blob: 75ee0d3f6f457707d79cbf5f5d021469710eb06d [file] [log] [blame]
Jiri Slabycef2cf02007-05-08 00:31:45 -07001/*
2 * Copyright (C) 2005-2007 Jiri Slaby <jirislaby@gmail.com>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
Frederik Schwarzer0211a9c2008-12-29 22:14:56 +01009 * You need a userspace library to cooperate with this driver. It (and other
Jiri Slabycef2cf02007-05-08 00:31:45 -070010 * info) may be obtained here:
11 * http://www.fi.muni.cz/~xslaby/phantom.html
Jiri Slabyb2afe332007-10-18 23:40:24 -070012 * or alternatively, you might use OpenHaptics provided by Sensable.
Jiri Slabycef2cf02007-05-08 00:31:45 -070013 */
14
Jiri Slaby7e4e8e62008-04-29 00:59:13 -070015#include <linux/compat.h>
Jiri Slabycef2cf02007-05-08 00:31:45 -070016#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/device.h>
19#include <linux/pci.h>
20#include <linux/fs.h>
21#include <linux/poll.h>
22#include <linux/interrupt.h>
23#include <linux/cdev.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Jiri Slabycef2cf02007-05-08 00:31:45 -070025#include <linux/phantom.h>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +040026#include <linux/sched.h>
Jonathan Corbet4541b5e2008-05-16 14:03:05 -060027#include <linux/smp_lock.h>
Jiri Slabycef2cf02007-05-08 00:31:45 -070028
29#include <asm/atomic.h>
30#include <asm/io.h>
31
Jiri Slaby82f56082008-02-06 01:38:03 -080032#define PHANTOM_VERSION "n0.9.8"
Jiri Slabycef2cf02007-05-08 00:31:45 -070033
34#define PHANTOM_MAX_MINORS 8
35
36#define PHN_IRQCTL 0x4c /* irq control in caddr space */
37
38#define PHB_RUNNING 1
Jiri Slabybc552f72007-10-18 23:40:24 -070039#define PHB_NOT_OH 2
Jiri Slabycef2cf02007-05-08 00:31:45 -070040
41static struct class *phantom_class;
42static int phantom_major;
43
44struct phantom_device {
45 unsigned int opened;
46 void __iomem *caddr;
47 u32 __iomem *iaddr;
48 u32 __iomem *oaddr;
49 unsigned long status;
50 atomic_t counter;
51
52 wait_queue_head_t wait;
53 struct cdev cdev;
54
55 struct mutex open_lock;
Jiri Slabybc552f72007-10-18 23:40:24 -070056 spinlock_t regs_lock;
57
58 /* used in NOT_OH mode */
59 struct phm_regs oregs;
60 u32 ctl_reg;
Jiri Slabycef2cf02007-05-08 00:31:45 -070061};
62
63static unsigned char phantom_devices[PHANTOM_MAX_MINORS];
64
65static int phantom_status(struct phantom_device *dev, unsigned long newstat)
66{
67 pr_debug("phantom_status %lx %lx\n", dev->status, newstat);
68
69 if (!(dev->status & PHB_RUNNING) && (newstat & PHB_RUNNING)) {
70 atomic_set(&dev->counter, 0);
71 iowrite32(PHN_CTL_IRQ, dev->iaddr + PHN_CONTROL);
72 iowrite32(0x43, dev->caddr + PHN_IRQCTL);
Jiri Slabyc8511f92007-05-23 13:57:59 -070073 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
74 } else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) {
Jiri Slabycef2cf02007-05-08 00:31:45 -070075 iowrite32(0, dev->caddr + PHN_IRQCTL);
Jiri Slabyc8511f92007-05-23 13:57:59 -070076 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
77 }
Jiri Slabycef2cf02007-05-08 00:31:45 -070078
79 dev->status = newstat;
80
81 return 0;
82}
83
84/*
85 * File ops
86 */
87
Jiri Slabyc15395c2007-05-23 13:57:58 -070088static long phantom_ioctl(struct file *file, unsigned int cmd,
89 unsigned long arg)
Jiri Slabycef2cf02007-05-08 00:31:45 -070090{
91 struct phantom_device *dev = file->private_data;
