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cef2cf07 JS |
1 | /* |
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 | * | |
0211a9c8 | 9 | * You need a userspace library to cooperate with this driver. It (and other |
cef2cf07 JS |
10 | * info) may be obtained here: |
11 | * http://www.fi.muni.cz/~xslaby/phantom.html | |
b2afe331 | 12 | * or alternatively, you might use OpenHaptics provided by Sensable. |
cef2cf07 JS |
13 | */ |
14 | ||
7e4e8e68 | 15 | #include <linux/compat.h> |
cef2cf07 JS |
16 | #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> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
cef2cf07 | 25 | #include <linux/phantom.h> |
d43c36dc | 26 | #include <linux/sched.h> |
4541b5ec | 27 | #include <linux/smp_lock.h> |
cef2cf07 JS |
28 | |
29 | #include <asm/atomic.h> | |
30 | #include <asm/io.h> | |
31 | ||
82f56087 | 32 | #define PHANTOM_VERSION "n0.9.8" |
cef2cf07 JS |
33 | |
34 | #define PHANTOM_MAX_MINORS 8 | |
35 | ||
36 | #define PHN_IRQCTL 0x4c /* irq control in caddr space */ | |
37 | ||
38 | #define PHB_RUNNING 1 | |
bc552f77 | 39 | #define PHB_NOT_OH 2 |
cef2cf07 JS |
40 | |
41 | static struct class *phantom_class; | |
42 | static int phantom_major; | |
43 | ||
44 | struct 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; | |
bc552f77 JS |
56 | spinlock_t regs_lock; |
57 | ||
58 | /* used in NOT_OH mode */ | |
59 | struct phm_regs oregs; | |
60 | u32 ctl_reg; | |
cef2cf07 JS |
61 | }; |
62 | ||
63 | static unsigned char phantom_devices[PHANTOM_MAX_MINORS]; | |
64 | ||
65 | static 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); | |
c8511f94 JS |
73 | ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */ |
74 | } else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) { | |
cef2cf07 | 75 | iowrite32(0, dev->caddr + PHN_IRQCTL); |
c8511f94 JS |
76 | ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */ |
77 | } | |
cef2cf07 JS |
78 | |
79 | dev->status = newstat; | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
84 | /* | |
85 | * File ops | |
86 | */ | |
87 | ||
c15395c0 JS |
88 | static long phantom_ioctl(struct file *file, unsigned int cmd, |
89 | unsigned long arg) | |
cef2cf07 JS |
90 | { |
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; | |
bc552f77 | 95 | unsigned long flags; |
cef2cf07 JS |
96 | unsigned int i; |
97 | ||
cef2cf07 | 98 | switch (cmd) { |
7e4e8e68 | 99 | case PHN_SETREG: |
cef2cf07 JS |
100 | 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 | ||
bc552f77 | 107 | spin_lock_irqsave(&dev->regs_lock, flags); |
cef2cf07 | 108 | if (r.reg == PHN_CONTROL && (r.value & PHN_CTL_IRQ) && |
c15395c0 | 109 | phantom_status(dev, dev->status | PHB_RUNNING)){ |
bc552f77 | 110 | spin_unlock_irqrestore(&dev->regs_lock, flags); |
cef2cf07 | 111 | return -ENODEV; |
c15395c0 | 112 | } |
cef2cf07 JS |
113 | |
114 | pr_debug("phantom: writing %x to %u\n", r.value, r.reg); | |
bc552f77 JS |
115 | |
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 | ||
cef2cf07 | 123 | iowrite32(r.value, dev->iaddr + r.reg); |
c8511f94 | 124 | ioread32(dev->iaddr); /* PCI posting */ |
cef2cf07 JS |
125 | |
126 | if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ)) | |
