summaryrefslogtreecommitdiff
path: root/drivers/char/pcmcia/cm4040_cs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/pcmcia/cm4040_cs.c')
-rw-r--r--drivers/char/pcmcia/cm4040_cs.c684
1 files changed, 0 insertions, 684 deletions
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
deleted file mode 100644
index 11ff59e2b963..000000000000
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ /dev/null
@@ -1,684 +0,0 @@
-/*
- * 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/mutex.h>
-#include <linux/wait.h>
-#include <linux/uaccess.h>
-#include <asm/io.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 DEFINE_MUTEX(cm4040_mutex);
-
-#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(struct timer_list *t)
-{
- struct reader_dev *dev = from_timer(dev, t, poll_timer);
- 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;
-
- 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;
- }
-
- 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 __poll_t cm4040_poll(struct file *filp, poll_table *wait)
-{
- struct reader_dev *dev = filp->private_data;
- __poll_t mask = 0;
-
- poll_wait(filp, &dev->poll_wait, wait);
-
- if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
- mask |= EPOLLIN | EPOLLRDNORM;
- if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
- mask |= EPOLLOUT | EPOLLWRNORM;
-
- 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;
-
- mutex_lock(&cm4040_mutex);
- 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;
-
- mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
-
- DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
- ret = nonseekable_open(inode, filp);
-out:
- mutex_unlock(&cm4040_mutex);
- 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, 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, void *priv_data)
-{
- return pcmcia_request_io(p_dev);
-}
-
-
-static int reader_config(struct pcmcia_device *link, int devno)
-{
- struct reader_dev *dev;
- int fail_rc;
-
- link->config_flags |= CONF_AUTO_SET_IO;
-
- if (pcmcia_loop_config(link, cm4040_config_check, NULL))
- goto cs_release;
-
- fail_rc = pcmcia_enable_device(link);
- if (fail_rc != 0) {
- dev_info(&link->dev, "pcmcia_enable_device 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;
-
- 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);
- timer_setup(&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 const 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,
- .name = "cm4040_cs",
- .probe = reader_probe,
- .remove = reader_detach,
- .id_table = cm4040_ids,
-};
-
-static int __init cm4040_init(void)
-{
- int rc;
-
- cmx_class = class_create("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)
-{
- 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");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-13 16:30:56 +0300