/* * displaylink userspace controller demo 0.0.1 * written 2008/09 by floe at butterbrot.org * in cooperation with chrisly at platon42.de * this code is released as public domain. * * this is so experimental that the warranty shot itself. * so don't expect any. * * build with "g++ -ggdb -Wall -o displaylink displaylink.c -lusb" * */ #include #include #include #include #include #include #include #include /******************* ENCRYPTION STUFF **********************/ unsigned char nullkey1[] = { 0x57, 0xCD, 0xDC, 0xA7, 0x1C, 0x88, 0x5E, 0x15, 0x60, 0xFE, 0xC6, 0x97, 0x16, 0x3D, 0x47, 0xF2 }; unsigned char nullkey2[] = { 0x47, 0x3D, 0x16, 0x97, 0xC6, 0xFE, 0x60, 0x15, 0x5E, 0x88, 0x1C, 0xA7, 0xDC, 0xB7, 0x6F, 0xF2 }; unsigned char nullkey3[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0x18,0xF0 }; uint8_t keybuffer[0x11000]; uint16_t ofsbuffer[0x1000]; // x^12+x^11+x^3+x^2+x+1 = 0001 1000 0000 1111 = 0x180F int dl_crc12( unsigned char* data, int len) { int rem = 0; for (int i = 0; i < len; i++) { for (int j = 0; j < 8; j++) { rem = (rem << 1) | ((data[i] >> j) & 0x01); if (rem & 0x1000) rem = rem ^ 0x180F; } } return rem; } void dl_generate_key( uint8_t key[0x11000], uint16_t map[0x1000] ) { int coeffs[0x20]; int count = 0; // loop1: for (int i = 0; i < 0x20; i++) { int tmp = 1 << i; if (!(tmp & 0x0829)) continue; coeffs[count] = i; count++; } int val = 0x01; // loop2: for (int i = 0; i < 0x11000; i++) { key[i] = val; if (i < 0x1000) map[val] = i; // loop3: for ( int j = 8; j > 0; j--) { int res = 0; // loop4: for (int k = 0; k < count; k++) { int coeff = coeffs[k]; coeff = val >> coeff; res = res ^ coeff; } res = res & 1; res = res ^ (2*val); val = res & 0xFFF; } } } /******************* INITIALIZATION STUFF *****************/ uint8_t dl_peek( int addr, usb_dev_handle* handle, int timeout = 1000 ) { uint8_t buf[1]; usb_control_msg( handle, 0xC0, 0x04, 0x00, addr, (char*)buf, 1, timeout ); return buf[0]; } void dl_poke( int addr, uint8_t value, usb_dev_handle* handle, int timeout = 1000 ) { usb_control_msg( handle, 0x40, 0x03, 0x00, addr, (char*)&value, 1, timeout ); } int dl_poll( usb_dev_handle* handle, int timeout = 1000 ) { uint8_t buf[4]; usb_control_msg( handle, 0xC0, 0x06, 0x00, 0x00, (char*)buf, 4, timeout ); return (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; } void dl_set_key( uint8_t key[16], usb_dev_handle* handle, int timeout = 1000 ) { usb_control_msg( handle, 0x40, 0x12, 0x00, 0x00, (char*)key, 16, timeout ); } void dl_blink( usb_dev_handle* handle, int timeout = 1000 ) { usb_control_msg( handle, 0x40, 0x14, 0x00, 0x00, NULL, 0, timeout ); } void dl_get_edid( uint8_t edid[128], usb_dev_handle* handle, int timeout = 1000 ) { uint8_t buf[64]; int offset = 0; usb_control_msg( handle, 0xC0, 0x02, offset<<8, 0xA1, (char*)buf, 64, timeout ); memcpy( edid+offset, buf+1, 63 ); offset += 63; usb_control_msg( handle, 0xC0, 0x02, offset<<8, 0xA1, (char*)buf, 64, timeout ); memcpy( edid+offset, buf+1, 63 ); offset += 63; usb_control_msg( handle, 0xC0, 0x02, offset<<8, 0xA1, (char*)buf, 3, timeout ); memcpy( edid+offset, buf+1, 2 ); } /******************* COMMAND BUFFER ***********************/ typedef struct { uint8_t* buffer; int pos, size; } dl_cmdstream; inline void create( dl_cmdstream* cs, int size ) { cs->buffer = (uint8_t*)malloc( size ); cs->size = size; cs->pos = 0; } inline void destroy( dl_cmdstream* cs ) { free( cs->buffer ); cs->size = 0; } inline void send( dl_cmdstream* cs, usb_dev_handle* handle, int ep = 1, int timeout = 1000 ) { usb_bulk_write( handle, ep, (char*)cs->buffer, cs->pos, timeout ); cs->pos = 0; } inline void insertb( dl_cmdstream* cs, uint8_t val ) { cs->buffer[cs->pos++] = val; } inline void insertw( dl_cmdstream* cs, uint16_t val ) { insertb( cs, (val >> 8) & 0xFF ); insertb( cs, (val ) & 0xFF ); } inline void inserta( dl_cmdstream* cs, uint32_t address ) { insertb( cs, (address >> 16) & 0xFF ); insertb( cs, (address >> 8) & 0xFF ); insertb( cs, (address ) & 0xFF ); } inline void insertd( dl_cmdstream* cs, uint32_t val ) { insertb( cs, (val >> 24) & 0xFF ); insertb( cs, (val >> 16) & 0xFF ); insertb( cs, (val >> 8) & 0xFF ); insertb( cs, (val ) & 0xFF ); } inline void insert( dl_cmdstream* cs, int size, uint8_t* buf ) { memcpy( cs->buffer+cs->pos, buf, size ); cs->pos += size; } /******************* COMMANDS *****************************/ #define DL_SOC 0xAF // start-of-command token /******************* MISC COMMANDS ************************/ void dl_unknown_command( dl_cmdstream* cs ) { insertb( cs, DL_SOC ); insertb( cs, 0x40 ); insertb( cs, 0x0B ); } void dl_sync_command( dl_cmdstream* cs ) { insertb( cs, DL_SOC ); insertb( cs, 0xA0 ); } void dl_decomp_table_command( dl_cmdstream* cs, int size, uint8_t* buf ) { if ((size % 9) != 0) return; int count = size / 9; insertb( cs, DL_SOC ); insertb( cs, 0xE0 ); insertd( cs, 0x263871CD ); // magic number insertd( cs, count ); // count of 9-byte chunks insert( cs, size, buf ); // count * 9 bytes dl_sync_command( cs ); } /******************* REGISTER COMMANDS ********************/ #define DL_REG_COLORDEPTH 0x00 // 0 = 16 bit, 1 = 24 bit // 0x01 - 0x0E unknown #define DL_REG_XRES_MSB 0x0F #define DL_REG_XRES_LSB 0x10 // 0x11 - 0x16 unknown #define DL_REG_YRES_MSB 0x17 #define DL_REG_YRES_LSB 0x18 // 0x19 - 0x1C unknown // 0x1D - 0x1E unused #define DL_REG_BLANK_SCREEN 0x1F // 0 = normal operation, 1 = blank screen // 0x20 - 0xFE unused #define DL_REG_SYNC 0xFF // 0 = hold register updates, 0xFF = resume // The unknown registers very likely contain pixel clock, sync polarity etc. // While the mapping hasn't been found yet, some default register sets for // standard resolutions are given below. uint8_t dl_register_init_640[] = { 0x00, 0x99, 0x30, 0x26, 0x94, 0x60, 0xa9, 0xce, 0x60, 0x07, 0xb3, 0x0f, 0x79, 0xff, 0xff, 0x02, 0x80, 0x83, 0xbc, 0xff, 0xfc, 0xff, 0xff, 0x01, 0xe0, 0x01, 0x02, 0xab, 0x13 }; uint8_t dl_register_init_800[] = { 0x00, 0x20, 0x3c, 0x7a, 0xc9, 0x93, 0x60, 0xc8, 0xc7, 0x70, 0x53, 0xff, 0xff, 0x21, 0x27, 0x03, 0x20, 0x91, 0x8f, 0xff, 0xff, 0xff, 0xf2, 0x02, 0x58, 0x01, 0x02, 0x40, 0x1f }; uint8_t dl_register_init_1024[] = { 0x00, 0x36, 0x18, 0xd5, 0x10, 0x60, 0xa9, 0x7b, 0x33, 0xa1, 0x2b, 0x27, 0x32, 0xff, 0xff, 0x04, 0x00, 0xd9, 0x9a, 0xff, 0xca, 0xff, 0xff, 0x03, 0x00, 0x04, 0x03, 0xc8, 0x32 }; uint8_t dl_register_init_1280[] = { 0x00, 0x98, 0xf8, 0x0d, 0x57, 0x2a, 0x55, 0x4d, 0x54, 0xca, 0x0d, 0xff, 0xff, 0x94, 0x43, 0x05, 0x00, 0x9a, 0xa8, 0xff, 0xff, 0xff, 0xf9, 0x04, 0x00, 0x04, 0x02, 0x60, 0x54 }; uint8_t dl_register_init_U70[] = { 0x00, 0x20, 0x3c, 0x7a, 0xc9, 0xf2, 0x6c, 0x48, 0xf9, 0x70, 0x53, 