2 * A driver for the CMOS camera controller in the Marvell 88ALP01 "cafe"
3 * multifunction chip. Currently works with the Omnivision OV7670
6 * The data sheet for this device can be found at:
7 * http://www.marvell.com/products/pcconn/88ALP01.jsp
9 * Copyright 2006 One Laptop Per Child Association, Inc.
10 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
12 * Written by Jonathan Corbet, corbet@lwn.net.
14 * This file may be distributed under the terms of the GNU General
15 * Public License, version 2.
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
22 #include <linux/pci.h>
23 #include <linux/i2c.h>
24 #include <linux/interrupt.h>
25 #include <linux/spinlock.h>
26 #include <linux/videodev2.h>
27 #include <media/v4l2-common.h>
28 #include <media/v4l2-ioctl.h>
29 #include <media/v4l2-chip-ident.h>
30 #include <linux/device.h>
31 #include <linux/wait.h>
32 #include <linux/list.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/delay.h>
35 #include <linux/debugfs.h>
36 #include <linux/jiffies.h>
37 #include <linux/vmalloc.h>
39 #include <asm/uaccess.h>
42 #include "cafe_ccic-regs.h"
44 #define CAFE_VERSION 0x000002
50 MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>");
51 MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver");
52 MODULE_LICENSE("GPL");
53 MODULE_SUPPORTED_DEVICE("Video");
56 * Internal DMA buffer management. Since the controller cannot do S/G I/O,
57 * we must have physically contiguous buffers to bring frames into.
58 * These parameters control how many buffers we use, whether we
59 * allocate them at load time (better chance of success, but nails down
60 * memory) or when somebody tries to use the camera (riskier), and,
61 * for load-time allocation, how big they should be.
63 * The controller can cycle through three buffers. We could use
64 * more by flipping pointers around, but it probably makes little
68 #define MAX_DMA_BUFS 3
69 static int alloc_bufs_at_read
;
70 module_param(alloc_bufs_at_read
, bool, 0444);
71 MODULE_PARM_DESC(alloc_bufs_at_read
,
72 "Non-zero value causes DMA buffers to be allocated when the "
73 "video capture device is read, rather than at module load "
74 "time. This saves memory, but decreases the chances of "
75 "successfully getting those buffers.");
77 static int n_dma_bufs
= 3;
78 module_param(n_dma_bufs
, uint
, 0644);
79 MODULE_PARM_DESC(n_dma_bufs
,
80 "The number of DMA buffers to allocate. Can be either two "
81 "(saves memory, makes timing tighter) or three.");
83 static int dma_buf_size
= VGA_WIDTH
* VGA_HEIGHT
* 2; /* Worst case */
84 module_param(dma_buf_size
, uint
, 0444);
85 MODULE_PARM_DESC(dma_buf_size
,
86 "The size of the allocated DMA buffers. If actual operating "
87 "parameters require larger buffers, an attempt to reallocate "
90 static int min_buffers
= 1;
91 module_param(min_buffers
, uint
, 0644);
92 MODULE_PARM_DESC(min_buffers
,
93 "The minimum number of streaming I/O buffers we are willing "
96 static int max_buffers
= 10;
97 module_param(max_buffers
, uint
, 0644);
98 MODULE_PARM_DESC(max_buffers
,
99 "The maximum number of streaming I/O buffers an application "
100 "will be allowed to allocate. These buffers are big and live "
101 "in vmalloc space.");
104 module_param(flip
, bool, 0444);
105 MODULE_PARM_DESC(flip
,
106 "If set, the sensor will be instructed to flip the image "
111 S_NOTREADY
, /* Not yet initialized */
112 S_IDLE
, /* Just hanging around */
113 S_FLAKED
, /* Some sort of problem */
114 S_SINGLEREAD
, /* In read() */
115 S_SPECREAD
, /* Speculative read (for future read()) */
116 S_STREAMING
/* Streaming data */
120 * Tracking of streaming I/O buffers.
122 struct cafe_sio_buffer
{
123 struct list_head list
;
124 struct v4l2_buffer v4lbuf
;
125 char *buffer
; /* Where it lives in kernel space */
127 struct cafe_camera
*cam
;
131 * A description of one of our devices.
132 * Locking: controlled by s_mutex. Certain fields, however, require
133 * the dev_lock spinlock; they are marked as such by comments.
134 * dev_lock is also required for access to device registers.
138 enum cafe_state state
;
139 unsigned long flags
; /* Buffer status, mainly (dev_lock) */
140 int users
; /* How many open FDs */
141 struct file
*owner
; /* Who has data access (v4l2) */
144 * Subsystem structures.
146 struct pci_dev
*pdev
;
147 struct video_device v4ldev
;
148 struct i2c_adapter i2c_adapter
;
149 struct i2c_client
*sensor
;
151 unsigned char __iomem
*regs
;
152 struct list_head dev_list
; /* link to other devices */
155 unsigned int nbufs
; /* How many are alloc'd */
156 int next_buf
; /* Next to consume (dev_lock) */
157 unsigned int dma_buf_size
; /* allocated size */
158 void *dma_bufs
[MAX_DMA_BUFS
]; /* Internal buffer addresses */
159 dma_addr_t dma_handles
[MAX_DMA_BUFS
]; /* Buffer bus addresses */
160 unsigned int specframes
; /* Unconsumed spec frames (dev_lock) */
161 unsigned int sequence
; /* Frame sequence number */
162 unsigned int buf_seq
[MAX_DMA_BUFS
]; /* Sequence for individual buffers */
164 /* Streaming buffers */
165 unsigned int n_sbufs
; /* How many we have */
166 struct cafe_sio_buffer
*sb_bufs
; /* The array of housekeeping structs */
167 struct list_head sb_avail
; /* Available for data (we own) (dev_lock) */
168 struct list_head sb_full
; /* With data (user space owns) (dev_lock) */
169 struct tasklet_struct s_tasklet
;
171 /* Current operating parameters */
172 u32 sensor_type
; /* Currently ov7670 only */
173 struct v4l2_pix_format pix_format
;
176 struct mutex s_mutex
; /* Access to this structure */
177 spinlock_t dev_lock
; /* Access to device */
180 wait_queue_head_t smbus_wait
; /* Waiting on i2c events */
181 wait_queue_head_t iowait
; /* Waiting on frame data */
182 #ifdef CONFIG_VIDEO_ADV_DEBUG
183 struct dentry
*dfs_regs
;
184 struct dentry
*dfs_cam_regs
;
189 * Status flags. Always manipulated with bit operations.
191 #define CF_BUF0_VALID 0 /* Buffers valid - first three */
192 #define CF_BUF1_VALID 1
193 #define CF_BUF2_VALID 2
194 #define CF_DMA_ACTIVE 3 /* A frame is incoming */
195 #define CF_CONFIG_NEEDED 4 /* Must configure hardware */
200 * Start over with DMA buffers - dev_lock needed.
202 static void cafe_reset_buffers(struct cafe_camera
*cam
)
207 for (i
= 0; i
< cam
->nbufs
; i
++)
208 clear_bit(i
, &cam
->flags
);
212 static inline int cafe_needs_config(struct cafe_camera
*cam
)
214 return test_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
217 static void cafe_set_config_needed(struct cafe_camera
*cam
, int needed
)
220 set_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
222 clear_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
229 * Debugging and related.
231 #define cam_err(cam, fmt, arg...) \
232 dev_err(&(cam)->pdev->dev, fmt, ##arg);
233 #define cam_warn(cam, fmt, arg...) \
234 dev_warn(&(cam)->pdev->dev, fmt, ##arg);
235 #define cam_dbg(cam, fmt, arg...) \
236 dev_dbg(&(cam)->pdev->dev, fmt, ##arg);
239 /* ---------------------------------------------------------------------*/
241 * We keep a simple list of known devices to search at open time.
