Daniel Mack | e577999 | 2010-03-04 19:46:13 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License as published by |
| 4 | * the Free Software Foundation; either version 2 of the License, or |
| 5 | * (at your option) any later version. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License |
| 13 | * along with this program; if not, write to the Free Software |
| 14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 15 | * |
| 16 | */ |
| 17 | |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 18 | #include <linux/gfp.h> |
| 19 | #include <linux/init.h> |
Takashi Iwai | 80c8a2a | 2012-01-09 11:37:20 +0100 | [diff] [blame] | 20 | #include <linux/ratelimit.h> |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 21 | #include <linux/usb.h> |
| 22 | #include <linux/usb/audio.h> |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 23 | #include <linux/slab.h> |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 24 | |
| 25 | #include <sound/core.h> |
| 26 | #include <sound/pcm.h> |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 27 | #include <sound/pcm_params.h> |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 28 | |
| 29 | #include "usbaudio.h" |
| 30 | #include "helper.h" |
| 31 | #include "card.h" |
| 32 | #include "endpoint.h" |
| 33 | #include "pcm.h" |
Daniel Mack | 2b58fd5 | 2012-09-04 10:23:07 +0200 | [diff] [blame] | 34 | #include "quirks.h" |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 35 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 36 | #define EP_FLAG_RUNNING 1 |
Takashi Iwai | f58161b | 2012-11-08 08:52:45 +0100 | [diff] [blame] | 37 | #define EP_FLAG_STOPPING 2 |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 38 | |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 39 | /* |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 40 | * snd_usb_endpoint is a model that abstracts everything related to an |
| 41 | * USB endpoint and its streaming. |
| 42 | * |
| 43 | * There are functions to activate and deactivate the streaming URBs and |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 44 | * optional callbacks to let the pcm logic handle the actual content of the |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 45 | * packets for playback and record. Thus, the bus streaming and the audio |
| 46 | * handlers are fully decoupled. |
| 47 | * |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 48 | * There are two different types of endpoints in audio applications. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 49 | * |
| 50 | * SND_USB_ENDPOINT_TYPE_DATA handles full audio data payload for both |
| 51 | * inbound and outbound traffic. |
| 52 | * |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 53 | * SND_USB_ENDPOINT_TYPE_SYNC endpoints are for inbound traffic only and |
| 54 | * expect the payload to carry Q10.14 / Q16.16 formatted sync information |
| 55 | * (3 or 4 bytes). |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 56 | * |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 57 | * Each endpoint has to be configured prior to being used by calling |
| 58 | * snd_usb_endpoint_set_params(). |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 59 | * |
| 60 | * The model incorporates a reference counting, so that multiple users |
| 61 | * can call snd_usb_endpoint_start() and snd_usb_endpoint_stop(), and |
| 62 | * only the first user will effectively start the URBs, and only the last |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 63 | * one to stop it will tear the URBs down again. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 64 | */ |
| 65 | |
| 66 | /* |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 67 | * convert a sampling rate into our full speed format (fs/1000 in Q16.16) |
| 68 | * this will overflow at approx 524 kHz |
| 69 | */ |
| 70 | static inline unsigned get_usb_full_speed_rate(unsigned int rate) |
| 71 | { |
| 72 | return ((rate << 13) + 62) / 125; |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * convert a sampling rate into USB high speed format (fs/8000 in Q16.16) |
| 77 | * this will overflow at approx 4 MHz |
| 78 | */ |
| 79 | static inline unsigned get_usb_high_speed_rate(unsigned int rate) |
| 80 | { |
| 81 | return ((rate << 10) + 62) / 125; |
| 82 | } |
| 83 | |
| 84 | /* |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 85 | * release a urb data |
| 86 | */ |
| 87 | static void release_urb_ctx(struct snd_urb_ctx *u) |
| 88 | { |
Daniel Mack | d399ff9 | 2012-04-12 13:51:13 +0200 | [diff] [blame] | 89 | if (u->buffer_size) |
| 90 | usb_free_coherent(u->ep->chip->dev, u->buffer_size, |
| 91 | u->urb->transfer_buffer, |
| 92 | u->urb->transfer_dma); |
| 93 | usb_free_urb(u->urb); |
| 94 | u->urb = NULL; |
Daniel Mack | c731bc9 | 2011-09-14 12:46:57 +0200 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static const char *usb_error_string(int err) |
| 98 | { |
| 99 | switch (err) { |
| 100 | case -ENODEV: |
| 101 | return "no device"; |
| 102 | case -ENOENT: |
| 103 | return "endpoint not enabled"; |
| 104 | case -EPIPE: |
| 105 | return "endpoint stalled"; |
| 106 | case -ENOSPC: |
| 107 | return "not enough bandwidth"; |
| 108 | case -ESHUTDOWN: |
| 109 | return "device disabled"; |
| 110 | case -EHOSTUNREACH: |
| 111 | return "device suspended"; |
| 112 | case -EINVAL: |
| 113 | case -EAGAIN: |
| 114 | case -EFBIG: |
| 115 | case -EMSGSIZE: |
| 116 | return "internal error"; |
| 117 | default: |
| 118 | return "unknown error"; |
| 119 | } |
| 120 | } |
| 121 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 122 | /** |
