// SPDX-License-Identifier: GPL-2.0+ /* * comedi/drivers/ni_usb6501.c * Comedi driver for National Instruments USB-6501 * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 2014 Luca Ellero <[email protected]> */ /* * Driver: ni_usb6501 * Description: National Instruments USB-6501 module * Devices: [National Instruments] USB-6501 (ni_usb6501) * Author: Luca Ellero <[email protected]> * Updated: 8 Sep 2014 * Status: works * * * Configuration Options: * none */ /* * NI-6501 - USB PROTOCOL DESCRIPTION * * Every command is composed by two USB packets: * - request (out) * - response (in) * * Every packet is at least 12 bytes long, here is the meaning of * every field (all values are hex): * * byte 0 is always 00 * byte 1 is always 01 * byte 2 is always 00 * byte 3 is the total packet length * * byte 4 is always 00 * byte 5 is the total packet length - 4 * byte 6 is always 01 * byte 7 is the command * * byte 8 is 02 (request) or 00 (response) * byte 9 is 00 (response) or 10 (port request) or 20 (counter request) * byte 10 is always 00 * byte 11 is 00 (request) or 02 (response) * * PORT PACKETS * * CMD: 0xE READ_PORT * REQ: 00 01 00 10 00 0C 01 0E 02 10 00 00 00 03 <PORT> 00 * RES: 00 01 00 10 00 0C 01 00 00 00 00 02 00 03 <BMAP> 00 * * CMD: 0xF WRITE_PORT * REQ: 00 01 00 14 00 10 01 0F 02 10 00 00 00 03 <PORT> 00 03 <BMAP> 00 00 * RES: 00 01 00 0C 00 08 01 00 00 00 00 02 * * CMD: 0x12 SET_PORT_DIR (0 = input, 1 = output) * REQ: 00 01 00 18 00 14 01 12 02 10 00 00 * 00 05 <PORT 0> <PORT 1> <PORT 2> 00 05 00 00 00 00 00 * RES: 00 01 00 0C 00 08 01 00 00 00 00 02 * * COUNTER PACKETS * * CMD 0x9: START_COUNTER * REQ: 00 01 00 0C 00 08 01 09 02 20 00 00 * RES: 00 01 00 0C 00 08 01 00 00 00 00 02 * * CMD 0xC: STOP_COUNTER * REQ: 00 01 00 0C 00 08 01 0C 02 20 00 00 * RES: 00 01 00 0C 00 08 01 00 00 00 00 02 * * CMD 0xE: READ_COUNTER * REQ: 00 01 00 0C 00 08 01 0E 02 20 00 00 * RES: 00 01 00 10 00 0C 01 00 00 00 00 02 <u32 counter value, Big Endian> * * CMD 0xF: WRITE_COUNTER * REQ: 00 01 00 10 00 0C 01 0F 02 20 00 00 <u32 counter value, Big Endian> * RES: 00 01 00 0C 00 08 01 00 00 00 00 02 * * * Please visit https://www.brickedbrain.com if you need * additional information or have any questions. * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/comedi/comedi_usb.h> #define NI6501_TIMEOUT … /* Port request packets */ static const u8 READ_PORT_REQUEST[] = …; static const u8 WRITE_PORT_REQUEST[] = …; static const u8 SET_PORT_DIR_REQUEST[] = …; /* Counter request packets */ static const u8 START_COUNTER_REQUEST[] = …; static const u8 STOP_COUNTER_REQUEST[] = …; static const u8 READ_COUNTER_REQUEST[] = …; static const u8 WRITE_COUNTER_REQUEST[] = …; /* Response packets */ static const u8 GENERIC_RESPONSE[] = …; static const u8 READ_PORT_RESPONSE[] = …; static const u8 READ_COUNTER_RESPONSE[] = …; /* Largest supported packets */ static const size_t TX_MAX_SIZE = …; static const size_t RX_MAX_SIZE = …; enum commands { … }; struct ni6501_private { … }; static int ni6501_port_command(struct comedi_device *dev, int command, unsigned int val, u8 *bitmap) { … } static int ni6501_counter_command(struct comedi_device *dev, int command, u32 *val) { … } static int ni6501_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int ni6501_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int ni6501_cnt_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int ni6501_cnt_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int ni6501_cnt_insn_write(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int ni6501_alloc_usb_buffers(struct comedi_device *dev) { … } static int ni6501_find_endpoints(struct comedi_device *dev) { … } static int ni6501_auto_attach(struct comedi_device *dev, unsigned long context) { … } static void ni6501_detach(struct comedi_device *dev) { … } static struct comedi_driver ni6501_driver = …; static int ni6501_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { … } static const struct usb_device_id ni6501_usb_table[] = …; MODULE_DEVICE_TABLE(usb, ni6501_usb_table); static struct usb_driver ni6501_usb_driver = …; module_comedi_usb_driver(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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