3 Copyright 1996,2002,2005 Gregory D. Hager, Alfred A. Rizzi, Noah J. Cowan,
4 Jason Lapenta, Scott Smedley, Greg Sharp
6 This file is part of the DT3155 Device Driver.
8 The DT3155 Device Driver is free software; you can redistribute it
9 and/or modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2 of the
11 License, or (at your option) any later version.
13 The DT3155 Device Driver is distributed in the hope that it will be
14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with the DT3155 Device Driver; if not, write to the Free
20 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 Date Programmer Description of changes made
26 -------------------------------------------------------------------
28 10-Oct-2001 SS port to 2.4 kernel
29 02-Apr-2002 SS Mods to use allocator as a standalone module;
30 Merged John Roll's changes (john@cfa.harvard.edu)
31 to make work with multiple boards.
32 02-Jul-2002 SS Merged James Rose's chages (rosejr@purdue.edu) to:
33 * fix successive interrupt-driven captures
34 * add select/poll support.
35 10-Jul-2002 GCS Add error check when ndevices > MAXBOARDS.
36 02-Aug-2002 GCS Fix field mode so that odd (lower) field is stored
37 in lower half of buffer.
38 05-Aug-2005 SS port to 2.6 kernel.
39 26-Oct-2009 SS port to 2.6.30 kernel.
43 ** appended "mem=124" in lilo.conf to allow for 4megs free on my 128meg system.
44 * using allocator.c and allocator.h from o'reilly book (alessandro rubini)
45 ftp://ftp.systemy.it/pub/develop (see README.allocator)
47 + might want to get rid of MAXboards for allocating initial buffer.
48 confusing and not necessary
50 + in cleanup_module the MOD_IN_USE looks like it is check after it should
52 * GFP_DMA should not be set with a PCI system (pg 291)
54 - NJC why are only two buffers allowed? (see isr, approx line 358)
58 extern void printques(int);
60 #include <linux/module.h>
61 #include <linux/interrupt.h>
62 #include <linux/pci.h>
63 #include <linux/types.h>
64 #include <linux/poll.h>
65 #include <linux/sched.h>
66 #include <linux/smp_lock.h>
69 #include <asm/uaccess.h>
72 #include "dt3155_drv.h"
73 #include "dt3155_isr.h"
74 #include "dt3155_io.h"
75 #include "allocator.h"
78 MODULE_LICENSE("GPL");
80 /* Error variable. Zero means no error. */
83 #ifndef PCI_DEVICE_ID_INTEL_7116
84 #define PCI_DEVICE_ID_INTEL_7116 0x1223
87 #define DT3155_VENDORID PCI_VENDOR_ID_INTEL
88 #define DT3155_DEVICEID PCI_DEVICE_ID_INTEL_7116
92 #define DT_3155_DEBUG_MSG(x,y) printk(x,y)
94 #define DT_3155_DEBUG_MSG(x,y)
97 /* wait queue for interrupts */
98 wait_queue_head_t dt3155_read_wait_queue
[MAXBOARDS
];
100 /* set to dynamicaly allocate, but it is tunable: */
101 /* insmod DT_3155 dt3155 dt3155_major=XX */
102 int dt3155_major
= 0;
104 /* The minor numbers are 0 and 1 ... they are not tunable.
105 * They are used as the indices for the structure vectors,
106 * and register address vectors
109 /* Global structures and variables */
111 /* Status of each device */
112 struct dt3155_status dt3155_status
[MAXBOARDS
];
114 /* kernel logical address of the board */
115 static void __iomem
*dt3155_lbase
[MAXBOARDS
] = { NULL
121 u32 dt3155_dev_open
[MAXBOARDS
] = {0
132 * Stops interrupt generation right away and resets the status
133 * to idle. I don't know why this works and the other way doesn't.
