]> sigrok.org Git - libsigrok.git/commitdiff
hameg-hmo: Minor cosmetics, coding-style fixes.
authorUwe Hermann <redacted>
Tue, 3 Dec 2013 15:48:21 +0000 (16:48 +0100)
committerUwe Hermann <redacted>
Tue, 3 Dec 2013 15:48:21 +0000 (16:48 +0100)
hardware/hameg-hmo/api.c
hardware/hameg-hmo/protocol.c

index 70d91a5a9ca19c45b08f495adf07f6648bd9742e..37e458afd42dc2a7503d3ee2a1983367ebabacd8 100644 (file)
@@ -19,7 +19,6 @@
 
 #include <stdlib.h>
 #include <glib/gstdio.h>
-
 #include "protocol.h"
 
 #define SERIALCOMM "115200/8n1/flow=1"
@@ -32,17 +31,11 @@ static const int32_t hwopts[] = {
 struct usb_id_info {
        uint16_t vendor_id;
        uint16_t product_id;
-} usb_id_info;
+};
 
 static struct usb_id_info ho_models[] = {
-       {
-               .vendor_id  = 0x0403,
-               .product_id = 0xed72, /* HO720 */
-       },
-       {
-               .vendor_id  = 0x0403,
-               .product_id = 0xed73, /* HO730 */
-       },
+       { 0x0403, 0xed72 }, /* HO720 */
+       { 0x0403, 0xed73 }, /* HO730 */
 };
 
 static int init(struct sr_context *sr_ctx)
@@ -53,27 +46,31 @@ static int init(struct sr_context *sr_ctx)
 /**
  * Find USB serial devices via the USB vendor ID and product ID.
  *
- * @param vendor_id vendor ID of the USB device.
- * @param product_id product ID of the USB device.
+ * @param vendor_id Vendor ID of the USB device.
+ * @param product_id Product ID of the USB device.
  *
- * @return A GSList of strings containing the path of the serial device or null
- * if no serial device is found. The returned list must be freed by the caller.
+ * @return A GSList of strings containing the path of the serial device or
+ *         NULL if no serial device is found. The returned list must be freed
+ *         by the caller.
  */
-static GSList *auto_find_usb(unsigned long vendor_id,
-                            unsigned long product_id)
+static GSList *auto_find_usb(uint16_t vendor_id, uint16_t product_id)
 {
 #ifdef __linux__
        const gchar *usb_dev;
        const char device_tree[] = "/sys/bus/usb/devices/";
-
-       GDir *devices_dir;
-
+       GDir *devices_dir, *device_dir;
        GSList *l = NULL;
-       GSList *tty_devices;
+       GSList *tty_devs;
        GSList *matched_paths;
+       FILE *fd;
+       char tmp[5];
+       gchar *vendor_path, *product_path, *path_copy;
+       gchar *prefix, *subdir_path, *device_path, *tty_path;
+       unsigned long read_vendor_id, read_product_id;
+       const char *file;
 
        l = NULL;
-       tty_devices = NULL;
+       tty_devs = NULL;
        matched_paths = NULL;
 
        if (!(devices_dir = g_dir_open(device_tree, 0, NULL)))
@@ -81,18 +78,9 @@ static GSList *auto_find_usb(unsigned long vendor_id,
 
        /*
         * Find potential candidates using the vendor ID and product ID
-        * and store them in matched_paths
+        * and store them in matched_paths.
         */
        while ((usb_dev = g_dir_read_name(devices_dir))) {
-               FILE *fd;
-               char tmp[5];
-
-               gchar *vendor_path;
-               gchar *product_path;
-
-               unsigned long read_vendor_id;
-               unsigned long read_product_id;
-
                vendor_path = g_strconcat(device_tree,
                                          usb_dev, "/idVendor", NULL);
                product_path = g_strconcat(device_tree,
@@ -126,29 +114,19 @@ static GSList *auto_find_usb(unsigned long vendor_id,
 
                if (vendor_id == read_vendor_id &&
                    product_id == read_product_id) {
-                       gchar *path_copy;
-
                        path_copy = g_strdup(usb_dev);
                        matched_paths = g_slist_prepend(matched_paths,
                                                        path_copy);
                }
 
