Commit | Line | Data |
---|---|---|
a6c2ba28 | 1 | /* |
3acf2809 | 2 | em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices |
a6c2ba28 | 3 | |
f7abcd38 MCC |
4 | Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> |
5 | Markus Rechberger <mrechberger@gmail.com> | |
2e7c6dc3 | 6 | Mauro Carvalho Chehab <mchehab@infradead.org> |
f7abcd38 | 7 | Sascha Sommer <saschasommer@freenet.de> |
a6c2ba28 AM |
8 | |
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | #include <linux/init.h> | |
25 | #include <linux/list.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
a6c2ba28 AM |
28 | #include <linux/usb.h> |
29 | #include <linux/vmalloc.h> | |
30 | ||
f7abcd38 | 31 | #include "em28xx.h" |
a6c2ba28 AM |
32 | |
33 | /* #define ENABLE_DEBUG_ISOC_FRAMES */ | |
34 | ||
d21838dd | 35 | static unsigned int core_debug = 0; |
a6c2ba28 AM |
36 | module_param(core_debug,int,0644); |
37 | MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); | |
38 | ||
3acf2809 | 39 | #define em28xx_coredbg(fmt, arg...) do {\ |
4ac97914 MCC |
40 | if (core_debug) \ |
41 | printk(KERN_INFO "%s %s :"fmt, \ | |
f85c657f | 42 | dev->name, __FUNCTION__ , ##arg); } while (0) |
a6c2ba28 | 43 | |
d21838dd | 44 | static unsigned int reg_debug = 0; |
a6c2ba28 AM |
45 | module_param(reg_debug,int,0644); |
46 | MODULE_PARM_DESC(reg_debug,"enable debug messages [URB reg]"); | |
47 | ||
3acf2809 | 48 | #define em28xx_regdbg(fmt, arg...) do {\ |
4ac97914 MCC |
49 | if (reg_debug) \ |
50 | printk(KERN_INFO "%s %s :"fmt, \ | |
f85c657f | 51 | dev->name, __FUNCTION__ , ##arg); } while (0) |
a6c2ba28 | 52 | |
d21838dd | 53 | static unsigned int isoc_debug = 0; |
a6c2ba28 | 54 | module_param(isoc_debug,int,0644); |
55b8b2d1 | 55 | MODULE_PARM_DESC(isoc_debug,"enable debug messages [isoc transfers]"); |
a6c2ba28 | 56 | |
3acf2809 | 57 | #define em28xx_isocdbg(fmt, arg...) do {\ |
4ac97914 MCC |
58 | if (isoc_debug) \ |
59 | printk(KERN_INFO "%s %s :"fmt, \ | |
f85c657f | 60 | dev->name, __FUNCTION__ , ##arg); } while (0) |
a6c2ba28 | 61 | |
3acf2809 | 62 | static int alt = EM28XX_PINOUT; |
a6c2ba28 AM |
63 | module_param(alt, int, 0644); |
64 | MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); | |
65 | ||
674434c6 | 66 | |
a6c2ba28 | 67 | /* |
3acf2809 | 68 | * em28xx_request_buffers() |
a6c2ba28 AM |
69 | * allocate a number of buffers |
70 | */ | |
3acf2809 | 71 | u32 em28xx_request_buffers(struct em28xx *dev, u32 count) |
a6c2ba28 AM |
72 | { |
73 | const size_t imagesize = PAGE_ALIGN(dev->frame_size); /*needs to be page aligned cause the buffers can be mapped individually! */ | |
74 | void *buff = NULL; | |
75 | u32 i; | |
e8efb71d | 76 | em28xx_coredbg("requested %i buffers with size %zi", count, imagesize); |
3acf2809 MCC |
77 | if (count > EM28XX_NUM_FRAMES) |
78 | count = EM28XX_NUM_FRAMES; | |
a6c2ba28 AM |
79 | |
80 | dev->num_frames = count; | |
81 | while (dev->num_frames > 0) { | |
3639c861 SS |
82 | if ((buff = vmalloc_32(dev->num_frames * imagesize))) { |
83 | memset(buff, 0, dev->num_frames * imagesize); | |
a6c2ba28 | 84 | break; |
3639c861 | 85 | } |
a6c2ba28 AM |
86 | dev->num_frames--; |
87 | } | |
88 | ||
89 | for (i = 0; i < dev->num_frames; i++) { | |
90 | dev->frame[i].bufmem = buff + i * imagesize; | |
91 | dev->frame[i].buf.index = i; | |
92 | dev->frame[i].buf.m.offset = i * imagesize; | |
93 | dev->frame[i].buf.length = dev->frame_size; | |
94 | dev->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
95 | dev->frame[i].buf.sequence = 0; | |
