Commit | Line | Data |
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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 | * | |
acc5d851 HV |
14 | * v4l2_device/v4l2_subdev conversion by: |
15 | * Copyright (C) 2009 Hans Verkuil <hverkuil@xs4all.nl> | |
16 | * | |
17 | * Note: this conversion is untested! Please contact the linux-media | |
18 | * mailinglist if you can test this, together with the test results. | |
19 | * | |
d905b382 JC |
20 | * This file may be distributed under the terms of the GNU General |
21 | * Public License, version 2. | |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/module.h> | |
d905b382 JC |
26 | #include <linux/init.h> |
27 | #include <linux/fs.h> | |
ec16d020 | 28 | #include <linux/mm.h> |
d905b382 JC |
29 | #include <linux/pci.h> |
30 | #include <linux/i2c.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/videodev2.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
21508b90 | 35 | #include <media/v4l2-device.h> |
35ea11ff | 36 | #include <media/v4l2-ioctl.h> |
3434eb7e | 37 | #include <media/v4l2-chip-ident.h> |
d905b382 JC |
38 | #include <linux/device.h> |
39 | #include <linux/wait.h> | |
40 | #include <linux/list.h> | |
41 | #include <linux/dma-mapping.h> | |
42 | #include <linux/delay.h> | |
d905b382 JC |
43 | #include <linux/jiffies.h> |
44 | #include <linux/vmalloc.h> | |
45 | ||
46 | #include <asm/uaccess.h> | |
47 | #include <asm/io.h> | |
48 | ||
49 | #include "cafe_ccic-regs.h" | |
50 | ||
ff68defa | 51 | #define CAFE_VERSION 0x000002 |
d905b382 JC |
52 | |
53 | ||
54 | /* | |
55 | * Parameters. | |
56 | */ | |
57 | MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>"); | |
58 | MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver"); | |
59 | MODULE_LICENSE("GPL"); | |
60 | MODULE_SUPPORTED_DEVICE("Video"); | |
61 | ||
62 | /* | |
63 | * Internal DMA buffer management. Since the controller cannot do S/G I/O, | |
64 | * we must have physically contiguous buffers to bring frames into. | |
65 | * These parameters control how many buffers we use, whether we | |
66 | * allocate them at load time (better chance of success, but nails down | |
67 | * memory) or when somebody tries to use the camera (riskier), and, | |
68 | * for load-time allocation, how big they should be. | |
69 | * | |
70 | * The controller can cycle through three buffers. We could use | |
71 | * more by flipping pointers around, but it probably makes little | |
72 | * sense. | |
73 | */ | |
74 | ||
75 | #define MAX_DMA_BUFS 3 | |
ff699e6b | 76 | static int alloc_bufs_at_read; |
23869e23 AS |
77 | module_param(alloc_bufs_at_read, bool, 0444); |
78 | MODULE_PARM_DESC(alloc_bufs_at_read, | |
79 | "Non-zero value causes DMA buffers to be allocated when the " | |
80 | "video capture device is read, rather than at module load " | |
81 | "time. This saves memory, but decreases the chances of " | |
82 | "successfully getting those buffers."); | |
d905b382 JC |
83 | |
84 | static int n_dma_bufs = 3; | |
85 | module_param(n_dma_bufs, uint, 0644); | |
86 | MODULE_PARM_DESC(n_dma_bufs, | |
87 | "The number of DMA buffers to allocate. Can be either two " | |
88 | "(saves memory, makes timing tighter) or three."); | |
89 | ||
90 | static int dma_buf_size = VGA_WIDTH * VGA_HEIGHT * 2; /* Worst case */ | |
91 | module_param(dma_buf_size, uint, 0444); | |
92 | MODULE_PARM_DESC(dma_buf_size, | |
93 | "The size of the allocated DMA buffers. If actual operating " | |
94 | "parameters require larger buffers, an attempt to reallocate " | |
95 | "will be made."); | |
96 | ||
97 | static int min_buffers = 1; | |
98 | module_param(min_buffers, uint, 0644); | |
99 | MODULE_PARM_DESC(min_buffers, | |
100 | "The minimum number of streaming I/O buffers we are willing " | |
101 | "to work with."); | |
102 | ||
103 | static int max_buffers = 10; | |
104 | module_param(max_buffers, uint, 0644); | |
105 | MODULE_PARM_DESC(max_buffers, | |
106 | "The maximum number of streaming I/O buffers an application " | |
107 | "will be allowed to allocate. These buffers are big and live " | |
108 | "in vmalloc space."); | |
109 | ||
ff699e6b | 110 | static int flip; |
d905b382 JC |
111 | module_param(flip, bool, 0444); |
112 | MODULE_PARM_DESC(flip, | |
113 | "If set, the sensor will be instructed to flip the image " | |
114 | "vertically."); | |
115 | ||
116 | ||
117 | enum cafe_state { | |
118 | S_NOTREADY, /* Not yet initialized */ | |
119 | S_IDLE, /* Just hanging around */ | |
120 | S_FLAKED, /* Some sort of problem */ | |
121 | S_SINGLEREAD, /* In read() */ | |
122 | S_SPECREAD, /* Speculative read (for future read()) */ | |
123 | S_STREAMING /* Streaming data */ | |
124 | }; | |
125 | ||
126 | /* | |
127 | * Tracking of streaming I/O buffers. | |
128 | */ | |
129 | struct cafe_sio_buffer { | |
130 | struct list_head list; | |
131 | struct v4l2_buffer v4lbuf; | |
132 | char *buffer; /* Where it lives in kernel space */ | |
133 | int mapcount; | |
134 | struct cafe_camera *cam; | |
135 | }; | |
136 | ||
137 | /* | |
138 | * A description of one of our devices. | |
139 | * Locking: controlled by s_mutex. Certain fields, however, require | |
140 | * the dev_lock spinlock; they are marked as such by comments. | |
141 | * dev_lock is also required for access to device registers. | |
142 | */ | |
143 | struct cafe_camera | |
144 | { | |
21508b90 | 145 | struct v4l2_device v4l2_dev; |
d905b382 JC |
146 | enum cafe_state state; |
147 | unsigned long flags; /* Buffer status, mainly (dev_lock) */ | |
148 | int users; /* How many open FDs */ | |
149 | struct file *owner; /* Who has data access (v4l2) */ | |
150 | ||
151 | /* | |
152 | * Subsystem structures. | |
153 | */ | |
154 | struct pci_dev *pdev; | |
21508b90 | 155 | struct video_device vdev; |
d905b382 | 156 | struct i2c_adapter i2c_adapter; |
8bcfd7af HV |
157 | struct v4l2_subdev *sensor; |
158 | unsigned short sensor_addr; | |
d905b382 JC |
159 | |
160 | unsigned char __iomem *regs; | |
161 | struct list_head dev_list; /* link to other devices */ | |
162 | ||
163 | /* DMA buffers */ | |
164 | unsigned int nbufs; /* How many are alloc'd */ | |
165 | int next_buf; /* Next to consume (dev_lock) */ | |
166 | unsigned int dma_buf_size; /* allocated size */ | |
167 | void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */ | |
168 | dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */ | |
169 | unsigned int specframes; /* Unconsumed spec frames (dev_lock) */ | |
170 | unsigned int sequence; /* Frame sequence number */ | |
171 | unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual buffers */ | |
172 | ||
173 | /* Streaming buffers */ | |
174 | unsigned int n_sbufs; /* How many we have */ | |
175 | struct cafe_sio_buffer *sb_bufs; /* The array of housekeeping structs */ | |
176 | struct list_head sb_avail; /* Available for data (we own) (dev_lock) */ | |
177 | struct list_head sb_full; /* With data (user space owns) (dev_lock) */ | |
178 | struct tasklet_struct s_tasklet; | |
179 | ||
180 | /* Current operating parameters */ | |
3434eb7e | 181 | u32 sensor_type; /* Currently ov7670 only */ |
d905b382 | 182 | struct v4l2_pix_format pix_format; |
1e426228 | 183 | enum v4l2_mbus_pixelcode mbus_code; |
d905b382 JC |
184 | |
185 | /* Locks */ | |
186 | struct mutex s_mutex; /* Access to this structure */ | |
187 | spinlock_t dev_lock; /* Access to device */ | |
188 | ||
189 | /* Misc */ | |
190 | wait_queue_head_t smbus_wait; /* Waiting on i2c events */ | |
191 | wait_queue_head_t iowait; /* Waiting on frame data */ | |
d905b382 JC |
192 | }; |
193 | ||
194 | /* | |
195 | * Status flags. Always manipulated with bit operations. | |
196 | */ | |
197 | #define CF_BUF0_VALID 0 /* Buffers valid - first three */ | |
198 | #define CF_BUF1_VALID 1 | |
199 | #define CF_BUF2_VALID 2 | |
200 | #define CF_DMA_ACTIVE 3 /* A frame is incoming */ | |
201 | #define CF_CONFIG_NEEDED 4 /* Must configure hardware */ | |
202 | ||
8bcfd7af HV |
203 | #define sensor_call(cam, o, f, args...) \ |
204 | v4l2_subdev_call(cam->sensor, o, f, ##args) | |
d905b382 | 205 | |
21508b90 HV |
206 | static inline struct cafe_camera *to_cam(struct v4l2_device *dev) |
207 | { | |
208 | return container_of(dev, struct cafe_camera, v4l2_dev); | |
209 | } | |
210 | ||
1e426228 HV |
211 | static struct cafe_format_struct { |
212 | __u8 *desc; | |
213 | __u32 pixelformat; | |
214 | int bpp; /* Bytes per pixel */ | |
215 | enum v4l2_mbus_pixelcode mbus_code; | |
216 | } cafe_formats[] = { | |
217 | { | |
218 | .desc = "YUYV 4:2:2", | |
219 | .pixelformat = V4L2_PIX_FMT_YUYV, | |
220 | .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8, | |
221 | .bpp = 2, | |
222 | }, | |
223 | { | |
224 | .desc = "RGB 444", | |
225 | .pixelformat = V4L2_PIX_FMT_RGB444, | |
226 | .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE, | |
227 | .bpp = 2, | |
228 | }, | |
229 | { | |
230 | .desc = "RGB 565", | |
231 | .pixelformat = V4L2_PIX_FMT_RGB565, | |
232 | .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE, | |
233 | .bpp = 2, | |
234 | }, | |
235 | { | |
236 | .desc = "Raw RGB Bayer", | |
237 | .pixelformat = V4L2_PIX_FMT_SBGGR8, | |
238 | .mbus_code = V4L2_MBUS_FMT_SBGGR8_1X8, | |
239 | .bpp = 1 | |
240 | }, | |
241 | }; | |
242 | #define N_CAFE_FMTS ARRAY_SIZE(cafe_formats) | |
243 | ||
244 | static struct cafe_format_struct *cafe_find_format(u32 pixelformat) | |
245 | { | |
246 | unsigned i; | |
247 | ||
248 | for (i = 0; i < N_CAFE_FMTS; i++) | |
249 | if (cafe_formats[i].pixelformat == pixelformat) | |
250 | return cafe_formats + i; | |
251 | /* Not found? Then return the first format. */ | |
252 | return cafe_formats; | |
