blob: 30754927fd80d584881b3ce5475ddef874bb353c [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 Schwarzer0211a9c82008-12-29 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>
Arnd Bergmann613655f2010-06-02 14:28:52 +020027#include <linux/mutex.h>
Jiri Slabycef2cf02007-05-08 00:31:45 -070028
Arun Sharma600634972011-07-26 16:09:06 -070029#include <linux/atomic.h>
Jiri Slabycef2cf02007-05-08 00:31:45 -070030#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
Arnd Bergmann613655f2010-06-02 14:28:52 +020041static DEFINE_MUTEX(phantom_mutex);
Jiri Slabycef2cf02007-05-08 00:31:45 -070042static struct class *phantom_class;
43static int phantom_major;
44
45struct 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;
Jiri Slabybc552f72007-10-18 23:40:24 -070057 spinlock_t regs_lock;
58
59 /* used in NOT_OH mode */
60 struct phm_regs oregs;
61 u32 ctl_reg;
Jiri Slabycef2cf02007-05-08 00:31:45 -070062};
63
64static unsigned char phantom_devices[PHANTOM_MAX_MINORS];
65
66static 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);
Jiri Slabyc8511f942007-05-23 13:57:59 -070074 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
75 } else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) {
Jiri Slabycef2cf02007-05-08 00:31:45 -070076 iowrite32(0, dev->caddr + PHN_IRQCTL);
Jiri Slabyc8511f942007-05-23 13:57:59 -070077 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
78 }
Jiri Slabycef2cf02007-05-08 00:31:45 -070079
80 dev->status = newstat;
81
82 return 0;
83}
84
85/*
86 * File ops
87 */
88
Jiri Slabyc15395c2007-05-23 13:57:58 -070089static long phantom_ioctl(struct file *file, unsigned int cmd,
90 unsigned long arg)
Jiri Slabycef2cf02007-05-08 00:31:45 -070091{
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;
Jiri Slabybc552f72007-10-18 23:40:24 -070096 unsigned long flags;
Jiri Slabycef2cf02007-05-08 00:31:45 -070097 unsigned int i;
98
Jiri Slabycef2cf02007-05-08 00:31:45 -070099 switch (cmd) {
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700100 case PHN_SETREG:
Jiri Slabycef2cf02007-05-08 00:31:45 -0700101 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
Jiri Slabybc552f72007-10-18 23:40:24 -0700108 spin_lock_irqsave(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700109 if (r.reg == PHN_CONTROL && (r.value & PHN_CTL_IRQ) &&
Jiri Slabyc15395c2007-05-23 13:57:58 -0700110 phantom_status(dev, dev->status | PHB_RUNNING)){
Jiri Slabybc552f72007-10-18 23:40:24 -0700111 spin_unlock_irqrestore(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700112 return -ENODEV;
Jiri Slabyc15395c2007-05-23 13:57:58 -0700113 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700114
115 pr_debug("phantom: writing %x to %u\n", r.value, r.reg);
Jiri Slabybc552f72007-10-18 23:40:24 -0700116
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
Jiri Slabycef2cf02007-05-08 00:31:45 -0700124 iowrite32(r.value, dev->iaddr + r.reg);
Jiri Slabyc8511f942007-05-23 13:57:59 -0700125 ioread32(dev->iaddr); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700126
127 if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ))
128 phantom_status(dev, dev->status & ~PHB_RUNNING);
Jiri Slabybc552f72007-10-18 23:40:24 -0700129 spin_unlock_irqrestore(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700130 break;
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700131 case PHN_SETREGS:
Jiri Slabycef2cf02007-05-08 00:31:45 -0700132 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);
Jiri Slabybc552f72007-10-18 23:40:24 -0700137 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);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700148 break;
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700149 case PHN_GETREG:
Jiri Slabycef2cf02007-05-08 00:31:45 -0700150 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;
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700162 case PHN_GETREGS:
Jiri Slabybc552f72007-10-18 23:40:24 -0700163 case PHN_GET_REGS: {
164 u32 m;
165
Jiri Slabycef2cf02007-05-08 00:31:45 -0700166 if (copy_from_user(&rs, argp, sizeof(rs)))
167 return -EFAULT;
168
Jiri Slabybc552f72007-10-18 23:40:24 -0700169 m = min(rs.count, 8U);
170
Jiri Slabycef2cf02007-05-08 00:31:45 -0700171 pr_debug("phantom: GRS %u regs %x\n", rs.count, rs.mask);
Jiri Slabybc552f72007-10-18 23:40:24 -0700172 spin_lock_irqsave(&dev->regs_lock, flags);
173 for (i = 0; i < m; i++)
174 if (rs.mask & BIT(i))
Jiri Slabycef2cf02007-05-08 00:31:45 -0700175 rs.values[i] = ioread32(dev->iaddr + i);
Jiri Slaby7d4f9f02008-04-29 00:59:14 -0700176 atomic_set(&dev->counter, 0);
