diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/aio_iiro_16.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/aio_iiro_16.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/drivers/staging/comedi/drivers/aio_iiro_16.c b/drivers/staging/comedi/drivers/aio_iiro_16.c deleted file mode 100644 index fe3876235075..000000000000 --- a/drivers/staging/comedi/drivers/aio_iiro_16.c +++ /dev/null @@ -1,235 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * aio_iiro_16.c - * Comedi driver for Access I/O Products 104-IIRO-16 board - * Copyright (C) 2006 C&C Technologies, Inc. - */ - -/* - * Driver: aio_iiro_16 - * Description: Access I/O Products PC/104 Isolated Input/Relay Output Board - * Author: Zachary Ware <zach.ware@cctechnol.com> - * Devices: [Access I/O] 104-IIRO-16 (aio_iiro_16) - * Status: experimental - * - * Configuration Options: - * [0] - I/O port base address - * [1] - IRQ (optional) - * - * The board supports interrupts on change of state of the digital inputs. - * The sample data returned by the async command indicates which inputs - * changed state and the current state of the inputs: - * - * Bit 23 - IRQ Enable (1) / Disable (0) - * Bit 17 - Input 8-15 Changed State (1 = Changed, 0 = No Change) - * Bit 16 - Input 0-7 Changed State (1 = Changed, 0 = No Change) - * Bit 15 - Digital input 15 - * ... - * Bit 0 - Digital input 0 - */ - -#include <linux/module.h> -#include <linux/interrupt.h> - -#include "../comedidev.h" - -#define AIO_IIRO_16_RELAY_0_7 0x00 -#define AIO_IIRO_16_INPUT_0_7 0x01 -#define AIO_IIRO_16_IRQ 0x02 -#define AIO_IIRO_16_RELAY_8_15 0x04 -#define AIO_IIRO_16_INPUT_8_15 0x05 -#define AIO_IIRO_16_STATUS 0x07 -#define AIO_IIRO_16_STATUS_IRQE BIT(7) -#define AIO_IIRO_16_STATUS_INPUT_8_15 BIT(1) -#define AIO_IIRO_16_STATUS_INPUT_0_7 BIT(0) - -static unsigned int aio_iiro_16_read_inputs(struct comedi_device *dev) -{ - unsigned int val; - - val = inb(dev->iobase + AIO_IIRO_16_INPUT_0_7); - val |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8; - - return val; -} - -static irqreturn_t aio_iiro_16_cos(int irq, void *d) -{ - struct comedi_device *dev = d; - struct comedi_subdevice *s = dev->read_subdev; - unsigned int status; - unsigned int val; - - status = inb(dev->iobase + AIO_IIRO_16_STATUS); - if (!(status & AIO_IIRO_16_STATUS_IRQE)) - return IRQ_NONE; - - val = aio_iiro_16_read_inputs(dev); - val |= (status << 16); - - comedi_buf_write_samples(s, &val, 1); - comedi_handle_events(dev, s); - - return IRQ_HANDLED; -} - -static void aio_iiro_enable_irq(struct comedi_device *dev, bool enable) -{ - if (enable) - inb(dev->iobase + AIO_IIRO_16_IRQ); - else - outb(0, dev->iobase + AIO_IIRO_16_IRQ); -} - -static int aio_iiro_16_cos_cancel(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - aio_iiro_enable_irq(dev, false); - - return 0; -} - -static int aio_iiro_16_cos_cmd(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - aio_iiro_enable_irq(dev, true); - - return 0; -} - -static int aio_iiro_16_cos_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_cmd *cmd) -{ - int err = 0; - - /* Step 1 : check if triggers are trivially valid */ - - err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); - err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT); - err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW); - err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); - err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE); - - if (err) - return 1; - - /* Step 2a : make sure trigger sources are unique */ - /* Step 2b : and mutually compatible */ - - /* Step 3: check if arguments are trivially valid */ - - err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); - err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); - err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); - err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, - cmd->chanlist_len); - err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); - - if (err) - return 3; - - /* Step 4: fix up any arguments */ - - /* Step 5: check channel list if it exists */ - - return 0; -} - -static int aio_iiro_16_do_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - if (comedi_dio_update_state(s, data)) { - outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7); - outb((s->state >> 8) & 0xff, - dev->iobase + AIO_IIRO_16_RELAY_8_15); - } - - data[1] = s->state; - - return insn->n; -} - -static int aio_iiro_16_di_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - data[1] = aio_iiro_16_read_inputs(dev); - - return insn->n; -} - -static int aio_iiro_16_attach(struct comedi_device *dev, - struct comedi_devconfig *it) -{ - struct comedi_subdevice *s; - int ret; - - ret = comedi_request_region(dev, it->options[0], 0x8); - if (ret) - return ret; - - aio_iiro_enable_irq(dev, false); - - /* - * Digital input change of state interrupts are optionally supported - * using IRQ 2-7, 10-12, 14, or 15. - */ - if ((1 << it->options[1]) & 0xdcfc) { - ret = request_irq(it->options[1], aio_iiro_16_cos, 0, - dev->board_name, dev); - if (ret == 0) - dev->irq = it->options[1]; - } - - ret = comedi_alloc_subdevices(dev, 2); - if (ret) - return ret; - - /* Digital Output subdevice */ - s = &dev->subdevices[0]; - s->type = COMEDI_SUBD_DO; - s->subdev_flags = SDF_WRITABLE; - s->n_chan = 16; - s->maxdata = 1; - s->range_table = &range_digital; - s->insn_bits = aio_iiro_16_do_insn_bits; - - /* get the initial state of the relays */ - s->state = inb(dev->iobase + AIO_IIRO_16_RELAY_0_7) | - (inb(dev->iobase + AIO_IIRO_16_RELAY_8_15) << 8); - - /* Digital Input subdevice */ - s = &dev->subdevices[1]; - s->type = COMEDI_SUBD_DI; - s->subdev_flags = SDF_READABLE; - s->n_chan = 16; - s->maxdata = 1; - s->range_table = &range_digital; - s->insn_bits = aio_iiro_16_di_insn_bits; - if (dev->irq) { - dev->read_subdev = s; - s->subdev_flags |= SDF_CMD_READ | SDF_LSAMPL; - s->len_chanlist = 1; - s->do_cmdtest = aio_iiro_16_cos_cmdtest; - s->do_cmd = aio_iiro_16_cos_cmd; - s->cancel = aio_iiro_16_cos_cancel; - } - - return 0; -} - -static struct comedi_driver aio_iiro_16_driver = { - .driver_name = "aio_iiro_16", - .module = THIS_MODULE, - .attach = aio_iiro_16_attach, - .detach = comedi_legacy_detach, -}; -module_comedi_driver(aio_iiro_16_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi driver for Access I/O Products 104-IIRO-16 board"); -MODULE_LICENSE("GPL"); |