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>
23 #include <linux/pci.h>
24 #include <linux/i2c.h>
25 #include <linux/interrupt.h>
26 #include <linux/spinlock.h>
27 #include <linux/videodev2.h>
28 #include <media/v4l2-common.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-chip-ident.h>
31 #include <linux/device.h>
32 #include <linux/wait.h>
33 #include <linux/list.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/delay.h>
36 #include <linux/debugfs.h>
37 #include <linux/jiffies.h>
38 #include <linux/vmalloc.h>
40 #include <asm/uaccess.h>
43 #include "cafe_ccic-regs.h"
45 #define CAFE_VERSION 0x000002
51 MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>");
52 MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver");
53 MODULE_LICENSE("GPL");
54 MODULE_SUPPORTED_DEVICE("Video");
57 * Internal DMA buffer management. Since the controller cannot do S/G I/O,
58 * we must have physically contiguous buffers to bring frames into.
59 * These parameters control how many buffers we use, whether we
60 * allocate them at load time (better chance of success, but nails down
61 * memory) or when somebody tries to use the camera (riskier), and,
62 * for load-time allocation, how big they should be.
64 * The controller can cycle through three buffers. We could use
65 * more by flipping pointers around, but it probably makes little
69 #define MAX_DMA_BUFS 3
70 static int alloc_bufs_at_read
;
71 module_param(alloc_bufs_at_read
, bool, 0444);
72 MODULE_PARM_DESC(alloc_bufs_at_read
,
73 "Non-zero value causes DMA buffers to be allocated when the "
74 "video capture device is read, rather than at module load "
75 "time. This saves memory, but decreases the chances of "
76 "successfully getting those buffers.");
78 static int n_dma_bufs
= 3;
79 module_param(n_dma_bufs
, uint
, 0644);
80 MODULE_PARM_DESC(n_dma_bufs
,
81 "The number of DMA buffers to allocate. Can be either two "
82 "(saves memory, makes timing tighter) or three.");
84 static int dma_buf_size
= VGA_WIDTH
* VGA_HEIGHT
* 2; /* Worst case */
85 module_param(dma_buf_size
, uint
, 0444);
86 MODULE_PARM_DESC(dma_buf_size
,
87 "The size of the allocated DMA buffers. If actual operating "
88 "parameters require larger buffers, an attempt to reallocate "
91 static int min_buffers
= 1;
92 module_param(min_buffers
, uint
, 0644);
93 MODULE_PARM_DESC(min_buffers
,
94 "The minimum number of streaming I/O buffers we are willing "
97 static int max_buffers
= 10;
98 module_param(max_buffers
, uint
, 0644);
99 MODULE_PARM_DESC(max_buffers
,
100 "The maximum number of streaming I/O buffers an application "
101 "will be allowed to allocate. These buffers are big and live "
102 "in vmalloc space.");
105 module_param(flip
, bool, 0444);
106 MODULE_PARM_DESC(flip
,
107 "If set, the sensor will be instructed to flip the image "
112 S_NOTREADY
, /* Not yet initialized */
113 S_IDLE
, /* Just hanging around */
114 S_FLAKED
, /* Some sort of problem */
115 S_SINGLEREAD
, /* In read() */
116 S_SPECREAD
, /* Speculative read (for future read()) */
117 S_STREAMING
/* Streaming data */
121 * Tracking of streaming I/O buffers.
123 struct cafe_sio_buffer
{
124 struct list_head list
;
125 struct v4l2_buffer v4lbuf
;
126 char *buffer
; /* Where it lives in kernel space */
128 struct cafe_camera
*cam
;
132 * A description of one of our devices.
133 * Locking: controlled by s_mutex. Certain fields, however, require
134 * the dev_lock spinlock; they are marked as such by comments.
135 * dev_lock is also required for access to device registers.
139 enum cafe_state state
;
140 unsigned long flags
; /* Buffer status, mainly (dev_lock) */
141 int users
; /* How many open FDs */
142 struct file
*owner
; /* Who has data access (v4l2) */
145 * Subsystem structures.
147 struct pci_dev
*pdev
;
148 struct video_device v4ldev
;
149 struct i2c_adapter i2c_adapter
;
150 struct i2c_client
*sensor
;
152 unsigned char __iomem
*regs
;
153 struct list_head dev_list
; /* link to other devices */
156 unsigned int nbufs
; /* How many are alloc'd */
157 int next_buf
; /* Next to consume (dev_lock) */
158 unsigned int dma_buf_size
; /* allocated size */
159 void *dma_bufs
[MAX_DMA_BUFS
]; /* Internal buffer addresses */
160 dma_addr_t dma_handles
[MAX_DMA_BUFS
]; /* Buffer bus addresses */
161 unsigned int specframes
; /* Unconsumed spec frames (dev_lock) */
162 unsigned int sequence
; /* Frame sequence number */
163 unsigned int buf_seq
[MAX_DMA_BUFS
]; /* Sequence for individual buffers */
165 /* Streaming buffers */
166 unsigned int n_sbufs
; /* How many we have */
167 struct cafe_sio_buffer
*sb_bufs
; /* The array of housekeeping structs */
168 struct list_head sb_avail
; /* Available for data (we own) (dev_lock) */
169 struct list_head sb_full
; /* With data (user space owns) (dev_lock) */
170 struct tasklet_struct s_tasklet
;
172 /* Current operating parameters */
173 u32 sensor_type
; /* Currently ov7670 only */
174 struct v4l2_pix_format pix_format
;
177 struct mutex s_mutex
; /* Access to this structure */
178 spinlock_t dev_lock
; /* Access to device */
181 wait_queue_head_t smbus_wait
; /* Waiting on i2c events */
182 wait_queue_head_t iowait
; /* Waiting on frame data */
183 #ifdef CONFIG_VIDEO_ADV_DEBUG
184 struct dentry
*dfs_regs
;
185 struct dentry
*dfs_cam_regs
;
190 * Status flags. Always manipulated with bit operations.
192 #define CF_BUF0_VALID 0 /* Buffers valid - first three */
193 #define CF_BUF1_VALID 1
194 #define CF_BUF2_VALID 2
195 #define CF_DMA_ACTIVE 3 /* A frame is incoming */
196 #define CF_CONFIG_NEEDED 4 /* Must configure hardware */
201 * Start over with DMA buffers - dev_lock needed.
203 static void cafe_reset_buffers(struct cafe_camera
*cam
)
208 for (i
= 0; i
< cam
->nbufs
; i
++)
209 clear_bit(i
, &cam
->flags
);
213 static inline int cafe_needs_config(struct cafe_camera
*cam
)
215 return test_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
218 static void cafe_set_config_needed(struct cafe_camera
*cam
, int needed
)
221 set_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
223 clear_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
230 * Debugging and related.
232 #define cam_err(cam, fmt, arg...) \
233 dev_err(&(cam)->pdev->dev, fmt, ##arg);
234 #define cam_warn(cam, fmt, arg...) \
235 dev_warn(&(cam)->pdev->dev, fmt, ##arg);
236 #define cam_dbg(cam, fmt, arg...) \
237 dev_dbg(&(cam)->pdev->dev, fmt, ##arg);
240 /* ---------------------------------------------------------------------*/
242 * We keep a simple list of known devices to search at open time.
244 static LIST_HEAD(cafe_dev_list
);
245 static DEFINE_MUTEX(cafe_dev_list_lock
);
247 static void cafe_add_dev(struct cafe_camera
*cam
)
249 mutex_lock(&cafe_dev_list_lock
);
250 list_add_tail(&cam
->dev_list
, &cafe_dev_list
);
251 mutex_unlock(&cafe_dev_list_lock
);
254 static void cafe_remove_dev(struct cafe_camera
*cam
)
256 mutex_lock(&cafe_dev_list_lock
);
257 list_del(&cam
->dev_list
);
258 mutex_unlock(&cafe_dev_list_lock
);
261 static struct cafe_camera
*cafe_find_dev(int minor
)
263 struct cafe_camera
*cam
;
265 mutex_lock(&cafe_dev_list_lock
);
266 list_for_each_entry(cam
, &cafe_dev_list
, dev_list
) {
267 if (cam
->v4ldev
.minor
== minor
)
272 mutex_unlock(&cafe_dev_list_lock
);
277 static struct cafe_camera
*cafe_find_by_pdev(struct pci_dev
*pdev
)
279 struct cafe_camera
*cam
;
281 mutex_lock(&cafe_dev_list_lock
);
282 list_for_each_entry(cam
, &cafe_dev_list
, dev_list
) {
283 if (cam
->pdev
== pdev
)
288 mutex_unlock(&cafe_dev_list_lock
);
293 /* ------------------------------------------------------------------------ */
295 * Device register I/O
297 static inline void cafe_reg_write(struct cafe_camera
*cam
, unsigned int reg
,
300 iowrite32(val
, cam
->regs
+ reg
);
303 static inline unsigned int cafe_reg_read(struct cafe_camera
*cam
,
306 return ioread32(cam
->regs
+ reg
);
310 static inline void cafe_reg_write_mask(struct cafe_camera
*cam
, unsigned int reg
,
311 unsigned int val
, unsigned int mask
)
313 unsigned int v
= cafe_reg_read(cam
, reg
);
315 v
= (v
& ~mask
) | (val
& mask
);
316 cafe_reg_write(cam
, reg
, v
);
319 static inline void cafe_reg_clear_bit(struct cafe_camera
*cam
,
320 unsigned int reg
, unsigned int val
)
322 cafe_reg_write_mask(cam
, reg
, 0, val
);
325 static inline void cafe_reg_set_bit(struct cafe_camera
*cam
,
326 unsigned int reg
, unsigned int val
)
328 cafe_reg_write_mask(cam
, reg
, val
, val
);
333 /* -------------------------------------------------------------------- */
335 * The I2C/SMBUS interface to the camera itself starts here. The
336 * controller handles SMBUS itself, presenting a relatively simple register
337 * interface; all we have to do is to tell it where to route the data.
