| #include <linux/usb.h> |
| #include <linux/usb/ch9.h> |
| #include <linux/usb/hcd.h> |
| #include <linux/usb/quirks.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/device.h> |
| #include <asm/byteorder.h> |
| #include "usb.h" |
| |
| |
| #define USB_MAXALTSETTING 128 /* Hard limit */ |
| |
| #define USB_MAXCONFIG 8 /* Arbitrary limit */ |
| |
| |
| static inline const char *plural(int n) |
| { |
| return (n == 1 ? "" : "s"); |
| } |
| |
| static int find_next_descriptor(unsigned char *buffer, int size, |
| int dt1, int dt2, int *num_skipped) |
| { |
| struct usb_descriptor_header *h; |
| int n = 0; |
| unsigned char *buffer0 = buffer; |
| |
| /* Find the next descriptor of type dt1 or dt2 */ |
| while (size > 0) { |
| h = (struct usb_descriptor_header *) buffer; |
| if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2) |
| break; |
| buffer += h->bLength; |
| size -= h->bLength; |
| ++n; |
| } |
| |
| /* Store the number of descriptors skipped and return the |
| * number of bytes skipped */ |
| if (num_skipped) |
| *num_skipped = n; |
| return buffer - buffer0; |
| } |
| |
| static void usb_parse_ssp_isoc_endpoint_companion(struct device *ddev, |
| int cfgno, int inum, int asnum, struct usb_host_endpoint *ep, |
| unsigned char *buffer, int size) |
| { |
| struct usb_ssp_isoc_ep_comp_descriptor *desc; |
| |
| /* |
| * The SuperSpeedPlus Isoc endpoint companion descriptor immediately |
| * follows the SuperSpeed Endpoint Companion descriptor |
| */ |
| desc = (struct usb_ssp_isoc_ep_comp_descriptor *) buffer; |
| if (desc->bDescriptorType != USB_DT_SSP_ISOC_ENDPOINT_COMP || |
| size < USB_DT_SSP_ISOC_EP_COMP_SIZE) { |
| dev_warn(ddev, "Invalid SuperSpeedPlus isoc endpoint companion" |
| "for config %d interface %d altsetting %d ep %d.\n", |
| cfgno, inum, asnum, ep->desc.bEndpointAddress); |
| return; |
| } |
| memcpy(&ep->ssp_isoc_ep_comp, desc, USB_DT_SSP_ISOC_EP_COMP_SIZE); |
| } |
| |
| static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, |
| int inum, int asnum, struct usb_host_endpoint *ep, |
| unsigned char *buffer, int size) |
| { |
| struct usb_ss_ep_comp_descriptor *desc; |
| int max_tx; |
| |
| /* The SuperSpeed endpoint companion descriptor is supposed to |
| * be the first thing immediately following the endpoint descriptor. |
| */ |
| desc = (struct usb_ss_ep_comp_descriptor *) buffer; |
| buffer += desc->bLength; |
| size -= desc->bLength; |
| |
| if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP || |
| size < USB_DT_SS_EP_COMP_SIZE) { |
| dev_warn(ddev, "No SuperSpeed endpoint companion for config %d " |
| " interface %d altsetting %d ep %d: " |
| "using minimum values\n", |
| cfgno, inum, asnum, ep->desc.bEndpointAddress); |
| |
| /* Fill in some default values. |
| * Leave bmAttributes as zero, which will mean no streams for |
| * bulk, and isoc won't support multiple bursts of packets. |
| * With bursts of only one packet, and a Mult of 1, the max |
| * amount of data moved per endpoint service interval is one |
| * packet. |
| */ |
| ep->ss_ep_comp.bLength = USB_DT_SS_EP_COMP_SIZE; |
| ep->ss_ep_comp.bDescriptorType = USB_DT_SS_ENDPOINT_COMP; |
| if (usb_endpoint_xfer_isoc(&ep->desc) || |
| usb_endpoint_xfer_int(&ep->desc)) |
| ep->ss_ep_comp.wBytesPerInterval = |
| ep->desc.wMaxPacketSize; |
| return; |
| } |
| |
| memcpy(&ep->ss_ep_comp, desc, USB_DT_SS_EP_COMP_SIZE); |
| |
| /* Check the various values */ |
| if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) { |
