Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 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 | */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 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> |
Amit Kucheria | fb29900 | 2009-07-27 12:01:03 +0300 | [diff] [blame] | 26 | #include <linux/vmalloc.h> |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 27 | |
| 28 | #include "udlfb.h" |
| 29 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 30 | #define DRIVER_VERSION "DisplayLink Framebuffer Driver 0.4.1" |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 31 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 32 | static struct fb_fix_screeninfo dlfb_fix = { |
| 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, |
| 40 | }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 41 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 42 | #define NR_USB_REQUEST_I2C_SUB_IO 0x02 |
| 43 | #define NR_USB_REQUEST_CHANNEL 0x12 |
| 44 | |
| 45 | /* |
| 46 | * Inserts a specific DisplayLink controller command into the provided |
| 47 | * buffer. |
| 48 | */ |
| 49 | static char *insert_command(char *buf, u8 reg, u8 val) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 50 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 51 | *buf++ = 0xAF; |
| 52 | *buf++ = 0x20; |
| 53 | *buf++ = reg; |
| 54 | *buf++ = val; |
| 55 | return buf; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 56 | } |
| 57 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 58 | static char *insert_vidreg_lock(char *buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 59 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 60 | return insert_command(buf, 0xFF, 0x00); |
| 61 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 62 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 63 | static char *insert_vidreg_unlock(char *buf) |
| 64 | { |
| 65 | return insert_command(buf, 0xFF, 0xFF); |
| 66 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 67 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 68 | /* |
| 69 | * Once you send this command, the DisplayLink framebuffer gets driven to the |
| 70 | * display. |
| 71 | */ |
| 72 | static char *insert_enable_hvsync(char *buf) |
| 73 | { |
| 74 | return insert_command(buf, 0x1F, 0x00); |
| 75 | } |
| 76 | |
| 77 | static char *insert_set_color_depth(char *buf, u8 selection) |
| 78 | { |
| 79 | return insert_command(buf, 0x00, selection); |
| 80 | } |
| 81 | |
| 82 | static char *insert_set_base16bpp(char *wrptr, u32 base) |
| 83 | { |
| 84 | /* the base pointer is 16 bits wide, 0x20 is hi byte. */ |
| 85 | wrptr = insert_command(wrptr, 0x20, base >> 16); |
| 86 | wrptr = insert_command(wrptr, 0x21, base >> 8); |
| 87 | return insert_command(wrptr, 0x22, base); |
| 88 | } |
| 89 | |
| 90 | static char *insert_set_base8bpp(char *wrptr, u32 base) |
| 91 | { |
| 92 | wrptr = insert_command(wrptr, 0x26, base >> 16); |
| 93 | wrptr = insert_command(wrptr, 0x27, base >> 8); |
| 94 | return insert_command(wrptr, 0x28, base); |
| 95 | } |
| 96 | |
| 97 | static char *insert_command_16(char *wrptr, u8 reg, u16 value) |
| 98 | { |
| 99 | wrptr = insert_command(wrptr, reg, value >> 8); |
| 100 | return insert_command(wrptr, reg+1, value); |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | * This is kind of weird because the controller takes some |
| 105 | * register values in a different byte order than other registers. |
| 106 | */ |
| 107 | static char *insert_command_16be(char *wrptr, u8 reg, u16 value) |
| 108 | { |
| 109 | wrptr = insert_command(wrptr, reg, value); |
| 110 | return insert_command(wrptr, reg+1, value >> 8); |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * LFSR is linear feedback shift register. The reason we have this is |
| 115 | * because the display controller needs to minimize the clock depth of |
| 116 | * various counters used in the display path. So this code reverses the |
| 117 | * provided value into the lfsr16 value by counting backwards to get |
| 118 | * the value that needs to be set in the hardware comparator to get the |
| 119 | * same actual count. This makes sense once you read above a couple of |
| 120 | * times and think about it from a hardware perspective. |
| 121 | */ |
| 122 | static u16 lfsr16(u16 actual_count) |
| 123 | { |
| 124 | u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */ |
| 125 | |
| 126 | while (actual_count--) { |
| 127 | lv = ((lv << 1) | |
| 128 | (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1)) |
| 129 | & 0xFFFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 130 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 131 | |
| 132 | return (u16) lv; |
| 133 | } |
| 134 | |
| 135 | /* |
| 136 | * This does LFSR conversion on the value that is to be written. |
| 137 | * See LFSR explanation above for more detail. |
| 138 | */ |
| 139 | static char *insert_command_lfsr16(char *wrptr, u8 reg, u16 value) |
| 140 | { |
| 141 | return insert_command_16(wrptr, reg, lfsr16(value)); |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * This takes a standard fbdev screeninfo struct and all of its monitor mode |
| 146 | * details and converts them into the DisplayLink equivalent register commands. |
| 147 | */ |
| 148 | static char *insert_set_vid_cmds(char *wrptr, struct fb_var_screeninfo *var) |
| 149 | { |
| 150 | u16 xds, yds; |
| 151 | u16 xde, yde; |
| 152 | u16 yec; |
| 153 | |
| 154 | |
| 155 | /* x display start */ |
| 156 | xds = var->left_margin + var->hsync_len; |
| 157 | wrptr = insert_command_lfsr16(wrptr, 0x01, xds); |
| 158 | /* x display end */ |
| 159 | xde = xds + var->xres; |
| 160 | wrptr = insert_command_lfsr16(wrptr, 0x03, xde); |