339 #define CAFE_SMBUS_TIMEOUT (HZ) /* generous */
341 static int cafe_smbus_write_done(struct cafe_camera
*cam
)
347 * We must delay after the interrupt, or the controller gets confused
348 * and never does give us good status. Fortunately, we don't do this
352 spin_lock_irqsave(&cam
->dev_lock
, flags
);
353 c1
= cafe_reg_read(cam
, REG_TWSIC1
);
354 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
355 return (c1
& (TWSIC1_WSTAT
|TWSIC1_ERROR
)) != TWSIC1_WSTAT
;
358 static int cafe_smbus_write_data(struct cafe_camera
*cam
,
359 u16 addr
, u8 command
, u8 value
)
363 DEFINE_WAIT(the_wait
);
365 spin_lock_irqsave(&cam
->dev_lock
, flags
);
366 rval
= TWSIC0_EN
| ((addr
<< TWSIC0_SID_SHIFT
) & TWSIC0_SID
);
367 rval
|= TWSIC0_OVMAGIC
; /* Make OV sensors work */
369 * Marvell sez set clkdiv to all 1's for now.
371 rval
|= TWSIC0_CLKDIV
;
372 cafe_reg_write(cam
, REG_TWSIC0
, rval
);
373 (void) cafe_reg_read(cam
, REG_TWSIC1
); /* force write */
374 rval
= value
| ((command
<< TWSIC1_ADDR_SHIFT
) & TWSIC1_ADDR
);
375 cafe_reg_write(cam
, REG_TWSIC1
, rval
);
376 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
379 * Time to wait for the write to complete. THIS IS A RACY
380 * WAY TO DO IT, but the sad fact is that reading the TWSIC1
381 * register too quickly after starting the operation sends
382 * the device into a place that may be kinder and better, but
383 * which is absolutely useless for controlling the sensor. In
384 * practice we have plenty of time to get into our sleep state
385 * before the interrupt hits, and the worst case is that we
386 * time out and then see that things completed, so this seems
387 * the best way for now.
390 prepare_to_wait(&cam
->smbus_wait
, &the_wait
,
391 TASK_UNINTERRUPTIBLE
);
392 schedule_timeout(1); /* even 1 jiffy is too long */
393 finish_wait(&cam
->smbus_wait
, &the_wait
);
394 } while (!cafe_smbus_write_done(cam
));
396 #ifdef IF_THE_CAFE_HARDWARE_WORKED_RIGHT
397 wait_event_timeout(cam
->smbus_wait
, cafe_smbus_write_done(cam
),
400 spin_lock_irqsave(&cam
->dev_lock
, flags
);
401 rval
= cafe_reg_read(cam
, REG_TWSIC1
);
402 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
404 if (rval
& TWSIC1_WSTAT
) {
405 cam_err(cam
, "SMBUS write (%02x/%02x/%02x) timed out\n", addr
,
409 if (rval
& TWSIC1_ERROR
) {
410 cam_err(cam
, "SMBUS write (%02x/%02x/%02x) error\n", addr
,
419 static int cafe_smbus_read_done(struct cafe_camera
*cam
)
425 * We must delay after the interrupt, or the controller gets confused
426 * and never does give us good status. Fortunately, we don't do this
430 spin_lock_irqsave(&cam
->dev_lock
, flags
);
431 c1
= cafe_reg_read(cam
, REG_TWSIC1
);
432 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
433 return c1
& (TWSIC1_RVALID
|TWSIC1_ERROR
);
438 static int cafe_smbus_read_data(struct cafe_camera
*cam
,
439 u16 addr
, u8 command
, u8
*value
)
444 spin_lock_irqsave(&cam
->dev_lock
, flags
);
445 rval
= TWSIC0_EN
| ((addr
<< TWSIC0_SID_SHIFT
) & TWSIC0_SID
);
446 rval
|= TWSIC0_OVMAGIC
; /* Make OV sensors work */
448 * Marvel sez set clkdiv to all 1's for now.
450 rval
|= TWSIC0_CLKDIV
;
451 cafe_reg_write(cam
, REG_TWSIC0
, rval
);
452 (void) cafe_reg_read(cam
, REG_TWSIC1
); /* force write */
453 rval
= TWSIC1_READ
| ((command
<< TWSIC1_ADDR_SHIFT
) & TWSIC1_ADDR
);
454 cafe_reg_write(cam
, REG_TWSIC1
, rval
);
455 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
457 wait_event_timeout(cam
->smbus_wait
,
458 cafe_smbus_read_done(cam
), CAFE_SMBUS_TIMEOUT
);
459 spin_lock_irqsave(&cam
->dev_lock
, flags
);
460 rval
= cafe_reg_read(cam
, REG_TWSIC1
);
461 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
463 if (rval
& TWSIC1_ERROR
) {
464 cam_err(cam
, "SMBUS read (%02x/%02x) error\n", addr
, command
);
467 if (! (rval
& TWSIC1_RVALID
)) {
468 cam_err(cam
, "SMBUS read (%02x/%02x) timed out\n", addr
,
472 *value
= rval
& 0xff;
477 * Perform a transfer over SMBUS. This thing is called under
478 * the i2c bus lock, so we shouldn't race with ourselves...
480 static int cafe_smbus_xfer(struct i2c_adapter
*adapter
, u16 addr
,
481 unsigned short flags
, char rw
, u8 command
,
482 int size
, union i2c_smbus_data
*data
)
484 struct cafe_camera
*cam
= i2c_get_adapdata(adapter
);
488 * Refuse to talk to anything but OV cam chips. We should
489 * never even see an attempt to do so, but one never knows.
491 if (cam
->sensor
&& addr
!= cam
->sensor
->addr
) {
492 cam_err(cam
, "funky smbus addr %d\n", addr
);
496 * This interface would appear to only do byte data ops. OK
497 * it can do word too, but the cam chip has no use for that.
499 if (size
!= I2C_SMBUS_BYTE_DATA
) {
500 cam_err(cam
, "funky xfer size %d\n", size
);
504 if (rw
== I2C_SMBUS_WRITE
)
505 ret
= cafe_smbus_write_data(cam
, addr
, command
, data
->byte
);
506 else if (rw
== I2C_SMBUS_READ
)
507 ret
= cafe_smbus_read_data(cam
, addr
, command
, &data
->byte
);
512 static void cafe_smbus_enable_irq(struct cafe_camera
*cam
)
516 spin_lock_irqsave(&cam
->dev_lock
, flags
);
517 cafe_reg_set_bit(cam
, REG_IRQMASK
, TWSIIRQS
);
518 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
521 static u32
cafe_smbus_func(struct i2c_adapter
*adapter
)
523 return I2C_FUNC_SMBUS_READ_BYTE_DATA
|
524 I2C_FUNC_SMBUS_WRITE_BYTE_DATA
;
527 static struct i2c_algorithm cafe_smbus_algo
= {
528 .smbus_xfer
= cafe_smbus_xfer
,
529 .functionality
= cafe_smbus_func
532 /* Somebody is on the bus */
533 static int cafe_cam_init(struct cafe_camera
*cam
);
534 static void cafe_ctlr_stop_dma(struct cafe_camera
*cam
);
535 static void cafe_ctlr_power_down(struct cafe_camera
*cam
);
537 static int cafe_smbus_attach(struct i2c_client
*client
)
539 struct cafe_camera
*cam
= i2c_get_adapdata(client
->adapter
);
542 * Don't talk to chips we don't recognize.