92 struct phm_regs rs;
93 struct phm_reg r;
94 void __user *argp = (void __user *)arg;
Jiri Slabybc552f72007-10-18 23:40:24 -070095 unsigned long flags;
Jiri Slabycef2cf02007-05-08 00:31:45 -070096 unsigned int i;
97
Jiri Slabycef2cf02007-05-08 00:31:45 -070098 switch (cmd) {
Jiri Slaby7e4e8e62008-04-29 00:59:13 -070099 case PHN_SETREG:
Jiri Slabycef2cf02007-05-08 00:31:45 -0700100 case PHN_SET_REG:
101 if (copy_from_user(&r, argp, sizeof(r)))
102 return -EFAULT;
103
104 if (r.reg > 7)
105 return -EINVAL;
106
Jiri Slabybc552f72007-10-18 23:40:24 -0700107 spin_lock_irqsave(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700108 if (r.reg == PHN_CONTROL && (r.value & PHN_CTL_IRQ) &&
Jiri Slabyc15395c2007-05-23 13:57:58 -0700109 phantom_status(dev, dev->status | PHB_RUNNING)){
Jiri Slabybc552f72007-10-18 23:40:24 -0700110 spin_unlock_irqrestore(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700111 return -ENODEV;
Jiri Slabyc15395c2007-05-23 13:57:58 -0700112 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700113
114 pr_debug("phantom: writing %x to %u\n", r.value, r.reg);
Jiri Slabybc552f72007-10-18 23:40:24 -0700115
116 /* preserve amp bit (don't allow to change it when in NOT_OH) */
117 if (r.reg == PHN_CONTROL && (dev->status & PHB_NOT_OH)) {
118 r.value &= ~PHN_CTL_AMP;
119 r.value |= dev->ctl_reg & PHN_CTL_AMP;
120 dev->ctl_reg = r.value;
121 }
122
Jiri Slabycef2cf02007-05-08 00:31:45 -0700123 iowrite32(r.value, dev->iaddr + r.reg);
Jiri Slabyc8511f92007-05-23 13:57:59 -0700124 ioread32(dev->iaddr); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700125
126 if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ))
127 phantom_status(dev, dev->status & ~PHB_RUNNING);
Jiri Slabybc552f72007-10-18 23:40:24 -0700128 spin_unlock_irqrestore(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700129 break;
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700130 case PHN_SETREGS:
Jiri Slabycef2cf02007-05-08 00:31:45 -0700131 case PHN_SET_REGS:
132 if (copy_from_user(&rs, argp, sizeof(rs)))
133 return -EFAULT;
134
135 pr_debug("phantom: SRS %u regs %x\n", rs.count, rs.mask);
Jiri Slabybc552f72007-10-18 23:40:24 -0700136 spin_lock_irqsave(&dev->regs_lock, flags);
137 if (dev->status & PHB_NOT_OH)
138 memcpy(&dev->oregs, &rs, sizeof(rs));
139 else {
140 u32 m = min(rs.count, 8U);
141 for (i = 0; i < m; i++)
142 if (rs.mask & BIT(i))
143 iowrite32(rs.values[i], dev->oaddr + i);
144 ioread32(dev->iaddr); /* PCI posting */
145 }
146 spin_unlock_irqrestore(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700147 break;
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700148 case PHN_GETREG:
Jiri Slabycef2cf02007-05-08 00:31:45 -0700149 case PHN_GET_REG:
150 if (copy_from_user(&r, argp, sizeof(r)))
151 return -EFAULT;
152
153 if (r.reg > 7)
154 return -EINVAL;
155
156 r.value = ioread32(dev->iaddr + r.reg);
157
158 if (copy_to_user(argp, &r, sizeof(r)))
159 return -EFAULT;
160 break;
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700161 case PHN_GETREGS:
Jiri Slabybc552f72007-10-18 23:40:24 -0700162 case PHN_GET_REGS: {
163 u32 m;
164
Jiri Slabycef2cf02007-05-08 00:31:45 -0700165 if (copy_from_user(&rs, argp, sizeof(rs)))
166 return -EFAULT;
167
Jiri Slabybc552f72007-10-18 23:40:24 -0700168 m = min(rs.count, 8U);
