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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 *
9 * You need a userspace library to cooperate with this driver. It (and other
10 * info) may be obtained here:
11 * http://www.fi.muni.cz/~xslaby/phantom.html
12 * or alternatively, you might use OpenHaptics provided by Sensable.
13 */
14
15#include <linux/compat.h>
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>
24#include <linux/slab.h>
25#include <linux/phantom.h>
26#include <linux/sched.h>
27#include <linux/mutex.h>
28
29#include <linux/atomic.h>
30#include <asm/io.h>
31
32#define PHANTOM_VERSION "n0.9.8"
33
34#define PHANTOM_MAX_MINORS 8
35
36#define PHN_IRQCTL 0x4c /* irq control in caddr space */
37
38#define PHB_RUNNING 1
39#define PHB_NOT_OH 2
40
41static DEFINE_MUTEX(phantom_mutex);
42static 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;
57 spinlock_t regs_lock;
58
59 /* used in NOT_OH mode */
60 struct phm_regs oregs;
61 u32 ctl_reg;
62};
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);
74 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
75 } else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) {
76 iowrite32(0, dev->caddr + PHN_IRQCTL);
77 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
78 }
79
80 dev->status = newstat;
81
82 return 0;
83}
84
85/*
86 * File ops
87 */
88
89static long phantom_ioctl(struct file *file, unsigned int cmd,
90 unsigned long arg)
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;
96 unsigned long flags;
97 unsigned int i;
98
99 switch (cmd) {
100 case PHN_SETREG:
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
108 spin_lock_irqsave(&dev->regs_lock, flags);
109 if (r.reg == PHN_CONTROL && (r.value & PHN_CTL_IRQ) &&
110 phantom_status(dev, dev->status | PHB_RUNNING)){
111 spin_unlock_irqrestore(&dev->regs_lock, flags);
112 return -ENODEV;
113 }
114
115 pr_debug("phantom: writing %x to %u\n", r.value, r.reg);
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
124 iowrite32(r.value, dev->iaddr + r.reg);
125 ioread32(dev->iaddr); /* PCI posting */
126
127 if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ))
128 phantom_status(dev, dev->status & ~PHB_RUNNING);
129 spin_unlock_irqrestore(&dev->regs_lock, flags);
130 break;
131 case PHN_SETREGS:
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);
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);
148 break;
149 case PHN_GETREG:
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;
162 case PHN_GETREGS:
163 case PHN_GET_REGS: {
164 u32 m;
165
166 if (copy_from_user(&rs, argp, sizeof(rs)))
167 return -EFAULT;
168
169 m = min(rs.count, 8U);
170
171 pr_debug("phantom: GRS %u regs %x\n", rs.count, rs.mask);
172 spin_lock_irqsave(&dev->regs_lock, flags);
173 for (i = 0; i < m; i++)
174 if (rs.mask & BIT(i))
175 rs.values[i] = ioread32(dev->iaddr + i);
176 atomic_set(&dev->counter, 0);
177 spin_unlock_irqrestore(&dev->regs_lock, flags);
178
179 if (copy_to_user(argp, &rs, sizeof(rs)))
180 return -EFAULT;
181 break;
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;
193 default:
194 return -ENOTTY;
195 }
196
197 return 0;
198}
199
200#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
214static 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
219 mutex_lock(&phantom_mutex);
220 nonseekable_open(inode, file);
221
222 if (mutex_lock_interruptible(&dev->open_lock)) {
223 mutex_unlock(&phantom_mutex);
224 return -ERESTARTSYS;
225 }
226
227 if (dev->opened) {
228 mutex_unlock(&dev->open_lock);
229 mutex_unlock(&phantom_mutex);
230 return -EINVAL;
231 }
232
233 WARN_ON(dev->status & PHB_NOT_OH);
234