544 if (client
->driver
->id
== I2C_DRIVERID_OV7670
) {
545 cam
->sensor
= client
;
546 return cafe_cam_init(cam
);
551 static int cafe_smbus_detach(struct i2c_client
*client
)
553 struct cafe_camera
*cam
= i2c_get_adapdata(client
->adapter
);
555 if (cam
->sensor
== client
) {
556 cafe_ctlr_stop_dma(cam
);
557 cafe_ctlr_power_down(cam
);
558 cam_err(cam
, "lost the sensor!\n");
559 cam
->sensor
= NULL
; /* Bummer, no camera */
560 cam
->state
= S_NOTREADY
;
565 static int cafe_smbus_setup(struct cafe_camera
*cam
)
567 struct i2c_adapter
*adap
= &cam
->i2c_adapter
;
570 cafe_smbus_enable_irq(cam
);
571 adap
->id
= I2C_HW_SMBUS_CAFE
;
572 adap
->class = I2C_CLASS_CAM_DIGITAL
;
573 adap
->owner
= THIS_MODULE
;
574 adap
->client_register
= cafe_smbus_attach
;
575 adap
->client_unregister
= cafe_smbus_detach
;
576 adap
->algo
= &cafe_smbus_algo
;
577 strcpy(adap
->name
, "cafe_ccic");
578 adap
->dev
.parent
= &cam
->pdev
->dev
;
579 i2c_set_adapdata(adap
, cam
);
580 ret
= i2c_add_adapter(adap
);
582 printk(KERN_ERR
"Unable to register cafe i2c adapter\n");
586 static void cafe_smbus_shutdown(struct cafe_camera
*cam
)
588 i2c_del_adapter(&cam
->i2c_adapter
);
592 /* ------------------------------------------------------------------- */
594 * Deal with the controller.
598 * Do everything we think we need to have the interface operating
599 * according to the desired format.
601 static void cafe_ctlr_dma(struct cafe_camera
*cam
)
604 * Store the first two Y buffers (we aren't supporting
605 * planar formats for now, so no UV bufs). Then either
606 * set the third if it exists, or tell the controller
609 cafe_reg_write(cam
, REG_Y0BAR
, cam
->dma_handles
[0]);
610 cafe_reg_write(cam
, REG_Y1BAR
, cam
->dma_handles
[1]);
611 if (cam
->nbufs
> 2) {
612 cafe_reg_write(cam
, REG_Y2BAR
, cam
->dma_handles
[2]);
613 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_TWOBUFS
);
616 cafe_reg_set_bit(cam
, REG_CTRL1
, C1_TWOBUFS
);
617 cafe_reg_write(cam
, REG_UBAR
, 0); /* 32 bits only for now */
620 static void cafe_ctlr_image(struct cafe_camera
*cam
)
623 struct v4l2_pix_format
*fmt
= &cam
->pix_format
;
625 imgsz
= ((fmt
->height
<< IMGSZ_V_SHIFT
) & IMGSZ_V_MASK
) |
626 (fmt
->bytesperline
& IMGSZ_H_MASK
);
627 cafe_reg_write(cam
, REG_IMGSIZE
, imgsz
);
628 cafe_reg_write(cam
, REG_IMGOFFSET
, 0);
629 /* YPITCH just drops the last two bits */
630 cafe_reg_write_mask(cam
, REG_IMGPITCH
, fmt
->bytesperline
,
633 * Tell the controller about the image format we are using.
635 switch (cam
->pix_format
.pixelformat
) {
636 case V4L2_PIX_FMT_YUYV
:
637 cafe_reg_write_mask(cam
, REG_CTRL0
,
638 C0_DF_YUV
|C0_YUV_PACKED
|C0_YUVE_YUYV
,
642 case V4L2_PIX_FMT_RGB444
:
643 cafe_reg_write_mask(cam
, REG_CTRL0
,
644 C0_DF_RGB
|C0_RGBF_444
|C0_RGB4_XRGB
,
649 case V4L2_PIX_FMT_RGB565
:
650 cafe_reg_write_mask(cam
, REG_CTRL0
,
651 C0_DF_RGB
|C0_RGBF_565
|C0_RGB5_BGGR
,
656 cam_err(cam
, "Unknown format %x\n", cam
->pix_format
.pixelformat
);
660 * Make sure it knows we want to use hsync/vsync.
662 cafe_reg_write_mask(cam
, REG_CTRL0
, C0_SIF_HVSYNC
,
668 * Configure the controller for operation; caller holds the
671 static int cafe_ctlr_configure(struct cafe_camera
*cam
)
675 spin_lock_irqsave(&cam
->dev_lock
, flags
);
677 cafe_ctlr_image(cam
);
678 cafe_set_config_needed(cam
, 0);
679 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
683 static void cafe_ctlr_irq_enable(struct cafe_camera
*cam
)
686 * Clear any pending interrupts, since we do not
687 * expect to have I/O active prior to enabling.
689 cafe_reg_write(cam
, REG_IRQSTAT
, FRAMEIRQS
);
690 cafe_reg_set_bit(cam
, REG_IRQMASK
, FRAMEIRQS
);
693 static void cafe_ctlr_irq_disable(struct cafe_camera
*cam
)
695 cafe_reg_clear_bit(cam
, REG_IRQMASK
, FRAMEIRQS
);
699 * Make the controller start grabbing images. Everything must
700 * be set up before doing this.
702 static void cafe_ctlr_start(struct cafe_camera
*cam
)
704 /* set_bit performs a read, so no other barrier should be
706 cafe_reg_set_bit(cam
, REG_CTRL0
, C0_ENABLE
);
709 static void cafe_ctlr_stop(struct cafe_camera
*cam
)
711 cafe_reg_clear_bit(cam
, REG_CTRL0
, C0_ENABLE
);
714 static void cafe_ctlr_init(struct cafe_camera
*cam
)
718 spin_lock_irqsave(&cam
->dev_lock
, flags
);
720 * Added magic to bring up the hardware on the B-Test board
722 cafe_reg_write(cam
, 0x3038, 0x8);
723 cafe_reg_write(cam
, 0x315c, 0x80008);
725 * Go through the dance needed to wake the device up.
726 * Note that these registers are global and shared
727 * with the NAND and SD devices. Interaction between the
728 * three still needs to be examined.
730 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRS
|GCSR_MRS
); /* Needed? */
731 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRC
|GCSR_MRC
);
732 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_SRC
|GCSR_MRS
);
734 * Here we must wait a bit for the controller to come around.
736 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
738 spin_lock_irqsave(&cam
->dev_lock
, flags
);
740 cafe_reg_write(cam
, REG_GL_CSR
, GCSR_CCIC_EN
|GCSR_SRC
|GCSR_MRC
);
741 cafe_reg_set_bit(cam
, REG_GL_IMASK
, GIMSK_CCIC_EN
);
743 * Make sure it's not powered down.
745 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
747 * Turn off the enable bit. It sure should be off anyway,
748 * but it's good to be sure.
750 cafe_reg_clear_bit(cam
, REG_CTRL0
, C0_ENABLE
);
752 * Mask all interrupts.
754 cafe_reg_write(cam
, REG_IRQMASK
, 0);
756 * Clock the sensor appropriately. Controller clock should
757 * be 48MHz, sensor "typical" value is half that.
759 cafe_reg_write_mask(cam
, REG_CLKCTRL
, 2, CLK_DIV_MASK
);
760 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
765 * Stop the controller, and don't return until we're really sure that no
766 * further DMA is going on.
768 static void cafe_ctlr_stop_dma(struct cafe_camera
*cam
)
773 * Theory: stop the camera controller (whether it is operating
774 * or not). Delay briefly just in case we race with the SOF
775 * interrupt, then wait until no DMA is active.
777 spin_lock_irqsave(&cam
->dev_lock
, flags
);
779 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
781 wait_event_timeout(cam
->iowait
,
782 !test_bit(CF_DMA_ACTIVE
, &cam
->flags
), HZ
);
783 if (test_bit(CF_DMA_ACTIVE
, &cam
->flags
))
784 cam_err(cam
, "Timeout waiting for DMA to end\n");
785 /* This would be bad news - what now? */
786 spin_lock_irqsave(&cam
->dev_lock
, flags
);
788 cafe_ctlr_irq_disable(cam
);
789 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
795 static void cafe_ctlr_power_up(struct cafe_camera
*cam
)
799 spin_lock_irqsave(&cam
->dev_lock
, flags
);
800 cafe_reg_clear_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
802 * Part one of the sensor dance: turn the global
805 cafe_reg_write(cam
, REG_GL_FCR
, GFCR_GPIO_ON
);
806 cafe_reg_write(cam
, REG_GL_GPIOR
, GGPIO_OUT
|GGPIO_VAL
);
808 * Put the sensor into operational mode (assumes OLPC-style
809 * wiring). Control 0 is reset - set to 1 to operate.
810 * Control 1 is power down, set to 0 to operate.
812 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
); /* pwr up, reset */
813 // mdelay(1); /* Marvell says 1ms will do it */
814 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
|GPR_C0
);
815 // mdelay(1); /* Enough? */
816 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
817 msleep(5); /* Just to be sure */
820 static void cafe_ctlr_power_down(struct cafe_camera
*cam
)
824 spin_lock_irqsave(&cam
->dev_lock
, flags
);
825 cafe_reg_write(cam
, REG_GPR
, GPR_C1EN
|GPR_C0EN
|GPR_C1
);
826 cafe_reg_write(cam
, REG_GL_FCR
, GFCR_GPIO_ON
);
827 cafe_reg_write(cam
, REG_GL_GPIOR
, GGPIO_OUT
);
828 cafe_reg_set_bit(cam
, REG_CTRL1
, C1_PWRDWN
);
829 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
832 /* -------------------------------------------------------------------- */
834 * Communications with the sensor.
