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-rw-r--r--sound/usb/card.h58
-rw-r--r--sound/usb/endpoint.c928
-rw-r--r--sound/usb/endpoint.h26
-rw-r--r--sound/usb/usbaudio.h1
4 files changed, 1002 insertions, 11 deletions
diff --git a/sound/usb/card.h b/sound/usb/card.h
index da5fa1ac4ed..9acbd4a1228 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -30,13 +30,17 @@ struct audioformat {
30}; 30};
31 31
32struct snd_usb_substream; 32struct snd_usb_substream;
33struct snd_usb_endpoint;
33 34
34struct snd_urb_ctx { 35struct snd_urb_ctx {
35 struct urb *urb; 36 struct urb *urb;
36 unsigned int buffer_size; /* size of data buffer, if data URB */ 37 unsigned int buffer_size; /* size of data buffer, if data URB */
37 struct snd_usb_substream *subs; 38 struct snd_usb_substream *subs;
39 struct snd_usb_endpoint *ep;
38 int index; /* index for urb array */ 40 int index; /* index for urb array */
39 int packets; /* number of packets per urb */ 41 int packets; /* number of packets per urb */
42 int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */
43 struct list_head ready_list;
40}; 44};
41 45
42struct snd_urb_ops { 46struct snd_urb_ops {
@@ -46,6 +50,60 @@ struct snd_urb_ops {
46 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); 50 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
47}; 51};
48 52
53struct snd_usb_endpoint {
54 struct snd_usb_audio *chip;
55
56 int use_count;
57 int ep_num; /* the referenced endpoint number */
58 int type; /* SND_USB_ENDPOINT_TYPE_* */
59 unsigned long flags;
60
61 void (*prepare_data_urb) (struct snd_usb_substream *subs,
62 struct urb *urb);
63 void (*retire_data_urb) (struct snd_usb_substream *subs,
64 struct urb *urb);
65
66 struct snd_usb_substream *data_subs;
67 struct snd_usb_endpoint *sync_master;
68 struct snd_usb_endpoint *sync_slave;
69
70 struct snd_urb_ctx urb[MAX_URBS];
71
72 struct snd_usb_packet_info {
73 uint32_t packet_size[MAX_PACKS_HS];
74 int packets;
75 } next_packet[MAX_URBS];
76 int next_packet_read_pos, next_packet_write_pos;
77 struct list_head ready_playback_urbs;
78
79 unsigned int nurbs; /* # urbs */
80 unsigned long active_mask; /* bitmask of active urbs */
81 unsigned long unlink_mask; /* bitmask of unlinked urbs */
82 char *syncbuf; /* sync buffer for all sync URBs */
83 dma_addr_t sync_dma; /* DMA address of syncbuf */
84
85 unsigned int pipe; /* the data i/o pipe */
86 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
87 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
88 int freqshift; /* how much to shift the feedback value to get Q16.16 */
89 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
90 unsigned int phase; /* phase accumulator */
91 unsigned int maxpacksize; /* max packet size in bytes */
92 unsigned int maxframesize; /* max packet size in frames */
93 unsigned int curpacksize; /* current packet size in bytes (for capture) */
94 unsigned int curframesize; /* current packet size in frames (for capture) */
95 unsigned int syncmaxsize; /* sync endpoint packet size */
96 unsigned int fill_max:1; /* fill max packet size always */
97 unsigned int datainterval; /* log_2 of data packet interval */
98 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
99 unsigned char silence_value;
100 unsigned int stride;
101 int iface, alt_idx;
102
103 spinlock_t lock;
104 struct list_head list;
105};
106
49struct snd_usb_substream { 107struct snd_usb_substream {
50 struct snd_usb_stream *stream; 108 struct snd_usb_stream *stream;
51 struct usb_device *dev; 109 struct usb_device *dev;
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 08dcce53720..ea25265427a 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -20,9 +20,11 @@
20#include <linux/ratelimit.h> 20#include <linux/ratelimit.h>
21#include <linux/usb.h> 21#include <linux/usb.h>
22#include <linux/usb/audio.h> 22#include <linux/usb/audio.h>
23#include <linux/slab.h>
23 24
24#include <sound/core.h> 25#include <sound/core.h>
25#include <sound/pcm.h> 26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
26 28
27#include "usbaudio.h" 29#include "usbaudio.h"
28#include "helper.h" 30#include "helper.h"
@@ -30,6 +32,9 @@
30#include "endpoint.h" 32#include "endpoint.h"
31#include "pcm.h" 33#include "pcm.h"
32 34
35#define EP_FLAG_ACTIVATED 0
36#define EP_FLAG_RUNNING 1
37
33/* 38/*
34 * convert a sampling rate into our full speed format (fs/1000 in Q16.16) 39 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
35 * this will overflow at approx 524 kHz 40 * this will overflow at approx 524 kHz
@@ -51,7 +56,7 @@ static inline unsigned get_usb_high_speed_rate(unsigned int rate)
51/* 56/*
52 * unlink active urbs. 57 * unlink active urbs.
53 */ 58 */
54static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep) 59static int deactivate_urbs_old(struct snd_usb_substream *subs, int force, int can_sleep)
55{ 60{
56 struct snd_usb_audio *chip = subs->stream->chip; 61 struct snd_usb_audio *chip = subs->stream->chip;
57 unsigned int i; 62 unsigned int i;
@@ -113,7 +118,7 @@ static void release_urb_ctx(struct snd_urb_ctx *u)
113/* 118/*
114 * wait until all urbs are processed. 119 * wait until all urbs are processed.