235 file->private_data = dev;
236
237 atomic_set(&dev->counter, 0);
238 dev->opened++;
239 mutex_unlock(&dev->open_lock);
240 mutex_unlock(&phantom_mutex);
241 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);
252 dev->status &= ~PHB_NOT_OH;
253
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);
266
267 if (!(dev->status & PHB_RUNNING))
268 mask = POLLERR;
269 else if (atomic_read(&dev->counter))
270 mask = POLLIN | POLLRDNORM;
271
272 pr_debug("phantom_poll end: %x/%d\n", mask, atomic_read(&dev->counter));
273
274 return mask;
275}
276
277static const struct file_operations phantom_file_ops = {
278 .open = phantom_open,
279 .release = phantom_release,
280 .unlocked_ioctl = phantom_ioctl,
281 .compat_ioctl = phantom_compat_ioctl,
282 .poll = phantom_poll,
283 .llseek = no_llseek,
284};
285
286static irqreturn_t phantom_isr(int irq, void *data)
287{
288 struct phantom_device *dev = data;
289 unsigned int i;
290 u32 ctl;
291
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);
296 return IRQ_NONE;
297 }
298
299 iowrite32(0, dev->iaddr);
300 iowrite32(0xc0, dev->iaddr);
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
315 ioread32(dev->iaddr); /* PCI posting */
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
327static unsigned int phantom_get_free(void)
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
338static int phantom_probe(struct pci_dev *pdev,
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);
346 if (retval) {
347 dev_err(&pdev->dev, "pci_enable_device failed!\n");
348 goto err;
349 }
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");
361 if (retval) {
362 dev_err(&pdev->dev, "pci_request_regions failed!\n");
363 goto err_null;
364 }
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);
390 spin_lock_init(&pht->regs_lock);
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);
396 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
397 retval = request_irq(pdev->irq, phantom_isr,
398 IRQF_SHARED, "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
410 if (IS_ERR(device_create(phantom_class, &pdev->dev,
411 MKDEV(phantom_major, minor), NULL,
412 "phantom%u", minor)))
413 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
438static void phantom_remove(struct pci_dev *pdev)
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);
448 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
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
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);
470 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
471
472 synchronize_irq(pdev->irq);
473
474 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
490static struct pci_device_id phantom_pci_tbl[] = {
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 },
494 { 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,
502 .remove = phantom_remove,
503 .suspend = phantom_suspend,
504 .resume = phantom_resume
505};
506
507static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION);
508
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 }
520 retval = class_create_file(phantom_class, &class_attr_version.attr);
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;
543err_unchr:
544 unregister_chrdev_region(dev, PHANTOM_MAX_MINORS);
545err_attr:
546 class_remove_file(phantom_class, &class_attr_version.attr);
547err_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
559 class_remove_file(phantom_class, &class_attr_version.attr);
560 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>");
569MODULE_DESCRIPTION("Sensable Phantom driver (PCI devices)");
570MODULE_LICENSE("GPL");
