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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> | |
ec16d020 | 22 | #include <linux/mm.h> |
d905b382 JC |
23 | #include <linux/pci.h> |
24 | #include <linux/i2c.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/videodev2.h> | |
21508b90 | 28 | #include <media/v4l2-device.h> |
35ea11ff | 29 | #include <media/v4l2-ioctl.h> |
3434eb7e | 30 | #include <media/v4l2-chip-ident.h> |
d905b382 JC |
31 | #include <linux/device.h> |
32 | #include <linux/wait.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/dma-mapping.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/debugfs.h> | |
37 | #include <linux/jiffies.h> | |
38 | #include <linux/vmalloc.h> | |
39 | ||
40 | #include <asm/uaccess.h> | |
41 | #include <asm/io.h> | |
42 | ||
43 | #include "cafe_ccic-regs.h" | |
44 | ||
ff68defa | 45 | #define CAFE_VERSION 0x000002 |
d905b382 JC |
46 | |
47 | ||
48 | /* | |
49 | * Parameters. | |
50 | */ | |
51 | MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>"); | |
52 | MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver"); | |
53 | MODULE_LICENSE("GPL"); | |
54 | MODULE_SUPPORTED_DEVICE("Video"); | |
55 | ||
56 | /* | |
57 | * Internal DMA buffer management. Since the controller cannot do S/G I/O, | |
58 | * we must have physically contiguous buffers to bring frames into. | |
59 | * These parameters control how many buffers we use, whether we | |
60 | * allocate them at load time (better chance of success, but nails down | |
61 | * memory) or when somebody tries to use the camera (riskier), and, | |
62 | * for load-time allocation, how big they should be. | |
63 | * | |
64 | * The controller can cycle through three buffers. We could use | |
65 | * more by flipping pointers around, but it probably makes little | |
66 | * sense. | |
67 | */ | |
68 | ||
69 | #define MAX_DMA_BUFS 3 | |
ff699e6b | 70 | static int alloc_bufs_at_read; |
23869e23 AS |
71 | module_param(alloc_bufs_at_read, bool, 0444); |
72 | MODULE_PARM_DESC(alloc_bufs_at_read, | |
73 | "Non-zero value causes DMA buffers to be allocated when the " | |
74 | "video capture device is read, rather than at module load " | |
75 | "time. This saves memory, but decreases the chances of " | |
76 | "successfully getting those buffers."); | |
d905b382 JC |
77 | |
78 | static int n_dma_bufs = 3; | |
79 | module_param(n_dma_bufs, uint, 0644); | |
80 | MODULE_PARM_DESC(n_dma_bufs, | |
81 | "The number of DMA buffers to allocate. Can be either two " | |
82 | "(saves memory, makes timing tighter) or three."); | |
83 | ||
84 | static int dma_buf_size = VGA_WIDTH * VGA_HEIGHT * 2; /* Worst case */ | |
85 | module_param(dma_buf_size, uint, 0444); | |
86 | MODULE_PARM_DESC(dma_buf_size, | |
87 | "The size of the allocated DMA buffers. If actual operating " | |
88 | "parameters require larger buffers, an attempt to reallocate " | |
89 | "will be made."); | |
90 | ||
91 | static int min_buffers = 1; | |
92 | module_param(min_buffers, uint, 0644); | |
93 | MODULE_PARM_DESC(min_buffers, | |
94 | "The minimum number of streaming I/O buffers we are willing " | |
95 | "to work with."); | |
96 | ||
97 | static int max_buffers = 10; | |
98 | module_param(max_buffers, uint, 0644); | |
99 | MODULE_PARM_DESC(max_buffers, | |
100 | "The maximum number of streaming I/O buffers an application " | |
101 | "will be allowed to allocate. These buffers are big and live " | |
102 | "in vmalloc space."); | |
103 | ||
ff699e6b | 104 | static int flip; |
d905b382 JC |
105 | module_param(flip, bool, 0444); |
106 | MODULE_PARM_DESC(flip, | |
107 | "If set, the sensor will be instructed to flip the image " | |
108 | "vertically."); | |
109 | ||
110 | ||
111 | enum cafe_state { | |
112 | S_NOTREADY, /* Not yet initialized */ | |
113 | S_IDLE, /* Just hanging around */ | |
114 | S_FLAKED, /* Some sort of problem */ | |
115 | S_SINGLEREAD, /* In read() */ | |
116 | S_SPECREAD, /* Speculative read (for future read()) */ | |
117 | S_STREAMING /* Streaming data */ | |
118 | }; | |
119 | ||
120 | /* | |
121 | * Tracking of streaming I/O buffers. | |
122 | */ | |
123 | struct cafe_sio_buffer { | |
124 | struct list_head list; | |
125 | struct v4l2_buffer v4lbuf; | |
126 | char *buffer; /* Where it lives in kernel space */ | |
127 | int mapcount; | |
128 | struct cafe_camera *cam; | |
129 | }; | |
130 | ||
131 | /* | |
132 | * A description of one of our devices. | |
133 | * Locking: controlled by s_mutex. Certain fields, however, require | |
134 | * the dev_lock spinlock; they are marked as such by comments. | |
135 | * dev_lock is also required for access to device registers. | |
136 | */ | |
137 | struct cafe_camera | |
138 | { | |
21508b90 | 139 | struct v4l2_device v4l2_dev; |
d905b382 JC |
140 | enum cafe_state state; |
141 | unsigned long flags; /* Buffer status, mainly (dev_lock) */ | |
142 | int users; /* How many open FDs */ | |
143 | struct file *owner; /* Who has data access (v4l2) */ | |
144 | ||
145 | /* | |
146 | * Subsystem structures. | |
147 | */ | |
148 | struct pci_dev *pdev; | |
21508b90 | 149 | struct video_device vdev; |
d905b382 | 150 | struct i2c_adapter i2c_adapter; |
8bcfd7af HV |
151 | struct v4l2_subdev *sensor; |
152 | unsigned short sensor_addr; | |
d905b382 JC |
153 | |
154 | unsigned char __iomem *regs; | |
155 | struct list_head dev_list; /* link to other devices */ | |
156 | ||
157 | /* DMA buffers */ | |
158 | unsigned int nbufs; /* How many are alloc'd */ | |
159 | int next_buf; /* Next to consume (dev_lock) */ | |
160 | unsigned int dma_buf_size; /* allocated size */ | |
161 | void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */ | |
162 | dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */ | |
163 | unsigned int specframes; /* Unconsumed spec frames (dev_lock) */ | |
164 | unsigned int sequence; /* Frame sequence number */ | |
165 | unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual buffers */ | |
166 | ||
167 | /* Streaming buffers */ | |
168 | unsigned int n_sbufs; /* How many we have */ | |
169 | struct cafe_sio_buffer *sb_bufs; /* The array of housekeeping structs */ | |
170 | struct list_head sb_avail; /* Available for data (we own) (dev_lock) */ | |
171 | struct list_head sb_full; /* With data (user space owns) (dev_lock) */ | |
172 | struct tasklet_struct s_tasklet; | |
173 | ||
174 | /* Current operating parameters */ | |
3434eb7e | 175 | u32 sensor_type; /* Currently ov7670 only */ |
d905b382 JC |
176 | struct v4l2_pix_format pix_format; |
177 | ||
178 | /* Locks */ | |
179 | struct mutex s_mutex; /* Access to this structure */ | |
180 | spinlock_t dev_lock; /* Access to device */ | |
181 | ||
182 | /* Misc */ | |
183 | wait_queue_head_t smbus_wait; /* Waiting on i2c events */ | |
184 | wait_queue_head_t iowait; /* Waiting on frame data */ | |
185 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
186 | struct dentry *dfs_regs; | |
187 | struct dentry *dfs_cam_regs; | |
188 | #endif | |
189 | }; | |
190 | ||
191 | /* | |
192 | * Status flags. Always manipulated with bit operations. | |
193 | */ | |
194 | #define CF_BUF0_VALID 0 /* Buffers valid - first three */ | |
195 | #define CF_BUF1_VALID 1 | |
196 | #define CF_BUF2_VALID 2 | |
197 | #define CF_DMA_ACTIVE 3 /* A frame is incoming */ | |
198 | #define CF_CONFIG_NEEDED 4 /* Must configure hardware */ | |
199 | ||
8bcfd7af HV |
200 | #define sensor_call(cam, o, f, args...) \ |
201 | v4l2_subdev_call(cam->sensor, o, f, ##args) | |
d905b382 | 202 | |
21508b90 HV |
203 | static inline struct cafe_camera *to_cam(struct v4l2_device *dev) |
204 | { | |
205 | return container_of(dev, struct cafe_camera, v4l2_dev); | |
206 | } | |
207 | ||
d905b382 JC |
208 | |
209 | /* | |
210 | * Start over with DMA buffers - dev_lock needed. | |
211 | */ | |
212 | static void cafe_reset_buffers(struct cafe_camera *cam) | |
213 | { | |
214 | int i; | |
215 | ||
216 | cam->next_buf = -1; | |
217 | for (i = 0; i < cam->nbufs; i++) | |
218 | clear_bit(i, &cam->flags); | |
219 | cam->specframes = 0; | |
220 | } | |
221 | ||
222 | static inline int cafe_needs_config(struct cafe_camera *cam) | |
223 | { | |
224 | return test_bit(CF_CONFIG_NEEDED, &cam->flags); | |
225 | } | |
226 | ||
227 | static void cafe_set_config_needed(struct cafe_camera *cam, int needed) | |
228 | { | |
229 | if (needed) | |
230 | set_bit(CF_CONFIG_NEEDED, &cam->flags); | |
231 | else | |
232 | clear_bit(CF_CONFIG_NEEDED, &cam->flags); | |
233 | } | |
234 | ||
235 | ||
236 | ||
237 | ||
238 | /* | |
239 | * Debugging and related. | |
240 | */ | |
241 | #define cam_err(cam, fmt, arg...) \ | |
242 | dev_err(&(cam)->pdev->dev, fmt, ##arg); | |
243 | #define cam_warn(cam, fmt, arg...) \ | |
244 | dev_warn(&(cam)->pdev->dev, fmt, ##arg); | |
245 | #define cam_dbg(cam, fmt, arg...) \ | |
246 | dev_dbg(&(cam)->pdev->dev, fmt, ##arg); | |
247 | ||
248 | ||
249 | /* ---------------------------------------------------------------------*/ | |
d905b382 | 250 | |
d905b382 JC |
251 | /* |
252 | * Device register I/O | |
253 | */ | |
254 | static inline void cafe_reg_write(struct cafe_camera *cam, unsigned int reg, | |
255 | unsigned int val) | |
256 | { | |
257 | iowrite32(val, cam->regs + reg); | |
258 | } | |
259 | ||
260 | static inline unsigned int cafe_reg_read(struct cafe_camera *cam, | |
261 | unsigned int reg) | |
262 | { | |
263 | return ioread32(cam->regs + reg); | |
264 | } | |
265 | ||
266 | ||
267 | static inline void cafe_reg_write_mask(struct cafe_camera *cam, unsigned int reg, | |
268 | unsigned int val, unsigned int mask) | |
269 | { | |
270 | unsigned int v = cafe_reg_read(cam, reg); | |
271 | ||
272 | v = (v & ~mask) | (val & mask); | |
273 | cafe_reg_write(cam, reg, v); | |
274 | } | |
275 | ||
276 | static inline void cafe_reg_clear_bit(struct cafe_camera *cam, | |