115 */ 120 */
116static int wait_clear_urbs(struct snd_usb_substream *subs) 121static int wait_clear_urbs_old(struct snd_usb_substream *subs)
117{ 122{
118 unsigned long end_time = jiffies + msecs_to_jiffies(1000); 123 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
119 unsigned int i; 124 unsigned int i;
@@ -148,8 +153,8 @@ void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force)
148 int i; 153 int i;
149 154
150 /* stop urbs (to be sure) */ 155 /* stop urbs (to be sure) */
151 deactivate_urbs(subs, force, 1); 156 deactivate_urbs_old(subs, force, 1);
152 wait_clear_urbs(subs); 157 wait_clear_urbs_old(subs);
153 158
154 for (i = 0; i < MAX_URBS; i++) 159 for (i = 0; i < MAX_URBS; i++)
155 release_urb_ctx(&subs->dataurb[i]); 160 release_urb_ctx(&subs->dataurb[i]);
@@ -164,7 +169,7 @@ void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force)
164/* 169/*
165 * complete callback from data urb 170 * complete callback from data urb
166 */ 171 */
167static void snd_complete_urb(struct urb *urb) 172static void snd_complete_urb_old(struct urb *urb)
168{ 173{
169 struct snd_urb_ctx *ctx = urb->context; 174 struct snd_urb_ctx *ctx = urb->context;
170 struct snd_usb_substream *subs = ctx->subs; 175 struct snd_usb_substream *subs = ctx->subs;
@@ -318,7 +323,7 @@ int snd_usb_init_substream_urbs(struct snd_usb_substream *subs,
318 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; 323 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
319 u->urb->interval = 1 << subs->datainterval; 324 u->urb->interval = 1 << subs->datainterval;
320 u->urb->context = u; 325 u->urb->context = u;
321 u->urb->complete = snd_complete_urb; 326 u->urb->complete = snd_complete_urb_old;
322 } 327 }
323 328
324 if (subs->syncpipe) { 329 if (subs->syncpipe) {
@@ -856,7 +861,7 @@ static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *ru
856 861
857 __error: 862 __error:
858 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN); 863 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
859 deactivate_urbs(subs, 0, 0); 864 deactivate_urbs_old(subs, 0, 0);
860 return -EPIPE; 865 return -EPIPE;
861} 866}
862 867
@@ -917,7 +922,7 @@ int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int
917 subs->ops.prepare = prepare_playback_urb; 922 subs->ops.prepare = prepare_playback_urb;
918 return 0; 923 return 0;
919 case SNDRV_PCM_TRIGGER_STOP: 924 case SNDRV_PCM_TRIGGER_STOP:
920 return deactivate_urbs(subs, 0, 0); 925 return deactivate_urbs_old(subs, 0, 0);
921 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 926 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
922 subs->ops.prepare = prepare_nodata_playback_urb; 927 subs->ops.prepare = prepare_nodata_playback_urb;
923 return 0; 928 return 0;
@@ -935,7 +940,7 @@ int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int c
935 subs->ops.retire = retire_capture_urb; 940 subs->ops.retire = retire_capture_urb;
936 return start_urbs(subs, substream->runtime); 941 return start_urbs(subs, substream->runtime);
937 case SNDRV_PCM_TRIGGER_STOP: 942 case SNDRV_PCM_TRIGGER_STOP:
938 return deactivate_urbs(subs, 0, 0); 943 return deactivate_urbs_old(subs, 0, 0);
939 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 944 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
940 subs->ops.retire = retire_paused_capture_urb; 945 subs->ops.retire = retire_paused_capture_urb;
941 return 0; 946 return 0;
@@ -951,8 +956,8 @@ int snd_usb_substream_prepare(struct snd_usb_substream *subs,
951 struct snd_pcm_runtime *runtime) 956 struct snd_pcm_runtime *runtime)
952{ 957{
953 /* clear urbs (to be sure) */ 958 /* clear urbs (to be sure) */
954 deactivate_urbs(subs, 0, 1); 959 deactivate_urbs_old(subs, 0, 1);
955 wait_clear_urbs(subs); 960 wait_clear_urbs_old(subs);
956 961
957 /* for playback, submit the URBs now; otherwise, the first hwptr_done 962 /* for playback, submit the URBs now; otherwise, the first hwptr_done
958 * updates for all URBs would happen at the same time when starting */ 963 * updates for all URBs would happen at the same time when starting */
@@ -964,3 +969,904 @@ int snd_usb_substream_prepare(struct snd_usb_substream *subs,
964 return 0; 969 return 0;
965} 970}
966 971
972int snd_usb_endpoint_implict_feedback_sink(struct snd_usb_endpoint *ep)
973{
974 return ep->sync_master &&
975 ep->sync_master->type == SND_USB_ENDPOINT_TYPE_DATA &&
976 ep->type == SND_USB_ENDPOINT_TYPE_DATA &&
977 usb_pipeout(ep->pipe);
978}
979
980/* determine the number of frames in the next packet */
981static int next_packet_size(struct snd_usb_endpoint *ep)
982{
983 unsigned long flags;
984 int ret;
985
986 if (ep->fill_max)
987 return ep->maxframesize;
988
989 spin_lock_irqsave(&ep->lock, flags);
990 ep->phase = (ep->phase & 0xffff)
991 + (ep->freqm << ep->datainterval);
992 ret = min(ep->phase >> 16, ep->maxframesize);
993 spin_unlock_irqrestore(&ep->lock, flags);
994
995 return ret;
996}
997
998static void retire_outbound_urb(struct snd_usb_endpoint *ep,
999 struct snd_urb_ctx *urb_ctx)
1000{
1001 if (ep->retire_data_urb)
1002 ep->retire_data_urb(ep->data_subs, urb_ctx->urb);
1003}
1004
1005static void retire_inbound_urb(struct snd_usb_endpoint *ep,
1006 struct snd_urb_ctx *urb_ctx)
1007{
1008 struct urb *urb = urb_ctx->urb;
1009
1010 if (ep->sync_slave)
1011 snd_usb_handle_sync_urb(ep->sync_slave, ep, urb);
1012
1013 if (ep->retire_data_urb)
1014 ep->retire_data_urb(ep->data_subs, urb);
1015}
1016
1017static void prepare_outbound_urb_sizes(struct snd_usb_endpoint *ep,
1018 struct snd_urb_ctx *ctx)
1019{
1020 int i;
1021
1022 for (i = 0; i < ctx->packets; ++i)
1023 ctx->packet_size[i] = next_packet_size(ep);
1024}
1025
1026/*
1027 * Prepare a PLAYBACK urb for submission to the bus.
