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debian/rules: install the NEWS file as the upstream changelog
[libam7xxx.git] / src / am7xxx.c
diff --git a/src/am7xxx.c b/src/am7xxx.c
index e809c55..ebc403e 100644 (file)
--- a/src/am7xxx.c
+++ b/src/am7xxx.c
@@ -1,6 +1,6 @@
 /* am7xxx - communication with AM7xxx based USB Pico Projectors and DPFs
  *
 /* am7xxx - communication with AM7xxx based USB Pico Projectors and DPFs
  *
- * Copyright (C) 2012  Antonio Ospite <ospite@studenti.unina.it>
+ * Copyright (C) 2012-2014  Antonio Ospite <ao2@ao2.it>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -26,6 +26,7 @@
 
 #include "am7xxx.h"
 #include "serialize.h"
 
 #include "am7xxx.h"
 #include "serialize.h"
+#include "tools.h"
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
@@ -64,37 +65,80 @@ static void log_message(am7xxx_context *ctx,
 #define debug(ctx, ...)   log_message(ctx,  AM7XXX_LOG_DEBUG,   __func__, 0,        __VA_ARGS__)
 #define trace(ctx, ...)   log_message(ctx,  AM7XXX_LOG_TRACE,   NULL,     0,        __VA_ARGS__)
 
 #define debug(ctx, ...)   log_message(ctx,  AM7XXX_LOG_DEBUG,   __func__, 0,        __VA_ARGS__)
 #define trace(ctx, ...)   log_message(ctx,  AM7XXX_LOG_TRACE,   NULL,     0,        __VA_ARGS__)
 
+struct am7xxx_ops {
+       int (*set_power_mode)(am7xxx_device *dev, am7xxx_power_mode power);
+       int (*set_zoom_mode)(am7xxx_device *dev, am7xxx_zoom_mode zoom);
+};
+
 struct am7xxx_usb_device_descriptor {
        const char *name;
        uint16_t vendor_id;
        uint16_t product_id;
 struct am7xxx_usb_device_descriptor {
        const char *name;
        uint16_t vendor_id;
        uint16_t product_id;
+       uint8_t configuration;    /* The bConfigurationValue of the device */
+       uint8_t interface_number; /* The bInterfaceNumber of the device */
+       struct am7xxx_ops ops;
 };
 
 };
 
-static struct am7xxx_usb_device_descriptor supported_devices[] = {
+static int default_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power);
+static int picopix_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power);
+static int default_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom);
+static int picopix_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom);
+
+#define DEFAULT_OPS { \
+       .set_power_mode = default_set_power_mode, \
+       .set_zoom_mode = default_set_zoom_mode, \
+}
+
+static const struct am7xxx_usb_device_descriptor supported_devices[] = {
        {
                .name       = "Acer C110",
                .vendor_id  = 0x1de1,
                .product_id = 0xc101,
        {
                .name       = "Acer C110",
                .vendor_id  = 0x1de1,
                .product_id = 0xc101,
+               .configuration    = 2,
+               .interface_number = 0,
+               .ops = DEFAULT_OPS,
        },
        {
                .name       = "Acer C112",
                .vendor_id  = 0x1de1,
                .product_id = 0x5501,
        },
        {
                .name       = "Acer C112",
                .vendor_id  = 0x1de1,
                .product_id = 0x5501,
+               .configuration    = 2,
+               .interface_number = 0,
+               .ops = DEFAULT_OPS,
        },
        {
                .name       ="Aiptek PocketCinema T25",
                .vendor_id  = 0x08ca,
                .product_id = 0x2144,
        },
        {
                .name       ="Aiptek PocketCinema T25",
                .vendor_id  = 0x08ca,
                .product_id = 0x2144,
+               .configuration    = 2,
+               .interface_number = 0,
+               .ops = DEFAULT_OPS,
        },
        {
                .name       = "Philips/Sagemcom PicoPix 1020",
                .vendor_id  = 0x21e7,
                .product_id = 0x000e,
        },
        {
                .name       = "Philips/Sagemcom PicoPix 1020",
                .vendor_id  = 0x21e7,
                .product_id = 0x000e,
+               .configuration    = 2,
+               .interface_number = 0,
+               .ops = DEFAULT_OPS,
        },
        {
                .name       = "Philips/Sagemcom PicoPix 2055",
                .vendor_id  = 0x21e7,
                .product_id = 0x0016,
        },
        {
                .name       = "Philips/Sagemcom PicoPix 2055",
                .vendor_id  = 0x21e7,
                .product_id = 0x0016,
+               .configuration    = 2,
+               .interface_number = 0,
+               .ops = {
+                       .set_power_mode = picopix_set_power_mode,
+                       .set_zoom_mode = picopix_set_zoom_mode,
+               },
+       },
+       {
+               .name       = "Philips/Sagemcom PicoPix 2330",
+               .vendor_id  = 0x21e7,
+               .product_id = 0x0019,
+               .configuration    = 1,
+               .interface_number = 0,
        },
 };
 