253 | } | |
d905b382 JC |
254 | |
255 | /* | |
256 | * Start over with DMA buffers - dev_lock needed. | |
257 | */ | |
258 | static void cafe_reset_buffers(struct cafe_camera *cam) | |
259 | { | |
260 | int i; | |
261 | ||
262 | cam->next_buf = -1; | |
263 | for (i = 0; i < cam->nbufs; i++) | |
264 | clear_bit(i, &cam->flags); | |
265 | cam->specframes = 0; | |
266 | } | |
267 | ||
268 | static inline int cafe_needs_config(struct cafe_camera *cam) | |
269 | { | |
270 | return test_bit(CF_CONFIG_NEEDED, &cam->flags); | |
271 | } | |
272 | ||
273 | static void cafe_set_config_needed(struct cafe_camera *cam, int needed) | |
274 | { | |
275 | if (needed) | |
276 | set_bit(CF_CONFIG_NEEDED, &cam->flags); | |
277 | else | |
278 | clear_bit(CF_CONFIG_NEEDED, &cam->flags); | |
279 | } | |
280 | ||
281 | ||
282 | ||
283 | ||
284 | /* | |
285 | * Debugging and related. | |
286 | */ | |
287 | #define cam_err(cam, fmt, arg...) \ | |
288 | dev_err(&(cam)->pdev->dev, fmt, ##arg); | |
289 | #define cam_warn(cam, fmt, arg...) \ | |
290 | dev_warn(&(cam)->pdev->dev, fmt, ##arg); | |
291 | #define cam_dbg(cam, fmt, arg...) \ | |
292 | dev_dbg(&(cam)->pdev->dev, fmt, ##arg); | |
293 | ||
294 | ||
295 | /* ---------------------------------------------------------------------*/ | |
d905b382 | 296 | |
d905b382 JC |
297 | /* |
298 | * Device register I/O | |
299 | */ | |
300 | static inline void cafe_reg_write(struct cafe_camera *cam, unsigned int reg, | |
301 | unsigned int val) | |
302 | { | |
303 | iowrite32(val, cam->regs + reg); | |
304 | } | |
305 | ||
306 | static inline unsigned int cafe_reg_read(struct cafe_camera *cam, | |
307 | unsigned int reg) | |
308 | { | |
309 | return ioread32(cam->regs + reg); | |
310 | } | |
311 | ||
312 | ||
313 | static inline void cafe_reg_write_mask(struct cafe_camera *cam, unsigned int reg, | |
314 | unsigned int val, unsigned int mask) | |
315 | { | |
316 | unsigned int v = cafe_reg_read(cam, reg); | |
317 | ||
318 | v = (v & ~mask) | (val & mask); | |
319 | cafe_reg_write(cam, reg, v); | |
320 | } | |
321 | ||
322 | static inline void cafe_reg_clear_bit(struct cafe_camera *cam, | |
323 | unsigned int reg, unsigned int val) | |
324 | { | |
325 | cafe_reg_write_mask(cam, reg, 0, val); | |
326 | } | |
327 | ||
328 | static inline void cafe_reg_set_bit(struct cafe_camera *cam, | |
329 | unsigned int reg, unsigned int val) | |
330 | { | |
331 | cafe_reg_write_mask(cam, reg, val, val); | |
332 | } | |
333 | ||
334 | ||
335 | ||
336 | /* -------------------------------------------------------------------- */ | |
337 | /* | |
338 | * The I2C/SMBUS interface to the camera itself starts here. The | |
339 | * controller handles SMBUS itself, presenting a relatively simple register | |
340 | * interface; all we have to do is to tell it where to route the data. | |
341 | */ | |
342 | #define CAFE_SMBUS_TIMEOUT (HZ) /* generous */ | |
343 | ||
344 | static int cafe_smbus_write_done(struct cafe_camera *cam) | |
345 | { | |
346 | unsigned long flags; | |
347 | int c1; | |
348 | ||
349 | /* | |
350 | * We must delay after the interrupt, or the controller gets confused | |
351 | * and never does give us good status. Fortunately, we don't do this | |
352 | * often. | |
353 | */ | |
354 | udelay(20); | |
355 | spin_lock_irqsave(&cam->dev_lock, flags); | |
356 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
357 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
358 | return (c1 & (TWSIC1_WSTAT|TWSIC1_ERROR)) != TWSIC1_WSTAT; | |
359 | } | |
360 | ||
361 | static int cafe_smbus_write_data(struct cafe_camera *cam, | |
362 | u16 addr, u8 command, u8 value) | |
363 | { | |
364 | unsigned int rval; | |
365 | unsigned long flags; | |
366 | ||
367 | spin_lock_irqsave(&cam->dev_lock, flags); | |
368 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
369 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
370 | /* | |
371 | * Marvell sez set clkdiv to all 1's for now. | |
372 | */ | |
373 | rval |= TWSIC0_CLKDIV; | |
374 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
375 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
376 | rval = value | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
377 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
378 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
d905b382 | 379 | |
df2b9b0f DD |
380 | /* Unfortunately, reading TWSIC1 too soon after sending a command |
381 | * causes the device to die. | |
382 | * Use a busy-wait because we often send a large quantity of small | |
383 | * commands at-once; using msleep() would cause a lot of context | |
384 | * switches which take longer than 2ms, resulting in a noticable | |
385 | * boot-time and capture-start delays. | |
386 | */ | |
387 | mdelay(2); | |
388 | ||
6d77444a | 389 | /* |
df2b9b0f DD |
390 | * Another sad fact is that sometimes, commands silently complete but |
391 | * cafe_smbus_write_done() never becomes aware of this. | |
392 | * This happens at random and appears to possible occur with any | |
393 | * command. | |
394 | * We don't understand why this is. We work around this issue | |
395 | * with the timeout in the wait below, assuming that all commands | |
396 | * complete within the timeout. | |
6d77444a | 397 | */ |
d905b382 JC |
398 | wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(cam), |
399 | CAFE_SMBUS_TIMEOUT); | |
df2b9b0f | 400 | |
d905b382 JC |
401 | spin_lock_irqsave(&cam->dev_lock, flags); |
402 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
403 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
404 | ||
405 | if (rval & TWSIC1_WSTAT) { | |
406 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) timed out\n", addr, | |
407 | command, value); | |
408 | return -EIO; | |
409 | } | |
410 | if (rval & TWSIC1_ERROR) { | |
411 | cam_err(cam, "SMBUS write (%02x/%02x/%02x) error\n", addr, | |
412 | command, value); | |
413 | return -EIO; | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
418 | ||
419 | ||
420 | static int cafe_smbus_read_done(struct cafe_camera *cam) | |
421 | { | |
422 | unsigned long flags; | |
423 | int c1; | |
424 | ||
425 | /* | |
426 | * We must delay after the interrupt, or the controller gets confused | |
427 | * and never does give us good status. Fortunately, we don't do this | |
428 | * often. | |
429 | */ | |
430 | udelay(20); | |
431 | spin_lock_irqsave(&cam->dev_lock, flags); | |
432 | c1 = cafe_reg_read(cam, REG_TWSIC1); | |
433 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
434 | return c1 & (TWSIC1_RVALID|TWSIC1_ERROR); | |
435 | } | |
436 | ||
437 | ||
438 | ||
439 | static int cafe_smbus_read_data(struct cafe_camera *cam, | |
440 | u16 addr, u8 command, u8 *value) | |
441 | { | |
442 | unsigned int rval; | |
443 | unsigned long flags; | |
444 | ||
445 | spin_lock_irqsave(&cam->dev_lock, flags); | |
446 | rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); | |
447 | rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */ | |
448 | /* | |
449 | * Marvel sez set clkdiv to all 1's for now. | |
450 | */ | |
451 | rval |= TWSIC0_CLKDIV; | |
452 | cafe_reg_write(cam, REG_TWSIC0, rval); | |
453 | (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */ | |
454 | rval = TWSIC1_READ | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR); | |
455 | cafe_reg_write(cam, REG_TWSIC1, rval); | |
456 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
457 | ||
458 | wait_event_timeout(cam->smbus_wait, | |
459 | cafe_smbus_read_done(cam), CAFE_SMBUS_TIMEOUT); | |
460 | spin_lock_irqsave(&cam->dev_lock, flags); | |
461 | rval = cafe_reg_read(cam, REG_TWSIC1); | |
462 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
463 | ||
464 | if (rval & TWSIC1_ERROR) { | |
465 | cam_err(cam, "SMBUS read (%02x/%02x) error\n", addr, command); | |
466 | return -EIO; | |
467 | } | |
468 | if (! (rval & TWSIC1_RVALID)) { | |
469 | cam_err(cam, "SMBUS read (%02x/%02x) timed out\n", addr, | |
470 | command); | |
471 | return -EIO; | |
472 | } | |
473 | *value = rval & 0xff; | |
474 | return 0; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Perform a transfer over SMBUS. This thing is called under | |
479 | * the i2c bus lock, so we shouldn't race with ourselves... | |
480 | */ | |
481 | static int cafe_smbus_xfer(struct i2c_adapter *adapter, u16 addr, | |
482 | unsigned short flags, char rw, u8 command, | |
483 | int size, union i2c_smbus_data *data) | |
484 | { | |
21508b90 HV |
485 | struct v4l2_device *v4l2_dev = i2c_get_adapdata(adapter); |
486 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
d905b382 JC |
487 | int ret = -EINVAL; |
488 | ||
d905b382 JC |
489 | /* |
490 | * This interface would appear to only do byte data ops. OK | |
491 | * it can do word too, but the cam chip has no use for that. | |
492 | */ | |
493 | if (size != I2C_SMBUS_BYTE_DATA) { | |
494 | cam_err(cam, "funky xfer size %d\n", size); | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | if (rw == I2C_SMBUS_WRITE) | |
499 | ret = cafe_smbus_write_data(cam, addr, command, data->byte); | |
500 | else if (rw == I2C_SMBUS_READ) | |
501 | ret = cafe_smbus_read_data(cam, addr, command, &data->byte); | |
502 | return ret; | |
503 | } | |
504 | ||
505 | ||
506 | static void cafe_smbus_enable_irq(struct cafe_camera *cam) | |
507 | { | |
508 | unsigned long flags; | |
509 | ||
510 | spin_lock_irqsave(&cam->dev_lock, flags); | |
511 | cafe_reg_set_bit(cam, REG_IRQMASK, TWSIIRQS); | |
512 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
513 | } | |
514 | ||
515 | static u32 cafe_smbus_func(struct i2c_adapter *adapter) | |
516 | { | |
517 | return I2C_FUNC_SMBUS_READ_BYTE_DATA | | |
