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contrib: add some udev rules to let normal users access the devices
[libam7xxx.git] / src / am7xxx.c
diff --git a/src/am7xxx.c b/src/am7xxx.c
index ecef379..7ef981e 100644 (file)
--- a/src/am7xxx.c
+++ b/src/am7xxx.c
@@ -17,27 +17,91 @@
  */
 
 #include <stdio.h>
  */
 
 #include <stdio.h>
-#include <endian.h>
+#include <stdlib.h>
 #include <errno.h>
 
 #include "am7xxx.h"
 #include <errno.h>
 
 #include "am7xxx.h"
+#include "serialize.h"
 
 #define AM7XXX_VENDOR_ID  0x1de1
 #define AM7XXX_PRODUCT_ID 0xc101
 
 
 #define AM7XXX_VENDOR_ID  0x1de1
 #define AM7XXX_PRODUCT_ID 0xc101
 
-#if 1
-static uint8_t reference_image_header[] = {
-       0x02, 0x00, 0x00, 0x00,
-       0x00,
-       0x10,
-       0x3e,
-       0x10,
-       0x01, 0x00, 0x00, 0x00,
-       0x20, 0x03, 0x00, 0x00,
-       0xe0, 0x01, 0x00, 0x00,
-       0x53, 0xE8, 0x00, 0x00
+typedef enum {
+       AM7XXX_PACKET_TYPE_DEVINFO = 0x01,
+       AM7XXX_PACKET_TYPE_IMAGE   = 0x02,
+       AM7XXX_PACKET_TYPE_POWER   = 0x04,
+       AM7XXX_PACKET_TYPE_UNKNOWN = 0x05,
+} am7xxx_packet_type;
+
+struct am7xxx_generic_header {
+       uint32_t field0;
+       uint32_t field1;
+       uint32_t field2;
+       uint32_t field3;
+};
+
+struct am7xxx_devinfo_header {
+       uint32_t native_width;
+       uint32_t native_height;
+       uint32_t unknown0;
+       uint32_t unknown1;
+};
+
+struct am7xxx_image_header {
+       uint32_t format;
+       uint32_t width;
+       uint32_t height;
+       uint32_t image_size;
 };
 };
-#endif
+
+struct am7xxx_power_header {
+       uint32_t bit2;
+       uint32_t bit1;
+       uint32_t bit0;
+};
+
+/*
+ * Examples of packet headers:
+ *
+ * Image header:
+ * 02 00 00 00 00 10 3e 10 01 00 00 00 20 03 00 00 e0 01 00 00 53 E8 00 00
+ *
+ * Power header:
+ * 04 00 00 00 00 0c ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ */
+
+/* The header size on the wire is known to be always 24 bytes, regardless of
+ * the memory configuration enforced by different architechtures or compilers
+ * for struct am7xxx_header
+ */
+#define AM7XXX_HEADER_WIRE_SIZE 24
+
+struct am7xxx_header {
+       uint32_t packet_type;
+       uint8_t unknown0;
+       uint8_t header_data_len;
+       uint8_t unknown2;
+       uint8_t unknown3;
+       union {
+               struct am7xxx_generic_header data;
+               struct am7xxx_devinfo_header devinfo;
+               struct am7xxx_image_header image;
+               struct am7xxx_power_header power;
+       } header_data;
+};
+
+
+static void dump_devinfo_header(struct am7xxx_devinfo_header *d)
+{
+       if (d == NULL)
+               return;
+
+       printf("Info header:\n");
+       printf("\tnative_width:  0x%08x (%u)\n", d->native_width, d->native_width);
+       printf("\tnative_height: 0x%08x (%u)\n", d->native_height, d->native_height);
+       printf("\tunknown0:      0x%08x (%u)\n", d->unknown0, d->unknown0);
+       printf("\tunknown1:      0x%08x (%u)\n", d->unknown1, d->unknown1);
+}
 