        },
 };
 
@@ -106,6 +150,8 @@ static struct am7xxx_usb_device_descriptor supported_devices[] = {
 
 struct _am7xxx_device {
        libusb_device_handle *usb_device;
 
 struct _am7xxx_device {
        libusb_device_handle *usb_device;
+       struct libusb_transfer *transfer;
+       int transfer_completed;
        uint8_t buffer[AM7XXX_HEADER_WIRE_SIZE];
        am7xxx_device_info *device_info;
        am7xxx_context *ctx;
        uint8_t buffer[AM7XXX_HEADER_WIRE_SIZE];
        am7xxx_device_info *device_info;
        am7xxx_context *ctx;
@@ -124,6 +170,11 @@ typedef enum {
        AM7XXX_PACKET_TYPE_IMAGE   = 0x02,
        AM7XXX_PACKET_TYPE_POWER   = 0x04,
        AM7XXX_PACKET_TYPE_ZOOM    = 0x05,
        AM7XXX_PACKET_TYPE_IMAGE   = 0x02,
        AM7XXX_PACKET_TYPE_POWER   = 0x04,
        AM7XXX_PACKET_TYPE_ZOOM    = 0x05,
+       AM7XXX_PACKET_TYPE_PICOPIX_POWER_LOW    = 0x15,
+       AM7XXX_PACKET_TYPE_PICOPIX_POWER_MEDIUM = 0x16,
+       AM7XXX_PACKET_TYPE_PICOPIX_POWER_HIGH   = 0x17,
+       AM7XXX_PACKET_TYPE_PICOPIX_ENABLE_TI    = 0x18,
+       AM7XXX_PACKET_TYPE_PICOPIX_DISABLE_TI   = 0x19,
 } am7xxx_packet_type;
 
 struct am7xxx_generic_header {
 } am7xxx_packet_type;
 
 struct am7xxx_generic_header {
@@ -189,6 +240,18 @@ struct am7xxx_header {
 
 
 #ifdef DEBUG
 
 
 #ifdef DEBUG
+static void debug_dump_generic_header(am7xxx_context *ctx, struct am7xxx_generic_header *g)
+{
+       if (ctx == NULL || g == NULL)
+               return;
+
+       debug(ctx, "Generic header:\n");
+       debug(ctx, "\tfield0:  0x%08x (%u)\n", g->field0, g->field0);
+       debug(ctx, "\tfield1:  0x%08x (%u)\n", g->field1, g->field1);
+       debug(ctx, "\tfield2:  0x%08x (%u)\n", g->field2, g->field2);
+       debug(ctx, "\tfield3:  0x%08x (%u)\n", g->field3, g->field3);
+}
+
 static void debug_dump_devinfo_header(am7xxx_context *ctx, struct am7xxx_devinfo_header *d)
 {
        if (ctx == NULL || d == NULL)
 static void debug_dump_devinfo_header(am7xxx_context *ctx, struct am7xxx_devinfo_header *d)
 {
        if (ctx == NULL || d == NULL)
@@ -267,7 +330,8 @@ static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h)
                break;
 
        default:
                break;
 
        default:
-               debug(ctx, "Packet type not supported!\n");
+               debug(ctx, "Parsing data not supported for this packet type!\n");
+               debug_dump_generic_header(ctx, &(h->header_data.data));
                break;
        }
        debug(ctx, "END\n\n");
                break;
        }
        debug(ctx, "END\n\n");
@@ -348,6 +412,117 @@ static int send_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
        return 0;
 }
 
