]>
Commit | Line | Data |
---|---|---|
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> |
613655fa | 27 | #include <linux/mutex.h> |
cef2cf07 | 28 | |
60063497 | 29 | #include <linux/atomic.h> |
cef2cf07 JS |
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 | 40 | |
613655fa | 41 | static DEFINE_MUTEX(phantom_mutex); |
cef2cf07 JS |
42 | static struct class *phantom_class; |
43 | static int phantom_major; | |
44 | ||
45 | struct phantom_device { | |
46 | unsigned int opened; | |
47 | void __iomem *caddr; | |
48 | u32 __iomem *iaddr; | |
49 | u32 __iomem *oaddr; | |
50 | unsigned long status; | |
51 | atomic_t counter; | |
52 | ||
53 | wait_queue_head_t wait; | |
54 | struct cdev cdev; | |
55 | ||
56 | struct mutex open_lock; | |
bc552f77 JS |
57 | spinlock_t regs_lock; |
58 | ||
59 | /* used in NOT_OH mode */ | |
60 | struct phm_regs oregs; | |
61 | u32 ctl_reg; | |
cef2cf07 JS |
62 | }; |
63 | ||
64 | static unsigned char phantom_devices[PHANTOM_MAX_MINORS]; | |
65 | ||
66 | static int phantom_status(struct phantom_device *dev, unsigned long newstat) | |
67 | { | |
68 | pr_debug("phantom_status %lx %lx\n", dev->status, newstat); | |
69 | ||
70 | if (!(dev->status & PHB_RUNNING) && (newstat & PHB_RUNNING)) { | |
71 | atomic_set(&dev->counter, 0); | |
72 | iowrite32(PHN_CTL_IRQ, dev->iaddr + PHN_CONTROL); | |
73 | iowrite32(0x43, dev->caddr + PHN_IRQCTL); | |
c8511f94 JS |
74 | ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */ |
75 | } else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) { | |
cef2cf07 | 76 | iowrite32(0, dev->caddr + PHN_IRQCTL); |
c8511f94 JS |
77 | ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */ |
78 | } | |
cef2cf07 JS |
79 | |
80 | dev->status = newstat; | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | /* | |
86 | * File ops | |
87 | */ | |
88 | ||
c15395c0 JS |
89 | static long phantom_ioctl(struct file *file, unsigned int cmd, |
90 | unsigned long arg) | |
cef2cf07 JS |
91 | { |
92 | struct phantom_device *dev = file->private_data; | |
93 | struct phm_regs rs; | |
94 | struct phm_reg r; | |
95 | void __user *argp = (void __user *)arg; | |
bc552f77 | 96 | unsigned long flags; |
cef2cf07 JS |
97 | unsigned int i; |
98 | ||
cef2cf07 | 99 | switch (cmd) { |
7e4e8e68 | 100 | case PHN_SETREG: |
cef2cf07 JS |
101 | case PHN_SET_REG: |
102 | if (copy_from_user(&r, argp, sizeof(r))) | |
103 | return -EFAULT; | |
104 | ||
105 | if (r.reg > 7) | |
106 | return -EINVAL; | |
107 | ||
bc552f77 | 108 | spin_lock_irqsave(&dev->regs_lock, flags); |
cef2cf07 | 109 | if (r.reg == PHN_CONTROL && (r.value & PHN_CTL_IRQ) && |
c15395c0 | 110 | phantom_status(dev, dev->status | PHB_RUNNING)){ |
bc552f77 | 111 | spin_unlock_irqrestore(&dev->regs_lock, flags); |
cef2cf07 | 112 | return -ENODEV; |
c15395c0 | 113 | } |
cef2cf07 JS |
114 | |
115 | pr_debug("phantom: writing %x to %u\n", r.value, r.reg); | |
bc552f77 JS |
116 | |
117 | /* preserve amp bit (don't allow to change it when in NOT_OH) */ | |
118 | if (r.reg == PHN_CONTROL && (dev->status & PHB_NOT_OH)) { | |
119 | r.value &= ~PHN_CTL_AMP; | |
