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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 | * | |
6 | * Copyright 2006 One Laptop Per Child Association, Inc. | |
7 | * | |
8 | * Written by Jonathan Corbet, corbet@lwn.net. | |
9 | * | |
10 | * This file may be distributed under the terms of the GNU General | |
11 | * Public License, version 2. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/fs.h> | |
19 | #include <linux/pci.h> | |
20 | #include <linux/i2c.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/videodev2.h> | |
24 | #include <media/v4l2-common.h> | |
3434eb7e | 25 | #include <media/v4l2-chip-ident.h> |
d905b382 JC |
26 | #include <linux/device.h> |
27 | #include <linux/wait.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/dma-mapping.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/debugfs.h> | |
32 | #include <linux/jiffies.h> | |
33 | #include <linux/vmalloc.h> | |
34 | ||
35 | #include <asm/uaccess.h> | |
36 | #include <asm/io.h> | |
37 | ||
38 | #include "cafe_ccic-regs.h" | |
39 | ||
40 | #define CAFE_VERSION 0x000001 | |
41 | ||
42 | ||
43 | /* | |
44 | * Parameters. | |
45 | */ | |
46 | MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>"); | |
47 | MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | MODULE_SUPPORTED_DEVICE("Video"); | |
50 | ||
51 | /* | |
52 | * Internal DMA buffer management. Since the controller cannot do S/G I/O, | |
53 | * we must have physically contiguous buffers to bring frames into. | |
54 | * These parameters control how many buffers we use, whether we | |
55 | * allocate them at load time (better chance of success, but nails down | |
56 | * memory) or when somebody tries to use the camera (riskier), and, | |
57 | * for load-time allocation, how big they should be. | |
58 | * | |
59 | * The controller can cycle through three buffers. We could use | |
60 | * more by flipping pointers around, but it probably makes little | |
61 | * sense. | |
62 | */ | |
63 | ||
64 | #define MAX_DMA_BUFS 3 | |
65 | static int alloc_bufs_at_load = 0; | |
66 | module_param(alloc_bufs_at_load, bool, 0444); | |
67 | MODULE_PARM_DESC(alloc_bufs_at_load, | |
68 | "Non-zero value causes DMA buffers to be allocated at module " | |
69 | "load time. This increases the chances of successfully getting " | |
70 | "those buffers, but at the cost of nailing down the memory from " | |
71 | "the outset."); | |
72 | ||
73 | static int n_dma_bufs = 3; | |
74 | module_param(n_dma_bufs, uint, 0644); | |
75 | MODULE_PARM_DESC(n_dma_bufs, | |
76 | "The number of DMA buffers to allocate. Can be either two " | |
77 | "(saves memory, makes timing tighter) or three."); | |
78 | ||
79 | static int dma_buf_size = VGA_WIDTH * VGA_HEIGHT * 2; /* Worst case */ | |
80 | module_param(dma_buf_size, uint, 0444); | |
81 | MODULE_PARM_DESC(dma_buf_size, | |
82 | "The size of the allocated DMA buffers. If actual operating " | |
83 | "parameters require larger buffers, an attempt to reallocate " | |
84 | "will be made."); | |
85 | ||
86 | static int min_buffers = 1; | |
87 | module_param(min_buffers, uint, 0644); | |
88 | MODULE_PARM_DESC(min_buffers, | |
89 | "The minimum number of streaming I/O buffers we are willing " | |
90 | "to work with."); | |
91 | ||
92 | static int max_buffers = 10; | |
93 | module_param(max_buffers, uint, 0644); | |
94 | MODULE_PARM_DESC(max_buffers, | |
95 | "The maximum number of streaming I/O buffers an application " | |
96 | "will be allowed to allocate. These buffers are big and live " | |
97 | "in vmalloc space."); | |
98 | ||
99 | static int flip = 0; | |
100 | module_param(flip, bool, 0444); | |
101 | MODULE_PARM_DESC(flip, | |
102 | "If set, the sensor will be instructed to flip the image " | |
103 | "vertically."); | |
104 | ||
105 | ||
106 | enum cafe_state { | |
107 | S_NOTREADY, /* Not yet initialized */ | |
108 | S_IDLE, /* Just hanging around */ | |
109 | S_FLAKED, /* Some sort of problem */ | |
110 | S_SINGLEREAD, /* In read() */ | |
111 | S_SPECREAD, /* Speculative read (for future read()) */ | |
112 | S_STREAMING /* Streaming data */ | |
113 | }; | |
114 | ||
115 | /* | |
116 | * Tracking of streaming I/O buffers. | |
117 | */ | |
118 | struct cafe_sio_buffer { | |
119 | struct list_head list; | |
120 | struct v4l2_buffer v4lbuf; | |
121 | char *buffer; /* Where it lives in kernel space */ | |
122 | int mapcount; | |
123 | struct cafe_camera *cam; | |
124 | }; | |
125 | ||
126 | /* | |
127 | * A description of one of our devices. | |
128 | * Locking: controlled by s_mutex. Certain fields, however, require | |
129 | * the dev_lock spinlock; they are marked as such by comments. | |
130 | * dev_lock is also required for access to device registers. | |
131 | */ | |
132 | struct cafe_camera | |
133 | { | |
134 | enum cafe_state state; | |
135 | unsigned long flags; /* Buffer status, mainly (dev_lock) */ | |
136 | int users; /* How many open FDs */ | |
137 | struct file *owner; /* Who has data access (v4l2) */ | |
138 | ||
139 | /* | |
140 | * Subsystem structures. | |
141 | */ | |
142 | struct pci_dev *pdev; | |
143 | struct video_device v4ldev; | |
144 | struct i2c_adapter i2c_adapter; | |
145 | struct i2c_client *sensor; | |
146 | ||
147 | unsigned char __iomem *regs; | |
148 | struct list_head dev_list; /* link to other devices */ | |
149 | ||
150 | /* DMA buffers */ | |
151 | unsigned int nbufs; /* How many are alloc'd */ | |
152 | int next_buf; /* Next to consume (dev_lock) */ | |
153 | unsigned int dma_buf_size; /* allocated size */ | |
154 | void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */ | |
155 | dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */ | |
156 | unsigned int specframes; /* Unconsumed spec frames (dev_lock) */ | |
157 | unsigned int sequence; /* Frame sequence number */ | |
158 | unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual buffers */ | |
159 | ||
160 | /* Streaming buffers */ | |
161 | unsigned int n_sbufs; /* How many we have */ | |
162 | struct cafe_sio_buffer *sb_bufs; /* The array of housekeeping structs */ | |
163 | struct list_head sb_avail; /* Available for data (we own) (dev_lock) */ | |
164 | struct list_head sb_full; /* With data (user space owns) (dev_lock) */ | |
165 | struct tasklet_struct s_tasklet; | |
166 | ||
167 | /* Current operating parameters */ | |
3434eb7e | 168 | u32 sensor_type; /* Currently ov7670 only */ |
d905b382 JC |
169 | struct v4l2_pix_format pix_format; |
170 | ||
171 | /* Locks */ | |
172 | struct mutex s_mutex; /* Access to this structure */ | |
173 | spinlock_t dev_lock; /* Access to device */ | |
174 | ||
175 | /* Misc */ | |
176 | wait_queue_head_t smbus_wait; /* Waiting on i2c events */ | |
177 | wait_queue_head_t iowait; /* Waiting on frame data */ | |
178 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
179 | struct dentry *dfs_regs; | |
180 | struct dentry *dfs_cam_regs; | |
181 | #endif | |
182 | }; | |
183 | ||
184 | /* | |
185 | * Status flags. Always manipulated with bit operations. | |
186 | */ | |
187 | #define CF_BUF0_VALID 0 /* Buffers valid - first three */ | |
188 | #define CF_BUF1_VALID 1 | |
189 | #define CF_BUF2_VALID 2 | |
190 | #define CF_DMA_ACTIVE 3 /* A frame is incoming */ | |
191 | #define CF_CONFIG_NEEDED 4 /* Must configure hardware */ | |
192 | ||
193 | ||
194 | ||
195 | /* | |
196 | * Start over with DMA buffers - dev_lock needed. | |
197 | */ | |
198 | static void cafe_reset_buffers(struct cafe_camera *cam) | |
199 | { | |
200 | int i; | |
201 | ||
202 | cam->next_buf = -1; | |
203 | for (i = 0; i < cam->nbufs; i++) | |
204 | clear_bit(i, &cam->flags); | |
205 | cam->specframes = 0; | |
206 | } | |
207 | ||
208 | static inline int cafe_needs_config(struct cafe_camera *cam) | |
209 | { | |
210 | return test_bit(CF_CONFIG_NEEDED, &cam->flags); | |
211 | } | |
212 | ||
213 | static void cafe_set_config_needed(struct cafe_camera *cam, int needed) | |
214 | { | |
215 | if (needed) | |
216 | set_bit(CF_CONFIG_NEEDED, &cam->flags); | |
217 | else | |
218 | clear_bit(CF_CONFIG_NEEDED, &cam->flags); | |
219 | } | |
220 | ||
221 | ||
222 | ||
223 | ||
224 | /* | |
225 | * Debugging and related. | |
226 | */ | |
227 | #define cam_err(cam, fmt, arg...) \ | |
228 | dev_err(&(cam)->pdev->dev, fmt, ##arg); | |
229 | #define cam_warn(cam, fmt, arg...) \ | |
230 | dev_warn(&(cam)->pdev->dev, fmt, ##arg); | |
231 | #define cam_dbg(cam, fmt, arg...) \ | |
232 | dev_dbg(&(cam)->pdev->dev, fmt, ##arg); | |
233 | ||
234 | ||
235 | /* ---------------------------------------------------------------------*/ | |
236 | /* | |
237 | * We keep a simple list of known devices to search at open time. | |
238 | */ | |
239 | static LIST_HEAD(cafe_dev_list); | |
240 | static DEFINE_MUTEX(cafe_dev_list_lock); | |
241 | ||
242 | static void cafe_add_dev(struct cafe_camera *cam) | |
243 | { | |
244 | mutex_lock(&cafe_dev_list_lock); | |
245 | list_add_tail(&cam->dev_list, &cafe_dev_list); | |
246 | mutex_unlock(&cafe_dev_list_lock); | |
247 | } | |
248 | ||
249 | static void cafe_remove_dev(struct cafe_camera *cam) | |
250 | { | |
251 | mutex_lock(&cafe_dev_list_lock); | |
252 | list_del(&cam->dev_list); | |
253 | mutex_unlock(&cafe_dev_list_lock); | |
254 | } | |
255 | ||
256 | static struct cafe_camera *cafe_find_dev(int minor) | |
257 | { | |
258 | struct cafe_camera *cam; | |
259 | ||
260 | mutex_lock(&cafe_dev_list_lock); | |
261 | list_for_each_entry(cam, &cafe_dev_list, dev_list) { | |
262 | if (cam->v4ldev.minor == minor) | |
263 | goto done; | |
264 | } | |
265 | cam = NULL; | |