136 static void quick_stop (int minor
)
138 struct dt3155_fbuffer
*fb
= &dt3155_status
[minor
].fbuffer
;
140 // TODO: scott was here
142 int_csr_r
.reg
= readl(dt3155_lbase
[minor
] + INT_CSR
);
143 /* disable interrupts */
144 int_csr_r
.fld
.FLD_END_EVE_EN
= 0;
145 int_csr_r
.fld
.FLD_END_ODD_EN
= 0;
146 writel(int_csr_r
.reg
, dt3155_lbase
[minor
] + INT_CSR
);
148 dt3155_status
[minor
].state
&= ~(DT3155_STATE_STOP
|0xff);
149 /* mark the system stopped: */
150 dt3155_status
[minor
].state
|= DT3155_STATE_IDLE
;
151 fb
->stop_acquire
= 0;
152 fb
->even_stopped
= 0;
154 dt3155_status
[minor
].state
|= DT3155_STATE_STOP
;
155 fb
->stop_acquire
= 1;
161 /*****************************************************
162 * dt3155_isr() Interrupt service routien
164 * - looks like this isr supports IRQ sharing (or could) JML
165 * - Assumes irq's are disabled, via SA_INTERRUPT flag
166 * being set in request_irq() call from init_module()
167 *****************************************************/
168 static void dt3155_isr(int irq
, void *dev_id
, struct pt_regs
*regs
)
175 struct dt3155_fbuffer
*fb
;
177 /* find out who issued the interrupt */
178 for (index
= 0; index
< ndevices
; index
++) {
179 if(dev_id
== (void*) &dt3155_status
[index
])
186 /* hopefully we should not get here */
187 if (minor
< 0 || minor
>= MAXBOARDS
) {
188 printk(KERN_ERR
"dt3155_isr called with invalid dev_id\n");
192 mmio
= dt3155_lbase
[minor
];
193 fb
= &dt3155_status
[minor
].fbuffer
;
195 /* Check for corruption and set a flag if so */
196 csr1_r
.reg
= readl(mmio
+ CSR1
);
198 if ((csr1_r
.fld
.FLD_CRPT_EVE
) || (csr1_r
.fld
.FLD_CRPT_ODD
))
200 /* TODO: this should probably stop acquisition */
201 /* and set some flags so that dt3155_read */
202 /* returns an error next time it is called */
203 dt3155_errno
= DT_ERR_CORRUPT
;
204 printk("dt3155: corrupt field\n");
208 int_csr_r
.reg
= readl(mmio
+ INT_CSR
);
210 /* Handle the even field ... */
211 if (int_csr_r
.fld
.FLD_END_EVE
)
213 if ((dt3155_status
[minor
].state
& DT3155_STATE_MODE
) ==
219 ReadI2C(mmio
, EVEN_CSR
, &i2c_even_csr
.reg
);
221 /* Clear the interrupt? */
222 int_csr_r
.fld
.FLD_END_EVE
= 1;
224 /* disable the interrupt if last field */
225 if (fb
->stop_acquire
)
227 printk("dt3155: even stopped.\n");
228 fb
->even_stopped
= 1;
229 if (i2c_even_csr
.fld
.SNGL_EVE
)
231 int_csr_r
.fld
.FLD_END_EVE_EN
= 0;
235 i2c_even_csr
.fld
.SNGL_EVE
= 1;
239 writel(int_csr_r
.reg
, mmio
+ INT_CSR
);
241 /* Set up next DMA if we are doing FIELDS */
242 if ((dt3155_status
[minor
].state
& DT3155_STATE_MODE
) ==
245 /* GCS (Aug 2, 2002) -- In field mode, dma the odd field
246 into the lower half of the buffer */
247 const u32 stride
= dt3155_status
[minor
].config
.cols
;
248 buffer_addr
= fb
->frame_info
[fb
->active_buf
].addr
+
249 (DT3155_MAX_ROWS
/ 2) * stride
;
250 local_save_flags(flags
);
252 wake_up_interruptible(&dt3155_read_wait_queue
[minor
]);
254 /* Set up the DMA address for the next field */
255 local_irq_restore(flags
);
256 writel(buffer_addr
, mmio
+ ODD_DMA_START
);
259 /* Check for errors. */
260 i2c_even_csr
.fld
.DONE_EVE
= 1;
261 if (i2c_even_csr
.fld
.ERROR_EVE
)
262 dt3155_errno
= DT_ERR_OVERRUN
;
264 WriteI2C(mmio
, EVEN_CSR
, i2c_even_csr
.reg
);
266 /* Note that we actually saw an even field meaning */
267 /* that subsequent odd field complete the frame */
268 fb