 static void dump_image_header(struct am7xxx_image_header *i)
 {
 
 static void dump_image_header(struct am7xxx_image_header *i)
 {
@@ -45,10 +109,21 @@ static void dump_image_header(struct am7xxx_image_header *i)
                return;
 
        printf("Image header:\n");
                return;
 
        printf("Image header:\n");
-       printf("format:      0x%08x (%u)\n", i->format, i->format);
-       printf("width:       0x%08x (%u)\n", i->width, i->width);
-       printf("height:      0x%08x (%u)\n", i->height, i->height);
-       printf("image size:  0x%08x (%u)\n", i->image_size, i->image_size);
+       printf("\tformat:     0x%08x (%u)\n", i->format, i->format);
+       printf("\twidth:      0x%08x (%u)\n", i->width, i->width);
+       printf("\theight:     0x%08x (%u)\n", i->height, i->height);
+       printf("\timage size: 0x%08x (%u)\n", i->image_size, i->image_size);
+}
+
+static void dump_power_header(struct am7xxx_power_header *p)
+{
+       if (p == NULL)
+               return;
+
+       printf("Power header:\n");
+       printf("\tbit2: 0x%08x (%u)\n", p->bit2, p->bit2);
+       printf("\tbit1: 0x%08x (%u)\n", p->bit1, p->bit1);
+       printf("\tbit0: 0x%08x (%u)\n", p->bit0, p->bit0);
 }
 
 static void dump_header(struct am7xxx_header *h)
 }
 
 static void dump_header(struct am7xxx_header *h)
@@ -63,10 +138,18 @@ static void dump_header(struct am7xxx_header *h)
        printf("unknown3:        0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
 
        switch(h->packet_type) {
        printf("unknown3:        0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
 
        switch(h->packet_type) {
+       case AM7XXX_PACKET_TYPE_DEVINFO:
+               dump_devinfo_header(&(h->header_data.devinfo));
+               break;
+
        case AM7XXX_PACKET_TYPE_IMAGE:
                dump_image_header(&(h->header_data.image));
                break;
 
        case AM7XXX_PACKET_TYPE_IMAGE:
                dump_image_header(&(h->header_data.image));
                break;
 
+       case AM7XXX_PACKET_TYPE_POWER:
+               dump_power_header(&(h->header_data.power));
+               break;
+
        default:
                printf("Packet type not supported!\n");
                break;
        default:
                printf("Packet type not supported!\n");
                break;
@@ -77,6 +160,8 @@ static void dump_header(struct am7xxx_header *h)
 
 static inline unsigned int in_80chars(unsigned int i)
 {
 
 static inline unsigned int in_80chars(unsigned int i)
 {
+       /* The 3 below is the length of "xx " where xx is the hex string
+        * representation of a byte */
        return ((i+1) % (80/3));
 }
 
        return ((i+1) % (80/3));
 }
 
@@ -93,12 +178,37 @@ static void dump_buffer(uint8_t *buffer, unsigned int len)
        fflush(stdout);
 }
 
        fflush(stdout);
 }
 
+static int read_data(am7xxx_device dev, uint8_t *buffer, unsigned int len)
+{
+       int ret;
+       int transferred;
+
+       ret = libusb_bulk_transfer(dev, 0x81, buffer, len, &transferred, 0);
+       if (ret != 0 || (unsigned int)transferred != len) {
+               fprintf(stderr, "Error: ret: %d\ttransferred: %d (expected %u)\n",
+                       ret, transferred, len);
+               return ret;
+       }
+
+#if DEBUG
+       printf("\n<-- received\n");
+       dump_buffer(buffer, len);
+       printf("\n");
+#endif
+
+       return 0;
+}
+
 static int send_data(am7xxx_device dev, uint8_t *buffer, unsigned int len)
 {
        int ret;
        int transferred;
 
 static int send_data(am7xxx_device dev, uint8_t *buffer, unsigned int len)
 {
        int ret;
        int transferred;
 