0xff, 0xff, 0x21, 0x27, 0x03, 0x20, 0x91, 0xf3, 0xff, 0xff, 0xff, 0xf9, 0x01, 0xe0, 0x01, 0x02, 0xc8, 0x19 }; /*24-bit: 640x480: 01 99 30 26 94 60 a9 ce 60 07 b3 0f 79 ff ff 02 80 83 bc ff fc ff ff 01 e0 01 02 ab 13 1280x..: 01 98 f8 0d 57 2a 55 4d 54 ca 0d ff ff 94 43 05 00 9a a8 ff ff ff f9 04 00 04 02 60 54 */ void dl_set_register( dl_cmdstream* cs, uint8_t reg, uint8_t val ) { insertb( cs, DL_SOC ); insertb( cs, 0x20 ); insertb( cs, reg ); insertb( cs, val ); } void dl_set_registers( dl_cmdstream* cs, uint8_t values[0x1D] ) { dl_set_register( cs, DL_REG_SYNC, 0x00 ); for (int i = 0; i < 0x1D; i++) dl_set_register( cs, i, values[i] ); dl_set_register( cs, DL_REG_SYNC, 0xFF ); } /****************** ADDRESS REGISTERS *********************/ #define DL_ADDR_FB16_START 0x20 // 16-bit mode, color MSBs, RGB 565 #define DL_ADDR_FB16_STRIDE 0x23 #define DL_ADDR_FB8_START 0x26 // additional 8 bit for 24-bit mode, color LSBs, RGB 323? #define DL_ADDR_FB8_STRIDE 0x29 void dl_set_address( dl_cmdstream* cs, uint8_t reg, int address ) { dl_set_register( cs, reg+0, (address >> 16) & 0xFF ); dl_set_register( cs, reg+1, (address >> 8) & 0xFF ); dl_set_register( cs, reg+2, (address ) & 0xFF ); } void dl_set_offsets( dl_cmdstream* cs, int start16, int stride16, int start8, int stride8 ) { dl_set_register( cs, DL_REG_SYNC, 0x00 ); dl_set_address( cs, DL_ADDR_FB16_START, start16 ); dl_set_address( cs, DL_ADDR_FB16_STRIDE, stride16 ); dl_set_address( cs, DL_ADDR_FB8_START, start8 ); dl_set_address( cs, DL_ADDR_FB8_STRIDE, stride8 ); dl_set_register( cs, DL_REG_SYNC, 0xFF ); } /******************* GRAPHICS COMMANDS ********************/ #define DL_GFX_BASE 0x60 // base graphics command #define DL_GFX_WORD 0x08 // word-mode flag #define DL_GFX_COMP 0x10 // compressed-mode flag #define DL_GFX_WRITE (DL_GFX_BASE | 0x00) // write memory #define DL_GFX_RLE (DL_GFX_BASE | 0x01) // write RLE-encoded data #define DL_GFX_COPY (DL_GFX_BASE | 0x02) // internal copy void dl_gfx_command( dl_cmdstream* cs, uint8_t cmd, int addr, uint8_t count ) { insertb( cs, DL_SOC ); insertb( cs, cmd ); inserta( cs, addr ); insertb( cs, count ); } void dl_gfx_write( dl_cmdstream* cs, int addr, uint8_t count, uint8_t* data ) { dl_gfx_command( cs, DL_GFX_WRITE | DL_GFX_WORD, addr, count ); int pcount = (count == 0) ? 256 : count; insert( cs, pcount*2, data ); } typedef struct { uint8_t count; uint16_t value; } rle_word; void dl_gfx_rle( dl_cmdstream* cs, int addr, uint8_t count, rle_word* rs ) { dl_gfx_command( cs, DL_GFX_RLE | DL_GFX_WORD, addr, count ); int pcount = (count == 0) ? 256 : count; int i = 0; rle_word* cur = rs; while (i < pcount) { insertb( cs, cur->count ); insertw( cs, cur->value ); i += (cur->count == 0) ? 256: cur->count; cur++; } } void dl_gfx_copy( dl_cmdstream* cs, int src_addr, int dst_addr, uint8_t count ) { dl_gfx_command( cs, DL_GFX_COPY | DL_GFX_WORD, dst_addr, count ); inserta( cs, src_addr ); } /******************* INITIALIZATION SEQUENCE **************/ static uint8_t dl_decomp_table[] = { 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x60, 0x01, 0x00, 0x00, 0x00, 0x61, 0x00, 0x00, 0x00, 0x01, 0x23, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x60, 0x05, 0x00, 0x00, 0x00, 0x61, 0x00, 0x00, 0x00, 0x01, 0x67, 0x00, 0x01, 0x00, 0x01, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x01, 