243 static LIST_HEAD(cafe_dev_list
);
244 static DEFINE_MUTEX(cafe_dev_list_lock
);
246 static void cafe_add_dev(struct cafe_camera
*cam
)
248 mutex_lock(&cafe_dev_list_lock
);
249 list_add_tail(&cam
->dev_list
, &cafe_dev_list
);
250 mutex_unlock(&cafe_dev_list_lock
);
253 static void cafe_remove_dev(struct cafe_camera
*cam
)
255 mutex_lock(&cafe_dev_list_lock
);
256 list_del(&cam
->dev_list
);
257 mutex_unlock(&cafe_dev_list_lock
);
260 static struct cafe_camera
*cafe_find_dev(int minor
)
262 struct cafe_camera
*cam
;
264 mutex_lock(&cafe_dev_list_lock
);
265 list_for_each_entry(cam
, &cafe_dev_list
, dev_list
) {
266 if (cam
->v4ldev
.minor
== minor
)
271 mutex_unlock(&cafe_dev_list_lock
);
276 static struct cafe_camera
*cafe_find_by_pdev(struct pci_dev
*pdev
)
278 struct cafe_camera
*cam
;
280 mutex_lock(&cafe_dev_list_lock
);
281 list_for_each_entry(cam
, &cafe_dev_list
, dev_list
) {
282 if (cam
->pdev
== pdev
)
287 mutex_unlock(&cafe_dev_list_lock
);
292 /* ------------------------------------------------------------------------ */
294 * Device register I/O
296 static inline void cafe_reg_write(struct cafe_camera
*cam
, unsigned int reg
,
299 iowrite32(val
, cam
->regs
+ reg
);
302 static inline unsigned int cafe_reg_read(struct cafe_camera
*cam
,
305 return ioread32(cam
->regs
+ reg
);
309 static inline void cafe_reg_write_mask(struct cafe_camera
*cam
, unsigned int reg
,
310 unsigned int val
, unsigned int mask
)
312 unsigned int v
= cafe_reg_read(cam
, reg
);
314 v
= (v
& ~mask
) | (val
& mask
);
315 cafe_reg_write(cam
, reg
, v
);
318 static inline void cafe_reg_clear_bit(struct cafe_camera
*cam
,
319 unsigned int reg
, unsigned int val
)
321 cafe_reg_write_mask(cam
, reg
, 0, val
);
324 static inline void cafe_reg_set_bit(struct cafe_camera
*cam
,
325 unsigned int reg
, unsigned int val
)
327 cafe_reg_write_mask(cam
, reg
, val
, val
);
332 /* -------------------------------------------------------------------- */
334 * The I2C/SMBUS interface to the camera itself starts here. The
335 * controller handles SMBUS itself, presenting a relatively simple register
336 * interface; all we have to do is to tell it where to route the data.
338 #define CAFE_SMBUS_TIMEOUT (HZ) /* generous */
340 static int cafe_smbus_write_done(struct cafe_camera
*cam
)
346 * We must delay after the interrupt, or the controller gets confused
347 * and never does give us good status. Fortunately, we don't do this
351 spin_lock_irqsave(&cam
->dev_lock
, flags
);
352 c1
= cafe_reg_read(cam
, REG_TWSIC1
);
353 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
354 return (c1
& (TWSIC1_WSTAT
|TWSIC1_ERROR
)) != TWSIC1_WSTAT
;
357 static int cafe_smbus_write_data(struct cafe_camera
*cam
,
358 u16 addr
, u8 command
, u8 value
)
362 DEFINE_WAIT(the_wait
);
364 spin_lock_irqsave(&cam
->dev_lock
, flags
);
365 rval
= TWSIC0_EN
| ((addr
<< TWSIC0_SID_SHIFT
) & TWSIC0_SID
);
366 rval
|= TWSIC0_OVMAGIC
; /* Make OV sensors work */
368 * Marvell sez set clkdiv to all 1's for now.
370 rval
|= TWSIC0_CLKDIV
;
371 cafe_reg_write(cam
, REG_TWSIC0
, rval
);
372 (void) cafe_reg_read(cam
, REG_TWSIC1
); /* force write */
373 rval
= value
| ((command
<< TWSIC1_ADDR_SHIFT
) & TWSIC1_ADDR
);
374 cafe_reg_write(cam
, REG_TWSIC1
, rval
);
375 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
378 * Time to wait for the write to complete. THIS IS A RACY
379 * WAY TO DO IT, but the sad fact is that reading the TWSIC1
380 * register too quickly after starting the operation sends
381 * the device into a place that may be kinder and better, but
382 * which is absolutely useless for controlling the sensor. In
383 * practice we have plenty of time to get into our sleep state
384 * before the interrupt hits, and the worst case is that we
385 * time out and then see that things completed, so this seems
386 * the best way for now.
389 prepare_to_wait(&cam
->smbus_wait
, &the_wait
,
390 TASK_UNINTERRUPTIBLE
);
391 schedule_timeout(1); /* even 1 jiffy is too long */
392 finish_wait(&cam
->smbus_wait
, &the_wait
);
393 } while (!cafe_smbus_write_done(cam
));
395 #ifdef IF_THE_CAFE_HARDWARE_WORKED_RIGHT
396 wait_event_timeout(cam
->smbus_wait
, cafe_smbus_write_done(cam
),
399 spin_lock_irqsave(&cam
->dev_lock
, flags
);
400 rval
= cafe_reg_read(cam
, REG_TWSIC1
);
401 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
403 if (rval
& TWSIC1_WSTAT
) {
404 cam_err(cam
, "SMBUS write (%02x/%02x/%02x) timed out\n", addr
,
408 if (rval
& TWSIC1_ERROR
) {
409 cam_err(cam
, "SMBUS write (%02x/%02x/%02x) error\n", addr
,
418 static int cafe_smbus_read_done(struct cafe_camera
*cam
)
424 * We must delay after the interrupt, or the controller gets confused
425 * and never does give us good status. Fortunately, we don't do this
429 spin_lock_irqsave(&cam
->dev_lock
, flags
);
430 c1
= cafe_reg_read(cam
, REG_TWSIC1
);
431 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
432 return c1
& (TWSIC1_RVALID
|TWSIC1_ERROR
);
437 static int cafe_smbus_read_data(struct cafe_camera
*cam
,
438 u16 addr
, u8 command
, u8
*value
)
443 spin_lock_irqsave(&cam
->dev_lock
, flags
);
444 rval
= TWSIC0_EN
| ((addr
<< TWSIC0_SID_SHIFT
) & TWSIC0_SID
);
445 rval
|= TWSIC0_OVMAGIC
; /* Make OV sensors work */
447 * Marvel sez set clkdiv to all 1's for now.
449 rval
|= TWSIC0_CLKDIV
;
450 cafe_reg_write(cam
, REG_TWSIC0
, rval
);
451 (void) cafe_reg_read(cam
, REG_TWSIC1
); /* force write */
452 rval
= TWSIC1_READ
| ((command
<< TWSIC1_ADDR_SHIFT
) & TWSIC1_ADDR
);
453 cafe_reg_write(cam
, REG_TWSIC1
, rval
);
454 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
456 wait_event_timeout(cam
->smbus_wait
,
457 cafe_smbus_read_done(cam
), CAFE_SMBUS_TIMEOUT
);
458 spin_lock_irqsave(&cam
->dev_lock
, flags
);
459 rval
= cafe_reg_read(cam
, REG_TWSIC1
);
460 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
462 if (rval
& TWSIC1_ERROR
) {
463 cam_err(cam
, "SMBUS read (%02x/%02x) error\n", addr
, command
);
466 if (! (rval
& TWSIC1_RVALID
)) {
467 cam_err(cam
, "SMBUS read (%02x/%02x) timed out\n", addr
,
471 *value
= rval
& 0xff;
476 * Perform a transfer over SMBUS. This thing is called under
477 * the i2c bus lock, so we shouldn't race with ourselves...
479 static int cafe_smbus_xfer(struct i2c_adapter
*adapter
, u16 addr
,
480 unsigned short flags
, char rw
, u8 command
,
481 int size
, union i2c_smbus_data
*data
)
483 struct cafe_camera
*cam
= i2c_get_adapdata(adapter
);
487 * Refuse to talk to anything but OV cam chips. We should
488 * never even see an attempt to do so, but one never knows.
490 if (cam
->sensor
&& addr
!= cam
->sensor
->addr
) {
491 cam_err(cam
, "funky smbus addr %d\n", addr
);
495 * This interface would appear to only do byte data ops. OK
496 * it can do word too, but the cam chip has no use for that.
498 if (size
!= I2C_SMBUS_BYTE_DATA
) {
499 cam_err(cam
, "funky xfer size %d\n", size
);
503 if (rw
== I2C_SMBUS_WRITE
)
504 ret
= cafe_smbus_write_data(cam
, addr
, command
, data
->byte
);
505 else if (rw
== I2C_SMBUS_READ
)
506 ret
= cafe_smbus_read_data(cam
, addr
, command
, &data
->byte
);
511 static void cafe_smbus_enable_irq(struct cafe_camera
*cam
)
515 spin_lock_irqsave(&cam
->dev_lock
, flags
);
516 cafe_reg_set_bit(cam
, REG_IRQMASK
, TWSIIRQS
);
517 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
520 static u32
cafe_smbus_func(struct i2c_adapter
*adapter
)
522 return I2C_FUNC_SMBUS_READ_BYTE_DATA
|
523 I2C_FUNC_SMBUS_WRITE_BYTE_DATA
;
526 static struct i2c_algorithm cafe_smbus_algo
= {
527 .smbus_xfer
= cafe_smbus_xfer
,
528 .functionality
= cafe_smbus_func
531 /* Somebody is on the bus */
532 static int cafe_cam_init(struct cafe_camera
*cam
);
533 static void cafe_ctlr_stop_dma(struct cafe_camera
*cam
);
534 static void cafe_ctlr_power_down(struct cafe_camera
*cam
);
536 static int cafe_smbus_attach(struct i2c_client
*client
)
538 struct cafe_camera
*cam
= i2c_get_adapdata(client
->adapter
);
541 * Don't talk to chips we don't recognize.
