diff options
Diffstat (limited to 'ccid/ccid_device.c')
-rw-r--r-- | ccid/ccid_device.c | 110 |
1 files changed, 109 insertions, 1 deletions
diff --git a/ccid/ccid_device.c b/ccid/ccid_device.c index 70553b8..346f77d 100644 --- a/ccid/ccid_device.c +++ b/ccid/ccid_device.c @@ -11,6 +11,15 @@ #include "ccid_proto.h" #include "ccid_device.h" +/* local, stand-alone definition of a USB control request */ +struct _usb_ctrl_req { + uint8_t bRequestType; + uint8_t bRequest; + uint16_t wValue; + uint16_t wIndex; + uint16_t wLength; +} __attribute__ ((packed));; + /* decode on-the-wire T0 parameters into their parsed form */ static int decode_ccid_pars_t0(struct ccid_pars_decoded *out, const struct ccid_proto_data_t0 *in) { @@ -758,13 +767,112 @@ short_msg: return -1; } +/* Section 5.3.1 ABORT */ +static int ccid_handle_ctrl_abort(struct ccid_instance *ci, const struct _usb_ctrl_req *req) +{ + uint16_t w_value = osmo_load16le(&req->wValue); + uint8_t slot_nr = w_value & 0xff; + uint8_t seq = w_value >> 8; + struct ccid_slot *cs; + + if (slot_nr >= ARRAY_SIZE(ci->slot)) + return CCID_CTRL_RET_INVALID; + + cs = &ci->slot[slot_nr]; + + LOGP(DCCID, LOGL_NOTICE, "Not handling PC_to_RDR_Abort; please implement it\n"); + /* Upon receiving the Control pipe ABORT request the CCID should check + * the state of the requested slot. */ + + /* If the last Bulk-OUT message received by the CCID was a + * PC_to_RDR_Abort command with the same bSlot and bSeq as the ABORT + * request, then the CCID will respond to the Bulk-OUT message with + * the RDR_to_PC_SlotStatus response. */ + + /* FIXME */ + + /* If the previous Bulk-OUT message received by the CCID was not a + * PC_to_RDR_Abort command with the same bSlot and bSeq as the ABORT + * request, then the CCID will fail all Bulk-Out commands to that slot + * until the PC_to_RDR_Abort command with the same bSlot and bSeq is + * received. Bulk-OUT commands will be failed by sending a response + * with bmCommandStatus=Failed and bError=CMD_ABORTED. */ + + /* FIXME */ + return CCID_CTRL_RET_OK; +} + +/* Section 5.3.2 GET_CLOCK_FREQUENCIES */ +static int ccid_handle_ctrl_get_clock_freq(struct ccid_instance *ci, const struct _usb_ctrl_req *req, + const uint8_t **data_in) +{ + uint16_t len = osmo_load16le(&req->wLength); + + if (len != sizeof(uint32_t) * ci->class_desc->bNumClockSupported) + return CCID_CTRL_RET_INVALID; + + *data_in = (const uint8_t *) ci->clock_freqs; + return CCID_CTRL_RET_OK; +} + +/* Section 5.3.3 GET_DATA_RATES */ +static int ccid_handle_ctrl_get_data_rates(struct ccid_instance *ci, const struct _usb_ctrl_req *req, + const uint8_t **data_in) +{ + uint16_t len = osmo_load16le(&req->wLength); + + if (len != sizeof(uint32_t) * ci->class_desc->bNumClockSupported) + return CCID_CTRL_RET_INVALID; + + *data_in = (const uint8_t *) ci->data_rates; + return CCID_CTRL_RET_OK; +} + +/*! Handle [class specific] CTRL request. We assume the caller has already verified that the + * request was made to the correct interface as well as it is a class-specific request. + * \param[in] ci CCID Instance for which CTRL request was received + * \param[in] ctrl_req buffer holding the 8 bytes CTRL transfer header + * \param[out] data_in data to be returned to the host in the IN transaction (if any) + * \returns CCID_CTRL_RET_OK, CCID_CTRL_RET_INVALID or CCID_CTRL_RET_UNKNOWN + */ +int ccid_handle_ctrl(struct ccid_instance *ci, const uint8_t *ctrl_req, const uint8_t **data_in) +{ + const struct _usb_ctrl_req *req = (const struct _usb_ctrl_req *) ctrl_req; + int rc; + + LOGPCI(ci, LOGL_DEBUG, "CTRL bmReqT=0x%02X bRequest=%s, wValue=0x%04X, wIndex=0x%04X, wLength=%d\n", + req->bRequestType, get_value_string(ccid_class_spec_req_vals, req->bRequest), + req->wValue, req->wIndex, req->wLength); + + switch (req->bRequest) { + case CLASS_SPEC_CCID_ABORT: + rc = ccid_handle_ctrl_abort(ci, req); + break; + case CLASS_SPEC_CCID_GET_CLOCK_FREQ: + rc = ccid_handle_ctrl_get_clock_freq(ci, req, data_in); + break; + case CLASS_SPEC_CCID_GET_DATA_RATES: + rc = ccid_handle_ctrl_get_data_rates(ci, req, data_in); + break; + default: + return CCID_CTRL_RET_UNKNOWN; + } + return rc; +} + void ccid_instance_init(struct ccid_instance *ci, const struct ccid_ops *ops, - const struct ccid_slot_ops *slot_ops, const char *name, void *priv) + const struct ccid_slot_ops *slot_ops, + const struct usb_ccid_class_descriptor *class_desc, + const uint32_t *data_rates, const uint32_t *clock_freqs, + const char *name, void *priv) { int i; ci->ops = ops; ci->slot_ops = slot_ops; + ci->class_desc = class_desc; + ci->clock_freqs = clock_freqs; + ci->data_rates = data_rates; ci->name = name; ci->priv = priv; |