518 | I2C_FUNC_SMBUS_WRITE_BYTE_DATA; | |
519 | } | |
520 | ||
521 | static struct i2c_algorithm cafe_smbus_algo = { | |
522 | .smbus_xfer = cafe_smbus_xfer, | |
523 | .functionality = cafe_smbus_func | |
524 | }; | |
525 | ||
526 | /* Somebody is on the bus */ | |
f9a76156 JC |
527 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam); |
528 | static void cafe_ctlr_power_down(struct cafe_camera *cam); | |
d905b382 | 529 | |
d905b382 JC |
530 | static int cafe_smbus_setup(struct cafe_camera *cam) |
531 | { | |
532 | struct i2c_adapter *adap = &cam->i2c_adapter; | |
533 | int ret; | |
534 | ||
535 | cafe_smbus_enable_irq(cam); | |
d905b382 | 536 | adap->owner = THIS_MODULE; |
d905b382 JC |
537 | adap->algo = &cafe_smbus_algo; |
538 | strcpy(adap->name, "cafe_ccic"); | |
12a917f6 | 539 | adap->dev.parent = &cam->pdev->dev; |
21508b90 | 540 | i2c_set_adapdata(adap, &cam->v4l2_dev); |
d905b382 JC |
541 | ret = i2c_add_adapter(adap); |
542 | if (ret) | |
543 | printk(KERN_ERR "Unable to register cafe i2c adapter\n"); | |
544 | return ret; | |
545 | } | |
546 | ||
547 | static void cafe_smbus_shutdown(struct cafe_camera *cam) | |
548 | { | |
549 | i2c_del_adapter(&cam->i2c_adapter); | |
550 | } | |
551 | ||
552 | ||
553 | /* ------------------------------------------------------------------- */ | |
554 | /* | |
555 | * Deal with the controller. | |
556 | */ | |
557 | ||
558 | /* | |
559 | * Do everything we think we need to have the interface operating | |
560 | * according to the desired format. | |
561 | */ | |
562 | static void cafe_ctlr_dma(struct cafe_camera *cam) | |
563 | { | |
564 | /* | |
565 | * Store the first two Y buffers (we aren't supporting | |
566 | * planar formats for now, so no UV bufs). Then either | |
567 | * set the third if it exists, or tell the controller | |
568 | * to just use two. | |
569 | */ | |
570 | cafe_reg_write(cam, REG_Y0BAR, cam->dma_handles[0]); | |
571 | cafe_reg_write(cam, REG_Y1BAR, cam->dma_handles[1]); | |
572 | if (cam->nbufs > 2) { | |
573 | cafe_reg_write(cam, REG_Y2BAR, cam->dma_handles[2]); | |
574 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
575 | } | |
576 | else | |
577 | cafe_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS); | |
578 | cafe_reg_write(cam, REG_UBAR, 0); /* 32 bits only for now */ | |
579 | } | |
580 | ||
581 | static void cafe_ctlr_image(struct cafe_camera *cam) | |
582 | { | |
583 | int imgsz; | |
584 | struct v4l2_pix_format *fmt = &cam->pix_format; | |
585 | ||
586 | imgsz = ((fmt->height << IMGSZ_V_SHIFT) & IMGSZ_V_MASK) | | |
587 | (fmt->bytesperline & IMGSZ_H_MASK); | |
588 | cafe_reg_write(cam, REG_IMGSIZE, imgsz); | |
589 | cafe_reg_write(cam, REG_IMGOFFSET, 0); | |
590 | /* YPITCH just drops the last two bits */ | |
591 | cafe_reg_write_mask(cam, REG_IMGPITCH, fmt->bytesperline, | |
592 | IMGP_YP_MASK); | |
593 | /* | |
594 | * Tell the controller about the image format we are using. | |
595 | */ | |
596 | switch (cam->pix_format.pixelformat) { | |
597 | case V4L2_PIX_FMT_YUYV: | |
598 | cafe_reg_write_mask(cam, REG_CTRL0, | |
599 | C0_DF_YUV|C0_YUV_PACKED|C0_YUVE_YUYV, | |
600 | C0_DF_MASK); | |
601 | break; | |
602 | ||
d905b382 JC |
603 | case V4L2_PIX_FMT_RGB444: |
604 | cafe_reg_write_mask(cam, REG_CTRL0, | |
605 | C0_DF_RGB|C0_RGBF_444|C0_RGB4_XRGB, | |
606 | C0_DF_MASK); | |
607 | /* Alpha value? */ | |
608 | break; | |
609 | ||
610 | case V4L2_PIX_FMT_RGB565: | |
611 | cafe_reg_write_mask(cam, REG_CTRL0, | |
612 | C0_DF_RGB|C0_RGBF_565|C0_RGB5_BGGR, | |
613 | C0_DF_MASK); | |
614 | break; | |
615 | ||
616 | default: | |
617 | cam_err(cam, "Unknown format %x\n", cam->pix_format.pixelformat); | |
618 | break; | |
619 | } | |
620 | /* | |
621 | * Make sure it knows we want to use hsync/vsync. | |
622 | */ | |
623 | cafe_reg_write_mask(cam, REG_CTRL0, C0_SIF_HVSYNC, | |
624 | C0_SIFM_MASK); | |
625 | } | |
626 | ||
627 | ||
628 | /* | |
629 | * Configure the controller for operation; caller holds the | |
630 | * device mutex. | |
631 | */ | |
632 | static int cafe_ctlr_configure(struct cafe_camera *cam) | |
633 | { | |
634 | unsigned long flags; | |
635 | ||
636 | spin_lock_irqsave(&cam->dev_lock, flags); | |
637 | cafe_ctlr_dma(cam); | |
638 | cafe_ctlr_image(cam); | |
639 | cafe_set_config_needed(cam, 0); | |
640 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
641 | return 0; | |
642 | } | |
643 | ||
644 | static void cafe_ctlr_irq_enable(struct cafe_camera *cam) | |
645 | { | |
646 | /* | |
647 | * Clear any pending interrupts, since we do not | |
648 | * expect to have I/O active prior to enabling. | |
649 | */ | |
650 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); | |
651 | cafe_reg_set_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
652 | } | |
653 | ||
654 | static void cafe_ctlr_irq_disable(struct cafe_camera *cam) | |
655 | { | |
656 | cafe_reg_clear_bit(cam, REG_IRQMASK, FRAMEIRQS); | |
657 | } | |
658 | ||
659 | /* | |
660 | * Make the controller start grabbing images. Everything must | |
661 | * be set up before doing this. | |
662 | */ | |
663 | static void cafe_ctlr_start(struct cafe_camera *cam) | |
664 | { | |
665 | /* set_bit performs a read, so no other barrier should be | |
666 | needed here */ | |
667 | cafe_reg_set_bit(cam, REG_CTRL0, C0_ENABLE); | |
668 | } | |
669 | ||
670 | static void cafe_ctlr_stop(struct cafe_camera *cam) | |
671 | { | |
672 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
673 | } | |
674 | ||
675 | static void cafe_ctlr_init(struct cafe_camera *cam) | |
676 | { | |
677 | unsigned long flags; | |
678 | ||
679 | spin_lock_irqsave(&cam->dev_lock, flags); | |
680 | /* | |
681 | * Added magic to bring up the hardware on the B-Test board | |
682 | */ | |
683 | cafe_reg_write(cam, 0x3038, 0x8); | |
684 | cafe_reg_write(cam, 0x315c, 0x80008); | |
685 | /* | |
686 | * Go through the dance needed to wake the device up. | |
687 | * Note that these registers are global and shared | |
688 | * with the NAND and SD devices. Interaction between the | |
689 | * three still needs to be examined. | |
690 | */ | |
691 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRS|GCSR_MRS); /* Needed? */ | |
692 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRC); | |
693 | cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRS); | |
5b50ed7c JC |
694 | /* |
695 | * Here we must wait a bit for the controller to come around. | |
696 | */ | |
697 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
70cd685d | 698 | msleep(5); |
5b50ed7c JC |
699 | spin_lock_irqsave(&cam->dev_lock, flags); |
700 | ||
d905b382 JC |
701 | cafe_reg_write(cam, REG_GL_CSR, GCSR_CCIC_EN|GCSR_SRC|GCSR_MRC); |
702 | cafe_reg_set_bit(cam, REG_GL_IMASK, GIMSK_CCIC_EN); | |
703 | /* | |
704 | * Make sure it's not powered down. | |
705 | */ | |
706 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
707 | /* | |
708 | * Turn off the enable bit. It sure should be off anyway, | |
709 | * but it's good to be sure. | |
710 | */ | |
711 | cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); | |
712 | /* | |
713 | * Mask all interrupts. | |
714 | */ | |
715 | cafe_reg_write(cam, REG_IRQMASK, 0); | |
716 | /* | |
717 | * Clock the sensor appropriately. Controller clock should | |
718 | * be 48MHz, sensor "typical" value is half that. | |
719 | */ | |
720 | cafe_reg_write_mask(cam, REG_CLKCTRL, 2, CLK_DIV_MASK); | |
721 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
722 | } | |
723 | ||
724 | ||
725 | /* | |
726 | * Stop the controller, and don't return until we're really sure that no | |
727 | * further DMA is going on. | |
728 | */ | |
729 | static void cafe_ctlr_stop_dma(struct cafe_camera *cam) | |
730 | { | |
731 | unsigned long flags; | |
732 | ||
733 | /* | |
734 | * Theory: stop the camera controller (whether it is operating | |
735 | * or not). Delay briefly just in case we race with the SOF | |
736 | * interrupt, then wait until no DMA is active. | |
737 | */ | |
738 | spin_lock_irqsave(&cam->dev_lock, flags); | |
739 | cafe_ctlr_stop(cam); | |
740 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
741 | mdelay(1); | |
742 | wait_event_timeout(cam->iowait, | |
743 | !test_bit(CF_DMA_ACTIVE, &cam->flags), HZ); | |
744 | if (test_bit(CF_DMA_ACTIVE, &cam->flags)) | |
745 | cam_err(cam, "Timeout waiting for DMA to end\n"); | |
746 | /* This would be bad news - what now? */ | |
747 | spin_lock_irqsave(&cam->dev_lock, flags); | |
748 | cam->state = S_IDLE; | |
749 | cafe_ctlr_irq_disable(cam); | |
750 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
751 | } | |
752 | ||
753 | /* | |
754 | * Power up and down. | |
755 | */ | |
756 | static void cafe_ctlr_power_up(struct cafe_camera *cam) | |
757 | { | |
758 | unsigned long flags; | |
759 | ||
760 | spin_lock_irqsave(&cam->dev_lock, flags); | |
761 | cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); | |
7acf90c7 JC |
762 | /* |
763 | * Part one of the sensor dance: turn the global | |
764 | * GPIO signal on. | |
765 | */ | |
766 | cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON); | |
767 | cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT|GGPIO_VAL); | |
d905b382 JC |
768 | /* |
769 | * Put the sensor into operational mode (assumes OLPC-style | |
770 | * wiring). Control 0 is reset - set to 1 to operate. | |
771 | * Control 1 is power down, set to 0 to operate. | |
772 | */ | |
f9a76156 | 773 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN); /* pwr up, reset */ |
21508b90 | 774 | /* mdelay(1); */ /* Marvell says 1ms will do it */ |
d905b382 | 775 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C0); |