0x89, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x61, 0xab, 0x00, 0x00, 0x00, 0x61, 0x00, 0x00, 0x00, 0x01, 0xcd, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x60, 0x0f, 0x00, 0x00, 0x00, 0x61, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x01, 0x22, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00, 0x02, 0x33, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x44, 0x00, 0x02, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x44, 0x00, 0x02, 0x00, 0x02, 0x00, 0x00, 0x01, 0x00, 0x05, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x67, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x01, 0x00, 0x05, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x67, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x5b, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x01, 0xc8, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00, 0x02, 0x5b, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x5b, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x9a, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x33, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00, 0x01, 0x01, 0x2b, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00, 0x02, 0xcc, 0x00, 0x02, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0xdd, 0x00, 0x04, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0xef, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x23, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x01, 0x01, 0xc4, 0x00, 0x00, 0x01, 0x03, 0x00, 0x29, 0x01, 0x00, 0x05, 0x00, 0x00, 0x00, 0x03, 0x00, 0xb7, 0x01, 0x00, 0x06, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x78, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x99, 0x00, 0x04, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0xaa, 0x00, 0x08, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0xbc, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0xde, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0xf0, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0x12, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0x34, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0x56, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0x78, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0x9a, 0x00, 0x00, 0x00, 0x04, 0x00, 0xd7, 0x01, 0x00, 0x00, 0x00, 0x09, 0x01, 0x00, 0x00, 0x00, 0x01, 0x01, 0x22, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x02, 0x04, 0xbb, 0x00, 0x00, 0x03, 0x04, 0x00, 0x00, 0x00, 0x04, 0xcc, 0x00, 0x08, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0xdd, 0x00, 0x10, 0x00, 0x04, 0x00, 0x20, 0x01, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, 0xf0, 0x00, 0x00, 0x00, 0x05, 0xff, 0xe0, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x05, 0x23, 0x00, 0x00, 0x00, 0x05, 0x08, 0x00, 0x01, 0x00, 0x00, 0x08, 0x20, 0x01, 0x00, 0x00, 0x00, 0x00, 0x05, 0x45, 0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x21, 0x01, 0x00, 0x00, 0x00, 0x00, 0x05, 0x67, 0x00, 0x00, 0x00, 0x05, 0xf8, 0x00, 0x01, 0x00, 0x00, 0xf7, 0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x05, 0x89, 0x00, 0x00, 0x00, 0x05, 0xff, 0xff, 0x01, 0x00, 0x00, 0xff, 0xdf, 0x01, 0x00, 0x00, 0x00, 0x00, 0x05, 0xab, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x01, 0x01, 0xcc, 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x02, 