SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/cx18/cx18-mailbox.c

   1 /*
   2  *  cx18 mailbox functions
   3  *
   4  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19  *  02111-1307  USA
  20  */
  21
  22 #include <stdarg.h>
  23
  24 #include "cx18-driver.h"
  25 #include "cx18-io.h"
  26 #include "cx18-scb.h"
  27 #include "cx18-irq.h"
  28 #include "cx18-mailbox.h"
  29
  30 #define API_FAST (1 << 2) /* Short timeout */
  31 #define API_SLOW (1 << 3) /* Additional 300ms timeout */
  32
  33 struct cx18_api_info {
  34         u32 cmd;
  35         u8 flags;               /* Flags, see above */
  36         u8 rpu;                 /* Processing unit */
  37         const char *name;       /* The name of the command */
  38 };
  39
  40 #define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x }
  41
  42 static const struct cx18_api_info api_info[] = {
  43         /* MPEG encoder API */
  44         API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,               0),
  45         API_ENTRY(CPU, CX18_EPU_DEBUG,                          0),
  46         API_ENTRY(CPU, CX18_CREATE_TASK,                        0),
  47         API_ENTRY(CPU, CX18_DESTROY_TASK,                       0),
  48         API_ENTRY(CPU, CX18_CPU_CAPTURE_START,                  API_SLOW),
  49         API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP,                   API_SLOW),
  50         API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE,                  0),
  51         API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME,                 0),
  52         API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,               0),
  53         API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE,         0),
  54         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN,                   0),
  55         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE,                 0),
  56         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION,           0),
  57         API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM,               0),
  58         API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE,        0),
  59         API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING,              0),
  60         API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE,                 0),
  61         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS,           0),
  62         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE,                 0),
  63         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE,                 0),
  64         API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS,            0),
  65         API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM,              API_SLOW),
  66         API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO,            0),
  67         API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT,                  0),
  68         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID,                  0),
  69         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID,                  0),
  70         API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE,              0),
  71         API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE,              0),
  72         API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION,     0),
  73         API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO,               0),
  74         API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME,           0),
  75         API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM,           0),
  76         API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER,      0),
  77         API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS,                    0),
  78         API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK,                 0),
  79         API_ENTRY(CPU, CX18_CPU_DE_SET_MDL,                     API_FAST),
  80         API_ENTRY(CPU, CX18_APU_RESETAI,                        API_FAST),
  81         API_ENTRY(CPU, CX18_CPU_DE_RELEASE_MDL,                 API_SLOW),
  82         API_ENTRY(0, 0,                                         0),
  83 };
  84
  85 static const struct cx18_api_info *find_api_info(u32 cmd)
  86 {
  87         int i;
  88
  89         for (i = 0; api_info[i].cmd; i++)
  90                 if (api_info[i].cmd == cmd)
  91                         return &api_info[i];
  92         return NULL;
  93 }
  94
  95 static struct cx18_mailbox __iomem *cx18_mb_is_complete(struct cx18 *cx, int rpu,
  96                 u32 *state, u32 *irq, u32 *req)
  97 {
  98         struct cx18_mailbox __iomem *mb = NULL;
  99         int wait_count = 0;
 100         u32 ack;
 101
 102         switch (rpu) {
 103         case APU:
 104                 mb = &cx->scb->epu2apu_mb;
 105                 *state = cx18_readl(cx, &cx->scb->apu_state);
 106                 *irq = cx18_readl(cx, &cx->scb->epu2apu_irq);
 107                 break;
 108
 109         case CPU:
 110                 mb = &cx->scb->epu2cpu_mb;
 111                 *state = cx18_readl(cx, &cx->scb->cpu_state);
