Commit | Line | Data |
---|---|---|
59277b67 BT |
1 | /* |
2 | * udlfb.c -- Framebuffer driver for DisplayLink USB controller | |
3 | * | |
4 | * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it> | |
5 | * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com> | |
6 | * | |
7 | * This file is subject to the terms and conditions of the GNU General Public | |
8 | * License v2. See the file COPYING in the main directory of this archive for | |
9 | * more details. | |
10 | * | |
11 | * Layout is based on skeletonfb by James Simmons and Geert Uytterhoeven, | |
12 | * usb-skeleton by GregKH. | |
13 | * | |
14 | * Device-specific portions based on information from Displaylink, with work | |
15 | * from Florian Echtler, Henrik Bjerregaard Pedersen, and others. | |
16 | */ | |
88e58b1a RDI |
17 | |
18 | #include <linux/module.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/usb.h> | |
22 | #include <linux/uaccess.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/fb.h> | |
25 | #include <linux/mutex.h> | |
fb299002 | 26 | #include <linux/vmalloc.h> |
88e58b1a RDI |
27 | |
28 | #include "udlfb.h" | |
29 | ||
59277b67 BT |
30 | #define DRIVER_VERSION "DisplayLink Framebuffer Driver 0.4.1" |
31 | ||
32 | static struct fb_fix_screeninfo dlfb_fix = { | |
1d31a9ee BT |
33 | .id = "displaylinkfb", |
34 | .type = FB_TYPE_PACKED_PIXELS, | |
35 | .visual = FB_VISUAL_TRUECOLOR, | |
36 | .xpanstep = 0, | |
37 | .ypanstep = 0, | |
38 | .ywrapstep = 0, | |
39 | .accel = FB_ACCEL_NONE, | |
59277b67 | 40 | }; |
88e58b1a | 41 | |
cc403dc6 BT |
42 | /* |
43 | * There are many DisplayLink-based products, all with unique PIDs. We are able | |
44 | * to support all volume ones (circa 2009) with a single driver, so we match | |
45 | * globally on VID. TODO: Probe() needs to detect when we might be running | |
46 | * "future" chips, and bail on those, so a compatible driver can match. | |
47 | */ | |
48 | static struct usb_device_id id_table[] = { | |
49 | {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, | |
50 | {}, | |
51 | }; | |
52 | MODULE_DEVICE_TABLE(usb, id_table); | |
88e58b1a | 53 | |
4a4854dd BT |
54 | /* dlfb keeps a list of urbs for efficient bulk transfers */ |
55 | static void dlfb_urb_completion(struct urb *urb); | |
56 | static struct urb *dlfb_get_urb(struct dlfb_data *dev); | |
57 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb * urb, size_t len); | |
58 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size); | |
59 | static void dlfb_free_urb_list(struct dlfb_data *dev); | |
60 | ||
59277b67 BT |
61 | /* |
62 | * Inserts a specific DisplayLink controller command into the provided | |
63 | * buffer. | |
64 | */ | |
4574203f | 65 | static char *dlfb_set_register(char *buf, u8 reg, u8 val) |
88e58b1a | 66 | { |
1d31a9ee BT |
67 | *buf++ = 0xAF; |
68 | *buf++ = 0x20; | |
69 | *buf++ = reg; | |
70 | *buf++ = val; | |
71 | return buf; | |
59277b67 | 72 | } |
88e58b1a | 73 | |
4574203f | 74 | static char *dlfb_vidreg_lock(char *buf) |
59277b67 | 75 | { |
4574203f | 76 | return dlfb_set_register(buf, 0xFF, 0x00); |
59277b67 | 77 | } |
88e58b1a | 78 | |
4574203f | 79 | static char *dlfb_vidreg_unlock(char *buf) |
59277b67 | 80 | { |
4574203f | 81 | return dlfb_set_register(buf, 0xFF, 0xFF); |
59277b67 BT |
82 | } |
83 | ||
84 | /* | |
85 | * Once you send this command, the DisplayLink framebuffer gets driven to the | |
86 | * display. | |
87 | */ | |
4574203f | 88 | static char *dlfb_enable_hvsync(char *buf) |
59277b67 | 89 | { |
4574203f | 90 | return dlfb_set_register(buf, 0x1F, 0x00); |
59277b67 BT |
91 | } |
92 | ||
4574203f | 93 | static char *dlfb_set_color_depth(char *buf, u8 selection) |
59277b67 | 94 | { |
4574203f | 95 | return dlfb_set_register(buf, 0x00, selection); |
59277b67 BT |
96 | } |
97 | ||
4574203f | 98 | static char *dlfb_set_base16bpp(char *wrptr, u32 base) |
59277b67 | 99 | { |
1d31a9ee | 100 | /* the base pointer is 16 bits wide, 0x20 is hi byte. */ |
4574203f BT |
101 | wrptr = dlfb_set_register(wrptr, 0x20, base >> 16); |
102 | wrptr = dlfb_set_register(wrptr, 0x21, base >> 8); | |
103 | return dlfb_set_register(wrptr, 0x22, base); | |
59277b67 BT |
104 | } |
105 | ||
4574203f | 106 | static char *dlfb_set_base8bpp(char *wrptr, u32 base) |
59277b67 | 107 | { |
4574203f BT |
108 | wrptr = dlfb_set_register(wrptr, 0x26, base >> 16); |
109 | wrptr = dlfb_set_register(wrptr, 0x27, base >> 8); | |
110 | return dlfb_set_register(wrptr, 0x28, base); | |
59277b67 BT |
111 | } |
112 | ||
4574203f | 113 | static char *dlfb_set_register_16(char *wrptr, u8 reg, u16 value) |
59277b67 | 114 | { |
4574203f BT |
115 | wrptr = dlfb_set_register(wrptr, reg, value >> 8); |
116 | return dlfb_set_register(wrptr, reg+1, value); | |
59277b67 BT |
117 | } |
118 | ||
119 | /* | |
120 | * This is kind of weird because the controller takes some | |
121 | * register values in a different byte order than other registers. | |
122 | */ | |
4574203f | 123 | static char *dlfb_set_register_16be(char *wrptr, u8 reg, u16 value) |
59277b67 | 124 | { |
4574203f BT |
125 | wrptr = dlfb_set_register(wrptr, reg, value); |
126 | return dlfb_set_register(wrptr, reg+1, value >> 8); | |
59277b67 BT |
127 | } |
128 | ||
129 | /* | |
130 | * LFSR is linear feedback shift register. The reason we have this is | |
131 | * because the display controller needs to minimize the clock depth of | |
132 | * various counters used in the display path. So this code reverses the | |
133 | * provided value into the lfsr16 value by counting backwards to get | |
134 | * the value that needs to be set in the hardware comparator to get the | |
135 | * same actual count. This makes sense once you read above a couple of | |
136 | * times and think about it from a hardware perspective. | |
137 | */ | |
138 | static u16 lfsr16(u16 actual_count) | |
139 | { | |
140 | u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */ | |
141 | ||
142 | while (actual_count--) { | |
143 | lv = ((lv << 1) | | |
144 | (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1)) | |
145 | & 0xFFFF; | |
88e58b1a RDI |
146 | } |
147 | ||
59277b67 BT |
148 | return (u16) lv; |
149 | } | |
150 | ||
151 | /* | |
152 | * This does LFSR conversion on the value that is to be written. | |
153 | * See LFSR explanation above for more detail. | |
154 | */ | |
4574203f | 155 | static char *dlfb_set_register_lfsr16(char *wrptr, u8 reg, u16 value) |
59277b67 | 156 | { |
4574203f | 157 | return dlfb_set_register_16(wrptr, reg, lfsr16(value)); |
88e58b1a RDI |
158 | } |
159 | ||
59277b67 BT |
160 | /* |
161 | * This takes a standard fbdev screeninfo struct and all of its monitor mode | |
162 | * details and converts them into the DisplayLink equivalent register commands. | |
163 | */ | |
4574203f | 164 | static char *dlfb_set_vid_cmds(char *wrptr, struct fb_var_screeninfo *var) |
88e58b1a | 165 | { |
59277b67 BT |
166 | u16 xds, yds; |
167 | u16 xde, yde; | |
168 | u16 yec; | |
169 | ||
59277b67 BT |
170 | /* x display start */ |
171 | xds = var->left_margin + var->hsync_len; | |
