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d905b382 JC |
1 | /* |
2 | * A driver for the CMOS camera controller in the Marvell 88ALP01 "cafe" | |
3 | * multifunction chip. Currently works with the Omnivision OV7670 | |
4 | * sensor. | |
5 | * | |
bb8d56a4 JC |
6 | * The data sheet for this device can be found at: |
7 | * http://www.marvell.com/products/pcconn/88ALP01.jsp | |
8 | * | |
d905b382 | 9 | * Copyright 2006 One Laptop Per Child Association, Inc. |
77d5140f | 10 | * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net> |
d905b382 JC |
11 | * |
12 | * Written by Jonathan Corbet, corbet@lwn.net. | |
13 | * | |
14 | * This file may be distributed under the terms of the GNU General | |
15 | * Public License, version 2. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
d905b382 JC |
20 | #include <linux/init.h> |
21 | #include <linux/fs.h> | |
22 | #include <linux/pci.h> | |
23 | #include <linux/i2c.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/videodev2.h> | |
27 | #include <media/v4l2-common.h> | |
3434eb7e | 28 | #include <media/v4l2-chip-ident.h> |
d905b382 JC |
29 | #include <linux/device.h> |
30 | #include <linux/wait.h> | |
31 | #include <linux/list.h> | |
32 | #include <linux/dma-mapping.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/debugfs.h> | |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/vmalloc.h> | |
37 | ||
38 | #include <asm/uaccess.h> | |
39 | #include <asm/io.h> | |
40 | ||
41 | #include "cafe_ccic-regs.h" | |
42 | ||
ff68defa | 43 | #define CAFE_VERSION 0x000002 |
d905b382 JC |
44 | |
45 | ||
46 | /* | |
47 | * Parameters. | |
48 | */ | |
49 | MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>"); | |
50 | MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | MODULE_SUPPORTED_DEVICE("Video"); | |
53 | ||
54 | /* | |
55 | * Internal DMA buffer management. Since the controller cannot do S/G I/O, | |
56 | * we must have physically contiguous buffers to bring frames into. | |
57 | * These parameters control how many buffers we use, whether we | |
58 | * allocate them at load time (better chance of success, but nails down | |
59 | * memory) or when somebody tries to use the camera (riskier), and, | |
60 | * for load-time allocation, how big they should be. | |
61 | * | |
62 | * The controller can cycle through three buffers. We could use | |
63 | * more by flipping pointers around, but it probably makes little | |
64 | * sense. | |
65 | */ | |
66 | ||
67 | #define MAX_DMA_BUFS 3 | |
23869e23 AS |
68 | static int alloc_bufs_at_read = 0; |
69 | module_param(alloc_bufs_at_read, bool, 0444); | |
70 | MODULE_PARM_DESC(alloc_bufs_at_read, | |
71 | "Non-zero value causes DMA buffers to be allocated when the " | |
72 | "video capture device is read, rather than at module load " | |
73 | "time. This saves memory, but decreases the chances of " | |
74 | "successfully getting those buffers."); | |
d905b382 JC |
75 | |
76 | static int n_dma_bufs = 3; | |
77 | module_param(n_dma_bufs, uint, 0644); | |
78 | MODULE_PARM_DESC(n_dma_bufs, | |
79 | "The number of DMA buffers to allocate. Can be either two " | |
80 | "(saves memory, makes timing tighter) or three."); | |
81 | ||
82 | static int dma_buf_size = VGA_WIDTH * VGA_HEIGHT * 2; /* Worst case */ | |
83 | module_param(dma_buf_size, uint, 0444); | |
84 | MODULE_PARM_DESC(dma_buf_size, | |
85 | "The size of the allocated DMA buffers. If actual operating " | |
86 | "parameters require larger buffers, an attempt to reallocate " | |
87 | "will be made."); | |
88 | ||
89 | static int min_buffers = 1; | |
90 | module_param(min_buffers, uint, 0644); | |
91 | MODULE_PARM_DESC(min_buffers, | |
92 | "The minimum number of streaming I/O buffers we are willing " | |
93 | "to work with."); | |
94 | ||
95 | static int max_buffers = 10; | |
96 | module_param(max_buffers, uint, 0644); | |
97 | MODULE_PARM_DESC(max_buffers, | |
98 | "The maximum number of streaming I/O buffers an application " | |
99 | "will be allowed to allocate. These buffers are big and live " | |
100 | "in vmalloc space."); | |
101 | ||
102 | static int flip = 0; | |
103 | module_param(flip, bool, 0444); | |
104 | MODULE_PARM_DESC(flip, | |
105 | "If set, the sensor will be instructed to flip the image " | |
106 | "vertically."); | |
107 | ||
108 | ||
109 | enum cafe_state { | |
110 | S_NOTREADY, /* Not yet initialized */ | |
111 | S_IDLE, /* Just hanging around */ | |
112 | S_FLAKED, /* Some sort of problem */ | |
113 | S_SINGLEREAD, /* In read() */ | |
114 | S_SPECREAD, /* Speculative read (for future read()) */ | |
115 | S_STREAMING /* Streaming data */ | |
116 | }; | |
117 | ||
118 | /* | |
119 | * Tracking of streaming I/O buffers. | |
120 | */ | |
121 | struct cafe_sio_buffer { | |
122 | struct list_head list; | |
123 | struct v4l2_buffer v4lbuf; | |
124 | char *buffer; /* Where it lives in kernel space */ | |
125 | int mapcount; | |
126 | struct cafe_camera *cam; | |
127 | }; | |
128 | ||
129 | /* | |
130 | * A description of one of our devices. | |
131 | * Locking: controlled by s_mutex. Certain fields, however, require | |
132 | * the dev_lock spinlock; they are marked as such by comments. | |
133 | * dev_lock is also required for access to device registers. | |
134 | */ | |
135 | struct cafe_camera | |
136 | { | |
137 | enum cafe_state state; | |
138 | unsigned long flags; /* Buffer status, mainly (dev_lock) */ | |
139 | int users; /* How many open FDs */ | |
140 | struct file *owner; /* Who has data access (v4l2) */ | |
141 | ||
142 | /* | |
143 | * Subsystem structures. | |
144 | */ | |
145 | struct pci_dev *pdev; | |
146 | struct video_device v4ldev; | |
147 | struct i2c_adapter i2c_adapter; | |
148 | struct i2c_client *sensor; | |
149 | ||
150 | unsigned char __iomem *regs; | |
151 | struct list_head dev_list; /* link to other devices */ | |
152 | ||
153 | /* DMA buffers */ | |
154 | unsigned int nbufs; /* How many are alloc'd */ | |
155 | int next_buf; /* Next to consume (dev_lock) */ | |
156 | unsigned int dma_buf_size; /* allocated size */ | |
157 | void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */ | |
158 | dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */ | |
159 | unsigned int specframes; /* Unconsumed spec frames (dev_lock) */ | |
160 | unsigned int sequence; /* Frame sequence number */ | |
161 | unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual buffers */ | |
162 | ||
163 | /* Streaming buffers */ | |
164 | unsigned int n_sbufs; /* How many we have */ | |
165 | struct cafe_sio_buffer *sb_bufs; /* The array of housekeeping structs */ | |
166 | struct list_head sb_avail; /* Available for data (we own) (dev_lock) */ | |
167 | struct list_head sb_full; /* With data (user space owns) (dev_lock) */ | |
168 | struct tasklet_struct s_tasklet; | |
169 | ||
170 | /* Current operating parameters */ | |
3434eb7e | 171 | u32 sensor_type; /* Currently ov7670 only */ |
d905b382 JC |
172 | struct v4l2_pix_format pix_format; |
173 | ||
174 | /* Locks */ | |
175 | struct mutex s_mutex; /* Access to this structure */ | |
176 | spinlock_t dev_lock; /* Access to device */ | |
177 | ||
178 | /* Misc */ | |
179 | wait_queue_head_t smbus_wait; /* Waiting on i2c events */ | |
180 | wait_queue_head_t iowait; /* Waiting on frame data */ | |
181 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
182 | struct dentry *dfs_regs; | |
183 | struct dentry *dfs_cam_regs; | |
184 | #endif | |
185 | }; | |
186 | ||
187 | /* | |
188 | * Status flags. Always manipulated with bit operations. | |
189 | */ | |
190 | #define CF_BUF0_VALID 0 /* Buffers valid - first three */ | |
191 | #define CF_BUF1_VALID 1 | |
192 | #define CF_BUF2_VALID 2 | |
193 | #define CF_DMA_ACTIVE 3 /* A frame is incoming */ | |
194 | #define CF_CONFIG_NEEDED 4 /* Must configure hardware */ | |
195 | ||
196 | ||
197 | ||
198 | /* | |
199 | * Start over with DMA buffers - dev_lock needed. | |
200 | */ | |
201 | static void cafe_reset_buffers(struct cafe_camera *cam) | |
202 | { | |
203 | int i; | |
204 | ||
205 | cam->next_buf = -1; | |
206 | for (i = 0; i < cam->nbufs; i++) | |
207 | clear_bit(i, &cam->flags); | |
208 | cam->specframes = 0; | |
209 | } | |
210 | ||
211 | static inline int cafe_needs_config(struct cafe_camera *cam) | |
212 | { | |
213 | return test_bit(CF_CONFIG_NEEDED, &cam->flags); | |
214 | } | |
215 | ||
216 | static void cafe_set_config_needed(struct cafe_camera *cam, int needed) | |
217 | { | |
218 | if (needed) | |
219 | set_bit(CF_CONFIG_NEEDED, &cam->flags); | |
220 | else | |
221 | clear_bit(CF_CONFIG_NEEDED, &cam->flags); | |
222 | } | |
223 | ||
224 | ||
225 | ||
226 | ||
227 | /* | |
228 | * Debugging and related. | |
229 | */ | |
230 | #define cam_err(cam, fmt, arg...) \ | |
231 | dev_err(&(cam)->pdev->dev, fmt, ##arg); | |
232 | #define cam_warn(cam, fmt, arg...) \ | |
233 | dev_warn(&(cam)->pdev->dev, fmt, ##arg); | |
234 | #define cam_dbg(cam, fmt, arg...) \ | |
235 | dev_dbg(&(cam)->pdev->dev, fmt, ##arg); | |
236 | ||
237 | ||
238 | /* ---------------------------------------------------------------------*/ | |
239 | /* | |
240 | * We keep a simple list of known devices to search at open time. | |
241 | */ | |
242 | static LIST_HEAD(cafe_dev_list); | |
243 | static DEFINE_MUTEX(cafe_dev_list_lock); | |
244 | ||
245 | static void cafe_add_dev(struct cafe_camera *cam) | |
246 | { | |
247 | mutex_lock(&cafe_dev_list_lock); | |
248 | list_add_tail(&cam->dev_list, &cafe_dev_list); | |
249 | mutex_unlock(&cafe_dev_list_lock); | |
250 | } | |
251 | ||
252 | static void cafe_remove_dev(struct cafe_camera *cam) | |
253 | { | |
254 | mutex_lock(&cafe_dev_list_lock); | |
255 | list_del(&cam->dev_list); | |
256 | mutex_unlock(&cafe_dev_list_lock); | |
257 | } | |
258 | ||
259 | static struct cafe_camera *cafe_find_dev(int minor) | |
260 | { | |
261 | struct cafe_camera *cam; | |
262 | ||
263 | mutex_lock(&cafe_dev_list_lock); | |
264 | list_for_each_entry(cam, &cafe_dev_list, dev_list) { | |
265 | if (cam->v4ldev.minor == minor) | |
266 | goto done; | |
267 | } | |
268 | cam = NULL; | |
269 | done: | |
270 | mutex_unlock(&cafe_dev_list_lock); | |
271 | return cam; | |
272 | } | |