543 if (client
->driver
->id
== I2C_DRIVERID_OV7670
) {
544 cam
->sensor
= client
;
545 return cafe_cam_init(cam
);
550 static int cafe_smbus_detach(struct i2c_client
*client
)
552 struct cafe_camera
*cam
= i2c_get_adapdata(client
->adapter
);
554 if (cam
->sensor
== client
) {
555 cafe_ctlr_stop_dma(cam
);
556 cafe_ctlr_power_down(cam
);
557 cam_err(cam
, "lost the sensor!\n");
558 cam
->sensor
= NULL
; /* Bummer, no camera */
559 cam
->state
= S_NOTREADY
;
564 static int cafe_smbus_setup(struct cafe_camera
*cam
)
566 struct i2c_adapter
*adap
= &cam
->i2c_adapter
;
569 cafe_smbus_enable_irq(cam
);
570 adap
->id
= I2C_HW_SMBUS_CAFE
;
571 adap
->class = I2C_CLASS_CAM_DIGITAL
;
572 adap
->owner
= THIS_MODULE
;
573 adap
->client_register
= cafe_smbus_attach
;
574 adap
->client_unregister
= cafe_smbus_detach
;
575 adap
->algo
= &cafe_smbus_algo
;
576 strcpy(adap
->name
, "cafe_ccic");
577 adap
->dev
.parent
= &cam
->pdev
->dev
;
578 i2c_set_adapdata(adap
, cam
);
579 ret
= i2c_add_adapter(adap
);
581 printk(KERN_ERR
"Unable to register cafe i2c adapter\n");
585 static void cafe_smbus_shutdown(struct cafe_camera
*cam
)
587 i2c_del_adapter(&cam
->i2c_adapter
);
591 /* ------------------------------------------------------------------- */
593 * Deal with the controller.
597 * Do everything we think we need to have the interface operating
598 * according to the desired format.
600 static void cafe_ctlr_dma(struct cafe_camera
*cam
)
603 * Store the first two Y buffers (we aren't supporting
604 * planar formats for now, so no UV bufs). Then either
605 * set the third if it exists, or tell the controller
608 cafe_reg_write(cam
, REG_Y0BAR
, cam
->dma_handles
[0]);
609 cafe_reg_write(cam
, REG_Y1BAR
, cam
->dma_handles
[1]);
610 if (cam
->nbufs
> 2) {
611 cafe_reg_write(cam
, REG_Y2BAR
, cam
->dma_handles
[2]);
612 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_TWOBUFS
);
615 cafe_reg_set_bit(cam
, REG_CTRL1
, C1_TWOBUFS
);
616 cafe_reg_write(cam
, REG_UBAR
, 0); /* 32 bits only for now */
619 static void cafe_ctlr_image(struct cafe_camera
*cam
)
622 struct v4l2_pix_format
*fmt
= &cam
->pix_format
;
624 imgsz
= ((fmt
->height
<< IMGSZ_V_SHIFT
) & IMGSZ_V_MASK
) |
625 (fmt
->bytesperline
& IMGSZ_H_MASK
);
626 cafe_reg_write(cam
, REG_IMGSIZE
, imgsz
);
627 cafe_reg_write(cam
, REG_IMGOFFSET
, 0);
628 /* YPITCH just drops the last two bits */
629 cafe_reg_write_mask(cam
, REG_IMGPITCH
, fmt
->bytesperline
,
632 * Tell the controller about the image format we are using.
634 switch (cam
->pix_format
.pixelformat
) {
635 case V4L2_PIX_FMT_YUYV
:
636 cafe_reg_write_mask(cam
, REG_CTRL0
,
637 C0_DF_YUV
|C0_YUV_PACKED
|C0_YUVE_YUYV
,
641 case V4L2_PIX_FMT_RGB444
:
642 cafe_reg_write_mask(cam
, REG_CTRL0
,
643 C0_DF_RGB
|C0_RGBF_444
|C0_RGB4_XRGB
,
648 case V4L2_PIX_FMT_RGB565
:
649 cafe_reg_write_mask(cam
, REG_CTRL0
,
650 C0_DF_RGB
|C0_RGBF_565
|C0_RGB5_BGGR
,
655 cam_err(cam
, "Unknown format %x\n", cam
->pix_format
.pixelformat
);
659 * Make sure it knows we want to use hsync/vsync.
661 cafe_reg_write_mask(cam
, REG_CTRL0
, C0_SIF_HVSYNC
,
667 * Configure the controller for operation; caller holds the
670 static int cafe_ctlr_configure(struct cafe_camera
*cam
)
674 spin_lock_irqsave(&cam
->dev_lock
, flags
);
676 cafe_ctlr_image(cam
);
677 cafe_set_config_needed(cam
, 0);
678 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
682 static void cafe_ctlr_irq_enable(struct cafe_camera
*cam
)
685 * Clear any pending interrupts, since we do not
686 * expect to have I/O active prior to enabling.
688 cafe_reg_write(cam
, REG_IRQSTAT
, FRAMEIRQS
);
689 cafe_reg_set_bit(cam
, REG_IRQMASK
, FRAMEIRQS
);
692 static void cafe_ctlr_irq_disable(struct cafe_camera
*cam
)
694 cafe_reg_clear_bit(cam
, REG_IRQMASK
, FRAMEIRQS
);
698 * Make the controller start grabbing images. Everything must
699 * be set up before doing this.
701 static void cafe_ctlr_start(struct cafe_camera
*cam
)
703 /* set_bit performs a read, so no other barrier should be
705 cafe_reg_set_bit(cam
, REG_CTRL0
, C0_ENABLE
);
708 static void cafe_ctlr_stop(struct cafe_camera
*cam
)
710 cafe_reg_clear_bit(cam
, REG_CTRL0
, C0_ENABLE
);
713 static void cafe_ctlr_init(struct cafe_camera
*cam
)
717 spin_lock_irqsave(&cam
->dev_lock
, flags
);
719 * Added magic to bring up the hardware on the B-Test board
721 cafe_reg_write(cam
, 0x3038, 0x8);
722 cafe_reg_write(cam
, 0x315c, 0x80008);
724 * Go through the dance needed to wake the device up.
725 * Note that these registers are global and shared
726 * with the NAND and SD devices. Interaction between the
727 * three still needs to be examined.
729 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRS
|GCSR_MRS
); /* Needed? */
730 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRC
|GCSR_MRC
);
731 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRC
|GCSR_MRS
);
733 * Here we must wait a bit for the controller to come around.
735 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
737 spin_lock_irqsave(&cam
->dev_lock
, flags
);
739 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_CCIC_EN
|GCSR_SRC
|GCSR_MRC
);
740 cafe_reg_set_bit(cam
, REG_GL_IMASK
, GIMSK_CCIC_EN
);
742 * Make sure it's not powered down.
744 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
746 * Turn off the enable bit. It sure should be off anyway,
747 * but it's good to be sure.
749 cafe_reg_clear_bit(cam
, REG_CTRL0
, C0_ENABLE
);
751 * Mask all interrupts.
753 cafe_reg_write(cam
, REG_IRQMASK
, 0);
755 * Clock the sensor appropriately. Controller clock should
756 * be 48MHz, sensor "typical" value is half that.
758 cafe_reg_write_mask(cam
, REG_CLKCTRL
, 2, CLK_DIV_MASK
);
759 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
764 * Stop the controller, and don't return until we're really sure that no
765 * further DMA is going on.
767 static void cafe_ctlr_stop_dma(struct cafe_camera
*cam
)
772 * Theory: stop the camera controller (whether it is operating
773 * or not). Delay briefly just in case we race with the SOF
774 * interrupt, then wait until no DMA is active.
776 spin_lock_irqsave(&cam
->dev_lock
, flags
);
778 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
780 wait_event_timeout(cam
->iowait
,
781 !test_bit(CF_DMA_ACTIVE
, &cam
->flags
), HZ
);
782 if (test_bit(CF_DMA_ACTIVE
, &cam
->flags
))
783 cam_err(cam
, "Timeout waiting for DMA to end\n");
784 /* This would be bad news - what now? */
785 spin_lock_irqsave(&cam
->dev_lock
, flags
);
787 cafe_ctlr_irq_disable(cam
);
788 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
794 static void cafe_ctlr_power_up(struct cafe_camera
*cam
)
798 spin_lock_irqsave(&cam
->dev_lock
, flags
);
799 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
801 * Part one of the sensor dance: turn the global
804 cafe_reg_write(cam
, REG_GL_FCR
, GFCR_GPIO_ON
);
805 cafe_reg_write(cam
, REG_GL_GPIOR
, GGPIO_OUT
|GGPIO_VAL
);
807 * Put the sensor into operational mode (assumes OLPC-style
808 * wiring). Control 0 is reset - set to 1 to operate.
809 * Control 1 is power down, set to 0 to operate.
