Fork us on GitHub Follow us on Facebook Follow us on Twitter

Changeset a91fbb1 in mainline for uspace/drv/usbhub/utils.c


Ignore:
Timestamp:
2011-04-15T20:53:17Z (11 years ago)
Author:
Vojtech Horky <vojtechhorky@…>
Branches:
lfn, master
Children:
2c2cbcf
Parents:
27b85d9 (diff), 8595577b (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Merge development/ changes

File:
1 edited

Legend:

Unmodified
Added
Removed
  • uspace/drv/usbhub/utils.c

    r27b85d9 ra91fbb1  
    5656//hub descriptor utils
    5757
    58 void * usb_serialize_hub_descriptor(usb_hub_descriptor_t * descriptor) {
     58/**
     59 * create uint8_t array with serialized descriptor
     60 *
     61 * @param descriptor
     62 * @return newly created serializd descriptor pointer
     63 */
     64void * usb_create_serialized_hub_descriptor(usb_hub_descriptor_t * descriptor) {
    5965        //base size
    6066        size_t size = 7;
     
    6470        uint8_t * result = malloc(size);
    6571        //size
    66         result[0] = size;
     72        if(result)
     73                usb_serialize_hub_descriptor(descriptor,result);
     74        return result;
     75}
     76
     77/**
     78 * serialize descriptor into given buffer
     79 *
     80 * The buffer size is not checked.
     81 * @param descriptor
     82 * @param serialized_descriptor
     83 */
     84void usb_serialize_hub_descriptor(usb_hub_descriptor_t * descriptor,
     85    void * serialized_descriptor) {
     86        //base size
     87        uint8_t * sdescriptor = serialized_descriptor;
     88        size_t size = 7;
     89        //variable size according to port count
     90        size_t var_size = (descriptor->ports_count+7)/8;
     91        size += 2 * var_size;
     92        //size
     93        sdescriptor[0] = size;
    6794        //descriptor type
    68         result[1] = USB_DESCTYPE_HUB;
    69         result[2] = descriptor->ports_count;
     95        sdescriptor[1] = USB_DESCTYPE_HUB;
     96        sdescriptor[2] = descriptor->ports_count;
    7097        /// @fixme handling of endianness??
    71         result[3] = descriptor->hub_characteristics / 256;
    72         result[4] = descriptor->hub_characteristics % 256;
    73         result[5] = descriptor->pwr_on_2_good_time;
    74         result[6] = descriptor->current_requirement;
     98        sdescriptor[3] = descriptor->hub_characteristics / 256;
     99        sdescriptor[4] = descriptor->hub_characteristics % 256;
     100        sdescriptor[5] = descriptor->pwr_on_2_good_time;
     101        sdescriptor[6] = descriptor->current_requirement;
    75102
    76103        size_t i;
    77104        for (i = 0; i < var_size; ++i) {
    78                 result[7 + i] = descriptor->devices_removable[i];
     105                sdescriptor[7 + i] = descriptor->devices_removable[i];
    79106        }
    80107        for (i = 0; i < var_size; ++i) {
    81                 result[7 + var_size + i] = 255;
     108                sdescriptor[7 + var_size + i] = 255;
    82109        }
    83         return result;
    84110}
    85111
    86 usb_hub_descriptor_t * usb_deserialize_hub_desriptor(
     112
     113/**
     114 * create deserialized desriptor structure out of serialized descriptor
     115 *
     116 * The serialized descriptor must be proper usb hub descriptor,
     117 * otherwise an eerror might occur.
     118 *
     119 * @param sdescriptor serialized descriptor
     120 * @return newly created deserialized descriptor pointer
     121 */
     122usb_hub_descriptor_t * usb_create_deserialized_hub_desriptor(
    87123void * serialized_descriptor) {
    88124        uint8_t * sdescriptor = serialized_descriptor;
     
    95131
    96132        usb_hub_descriptor_t * result = malloc(sizeof(usb_hub_descriptor_t));
    97        
     133        if(result)
     134                usb_deserialize_hub_desriptor(serialized_descriptor,result);
     135        return result;
     136}
    98137
    99         result->ports_count = sdescriptor[2];
     138/**
     139 * deserialize descriptor into given pointer
     140 *
     141 * @param serialized_descriptor
     142 * @param descriptor
     143 * @return
     144 */
     145void usb_deserialize_hub_desriptor(
     146void * serialized_descriptor, usb_hub_descriptor_t * descriptor) {
     147        uint8_t * sdescriptor = serialized_descriptor;
     148        descriptor->ports_count = sdescriptor[2];
    100149        /// @fixme handling of endianness??
    101         result->hub_characteristics = sdescriptor[4] + 256 * sdescriptor[3];
    102         result->pwr_on_2_good_time = sdescriptor[5];
    103         result->current_requirement = sdescriptor[6];
    104         size_t var_size = (result->ports_count+7) / 8;
    105         result->devices_removable = (uint8_t*) malloc(var_size);
     150        descriptor->hub_characteristics = sdescriptor[4] + 256 * sdescriptor[3];
     151        descriptor->pwr_on_2_good_time = sdescriptor[5];
     152        descriptor->current_requirement = sdescriptor[6];
     153        size_t var_size = (descriptor->ports_count+7) / 8;
     154        //descriptor->devices_removable = (uint8_t*) malloc(var_size);
    106155
    107156        size_t i;
    108157        for (i = 0; i < var_size; ++i) {
    109                 result->devices_removable[i] = sdescriptor[7 + i];
     158                descriptor->devices_removable[i] = sdescriptor[7 + i];
    110159        }
    111         return result;
    112160}
    113 
    114 
    115161
    116162/**
Note: See TracChangeset for help on using the changeset viewer.