Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 1 | /* |
| 2 | * $Id$ |
| 3 | * |
| 4 | * Copyright (C) 2005 Mike Isely <isely@pobox.com> |
| 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 |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include "pvrusb2-context.h" |
| 22 | #include "pvrusb2-io.h" |
| 23 | #include "pvrusb2-ioread.h" |
| 24 | #include "pvrusb2-hdw.h" |
| 25 | #include "pvrusb2-debug.h" |
| 26 | #include <linux/errno.h> |
| 27 | #include <linux/string.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <asm/semaphore.h> |
| 30 | |
| 31 | |
| 32 | static void pvr2_context_destroy(struct pvr2_context *mp) |
| 33 | { |
| 34 | if (mp->hdw) pvr2_hdw_destroy(mp->hdw); |
| 35 | pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr_main id=%p",mp); |
| 36 | flush_workqueue(mp->workqueue); |
| 37 | destroy_workqueue(mp->workqueue); |
| 38 | kfree(mp); |
| 39 | } |
| 40 | |
| 41 | |
| 42 | static void pvr2_context_trigger_poll(struct pvr2_context *mp) |
| 43 | { |
| 44 | queue_work(mp->workqueue,&mp->workpoll); |
| 45 | } |
| 46 | |
| 47 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame^] | 48 | static void pvr2_context_poll(struct work_struct *work) |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 49 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame^] | 50 | struct pvr2_context *mp = |
| 51 | container_of(work, struct pvr2_context, workpoll); |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 52 | pvr2_context_enter(mp); do { |
| 53 | pvr2_hdw_poll(mp->hdw); |
| 54 | } while (0); pvr2_context_exit(mp); |
| 55 | } |
| 56 | |
| 57 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame^] | 58 | static void pvr2_context_setup(struct work_struct *work) |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 59 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame^] | 60 | struct pvr2_context *mp = |
| 61 | container_of(work, struct pvr2_context, workinit); |
| 62 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 63 | pvr2_context_enter(mp); do { |
| 64 | if (!pvr2_hdw_dev_ok(mp->hdw)) break; |
| 65 | pvr2_hdw_setup(mp->hdw); |
| 66 | pvr2_hdw_setup_poll_trigger( |
| 67 | mp->hdw, |
| 68 | (void (*)(void *))pvr2_context_trigger_poll, |
| 69 | mp); |
| 70 | if (!pvr2_hdw_dev_ok(mp->hdw)) break; |
| 71 | if (!pvr2_hdw_init_ok(mp->hdw)) break; |
| 72 | mp->video_stream.stream = pvr2_hdw_get_video_stream(mp->hdw); |
| 73 | if (mp->setup_func) { |
| 74 | mp->setup_func(mp); |
| 75 | } |
| 76 | } while (0); pvr2_context_exit(mp); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | struct pvr2_context *pvr2_context_create( |
| 81 | struct usb_interface *intf, |
| 82 | const struct usb_device_id *devid, |
| 83 | void (*setup_func)(struct pvr2_context *)) |
| 84 | { |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 85 | struct pvr2_context *mp = NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 86 | mp = kmalloc(sizeof(*mp),GFP_KERNEL); |
| 87 | if (!mp) goto done; |
| 88 | memset(mp,0,sizeof(*mp)); |
| 89 | pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr_main id=%p",mp); |
| 90 | mp->setup_func = setup_func; |
| 91 | mutex_init(&mp->mutex); |
| 92 | mp->hdw = pvr2_hdw_create(intf,devid); |
| 93 | if (!mp->hdw) { |
| 94 | pvr2_context_destroy(mp); |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 95 | mp = NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 96 | goto done; |
| 97 | } |
| 98 | |
| 99 | mp->workqueue = create_singlethread_workqueue("pvrusb2"); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame^] | 100 | INIT_WORK(&mp->workinit, pvr2_context_setup); |
| 101 | INIT_WORK(&mp->workpoll, pvr2_context_poll); |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 102 | queue_work(mp->workqueue,&mp->workinit); |
| 103 | done: |
| 104 | return mp; |
| 105 | } |
| 106 | |
| 107 | |
| 108 | void pvr2_context_enter(struct pvr2_context *mp) |
| 109 | { |
| 110 | mutex_lock(&mp->mutex); |
| 111 | pvr2_trace(PVR2_TRACE_CREG,"pvr2_context_enter(id=%p)",mp); |