        return 0;
 }
 
+static void send_data_async_complete_cb(struct libusb_transfer *transfer)
+{
+       am7xxx_device *dev = (am7xxx_device *)(transfer->user_data);
+       int *completed = &(dev->transfer_completed);
+       int transferred = transfer->actual_length;
+       int ret;
+
+       if (transferred != transfer->length) {
+               error(dev->ctx, "transferred: %d (expected %u)\n",
+                     transferred, transfer->length);
+       }
+
+       switch (transfer->status) {
+       case LIBUSB_TRANSFER_COMPLETED:
+               ret = 0;
+               break;
+       case LIBUSB_TRANSFER_TIMED_OUT:
+               ret = LIBUSB_ERROR_TIMEOUT;
+               break;
+       case LIBUSB_TRANSFER_STALL:
+               ret = LIBUSB_ERROR_PIPE;
+               break;
+       case LIBUSB_TRANSFER_OVERFLOW:
+               ret = LIBUSB_ERROR_OVERFLOW;
+               break;
+       case LIBUSB_TRANSFER_NO_DEVICE:
+               ret = LIBUSB_ERROR_NO_DEVICE;
+               break;
+       case LIBUSB_TRANSFER_ERROR:
+       case LIBUSB_TRANSFER_CANCELLED:
+               ret = LIBUSB_ERROR_IO;
+               break;
+       default:
+               error(dev->ctx, "unrecognised status code %d", transfer->status);
+               ret = LIBUSB_ERROR_OTHER;
+       }
+
+       if (ret < 0)
+               error(dev->ctx, "libusb transfer failed: %s",
+                     libusb_error_name(ret));
+
+       libusb_free_transfer(transfer);
+       transfer = NULL;
+
+       *completed = 1;
+}
+
+static inline void wait_for_trasfer_completed(am7xxx_device *dev)
+{
+       while (!dev->transfer_completed) {
+               int ret = libusb_handle_events_completed(dev->ctx->usb_context,
+                                                        &(dev->transfer_completed));
+               if (ret < 0) {
+                       if (ret == LIBUSB_ERROR_INTERRUPTED)
+                               continue;
+                       error(dev->ctx, "libusb_handle_events failed: %s, cancelling transfer and retrying",
+                             libusb_error_name(ret));
+                       libusb_cancel_transfer(dev->transfer);
+                       continue;
+               }
+       }
+}
+
+static int send_data_async(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
+{
+       int ret;
+       uint8_t *transfer_buffer;
+
+       dev->transfer = libusb_alloc_transfer(0);
+       if (dev->transfer == NULL) {
+               error(dev->ctx, "cannot allocate transfer (%s)\n",
+                     strerror(errno));
+               return -ENOMEM;
+       }
+
+       /* Make a copy of the buffer so the caller can safely reuse it just
+        * after libusb_submit_transfer() has returned. This technique
+        * requires more allocations than a proper double-buffering approach
+        * but it takes a lot less code. */
+       transfer_buffer = malloc(len);
+       if (transfer_buffer == NULL) {
+               error(dev->ctx, "cannot allocate transfer buffer (%s)\n",
+                     strerror(errno));
+               ret = -ENOMEM;
+               goto err;
+       }
+       memcpy(transfer_buffer, buffer, len);
+
+       dev->transfer->flags |= LIBUSB_TRANSFER_FREE_BUFFER;
+       libusb_fill_bulk_transfer(dev->transfer, dev->usb_device, 0x1,
+                                 transfer_buffer, len,
+                                 send_data_async_complete_cb, dev, 0);
+
+       /* wait for the previous transfer to complete */
+       wait_for_trasfer_completed(dev);
+
+       trace_dump_buffer(dev->ctx, "sending -->", buffer, len);
+
+       dev->transfer_completed = 0;
+       ret = libusb_submit_transfer(dev->transfer);
+       if (ret < 0)
+               goto err;
+
+       return 0;
+
+err:
+       libusb_free_transfer(dev->transfer);
+       dev->transfer = NULL;
+       return ret;
+}
+
 static void serialize_header(struct am7xxx_header *h, uint8_t *buffer)
 {
        uint8_t **buffer_iterator = &buffer;
 static void serialize_header(struct am7xxx_header *h, uint8_t *buffer)
 {
        uint8_t **buffer_iterator = &buffer;
@@ -423,6 +598,28 @@ static int send_header(am7xxx_device *dev, struct am7xxx_header *h)
        return ret;
 }
 
