2 * A driver for the CMOS camera controller in the Marvell 88ALP01 "cafe"
3 * multifunction chip. Currently works with the Omnivision OV7670
6 * Copyright 2006 One Laptop Per Child Association, Inc.
7 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
9 * Written by Jonathan Corbet, corbet@lwn.net.
11 * This file may be distributed under the terms of the GNU General
12 * Public License, version 2.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
19 #include <linux/pci.h>
20 #include <linux/i2c.h>
21 #include <linux/interrupt.h>
22 #include <linux/spinlock.h>
23 #include <linux/videodev2.h>
24 #include <media/v4l2-common.h>
25 #include <media/v4l2-chip-ident.h>
26 #include <linux/device.h>
27 #include <linux/wait.h>
28 #include <linux/list.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/delay.h>
31 #include <linux/debugfs.h>
32 #include <linux/jiffies.h>
33 #include <linux/vmalloc.h>
35 #include <asm/uaccess.h>
38 #include "cafe_ccic-regs.h"
40 #define CAFE_VERSION 0x000002
46 MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>");
47 MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver");
48 MODULE_LICENSE("GPL");
49 MODULE_SUPPORTED_DEVICE("Video");
52 * Internal DMA buffer management. Since the controller cannot do S/G I/O,
53 * we must have physically contiguous buffers to bring frames into.
54 * These parameters control how many buffers we use, whether we
55 * allocate them at load time (better chance of success, but nails down
56 * memory) or when somebody tries to use the camera (riskier), and,
57 * for load-time allocation, how big they should be.
59 * The controller can cycle through three buffers. We could use
60 * more by flipping pointers around, but it probably makes little
64 #define MAX_DMA_BUFS 3
65 static int alloc_bufs_at_read
= 0;
66 module_param(alloc_bufs_at_read
, bool, 0444);
67 MODULE_PARM_DESC(alloc_bufs_at_read
,
68 "Non-zero value causes DMA buffers to be allocated when the "
69 "video capture device is read, rather than at module load "
70 "time. This saves memory, but decreases the chances of "
71 "successfully getting those buffers.");
73 static int n_dma_bufs
= 3;
74 module_param(n_dma_bufs
, uint
, 0644);
75 MODULE_PARM_DESC(n_dma_bufs
,
76 "The number of DMA buffers to allocate. Can be either two "
77 "(saves memory, makes timing tighter) or three.");
79 static int dma_buf_size
= VGA_WIDTH
* VGA_HEIGHT
* 2; /* Worst case */
80 module_param(dma_buf_size
, uint
, 0444);
81 MODULE_PARM_DESC(dma_buf_size
,
82 "The size of the allocated DMA buffers. If actual operating "
83 "parameters require larger buffers, an attempt to reallocate "
86 static int min_buffers
= 1;
87 module_param(min_buffers
, uint
, 0644);
88 MODULE_PARM_DESC(min_buffers
,
89 "The minimum number of streaming I/O buffers we are willing "
92 static int max_buffers
= 10;
93 module_param(max_buffers
, uint
, 0644);
94 MODULE_PARM_DESC(max_buffers
,
95 "The maximum number of streaming I/O buffers an application "
96 "will be allowed to allocate. These buffers are big and live "
100 module_param(flip
, bool, 0444);
101 MODULE_PARM_DESC(flip
,
102 "If set, the sensor will be instructed to flip the image "
107 S_NOTREADY
, /* Not yet initialized */
108 S_IDLE
, /* Just hanging around */
109 S_FLAKED
, /* Some sort of problem */
110 S_SINGLEREAD
, /* In read() */
111 S_SPECREAD
, /* Speculative read (for future read()) */
112 S_STREAMING
/* Streaming data */
116 * Tracking of streaming I/O buffers.
118 struct cafe_sio_buffer
{
119 struct list_head list
;
120 struct v4l2_buffer v4lbuf
;
121 char *buffer
; /* Where it lives in kernel space */
123 struct cafe_camera
*cam
;
127 * A description of one of our devices.
128 * Locking: controlled by s_mutex. Certain fields, however, require
129 * the dev_lock spinlock; they are marked as such by comments.
130 * dev_lock is also required for access to device registers.
134 enum cafe_state state
;
135 unsigned long flags
; /* Buffer status, mainly (dev_lock) */
136 int users
; /* How many open FDs */
137 struct file
*owner
; /* Who has data access (v4l2) */
140 * Subsystem structures.
142 struct pci_dev
*pdev
;
143 struct video_device v4ldev
;
144 struct i2c_adapter i2c_adapter
;
145 struct i2c_client
*sensor
;
147 unsigned char __iomem
*regs
;
148 struct list_head dev_list
; /* link to other devices */
151 unsigned int nbufs
; /* How many are alloc'd */
152 int next_buf
; /* Next to consume (dev_lock) */
153 unsigned int dma_buf_size
; /* allocated size */
154 void *dma_bufs
[MAX_DMA_BUFS
]; /* Internal buffer addresses */
155 dma_addr_t dma_handles
[MAX_DMA_BUFS
]; /* Buffer bus addresses */
156 unsigned int specframes
; /* Unconsumed spec frames (dev_lock) */
157 unsigned int sequence
; /* Frame sequence number */
158 unsigned int buf_seq
[MAX_DMA_BUFS
]; /* Sequence for individual buffers */
160 /* Streaming buffers */
161 unsigned int n_sbufs
; /* How many we have */
162 struct cafe_sio_buffer
*sb_bufs
; /* The array of housekeeping structs */
163 struct list_head sb_avail
; /* Available for data (we own) (dev_lock) */
164 struct list_head sb_full
; /* With data (user space owns) (dev_lock) */
165 struct tasklet_struct s_tasklet
;
167 /* Current operating parameters */
168 u32 sensor_type
; /* Currently ov7670 only */
169 struct v4l2_pix_format pix_format
;
172 struct mutex s_mutex
; /* Access to this structure */
173 spinlock_t dev_lock
; /* Access to device */
176 wait_queue_head_t smbus_wait
; /* Waiting on i2c events */
177 wait_queue_head_t iowait
; /* Waiting on frame data */
178 #ifdef CONFIG_VIDEO_ADV_DEBUG
179 struct dentry
*dfs_regs
;
180 struct dentry
*dfs_cam_regs
;
185 * Status flags. Always manipulated with bit operations.
187 #define CF_BUF0_VALID 0 /* Buffers valid - first three */
188 #define CF_BUF1_VALID 1
189 #define CF_BUF2_VALID 2
190 #define CF_DMA_ACTIVE 3 /* A frame is incoming */
191 #define CF_CONFIG_NEEDED 4 /* Must configure hardware */
196 * Start over with DMA buffers - dev_lock needed.
198 static void cafe_reset_buffers(struct cafe_camera
*cam
)
203 for (i
= 0; i
< cam
->nbufs
; i
++)
204 clear_bit(i
, &cam
->flags
);
208 static inline int cafe_needs_config(struct cafe_camera
*cam
)
210 return test_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
213 static void cafe_set_config_needed(struct cafe_camera
*cam
, int needed
)
216 set_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
218 clear_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
225 * Debugging and related.
227 #define cam_err(cam, fmt, arg...) \
228 dev_err(&(cam)->pdev->dev, fmt, ##arg);
229 #define cam_warn(cam, fmt, arg...) \
230 dev_warn(&(cam)->pdev->dev, fmt, ##arg);
231 #define cam_dbg(cam, fmt, arg...) \
232 dev_dbg(&(cam)->pdev->dev, fmt, ##arg);
235 /* ---------------------------------------------------------------------*/
237 * We keep a simple list of known devices to search at open time.