273 | ||
274 | ||
275 | static struct cafe_camera *cafe_find_by_pdev(struct pci_dev *pdev) | |
276 | { | |
277 | struct cafe_camera *cam; | |
278 | ||
279 | mutex_lock(&cafe_dev_list_lock); | |
280 | list_for_each_entry(cam, &cafe_dev_list, dev_list) { | |
281 | if (cam->pdev == pdev) | |
282 | goto done; | |
283 | } | |
284 | cam = NULL; | |
285 | done: | |
286 | mutex_unlock(&cafe_dev_list_lock); | |
287 | return cam; | |
288 | } | |
289 | ||
290 | ||
291 | /* ------------------------------------------------------------------------ */ | |
292 | /* | |
293 | * Device register I/O | |
294 | */ | |
295 | static inline void cafe_reg_write(struct cafe_camera *cam, unsigned int reg, | |
296 | unsigned int val) | |
297 | { | |
298 | iowrite32(val, cam->regs + reg); | |
299 | } | |
300 | ||
301 | static inline unsigned int cafe_reg_read(struct cafe_camera *cam, | |
302 | unsigned int reg) | |
303 | { | |
304 | return ioread32(cam->regs + reg); | |
305 | } | |
306 | ||
307 | ||
308 | static inline void cafe_reg_write_mask(struct cafe_camera *cam, unsigned int reg, | |
309 | unsigned int val, unsigned int mask) | |
310 | { | |
311 | unsigned int v = cafe_reg_read(cam, reg); | |
312 | ||
313 | v = (v & ~mask) | (val & mask); | |
314 | cafe_reg_write(cam, reg, v); | |
315 | } | |
316 | ||
317 | static inline void cafe_reg_clear_bit(struct cafe_camera *cam, | |
318 | unsigned int reg, unsigned int val) | |
319 | { | |
320 | cafe_reg_write_mask(cam, reg, 0, val); | |
321 | } | |
322 | ||
323 | static inline void cafe_reg_set_bit(struct cafe_camera *cam, | |
324 | unsigned int reg, unsigned int val) | |
325 | { | |
326 | cafe_reg_write_mask(cam, reg, val, val); | |
327 | } | |
328 | ||
329 | ||
330 | ||
331 | /* -------------------------------------------------------------------- */ | |
332 | /* | |
333 | * The I2C/SMBUS interface to the camera itself starts here. The | |
334 | * controller handles SMBUS itself, presenting a relatively simple register | |
335 | * interface; all we have to do is to tell it where to route the data. | |
336 | */ | |
337 | #define CAFE_SMBUS_TIMEOUT (HZ) /* generous */ | |
338 | ||
339 | static int cafe_smbus_write_done(struct cafe_camera *cam) | |
340 | { | |
341 | unsigned long flags; | |
342 | int c1; | |
343 | ||
344 | /* | |
345 | * We must delay after the interrupt, or the controller gets confused | |
346 | * and never does give us good status. Fortunately, we don't do this | |
347 | * often. | |
348 | */ | |
349 | udelay(20); | |
350 | spin_lock_irqsave(&cam->dev_lock, flags); | |
351 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
352 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
353 | return (c1 & (TWSIC1_WSTAT|TWSIC1_ERROR)) != TWSIC1_WSTAT; | |
354 | } | |
355 | ||
356 | static int cafe_smbus_write_data(struct cafe_camera *cam, | |
357 | u16 addr, u8 command, u8 value) | |
358 | { | |
359 | unsigned int rval; | |
360 | unsigned long flags; | |
6d77444a | 361 | DEFINE_WAIT(the_wait); |
d905b382 JC |
362 | |
363 | spin_lock_irqsave(&cam->dev_lock, flags); | |
364 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
365 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
366 | /* | |
367 | * Marvell sez set clkdiv to all 1's for now. | |
368 | */ | |
369 | rval |= TWSIC0_CLKDIV; | |
370 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
371 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
372 | rval = value | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
373 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
374 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
d905b382 | 375 | |
6d77444a JC |
376 | /* |
377 | * Time to wait for the write to complete. THIS IS A RACY | |
378 | * WAY TO DO IT, but the sad fact is that reading the TWSIC1 | |
379 | * register too quickly after starting the operation sends | |
380 | * the device into a place that may be kinder and better, but | |
381 | * which is absolutely useless for controlling the sensor. In | |
382 | * practice we have plenty of time to get into our sleep state | |
383 | * before the interrupt hits, and the worst case is that we | |
384 | * time out and then see that things completed, so this seems | |
385 | * the best way for now. | |
386 | */ | |
387 | do { | |
388 | prepare_to_wait(&cam->smbus_wait, &the_wait, | |
389 | TASK_UNINTERRUPTIBLE); | |
390 | schedule_timeout(1); /* even 1 jiffy is too long */ | |
391 | finish_wait(&cam->smbus_wait, &the_wait); | |
392 | } while (!cafe_smbus_write_done(cam)); | |
393 | ||
394 | #ifdef IF_THE_CAFE_HARDWARE_WORKED_RIGHT | |
d905b382 JC |
395 | wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(cam), |
396 | CAFE_SMBUS_TIMEOUT); | |
6d77444a | 397 | #endif |
d905b382 JC |
398 | spin_lock_irqsave(&cam->dev_lock, flags); |
399 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
400 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
401 | ||
402 | if (rval & TWSIC1_WSTAT) { | |
403 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) timed out\n", addr, | |
404 | command, value); | |
405 | return -EIO; | |
406 | } | |
407 | if (rval & TWSIC1_ERROR) { | |
408 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) error\n", addr, | |
409 | command, value); | |
410 | return -EIO; | |
411 | } | |
412 | return 0; | |
413 | } | |
414 | ||
415 | ||
416 | ||
417 | static int cafe_smbus_read_done(struct cafe_camera *cam) | |
418 | { | |
419 | unsigned long flags; | |
420 | int c1; | |
421 | ||
422 | /* | |
423 | * We must delay after the interrupt, or the controller gets confused | |
424 | * and never does give us good status. Fortunately, we don't do this | |
425 | * often. | |
426 | */ | |
427 | udelay(20); | |
428 | spin_lock_irqsave(&cam->dev_lock, flags); | |
429 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
430 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
431 | return c1 & (TWSIC1_RVALID|TWSIC1_ERROR); | |
432 | } | |
433 | ||
434 | ||
435 | ||
436 | static int cafe_smbus_read_data(struct cafe_camera *cam, | |
437 | u16 addr, u8 command, u8 *value) | |
438 | { | |
439 | unsigned int rval; | |
440 | unsigned long flags; | |
441 | ||
442 | spin_lock_irqsave(&cam->dev_lock, flags); | |
443 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
444 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
445 | /* | |
446 | * Marvel sez set clkdiv to all 1's for now. | |
447 | */ | |
448 | rval |= TWSIC0_CLKDIV; | |
449 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
450 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
451 | rval = TWSIC1_READ | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
452 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
453 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
454 | ||
455 | wait_event_timeout(cam->smbus_wait, | |
456 | cafe_smbus_read_done(cam), CAFE_SMBUS_TIMEOUT); | |
457 | spin_lock_irqsave(&cam->dev_lock, flags); | |
458 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
459 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
460 | ||
461 | if (rval & TWSIC1_ERROR) { | |
462 | cam_err(cam, "SMBUS read (%02x/%02x) error\n", addr, command); | |
463 | return -EIO; | |
464 | } | |
465 | if (! (rval & TWSIC1_RVALID)) { | |
466 | cam_err(cam, "SMBUS read (%02x/%02x) timed out\n", addr, | |
467 | command); | |
468 | return -EIO; | |
469 | } | |
470 | *value = rval & 0xff; | |
471 | return 0; | |
472 | } | |
473 | ||
474 | /* | |
475 | * Perform a transfer over SMBUS. This thing is called under | |
476 | * the i2c bus lock, so we shouldn't race with ourselves... | |
477 | */ | |
478 | static int cafe_smbus_xfer(struct i2c_adapter *adapter, u16 addr, | |
479 | unsigned short flags, char rw, u8 command, | |
480 | int size, union i2c_smbus_data *data) | |
481 | { | |
482 | struct cafe_camera *cam = i2c_get_adapdata(adapter); | |
483 | int ret = -EINVAL; | |
484 | ||
485 | /* | |
486 | * Refuse to talk to anything but OV cam chips. We should | |
487 | * never even see an attempt to do so, but one never knows. | |
488 | */ | |
489 | if (cam->sensor && addr != cam->sensor->addr) { | |
490 | cam_err(cam, "funky smbus addr %d\n", addr); | |
491 | return -EINVAL; | |
492 | } | |
493 | /* | |
494 | * This interface would appear to only do byte data ops. OK | |
495 | * it can do word too, but the cam chip has no use for that. | |
496 | */ | |
497 | if (size != I2C_SMBUS_BYTE_DATA) { | |
498 | cam_err(cam, "funky xfer size %d\n", size); | |
499 | return -EINVAL; | |
500 | } | |
501 | ||
502 | if (rw == I2C_SMBUS_WRITE) | |
503 | ret = cafe_smbus_write_data(cam, addr, command, data->byte); | |
504 | else if (rw == I2C_SMBUS_READ) | |
505 | ret = cafe_smbus_read_data(cam, addr, command, &data->byte); | |
506 | return ret; | |
507 | } | |
508 | ||
509 | ||
510 | static void cafe_smbus_enable_irq(struct cafe_camera *cam) | |
511 | { | |
512 | unsigned long flags; | |
513 | ||
514 | spin_lock_irqsave(&cam->dev_lock, flags); | |
515 | cafe_reg_set_bit(cam, REG_IRQMASK, TWSIIRQS); | |
516 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
517 | } | |
518 | ||
519 | static u32 cafe_smbus_func(struct i2c_adapter *adapter) | |
520 | { | |
521 | return I2C_FUNC_SMBUS_READ_BYTE_DATA | | |
522 | I2C_FUNC_SMBUS_WRITE_BYTE_DATA; | |
523 | } | |
524 | ||
525 | static struct i2c_algorithm cafe_smbus_algo = { | |
526 | .smbus_xfer = cafe_smbus_xfer, | |
527 | .functionality = cafe_smbus_func | |
528 | }; | |
529 | ||
530 | /* Somebody is on the bus */ | |
531 | static int cafe_cam_init(struct cafe_camera *cam); | |
f9a76156 JC |
532 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam); |
533 | static void cafe_ctlr_power_down(struct cafe_camera *cam); | |
d905b382 JC |
534 | |
535 | static int cafe_smbus_attach(struct i2c_client *client) | |
536 | { | |
537 | struct cafe_camera *cam = i2c_get_adapdata(client->adapter); | |
538 | ||
539 | /* | |
540 | * Don't talk to chips we don't recognize. | |
541 | */ | |
d905b382 JC |
542 | if (client->driver->id == I2C_DRIVERID_OV7670) { |
543 | cam->sensor = client; | |
544 | return cafe_cam_init(cam); | |
545 | } | |
546 | return -EINVAL; | |
547 | } | |
548 | ||