| 161 | |
| 162 | /* y display start */ |
| 163 | yds = var->upper_margin + var->vsync_len; |
| 164 | wrptr = insert_command_lfsr16(wrptr, 0x05, yds); |
| 165 | /* y display end */ |
| 166 | yde = yds + var->yres; |
| 167 | wrptr = insert_command_lfsr16(wrptr, 0x07, yde); |
| 168 | |
| 169 | /* x end count is active + blanking - 1 */ |
| 170 | wrptr = insert_command_lfsr16(wrptr, 0x09, xde + var->right_margin - 1); |
| 171 | |
| 172 | /* libdlo hardcodes hsync start to 1 */ |
| 173 | wrptr = insert_command_lfsr16(wrptr, 0x0B, 1); |
| 174 | |
| 175 | /* hsync end is width of sync pulse + 1 */ |
| 176 | wrptr = insert_command_lfsr16(wrptr, 0x0D, var->hsync_len + 1); |
| 177 | |
| 178 | /* hpixels is active pixels */ |
| 179 | wrptr = insert_command_16(wrptr, 0x0F, var->xres); |
| 180 | |
| 181 | /* yendcount is vertical active + vertical blanking */ |
| 182 | yec = var->yres + var->upper_margin + var->lower_margin + |
| 183 | var->vsync_len; |
| 184 | wrptr = insert_command_lfsr16(wrptr, 0x11, yec); |
| 185 | |
| 186 | /* libdlo hardcodes vsync start to 0 */ |
| 187 | wrptr = insert_command_lfsr16(wrptr, 0x13, 0); |
| 188 | |
| 189 | /* vsync end is width of vsync pulse */ |
| 190 | wrptr = insert_command_lfsr16(wrptr, 0x15, var->vsync_len); |
| 191 | |
| 192 | /* vpixels is active pixels */ |
| 193 | wrptr = insert_command_16(wrptr, 0x17, var->yres); |
| 194 | |
| 195 | /* convert picoseconds to 5kHz multiple for pclk5k = x * 1E12/5k */ |
| 196 | wrptr = insert_command_16be(wrptr, 0x1B, 200*1000*1000/var->pixclock); |
| 197 | |
| 198 | return wrptr; |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * This takes a standard fbdev screeninfo struct that was fetched or prepared |
| 203 | * and then generates the appropriate command sequence that then drives the |
| 204 | * display controller. |
| 205 | */ |
| 206 | static int dlfb_set_video_mode(struct dlfb_data *dev, |
| 207 | struct fb_var_screeninfo *var) |
| 208 | { |
| 209 | char *buf; |
| 210 | char *wrptr; |
| 211 | int retval = 0; |
| 212 | int writesize; |
| 213 | |
| 214 | buf = dev->buf; |
| 215 | |
| 216 | /* |
| 217 | * This first section has to do with setting the base address on the |
| 218 | * controller * associated with the display. There are 2 base |
| 219 | * pointers, currently, we only * use the 16 bpp segment. |
| 220 | */ |
| 221 | wrptr = insert_vidreg_lock(buf); |
| 222 | wrptr = insert_set_color_depth(wrptr, 0x00); |
| 223 | /* set base for 16bpp segment to 0 */ |
| 224 | wrptr = insert_set_base16bpp(wrptr, 0); |
| 225 | /* set base for 8bpp segment to end of fb */ |
| 226 | wrptr = insert_set_base8bpp(wrptr, dev->info->fix.smem_len); |
| 227 | |
| 228 | wrptr = insert_set_vid_cmds(wrptr, var); |
| 229 | wrptr = insert_enable_hvsync(wrptr); |
| 230 | wrptr = insert_vidreg_unlock(wrptr); |
| 231 | |
| 232 | writesize = wrptr - buf; |
| 233 | |
| 234 | mutex_lock(&dev->bulk_mutex); |
| 235 | if (!dev->interface) { /* disconnect() was called */ |
| 236 | mutex_unlock(&dev->bulk_mutex); |
| 237 | retval = -ENODEV; |
| 238 | goto error; |
| 239 | } |
| 240 | |
| 241 | retval = dlfb_bulk_msg(dev, writesize); |
| 242 | mutex_unlock(&dev->bulk_mutex); |
| 243 | if (retval) { |
| 244 | dev_err(&dev->udev->dev, "Problem %d with submit write bulk.\n", |
| 245 | retval); |
| 246 | goto error; |
| 247 | } |
| 248 | |
| 249 | return 0; |
| 250 | |
| 251 | error: |
| 252 | return retval; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * This is necessary before we can communicate with the display controller. |
| 257 | */ |
| 258 | static int dlfb_select_std_channel(struct dlfb_data *dev) |
| 259 | { |
| 260 | int ret; |
| 261 | u8 set_def_chn[] = { 0x57, 0xCD, 0xDC, 0xA7, |
| 262 | 0x1C, 0x88, 0x5E, 0x15, |
| 263 | 0x60, 0xFE, 0xC6, 0x97, |
| 264 | 0x16, 0x3D, 0x47, 0xF2 }; |
| 265 | |
| 266 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), |
| 267 | NR_USB_REQUEST_CHANNEL, |
| 268 | (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0, |
| 269 | set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT); |
| 270 | return ret; |
| 271 | } |
| 272 | |
| 273 | |
| 274 | /* |
| 275 | * Query EDID from the handware, then hand it off to fbdev's edid parse |
| 276 | * routine which should give us back a filled in screeninfo structure. |
| 277 | */ |
| 278 | static int dlfb_get_var_from_edid(struct dlfb_data *dev, |
| 279 | struct fb_var_screeninfo *var) |
| 280 | { |
| 281 | int ret; |
| 282 | |
| 283 | dlfb_edid(dev); |
| 284 | ret = fb_parse_edid(dev->edid, var); |
| 285 | |
| 286 | return ret; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static int dlfb_mmap(struct fb_info *info, struct vm_area_struct *vma) |
| 290 | { |
| 291 | unsigned long start = vma->vm_start; |
| 292 | unsigned long size = vma->vm_end - vma->vm_start; |
| 293 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; |
| 294 | unsigned long page, pos; |
| 295 | |
| 296 | printk("MMAP: %lu %u\n", offset + size, info->fix.smem_len); |
| 297 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 298 | if (offset + size > info->fix.smem_len) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 299 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 300 | |
| 301 | pos = (unsigned long)info->fix.smem_start + offset; |
| 302 | |
| 303 | while (size > 0) { |
| 304 | page = vmalloc_to_pfn((void *)pos); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 305 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 306 | return -EAGAIN; |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 307 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 308 | start += PAGE_SIZE; |
| 309 | pos += PAGE_SIZE; |
| 310 | if (size > PAGE_SIZE) |
| 311 | size -= PAGE_SIZE; |