-       skip_device:
+skip_device:
                g_free(vendor_path);
                g_free(product_path);
        }
        g_dir_close(devices_dir);
 
-       /* For every matched device try to find a ttyUSBX subfolder */
+       /* For every matched device try to find a ttyUSBX subfolder. */
        for (l = matched_paths; l; l = l->next) {
-               const char *file;
-
-               GDir *device_dir;
-
-               gchar *prefix;
-               gchar *subdir_path;
-               gchar *device_path;
-
                subdir_path = NULL;
 
                device_path = g_strconcat(device_tree, l->data, NULL);
@@ -163,8 +141,7 @@ static GSList *auto_find_usb(unsigned long vendor_id,
                while ((file = g_dir_read_name(device_dir))) {
                        if (g_str_has_prefix(file, prefix)) {
                                subdir_path = g_strconcat(device_path,
-                                                         "/", file,
-                                                         NULL);
+                                               "/", file, NULL);
                                break;
                        }
                }
@@ -182,14 +159,12 @@ static GSList *auto_find_usb(unsigned long vendor_id,
 
                        while ((file = g_dir_read_name(device_dir))) {
                                if (g_str_has_prefix(file, "ttyUSB")) {
-                                       gchar *tty_path;
-
                                        tty_path = g_strconcat("/dev/",
                                                               file, NULL);
-                                       sr_dbg("Found USB device %04x:%04x attached to %s",
+                                       sr_dbg("Found USB device %04x:%04x attached to %s.",
                                               vendor_id, product_id, tty_path);
-                                       tty_devices = g_slist_prepend(tty_devices,
-                                                                     tty_path);
+                                       tty_devs = g_slist_prepend(tty_devs,
+                                                       tty_path);
                                        break;
                                }
                        }
@@ -198,7 +173,7 @@ static GSList *auto_find_usb(unsigned long vendor_id,
        }
        g_slist_free_full(matched_paths, g_free);
 
-       return tty_devices;
+       return tty_devs;
 #else
        return NULL;
 #endif
@@ -207,16 +182,14 @@ static GSList *auto_find_usb(unsigned long vendor_id,
 static GSList *scan(GSList *options)
 {
        GSList *devices;
-
        struct drv_context *drvc;
        struct sr_dev_inst *sdi;
-
-       const char *serial_device;
-       const char *serial_options;
+       const char *serial_device, *serial_options;
+       GSList *l, *tty_devs;
+       unsigned int i;
 
        serial_device = NULL;
        serial_options = SERIALCOMM;
-
        sdi = NULL;
        devices = NULL;
        drvc = di->priv;
@@ -225,29 +198,21 @@ static GSList *scan(GSList *options)
        if (sr_serial_extract_options(options, &serial_device,
                                      &serial_options) == SR_OK) {
                sdi = hameg_probe_serial_device(serial_device, serial_options);
-
                if (sdi != NULL) {
                        devices = g_slist_append(devices, sdi);
                        drvc->instances = g_slist_append(drvc->instances, sdi);
                }
-
        } else {
-               GSList *l;
-               GSList *tty_devices;
-
-               unsigned int i;
-
-               tty_devices = NULL;
+               tty_devs = NULL;
 
                for (i = 0; i < ARRAY_SIZE(ho_models); i++) {
                        if ((l = auto_find_usb(ho_models[i].vendor_id,
                                           ho_models[i].product_id)) == NULL)
                                continue;
-
-                       tty_devices = g_slist_concat(tty_devices, l);
+                       tty_devs = g_slist_concat(tty_devs, l);
                }
 
-               for (l = tty_devices; l; l = l->next) {
+               for (l = tty_devs; l; l = l->next) {
                        sdi = hameg_probe_serial_device(l->data, serial_options);
                        if (sdi != NULL) {
                                devices = g_slist_append(devices, sdi);
@@ -255,7 +220,7 @@ static GSList *scan(GSList *options)
                        }
                }
 