169
Jiri Slabycef2cf02007-05-08 00:31:45 -0700170 pr_debug("phantom: GRS %u regs %x\n", rs.count, rs.mask);
Jiri Slabybc552f72007-10-18 23:40:24 -0700171 spin_lock_irqsave(&dev->regs_lock, flags);
172 for (i = 0; i < m; i++)
173 if (rs.mask & BIT(i))
Jiri Slabycef2cf02007-05-08 00:31:45 -0700174 rs.values[i] = ioread32(dev->iaddr + i);
Jiri Slaby7d4f9f02008-04-29 00:59:14 -0700175 atomic_set(&dev->counter, 0);
Jiri Slabybc552f72007-10-18 23:40:24 -0700176 spin_unlock_irqrestore(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700177
178 if (copy_to_user(argp, &rs, sizeof(rs)))
179 return -EFAULT;
180 break;
Jiri Slabybc552f72007-10-18 23:40:24 -0700181 } case PHN_NOT_OH:
182 spin_lock_irqsave(&dev->regs_lock, flags);
183 if (dev->status & PHB_RUNNING) {
184 printk(KERN_ERR "phantom: you need to set NOT_OH "
185 "before you start the device!\n");
186 spin_unlock_irqrestore(&dev->regs_lock, flags);
187 return -EINVAL;
188 }
189 dev->status |= PHB_NOT_OH;
190 spin_unlock_irqrestore(&dev->regs_lock, flags);
191 break;
Jiri Slabycef2cf02007-05-08 00:31:45 -0700192 default:
193 return -ENOTTY;
194 }
195
196 return 0;
197}
198
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700199#ifdef CONFIG_COMPAT
200static long phantom_compat_ioctl(struct file *filp, unsigned int cmd,
201 unsigned long arg)
202{
203 if (_IOC_NR(cmd) <= 3 && _IOC_SIZE(cmd) == sizeof(compat_uptr_t)) {
204 cmd &= ~(_IOC_SIZEMASK << _IOC_SIZESHIFT);
205 cmd |= sizeof(void *) << _IOC_SIZESHIFT;
206 }
207 return phantom_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
208}
209#else
210#define phantom_compat_ioctl NULL
211#endif
212
Jiri Slabycef2cf02007-05-08 00:31:45 -0700213static int phantom_open(struct inode *inode, struct file *file)
214{
215 struct phantom_device *dev = container_of(inode->i_cdev,
216 struct phantom_device, cdev);
217
Jonathan Corbet4541b5e2008-05-16 14:03:05 -0600218 lock_kernel();
Jiri Slabycef2cf02007-05-08 00:31:45 -0700219 nonseekable_open(inode, file);
220
Jonathan Corbet4541b5e2008-05-16 14:03:05 -0600221 if (mutex_lock_interruptible(&dev->open_lock)) {
222 unlock_kernel();
Jiri Slabycef2cf02007-05-08 00:31:45 -0700223 return -ERESTARTSYS;
Jonathan Corbet4541b5e2008-05-16 14:03:05 -0600224 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700225
226 if (dev->opened) {
227 mutex_unlock(&dev->open_lock);
Jonathan Corbet4541b5e2008-05-16 14:03:05 -0600228 unlock_kernel();
Jiri Slabycef2cf02007-05-08 00:31:45 -0700229 return -EINVAL;
230 }
231
Jiri Slabybc552f72007-10-18 23:40:24 -0700232 WARN_ON(dev->status & PHB_NOT_OH);
233
Jiri Slabycef2cf02007-05-08 00:31:45 -0700234 file->private_data = dev;
235
Jiri Slabybc552f72007-10-18 23:40:24 -0700236 atomic_set(&dev->counter, 0);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700237 dev->opened++;
238 mutex_unlock(&dev->open_lock);
Jonathan Corbet4541b5e2008-05-16 14:03:05 -0600239 unlock_kernel();
Jiri Slabycef2cf02007-05-08 00:31:45 -0700240 return 0;
241}
242
243static int phantom_release(struct inode *inode, struct file *file)
244{
245 struct phantom_device *dev = file->private_data;
246
247 mutex_lock(&dev->open_lock);
248
249 dev->opened = 0;
250 phantom_status(dev, dev->status & ~PHB_RUNNING);
Jiri Slabybc552f72007-10-18 23:40:24 -0700251 dev->status &= ~PHB_NOT_OH;
