Commit | Line | Data |
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56af390d | 1 | /* |
9cdb432c HS |
2 | * aio_iiro_16.c |
3 | * Comedi driver for Access I/O Products 104-IIRO-16 board | |
4 | * Copyright (C) 2006 C&C Technologies, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
56af390d ZW |
16 | |
17 | /* | |
9cdb432c HS |
18 | * Driver: aio_iiro_16 |
19 | * Description: Access I/O Products PC/104 Isolated Input/Relay Output Board | |
20 | * Author: Zachary Ware <zach.ware@cctechnol.com> | |
21 | * Devices: [Access I/O] 104-IIRO-16 (aio_iiro_16) | |
22 | * Status: experimental | |
23 | * | |
24 | * Configuration Options: | |
25 | * [0] - I/O port base address | |
ad7a370c HS |
26 | * [1] - IRQ (optional) |
27 | * | |
28 | * The board supports interrupts on change of state of the digital inputs. | |
29 | * The sample data returned by the async command indicates which inputs | |
53c0bee8 | 30 | * changed state and the current state of the inputs: |
ad7a370c | 31 | * |
53c0bee8 HS |
32 | * Bit 23 - IRQ Enable (1) / Disable (0) |
33 | * Bit 17 - Input 8-15 Changed State (1 = Changed, 0 = No Change) | |
34 | * Bit 16 - Input 0-7 Changed State (1 = Changed, 0 = No Change) | |
35 | * Bit 15 - Digital input 15 | |
36 | * ... | |
37 | * Bit 0 - Digital input 0 | |
9cdb432c | 38 | */ |
56af390d | 39 | |
ce157f80 | 40 | #include <linux/module.h> |
ad7a370c HS |
41 | #include <linux/interrupt.h> |
42 | ||
56af390d | 43 | #include "../comedidev.h" |
56af390d | 44 | |
ad7a370c HS |
45 | #define AIO_IIRO_16_RELAY_0_7 0x00 |
46 | #define AIO_IIRO_16_INPUT_0_7 0x01 | |
47 | #define AIO_IIRO_16_IRQ 0x02 | |
48 | #define AIO_IIRO_16_RELAY_8_15 0x04 | |
49 | #define AIO_IIRO_16_INPUT_8_15 0x05 | |
50 | #define AIO_IIRO_16_STATUS 0x07 | |
51 | #define AIO_IIRO_16_STATUS_IRQE BIT(7) | |
52 | #define AIO_IIRO_16_STATUS_INPUT_8_15 BIT(1) | |
53 | #define AIO_IIRO_16_STATUS_INPUT_0_7 BIT(0) | |
54 | ||
53c0bee8 HS |
55 | static unsigned int aio_iiro_16_read_inputs(struct comedi_device *dev) |
56 | { | |
57 | unsigned int val; | |
58 | ||
59 | val = inb(dev->iobase + AIO_IIRO_16_INPUT_0_7); | |
60 | val |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8; | |
61 | ||
62 | return val; | |
63 | } | |
64 | ||
ad7a370c HS |
65 | static irqreturn_t aio_iiro_16_cos(int irq, void *d) |
66 | { | |
67 | struct comedi_device *dev = d; | |
68 | struct comedi_subdevice *s = dev->read_subdev; | |
69 | unsigned int status; | |
53c0bee8 | 70 | unsigned int val; |
ad7a370c HS |
71 | |
72 | status = inb(dev->iobase + AIO_IIRO_16_STATUS); | |
73 | if (!(status & AIO_IIRO_16_STATUS_IRQE)) | |
74 | return IRQ_NONE; | |
75 | ||
53c0bee8 HS |
76 | val = aio_iiro_16_read_inputs(dev); |
77 | val |= (status << 16); | |
78 | ||
79 | comedi_buf_write_samples(s, &val, 1); | |
ad7a370c HS |
80 | comedi_handle_events(dev, s); |
81 | ||
82 | return IRQ_HANDLED; | |
83 | } | |
56af390d | 84 | |
ffe1cb9a HS |
85 | static void aio_iiro_enable_irq(struct comedi_device *dev, bool enable) |
86 | { | |
87 | if (enable) | |
88 | inb(dev->iobase + AIO_IIRO_16_IRQ); | |
89 | else | |
90 | outb(0, dev->iobase + AIO_IIRO_16_IRQ); | |
91 | } | |
92 | ||
ad7a370c HS |
93 | static int aio_iiro_16_cos_cancel(struct comedi_device *dev, |
94 | struct comedi_subdevice *s) | |
95 | { | |
96 | aio_iiro_enable_irq(dev, false); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static int aio_iiro_16_cos_cmd(struct comedi_device *dev, | |
102 | struct comedi_subdevice *s) | |
103 | { | |
104 | aio_iiro_enable_irq(dev, true); | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static int aio_iiro_16_cos_cmdtest(struct comedi_device *dev, | |
110 | struct comedi_subdevice *s, | |
111 | struct comedi_cmd *cmd) | |
112 | { | |
113 | int err = 0; | |
114 | ||
115 | /* Step 1 : check if triggers are trivially valid */ | |
116 | ||
f900aec9 IA |
117 | err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); |
118 | err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT); | |
119 | err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW); | |
120 | err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); | |
121 | err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE); | |
ad7a370c HS |
122 | |
123 | if (err) | |
124 | return 1; | |
125 | ||
126 | /* Step 2a : make sure trigger sources are unique */ | |
127 | /* Step 2b : and mutually compatible */ | |
128 | ||
129 | /* Step 3: check if arguments are trivially valid */ | |
130 | ||
f900aec9 IA |
131 | err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); |
132 | err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); | |
133 | err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); | |
134 | err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, | |
135 | cmd->chanlist_len); | |
136 | err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); | |
ad7a370c HS |
137 | |
138 | if (err) | |
139 | return 3; | |
140 | ||
141 | /* Step 4: fix up any arguments */ | |
142 | ||
143 | /* Step 5: check channel list if it exists */ | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
3b78602f HS |
148 | static int aio_iiro_16_do_insn_bits(struct comedi_device *dev, |
149 | struct comedi_subdevice *s, | |
150 | struct comedi_insn *insn, | |
151 | unsigned int *data) | |
6f97a28d | 152 | { |
97f4289a | 153 | if (comedi_dio_update_state(s, data)) { |
6f97a28d HS |
154 | outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7); |
155 | outb((s->state >> 8) & 0xff, | |
156 | dev->iobase + AIO_IIRO_16_RELAY_8_15); | |
157 | } | |
56af390d | 158 | |
6f97a28d HS |
159 | data[1] = s->state; |
160 | ||
a2714e3e | 161 | return insn->n; |
6f97a28d | 162 | } |
56af390d | 163 | |
aba97d74 HS |
164 | static int aio_iiro_16_di_insn_bits(struct comedi_device *dev, |
165 | struct comedi_subdevice *s, | |
166 | struct comedi_insn *insn, | |
167 | unsigned int *data) | |
6f97a28d | 168 | { |
53c0bee8 | 169 | data[1] = aio_iiro_16_read_inputs(dev); |
6f97a28d | 170 | |
a2714e3e | 171 | return insn->n; |
6f97a28d | 172 | } |
56af390d | 173 | |
0a85b6f0 MT |
174 | static int aio_iiro_16_attach(struct comedi_device *dev, |
175 | struct comedi_devconfig *it) | |
56af390d | 176 | { |
34c43922 | 177 | struct comedi_subdevice *s; |
8b6c5694 | 178 | int ret; |
56af390d | 179 | |
862755ec | 180 | ret = comedi_request_region(dev, it->options[0], 0x8); |
c8c90a73 HS |
181 | if (ret) |
182 | return ret; | |
56af390d | 183 | |
ffe1cb9a HS |
184 | aio_iiro_enable_irq(dev, false); |
185 | ||
ad7a370c HS |
186 | /* |
187 | * Digital input change of state interrupts are optionally supported | |
188 | * using IRQ 2-7, 10-12, 14, or 15. | |
189 | */ | |
190 | if ((1 << it->options[1]) & 0xdcfc) { | |
191 | ret = request_irq(it->options[1], aio_iiro_16_cos, 0, | |
192 | dev->board_name, dev); | |
193 | if (ret == 0) | |
194 | dev->irq = it->options[1]; | |
195 | } | |
196 | ||
8b6c5694 HS |
197 | ret = comedi_alloc_subdevices(dev, 2); |
198 | if (ret) | |
199 | return ret; | |
56af390d | 200 | |
0f0d2b1b | 201 | /* Digital Output subdevice */ |
40c4db8b | 202 | s = &dev->subdevices[0]; |
0f0d2b1b HS |
203 | s->type = COMEDI_SUBD_DO; |
204 | s->subdev_flags = SDF_WRITABLE; | |
205 | s->n_chan = 16; | |
206 | s->maxdata = 1; | |
207 | s->range_table = &range_digital; | |
208 | s->insn_bits = aio_iiro_16_do_insn_bits; | |
209 | ||
21f1801f HS |
210 | /* get the initial state of the relays */ |
211 | s->state = inb(dev->iobase + AIO_IIRO_16_RELAY_0_7) | | |
212 | (inb(dev->iobase + AIO_IIRO_16_RELAY_8_15) << 8); | |
213 | ||
0f0d2b1b | 214 | /* Digital Input subdevice */ |
40c4db8b | 215 | s = &dev->subdevices[1]; |
0f0d2b1b HS |
216 | s->type = COMEDI_SUBD_DI; |
217 | s->subdev_flags = SDF_READABLE; | |
218 | s->n_chan = 16; | |
219 | s->maxdata = 1; | |
220 | s->range_table = &range_digital; | |
221 | s->insn_bits = aio_iiro_16_di_insn_bits; | |
ad7a370c HS |
222 | if (dev->irq) { |
223 | dev->read_subdev = s; | |
53c0bee8 | 224 | s->subdev_flags |= SDF_CMD_READ | SDF_LSAMPL; |
ad7a370c HS |
225 | s->len_chanlist = 1; |
226 | s->do_cmdtest = aio_iiro_16_cos_cmdtest; | |
227 | s->do_cmd = aio_iiro_16_cos_cmd; | |
228 | s->cancel = aio_iiro_16_cos_cancel; | |
229 | } | |
56af390d | 230 | |
fb780d21 | 231 | return 0; |
56af390d ZW |
232 | } |
233 | ||
294f930d | 234 | static struct comedi_driver aio_iiro_16_driver = { |
6f97a28d HS |
235 | .driver_name = "aio_iiro_16", |
236 | .module = THIS_MODULE, | |
237 | .attach = aio_iiro_16_attach, | |
21208519 | 238 | .detach = comedi_legacy_detach, |
6f97a28d | 239 | }; |
294f930d | 240 | module_comedi_driver(aio_iiro_16_driver); |
90f703d3 AT |
241 | |
242 | MODULE_AUTHOR("Comedi http://www.comedi.org"); | |
a52355ee | 243 | MODULE_DESCRIPTION("Comedi driver for Access I/O Products 104-IIRO-16 board"); |
90f703d3 | 244 | MODULE_LICENSE("GPL"); |