277 | unsigned int reg, unsigned int val) | |
278 | { | |
279 | cafe_reg_write_mask(cam, reg, 0, val); | |
280 | } | |
281 | ||
282 | static inline void cafe_reg_set_bit(struct cafe_camera *cam, | |
283 | unsigned int reg, unsigned int val) | |
284 | { | |
285 | cafe_reg_write_mask(cam, reg, val, val); | |
286 | } | |
287 | ||
288 | ||
289 | ||
290 | /* -------------------------------------------------------------------- */ | |
291 | /* | |
292 | * The I2C/SMBUS interface to the camera itself starts here. The | |
293 | * controller handles SMBUS itself, presenting a relatively simple register | |
294 | * interface; all we have to do is to tell it where to route the data. | |
295 | */ | |
296 | #define CAFE_SMBUS_TIMEOUT (HZ) /* generous */ | |
297 | ||
298 | static int cafe_smbus_write_done(struct cafe_camera *cam) | |
299 | { | |
300 | unsigned long flags; | |
301 | int c1; | |
302 | ||
303 | /* | |
304 | * We must delay after the interrupt, or the controller gets confused | |
305 | * and never does give us good status. Fortunately, we don't do this | |
306 | * often. | |
307 | */ | |
308 | udelay(20); | |
309 | spin_lock_irqsave(&cam->dev_lock, flags); | |
310 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
311 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
312 | return (c1 & (TWSIC1_WSTAT|TWSIC1_ERROR)) != TWSIC1_WSTAT; | |
313 | } | |
314 | ||
315 | static int cafe_smbus_write_data(struct cafe_camera *cam, | |
316 | u16 addr, u8 command, u8 value) | |
317 | { | |
318 | unsigned int rval; | |
319 | unsigned long flags; | |
6d77444a | 320 | DEFINE_WAIT(the_wait); |
d905b382 JC |
321 | |
322 | spin_lock_irqsave(&cam->dev_lock, flags); | |
323 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
324 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
325 | /* | |
326 | * Marvell sez set clkdiv to all 1's for now. | |
327 | */ | |
328 | rval |= TWSIC0_CLKDIV; | |
329 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
330 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
331 | rval = value | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
332 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
333 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
d905b382 | 334 | |
6d77444a JC |
335 | /* |
336 | * Time to wait for the write to complete. THIS IS A RACY | |
337 | * WAY TO DO IT, but the sad fact is that reading the TWSIC1 | |
338 | * register too quickly after starting the operation sends | |
339 | * the device into a place that may be kinder and better, but | |
340 | * which is absolutely useless for controlling the sensor. In | |
341 | * practice we have plenty of time to get into our sleep state | |
342 | * before the interrupt hits, and the worst case is that we | |
343 | * time out and then see that things completed, so this seems | |
344 | * the best way for now. | |
345 | */ | |
346 | do { | |
347 | prepare_to_wait(&cam->smbus_wait, &the_wait, | |
348 | TASK_UNINTERRUPTIBLE); | |
349 | schedule_timeout(1); /* even 1 jiffy is too long */ | |
350 | finish_wait(&cam->smbus_wait, &the_wait); | |
351 | } while (!cafe_smbus_write_done(cam)); | |
352 | ||
353 | #ifdef IF_THE_CAFE_HARDWARE_WORKED_RIGHT | |
d905b382 JC |
354 | wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(cam), |
355 | CAFE_SMBUS_TIMEOUT); | |
6d77444a | 356 | #endif |
d905b382 JC |
357 | spin_lock_irqsave(&cam->dev_lock, flags); |
358 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
359 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
360 | ||
361 | if (rval & TWSIC1_WSTAT) { | |
362 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) timed out\n", addr, | |
363 | command, value); | |
364 | return -EIO; | |
365 | } | |
366 | if (rval & TWSIC1_ERROR) { | |
367 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) error\n", addr, | |
368 | command, value); | |
369 | return -EIO; | |
370 | } | |
371 | return 0; | |
372 | } | |
373 | ||
374 | ||
375 | ||
376 | static int cafe_smbus_read_done(struct cafe_camera *cam) | |
377 | { | |
378 | unsigned long flags; | |
379 | int c1; | |
380 | ||
381 | /* | |
382 | * We must delay after the interrupt, or the controller gets confused | |
383 | * and never does give us good status. Fortunately, we don't do this | |
384 | * often. | |
385 | */ | |
386 | udelay(20); | |
387 | spin_lock_irqsave(&cam->dev_lock, flags); | |
388 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
389 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
390 | return c1 & (TWSIC1_RVALID|TWSIC1_ERROR); | |
391 | } | |
392 | ||
393 | ||
394 | ||
395 | static int cafe_smbus_read_data(struct cafe_camera *cam, | |
396 | u16 addr, u8 command, u8 *value) | |
397 | { | |
398 | unsigned int rval; | |
399 | unsigned long flags; | |
400 | ||
401 | spin_lock_irqsave(&cam->dev_lock, flags); | |
402 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
403 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
404 | /* | |
405 | * Marvel sez set clkdiv to all 1's for now. | |
406 | */ | |
407 | rval |= TWSIC0_CLKDIV; | |
408 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
409 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
410 | rval = TWSIC1_READ | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
411 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
412 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
413 | ||
414 | wait_event_timeout(cam->smbus_wait, | |
415 | cafe_smbus_read_done(cam), CAFE_SMBUS_TIMEOUT); | |
416 | spin_lock_irqsave(&cam->dev_lock, flags); | |
417 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
418 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
419 | ||
420 | if (rval & TWSIC1_ERROR) { | |
421 | cam_err(cam, "SMBUS read (%02x/%02x) error\n", addr, command); | |
422 | return -EIO; | |
423 | } | |
424 | if (! (rval & TWSIC1_RVALID)) { | |
425 | cam_err(cam, "SMBUS read (%02x/%02x) timed out\n", addr, | |
426 | command); | |
427 | return -EIO; | |
428 | } | |
429 | *value = rval & 0xff; | |
430 | return 0; | |
431 | } | |
432 | ||
433 | /* | |
434 | * Perform a transfer over SMBUS. This thing is called under | |
435 | * the i2c bus lock, so we shouldn't race with ourselves... | |
436 | */ | |
437 | static int cafe_smbus_xfer(struct i2c_adapter *adapter, u16 addr, | |
438 | unsigned short flags, char rw, u8 command, | |
439 | int size, union i2c_smbus_data *data) | |
440 | { | |
21508b90 HV |
441 | struct v4l2_device *v4l2_dev = i2c_get_adapdata(adapter); |
442 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
d905b382 JC |
443 | int ret = -EINVAL; |
444 | ||
d905b382 JC |
445 | /* |
446 | * This interface would appear to only do byte data ops. OK | |
447 | * it can do word too, but the cam chip has no use for that. | |
448 | */ | |
449 | if (size != I2C_SMBUS_BYTE_DATA) { | |
450 | cam_err(cam, "funky xfer size %d\n", size); | |
451 | return -EINVAL; | |
452 | } | |
453 | ||
454 | if (rw == I2C_SMBUS_WRITE) | |
455 | ret = cafe_smbus_write_data(cam, addr, command, data->byte); | |
456 | else if (rw == I2C_SMBUS_READ) | |
457 | ret = cafe_smbus_read_data(cam, addr, command, &data->byte); | |
458 | return ret; | |
459 | } | |
460 | ||
461 | ||
462 | static void cafe_smbus_enable_irq(struct cafe_camera *cam) | |
463 | { | |
464 | unsigned long flags; | |
465 | ||
466 | spin_lock_irqsave(&cam->dev_lock, flags); | |
467 | cafe_reg_set_bit(cam, REG_IRQMASK, TWSIIRQS); | |
468 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
469 | } | |
470 | ||
471 | static u32 cafe_smbus_func(struct i2c_adapter *adapter) | |
472 | { | |
473 | return I2C_FUNC_SMBUS_READ_BYTE_DATA | | |
474 | I2C_FUNC_SMBUS_WRITE_BYTE_DATA; | |
475 | } | |
476 | ||
477 | static struct i2c_algorithm cafe_smbus_algo = { | |
478 | .smbus_xfer = cafe_smbus_xfer, | |
479 | .functionality = cafe_smbus_func | |
480 | }; | |
481 | ||
482 | /* Somebody is on the bus */ | |
f9a76156 JC |
483 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam); |
484 | static void cafe_ctlr_power_down(struct cafe_camera *cam); | |
d905b382 | 485 | |
d905b382 JC |
486 | static int cafe_smbus_setup(struct cafe_camera *cam) |
487 | { | |
488 | struct i2c_adapter *adap = &cam->i2c_adapter; | |
489 | int ret; | |
490 | ||
491 | cafe_smbus_enable_irq(cam); | |
492 | adap->id = I2C_HW_SMBUS_CAFE; | |
d905b382 | 493 | adap->owner = THIS_MODULE; |
d905b382 JC |
494 | adap->algo = &cafe_smbus_algo; |
495 | strcpy(adap->name, "cafe_ccic"); | |
12a917f6 | 496 | adap->dev.parent = &cam->pdev->dev; |
21508b90 | 497 | i2c_set_adapdata(adap, &cam->v4l2_dev); |
d905b382 JC |
498 | ret = i2c_add_adapter(adap); |
499 | if (ret) | |
500 | printk(KERN_ERR "Unable to register cafe i2c adapter\n"); | |
501 | return ret; | |
502 | } | |
503 | ||
504 | static void cafe_smbus_shutdown(struct cafe_camera *cam) | |
505 | { | |
506 | i2c_del_adapter(&cam->i2c_adapter); | |
507 | } | |
508 | ||
509 | ||
510 | /* ------------------------------------------------------------------- */ | |
511 | /* | |
512 | * Deal with the controller. | |
513 | */ | |
514 | ||
515 | /* | |
516 | * Do everything we think we need to have the interface operating | |
517 | * according to the desired format. | |
518 | */ | |
519 | static void cafe_ctlr_dma(struct cafe_camera *cam) | |
520 | { | |
521 | /* | |
522 | * Store the first two Y buffers (we aren't supporting | |
523 | * planar formats for now, so no UV bufs). Then either | |
524 | * set the third if it exists, or tell the controller | |
525 | * to just use two. | |
526 | */ | |
527 | cafe_reg_write(cam, REG_Y0BAR, cam->dma_handles[0]); | |
528 | cafe_reg_write(cam, REG_Y1BAR, cam->dma_handles[1]); | |
529 | if (cam->nbufs > 2) { | |
530 | cafe_reg_write(cam, REG_Y2BAR, cam->dma_handles[2]); | |
531 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
532 | } | |
533 | else | |
534 | cafe_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