->even_happened
= 1;
270 /* recording the time that the even field finished, this should be */
271 /* about time in the middle of the frame */
272 do_gettimeofday(&fb
->frame_info
[fb
->active_buf
].time
);
276 /* ... now handle the odd field */
277 if (int_csr_r
.fld
.FLD_END_ODD
)
279 ReadI2C(mmio
, ODD_CSR
, &i2c_odd_csr
.reg
);
281 /* Clear the interrupt? */
282 int_csr_r
.fld
.FLD_END_ODD
= 1;
284 if (fb
->even_happened
||
285 (dt3155_status
[minor
].state
& DT3155_STATE_MODE
) ==
291 if (fb
->stop_acquire
&& fb
->even_stopped
)
293 printk(KERN_DEBUG
"dt3155: stopping odd..\n");
294 if (i2c_odd_csr
.fld
.SNGL_ODD
)
296 /* disable interrupts */
297 int_csr_r
.fld
.FLD_END_ODD_EN
= 0;
298 dt3155_status
[minor
].state
&= ~(DT3155_STATE_STOP
|0xff);
300 /* mark the system stopped: */
301 dt3155_status
[minor
].state
|= DT3155_STATE_IDLE
;
302 fb
->stop_acquire
= 0;
303 fb
->even_stopped
= 0;
305 printk(KERN_DEBUG
"dt3155: state is now %x\n",
306 dt3155_status
[minor
].state
);
310 i2c_odd_csr
.fld
.SNGL_ODD
= 1;
314 writel(int_csr_r
.reg
, mmio
+ INT_CSR
);
316 /* if the odd field has been acquired, then */
317 /* change the next dma location for both fields */
318 /* and wake up the process if sleeping */
319 if (fb
->even_happened
||
320 (dt3155_status
[minor
].state
& DT3155_STATE_MODE
) ==
324 local_save_flags(flags
);
330 if (fb
->nbuffers
> 2)
332 if (!are_empty_buffers(minor
))
334 /* The number of active + locked buffers is
335 * at most 2, and since there are none empty, there
336 * must be at least nbuffers-2 ready buffers.
337 * This is where we 'drop frames', oldest first. */
338 push_empty(pop_ready(minor
), minor
);
341 /* The ready_que can't be full, since we know
342 * there is one active buffer right now, so it's safe
343 * to push the active buf on the ready_que. */
344 push_ready(minor
, fb
->active_buf
);
345 /* There's at least 1 empty -- make it active */
346 fb
->active_buf
= pop_empty(minor
);
347 fb
->frame_info
[fb
->active_buf
].tag
= ++unique_tag
;
349 else /* nbuffers == 2, special case */
350 { /* There is 1 active buffer.
351 * If there is a locked buffer, keep the active buffer
352 * the same -- that means we drop a frame.
354 if (fb
->locked_buf
< 0)
356 push_ready(minor
, fb
->active_buf
);
357 if (are_empty_buffers(minor
))
359 fb
->active_buf
= pop_empty(minor
);
362 { /* no empty or locked buffers, so use a readybuf */
363 fb
->active_buf
= pop_ready(minor
);
372 fb
->even_happened
= 0;
374 wake_up_interruptible(&dt3155_read_wait_queue
[minor
]);
376 local_irq_restore(flags
);
380 /* Set up the DMA address for the next frame/field */
381 buffer_addr
= fb
->frame_info
[fb
->active_buf
].addr
;
382 if ((dt3155_status
[minor
].state
& DT3155_STATE_MODE
) ==
385 writel(buffer_addr
, mmio
+ EVEN_DMA_START
);
389 writel(buffer_addr
, mmio
+ EVEN_DMA_START
);
391 writel(buffer_addr
+ dt3155_status
[minor
].config
.cols
,
392 mmio
+ ODD_DMA_START
);
395 /* Do error checking */
396 i2c_odd_csr
.fld
.DONE_ODD
= 1;
397 if (i2c_odd_csr
.fld
.ERROR_ODD
)
398 dt3155_errno
= DT_ERR_OVERRUN
;
400 WriteI2C(mmio
, ODD_CSR
, i2c_odd_csr
.reg
);
404 /* If we get here, the Odd Field wasn't it either... */
405 printk("neither even nor odd. shared perhaps?\n");
408 /*****************************************************
409 * init_isr(int minor)
410 * turns on interupt generation for the card
411 * designated by "minor".
