SWJ Frequency: Implement for cmsis-dap

src/platforms/hosted/cmsis_dap.c

@@ -271,7 +271,6 @@ int dap_enter_debug_swd(ADIv5_DP_t *dp)
 	if (!(dap_caps & DAP_CAP_SWD))
 		return -1;
 	mode =  DAP_CAP_SWD;
-	dap_swj_clock(2000000);
 	dap_transfer_configure(2, 128, 128);
 	dap_swd_configure(0);
 	dap_connect(false);
@@ -340,7 +339,6 @@ int cmsis_dap_jtagtap_init(jtag_proc_t *jtag_proc)
 	mode =  DAP_CAP_JTAG;
 	dap_disconnect();
 	dap_connect(true);
-	dap_swj_clock(2000000);
 	jtag_proc->jtagtap_reset       = cmsis_dap_jtagtap_reset;
 	jtag_proc->jtagtap_next        = cmsis_dap_jtagtap_next;
 	jtag_proc->jtagtap_tms_seq     = cmsis_dap_jtagtap_tms_seq;

src/platforms/hosted/cmsis_dap.h

@@ -29,6 +29,7 @@ void dap_exit_function(void);
 void dap_adiv5_dp_defaults(ADIv5_DP_t *dp);
 int cmsis_dap_jtagtap_init(jtag_proc_t *jtag_proc);
 int dap_jtag_dp_init(ADIv5_DP_t *dp);
+uint32_t dap_swj_clock(uint32_t clock);
 #else
 int dap_init(bmp_info_t *info)
 {
@@ -36,19 +37,15 @@ int dap_init(bmp_info_t *info)
 	(void)info;
 	return -1;
 }
-int dap_enter_debug_swd(ADIv5_DP_t *dp) {(void)dp; return -1;}
-void dap_exit_function(void) {return;};
-void dap_adiv5_dp_defaults(ADIv5_DP_t *dp) {(void)dp; return; }
-int cmsis_dap_jtagtap_init(jtag_proc_t *jtag_proc)
-{
-	(void)jtag_proc;
-	return -1;
-}
-int dap_jtag_dp_init(ADIv5_DP_t *dp)
-{
-	(void)dp;
-	return -1;
-}
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wunused-parameter"
+int dap_enter_debug_swd(ADIv5_DP_t *dp) {return -1;}
+uint32_t dap_swj_clock(uint32_t clock) {return 0;}
+void dap_exit_function(void) {};
+void dap_adiv5_dp_defaults(ADIv5_DP_t *dp) {};
+int cmsis_dap_jtagtap_init(jtag_proc_t *jtag_proc) {return -1;}
+int dap_jtag_dp_init(ADIv5_DP_t *dp) {return -1;}
+# pragma GCC diagnostic pop
 
 #endif
 

src/platforms/hosted/dap.c

@@ -203,18 +203,27 @@ void dap_disconnect(void)
 	dbg_dap_cmd(buf, sizeof(buf), 1);
 }
 
-//-----------------------------------------------------------------------------
-void dap_swj_clock(uint32_t clock)
+static uint32_t swj_clock;
+/* Set/Get JTAG/SWD clock frequency
+ *
+ * With clock == 0, return last set value.
+ */
+uint32_t dap_swj_clock(uint32_t clock)
 {
+	if (clock == 0)
+		return swj_clock;
 	uint8_t buf[5];
-
 	buf[0] = ID_DAP_SWJ_CLOCK;
 	buf[1] = clock & 0xff;
 	buf[2] = (clock >> 8) & 0xff;
 	buf[3] = (clock >> 16) & 0xff;
 	buf[4] = (clock >> 24) & 0xff;
 	dbg_dap_cmd(buf, sizeof(buf), 5);
-
+	if (buf[0])
+		DEBUG_WARN("dap_swj_clock failed\n");
+	else
+		swj_clock = clock;
+	return swj_clock;
 }
 
 //-----------------------------------------------------------------------------

src/platforms/hosted/dap.h

@@ -65,7 +65,6 @@ enum
 void dap_led(int index, int state);
 void dap_connect(bool jtag);
 void dap_disconnect(void);
-void dap_swj_clock(uint32_t clock);
 void dap_transfer_configure(uint8_t idle, uint16_t count, uint16_t retry);
 void dap_swd_configure(uint8_t cfg);
 int dap_info(int info, uint8_t *data, int size);

src/platforms/hosted/platform.c

@@ -328,6 +328,9 @@ void platform_max_frequency_set(uint32_t freq)
 	case BMP_TYPE_BMP:
 		remote_max_frequency_set(freq);
 		break;
+	case BMP_TYPE_CMSIS_DAP:
+		dap_swj_clock(freq);
+		break;
 	default:
 		DEBUG_WARN("Setting max SWJ frequency not yet implemented\n");
 		break;
@@ -339,6 +342,9 @@ uint32_t platform_max_frequency_get(void)
 	switch (info.bmp_type) {
 	case BMP_TYPE_BMP:
 		return remote_max_frequency_get();
+	case BMP_TYPE_CMSIS_DAP:
+		return dap_swj_clock(0);
+		break;
 	default:
 		DEBUG_WARN("Reading max SWJ frequency not yet implemented\n");
 		break;

src/platforms/pc/cl_utils.c

@@ -290,7 +290,6 @@ void cl_init(BMP_CL_OPTIONS_t *opt, int argc, char **argv)
 		DEBUG_WARN("Ignoring filename in reset/test mode\n");
 		opt->opt_flash_file = NULL;
 	}
-	DEBUG_WARN("opt freq %" PRIu32 "\n", opt->opt_max_swj_frequency);
 }
 
 static void display_target(int i, target *t, void *context)