535 | cafe_reg_write(cam, REG_UBAR, 0); /* 32 bits only for now */ | |
536 | } | |
537 | ||
538 | static void cafe_ctlr_image(struct cafe_camera *cam) | |
539 | { | |
540 | int imgsz; | |
541 | struct v4l2_pix_format *fmt = &cam->pix_format; | |
542 | ||
543 | imgsz = ((fmt->height << IMGSZ_V_SHIFT) & IMGSZ_V_MASK) | | |
544 | (fmt->bytesperline & IMGSZ_H_MASK); | |
545 | cafe_reg_write(cam, REG_IMGSIZE, imgsz); | |
546 | cafe_reg_write(cam, REG_IMGOFFSET, 0); | |
547 | /* YPITCH just drops the last two bits */ | |
548 | cafe_reg_write_mask(cam, REG_IMGPITCH, fmt->bytesperline, | |
549 | IMGP_YP_MASK); | |
550 | /* | |
551 | * Tell the controller about the image format we are using. | |
552 | */ | |
553 | switch (cam->pix_format.pixelformat) { | |
554 | case V4L2_PIX_FMT_YUYV: | |
555 | cafe_reg_write_mask(cam, REG_CTRL0, | |
556 | C0_DF_YUV|C0_YUV_PACKED|C0_YUVE_YUYV, | |
557 | C0_DF_MASK); | |
558 | break; | |
559 | ||
d905b382 JC |
560 | case V4L2_PIX_FMT_RGB444: |
561 | cafe_reg_write_mask(cam, REG_CTRL0, | |
562 | C0_DF_RGB|C0_RGBF_444|C0_RGB4_XRGB, | |
563 | C0_DF_MASK); | |
564 | /* Alpha value? */ | |
565 | break; | |
566 | ||
567 | case V4L2_PIX_FMT_RGB565: | |
568 | cafe_reg_write_mask(cam, REG_CTRL0, | |
569 | C0_DF_RGB|C0_RGBF_565|C0_RGB5_BGGR, | |
570 | C0_DF_MASK); | |
571 | break; | |
572 | ||
573 | default: | |
574 | cam_err(cam, "Unknown format %x\n", cam->pix_format.pixelformat); | |
575 | break; | |
576 | } | |
577 | /* | |
578 | * Make sure it knows we want to use hsync/vsync. | |
579 | */ | |
580 | cafe_reg_write_mask(cam, REG_CTRL0, C0_SIF_HVSYNC, | |
581 | C0_SIFM_MASK); | |
582 | } | |
583 | ||
584 | ||
585 | /* | |
586 | * Configure the controller for operation; caller holds the | |
587 | * device mutex. | |
588 | */ | |
589 | static int cafe_ctlr_configure(struct cafe_camera *cam) | |
590 | { | |
591 | unsigned long flags; | |
592 | ||
593 | spin_lock_irqsave(&cam->dev_lock, flags); | |
594 | cafe_ctlr_dma(cam); | |
595 | cafe_ctlr_image(cam); | |
596 | cafe_set_config_needed(cam, 0); | |
597 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
598 | return 0; | |
599 | } | |
600 | ||
601 | static void cafe_ctlr_irq_enable(struct cafe_camera *cam) | |
602 | { | |
603 | /* | |
604 | * Clear any pending interrupts, since we do not | |
605 | * expect to have I/O active prior to enabling. | |
606 | */ | |
607 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); | |
608 | cafe_reg_set_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
609 | } | |
610 | ||
611 | static void cafe_ctlr_irq_disable(struct cafe_camera *cam) | |
612 | { | |
613 | cafe_reg_clear_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
614 | } | |
615 | ||
616 | /* | |
617 | * Make the controller start grabbing images. Everything must | |
618 | * be set up before doing this. | |
619 | */ | |
620 | static void cafe_ctlr_start(struct cafe_camera *cam) | |
621 | { | |
622 | /* set_bit performs a read, so no other barrier should be | |
623 | needed here */ | |
624 | cafe_reg_set_bit(cam, REG_CTRL0, C0_ENABLE); | |
625 | } | |
626 | ||
627 | static void cafe_ctlr_stop(struct cafe_camera *cam) | |
628 | { | |
629 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
630 | } | |
631 | ||
632 | static void cafe_ctlr_init(struct cafe_camera *cam) | |
633 | { | |
634 | unsigned long flags; | |
635 | ||
636 | spin_lock_irqsave(&cam->dev_lock, flags); | |
637 | /* | |
638 | * Added magic to bring up the hardware on the B-Test board | |
639 | */ | |
640 | cafe_reg_write(cam, 0x3038, 0x8); | |
641 | cafe_reg_write(cam, 0x315c, 0x80008); | |
642 | /* | |
643 | * Go through the dance needed to wake the device up. | |
644 | * Note that these registers are global and shared | |
645 | * with the NAND and SD devices. Interaction between the | |
646 | * three still needs to be examined. | |
647 | */ | |
648 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRS|GCSR_MRS); /* Needed? */ | |
649 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRC); | |
650 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRS); | |
5b50ed7c JC |
651 | /* |
652 | * Here we must wait a bit for the controller to come around. | |
653 | */ | |
654 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
70cd685d | 655 | msleep(5); |
5b50ed7c JC |
656 | spin_lock_irqsave(&cam->dev_lock, flags); |
657 | ||
d905b382 JC |
658 | cafe_reg_write(cam, REG_GL_CSR, GCSR_CCIC_EN|GCSR_SRC|GCSR_MRC); |
659 | cafe_reg_set_bit(cam, REG_GL_IMASK, GIMSK_CCIC_EN); | |
660 | /* | |
661 | * Make sure it's not powered down. | |
662 | */ | |
663 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
664 | /* | |
665 | * Turn off the enable bit. It sure should be off anyway, | |
666 | * but it's good to be sure. | |
667 | */ | |
668 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
669 | /* | |
670 | * Mask all interrupts. | |
671 | */ | |
672 | cafe_reg_write(cam, REG_IRQMASK, 0); | |
673 | /* | |
674 | * Clock the sensor appropriately. Controller clock should | |
675 | * be 48MHz, sensor "typical" value is half that. | |
676 | */ | |
677 | cafe_reg_write_mask(cam, REG_CLKCTRL, 2, CLK_DIV_MASK); | |
678 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
679 | } | |
680 | ||
681 | ||
682 | /* | |
683 | * Stop the controller, and don't return until we're really sure that no | |
684 | * further DMA is going on. | |
685 | */ | |
686 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam) | |
687 | { | |
688 | unsigned long flags; | |
689 | ||
690 | /* | |
691 | * Theory: stop the camera controller (whether it is operating | |
692 | * or not). Delay briefly just in case we race with the SOF | |
693 | * interrupt, then wait until no DMA is active. | |
694 | */ | |
695 | spin_lock_irqsave(&cam->dev_lock, flags); | |
696 | cafe_ctlr_stop(cam); | |
697 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
698 | mdelay(1); | |
699 | wait_event_timeout(cam->iowait, | |
700 | !test_bit(CF_DMA_ACTIVE, &cam->flags), HZ); | |
701 | if (test_bit(CF_DMA_ACTIVE, &cam->flags)) | |
702 | cam_err(cam, "Timeout waiting for DMA to end\n"); | |
703 | /* This would be bad news - what now? */ | |
704 | spin_lock_irqsave(&cam->dev_lock, flags); | |
705 | cam->state = S_IDLE; | |
706 | cafe_ctlr_irq_disable(cam); | |
707 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
708 | } | |
709 | ||
710 | /* | |
711 | * Power up and down. | |
712 | */ | |
713 | static void cafe_ctlr_power_up(struct cafe_camera *cam) | |
714 | { | |
715 | unsigned long flags; | |
716 | ||
717 | spin_lock_irqsave(&cam->dev_lock, flags); | |
718 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
7acf90c7 JC |
719 | /* |
720 | * Part one of the sensor dance: turn the global | |
721 | * GPIO signal on. | |
722 | */ | |
723 | cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON); | |
724 | cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT|GGPIO_VAL); | |
d905b382 JC |
725 | /* |
726 | * Put the sensor into operational mode (assumes OLPC-style | |
727 | * wiring). Control 0 is reset - set to 1 to operate. | |
728 | * Control 1 is power down, set to 0 to operate. | |
729 | */ | |
f9a76156 | 730 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN); /* pwr up, reset */ |
21508b90 | 731 | /* mdelay(1); */ /* Marvell says 1ms will do it */ |
d905b382 | 732 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C0); |
21508b90 | 733 | /* mdelay(1); */ /* Enough? */ |
d905b382 | 734 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
7acf90c7 | 735 | msleep(5); /* Just to be sure */ |
d905b382 JC |
736 | } |
737 | ||
738 | static void cafe_ctlr_power_down(struct cafe_camera *cam) | |
739 | { | |
740 | unsigned long flags; | |
741 | ||
742 | spin_lock_irqsave(&cam->dev_lock, flags); | |
743 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C1); | |
7acf90c7 JC |
744 | cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON); |
745 | cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT); | |
d905b382 JC |
746 | cafe_reg_set_bit(cam, REG_CTRL1, C1_PWRDWN); |
747 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
748 | } | |
749 | ||
750 | /* -------------------------------------------------------------------- */ | |
751 | /* | |
752 | * Communications with the sensor. | |
753 | */ | |
754 | ||
d905b382 JC |
755 | static int __cafe_cam_reset(struct cafe_camera *cam) |
756 | { | |
8bcfd7af | 757 | return sensor_call(cam, core, reset, 0); |
d905b382 JC |
758 | } |
759 | ||
760 | /* | |
761 | * We have found the sensor on the i2c. Let's try to have a | |
762 | * conversation. | |
763 | */ | |
764 | static int cafe_cam_init(struct cafe_camera *cam) | |
765 | { | |
aecde8b5 | 766 | struct v4l2_dbg_chip_ident chip; |
d905b382 JC |
767 | int ret; |
768 | ||
769 | mutex_lock(&cam->s_mutex); | |
770 | if (cam->state != S_NOTREADY) | |
771 | cam_warn(cam, "Cam init with device in funky state %d", | |
772 | cam->state); | |
773 | ret = __cafe_cam_reset(cam); | |
774 | if (ret) | |
775 | goto out; | |
aecde8b5 | 776 | chip.match.type = V4L2_CHIP_MATCH_I2C_ADDR; |
8bcfd7af HV |
777 | chip.match.addr = cam->sensor_addr; |
778 | ret = sensor_call(cam, core, g_chip_ident, &chip); | |
d905b382 JC |
779 | if (ret) |
780 | goto out; | |
3434eb7e | 781 | cam->sensor_type = chip.ident; |
d905b382 | 782 | if (cam->sensor_type != V4L2_IDENT_OV7670) { |
8bcfd7af | 783 | cam_err(cam, "Unsupported sensor type 0x%x", cam->sensor_type); |
d905b382 JC |
784 | ret = -EINVAL; |
785 | goto out; | |
786 | } | |
787 | /* Get/set parameters? */ | |
788 | ret = 0; | |
789 | cam->state = S_IDLE; | |
790 | out: | |
7acf90c7 | 791 | cafe_ctlr_power_down(cam); |
d905b382 JC |
792 | mutex_unlock(&cam->s_mutex); |
793 | return ret; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Configure the sensor to match the parameters we have. Caller should | |