-               g_slist_free_full(tty_devices, g_free);
+               g_slist_free_full(tty_devs, g_free);
        }
 
        return devices;
@@ -269,7 +234,6 @@ static GSList *dev_list(void)
 static void clear_helper(void *priv)
 {
        unsigned int i;
-
        struct dev_context *devc;
        struct scope_config *model;
 
@@ -278,9 +242,8 @@ static void clear_helper(void *priv)
 
        scope_state_free(devc->model_state);
 
-       for (i = 0; i < model->analog_channels; ++i) {
+       for (i = 0; i < model->analog_channels; ++i)
                g_slist_free(devc->analog_groups[i].probes);
-       }
 
        for (i = 0; i < model->digital_pods; ++i) {
                g_slist_free(devc->digital_groups[i].probes);
@@ -351,16 +314,15 @@ static int check_probe_group(struct dev_context *devc,
                        return PG_DIGITAL;
 
        sr_err("Invalid probe group specified.");
+
        return PG_INVALID;
 }
 
 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
                      const struct sr_probe_group *probe_group)
 {
-       int ret;
-       int pg_type;
+       int ret, pg_type;
        unsigned int i;
-
        struct dev_context *devc;
        struct scope_config *model;
 
@@ -378,12 +340,10 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
                *data = g_variant_new_int32(model->num_xdivs);
                ret = SR_OK;
                break;
-
        case SR_CONF_NUM_VDIV:
                if (pg_type == PG_NONE) {
                        sr_err("No probe group specified.");
                        return SR_ERR_PROBE_GROUP;
-
                } else if (pg_type == PG_ANALOG) {
                        for (i = 0; i < model->analog_channels; ++i) {
                                if (probe_group == &devc->analog_groups[i]) {
@@ -397,7 +357,6 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
                        ret = SR_ERR_NA;
                }
                break;
-
        default:
                ret = SR_ERR_NA;
        }
@@ -408,7 +367,6 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 {
        unsigned int i;
-
        GVariant *rational[2];
        GVariantBuilder gvb;
 
@@ -418,7 +376,7 @@ static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
                rational[0] = g_variant_new_uint64((*array)[i][0]);
                rational[1] = g_variant_new_uint64((*array)[i][1]);
 
-               /* FIXME valgrind reports a memory leak here */
+               /* FIXME: Valgrind reports a memory leak here. */
                g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
        }
 
@@ -428,14 +386,15 @@ static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
                      const struct sr_probe_group *probe_group)
 {
-       int ret;
-       int pg_type;
-       unsigned int i;
+       int ret, pg_type;
+       unsigned int i, j;
        char command[MAX_COMMAND_SIZE];
-
        struct dev_context *devc;
        struct scope_config *model;
        struct scope_state *state;
+       const char *tmp;
+       uint64_t p, q, tmp_u64;
+       double tmp_d;
 
        if (!sdi || !(devc = sdi->priv))
                return SR_ERR_ARG;
@@ -453,17 +412,11 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
                devc->frame_limit = g_variant_get_uint64(data);
                ret = SR_OK;
                break;
-
        case SR_CONF_TRIGGER_SOURCE:
-       {
-               const char *tmp;
-
                tmp = g_variant_get_string(data, NULL);
-
                for (i = 0; (*model->trigger_sources)[i]; i++) {
                        if (!g_strcmp0(tmp, (*model->trigger_sources)[i])) {
                                state->trigger_source = i;
-
                                g_snprintf(command, sizeof(command),
                                           (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
                                           (*model->trigger_sources)[i]);
@@ -472,14 +425,8 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
                                break;
                        }
                }
-       }
-       break;
-
+               break;
        case SR_CONF_VDIV:
-       {
-               unsigned int j;
-               uint64_t p, q;
-
                if (pg_type == PG_NONE) {
                        sr_err("No probe group specified.");
                        return SR_ERR_PROBE_GROUP;
@@ -489,10 +436,10 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 
                for (i = 0; i < model->num_vdivs; i++) {
                        if (p == (*model->vdivs)[i][0] &&
-                           q == (*model->vdivs)[i][1]){
+                           q == (*model->vdivs)[i][1]) {
                                for (j = 1; j <= model->analog_channels; ++j) {
                                        if (probe_group == &devc->analog_groups[j - 1]) {
-                                               state->analog_channels[j-1].vdiv = (float) p / q;
+                                               state->analog_channels[j - 1].vdiv = (float) p / q;
                                                g_snprintf(command, sizeof(command),
                                                           (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
                                                           j, state->analog_channels[j-1].vdiv);
@@ -509,18 +456,13 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
                                break;
                        }
                }
-       }
-       break;
-
+               break;
        case SR_CONF_TIMEBASE:
-       {
-               uint64_t p, q;
-
                g_variant_get(data, "(tt)", &p, &q);
 