1028 */
1029static void prepare_outbound_urb(struct snd_usb_endpoint *ep,
1030 struct snd_urb_ctx *ctx)
1031{
1032 int i;
1033 struct urb *urb = ctx->urb;
1034 unsigned char *cp = urb->transfer_buffer;
1035
1036 urb->dev = ep->chip->dev; /* we need to set this at each time */
1037
1038 switch (ep->type) {
1039 case SND_USB_ENDPOINT_TYPE_DATA:
1040 if (ep->prepare_data_urb) {
1041 ep->prepare_data_urb(ep->data_subs, urb);
1042 } else {
1043 /* no data provider, so send silence */
1044 unsigned int offs = 0;
1045 for (i = 0; i < ctx->packets; ++i) {
1046 int counts = ctx->packet_size[i];
1047 urb->iso_frame_desc[i].offset = offs * ep->stride;
1048 urb->iso_frame_desc[i].length = counts * ep->stride;
1049 offs += counts;
1050 }
1051
1052 urb->number_of_packets = ctx->packets;
1053 urb->transfer_buffer_length = offs * ep->stride;
1054 memset(urb->transfer_buffer, ep->silence_value,
1055 offs * ep->stride);
1056 }
1057 break;
1058
1059 case SND_USB_ENDPOINT_TYPE_SYNC:
1060 if (snd_usb_get_speed(ep->chip->dev) >= USB_SPEED_HIGH) {
1061 /*
1062 * fill the length and offset of each urb descriptor.
1063 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
1064 */
1065 urb->iso_frame_desc[0].length = 4;
1066 urb->iso_frame_desc[0].offset = 0;
1067 cp[0] = ep->freqn;
1068 cp[1] = ep->freqn >> 8;
1069 cp[2] = ep->freqn >> 16;
1070 cp[3] = ep->freqn >> 24;
1071 } else {
1072 /*
1073 * fill the length and offset of each urb descriptor.
1074 * the fixed 10.14 frequency is passed through the pipe.
1075 */
1076 urb->iso_frame_desc[0].length = 3;
1077 urb->iso_frame_desc[0].offset = 0;
1078 cp[0] = ep->freqn >> 2;
1079 cp[1] = ep->freqn >> 10;
1080 cp[2] = ep->freqn >> 18;
1081 }
1082
1083 break;
1084 }
1085}
1086
1087/*
1088 * Prepare a CAPTURE or SYNC urb for submission to the bus.
1089 */
1090static inline void prepare_inbound_urb(struct snd_usb_endpoint *ep,
1091 struct snd_urb_ctx *urb_ctx)
1092{
1093 int i, offs;
1094 struct urb *urb = urb_ctx->urb;
1095
1096 urb->dev = ep->chip->dev; /* we need to set this at each time */
1097
1098 switch (ep->type) {
1099 case SND_USB_ENDPOINT_TYPE_DATA:
1100 offs = 0;
1101 for (i = 0; i < urb_ctx->packets; i++) {
1102 urb->iso_frame_desc[i].offset = offs;
1103 urb->iso_frame_desc[i].length = ep->curpacksize;
1104 offs += ep->curpacksize;
1105 }
1106
1107 urb->transfer_buffer_length = offs;
1108 urb->number_of_packets = urb_ctx->packets;
1109 break;
1110
1111 case SND_USB_ENDPOINT_TYPE_SYNC:
1112 urb->iso_frame_desc[0].length = min(4u, ep->syncmaxsize);
1113 urb->iso_frame_desc[0].offset = 0;
1114 break;
1115 }
1116}
1117
1118static void queue_pending_output_urbs(struct snd_usb_endpoint *ep)
1119{
1120 while (test_bit(EP_FLAG_RUNNING, &ep->flags)) {
1121
1122 unsigned long flags;
1123 struct snd_usb_packet_info *packet;
1124 struct snd_urb_ctx *ctx = NULL;
1125 struct urb *urb;
1126 int err, i;
1127
1128 spin_lock_irqsave(&ep->lock, flags);
1129 if (ep->next_packet_read_pos != ep->next_packet_write_pos) {
1130 packet = ep->next_packet + ep->next_packet_read_pos;
1131 ep->next_packet_read_pos++;
1132 ep->next_packet_read_pos %= MAX_URBS;
1133
1134 /* take URB out of FIFO */
1135 if (!list_empty(&ep->ready_playback_urbs))
1136 ctx = list_first_entry(&ep->ready_playback_urbs,
1137 struct snd_urb_ctx, ready_list);
1138 }
1139 spin_unlock_irqrestore(&ep->lock, flags);
1140
1141 if (ctx == NULL)
1142 return;
1143
1144 list_del_init(&ctx->ready_list);
1145 urb = ctx->urb;
1146
1147 /* copy over the length information */
1148 for (i = 0; i < packet->packets; i++)
1149 ctx->packet_size[i] = packet->packet_size[i];
1150
1151 prepare_outbound_urb(ep, ctx);
1152
1153 err = usb_submit_urb(ctx->urb, GFP_ATOMIC);
1154 if (err < 0)
1155 snd_printk(KERN_ERR "Unable to submit urb #%d: %d (urb %p)\n",
1156 ctx->index, err, ctx->urb);
1157 else
1158 set_bit(ctx->index, &ep->active_mask);
1159 }
1160}
1161
1162/*
1163 * complete callback for urbs
1164 */
1165static void snd_complete_urb(struct urb *urb)
1166{
1167 struct snd_urb_ctx *ctx = urb->context;
