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-scb.h"
  26 #include "cx18-irq.h"
  27 #include "cx18-mailbox.h"
  28
  29 #define API_FAST (1 << 2) /* Short timeout */
  30 #define API_SLOW (1 << 3) /* Additional 300ms timeout */
  31
  32 #define APU 0
  33 #define CPU 1
  34 #define EPU 2
  35 #define HPU 3
  36
  37 struct cx18_api_info {
  38         u32 cmd;
  39         u8 flags;               /* Flags, see above */
  40         u8 rpu;                 /* Processing unit */
  41         const char *name;       /* The name of the command */
  42 };
  43
  44 #define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x }
  45
  46 static const struct cx18_api_info api_info[] = {
  47         /* MPEG encoder API */
  48         API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,               0),
  49         API_ENTRY(CPU, CX18_EPU_DEBUG,                          0),
  50         API_ENTRY(CPU, CX18_CREATE_TASK,                        0),
  51         API_ENTRY(CPU, CX18_DESTROY_TASK,                       0),
  52         API_ENTRY(CPU, CX18_CPU_CAPTURE_START,                  API_SLOW),
  53         API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP,                   API_SLOW),
  54         API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE,                  0),
  55         API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME,                 0),
  56         API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,               0),
  57         API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE,         0),
  58         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN,                   0),
  59         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE,                 0),
  60         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION,           0),
  61         API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM,               0),
  62         API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE,        0),
  63         API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING,              0),
  64         API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE,                 0),
  65         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS,           0),
  66         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE,                 0),
  67         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE,                 0),
  68         API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS,            0),
  69         API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM,              API_SLOW),
  70         API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO,            0),
  71         API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT,                  0),
  72         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID,                  0),
  73         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID,                  0),
  74         API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE,              0),
  75         API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE,              0),
  76         API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION,     0),
  77         API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO,               0),
  78         API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME,           0),
  79         API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM,           0),
  80         API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER,      0),
  81         API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS,                    0),
  82         API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK,                 0),
  83         API_ENTRY(CPU, CX18_CPU_DE_SET_MDL,                     API_FAST),
  84         API_ENTRY(CPU, CX18_APU_RESETAI,                        API_FAST),
  85         API_ENTRY(0, 0,                                         0),
  86 };
  87
  88 static const struct cx18_api_info *find_api_info(u32 cmd)
  89 {
  90         int i;
  91
  92         for (i = 0; api_info[i].cmd; i++)
  93                 if (api_info[i].cmd == cmd)
  94                         return &api_info[i];
  95         return NULL;
  96 }
  97
  98 static struct cx18_mailbox __iomem *cx18_mb_is_complete(struct cx18 *cx, int rpu,
  99                 u32 *state, u32 *irq, u32 *req)
 100 {
 101         struct cx18_mailbox __iomem *mb = NULL;
 102         int wait_count = 0;
 103         u32 ack;
 104
 105         switch (rpu) {
 106         case APU:
 107                 mb = &cx->scb->epu2apu_mb;
 108                 *state = readl(&cx->scb->apu_state);
 109                 *irq = readl(&cx->scb->epu2apu_irq);
 110                 break;
 111
 112         case CPU:
 113                 mb = &cx->scb->epu2cpu_mb;
 114                 *state = readl(&cx->scb->cpu_state);