412 * It is called *only* from inside ioctl().
413 *****************************************************/
414 static void dt3155_init_isr(int minor
)
416 const u32 stride
= dt3155_status
[minor
].config
.cols
;
417 void __iomem
*mmio
= dt3155_lbase
[minor
];
418 struct dt3155_fbuffer
*fb
= &dt3155_status
[minor
].fbuffer
;
420 switch (dt3155_status
[minor
].state
& DT3155_STATE_MODE
)
422 case DT3155_STATE_FLD
:
424 even_dma_start_r
= fb
->frame_info
[fb
->active_buf
].addr
;
425 even_dma_stride_r
= 0;
426 odd_dma_stride_r
= 0;
428 writel(even_dma_start_r
, mmio
+ EVEN_DMA_START
);
429 writel(even_dma_stride_r
, mmio
+ EVEN_DMA_STRIDE
);
430 writel(odd_dma_stride_r
, mmio
+ ODD_DMA_STRIDE
);
434 case DT3155_STATE_FRAME
:
437 even_dma_start_r
= fb
->frame_info
[fb
->active_buf
].addr
;
438 odd_dma_start_r
= even_dma_start_r
+ stride
;
439 even_dma_stride_r
= stride
;
440 odd_dma_stride_r
= stride
;
442 writel(even_dma_start_r
, mmio
+ EVEN_DMA_START
);
443 writel(odd_dma_start_r
, mmio
+ ODD_DMA_START
);
444 writel(even_dma_stride_r
, mmio
+ EVEN_DMA_STRIDE
);
445 writel(odd_dma_stride_r
, mmio
+ ODD_DMA_STRIDE
);
450 /* 50/60 Hz should be set before this point but let's make sure it is */
453 ReadI2C(mmio
, CSR2
, &i2c_csr2
.reg
);
454 i2c_csr2
.fld
.HZ50
= FORMAT50HZ
;
455 WriteI2C(mmio
, CSR2
, i2c_csr2
.reg
);
457 /* enable busmaster chip, clear flags */
461 * shouldn't we be concered with continuous values of
462 * DT3155_SNAP & DT3155_ACQ here? (SS)
466 csr1_r
.fld
.CAP_CONT_EVE
= 1; /* use continuous capture bits to */
467 csr1_r
.fld
.CAP_CONT_ODD
= 1; /* enable */
468 csr1_r
.fld
.FLD_DN_EVE
= 1; /* writing a 1 clears flags */
469 csr1_r
.fld
.FLD_DN_ODD
= 1;
470 csr1_r
.fld
.SRST
= 1; /* reset - must be 1 */
471 csr1_r
.fld
.FIFO_EN
= 1; /* fifo control - must be 1 */
472 csr1_r
.fld
.FLD_CRPT_EVE
= 1; /* writing a 1 clears flags */
473 csr1_r
.fld
.FLD_CRPT_ODD
= 1;
475 writel(csr1_r
.reg
, mmio
+ CSR1
);
477 /* Enable interrupts at the end of each field */
480 int_csr_r
.fld
.FLD_END_EVE_EN
= 1;
481 int_csr_r
.fld
.FLD_END_ODD_EN
= 1;
482 int_csr_r
.fld
.FLD_START_EN
= 0;
484 writel(int_csr_r
.reg
, mmio
+ INT_CSR
);
486 /* start internal BUSY bits */
488 ReadI2C(mmio
, CSR2
, &i2c_csr2
.reg
);
489 i2c_csr2
.fld
.BUSY_ODD
= 1;
490 i2c_csr2
.fld
.BUSY_EVE
= 1;
491 WriteI2C(mmio
, CSR2
, i2c_csr2
.reg
);
493 /* Now its up to the interrupt routine!! */
499 /*****************************************************
502 *****************************************************/
503 static int dt3155_ioctl(struct inode
*inode
,
508 int minor
= MINOR(inode
->i_rdev
); /* What device are we ioctl()'ing? */
509 void __user
*up
= (void __user
*)arg
;
510 struct dt3155_fbuffer
*fb
= &dt3155_status
[minor
].fbuffer
;
512 if (minor
>= MAXBOARDS
|| minor
< 0)
515 /* make sure it is valid command */
516 if (_IOC_NR(cmd
) > DT3155_IOC_MAXNR
)
518 printk("DT3155: invalid IOCTL(0x%x)\n",cmd
);
519 printk("DT3155: Valid commands (0x%x), (0x%x), (0x%x), (0x%x), (0x%x)\n",
520 (unsigned int)DT3155_GET_CONFIG
,
521 (unsigned int)DT3155_SET_CONFIG
,
522 (unsigned int)DT3155_START
,
523 (unsigned int)DT3155_STOP