127 | phantom_status(dev, dev->status & ~PHB_RUNNING); | |
bc552f77 | 128 | spin_unlock_irqrestore(&dev->regs_lock, flags); |
cef2cf07 | 129 | break; |
7e4e8e68 | 130 | case PHN_SETREGS: |
cef2cf07 JS |
131 | 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); | |
bc552f77 JS |
136 | 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); | |
cef2cf07 | 147 | break; |
7e4e8e68 | 148 | case PHN_GETREG: |
cef2cf07 JS |
149 | 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; | |
7e4e8e68 | 161 | case PHN_GETREGS: |
bc552f77 JS |
162 | case PHN_GET_REGS: { |
163 | u32 m; | |
164 | ||
cef2cf07 JS |
165 | if (copy_from_user(&rs, argp, sizeof(rs))) |
166 | return -EFAULT; | |
167 | ||
bc552f77 JS |
168 | m = min(rs.count, 8U); |
169 | ||
cef2cf07 | 170 | pr_debug("phantom: GRS %u regs %x\n", rs.count, rs.mask); |
bc552f77 JS |
171 | spin_lock_irqsave(&dev->regs_lock, flags); |
172 | for (i = 0; i < m; i++) | |
173 | if (rs.mask & BIT(i)) | |
cef2cf07 | 174 | rs.values[i] = ioread32(dev->iaddr + i); |
7d4f9f09 | 175 | atomic_set(&dev->counter, 0); |
bc552f77 | 176 | spin_unlock_irqrestore(&dev->regs_lock, flags); |
cef2cf07 JS |
177 | |
178 | if (copy_to_user(argp, &rs, sizeof(rs))) | |
179 | return -EFAULT; | |
180 | break; | |
bc552f77 JS |
181 | } 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; | |
cef2cf07 JS |
192 | default: |
193 | return -ENOTTY; | |
194 | } | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
7e4e8e68 JS |
199 | #ifdef CONFIG_COMPAT |
200 | static 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 | ||
cef2cf07 JS |
213 | static 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 | ||
4541b5ec | 218 | lock_kernel(); |
cef2cf07 JS |
219 | nonseekable_open(inode, file); |
220 | ||
4541b5ec JC |
221 | if (mutex_lock_interruptible(&dev->open_lock)) { |
222 | unlock_kernel(); | |
cef2cf07 | 223 | return -ERESTARTSYS; |
4541b5ec | 224 | } |
cef2cf07 JS |
225 | |
226 | if (dev->opened) { | |
227 | mutex_unlock(&dev->open_lock); | |
4541b5ec | 228 | unlock_kernel(); |
cef2cf07 JS |
229 | return -EINVAL; |
230 | } | |
231 | ||
bc552f77 JS |
232 | WARN_ON(dev->status & PHB_NOT_OH); |
233 | ||
cef2cf07 JS |
234 | file->private_data = dev; |
235 | ||
bc552f77 | 236 | atomic_set(&dev->counter, 0); |
cef2cf07 JS |
237 | dev->opened++; |
238 | mutex_unlock(&dev->open_lock); | |
4541b5ec | 239 | unlock_kernel(); |
cef2cf07 JS |
240 | return 0; |
241 | } | |
242 | ||
243 | static 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); | |
bc552f77 | 251 | dev->status &= ~PHB_NOT_OH; |
cef2cf07 JS |
252 | |
253 | mutex_unlock(&dev->open_lock); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static 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); | |
7d4f9f09 JS |
265 | |
266 | if (!(dev->status & PHB_RUNNING)) | |
267 | mask = POLLERR; | |
268 | else if (atomic_read(&dev->counter)) | |
cef2cf07 | 269 | mask = POLLIN | POLLRDNORM; |
7d4f9f09 | 270 | |
cef2cf07 JS |
271 | pr_debug("phantom_poll end: %x/%d\n", mask, atomic_read(&dev->counter)); |
272 | ||
273 | return mask; | |
274 | } | |
275 | ||
828c0950 | 276 | static const struct file_operations phantom_file_ops = { |
cef2cf07 JS |
277 | .open = phantom_open, |