96 | dev->frame[i].buf.field = V4L2_FIELD_NONE; | |
97 | dev->frame[i].buf.memory = V4L2_MEMORY_MMAP; | |
98 | dev->frame[i].buf.flags = 0; | |
99 | } | |
100 | return dev->num_frames; | |
101 | } | |
102 | ||
103 | /* | |
3acf2809 | 104 | * em28xx_queue_unusedframes() |
a6c2ba28 AM |
105 | * add all frames that are not currently in use to the inbuffer queue |
106 | */ | |
3acf2809 | 107 | void em28xx_queue_unusedframes(struct em28xx *dev) |
a6c2ba28 AM |
108 | { |
109 | unsigned long lock_flags; | |
110 | u32 i; | |
111 | ||
112 | for (i = 0; i < dev->num_frames; i++) | |
113 | if (dev->frame[i].state == F_UNUSED) { | |
114 | dev->frame[i].state = F_QUEUED; | |
115 | spin_lock_irqsave(&dev->queue_lock, lock_flags); | |
116 | list_add_tail(&dev->frame[i].frame, &dev->inqueue); | |
117 | spin_unlock_irqrestore(&dev->queue_lock, lock_flags); | |
118 | } | |
119 | } | |
120 | ||
121 | /* | |
3acf2809 | 122 | * em28xx_release_buffers() |
a6c2ba28 AM |
123 | * free frame buffers |
124 | */ | |
3acf2809 | 125 | void em28xx_release_buffers(struct em28xx *dev) |
a6c2ba28 AM |
126 | { |
127 | if (dev->num_frames) { | |
3639c861 | 128 | vfree(dev->frame[0].bufmem); |
a6c2ba28 AM |
129 | dev->num_frames = 0; |
130 | } | |
131 | } | |
132 | ||
133 | /* | |
3acf2809 | 134 | * em28xx_read_reg_req() |
a6c2ba28 AM |
135 | * reads data from the usb device specifying bRequest |
136 | */ | |
3acf2809 | 137 | int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg, |
a6c2ba28 AM |
138 | char *buf, int len) |
139 | { | |
140 | int ret, byte; | |
141 | ||
9f38724a MR |
142 | if (dev->state & DEV_DISCONNECTED) |
143 | return(-ENODEV); | |
144 | ||
3acf2809 | 145 | em28xx_regdbg("req=%02x, reg=%02x ", req, reg); |
a6c2ba28 AM |
146 | |
147 | ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, | |
148 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
149 | 0x0000, reg, buf, len, HZ); | |
150 | ||
151 | if (reg_debug){ | |
152 | printk(ret < 0 ? " failed!\n" : "%02x values: ", ret); | |
153 | for (byte = 0; byte < len; byte++) { | |
154 | printk(" %02x", buf[byte]); | |
155 | } | |
156 | printk("\n"); | |
157 | } | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
162 | /* | |
3acf2809 | 163 | * em28xx_read_reg_req() |
a6c2ba28 AM |
164 | * reads data from the usb device specifying bRequest |
165 | */ | |
3acf2809 | 166 | int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg) |
a6c2ba28 AM |
167 | { |
168 | u8 val; | |
169 | int ret; | |
170 | ||
9f38724a MR |
171 | if (dev->state & DEV_DISCONNECTED) |
172 | return(-ENODEV); | |
173 | ||
3acf2809 | 174 | em28xx_regdbg("req=%02x, reg=%02x:", req, reg); |
a6c2ba28 AM |
175 | |
176 | ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, | |
177 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
178 | 0x0000, reg, &val, 1, HZ); | |
179 | ||
180 | if (reg_debug) | |
181 | printk(ret < 0 ? " failed!\n" : "%02x\n", val); | |
182 | ||
183 | if (ret < 0) | |
184 | return ret; | |
185 | ||
186 | return val; | |
187 | } | |
188 | ||
3acf2809 | 189 | int em28xx_read_reg(struct em28xx *dev, u16 reg) |
a6c2ba28 | 190 | { |
3acf2809 | 191 | return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg); |
a6c2ba28 AM |
192 | } |
193 | ||
194 | /* | |
3acf2809 | 195 | * em28xx_write_regs_req() |
a6c2ba28 AM |
196 | * sends data to the usb device, specifying bRequest |
197 | */ | |
3acf2809 | 198 | int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, |
a6c2ba28 AM |
199 | int len) |