120 | r.value |= dev->ctl_reg & PHN_CTL_AMP; | |
121 | dev->ctl_reg = r.value; | |
122 | } | |
123 | ||
cef2cf07 | 124 | iowrite32(r.value, dev->iaddr + r.reg); |
c8511f94 | 125 | ioread32(dev->iaddr); /* PCI posting */ |
cef2cf07 JS |
126 | |
127 | if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ)) | |
128 | phantom_status(dev, dev->status & ~PHB_RUNNING); | |
bc552f77 | 129 | spin_unlock_irqrestore(&dev->regs_lock, flags); |
cef2cf07 | 130 | break; |
7e4e8e68 | 131 | case PHN_SETREGS: |
cef2cf07 JS |
132 | case PHN_SET_REGS: |
133 | if (copy_from_user(&rs, argp, sizeof(rs))) | |
134 | return -EFAULT; | |
135 | ||
136 | pr_debug("phantom: SRS %u regs %x\n", rs.count, rs.mask); | |
bc552f77 JS |
137 | spin_lock_irqsave(&dev->regs_lock, flags); |
138 | if (dev->status & PHB_NOT_OH) | |
139 | memcpy(&dev->oregs, &rs, sizeof(rs)); | |
140 | else { | |
141 | u32 m = min(rs.count, 8U); | |
142 | for (i = 0; i < m; i++) | |
143 | if (rs.mask & BIT(i)) | |
144 | iowrite32(rs.values[i], dev->oaddr + i); | |
145 | ioread32(dev->iaddr); /* PCI posting */ | |
146 | } | |
147 | spin_unlock_irqrestore(&dev->regs_lock, flags); | |
cef2cf07 | 148 | break; |
7e4e8e68 | 149 | case PHN_GETREG: |
cef2cf07 JS |
150 | case PHN_GET_REG: |
151 | if (copy_from_user(&r, argp, sizeof(r))) | |
152 | return -EFAULT; | |
153 | ||
154 | if (r.reg > 7) | |
155 | return -EINVAL; | |
156 | ||
157 | r.value = ioread32(dev->iaddr + r.reg); | |
158 | ||
159 | if (copy_to_user(argp, &r, sizeof(r))) | |
160 | return -EFAULT; | |
161 | break; | |
7e4e8e68 | 162 | case PHN_GETREGS: |
bc552f77 JS |
163 | case PHN_GET_REGS: { |
164 | u32 m; | |
165 | ||
cef2cf07 JS |
166 | if (copy_from_user(&rs, argp, sizeof(rs))) |
167 | return -EFAULT; | |
168 | ||
bc552f77 JS |
169 | m = min(rs.count, 8U); |
170 | ||
cef2cf07 | 171 | pr_debug("phantom: GRS %u regs %x\n", rs.count, rs.mask); |
bc552f77 JS |
172 | spin_lock_irqsave(&dev->regs_lock, flags); |
173 | for (i = 0; i < m; i++) | |
174 | if (rs.mask & BIT(i)) | |
cef2cf07 | 175 | rs.values[i] = ioread32(dev->iaddr + i); |
7d4f9f09 | 176 | atomic_set(&dev->counter, 0); |
bc552f77 | 177 | spin_unlock_irqrestore(&dev->regs_lock, flags); |
cef2cf07 JS |
178 | |
179 | if (copy_to_user(argp, &rs, sizeof(rs))) | |
180 | return -EFAULT; | |
181 | break; | |
bc552f77 JS |
182 | } case PHN_NOT_OH: |
183 | spin_lock_irqsave(&dev->regs_lock, flags); | |
184 | if (dev->status & PHB_RUNNING) { | |
185 | printk(KERN_ERR "phantom: you need to set NOT_OH " | |
186 | "before you start the device!\n"); | |
187 | spin_unlock_irqrestore(&dev->regs_lock, flags); | |
188 | return -EINVAL; | |
189 | } | |
190 | dev->status |= PHB_NOT_OH; | |
191 | spin_unlock_irqrestore(&dev->regs_lock, flags); | |
192 | break; | |
cef2cf07 JS |
193 | default: |
194 | return -ENOTTY; | |
195 | } | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
7e4e8e68 JS |
200 | #ifdef CONFIG_COMPAT |
201 | static long phantom_compat_ioctl(struct file *filp, unsigned int cmd, | |
202 | unsigned long arg) | |
203 | { | |
204 | if (_IOC_NR(cmd) <= 3 && _IOC_SIZE(cmd) == sizeof(compat_uptr_t)) { | |