                for (i = 0; i < model->num_timebases; i++) {
                        if (p == (*model->timebases)[i][0] &&
-                           q == (*model->timebases)[i][1]){
+                           q == (*model->timebases)[i][1]) {
                                state->timebase = (float) p / q;
                                g_snprintf(command, sizeof(command),
                                           (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
@@ -530,51 +472,35 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
                                break;
                        }
                }
-       }
-       break;
-
+               break;
        case SR_CONF_HORIZ_TRIGGERPOS:
-       {
-               double tmp;
-
-               tmp = g_variant_get_double(data);
+               tmp_d = g_variant_get_double(data);
 
-               if (tmp < 0.0 || tmp > 1.0)
+               if (tmp_d < 0.0 || tmp_d > 1.0)
                        return SR_ERR;
 
-               state->horiz_triggerpos = -(tmp - 0.5) * state->timebase * model->num_xdivs;
+               state->horiz_triggerpos = -(tmp_d - 0.5) * state->timebase * model->num_xdivs;
                g_snprintf(command, sizeof(command),
                           (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
                           state->horiz_triggerpos);
 
                ret = sr_scpi_send(sdi->conn, command);
-       }
-       break;
-
+               break;
        case SR_CONF_TRIGGER_SLOPE:
-       {
-               uint64_t tmp;
+               tmp_u64 = g_variant_get_uint64(data);
 
-               tmp = g_variant_get_uint64(data);
-
-               if (tmp != 0 && tmp != 1)
+               if (tmp_u64 != 0 && tmp_u64 != 1)
                        return SR_ERR;
 
-               state->trigger_slope = tmp;
+               state->trigger_slope = tmp_u64;
 
                g_snprintf(command, sizeof(command),
                           (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
-                          tmp ? "POS" : "NEG");
+                          tmp_u64 ? "POS" : "NEG");
 
                ret = sr_scpi_send(sdi->conn, command);
-       }
-       break;
-
+               break;
        case SR_CONF_COUPLING:
-       {
-               unsigned int j;
-               const char *tmp;
-
                if (pg_type == PG_NONE) {
                        sr_err("No probe group specified.");
                        return SR_ERR_PROBE_GROUP;
@@ -603,9 +529,7 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
                                break;
                        }
                }
-       }
-       break;
-
+               break;
        default:
                ret = SR_ERR_NA;
                break;
@@ -618,10 +542,9 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 }
 
 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
-                     const struct sr_probe_group *probe_group)
+                      const struct sr_probe_group *probe_group)
 {
        int pg_type;
-
        struct dev_context *devc;
        struct scope_config *model;
 