200 | { | |
201 | int ret; | |
202 | ||
203 | /*usb_control_msg seems to expect a kmalloced buffer */ | |
9f38724a MR |
204 | unsigned char *bufs; |
205 | ||
206 | if (dev->state & DEV_DISCONNECTED) | |
207 | return(-ENODEV); | |
208 | ||
209 | bufs = kmalloc(len, GFP_KERNEL); | |
a6c2ba28 | 210 | |
3acf2809 | 211 | em28xx_regdbg("req=%02x reg=%02x:", req, reg); |
a6c2ba28 AM |
212 | |
213 | if (reg_debug) { | |
214 | int i; | |
215 | for (i = 0; i < len; ++i) | |
216 | printk (" %02x", (unsigned char)buf[i]); | |
217 | printk ("\n"); | |
218 | } | |
219 | ||
220 | if (!bufs) | |
221 | return -ENOMEM; | |
222 | memcpy(bufs, buf, len); | |
223 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req, | |
224 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
225 | 0x0000, reg, bufs, len, HZ); | |
9f38724a | 226 | msleep(5); /* FIXME: magic number */ |
a6c2ba28 AM |
227 | kfree(bufs); |
228 | return ret; | |
229 | } | |
230 | ||
3acf2809 | 231 | int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len) |
a6c2ba28 | 232 | { |
3acf2809 | 233 | return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); |
a6c2ba28 AM |
234 | } |
235 | ||
236 | /* | |
3acf2809 | 237 | * em28xx_write_reg_bits() |
a6c2ba28 AM |
238 | * sets only some bits (specified by bitmask) of a register, by first reading |
239 | * the actual value | |
240 | */ | |
3acf2809 | 241 | int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val, |
a6c2ba28 AM |
242 | u8 bitmask) |
243 | { | |
244 | int oldval; | |
245 | u8 newval; | |
3acf2809 | 246 | if ((oldval = em28xx_read_reg(dev, reg)) < 0) |
a6c2ba28 AM |
247 | return oldval; |
248 | newval = (((u8) oldval) & ~bitmask) | (val & bitmask); | |
3acf2809 | 249 | return em28xx_write_regs(dev, reg, &newval, 1); |
a6c2ba28 AM |
250 | } |
251 | ||
252 | /* | |
3acf2809 | 253 | * em28xx_write_ac97() |
a6c2ba28 AM |
254 | * write a 16 bit value to the specified AC97 address (LSB first!) |
255 | */ | |
3acf2809 | 256 | int em28xx_write_ac97(struct em28xx *dev, u8 reg, u8 * val) |
a6c2ba28 AM |
257 | { |
258 | int ret; | |
259 | u8 addr = reg & 0x7f; | |
3acf2809 | 260 | if ((ret = em28xx_write_regs(dev, AC97LSB_REG, val, 2)) < 0) |
a6c2ba28 | 261 | return ret; |
3acf2809 | 262 | if ((ret = em28xx_write_regs(dev, AC97ADDR_REG, &addr, 1)) < 0) |
a6c2ba28 | 263 | return ret; |
3acf2809 | 264 | if ((ret = em28xx_read_reg(dev, AC97BUSY_REG)) < 0) |
a6c2ba28 AM |
265 | return ret; |
266 | else if (((u8) ret) & 0x01) { | |
3875818f | 267 | em28xx_warn ("AC97 command still being executed: not handled properly!\n"); |
a6c2ba28 AM |
268 | } |
269 | return 0; | |
270 | } | |
271 | ||
3acf2809 | 272 | int em28xx_audio_analog_set(struct em28xx *dev) |
a6c2ba28 AM |
273 | { |
274 | char s[2] = { 0x00, 0x00 }; | |
275 | s[0] |= 0x1f - dev->volume; | |
276 | s[1] |= 0x1f - dev->volume; | |
277 | if (dev->mute) | |
278 | s[1] |= 0x80; | |
3acf2809 | 279 | return em28xx_write_ac97(dev, MASTER_AC97, s); |
a6c2ba28 AM |
280 | } |
281 | ||
282 | ||
3acf2809 | 283 | int em28xx_colorlevels_set_default(struct em28xx *dev) |
a6c2ba28 | 284 | { |
3acf2809 MCC |
285 | em28xx_write_regs(dev, YGAIN_REG, "\x10", 1); /* contrast */ |
286 | em28xx_write_regs(dev, YOFFSET_REG, "\x00", 1); /* brightness */ | |
287 | em28xx_write_regs(dev, UVGAIN_REG, "\x10", 1); /* saturation */ | |
288 | em28xx_write_regs(dev, UOFFSET_REG, "\x00", 1); | |
289 | em28xx_write_regs(dev, VOFFSET_REG, "\x00", 1); | |
290 | em28xx_write_regs(dev, SHARPNESS_REG, "\x00", 1); | |