,
524 (unsigned int)DT3155_FLUSH
);
530 case DT3155_SET_CONFIG
:
532 if (dt3155_status
[minor
].state
!= DT3155_STATE_IDLE
)
536 struct dt3155_config tmp
;
537 if (copy_from_user(&tmp
, up
, sizeof(tmp
)))
539 /* check for valid settings */
540 if (tmp
.rows
> DT3155_MAX_ROWS
||
541 tmp
.cols
> DT3155_MAX_COLS
||
542 (tmp
.acq_mode
!= DT3155_MODE_FRAME
&&
543 tmp
.acq_mode
!= DT3155_MODE_FIELD
) ||
544 (tmp
.continuous
!= DT3155_SNAP
&&
545 tmp
.continuous
!= DT3155_ACQ
))
549 dt3155_status
[minor
].config
= tmp
;
553 case DT3155_GET_CONFIG
:
555 if (copy_to_user(up
, &dt3155_status
[minor
],
556 sizeof(struct dt3155_status
)))
560 case DT3155_FLUSH
: /* Flushes the buffers -- ensures fresh data */
562 if (dt3155_status
[minor
].state
!= DT3155_STATE_IDLE
)
564 return dt3155_flush(minor
);
568 if (dt3155_status
[minor
].state
& DT3155_STATE_STOP
||
572 if (dt3155_status
[minor
].state
== DT3155_STATE_IDLE
)
576 if (copy_to_user(up
, &dt3155_status
[minor
],
577 sizeof(struct dt3155_status
)))
583 if (dt3155_status
[minor
].state
!= DT3155_STATE_IDLE
)
586 fb
->stop_acquire
= 0;
589 /* Set the MODE in the status -- we default to FRAME */
590 if (dt3155_status
[minor
].config
.acq_mode
== DT3155_MODE_FIELD
)
592 dt3155_status
[minor
].state
= DT3155_STATE_FLD
;
596 dt3155_status
[minor
].state
= DT3155_STATE_FRAME
;
599 dt3155_init_isr(minor
);
600 if (copy_to_user(up
, &dt3155_status
[minor
],
601 sizeof(struct dt3155_status
)))
607 printk("DT3155: invalid IOCTL(0x%x)\n",cmd
);
608 printk("DT3155: Valid commands (0x%x), (0x%x), (0x%x), (0x%x), (0x%x)\n",
609 (unsigned int)DT3155_GET_CONFIG
,
610 (unsigned int)DT3155_SET_CONFIG
,
611 DT3155_START
, DT3155_STOP
, DT3155_FLUSH
);
618 /*****************************************************
621 * only allow the user to mmap the registers and buffer
622 * It is quite possible that this is broken, since the
623 * addition of of the capacity for two cards!!!!!!!!
624 * It *looks* like it should work but since I'm not
625 * sure how to use it, I'm not actually sure. (NJC? ditto by SS)
626 *****************************************************/
627 static int dt3155_mmap (struct file
* file
, struct vm_area_struct
* vma
)
629 /* which device are we mmapping? */
630 int minor
= MINOR(file
->f_dentry
->d_inode
->i_rdev
);
631 unsigned long offset
;
632 offset
= vma
->vm_pgoff
<< PAGE_SHIFT
;
634 if (offset
>= __pa(high_memory
) || (file
->f_flags
& O_SYNC
))
635 vma
->vm_flags
|= VM_IO
;
637 /* Don't try to swap out physical pages.. */
638 vma
->vm_flags
|= VM_RESERVED
;
640 /* they are mapping the registers or the buffer */
641 if ((offset
== dt3155_status
[minor
].reg_addr
&&
642 vma
->vm_end
- vma
->vm_start
== PCI_PAGE_SIZE
) ||
643 (offset
== dt3155_status
[minor
].mem_addr
&&
644 vma
->vm_end
- vma
->vm_start
== dt3155_status
[minor
].mem_size
))
646 if (remap_pfn_range(vma
,
648 offset
>> PAGE_SHIFT
,
649 vma
->vm_end
- vma
->vm_start
,
650 vma
->vm_page_prot
)) {
651 printk("DT3155: remap_page_range() failed.\n");
657 printk("DT3155: dt3155_mmap() bad call.\n");
665 /*****************************************************
668 * Our special open code.