| 312 | else |
| 313 | size = 0; |
| 314 | } |
| 315 | |
| 316 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ |
| 317 | return 0; |
| 318 | |
| 319 | } |
| 320 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 321 | /* ioctl structure */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 322 | struct dloarea { |
| 323 | int x, y; |
| 324 | int w, h; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 325 | int x2, y2; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 326 | }; |
| 327 | |
| 328 | /* |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 329 | * There are many DisplayLink-based products, all with unique PIDs. We are able |
| 330 | * to support all volume ones (circa 2009) with a single driver, so we match |
| 331 | * globally on VID. TODO: Probe() needs to detect when we might be running |
| 332 | * "future" chips, and bail on those, so a compatible driver can match. |
| 333 | */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 334 | static struct usb_device_id id_table[] = { |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 335 | {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 336 | {}, |
| 337 | }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 338 | MODULE_DEVICE_TABLE(usb, id_table); |
| 339 | |
| 340 | static struct usb_driver dlfb_driver; |
| 341 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 342 | // thanks to Henrik Bjerregaard Pedersen for this function |
| 343 | static char *rle_compress16(uint16_t * src, char *dst, int rem) |
| 344 | { |
| 345 | |
| 346 | int rl; |
| 347 | uint16_t pix0; |
| 348 | char *end_if_raw = dst + 6 + 2 * rem; |
| 349 | |
| 350 | dst += 6; // header will be filled in if RLE is worth it |
| 351 | |
| 352 | while (rem && dst < end_if_raw) { |
| 353 | char *start = (char *)src; |
| 354 | |
| 355 | pix0 = *src++; |
| 356 | rl = 1; |
| 357 | rem--; |
| 358 | while (rem && *src == pix0) |
| 359 | rem--, rl++, src++; |
| 360 | *dst++ = rl; |
| 361 | *dst++ = start[1]; |
| 362 | *dst++ = start[0]; |
| 363 | } |
| 364 | |
| 365 | return dst; |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | Thanks to Henrik Bjerregaard Pedersen for rle implementation and code refactoring. |
| 370 | Next step is huffman compression. |
| 371 | */ |
| 372 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 373 | static int |
| 374 | image_blit(struct dlfb_data *dev_info, int x, int y, int width, int height, |
| 375 | char *data) |
| 376 | { |
| 377 | |
| 378 | int i, j, base; |
| 379 | int rem = width; |
| 380 | int ret; |
| 381 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 382 | int firstdiff, thistime; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 383 | |
| 384 | char *bufptr; |
| 385 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 386 | if (x + width > dev_info->info->var.xres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 387 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 388 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 389 | if (y + height > dev_info->info->var.yres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 390 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 391 | |
| 392 | mutex_lock(&dev_info->bulk_mutex); |
| 393 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 394 | base = |
| 395 | dev_info->base16 + ((dev_info->info->var.xres * 2 * y) + (x * 2)); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 396 | |
| 397 | data += (dev_info->info->var.xres * 2 * y) + (x * 2); |
| 398 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 399 | /* printk("IMAGE_BLIT\n"); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 400 | |
| 401 | bufptr = dev_info->buf; |
| 402 | |
| 403 | for (i = y; i < y + height; i++) { |
| 404 | |
| 405 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 406 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 407 | bufptr = dev_info->buf; |
| 408 | } |
| 409 | |
| 410 | rem = width; |
| 411 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 412 | /* printk("WRITING LINE %d\n", i); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 413 | |
| 414 | while (rem) { |
| 415 | |
| 416 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 417 | ret = |
| 418 | dlfb_bulk_msg(dev_info, |
| 419 | bufptr - dev_info->buf); |
| 420 | bufptr = dev_info->buf; |
| 421 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 422 | // number of pixels to consider this time |
| 423 | thistime = rem; |
| 424 | if (thistime > 255) |
| 425 | thistime = 255; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 426 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 427 | if (dev_info->backing_buffer) { |
| 428 | /* find first pixel that has changed */ |
| 429 | firstdiff = -1; |
| 430 | for (j = 0; j < thistime * 2; j++) { |
| 431 | if (dev_info->backing_buffer |
| 432 | [base - dev_info->base16 + j] |
| 433 | != data[j]) { |
| 434 | firstdiff = j / 2; |
| 435 | break; |
| 436 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 437 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 438 | |
| 439 | } else { |
| 440 | firstdiff = 0; |
| 441 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 444 | if (firstdiff >= 0) { |
| 445 | char *end_of_rle; |
| 446 | |
| 447 | end_of_rle = |
| 448 | rle_compress16((uint16_t *) (data + |
| 449 | firstdiff * 2), |
| 450 | bufptr, |
| 451 | thistime - firstdiff); |
| 452 | |
| 453 | if (end_of_rle < |
| 454 | bufptr + 6 + 2 * (thistime - firstdiff)) { |
| 455 | bufptr[0] = 0xAF; |
| 456 | bufptr[1] = 0x69; |
| 457 | |
| 458 | bufptr[2] = |
| 459 | (char)((base + |
| 460 | firstdiff * 2) >> 16); |
| 461 | bufptr[3] = |
| 462 | (char)((base + firstdiff * 2) >> 8); |
| 463 | bufptr[4] = |