239 static LIST_HEAD(cafe_dev_list
);
240 static DEFINE_MUTEX(cafe_dev_list_lock
);
242 static void cafe_add_dev(struct cafe_camera
*cam
)
244 mutex_lock(&cafe_dev_list_lock
);
245 list_add_tail(&cam
->dev_list
, &cafe_dev_list
);
246 mutex_unlock(&cafe_dev_list_lock
);
249 static void cafe_remove_dev(struct cafe_camera
*cam
)
251 mutex_lock(&cafe_dev_list_lock
);
252 list_del(&cam
->dev_list
);
253 mutex_unlock(&cafe_dev_list_lock
);
256 static struct cafe_camera
*cafe_find_dev(int minor
)
258 struct cafe_camera
*cam
;
260 mutex_lock(&cafe_dev_list_lock
);
261 list_for_each_entry(cam
, &cafe_dev_list
, dev_list
) {
262 if (cam
->v4ldev
.minor
== minor
)
267 mutex_unlock(&cafe_dev_list_lock
);
272 static struct cafe_camera
*cafe_find_by_pdev(struct pci_dev
*pdev
)
274 struct cafe_camera
*cam
;
276 mutex_lock(&cafe_dev_list_lock
);
277 list_for_each_entry(cam
, &cafe_dev_list
, dev_list
) {
278 if (cam
->pdev
== pdev
)
283 mutex_unlock(&cafe_dev_list_lock
);
288 /* ------------------------------------------------------------------------ */
290 * Device register I/O
292 static inline void cafe_reg_write(struct cafe_camera
*cam
, unsigned int reg
,
295 iowrite32(val
, cam
->regs
+ reg
);
298 static inline unsigned int cafe_reg_read(struct cafe_camera
*cam
,
301 return ioread32(cam
->regs
+ reg
);
305 static inline void cafe_reg_write_mask(struct cafe_camera
*cam
, unsigned int reg
,
306 unsigned int val
, unsigned int mask
)
308 unsigned int v
= cafe_reg_read(cam
, reg
);
310 v
= (v
& ~mask
) | (val
& mask
);
311 cafe_reg_write(cam
, reg
, v
);
314 static inline void cafe_reg_clear_bit(struct cafe_camera
*cam
,
315 unsigned int reg
, unsigned int val
)
317 cafe_reg_write_mask(cam
, reg
, 0, val
);
320 static inline void cafe_reg_set_bit(struct cafe_camera
*cam
,
321 unsigned int reg
, unsigned int val
)
323 cafe_reg_write_mask(cam
, reg
, val
, val
);
328 /* -------------------------------------------------------------------- */
330 * The I2C/SMBUS interface to the camera itself starts here. The
331 * controller handles SMBUS itself, presenting a relatively simple register
332 * interface; all we have to do is to tell it where to route the data.
334 #define CAFE_SMBUS_TIMEOUT (HZ) /* generous */
336 static int cafe_smbus_write_done(struct cafe_camera
*cam
)
342 * We must delay after the interrupt, or the controller gets confused
343 * and never does give us good status. Fortunately, we don't do this
347 spin_lock_irqsave(&cam
->dev_lock
, flags
);
348 c1
= cafe_reg_read(cam
, REG_TWSIC1
);
349 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
350 return (c1
& (TWSIC1_WSTAT
|TWSIC1_ERROR
)) != TWSIC1_WSTAT
;
353 static int cafe_smbus_write_data(struct cafe_camera
*cam
,
354 u16 addr
, u8 command
, u8 value
)
358 DEFINE_WAIT(the_wait
);
360 spin_lock_irqsave(&cam
->dev_lock
, flags
);
361 rval
= TWSIC0_EN
| ((addr
<< TWSIC0_SID_SHIFT
) & TWSIC0_SID
);
362 rval
|= TWSIC0_OVMAGIC
; /* Make OV sensors work */
364 * Marvell sez set clkdiv to all 1's for now.
366 rval
|= TWSIC0_CLKDIV
;
367 cafe_reg_write(cam
, REG_TWSIC0
, rval
);
368 (void) cafe_reg_read(cam
, REG_TWSIC1
); /* force write */
369 rval
= value
| ((command
<< TWSIC1_ADDR_SHIFT
) & TWSIC1_ADDR
);
370 cafe_reg_write(cam
, REG_TWSIC1
, rval
);
371 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
374 * Time to wait for the write to complete. THIS IS A RACY
375 * WAY TO DO IT, but the sad fact is that reading the TWSIC1
376 * register too quickly after starting the operation sends
377 * the device into a place that may be kinder and better, but
378 * which is absolutely useless for controlling the sensor. In
379 * practice we have plenty of time to get into our sleep state
380 * before the interrupt hits, and the worst case is that we
381 * time out and then see that things completed, so this seems
382 * the best way for now.
385 prepare_to_wait(&cam
->smbus_wait
, &the_wait
,
386 TASK_UNINTERRUPTIBLE
);
387 schedule_timeout(1); /* even 1 jiffy is too long */
388 finish_wait(&cam
->smbus_wait
, &the_wait
);
389 } while (!cafe_smbus_write_done(cam
));
391 #ifdef IF_THE_CAFE_HARDWARE_WORKED_RIGHT
392 wait_event_timeout(cam
->smbus_wait
, cafe_smbus_write_done(cam
),
395 spin_lock_irqsave(&cam
->dev_lock
, flags
);
396 rval
= cafe_reg_read(cam
, REG_TWSIC1
);
397 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
399 if (rval
& TWSIC1_WSTAT
) {
400 cam_err(cam
, "SMBUS write (%02x/%02x/%02x) timed out\n", addr
,
404 if (rval
& TWSIC1_ERROR
) {
405 cam_err(cam
, "SMBUS write (%02x/%02x/%02x) error\n", addr
,
414 static int cafe_smbus_read_done(struct cafe_camera
*cam
)
420 * We must delay after the interrupt, or the controller gets confused
421 * and never does give us good status. Fortunately, we don't do this
425 spin_lock_irqsave(&cam
->dev_lock
, flags
);
426 c1
= cafe_reg_read(cam
, REG_TWSIC1
);
427 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
428 return c1
& (TWSIC1_RVALID
|TWSIC1_ERROR
);
433 static int cafe_smbus_read_data(struct cafe_camera
*cam
,
434 u16 addr
, u8 command
, u8
*value
)
439 spin_lock_irqsave(&cam
->dev_lock
, flags
);
440 rval
= TWSIC0_EN
| ((addr
<< TWSIC0_SID_SHIFT
) & TWSIC0_SID
);
441 rval
|= TWSIC0_OVMAGIC
; /* Make OV sensors work */
443 * Marvel sez set clkdiv to all 1's for now.
445 rval
|= TWSIC0_CLKDIV
;
446 cafe_reg_write(cam
, REG_TWSIC0
, rval
);
447 (void) cafe_reg_read(cam
, REG_TWSIC1
); /* force write */
448 rval
= TWSIC1_READ
| ((command
<< TWSIC1_ADDR_SHIFT
) & TWSIC1_ADDR
);
449 cafe_reg_write(cam
, REG_TWSIC1
, rval
);
450 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
452 wait_event_timeout(cam
->smbus_wait
,
453 cafe_smbus_read_done(cam
), CAFE_SMBUS_TIMEOUT
);
454 spin_lock_irqsave(&cam
->dev_lock
, flags
);
455 rval
= cafe_reg_read(cam
, REG_TWSIC1
);
456 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
458 if (rval
& TWSIC1_ERROR
) {
459 cam_err(cam
, "SMBUS read (%02x/%02x) error\n", addr
, command
);
462 if (! (rval
& TWSIC1_RVALID
)) {
463 cam_err(cam
, "SMBUS read (%02x/%02x) timed out\n", addr
,
467 *value
= rval
& 0xff;
472 * Perform a transfer over SMBUS. This thing is called under
473 * the i2c bus lock, so we shouldn't race with ourselves...
475 static int cafe_smbus_xfer(struct i2c_adapter
*adapter
, u16 addr
,
476 unsigned short flags
, char rw
, u8 command
,
477 int size
, union i2c_smbus_data
*data
)
479 struct cafe_camera
*cam
= i2c_get_adapdata(adapter
);
483 * Refuse to talk to anything but OV cam chips. We should
484 * never even see an attempt to do so, but one never knows.
486 if (cam
->sensor
&& addr
!= cam
->sensor
->addr
) {
487 cam_err(cam
, "funky smbus addr %d\n", addr
);
491 * This interface would appear to only do byte data ops. OK
492 * it can do word too, but the cam chip has no use for that.
494 if (size
!= I2C_SMBUS_BYTE_DATA
) {
495 cam_err(cam
, "funky xfer size %d\n", size
);
499 if (rw
== I2C_SMBUS_WRITE
)
500 ret
= cafe_smbus_write_data(cam
, addr
, command
, data
->byte
);
501 else if (rw
== I2C_SMBUS_READ
)
502 ret
= cafe_smbus_read_data(cam
, addr
, command
, &data
->byte
);
507 static void cafe_smbus_enable_irq(struct cafe_camera
*cam
)
511 spin_lock_irqsave(&cam
->dev_lock
, flags
);
512 cafe_reg_set_bit(cam
, REG_IRQMASK
, TWSIIRQS
);
513 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
516 static u32
cafe_smbus_func(struct i2c_adapter
*adapter
)
518 return I2C_FUNC_SMBUS_READ_BYTE_DATA
|
519 I2C_FUNC_SMBUS_WRITE_BYTE_DATA
;
522 static struct i2c_algorithm cafe_smbus_algo
= {
523 .smbus_xfer
= cafe_smbus_xfer
,
524 .functionality
= cafe_smbus_func
527 /* Somebody is on the bus */
528 static int cafe_cam_init(struct cafe_camera
*cam
);
529 static void cafe_ctlr_stop_dma(struct cafe_camera
*cam
);
530 static void cafe_ctlr_power_down(struct cafe_camera
*cam
);
532 static int cafe_smbus_attach(struct i2c_client
*client
)
534 struct cafe_camera
*cam
= i2c_get_adapdata(client
->adapter
);
537 * Don't talk to chips we don't recognize.