205 | cmd &= ~(_IOC_SIZEMASK << _IOC_SIZESHIFT); | |
206 | cmd |= sizeof(void *) << _IOC_SIZESHIFT; | |
207 | } | |
208 | return phantom_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); | |
209 | } | |
210 | #else | |
211 | #define phantom_compat_ioctl NULL | |
212 | #endif | |
213 | ||
cef2cf07 JS |
214 | static int phantom_open(struct inode *inode, struct file *file) |
215 | { | |
216 | struct phantom_device *dev = container_of(inode->i_cdev, | |
217 | struct phantom_device, cdev); | |
218 | ||
613655fa | 219 | mutex_lock(&phantom_mutex); |
cef2cf07 JS |
220 | nonseekable_open(inode, file); |
221 | ||
4541b5ec | 222 | if (mutex_lock_interruptible(&dev->open_lock)) { |
613655fa | 223 | mutex_unlock(&phantom_mutex); |
cef2cf07 | 224 | return -ERESTARTSYS; |
4541b5ec | 225 | } |
cef2cf07 JS |
226 | |
227 | if (dev->opened) { | |
228 | mutex_unlock(&dev->open_lock); | |
613655fa | 229 | mutex_unlock(&phantom_mutex); |
cef2cf07 JS |
230 | return -EINVAL; |
231 | } | |
232 | ||
bc552f77 JS |
233 | WARN_ON(dev->status & PHB_NOT_OH); |
234 | ||
cef2cf07 JS |
235 | file->private_data = dev; |
236 | ||
bc552f77 | 237 | atomic_set(&dev->counter, 0); |
cef2cf07 JS |
238 | dev->opened++; |
239 | mutex_unlock(&dev->open_lock); | |
613655fa | 240 | mutex_unlock(&phantom_mutex); |
cef2cf07 JS |
241 | return 0; |
242 | } | |
243 | ||
244 | static int phantom_release(struct inode *inode, struct file *file) | |
245 | { | |
246 | struct phantom_device *dev = file->private_data; | |
247 | ||
248 | mutex_lock(&dev->open_lock); | |
249 | ||
250 | dev->opened = 0; | |
251 | phantom_status(dev, dev->status & ~PHB_RUNNING); | |
bc552f77 | 252 | dev->status &= ~PHB_NOT_OH; |
cef2cf07 JS |
253 | |
254 | mutex_unlock(&dev->open_lock); | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | static unsigned int phantom_poll(struct file *file, poll_table *wait) | |
260 | { | |
261 | struct phantom_device *dev = file->private_data; | |
262 | unsigned int mask = 0; | |
263 | ||
264 | pr_debug("phantom_poll: %d\n", atomic_read(&dev->counter)); | |
265 | poll_wait(file, &dev->wait, wait); | |
7d4f9f09 JS |
266 | |
267 | if (!(dev->status & PHB_RUNNING)) | |
268 | mask = POLLERR; | |
269 | else if (atomic_read(&dev->counter)) | |
cef2cf07 | 270 | mask = POLLIN | POLLRDNORM; |
7d4f9f09 | 271 | |
cef2cf07 JS |
272 | pr_debug("phantom_poll end: %x/%d\n", mask, atomic_read(&dev->counter)); |
273 | ||
274 | return mask; | |
275 | } | |
276 | ||
828c0950 | 277 | static const struct file_operations phantom_file_ops = { |
cef2cf07 JS |
278 | .open = phantom_open, |
279 | .release = phantom_release, | |
c15395c0 | 280 | .unlocked_ioctl = phantom_ioctl, |
7e4e8e68 | 281 | .compat_ioctl = phantom_compat_ioctl, |
cef2cf07 | 282 | .poll = phantom_poll, |
6038f373 | 283 | .llseek = no_llseek, |
cef2cf07 JS |
284 | }; |
285 | ||
286 | static irqreturn_t phantom_isr(int irq, void *data) | |
287 | { | |
288 | struct phantom_device *dev = data; | |
bc552f77 JS |
289 | unsigned int i; |
290 | u32 ctl; | |
cef2cf07 | 291 | |
bc552f77 JS |
292 | spin_lock(&dev->regs_lock); |
293 | ctl = ioread32(dev->iaddr + PHN_CONTROL); | |