4574203f | 172 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x01, xds); |
59277b67 BT |
173 | /* x display end */ |
174 | xde = xds + var->xres; | |
4574203f | 175 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x03, xde); |
59277b67 BT |
176 | |
177 | /* y display start */ | |
178 | yds = var->upper_margin + var->vsync_len; | |
4574203f | 179 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x05, yds); |
59277b67 BT |
180 | /* y display end */ |
181 | yde = yds + var->yres; | |
4574203f | 182 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x07, yde); |
59277b67 BT |
183 | |
184 | /* x end count is active + blanking - 1 */ | |
4574203f BT |
185 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x09, |
186 | xde + var->right_margin - 1); | |
59277b67 BT |
187 | |
188 | /* libdlo hardcodes hsync start to 1 */ | |
4574203f | 189 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0B, 1); |
59277b67 BT |
190 | |
191 | /* hsync end is width of sync pulse + 1 */ | |
4574203f | 192 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0D, var->hsync_len + 1); |
59277b67 BT |
193 | |
194 | /* hpixels is active pixels */ | |
4574203f | 195 | wrptr = dlfb_set_register_16(wrptr, 0x0F, var->xres); |
88e58b1a | 196 | |
59277b67 BT |
197 | /* yendcount is vertical active + vertical blanking */ |
198 | yec = var->yres + var->upper_margin + var->lower_margin + | |
199 | var->vsync_len; | |
4574203f | 200 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x11, yec); |
88e58b1a | 201 | |
59277b67 | 202 | /* libdlo hardcodes vsync start to 0 */ |
4574203f | 203 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x13, 0); |
59277b67 BT |
204 | |
205 | /* vsync end is width of vsync pulse */ | |
4574203f | 206 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x15, var->vsync_len); |
59277b67 BT |
207 | |
208 | /* vpixels is active pixels */ | |
4574203f | 209 | wrptr = dlfb_set_register_16(wrptr, 0x17, var->yres); |
59277b67 BT |
210 | |
211 | /* convert picoseconds to 5kHz multiple for pclk5k = x * 1E12/5k */ | |
4574203f BT |
212 | wrptr = dlfb_set_register_16be(wrptr, 0x1B, |
213 | 200*1000*1000/var->pixclock); | |
59277b67 BT |
214 | |
215 | return wrptr; | |
216 | } | |
217 | ||
218 | /* | |
219 | * This takes a standard fbdev screeninfo struct that was fetched or prepared | |
220 | * and then generates the appropriate command sequence that then drives the | |
221 | * display controller. | |
222 | */ | |
223 | static int dlfb_set_video_mode(struct dlfb_data *dev, | |
224 | struct fb_var_screeninfo *var) | |
225 | { | |
226 | char *buf; | |
227 | char *wrptr; | |
228 | int retval = 0; | |
229 | int writesize; | |
230 | ||
231 | buf = dev->buf; | |
232 | ||
233 | /* | |
234 | * This first section has to do with setting the base address on the | |
235 | * controller * associated with the display. There are 2 base | |
236 | * pointers, currently, we only * use the 16 bpp segment. | |
237 | */ | |
4574203f BT |
238 | wrptr = dlfb_vidreg_lock(buf); |
239 | wrptr = dlfb_set_color_depth(wrptr, 0x00); | |
59277b67 | 240 | /* set base for 16bpp segment to 0 */ |
4574203f | 241 | wrptr = dlfb_set_base16bpp(wrptr, 0); |
59277b67 | 242 | /* set base for 8bpp segment to end of fb */ |
4574203f | 243 | wrptr = dlfb_set_base8bpp(wrptr, dev->info->fix.smem_len); |
59277b67 | 244 | |
4574203f BT |
245 | wrptr = dlfb_set_vid_cmds(wrptr, var); |
246 | wrptr = dlfb_enable_hvsync(wrptr); | |
247 | wrptr = dlfb_vidreg_unlock(wrptr); | |
59277b67 BT |
248 | |
249 | writesize = wrptr - buf; | |
250 | ||
251 | mutex_lock(&dev->bulk_mutex); | |
252 | if (!dev->interface) { /* disconnect() was called */ | |
253 | mutex_unlock(&dev->bulk_mutex); | |
254 | retval = -ENODEV; | |
255 | goto error; | |
88e58b1a | 256 | } |
59277b67 BT |
257 | |
258 | retval = dlfb_bulk_msg(dev, writesize); | |
259 | mutex_unlock(&dev->bulk_mutex); | |
260 | if (retval) { | |
261 | dev_err(&dev->udev->dev, "Problem %d with submit write bulk.\n", | |
262 | retval); | |
263 | goto error; | |
264 | } | |
265 | ||
266 | return 0; | |
267 | ||
268 | error: | |
269 | return retval; | |
270 | } | |
271 | ||
59277b67 BT |
272 | |
273 | /* | |
274 | * Query EDID from the handware, then hand it off to fbdev's edid parse | |
275 | * routine which should give us back a filled in screeninfo structure. | |
276 | */ | |
277 | static int dlfb_get_var_from_edid(struct dlfb_data *dev, | |
278 | struct fb_var_screeninfo *var) | |
279 | { | |
280 | int ret; | |
281 | ||
282 | dlfb_edid(dev); | |
283 | ret = fb_parse_edid(dev->edid, var); | |
284 | ||
285 | return ret; | |
88e58b1a RDI |
286 | } |
287 | ||
4574203f | 288 | static int dlfb_ops_mmap(struct fb_info *info, struct vm_area_struct *vma) |
88e58b1a RDI |
289 | { |
290 | unsigned long start = vma->vm_start; | |
291 | unsigned long size = vma->vm_end - vma->vm_start; | |
292 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
293 | unsigned long page, pos; | |
294 | ||
295 | printk("MMAP: %lu %u\n", offset + size, info->fix.smem_len); | |
296 | ||
f05e0575 | 297 | if (offset + size > info->fix.smem_len) |
88e58b1a | 298 | return -EINVAL; |
88e58b1a RDI |
299 | |
300 | pos = (unsigned long)info->fix.smem_start + offset; | |
301 | ||
302 | while (size > 0) { | |
303 | page = vmalloc_to_pfn((void *)pos); | |
f05e0575 | 304 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) |
88e58b1a | 305 | return -EAGAIN; |
f05e0575 | 306 | |
88e58b1a RDI |
307 | start += PAGE_SIZE; |
308 | pos += PAGE_SIZE; | |
309 | if (size > PAGE_SIZE) | |
310 | size -= PAGE_SIZE; | |
311 | else | |
312 | size = 0; | |
313 | } | |
314 | ||
315 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ | |
316 | return 0; | |
317 | ||
318 | } | |
319 | ||
f05e0575 | 320 | /* ioctl structure */ |
88e58b1a RDI |
321 | struct dloarea { |
322 | int x, y; | |
323 | int w, h; | |
7316bc55 | 324 | int x2, y2; |
88e58b1a RDI |
325 | }; |
326 | ||
88e58b1a RDI |
327 | static struct usb_driver dlfb_driver; |
328 | ||
1d31a9ee | 329 | /* thanks to Henrik Bjerregaard Pedersen for this function */ |
7316bc55 RDI |
330 | static char *rle_compress16(uint16_t * src, char *dst, int rem) |
331 | { | |
332 | ||
333 | int rl; | |
334 | uint16_t pix0; | |
335 | char *end_if_raw = dst + 6 + 2 * rem; | |
336 | ||
1d31a9ee | 337 | dst += 6; /* header will be filled in if RLE is worth it */ |
7316bc55 RDI |
338 | |
339 | while (rem && dst < end_if_raw) { | |
340 | char *start = (char *)src; | |
341 | ||
342 | pix0 = *src++; | |
343 | rl = 1; | |
344 | rem--; | |
345 | while (rem && *src == pix0) | |
346 | rem--, rl++, src++; | |
347 | *dst++ = rl; | |
348 | *dst++ = start[1]; | |
349 | *dst++ = start[0]; | |
350 | } | |
351 | ||
352 | return dst; | |
353 | } | |
354 | ||
355 | /* | |
1d31a9ee BT |
356 | Thanks to Henrik Bjerregaard Pedersen for rle implementation |
357 | and code refactoring. Next step is huffman compression. | |
7316bc55 RDI |
358 | */ |
359 | ||
88e58b1a RDI |
360 | static int |
361 | image_blit(struct dlfb_data *dev_info, int x, int y, int width, int height, | |
362 | char *data) | |
363 | { | |
