X-Git-Url: https://git.ao2.it/libam7xxx.git/blobdiff_plain/b162f59656e930be8826a0202b994c3cc4835882..028846b8800dd3ebcc530b20164a8e37602c546c:/src/am7xxx.c?ds=inline diff --git a/src/am7xxx.c b/src/am7xxx.c index 483eaf7..94b01ac 100644 --- a/src/am7xxx.c +++ b/src/am7xxx.c @@ -1,6 +1,6 @@ /* am7xxx - communication with AM7xxx based USB Pico Projectors and DPFs * - * Copyright (C) 2012 Antonio Ospite + * Copyright (C) 2012-2014 Antonio Ospite * * 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 @@ -18,48 +18,323 @@ #include #include +#include +#include #include +#include +#include #include "am7xxx.h" #include "serialize.h" +#include "tools.h" -#define AM7XXX_VENDOR_ID 0x1de1 -#define AM7XXX_PRODUCT_ID 0xc101 +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) -static void dump_image_header(struct am7xxx_image_header *i) +/* If we're not using GNU C, elide __attribute__ + * taken from: http://unixwiz.net/techtips/gnu-c-attributes.html) + */ +#ifndef __GNUC__ +# define __attribute__(x) /* NOTHING */ +#endif + +/* Control shared library symbols visibility */ +#if defined _WIN32 || defined __CYGWIN__ + #define AM7XXX_PUBLIC __declspec(dllexport) + #define AM7XXX_LOCAL +#else + #if __GNUC__ >= 4 + #define AM7XXX_PUBLIC __attribute__ ((visibility ("default"))) + #define AM7XXX_LOCAL __attribute__ ((visibility ("hidden"))) + #else + #define AM7XXX_PUBLIC + #define AM7XXX_LOCAL + #endif +#endif + +static void log_message(am7xxx_context *ctx, + int level, + const char *function, + int line, + const char *fmt, + ...) __attribute__ ((format (printf, 5, 6))); + +#define fatal(...) log_message(NULL, AM7XXX_LOG_FATAL, __func__, __LINE__, __VA_ARGS__) +#define error(ctx, ...) log_message(ctx, AM7XXX_LOG_ERROR, __func__, __LINE__, __VA_ARGS__) +#define warning(ctx, ...) log_message(ctx, AM7XXX_LOG_WARNING, __func__, 0, __VA_ARGS__) +#define info(ctx, ...) log_message(ctx, AM7XXX_LOG_INFO, __func__, 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; + uint8_t configuration; /* The bConfigurationValue of the device */ + uint8_t interface_number; /* The bInterfaceNumber of the device */ + struct am7xxx_ops ops; +}; + +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, + .configuration = 2, + .interface_number = 0, + .ops = DEFAULT_OPS, + }, + { + .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, + .configuration = 2, + .interface_number = 0, + .ops = DEFAULT_OPS, + }, + { + .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, + .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, + }, +}; + +/* The header size on the wire is known to be always 24 bytes, regardless of + * the memory configuration enforced by different architectures or compilers + * for struct am7xxx_header + */ +#define AM7XXX_HEADER_WIRE_SIZE 24 + +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; + const struct am7xxx_usb_device_descriptor *desc; + am7xxx_device *next; +}; + +struct _am7xxx_context { + libusb_context *usb_context; + int log_level; + am7xxx_device *devices_list; +}; + +typedef enum { + AM7XXX_PACKET_TYPE_DEVINFO = 0x01, + 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 { + 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; +}; + +struct am7xxx_power_header { + uint32_t bit2; + uint32_t bit1; + uint32_t bit0; +}; + +struct am7xxx_zoom_header { + 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 + */ + +/* Direction of the communication from the host point of view */ +#define AM7XXX_DIRECTION_OUT 0 /* host -> device */ +#define AM7XXX_DIRECTION_IN 1 /* host <- device */ + +struct am7xxx_header { + uint32_t packet_type; + uint8_t direction; + 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; + struct am7xxx_zoom_header zoom; + } header_data; +}; + + +#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) + return; + + debug(ctx, "Info header:\n"); + debug(ctx, "\tnative_width: 