QMOD: Add code to determine SIM Card presence
diff --git a/firmware/libboard/qmod/source/board_qmod.c b/firmware/libboard/qmod/source/board_qmod.c
index 0d30ede..9f25a4b 100644
--- a/firmware/libboard/qmod/source/board_qmod.c
+++ b/firmware/libboard/qmod/source/board_qmod.c
@@ -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 @@
/* Obtain the circuit board version (currently just prints voltage */
get_board_version_adc();
+ /* Initialize checking for card insert/remove events */
+ card_present_init();
}
diff --git a/firmware/libboard/qmod/source/card_pres.c b/firmware/libboard/qmod/source/card_pres.c
new file mode 100644
index 0000000..344ab09
--- /dev/null
+++ b/firmware/libboard/qmod/source/card_pres.c
@@ -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;
+}