364 | ||
365 | int i, j, base; | |
366 | int rem = width; | |
367 | int ret; | |
368 | ||
7316bc55 | 369 | int firstdiff, thistime; |
88e58b1a RDI |
370 | |
371 | char *bufptr; | |
372 | ||
f05e0575 | 373 | if (x + width > dev_info->info->var.xres) |
88e58b1a | 374 | return -EINVAL; |
88e58b1a | 375 | |
f05e0575 | 376 | if (y + height > dev_info->info->var.yres) |
88e58b1a | 377 | return -EINVAL; |
88e58b1a RDI |
378 | |
379 | mutex_lock(&dev_info->bulk_mutex); | |
380 | ||
7316bc55 RDI |
381 | base = |
382 | dev_info->base16 + ((dev_info->info->var.xres * 2 * y) + (x * 2)); | |
88e58b1a RDI |
383 | |
384 | data += (dev_info->info->var.xres * 2 * y) + (x * 2); | |
385 | ||
f05e0575 | 386 | /* printk("IMAGE_BLIT\n"); */ |
88e58b1a RDI |
387 | |
388 | bufptr = dev_info->buf; | |
389 | ||
390 | for (i = y; i < y + height; i++) { | |
391 | ||
392 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { | |
393 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); | |
394 | bufptr = dev_info->buf; | |
395 | } | |
396 | ||
397 | rem = width; | |
398 | ||
f05e0575 | 399 | /* printk("WRITING LINE %d\n", i); */ |
88e58b1a RDI |
400 | |
401 | while (rem) { | |
402 | ||
403 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { | |
404 | ret = | |
405 | dlfb_bulk_msg(dev_info, | |
406 | bufptr - dev_info->buf); | |
407 | bufptr = dev_info->buf; | |
408 | } | |
1d31a9ee | 409 | /* number of pixels to consider this time */ |
7316bc55 RDI |
410 | thistime = rem; |
411 | if (thistime > 255) | |
412 | thistime = 255; | |
413 | ||
59277b67 BT |
414 | if (dev_info->backing_buffer) { |
415 | /* find first pixel that has changed */ | |
416 | firstdiff = -1; | |
417 | for (j = 0; j < thistime * 2; j++) { | |
418 | if (dev_info->backing_buffer | |
419 | [base - dev_info->base16 + j] | |
420 | != data[j]) { | |
421 | firstdiff = j / 2; | |
422 | break; | |
423 | } | |
88e58b1a | 424 | } |
59277b67 BT |
425 | |
426 | } else { | |
427 | firstdiff = 0; | |
428 | ||
7316bc55 | 429 | } |
88e58b1a | 430 | |
7316bc55 RDI |
431 | if (firstdiff >= 0) { |
432 | char *end_of_rle; | |
433 | ||
434 | end_of_rle = | |
435 | rle_compress16((uint16_t *) (data + | |
436 | firstdiff * 2), | |
437 | bufptr, | |
438 | thistime - firstdiff); | |
439 | ||
440 | if (end_of_rle < | |
441 | bufptr + 6 + 2 * (thistime - firstdiff)) { | |
442 | bufptr[0] = 0xAF; | |
443 | bufptr[1] = 0x69; | |
444 | ||
445 | bufptr[2] = | |
446 | (char)((base + | |
447 | firstdiff * 2) >> 16); | |
448 | bufptr[3] = | |
449 | (char)((base + firstdiff * 2) >> 8); | |
450 | bufptr[4] = | |
451 | (char)(base + firstdiff * 2); | |
452 | bufptr[5] = thistime - firstdiff; | |
453 | ||
454 | bufptr = end_of_rle; | |
455 | ||
456 | } else { | |
1d31a9ee | 457 | /* fallback to raw (or other?) */ |
88e58b1a RDI |
458 | *bufptr++ = 0xAF; |
459 | *bufptr++ = 0x68; | |
460 | ||
7316bc55 RDI |
461 | *bufptr++ = |
462 | (char)((base + | |
463 | firstdiff * 2) >> 16); | |
464 | *bufptr++ = | |
465 | (char)((base + firstdiff * 2) >> 8); | |
466 | *bufptr++ = | |
467 | (char)(base + firstdiff * 2); | |
468 | *bufptr++ = thistime - firstdiff; | |
7316bc55 RDI |
469 | for (j = firstdiff * 2; |
470 | j < thistime * 2; j += 2) { | |
471 | *bufptr++ = data[j + 1]; | |
472 | *bufptr++ = data[j]; | |
88e58b1a | 473 | } |
88e58b1a | 474 | } |
88e58b1a RDI |
475 | } |
476 | ||
7316bc55 RDI |
477 | base += thistime * 2; |
478 | data += thistime * 2; | |
479 | rem -= thistime; | |
88e58b1a RDI |
480 | } |
481 | ||
59277b67 BT |
482 | if (dev_info->backing_buffer) |
483 | memcpy(dev_info->backing_buffer + | |
484 | (base - dev_info->base16) - | |
485 | (width * 2), data - (width * 2), width * 2); | |
88e58b1a RDI |
486 | |
487 | base += (dev_info->info->var.xres * 2) - (width * 2); | |
488 | data += (dev_info->info->var.xres * 2) - (width * 2); | |
489 | ||
490 | } | |
491 | ||
7316bc55 | 492 | if (bufptr > dev_info->buf) { |
88e58b1a | 493 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
7316bc55 | 494 | } |
88e58b1a RDI |
495 | |
496 | mutex_unlock(&dev_info->bulk_mutex); | |
497 | ||
498 | return base; | |
499 | ||
500 | } | |
501 | ||
502 | static int | |
503 | draw_rect(struct dlfb_data *dev_info, int x, int y, int width, int height, | |
504 | unsigned char red, unsigned char green, unsigned char blue) | |
505 | { | |
506 | ||
507 | int i, j, base; | |
508 | int ret; | |
509 | unsigned short col = | |
510 | (((((red) & 0xF8) | ((green) >> 5)) & 0xFF) << 8) + | |
511 | (((((green) & 0x1C) << 3) | ((blue) >> 3)) & 0xFF); | |
512 | int rem = width; | |
513 | ||
514 | char *bufptr; | |
515 | ||
f05e0575 | 516 | if (x + width > dev_info->info->var.xres) |
88e58b1a | 517 | return -EINVAL; |
88e58b1a | 518 | |
f05e0575 | 519 | if (y + height > dev_info->info->var.yres) |
88e58b1a | 520 | return -EINVAL; |
88e58b1a RDI |
521 | |
522 | mutex_lock(&dev_info->bulk_mutex); | |
523 | ||
524 | base = dev_info->base16 + (dev_info->info->var.xres * 2 * y) + (x * 2); | |
525 | ||
526 | bufptr = dev_info->buf; | |
527 | ||
528 | for (i = y; i < y + height; i++) { | |
529 | ||
59277b67 BT |
530 | if (dev_info->backing_buffer) { |
531 | for (j = 0; j < width * 2; j += 2) { | |
532 | dev_info->backing_buffer | |
533 | [base - dev_info->base16 + j] = | |
534 | (char)(col >> 8); | |
535 | dev_info->backing_buffer | |
536 | [base - dev_info->base16 + j + 1] = | |
537 | (char)(col); | |
538 | } | |
88e58b1a | 539 | } |
59277b67 | 540 | |
88e58b1a RDI |
541 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
542 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); | |
543 | bufptr = dev_info->buf; | |
544 | } | |
545 | ||
546 | rem = width; | |
547 | ||
548 | while (rem) { | |
549 | ||
550 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { | |
551 | ret = | |
552 | dlfb_bulk_msg(dev_info, | |
553 | bufptr - dev_info->buf); | |
554 | bufptr = dev_info->buf; | |
555 | } | |
556 | ||
557 | *bufptr++ = 0xAF; | |
558 | *bufptr++ = 0x69; | |
559 | ||
560 | *bufptr++ = (char)(base >> 16); | |
561 | *bufptr++ = (char)(base >> 8); | |
562 | *bufptr++ = (char)(base); | |
563 | ||
564 | if (rem > 255) { | |
565 | *bufptr++ = 255; | |
566 | *bufptr++ = 255; | |
567 | rem -= 255; | |
568 | base += 255 * 2; | |
569 | } else { | |
570 | *bufptr++ = rem; | |
571 | *bufptr++ = rem; | |
572 | base += rem * 2; | |
573 | rem = 0; | |
574 | } | |
575 | ||
576 | *bufptr++ = (char)(col >> 8); | |
577 | *bufptr++ = (char)(col); | |
578 | ||
579 | } | |
580 | ||
581 | base += (dev_info->info->var.xres * 2) - (width * 2); | |
582 | ||
583 | } | |
584 | ||
f05e0575 | 585 | if (bufptr > dev_info->buf) |
88e58b1a | 586 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
88e58b1a RDI |
587 | |
588 | mutex_unlock(&dev_info->bulk_mutex); | |
589 | ||
590 | return 1; | |
591 | } | |
592 | ||
7316bc55 RDI |
593 | static void swapfb(struct dlfb_data *dev_info) |
594 | { | |
595 | ||
596 | int tmpbase; | |
597 | char *bufptr; | |
598 | ||
599 | mutex_lock(&dev_info->bulk_mutex); | |
600 | ||
601 | tmpbase = dev_info->base16; | |
602 | ||
603 | dev_info->base16 = dev_info->base16d; | |