| 464 | (char)(base + firstdiff * 2); |
| 465 | bufptr[5] = thistime - firstdiff; |
| 466 | |
| 467 | bufptr = end_of_rle; |
| 468 | |
| 469 | } else { |
| 470 | // fallback to raw (or some other encoding?) |
| 471 | *bufptr++ = 0xAF; |
| 472 | *bufptr++ = 0x68; |
| 473 | |
| 474 | *bufptr++ = |
| 475 | (char)((base + |
| 476 | firstdiff * 2) >> 16); |
| 477 | *bufptr++ = |
| 478 | (char)((base + firstdiff * 2) >> 8); |
| 479 | *bufptr++ = |
| 480 | (char)(base + firstdiff * 2); |
| 481 | *bufptr++ = thistime - firstdiff; |
| 482 | // PUT COMPRESSION HERE |
| 483 | for (j = firstdiff * 2; |
| 484 | j < thistime * 2; j += 2) { |
| 485 | *bufptr++ = data[j + 1]; |
| 486 | *bufptr++ = data[j]; |
| 487 | } |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | base += thistime * 2; |
| 492 | data += thistime * 2; |
| 493 | rem -= thistime; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 494 | } |
| 495 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 496 | if (dev_info->backing_buffer) |
| 497 | memcpy(dev_info->backing_buffer + |
| 498 | (base - dev_info->base16) - |
| 499 | (width * 2), data - (width * 2), width * 2); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 500 | |
| 501 | base += (dev_info->info->var.xres * 2) - (width * 2); |
| 502 | data += (dev_info->info->var.xres * 2) - (width * 2); |
| 503 | |
| 504 | } |
| 505 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 506 | if (bufptr > dev_info->buf) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 507 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 508 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 509 | |
| 510 | mutex_unlock(&dev_info->bulk_mutex); |
| 511 | |
| 512 | return base; |
| 513 | |
| 514 | } |
| 515 | |
| 516 | static int |
| 517 | draw_rect(struct dlfb_data *dev_info, int x, int y, int width, int height, |
| 518 | unsigned char red, unsigned char green, unsigned char blue) |
| 519 | { |
| 520 | |
| 521 | int i, j, base; |
| 522 | int ret; |
| 523 | unsigned short col = |
| 524 | (((((red) & 0xF8) | ((green) >> 5)) & 0xFF) << 8) + |
| 525 | (((((green) & 0x1C) << 3) | ((blue) >> 3)) & 0xFF); |
| 526 | int rem = width; |
| 527 | |
| 528 | char *bufptr; |
| 529 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 530 | if (x + width > dev_info->info->var.xres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 531 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 532 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 533 | if (y + height > dev_info->info->var.yres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 534 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 535 | |
| 536 | mutex_lock(&dev_info->bulk_mutex); |
| 537 | |
| 538 | base = dev_info->base16 + (dev_info->info->var.xres * 2 * y) + (x * 2); |
| 539 | |
| 540 | bufptr = dev_info->buf; |
| 541 | |
| 542 | for (i = y; i < y + height; i++) { |
| 543 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 544 | if (dev_info->backing_buffer) { |
| 545 | for (j = 0; j < width * 2; j += 2) { |
| 546 | dev_info->backing_buffer |
| 547 | [base - dev_info->base16 + j] = |
| 548 | (char)(col >> 8); |
| 549 | dev_info->backing_buffer |
| 550 | [base - dev_info->base16 + j + 1] = |
| 551 | (char)(col); |
| 552 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 553 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 554 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 555 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 556 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 557 | bufptr = dev_info->buf; |
| 558 | } |
| 559 | |
| 560 | rem = width; |
| 561 | |
| 562 | while (rem) { |
| 563 | |
| 564 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 565 | ret = |
| 566 | dlfb_bulk_msg(dev_info, |
| 567 | bufptr - dev_info->buf); |
| 568 | bufptr = dev_info->buf; |
| 569 | } |
| 570 | |
| 571 | *bufptr++ = 0xAF; |
| 572 | *bufptr++ = 0x69; |
| 573 | |
| 574 | *bufptr++ = (char)(base >> 16); |
| 575 | *bufptr++ = (char)(base >> 8); |
| 576 | *bufptr++ = (char)(base); |
| 577 | |
| 578 | if (rem > 255) { |
| 579 | *bufptr++ = 255; |
| 580 | *bufptr++ = 255; |
| 581 | rem -= 255; |
| 582 | base += 255 * 2; |
| 583 | } else { |
| 584 | *bufptr++ = rem; |
| 585 | *bufptr++ = rem; |
| 586 | base += rem * 2; |
| 587 | rem = 0; |
| 588 | } |
| 589 | |
| 590 | *bufptr++ = (char)(col >> 8); |
| 591 | *bufptr++ = (char)(col); |
| 592 | |
| 593 | } |
| 594 | |
| 595 | base += (dev_info->info->var.xres * 2) - (width * 2); |
| 596 | |
| 597 | } |
| 598 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 599 | if (bufptr > dev_info->buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 600 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 601 | |
| 602 | mutex_unlock(&dev_info->bulk_mutex); |
| 603 | |
| 604 | return 1; |
| 605 | } |
| 606 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 607 | static void swapfb(struct dlfb_data *dev_info) |
| 608 | { |
| 609 | |
| 610 | int tmpbase; |
| 611 | char *bufptr; |
| 612 | |
| 613 | mutex_lock(&dev_info->bulk_mutex); |
| 614 | |
| 615 | tmpbase = dev_info->base16; |
| 616 | |
| 617 | dev_info->base16 = dev_info->base16d; |
| 618 | dev_info->base16d = tmpbase; |
| 619 | |
| 620 | bufptr = dev_info->buf; |
| 621 | |
| 622 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); |
| 623 | |
| 624 | // set addresses |
| 625 | bufptr = |
| 626 | dlfb_set_register(bufptr, 0x20, (char)(dev_info->base16 >> 16)); |
| 627 | bufptr = dlfb_set_register(bufptr, 0x21, (char)(dev_info->base16 >> 8)); |
| 628 | bufptr = dlfb_set_register(bufptr, 0x22, (char)(dev_info->base16)); |
| 629 | |
| 630 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); |
| 631 | |