1168 struct snd_usb_endpoint *ep = ctx->ep;
1169 int err;
1170
1171 if (unlikely(urb->status == -ENOENT || /* unlinked */
1172 urb->status == -ENODEV || /* device removed */
1173 urb->status == -ECONNRESET || /* unlinked */
1174 urb->status == -ESHUTDOWN || /* device disabled */
1175 ep->chip->shutdown)) /* device disconnected */
1176 goto exit_clear;
1177
1178 if (usb_pipeout(ep->pipe)) {
1179 retire_outbound_urb(ep, ctx);
1180 /* can be stopped during retire callback */
1181 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
1182 goto exit_clear;
1183
1184 if (snd_usb_endpoint_implict_feedback_sink(ep)) {
1185 unsigned long flags;
1186
1187 spin_lock_irqsave(&ep->lock, flags);
1188 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
1189 spin_unlock_irqrestore(&ep->lock, flags);
1190 queue_pending_output_urbs(ep);
1191
1192 goto exit_clear;
1193 }
1194
1195 prepare_outbound_urb_sizes(ep, ctx);
1196 prepare_outbound_urb(ep, ctx);
1197 } else {
1198 retire_inbound_urb(ep, ctx);
1199 /* can be stopped during retire callback */
1200 if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
1201 goto exit_clear;
1202
1203 prepare_inbound_urb(ep, ctx);
1204 }
1205
1206 err = usb_submit_urb(urb, GFP_ATOMIC);
1207 if (err == 0)
1208 return;
1209
1210 snd_printk(KERN_ERR "cannot submit urb (err = %d)\n", err);
1211 //snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1212
1213exit_clear:
1214 clear_bit(ctx->index, &ep->active_mask);
1215}
1216
1217struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
1218 struct usb_host_interface *alts,
1219 int ep_num, int direction, int type)
1220{
1221 struct list_head *p;
1222 struct snd_usb_endpoint *ep;
1223 int ret, is_playback = direction == SNDRV_PCM_STREAM_PLAYBACK;
1224
1225 mutex_lock(&chip->mutex);
1226
1227 list_for_each(p, &chip->ep_list) {
1228 ep = list_entry(p, struct snd_usb_endpoint, list);
1229 if (ep->ep_num == ep_num &&
1230 ep->iface == alts->desc.bInterfaceNumber &&
1231 ep->alt_idx == alts->desc.bAlternateSetting) {
1232 snd_printdd(KERN_DEBUG "Re-using EP %x in iface %d,%d @%p\n",
1233 ep_num, ep->iface, ep->alt_idx, ep);
1234 goto __exit_unlock;
1235 }
1236 }
1237
1238 snd_printdd(KERN_DEBUG "Creating new %s %s endpoint #%x\n",
1239 is_playback ? "playback" : "capture",
1240 type == SND_USB_ENDPOINT_TYPE_DATA ? "data" : "sync",
1241 ep_num);
1242
1243 /* select the alt setting once so the endpoints become valid */
1244 ret = usb_set_interface(chip->dev, alts->desc.bInterfaceNumber,
1245 alts->desc.bAlternateSetting);
1246 if (ret < 0) {
1247 snd_printk(KERN_ERR "%s(): usb_set_interface() failed, ret = %d\n",
1248 __func__, ret);
1249 ep = NULL;
1250 goto __exit_unlock;
1251 }
1252
1253 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1254 if (!ep)
1255 goto __exit_unlock;
1256
1257 ep->chip = chip;
1258 spin_lock_init(&ep->lock);
1259 ep->type = type;
1260 ep->ep_num = ep_num;
1261 ep->iface = alts->desc.bInterfaceNumber;
1262 ep->alt_idx = alts->desc.bAlternateSetting;
1263 INIT_LIST_HEAD(&ep->ready_playback_urbs);
1264 ep_num &= USB_ENDPOINT_NUMBER_MASK;
1265
1266 if (is_playback)
1267 ep->pipe = usb_sndisocpipe(chip->dev, ep_num);
1268 else
1269 ep->pipe = usb_rcvisocpipe(chip->dev, ep_num);
1270
1271 if (type == SND_USB_ENDPOINT_TYPE_SYNC) {
1272 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1273 get_endpoint(alts, 1)->bRefresh >= 1 &&
1274 get_endpoint(alts, 1)->bRefresh <= 9)
1275 ep->syncinterval = get_endpoint(alts, 1)->bRefresh;
1276 else if (snd_usb_get_speed(chip->dev) == USB_SPEED_FULL)
1277 ep->syncinterval = 1;
1278 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1279 get_endpoint(alts, 1)->bInterval <= 16)
1280 ep->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1281 else
1282 ep->syncinterval = 3;
1283
1284 ep->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
1285 }
1286
1287 list_add_tail(&ep->list, &chip->ep_list);
1288
1289__exit_unlock:
1290 mutex_unlock(&chip->mutex);
1291
1292 return ep;
1293}
1294
1295/*
1296 * wait until all urbs are processed.