798 | * hold s_mutex | |
799 | */ | |
800 | static int cafe_cam_set_flip(struct cafe_camera *cam) | |
801 | { | |
802 | struct v4l2_control ctrl; | |
803 | ||
804 | memset(&ctrl, 0, sizeof(ctrl)); | |
805 | ctrl.id = V4L2_CID_VFLIP; | |
806 | ctrl.value = flip; | |
8bcfd7af | 807 | return sensor_call(cam, core, s_ctrl, &ctrl); |
d905b382 JC |
808 | } |
809 | ||
810 | ||
811 | static int cafe_cam_configure(struct cafe_camera *cam) | |
812 | { | |
813 | struct v4l2_format fmt; | |
8bcfd7af | 814 | int ret; |
d905b382 JC |
815 | |
816 | if (cam->state != S_IDLE) | |
817 | return -EINVAL; | |
818 | fmt.fmt.pix = cam->pix_format; | |
8bcfd7af | 819 | ret = sensor_call(cam, core, init, 0); |
d905b382 | 820 | if (ret == 0) |
8bcfd7af | 821 | ret = sensor_call(cam, video, s_fmt, &fmt); |
d905b382 JC |
822 | /* |
823 | * OV7670 does weird things if flip is set *before* format... | |
824 | */ | |
825 | ret += cafe_cam_set_flip(cam); | |
826 | return ret; | |
827 | } | |
828 | ||
829 | /* -------------------------------------------------------------------- */ | |
830 | /* | |
831 | * DMA buffer management. These functions need s_mutex held. | |
832 | */ | |
833 | ||
834 | /* FIXME: this is inefficient as hell, since dma_alloc_coherent just | |
835 | * does a get_free_pages() call, and we waste a good chunk of an orderN | |
836 | * allocation. Should try to allocate the whole set in one chunk. | |
837 | */ | |
838 | static int cafe_alloc_dma_bufs(struct cafe_camera *cam, int loadtime) | |
839 | { | |
840 | int i; | |
841 | ||
842 | cafe_set_config_needed(cam, 1); | |
843 | if (loadtime) | |
844 | cam->dma_buf_size = dma_buf_size; | |
a66d2336 | 845 | else |
d905b382 | 846 | cam->dma_buf_size = cam->pix_format.sizeimage; |
d905b382 JC |
847 | if (n_dma_bufs > 3) |
848 | n_dma_bufs = 3; | |
849 | ||
850 | cam->nbufs = 0; | |
851 | for (i = 0; i < n_dma_bufs; i++) { | |
852 | cam->dma_bufs[i] = dma_alloc_coherent(&cam->pdev->dev, | |
853 | cam->dma_buf_size, cam->dma_handles + i, | |
854 | GFP_KERNEL); | |
855 | if (cam->dma_bufs[i] == NULL) { | |
856 | cam_warn(cam, "Failed to allocate DMA buffer\n"); | |
857 | break; | |
858 | } | |
859 | /* For debug, remove eventually */ | |
860 | memset(cam->dma_bufs[i], 0xcc, cam->dma_buf_size); | |
861 | (cam->nbufs)++; | |
862 | } | |
863 | ||
864 | switch (cam->nbufs) { | |
865 | case 1: | |
866 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
867 | cam->dma_bufs[0], cam->dma_handles[0]); | |
868 | cam->nbufs = 0; | |
869 | case 0: | |
870 | cam_err(cam, "Insufficient DMA buffers, cannot operate\n"); | |
871 | return -ENOMEM; | |
872 | ||
873 | case 2: | |
874 | if (n_dma_bufs > 2) | |
875 | cam_warn(cam, "Will limp along with only 2 buffers\n"); | |
876 | break; | |
877 | } | |
878 | return 0; | |
879 | } | |
880 | ||
881 | static void cafe_free_dma_bufs(struct cafe_camera *cam) | |
882 | { | |
883 | int i; | |
884 | ||
885 | for (i = 0; i < cam->nbufs; i++) { | |
886 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
887 | cam->dma_bufs[i], cam->dma_handles[i]); | |
888 | cam->dma_bufs[i] = NULL; | |
889 | } | |
890 | cam->nbufs = 0; | |
891 | } | |
892 | ||
893 | ||
894 | ||
895 | ||
896 | ||
897 | /* ----------------------------------------------------------------------- */ | |
898 | /* | |
899 | * Here starts the V4L2 interface code. | |
900 | */ | |
901 | ||
902 | /* | |
903 | * Read an image from the device. | |
904 | */ | |
905 | static ssize_t cafe_deliver_buffer(struct cafe_camera *cam, | |
906 | char __user *buffer, size_t len, loff_t *pos) | |
907 | { | |
908 | int bufno; | |
909 | unsigned long flags; | |
910 | ||
911 | spin_lock_irqsave(&cam->dev_lock, flags); | |
912 | if (cam->next_buf < 0) { | |
913 | cam_err(cam, "deliver_buffer: No next buffer\n"); | |
914 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
915 | return -EIO; | |
916 | } | |
917 | bufno = cam->next_buf; | |
918 | clear_bit(bufno, &cam->flags); | |
919 | if (++(cam->next_buf) >= cam->nbufs) | |
920 | cam->next_buf = 0; | |
921 | if (! test_bit(cam->next_buf, &cam->flags)) | |
922 | cam->next_buf = -1; | |
923 | cam->specframes = 0; | |
924 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
925 | ||
926 | if (len > cam->pix_format.sizeimage) | |
927 | len = cam->pix_format.sizeimage; | |
928 | if (copy_to_user(buffer, cam->dma_bufs[bufno], len)) | |
929 | return -EFAULT; | |
930 | (*pos) += len; | |
931 | return len; | |
932 | } | |
933 | ||
934 | /* | |
935 | * Get everything ready, and start grabbing frames. | |
936 | */ | |
937 | static int cafe_read_setup(struct cafe_camera *cam, enum cafe_state state) | |
938 | { | |
939 | int ret; | |
940 | unsigned long flags; | |
941 | ||
942 | /* | |
943 | * Configuration. If we still don't have DMA buffers, | |
944 | * make one last, desperate attempt. | |
945 | */ | |
946 | if (cam->nbufs == 0) | |
947 | if (cafe_alloc_dma_bufs(cam, 0)) | |
948 | return -ENOMEM; | |
949 | ||
950 | if (cafe_needs_config(cam)) { | |
951 | cafe_cam_configure(cam); | |
952 | ret = cafe_ctlr_configure(cam); | |
953 | if (ret) | |
954 | return ret; | |
955 | } | |
956 | ||
957 | /* | |
958 | * Turn it loose. | |
959 | */ | |
960 | spin_lock_irqsave(&cam->dev_lock, flags); | |
961 | cafe_reset_buffers(cam); | |
962 | cafe_ctlr_irq_enable(cam); | |
963 | cam->state = state; | |
964 | cafe_ctlr_start(cam); | |
965 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | ||
970 | static ssize_t cafe_v4l_read(struct file *filp, | |
971 | char __user *buffer, size_t len, loff_t *pos) | |
972 | { | |
973 | struct cafe_camera *cam = filp->private_data; | |
b9109b75 | 974 | int ret = 0; |
d905b382 JC |
975 | |
976 | /* | |
977 | * Perhaps we're in speculative read mode and already | |
978 | * have data? | |
979 | */ | |
980 | mutex_lock(&cam->s_mutex); | |
981 | if (cam->state == S_SPECREAD) { | |
982 | if (cam->next_buf >= 0) { | |
983 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
984 | if (ret != 0) | |
985 | goto out_unlock; | |
986 | } | |
987 | } else if (cam->state == S_FLAKED || cam->state == S_NOTREADY) { | |
988 | ret = -EIO; | |
989 | goto out_unlock; | |
990 | } else if (cam->state != S_IDLE) { | |
991 | ret = -EBUSY; | |
992 | goto out_unlock; | |
993 | } | |
994 | ||
995 | /* | |
996 | * v4l2: multiple processes can open the device, but only | |
997 | * one gets to grab data from it. | |
998 | */ | |
999 | if (cam->owner && cam->owner != filp) { | |
1000 | ret = -EBUSY; | |
1001 | goto out_unlock; | |
1002 | } | |
1003 | cam->owner = filp; | |
1004 | ||
1005 | /* | |
1006 | * Do setup if need be. | |
1007 | */ | |
1008 | if (cam->state != S_SPECREAD) { | |
1009 | ret = cafe_read_setup(cam, S_SINGLEREAD); | |
1010 | if (ret) | |
1011 | goto out_unlock; | |
1012 | } | |
1013 | /* | |
1014 | * Wait for something to happen. This should probably | |
1015 | * be interruptible (FIXME). | |
1016 | */ | |
1017 | wait_event_timeout(cam->iowait, cam->next_buf >= 0, HZ); | |
1018 | if (cam->next_buf < 0) { | |
1019 | cam_err(cam, "read() operation timed out\n"); | |
1020 | cafe_ctlr_stop_dma(cam); | |
1021 | ret = -EIO; | |
1022 | goto out_unlock; | |
1023 | } | |
1024 | /* | |
1025 | * Give them their data and we should be done. | |
1026 | */ | |
1027 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
1028 | ||
1029 | out_unlock: | |
1030 | mutex_unlock(&cam->s_mutex); | |
1031 | return ret; | |
1032 | } | |
1033 | ||
1034 | ||
1035 | ||
1036 | ||
1037 | ||
1038 | ||
1039 | ||
1040 | ||
1041 | /* | |
1042 | * Streaming I/O support. | |
1043 | */ | |
1044 | ||
1045 | ||
1046 | ||
1047 | static int cafe_vidioc_streamon(struct file *filp, void *priv, | |
1048 | enum v4l2_buf_type type) | |
1049 | { | |
1050 | struct cafe_camera *cam = filp->private_data; | |
1051 | int ret = -EINVAL; | |
1052 | ||
1053 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1054 | goto out; | |
1055 | mutex_lock(&cam->s_mutex); | |
1056 | if (cam->state != S_IDLE || cam->n_sbufs == 0) | |
1057 | goto out_unlock; | |
1058 | ||
1059 | cam->sequence = 0; | |
1060 | ret = cafe_read_setup(cam, S_STREAMING); | |
1061 | ||
1062 | out_unlock: | |
1063 | mutex_unlock(&cam->s_mutex); | |
1064 | out: | |
1065 | return ret; | |
1066 | } | |
1067 | ||
1068 | ||
1069 | static int cafe_vidioc_streamoff(struct file *filp, void *priv, | |
1070 | enum v4l2_buf_type type) | |
1071 | { | |
1072 | struct cafe_camera *cam = filp->private_data; | |
1073 | int ret = -EINVAL; | |
1074 | ||
1075 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1076 | goto out; | |
1077 | mutex_lock(&cam->s_mutex); | |
1078 | if (cam->state != S_STREAMING) | |
1079 | goto out_unlock; | |
1080 | ||
1081 | cafe_ctlr_stop_dma(cam); | |
1082 | ret = 0; | |
1083 | ||
1084 | out_unlock: | |
1085 | mutex_unlock(&cam->s_mutex); | |
1086 | out: | |
1087 | return ret; | |
1088 | } | |
1089 | ||
1090 | ||
1091 | ||
1092 | static int cafe_setup_siobuf(struct cafe_camera *cam, int index) | |
1093 | { | |
1094 | struct cafe_sio_buffer *buf = cam->sb_bufs + index; | |
1095 | ||
1096 | INIT_LIST_HEAD(&buf->list); | |
1097 | buf->v4lbuf.length = PAGE_ALIGN(cam->pix_format.sizeimage); | |
1098 | buf->buffer = vmalloc_user(buf->v4lbuf.length); | |
1099 | if (buf->buffer == NULL) | |
1100 | return -ENOMEM; | |
1101 | buf->mapcount = 0; | |
1102 | buf->cam = cam; | |
1103 | ||
1104 | buf->v4lbuf.index = index; | |
1105 | buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1106 | buf->v4lbuf.field = V4L2_FIELD_NONE; | |
1107 | buf->v4lbuf.memory = V4L2_MEMORY_MMAP; | |
1108 | /* | |
c1accaa2 | 1109 | * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg |
d905b382 JC |
1110 | * just uses the length times the index, but the spec warns |
1111 | * against doing just that - vma merging problems. So we | |
1112 | * leave a gap between each pair of buffers. | |