| dev_warn(ddev, "Control endpoint with bMaxBurst = %d in " |
| "config %d interface %d altsetting %d ep %d: " |
| "setting to zero\n", desc->bMaxBurst, |
| cfgno, inum, asnum, ep->desc.bEndpointAddress); |
| ep->ss_ep_comp.bMaxBurst = 0; |
| } else if (desc->bMaxBurst > 15) { |
| dev_warn(ddev, "Endpoint with bMaxBurst = %d in " |
| "config %d interface %d altsetting %d ep %d: " |
| "setting to 15\n", desc->bMaxBurst, |
| cfgno, inum, asnum, ep->desc.bEndpointAddress); |
| ep->ss_ep_comp.bMaxBurst = 15; |
| } |
| |
| if ((usb_endpoint_xfer_control(&ep->desc) || |
| usb_endpoint_xfer_int(&ep->desc)) && |
| desc->bmAttributes != 0) { |
| dev_warn(ddev, "%s endpoint with bmAttributes = %d in " |
| "config %d interface %d altsetting %d ep %d: " |
| "setting to zero\n", |
| usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk", |
| desc->bmAttributes, |
| cfgno, inum, asnum, ep->desc.bEndpointAddress); |
| ep->ss_ep_comp.bmAttributes = 0; |
| } else if (usb_endpoint_xfer_bulk(&ep->desc) && |
| desc->bmAttributes > 16) { |
| dev_warn(ddev, "Bulk endpoint with more than 65536 streams in " |
| "config %d interface %d altsetting %d ep %d: " |
| "setting to max\n", |
| cfgno, inum, asnum, ep->desc.bEndpointAddress); |
| ep->ss_ep_comp.bmAttributes = 16; |
| } else if (usb_endpoint_xfer_isoc(&ep->desc) && |
| !USB_SS_SSP_ISOC_COMP(desc->bmAttributes) && |
| USB_SS_MULT(desc->bmAttributes) > 3) { |
| dev_warn(ddev, "Isoc endpoint has Mult of %d in " |
| "config %d interface %d altsetting %d ep %d: " |
| "setting to 3\n", |
| USB_SS_MULT(desc->bmAttributes), |
| cfgno, inum, asnum, ep->desc.bEndpointAddress); |
| ep->ss_ep_comp.bmAttributes = 2; |
| } |
| |
| /* Parse a possible SuperSpeedPlus isoc ep companion descriptor */ |
| if (usb_endpoint_xfer_isoc(&ep->desc) && |
| USB_SS_SSP_ISOC_COMP(desc->bmAttributes)) |
| usb_parse_ssp_isoc_endpoint_companion(ddev, cfgno, inum, asnum, |
| ep, buffer, size); |
| |
| if (usb_endpoint_xfer_isoc(&ep->desc)) |
| max_tx = (desc->bMaxBurst + 1) * |
| (USB_SS_MULT(desc->bmAttributes)) * |
| usb_endpoint_maxp(&ep->desc); |
| else if (usb_endpoint_xfer_int(&ep->desc)) |
| max_tx = usb_endpoint_maxp(&ep->desc) * |
| (desc->bMaxBurst + 1); |
| else |
| max_tx = 999999; |
| if (le16_to_cpu(desc->wBytesPerInterval) > max_tx) { |
| dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in " |
| "config %d interface %d altsetting %d ep %d: " |
| "setting to %d\n", |
| usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int", |
| le16_to_cpu(desc->wBytesPerInterval), |
| cfgno, inum, asnum, ep->desc.bEndpointAddress, |
| max_tx); |
| ep->ss_ep_comp.wBytesPerInterval = cpu_to_le16(max_tx); |
| } |
| } |
| |
| static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum, |
| int asnum, struct usb_host_interface *ifp, int num_ep, |
| unsigned char *buffer, int size) |
| { |
| unsigned char *buffer0 = buffer; |
| struct usb_endpoint_descriptor *d; |
| struct usb_host_endpoint *endpoint; |
| int n, i, j, retval; |
| |
| d = (struct usb_endpoint_descriptor *) buffer; |
| buffer += d->bLength; |
| size -= d->bLength; |
| |
| if (d->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE) |
| n = USB_DT_ENDPOINT_AUDIO_SIZE; |
| else if (d->bLength >= USB_DT_ENDPOINT_SIZE) |
| n = USB_DT_ENDPOINT_SIZE; |
| else { |
| dev_warn(ddev, "config %d interface %d altsetting %d has an " |
| "invalid endpoint descriptor of length %d, skipping\n", |
| cfgno, inum, asnum, d->bLength); |
| goto skip_to_next_endpoint_or_interface_descriptor; |