1297 */
1298static int wait_clear_urbs(struct snd_usb_endpoint *ep)
1299{
1300 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1301 unsigned int i;
1302 int alive;
1303
1304 do {
1305 alive = 0;
1306 for (i = 0; i < ep->nurbs; i++)
1307 if (test_bit(i, &ep->active_mask))
1308 alive++;
1309
1310 if (!alive)
1311 break;
1312
1313 schedule_timeout_uninterruptible(1);
1314 } while (time_before(jiffies, end_time));
1315
1316 if (alive)
1317 snd_printk(KERN_ERR "timeout: still %d active urbs on EP #%x\n",
1318 alive, ep->ep_num);
1319
1320 return 0;
1321}
1322
1323/*
1324 * unlink active urbs.
1325 */
1326static int deactivate_urbs(struct snd_usb_endpoint *ep, int force, int can_sleep)
1327{
1328 unsigned long flags;
1329 unsigned int i;
1330 int async;
1331
1332 if (!force && ep->chip->shutdown) /* to be sure... */
1333 return -EBADFD;
1334
1335 async = !can_sleep && ep->chip->async_unlink;
1336
1337 clear_bit(EP_FLAG_RUNNING, &ep->flags);
1338
1339 INIT_LIST_HEAD(&ep->ready_playback_urbs);
1340 ep->next_packet_read_pos = 0;
1341 ep->next_packet_write_pos = 0;
1342
1343 if (!async && in_interrupt())
1344 return 0;
1345
1346 for (i = 0; i < ep->nurbs; i++) {
1347 if (test_bit(i, &ep->active_mask)) {
1348 if (!test_and_set_bit(i, &ep->unlink_mask)) {
1349 struct urb *u = ep->urb[i].urb;
1350 if (async)
1351 usb_unlink_urb(u);
1352 else
1353 usb_kill_urb(u);
1354 }
1355 }
1356 }
1357
1358 return 0;
1359}
1360
1361/*
1362 * release an endpoint's urbs
1363 */
1364static void release_urbs(struct snd_usb_endpoint *ep, int force)
1365{
1366 int i;
1367
1368 /* route incoming urbs to nirvana */
1369 ep->retire_data_urb = NULL;
1370 ep->prepare_data_urb = NULL;
1371
1372 /* stop urbs */
1373 deactivate_urbs(ep, force, 1);
1374 wait_clear_urbs(ep);
1375
1376 for (i = 0; i < ep->nurbs; i++)
1377 release_urb_ctx(&ep->urb[i]);
1378
1379 if (ep->syncbuf)
1380 usb_free_coherent(ep->chip->dev, SYNC_URBS * 4,
1381 ep->syncbuf, ep->sync_dma);
1382
1383 ep->syncbuf = NULL;
1384 ep->nurbs = 0;
1385}
1386
1387static int data_ep_set_params(struct snd_usb_endpoint *ep,
1388 struct snd_pcm_hw_params *hw_params,
1389 struct audioformat *fmt,
1390 struct snd_usb_endpoint *sync_ep)
1391{
1392 unsigned int maxsize, i, urb_packs, total_packs, packs_per_ms;
1393 int period_bytes = params_period_bytes(hw_params);
1394 int format = params_format(hw_params);
1395 int is_playback = usb_pipeout(ep->pipe);
1396 int frame_bits = snd_pcm_format_physical_width(params_format(hw_params)) *
1397 params_channels(hw_params);
1398
1399 ep->datainterval = fmt->datainterval;
1400 ep->stride = frame_bits >> 3;
1401 ep->silence_value = format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0;
1402
1403 /* calculate max. frequency */
1404 if (ep->maxpacksize) {
1405 /* whatever fits into a max. size packet */
1406 maxsize = ep->maxpacksize;
1407 ep->freqmax = (maxsize / (frame_bits >> 3))
1408 << (16 - ep->datainterval);
1409 } else {
1410 /* no max. packet size: just take 25% higher than nominal */
1411 ep->freqmax = ep->freqn + (ep->freqn >> 2);
1412 maxsize = ((ep->freqmax + 0xffff) * (frame_bits >> 3))
1413 >> (16 - ep->datainterval);
1414 }
1415
1416 if (ep->fill_max)
1417 ep->curpacksize = ep->maxpacksize;
1418 else
1419 ep->curpacksize = maxsize;
1420
1421 if (snd_usb_get_speed(ep->chip->dev) != USB_SPEED_FULL)
1422 packs_per_ms = 8 >> ep->datainterval;
1423 else
1424 packs_per_ms = 1;
1425
1426 if (is_playback && !snd_usb_endpoint_implict_feedback_sink(ep)) {
1427 urb_packs = max(ep->chip->nrpacks, 1);
1428 urb_packs = min(urb_packs, (unsigned int) MAX_PACKS);
1429 } else {
1430 urb_packs = 1;
1431 }
1432
1433 urb_packs *= packs_per_ms;
1434
1435 if (sync_ep && !snd_usb_endpoint_implict_feedback_sink(ep))
1436 urb_packs = min(urb_packs, 1U << sync_ep->syncinterval);
1437
1438 /* decide how many packets to be used */
1439 if (is_playback && !snd_usb_endpoint_implict_feedback_sink(ep)) {
1440 unsigned int minsize, maxpacks;
1441 /* determine how small a packet can be */
1442 minsize = (ep->freqn >> (16 - ep->datainterval))
1443 * (frame_bits >> 3);
1444 /* with sync from device, assume it can be 12% lower */
1445 if (sync_ep)
1446 minsize -= minsize >> 3;
1447 minsize = max(minsize, 1u);
1448 total_packs = (period_bytes + minsize - 1) / minsize;
1449 /* we need at least two URBs for queueing */
1450 if (total_packs < 2) {
1451 total_packs = 2;
1452 } else {
1453 /* and we don't want too long a queue either */
1454 maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2);
1455 total_packs = min(total_packs, maxpacks);
1456 }
1457 } else {
1458 while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