539 if (client
->driver
->id
== I2C_DRIVERID_OV7670
) {
540 cam
->sensor
= client
;
541 return cafe_cam_init(cam
);
546 static int cafe_smbus_detach(struct i2c_client
*client
)
548 struct cafe_camera
*cam
= i2c_get_adapdata(client
->adapter
);
550 if (cam
->sensor
== client
) {
551 cafe_ctlr_stop_dma(cam
);
552 cafe_ctlr_power_down(cam
);
553 cam_err(cam
, "lost the sensor!\n");
554 cam
->sensor
= NULL
; /* Bummer, no camera */
555 cam
->state
= S_NOTREADY
;
560 static int cafe_smbus_setup(struct cafe_camera
*cam
)
562 struct i2c_adapter
*adap
= &cam
->i2c_adapter
;
565 cafe_smbus_enable_irq(cam
);
566 adap
->id
= I2C_HW_SMBUS_CAFE
;
567 adap
->class = I2C_CLASS_CAM_DIGITAL
;
568 adap
->owner
= THIS_MODULE
;
569 adap
->client_register
= cafe_smbus_attach
;
570 adap
->client_unregister
= cafe_smbus_detach
;
571 adap
->algo
= &cafe_smbus_algo
;
572 strcpy(adap
->name
, "cafe_ccic");
573 adap
->dev
.parent
= &cam
->pdev
->dev
;
574 i2c_set_adapdata(adap
, cam
);
575 ret
= i2c_add_adapter(adap
);
577 printk(KERN_ERR
"Unable to register cafe i2c adapter\n");
581 static void cafe_smbus_shutdown(struct cafe_camera
*cam
)
583 i2c_del_adapter(&cam
->i2c_adapter
);
587 /* ------------------------------------------------------------------- */
589 * Deal with the controller.
593 * Do everything we think we need to have the interface operating
594 * according to the desired format.
596 static void cafe_ctlr_dma(struct cafe_camera
*cam
)
599 * Store the first two Y buffers (we aren't supporting
600 * planar formats for now, so no UV bufs). Then either
601 * set the third if it exists, or tell the controller
604 cafe_reg_write(cam
, REG_Y0BAR
, cam
->dma_handles
[0]);
605 cafe_reg_write(cam
, REG_Y1BAR
, cam
->dma_handles
[1]);
606 if (cam
->nbufs
> 2) {
607 cafe_reg_write(cam
, REG_Y2BAR
, cam
->dma_handles
[2]);
608 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_TWOBUFS
);
611 cafe_reg_set_bit(cam
, REG_CTRL1
, C1_TWOBUFS
);
612 cafe_reg_write(cam
, REG_UBAR
, 0); /* 32 bits only for now */
615 static void cafe_ctlr_image(struct cafe_camera
*cam
)
618 struct v4l2_pix_format
*fmt
= &cam
->pix_format
;
620 imgsz
= ((fmt
->height
<< IMGSZ_V_SHIFT
) & IMGSZ_V_MASK
) |
621 (fmt
->bytesperline
& IMGSZ_H_MASK
);
622 cafe_reg_write(cam
, REG_IMGSIZE
, imgsz
);
623 cafe_reg_write(cam
, REG_IMGOFFSET
, 0);
624 /* YPITCH just drops the last two bits */
625 cafe_reg_write_mask(cam
, REG_IMGPITCH
, fmt
->bytesperline
,
628 * Tell the controller about the image format we are using.
630 switch (cam
->pix_format
.pixelformat
) {
631 case V4L2_PIX_FMT_YUYV
:
632 cafe_reg_write_mask(cam
, REG_CTRL0
,
633 C0_DF_YUV
|C0_YUV_PACKED
|C0_YUVE_YUYV
,
637 case V4L2_PIX_FMT_RGB444
:
638 cafe_reg_write_mask(cam
, REG_CTRL0
,
639 C0_DF_RGB
|C0_RGBF_444
|C0_RGB4_XRGB
,
644 case V4L2_PIX_FMT_RGB565
:
645 cafe_reg_write_mask(cam
, REG_CTRL0
,
646 C0_DF_RGB
|C0_RGBF_565
|C0_RGB5_BGGR
,
651 cam_err(cam
, "Unknown format %x\n", cam
->pix_format
.pixelformat
);
655 * Make sure it knows we want to use hsync/vsync.
657 cafe_reg_write_mask(cam
, REG_CTRL0
, C0_SIF_HVSYNC
,
663 * Configure the controller for operation; caller holds the
666 static int cafe_ctlr_configure(struct cafe_camera
*cam
)
670 spin_lock_irqsave(&cam
->dev_lock
, flags
);
672 cafe_ctlr_image(cam
);
673 cafe_set_config_needed(cam
, 0);
674 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
678 static void cafe_ctlr_irq_enable(struct cafe_camera
*cam
)
681 * Clear any pending interrupts, since we do not
682 * expect to have I/O active prior to enabling.
684 cafe_reg_write(cam
, REG_IRQSTAT
, FRAMEIRQS
);
685 cafe_reg_set_bit(cam
, REG_IRQMASK
, FRAMEIRQS
);
688 static void cafe_ctlr_irq_disable(struct cafe_camera
*cam
)
690 cafe_reg_clear_bit(cam
, REG_IRQMASK
, FRAMEIRQS
);
694 * Make the controller start grabbing images. Everything must
695 * be set up before doing this.
697 static void cafe_ctlr_start(struct cafe_camera
*cam
)
699 /* set_bit performs a read, so no other barrier should be
701 cafe_reg_set_bit(cam
, REG_CTRL0
, C0_ENABLE
);
704 static void cafe_ctlr_stop(struct cafe_camera
*cam
)
706 cafe_reg_clear_bit(cam
, REG_CTRL0
, C0_ENABLE
);
709 static void cafe_ctlr_init(struct cafe_camera
*cam
)
713 spin_lock_irqsave(&cam
->dev_lock
, flags
);
715 * Added magic to bring up the hardware on the B-Test board
717 cafe_reg_write(cam
, 0x3038, 0x8);
718 cafe_reg_write(cam
, 0x315c, 0x80008);
720 * Go through the dance needed to wake the device up.
721 * Note that these registers are global and shared
722 * with the NAND and SD devices. Interaction between the
723 * three still needs to be examined.
725 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRS
|GCSR_MRS
); /* Needed? */
726 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRC
|GCSR_MRC
);
727 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRC
|GCSR_MRS
);
729 * Here we must wait a bit for the controller to come around.
731 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
733 spin_lock_irqsave(&cam
->dev_lock
, flags
);
735 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_CCIC_EN
|GCSR_SRC
|GCSR_MRC
);
736 cafe_reg_set_bit(cam
, REG_GL_IMASK
, GIMSK_CCIC_EN
);
738 * Make sure it's not powered down.
740 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
742 * Turn off the enable bit. It sure should be off anyway,
743 * but it's good to be sure.
745 cafe_reg_clear_bit(cam
, REG_CTRL0
, C0_ENABLE
);
747 * Mask all interrupts.
749 cafe_reg_write(cam
, REG_IRQMASK
, 0);
751 * Clock the sensor appropriately. Controller clock should
752 * be 48MHz, sensor "typical" value is half that.
754 cafe_reg_write_mask(cam
, REG_CLKCTRL
, 2, CLK_DIV_MASK
);
755 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
760 * Stop the controller, and don't return until we're really sure that no
761 * further DMA is going on.
763 static void cafe_ctlr_stop_dma(struct cafe_camera
*cam
)
768 * Theory: stop the camera controller (whether it is operating
769 * or not). Delay briefly just in case we race with the SOF
770 * interrupt, then wait until no DMA is active.
772 spin_lock_irqsave(&cam
->dev_lock
, flags
);
774 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
776 wait_event_timeout(cam
->iowait
,
777 !test_bit(CF_DMA_ACTIVE
, &cam
->flags
), HZ
);
778 if (test_bit(CF_DMA_ACTIVE
, &cam
->flags
))
779 cam_err(cam
, "Timeout waiting for DMA to end\n");
780 /* This would be bad news - what now? */
781 spin_lock_irqsave(&cam
->dev_lock
, flags
);
783 cafe_ctlr_irq_disable(cam
);
784 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
790 static void cafe_ctlr_power_up(struct cafe_camera
*cam
)
794 spin_lock_irqsave(&cam
->dev_lock
, flags
);
795 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
797 * Part one of the sensor dance: turn the global
800 cafe_reg_write(cam
, REG_GL_FCR
, GFCR_GPIO_ON
);
801 cafe_reg_write(cam
, REG_GL_GPIOR
, GGPIO_OUT
|GGPIO_VAL
);
803 * Put the sensor into operational mode (assumes OLPC-style
804 * wiring). Control 0 is reset - set to 1 to operate.
805 * Control 1 is power down, set to 0 to operate.