294 | if (!(ctl & PHN_CTL_IRQ)) { | |
295 | spin_unlock(&dev->regs_lock); | |
cef2cf07 | 296 | return IRQ_NONE; |
bc552f77 | 297 | } |
cef2cf07 JS |
298 | |
299 | iowrite32(0, dev->iaddr); | |
300 | iowrite32(0xc0, dev->iaddr); | |
bc552f77 JS |
301 | |
302 | if (dev->status & PHB_NOT_OH) { | |
303 | struct phm_regs *r = &dev->oregs; | |
304 | u32 m = min(r->count, 8U); | |
305 | ||
306 | for (i = 0; i < m; i++) | |
307 | if (r->mask & BIT(i)) | |
308 | iowrite32(r->values[i], dev->oaddr + i); | |
309 | ||
310 | dev->ctl_reg ^= PHN_CTL_AMP; | |
311 | iowrite32(dev->ctl_reg, dev->iaddr + PHN_CONTROL); | |
312 | } | |
313 | spin_unlock(&dev->regs_lock); | |
314 | ||
c8511f94 | 315 | ioread32(dev->iaddr); /* PCI posting */ |
cef2cf07 JS |
316 | |
317 | atomic_inc(&dev->counter); | |
318 | wake_up_interruptible(&dev->wait); | |
319 | ||
320 | return IRQ_HANDLED; | |
321 | } | |
322 | ||
323 | /* | |
324 | * Init and deinit driver | |
325 | */ | |
326 | ||
80c8ae28 | 327 | static unsigned int phantom_get_free(void) |
cef2cf07 JS |
328 | { |
329 | unsigned int i; | |
330 | ||
331 | for (i = 0; i < PHANTOM_MAX_MINORS; i++) | |
332 | if (phantom_devices[i] == 0) | |
333 | break; | |
334 | ||
335 | return i; | |
336 | } | |
337 | ||
80c8ae28 | 338 | static int phantom_probe(struct pci_dev *pdev, |
cef2cf07 JS |
339 | const struct pci_device_id *pci_id) |
340 | { | |
341 | struct phantom_device *pht; | |
342 | unsigned int minor; | |
343 | int retval; | |
344 | ||
345 | retval = pci_enable_device(pdev); | |
10ad5278 RR |
346 | if (retval) { |
347 | dev_err(&pdev->dev, "pci_enable_device failed!\n"); | |
cef2cf07 | 348 | goto err; |
10ad5278 | 349 | } |
cef2cf07 JS |
350 | |
351 | minor = phantom_get_free(); | |
352 | if (minor == PHANTOM_MAX_MINORS) { | |
353 | dev_err(&pdev->dev, "too many devices found!\n"); | |
354 | retval = -EIO; | |
355 | goto err_dis; | |
356 | } | |
357 | ||
358 | phantom_devices[minor] = 1; | |
359 | ||
360 | retval = pci_request_regions(pdev, "phantom"); | |
10ad5278 RR |
361 | if (retval) { |
362 | dev_err(&pdev->dev, "pci_request_regions failed!\n"); | |
cef2cf07 | 363 | goto err_null; |
10ad5278 | 364 | } |
cef2cf07 JS |
365 | |
366 | retval = -ENOMEM; | |
367 | pht = kzalloc(sizeof(*pht), GFP_KERNEL); | |
368 | if (pht == NULL) { | |
369 | dev_err(&pdev->dev, "unable to allocate device\n"); | |
370 | goto err_reg; | |
371 | } | |
372 | ||
373 | pht->caddr = pci_iomap(pdev, 0, 0); | |
374 | if (pht->caddr == NULL) { | |
375 | dev_err(&pdev->dev, "can't remap conf space\n"); | |
376 | goto err_fr; | |
377 | } | |
378 | pht->iaddr = pci_iomap(pdev, 2, 0); | |
379 | if (pht->iaddr == NULL) { | |
380 | dev_err(&pdev->dev, "can't remap input space\n"); | |
381 | goto err_unmc; | |
382 | } | |
383 | pht->oaddr = pci_iomap(pdev, 3, 0); | |
384 | if (pht->oaddr == NULL) { | |
385 | dev_err(&pdev->dev, "can't remap output space\n"); | |
386 | goto err_unmi; | |
387 | } | |
388 | ||
389 | mutex_init(&pht->open_lock); | |
bc552f77 | 390 | spin_lock_init(&pht->regs_lock); |
cef2cf07 JS |
391 | init_waitqueue_head(&pht->wait); |