| 632 | dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 633 | |
| 634 | mutex_unlock(&dev_info->bulk_mutex); |
| 635 | } |
| 636 | |
| 637 | static int copyfb(struct dlfb_data *dev_info) |
| 638 | { |
| 639 | int base; |
| 640 | int source; |
| 641 | int rem; |
| 642 | int i, ret; |
| 643 | |
| 644 | char *bufptr; |
| 645 | |
| 646 | base = dev_info->base16d; |
| 647 | |
| 648 | mutex_lock(&dev_info->bulk_mutex); |
| 649 | |
| 650 | source = dev_info->base16; |
| 651 | |
| 652 | bufptr = dev_info->buf; |
| 653 | |
| 654 | for (i = 0; i < dev_info->info->var.yres; i++) { |
| 655 | |
| 656 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 657 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 658 | bufptr = dev_info->buf; |
| 659 | } |
| 660 | |
| 661 | rem = dev_info->info->var.xres; |
| 662 | |
| 663 | while (rem) { |
| 664 | |
| 665 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 666 | ret = |
| 667 | dlfb_bulk_msg(dev_info, |
| 668 | bufptr - dev_info->buf); |
| 669 | bufptr = dev_info->buf; |
| 670 | |
| 671 | } |
| 672 | |
| 673 | *bufptr++ = 0xAF; |
| 674 | *bufptr++ = 0x6A; |
| 675 | |
| 676 | *bufptr++ = (char)(base >> 16); |
| 677 | *bufptr++ = (char)(base >> 8); |
| 678 | *bufptr++ = (char)(base); |
| 679 | |
| 680 | if (rem > 255) { |
| 681 | *bufptr++ = 255; |
| 682 | *bufptr++ = (char)(source >> 16); |
| 683 | *bufptr++ = (char)(source >> 8); |
| 684 | *bufptr++ = (char)(source); |
| 685 | |
| 686 | rem -= 255; |
| 687 | base += 255 * 2; |
| 688 | source += 255 * 2; |
| 689 | |
| 690 | } else { |
| 691 | *bufptr++ = rem; |
| 692 | *bufptr++ = (char)(source >> 16); |
| 693 | *bufptr++ = (char)(source >> 8); |
| 694 | *bufptr++ = (char)(source); |
| 695 | |
| 696 | base += rem * 2; |
| 697 | source += rem * 2; |
| 698 | rem = 0; |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | if (bufptr > dev_info->buf) |
| 704 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 705 | |
| 706 | mutex_unlock(&dev_info->bulk_mutex); |
| 707 | |
| 708 | return 1; |
| 709 | |
| 710 | } |
| 711 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 712 | static int |
| 713 | copyarea(struct dlfb_data *dev_info, int dx, int dy, int sx, int sy, |
| 714 | int width, int height) |
| 715 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 716 | int base; |
| 717 | int source; |
| 718 | int rem; |
| 719 | int i, ret; |
| 720 | |
| 721 | char *bufptr; |
| 722 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 723 | if (dx + width > dev_info->info->var.xres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 724 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 725 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 726 | if (dy + height > dev_info->info->var.yres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 727 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 728 | |
| 729 | mutex_lock(&dev_info->bulk_mutex); |
| 730 | |
| 731 | base = |
| 732 | dev_info->base16 + (dev_info->info->var.xres * 2 * dy) + (dx * 2); |
| 733 | source = (dev_info->info->var.xres * 2 * sy) + (sx * 2); |
| 734 | |
| 735 | bufptr = dev_info->buf; |
| 736 | |
| 737 | for (i = sy; i < sy + height; i++) { |
| 738 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 739 | memcpy(dev_info->backing_buffer + base - dev_info->base16, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 740 | dev_info->backing_buffer + source, width * 2); |
| 741 | |
| 742 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 743 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 744 | bufptr = dev_info->buf; |
| 745 | } |
| 746 | |
| 747 | rem = width; |
| 748 | |
| 749 | while (rem) { |
| 750 | |
| 751 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 752 | ret = |
| 753 | dlfb_bulk_msg(dev_info, |
| 754 | bufptr - dev_info->buf); |
| 755 | bufptr = dev_info->buf; |
| 756 | } |
| 757 | |
| 758 | *bufptr++ = 0xAF; |
| 759 | *bufptr++ = 0x6A; |
| 760 | |
| 761 | *bufptr++ = (char)(base >> 16); |
| 762 | *bufptr++ = (char)(base >> 8); |
| 763 | *bufptr++ = (char)(base); |
| 764 | |
| 765 | if (rem > 255) { |
| 766 | *bufptr++ = 255; |
| 767 | *bufptr++ = (char)(source >> 16); |
| 768 | *bufptr++ = (char)(source >> 8); |
| 769 | *bufptr++ = (char)(source); |
| 770 | |
| 771 | rem -= 255; |
| 772 | base += 255 * 2; |
| 773 | source += 255 * 2; |
| 774 | |
| 775 | } else { |
| 776 | *bufptr++ = rem; |
| 777 | *bufptr++ = (char)(source >> 16); |
| 778 | *bufptr++ = (char)(source >> 8); |
| 779 | *bufptr++ = (char)(source); |
| 780 | |
| 781 | base += rem * 2; |
| 782 | source += rem * 2; |
| 783 | rem = 0; |
| 784 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 785 | } |
| 786 | |
| 787 | base += (dev_info->info->var.xres * 2) - (width * 2); |
| 788 | source += (dev_info->info->var.xres * 2) - (width * 2); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 789 | } |
| 790 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 791 | if (bufptr > dev_info->buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 792 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 793 | |
| 794 | mutex_unlock(&dev_info->bulk_mutex); |
| 795 | |
| 796 | return 1; |
| 797 | } |
| 798 | |
Greg Kroah-Hartman | 4b6a485 | 2009-06-03 14:47:21 -0700 | [diff] [blame] | 799 | static void dlfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 800 | { |
| 801 | |
| 802 | struct dlfb_data *dev = info->par; |
| 803 | |
| 804 | copyarea(dev, area->dx, area->dy, area->sx, area->sy, area->width, |
| 805 | area->height); |
| 806 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 807 | /* printk("COPY AREA %d %d %d %d %d %d !!!\n", area->dx, area->dy, area->sx, area->sy, area->width, area->height); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 808 | |
