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cardem: Implement support for CEMU_FEAT_F_STATUS_IRQ

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If this feature flag is set by the host application, we will start
generating SIMTRACE_MSGT_BD_CEMU_STATUS towards the interrupt endpoint
on any changes to the SIM card status, such as change of VCC/CLK/RST

Change-Id: I832b4ac4aeb6152195d985067ffdd64fa5a7d4cc
Related: OS#4330
This commit is contained in:
Harald Welte
2019-12-16 10:53:22 +01:00
parent a5bbe78d2d
commit e213cc4f59
1 changed files with 13 additions and 1 deletions
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14
firmware/libcommon/source/card_emu.c
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@@ -38,7 +38,7 @@
#define NUM_SLOTS 2
/* bit-mask of supported CEMU_FEAT_F_ flags */
#define SUPPORTED_FEATURES 0
#define SUPPORTED_FEATURES (CEMU_FEAT_F_STATUS_IRQ)
#define ISO7816_3_INIT_WTIME 9600
#define ISO7816_3_DEFAULT_WI 10
@@ -1106,15 +1106,19 @@ static void card_emu_report_config(struct card_handle *ch)
/* hardware driver informs us that a card I/O signal has changed */
void card_emu_io_statechg(struct card_handle *ch, enum card_io io, int active)
{
uint32_t chg_mask = 0;
switch (io) {
case CARD_IO_VCC:
if (active == 0 && ch->vcc_active == 1) {
TRACE_INFO("%u: VCC deactivated\r\n", ch->num);
card_handle_reset(ch);
card_set_state(ch, ISO_S_WAIT_POWER);
chg_mask |= CEMU_STATUS_F_VCC_PRESENT;
} else if (active == 1 && ch->vcc_active == 0) {
TRACE_INFO("%u: VCC activated\r\n", ch->num);
card_set_state(ch, ISO_S_WAIT_CLK);
chg_mask |= CEMU_STATUS_F_VCC_PRESENT;
}
ch->vcc_active = active;
break;
@@ -1123,8 +1127,10 @@ void card_emu_io_statechg(struct card_handle *ch, enum card_io io, int active)
TRACE_INFO("%u: CLK activated\r\n", ch->num);
if (ch->state == ISO_S_WAIT_CLK)
card_set_state(ch, ISO_S_WAIT_RST);
chg_mask |= CEMU_STATUS_F_CLK_ACTIVE;
} else if (active == 0 && ch->clocked == 1) {
TRACE_INFO("%u: CLK deactivated\r\n", ch->num);
chg_mask |= CEMU_STATUS_F_CLK_ACTIVE;
}
ch->clocked = active;
break;
@@ -1137,9 +1143,11 @@ void card_emu_io_statechg(struct card_handle *ch, enum card_io io, int active)
/* prepare to send the ATR */
card_set_state(ch, ISO_S_WAIT_ATR);
}
chg_mask |= CEMU_STATUS_F_RESET_ACTIVE;
} else if (active && !ch->in_reset) {
TRACE_INFO("%u: RST asserted\r\n", ch->num);
card_handle_reset(ch);
chg_mask |= CEMU_STATUS_F_RESET_ACTIVE;
}
ch->in_reset = active;
break;
@@ -1159,6 +1167,10 @@ void card_emu_io_statechg(struct card_handle *ch, enum card_io io, int active)
default:
break;
}
/* notify the host about the state change */
if ((ch->features & CEMU_FEAT_F_STATUS_IRQ) && chg_mask)
card_emu_report_status(ch, true);
}
/* User sets a new ATR to be returned during next card reset */