        return ret;
 }
 
+static int send_command(am7xxx_device *dev, am7xxx_packet_type type)
+{
+       struct am7xxx_header h = {
+               .packet_type     = type,
+               .direction       = AM7XXX_DIRECTION_OUT,
+               .header_data_len = 0x00,
+               .unknown2        = 0x3e,
+               .unknown3        = 0x10,
+               .header_data = {
+                       .data = {
+                               .field0 = 0,
+                               .field1 = 0,
+                               .field2 = 0,
+                               .field3 = 0,
+                       },
+               },
+       };
+
+       return send_header(dev, &h);
+}
+
+
 /* When level == AM7XXX_LOG_FATAL do not check the log_level from the context
  * and print the message unconditionally, this makes it possible to print
  * fatal messages even early on initialization, before the context has been
 /* When level == AM7XXX_LOG_FATAL do not check the log_level from the context
  * and print the message unconditionally, this makes it possible to print
  * fatal messages even early on initialization, before the context has been
@@ -472,6 +669,7 @@ static am7xxx_device *add_new_device(am7xxx_context *ctx,
 
        new_device->ctx = ctx;
        new_device->desc = desc;
 
        new_device->ctx = ctx;
        new_device->desc = desc;
+       new_device->transfer_completed = 1;
 
        devices_list = &(ctx->devices_list);
 
 
        devices_list = &(ctx->devices_list);
 
@@ -529,7 +727,7 @@ typedef enum {
 static int scan_devices(am7xxx_context *ctx, scan_op op,
                        unsigned int open_device_index, am7xxx_device **dev)
 {
 static int scan_devices(am7xxx_context *ctx, scan_op op,
                        unsigned int open_device_index, am7xxx_device **dev)
 {
-       int num_devices;
+       ssize_t num_devices;
        libusb_device** list;
        unsigned int current_index;
        int i;
        libusb_device** list;
        unsigned int current_index;
        int i;
@@ -606,17 +804,21 @@ static int scan_devices(am7xxx_context *ctx, scan_op op,
                                         * close it again before bailing out.
                                         */
 
                                         * close it again before bailing out.
                                         */
 
-                                       ret = libusb_set_configuration((*dev)->usb_device, 2);
+                                       ret = libusb_set_configuration((*dev)->usb_device,
+                                                                      (*dev)->desc->configuration);
                                        if (ret < 0) {
                                                debug(ctx, "libusb_set_configuration failed\n");
                                        if (ret < 0) {
                                                debug(ctx, "libusb_set_configuration failed\n");
-                                               debug(ctx, "Cannot set configuration 2\n");
+                                               debug(ctx, "Cannot set configuration %hhu\n",
+                                                     (*dev)->desc->configuration);
                                                goto out_libusb_close;
                                        }
 
                                                goto out_libusb_close;
                                        }
 
-                                       ret = libusb_claim_interface((*dev)->usb_device, 0);
+                                       ret = libusb_claim_interface((*dev)->usb_device,
+                                                                    (*dev)->desc->interface_number);
                                        if (ret < 0) {
                                                debug(ctx, "libusb_claim_interface failed\n");
                                        if (ret < 0) {
                                                debug(ctx, "libusb_claim_interface failed\n");
-                                               debug(ctx, "Cannot claim interface 0\n");
+                                               debug(ctx, "Cannot claim interface %hhu\n",
+                                                     (*dev)->desc->interface_number);
 out_libusb_close:
                                                libusb_close((*dev)->usb_device);
                                                (*dev)->usb_device = NULL;
 out_libusb_close:
                                                libusb_close((*dev)->usb_device);
                                                (*dev)->usb_device = NULL;
@@ -644,11 +846,167 @@ out:
        return ret;
 }
 