571MODULE_VERSION(PHANTOM_VERSION);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2005-2007 Jiri Slaby <jirislaby@gmail.com>
4 *
5 * You need a userspace library to cooperate with this driver. It (and other
6 * info) may be obtained here:
7 * http://www.fi.muni.cz/~xslaby/phantom.html
8 * or alternatively, you might use OpenHaptics provided by Sensable.
9 */
10
11#include <linux/compat.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/device.h>
15#include <linux/pci.h>
16#include <linux/fs.h>
17#include <linux/poll.h>
18#include <linux/interrupt.h>
19#include <linux/cdev.h>
20#include <linux/slab.h>
21#include <linux/phantom.h>
22#include <linux/sched.h>
23#include <linux/mutex.h>
24
25#include <linux/atomic.h>
26#include <asm/io.h>
27
28#define PHANTOM_VERSION "n0.9.8"
29
30#define PHANTOM_MAX_MINORS 8
31
32#define PHN_IRQCTL 0x4c /* irq control in caddr space */
33
34#define PHB_RUNNING 1
35#define PHB_NOT_OH 2
36
37static DEFINE_MUTEX(phantom_mutex);
38static struct class *phantom_class;
39static int phantom_major;
40
41struct phantom_device {
42 unsigned int opened;
43 void __iomem *caddr;
44 u32 __iomem *iaddr;
45 u32 __iomem *oaddr;
46 unsigned long status;
47 atomic_t counter;
48
49 wait_queue_head_t wait;
50 struct cdev cdev;
51
52 struct mutex open_lock;
53 spinlock_t regs_lock;
54
55 /* used in NOT_OH mode */
56 struct phm_regs oregs;
57 u32 ctl_reg;
58};
59
60static unsigned char phantom_devices[PHANTOM_MAX_MINORS];
61
62static int phantom_status(struct phantom_device *dev, unsigned long newstat)
63{
64 pr_debug("phantom_status %lx %lx\n", dev->status, newstat);
65
66 if (!(dev->status & PHB_RUNNING) && (newstat & PHB_RUNNING)) {
67 atomic_set(&dev->counter, 0);
68 iowrite32(PHN_CTL_IRQ, dev->iaddr + PHN_CONTROL);
69 iowrite32(0x43, dev->caddr + PHN_IRQCTL);
70 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
71 } else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) {
72 iowrite32(0, dev->caddr + PHN_IRQCTL);
73 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
74 }
75
76 dev->status = newstat;
77
78 return 0;
79}
80
81/*
82 * File ops
83 */
84
85static long phantom_ioctl(struct file *file, unsigned int cmd,
86 unsigned long arg)
87{
88 struct phantom_device *dev = file->private_data;
89 struct phm_regs rs;
90 struct phm_reg r;
91 void __user *argp = (void __user *)arg;
92 unsigned long flags;
93 unsigned int i;
94
95 switch (cmd) {
96 case PHN_SETREG:
97 case PHN_SET_REG:
98 if (copy_from_user(&r, argp, sizeof(r)))
99 return -EFAULT;
100
101 if (r.reg > 7)
102 return -EINVAL;
103
104 spin_lock_irqsave(&dev->regs_lock, flags);
105 if (r.reg == PHN_CONTROL && (r.value & PHN_CTL_IRQ) &&
106 phantom_status(dev, dev->status | PHB_RUNNING)){
107 spin_unlock_irqrestore(&dev->regs_lock, flags);
108 return -ENODEV;
109 }
110
111 pr_debug("phantom: writing %x to %u\n", r.value, r.reg);
112
113 /* preserve amp bit (don't allow to change it when in NOT_OH) */
114 if (r.reg == PHN_CONTROL && (dev->status & PHB_NOT_OH)) {
115 r.value &= ~PHN_CTL_AMP;
116 r.value |= dev->ctl_reg & PHN_CTL_AMP;
117 dev->ctl_reg = r.value;
118 }
119
120 iowrite32(r.value, dev->iaddr + r.reg);
121 ioread32(dev->iaddr); /* PCI posting */
122
123 if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ))
124 phantom_status(dev, dev->status & ~PHB_RUNNING);
125 spin_unlock_irqrestore(&dev->regs_lock, flags);
126 break;
127 case PHN_SETREGS:
128 case PHN_SET_REGS:
129 if (copy_from_user(&rs, argp, sizeof(rs)))
130 return -EFAULT;
131
132 pr_debug("phantom: SRS %u regs %x\n", rs.count, rs.mask);
133 spin_lock_irqsave(&dev->regs_lock, flags);
134 if (dev->status & PHB_NOT_OH)