392 | cdev_init(&pht->cdev, &phantom_file_ops); | |
393 | pht->cdev.owner = THIS_MODULE; | |
394 | ||
395 | iowrite32(0, pht->caddr + PHN_IRQCTL); | |
c8511f94 | 396 | ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */ |
cef2cf07 JS |
397 | retval = request_irq(pdev->irq, phantom_isr, |
398 | IRQF_SHARED | IRQF_DISABLED, "phantom", pht); | |
399 | if (retval) { | |
400 | dev_err(&pdev->dev, "can't establish ISR\n"); | |
401 | goto err_unmo; | |
402 | } | |
403 | ||
404 | retval = cdev_add(&pht->cdev, MKDEV(phantom_major, minor), 1); | |
405 | if (retval) { | |
406 | dev_err(&pdev->dev, "chardev registration failed\n"); | |
407 | goto err_irq; | |
408 | } | |
409 | ||
a9b12619 GKH |
410 | if (IS_ERR(device_create(phantom_class, &pdev->dev, |
411 | MKDEV(phantom_major, minor), NULL, | |
412 | "phantom%u", minor))) | |
cef2cf07 JS |
413 | dev_err(&pdev->dev, "can't create device\n"); |
414 | ||
415 | pci_set_drvdata(pdev, pht); | |
416 | ||
417 | return 0; | |
418 | err_irq: | |
419 | free_irq(pdev->irq, pht); | |
420 | err_unmo: | |
421 | pci_iounmap(pdev, pht->oaddr); | |
422 | err_unmi: | |
423 | pci_iounmap(pdev, pht->iaddr); | |
424 | err_unmc: | |
425 | pci_iounmap(pdev, pht->caddr); | |
426 | err_fr: | |
427 | kfree(pht); | |
428 | err_reg: | |
429 | pci_release_regions(pdev); | |
430 | err_null: | |
431 | phantom_devices[minor] = 0; | |
432 | err_dis: | |
433 | pci_disable_device(pdev); | |
434 | err: | |
435 | return retval; | |
436 | } | |
437 | ||
486a5c28 | 438 | static void phantom_remove(struct pci_dev *pdev) |
cef2cf07 JS |
439 | { |
440 | struct phantom_device *pht = pci_get_drvdata(pdev); | |
441 | unsigned int minor = MINOR(pht->cdev.dev); | |
442 | ||
443 | device_destroy(phantom_class, MKDEV(phantom_major, minor)); | |
444 | ||
445 | cdev_del(&pht->cdev); | |
446 | ||
447 | iowrite32(0, pht->caddr + PHN_IRQCTL); | |
c8511f94 | 448 | ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */ |
cef2cf07 JS |
449 | free_irq(pdev->irq, pht); |
450 | ||
451 | pci_iounmap(pdev, pht->oaddr); | |
452 | pci_iounmap(pdev, pht->iaddr); | |
453 | pci_iounmap(pdev, pht->caddr); | |
454 | ||
455 | kfree(pht); | |
456 | ||
457 | pci_release_regions(pdev); | |
458 | ||
459 | phantom_devices[minor] = 0; | |
460 | ||
461 | pci_disable_device(pdev); | |
462 | } | |
463 | ||
464 | #ifdef CONFIG_PM | |
465 | static int phantom_suspend(struct pci_dev *pdev, pm_message_t state) | |
466 | { | |
467 | struct phantom_device *dev = pci_get_drvdata(pdev); | |
468 | ||
469 | iowrite32(0, dev->caddr + PHN_IRQCTL); | |
c8511f94 | 470 | ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */ |
cef2cf07 | 471 | |
aee8447c JS |
472 | synchronize_irq(pdev->irq); |
473 | ||
cef2cf07 JS |
474 | return 0; |
475 | } | |
476 | ||
477 | static int phantom_resume(struct pci_dev *pdev) | |
478 | { | |
479 | struct phantom_device *dev = pci_get_drvdata(pdev); | |
480 | ||
481 | iowrite32(0, dev->caddr + PHN_IRQCTL); | |
482 | ||
483 | return 0; | |
484 | } | |
485 | #else | |
486 | #define phantom_suspend NULL | |
487 | #define phantom_resume NULL | |
488 | #endif | |
