[deliverable/linux.git] / drivers / staging / comedi / drivers / das08_cs.c

/*
    comedi/drivers/das08_cs.c
    DAS08 driver

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
    Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*****************************************************************

*/
/*
Driver: das08_cs
Description: DAS-08 PCMCIA boards
Author: Warren Jasper, ds, Frank Hess
Devices: [ComputerBoards] PCM-DAS08 (pcm-das08)
Status: works

This is the PCMCIA-specific support split off from the
das08 driver.

Options (for pcm-das08):
        NONE

Command support does not exist, but could be added for this board.
*/

#include "../comedidev.h"

#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/version.h>

#include "das08.h"

// pcmcia includes
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>

static struct pcmcia_device *cur_dev = NULL;

#define thisboard ((const struct das08_board_struct *)dev->board_ptr)

static int das08_cs_attach(comedi_device * dev, comedi_devconfig * it);

static comedi_driver driver_das08_cs = {
      driver_name:"das08_cs",
      module:THIS_MODULE,
      attach:das08_cs_attach,
      detach:das08_common_detach,
      board_name:&das08_cs_boards[0].name,
      num_names:sizeof(das08_cs_boards) /
		sizeof(struct das08_board_struct),
      offset:sizeof(struct das08_board_struct),
};

static int das08_cs_attach(comedi_device * dev, comedi_devconfig * it)
{
	int ret;
	unsigned long iobase;
	struct pcmcia_device *link = cur_dev;	// XXX hack

	if ((ret = alloc_private(dev, sizeof(struct das08_private_struct))) < 0)
		return ret;

	printk("comedi%d: das08_cs: ", dev->minor);
	// deal with a pci board

	if (thisboard->bustype == pcmcia) {
		if (link == NULL) {
			printk(" no pcmcia cards found\n");
			return -EIO;
		}
		iobase = link->io.BasePort1;
	} else {
		printk(" bug! board does not have PCMCIA bustype\n");
		return -EINVAL;
	}

	printk("\n");

	return das08_common_attach(dev, iobase);
}

/*======================================================================

    The following pcmcia code for the pcm-das08 is adapted from the
    dummy_cs.c driver of the Linux PCMCIA Card Services package.

    The initial developer of the original code is David A. Hinds
    <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
    are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.

======================================================================*/

/*
   All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
   you do not define PCMCIA_DEBUG at all, all the debug code will be
   left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
   be present but disabled -- but it can then be enabled for specific
   modules at load time with a 'pc_debug=#' option to insmod.
*/

#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0644);
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
static const char *version =
	"das08.c pcmcia code (Frank Hess), modified from dummy_cs.c 1.31 2001/08/24 12:13:13 (David Hinds)";
#else
#define DEBUG(n, args...)
#endif

/*====================================================================*/
static void das08_pcmcia_config(struct pcmcia_device *link);
static void das08_pcmcia_release(struct pcmcia_device *link);
static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
static int das08_pcmcia_resume(struct pcmcia_device *p_dev);

/*
   The attach() and detach() entry points are used to create and destroy
   "instances" of the driver, where each instance represents everything
   needed to manage one actual PCMCIA card.
*/

static int das08_pcmcia_attach(struct pcmcia_device *);
static void das08_pcmcia_detach(struct pcmcia_device *);

/*
   You'll also need to prototype all the functions that will actually
   be used to talk to your device.  See 'memory_cs' for a good example
   of a fully self-sufficient driver; the other drivers rely more or
   less on other parts of the kernel.
*/

/*
   The dev_info variable is the "key" that is used to match up this
   device driver with appropriate cards, through the card configuration
   database.
*/

static const dev_info_t dev_info = "pcm-das08";

typedef struct local_info_t {
	struct pcmcia_device *link;
	dev_node_t node;
	int stop;
	struct bus_operations *bus;
} local_info_t;

/*======================================================================

    das08_pcmcia_attach() creates an "instance" of the driver, allocating
    local data structures for one device.  The device is registered
    with Card Services.

    The dev_link structure is initialized, but we don't actually
    configure the card at this point -- we wait until we receive a
    card insertion event.