807 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
); /* pwr up, reset */
808 // mdelay(1); /* Marvell says 1ms will do it */
809 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
|GPR_C0
);
810 // mdelay(1); /* Enough? */
811 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
812 msleep(5); /* Just to be sure */
815 static void cafe_ctlr_power_down(struct cafe_camera
*cam
)
819 spin_lock_irqsave(&cam
->dev_lock
, flags
);
820 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
|GPR_C1
);
821 cafe_reg_write(cam
, REG_GL_FCR
, GFCR_GPIO_ON
);
822 cafe_reg_write(cam
, REG_GL_GPIOR
, GGPIO_OUT
);
823 cafe_reg_set_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
824 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
827 /* -------------------------------------------------------------------- */
829 * Communications with the sensor.
832 static int __cafe_cam_cmd(struct cafe_camera
*cam
, int cmd
, void *arg
)
834 struct i2c_client
*sc
= cam
->sensor
;
837 if (sc
== NULL
|| sc
->driver
== NULL
|| sc
->driver
->command
== NULL
)
839 ret
= sc
->driver
->command(sc
, cmd
, arg
);
840 if (ret
== -EPERM
) /* Unsupported command */
845 static int __cafe_cam_reset(struct cafe_camera
*cam
)
848 return __cafe_cam_cmd(cam
, VIDIOC_INT_RESET
, &zero
);
852 * We have found the sensor on the i2c. Let's try to have a
855 static int cafe_cam_init(struct cafe_camera
*cam
)
857 struct v4l2_chip_ident chip
= { V4L2_CHIP_MATCH_I2C_ADDR
, 0, 0, 0 };
860 mutex_lock(&cam
->s_mutex
);
861 if (cam
->state
!= S_NOTREADY
)
862 cam_warn(cam
, "Cam init with device in funky state %d",
864 ret
= __cafe_cam_reset(cam
);
867 chip
.match_chip
= cam
->sensor
->addr
;
868 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_CHIP_IDENT
, &chip
);
871 cam
->sensor_type
= chip
.ident
;
872 // if (cam->sensor->addr != OV7xx0_SID) {
873 if (cam
->sensor_type
!= V4L2_IDENT_OV7670
) {
874 cam_err(cam
, "Unsupported sensor type %d", cam
->sensor
->addr
);
878 /* Get/set parameters? */
882 cafe_ctlr_power_down(cam
);
883 mutex_unlock(&cam
->s_mutex
);
888 * Configure the sensor to match the parameters we have. Caller should
891 static int cafe_cam_set_flip(struct cafe_camera
*cam
)
893 struct v4l2_control ctrl
;
895 memset(&ctrl
, 0, sizeof(ctrl
));
896 ctrl
.id
= V4L2_CID_VFLIP
;
898 return __cafe_cam_cmd(cam
, VIDIOC_S_CTRL
, &ctrl
);
902 static int cafe_cam_configure(struct cafe_camera
*cam
)
904 struct v4l2_format fmt
;
907 if (cam
->state
!= S_IDLE
)
909 fmt
.fmt
.pix
= cam
->pix_format
;
910 ret
= __cafe_cam_cmd(cam
, VIDIOC_INT_INIT
, &zero
);
912 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_FMT
, &fmt
);
914 * OV7670 does weird things if flip is set *before* format...
916 ret
+= cafe_cam_set_flip(cam
);
920 /* -------------------------------------------------------------------- */
922 * DMA buffer management. These functions need s_mutex held.
925 /* FIXME: this is inefficient as hell, since dma_alloc_coherent just
926 * does a get_free_pages() call, and we waste a good chunk of an orderN
927 * allocation. Should try to allocate the whole set in one chunk.
929 static int cafe_alloc_dma_bufs(struct cafe_camera
*cam
, int loadtime
)
933 cafe_set_config_needed(cam
, 1);
935 cam
->dma_buf_size
= dma_buf_size
;
937 cam
->dma_buf_size
= cam
->pix_format
.sizeimage
;
942 for (i
= 0; i
< n_dma_bufs
; i
++) {
943 cam
->dma_bufs
[i
] = dma_alloc_coherent(&cam
->pdev
->dev
,
944 cam
->dma_buf_size
, cam
->dma_handles
+ i
,
946 if (cam
->dma_bufs
[i
] == NULL
) {
947 cam_warn(cam
, "Failed to allocate DMA buffer\n");
950 /* For debug, remove eventually */
951 memset(cam
->dma_bufs
[i
], 0xcc, cam
->dma_buf_size
);
955 switch (cam
->nbufs
) {
957 dma_free_coherent(&cam
->pdev
->dev
, cam
->dma_buf_size
,
958 cam
->dma_bufs
[0], cam
->dma_handles
[0]);
961 cam_err(cam
, "Insufficient DMA buffers, cannot operate\n");
966 cam_warn(cam
, "Will limp along with only 2 buffers\n");
972 static void cafe_free_dma_bufs(struct cafe_camera
*cam
)
976 for (i
= 0; i
< cam
->nbufs
; i
++) {
977 dma_free_coherent(&cam
->pdev
->dev
, cam
->dma_buf_size
,
978 cam
->dma_bufs
[i
], cam
->dma_handles
[i
]);
979 cam
->dma_bufs
[i
] = NULL
;
988 /* ----------------------------------------------------------------------- */
990 * Here starts the V4L2 interface code.
994 * Read an image from the device.
996 static ssize_t
cafe_deliver_buffer(struct cafe_camera
*cam
,
997 char __user
*buffer
, size_t len
, loff_t
*pos
)
1000 unsigned long flags
;
1002 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1003 if (cam
->next_buf
< 0) {
1004 cam_err(cam
, "deliver_buffer: No next buffer\n");
1005 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1008 bufno
= cam
->next_buf
;
1009 clear_bit(bufno
, &cam
->flags
);
1010 if (++(cam
->next_buf
) >= cam
->nbufs
)
1012 if (! test_bit(cam
->next_buf
, &cam
->flags
))
1014 cam
->specframes
= 0;
1015 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1017 if (len
> cam
->pix_format
.sizeimage
)
1018 len
= cam
->pix_format
.sizeimage
;
1019 if (copy_to_user(buffer
, cam
->dma_bufs
[bufno
], len
))
1026 * Get everything ready, and start grabbing frames.
1028 static int cafe_read_setup(struct cafe_camera
*cam
, enum cafe_state state
)
1031 unsigned long flags
;
1034 * Configuration. If we still don't have DMA buffers,
1035 * make one last, desperate attempt.
1037 if (cam
->nbufs
== 0)
1038 if (cafe_alloc_dma_bufs(cam
, 0))
1041 if (cafe_needs_config(cam
)) {
1042 cafe_cam_configure(cam
);
1043 ret
= cafe_ctlr_configure(cam
);
1051 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1052 cafe_reset_buffers(cam
);
1053 cafe_ctlr_irq_enable(cam
);
1055 cafe_ctlr_start(cam
);
1056 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1061 static ssize_t
cafe_v4l_read(struct file
*filp
,
1062 char __user
*buffer
, size_t len
, loff_t
*pos
)
1064 struct cafe_camera
*cam
= filp
->private_data
;
1068 * Perhaps we're in speculative read mode and already
1071 mutex_lock(&cam
->s_mutex
);
1072 if (cam
->state
== S_SPECREAD
) {
1073 if (cam
->next_buf
>= 0) {
1074 ret
= cafe_deliver_buffer(cam
, buffer
, len
, pos
);
1078 } else if (cam
->state
== S_FLAKED
|| cam
->state
== S_NOTREADY
) {
1081 } else if (cam
->state
!= S_IDLE
) {
1087 * v4l2: multiple processes can open the device, but only
1088 * one gets to grab data from it.
1090 if (cam
->owner
&& cam
->owner
!= filp
) {
1097 * Do setup if need be.
1099 if (cam
->state
!= S_SPECREAD
) {
1100 ret
= cafe_read_setup(cam
, S_SINGLEREAD
);
1105 * Wait for something to happen. This should probably
1106 * be interruptible (FIXME).
1108 wait_event_timeout(cam
->iowait
, cam
->next_buf
>= 0, HZ
);
1109 if (cam
->next_buf
< 0) {
1110 cam_err(cam
, "read() operation timed out\n");
1111 cafe_ctlr_stop_dma(cam
);
1116 * Give them their data and we should be done.
1118 ret
= cafe_deliver_buffer(cam
, buffer
, len
, pos
);
1121 mutex_unlock(&cam
->s_mutex
);
1133 * Streaming I/O support.