291 | ||
292 | em28xx_write_regs(dev, GAMMA_REG, "\x20", 1); | |
293 | em28xx_write_regs(dev, RGAIN_REG, "\x20", 1); | |
294 | em28xx_write_regs(dev, GGAIN_REG, "\x20", 1); | |
295 | em28xx_write_regs(dev, BGAIN_REG, "\x20", 1); | |
296 | em28xx_write_regs(dev, ROFFSET_REG, "\x00", 1); | |
297 | em28xx_write_regs(dev, GOFFSET_REG, "\x00", 1); | |
298 | return em28xx_write_regs(dev, BOFFSET_REG, "\x00", 1); | |
a6c2ba28 AM |
299 | } |
300 | ||
3acf2809 | 301 | int em28xx_capture_start(struct em28xx *dev, int start) |
a6c2ba28 AM |
302 | { |
303 | int ret; | |
304 | /* FIXME: which is the best order? */ | |
305 | /* video registers are sampled by VREF */ | |
3acf2809 | 306 | if ((ret = em28xx_write_reg_bits(dev, USBSUSP_REG, start ? 0x10 : 0x00, |
a6c2ba28 AM |
307 | 0x10)) < 0) |
308 | return ret; | |
309 | /* enable video capture */ | |
3acf2809 | 310 | return em28xx_write_regs(dev, VINENABLE_REG, start ? "\x67" : "\x27", 1); |
a6c2ba28 AM |
311 | } |
312 | ||
3acf2809 | 313 | int em28xx_outfmt_set_yuv422(struct em28xx *dev) |
a6c2ba28 | 314 | { |
3acf2809 MCC |
315 | em28xx_write_regs(dev, OUTFMT_REG, "\x34", 1); |
316 | em28xx_write_regs(dev, VINMODE_REG, "\x10", 1); | |
317 | return em28xx_write_regs(dev, VINCTRL_REG, "\x11", 1); | |
a6c2ba28 AM |
318 | } |
319 | ||
adcb0fa2 AB |
320 | static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, |
321 | u8 ymin, u8 ymax) | |
a6c2ba28 | 322 | { |
3acf2809 | 323 | em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n", xmin, ymin, xmax, ymax); |
a6c2ba28 | 324 | |
3acf2809 MCC |
325 | em28xx_write_regs(dev, XMIN_REG, &xmin, 1); |
326 | em28xx_write_regs(dev, XMAX_REG, &xmax, 1); | |
327 | em28xx_write_regs(dev, YMIN_REG, &ymin, 1); | |
328 | return em28xx_write_regs(dev, YMAX_REG, &ymax, 1); | |
a6c2ba28 AM |
329 | } |
330 | ||
adcb0fa2 | 331 | static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, |
a6c2ba28 AM |
332 | u16 width, u16 height) |
333 | { | |
334 | u8 cwidth = width; | |
335 | u8 cheight = height; | |
336 | u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01); | |
337 | ||
3acf2809 | 338 | em28xx_coredbg("em28xx Area Set: (%d,%d)\n", (width | (overflow & 2) << 7), |
a6c2ba28 AM |
339 | (height | (overflow & 1) << 8)); |
340 | ||
3acf2809 MCC |
341 | em28xx_write_regs(dev, HSTART_REG, &hstart, 1); |
342 | em28xx_write_regs(dev, VSTART_REG, &vstart, 1); | |
343 | em28xx_write_regs(dev, CWIDTH_REG, &cwidth, 1); | |
344 | em28xx_write_regs(dev, CHEIGHT_REG, &cheight, 1); | |
345 | return em28xx_write_regs(dev, OFLOW_REG, &overflow, 1); | |
a6c2ba28 AM |
346 | } |
347 | ||
adcb0fa2 | 348 | static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) |
a6c2ba28 | 349 | { |
52c02fcd SS |
350 | u8 mode; |
351 | /* the em2800 scaler only supports scaling down to 50% */ | |
352 | if(dev->is_em2800) | |
353 | mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); | |
354 | else { | |
355 | u8 buf[2]; | |
356 | buf[0] = h; | |
357 | buf[1] = h >> 8; | |
3acf2809 | 358 | em28xx_write_regs(dev, HSCALELOW_REG, (char *)buf, 2); |
52c02fcd SS |
359 | buf[0] = v; |
360 | buf[1] = v >> 8; | |
3acf2809 | 361 | em28xx_write_regs(dev, VSCALELOW_REG, (char *)buf, 2); |
52c02fcd SS |
362 | /* it seems that both H and V scalers must be active to work correctly */ |
363 | mode = (h || v)? 0x30: 0x00; | |
74458e6c | 364 | } |
3acf2809 | 365 | return em28xx_write_reg_bits(dev, COMPR_REG, mode, 0x30); |
a6c2ba28 AM |
366 | } |
367 | ||
368 | /* FIXME: this only function read values from dev */ | |