0x%08x (%u)\n", d->native_width, d->native_width); + debug(ctx, "\tnative_height: 0x%08x (%u)\n", d->native_height, d->native_height); + debug(ctx, "\tunknown0: 0x%08x (%u)\n", d->unknown0, d->unknown0); + debug(ctx, "\tunknown1: 0x%08x (%u)\n", d->unknown1, d->unknown1); +} + +static void debug_dump_image_header(am7xxx_context *ctx, struct am7xxx_image_header *i) { - if (i == NULL) + if (ctx == NULL || i == NULL) return; - printf("Image header:\n"); - 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); + debug(ctx, "Image header:\n"); + debug(ctx, "\tformat: 0x%08x (%u)\n", i->format, i->format); + debug(ctx, "\twidth: 0x%08x (%u)\n", i->width, i->width); + debug(ctx, "\theight: 0x%08x (%u)\n", i->height, i->height); + debug(ctx, "\timage size: 0x%08x (%u)\n", i->image_size, i->image_size); } -static void dump_header(struct am7xxx_header *h) +static void debug_dump_power_header(am7xxx_context *ctx, struct am7xxx_power_header *p) { - if (h == NULL) + if (ctx == NULL || p == NULL) return; - printf("packet_type: 0x%08x (%u)\n", h->packet_type, h->packet_type); - printf("unknown0: 0x%02hhx (%hhu)\n", h->unknown0, h->unknown0); - printf("header_data_len: 0x%02hhx (%hhu)\n", h->header_data_len, h->header_data_len); - printf("unknown2: 0x%02hhx (%hhu)\n", h->unknown2, h->unknown2); - printf("unknown3: 0x%02hhx (%hhu)\n", h->unknown3, h->unknown3); + debug(ctx, "Power header:\n"); + debug(ctx, "\tbit2: 0x%08x (%u)\n", p->bit2, p->bit2); + debug(ctx, "\tbit1: 0x%08x (%u)\n", p->bit1, p->bit1); + debug(ctx, "\tbit0: 0x%08x (%u)\n", p->bit0, p->bit0); +} + +static void debug_dump_zoom_header(am7xxx_context *ctx, struct am7xxx_zoom_header *z) +{ + if (ctx == NULL || z == NULL) + return; + + debug(ctx, "Zoom header:\n"); + debug(ctx, "\tbit1: 0x%08x (%u)\n", z->bit1, z->bit1); + debug(ctx, "\tbit0: 0x%08x (%u)\n", z->bit0, z->bit0); +} + +static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h) +{ + if (ctx == NULL || h == NULL) + return; + + debug(ctx, "BEGIN\n"); + debug(ctx, "packet_type: 0x%08x (%u)\n", h->packet_type, h->packet_type); + debug(ctx, "direction: 0x%02hhx (%hhu) (%s)\n", h->direction, h->direction, + h->direction == AM7XXX_DIRECTION_IN ? "IN" : + h->direction == AM7XXX_DIRECTION_OUT ? "OUT" : + "UNKNOWN"); + debug(ctx, "header_data_len: 0x%02hhx (%hhu)\n", h->header_data_len, h->header_data_len); + debug(ctx, "unknown2: 0x%02hhx (%hhu)\n", h->unknown2, h->unknown2); + debug(ctx, "unknown3: 0x%02hhx (%hhu)\n", h->unknown3, h->unknown3); switch(h->packet_type) { + case AM7XXX_PACKET_TYPE_DEVINFO: + debug_dump_devinfo_header(ctx, &(h->header_data.devinfo)); + break; + case AM7XXX_PACKET_TYPE_IMAGE: - dump_image_header(&(h->header_data.image)); + debug_dump_image_header(ctx, &(h->header_data.image)); + break; + + case AM7XXX_PACKET_TYPE_POWER: + debug_dump_power_header(ctx, &(h->header_data.power)); + break; + + case AM7XXX_PACKET_TYPE_ZOOM: + debug_dump_zoom_header(ctx, &(h->header_data.zoom)); break; default: - printf("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; } - - fflush(stdout); + debug(ctx, "END\n\n"); } static inline unsigned int in_80chars(unsigned int i) @@ -69,45 +344,191 @@ static inline unsigned int in_80chars(unsigned int i) return ((i+1) % (80/3)); } -static void dump_buffer(uint8_t *buffer, unsigned int len) +static void trace_dump_buffer(am7xxx_context *ctx, const char *message, + uint8_t *buffer, unsigned int len) { unsigned int i; - if (buffer == NULL || len == 0) + if (ctx == NULL || buffer == NULL || len == 0) return; + trace(ctx, "\n"); + if (message) + trace(ctx, "%s\n", message); + for (i = 0; i < len; i++) { - printf("%02hhX%c", buffer[i], (in_80chars(i) && (i < len - 1)) ? ' ' : '\n'); + trace(ctx, "%02hhX%c", buffer[i], (in_80chars(i) && (i < len - 1)) ? ' ' : '\n'); } - fflush(stdout); + trace(ctx, "\n"); } +#else +static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h) +{ + (void)ctx; + (void)h; +} + +static void trace_dump_buffer(am7xxx_context *ctx, const char *message, + uint8_t *buffer, unsigned int len) +{ + (void)ctx; + (void)message; + (void)buffer; + (void)len; +} +#endif /* DEBUG */ -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; -#if DEBUG - dump_buffer(buffer, len); - printf("\n"); -#endif + ret = libusb_bulk_transfer(dev->usb_device, 0x81, buffer, len, &transferred, 0); + if (ret != 0 || (unsigned int)transferred != len) { + error(dev->ctx, "%s. Transferred: %d (expected %u)\n", + libusb_error_name(ret), transferred, len); + return ret; + } + + trace_dump_buffer(dev->ctx, "<-- received", buffer, len); + + 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; + + trace_dump_buffer(dev->ctx, "sending -->", buffer, len); + + ret = libusb_bulk_transfer(dev->usb_device, 0x1, buffer, len, &transferred, 0); if (ret != 0 || (unsigned int)transferred != len) { - fprintf(stderr, "Error: ret: %d\ttransferred: %d (expected %u)\n", - ret, transferred, len); + error(dev->ctx, "%s. Transferred: %d (expected %u)\n", + libusb_error_name(ret), transferred, len); return ret; } 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 dynamic allocations compared to 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; put_le32(h->packet_type, buffer_iterator); - put_8(h->unknown0, buffer_iterator); + put_8(h->direction, buffer_iterator); put_8(h->header_data_len, buffer_iterator); put_8(h->unknown2, buffer_iterator); put_8(h->unknown3, buffer_iterator); @@ -117,76 +538,794 @@ static void serialize_header(struct am7xxx_header *h, uint8_t *buffer) put_le32(h->header_data.data.field3, buffer_iterator); } -static int send_header(am7xxx_device dev, struct am7xxx_header *h) +static void unserialize_header(uint8_t *buffer, struct am7xxx_header *h) +{ + uint8_t **buffer_iterator = &buffer; + + h->packet_type = get_le32(buffer_iterator); + h->direction = 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; -#if DEBUG - dump_header(h); - printf("\n"); -#endif + ret = read_data(dev, dev->buffer, AM7XXX_HEADER_WIRE_SIZE); + if (ret < 0) + goto out; - buffer = calloc(AM7XXX_HEADER_WIRE_SIZE, 1); - if (buffer == NULL) { - perror("calloc buffer"); - return -ENOMEM; + unserialize_header(dev->buffer, h); + + if (h->direction == AM7XXX_DIRECTION_IN) { + ret = 0; + } else { + error(dev->ctx, + "Expected an AM7XXX_DIRECTION_IN packet, got one with direction = %d. Weird!\n", + h->direction); + ret = -EINVAL; } - serialize_header(h, buffer); - ret = send_data(dev, buffer, AM7XXX_HEADER_WIRE_SIZE); + debug_dump_header(dev->ctx, h); + +out: + return ret; +} + +static int send_header(am7xxx_device *dev, struct am7xxx_header *h) +{ + int ret; + + debug_dump_header(dev->ctx, h); + + /* For symmetry with read_header() we should check here for + * h->direction == AM7XXX_DIRECTION_OUT but we just ensure that in all + * the callers and save some cycles here. + */ + + 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"); + error(dev->ctx, "failed to send data\n"); - free(buffer); return ret; } -am7xxx_device am7xxx_init(void) +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 + * set up */ +static void log_message(am7xxx_context *ctx, + int level, + const char *function, + int line, + const char *fmt, + ...) { - am7xxx_device dev; + va_list ap; - libusb_init(NULL); - libusb_set_debug(NULL, 3); + if (level == AM7XXX_LOG_FATAL || (ctx && level <= ctx->log_level)) { + if (function) { + fprintf(stderr, "%s", function); + if (line) + fprintf(stderr, "[%d]", line); + fprintf(stderr, ": "); + } - dev = libusb_open_device_with_vid_pid(NULL, - AM7XXX_VENDOR_ID, - AM7XXX_PRODUCT_ID); - if (dev == NULL) { + va_start(ap, fmt); + vfprintf(stderr, fmt, ap); + va_end(ap); + } + + return; +} + +static am7xxx_device *add_new_device(am7xxx_context *ctx, + const struct am7xxx_usb_device_descriptor *desc) +{ + am7xxx_device **devices_list; + am7xxx_device *new_device; + + if (ctx == NULL) { + fatal("context must not be NULL!