 112                 *irq = cx18_readl(cx, &cx->scb->epu2cpu_irq);
 113                 break;
 114
 115         default:
 116                 break;
 117         }
 118
 119         if (mb == NULL)
 120                 return mb;
 121
 122         do {
 123                 *req = cx18_readl(cx, &mb->request);
 124                 ack = cx18_readl(cx, &mb->ack);
 125                 wait_count++;
 126         } while (*req != ack && wait_count < 600);
 127
 128         if (*req == ack) {
 129                 (*req)++;
 130                 if (*req == 0 || *req == 0xffffffff)
 131                         *req = 1;
 132                 return mb;
 133         }
 134         return NULL;
 135 }
 136
 137 long cx18_mb_ack(struct cx18 *cx, const struct cx18_mailbox *mb, int rpu)
 138 {
 139         struct cx18_mailbox __iomem *ack_mb;
 140         u32 ack_irq;
 141
 142         switch (rpu) {
 143         case APU:
 144                 ack_irq = IRQ_EPU_TO_APU_ACK;
 145                 ack_mb = &cx->scb->apu2epu_mb;
 146                 break;
 147         case CPU:
 148                 ack_irq = IRQ_EPU_TO_CPU_ACK;
 149                 ack_mb = &cx->scb->cpu2epu_mb;
 150                 break;
 151         default:
 152                 CX18_WARN("Unhandled RPU (%d) for command %x ack\n",
 153                           rpu, mb->cmd);
 154                 return -EINVAL;
 155         }
 156
 157         cx18_setup_page(cx, SCB_OFFSET);
 158         cx18_write_sync(cx, mb->request, &ack_mb->ack);
 159         cx18_write_reg_expect(cx, ack_irq, SW2_INT_SET, ack_irq, ack_irq);
 160         return 0;
 161 }
 162
 163
 164 static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
 165 {
 166         const struct cx18_api_info *info = find_api_info(cmd);
 167         u32 state = 0, irq = 0, req, oldreq, err;
 168         struct cx18_mailbox __iomem *mb;
 169         wait_queue_head_t *waitq;
 170         struct mutex *mb_lock;
 171         int timeout = 100;
 172         int sig = 0;
 173         int i;
 174
 175         if (info == NULL) {
 176                 CX18_WARN("unknown cmd %x\n", cmd);
 177                 return -EINVAL;
 178         }
 179
 180         if (cmd == CX18_CPU_DE_SET_MDL)
 181                 CX18_DEBUG_HI_API("%s\n", info->name);
 182         else
 183                 CX18_DEBUG_API("%s\n", info->name);
 184
 185         switch (info->rpu) {
 186         case APU:
 187                 waitq = &cx->mb_apu_waitq;
 188                 mb_lock = &cx->epu2apu_mb_lock;
 189                 break;
 190         case CPU:
 191                 waitq = &cx->mb_cpu_waitq;
 192                 mb_lock = &cx->epu2cpu_mb_lock;
 193                 break;
 194         default:
 195                 CX18_WARN("Unknown RPU (%d) for API call\n", info->rpu);
 196                 return -EINVAL;
 197         }
 198
 199         mutex_lock(mb_lock);
 200         cx18_setup_page(cx, SCB_OFFSET);
 201         mb = cx18_mb_is_complete(cx, info->rpu, &state, &irq, &req);
 202
 203         if (mb == NULL) {
 204                 mutex_unlock(mb_lock);
 205                 CX18_ERR("mb %s busy\n", info->name);
 206                 return -EBUSY;
 207         }
 208
 209         oldreq = req - 1;
 210         cx18_writel(cx, cmd, &mb->cmd);
 211         for (i = 0; i < args; i++)
 212                 cx18_writel(cx, data[i], &mb->args[i]);
 213         cx18_writel(cx, 0, &mb->error);
 214         cx18_writel(cx, req, &mb->request);
 215
 216         if (info->flags & API_FAST)
 217                 timeout /= 2;
 218         cx18_write_reg_expect(cx, irq, SW1_INT_SET, irq, irq);
 219
 220         sig = wait_event_interruptible_timeout(
 221                        *waitq,
 222                        cx18_readl(cx, &mb->ack) == cx18_readl(cx, &mb->request),
 223                        msecs_to_jiffies(timeout));
 224         if (sig == 0) {
 225                 /* Timed out */
 226                 cx18_writel(cx, oldreq, &mb->request);
 227                 mutex_unlock(mb_lock);
 228                 CX18_ERR("sending %s timed out waiting for RPU to respond\n",
 229                          info->name);
 230                 return -EINVAL;
 231         } else if (sig < 0) {
 232                 /* Interrupted */
 233                 cx18_writel(cx, oldreq, &mb->request);
 234                 mutex_unlock(mb_lock);
 235                 CX18_WARN("sending %s interrupted waiting for RPU to respond\n",
 236                           info->name);
 237                 return -EINTR;
 238         }
 239
 240         for (i = 0; i < MAX_MB_ARGUMENTS; i++)
 241                 data[i] = cx18_readl(cx, &mb->args[i]);
 242         err = cx18_readl(cx, &mb->error);
 243         mutex_unlock(mb_lock);
 244         if (info->flags & API_SLOW)
 245                 cx18_msleep_timeout(300, 0);
 246         if (err)
 247                 CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
 248                                 info->name);
 249         return err ? -EIO : 0;
 250 }
 251
 252 int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[])
 253 {
 254         int res = cx18_api_call(cx, cmd, args, data);
 255
 256         /* Allow a single retry, probably already too late though.