278 | .release = phantom_release, | |
c15395c0 | 279 | .unlocked_ioctl = phantom_ioctl, |
7e4e8e68 | 280 | .compat_ioctl = phantom_compat_ioctl, |
cef2cf07 | 281 | .poll = phantom_poll, |
6038f373 | 282 | .llseek = no_llseek, |
cef2cf07 JS |
283 | }; |
284 | ||
285 | static irqreturn_t phantom_isr(int irq, void *data) | |
286 | { | |
287 | struct phantom_device *dev = data; | |
bc552f77 JS |
288 | unsigned int i; |
289 | u32 ctl; | |
cef2cf07 | 290 | |
bc552f77 JS |
291 | spin_lock(&dev->regs_lock); |
292 | ctl = ioread32(dev->iaddr + PHN_CONTROL); | |
293 | if (!(ctl & PHN_CTL_IRQ)) { | |
294 | spin_unlock(&dev->regs_lock); | |
cef2cf07 | 295 | return IRQ_NONE; |
bc552f77 | 296 | } |
cef2cf07 JS |
297 | |
298 | iowrite32(0, dev->iaddr); | |
299 | iowrite32(0xc0, dev->iaddr); | |
bc552f77 JS |
300 | |
301 | if (dev->status & PHB_NOT_OH) { | |
302 | struct phm_regs *r = &dev->oregs; | |
303 | u32 m = min(r->count, 8U); | |
304 | ||
305 | for (i = 0; i < m; i++) | |
306 | if (r->mask & BIT(i)) | |
307 | iowrite32(r->values[i], dev->oaddr + i); | |
308 | ||
309 | dev->ctl_reg ^= PHN_CTL_AMP; | |
310 | iowrite32(dev->ctl_reg, dev->iaddr + PHN_CONTROL); | |
311 | } | |
312 | spin_unlock(&dev->regs_lock); | |
313 | ||
c8511f94 | 314 | ioread32(dev->iaddr); /* PCI posting */ |
cef2cf07 JS |
315 | |
316 | atomic_inc(&dev->counter); | |
317 | wake_up_interruptible(&dev->wait); | |
318 | ||
319 | return IRQ_HANDLED; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Init and deinit driver | |
324 | */ | |
325 | ||
326 | static unsigned int __devinit phantom_get_free(void) | |
327 | { | |
328 | unsigned int i; | |
329 | ||
330 | for (i = 0; i < PHANTOM_MAX_MINORS; i++) | |
331 | if (phantom_devices[i] == 0) | |
332 | break; | |
333 | ||
334 | return i; | |
335 | } | |
336 | ||
337 | static int __devinit phantom_probe(struct pci_dev *pdev, | |
338 | const struct pci_device_id *pci_id) | |
339 | { | |
340 | struct phantom_device *pht; | |
341 | unsigned int minor; | |
342 | int retval; | |
343 | ||
344 | retval = pci_enable_device(pdev); | |
345 | if (retval) | |
346 | goto err; | |
347 | ||
348 | minor = phantom_get_free(); | |
349 | if (minor == PHANTOM_MAX_MINORS) { | |
350 | dev_err(&pdev->dev, "too many devices found!\n"); | |
351 | retval = -EIO; | |
352 | goto err_dis; | |
353 | } | |
354 | ||
355 | phantom_devices[minor] = 1; | |
356 | ||
357 | retval = pci_request_regions(pdev, "phantom"); | |
358 | if (retval) | |
359 | goto err_null; | |
360 | ||
361 | retval = -ENOMEM; | |
362 | pht = kzalloc(sizeof(*pht), GFP_KERNEL); | |
363 | if (pht == NULL) { | |
364 | dev_err(&pdev->dev, "unable to allocate device\n"); | |
365 | goto err_reg; | |
366 | } | |
367 | ||
368 | pht->caddr = pci_iomap(pdev, 0, 0); | |
369 | if (pht->caddr == NULL) { | |
370 | dev_err(&pdev->dev, "can't remap conf space\n"); | |
371 | goto err_fr; | |
372 | } | |
373 | pht->iaddr = pci_iomap(pdev, 2, 0); | |
374 | if (pht->iaddr == NULL) { | |
375 | dev_err(&pdev->dev, "can't remap input space\n"); | |
376 | goto err_unmc; | |
377 | } | |
378 | pht->oaddr = pci_iomap(pdev, 3, 0); | |
379 | if (pht->oaddr == NULL) { | |
380 | dev_err(&pdev->dev, "can't remap output space\n"); | |