@@ -637,44 +560,35 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
        case SR_CONF_DEVICE_OPTIONS:
                if (pg_type == PG_NONE) {
                        *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
-                                                         model->hw_caps,
-                                                         model->num_hwcaps,
-                                                         sizeof(int32_t));
+                               model->hw_caps, model->num_hwcaps,
+                               sizeof(int32_t));
                } else if (pg_type == PG_ANALOG) {
                        *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
-                                                         model->analog_hwcaps,
-                                                         model->num_analog_hwcaps,
-                                                         sizeof(int32_t));
+                               model->analog_hwcaps, model->num_analog_hwcaps,
+                               sizeof(int32_t));
                } else {
                        *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
-                                                         NULL, 0, sizeof(int32_t));
+                               NULL, 0, sizeof(int32_t));
                }
                break;
-
        case SR_CONF_COUPLING:
                if (pg_type == PG_NONE)
                        return SR_ERR_PROBE_GROUP;
-
                *data = g_variant_new_strv(*model->coupling_options,
-                                          g_strv_length((char **) *model->coupling_options));
+                          g_strv_length((char **)*model->coupling_options));
                break;
-
        case SR_CONF_TRIGGER_SOURCE:
                *data = g_variant_new_strv(*model->trigger_sources,
-                                          g_strv_length((char **) *model->trigger_sources));
+                          g_strv_length((char **)*model->trigger_sources));
                break;
-
        case SR_CONF_TIMEBASE:
                *data = build_tuples(model->timebases, model->num_timebases);
                break;
-
        case SR_CONF_VDIV:
                if (pg_type == PG_NONE)
                        return SR_ERR_PROBE_GROUP;
-
                *data = build_tuples(model->vdivs, model->num_vdivs);
                break;
-
        default:
                return SR_ERR_NA;
        }
@@ -685,7 +599,6 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 {
        char command[MAX_COMMAND_SIZE];
-
        struct sr_probe *probe;
        struct dev_context *devc;
        struct scope_config *model;
@@ -707,7 +620,7 @@ SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
                           probe->index < 8 ? 1 : 2);
                break;
        default:
-               sr_err("Invalid probe type");
+               sr_err("Invalid probe type.");
                break;
        }
 
@@ -717,21 +630,13 @@ SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 static int hmo_check_probes(GSList *probes)
 {
        GSList *l;
-       gboolean enabled_pod1;
-       gboolean enabled_pod2;
-       gboolean enabled_chan3;
-       gboolean enabled_chan4;
-
        struct sr_probe *probe;
+       gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
 
-       enabled_pod1 = FALSE;
-       enabled_pod2 = FALSE;
-       enabled_chan3 = FALSE;
-       enabled_chan4 = FALSE;
+       enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
 
        for (l = probes; l; l = l->next) {
                probe = l->data;
-
                switch (probe->type) {
                case SR_PROBE_ANALOG:
                        if (probe->index == 2)
@@ -739,14 +644,12 @@ static int hmo_check_probes(GSList *probes)
                        else if (probe->index == 3)
                                enabled_chan4 = TRUE;
                        break;
-
                case SR_PROBE_LOGIC:
                        if (probe->index < 8)
                                enabled_pod1 = TRUE;
                        else
                                enabled_pod2 = TRUE;
                        break;
-
                default:
                        return SR_ERR;
                }
@@ -765,10 +668,8 @@ static int hmo_setup_probes(const struct sr_dev_inst *sdi)
        unsigned int i;
        gboolean *pod_enabled;
        char command[MAX_COMMAND_SIZE];
-
        struct scope_state *state;
        struct scope_config *model;
-
        struct sr_probe *probe;
        struct dev_context *devc;
        struct sr_serial_dev_inst *serial;
@@ -782,10 +683,8 @@ static int hmo_setup_probes(const struct sr_dev_inst *sdi)
 
        for (l = sdi->probes; l; l = l->next) {
                probe = l->data;
-
                switch (probe->type) {
                case SR_PROBE_ANALOG:
-               {
                        if (probe->enabled != state->analog_channels[probe->index].state) {
                                g_snprintf(command, sizeof(command),
                                           (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
@@ -795,11 +694,8 @@ static int hmo_setup_probes(const struct sr_dev_inst *sdi)
                                        return SR_ERR;
                                state->analog_channels[probe->index].state = probe->enabled;
                        }
-               }
-               break;
-
+                       break;
                case SR_PROBE_LOGIC:
-               {
                        /*
                         * A digital POD needs to be enabled for every group of
                         * 8 probes.
@@ -817,24 +713,22 @@ static int hmo_setup_probes(const struct sr_dev_inst *sdi)
 