======================================================================*/

static int das08_pcmcia_attach(struct pcmcia_device *link)
{
	local_info_t *local;

	DEBUG(0, "das08_pcmcia_attach()\n");

	/* Allocate space for private device-specific data */
	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
	if (!local)
		return -ENOMEM;
	local->link = link;
	link->priv = local;

	/* Interrupt setup */
	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
	link->irq.Handler = NULL;

	/*
	   General socket configuration defaults can go here.  In this
	   client, we assume very little, and rely on the CIS for almost
	   everything.  In most clients, many details (i.e., number, sizes,
	   and attributes of IO windows) are fixed by the nature of the
	   device, and can be hard-wired here.
	 */
	link->conf.Attributes = 0;
	link->conf.IntType = INT_MEMORY_AND_IO;

	cur_dev = link;

	das08_pcmcia_config(link);

	return 0;
}				/* das08_pcmcia_attach */

/*======================================================================

    This deletes a driver "instance".  The device is de-registered
    with Card Services.  If it has been released, all local data
    structures are freed.  Otherwise, the structures will be freed
    when the device is released.

======================================================================*/

static void das08_pcmcia_detach(struct pcmcia_device *link)
{

	DEBUG(0, "das08_pcmcia_detach(0x%p)\n", link);

	if (link->dev_node) {
		((local_info_t *) link->priv)->stop = 1;
		das08_pcmcia_release(link);
	}

	/* This points to the parent local_info_t struct */
	if (link->priv)
		kfree(link->priv);

}				/* das08_pcmcia_detach */

/*======================================================================

    das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    device available to the system.

======================================================================*/

static void das08_pcmcia_config(struct pcmcia_device *link)
{
	local_info_t *dev = link->priv;
	tuple_t tuple;
	cisparse_t parse;
	int last_fn, last_ret;
	u_char buf[64];
	cistpl_cftable_entry_t dflt = { 0 };

	DEBUG(0, "das08_pcmcia_config(0x%p)\n", link);

	/*
	   This reads the card's CONFIG tuple to find its configuration
	   registers.
	 */
	tuple.DesiredTuple = CISTPL_CONFIG;
	tuple.Attributes = 0;
	tuple.TupleData = buf;
	tuple.TupleDataMax = sizeof(buf);
	tuple.TupleOffset = 0;
	last_fn = GetFirstTuple;
	if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0)
		goto cs_failed;
	last_fn = GetTupleData;
	if ((last_ret = pcmcia_get_tuple_data(link, &tuple)) != 0)
		goto cs_failed;
	last_fn = ParseTuple;
	if ((last_ret = pcmcia_parse_tuple(&tuple, &parse)) != 0)
		goto cs_failed;
	link->conf.ConfigBase = parse.config.base;
	link->conf.Present = parse.config.rmask[0];

	/*
	   In this loop, we scan the CIS for configuration table entries,
	   each of which describes a valid card configuration, including
	   voltage, IO window, memory window, and interrupt settings.

	   We make no assumptions about the card to be configured: we use
	   just the information available in the CIS.  In an ideal world,
	   this would work for any PCMCIA card, but it requires a complete
	   and accurate CIS.  In practice, a driver usually "knows" most of
	   these things without consulting the CIS, and most client drivers
	   will only use the CIS to fill in implementation-defined details.
	 */
	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	last_fn = GetFirstTuple;
	if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0)
		goto cs_failed;
	while (1) {
		cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
		if ((last_ret = pcmcia_get_tuple_data(link, &tuple)) != 0)
			goto next_entry;
		if ((last_ret = pcmcia_parse_tuple(&tuple, &parse)) != 0)
			goto next_entry;

		if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
			dflt = *cfg;
		if (cfg->index == 0)
			goto next_entry;
		link->conf.ConfigIndex = cfg->index;

		/* Does this card need audio output? */
/*	if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
		link->conf.Attributes |= CONF_ENABLE_SPKR;
		link->conf.Status = CCSR_AUDIO_ENA;
	}
*/
		/* Do we need to allocate an interrupt? */
		if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
			link->conf.Attributes |= CONF_ENABLE_IRQ;