0x05, 0xcc, 0x00, 0x00, 0x03, 0x05, 0x00, 0x12, 0x01, 0x00, 0x00, 0x00, 0x32, 0x01, 0x00, 0x00, 0xce, 0x01, 0x00, 0x00, 0x00, 0xae, 0x01, 0x00, 0x00, 0x00, 0x00, 0x05, 0xde, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x05, 0xff, 0x00, 0x10, 0x00, 0x05, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x20, 0x00, 0x06, 0x08, 0x41, 0x01, 0x00, 0x00, 0x08, 0x21, 0x01, 0x00, 0x08, 0x61, 0x00, 0x06, 0x12, 0x00, 0x00, 0x00, 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0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0x7f }; void dl_init( usb_dev_handle* handle ) { uint8_t edid[128]; uint8_t peek; dl_cmdstream cs; create( &cs, 10*1024 ); printf("dl_init(): starting DisplayLink initialization..\n"); // windows driver does this about once a second: // f0005000 seems to be default response // f0002000 sometimes seen when device is messed up int poll = dl_poll( handle ); printf( " dl_poll() = 0x%08x\n", poll ); // always seems to return 0x82 peek = dl_peek( 0xC484, handle ); printf( " dl_peek(0xC484) = 0x%02hhx\n", peek ); // original driver does this, but no visible effect printf( " dl_poke(0xC41F,0x01)\n" ); dl_poke( 0xC41F, 0x01, handle ); dl_get_edid( edid, handle ); printf( " EDID data:\n" ); for (int i = 0; i < 8; i++) { printf( " " ); for (int j = 0; j < 16; j++) printf( "%02hhx ", edid[i*16+j] ); printf( "\n" ); } printf( " setting decryption null-key..\n" ); dl_set_key( nullkey1, handle ); // original driver does this, but no visible effect printf( " dl_poke(0xC40B,0x00)\n" ); dl_poke( 0xC40B, 0x00, handle ); printf( " sending decompressor table (%d bytes)..\n", sizeof(dl_decomp_table) ); dl_decomp_table_command( &cs, sizeof(dl_decomp_table), dl_decomp_table ); send( &cs, handle ); printf("dl_init(): initialization done.\n\n"); destroy( &cs ); } void dl_dumpmem( usb_dev_handle* handle, char* f ) { FILE* dump = fopen(f,"w+"); for (int base = 0; base < 0x100; base++) { fprintf(dump," register space @ 0x%04x:\n", base<<8 ); for (int i = 0; i < 256; i++ ) { if (i % 16 == 0) fprintf(dump," "); uint8_t peek = dl_peek( (base<<8)+i, handle ); fprintf(dump,"%02hhx ",peek); if (i % 16 == 15) fprintf(dump,"\n"); } } fclose(dump); } /******************* HELPER FUNCTIONS *********************/ usb_dev_handle* usb_get_device_handle( int vendor, int product, int interface = 0 ) { usb_init(); usb_find_busses(); usb_find_devices(); struct usb_bus* busses = usb_get_busses(); for ( struct usb_bus* bus = busses; bus; bus = bus->next ) { for ( struct usb_device* dev = bus->devices; dev; dev = dev->next ) { if ((dev->descriptor.idVendor == vendor) && (dev->descriptor.idProduct == product)) { usb_dev_handle* handle = usb_open(dev); if (!handle) return 0; if (usb_claim_interface(handle,0) < 0) return 0; return handle; } } } return 0; } void rgb24_to_rgb16( uint8_t* rgb24, uint8_t* rgb16, int count ) { for (int i = 0; i < count; i++) { uint8_t r = rgb24[i*3+0]; uint8_t g = rgb24[i*3+1]; uint8_t b = rgb24[i*3+2]; rgb16[i*2+0] = (r & 0xF8) | ((g & 0xE0) >> 5); rgb16[i*2+1] = ((g & 0x1C) << 3) | ((b & 0xF8) >> 3); } } void read_rgb24( const char* filename, uint8_t* rgb24, int count ) { int f = open(filename,O_RDONLY); read( f, rgb24, count*3 ); close(f); } uint8_t* read_rgb16( const char* filename, int count ) { uint8_t* rgb16 = (uint8_t*)malloc(count*2); uint8_t* rgb24 = (uint8_t*)malloc(count*3); read_rgb24(filename,rgb24,count); rgb24_to_rgb16(rgb24,rgb16,count); free( rgb24 ); return rgb16; } /******************* MAIN ROUTINE *************************/ int main(int argc, char* argv[] ) { printf("\ndisplaylink userspace controller demo 0.0.1\n\n"); printf("written 2008/09 by floe at butterbrot.org\n"); printf("in cooperation with chrisly at platon42.de\n"); printf("this code is released as public domain.