| 112 | } |
| 113 | |
| 114 | |
| 115 | void pvr2_context_exit(struct pvr2_context *mp) |
| 116 | { |
| 117 | int destroy_flag = 0; |
| 118 | if (!(mp->mc_first || !mp->disconnect_flag)) { |
| 119 | destroy_flag = !0; |
| 120 | } |
| 121 | pvr2_trace(PVR2_TRACE_CREG,"pvr2_context_exit(id=%p) outside",mp); |
| 122 | mutex_unlock(&mp->mutex); |
| 123 | if (destroy_flag) pvr2_context_destroy(mp); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | static void pvr2_context_run_checks(struct pvr2_context *mp) |
| 128 | { |
| 129 | struct pvr2_channel *ch1,*ch2; |
| 130 | for (ch1 = mp->mc_first; ch1; ch1 = ch2) { |
| 131 | ch2 = ch1->mc_next; |
| 132 | if (ch1->check_func) { |
| 133 | ch1->check_func(ch1); |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | |
| 139 | void pvr2_context_disconnect(struct pvr2_context *mp) |
| 140 | { |
| 141 | pvr2_context_enter(mp); do { |
| 142 | pvr2_hdw_disconnect(mp->hdw); |
| 143 | mp->disconnect_flag = !0; |
| 144 | pvr2_context_run_checks(mp); |
| 145 | } while (0); pvr2_context_exit(mp); |
| 146 | } |
| 147 | |
| 148 | |
| 149 | void pvr2_channel_init(struct pvr2_channel *cp,struct pvr2_context *mp) |
| 150 | { |
| 151 | cp->hdw = mp->hdw; |
| 152 | cp->mc_head = mp; |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 153 | cp->mc_next = NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 154 | cp->mc_prev = mp->mc_last; |
| 155 | if (mp->mc_last) { |
| 156 | mp->mc_last->mc_next = cp; |
| 157 | } else { |
| 158 | mp->mc_first = cp; |
| 159 | } |
| 160 | mp->mc_last = cp; |
| 161 | } |
| 162 | |
| 163 | |
| 164 | static void pvr2_channel_disclaim_stream(struct pvr2_channel *cp) |
| 165 | { |
| 166 | if (!cp->stream) return; |
| 167 | pvr2_stream_kill(cp->stream->stream); |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 168 | cp->stream->user = NULL; |
| 169 | cp->stream = NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | |
| 173 | void pvr2_channel_done(struct pvr2_channel *cp) |
| 174 | { |
| 175 | struct pvr2_context *mp = cp->mc_head; |
| 176 | pvr2_channel_disclaim_stream(cp); |
| 177 | if (cp->mc_next) { |
| 178 | cp->mc_next->mc_prev = cp->mc_prev; |
| 179 | } else { |
| 180 | mp->mc_last = cp->mc_prev; |
| 181 | } |
| 182 | if (cp->mc_prev) { |
| 183 | cp->mc_prev->mc_next = cp->mc_next; |
| 184 | } else { |
| 185 | mp->mc_first = cp->mc_next; |
| 186 | } |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 187 | cp->hdw = NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | |
| 191 | int pvr2_channel_claim_stream(struct pvr2_channel *cp, |
| 192 | struct pvr2_context_stream *sp) |
| 193 | { |
| 194 | int code = 0; |
| 195 | pvr2_context_enter(cp->mc_head); do { |
| 196 | if (sp == cp->stream) break; |
| 197 | if (sp->user) { |
| 198 | code = -EBUSY; |
| 199 | break; |
| 200 | } |
| 201 | pvr2_channel_disclaim_stream(cp); |
| 202 | if (!sp) break; |
| 203 | sp->user = cp; |
| 204 | cp->stream = sp; |
| 205 | } while (0); pvr2_context_exit(cp->mc_head); |
| 206 | return code; |
| 207 | } |
| 208 | |
| 209 | |
| 210 | // This is the marker for the real beginning of a legitimate mpeg2 stream. |
| 211 | static char stream_sync_key[] = { |
| 212 | 0x00, 0x00, 0x01, 0xba, |
| 213 | }; |
| 214 | |
| 215 | struct pvr2_ioread *pvr2_channel_create_mpeg_stream( |
| 216 | struct pvr2_context_stream *sp) |
| 217 | { |
| 218 | struct pvr2_ioread *cp; |
| 219 | cp = pvr2_ioread_create(); |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 220 | if (!cp) return NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 221 | pvr2_ioread_setup(cp,sp->stream); |
| 222 | pvr2_ioread_set_sync_key(cp,stream_sync_key,sizeof(stream_sync_key)); |
| 223 | return cp; |
| 224 | } |
| 225 | |
| 226 | |
| 227 | /* |
| 228 | Stuff for Emacs to see, in order to encourage consistent editing style: |
| 229 | *** Local Variables: *** |
| 230 | *** mode: c *** |
| 231 | *** fill-column: 75 *** |
| 232 | *** tab-width: 8 *** |
| 233 | *** c-basic-offset: 8 *** |
| 234 | *** End: *** |
| 235 | */ |