1 /*
2 comedi/drivers/das08_cs.c
3 DAS08 driver
4
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
7 Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22
23 *****************************************************************
24
25 */
26 /*
27 Driver: das08_cs
28 Description: DAS-08 PCMCIA boards
29 Author: Warren Jasper, ds, Frank Hess
30 Devices: [ComputerBoards] PCM-DAS08 (pcm-das08)
31 Status: works
32
33 This is the PCMCIA-specific support split off from the
34 das08 driver.
35
36 Options (for pcm-das08):
37 NONE
38
39 Command support does not exist, but could be added for this board.
40 */
41
42 #include "../comedidev.h"
43
44 #include <linux/delay.h>
45 #include <linux/pci.h>
46 #include <linux/slab.h>
47
48 #include "das08.h"
49
50 /* pcmcia includes */
51 #include <pcmcia/cistpl.h>
52 #include <pcmcia/ds.h>
53
54 static struct pcmcia_device *cur_dev;
55
56 #define thisboard ((const struct das08_board_struct *)dev->board_ptr)
57
58 static int das08_cs_attach(struct comedi_device *dev,
59 struct comedi_devconfig *it);
60
61 static struct comedi_driver driver_das08_cs = {
62 .driver_name = "das08_cs",
63 .module = THIS_MODULE,
64 .attach = das08_cs_attach,
65 .detach = das08_common_detach,
66 .board_name = &das08_cs_boards[0].name,
67 .num_names = ARRAY_SIZE(das08_cs_boards),
68 .offset = sizeof(struct das08_board_struct),
69 };
70
das08_cs_attach(struct comedi_device * dev,struct comedi_devconfig * it)71 static int das08_cs_attach(struct comedi_device *dev,
72 struct comedi_devconfig *it)
73 {
74 int ret;
75 unsigned long iobase;
76 struct pcmcia_device *link = cur_dev; /* XXX hack */
77
78 ret = alloc_private(dev, sizeof(struct das08_private_struct));
79 if (ret < 0)
80 return ret;
81
82 dev_info(dev->hw_dev, "comedi%d: das08_cs:\n", dev->minor);
83 /* deal with a pci board */
84
85 if (thisboard->bustype == pcmcia) {
86 if (link == NULL) {
87 dev_err(dev->hw_dev, "no pcmcia cards found\n");
88 return -EIO;
89 }
90 iobase = link->resource[0]->start;
91 } else {
92 dev_err(dev->hw_dev, "bug! board does not have PCMCIA bustype\n");
93 return -EINVAL;
94 }
95
96 return das08_common_attach(dev, iobase);
97 }
98
99 /*======================================================================
100
101 The following pcmcia code for the pcm-das08 is adapted from the
102 dummy_cs.c driver of the Linux PCMCIA Card Services package.
103
104 The initial developer of the original code is David A. Hinds
105 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
106 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
107
108 ======================================================================*/
109
110 static void das08_pcmcia_config(struct pcmcia_device *link);
111 static void das08_pcmcia_release(struct pcmcia_device *link);
112 static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
113 static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
114
115 static int das08_pcmcia_attach(struct pcmcia_device *);
116 static void das08_pcmcia_detach(struct pcmcia_device *);
117
118 struct local_info_t {
119 struct pcmcia_device *link;
120 int stop;
121 struct bus_operations *bus;
122 };
123
das08_pcmcia_attach(struct pcmcia_device * link)124 static int das08_pcmcia_attach(struct pcmcia_device *link)
125 {
126 struct local_info_t *local;
127
128 dev_dbg(&link->dev, "das08_pcmcia_attach()\n");
129
130 /* Allocate space for private device-specific data */
131 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
132 if (!local)
133 return -ENOMEM;
134 local->link = link;
135 link->priv = local;
136
137 cur_dev = link;
138
139 das08_pcmcia_config(link);
140
141 return 0;
142 } /* das08_pcmcia_attach */
143
