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QMOD: Add code to determine SIM Card presence

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This commit is contained in:
Harald Welte
2017-05-05 20:23:10 +02:00
parent 7e4390f181
commit 6d1128e9d1
5 changed files with 79 additions and 5 deletions
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3
firmware/libboard/qmod/source/board_qmod.c
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@@ -8,6 +8,7 @@
#include "wwan_led.h"
#include "wwan_perst.h"
#include "boardver_adc.h"
#include "card_pres.h"
#include "osmocom/core/timer.h"
static const Pin pin_hubpwr_override = PIN_PRTPWR_OVERRIDE;
@@ -257,4 +258,6 @@ void board_main_top(void)
/* Obtain the circuit board version (currently just prints voltage */
get_board_version_adc();
/* Initialize checking for card insert/remove events */
card_present_init();
}

58
firmware/libboard/qmod/source/card_pres.c Normal file
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@@ -0,0 +1,58 @@
#include <osmocom/core/timer.h>
#include "board.h"
#include "utils.h"
#include "card_pres.h"
#define NUM_CARDPRES 2
#define TIMER_INTERVAL_MS 500
static const Pin pin_cardpres[NUM_CARDPRES] = { PIN_DET_USIM1_PRES, PIN_DET_USIM2_PRES };
static int last_state[NUM_CARDPRES] = { -1, -1 };
static struct osmo_timer_list cardpres_timer;
/* Determine if a SIM card is present in the given slot */
int is_card_present(int port)
{
const Pin *pin;
int present;
if (port < 1 || port > NUM_CARDPRES)
return -1;
pin = &pin_cardpres[port-1];
/* Card present signals are low-active, as we have a switch
* against GND and an internal-pull-up in the SAM3 */
present = PIO_Get(pin) ? 0 : 1;
return present;
}
static void cardpres_tmr_cb(void *data)
{
unsigned int i;
for (i = 1; i <= ARRAY_SIZE(pin_cardpres); i++) {
int state = is_card_present(i);
if (state != last_state[i-1]) {
TRACE_INFO("Card Detect %d Status %d -> %d\r\n", i, last_state[i], state);
/* FIXME: report to USB host */
last_state[i-1] = state;
}
}
osmo_timer_schedule(&cardpres_timer, 0, TIMER_INTERVAL_MS*1000);
}
int card_present_init(void)
{
unsigned int i;
PIO_Configure(pin_cardpres, ARRAY_SIZE(pin_cardpres));
/* start timer */
cardpres_timer.cb = cardpres_tmr_cb;
osmo_timer_schedule(&cardpres_timer, 0, TIMER_INTERVAL_MS*1000);
return 2;
}