		/* IO window settings */
		link->io.NumPorts1 = link->io.NumPorts2 = 0;
		if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
			cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
			link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
			if (!(io->flags & CISTPL_IO_8BIT))
				link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
			if (!(io->flags & CISTPL_IO_16BIT))
				link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
			link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
			link->io.BasePort1 = io->win[0].base;
			link->io.NumPorts1 = io->win[0].len;
			if (io->nwin > 1) {
				link->io.Attributes2 = link->io.Attributes1;
				link->io.BasePort2 = io->win[1].base;
				link->io.NumPorts2 = io->win[1].len;
			}
			/* This reserves IO space but doesn't actually enable it */
			if (pcmcia_request_io(link, &link->io) != 0)
				goto next_entry;
		}

		/* If we got this far, we're cool! */
		break;

	      next_entry:
		last_fn = GetNextTuple;
		if ((last_ret = pcmcia_get_next_tuple(link, &tuple)) != 0)
			goto cs_failed;
	}

	if (link->conf.Attributes & CONF_ENABLE_IRQ) {
		last_fn = RequestIRQ;
		if ((last_ret = pcmcia_request_irq(link, &link->irq)) != 0)
			goto cs_failed;
	}

	/*
	   This actually configures the PCMCIA socket -- setting up
	   the I/O windows and the interrupt mapping, and putting the
	   card and host interface into "Memory and IO" mode.
	 */
	last_fn = RequestConfiguration;
	if ((last_ret = pcmcia_request_configuration(link, &link->conf)) != 0)
		goto cs_failed;

	/*
	   At this point, the dev_node_t structure(s) need to be
	   initialized and arranged in a linked list at link->dev.
	 */
	sprintf(dev->node.dev_name, "pcm-das08");
	dev->node.major = dev->node.minor = 0;
	link->dev_node = &dev->node;

	/* Finally, report what we've done */
	printk(KERN_INFO "%s: index 0x%02x",
		dev->node.dev_name, link->conf.ConfigIndex);
	if (link->conf.Attributes & CONF_ENABLE_IRQ)
		printk(", irq %u", link->irq.AssignedIRQ);
	if (link->io.NumPorts1)
		printk(", io 0x%04x-0x%04x", link->io.BasePort1,
			link->io.BasePort1 + link->io.NumPorts1 - 1);
	if (link->io.NumPorts2)
		printk(" & 0x%04x-0x%04x", link->io.BasePort2,
			link->io.BasePort2 + link->io.NumPorts2 - 1);
	printk("\n");

	return;

      cs_failed:
	cs_error(link, last_fn, last_ret);
	das08_pcmcia_release(link);

}				/* das08_pcmcia_config */

/*======================================================================

    After a card is removed, das08_pcmcia_release() will unregister the
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.

======================================================================*/

static void das08_pcmcia_release(struct pcmcia_device *link)
{
	DEBUG(0, "das08_pcmcia_release(0x%p)\n", link);
	pcmcia_disable_device(link);
}				/* das08_pcmcia_release */

/*======================================================================

    The card status event handler.  Mostly, this schedules other
    stuff to run after an event is received.

    When a CARD_REMOVAL event is received, we immediately set a
    private flag to block future accesses to this device.  All the
    functions that actually access the device should check this flag
    to make sure the card is still present.

======================================================================*/

static int das08_pcmcia_suspend(struct pcmcia_device *link)
{
	local_info_t *local = link->priv;
	/* Mark the device as stopped, to block IO until later */
	local->stop = 1;

	return 0;
}				/* das08_pcmcia_suspend */

static int das08_pcmcia_resume(struct pcmcia_device *link)
{
	local_info_t *local = link->priv;

	local->stop = 0;
	return 0;
}				/* das08_pcmcia_resume */

/*====================================================================*/

static struct pcmcia_device_id das08_cs_id_table[] = {
	PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
	PCMCIA_DEVICE_NULL
};

MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);

struct pcmcia_driver das08_cs_driver = {
	.probe = das08_pcmcia_attach,
	.remove = das08_pcmcia_detach,
	.suspend = das08_pcmcia_suspend,
	.resume = das08_pcmcia_resume,
	.id_table = das08_cs_id_table,
	.owner = THIS_MODULE,
	.drv = {
			.name = dev_info,
		},
};

static int __init init_das08_pcmcia_cs(void)
{
	DEBUG(0, "%s\n", version);
	pcmcia_register_driver(&das08_cs_driver);
	return 0;
}

static void __exit exit_das08_pcmcia_cs(void)
{
	DEBUG(0, "das08_pcmcia_cs: unloading\n");
	pcmcia_unregister_driver(&das08_cs_driver);
}

static int __init das08_cs_init_module(void)
{
	int ret;

	ret = init_das08_pcmcia_cs();
	if (ret < 0)
		return ret;

	return comedi_driver_register(&driver_das08_cs);
}

static void __exit das08_cs_exit_module(void)
{
	exit_das08_pcmcia_cs();
	comedi_driver_unregister(&driver_das08_cs);
}

MODULE_LICENSE("GPL");
module_init(das08_cs_init_module);
module_exit(das08_cs_exit_module);
Commit	Line	Data
0882eaa6 DS	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/version.h>
	47
	48	#include "das08.h"
	49
	50	// pcmcia includes
	51	#include <pcmcia/cs_types.h>
	52	#include <pcmcia/cs.h>
	53	#include <pcmcia/cistpl.h>
	54	#include <pcmcia/ds.h>
	55
	56	static struct pcmcia_device *cur_dev = NULL;
	57
	58	#define thisboard ((const struct das08_board_struct *)dev->board_ptr)
	59
	60	static int das08_cs_attach(comedi_device * dev, comedi_devconfig * it);
	61
	62	static comedi_driver driver_das08_cs = {
	63	driver_name:"das08_cs",
	64	module:THIS_MODULE,
65	attach:das08_cs_attach,
66	detach:das08_common_detach,
67	board_name:&das08_cs_boards[0].name,
68	num_names:sizeof(das08_cs_boards) /
69	sizeof(struct das08_board_struct),
70	offset:sizeof(struct das08_board_struct),
71	};
72
73	static int das08_cs_attach(comedi_device * dev, comedi_devconfig * it)
74	{
75	int ret;
76	unsigned long iobase;
77	struct pcmcia_device *link = cur_dev; // XXX hack
78
79	if ((ret = alloc_private(dev, sizeof(struct das08_private_struct))) < 0)
80	return ret;
81
82	printk("comedi%d: das08_cs: ", dev->minor);
83	// deal with a pci board
84
85	if (thisboard->bustype == pcmcia) {
86	if (link == NULL) {
87	printk(" no pcmcia cards found\n");
88	return -EIO;
89	}
90	iobase = link->io.BasePort1;
91	} else {
92	printk(" bug! board does not have PCMCIA bustype\n");
93	return -EINVAL;
94	}
95
96	printk("\n");
97
98	return das08_common_attach(dev, iobase);
99	}
100
101	/*======================================================================
102
103	The following pcmcia code for the pcm-das08 is adapted from the
104	dummy_cs.c driver of the Linux PCMCIA Card Services package.
105
106	The initial developer of the original code is David A. Hinds
107	<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
108	are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
109
110	======================================================================*/
111
112	/*
113	All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
114	you do not define PCMCIA_DEBUG at all, all the debug code will be
115	left out. If you compile with PCMCIA_DEBUG=0, the debug code will
116	be present but disabled -- but it can then be enabled for specific
117	modules at load time with a 'pc_debug=#' option to insmod.
118	*/
119
120	#ifdef PCMCIA_DEBUG
121	static int pc_debug = PCMCIA_DEBUG;
122	module_param(pc_debug, int, 0644);
123	#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
124	static const char *version =
125	"das08.c pcmcia code (Frank Hess), modified from dummy_cs.c 1.31 2001/08/24 12:13:13 (David Hinds)";
126	#else
127	#define DEBUG(n, args...)
128	#endif
129
130	/====================================================================/
131	static void das08_pcmcia_config(struct pcmcia_device *link);
132	static void das08_pcmcia_release(struct pcmcia_device *link);