21508b90 | 776 | /* mdelay(1); */ /* Enough? */ |
d905b382 | 777 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
7acf90c7 | 778 | msleep(5); /* Just to be sure */ |
d905b382 JC |
779 | } |
780 | ||
781 | static void cafe_ctlr_power_down(struct cafe_camera *cam) | |
782 | { | |
783 | unsigned long flags; | |
784 | ||
785 | spin_lock_irqsave(&cam->dev_lock, flags); | |
786 | cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C1); | |
7acf90c7 JC |
787 | cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON); |
788 | cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT); | |
d905b382 JC |
789 | cafe_reg_set_bit(cam, REG_CTRL1, C1_PWRDWN); |
790 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
791 | } | |
792 | ||
793 | /* -------------------------------------------------------------------- */ | |
794 | /* | |
795 | * Communications with the sensor. | |
796 | */ | |
797 | ||
d905b382 JC |
798 | static int __cafe_cam_reset(struct cafe_camera *cam) |
799 | { | |
8bcfd7af | 800 | return sensor_call(cam, core, reset, 0); |
d905b382 JC |
801 | } |
802 | ||
803 | /* | |
804 | * We have found the sensor on the i2c. Let's try to have a | |
805 | * conversation. | |
806 | */ | |
807 | static int cafe_cam_init(struct cafe_camera *cam) | |
808 | { | |
aecde8b5 | 809 | struct v4l2_dbg_chip_ident chip; |
d905b382 JC |
810 | int ret; |
811 | ||
812 | mutex_lock(&cam->s_mutex); | |
813 | if (cam->state != S_NOTREADY) | |
814 | cam_warn(cam, "Cam init with device in funky state %d", | |
815 | cam->state); | |
816 | ret = __cafe_cam_reset(cam); | |
817 | if (ret) | |
818 | goto out; | |
90c69f29 | 819 | chip.ident = V4L2_IDENT_NONE; |
aecde8b5 | 820 | chip.match.type = V4L2_CHIP_MATCH_I2C_ADDR; |
8bcfd7af HV |
821 | chip.match.addr = cam->sensor_addr; |
822 | ret = sensor_call(cam, core, g_chip_ident, &chip); | |
d905b382 JC |
823 | if (ret) |
824 | goto out; | |
3434eb7e | 825 | cam->sensor_type = chip.ident; |
d905b382 | 826 | if (cam->sensor_type != V4L2_IDENT_OV7670) { |
8bcfd7af | 827 | cam_err(cam, "Unsupported sensor type 0x%x", cam->sensor_type); |
d905b382 JC |
828 | ret = -EINVAL; |
829 | goto out; | |
830 | } | |
831 | /* Get/set parameters? */ | |
832 | ret = 0; | |
833 | cam->state = S_IDLE; | |
834 | out: | |
7acf90c7 | 835 | cafe_ctlr_power_down(cam); |
d905b382 JC |
836 | mutex_unlock(&cam->s_mutex); |
837 | return ret; | |
838 | } | |
839 | ||
840 | /* | |
841 | * Configure the sensor to match the parameters we have. Caller should | |
842 | * hold s_mutex | |
843 | */ | |
844 | static int cafe_cam_set_flip(struct cafe_camera *cam) | |
845 | { | |
846 | struct v4l2_control ctrl; | |
847 | ||
848 | memset(&ctrl, 0, sizeof(ctrl)); | |
849 | ctrl.id = V4L2_CID_VFLIP; | |
850 | ctrl.value = flip; | |
8bcfd7af | 851 | return sensor_call(cam, core, s_ctrl, &ctrl); |
d905b382 JC |
852 | } |
853 | ||
854 | ||
855 | static int cafe_cam_configure(struct cafe_camera *cam) | |
856 | { | |
1e426228 | 857 | struct v4l2_mbus_framefmt mbus_fmt; |
8bcfd7af | 858 | int ret; |
d905b382 JC |
859 | |
860 | if (cam->state != S_IDLE) | |
861 | return -EINVAL; | |
1e426228 | 862 | v4l2_fill_mbus_format(&mbus_fmt, &cam->pix_format, cam->mbus_code); |
8bcfd7af | 863 | ret = sensor_call(cam, core, init, 0); |
d905b382 | 864 | if (ret == 0) |
1e426228 | 865 | ret = sensor_call(cam, video, s_mbus_fmt, &mbus_fmt); |
d905b382 JC |
866 | /* |
867 | * OV7670 does weird things if flip is set *before* format... | |
868 | */ | |
869 | ret += cafe_cam_set_flip(cam); | |
870 | return ret; | |
871 | } | |
872 | ||
873 | /* -------------------------------------------------------------------- */ | |
874 | /* | |
875 | * DMA buffer management. These functions need s_mutex held. | |
876 | */ | |
877 | ||
878 | /* FIXME: this is inefficient as hell, since dma_alloc_coherent just | |
879 | * does a get_free_pages() call, and we waste a good chunk of an orderN | |
880 | * allocation. Should try to allocate the whole set in one chunk. | |
881 | */ | |
882 | static int cafe_alloc_dma_bufs(struct cafe_camera *cam, int loadtime) | |
883 | { | |
884 | int i; | |
885 | ||
886 | cafe_set_config_needed(cam, 1); | |
887 | if (loadtime) | |
888 | cam->dma_buf_size = dma_buf_size; | |
a66d2336 | 889 | else |
d905b382 | 890 | cam->dma_buf_size = cam->pix_format.sizeimage; |
d905b382 JC |
891 | if (n_dma_bufs > 3) |
892 | n_dma_bufs = 3; | |
893 | ||
894 | cam->nbufs = 0; | |
895 | for (i = 0; i < n_dma_bufs; i++) { | |
896 | cam->dma_bufs[i] = dma_alloc_coherent(&cam->pdev->dev, | |
897 | cam->dma_buf_size, cam->dma_handles + i, | |
898 | GFP_KERNEL); | |
899 | if (cam->dma_bufs[i] == NULL) { | |
900 | cam_warn(cam, "Failed to allocate DMA buffer\n"); | |
901 | break; | |
902 | } | |
903 | /* For debug, remove eventually */ | |
904 | memset(cam->dma_bufs[i], 0xcc, cam->dma_buf_size); | |
905 | (cam->nbufs)++; | |
906 | } | |
907 | ||
908 | switch (cam->nbufs) { | |
909 | case 1: | |
910 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
911 | cam->dma_bufs[0], cam->dma_handles[0]); | |
912 | cam->nbufs = 0; | |
913 | case 0: | |
914 | cam_err(cam, "Insufficient DMA buffers, cannot operate\n"); | |
915 | return -ENOMEM; | |
916 | ||
917 | case 2: | |
918 | if (n_dma_bufs > 2) | |
919 | cam_warn(cam, "Will limp along with only 2 buffers\n"); | |
920 | break; | |
921 | } | |
922 | return 0; | |
923 | } | |
924 | ||
925 | static void cafe_free_dma_bufs(struct cafe_camera *cam) | |
926 | { | |
927 | int i; | |
928 | ||
929 | for (i = 0; i < cam->nbufs; i++) { | |
930 | dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size, | |
931 | cam->dma_bufs[i], cam->dma_handles[i]); | |
932 | cam->dma_bufs[i] = NULL; | |
933 | } | |
934 | cam->nbufs = 0; | |
935 | } | |
936 | ||
937 | ||
938 | ||
939 | ||
940 | ||
941 | /* ----------------------------------------------------------------------- */ | |
942 | /* | |
943 | * Here starts the V4L2 interface code. | |
944 | */ | |
945 | ||
946 | /* | |
947 | * Read an image from the device. | |
948 | */ | |
949 | static ssize_t cafe_deliver_buffer(struct cafe_camera *cam, | |
950 | char __user *buffer, size_t len, loff_t *pos) | |
951 | { | |
952 | int bufno; | |
953 | unsigned long flags; | |
954 | ||
955 | spin_lock_irqsave(&cam->dev_lock, flags); | |
956 | if (cam->next_buf < 0) { | |
957 | cam_err(cam, "deliver_buffer: No next buffer\n"); | |
958 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
959 | return -EIO; | |
960 | } | |
961 | bufno = cam->next_buf; | |
962 | clear_bit(bufno, &cam->flags); | |
963 | if (++(cam->next_buf) >= cam->nbufs) | |
964 | cam->next_buf = 0; | |
965 | if (! test_bit(cam->next_buf, &cam->flags)) | |
966 | cam->next_buf = -1; | |
967 | cam->specframes = 0; | |
968 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
969 | ||
970 | if (len > cam->pix_format.sizeimage) | |
971 | len = cam->pix_format.sizeimage; | |
972 | if (copy_to_user(buffer, cam->dma_bufs[bufno], len)) | |
973 | return -EFAULT; | |
974 | (*pos) += len; | |
975 | return len; | |
976 | } | |
977 | ||
978 | /* | |
979 | * Get everything ready, and start grabbing frames. | |
980 | */ | |
981 | static int cafe_read_setup(struct cafe_camera *cam, enum cafe_state state) | |
982 | { | |
983 | int ret; | |
984 | unsigned long flags; | |
985 | ||
986 | /* | |
987 | * Configuration. If we still don't have DMA buffers, | |
988 | * make one last, desperate attempt. | |
989 | */ | |
990 | if (cam->nbufs == 0) | |
991 | if (cafe_alloc_dma_bufs(cam, 0)) | |
992 | return -ENOMEM; | |
993 | ||
994 | if (cafe_needs_config(cam)) { | |
995 | cafe_cam_configure(cam); | |
996 | ret = cafe_ctlr_configure(cam); | |
997 | if (ret) | |
998 | return ret; | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * Turn it loose. | |
1003 | */ | |
1004 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1005 | cafe_reset_buffers(cam); | |
1006 | cafe_ctlr_irq_enable(cam); | |
1007 | cam->state = state; | |
1008 | cafe_ctlr_start(cam); | |
1009 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | ||
1014 | static ssize_t cafe_v4l_read(struct file *filp, | |
1015 | char __user *buffer, size_t len, loff_t *pos) | |
1016 | { | |
1017 | struct cafe_camera *cam = filp->private_data; | |
b9109b75 | 1018 | int ret = 0; |
d905b382 JC |
1019 | |
1020 | /* | |
1021 | * Perhaps we're in speculative read mode and already | |
1022 | * have data? | |
1023 | */ | |
1024 | mutex_lock(&cam->s_mutex); | |
1025 | if (cam->state == S_SPECREAD) { | |
1026 | if (cam->next_buf >= 0) { | |
1027 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
1028 | if (ret != 0) | |
1029 | goto out_unlock; | |
1030 | } | |
1031 | } else if (cam->state == S_FLAKED || cam->state == S_NOTREADY) { | |
1032 | ret = -EIO; | |
1033 | goto out_unlock; | |
1034 | } else if (cam->state != S_IDLE) { | |
1035 | ret = -EBUSY; | |
1036 | goto out_unlock; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * v4l2: multiple processes can open the device, but only | |
1041 | * one gets to grab data from it. | |
1042 | */ | |
1043 | if (cam->owner && cam->owner != filp) { | |
1044 | ret = -EBUSY; | |
1045 | goto out_unlock; | |
1046 | } | |
1047 | cam->owner = filp; | |
1048 | ||
1049 | /* | |
1050 | * Do setup if need be. | |
1051 | */ | |
1052 | if (cam->state != S_SPECREAD) { | |
1053 | ret = cafe_read_setup(cam, S_SINGLEREAD); | |
1054 | if (ret) | |
1055 | goto out_unlock; | |
1056 | } | |
1057 | /* | |
1058 | * Wait for something to happen. This should probably | |
1059 | * be interruptible (FIXME). | |
1060 | */ | |
1061 | wait_event_timeout(cam->iowait, cam->next_buf >= 0, HZ); | |
1062 | if (cam->next_buf < 0) { | |