669 * MOD_INC_USE_COUNT make sure that the driver memory is not freed
670 * while the device is in use.
671 *****************************************************/
672 static int dt3155_open(struct inode
* inode
, struct file
* filep
)
674 int minor
= MINOR(inode
->i_rdev
); /* what device are we opening? */
675 if (dt3155_dev_open
[minor
]) {
676 printk ("DT3155: Already opened by another process.\n");
680 if (dt3155_status
[minor
].device_installed
==0)
682 printk("DT3155 Open Error: No such device dt3155 minor number %d\n",
687 if (dt3155_status
[minor
].state
!= DT3155_STATE_IDLE
) {
688 printk ("DT3155: Not in idle state (state = %x)\n",
689 dt3155_status
[minor
].state
);
693 printk("DT3155: Device opened.\n");
695 dt3155_dev_open
[minor
] = 1 ;
699 /* Disable ALL interrupts */
701 writel(int_csr_r
.reg
, dt3155_lbase
[minor
] + INT_CSR
);
703 init_waitqueue_head(&(dt3155_read_wait_queue
[minor
]));
709 /*****************************************************
712 * Now decrement the use count.
714 *****************************************************/
715 static int dt3155_close(struct inode
*inode
, struct file
*filep
)
719 minor
= MINOR(inode
->i_rdev
); /* which device are we closing */
720 if (!dt3155_dev_open
[minor
])
722 printk("DT3155: attempt to CLOSE a not OPEN device\n");
726 dt3155_dev_open
[minor
] = 0;
728 if (dt3155_status
[minor
].state
!= DT3155_STATE_IDLE
)
736 /*****************************************************
739 *****************************************************/
740 static ssize_t
dt3155_read(struct file
*filep
, char __user
*buf
,
741 size_t count
, loff_t
*ppos
)
743 /* which device are we reading from? */
744 int minor
= MINOR(filep
->f_dentry
->d_inode
->i_rdev
);
747 struct dt3155_fbuffer
*fb
= &dt3155_status
[minor
].fbuffer
;
748 struct frame_info
*frame_info
;
750 /* TODO: this should check the error flag and */
751 /* return an error on hardware failures */
752 if (count
!= sizeof(struct dt3155_read
))
754 printk("DT3155 ERROR (NJC): count is not right\n");
759 /* Hack here -- I'm going to allow reading even when idle.
760 * this is so that the frames can be read after STOP has
761 * been called. Leaving it here, commented out, as a reminder
762 * for a short while to make sure there are no problems.
763 * Note that if the driver is not opened in non_blocking mode,
764 * and the device is idle, then it could sit here forever! */
766 /* if (dt3155_status[minor].state == DT3155_STATE_IDLE)*/
769 /* non-blocking reads should return if no data */
770 if (filep
->f_flags
& O_NDELAY
)
772 if ((frame_index
= dt3155_get_ready_buffer(minor
)) < 0) {
773 /*printk("dt3155: no buffers available (?)\n");*/
774 /* printques(minor); */
781 * sleep till data arrives , or we get interrupted.
782 * Note that wait_event_interruptible() does not actually
783 * sleep/wait if it's condition evaluates to true upon entry.