266 | done: | |
267 | mutex_unlock(&cafe_dev_list_lock); | |
268 | return cam; | |
269 | } | |
270 | ||
271 | ||
272 | static struct cafe_camera *cafe_find_by_pdev(struct pci_dev *pdev) | |
273 | { | |
274 | struct cafe_camera *cam; | |
275 | ||
276 | mutex_lock(&cafe_dev_list_lock); | |
277 | list_for_each_entry(cam, &cafe_dev_list, dev_list) { | |
278 | if (cam->pdev == pdev) | |
279 | goto done; | |
280 | } | |
281 | cam = NULL; | |
282 | done: | |
283 | mutex_unlock(&cafe_dev_list_lock); | |
284 | return cam; | |
285 | } | |
286 | ||
287 | ||
288 | /* ------------------------------------------------------------------------ */ | |
289 | /* | |
290 | * Device register I/O | |
291 | */ | |
292 | static inline void cafe_reg_write(struct cafe_camera *cam, unsigned int reg, | |
293 | unsigned int val) | |
294 | { | |
295 | iowrite32(val, cam->regs + reg); | |
296 | } | |
297 | ||
298 | static inline unsigned int cafe_reg_read(struct cafe_camera *cam, | |
299 | unsigned int reg) | |
300 | { | |
301 | return ioread32(cam->regs + reg); | |
302 | } | |
303 | ||
304 | ||
305 | static inline void cafe_reg_write_mask(struct cafe_camera *cam, unsigned int reg, | |
306 | unsigned int val, unsigned int mask) | |
307 | { | |
308 | unsigned int v = cafe_reg_read(cam, reg); | |
309 | ||
310 | v = (v & ~mask) | (val & mask); | |
311 | cafe_reg_write(cam, reg, v); | |
312 | } | |
313 | ||
314 | static inline void cafe_reg_clear_bit(struct cafe_camera *cam, | |
315 | unsigned int reg, unsigned int val) | |
316 | { | |
317 | cafe_reg_write_mask(cam, reg, 0, val); | |
318 | } | |
319 | ||
320 | static inline void cafe_reg_set_bit(struct cafe_camera *cam, | |
321 | unsigned int reg, unsigned int val) | |
322 | { | |
323 | cafe_reg_write_mask(cam, reg, val, val); | |
324 | } | |
325 | ||
326 | ||
327 | ||
328 | /* -------------------------------------------------------------------- */ | |
329 | /* | |
330 | * The I2C/SMBUS interface to the camera itself starts here. The | |
331 | * controller handles SMBUS itself, presenting a relatively simple register | |
332 | * interface; all we have to do is to tell it where to route the data. | |
333 | */ | |
334 | #define CAFE_SMBUS_TIMEOUT (HZ) /* generous */ | |
335 | ||
336 | static int cafe_smbus_write_done(struct cafe_camera *cam) | |
337 | { | |
338 | unsigned long flags; | |
339 | int c1; | |
340 | ||
341 | /* | |
342 | * We must delay after the interrupt, or the controller gets confused | |
343 | * and never does give us good status. Fortunately, we don't do this | |
344 | * often. | |
345 | */ | |
346 | udelay(20); | |
347 | spin_lock_irqsave(&cam->dev_lock, flags); | |
348 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
349 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
350 | return (c1 & (TWSIC1_WSTAT|TWSIC1_ERROR)) != TWSIC1_WSTAT; | |
351 | } | |
352 | ||
353 | static int cafe_smbus_write_data(struct cafe_camera *cam, | |
354 | u16 addr, u8 command, u8 value) | |
355 | { | |
356 | unsigned int rval; | |
357 | unsigned long flags; | |
358 | ||
359 | spin_lock_irqsave(&cam->dev_lock, flags); | |
360 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
361 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
362 | /* | |
363 | * Marvell sez set clkdiv to all 1's for now. | |
364 | */ | |
365 | rval |= TWSIC0_CLKDIV; | |
366 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
367 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
368 | rval = value | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
369 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
370 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
371 | msleep(2); /* Required or things flake */ | |
372 | ||
373 | wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(cam), | |
374 | CAFE_SMBUS_TIMEOUT); | |
375 | spin_lock_irqsave(&cam->dev_lock, flags); | |
376 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
377 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
378 | ||
379 | if (rval & TWSIC1_WSTAT) { | |
380 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) timed out\n", addr, | |
381 | command, value); | |
382 | return -EIO; | |
383 | } | |
384 | if (rval & TWSIC1_ERROR) { | |
385 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) error\n", addr, | |
386 | command, value); | |
387 | return -EIO; | |
388 | } | |
389 | return 0; | |
390 | } | |
391 | ||
392 | ||
393 | ||
394 | static int cafe_smbus_read_done(struct cafe_camera *cam) | |
395 | { | |
396 | unsigned long flags; | |
397 | int c1; | |
398 | ||
399 | /* | |
400 | * We must delay after the interrupt, or the controller gets confused | |
401 | * and never does give us good status. Fortunately, we don't do this | |
402 | * often. | |
403 | */ | |
404 | udelay(20); | |
405 | spin_lock_irqsave(&cam->dev_lock, flags); | |
406 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
407 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
408 | return c1 & (TWSIC1_RVALID|TWSIC1_ERROR); | |
409 | } | |
410 | ||
411 | ||
412 | ||
413 | static int cafe_smbus_read_data(struct cafe_camera *cam, | |
414 | u16 addr, u8 command, u8 *value) | |
415 | { | |
416 | unsigned int rval; | |
417 | unsigned long flags; | |
418 | ||
419 | spin_lock_irqsave(&cam->dev_lock, flags); | |
420 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
421 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
422 | /* | |
423 | * Marvel sez set clkdiv to all 1's for now. | |
424 | */ | |
425 | rval |= TWSIC0_CLKDIV; | |
426 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
427 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
428 | rval = TWSIC1_READ | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
429 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
430 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
431 | ||
432 | wait_event_timeout(cam->smbus_wait, | |
433 | cafe_smbus_read_done(cam), CAFE_SMBUS_TIMEOUT); | |
434 | spin_lock_irqsave(&cam->dev_lock, flags); | |
435 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
436 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
437 | ||
438 | if (rval & TWSIC1_ERROR) { | |
439 | cam_err(cam, "SMBUS read (%02x/%02x) error\n", addr, command); | |
440 | return -EIO; | |
441 | } | |
442 | if (! (rval & TWSIC1_RVALID)) { | |
443 | cam_err(cam, "SMBUS read (%02x/%02x) timed out\n", addr, | |
444 | command); | |
445 | return -EIO; | |
446 | } | |
447 | *value = rval & 0xff; | |
448 | return 0; | |
449 | } | |
450 | ||
451 | /* | |
452 | * Perform a transfer over SMBUS. This thing is called under | |
453 | * the i2c bus lock, so we shouldn't race with ourselves... | |
454 | */ | |
455 | static int cafe_smbus_xfer(struct i2c_adapter *adapter, u16 addr, | |
456 | unsigned short flags, char rw, u8 command, | |
457 | int size, union i2c_smbus_data *data) | |
458 | { | |
459 | struct cafe_camera *cam = i2c_get_adapdata(adapter); | |
460 | int ret = -EINVAL; | |
461 | ||
462 | /* | |
463 | * Refuse to talk to anything but OV cam chips. We should | |
464 | * never even see an attempt to do so, but one never knows. | |
465 | */ | |
466 | if (cam->sensor && addr != cam->sensor->addr) { | |
467 | cam_err(cam, "funky smbus addr %d\n", addr); | |
468 | return -EINVAL; | |
469 | } | |
470 | /* | |
471 | * This interface would appear to only do byte data ops. OK | |
472 | * it can do word too, but the cam chip has no use for that. | |
473 | */ | |
474 | if (size != I2C_SMBUS_BYTE_DATA) { | |
475 | cam_err(cam, "funky xfer size %d\n", size); | |
476 | return -EINVAL; | |
477 | } | |
478 | ||
479 | if (rw == I2C_SMBUS_WRITE) | |
480 | ret = cafe_smbus_write_data(cam, addr, command, data->byte); | |
481 | else if (rw == I2C_SMBUS_READ) | |
482 | ret = cafe_smbus_read_data(cam, addr, command, &data->byte); | |
483 | return ret; | |
484 | } | |
485 | ||
486 | ||
487 | static void cafe_smbus_enable_irq(struct cafe_camera *cam) | |
488 | { | |
489 | unsigned long flags; | |
490 | ||
491 | spin_lock_irqsave(&cam->dev_lock, flags); | |
492 | cafe_reg_set_bit(cam, REG_IRQMASK, TWSIIRQS); | |
493 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
494 | } | |
495 | ||
496 | static u32 cafe_smbus_func(struct i2c_adapter *adapter) | |
497 | { | |
498 | return I2C_FUNC_SMBUS_READ_BYTE_DATA | | |
499 | I2C_FUNC_SMBUS_WRITE_BYTE_DATA; | |
500 | } | |
501 | ||
502 | static struct i2c_algorithm cafe_smbus_algo = { | |
503 | .smbus_xfer = cafe_smbus_xfer, | |
504 | .functionality = cafe_smbus_func | |
505 | }; | |
506 | ||
507 | /* Somebody is on the bus */ | |
508 | static int cafe_cam_init(struct cafe_camera *cam); | |
f9a76156 JC |
509 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam); |
510 | static void cafe_ctlr_power_down(struct cafe_camera *cam); | |
d905b382 JC |
511 | |
512 | static int cafe_smbus_attach(struct i2c_client *client) | |
513 | { | |
514 | struct cafe_camera *cam = i2c_get_adapdata(client->adapter); | |
515 | ||
516 | /* | |
517 | * Don't talk to chips we don't recognize. | |
518 | */ | |
d905b382 JC |
519 | if (client->driver->id == I2C_DRIVERID_OV7670) { |
520 | cam->sensor = client; | |
521 | return cafe_cam_init(cam); | |
522 | } | |
523 | return -EINVAL; | |
524 | } | |
525 | ||
526 | static int cafe_smbus_detach(struct i2c_client *client) | |
527 | { | |
528 | struct cafe_camera *cam = i2c_get_adapdata(client->adapter); | |
529 | ||
f9a76156 JC |
530 | if (cam->sensor == client) { |
531 | cafe_ctlr_stop_dma(cam); | |
532 | cafe_ctlr_power_down(cam); | |
533 | cam_err(cam, "lost the sensor!\n"); | |