811 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
); /* pwr up, reset */
812 // mdelay(1); /* Marvell says 1ms will do it */
813 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
|GPR_C0
);
814 // mdelay(1); /* Enough? */
815 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
816 msleep(5); /* Just to be sure */
819 static void cafe_ctlr_power_down(struct cafe_camera
*cam
)
823 spin_lock_irqsave(&cam
->dev_lock
, flags
);
824 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
|GPR_C1
);
825 cafe_reg_write(cam
, REG_GL_FCR
, GFCR_GPIO_ON
);
826 cafe_reg_write(cam
, REG_GL_GPIOR
, GGPIO_OUT
);
827 cafe_reg_set_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
828 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
831 /* -------------------------------------------------------------------- */
833 * Communications with the sensor.
836 static int __cafe_cam_cmd(struct cafe_camera
*cam
, int cmd
, void *arg
)
838 struct i2c_client
*sc
= cam
->sensor
;
841 if (sc
== NULL
|| sc
->driver
== NULL
|| sc
->driver
->command
== NULL
)
843 ret
= sc
->driver
->command(sc
, cmd
, arg
);
844 if (ret
== -EPERM
) /* Unsupported command */
849 static int __cafe_cam_reset(struct cafe_camera
*cam
)
852 return __cafe_cam_cmd(cam
, VIDIOC_INT_RESET
, &zero
);
856 * We have found the sensor on the i2c. Let's try to have a
859 static int cafe_cam_init(struct cafe_camera
*cam
)
861 struct v4l2_chip_ident chip
= { V4L2_CHIP_MATCH_I2C_ADDR
, 0, 0, 0 };
864 mutex_lock(&cam
->s_mutex
);
865 if (cam
->state
!= S_NOTREADY
)
866 cam_warn(cam
, "Cam init with device in funky state %d",
868 ret
= __cafe_cam_reset(cam
);
871 chip
.match_chip
= cam
->sensor
->addr
;
872 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_CHIP_IDENT
, &chip
);
875 cam
->sensor_type
= chip
.ident
;
876 // if (cam->sensor->addr != OV7xx0_SID) {
877 if (cam
->sensor_type
!= V4L2_IDENT_OV7670
) {
878 cam_err(cam
, "Unsupported sensor type %d", cam
->sensor
->addr
);
882 /* Get/set parameters? */
886 cafe_ctlr_power_down(cam
);
887 mutex_unlock(&cam
->s_mutex
);
892 * Configure the sensor to match the parameters we have. Caller should
895 static int cafe_cam_set_flip(struct cafe_camera
*cam
)
897 struct v4l2_control ctrl
;
899 memset(&ctrl
, 0, sizeof(ctrl
));
900 ctrl
.id
= V4L2_CID_VFLIP
;
902 return __cafe_cam_cmd(cam
, VIDIOC_S_CTRL
, &ctrl
);
906 static int cafe_cam_configure(struct cafe_camera
*cam
)
908 struct v4l2_format fmt
;
911 if (cam
->state
!= S_IDLE
)
913 fmt
.fmt
.pix
= cam
->pix_format
;
914 ret
= __cafe_cam_cmd(cam
, VIDIOC_INT_INIT
, &zero
);
916 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_FMT
, &fmt
);
918 * OV7670 does weird things if flip is set *before* format...
920 ret
+= cafe_cam_set_flip(cam
);
924 /* -------------------------------------------------------------------- */
926 * DMA buffer management. These functions need s_mutex held.
929 /* FIXME: this is inefficient as hell, since dma_alloc_coherent just
930 * does a get_free_pages() call, and we waste a good chunk of an orderN
931 * allocation. Should try to allocate the whole set in one chunk.
933 static int cafe_alloc_dma_bufs(struct cafe_camera
*cam
, int loadtime
)
937 cafe_set_config_needed(cam
, 1);
939 cam
->dma_buf_size
= dma_buf_size
;
941 cam
->dma_buf_size
= cam
->pix_format
.sizeimage
;
946 for (i
= 0; i
< n_dma_bufs
; i
++) {
947 cam
->dma_bufs
[i
] = dma_alloc_coherent(&cam
->pdev
->dev
,
948 cam
->dma_buf_size
, cam
->dma_handles
+ i
,
950 if (cam
->dma_bufs
[i
] == NULL
) {
951 cam_warn(cam
, "Failed to allocate DMA buffer\n");
954 /* For debug, remove eventually */
955 memset(cam
->dma_bufs
[i
], 0xcc, cam
->dma_buf_size
);
959 switch (cam
->nbufs
) {
961 dma_free_coherent(&cam
->pdev
->dev
, cam
->dma_buf_size
,
962 cam
->dma_bufs
[0], cam
->dma_handles
[0]);
965 cam_err(cam
, "Insufficient DMA buffers, cannot operate\n");
970 cam_warn(cam
, "Will limp along with only 2 buffers\n");
976 static void cafe_free_dma_bufs(struct cafe_camera
*cam
)
980 for (i
= 0; i
< cam
->nbufs
; i
++) {
981 dma_free_coherent(&cam
->pdev
->dev
, cam
->dma_buf_size
,
982 cam
->dma_bufs
[i
], cam
->dma_handles
[i
]);
983 cam
->dma_bufs
[i
] = NULL
;
992 /* ----------------------------------------------------------------------- */
994 * Here starts the V4L2 interface code.
998 * Read an image from the device.
1000 static ssize_t
cafe_deliver_buffer(struct cafe_camera
*cam
,
1001 char __user
*buffer
, size_t len
, loff_t
*pos
)
1004 unsigned long flags
;
1006 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1007 if (cam
->next_buf
< 0) {
1008 cam_err(cam
, "deliver_buffer: No next buffer\n");
1009 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1012 bufno
= cam
->next_buf
;
1013 clear_bit(bufno
, &cam
->flags
);
1014 if (++(cam
->next_buf
) >= cam
->nbufs
)
1016 if (! test_bit(cam
->next_buf
, &cam
->flags
))
1018 cam
->specframes
= 0;
1019 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1021 if (len
> cam
->pix_format
.sizeimage
)
1022 len
= cam
->pix_format
.sizeimage
;
1023 if (copy_to_user(buffer
, cam
->dma_bufs
[bufno
], len
))
1030 * Get everything ready, and start grabbing frames.
1032 static int cafe_read_setup(struct cafe_camera
*cam
, enum cafe_state state
)
1035 unsigned long flags
;
1038 * Configuration. If we still don't have DMA buffers,
1039 * make one last, desperate attempt.
1041 if (cam
->nbufs
== 0)
1042 if (cafe_alloc_dma_bufs(cam
, 0))
1045 if (cafe_needs_config(cam
)) {
1046 cafe_cam_configure(cam
);
1047 ret
= cafe_ctlr_configure(cam
);
1055 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1056 cafe_reset_buffers(cam
);
1057 cafe_ctlr_irq_enable(cam
);
1059 cafe_ctlr_start(cam
);
1060 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1065 static ssize_t
cafe_v4l_read(struct file
*filp
,
1066 char __user
*buffer
, size_t len
, loff_t
*pos
)
1068 struct cafe_camera
*cam
= filp
->private_data
;
1072 * Perhaps we're in speculative read mode and already
1075 mutex_lock(&cam
->s_mutex
);
1076 if (cam
->state
== S_SPECREAD
) {
1077 if (cam
->next_buf
>= 0) {
1078 ret
= cafe_deliver_buffer(cam
, buffer
, len
, pos
);
1082 } else if (cam
->state
== S_FLAKED
|| cam
->state
== S_NOTREADY
) {
1085 } else if (cam
->state
!= S_IDLE
) {
1091 * v4l2: multiple processes can open the device, but only
1092 * one gets to grab data from it.
1094 if (cam
->owner
&& cam
->owner
!= filp
) {
1101 * Do setup if need be.
1103 if (cam
->state
!= S_SPECREAD
) {
1104 ret
= cafe_read_setup(cam
, S_SINGLEREAD
);
1109 * Wait for something to happen. This should probably
1110 * be interruptible (FIXME).
1112 wait_event_timeout(cam
->iowait
, cam
->next_buf
>= 0, HZ
);
1113 if (cam
->next_buf
< 0) {
1114 cam_err(cam
, "read() operation timed out\n");
1115 cafe_ctlr_stop_dma(cam
);
1120 * Give them their data and we should be done.
1122 ret
= cafe_deliver_buffer(cam
, buffer
, len
, pos
);
1125 mutex_unlock(&cam
->s_mutex
);
1137 * Streaming I/O support.