+#if DEBUG
+       printf("\nsending -->\n");
        dump_buffer(buffer, len);
        dump_buffer(buffer, len);
+       printf("\n");
+#endif
 
        ret = libusb_bulk_transfer(dev, 1, buffer, len, &transferred, 0);
        if (ret != 0 || (unsigned int)transferred != len) {
 
        ret = libusb_bulk_transfer(dev, 1, buffer, len, &transferred, 0);
        if (ret != 0 || (unsigned int)transferred != len) {
@@ -110,16 +220,90 @@ static int send_data(am7xxx_device dev, uint8_t *buffer, unsigned int len)
        return 0;
 }
 
        return 0;
 }
 
+static void serialize_header(struct am7xxx_header *h, uint8_t *buffer)
+{
+       uint8_t **buffer_iterator = &buffer;
+
+       put_le32(h->packet_type, buffer_iterator);
+       put_8(h->unknown0, buffer_iterator);
+       put_8(h->header_data_len, buffer_iterator);
+       put_8(h->unknown2, buffer_iterator);
+       put_8(h->unknown3, buffer_iterator);
+       put_le32(h->header_data.data.field0, buffer_iterator);
+       put_le32(h->header_data.data.field1, buffer_iterator);
+       put_le32(h->header_data.data.field2, buffer_iterator);
+       put_le32(h->header_data.data.field3, buffer_iterator);
+}
+
+static void unserialize_header(uint8_t *buffer, struct am7xxx_header *h)
+{
+       uint8_t **buffer_iterator = &buffer;
+
+       h->packet_type = get_le32(buffer_iterator);
+       h->unknown0 = get_8(buffer_iterator);
+       h->header_data_len = get_8(buffer_iterator);
+       h->unknown2 = get_8(buffer_iterator);
+       h->unknown3 = get_8(buffer_iterator);
+       h->header_data.data.field0 = get_le32(buffer_iterator);
+       h->header_data.data.field1 = get_le32(buffer_iterator);
+       h->header_data.data.field2 = get_le32(buffer_iterator);
+       h->header_data.data.field3 = get_le32(buffer_iterator);
+}
+
+static int read_header(am7xxx_device dev, struct am7xxx_header *h)
+{
+       uint8_t *buffer;
+       int ret;
+
+       buffer = calloc(AM7XXX_HEADER_WIRE_SIZE, 1);
+       if (buffer == NULL) {
+               perror("calloc buffer");
+               return -ENOMEM;
+       }
+
+       ret = read_data(dev, buffer, AM7XXX_HEADER_WIRE_SIZE);
+       if (ret < 0)
+               goto out;
+
+       unserialize_header(buffer, h);
+
+#if DEBUG
+       printf("\n");
+       dump_header(h);
+       printf("\n");
+#endif
+
+       ret = 0;
+
+out:
+       free(buffer);
+       return ret;
+}
+
 static int send_header(am7xxx_device dev, struct am7xxx_header *h)
 {
 static int send_header(am7xxx_device dev, struct am7xxx_header *h)
 {
-       union {
-               struct am7xxx_header header;
-               uint8_t buffer[sizeof (struct am7xxx_header)];
-       } data;
+       uint8_t *buffer;
+       int ret;
 
 
-       data.header = *h;
+#if DEBUG
+       printf("\n");
+       dump_header(h);
+       printf("\n");
+#endif
 
 
-       return send_data(dev, data.buffer, sizeof (struct am7xxx_header));
+       buffer = calloc(AM7XXX_HEADER_WIRE_SIZE, 1);
+       if (buffer == NULL) {
+               perror("calloc buffer");
+               return -ENOMEM;
+       }
+
+       serialize_header(h, buffer);
+       ret = send_data(dev, buffer, AM7XXX_HEADER_WIRE_SIZE);
+       if (ret < 0)
+               fprintf(stderr, "send_header: failed to send data.\n");
+
+       free(buffer);
+       return ret;
 }
 
 am7xxx_device am7xxx_init(void)
 }
 
 am7xxx_device am7xxx_init(void)
@@ -156,6 +340,45 @@ void am7xxx_shutdown(am7xxx_device dev)
        }
 }
 
