1/*
2    comedi/drivers/ni_670x.c
3    Hardware driver for NI 670x devices
4
5    COMEDI - Linux Control and Measurement Device Interface
6    Copyright (C) 1997-2001 David A. Schleef <ds@schleef.org>
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/*
19Driver: ni_670x
20Description: National Instruments 670x
21Author: Bart Joris <bjoris@advalvas.be>
22Updated: Wed, 11 Dec 2002 18:25:35 -0800
23Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
24Status: unknown
25
26Commands are not supported.
27*/
28
29/*
30	Bart Joris <bjoris@advalvas.be> Last updated on 20/08/2001
31
32	Manuals:
33
34	322110a.pdf	PCI/PXI-6704 User Manual
35	322110b.pdf	PCI/PXI-6703/6704 User Manual
36
37*/
38
39#include <linux/module.h>
40#include <linux/pci.h>
41#include <linux/interrupt.h>
42#include <linux/slab.h>
43
44#include "../comedidev.h"
45
46#define AO_VALUE_OFFSET			0x00
47#define	AO_CHAN_OFFSET			0x0c
48#define	AO_STATUS_OFFSET		0x10
49#define AO_CONTROL_OFFSET		0x10
50#define	DIO_PORT0_DIR_OFFSET	0x20
51#define	DIO_PORT0_DATA_OFFSET	0x24
52#define	DIO_PORT1_DIR_OFFSET	0x28
53#define	DIO_PORT1_DATA_OFFSET	0x2c
54#define	MISC_STATUS_OFFSET		0x14
55#define	MISC_CONTROL_OFFSET		0x14
56
57enum ni_670x_boardid {
58	BOARD_PCI6703,
59	BOARD_PXI6704,
60	BOARD_PCI6704,
61};
62
63struct ni_670x_board {
64	const char *name;
65	unsigned short ao_chans;
66};
67
68static const struct ni_670x_board ni_670x_boards[] = {
69	[BOARD_PCI6703] = {
70		.name		= "PCI-6703",
71		.ao_chans	= 16,
72	},
73	[BOARD_PXI6704] = {
74		.name		= "PXI-6704",
75		.ao_chans	= 32,
76	},
77	[BOARD_PCI6704] = {
78		.name		= "PCI-6704",
79		.ao_chans	= 32,
80	},
81};
82
83struct ni_670x_private {
84	int boardtype;
85	int dio;
86};
87
88static int ni_670x_ao_insn_write(struct comedi_device *dev,
89				 struct comedi_subdevice *s,
90				 struct comedi_insn *insn,
91				 unsigned int *data)
92{
93	unsigned int chan = CR_CHAN(insn->chanspec);
94	unsigned int val = s->readback[chan];
95	int i;
96
97	/*
98	 * Channel number mapping:
99	 *
100	 * NI 6703/ NI 6704 | NI 6704 Only
101	 * -------------------------------
102	 * vch(0)  :  0     | ich(16) :  1
103	 * vch(1)  :  2     | ich(17) :  3
104	 * ...              | ...
105	 * vch(15) : 30     | ich(31) : 31
106	 */
107	for (i = 0; i < insn->n; i++) {
108		val = data[i];
109		/* First write in channel register which channel to use */
110		writel(((chan & 15) << 1) | ((chan & 16) >> 4),
111		       dev->mmio + AO_CHAN_OFFSET);
112		/* write channel value */
113		writel(val, dev->mmio + AO_VALUE_OFFSET);
114	}
115	s->readback[chan] = val;
116
117	return insn->n;
118}
119
120static int ni_670x_dio_insn_bits(struct comedi_device *dev,
121				 struct comedi_subdevice *s,
122				 struct comedi_insn *insn,
123				 unsigned int *data)
124{
125	if (comedi_dio_update_state(s, data))
126		writel(s->state, dev->mmio + DIO_PORT0_DATA_OFFSET);
127
128	data[1] = readl(dev->mmio + DIO_PORT0_DATA_OFFSET);
129
130	return insn->n;
131}
132
133static int ni_670x_dio_insn_config(struct comedi_device *dev,
134				   struct comedi_subdevice *s,
135				   struct comedi_insn *insn,
136				   unsigned int *data)
137{
138	int ret;
139
140	ret = comedi_dio_insn_config(dev, s, insn, data, 0);
141	if (ret)
142		return ret;
143
144	writel(s->io_bits, dev->mmio + DIO_PORT0_DIR_OFFSET);
145
146	return insn->n;
147}
148
149/* ripped from mite.h and mite_setup2() to avoid mite dependancy */
150#define MITE_IODWBSR	0xc0	 /* IO Device Window Base Size Register */
151#define WENAB		(1 << 7) /* window enable */
152
153static int ni_670x_mite_init(struct pci_dev *pcidev)
154{
155	void __iomem *mite_base;
156	u32 main_phys_addr;
157
158	/* ioremap the MITE registers (BAR 0) temporarily */
159	mite_base = pci_ioremap_bar(pcidev, 0);
160	if (!mite_base)
161		return -ENOMEM;