| } |
| |
| i = d->bEndpointAddress & ~USB_ENDPOINT_DIR_MASK; |
| if (i >= 16 || i == 0) { |
| dev_warn(ddev, "config %d interface %d altsetting %d has an " |
| "invalid endpoint with address 0x%X, skipping\n", |
| cfgno, inum, asnum, d->bEndpointAddress); |
| goto skip_to_next_endpoint_or_interface_descriptor; |
| } |
| |
| /* Only store as many endpoints as we have room for */ |
| if (ifp->desc.bNumEndpoints >= num_ep) |
| goto skip_to_next_endpoint_or_interface_descriptor; |
| |
| endpoint = &ifp->endpoint[ifp->desc.bNumEndpoints]; |
| ++ifp->desc.bNumEndpoints; |
| |
| memcpy(&endpoint->desc, d, n); |
| INIT_LIST_HEAD(&endpoint->urb_list); |
| |
| /* Fix up bInterval values outside the legal range. Use 32 ms if no |
| * proper value can be guessed. */ |
| i = 0; /* i = min, j = max, n = default */ |
| j = 255; |
| if (usb_endpoint_xfer_int(d)) { |
| i = 1; |
| switch (to_usb_device(ddev)->speed) { |
| case USB_SPEED_SUPER_PLUS: |
| case USB_SPEED_SUPER: |
| case USB_SPEED_HIGH: |
| /* Many device manufacturers are using full-speed |
| * bInterval values in high-speed interrupt endpoint |
| * descriptors. Try to fix those and fall back to a |
| * 32 ms default value otherwise. */ |
| n = fls(d->bInterval*8); |
| if (n == 0) |
| n = 9; /* 32 ms = 2^(9-1) uframes */ |
| j = 16; |
| |
| /* |
| * Adjust bInterval for quirked devices. |
| * This quirk fixes bIntervals reported in |
| * linear microframes. |
| */ |
| if (to_usb_device(ddev)->quirks & |
| USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL) { |
| n = clamp(fls(d->bInterval), i, j); |
| i = j = n; |
| } |
| break; |
| default: /* USB_SPEED_FULL or _LOW */ |
| /* For low-speed, 10 ms is the official minimum. |
| * But some "overclocked" devices might want faster |
| * polling so we'll allow it. */ |
| n = 32; |
| break; |
| } |
| } else if (usb_endpoint_xfer_isoc(d)) { |
| i = 1; |
| j = 16; |
| switch (to_usb_device(ddev)->speed) { |
| case USB_SPEED_HIGH: |
| n = 9; /* 32 ms = 2^(9-1) uframes */ |
| break; |
| default: /* USB_SPEED_FULL */ |
| n = 6; /* 32 ms = 2^(6-1) frames */ |
| break; |
| } |
| } |
| if (d->bInterval < i || d->bInterval > j) { |
| dev_warn(ddev, "config %d interface %d altsetting %d " |
| "endpoint 0x%X has an invalid bInterval %d, " |
| "changing to %d\n", |
| cfgno, inum, asnum, |
| d->bEndpointAddress, d->bInterval, n); |
| endpoint->desc.bInterval = n; |
| } |
| |
| /* Some buggy low-speed devices have Bulk endpoints, which is |
| * explicitly forbidden by the USB spec. In an attempt to make |
| * them usable, we will try treating them as Interrupt endpoints. |
| */ |
| if (to_usb_device(ddev)->speed == USB_SPEED_LOW && |
| usb_endpoint_xfer_bulk(d)) { |
| dev_warn(ddev, "config %d interface %d altsetting %d " |
| "endpoint 0x%X is Bulk; changing to Interrupt\n", |
| cfgno, inum, asnum, d->bEndpointAddress); |
| endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT; |
| endpoint->desc.bInterval = 1; |
| if (usb_endpoint_maxp(&endpoint->desc) > 8) |
| endpoint->desc.wMaxPacketSize = cpu_to_le16(8); |
| } |
| |
| /* |
| * Some buggy high speed devices have bulk endpoints using |
| * maxpacket sizes other than 512. High speed HCDs may not |
| * be able to handle that particular bug, so let's warn... |
| */ |
| if (to_usb_device(ddev)->speed == USB_SPEED_HIGH |
| && usb_endpoint_xfer_bulk(d)) { |
| unsigned maxp; |
| |
| maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff; |
| if (maxp != 512) |
