drivers/media/video/meye.c

   1 /*
   2  * Motion Eye video4linux driver for Sony Vaio PictureBook
   3  *
   4  * Copyright (C) 2001-2004 Stelian Pop <stelian@popies.net>
   5  *
   6  * Copyright (C) 2001-2002 Alcôve <www.alcove.com>
   7  *
   8  * Copyright (C) 2000 Andrew Tridgell <tridge@valinux.com>
   9  *
  10  * Earlier work by Werner Almesberger, Paul `Rusty' Russell and Paul Mackerras.
  11  *
  12  * Some parts borrowed from various video4linux drivers, especially
  13  * bttv-driver.c and zoran.c, see original files for credits.
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29 #include <linux/config.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/sched.h>
  33 #include <linux/init.h>
  34 #include <linux/videodev.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/io.h>
  37 #include <linux/delay.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/vmalloc.h>
  40 #include <linux/dma-mapping.h>
  41
  42 #include "meye.h"
  43 #include <linux/meye.h>
  44
  45 MODULE_AUTHOR("Stelian Pop <stelian@popies.net>");
  46 MODULE_DESCRIPTION("v4l/v4l2 driver for the MotionEye camera");
  47 MODULE_LICENSE("GPL");
  48 MODULE_VERSION(MEYE_DRIVER_VERSION);
  49
  50 /* force usage of V4L1 API */
  51 static int forcev4l1; /* = 0 */
  52 module_param(forcev4l1, int, 0644);
  53 MODULE_PARM_DESC(forcev4l1, "force use of V4L1 instead of V4L2");
  54
  55 /* number of grab buffers */
  56 static unsigned int gbuffers = 2;
  57 module_param(gbuffers, int, 0444);
  58 MODULE_PARM_DESC(gbuffers, "number of capture buffers, default is 2 (32 max)");
  59
  60 /* size of a grab buffer */
  61 static unsigned int gbufsize = MEYE_MAX_BUFSIZE;
  62 module_param(gbufsize, int, 0444);
  63 MODULE_PARM_DESC(gbufsize, "size of the capture buffers, default is 614400"
  64                  " (will be rounded up to a page multiple)");
  65
  66 /* /dev/videoX registration number */
  67 static int video_nr = -1;
  68 module_param(video_nr, int, 0444);
  69 MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");
  70
  71 /* driver structure - only one possible */
  72 static struct meye meye;
  73
  74 /****************************************************************************/
  75 /* Memory allocation routines (stolen from bttv-driver.c)                   */
  76 /****************************************************************************/
  77 static void *rvmalloc(unsigned long size)
  78 {
  79         void *mem;
  80         unsigned long adr;
  81
  82         size = PAGE_ALIGN(size);
  83         mem = vmalloc_32(size);
  84         if (mem) {
  85                 memset(mem, 0, size);
  86                 adr = (unsigned long) mem;
  87                 while (size > 0) {
  88                         SetPageReserved(vmalloc_to_page((void *)adr));
  89                         adr += PAGE_SIZE;
  90                         size -= PAGE_SIZE;
  91                 }
  92         }
  93         return mem;
  94 }
  95
  96 static void rvfree(void * mem, unsigned long size)
  97 {
  98         unsigned long adr;
  99
 100         if (mem) {
 101                 adr = (unsigned long) mem;
 102                 while ((long) size > 0) {
 103                         ClearPageReserved(vmalloc_to_page((void *)adr));
 104                         adr += PAGE_SIZE;
 105                         size -= PAGE_SIZE;
 106                 }
 107                 vfree(mem);
 108         }
 109 }
 110
 111 /*
 112  * return a page table pointing to N pages of locked memory
 113  *
 114  * NOTE: The meye device expects DMA addresses on 32 bits, we build
 115  * a table of 1024 entries = 4 bytes * 1024 = 4096 bytes.
 116  */
 117 static int ptable_alloc(void)
 118 {
 119         u32 *pt;
 120         int i;
 121
 122         memset(meye.mchip_ptable, 0, sizeof(meye.mchip_ptable));
 123
 124         /* give only 32 bit DMA addresses */
 125         if (dma_set_mask(&meye.mchip_dev->dev, DMA_32BIT_MASK))
 126                 return -1;
 127
 128         meye.mchip_ptable_toc = dma_alloc_coherent(&meye.mchip_dev->dev,
 129                                                    PAGE_SIZE,
 130                                                    &meye.mchip_dmahandle,
 131                                                    GFP_KERNEL);
 132         if (!meye.mchip_ptable_toc) {
 133                 meye.mchip_dmahandle = 0;
 134                 return -1;
 135         }
 136
 137         pt = meye.mchip_ptable_toc;
 138         for (i = 0; i < MCHIP_NB_PAGES; i++) {
 139                 dma_addr_t dma;
 140                 meye.mchip_ptable[i] = dma_alloc_coherent(&meye.mchip_dev->dev,
 141                                                           PAGE_SIZE,
 142                                                           &dma,
 143                                                           GFP_KERNEL);
 144                 if (!meye.mchip_ptable[i]) {
 145                         int j;
 146                         pt = meye.mchip_ptable_toc;
 147                         for (j = 0; j < i; ++j) {
 148                                 dma = (dma_addr_t) *pt;
 149                                 dma_free_coherent(&meye.mchip_dev->dev,
 150                                                   PAGE_SIZE,
 151                                                   meye.mchip_ptable[j], dma);
 152                                 pt++;
 153                         }
 154                         dma_free_coherent(&meye.mchip_dev->dev,
 155                                           PAGE_SIZE,
 156                                           meye.mchip_ptable_toc,
 157                                           meye.mchip_dmahandle);
 158                         meye.mchip_ptable_toc = NULL;
 159                         meye.mchip_dmahandle = 0;
 160                         return -1;
 161                 }
 162                 *pt = (u32) dma;
 163                 pt++;
 164         }
 165         return 0;
 166 }
 167
 168 static void ptable_free(void)
 169 {
 170         u32 *pt;
 171         int i;
 172
 173         pt = meye.mchip_ptable_toc;
 174         for (i = 0; i < MCHIP_NB_PAGES; i++) {
 175                 dma_addr_t dma = (dma_addr_t) *pt;
 176                 if (meye.mchip_ptable[i])
 177                         dma_free_coherent(&meye.mchip_dev->dev,
 178                                           PAGE_SIZE,
 179                                           meye.mchip_ptable[i], dma);
 180                 pt++;
 181         }
 182
 183         if (meye.mchip_ptable_toc)
 184                 dma_free_coherent(&meye.mchip_dev->dev,
 185                                   PAGE_SIZE,
 186                                   meye.mchip_ptable_toc,
 187                                   meye.mchip_dmahandle);
 188
 189         memset(meye.mchip_ptable, 0, sizeof(meye.mchip_ptable));
 190         meye.mchip_ptable_toc = NULL;
 191         meye.mchip_dmahandle = 0;
 192 }
 193
 194 /* copy data from ptable into buf */
 195 static void ptable_copy(u8 *buf, int start, int size, int pt_pages)
 196 {
 197         int i;
 198
 199         for (i = 0; i < (size / PAGE_SIZE) * PAGE_SIZE; i += PAGE_SIZE) {
 200                 memcpy(buf + i, meye.mchip_ptable[start++], PAGE_SIZE);
 201                 if (start >= pt_pages)
 202                         start = 0;
 203         }
 204         memcpy(buf + i, meye.mchip_ptable[start], size % PAGE_SIZE);
 205 }
 206
 207 /****************************************************************************/
 208 /* JPEG tables at different qualities to load into the VRJ chip             */
 209 /****************************************************************************/
 210
 211 /* return a set of quantisation tables based on a quality from 1 to 10 */
 212 static u16 *jpeg_quantisation_tables(int *length, int quality)
 213 {
 214         static u16 jpeg_tables[][70] = { {
 215                 0xdbff, 0x4300, 0xff00, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 216                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 217                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 218                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 219                 0xffff, 0xffff, 0xffff,
 220                 0xdbff, 0x4300, 0xff01, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 221                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 222                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 223                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 224                 0xffff, 0xffff, 0xffff,
 225         },
 226         {
 227                 0xdbff, 0x4300, 0x5000, 0x3c37, 0x3c46, 0x5032, 0x4146, 0x5a46,
 228                 0x5055, 0x785f, 0x82c8, 0x6e78, 0x786e, 0xaff5, 0x91b9, 0xffc8,
 229                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 230                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 231                 0xffff, 0xffff, 0xffff,
 232                 0xdbff, 0x4300, 0x5501, 0x5a5a, 0x6978, 0xeb78, 0x8282, 0xffeb,
 233                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 234                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 235                 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
 236                 0xffff, 0xffff, 0xffff,
 237         },
 238         {
 239                 0xdbff, 0x4300, 0x2800, 0x1e1c, 0x1e23, 0x2819, 0x2123, 0x2d23,