162
163	/* set data window to main registers (BAR 1) */
164	main_phys_addr = pci_resource_start(pcidev, 1);
165	writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
166
167	/* finished with MITE registers */
168	iounmap(mite_base);
169	return 0;
170}
171
172static int ni_670x_auto_attach(struct comedi_device *dev,
173			       unsigned long context)
174{
175	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
176	const struct ni_670x_board *thisboard = NULL;
177	struct ni_670x_private *devpriv;
178	struct comedi_subdevice *s;
179	int ret;
180	int i;
181
182	if (context < ARRAY_SIZE(ni_670x_boards))
183		thisboard = &ni_670x_boards[context];
184	if (!thisboard)
185		return -ENODEV;
186	dev->board_ptr = thisboard;
187	dev->board_name = thisboard->name;
188
189	ret = comedi_pci_enable(dev);
190	if (ret)
191		return ret;
192
193	devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
194	if (!devpriv)
195		return -ENOMEM;
196
197	ret = ni_670x_mite_init(pcidev);
198	if (ret)
199		return ret;
200
201	dev->mmio = pci_ioremap_bar(pcidev, 1);
202	if (!dev->mmio)
203		return -ENOMEM;
204
205	ret = comedi_alloc_subdevices(dev, 2);
206	if (ret)
207		return ret;
208
209	s = &dev->subdevices[0];
210	/* analog output subdevice */
211	s->type = COMEDI_SUBD_AO;
212	s->subdev_flags = SDF_WRITABLE;
213	s->n_chan = thisboard->ao_chans;
214	s->maxdata = 0xffff;
215	if (s->n_chan == 32) {
216		const struct comedi_lrange **range_table_list;
217
218		range_table_list = kmalloc(sizeof(struct comedi_lrange *) * 32,
219					   GFP_KERNEL);
220		if (!range_table_list)
221			return -ENOMEM;
222		s->range_table_list = range_table_list;
223		for (i = 0; i < 16; i++) {
224			range_table_list[i] = &range_bipolar10;
225			range_table_list[16 + i] = &range_0_20mA;
226		}
227	} else {
228		s->range_table = &range_bipolar10;
229	}
230	s->insn_write = ni_670x_ao_insn_write;
231	s->insn_read = comedi_readback_insn_read;
232
233	ret = comedi_alloc_subdev_readback(s);
234	if (ret)
235		return ret;
236
237	s = &dev->subdevices[1];
238	/* digital i/o subdevice */
239	s->type = COMEDI_SUBD_DIO;
240	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
241	s->n_chan = 8;
242	s->maxdata = 1;
243	s->range_table = &range_digital;
244	s->insn_bits = ni_670x_dio_insn_bits;
245	s->insn_config = ni_670x_dio_insn_config;
246
247	/* Config of misc registers */
248	writel(0x10, dev->mmio + MISC_CONTROL_OFFSET);
249	/* Config of ao registers */
250	writel(0x00, dev->mmio + AO_CONTROL_OFFSET);
251
252	return 0;
253}
254
255static void ni_670x_detach(struct comedi_device *dev)
256{
257	struct comedi_subdevice *s;
258
259	comedi_pci_detach(dev);
260	if (dev->n_subdevices) {
261		s = &dev->subdevices[0];
262		if (s)
263			kfree(s->range_table_list);
264	}
265}
266
267static struct comedi_driver ni_670x_driver = {
268	.driver_name	= "ni_670x",
269	.module		= THIS_MODULE,
270	.auto_attach	= ni_670x_auto_attach,
271	.detach		= ni_670x_detach,
272};
273
274static int ni_670x_pci_probe(struct pci_dev *dev,
275			     const struct pci_device_id *id)
276{
277	return comedi_pci_auto_config(dev, &ni_670x_driver, id->driver_data);
278}
279
280static const struct pci_device_id ni_670x_pci_table[] = {
281	{ PCI_VDEVICE(NI, 0x1290), BOARD_PCI6704 },
282	{ PCI_VDEVICE(NI, 0x1920), BOARD_PXI6704 },
283	{ PCI_VDEVICE(NI, 0x2c90), BOARD_PCI6703 },
284	{ 0 }
285};
286MODULE_DEVICE_TABLE(pci, ni_670x_pci_table);
287
288static struct pci_driver ni_670x_pci_driver = {
289	.name		= "ni_670x",
290	.id_table	= ni_670x_pci_table,
291	.probe		= ni_670x_pci_probe,
292	.remove		= comedi_pci_auto_unconfig,
293};
294module_comedi_pci_driver(ni_670x_driver, ni_670x_pci_driver);
295
296MODULE_AUTHOR("Comedi http://www.comedi.org");
297MODULE_DESCRIPTION("Comedi low-level driver");
298MODULE_LICENSE("GPL");
299