                                state->digital_channels[probe->index] = probe->enabled;
                        }
-               }
-               break;
-
+                       break;
                default:
                        return SR_ERR;
                }
        }
 
        for (i = 1; i <= model->digital_pods; ++i) {
-               if (state->digital_pods[i-1] != pod_enabled[i-1]) {
+               if (state->digital_pods[i - 1] != pod_enabled[i - 1]) {
                        g_snprintf(command, sizeof(command),
                                   (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
-                                  i, pod_enabled[i-1]);
+                                  i, pod_enabled[i - 1]);
 
                        if (sr_scpi_send(serial, command) != SR_OK)
                                return SR_ERR;
 
-                       state->digital_pods[i-1] = pod_enabled[i-1];
+                       state->digital_pods[i - 1] = pod_enabled[i - 1];
                }
        }
 
@@ -847,7 +741,6 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 {
        GSList *l;
        gboolean digital_added;
-
        struct sr_probe *probe;
        struct dev_context *devc;
        struct sr_serial_dev_inst *serial;
@@ -861,12 +754,11 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 
        for (l = sdi->probes; l; l = l->next) {
                probe = l->data;
-
                if (probe->enabled) {
-                       /* Only add a single digital probe */
-                       if (probe->type != SR_PROBE_LOGIC  || !digital_added) {
-                               devc->enabled_probes = g_slist_append(devc->enabled_probes,
-                                                                     probe);
+                       /* Only add a single digital probe. */
+                       if (probe->type != SR_PROBE_LOGIC || !digital_added) {
+                               devc->enabled_probes = g_slist_append(
+                                               devc->enabled_probes, probe);
                                if (probe->type == SR_PROBE_LOGIC)
                                        digital_added = TRUE;
                        }
@@ -918,7 +810,7 @@ static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 
 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
        .name = "hameg-hmo",
-       .longname = "Hameg HMO scope driver",
+       .longname = "Hameg HMO",
        .api_version = 1,
        .init = init,
        .cleanup = cleanup,
index cd94f0ca1bb9393fec76f0065bf0805a9c914cd6..68ab39cb69ced984ecf0f8f23dbee32b14fe3d5f 100644 (file)
@@ -261,7 +261,7 @@ static int check_manufacturer(const char *manufacturer)
        unsigned int i;
 
        for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
-               if (strcmp(manufacturer, manufacturers[i]) == 0)
+               if (!strcmp(manufacturer, manufacturers[i]))
                        return SR_OK;
 
        return SR_ERR;
@@ -273,7 +273,7 @@ static void scope_state_dump(struct scope_config *config,
        unsigned int i;
 
        for (i = 0; i < config->analog_channels; ++i) {
-               sr_info("State of analog channel %d -> %s : %s %.3eV %.3e offset", i+1,
+               sr_info("State of analog channel %d -> %s : %s %.3eV %.3e offset", i + 1,
                        state->analog_channels[i].state ? "On" : "Off",
                        (*config->coupling_options)[state->analog_channels[i].coupling],
                        state->analog_channels[i].vdiv, state->analog_channels[i].vertical_offset);
@@ -297,15 +297,13 @@ static void scope_state_dump(struct scope_config *config,
 }
 
 static int scope_state_get_array_option(struct sr_serial_dev_inst *serial,
-                                       const char *command, const char *(*array)[],
-                                       int *result)
+               const char *command, const char *(*array)[], int *result)
 {
        char *tmp;
        unsigned int i;
 
        if (sr_scpi_get_string(serial, command, &tmp) != SR_OK) {
-               if (tmp)
-                       g_free(tmp);
+               g_free(tmp);
                return SR_ERR;
        }
 
@@ -416,21 +414,25 @@ SR_PRIV int scope_state_get(struct sr_dev_inst *sdi)
        if (digital_channel_state_get(sdi->conn, config, state) != SR_OK)
                return SR_ERR;
 