        return ret;
 }
 
+/* Device specific operations */
+
+static int default_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
+{
+       int ret;
+       struct am7xxx_header h = {
+               .packet_type     = AM7XXX_PACKET_TYPE_POWER,
+               .direction       = AM7XXX_DIRECTION_OUT,
+               .header_data_len = sizeof(struct am7xxx_power_header),
+               .unknown2        = 0x3e,
+               .unknown3        = 0x10,
+       };
+
+       switch(power) {
+       case AM7XXX_POWER_OFF:
+               h.header_data.power.bit2 = 0;
+               h.header_data.power.bit1 = 0;
+               h.header_data.power.bit0 = 0;
+               break;
+
+       case AM7XXX_POWER_LOW:
+               h.header_data.power.bit2 = 0;
+               h.header_data.power.bit1 = 0;
+               h.header_data.power.bit0 = 1;
+               break;
+
+       case AM7XXX_POWER_MIDDLE:
+               h.header_data.power.bit2 = 0;
+               h.header_data.power.bit1 = 1;
+               h.header_data.power.bit0 = 0;
+               break;
+
+       case AM7XXX_POWER_HIGH:
+               h.header_data.power.bit2 = 0;
+               h.header_data.power.bit1 = 1;
+               h.header_data.power.bit0 = 1;
+               break;
+
+       case AM7XXX_POWER_TURBO:
+               h.header_data.power.bit2 = 1;
+               h.header_data.power.bit1 = 0;
+               h.header_data.power.bit0 = 0;
+               break;
+
+       default:
+               error(dev->ctx, "Unsupported power mode.\n");
+               return -EINVAL;
+       };
+
+       ret = send_header(dev, &h);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+static int picopix_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
+{
+       switch(power) {
+       case AM7XXX_POWER_LOW:
+               return send_command(dev, AM7XXX_PACKET_TYPE_PICOPIX_POWER_LOW);
+
+       case AM7XXX_POWER_MIDDLE:
+               return send_command(dev, AM7XXX_PACKET_TYPE_PICOPIX_POWER_MEDIUM);
+
+       case AM7XXX_POWER_HIGH:
+               return send_command(dev, AM7XXX_PACKET_TYPE_PICOPIX_POWER_HIGH);
+
+       case AM7XXX_POWER_OFF:
+       case AM7XXX_POWER_TURBO:
+       default:
+               error(dev->ctx, "Unsupported power mode.\n");
+               return -EINVAL;
+       };
+}
+
+static int default_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
+{
+       int ret;
+       struct am7xxx_header h = {
+               .packet_type     = AM7XXX_PACKET_TYPE_ZOOM,
+               .direction       = AM7XXX_DIRECTION_OUT,
+               .header_data_len = sizeof(struct am7xxx_zoom_header),
+               .unknown2        = 0x3e,
+               .unknown3        = 0x10,
+       };
+
+       switch(zoom) {
+       case AM7XXX_ZOOM_ORIGINAL:
+               h.header_data.zoom.bit1 = 0;
+               h.header_data.zoom.bit0 = 0;
+               break;
+
+       case AM7XXX_ZOOM_H:
+               h.header_data.zoom.bit1 = 0;
+               h.header_data.zoom.bit0 = 1;
+               break;
+
+       case AM7XXX_ZOOM_H_V:
+               h.header_data.zoom.bit1 = 1;
+               h.header_data.zoom.bit0 = 0;
+               break;
+
+       case AM7XXX_ZOOM_TEST:
+               h.header_data.zoom.bit1 = 1;
+               h.header_data.zoom.bit0 = 1;
+               break;
+
+       case AM7XXX_ZOOM_TELE:
+       default:
+               error(dev->ctx, "Unsupported zoom mode.\n");
+               return -EINVAL;
+       };
+
+       ret = send_header(dev, &h);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+static int picopix_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
+{
+       int ret;
+       am7xxx_packet_type packet_type;
+
+       switch(zoom) {
+       case AM7XXX_ZOOM_ORIGINAL:
+               packet_type = AM7XXX_PACKET_TYPE_PICOPIX_DISABLE_TI;
+               break;
+
+       case AM7XXX_ZOOM_TELE:
+               packet_type = AM7XXX_PACKET_TYPE_PICOPIX_ENABLE_TI;
+               break;
+
+       case AM7XXX_ZOOM_H:
+       case AM7XXX_ZOOM_H_V:
+       case AM7XXX_ZOOM_TEST:
+       default:
+               error(dev->ctx, "Unsupported zoom mode.\n");
+               return -EINVAL;
+       };
+
+       ret = send_command(dev, packet_type);
+       if (ret < 0)
+               return ret;
+
+       /* The Windows drivers wait for 100ms and send the same command again,
+        * probably to overcome a firmware deficiency */
+       ret = msleep(100);
+       if (ret < 0)
+               return ret;
+
+       return send_command(dev, packet_type);
+}
+
 /* Public API */
 
 AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx)
 {
 /* Public API */
 
 AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx)
 {
-       int ret = 0;
+       int ret;
 
        *ctx = malloc(sizeof(**ctx));
        if (*ctx == NULL) {
 
        *ctx = malloc(sizeof(**ctx));
        if (*ctx == NULL) {
@@ -665,7 +1023,7 @@ AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx)
        if (ret < 0)
                goto out_free_context;
 
        if (ret < 0)
                goto out_free_context;
 
-       libusb_set_debug((*ctx)->usb_context, 3);
+       libusb_set_debug((*ctx)->usb_context, LIBUSB_LOG_LEVEL_INFO);
 
        ret = scan_devices(*ctx, SCAN_OP_BUILD_DEVLIST , 0, NULL);
        if (ret < 0) {
 
        ret = scan_devices(*ctx, SCAN_OP_BUILD_DEVLIST , 0, NULL);
        if (ret < 0) {
@@ -758,7 +1116,8 @@ AM7XXX_PUBLIC int am7xxx_close_device(am7xxx_device *dev)
                return -EINVAL;
        }
        if (dev->usb_device) {
                return -EINVAL;
        }
        if (dev->usb_device) {
-               libusb_release_interface(dev->usb_device, 0);
+               wait_for_trasfer_completed(dev);
+               libusb_release_interface(dev->usb_device, dev->desc->interface_number);
                libusb_close(dev->usb_device);
                dev->usb_device = NULL;
        }
                libusb_close(dev->usb_device);
                dev->usb_device = NULL;
        }
@@ -769,31 +1128,18 @@ AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev,
                           am7xxx_device_info *device_info)
 {
        int ret;
                           am7xxx_device_info *device_info)
 {
        int ret;
-       struct am7xxx_header h = {
-               .packet_type     = AM7XXX_PACKET_TYPE_DEVINFO,
-               .direction       = AM7XXX_DIRECTION_OUT,
-               .header_data_len = 0x00,
-               .unknown2        = 0x3e,
-               .unknown3        = 0x10,
-               .header_data = {
-                       .devinfo = {
-                               .native_width  = 0,
-                               .native_height = 0,
-                               .unknown0      = 0,
-                               .unknown1      = 0,
-                       },
-               },
-       };
+       struct am7xxx_header h;
 
        if (dev->device_info) {
                memcpy(device_info, dev->device_info, sizeof(*device_info));
                return 0;
        }
 
 
        if (dev->device_info) {
                memcpy(device_info, dev->device_info, sizeof(*device_info));
                return 0;
        }
 
-       ret = send_header(dev, &h);
+       ret = send_command(dev, AM7XXX_PACKET_TYPE_DEVINFO);
        if (ret < 0)
                return ret;
 
        if (ret < 0)
                return ret;
 
+       memset(&h, 0, sizeof(h));
        ret = read_header(dev, &h);
        if (ret < 0)
                return ret;
        ret = read_header(dev, &h);
        if (ret < 0)
                return ret;
@@ -922,100 +1268,60 @@ AM7XXX_PUBLIC int am7xxx_send_image(am7xxx_device *dev,
        return send_data(dev, image, image_size);
 }
 