 257            If there is no free mailbox then that is usually an indication
 258            of a more serious problem. */
 259         return (res == -EBUSY) ? cx18_api_call(cx, cmd, args, data) : res;
 260 }
 261
 262 static int cx18_set_filter_param(struct cx18_stream *s)
 263 {
 264         struct cx18 *cx = s->cx;
 265         u32 mode;
 266         int ret;
 267
 268         mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0);
 269         ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 270                         s->handle, 1, mode, cx->spatial_strength);
 271         mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0);
 272         ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 273                         s->handle, 0, mode, cx->temporal_strength);
 274         ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 275                         s->handle, 2, cx->filter_mode >> 2, 0);
 276         return ret;
 277 }
 278
 279 int cx18_api_func(void *priv, u32 cmd, int in, int out,
 280                 u32 data[CX2341X_MBOX_MAX_DATA])
 281 {
 282         struct cx18 *cx = priv;
 283         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 284
 285         switch (cmd) {
 286         case CX2341X_ENC_SET_OUTPUT_PORT:
 287                 return 0;
 288         case CX2341X_ENC_SET_FRAME_RATE:
 289                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6,
 290                                 s->handle, 0, 0, 0, 0, data[0]);
 291         case CX2341X_ENC_SET_FRAME_SIZE:
 292                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3,
 293                                 s->handle, data[1], data[0]);
 294         case CX2341X_ENC_SET_STREAM_TYPE:
 295                 return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2,
 296                                 s->handle, data[0]);
 297         case CX2341X_ENC_SET_ASPECT_RATIO:
 298                 return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2,
 299                                 s->handle, data[0]);
 300
 301         case CX2341X_ENC_SET_GOP_PROPERTIES:
 302                 return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3,
 303                                 s->handle, data[0], data[1]);
 304         case CX2341X_ENC_SET_GOP_CLOSURE:
 305                 return 0;
 306         case CX2341X_ENC_SET_AUDIO_PROPERTIES:
 307                 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2,
 308                                 s->handle, data[0]);
 309         case CX2341X_ENC_MUTE_AUDIO:
 310                 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2,
 311                                 s->handle, data[0]);
 312         case CX2341X_ENC_SET_BIT_RATE:
 313                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5,
 314                                 s->handle, data[0], data[1], data[2], data[3]);
 315         case CX2341X_ENC_MUTE_VIDEO:
 316                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
 317                                 s->handle, data[0]);
 318         case CX2341X_ENC_SET_FRAME_DROP_RATE:
 319                 return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2,
 320                                 s->handle, data[0]);
 321         case CX2341X_ENC_MISC:
 322                 return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4,
 323                                 s->handle, data[0], data[1], data[2]);
 324         case CX2341X_ENC_SET_DNR_FILTER_MODE:
 325                 cx->filter_mode = (data[0] & 3) | (data[1] << 2);
 326                 return cx18_set_filter_param(s);
 327         case CX2341X_ENC_SET_DNR_FILTER_PROPS:
 328                 cx->spatial_strength = data[0];
 329                 cx->temporal_strength = data[1];
 330                 return cx18_set_filter_param(s);
 331         case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
 332                 return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3,
 333                                 s->handle, data[0], data[1]);
 334         case CX2341X_ENC_SET_CORING_LEVELS:
 335                 return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5,
 336                                 s->handle, data[0], data[1], data[2], data[3]);
 337         }
 338         CX18_WARN("Unknown cmd %x\n", cmd);
 339         return 0;
 340 }
 341
 342 int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS],
 343                 u32 cmd, int args, ...)
 344 {
 345         va_list ap;
 346         int i;
 347
 348         va_start(ap, args);
 349         for (i = 0; i < args; i++)
 350                 data[i] = va_arg(ap, u32);
 351         va_end(ap);
 352         return cx18_api(cx, cmd, args, data);
 353 }
 354
 355 int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
 356 {
 357         u32 data[MAX_MB_ARGUMENTS];
 358         va_list ap;
 359         int i;
 360
 361         if (cx == NULL) {
 362                 CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
 363                 return 0;
 364         }
 365         if (args > MAX_MB_ARGUMENTS) {
 366                 CX18_ERR("args too big (cmd=%x)\n", cmd);
 367                 args = MAX_MB_ARGUMENTS;
 368         }
 369         va_start(ap, args);
 370         for (i = 0; i < args; i++)
 371                 data[i] = va_arg(ap, u32);
 372         va_end(ap);
 373         return cx18_api(cx, cmd, args, data);
 374 }