\n\n"); printf("this is so experimental that the warranty shot itself.\n"); printf("so don't expect any.\n\n"); printf("(note: you can pass a 640x960 pixel RGB raw image file as parameter)\n\n"); // #define XRES 640 #define XRES 800 #define YRES 480 dl_cmdstream cs; create( &cs, 1024*1024 ); // usb_dev_handle* handle = usb_get_device_handle( 0x17E9, 0x01AE ); usb_dev_handle* handle = usb_get_device_handle( 0x17E9, 0x0103 ); if (!handle) { printf("!handle\n\n"); return 1; } // startup control messages & firmware dl_init( handle ); // default register set & offsets printf("setting default registers for 800x480..\n"); dl_set_registers( &cs, dl_register_init_U70 ); dl_set_offsets( &cs, 0x000000, 0x000A00, 0x555555, 0x000500 ); /*dl_set_offsets( &cs, 0x000000, 0x000A00, 0x555555, 0x000500 ); dl_unknown_command( &cs ); dl_set_offsets( &cs, 0x000000, 0x000A00, 0x555555, 0x000500 );*/ dl_set_register( &cs, DL_REG_BLANK_SCREEN, 0x00 ); // enable output dl_set_register( &cs, DL_REG_SYNC, 0xFF ); dl_sync_command( &cs ); send( &cs, handle ); sleep(1); //dl_dumpmem(handle,"dump1.log"); // fill with a bunch of red printf("filling screen with red gradient..\n"); rle_word red = { 0x00, 0x0000 }; for (int i = 0; i < YRES; i++) { dl_gfx_rle( &cs, i*XRES*2, 0x00, &red ); dl_gfx_rle( &cs, i*XRES*2+512, 0x00, &red ); dl_gfx_rle( &cs, i*XRES*2+1024, 0x00, &red ); red.value = (i/15) << 11; } dl_sync_command( &cs ); send( &cs, handle ); sleep(1); // grr. I'm pretty sure that I'm right about the stride register, // but I can't get it to have any effect... /*dl_set_register( &cs, DL_REG_SYNC, 0x00 ); dl_set_address( &cs, DL_ADDR_FB16_STRIDE, X*2 ); dl_set_address( &cs, DL_ADDR_FB8_STRIDE, X ); dl_set_register( &cs, DL_REG_SYNC, 0xFF ); dl_sync_command( &cs ); send( &cs, handle );*/ if (argc >= 2) { // fill with an image printf("filling screen with an image..\n"); // #define X 640 #define X 800 #define Y 960 uint8_t* image = read_rgb16(argv[1],X*Y); for (int i = 0; i < (X*Y)/256; i++) { dl_gfx_write( &cs, i*256*2, 0x00, image+(i*256*2) ); if ((i % 100) == 0) { dl_sync_command( &cs ); send( &cs, handle ); } } dl_sync_command( &cs ); send( &cs, handle ); sleep(1); } // some vertical scrolling printf("doing vertical scrolling (why doesn't horizontal work?)..\n"); for (int i = 0; i < YRES; i++) { dl_set_register( &cs, DL_REG_SYNC, 0x00 ); dl_set_address( &cs, DL_ADDR_FB16_START, i*XRES*2 ); dl_set_register( &cs, DL_REG_SYNC, 0xFF ); dl_sync_command( &cs ); send( &cs, handle ); usleep(5000); } //dl_dumpmem(handle,"dump2.log"); sleep(1); // some memcopy printf("doing bitblt..\n\n"); dl_set_offsets( &cs, 0x000000, 0x000A00, 0x555555, 0x000500 ); for (int i = 0; i < 100; i++) { dl_gfx_copy( &cs, 0x500*(280+i)+320*2, 0x500*(380+i)+420*2, 100 ); } dl_sync_command( &cs ); send( &cs, handle ); printf("goodbye.\n\n"); usb_close( handle ); destroy( &cs ); }