| /* Code to control the PERST lines of attached modems |
| * |
| * Depending on the board this is running on, it might be possible |
| * for the controller to set the status of the PERST input line of |
| * the cellular modem. If the board supports this, it sets the |
| * PIN_PERST1 and/or PIN_PERST2 defines in its board.h file. |
| */ |
| |
| #include "board.h" |
| #include "wwan_perst.h" |
| #include "osmocom/core/timer.h" |
| |
| #define PERST_DURATION_MS 300 |
| |
| #ifdef PIN_PERST1 |
| static const Pin pin_perst1 = PIN_PERST1; |
| static struct osmo_timer_list perst1_timer; |
| #endif |
| |
| #ifdef PIN_PERST2 |
| static const Pin pin_perst2 = PIN_PERST2; |
| static struct osmo_timer_list perst2_timer; |
| #endif |
| |
| static void perst_tmr_cb(void *data) |
| { |
| const Pin *pin = data; |
| /* release the (low-active) reset */ |
| PIO_Clear(pin); |
| } |
| |
| int wwan_perst_do_reset(int modem_nr) |
| { |
| const Pin *pin; |
| struct osmo_timer_list *tmr; |
| |
| switch (modem_nr) { |
| #ifdef PIN_PERST1 |
| case 1: |
| pin = &pin_perst1; |
| tmr = &perst1_timer; |
| break; |
| #endif |
| #ifdef PIN_PERST2 |
| case 2: |
| pin = &pin_perst2; |
| tmr = &perst2_timer; |
| break; |
| #endif |
| default: |
| return -1; |
| } |
| PIO_Set(pin); |
| osmo_timer_schedule(tmr, PERST_DURATION_MS/1000, (PERST_DURATION_MS%1000)*1000); |
| |
| return 0; |
| } |
| |
| int wwan_perst_init(void) |
| { |
| int num_perst = 0; |
| #ifdef PIN_PERST1 |
| PIO_Configure(&pin_perst1, 1); |
| perst1_timer.cb = perst_tmr_cb; |
| perst1_timer.data = (void *) &pin_perst1; |
| num_perst++; |
| #endif |
| |
| #ifdef PIN_PERST2 |
| PIO_Configure(&pin_perst2, 1); |
| perst2_timer.cb = perst_tmr_cb; |
| perst2_timer.data = (void *) &pin_perst2; |
| num_perst++; |
| #endif |
| return num_perst; |
| } |