 240                 0x282b, 0x3c30, 0x4164, 0x373c, 0x3c37, 0x587b, 0x495d, 0x9164,
 241                 0x9980, 0x8f96, 0x8c80, 0xa08a, 0xe6b4, 0xa0c3, 0xdaaa, 0x8aad,
 242                 0xc88c, 0xcbff, 0xeeda, 0xfff5, 0xffff, 0xc19b, 0xffff, 0xfaff,
 243                 0xe6ff, 0xfffd, 0xfff8,
 244                 0xdbff, 0x4300, 0x2b01, 0x2d2d, 0x353c, 0x763c, 0x4141, 0xf876,
 245                 0x8ca5, 0xf8a5, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
 246                 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
 247                 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
 248                 0xf8f8, 0xf8f8, 0xfff8,
 249         },
 250         {
 251                 0xdbff, 0x4300, 0x1b00, 0x1412, 0x1417, 0x1b11, 0x1617, 0x1e17,
 252                 0x1b1c, 0x2820, 0x2b42, 0x2528, 0x2825, 0x3a51, 0x303d, 0x6042,
 253                 0x6555, 0x5f64, 0x5d55, 0x6a5b, 0x9978, 0x6a81, 0x9071, 0x5b73,
 254                 0x855d, 0x86b5, 0x9e90, 0xaba3, 0xabad, 0x8067, 0xc9bc, 0xa6ba,
 255                 0x99c7, 0xaba8, 0xffa4,
 256                 0xdbff, 0x4300, 0x1c01, 0x1e1e, 0x2328, 0x4e28, 0x2b2b, 0xa44e,
 257                 0x5d6e, 0xa46e, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
 258                 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
 259                 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
 260                 0xa4a4, 0xa4a4, 0xffa4,
 261         },
 262         {
 263                 0xdbff, 0x4300, 0x1400, 0x0f0e, 0x0f12, 0x140d, 0x1012, 0x1712,
 264                 0x1415, 0x1e18, 0x2132, 0x1c1e, 0x1e1c, 0x2c3d, 0x242e, 0x4932,
 265                 0x4c40, 0x474b, 0x4640, 0x5045, 0x735a, 0x5062, 0x6d55, 0x4556,
 266                 0x6446, 0x6588, 0x776d, 0x817b, 0x8182, 0x604e, 0x978d, 0x7d8c,
 267                 0x7396, 0x817e, 0xff7c,
 268                 0xdbff, 0x4300, 0x1501, 0x1717, 0x1a1e, 0x3b1e, 0x2121, 0x7c3b,
 269                 0x4653, 0x7c53, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
 270                 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
 271                 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
 272                 0x7c7c, 0x7c7c, 0xff7c,
 273         },
 274         {
 275                 0xdbff, 0x4300, 0x1000, 0x0c0b, 0x0c0e, 0x100a, 0x0d0e, 0x120e,
 276                 0x1011, 0x1813, 0x1a28, 0x1618, 0x1816, 0x2331, 0x1d25, 0x3a28,
 277                 0x3d33, 0x393c, 0x3833, 0x4037, 0x5c48, 0x404e, 0x5744, 0x3745,
 278                 0x5038, 0x516d, 0x5f57, 0x6762, 0x6768, 0x4d3e, 0x7971, 0x6470,
 279                 0x5c78, 0x6765, 0xff63,
 280                 0xdbff, 0x4300, 0x1101, 0x1212, 0x1518, 0x2f18, 0x1a1a, 0x632f,
 281                 0x3842, 0x6342, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
 282                 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
 283                 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
 284                 0x6363, 0x6363, 0xff63,
 285         },
 286         {
 287                 0xdbff, 0x4300, 0x0d00, 0x0a09, 0x0a0b, 0x0d08, 0x0a0b, 0x0e0b,
 288                 0x0d0e, 0x130f, 0x1520, 0x1213, 0x1312, 0x1c27, 0x171e, 0x2e20,
 289                 0x3129, 0x2e30, 0x2d29, 0x332c, 0x4a3a, 0x333e, 0x4636, 0x2c37,
 290                 0x402d, 0x4157, 0x4c46, 0x524e, 0x5253, 0x3e32, 0x615a, 0x505a,
 291                 0x4a60, 0x5251, 0xff4f,
 292                 0xdbff, 0x4300, 0x0e01, 0x0e0e, 0x1113, 0x2613, 0x1515, 0x4f26,
 293                 0x2d35, 0x4f35, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
 294                 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
 295                 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
 296                 0x4f4f, 0x4f4f, 0xff4f,
 297         },
 298         {
 299                 0xdbff, 0x4300, 0x0a00, 0x0707, 0x0708, 0x0a06, 0x0808, 0x0b08,
 300                 0x0a0a, 0x0e0b, 0x1018, 0x0d0e, 0x0e0d, 0x151d, 0x1116, 0x2318,
 301                 0x251f, 0x2224, 0x221f, 0x2621, 0x372b, 0x262f, 0x3429, 0x2129,
 302                 0x3022, 0x3141, 0x3934, 0x3e3b, 0x3e3e, 0x2e25, 0x4944, 0x3c43,
 303                 0x3748, 0x3e3d, 0xff3b,
 304                 0xdbff, 0x4300, 0x0a01, 0x0b0b, 0x0d0e, 0x1c0e, 0x1010, 0x3b1c,
 305                 0x2228, 0x3b28, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
 306                 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
 307                 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
 308                 0x3b3b, 0x3b3b, 0xff3b,
 309         },
 310         {
 311                 0xdbff, 0x4300, 0x0600, 0x0504, 0x0506, 0x0604, 0x0506, 0x0706,
 312                 0x0607, 0x0a08, 0x0a10, 0x090a, 0x0a09, 0x0e14, 0x0c0f, 0x1710,
 313                 0x1814, 0x1718, 0x1614, 0x1a16, 0x251d, 0x1a1f, 0x231b, 0x161c,
 314                 0x2016, 0x202c, 0x2623, 0x2927, 0x292a, 0x1f19, 0x302d, 0x282d,
 315                 0x2530, 0x2928, 0xff28,
 316                 0xdbff, 0x4300, 0x0701, 0x0707, 0x080a, 0x130a, 0x0a0a, 0x2813,
 317                 0x161a, 0x281a, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
 318                 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
 319                 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
 320                 0x2828, 0x2828, 0xff28,
 321         },
 322         {
 323                 0xdbff, 0x4300, 0x0300, 0x0202, 0x0203, 0x0302, 0x0303, 0x0403,
 324                 0x0303, 0x0504, 0x0508, 0x0405, 0x0504, 0x070a, 0x0607, 0x0c08,
 325                 0x0c0a, 0x0b0c, 0x0b0a, 0x0d0b, 0x120e, 0x0d10, 0x110e, 0x0b0e,
 326                 0x100b, 0x1016, 0x1311, 0x1514, 0x1515, 0x0f0c, 0x1817, 0x1416,
 327                 0x1218, 0x1514, 0xff14,
 328                 0xdbff, 0x4300, 0x0301, 0x0404, 0x0405, 0x0905, 0x0505, 0x1409,
 329                 0x0b0d, 0x140d, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
 330                 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
 331                 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
 332                 0x1414, 0x1414, 0xff14,
 333         },
 334         {
 335                 0xdbff, 0x4300, 0x0100, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 336                 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 337                 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 338                 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 339                 0x0101, 0x0101, 0xff01,
 340                 0xdbff, 0x4300, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 341                 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 342                 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 343                 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
 344                 0x0101, 0x0101, 0xff01,
 345         } };
 346
 347         if (quality < 0 || quality > 10) {
 348                 printk(KERN_WARNING
 349                        "meye: invalid quality level %d - using 8\n", quality);
 350                 quality = 8;
 351         }
 352
 353         *length = ARRAY_SIZE(jpeg_tables[quality]);
 354         return jpeg_tables[quality];
 355 }
 356
 357 /* return a generic set of huffman tables */
 358 static u16 *jpeg_huffman_tables(int *length)
 359 {
 360         static u16 tables[] = {
 361                 0xC4FF, 0xB500, 0x0010, 0x0102, 0x0303, 0x0402, 0x0503, 0x0405,
 362                 0x0004, 0x0100, 0x017D, 0x0302, 0x0400, 0x0511, 0x2112, 0x4131,
 363                 0x1306, 0x6151, 0x2207, 0x1471, 0x8132, 0xA191, 0x2308, 0xB142,
 364                 0x15C1, 0xD152, 0x24F0, 0x6233, 0x8272, 0x0A09, 0x1716, 0x1918,
 365                 0x251A, 0x2726, 0x2928, 0x342A, 0x3635, 0x3837, 0x3A39, 0x4443,
 366                 0x4645, 0x4847, 0x4A49, 0x5453, 0x5655, 0x5857, 0x5A59, 0x6463,
 367                 0x6665, 0x6867, 0x6A69, 0x7473, 0x7675, 0x7877, 0x7A79, 0x8483,
 368                 0x8685, 0x8887, 0x8A89, 0x9392, 0x9594, 0x9796, 0x9998, 0xA29A,
 369                 0xA4A3, 0xA6A5, 0xA8A7, 0xAAA9, 0xB3B2, 0xB5B4, 0xB7B6, 0xB9B8,
 370                 0xC2BA, 0xC4C3, 0xC6C5, 0xC8C7, 0xCAC9, 0xD3D2, 0xD5D4, 0xD7D6,
 371                 0xD9D8, 0xE1DA, 0xE3E2, 0xE5E4, 0xE7E6, 0xE9E8, 0xF1EA, 0xF3F2,
 372                 0xF5F4, 0xF7F6, 0xF9F8, 0xFFFA,
 373                 0xC4FF, 0xB500, 0x0011, 0x0102, 0x0402, 0x0304, 0x0704, 0x0405,
 374                 0x0004, 0x0201, 0x0077, 0x0201, 0x1103, 0x0504, 0x3121, 0x1206,
 375                 0x5141, 0x6107, 0x1371, 0x3222, 0x0881, 0x4214, 0xA191, 0xC1B1,
 376                 0x2309, 0x5233, 0x15F0, 0x7262, 0x0AD1, 0x2416, 0xE134, 0xF125,
 377                 0x1817, 0x1A19, 0x2726, 0x2928, 0x352A, 0x3736, 0x3938, 0x433A,
 378                 0x4544, 0x4746, 0x4948, 0x534A, 0x5554, 0x5756, 0x5958, 0x635A,
 379                 0x6564, 0x6766, 0x6968, 0x736A, 0x7574, 0x7776, 0x7978, 0x827A,
 380                 0x8483, 0x8685, 0x8887, 0x8A89, 0x9392, 0x9594, 0x9796, 0x9998,
 381                 0xA29A, 0xA4A3, 0xA6A5, 0xA8A7, 0xAAA9, 0xB3B2, 0xB5B4, 0xB7B6,
 382                 0xB9B8, 0xC2BA, 0xC4C3, 0xC6C5, 0xC8C7, 0xCAC9, 0xD3D2, 0xD5D4,
 383                 0xD7D6, 0xD9D8, 0xE2DA, 0xE4E3, 0xE6E5, 0xE8E7, 0xEAE9, 0xF3F2,
 384                 0xF5F4, 0xF7F6, 0xF9F8, 0xFFFA,
 385                 0xC4FF, 0x1F00, 0x0000, 0x0501, 0x0101, 0x0101, 0x0101, 0x0000,
 386                 0x0000, 0x0000, 0x0000, 0x0201, 0x0403, 0x0605, 0x0807, 0x0A09,
