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osmo-ccid-firmware
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slot fsm: fake ccid setparameter response 

This secretly disables the PPS exchange to set a different baud rate and
ensures proper multislot operation at the default rate @ 2.5Mhz.

Change-Id: I72bd2bbabe55c00e771626d2e473f6f8e88793d2
This commit is contained in:
Eric Wild 2021-11-27 13:08:33 +01:00 committed by laforge
parent a6b35941d2
commit 90343f9669
1 changed files with 16 additions and 0 deletions
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16
ccid_common/ccid_slot_fsm.c
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@ -32,6 +32,8 @@
#include "iso7816_fsm.h"
#include "iso7816_3.h"
#define FAKE_CCID_SETPARAMETERS
struct iso_fsm_slot {
/* CCID slot above us */
struct ccid_slot *cs;
@ -280,11 +282,20 @@ static int iso_handle_fsm_events(struct ccid_slot *cs, bool enable){
* - after ATR while card is idle
* - after PPS while card is idle
*/
#ifndef FAKE_CCID_SETPARAMETERS
card_uart_ctrl(ss->cuart, CUART_CTL_SET_CLOCK_FREQ, fmax);
card_uart_ctrl(ss->cuart, CUART_CTL_SET_FD, F/D);
card_uart_ctrl(ss->cuart, CUART_CTL_WTIME, cs->proposed_pars.t0.waiting_integer * 960 * D_or_one);
cs->pars = cs->proposed_pars;
#else
//card_uart_ctrl(ss->cuart, CUART_CTL_SET_CLOCK_FREQ, fmax);
card_uart_ctrl(ss->cuart, CUART_CTL_SET_FD, F/D);
//card_uart_ctrl(ss->cuart, CUART_CTL_WTIME, cs->proposed_pars.t0.waiting_integer);
cs->pars.fi = cs->proposed_pars.fi;
cs->pars.di = cs->proposed_pars.di;
#endif
resp = ccid_gen_parameters_t0(cs, ss->seq, CCID_CMD_STATUS_OK, 0);
ccid_slot_send_unbusy(cs, resp);
@ -408,8 +419,13 @@ static int iso_fsm_slot_set_params(struct ccid_slot *cs, uint8_t seq, enum ccid_
LOGPCS(cs, LOGL_DEBUG, "scheduling PPS transfer, PPS1: %2x\n", PPS1);
#ifdef FAKE_CCID_SETPARAMETERS
ccid_slot_send_unbusy(cs, ccid_gen_parameters_t0(cs, ss->seq, CCID_CMD_STATUS_OK, 0));
#else
/* pass PPS1 instead of msgb */
osmo_fsm_inst_dispatch(ss->fi, ISO7816_E_XCEIVE_PPS_CMD, (void*)PPS1);
#endif
/* continues in iso_fsm_clot_user_cb once response/error/timeout is received */
return 0;
}