381 | goto err_unmi; | |
382 | } | |
383 | ||
384 | mutex_init(&pht->open_lock); | |
bc552f77 | 385 | spin_lock_init(&pht->regs_lock); |
cef2cf07 JS |
386 | init_waitqueue_head(&pht->wait); |
387 | cdev_init(&pht->cdev, &phantom_file_ops); | |
388 | pht->cdev.owner = THIS_MODULE; | |
389 | ||
390 | iowrite32(0, pht->caddr + PHN_IRQCTL); | |
c8511f94 | 391 | ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */ |
cef2cf07 JS |
392 | retval = request_irq(pdev->irq, phantom_isr, |
393 | IRQF_SHARED | IRQF_DISABLED, "phantom", pht); | |
394 | if (retval) { | |
395 | dev_err(&pdev->dev, "can't establish ISR\n"); | |
396 | goto err_unmo; | |
397 | } | |
398 | ||
399 | retval = cdev_add(&pht->cdev, MKDEV(phantom_major, minor), 1); | |
400 | if (retval) { | |
401 | dev_err(&pdev->dev, "chardev registration failed\n"); | |
402 | goto err_irq; | |
403 | } | |
404 | ||
a9b12619 GKH |
405 | if (IS_ERR(device_create(phantom_class, &pdev->dev, |
406 | MKDEV(phantom_major, minor), NULL, | |
407 | "phantom%u", minor))) | |
cef2cf07 JS |
408 | dev_err(&pdev->dev, "can't create device\n"); |
409 | ||
410 | pci_set_drvdata(pdev, pht); | |
411 | ||
412 | return 0; | |
413 | err_irq: | |
414 | free_irq(pdev->irq, pht); | |
415 | err_unmo: | |
416 | pci_iounmap(pdev, pht->oaddr); | |
417 | err_unmi: | |
418 | pci_iounmap(pdev, pht->iaddr); | |
419 | err_unmc: | |
420 | pci_iounmap(pdev, pht->caddr); | |
421 | err_fr: | |
422 | kfree(pht); | |
423 | err_reg: | |
424 | pci_release_regions(pdev); | |
425 | err_null: | |
426 | phantom_devices[minor] = 0; | |
427 | err_dis: | |
428 | pci_disable_device(pdev); | |
429 | err: | |
430 | return retval; | |
431 | } | |
432 | ||
433 | static void __devexit phantom_remove(struct pci_dev *pdev) | |
434 | { | |
435 | struct phantom_device *pht = pci_get_drvdata(pdev); | |
436 | unsigned int minor = MINOR(pht->cdev.dev); | |
437 | ||
438 | device_destroy(phantom_class, MKDEV(phantom_major, minor)); | |
439 | ||
440 | cdev_del(&pht->cdev); | |
441 | ||
442 | iowrite32(0, pht->caddr + PHN_IRQCTL); | |
c8511f94 | 443 | ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */ |
cef2cf07 JS |
444 | free_irq(pdev->irq, pht); |
445 | ||
446 | pci_iounmap(pdev, pht->oaddr); | |
447 | pci_iounmap(pdev, pht->iaddr); | |
448 | pci_iounmap(pdev, pht->caddr); | |
449 | ||
450 | kfree(pht); | |
451 | ||
452 | pci_release_regions(pdev); | |
453 | ||
454 | phantom_devices[minor] = 0; | |
455 | ||
456 | pci_disable_device(pdev); | |
457 | } | |
458 | ||
459 | #ifdef CONFIG_PM | |
460 | static int phantom_suspend(struct pci_dev *pdev, pm_message_t state) | |
461 | { | |
462 | struct phantom_device *dev = pci_get_drvdata(pdev); | |
463 | ||
464 | iowrite32(0, dev->caddr + PHN_IRQCTL); | |
c8511f94 | 465 | ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */ |
cef2cf07 | 466 | |
aee8447c JS |
467 | synchronize_irq(pdev->irq); |
468 | ||
cef2cf07 JS |
469 | return 0; |
470 | } | |
471 | ||
472 | static int phantom_resume(struct pci_dev *pdev) | |
473 | { | |
474 | struct phantom_device *dev = pci_get_drvdata(pdev); | |
475 | ||
476 | iowrite32(0, dev->caddr + PHN_IRQCTL); | |
477 | ||
478 | return 0; | |
479 | } | |
480 | #else | |