135 memcpy(&dev->oregs, &rs, sizeof(rs));
136 else {
137 u32 m = min(rs.count, 8U);
138 for (i = 0; i < m; i++)
139 if (rs.mask & BIT(i))
140 iowrite32(rs.values[i], dev->oaddr + i);
141 ioread32(dev->iaddr); /* PCI posting */
142 }
143 spin_unlock_irqrestore(&dev->regs_lock, flags);
144 break;
145 case PHN_GETREG:
146 case PHN_GET_REG:
147 if (copy_from_user(&r, argp, sizeof(r)))
148 return -EFAULT;
149
150 if (r.reg > 7)
151 return -EINVAL;
152
153 r.value = ioread32(dev->iaddr + r.reg);
154
155 if (copy_to_user(argp, &r, sizeof(r)))
156 return -EFAULT;
157 break;
158 case PHN_GETREGS:
159 case PHN_GET_REGS: {
160 u32 m;
161
162 if (copy_from_user(&rs, argp, sizeof(rs)))
163 return -EFAULT;
164
165 m = min(rs.count, 8U);
166
167 pr_debug("phantom: GRS %u regs %x\n", rs.count, rs.mask);
168 spin_lock_irqsave(&dev->regs_lock, flags);
169 for (i = 0; i < m; i++)
170 if (rs.mask & BIT(i))
171 rs.values[i] = ioread32(dev->iaddr + i);
172 atomic_set(&dev->counter, 0);
173 spin_unlock_irqrestore(&dev->regs_lock, flags);
174
175 if (copy_to_user(argp, &rs, sizeof(rs)))
176 return -EFAULT;
177 break;
178 } case PHN_NOT_OH:
179 spin_lock_irqsave(&dev->regs_lock, flags);
180 if (dev->status & PHB_RUNNING) {
181 printk(KERN_ERR "phantom: you need to set NOT_OH "
182 "before you start the device!\n");
183 spin_unlock_irqrestore(&dev->regs_lock, flags);
184 return -EINVAL;
185 }
186 dev->status |= PHB_NOT_OH;
187 spin_unlock_irqrestore(&dev->regs_lock, flags);
188 break;
189 default:
190 return -ENOTTY;
191 }
192
193 return 0;
194}
195
196#ifdef CONFIG_COMPAT
197static long phantom_compat_ioctl(struct file *filp, unsigned int cmd,
198 unsigned long arg)
199{
200 if (_IOC_NR(cmd) <= 3 && _IOC_SIZE(cmd) == sizeof(compat_uptr_t)) {
201 cmd &= ~(_IOC_SIZEMASK << _IOC_SIZESHIFT);
202 cmd |= sizeof(void *) << _IOC_SIZESHIFT;
203 }
204 return phantom_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
205}
206#else
207#define phantom_compat_ioctl NULL
208#endif
209
210static int phantom_open(struct inode *inode, struct file *file)
211{
212 struct phantom_device *dev = container_of(inode->i_cdev,
213 struct phantom_device, cdev);
214
215 mutex_lock(&phantom_mutex);
216 nonseekable_open(inode, file);
217
218 if (mutex_lock_interruptible(&dev->open_lock)) {
219 mutex_unlock(&phantom_mutex);
220 return -ERESTARTSYS;
221 }
222
223 if (dev->opened) {
224 mutex_unlock(&dev->open_lock);
225 mutex_unlock(&phantom_mutex);
226 return -EINVAL;
227 }
228
229 WARN_ON(dev->status & PHB_NOT_OH);
230
231 file->private_data = dev;
232
233 atomic_set(&dev->counter, 0);
234 dev->opened++;
235 mutex_unlock(&dev->open_lock);
236 mutex_unlock(&phantom_mutex);
237 return 0;
238}
239
240static int phantom_release(struct inode *inode, struct file *file)
241{
242 struct phantom_device *dev = file->private_data;
243
244 mutex_lock(&dev->open_lock);
245
246 dev->opened = 0;
247 phantom_status(dev, dev->status & ~PHB_RUNNING);
248 dev->status &= ~PHB_NOT_OH;
249
250 mutex_unlock(&dev->open_lock);
251
252 return 0;
253}
254
255static __poll_t phantom_poll(struct file *file, poll_table *wait)
256{
257 struct phantom_device *dev = file->private_data;
258 __poll_t mask = 0;
259
260 pr_debug("phantom_poll: %d\n", atomic_read(&dev->counter));
261 poll_wait(file, &dev->wait, wait);
262
263 if (!(dev->status & PHB_RUNNING))
264 mask = EPOLLERR;
265 else if (atomic_read(&dev->counter))
266 mask = EPOLLIN | EPOLLRDNORM;
267
268 pr_debug("phantom_poll end: %x/%d\n", mask, atomic_read(&dev->counter));
269
270 return mask;
271}
272
273static const struct file_operations phantom_file_ops = {
274 .open = phantom_open,