1063 | cam_err(cam, "read() operation timed out\n"); | |
1064 | cafe_ctlr_stop_dma(cam); | |
1065 | ret = -EIO; | |
1066 | goto out_unlock; | |
1067 | } | |
1068 | /* | |
1069 | * Give them their data and we should be done. | |
1070 | */ | |
1071 | ret = cafe_deliver_buffer(cam, buffer, len, pos); | |
1072 | ||
1073 | out_unlock: | |
1074 | mutex_unlock(&cam->s_mutex); | |
1075 | return ret; | |
1076 | } | |
1077 | ||
1078 | ||
1079 | ||
1080 | ||
1081 | ||
1082 | ||
1083 | ||
1084 | ||
1085 | /* | |
1086 | * Streaming I/O support. | |
1087 | */ | |
1088 | ||
1089 | ||
1090 | ||
1091 | static int cafe_vidioc_streamon(struct file *filp, void *priv, | |
1092 | enum v4l2_buf_type type) | |
1093 | { | |
1094 | struct cafe_camera *cam = filp->private_data; | |
1095 | int ret = -EINVAL; | |
1096 | ||
1097 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1098 | goto out; | |
1099 | mutex_lock(&cam->s_mutex); | |
1100 | if (cam->state != S_IDLE || cam->n_sbufs == 0) | |
1101 | goto out_unlock; | |
1102 | ||
1103 | cam->sequence = 0; | |
1104 | ret = cafe_read_setup(cam, S_STREAMING); | |
1105 | ||
1106 | out_unlock: | |
1107 | mutex_unlock(&cam->s_mutex); | |
1108 | out: | |
1109 | return ret; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | static int cafe_vidioc_streamoff(struct file *filp, void *priv, | |
1114 | enum v4l2_buf_type type) | |
1115 | { | |
1116 | struct cafe_camera *cam = filp->private_data; | |
1117 | int ret = -EINVAL; | |
1118 | ||
1119 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1120 | goto out; | |
1121 | mutex_lock(&cam->s_mutex); | |
1122 | if (cam->state != S_STREAMING) | |
1123 | goto out_unlock; | |
1124 | ||
1125 | cafe_ctlr_stop_dma(cam); | |
1126 | ret = 0; | |
1127 | ||
1128 | out_unlock: | |
1129 | mutex_unlock(&cam->s_mutex); | |
1130 | out: | |
1131 | return ret; | |
1132 | } | |
1133 | ||
1134 | ||
1135 | ||
1136 | static int cafe_setup_siobuf(struct cafe_camera *cam, int index) | |
1137 | { | |
1138 | struct cafe_sio_buffer *buf = cam->sb_bufs + index; | |
1139 | ||
1140 | INIT_LIST_HEAD(&buf->list); | |
1141 | buf->v4lbuf.length = PAGE_ALIGN(cam->pix_format.sizeimage); | |
1142 | buf->buffer = vmalloc_user(buf->v4lbuf.length); | |
1143 | if (buf->buffer == NULL) | |
1144 | return -ENOMEM; | |
1145 | buf->mapcount = 0; | |
1146 | buf->cam = cam; | |
1147 | ||
1148 | buf->v4lbuf.index = index; | |
1149 | buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1150 | buf->v4lbuf.field = V4L2_FIELD_NONE; | |
1151 | buf->v4lbuf.memory = V4L2_MEMORY_MMAP; | |
1152 | /* | |
c1accaa2 | 1153 | * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg |
d905b382 JC |
1154 | * just uses the length times the index, but the spec warns |
1155 | * against doing just that - vma merging problems. So we | |
1156 | * leave a gap between each pair of buffers. | |
1157 | */ | |
1158 | buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length; | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | static int cafe_free_sio_buffers(struct cafe_camera *cam) | |
1163 | { | |
1164 | int i; | |
1165 | ||
1166 | /* | |
1167 | * If any buffers are mapped, we cannot free them at all. | |
1168 | */ | |
1169 | for (i = 0; i < cam->n_sbufs; i++) | |
1170 | if (cam->sb_bufs[i].mapcount > 0) | |
1171 | return -EBUSY; | |
1172 | /* | |
1173 | * OK, let's do it. | |
1174 | */ | |
1175 | for (i = 0; i < cam->n_sbufs; i++) | |
1176 | vfree(cam->sb_bufs[i].buffer); | |
1177 | cam->n_sbufs = 0; | |
1178 | kfree(cam->sb_bufs); | |
1179 | cam->sb_bufs = NULL; | |
1180 | INIT_LIST_HEAD(&cam->sb_avail); | |
1181 | INIT_LIST_HEAD(&cam->sb_full); | |
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | ||
1186 | ||
1187 | static int cafe_vidioc_reqbufs(struct file *filp, void *priv, | |
1188 | struct v4l2_requestbuffers *req) | |
1189 | { | |
1190 | struct cafe_camera *cam = filp->private_data; | |
3198cf67 | 1191 | int ret = 0; /* Silence warning */ |
d905b382 JC |
1192 | |
1193 | /* | |
1194 | * Make sure it's something we can do. User pointers could be | |
1195 | * implemented without great pain, but that's not been done yet. | |
1196 | */ | |
d905b382 JC |
1197 | if (req->memory != V4L2_MEMORY_MMAP) |
1198 | return -EINVAL; | |
1199 | /* | |
1200 | * If they ask for zero buffers, they really want us to stop streaming | |
1201 | * (if it's happening) and free everything. Should we check owner? | |
1202 | */ | |
1203 | mutex_lock(&cam->s_mutex); | |
1204 | if (req->count == 0) { | |
1205 | if (cam->state == S_STREAMING) | |
1206 | cafe_ctlr_stop_dma(cam); | |
1207 | ret = cafe_free_sio_buffers (cam); | |
1208 | goto out; | |
1209 | } | |
1210 | /* | |
1211 | * Device needs to be idle and working. We *could* try to do the | |
1212 | * right thing in S_SPECREAD by shutting things down, but it | |
1213 | * probably doesn't matter. | |
1214 | */ | |
1215 | if (cam->state != S_IDLE || (cam->owner && cam->owner != filp)) { | |
1216 | ret = -EBUSY; | |
1217 | goto out; | |
1218 | } | |
1219 | cam->owner = filp; | |
1220 | ||
1221 | if (req->count < min_buffers) | |
1222 | req->count = min_buffers; | |
1223 | else if (req->count > max_buffers) | |
1224 | req->count = max_buffers; | |
1225 | if (cam->n_sbufs > 0) { | |
1226 | ret = cafe_free_sio_buffers(cam); | |
1227 | if (ret) | |
1228 | goto out; | |
1229 | } | |
1230 | ||
1231 | cam->sb_bufs = kzalloc(req->count*sizeof(struct cafe_sio_buffer), | |
1232 | GFP_KERNEL); | |
1233 | if (cam->sb_bufs == NULL) { | |
1234 | ret = -ENOMEM; | |
1235 | goto out; | |
1236 | } | |
1237 | for (cam->n_sbufs = 0; cam->n_sbufs < req->count; (cam->n_sbufs++)) { | |
1238 | ret = cafe_setup_siobuf(cam, cam->n_sbufs); | |
1239 | if (ret) | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | if (cam->n_sbufs == 0) /* no luck at all - ret already set */ | |
1244 | kfree(cam->sb_bufs); | |
d905b382 JC |
1245 | req->count = cam->n_sbufs; /* In case of partial success */ |
1246 | ||
1247 | out: | |
1248 | mutex_unlock(&cam->s_mutex); | |
1249 | return ret; | |
1250 | } | |
1251 | ||
1252 | ||
1253 | static int cafe_vidioc_querybuf(struct file *filp, void *priv, | |
1254 | struct v4l2_buffer *buf) | |
1255 | { | |
1256 | struct cafe_camera *cam = filp->private_data; | |
1257 | int ret = -EINVAL; | |
1258 | ||
1259 | mutex_lock(&cam->s_mutex); | |
e33ee31a | 1260 | if (buf->index >= cam->n_sbufs) |
d905b382 JC |
1261 | goto out; |
1262 | *buf = cam->sb_bufs[buf->index].v4lbuf; | |
1263 | ret = 0; | |
1264 | out: | |
1265 | mutex_unlock(&cam->s_mutex); | |
1266 | return ret; | |
1267 | } | |
1268 | ||
1269 | static int cafe_vidioc_qbuf(struct file *filp, void *priv, | |
1270 | struct v4l2_buffer *buf) | |
1271 | { | |
1272 | struct cafe_camera *cam = filp->private_data; | |
1273 | struct cafe_sio_buffer *sbuf; | |
1274 | int ret = -EINVAL; | |
1275 | unsigned long flags; | |
1276 | ||
1277 | mutex_lock(&cam->s_mutex); | |
e33ee31a | 1278 | if (buf->index >= cam->n_sbufs) |
d905b382 JC |
1279 | goto out; |
1280 | sbuf = cam->sb_bufs + buf->index; | |
1281 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) { | |
1282 | ret = 0; /* Already queued?? */ | |
1283 | goto out; | |
1284 | } | |
1285 | if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_DONE) { | |
1286 | /* Spec doesn't say anything, seems appropriate tho */ | |
1287 | ret = -EBUSY; | |
1288 | goto out; | |
1289 | } | |
1290 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED; | |
1291 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1292 | list_add(&sbuf->list, &cam->sb_avail); | |
1293 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1294 | ret = 0; | |
1295 | out: | |
1296 | mutex_unlock(&cam->s_mutex); | |
1297 | return ret; | |
1298 | } | |
1299 | ||
1300 | static int cafe_vidioc_dqbuf(struct file *filp, void *priv, | |
1301 | struct v4l2_buffer *buf) | |
1302 | { | |
1303 | struct cafe_camera *cam = filp->private_data; | |
1304 | struct cafe_sio_buffer *sbuf; | |
1305 | int ret = -EINVAL; | |
1306 | unsigned long flags; | |
1307 | ||
1308 | mutex_lock(&cam->s_mutex); | |
d905b382 JC |
1309 | if (cam->state != S_STREAMING) |
1310 | goto out_unlock; | |
1311 | if (list_empty(&cam->sb_full) && filp->f_flags & O_NONBLOCK) { | |
1312 | ret = -EAGAIN; | |
1313 | goto out_unlock; | |
1314 | } | |
1315 | ||
1316 | while (list_empty(&cam->sb_full) && cam->state == S_STREAMING) { | |
1317 | mutex_unlock(&cam->s_mutex); | |
1318 | if (wait_event_interruptible(cam->iowait, | |
1319 | !list_empty(&cam->sb_full))) { | |
1320 | ret = -ERESTARTSYS; | |
1321 | goto out; | |
1322 | } | |
1323 | mutex_lock(&cam->s_mutex); | |
1324 | } | |
1325 | ||
1326 | if (cam->state != S_STREAMING) | |
1327 | ret = -EINTR; | |
1328 | else { | |
1329 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1330 | /* Should probably recheck !list_empty() here */ | |
1331 | sbuf = list_entry(cam->sb_full.next, | |
1332 | struct cafe_sio_buffer, list); | |
1333 | list_del_init(&sbuf->list); | |
1334 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1335 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE; | |
1336 | *buf = sbuf->v4lbuf; | |
1337 | ret = 0; | |
1338 | } | |
1339 | ||
1340 | out_unlock: | |
1341 | mutex_unlock(&cam->s_mutex); | |
1342 | out: | |
1343 | return ret; | |
1344 | } | |
1345 | ||
1346 | ||
1347 | ||
1348 | static void cafe_v4l_vm_open(struct vm_area_struct *vma) | |
1349 | { | |
1350 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1351 | /* | |
1352 | * Locking: done under mmap_sem, so we don't need to | |
1353 | * go back to the camera lock here. | |
1354 | */ | |
1355 | sbuf->mapcount++; | |
1356 | } | |
1357 | ||
