diff options
Diffstat (limited to 'src/jtag/ft2232.c')
| -rw-r--r-- | src/jtag/ft2232.c | 309 |
1 files changed, 281 insertions, 28 deletions
diff --git a/src/jtag/ft2232.c b/src/jtag/ft2232.c index 67167c78..096111bc 100644 --- a/src/jtag/ft2232.c +++ b/src/jtag/ft2232.c @@ -52,13 +52,13 @@ /* enable this to debug io latency */ -#if 0 +#if 1 #define _DEBUG_USB_IO_ #endif /* enable this to debug communication */ -#if 0 +#if 1 #define _DEBUG_USB_COMMS_ #endif @@ -470,7 +470,7 @@ void ft2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size int cur_byte = 0; int last_bit; - if ((!ir_scan && (cur_state != TAP_SD)) || (ir_scan && (cur_state != TAP_SI))) + if (!((!ir_scan && (cur_state == TAP_SD)) || (ir_scan && (cur_state == TAP_SI)))) { /* command "Clock Data to TMS/CS Pin (no Read)" */ BUFFER_ADD = 0x4b; @@ -491,8 +491,9 @@ void ft2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size } /* add command for complete bytes */ - if (num_bytes > 1) + while (num_bytes > 1) { + int thisrun_bytes; if (type == SCAN_IO) { /* Clock Data Bytes In and Out LSB First */ @@ -511,24 +512,206 @@ void ft2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size BUFFER_ADD = 0x28; //DEBUG("added TDI bytes (i %i)", num_bytes); } - BUFFER_ADD = (num_bytes-2) & 0xff; - BUFFER_ADD = ((num_bytes-2) >> 8) & 0xff; + thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1); + num_bytes -= thisrun_bytes; + BUFFER_ADD = (thisrun_bytes - 1) & 0xff; + BUFFER_ADD = ((thisrun_bytes - 1) >> 8) & 0xff; + if (type != SCAN_IN) + { + /* add complete bytes */ + while(thisrun_bytes-- > 0) + { + BUFFER_ADD = buffer[cur_byte]; + cur_byte++; + bits_left -= 8; + } + } + else /* (type == SCAN_IN) */ + { + bits_left -= 8 * (thisrun_bytes); + } } + + /* the most signifcant bit is scanned during TAP movement */ if (type != SCAN_IN) + last_bit = (buffer[cur_byte] >> (bits_left - 1)) & 0x1; + else + last_bit = 0; + + /* process remaining bits but the last one */ + if (bits_left > 1) { - /* add complete bytes */ - while(num_bytes-- > 1) + if (type == SCAN_IO) + { + /* Clock Data Bits In and Out LSB First */ + BUFFER_ADD = 0x3b; + //DEBUG("added TDI bits (io) %i", bits_left - 1); + } + else if (type == SCAN_OUT) { + /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */ + BUFFER_ADD = 0x1b; + //DEBUG("added TDI bits (o)"); + } + else if (type == SCAN_IN) + { + /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */ + BUFFER_ADD = 0x2a; + //DEBUG("added TDI bits (i %i)", bits_left - 1); + } + BUFFER_ADD = bits_left - 2; + if (type != SCAN_IN) BUFFER_ADD = buffer[cur_byte]; - cur_byte++; - bits_left -= 8; + } + + if ((ir_scan && (end_state == TAP_SI)) || + (!ir_scan && (end_state == TAP_SD))) + { + if (type == SCAN_IO) + { + /* Clock Data Bits In and Out LSB First */ + BUFFER_ADD = 0x3b; + //DEBUG("added TDI bits (io) %i", bits_left - 1); } + else if (type == SCAN_OUT) + { + /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */ + BUFFER_ADD = 0x1b; + //DEBUG("added TDI bits (o)"); + } + else if (type == SCAN_IN) + { + /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */ + BUFFER_ADD = 0x2a; + //DEBUG("added TDI bits (i %i)", bits_left - 1); + } + BUFFER_ADD = 0x0; + BUFFER_ADD = last_bit; } - if (type == SCAN_IN) + else + { + /* move from Shift-IR/DR to end state */ + if (type != SCAN_OUT) + { + /* Clock Data to TMS/CS Pin with Read */ + BUFFER_ADD = 0x6b; + //DEBUG("added TMS scan (read)"); + } + else + { + /* Clock