275 .release = phantom_release,
276 .unlocked_ioctl = phantom_ioctl,
277 .compat_ioctl = phantom_compat_ioctl,
278 .poll = phantom_poll,
279 .llseek = no_llseek,
280};
281
282static irqreturn_t phantom_isr(int irq, void *data)
283{
284 struct phantom_device *dev = data;
285 unsigned int i;
286 u32 ctl;
287
288 spin_lock(&dev->regs_lock);
289 ctl = ioread32(dev->iaddr + PHN_CONTROL);
290 if (!(ctl & PHN_CTL_IRQ)) {
291 spin_unlock(&dev->regs_lock);
292 return IRQ_NONE;
293 }
294
295 iowrite32(0, dev->iaddr);
296 iowrite32(0xc0, dev->iaddr);
297
298 if (dev->status & PHB_NOT_OH) {
299 struct phm_regs *r = &dev->oregs;
300 u32 m = min(r->count, 8U);
301
302 for (i = 0; i < m; i++)
303 if (r->mask & BIT(i))
304 iowrite32(r->values[i], dev->oaddr + i);
305
306 dev->ctl_reg ^= PHN_CTL_AMP;
307 iowrite32(dev->ctl_reg, dev->iaddr + PHN_CONTROL);
308 }
309 spin_unlock(&dev->regs_lock);
310
311 ioread32(dev->iaddr); /* PCI posting */
312
313 atomic_inc(&dev->counter);
314 wake_up_interruptible(&dev->wait);
315
316 return IRQ_HANDLED;
317}
318
319/*
320 * Init and deinit driver
321 */
322
323static unsigned int phantom_get_free(void)
324{
325 unsigned int i;
326
327 for (i = 0; i < PHANTOM_MAX_MINORS; i++)
328 if (phantom_devices[i] == 0)
329 break;
330
331 return i;
332}
333
334static int phantom_probe(struct pci_dev *pdev,
335 const struct pci_device_id *pci_id)
336{
337 struct phantom_device *pht;
338 unsigned int minor;
339 int retval;
340
341 retval = pci_enable_device(pdev);
342 if (retval) {
343 dev_err(&pdev->dev, "pci_enable_device failed!\n");
344 goto err;
345 }
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 dev_err(&pdev->dev, "pci_request_regions failed!\n");
359 goto err_null;
360 }
361
362 retval = -ENOMEM;
363 pht = kzalloc(sizeof(*pht), GFP_KERNEL);
364 if (pht == NULL) {
365 dev_err(&pdev->dev, "unable to allocate device\n");
366 goto err_reg;
367 }
368
369 pht->caddr = pci_iomap(pdev, 0, 0);
370 if (pht->caddr == NULL) {
371 dev_err(&pdev->dev, "can't remap conf space\n");
372 goto err_fr;
373 }
374 pht->iaddr = pci_iomap(pdev, 2, 0);
375 if (pht->iaddr == NULL) {
376 dev_err(&pdev->dev, "can't remap input space\n");
377 goto err_unmc;
378 }
379 pht->oaddr = pci_iomap(pdev, 3, 0);
380 if (pht->oaddr == NULL) {
381 dev_err(&pdev->dev, "can't remap output space\n");
382 goto err_unmi;
383 }
384
385 mutex_init(&pht->open_lock);
386 spin_lock_init(&pht->regs_lock);
387 init_waitqueue_head(&pht->wait);
388 cdev_init(&pht->cdev, &phantom_file_ops);
389 pht->cdev.owner = THIS_MODULE;
390
391 iowrite32(0, pht->caddr + PHN_IRQCTL);
392 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
393 retval = request_irq(pdev->irq, phantom_isr,
394 IRQF_SHARED, "phantom", pht);
395 if (retval) {
396 dev_err(&pdev->dev, "can't establish ISR\n");
397 goto err_unmo;
398 }
399
400 retval = cdev_add(&pht->cdev, MKDEV(phantom_major, minor), 1);
401 if (retval) {
402 dev_err(&pdev->dev, "chardev registration failed\n");
403 goto err_irq;
404 }
405
406 if (IS_ERR(device_create(phantom_class, &pdev->dev,
407 MKDEV(phantom_major, minor), NULL,
408 "phantom%u", minor)))
409 dev_err(&pdev->dev, "can't create device\n");
410
411 pci_set_drvdata(pdev, pht);
412
413 return 0;
414err_irq:
415 free_irq(pdev->irq, pht);
416err_unmo:
417 pci_iounmap(pdev, pht->oaddr);
418err_unmi:
419 pci_iounmap(pdev, pht->iaddr);
420err_unmc:
421 pci_iounmap(pdev, pht->caddr);
422err_fr:
423 kfree(pht);
424err_reg:
425 pci_release_regions(pdev);
426err_null:
427 phantom_devices[minor] = 0;
428err_dis:
429 pci_disable_device(pdev);
430err:
431 return retval;
432}
433