604 | dev_info->base16d = tmpbase; | |
605 | ||
606 | bufptr = dev_info->buf; | |
607 | ||
608 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); | |
609 | ||
1d31a9ee | 610 | /* set addresses */ |
7316bc55 RDI |
611 | bufptr = |
612 | dlfb_set_register(bufptr, 0x20, (char)(dev_info->base16 >> 16)); | |
613 | bufptr = dlfb_set_register(bufptr, 0x21, (char)(dev_info->base16 >> 8)); | |
614 | bufptr = dlfb_set_register(bufptr, 0x22, (char)(dev_info->base16)); | |
615 | ||
616 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); | |
617 | ||
618 | dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); | |
619 | ||
620 | mutex_unlock(&dev_info->bulk_mutex); | |
621 | } | |
622 | ||
623 | static int copyfb(struct dlfb_data *dev_info) | |
624 | { | |
625 | int base; | |
626 | int source; | |
627 | int rem; | |
628 | int i, ret; | |
629 | ||
630 | char *bufptr; | |
631 | ||
632 | base = dev_info->base16d; | |
633 | ||
634 | mutex_lock(&dev_info->bulk_mutex); | |
635 | ||
636 | source = dev_info->base16; | |
637 | ||
638 | bufptr = dev_info->buf; | |
639 | ||
640 | for (i = 0; i < dev_info->info->var.yres; i++) { | |
641 | ||
642 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { | |
643 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); | |
644 | bufptr = dev_info->buf; | |
645 | } | |
646 | ||
647 | rem = dev_info->info->var.xres; | |
648 | ||
649 | while (rem) { | |
650 | ||
651 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { | |
652 | ret = | |
653 | dlfb_bulk_msg(dev_info, | |
654 | bufptr - dev_info->buf); | |
655 | bufptr = dev_info->buf; | |
656 | ||
657 | } | |
658 | ||
659 | *bufptr++ = 0xAF; | |
660 | *bufptr++ = 0x6A; | |
661 | ||
662 | *bufptr++ = (char)(base >> 16); | |
663 | *bufptr++ = (char)(base >> 8); | |
664 | *bufptr++ = (char)(base); | |
665 | ||
666 | if (rem > 255) { | |
667 | *bufptr++ = 255; | |
668 | *bufptr++ = (char)(source >> 16); | |
669 | *bufptr++ = (char)(source >> 8); | |
670 | *bufptr++ = (char)(source); | |
671 | ||
672 | rem -= 255; | |
673 | base += 255 * 2; | |
674 | source += 255 * 2; | |
675 | ||
676 | } else { | |
677 | *bufptr++ = rem; | |
678 | *bufptr++ = (char)(source >> 16); | |
679 | *bufptr++ = (char)(source >> 8); | |
680 | *bufptr++ = (char)(source); | |
681 | ||
682 | base += rem * 2; | |
683 | source += rem * 2; | |
684 | rem = 0; | |
685 | } | |
686 | } | |
687 | } | |
688 | ||
689 | if (bufptr > dev_info->buf) | |
690 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); | |
691 | ||
692 | mutex_unlock(&dev_info->bulk_mutex); | |
693 | ||
694 | return 1; | |
695 | ||
696 | } | |
697 | ||
88e58b1a RDI |
698 | static int |
699 | copyarea(struct dlfb_data *dev_info, int dx, int dy, int sx, int sy, | |
700 | int width, int height) | |
701 | { | |
88e58b1a RDI |
702 | int base; |
703 | int source; | |
704 | int rem; | |
705 | int i, ret; | |
706 | ||
707 | char *bufptr; | |
708 | ||
f05e0575 | 709 | if (dx + width > dev_info->info->var.xres) |
88e58b1a | 710 | return -EINVAL; |
88e58b1a | 711 | |
f05e0575 | 712 | if (dy + height > dev_info->info->var.yres) |
88e58b1a | 713 | return -EINVAL; |
88e58b1a RDI |
714 | |
715 | mutex_lock(&dev_info->bulk_mutex); | |
716 | ||
717 | base = | |
718 | dev_info->base16 + (dev_info->info->var.xres * 2 * dy) + (dx * 2); | |
719 | source = (dev_info->info->var.xres * 2 * sy) + (sx * 2); | |
720 | ||
721 | bufptr = dev_info->buf; | |
722 | ||
723 | for (i = sy; i < sy + height; i++) { | |
724 | ||
7316bc55 | 725 | memcpy(dev_info->backing_buffer + base - dev_info->base16, |
88e58b1a RDI |
726 | dev_info->backing_buffer + source, width * 2); |
727 | ||
728 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { | |
729 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); | |
730 | bufptr = dev_info->buf; | |
731 | } | |
732 | ||
733 | rem = width; | |
734 | ||
735 | while (rem) { | |
736 | ||
737 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { | |
738 | ret = | |
739 | dlfb_bulk_msg(dev_info, | |
740 | bufptr - dev_info->buf); | |
741 | bufptr = dev_info->buf; | |
742 | } | |
743 | ||
744 | *bufptr++ = 0xAF; | |
745 | *bufptr++ = 0x6A; | |
746 | ||
747 | *bufptr++ = (char)(base >> 16); | |
748 | *bufptr++ = (char)(base >> 8); | |
749 | *bufptr++ = (char)(base); | |
750 | ||
751 | if (rem > 255) { | |
752 | *bufptr++ = 255; | |
753 | *bufptr++ = (char)(source >> 16); | |
754 | *bufptr++ = (char)(source >> 8); | |
755 | *bufptr++ = (char)(source); | |
756 | ||
757 | rem -= 255; | |
758 | base += 255 * 2; | |
759 | source += 255 * 2; | |
760 | ||
761 | } else { | |
762 | *bufptr++ = rem; | |
763 | *bufptr++ = (char)(source >> 16); | |
764 | *bufptr++ = (char)(source >> 8); | |
765 | *bufptr++ = (char)(source); | |
766 | ||
767 | base += rem * 2; | |
768 | source += rem * 2; | |
769 | rem = 0; | |
770 | } | |
88e58b1a RDI |
771 | } |
772 | ||
773 | base += (dev_info->info->var.xres * 2) - (width * 2); | |
774 | source += (dev_info->info->var.xres * 2) - (width * 2); | |
88e58b1a RDI |
775 | } |
776 | ||
f05e0575 | 777 | if (bufptr > dev_info->buf) |
88e58b1a | 778 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
88e58b1a RDI |
779 | |
780 | mutex_unlock(&dev_info->bulk_mutex); | |
781 | ||
782 | return 1; | |
783 | } | |
784 | ||
4574203f BT |
785 | static void dlfb_ops_copyarea(struct fb_info *info, |
786 | const struct fb_copyarea *area) | |
88e58b1a | 787 | { |
88e58b1a RDI |
788 | struct dlfb_data *dev = info->par; |
789 | ||
790 | copyarea(dev, area->dx, area->dy, area->sx, area->sy, area->width, | |
791 | area->height); | |
88e58b1a RDI |
792 | } |
793 | ||
4574203f BT |
794 | static void dlfb_ops_imageblit(struct fb_info *info, |
795 | const struct fb_image *image) | |
88e58b1a | 796 | { |
88e58b1a RDI |
797 | int ret; |
798 | struct dlfb_data *dev = info->par; | |
88e58b1a RDI |
799 | cfb_imageblit(info, image); |
800 | ret = | |
801 | image_blit(dev, image->dx, image->dy, image->width, image->height, | |
802 | info->screen_base); | |
88e58b1a RDI |
803 | } |
804 | ||
4574203f | 805 | static void dlfb_ops_fillrect(struct fb_info *info, |
7316bc55 | 806 | const struct fb_fillrect *region) |
88e58b1a RDI |
807 | { |
808 | ||
809 | unsigned char red, green, blue; | |
810 | struct dlfb_data *dev = info->par; | |
811 | ||
812 | memcpy(&red, ®ion->color, 1); | |
813 | memcpy(&green, ®ion->color + 1, 1); | |
814 | memcpy(&blue, ®ion->color + 2, 1); | |
815 | draw_rect(dev, region->dx, region->dy, region->width, region->height, | |
816 | red, green, blue); | |
f05e0575 | 817 | /* printk("FILL RECT %d %d !!!\n", region->dx, region->dy); */ |
88e58b1a RDI |
818 | |
819 | } | |
820 | ||
7d9485e2 BT |
821 | static void dlfb_get_edid(struct dlfb_data *dev) |
822 | { | |
823 | int i; | |
824 | int ret; | |
825 | char rbuf[2]; | |
826 | ||
827 | for (i = 0; i < sizeof(dev->edid); i++) { | |
828 | ret = usb_control_msg(dev->udev, | |
829 | usb_rcvctrlpipe(dev->udev, 0), (0x02), | |
830 | (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, | |
831 | 0); | |
832 | dev->edid[i] = rbuf[1]; | |
833 | } | |
834 | } | |
835 | ||