Data to TMS/CS Pin (no Read) */ + BUFFER_ADD = 0x4b; + //DEBUG("added TMS scan (no read)"); + } + BUFFER_ADD = 0x6; + BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7); + cur_state = end_state; + } +} + +int ft2232_large_scan(scan_command_t *cmd, enum scan_type type, u8 *buffer, int scan_size) +{ + int num_bytes = (scan_size + 7) / 8; + int bits_left = scan_size; + int cur_byte = 0; + int last_bit; + u8 *receive_buffer = malloc(CEIL(scan_size, 8)); + u8 *receive_pointer = receive_buffer; + u32 bytes_written; + u32 bytes_read; + int retval; + int thisrun_read = 0; + + if (cmd->ir_scan) { - bits_left -= 8 * (num_bytes - 1); + ERROR("BUG: large IR scans are not supported"); + exit(-1); } + if (cur_state != TAP_SD) + { + /* command "Clock Data to TMS/CS Pin (no Read)" */ + BUFFER_ADD = 0x4b; + /* scan 7 bit */ + BUFFER_ADD = 0x6; + /* TMS data bits */ + BUFFER_ADD = TAP_MOVE(cur_state, TAP_SD); + cur_state = TAP_SD; + } + + if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK) + { + ERROR("couldn't write MPSSE commands to FT2232"); + exit(-1); + } + DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written); + ft2232_buffer_size = 0; + + /* add command for complete bytes */ + while (num_bytes > 1) + { + int thisrun_bytes; + + if (type == SCAN_IO) + { + /* Clock Data Bytes In and Out LSB First */ + BUFFER_ADD = 0x39; + //DEBUG("added TDI bytes (io %i)", num_bytes); + } + else if (type == SCAN_OUT) + { + /* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */ + BUFFER_ADD = 0x19; + //DEBUG("added TDI bytes (o)"); + } + else if (type == SCAN_IN) + { + /* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */ + BUFFER_ADD = 0x28; + //DEBUG("added TDI bytes (i %i)", num_bytes); + } + thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1); + thisrun_read = thisrun_bytes; + num_bytes -= thisrun_bytes; + BUFFER_ADD = (thisrun_bytes - 1) & 0xff; + BUFFER_ADD = ((thisrun_bytes - 1) >> 8) & 0xff; + if (type != SCAN_IN) + { + /* add complete bytes */ + while(thisrun_bytes-- > 0) + { + BUFFER_ADD = buffer[cur_byte]; + cur_byte++; + bits_left -= 8; + } + } + else /* (type == SCAN_IN) */ + { + bits_left -= 8 * (thisrun_bytes); + } + + if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK) + { + ERROR("couldn't write MPSSE commands to FT2232"); + exit(-1); + } + DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written); + ft2232_buffer_size = 0; + + if (type != SCAN_OUT) + { + if ((retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read)) != ERROR_OK) + { + ERROR("couldn't read from FT2232"); + exit(-1); + } + DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read); + receive_pointer += bytes_read; + } + } + + thisrun_read = 0; + /* the most signifcant bit is scanned during TAP movement */ if (type != SCAN_IN) last_bit = (buffer[cur_byte] >> (bits_left - 1)) & 0x1; @@ -559,30 +742,83 @@ void ft2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size BUFFER_ADD = bits_left - 2; if (type != SCAN_IN) BUFFER_ADD = buffer[cur_byte]; + + if (type != SCAN_OUT) + thisrun_read += 2; } - /* move from Shift-IR/DR to end state */ - if (type != SCAN_OUT) + if (end_state == TAP_SD) { - /* Clock Data to TMS/CS Pin with Read */ - BUFFER_ADD = 0x6b; - //DEBUG("added TMS scan (read)"); + if (type == SCAN_IO) + { + /* Clock Data Bits In and Out LSB First */ + BUFFER_ADD = 0x3b; + //DEBUG("added TDI bits (io) %i", bits_left - 1); + } + else if (type == SCAN_OUT) + { + /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */ + BUFFER_ADD = 0x1b; + //DEBUG("added TDI bits (o)"); + } + else if (type == SCAN_IN) + { + /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */ + BUFFER_ADD = 0x2a; + //DEBUG("added TDI bits (i %i)", bits_left - 1); + } + BUFFER_ADD = 0x0; + BUFFER_ADD = last_bit; } else { - /* Clock Data to TMS/CS Pin (no Read) */ - BUFFER_ADD = 0x4b; - //DEBUG("added TMS scan (no read)"); + /* move from Shift-IR/DR to end state */ + if (type != SCAN_OUT) + { + /* Clock Data to TMS/CS Pin with Read */ + BUFFER_ADD = 0x6b; + //DEBUG("added TMS scan (read)"); + } + else + { + /* Clock Data to TMS/CS Pin (no Read) */ + BUFFER_ADD = 0x4b; + //DEBUG("added TMS scan (no read)"); + } + BUFFER_ADD = 0x6; + BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7); + cur_state = end_state; } - BUFFER_ADD = 0x6; - BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7); - cur_state = end_state; - + + if (type != SCAN_OUT) + thisrun_read += 1; + + if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK) + { + ERROR("couldn't write MPSSE commands to FT2232"); + exit(-1); + } + DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written); + ft2232_buffer_size = 0; + + if (type != SCAN_OUT) + { + if ((retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read)) != ERROR_OK) + { + ERROR("couldn't read from FT2232"); + exit(-1); + } + DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read); + receive_pointer += bytes_read; + } + + return ERROR_OK; } int ft2232_predict_scan_out(int scan_size, enum scan_type type) { int predicted_size = 3; + int num_bytes = (scan_size - 1) / 8; if (cur_state != TAP_SD) predicted_size += 3; @@ -590,14 +826,14 @@ int ft2232_predict_scan_out(int scan_size, enum scan_type type) if (type == SCAN_IN) /* only from device to host */ { /* complete bytes */ - predicted_size += (CEIL(scan_size, 8) > 1) ? 3 : 0; + predicted_size += (CEIL(num_bytes, 65536)) * 3; /* remaining bits - 1 (up to 7) */ predicted_size += ((scan_size - 1) % 8) ? 2 : 0; } else /* host to device, or bidirectional */ { /* complete bytes */ - predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) + 3 - 1) : 0; + predicted_size += num_bytes + (CEIL(num_bytes, 65536)) * 3; /* remaining bits -1 (up to 7) */ predicted_size += ((scan_size - 1) % 8) ? 3 : 0; } @@ -910,9 +1146,26 @@ int ft2232_execute_queue() scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer); type = jtag_scan_type(cmd->cmd.scan); predicted_size = ft2232_predict_scan_out(scan_size, type); - if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE) + if ((predicted_size + 1) > FT2232_BUFFER_SIZE) + { + DEBUG("oversized ft2232 scan (predicted_size > FT2232_BUFFER_SIZE)"); + /* unsent commands before this */ + if (first_unsent != cmd) + ft2232_send_and_recv(first_unsent, cmd); + + /* current command */ + if (cmd->cmd.scan->end_state != -1) + ft2232_end_state(cmd->cmd.scan->end_state); + ft2232_large_scan(cmd->cmd.scan, type, buffer, scan_size); + require_send = 0; + first_unsent = cmd->next; + if (buffer) + free(buffer); + break; + } + else if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE) { - DEBUG("ftd2xx buffer size reached, sending queued commands (first_unsent: %x, cmd: %x)", first_unsent, cmd); + DEBUG("ft2232 buffer size reached, sending queued commands (first_unsent: %x, cmd: %x)", first_unsent, cmd); ft2232_send_and_recv(first_unsent, cmd); require_send = 0; first_unsent = cmd; |