 387                 0xFF0B,
 388                 0xC4FF, 0x1F00, 0x0001, 0x0103, 0x0101, 0x0101, 0x0101, 0x0101,
 389                 0x0000, 0x0000, 0x0000, 0x0201, 0x0403, 0x0605, 0x0807, 0x0A09,
 390                 0xFF0B
 391         };
 392
 393         *length = ARRAY_SIZE(tables);
 394         return tables;
 395 }
 396
 397 /****************************************************************************/
 398 /* MCHIP low-level functions                                                */
 399 /****************************************************************************/
 400
 401 /* returns the horizontal capture size */
 402 static inline int mchip_hsize(void)
 403 {
 404         return meye.params.subsample ? 320 : 640;
 405 }
 406
 407 /* returns the vertical capture size */
 408 static inline int mchip_vsize(void)
 409 {
 410         return meye.params.subsample ? 240 : 480;
 411 }
 412
 413 /* waits for a register to be available */
 414 static void mchip_sync(int reg)
 415 {
 416         u32 status;
 417         int i;
 418
 419         if (reg == MCHIP_MM_FIFO_DATA) {
 420                 for (i = 0; i < MCHIP_REG_TIMEOUT; i++) {
 421                         status = readl(meye.mchip_mmregs +
 422                                        MCHIP_MM_FIFO_STATUS);
 423                         if (!(status & MCHIP_MM_FIFO_WAIT)) {
 424                                 printk(KERN_WARNING "meye: fifo not ready\n");
 425                                 return;
 426                         }
 427                         if (status & MCHIP_MM_FIFO_READY)
 428                                 return;
 429                         udelay(1);
 430                 }
 431         } else if (reg > 0x80) {
 432                 u32 mask = (reg < 0x100) ? MCHIP_HIC_STATUS_MCC_RDY
 433                                          : MCHIP_HIC_STATUS_VRJ_RDY;
 434                 for (i = 0; i < MCHIP_REG_TIMEOUT; i++) {
 435                         status = readl(meye.mchip_mmregs + MCHIP_HIC_STATUS);
 436                         if (status & mask)
 437                                 return;
 438                         udelay(1);
 439                 }
 440         } else
 441                 return;
 442         printk(KERN_WARNING
 443                "meye: mchip_sync() timeout on reg 0x%x status=0x%x\n",
 444                reg, status);
 445 }
 446
 447 /* sets a value into the register */
 448 static inline void mchip_set(int reg, u32 v)
 449 {
 450         mchip_sync(reg);
 451         writel(v, meye.mchip_mmregs + reg);
 452 }
 453
 454 /* get the register value */
 455 static inline u32 mchip_read(int reg)
 456 {
 457         mchip_sync(reg);
 458         return readl(meye.mchip_mmregs + reg);
 459 }
 460
 461 /* wait for a register to become a particular value */
 462 static inline int mchip_delay(u32 reg, u32 v)
 463 {
 464         int n = 10;
 465         while (--n && mchip_read(reg) != v)
 466                 udelay(1);
 467         return n;
 468 }
 469
 470 /* setup subsampling */
 471 static void mchip_subsample(void)
 472 {
 473         mchip_set(MCHIP_MCC_R_SAMPLING, meye.params.subsample);
 474         mchip_set(MCHIP_MCC_R_XRANGE, mchip_hsize());
 475         mchip_set(MCHIP_MCC_R_YRANGE, mchip_vsize());
 476         mchip_set(MCHIP_MCC_B_XRANGE, mchip_hsize());
 477         mchip_set(MCHIP_MCC_B_YRANGE, mchip_vsize());
 478         mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);
 479 }
 480
 481 /* set the framerate into the mchip */
 482 static void mchip_set_framerate(void)
 483 {
 484         mchip_set(MCHIP_HIC_S_RATE, meye.params.framerate);
 485 }
 486
 487 /* load some huffman and quantisation tables into the VRJ chip ready
 488    for JPEG compression */
 489 static void mchip_load_tables(void)
 490 {
 491         int i;
 492         int length;
 493         u16 *tables;
 494
 495         tables = jpeg_huffman_tables(&length);
 496         for (i = 0; i < length; i++)
 497                 writel(tables[i], meye.mchip_mmregs + MCHIP_VRJ_TABLE_DATA);
 498
 499         tables = jpeg_quantisation_tables(&length, meye.params.quality);
 500         for (i = 0; i < length; i++)
 501                 writel(tables[i], meye.mchip_mmregs + MCHIP_VRJ_TABLE_DATA);
 502 }
 503
 504 /* setup the VRJ parameters in the chip */
 505 static void mchip_vrj_setup(u8 mode)
 506 {
 507         mchip_set(MCHIP_VRJ_BUS_MODE, 5);
 508         mchip_set(MCHIP_VRJ_SIGNAL_ACTIVE_LEVEL, 0x1f);
 509         mchip_set(MCHIP_VRJ_PDAT_USE, 1);
 510         mchip_set(MCHIP_VRJ_IRQ_FLAG, 0xa0);
 511         mchip_set(MCHIP_VRJ_MODE_SPECIFY, mode);
 512         mchip_set(MCHIP_VRJ_NUM_LINES, mchip_vsize());
 513         mchip_set(MCHIP_VRJ_NUM_PIXELS, mchip_hsize());
 514         mchip_set(MCHIP_VRJ_NUM_COMPONENTS, 0x1b);
 515         mchip_set(MCHIP_VRJ_LIMIT_COMPRESSED_LO, 0xFFFF);
 516         mchip_set(MCHIP_VRJ_LIMIT_COMPRESSED_HI, 0xFFFF);
 517         mchip_set(MCHIP_VRJ_COMP_DATA_FORMAT, 0xC);
 518         mchip_set(MCHIP_VRJ_RESTART_INTERVAL, 0);
 519         mchip_set(MCHIP_VRJ_SOF1, 0x601);
 520         mchip_set(MCHIP_VRJ_SOF2, 0x1502);
 521         mchip_set(MCHIP_VRJ_SOF3, 0x1503);
 522         mchip_set(MCHIP_VRJ_SOF4, 0x1596);
 523         mchip_set(MCHIP_VRJ_SOS, 0x0ed0);
 524
 525         mchip_load_tables();
 526 }
 527
 528 /* sets the DMA parameters into the chip */
 529 static void mchip_dma_setup(dma_addr_t dma_addr)
 530 {
 531         int i;
 532
 533         mchip_set(MCHIP_MM_PT_ADDR, (u32)dma_addr);
 534         for (i = 0; i < 4; i++)
 535                 mchip_set(MCHIP_MM_FIR(i), 0);
 536         meye.mchip_fnum = 0;
 537 }
 538
 539 /* setup for DMA transfers - also zeros the framebuffer */
 540 static int mchip_dma_alloc(void)
 541 {
 542         if (!meye.mchip_dmahandle)
 543                 if (ptable_alloc())
 544                         return -1;
 545         return 0;
 546 }
 547
 548 /* frees the DMA buffer */
 549 static void mchip_dma_free(void)
 550 {
 551         if (meye.mchip_dmahandle) {
 552                 mchip_dma_setup(0);
 553                 ptable_free();
 554         }
 555 }
 556
 557 /* stop any existing HIC action and wait for any dma to complete then
 558    reset the dma engine */
 559 static void mchip_hic_stop(void)
 560 {
 561         int i, j;
 562
 563         meye.mchip_mode = MCHIP_HIC_MODE_NOOP;
 564         if (!(mchip_read(MCHIP_HIC_STATUS) & MCHIP_HIC_STATUS_BUSY))
 565                 return;
 566         for (i = 0; i < 20; ++i) {
 567                 mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_STOP);
 568                 mchip_delay(MCHIP_HIC_CMD, 0);
 569                 for (j = 0; j < 100; ++j) {
 570                         if (mchip_delay(MCHIP_HIC_STATUS,
 571                                         MCHIP_HIC_STATUS_IDLE))
 572                                 return;
 573                         msleep(1);
 574                 }
 575                 printk(KERN_ERR "meye: need to reset HIC!\n");
 576
 577                 mchip_set(MCHIP_HIC_CTL, MCHIP_HIC_CTL_SOFT_RESET);
 578                 msleep(250);
 579         }
 580         printk(KERN_ERR "meye: resetting HIC hanged!\n");
 581 }
 582
 583 /****************************************************************************/
 584 /* MCHIP frame processing functions                                         */
 585 /****************************************************************************/
 586
 587 /* get the next ready frame from the dma engine */
 588 static u32 mchip_get_frame(void)
 589 {
 590         u32 v;
 591
 592         v = mchip_read(MCHIP_MM_FIR(meye.mchip_fnum));
 593         return v;
 594 }
 595
 596 /* frees the current frame from the dma engine */
 597 static void mchip_free_frame(void)
 598 {
 599         mchip_set(MCHIP_MM_FIR(meye.mchip_fnum), 0);
 600         meye.mchip_fnum++;
 601         meye.mchip_fnum %= 4;
 602 }
 603
 604 /* read one frame from the framebuffer assuming it was captured using
 605    a uncompressed transfer */
 606 static void mchip_cont_read_frame(u32 v, u8 *buf, int size)
 607 {
 608         int pt_id;
 609
 610         pt_id = (v >> 17) & 0x3FF;
 611
 612         ptable_copy(buf, pt_id, size, MCHIP_NB_PAGES);
 613 }
 614
 615 /* read a compressed frame from the framebuffer */
 616 static int mchip_comp_read_frame(u32 v, u8 *buf, int size)
 617 {
 618         int pt_start, pt_end, trailer;
 619         int fsize;
 620         int i;
 621
 622         pt_start = (v >> 19) & 0xFF;
 623         pt_end = (v >> 11) & 0xFF;
 624         trailer = (v >> 1) & 0x3FF;
 625
 626         if (pt_end < pt_start)
 627                 fsize = (MCHIP_NB_PAGES_MJPEG - pt_start) * PAGE_SIZE +
 628                         pt_end * PAGE_SIZE + trailer * 4;
 629         else
 630                 fsize = (pt_end - pt_start) * PAGE_SIZE + trailer * 4;
 631
 632         if (fsize > size) {
 633                 printk(KERN_WARNING "meye: oversized compressed frame %d\n",
 634                        fsize);
 635                 return -1;
 636         }
 637
 638         ptable_copy(buf, pt_start, fsize, MCHIP_NB_PAGES_MJPEG);
 639
 640 #ifdef MEYE_JPEG_CORRECTION
 641
 642         /* Some mchip generated jpeg frames are incorrect. In most
 643          * (all ?) of those cases, the final EOI (0xff 0xd9) marker
 644          * is not present at the end of the frame.
 645          *
 646          * Since adding the final marker is not enough to restore
 647          * the jpeg integrity, we drop the frame.