1142 static int cafe_vidioc_streamon(struct file
*filp
, void *priv
,
1143 enum v4l2_buf_type type
)
1145 struct cafe_camera
*cam
= filp
->private_data
;
1148 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1150 mutex_lock(&cam
->s_mutex
);
1151 if (cam
->state
!= S_IDLE
|| cam
->n_sbufs
== 0)
1155 ret
= cafe_read_setup(cam
, S_STREAMING
);
1158 mutex_unlock(&cam
->s_mutex
);
1164 static int cafe_vidioc_streamoff(struct file
*filp
, void *priv
,
1165 enum v4l2_buf_type type
)
1167 struct cafe_camera
*cam
= filp
->private_data
;
1170 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1172 mutex_lock(&cam
->s_mutex
);
1173 if (cam
->state
!= S_STREAMING
)
1176 cafe_ctlr_stop_dma(cam
);
1180 mutex_unlock(&cam
->s_mutex
);
1187 static int cafe_setup_siobuf(struct cafe_camera
*cam
, int index
)
1189 struct cafe_sio_buffer
*buf
= cam
->sb_bufs
+ index
;
1191 INIT_LIST_HEAD(&buf
->list
);
1192 buf
->v4lbuf
.length
= PAGE_ALIGN(cam
->pix_format
.sizeimage
);
1193 buf
->buffer
= vmalloc_user(buf
->v4lbuf
.length
);
1194 if (buf
->buffer
== NULL
)
1199 buf
->v4lbuf
.index
= index
;
1200 buf
->v4lbuf
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1201 buf
->v4lbuf
.field
= V4L2_FIELD_NONE
;
1202 buf
->v4lbuf
.memory
= V4L2_MEMORY_MMAP
;
1204 * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg
1205 * just uses the length times the index, but the spec warns
1206 * against doing just that - vma merging problems. So we
1207 * leave a gap between each pair of buffers.
1209 buf
->v4lbuf
.m
.offset
= 2*index
*buf
->v4lbuf
.length
;
1213 static int cafe_free_sio_buffers(struct cafe_camera
*cam
)
1218 * If any buffers are mapped, we cannot free them at all.
1220 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1221 if (cam
->sb_bufs
[i
].mapcount
> 0)
1226 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1227 vfree(cam
->sb_bufs
[i
].buffer
);
1229 kfree(cam
->sb_bufs
);
1230 cam
->sb_bufs
= NULL
;
1231 INIT_LIST_HEAD(&cam
->sb_avail
);
1232 INIT_LIST_HEAD(&cam
->sb_full
);
1238 static int cafe_vidioc_reqbufs(struct file
*filp
, void *priv
,
1239 struct v4l2_requestbuffers
*req
)
1241 struct cafe_camera
*cam
= filp
->private_data
;
1242 int ret
= 0; /* Silence warning */
1245 * Make sure it's something we can do. User pointers could be
1246 * implemented without great pain, but that's not been done yet.
1248 if (req
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1250 if (req
->memory
!= V4L2_MEMORY_MMAP
)
1253 * If they ask for zero buffers, they really want us to stop streaming
1254 * (if it's happening) and free everything. Should we check owner?
1256 mutex_lock(&cam
->s_mutex
);
1257 if (req
->count
== 0) {
1258 if (cam
->state
== S_STREAMING
)
1259 cafe_ctlr_stop_dma(cam
);
1260 ret
= cafe_free_sio_buffers (cam
);
1264 * Device needs to be idle and working. We *could* try to do the
1265 * right thing in S_SPECREAD by shutting things down, but it
1266 * probably doesn't matter.
1268 if (cam
->state
!= S_IDLE
|| (cam
->owner
&& cam
->owner
!= filp
)) {
1274 if (req
->count
< min_buffers
)
1275 req
->count
= min_buffers
;
1276 else if (req
->count
> max_buffers
)
1277 req
->count
= max_buffers
;
1278 if (cam
->n_sbufs
> 0) {
1279 ret
= cafe_free_sio_buffers(cam
);
1284 cam
->sb_bufs
= kzalloc(req
->count
*sizeof(struct cafe_sio_buffer
),
1286 if (cam
->sb_bufs
== NULL
) {
1290 for (cam
->n_sbufs
= 0; cam
->n_sbufs
< req
->count
; (cam
->n_sbufs
++)) {
1291 ret
= cafe_setup_siobuf(cam
, cam
->n_sbufs
);
1296 if (cam
->n_sbufs
== 0) /* no luck at all - ret already set */
1297 kfree(cam
->sb_bufs
);
1298 req
->count
= cam
->n_sbufs
; /* In case of partial success */
1301 mutex_unlock(&cam
->s_mutex
);
1306 static int cafe_vidioc_querybuf(struct file
*filp
, void *priv
,
1307 struct v4l2_buffer
*buf
)
1309 struct cafe_camera
*cam
= filp
->private_data
;
1312 mutex_lock(&cam
->s_mutex
);
1313 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1315 if (buf
->index
< 0 || buf
->index
>= cam
->n_sbufs
)
1317 *buf
= cam
->sb_bufs
[buf
->index
].v4lbuf
;
1320 mutex_unlock(&cam
->s_mutex
);
1324 static int cafe_vidioc_qbuf(struct file
*filp
, void *priv
,
1325 struct v4l2_buffer
*buf
)
1327 struct cafe_camera
*cam
= filp
->private_data
;
1328 struct cafe_sio_buffer
*sbuf
;
1330 unsigned long flags
;
1332 mutex_lock(&cam
->s_mutex
);
1333 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1335 if (buf
->index
< 0 || buf
->index
>= cam
->n_sbufs
)
1337 sbuf
= cam
->sb_bufs
+ buf
->index
;
1338 if (sbuf
->v4lbuf
.flags
& V4L2_BUF_FLAG_QUEUED
) {
1339 ret
= 0; /* Already queued?? */
1342 if (sbuf
->v4lbuf
.flags
& V4L2_BUF_FLAG_DONE
) {
1343 /* Spec doesn't say anything, seems appropriate tho */
1347 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_QUEUED
;
1348 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1349 list_add(&sbuf
->list
, &cam
->sb_avail
);
1350 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1353 mutex_unlock(&cam
->s_mutex
);
1357 static int cafe_vidioc_dqbuf(struct file
*filp
, void *priv
,
1358 struct v4l2_buffer
*buf
)
1360 struct cafe_camera
*cam
= filp
->private_data
;
1361 struct cafe_sio_buffer
*sbuf
;
1363 unsigned long flags
;
1365 mutex_lock(&cam
->s_mutex
);
1366 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1368 if (cam
->state
!= S_STREAMING
)
1370 if (list_empty(&cam
->sb_full
) && filp
->f_flags
& O_NONBLOCK
) {
1375 while (list_empty(&cam
->sb_full
) && cam
->state
== S_STREAMING
) {
1376 mutex_unlock(&cam
->s_mutex
);
1377 if (wait_event_interruptible(cam
->iowait
,
1378 !list_empty(&cam
->sb_full
))) {
1382 mutex_lock(&cam
->s_mutex
);
1385 if (cam
->state
!= S_STREAMING
)
1388 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1389 /* Should probably recheck !list_empty() here */
1390 sbuf
= list_entry(cam
->sb_full
.next
,
1391 struct cafe_sio_buffer
, list
);
1392 list_del_init(&sbuf
->list
);
1393 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1394 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_DONE
;
1395 *buf
= sbuf
->v4lbuf
;
1400 mutex_unlock(&cam
->s_mutex
);
1407 static void cafe_v4l_vm_open(struct vm_area_struct
*vma
)
1409 struct cafe_sio_buffer
*sbuf
= vma
->vm_private_data
;
1411 * Locking: done under mmap_sem, so we don't need to
1412 * go back to the camera lock here.
1418 static void cafe_v4l_vm_close(struct vm_area_struct
*vma
)
1420 struct cafe_sio_buffer
*sbuf
= vma
->vm_private_data
;
1422 mutex_lock(&sbuf
->cam
->s_mutex
);
1424 /* Docs say we should stop I/O too... */
1425 if (sbuf
->mapcount
== 0)
1426 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_MAPPED
;
1427 mutex_unlock(&sbuf
->cam
->s_mutex
);
1430 static struct vm_operations_struct cafe_v4l_vm_ops
= {
1431 .open
= cafe_v4l_vm_open
,
1432 .close
= cafe_v4l_vm_close
1436 static int cafe_v4l_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
1438 struct cafe_camera
*cam
= filp
->private_data
;
1439 unsigned long offset
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1442 struct cafe_sio_buffer
*sbuf
= NULL
;
1444 if (! (vma
->vm_flags
& VM_WRITE
) || ! (vma
->vm_flags
& VM_SHARED
))
1447 * Find the buffer they are looking for.
