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https://gitea.osmocom.org/sim-card/simtrace2.git
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105 lines
2.0 KiB
C
105 lines
2.0 KiB
C
/* Code to control the PERST lines of attached modems
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*
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* Depending on the board this is running on, it might be possible
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* for the controller to set the status of the PERST input line of
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* the cellular modem. If the board supports this, it sets the
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* PIN_PERST1 and/or PIN_PERST2 defines in its board.h file.
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*/
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#include "board.h"
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#include "wwan_perst.h"
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#include "osmocom/core/timer.h"
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struct wwan_perst {
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const Pin pin;
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struct osmo_timer_list timer;
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};
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#ifdef PIN_PERST1
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static struct wwan_perst perst1 = {
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.pin = PIN_PERST1,
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};
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#endif
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#ifdef PIN_PERST2
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static struct wwan_perst perst2 = {
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.pin = PIN_PERST2,
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};
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#endif
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static int initialized = 0;
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static void perst_tmr_cb(void *data)
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{
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struct wwan_perst *perst = data;
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/* release the (low-active) reset */
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PIO_Clear(&perst->pin);
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}
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static struct wwan_perst *get_perst_for_modem(int modem_nr)
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{
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if (!initialized) {
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TRACE_ERROR("Somebody forgot to call wwan_perst_init()\r\n");
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wwan_perst_init();
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}
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switch (modem_nr) {
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#ifdef PIN_PERST1
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case 0:
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return &perst1;
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#endif
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#ifdef PIN_PERST2
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case 1:
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return &perst2;
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#endif
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default:
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return NULL;
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}
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}
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int wwan_perst_do_reset_pulse(int modem_nr, unsigned int duration_ms)
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{
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struct wwan_perst *perst = get_perst_for_modem(modem_nr);
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if (!perst)
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return -1;
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PIO_Set(&perst->pin);
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osmo_timer_schedule(&perst->timer, duration_ms/1000, (duration_ms%1000)*1000);
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return 0;
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}
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int wwan_perst_set(int modem_nr, int active)
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{
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struct wwan_perst *perst = get_perst_for_modem(modem_nr);
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if (!perst)
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return -1;
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osmo_timer_del(&perst->timer);
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if (active)
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PIO_Set(&perst->pin);
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else
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PIO_Clear(&perst->pin);
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return 0;
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}
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int wwan_perst_init(void)
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{
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int num_perst = 0;
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#ifdef PIN_PERST1
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PIO_Configure(&perst1.pin, 1);
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perst1.timer.cb = perst_tmr_cb;
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perst1.timer.data = (void *) &perst1;
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num_perst++;
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#endif
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#ifdef PIN_PERST2
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PIO_Configure(&perst2.pin, 1);
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perst2.timer.cb = perst_tmr_cb;
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perst2.timer.data = (void *) &perst2;
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num_perst++;
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#endif
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return num_perst;
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}
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