4574203f BT |
836 | static int dlfb_ops_ioctl(struct fb_info *info, unsigned int cmd, |
837 | unsigned long arg) | |
88e58b1a | 838 | { |
88e58b1a | 839 | struct dlfb_data *dev_info = info->par; |
7316bc55 | 840 | struct dloarea *area = NULL; |
88e58b1a | 841 | |
7316bc55 RDI |
842 | if (cmd == 0xAD) { |
843 | char *edid = (char *)arg; | |
844 | dlfb_edid(dev_info); | |
845 | if (copy_to_user(edid, dev_info->edid, 128)) { | |
846 | return -EFAULT; | |
847 | } | |
848 | return 0; | |
849 | } | |
850 | ||
851 | if (cmd == 0xAA || cmd == 0xAB || cmd == 0xAC) { | |
88e58b1a RDI |
852 | |
853 | area = (struct dloarea *)arg; | |
854 | ||
855 | if (area->x < 0) | |
856 | area->x = 0; | |
857 | ||
858 | if (area->x > info->var.xres) | |
859 | area->x = info->var.xres; | |
860 | ||
861 | if (area->y < 0) | |
862 | area->y = 0; | |
863 | ||
864 | if (area->y > info->var.yres) | |
865 | area->y = info->var.yres; | |
7316bc55 | 866 | } |
88e58b1a | 867 | |
7316bc55 | 868 | if (cmd == 0xAA) { |
88e58b1a RDI |
869 | image_blit(dev_info, area->x, area->y, area->w, area->h, |
870 | info->screen_base); | |
871 | } | |
7316bc55 RDI |
872 | if (cmd == 0xAC) { |
873 | copyfb(dev_info); | |
874 | image_blit(dev_info, area->x, area->y, area->w, area->h, | |
875 | info->screen_base); | |
876 | swapfb(dev_info); | |
877 | } else if (cmd == 0xAB) { | |
878 | ||
879 | if (area->x2 < 0) | |
880 | area->x2 = 0; | |
881 | ||
882 | if (area->y2 < 0) | |
883 | area->y2 = 0; | |
884 | ||
885 | copyarea(dev_info, | |
886 | area->x2, area->y2, area->x, area->y, area->w, | |
887 | area->h); | |
888 | } | |
88e58b1a RDI |
889 | return 0; |
890 | } | |
891 | ||
f05e0575 | 892 | /* taken from vesafb */ |
88e58b1a | 893 | static int |
4574203f | 894 | dlfb_ops_setcolreg(unsigned regno, unsigned red, unsigned green, |
88e58b1a RDI |
895 | unsigned blue, unsigned transp, struct fb_info *info) |
896 | { | |
897 | int err = 0; | |
898 | ||
899 | if (regno >= info->cmap.len) | |
900 | return 1; | |
901 | ||
902 | if (regno < 16) { | |
903 | if (info->var.red.offset == 10) { | |
904 | /* 1:5:5:5 */ | |
905 | ((u32 *) (info->pseudo_palette))[regno] = | |
906 | ((red & 0xf800) >> 1) | | |
907 | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); | |
908 | } else { | |
909 | /* 0:5:6:5 */ | |
910 | ((u32 *) (info->pseudo_palette))[regno] = | |
911 | ((red & 0xf800)) | | |
912 | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); | |
913 | } | |
914 | } | |
915 | ||
916 | return err; | |
917 | } | |
918 | ||
4574203f | 919 | static int dlfb_ops_release(struct fb_info *info, int user) |
88e58b1a RDI |
920 | { |
921 | struct dlfb_data *dev_info = info->par; | |
922 | image_blit(dev_info, 0, 0, info->var.xres, info->var.yres, | |
923 | info->screen_base); | |
924 | return 0; | |
925 | } | |
926 | ||
4a4854dd BT |
927 | /* |
928 | * Called when all client interfaces to start transactions have been disabled, | |
929 | * and all references to our device instance (dlfb_data) are released. | |
930 | * Every transaction must have a reference, so we know are fully spun down | |
931 | */ | |
932 | static void dlfb_delete(struct kref *kref) | |
933 | { | |
934 | struct dlfb_data *dev = container_of(kref, struct dlfb_data, kref); | |
935 | ||
936 | if (dev->backing_buffer) | |
937 | vfree(dev->backing_buffer); | |
938 | ||
939 | kfree(dev); | |
940 | } | |
941 | ||
7d9485e2 BT |
942 | /* |
943 | * Check whether a video mode is supported by the DisplayLink chip | |
944 | * We start from monitor's modes, so don't need to filter that here | |
945 | */ | |
946 | static int dlfb_is_valid_mode(struct fb_videomode *mode, | |
947 | struct fb_info *info) | |
948 | { | |
949 | struct dlfb_data *dev = info->par; | |
950 | ||
951 | if (mode->xres * mode->yres > dev->sku_pixel_limit) | |
952 | return 0; | |
953 | ||
954 | return 1; | |
955 | } | |
956 | ||
957 | static void dlfb_var_color_format(struct fb_var_screeninfo *var) | |
958 | { | |
959 | const struct fb_bitfield red = { 11, 5, 0 }; | |
960 | const struct fb_bitfield green = { 5, 6, 0 }; | |
961 | const struct fb_bitfield blue = { 0, 5, 0 }; | |
962 | ||
963 | var->bits_per_pixel = 16; | |
964 | var->red = red; | |
965 | var->green = green; | |
966 | var->blue = blue; | |
967 | } | |
968 | ||
4574203f | 969 | static int dlfb_ops_blank(int blank_mode, struct fb_info *info) |
f05e0575 | 970 | { |
7316bc55 RDI |
971 | struct dlfb_data *dev_info = info->par; |
972 | char *bufptr = dev_info->buf; | |
973 | ||
974 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); | |
975 | if (blank_mode != FB_BLANK_UNBLANK) { | |
976 | bufptr = dlfb_set_register(bufptr, 0x1F, 0x01); | |
977 | } else { | |
978 | bufptr = dlfb_set_register(bufptr, 0x1F, 0x00); | |
979 | } | |
980 | bufptr = dlfb_set_register(bufptr, 0xFF, 0xFF); | |
981 | ||
982 | dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); | |
983 | ||
88e58b1a RDI |
984 | return 0; |
985 | } | |
986 | ||
987 | static struct fb_ops dlfb_ops = { | |
4574203f BT |
988 | .fb_setcolreg = dlfb_ops_setcolreg, |
989 | .fb_fillrect = dlfb_ops_fillrect, | |
990 | .fb_copyarea = dlfb_ops_copyarea, | |
991 | .fb_imageblit = dlfb_ops_imageblit, | |
992 | .fb_mmap = dlfb_ops_mmap, | |
993 | .fb_ioctl = dlfb_ops_ioctl, | |
994 | .fb_release = dlfb_ops_release, | |
995 | .fb_blank = dlfb_ops_blank, | |
88e58b1a RDI |
996 | }; |
997 | ||
7d9485e2 BT |
998 | /* |
999 | * Calls dlfb_get_edid() to query the EDID of attached monitor via usb cmds | |
1000 | * Then parses EDID into three places used by various parts of fbdev: | |
1001 | * fb_var_screeninfo contains the timing of the monitor's preferred mode | |
1002 | * fb_info.monspecs is full parsed EDID info, including monspecs.modedb | |
1003 | * fb_info.modelist is a linked list of all monitor & VESA modes which work | |
1004 | * | |
1005 | * If EDID is not readable/valid, then modelist is all VESA modes, | |
1006 | * monspecs is NULL, and fb_var_screeninfo is set to safe VESA mode | |
1007 | * Returns 0 if EDID parses successfully | |
1008 | */ | |
1009 | static int dlfb_parse_edid(struct dlfb_data *dev, | |
1010 | struct fb_var_screeninfo *var, | |
1011 | struct fb_info *info) | |
1012 | { | |
1013 | int i; | |
1014 | const struct fb_videomode *default_vmode = NULL; | |
1015 | int result = 0; | |
1016 | ||
1017 | fb_destroy_modelist(&info->modelist); | |
1018 | memset(&info->monspecs, 0, sizeof(info->monspecs)); | |
1019 | ||
1020 | dlfb_get_edid(dev); | |
1021 | fb_edid_to_monspecs(dev->edid, &info->monspecs); | |
1022 | ||
1023 | if (info->monspecs.modedb_len > 0) { | |
1024 | ||
1025 | for (i = 0; i < info->monspecs.modedb_len; i++) { | |
1026 | if (dlfb_is_valid_mode(&info->monspecs.modedb[i], info)) | |
1027 | fb_add_videomode(&info->monspecs.modedb[i], | |
1028 | &info->modelist); | |
1029 | } | |
1030 | ||
1031 | default_vmode = fb_find_best_display(&info->monspecs, | |
1032 | &info->modelist); | |
1033 | } else { | |
1034 | struct fb_videomode fb_vmode = {0}; | |
1035 | ||
1036 | dl_err("Unable to get valid EDID from device/display\n"); | |
1037 | result = 1; | |