1449 mutex_lock(&cam
->s_mutex
);
1450 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1451 if (cam
->sb_bufs
[i
].v4lbuf
.m
.offset
== offset
) {
1452 sbuf
= cam
->sb_bufs
+ i
;
1458 ret
= remap_vmalloc_range(vma
, sbuf
->buffer
, 0);
1461 vma
->vm_flags
|= VM_DONTEXPAND
;
1462 vma
->vm_private_data
= sbuf
;
1463 vma
->vm_ops
= &cafe_v4l_vm_ops
;
1464 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_MAPPED
;
1465 cafe_v4l_vm_open(vma
);
1468 mutex_unlock(&cam
->s_mutex
);
1474 static int cafe_v4l_open(struct inode
*inode
, struct file
*filp
)
1476 struct cafe_camera
*cam
;
1478 cam
= cafe_find_dev(iminor(inode
));
1481 filp
->private_data
= cam
;
1483 mutex_lock(&cam
->s_mutex
);
1484 if (cam
->users
== 0) {
1485 cafe_ctlr_power_up(cam
);
1486 __cafe_cam_reset(cam
);
1487 cafe_set_config_needed(cam
, 1);
1488 /* FIXME make sure this is complete */
1491 mutex_unlock(&cam
->s_mutex
);
1496 static int cafe_v4l_release(struct inode
*inode
, struct file
*filp
)
1498 struct cafe_camera
*cam
= filp
->private_data
;
1500 mutex_lock(&cam
->s_mutex
);
1502 if (filp
== cam
->owner
) {
1503 cafe_ctlr_stop_dma(cam
);
1504 cafe_free_sio_buffers(cam
);
1507 if (cam
->users
== 0) {
1508 cafe_ctlr_power_down(cam
);
1509 if (alloc_bufs_at_read
)
1510 cafe_free_dma_bufs(cam
);
1512 mutex_unlock(&cam
->s_mutex
);
1518 static unsigned int cafe_v4l_poll(struct file
*filp
,
1519 struct poll_table_struct
*pt
)
1521 struct cafe_camera
*cam
= filp
->private_data
;
1523 poll_wait(filp
, &cam
->iowait
, pt
);
1524 if (cam
->next_buf
>= 0)
1525 return POLLIN
| POLLRDNORM
;
1531 static int cafe_vidioc_queryctrl(struct file
*filp
, void *priv
,
1532 struct v4l2_queryctrl
*qc
)
1534 struct cafe_camera
*cam
= filp
->private_data
;
1537 mutex_lock(&cam
->s_mutex
);
1538 ret
= __cafe_cam_cmd(cam
, VIDIOC_QUERYCTRL
, qc
);
1539 mutex_unlock(&cam
->s_mutex
);
1544 static int cafe_vidioc_g_ctrl(struct file
*filp
, void *priv
,
1545 struct v4l2_control
*ctrl
)
1547 struct cafe_camera
*cam
= filp
->private_data
;
1550 mutex_lock(&cam
->s_mutex
);
1551 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_CTRL
, ctrl
);
1552 mutex_unlock(&cam
->s_mutex
);
1557 static int cafe_vidioc_s_ctrl(struct file
*filp
, void *priv
,
1558 struct v4l2_control
*ctrl
)
1560 struct cafe_camera
*cam
= filp
->private_data
;
1563 mutex_lock(&cam
->s_mutex
);
1564 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_CTRL
, ctrl
);
1565 mutex_unlock(&cam
->s_mutex
);
1573 static int cafe_vidioc_querycap(struct file
*file
, void *priv
,
1574 struct v4l2_capability
*cap
)
1576 strcpy(cap
->driver
, "cafe_ccic");
1577 strcpy(cap
->card
, "cafe_ccic");
1578 cap
->version
= CAFE_VERSION
;
1579 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
|
1580 V4L2_CAP_READWRITE
| V4L2_CAP_STREAMING
;
1586 * The default format we use until somebody says otherwise.
1588 static struct v4l2_pix_format cafe_def_pix_format
= {
1590 .height
= VGA_HEIGHT
,
1591 .pixelformat
= V4L2_PIX_FMT_YUYV
,
1592 .field
= V4L2_FIELD_NONE
,
1593 .bytesperline
= VGA_WIDTH
*2,
1594 .sizeimage
= VGA_WIDTH
*VGA_HEIGHT
*2,
1597 static int cafe_vidioc_enum_fmt_vid_cap(struct file
*filp
,
1598 void *priv
, struct v4l2_fmtdesc
*fmt
)
1600 struct cafe_camera
*cam
= priv
;
1603 if (fmt
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1605 mutex_lock(&cam
->s_mutex
);
1606 ret
= __cafe_cam_cmd(cam
, VIDIOC_ENUM_FMT
, fmt
);
1607 mutex_unlock(&cam
->s_mutex
);
1612 static int cafe_vidioc_try_fmt_vid_cap(struct file
*filp
, void *priv
,
1613 struct v4l2_format
*fmt
)
1615 struct cafe_camera
*cam
= priv
;
1618 mutex_lock(&cam
->s_mutex
);
1619 ret
= __cafe_cam_cmd(cam
, VIDIOC_TRY_FMT
, fmt
);
1620 mutex_unlock(&cam
->s_mutex
);
1624 static int cafe_vidioc_s_fmt_vid_cap(struct file
*filp
, void *priv
,
1625 struct v4l2_format
*fmt
)
1627 struct cafe_camera
*cam
= priv
;
1631 * Can't do anything if the device is not idle
1632 * Also can't if there are streaming buffers in place.
1634 if (cam
->state
!= S_IDLE
|| cam
->n_sbufs
> 0)
1637 * See if the formatting works in principle.
1639 ret
= cafe_vidioc_try_fmt_vid_cap(filp
, priv
, fmt
);
1643 * Now we start to change things for real, so let's do it
1646 mutex_lock(&cam
->s_mutex
);
1647 cam
->pix_format
= fmt
->fmt
.pix
;
1649 * Make sure we have appropriate DMA buffers.
1652 if (cam
->nbufs
> 0 && cam
->dma_buf_size
< cam
->pix_format
.sizeimage
)
1653 cafe_free_dma_bufs(cam
);
1654 if (cam
->nbufs
== 0) {
1655 if (cafe_alloc_dma_bufs(cam
, 0))
1659 * It looks like this might work, so let's program the sensor.
1661 ret
= cafe_cam_configure(cam
);
1663 ret
= cafe_ctlr_configure(cam
);
1665 mutex_unlock(&cam
->s_mutex
);
1670 * Return our stored notion of how the camera is/should be configured.
1671 * The V4l2 spec wants us to be smarter, and actually get this from
1672 * the camera (and not mess with it at open time). Someday.
1674 static int cafe_vidioc_g_fmt_vid_cap(struct file
*filp
, void *priv
,
1675 struct v4l2_format
*f
)
1677 struct cafe_camera
*cam
= priv
;
1679 f
->fmt
.pix
= cam
->pix_format
;
1684 * We only have one input - the sensor - so minimize the nonsense here.
1686 static int cafe_vidioc_enum_input(struct file
*filp
, void *priv
,
1687 struct v4l2_input
*input
)
1689 if (input
->index
!= 0)
1692 input
->type
= V4L2_INPUT_TYPE_CAMERA
;
1693 input
->std
= V4L2_STD_ALL
; /* Not sure what should go here */
1694 strcpy(input
->name
, "Camera");
1698 static int cafe_vidioc_g_input(struct file
*filp
, void *priv
, unsigned int *i
)
1704 static int cafe_vidioc_s_input(struct file
*filp
, void *priv
, unsigned int i
)
1712 static int cafe_vidioc_s_std(struct file
*filp
, void *priv
, v4l2_std_id
*a
)
1718 * G/S_PARM. Most of this is done by the sensor, but we are
1719 * the level which controls the number of read buffers.
1721 static int cafe_vidioc_g_parm(struct file
*filp
, void *priv
,
1722 struct v4l2_streamparm
*parms
)
1724 struct cafe_camera
*cam
= priv
;
1727 mutex_lock(&cam
->s_mutex
);
1728 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_PARM
, parms
);
1729 mutex_unlock(&cam
->s_mutex
);
1730 parms
->parm
.capture
.readbuffers
= n_dma_bufs
;
1734 static int cafe_vidioc_s_parm(struct file
*filp
, void *priv
,
1735 struct v4l2_streamparm
*parms
)
1737 struct cafe_camera
*cam
= priv
;
1740 mutex_lock(&cam
->s_mutex
);
1741 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_PARM
, parms
);
1742 mutex_unlock(&cam
->s_mutex
);
1743 parms
->parm
.capture
.readbuffers
= n_dma_bufs
;
1748 static void cafe_v4l_dev_release(struct video_device
*vd
)
1750 struct cafe_camera
*cam
= container_of(vd
, struct cafe_camera
, v4ldev
);
1757 * This template device holds all of those v4l2 methods; we
1758 * clone it for specific real devices.