1138 static int cafe_vidioc_streamon(struct file
*filp
, void *priv
,
1139 enum v4l2_buf_type type
)
1141 struct cafe_camera
*cam
= filp
->private_data
;
1144 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1146 mutex_lock(&cam
->s_mutex
);
1147 if (cam
->state
!= S_IDLE
|| cam
->n_sbufs
== 0)
1151 ret
= cafe_read_setup(cam
, S_STREAMING
);
1154 mutex_unlock(&cam
->s_mutex
);
1160 static int cafe_vidioc_streamoff(struct file
*filp
, void *priv
,
1161 enum v4l2_buf_type type
)
1163 struct cafe_camera
*cam
= filp
->private_data
;
1166 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1168 mutex_lock(&cam
->s_mutex
);
1169 if (cam
->state
!= S_STREAMING
)
1172 cafe_ctlr_stop_dma(cam
);
1176 mutex_unlock(&cam
->s_mutex
);
1183 static int cafe_setup_siobuf(struct cafe_camera
*cam
, int index
)
1185 struct cafe_sio_buffer
*buf
= cam
->sb_bufs
+ index
;
1187 INIT_LIST_HEAD(&buf
->list
);
1188 buf
->v4lbuf
.length
= PAGE_ALIGN(cam
->pix_format
.sizeimage
);
1189 buf
->buffer
= vmalloc_user(buf
->v4lbuf
.length
);
1190 if (buf
->buffer
== NULL
)
1195 buf
->v4lbuf
.index
= index
;
1196 buf
->v4lbuf
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1197 buf
->v4lbuf
.field
= V4L2_FIELD_NONE
;
1198 buf
->v4lbuf
.memory
= V4L2_MEMORY_MMAP
;
1200 * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg
1201 * just uses the length times the index, but the spec warns
1202 * against doing just that - vma merging problems. So we
1203 * leave a gap between each pair of buffers.
1205 buf
->v4lbuf
.m
.offset
= 2*index
*buf
->v4lbuf
.length
;
1209 static int cafe_free_sio_buffers(struct cafe_camera
*cam
)
1214 * If any buffers are mapped, we cannot free them at all.
1216 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1217 if (cam
->sb_bufs
[i
].mapcount
> 0)
1222 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1223 vfree(cam
->sb_bufs
[i
].buffer
);
1225 kfree(cam
->sb_bufs
);
1226 cam
->sb_bufs
= NULL
;
1227 INIT_LIST_HEAD(&cam
->sb_avail
);
1228 INIT_LIST_HEAD(&cam
->sb_full
);
1234 static int cafe_vidioc_reqbufs(struct file
*filp
, void *priv
,
1235 struct v4l2_requestbuffers
*req
)
1237 struct cafe_camera
*cam
= filp
->private_data
;
1238 int ret
= 0; /* Silence warning */
1241 * Make sure it's something we can do. User pointers could be
1242 * implemented without great pain, but that's not been done yet.
1244 if (req
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1246 if (req
->memory
!= V4L2_MEMORY_MMAP
)
1249 * If they ask for zero buffers, they really want us to stop streaming
1250 * (if it's happening) and free everything. Should we check owner?
1252 mutex_lock(&cam
->s_mutex
);
1253 if (req
->count
== 0) {
1254 if (cam
->state
== S_STREAMING
)
1255 cafe_ctlr_stop_dma(cam
);
1256 ret
= cafe_free_sio_buffers (cam
);
1260 * Device needs to be idle and working. We *could* try to do the
1261 * right thing in S_SPECREAD by shutting things down, but it
1262 * probably doesn't matter.
1264 if (cam
->state
!= S_IDLE
|| (cam
->owner
&& cam
->owner
!= filp
)) {
1270 if (req
->count
< min_buffers
)
1271 req
->count
= min_buffers
;
1272 else if (req
->count
> max_buffers
)
1273 req
->count
= max_buffers
;
1274 if (cam
->n_sbufs
> 0) {
1275 ret
= cafe_free_sio_buffers(cam
);
1280 cam
->sb_bufs
= kzalloc(req
->count
*sizeof(struct cafe_sio_buffer
),
1282 if (cam
->sb_bufs
== NULL
) {
1286 for (cam
->n_sbufs
= 0; cam
->n_sbufs
< req
->count
; (cam
->n_sbufs
++)) {
1287 ret
= cafe_setup_siobuf(cam
, cam
->n_sbufs
);
1292 if (cam
->n_sbufs
== 0) /* no luck at all - ret already set */
1293 kfree(cam
->sb_bufs
);
1294 req
->count
= cam
->n_sbufs
; /* In case of partial success */
1297 mutex_unlock(&cam
->s_mutex
);
1302 static int cafe_vidioc_querybuf(struct file
*filp
, void *priv
,
1303 struct v4l2_buffer
*buf
)
1305 struct cafe_camera
*cam
= filp
->private_data
;
1308 mutex_lock(&cam
->s_mutex
);
1309 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1311 if (buf
->index
< 0 || buf
->index
>= cam
->n_sbufs
)
1313 *buf
= cam
->sb_bufs
[buf
->index
].v4lbuf
;
1316 mutex_unlock(&cam
->s_mutex
);
1320 static int cafe_vidioc_qbuf(struct file
*filp
, void *priv
,
1321 struct v4l2_buffer
*buf
)
1323 struct cafe_camera
*cam
= filp
->private_data
;
1324 struct cafe_sio_buffer
*sbuf
;
1326 unsigned long flags
;
1328 mutex_lock(&cam
->s_mutex
);
1329 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1331 if (buf
->index
< 0 || buf
->index
>= cam
->n_sbufs
)
1333 sbuf
= cam
->sb_bufs
+ buf
->index
;
1334 if (sbuf
->v4lbuf
.flags
& V4L2_BUF_FLAG_QUEUED
) {
1335 ret
= 0; /* Already queued?? */
1338 if (sbuf
->v4lbuf
.flags
& V4L2_BUF_FLAG_DONE
) {
1339 /* Spec doesn't say anything, seems appropriate tho */
1343 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_QUEUED
;
1344 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1345 list_add(&sbuf
->list
, &cam
->sb_avail
);
1346 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1349 mutex_unlock(&cam
->s_mutex
);
1353 static int cafe_vidioc_dqbuf(struct file
*filp
, void *priv
,
1354 struct v4l2_buffer
*buf
)
1356 struct cafe_camera
*cam
= filp
->private_data
;
1357 struct cafe_sio_buffer
*sbuf
;
1359 unsigned long flags
;
1361 mutex_lock(&cam
->s_mutex
);
1362 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1364 if (cam
->state
!= S_STREAMING
)
1366 if (list_empty(&cam
->sb_full
) && filp
->f_flags
& O_NONBLOCK
) {
1371 while (list_empty(&cam
->sb_full
) && cam
->state
== S_STREAMING
) {
1372 mutex_unlock(&cam
->s_mutex
);
1373 if (wait_event_interruptible(cam
->iowait
,
1374 !list_empty(&cam
->sb_full
))) {
1378 mutex_lock(&cam
->s_mutex
);
1381 if (cam
->state
!= S_STREAMING
)
1384 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1385 /* Should probably recheck !list_empty() here */
1386 sbuf
= list_entry(cam
->sb_full
.next
,
1387 struct cafe_sio_buffer
, list
);
1388 list_del_init(&sbuf
->list
);
1389 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1390 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_DONE
;
1391 *buf
= sbuf
->v4lbuf
;
1396 mutex_unlock(&cam
->s_mutex
);
1403 static void cafe_v4l_vm_open(struct vm_area_struct
*vma
)
1405 struct cafe_sio_buffer
*sbuf
= vma
->vm_private_data
;
1407 * Locking: done under mmap_sem, so we don't need to
1408 * go back to the camera lock here.
1414 static void cafe_v4l_vm_close(struct vm_area_struct
*vma
)
1416 struct cafe_sio_buffer
*sbuf
= vma
->vm_private_data
;
1418 mutex_lock(&sbuf
->cam
->s_mutex
);
1420 /* Docs say we should stop I/O too... */
1421 if (sbuf
->mapcount
== 0)
1422 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_MAPPED
;
1423 mutex_unlock(&sbuf
->cam
->s_mutex
);
1426 static struct vm_operations_struct cafe_v4l_vm_ops
= {
1427 .open
= cafe_v4l_vm_open
,
1428 .close
= cafe_v4l_vm_close
1432 static int cafe_v4l_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
1434 struct cafe_camera
*cam
= filp
->private_data
;
1435 unsigned long offset
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1438 struct cafe_sio_buffer
*sbuf
= NULL
;
1440 if (! (vma
->vm_flags
& VM_WRITE
) || ! (vma
->vm_flags
& VM_SHARED
))
1443 * Find the buffer they are looking for.