549 | static int cafe_smbus_detach(struct i2c_client *client) | |
550 | { | |
551 | struct cafe_camera *cam = i2c_get_adapdata(client->adapter); | |
552 | ||
f9a76156 JC |
553 | if (cam->sensor == client) { |
554 | cafe_ctlr_stop_dma(cam); | |
555 | cafe_ctlr_power_down(cam); | |
556 | cam_err(cam, "lost the sensor!\n"); | |
d905b382 | 557 | cam->sensor = NULL; /* Bummer, no camera */ |
f9a76156 JC |
558 | cam->state = S_NOTREADY; |
559 | } | |
d905b382 JC |
560 | return 0; |
561 | } | |
562 | ||
563 | static int cafe_smbus_setup(struct cafe_camera *cam) | |
564 | { | |
565 | struct i2c_adapter *adap = &cam->i2c_adapter; | |
566 | int ret; | |
567 | ||
568 | cafe_smbus_enable_irq(cam); | |
569 | adap->id = I2C_HW_SMBUS_CAFE; | |
570 | adap->class = I2C_CLASS_CAM_DIGITAL; | |
571 | adap->owner = THIS_MODULE; | |
572 | adap->client_register = cafe_smbus_attach; | |
573 | adap->client_unregister = cafe_smbus_detach; | |
574 | adap->algo = &cafe_smbus_algo; | |
575 | strcpy(adap->name, "cafe_ccic"); | |
12a917f6 | 576 | adap->dev.parent = &cam->pdev->dev; |
d905b382 JC |
577 | i2c_set_adapdata(adap, cam); |
578 | ret = i2c_add_adapter(adap); | |
579 | if (ret) | |
580 | printk(KERN_ERR "Unable to register cafe i2c adapter\n"); | |
581 | return ret; | |
582 | } | |
583 | ||
584 | static void cafe_smbus_shutdown(struct cafe_camera *cam) | |
585 | { | |
586 | i2c_del_adapter(&cam->i2c_adapter); | |
587 | } | |
588 | ||
589 | ||
590 | /* ------------------------------------------------------------------- */ | |
591 | /* | |
592 | * Deal with the controller. | |
593 | */ | |
594 | ||
595 | /* | |
596 | * Do everything we think we need to have the interface operating | |
597 | * according to the desired format. | |
598 | */ | |
599 | static void cafe_ctlr_dma(struct cafe_camera *cam) | |
600 | { | |
601 | /* | |
602 | * Store the first two Y buffers (we aren't supporting | |
603 | * planar formats for now, so no UV bufs). Then either | |
604 | * set the third if it exists, or tell the controller | |
605 | * to just use two. | |
606 | */ | |
607 | cafe_reg_write(cam, REG_Y0BAR, cam->dma_handles[0]); | |
608 | cafe_reg_write(cam, REG_Y1BAR, cam->dma_handles[1]); | |
609 | if (cam->nbufs > 2) { | |
610 | cafe_reg_write(cam, REG_Y2BAR, cam->dma_handles[2]); | |
611 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
612 | } | |
613 | else | |
614 | cafe_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
615 | cafe_reg_write(cam, REG_UBAR, 0); /* 32 bits only for now */ | |
616 | } | |
617 | ||
618 | static void cafe_ctlr_image(struct cafe_camera *cam) | |
619 | { | |
620 | int imgsz; | |
621 | struct v4l2_pix_format *fmt = &cam->pix_format; | |
622 | ||
623 | imgsz = ((fmt->height << IMGSZ_V_SHIFT) & IMGSZ_V_MASK) | | |
624 | (fmt->bytesperline & IMGSZ_H_MASK); | |
625 | cafe_reg_write(cam, REG_IMGSIZE, imgsz); | |
626 | cafe_reg_write(cam, REG_IMGOFFSET, 0); | |
627 | /* YPITCH just drops the last two bits */ | |
628 | cafe_reg_write_mask(cam, REG_IMGPITCH, fmt->bytesperline, | |
629 | IMGP_YP_MASK); | |
630 | /* | |
631 | * Tell the controller about the image format we are using. | |
632 | */ | |
633 | switch (cam->pix_format.pixelformat) { | |
634 | case V4L2_PIX_FMT_YUYV: | |
635 | cafe_reg_write_mask(cam, REG_CTRL0, | |
636 | C0_DF_YUV|C0_YUV_PACKED|C0_YUVE_YUYV, | |
637 | C0_DF_MASK); | |
638 | break; | |
639 | ||
d905b382 JC |
640 | case V4L2_PIX_FMT_RGB444: |
641 | cafe_reg_write_mask(cam, REG_CTRL0, | |
642 | C0_DF_RGB|C0_RGBF_444|C0_RGB4_XRGB, | |
643 | C0_DF_MASK); | |
644 | /* Alpha value? */ | |
645 | break; | |
646 | ||
647 | case V4L2_PIX_FMT_RGB565: | |
648 | cafe_reg_write_mask(cam, REG_CTRL0, | |
649 | C0_DF_RGB|C0_RGBF_565|C0_RGB5_BGGR, | |
650 | C0_DF_MASK); | |
651 | break; | |
652 | ||
653 | default: | |
654 | cam_err(cam, "Unknown format %x\n", cam->pix_format.pixelformat); | |
655 | break; | |
656 | } | |
657 | /* | |
658 | * Make sure it knows we want to use hsync/vsync. | |
659 | */ | |
660 | cafe_reg_write_mask(cam, REG_CTRL0, C0_SIF_HVSYNC, | |
661 | C0_SIFM_MASK); | |
662 | } | |
663 | ||
664 | ||
665 | /* | |
666 | * Configure the controller for operation; caller holds the | |
667 | * device mutex. | |
668 | */ | |
669 | static int cafe_ctlr_configure(struct cafe_camera *cam) | |
670 | { | |
671 | unsigned long flags; | |
672 | ||
673 | spin_lock_irqsave(&cam->dev_lock, flags); | |
674 | cafe_ctlr_dma(cam); | |
675 | cafe_ctlr_image(cam); | |
676 | cafe_set_config_needed(cam, 0); | |
677 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
678 | return 0; | |
679 | } | |
680 | ||
681 | static void cafe_ctlr_irq_enable(struct cafe_camera *cam) | |
682 | { | |
683 | /* | |
684 | * Clear any pending interrupts, since we do not | |
685 | * expect to have I/O active prior to enabling. | |
686 | */ | |
687 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); | |
688 | cafe_reg_set_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
689 | } | |
690 | ||
691 | static void cafe_ctlr_irq_disable(struct cafe_camera *cam) | |
692 | { | |
693 | cafe_reg_clear_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
694 | } | |
695 | ||
696 | /* | |
697 | * Make the controller start grabbing images. Everything must | |
698 | * be set up before doing this. | |
699 | */ | |
700 | static void cafe_ctlr_start(struct cafe_camera *cam) | |
701 | { | |
702 | /* set_bit performs a read, so no other barrier should be | |
703 | needed here */ | |
704 | cafe_reg_set_bit(cam, REG_CTRL0, C0_ENABLE); | |
705 | } | |
706 | ||
707 | static void cafe_ctlr_stop(struct cafe_camera *cam) | |
708 | { | |
709 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
710 | } | |
711 | ||
712 | static void cafe_ctlr_init(struct cafe_camera *cam) | |
713 | { | |
714 | unsigned long flags; | |
715 | ||
716 | spin_lock_irqsave(&cam->dev_lock, flags); | |
717 | /* | |
718 | * Added magic to bring up the hardware on the B-Test board | |
719 | */ | |
720 | cafe_reg_write(cam, 0x3038, 0x8); | |
721 | cafe_reg_write(cam, 0x315c, 0x80008); | |
722 | /* | |
723 | * Go through the dance needed to wake the device up. | |
724 | * Note that these registers are global and shared | |
725 | * with the NAND and SD devices. Interaction between the | |
726 | * three still needs to be examined. | |
727 | */ | |
728 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRS|GCSR_MRS); /* Needed? */ | |
729 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRC); | |
730 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRS); | |
5b50ed7c JC |
731 | /* |
732 | * Here we must wait a bit for the controller to come around. | |
733 | */ | |
734 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
70cd685d | 735 | msleep(5); |
5b50ed7c JC |
736 | spin_lock_irqsave(&cam->dev_lock, flags); |
737 | ||
d905b382 JC |
738 | cafe_reg_write(cam, REG_GL_CSR, GCSR_CCIC_EN|GCSR_SRC|GCSR_MRC); |
739 | cafe_reg_set_bit(cam, REG_GL_IMASK, GIMSK_CCIC_EN); | |
740 | /* | |
741 | * Make sure it's not powered down. | |
742 | */ | |
743 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
744 | /* | |
745 | * Turn off the enable bit. It sure should be off anyway, | |
746 | * but it's good to be sure. | |
747 | */ | |
748 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
749 | /* | |
750 | * Mask all interrupts. | |
751 | */ | |
752 | cafe_reg_write(cam, REG_IRQMASK, 0); | |
753 | /* | |
754 | * Clock the sensor appropriately. Controller clock should | |
755 | * be 48MHz, sensor "typical" value is half that. | |
756 | */ | |
757 | cafe_reg_write_mask(cam, REG_CLKCTRL, 2, CLK_DIV_MASK); | |
758 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
759 | } | |
760 | ||
761 | ||
762 | /* | |
763 | * Stop the controller, and don't return until we're really sure that no | |
764 | * further DMA is going on. | |
765 | */ | |
766 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam) | |
767 | { | |
768 | unsigned long flags; | |
769 | ||
770 | /* | |
771 | * Theory: stop the camera controller (whether it is operating | |
772 | * or not). Delay briefly just in case we race with the SOF | |
773 | * interrupt, then wait until no DMA is active. | |
774 | */ | |
775 | spin_lock_irqsave(&cam->dev_lock, flags); | |
776 | cafe_ctlr_stop(cam); | |
777 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
778 | mdelay(1); | |
779 | wait_event_timeout(cam->iowait, | |
780 | !test_bit(CF_DMA_ACTIVE, &cam->flags), HZ); | |
781 | if (test_bit(CF_DMA_ACTIVE, &cam->flags)) | |
782 | cam_err(cam, "Timeout waiting for DMA to end\n"); | |
783 | /* This would be bad news - what now? */ | |
784 | spin_lock_irqsave(&cam->dev_lock, flags); | |
785 | cam->state = S_IDLE; | |
786 | cafe_ctlr_irq_disable(cam); | |
787 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
788 | } | |
789 | ||
790 | /* | |
791 | * Power up and down. | |
792 | */ | |
793 | static void cafe_ctlr_power_up(struct cafe_camera *cam) | |
794 | { | |
795 | unsigned long flags; | |
796 | ||
797 | spin_lock_irqsave(&cam->dev_lock, flags); | |
798 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
7acf90c7 JC |
799 | /* |
800 | * Part one of the sensor dance: turn the global | |
801 | * GPIO signal on. | |
802 | */ | |
803 | cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON); | |
804 | cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT|GGPIO_VAL); | |
d905b382 JC |
805 | /* |
806 | * Put the sensor into operational mode (assumes OLPC-style | |
807 | * wiring). Control 0 is reset - set to 1 to operate. | |
808 | * Control 1 is power down, set to 0 to operate. | |
809 | */ | |
f9a76156 | 810 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN); /* pwr up, reset */ |
5b50ed7c | 811 | // mdelay(1); /* Marvell says 1ms will do it */ |
d905b382 | 812 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C0); |
5b50ed7c | 813 | // mdelay(1); /* Enough? */ |
d905b382 | 814 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
7acf90c7 | 815 | msleep(5); /* Just to be sure */ |
d905b382 JC |
816 | } |
817 | ||
818 | static void cafe_ctlr_power_down(struct cafe_camera *cam) | |
819 | { | |
820 | unsigned long flags; | |
821 | ||
822 | spin_lock_irqsave(&cam->dev_lock, flags); | |