d905b382 | 534 | cam->sensor = NULL; /* Bummer, no camera */ |
f9a76156 JC |
535 | cam->state = S_NOTREADY; |
536 | } | |
d905b382 JC |
537 | return 0; |
538 | } | |
539 | ||
540 | static int cafe_smbus_setup(struct cafe_camera *cam) | |
541 | { | |
542 | struct i2c_adapter *adap = &cam->i2c_adapter; | |
543 | int ret; | |
544 | ||
545 | cafe_smbus_enable_irq(cam); | |
546 | adap->id = I2C_HW_SMBUS_CAFE; | |
547 | adap->class = I2C_CLASS_CAM_DIGITAL; | |
548 | adap->owner = THIS_MODULE; | |
549 | adap->client_register = cafe_smbus_attach; | |
550 | adap->client_unregister = cafe_smbus_detach; | |
551 | adap->algo = &cafe_smbus_algo; | |
552 | strcpy(adap->name, "cafe_ccic"); | |
12a917f6 | 553 | adap->dev.parent = &cam->pdev->dev; |
d905b382 JC |
554 | i2c_set_adapdata(adap, cam); |
555 | ret = i2c_add_adapter(adap); | |
556 | if (ret) | |
557 | printk(KERN_ERR "Unable to register cafe i2c adapter\n"); | |
558 | return ret; | |
559 | } | |
560 | ||
561 | static void cafe_smbus_shutdown(struct cafe_camera *cam) | |
562 | { | |
563 | i2c_del_adapter(&cam->i2c_adapter); | |
564 | } | |
565 | ||
566 | ||
567 | /* ------------------------------------------------------------------- */ | |
568 | /* | |
569 | * Deal with the controller. | |
570 | */ | |
571 | ||
572 | /* | |
573 | * Do everything we think we need to have the interface operating | |
574 | * according to the desired format. | |
575 | */ | |
576 | static void cafe_ctlr_dma(struct cafe_camera *cam) | |
577 | { | |
578 | /* | |
579 | * Store the first two Y buffers (we aren't supporting | |
580 | * planar formats for now, so no UV bufs). Then either | |
581 | * set the third if it exists, or tell the controller | |
582 | * to just use two. | |
583 | */ | |
584 | cafe_reg_write(cam, REG_Y0BAR, cam->dma_handles[0]); | |
585 | cafe_reg_write(cam, REG_Y1BAR, cam->dma_handles[1]); | |
586 | if (cam->nbufs > 2) { | |
587 | cafe_reg_write(cam, REG_Y2BAR, cam->dma_handles[2]); | |
588 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
589 | } | |
590 | else | |
591 | cafe_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
592 | cafe_reg_write(cam, REG_UBAR, 0); /* 32 bits only for now */ | |
593 | } | |
594 | ||
595 | static void cafe_ctlr_image(struct cafe_camera *cam) | |
596 | { | |
597 | int imgsz; | |
598 | struct v4l2_pix_format *fmt = &cam->pix_format; | |
599 | ||
600 | imgsz = ((fmt->height << IMGSZ_V_SHIFT) & IMGSZ_V_MASK) | | |
601 | (fmt->bytesperline & IMGSZ_H_MASK); | |
602 | cafe_reg_write(cam, REG_IMGSIZE, imgsz); | |
603 | cafe_reg_write(cam, REG_IMGOFFSET, 0); | |
604 | /* YPITCH just drops the last two bits */ | |
605 | cafe_reg_write_mask(cam, REG_IMGPITCH, fmt->bytesperline, | |
606 | IMGP_YP_MASK); | |
607 | /* | |
608 | * Tell the controller about the image format we are using. | |
609 | */ | |
610 | switch (cam->pix_format.pixelformat) { | |
611 | case V4L2_PIX_FMT_YUYV: | |
612 | cafe_reg_write_mask(cam, REG_CTRL0, | |
613 | C0_DF_YUV|C0_YUV_PACKED|C0_YUVE_YUYV, | |
614 | C0_DF_MASK); | |
615 | break; | |
616 | ||
d905b382 JC |
617 | case V4L2_PIX_FMT_RGB444: |
618 | cafe_reg_write_mask(cam, REG_CTRL0, | |
619 | C0_DF_RGB|C0_RGBF_444|C0_RGB4_XRGB, | |
620 | C0_DF_MASK); | |
621 | /* Alpha value? */ | |
622 | break; | |
623 | ||
624 | case V4L2_PIX_FMT_RGB565: | |
625 | cafe_reg_write_mask(cam, REG_CTRL0, | |
626 | C0_DF_RGB|C0_RGBF_565|C0_RGB5_BGGR, | |
627 | C0_DF_MASK); | |
628 | break; | |
629 | ||
630 | default: | |
631 | cam_err(cam, "Unknown format %x\n", cam->pix_format.pixelformat); | |
632 | break; | |
633 | } | |
634 | /* | |
635 | * Make sure it knows we want to use hsync/vsync. | |
636 | */ | |
637 | cafe_reg_write_mask(cam, REG_CTRL0, C0_SIF_HVSYNC, | |
638 | C0_SIFM_MASK); | |
639 | } | |
640 | ||
641 | ||
642 | /* | |
643 | * Configure the controller for operation; caller holds the | |
644 | * device mutex. | |
645 | */ | |
646 | static int cafe_ctlr_configure(struct cafe_camera *cam) | |
647 | { | |
648 | unsigned long flags; | |
649 | ||
650 | spin_lock_irqsave(&cam->dev_lock, flags); | |
651 | cafe_ctlr_dma(cam); | |
652 | cafe_ctlr_image(cam); | |
653 | cafe_set_config_needed(cam, 0); | |
654 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
655 | return 0; | |
656 | } | |
657 | ||
658 | static void cafe_ctlr_irq_enable(struct cafe_camera *cam) | |
659 | { | |
660 | /* | |
661 | * Clear any pending interrupts, since we do not | |
662 | * expect to have I/O active prior to enabling. | |
663 | */ | |
664 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); | |
665 | cafe_reg_set_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
666 | } | |
667 | ||
668 | static void cafe_ctlr_irq_disable(struct cafe_camera *cam) | |
669 | { | |
670 | cafe_reg_clear_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
671 | } | |
672 | ||
673 | /* | |
674 | * Make the controller start grabbing images. Everything must | |
675 | * be set up before doing this. | |
676 | */ | |
677 | static void cafe_ctlr_start(struct cafe_camera *cam) | |
678 | { | |
679 | /* set_bit performs a read, so no other barrier should be | |
680 | needed here */ | |
681 | cafe_reg_set_bit(cam, REG_CTRL0, C0_ENABLE); | |
682 | } | |
683 | ||
684 | static void cafe_ctlr_stop(struct cafe_camera *cam) | |
685 | { | |
686 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
687 | } | |
688 | ||
689 | static void cafe_ctlr_init(struct cafe_camera *cam) | |
690 | { | |
691 | unsigned long flags; | |
692 | ||
693 | spin_lock_irqsave(&cam->dev_lock, flags); | |
694 | /* | |
695 | * Added magic to bring up the hardware on the B-Test board | |
696 | */ | |
697 | cafe_reg_write(cam, 0x3038, 0x8); | |
698 | cafe_reg_write(cam, 0x315c, 0x80008); | |
699 | /* | |
700 | * Go through the dance needed to wake the device up. | |
701 | * Note that these registers are global and shared | |
702 | * with the NAND and SD devices. Interaction between the | |
703 | * three still needs to be examined. | |
704 | */ | |
705 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRS|GCSR_MRS); /* Needed? */ | |
706 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRC); | |
707 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRS); | |
5b50ed7c JC |
708 | /* |
709 | * Here we must wait a bit for the controller to come around. | |
710 | */ | |
711 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
d905b382 | 712 | mdelay(5); /* FIXME revisit this */ |
5b50ed7c JC |
713 | spin_lock_irqsave(&cam->dev_lock, flags); |
714 | ||
d905b382 JC |
715 | cafe_reg_write(cam, REG_GL_CSR, GCSR_CCIC_EN|GCSR_SRC|GCSR_MRC); |
716 | cafe_reg_set_bit(cam, REG_GL_IMASK, GIMSK_CCIC_EN); | |
717 | /* | |
718 | * Make sure it's not powered down. | |
719 | */ | |
720 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
721 | /* | |
722 | * Turn off the enable bit. It sure should be off anyway, | |
723 | * but it's good to be sure. | |
724 | */ | |
725 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
726 | /* | |
727 | * Mask all interrupts. | |
728 | */ | |
729 | cafe_reg_write(cam, REG_IRQMASK, 0); | |
730 | /* | |
731 | * Clock the sensor appropriately. Controller clock should | |
732 | * be 48MHz, sensor "typical" value is half that. | |
733 | */ | |
734 | cafe_reg_write_mask(cam, REG_CLKCTRL, 2, CLK_DIV_MASK); | |
735 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
736 | } | |
737 | ||
738 | ||
739 | /* | |
740 | * Stop the controller, and don't return until we're really sure that no | |
741 | * further DMA is going on. | |
742 | */ | |
743 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam) | |
744 | { | |
745 | unsigned long flags; | |
746 | ||
747 | /* | |
748 | * Theory: stop the camera controller (whether it is operating | |
749 | * or not). Delay briefly just in case we race with the SOF | |
750 | * interrupt, then wait until no DMA is active. | |
751 | */ | |
752 | spin_lock_irqsave(&cam->dev_lock, flags); | |
753 | cafe_ctlr_stop(cam); | |
754 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
755 | mdelay(1); | |
756 | wait_event_timeout(cam->iowait, | |
757 | !test_bit(CF_DMA_ACTIVE, &cam->flags), HZ); | |
758 | if (test_bit(CF_DMA_ACTIVE, &cam->flags)) | |
759 | cam_err(cam, "Timeout waiting for DMA to end\n"); | |
760 | /* This would be bad news - what now? */ | |
761 | spin_lock_irqsave(&cam->dev_lock, flags); | |
762 | cam->state = S_IDLE; | |
763 | cafe_ctlr_irq_disable(cam); | |
764 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
765 | } | |
766 | ||
767 | /* | |
768 | * Power up and down. | |
769 | */ | |
770 | static void cafe_ctlr_power_up(struct cafe_camera *cam) | |
771 | { | |
772 | unsigned long flags; | |
773 | ||
774 | spin_lock_irqsave(&cam->dev_lock, flags); | |
775 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
776 | /* | |
777 | * Put the sensor into operational mode (assumes OLPC-style | |
778 | * wiring). Control 0 is reset - set to 1 to operate. | |
779 | * Control 1 is power down, set to 0 to operate. | |
780 | */ | |
f9a76156 | 781 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN); /* pwr up, reset */ |
5b50ed7c | 782 | // mdelay(1); /* Marvell says 1ms will do it */ |
d905b382 | 783 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C0); |
5b50ed7c | 784 | // mdelay(1); /* Enough? */ |
d905b382 JC |
785 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
786 | } | |
787 | ||
788 | static void cafe_ctlr_power_down(struct cafe_camera *cam) | |
789 | { | |
790 | unsigned long flags; | |
791 | ||
792 | spin_lock_irqsave(&cam->dev_lock, flags); | |