        return send_data(dev, image, image_size);
 }
 
-AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
+AM7XXX_PUBLIC int am7xxx_send_image_async(am7xxx_device *dev,
+                                         am7xxx_image_format format,
+                                         unsigned int width,
+                                         unsigned int height,
+                                         uint8_t *image,
+                                         unsigned int image_size)
 {
        int ret;
        struct am7xxx_header h = {
 {
        int ret;
        struct am7xxx_header h = {
-               .packet_type     = AM7XXX_PACKET_TYPE_POWER,
+               .packet_type     = AM7XXX_PACKET_TYPE_IMAGE,
                .direction       = AM7XXX_DIRECTION_OUT,
                .direction       = AM7XXX_DIRECTION_OUT,
-               .header_data_len = sizeof(struct am7xxx_power_header),
+               .header_data_len = sizeof(struct am7xxx_image_header),
                .unknown2        = 0x3e,
                .unknown3        = 0x10,
                .unknown2        = 0x3e,
                .unknown3        = 0x10,
-       };
-
-       switch(power) {
-       case AM7XXX_POWER_OFF:
-               h.header_data.power.bit2 = 0;
-               h.header_data.power.bit1 = 0;
-               h.header_data.power.bit0 = 0;
-               break;
-
-       case AM7XXX_POWER_LOW:
-               h.header_data.power.bit2 = 0;
-               h.header_data.power.bit1 = 0;
-               h.header_data.power.bit0 = 1;
-               break;
-
-       case AM7XXX_POWER_MIDDLE:
-               h.header_data.power.bit2 = 0;
-               h.header_data.power.bit1 = 1;
-               h.header_data.power.bit0 = 0;
-               break;
-
-       case AM7XXX_POWER_HIGH:
-               h.header_data.power.bit2 = 0;
-               h.header_data.power.bit1 = 1;
-               h.header_data.power.bit0 = 1;
-               break;
-
-       case AM7XXX_POWER_TURBO:
-               h.header_data.power.bit2 = 1;
-               h.header_data.power.bit1 = 0;
-               h.header_data.power.bit0 = 0;
-               break;
-
-       default:
-               error(dev->ctx, "Unsupported power mode.\n");
-               return -EINVAL;
+               .header_data = {
+                       .image = {
+                               .format     = format,
+                               .width      = width,
+                               .height     = height,
+                               .image_size = image_size,
+                       },
+               },
        };
 
        ret = send_header(dev, &h);
        if (ret < 0)
                return ret;
 
        };
 
        ret = send_header(dev, &h);
        if (ret < 0)
                return ret;
 
-       return 0;
+       if (image == NULL || image_size == 0) {
+               warning(dev->ctx, "Not sending any data, check the 'image' or 'image_size' parameters\n");
+               return 0;
+       }
+
+       return send_data_async(dev, image, image_size);
 }
 
 }
 
-AM7XXX_PUBLIC int am7xxx_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
+AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
 {
 {
-       int ret;
-       struct am7xxx_header h = {
-               .packet_type     = AM7XXX_PACKET_TYPE_ZOOM,
-               .direction       = AM7XXX_DIRECTION_OUT,
-               .header_data_len = sizeof(struct am7xxx_zoom_header),
-               .unknown2        = 0x3e,
-               .unknown3        = 0x10,
-       };
-
-       switch(zoom) {
-       case AM7XXX_ZOOM_ORIGINAL:
-               h.header_data.zoom.bit1 = 0;
-               h.header_data.zoom.bit0 = 0;
-               break;
-
-       case AM7XXX_ZOOM_H:
-               h.header_data.zoom.bit1 = 0;
-               h.header_data.zoom.bit0 = 1;
-               break;
-
-       case AM7XXX_ZOOM_H_V:
-               h.header_data.zoom.bit1 = 1;
-               h.header_data.zoom.bit0 = 0;
-               break;
-
-       case AM7XXX_ZOOM_TEST:
-               h.header_data.zoom.bit1 = 1;
-               h.header_data.zoom.bit0 = 1;
-               break;
+       if (dev->desc->ops.set_power_mode == NULL) {
+               warning(dev->ctx,
+                       "setting power mode is unsupported on this device\n");
+               return 0;
+       }
 
 
-       default:
-               error(dev->ctx, "Unsupported zoom mode.\n");
-               return -EINVAL;
-       };
+       return dev->desc->ops.set_power_mode(dev, power);
+}
 
 
-       ret = send_header(dev, &h);
-       if (ret < 0)
-               return ret;
+AM7XXX_PUBLIC int am7xxx_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
+{
+       if (dev->desc->ops.set_zoom_mode == NULL) {
+               warning(dev->ctx,
+                       "setting zoom mode is unsupported on this device\n");
+               return 0;
+       }
 
 
-       return 0;
+       return dev->desc->ops.set_zoom_mode(dev, zoom);
 }
 }
Open Source library to communicate via USB with Projectors and Digital Picture Frames based on the Actions Micro AM7XXX family of ICs