1459 urb_packs >>= 1;
1460 total_packs = MAX_URBS * urb_packs;
1461 }
1462
1463 ep->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1464 if (ep->nurbs > MAX_URBS) {
1465 /* too much... */
1466 ep->nurbs = MAX_URBS;
1467 total_packs = MAX_URBS * urb_packs;
1468 } else if (ep->nurbs < 2) {
1469 /* too little - we need at least two packets
1470 * to ensure contiguous playback/capture
1471 */
1472 ep->nurbs = 2;
1473 }
1474
1475 /* allocate and initialize data urbs */
1476 for (i = 0; i < ep->nurbs; i++) {
1477 struct snd_urb_ctx *u = &ep->urb[i];
1478 u->index = i;
1479 u->ep = ep;
1480 u->packets = (i + 1) * total_packs / ep->nurbs
1481 - i * total_packs / ep->nurbs;
1482 u->buffer_size = maxsize * u->packets;
1483
1484 if (fmt->fmt_type == UAC_FORMAT_TYPE_II)
1485 u->packets++; /* for transfer delimiter */
1486 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
1487 if (!u->urb)
1488 goto out_of_memory;
1489
1490 u->urb->transfer_buffer =
1491 usb_alloc_coherent(ep->chip->dev, u->buffer_size,
1492 GFP_KERNEL, &u->urb->transfer_dma);
1493 if (!u->urb->transfer_buffer)
1494 goto out_of_memory;
1495 u->urb->pipe = ep->pipe;
1496 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1497 u->urb->interval = 1 << ep->datainterval;
1498 u->urb->context = u;
1499 u->urb->complete = snd_complete_urb;
1500 INIT_LIST_HEAD(&u->ready_list);
1501 }
1502
1503 return 0;
1504
1505out_of_memory:
1506 release_urbs(ep, 0);
1507 return -ENOMEM;
1508}
1509
1510static int sync_ep_set_params(struct snd_usb_endpoint *ep,
1511 struct snd_pcm_hw_params *hw_params,
1512 struct audioformat *fmt)
1513{
1514 int i;
1515
1516 ep->syncbuf = usb_alloc_coherent(ep->chip->dev, SYNC_URBS * 4,
1517 GFP_KERNEL, &ep->sync_dma);
1518 if (!ep->syncbuf)
1519 return -ENOMEM;
1520
1521 for (i = 0; i < SYNC_URBS; i++) {
1522 struct snd_urb_ctx *u = &ep->urb[i];
1523 u->index = i;
1524 u->ep = ep;
1525 u->packets = 1;
1526 u->urb = usb_alloc_urb(1, GFP_KERNEL);
1527 if (!u->urb)
1528 goto out_of_memory;
1529 u->urb->transfer_buffer = ep->syncbuf + i * 4;
1530 u->urb->transfer_dma = ep->sync_dma + i * 4;
1531 u->urb->transfer_buffer_length = 4;
1532 u->urb->pipe = ep->pipe;
1533 u->urb->transfer_flags = URB_ISO_ASAP |
1534 URB_NO_TRANSFER_DMA_MAP;
1535 u->urb->number_of_packets = 1;
1536 u->urb->interval = 1 << ep->syncinterval;
1537 u->urb->context = u;
1538 u->urb->complete = snd_complete_urb;
1539 }
1540
1541 ep->nurbs = SYNC_URBS;
1542
1543 return 0;
1544
1545out_of_memory:
1546 release_urbs(ep, 0);
1547 return -ENOMEM;
1548}
1549
1550int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
1551 struct snd_pcm_hw_params *hw_params,
1552 struct audioformat *fmt,
1553 struct snd_usb_endpoint *sync_ep)
1554{
1555 int err;
1556
1557 if (ep->use_count != 0) {
1558 snd_printk(KERN_WARNING "Unable to change format on ep #%x: already in use\n",
1559 ep->ep_num);
1560 return -EBUSY;
1561 }
1562
1563 /* release old buffers, if any */
1564 release_urbs(ep, 0);
1565
1566 ep->datainterval = fmt->datainterval;
1567 ep->maxpacksize = fmt->maxpacksize;
1568 ep->fill_max = fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX;
1569
1570 if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL)
1571 ep->freqn = get_usb_full_speed_rate(params_rate(hw_params));
1572 else
1573 ep->freqn = get_usb_high_speed_rate(params_rate(hw_params));
1574
1575 /* calculate the frequency in 16.16 format */
1576 ep->freqm = ep->freqn;
1577 ep->freqshift = INT_MIN;
1578
1579 ep->phase = 0;
1580
1581 switch (ep->type) {
1582 case SND_USB_ENDPOINT_TYPE_DATA:
1583 err = data_ep_set_params(ep, hw_params, fmt, sync_ep);
1584 break;
1585 case SND_USB_ENDPOINT_TYPE_SYNC:
1586 err = sync_ep_set_params(ep, hw_params, fmt);
1587 break;
1588 default:
1589 err = -EINVAL;
1590 }
1591
1592 snd_printdd(KERN_DEBUG "Setting params for ep #%x (type %d, %d urbs), ret=%d\n",
1593 ep->ep_num, ep->type, ep->nurbs, err);
1594
1595 return err;
1596}
1597
1598int snd_usb_endpoint_start(struct snd_usb_endpoint *ep)
1599{
1600 int err;
1601 unsigned int i;
1602
1603 if (ep->chip->shutdown)
1604 return -EBADFD;
1605
1606 /* already running? */
1607 if (++ep->use_count != 1)
1608 return 0;
1609
1610 if (snd_BUG_ON(!test_bit(EP_FLAG_ACTIVATED, &ep->flags)))
1611 return -EINVAL;
1612
1613 /* just to be sure */
1614 deactivate_urbs(ep, 0, 1);
1615 wait_clear_urbs(ep);
1616
1617 ep->active_mask = 0;
1618 ep->unlink_mask = 0;
1619 ep->phase = 0;
1620
1621 /*
1622 * If this endpoint has a data endpoint as implicit feedback source,
1623 * don't start the urbs here. Instead, mark them all as available,
1624 * wait for the record urbs to arrive and queue from that context.