481 | #define phantom_suspend NULL | |
482 | #define phantom_resume NULL | |
483 | #endif | |
484 | ||
485 | static struct pci_device_id phantom_pci_tbl[] __devinitdata = { | |
82f56087 JS |
486 | { .vendor = PCI_VENDOR_ID_PLX, .device = PCI_DEVICE_ID_PLX_9050, |
487 | .subvendor = PCI_VENDOR_ID_PLX, .subdevice = PCI_DEVICE_ID_PLX_9050, | |
488 | .class = PCI_CLASS_BRIDGE_OTHER << 8, .class_mask = 0xffff00 }, | |
cef2cf07 JS |
489 | { 0, } |
490 | }; | |
491 | MODULE_DEVICE_TABLE(pci, phantom_pci_tbl); | |
492 | ||
493 | static struct pci_driver phantom_pci_driver = { | |
494 | .name = "phantom", | |
495 | .id_table = phantom_pci_tbl, | |
496 | .probe = phantom_probe, | |
497 | .remove = __devexit_p(phantom_remove), | |
498 | .suspend = phantom_suspend, | |
499 | .resume = phantom_resume | |
500 | }; | |
501 | ||
0933e2d9 | 502 | static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION); |
cef2cf07 JS |
503 | |
504 | static int __init phantom_init(void) | |
505 | { | |
506 | int retval; | |
507 | dev_t dev; | |
508 | ||
509 | phantom_class = class_create(THIS_MODULE, "phantom"); | |
510 | if (IS_ERR(phantom_class)) { | |
511 | retval = PTR_ERR(phantom_class); | |
512 | printk(KERN_ERR "phantom: can't register phantom class\n"); | |
513 | goto err; | |
514 | } | |
0933e2d9 | 515 | retval = class_create_file(phantom_class, &class_attr_version.attr); |
cef2cf07 JS |
516 | if (retval) { |
517 | printk(KERN_ERR "phantom: can't create sysfs version file\n"); | |
518 | goto err_class; | |
519 | } | |
520 | ||
521 | retval = alloc_chrdev_region(&dev, 0, PHANTOM_MAX_MINORS, "phantom"); | |
522 | if (retval) { | |
523 | printk(KERN_ERR "phantom: can't register character device\n"); | |
524 | goto err_attr; | |
525 | } | |
526 | phantom_major = MAJOR(dev); | |
527 | ||
528 | retval = pci_register_driver(&phantom_pci_driver); | |
529 | if (retval) { | |
530 | printk(KERN_ERR "phantom: can't register pci driver\n"); | |
531 | goto err_unchr; | |
532 | } | |
533 | ||
534 | printk(KERN_INFO "Phantom Linux Driver, version " PHANTOM_VERSION ", " | |
535 | "init OK\n"); | |
536 | ||
537 | return 0; | |
538 | err_unchr: | |
539 | unregister_chrdev_region(dev, PHANTOM_MAX_MINORS); | |
540 | err_attr: | |
0933e2d9 | 541 | class_remove_file(phantom_class, &class_attr_version.attr); |
cef2cf07 JS |
542 | err_class: |
543 | class_destroy(phantom_class); | |
544 | err: | |
545 | return retval; | |
546 | } | |
547 | ||
548 | static void __exit phantom_exit(void) | |
549 | { | |
550 | pci_unregister_driver(&phantom_pci_driver); | |
551 | ||
552 | unregister_chrdev_region(MKDEV(phantom_major, 0), PHANTOM_MAX_MINORS); | |
553 | ||
0933e2d9 | 554 | class_remove_file(phantom_class, &class_attr_version.attr); |
cef2cf07 JS |
555 | class_destroy(phantom_class); |
556 | ||
557 | pr_debug("phantom: module successfully removed\n"); | |
558 | } | |
559 | ||
560 | module_init(phantom_init); | |
561 | module_exit(phantom_exit); | |
562 | ||
563 | MODULE_AUTHOR("Jiri Slaby <jirislaby@gmail.com>"); | |
ec905a18 | 564 | MODULE_DESCRIPTION("Sensable Phantom driver (PCI devices)"); |
cef2cf07 JS |
565 | MODULE_LICENSE("GPL"); |
566 | MODULE_VERSION(PHANTOM_VERSION); |