Merge commit 'origin/master'
[linux-2.6] / 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 }