793 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C1); | |
794 | cafe_reg_set_bit(cam, REG_CTRL1, C1_PWRDWN); | |
795 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
796 | } | |
797 | ||
798 | /* -------------------------------------------------------------------- */ | |
799 | /* | |
800 | * Communications with the sensor. | |
801 | */ | |
802 | ||
803 | static int __cafe_cam_cmd(struct cafe_camera *cam, int cmd, void *arg) | |
804 | { | |
805 | struct i2c_client *sc = cam->sensor; | |
806 | int ret; | |
807 | ||
808 | if (sc == NULL || sc->driver == NULL || sc->driver->command == NULL) | |
809 | return -EINVAL; | |
810 | ret = sc->driver->command(sc, cmd, arg); | |
811 | if (ret == -EPERM) /* Unsupported command */ | |
812 | return 0; | |
813 | return ret; | |
814 | } | |
815 | ||
816 | static int __cafe_cam_reset(struct cafe_camera *cam) | |
817 | { | |
818 | int zero = 0; | |
819 | return __cafe_cam_cmd(cam, VIDIOC_INT_RESET, &zero); | |
820 | } | |
821 | ||
822 | /* | |
823 | * We have found the sensor on the i2c. Let's try to have a | |
824 | * conversation. | |
825 | */ | |
826 | static int cafe_cam_init(struct cafe_camera *cam) | |
827 | { | |
3434eb7e | 828 | struct v4l2_chip_ident chip = { V4L2_CHIP_MATCH_I2C_ADDR, 0, 0, 0 }; |
d905b382 JC |
829 | int ret; |
830 | ||
831 | mutex_lock(&cam->s_mutex); | |
832 | if (cam->state != S_NOTREADY) | |
833 | cam_warn(cam, "Cam init with device in funky state %d", | |
834 | cam->state); | |
835 | ret = __cafe_cam_reset(cam); | |
836 | if (ret) | |
837 | goto out; | |
3434eb7e HV |
838 | chip.match_chip = cam->sensor->addr; |
839 | ret = __cafe_cam_cmd(cam, VIDIOC_G_CHIP_IDENT, &chip); | |
d905b382 JC |
840 | if (ret) |
841 | goto out; | |
3434eb7e | 842 | cam->sensor_type = chip.ident; |
d905b382 JC |
843 | // if (cam->sensor->addr != OV7xx0_SID) { |
844 | if (cam->sensor_type != V4L2_IDENT_OV7670) { | |
845 | cam_err(cam, "Unsupported sensor type %d", cam->sensor->addr); | |
846 | ret = -EINVAL; | |
847 | goto out; | |
848 | } | |
849 | /* Get/set parameters? */ | |
850 | ret = 0; | |
851 | cam->state = S_IDLE; | |
852 | out: | |
853 | mutex_unlock(&cam->s_mutex); | |
854 | return ret; | |
855 | } | |
856 | ||
857 | /* | |
858 | * Configure the sensor to match the parameters we have. Caller should | |
859 | * hold s_mutex | |
860 | */ | |
861 | static int cafe_cam_set_flip(struct cafe_camera *cam) | |
862 | { | |
863 | struct v4l2_control ctrl; | |
864 | ||
865 | memset(&ctrl, 0, sizeof(ctrl)); | |
866 | ctrl.id = V4L2_CID_VFLIP; | |
867 | ctrl.value = flip; | |
868 | return __cafe_cam_cmd(cam, VIDIOC_S_CTRL, &ctrl); | |
869 | } | |
870 | ||
871 | ||
872 | static int cafe_cam_configure(struct cafe_camera *cam) | |
873 | { | |
874 | struct v4l2_format fmt; | |
875 | int ret, zero = 0; | |
876 | ||
877 | if (cam->state != S_IDLE) | |
878 | return -EINVAL; | |
879 | fmt.fmt.pix = cam->pix_format; | |
880 | ret = __cafe_cam_cmd(cam, VIDIOC_INT_INIT, &zero); | |
881 | if (ret == 0) | |
882 | ret = __cafe_cam_cmd(cam, VIDIOC_S_FMT, &fmt); | |
883 | /* | |
884 | * OV7670 does weird things if flip is set *before* format... | |
885 | */ | |
886 | ret += cafe_cam_set_flip(cam); | |
887 | return ret; | |
888 | } | |
889 | ||
890 | /* -------------------------------------------------------------------- */ | |
891 | /* | |
892 | * DMA buffer management. These functions need s_mutex held. | |
893 | */ | |
894 | ||
895 | /* FIXME: this is inefficient as hell, since dma_alloc_coherent just | |
896 | * does a get_free_pages() call, and we waste a good chunk of an orderN | |
897 | * allocation. Should try to allocate the whole set in one chunk. | |
898 | */ | |
899 | static int cafe_alloc_dma_bufs(struct cafe_camera *cam, int loadtime) | |
900 | { | |
901 | int i; | |
902 | ||
903 | cafe_set_config_needed(cam, 1); | |
904 | if (loadtime) | |
905 | cam->dma_buf_size = dma_buf_size; | |
a66d2336 | 906 | else |
d905b382 | 907 | cam->dma_buf_size = cam->pix_format.sizeimage; |
d905b382 JC |
908 | if (n_dma_bufs > 3) |
909 | n_dma_bufs = 3; | |
910 | ||
911 | cam->nbufs = 0; | |
912 | for (i = 0; i < n_dma_bufs; i++) { | |
913 | cam->dma_bufs[i] = dma_alloc_coherent(&cam->pdev->dev, | |
914 | cam->dma_buf_size, cam->dma_handles + i, | |
915 | GFP_KERNEL); | |
916 | if (cam->dma_bufs[i] == NULL) { | |
917 | cam_warn(cam, "Failed to allocate DMA buffer\n"); | |
918 | break; | |
919 | } | |
920 | /* For debug, remove eventually */ | |
921 | memset(cam->dma_bufs[i], 0xcc, cam->dma_buf_size); | |
922 | (cam->nbufs)++; | |
923 | } | |
924 | ||
925 | switch (cam->nbufs) { | |
926 | case 1: | |
927 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
928 | cam->dma_bufs[0], cam->dma_handles[0]); | |
929 | cam->nbufs = 0; | |
930 | case 0: | |
931 | cam_err(cam, "Insufficient DMA buffers, cannot operate\n"); | |
932 | return -ENOMEM; | |
933 | ||
934 | case 2: | |
935 | if (n_dma_bufs > 2) | |
936 | cam_warn(cam, "Will limp along with only 2 buffers\n"); | |
937 | break; | |
938 | } | |
939 | return 0; | |
940 | } | |
941 | ||
942 | static void cafe_free_dma_bufs(struct cafe_camera *cam) | |
943 | { | |
944 | int i; | |
945 | ||
946 | for (i = 0; i < cam->nbufs; i++) { | |
947 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
948 | cam->dma_bufs[i], cam->dma_handles[i]); | |
949 | cam->dma_bufs[i] = NULL; | |
950 | } | |
951 | cam->nbufs = 0; | |
952 | } | |
953 | ||
954 | ||
955 | ||
956 | ||
957 | ||
958 | /* ----------------------------------------------------------------------- */ | |
959 | /* | |
960 | * Here starts the V4L2 interface code. | |
961 | */ | |
962 | ||
963 | /* | |
964 | * Read an image from the device. | |
965 | */ | |
966 | static ssize_t cafe_deliver_buffer(struct cafe_camera *cam, | |
967 | char __user *buffer, size_t len, loff_t *pos) | |
968 | { | |
969 | int bufno; | |
970 | unsigned long flags; | |
971 | ||
972 | spin_lock_irqsave(&cam->dev_lock, flags); | |
973 | if (cam->next_buf < 0) { | |
974 | cam_err(cam, "deliver_buffer: No next buffer\n"); | |
975 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
976 | return -EIO; | |
977 | } | |
978 | bufno = cam->next_buf; | |
979 | clear_bit(bufno, &cam->flags); | |
980 | if (++(cam->next_buf) >= cam->nbufs) | |
981 | cam->next_buf = 0; | |
982 | if (! test_bit(cam->next_buf, &cam->flags)) | |
983 | cam->next_buf = -1; | |
984 | cam->specframes = 0; | |
985 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
986 | ||
987 | if (len > cam->pix_format.sizeimage) | |
988 | len = cam->pix_format.sizeimage; | |
989 | if (copy_to_user(buffer, cam->dma_bufs[bufno], len)) | |
990 | return -EFAULT; | |
991 | (*pos) += len; | |
992 | return len; | |
993 | } | |
994 | ||
995 | /* | |
996 | * Get everything ready, and start grabbing frames. | |
997 | */ | |
998 | static int cafe_read_setup(struct cafe_camera *cam, enum cafe_state state) | |
999 | { | |
1000 | int ret; | |
1001 | unsigned long flags; | |
1002 | ||
1003 | /* | |
1004 | * Configuration. If we still don't have DMA buffers, | |
1005 | * make one last, desperate attempt. | |
1006 | */ | |
1007 | if (cam->nbufs == 0) | |
1008 | if (cafe_alloc_dma_bufs(cam, 0)) | |
1009 | return -ENOMEM; | |
1010 | ||
1011 | if (cafe_needs_config(cam)) { | |
1012 | cafe_cam_configure(cam); | |
1013 | ret = cafe_ctlr_configure(cam); | |
1014 | if (ret) | |
1015 | return ret; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Turn it loose. | |
1020 | */ | |
1021 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1022 | cafe_reset_buffers(cam); | |
1023 | cafe_ctlr_irq_enable(cam); | |
1024 | cam->state = state; | |
1025 | cafe_ctlr_start(cam); | |
1026 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | ||
1031 | static ssize_t cafe_v4l_read(struct file *filp, | |
1032 | char __user *buffer, size_t len, loff_t *pos) | |
1033 | { | |
1034 | struct cafe_camera *cam = filp->private_data; | |
b9109b75 | 1035 | int ret = 0; |
d905b382 JC |
1036 | |
1037 | /* | |
1038 | * Perhaps we're in speculative read mode and already | |
1039 | * have data? | |
1040 | */ | |
1041 | mutex_lock(&cam->s_mutex); | |
1042 | if (cam->state == S_SPECREAD) { | |
1043 | if (cam->next_buf >= 0) { | |
1044 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
1045 | if (ret != 0) | |
1046 | goto out_unlock; | |
1047 | } | |
1048 | } else if (cam->state == S_FLAKED || cam->state == S_NOTREADY) { | |
1049 | ret = -EIO; | |
1050 | goto out_unlock; | |
1051 | } else if (cam->state != S_IDLE) { | |
1052 | ret = -EBUSY; | |
1053 | goto out_unlock; | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * v4l2: multiple processes can open the device, but only | |
1058 | * one gets to grab data from it. | |
1059 | */ | |
1060 | if (cam->owner && cam->owner != filp) { | |
1061 | ret = -EBUSY; | |
1062 | goto out_unlock; | |
1063 | } | |
1064 | cam->owner = filp; | |
1065 | ||
1066 | /* | |
1067 | * Do setup if need be. | |
1068 | */ | |
1069 | if (cam->state != S_SPECREAD) { | |
1070 | ret = cafe_read_setup(cam, S_SINGLEREAD); | |
1071 | if (ret) | |
1072 | goto out_unlock; | |
1073 | } | |
1074 | /* | |
1075 | * Wait for something to happen. This should probably | |
1076 | * be interruptible (FIXME). | |
1077 | */ | |
1078 | wait_event_timeout(cam->iowait, cam->next_buf >= 0, HZ); | |
1079 | if (cam->next_buf < 0) { | |
1080 | cam_err(cam, "read() operation timed out\n"); | |
1081 | cafe_ctlr_stop_dma(cam); | |
1082 | ret = -EIO; | |
1083 | goto out_unlock; | |
1084 | } | |
1085 | /* | |
1086 | * Give them their data and we should be done. | |
1087 | */ | |