133	static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
134	static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
135
136	/*
137	The attach() and detach() entry points are used to create and destroy
138	"instances" of the driver, where each instance represents everything
139	needed to manage one actual PCMCIA card.
140	*/
141
142	static int das08_pcmcia_attach(struct pcmcia_device *);
143	static void das08_pcmcia_detach(struct pcmcia_device *);
144
145	/*
146	You'll also need to prototype all the functions that will actually
147	be used to talk to your device. See 'memory_cs' for a good example
148	of a fully self-sufficient driver; the other drivers rely more or
149	less on other parts of the kernel.
150	*/
151
152	/*
153	The dev_info variable is the "key" that is used to match up this
154	device driver with appropriate cards, through the card configuration
155	database.
156	*/
157
158	static const dev_info_t dev_info = "pcm-das08";
159
160	typedef struct local_info_t {
161	struct pcmcia_device *link;
162	dev_node_t node;
163	int stop;
164	struct bus_operations *bus;
165	} local_info_t;
166
167	/*======================================================================
168
169	das08_pcmcia_attach() creates an "instance" of the driver, allocating
170	local data structures for one device. The device is registered
171	with Card Services.
172
173	The dev_link structure is initialized, but we don't actually
174	configure the card at this point -- we wait until we receive a
175	card insertion event.
176
177	======================================================================*/
178
179	static int das08_pcmcia_attach(struct pcmcia_device *link)
180	{
181	local_info_t *local;
182
183	DEBUG(0, "das08_pcmcia_attach()\n");
184
185	/* Allocate space for private device-specific data */
186	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
187	if (!local)
188	return -ENOMEM;
189	local->link = link;
190	link->priv = local;
191
192	/* Interrupt setup */
193	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
194	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
195	link->irq.Handler = NULL;
196
197	/*
198	General socket configuration defaults can go here. In this
199	client, we assume very little, and rely on the CIS for almost
200	everything. In most clients, many details (i.e., number, sizes,
201	and attributes of IO windows) are fixed by the nature of the
202	device, and can be hard-wired here.
203	*/
204	link->conf.Attributes = 0;
205	link->conf.IntType = INT_MEMORY_AND_IO;
206
207	cur_dev = link;
208
209	das08_pcmcia_config(link);
210
211	return 0;
212	} /* das08_pcmcia_attach */
213
214	/*======================================================================
215
216	This deletes a driver "instance". The device is de-registered
217	with Card Services. If it has been released, all local data
218	structures are freed. Otherwise, the structures will be freed
219	when the device is released.
220
221	======================================================================*/
222
223	static void das08_pcmcia_detach(struct pcmcia_device *link)
224	{
225
226	DEBUG(0, "das08_pcmcia_detach(0x%p)\n", link);
227
228	if (link->dev_node) {
229	((local_info_t *) link->priv)->stop = 1;
230	das08_pcmcia_release(link);
231	}
232
233	/* This points to the parent local_info_t struct */
234	if (link->priv)
235	kfree(link->priv);
236
237	} /* das08_pcmcia_detach */
238
239	/*======================================================================
240
241	das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
242	is received, to configure the PCMCIA socket, and to make the
243	device available to the system.
244
245	======================================================================*/
246
247	static void das08_pcmcia_config(struct pcmcia_device *link)
248	{
249	local_info_t *dev = link->priv;
250	tuple_t tuple;
251	cisparse_t parse;