785 wait_event_interruptible(dt3155_read_wait_queue
[minor
],
786 (frame_index
= dt3155_get_ready_buffer(minor
))
791 printk ("DT3155: read: interrupted\n");
798 frame_info
= &fb
->frame_info
[frame_index
];
800 /* make this an offset */
801 offset
= frame_info
->addr
- dt3155_status
[minor
].mem_addr
;
803 put_user(offset
, (unsigned int __user
*)buf
);
805 put_user(fb
->frame_count
, (unsigned int __user
*)buf
);
807 put_user(dt3155_status
[minor
].state
, (unsigned int __user
*)buf
);
809 if (copy_to_user(buf
, frame_info
, sizeof(*frame_info
)))
812 return sizeof(struct dt3155_read
);
815 static unsigned int dt3155_poll (struct file
* filp
, poll_table
*wait
)
817 int minor
= MINOR(filp
->f_dentry
->d_inode
->i_rdev
);
819 if (!is_ready_buf_empty(minor
))
820 return POLLIN
| POLLRDNORM
;
822 poll_wait (filp
, &dt3155_read_wait_queue
[minor
], wait
);
828 dt3155_unlocked_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
833 ret
= dt3155_ioctl(file
->f_path
.dentry
->d_inode
, file
, cmd
, arg
);
839 /*****************************************************
840 * file operations supported by DT3155 driver
841 * needed by init_module
843 *****************************************************/
844 static struct file_operations dt3155_fops
= {
846 .unlocked_ioctl
= dt3155_unlocked_ioctl
,
850 .release
= dt3155_close
854 /*****************************************************
857 * PCI has been totally reworked in 2.1..
858 *****************************************************/
859 static int find_PCI (void)
861 struct pci_dev
*pci_dev
= NULL
;
862 int error
, pci_index
= 0;
863 unsigned short rev_device
;
867 while ((pci_dev
= pci_get_device
868 (DT3155_VENDORID
, DT3155_DEVICEID
, pci_dev
)) != NULL
)
872 /* Is it really there? */
874 pci_read_config_word(pci_dev
, PCI_CLASS_DEVICE
, &rev_device
)))
878 DT_3155_DEBUG_MSG("DT3155: Device number %d \n", pci_index
);
880 /* Make sure the driver was compiled with enough buffers to handle
882 if (pci_index
> MAXBOARDS
) {
883 printk("DT3155: ERROR - found %d devices, but driver only configured "
885 "DT3155: Please change MAXBOARDS in dt3155.h\n",
886 pci_index
, MAXBOARDS
);
890 /* Now, just go out and make sure that this/these device(s) is/are
891 actually mapped into the kernel address space */
892 if ((error
= pci_read_config_dword(pci_dev
, PCI_BASE_ADDRESS_0
,
895 printk("DT3155: Was not able to find device \n");
899 DT_3155_DEBUG_MSG("DT3155: Base address 0 for device is %lx \n", base
);
900 dt3155_status
[pci_index
-1].reg_addr
= base
;
902 /* Remap the base address to a logical address through which we
904 dt3155_lbase
[pci_index
- 1] = ioremap(base
, PCI_PAGE_SIZE
);
905 dt3155_status
[pci_index
- 1].reg_addr
= base
;
906 DT_3155_DEBUG_MSG("DT3155: New logical address is %p \n",
907 dt3155_lbase
[pci_index
-1]);
908 if (!dt3155_lbase
[pci_index
-1])
910 printk("DT3155: Unable to remap control registers\n");
914 if ((error
= pci_read_config_byte(pci_dev
, PCI_INTERRUPT_LINE
, &irq
)))
916 printk("DT3155: Was not able to find device \n");
920 DT_3155_DEBUG_MSG("DT3155: IRQ is %d \n",irq
);
921 dt3155_status
[pci_index
-1].irq
= irq
;
922 /* Set flag: kth device found! */
923 dt3155_status
[pci_index
-1].device_installed
= 1;
924 printk("DT3155: Installing device %d w/irq %d and address %p\n",
926 dt3155_status
[pci_index
-1].irq
,
927 dt3155_lbase
[pci_index
-1]);
930 ndevices
= pci_index
;
935 pci_dev_put(pci_dev
);
939 u32 allocatorAddr
= 0;
941 /*****************************************************
943 *****************************************************/
944 int init_module(void)
948 char *devname
[MAXBOARDS
];
950 devname
[0] = "dt3155a";
952 devname
[1] = "dt3155b";
955 printk("DT3155: Loading module...\n");
957 /* Register the device driver */