1088 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
1089 | ||
1090 | out_unlock: | |
1091 | mutex_unlock(&cam->s_mutex); | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | ||
1096 | ||
1097 | ||
1098 | ||
1099 | ||
1100 | ||
1101 | ||
1102 | /* | |
1103 | * Streaming I/O support. | |
1104 | */ | |
1105 | ||
1106 | ||
1107 | ||
1108 | static int cafe_vidioc_streamon(struct file *filp, void *priv, | |
1109 | enum v4l2_buf_type type) | |
1110 | { | |
1111 | struct cafe_camera *cam = filp->private_data; | |
1112 | int ret = -EINVAL; | |
1113 | ||
1114 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1115 | goto out; | |
1116 | mutex_lock(&cam->s_mutex); | |
1117 | if (cam->state != S_IDLE || cam->n_sbufs == 0) | |
1118 | goto out_unlock; | |
1119 | ||
1120 | cam->sequence = 0; | |
1121 | ret = cafe_read_setup(cam, S_STREAMING); | |
1122 | ||
1123 | out_unlock: | |
1124 | mutex_unlock(&cam->s_mutex); | |
1125 | out: | |
1126 | return ret; | |
1127 | } | |
1128 | ||
1129 | ||
1130 | static int cafe_vidioc_streamoff(struct file *filp, void *priv, | |
1131 | enum v4l2_buf_type type) | |
1132 | { | |
1133 | struct cafe_camera *cam = filp->private_data; | |
1134 | int ret = -EINVAL; | |
1135 | ||
1136 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1137 | goto out; | |
1138 | mutex_lock(&cam->s_mutex); | |
1139 | if (cam->state != S_STREAMING) | |
1140 | goto out_unlock; | |
1141 | ||
1142 | cafe_ctlr_stop_dma(cam); | |
1143 | ret = 0; | |
1144 | ||
1145 | out_unlock: | |
1146 | mutex_unlock(&cam->s_mutex); | |
1147 | out: | |
1148 | return ret; | |
1149 | } | |
1150 | ||
1151 | ||
1152 | ||
1153 | static int cafe_setup_siobuf(struct cafe_camera *cam, int index) | |
1154 | { | |
1155 | struct cafe_sio_buffer *buf = cam->sb_bufs + index; | |
1156 | ||
1157 | INIT_LIST_HEAD(&buf->list); | |
1158 | buf->v4lbuf.length = PAGE_ALIGN(cam->pix_format.sizeimage); | |
1159 | buf->buffer = vmalloc_user(buf->v4lbuf.length); | |
1160 | if (buf->buffer == NULL) | |
1161 | return -ENOMEM; | |
1162 | buf->mapcount = 0; | |
1163 | buf->cam = cam; | |
1164 | ||
1165 | buf->v4lbuf.index = index; | |
1166 | buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1167 | buf->v4lbuf.field = V4L2_FIELD_NONE; | |
1168 | buf->v4lbuf.memory = V4L2_MEMORY_MMAP; | |
1169 | /* | |
1170 | * Offset: must be 32-bit even on a 64-bit system. video-buf | |
1171 | * just uses the length times the index, but the spec warns | |
1172 | * against doing just that - vma merging problems. So we | |
1173 | * leave a gap between each pair of buffers. | |
1174 | */ | |
1175 | buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length; | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | static int cafe_free_sio_buffers(struct cafe_camera *cam) | |
1180 | { | |
1181 | int i; | |
1182 | ||
1183 | /* | |
1184 | * If any buffers are mapped, we cannot free them at all. | |
1185 | */ | |
1186 | for (i = 0; i < cam->n_sbufs; i++) | |
1187 | if (cam->sb_bufs[i].mapcount > 0) | |
1188 | return -EBUSY; | |
1189 | /* | |
1190 | * OK, let's do it. | |
1191 | */ | |
1192 | for (i = 0; i < cam->n_sbufs; i++) | |
1193 | vfree(cam->sb_bufs[i].buffer); | |
1194 | cam->n_sbufs = 0; | |
1195 | kfree(cam->sb_bufs); | |
1196 | cam->sb_bufs = NULL; | |
1197 | INIT_LIST_HEAD(&cam->sb_avail); | |
1198 | INIT_LIST_HEAD(&cam->sb_full); | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | ||
1203 | ||
1204 | static int cafe_vidioc_reqbufs(struct file *filp, void *priv, | |
1205 | struct v4l2_requestbuffers *req) | |
1206 | { | |
1207 | struct cafe_camera *cam = filp->private_data; | |
3198cf67 | 1208 | int ret = 0; /* Silence warning */ |
d905b382 JC |
1209 | |
1210 | /* | |
1211 | * Make sure it's something we can do. User pointers could be | |
1212 | * implemented without great pain, but that's not been done yet. | |
1213 | */ | |
1214 | if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1215 | return -EINVAL; | |
1216 | if (req->memory != V4L2_MEMORY_MMAP) | |
1217 | return -EINVAL; | |
1218 | /* | |
1219 | * If they ask for zero buffers, they really want us to stop streaming | |
1220 | * (if it's happening) and free everything. Should we check owner? | |
1221 | */ | |
1222 | mutex_lock(&cam->s_mutex); | |
1223 | if (req->count == 0) { | |
1224 | if (cam->state == S_STREAMING) | |
1225 | cafe_ctlr_stop_dma(cam); | |
1226 | ret = cafe_free_sio_buffers (cam); | |
1227 | goto out; | |
1228 | } | |
1229 | /* | |
1230 | * Device needs to be idle and working. We *could* try to do the | |
1231 | * right thing in S_SPECREAD by shutting things down, but it | |
1232 | * probably doesn't matter. | |
1233 | */ | |
1234 | if (cam->state != S_IDLE || (cam->owner && cam->owner != filp)) { | |
1235 | ret = -EBUSY; | |
1236 | goto out; | |
1237 | } | |
1238 | cam->owner = filp; | |
1239 | ||
1240 | if (req->count < min_buffers) | |
1241 | req->count = min_buffers; | |
1242 | else if (req->count > max_buffers) | |
1243 | req->count = max_buffers; | |
1244 | if (cam->n_sbufs > 0) { | |
1245 | ret = cafe_free_sio_buffers(cam); | |
1246 | if (ret) | |
1247 | goto out; | |
1248 | } | |
1249 | ||
1250 | cam->sb_bufs = kzalloc(req->count*sizeof(struct cafe_sio_buffer), | |
1251 | GFP_KERNEL); | |
1252 | if (cam->sb_bufs == NULL) { | |
1253 | ret = -ENOMEM; | |
1254 | goto out; | |
1255 | } | |
1256 | for (cam->n_sbufs = 0; cam->n_sbufs < req->count; (cam->n_sbufs++)) { | |
1257 | ret = cafe_setup_siobuf(cam, cam->n_sbufs); | |
1258 | if (ret) | |
1259 | break; | |
1260 | } | |
1261 | ||
1262 | if (cam->n_sbufs == 0) /* no luck at all - ret already set */ | |
1263 | kfree(cam->sb_bufs); | |
d905b382 JC |
1264 | req->count = cam->n_sbufs; /* In case of partial success */ |
1265 | ||
1266 | out: | |
1267 | mutex_unlock(&cam->s_mutex); | |
1268 | return ret; | |
1269 | } | |
1270 | ||
1271 | ||
1272 | static int cafe_vidioc_querybuf(struct file *filp, void *priv, | |
1273 | struct v4l2_buffer *buf) | |
1274 | { | |
1275 | struct cafe_camera *cam = filp->private_data; | |
1276 | int ret = -EINVAL; | |
1277 | ||
1278 | mutex_lock(&cam->s_mutex); | |
1279 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1280 | goto out; | |
1281 | if (buf->index < 0 || buf->index >= cam->n_sbufs) | |
1282 | goto out; | |
1283 | *buf = cam->sb_bufs[buf->index].v4lbuf; | |
1284 | ret = 0; | |
1285 | out: | |
1286 | mutex_unlock(&cam->s_mutex); | |
1287 | return ret; | |
1288 | } | |
1289 | ||
1290 | static int cafe_vidioc_qbuf(struct file *filp, void *priv, | |
1291 | struct v4l2_buffer *buf) | |
1292 | { | |
1293 | struct cafe_camera *cam = filp->private_data; | |
1294 | struct cafe_sio_buffer *sbuf; | |
1295 | int ret = -EINVAL; | |
1296 | unsigned long flags; | |
1297 | ||
1298 | mutex_lock(&cam->s_mutex); | |
1299 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1300 | goto out; | |
1301 | if (buf->index < 0 || buf->index >= cam->n_sbufs) | |
1302 | goto out; | |
1303 | sbuf = cam->sb_bufs + buf->index; | |
1304 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) { | |
1305 | ret = 0; /* Already queued?? */ | |
1306 | goto out; | |
1307 | } | |
1308 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_DONE) { | |
1309 | /* Spec doesn't say anything, seems appropriate tho */ | |
1310 | ret = -EBUSY; | |
1311 | goto out; | |
1312 | } | |
1313 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED; | |
1314 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1315 | list_add(&sbuf->list, &cam->sb_avail); | |
1316 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1317 | ret = 0; | |
1318 | out: | |
1319 | mutex_unlock(&cam->s_mutex); | |
1320 | return ret; | |
1321 | } | |
1322 | ||
1323 | static int cafe_vidioc_dqbuf(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_unlock; | |
1334 | if (cam->state != S_STREAMING) | |
1335 | goto out_unlock; | |
1336 | if (list_empty(&cam->sb_full) && filp->f_flags & O_NONBLOCK) { | |
1337 | ret = -EAGAIN; | |
1338 | goto out_unlock; | |
1339 | } | |
1340 | ||
1341 | while (list_empty(&cam->sb_full) && cam->state == S_STREAMING) { | |
1342 | mutex_unlock(&cam->s_mutex); | |
1343 | if (wait_event_interruptible(cam->iowait, | |
1344 | !list_empty(&cam->sb_full))) { | |
1345 | ret = -ERESTARTSYS; | |
1346 | goto out; | |
1347 | } | |
1348 | mutex_lock(&cam->s_mutex); | |
1349 | } | |
1350 | ||
1351 | if (cam->state != S_STREAMING) | |
1352 | ret = -EINTR; | |
1353 | else { | |
1354 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1355 | /* Should probably recheck !list_empty() here */ | |
1356 | sbuf = list_entry(cam->sb_full.next, | |
1357 | struct cafe_sio_buffer, list); | |
1358 | list_del_init(&sbuf->list); | |
1359 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1360 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE; | |
1361 | *buf = sbuf->v4lbuf; | |
1362 | ret = 0; | |
1363 | } | |
1364 | ||
1365 | out_unlock: | |
1366 | mutex_unlock(&cam->s_mutex); | |
1367 | out: | |
1368 | return ret; | |
1369 | } | |
1370 | ||
1371 | ||
1372 | ||
1373 | static void cafe_v4l_vm_open(struct vm_area_struct *vma) | |
1374 | { | |
1375 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1376 | /* | |
1377 | * Locking: done under mmap_sem, so we don't need to | |
1378 | * go back to the camera lock here. | |
1379 | */ | |
1380 | sbuf->mapcount++; | |
1381 | } | |
1382 | ||
1383 | ||
1384 | static void cafe_v4l_vm_close(struct vm_area_struct *vma) | |
1385 | { | |
1386 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1387 | ||
1388 | mutex_lock(&sbuf->cam->s_mutex); | |
