1 // SPDX-License-Identifier: GPL-2.0
4  * Comedi driver for Advantech PCM-3724 Digital I/O board
11  * Description: Advantech PCM-3724
12  * Devices: [Advantech] PCM-3724 (pcm3724)
16  * This is driver for digital I/O boards PCM-3724 with 48 DIO.
23  *   [0] - I/O port base address
33  * This board has two standard 8255 devices that provide six 8-bit DIO ports
36  * bidirectional, tri-state line buffer, two additional I/O ports are used
65 	if (s->io_bits & 0x0000ff) {  in compute_buffer()
71 	if (s->io_bits & 0x00ff00) {  in compute_buffer()
77 	if (s->io_bits & 0xff0000) {  in compute_buffer()
89 	struct comedi_subdevice *s_dio1 = &dev->subdevices[0];  in do_3724_config()
90 	struct comedi_subdevice *s_dio2 = &dev->subdevices[1];  in do_3724_config()
98 	if (!(s->io_bits & 0x0000ff))  in do_3724_config()
101 	if (!(s->io_bits & 0x00ff00))  in do_3724_config()
104 	if (!(s->io_bits & 0xff0000))  in do_3724_config()
111 		port_8255_cfg = dev->iobase + I8255_CTRL_REG;  in do_3724_config()
113 		port_8255_cfg = dev->iobase + I8255_SIZE + I8255_CTRL_REG;  in do_3724_config()
115 	outb(buffer_config, dev->iobase + PCM3724_DIO_DIR_REG);  in do_3724_config()
123 	struct priv_pcm3724 *priv = dev->private;  in enable_chan()
124 	struct comedi_subdevice *s_dio1 = &dev->subdevices[0];  in enable_chan()
132 		priv->dio_1 |= mask;  in enable_chan()
134 		priv->dio_2 |= mask;  in enable_chan()
136 	if (priv->dio_1 & 0xff0000)  in enable_chan()
139 	if (priv->dio_1 & 0xff00)  in enable_chan()
142 	if (priv->dio_1 & 0xff)  in enable_chan()
145 	if (priv->dio_2 & 0xff0000)  in enable_chan()
148 	if (priv->dio_2 & 0xff00)  in enable_chan()
151 	if (priv->dio_2 & 0xff)  in enable_chan()
154 	outb(gatecfg, dev->iobase + PCM3724_GATE_CTRL_REG);  in enable_chan()
163 	unsigned int chan = CR_CHAN(insn->chanspec);  in subdev_3724_insn_config()
180 	do_3724_config(dev, s, insn->chanspec);  in subdev_3724_insn_config()
181 	enable_chan(dev, s, insn->chanspec);  in subdev_3724_insn_config()
183 	return insn->n;  in subdev_3724_insn_config()
195 		return -ENOMEM;  in pcm3724_attach()
197 	ret = comedi_request_region(dev, it->options[0], 0x10);  in pcm3724_attach()
205 	for (i = 0; i < dev->n_subdevices; i++) {  in pcm3724_attach()
206 		s = &dev->subdevices[i];  in pcm3724_attach()
210 		s->insn_config = subdev_3724_insn_config;  in pcm3724_attach()
224 MODULE_DESCRIPTION("Comedi driver for Advantech PCM-3724 Digital I/O board");