das08_pcmcia_detach(struct pcmcia_device * link)144 static void das08_pcmcia_detach(struct pcmcia_device *link)
145 {
146
147 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
148
149 ((struct local_info_t *)link->priv)->stop = 1;
150 das08_pcmcia_release(link);
151
152 /* This points to the parent struct local_info_t struct */
153 kfree(link->priv);
154
155 } /* das08_pcmcia_detach */
156
157
das08_pcmcia_config_loop(struct pcmcia_device * p_dev,void * priv_data)158 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
159 void *priv_data)
160 {
161 if (p_dev->config_index == 0)
162 return -EINVAL;
163
164 return pcmcia_request_io(p_dev);
165 }
166
das08_pcmcia_config(struct pcmcia_device * link)167 static void das08_pcmcia_config(struct pcmcia_device *link)
168 {
169 int ret;
170
171 dev_dbg(&link->dev, "das08_pcmcia_config\n");
172
173 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
174
175 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
176 if (ret) {
177 dev_warn(&link->dev, "no configuration found\n");
178 goto failed;
179 }
180
181 if (!link->irq)
182 goto failed;
183
184 ret = pcmcia_enable_device(link);
185 if (ret)
186 goto failed;
187
188 return;
189
190 failed:
191 das08_pcmcia_release(link);
192
193 } /* das08_pcmcia_config */
194
das08_pcmcia_release(struct pcmcia_device * link)195 static void das08_pcmcia_release(struct pcmcia_device *link)
196 {
197 dev_dbg(&link->dev, "das08_pcmcia_release\n");
198 pcmcia_disable_device(link);
199 } /* das08_pcmcia_release */
200
das08_pcmcia_suspend(struct pcmcia_device * link)201 static int das08_pcmcia_suspend(struct pcmcia_device *link)
202 {
203 struct local_info_t *local = link->priv;
204 /* Mark the device as stopped, to block IO until later */
205 local->stop = 1;
206
207 return 0;
208 } /* das08_pcmcia_suspend */
209
das08_pcmcia_resume(struct pcmcia_device * link)210 static int das08_pcmcia_resume(struct pcmcia_device *link)
211 {
212 struct local_info_t *local = link->priv;
213
214 local->stop = 0;
215 return 0;
216 } /* das08_pcmcia_resume */
217
218 /*====================================================================*/
219
220 static const struct pcmcia_device_id das08_cs_id_table[] = {
221 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
222 PCMCIA_DEVICE_NULL
223 };
224
225 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
226 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
227 "Frank Mori Hess <fmhess@users.sourceforge.net>");
228 MODULE_DESCRIPTION("Comedi driver for ComputerBoards DAS-08 PCMCIA boards");
229 MODULE_LICENSE("GPL");
230
231 struct pcmcia_driver das08_cs_driver = {
232 .probe = das08_pcmcia_attach,
233 .remove = das08_pcmcia_detach,
234 .suspend = das08_pcmcia_suspend,
235 .resume = das08_pcmcia_resume,
236 .id_table = das08_cs_id_table,
237 .owner = THIS_MODULE,
238 .name = "pcm-das08",
239 };
240
init_das08_pcmcia_cs(void)241 static int __init init_das08_pcmcia_cs(void)
242 {
243 pcmcia_register_driver(&das08_cs_driver);
244 return 0;
245 }
246
exit_das08_pcmcia_cs(void)247 static void __exit exit_das08_pcmcia_cs(void)
248 {
249 pr_debug("das08_pcmcia_cs: unloading\n");
250 pcmcia_unregister_driver(&das08_cs_driver);
251 }
252
das08_cs_init_module(void)253 static int __init das08_cs_init_module(void)
254 {
255 int ret;
256
257 ret = init_das08_pcmcia_cs();
258 if (ret < 0)
259 return ret;
260
261 return comedi_driver_register(&driver_das08_cs);
262 }
263
das08_cs_exit_module(void)264 static void __exit das08_cs_exit_module(void)
265 {
266 exit_das08_pcmcia_cs();
267 comedi_driver_unregister(&driver_das08_cs);
268 }
269
270 module_init(das08_cs_init_module);
271 module_exit(das08_cs_exit_module);
272