3acf2809 | 369 | int em28xx_resolution_set(struct em28xx *dev) |
a6c2ba28 AM |
370 | { |
371 | int width, height; | |
372 | width = norm_maxw(dev); | |
373 | height = norm_maxh(dev) >> 1; | |
374 | ||
3acf2809 MCC |
375 | em28xx_outfmt_set_yuv422(dev); |
376 | em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); | |
377 | em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2); | |
378 | return em28xx_scaler_set(dev, dev->hscale, dev->vscale); | |
a6c2ba28 AM |
379 | } |
380 | ||
381 | ||
382 | /******************* isoc transfer handling ****************************/ | |
383 | ||
384 | #ifdef ENABLE_DEBUG_ISOC_FRAMES | |
7d12e780 | 385 | static void em28xx_isoc_dump(struct urb *urb) |
a6c2ba28 AM |
386 | { |
387 | int len = 0; | |
388 | int ntrans = 0; | |
389 | int i; | |
390 | ||
391 | printk(KERN_DEBUG "isocIrq: sf=%d np=%d ec=%x\n", | |
392 | urb->start_frame, urb->number_of_packets, | |
393 | urb->error_count); | |
394 | for (i = 0; i < urb->number_of_packets; i++) { | |
395 | unsigned char *buf = | |
396 | urb->transfer_buffer + | |
397 | urb->iso_frame_desc[i].offset; | |
398 | int alen = urb->iso_frame_desc[i].actual_length; | |
399 | if (alen > 0) { | |
400 | if (buf[0] == 0x88) { | |
401 | ntrans++; | |
402 | len += alen; | |
403 | } else if (buf[0] == 0x22) { | |
404 | printk(KERN_DEBUG | |
405 | "= l=%d nt=%d bpp=%d\n", | |
406 | len - 4 * ntrans, ntrans, | |
407 | ntrans == 0 ? 0 : len / ntrans); | |
408 | ntrans = 1; | |
409 | len = alen; | |
410 | } else | |
411 | printk(KERN_DEBUG "!\n"); | |
412 | } | |
413 | printk(KERN_DEBUG " n=%d s=%d al=%d %x\n", i, | |
414 | urb->iso_frame_desc[i].status, | |
415 | urb->iso_frame_desc[i].actual_length, | |
416 | (unsigned int) | |
417 | *((unsigned char *)(urb->transfer_buffer + | |
418 | urb->iso_frame_desc[i]. | |
419 | offset))); | |
420 | } | |
421 | } | |
422 | #endif | |
423 | ||
3acf2809 | 424 | static inline int em28xx_isoc_video(struct em28xx *dev,struct em28xx_frame_t **f, |
a6c2ba28 AM |
425 | unsigned long *lock_flags, unsigned char buf) |
426 | { | |
427 | if (!(buf & 0x01)) { | |
428 | if ((*f)->state == F_GRABBING) { | |
429 | /*previous frame is incomplete */ | |
430 | if ((*f)->fieldbytesused < dev->field_size) { | |
431 | (*f)->state = F_ERROR; | |
3acf2809 | 432 | em28xx_isocdbg ("dropping incomplete bottom field (%i missing bytes)", |
a6c2ba28 AM |
433 | dev->field_size-(*f)->fieldbytesused); |
434 | } else { | |
435 | (*f)->state = F_DONE; | |
436 | (*f)->buf.bytesused = dev->frame_size; | |
437 | } | |
438 | } | |
439 | if ((*f)->state == F_DONE || (*f)->state == F_ERROR) { | |
440 | /* move current frame to outqueue and get next free buffer from inqueue */ | |
441 | spin_lock_irqsave(&dev-> queue_lock, *lock_flags); | |
442 | list_move_tail(&(*f)->frame, &dev->outqueue); | |
443 | if (!list_empty(&dev->inqueue)) | |
444 | (*f) = list_entry(dev-> inqueue.next, | |
3acf2809 | 445 | struct em28xx_frame_t,frame); |
a6c2ba28 AM |
446 | else |
447 | (*f) = NULL; | |
448 | spin_unlock_irqrestore(&dev->queue_lock,*lock_flags); | |
449 | } | |
450 | if (!(*f)) { | |
3acf2809 | 451 | em28xx_isocdbg ("new frame but no buffer is free"); |
a6c2ba28 AM |
452 | return -1; |
453 | } | |
454 | do_gettimeofday(&(*f)->buf.timestamp); | |
455 | (*f)->buf.sequence = ++dev->frame_count; | |
456 | (*f)->buf.field = V4L2_FIELD_INTERLACED; | |
457 | (*f)->state = F_GRABBING; | |
458 | (*f)->buf.bytesused = 0; | |
459 | (*f)->top_field = 1; | |
