misc/sysmobts_misc.c: Read temperature from microcontroller

Add function for requesting the temperature information to the
microcontroller. I have added a function that we can extend
for requesting more information but in this case we only need to
know the temperature.
I have added to a microcontroller temperature handling function
in the manager for monitoring this information.

Signed-off-by: Alvaro Neira Ayuso <anayuso@sysmocom.de>

1 files changed, 172 insertions, 0 deletions

diff --git a/src/osmo-bts-sysmo/misc/sysmobts_misc.c b/src/osmo-bts-sysmo/misc/sysmobts_misc.c
index c043045a..55a7a2a6 100644
--- a/src/osmo-bts-sysmo/misc/sysmobts_misc.c
+++ b/src/osmo-bts-sysmo/misc/sysmobts_misc.c
@@ -32,14 +32,186 @@
 
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/utils.h>
+#include <osmocom/core/msgb.h>
 #include <osmocom/core/application.h>
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
 
+#include "btsconfig.h"
 #include "sysmobts_misc.h"
 #include "sysmobts_par.h"
 #include "sysmobts_mgr.h"
 
+#ifdef BUILD_SBTS2050
+#include <sysmocom/femtobts/sbts2050_header.h>
+#endif
+
+#define SERIAL_ALLOC_SIZE	300
+#define SIZE_HEADER_RSP		5
+#define SIZE_HEADER_CMD		4
+
+
+#ifdef BUILD_SBTS2050
+/**********************************************************************
+ *	Functions read/write from serial interface
+ *********************************************************************/
+static int hand_serial_read(int fd, struct msgb *msg, int numbytes)
+{
+	int rc, bread = 0;
+
+	if (numbytes > msgb_tailroom(msg))
+		return -ENOSPC;
+
+	while (bread < numbytes) {
+		rc = read(fd, msg->tail, numbytes - bread);
+		if (rc < 0)
+			return -1;
+		if (rc == 0)
+			break;
+
+		bread += rc;
+		msgb_put(msg, rc);
+	}
+
+	return bread;
+}
+
+static int hand_serial_write(int fd, struct msgb *msg)
+{
+	int rc, bwritten = 0;
+
+	while (msg->len > 0) {
+		rc = write(fd, msg->data, msg->len);
+		if (rc <= 0)
+			return -1;
+
+		msgb_pull(msg, rc);
+		bwritten += rc;
+	}
+
+	return bwritten;
+}
+
+/**********************************************************************
+ *	Functions request information to Microcontroller
+ *********************************************************************/
+static void add_parity(cmdpkt_t *command)
+{
+	int n;
+	uint8_t parity = 0x00;
+	for (n = 0; n < SIZE_HEADER_CMD+command->u8Len; n++)
+		parity ^= ((uint8_t *)command)[n];
+
+	command->cmd.raw[command->u8Len] = parity;
+}
+
+static struct msgb *sbts2050_ucinfo_get(struct uc *ucontrol, struct ucinfo info)
+{
+	int num, rc;
+	cmdpkt_t *command;
+	rsppkt_t *response;
+	struct msgb *msg;
+	fd_set fdread;
+	struct timeval tout = {
+		.tv_sec = 10,
+	};
+
+	switch (info.id) {
+	case SBTS2050_TEMP_RQT:
+		num = sizeof(command->cmd.tempGet);
+		break;
+	default:
+		return NULL;
+	}
+	num = num + SIZE_HEADER_CMD+1;
+
+	msg = msgb_alloc(SERIAL_ALLOC_SIZE, "Message Microcontroller");
+	if (msg == NULL) {
+		LOGP(DTEMP, LOGL_ERROR, "Error creating msg\n");
+		return NULL;
+	}
+	command = (cmdpkt_t *) msgb_put(msg, num);
+
+	command->u16Magic = 0xCAFE;
+	switch (info.id) {
+	case SBTS2050_TEMP_RQT:
+		command->u8Id = info.id;
+		command->u8Len = sizeof(command->cmd.tempGet);
+		break;
+	default:
+		goto err;
+	}
+
+	add_parity(command);
+
+	if (hand_serial_write(ucontrol->fd, msg) < 0)
+		goto err;
+
+	msgb_reset(msg);
+
+	FD_ZERO(&fdread);
+	FD_SET(ucontrol->fd, &fdread);
+
+	num = SIZE_HEADER_RSP;
+	while (1) {
+		rc = select(ucontrol->fd+1, &fdread, NULL, NULL, &tout);
+		if (rc > 0) {
+			if (hand_serial_read(ucontrol->fd, msg, num) < 0)
+				goto err;
+
+			response = (rsppkt_t *)msg->data;
+
+			if (response->u8Id != info.id || msg->len <= 0 ||
+			    response->i8Error != RQT_SUCCESS)
+				goto err;
+
+			if (msg->len == SIZE_HEADER_RSP + response->u8Len + 1)
+				break;
+
+			num = response->u8Len + 1;
+		} else
+			goto err;
+	}
+
+	return msg;
+
+err:
+	msgb_free(msg);
+	return NULL;
+}
+#endif
+
+/**********************************************************************
+ *	Uc temperature handling
+ *********************************************************************/
+void sbts2050_uc_check_temp(struct uc *ucontrol, int *temp_pa, int *temp_board)
+{
+#ifdef BUILD_SBTS2050
+	rsppkt_t *response;
+	struct msgb *msg;
+	struct ucinfo info = {
+		.id = SBTS2050_TEMP_RQT,
+	};
+
+	msg = sbts2050_ucinfo_get(ucontrol, info);
+
+	if (msg == NULL) {
+		LOGP(DTEMP, LOGL_ERROR, "Error reading temperature\n");
+		return;
+	}
+
+	response = (rsppkt_t *)msg->data;
+
+	*temp_board = response->rsp.tempGet.i8BrdTemp;
+	*temp_pa = response->rsp.tempGet.i8PaTemp;
+
+	LOGP(DTEMP, LOGL_DEBUG, "Temperature Board: %+3d C\n"
+				"Tempeture PA: %+3d C\n",
+				 response->rsp.tempGet.i8BrdTemp,
+				 response->rsp.tempGet.i8PaTemp);
+	msgb_free(msg);
+#endif
+}
 
 /*********************************************************************
  * Temperature handling