| dev_warn(ddev, "config %d interface %d altsetting %d " |
| "bulk endpoint 0x%X has invalid maxpacket %d\n", |
| cfgno, inum, asnum, d->bEndpointAddress, |
| maxp); |
| } |
| |
| /* Parse a possible SuperSpeed endpoint companion descriptor */ |
| if (to_usb_device(ddev)->speed >= USB_SPEED_SUPER) |
| usb_parse_ss_endpoint_companion(ddev, cfgno, |
| inum, asnum, endpoint, buffer, size); |
| |
| /* Skip over any Class Specific or Vendor Specific descriptors; |
| * find the next endpoint or interface descriptor */ |
| endpoint->extra = buffer; |
| i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, |
| USB_DT_INTERFACE, &n); |
| endpoint->extralen = i; |
| retval = buffer - buffer0 + i; |
| if (n > 0) |
| dev_dbg(ddev, "skipped %d descriptor%s after %s\n", |
| n, plural(n), "endpoint"); |
| return retval; |
| |
| skip_to_next_endpoint_or_interface_descriptor: |
| i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, |
| USB_DT_INTERFACE, NULL); |
| return buffer - buffer0 + i; |
| } |
| |
| void usb_release_interface_cache(struct kref *ref) |
| { |
| struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref); |
| int j; |
| |
| for (j = 0; j < intfc->num_altsetting; j++) { |
| struct usb_host_interface *alt = &intfc->altsetting[j]; |
| |
| kfree(alt->endpoint); |
| kfree(alt->string); |
| } |
| kfree(intfc); |
| } |
| |
| static int usb_parse_interface(struct device *ddev, int cfgno, |
| struct usb_host_config *config, unsigned char *buffer, int size, |
| u8 inums[], u8 nalts[]) |
| { |
| unsigned char *buffer0 = buffer; |
| struct usb_interface_descriptor *d; |
| int inum, asnum; |
| struct usb_interface_cache *intfc; |
| struct usb_host_interface *alt; |
| int i, n; |
| int len, retval; |
| int num_ep, num_ep_orig; |
| |
| d = (struct usb_interface_descriptor *) buffer; |
| buffer += d->bLength; |
| size -= d->bLength; |
| |
| if (d->bLength < USB_DT_INTERFACE_SIZE) |
| goto skip_to_next_interface_descriptor; |
| |
| /* Which interface entry is this? */ |
| intfc = NULL; |
| inum = d->bInterfaceNumber; |
| for (i = 0; i < config->desc.bNumInterfaces; ++i) { |
| if (inums[i] == inum) { |
| intfc = config->intf_cache[i]; |
| break; |
| } |
| } |
| if (!intfc || intfc->num_altsetting >= nalts[i]) |
| goto skip_to_next_interface_descriptor; |
| |
| /* Check for duplicate altsetting entries */ |
| asnum = d->bAlternateSetting; |
| for ((i = 0, alt = &intfc->altsetting[0]); |
| i < intfc->num_altsetting; |
| (++i, ++alt)) { |
| if (alt->desc.bAlternateSetting == asnum) { |
| dev_warn(ddev, "Duplicate descriptor for config %d " |
| "interface %d altsetting %d, skipping\n", |
| cfgno, inum, asnum); |
| goto skip_to_next_interface_descriptor; |
| } |
| } |
| |
| ++intfc->num_altsetting; |
| memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE); |
| |
| /* Skip over any Class Specific or Vendor Specific descriptors; |
| * find the first endpoint or interface descriptor */ |
| alt->extra = buffer; |
| i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, |
| USB_DT_INTERFACE, &n); |
| alt->extralen = i; |
| if (n > 0) |
| dev_dbg(ddev, "skipped %d descriptor%s after %s\n", |
| n, plural(n), "interface"); |
| buffer += i; |
| size -= i; |
| |
| /* Allocate space for the right(?) number of endpoints */ |
| num_ep = num_ep_orig = alt->desc.bNumEndpoints; |
| alt->desc.bNumEndpoints = 0; /* Use as a counter */ |
| if (num_ep > USB_MAXENDPOINTS) { |
| dev_warn(ddev, "too many endpoints for config %d interface %d " |
| "altsetting %d: %d, using maximum allowed: %d\n", |
| cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS); |
| num_ep = USB_MAXENDPOINTS; |
| } |
| |
| if (num_ep > 0) { |
| /* Can't allocate 0 bytes */ |
| len = sizeof(struct usb_host_endpoint) * num_ep; |
| alt->endpoint = kzalloc(len, GFP_KERNEL); |
| if (!alt->endpoint) |
| return -ENOMEM; |
| } |
| |
| /* Parse all the endpoint descriptors */ |
| n = 0; |
| while (size > 0) { |
| if (((struct usb_descriptor_header *) buffer)->bDescriptorType |
| == USB_DT_INTERFACE) |
| break; |
| retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt, |
| num_ep, buffer, size); |
| if (retval < 0) |
| return retval; |
| ++n; |
| |
| buffer += retval; |
| size -= retval; |
| } |
| |
| if (n != num_ep_orig) |
| dev_warn(ddev, "config %d interface %d altsetting %d has %d " |
| "endpoint descriptor%s, different from the interface " |
| "descriptor's value: %d\n", |
| cfgno, inum, asnum, n, plural(n), num_ep_orig); |
| return buffer - buffer0; |
| |
| skip_to_next_interface_descriptor: |
| i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, |
| USB_DT_INTERFACE, NULL); |
| return buffer - buffer0 + i; |
| } |
| |
| static int usb_parse_configuration(struct usb_device *dev, int cfgidx, |
| struct usb_host_config *config, unsigned char *buffer, int size) |
| { |
| struct device *ddev = &dev->dev; |
| unsigned char *buffer0 = buffer; |
| int cfgno; |
| int nintf, nintf_orig; |
| int i, j, n; |
| struct usb_interface_cache *intfc; |
| unsigned char *buffer2; |
| int size2; |
| struct usb_descriptor_header *header; |
| int len, retval; |
| u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES]; |
| unsigned iad_num = 0; |
| |
| memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE); |
| if (config->desc.bDescriptorType != USB_DT_CONFIG || |
| config->desc.bLength < USB_DT_CONFIG_SIZE || |
| config->desc.bLength > size) { |
| dev_err(ddev, "invalid descriptor for config index %d: " |
| "type = 0x%X, length = %d\n", cfgidx, |
| config->desc.bDescriptorType, config->desc.bLength); |
| return -EINVAL; |
| } |
| cfgno = config->desc.bConfigurationValue; |
| |
| buffer += config->desc.bLength; |
| size -= config->desc.bLength; |
| |
| nintf = nintf_orig = config->desc.bNumInterfaces; |
| if (nintf > USB_MAXINTERFACES) { |
| dev_warn(ddev, "config %d has too many interfaces: %d, " |
| "using maximum allowed: %d\n", |
| cfgno, nintf, USB_MAXINTERFACES); |
| nintf = USB_MAXINTERFACES; |
| } |
| |
| /* Go through the descriptors, checking their length and counting the |
| * number of altsettings for each interface */ |
| n = 0; |
| for ((buffer2 = buffer, size2 = size); |
| size2 > 0; |
| (buffer2 += header->bLength, size2 -= header->bLength)) { |
| |
| if (size2 < sizeof(struct usb_descriptor_header)) { |
| dev_warn(ddev, "config %d descriptor has %d excess " |
| "byte%s, ignoring\n", |
| cfgno, size2, plural(size2)); |
| break; |
| } |
| |
| header = (struct usb_descriptor_header *) buffer2; |
| if ((header->bLength > size2) || (header->bLength < 2)) { |
| dev_warn(ddev, "config %d has an invalid descriptor " |
| "of length %d, skipping remainder of the config\n", |
| cfgno, header->bLength); |
| break; |
| } |
| |
| if (header->bDescriptorType == USB_DT_INTERFACE) { |
| struct usb_interface_descriptor *d; |
| int inum; |
| |
| d = (struct usb_interface_descriptor *) header; |
| if (d->bLength < USB_DT_INTERFACE_SIZE) { |
| dev_warn(ddev, "config %d has an invalid " |
| "interface descriptor of length %d, " |