1625 */
1626
1627 set_bit(EP_FLAG_RUNNING, &ep->flags);
1628
1629 if (snd_usb_endpoint_implict_feedback_sink(ep)) {
1630 for (i = 0; i < ep->nurbs; i++) {
1631 struct snd_urb_ctx *ctx = ep->urb + i;
1632 list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
1633 }
1634
1635 return 0;
1636 }
1637
1638 for (i = 0; i < ep->nurbs; i++) {
1639 struct urb *urb = ep->urb[i].urb;
1640
1641 if (snd_BUG_ON(!urb))
1642 goto __error;
1643
1644 if (usb_pipeout(ep->pipe)) {
1645 prepare_outbound_urb_sizes(ep, urb->context);
1646 prepare_outbound_urb(ep, urb->context);
1647 } else {
1648 prepare_inbound_urb(ep, urb->context);
1649 }
1650
1651 err = usb_submit_urb(urb, GFP_ATOMIC);
1652 if (err < 0) {
1653 snd_printk(KERN_ERR "cannot submit urb %d, error %d: %s\n",
1654 i, err, usb_error_string(err));
1655 goto __error;
1656 }
1657 set_bit(i, &ep->active_mask);
1658 }
1659
1660 return 0;
1661
1662__error:
1663 clear_bit(EP_FLAG_RUNNING, &ep->flags);
1664 ep->use_count--;
1665 deactivate_urbs(ep, 0, 0);
1666 return -EPIPE;
1667}
1668
1669void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep,
1670 int force, int can_sleep, int wait)
1671{
1672 if (!ep)
1673 return;
1674
1675 if (snd_BUG_ON(ep->use_count == 0))
1676 return;
1677
1678 if (snd_BUG_ON(!test_bit(EP_FLAG_ACTIVATED, &ep->flags)))
1679 return;
1680
1681 if (--ep->use_count == 0) {
1682 deactivate_urbs(ep, force, can_sleep);
1683 ep->data_subs = NULL;
1684 ep->sync_slave = NULL;
1685 ep->retire_data_urb = NULL;
1686 ep->prepare_data_urb = NULL;
1687
1688 if (wait)
1689 wait_clear_urbs(ep);
1690 }
1691}
1692
1693int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep)
1694{
1695 if (ep->use_count != 0)
1696 return 0;
1697
1698 if (!ep->chip->shutdown &&
1699 !test_and_set_bit(EP_FLAG_ACTIVATED, &ep->flags)) {
1700 int ret;
1701
1702 ret = usb_set_interface(ep->chip->dev, ep->iface, ep->alt_idx);
1703 if (ret < 0) {
1704 snd_printk(KERN_ERR "%s() usb_set_interface() failed, ret = %d\n",
1705 __func__, ret);
1706 clear_bit(EP_FLAG_ACTIVATED, &ep->flags);
1707 return ret;
1708 }
1709
1710 return 0;
1711 }
1712
1713 return -EBUSY;
1714}
1715
1716int snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep)
1717{
1718 if (!ep)
1719 return -EINVAL;
1720
1721 if (ep->use_count != 0)
1722 return 0;
1723
1724 if (!ep->chip->shutdown &&
1725 test_and_clear_bit(EP_FLAG_ACTIVATED, &ep->flags)) {
1726 int ret;
1727
1728 ret = usb_set_interface(ep->chip->dev, ep->iface, 0);
1729 if (ret < 0) {
1730 snd_printk(KERN_ERR "%s(): usb_set_interface() failed, ret = %d\n",
1731 __func__, ret);
1732 return ret;
1733 }
1734
1735 return 0;
1736 }
1737
1738 return -EBUSY;
1739}
1740
1741void snd_usb_endpoint_free(struct list_head *head)
1742{
1743 struct snd_usb_endpoint *ep;
1744
1745 ep = list_entry(head, struct snd_usb_endpoint, list);
1746 release_urbs(ep, 1);
1747 kfree(ep);
1748}
1749
1750/*
1751 * process after playback sync complete
1752 *
1753 * Full speed devices report feedback values in 10.14 format as samples per
1754 * frame, high speed devices in 16.16 format as samples per microframe.
1755 * Because the Audio Class 1 spec was written before USB 2.0, many high speed
1756 * devices use a wrong interpretation, some others use an entirely different
1757 * format. Therefore, we cannot predict what format any particular device uses
1758 * and must detect it automatically.
