Change in osmo-ccid-firmware[master]: cuart: allow getting the icc baud rate and clock freq

[Hoernchen]

Hoernchen has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/osmo-ccid-firmware/+/16290 )


Change subject: cuart: allow getting the icc baud rate and clock freq
......................................................................

cuart: allow getting the icc baud rate and clock freq

Change-Id: I577907e6c60582a80666d43b17c20de4e03cc8df
---
M ccid_common/cuart.h
M sysmoOCTSIM/cuart_driver_asf4_usart_async.c
2 files changed, 12 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ccid-firmware 
refs/changes/90/16290/1

diff --git a/ccid_common/cuart.h b/ccid_common/cuart.h
index c72b51c..6a782db 100644
--- a/ccid_common/cuart.h
+++ b/ccid_common/cuart.h
@@ -30,6 +30,8 @@
        CUART_CTL_RST,          /* enable/disable ICC reset */
        CUART_CTL_WTIME,        /* set the waiting time (in etu) */
        CUART_CTL_SET_FD,
+       CUART_CTL_GET_BAUDRATE,
+       CUART_CTL_GET_CLOCK_FREQ,
 };

 struct card_uart;
@@ -100,6 +102,7 @@
                        uint8_t slot_nr;
                        /* in us, required, no delay breaks _rx_ */
                        uint32_t extrawait_after_rx;
+                       uint32_t current_baudrate;
                } asf4;
        } u;
 };
diff --git a/sysmoOCTSIM/cuart_driver_asf4_usart_async.c 
b/sysmoOCTSIM/cuart_driver_asf4_usart_async.c
index db3dc79..f12ed73 100644
--- a/sysmoOCTSIM/cuart_driver_asf4_usart_async.c
+++ b/sysmoOCTSIM/cuart_driver_asf4_usart_async.c
@@ -203,6 +203,9 @@
        if (NULL == slot) {
                return false;
        }
+
+       // update cached values
+       cuart->u.asf4.current_baudrate = baudrate;
        printf("(%u) switching SERCOM clock to GCLK%u (freq = %lu kHz) and baud 
rate to %lu bps (baud = %u)\r\n", slotnr, (best + 1) * 2, 
(uint32_t)(round(sercom_glck_freqs[best] / 1000)), baudrate, bauds[best]);
        while (!usart_async_is_tx_empty(slot)); // wait for transmission to 
complete (WARNING no timeout)
        usart_async_disable(slot); // disable SERCOM peripheral
@@ -404,6 +407,12 @@
                uint32_t baudrate = (20e6/divider)/arg;
                cuart->u.asf4.extrawait_after_rx = 1./baudrate * 1000 * 1000;
                slot_set_baudrate(cuart->u.asf4.slot_nr, baudrate);
+       case CUART_CTL_GET_BAUDRATE:
+               return cuart->u.asf4.current_baudrate;
+               break;
+       case CUART_CTL_GET_CLOCK_FREQ:
+               ncn8025_get(cuart->u.asf4.slot_nr, &settings);
+               return 20e6 / ncn8025_div_val[settings.clkdiv];
                break;
        default:
                return -EINVAL;

--
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Gerrit-Project: osmo-ccid-firmware
Gerrit-Branch: master
Gerrit-Change-Id: I577907e6c60582a80666d43b17c20de4e03cc8df
Gerrit-Change-Number: 16290
Gerrit-PatchSet: 1
Gerrit-Owner: Hoernchen <ew...@sysmocom.de>
Gerrit-MessageType: newchange