1761 static const struct file_operations cafe_v4l_fops
= {
1762 .owner
= THIS_MODULE
,
1763 .open
= cafe_v4l_open
,
1764 .release
= cafe_v4l_release
,
1765 .read
= cafe_v4l_read
,
1766 .poll
= cafe_v4l_poll
,
1767 .mmap
= cafe_v4l_mmap
,
1768 .ioctl
= video_ioctl2
,
1769 .llseek
= no_llseek
,
1772 static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops
= {
1773 .vidioc_querycap
= cafe_vidioc_querycap
,
1774 .vidioc_enum_fmt_vid_cap
= cafe_vidioc_enum_fmt_vid_cap
,
1775 .vidioc_try_fmt_vid_cap
= cafe_vidioc_try_fmt_vid_cap
,
1776 .vidioc_s_fmt_vid_cap
= cafe_vidioc_s_fmt_vid_cap
,
1777 .vidioc_g_fmt_vid_cap
= cafe_vidioc_g_fmt_vid_cap
,
1778 .vidioc_enum_input
= cafe_vidioc_enum_input
,
1779 .vidioc_g_input
= cafe_vidioc_g_input
,
1780 .vidioc_s_input
= cafe_vidioc_s_input
,
1781 .vidioc_s_std
= cafe_vidioc_s_std
,
1782 .vidioc_reqbufs
= cafe_vidioc_reqbufs
,
1783 .vidioc_querybuf
= cafe_vidioc_querybuf
,
1784 .vidioc_qbuf
= cafe_vidioc_qbuf
,
1785 .vidioc_dqbuf
= cafe_vidioc_dqbuf
,
1786 .vidioc_streamon
= cafe_vidioc_streamon
,
1787 .vidioc_streamoff
= cafe_vidioc_streamoff
,
1788 .vidioc_queryctrl
= cafe_vidioc_queryctrl
,
1789 .vidioc_g_ctrl
= cafe_vidioc_g_ctrl
,
1790 .vidioc_s_ctrl
= cafe_vidioc_s_ctrl
,
1791 .vidioc_g_parm
= cafe_vidioc_g_parm
,
1792 .vidioc_s_parm
= cafe_vidioc_s_parm
,
1795 static struct video_device cafe_v4l_template
= {
1797 .minor
= -1, /* Get one dynamically */
1798 .tvnorms
= V4L2_STD_NTSC_M
,
1799 .current_norm
= V4L2_STD_NTSC_M
, /* make mplayer happy */
1801 .fops
= &cafe_v4l_fops
,
1802 .ioctl_ops
= &cafe_v4l_ioctl_ops
,
1803 .release
= cafe_v4l_dev_release
,
1812 /* ---------------------------------------------------------------------- */
1814 * Interrupt handler stuff
1819 static void cafe_frame_tasklet(unsigned long data
)
1821 struct cafe_camera
*cam
= (struct cafe_camera
*) data
;
1823 unsigned long flags
;
1824 struct cafe_sio_buffer
*sbuf
;
1826 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1827 for (i
= 0; i
< cam
->nbufs
; i
++) {
1828 int bufno
= cam
->next_buf
;
1829 if (bufno
< 0) { /* "will never happen" */
1830 cam_err(cam
, "No valid bufs in tasklet!\n");
1833 if (++(cam
->next_buf
) >= cam
->nbufs
)
1835 if (! test_bit(bufno
, &cam
->flags
))
1837 if (list_empty(&cam
->sb_avail
))
1838 break; /* Leave it valid, hope for better later */
1839 clear_bit(bufno
, &cam
->flags
);
1840 sbuf
= list_entry(cam
->sb_avail
.next
,
1841 struct cafe_sio_buffer
, list
);
1843 * Drop the lock during the big copy. This *should* be safe...
1845 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1846 memcpy(sbuf
->buffer
, cam
->dma_bufs
[bufno
],
1847 cam
->pix_format
.sizeimage
);
1848 sbuf
->v4lbuf
.bytesused
= cam
->pix_format
.sizeimage
;
1849 sbuf
->v4lbuf
.sequence
= cam
->buf_seq
[bufno
];
1850 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_QUEUED
;
1851 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_DONE
;
1852 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1853 list_move_tail(&sbuf
->list
, &cam
->sb_full
);
1855 if (! list_empty(&cam
->sb_full
))
1856 wake_up(&cam
->iowait
);
1857 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1862 static void cafe_frame_complete(struct cafe_camera
*cam
, int frame
)
1865 * Basic frame housekeeping.
1867 if (test_bit(frame
, &cam
->flags
) && printk_ratelimit())
1868 cam_err(cam
, "Frame overrun on %d, frames lost\n", frame
);
1869 set_bit(frame
, &cam
->flags
);
1870 clear_bit(CF_DMA_ACTIVE
, &cam
->flags
);
1871 if (cam
->next_buf
< 0)
1872 cam
->next_buf
= frame
;
1873 cam
->buf_seq
[frame
] = ++(cam
->sequence
);
1875 switch (cam
->state
) {
1877 * If in single read mode, try going speculative.
1880 cam
->state
= S_SPECREAD
;
1881 cam
->specframes
= 0;
1882 wake_up(&cam
->iowait
);
1886 * If we are already doing speculative reads, and nobody is
1887 * reading them, just stop.
1890 if (++(cam
->specframes
) >= cam
->nbufs
) {
1891 cafe_ctlr_stop(cam
);
1892 cafe_ctlr_irq_disable(cam
);
1893 cam
->state
= S_IDLE
;
1895 wake_up(&cam
->iowait
);
1898 * For the streaming case, we defer the real work to the
1901 * FIXME: if the application is not consuming the buffers,
1902 * we should eventually put things on hold and restart in
1906 tasklet_schedule(&cam
->s_tasklet
);
1910 cam_err(cam
, "Frame interrupt in non-operational state\n");
1918 static void cafe_frame_irq(struct cafe_camera
*cam
, unsigned int irqs
)
1922 cafe_reg_write(cam
, REG_IRQSTAT
, FRAMEIRQS
); /* Clear'em all */
1924 * Handle any frame completions. There really should
1925 * not be more than one of these, or we have fallen
1928 for (frame
= 0; frame
< cam
->nbufs
; frame
++)
1929 if (irqs
& (IRQ_EOF0
<< frame
))
1930 cafe_frame_complete(cam
, frame
);
1932 * If a frame starts, note that we have DMA active. This
1933 * code assumes that we won't get multiple frame interrupts
1934 * at once; may want to rethink that.
1936 if (irqs
& (IRQ_SOF0
| IRQ_SOF1
| IRQ_SOF2
))
1937 set_bit(CF_DMA_ACTIVE
, &cam
->flags
);
1942 static irqreturn_t
cafe_irq(int irq
, void *data
)
1944 struct cafe_camera
*cam
= data
;
1947 spin_lock(&cam
->dev_lock
);
1948 irqs
= cafe_reg_read(cam
, REG_IRQSTAT
);
1949 if ((irqs
& ALLIRQS
) == 0) {
1950 spin_unlock(&cam
->dev_lock
);
1953 if (irqs
& FRAMEIRQS
)
1954 cafe_frame_irq(cam
, irqs
);
1955 if (irqs
& TWSIIRQS
) {
1956 cafe_reg_write(cam
, REG_IRQSTAT
, TWSIIRQS
);
1957 wake_up(&cam
->smbus_wait
);
1959 spin_unlock(&cam
->dev_lock
);
1964 /* -------------------------------------------------------------------------- */
1965 #ifdef CONFIG_VIDEO_ADV_DEBUG
1970 static char cafe_debug_buf
[1024];
1971 static struct dentry
*cafe_dfs_root
;
1973 static void cafe_dfs_setup(void)
1975 cafe_dfs_root
= debugfs_create_dir("cafe_ccic", NULL
);
1976 if (IS_ERR(cafe_dfs_root
)) {
1977 cafe_dfs_root
= NULL
; /* Never mind */
1978 printk(KERN_NOTICE
"cafe_ccic unable to set up debugfs\n");
1982 static void cafe_dfs_shutdown(void)
1985 debugfs_remove(cafe_dfs_root
);
1988 static int cafe_dfs_open(struct inode
*inode
, struct file
*file
)
1990 file
->private_data
= inode
->i_private
;
1994 static ssize_t
cafe_dfs_read_regs(struct file
*file
,
1995 char __user
*buf
, size_t count
, loff_t
*ppos
)
1997 struct cafe_camera
*cam
= file
->private_data
;
1998 char *s
= cafe_debug_buf
;
2001 for (offset
= 0; offset
< 0x44; offset
+= 4)
2002 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2003 cafe_reg_read(cam
, offset
));
2004 for (offset
= 0x88; offset
<= 0x90; offset
+= 4)
2005 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2006 cafe_reg_read(cam
, offset
));
2007 for (offset
= 0xb4; offset
<= 0xbc; offset
+= 4)
2008 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2009 cafe_reg_read(cam
, offset
));
2010 for (offset
= 0x3000; offset
<= 0x300c; offset
+= 4)
2011 s
+= sprintf(s
, "%04x: %08x\n", offset
,
2012 cafe_reg_read(cam
, offset
));
2013 return simple_read_from_buffer(buf
, count
, ppos
, cafe_debug_buf
,
2014 s
- cafe_debug_buf
);
2017 static const struct file_operations cafe_dfs_reg_ops
= {
2018 .owner
= THIS_MODULE
,
2019 .read
= cafe_dfs_read_regs
,
2020 .open
= cafe_dfs_open
2023 static ssize_t
cafe_dfs_read_cam(struct file
*file
,
2024 char __user
*buf
, size_t count
, loff_t
*ppos
)
2026 struct cafe_camera
*cam
= file
->private_data
;
2027 char *s
= cafe_debug_buf
;
2032 for (offset
= 0x0; offset
< 0x8a; offset
++)
2036 cafe_smbus_read_data(cam
, cam
->sensor
->addr
, offset
, &v
);
2037 s
+= sprintf(s
, "%02x: %02x\n", offset
, v
);
2039 return simple_read_from_buffer(buf
, count
, ppos
, cafe_debug_buf
,
2040 s
- cafe_debug_buf
);
2043 static const struct file_operations cafe_dfs_cam_ops
= {
2044 .owner
= THIS_MODULE
,
2045 .read
= cafe_dfs_read_cam
,
2046 .open
= cafe_dfs_open
2051 static void cafe_dfs_cam_setup(struct cafe_camera
*cam
)
2057 sprintf(fname
, "regs-%d", cam
->v4ldev
.minor
);
2058 cam
->dfs_regs
= debugfs_create_file(fname
, 0444, cafe_dfs_root
,
2059 cam
, &cafe_dfs_reg_ops
);
2060 sprintf(fname
, "cam-%d", cam
->v4ldev
.minor
);
2061 cam
->dfs_cam_regs
= debugfs_create_file(fname
, 0444, cafe_dfs_root
,
2062 cam
, &cafe_dfs_cam_ops
);
2066 static void cafe_dfs_cam_shutdown(struct cafe_camera
*cam
)
2068 if (! IS_ERR(cam
->dfs_regs
))
2069 debugfs_remove(cam
->dfs_regs
);
2070 if (! IS_ERR(cam
->dfs_cam_regs
))
2071 debugfs_remove(cam
->dfs_cam_regs
);
2076 #define cafe_dfs_setup()
2077 #define cafe_dfs_shutdown()
2078 #define cafe_dfs_cam_setup(cam)
2079 #define cafe_dfs_cam_shutdown(cam)
2080 #endif /* CONFIG_VIDEO_ADV_DEBUG */
2085 /* ------------------------------------------------------------------------*/
2087 * PCI interface stuff.
