Extract knowledge of RF path configurations from the RFFC5071 driver.

Change initial RF path mode to SWITCHCTRL_SAFE. (Previously started at SWITCHCTRL_SAFE and then immediately switched to SWITCHCTRL_AMP_BYPASS.)

firmware/common/rffc5071.c

@@ -145,11 +145,6 @@ void rffc5071_setup(void)
 	 * not control pins. */
 	set_RFFC5071_SIPIN(1);
 
-#ifdef JAWBREAKER
-	/* initial safe switch control settings */
-	rffc5071_set_gpo(SWITCHCTRL_SAFE);
-#endif
-
 	/* GPOs are active at all times */
 	set_RFFC5071_GATE(1);
 
@@ -367,56 +362,20 @@ void rffc5071_regs_commit(void)
 	}
 }
 
-void rffc5071_tx(uint8_t gpo) {
+void rffc5071_tx(void) {
 	LOG("# rffc5071_tx\n");
 	set_RFFC5071_ENBL(0);
 	set_RFFC5071_FULLD(0);
 	set_RFFC5071_MODE(1); /* mixer 2 used for both RX and TX */
-#ifdef JAWBREAKER
-	/* honor SWITCHCTRL_AMP_BYPASS and SWITCHCTRL_HP settings from caller */
-	gpo &= (SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_MIX_BYPASS);
-	if ((gpo & SWITCHCTRL_AMP_BYPASS) == SWITCHCTRL_AMP_BYPASS)
-		gpo |= SWITCHCTRL_NO_TX_AMP_PWR;
-	gpo |= (SWITCHCTRL_TX | SWITCHCTRL_NO_RX_AMP_PWR);
-	rffc5071_set_gpo(gpo);
-#else
-	(void)gpo;
-#endif
 	rffc5071_regs_commit();
-
-#ifdef JAWBREAKER
-	/* honor SWITCHCTRL_MIX_BYPASS setting from caller */
-	if ((gpo & SWITCHCTRL_MIX_BYPASS) == SWITCHCTRL_MIX_BYPASS)
-		rffc5071_disable();
-	else
-#endif
-		rffc5071_enable();
 }
 
-void rffc5071_rx(uint8_t gpo) {
+void rffc5071_rx(void) {
 	LOG("# rfc5071_rx\n");
 	set_RFFC5071_ENBL(0);
 	set_RFFC5071_FULLD(0);
 	set_RFFC5071_MODE(1); /* mixer 2 used for both RX and TX */
-#ifdef JAWBREAKER
-	/* honor SWITCHCTRL_AMP_BYPASS and SWITCHCTRL_HP settings from caller */
-	gpo &= (SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_MIX_BYPASS);
-	if ((gpo & SWITCHCTRL_AMP_BYPASS) == SWITCHCTRL_AMP_BYPASS)
-		gpo |= SWITCHCTRL_NO_RX_AMP_PWR;
-	gpo |= SWITCHCTRL_NO_TX_AMP_PWR;
-	rffc5071_set_gpo(gpo);
-#else
-	(void)gpo;
-#endif
 	rffc5071_regs_commit();
-
-#ifdef JAWBREAKER
-	/* honor SWITCHCTRL_MIX_BYPASS setting from caller */
-	if ((gpo & SWITCHCTRL_MIX_BYPASS) == SWITCHCTRL_MIX_BYPASS)
-		rffc5071_disable();
-	else
-#endif
-		rffc5071_enable();
 }
 
 /*

firmware/common/rffc5071.h

@@ -31,25 +31,6 @@ extern uint32_t rffc5071_regs_dirty;
 #define RFFC5071_REG_SET_CLEAN(r) rffc5071_regs_dirty &= ~(1UL<<r)
 #define RFFC5071_REG_SET_DIRTY(r) rffc5071_regs_dirty |= (1UL<<r)
 
-#ifdef JAWBREAKER
-/*
- * RF switches on Jawbreaker are controlled by General Purpose Outputs (GPO) on
- * the RFFC5072.
- */
-#define SWITCHCTRL_NO_TX_AMP_PWR (1 << 0) /* GPO1 turn off TX amp power */
-#define SWITCHCTRL_AMP_BYPASS    (1 << 1) /* GPO2 bypass amp section */
-#define SWITCHCTRL_TX            (1 << 2) /* GPO3 1 for TX mode, 0 for RX mode */
-#define SWITCHCTRL_MIX_BYPASS    (1 << 3) /* GPO4 bypass RFFC5072 mixer section */
-#define SWITCHCTRL_HP            (1 << 4) /* GPO5 1 for high-pass, 0 for low-pass */
-#define SWITCHCTRL_NO_RX_AMP_PWR (1 << 5) /* GPO6 turn off RX amp power */
-
-/*
- * Safe (initial) switch settings turn off both amplifiers and enable both amp
- * bypass and mixer bypass.
- */
-#define SWITCHCTRL_SAFE (SWITCHCTRL_NO_TX_AMP_PWR | SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_TX | SWITCHCTRL_MIX_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_NO_RX_AMP_PWR)
-#endif
-
 /* Initialize chip. Call _setup() externally, as it calls _init(). */
 extern void rffc5071_init(void);
 extern void rffc5071_setup(void);
@@ -72,8 +53,8 @@ extern uint32_t rffc5071_set_frequency(uint16_t mhz);
 