1358 | ||
1359 | static void cafe_v4l_vm_close(struct vm_area_struct *vma) | |
1360 | { | |
1361 | struct cafe_sio_buffer *sbuf = vma->vm_private_data; | |
1362 | ||
1363 | mutex_lock(&sbuf->cam->s_mutex); | |
1364 | sbuf->mapcount--; | |
1365 | /* Docs say we should stop I/O too... */ | |
1366 | if (sbuf->mapcount == 0) | |
1367 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
1368 | mutex_unlock(&sbuf->cam->s_mutex); | |
1369 | } | |
1370 | ||
f0f37e2f | 1371 | static const struct vm_operations_struct cafe_v4l_vm_ops = { |
d905b382 JC |
1372 | .open = cafe_v4l_vm_open, |
1373 | .close = cafe_v4l_vm_close | |
1374 | }; | |
1375 | ||
1376 | ||
1377 | static int cafe_v4l_mmap(struct file *filp, struct vm_area_struct *vma) | |
1378 | { | |
1379 | struct cafe_camera *cam = filp->private_data; | |
1380 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
1381 | int ret = -EINVAL; | |
1382 | int i; | |
1383 | struct cafe_sio_buffer *sbuf = NULL; | |
1384 | ||
1385 | if (! (vma->vm_flags & VM_WRITE) || ! (vma->vm_flags & VM_SHARED)) | |
1386 | return -EINVAL; | |
1387 | /* | |
1388 | * Find the buffer they are looking for. | |
1389 | */ | |
1390 | mutex_lock(&cam->s_mutex); | |
1391 | for (i = 0; i < cam->n_sbufs; i++) | |
1392 | if (cam->sb_bufs[i].v4lbuf.m.offset == offset) { | |
1393 | sbuf = cam->sb_bufs + i; | |
1394 | break; | |
1395 | } | |
1396 | if (sbuf == NULL) | |
1397 | goto out; | |
1398 | ||
1399 | ret = remap_vmalloc_range(vma, sbuf->buffer, 0); | |
1400 | if (ret) | |
1401 | goto out; | |
1402 | vma->vm_flags |= VM_DONTEXPAND; | |
1403 | vma->vm_private_data = sbuf; | |
1404 | vma->vm_ops = &cafe_v4l_vm_ops; | |
1405 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED; | |
1406 | cafe_v4l_vm_open(vma); | |
1407 | ret = 0; | |
1408 | out: | |
1409 | mutex_unlock(&cam->s_mutex); | |
1410 | return ret; | |
1411 | } | |
1412 | ||
1413 | ||
1414 | ||
bec43661 | 1415 | static int cafe_v4l_open(struct file *filp) |
d905b382 | 1416 | { |
21508b90 | 1417 | struct cafe_camera *cam = video_drvdata(filp); |
d905b382 | 1418 | |
d905b382 JC |
1419 | filp->private_data = cam; |
1420 | ||
1421 | mutex_lock(&cam->s_mutex); | |
1422 | if (cam->users == 0) { | |
1423 | cafe_ctlr_power_up(cam); | |
1424 | __cafe_cam_reset(cam); | |
1425 | cafe_set_config_needed(cam, 1); | |
1426 | /* FIXME make sure this is complete */ | |
1427 | } | |
1428 | (cam->users)++; | |
1429 | mutex_unlock(&cam->s_mutex); | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | ||
bec43661 | 1434 | static int cafe_v4l_release(struct file *filp) |
d905b382 JC |
1435 | { |
1436 | struct cafe_camera *cam = filp->private_data; | |
1437 | ||
1438 | mutex_lock(&cam->s_mutex); | |
1439 | (cam->users)--; | |
1440 | if (filp == cam->owner) { | |
1441 | cafe_ctlr_stop_dma(cam); | |
1442 | cafe_free_sio_buffers(cam); | |
1443 | cam->owner = NULL; | |
1444 | } | |
f9a76156 | 1445 | if (cam->users == 0) { |
d905b382 | 1446 | cafe_ctlr_power_down(cam); |
23869e23 | 1447 | if (alloc_bufs_at_read) |
f9a76156 JC |
1448 | cafe_free_dma_bufs(cam); |
1449 | } | |
d905b382 JC |
1450 | mutex_unlock(&cam->s_mutex); |
1451 | return 0; | |
1452 | } | |
1453 | ||
1454 | ||
1455 | ||
1456 | static unsigned int cafe_v4l_poll(struct file *filp, | |
1457 | struct poll_table_struct *pt) | |
1458 | { | |
1459 | struct cafe_camera *cam = filp->private_data; | |
1460 | ||
1461 | poll_wait(filp, &cam->iowait, pt); | |
1462 | if (cam->next_buf >= 0) | |
1463 | return POLLIN | POLLRDNORM; | |
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | ||
1468 | ||
1469 | static int cafe_vidioc_queryctrl(struct file *filp, void *priv, | |
1470 | struct v4l2_queryctrl *qc) | |
1471 | { | |
21508b90 | 1472 | struct cafe_camera *cam = priv; |
d905b382 JC |
1473 | int ret; |
1474 | ||
1475 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1476 | ret = sensor_call(cam, core, queryctrl, qc); |
d905b382 JC |
1477 | mutex_unlock(&cam->s_mutex); |
1478 | return ret; | |
1479 | } | |
1480 | ||
1481 | ||
1482 | static int cafe_vidioc_g_ctrl(struct file *filp, void *priv, | |
1483 | struct v4l2_control *ctrl) | |
1484 | { | |
21508b90 | 1485 | struct cafe_camera *cam = priv; |
d905b382 JC |
1486 | int ret; |
1487 | ||
1488 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1489 | ret = sensor_call(cam, core, g_ctrl, ctrl); |
d905b382 JC |
1490 | mutex_unlock(&cam->s_mutex); |
1491 | return ret; | |
1492 | } | |
1493 | ||
1494 | ||
1495 | static int cafe_vidioc_s_ctrl(struct file *filp, void *priv, | |
1496 | struct v4l2_control *ctrl) | |
1497 | { | |
21508b90 | 1498 | struct cafe_camera *cam = priv; |
d905b382 JC |
1499 | int ret; |
1500 | ||
1501 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1502 | ret = sensor_call(cam, core, s_ctrl, ctrl); |
d905b382 JC |
1503 | mutex_unlock(&cam->s_mutex); |
1504 | return ret; | |
1505 | } | |
1506 | ||
1507 | ||
1508 | ||
1509 | ||
1510 | ||
1511 | static int cafe_vidioc_querycap(struct file *file, void *priv, | |
1512 | struct v4l2_capability *cap) | |
1513 | { | |
1514 | strcpy(cap->driver, "cafe_ccic"); | |
1515 | strcpy(cap->card, "cafe_ccic"); | |
1516 | cap->version = CAFE_VERSION; | |
1517 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | | |
1518 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; | |
1519 | return 0; | |
1520 | } | |
1521 | ||
1522 | ||
1523 | /* | |
1524 | * The default format we use until somebody says otherwise. | |
1525 | */ | |
1e426228 | 1526 | static const struct v4l2_pix_format cafe_def_pix_format = { |
d905b382 JC |
1527 | .width = VGA_WIDTH, |
1528 | .height = VGA_HEIGHT, | |
1529 | .pixelformat = V4L2_PIX_FMT_YUYV, | |
1530 | .field = V4L2_FIELD_NONE, | |
1531 | .bytesperline = VGA_WIDTH*2, | |
1532 | .sizeimage = VGA_WIDTH*VGA_HEIGHT*2, | |
1533 | }; | |
1534 | ||
1e426228 HV |
1535 | static const enum v4l2_mbus_pixelcode cafe_def_mbus_code = |
1536 | V4L2_MBUS_FMT_YUYV8_2X8; | |
1537 | ||
78b526a4 | 1538 | static int cafe_vidioc_enum_fmt_vid_cap(struct file *filp, |
d905b382 JC |
1539 | void *priv, struct v4l2_fmtdesc *fmt) |
1540 | { | |
1e426228 HV |
1541 | if (fmt->index >= N_CAFE_FMTS) |
1542 | return -EINVAL; | |
1543 | strlcpy(fmt->description, cafe_formats[fmt->index].desc, | |
1544 | sizeof(fmt->description)); | |
1545 | fmt->pixelformat = cafe_formats[fmt->index].pixelformat; | |
1546 | return 0; | |
d905b382 JC |
1547 | } |
1548 | ||
78b526a4 | 1549 | static int cafe_vidioc_try_fmt_vid_cap(struct file *filp, void *priv, |
d905b382 JC |
1550 | struct v4l2_format *fmt) |
1551 | { | |
1552 | struct cafe_camera *cam = priv; | |
1e426228 HV |
1553 | struct cafe_format_struct *f; |
1554 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | |
1555 | struct v4l2_mbus_framefmt mbus_fmt; | |
d905b382 JC |
1556 | int ret; |
1557 | ||
1e426228 HV |
1558 | f = cafe_find_format(pix->pixelformat); |
1559 | pix->pixelformat = f->pixelformat; | |
1560 | v4l2_fill_mbus_format(&mbus_fmt, pix, f->mbus_code); | |
d905b382 | 1561 | mutex_lock(&cam->s_mutex); |
1e426228 | 1562 | ret = sensor_call(cam, video, try_mbus_fmt, &mbus_fmt); |
d905b382 | 1563 | mutex_unlock(&cam->s_mutex); |
1e426228 HV |
1564 | v4l2_fill_pix_format(pix, &mbus_fmt); |
1565 | pix->bytesperline = pix->width * f->bpp; | |
1566 | pix->sizeimage = pix->height * pix->bytesperline; | |
d905b382 JC |
1567 | return ret; |
1568 | } | |
1569 | ||
78b526a4 | 1570 | static int cafe_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, |
d905b382 JC |
1571 | struct v4l2_format *fmt) |
1572 | { | |
1573 | struct cafe_camera *cam = priv; | |
1e426228 | 1574 | struct cafe_format_struct *f; |
d905b382 JC |
1575 | int ret; |
1576 | ||
1577 | /* | |
1578 | * Can't do anything if the device is not idle | |
1579 | * Also can't if there are streaming buffers in place. | |
1580 | */ | |
1581 | if (cam->state != S_IDLE || cam->n_sbufs > 0) | |
1582 | return -EBUSY; | |
1e426228 HV |
1583 | |
1584 | f = cafe_find_format(fmt->fmt.pix.pixelformat); | |
1585 | ||
d905b382 JC |
1586 | /* |
1587 | * See if the formatting works in principle. | |
1588 | */ | |
78b526a4 | 1589 | ret = cafe_vidioc_try_fmt_vid_cap(filp, priv, fmt); |
d905b382 JC |
1590 | if (ret) |
1591 | return ret; | |
1592 | /* | |
1593 | * Now we start to change things for real, so let's do it | |
1594 | * under lock. | |
1595 | */ | |
1596 | mutex_lock(&cam->s_mutex); | |
1597 | cam->pix_format = fmt->fmt.pix; | |
1e426228 HV |
1598 | cam->mbus_code = f->mbus_code; |
1599 | ||
d905b382 JC |
1600 | /* |
1601 | * Make sure we have appropriate DMA buffers. | |
1602 | */ | |
1603 | ret = -ENOMEM; | |
1604 | if (cam->nbufs > 0 && cam->dma_buf_size < cam->pix_format.sizeimage) | |
1605 | cafe_free_dma_bufs(cam); | |
1606 | if (cam->nbufs == 0) { | |
1607 | if (cafe_alloc_dma_bufs(cam, 0)) | |
1608 | goto out; | |
1609 | } | |
1610 | /* | |
1611 | * It looks like this might work, so let's program the sensor. | |
1612 | */ | |
1613 | ret = cafe_cam_configure(cam); | |
1614 | if (! ret) | |
1615 | ret = cafe_ctlr_configure(cam); | |
1616 | out: | |
1617 | mutex_unlock(&cam->s_mutex); | |
1618 | return ret; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * Return our stored notion of how the camera is/should be configured. | |
1623 | * The V4l2 spec wants us to be smarter, and actually get this from | |
1624 | * the camera (and not mess with it at open time). Someday. | |
1625 | */ | |
78b526a4 | 1626 | static int cafe_vidioc_g_fmt_vid_cap(struct file *filp, void *priv, |
d905b382 JC |
1627 | struct v4l2_format *f) |
1628 | { | |
1629 | struct cafe_camera *cam = priv; | |
1630 | ||
1631 | f->fmt.pix = cam->pix_format; | |