837 static int __cafe_cam_cmd(struct cafe_camera
*cam
, int cmd
, void *arg
)
839 struct i2c_client
*sc
= cam
->sensor
;
842 if (sc
== NULL
|| sc
->driver
== NULL
|| sc
->driver
->command
== NULL
)
844 ret
= sc
->driver
->command(sc
, cmd
, arg
);
845 if (ret
== -EPERM
) /* Unsupported command */
850 static int __cafe_cam_reset(struct cafe_camera
*cam
)
853 return __cafe_cam_cmd(cam
, VIDIOC_INT_RESET
, &zero
);
857 * We have found the sensor on the i2c. Let's try to have a
860 static int cafe_cam_init(struct cafe_camera
*cam
)
862 struct v4l2_chip_ident chip
= { V4L2_CHIP_MATCH_I2C_ADDR
, 0, 0, 0 };
865 mutex_lock(&cam
->s_mutex
);
866 if (cam
->state
!= S_NOTREADY
)
867 cam_warn(cam
, "Cam init with device in funky state %d",
869 ret
= __cafe_cam_reset(cam
);
872 chip
.match_chip
= cam
->sensor
->addr
;
873 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_CHIP_IDENT
, &chip
);
876 cam
->sensor_type
= chip
.ident
;
877 // if (cam->sensor->addr != OV7xx0_SID) {
878 if (cam
->sensor_type
!= V4L2_IDENT_OV7670
) {
879 cam_err(cam
, "Unsupported sensor type %d", cam
->sensor
->addr
);
883 /* Get/set parameters? */
887 cafe_ctlr_power_down(cam
);
888 mutex_unlock(&cam
->s_mutex
);
893 * Configure the sensor to match the parameters we have. Caller should
896 static int cafe_cam_set_flip(struct cafe_camera
*cam
)
898 struct v4l2_control ctrl
;
900 memset(&ctrl
, 0, sizeof(ctrl
));
901 ctrl
.id
= V4L2_CID_VFLIP
;
903 return __cafe_cam_cmd(cam
, VIDIOC_S_CTRL
, &ctrl
);
907 static int cafe_cam_configure(struct cafe_camera
*cam
)
909 struct v4l2_format fmt
;
912 if (cam
->state
!= S_IDLE
)
914 fmt
.fmt
.pix
= cam
->pix_format
;
915 ret
= __cafe_cam_cmd(cam
, VIDIOC_INT_INIT
, &zero
);
917 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_FMT
, &fmt
);
919 * OV7670 does weird things if flip is set *before* format...
921 ret
+= cafe_cam_set_flip(cam
);
925 /* -------------------------------------------------------------------- */
927 * DMA buffer management. These functions need s_mutex held.
930 /* FIXME: this is inefficient as hell, since dma_alloc_coherent just
931 * does a get_free_pages() call, and we waste a good chunk of an orderN
932 * allocation. Should try to allocate the whole set in one chunk.
934 static int cafe_alloc_dma_bufs(struct cafe_camera
*cam
, int loadtime
)
938 cafe_set_config_needed(cam
, 1);
940 cam
->dma_buf_size
= dma_buf_size
;
942 cam
->dma_buf_size
= cam
->pix_format
.sizeimage
;
947 for (i
= 0; i
< n_dma_bufs
; i
++) {
948 cam
->dma_bufs
[i
] = dma_alloc_coherent(&cam
->pdev
->dev
,
949 cam
->dma_buf_size
, cam
->dma_handles
+ i
,
951 if (cam
->dma_bufs
[i
] == NULL
) {
952 cam_warn(cam
, "Failed to allocate DMA buffer\n");
955 /* For debug, remove eventually */
956 memset(cam
->dma_bufs
[i
], 0xcc, cam
->dma_buf_size
);
960 switch (cam
->nbufs
) {
962 dma_free_coherent(&cam
->pdev
->dev
, cam
->dma_buf_size
,
963 cam
->dma_bufs
[0], cam
->dma_handles
[0]);
966 cam_err(cam
, "Insufficient DMA buffers, cannot operate\n");
971 cam_warn(cam
, "Will limp along with only 2 buffers\n");
977 static void cafe_free_dma_bufs(struct cafe_camera
*cam
)
981 for (i
= 0; i
< cam
->nbufs
; i
++) {
982 dma_free_coherent(&cam
->pdev
->dev
, cam
->dma_buf_size
,
983 cam
->dma_bufs
[i
], cam
->dma_handles
[i
]);
984 cam
->dma_bufs
[i
] = NULL
;
993 /* ----------------------------------------------------------------------- */
995 * Here starts the V4L2 interface code.
999 * Read an image from the device.
1001 static ssize_t
cafe_deliver_buffer(struct cafe_camera
*cam
,
1002 char __user
*buffer
, size_t len
, loff_t
*pos
)
1005 unsigned long flags
;
1007 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1008 if (cam
->next_buf
< 0) {
1009 cam_err(cam
, "deliver_buffer: No next buffer\n");
1010 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1013 bufno
= cam
->next_buf
;
1014 clear_bit(bufno
, &cam
->flags
);
1015 if (++(cam
->next_buf
) >= cam
->nbufs
)
1017 if (! test_bit(cam
->next_buf
, &cam
->flags
))
1019 cam
->specframes
= 0;
1020 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1022 if (len
> cam
->pix_format
.sizeimage
)
1023 len
= cam
->pix_format
.sizeimage
;
1024 if (copy_to_user(buffer
, cam
->dma_bufs
[bufno
], len
))
1031 * Get everything ready, and start grabbing frames.
1033 static int cafe_read_setup(struct cafe_camera
*cam
, enum cafe_state state
)
1036 unsigned long flags
;
1039 * Configuration. If we still don't have DMA buffers,
1040 * make one last, desperate attempt.
1042 if (cam
->nbufs
== 0)
1043 if (cafe_alloc_dma_bufs(cam
, 0))
1046 if (cafe_needs_config(cam
)) {
1047 cafe_cam_configure(cam
);
1048 ret
= cafe_ctlr_configure(cam
);
1056 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1057 cafe_reset_buffers(cam
);
1058 cafe_ctlr_irq_enable(cam
);
1060 cafe_ctlr_start(cam
);
1061 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1066 static ssize_t
cafe_v4l_read(struct file
*filp
,
1067 char __user
*buffer
, size_t len
, loff_t
*pos
)
1069 struct cafe_camera
*cam
= filp
->private_data
;
1073 * Perhaps we're in speculative read mode and already
1076 mutex_lock(&cam
->s_mutex
);
1077 if (cam
->state
== S_SPECREAD
) {
1078 if (cam
->next_buf
>= 0) {
1079 ret
= cafe_deliver_buffer(cam
, buffer
, len
, pos
);
1083 } else if (cam
->state
== S_FLAKED
|| cam
->state
== S_NOTREADY
) {
1086 } else if (cam
->state
!= S_IDLE
) {
1092 * v4l2: multiple processes can open the device, but only
1093 * one gets to grab data from it.
1095 if (cam
->owner
&& cam
->owner
!= filp
) {
1102 * Do setup if need be.
1104 if (cam
->state
!= S_SPECREAD
) {
1105 ret
= cafe_read_setup(cam
, S_SINGLEREAD
);
1110 * Wait for something to happen. This should probably
1111 * be interruptible (FIXME).
1113 wait_event_timeout(cam
->iowait
, cam
->next_buf
>= 0, HZ
);
1114 if (cam
->next_buf
< 0) {
1115 cam_err(cam
, "read() operation timed out\n");
1116 cafe_ctlr_stop_dma(cam
);
1121 * Give them their data and we should be done.
1123 ret
= cafe_deliver_buffer(cam
, buffer
, len
, pos
);
1126 mutex_unlock(&cam
->s_mutex
);
1138 * Streaming I/O support.
1143 static int cafe_vidioc_streamon(struct file
*filp
, void *priv
,
1144 enum v4l2_buf_type type
)
1146 struct cafe_camera
*cam
= filp
->private_data
;
1149 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1151 mutex_lock(&cam
->s_mutex
);
1152 if (cam
->state
!= S_IDLE
|| cam
->n_sbufs
== 0)
1156 ret
= cafe_read_setup(cam
, S_STREAMING
);
1159 mutex_unlock(&cam
->s_mutex
);
1165 static int cafe_vidioc_streamoff(struct file
*filp
, void *priv
,
1166 enum v4l2_buf_type type
)
1168 struct cafe_camera
*cam
= filp
->private_data
;
1171 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1173 mutex_lock(&cam
->s_mutex
);
1174 if (cam
->state
!= S_STREAMING
)
1177 cafe_ctlr_stop_dma(cam
);
1181 mutex_unlock(&cam
->s_mutex
);
1188 static int cafe_setup_siobuf(struct cafe_camera
*cam
, int index
)
1190 struct cafe_sio_buffer
*buf
= cam
->sb_bufs
+ index
;
1192 INIT_LIST_HEAD(&buf
->list
);
1193 buf
->v4lbuf
.length
= PAGE_ALIGN(cam
->pix_format
.sizeimage
);
1194 buf
->buffer
= vmalloc_user(buf
->v4lbuf
.length
);
1195 if (buf
->buffer
== NULL
)
1200 buf
->v4lbuf
.index
= index
;
1201 buf
->v4lbuf
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1202 buf
->v4lbuf
.field
= V4L2_FIELD_NONE
;
1203 buf
->v4lbuf
.memory
= V4L2_MEMORY_MMAP
;
1205 * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg
1206 * just uses the length times the index, but the spec warns
1207 * against doing just that - vma merging problems. So we
1208 * leave a gap between each pair of buffers.