434static void phantom_remove(struct pci_dev *pdev)
435{
436 struct phantom_device *pht = pci_get_drvdata(pdev);
437 unsigned int minor = MINOR(pht->cdev.dev);
438
439 device_destroy(phantom_class, MKDEV(phantom_major, minor));
440
441 cdev_del(&pht->cdev);
442
443 iowrite32(0, pht->caddr + PHN_IRQCTL);
444 ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
445 free_irq(pdev->irq, pht);
446
447 pci_iounmap(pdev, pht->oaddr);
448 pci_iounmap(pdev, pht->iaddr);
449 pci_iounmap(pdev, pht->caddr);
450
451 kfree(pht);
452
453 pci_release_regions(pdev);
454
455 phantom_devices[minor] = 0;
456
457 pci_disable_device(pdev);
458}
459
460static int __maybe_unused phantom_suspend(struct device *dev_d)
461{
462 struct phantom_device *dev = dev_get_drvdata(dev_d);
463
464 iowrite32(0, dev->caddr + PHN_IRQCTL);
465 ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
466
467 synchronize_irq(to_pci_dev(dev_d)->irq);
468
469 return 0;
470}
471
472static int __maybe_unused phantom_resume(struct device *dev_d)
473{
474 struct phantom_device *dev = dev_get_drvdata(dev_d);
475
476 iowrite32(0, dev->caddr + PHN_IRQCTL);
477
478 return 0;
479}
480
481static struct pci_device_id phantom_pci_tbl[] = {
482 { .vendor = PCI_VENDOR_ID_PLX, .device = PCI_DEVICE_ID_PLX_9050,
483 .subvendor = PCI_VENDOR_ID_PLX, .subdevice = PCI_DEVICE_ID_PLX_9050,
484 .class = PCI_CLASS_BRIDGE_OTHER << 8, .class_mask = 0xffff00 },
485 { 0, }
486};
487MODULE_DEVICE_TABLE(pci, phantom_pci_tbl);
488
489static SIMPLE_DEV_PM_OPS(phantom_pm_ops, phantom_suspend, phantom_resume);
490
491static struct pci_driver phantom_pci_driver = {
492 .name = "phantom",
493 .id_table = phantom_pci_tbl,
494 .probe = phantom_probe,
495 .remove = phantom_remove,
496 .driver.pm = &phantom_pm_ops,
497};
498
499static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION);
500
501static int __init phantom_init(void)
502{
503 int retval;
504 dev_t dev;
505
506 phantom_class = class_create(THIS_MODULE, "phantom");
507 if (IS_ERR(phantom_class)) {
508 retval = PTR_ERR(phantom_class);
509 printk(KERN_ERR "phantom: can't register phantom class\n");
510 goto err;
511 }
512 retval = class_create_file(phantom_class, &class_attr_version.attr);
513 if (retval) {
514 printk(KERN_ERR "phantom: can't create sysfs version file\n");
515 goto err_class;
516 }
517
518 retval = alloc_chrdev_region(&dev, 0, PHANTOM_MAX_MINORS, "phantom");
519 if (retval) {
520 printk(KERN_ERR "phantom: can't register character device\n");
521 goto err_attr;
522 }
523 phantom_major = MAJOR(dev);
524
525 retval = pci_register_driver(&phantom_pci_driver);
526 if (retval) {
527 printk(KERN_ERR "phantom: can't register pci driver\n");
528 goto err_unchr;
529 }
530
531 printk(KERN_INFO "Phantom Linux Driver, version " PHANTOM_VERSION ", "
532 "init OK\n");
533
534 return 0;
535err_unchr:
536 unregister_chrdev_region(dev, PHANTOM_MAX_MINORS);
537err_attr:
538 class_remove_file(phantom_class, &class_attr_version.attr);
539err_class:
540 class_destroy(phantom_class);
541err:
542 return retval;
543}
544
545static void __exit phantom_exit(void)
546{
547 pci_unregister_driver(&phantom_pci_driver);
548
549 unregister_chrdev_region(MKDEV(phantom_major, 0), PHANTOM_MAX_MINORS);
550
551 class_remove_file(phantom_class, &class_attr_version.attr);
552 class_destroy(phantom_class);
553
554 pr_debug("phantom: module successfully removed\n");
555}
556
557module_init(phantom_init);
558module_exit(phantom_exit);
559
560MODULE_AUTHOR("Jiri Slaby <jirislaby@gmail.com>");
561MODULE_DESCRIPTION("Sensable Phantom driver (PCI devices)");
562MODULE_LICENSE("GPL");
563MODULE_VERSION(PHANTOM_VERSION);