| 123 | * snd_usb_endpoint_implicit_feedback_sink: Report endpoint usage type |
| 124 | * |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 125 | * @ep: The snd_usb_endpoint |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 126 | * |
| 127 | * Determine whether an endpoint is driven by an implicit feedback |
| 128 | * data endpoint source. |
| 129 | */ |
Eldad Zack | 98ae472 | 2013-04-03 23:18:52 +0200 | [diff] [blame] | 130 | int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 131 | { |
| 132 | return ep->sync_master && |
| 133 | ep->sync_master->type == SND_USB_ENDPOINT_TYPE_DATA && |
| 134 | ep->type == SND_USB_ENDPOINT_TYPE_DATA && |
| 135 | usb_pipeout(ep->pipe); |
| 136 | } |
| 137 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 138 | /* |
| 139 | * For streaming based on information derived from sync endpoints, |
| 140 | * prepare_outbound_urb_sizes() will call next_packet_size() to |
| 141 | * determine the number of samples to be sent in the next packet. |
| 142 | * |
| 143 | * For implicit feedback, next_packet_size() is unused. |
| 144 | */ |
Daniel Mack | 245baf9 | 2012-08-30 18:52:30 +0200 | [diff] [blame] | 145 | int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 146 | { |
| 147 | unsigned long flags; |
| 148 | int ret; |
| 149 | |
| 150 | if (ep->fill_max) |
| 151 | return ep->maxframesize; |
| 152 | |
| 153 | spin_lock_irqsave(&ep->lock, flags); |
| 154 | ep->phase = (ep->phase & 0xffff) |
| 155 | + (ep->freqm << ep->datainterval); |
| 156 | ret = min(ep->phase >> 16, ep->maxframesize); |
| 157 | spin_unlock_irqrestore(&ep->lock, flags); |
| 158 | |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | static void retire_outbound_urb(struct snd_usb_endpoint *ep, |
| 163 | struct snd_urb_ctx *urb_ctx) |
| 164 | { |
| 165 | if (ep->retire_data_urb) |
| 166 | ep->retire_data_urb(ep->data_subs, urb_ctx->urb); |
| 167 | } |
| 168 | |
| 169 | static void retire_inbound_urb(struct snd_usb_endpoint *ep, |
| 170 | struct snd_urb_ctx *urb_ctx) |
| 171 | { |
| 172 | struct urb *urb = urb_ctx->urb; |
| 173 | |
Daniel Mack | 2b58fd5 | 2012-09-04 10:23:07 +0200 | [diff] [blame] | 174 | if (unlikely(ep->skip_packets > 0)) { |
| 175 | ep->skip_packets--; |
| 176 | return; |
| 177 | } |
| 178 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 179 | if (ep->sync_slave) |
| 180 | snd_usb_handle_sync_urb(ep->sync_slave, ep, urb); |
| 181 | |
| 182 | if (ep->retire_data_urb) |
| 183 | ep->retire_data_urb(ep->data_subs, urb); |
| 184 | } |
| 185 | |
Ricard Wanderlof | 5cf310e | 2015-10-19 08:52:51 +0200 | [diff] [blame] | 186 | static void prepare_silent_urb(struct snd_usb_endpoint *ep, |
| 187 | struct snd_urb_ctx *ctx) |
| 188 | { |
| 189 | struct urb *urb = ctx->urb; |
| 190 | unsigned int offs = 0; |
Ricard Wanderlof | e057044 | 2015-10-19 08:52:53 +0200 | [diff] [blame] | 191 | unsigned int extra = 0; |
| 192 | __le32 packet_length; |
Ricard Wanderlof | 5cf310e | 2015-10-19 08:52:51 +0200 | [diff] [blame] | 193 | int i; |
| 194 | |
Ricard Wanderlof | e057044 | 2015-10-19 08:52:53 +0200 | [diff] [blame] | 195 | /* For tx_length_quirk, put packet length at start of packet */ |
| 196 | if (ep->chip->tx_length_quirk) |
| 197 | extra = sizeof(packet_length); |
| 198 | |
Ricard Wanderlof | 5cf310e | 2015-10-19 08:52:51 +0200 | [diff] [blame] | 199 | for (i = 0; i < ctx->packets; ++i) { |
Ricard Wanderlof | e057044 | 2015-10-19 08:52:53 +0200 | [diff] [blame] | 200 | unsigned int offset; |
| 201 | unsigned int length; |
Ricard Wanderlof | 5cf310e | 2015-10-19 08:52:51 +0200 | [diff] [blame] | 202 | int counts; |
| 203 | |
| 204 | if (ctx->packet_size[i]) |
| 205 | counts = ctx->packet_size[i]; |
| 206 | else |
| 207 | counts = snd_usb_endpoint_next_packet_size(ep); |
| 208 | |
Ricard Wanderlof | e057044 | 2015-10-19 08:52:53 +0200 | [diff] [blame] | 209 | length = counts * ep->stride; /* number of silent bytes */ |
| 210 | offset = offs * ep->stride + extra * i; |
| 211 | urb->iso_frame_desc[i].offset = offset; |
| 212 | urb->iso_frame_desc[i].length = length + extra; |
| 213 | if (extra) { |
| 214 | packet_length = cpu_to_le32(length); |
| 215 | memcpy(urb->transfer_buffer + offset, |
| 216 | &packet_length, sizeof(packet_length)); |
| 217 | } |
| 218 | memset(urb->transfer_buffer + offset + extra, |
| 219 | ep->silence_value, length); |
Ricard Wanderlof | 5cf310e | 2015-10-19 08:52:51 +0200 | [diff] [blame] | 220 | offs += counts; |
| 221 | } |
| 222 | |
| 223 | urb->number_of_packets = ctx->packets; |
Ricard Wanderlof | e057044 | 2015-10-19 08:52:53 +0200 | [diff] [blame] | 224 | urb->transfer_buffer_length = offs * ep->stride + ctx->packets * extra; |
Ricard Wanderlof | 5cf310e | 2015-10-19 08:52:51 +0200 | [diff] [blame] | 225 | } |
| 226 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 227 | /* |
| 228 | * Prepare a PLAYBACK urb for submission to the bus. |
| 229 | */ |
| 230 | static void prepare_outbound_urb(struct snd_usb_endpoint *ep, |
| 231 | struct snd_urb_ctx *ctx) |
| 232 | { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 233 | struct urb *urb = ctx->urb; |
| 234 | unsigned char *cp = urb->transfer_buffer; |
| 235 | |
| 236 | urb->dev = ep->chip->dev; /* we need to set this at each time */ |
| 237 | |
| 238 | switch (ep->type) { |
| 239 | case SND_USB_ENDPOINT_TYPE_DATA: |
| 240 | if (ep->prepare_data_urb) { |
| 241 | ep->prepare_data_urb(ep->data_subs, urb); |
| 242 | } else { |
| 243 | /* no data provider, so send silence */ |
Ricard Wanderlof | 5cf310e | 2015-10-19 08:52:51 +0200 | [diff] [blame] | 244 | prepare_silent_urb(ep, ctx); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 245 | } |