460 | (*f)->fieldbytesused = 0; | |
461 | } else { | |
462 | /* acquiring bottom field */ | |
463 | if ((*f)->state == F_GRABBING) { | |
464 | if (!(*f)->top_field) { | |
465 | (*f)->state = F_ERROR; | |
3acf2809 | 466 | em28xx_isocdbg ("unexpected begin of bottom field; discarding it"); |
a6c2ba28 AM |
467 | } else if ((*f)-> fieldbytesused < dev->field_size - 172) { |
468 | (*f)->state = F_ERROR; | |
3acf2809 | 469 | em28xx_isocdbg ("dropping incomplete top field (%i missing bytes)", |
a6c2ba28 AM |
470 | dev->field_size-(*f)->fieldbytesused); |
471 | } else { | |
472 | (*f)->top_field = 0; | |
473 | (*f)->fieldbytesused = 0; | |
474 | } | |
475 | } | |
476 | } | |
477 | return (0); | |
478 | } | |
479 | ||
3acf2809 MCC |
480 | static inline void em28xx_isoc_video_copy(struct em28xx *dev, |
481 | struct em28xx_frame_t **f, unsigned char *buf, int len) | |
a6c2ba28 AM |
482 | { |
483 | void *fieldstart, *startwrite, *startread; | |
484 | int linesdone, currlinedone, offset, lencopy,remain; | |
485 | ||
596d92d5 | 486 | if(dev->frame_size != (*f)->buf.length){ |
3acf2809 | 487 | em28xx_err("frame_size %i and buf.length %i are different!!!\n",dev->frame_size,(*f)->buf.length); |
596d92d5 MCC |
488 | return; |
489 | } | |
490 | ||
a6c2ba28 AM |
491 | if ((*f)->fieldbytesused + len > dev->field_size) |
492 | len =dev->field_size - (*f)->fieldbytesused; | |
feff0485 MCC |
493 | |
494 | if (buf[0] != 0x88 && buf[0] != 0x22) { | |
3acf2809 | 495 | em28xx_isocdbg("frame is not complete\n"); |
feff0485 MCC |
496 | startread = buf; |
497 | len+=4; | |
498 | } else | |
499 | startread = buf + 4; | |
500 | ||
a6c2ba28 | 501 | remain = len; |
feff0485 | 502 | |
a6c2ba28 AM |
503 | if ((*f)->top_field) |
504 | fieldstart = (*f)->bufmem; | |
505 | else | |
506 | fieldstart = (*f)->bufmem + dev->bytesperline; | |
507 | ||
508 | linesdone = (*f)->fieldbytesused / dev->bytesperline; | |
509 | currlinedone = (*f)->fieldbytesused % dev->bytesperline; | |
510 | offset = linesdone * dev->bytesperline * 2 + currlinedone; | |
511 | startwrite = fieldstart + offset; | |
512 | lencopy = dev->bytesperline - currlinedone; | |
513 | lencopy = lencopy > remain ? remain : lencopy; | |
514 | ||
515 | memcpy(startwrite, startread, lencopy); | |
516 | remain -= lencopy; | |
517 | ||
518 | while (remain > 0) { | |
519 | startwrite += lencopy + dev->bytesperline; | |
520 | startread += lencopy; | |
521 | if (dev->bytesperline > remain) | |
522 | lencopy = remain; | |
523 | else | |
524 | lencopy = dev->bytesperline; | |
525 | ||
526 | memcpy(startwrite, startread, lencopy); | |
527 | remain -= lencopy; | |
528 | } | |
529 | ||
530 | (*f)->fieldbytesused += len; | |
531 | } | |
532 | ||
533 | /* | |
3acf2809 | 534 | * em28xx_isoIrq() |
a6c2ba28 AM |
535 | * handles the incoming isoc urbs and fills the frames from our inqueue |
536 | */ | |
7d12e780 | 537 | static void em28xx_isocIrq(struct urb *urb) |
a6c2ba28 | 538 | { |
3acf2809 | 539 | struct em28xx *dev = urb->context; |
a6c2ba28 | 540 | int i, status; |
3acf2809 | 541 | struct em28xx_frame_t **f; |
a6c2ba28 AM |
542 | unsigned long lock_flags; |
543 | ||
544 | if (!dev) | |
545 | return; | |
546 | #ifdef ENABLE_DEBUG_ISOC_FRAMES | |
547 | if (isoc_debug>1) | |
7d12e780 | 548 | em28xx_isoc_dump(urb); |
a6c2ba28 AM |
549 | #endif |
550 | ||
551 | if (urb->status == -ENOENT) | |
552 | return; | |
553 | ||
554 | f = &dev->frame_current; | |
555 | ||
556 | if (dev->stream == STREAM_INTERRUPT) { | |