| 809 | } |
| 810 | |
Greg Kroah-Hartman | 4b6a485 | 2009-06-03 14:47:21 -0700 | [diff] [blame] | 811 | static void dlfb_imageblit(struct fb_info *info, const struct fb_image *image) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 812 | { |
| 813 | |
| 814 | int ret; |
| 815 | struct dlfb_data *dev = info->par; |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 816 | /* printk("IMAGE BLIT (1) %d %d %d %d DEPTH %d {%p}!!!\n", image->dx, image->dy, image->width, image->height, image->depth, dev->udev); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 817 | cfb_imageblit(info, image); |
| 818 | ret = |
| 819 | image_blit(dev, image->dx, image->dy, image->width, image->height, |
| 820 | info->screen_base); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 821 | /* printk("IMAGE BLIT (2) %d %d %d %d DEPTH %d {%p} %d!!!\n", image->dx, image->dy, image->width, image->height, image->depth, dev->udev, ret); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 822 | } |
| 823 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 824 | static void dlfb_fillrect(struct fb_info *info, |
| 825 | const struct fb_fillrect *region) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 826 | { |
| 827 | |
| 828 | unsigned char red, green, blue; |
| 829 | struct dlfb_data *dev = info->par; |
| 830 | |
| 831 | memcpy(&red, ®ion->color, 1); |
| 832 | memcpy(&green, ®ion->color + 1, 1); |
| 833 | memcpy(&blue, ®ion->color + 2, 1); |
| 834 | draw_rect(dev, region->dx, region->dy, region->width, region->height, |
| 835 | red, green, blue); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 836 | /* printk("FILL RECT %d %d !!!\n", region->dx, region->dy); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 837 | |
| 838 | } |
| 839 | |
| 840 | static int dlfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) |
| 841 | { |
| 842 | |
| 843 | struct dlfb_data *dev_info = info->par; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 844 | struct dloarea *area = NULL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 845 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 846 | if (cmd == 0xAD) { |
| 847 | char *edid = (char *)arg; |
| 848 | dlfb_edid(dev_info); |
| 849 | if (copy_to_user(edid, dev_info->edid, 128)) { |
| 850 | return -EFAULT; |
| 851 | } |
| 852 | return 0; |
| 853 | } |
| 854 | |
| 855 | if (cmd == 0xAA || cmd == 0xAB || cmd == 0xAC) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 856 | |
| 857 | area = (struct dloarea *)arg; |
| 858 | |
| 859 | if (area->x < 0) |
| 860 | area->x = 0; |
| 861 | |
| 862 | if (area->x > info->var.xres) |
| 863 | area->x = info->var.xres; |
| 864 | |
| 865 | if (area->y < 0) |
| 866 | area->y = 0; |
| 867 | |
| 868 | if (area->y > info->var.yres) |
| 869 | area->y = info->var.yres; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 870 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 871 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 872 | if (cmd == 0xAA) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 873 | image_blit(dev_info, area->x, area->y, area->w, area->h, |
| 874 | info->screen_base); |
| 875 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 876 | if (cmd == 0xAC) { |
| 877 | copyfb(dev_info); |
| 878 | image_blit(dev_info, area->x, area->y, area->w, area->h, |
| 879 | info->screen_base); |
| 880 | swapfb(dev_info); |
| 881 | } else if (cmd == 0xAB) { |
| 882 | |
| 883 | if (area->x2 < 0) |
| 884 | area->x2 = 0; |
| 885 | |
| 886 | if (area->y2 < 0) |
| 887 | area->y2 = 0; |
| 888 | |
| 889 | copyarea(dev_info, |
| 890 | area->x2, area->y2, area->x, area->y, area->w, |
| 891 | area->h); |
| 892 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 893 | return 0; |
| 894 | } |
| 895 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 896 | /* taken from vesafb */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 897 | |
| 898 | static int |
| 899 | dlfb_setcolreg(unsigned regno, unsigned red, unsigned green, |
| 900 | unsigned blue, unsigned transp, struct fb_info *info) |
| 901 | { |
| 902 | int err = 0; |
| 903 | |
| 904 | if (regno >= info->cmap.len) |
| 905 | return 1; |
| 906 | |
| 907 | if (regno < 16) { |
| 908 | if (info->var.red.offset == 10) { |
| 909 | /* 1:5:5:5 */ |
| 910 | ((u32 *) (info->pseudo_palette))[regno] = |
| 911 | ((red & 0xf800) >> 1) | |
| 912 | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); |
| 913 | } else { |
| 914 | /* 0:5:6:5 */ |
| 915 | ((u32 *) (info->pseudo_palette))[regno] = |
| 916 | ((red & 0xf800)) | |
| 917 | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | return err; |
| 922 | } |
| 923 | |
| 924 | static int dlfb_release(struct fb_info *info, int user) |
| 925 | { |
| 926 | struct dlfb_data *dev_info = info->par; |
| 927 | image_blit(dev_info, 0, 0, info->var.xres, info->var.yres, |
| 928 | info->screen_base); |
| 929 | return 0; |
| 930 | } |
| 931 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 932 | static int dlfb_blank(int blank_mode, struct fb_info *info) |
| 933 | { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 934 | struct dlfb_data *dev_info = info->par; |
| 935 | char *bufptr = dev_info->buf; |
| 936 | |
| 937 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); |
| 938 | if (blank_mode != FB_BLANK_UNBLANK) { |
| 939 | bufptr = dlfb_set_register(bufptr, 0x1F, 0x01); |
| 940 | } else { |
| 941 | bufptr = dlfb_set_register(bufptr, 0x1F, 0x00); |
| 942 | } |
| 943 | bufptr = dlfb_set_register(bufptr, 0xFF, 0xFF); |
| 944 | |
| 945 | dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 946 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | static struct fb_ops dlfb_ops = { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 951 | .fb_setcolreg = dlfb_setcolreg, |