| 246 | break; |
| 247 | |
| 248 | case SND_USB_ENDPOINT_TYPE_SYNC: |
| 249 | if (snd_usb_get_speed(ep->chip->dev) >= USB_SPEED_HIGH) { |
| 250 | /* |
| 251 | * fill the length and offset of each urb descriptor. |
| 252 | * the fixed 12.13 frequency is passed as 16.16 through the pipe. |
| 253 | */ |
| 254 | urb->iso_frame_desc[0].length = 4; |
| 255 | urb->iso_frame_desc[0].offset = 0; |
| 256 | cp[0] = ep->freqn; |
| 257 | cp[1] = ep->freqn >> 8; |
| 258 | cp[2] = ep->freqn >> 16; |
| 259 | cp[3] = ep->freqn >> 24; |
| 260 | } else { |
| 261 | /* |
| 262 | * fill the length and offset of each urb descriptor. |
| 263 | * the fixed 10.14 frequency is passed through the pipe. |
| 264 | */ |
| 265 | urb->iso_frame_desc[0].length = 3; |
| 266 | urb->iso_frame_desc[0].offset = 0; |
| 267 | cp[0] = ep->freqn >> 2; |
| 268 | cp[1] = ep->freqn >> 10; |
| 269 | cp[2] = ep->freqn >> 18; |
| 270 | } |
| 271 | |
| 272 | break; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * Prepare a CAPTURE or SYNC urb for submission to the bus. |
| 278 | */ |
| 279 | static inline void prepare_inbound_urb(struct snd_usb_endpoint *ep, |
| 280 | struct snd_urb_ctx *urb_ctx) |
| 281 | { |
| 282 | int i, offs; |
| 283 | struct urb *urb = urb_ctx->urb; |
| 284 | |
| 285 | urb->dev = ep->chip->dev; /* we need to set this at each time */ |
| 286 | |
| 287 | switch (ep->type) { |
| 288 | case SND_USB_ENDPOINT_TYPE_DATA: |
| 289 | offs = 0; |
| 290 | for (i = 0; i < urb_ctx->packets; i++) { |
| 291 | urb->iso_frame_desc[i].offset = offs; |
| 292 | urb->iso_frame_desc[i].length = ep->curpacksize; |
| 293 | offs += ep->curpacksize; |
| 294 | } |
| 295 | |
| 296 | urb->transfer_buffer_length = offs; |
| 297 | urb->number_of_packets = urb_ctx->packets; |
| 298 | break; |
| 299 | |
| 300 | case SND_USB_ENDPOINT_TYPE_SYNC: |
| 301 | urb->iso_frame_desc[0].length = min(4u, ep->syncmaxsize); |
| 302 | urb->iso_frame_desc[0].offset = 0; |
| 303 | break; |
| 304 | } |
| 305 | } |
| 306 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 307 | /* |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 308 | * Send output urbs that have been prepared previously. URBs are dequeued |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 309 | * from ep->ready_playback_urbs and in case there there aren't any available |
| 310 | * or there are no packets that have been prepared, this function does |
| 311 | * nothing. |
| 312 | * |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 313 | * The reason why the functionality of sending and preparing URBs is separated |
| 314 | * is that host controllers don't guarantee the order in which they return |
| 315 | * inbound and outbound packets to their submitters. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 316 | * |
| 317 | * This function is only used for implicit feedback endpoints. For endpoints |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 318 | * driven by dedicated sync endpoints, URBs are immediately re-submitted |
| 319 | * from their completion handler. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 320 | */ |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 321 | static void queue_pending_output_urbs(struct snd_usb_endpoint *ep) |
| 322 | { |
| 323 | while (test_bit(EP_FLAG_RUNNING, &ep->flags)) { |
| 324 | |
| 325 | unsigned long flags; |
Andrew Morton | 68853fa | 2012-04-24 08:10:10 +0200 | [diff] [blame] | 326 | struct snd_usb_packet_info *uninitialized_var(packet); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 327 | struct snd_urb_ctx *ctx = NULL; |
| 328 | struct urb *urb; |
| 329 | int err, i; |
| 330 | |
| 331 | spin_lock_irqsave(&ep->lock, flags); |
| 332 | if (ep->next_packet_read_pos != ep->next_packet_write_pos) { |
| 333 | packet = ep->next_packet + ep->next_packet_read_pos; |
| 334 | ep->next_packet_read_pos++; |
| 335 | ep->next_packet_read_pos %= MAX_URBS; |
| 336 | |
| 337 | /* take URB out of FIFO */ |
| 338 | if (!list_empty(&ep->ready_playback_urbs)) |
| 339 | ctx = list_first_entry(&ep->ready_playback_urbs, |
| 340 | struct snd_urb_ctx, ready_list); |
| 341 | } |
| 342 | spin_unlock_irqrestore(&ep->lock, flags); |
| 343 | |
| 344 | if (ctx == NULL) |
| 345 | return; |
| 346 | |
| 347 | list_del_init(&ctx->ready_list); |
| 348 | urb = ctx->urb; |
| 349 | |
| 350 | /* copy over the length information */ |
| 351 | for (i = 0; i < packet->packets; i++) |
| 352 | ctx->packet_size[i] = packet->packet_size[i]; |
| 353 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 354 | /* call the data handler to fill in playback data */ |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 355 | prepare_outbound_urb(ep, ctx); |
| 356 | |
| 357 | err = usb_submit_urb(ctx->urb, GFP_ATOMIC); |
| 358 | if (err < 0) |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 359 | usb_audio_err(ep->chip, |
Vamsi Krishna Samavedam | 0836aae | 2016-11-03 17:21:02 -0700 | [diff] [blame] | 360 | "Unable to submit urb #%d: %d (urb %pK)\n", |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 361 | ctx->index, err, ctx->urb); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 362 | else |
| 363 | set_bit(ctx->index, &ep->active_mask); |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | /* |
| 368 | * complete callback for urbs |
| 369 | */ |
| 370 | static void snd_complete_urb(struct urb *urb) |
| 371 | { |
| 372 | struct snd_urb_ctx *ctx = urb->context; |
| 373 | struct snd_usb_endpoint *ep = ctx->ep; |