823 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C1); | |
7acf90c7 JC |
824 | cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON); |
825 | cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT); | |
d905b382 JC |
826 | cafe_reg_set_bit(cam, REG_CTRL1, C1_PWRDWN); |
827 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
828 | } | |
829 | ||
830 | /* -------------------------------------------------------------------- */ | |
831 | /* | |
832 | * Communications with the sensor. | |
833 | */ | |
834 | ||
835 | static int __cafe_cam_cmd(struct cafe_camera *cam, int cmd, void *arg) | |
836 | { | |
837 | struct i2c_client *sc = cam->sensor; | |
838 | int ret; | |
839 | ||
840 | if (sc == NULL || sc->driver == NULL || sc->driver->command == NULL) | |
841 | return -EINVAL; | |
842 | ret = sc->driver->command(sc, cmd, arg); | |
843 | if (ret == -EPERM) /* Unsupported command */ | |
844 | return 0; | |
845 | return ret; | |
846 | } | |
847 | ||
848 | static int __cafe_cam_reset(struct cafe_camera *cam) | |
849 | { | |
850 | int zero = 0; | |
851 | return __cafe_cam_cmd(cam, VIDIOC_INT_RESET, &zero); | |
852 | } | |
853 | ||
854 | /* | |
855 | * We have found the sensor on the i2c. Let's try to have a | |
856 | * conversation. | |
857 | */ | |
858 | static int cafe_cam_init(struct cafe_camera *cam) | |
859 | { | |
3434eb7e | 860 | struct v4l2_chip_ident chip = { V4L2_CHIP_MATCH_I2C_ADDR, 0, 0, 0 }; |
d905b382 JC |
861 | int ret; |
862 | ||
863 | mutex_lock(&cam->s_mutex); | |
864 | if (cam->state != S_NOTREADY) | |
865 | cam_warn(cam, "Cam init with device in funky state %d", | |
866 | cam->state); | |
867 | ret = __cafe_cam_reset(cam); | |
868 | if (ret) | |
869 | goto out; | |
3434eb7e HV |
870 | chip.match_chip = cam->sensor->addr; |
871 | ret = __cafe_cam_cmd(cam, VIDIOC_G_CHIP_IDENT, &chip); | |
d905b382 JC |
872 | if (ret) |
873 | goto out; | |
3434eb7e | 874 | cam->sensor_type = chip.ident; |
d905b382 JC |
875 | // if (cam->sensor->addr != OV7xx0_SID) { |
876 | if (cam->sensor_type != V4L2_IDENT_OV7670) { | |
877 | cam_err(cam, "Unsupported sensor type %d", cam->sensor->addr); | |
878 | ret = -EINVAL; | |
879 | goto out; | |
880 | } | |
881 | /* Get/set parameters? */ | |
882 | ret = 0; | |
883 | cam->state = S_IDLE; | |
884 | out: | |
7acf90c7 | 885 | cafe_ctlr_power_down(cam); |
d905b382 JC |
886 | mutex_unlock(&cam->s_mutex); |
887 | return ret; | |
888 | } | |
889 | ||
890 | /* | |
891 | * Configure the sensor to match the parameters we have. Caller should | |
892 | * hold s_mutex | |
893 | */ | |
894 | static int cafe_cam_set_flip(struct cafe_camera *cam) | |
895 | { | |
896 | struct v4l2_control ctrl; | |
897 | ||
898 | memset(&ctrl, 0, sizeof(ctrl)); | |
899 | ctrl.id = V4L2_CID_VFLIP; | |
900 | ctrl.value = flip; | |
901 | return __cafe_cam_cmd(cam, VIDIOC_S_CTRL, &ctrl); | |
902 | } | |
903 | ||
904 | ||
905 | static int cafe_cam_configure(struct cafe_camera *cam) | |
906 | { | |
907 | struct v4l2_format fmt; | |
908 | int ret, zero = 0; | |
909 | ||
910 | if (cam->state != S_IDLE) | |
911 | return -EINVAL; | |
912 | fmt.fmt.pix = cam->pix_format; | |
913 | ret = __cafe_cam_cmd(cam, VIDIOC_INT_INIT, &zero); | |
914 | if (ret == 0) | |
915 | ret = __cafe_cam_cmd(cam, VIDIOC_S_FMT, &fmt); | |
916 | /* | |
917 | * OV7670 does weird things if flip is set *before* format... | |
918 | */ | |
919 | ret += cafe_cam_set_flip(cam); | |
920 | return ret; | |
921 | } | |
922 | ||
923 | /* -------------------------------------------------------------------- */ | |
924 | /* | |
925 | * DMA buffer management. These functions need s_mutex held. | |
926 | */ | |
927 | ||
928 | /* FIXME: this is inefficient as hell, since dma_alloc_coherent just | |
929 | * does a get_free_pages() call, and we waste a good chunk of an orderN | |
930 | * allocation. Should try to allocate the whole set in one chunk. | |
931 | */ | |
932 | static int cafe_alloc_dma_bufs(struct cafe_camera *cam, int loadtime) | |
933 | { | |
934 | int i; | |
935 | ||
936 | cafe_set_config_needed(cam, 1); | |
937 | if (loadtime) | |
938 | cam->dma_buf_size = dma_buf_size; | |
a66d2336 | 939 | else |
d905b382 | 940 | cam->dma_buf_size = cam->pix_format.sizeimage; |
d905b382 JC |
941 | if (n_dma_bufs > 3) |
942 | n_dma_bufs = 3; | |
943 | ||
944 | cam->nbufs = 0; | |
945 | for (i = 0; i < n_dma_bufs; i++) { | |
946 | cam->dma_bufs[i] = dma_alloc_coherent(&cam->pdev->dev, | |
947 | cam->dma_buf_size, cam->dma_handles + i, | |
948 | GFP_KERNEL); | |
949 | if (cam->dma_bufs[i] == NULL) { | |
950 | cam_warn(cam, "Failed to allocate DMA buffer\n"); | |
951 | break; | |
952 | } | |
953 | /* For debug, remove eventually */ | |
954 | memset(cam->dma_bufs[i], 0xcc, cam->dma_buf_size); | |
955 | (cam->nbufs)++; | |
956 | } | |
957 | ||
958 | switch (cam->nbufs) { | |
959 | case 1: | |
960 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
961 | cam->dma_bufs[0], cam->dma_handles[0]); | |
962 | cam->nbufs = 0; | |
963 | case 0: | |
964 | cam_err(cam, "Insufficient DMA buffers, cannot operate\n"); | |
965 | return -ENOMEM; | |
966 | ||
967 | case 2: | |
968 | if (n_dma_bufs > 2) | |
969 | cam_warn(cam, "Will limp along with only 2 buffers\n"); | |
970 | break; | |
971 | } | |
972 | return 0; | |
973 | } | |
974 | ||
975 | static void cafe_free_dma_bufs(struct cafe_camera *cam) | |
976 | { | |
977 | int i; | |
978 | ||
979 | for (i = 0; i < cam->nbufs; i++) { | |
980 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
981 | cam->dma_bufs[i], cam->dma_handles[i]); | |
982 | cam->dma_bufs[i] = NULL; | |
983 | } | |
984 | cam->nbufs = 0; | |
985 | } | |
986 | ||
987 | ||
988 | ||
989 | ||
990 | ||
991 | /* ----------------------------------------------------------------------- */ | |
992 | /* | |
993 | * Here starts the V4L2 interface code. | |
994 | */ | |
995 | ||
996 | /* | |
997 | * Read an image from the device. | |
998 | */ | |
999 | static ssize_t cafe_deliver_buffer(struct cafe_camera *cam, | |
1000 | char __user *buffer, size_t len, loff_t *pos) | |
1001 | { | |
1002 | int bufno; | |
1003 | unsigned long flags; | |
1004 | ||
1005 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1006 | if (cam->next_buf < 0) { | |
1007 | cam_err(cam, "deliver_buffer: No next buffer\n"); | |
1008 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1009 | return -EIO; | |
1010 | } | |
1011 | bufno = cam->next_buf; | |
1012 | clear_bit(bufno, &cam->flags); | |
1013 | if (++(cam->next_buf) >= cam->nbufs) | |
1014 | cam->next_buf = 0; | |
1015 | if (! test_bit(cam->next_buf, &cam->flags)) | |
1016 | cam->next_buf = -1; | |
1017 | cam->specframes = 0; | |
1018 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1019 | ||
1020 | if (len > cam->pix_format.sizeimage) | |
1021 | len = cam->pix_format.sizeimage; | |
1022 | if (copy_to_user(buffer, cam->dma_bufs[bufno], len)) | |
1023 | return -EFAULT; | |
1024 | (*pos) += len; | |
1025 | return len; | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Get everything ready, and start grabbing frames. | |
1030 | */ | |
1031 | static int cafe_read_setup(struct cafe_camera *cam, enum cafe_state state) | |
1032 | { | |
1033 | int ret; | |
1034 | unsigned long flags; | |
1035 | ||
1036 | /* | |
1037 | * Configuration. If we still don't have DMA buffers, | |
1038 | * make one last, desperate attempt. | |
1039 | */ | |
1040 | if (cam->nbufs == 0) | |
1041 | if (cafe_alloc_dma_bufs(cam, 0)) | |
1042 | return -ENOMEM; | |
1043 | ||
1044 | if (cafe_needs_config(cam)) { | |
1045 | cafe_cam_configure(cam); | |
1046 | ret = cafe_ctlr_configure(cam); | |
1047 | if (ret) | |
1048 | return ret; | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * Turn it loose. | |
1053 | */ | |
1054 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1055 | cafe_reset_buffers(cam); | |
1056 | cafe_ctlr_irq_enable(cam); | |
1057 | cam->state = state; | |
1058 | cafe_ctlr_start(cam); | |
1059 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | ||
1064 | static ssize_t cafe_v4l_read(struct file *filp, | |
1065 | char __user *buffer, size_t len, loff_t *pos) | |
1066 | { | |
1067 | struct cafe_camera *cam = filp->private_data; | |
b9109b75 | 1068 | int ret = 0; |
d905b382 JC |
1069 | |
1070 | /* | |
1071 | * Perhaps we're in speculative read mode and already | |
1072 | * have data? | |
1073 | */ | |
1074 | mutex_lock(&cam->s_mutex); | |
1075 | if (cam->state == S_SPECREAD) { | |
1076 | if (cam->next_buf >= 0) { | |
1077 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
1078 | if (ret != 0) | |
1079 | goto out_unlock; | |
1080 | } | |
1081 | } else if (cam->state == S_FLAKED || cam->state == S_NOTREADY) { | |
1082 | ret = -EIO; | |
1083 | goto out_unlock; | |
1084 | } else if (cam->state != S_IDLE) { | |
1085 | ret = -EBUSY; | |
1086 | goto out_unlock; | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * v4l2: multiple processes can open the device, but only | |
1091 | * one gets to grab data from it. | |
1092 | */ | |
1093 | if (cam->owner && cam->owner != filp) { | |
1094 | ret = -EBUSY; | |
1095 | goto out_unlock; | |
1096 | } | |
1097 | cam->owner = filp; | |
1098 | ||
1099 | /* | |
1100 | * Do setup if need be. | |
1101 | */ | |
1102 | if (cam->state != S_SPECREAD) { | |
1103 | ret = cafe_read_setup(cam, S_SINGLEREAD); | |
1104 | if (ret) | |
1105 | goto out_unlock; | |
1106 | } | |
1107 | /* | |
1108 | * Wait for something to happen. This should probably | |
1109 | * be interruptible (FIXME). | |
1110 | */ | |
1111 | wait_event_timeout(cam->iowait, cam->next_buf >= 0, HZ); | |
1112 | if (cam->next_buf < 0) { | |
1113 | cam_err(cam, "read() operation timed out\n"); | |
1114 | cafe_ctlr_stop_dma(cam); | |
1115 | ret = -EIO; | |
1116 | goto out_unlock; | |
1117 | } | |
1118 | /* | |
1119 | * Give them their data and we should be done. | |
1120 | */ | |
1121 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
1122 | ||
1123 | out_unlock: | |
1124 | mutex_unlock(&cam->s_mutex); | |
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | ||
1129 | ||
1130 | ||
1131 | ||
1132 | ||
1133 | ||
1134 | ||
1135 | /* | |
1136 | * Streaming I/O support. | |
1137 | */ | |
