| 1 | #include "transfer_descriptor.h"
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| 2 |
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| 3 | void transfer_descriptor_init(transfer_descriptor_t *instance,
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| 4 | int error_count, size_t size, bool isochronous, usb_target_t target,
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| 5 | int pid, void *buffer)
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| 6 | {
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| 7 | assert(instance);
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| 8 |
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| 9 | instance->next =
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| 10 | 0 | LINK_POINTER_TERMINATE_FLAG;
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| 11 |
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| 12 | uhci_print_verbose("Creating link field: %x.\n", instance->next);
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| 13 |
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| 14 | assert(size < 1024);
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| 15 | instance->status = 0
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| 16 | | ((error_count & TD_STATUS_ERROR_COUNT_MASK) << TD_STATUS_ERROR_COUNT_POS)
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| 17 | | TD_STATUS_ERROR_ACTIVE;
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| 18 |
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| 19 | uhci_print_verbose("Creating status field: %x.\n", instance->status);
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| 20 |
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| 21 | instance->device = 0
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| 22 | | (((size - 1) & TD_DEVICE_MAXLEN_MASK) << TD_DEVICE_MAXLEN_POS)
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| 23 | | ((target.address & TD_DEVICE_ADDRESS_MASK) << TD_DEVICE_ADDRESS_POS)
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| 24 | | ((target.endpoint & TD_DEVICE_ENDPOINT_MASK) << TD_DEVICE_ENDPOINT_POS)
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| 25 | | ((pid & TD_DEVICE_PID_MASK) << TD_DEVICE_PID_POS);
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| 26 |
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| 27 | uhci_print_verbose("Creating device field: %x.\n", instance->device);
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| 28 |
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| 29 | instance->buffer_ptr = (uintptr_t)addr_to_phys(buffer);
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| 30 |
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| 31 | uhci_print_verbose("Creating buffer field: %p(%p).\n",
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| 32 | buffer, instance->buffer_ptr);
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| 33 |
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| 34 | char * buff = buffer;
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| 35 |
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| 36 | uhci_print_verbose("Buffer dump(8B): %x %x %x %x %x %x %x %x.\n",
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| 37 | buff[0], buff[1], buff[2], buff[3], buff[4], buff[5], buff[6], buff[7]);
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| 38 |
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| 39 | instance->next_va = NULL;
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| 40 | instance->callback = NULL;
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| 41 | }
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| 42 |
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| 43 | static inline usb_transaction_outcome_t convert_outcome(uint32_t status)
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| 44 | {
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| 45 | /*TODO: refactor into something sane */
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| 46 | /*TODO: add additional usb_errors to usb_outcome_t */
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| 47 |
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| 48 | if (status & TD_STATUS_ERROR_STALLED)
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| 49 | return USB_OUTCOME_CRCERROR;
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| 50 |
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| 51 | if (status & TD_STATUS_ERROR_BUFFER)
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| 52 | return USB_OUTCOME_CRCERROR;
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| 53 |
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| 54 | if (status & TD_STATUS_ERROR_BABBLE)
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| 55 | return USB_OUTCOME_BABBLE;
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| 56 |
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| 57 | if (status & TD_STATUS_ERROR_NAK)
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| 58 | return USB_OUTCOME_CRCERROR;
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| 59 |
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| 60 | if (status & TD_STATUS_ERROR_CRC)
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| 61 | return USB_OUTCOME_CRCERROR;
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| 62 |
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| 63 | if (status & TD_STATUS_ERROR_BIT_STUFF)
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| 64 | return USB_OUTCOME_CRCERROR;
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| 65 |
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| 66 | assert((((status >> TD_STATUS_ERROR_POS) & TD_STATUS_ERROR_MASK)
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| 67 | | TD_STATUS_ERROR_RESERVED) == TD_STATUS_ERROR_RESERVED);
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| 68 | return USB_OUTCOME_OK;
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| 69 | }
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| 70 |
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| 71 | void transfer_descriptor_fini(transfer_descriptor_t *instance)
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| 72 | {
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| 73 | assert(instance);
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| 74 | callback_run(instance->callback,
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| 75 | convert_outcome(instance->status),
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| 76 | instance->status >> TD_STATUS_ACTLEN_POS & TD_STATUS_ACTLEN_MASK
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| 77 | );
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| 78 | }
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