        }
 }
 
+int am7xxx_get_device_info(am7xxx_device dev,
+                          unsigned int *native_width,
+                          unsigned int *native_height,
+                          unsigned int *unknown0,
+                          unsigned int *unknown1)
+{
+       int ret;
+       struct am7xxx_header h = {
+               .packet_type     = AM7XXX_PACKET_TYPE_DEVINFO,
+               .unknown0        = 0x00,
+               .header_data_len = 0x00,
+               .unknown2        = 0x3e,
+               .unknown3        = 0x10,
+               .header_data = {
+                       .devinfo = {
+                               .native_width  = 0,
+                               .native_height = 0,
+                               .unknown0      = 0,
+                               .unknown1      = 0,
+                       },
+               },
+       };
+
+       ret = send_header(dev, &h);
+       if (ret < 0)
+               return ret;
+
+       ret = read_header(dev, &h);
+       if (ret < 0)
+               return ret;
+
+       *native_width = h.header_data.devinfo.native_width;
+       *native_height = h.header_data.devinfo.native_height;
+       *unknown0 = h.header_data.devinfo.unknown0;
+       *unknown1 = h.header_data.devinfo.unknown1;
+
+       return 0;
+}
+
 int am7xxx_send_image(am7xxx_device dev,
                      am7xxx_image_format format,
                      unsigned int width,
 int am7xxx_send_image(am7xxx_device dev,
                      am7xxx_image_format format,
                      unsigned int width,
@@ -165,27 +388,21 @@ int am7xxx_send_image(am7xxx_device dev,
 {
        int ret;
        struct am7xxx_header h = {
 {
        int ret;
        struct am7xxx_header h = {
-               .packet_type     = htole32(AM7XXX_PACKET_TYPE_IMAGE),
+               .packet_type     = AM7XXX_PACKET_TYPE_IMAGE,
                .unknown0        = 0x00,
                .header_data_len = sizeof(struct am7xxx_image_header),
                .unknown2        = 0x3e,
                .unknown3        = 0x10,
                .header_data = {
                        .image = {
                .unknown0        = 0x00,
                .header_data_len = sizeof(struct am7xxx_image_header),
                .unknown2        = 0x3e,
                .unknown3        = 0x10,
                .header_data = {
                        .image = {
-                               .format     = htole32(format),
-                               .width      = htole32(width),
-                               .height     = htole32(height),
-                               .image_size = htole32(size),
+                               .format     = format,
+                               .width      = width,
+                               .height     = height,
+                               .image_size = size,
                        },
                },
        };
 
                        },
                },
        };
 
-       dump_header(&h);
-       printf("\n");
-
-       printf("Dump Buffers\n");
-       dump_buffer(reference_image_header, sizeof(struct am7xxx_header));
-
        ret = send_header(dev, &h);
        if (ret < 0)
                return ret;
        ret = send_header(dev, &h);
        if (ret < 0)
                return ret;
@@ -195,3 +412,56 @@ int am7xxx_send_image(am7xxx_device dev,
 
        return send_data(dev, image, size);
 }
 
        return send_data(dev, image, size);
 }
+
+int am7xxx_set_power_mode(am7xxx_device dev, am7xxx_power_mode mode)
+{
+       int ret;
+       struct am7xxx_header h = {
+               .packet_type     = AM7XXX_PACKET_TYPE_POWER,
+               .unknown0        = 0x00,
+               .header_data_len = sizeof(struct am7xxx_power_header),
+               .unknown2        = 0x3e,
+               .unknown3        = 0x10,
+       };
+
+       switch(mode) {
+       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;
+
+       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:
+               fprintf(stderr, "Unsupported power mode.\n");
+               return -EINVAL;
+       };
+
+       ret = send_header(dev, &h);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
Open Source library to communicate via USB with Projectors and Digital Picture Frames based on the Actions Micro AM7XXX family of ICs