1138 | ||
1139 | ||
1140 | ||
1141 | static int cafe_vidioc_streamon(struct file *filp, void *priv, | |
1142 | enum v4l2_buf_type type) | |
1143 | { | |
1144 | struct cafe_camera *cam = filp->private_data; | |
1145 | int ret = -EINVAL; | |
1146 | ||
1147 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1148 | goto out; | |
1149 | mutex_lock(&cam->s_mutex); | |
1150 | if (cam->state != S_IDLE || cam->n_sbufs == 0) | |
1151 | goto out_unlock; | |
1152 | ||
1153 | cam->sequence = 0; | |
1154 | ret = cafe_read_setup(cam, S_STREAMING); | |
1155 | ||
1156 | out_unlock: | |
1157 | mutex_unlock(&cam->s_mutex); | |
1158 | out: | |
1159 | return ret; | |
1160 | } | |
1161 | ||
1162 | ||
1163 | static int cafe_vidioc_streamoff(struct file *filp, void *priv, | |
1164 | enum v4l2_buf_type type) | |
1165 | { | |
1166 | struct cafe_camera *cam = filp->private_data; | |
1167 | int ret = -EINVAL; | |
1168 | ||
1169 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1170 | goto out; | |
1171 | mutex_lock(&cam->s_mutex); | |
1172 | if (cam->state != S_STREAMING) | |
1173 | goto out_unlock; | |
1174 | ||
1175 | cafe_ctlr_stop_dma(cam); | |
1176 | ret = 0; | |
1177 | ||
1178 | out_unlock: | |
1179 | mutex_unlock(&cam->s_mutex); | |
1180 | out: | |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | ||
1185 | ||
1186 | static int cafe_setup_siobuf(struct cafe_camera *cam, int index) | |
1187 | { | |
1188 | struct cafe_sio_buffer *buf = cam->sb_bufs + index; | |
1189 | ||
1190 | INIT_LIST_HEAD(&buf->list); | |
1191 | buf->v4lbuf.length = PAGE_ALIGN(cam->pix_format.sizeimage); | |
1192 | buf->buffer = vmalloc_user(buf->v4lbuf.length); | |
1193 | if (buf->buffer == NULL) | |
1194 | return -ENOMEM; | |
1195 | buf->mapcount = 0; | |
1196 | buf->cam = cam; | |
1197 | ||
1198 | buf->v4lbuf.index = index; | |
1199 | buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1200 | buf->v4lbuf.field = V4L2_FIELD_NONE; | |
1201 | buf->v4lbuf.memory = V4L2_MEMORY_MMAP; | |
1202 | /* | |
c1accaa2 | 1203 | * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg |
d905b382 JC |
1204 | * just uses the length times the index, but the spec warns |
1205 | * against doing just that - vma merging problems. So we | |
1206 | * leave a gap between each pair of buffers. | |
1207 | */ | |
1208 | buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length; | |
1209 | return 0; | |
1210 | } | |
1211 | ||
1212 | static int cafe_free_sio_buffers(struct cafe_camera *cam) | |
1213 | { | |
1214 | int i; | |
1215 | ||
1216 | /* | |
1217 | * If any buffers are mapped, we cannot free them at all. | |
1218 | */ | |
1219 | for (i = 0; i < cam->n_sbufs; i++) | |
1220 | if (cam->sb_bufs[i].mapcount > 0) | |
1221 | return -EBUSY; | |
1222 | /* | |
1223 | * OK, let's do it. | |
1224 | */ | |
1225 | for (i = 0; i < cam->n_sbufs; i++) | |
1226 | vfree(cam->sb_bufs[i].buffer); | |
1227 | cam->n_sbufs = 0; | |
1228 | kfree(cam->sb_bufs); | |
1229 | cam->sb_bufs = NULL; | |
1230 | INIT_LIST_HEAD(&cam->sb_avail); | |
1231 | INIT_LIST_HEAD(&cam->sb_full); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | ||
1236 | ||
1237 | static int cafe_vidioc_reqbufs(struct file *filp, void *priv, | |
1238 | struct v4l2_requestbuffers *req) | |
1239 | { | |
1240 | struct cafe_camera *cam = filp->private_data; | |
3198cf67 | 1241 | int ret = 0; /* Silence warning */ |
d905b382 JC |
1242 | |
1243 | /* | |
1244 | * Make sure it's something we can do. User pointers could be | |
1245 | * implemented without great pain, but that's not been done yet. | |
1246 | */ | |
1247 | if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1248 | return -EINVAL; | |
1249 | if (req->memory != V4L2_MEMORY_MMAP) | |
1250 | return -EINVAL; | |
1251 | /* | |
1252 | * If they ask for zero buffers, they really want us to stop streaming | |
1253 | * (if it's happening) and free everything. Should we check owner? | |
1254 | */ | |
1255 | mutex_lock(&cam->s_mutex); | |
1256 | if (req->count == 0) { | |
1257 | if (cam->state == S_STREAMING) | |
1258 | cafe_ctlr_stop_dma(cam); | |
1259 | ret = cafe_free_sio_buffers (cam); | |
1260 | goto out; | |
1261 | } | |
1262 | /* | |
1263 | * Device needs to be idle and working. We *could* try to do the | |
1264 | * right thing in S_SPECREAD by shutting things down, but it | |
1265 | * probably doesn't matter. | |
1266 | */ | |
1267 | if (cam->state != S_IDLE || (cam->owner && cam->owner != filp)) { | |
1268 | ret = -EBUSY; | |
1269 | goto out; | |
1270 | } | |
1271 | cam->owner = filp; | |
1272 | ||
1273 | if (req->count < min_buffers) | |
1274 | req->count = min_buffers; | |
1275 | else if (req->count > max_buffers) | |
1276 | req->count = max_buffers; | |
1277 | if (cam->n_sbufs > 0) { | |
1278 | ret = cafe_free_sio_buffers(cam); | |
1279 | if (ret) | |
1280 | goto out; | |
1281 | } | |
1282 | ||
1283 | cam->sb_bufs = kzalloc(req->count*sizeof(struct cafe_sio_buffer), | |
1284 | GFP_KERNEL); | |
1285 | if (cam->sb_bufs == NULL) { | |
1286 | ret = -ENOMEM; | |
1287 | goto out; | |
1288 | } | |
1289 | for (cam->n_sbufs = 0; cam->n_sbufs < req->count; (cam->n_sbufs++)) { | |
1290 | ret = cafe_setup_siobuf(cam, cam->n_sbufs); | |
1291 | if (ret) | |
1292 | break; | |
1293 | } | |
1294 | ||
1295 | if (cam->n_sbufs == 0) /* no luck at all - ret already set */ | |
1296 | kfree(cam->sb_bufs); | |
d905b382 JC |
1297 | req->count = cam->n_sbufs; /* In case of partial success */ |
1298 | ||
1299 | out: | |
1300 | mutex_unlock(&cam->s_mutex); | |
1301 | return ret; | |
1302 | } | |
1303 | ||
1304 | ||
1305 | static int cafe_vidioc_querybuf(struct file *filp, void *priv, | |
1306 | struct v4l2_buffer *buf) | |
1307 | { | |
1308 | struct cafe_camera *cam = filp->private_data; | |
1309 | int ret = -EINVAL; | |
1310 | ||
1311 | mutex_lock(&cam->s_mutex); | |
1312 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1313 | goto out; | |
1314 | if (buf->index < 0 || buf->index >= cam->n_sbufs) | |
1315 | goto out; | |
1316 | *buf = cam->sb_bufs[buf->index].v4lbuf; | |
1317 | ret = 0; | |
1318 | out: | |
1319 | mutex_unlock(&cam->s_mutex); | |
1320 | return ret; | |
1321 | } | |
1322 | ||
1323 | static int cafe_vidioc_qbuf(struct file *filp, void *priv, | |
1324 | struct v4l2_buffer *buf) | |
1325 | { | |
1326 | struct cafe_camera *cam = filp->private_data; | |
1327 | struct cafe_sio_buffer *sbuf; | |
1328 | int ret = -EINVAL; | |
1329 | unsigned long flags; | |
1330 | ||
1331 | mutex_lock(&cam->s_mutex); | |
1332 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1333 | goto out; | |
1334 | if (buf->index < 0 || buf->index >= cam->n_sbufs) | |
1335 | goto out; | |
1336 | sbuf = cam->sb_bufs + buf->index; | |
1337 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) { | |
1338 | ret = 0; /* Already queued?? */ | |
1339 | goto out; | |
1340 | } | |
1341 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_DONE) { | |
1342 | /* Spec doesn't say anything, seems appropriate tho */ | |
1343 | ret = -EBUSY; | |
1344 | goto out; | |
1345 | } | |
1346 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED; | |
1347 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1348 | list_add(&sbuf->list, &cam->sb_avail); | |
1349 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1350 | ret = 0; | |
1351 | out: | |
1352 | mutex_unlock(&cam->s_mutex); | |
1353 | return ret; | |
1354 | } | |
1355 | ||
1356 | static int cafe_vidioc_dqbuf(struct file *filp, void *priv, | |
1357 | struct v4l2_buffer *buf) | |
1358 | { | |
1359 | struct cafe_camera *cam = filp->private_data; | |
1360 | struct cafe_sio_buffer *sbuf; | |
1361 | int ret = -EINVAL; | |
1362 | unsigned long flags; | |
1363 | ||
1364 | mutex_lock(&cam->s_mutex); | |
1365 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1366 | goto out_unlock; | |
1367 | if (cam->state != S_STREAMING) | |
1368 | goto out_unlock; | |
1369 | if (list_empty(&cam->sb_full) && filp->f_flags & O_NONBLOCK) { | |
1370 | ret = -EAGAIN; | |
1371 | goto out_unlock; | |
1372 | } | |
1373 | ||
1374 | while (list_empty(&cam->sb_full) && cam->state == S_STREAMING) { | |
1375 | mutex_unlock(&cam->s_mutex); | |
1376 | if (wait_event_interruptible(cam->iowait, | |
1377 | !list_empty(&cam->sb_full))) { | |
1378 | ret = -ERESTARTSYS; | |
1379 | goto out; | |
1380 | } | |
1381 | mutex_lock(&cam->s_mutex); | |
1382 | } | |
1383 | ||
1384 | if (cam->state != S_STREAMING) | |
1385 | ret = -EINTR; | |
1386 | else { | |
1387 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1388 | /* Should probably recheck !list_empty() here */ | |
1389 | sbuf = list_entry(cam->sb_full.next, | |
1390 | struct cafe_sio_buffer, list); | |
1391 | list_del_init(&sbuf->list); | |
1392 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1393 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE; | |
1394 | *buf = sbuf->v4lbuf; | |
1395 | ret = 0; | |
1396 | } | |
1397 | ||
1398 | out_unlock: | |
1399 | mutex_unlock(&cam->s_mutex); | |
1400 | out: | |
1401 | return ret; | |
1402 | } | |
1403 | ||
1404 | ||
1405 | ||
1406 | static void cafe_v4l_vm_open(struct vm_area_struct *vma) | |
1407 | { | |
1408 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1409 | /* | |
1410 | * Locking: done under mmap_sem, so we don't need to | |
1411 | * go back to the camera lock here. | |
1412 | */ | |
1413 | sbuf->mapcount++; | |
1414 | } | |
1415 | ||
1416 | ||
1417 | static void cafe_v4l_vm_close(struct vm_area_struct *vma) | |
1418 | { | |
1419 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1420 | ||
1421 | mutex_lock(&sbuf->cam->s_mutex); | |
1422 | sbuf->mapcount--; | |
1423 | /* Docs say we should stop I/O too... */ | |
1424 | if (sbuf->mapcount == 0) | |
1425 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
1426 | mutex_unlock(&sbuf->cam->s_mutex); | |
1427 | } | |
1428 | ||
1429 | static struct vm_operations_struct cafe_v4l_vm_ops = { | |
1430 | .open = cafe_v4l_vm_open, | |
1431 | .close = cafe_v4l_vm_close | |
1432 | }; | |
1433 | ||
1434 | ||
1435 | static int cafe_v4l_mmap(struct file *filp, struct vm_area_struct *vma) | |
1436 | { | |
1437 | struct cafe_camera *cam = filp->private_data; | |