 648          */
 649
 650         for (i = fsize - 1; i > 0 && buf[i] == 0xff; i--) ;
 651
 652         if (i < 2 || buf[i - 1] != 0xff || buf[i] != 0xd9)
 653                 return -1;
 654
 655 #endif
 656
 657         return fsize;
 658 }
 659
 660 /* take a picture into SDRAM */
 661 static void mchip_take_picture(void)
 662 {
 663         int i;
 664
 665         mchip_hic_stop();
 666         mchip_subsample();
 667         mchip_dma_setup(meye.mchip_dmahandle);
 668
 669         mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_CAP);
 670         mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);
 671
 672         mchip_delay(MCHIP_HIC_CMD, 0);
 673
 674         for (i = 0; i < 100; ++i) {
 675                 if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
 676                         break;
 677                 msleep(1);
 678         }
 679 }
 680
 681 /* dma a previously taken picture into a buffer */
 682 static void mchip_get_picture(u8 *buf, int bufsize)
 683 {
 684         u32 v;
 685         int i;
 686
 687         mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_OUT);
 688         mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);
 689
 690         mchip_delay(MCHIP_HIC_CMD, 0);
 691         for (i = 0; i < 100; ++i) {
 692                 if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
 693                         break;
 694                 msleep(1);
 695         }
 696         for (i = 0; i < 4; ++i) {
 697                 v = mchip_get_frame();
 698                 if (v & MCHIP_MM_FIR_RDY) {
 699                         mchip_cont_read_frame(v, buf, bufsize);
 700                         break;
 701                 }
 702                 mchip_free_frame();
 703         }
 704 }
 705
 706 /* start continuous dma capture */
 707 static void mchip_continuous_start(void)
 708 {
 709         mchip_hic_stop();
 710         mchip_subsample();
 711         mchip_set_framerate();
 712         mchip_dma_setup(meye.mchip_dmahandle);
 713
 714         meye.mchip_mode = MCHIP_HIC_MODE_CONT_OUT;
 715
 716         mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_CONT_OUT);
 717         mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);
 718
 719         mchip_delay(MCHIP_HIC_CMD, 0);
 720 }
 721
 722 /* compress one frame into a buffer */
 723 static int mchip_compress_frame(u8 *buf, int bufsize)
 724 {
 725         u32 v;
 726         int len = -1, i;
 727
 728         mchip_vrj_setup(0x3f);
 729         udelay(50);
 730
 731         mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_COMP);
 732         mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);
 733
 734         mchip_delay(MCHIP_HIC_CMD, 0);
 735         for (i = 0; i < 100; ++i) {
 736                 if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
 737                         break;
 738                 msleep(1);
 739         }
 740
 741         for (i = 0; i < 4; ++i) {
 742                 v = mchip_get_frame();
 743                 if (v & MCHIP_MM_FIR_RDY) {
 744                         len = mchip_comp_read_frame(v, buf, bufsize);
 745                         break;
 746                 }
 747                 mchip_free_frame();
 748         }
 749         return len;
 750 }
 751
 752 #if 0
 753 /* uncompress one image into a buffer */
 754 static int mchip_uncompress_frame(u8 *img, int imgsize, u8 *buf, int bufsize)
 755 {
 756         mchip_vrj_setup(0x3f);
 757         udelay(50);
 758
 759         mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_DECOMP);
 760         mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);
 761
 762         mchip_delay(MCHIP_HIC_CMD, 0);
 763
 764         return mchip_comp_read_frame(buf, bufsize);
 765 }
 766 #endif
 767
 768 /* start continuous compressed capture */
 769 static void mchip_cont_compression_start(void)
 770 {
 771         mchip_hic_stop();
 772         mchip_vrj_setup(0x3f);
 773         mchip_subsample();
 774         mchip_set_framerate();
 775         mchip_dma_setup(meye.mchip_dmahandle);
 776
 777         meye.mchip_mode = MCHIP_HIC_MODE_CONT_COMP;
 778
 779         mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_CONT_COMP);
 780         mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);
 781
 782         mchip_delay(MCHIP_HIC_CMD, 0);
 783 }
 784
 785 /****************************************************************************/
 786 /* Interrupt handling                                                       */
 787 /****************************************************************************/
 788
 789 static irqreturn_t meye_irq(int irq, void *dev_id, struct pt_regs *regs)
 790 {
 791         u32 v;
 792         int reqnr;
 793         static int sequence = 0;
 794
 795         v = mchip_read(MCHIP_MM_INTA);
 796
 797         if (meye.mchip_mode != MCHIP_HIC_MODE_CONT_OUT &&
 798             meye.mchip_mode != MCHIP_HIC_MODE_CONT_COMP)
 799                 return IRQ_NONE;
 800
 801 again:
 802         v = mchip_get_frame();
 803         if (!(v & MCHIP_MM_FIR_RDY))
 804                 return IRQ_HANDLED;
 805
 806         if (meye.mchip_mode == MCHIP_HIC_MODE_CONT_OUT) {
 807                 if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
 808                               sizeof(int)) != sizeof(int)) {
 809                         mchip_free_frame();
 810                         return IRQ_HANDLED;
 811                 }
 812                 mchip_cont_read_frame(v, meye.grab_fbuffer + gbufsize * reqnr,
 813                                       mchip_hsize() * mchip_vsize() * 2);
 814                 meye.grab_buffer[reqnr].size = mchip_hsize() * mchip_vsize() * 2;
 815                 meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
 816                 do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
 817                 meye.grab_buffer[reqnr].sequence = sequence++;
 818                 kfifo_put(meye.doneq, (unsigned char *)&reqnr, sizeof(int));
 819                 wake_up_interruptible(&meye.proc_list);
 820         } else {
 821                 int size;
 822                 size = mchip_comp_read_frame(v, meye.grab_temp, gbufsize);
 823                 if (size == -1) {
 824                         mchip_free_frame();
 825                         goto again;
 826                 }
 827                 if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
 828                               sizeof(int)) != sizeof(int)) {
 829                         mchip_free_frame();
 830                         goto again;
 831                 }
 832                 memcpy(meye.grab_fbuffer + gbufsize * reqnr, meye.grab_temp,
 833                        size);
 834                 meye.grab_buffer[reqnr].size = size;
 835                 meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
 836                 do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
 837                 meye.grab_buffer[reqnr].sequence = sequence++;
 838                 kfifo_put(meye.doneq, (unsigned char *)&reqnr, sizeof(int));
 839                 wake_up_interruptible(&meye.proc_list);
 840         }
 841         mchip_free_frame();
 842         goto again;
 843 }
 844
 845 /****************************************************************************/
 846 /* video4linux integration                                                  */
 847 /****************************************************************************/
 848
 849 static int meye_open(struct inode *inode, struct file *file)
 850 {
 851         int i, err;
 852
 853         err = video_exclusive_open(inode, file);
 854         if (err < 0)
 855                 return err;
 856
 857         mchip_hic_stop();
 858
 859         if (mchip_dma_alloc()) {
 860                 printk(KERN_ERR "meye: mchip framebuffer allocation failed\n");
 861                 video_exclusive_release(inode, file);
 862                 return -ENOBUFS;
 863         }
 864
 865         for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
 866                 meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
 867         kfifo_reset(meye.grabq);
 868         kfifo_reset(meye.doneq);
 869         return 0;
 870 }
 871
 872 static int meye_release(struct inode *inode, struct file *file)
 873 {
 874         mchip_hic_stop();
 875         mchip_dma_free();
 876         video_exclusive_release(inode, file);
 877         return 0;
 878 }
 879
 880 static int meye_do_ioctl(struct inode *inode, struct file *file,
 881                          unsigned int cmd, void *arg)
 882 {
 883         switch (cmd) {
 884
 885         case VIDIOCGCAP: {
 886                 struct video_capability *b = arg;
 887                 strcpy(b->name,meye.video_dev->name);
 888                 b->type = VID_TYPE_CAPTURE;
 889                 b->channels = 1;
 890                 b->audios = 0;
 891                 b->maxwidth = 640;
 892                 b->maxheight = 480;
 893                 b->minwidth = 320;
 894                 b->minheight = 240;
 895                 break;
 896         }
 897
 898         case VIDIOCGCHAN: {
 899                 struct video_channel *v = arg;
 900                 v->flags = 0;
 901                 v->tuners = 0;
 902                 v->type = VIDEO_TYPE_CAMERA;
 903                 if (v->channel != 0)
 904                         return -EINVAL;
 905                 strcpy(v->name,"Camera");
 906                 break;
 907         }
 908
 909         case VIDIOCSCHAN: {
 910                 struct video_channel *v = arg;
 911                 if (v->channel != 0)
 912                         return -EINVAL;
 913                 break;
 914         }
 915
 916         case VIDIOCGPICT: {
 917                 struct video_picture *p = arg;
 918                 *p = meye.picture;
 919                 break;
 920         }
 921
 922         case VIDIOCSPICT: {
 923                 struct video_picture *p = arg;
 924                 if (p->depth != 16)
 925                         return -EINVAL;
 926                 if (p->palette != VIDEO_PALETTE_YUV422)
 927                         return -EINVAL;
 928                 mutex_lock(&meye.lock);
 929                 sonypi_camera_command(SONYPI_COMMAND_SETCAMERABRIGHTNESS,
 930                                       p->brightness >> 10);
 931                 sonypi_camera_command(SONYPI_COMMAND_SETCAMERAHUE,
 932                                       p->hue >> 10);
 933                 sonypi_camera_command(SONYPI_COMMAND_SETCAMERACOLOR,
 934                                       p->colour >> 10);
 935                 sonypi_camera_command(SONYPI_COMMAND_SETCAMERACONTRAST,
 936                                       p->contrast >> 10);
 937                 meye.picture = *p;
 938                 mutex_unlock(&meye.lock);
 939                 break;
 940         }
 941
 942         case VIDIOCSYNC: {
 943                 int *i = arg;
 944                 int unused;
 945
 946                 if (*i < 0 || *i >= gbuffers)
 947                         return -EINVAL;
 948
 949                 mutex_lock(&meye.lock);
 950
 951                 switch (meye.grab_buffer[*i].state) {
 952
 953                 case MEYE_BUF_UNUSED:
 954                         mutex_unlock(&meye.lock);
 955                         return -EINVAL;
 956                 case MEYE_BUF_USING:
 957                         if (file->f_flags & O_NONBLOCK) {