 115                 *irq = readl(&cx->scb->epu2cpu_irq);
 116                 break;
 117
 118         case HPU:
 119                 mb = &cx->scb->epu2hpu_mb;
 120                 *state = readl(&cx->scb->hpu_state);
 121                 *irq = readl(&cx->scb->epu2hpu_irq);
 122                 break;
 123         }
 124
 125         if (mb == NULL)
 126                 return mb;
 127
 128         do {
 129                 *req = readl(&mb->request);
 130                 ack = readl(&mb->ack);
 131                 wait_count++;
 132         } while (*req != ack && wait_count < 600);
 133
 134         if (*req == ack) {
 135                 (*req)++;
 136                 if (*req == 0 || *req == 0xffffffff)
 137                         *req = 1;
 138                 return mb;
 139         }
 140         return NULL;
 141 }
 142
 143 long cx18_mb_ack(struct cx18 *cx, const struct cx18_mailbox *mb)
 144 {
 145         const struct cx18_api_info *info = find_api_info(mb->cmd);
 146         struct cx18_mailbox __iomem *ack_mb;
 147         u32 ack_irq;
 148         u8 rpu = CPU;
 149
 150         if (info == NULL && mb->cmd) {
 151                 CX18_WARN("Cannot ack unknown command %x\n", mb->cmd);
 152                 return -EINVAL;
 153         }
 154         if (info)
 155                 rpu = info->rpu;
 156
 157         switch (rpu) {
 158         case HPU:
 159                 ack_irq = IRQ_EPU_TO_HPU_ACK;
 160                 ack_mb = &cx->scb->hpu2epu_mb;
 161                 break;
 162         case APU:
 163                 ack_irq = IRQ_EPU_TO_APU_ACK;
 164                 ack_mb = &cx->scb->apu2epu_mb;
 165                 break;
 166         case CPU:
 167                 ack_irq = IRQ_EPU_TO_CPU_ACK;
 168                 ack_mb = &cx->scb->cpu2epu_mb;
 169                 break;
 170         default:
 171                 CX18_WARN("Unknown RPU for command %x\n", mb->cmd);
 172                 return -EINVAL;
 173         }
 174
 175         setup_page(SCB_OFFSET);
 176         write_sync(mb->request, &ack_mb->ack);
 177         write_reg(ack_irq, SW2_INT_SET);
 178         return 0;
 179 }
 180
 181
 182 static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
 183 {
 184         const struct cx18_api_info *info = find_api_info(cmd);
 185         u32 state = 0, irq = 0, req, oldreq, err;
 186         struct cx18_mailbox __iomem *mb;
 187         wait_queue_head_t *waitq;
 188         int timeout = 100;
 189         int cnt = 0;
 190         int sig = 0;
 191         int i;
 192
 193         if (info == NULL) {
 194                 CX18_WARN("unknown cmd %x\n", cmd);
 195                 return -EINVAL;
 196         }
 197
 198         if (cmd == CX18_CPU_DE_SET_MDL)
 199                 CX18_DEBUG_HI_API("%s\n", info->name);
 200         else
 201                 CX18_DEBUG_API("%s\n", info->name);
 202         setup_page(SCB_OFFSET);
 203         mb = cx18_mb_is_complete(cx, info->rpu, &state, &irq, &req);
 204
 205         if (mb == NULL) {
 206                 CX18_ERR("mb %s busy\n", info->name);
 207                 return -EBUSY;
 208         }
 209
 210         oldreq = req - 1;
 211         writel(cmd, &mb->cmd);
 212         for (i = 0; i < args; i++)
 213                 writel(data[i], &mb->args[i]);
 214         writel(0, &mb->error);
 215         writel(req, &mb->request);
 216
 217         switch (info->rpu) {
 218         case APU: waitq = &cx->mb_apu_waitq; break;
 219         case CPU: waitq = &cx->mb_cpu_waitq; break;
 220         case EPU: waitq = &cx->mb_epu_waitq; break;
 221         case HPU: waitq = &cx->mb_hpu_waitq; break;
 222         default: return -EINVAL;
 223         }
 224         if (info->flags & API_FAST)
 225                 timeout /= 2;
 226         write_reg(irq, SW1_INT_SET);
 227
 228         while (!sig && readl(&mb->ack) != readl(&mb->request) && cnt < 660) {
 229                 if (cnt > 200 && !in_atomic())
 230                         sig = cx18_msleep_timeout(10, 1);
 231                 cnt++;
 232         }
 233         if (sig)
 234                 return -EINTR;
 235         if (cnt == 660) {
 236                 writel(oldreq, &mb->request);
 237                 CX18_ERR("mb %s failed\n", info->name);
 238                 return -EINVAL;
 239         }
 240         for (i = 0; i < MAX_MB_ARGUMENTS; i++)
 241                 data[i] = readl(&mb->args[i]);
 242         err = readl(&mb->error);
 243         if (!in_atomic() && (info->flags & API_SLOW))
 244                 cx18_msleep_timeout(300, 0);
 245         if (err)
 246                 CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
 247                                 info->name);
 248         return err ? -EIO : 0;
 249 }
 250
 251 int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[])
 252 {
 253         int res = cx18_api_call(cx, cmd, args, data);
 254
 255         /* Allow a single retry, probably already too late though.