1632 | return 0; | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * We only have one input - the sensor - so minimize the nonsense here. | |
1637 | */ | |
1638 | static int cafe_vidioc_enum_input(struct file *filp, void *priv, | |
1639 | struct v4l2_input *input) | |
1640 | { | |
1641 | if (input->index != 0) | |
1642 | return -EINVAL; | |
1643 | ||
1644 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1645 | input->std = V4L2_STD_ALL; /* Not sure what should go here */ | |
1646 | strcpy(input->name, "Camera"); | |
1647 | return 0; | |
1648 | } | |
1649 | ||
1650 | static int cafe_vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
1651 | { | |
1652 | *i = 0; | |
1653 | return 0; | |
1654 | } | |
1655 | ||
1656 | static int cafe_vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
1657 | { | |
1658 | if (i != 0) | |
1659 | return -EINVAL; | |
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | /* from vivi.c */ | |
e75f9cee | 1664 | static int cafe_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a) |
d905b382 JC |
1665 | { |
1666 | return 0; | |
1667 | } | |
1668 | ||
c8f5b2f5 JC |
1669 | /* |
1670 | * G/S_PARM. Most of this is done by the sensor, but we are | |
1671 | * the level which controls the number of read buffers. | |
1672 | */ | |
1673 | static int cafe_vidioc_g_parm(struct file *filp, void *priv, | |
1674 | struct v4l2_streamparm *parms) | |
1675 | { | |
1676 | struct cafe_camera *cam = priv; | |
1677 | int ret; | |
1678 | ||
1679 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1680 | ret = sensor_call(cam, video, g_parm, parms); |
c8f5b2f5 JC |
1681 | mutex_unlock(&cam->s_mutex); |
1682 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1683 | return ret; | |
1684 | } | |
1685 | ||
1686 | static int cafe_vidioc_s_parm(struct file *filp, void *priv, | |
1687 | struct v4l2_streamparm *parms) | |
1688 | { | |
1689 | struct cafe_camera *cam = priv; | |
1690 | int ret; | |
1691 | ||
1692 | mutex_lock(&cam->s_mutex); | |
8bcfd7af | 1693 | ret = sensor_call(cam, video, s_parm, parms); |
c8f5b2f5 JC |
1694 | mutex_unlock(&cam->s_mutex); |
1695 | parms->parm.capture.readbuffers = n_dma_bufs; | |
1696 | return ret; | |
1697 | } | |
1698 | ||
69d94f7e HV |
1699 | static int cafe_vidioc_g_chip_ident(struct file *file, void *priv, |
1700 | struct v4l2_dbg_chip_ident *chip) | |
1701 | { | |
1702 | struct cafe_camera *cam = priv; | |
1703 | ||
1704 | chip->ident = V4L2_IDENT_NONE; | |
1705 | chip->revision = 0; | |
1706 | if (v4l2_chip_match_host(&chip->match)) { | |
1707 | chip->ident = V4L2_IDENT_CAFE; | |
1708 | return 0; | |
1709 | } | |
1710 | return sensor_call(cam, core, g_chip_ident, chip); | |
1711 | } | |
1712 | ||
96eb729a DD |
1713 | static int cafe_vidioc_enum_framesizes(struct file *filp, void *priv, |
1714 | struct v4l2_frmsizeenum *sizes) | |
1715 | { | |
1716 | struct cafe_camera *cam = priv; | |
1717 | int ret; | |
1718 | ||
1719 | mutex_lock(&cam->s_mutex); | |
1720 | ret = sensor_call(cam, video, enum_framesizes, sizes); | |
1721 | mutex_unlock(&cam->s_mutex); | |
1722 | return ret; | |
1723 | } | |
1724 | ||
1725 | static int cafe_vidioc_enum_frameintervals(struct file *filp, void *priv, | |
1726 | struct v4l2_frmivalenum *interval) | |
1727 | { | |
1728 | struct cafe_camera *cam = priv; | |
1729 | int ret; | |
1730 | ||
1731 | mutex_lock(&cam->s_mutex); | |
1732 | ret = sensor_call(cam, video, enum_frameintervals, interval); | |
1733 | mutex_unlock(&cam->s_mutex); | |
1734 | return ret; | |
1735 | } | |
1736 | ||
69d94f7e HV |
1737 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
1738 | static int cafe_vidioc_g_register(struct file *file, void *priv, | |
1739 | struct v4l2_dbg_register *reg) | |
1740 | { | |
1741 | struct cafe_camera *cam = priv; | |
1742 | ||
1743 | if (v4l2_chip_match_host(®->match)) { | |
1744 | reg->val = cafe_reg_read(cam, reg->reg); | |
1745 | reg->size = 4; | |
1746 | return 0; | |
1747 | } | |
1748 | return sensor_call(cam, core, g_register, reg); | |
1749 | } | |
1750 | ||
1751 | static int cafe_vidioc_s_register(struct file *file, void *priv, | |
1752 | struct v4l2_dbg_register *reg) | |
1753 | { | |
1754 | struct cafe_camera *cam = priv; | |
1755 | ||
1756 | if (v4l2_chip_match_host(®->match)) { | |
1757 | cafe_reg_write(cam, reg->reg, reg->val); | |
1758 | return 0; | |
1759 | } | |
1760 | return sensor_call(cam, core, s_register, reg); | |
1761 | } | |
1762 | #endif | |
1763 | ||
d905b382 JC |
1764 | /* |
1765 | * This template device holds all of those v4l2 methods; we | |
1766 | * clone it for specific real devices. | |
1767 | */ | |
1768 | ||
bec43661 | 1769 | static const struct v4l2_file_operations cafe_v4l_fops = { |
d905b382 JC |
1770 | .owner = THIS_MODULE, |
1771 | .open = cafe_v4l_open, | |
1772 | .release = cafe_v4l_release, | |
1773 | .read = cafe_v4l_read, | |
1774 | .poll = cafe_v4l_poll, | |
1775 | .mmap = cafe_v4l_mmap, | |
1776 | .ioctl = video_ioctl2, | |
d905b382 JC |
1777 | }; |
1778 | ||
a399810c | 1779 | static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = { |
d905b382 | 1780 | .vidioc_querycap = cafe_vidioc_querycap, |
78b526a4 HV |
1781 | .vidioc_enum_fmt_vid_cap = cafe_vidioc_enum_fmt_vid_cap, |
1782 | .vidioc_try_fmt_vid_cap = cafe_vidioc_try_fmt_vid_cap, | |
1783 | .vidioc_s_fmt_vid_cap = cafe_vidioc_s_fmt_vid_cap, | |
1784 | .vidioc_g_fmt_vid_cap = cafe_vidioc_g_fmt_vid_cap, | |
d905b382 JC |
1785 | .vidioc_enum_input = cafe_vidioc_enum_input, |
1786 | .vidioc_g_input = cafe_vidioc_g_input, | |
1787 | .vidioc_s_input = cafe_vidioc_s_input, | |
1788 | .vidioc_s_std = cafe_vidioc_s_std, | |
1789 | .vidioc_reqbufs = cafe_vidioc_reqbufs, | |
1790 | .vidioc_querybuf = cafe_vidioc_querybuf, | |
1791 | .vidioc_qbuf = cafe_vidioc_qbuf, | |
1792 | .vidioc_dqbuf = cafe_vidioc_dqbuf, | |
1793 | .vidioc_streamon = cafe_vidioc_streamon, | |
1794 | .vidioc_streamoff = cafe_vidioc_streamoff, | |
1795 | .vidioc_queryctrl = cafe_vidioc_queryctrl, | |
1796 | .vidioc_g_ctrl = cafe_vidioc_g_ctrl, | |
1797 | .vidioc_s_ctrl = cafe_vidioc_s_ctrl, | |
c8f5b2f5 JC |
1798 | .vidioc_g_parm = cafe_vidioc_g_parm, |
1799 | .vidioc_s_parm = cafe_vidioc_s_parm, | |
96eb729a DD |
1800 | .vidioc_enum_framesizes = cafe_vidioc_enum_framesizes, |
1801 | .vidioc_enum_frameintervals = cafe_vidioc_enum_frameintervals, | |
69d94f7e HV |
1802 | .vidioc_g_chip_ident = cafe_vidioc_g_chip_ident, |
1803 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1804 | .vidioc_g_register = cafe_vidioc_g_register, | |
1805 | .vidioc_s_register = cafe_vidioc_s_register, | |
1806 | #endif | |
d905b382 JC |
1807 | }; |
1808 | ||
a399810c HV |
1809 | static struct video_device cafe_v4l_template = { |
1810 | .name = "cafe", | |
a399810c HV |
1811 | .tvnorms = V4L2_STD_NTSC_M, |
1812 | .current_norm = V4L2_STD_NTSC_M, /* make mplayer happy */ | |
1813 | ||
1814 | .fops = &cafe_v4l_fops, | |
1815 | .ioctl_ops = &cafe_v4l_ioctl_ops, | |
21508b90 | 1816 | .release = video_device_release_empty, |
a399810c HV |
1817 | }; |
1818 | ||
d905b382 | 1819 | |
d905b382 JC |
1820 | /* ---------------------------------------------------------------------- */ |
1821 | /* | |
1822 | * Interrupt handler stuff | |
1823 | */ | |
1824 | ||
d905b382 JC |
1825 | |
1826 | ||
1827 | static void cafe_frame_tasklet(unsigned long data) | |
1828 | { | |
1829 | struct cafe_camera *cam = (struct cafe_camera *) data; | |
1830 | int i; | |
1831 | unsigned long flags; | |
1832 | struct cafe_sio_buffer *sbuf; | |
1833 | ||
1834 | spin_lock_irqsave(&cam->dev_lock, flags); | |
1835 | for (i = 0; i < cam->nbufs; i++) { | |
1836 | int bufno = cam->next_buf; | |
1837 | if (bufno < 0) { /* "will never happen" */ | |
1838 | cam_err(cam, "No valid bufs in tasklet!\n"); | |
1839 | break; | |
1840 | } | |
1841 | if (++(cam->next_buf) >= cam->nbufs) | |
1842 | cam->next_buf = 0; | |
1843 | if (! test_bit(bufno, &cam->flags)) | |
1844 | continue; | |
1845 | if (list_empty(&cam->sb_avail)) | |
1846 | break; /* Leave it valid, hope for better later */ | |
1847 | clear_bit(bufno, &cam->flags); | |
d905b382 JC |
1848 | sbuf = list_entry(cam->sb_avail.next, |
1849 | struct cafe_sio_buffer, list); | |
5b50ed7c JC |
1850 | /* |
1851 | * Drop the lock during the big copy. This *should* be safe... | |
1852 | */ | |
1853 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
a66d2336 JC |
1854 | memcpy(sbuf->buffer, cam->dma_bufs[bufno], |
1855 | cam->pix_format.sizeimage); | |
d905b382 JC |
1856 | sbuf->v4lbuf.bytesused = cam->pix_format.sizeimage; |
1857 | sbuf->v4lbuf.sequence = cam->buf_seq[bufno]; | |
1858 | sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
1859 | sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE; | |
5b50ed7c | 1860 | spin_lock_irqsave(&cam->dev_lock, flags); |
d905b382 JC |
1861 | list_move_tail(&sbuf->list, &cam->sb_full); |
1862 | } | |
1863 | if (! list_empty(&cam->sb_full)) | |
1864 | wake_up(&cam->iowait); | |
1865 | spin_unlock_irqrestore(&cam->dev_lock, flags); | |
1866 | } | |
1867 | ||
1868 | ||
1869 | ||
1870 | static void cafe_frame_complete(struct cafe_camera *cam, int frame) | |
1871 | { | |
1872 | /* | |
1873 | * Basic frame housekeeping. | |
1874 | */ | |
1875 | if (test_bit(frame, &cam->flags) && printk_ratelimit()) | |
1876 | cam_err(cam, "Frame overrun on %d, frames lost\n", frame); | |
1877 | set_bit(frame, &cam->flags); | |
1878 | clear_bit(CF_DMA_ACTIVE, &cam->flags); | |
1879 | if (cam->next_buf < 0) | |
1880 | cam->next_buf = frame; | |
1881 | cam->buf_seq[frame] = ++(cam->sequence); | |
1882 | ||
1883 | switch (cam->state) { | |
1884 | /* | |