| 952 | .fb_fillrect = dlfb_fillrect, |
| 953 | .fb_copyarea = dlfb_copyarea, |
| 954 | .fb_imageblit = dlfb_imageblit, |
| 955 | .fb_mmap = dlfb_mmap, |
| 956 | .fb_ioctl = dlfb_ioctl, |
| 957 | .fb_release = dlfb_release, |
| 958 | .fb_blank = dlfb_blank, |
| 959 | }; |
| 960 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 961 | static int dlfb_probe(struct usb_interface *interface, |
| 962 | const struct usb_device_id *id) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 963 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 964 | struct device *mydev; |
| 965 | struct usb_device *usbdev; |
| 966 | struct dlfb_data *dev; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 967 | struct fb_info *info; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 968 | int videomemorysize; |
| 969 | unsigned char *videomemory; |
| 970 | int retval = -ENOMEM; |
| 971 | struct fb_var_screeninfo *var; |
| 972 | struct fb_bitfield red = { 11, 5, 0 }; |
| 973 | struct fb_bitfield green = { 5, 6, 0 }; |
| 974 | struct fb_bitfield blue = { 0, 5, 0 }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 975 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 976 | usbdev = usb_get_dev(interface_to_usbdev(interface)); |
| 977 | mydev = &usbdev->dev; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 978 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 979 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 980 | if (dev == NULL) { |
| 981 | dev_err(mydev, "failed alloc of dev struct\n"); |
| 982 | goto err_devalloc; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 983 | } |
| 984 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 985 | mutex_init(&dev->bulk_mutex); |
| 986 | dev->udev = usbdev; |
| 987 | dev->interface = interface; |
| 988 | usb_set_intfdata(interface, dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 989 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 990 | dev_info(mydev, "dlfb_probe: setting up DisplayLink device\n"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 991 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 992 | /* |
| 993 | * TODO: replace single 64K buffer with buffer list |
| 994 | * and async dispatch |
| 995 | */ |
| 996 | dev->buf = kmalloc(BUF_SIZE, GFP_KERNEL); |
| 997 | if (dev->buf == NULL) { |
| 998 | dev_err(mydev, "unable to allocate memory for dlfb commands\n"); |
| 999 | goto err_usballoc; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1000 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1001 | dev->bufend = dev->buf + BUF_SIZE; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1002 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1003 | dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1004 | usb_fill_bulk_urb(dev->tx_urb, dev->udev, |
| 1005 | usb_sndbulkpipe(dev->udev, 1), dev->buf, 0, |
| 1006 | dlfb_bulk_callback, dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1007 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1008 | /* allocates framebuffer driver structure, not framebuffer memory */ |
| 1009 | info = framebuffer_alloc(0, mydev); |
| 1010 | if (!info) |
| 1011 | goto err_fballoc; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1012 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1013 | dev->info = info; |
| 1014 | info->par = dev; |
| 1015 | info->pseudo_palette = dev->pseudo_palette; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1016 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1017 | var = &info->var; |
| 1018 | retval = dlfb_get_var_from_edid(dev, var); |
| 1019 | if (retval) { |
| 1020 | /* had a problem getting edid. so fallback to 640x480 */ |
| 1021 | dev_err(mydev, "Problem %d with EDID.\n", retval); |
| 1022 | var->xres = 640; |
| 1023 | var->yres = 480; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1024 | } |
| 1025 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1026 | /* |
| 1027 | * ok, now that we've got the size info, we can alloc our framebuffer. |
| 1028 | * We are using 16bpp. |
| 1029 | */ |
| 1030 | info->var.bits_per_pixel = 16; |
| 1031 | info->fix = dlfb_fix; |
| 1032 | info->fix.line_length = var->xres * (var->bits_per_pixel / 8); |
| 1033 | videomemorysize = info->fix.line_length * var->yres; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1034 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1035 | /* |
| 1036 | * The big chunk of system memory we use as a virtual framebuffer. |
| 1037 | * Pages don't need to be set RESERVED (non-swap) immediately on 2.6 |
| 1038 | * remap_pfn_page() syscall in our mmap and/or defio will handle. |
| 1039 | */ |
| 1040 | videomemory = vmalloc(videomemorysize); |
| 1041 | if (!videomemory) |
| 1042 | goto err_vidmem; |
| 1043 | memset(videomemory, 0, videomemorysize); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1044 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1045 | info->screen_base = videomemory; |
| 1046 | info->fix.smem_len = PAGE_ALIGN(videomemorysize); |
| 1047 | info->fix.smem_start = (unsigned long) videomemory; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1048 | info->flags = |
| 1049 | FBINFO_DEFAULT | FBINFO_READS_FAST | FBINFO_HWACCEL_IMAGEBLIT | |
| 1050 | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1051 | |
| 1052 | /* |
| 1053 | * Second framebuffer copy, mirroring the state of the framebuffer |
| 1054 | * on the physical USB device. We can function without this. |
| 1055 | * But with imperfect damage info we may end up sending pixels over USB |
| 1056 | * that were, in fact, unchanged -- wasting limited USB bandwidth |
| 1057 | */ |
| 1058 | dev->backing_buffer = vmalloc(dev->screen_size); |