1210 buf
->v4lbuf
.m
.offset
= 2*index
*buf
->v4lbuf
.length
;
1214 static int cafe_free_sio_buffers(struct cafe_camera
*cam
)
1219 * If any buffers are mapped, we cannot free them at all.
1221 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1222 if (cam
->sb_bufs
[i
].mapcount
> 0)
1227 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1228 vfree(cam
->sb_bufs
[i
].buffer
);
1230 kfree(cam
->sb_bufs
);
1231 cam
->sb_bufs
= NULL
;
1232 INIT_LIST_HEAD(&cam
->sb_avail
);
1233 INIT_LIST_HEAD(&cam
->sb_full
);
1239 static int cafe_vidioc_reqbufs(struct file
*filp
, void *priv
,
1240 struct v4l2_requestbuffers
*req
)
1242 struct cafe_camera
*cam
= filp
->private_data
;
1243 int ret
= 0; /* Silence warning */
1246 * Make sure it's something we can do. User pointers could be
1247 * implemented without great pain, but that's not been done yet.
1249 if (req
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1251 if (req
->memory
!= V4L2_MEMORY_MMAP
)
1254 * If they ask for zero buffers, they really want us to stop streaming
1255 * (if it's happening) and free everything. Should we check owner?
1257 mutex_lock(&cam
->s_mutex
);
1258 if (req
->count
== 0) {
1259 if (cam
->state
== S_STREAMING
)
1260 cafe_ctlr_stop_dma(cam
);
1261 ret
= cafe_free_sio_buffers (cam
);
1265 * Device needs to be idle and working. We *could* try to do the
1266 * right thing in S_SPECREAD by shutting things down, but it
1267 * probably doesn't matter.
1269 if (cam
->state
!= S_IDLE
|| (cam
->owner
&& cam
->owner
!= filp
)) {
1275 if (req
->count
< min_buffers
)
1276 req
->count
= min_buffers
;
1277 else if (req
->count
> max_buffers
)
1278 req
->count
= max_buffers
;
1279 if (cam
->n_sbufs
> 0) {
1280 ret
= cafe_free_sio_buffers(cam
);
1285 cam
->sb_bufs
= kzalloc(req
->count
*sizeof(struct cafe_sio_buffer
),
1287 if (cam
->sb_bufs
== NULL
) {
1291 for (cam
->n_sbufs
= 0; cam
->n_sbufs
< req
->count
; (cam
->n_sbufs
++)) {
1292 ret
= cafe_setup_siobuf(cam
, cam
->n_sbufs
);
1297 if (cam
->n_sbufs
== 0) /* no luck at all - ret already set */
1298 kfree(cam
->sb_bufs
);
1299 req
->count
= cam
->n_sbufs
; /* In case of partial success */
1302 mutex_unlock(&cam
->s_mutex
);
1307 static int cafe_vidioc_querybuf(struct file
*filp
, void *priv
,
1308 struct v4l2_buffer
*buf
)
1310 struct cafe_camera
*cam
= filp
->private_data
;
1313 mutex_lock(&cam
->s_mutex
);
1314 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1316 if (buf
->index
< 0 || buf
->index
>= cam
->n_sbufs
)
1318 *buf
= cam
->sb_bufs
[buf
->index
].v4lbuf
;
1321 mutex_unlock(&cam
->s_mutex
);
1325 static int cafe_vidioc_qbuf(struct file
*filp
, void *priv
,
1326 struct v4l2_buffer
*buf
)
1328 struct cafe_camera
*cam
= filp
->private_data
;
1329 struct cafe_sio_buffer
*sbuf
;
1331 unsigned long flags
;
1333 mutex_lock(&cam
->s_mutex
);
1334 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1336 if (buf
->index
< 0 || buf
->index
>= cam
->n_sbufs
)
1338 sbuf
= cam
->sb_bufs
+ buf
->index
;
1339 if (sbuf
->v4lbuf
.flags
& V4L2_BUF_FLAG_QUEUED
) {
1340 ret
= 0; /* Already queued?? */
1343 if (sbuf
->v4lbuf
.flags
& V4L2_BUF_FLAG_DONE
) {
1344 /* Spec doesn't say anything, seems appropriate tho */
1348 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_QUEUED
;
1349 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1350 list_add(&sbuf
->list
, &cam
->sb_avail
);
1351 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1354 mutex_unlock(&cam
->s_mutex
);
1358 static int cafe_vidioc_dqbuf(struct file
*filp
, void *priv
,
1359 struct v4l2_buffer
*buf
)
1361 struct cafe_camera
*cam
= filp
->private_data
;
1362 struct cafe_sio_buffer
*sbuf
;
1364 unsigned long flags
;
1366 mutex_lock(&cam
->s_mutex
);
1367 if (buf
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1369 if (cam
->state
!= S_STREAMING
)
1371 if (list_empty(&cam
->sb_full
) && filp
->f_flags
& O_NONBLOCK
) {
1376 while (list_empty(&cam
->sb_full
) && cam
->state
== S_STREAMING
) {
1377 mutex_unlock(&cam
->s_mutex
);
1378 if (wait_event_interruptible(cam
->iowait
,
1379 !list_empty(&cam
->sb_full
))) {
1383 mutex_lock(&cam
->s_mutex
);
1386 if (cam
->state
!= S_STREAMING
)
1389 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1390 /* Should probably recheck !list_empty() here */
1391 sbuf
= list_entry(cam
->sb_full
.next
,
1392 struct cafe_sio_buffer
, list
);
1393 list_del_init(&sbuf
->list
);
1394 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1395 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_DONE
;
1396 *buf
= sbuf
->v4lbuf
;
1401 mutex_unlock(&cam
->s_mutex
);
1408 static void cafe_v4l_vm_open(struct vm_area_struct
*vma
)
1410 struct cafe_sio_buffer
*sbuf
= vma
->vm_private_data
;
1412 * Locking: done under mmap_sem, so we don't need to
1413 * go back to the camera lock here.
1419 static void cafe_v4l_vm_close(struct vm_area_struct
*vma
)
1421 struct cafe_sio_buffer
*sbuf
= vma
->vm_private_data
;
1423 mutex_lock(&sbuf
->cam
->s_mutex
);
1425 /* Docs say we should stop I/O too... */
1426 if (sbuf
->mapcount
== 0)
1427 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_MAPPED
;
1428 mutex_unlock(&sbuf
->cam
->s_mutex
);
1431 static struct vm_operations_struct cafe_v4l_vm_ops
= {
1432 .open
= cafe_v4l_vm_open
,
1433 .close
= cafe_v4l_vm_close
1437 static int cafe_v4l_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
1439 struct cafe_camera
*cam
= filp
->private_data
;
1440 unsigned long offset
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1443 struct cafe_sio_buffer
*sbuf
= NULL
;
1445 if (! (vma
->vm_flags
& VM_WRITE
) || ! (vma
->vm_flags
& VM_SHARED
))
1448 * Find the buffer they are looking for.