1038 | ||
1039 | /* | |
1040 | * Add the standard VESA modes to our modelist | |
1041 | * Since we don't have EDID, there may be modes that | |
1042 | * overspec monitor and/or are incorrect aspect ratio, etc. | |
1043 | * But at least the user has a chance to choose | |
1044 | */ | |
1045 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { | |
1046 | if (dlfb_is_valid_mode((struct fb_videomode *) | |
1047 | &vesa_modes[i], info)) | |
1048 | fb_add_videomode(&vesa_modes[i], | |
1049 | &info->modelist); | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * default to resolution safe for projectors | |
1054 | * (since they are most common case without EDID) | |
1055 | */ | |
1056 | fb_vmode.xres = 800; | |
1057 | fb_vmode.yres = 600; | |
1058 | fb_vmode.refresh = 60; | |
1059 | default_vmode = fb_find_nearest_mode(&fb_vmode, | |
1060 | &info->modelist); | |
1061 | } | |
1062 | ||
1063 | fb_videomode_to_var(var, default_vmode); | |
1064 | dlfb_var_color_format(var); | |
1065 | ||
1066 | return result; | |
1067 | } | |
1068 | ||
1069 | static ssize_t metrics_bytes_rendered_show(struct device *fbdev, | |
1070 | struct device_attribute *a, char *buf) { | |
1071 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1072 | struct dlfb_data *dev = fb_info->par; | |
1073 | return snprintf(buf, PAGE_SIZE, "%u\n", | |
1074 | atomic_read(&dev->bytes_rendered)); | |
1075 | } | |
1076 | ||
1077 | static ssize_t metrics_bytes_identical_show(struct device *fbdev, | |
1078 | struct device_attribute *a, char *buf) { | |
1079 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1080 | struct dlfb_data *dev = fb_info->par; | |
1081 | return snprintf(buf, PAGE_SIZE, "%u\n", | |
1082 | atomic_read(&dev->bytes_identical)); | |
1083 | } | |
1084 | ||
1085 | static ssize_t metrics_bytes_sent_show(struct device *fbdev, | |
1086 | struct device_attribute *a, char *buf) { | |
1087 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1088 | struct dlfb_data *dev = fb_info->par; | |
1089 | return snprintf(buf, PAGE_SIZE, "%u\n", | |
1090 | atomic_read(&dev->bytes_sent)); | |
1091 | } | |
1092 | ||
1093 | static ssize_t metrics_cpu_kcycles_used_show(struct device *fbdev, | |
1094 | struct device_attribute *a, char *buf) { | |
1095 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1096 | struct dlfb_data *dev = fb_info->par; | |
1097 | return snprintf(buf, PAGE_SIZE, "%u\n", | |
1098 | atomic_read(&dev->cpu_kcycles_used)); | |
1099 | } | |
1100 | ||
1101 | static ssize_t metrics_misc_show(struct device *fbdev, | |
1102 | struct device_attribute *a, char *buf) { | |
1103 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1104 | struct dlfb_data *dev = fb_info->par; | |
1105 | return snprintf(buf, PAGE_SIZE, | |
1106 | "Calls to\ndamage: %u\nblit: %u\n" | |
1107 | "defio faults: %u\ncopy: %u\n" | |
1108 | "fill: %u\n\n" | |
1109 | "active framebuffer clients: %d\n" | |
1110 | "urbs available %d(%d)\n" | |
1111 | "Shadow framebuffer in use? %s\n" | |
1112 | "Any lost pixels? %s\n", | |
1113 | atomic_read(&dev->damage_count), | |
1114 | atomic_read(&dev->blit_count), | |
1115 | atomic_read(&dev->defio_fault_count), | |
1116 | atomic_read(&dev->copy_count), | |
1117 | atomic_read(&dev->fill_count), | |
1118 | dev->fb_count, | |
1119 | dev->urbs.available, dev->urbs.limit_sem.count, | |
1120 | (dev->backing_buffer) ? "yes" : "no", | |
1121 | atomic_read(&dev->lost_pixels) ? "yes" : "no"); | |
1122 | } | |
1123 | ||
1124 | static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *a, | |
1125 | char *buf, loff_t off, size_t count) { | |
1126 | struct device *fbdev = container_of(kobj, struct device, kobj); | |
1127 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1128 | struct dlfb_data *dev = fb_info->par; | |
1129 | char *edid = &dev->edid[0]; | |
1130 | const size_t size = sizeof(dev->edid); | |
1131 | ||
1132 | if (dlfb_parse_edid(dev, &fb_info->var, fb_info)) | |
1133 | return 0; | |
1134 | ||
1135 | if (off >= size) | |
1136 | return 0; | |
1137 | ||
1138 | if (off + count > size) | |
1139 | count = size - off; | |
1140 | memcpy(buf, edid + off, count); | |
1141 | ||
1142 | return count; | |
1143 | } | |
1144 | ||
1145 | ||
1146 | static ssize_t metrics_reset_store(struct device *fbdev, | |
1147 | struct device_attribute *attr, | |
1148 | const char *buf, size_t count) | |
1149 | { | |
1150 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1151 | struct dlfb_data *dev = fb_info->par; | |
1152 | ||
1153 | atomic_set(&dev->bytes_rendered, 0); | |
1154 | atomic_set(&dev->bytes_identical, 0); | |
1155 | atomic_set(&dev->bytes_sent, 0); | |
1156 | atomic_set(&dev->cpu_kcycles_used, 0); | |
1157 | atomic_set(&dev->blit_count, 0); | |
1158 | atomic_set(&dev->copy_count, 0); | |
1159 | atomic_set(&dev->fill_count, 0); | |
1160 | atomic_set(&dev->defio_fault_count, 0); | |
1161 | atomic_set(&dev->damage_count, 0); | |
1162 | ||
1163 | return count; | |
1164 | } | |
1165 | ||
1166 | static ssize_t use_defio_show(struct device *fbdev, | |
1167 | struct device_attribute *a, char *buf) { | |
1168 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1169 | struct dlfb_data *dev = fb_info->par; | |
1170 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
1171 | atomic_read(&dev->use_defio)); | |
1172 | } | |
1173 | ||
1174 | static ssize_t use_defio_store(struct device *fbdev, | |
1175 | struct device_attribute *attr, | |
1176 | const char *buf, size_t count) | |
1177 | { | |
1178 | struct fb_info *fb_info = dev_get_drvdata(fbdev); | |
1179 | struct dlfb_data *dev = fb_info->par; | |
1180 | ||
1181 | if (count > 0) { | |
1182 | if (buf[0] == '0') | |
1183 | atomic_set(&dev->use_defio, 0); | |
1184 | if (buf[0] == '1') | |
1185 | atomic_set(&dev->use_defio, 1); | |
1186 | } | |
1187 | return count; | |
1188 | } | |
1189 | ||
1190 | static struct bin_attribute edid_attr = { | |
1191 | .attr.name = "edid", | |
1192 | .attr.mode = 0444, | |
1193 | .size = 128, | |
1194 | .read = edid_show, | |
1195 | }; | |
1196 | ||
1197 | static struct device_attribute fb_device_attrs[] = { | |
1198 | __ATTR_RO(metrics_bytes_rendered), | |
1199 | __ATTR_RO(metrics_bytes_identical), | |
1200 | __ATTR_RO(metrics_bytes_sent), | |
1201 | __ATTR_RO(metrics_cpu_kcycles_used), | |
1202 | __ATTR_RO(metrics_misc), | |
1203 | __ATTR(metrics_reset, S_IWUGO, NULL, metrics_reset_store), | |
1204 | __ATTR_RW(use_defio), | |
1205 | }; | |
1206 | ||
cc403dc6 BT |
1207 | /* |
1208 | * This is necessary before we can communicate with the display controller. | |
1209 | */ | |
1210 | static int dlfb_select_std_channel(struct dlfb_data *dev) | |
1211 | { | |
1212 | int ret; | |
1213 | u8 set_def_chn[] = { 0x57, 0xCD, 0xDC, 0xA7, | |
1214 | 0x1C, 0x88, 0x5E, 0x15, | |
1215 | 0x60, 0xFE, 0xC6, 0x97, | |
1216 | 0x16, 0x3D, 0x47, 0xF2 }; | |
1217 | ||
1218 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
1219 | NR_USB_REQUEST_CHANNEL, | |
1220 | (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0, | |
1221 | set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT); | |
1222 | return ret; | |
