ols: add test mode support

ols allows both external and internal test patterns at ~20khz
which are helpful for unit tests and demos.

pattern=internal -> route pattern internally to all 32 pins
                      (input otherwise disabled)

pattern=external -> generates pattern on unbuffered pins 16:31
                      (which can be looped back to the buffered pins 0:15)

Signed-off-by: Matt Ranostay <redacted>

diff --git a/hardware/openbench-logic-sniffer/api.c b/hardware/openbench-logic-sniffer/api.c
index 63c98821d7de00ad6a7b56b4d3c9420249d986f9..0000b42dd9e9983a8c1d98da4ef8ba7daf2e7c8a 100644 (file)
--- a/hardware/openbench-logic-sniffer/api.c
+++ b/hardware/openbench-logic-sniffer/api.c
@@ -32,9 +32,25 @@ static const int32_t hwcaps[] = {
        SR_CONF_TRIGGER_TYPE,
        SR_CONF_CAPTURE_RATIO,
        SR_CONF_LIMIT_SAMPLES,
+       SR_CONF_PATTERN_MODE,
        SR_CONF_RLE,
 };
 
+#define STR_PATTERN_EXTERNAL "external"
+#define STR_PATTERN_INTERNAL "internal"
+
+/* Supported methods of test pattern outputs */
+enum {
+       /**
+        * Capture pins 31:16 (unbuffered wing) output a test pattern
+        * that can captured on pins 0:15.
+        */
+       PATTERN_EXTERNAL,
+
+       /** Route test pattern internally to capture buffer. */
+       PATTERN_INTERNAL,
+};
+
 /* Probes are numbered 0-31 (on the PCB silkscreen). */
 SR_PRIV const char *ols_probe_names[NUM_PROBES + 1] = {
        "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
@@ -235,6 +251,12 @@ static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
        case SR_CONF_LIMIT_SAMPLES:
                *data = g_variant_new_uint64(devc->limit_samples);
                break;
+       case SR_CONF_PATTERN_MODE:
+               if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
+                       *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
+               else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
+                       *data = g_variant_new_string(STR_PATTERN_INTERNAL);
+               break;
        case SR_CONF_RLE:
                *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
                break;
@@ -250,6 +272,7 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
        struct dev_context *devc;
        int ret;
        uint64_t tmp_u64;
+       const char *stropt;
 
        if (sdi->status != SR_ST_ACTIVE)
                return SR_ERR_DEV_CLOSED;
@@ -278,6 +301,19 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
                } else
                        ret = SR_OK;
                break;
+       case SR_CONF_PATTERN_MODE:
+               stropt = g_variant_get_string(data, NULL);
+               ret = SR_OK;
+               if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
+                       sr_info("Enabling internal test mode.");
+                       devc->flag_reg |= FLAG_INTERNAL_TEST_MODE;
+               } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
+                       sr_info("Enabling external test mode.");
+                       devc->flag_reg |= FLAG_EXTERNAL_TEST_MODE;
+               } else {
+                       ret = SR_ERR;
+               }
+               break;
        case SR_CONF_RLE:
                if (g_variant_get_boolean(data)) {
                        sr_info("Enabling RLE.");

diff --git a/hardware/openbench-logic-sniffer/protocol.h b/hardware/openbench-logic-sniffer/protocol.h
index 3322409f06bd9c5a9ea6ac776c9adb929317fc8b..bf449e7003f7aef3f1f4ed747f7594b2b8381a18 100644 (file)
--- a/hardware/openbench-logic-sniffer/protocol.h
+++ b/hardware/openbench-logic-sniffer/protocol.h
@@ -46,6 +46,7 @@
 /* Command opcodes */
 #define CMD_RESET                  0x00
 #define CMD_RUN                    0x01
+#define CMD_TESTMODE               0x03
 #define CMD_ID                     0x02
 #define CMD_METADATA               0x04
 #define CMD_SET_FLAGS              0x82
@@ -74,6 +75,8 @@
 #define FLAG_CLOCK_EXTERNAL        0x40
 #define FLAG_CLOCK_INVERTED        0x80
 #define FLAG_RLE                   0x0100
+#define FLAG_EXTERNAL_TEST_MODE    0x0400
+#define FLAG_INTERNAL_TEST_MODE    0x0800
 
 /* Private, per-device-instance driver context. */
 struct dev_context {