1438 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
1439 | int ret = -EINVAL; | |
1440 | int i; | |
1441 | struct cafe_sio_buffer *sbuf = NULL; | |
1442 | ||
1443 | if (! (vma->vm_flags & VM_WRITE) || ! (vma->vm_flags & VM_SHARED)) | |
1444 | return -EINVAL; | |
1445 | /* | |
1446 | * Find the buffer they are looking for. | |
1447 | */ | |
1448 | mutex_lock(&cam->s_mutex); | |
1449 | for (i = 0; i < cam->n_sbufs; i++) | |
1450 | if (cam->sb_bufs[i].v4lbuf.m.offset == offset) { | |
1451 | sbuf = cam->sb_bufs + i; | |
1452 | break; | |
1453 | } | |
1454 | if (sbuf == NULL) | |
1455 | goto out; | |
1456 | ||
1457 | ret = remap_vmalloc_range(vma, sbuf->buffer, 0); | |
1458 | if (ret) | |
1459 | goto out; | |
1460 | vma->vm_flags |= VM_DONTEXPAND; | |
1461 | vma->vm_private_data = sbuf; | |
1462 | vma->vm_ops = &cafe_v4l_vm_ops; | |
1463 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED; | |
1464 | cafe_v4l_vm_open(vma); | |
1465 | ret = 0; | |
1466 | out: | |
1467 | mutex_unlock(&cam->s_mutex); | |
1468 | return ret; | |
1469 | } | |
1470 | ||
1471 | ||
1472 | ||
1473 | static int cafe_v4l_open(struct inode *inode, struct file *filp) | |
1474 | { | |
1475 | struct cafe_camera *cam; | |
1476 | ||
1477 | cam = cafe_find_dev(iminor(inode)); | |
1478 | if (cam == NULL) | |
1479 | return -ENODEV; | |
1480 | filp->private_data = cam; | |
1481 | ||
1482 | mutex_lock(&cam->s_mutex); | |
1483 | if (cam->users == 0) { | |
1484 | cafe_ctlr_power_up(cam); | |
1485 | __cafe_cam_reset(cam); | |
1486 | cafe_set_config_needed(cam, 1); | |
1487 | /* FIXME make sure this is complete */ | |
1488 | } | |
1489 | (cam->users)++; | |
1490 | mutex_unlock(&cam->s_mutex); | |
1491 | return 0; | |
1492 | } | |
1493 | ||
1494 | ||
1495 | static int cafe_v4l_release(struct inode *inode, struct file *filp) | |
1496 | { | |
1497 | struct cafe_camera *cam = filp->private_data; | |
1498 | ||
1499 | mutex_lock(&cam->s_mutex); | |
1500 | (cam->users)--; | |
1501 | if (filp == cam->owner) { | |
1502 | cafe_ctlr_stop_dma(cam); | |
1503 | cafe_free_sio_buffers(cam); | |
1504 | cam->owner = NULL; | |
1505 | } | |
f9a76156 | 1506 | if (cam->users == 0) { |
d905b382 | 1507 | cafe_ctlr_power_down(cam); |
23869e23 | 1508 | if (alloc_bufs_at_read) |
f9a76156 JC |
1509 | cafe_free_dma_bufs(cam); |
1510 | } | |
d905b382 JC |
1511 | mutex_unlock(&cam->s_mutex); |
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | ||
1516 | ||
1517 | static unsigned int cafe_v4l_poll(struct file *filp, | |
1518 | struct poll_table_struct *pt) | |
1519 | { | |
1520 | struct cafe_camera *cam = filp->private_data; | |
1521 | ||
1522 | poll_wait(filp, &cam->iowait, pt); | |
1523 | if (cam->next_buf >= 0) | |
1524 | return POLLIN | POLLRDNORM; | |
1525 | return 0; | |
1526 | } | |
1527 | ||
1528 | ||
1529 | ||
1530 | static int cafe_vidioc_queryctrl(struct file *filp, void *priv, | |
1531 | struct v4l2_queryctrl *qc) | |
1532 | { | |
1533 | struct cafe_camera *cam = filp->private_data; | |
1534 | int ret; | |
1535 | ||
1536 | mutex_lock(&cam->s_mutex); | |
1537 | ret = __cafe_cam_cmd(cam, VIDIOC_QUERYCTRL, qc); | |
1538 | mutex_unlock(&cam->s_mutex); | |
1539 | return ret; | |
1540 | } | |
1541 | ||
1542 | ||
1543 | static int cafe_vidioc_g_ctrl(struct file *filp, void *priv, | |
1544 | struct v4l2_control *ctrl) | |
1545 | { | |
1546 | struct cafe_camera *cam = filp->private_data; | |
1547 | int ret; | |
1548 | ||
1549 | mutex_lock(&cam->s_mutex); | |
1550 | ret = __cafe_cam_cmd(cam, VIDIOC_G_CTRL, ctrl); | |
1551 | mutex_unlock(&cam->s_mutex); | |
1552 | return ret; | |
1553 | } | |
1554 | ||
1555 | ||
1556 | static int cafe_vidioc_s_ctrl(struct file *filp, void *priv, | |
1557 | struct v4l2_control *ctrl) | |
1558 | { | |
1559 | struct cafe_camera *cam = filp->private_data; | |
1560 | int ret; | |
1561 | ||
1562 | mutex_lock(&cam->s_mutex); | |
1563 | ret = __cafe_cam_cmd(cam, VIDIOC_S_CTRL, ctrl); | |
1564 | mutex_unlock(&cam->s_mutex); | |
1565 | return ret; | |
1566 | } | |
1567 | ||
1568 | ||
1569 | ||
1570 | ||
1571 | ||
1572 | static int cafe_vidioc_querycap(struct file *file, void *priv, | |
1573 | struct v4l2_capability *cap) | |
1574 | { | |
1575 | strcpy(cap->driver, "cafe_ccic"); | |
1576 | strcpy(cap->card, "cafe_ccic"); | |
1577 | cap->version = CAFE_VERSION; | |
1578 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | | |
1579 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; | |
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | ||
1584 | /* | |
1585 | * The default format we use until somebody says otherwise. | |
1586 | */ | |
1587 | static struct v4l2_pix_format cafe_def_pix_format = { | |
1588 | .width = VGA_WIDTH, | |
1589 | .height = VGA_HEIGHT, | |
1590 | .pixelformat = V4L2_PIX_FMT_YUYV, | |
1591 | .field = V4L2_FIELD_NONE, | |
1592 | .bytesperline = VGA_WIDTH*2, | |
1593 | .sizeimage = VGA_WIDTH*VGA_HEIGHT*2, | |
1594 | }; | |
1595 | ||
1596 | static int cafe_vidioc_enum_fmt_cap(struct file *filp, | |
1597 | void *priv, struct v4l2_fmtdesc *fmt) | |
1598 | { | |
1599 | struct cafe_camera *cam = priv; | |
1600 | int ret; | |
1601 | ||
1602 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1603 | return -EINVAL; | |
1604 | mutex_lock(&cam->s_mutex); | |
1605 | ret = __cafe_cam_cmd(cam, VIDIOC_ENUM_FMT, fmt); | |
1606 | mutex_unlock(&cam->s_mutex); | |
1607 | return ret; | |
1608 | } | |
1609 | ||
1610 | ||
1611 | static int cafe_vidioc_try_fmt_cap (struct file *filp, void *priv, | |
1612 | struct v4l2_format *fmt) | |
1613 | { | |
1614 | struct cafe_camera *cam = priv; | |
1615 | int ret; | |
1616 | ||
1617 | mutex_lock(&cam->s_mutex); | |
1618 | ret = __cafe_cam_cmd(cam, VIDIOC_TRY_FMT, fmt); | |
1619 | mutex_unlock(&cam->s_mutex); | |
1620 | return ret; | |
1621 | } | |
1622 | ||
1623 | static int cafe_vidioc_s_fmt_cap(struct file *filp, void *priv, | |
1624 | struct v4l2_format *fmt) | |
1625 | { | |
1626 | struct cafe_camera *cam = priv; | |
1627 | int ret; | |
1628 | ||
1629 | /* | |
1630 | * Can't do anything if the device is not idle | |
1631 | * Also can't if there are streaming buffers in place. | |
1632 | */ | |
1633 | if (cam->state != S_IDLE || cam->n_sbufs > 0) | |
1634 | return -EBUSY; | |
1635 | /* | |
1636 | * See if the formatting works in principle. | |
1637 | */ | |
1638 | ret = cafe_vidioc_try_fmt_cap(filp, priv, fmt); | |
1639 | if (ret) | |
1640 | return ret; | |
1641 | /* | |
1642 | * Now we start to change things for real, so let's do it | |
1643 | * under lock. | |
1644 | */ | |
1645 | mutex_lock(&cam->s_mutex); | |
1646 | cam->pix_format = fmt->fmt.pix; | |
1647 | /* | |
1648 | * Make sure we have appropriate DMA buffers. | |
1649 | */ | |
1650 | ret = -ENOMEM; | |
1651 | if (cam->nbufs > 0 && cam->dma_buf_size < cam->pix_format.sizeimage) | |
1652 | cafe_free_dma_bufs(cam); | |
1653 | if (cam->nbufs == 0) { | |
1654 | if (cafe_alloc_dma_bufs(cam, 0)) | |
1655 | goto out; | |
1656 | } | |
1657 | /* | |
1658 | * It looks like this might work, so let's program the sensor. | |
1659 | */ | |
1660 | ret = cafe_cam_configure(cam); | |
1661 | if (! ret) | |
1662 | ret = cafe_ctlr_configure(cam); | |
1663 | out: | |
1664 | mutex_unlock(&cam->s_mutex); | |
1665 | return ret; | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * Return our stored notion of how the camera is/should be configured. | |
1670 | * The V4l2 spec wants us to be smarter, and actually get this from | |
1671 | * the camera (and not mess with it at open time). Someday. | |
1672 | */ | |
1673 | static int cafe_vidioc_g_fmt_cap(struct file *filp, void *priv, | |
1674 | struct v4l2_format *f) | |
1675 | { | |
1676 | struct cafe_camera *cam = priv; | |
1677 | ||
1678 | f->fmt.pix = cam->pix_format; | |
1679 | return 0; | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * We only have one input - the sensor - so minimize the nonsense here. | |
1684 | */ | |
1685 | static int cafe_vidioc_enum_input(struct file *filp, void *priv, | |
1686 | struct v4l2_input *input) | |
1687 | { | |
1688 | if (input->index != 0) | |
1689 | return -EINVAL; | |
1690 | ||
1691 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1692 | input->std = V4L2_STD_ALL; /* Not sure what should go here */ | |
1693 | strcpy(input->name, "Camera"); | |
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | static int cafe_vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
1698 | { | |
1699 | *i = 0; | |
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | static int cafe_vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
1704 | { | |
1705 | if (i != 0) | |
1706 | return -EINVAL; | |
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | /* from vivi.c */ | |
e75f9cee | 1711 | static int cafe_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a) |
d905b382 JC |
1712 | { |
1713 | return 0; | |
1714 | } | |
1715 | ||
c8f5b2f5 JC |
1716 | /* |
1717 | * G/S_PARM. Most of this is done by the sensor, but we are | |
1718 | * the level which controls the number of read buffers. | |
1719 | */ | |
1720 | static int cafe_vidioc_g_parm(struct file *filp, void *priv, | |
1721 | struct v4l2_streamparm *parms) | |
1722 | { | |
1723 | struct cafe_camera *cam = priv; | |
1724 | int ret; | |
1725 | ||
1726 | mutex_lock(&cam->s_mutex); | |
1727 | ret = __cafe_cam_cmd(cam, VIDIOC_G_PARM, parms); | |
1728 | mutex_unlock(&cam->s_mutex); | |
1729 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1730 | return ret; | |
1731 | } | |
1732 | ||
1733 | static int cafe_vidioc_s_parm(struct file *filp, void *priv, | |
1734 | struct v4l2_streamparm *parms) | |
1735 | { | |
1736 | struct cafe_camera *cam = priv; | |
1737 | int ret; | |
1738 | ||
1739 | mutex_lock(&cam->s_mutex); | |
1740 | ret = __cafe_cam_cmd(cam, VIDIOC_S_PARM, parms); | |
1741 | mutex_unlock(&cam->s_mutex); | |
1742 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1743 | return ret; | |
1744 | } | |
1745 | ||
1746 | ||
ab33668f | 1747 | static void cafe_v4l_dev_release(struct video_device *vd) |
d905b382 JC |
1748 | { |
1749 | struct cafe_camera *cam = container_of(vd, struct cafe_camera, v4ldev); | |
1750 | ||
1751 | kfree(cam); | |
1752 | } | |
1753 | ||
1754 | ||