1759 */
1760void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
1761 struct snd_usb_endpoint *sender,
1762 const struct urb *urb)
1763{
1764 int shift;
1765 unsigned int f;
1766 unsigned long flags;
1767
1768 snd_BUG_ON(ep == sender);
1769
1770 if (snd_usb_endpoint_implict_feedback_sink(ep) &&
1771 ep->use_count != 0) {
1772
1773 /* implicit feedback case */
1774 int i, bytes = 0;
1775 struct snd_urb_ctx *in_ctx;
1776 struct snd_usb_packet_info *out_packet;
1777
1778 in_ctx = urb->context;
1779
1780 /* Count overall packet size */
1781 for (i = 0; i < in_ctx->packets; i++)
1782 if (urb->iso_frame_desc[i].status == 0)
1783 bytes += urb->iso_frame_desc[i].actual_length;
1784
1785 /*
1786 * skip empty packets. At least M-Audio's Fast Track Ultra stops
1787 * streaming once it received a 0-byte OUT URB
1788 */
1789 if (bytes == 0)
1790 return;
1791
1792 spin_lock_irqsave(&ep->lock, flags);
1793 out_packet = ep->next_packet + ep->next_packet_write_pos;
1794
1795 /*
1796 * Iterate through the inbound packet and prepare the lengths
1797 * for the output packet. The OUT packet we are about to send
1798 * will have the same amount of payload than the IN packet we
1799 * just received.
1800 */
1801
1802 out_packet->packets = in_ctx->packets;
1803 for (i = 0; i < in_ctx->packets; i++) {
1804 if (urb->iso_frame_desc[i].status == 0)
1805 out_packet->packet_size[i] =
1806 urb->iso_frame_desc[i].actual_length / ep->stride;
1807 else
1808 out_packet->packet_size[i] = 0;
1809 }
1810
1811 ep->next_packet_write_pos++;
1812 ep->next_packet_write_pos %= MAX_URBS;
1813 spin_unlock_irqrestore(&ep->lock, flags);
1814 queue_pending_output_urbs(ep);
1815
1816 return;
1817 }
1818
1819 /* parse sync endpoint packet */
1820
1821 if (urb->iso_frame_desc[0].status != 0 ||
1822 urb->iso_frame_desc[0].actual_length < 3)
1823 return;
1824
1825 f = le32_to_cpup(urb->transfer_buffer);
1826 if (urb->iso_frame_desc[0].actual_length == 3)
1827 f &= 0x00ffffff;
1828 else
1829 f &= 0x0fffffff;
1830
1831 if (f == 0)
1832 return;
1833
1834 if (unlikely(ep->freqshift == INT_MIN)) {
1835 /*
1836 * The first time we see a feedback value, determine its format
1837 * by shifting it left or right until it matches the nominal
1838 * frequency value. This assumes that the feedback does not
1839 * differ from the nominal value more than +50% or -25%.
1840 */
1841 shift = 0;
1842 while (f < ep->freqn - ep->freqn / 4) {
1843 f <<= 1;
1844 shift++;
1845 }
1846 while (f > ep->freqn + ep->freqn / 2) {
1847 f >>= 1;
1848 shift--;
1849 }
1850 ep->freqshift = shift;
1851 } else if (ep->freqshift >= 0)
1852 f <<= ep->freqshift;
1853 else
1854 f >>= -ep->freqshift;
1855
1856 if (likely(f >= ep->freqn - ep->freqn / 8 && f <= ep->freqmax)) {
1857 /*
1858 * If the frequency looks valid, set it.
1859 * This value is referred to in prepare_playback_urb().
1860 */
1861 spin_lock_irqsave(&ep->lock, flags);
1862 ep->freqm = f;
1863 spin_unlock_irqrestore(&ep->lock, flags);
1864 } else {
1865 /*
1866 * Out of range; maybe the shift value is wrong.
1867 * Reset it so that we autodetect again the next time.
1868 */
1869 ep->freqshift = INT_MIN;
1870 }
1871}
1872
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
index 88eb63a636e..9f083d7d6cf 100644
--- a/sound/usb/endpoint.h
+++ b/sound/usb/endpoint.h
@@ -18,4 +18,30 @@ int snd_usb_substream_prepare(struct snd_usb_substream *subs,
18int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd); 18int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd);
19int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd); 19int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd);
20 20
21
22#define SND_USB_ENDPOINT_TYPE_DATA 0
23#define SND_USB_ENDPOINT_TYPE_SYNC 1
24
25struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
26 struct usb_host_interface *alts,
27 int ep_num, int direction, int type);
28
29int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
30 struct snd_pcm_hw_params *hw_params,
31 struct audioformat *fmt,
32 struct snd_usb_endpoint *sync_ep);
33
34int snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
35void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep,
36 int force, int can_sleep, int wait);
37int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
38int snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep);
39void snd_usb_endpoint_free(struct list_head *head);
40
41int snd_usb_endpoint_implict_feedback_sink(struct snd_usb_endpoint *ep);
42
43void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
44 struct snd_usb_endpoint *sender,
45 const struct urb *urb);
46
21#endif /* __USBAUDIO_ENDPOINT_H */ 47#endif /* __USBAUDIO_ENDPOINT_H */
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index a16c21d2d7e..b8233ebe250 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -47,6 +47,7 @@ struct snd_usb_audio {
47 int num_suspended_intf; 47 int num_suspended_intf;
48 48
49 struct list_head pcm_list; /* list of pcm streams */ 49 struct list_head pcm_list; /* list of pcm streams */
50 struct list_head ep_list; /* list of audio-related endpoints */
50 int pcm_devs; 51 int pcm_devs;
51 52
52 struct list_head midi_list; /* list of midi interfaces */ 53 struct list_head midi_list; /* list of midi interfaces */
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-20 08:59:13 -0400