 958                                 mutex_unlock(&meye.lock);
 959                                 return -EAGAIN;
 960                         }
 961                         if (wait_event_interruptible(meye.proc_list,
 962                                                      (meye.grab_buffer[*i].state != MEYE_BUF_USING))) {
 963                                 mutex_unlock(&meye.lock);
 964                                 return -EINTR;
 965                         }
 966                         /* fall through */
 967                 case MEYE_BUF_DONE:
 968                         meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
 969                         kfifo_get(meye.doneq, (unsigned char *)&unused, sizeof(int));
 970                 }
 971                 mutex_unlock(&meye.lock);
 972                 break;
 973         }
 974
 975         case VIDIOCMCAPTURE: {
 976                 struct video_mmap *vm = arg;
 977                 int restart = 0;
 978
 979                 if (vm->frame >= gbuffers || vm->frame < 0)
 980                         return -EINVAL;
 981                 if (vm->format != VIDEO_PALETTE_YUV422)
 982                         return -EINVAL;
 983                 if (vm->height * vm->width * 2 > gbufsize)
 984                         return -EINVAL;
 985                 if (!meye.grab_fbuffer)
 986                         return -EINVAL;
 987                 if (meye.grab_buffer[vm->frame].state != MEYE_BUF_UNUSED)
 988                         return -EBUSY;
 989
 990                 mutex_lock(&meye.lock);
 991                 if (vm->width == 640 && vm->height == 480) {
 992                         if (meye.params.subsample) {
 993                                 meye.params.subsample = 0;
 994                                 restart = 1;
 995                         }
 996                 } else if (vm->width == 320 && vm->height == 240) {
 997                         if (!meye.params.subsample) {
 998                                 meye.params.subsample = 1;
 999                                 restart = 1;
1000                         }
1001                 } else {
1002                         mutex_unlock(&meye.lock);
1003                         return -EINVAL;
1004                 }
1005
1006                 if (restart || meye.mchip_mode != MCHIP_HIC_MODE_CONT_OUT)
1007                         mchip_continuous_start();
1008                 meye.grab_buffer[vm->frame].state = MEYE_BUF_USING;
1009                 kfifo_put(meye.grabq, (unsigned char *)&vm->frame, sizeof(int));
1010                 mutex_unlock(&meye.lock);
1011                 break;
1012         }
1013
1014         case VIDIOCGMBUF: {
1015                 struct video_mbuf *vm = arg;
1016                 int i;
1017
1018                 memset(vm, 0 , sizeof(*vm));
1019                 vm->size = gbufsize * gbuffers;
1020                 vm->frames = gbuffers;
1021                 for (i = 0; i < gbuffers; i++)
1022                         vm->offsets[i] = i * gbufsize;
1023                 break;
1024         }
1025
1026         case MEYEIOC_G_PARAMS: {
1027                 struct meye_params *p = arg;
1028                 *p = meye.params;
1029                 break;
1030         }
1031
1032         case MEYEIOC_S_PARAMS: {
1033                 struct meye_params *jp = arg;
1034                 if (jp->subsample > 1)
1035                         return -EINVAL;
1036                 if (jp->quality > 10)
1037                         return -EINVAL;
1038                 if (jp->sharpness > 63 || jp->agc > 63 || jp->picture > 63)
1039                         return -EINVAL;
1040                 if (jp->framerate > 31)
1041                         return -EINVAL;
1042                 mutex_lock(&meye.lock);
1043                 if (meye.params.subsample != jp->subsample ||
1044                     meye.params.quality != jp->quality)
1045                         mchip_hic_stop();       /* need restart */
1046                 meye.params = *jp;
1047                 sonypi_camera_command(SONYPI_COMMAND_SETCAMERASHARPNESS,
1048                                       meye.params.sharpness);
1049                 sonypi_camera_command(SONYPI_COMMAND_SETCAMERAAGC,
1050                                       meye.params.agc);
1051                 sonypi_camera_command(SONYPI_COMMAND_SETCAMERAPICTURE,
1052                                       meye.params.picture);
1053                 mutex_unlock(&meye.lock);
1054                 break;
1055         }
1056
1057         case MEYEIOC_QBUF_CAPT: {
1058                 int *nb = arg;
1059
1060                 if (!meye.grab_fbuffer)
1061                         return -EINVAL;
1062                 if (*nb >= gbuffers)
1063                         return -EINVAL;
1064                 if (*nb < 0) {
1065                         /* stop capture */
1066                         mchip_hic_stop();
1067                         return 0;
1068                 }
1069                 if (meye.grab_buffer[*nb].state != MEYE_BUF_UNUSED)
1070                         return -EBUSY;
1071                 mutex_lock(&meye.lock);
1072                 if (meye.mchip_mode != MCHIP_HIC_MODE_CONT_COMP)
1073                         mchip_cont_compression_start();
1074                 meye.grab_buffer[*nb].state = MEYE_BUF_USING;
1075                 kfifo_put(meye.grabq, (unsigned char *)nb, sizeof(int));
1076                 mutex_unlock(&meye.lock);
1077                 break;
1078         }
1079
1080         case MEYEIOC_SYNC: {
1081                 int *i = arg;
1082                 int unused;
1083
1084                 if (*i < 0 || *i >= gbuffers)
1085                         return -EINVAL;
1086
1087                 mutex_lock(&meye.lock);
1088                 switch (meye.grab_buffer[*i].state) {
1089
1090                 case MEYE_BUF_UNUSED:
1091                         mutex_unlock(&meye.lock);
1092                         return -EINVAL;
1093                 case MEYE_BUF_USING:
1094                         if (file->f_flags & O_NONBLOCK) {
1095                                 mutex_unlock(&meye.lock);
1096                                 return -EAGAIN;
1097                         }
1098                         if (wait_event_interruptible(meye.proc_list,
1099                                                      (meye.grab_buffer[*i].state != MEYE_BUF_USING))) {
1100                                 mutex_unlock(&meye.lock);
1101                                 return -EINTR;
1102                         }
1103                         /* fall through */
1104                 case MEYE_BUF_DONE:
1105                         meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
1106                         kfifo_get(meye.doneq, (unsigned char *)&unused, sizeof(int));
1107                 }
1108                 *i = meye.grab_buffer[*i].size;
1109                 mutex_unlock(&meye.lock);
1110                 break;
1111         }
1112
1113         case MEYEIOC_STILLCAPT: {
1114
1115                 if (!meye.grab_fbuffer)
1116                         return -EINVAL;
1117                 if (meye.grab_buffer[0].state != MEYE_BUF_UNUSED)
1118                         return -EBUSY;
1119                 mutex_lock(&meye.lock);
1120                 meye.grab_buffer[0].state = MEYE_BUF_USING;
1121                 mchip_take_picture();
1122                 mchip_get_picture(
1123                         meye.grab_fbuffer,
1124                         mchip_hsize() * mchip_vsize() * 2);
1125                 meye.grab_buffer[0].state = MEYE_BUF_DONE;
1126                 mutex_unlock(&meye.lock);
1127                 break;
1128         }
1129
1130         case MEYEIOC_STILLJCAPT: {
1131                 int *len = arg;
1132
1133                 if (!meye.grab_fbuffer)
1134                         return -EINVAL;
1135                 if (meye.grab_buffer[0].state != MEYE_BUF_UNUSED)
1136                         return -EBUSY;
1137                 mutex_lock(&meye.lock);
1138                 meye.grab_buffer[0].state = MEYE_BUF_USING;
1139                 *len = -1;
1140                 while (*len == -1) {
1141                         mchip_take_picture();
1142                         *len = mchip_compress_frame(meye.grab_fbuffer, gbufsize);
1143                 }
1144                 meye.grab_buffer[0].state = MEYE_BUF_DONE;
1145                 mutex_unlock(&meye.lock);
1146                 break;
1147         }
1148
1149         case VIDIOC_QUERYCAP: {
1150                 struct v4l2_capability *cap = arg;
1151
1152                 if (forcev4l1)
1153                         return -EINVAL;
1154
1155                 memset(cap, 0, sizeof(*cap));
1156                 strcpy(cap->driver, "meye");
1157                 strcpy(cap->card, "meye");
1158                 sprintf(cap->bus_info, "PCI:%s", pci_name(meye.mchip_dev));
1159                 cap->version = (MEYE_DRIVER_MAJORVERSION << 8) +
1160                                MEYE_DRIVER_MINORVERSION;
1161                 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
1162                                     V4L2_CAP_STREAMING;
1163                 break;
1164         }
1165
1166         case VIDIOC_ENUMINPUT: {
1167                 struct v4l2_input *i = arg;
1168
1169                 if (i->index != 0)
1170                         return -EINVAL;
1171                 memset(i, 0, sizeof(*i));
1172                 i->index = 0;
1173                 strcpy(i->name, "Camera");
1174                 i->type = V4L2_INPUT_TYPE_CAMERA;
1175                 break;
1176         }
1177
1178         case VIDIOC_G_INPUT: {
1179                 int *i = arg;
1180
1181                 *i = 0;
1182                 break;
1183         }
1184
1185         case VIDIOC_S_INPUT: {
1186                 int *i = arg;
1187
1188                 if (*i != 0)
1189                         return -EINVAL;
1190                 break;
1191         }
1192
1193         case VIDIOC_QUERYCTRL: {
1194                 struct v4l2_queryctrl *c = arg;
1195
1196                 switch (c->id) {
1197
1198                 case V4L2_CID_BRIGHTNESS:
1199                         c->type = V4L2_CTRL_TYPE_INTEGER;
1200                         strcpy(c->name, "Brightness");
1201                         c->minimum = 0;
1202                         c->maximum = 63;
1203                         c->step = 1;
1204                         c->default_value = 32;
1205                         c->flags = 0;
1206                         break;
1207                 case V4L2_CID_HUE:
1208                         c->type = V4L2_CTRL_TYPE_INTEGER;
1209                         strcpy(c->name, "Hue");
1210                         c->minimum = 0;
1211                         c->maximum = 63;
1212                         c->step = 1;
1213                         c->default_value = 32;
1214                         c->flags = 0;
1215                         break;
1216                 case V4L2_CID_CONTRAST:
1217                         c->type = V4L2_CTRL_TYPE_INTEGER;
1218                         strcpy(c->name, "Contrast");
1219                         c->minimum = 0;
1220                         c->maximum = 63;
1221                         c->step = 1;
1222                         c->default_value = 32;
1223                         c->flags = 0;
1224                         break;
1225                 case V4L2_CID_SATURATION:
1226                         c->type = V4L2_CTRL_TYPE_INTEGER;
1227                         strcpy(c->name, "Saturation");
1228                         c->minimum = 0;
1229                         c->maximum = 63;
1230                         c->step = 1;
1231                         c->default_value = 32;
1232                         c->flags = 0;
1233                         break;
1234                 case V4L2_CID_AGC:
1235                         c->type = V4L2_CTRL_TYPE_INTEGER;
1236                         strcpy(c->name, "Agc");
1237                         c->minimum = 0;
1238                         c->maximum = 63;
1239                         c->step = 1;
1240                         c->default_value = 48;
1241                         c->flags = 0;
1242                         break;
1243                 case V4L2_CID_SHARPNESS:
1244                         c->type = V4L2_CTRL_TYPE_INTEGER;
1245                         strcpy(c->name, "Sharpness");
1246                         c->minimum = 0;
1247                         c->maximum = 63;
1248                         c->step = 1;
1249                         c->default_value = 32;
1250                         c->flags = 0;
1251                         break;
1252                 case V4L2_CID_PICTURE:
1253                         c->type = V4L2_CTRL_TYPE_INTEGER;
1254                         strcpy(c->name, "Picture");
1255                         c->minimum = 0;
1256                         c->maximum = 63;
1257                         c->step = 1;
1258                         c->default_value = 0;
1259                         c->flags = 0;
1260                         break;
1261                 case V4L2_CID_JPEGQUAL:
1262                         c->type = V4L2_CTRL_TYPE_INTEGER;
1263                         strcpy(c->name, "JPEG quality");
1264                         c->minimum = 0;
1265                         c->maximum = 10;
1266                         c->step = 1;
1267                         c->default_value = 8;
1268                         c->flags = 0;
1269                         break;
1270                 case V4L2_CID_FRAMERATE:
1271                         c->type = V4L2_CTRL_TYPE_INTEGER;
1272                         strcpy(c->name, "Framerate");
1273                         c->minimum = 0;
1274                         c->maximum = 31;
1275                         c->step = 1;
1276                         c->default_value = 0;
1277                         c->flags = 0;
1278                         break;
1279                 default:
1280                         return -EINVAL;
1281                 }
1282                 break;
1283         }
1284
1285         case VIDIOC_S_CTRL: {
1286                 struct v4l2_control *c = arg;
1287
1288                 mutex_lock(&meye.lock);
1289                 switch (c->id) {
1290                 case V4L2_CID_BRIGHTNESS:
1291                         sonypi_camera_command(
1292                                 SONYPI_COMMAND_SETCAMERABRIGHTNESS, c->value);
1293                         meye.picture.brightness = c->value << 10;
1294                         break;
1295                 case V4L2_CID_HUE:
1296                         sonypi_camera_command(
1297                                 SONYPI_COMMAND_SETCAMERAHUE, c->value);
1298                         meye.picture.hue = c->value << 10;
1299                         break;
1300                 case V4L2_CID_CONTRAST:
1301                         sonypi_camera_command(
1302                                 SONYPI_COMMAND_SETCAMERACONTRAST, c->value);
1303                         meye.picture.contrast = c->value << 10;
1304                         break;
1305                 case V4L2_CID_SATURATION:
1306                         sonypi_camera_command(
1307                                 SONYPI_COMMAND_SETCAMERACOLOR, c->value);
1308                         meye.picture.colour = c->value << 10;
1309                         break;
1310                 case V4L2_CID_AGC:
1311                         sonypi_camera_command(
1312                                 SONYPI_COMMAND_SETCAMERAAGC, c->value);
1313                         meye.params.agc = c->value;
1314                         break;
1315                 case V4L2_CID_SHARPNESS:
1316                         sonypi_camera_command(
1317                                 SONYPI_COMMAND_SETCAMERASHARPNESS, c->value);
1318                         meye.params.sharpness = c->value;
1319                         break;
1320                 case V4L2_CID_PICTURE:
1321                         sonypi_camera_command(
1322                                 SONYPI_COMMAND_SETCAMERAPICTURE, c->value);
1323                         meye.params.picture = c->value;
1324                         break;
1325                 case V4L2_CID_JPEGQUAL:
1326                         meye.params.quality = c->value;
1327                         break;
1328                 case V4L2_CID_FRAMERATE:
1329                         meye.params.framerate = c->value;
1330                         break;
1331                 default:
1332                         mutex_unlock(&meye.lock);
1333                         return -EINVAL;
1334                 }
1335                 mutex_unlock(&meye.lock);
1336                 break;
1337         }
1338
1339         case VIDIOC_G_CTRL: {
1340                 struct v4l2_control *c = arg;
1341
1342                 mutex_lock(&meye.lock);
1343                 switch (c->id) {
1344                 case V4L2_CID_BRIGHTNESS:
1345                         c->value = meye.picture.brightness >> 10;
1346                         break;
1347                 case V4L2_CID_HUE:
1348                         c->value = meye.picture.hue >> 10;
1349                         break;
1350                 case V4L2_CID_CONTRAST:
1351                         c->value = meye.picture.contrast >> 10;
1352                         break;
1353                 case V4L2_CID_SATURATION:
1354                         c->value = meye.picture.colour >> 10;
1355                         break;
1356                 case V4L2_CID_AGC:
1357                         c->value = meye.params.agc;
1358                         break;
1359                 case V4L2_CID_SHARPNESS:
1360                         c->value = meye.params.sharpness;
1361                         break;
1362                 case V4L2_CID_PICTURE:
1363                         c->value = meye.params.picture;
1364                         break;
1365                 case V4L2_CID_JPEGQUAL:
1366                         c->value = meye.params.quality;
1367                         break;
1368                 case V4L2_CID_FRAMERATE:
1369                         c->value = meye.params.framerate;
1370                         break;
1371                 default:
1372                         mutex_unlock(&meye.lock);
1373                         return -EINVAL;
1374                 }
1375                 mutex_unlock(&meye.lock);
1376                 break;
1377         }
1378
1379         case VIDIOC_ENUM_FMT: {
1380                 struct v4l2_fmtdesc *f = arg;
1381
1382                 if (f->index > 1)
1383                         return -EINVAL;
1384                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1385                         return -EINVAL;
1386                 if (f->index == 0) {
1387                         /* standard YUV 422 capture */
1388                         memset(f, 0, sizeof(*f));
1389                         f->index = 0;
1390                         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1391                         f->flags = 0;
1392                         strcpy(f->description, "YUV422");
1393                         f->pixelformat = V4L2_PIX_FMT_YUYV;
1394                 } else {
1395                         /* compressed MJPEG capture */
1396                         memset(f, 0, sizeof(*f));
1397                         f->index = 1;
1398                         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1399                         f->flags = V4L2_FMT_FLAG_COMPRESSED;
1400                         strcpy(f->description, "MJPEG");
1401                         f->pixelformat = V4L2_PIX_FMT_MJPEG;
1402                 }
1403                 break;
1404         }
1405
1406         case VIDIOC_TRY_FMT: {
1407                 struct v4l2_format *f = arg;
1408
1409                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1410                         return -EINVAL;
1411                 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_YUYV &&
1412                     f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
1413                         return -EINVAL;
1414                 if (f->fmt.pix.field != V4L2_FIELD_ANY &&
1415                     f->fmt.pix.field != V4L2_FIELD_NONE)
1416                         return -EINVAL;
1417                 f->fmt.pix.field = V4L2_FIELD_NONE;
1418                 if (f->fmt.pix.width <= 320) {
1419                         f->fmt.pix.width = 320;
1420                         f->fmt.pix.height = 240;
1421                 } else {
1422                         f->fmt.pix.width = 640;
1423                         f->fmt.pix.height = 480;
1424                 }
1425                 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
1426                 f->fmt.pix.sizeimage = f->fmt.pix.height *
1427                                        f->fmt.pix.bytesperline;
1428                 f->fmt.pix.colorspace = 0;
1429                 f->fmt.pix.priv = 0;
1430                 break;
1431         }
1432
1433         case VIDIOC_G_FMT: {
1434                 struct v4l2_format *f = arg;
1435
1436                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1437                         return -EINVAL;
1438                 memset(&f->fmt.pix, 0, sizeof(struct v4l2_pix_format));
1439                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1440                 switch (meye.mchip_mode) {
1441                 case MCHIP_HIC_MODE_CONT_OUT:
1442                 default:
1443                         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1444                         break;
1445                 case MCHIP_HIC_MODE_CONT_COMP:
1446                         f->fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG;
1447                         break;
1448                 }
1449                 f->fmt.pix.field = V4L2_FIELD_NONE;
1450                 f->fmt.pix.width = mchip_hsize();
1451                 f->fmt.pix.height = mchip_vsize();
1452                 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
1453                 f->fmt.pix.sizeimage = f->fmt.pix.height *
1454                                        f->fmt.pix.bytesperline;
1455                 f->fmt.pix.colorspace = 0;
1456                 f->fmt.pix.priv = 0;
1457                 break;
1458         }
1459
1460         case VIDIOC_S_FMT: {
1461                 struct v4l2_format *f = arg;
1462
1463                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1464                         return -EINVAL;
1465                 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_YUYV &&
1466                     f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
1467                         return -EINVAL;
1468                 if (f->fmt.pix.field != V4L2_FIELD_ANY &&
1469                     f->fmt.pix.field != V4L2_FIELD_NONE)