Takashi Iwai | 67e2250 | 2014-11-06 13:04:49 +0100 | [diff] [blame] | 374 | struct snd_pcm_substream *substream; |
| 375 | unsigned long flags; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 376 | int err; |
| 377 | |
| 378 | if (unlikely(urb->status == -ENOENT || /* unlinked */ |
| 379 | urb->status == -ENODEV || /* device removed */ |
| 380 | urb->status == -ECONNRESET || /* unlinked */ |
Takashi Iwai | 47ab154 | 2015-08-25 16:09:00 +0200 | [diff] [blame] | 381 | urb->status == -ESHUTDOWN)) /* device disabled */ |
| 382 | goto exit_clear; |
| 383 | /* device disconnected */ |
| 384 | if (unlikely(atomic_read(&ep->chip->shutdown))) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 385 | goto exit_clear; |
| 386 | |
Ioan-Adrian Ratiu | 12dac5f | 2017-01-05 00:37:47 +0200 | [diff] [blame] | 387 | if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags))) |
| 388 | goto exit_clear; |
| 389 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 390 | if (usb_pipeout(ep->pipe)) { |
| 391 | retire_outbound_urb(ep, ctx); |
| 392 | /* can be stopped during retire callback */ |
| 393 | if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags))) |
| 394 | goto exit_clear; |
| 395 | |
Eldad Zack | 98ae472 | 2013-04-03 23:18:52 +0200 | [diff] [blame] | 396 | if (snd_usb_endpoint_implicit_feedback_sink(ep)) { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 397 | spin_lock_irqsave(&ep->lock, flags); |
| 398 | list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs); |
| 399 | spin_unlock_irqrestore(&ep->lock, flags); |
| 400 | queue_pending_output_urbs(ep); |
| 401 | |
| 402 | goto exit_clear; |
| 403 | } |
| 404 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 405 | prepare_outbound_urb(ep, ctx); |
| 406 | } else { |
| 407 | retire_inbound_urb(ep, ctx); |
| 408 | /* can be stopped during retire callback */ |
| 409 | if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags))) |
| 410 | goto exit_clear; |
| 411 | |
| 412 | prepare_inbound_urb(ep, ctx); |
| 413 | } |
| 414 | |
| 415 | err = usb_submit_urb(urb, GFP_ATOMIC); |
| 416 | if (err == 0) |
| 417 | return; |
| 418 | |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 419 | usb_audio_err(ep->chip, "cannot submit urb (err = %d)\n", err); |
Takashi Iwai | 67e2250 | 2014-11-06 13:04:49 +0100 | [diff] [blame] | 420 | if (ep->data_subs && ep->data_subs->pcm_substream) { |
| 421 | substream = ep->data_subs->pcm_substream; |
Takashi Iwai | 1fb8510 | 2014-11-07 17:08:28 +0100 | [diff] [blame] | 422 | snd_pcm_stop_xrun(substream); |
Takashi Iwai | 67e2250 | 2014-11-06 13:04:49 +0100 | [diff] [blame] | 423 | } |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 424 | |
| 425 | exit_clear: |
| 426 | clear_bit(ctx->index, &ep->active_mask); |
| 427 | } |
| 428 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 429 | /** |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 430 | * snd_usb_add_endpoint: Add an endpoint to an USB audio chip |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 431 | * |
| 432 | * @chip: The chip |
| 433 | * @alts: The USB host interface |
| 434 | * @ep_num: The number of the endpoint to use |
| 435 | * @direction: SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE |
| 436 | * @type: SND_USB_ENDPOINT_TYPE_DATA or SND_USB_ENDPOINT_TYPE_SYNC |
| 437 | * |
| 438 | * If the requested endpoint has not been added to the given chip before, |
| 439 | * a new instance is created. Otherwise, a pointer to the previoulsy |
| 440 | * created instance is returned. In case of any error, NULL is returned. |
| 441 | * |
| 442 | * New endpoints will be added to chip->ep_list and must be freed by |
| 443 | * calling snd_usb_endpoint_free(). |
Takashi Iwai | 447d627 | 2016-03-15 15:20:58 +0100 | [diff] [blame] | 444 | * |
| 445 | * For SND_USB_ENDPOINT_TYPE_SYNC, the caller needs to guarantee that |
| 446 | * bNumEndpoints > 1 beforehand. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 447 | */ |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 448 | struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip, |
| 449 | struct usb_host_interface *alts, |
| 450 | int ep_num, int direction, int type) |
| 451 | { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 452 | struct snd_usb_endpoint *ep; |
Daniel Mack | 68e67f4 | 2012-07-12 13:08:40 +0200 | [diff] [blame] | 453 | int is_playback = direction == SNDRV_PCM_STREAM_PLAYBACK; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 454 | |
Eldad Zack | e7e58df | 2013-08-03 10:51:15 +0200 | [diff] [blame] | 455 | if (WARN_ON(!alts)) |
| 456 | return NULL; |
| 457 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 458 | mutex_lock(&chip->mutex); |
| 459 | |
Eldad Zack | 88766f0 | 2013-04-03 23:18:49 +0200 | [diff] [blame] | 460 | list_for_each_entry(ep, &chip->ep_list, list) { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 461 | if (ep->ep_num == ep_num && |
| 462 | ep->iface == alts->desc.bInterfaceNumber && |
Eldad Zack | df23a24 | 2013-10-06 22:31:13 +0200 | [diff] [blame] | 463 | ep->altsetting == alts->desc.bAlternateSetting) { |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 464 | usb_audio_dbg(ep->chip, |
Vamsi Krishna Samavedam | 0836aae | 2016-11-03 17:21:02 -0700 | [diff] [blame] | 465 | "Re-using EP %x in iface %d,%d @%pK\n", |
Eldad Zack | df23a24 | 2013-10-06 22:31:13 +0200 | [diff] [blame] | 466 | ep_num, ep->iface, ep->altsetting, ep); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 467 | goto __exit_unlock; |
| 468 | } |
| 469 | } |
| 470 | |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 471 | usb_audio_dbg(chip, "Creating new %s %s endpoint #%x\n", |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 472 | is_playback ? "playback" : "capture", |