1113 | */ | |
1114 | buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length; | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static int cafe_free_sio_buffers(struct cafe_camera *cam) | |
1119 | { | |
1120 | int i; | |
1121 | ||
1122 | /* | |
1123 | * If any buffers are mapped, we cannot free them at all. | |
1124 | */ | |
1125 | for (i = 0; i < cam->n_sbufs; i++) | |
1126 | if (cam->sb_bufs[i].mapcount > 0) | |
1127 | return -EBUSY; | |
1128 | /* | |
1129 | * OK, let's do it. | |
1130 | */ | |
1131 | for (i = 0; i < cam->n_sbufs; i++) | |
1132 | vfree(cam->sb_bufs[i].buffer); | |
1133 | cam->n_sbufs = 0; | |
1134 | kfree(cam->sb_bufs); | |
1135 | cam->sb_bufs = NULL; | |
1136 | INIT_LIST_HEAD(&cam->sb_avail); | |
1137 | INIT_LIST_HEAD(&cam->sb_full); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | ||
1142 | ||
1143 | static int cafe_vidioc_reqbufs(struct file *filp, void *priv, | |
1144 | struct v4l2_requestbuffers *req) | |
1145 | { | |
1146 | struct cafe_camera *cam = filp->private_data; | |
3198cf67 | 1147 | int ret = 0; /* Silence warning */ |
d905b382 JC |
1148 | |
1149 | /* | |
1150 | * Make sure it's something we can do. User pointers could be | |
1151 | * implemented without great pain, but that's not been done yet. | |
1152 | */ | |
1153 | if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1154 | return -EINVAL; | |
1155 | if (req->memory != V4L2_MEMORY_MMAP) | |
1156 | return -EINVAL; | |
1157 | /* | |
1158 | * If they ask for zero buffers, they really want us to stop streaming | |
1159 | * (if it's happening) and free everything. Should we check owner? | |
1160 | */ | |
1161 | mutex_lock(&cam->s_mutex); | |
1162 | if (req->count == 0) { | |
1163 | if (cam->state == S_STREAMING) | |
1164 | cafe_ctlr_stop_dma(cam); | |
1165 | ret = cafe_free_sio_buffers (cam); | |
1166 | goto out; | |
1167 | } | |
1168 | /* | |
1169 | * Device needs to be idle and working. We *could* try to do the | |
1170 | * right thing in S_SPECREAD by shutting things down, but it | |
1171 | * probably doesn't matter. | |
1172 | */ | |
1173 | if (cam->state != S_IDLE || (cam->owner && cam->owner != filp)) { | |
1174 | ret = -EBUSY; | |
1175 | goto out; | |
1176 | } | |
1177 | cam->owner = filp; | |
1178 | ||
1179 | if (req->count < min_buffers) | |
1180 | req->count = min_buffers; | |
1181 | else if (req->count > max_buffers) | |
1182 | req->count = max_buffers; | |
1183 | if (cam->n_sbufs > 0) { | |
1184 | ret = cafe_free_sio_buffers(cam); | |
1185 | if (ret) | |
1186 | goto out; | |
1187 | } | |
1188 | ||
1189 | cam->sb_bufs = kzalloc(req->count*sizeof(struct cafe_sio_buffer), | |
1190 | GFP_KERNEL); | |
1191 | if (cam->sb_bufs == NULL) { | |
1192 | ret = -ENOMEM; | |
1193 | goto out; | |
1194 | } | |
1195 | for (cam->n_sbufs = 0; cam->n_sbufs < req->count; (cam->n_sbufs++)) { | |
1196 | ret = cafe_setup_siobuf(cam, cam->n_sbufs); | |
1197 | if (ret) | |
1198 | break; | |
1199 | } | |
1200 | ||
1201 | if (cam->n_sbufs == 0) /* no luck at all - ret already set */ | |
1202 | kfree(cam->sb_bufs); | |
d905b382 JC |
1203 | req->count = cam->n_sbufs; /* In case of partial success */ |
1204 | ||
1205 | out: | |
1206 | mutex_unlock(&cam->s_mutex); | |
1207 | return ret; | |
1208 | } | |
1209 | ||
1210 | ||
1211 | static int cafe_vidioc_querybuf(struct file *filp, void *priv, | |
1212 | struct v4l2_buffer *buf) | |
1213 | { | |
1214 | struct cafe_camera *cam = filp->private_data; | |
1215 | int ret = -EINVAL; | |
1216 | ||
1217 | mutex_lock(&cam->s_mutex); | |
1218 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1219 | goto out; | |
1220 | if (buf->index < 0 || buf->index >= cam->n_sbufs) | |
1221 | goto out; | |
1222 | *buf = cam->sb_bufs[buf->index].v4lbuf; | |
1223 | ret = 0; | |
1224 | out: | |
1225 | mutex_unlock(&cam->s_mutex); | |
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | static int cafe_vidioc_qbuf(struct file *filp, void *priv, | |
1230 | struct v4l2_buffer *buf) | |
1231 | { | |
1232 | struct cafe_camera *cam = filp->private_data; | |
1233 | struct cafe_sio_buffer *sbuf; | |
1234 | int ret = -EINVAL; | |
1235 | unsigned long flags; | |
1236 | ||
1237 | mutex_lock(&cam->s_mutex); | |
1238 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1239 | goto out; | |
1240 | if (buf->index < 0 || buf->index >= cam->n_sbufs) | |
1241 | goto out; | |
1242 | sbuf = cam->sb_bufs + buf->index; | |
1243 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) { | |
1244 | ret = 0; /* Already queued?? */ | |
1245 | goto out; | |
1246 | } | |
1247 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_DONE) { | |
1248 | /* Spec doesn't say anything, seems appropriate tho */ | |
1249 | ret = -EBUSY; | |
1250 | goto out; | |
1251 | } | |
1252 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED; | |
1253 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1254 | list_add(&sbuf->list, &cam->sb_avail); | |
1255 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1256 | ret = 0; | |
1257 | out: | |
1258 | mutex_unlock(&cam->s_mutex); | |
1259 | return ret; | |
1260 | } | |
1261 | ||
1262 | static int cafe_vidioc_dqbuf(struct file *filp, void *priv, | |
1263 | struct v4l2_buffer *buf) | |
1264 | { | |
1265 | struct cafe_camera *cam = filp->private_data; | |
1266 | struct cafe_sio_buffer *sbuf; | |
1267 | int ret = -EINVAL; | |
1268 | unsigned long flags; | |
1269 | ||
1270 | mutex_lock(&cam->s_mutex); | |
1271 | if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1272 | goto out_unlock; | |
1273 | if (cam->state != S_STREAMING) | |
1274 | goto out_unlock; | |
1275 | if (list_empty(&cam->sb_full) && filp->f_flags & O_NONBLOCK) { | |
1276 | ret = -EAGAIN; | |
1277 | goto out_unlock; | |
1278 | } | |
1279 | ||
1280 | while (list_empty(&cam->sb_full) && cam->state == S_STREAMING) { | |
1281 | mutex_unlock(&cam->s_mutex); | |
1282 | if (wait_event_interruptible(cam->iowait, | |
1283 | !list_empty(&cam->sb_full))) { | |
1284 | ret = -ERESTARTSYS; | |
1285 | goto out; | |
1286 | } | |
1287 | mutex_lock(&cam->s_mutex); | |
1288 | } | |
1289 | ||
1290 | if (cam->state != S_STREAMING) | |
1291 | ret = -EINTR; | |
1292 | else { | |
1293 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1294 | /* Should probably recheck !list_empty() here */ | |
1295 | sbuf = list_entry(cam->sb_full.next, | |
1296 | struct cafe_sio_buffer, list); | |
1297 | list_del_init(&sbuf->list); | |
1298 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1299 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE; | |
1300 | *buf = sbuf->v4lbuf; | |
1301 | ret = 0; | |
1302 | } | |
1303 | ||
1304 | out_unlock: | |
1305 | mutex_unlock(&cam->s_mutex); | |
1306 | out: | |
1307 | return ret; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | ||
1312 | static void cafe_v4l_vm_open(struct vm_area_struct *vma) | |
1313 | { | |
1314 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1315 | /* | |
1316 | * Locking: done under mmap_sem, so we don't need to | |
1317 | * go back to the camera lock here. | |
1318 | */ | |
1319 | sbuf->mapcount++; | |
1320 | } | |
1321 | ||
1322 | ||
1323 | static void cafe_v4l_vm_close(struct vm_area_struct *vma) | |
1324 | { | |
1325 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1326 | ||
1327 | mutex_lock(&sbuf->cam->s_mutex); | |
1328 | sbuf->mapcount--; | |
1329 | /* Docs say we should stop I/O too... */ | |
1330 | if (sbuf->mapcount == 0) | |
1331 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
1332 | mutex_unlock(&sbuf->cam->s_mutex); | |
1333 | } | |
1334 | ||
1335 | static struct vm_operations_struct cafe_v4l_vm_ops = { | |
1336 | .open = cafe_v4l_vm_open, | |
1337 | .close = cafe_v4l_vm_close | |
1338 | }; | |
1339 | ||
1340 | ||
1341 | static int cafe_v4l_mmap(struct file *filp, struct vm_area_struct *vma) | |
1342 | { | |
1343 | struct cafe_camera *cam = filp->private_data; | |
1344 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
1345 | int ret = -EINVAL; | |
1346 | int i; | |
1347 | struct cafe_sio_buffer *sbuf = NULL; | |
1348 | ||
1349 | if (! (vma->vm_flags & VM_WRITE) || ! (vma->vm_flags & VM_SHARED)) | |
1350 | return -EINVAL; | |
1351 | /* | |
1352 | * Find the buffer they are looking for. | |
1353 | */ | |
1354 | mutex_lock(&cam->s_mutex); | |
1355 | for (i = 0; i < cam->n_sbufs; i++) | |
1356 | if (cam->sb_bufs[i].v4lbuf.m.offset == offset) { | |
1357 | sbuf = cam->sb_bufs + i; | |
1358 | break; | |
1359 | } | |
1360 | if (sbuf == NULL) | |
1361 | goto out; | |
1362 | ||
1363 | ret = remap_vmalloc_range(vma, sbuf->buffer, 0); | |
1364 | if (ret) | |
1365 | goto out; | |
1366 | vma->vm_flags |= VM_DONTEXPAND; | |
1367 | vma->vm_private_data = sbuf; | |
1368 | vma->vm_ops = &cafe_v4l_vm_ops; | |
1369 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED; | |
1370 | cafe_v4l_vm_open(vma); | |
1371 | ret = 0; | |
1372 | out: | |
1373 | mutex_unlock(&cam->s_mutex); | |
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | ||
1378 | ||
bec43661 | 1379 | static int cafe_v4l_open(struct file *filp) |
d905b382 | 1380 | { |
21508b90 | 1381 | struct cafe_camera *cam = video_drvdata(filp); |
d905b382 | 1382 | |
d905b382 JC |
1383 | filp->private_data = cam; |
1384 | ||
1385 | mutex_lock(&cam->s_mutex); | |
1386 | if (cam->users == 0) { | |
1387 | cafe_ctlr_power_up(cam); | |
1388 | __cafe_cam_reset(cam); | |
1389 | cafe_set_config_needed(cam, 1); | |
1390 | /* FIXME make sure this is complete */ | |
1391 | } | |
1392 | (cam->users)++; | |
1393 | mutex_unlock(&cam->s_mutex); | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | ||
bec43661 | 1398 | static int cafe_v4l_release(struct file *filp) |
d905b382 JC |
1399 | { |
1400 | struct cafe_camera *cam = filp->private_data; | |
1401 | ||
1402 | mutex_lock(&cam->s_mutex); | |
1403 | (cam->users)--; | |
1404 | if (filp == cam->owner) { | |