1223 | } | |
1224 | ||
59277b67 BT |
1225 | static int dlfb_probe(struct usb_interface *interface, |
1226 | const struct usb_device_id *id) | |
88e58b1a | 1227 | { |
59277b67 BT |
1228 | struct device *mydev; |
1229 | struct usb_device *usbdev; | |
1230 | struct dlfb_data *dev; | |
88e58b1a | 1231 | struct fb_info *info; |
59277b67 BT |
1232 | int videomemorysize; |
1233 | unsigned char *videomemory; | |
1234 | int retval = -ENOMEM; | |
1235 | struct fb_var_screeninfo *var; | |
1236 | struct fb_bitfield red = { 11, 5, 0 }; | |
1237 | struct fb_bitfield green = { 5, 6, 0 }; | |
1238 | struct fb_bitfield blue = { 0, 5, 0 }; | |
1239 | ||
1240 | usbdev = usb_get_dev(interface_to_usbdev(interface)); | |
1241 | mydev = &usbdev->dev; | |
1242 | ||
1243 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
1244 | if (dev == NULL) { | |
1245 | dev_err(mydev, "failed alloc of dev struct\n"); | |
1246 | goto err_devalloc; | |
88e58b1a | 1247 | } |
88e58b1a | 1248 | |
59277b67 BT |
1249 | mutex_init(&dev->bulk_mutex); |
1250 | dev->udev = usbdev; | |
4a4854dd | 1251 | dev->gdev = &usbdev->dev; /* our generic struct device * */ |
59277b67 BT |
1252 | dev->interface = interface; |
1253 | usb_set_intfdata(interface, dev); | |
1254 | ||
1255 | dev_info(mydev, "dlfb_probe: setting up DisplayLink device\n"); | |
1256 | ||
1257 | /* | |
1258 | * TODO: replace single 64K buffer with buffer list | |
1259 | * and async dispatch | |
1260 | */ | |
1261 | dev->buf = kmalloc(BUF_SIZE, GFP_KERNEL); | |
1262 | if (dev->buf == NULL) { | |
1263 | dev_err(mydev, "unable to allocate memory for dlfb commands\n"); | |
1264 | goto err_usballoc; | |
88e58b1a | 1265 | } |
59277b67 BT |
1266 | dev->bufend = dev->buf + BUF_SIZE; |
1267 | ||
1268 | dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1269 | usb_fill_bulk_urb(dev->tx_urb, dev->udev, | |
1270 | usb_sndbulkpipe(dev->udev, 1), dev->buf, 0, | |
1271 | dlfb_bulk_callback, dev); | |
1272 | ||
1273 | /* allocates framebuffer driver structure, not framebuffer memory */ | |
1274 | info = framebuffer_alloc(0, mydev); | |
1275 | if (!info) | |
1276 | goto err_fballoc; | |
1277 | ||
1278 | dev->info = info; | |
1279 | info->par = dev; | |
1280 | info->pseudo_palette = dev->pseudo_palette; | |
1281 | ||
1282 | var = &info->var; | |
1283 | retval = dlfb_get_var_from_edid(dev, var); | |
1284 | if (retval) { | |
1285 | /* had a problem getting edid. so fallback to 640x480 */ | |
1286 | dev_err(mydev, "Problem %d with EDID.\n", retval); | |
1287 | var->xres = 640; | |
1288 | var->yres = 480; | |
7316bc55 | 1289 | } |
88e58b1a | 1290 | |
59277b67 BT |
1291 | /* |
1292 | * ok, now that we've got the size info, we can alloc our framebuffer. | |
1293 | * We are using 16bpp. | |
1294 | */ | |
1295 | info->var.bits_per_pixel = 16; | |
1296 | info->fix = dlfb_fix; | |
1297 | info->fix.line_length = var->xres * (var->bits_per_pixel / 8); | |
1298 | videomemorysize = info->fix.line_length * var->yres; | |
1299 | ||
1300 | /* | |
1301 | * The big chunk of system memory we use as a virtual framebuffer. | |
1302 | * Pages don't need to be set RESERVED (non-swap) immediately on 2.6 | |
1303 | * remap_pfn_page() syscall in our mmap and/or defio will handle. | |
1304 | */ | |
1305 | videomemory = vmalloc(videomemorysize); | |
1306 | if (!videomemory) | |
1307 | goto err_vidmem; | |
1308 | memset(videomemory, 0, videomemorysize); | |
1309 | ||
1310 | info->screen_base = videomemory; | |
1311 | info->fix.smem_len = PAGE_ALIGN(videomemorysize); | |
1312 | info->fix.smem_start = (unsigned long) videomemory; | |
88e58b1a RDI |
1313 | info->flags = |
1314 | FBINFO_DEFAULT | FBINFO_READS_FAST | FBINFO_HWACCEL_IMAGEBLIT | | |
1315 | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT; | |
88e58b1a | 1316 | |
59277b67 BT |
1317 | /* |
1318 | * Second framebuffer copy, mirroring the state of the framebuffer | |
1319 | * on the physical USB device. We can function without this. | |
1320 | * But with imperfect damage info we may end up sending pixels over USB | |
1321 | * that were, in fact, unchanged -- wasting limited USB bandwidth | |
1322 | */ | |
1323 | dev->backing_buffer = vmalloc(dev->screen_size); | |
1324 | if (!dev->backing_buffer) | |
1325 | dev_info(mydev, "No backing buffer allocated!\n"); | |
f05e0575 | 1326 | |
59277b67 | 1327 | info->fbops = &dlfb_ops; |
88e58b1a | 1328 | |
59277b67 BT |
1329 | var->vmode = FB_VMODE_NONINTERLACED; |
1330 | var->red = red; | |
1331 | var->green = green; | |
1332 | var->blue = blue; | |
88e58b1a | 1333 | |
59277b67 BT |
1334 | /* |
1335 | * TODO: Enable FB_CONFIG_DEFIO support | |
88e58b1a | 1336 | |
59277b67 BT |
1337 | info->fbdefio = &dlfb_defio; |
1338 | fb_deferred_io_init(info); | |
88e58b1a | 1339 | |
59277b67 | 1340 | */ |
88e58b1a | 1341 | |
59277b67 BT |
1342 | retval = fb_alloc_cmap(&info->cmap, 256, 0); |
1343 | if (retval < 0) { | |
1344 | dev_err(mydev, "Failed to allocate colormap\n"); | |
1345 | goto err_cmap; | |
7316bc55 | 1346 | } |
88e58b1a | 1347 | |
59277b67 BT |
1348 | dlfb_select_std_channel(dev); |
1349 | dlfb_set_video_mode(dev, var); | |
1350 | /* TODO: dlfb_dpy_update(dev); */ | |
88e58b1a | 1351 | |
59277b67 BT |
1352 | retval = register_framebuffer(info); |
1353 | if (retval < 0) | |
1354 | goto err_regfb; | |
88e58b1a | 1355 | |
59277b67 BT |
1356 | /* paint "successful" green screen */ |
1357 | draw_rect(dev, 0, 0, dev->info->var.xres, | |
1358 | dev->info->var.yres, 0x30, 0xff, 0x30); | |
88e58b1a | 1359 | |
59277b67 BT |
1360 | dev_info(mydev, "DisplayLink USB device %d now attached, " |
1361 | "using %dK of memory\n", info->node, | |
1362 | ((dev->backing_buffer) ? | |
1363 | videomemorysize * 2 : videomemorysize) >> 10); | |
88e58b1a RDI |
1364 | return 0; |
1365 | ||
59277b67 | 1366 | err_regfb: |
88e58b1a | 1367 | fb_dealloc_cmap(&info->cmap); |
59277b67 BT |
1368 | err_cmap: |
1369 | /* TODO: fb_deferred_io_cleanup(info); */ | |
1370 | vfree(videomemory); | |
1371 | err_vidmem: | |
88e58b1a | 1372 | framebuffer_release(info); |
59277b67 BT |
1373 | err_fballoc: |
1374 | kfree(dev->buf); | |
1375 | err_usballoc: | |
88e58b1a | 1376 | usb_set_intfdata(interface, NULL); |
59277b67 BT |
1377 | usb_put_dev(dev->udev); |
1378 | kfree(dev); | |
1379 | err_devalloc: | |
1380 | return retval; | |
88e58b1a RDI |
1381 | } |
1382 | ||
1383 | static void dlfb_disconnect(struct usb_interface *interface) | |
1384 | { | |
59277b67 BT |
1385 | struct dlfb_data *dev; |
1386 | struct fb_info *info; | |
88e58b1a | 1387 | |
59277b67 | 1388 | dev = usb_get_intfdata(interface); |
88e58b1a | 1389 | usb_set_intfdata(interface, NULL); |
59277b67 BT |
1390 | usb_put_dev(dev->udev); |
1391 | ||
1392 | /* | |
1393 | * TODO: since, upon usb disconnect(), usb will cancel in-flight urbs | |
1394 | * and error out any new ones, look at eliminating need for mutex | |
1395 | */ | |
1396 | mutex_lock(&dev->bulk_mutex); | |
1397 | dev->interface = NULL; | |
1398 | info = dev->info; | |
1399 | mutex_unlock(&dev->bulk_mutex); | |
1400 | ||
1401 | if (info) { | |
1402 | dev_info(&interface->dev, "Detaching DisplayLink device %d.\n", | |