| 473 | type == SND_USB_ENDPOINT_TYPE_DATA ? "data" : "sync", |
| 474 | ep_num); |
| 475 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 476 | ep = kzalloc(sizeof(*ep), GFP_KERNEL); |
| 477 | if (!ep) |
| 478 | goto __exit_unlock; |
| 479 | |
| 480 | ep->chip = chip; |
| 481 | spin_lock_init(&ep->lock); |
| 482 | ep->type = type; |
| 483 | ep->ep_num = ep_num; |
| 484 | ep->iface = alts->desc.bInterfaceNumber; |
Eldad Zack | df23a24 | 2013-10-06 22:31:13 +0200 | [diff] [blame] | 485 | ep->altsetting = alts->desc.bAlternateSetting; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 486 | INIT_LIST_HEAD(&ep->ready_playback_urbs); |
| 487 | ep_num &= USB_ENDPOINT_NUMBER_MASK; |
| 488 | |
| 489 | if (is_playback) |
| 490 | ep->pipe = usb_sndisocpipe(chip->dev, ep_num); |
| 491 | else |
| 492 | ep->pipe = usb_rcvisocpipe(chip->dev, ep_num); |
| 493 | |
| 494 | if (type == SND_USB_ENDPOINT_TYPE_SYNC) { |
| 495 | if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
| 496 | get_endpoint(alts, 1)->bRefresh >= 1 && |
| 497 | get_endpoint(alts, 1)->bRefresh <= 9) |
| 498 | ep->syncinterval = get_endpoint(alts, 1)->bRefresh; |
| 499 | else if (snd_usb_get_speed(chip->dev) == USB_SPEED_FULL) |
| 500 | ep->syncinterval = 1; |
| 501 | else if (get_endpoint(alts, 1)->bInterval >= 1 && |
| 502 | get_endpoint(alts, 1)->bInterval <= 16) |
| 503 | ep->syncinterval = get_endpoint(alts, 1)->bInterval - 1; |
| 504 | else |
| 505 | ep->syncinterval = 3; |
| 506 | |
| 507 | ep->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize); |
| 508 | } |
| 509 | |
| 510 | list_add_tail(&ep->list, &chip->ep_list); |
| 511 | |
| 512 | __exit_unlock: |
| 513 | mutex_unlock(&chip->mutex); |
| 514 | |
| 515 | return ep; |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | * wait until all urbs are processed. |
| 520 | */ |
| 521 | static int wait_clear_urbs(struct snd_usb_endpoint *ep) |
| 522 | { |
| 523 | unsigned long end_time = jiffies + msecs_to_jiffies(1000); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 524 | int alive; |
| 525 | |
| 526 | do { |
Joe Perches | 190006f | 2012-11-16 23:35:16 -0800 | [diff] [blame] | 527 | alive = bitmap_weight(&ep->active_mask, ep->nurbs); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 528 | if (!alive) |
| 529 | break; |
| 530 | |
| 531 | schedule_timeout_uninterruptible(1); |
| 532 | } while (time_before(jiffies, end_time)); |
| 533 | |
| 534 | if (alive) |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 535 | usb_audio_err(ep->chip, |
| 536 | "timeout: still %d active urbs on EP #%x\n", |
| 537 | alive, ep->ep_num); |
Takashi Iwai | f58161b | 2012-11-08 08:52:45 +0100 | [diff] [blame] | 538 | clear_bit(EP_FLAG_STOPPING, &ep->flags); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 539 | |
Ioan-Adrian Ratiu | be4e3ae | 2017-01-05 00:37:46 +0200 | [diff] [blame] | 540 | ep->data_subs = NULL; |
| 541 | ep->sync_slave = NULL; |
| 542 | ep->retire_data_urb = NULL; |
| 543 | ep->prepare_data_urb = NULL; |
| 544 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 545 | return 0; |
| 546 | } |
| 547 | |
Takashi Iwai | f58161b | 2012-11-08 08:52:45 +0100 | [diff] [blame] | 548 | /* sync the pending stop operation; |
| 549 | * this function itself doesn't trigger the stop operation |
| 550 | */ |
| 551 | void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep) |
| 552 | { |
| 553 | if (ep && test_bit(EP_FLAG_STOPPING, &ep->flags)) |
| 554 | wait_clear_urbs(ep); |
| 555 | } |
| 556 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 557 | /* |
| 558 | * unlink active urbs. |
| 559 | */ |
Takashi Iwai | ccc1696 | 2012-11-21 08:22:52 +0100 | [diff] [blame] | 560 | static int deactivate_urbs(struct snd_usb_endpoint *ep, bool force) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 561 | { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 562 | unsigned int i; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 563 | |
Takashi Iwai | 47ab154 | 2015-08-25 16:09:00 +0200 | [diff] [blame] | 564 | if (!force && atomic_read(&ep->chip->shutdown)) /* to be sure... */ |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 565 | return -EBADFD; |
| 566 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 567 | clear_bit(EP_FLAG_RUNNING, &ep->flags); |
| 568 | |
| 569 | INIT_LIST_HEAD(&ep->ready_playback_urbs); |
| 570 | ep->next_packet_read_pos = 0; |
| 571 | ep->next_packet_write_pos = 0; |
| 572 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 573 | for (i = 0; i < ep->nurbs; i++) { |
| 574 | if (test_bit(i, &ep->active_mask)) { |
| 575 | if (!test_and_set_bit(i, &ep->unlink_mask)) { |
| 576 | struct urb *u = ep->urb[i].urb; |
Takashi Iwai | ccc1696 | 2012-11-21 08:22:52 +0100 | [diff] [blame] | 577 | usb_unlink_urb(u); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 578 | } |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | return 0; |
| 583 | } |
| 584 | |
| 585 | /* |
| 586 | * release an endpoint's urbs |
| 587 | */ |
| 588 | static void release_urbs(struct snd_usb_endpoint *ep, int force) |
| 589 | { |
| 590 | int i; |
| 591 | |
| 592 | /* route incoming urbs to nirvana */ |
| 593 | ep->retire_data_urb = NULL; |
| 594 | ep->prepare_data_urb = NULL; |
| 595 | |
| 596 | /* stop urbs */ |
Takashi Iwai | ccc1696 | 2012-11-21 08:22:52 +0100 | [diff] [blame] | 597 | deactivate_urbs(ep, force); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 598 | wait_clear_urbs(ep); |
| 599 | |
| 600 | for (i = 0; i < ep->nurbs; i++) |