1450 mutex_lock(&cam
->s_mutex
);
1451 for (i
= 0; i
< cam
->n_sbufs
; i
++)
1452 if (cam
->sb_bufs
[i
].v4lbuf
.m
.offset
== offset
) {
1453 sbuf
= cam
->sb_bufs
+ i
;
1459 ret
= remap_vmalloc_range(vma
, sbuf
->buffer
, 0);
1462 vma
->vm_flags
|= VM_DONTEXPAND
;
1463 vma
->vm_private_data
= sbuf
;
1464 vma
->vm_ops
= &cafe_v4l_vm_ops
;
1465 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_MAPPED
;
1466 cafe_v4l_vm_open(vma
);
1469 mutex_unlock(&cam
->s_mutex
);
1475 static int cafe_v4l_open(struct inode
*inode
, struct file
*filp
)
1477 struct cafe_camera
*cam
;
1479 cam
= cafe_find_dev(iminor(inode
));
1482 filp
->private_data
= cam
;
1484 mutex_lock(&cam
->s_mutex
);
1485 if (cam
->users
== 0) {
1486 cafe_ctlr_power_up(cam
);
1487 __cafe_cam_reset(cam
);
1488 cafe_set_config_needed(cam
, 1);
1489 /* FIXME make sure this is complete */
1492 mutex_unlock(&cam
->s_mutex
);
1497 static int cafe_v4l_release(struct inode
*inode
, struct file
*filp
)
1499 struct cafe_camera
*cam
= filp
->private_data
;
1501 mutex_lock(&cam
->s_mutex
);
1503 if (filp
== cam
->owner
) {
1504 cafe_ctlr_stop_dma(cam
);
1505 cafe_free_sio_buffers(cam
);
1508 if (cam
->users
== 0) {
1509 cafe_ctlr_power_down(cam
);
1510 if (alloc_bufs_at_read
)
1511 cafe_free_dma_bufs(cam
);
1513 mutex_unlock(&cam
->s_mutex
);
1519 static unsigned int cafe_v4l_poll(struct file
*filp
,
1520 struct poll_table_struct
*pt
)
1522 struct cafe_camera
*cam
= filp
->private_data
;
1524 poll_wait(filp
, &cam
->iowait
, pt
);
1525 if (cam
->next_buf
>= 0)
1526 return POLLIN
| POLLRDNORM
;
1532 static int cafe_vidioc_queryctrl(struct file
*filp
, void *priv
,
1533 struct v4l2_queryctrl
*qc
)
1535 struct cafe_camera
*cam
= filp
->private_data
;
1538 mutex_lock(&cam
->s_mutex
);
1539 ret
= __cafe_cam_cmd(cam
, VIDIOC_QUERYCTRL
, qc
);
1540 mutex_unlock(&cam
->s_mutex
);
1545 static int cafe_vidioc_g_ctrl(struct file
*filp
, void *priv
,
1546 struct v4l2_control
*ctrl
)
1548 struct cafe_camera
*cam
= filp
->private_data
;
1551 mutex_lock(&cam
->s_mutex
);
1552 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_CTRL
, ctrl
);
1553 mutex_unlock(&cam
->s_mutex
);
1558 static int cafe_vidioc_s_ctrl(struct file
*filp
, void *priv
,
1559 struct v4l2_control
*ctrl
)
1561 struct cafe_camera
*cam
= filp
->private_data
;
1564 mutex_lock(&cam
->s_mutex
);
1565 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_CTRL
, ctrl
);
1566 mutex_unlock(&cam
->s_mutex
);
1574 static int cafe_vidioc_querycap(struct file
*file
, void *priv
,
1575 struct v4l2_capability
*cap
)
1577 strcpy(cap
->driver
, "cafe_ccic");
1578 strcpy(cap
->card
, "cafe_ccic");
1579 cap
->version
= CAFE_VERSION
;
1580 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
|
1581 V4L2_CAP_READWRITE
| V4L2_CAP_STREAMING
;
1587 * The default format we use until somebody says otherwise.
1589 static struct v4l2_pix_format cafe_def_pix_format
= {
1591 .height
= VGA_HEIGHT
,
1592 .pixelformat
= V4L2_PIX_FMT_YUYV
,
1593 .field
= V4L2_FIELD_NONE
,
1594 .bytesperline
= VGA_WIDTH
*2,
1595 .sizeimage
= VGA_WIDTH
*VGA_HEIGHT
*2,
1598 static int cafe_vidioc_enum_fmt_vid_cap(struct file
*filp
,
1599 void *priv
, struct v4l2_fmtdesc
*fmt
)
1601 struct cafe_camera
*cam
= priv
;
1604 if (fmt
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1606 mutex_lock(&cam
->s_mutex
);
1607 ret
= __cafe_cam_cmd(cam
, VIDIOC_ENUM_FMT
, fmt
);
1608 mutex_unlock(&cam
->s_mutex
);
1613 static int cafe_vidioc_try_fmt_vid_cap(struct file
*filp
, void *priv
,
1614 struct v4l2_format
*fmt
)
1616 struct cafe_camera
*cam
= priv
;
1619 mutex_lock(&cam
->s_mutex
);
1620 ret
= __cafe_cam_cmd(cam
, VIDIOC_TRY_FMT
, fmt
);
1621 mutex_unlock(&cam
->s_mutex
);
1625 static int cafe_vidioc_s_fmt_vid_cap(struct file
*filp
, void *priv
,
1626 struct v4l2_format
*fmt
)
1628 struct cafe_camera
*cam
= priv
;
1632 * Can't do anything if the device is not idle
1633 * Also can't if there are streaming buffers in place.
1635 if (cam
->state
!= S_IDLE
|| cam
->n_sbufs
> 0)
1638 * See if the formatting works in principle.
1640 ret
= cafe_vidioc_try_fmt_vid_cap(filp
, priv
, fmt
);
1644 * Now we start to change things for real, so let's do it
1647 mutex_lock(&cam
->s_mutex
);
1648 cam
->pix_format
= fmt
->fmt
.pix
;
1650 * Make sure we have appropriate DMA buffers.
1653 if (cam
->nbufs
> 0 && cam
->dma_buf_size
< cam
->pix_format
.sizeimage
)
1654 cafe_free_dma_bufs(cam
);
1655 if (cam
->nbufs
== 0) {
1656 if (cafe_alloc_dma_bufs(cam
, 0))
1660 * It looks like this might work, so let's program the sensor.
1662 ret
= cafe_cam_configure(cam
);
1664 ret
= cafe_ctlr_configure(cam
);
1666 mutex_unlock(&cam
->s_mutex
);
1671 * Return our stored notion of how the camera is/should be configured.
1672 * The V4l2 spec wants us to be smarter, and actually get this from
1673 * the camera (and not mess with it at open time). Someday.
1675 static int cafe_vidioc_g_fmt_vid_cap(struct file
*filp
, void *priv
,
1676 struct v4l2_format
*f
)
1678 struct cafe_camera
*cam
= priv
;
1680 f
->fmt
.pix
= cam
->pix_format
;
1685 * We only have one input - the sensor - so minimize the nonsense here.
1687 static int cafe_vidioc_enum_input(struct file
*filp
, void *priv
,
1688 struct v4l2_input
*input
)
1690 if (input
->index
!= 0)
1693 input
->type
= V4L2_INPUT_TYPE_CAMERA
;
1694 input
->std
= V4L2_STD_ALL
; /* Not sure what should go here */
1695 strcpy(input
->name
, "Camera");
1699 static int cafe_vidioc_g_input(struct file
*filp
, void *priv
, unsigned int *i
)
1705 static int cafe_vidioc_s_input(struct file
*filp
, void *priv
, unsigned int i
)
1713 static int cafe_vidioc_s_std(struct file
*filp
, void *priv
, v4l2_std_id
*a
)
1719 * G/S_PARM. Most of this is done by the sensor, but we are
1720 * the level which controls the number of read buffers.
1722 static int cafe_vidioc_g_parm(struct file
*filp
, void *priv
,
1723 struct v4l2_streamparm
*parms
)
1725 struct cafe_camera
*cam
= priv
;
1728 mutex_lock(&cam
->s_mutex
);
1729 ret
= __cafe_cam_cmd(cam
, VIDIOC_G_PARM
, parms
);
1730 mutex_unlock(&cam
->s_mutex
);
1731 parms
->parm
.capture
.readbuffers
= n_dma_bufs
;
1735 static int cafe_vidioc_s_parm(struct file
*filp
, void *priv
,
1736 struct v4l2_streamparm
*parms
)
1738 struct cafe_camera
*cam
= priv
;
1741 mutex_lock(&cam
->s_mutex
);
1742 ret
= __cafe_cam_cmd(cam
, VIDIOC_S_PARM
, parms
);
1743 mutex_unlock(&cam
->s_mutex
);
1744 parms
->parm
.capture
.readbuffers
= n_dma_bufs
;
1749 static void cafe_v4l_dev_release(struct video_device
*vd
)
1751 struct cafe_camera
*cam
= container_of(vd
, struct cafe_camera
, v4ldev
);
1758 * This template device holds all of those v4l2 methods; we
1759 * clone it for specific real devices.