 /* Set up rx only, tx only, or full duplex. Chip should be disabled
  * before _tx, _rx, or _rxtx are called. */
-extern void rffc5071_tx(uint8_t);
+extern void rffc5071_tx(void);
-extern void rffc5071_rx(uint8_t);
+extern void rffc5071_rx(void);
 extern void rffc5071_rxtx(void);
 extern void rffc5071_enable(void);
 extern void rffc5071_disable(void);

firmware/hackrf_usb/hackrf_usb.c

@@ -74,14 +74,65 @@ typedef struct {
 
 set_sample_r_params_t set_sample_r_params;
 
-uint8_t switchctrl = 0;
+#ifdef JAWBREAKER
+/*
+ * RF switches on Jawbreaker are controlled by General Purpose Outputs (GPO) on
+ * the RFFC5072.
+ */
+#define SWITCHCTRL_NO_TX_AMP_PWR (1 << 0) /* GPO1 turn off TX amp power */
+#define SWITCHCTRL_AMP_BYPASS    (1 << 1) /* GPO2 bypass amp section */
+#define SWITCHCTRL_TX            (1 << 2) /* GPO3 1 for TX mode, 0 for RX mode */
+#define SWITCHCTRL_MIX_BYPASS    (1 << 3) /* GPO4 bypass RFFC5072 mixer section */
+#define SWITCHCTRL_HP            (1 << 4) /* GPO5 1 for high-pass, 0 for low-pass */
+#define SWITCHCTRL_NO_RX_AMP_PWR (1 << 5) /* GPO6 turn off RX amp power */
+
+/*
+ * Safe (initial) switch settings turn off both amplifiers and enable both amp
+ * bypass and mixer bypass.
+ */
+#define SWITCHCTRL_SAFE (SWITCHCTRL_NO_TX_AMP_PWR | SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_TX | SWITCHCTRL_MIX_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_NO_RX_AMP_PWR)
+#endif
+
+uint8_t switchctrl = SWITCHCTRL_SAFE;
 
 void update_switches(void)
 {
 	if (transceiver_mode == TRANSCEIVER_MODE_RX) {
-		rffc5071_rx(switchctrl);
+		rffc5071_rx();
+#ifdef JAWBREAKER
+		/* honor SWITCHCTRL_AMP_BYPASS and SWITCHCTRL_HP settings from caller */
+		switchctrl &= (SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_MIX_BYPASS);
+		if ((switchctrl & SWITCHCTRL_AMP_BYPASS) == SWITCHCTRL_AMP_BYPASS)
+			switchctrl |= SWITCHCTRL_NO_RX_AMP_PWR;
+		switchctrl |= SWITCHCTRL_NO_TX_AMP_PWR;
+		rffc5071_set_gpo(switchctrl);
+#endif
+		
+#ifdef JAWBREAKER
+		/* honor SWITCHCTRL_MIX_BYPASS setting from caller */
+		if ((switchctrl & SWITCHCTRL_MIX_BYPASS) == SWITCHCTRL_MIX_BYPASS)
+			rffc5071_disable();
+		else
+#endif
+			rffc5071_enable();
 	} else if (transceiver_mode == TRANSCEIVER_MODE_TX) {
-		rffc5071_tx(switchctrl);
+		rffc5071_tx();
+#ifdef JAWBREAKER
+		/* honor SWITCHCTRL_AMP_BYPASS and SWITCHCTRL_HP settings from caller */
+		switchctrl &= (SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_MIX_BYPASS);
+		if ((switchctrl & SWITCHCTRL_AMP_BYPASS) == SWITCHCTRL_AMP_BYPASS)
+			switchctrl |= SWITCHCTRL_NO_TX_AMP_PWR;
+		switchctrl |= (SWITCHCTRL_TX | SWITCHCTRL_NO_RX_AMP_PWR);
+		rffc5071_set_gpo(switchctrl);
+#endif
+		
+#ifdef JAWBREAKER
+		/* honor SWITCHCTRL_MIX_BYPASS setting from caller */
+		if ((switchctrl & SWITCHCTRL_MIX_BYPASS) == SWITCHCTRL_MIX_BYPASS)
+			rffc5071_disable();
+		else
+#endif
+			rffc5071_enable();
 	}
 }
 
@@ -1000,9 +1051,9 @@ int main(void) {
 	max2837_set_frequency(ifreq);
 
 	rffc5071_setup();
-
 #ifdef JAWBREAKER
-	switchctrl = SWITCHCTRL_AMP_BYPASS;
+	/* initial safe switch control settings */
+	rffc5071_set_gpo(switchctrl);
 #endif
 
 	while(true) {