1445 mutex_lock(&cam
->s_mutex
);
1446 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1447 if (cam
->sb_bufs
[i
].v4lbuf
.m
.offset
== offset
) {
1448 sbuf
= cam
->sb_bufs
+ i
;
1454 ret
= remap_vmalloc_range(vma
, sbuf
->buffer
, 0);
1457 vma
->vm_flags
|= VM_DONTEXPAND
;
1458 vma
->vm_private_data
= sbuf
;
1459 vma
->vm_ops
= &cafe_v4l_vm_ops
;
1460 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_MAPPED
;
1461 cafe_v4l_vm_open(vma
);
1464 mutex_unlock(&cam
->s_mutex
);
1470 static int cafe_v4l_open(struct inode
*inode
, struct file
*filp
)
1472 struct cafe_camera
*cam
;
1474 cam
= cafe_find_dev(iminor(inode
));
1477 filp
->private_data
= cam
;
1479 mutex_lock(&cam
->s_mutex
);
1480 if (cam
->users
== 0) {
1481 cafe_ctlr_power_up(cam
);
1482 __cafe_cam_reset(cam
);
1483 cafe_set_config_needed(cam
, 1);
1484 /* FIXME make sure this is complete */
1487 mutex_unlock(&cam
->s_mutex
);
1492 static int cafe_v4l_release(struct inode
*inode
, struct file
*filp
)
1494 struct cafe_camera
*cam
= filp
->private_data
;
1496 mutex_lock(&cam
->s_mutex
);
1498 if (filp
== cam
->owner
) {
1499 cafe_ctlr_stop_dma(cam
);
1500 cafe_free_sio_buffers(cam
);
1503 if (cam
->users
== 0) {
1504 cafe_ctlr_power_down(cam
);
1505 if (alloc_bufs_at_read
)
1506 cafe_free_dma_bufs(cam
);
1508 mutex_unlock(&cam
->s_mutex
);
1514 static unsigned int cafe_v4l_poll(struct file
*filp
,
1515 struct poll_table_struct
*pt
)
1517 struct cafe_camera
*cam
= filp
->private_data
;
1519 poll_wait(filp
, &cam
->iowait
, pt
);
1520 if (cam
->next_buf
>= 0)
1521 return POLLIN
| POLLRDNORM
;
1527 static int cafe_vidioc_queryctrl(struct file
*filp
, void *priv
,
1528 struct v4l2_queryctrl
*qc
)
1530 struct cafe_camera
*cam
= filp
->private_data
;
1533 mutex_lock(&cam
->s_mutex
);
1534 ret
= __cafe_cam_cmd(cam
, VIDIOC_QUERYCTRL
, qc
);
1535 mutex_unlock(&cam
->s_mutex
);
1540 static int cafe_vidioc_g_ctrl(struct file
*filp
, void *priv
,
1541 struct v4l2_control
*ctrl
)
1543 struct cafe_camera
*cam
= filp
->private_data
;
1546 mutex_lock(&cam
->s_mutex
);
1547 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_CTRL
, ctrl
);
1548 mutex_unlock(&cam
->s_mutex
);
1553 static int cafe_vidioc_s_ctrl(struct file
*filp
, void *priv
,
1554 struct v4l2_control
*ctrl
)
1556 struct cafe_camera
*cam
= filp
->private_data
;
1559 mutex_lock(&cam
->s_mutex
);
1560 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_CTRL
, ctrl
);
1561 mutex_unlock(&cam
->s_mutex
);
1569 static int cafe_vidioc_querycap(struct file
*file
, void *priv
,
1570 struct v4l2_capability
*cap
)
1572 strcpy(cap
->driver
, "cafe_ccic");
1573 strcpy(cap
->card
, "cafe_ccic");
1574 cap
->version
= CAFE_VERSION
;
1575 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
|
1576 V4L2_CAP_READWRITE
| V4L2_CAP_STREAMING
;
1582 * The default format we use until somebody says otherwise.
1584 static struct v4l2_pix_format cafe_def_pix_format
= {
1586 .height
= VGA_HEIGHT
,
1587 .pixelformat
= V4L2_PIX_FMT_YUYV
,
1588 .field
= V4L2_FIELD_NONE
,
1589 .bytesperline
= VGA_WIDTH
*2,
1590 .sizeimage
= VGA_WIDTH
*VGA_HEIGHT
*2,
1593 static int cafe_vidioc_enum_fmt_cap(struct file
*filp
,
1594 void *priv
, struct v4l2_fmtdesc
*fmt
)
1596 struct cafe_camera
*cam
= priv
;
1599 if (fmt
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1601 mutex_lock(&cam
->s_mutex
);
1602 ret
= __cafe_cam_cmd(cam
, VIDIOC_ENUM_FMT
, fmt
);
1603 mutex_unlock(&cam
->s_mutex
);
1608 static int cafe_vidioc_try_fmt_cap (struct file
*filp
, void *priv
,
1609 struct v4l2_format
*fmt
)
1611 struct cafe_camera
*cam
= priv
;
1614 mutex_lock(&cam
->s_mutex
);
1615 ret
= __cafe_cam_cmd(cam
, VIDIOC_TRY_FMT
, fmt
);
1616 mutex_unlock(&cam
->s_mutex
);
1620 static int cafe_vidioc_s_fmt_cap(struct file
*filp
, void *priv
,
1621 struct v4l2_format
*fmt
)
1623 struct cafe_camera
*cam
= priv
;
1627 * Can't do anything if the device is not idle
1628 * Also can't if there are streaming buffers in place.
1630 if (cam
->state
!= S_IDLE
|| cam
->n_sbufs
> 0)
1633 * See if the formatting works in principle.
1635 ret
= cafe_vidioc_try_fmt_cap(filp
, priv
, fmt
);
1639 * Now we start to change things for real, so let's do it
1642 mutex_lock(&cam
->s_mutex
);
1643 cam
->pix_format
= fmt
->fmt
.pix
;
1645 * Make sure we have appropriate DMA buffers.
1648 if (cam
->nbufs
> 0 && cam
->dma_buf_size
< cam
->pix_format
.sizeimage
)
1649 cafe_free_dma_bufs(cam
);
1650 if (cam
->nbufs
== 0) {
1651 if (cafe_alloc_dma_bufs(cam
, 0))
1655 * It looks like this might work, so let's program the sensor.
1657 ret
= cafe_cam_configure(cam
);
1659 ret
= cafe_ctlr_configure(cam
);
1661 mutex_unlock(&cam
->s_mutex
);
1666 * Return our stored notion of how the camera is/should be configured.
1667 * The V4l2 spec wants us to be smarter, and actually get this from
1668 * the camera (and not mess with it at open time). Someday.
1670 static int cafe_vidioc_g_fmt_cap(struct file
*filp
, void *priv
,
1671 struct v4l2_format
*f
)
1673 struct cafe_camera
*cam
= priv
;
1675 f
->fmt
.pix
= cam
->pix_format
;
1680 * We only have one input - the sensor - so minimize the nonsense here.
1682 static int cafe_vidioc_enum_input(struct file
*filp
, void *priv
,
1683 struct v4l2_input
*input
)
1685 if (input
->index
!= 0)
1688 input
->type
= V4L2_INPUT_TYPE_CAMERA
;
1689 input
->std
= V4L2_STD_ALL
; /* Not sure what should go here */
1690 strcpy(input
->name
, "Camera");
1694 static int cafe_vidioc_g_input(struct file
*filp
, void *priv
, unsigned int *i
)
1700 static int cafe_vidioc_s_input(struct file
*filp
, void *priv
, unsigned int i
)
1708 static int cafe_vidioc_s_std(struct file
*filp
, void *priv
, v4l2_std_id
*a
)
1714 * G/S_PARM. Most of this is done by the sensor, but we are
1715 * the level which controls the number of read buffers.
1717 static int cafe_vidioc_g_parm(struct file
*filp
, void *priv
,
1718 struct v4l2_streamparm
*parms
)
1720 struct cafe_camera
*cam
= priv
;
1723 mutex_lock(&cam
->s_mutex
);
1724 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_PARM
, parms
);
1725 mutex_unlock(&cam
->s_mutex
);
1726 parms
->parm
.capture
.readbuffers
= n_dma_bufs
;
1730 static int cafe_vidioc_s_parm(struct file
*filp
, void *priv
,
1731 struct v4l2_streamparm
*parms
)
1733 struct cafe_camera
*cam
= priv
;
1736 mutex_lock(&cam
->s_mutex
);
1737 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_PARM
, parms
);
1738 mutex_unlock(&cam
->s_mutex
);
1739 parms
->parm
.capture
.readbuffers
= n_dma_bufs
;
1744 static void cafe_v4l_dev_release(struct video_device
*vd
)
1746 struct cafe_camera
*cam
= container_of(vd
, struct cafe_camera
, v4ldev
);
1753 * This template device holds all of those v4l2 methods; we
1754 * clone it for specific real devices.