| 1059 | if (!dev->backing_buffer) |
| 1060 | dev_info(mydev, "No backing buffer allocated!\n"); |
| 1061 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1062 | info->fbops = &dlfb_ops; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1063 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1064 | var->vmode = FB_VMODE_NONINTERLACED; |
| 1065 | var->red = red; |
| 1066 | var->green = green; |
| 1067 | var->blue = blue; |
| 1068 | |
| 1069 | /* |
| 1070 | * TODO: Enable FB_CONFIG_DEFIO support |
| 1071 | |
| 1072 | info->fbdefio = &dlfb_defio; |
| 1073 | fb_deferred_io_init(info); |
| 1074 | |
| 1075 | */ |
| 1076 | |
| 1077 | retval = fb_alloc_cmap(&info->cmap, 256, 0); |
| 1078 | if (retval < 0) { |
| 1079 | dev_err(mydev, "Failed to allocate colormap\n"); |
| 1080 | goto err_cmap; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1081 | } |
| 1082 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1083 | dlfb_select_std_channel(dev); |
| 1084 | dlfb_set_video_mode(dev, var); |
| 1085 | /* TODO: dlfb_dpy_update(dev); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1086 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1087 | retval = register_framebuffer(info); |
| 1088 | if (retval < 0) |
| 1089 | goto err_regfb; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1090 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1091 | /* paint "successful" green screen */ |
| 1092 | draw_rect(dev, 0, 0, dev->info->var.xres, |
| 1093 | dev->info->var.yres, 0x30, 0xff, 0x30); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 1094 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1095 | dev_info(mydev, "DisplayLink USB device %d now attached, " |
| 1096 | "using %dK of memory\n", info->node, |
| 1097 | ((dev->backing_buffer) ? |
| 1098 | videomemorysize * 2 : videomemorysize) >> 10); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1099 | return 0; |
| 1100 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1101 | err_regfb: |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1102 | fb_dealloc_cmap(&info->cmap); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1103 | err_cmap: |
| 1104 | /* TODO: fb_deferred_io_cleanup(info); */ |
| 1105 | vfree(videomemory); |
| 1106 | err_vidmem: |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1107 | framebuffer_release(info); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1108 | err_fballoc: |
| 1109 | kfree(dev->buf); |
| 1110 | err_usballoc: |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1111 | usb_set_intfdata(interface, NULL); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1112 | usb_put_dev(dev->udev); |
| 1113 | kfree(dev); |
| 1114 | err_devalloc: |
| 1115 | return retval; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1116 | } |
| 1117 | |
| 1118 | static void dlfb_disconnect(struct usb_interface *interface) |
| 1119 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1120 | struct dlfb_data *dev; |
| 1121 | struct fb_info *info; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1122 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1123 | dev = usb_get_intfdata(interface); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1124 | usb_set_intfdata(interface, NULL); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1125 | usb_put_dev(dev->udev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1126 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1127 | /* |
| 1128 | * TODO: since, upon usb disconnect(), usb will cancel in-flight urbs |
| 1129 | * and error out any new ones, look at eliminating need for mutex |
| 1130 | */ |
| 1131 | mutex_lock(&dev->bulk_mutex); |
| 1132 | dev->interface = NULL; |
| 1133 | info = dev->info; |
| 1134 | mutex_unlock(&dev->bulk_mutex); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1135 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1136 | if (info) { |
| 1137 | dev_info(&interface->dev, "Detaching DisplayLink device %d.\n", |
| 1138 | info->node); |
| 1139 | unregister_framebuffer(info); |
| 1140 | fb_dealloc_cmap(&info->cmap); |
| 1141 | /* TODO: fb_deferred_io_cleanup(info); */ |
| 1142 | fb_dealloc_cmap(&info->cmap); |
| 1143 | vfree((void __force *)info->screen_base); |
| 1144 | framebuffer_release(info); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1145 | } |
| 1146 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1147 | if (dev->backing_buffer) |
| 1148 | vfree(dev->backing_buffer); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1149 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1150 | kfree(dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | static struct usb_driver dlfb_driver = { |
| 1154 | .name = "udlfb", |
| 1155 | .probe = dlfb_probe, |
| 1156 | .disconnect = dlfb_disconnect, |
| 1157 | .id_table = id_table, |
| 1158 | }; |
| 1159 | |
| 1160 | static int __init dlfb_init(void) |
| 1161 | { |
| 1162 | int res; |
| 1163 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1164 | res = usb_register(&dlfb_driver); |
| 1165 | if (res) |
| 1166 | err("usb_register failed. Error number %d", res); |
| 1167 | |
| 1168 | printk("VMODES initialized\n"); |
| 1169 | |
| 1170 | return res; |
| 1171 | } |
| 1172 | |
| 1173 | static void __exit dlfb_exit(void) |
| 1174 | { |
| 1175 | usb_deregister(&dlfb_driver); |
| 1176 | } |
| 1177 | |
| 1178 | module_init(dlfb_init); |
| 1179 | module_exit(dlfb_exit); |
| 1180 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame^] | 1181 | MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>, " |
| 1182 | "Jaya Kumar <jayakumar.lkml@gmail.com>"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1183 | MODULE_DESCRIPTION(DRIVER_VERSION); |
| 1184 | MODULE_LICENSE("GPL"); |