-       /* TODO check if value is sensible */
-       if (sr_scpi_get_float(sdi->conn, (*config->scpi_dialect)[SCPI_CMD_GET_TIMEBASE],
-                             &state->timebase) != SR_OK)
+       /* TODO: Check if value is sensible. */
+       if (sr_scpi_get_float(sdi->conn,
+                       (*config->scpi_dialect)[SCPI_CMD_GET_TIMEBASE],
+                       &state->timebase) != SR_OK)
                return SR_ERR;
 
-       if (sr_scpi_get_float(sdi->conn, (*config->scpi_dialect)[SCPI_CMD_GET_HORIZ_TRIGGERPOS],
-                             &state->horiz_triggerpos) != SR_OK)
+       if (sr_scpi_get_float(sdi->conn,
+                       (*config->scpi_dialect)[SCPI_CMD_GET_HORIZ_TRIGGERPOS],
+                       &state->horiz_triggerpos) != SR_OK)
                return SR_ERR;
 
-       if (scope_state_get_array_option(sdi->conn, (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_SOURCE],
-                                config->trigger_sources, &state->trigger_source) != SR_OK)
+       if (scope_state_get_array_option(sdi->conn,
+                       (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_SOURCE],
+                       config->trigger_sources, &state->trigger_source) != SR_OK)
                return SR_ERR;
 
-       if (scope_state_get_array_option(sdi->conn, (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_SLOPE],
-                                config->trigger_slopes, &state->trigger_slope) != SR_OK)
+       if (scope_state_get_array_option(sdi->conn,
+               (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_SLOPE],
+               config->trigger_slopes, &state->trigger_slope) != SR_OK)
                return SR_ERR;
 
        scope_state_dump(config, state);
@@ -446,15 +448,15 @@ SR_PRIV struct scope_state *scope_state_new(struct scope_config *config)
                return NULL;
 
        if (!(state->analog_channels = g_try_malloc0_n(config->analog_channels,
-                                                           sizeof(struct analog_channel_state))))
+                                   sizeof(struct analog_channel_state))))
            goto fail;
 
-       if (!(state->digital_channels = g_try_malloc0_n(config->digital_channels,
-                                                            sizeof(gboolean))))
+       if (!(state->digital_channels = g_try_malloc0_n(
+                       config->digital_channels, sizeof(gboolean))))
            goto fail;
 
        if (!(state->digital_pods = g_try_malloc0_n(config->digital_pods,
-                                                            sizeof(gboolean))))
+                                                    sizeof(gboolean))))
            goto fail;
 
        return state;
@@ -483,16 +485,14 @@ SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi)
 {
        char tmp[25];
        int model_index;
-       unsigned int i;
-       unsigned int j;
-
+       unsigned int i, j;
        struct sr_probe *probe;
        struct dev_context *devc;
 
        devc = sdi->priv;
        model_index = -1;
 
-       /* Find the exact model */
+       /* Find the exact model. */
        for (i = 0; i < ARRAY_SIZE(scope_models); i++) {
                for (j = 0; scope_models[i].name[j]; j++) {
                        if (!strcmp(sdi->model, scope_models[i].name[j])) {
@@ -505,7 +505,7 @@ SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi)
        }
 
        if (model_index == -1) {
-               sr_dbg("Unsupported HMO device");
+               sr_dbg("Unsupported HMO device.");
                return SR_ERR_NA;
        }
 
@@ -517,37 +517,38 @@ SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi)
                                                   scope_models[model_index].digital_pods)))
                        return SR_ERR_MALLOC;
 
-       /* Add analog channels */
+       /* Add analog channels. */
        for (i = 0; i < scope_models[model_index].analog_channels; i++) {
                if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
-                                          (*scope_models[model_index].analog_names)[i])))
+                          (*scope_models[model_index].analog_names)[i])))
                        return SR_ERR_MALLOC;
                sdi->probes = g_slist_append(sdi->probes, probe);
 