Jiri Slabycef2cf02007-05-08 00:31:45 -0700252
253 mutex_unlock(&dev->open_lock);
254
255 return 0;
256}
257
258static unsigned int phantom_poll(struct file *file, poll_table *wait)
259{
260 struct phantom_device *dev = file->private_data;
261 unsigned int mask = 0;
262
263 pr_debug("phantom_poll: %d\n", atomic_read(&dev->counter));
264 poll_wait(file, &dev->wait, wait);
Jiri Slaby7d4f9f02008-04-29 00:59:14 -0700265
266 if (!(dev->status & PHB_RUNNING))
267 mask = POLLERR;
268 else if (atomic_read(&dev->counter))
Jiri Slabycef2cf02007-05-08 00:31:45 -0700269 mask = POLLIN | POLLRDNORM;
Jiri Slaby7d4f9f02008-04-29 00:59:14 -0700270
Jiri Slabycef2cf02007-05-08 00:31:45 -0700271 pr_debug("phantom_poll end: %x/%d\n", mask, atomic_read(&dev->counter));
272
273 return mask;
274}
275
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700276static const struct file_operations phantom_file_ops = {
Jiri Slabycef2cf02007-05-08 00:31:45 -0700277 .open = phantom_open,
278 .release = phantom_release,
Jiri Slabyc15395c2007-05-23 13:57:58 -0700279 .unlocked_ioctl = phantom_ioctl,
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700280 .compat_ioctl = phantom_compat_ioctl,
Jiri Slabycef2cf02007-05-08 00:31:45 -0700281 .poll = phantom_poll,
282};
283
284static irqreturn_t phantom_isr(int irq, void *data)
285{
286 struct phantom_device *dev = data;
Jiri Slabybc552f72007-10-18 23:40:24 -0700287 unsigned int i;
288 u32 ctl;
Jiri Slabycef2cf02007-05-08 00:31:45 -0700289
Jiri Slabybc552f72007-10-18 23:40:24 -0700290 spin_lock(&dev->regs_lock);
291 ctl = ioread32(dev->iaddr + PHN_CONTROL);
292 if (!(ctl & PHN_CTL_IRQ)) {
293 spin_unlock(&dev->regs_lock);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700294 return IRQ_NONE;
Jiri Slabybc552f72007-10-18 23:40:24 -0700295 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700296
297 iowrite32(0, dev->iaddr);
298 iowrite32(0xc0, dev->iaddr);
Jiri Slabybc552f72007-10-18 23:40:24 -0700299
300 if (dev->status & PHB_NOT_OH) {
301 struct phm_regs *r = &dev->oregs;
302 u32 m = min(r->count, 8U);
303
304 for (i = 0; i < m; i++)
305 if (r->mask & BIT(i))
306 iowrite32(r->values[i], dev->oaddr + i);
307
308 dev->ctl_reg ^= PHN_CTL_AMP;
309 iowrite32(dev->ctl_reg, dev->iaddr + PHN_CONTROL);
310 }
311 spin_unlock(&dev->regs_lock);
312
Jiri Slabyc8511f92007-05-23 13:57:59 -0700313 ioread32(dev->iaddr); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700314
315 atomic_inc(&dev->counter);
316 wake_up_interruptible(&dev->wait);
317
318 return IRQ_HANDLED;
319}
320
321/*
322 * Init and deinit driver
323 */
324
325static unsigned int __devinit phantom_get_free(void)
326{
327 unsigned int i;
328
329 for (i = 0; i < PHANTOM_MAX_MINORS; i++)
330 if (phantom_devices[i] == 0)
331 break;
332
333 return i;
334}
335
336static int __devinit phantom_probe(struct pci_dev *pdev,
337 const struct pci_device_id *pci_id)
338{
339 struct phantom_device *pht;
340 unsigned int minor;
341 int retval;
342
343 retval = pci_enable_device(pdev);
344 if (retval)
345 goto err;
346
347 minor = phantom_get_free();
348 if (minor == PHANTOM_MAX_MINORS) {
349 dev_err(&pdev->dev, "too many devices found!\n");
350 retval = -EIO;
351 goto err_dis;
352 }
353
354 phantom_devices[minor] = 1;
355