1405 | cafe_ctlr_stop_dma(cam); | |
1406 | cafe_free_sio_buffers(cam); | |
1407 | cam->owner = NULL; | |
1408 | } | |
f9a76156 | 1409 | if (cam->users == 0) { |
d905b382 | 1410 | cafe_ctlr_power_down(cam); |
23869e23 | 1411 | if (alloc_bufs_at_read) |
f9a76156 JC |
1412 | cafe_free_dma_bufs(cam); |
1413 | } | |
d905b382 JC |
1414 | mutex_unlock(&cam->s_mutex); |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | ||
1419 | ||
1420 | static unsigned int cafe_v4l_poll(struct file *filp, | |
1421 | struct poll_table_struct *pt) | |
1422 | { | |
1423 | struct cafe_camera *cam = filp->private_data; | |
1424 | ||
1425 | poll_wait(filp, &cam->iowait, pt); | |
1426 | if (cam->next_buf >= 0) | |
1427 | return POLLIN | POLLRDNORM; | |
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | ||
1432 | ||
1433 | static int cafe_vidioc_queryctrl(struct file *filp, void *priv, | |
1434 | struct v4l2_queryctrl *qc) | |
1435 | { | |
21508b90 | 1436 | struct cafe_camera *cam = priv; |
d905b382 JC |
1437 | int ret; |
1438 | ||
1439 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1440 | ret = sensor_call(cam, core, queryctrl, qc); |
d905b382 JC |
1441 | mutex_unlock(&cam->s_mutex); |
1442 | return ret; | |
1443 | } | |
1444 | ||
1445 | ||
1446 | static int cafe_vidioc_g_ctrl(struct file *filp, void *priv, | |
1447 | struct v4l2_control *ctrl) | |
1448 | { | |
21508b90 | 1449 | struct cafe_camera *cam = priv; |
d905b382 JC |
1450 | int ret; |
1451 | ||
1452 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1453 | ret = sensor_call(cam, core, g_ctrl, ctrl); |
d905b382 JC |
1454 | mutex_unlock(&cam->s_mutex); |
1455 | return ret; | |
1456 | } | |
1457 | ||
1458 | ||
1459 | static int cafe_vidioc_s_ctrl(struct file *filp, void *priv, | |
1460 | struct v4l2_control *ctrl) | |
1461 | { | |
21508b90 | 1462 | struct cafe_camera *cam = priv; |
d905b382 JC |
1463 | int ret; |
1464 | ||
1465 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1466 | ret = sensor_call(cam, core, s_ctrl, ctrl); |
d905b382 JC |
1467 | mutex_unlock(&cam->s_mutex); |
1468 | return ret; | |
1469 | } | |
1470 | ||
1471 | ||
1472 | ||
1473 | ||
1474 | ||
1475 | static int cafe_vidioc_querycap(struct file *file, void *priv, | |
1476 | struct v4l2_capability *cap) | |
1477 | { | |
1478 | strcpy(cap->driver, "cafe_ccic"); | |
1479 | strcpy(cap->card, "cafe_ccic"); | |
1480 | cap->version = CAFE_VERSION; | |
1481 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | | |
1482 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; | |
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | ||
1487 | /* | |
1488 | * The default format we use until somebody says otherwise. | |
1489 | */ | |
1490 | static struct v4l2_pix_format cafe_def_pix_format = { | |
1491 | .width = VGA_WIDTH, | |
1492 | .height = VGA_HEIGHT, | |
1493 | .pixelformat = V4L2_PIX_FMT_YUYV, | |
1494 | .field = V4L2_FIELD_NONE, | |
1495 | .bytesperline = VGA_WIDTH*2, | |
1496 | .sizeimage = VGA_WIDTH*VGA_HEIGHT*2, | |
1497 | }; | |
1498 | ||
78b526a4 | 1499 | static int cafe_vidioc_enum_fmt_vid_cap(struct file *filp, |
d905b382 JC |
1500 | void *priv, struct v4l2_fmtdesc *fmt) |
1501 | { | |
1502 | struct cafe_camera *cam = priv; | |
1503 | int ret; | |
1504 | ||
1505 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1506 | return -EINVAL; | |
1507 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1508 | ret = sensor_call(cam, video, enum_fmt, fmt); |
d905b382 JC |
1509 | mutex_unlock(&cam->s_mutex); |
1510 | return ret; | |
1511 | } | |
1512 | ||
1513 | ||
78b526a4 | 1514 | static int cafe_vidioc_try_fmt_vid_cap(struct file *filp, void *priv, |
d905b382 JC |
1515 | struct v4l2_format *fmt) |
1516 | { | |
1517 | struct cafe_camera *cam = priv; | |
1518 | int ret; | |
1519 | ||
1520 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1521 | ret = sensor_call(cam, video, try_fmt, fmt); |
d905b382 JC |
1522 | mutex_unlock(&cam->s_mutex); |
1523 | return ret; | |
1524 | } | |
1525 | ||
78b526a4 | 1526 | static int cafe_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, |
d905b382 JC |
1527 | struct v4l2_format *fmt) |
1528 | { | |
1529 | struct cafe_camera *cam = priv; | |
1530 | int ret; | |
1531 | ||
1532 | /* | |
1533 | * Can't do anything if the device is not idle | |
1534 | * Also can't if there are streaming buffers in place. | |
1535 | */ | |
1536 | if (cam->state != S_IDLE || cam->n_sbufs > 0) | |
1537 | return -EBUSY; | |
1538 | /* | |
1539 | * See if the formatting works in principle. | |
1540 | */ | |
78b526a4 | 1541 | ret = cafe_vidioc_try_fmt_vid_cap(filp, priv, fmt); |
d905b382 JC |
1542 | if (ret) |
1543 | return ret; | |
1544 | /* | |
1545 | * Now we start to change things for real, so let's do it | |
1546 | * under lock. | |
1547 | */ | |
1548 | mutex_lock(&cam->s_mutex); | |
1549 | cam->pix_format = fmt->fmt.pix; | |
1550 | /* | |
1551 | * Make sure we have appropriate DMA buffers. | |
1552 | */ | |
1553 | ret = -ENOMEM; | |
1554 | if (cam->nbufs > 0 && cam->dma_buf_size < cam->pix_format.sizeimage) | |
1555 | cafe_free_dma_bufs(cam); | |
1556 | if (cam->nbufs == 0) { | |
1557 | if (cafe_alloc_dma_bufs(cam, 0)) | |
1558 | goto out; | |
1559 | } | |
1560 | /* | |
1561 | * It looks like this might work, so let's program the sensor. | |
1562 | */ | |
1563 | ret = cafe_cam_configure(cam); | |
1564 | if (! ret) | |
1565 | ret = cafe_ctlr_configure(cam); | |
1566 | out: | |
1567 | mutex_unlock(&cam->s_mutex); | |
1568 | return ret; | |
1569 | } | |
1570 | ||
1571 | /* | |
1572 | * Return our stored notion of how the camera is/should be configured. | |
1573 | * The V4l2 spec wants us to be smarter, and actually get this from | |
1574 | * the camera (and not mess with it at open time). Someday. | |
1575 | */ | |
78b526a4 | 1576 | static int cafe_vidioc_g_fmt_vid_cap(struct file *filp, void *priv, |
d905b382 JC |
1577 | struct v4l2_format *f) |
1578 | { | |
1579 | struct cafe_camera *cam = priv; | |
1580 | ||
1581 | f->fmt.pix = cam->pix_format; | |
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * We only have one input - the sensor - so minimize the nonsense here. | |
1587 | */ | |
1588 | static int cafe_vidioc_enum_input(struct file *filp, void *priv, | |
1589 | struct v4l2_input *input) | |
1590 | { | |
1591 | if (input->index != 0) | |
1592 | return -EINVAL; | |
1593 | ||
1594 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1595 | input->std = V4L2_STD_ALL; /* Not sure what should go here */ | |
1596 | strcpy(input->name, "Camera"); | |
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | static int cafe_vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
1601 | { | |
1602 | *i = 0; | |
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | static int cafe_vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
1607 | { | |
1608 | if (i != 0) | |
1609 | return -EINVAL; | |
1610 | return 0; | |
1611 | } | |
1612 | ||
1613 | /* from vivi.c */ | |
e75f9cee | 1614 | static int cafe_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a) |
d905b382 JC |
1615 | { |
1616 | return 0; | |
1617 | } | |
1618 | ||
c8f5b2f5 JC |
1619 | /* |
1620 | * G/S_PARM. Most of this is done by the sensor, but we are | |
1621 | * the level which controls the number of read buffers. | |
1622 | */ | |
1623 | static int cafe_vidioc_g_parm(struct file *filp, void *priv, | |
1624 | struct v4l2_streamparm *parms) | |
1625 | { | |
1626 | struct cafe_camera *cam = priv; | |
1627 | int ret; | |
1628 | ||
1629 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1630 | ret = sensor_call(cam, video, g_parm, parms); |
c8f5b2f5 JC |
1631 | mutex_unlock(&cam->s_mutex); |
1632 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1633 | return ret; | |
1634 | } | |
1635 | ||
1636 | static int cafe_vidioc_s_parm(struct file *filp, void *priv, | |
1637 | struct v4l2_streamparm *parms) | |
1638 | { | |
1639 | struct cafe_camera *cam = priv; | |
1640 | int ret; | |
1641 | ||
1642 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1643 | ret = sensor_call(cam, video, s_parm, parms); |
c8f5b2f5 JC |
1644 | mutex_unlock(&cam->s_mutex); |
1645 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1646 | return ret; | |
1647 | } | |
1648 | ||
d905b382 JC |
1649 | /* |
1650 | * This template device holds all of those v4l2 methods; we | |
1651 | * clone it for specific real devices. | |
1652 | */ | |
1653 | ||
bec43661 | 1654 | static const struct v4l2_file_operations cafe_v4l_fops = { |
d905b382 JC |
1655 | .owner = THIS_MODULE, |
1656 | .open = cafe_v4l_open, | |
1657 | .release = cafe_v4l_release, | |
1658 | .read = cafe_v4l_read, | |
1659 | .poll = cafe_v4l_poll, | |
1660 | .mmap = cafe_v4l_mmap, | |
1661 | .ioctl = video_ioctl2, | |
d905b382 JC |
1662 | }; |
1663 | ||
a399810c | 1664 | static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = { |
d905b382 | 1665 | .vidioc_querycap = cafe_vidioc_querycap, |
78b526a4 HV |
1666 | .vidioc_enum_fmt_vid_cap = cafe_vidioc_enum_fmt_vid_cap, |
1667 | .vidioc_try_fmt_vid_cap = cafe_vidioc_try_fmt_vid_cap, | |
1668 | .vidioc_s_fmt_vid_cap = cafe_vidioc_s_fmt_vid_cap, | |
1669 | .vidioc_g_fmt_vid_cap = cafe_vidioc_g_fmt_vid_cap, | |
d905b382 JC |
1670 | .vidioc_enum_input = cafe_vidioc_enum_input, |
1671 | .vidioc_g_input = cafe_vidioc_g_input, | |
1672 | .vidioc_s_input = cafe_vidioc_s_input, | |
1673 | .vidioc_s_std = cafe_vidioc_s_std, | |
1674 | .vidioc_reqbufs = cafe_vidioc_reqbufs, | |
1675 | .vidioc_querybuf = cafe_vidioc_querybuf, | |
1676 | .vidioc_qbuf = cafe_vidioc_qbuf, | |
1677 | .vidioc_dqbuf = cafe_vidioc_dqbuf, | |
1678 | .vidioc_streamon = cafe_vidioc_streamon, | |
1679 | .vidioc_streamoff = cafe_vidioc_streamoff, | |
1680 | .vidioc_queryctrl = cafe_vidioc_queryctrl, | |
1681 | .vidioc_g_ctrl = cafe_vidioc_g_ctrl, | |
1682 | .vidioc_s_ctrl = cafe_vidioc_s_ctrl, | |