252	int last_fn, last_ret;
253	u_char buf[64];
254	cistpl_cftable_entry_t dflt = { 0 };
255
256	DEBUG(0, "das08_pcmcia_config(0x%p)\n", link);
257
258	/*
259	This reads the card's CONFIG tuple to find its configuration
260	registers.
261	*/
262	tuple.DesiredTuple = CISTPL_CONFIG;
263	tuple.Attributes = 0;
264	tuple.TupleData = buf;
265	tuple.TupleDataMax = sizeof(buf);
266	tuple.TupleOffset = 0;
267	last_fn = GetFirstTuple;
268	if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0)
269	goto cs_failed;
270	last_fn = GetTupleData;
271	if ((last_ret = pcmcia_get_tuple_data(link, &tuple)) != 0)
272	goto cs_failed;
273	last_fn = ParseTuple;
274	if ((last_ret = pcmcia_parse_tuple(&tuple, &parse)) != 0)
275	goto cs_failed;
276	link->conf.ConfigBase = parse.config.base;
277	link->conf.Present = parse.config.rmask[0];
278
279	/*
280	In this loop, we scan the CIS for configuration table entries,
281	each of which describes a valid card configuration, including
282	voltage, IO window, memory window, and interrupt settings.
283
284	We make no assumptions about the card to be configured: we use
285	just the information available in the CIS. In an ideal world,
286	this would work for any PCMCIA card, but it requires a complete
287	and accurate CIS. In practice, a driver usually "knows" most of
288	these things without consulting the CIS, and most client drivers
289	will only use the CIS to fill in implementation-defined details.
290	*/
291	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
292	last_fn = GetFirstTuple;
293	if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0)
294	goto cs_failed;
295	while (1) {
296	cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
297	if ((last_ret = pcmcia_get_tuple_data(link, &tuple)) != 0)
298	goto next_entry;
299	if ((last_ret = pcmcia_parse_tuple(&tuple, &parse)) != 0)
300	goto next_entry;
301
302	if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
303	dflt = *cfg;
304	if (cfg->index == 0)
305	goto next_entry;
306	link->conf.ConfigIndex = cfg->index;
307
308	/* Does this card need audio output? */
309	/* if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
310	link->conf.Attributes \|= CONF_ENABLE_SPKR;
311	link->conf.Status = CCSR_AUDIO_ENA;
312	}
313	*/
314	/* Do we need to allocate an interrupt? */
315	if (cfg->irq.IRQInfo1 \|\| dflt.irq.IRQInfo1)
316	link->conf.Attributes \|= CONF_ENABLE_IRQ;
317
318	/* IO window settings */
319	link->io.NumPorts1 = link->io.NumPorts2 = 0;
320	if ((cfg->io.nwin > 0) \|\| (dflt.io.nwin > 0)) {
321	cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
322	link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
323	if (!(io->flags & CISTPL_IO_8BIT))
324	link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
325	if (!(io->flags & CISTPL_IO_16BIT))
326	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
327	link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
328	link->io.BasePort1 = io->win[0].base;
329	link->io.NumPorts1 = io->win[0].len;
330	if (io->nwin > 1) {
331	link->io.Attributes2 = link->io.Attributes1;
332	link->io.BasePort2 = io->win[1].base;
333	link->io.NumPorts2 = io->win[1].len;
334	}
335	/* This reserves IO space but doesn't actually enable it */
336	if (pcmcia_request_io(link, &link->io) != 0)
337	goto next_entry;
338	}
339
340	/* If we got this far, we're cool! */
341	break;
342
343	next_entry:
344	last_fn = GetNextTuple;
345	if ((last_ret = pcmcia_get_next_tuple(link, &tuple)) != 0)
346	goto cs_failed;
347	}
348
349	if (link->conf.Attributes & CONF_ENABLE_IRQ) {
350	last_fn = RequestIRQ;
351	if ((last_ret = pcmcia_request_irq(link, &link->irq)) != 0)
352	goto cs_failed;
353	}
354
355	/*
356	This actually configures the PCMCIA socket -- setting up
357	the I/O windows and the interrupt mapping, and putting the
358	card and host interface into "Memory and IO" mode.
359	*/
360	last_fn = RequestConfiguration;
361	if ((last_ret = pcmcia_request_configuration(link, &link->conf)) != 0)
362	goto cs_failed;
363
364	/*
365	At this point, the dev_node_t structure(s) need to be
366	initialized and arranged in a linked list at link->dev.
367	*/
368	sprintf(dev->node.dev_name, "pcm-das08");
369	dev->node.major = dev->node.minor = 0;
370	link->dev_node = &dev->node;
371
372	/* Finally, report what we've done */
373	printk(KERN_INFO "%s: index 0x%02x",
374	dev->node.dev_name, link->conf.ConfigIndex);
375	if (link->conf.Attributes & CONF_ENABLE_IRQ)
376	printk(", irq %u", link->irq.AssignedIRQ);
377	if (link->io.NumPorts1)
378	printk(", io 0x%04x-0x%04x", link->io.BasePort1,
379	link->io.BasePort1 + link->io.NumPorts1 - 1);
380	if (link->io.NumPorts2)
381	printk(" & 0x%04x-0x%04x", link->io.BasePort2,
382	link->io.BasePort2 + link->io.NumPorts2 - 1);
383	printk("\n");
384
385	return;
386
387	cs_failed:
388	cs_error(link, last_fn, last_ret);
389	das08_pcmcia_release(link);
390
391	} /* das08_pcmcia_config */
392
393	/*======================================================================
394
395	After a card is removed, das08_pcmcia_release() will unregister the
396	device, and release the PCMCIA configuration. If the device is
397	still open, this will be postponed until it is closed.
398
399	======================================================================*/
400
401	static void das08_pcmcia_release(struct pcmcia_device *link)
402	{
403	DEBUG(0, "das08_pcmcia_release(0x%p)\n", link);
404	pcmcia_disable_device(link);
405	} /* das08_pcmcia_release */
406
407	/*======================================================================
408
409	The card status event handler. Mostly, this schedules other
410	stuff to run after an event is received.
411
412	When a CARD_REMOVAL event is received, we immediately set a
413	private flag to block future accesses to this device. All the
414	functions that actually access the device should check this flag
415	to make sure the card is still present.
416
417	======================================================================*/
418
419	static int das08_pcmcia_suspend(struct pcmcia_device *link)
420	{
421	local_info_t *local = link->priv;
422	/* Mark the device as stopped, to block IO until later */
423	local->stop = 1;
424
425	return 0;
426	} /* das08_pcmcia_suspend */
427
428	static int das08_pcmcia_resume(struct pcmcia_device *link)
429	{
430	local_info_t *local = link->priv;
431
432	local->stop = 0;
433	return 0;
434	} /* das08_pcmcia_resume */
435
436	/====================================================================/
437
438	static struct pcmcia_device_id das08_cs_id_table[] = {
439	PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
440	PCMCIA_DEVICE_NULL
441	};
442
443	MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
444
445	struct pcmcia_driver das08_cs_driver = {
446	.probe = das08_pcmcia_attach,
447	.remove = das08_pcmcia_detach,
448	.suspend = das08_pcmcia_suspend,
449	.resume = das08_pcmcia_resume,
450	.id_table = das08_cs_id_table,
451	.owner = THIS_MODULE,
452	.drv = {
453	.name = dev_info,
454	},
455	};
456
457	static int __init init_das08_pcmcia_cs(void)
458	{
459	DEBUG(0, "%s\n", version);
460	pcmcia_register_driver(&das08_cs_driver);
461	return 0;
462	}
463
464	static void __exit exit_das08_pcmcia_cs(void)
465	{
466	DEBUG(0, "das08_pcmcia_cs: unloading\n");
467	pcmcia_unregister_driver(&das08_cs_driver);
468	}
469
470	static int __init das08_cs_init_module(void)
471	{
472	int ret;
473
474	ret = init_das08_pcmcia_cs();
475	if (ret < 0)
476	return ret;
477
478	return comedi_driver_register(&driver_das08_cs);
479	}
480
481	static void __exit das08_cs_exit_module(void)
482	{
483	exit_das08_pcmcia_cs();
484	comedi_driver_unregister(&driver_das08_cs);
485	}
486
487	MODULE_LICENSE("GPL");
488	module_init(das08_cs_init_module);
489	module_exit(das08_cs_exit_module);