1762 static const struct file_operations cafe_v4l_fops
= {
1763 .owner
= THIS_MODULE
,
1764 .open
= cafe_v4l_open
,
1765 .release
= cafe_v4l_release
,
1766 .read
= cafe_v4l_read
,
1767 .poll
= cafe_v4l_poll
,
1768 .mmap
= cafe_v4l_mmap
,
1769 .ioctl
= video_ioctl2
,
1770 .llseek
= no_llseek
,
1773 static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops
= {
1774 .vidioc_querycap
= cafe_vidioc_querycap
,
1775 .vidioc_enum_fmt_vid_cap
= cafe_vidioc_enum_fmt_vid_cap
,
1776 .vidioc_try_fmt_vid_cap
= cafe_vidioc_try_fmt_vid_cap
,
1777 .vidioc_s_fmt_vid_cap
= cafe_vidioc_s_fmt_vid_cap
,
1778 .vidioc_g_fmt_vid_cap
= cafe_vidioc_g_fmt_vid_cap
,
1779 .vidioc_enum_input
= cafe_vidioc_enum_input
,
1780 .vidioc_g_input
= cafe_vidioc_g_input
,
1781 .vidioc_s_input
= cafe_vidioc_s_input
,
1782 .vidioc_s_std
= cafe_vidioc_s_std
,
1783 .vidioc_reqbufs
= cafe_vidioc_reqbufs
,
1784 .vidioc_querybuf
= cafe_vidioc_querybuf
,
1785 .vidioc_qbuf
= cafe_vidioc_qbuf
,
1786 .vidioc_dqbuf
= cafe_vidioc_dqbuf
,
1787 .vidioc_streamon
= cafe_vidioc_streamon
,
1788 .vidioc_streamoff
= cafe_vidioc_streamoff
,
1789 .vidioc_queryctrl
= cafe_vidioc_queryctrl
,
1790 .vidioc_g_ctrl
= cafe_vidioc_g_ctrl
,
1791 .vidioc_s_ctrl
= cafe_vidioc_s_ctrl
,
1792 .vidioc_g_parm
= cafe_vidioc_g_parm
,
1793 .vidioc_s_parm
= cafe_vidioc_s_parm
,
1796 static struct video_device cafe_v4l_template
= {
1798 .minor
= -1, /* Get one dynamically */
1799 .tvnorms
= V4L2_STD_NTSC_M
,
1800 .current_norm
= V4L2_STD_NTSC_M
, /* make mplayer happy */
1802 .fops
= &cafe_v4l_fops
,
1803 .ioctl_ops
= &cafe_v4l_ioctl_ops
,
1804 .release
= cafe_v4l_dev_release
,
1813 /* ---------------------------------------------------------------------- */
1815 * Interrupt handler stuff
1820 static void cafe_frame_tasklet(unsigned long data
)
1822 struct cafe_camera
*cam
= (struct cafe_camera
*) data
;
1824 unsigned long flags
;
1825 struct cafe_sio_buffer
*sbuf
;
1827 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1828 for (i
= 0; i
< cam
->nbufs
; i
++) {
1829 int bufno
= cam
->next_buf
;
1830 if (bufno
< 0) { /* "will never happen" */
1831 cam_err(cam
, "No valid bufs in tasklet!\n");
1834 if (++(cam
->next_buf
) >= cam
->nbufs
)
1836 if (! test_bit(bufno
, &cam
->flags
))
1838 if (list_empty(&cam
->sb_avail
))
1839 break; /* Leave it valid, hope for better later */
1840 clear_bit(bufno
, &cam
->flags
);
1841 sbuf
= list_entry(cam
->sb_avail
.next
,
1842 struct cafe_sio_buffer
, list
);
1844 * Drop the lock during the big copy. This *should* be safe...
1846 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1847 memcpy(sbuf
->buffer
, cam
->dma_bufs
[bufno
],
1848 cam
->pix_format
.sizeimage
);
1849 sbuf
->v4lbuf
.bytesused
= cam
->pix_format
.sizeimage
;
1850 sbuf
->v4lbuf
.sequence
= cam
->buf_seq
[bufno
];
1851 sbuf
->v4lbuf
.flags
&= ~V4L2_BUF_FLAG_QUEUED
;
1852 sbuf
->v4lbuf
.flags
|= V4L2_BUF_FLAG_DONE
;
1853 spin_lock_irqsave(&cam
->dev_lock
, flags
);
1854 list_move_tail(&sbuf
->list
, &cam
->sb_full
);
1856 if (! list_empty(&cam
->sb_full
))
1857 wake_up(&cam
->iowait
);
1858 spin_unlock_irqrestore(&cam
->dev_lock
, flags
);
1863 static void cafe_frame_complete(struct cafe_camera
*cam
, int frame
)
1866 * Basic frame housekeeping.
1868 if (test_bit(frame
, &cam
->flags
) && printk_ratelimit())
1869 cam_err(cam
, "Frame overrun on %d, frames lost\n", frame
);
1870 set_bit(frame
, &cam
->flags
);
1871 clear_bit(CF_DMA_ACTIVE
, &cam
->flags
);
1872 if (cam
->next_buf
< 0)
1873 cam
->next_buf
= frame
;
1874 cam
->buf_seq
[frame
] = ++(cam
->sequence
);
1876 switch (cam
->state
) {
1878 * If in single read mode, try going speculative.
1881 cam
->state
= S_SPECREAD
;
1882 cam
->specframes
= 0;
1883 wake_up(&cam
->iowait
);
1887 * If we are already doing speculative reads, and nobody is
1888 * reading them, just stop.
1891 if (++(cam
->specframes
) >= cam
->nbufs
) {
1892 cafe_ctlr_stop(cam
);
1893 cafe_ctlr_irq_disable(cam
);
1894 cam
->state
= S_IDLE
;
1896 wake_up(&cam
->iowait
);
1899 * For the streaming case, we defer the real work to the
1902 * FIXME: if the application is not consuming the buffers,
1903 * we should eventually put things on hold and restart in
1907 tasklet_schedule(&cam
->s_tasklet
);
1911 cam_err(cam
, "Frame interrupt in non-operational state\n");
1919 static void cafe_frame_irq(struct cafe_camera
*cam
, unsigned int irqs
)
1923 cafe_reg_write(cam
, REG_IRQSTAT
, FRAMEIRQS
); /* Clear'em all */
1925 * Handle any frame completions. There really should
1926 * not be more than one of these, or we have fallen
1929 for (frame
= 0; frame
< cam
->nbufs
; frame
++)
1930 if (irqs
& (IRQ_EOF0
<< frame
))
1931 cafe_frame_complete(cam
, frame
);
1933 * If a frame starts, note that we have DMA active. This
1934 * code assumes that we won't get multiple frame interrupts
1935 * at once; may want to rethink that.
1937 if (irqs
& (IRQ_SOF0
| IRQ_SOF1
| IRQ_SOF2
))
1938 set_bit(CF_DMA_ACTIVE
, &cam
->flags
);
1943 static irqreturn_t
cafe_irq(int irq
, void *data
)
1945 struct cafe_camera
*cam
= data
;
1948 spin_lock(&cam
->dev_lock
);
1949 irqs
= cafe_reg_read(cam
, REG_IRQSTAT
);
1950 if ((irqs
& ALLIRQS
) == 0) {
1951 spin_unlock(&cam
->dev_lock
);
1954 if (irqs
& FRAMEIRQS
)
1955 cafe_frame_irq(cam
, irqs
);
1956 if (irqs
& TWSIIRQS
) {
1957 cafe_reg_write(cam
, REG_IRQSTAT
, TWSIIRQS
);
1958 wake_up(&cam
->smbus_wait
);
1960 spin_unlock(&cam
->dev_lock
);
1965 /* -------------------------------------------------------------------------- */
1966 #ifdef CONFIG_VIDEO_ADV_DEBUG
1971 static char cafe_debug_buf
[1024];
1972 static struct dentry
*cafe_dfs_root
;
1974 static void cafe_dfs_setup(void)
1976 cafe_dfs_root
= debugfs_create_dir("cafe_ccic", NULL
);
1977 if (IS_ERR(cafe_dfs_root
)) {
1978 cafe_dfs_root
= NULL
; /* Never mind */
1979 printk(KERN_NOTICE
"cafe_ccic unable to set up debugfs\n");
1983 static void cafe_dfs_shutdown(void)
1986 debugfs_remove(cafe_dfs_root
);
1989 static int cafe_dfs_open(struct inode
*inode
, struct file
*file
)
1991 file
->private_data
= inode
->i_private
;
1995 static ssize_t
cafe_dfs_read_regs(struct file
*file
,
1996 char __user
*buf
, size_t count
, loff_t
*ppos
)
1998 struct cafe_camera
*cam
= file
->private_data
;
1999 char *s
= cafe_debug_buf
;
2002 for (offset
= 0; offset
< 0x44; offset
+= 4)
2003 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2004 cafe_reg_read(cam
, offset
));
2005 for (offset
= 0x88; offset
<= 0x90; offset
+= 4)
2006 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2007 cafe_reg_read(cam
, offset
));
2008 for (offset
= 0xb4; offset
<= 0xbc; offset
+= 4)
2009 s
+= sprintf(s
, "%02x: %08x\n", offset
,
2010 cafe_reg_read(cam
, offset
));
2011 for (offset
= 0x3000; offset
<= 0x300c; offset
+= 4)
2012 s
+= sprintf(s
, "%04x: %08x\n", offset
,
2013 cafe_reg_read(cam
, offset
));
2014 return simple_read_from_buffer(buf
, count
, ppos
, cafe_debug_buf
,
2015 s
- cafe_debug_buf
);
2018 static const struct file_operations cafe_dfs_reg_ops
= {
2019 .owner
= THIS_MODULE
,
2020 .read
= cafe_dfs_read_regs
,
2021 .open
= cafe_dfs_open
2024 static ssize_t
cafe_dfs_read_cam(struct file
*file
,
2025 char __user
*buf
, size_t count
, loff_t
*ppos
)
2027 struct cafe_camera
*cam
= file
->private_data
;
2028 char *s
= cafe_debug_buf
;
2033 for (offset
= 0x0; offset
< 0x8a; offset
++)
2037 cafe_smbus_read_data(cam
, cam
->sensor
->addr
, offset
, &v
);
2038 s
+= sprintf(s
, "%02x: %02x\n", offset
, v
);
2040 return simple_read_from_buffer(buf
, count
, ppos
, cafe_debug_buf
,
2041 s
- cafe_debug_buf
);
2044 static const struct file_operations cafe_dfs_cam_ops
= {
2045 .owner
= THIS_MODULE
,
2046 .read
= cafe_dfs_read_cam
,
2047 .open
= cafe_dfs_open
2052 static void cafe_dfs_cam_setup(struct cafe_camera
*cam
)
2058 sprintf(fname
, "regs-%d", cam
->v4ldev
.num
);
2059 cam
->dfs_regs
= debugfs_create_file(fname
, 0444, cafe_dfs_root
,
2060 cam
, &cafe_dfs_reg_ops
);
2061 sprintf(fname
, "cam-%d", cam
->v4ldev
.num
);
2062 cam
->dfs_cam_regs
= debugfs_create_file(fname
, 0444, cafe_dfs_root
,
2063 cam
, &cafe_dfs_cam_ops
);
2067 static void cafe_dfs_cam_shutdown(struct cafe_camera
*cam
)
2069 if (! IS_ERR(cam
->dfs_regs
))
2070 debugfs_remove(cam
->dfs_regs
);
2071 if (! IS_ERR(cam
->dfs_cam_regs
))
2072 debugfs_remove(cam
->dfs_cam_regs
);
2077 #define cafe_dfs_setup()
2078 #define cafe_dfs_shutdown()
2079 #define cafe_dfs_cam_setup(cam)
2080 #define cafe_dfs_cam_shutdown(cam)
2081 #endif /* CONFIG_VIDEO_ADV_DEBUG */
2086 /* ------------------------------------------------------------------------*/
2088 * PCI interface stuff.