557 | dev->stream = STREAM_OFF; | |
558 | if ((*f)) | |
559 | (*f)->state = F_QUEUED; | |
3acf2809 | 560 | em28xx_isocdbg("stream interrupted"); |
a6c2ba28 AM |
561 | wake_up_interruptible(&dev->wait_stream); |
562 | } | |
563 | ||
564 | if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) | |
565 | return; | |
566 | ||
567 | if (dev->stream == STREAM_ON && !list_empty(&dev->inqueue)) { | |
568 | if (!(*f)) | |
569 | (*f) = list_entry(dev->inqueue.next, | |
3acf2809 | 570 | struct em28xx_frame_t, frame); |
a6c2ba28 AM |
571 | |
572 | for (i = 0; i < urb->number_of_packets; i++) { | |
573 | unsigned char *buf = urb->transfer_buffer + | |
574 | urb->iso_frame_desc[i].offset; | |
575 | int len = urb->iso_frame_desc[i].actual_length - 4; | |
576 | ||
577 | if (urb->iso_frame_desc[i].status) { | |
3acf2809 | 578 | em28xx_isocdbg("data error: [%d] len=%d, status=%d", i, |
a6c2ba28 AM |
579 | urb->iso_frame_desc[i].actual_length, |
580 | urb->iso_frame_desc[i].status); | |
feff0485 MCC |
581 | if (urb->iso_frame_desc[i].status != -EPROTO) |
582 | continue; | |
a6c2ba28 AM |
583 | } |
584 | if (urb->iso_frame_desc[i].actual_length <= 0) { | |
3acf2809 | 585 | em28xx_isocdbg("packet %d is empty",i); |
a6c2ba28 AM |
586 | continue; |
587 | } | |
588 | if (urb->iso_frame_desc[i].actual_length > | |
589 | dev->max_pkt_size) { | |
3acf2809 | 590 | em28xx_isocdbg("packet bigger than packet size"); |
a6c2ba28 AM |
591 | continue; |
592 | } | |
593 | /*new frame */ | |
594 | if (buf[0] == 0x22 && buf[1] == 0x5a) { | |
3acf2809 | 595 | em28xx_isocdbg("Video frame, length=%i!",len); |
a6c2ba28 | 596 | |
3acf2809 | 597 | if (em28xx_isoc_video(dev,f,&lock_flags,buf[2])) |
a6c2ba28 AM |
598 | break; |
599 | } else if (buf[0]==0x33 && buf[1]==0x95 && buf[2]==0x00) { | |
3acf2809 | 600 | em28xx_isocdbg("VBI HEADER!!!"); |
a6c2ba28 AM |
601 | } |
602 | ||
603 | /* actual copying */ | |
604 | if ((*f)->state == F_GRABBING) { | |
3acf2809 | 605 | em28xx_isoc_video_copy(dev,f,buf, len); |
a6c2ba28 AM |
606 | } |
607 | } | |
608 | } | |
609 | ||
610 | for (i = 0; i < urb->number_of_packets; i++) { | |
611 | urb->iso_frame_desc[i].status = 0; | |
612 | urb->iso_frame_desc[i].actual_length = 0; | |
613 | } | |
614 | ||
615 | urb->status = 0; | |
616 | if ((status = usb_submit_urb(urb, GFP_ATOMIC))) { | |
3acf2809 | 617 | em28xx_errdev("resubmit of urb failed (error=%i)\n", status); |
a6c2ba28 AM |
618 | dev->state |= DEV_MISCONFIGURED; |
619 | } | |
620 | wake_up_interruptible(&dev->wait_frame); | |
621 | return; | |
622 | } | |
623 | ||
624 | /* | |
3acf2809 MCC |
625 | * em28xx_uninit_isoc() |
626 | * deallocates the buffers and urbs allocated during em28xx_init_iosc() | |
a6c2ba28 | 627 | */ |
3acf2809 | 628 | void em28xx_uninit_isoc(struct em28xx *dev) |
a6c2ba28 AM |
629 | { |
630 | int i; | |
631 | ||
3acf2809 | 632 | for (i = 0; i < EM28XX_NUM_BUFS; i++) { |
a6c2ba28 AM |
633 | if (dev->urb[i]) { |
634 | usb_kill_urb(dev->urb[i]); | |
02f74273 | 635 | if (dev->transfer_buffer[i]){ |
3acf2809 | 636 | usb_buffer_free(dev->udev,(EM28XX_NUM_PACKETS*dev->max_pkt_size),dev->transfer_buffer[i],dev->urb[i]->transfer_dma); |
02f74273 | 637 | } |
a6c2ba28 AM |
638 | usb_free_urb(dev->urb[i]); |
639 | } | |
640 | dev->urb[i] = NULL; | |
a6c2ba28 AM |
641 | dev->transfer_buffer[i] = NULL; |
642 | } | |
3acf2809 | 643 | em28xx_capture_start(dev, 0); |
a6c2ba28 AM |
644 | } |
645 | ||
646 | /* | |
3acf2809 | 647 | * em28xx_init_isoc() |
a6c2ba28 AM |