1389 | sbuf->mapcount--; | |
1390 | /* Docs say we should stop I/O too... */ | |
1391 | if (sbuf->mapcount == 0) | |
1392 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
1393 | mutex_unlock(&sbuf->cam->s_mutex); | |
1394 | } | |
1395 | ||
1396 | static struct vm_operations_struct cafe_v4l_vm_ops = { | |
1397 | .open = cafe_v4l_vm_open, | |
1398 | .close = cafe_v4l_vm_close | |
1399 | }; | |
1400 | ||
1401 | ||
1402 | static int cafe_v4l_mmap(struct file *filp, struct vm_area_struct *vma) | |
1403 | { | |
1404 | struct cafe_camera *cam = filp->private_data; | |
1405 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
1406 | int ret = -EINVAL; | |
1407 | int i; | |
1408 | struct cafe_sio_buffer *sbuf = NULL; | |
1409 | ||
1410 | if (! (vma->vm_flags & VM_WRITE) || ! (vma->vm_flags & VM_SHARED)) | |
1411 | return -EINVAL; | |
1412 | /* | |
1413 | * Find the buffer they are looking for. | |
1414 | */ | |
1415 | mutex_lock(&cam->s_mutex); | |
1416 | for (i = 0; i < cam->n_sbufs; i++) | |
1417 | if (cam->sb_bufs[i].v4lbuf.m.offset == offset) { | |
1418 | sbuf = cam->sb_bufs + i; | |
1419 | break; | |
1420 | } | |
1421 | if (sbuf == NULL) | |
1422 | goto out; | |
1423 | ||
1424 | ret = remap_vmalloc_range(vma, sbuf->buffer, 0); | |
1425 | if (ret) | |
1426 | goto out; | |
1427 | vma->vm_flags |= VM_DONTEXPAND; | |
1428 | vma->vm_private_data = sbuf; | |
1429 | vma->vm_ops = &cafe_v4l_vm_ops; | |
1430 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED; | |
1431 | cafe_v4l_vm_open(vma); | |
1432 | ret = 0; | |
1433 | out: | |
1434 | mutex_unlock(&cam->s_mutex); | |
1435 | return ret; | |
1436 | } | |
1437 | ||
1438 | ||
1439 | ||
1440 | static int cafe_v4l_open(struct inode *inode, struct file *filp) | |
1441 | { | |
1442 | struct cafe_camera *cam; | |
1443 | ||
1444 | cam = cafe_find_dev(iminor(inode)); | |
1445 | if (cam == NULL) | |
1446 | return -ENODEV; | |
1447 | filp->private_data = cam; | |
1448 | ||
1449 | mutex_lock(&cam->s_mutex); | |
1450 | if (cam->users == 0) { | |
1451 | cafe_ctlr_power_up(cam); | |
1452 | __cafe_cam_reset(cam); | |
1453 | cafe_set_config_needed(cam, 1); | |
1454 | /* FIXME make sure this is complete */ | |
1455 | } | |
1456 | (cam->users)++; | |
1457 | mutex_unlock(&cam->s_mutex); | |
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | ||
1462 | static int cafe_v4l_release(struct inode *inode, struct file *filp) | |
1463 | { | |
1464 | struct cafe_camera *cam = filp->private_data; | |
1465 | ||
1466 | mutex_lock(&cam->s_mutex); | |
1467 | (cam->users)--; | |
1468 | if (filp == cam->owner) { | |
1469 | cafe_ctlr_stop_dma(cam); | |
1470 | cafe_free_sio_buffers(cam); | |
1471 | cam->owner = NULL; | |
1472 | } | |
f9a76156 | 1473 | if (cam->users == 0) { |
d905b382 | 1474 | cafe_ctlr_power_down(cam); |
f9a76156 JC |
1475 | if (! alloc_bufs_at_load) |
1476 | cafe_free_dma_bufs(cam); | |
1477 | } | |
d905b382 JC |
1478 | mutex_unlock(&cam->s_mutex); |
1479 | return 0; | |
1480 | } | |
1481 | ||
1482 | ||
1483 | ||
1484 | static unsigned int cafe_v4l_poll(struct file *filp, | |
1485 | struct poll_table_struct *pt) | |
1486 | { | |
1487 | struct cafe_camera *cam = filp->private_data; | |
1488 | ||
1489 | poll_wait(filp, &cam->iowait, pt); | |
1490 | if (cam->next_buf >= 0) | |
1491 | return POLLIN | POLLRDNORM; | |
1492 | return 0; | |
1493 | } | |
1494 | ||
1495 | ||
1496 | ||
1497 | static int cafe_vidioc_queryctrl(struct file *filp, void *priv, | |
1498 | struct v4l2_queryctrl *qc) | |
1499 | { | |
1500 | struct cafe_camera *cam = filp->private_data; | |
1501 | int ret; | |
1502 | ||
1503 | mutex_lock(&cam->s_mutex); | |
1504 | ret = __cafe_cam_cmd(cam, VIDIOC_QUERYCTRL, qc); | |
1505 | mutex_unlock(&cam->s_mutex); | |
1506 | return ret; | |
1507 | } | |
1508 | ||
1509 | ||
1510 | static int cafe_vidioc_g_ctrl(struct file *filp, void *priv, | |
1511 | struct v4l2_control *ctrl) | |
1512 | { | |
1513 | struct cafe_camera *cam = filp->private_data; | |
1514 | int ret; | |
1515 | ||
1516 | mutex_lock(&cam->s_mutex); | |
1517 | ret = __cafe_cam_cmd(cam, VIDIOC_G_CTRL, ctrl); | |
1518 | mutex_unlock(&cam->s_mutex); | |
1519 | return ret; | |
1520 | } | |
1521 | ||
1522 | ||
1523 | static int cafe_vidioc_s_ctrl(struct file *filp, void *priv, | |
1524 | struct v4l2_control *ctrl) | |
1525 | { | |
1526 | struct cafe_camera *cam = filp->private_data; | |
1527 | int ret; | |
1528 | ||
1529 | mutex_lock(&cam->s_mutex); | |
1530 | ret = __cafe_cam_cmd(cam, VIDIOC_S_CTRL, ctrl); | |
1531 | mutex_unlock(&cam->s_mutex); | |
1532 | return ret; | |
1533 | } | |
1534 | ||
1535 | ||
1536 | ||
1537 | ||
1538 | ||
1539 | static int cafe_vidioc_querycap(struct file *file, void *priv, | |
1540 | struct v4l2_capability *cap) | |
1541 | { | |
1542 | strcpy(cap->driver, "cafe_ccic"); | |
1543 | strcpy(cap->card, "cafe_ccic"); | |
1544 | cap->version = CAFE_VERSION; | |
1545 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | | |
1546 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; | |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | ||
1551 | /* | |
1552 | * The default format we use until somebody says otherwise. | |
1553 | */ | |
1554 | static struct v4l2_pix_format cafe_def_pix_format = { | |
1555 | .width = VGA_WIDTH, | |
1556 | .height = VGA_HEIGHT, | |
1557 | .pixelformat = V4L2_PIX_FMT_YUYV, | |
1558 | .field = V4L2_FIELD_NONE, | |
1559 | .bytesperline = VGA_WIDTH*2, | |
1560 | .sizeimage = VGA_WIDTH*VGA_HEIGHT*2, | |
1561 | }; | |
1562 | ||
1563 | static int cafe_vidioc_enum_fmt_cap(struct file *filp, | |
1564 | void *priv, struct v4l2_fmtdesc *fmt) | |
1565 | { | |
1566 | struct cafe_camera *cam = priv; | |
1567 | int ret; | |
1568 | ||
1569 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1570 | return -EINVAL; | |
1571 | mutex_lock(&cam->s_mutex); | |
1572 | ret = __cafe_cam_cmd(cam, VIDIOC_ENUM_FMT, fmt); | |
1573 | mutex_unlock(&cam->s_mutex); | |
1574 | return ret; | |
1575 | } | |
1576 | ||
1577 | ||
1578 | static int cafe_vidioc_try_fmt_cap (struct file *filp, void *priv, | |
1579 | struct v4l2_format *fmt) | |
1580 | { | |
1581 | struct cafe_camera *cam = priv; | |
1582 | int ret; | |
1583 | ||
1584 | mutex_lock(&cam->s_mutex); | |
1585 | ret = __cafe_cam_cmd(cam, VIDIOC_TRY_FMT, fmt); | |
1586 | mutex_unlock(&cam->s_mutex); | |
1587 | return ret; | |
1588 | } | |
1589 | ||
1590 | static int cafe_vidioc_s_fmt_cap(struct file *filp, void *priv, | |
1591 | struct v4l2_format *fmt) | |
1592 | { | |
1593 | struct cafe_camera *cam = priv; | |
1594 | int ret; | |
1595 | ||
1596 | /* | |
1597 | * Can't do anything if the device is not idle | |
1598 | * Also can't if there are streaming buffers in place. | |
1599 | */ | |
1600 | if (cam->state != S_IDLE || cam->n_sbufs > 0) | |
1601 | return -EBUSY; | |
1602 | /* | |
1603 | * See if the formatting works in principle. | |
1604 | */ | |
1605 | ret = cafe_vidioc_try_fmt_cap(filp, priv, fmt); | |
1606 | if (ret) | |
1607 | return ret; | |
1608 | /* | |
1609 | * Now we start to change things for real, so let's do it | |
1610 | * under lock. | |
1611 | */ | |
1612 | mutex_lock(&cam->s_mutex); | |
1613 | cam->pix_format = fmt->fmt.pix; | |
1614 | /* | |
1615 | * Make sure we have appropriate DMA buffers. | |
1616 | */ | |
1617 | ret = -ENOMEM; | |
1618 | if (cam->nbufs > 0 && cam->dma_buf_size < cam->pix_format.sizeimage) | |
1619 | cafe_free_dma_bufs(cam); | |
1620 | if (cam->nbufs == 0) { | |
1621 | if (cafe_alloc_dma_bufs(cam, 0)) | |
1622 | goto out; | |
1623 | } | |
1624 | /* | |
1625 | * It looks like this might work, so let's program the sensor. | |
1626 | */ | |
1627 | ret = cafe_cam_configure(cam); | |
1628 | if (! ret) | |
1629 | ret = cafe_ctlr_configure(cam); | |
1630 | out: | |
1631 | mutex_unlock(&cam->s_mutex); | |
1632 | return ret; | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * Return our stored notion of how the camera is/should be configured. | |
1637 | * The V4l2 spec wants us to be smarter, and actually get this from | |
1638 | * the camera (and not mess with it at open time). Someday. | |
1639 | */ | |
1640 | static int cafe_vidioc_g_fmt_cap(struct file *filp, void *priv, | |
1641 | struct v4l2_format *f) | |
1642 | { | |
1643 | struct cafe_camera *cam = priv; | |
1644 | ||
1645 | f->fmt.pix = cam->pix_format; | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | /* | |
1650 | * We only have one input - the sensor - so minimize the nonsense here. | |
1651 | */ | |
1652 | static int cafe_vidioc_enum_input(struct file *filp, void *priv, | |
1653 | struct v4l2_input *input) | |
1654 | { | |
1655 | if (input->index != 0) | |
1656 | return -EINVAL; | |
1657 | ||
1658 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1659 | input->std = V4L2_STD_ALL; /* Not sure what should go here */ | |
1660 | strcpy(input->name, "Camera"); | |
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | static int cafe_vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
1665 | { | |
1666 | *i = 0; | |
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | static int cafe_vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
1671 | { | |
1672 | if (i != 0) | |
1673 | return -EINVAL; | |
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | /* from vivi.c */ | |
e75f9cee | 1678 | static int cafe_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a) |
d905b382 JC |
1679 | { |
1680 | return 0; | |
1681 | } | |
1682 | ||
c8f5b2f5 JC |
1683 | /* |
1684 | * G/S_PARM. Most of this is done by the sensor, but we are | |
1685 | * the level which controls the number of read buffers. | |