1757 static const struct file_operations cafe_v4l_fops
= {
1758 .owner
= THIS_MODULE
,
1759 .open
= cafe_v4l_open
,
1760 .release
= cafe_v4l_release
,
1761 .read
= cafe_v4l_read
,
1762 .poll
= cafe_v4l_poll
,
1763 .mmap
= cafe_v4l_mmap
,
1764 .ioctl
= video_ioctl2
,
1765 .llseek
= no_llseek
,
1768 static struct video_device cafe_v4l_template
= {
1770 .type
= VFL_TYPE_GRABBER
,
1771 .type2
= VID_TYPE_CAPTURE
,
1772 .minor
= -1, /* Get one dynamically */
1773 .tvnorms
= V4L2_STD_NTSC_M
,
1774 .current_norm
= V4L2_STD_NTSC_M
, /* make mplayer happy */
1776 .fops
= &cafe_v4l_fops
,
1777 .release
= cafe_v4l_dev_release
,
1779 .vidioc_querycap
= cafe_vidioc_querycap
,
1780 .vidioc_enum_fmt_cap
= cafe_vidioc_enum_fmt_cap
,
1781 .vidioc_try_fmt_cap
= cafe_vidioc_try_fmt_cap
,
1782 .vidioc_s_fmt_cap
= cafe_vidioc_s_fmt_cap
,
1783 .vidioc_g_fmt_cap
= cafe_vidioc_g_fmt_cap
,
1784 .vidioc_enum_input
= cafe_vidioc_enum_input
,
1785 .vidioc_g_input
= cafe_vidioc_g_input
,
1786 .vidioc_s_input
= cafe_vidioc_s_input
,
1787 .vidioc_s_std
= cafe_vidioc_s_std
,
1788 .vidioc_reqbufs
= cafe_vidioc_reqbufs
,
1789 .vidioc_querybuf
= cafe_vidioc_querybuf
,
1790 .vidioc_qbuf
= cafe_vidioc_qbuf
,
1791 .vidioc_dqbuf
= cafe_vidioc_dqbuf
,
1792 .vidioc_streamon
= cafe_vidioc_streamon
,
1793 .vidioc_streamoff
= cafe_vidioc_streamoff
,
1794 .vidioc_queryctrl
= cafe_vidioc_queryctrl
,
1795 .vidioc_g_ctrl
= cafe_vidioc_g_ctrl
,
1796 .vidioc_s_ctrl
= cafe_vidioc_s_ctrl
,
1797 .vidioc_g_parm
= cafe_vidioc_g_parm
,
1798 .vidioc_s_parm
= cafe_vidioc_s_parm
,
1807 /* ---------------------------------------------------------------------- */
1809 * Interrupt handler stuff
1814 static void cafe_frame_tasklet(unsigned long data
)
1816 struct cafe_camera
*cam
= (struct cafe_camera
*) data
;
1818 unsigned long flags
;
1819 struct cafe_sio_buffer
*sbuf
;
1821 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1822 for (i
= 0; i
< cam
->nbufs
; i
++) {
1823 int bufno
= cam
->next_buf
;
1824 if (bufno
< 0) { /* "will never happen" */
1825 cam_err(cam
, "No valid bufs in tasklet!\n");
1828 if (++(cam
->next_buf
) >= cam
->nbufs
)
1830 if (! test_bit(bufno
, &cam
->flags
))
1832 if (list_empty(&cam
->sb_avail
))
1833 break; /* Leave it valid, hope for better later */
1834 clear_bit(bufno
, &cam
->flags
);
1835 sbuf
= list_entry(cam
->sb_avail
.next
,
1836 struct cafe_sio_buffer
, list
);
1838 * Drop the lock during the big copy. This *should* be safe...
1840 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1841 memcpy(sbuf
->buffer
, cam
->dma_bufs
[bufno
],
1842 cam
->pix_format
.sizeimage
);
1843 sbuf
->v4lbuf
.bytesused
= cam
->pix_format
.sizeimage
;
1844 sbuf
->v4lbuf
.sequence
= cam
->buf_seq
[bufno
];
1845 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_QUEUED
;
1846 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_DONE
;
1847 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1848 list_move_tail(&sbuf
->list
, &cam
->sb_full
);
1850 if (! list_empty(&cam
->sb_full
))
1851 wake_up(&cam
->iowait
);
1852 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1857 static void cafe_frame_complete(struct cafe_camera
*cam
, int frame
)
1860 * Basic frame housekeeping.
1862 if (test_bit(frame
, &cam
->flags
) && printk_ratelimit())
1863 cam_err(cam
, "Frame overrun on %d, frames lost\n", frame
);
1864 set_bit(frame
, &cam
->flags
);
1865 clear_bit(CF_DMA_ACTIVE
, &cam
->flags
);
1866 if (cam
->next_buf
< 0)
1867 cam
->next_buf
= frame
;
1868 cam
->buf_seq
[frame
] = ++(cam
->sequence
);
1870 switch (cam
->state
) {
1872 * If in single read mode, try going speculative.
1875 cam
->state
= S_SPECREAD
;
1876 cam
->specframes
= 0;
1877 wake_up(&cam
->iowait
);
1881 * If we are already doing speculative reads, and nobody is
1882 * reading them, just stop.
1885 if (++(cam
->specframes
) >= cam
->nbufs
) {
1886 cafe_ctlr_stop(cam
);
1887 cafe_ctlr_irq_disable(cam
);
1888 cam
->state
= S_IDLE
;
1890 wake_up(&cam
->iowait
);
1893 * For the streaming case, we defer the real work to the
1896 * FIXME: if the application is not consuming the buffers,
1897 * we should eventually put things on hold and restart in
1901 tasklet_schedule(&cam
->s_tasklet
);
1905 cam_err(cam
, "Frame interrupt in non-operational state\n");
1913 static void cafe_frame_irq(struct cafe_camera
*cam
, unsigned int irqs
)
1917 cafe_reg_write(cam
, REG_IRQSTAT
, FRAMEIRQS
); /* Clear'em all */
1919 * Handle any frame completions. There really should
1920 * not be more than one of these, or we have fallen
1923 for (frame
= 0; frame
< cam
->nbufs
; frame
++)
1924 if (irqs
& (IRQ_EOF0
<< frame
))
1925 cafe_frame_complete(cam
, frame
);
1927 * If a frame starts, note that we have DMA active. This
1928 * code assumes that we won't get multiple frame interrupts
1929 * at once; may want to rethink that.
1931 if (irqs
& (IRQ_SOF0
| IRQ_SOF1
| IRQ_SOF2
))
1932 set_bit(CF_DMA_ACTIVE
, &cam
->flags
);
1937 static irqreturn_t
cafe_irq(int irq
, void *data
)
1939 struct cafe_camera
*cam
= data
;
1942 spin_lock(&cam
->dev_lock
);
1943 irqs
= cafe_reg_read(cam
, REG_IRQSTAT
);
1944 if ((irqs
& ALLIRQS
) == 0) {
1945 spin_unlock(&cam
->dev_lock
);
1948 if (irqs
& FRAMEIRQS
)
1949 cafe_frame_irq(cam
, irqs
);
1950 if (irqs
& TWSIIRQS
) {
1951 cafe_reg_write(cam
, REG_IRQSTAT
, TWSIIRQS
);
1952 wake_up(&cam
->smbus_wait
);
1954 spin_unlock(&cam
->dev_lock
);
1959 /* -------------------------------------------------------------------------- */
1960 #ifdef CONFIG_VIDEO_ADV_DEBUG
1965 static char cafe_debug_buf
[1024];
1966 static struct dentry
*cafe_dfs_root
;
1968 static void cafe_dfs_setup(void)
1970 cafe_dfs_root
= debugfs_create_dir("cafe_ccic", NULL
);
1971 if (IS_ERR(cafe_dfs_root
)) {
1972 cafe_dfs_root
= NULL
; /* Never mind */
1973 printk(KERN_NOTICE
"cafe_ccic unable to set up debugfs\n");
1977 static void cafe_dfs_shutdown(void)
1980 debugfs_remove(cafe_dfs_root
);
1983 static int cafe_dfs_open(struct inode
*inode
, struct file
*file
)
1985 file
->private_data
= inode
->i_private
;
1989 static ssize_t
cafe_dfs_read_regs(struct file
*file
,
1990 char __user
*buf
, size_t count
, loff_t
*ppos
)
1992 struct cafe_camera
*cam
= file
->private_data
;
1993 char *s
= cafe_debug_buf
;
1996 for (offset
= 0; offset
< 0x44; offset
+= 4)
1997 s
+= sprintf(s
, "%02x: %08x\n", offset
,
1998 cafe_reg_read(cam
, offset
));
1999 for (offset
= 0x88; offset
<= 0x90; offset
+= 4)
2000 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2001 cafe_reg_read(cam
, offset
));
2002 for (offset
= 0xb4; offset
<= 0xbc; offset
+= 4)
2003 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2004 cafe_reg_read(cam
, offset
));
2005 for (offset
= 0x3000; offset
<= 0x300c; offset
+= 4)
2006 s
+= sprintf(s
, "%04x: %08x\n", offset
,
2007 cafe_reg_read(cam
, offset
));
2008 return simple_read_from_buffer(buf
, count
, ppos
, cafe_debug_buf
,
2009 s
- cafe_debug_buf
);
2012 static const struct file_operations cafe_dfs_reg_ops
= {
2013 .owner
= THIS_MODULE
,
2014 .read
= cafe_dfs_read_regs
,
2015 .open
= cafe_dfs_open
2018 static ssize_t
cafe_dfs_read_cam(struct file
*file
,
2019 char __user
*buf
, size_t count
, loff_t
*ppos
)
2021 struct cafe_camera
*cam
= file
->private_data
;
2022 char *s
= cafe_debug_buf
;
2027 for (offset
= 0x0; offset
< 0x8a; offset
++)
2031 cafe_smbus_read_data(cam
, cam
->sensor
->addr
, offset
, &v
);
2032 s
+= sprintf(s
, "%02x: %02x\n", offset
, v
);
2034 return simple_read_from_buffer(buf
, count
, ppos
, cafe_debug_buf
,
2035 s
- cafe_debug_buf
);
2038 static const struct file_operations cafe_dfs_cam_ops
= {
2039 .owner
= THIS_MODULE
,
2040 .read
= cafe_dfs_read_cam
,
2041 .open
= cafe_dfs_open
2046 static void cafe_dfs_cam_setup(struct cafe_camera
*cam
)
2052 sprintf(fname
, "regs-%d", cam
->v4ldev
.minor
);
2053 cam
->dfs_regs
= debugfs_create_file(fname
, 0444, cafe_dfs_root
,
2054 cam
, &cafe_dfs_reg_ops
);
2055 sprintf(fname
, "cam-%d", cam
->v4ldev
.minor
);
2056 cam
->dfs_cam_regs
= debugfs_create_file(fname
, 0444, cafe_dfs_root
,
2057 cam
, &cafe_dfs_cam_ops
);
2061 static void cafe_dfs_cam_shutdown(struct cafe_camera
*cam
)
2063 if (! IS_ERR(cam
->dfs_regs
))
2064 debugfs_remove(cam
->dfs_regs
);
2065 if (! IS_ERR(cam
->dfs_cam_regs
))
2066 debugfs_remove(cam
->dfs_cam_regs
);
2071 #define cafe_dfs_setup()
2072 #define cafe_dfs_shutdown()
2073 #define cafe_dfs_cam_setup(cam)
2074 #define cafe_dfs_cam_shutdown(cam)
2075 #endif /* CONFIG_VIDEO_ADV_DEBUG */
2080 /* ------------------------------------------------------------------------*/
2082 * PCI interface stuff.