958 rcode
= register_chrdev(dt3155_major
, "dt3155", &dt3155_fops
);
961 printk(KERN_INFO
"DT3155: register_chrdev failed \n");
965 if(dt3155_major
== 0)
966 dt3155_major
= rcode
; /* dynamic */
969 /* init the status variables. */
970 /* DMA memory is taken care of in setup_buffers() */
971 for (index
= 0; index
< MAXBOARDS
; index
++)
973 dt3155_status
[index
].config
.acq_mode
= DT3155_MODE_FRAME
;
974 dt3155_status
[index
].config
.continuous
= DT3155_ACQ
;
975 dt3155_status
[index
].config
.cols
= DT3155_MAX_COLS
;
976 dt3155_status
[index
].config
.rows
= DT3155_MAX_ROWS
;
977 dt3155_status
[index
].state
= DT3155_STATE_IDLE
;
979 /* find_PCI() will check if devices are installed; */
980 /* first assume they're not: */
981 dt3155_status
[index
].mem_addr
= 0;
982 dt3155_status
[index
].mem_size
= 0;
983 dt3155_status
[index
].state
= DT3155_STATE_IDLE
;
984 dt3155_status
[index
].device_installed
= 0;
987 /* Now let's find the hardware. find_PCI() will set ndevices to the
988 * number of cards found in this machine. */
990 if ((rcode
= find_PCI()) != 0)
992 printk("DT3155 error: find_PCI() failed to find dt3155 board(s)\n");
993 unregister_chrdev(dt3155_major
, "dt3155");
998 /* Ok, time to setup the frame buffers */
999 if((rcode
= dt3155_setup_buffers(&allocatorAddr
)) < 0)
1001 printk("DT3155: Error: setting up buffer not large enough.");
1002 unregister_chrdev(dt3155_major
, "dt3155");
1006 /* If we are this far, then there is enough RAM */
1007 /* for the buffers: Print the configuration. */
1008 for( index
= 0; index
< ndevices
; index
++)
1010 printk("DT3155: Device = %d; acq_mode = %d; "
1011 "continuous = %d; cols = %d; rows = %d;\n",
1013 dt3155_status
[index
].config
.acq_mode
,
1014 dt3155_status
[index
].config
.continuous
,
1015 dt3155_status
[index
].config
.cols
,
1016 dt3155_status
[index
].config
.rows
);
1017 printk("DT3155: m_addr = 0x%x; m_size = %ld; "
1018 "state = %d; device_installed = %d\n",
1019 dt3155_status
[index
].mem_addr
,
1020 (long int)dt3155_status
[index
].mem_size
,
1021 dt3155_status
[index
].state
,
1022 dt3155_status
[index
].device_installed
);
1025 /* Disable ALL interrupts */
1027 for( index
= 0; index
< ndevices
; index
++)
1029 writel(int_csr_r
.reg
, dt3155_lbase
[index
] + INT_CSR
);
1030 if(dt3155_status
[index
].device_installed
)
1033 * This driver *looks* like it can handle sharing interrupts,
1034 * but I can't actually test myself. I've had reports that it
1035 * DOES work so I'll enable it for now. This comment will remain
1036 * as a reminder in case any problems arise. (SS)
1038 /* in older kernels flags are: SA_SHIRQ | SA_INTERRUPT */
1039 rcode
= request_irq(dt3155_status
[index
].irq
, (void *)dt3155_isr
,
1040 IRQF_SHARED
| IRQF_DISABLED
, devname
[index
],
1041 (void*) &dt3155_status
[index
]);
1044 printk("DT3155: minor %d request_irq failed for IRQ %d\n",
1045 index
, dt3155_status
[index
].irq
);
1046 unregister_chrdev(dt3155_major
, "dt3155");
1052 printk("DT3155: finished loading\n");
1057 /*****************************************************
1058 * cleanup_module(void)
1060 *****************************************************/
1061 void cleanup_module(void)
1065 printk("DT3155: cleanup_module called\n");
1067 /* removed DMA allocated with the allocator */
1068 #ifdef STANDALONE_ALLOCATOR
1069 if (allocatorAddr
!= 0)
1070 allocator_free_dma(allocatorAddr
);
1072 allocator_cleanup();
1075 unregister_chrdev(dt3155_major
, "dt3155");
1077 for(index
= 0; index
< ndevices
; index
++)
1079 if(dt3155_status
[index
].device_installed
== 1)
1081 printk("DT3155: Freeing irq %d for device %d\n",
1082 dt3155_status
[index
].irq
, index
);
1083 free_irq(dt3155_status
[index
].irq
, (void*)&dt3155_status
[index
]);