-               devc->analog_groups[i].name = (char *) (*scope_models[model_index].analog_names)[i];
+               devc->analog_groups[i].name =
+                       (char *)(*scope_models[model_index].analog_names)[i];
                devc->analog_groups[i].probes = g_slist_append(NULL, probe);
 
                sdi->probe_groups = g_slist_append(sdi->probe_groups,
                                                   &devc->analog_groups[i]);
        }
 
-       /* Add digital probe groups */
+       /* Add digital probe groups. */
        for (i = 0; i < scope_models[model_index].digital_pods; ++i) {
                g_snprintf(tmp, 25, "POD%d", i);
                devc->digital_groups[i].name = g_strdup(tmp);
                sdi->probe_groups = g_slist_append(sdi->probe_groups,
-                                                  &devc->digital_groups[i < 8 ? 0 : 1]);
+                                  &devc->digital_groups[i < 8 ? 0 : 1]);
        }
 
-       /* Add digital channels */
+       /* Add digital channels. */
        for (i = 0; i < scope_models[model_index].digital_channels; i++) {
                if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
-                                          (*scope_models[model_index].digital_names)[i])))
+                          (*scope_models[model_index].digital_names)[i])))
                        return SR_ERR_MALLOC;
                sdi->probes = g_slist_append(sdi->probes, probe);
 
-               devc->digital_groups[i < 8 ? 0 : 1].probes = g_slist_append(devc->digital_groups[i < 8 ? 0 : 1].probes,
-                                                                           probe);
+               devc->digital_groups[i < 8 ? 0 : 1].probes = g_slist_append(
+                       devc->digital_groups[i < 8 ? 0 : 1].probes, probe);
        }
 
        devc->model_config = &scope_models[model_index];
@@ -580,7 +581,7 @@ SR_PRIV struct sr_dev_inst *hameg_probe_serial_device(const char *serial_device,
                goto fail;
 
        if (sr_scpi_get_hw_id(serial, &hw_info) != SR_OK) {
-               sr_info("Couldn't get IDN response");
+               sr_info("Couldn't get IDN response.");
                goto fail;
        }
 
@@ -627,6 +628,9 @@ SR_PRIV int hameg_hmo_receive_data(int fd, int revents, void *cb_data)
        struct sr_dev_inst *sdi;
        struct dev_context *devc;
        struct sr_datafeed_packet packet;
+       GArray *data;
+       struct sr_datafeed_analog analog;
+       struct sr_datafeed_logic logic;
 
        (void)fd;
 
@@ -641,10 +645,6 @@ SR_PRIV int hameg_hmo_receive_data(int fd, int revents, void *cb_data)
 
                switch (probe->type) {
                case SR_PROBE_ANALOG:
-               {
-                       GArray *data;
-                       struct sr_datafeed_analog analog;
-
                        if (sr_scpi_get_floatv(sdi->conn, NULL, &data) != SR_OK) {
                                if (data)
                                        g_array_free(data, TRUE);
@@ -666,14 +666,8 @@ SR_PRIV int hameg_hmo_receive_data(int fd, int revents, void *cb_data)
                        sr_session_send(cb_data, &packet);
                        g_slist_free(analog.probes);
                        g_array_free(data, TRUE);
-               }
-               break;
-
+                       break;
                case SR_PROBE_LOGIC:
-               {
-                       GArray *data;
-                       struct sr_datafeed_logic logic;
-
                        if (sr_scpi_get_uint8v(sdi->conn, NULL, &data) != SR_OK) {
                                if (data)
                                        g_free(data);
@@ -690,11 +684,9 @@ SR_PRIV int hameg_hmo_receive_data(int fd, int revents, void *cb_data)
                        packet.payload = &logic;
                        sr_session_send(cb_data, &packet);
                        g_array_free(data, TRUE);
-               }
-               break;
-
+                       break;
                default:
-                       sr_err("Invalid probe type");
+                       sr_err("Invalid probe type.");
                        break;
                }