1755 | /* | |
1756 | * This template device holds all of those v4l2 methods; we | |
1757 | * clone it for specific real devices. | |
1758 | */ | |
1759 | ||
fa027c2a | 1760 | static const struct file_operations cafe_v4l_fops = { |
d905b382 JC |
1761 | .owner = THIS_MODULE, |
1762 | .open = cafe_v4l_open, | |
1763 | .release = cafe_v4l_release, | |
1764 | .read = cafe_v4l_read, | |
1765 | .poll = cafe_v4l_poll, | |
1766 | .mmap = cafe_v4l_mmap, | |
1767 | .ioctl = video_ioctl2, | |
1768 | .llseek = no_llseek, | |
1769 | }; | |
1770 | ||
1771 | static struct video_device cafe_v4l_template = { | |
1772 | .name = "cafe", | |
1773 | .type = VFL_TYPE_GRABBER, | |
1774 | .type2 = VID_TYPE_CAPTURE, | |
1775 | .minor = -1, /* Get one dynamically */ | |
e75f9cee | 1776 | .tvnorms = V4L2_STD_NTSC_M, |
d905b382 JC |
1777 | .current_norm = V4L2_STD_NTSC_M, /* make mplayer happy */ |
1778 | ||
1779 | .fops = &cafe_v4l_fops, | |
1780 | .release = cafe_v4l_dev_release, | |
1781 | ||
1782 | .vidioc_querycap = cafe_vidioc_querycap, | |
1783 | .vidioc_enum_fmt_cap = cafe_vidioc_enum_fmt_cap, | |
1784 | .vidioc_try_fmt_cap = cafe_vidioc_try_fmt_cap, | |
1785 | .vidioc_s_fmt_cap = cafe_vidioc_s_fmt_cap, | |
1786 | .vidioc_g_fmt_cap = cafe_vidioc_g_fmt_cap, | |
1787 | .vidioc_enum_input = cafe_vidioc_enum_input, | |
1788 | .vidioc_g_input = cafe_vidioc_g_input, | |
1789 | .vidioc_s_input = cafe_vidioc_s_input, | |
1790 | .vidioc_s_std = cafe_vidioc_s_std, | |
1791 | .vidioc_reqbufs = cafe_vidioc_reqbufs, | |
1792 | .vidioc_querybuf = cafe_vidioc_querybuf, | |
1793 | .vidioc_qbuf = cafe_vidioc_qbuf, | |
1794 | .vidioc_dqbuf = cafe_vidioc_dqbuf, | |
1795 | .vidioc_streamon = cafe_vidioc_streamon, | |
1796 | .vidioc_streamoff = cafe_vidioc_streamoff, | |
1797 | .vidioc_queryctrl = cafe_vidioc_queryctrl, | |
1798 | .vidioc_g_ctrl = cafe_vidioc_g_ctrl, | |
1799 | .vidioc_s_ctrl = cafe_vidioc_s_ctrl, | |
c8f5b2f5 JC |
1800 | .vidioc_g_parm = cafe_vidioc_g_parm, |
1801 | .vidioc_s_parm = cafe_vidioc_s_parm, | |
d905b382 JC |
1802 | }; |
1803 | ||
1804 | ||
1805 | ||
1806 | ||
1807 | ||
1808 | ||
1809 | ||
1810 | /* ---------------------------------------------------------------------- */ | |
1811 | /* | |
1812 | * Interrupt handler stuff | |
1813 | */ | |
1814 | ||
d905b382 JC |
1815 | |
1816 | ||
1817 | static void cafe_frame_tasklet(unsigned long data) | |
1818 | { | |
1819 | struct cafe_camera *cam = (struct cafe_camera *) data; | |
1820 | int i; | |
1821 | unsigned long flags; | |
1822 | struct cafe_sio_buffer *sbuf; | |
1823 | ||
1824 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1825 | for (i = 0; i < cam->nbufs; i++) { | |
1826 | int bufno = cam->next_buf; | |
1827 | if (bufno < 0) { /* "will never happen" */ | |
1828 | cam_err(cam, "No valid bufs in tasklet!\n"); | |
1829 | break; | |
1830 | } | |
1831 | if (++(cam->next_buf) >= cam->nbufs) | |
1832 | cam->next_buf = 0; | |
1833 | if (! test_bit(bufno, &cam->flags)) | |
1834 | continue; | |
1835 | if (list_empty(&cam->sb_avail)) | |
1836 | break; /* Leave it valid, hope for better later */ | |
1837 | clear_bit(bufno, &cam->flags); | |
d905b382 JC |
1838 | sbuf = list_entry(cam->sb_avail.next, |
1839 | struct cafe_sio_buffer, list); | |
5b50ed7c JC |
1840 | /* |
1841 | * Drop the lock during the big copy. This *should* be safe... | |
1842 | */ | |
1843 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
a66d2336 JC |
1844 | memcpy(sbuf->buffer, cam->dma_bufs[bufno], |
1845 | cam->pix_format.sizeimage); | |
d905b382 JC |
1846 | sbuf->v4lbuf.bytesused = cam->pix_format.sizeimage; |
1847 | sbuf->v4lbuf.sequence = cam->buf_seq[bufno]; | |
1848 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
1849 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE; | |
5b50ed7c | 1850 | spin_lock_irqsave(&cam->dev_lock, flags); |
d905b382 JC |
1851 | list_move_tail(&sbuf->list, &cam->sb_full); |
1852 | } | |
1853 | if (! list_empty(&cam->sb_full)) | |
1854 | wake_up(&cam->iowait); | |
1855 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1856 | } | |
1857 | ||
1858 | ||
1859 | ||
1860 | static void cafe_frame_complete(struct cafe_camera *cam, int frame) | |
1861 | { | |
1862 | /* | |
1863 | * Basic frame housekeeping. | |
1864 | */ | |
1865 | if (test_bit(frame, &cam->flags) && printk_ratelimit()) | |
1866 | cam_err(cam, "Frame overrun on %d, frames lost\n", frame); | |
1867 | set_bit(frame, &cam->flags); | |
1868 | clear_bit(CF_DMA_ACTIVE, &cam->flags); | |
1869 | if (cam->next_buf < 0) | |
1870 | cam->next_buf = frame; | |
1871 | cam->buf_seq[frame] = ++(cam->sequence); | |
1872 | ||
1873 | switch (cam->state) { | |
1874 | /* | |
1875 | * If in single read mode, try going speculative. | |
1876 | */ | |
1877 | case S_SINGLEREAD: | |
1878 | cam->state = S_SPECREAD; | |
1879 | cam->specframes = 0; | |
1880 | wake_up(&cam->iowait); | |
1881 | break; | |
1882 | ||
1883 | /* | |
1884 | * If we are already doing speculative reads, and nobody is | |
1885 | * reading them, just stop. | |
1886 | */ | |
1887 | case S_SPECREAD: | |
1888 | if (++(cam->specframes) >= cam->nbufs) { | |
1889 | cafe_ctlr_stop(cam); | |
1890 | cafe_ctlr_irq_disable(cam); | |
1891 | cam->state = S_IDLE; | |
1892 | } | |
1893 | wake_up(&cam->iowait); | |
1894 | break; | |
1895 | /* | |
1896 | * For the streaming case, we defer the real work to the | |
1897 | * camera tasklet. | |
1898 | * | |
1899 | * FIXME: if the application is not consuming the buffers, | |
1900 | * we should eventually put things on hold and restart in | |
1901 | * vidioc_dqbuf(). | |
1902 | */ | |
1903 | case S_STREAMING: | |
1904 | tasklet_schedule(&cam->s_tasklet); | |
1905 | break; | |
1906 | ||
1907 | default: | |
1908 | cam_err(cam, "Frame interrupt in non-operational state\n"); | |
1909 | break; | |
1910 | } | |
1911 | } | |
1912 | ||
1913 | ||
1914 | ||
1915 | ||
1916 | static void cafe_frame_irq(struct cafe_camera *cam, unsigned int irqs) | |
1917 | { | |
1918 | unsigned int frame; | |
1919 | ||
1920 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); /* Clear'em all */ | |
1921 | /* | |
1922 | * Handle any frame completions. There really should | |
1923 | * not be more than one of these, or we have fallen | |
1924 | * far behind. | |
1925 | */ | |
1926 | for (frame = 0; frame < cam->nbufs; frame++) | |
1927 | if (irqs & (IRQ_EOF0 << frame)) | |
1928 | cafe_frame_complete(cam, frame); | |
1929 | /* | |
1930 | * If a frame starts, note that we have DMA active. This | |
1931 | * code assumes that we won't get multiple frame interrupts | |
1932 | * at once; may want to rethink that. | |
1933 | */ | |
1934 | if (irqs & (IRQ_SOF0 | IRQ_SOF1 | IRQ_SOF2)) | |
1935 | set_bit(CF_DMA_ACTIVE, &cam->flags); | |
1936 | } | |
1937 | ||
1938 | ||
1939 | ||
1940 | static irqreturn_t cafe_irq(int irq, void *data) | |
1941 | { | |
1942 | struct cafe_camera *cam = data; | |
1943 | unsigned int irqs; | |
1944 | ||
1945 | spin_lock(&cam->dev_lock); | |
1946 | irqs = cafe_reg_read(cam, REG_IRQSTAT); | |
1947 | if ((irqs & ALLIRQS) == 0) { | |
1948 | spin_unlock(&cam->dev_lock); | |
1949 | return IRQ_NONE; | |
1950 | } | |
1951 | if (irqs & FRAMEIRQS) | |
1952 | cafe_frame_irq(cam, irqs); | |
1953 | if (irqs & TWSIIRQS) { | |
1954 | cafe_reg_write(cam, REG_IRQSTAT, TWSIIRQS); | |
1955 | wake_up(&cam->smbus_wait); | |
1956 | } | |
1957 | spin_unlock(&cam->dev_lock); | |
1958 | return IRQ_HANDLED; | |
1959 | } | |
1960 | ||
1961 | ||
1962 | /* -------------------------------------------------------------------------- */ | |
1963 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1964 | /* | |
1965 | * Debugfs stuff. | |
1966 | */ | |
1967 | ||
1968 | static char cafe_debug_buf[1024]; | |
1969 | static struct dentry *cafe_dfs_root; | |
1970 | ||
1971 | static void cafe_dfs_setup(void) | |
1972 | { | |
1973 | cafe_dfs_root = debugfs_create_dir("cafe_ccic", NULL); | |
1974 | if (IS_ERR(cafe_dfs_root)) { | |
1975 | cafe_dfs_root = NULL; /* Never mind */ | |
1976 | printk(KERN_NOTICE "cafe_ccic unable to set up debugfs\n"); | |
1977 | } | |
1978 | } | |
1979 | ||
1980 | static void cafe_dfs_shutdown(void) | |
1981 | { | |
1982 | if (cafe_dfs_root) | |
1983 | debugfs_remove(cafe_dfs_root); | |
1984 | } | |
1985 | ||
1986 | static int cafe_dfs_open(struct inode *inode, struct file *file) | |
1987 | { | |
1988 | file->private_data = inode->i_private; | |
1989 | return 0; | |
1990 | } | |
1991 | ||
1992 | static ssize_t cafe_dfs_read_regs(struct file *file, | |
1993 | char __user *buf, size_t count, loff_t *ppos) | |
1994 | { | |
1995 | struct cafe_camera *cam = file->private_data; | |
1996 | char *s = cafe_debug_buf; | |
1997 | int offset; | |
1998 | ||
1999 | for (offset = 0; offset < 0x44; offset += 4) | |
2000 | s += sprintf(s, "%02x: %08x\n", offset, | |
2001 | cafe_reg_read(cam, offset)); | |
2002 | for (offset = 0x88; offset <= 0x90; offset += 4) | |
2003 | s += sprintf(s, "%02x: %08x\n", offset, | |
2004 | cafe_reg_read(cam, offset)); | |
2005 | for (offset = 0xb4; offset <= 0xbc; offset += 4) | |
2006 | s += sprintf(s, "%02x: %08x\n", offset, | |
2007 | cafe_reg_read(cam, offset)); | |
2008 | for (offset = 0x3000; offset <= 0x300c; offset += 4) | |
2009 | s += sprintf(s, "%04x: %08x\n", offset, | |
2010 | cafe_reg_read(cam, offset)); | |
2011 | return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf, | |
2012 | s - cafe_debug_buf); | |
2013 | } | |
2014 | ||
fa027c2a | 2015 | static const struct file_operations cafe_dfs_reg_ops = { |
d905b382 JC |
2016 | .owner = THIS_MODULE, |
2017 | .read = cafe_dfs_read_regs, | |
2018 | .open = cafe_dfs_open | |
2019 | }; | |
2020 | ||
2021 | static ssize_t cafe_dfs_read_cam(struct file *file, | |
2022 | char __user *buf, size_t count, loff_t *ppos) | |
2023 | { | |
2024 | struct cafe_camera *cam = file->private_data; | |
2025 | char *s = cafe_debug_buf; | |
2026 | int offset; | |
2027 | ||
2028 | if (! cam->sensor) | |
2029 | return -EINVAL; | |
2030 | for (offset = 0x0; offset < 0x8a; offset++) | |
2031 | { | |
2032 | u8 v; | |
2033 | ||
2034 | cafe_smbus_read_data(cam, cam->sensor->addr, offset, &v); | |
2035 | s += sprintf(s, "%02x: %02x\n", offset, v); | |