c8f5b2f5 JC |
1683 | .vidioc_g_parm = cafe_vidioc_g_parm, |
1684 | .vidioc_s_parm = cafe_vidioc_s_parm, | |
d905b382 JC |
1685 | }; |
1686 | ||
a399810c HV |
1687 | static struct video_device cafe_v4l_template = { |
1688 | .name = "cafe", | |
a399810c HV |
1689 | .minor = -1, /* Get one dynamically */ |
1690 | .tvnorms = V4L2_STD_NTSC_M, | |
1691 | .current_norm = V4L2_STD_NTSC_M, /* make mplayer happy */ | |
1692 | ||
1693 | .fops = &cafe_v4l_fops, | |
1694 | .ioctl_ops = &cafe_v4l_ioctl_ops, | |
21508b90 | 1695 | .release = video_device_release_empty, |
a399810c HV |
1696 | }; |
1697 | ||
d905b382 | 1698 | |
d905b382 JC |
1699 | /* ---------------------------------------------------------------------- */ |
1700 | /* | |
1701 | * Interrupt handler stuff | |
1702 | */ | |
1703 | ||
d905b382 JC |
1704 | |
1705 | ||
1706 | static void cafe_frame_tasklet(unsigned long data) | |
1707 | { | |
1708 | struct cafe_camera *cam = (struct cafe_camera *) data; | |
1709 | int i; | |
1710 | unsigned long flags; | |
1711 | struct cafe_sio_buffer *sbuf; | |
1712 | ||
1713 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1714 | for (i = 0; i < cam->nbufs; i++) { | |
1715 | int bufno = cam->next_buf; | |
1716 | if (bufno < 0) { /* "will never happen" */ | |
1717 | cam_err(cam, "No valid bufs in tasklet!\n"); | |
1718 | break; | |
1719 | } | |
1720 | if (++(cam->next_buf) >= cam->nbufs) | |
1721 | cam->next_buf = 0; | |
1722 | if (! test_bit(bufno, &cam->flags)) | |
1723 | continue; | |
1724 | if (list_empty(&cam->sb_avail)) | |
1725 | break; /* Leave it valid, hope for better later */ | |
1726 | clear_bit(bufno, &cam->flags); | |
d905b382 JC |
1727 | sbuf = list_entry(cam->sb_avail.next, |
1728 | struct cafe_sio_buffer, list); | |
5b50ed7c JC |
1729 | /* |
1730 | * Drop the lock during the big copy. This *should* be safe... | |
1731 | */ | |
1732 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
a66d2336 JC |
1733 | memcpy(sbuf->buffer, cam->dma_bufs[bufno], |
1734 | cam->pix_format.sizeimage); | |
d905b382 JC |
1735 | sbuf->v4lbuf.bytesused = cam->pix_format.sizeimage; |
1736 | sbuf->v4lbuf.sequence = cam->buf_seq[bufno]; | |
1737 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
1738 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE; | |
5b50ed7c | 1739 | spin_lock_irqsave(&cam->dev_lock, flags); |
d905b382 JC |
1740 | list_move_tail(&sbuf->list, &cam->sb_full); |
1741 | } | |
1742 | if (! list_empty(&cam->sb_full)) | |
1743 | wake_up(&cam->iowait); | |
1744 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1745 | } | |
1746 | ||
1747 | ||
1748 | ||
1749 | static void cafe_frame_complete(struct cafe_camera *cam, int frame) | |
1750 | { | |
1751 | /* | |
1752 | * Basic frame housekeeping. | |
1753 | */ | |
1754 | if (test_bit(frame, &cam->flags) && printk_ratelimit()) | |
1755 | cam_err(cam, "Frame overrun on %d, frames lost\n", frame); | |
1756 | set_bit(frame, &cam->flags); | |
1757 | clear_bit(CF_DMA_ACTIVE, &cam->flags); | |
1758 | if (cam->next_buf < 0) | |
1759 | cam->next_buf = frame; | |
1760 | cam->buf_seq[frame] = ++(cam->sequence); | |
1761 | ||
1762 | switch (cam->state) { | |
1763 | /* | |
1764 | * If in single read mode, try going speculative. | |
1765 | */ | |
1766 | case S_SINGLEREAD: | |
1767 | cam->state = S_SPECREAD; | |
1768 | cam->specframes = 0; | |
1769 | wake_up(&cam->iowait); | |
1770 | break; | |
1771 | ||
1772 | /* | |
1773 | * If we are already doing speculative reads, and nobody is | |
1774 | * reading them, just stop. | |
1775 | */ | |
1776 | case S_SPECREAD: | |
1777 | if (++(cam->specframes) >= cam->nbufs) { | |
1778 | cafe_ctlr_stop(cam); | |
1779 | cafe_ctlr_irq_disable(cam); | |
1780 | cam->state = S_IDLE; | |
1781 | } | |
1782 | wake_up(&cam->iowait); | |
1783 | break; | |
1784 | /* | |
1785 | * For the streaming case, we defer the real work to the | |
1786 | * camera tasklet. | |
1787 | * | |
1788 | * FIXME: if the application is not consuming the buffers, | |
1789 | * we should eventually put things on hold and restart in | |
1790 | * vidioc_dqbuf(). | |
1791 | */ | |
1792 | case S_STREAMING: | |
1793 | tasklet_schedule(&cam->s_tasklet); | |
1794 | break; | |
1795 | ||
1796 | default: | |
1797 | cam_err(cam, "Frame interrupt in non-operational state\n"); | |
1798 | break; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | ||
1803 | ||
1804 | ||
1805 | static void cafe_frame_irq(struct cafe_camera *cam, unsigned int irqs) | |
1806 | { | |
1807 | unsigned int frame; | |
1808 | ||
1809 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); /* Clear'em all */ | |
1810 | /* | |
1811 | * Handle any frame completions. There really should | |
1812 | * not be more than one of these, or we have fallen | |
1813 | * far behind. | |
1814 | */ | |
1815 | for (frame = 0; frame < cam->nbufs; frame++) | |
1816 | if (irqs & (IRQ_EOF0 << frame)) | |
1817 | cafe_frame_complete(cam, frame); | |
1818 | /* | |
1819 | * If a frame starts, note that we have DMA active. This | |
1820 | * code assumes that we won't get multiple frame interrupts | |
1821 | * at once; may want to rethink that. | |
1822 | */ | |
1823 | if (irqs & (IRQ_SOF0 | IRQ_SOF1 | IRQ_SOF2)) | |
1824 | set_bit(CF_DMA_ACTIVE, &cam->flags); | |
1825 | } | |
1826 | ||
1827 | ||
1828 | ||
1829 | static irqreturn_t cafe_irq(int irq, void *data) | |
1830 | { | |
1831 | struct cafe_camera *cam = data; | |
1832 | unsigned int irqs; | |
1833 | ||
1834 | spin_lock(&cam->dev_lock); | |
1835 | irqs = cafe_reg_read(cam, REG_IRQSTAT); | |
1836 | if ((irqs & ALLIRQS) == 0) { | |
1837 | spin_unlock(&cam->dev_lock); | |
1838 | return IRQ_NONE; | |
1839 | } | |
1840 | if (irqs & FRAMEIRQS) | |
1841 | cafe_frame_irq(cam, irqs); | |
1842 | if (irqs & TWSIIRQS) { | |
1843 | cafe_reg_write(cam, REG_IRQSTAT, TWSIIRQS); | |
1844 | wake_up(&cam->smbus_wait); | |
1845 | } | |
1846 | spin_unlock(&cam->dev_lock); | |
1847 | return IRQ_HANDLED; | |
1848 | } | |
1849 | ||
1850 | ||
1851 | /* -------------------------------------------------------------------------- */ | |
1852 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1853 | /* | |
1854 | * Debugfs stuff. | |
1855 | */ | |
1856 | ||
1857 | static char cafe_debug_buf[1024]; | |
1858 | static struct dentry *cafe_dfs_root; | |
1859 | ||
1860 | static void cafe_dfs_setup(void) | |
1861 | { | |
1862 | cafe_dfs_root = debugfs_create_dir("cafe_ccic", NULL); | |
1863 | if (IS_ERR(cafe_dfs_root)) { | |
1864 | cafe_dfs_root = NULL; /* Never mind */ | |
1865 | printk(KERN_NOTICE "cafe_ccic unable to set up debugfs\n"); | |
1866 | } | |
1867 | } | |
1868 | ||
1869 | static void cafe_dfs_shutdown(void) | |
1870 | { | |
1871 | if (cafe_dfs_root) | |
1872 | debugfs_remove(cafe_dfs_root); | |
1873 | } | |
1874 | ||
1875 | static int cafe_dfs_open(struct inode *inode, struct file *file) | |
1876 | { | |
1877 | file->private_data = inode->i_private; | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | static ssize_t cafe_dfs_read_regs(struct file *file, | |
1882 | char __user *buf, size_t count, loff_t *ppos) | |
1883 | { | |
1884 | struct cafe_camera *cam = file->private_data; | |
1885 | char *s = cafe_debug_buf; | |
1886 | int offset; | |
1887 | ||
1888 | for (offset = 0; offset < 0x44; offset += 4) | |
1889 | s += sprintf(s, "%02x: %08x\n", offset, | |
1890 | cafe_reg_read(cam, offset)); | |
1891 | for (offset = 0x88; offset <= 0x90; offset += 4) | |
1892 | s += sprintf(s, "%02x: %08x\n", offset, | |
1893 | cafe_reg_read(cam, offset)); | |
1894 | for (offset = 0xb4; offset <= 0xbc; offset += 4) | |
1895 | s += sprintf(s, "%02x: %08x\n", offset, | |
1896 | cafe_reg_read(cam, offset)); | |
1897 | for (offset = 0x3000; offset <= 0x300c; offset += 4) | |
1898 | s += sprintf(s, "%04x: %08x\n", offset, | |
1899 | cafe_reg_read(cam, offset)); | |
1900 | return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf, | |
1901 | s - cafe_debug_buf); | |
1902 | } | |
1903 | ||
fa027c2a | 1904 | static const struct file_operations cafe_dfs_reg_ops = { |
d905b382 JC |
1905 | .owner = THIS_MODULE, |
1906 | .read = cafe_dfs_read_regs, | |
1907 | .open = cafe_dfs_open | |
1908 | }; | |
1909 | ||
1910 | static ssize_t cafe_dfs_read_cam(struct file *file, | |
1911 | char __user *buf, size_t count, loff_t *ppos) | |
1912 | { | |
1913 | struct cafe_camera *cam = file->private_data; | |
1914 | char *s = cafe_debug_buf; | |
1915 | int offset; | |
1916 | ||
1917 | if (! cam->sensor) | |
1918 | return -EINVAL; | |
1919 | for (offset = 0x0; offset < 0x8a; offset++) | |
1920 | { | |
1921 | u8 v; | |
1922 | ||
8bcfd7af | 1923 | cafe_smbus_read_data(cam, cam->sensor_addr, offset, &v); |
d905b382 JC |
1924 | s += sprintf(s, "%02x: %02x\n", offset, v); |
1925 | } | |
1926 | return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf, | |
1927 | s - cafe_debug_buf); | |
1928 | } | |
1929 | ||
fa027c2a | 1930 | static const struct file_operations cafe_dfs_cam_ops = { |
d905b382 JC |
1931 | .owner = THIS_MODULE, |
1932 | .read = cafe_dfs_read_cam, | |
1933 | .open = cafe_dfs_open | |
1934 | }; | |
1935 | ||
1936 | ||
1937 | ||
1938 | static void cafe_dfs_cam_setup(struct cafe_camera *cam) | |
1939 | { | |
1940 | char fname[40]; | |
1941 | ||
1942 | if (!cafe_dfs_root) | |
1943 | return; | |
21508b90 | 1944 | sprintf(fname, "regs-%d", cam->vdev.num); |
d905b382 JC |
1945 | cam->dfs_regs = debugfs_create_file(fname, 0444, cafe_dfs_root, |
1946 | cam, &cafe_dfs_reg_ops); | |
21508b90 | 1947 | sprintf(fname, "cam-%d", cam->vdev.num); |
d905b382 JC |
1948 | cam->dfs_cam_regs = debugfs_create_file(fname, 0444, cafe_dfs_root, |
1949 | cam, &cafe_dfs_cam_ops); | |
1950 | } | |
1951 | ||
1952 | ||
1953 | static void cafe_dfs_cam_shutdown(struct cafe_camera *cam) | |
1954 | { | |
1955 | if (! IS_ERR(cam->dfs_regs)) | |