356 retval = pci_request_regions(pdev, "phantom");
357 if (retval)
358 goto err_null;
359
360 retval = -ENOMEM;
361 pht = kzalloc(sizeof(*pht), GFP_KERNEL);
362 if (pht == NULL) {
363 dev_err(&pdev->dev, "unable to allocate device\n");
364 goto err_reg;
365 }
366
367 pht->caddr = pci_iomap(pdev, 0, 0);
368 if (pht->caddr == NULL) {
369 dev_err(&pdev->dev, "can't remap conf space\n");
370 goto err_fr;
371 }
372 pht->iaddr = pci_iomap(pdev, 2, 0);
373 if (pht->iaddr == NULL) {
374 dev_err(&pdev->dev, "can't remap input space\n");
375 goto err_unmc;
376 }
377 pht->oaddr = pci_iomap(pdev, 3, 0);
378 if (pht->oaddr == NULL) {
379 dev_err(&pdev->dev, "can't remap output space\n");
380 goto err_unmi;
381 }
382
383 mutex_init(&pht->open_lock);
Jiri Slabybc552f72007-10-18 23:40:24 -0700384 spin_lock_init(&pht->regs_lock);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700385 init_waitqueue_head(&pht->wait);
386 cdev_init(&pht->cdev, &phantom_file_ops);
387 pht->cdev.owner = THIS_MODULE;
388
389 iowrite32(0, pht->caddr + PHN_IRQCTL);
Jiri Slabyc8511f92007-05-23 13:57:59 -0700390 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700391 retval = request_irq(pdev->irq, phantom_isr,
392 IRQF_SHARED | IRQF_DISABLED, "phantom", pht);
393 if (retval) {
394 dev_err(&pdev->dev, "can't establish ISR\n");
395 goto err_unmo;
396 }
397
398 retval = cdev_add(&pht->cdev, MKDEV(phantom_major, minor), 1);
399 if (retval) {
400 dev_err(&pdev->dev, "chardev registration failed\n");
401 goto err_irq;
402 }
403
Greg Kroah-Hartmana9b12612008-07-21 20:03:34 -0700404 if (IS_ERR(device_create(phantom_class, &pdev->dev,
405 MKDEV(phantom_major, minor), NULL,
406 "phantom%u", minor)))
Jiri Slabycef2cf02007-05-08 00:31:45 -0700407 dev_err(&pdev->dev, "can't create device\n");
408
409 pci_set_drvdata(pdev, pht);
410
411 return 0;
412err_irq:
413 free_irq(pdev->irq, pht);
414err_unmo:
415 pci_iounmap(pdev, pht->oaddr);
416err_unmi:
417 pci_iounmap(pdev, pht->iaddr);
418err_unmc:
419 pci_iounmap(pdev, pht->caddr);
420err_fr:
421 kfree(pht);
422err_reg:
423 pci_release_regions(pdev);
424err_null:
425 phantom_devices[minor] = 0;
426err_dis:
427 pci_disable_device(pdev);
428err:
429 return retval;
430}
431
432static void __devexit phantom_remove(struct pci_dev *pdev)
433{
434 struct phantom_device *pht = pci_get_drvdata(pdev);
435 unsigned int minor = MINOR(pht->cdev.dev);
436
437 device_destroy(phantom_class, MKDEV(phantom_major, minor));
438
439 cdev_del(&pht->cdev);
440
441 iowrite32(0, pht->caddr + PHN_IRQCTL);
Jiri Slabyc8511f92007-05-23 13:57:59 -0700442 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700443 free_irq(pdev->irq, pht);
444
445 pci_iounmap(pdev, pht->oaddr);
446 pci_iounmap(pdev, pht->iaddr);
447 pci_iounmap(pdev, pht->caddr);
448
449 kfree(pht);
450
451 pci_release_regions(pdev);
452
453 phantom_devices[minor] = 0;
454
455 pci_disable_device(pdev);
456}
457
458#ifdef CONFIG_PM
459static int phantom_suspend(struct pci_dev *pdev, pm_message_t state)
460{
461 struct phantom_device *dev = pci_get_drvdata(pdev);
462
463 iowrite32(0, dev->caddr + PHN_IRQCTL);
Jiri Slabyc8511f92007-05-23 13:57:59 -0700464 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700465
Jiri Slabyaee84472007-10-18 23:40:23 -0700466 synchronize_irq(pdev->irq);
467