| "skipping\n", cfgno, d->bLength); |
| continue; |
| } |
| |
| inum = d->bInterfaceNumber; |
| |
| if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) && |
| n >= nintf_orig) { |
| dev_warn(ddev, "config %d has more interface " |
| "descriptors, than it declares in " |
| "bNumInterfaces, ignoring interface " |
| "number: %d\n", cfgno, inum); |
| continue; |
| } |
| |
| if (inum >= nintf_orig) |
| dev_warn(ddev, "config %d has an invalid " |
| "interface number: %d but max is %d\n", |
| cfgno, inum, nintf_orig - 1); |
| |
| /* Have we already encountered this interface? |
| * Count its altsettings */ |
| for (i = 0; i < n; ++i) { |
| if (inums[i] == inum) |
| break; |
| } |
| if (i < n) { |
| if (nalts[i] < 255) |
| ++nalts[i]; |
| } else if (n < USB_MAXINTERFACES) { |
| inums[n] = inum; |
| nalts[n] = 1; |
| ++n; |
| } |
| |
| } else if (header->bDescriptorType == |
| USB_DT_INTERFACE_ASSOCIATION) { |
| if (iad_num == USB_MAXIADS) { |
| dev_warn(ddev, "found more Interface " |
| "Association Descriptors " |
| "than allocated for in " |
| "configuration %d\n", cfgno); |
| } else { |
| config->intf_assoc[iad_num] = |
| (struct usb_interface_assoc_descriptor |
| *)header; |
| iad_num++; |
| } |
| |
| } else if (header->bDescriptorType == USB_DT_DEVICE || |
| header->bDescriptorType == USB_DT_CONFIG) |
| dev_warn(ddev, "config %d contains an unexpected " |
| "descriptor of type 0x%X, skipping\n", |
| cfgno, header->bDescriptorType); |
| |
| } /* for ((buffer2 = buffer, size2 = size); ...) */ |
| size = buffer2 - buffer; |
| config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0); |
| |
| if (n != nintf) |
| dev_warn(ddev, "config %d has %d interface%s, different from " |
| "the descriptor's value: %d\n", |
| cfgno, n, plural(n), nintf_orig); |
| else if (n == 0) |
| dev_warn(ddev, "config %d has no interfaces?\n", cfgno); |
| config->desc.bNumInterfaces = nintf = n; |
| |
| /* Check for missing interface numbers */ |
| for (i = 0; i < nintf; ++i) { |
| for (j = 0; j < nintf; ++j) { |
| if (inums[j] == i) |
| break; |
| } |
| if (j >= nintf) |
| dev_warn(ddev, "config %d has no interface number " |
| "%d\n", cfgno, i); |
| } |
| |
| /* Allocate the usb_interface_caches and altsetting arrays */ |
| for (i = 0; i < nintf; ++i) { |
| j = nalts[i]; |
| if (j > USB_MAXALTSETTING) { |
| dev_warn(ddev, "too many alternate settings for " |
| "config %d interface %d: %d, " |
| "using maximum allowed: %d\n", |
| cfgno, inums[i], j, USB_MAXALTSETTING); |
| nalts[i] = j = USB_MAXALTSETTING; |
| } |
| |
| len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j; |
| config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL); |
| if (!intfc) |
| return -ENOMEM; |
| kref_init(&intfc->ref); |
| } |
| |
| /* FIXME: parse the BOS descriptor */ |
| |
| /* Skip over any Class Specific or Vendor Specific descriptors; |
| * find the first interface descriptor */ |
| config->extra = buffer; |
| i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, |
| USB_DT_INTERFACE, &n); |
| config->extralen = i; |
| if (n > 0) |
| dev_dbg(ddev, "skipped %d descriptor%s after %s\n", |
| n, plural(n), "configuration"); |
| buffer += i; |
| size -= i; |
| |
| /* Parse all the interface/altsetting descriptors */ |
| while (size > 0) { |
| retval = usb_parse_interface(ddev, cfgno, config, |
| buffer, size, inums, nalts); |
| if (retval < 0) |
| return retval; |
| |
| buffer += retval; |
| size -= retval; |
| } |
| |
| /* Check for missing altsettings */ |