2090 static int cafe_pci_probe(struct pci_dev
*pdev
,
2091 const struct pci_device_id
*id
)
2095 struct cafe_camera
*cam
;
2097 * Make sure we have a camera here - we'll get calls for
2098 * the other cafe devices as well.
2100 pci_read_config_word(pdev
, PCI_CLASS_DEVICE
, &classword
);
2101 if (classword
!= PCI_CLASS_MULTIMEDIA_VIDEO
)
2104 * Start putting together one of our big camera structures.
2107 cam
= kzalloc(sizeof(struct cafe_camera
), GFP_KERNEL
);
2110 mutex_init(&cam
->s_mutex
);
2111 mutex_lock(&cam
->s_mutex
);
2112 spin_lock_init(&cam
->dev_lock
);
2113 cam
->state
= S_NOTREADY
;
2114 cafe_set_config_needed(cam
, 1);
2115 init_waitqueue_head(&cam
->smbus_wait
);
2116 init_waitqueue_head(&cam
->iowait
);
2118 cam
->pix_format
= cafe_def_pix_format
;
2119 INIT_LIST_HEAD(&cam
->dev_list
);
2120 INIT_LIST_HEAD(&cam
->sb_avail
);
2121 INIT_LIST_HEAD(&cam
->sb_full
);
2122 tasklet_init(&cam
->s_tasklet
, cafe_frame_tasklet
, (unsigned long) cam
);
2124 * Get set up on the PCI bus.
2126 ret
= pci_enable_device(pdev
);
2129 pci_set_master(pdev
);
2132 cam
->regs
= pci_iomap(pdev
, 0, 0);
2134 printk(KERN_ERR
"Unable to ioremap cafe-ccic regs\n");
2137 ret
= request_irq(pdev
->irq
, cafe_irq
, IRQF_SHARED
, "cafe-ccic", cam
);
2141 * Initialize the controller and leave it powered up. It will
2142 * stay that way until the sensor driver shows up.
2144 cafe_ctlr_init(cam
);
2145 cafe_ctlr_power_up(cam
);
2147 * Set up I2C/SMBUS communications. We have to drop the mutex here
2148 * because the sensor could attach in this call chain, leading to
2149 * unsightly deadlocks.
2151 mutex_unlock(&cam
->s_mutex
); /* attach can deadlock */
2152 ret
= cafe_smbus_setup(cam
);
2156 * Get the v4l2 setup done.
2158 mutex_lock(&cam
->s_mutex
);
2159 cam
->v4ldev
= cafe_v4l_template
;
2160 cam
->v4ldev
.debug
= 0;
2161 // cam->v4ldev.debug = V4L2_DEBUG_IOCTL_ARG;
2162 cam
->v4ldev
.parent
= &pdev
->dev
;
2163 ret
= video_register_device(&cam
->v4ldev
, VFL_TYPE_GRABBER
, -1);
2167 * If so requested, try to get our DMA buffers now.
2169 if (!alloc_bufs_at_read
) {
2170 if (cafe_alloc_dma_bufs(cam
, 1))
2171 cam_warn(cam
, "Unable to alloc DMA buffers at load"
2172 " will try again later.");
2175 cafe_dfs_cam_setup(cam
);
2176 mutex_unlock(&cam
->s_mutex
);
2181 cafe_smbus_shutdown(cam
);
2183 cafe_ctlr_power_down(cam
);
2184 free_irq(pdev
->irq
, cam
);
2186 pci_iounmap(pdev
, cam
->regs
);
2195 * Shut down an initialized device
2197 static void cafe_shutdown(struct cafe_camera
*cam
)
2199 /* FIXME: Make sure we take care of everything here */
2200 cafe_dfs_cam_shutdown(cam
);
2201 if (cam
->n_sbufs
> 0)
2202 /* What if they are still mapped? Shouldn't be, but... */
2203 cafe_free_sio_buffers(cam
);
2204 cafe_remove_dev(cam
);
2205 cafe_ctlr_stop_dma(cam
);
2206 cafe_ctlr_power_down(cam
);
2207 cafe_smbus_shutdown(cam
);
2208 cafe_free_dma_bufs(cam
);
2209 free_irq(cam
->pdev
->irq
, cam
);
2210 pci_iounmap(cam
->pdev
, cam
->regs
);
2211 video_unregister_device(&cam
->v4ldev
);
2212 /* kfree(cam); done in v4l_release () */
2216 static void cafe_pci_remove(struct pci_dev
*pdev
)
2218 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2221 printk(KERN_WARNING
"pci_remove on unknown pdev %p\n", pdev
);
2224 mutex_lock(&cam
->s_mutex
);
2226 cam_warn(cam
, "Removing a device with users!\n");
2228 /* No unlock - it no longer exists */
2234 * Basic power management.
2236 static int cafe_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2238 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2240 enum cafe_state cstate
;
2242 ret
= pci_save_state(pdev
);
2245 cstate
= cam
->state
; /* HACK - stop_dma sets to idle */
2246 cafe_ctlr_stop_dma(cam
);
2247 cafe_ctlr_power_down(cam
);
2248 pci_disable_device(pdev
);
2249 cam
->state
= cstate
;
2254 static int cafe_pci_resume(struct pci_dev
*pdev
)
2256 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2259 ret
= pci_restore_state(pdev
);
2262 ret
= pci_enable_device(pdev
);
2265 cam_warn(cam
, "Unable to re-enable device on resume!\n");
2268 cafe_ctlr_init(cam
);
2269 cafe_ctlr_power_down(cam
);
2271 mutex_lock(&cam
->s_mutex
);
2272 if (cam
->users
> 0) {
2273 cafe_ctlr_power_up(cam
);
2274 __cafe_cam_reset(cam
);
2276 mutex_unlock(&cam
->s_mutex
);
2278 set_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
2279 if (cam
->state
== S_SPECREAD
)
2280 cam
->state
= S_IDLE
; /* Don't bother restarting */
2281 else if (cam
->state
== S_SINGLEREAD
|| cam
->state
== S_STREAMING
)
2282 ret
= cafe_read_setup(cam
, cam
->state
);
2286 #endif /* CONFIG_PM */
2289 static struct pci_device_id cafe_ids
[] = {
2290 { PCI_DEVICE(0x11ab, 0x4100) }, /* Eventual real ID */
2291 { PCI_DEVICE(0x11ab, 0x4102) }, /* Really eventual real ID */
2295 MODULE_DEVICE_TABLE(pci
, cafe_ids
);
2297 static struct pci_driver cafe_pci_driver
= {
2298 .name
= "cafe1000-ccic",
2299 .id_table
= cafe_ids
,
2300 .probe
= cafe_pci_probe
,
2301 .remove
= cafe_pci_remove
,
2303 .suspend
= cafe_pci_suspend
,
2304 .resume
= cafe_pci_resume
,
2311 static int __init
cafe_init(void)
2315 printk(KERN_NOTICE
"Marvell M88ALP01 'CAFE' Camera Controller version %d\n",
2318 ret
= pci_register_driver(&cafe_pci_driver
);
2320 printk(KERN_ERR
"Unable to register cafe_ccic driver\n");
2323 request_module("ov7670"); /* FIXME want something more general */
2331 static void __exit
cafe_exit(void)
2333 pci_unregister_driver(&cafe_pci_driver
);
2334 cafe_dfs_shutdown();
2337 module_init(cafe_init
);
2338 module_exit(cafe_exit
);