648 | * allocates transfer buffers and submits the urbs for isoc transfer |
649 | */ | |
3acf2809 | 650 | int em28xx_init_isoc(struct em28xx *dev) |
a6c2ba28 AM |
651 | { |
652 | /* change interface to 3 which allowes the biggest packet sizes */ | |
653 | int i, errCode; | |
3acf2809 | 654 | const int sb_size = EM28XX_NUM_PACKETS * dev->max_pkt_size; |
a6c2ba28 AM |
655 | |
656 | /* reset streaming vars */ | |
657 | dev->frame_current = NULL; | |
658 | dev->frame_count = 0; | |
659 | ||
660 | /* allocate urbs */ | |
3acf2809 | 661 | for (i = 0; i < EM28XX_NUM_BUFS; i++) { |
a6c2ba28 AM |
662 | struct urb *urb; |
663 | int j, k; | |
664 | /* allocate transfer buffer */ | |
3acf2809 | 665 | urb = usb_alloc_urb(EM28XX_NUM_PACKETS, GFP_KERNEL); |
02f74273 | 666 | if (!urb){ |
3acf2809 MCC |
667 | em28xx_errdev("cannot alloc urb %i\n", i); |
668 | em28xx_uninit_isoc(dev); | |
02f74273 MR |
669 | return -ENOMEM; |
670 | } | |
671 | dev->transfer_buffer[i] = usb_buffer_alloc(dev->udev, sb_size, GFP_KERNEL,&urb->transfer_dma); | |
a6c2ba28 | 672 | if (!dev->transfer_buffer[i]) { |
3acf2809 | 673 | em28xx_errdev |
a6c2ba28 AM |
674 | ("unable to allocate %i bytes for transfer buffer %i\n", |
675 | sb_size, i); | |
3acf2809 | 676 | em28xx_uninit_isoc(dev); |
a6c2ba28 AM |
677 | return -ENOMEM; |
678 | } | |
679 | memset(dev->transfer_buffer[i], 0, sb_size); | |
02f74273 MR |
680 | urb->dev = dev->udev; |
681 | urb->context = dev; | |
682 | urb->pipe = usb_rcvisocpipe(dev->udev, 0x82); | |
683 | urb->transfer_flags = URB_ISO_ASAP; | |
684 | urb->interval = 1; | |
685 | urb->transfer_buffer = dev->transfer_buffer[i]; | |
3acf2809 MCC |
686 | urb->complete = em28xx_isocIrq; |
687 | urb->number_of_packets = EM28XX_NUM_PACKETS; | |
02f74273 | 688 | urb->transfer_buffer_length = sb_size; |
3acf2809 | 689 | for (j = k = 0; j < EM28XX_NUM_PACKETS; |
02f74273 MR |
690 | j++, k += dev->max_pkt_size) { |
691 | urb->iso_frame_desc[j].offset = k; | |
692 | urb->iso_frame_desc[j].length = | |
693 | dev->max_pkt_size; | |
a6c2ba28 | 694 | } |
02f74273 | 695 | dev->urb[i] = urb; |
a6c2ba28 AM |
696 | } |
697 | ||
698 | /* submit urbs */ | |
3acf2809 | 699 | for (i = 0; i < EM28XX_NUM_BUFS; i++) { |
a6c2ba28 AM |
700 | errCode = usb_submit_urb(dev->urb[i], GFP_KERNEL); |
701 | if (errCode) { | |
3acf2809 | 702 | em28xx_errdev("submit of urb %i failed (error=%i)\n", i, |
a6c2ba28 | 703 | errCode); |
3acf2809 | 704 | em28xx_uninit_isoc(dev); |
a6c2ba28 AM |
705 | return errCode; |
706 | } | |
707 | } | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
3acf2809 | 712 | int em28xx_set_alternate(struct em28xx *dev) |
a6c2ba28 AM |
713 | { |
714 | int errCode, prev_alt = dev->alt; | |
715 | dev->alt = alt; | |
716 | if (dev->alt == 0) { | |
717 | int i; | |
9d4d9c05 | 718 | for(i=0;i< dev->num_alt; i++) |
eac94356 MCC |
719 | if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->alt]) |
720 | dev->alt=i; | |
a6c2ba28 AM |
721 | } |
722 | ||
723 | if (dev->alt != prev_alt) { | |
724 | dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; | |
9d4d9c05 | 725 | em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n", dev->alt, |
a6c2ba28 AM |
726 | dev->max_pkt_size); |
727 | errCode = usb_set_interface(dev->udev, 0, dev->alt); | |
728 | if (errCode < 0) { | |
9d4d9c05 MCC |
729 | em28xx_errdev ("cannot change alternate number to %d (error=%i)\n", |
730 | dev->alt, errCode); | |
a6c2ba28 AM |
731 | return errCode; |
732 | } | |
733 | } | |
734 | return 0; | |
735 | } |