1885 | * If in single read mode, try going speculative. | |
1886 | */ | |
1887 | case S_SINGLEREAD: | |
1888 | cam->state = S_SPECREAD; | |
1889 | cam->specframes = 0; | |
1890 | wake_up(&cam->iowait); | |
1891 | break; | |
1892 | ||
1893 | /* | |
1894 | * If we are already doing speculative reads, and nobody is | |
1895 | * reading them, just stop. | |
1896 | */ | |
1897 | case S_SPECREAD: | |
1898 | if (++(cam->specframes) >= cam->nbufs) { | |
1899 | cafe_ctlr_stop(cam); | |
1900 | cafe_ctlr_irq_disable(cam); | |
1901 | cam->state = S_IDLE; | |
1902 | } | |
1903 | wake_up(&cam->iowait); | |
1904 | break; | |
1905 | /* | |
1906 | * For the streaming case, we defer the real work to the | |
1907 | * camera tasklet. | |
1908 | * | |
1909 | * FIXME: if the application is not consuming the buffers, | |
1910 | * we should eventually put things on hold and restart in | |
1911 | * vidioc_dqbuf(). | |
1912 | */ | |
1913 | case S_STREAMING: | |
1914 | tasklet_schedule(&cam->s_tasklet); | |
1915 | break; | |
1916 | ||
1917 | default: | |
1918 | cam_err(cam, "Frame interrupt in non-operational state\n"); | |
1919 | break; | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | ||
1924 | ||
1925 | ||
1926 | static void cafe_frame_irq(struct cafe_camera *cam, unsigned int irqs) | |
1927 | { | |
1928 | unsigned int frame; | |
1929 | ||
1930 | cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); /* Clear'em all */ | |
1931 | /* | |
1932 | * Handle any frame completions. There really should | |
1933 | * not be more than one of these, or we have fallen | |
1934 | * far behind. | |
1935 | */ | |
1936 | for (frame = 0; frame < cam->nbufs; frame++) | |
1937 | if (irqs & (IRQ_EOF0 << frame)) | |
1938 | cafe_frame_complete(cam, frame); | |
1939 | /* | |
1940 | * If a frame starts, note that we have DMA active. This | |
1941 | * code assumes that we won't get multiple frame interrupts | |
1942 | * at once; may want to rethink that. | |
1943 | */ | |
1944 | if (irqs & (IRQ_SOF0 | IRQ_SOF1 | IRQ_SOF2)) | |
1945 | set_bit(CF_DMA_ACTIVE, &cam->flags); | |
1946 | } | |
1947 | ||
1948 | ||
1949 | ||
1950 | static irqreturn_t cafe_irq(int irq, void *data) | |
1951 | { | |
1952 | struct cafe_camera *cam = data; | |
1953 | unsigned int irqs; | |
1954 | ||
1955 | spin_lock(&cam->dev_lock); | |
1956 | irqs = cafe_reg_read(cam, REG_IRQSTAT); | |
1957 | if ((irqs & ALLIRQS) == 0) { | |
1958 | spin_unlock(&cam->dev_lock); | |
1959 | return IRQ_NONE; | |
1960 | } | |
1961 | if (irqs & FRAMEIRQS) | |
1962 | cafe_frame_irq(cam, irqs); | |
1963 | if (irqs & TWSIIRQS) { | |
1964 | cafe_reg_write(cam, REG_IRQSTAT, TWSIIRQS); | |
1965 | wake_up(&cam->smbus_wait); | |
1966 | } | |
1967 | spin_unlock(&cam->dev_lock); | |
1968 | return IRQ_HANDLED; | |
1969 | } | |
1970 | ||
1971 | ||
1972 | /* -------------------------------------------------------------------------- */ | |
d905b382 JC |
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 | 1994 | mutex_init(&cam->s_mutex); |
d905b382 JC |
1995 | spin_lock_init(&cam->dev_lock); |
1996 | cam->state = S_NOTREADY; | |
1997 | cafe_set_config_needed(cam, 1); | |
1998 | init_waitqueue_head(&cam->smbus_wait); | |
1999 | init_waitqueue_head(&cam->iowait); | |
2000 | cam->pdev = pdev; | |
2001 | cam->pix_format = cafe_def_pix_format; | |
1e426228 | 2002 | cam->mbus_code = cafe_def_mbus_code; |
d905b382 JC |
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 | 2034 | */ |
d905b382 JC |
2035 | ret = cafe_smbus_setup(cam); |
2036 | if (ret) | |
2037 | goto out_freeirq; | |
8bcfd7af HV |
2038 | |
2039 | cam->sensor_addr = 0x42; | |
e6574f2f | 2040 | cam->sensor = v4l2_i2c_new_subdev(&cam->v4l2_dev, &cam->i2c_adapter, |
53dacb15 | 2041 | "ov7670", "ov7670", cam->sensor_addr, NULL); |
8bcfd7af HV |
2042 | if (cam->sensor == NULL) { |
2043 | ret = -ENODEV; | |
2044 | goto out_smbus; | |
2045 | } | |
2046 | ret = cafe_cam_init(cam); | |
2047 | if (ret) | |
2048 | goto out_smbus; | |
2049 | ||
d905b382 JC |
2050 | /* |
2051 | * Get the v4l2 setup done. | |
2052 | */ | |
2053 | mutex_lock(&cam->s_mutex); | |
21508b90 HV |
2054 | cam->vdev = cafe_v4l_template; |
2055 | cam->vdev.debug = 0; | |
2056 | /* cam->vdev.debug = V4L2_DEBUG_IOCTL_ARG;*/ | |
2057 | cam->vdev.v4l2_dev = &cam->v4l2_dev; | |
2058 | ret = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1); | |
d905b382 | 2059 | if (ret) |
0faf6f6b | 2060 | goto out_unlock; |
21508b90 HV |
2061 | video_set_drvdata(&cam->vdev, cam); |
2062 | ||
d905b382 JC |
2063 | /* |
2064 | * If so requested, try to get our DMA buffers now. | |
2065 | */ | |
23869e23 | 2066 | if (!alloc_bufs_at_read) { |
d905b382 JC |
2067 | if (cafe_alloc_dma_bufs(cam, 1)) |
2068 | cam_warn(cam, "Unable to alloc DMA buffers at load" | |
2069 | " will try again later."); | |
2070 | } | |
2071 | ||
d905b382 | 2072 | mutex_unlock(&cam->s_mutex); |
d905b382 JC |
2073 | return 0; |
2074 | ||
0faf6f6b AS |
2075 | out_unlock: |
2076 | mutex_unlock(&cam->s_mutex); | |
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 */ | |
d905b382 JC |
2099 | if (cam->n_sbufs > 0) |
2100 | /* What if they are still mapped? Shouldn't be, but... */ | |
2101 | cafe_free_sio_buffers(cam); | |
d905b382 JC |
2102 | cafe_ctlr_stop_dma(cam); |
2103 | cafe_ctlr_power_down(cam); | |
2104 | cafe_smbus_shutdown(cam); | |
2105 | cafe_free_dma_bufs(cam); | |
2106 | free_irq(cam->pdev->irq, cam); | |
2107 | pci_iounmap(cam->pdev, cam->regs); | |
21508b90 | 2108 | video_unregister_device(&cam->vdev); |
d905b382 JC |
2109 | } |
2110 | ||
2111 | ||
2112 | static void cafe_pci_remove(struct pci_dev *pdev) | |
2113 | { | |
21508b90 HV |
2114 | struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev); |
2115 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
d905b382 JC |
2116 | |
2117 | if (cam == NULL) { | |
d4f60baf | 2118 | printk(KERN_WARNING "pci_remove on unknown pdev %p\n", pdev); |
d905b382 JC |
2119 | return; |
2120 | } | |
2121 | mutex_lock(&cam->s_mutex); | |
2122 | if (cam->users > 0) | |
2123 | cam_warn(cam, "Removing a device with users!\n"); | |
2124 | cafe_shutdown(cam); | |
21508b90 HV |
2125 | v4l2_device_unregister(&cam->v4l2_dev); |
2126 | kfree(cam); | |
d905b382 JC |
2127 | /* No unlock - it no longer exists */ |
2128 | } | |
2129 | ||
2130 | ||
ff68defa JC |
2131 | #ifdef CONFIG_PM |
2132 | /* | |
2133 | * Basic power management. | |
2134 | */ | |
2135 | static int cafe_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2136 | { | |
21508b90 HV |
2137 | struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev); |
2138 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
ff68defa | 2139 | int ret; |
c3034497 | 2140 | enum cafe_state cstate; |
ff68defa JC |
2141 | |
2142 | ret = pci_save_state(pdev); | |
2143 | if (ret) | |
2144 | return ret; | |
c3034497 | 2145 | cstate = cam->state; /* HACK - stop_dma sets to idle */ |
ff68defa JC |
2146 | cafe_ctlr_stop_dma(cam); |
2147 | cafe_ctlr_power_down(cam); | |
2148 | pci_disable_device(pdev); | |
c3034497 | 2149 | cam->state = cstate; |
ff68defa JC |
2150 | return 0; |
2151 | } | |
2152 | ||
2153 | ||
2154 | static int cafe_pci_resume(struct pci_dev *pdev) | |
2155 | { | |
21508b90 HV |
2156 | struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev); |
2157 | struct cafe_camera *cam = to_cam(v4l2_dev); | |
ff68defa JC |
2158 | int ret = 0; |
2159 | ||
2160 | ret = pci_restore_state(pdev); | |
2161 | if (ret) | |
2162 | return ret; | |
12df2f54 | 2163 | ret = pci_enable_device(pdev); |
01659f2a | 2164 | |
12df2f54 TP |
2165 | if (ret) { |
2166 | cam_warn(cam, "Unable to re-enable device on resume!\n"); | |
2167 | return ret; | |
2168 | } | |
ff68defa | 2169 | cafe_ctlr_init(cam); |
01659f2a CB |
2170 | cafe_ctlr_power_down(cam); |
2171 | ||
2172 | mutex_lock(&cam->s_mutex); | |
2173 | if (cam->users > 0) { | |
2174 | cafe_ctlr_power_up(cam); | |
2175 | __cafe_cam_reset(cam); | |
2176 | } | |
2177 | mutex_unlock(&cam->s_mutex); | |
2178 | ||
ff68defa JC |
2179 | set_bit(CF_CONFIG_NEEDED, &cam->flags); |
2180 | if (cam->state == S_SPECREAD) | |
2181 | cam->state = S_IDLE; /* Don't bother restarting */ | |
2182 | else if (cam->state == S_SINGLEREAD || cam->state == S_STREAMING) | |
2183 | ret = cafe_read_setup(cam, cam->state); | |
2184 | return ret; | |
2185 | } | |
2186 | ||
2187 | #endif /* CONFIG_PM */ | |
d905b382 JC |
2188 | |
2189 | ||
2190 | static struct pci_device_id cafe_ids[] = { | |
aa7a7fb3 DW |
2191 | { PCI_DEVICE(PCI_VENDOR_ID_MARVELL, |
2192 | PCI_DEVICE_ID_MARVELL_88ALP01_CCIC) }, | |
d905b382 JC |
2193 | { 0, } |
2194 | }; | |
2195 | ||
2196 | MODULE_DEVICE_TABLE(pci, cafe_ids); | |
2197 | ||
2198 | static struct pci_driver cafe_pci_driver = { | |
2199 | .name = "cafe1000-ccic", | |
2200 | .id_table = cafe_ids, | |
2201 | .probe = cafe_pci_probe, | |
2202 | .remove = cafe_pci_remove, | |
ff68defa JC |
2203 | #ifdef CONFIG_PM |
2204 | .suspend = cafe_pci_suspend, | |
2205 | .resume = cafe_pci_resume, | |
2206 | #endif | |
d905b382 JC |
2207 | }; |
2208 | ||
2209 | ||
2210 | ||
2211 | ||
2212 | static int __init cafe_init(void) | |
2213 | { | |
2214 | int ret; | |
2215 | ||
2216 | printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n", | |
2217 | CAFE_VERSION); | |
d905b382 JC |
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 | } | |
d905b382 JC |
2223 | ret = 0; |
2224 | ||
2225 | out: | |
2226 | return ret; | |
2227 | } | |
2228 | ||
2229 | ||
2230 | static void __exit cafe_exit(void) | |
2231 | { | |
2232 | pci_unregister_driver(&cafe_pci_driver); | |
d905b382 JC |
2233 | } |
2234 | ||
2235 | module_init(cafe_init); | |
2236 | module_exit(cafe_exit); |