2085 static int cafe_pci_probe(struct pci_dev
*pdev
,
2086 const struct pci_device_id
*id
)
2090 struct cafe_camera
*cam
;
2092 * Make sure we have a camera here - we'll get calls for
2093 * the other cafe devices as well.
2095 pci_read_config_word(pdev
, PCI_CLASS_DEVICE
, &classword
);
2096 if (classword
!= PCI_CLASS_MULTIMEDIA_VIDEO
)
2099 * Start putting together one of our big camera structures.
2102 cam
= kzalloc(sizeof(struct cafe_camera
), GFP_KERNEL
);
2105 mutex_init(&cam
->s_mutex
);
2106 mutex_lock(&cam
->s_mutex
);
2107 spin_lock_init(&cam
->dev_lock
);
2108 cam
->state
= S_NOTREADY
;
2109 cafe_set_config_needed(cam
, 1);
2110 init_waitqueue_head(&cam
->smbus_wait
);
2111 init_waitqueue_head(&cam
->iowait
);
2113 cam
->pix_format
= cafe_def_pix_format
;
2114 INIT_LIST_HEAD(&cam
->dev_list
);
2115 INIT_LIST_HEAD(&cam
->sb_avail
);
2116 INIT_LIST_HEAD(&cam
->sb_full
);
2117 tasklet_init(&cam
->s_tasklet
, cafe_frame_tasklet
, (unsigned long) cam
);
2119 * Get set up on the PCI bus.
2121 ret
= pci_enable_device(pdev
);
2124 pci_set_master(pdev
);
2127 cam
->regs
= pci_iomap(pdev
, 0, 0);
2129 printk(KERN_ERR
"Unable to ioremap cafe-ccic regs\n");
2132 ret
= request_irq(pdev
->irq
, cafe_irq
, IRQF_SHARED
, "cafe-ccic", cam
);
2136 * Initialize the controller and leave it powered up. It will
2137 * stay that way until the sensor driver shows up.
2139 cafe_ctlr_init(cam
);
2140 cafe_ctlr_power_up(cam
);
2142 * Set up I2C/SMBUS communications. We have to drop the mutex here
2143 * because the sensor could attach in this call chain, leading to
2144 * unsightly deadlocks.
2146 mutex_unlock(&cam
->s_mutex
); /* attach can deadlock */
2147 ret
= cafe_smbus_setup(cam
);
2151 * Get the v4l2 setup done.
2153 mutex_lock(&cam
->s_mutex
);
2154 cam
->v4ldev
= cafe_v4l_template
;
2155 cam
->v4ldev
.debug
= 0;
2156 // cam->v4ldev.debug = V4L2_DEBUG_IOCTL_ARG;
2157 cam
->v4ldev
.dev
= &pdev
->dev
;
2158 ret
= video_register_device(&cam
->v4ldev
, VFL_TYPE_GRABBER
, -1);
2162 * If so requested, try to get our DMA buffers now.
2164 if (!alloc_bufs_at_read
) {
2165 if (cafe_alloc_dma_bufs(cam
, 1))
2166 cam_warn(cam
, "Unable to alloc DMA buffers at load"
2167 " will try again later.");
2170 cafe_dfs_cam_setup(cam
);
2171 mutex_unlock(&cam
->s_mutex
);
2176 cafe_smbus_shutdown(cam
);
2178 cafe_ctlr_power_down(cam
);
2179 free_irq(pdev
->irq
, cam
);
2181 pci_iounmap(pdev
, cam
->regs
);
2190 * Shut down an initialized device
2192 static void cafe_shutdown(struct cafe_camera
*cam
)
2194 /* FIXME: Make sure we take care of everything here */
2195 cafe_dfs_cam_shutdown(cam
);
2196 if (cam
->n_sbufs
> 0)
2197 /* What if they are still mapped? Shouldn't be, but... */
2198 cafe_free_sio_buffers(cam
);
2199 cafe_remove_dev(cam
);
2200 cafe_ctlr_stop_dma(cam
);
2201 cafe_ctlr_power_down(cam
);
2202 cafe_smbus_shutdown(cam
);
2203 cafe_free_dma_bufs(cam
);
2204 free_irq(cam
->pdev
->irq
, cam
);
2205 pci_iounmap(cam
->pdev
, cam
->regs
);
2206 video_unregister_device(&cam
->v4ldev
);
2207 /* kfree(cam); done in v4l_release () */
2211 static void cafe_pci_remove(struct pci_dev
*pdev
)
2213 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2216 printk(KERN_WARNING
"pci_remove on unknown pdev %p\n", pdev
);
2219 mutex_lock(&cam
->s_mutex
);
2221 cam_warn(cam
, "Removing a device with users!\n");
2223 /* No unlock - it no longer exists */
2229 * Basic power management.
2231 static int cafe_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2233 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2236 ret
= pci_save_state(pdev
);
2239 cafe_ctlr_stop_dma(cam
);
2240 cafe_ctlr_power_down(cam
);
2241 pci_disable_device(pdev
);
2246 static int cafe_pci_resume(struct pci_dev
*pdev
)
2248 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2251 ret
= pci_restore_state(pdev
);
2254 ret
= pci_enable_device(pdev
);
2257 cam_warn(cam
, "Unable to re-enable device on resume!\n");
2260 cafe_ctlr_init(cam
);
2261 cafe_ctlr_power_down(cam
);
2263 mutex_lock(&cam
->s_mutex
);
2264 if (cam
->users
> 0) {
2265 cafe_ctlr_power_up(cam
);
2266 __cafe_cam_reset(cam
);
2268 mutex_unlock(&cam
->s_mutex
);
2270 set_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
2271 if (cam
->state
== S_SPECREAD
)
2272 cam
->state
= S_IDLE
; /* Don't bother restarting */
2273 else if (cam
->state
== S_SINGLEREAD
|| cam
->state
== S_STREAMING
)
2274 ret
= cafe_read_setup(cam
, cam
->state
);
2278 #endif /* CONFIG_PM */
2281 static struct pci_device_id cafe_ids
[] = {
2282 { PCI_DEVICE(0x11ab, 0x4100) }, /* Eventual real ID */
2283 { PCI_DEVICE(0x11ab, 0x4102) }, /* Really eventual real ID */
2287 MODULE_DEVICE_TABLE(pci
, cafe_ids
);
2289 static struct pci_driver cafe_pci_driver
= {
2290 .name
= "cafe1000-ccic",
2291 .id_table
= cafe_ids
,
2292 .probe
= cafe_pci_probe
,
2293 .remove
= cafe_pci_remove
,
2295 .suspend
= cafe_pci_suspend
,
2296 .resume
= cafe_pci_resume
,
2303 static int __init
cafe_init(void)
2307 printk(KERN_NOTICE
"Marvell M88ALP01 'CAFE' Camera Controller version %d\n",
2310 ret
= pci_register_driver(&cafe_pci_driver
);
2312 printk(KERN_ERR
"Unable to register cafe_ccic driver\n");
2315 request_module("ov7670"); /* FIXME want something more general */
2323 static void __exit
cafe_exit(void)
2325 pci_unregister_driver(&cafe_pci_driver
);
2326 cafe_dfs_shutdown();
2329 module_init(cafe_init
);
2330 module_exit(cafe_exit
);