1403 | info->node); | |
1404 | unregister_framebuffer(info); | |
1405 | fb_dealloc_cmap(&info->cmap); | |
1406 | /* TODO: fb_deferred_io_cleanup(info); */ | |
1407 | fb_dealloc_cmap(&info->cmap); | |
1408 | vfree((void __force *)info->screen_base); | |
1409 | framebuffer_release(info); | |
88e58b1a RDI |
1410 | } |
1411 | ||
59277b67 BT |
1412 | if (dev->backing_buffer) |
1413 | vfree(dev->backing_buffer); | |
88e58b1a | 1414 | |
59277b67 | 1415 | kfree(dev); |
88e58b1a RDI |
1416 | } |
1417 | ||
1418 | static struct usb_driver dlfb_driver = { | |
1419 | .name = "udlfb", | |
1420 | .probe = dlfb_probe, | |
1421 | .disconnect = dlfb_disconnect, | |
1422 | .id_table = id_table, | |
1423 | }; | |
1424 | ||
1425 | static int __init dlfb_init(void) | |
1426 | { | |
1427 | int res; | |
1428 | ||
88e58b1a RDI |
1429 | res = usb_register(&dlfb_driver); |
1430 | if (res) | |
1431 | err("usb_register failed. Error number %d", res); | |
1432 | ||
1433 | printk("VMODES initialized\n"); | |
1434 | ||
1435 | return res; | |
1436 | } | |
1437 | ||
1438 | static void __exit dlfb_exit(void) | |
1439 | { | |
1440 | usb_deregister(&dlfb_driver); | |
1441 | } | |
1442 | ||
1443 | module_init(dlfb_init); | |
1444 | module_exit(dlfb_exit); | |
1445 | ||
4a4854dd BT |
1446 | static void dlfb_urb_completion(struct urb *urb) |
1447 | { | |
1448 | struct urb_node *unode = urb->context; | |
1449 | struct dlfb_data *dev = unode->dev; | |
1450 | unsigned long flags; | |
1451 | ||
1452 | /* sync/async unlink faults aren't errors */ | |
1453 | if (urb->status) { | |
1454 | if (!(urb->status == -ENOENT || | |
1455 | urb->status == -ECONNRESET || | |
1456 | urb->status == -ESHUTDOWN)) { | |
1457 | dl_err("%s - nonzero write bulk status received: %d\n", | |
1458 | __func__, urb->status); | |
1459 | atomic_set(&dev->lost_pixels, 1); | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | urb->transfer_buffer_length = dev->urbs.size; /* reset to actual */ | |
1464 | ||
1465 | spin_lock_irqsave(&dev->urbs.lock, flags); | |
1466 | list_add_tail(&unode->entry, &dev->urbs.list); | |
1467 | dev->urbs.available++; | |
1468 | spin_unlock_irqrestore(&dev->urbs.lock, flags); | |
1469 | ||
1470 | up(&dev->urbs.limit_sem); | |
1471 | } | |
1472 | ||
1473 | static void dlfb_free_urb_list(struct dlfb_data *dev) | |
1474 | { | |
1475 | int count = dev->urbs.count; | |
1476 | struct list_head *node; | |
1477 | struct urb_node *unode; | |
1478 | struct urb *urb; | |
1479 | int ret; | |
1480 | unsigned long flags; | |
1481 | ||
1482 | dl_notice("Waiting for completes and freeing all render urbs\n"); | |
1483 | ||
1484 | /* keep waiting and freeing, until we've got 'em all */ | |
1485 | while (count--) { | |
1486 | /* Timeout means a memory leak and/or fault */ | |
1487 | ret = down_timeout(&dev->urbs.limit_sem, FREE_URB_TIMEOUT); | |
1488 | if (ret) { | |
1489 | BUG_ON(ret); | |
1490 | break; | |
1491 | } | |
1492 | spin_lock_irqsave(&dev->urbs.lock, flags); | |
1493 | ||
1494 | node = dev->urbs.list.next; /* have reserved one with sem */ | |
1495 | list_del_init(node); | |
1496 | ||
1497 | spin_unlock_irqrestore(&dev->urbs.lock, flags); | |
1498 | ||
1499 | unode = list_entry(node, struct urb_node, entry); | |
1500 | urb = unode->urb; | |
1501 | ||
1502 | /* Free each separately allocated piece */ | |
1503 | usb_buffer_free(urb->dev, dev->urbs.size, | |
1504 | urb->transfer_buffer, urb->transfer_dma); | |
1505 | usb_free_urb(urb); | |
1506 | kfree(node); | |
1507 | } | |
1508 | ||
1509 | kref_put(&dev->kref, dlfb_delete); | |
1510 | ||
1511 | } | |
1512 | ||
1513 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size) | |
1514 | { | |
1515 | int i = 0; | |
1516 | struct urb *urb; | |
1517 | struct urb_node *unode; | |
1518 | char *buf; | |
1519 | ||
1520 | spin_lock_init(&dev->urbs.lock); | |
1521 | ||
1522 | dev->urbs.size = size; | |
1523 | INIT_LIST_HEAD(&dev->urbs.list); | |
1524 | ||
1525 | while (i < count) { | |
1526 | unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL); | |
1527 | if (!unode) | |
1528 | break; | |
1529 | unode->dev = dev; | |
1530 | ||
1531 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
1532 | if (!urb) { | |
1533 | kfree(unode); | |
1534 | break; | |
1535 | } | |
1536 | unode->urb = urb; | |
1537 | ||
1538 | buf = usb_buffer_alloc(dev->udev, MAX_TRANSFER, GFP_KERNEL, | |
1539 | &urb->transfer_dma); | |
1540 | if (!buf) { | |
1541 | kfree(unode); | |
1542 | usb_free_urb(urb); | |
1543 | break; | |
1544 | } | |
1545 | ||
1546 | /* urb->transfer_buffer_length set to actual before submit */ | |
1547 | usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 1), | |
1548 | buf, size, dlfb_urb_completion, unode); | |
1549 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1550 | ||
1551 | list_add_tail(&unode->entry, &dev->urbs.list); | |
1552 | ||
1553 | i++; | |
1554 | } | |
1555 | ||
1556 | sema_init(&dev->urbs.limit_sem, i); | |
1557 | dev->urbs.count = i; | |
1558 | dev->urbs.available = i; | |
1559 | ||
1560 | kref_get(&dev->kref); /* released in free_render_urbs() */ | |
1561 | ||
1562 | dl_notice("allocated %d %d byte urbs \n", i, (int) size); | |
1563 | ||
1564 | return i; | |
1565 | } | |
1566 | ||
1567 | static struct urb *dlfb_get_urb(struct dlfb_data *dev) | |
1568 | { | |
1569 | int ret = 0; | |
1570 | struct list_head *entry; | |
1571 | struct urb_node *unode; | |
1572 | struct urb *urb = NULL; | |
1573 | unsigned long flags; | |
1574 | ||
1575 | /* Wait for an in-flight buffer to complete and get re-queued */ | |
1576 | ret = down_timeout(&dev->urbs.limit_sem, GET_URB_TIMEOUT); | |
1577 | if (ret) { | |
1578 | atomic_set(&dev->lost_pixels, 1); | |
1579 | dl_err("wait for urb interrupted: %x\n", ret); | |
1580 | goto error; | |
1581 | } | |
1582 | ||
1583 | spin_lock_irqsave(&dev->urbs.lock, flags); | |
1584 | ||
1585 | BUG_ON(list_empty(&dev->urbs.list)); /* reserved one with limit_sem */ | |
1586 | entry = dev->urbs.list.next; | |
1587 | list_del_init(entry); | |
1588 | dev->urbs.available--; | |
1589 | ||
1590 | spin_unlock_irqrestore(&dev->urbs.lock, flags); | |
1591 | ||
1592 | unode = list_entry(entry, struct urb_node, entry); | |
1593 | urb = unode->urb; | |
1594 | ||
1595 | error: | |
1596 | return urb; | |
1597 | } | |
1598 | ||
1599 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb *urb, size_t len) | |
1600 | { | |
1601 | int ret; | |
1602 | ||
1603 | BUG_ON(len > dev->urbs.size); | |
1604 | ||
1605 | urb->transfer_buffer_length = len; /* set to actual payload len */ | |
1606 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1607 | if (ret) { | |
1608 | dlfb_urb_completion(urb); /* because no one else will */ | |
1609 | atomic_set(&dev->lost_pixels, 1); | |
1610 | dl_err("usb_submit_urb error %x\n", ret); | |
1611 | } | |
1612 | return ret; | |
1613 | } | |
1614 | ||
59277b67 BT |
1615 | MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>, " |
1616 | "Jaya Kumar <jayakumar.lkml@gmail.com>"); | |
88e58b1a RDI |
1617 | MODULE_DESCRIPTION(DRIVER_VERSION); |
1618 | MODULE_LICENSE("GPL"); |