 256            If there is no free mailbox then that is usually an indication
 257            of a more serious problem. */
 258         return (res == -EBUSY) ? cx18_api_call(cx, cmd, args, data) : res;
 259 }
 260
 261 static int cx18_set_filter_param(struct cx18_stream *s)
 262 {
 263         struct cx18 *cx = s->cx;
 264         u32 mode;
 265         int ret;
 266
 267         mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0);
 268         ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 269                         s->handle, 1, mode, cx->spatial_strength);
 270         mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0);
 271         ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 272                         s->handle, 0, mode, cx->temporal_strength);
 273         ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 274                         s->handle, 2, cx->filter_mode >> 2, 0);
 275         return ret;
 276 }
 277
 278 int cx18_api_func(void *priv, u32 cmd, int in, int out,
 279                 u32 data[CX2341X_MBOX_MAX_DATA])
 280 {
 281         struct cx18 *cx = priv;
 282         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 283
 284         switch (cmd) {
 285         case CX2341X_ENC_SET_OUTPUT_PORT:
 286                 return 0;
 287         case CX2341X_ENC_SET_FRAME_RATE:
 288                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6,
 289                                 s->handle, 0, 0, 0, 0, data[0]);
 290         case CX2341X_ENC_SET_FRAME_SIZE:
 291                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3,
 292                                 s->handle, data[1], data[0]);
 293         case CX2341X_ENC_SET_STREAM_TYPE:
 294                 return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2,
 295                                 s->handle, data[0]);
 296         case CX2341X_ENC_SET_ASPECT_RATIO:
 297                 return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2,
 298                                 s->handle, data[0]);
 299
 300         case CX2341X_ENC_SET_GOP_PROPERTIES:
 301                 return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3,
 302                                 s->handle, data[0], data[1]);
 303         case CX2341X_ENC_SET_GOP_CLOSURE:
 304                 return 0;
 305         case CX2341X_ENC_SET_AUDIO_PROPERTIES:
 306                 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2,
 307                                 s->handle, data[0]);
 308         case CX2341X_ENC_MUTE_AUDIO:
 309                 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2,
 310                                 s->handle, data[0]);
 311         case CX2341X_ENC_SET_BIT_RATE:
 312                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5,
 313                                 s->handle, data[0], data[1], data[2], data[3]);
 314         case CX2341X_ENC_MUTE_VIDEO:
 315                 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
 316                                 s->handle, data[0]);
 317         case CX2341X_ENC_SET_FRAME_DROP_RATE:
 318                 return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2,
 319                                 s->handle, data[0]);
 320         case CX2341X_ENC_MISC:
 321                 return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4,
 322                                 s->handle, data[0], data[1], data[2]);
 323         case CX2341X_ENC_SET_DNR_FILTER_MODE:
 324                 cx->filter_mode = (data[0] & 3) | (data[1] << 2);
 325                 return cx18_set_filter_param(s);
 326         case CX2341X_ENC_SET_DNR_FILTER_PROPS:
 327                 cx->spatial_strength = data[0];
 328                 cx->temporal_strength = data[1];
 329                 return cx18_set_filter_param(s);
 330         case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
 331                 return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3,
 332                                 s->handle, data[0], data[1]);
 333         case CX2341X_ENC_SET_CORING_LEVELS:
 334                 return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5,
 335                                 s->handle, data[0], data[1], data[2], data[3]);
 336         }
 337         CX18_WARN("Unknown cmd %x\n", cmd);
 338         return 0;
 339 }
 340
 341 int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS],
 342                 u32 cmd, int args, ...)
 343 {
 344         va_list ap;
 345         int i;
 346
 347         va_start(ap, args);
 348         for (i = 0; i < args; i++)
 349                 data[i] = va_arg(ap, u32);
 350         va_end(ap);
 351         return cx18_api(cx, cmd, args, data);
 352 }
 353
 354 int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
 355 {
 356         u32 data[MAX_MB_ARGUMENTS];
 357         va_list ap;
 358         int i;
 359
 360         if (cx == NULL) {
 361                 CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
 362                 return 0;
 363         }
 364         if (args > MAX_MB_ARGUMENTS) {
 365                 CX18_ERR("args too big (cmd=%x)\n", cmd);
 366                 args = MAX_MB_ARGUMENTS;
 367         }
 368         va_start(ap, args);
 369         for (i = 0; i < args; i++)
 370                 data[i] = va_arg(ap, u32);
 371         va_end(ap);
 372         return cx18_api(cx, cmd, args, data);
 373 }