| 601 | release_urb_ctx(&ep->urb[i]); |
| 602 | |
| 603 | if (ep->syncbuf) |
| 604 | usb_free_coherent(ep->chip->dev, SYNC_URBS * 4, |
| 605 | ep->syncbuf, ep->sync_dma); |
| 606 | |
| 607 | ep->syncbuf = NULL; |
| 608 | ep->nurbs = 0; |
| 609 | } |
| 610 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 611 | /* |
| 612 | * configure a data endpoint |
| 613 | */ |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 614 | static int data_ep_set_params(struct snd_usb_endpoint *ep, |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 615 | snd_pcm_format_t pcm_format, |
| 616 | unsigned int channels, |
| 617 | unsigned int period_bytes, |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 618 | unsigned int frames_per_period, |
| 619 | unsigned int periods_per_buffer, |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 620 | struct audioformat *fmt, |
| 621 | struct snd_usb_endpoint *sync_ep) |
| 622 | { |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 623 | unsigned int maxsize, minsize, packs_per_ms, max_packs_per_urb; |
| 624 | unsigned int max_packs_per_period, urbs_per_period, urb_packs; |
| 625 | unsigned int max_urbs, i; |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 626 | int frame_bits = snd_pcm_format_physical_width(pcm_format) * channels; |
Ricard Wanderlof | 759c90f | 2015-10-19 08:52:54 +0200 | [diff] [blame] | 627 | int tx_length_quirk = (ep->chip->tx_length_quirk && |
| 628 | usb_pipeout(ep->pipe)); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 629 | |
Daniel Mack | d24f506 | 2013-04-17 00:01:38 +0800 | [diff] [blame] | 630 | if (pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && fmt->dsd_dop) { |
| 631 | /* |
| 632 | * When operating in DSD DOP mode, the size of a sample frame |
| 633 | * in hardware differs from the actual physical format width |
| 634 | * because we need to make room for the DOP markers. |
| 635 | */ |
| 636 | frame_bits += channels << 3; |
| 637 | } |
| 638 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 639 | ep->datainterval = fmt->datainterval; |
| 640 | ep->stride = frame_bits >> 3; |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 641 | ep->silence_value = pcm_format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 642 | |
Clemens Ladisch | 57e6dae | 2013-08-08 11:24:55 +0200 | [diff] [blame] | 643 | /* assume max. frequency is 25% higher than nominal */ |
| 644 | ep->freqmax = ep->freqn + (ep->freqn >> 2); |
Ricard Wanderlof | ab30965 | 2015-10-11 20:54:51 +0200 | [diff] [blame] | 645 | /* Round up freqmax to nearest integer in order to calculate maximum |
| 646 | * packet size, which must represent a whole number of frames. |
| 647 | * This is accomplished by adding 0x0.ffff before converting the |
| 648 | * Q16.16 format into integer. |
| 649 | * In order to accurately calculate the maximum packet size when |
| 650 | * the data interval is more than 1 (i.e. ep->datainterval > 0), |
| 651 | * multiply by the data interval prior to rounding. For instance, |
| 652 | * a freqmax of 41 kHz will result in a max packet size of 6 (5.125) |
| 653 | * frames with a data interval of 1, but 11 (10.25) frames with a |
| 654 | * data interval of 2. |
| 655 | * (ep->freqmax << ep->datainterval overflows at 8.192 MHz for the |
| 656 | * maximum datainterval value of 3, at USB full speed, higher for |
| 657 | * USB high speed, noting that ep->freqmax is in units of |
| 658 | * frames per packet in Q16.16 format.) |
| 659 | */ |
| 660 | maxsize = (((ep->freqmax << ep->datainterval) + 0xffff) >> 16) * |
| 661 | (frame_bits >> 3); |
Ricard Wanderlof | 759c90f | 2015-10-19 08:52:54 +0200 | [diff] [blame] | 662 | if (tx_length_quirk) |
| 663 | maxsize += sizeof(__le32); /* Space for length descriptor */ |
Clemens Ladisch | 57e6dae | 2013-08-08 11:24:55 +0200 | [diff] [blame] | 664 | /* but wMaxPacketSize might reduce this */ |
| 665 | if (ep->maxpacksize && ep->maxpacksize < maxsize) { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 666 | /* whatever fits into a max. size packet */ |
Ricard Wanderlof | 759c90f | 2015-10-19 08:52:54 +0200 | [diff] [blame] | 667 | unsigned int data_maxsize = maxsize = ep->maxpacksize; |
| 668 | |
| 669 | if (tx_length_quirk) |
| 670 | /* Need to remove the length descriptor to calc freq */ |
| 671 | data_maxsize -= sizeof(__le32); |
| 672 | ep->freqmax = (data_maxsize / (frame_bits >> 3)) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 673 | << (16 - ep->datainterval); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | if (ep->fill_max) |
| 677 | ep->curpacksize = ep->maxpacksize; |
| 678 | else |
| 679 | ep->curpacksize = maxsize; |
| 680 | |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 681 | if (snd_usb_get_speed(ep->chip->dev) != USB_SPEED_FULL) { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 682 | packs_per_ms = 8 >> ep->datainterval; |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 683 | max_packs_per_urb = MAX_PACKS_HS; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 684 | } else { |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 685 | packs_per_ms = 1; |
| 686 | max_packs_per_urb = MAX_PACKS; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 687 | } |
Eldad Zack | 98ae472 | 2013-04-03 23:18:52 +0200 | [diff] [blame] | 688 | if (sync_ep && !snd_usb_endpoint_implicit_feedback_sink(ep)) |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 689 | max_packs_per_urb = min(max_packs_per_urb, |
| 690 | 1U << sync_ep->syncinterval); |