Jiri Slabybc552f72007-10-18 23:40:24 -0700177 spin_unlock_irqrestore(&dev->regs_lock, flags);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700178
179 if (copy_to_user(argp, &rs, sizeof(rs)))
180 return -EFAULT;
181 break;
Jiri Slabybc552f72007-10-18 23:40:24 -0700182 } 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;
Jiri Slabycef2cf02007-05-08 00:31:45 -0700193 default:
194 return -ENOTTY;
195 }
196
197 return 0;
198}
199
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700200#ifdef CONFIG_COMPAT
201static 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
Jiri Slabycef2cf02007-05-08 00:31:45 -0700214static 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
Arnd Bergmann613655f2010-06-02 14:28:52 +0200219 mutex_lock(&phantom_mutex);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700220 nonseekable_open(inode, file);
221
Jonathan Corbet4541b5e2008-05-16 14:03:05 -0600222 if (mutex_lock_interruptible(&dev->open_lock)) {
Arnd Bergmann613655f2010-06-02 14:28:52 +0200223 mutex_unlock(&phantom_mutex);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700224 return -ERESTARTSYS;
Jonathan Corbet4541b5e2008-05-16 14:03:05 -0600225 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700226
227 if (dev->opened) {
228 mutex_unlock(&dev->open_lock);
Arnd Bergmann613655f2010-06-02 14:28:52 +0200229 mutex_unlock(&phantom_mutex);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700230 return -EINVAL;
231 }
232
Jiri Slabybc552f72007-10-18 23:40:24 -0700233 WARN_ON(dev->status & PHB_NOT_OH);
234
Jiri Slabycef2cf02007-05-08 00:31:45 -0700235 file->private_data = dev;
236
Jiri Slabybc552f72007-10-18 23:40:24 -0700237 atomic_set(&dev->counter, 0);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700238 dev->opened++;
239 mutex_unlock(&dev->open_lock);
Arnd Bergmann613655f2010-06-02 14:28:52 +0200240 mutex_unlock(&phantom_mutex);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700241 return 0;
242}
243
244static 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);
Jiri Slabybc552f72007-10-18 23:40:24 -0700252 dev->status &= ~PHB_NOT_OH;
Jiri Slabycef2cf02007-05-08 00:31:45 -0700253
254 mutex_unlock(&dev->open_lock);
255
256 return 0;
257}
258
259static 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);
Jiri Slaby7d4f9f02008-04-29 00:59:14 -0700266
267 if (!(dev->status & PHB_RUNNING))
268 mask = POLLERR;
269 else if (atomic_read(&dev->counter))
Jiri Slabycef2cf02007-05-08 00:31:45 -0700270 mask = POLLIN | POLLRDNORM;
Jiri Slaby7d4f9f02008-04-29 00:59:14 -0700271
Jiri Slabycef2cf02007-05-08 00:31:45 -0700272 pr_debug("phantom_poll end: %x/%d\n", mask, atomic_read(&dev->counter));
273
274 return mask;
275}
276
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700277static const struct file_operations phantom_file_ops = {
Jiri Slabycef2cf02007-05-08 00:31:45 -0700278 .open = phantom_open,
279 .release = phantom_release,
Jiri Slabyc15395c2007-05-23 13:57:58 -0700280 .unlocked_ioctl = phantom_ioctl,
Jiri Slaby7e4e8e62008-04-29 00:59:13 -0700281 .compat_ioctl = phantom_compat_ioctl,
Jiri Slabycef2cf02007-05-08 00:31:45 -0700282 .poll = phantom_poll,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200283 .llseek = no_llseek,
Jiri Slabycef2cf02007-05-08 00:31:45 -0700284};
285
286static irqreturn_t phantom_isr(int irq, void *data)
287{
288 struct phantom_device *dev = data;
Jiri Slabybc552f72007-10-18 23:40:24 -0700289 unsigned int i;
290 u32 ctl;
Jiri Slabycef2cf02007-05-08 00:31:45 -0700291
Jiri Slabybc552f72007-10-18 23:40:24 -0700292 spin_lock(&dev->regs_lock);
293 ctl = ioread32(dev->iaddr + PHN_CONTROL);
294 if (!(ctl & PHN_CTL_IRQ)) {
295 spin_unlock(&dev->regs_lock);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700296 return IRQ_NONE;
Jiri Slabybc552f72007-10-18 23:40:24 -0700297 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700298
299 iowrite32(0, dev->iaddr);
300 iowrite32(0xc0, dev->iaddr);
Jiri Slabybc552f72007-10-18 23:40:24 -0700301
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
Jiri Slabyc8511f942007-05-23 13:57:59 -0700315 ioread32(dev->iaddr); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700316
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
Bill Pemberton80c8ae22012-11-19 13:23:05 -0500327static unsigned int phantom_get_free(void)
Jiri Slabycef2cf02007-05-08 00:31:45 -0700328{
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
Bill Pemberton80c8ae22012-11-19 13:23:05 -0500338static int phantom_probe(struct pci_dev *pdev,
Jiri Slabycef2cf02007-05-08 00:31:45 -0700339 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);
Rahul Ruikar10ad5272010-10-26 14:22:35 -0700346 if (retval) {