\n"); + return NULL; + } + + new_device = malloc(sizeof(*new_device)); + if (new_device == NULL) { + fatal("cannot allocate a new device (%s)\n", strerror(errno)); + return NULL; + } + memset(new_device, 0, sizeof(*new_device)); + + new_device->ctx = ctx; + new_device->desc = desc; + new_device->transfer_completed = 1; + + devices_list = &(ctx->devices_list); + + if (*devices_list == NULL) { + *devices_list = new_device; + } else { + am7xxx_device *prev = *devices_list; + while (prev->next) + prev = prev->next; + prev->next = new_device; + } + return new_device; +} + +static am7xxx_device *find_device(am7xxx_context *ctx, + unsigned int device_index) +{ + unsigned int i = 0; + am7xxx_device *current; + + if (ctx == NULL) { + fatal("context must not be NULL!\n"); + return NULL; + } + + current = ctx->devices_list; + while (current && i++ < device_index) + current = current->next; + + return current; +} + +static int open_device(am7xxx_context *ctx, + unsigned int device_index, + libusb_device *usb_dev, + am7xxx_device **dev) +{ + int ret; + int current_configuration; + + *dev = find_device(ctx, device_index); + if (*dev == NULL) { + ret = -ENODEV; + goto out; + } + + /* the usb device has already been opened */ + if ((*dev)->usb_device) { + debug(ctx, "(*dev)->usb_device already set\n"); + ret = 1; + goto out; + } + + ret = libusb_open(usb_dev, &((*dev)->usb_device)); + if (ret < 0) { + debug(ctx, "libusb_open failed: %s\n", libusb_error_name(ret)); + goto out; + } + + /* XXX, the device is now open, if any of the calls below fail we need + * to close it again before bailing out. + */ + + current_configuration = -1; + ret = libusb_get_configuration((*dev)->usb_device, + ¤t_configuration); + if (ret < 0) { + debug(ctx, "libusb_get_configuration failed: %s\n", + libusb_error_name(ret)); + goto out_libusb_close; + } + + if (current_configuration != (*dev)->desc->configuration) { + /* + * In principle, before setting a new configuration, kernel + * drivers should be detached from _all_ interfaces; for + * example calling something like the following "invented" + * function _before_ setting the new configuration: + * + * libusb_detach_all_kernel_drivers((*dev)->usb_device); + * + * However, in practice, this is not necessary for most + * devices as they have only one configuration. + * + * When a device only has one configuration: + * + * - if there was a kernel driver bound to the device, it + * had already set the configuration and the call below + * will be skipped; + * + * - if no kernel driver was bound to the device, the call + * below will suceed. + */ + ret = libusb_set_configuration((*dev)->usb_device, + (*dev)->desc->configuration); + if (ret < 0) { + debug(ctx, "libusb_set_configuration failed: %s\n", + libusb_error_name(ret)); + debug(ctx, "Cannot set configuration %hhu\n", + (*dev)->desc->configuration); + goto out_libusb_close; + } + } + + libusb_set_auto_detach_kernel_driver((*dev)->usb_device, 1); + + ret = libusb_claim_interface((*dev)->usb_device, + (*dev)->desc->interface_number); + if (ret < 0) { + debug(ctx, "libusb_claim_interface failed: %s\n", + libusb_error_name(ret)); + debug(ctx, "Cannot claim interface %hhu\n", + (*dev)->desc->interface_number); + goto out_libusb_close; + } + + /* Checking that the configuration has not changed, as suggested in + * http://libusb.sourceforge.net/api-1.0/caveats.html + */ + current_configuration = -1; + ret = libusb_get_configuration((*dev)->usb_device, + ¤t_configuration); + if (ret < 0) { + debug(ctx, "libusb_get_configuration after claim failed: %s\n", + libusb_error_name(ret)); + goto out_libusb_release_interface; + } + + if (current_configuration != (*dev)->desc->configuration) { + debug(ctx, "libusb configuration changed (expected: %hhu, current: %hhu\n", + (*dev)->desc->configuration, current_configuration); + ret = -EINVAL; + goto out_libusb_release_interface; + } +out: + return ret; + +out_libusb_release_interface: + libusb_release_interface((*dev)->usb_device, + (*dev)->desc->interface_number); +out_libusb_close: + libusb_close((*dev)->usb_device); + (*dev)->usb_device = NULL; + return ret; +} + +typedef enum { + SCAN_OP_BUILD_DEVLIST, + SCAN_OP_OPEN_DEVICE, +} scan_op; + +/** + * This is where the central logic of multi-device support is. + * + * When 'op' == SCAN_OP_BUILD_DEVLIST the parameters 'open_device_index' and + * 'dev' are ignored; the function returns 0 on success or a negative value + * on error. + * + * When 'op' == SCAN_OP_OPEN_DEVICE the function opens the supported USB + * device with index 'open_device_index' and returns the correspondent + * am7xxx_device in the 'dev' parameter; the function returns the value from + * open_device(), which is 0 on success, 1 if the device was already open or + * a negative value on error. + * + * NOTES: + * if scan_devices() fails when called with 'op' == SCAN_OP_BUILD_DEVLIST, + * the caller might want to call am7xxx_shutdown() in order to remove + * devices possibly added before the failure. + */ +static int scan_devices(am7xxx_context *ctx, scan_op op, + unsigned int open_device_index, am7xxx_device **dev) +{ + ssize_t num_devices; + libusb_device **list; + unsigned int current_index; + int i; + int ret; + + if (ctx == NULL) { + fatal("context must not be NULL!\n"); + return -EINVAL; + } + if (op == SCAN_OP_BUILD_DEVLIST && ctx->devices_list != NULL) { + error(ctx, "device scan done already? Abort!\n"); + return -EINVAL; + } + + num_devices = libusb_get_device_list(ctx->usb_context, &list); + if (num_devices < 0) { + ret = -ENODEV; + goto out; + } + + current_index = 0; + for (i = 0; i < num_devices; i++) { + struct libusb_device_descriptor desc; + unsigned int j; + + ret = libusb_get_device_descriptor(list[i], &desc); + if (ret < 0) + continue; + + for (j = 0; j < ARRAY_SIZE(supported_devices); j++) { + if (desc.idVendor == supported_devices[j].vendor_id && + desc.idProduct == supported_devices[j].product_id) { + + if (op == SCAN_OP_BUILD_DEVLIST) { + am7xxx_device *new_device; + info(ctx, "am7xxx device found, index: %d, name: %s\n", + current_index, + supported_devices[j].name); + new_device = add_new_device(ctx, &supported_devices[j]); + if (new_device == NULL) { + /* XXX, the caller may want + * to call am7xxx_shutdown() if + * we fail here, as we may have + * added some devices already + */ + debug(ctx, "Cannot create a new device\n"); + ret = -ENODEV; + goto out; + } + } else if (op == SCAN_OP_OPEN_DEVICE && + current_index == open_device_index) { + + ret = open_device(ctx, + open_device_index, + list[i], + dev); + if (ret < 0) + debug(ctx, "open_device failed\n"); + + /* exit the loop unconditionally after + * attempting to open the device + * requested by the user */ + goto out; + } + current_index++; + } + } + } + + /* if we made it up to here when op == SCAN_OP_OPEN_DEVICE, + * no devices to open had been found. */ + if (op == SCAN_OP_OPEN_DEVICE) { + error(ctx, "Cannot find any device to open\n"); + ret = -ENODEV; + goto out; + } + + /* everything went fine when building the device list */ + ret = 0; +out: + libusb_free_device_list(list, 1); + 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) +{ + int ret; + + *ctx = malloc(sizeof(**ctx)); + if (*ctx == NULL) { + fatal("cannot allocate the context (%s)\n", strerror(errno)); + ret = -ENOMEM; + goto out; + } + memset(*ctx, 0, sizeof(**ctx)); + + /* Set the highest log level during initialization */ + (*ctx)->log_level = AM7XXX_LOG_TRACE; + + ret = libusb_init(&((*ctx)->usb_context)); + if (ret < 0) { + error(*ctx, "libusb_init failed: %s\n", libusb_error_name(ret)); + goto out_free_context; + } + + libusb_set_debug((*ctx)->usb_context, LIBUSB_LOG_LEVEL_INFO); + + ret = scan_devices(*ctx, SCAN_OP_BUILD_DEVLIST , 0, NULL); + if (ret < 0) { + error(*ctx, "scan_devices() failed\n"); + am7xxx_shutdown(*ctx); + goto out; + } + + /* Set a quieter log level as default for normal operation */ + (*ctx)->log_level = AM7XXX_LOG_ERROR; + return 0; + +out_free_context: + free(*ctx); + *ctx = NULL; +out: + return ret; +} + +AM7XXX_PUBLIC void am7xxx_shutdown(am7xxx_context *ctx) +{ + am7xxx_device *current; + + if (ctx == NULL) { + fatal("context must not be NULL!\n"); + return; + } + + current = ctx->devices_list; + while (current) { + am7xxx_device *next = current->next; + am7xxx_close_device(current); + free(current->device_info); + free(current); + current = next; + } + + libusb_exit(ctx->usb_context); + free(ctx); + ctx = NULL; +} + +AM7XXX_PUBLIC void am7xxx_set_log_level(am7xxx_context *ctx, am7xxx_log_level log_level) +{ + ctx->log_level = log_level; +} + +AM7XXX_PUBLIC int am7xxx_open_device(am7xxx_context *ctx, am7xxx_device **dev, + unsigned int device_index) +{ + int ret; + + if (ctx == NULL) { + fatal("context must not be NULL!\n"); + return -EINVAL; + } + + ret = scan_devices(ctx, SCAN_OP_OPEN_DEVICE, device_index, dev); + if (ret < 0) { errno = ENODEV; - perror("libusb_open_device_with_vid_pid"); - goto out_libusb_exit; + goto out; + } else if (ret > 0) { + warning(ctx, "device %d already open\n", device_index); + errno = EBUSY; + ret = -EBUSY; + goto out; } - libusb_set_configuration(dev, 1); - libusb_claim_interface(dev, 0); + /* Philips/Sagemcom PicoPix projectors require that the DEVINFO packet + * is the first one to be sent to the device in order for it to + * successfully return the correct device information. + * + * So, if there is not a cached version of it (from a previous open), + * we ask for device info at open time, + */ + if ((*dev)->device_info == NULL) { + ret = am7xxx_get_device_info(*dev, NULL); + if (ret < 0) + error(ctx, "cannot get device info\n"); + } - return dev; +out: + return ret; +} -out_libusb_exit: - libusb_exit(NULL); - return NULL; +AM7XXX_PUBLIC int am7xxx_close_device(am7xxx_device *dev) +{ + if (dev == NULL) { + fatal("dev must not be NULL!\n"); + return -EINVAL; + } + if (dev->usb_device) { + wait_for_trasfer_completed(dev); + libusb_release_interface(dev->usb_device, dev->desc->interface_number); + libusb_close(dev->usb_device); + dev->usb_device = NULL; + } + return 0; } -void am7xxx_shutdown(am7xxx_device dev) +AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev, + am7xxx_device_info *device_info) { - if (dev) { - libusb_close(dev); - libusb_exit(NULL); + int ret; + struct am7xxx_header h; + + if (dev->device_info) { + memcpy(device_info, dev->device_info, sizeof(*device_info)); + return 0; + } + + ret = send_command(dev, AM7XXX_PACKET_TYPE_DEVINFO); + if (ret < 0) + return ret; + + memset(&h, 0, sizeof(h)); + ret = read_header(dev, &h); + if (ret < 0) + return ret; + + if (h.packet_type != AM7XXX_PACKET_TYPE_DEVINFO) { + error(dev->ctx, "expected packet type: %d, got %d instead!\n", + AM7XXX_PACKET_TYPE_DEVINFO, h.packet_type); + errno = ENOTSUP; + return -ENOTSUP; } + + dev->device_info = malloc(sizeof(*dev->device_info)); + if (dev->device_info == NULL) { + error(dev->ctx, "cannot allocate a device info (%s)\n", + strerror(errno)); + return -ENOMEM; + } + memset(dev->device_info, 0, sizeof(*dev->device_info)); + + dev->device_info->native_width = h.header_data.devinfo.native_width; + dev->device_info->native_height = h.header_data.devinfo.native_height; +#if 0 + /* No reason to expose these in the public API until we know what they mean */ + dev->device_info->unknown0 = h.header_data.devinfo.unknown0; + dev->device_info->unknown1 = h.header_data.devinfo.unknown1; +#endif + + return 0; } -int am7xxx_send_image(am7xxx_device dev, +AM7XXX_PUBLIC int am7xxx_calc_scaled_image_dimensions(am7xxx_device *dev, + unsigned int upscale, + unsigned int original_width, + unsigned int original_height, + unsigned int *scaled_width, + unsigned int *scaled_height) +{ + + am7xxx_device_info device_info; + float width_ratio; + float height_ratio; + int ret; + + ret = am7xxx_get_device_info(dev, &device_info); + if (ret < 0) { + error(dev->ctx, "cannot get device info\n"); + return ret; + } + + /* + * Check if we need to rescale; if the input image fits the native + * dimensions there is no need to, unless we want to upscale. + */ + if (!upscale && + original_width <= device_info.native_width && + original_height <= device_info.native_height ) { + debug(dev->ctx, "CASE 0, no rescaling, the original image fits already\n"); + *scaled_width = original_width; + *scaled_height = original_height; + return 0; + } + + /* Input dimensions relative to the device native dimensions */ + width_ratio = (float)original_width / device_info.native_width; + height_ratio = (float)original_height / device_info.native_height; + + if (width_ratio > height_ratio) { + /* + * The input is proportionally "wider" than the device viewport + * so its height needs to be adjusted + */ + debug(dev->ctx, "CASE 1, original image wider, adjust the scaled height\n"); + *scaled_width = device_info.native_width; + *scaled_height = (unsigned int)lroundf(original_height / width_ratio); + } else if (width_ratio < height_ratio) { + /* + * The input is proportionally "taller" than the device viewport + * so its width needs to be adjusted + */ + debug(dev->ctx, "CASE 2 original image taller, adjust the scaled width\n"); + *scaled_width = (unsigned int)lroundf(original_width / height_ratio); + *scaled_height = device_info.native_height; + } else { + debug(dev->ctx, "CASE 3, just rescale, same aspect ratio already\n"); + *scaled_width = device_info.native_width; + *scaled_height = device_info.native_height; + } + debug(dev->ctx, "scaled dimensions: %dx%d\n", *scaled_width, *scaled_height); + + return 0; +} + +AM7XXX_PUBLIC int am7xxx_send_image(am7xxx_device *dev, am7xxx_image_format format, unsigned int width, unsigned int height, uint8_t *image, - unsigned int size) + unsigned int image_size) { int ret; struct am7xxx_header h = { .packet_type = AM7XXX_PACKET_TYPE_IMAGE, - .unknown0 = 0x00, + .direction = AM7XXX_DIRECTION_OUT, .header_data_len = sizeof(struct am7xxx_image_header), .unknown2 = 0x3e, .unknown3 = 0x10, @@ -195,7 +1334,7 @@ int am7xxx_send_image(am7xxx_device dev, .format = format, .width = width, .height = height, - .image_size = size, + .image_size = image_size, }, }, }; @@ -204,8 +1343,68 @@ int am7xxx_send_image(am7xxx_device dev, if (ret < 0) return ret; - if (image == NULL || size == 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(dev, image, image_size); +} + +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 = { + .packet_type = AM7XXX_PACKET_TYPE_IMAGE, + .direction = AM7XXX_DIRECTION_OUT, + .header_data_len = sizeof(struct am7xxx_image_header), + .unknown2 = 0x3e, + .unknown3 = 0x10, + .header_data = { + .image = { + .format = format, + .width = width, + .height = height, + .image_size = image_size, + }, + }, + }; + + ret = send_header(dev, &h); + if (ret < 0) + return ret; + + 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_power_mode(am7xxx_device *dev, am7xxx_power_mode power) +{ + if (dev->desc->ops.set_power_mode == NULL) { + warning(dev->ctx, + "setting power mode is unsupported on this device\n"); + return 0; + } + + return dev->desc->ops.set_power_mode(dev, power); +} + +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 send_data(dev, image, size); + return dev->desc->ops.set_zoom_mode(dev, zoom); }