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Commit | Line | Data |
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a7b5a2c4 AB |
1 | /* |
2 | comedi/drivers/rti802.c | |
3 | Hardware driver for Analog Devices RTI-802 board | |
4 | ||
5 | COMEDI - Linux Control and Measurement Device Interface | |
6 | Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se> | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | ||
22 | */ | |
23 | /* | |
24 | Driver: rti802 | |
25 | Description: Analog Devices RTI-802 | |
26 | Author: Anders Blomdell <anders.blomdell@control.lth.se> | |
27 | Devices: [Analog Devices] RTI-802 (rti802) | |
28 | Status: works | |
29 | ||
30 | Configuration Options: | |
31 | [0] - i/o base | |
32 | [1] - unused | |
33 | [2] - dac#0 0=two's comp, 1=straight | |
34 | [3] - dac#0 0=bipolar, 1=unipolar | |
35 | [4] - dac#1 ... | |
36 | ... | |
37 | [17] - dac#7 ... | |
38 | */ | |
39 | ||
40 | #include "../comedidev.h" | |
41 | ||
42 | #include <linux/ioport.h> | |
43 | ||
44 | #define RTI802_SIZE 4 | |
45 | ||
46 | #define RTI802_SELECT 0 | |
47 | #define RTI802_DATALOW 1 | |
48 | #define RTI802_DATAHIGH 2 | |
49 | ||
71b5f4f1 BP |
50 | static int rti802_attach(struct comedi_device * dev, comedi_devconfig * it); |
51 | static int rti802_detach(struct comedi_device * dev); | |
a7b5a2c4 AB |
52 | static comedi_driver driver_rti802 = { |
53 | driver_name:"rti802", | |
54 | module:THIS_MODULE, | |
55 | attach:rti802_attach, | |
56 | detach:rti802_detach, | |
57 | }; | |
58 | ||
59 | COMEDI_INITCLEANUP(driver_rti802); | |
60 | ||
61 | typedef struct { | |
62 | enum { | |
63 | dac_2comp, dac_straight | |
64 | } dac_coding[8]; | |
65 | const comedi_lrange *range_type_list[8]; | |
790c5541 | 66 | unsigned int ao_readback[8]; |
a7b5a2c4 AB |
67 | } rti802_private; |
68 | ||
69 | #define devpriv ((rti802_private *)dev->private) | |
70 | ||
71b5f4f1 | 71 | static int rti802_ao_insn_read(struct comedi_device * dev, comedi_subdevice * s, |
790c5541 | 72 | comedi_insn * insn, unsigned int * data) |
a7b5a2c4 AB |
73 | { |
74 | int i; | |
75 | ||
76 | for (i = 0; i < insn->n; i++) | |
77 | data[i] = devpriv->ao_readback[CR_CHAN(insn->chanspec)]; | |
78 | ||
79 | return i; | |
80 | } | |
81 | ||
71b5f4f1 | 82 | static int rti802_ao_insn_write(struct comedi_device * dev, comedi_subdevice * s, |
790c5541 | 83 | comedi_insn * insn, unsigned int * data) |
a7b5a2c4 AB |
84 | { |
85 | int i, d; | |
86 | int chan = CR_CHAN(insn->chanspec); | |
87 | ||
88 | for (i = 0; i < insn->n; i++) { | |
89 | d = devpriv->ao_readback[chan] = data[i]; | |
90 | if (devpriv->dac_coding[chan] == dac_2comp) | |
91 | d ^= 0x800; | |
92 | outb(chan, dev->iobase + RTI802_SELECT); | |
93 | outb(d & 0xff, dev->iobase + RTI802_DATALOW); | |
94 | outb(d >> 8, dev->iobase + RTI802_DATAHIGH); | |
95 | } | |
96 | return i; | |
97 | } | |
98 | ||
71b5f4f1 | 99 | static int rti802_attach(struct comedi_device * dev, comedi_devconfig * it) |
a7b5a2c4 AB |
100 | { |
101 | comedi_subdevice *s; | |
102 | int i; | |
103 | unsigned long iobase; | |
104 | ||
105 | iobase = it->options[0]; | |
106 | printk("comedi%d: rti802: 0x%04lx ", dev->minor, iobase); | |
107 | if (!request_region(iobase, RTI802_SIZE, "rti802")) { | |
108 | printk("I/O port conflict\n"); | |
109 | return -EIO; | |
110 | } | |
111 | dev->iobase = iobase; | |
112 | ||
113 | dev->board_name = "rti802"; | |
114 | ||
115 | if (alloc_subdevices(dev, 1) < 0 | |
116 | || alloc_private(dev, sizeof(rti802_private))) { | |
117 | return -ENOMEM; | |
118 | } | |
119 | ||
120 | s = dev->subdevices; | |
121 | /* ao subdevice */ | |
122 | s->type = COMEDI_SUBD_AO; | |
123 | s->subdev_flags = SDF_WRITABLE; | |
124 | s->maxdata = 0xfff; | |
125 | s->n_chan = 8; | |
126 | s->insn_read = rti802_ao_insn_read; | |
127 | s->insn_write = rti802_ao_insn_write; | |
128 | s->range_table_list = devpriv->range_type_list; | |
129 | ||
130 | for (i = 0; i < 8; i++) { | |
131 | devpriv->dac_coding[i] = (it->options[3 + 2 * i]) | |
132 | ? (dac_straight) | |
133 | : (dac_2comp); | |
134 | devpriv->range_type_list[i] = (it->options[2 + 2 * i]) | |
135 | ? &range_unipolar10 : &range_bipolar10; | |
136 | } | |
137 | ||
138 | printk("\n"); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
71b5f4f1 | 143 | static int rti802_detach(struct comedi_device * dev) |
a7b5a2c4 AB |
144 | { |
145 | printk("comedi%d: rti802: remove\n", dev->minor); | |
146 | ||
147 | if (dev->iobase) | |
148 | release_region(dev->iobase, RTI802_SIZE); | |
149 | ||
150 | return 0; | |
151 | } |