X-Git-Url: https://git.ao2.it/libam7xxx.git/blobdiff_plain/b9a31ad87f63016dc9f914f61ab06606a948aa90..45e0326f3c336070c59b7e501a2c720dd0a203aa:/src/am7xxx.c diff --git a/src/am7xxx.c b/src/am7xxx.c index ecef379..272a249 100644 --- a/src/am7xxx.c +++ b/src/am7xxx.c @@ -17,27 +17,116 @@ */ #include -#include +#include +#include #include +#include #include "am7xxx.h" +#include "serialize.h" -#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 +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +struct am7xxx_usb_device_descriptor { + const char *name; + uint16_t vendor_id; + uint16_t product_id; +}; + +static struct am7xxx_usb_device_descriptor supported_devices[] = { + { + .name = "Acer C110", + .vendor_id = 0x1de1, + .product_id = 0xc101, + }, + { + .name = "Philips/Sagemcom PicoPix 1020", + .vendor_id = 0x21e7, + .product_id = 0x000e, + }, +}; + +/* 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_device { + libusb_device_handle *usb_device; + uint8_t buffer[AM7XXX_HEADER_WIRE_SIZE]; +}; + +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 + */ + +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) { @@ -45,10 +134,21 @@ static void dump_image_header(struct am7xxx_image_header *i) 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) @@ -63,10 +163,18 @@ static void dump_header(struct am7xxx_header *h) 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_POWER: + dump_power_header(&(h->header_data.power)); + break; + default: printf("Packet type not supported!\n"); break; @@ -77,6 +185,8 @@ static void dump_header(struct am7xxx_header *h) 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)); } @@ -93,14 +203,39 @@ static void dump_buffer(uint8_t *buffer, unsigned int len) fflush(stdout); } -static int send_data(am7xxx_device dev, uint8_t *buffer, unsigned int len) +static int read_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len) { int ret; - int transferred; + int transferred = 0; + + ret = libusb_bulk_transfer(dev->usb_device, 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; +} - ret = libusb_bulk_transfer(dev, 1, buffer, len, &transferred, 0); +static int send_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len) +{ + int ret; + int transferred = 0; + +#if DEBUG + printf("\nsending -->\n"); + dump_buffer(buffer, len); + printf("\n"); +#endif + + ret = libusb_bulk_transfer(dev->usb_device, 1, buffer, len, &transferred, 0); if (ret != 0 || (unsigned int)transferred != len) { fprintf(stderr, "Error: ret: %d\ttransferred: %d (expected %u)\n", ret, transferred, len); @@ -110,53 +245,167 @@ static int send_data(am7xxx_device dev, uint8_t *buffer, unsigned int len) return 0; } -static int send_header(am7xxx_device dev, struct am7xxx_header *h) +static void serialize_header(struct am7xxx_header *h, uint8_t *buffer) { - union { - struct am7xxx_header header; - uint8_t buffer[sizeof (struct am7xxx_header)]; - } data; + 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) +{ + int ret; + + ret = read_data(dev, dev->buffer, AM7XXX_HEADER_WIRE_SIZE); + if (ret < 0) + goto out; + + unserialize_header(dev->buffer, h); + +#if DEBUG + printf("\n"); + dump_header(h); + printf("\n"); +#endif + + ret = 0; + +out: + return ret; +} + +static int send_header(am7xxx_device *dev, struct am7xxx_header *h) +{ + int ret; + +#if DEBUG + printf("\n"); + dump_header(h); + printf("\n"); +#endif - data.header = *h; + serialize_header(h, dev->buffer); + ret = send_data(dev, dev->buffer, AM7XXX_HEADER_WIRE_SIZE); + if (ret < 0) + fprintf(stderr, "send_header: failed to send data.\n"); - return send_data(dev, data.buffer, sizeof (struct am7xxx_header)); + return ret; } -am7xxx_device am7xxx_init(void) +am7xxx_device *am7xxx_init(void) { - am7xxx_device dev; + unsigned int i; + + am7xxx_device *dev = malloc(sizeof(*dev)); + if (dev == NULL) { + perror("malloc"); + goto out; + } + memset(dev, 0, sizeof(*dev)); libusb_init(NULL); libusb_set_debug(NULL, 3); - dev = libusb_open_device_with_vid_pid(NULL, - AM7XXX_VENDOR_ID, - AM7XXX_PRODUCT_ID); - if (dev == NULL) { + for (i = 0; i < ARRAY_SIZE(supported_devices); i++) { + dev->usb_device = libusb_open_device_with_vid_pid(NULL, + supported_devices[i].vendor_id, + supported_devices[i].product_id); + if (dev->usb_device) { + printf("%s: device found: %s\n", __func__, supported_devices[i].name); + break; + } + } + if (dev->usb_device == NULL) { errno = ENODEV; perror("libusb_open_device_with_vid_pid"); goto out_libusb_exit; } - libusb_set_configuration(dev, 1); - libusb_claim_interface(dev, 0); + libusb_set_configuration(dev->usb_device, 1); + libusb_claim_interface(dev->usb_device, 0); return dev; out_libusb_exit: libusb_exit(NULL); + free(dev); +out: return NULL; } -void am7xxx_shutdown(am7xxx_device dev) +void am7xxx_shutdown(am7xxx_device *dev) { if (dev) { - libusb_close(dev); + libusb_close(dev->usb_device); libusb_exit(NULL); + free(dev); + dev = NULL; } } -int am7xxx_send_image(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, unsigned int height, @@ -165,27 +414,21 @@ int am7xxx_send_image(am7xxx_device dev, { 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 = { - .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; @@ -195,3 +438,56 @@ int am7xxx_send_image(am7xxx_device dev, 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; +}