| for (i = 0; i < nintf; ++i) { |
| intfc = config->intf_cache[i]; |
| for (j = 0; j < intfc->num_altsetting; ++j) { |
| for (n = 0; n < intfc->num_altsetting; ++n) { |
| if (intfc->altsetting[n].desc. |
| bAlternateSetting == j) |
| break; |
| } |
| if (n >= intfc->num_altsetting) |
| dev_warn(ddev, "config %d interface %d has no " |
| "altsetting %d\n", cfgno, inums[i], j); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* hub-only!! ... and only exported for reset/reinit path. |
| * otherwise used internally on disconnect/destroy path |
| */ |
| void usb_destroy_configuration(struct usb_device *dev) |
| { |
| int c, i; |
| |
| if (!dev->config) |
| return; |
| |
| if (dev->rawdescriptors) { |
| for (i = 0; i < dev->descriptor.bNumConfigurations; i++) |
| kfree(dev->rawdescriptors[i]); |
| |
| kfree(dev->rawdescriptors); |
| dev->rawdescriptors = NULL; |
| } |
| |
| for (c = 0; c < dev->descriptor.bNumConfigurations; c++) { |
| struct usb_host_config *cf = &dev->config[c]; |
| |
| kfree(cf->string); |
| for (i = 0; i < cf->desc.bNumInterfaces; i++) { |
| if (cf->intf_cache[i]) |
| kref_put(&cf->intf_cache[i]->ref, |
| usb_release_interface_cache); |
| } |
| } |
| kfree(dev->config); |
| dev->config = NULL; |
| } |
| |
| |
| /* |
| * Get the USB config descriptors, cache and parse'em |
| * |
| * hub-only!! ... and only in reset path, or usb_new_device() |
| * (used by real hubs and virtual root hubs) |
| */ |
| int usb_get_configuration(struct usb_device *dev) |
| { |
| struct device *ddev = &dev->dev; |
| int ncfg = dev->descriptor.bNumConfigurations; |
| int result = 0; |
| unsigned int cfgno, length; |
| unsigned char *bigbuffer; |
| struct usb_config_descriptor *desc; |
| |
| cfgno = 0; |
| result = -ENOMEM; |
| if (ncfg > USB_MAXCONFIG) { |
| dev_warn(ddev, "too many configurations: %d, " |
| "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG); |
| dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG; |
| } |
| |
| if (ncfg < 1) { |
| dev_err(ddev, "no configurations\n"); |
| return -EINVAL; |
| } |
| |
| length = ncfg * sizeof(struct usb_host_config); |
| dev->config = kzalloc(length, GFP_KERNEL); |
| if (!dev->config) |
| goto err2; |
| |
| length = ncfg * sizeof(char *); |
| dev->rawdescriptors = kzalloc(length, GFP_KERNEL); |
| if (!dev->rawdescriptors) |
| goto err2; |
| |
| desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL); |
| if (!desc) |
| goto err2; |
| |
| result = 0; |
| for (; cfgno < ncfg; cfgno++) { |
| /* We grab just the first descriptor so we know how long |
| * the whole configuration is */ |
| result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, |
| desc, USB_DT_CONFIG_SIZE); |
| if (result < 0) { |
| dev_err(ddev, "unable to read config index %d " |
| "descriptor/%s: %d\n", cfgno, "start", result); |
| if (result != -EPIPE) |
| goto err; |
| dev_err(ddev, "chopping to %d config(s)\n", cfgno); |
| dev->descriptor.bNumConfigurations = cfgno; |
| break; |
| } else if (result < 4) { |
| dev_err(ddev, "config index %d descriptor too short " |
| "(expected %i, got %i)\n", cfgno, |
| USB_DT_CONFIG_SIZE, result); |
| result = -EINVAL; |
| goto err; |
| } |
| length = max((int) le16_to_cpu(desc->wTotalLength), |
| USB_DT_CONFIG_SIZE); |
| |
| /* Now that we know the length, get the whole thing */ |
| bigbuffer = kmalloc(length, GFP_KERNEL); |
| if (!bigbuffer) { |
| result = -ENOMEM; |
| goto err; |
| } |
| |
| if (dev->quirks & USB_QUIRK_DELAY_INIT) |
| msleep(100); |
| |