| 691 | max_packs_per_urb = max(1u, max_packs_per_urb >> ep->datainterval); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 692 | |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 693 | /* |
| 694 | * Capture endpoints need to use small URBs because there's no way |
| 695 | * to tell in advance where the next period will end, and we don't |
| 696 | * want the next URB to complete much after the period ends. |
| 697 | * |
| 698 | * Playback endpoints with implicit sync much use the same parameters |
| 699 | * as their corresponding capture endpoint. |
| 700 | */ |
| 701 | if (usb_pipein(ep->pipe) || |
| 702 | snd_usb_endpoint_implicit_feedback_sink(ep)) { |
| 703 | |
Thomas Pugliese | a93455e | 2013-11-26 13:58:15 -0600 | [diff] [blame] | 704 | urb_packs = packs_per_ms; |
| 705 | /* |
| 706 | * Wireless devices can poll at a max rate of once per 4ms. |
| 707 | * For dataintervals less than 5, increase the packet count to |
| 708 | * allow the host controller to use bursting to fill in the |
| 709 | * gaps. |
| 710 | */ |
| 711 | if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_WIRELESS) { |
| 712 | int interval = ep->datainterval; |
| 713 | while (interval < 5) { |
| 714 | urb_packs <<= 1; |
| 715 | ++interval; |
| 716 | } |
| 717 | } |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 718 | /* make capture URBs <= 1 ms and smaller than a period */ |
Thomas Pugliese | a93455e | 2013-11-26 13:58:15 -0600 | [diff] [blame] | 719 | urb_packs = min(max_packs_per_urb, urb_packs); |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 720 | while (urb_packs > 1 && urb_packs * maxsize >= period_bytes) |
| 721 | urb_packs >>= 1; |
| 722 | ep->nurbs = MAX_URBS; |
| 723 | |
| 724 | /* |
| 725 | * Playback endpoints without implicit sync are adjusted so that |
| 726 | * a period fits as evenly as possible in the smallest number of |
| 727 | * URBs. The total number of URBs is adjusted to the size of the |
| 728 | * ALSA buffer, subject to the MAX_URBS and MAX_QUEUE limits. |
| 729 | */ |
| 730 | } else { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 731 | /* determine how small a packet can be */ |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 732 | minsize = (ep->freqn >> (16 - ep->datainterval)) * |
| 733 | (frame_bits >> 3); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 734 | /* with sync from device, assume it can be 12% lower */ |
| 735 | if (sync_ep) |
| 736 | minsize -= minsize >> 3; |
| 737 | minsize = max(minsize, 1u); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 738 | |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 739 | /* how many packets will contain an entire ALSA period? */ |
| 740 | max_packs_per_period = DIV_ROUND_UP(period_bytes, minsize); |
| 741 | |
| 742 | /* how many URBs will contain a period? */ |
| 743 | urbs_per_period = DIV_ROUND_UP(max_packs_per_period, |
| 744 | max_packs_per_urb); |
| 745 | /* how many packets are needed in each URB? */ |
| 746 | urb_packs = DIV_ROUND_UP(max_packs_per_period, urbs_per_period); |
| 747 | |
| 748 | /* limit the number of frames in a single URB */ |
| 749 | ep->max_urb_frames = DIV_ROUND_UP(frames_per_period, |
| 750 | urbs_per_period); |
| 751 | |
| 752 | /* try to use enough URBs to contain an entire ALSA buffer */ |
| 753 | max_urbs = min((unsigned) MAX_URBS, |
| 754 | MAX_QUEUE * packs_per_ms / urb_packs); |
| 755 | ep->nurbs = min(max_urbs, urbs_per_period * periods_per_buffer); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | /* allocate and initialize data urbs */ |
| 759 | for (i = 0; i < ep->nurbs; i++) { |
| 760 | struct snd_urb_ctx *u = &ep->urb[i]; |
| 761 | u->index = i; |
| 762 | u->ep = ep; |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 763 | u->packets = urb_packs; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 764 | u->buffer_size = maxsize * u->packets; |
| 765 | |
| 766 | if (fmt->fmt_type == UAC_FORMAT_TYPE_II) |
| 767 | u->packets++; /* for transfer delimiter */ |
| 768 | u->urb = usb_alloc_urb(u->packets, GFP_KERNEL); |
| 769 | if (!u->urb) |
| 770 | goto out_of_memory; |
| 771 | |
| 772 | u->urb->transfer_buffer = |
| 773 | usb_alloc_coherent(ep->chip->dev, u->buffer_size, |
| 774 | GFP_KERNEL, &u->urb->transfer_dma); |
| 775 | if (!u->urb->transfer_buffer) |
| 776 | goto out_of_memory; |
| 777 | u->urb->pipe = ep->pipe; |
Clemens Ladisch | c75c5ab | 2013-04-27 12:10:32 +0200 | [diff] [blame] | 778 | u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 779 | u->urb->interval = 1 << ep->datainterval; |
| 780 | u->urb->context = u; |
| 781 | u->urb->complete = snd_complete_urb; |
| 782 | INIT_LIST_HEAD(&u->ready_list); |
| 783 | } |
| 784 | |
| 785 | return 0; |
| 786 | |
| 787 | out_of_memory: |
| 788 | release_urbs(ep, 0); |
| 789 | return -ENOMEM; |
| 790 | } |
| 791 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 792 | /* |
| 793 | * configure a sync endpoint |
| 794 | */ |
Eldad Zack | 9372103 | 2013-10-06 22:31:06 +0200 | [diff] [blame] | 795 | static int sync_ep_set_params(struct snd_usb_endpoint *ep) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 796 | { |
| 797 | int i; |
| 798 | |
| 799 | ep->syncbuf = usb_alloc_coherent(ep->chip->dev, SYNC_URBS * 4, |
| 800 | GFP_KERNEL, &ep->sync_dma); |
| 801 | if (!ep->syncbuf) |
| 802 | return -ENOMEM; |
| 803 | |
| 804 | for (i = 0; i < SYNC_URBS; i++) { |
| 805 | struct snd_urb_ctx *u = &ep->urb[i]; |
| 806 | u->index = i; |
| 807 | u->ep = ep; |
| 808 | u->packets = 1; |
| 809 | u->urb = usb_alloc_urb(1, GFP_KERNEL); |
| 810 | if (!u->urb) |
| 811 | goto out_of_memory; |
| 812 | u->urb->transfer_buffer = ep->syncbuf + i * 4; |
| 813 | u->urb->transfer_dma = ep->sync_dma + i * 4; |