1470                         return -EINVAL;
1471                 f->fmt.pix.field = V4L2_FIELD_NONE;
1472                 mutex_lock(&meye.lock);
1473                 if (f->fmt.pix.width <= 320) {
1474                         f->fmt.pix.width = 320;
1475                         f->fmt.pix.height = 240;
1476                         meye.params.subsample = 1;
1477                 } else {
1478                         f->fmt.pix.width = 640;
1479                         f->fmt.pix.height = 480;
1480                         meye.params.subsample = 0;
1481                 }
1482                 switch (f->fmt.pix.pixelformat) {
1483                 case V4L2_PIX_FMT_YUYV:
1484                         meye.mchip_mode = MCHIP_HIC_MODE_CONT_OUT;
1485                         break;
1486                 case V4L2_PIX_FMT_MJPEG:
1487                         meye.mchip_mode = MCHIP_HIC_MODE_CONT_COMP;
1488                         break;
1489                 }
1490                 mutex_unlock(&meye.lock);
1491                 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
1492                 f->fmt.pix.sizeimage = f->fmt.pix.height *
1493                                        f->fmt.pix.bytesperline;
1494                 f->fmt.pix.colorspace = 0;
1495                 f->fmt.pix.priv = 0;
1496
1497                 break;
1498         }
1499
1500         case VIDIOC_REQBUFS: {
1501                 struct v4l2_requestbuffers *req = arg;
1502                 int i;
1503
1504                 if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1505                         return -EINVAL;
1506                 if (req->memory != V4L2_MEMORY_MMAP)
1507                         return -EINVAL;
1508                 if (meye.grab_fbuffer && req->count == gbuffers) {
1509                         /* already allocated, no modifications */
1510                         break;
1511                 }
1512                 mutex_lock(&meye.lock);
1513                 if (meye.grab_fbuffer) {
1514                         for (i = 0; i < gbuffers; i++)
1515                                 if (meye.vma_use_count[i]) {
1516                                         mutex_unlock(&meye.lock);
1517                                         return -EINVAL;
1518                                 }
1519                         rvfree(meye.grab_fbuffer, gbuffers * gbufsize);
1520                         meye.grab_fbuffer = NULL;
1521                 }
1522                 gbuffers = max(2, min((int)req->count, MEYE_MAX_BUFNBRS));
1523                 req->count = gbuffers;
1524                 meye.grab_fbuffer = rvmalloc(gbuffers * gbufsize);
1525                 if (!meye.grab_fbuffer) {
1526                         printk(KERN_ERR "meye: v4l framebuffer allocation"
1527                                         " failed\n");
1528                         mutex_unlock(&meye.lock);
1529                         return -ENOMEM;
1530                 }
1531                 for (i = 0; i < gbuffers; i++)
1532                         meye.vma_use_count[i] = 0;
1533                 mutex_unlock(&meye.lock);
1534                 break;
1535         }
1536
1537         case VIDIOC_QUERYBUF: {
1538                 struct v4l2_buffer *buf = arg;
1539                 int index = buf->index;
1540
1541                 if (index < 0 || index >= gbuffers)
1542                         return -EINVAL;
1543                 memset(buf, 0, sizeof(*buf));
1544                 buf->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1545                 buf->index = index;
1546                 buf->bytesused = meye.grab_buffer[index].size;
1547                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1548                 if (meye.grab_buffer[index].state == MEYE_BUF_USING)
1549                         buf->flags |= V4L2_BUF_FLAG_QUEUED;
1550                 if (meye.grab_buffer[index].state == MEYE_BUF_DONE)
1551                         buf->flags |= V4L2_BUF_FLAG_DONE;
1552                 buf->field = V4L2_FIELD_NONE;
1553                 buf->timestamp = meye.grab_buffer[index].timestamp;
1554                 buf->sequence = meye.grab_buffer[index].sequence;
1555                 buf->memory = V4L2_MEMORY_MMAP;
1556                 buf->m.offset = index * gbufsize;
1557                 buf->length = gbufsize;
1558                 break;
1559         }
1560
1561         case VIDIOC_QBUF: {
1562                 struct v4l2_buffer *buf = arg;
1563
1564                 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1565                         return -EINVAL;
1566                 if (buf->memory != V4L2_MEMORY_MMAP)
1567                         return -EINVAL;
1568                 if (buf->index < 0 || buf->index >= gbuffers)
1569                         return -EINVAL;
1570                 if (meye.grab_buffer[buf->index].state != MEYE_BUF_UNUSED)
1571                         return -EINVAL;
1572                 mutex_lock(&meye.lock);
1573                 buf->flags |= V4L2_BUF_FLAG_QUEUED;
1574                 buf->flags &= ~V4L2_BUF_FLAG_DONE;
1575                 meye.grab_buffer[buf->index].state = MEYE_BUF_USING;
1576                 kfifo_put(meye.grabq, (unsigned char *)&buf->index, sizeof(int));
1577                 mutex_unlock(&meye.lock);
1578                 break;
1579         }
1580
1581         case VIDIOC_DQBUF: {
1582                 struct v4l2_buffer *buf = arg;
1583                 int reqnr;
1584
1585                 if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1586                         return -EINVAL;
1587                 if (buf->memory != V4L2_MEMORY_MMAP)
1588                         return -EINVAL;
1589
1590                 mutex_lock(&meye.lock);
1591                 if (kfifo_len(meye.doneq) == 0 && file->f_flags & O_NONBLOCK) {
1592                         mutex_unlock(&meye.lock);
1593                         return -EAGAIN;
1594                 }
1595                 if (wait_event_interruptible(meye.proc_list,
1596                                              kfifo_len(meye.doneq) != 0) < 0) {
1597                         mutex_unlock(&meye.lock);
1598                         return -EINTR;
1599                 }
1600                 if (!kfifo_get(meye.doneq, (unsigned char *)&reqnr,
1601                                sizeof(int))) {
1602                         mutex_unlock(&meye.lock);
1603                         return -EBUSY;
1604                 }
1605                 if (meye.grab_buffer[reqnr].state != MEYE_BUF_DONE) {
1606                         mutex_unlock(&meye.lock);
1607                         return -EINVAL;
1608                 }
1609                 buf->index = reqnr;
1610                 buf->bytesused = meye.grab_buffer[reqnr].size;
1611                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1612                 buf->field = V4L2_FIELD_NONE;
1613                 buf->timestamp = meye.grab_buffer[reqnr].timestamp;
1614                 buf->sequence = meye.grab_buffer[reqnr].sequence;
1615                 buf->memory = V4L2_MEMORY_MMAP;
1616                 buf->m.offset = reqnr * gbufsize;
1617                 buf->length = gbufsize;
1618                 meye.grab_buffer[reqnr].state = MEYE_BUF_UNUSED;
1619                 mutex_unlock(&meye.lock);
1620                 break;
1621         }
1622
1623         case VIDIOC_STREAMON: {
1624                 mutex_lock(&meye.lock);
1625                 switch (meye.mchip_mode) {
1626                 case MCHIP_HIC_MODE_CONT_OUT:
1627                         mchip_continuous_start();
1628                         break;
1629                 case MCHIP_HIC_MODE_CONT_COMP:
1630                         mchip_cont_compression_start();
1631                         break;
1632                 default:
1633                         mutex_unlock(&meye.lock);
1634                         return -EINVAL;
1635                 }
1636                 mutex_unlock(&meye.lock);
1637                 break;
1638         }
1639
1640         case VIDIOC_STREAMOFF: {
1641                 int i;
1642
1643                 mutex_lock(&meye.lock);
1644                 mchip_hic_stop();
1645                 kfifo_reset(meye.grabq);
1646                 kfifo_reset(meye.doneq);
1647                 for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
1648                         meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
1649                 mutex_unlock(&meye.lock);
1650                 break;
1651         }
1652
1653         /*
1654          * XXX what about private snapshot ioctls ?
1655          * Do they need to be converted to V4L2 ?
1656         */
1657
1658         default:
1659                 return -ENOIOCTLCMD;
1660         }
1661
1662         return 0;
1663 }
1664
1665 static int meye_ioctl(struct inode *inode, struct file *file,
1666                      unsigned int cmd, unsigned long arg)
1667 {
1668         return video_usercopy(inode, file, cmd, arg, meye_do_ioctl);
1669 }
1670
1671 static unsigned int meye_poll(struct file *file, poll_table *wait)
1672 {
1673         unsigned int res = 0;
1674
1675         mutex_lock(&meye.lock);
1676         poll_wait(file, &meye.proc_list, wait);
1677         if (kfifo_len(meye.doneq))
1678                 res = POLLIN | POLLRDNORM;
1679         mutex_unlock(&meye.lock);
1680         return res;
1681 }
1682
1683 static void meye_vm_open(struct vm_area_struct *vma)
1684 {
1685         int idx = (int)vma->vm_private_data;
1686         meye.vma_use_count[idx]++;
1687 }
1688
1689 static void meye_vm_close(struct vm_area_struct *vma)
1690 {
1691         int idx = (int)vma->vm_private_data;
1692         meye.vma_use_count[idx]--;
1693 }
1694
1695 static struct vm_operations_struct meye_vm_ops = {
1696         .open           = meye_vm_open,
1697         .close          = meye_vm_close,
1698 };
1699
1700 static int meye_mmap(struct file *file, struct vm_area_struct *vma)
1701 {
1702         unsigned long start = vma->vm_start;
1703         unsigned long size = vma->vm_end - vma->vm_start;
1704         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
1705         unsigned long page, pos;
1706
1707         mutex_lock(&meye.lock);
1708         if (size > gbuffers * gbufsize) {
1709                 mutex_unlock(&meye.lock);
1710                 return -EINVAL;
1711         }
1712         if (!meye.grab_fbuffer) {
1713                 int i;
1714
1715                 /* lazy allocation */
1716                 meye.grab_fbuffer = rvmalloc(gbuffers*gbufsize);
1717                 if (!meye.grab_fbuffer) {
1718                         printk(KERN_ERR "meye: v4l framebuffer allocation failed\n");
1719                         mutex_unlock(&meye.lock);
1720                         return -ENOMEM;
1721                 }
1722                 for (i = 0; i < gbuffers; i++)
1723                         meye.vma_use_count[i] = 0;
1724         }
1725         pos = (unsigned long)meye.grab_fbuffer + offset;
1726
1727         while (size > 0) {
1728                 page = vmalloc_to_pfn((void *)pos);
1729                 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
1730                         mutex_unlock(&meye.lock);
1731                         return -EAGAIN;
1732                 }
1733                 start += PAGE_SIZE;
1734                 pos += PAGE_SIZE;
1735                 if (size > PAGE_SIZE)
1736                         size -= PAGE_SIZE;