2091 static int cafe_pci_probe(struct pci_dev
*pdev
,
2092 const struct pci_device_id
*id
)
2095 struct cafe_camera
*cam
;
2098 * Start putting together one of our big camera structures.
2101 cam
= kzalloc(sizeof(struct cafe_camera
), GFP_KERNEL
);
2104 mutex_init(&cam
->s_mutex
);
2105 mutex_lock(&cam
->s_mutex
);
2106 spin_lock_init(&cam
->dev_lock
);
2107 cam
->state
= S_NOTREADY
;
2108 cafe_set_config_needed(cam
, 1);
2109 init_waitqueue_head(&cam
->smbus_wait
);
2110 init_waitqueue_head(&cam
->iowait
);
2112 cam
->pix_format
= cafe_def_pix_format
;
2113 INIT_LIST_HEAD(&cam
->dev_list
);
2114 INIT_LIST_HEAD(&cam
->sb_avail
);
2115 INIT_LIST_HEAD(&cam
->sb_full
);
2116 tasklet_init(&cam
->s_tasklet
, cafe_frame_tasklet
, (unsigned long) cam
);
2118 * Get set up on the PCI bus.
2120 ret
= pci_enable_device(pdev
);
2123 pci_set_master(pdev
);
2126 cam
->regs
= pci_iomap(pdev
, 0, 0);
2128 printk(KERN_ERR
"Unable to ioremap cafe-ccic regs\n");
2131 ret
= request_irq(pdev
->irq
, cafe_irq
, IRQF_SHARED
, "cafe-ccic", cam
);
2135 * Initialize the controller and leave it powered up. It will
2136 * stay that way until the sensor driver shows up.
2138 cafe_ctlr_init(cam
);
2139 cafe_ctlr_power_up(cam
);
2141 * Set up I2C/SMBUS communications. We have to drop the mutex here
2142 * because the sensor could attach in this call chain, leading to
2143 * unsightly deadlocks.
2145 mutex_unlock(&cam
->s_mutex
); /* attach can deadlock */
2146 ret
= cafe_smbus_setup(cam
);
2150 * Get the v4l2 setup done.
2152 mutex_lock(&cam
->s_mutex
);
2153 cam
->v4ldev
= cafe_v4l_template
;
2154 cam
->v4ldev
.debug
= 0;
2155 // cam->v4ldev.debug = V4L2_DEBUG_IOCTL_ARG;
2156 cam
->v4ldev
.parent
= &pdev
->dev
;
2157 ret
= video_register_device(&cam
->v4ldev
, VFL_TYPE_GRABBER
, -1);
2161 * If so requested, try to get our DMA buffers now.
2163 if (!alloc_bufs_at_read
) {
2164 if (cafe_alloc_dma_bufs(cam
, 1))
2165 cam_warn(cam
, "Unable to alloc DMA buffers at load"
2166 " will try again later.");
2169 cafe_dfs_cam_setup(cam
);
2170 mutex_unlock(&cam
->s_mutex
);
2175 cafe_smbus_shutdown(cam
);
2177 cafe_ctlr_power_down(cam
);
2178 free_irq(pdev
->irq
, cam
);
2180 pci_iounmap(pdev
, cam
->regs
);
2189 * Shut down an initialized device
2191 static void cafe_shutdown(struct cafe_camera
*cam
)
2193 /* FIXME: Make sure we take care of everything here */
2194 cafe_dfs_cam_shutdown(cam
);
2195 if (cam
->n_sbufs
> 0)
2196 /* What if they are still mapped? Shouldn't be, but... */
2197 cafe_free_sio_buffers(cam
);
2198 cafe_remove_dev(cam
);
2199 cafe_ctlr_stop_dma(cam
);
2200 cafe_ctlr_power_down(cam
);
2201 cafe_smbus_shutdown(cam
);
2202 cafe_free_dma_bufs(cam
);
2203 free_irq(cam
->pdev
->irq
, cam
);
2204 pci_iounmap(cam
->pdev
, cam
->regs
);
2205 video_unregister_device(&cam
->v4ldev
);
2206 /* kfree(cam); done in v4l_release () */
2210 static void cafe_pci_remove(struct pci_dev
*pdev
)
2212 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2215 printk(KERN_WARNING
"pci_remove on unknown pdev %p\n", pdev
);
2218 mutex_lock(&cam
->s_mutex
);
2220 cam_warn(cam
, "Removing a device with users!\n");
2222 /* No unlock - it no longer exists */
2228 * Basic power management.
2230 static int cafe_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2232 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2234 enum cafe_state cstate
;
2236 ret
= pci_save_state(pdev
);
2239 cstate
= cam
->state
; /* HACK - stop_dma sets to idle */
2240 cafe_ctlr_stop_dma(cam
);
2241 cafe_ctlr_power_down(cam
);
2242 pci_disable_device(pdev
);
2243 cam
->state
= cstate
;
2248 static int cafe_pci_resume(struct pci_dev
*pdev
)
2250 struct cafe_camera
*cam
= cafe_find_by_pdev(pdev
);
2253 ret
= pci_restore_state(pdev
);
2256 ret
= pci_enable_device(pdev
);
2259 cam_warn(cam
, "Unable to re-enable device on resume!\n");
2262 cafe_ctlr_init(cam
);
2263 cafe_ctlr_power_down(cam
);
2265 mutex_lock(&cam
->s_mutex
);
2266 if (cam
->users
> 0) {
2267 cafe_ctlr_power_up(cam
);
2268 __cafe_cam_reset(cam
);
2270 mutex_unlock(&cam
->s_mutex
);
2272 set_bit(CF_CONFIG_NEEDED
, &cam
->flags
);
2273 if (cam
->state
== S_SPECREAD
)
2274 cam
->state
= S_IDLE
; /* Don't bother restarting */
2275 else if (cam
->state
== S_SINGLEREAD
|| cam
->state
== S_STREAMING
)
2276 ret
= cafe_read_setup(cam
, cam
->state
);
2280 #endif /* CONFIG_PM */
2283 static struct pci_device_id cafe_ids
[] = {
2284 { PCI_DEVICE(PCI_VENDOR_ID_MARVELL
,
2285 PCI_DEVICE_ID_MARVELL_88ALP01_CCIC
) },
2289 MODULE_DEVICE_TABLE(pci
, cafe_ids
);
2291 static struct pci_driver cafe_pci_driver
= {
2292 .name
= "cafe1000-ccic",
2293 .id_table
= cafe_ids
,
2294 .probe
= cafe_pci_probe
,
2295 .remove
= cafe_pci_remove
,
2297 .suspend
= cafe_pci_suspend
,
2298 .resume
= cafe_pci_resume
,
2305 static int __init
cafe_init(void)
2309 printk(KERN_NOTICE
"Marvell M88ALP01 'CAFE' Camera Controller version %d\n",
2312 ret
= pci_register_driver(&cafe_pci_driver
);
2314 printk(KERN_ERR
"Unable to register cafe_ccic driver\n");
2317 request_module("ov7670"); /* FIXME want something more general */
2325 static void __exit
cafe_exit(void)
2327 pci_unregister_driver(&cafe_pci_driver
);
2328 cafe_dfs_shutdown();
2331 module_init(cafe_init
);
2332 module_exit(cafe_exit
);