1956 | debugfs_remove(cam->dfs_regs); | |
1957 | if (! IS_ERR(cam->dfs_cam_regs)) | |
1958 | debugfs_remove(cam->dfs_cam_regs); | |
1959 | } | |
1960 | ||
1961 | #else | |
1962 | ||
1963 | #define cafe_dfs_setup() | |
1964 | #define cafe_dfs_shutdown() | |
1965 | #define cafe_dfs_cam_setup(cam) | |
1966 | #define cafe_dfs_cam_shutdown(cam) | |
1967 | #endif /* CONFIG_VIDEO_ADV_DEBUG */ | |
1968 | ||
1969 | ||
1970 | ||
1971 | ||
1972 | /* ------------------------------------------------------------------------*/ | |
1973 | /* | |
1974 | * PCI interface stuff. | |
1975 | */ | |
1976 | ||
1977 | static int cafe_pci_probe(struct pci_dev *pdev, | |
1978 | const struct pci_device_id *id) | |
1979 | { | |
1980 | int ret; | |
d905b382 | 1981 | struct cafe_camera *cam; |
aa7a7fb3 | 1982 | |
d905b382 JC |
1983 | /* |
1984 | * Start putting together one of our big camera structures. | |
1985 | */ | |
1986 | ret = -ENOMEM; | |
1987 | cam = kzalloc(sizeof(struct cafe_camera), GFP_KERNEL); | |
1988 | if (cam == NULL) | |
1989 | goto out; | |
21508b90 HV |
1990 | ret = v4l2_device_register(&pdev->dev, &cam->v4l2_dev); |
1991 | if (ret) | |
1992 | goto out_free; | |
1993 | ||
d905b382 JC |
1994 | mutex_init(&cam->s_mutex); |
1995 | mutex_lock(&cam->s_mutex); | |
1996 | spin_lock_init(&cam->dev_lock); | |
1997 | cam->state = S_NOTREADY; | |
1998 | cafe_set_config_needed(cam, 1); | |
1999 | init_waitqueue_head(&cam->smbus_wait); | |
2000 | init_waitqueue_head(&cam->iowait); | |
2001 | cam->pdev = pdev; | |
2002 | cam->pix_format = cafe_def_pix_format; | |
2003 | INIT_LIST_HEAD(&cam->dev_list); | |
2004 | INIT_LIST_HEAD(&cam->sb_avail); | |
2005 | INIT_LIST_HEAD(&cam->sb_full); | |
2006 | tasklet_init(&cam->s_tasklet, cafe_frame_tasklet, (unsigned long) cam); | |
2007 | /* | |
2008 | * Get set up on the PCI bus. | |
2009 | */ | |
2010 | ret = pci_enable_device(pdev); | |
2011 | if (ret) | |
21508b90 | 2012 | goto out_unreg; |
d905b382 JC |
2013 | pci_set_master(pdev); |
2014 | ||
2015 | ret = -EIO; | |
2016 | cam->regs = pci_iomap(pdev, 0, 0); | |
2017 | if (! cam->regs) { | |
2018 | printk(KERN_ERR "Unable to ioremap cafe-ccic regs\n"); | |
21508b90 | 2019 | goto out_unreg; |
d905b382 JC |
2020 | } |
2021 | ret = request_irq(pdev->irq, cafe_irq, IRQF_SHARED, "cafe-ccic", cam); | |
2022 | if (ret) | |
2023 | goto out_iounmap; | |
7acf90c7 JC |
2024 | /* |
2025 | * Initialize the controller and leave it powered up. It will | |
2026 | * stay that way until the sensor driver shows up. | |
2027 | */ | |
d905b382 JC |
2028 | cafe_ctlr_init(cam); |
2029 | cafe_ctlr_power_up(cam); | |
2030 | /* | |
7acf90c7 JC |
2031 | * Set up I2C/SMBUS communications. We have to drop the mutex here |
2032 | * because the sensor could attach in this call chain, leading to | |
2033 | * unsightly deadlocks. | |
d905b382 JC |
2034 | */ |
2035 | mutex_unlock(&cam->s_mutex); /* attach can deadlock */ | |
2036 | ret = cafe_smbus_setup(cam); | |
2037 | if (ret) | |
2038 | goto out_freeirq; | |
8bcfd7af HV |
2039 | |
2040 | cam->sensor_addr = 0x42; | |
2041 | cam->sensor = v4l2_i2c_new_subdev(&cam->i2c_adapter, | |
2042 | "ov7670", "ov7670", cam->sensor_addr); | |
2043 | if (cam->sensor == NULL) { | |
2044 | ret = -ENODEV; | |
2045 | goto out_smbus; | |
2046 | } | |
2047 | ret = cafe_cam_init(cam); | |
2048 | if (ret) | |
2049 | goto out_smbus; | |
2050 | ||
d905b382 JC |
2051 | /* |
2052 | * Get the v4l2 setup done. | |
2053 | */ | |
2054 | mutex_lock(&cam->s_mutex); | |
21508b90 HV |
2055 | cam->vdev = cafe_v4l_template; |
2056 | cam->vdev.debug = 0; | |
2057 | /* cam->vdev.debug = V4L2_DEBUG_IOCTL_ARG;*/ | |
2058 | cam->vdev.v4l2_dev = &cam->v4l2_dev; | |
2059 | ret = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1); | |
d905b382 JC |
2060 | if (ret) |
2061 | goto out_smbus; | |
21508b90 HV |
2062 | video_set_drvdata(&cam->vdev, cam); |
2063 | ||
d905b382 JC |
2064 | /* |
2065 | * If so requested, try to get our DMA buffers now. | |
2066 | */ | |
23869e23 | 2067 | if (!alloc_bufs_at_read) { |
d905b382 JC |
2068 | if (cafe_alloc_dma_bufs(cam, 1)) |
2069 | cam_warn(cam, "Unable to alloc DMA buffers at load" | |
2070 | " will try again later."); | |
2071 | } | |
2072 | ||
2073 | cafe_dfs_cam_setup(cam); | |
2074 | mutex_unlock(&cam->s_mutex); | |
d905b382 JC |
2075 | return 0; |
2076 | ||
21508b90 | 2077 | out_smbus: |
d905b382 | 2078 | cafe_smbus_shutdown(cam); |
21508b90 | 2079 | out_freeirq: |
d905b382 JC |
2080 | cafe_ctlr_power_down(cam); |
2081 | free_irq(pdev->irq, cam); | |
21508b90 | 2082 | out_iounmap: |
d905b382 | 2083 | pci_iounmap(pdev, cam->regs); |
21508b90 HV |
2084 | out_free: |
2085 | v4l2_device_unregister(&cam->v4l2_dev); | |
2086 | out_unreg: | |
d905b382 | 2087 | kfree(cam); |
21508b90 | 2088 | out: |
d905b382 JC |
2089 | return ret; |
2090 | } | |
2091 | ||
2092 | ||
2093 | /* | |
2094 | * Shut down an initialized device | |
2095 | */ | |
2096 | static void cafe_shutdown(struct cafe_camera *cam) | |
2097 | { | |
2098 | /* FIXME: Make sure we take care of everything here */ | |
2099 | cafe_dfs_cam_shutdown(cam); | |
2100 | if (cam->n_sbufs > 0) | |
2101 | /* What if they are still mapped? Shouldn't be, but... */ | |
2102 | cafe_free_sio_buffers(cam); | |
d905b382 JC |
2103 | cafe_ctlr_stop_dma(cam); |
2104 | cafe_ctlr_power_down(cam); | |
2105 | cafe_smbus_shutdown(cam); | |
2106 | cafe_free_dma_bufs(cam); | |
2107 | free_irq(cam->pdev->irq, cam); | |
2108 | pci_iounmap(cam->pdev, cam->regs); | |
21508b90 | 2109 | video_unregister_device(&cam->vdev); |
d905b382 JC |
2110 | } |
2111 | ||
2112 | ||
2113 | static void cafe_pci_remove(struct pci_dev *pdev) | |
2114 | { | |
21508b90 HV |
2115 | struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev); |
2116 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
d905b382 JC |
2117 | |
2118 | if (cam == NULL) { | |
d4f60baf | 2119 | printk(KERN_WARNING "pci_remove on unknown pdev %p\n", pdev); |
d905b382 JC |
2120 | return; |
2121 | } | |
2122 | mutex_lock(&cam->s_mutex); | |
2123 | if (cam->users > 0) | |
2124 | cam_warn(cam, "Removing a device with users!\n"); | |
2125 | cafe_shutdown(cam); | |
21508b90 HV |
2126 | v4l2_device_unregister(&cam->v4l2_dev); |
2127 | kfree(cam); | |
d905b382 JC |
2128 | /* No unlock - it no longer exists */ |
2129 | } | |
2130 | ||
2131 | ||
ff68defa JC |
2132 | #ifdef CONFIG_PM |
2133 | /* | |
2134 | * Basic power management. | |
2135 | */ | |
2136 | static int cafe_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2137 | { | |
21508b90 HV |
2138 | struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev); |
2139 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
ff68defa | 2140 | int ret; |
c3034497 | 2141 | enum cafe_state cstate; |
ff68defa JC |
2142 | |
2143 | ret = pci_save_state(pdev); | |
2144 | if (ret) | |
2145 | return ret; | |
c3034497 | 2146 | cstate = cam->state; /* HACK - stop_dma sets to idle */ |
ff68defa JC |
2147 | cafe_ctlr_stop_dma(cam); |
2148 | cafe_ctlr_power_down(cam); | |
2149 | pci_disable_device(pdev); | |
c3034497 | 2150 | cam->state = cstate; |
ff68defa JC |
2151 | return 0; |
2152 | } | |
2153 | ||
2154 | ||
2155 | static int cafe_pci_resume(struct pci_dev *pdev) | |
2156 | { | |
21508b90 HV |
2157 | struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev); |
2158 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
ff68defa JC |
2159 | int ret = 0; |
2160 | ||
2161 | ret = pci_restore_state(pdev); | |
2162 | if (ret) | |
2163 | return ret; | |
12df2f54 | 2164 | ret = pci_enable_device(pdev); |
01659f2a | 2165 | |
12df2f54 TP |
2166 | if (ret) { |
2167 | cam_warn(cam, "Unable to re-enable device on resume!\n"); | |
2168 | return ret; | |
2169 | } | |
ff68defa | 2170 | cafe_ctlr_init(cam); |
01659f2a CB |
2171 | cafe_ctlr_power_down(cam); |
2172 | ||
2173 | mutex_lock(&cam->s_mutex); | |
2174 | if (cam->users > 0) { | |
2175 | cafe_ctlr_power_up(cam); | |
2176 | __cafe_cam_reset(cam); | |
2177 | } | |
2178 | mutex_unlock(&cam->s_mutex); | |
2179 | ||
ff68defa JC |
2180 | set_bit(CF_CONFIG_NEEDED, &cam->flags); |
2181 | if (cam->state == S_SPECREAD) | |
2182 | cam->state = S_IDLE; /* Don't bother restarting */ | |
2183 | else if (cam->state == S_SINGLEREAD || cam->state == S_STREAMING) | |
2184 | ret = cafe_read_setup(cam, cam->state); | |
2185 | return ret; | |
2186 | } | |
2187 | ||
2188 | #endif /* CONFIG_PM */ | |
d905b382 JC |
2189 | |
2190 | ||
2191 | static struct pci_device_id cafe_ids[] = { | |
aa7a7fb3 DW |
2192 | { PCI_DEVICE(PCI_VENDOR_ID_MARVELL, |
2193 | PCI_DEVICE_ID_MARVELL_88ALP01_CCIC) }, | |
d905b382 JC |
2194 | { 0, } |
2195 | }; | |
2196 | ||
2197 | MODULE_DEVICE_TABLE(pci, cafe_ids); | |
2198 | ||
2199 | static struct pci_driver cafe_pci_driver = { | |
2200 | .name = "cafe1000-ccic", | |
2201 | .id_table = cafe_ids, | |
2202 | .probe = cafe_pci_probe, | |
2203 | .remove = cafe_pci_remove, | |
ff68defa JC |
2204 | #ifdef CONFIG_PM |
2205 | .suspend = cafe_pci_suspend, | |
2206 | .resume = cafe_pci_resume, | |
2207 | #endif | |
d905b382 JC |
2208 | }; |
2209 | ||
2210 | ||
2211 | ||
2212 | ||
2213 | static int __init cafe_init(void) | |
2214 | { | |
2215 | int ret; | |
2216 | ||
2217 | printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n", | |
2218 | CAFE_VERSION); | |
2219 | cafe_dfs_setup(); | |
2220 | ret = pci_register_driver(&cafe_pci_driver); | |
2221 | if (ret) { | |
2222 | printk(KERN_ERR "Unable to register cafe_ccic driver\n"); | |
2223 | goto out; | |
2224 | } | |
d905b382 JC |
2225 | ret = 0; |
2226 | ||
2227 | out: | |
2228 | return ret; | |
2229 | } | |
2230 | ||
2231 | ||
2232 | static void __exit cafe_exit(void) | |
2233 | { | |
2234 | pci_unregister_driver(&cafe_pci_driver); | |
2235 | cafe_dfs_shutdown(); | |
2236 | } | |
2237 | ||
2238 | module_init(cafe_init); | |
2239 | module_exit(cafe_exit); |