1686 | */ | |
1687 | static int cafe_vidioc_g_parm(struct file *filp, void *priv, | |
1688 | struct v4l2_streamparm *parms) | |
1689 | { | |
1690 | struct cafe_camera *cam = priv; | |
1691 | int ret; | |
1692 | ||
1693 | mutex_lock(&cam->s_mutex); | |
1694 | ret = __cafe_cam_cmd(cam, VIDIOC_G_PARM, parms); | |
1695 | mutex_unlock(&cam->s_mutex); | |
1696 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1697 | return ret; | |
1698 | } | |
1699 | ||
1700 | static int cafe_vidioc_s_parm(struct file *filp, void *priv, | |
1701 | struct v4l2_streamparm *parms) | |
1702 | { | |
1703 | struct cafe_camera *cam = priv; | |
1704 | int ret; | |
1705 | ||
1706 | mutex_lock(&cam->s_mutex); | |
1707 | ret = __cafe_cam_cmd(cam, VIDIOC_S_PARM, parms); | |
1708 | mutex_unlock(&cam->s_mutex); | |
1709 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1710 | return ret; | |
1711 | } | |
1712 | ||
1713 | ||
ab33668f | 1714 | static void cafe_v4l_dev_release(struct video_device *vd) |
d905b382 JC |
1715 | { |
1716 | struct cafe_camera *cam = container_of(vd, struct cafe_camera, v4ldev); | |
1717 | ||
1718 | kfree(cam); | |
1719 | } | |
1720 | ||
1721 | ||
1722 | /* | |
1723 | * This template device holds all of those v4l2 methods; we | |
1724 | * clone it for specific real devices. | |
1725 | */ | |
1726 | ||
fa027c2a | 1727 | static const struct file_operations cafe_v4l_fops = { |
d905b382 JC |
1728 | .owner = THIS_MODULE, |
1729 | .open = cafe_v4l_open, | |
1730 | .release = cafe_v4l_release, | |
1731 | .read = cafe_v4l_read, | |
1732 | .poll = cafe_v4l_poll, | |
1733 | .mmap = cafe_v4l_mmap, | |
1734 | .ioctl = video_ioctl2, | |
1735 | .llseek = no_llseek, | |
1736 | }; | |
1737 | ||
1738 | static struct video_device cafe_v4l_template = { | |
1739 | .name = "cafe", | |
1740 | .type = VFL_TYPE_GRABBER, | |
1741 | .type2 = VID_TYPE_CAPTURE, | |
1742 | .minor = -1, /* Get one dynamically */ | |
e75f9cee | 1743 | .tvnorms = V4L2_STD_NTSC_M, |
d905b382 JC |
1744 | .current_norm = V4L2_STD_NTSC_M, /* make mplayer happy */ |
1745 | ||
1746 | .fops = &cafe_v4l_fops, | |
1747 | .release = cafe_v4l_dev_release, | |
1748 | ||
1749 | .vidioc_querycap = cafe_vidioc_querycap, | |
1750 | .vidioc_enum_fmt_cap = cafe_vidioc_enum_fmt_cap, | |
1751 | .vidioc_try_fmt_cap = cafe_vidioc_try_fmt_cap, | |
1752 | .vidioc_s_fmt_cap = cafe_vidioc_s_fmt_cap, | |
1753 | .vidioc_g_fmt_cap = cafe_vidioc_g_fmt_cap, | |
1754 | .vidioc_enum_input = cafe_vidioc_enum_input, | |
1755 | .vidioc_g_input = cafe_vidioc_g_input, | |
1756 | .vidioc_s_input = cafe_vidioc_s_input, | |
1757 | .vidioc_s_std = cafe_vidioc_s_std, | |
1758 | .vidioc_reqbufs = cafe_vidioc_reqbufs, | |
1759 | .vidioc_querybuf = cafe_vidioc_querybuf, | |
1760 | .vidioc_qbuf = cafe_vidioc_qbuf, | |
1761 | .vidioc_dqbuf = cafe_vidioc_dqbuf, | |
1762 | .vidioc_streamon = cafe_vidioc_streamon, | |
1763 | .vidioc_streamoff = cafe_vidioc_streamoff, | |
1764 | .vidioc_queryctrl = cafe_vidioc_queryctrl, | |
1765 | .vidioc_g_ctrl = cafe_vidioc_g_ctrl, | |
1766 | .vidioc_s_ctrl = cafe_vidioc_s_ctrl, | |
c8f5b2f5 JC |
1767 | .vidioc_g_parm = cafe_vidioc_g_parm, |
1768 | .vidioc_s_parm = cafe_vidioc_s_parm, | |
d905b382 JC |
1769 | }; |
1770 | ||
1771 | ||
1772 | ||
1773 | ||
1774 | ||
1775 | ||
1776 | ||
1777 | /* ---------------------------------------------------------------------- */ | |
1778 | /* | |
1779 | * Interrupt handler stuff | |
1780 | */ | |
1781 | ||
d905b382 JC |
1782 | |
1783 | ||
1784 | static void cafe_frame_tasklet(unsigned long data) | |
1785 | { | |
1786 | struct cafe_camera *cam = (struct cafe_camera *) data; | |
1787 | int i; | |
1788 | unsigned long flags; | |
1789 | struct cafe_sio_buffer *sbuf; | |
1790 | ||
1791 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1792 | for (i = 0; i < cam->nbufs; i++) { | |
1793 | int bufno = cam->next_buf; | |
1794 | if (bufno < 0) { /* "will never happen" */ | |
1795 | cam_err(cam, "No valid bufs in tasklet!\n"); | |
1796 | break; | |
1797 | } | |
1798 | if (++(cam->next_buf) >= cam->nbufs) | |
1799 | cam->next_buf = 0; | |
1800 | if (! test_bit(bufno, &cam->flags)) | |
1801 | continue; | |
1802 | if (list_empty(&cam->sb_avail)) | |
1803 | break; /* Leave it valid, hope for better later */ | |
1804 | clear_bit(bufno, &cam->flags); | |
d905b382 JC |
1805 | sbuf = list_entry(cam->sb_avail.next, |
1806 | struct cafe_sio_buffer, list); | |
5b50ed7c JC |
1807 | /* |
1808 | * Drop the lock during the big copy. This *should* be safe... | |
1809 | */ | |
1810 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
a66d2336 JC |
1811 | memcpy(sbuf->buffer, cam->dma_bufs[bufno], |
1812 | cam->pix_format.sizeimage); | |
d905b382 JC |
1813 | sbuf->v4lbuf.bytesused = cam->pix_format.sizeimage; |
1814 | sbuf->v4lbuf.sequence = cam->buf_seq[bufno]; | |
1815 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
1816 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE; | |
5b50ed7c | 1817 | spin_lock_irqsave(&cam->dev_lock, flags); |
d905b382 JC |
1818 | list_move_tail(&sbuf->list, &cam->sb_full); |
1819 | } | |
1820 | if (! list_empty(&cam->sb_full)) | |
1821 | wake_up(&cam->iowait); | |
1822 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1823 | } | |
1824 | ||
1825 | ||
1826 | ||
1827 | static void cafe_frame_complete(struct cafe_camera *cam, int frame) | |
1828 | { | |
1829 | /* | |
1830 | * Basic frame housekeeping. | |
1831 | */ | |
1832 | if (test_bit(frame, &cam->flags) && printk_ratelimit()) | |
1833 | cam_err(cam, "Frame overrun on %d, frames lost\n", frame); | |
1834 | set_bit(frame, &cam->flags); | |
1835 | clear_bit(CF_DMA_ACTIVE, &cam->flags); | |
1836 | if (cam->next_buf < 0) | |
1837 | cam->next_buf = frame; | |
1838 | cam->buf_seq[frame] = ++(cam->sequence); | |
1839 | ||
1840 | switch (cam->state) { | |
1841 | /* | |
1842 | * If in single read mode, try going speculative. | |
1843 | */ | |
1844 | case S_SINGLEREAD: | |
1845 | cam->state = S_SPECREAD; | |
1846 | cam->specframes = 0; | |
1847 | wake_up(&cam->iowait); | |
1848 | break; | |
1849 | ||
1850 | /* | |
1851 | * If we are already doing speculative reads, and nobody is | |
1852 | * reading them, just stop. | |
1853 | */ | |
1854 | case S_SPECREAD: | |
1855 | if (++(cam->specframes) >= cam->nbufs) { | |
1856 | cafe_ctlr_stop(cam); | |
1857 | cafe_ctlr_irq_disable(cam); | |
1858 | cam->state = S_IDLE; | |
1859 | } | |
1860 | wake_up(&cam->iowait); | |
1861 | break; | |
1862 | /* | |
1863 | * For the streaming case, we defer the real work to the | |
1864 | * camera tasklet. | |
1865 | * | |
1866 | * FIXME: if the application is not consuming the buffers, | |
1867 | * we should eventually put things on hold and restart in | |
1868 | * vidioc_dqbuf(). | |
1869 | */ | |
1870 | case S_STREAMING: | |
1871 | tasklet_schedule(&cam->s_tasklet); | |
1872 | break; | |
1873 | ||
1874 | default: | |
1875 | cam_err(cam, "Frame interrupt in non-operational state\n"); | |
1876 | break; | |
1877 | } | |
1878 | } | |
1879 | ||
1880 | ||
1881 | ||
1882 | ||
1883 | static void cafe_frame_irq(struct cafe_camera *cam, unsigned int irqs) | |
1884 | { | |
1885 | unsigned int frame; | |
1886 | ||
1887 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); /* Clear'em all */ | |
1888 | /* | |
1889 | * Handle any frame completions. There really should | |
1890 | * not be more than one of these, or we have fallen | |
1891 | * far behind. | |
1892 | */ | |
1893 | for (frame = 0; frame < cam->nbufs; frame++) | |
1894 | if (irqs & (IRQ_EOF0 << frame)) | |
1895 | cafe_frame_complete(cam, frame); | |
1896 | /* | |
1897 | * If a frame starts, note that we have DMA active. This | |
1898 | * code assumes that we won't get multiple frame interrupts | |
1899 | * at once; may want to rethink that. | |
1900 | */ | |
1901 | if (irqs & (IRQ_SOF0 | IRQ_SOF1 | IRQ_SOF2)) | |
1902 | set_bit(CF_DMA_ACTIVE, &cam->flags); | |
1903 | } | |
1904 | ||
1905 | ||
1906 | ||
1907 | static irqreturn_t cafe_irq(int irq, void *data) | |
1908 | { | |
1909 | struct cafe_camera *cam = data; | |
1910 | unsigned int irqs; | |
1911 | ||
1912 | spin_lock(&cam->dev_lock); | |
1913 | irqs = cafe_reg_read(cam, REG_IRQSTAT); | |
1914 | if ((irqs & ALLIRQS) == 0) { | |
1915 | spin_unlock(&cam->dev_lock); | |
1916 | return IRQ_NONE; | |
1917 | } | |
1918 | if (irqs & FRAMEIRQS) | |
1919 | cafe_frame_irq(cam, irqs); | |
1920 | if (irqs & TWSIIRQS) { | |
1921 | cafe_reg_write(cam, REG_IRQSTAT, TWSIIRQS); | |
1922 | wake_up(&cam->smbus_wait); | |
1923 | } | |
1924 | spin_unlock(&cam->dev_lock); | |
1925 | return IRQ_HANDLED; | |
1926 | } | |
1927 | ||
1928 | ||
1929 | /* -------------------------------------------------------------------------- */ | |
1930 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1931 | /* | |
1932 | * Debugfs stuff. | |
1933 | */ | |
1934 | ||
1935 | static char cafe_debug_buf[1024]; | |
1936 | static struct dentry *cafe_dfs_root; | |
1937 | ||
1938 | static void cafe_dfs_setup(void) | |
1939 | { | |
1940 | cafe_dfs_root = debugfs_create_dir("cafe_ccic", NULL); | |
1941 | if (IS_ERR(cafe_dfs_root)) { | |
1942 | cafe_dfs_root = NULL; /* Never mind */ | |
1943 | printk(KERN_NOTICE "cafe_ccic unable to set up debugfs\n"); | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | static void cafe_dfs_shutdown(void) | |
1948 | { | |
1949 | if (cafe_dfs_root) | |
1950 | debugfs_remove(cafe_dfs_root); | |
1951 | } | |
1952 | ||
1953 | static int cafe_dfs_open(struct inode *inode, struct file *file) | |
1954 | { | |
