0) { kfree(acm->country_codes); goto skip_countries; } i = device_create_file(&intf->dev, &dev_attr_iCountryCodeRelDate); if (i < 0) { kfree(acm->country_codes); goto skip_countries; } } skip_countries: usb_fill_int_urb(acm->ctrlurb, usb_dev, usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval); acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; acm->ctrlurb->transfer_dma = acm->ctrl_dma; dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); acm_set_control(acm, acm->ctrlout); acm->line.dwDTERate = cpu_to_le32(9600); acm->line.bDataBits = 8; acm_set_line(acm, &acm->line); usb_driver_claim_interface(&acm_driver, data_interface, acm); usb_get_intf(control_interface); tty_register_device(acm_tty_driver, minor, &control_interface->dev); acm_table[minor] = acm; return 0; alloc_fail8: for (i = 0; i < ACM_NW; i++) usb_free_urb(acm->wb[i].urb); alloc_fail7: acm_read_buffers_free(acm); for (i = 0; i < num_rx_buf; i++) usb_free_urb(acm->ru[i].urb); usb_free_urb(acm->ctrlurb); alloc_fail5: acm_write_buffers_free(acm); alloc_fail4: usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); alloc_fail2: kfree(acm); alloc_fail: return -ENOMEM; }
static int acm_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_cdc_union_desc *union_header = NULL; struct usb_cdc_country_functional_desc *cfd = NULL; unsigned char *buffer = intf->altsetting->extra; int buflen = intf->altsetting->extralen; struct usb_interface *control_interface; struct usb_interface *data_interface; struct usb_endpoint_descriptor *epctrl = NULL; struct usb_endpoint_descriptor *epread = NULL; struct usb_endpoint_descriptor *epwrite = NULL; struct usb_device *usb_dev = interface_to_usbdev(intf); struct acm *acm; int minor; int ctrlsize, readsize; u8 *buf; u8 ac_management_function = 0; u8 call_management_function = 0; int call_interface_num = -1; int data_interface_num = -1; unsigned long quirks; int num_rx_buf; int i; int combined_interfaces = 0; /* normal quirks */ quirks = (unsigned long)id->driver_info; num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; /* handle quirks deadly to normal probing*/ if (quirks == NO_UNION_NORMAL) { data_interface = usb_ifnum_to_if(usb_dev, 1); control_interface = usb_ifnum_to_if(usb_dev, 0); /* we would crash */ if (!data_interface || !control_interface) return -ENODEV; goto skip_normal_probe; } /* normal probing*/ if (!buffer) { dev_err(&intf->dev, "Weird descriptor references\n"); return -EINVAL; } if (!buflen) { if (intf->cur_altsetting->endpoint && intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) { dev_dbg(&intf->dev, "Seeking extra descriptors on endpoint\n"); buflen = intf->cur_altsetting->endpoint->extralen; buffer = intf->cur_altsetting->endpoint->extra; } else { dev_err(&intf->dev, "Zero length descriptor references\n"); return -EINVAL; } } while (buflen > 0) { if (buffer[1] != USB_DT_CS_INTERFACE) { dev_err(&intf->dev, "skipping garbage\n"); goto next_desc; } switch (buffer[2]) { case USB_CDC_UNION_TYPE: /* we've found it */ if (union_header) { dev_err(&intf->dev, "More than one " "union descriptor, skipping ...\n"); goto next_desc; } union_header = (struct usb_cdc_union_desc *)buffer; break; case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ cfd = (struct usb_cdc_country_functional_desc *)buffer; break; case USB_CDC_HEADER_TYPE: /* maybe check version */ break; /* for now we ignore it */ case USB_CDC_ACM_TYPE: ac_management_function = buffer[3]; break; case USB_CDC_CALL_MANAGEMENT_TYPE: call_management_function = buffer[3]; call_interface_num = buffer[4]; if ( (quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); break; default: /* there are LOTS more CDC descriptors that * could legitimately be found here. */ dev_dbg(&intf->dev, "Ignoring descriptor: " "type %02x, length %d\n", buffer[2], buffer[0]); break; } next_desc: buflen -= buffer[0]; buffer += buffer[0]; } if (!union_header) { if (call_interface_num > 0) { dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); /* quirks for Droids MuIn LCD */ if (quirks & NO_DATA_INTERFACE) data_interface = usb_ifnum_to_if(usb_dev, 0); else data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); control_interface = intf; } else { if (intf->cur_altsetting->desc.bNumEndpoints != 3) { dev_dbg(&intf->dev,"No union descriptor, giving up\n"); return -ENODEV; } else { dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); combined_interfaces = 1; control_interface = data_interface = intf; goto look_for_collapsed_interface; } } } else { control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); if (!control_interface || !data_interface) { dev_dbg(&intf->dev, "no interfaces\n"); return -ENODEV; } } if (data_interface_num != call_interface_num) dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); if (control_interface == data_interface) { /* some broken devices designed for windows work this way */ dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); combined_interfaces = 1; /* a popular other OS doesn't use it */ quirks |= NO_CAP_LINE; if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); return -EINVAL; } look_for_collapsed_interface: for (i = 0; i < 3; i++) { struct usb_endpoint_descriptor *ep; ep = &data_interface->cur_altsetting->endpoint[i].desc; if (usb_endpoint_is_int_in(ep)) epctrl = ep; else if (usb_endpoint_is_bulk_out(ep)) epwrite = ep; else if (usb_endpoint_is_bulk_in(ep)) epread = ep; else return -EINVAL; } if (!epctrl || !epread || !epwrite) return -ENODEV; else goto made_compressed_probe; } skip_normal_probe: /*workaround for switched interfaces */ if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) { if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) { struct usb_interface *t; dev_dbg(&intf->dev, "Your device has switched interfaces.\n"); t = control_interface; control_interface = data_interface; data_interface = t; } else { return -EINVAL; } } /* Accept probe requests only for the control interface */ if (!combined_interfaces && intf != control_interface) return -ENODEV; if (!combined_interfaces && usb_interface_claimed(data_interface)) { /* valid in this context */ dev_dbg(&intf->dev, "The data interface isn't available\n"); return -EBUSY; } if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || control_interface->cur_altsetting->desc.bNumEndpoints == 0) return -EINVAL; epctrl = &control_interface->cur_altsetting->endpoint[0].desc; epread = &data_interface->cur_altsetting->endpoint[0].desc; epwrite = &data_interface->cur_altsetting->endpoint[1].desc; /* workaround for switched endpoints */ if (!usb_endpoint_dir_in(epread)) { /* descriptors are swapped */ struct usb_endpoint_descriptor *t; dev_dbg(&intf->dev, "The data interface has switched endpoints\n"); t = epread; epread = epwrite; epwrite = t; } made_compressed_probe: dev_dbg(&intf->dev, "interfaces are valid\n"); for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); if (minor == ACM_TTY_MINORS) { dev_err(&intf->dev, "no more free acm devices\n"); return -ENODEV; } acm = kzalloc(sizeof(struct acm), GFP_KERNEL); if (acm == NULL) { dev_err(&intf->dev, "out of memory (acm kzalloc)\n"); goto alloc_fail; } ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); readsize = le16_to_cpu(epread->wMaxPacketSize) * (quirks == SINGLE_RX_URB ? 1 : 2); acm->combined_interfaces = combined_interfaces; acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; acm->control = control_interface; acm->data = data_interface; acm->minor = minor; acm->dev = usb_dev; acm->ctrl_caps = ac_management_function; if (quirks & NO_CAP_LINE) acm->ctrl_caps &= ~USB_CDC_CAP_LINE; acm->ctrlsize = ctrlsize; acm->readsize = readsize; acm->rx_buflimit = num_rx_buf; INIT_WORK(&acm->work, acm_softint); spin_lock_init(&acm->write_lock); spin_lock_init(&acm->read_lock); mutex_init(&acm->mutex); acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); acm->is_int_ep = usb_endpoint_xfer_int(epread); if (acm->is_int_ep) acm->bInterval = epread->bInterval; tty_port_init(&acm->port); acm->port.ops = &acm_port_ops; buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); if (!buf) { dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n"); goto alloc_fail2; } acm->ctrl_buffer = buf; if (acm_write_buffers_alloc(acm) < 0) { dev_err(&intf->dev, "out of memory (write buffer alloc)\n"); goto alloc_fail4; } acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); if (!acm->ctrlurb) { dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); goto alloc_fail5; } for (i = 0; i < num_rx_buf; i++) { struct acm_rb *rb = &(acm->read_buffers[i]); struct urb *urb; rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, &rb->dma); if (!rb->base) { dev_err(&intf->dev, "out of memory " "(read bufs usb_alloc_coherent)\n"); goto alloc_fail6; } rb->index = i; rb->instance = acm; urb = usb_alloc_urb(0, GFP_KERNEL); if (!urb) { dev_err(&intf->dev, "out of memory (read urbs usb_alloc_urb)\n"); goto alloc_fail6; } urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; urb->transfer_dma = rb->dma; if (acm->is_int_ep) { usb_fill_int_urb(urb, acm->dev, acm->rx_endpoint, rb->base, acm->readsize, acm_read_bulk_callback, rb, acm->bInterval); } else { usb_fill_bulk_urb(urb, acm->dev, acm->rx_endpoint, rb->base, acm->readsize, acm_read_bulk_callback, rb); } acm->read_urbs[i] = urb; __set_bit(i, &acm->read_urbs_free); } for (i = 0; i < ACM_NW; i++) { struct acm_wb *snd = &(acm->wb[i]); snd->urb = usb_alloc_urb(0, GFP_KERNEL); if (snd->urb == NULL) { dev_err(&intf->dev, "out of memory (write urbs usb_alloc_urb)\n"); goto alloc_fail7; } if (usb_endpoint_xfer_int(epwrite)) usb_fill_int_urb(snd->urb, usb_dev, usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); else usb_fill_bulk_urb(snd->urb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), NULL, acm->writesize, acm_write_bulk, snd); snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; snd->instance = acm; } usb_set_intfdata(intf, acm); i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); if (i < 0) goto alloc_fail7; if (cfd) { /* export the country data */ acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); if (!acm->country_codes) goto skip_countries; acm->country_code_size = cfd->bLength - 4; memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, cfd->bLength - 4); acm->country_rel_date = cfd->iCountryCodeRelDate; i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); if (i < 0) { kfree(acm->country_codes); acm->country_codes = NULL; acm->country_code_size = 0; goto skip_countries; } i = device_create_file(&intf->dev, &dev_attr_iCountryCodeRelDate); if (i < 0) { device_remove_file(&intf->dev, &dev_attr_wCountryCodes); kfree(acm->country_codes); acm->country_codes = NULL; acm->country_code_size = 0; goto skip_countries; } } skip_countries: usb_fill_int_urb(acm->ctrlurb, usb_dev, usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, /* works around buggy devices */ epctrl->bInterval ? epctrl->bInterval : 0xff); acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; acm->ctrlurb->transfer_dma = acm->ctrl_dma; dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); acm_set_control(acm, acm->ctrlout); acm->line.dwDTERate = cpu_to_le32(9600); acm->line.bDataBits = 8; acm_set_line(acm, &acm->line); usb_driver_claim_interface(&acm_driver, data_interface, acm); usb_set_intfdata(data_interface, acm); usb_get_intf(control_interface); tty_register_device(acm_tty_driver, minor, &control_interface->dev); acm_table[minor] = acm; return 0; alloc_fail7: for (i = 0; i < ACM_NW; i++) usb_free_urb(acm->wb[i].urb); alloc_fail6: for (i = 0; i < num_rx_buf; i++) usb_free_urb(acm->read_urbs[i]); acm_read_buffers_free(acm); usb_free_urb(acm->ctrlurb); alloc_fail5: acm_write_buffers_free(acm); alloc_fail4: usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); alloc_fail2: kfree(acm); alloc_fail: return -ENOMEM; }