| result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, |
| bigbuffer, length); |
| if (result < 0) { |
| dev_err(ddev, "unable to read config index %d " |
| "descriptor/%s\n", cfgno, "all"); |
| kfree(bigbuffer); |
| goto err; |
| } |
| if (result < length) { |
| dev_warn(ddev, "config index %d descriptor too short " |
| "(expected %i, got %i)\n", cfgno, length, result); |
| length = result; |
| } |
| |
| dev->rawdescriptors[cfgno] = bigbuffer; |
| |
| result = usb_parse_configuration(dev, cfgno, |
| &dev->config[cfgno], bigbuffer, length); |
| if (result < 0) { |
| ++cfgno; |
| goto err; |
| } |
| } |
| result = 0; |
| |
| err: |
| kfree(desc); |
| dev->descriptor.bNumConfigurations = cfgno; |
| err2: |
| if (result == -ENOMEM) |
| dev_err(ddev, "out of memory\n"); |
| return result; |
| } |
| |
| void usb_release_bos_descriptor(struct usb_device *dev) |
| { |
| if (dev->bos) { |
| kfree(dev->bos->desc); |
| kfree(dev->bos); |
| dev->bos = NULL; |
| } |
| } |
| |
| /* Get BOS descriptor set */ |
| int usb_get_bos_descriptor(struct usb_device *dev) |
| { |
| struct device *ddev = &dev->dev; |
| struct usb_bos_descriptor *bos; |
| struct usb_dev_cap_header *cap; |
| unsigned char *buffer; |
| int length, total_len, num, i; |
| int ret; |
| |
| bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL); |
| if (!bos) |
| return -ENOMEM; |
| |
| /* Get BOS descriptor */ |
| ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE); |
| if (ret < USB_DT_BOS_SIZE) { |
| dev_err(ddev, "unable to get BOS descriptor\n"); |
| if (ret >= 0) |
| ret = -ENOMSG; |
| kfree(bos); |
| return ret; |
| } |
| |
| length = bos->bLength; |
| total_len = le16_to_cpu(bos->wTotalLength); |
| num = bos->bNumDeviceCaps; |
| kfree(bos); |
| if (total_len < length) |
| return -EINVAL; |
| |
| dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL); |
| if (!dev->bos) |
| return -ENOMEM; |
| |
| /* Now let's get the whole BOS descriptor set */ |
| buffer = kzalloc(total_len, GFP_KERNEL); |
| if (!buffer) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| dev->bos->desc = (struct usb_bos_descriptor *)buffer; |
| |
| ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len); |
| if (ret < total_len) { |
| dev_err(ddev, "unable to get BOS descriptor set\n"); |
| if (ret >= 0) |
| ret = -ENOMSG; |
| goto err; |
| } |
| total_len -= length; |
| |
| for (i = 0; i < num; i++) { |
| buffer += length; |
| cap = (struct usb_dev_cap_header *)buffer; |
| length = cap->bLength; |
| |
| if (total_len < length) |
| break; |
| total_len -= length; |
| |
| if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) { |
| dev_warn(ddev, "descriptor type invalid, skip\n"); |
| continue; |
| } |
| |
| switch (cap->bDevCapabilityType) { |
| case USB_CAP_TYPE_WIRELESS_USB: |
| /* Wireless USB cap descriptor is handled by wusb */ |
| break; |
| case USB_CAP_TYPE_EXT: |
| dev->bos->ext_cap = |
| (struct usb_ext_cap_descriptor *)buffer; |
| break; |
| case USB_SS_CAP_TYPE: |
| dev->bos->ss_cap = |
| (struct usb_ss_cap_descriptor *)buffer; |
| break; |
| case USB_SSP_CAP_TYPE: |
| dev->bos->ssp_cap = |
| (struct usb_ssp_cap_descriptor *)buffer; |
| break; |
| case CONTAINER_ID_TYPE: |
| dev->bos->ss_id = |
| (struct usb_ss_container_id_descriptor *)buffer; |
| break; |
| case USB_PTM_CAP_TYPE: |
| dev->bos->ptm_cap = |
| (struct usb_ptm_cap_descriptor *)buffer; |
| default: |
| break; |
| } |
| } |
| |
| return 0; |
| |
| err: |
| usb_release_bos_descriptor(dev); |
| return ret; |
| } |