| 814 | u->urb->transfer_buffer_length = 4; |
| 815 | u->urb->pipe = ep->pipe; |
Clemens Ladisch | c75c5ab | 2013-04-27 12:10:32 +0200 | [diff] [blame] | 816 | u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 817 | u->urb->number_of_packets = 1; |
| 818 | u->urb->interval = 1 << ep->syncinterval; |
| 819 | u->urb->context = u; |
| 820 | u->urb->complete = snd_complete_urb; |
| 821 | } |
| 822 | |
| 823 | ep->nurbs = SYNC_URBS; |
| 824 | |
| 825 | return 0; |
| 826 | |
| 827 | out_of_memory: |
| 828 | release_urbs(ep, 0); |
| 829 | return -ENOMEM; |
| 830 | } |
| 831 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 832 | /** |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 833 | * snd_usb_endpoint_set_params: configure an snd_usb_endpoint |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 834 | * |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 835 | * @ep: the snd_usb_endpoint to configure |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 836 | * @pcm_format: the audio fomat. |
| 837 | * @channels: the number of audio channels. |
| 838 | * @period_bytes: the number of bytes in one alsa period. |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 839 | * @period_frames: the number of frames in one alsa period. |
| 840 | * @buffer_periods: the number of periods in one alsa buffer. |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 841 | * @rate: the frame rate. |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 842 | * @fmt: the USB audio format information |
| 843 | * @sync_ep: the sync endpoint to use, if any |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 844 | * |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 845 | * Determine the number of URBs to be used on this endpoint. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 846 | * An endpoint must be configured before it can be started. |
| 847 | * An endpoint that is already running can not be reconfigured. |
| 848 | */ |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 849 | int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep, |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 850 | snd_pcm_format_t pcm_format, |
| 851 | unsigned int channels, |
| 852 | unsigned int period_bytes, |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 853 | unsigned int period_frames, |
| 854 | unsigned int buffer_periods, |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 855 | unsigned int rate, |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 856 | struct audioformat *fmt, |
| 857 | struct snd_usb_endpoint *sync_ep) |
| 858 | { |
| 859 | int err; |
| 860 | |
| 861 | if (ep->use_count != 0) { |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 862 | usb_audio_warn(ep->chip, |
| 863 | "Unable to change format on ep #%x: already in use\n", |
| 864 | ep->ep_num); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 865 | return -EBUSY; |
| 866 | } |
| 867 | |
| 868 | /* release old buffers, if any */ |
| 869 | release_urbs(ep, 0); |
| 870 | |
| 871 | ep->datainterval = fmt->datainterval; |
| 872 | ep->maxpacksize = fmt->maxpacksize; |
Takashi Iwai | 85f7193 | 2012-04-13 12:41:54 +0200 | [diff] [blame] | 873 | ep->fill_max = !!(fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 874 | |
| 875 | if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL) |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 876 | ep->freqn = get_usb_full_speed_rate(rate); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 877 | else |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 878 | ep->freqn = get_usb_high_speed_rate(rate); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 879 | |
| 880 | /* calculate the frequency in 16.16 format */ |
| 881 | ep->freqm = ep->freqn; |
| 882 | ep->freqshift = INT_MIN; |
| 883 | |
| 884 | ep->phase = 0; |
| 885 | |
| 886 | switch (ep->type) { |
| 887 | case SND_USB_ENDPOINT_TYPE_DATA: |
Dylan Reid | 35ec7aa2 | 2012-09-18 09:49:47 -0700 | [diff] [blame] | 888 | err = data_ep_set_params(ep, pcm_format, channels, |
Alan Stern | 976b6c0 | 2013-09-24 15:51:58 -0400 | [diff] [blame] | 889 | period_bytes, period_frames, |
| 890 | buffer_periods, fmt, sync_ep); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 891 | break; |
| 892 | case SND_USB_ENDPOINT_TYPE_SYNC: |
Eldad Zack | 9372103 | 2013-10-06 22:31:06 +0200 | [diff] [blame] | 893 | err = sync_ep_set_params(ep); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 894 | break; |
| 895 | default: |
| 896 | err = -EINVAL; |
| 897 | } |
| 898 | |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 899 | usb_audio_dbg(ep->chip, |
| 900 | "Setting params for ep #%x (type %d, %d urbs), ret=%d\n", |
| 901 | ep->ep_num, ep->type, ep->nurbs, err); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 902 | |
| 903 | return err; |
| 904 | } |
| 905 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 906 | /** |
| 907 | * snd_usb_endpoint_start: start an snd_usb_endpoint |
| 908 | * |
Ioan-Adrian Ratiu | be4e3ae | 2017-01-05 00:37:46 +0200 | [diff] [blame] | 909 | * @ep: the endpoint to start |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 910 | * |
| 911 | * A call to this function will increment the use count of the endpoint. |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 912 | * In case it is not already running, the URBs for this endpoint will be |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 913 | * submitted. Otherwise, this function does nothing. |
| 914 | * |
| 915 | * Must be balanced to calls of snd_usb_endpoint_stop(). |
| 916 | * |
| 917 | * