[people/arne_f/kernel.git] / drivers / char / pcmcia / cm4040_cs.c

/*
 * A driver for the Omnikey PCMCIA smartcard reader CardMan 4040
 *
 * (c) 2000-2004 Omnikey AG (http://www.omnikey.com/)
 *
 * (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
 * 	- add support for poll()
 * 	- driver cleanup
 * 	- add waitqueues
 * 	- adhere to linux kernel coding style and policies
 * 	- support 2.6.13 "new style" pcmcia interface
 * 	- add class interface for udev device creation
 *
 * The device basically is a USB CCID compliant device that has been
 * attached to an I/O-Mapped FIFO.
 *
 * All rights reserved, Dual BSD/GPL Licensed.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/poll.h>
#include <linux/smp_lock.h>
#include <linux/wait.h>
#include <asm/uaccess.h>
#include <asm/io.h>

#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>

#include "cm4040_cs.h"


#define reader_to_dev(x)	(&x->p_dev->dev)

/* n (debug level) is ignored */
/* additional debug output may be enabled by re-compiling with
 * CM4040_DEBUG set */
/* #define CM4040_DEBUG */
#define DEBUGP(n, rdr, x, args...) do { 		\
		dev_dbg(reader_to_dev(rdr), "%s:" x, 	\
			   __func__ , ## args);		\
	} while (0)

static char *version =
"OMNIKEY CardMan 4040 v1.1.0gm5 - All bugs added by Harald Welte";

#define	CCID_DRIVER_BULK_DEFAULT_TIMEOUT  	(150*HZ)
#define	CCID_DRIVER_ASYNC_POWERUP_TIMEOUT 	(35*HZ)
#define	CCID_DRIVER_MINIMUM_TIMEOUT 		(3*HZ)
#define READ_WRITE_BUFFER_SIZE 512
#define POLL_LOOP_COUNT				1000

/* how often to poll for fifo status change */
#define POLL_PERIOD 				msecs_to_jiffies(10)

static void reader_release(struct pcmcia_device *link);

static int major;
static struct class *cmx_class;

#define		BS_READABLE	0x01
#define		BS_WRITABLE	0x02

struct reader_dev {
	struct pcmcia_device	*p_dev;
	wait_queue_head_t	devq;
	wait_queue_head_t	poll_wait;
	wait_queue_head_t	read_wait;
	wait_queue_head_t	write_wait;
	unsigned long 	  	buffer_status;
	unsigned long     	timeout;
	unsigned char     	s_buf[READ_WRITE_BUFFER_SIZE];
	unsigned char     	r_buf[READ_WRITE_BUFFER_SIZE];
	struct timer_list 	poll_timer;
};

static struct pcmcia_device *dev_table[CM_MAX_DEV];

#ifndef CM4040_DEBUG
#define	xoutb	outb
#define	xinb	inb
#else
static inline void xoutb(unsigned char val, unsigned short port)
{
	pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
	outb(val, port);
}

static inline unsigned char xinb(unsigned short port)
{
	unsigned char val;

	val = inb(port);
	pr_debug("%.2x=inb(%.4x)\n", val, port);
	return val;
}
#endif

/* poll the device fifo status register.  not to be confused with
 * the poll syscall. */
static void cm4040_do_poll(unsigned long dummy)
{
	struct reader_dev *dev = (struct reader_dev *) dummy;
	unsigned int obs = xinb(dev->p_dev->resource[0]->start
				+ REG_OFFSET_BUFFER_STATUS);

	if ((obs & BSR_BULK_IN_FULL)) {
		set_bit(BS_READABLE, &dev->buffer_status);
		DEBUGP(4, dev, "waking up read_wait\n");
		wake_up_interruptible(&dev->read_wait);
	} else
		clear_bit(BS_READABLE, &dev->buffer_status);

	if (!(obs & BSR_BULK_OUT_FULL)) {
		set_bit(BS_WRITABLE, &dev->buffer_status);
		DEBUGP(4, dev, "waking up write_wait\n");
		wake_up_interruptible(&dev->write_wait);
	} else
		clear_bit(BS_WRITABLE, &dev->buffer_status);

	if (dev->buffer_status)
		wake_up_interruptible(&dev->poll_wait);

	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
}

static void cm4040_stop_poll(struct reader_dev *dev)
{
	del_timer_sync(&dev->poll_timer);
}

static int wait_for_bulk_out_ready(struct reader_dev *dev)
{
	int i, rc;
	int iobase = dev->p_dev->resource[0]->start;

	for (i = 0; i < POLL_LOOP_COUNT; i++) {
		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
		    & BSR_BULK_OUT_FULL) == 0) {
			DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
			return 1;
		}
	}

	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
		dev->timeout);
	rc = wait_event_interruptible_timeout(dev->write_wait,
					      test_and_clear_bit(BS_WRITABLE,
						       &dev->buffer_status),
					      dev->timeout);

	if (rc > 0)
		DEBUGP(4, dev, "woke up: BulkOut empty\n");
	else if (rc == 0)
		DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
	else if (rc < 0)
		DEBUGP(4, dev, "woke up: signal arrived\n");

	return rc;
}

/* Write to Sync Control Register */
static int write_sync_reg(unsigned char val, struct reader_dev *dev)
{
	int iobase = dev->p_dev->resource[0]->start;
	int rc;

	rc = wait_for_bulk_out_ready(dev);
	if (rc <= 0)
		return rc;

	xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
	rc = wait_for_bulk_out_ready(dev);
	if (rc <= 0)
		return rc;

	return 1;
}

static int wait_for_bulk_in_ready(struct reader_dev *dev)
{
	int i, rc;
	int iobase = dev->p_dev->resource[0]->start;

	for (i = 0; i < POLL_LOOP_COUNT; i++) {
		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
		    & BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
			DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
			return 1;
		}
	}

	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
		dev->timeout);
	rc = wait_event_interruptible_timeout(dev->read_wait,
					      test_and_clear_bit(BS_READABLE,
						 	&dev->buffer_status),
					      dev->timeout);
	if (rc > 0)
		DEBUGP(4, dev, "woke up: BulkIn full\n");
	else if (rc == 0)
		DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
	else if (rc < 0)
		DEBUGP(4, dev, "woke up: signal arrived\n");

	return rc;
}

static ssize_t cm4040_read(struct file *filp, char __user *buf,
			size_t count, loff_t *ppos)
{
	struct reader_dev *dev = filp->private_data;
	int iobase = dev->p_dev->resource[0]->start;
	size_t bytes_to_read;
	unsigned long i;
	size_t min_bytes_to_read;
	int rc;
	unsigned char uc;

	DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);

	if (count == 0)
		return 0;

	if (count < 10)
		return -EFAULT;

	if (filp->f_flags & O_NONBLOCK) {
		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
		DEBUGP(2, dev, "<- cm4040_read (failure)\n");
		return -EAGAIN;
	}

	if (!pcmcia_dev_present(dev->p_dev))
		return -ENODEV;

	for (i = 0; i < 5; i++) {
		rc = wait_for_bulk_in_ready(dev);
		if (rc <= 0) {
			DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
			DEBUGP(2, dev, "<- cm4040_read (failed)\n");
			if (rc == -ERESTARTSYS)
				return rc;
			return -EIO;
		}
	  	dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
#ifdef CM4040_DEBUG
		pr_debug("%lu:%2x ", i, dev->r_buf[i]);
	}
	pr_debug("\n");
#else
	}
#endif

	bytes_to_read = 5 + le32_to_cpu(*(__le32 *)&dev->r_buf[1]);

	DEBUGP(6, dev, "BytesToRead=%zu\n", bytes_to_read);

	min_bytes_to_read = min(count, bytes_to_read + 5);
	min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);

	DEBUGP(6, dev, "Min=%zu\n", min_bytes_to_read);

	for (i = 0; i < (min_bytes_to_read-5); i++) {
		rc = wait_for_bulk_in_ready(dev);
		if (rc <= 0) {
			DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
			DEBUGP(2, dev, "<- cm4040_read (failed)\n");
			if (rc == -ERESTARTSYS)
				return rc;
			return -EIO;
		}
		dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
#ifdef CM4040_DEBUG
		pr_debug("%lu:%2x ", i, dev->r_buf[i]);
	}
	pr_debug("\n");
#else
	}
#endif

	*ppos = min_bytes_to_read;
	if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
		return -EFAULT;

	rc = wait_for_bulk_in_ready(dev);
	if (rc <= 0) {
		DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
		DEBUGP(2, dev, "<- cm4040_read (failed)\n");
		if (rc == -ERESTARTSYS)
			return rc;
		return -EIO;
	}

	rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
	if (rc <= 0) {
		DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
		DEBUGP(2, dev, "<- cm4040_read (failed)\n");
		if (rc == -ERESTARTSYS)
			return rc;
		else
			return -EIO;
	}

	uc = xinb(iobase + REG_OFFSET_BULK_IN);

	DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
	return min_bytes_to_read;
}

static ssize_t cm4040_write(struct file *filp, const char __user *buf,
			 size_t count, loff_t *ppos)
{
	struct reader_dev *dev = filp->private_data;
	int iobase = dev->p_dev->resource[0]->start;
	ssize_t rc;
	int i;
	unsigned int bytes_to_write;

	DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);

	if (count == 0) {
		DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
		return 0;
	}

	if ((count < 5) || (count > READ_WRITE_BUFFER_SIZE)) {
		DEBUGP(2, dev, "<- cm4040_write buffersize=%Zd < 5\n", count);
		return -EIO;
	}

	if (filp->f_flags & O_NONBLOCK) {
		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
		DEBUGP(4, dev, "<- cm4040_write (failure)\n");
		return -EAGAIN;
	}

	if (!pcmcia_dev_present(dev->p_dev))
		return -ENODEV;

	bytes_to_write = count;
	if (copy_from_user(dev->s_buf, buf, bytes_to_write))
		return -EFAULT;

	switch (dev->s_buf[0]) {
		case CMD_PC_TO_RDR_XFRBLOCK:
		case CMD_PC_TO_RDR_SECURE:
		case CMD_PC_TO_RDR_TEST_SECURE:
		case CMD_PC_TO_RDR_OK_SECURE:
			dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
			break;

		case CMD_PC_TO_RDR_ICCPOWERON:
			dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
			break;

		case CMD_PC_TO_RDR_GETSLOTSTATUS:
		case CMD_PC_TO_RDR_ICCPOWEROFF:
		case CMD_PC_TO_RDR_GETPARAMETERS:
		case CMD_PC_TO_RDR_RESETPARAMETERS:
		case CMD_PC_TO_RDR_SETPARAMETERS:
		case CMD_PC_TO_RDR_ESCAPE:
		case CMD_PC_TO_RDR_ICCCLOCK:
		default:
			dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
			break;
	}

	rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
	if (rc <= 0) {
		DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
		DEBUGP(2, dev, "<- cm4040_write (failed)\n");
		if (rc == -ERESTARTSYS)
			return rc;
		else
			return -EIO;
	}

	DEBUGP(4, dev, "start \n");

	for (i = 0; i < bytes_to_write; i++) {
		rc = wait_for_bulk_out_ready(dev);
		if (rc <= 0) {
			DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2Zx\n",
			       rc);
			DEBUGP(2, dev, "<- cm4040_write (failed)\n");
			if (rc == -ERESTARTSYS)
				return rc;
			else
				return -EIO;
		}

		xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
	}
	DEBUGP(4, dev, "end\n");

	rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);

	if (rc <= 0) {
		DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
		DEBUGP(2, dev, "<- cm4040_write (failed)\n");
		if (rc == -ERESTARTSYS)
			return rc;
		else
			return -EIO;
	}

	DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
	return count;
}

static unsigned int cm4040_poll(struct file *filp, poll_table *wait)
{
	struct reader_dev *dev = filp->private_data;
	unsigned int mask = 0;

	poll_wait(filp, &dev->poll_wait, wait);

	if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
		mask |= POLLIN | POLLRDNORM;
	if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
		mask |= POLLOUT | POLLWRNORM;

	DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);

	return mask;
}

static int cm4040_open(struct inode *inode, struct file *filp)
{
	struct reader_dev *dev;
	struct pcmcia_device *link;
	int minor = iminor(inode);
	int ret;

	if (minor >= CM_MAX_DEV)
		return -ENODEV;

	lock_kernel();
	link = dev_table[minor];
	if (link == NULL || !pcmcia_dev_present(link)) {
		ret = -ENODEV;
		goto out;
	}

	if (link->open) {
		ret = -EBUSY;
		goto out;
	}

	dev = link->priv;
	filp->private_data = dev;

	if (filp->f_flags & O_NONBLOCK) {
		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
		ret = -EAGAIN;
		goto out;
	}

	link->open = 1;

	dev->poll_timer.data = (unsigned long) dev;
	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);

	DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
	ret = nonseekable_open(inode, filp);
out:
	unlock_kernel();
	return ret;
}

static int cm4040_close(struct inode *inode, struct file *filp)
{
	struct reader_dev *dev = filp->private_data;
	struct pcmcia_device *link;
	int minor = iminor(inode);

	DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
	      iminor(inode));

	if (minor >= CM_MAX_DEV)
		return -ENODEV;

	link = dev_table[minor];
	if (link == NULL)
		return -ENODEV;

	cm4040_stop_poll(dev);

	link->open = 0;
	wake_up(&dev->devq);

	DEBUGP(2, dev, "<- cm4040_close\n");
	return 0;
}

static void cm4040_reader_release(struct pcmcia_device *link)
{
	struct reader_dev *dev = link->priv;

	DEBUGP(3, dev, "-> cm4040_reader_release\n");
	while (link->open) {
		DEBUGP(3, dev, KERN_INFO MODULE_NAME ": delaying release "
		       "until process has terminated\n");
 		wait_event(dev->devq, (link->open == 0));
	}
	DEBUGP(3, dev, "<- cm4040_reader_release\n");
	return;
}

static int cm4040_config_check(struct pcmcia_device *p_dev,
			       cistpl_cftable_entry_t *cfg,
			       cistpl_cftable_entry_t *dflt,
			       unsigned int vcc,
			       void *priv_data)
{
	int rc;
	if (!cfg->io.nwin)
		return -ENODEV;

	/* Get the IOaddr */
	p_dev->resource[0]->start = cfg->io.win[0].base;
	p_dev->resource[0]->end = cfg->io.win[0].len;
	p_dev->resource[0]->flags |= pcmcia_io_cfg_data_width(cfg->io.flags);
	p_dev->io_lines = cfg->io.flags & CISTPL_IO_LINES_MASK;
	rc = pcmcia_request_io(p_dev);

	dev_printk(KERN_INFO, &p_dev->dev,
		   "pcmcia_request_io returned 0x%x\n", rc);
	return rc;
}


static int reader_config(struct pcmcia_device *link, int devno)
{
	struct reader_dev *dev;
	int fail_rc;

	if (pcmcia_loop_config(link, cm4040_config_check, NULL))
		goto cs_release;

	link->conf.IntType = 00000002;

	fail_rc = pcmcia_request_configuration(link, &link->conf);
	if (fail_rc != 0) {
		dev_printk(KERN_INFO, &link->dev,
			   "pcmcia_request_configuration failed 0x%x\n",
			   fail_rc);
		goto cs_release;
	}

	dev = link->priv;

	DEBUGP(2, dev, "device " DEVICE_NAME "%d at %pR\n", devno,
	      link->resource[0]);
	DEBUGP(2, dev, "<- reader_config (succ)\n");

	return 0;

cs_release:
	reader_release(link);
	return -ENODEV;
}

static void reader_release(struct pcmcia_device *link)
{
	cm4040_reader_release(link);
	pcmcia_disable_device(link);
}

static int reader_probe(struct pcmcia_device *link)
{
	struct reader_dev *dev;
	int i, ret;

	for (i = 0; i < CM_MAX_DEV; i++) {
		if (dev_table[i] == NULL)
			break;
	}

	if (i == CM_MAX_DEV)
		return -ENODEV;

	dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
	if (dev == NULL)
		return -ENOMEM;

	dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
	dev->buffer_status = 0;

	link->priv = dev;
	dev->p_dev = link;

	link->conf.IntType = INT_MEMORY_AND_IO;
	dev_table[i] = link;

	init_waitqueue_head(&dev->devq);
	init_waitqueue_head(&dev->poll_wait);
	init_waitqueue_head(&dev->read_wait);
	init_waitqueue_head(&dev->write_wait);
	setup_timer(&dev->poll_timer, cm4040_do_poll, 0);

	ret = reader_config(link, i);
	if (ret) {
		dev_table[i] = NULL;
		kfree(dev);
		return ret;
	}

	device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);

	return 0;
}

static void reader_detach(struct pcmcia_device *link)
{
	struct reader_dev *dev = link->priv;
	int devno;

	/* find device */
	for (devno = 0; devno < CM_MAX_DEV; devno++) {
		if (dev_table[devno] == link)
			break;
	}
	if (devno == CM_MAX_DEV)
		return;

	reader_release(link);

	dev_table[devno] = NULL;
	kfree(dev);

	device_destroy(cmx_class, MKDEV(major, devno));

	return;
}

static const struct file_operations reader_fops = {
	.owner		= THIS_MODULE,
	.read		= cm4040_read,
	.write		= cm4040_write,
	.open		= cm4040_open,
	.release	= cm4040_close,
	.poll		= cm4040_poll,
	.llseek		= no_llseek,
};

static struct pcmcia_device_id cm4040_ids[] = {
	PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
	PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
				0xE32CDD8C, 0x8F23318B),
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);

static struct pcmcia_driver reader_driver = {
  	.owner		= THIS_MODULE,
  	.drv		= {
		.name	= "cm4040_cs",
	},
	.probe		= reader_probe,
	.remove		= reader_detach,
	.id_table	= cm4040_ids,
};

static int __init cm4040_init(void)
{
	int rc;

	printk(KERN_INFO "%s\n", version);
	cmx_class = class_create(THIS_MODULE, "cardman_4040");
	if (IS_ERR(cmx_class))
		return PTR_ERR(cmx_class);

	major = register_chrdev(0, DEVICE_NAME, &reader_fops);
	if (major < 0) {
		printk(KERN_WARNING MODULE_NAME
			": could not get major number\n");
		class_destroy(cmx_class);
		return major;
	}

	rc = pcmcia_register_driver(&reader_driver);
	if (rc < 0) {
		unregister_chrdev(major, DEVICE_NAME);
		class_destroy(cmx_class);
		return rc;
	}

	return 0;
}

static void __exit cm4040_exit(void)
{
	printk(KERN_INFO MODULE_NAME ": unloading\n");
	pcmcia_unregister_driver(&reader_driver);
	unregister_chrdev(major, DEVICE_NAME);
	class_destroy(cmx_class);
}

module_init(cm4040_init);
module_exit(cm4040_exit);
MODULE_LICENSE("Dual BSD/GPL");
Commit	Line	Data
77c44ab1 HW	1	/*
	2	* A driver for the Omnikey PCMCIA smartcard reader CardMan 4040
	3	*
	4	* (c) 2000-2004 Omnikey AG (http://www.omnikey.com/)
	5	*
67bc6200	6	* (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
77c44ab1 HW	7	* - add support for poll()
	8	* - driver cleanup
	9	* - add waitqueues
	10	* - adhere to linux kernel coding style and policies
	11	* - support 2.6.13 "new style" pcmcia interface
67bc6200	12	* - add class interface for udev device creation
77c44ab1 HW	13	*
	14	* The device basically is a USB CCID compliant device that has been
	15	* attached to an I/O-Mapped FIFO.
	16	*
	17	* All rights reserved, Dual BSD/GPL Licensed.
	18	*/
	19
77c44ab1 HW	20	#include <linux/kernel.h>
	21	#include <linux/module.h>
	22	#include <linux/slab.h>
	23	#include <linux/init.h>
	24	#include <linux/fs.h>
	25	#include <linux/delay.h>
	26	#include <linux/poll.h>
8b5332f6	27	#include <linux/smp_lock.h>
77c44ab1 HW	28	#include <linux/wait.h>
	29	#include <asm/uaccess.h>
	30	#include <asm/io.h>
	31
77c44ab1 HW	32	#include <pcmcia/cs.h>
	33	#include <pcmcia/cistpl.h>
	34	#include <pcmcia/cisreg.h>
	35	#include <pcmcia/ciscode.h>
	36	#include <pcmcia/ds.h>
	37
	38	#include "cm4040_cs.h"
	39
	40
dd2e5a15	41	#define reader_to_dev(x) (&x->p_dev->dev)
cbf624f0 DB	42
	43	/* n (debug level) is ignored */
	44	/* additional debug output may be enabled by re-compiling with
	45	* CM4040_DEBUG set */
	46	/* #define CM4040_DEBUG */
	47	#define DEBUGP(n, rdr, x, args...) do { \
	48	dev_dbg(reader_to_dev(rdr), "%s:" x, \
	49	__func__ , ## args); \
77c44ab1	50	} while (0)
77c44ab1 HW	51
77c44ab1 HW	52	static char *version =
67bc6200	53	"OMNIKEY CardMan 4040 v1.1.0gm5 - All bugs added by Harald Welte";
77c44ab1 HW	54
	55	#define CCID_DRIVER_BULK_DEFAULT_TIMEOUT (150*HZ)
	56	#define CCID_DRIVER_ASYNC_POWERUP_TIMEOUT (35*HZ)
	57	#define CCID_DRIVER_MINIMUM_TIMEOUT (3*HZ)
	58	#define READ_WRITE_BUFFER_SIZE 512
	59	#define POLL_LOOP_COUNT 1000
	60
	61	/* how often to poll for fifo status change */
	62	#define POLL_PERIOD msecs_to_jiffies(10)
	63
fba395ee	64	static void reader_release(struct pcmcia_device *link);
77c44ab1 HW	65
77c44ab1 HW	66	static int major;
67bc6200	67	static struct class *cmx_class;
77c44ab1 HW	68
	69	#define BS_READABLE 0x01
	70	#define BS_WRITABLE 0x02
	71
	72	struct reader_dev {
fd238232	73	struct pcmcia_device *p_dev;
77c44ab1 HW	74	wait_queue_head_t devq;
	75	wait_queue_head_t poll_wait;
	76	wait_queue_head_t read_wait;
	77	wait_queue_head_t write_wait;
	78	unsigned long buffer_status;
	79	unsigned long timeout;
	80	unsigned char s_buf[READ_WRITE_BUFFER_SIZE];
	81	unsigned char r_buf[READ_WRITE_BUFFER_SIZE];
	82	struct timer_list poll_timer;
	83	};
	84
fba395ee	85	static struct pcmcia_device *dev_table[CM_MAX_DEV];
77c44ab1	86
cbf624f0	87	#ifndef CM4040_DEBUG
77c44ab1 HW	88	#define xoutb outb
	89	#define xinb inb
	90	#else
	91	static inline void xoutb(unsigned char val, unsigned short port)
	92	{
cbf624f0	93	pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
77c44ab1 HW	94	outb(val, port);
	95	}
	96
	97	static inline unsigned char xinb(unsigned short port)
	98	{
	99	unsigned char val;
	100
	101	val = inb(port);
cbf624f0	102	pr_debug("%.2x=inb(%.4x)\n", val, port);
77c44ab1 HW	103	return val;
	104	}
	105	#endif
	106
	107	/* poll the device fifo status register. not to be confused with
	108	* the poll syscall. */
	109	static void cm4040_do_poll(unsigned long dummy)
	110	{
	111	struct reader_dev dev = (struct reader_dev ) dummy;
9a017a91	112	unsigned int obs = xinb(dev->p_dev->resource[0]->start
77c44ab1 HW	113	+ REG_OFFSET_BUFFER_STATUS);
	114
	115	if ((obs & BSR_BULK_IN_FULL)) {
	116	set_bit(BS_READABLE, &dev->buffer_status);
	117	DEBUGP(4, dev, "waking up read_wait\n");
	118	wake_up_interruptible(&dev->read_wait);
	119	} else
	120	clear_bit(BS_READABLE, &dev->buffer_status);
	121
	122	if (!(obs & BSR_BULK_OUT_FULL)) {
	123	set_bit(BS_WRITABLE, &dev->buffer_status);
	124	DEBUGP(4, dev, "waking up write_wait\n");
	125	wake_up_interruptible(&dev->write_wait);
	126	} else
	127	clear_bit(BS_WRITABLE, &dev->buffer_status);
	128
	129	if (dev->buffer_status)
	130	wake_up_interruptible(&dev->poll_wait);
	131
	132	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
	133	}
	134
	135	static void cm4040_stop_poll(struct reader_dev *dev)
	136	{
	137	del_timer_sync(&dev->poll_timer);
	138	}
	139
	140	static int wait_for_bulk_out_ready(struct reader_dev *dev)
	141	{
	142	int i, rc;
9a017a91	143	int iobase = dev->p_dev->resource[0]->start;
77c44ab1 HW	144
	145	for (i = 0; i < POLL_LOOP_COUNT; i++) {
	146	if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
	147	& BSR_BULK_OUT_FULL) == 0) {
	148	DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
	149	return 1;
	150	}
	151	}
	152
	153	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
	154	dev->timeout);
	155	rc = wait_event_interruptible_timeout(dev->write_wait,
	156	test_and_clear_bit(BS_WRITABLE,
	157	&dev->buffer_status),
	158	dev->timeout);
	159
	160	if (rc > 0)
	161	DEBUGP(4, dev, "woke up: BulkOut empty\n");
	162	else if (rc == 0)
	163	DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
	164	else if (rc < 0)
	165	DEBUGP(4, dev, "woke up: signal arrived\n");
	166
	167	return rc;
	168	}
	169
	170	/* Write to Sync Control Register */
	171	static int write_sync_reg(unsigned char val, struct reader_dev *dev)
	172	{
9a017a91	173	int iobase = dev->p_dev->resource[0]->start;
77c44ab1 HW	174	int rc;
	175
	176	rc = wait_for_bulk_out_ready(dev);
	177	if (rc <= 0)
	178	return rc;
	179
	180	xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
	181	rc = wait_for_bulk_out_ready(dev);
	182	if (rc <= 0)
	183	return rc;
	184
	185	return 1;
	186	}
	187
	188	static int wait_for_bulk_in_ready(struct reader_dev *dev)
	189	{
	190	int i, rc;
9a017a91	191	int iobase = dev->p_dev->resource[0]->start;
77c44ab1 HW	192
	193	for (i = 0; i < POLL_LOOP_COUNT; i++) {
	194	if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
	195	& BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
	196	DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
	197	return 1;
	198	}
	199	}
	200
	201	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
	202	dev->timeout);
	203	rc = wait_event_interruptible_timeout(dev->read_wait,
	204	test_and_clear_bit(BS_READABLE,
	205	&dev->buffer_status),
	206	dev->timeout);
	207	if (rc > 0)
	208	DEBUGP(4, dev, "woke up: BulkIn full\n");
	209	else if (rc == 0)
	210	DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
	211	else if (rc < 0)
	212	DEBUGP(4, dev, "woke up: signal arrived\n");
	213
	214	return rc;
	215	}
	216
	217	static ssize_t cm4040_read(struct file filp, char __user buf,
	218	size_t count, loff_t *ppos)
	219	{
	220	struct reader_dev *dev = filp->private_data;
9a017a91	221	int iobase = dev->p_dev->resource[0]->start;
77c44ab1 HW	222	size_t bytes_to_read;
	223	unsigned long i;
	224	size_t min_bytes_to_read;
	225	int rc;
	226	unsigned char uc;
	227
	228	DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
	229
	230	if (count == 0)
	231	return 0;
	232
	233	if (count < 10)
	234	return -EFAULT;
	235
	236	if (filp->f_flags & O_NONBLOCK) {
	237	DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
	238	DEBUGP(2, dev, "<- cm4040_read (failure)\n");
	239	return -EAGAIN;
	240	}
	241
e2d40963	242	if (!pcmcia_dev_present(dev->p_dev))
77c44ab1 HW	243	return -ENODEV;
	244
	245	for (i = 0; i < 5; i++) {
	246	rc = wait_for_bulk_in_ready(dev);
	247	if (rc <= 0) {
	248	DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
	249	DEBUGP(2, dev, "<- cm4040_read (failed)\n");
	250	if (rc == -ERESTARTSYS)
	251	return rc;
	252	return -EIO;
	253	}
	254	dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
cbf624f0 DB	255	#ifdef CM4040_DEBUG
cbf624f0 DB	256	pr_debug("%lu:%2x ", i, dev->r_buf[i]);
77c44ab1	257	}
cbf624f0	258	pr_debug("\n");
77c44ab1 HW	259	#else
	260	}
	261	#endif
	262
	263	bytes_to_read = 5 + le32_to_cpu((__le32 )&dev->r_buf[1]);
	264
e657ea17	265	DEBUGP(6, dev, "BytesToRead=%zu\n", bytes_to_read);
77c44ab1 HW	266
77c44ab1 HW	267	min_bytes_to_read = min(count, bytes_to_read + 5);
059819a4	268	min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);
77c44ab1	269
e657ea17	270	DEBUGP(6, dev, "Min=%zu\n", min_bytes_to_read);
77c44ab1 HW	271
	272	for (i = 0; i < (min_bytes_to_read-5); i++) {
	273	rc = wait_for_bulk_in_ready(dev);
	274	if (rc <= 0) {
	275	DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
	276	DEBUGP(2, dev, "<- cm4040_read (failed)\n");
	277	if (rc == -ERESTARTSYS)
	278	return rc;
	279	return -EIO;
	280	}
	281	dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
cbf624f0 DB	282	#ifdef CM4040_DEBUG
cbf624f0 DB	283	pr_debug("%lu:%2x ", i, dev->r_buf[i]);
77c44ab1	284	}
cbf624f0	285	pr_debug("\n");
77c44ab1 HW	286	#else
	287	}
	288	#endif
	289
	290	*ppos = min_bytes_to_read;
	291	if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
	292	return -EFAULT;
	293
	294	rc = wait_for_bulk_in_ready(dev);
	295	if (rc <= 0) {
	296	DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
	297	DEBUGP(2, dev, "<- cm4040_read (failed)\n");
	298	if (rc == -ERESTARTSYS)
	299	return rc;
	300	return -EIO;
	301	}
	302
	303	rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
	304	if (rc <= 0) {
	305	DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
	306	DEBUGP(2, dev, "<- cm4040_read (failed)\n");
	307	if (rc == -ERESTARTSYS)
	308	return rc;
	309	else
	310	return -EIO;
	311	}
	312
	313	uc = xinb(iobase + REG_OFFSET_BULK_IN);
	314
	315	DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
	316	return min_bytes_to_read;
	317	}
	318
	319	static ssize_t cm4040_write(struct file filp, const char __user buf,
	320	size_t count, loff_t *ppos)
	321	{
	322	struct reader_dev *dev = filp->private_data;
9a017a91	323	int iobase = dev->p_dev->resource[0]->start;
77c44ab1 HW	324	ssize_t rc;
	325	int i;
	326	unsigned int bytes_to_write;
	327
	328	DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
	329
	330	if (count == 0) {
	331	DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
	332	return 0;
	333	}
	334
059819a4	335	if ((count < 5) \|\| (count > READ_WRITE_BUFFER_SIZE)) {
77c44ab1 HW	336	DEBUGP(2, dev, "<- cm4040_write buffersize=%Zd < 5\n", count);
	337	return -EIO;
	338	}
	339
	340	if (filp->f_flags & O_NONBLOCK) {
	341	DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
	342	DEBUGP(4, dev, "<- cm4040_write (failure)\n");
	343	return -EAGAIN;
	344	}
	345
e2d40963	346	if (!pcmcia_dev_present(dev->p_dev))
77c44ab1 HW	347	return -ENODEV;
	348
	349	bytes_to_write = count;
	350	if (copy_from_user(dev->s_buf, buf, bytes_to_write))
	351	return -EFAULT;
	352
	353	switch (dev->s_buf[0]) {
	354	case CMD_PC_TO_RDR_XFRBLOCK:
	355	case CMD_PC_TO_RDR_SECURE:
	356	case CMD_PC_TO_RDR_TEST_SECURE:
	357	case CMD_PC_TO_RDR_OK_SECURE:
	358	dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
	359	break;
	360
	361	case CMD_PC_TO_RDR_ICCPOWERON:
	362	dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
	363	break;
	364
	365	case CMD_PC_TO_RDR_GETSLOTSTATUS:
	366	case CMD_PC_TO_RDR_ICCPOWEROFF:
	367	case CMD_PC_TO_RDR_GETPARAMETERS:
	368	case CMD_PC_TO_RDR_RESETPARAMETERS:
	369	case CMD_PC_TO_RDR_SETPARAMETERS:
	370	case CMD_PC_TO_RDR_ESCAPE:
	371	case CMD_PC_TO_RDR_ICCCLOCK:
	372	default:
	373	dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
	374	break;
	375	}
	376
	377	rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
	378	if (rc <= 0) {
	379	DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
	380	DEBUGP(2, dev, "<- cm4040_write (failed)\n");
	381	if (rc == -ERESTARTSYS)
	382	return rc;
	383	else
	384	return -EIO;
	385	}
	386
	387	DEBUGP(4, dev, "start \n");
	388
	389	for (i = 0; i < bytes_to_write; i++) {
	390	rc = wait_for_bulk_out_ready(dev);
	391	if (rc <= 0) {
	392	DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2Zx\n",
	393	rc);
	394	DEBUGP(2, dev, "<- cm4040_write (failed)\n");
	395	if (rc == -ERESTARTSYS)
	396	return rc;
	397	else
	398	return -EIO;
	399	}
	400
	401	xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
	402	}
	403	DEBUGP(4, dev, "end\n");
	404
	405	rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
	406
	407	if (rc <= 0) {
	408	DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
	409	DEBUGP(2, dev, "<- cm4040_write (failed)\n");
	410	if (rc == -ERESTARTSYS)
411	return rc;
412	else
413	return -EIO;
414	}
415
416	DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
417	return count;
418	}
419
420	static unsigned int cm4040_poll(struct file filp, poll_table wait)
421	{
422	struct reader_dev *dev = filp->private_data;
423	unsigned int mask = 0;
424
425	poll_wait(filp, &dev->poll_wait, wait);
426
427	if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
428	mask \|= POLLIN \| POLLRDNORM;
429	if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
430	mask \|= POLLOUT \| POLLWRNORM;
431
432	DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
433
434	return mask;
435	}
436
437	static int cm4040_open(struct inode inode, struct file filp)
438	{
439	struct reader_dev *dev;
fba395ee	440	struct pcmcia_device *link;
77c44ab1	441	int minor = iminor(inode);
8b5332f6	442	int ret;
77c44ab1 HW	443
	444	if (minor >= CM_MAX_DEV)
	445	return -ENODEV;
	446
8b5332f6	447	lock_kernel();
77c44ab1	448	link = dev_table[minor];
8b5332f6 JC	449	if (link == NULL \|\| !pcmcia_dev_present(link)) {
	450	ret = -ENODEV;
	451	goto out;
	452	}
77c44ab1	453
8b5332f6 JC	454	if (link->open) {
	455	ret = -EBUSY;
	456	goto out;
	457	}
77c44ab1 HW	458
	459	dev = link->priv;
	460	filp->private_data = dev;
	461
	462	if (filp->f_flags & O_NONBLOCK) {
	463	DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
8b5332f6 JC	464	ret = -EAGAIN;
8b5332f6 JC	465	goto out;
77c44ab1 HW	466	}
	467
	468	link->open = 1;
	469
	470	dev->poll_timer.data = (unsigned long) dev;
	471	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
	472
	473	DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
8b5332f6 JC	474	ret = nonseekable_open(inode, filp);
	475	out:
	476	unlock_kernel();
	477	return ret;
77c44ab1 HW	478	}
	479
	480	static int cm4040_close(struct inode inode, struct file filp)
	481	{
	482	struct reader_dev *dev = filp->private_data;
fba395ee	483	struct pcmcia_device *link;
77c44ab1 HW	484	int minor = iminor(inode);
	485
	486	DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
	487	iminor(inode));
	488
	489	if (minor >= CM_MAX_DEV)
	490	return -ENODEV;
	491
	492	link = dev_table[minor];
	493	if (link == NULL)
	494	return -ENODEV;
	495
	496	cm4040_stop_poll(dev);
	497
	498	link->open = 0;
	499	wake_up(&dev->devq);
	500
	501	DEBUGP(2, dev, "<- cm4040_close\n");
	502	return 0;
	503	}
	504
fba395ee	505	static void cm4040_reader_release(struct pcmcia_device *link)
77c44ab1 HW	506	{
	507	struct reader_dev *dev = link->priv;
	508
	509	DEBUGP(3, dev, "-> cm4040_reader_release\n");
	510	while (link->open) {
	511	DEBUGP(3, dev, KERN_INFO MODULE_NAME ": delaying release "
	512	"until process has terminated\n");
	513	wait_event(dev->devq, (link->open == 0));
	514	}
	515	DEBUGP(3, dev, "<- cm4040_reader_release\n");
	516	return;
	517	}
	518
84e2d340 DB	519	static int cm4040_config_check(struct pcmcia_device *p_dev,
84e2d340 DB	520	cistpl_cftable_entry_t *cfg,
8e2fc39d	521	cistpl_cftable_entry_t *dflt,
ad913c11	522	unsigned int vcc,
84e2d340	523	void *priv_data)
77c44ab1	524	{
77c44ab1	525	int rc;
84e2d340 DB	526	if (!cfg->io.nwin)
84e2d340 DB	527	return -ENODEV;
77c44ab1	528
84e2d340	529	/* Get the IOaddr */
90abdc3b DB	530	p_dev->resource[0]->start = cfg->io.win[0].base;
	531	p_dev->resource[0]->end = cfg->io.win[0].len;
	532	p_dev->resource[0]->flags \|= pcmcia_io_cfg_data_width(cfg->io.flags);
	533	p_dev->io_lines = cfg->io.flags & CISTPL_IO_LINES_MASK;
	534	rc = pcmcia_request_io(p_dev);
	535
dd2e5a15	536	dev_printk(KERN_INFO, &p_dev->dev,
84e2d340 DB	537	"pcmcia_request_io returned 0x%x\n", rc);
	538	return rc;
	539	}
	540
	541
	542	static int reader_config(struct pcmcia_device *link, int devno)
	543	{
	544	struct reader_dev *dev;
	545	int fail_rc;
77c44ab1	546
84e2d340	547	if (pcmcia_loop_config(link, cm4040_config_check, NULL))
77c44ab1 HW	548	goto cs_release;
	549
	550	link->conf.IntType = 00000002;
	551
4c89e88b DB	552	fail_rc = pcmcia_request_configuration(link, &link->conf);
4c89e88b DB	553	if (fail_rc != 0) {
dd2e5a15	554	dev_printk(KERN_INFO, &link->dev,
77c44ab1 HW	555	"pcmcia_request_configuration failed 0x%x\n",
	556	fail_rc);
	557	goto cs_release;
	558	}
	559
	560	dev = link->priv;
77c44ab1	561
9a017a91 DB	562	DEBUGP(2, dev, "device " DEVICE_NAME "%d at %pR\n", devno,
9a017a91 DB	563	link->resource[0]);
77c44ab1 HW	564	DEBUGP(2, dev, "<- reader_config (succ)\n");
77c44ab1 HW	565
15b99ac1	566	return 0;
77c44ab1	567
77c44ab1 HW	568	cs_release:
77c44ab1 HW	569	reader_release(link);
15b99ac1	570	return -ENODEV;
77c44ab1 HW	571	}
77c44ab1 HW	572
fba395ee	573	static void reader_release(struct pcmcia_device *link)
77c44ab1	574	{
925796e0	575	cm4040_reader_release(link);
fba395ee	576	pcmcia_disable_device(link);
77c44ab1 HW	577	}
77c44ab1 HW	578
15b99ac1	579	static int reader_probe(struct pcmcia_device *link)
77c44ab1 HW	580	{
77c44ab1 HW	581	struct reader_dev *dev;
15b99ac1	582	int i, ret;
77c44ab1 HW	583
	584	for (i = 0; i < CM_MAX_DEV; i++) {
	585	if (dev_table[i] == NULL)
	586	break;
	587	}
	588
	589	if (i == CM_MAX_DEV)
f8cfa618	590	return -ENODEV;
77c44ab1 HW	591
	592	dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
	593	if (dev == NULL)
f8cfa618	594	return -ENOMEM;
77c44ab1 HW	595
	596	dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
	597	dev->buffer_status = 0;
	598
77c44ab1	599	link->priv = dev;
fba395ee	600	dev->p_dev = link;
77c44ab1 HW	601
	602	link->conf.IntType = INT_MEMORY_AND_IO;
	603	dev_table[i] = link;
	604
77c44ab1 HW	605	init_waitqueue_head(&dev->devq);
	606	init_waitqueue_head(&dev->poll_wait);
	607	init_waitqueue_head(&dev->read_wait);
	608	init_waitqueue_head(&dev->write_wait);
40565f19	609	setup_timer(&dev->poll_timer, cm4040_do_poll, 0);
77c44ab1	610
15b99ac1	611	ret = reader_config(link, i);
54493c10 AM	612	if (ret) {
	613	dev_table[i] = NULL;
	614	kfree(dev);
15b99ac1	615	return ret;
54493c10	616	}
f8cfa618	617
03457cd4	618	device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);
67bc6200	619
f8cfa618	620	return 0;
77c44ab1 HW	621	}
77c44ab1 HW	622
fba395ee	623	static void reader_detach(struct pcmcia_device *link)
77c44ab1 HW	624	{
77c44ab1 HW	625	struct reader_dev *dev = link->priv;
cc3b4866	626	int devno;
77c44ab1 HW	627
77c44ab1 HW	628	/* find device */
cc3b4866 DB	629	for (devno = 0; devno < CM_MAX_DEV; devno++) {
cc3b4866 DB	630	if (dev_table[devno] == link)
77c44ab1 HW	631	break;
77c44ab1 HW	632	}
cc3b4866	633	if (devno == CM_MAX_DEV)
77c44ab1 HW	634	return;
77c44ab1 HW	635
e2d40963	636	reader_release(link);
cc3b4866 DB	637
	638	dev_table[devno] = NULL;
	639	kfree(dev);
	640
07c015e7	641	device_destroy(cmx_class, MKDEV(major, devno));
67bc6200	642
77c44ab1 HW	643	return;
	644	}
	645
62322d25	646	static const struct file_operations reader_fops = {
77c44ab1 HW	647	.owner = THIS_MODULE,
	648	.read = cm4040_read,
	649	.write = cm4040_write,
	650	.open = cm4040_open,
	651	.release = cm4040_close,
	652	.poll = cm4040_poll,
6038f373	653	.llseek = no_llseek,
77c44ab1 HW	654	};
	655
	656	static struct pcmcia_device_id cm4040_ids[] = {
	657	PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
	658	PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
	659	0xE32CDD8C, 0x8F23318B),
	660	PCMCIA_DEVICE_NULL,
	661	};
	662	MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
	663
	664	static struct pcmcia_driver reader_driver = {
	665	.owner = THIS_MODULE,
	666	.drv = {
	667	.name = "cm4040_cs",
	668	},
15b99ac1	669	.probe = reader_probe,
cc3b4866	670	.remove = reader_detach,
77c44ab1 HW	671	.id_table = cm4040_ids,
	672	};
	673
	674	static int __init cm4040_init(void)
	675	{
67bc6200 HW	676	int rc;
67bc6200 HW	677
77c44ab1	678	printk(KERN_INFO "%s\n", version);
67bc6200	679	cmx_class = class_create(THIS_MODULE, "cardman_4040");
5eb5fc97 AM	680	if (IS_ERR(cmx_class))
5eb5fc97 AM	681	return PTR_ERR(cmx_class);
67bc6200	682
77c44ab1 HW	683	major = register_chrdev(0, DEVICE_NAME, &reader_fops);
	684	if (major < 0) {
	685	printk(KERN_WARNING MODULE_NAME
	686	": could not get major number\n");
54493c10	687	class_destroy(cmx_class);
5eb5fc97	688	return major;
77c44ab1	689	}
7fc5b1e3 HW	690
	691	rc = pcmcia_register_driver(&reader_driver);
	692	if (rc < 0) {
	693	unregister_chrdev(major, DEVICE_NAME);
54493c10	694	class_destroy(cmx_class);
7fc5b1e3 HW	695	return rc;
	696	}
	697
77c44ab1 HW	698	return 0;
	699	}
	700
	701	static void __exit cm4040_exit(void)
	702	{
77c44ab1 HW	703	printk(KERN_INFO MODULE_NAME ": unloading\n");
77c44ab1 HW	704	pcmcia_unregister_driver(&reader_driver);
77c44ab1	705	unregister_chrdev(major, DEVICE_NAME);
67bc6200	706	class_destroy(cmx_class);
77c44ab1 HW	707	}
	708
	709	module_init(cm4040_init);
	710	module_exit(cm4040_exit);
	711	MODULE_LICENSE("Dual BSD/GPL");