1737                 else
1738                         size = 0;
1739         }
1740
1741         vma->vm_ops = &meye_vm_ops;
1742         vma->vm_flags &= ~VM_IO;        /* not I/O memory */
1743         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
1744         vma->vm_private_data = (void *) (offset / gbufsize);
1745         meye_vm_open(vma);
1746
1747         mutex_unlock(&meye.lock);
1748         return 0;
1749 }
1750
1751 static struct file_operations meye_fops = {
1752         .owner          = THIS_MODULE,
1753         .open           = meye_open,
1754         .release        = meye_release,
1755         .mmap           = meye_mmap,
1756         .ioctl          = meye_ioctl,
1757         .compat_ioctl   = v4l_compat_ioctl32,
1758         .poll           = meye_poll,
1759         .llseek         = no_llseek,
1760 };
1761
1762 static struct video_device meye_template = {
1763         .owner          = THIS_MODULE,
1764         .name           = "meye",
1765         .type           = VID_TYPE_CAPTURE,
1766         .hardware       = VID_HARDWARE_MEYE,
1767         .fops           = &meye_fops,
1768         .release        = video_device_release,
1769         .minor          = -1,
1770 };
1771
1772 #ifdef CONFIG_PM
1773 static int meye_suspend(struct pci_dev *pdev, pm_message_t state)
1774 {
1775         pci_save_state(pdev);
1776         meye.pm_mchip_mode = meye.mchip_mode;
1777         mchip_hic_stop();
1778         mchip_set(MCHIP_MM_INTA, 0x0);
1779         return 0;
1780 }
1781
1782 static int meye_resume(struct pci_dev *pdev)
1783 {
1784         pci_restore_state(pdev);
1785         pci_write_config_word(meye.mchip_dev, MCHIP_PCI_SOFTRESET_SET, 1);
1786
1787         mchip_delay(MCHIP_HIC_CMD, 0);
1788         mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);
1789         msleep(1);
1790         mchip_set(MCHIP_VRJ_SOFT_RESET, 1);
1791         msleep(1);
1792         mchip_set(MCHIP_MM_PCI_MODE, 5);
1793         msleep(1);
1794         mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK);
1795
1796         switch (meye.pm_mchip_mode) {
1797         case MCHIP_HIC_MODE_CONT_OUT:
1798                 mchip_continuous_start();
1799                 break;
1800         case MCHIP_HIC_MODE_CONT_COMP:
1801                 mchip_cont_compression_start();
1802                 break;
1803         }
1804         return 0;
1805 }
1806 #endif
1807
1808 static int __devinit meye_probe(struct pci_dev *pcidev,
1809                                 const struct pci_device_id *ent)
1810 {
1811         int ret = -EBUSY;
1812         unsigned long mchip_adr;
1813         u8 revision;
1814
1815         if (meye.mchip_dev != NULL) {
1816                 printk(KERN_ERR "meye: only one device allowed!\n");
1817                 goto outnotdev;
1818         }
1819
1820         meye.mchip_dev = pcidev;
1821         meye.video_dev = video_device_alloc();
1822         if (!meye.video_dev) {
1823                 printk(KERN_ERR "meye: video_device_alloc() failed!\n");
1824                 goto outnotdev;
1825         }
1826
1827         ret = -ENOMEM;
1828         meye.grab_temp = vmalloc(MCHIP_NB_PAGES_MJPEG * PAGE_SIZE);
1829         if (!meye.grab_temp) {
1830                 printk(KERN_ERR "meye: grab buffer allocation failed\n");
1831                 goto outvmalloc;
1832         }
1833
1834         spin_lock_init(&meye.grabq_lock);
1835         meye.grabq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
1836                                  &meye.grabq_lock);
1837         if (IS_ERR(meye.grabq)) {
1838                 printk(KERN_ERR "meye: fifo allocation failed\n");
1839                 goto outkfifoalloc1;
1840         }
1841         spin_lock_init(&meye.doneq_lock);
1842         meye.doneq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
1843                                  &meye.doneq_lock);
1844         if (IS_ERR(meye.doneq)) {
1845                 printk(KERN_ERR "meye: fifo allocation failed\n");
1846                 goto outkfifoalloc2;
1847         }
1848
1849         memcpy(meye.video_dev, &meye_template, sizeof(meye_template));
1850         meye.video_dev->dev = &meye.mchip_dev->dev;
1851
1852         if ((ret = sonypi_camera_command(SONYPI_COMMAND_SETCAMERA, 1))) {
1853                 printk(KERN_ERR "meye: unable to power on the camera\n");
1854                 printk(KERN_ERR "meye: did you enable the camera in "
1855                                 "sonypi using the module options ?\n");
1856                 goto outsonypienable;
1857         }
1858
1859         ret = -EIO;
1860         if ((ret = pci_enable_device(meye.mchip_dev))) {
1861                 printk(KERN_ERR "meye: pci_enable_device failed\n");
1862                 goto outenabledev;
1863         }
1864
1865         mchip_adr = pci_resource_start(meye.mchip_dev,0);
1866         if (!mchip_adr) {
1867                 printk(KERN_ERR "meye: mchip has no device base address\n");
1868                 goto outregions;
1869         }
1870         if (!request_mem_region(pci_resource_start(meye.mchip_dev, 0),
1871                                 pci_resource_len(meye.mchip_dev, 0),
1872                                 "meye")) {
1873                 printk(KERN_ERR "meye: request_mem_region failed\n");
1874                 goto outregions;
1875         }
1876         meye.mchip_mmregs = ioremap(mchip_adr, MCHIP_MM_REGS);
1877         if (!meye.mchip_mmregs) {
1878                 printk(KERN_ERR "meye: ioremap failed\n");
1879                 goto outremap;
1880         }
1881
1882         meye.mchip_irq = pcidev->irq;
1883         if (request_irq(meye.mchip_irq, meye_irq,
1884                         SA_INTERRUPT | SA_SHIRQ, "meye", meye_irq)) {
1885                 printk(KERN_ERR "meye: request_irq failed\n");
1886                 goto outreqirq;
1887         }
1888
1889         pci_read_config_byte(meye.mchip_dev, PCI_REVISION_ID, &revision);
1890         pci_write_config_byte(meye.mchip_dev, PCI_CACHE_LINE_SIZE, 8);
1891         pci_write_config_byte(meye.mchip_dev, PCI_LATENCY_TIMER, 64);
1892
1893         pci_set_master(meye.mchip_dev);
1894
1895         /* Ask the camera to perform a soft reset. */
1896         pci_write_config_word(meye.mchip_dev, MCHIP_PCI_SOFTRESET_SET, 1);
1897
1898         mchip_delay(MCHIP_HIC_CMD, 0);
1899         mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);
1900
1901         msleep(1);
1902         mchip_set(MCHIP_VRJ_SOFT_RESET, 1);
1903
1904         msleep(1);
1905         mchip_set(MCHIP_MM_PCI_MODE, 5);
1906
1907         msleep(1);
1908         mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK);
1909
1910         if (video_register_device(meye.video_dev, VFL_TYPE_GRABBER,
1911                                   video_nr) < 0) {
1912                 printk(KERN_ERR "meye: video_register_device failed\n");
1913                 goto outvideoreg;
1914         }
1915
1916         mutex_init(&meye.lock);
1917         init_waitqueue_head(&meye.proc_list);
1918         meye.picture.depth = 16;
1919         meye.picture.palette = VIDEO_PALETTE_YUV422;
1920         meye.picture.brightness = 32 << 10;
1921         meye.picture.hue = 32 << 10;
1922         meye.picture.colour = 32 << 10;
1923         meye.picture.contrast = 32 << 10;
1924         meye.picture.whiteness = 0;
1925         meye.params.subsample = 0;
1926         meye.params.quality = 8;
1927         meye.params.sharpness = 32;
1928         meye.params.agc = 48;
1929         meye.params.picture = 0;
1930         meye.params.framerate = 0;
1931
1932         sonypi_camera_command(SONYPI_COMMAND_SETCAMERABRIGHTNESS, 32);
1933         sonypi_camera_command(SONYPI_COMMAND_SETCAMERAHUE, 32);
1934         sonypi_camera_command(SONYPI_COMMAND_SETCAMERACOLOR, 32);
1935         sonypi_camera_command(SONYPI_COMMAND_SETCAMERACONTRAST, 32);
1936         sonypi_camera_command(SONYPI_COMMAND_SETCAMERASHARPNESS, 32);
1937         sonypi_camera_command(SONYPI_COMMAND_SETCAMERAPICTURE, 0);
1938         sonypi_camera_command(SONYPI_COMMAND_SETCAMERAAGC, 48);
1939
1940         printk(KERN_INFO "meye: Motion Eye Camera Driver v%s.\n",
1941                MEYE_DRIVER_VERSION);
1942         printk(KERN_INFO "meye: mchip KL5A72002 rev. %d, base %lx, irq %d\n",
1943                revision, mchip_adr, meye.mchip_irq);
1944
1945         return 0;
1946
1947 outvideoreg:
1948         free_irq(meye.mchip_irq, meye_irq);
1949 outreqirq:
1950         iounmap(meye.mchip_mmregs);
1951 outremap:
1952         release_mem_region(pci_resource_start(meye.mchip_dev, 0),
1953                            pci_resource_len(meye.mchip_dev, 0));
1954 outregions:
1955         pci_disable_device(meye.mchip_dev);
1956 outenabledev:
1957         sonypi_camera_command(SONYPI_COMMAND_SETCAMERA, 0);
1958 outsonypienable:
1959         kfifo_free(meye.doneq);
1960 outkfifoalloc2:
1961         kfifo_free(meye.grabq);
1962 outkfifoalloc1:
1963         vfree(meye.grab_temp);
1964 outvmalloc:
1965         video_device_release(meye.video_dev);
1966 outnotdev:
1967         return ret;
1968 }
1969
1970 static void __devexit meye_remove(struct pci_dev *pcidev)
1971 {
1972         video_unregister_device(meye.video_dev);
1973
1974         mchip_hic_stop();
1975
1976         mchip_dma_free();
1977
1978         /* disable interrupts */
1979         mchip_set(MCHIP_MM_INTA, 0x0);
1980
1981         free_irq(meye.mchip_irq, meye_irq);
1982
1983         iounmap(meye.mchip_mmregs);
1984
1985         release_mem_region(pci_resource_start(meye.mchip_dev, 0),
1986                            pci_resource_len(meye.mchip_dev, 0));
1987
1988         pci_disable_device(meye.mchip_dev);
1989
1990         sonypi_camera_command(SONYPI_COMMAND_SETCAMERA, 0);
1991
1992         kfifo_free(meye.doneq);
1993         kfifo_free(meye.grabq);
1994
1995         vfree(meye.grab_temp);
1996
1997         if (meye.grab_fbuffer) {
1998                 rvfree(meye.grab_fbuffer, gbuffers*gbufsize);
1999                 meye.grab_fbuffer = NULL;
2000         }
2001
2002         printk(KERN_INFO "meye: removed\n");
2003 }
2004
2005 static struct pci_device_id meye_pci_tbl[] = {
2006         { PCI_VENDOR_ID_KAWASAKI, PCI_DEVICE_ID_MCHIP_KL5A72002,
2007           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2008         { }
2009 };
2010
2011 MODULE_DEVICE_TABLE(pci, meye_pci_tbl);
2012
2013 static struct pci_driver meye_driver = {
2014         .name           = "meye",
2015         .id_table       = meye_pci_tbl,
2016         .probe          = meye_probe,
2017         .remove         = __devexit_p(meye_remove),
2018 #ifdef CONFIG_PM
2019         .suspend        = meye_suspend,
2020         .resume         = meye_resume,
2021 #endif
2022 };
2023
2024 static int __init meye_init(void)
2025 {
2026         gbuffers = max(2, min((int)gbuffers, MEYE_MAX_BUFNBRS));
2027         if (gbufsize < 0 || gbufsize > MEYE_MAX_BUFSIZE)
2028                 gbufsize = MEYE_MAX_BUFSIZE;
2029         gbufsize = PAGE_ALIGN(gbufsize);
2030         printk(KERN_INFO "meye: using %d buffers with %dk (%dk total)"
2031                          "for capture\n",
2032                          gbuffers,
2033                          gbufsize / 1024, gbuffers * gbufsize / 1024);
2034         return pci_register_driver(&meye_driver);
2035 }
2036
2037 static void __exit meye_exit(void)
2038 {
2039         pci_unregister_driver(&meye_driver);
2040 }
2041
2042 module_init(meye_init);
2043 module_exit(meye_exit);