2036 | } | |
2037 | return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf, | |
2038 | s - cafe_debug_buf); | |
2039 | } | |
2040 | ||
fa027c2a | 2041 | static const struct file_operations cafe_dfs_cam_ops = { |
d905b382 JC |
2042 | .owner = THIS_MODULE, |
2043 | .read = cafe_dfs_read_cam, | |
2044 | .open = cafe_dfs_open | |
2045 | }; | |
2046 | ||
2047 | ||
2048 | ||
2049 | static void cafe_dfs_cam_setup(struct cafe_camera *cam) | |
2050 | { | |
2051 | char fname[40]; | |
2052 | ||
2053 | if (!cafe_dfs_root) | |
2054 | return; | |
2055 | sprintf(fname, "regs-%d", cam->v4ldev.minor); | |
2056 | cam->dfs_regs = debugfs_create_file(fname, 0444, cafe_dfs_root, | |
2057 | cam, &cafe_dfs_reg_ops); | |
2058 | sprintf(fname, "cam-%d", cam->v4ldev.minor); | |
2059 | cam->dfs_cam_regs = debugfs_create_file(fname, 0444, cafe_dfs_root, | |
2060 | cam, &cafe_dfs_cam_ops); | |
2061 | } | |
2062 | ||
2063 | ||
2064 | static void cafe_dfs_cam_shutdown(struct cafe_camera *cam) | |
2065 | { | |
2066 | if (! IS_ERR(cam->dfs_regs)) | |
2067 | debugfs_remove(cam->dfs_regs); | |
2068 | if (! IS_ERR(cam->dfs_cam_regs)) | |
2069 | debugfs_remove(cam->dfs_cam_regs); | |
2070 | } | |
2071 | ||
2072 | #else | |
2073 | ||
2074 | #define cafe_dfs_setup() | |
2075 | #define cafe_dfs_shutdown() | |
2076 | #define cafe_dfs_cam_setup(cam) | |
2077 | #define cafe_dfs_cam_shutdown(cam) | |
2078 | #endif /* CONFIG_VIDEO_ADV_DEBUG */ | |
2079 | ||
2080 | ||
2081 | ||
2082 | ||
2083 | /* ------------------------------------------------------------------------*/ | |
2084 | /* | |
2085 | * PCI interface stuff. | |
2086 | */ | |
2087 | ||
2088 | static int cafe_pci_probe(struct pci_dev *pdev, | |
2089 | const struct pci_device_id *id) | |
2090 | { | |
2091 | int ret; | |
2092 | u16 classword; | |
2093 | struct cafe_camera *cam; | |
2094 | /* | |
2095 | * Make sure we have a camera here - we'll get calls for | |
2096 | * the other cafe devices as well. | |
2097 | */ | |
2098 | pci_read_config_word(pdev, PCI_CLASS_DEVICE, &classword); | |
2099 | if (classword != PCI_CLASS_MULTIMEDIA_VIDEO) | |
2100 | return -ENODEV; | |
2101 | /* | |
2102 | * Start putting together one of our big camera structures. | |
2103 | */ | |
2104 | ret = -ENOMEM; | |
2105 | cam = kzalloc(sizeof(struct cafe_camera), GFP_KERNEL); | |
2106 | if (cam == NULL) | |
2107 | goto out; | |
2108 | mutex_init(&cam->s_mutex); | |
2109 | mutex_lock(&cam->s_mutex); | |
2110 | spin_lock_init(&cam->dev_lock); | |
2111 | cam->state = S_NOTREADY; | |
2112 | cafe_set_config_needed(cam, 1); | |
2113 | init_waitqueue_head(&cam->smbus_wait); | |
2114 | init_waitqueue_head(&cam->iowait); | |
2115 | cam->pdev = pdev; | |
2116 | cam->pix_format = cafe_def_pix_format; | |
2117 | INIT_LIST_HEAD(&cam->dev_list); | |
2118 | INIT_LIST_HEAD(&cam->sb_avail); | |
2119 | INIT_LIST_HEAD(&cam->sb_full); | |
2120 | tasklet_init(&cam->s_tasklet, cafe_frame_tasklet, (unsigned long) cam); | |
2121 | /* | |
2122 | * Get set up on the PCI bus. | |
2123 | */ | |
2124 | ret = pci_enable_device(pdev); | |
2125 | if (ret) | |
2126 | goto out_free; | |
2127 | pci_set_master(pdev); | |
2128 | ||
2129 | ret = -EIO; | |
2130 | cam->regs = pci_iomap(pdev, 0, 0); | |
2131 | if (! cam->regs) { | |
2132 | printk(KERN_ERR "Unable to ioremap cafe-ccic regs\n"); | |
2133 | goto out_free; | |
2134 | } | |
2135 | ret = request_irq(pdev->irq, cafe_irq, IRQF_SHARED, "cafe-ccic", cam); | |
2136 | if (ret) | |
2137 | goto out_iounmap; | |
7acf90c7 JC |
2138 | /* |
2139 | * Initialize the controller and leave it powered up. It will | |
2140 | * stay that way until the sensor driver shows up. | |
2141 | */ | |
d905b382 JC |
2142 | cafe_ctlr_init(cam); |
2143 | cafe_ctlr_power_up(cam); | |
2144 | /* | |
7acf90c7 JC |
2145 | * Set up I2C/SMBUS communications. We have to drop the mutex here |
2146 | * because the sensor could attach in this call chain, leading to | |
2147 | * unsightly deadlocks. | |
d905b382 JC |
2148 | */ |
2149 | mutex_unlock(&cam->s_mutex); /* attach can deadlock */ | |
2150 | ret = cafe_smbus_setup(cam); | |
2151 | if (ret) | |
2152 | goto out_freeirq; | |
2153 | /* | |
2154 | * Get the v4l2 setup done. | |
2155 | */ | |
2156 | mutex_lock(&cam->s_mutex); | |
2157 | cam->v4ldev = cafe_v4l_template; | |
2158 | cam->v4ldev.debug = 0; | |
2159 | // cam->v4ldev.debug = V4L2_DEBUG_IOCTL_ARG; | |
018cfd51 | 2160 | cam->v4ldev.dev = &pdev->dev; |
d905b382 JC |
2161 | ret = video_register_device(&cam->v4ldev, VFL_TYPE_GRABBER, -1); |
2162 | if (ret) | |
2163 | goto out_smbus; | |
2164 | /* | |
2165 | * If so requested, try to get our DMA buffers now. | |
2166 | */ | |
23869e23 | 2167 | if (!alloc_bufs_at_read) { |
d905b382 JC |
2168 | if (cafe_alloc_dma_bufs(cam, 1)) |
2169 | cam_warn(cam, "Unable to alloc DMA buffers at load" | |
2170 | " will try again later."); | |
2171 | } | |
2172 | ||
2173 | cafe_dfs_cam_setup(cam); | |
2174 | mutex_unlock(&cam->s_mutex); | |
2175 | cafe_add_dev(cam); | |
2176 | return 0; | |
2177 | ||
2178 | out_smbus: | |
2179 | cafe_smbus_shutdown(cam); | |
2180 | out_freeirq: | |
2181 | cafe_ctlr_power_down(cam); | |
2182 | free_irq(pdev->irq, cam); | |
2183 | out_iounmap: | |
2184 | pci_iounmap(pdev, cam->regs); | |
2185 | out_free: | |
2186 | kfree(cam); | |
2187 | out: | |
2188 | return ret; | |
2189 | } | |
2190 | ||
2191 | ||
2192 | /* | |
2193 | * Shut down an initialized device | |
2194 | */ | |
2195 | static void cafe_shutdown(struct cafe_camera *cam) | |
2196 | { | |
2197 | /* FIXME: Make sure we take care of everything here */ | |
2198 | cafe_dfs_cam_shutdown(cam); | |
2199 | if (cam->n_sbufs > 0) | |
2200 | /* What if they are still mapped? Shouldn't be, but... */ | |
2201 | cafe_free_sio_buffers(cam); | |
2202 | cafe_remove_dev(cam); | |
2203 | cafe_ctlr_stop_dma(cam); | |
2204 | cafe_ctlr_power_down(cam); | |
2205 | cafe_smbus_shutdown(cam); | |
2206 | cafe_free_dma_bufs(cam); | |
2207 | free_irq(cam->pdev->irq, cam); | |
2208 | pci_iounmap(cam->pdev, cam->regs); | |
2209 | video_unregister_device(&cam->v4ldev); | |
2210 | /* kfree(cam); done in v4l_release () */ | |
2211 | } | |
2212 | ||
2213 | ||
2214 | static void cafe_pci_remove(struct pci_dev *pdev) | |
2215 | { | |
2216 | struct cafe_camera *cam = cafe_find_by_pdev(pdev); | |
2217 | ||
2218 | if (cam == NULL) { | |
d4f60baf | 2219 | printk(KERN_WARNING "pci_remove on unknown pdev %p\n", pdev); |
d905b382 JC |
2220 | return; |
2221 | } | |
2222 | mutex_lock(&cam->s_mutex); | |
2223 | if (cam->users > 0) | |
2224 | cam_warn(cam, "Removing a device with users!\n"); | |
2225 | cafe_shutdown(cam); | |
2226 | /* No unlock - it no longer exists */ | |
2227 | } | |
2228 | ||
2229 | ||
ff68defa JC |
2230 | #ifdef CONFIG_PM |
2231 | /* | |
2232 | * Basic power management. | |
2233 | */ | |
2234 | static int cafe_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2235 | { | |
2236 | struct cafe_camera *cam = cafe_find_by_pdev(pdev); | |
2237 | int ret; | |
c3034497 | 2238 | enum cafe_state cstate; |
ff68defa JC |
2239 | |
2240 | ret = pci_save_state(pdev); | |
2241 | if (ret) | |
2242 | return ret; | |
c3034497 | 2243 | cstate = cam->state; /* HACK - stop_dma sets to idle */ |
ff68defa JC |
2244 | cafe_ctlr_stop_dma(cam); |
2245 | cafe_ctlr_power_down(cam); | |
2246 | pci_disable_device(pdev); | |
c3034497 | 2247 | cam->state = cstate; |
ff68defa JC |
2248 | return 0; |
2249 | } | |
2250 | ||
2251 | ||
2252 | static int cafe_pci_resume(struct pci_dev *pdev) | |
2253 | { | |
2254 | struct cafe_camera *cam = cafe_find_by_pdev(pdev); | |
2255 | int ret = 0; | |
2256 | ||
2257 | ret = pci_restore_state(pdev); | |
2258 | if (ret) | |
2259 | return ret; | |
12df2f54 | 2260 | ret = pci_enable_device(pdev); |
01659f2a | 2261 | |
12df2f54 TP |
2262 | if (ret) { |
2263 | cam_warn(cam, "Unable to re-enable device on resume!\n"); | |
2264 | return ret; | |
2265 | } | |
ff68defa | 2266 | cafe_ctlr_init(cam); |
01659f2a CB |
2267 | cafe_ctlr_power_down(cam); |
2268 | ||
2269 | mutex_lock(&cam->s_mutex); | |
2270 | if (cam->users > 0) { | |
2271 | cafe_ctlr_power_up(cam); | |
2272 | __cafe_cam_reset(cam); | |
2273 | } | |
2274 | mutex_unlock(&cam->s_mutex); | |
2275 | ||
ff68defa JC |
2276 | set_bit(CF_CONFIG_NEEDED, &cam->flags); |
2277 | if (cam->state == S_SPECREAD) | |
2278 | cam->state = S_IDLE; /* Don't bother restarting */ | |
2279 | else if (cam->state == S_SINGLEREAD || cam->state == S_STREAMING) | |
2280 | ret = cafe_read_setup(cam, cam->state); | |
2281 | return ret; | |
2282 | } | |
2283 | ||
2284 | #endif /* CONFIG_PM */ | |
d905b382 JC |
2285 | |
2286 | ||
2287 | static struct pci_device_id cafe_ids[] = { | |
d905b382 JC |
2288 | { PCI_DEVICE(0x11ab, 0x4100) }, /* Eventual real ID */ |
2289 | { PCI_DEVICE(0x11ab, 0x4102) }, /* Really eventual real ID */ | |
2290 | { 0, } | |
2291 | }; | |
2292 | ||
2293 | MODULE_DEVICE_TABLE(pci, cafe_ids); | |
2294 | ||
2295 | static struct pci_driver cafe_pci_driver = { | |
2296 | .name = "cafe1000-ccic", | |
2297 | .id_table = cafe_ids, | |
2298 | .probe = cafe_pci_probe, | |
2299 | .remove = cafe_pci_remove, | |
ff68defa JC |
2300 | #ifdef CONFIG_PM |
2301 | .suspend = cafe_pci_suspend, | |
2302 | .resume = cafe_pci_resume, | |
2303 | #endif | |
d905b382 JC |
2304 | }; |
2305 | ||
2306 | ||
2307 | ||
2308 | ||
2309 | static int __init cafe_init(void) | |
2310 | { | |
2311 | int ret; | |
2312 | ||
2313 | printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n", | |
2314 | CAFE_VERSION); | |
2315 | cafe_dfs_setup(); | |
2316 | ret = pci_register_driver(&cafe_pci_driver); | |
2317 | if (ret) { | |
2318 | printk(KERN_ERR "Unable to register cafe_ccic driver\n"); | |
2319 | goto out; | |
2320 | } | |
2321 | request_module("ov7670"); /* FIXME want something more general */ | |
2322 | ret = 0; | |
2323 | ||
2324 | out: | |
2325 | return ret; | |
2326 | } | |
2327 | ||
2328 | ||
2329 | static void __exit cafe_exit(void) | |
2330 | { | |
2331 | pci_unregister_driver(&cafe_pci_driver); | |
2332 | cafe_dfs_shutdown(); | |
2333 | } | |
2334 | ||
2335 | module_init(cafe_init); | |
2336 | module_exit(cafe_exit); |