489 | ||
2c685064 | 490 | static struct pci_device_id phantom_pci_tbl[] = { |
82f56087 JS |
491 | { .vendor = PCI_VENDOR_ID_PLX, .device = PCI_DEVICE_ID_PLX_9050, |
492 | .subvendor = PCI_VENDOR_ID_PLX, .subdevice = PCI_DEVICE_ID_PLX_9050, | |
493 | .class = PCI_CLASS_BRIDGE_OTHER << 8, .class_mask = 0xffff00 }, | |
cef2cf07 JS |
494 | { 0, } |
495 | }; | |
496 | MODULE_DEVICE_TABLE(pci, phantom_pci_tbl); | |
497 | ||
498 | static struct pci_driver phantom_pci_driver = { | |
499 | .name = "phantom", | |
500 | .id_table = phantom_pci_tbl, | |
501 | .probe = phantom_probe, | |
2d6bed9c | 502 | .remove = phantom_remove, |
cef2cf07 JS |
503 | .suspend = phantom_suspend, |
504 | .resume = phantom_resume | |
505 | }; | |
506 | ||
0933e2d9 | 507 | static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION); |
cef2cf07 JS |
508 | |
509 | static int __init phantom_init(void) | |
510 | { | |
511 | int retval; | |
512 | dev_t dev; | |
513 | ||
514 | phantom_class = class_create(THIS_MODULE, "phantom"); | |
515 | if (IS_ERR(phantom_class)) { | |
516 | retval = PTR_ERR(phantom_class); | |
517 | printk(KERN_ERR "phantom: can't register phantom class\n"); | |
518 | goto err; | |
519 | } | |
0933e2d9 | 520 | retval = class_create_file(phantom_class, &class_attr_version.attr); |
cef2cf07 JS |
521 | if (retval) { |
522 | printk(KERN_ERR "phantom: can't create sysfs version file\n"); | |
523 | goto err_class; | |
524 | } | |
525 | ||
526 | retval = alloc_chrdev_region(&dev, 0, PHANTOM_MAX_MINORS, "phantom"); | |
527 | if (retval) { | |
528 | printk(KERN_ERR "phantom: can't register character device\n"); | |
529 | goto err_attr; | |
530 | } | |
531 | phantom_major = MAJOR(dev); | |
532 | ||
533 | retval = pci_register_driver(&phantom_pci_driver); | |
534 | if (retval) { | |
535 | printk(KERN_ERR "phantom: can't register pci driver\n"); | |
536 | goto err_unchr; | |
537 | } | |
538 | ||
539 | printk(KERN_INFO "Phantom Linux Driver, version " PHANTOM_VERSION ", " | |
540 | "init OK\n"); | |
541 | ||
542 | return 0; | |
543 | err_unchr: | |
544 | unregister_chrdev_region(dev, PHANTOM_MAX_MINORS); | |
545 | err_attr: | |
0933e2d9 | 546 | class_remove_file(phantom_class, &class_attr_version.attr); |
cef2cf07 JS |
547 | err_class: |
548 | class_destroy(phantom_class); | |
549 | err: | |
550 | return retval; | |
551 | } | |
552 | ||
553 | static void __exit phantom_exit(void) | |
554 | { | |
555 | pci_unregister_driver(&phantom_pci_driver); | |
556 | ||
557 | unregister_chrdev_region(MKDEV(phantom_major, 0), PHANTOM_MAX_MINORS); | |
558 | ||
0933e2d9 | 559 | class_remove_file(phantom_class, &class_attr_version.attr); |
cef2cf07 JS |
560 | class_destroy(phantom_class); |
561 | ||
562 | pr_debug("phantom: module successfully removed\n"); | |
563 | } | |
564 | ||
565 | module_init(phantom_init); | |
566 | module_exit(phantom_exit); | |
567 | ||
568 | MODULE_AUTHOR("Jiri Slaby <jirislaby@gmail.com>"); | |
ec905a18 | 569 | MODULE_DESCRIPTION("Sensable Phantom driver (PCI devices)"); |
cef2cf07 JS |
570 | MODULE_LICENSE("GPL"); |
571 | MODULE_VERSION(PHANTOM_VERSION); |