Jiri Slabycef2cf02007-05-08 00:31:45 -0700468 return 0;
469}
470
471static int phantom_resume(struct pci_dev *pdev)
472{
473 struct phantom_device *dev = pci_get_drvdata(pdev);
474
475 iowrite32(0, dev->caddr + PHN_IRQCTL);
476
477 return 0;
478}
479#else
480#define phantom_suspend NULL
481#define phantom_resume NULL
482#endif
483
484static struct pci_device_id phantom_pci_tbl[] __devinitdata = {
Jiri Slaby82f56082008-02-06 01:38:03 -0800485 { .vendor = PCI_VENDOR_ID_PLX, .device = PCI_DEVICE_ID_PLX_9050,
486 .subvendor = PCI_VENDOR_ID_PLX, .subdevice = PCI_DEVICE_ID_PLX_9050,
487 .class = PCI_CLASS_BRIDGE_OTHER << 8, .class_mask = 0xffff00 },
Jiri Slabycef2cf02007-05-08 00:31:45 -0700488 { 0, }
489};
490MODULE_DEVICE_TABLE(pci, phantom_pci_tbl);
491
492static struct pci_driver phantom_pci_driver = {
493 .name = "phantom",
494 .id_table = phantom_pci_tbl,
495 .probe = phantom_probe,
496 .remove = __devexit_p(phantom_remove),
497 .suspend = phantom_suspend,
498 .resume = phantom_resume
499};
500
Andi Kleen0933e2d2010-01-05 12:48:09 +0100501static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700502
503static int __init phantom_init(void)
504{
505 int retval;
506 dev_t dev;
507
508 phantom_class = class_create(THIS_MODULE, "phantom");
509 if (IS_ERR(phantom_class)) {
510 retval = PTR_ERR(phantom_class);
511 printk(KERN_ERR "phantom: can't register phantom class\n");
512 goto err;
513 }
Andi Kleen0933e2d2010-01-05 12:48:09 +0100514 retval = class_create_file(phantom_class, &class_attr_version.attr);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700515 if (retval) {
516 printk(KERN_ERR "phantom: can't create sysfs version file\n");
517 goto err_class;
518 }
519
520 retval = alloc_chrdev_region(&dev, 0, PHANTOM_MAX_MINORS, "phantom");
521 if (retval) {
522 printk(KERN_ERR "phantom: can't register character device\n");
523 goto err_attr;
524 }
525 phantom_major = MAJOR(dev);
526
527 retval = pci_register_driver(&phantom_pci_driver);
528 if (retval) {
529 printk(KERN_ERR "phantom: can't register pci driver\n");
530 goto err_unchr;
531 }
532
533 printk(KERN_INFO "Phantom Linux Driver, version " PHANTOM_VERSION ", "
534 "init OK\n");
535
536 return 0;
537err_unchr:
538 unregister_chrdev_region(dev, PHANTOM_MAX_MINORS);
539err_attr:
Andi Kleen0933e2d2010-01-05 12:48:09 +0100540 class_remove_file(phantom_class, &class_attr_version.attr);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700541err_class:
542 class_destroy(phantom_class);
543err:
544 return retval;
545}
546
547static void __exit phantom_exit(void)
548{
549 pci_unregister_driver(&phantom_pci_driver);
550
551 unregister_chrdev_region(MKDEV(phantom_major, 0), PHANTOM_MAX_MINORS);
552
Andi Kleen0933e2d2010-01-05 12:48:09 +0100553 class_remove_file(phantom_class, &class_attr_version.attr);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700554 class_destroy(phantom_class);
555
556 pr_debug("phantom: module successfully removed\n");
557}
558
559module_init(phantom_init);
560module_exit(phantom_exit);
561
562MODULE_AUTHOR("Jiri Slaby <jirislaby@gmail.com>");
Jiri Slabyec905a12008-07-25 01:48:23 -0700563MODULE_DESCRIPTION("Sensable Phantom driver (PCI devices)");
Jiri Slabycef2cf02007-05-08 00:31:45 -0700564MODULE_LICENSE("GPL");
565MODULE_VERSION(PHANTOM_VERSION);