1955 | file->private_data = inode->i_private; | |
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | static ssize_t cafe_dfs_read_regs(struct file *file, | |
1960 | char __user *buf, size_t count, loff_t *ppos) | |
1961 | { | |
1962 | struct cafe_camera *cam = file->private_data; | |
1963 | char *s = cafe_debug_buf; | |
1964 | int offset; | |
1965 | ||
1966 | for (offset = 0; offset < 0x44; offset += 4) | |
1967 | s += sprintf(s, "%02x: %08x\n", offset, | |
1968 | cafe_reg_read(cam, offset)); | |
1969 | for (offset = 0x88; offset <= 0x90; offset += 4) | |
1970 | s += sprintf(s, "%02x: %08x\n", offset, | |
1971 | cafe_reg_read(cam, offset)); | |
1972 | for (offset = 0xb4; offset <= 0xbc; offset += 4) | |
1973 | s += sprintf(s, "%02x: %08x\n", offset, | |
1974 | cafe_reg_read(cam, offset)); | |
1975 | for (offset = 0x3000; offset <= 0x300c; offset += 4) | |
1976 | s += sprintf(s, "%04x: %08x\n", offset, | |
1977 | cafe_reg_read(cam, offset)); | |
1978 | return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf, | |
1979 | s - cafe_debug_buf); | |
1980 | } | |
1981 | ||
fa027c2a | 1982 | static const struct file_operations cafe_dfs_reg_ops = { |
d905b382 JC |
1983 | .owner = THIS_MODULE, |
1984 | .read = cafe_dfs_read_regs, | |
1985 | .open = cafe_dfs_open | |
1986 | }; | |
1987 | ||
1988 | static ssize_t cafe_dfs_read_cam(struct file *file, | |
1989 | char __user *buf, size_t count, loff_t *ppos) | |
1990 | { | |
1991 | struct cafe_camera *cam = file->private_data; | |
1992 | char *s = cafe_debug_buf; | |
1993 | int offset; | |
1994 | ||
1995 | if (! cam->sensor) | |
1996 | return -EINVAL; | |
1997 | for (offset = 0x0; offset < 0x8a; offset++) | |
1998 | { | |
1999 | u8 v; | |
2000 | ||
2001 | cafe_smbus_read_data(cam, cam->sensor->addr, offset, &v); | |
2002 | s += sprintf(s, "%02x: %02x\n", offset, v); | |
2003 | } | |
2004 | return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf, | |
2005 | s - cafe_debug_buf); | |
2006 | } | |
2007 | ||
fa027c2a | 2008 | static const struct file_operations cafe_dfs_cam_ops = { |
d905b382 JC |
2009 | .owner = THIS_MODULE, |
2010 | .read = cafe_dfs_read_cam, | |
2011 | .open = cafe_dfs_open | |
2012 | }; | |
2013 | ||
2014 | ||
2015 | ||
2016 | static void cafe_dfs_cam_setup(struct cafe_camera *cam) | |
2017 | { | |
2018 | char fname[40]; | |
2019 | ||
2020 | if (!cafe_dfs_root) | |
2021 | return; | |
2022 | sprintf(fname, "regs-%d", cam->v4ldev.minor); | |
2023 | cam->dfs_regs = debugfs_create_file(fname, 0444, cafe_dfs_root, | |
2024 | cam, &cafe_dfs_reg_ops); | |
2025 | sprintf(fname, "cam-%d", cam->v4ldev.minor); | |
2026 | cam->dfs_cam_regs = debugfs_create_file(fname, 0444, cafe_dfs_root, | |
2027 | cam, &cafe_dfs_cam_ops); | |
2028 | } | |
2029 | ||
2030 | ||
2031 | static void cafe_dfs_cam_shutdown(struct cafe_camera *cam) | |
2032 | { | |
2033 | if (! IS_ERR(cam->dfs_regs)) | |
2034 | debugfs_remove(cam->dfs_regs); | |
2035 | if (! IS_ERR(cam->dfs_cam_regs)) | |
2036 | debugfs_remove(cam->dfs_cam_regs); | |
2037 | } | |
2038 | ||
2039 | #else | |
2040 | ||
2041 | #define cafe_dfs_setup() | |
2042 | #define cafe_dfs_shutdown() | |
2043 | #define cafe_dfs_cam_setup(cam) | |
2044 | #define cafe_dfs_cam_shutdown(cam) | |
2045 | #endif /* CONFIG_VIDEO_ADV_DEBUG */ | |
2046 | ||
2047 | ||
2048 | ||
2049 | ||
2050 | /* ------------------------------------------------------------------------*/ | |
2051 | /* | |
2052 | * PCI interface stuff. | |
2053 | */ | |
2054 | ||
2055 | static int cafe_pci_probe(struct pci_dev *pdev, | |
2056 | const struct pci_device_id *id) | |
2057 | { | |
2058 | int ret; | |
2059 | u16 classword; | |
2060 | struct cafe_camera *cam; | |
2061 | /* | |
2062 | * Make sure we have a camera here - we'll get calls for | |
2063 | * the other cafe devices as well. | |
2064 | */ | |
2065 | pci_read_config_word(pdev, PCI_CLASS_DEVICE, &classword); | |
2066 | if (classword != PCI_CLASS_MULTIMEDIA_VIDEO) | |
2067 | return -ENODEV; | |
2068 | /* | |
2069 | * Start putting together one of our big camera structures. | |
2070 | */ | |
2071 | ret = -ENOMEM; | |
2072 | cam = kzalloc(sizeof(struct cafe_camera), GFP_KERNEL); | |
2073 | if (cam == NULL) | |
2074 | goto out; | |
2075 | mutex_init(&cam->s_mutex); | |
2076 | mutex_lock(&cam->s_mutex); | |
2077 | spin_lock_init(&cam->dev_lock); | |
2078 | cam->state = S_NOTREADY; | |
2079 | cafe_set_config_needed(cam, 1); | |
2080 | init_waitqueue_head(&cam->smbus_wait); | |
2081 | init_waitqueue_head(&cam->iowait); | |
2082 | cam->pdev = pdev; | |
2083 | cam->pix_format = cafe_def_pix_format; | |
2084 | INIT_LIST_HEAD(&cam->dev_list); | |
2085 | INIT_LIST_HEAD(&cam->sb_avail); | |
2086 | INIT_LIST_HEAD(&cam->sb_full); | |
2087 | tasklet_init(&cam->s_tasklet, cafe_frame_tasklet, (unsigned long) cam); | |
2088 | /* | |
2089 | * Get set up on the PCI bus. | |
2090 | */ | |
2091 | ret = pci_enable_device(pdev); | |
2092 | if (ret) | |
2093 | goto out_free; | |
2094 | pci_set_master(pdev); | |
2095 | ||
2096 | ret = -EIO; | |
2097 | cam->regs = pci_iomap(pdev, 0, 0); | |
2098 | if (! cam->regs) { | |
2099 | printk(KERN_ERR "Unable to ioremap cafe-ccic regs\n"); | |
2100 | goto out_free; | |
2101 | } | |
2102 | ret = request_irq(pdev->irq, cafe_irq, IRQF_SHARED, "cafe-ccic", cam); | |
2103 | if (ret) | |
2104 | goto out_iounmap; | |
2105 | cafe_ctlr_init(cam); | |
2106 | cafe_ctlr_power_up(cam); | |
2107 | /* | |
2108 | * Set up I2C/SMBUS communications | |
2109 | */ | |
2110 | mutex_unlock(&cam->s_mutex); /* attach can deadlock */ | |
2111 | ret = cafe_smbus_setup(cam); | |
2112 | if (ret) | |
2113 | goto out_freeirq; | |
2114 | /* | |
2115 | * Get the v4l2 setup done. | |
2116 | */ | |
2117 | mutex_lock(&cam->s_mutex); | |
2118 | cam->v4ldev = cafe_v4l_template; | |
2119 | cam->v4ldev.debug = 0; | |
2120 | // cam->v4ldev.debug = V4L2_DEBUG_IOCTL_ARG; | |
018cfd51 | 2121 | cam->v4ldev.dev = &pdev->dev; |
d905b382 JC |
2122 | ret = video_register_device(&cam->v4ldev, VFL_TYPE_GRABBER, -1); |
2123 | if (ret) | |
2124 | goto out_smbus; | |
2125 | /* | |
2126 | * If so requested, try to get our DMA buffers now. | |
2127 | */ | |
2128 | if (alloc_bufs_at_load) { | |
2129 | if (cafe_alloc_dma_bufs(cam, 1)) | |
2130 | cam_warn(cam, "Unable to alloc DMA buffers at load" | |
2131 | " will try again later."); | |
2132 | } | |
2133 | ||
2134 | cafe_dfs_cam_setup(cam); | |
2135 | mutex_unlock(&cam->s_mutex); | |
2136 | cafe_add_dev(cam); | |
2137 | return 0; | |
2138 | ||
2139 | out_smbus: | |
2140 | cafe_smbus_shutdown(cam); | |
2141 | out_freeirq: | |
2142 | cafe_ctlr_power_down(cam); | |
2143 | free_irq(pdev->irq, cam); | |
2144 | out_iounmap: | |
2145 | pci_iounmap(pdev, cam->regs); | |
2146 | out_free: | |
2147 | kfree(cam); | |
2148 | out: | |
2149 | return ret; | |
2150 | } | |
2151 | ||
2152 | ||
2153 | /* | |
2154 | * Shut down an initialized device | |
2155 | */ | |
2156 | static void cafe_shutdown(struct cafe_camera *cam) | |
2157 | { | |
2158 | /* FIXME: Make sure we take care of everything here */ | |
2159 | cafe_dfs_cam_shutdown(cam); | |
2160 | if (cam->n_sbufs > 0) | |
2161 | /* What if they are still mapped? Shouldn't be, but... */ | |
2162 | cafe_free_sio_buffers(cam); | |
2163 | cafe_remove_dev(cam); | |
2164 | cafe_ctlr_stop_dma(cam); | |
2165 | cafe_ctlr_power_down(cam); | |
2166 | cafe_smbus_shutdown(cam); | |
2167 | cafe_free_dma_bufs(cam); | |
2168 | free_irq(cam->pdev->irq, cam); | |
2169 | pci_iounmap(cam->pdev, cam->regs); | |
2170 | video_unregister_device(&cam->v4ldev); | |
2171 | /* kfree(cam); done in v4l_release () */ | |
2172 | } | |
2173 | ||
2174 | ||
2175 | static void cafe_pci_remove(struct pci_dev *pdev) | |
2176 | { | |
2177 | struct cafe_camera *cam = cafe_find_by_pdev(pdev); | |
2178 | ||
2179 | if (cam == NULL) { | |
d4f60baf | 2180 | printk(KERN_WARNING "pci_remove on unknown pdev %p\n", pdev); |
d905b382 JC |
2181 | return; |
2182 | } | |
2183 | mutex_lock(&cam->s_mutex); | |
2184 | if (cam->users > 0) | |
2185 | cam_warn(cam, "Removing a device with users!\n"); | |
2186 | cafe_shutdown(cam); | |
2187 | /* No unlock - it no longer exists */ | |
2188 | } | |
2189 | ||
2190 | ||
2191 | ||
2192 | ||
2193 | static struct pci_device_id cafe_ids[] = { | |
d905b382 JC |
2194 | { PCI_DEVICE(0x11ab, 0x4100) }, /* Eventual real ID */ |
2195 | { PCI_DEVICE(0x11ab, 0x4102) }, /* Really eventual real ID */ | |
2196 | { 0, } | |
2197 | }; | |
2198 | ||
2199 | MODULE_DEVICE_TABLE(pci, cafe_ids); | |
2200 | ||
2201 | static struct pci_driver cafe_pci_driver = { | |
2202 | .name = "cafe1000-ccic", | |
2203 | .id_table = cafe_ids, | |
2204 | .probe = cafe_pci_probe, | |
2205 | .remove = cafe_pci_remove, | |
2206 | }; | |
2207 | ||
2208 | ||
2209 | ||
2210 | ||
2211 | static int __init cafe_init(void) | |
2212 | { | |
2213 | int ret; | |
2214 | ||
2215 | printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n", | |
2216 | CAFE_VERSION); | |
2217 | cafe_dfs_setup(); | |
2218 | ret = pci_register_driver(&cafe_pci_driver); | |
2219 | if (ret) { | |
2220 | printk(KERN_ERR "Unable to register cafe_ccic driver\n"); | |
2221 | goto out; | |
2222 | } | |
2223 | request_module("ov7670"); /* FIXME want something more general */ | |
2224 | ret = 0; | |
2225 | ||
2226 | out: | |
2227 | return ret; | |
2228 | } | |
2229 | ||
2230 | ||
2231 | static void __exit cafe_exit(void) | |
2232 | { | |
2233 | pci_unregister_driver(&cafe_pci_driver); | |
2234 | cafe_dfs_shutdown(); | |
2235 | } | |
2236 | ||
2237 | module_init(cafe_init); | |
2238 | module_exit(cafe_exit); |