347 dev_err(&pdev->dev, "pci_enable_device failed!\n");
Jiri Slabycef2cf02007-05-08 00:31:45 -0700348 goto err;
Rahul Ruikar10ad5272010-10-26 14:22:35 -0700349 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700350
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");
Rahul Ruikar10ad5272010-10-26 14:22:35 -0700361 if (retval) {
362 dev_err(&pdev->dev, "pci_request_regions failed!\n");
Jiri Slabycef2cf02007-05-08 00:31:45 -0700363 goto err_null;
Rahul Ruikar10ad5272010-10-26 14:22:35 -0700364 }
Jiri Slabycef2cf02007-05-08 00:31:45 -0700365
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);
Jiri Slabybc552f72007-10-18 23:40:24 -0700390 spin_lock_init(&pht->regs_lock);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700391 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);
Jiri Slabyc8511f942007-05-23 13:57:59 -0700396 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700397 retval = request_irq(pdev->irq, phantom_isr,
Michael Opdenackerbb9da882013-10-13 08:16:07 +0200398 IRQF_SHARED, "phantom", pht);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700399 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
Greg Kroah-Hartmana9b12612008-07-21 20:03:34 -0700410 if (IS_ERR(device_create(phantom_class, &pdev->dev,
411 MKDEV(phantom_major, minor), NULL,
412 "phantom%u", minor)))
Jiri Slabycef2cf02007-05-08 00:31:45 -0700413 dev_err(&pdev->dev, "can't create device\n");
414
415 pci_set_drvdata(pdev, pht);
416
417 return 0;
418err_irq:
419 free_irq(pdev->irq, pht);
420err_unmo:
421 pci_iounmap(pdev, pht->oaddr);
422err_unmi:
423 pci_iounmap(pdev, pht->iaddr);
424err_unmc:
425 pci_iounmap(pdev, pht->caddr);
426err_fr:
427 kfree(pht);
428err_reg:
429 pci_release_regions(pdev);
430err_null:
431 phantom_devices[minor] = 0;
432err_dis:
433 pci_disable_device(pdev);
434err:
435 return retval;
436}
437
Bill Pemberton486a5c22012-11-19 13:26:02 -0500438static void phantom_remove(struct pci_dev *pdev)
Jiri Slabycef2cf02007-05-08 00:31:45 -0700439{
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);
Jiri Slabyc8511f942007-05-23 13:57:59 -0700448 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700449 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
465static 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);
Jiri Slabyc8511f942007-05-23 13:57:59 -0700470 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
Jiri Slabycef2cf02007-05-08 00:31:45 -0700471
Jiri Slabyaee84472007-10-18 23:40:23 -0700472 synchronize_irq(pdev->irq);
473
Jiri Slabycef2cf02007-05-08 00:31:45 -0700474 return 0;
475}
476
477static 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
Bill Pemberton2c685062012-11-19 13:24:38 -0500490static struct pci_device_id phantom_pci_tbl[] = {
Jiri Slaby82f56082008-02-06 01:38:03 -0800491 { .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 },
Jiri Slabycef2cf02007-05-08 00:31:45 -0700494 { 0, }
495};
496MODULE_DEVICE_TABLE(pci, phantom_pci_tbl);
497
498static struct pci_driver phantom_pci_driver = {
499 .name = "phantom",
500 .id_table = phantom_pci_tbl,
501 .probe = phantom_probe,
Bill Pemberton2d6bed92012-11-19 13:21:23 -0500502 .remove = phantom_remove,
Jiri Slabycef2cf02007-05-08 00:31:45 -0700503 .suspend = phantom_suspend,
504 .resume = phantom_resume
505};
506
Andi Kleen0933e2d2010-01-05 12:48:09 +0100507static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700508
509static 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 }
Andi Kleen0933e2d2010-01-05 12:48:09 +0100520 retval = class_create_file(phantom_class, &class_attr_version.attr);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700521 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;
543err_unchr:
544 unregister_chrdev_region(dev, PHANTOM_MAX_MINORS);
545err_attr:
Andi Kleen0933e2d2010-01-05 12:48:09 +0100546 class_remove_file(phantom_class, &class_attr_version.attr);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700547err_class:
548 class_destroy(phantom_class);
549err:
550 return retval;
551}
552
553static 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
Andi Kleen0933e2d2010-01-05 12:48:09 +0100559 class_remove_file(phantom_class, &class_attr_version.attr);
Jiri Slabycef2cf02007-05-08 00:31:45 -0700560 class_destroy(phantom_class);
561
562 pr_debug("phantom: module successfully removed\n");
563}
564
565module_init(phantom_init);
566module_exit(phantom_exit);
567
568MODULE_AUTHOR("Jiri Slaby <jirislaby@gmail.com>");
Jiri Slabyec905a12008-07-25 01:48:23 -0700569MODULE_DESCRIPTION("Sensable Phantom driver (PCI devices)");
Jiri Slabycef2cf02007-05-08 00:31:45 -0700570MODULE_LICENSE("GPL");
571MODULE_VERSION(PHANTOM_VERSION);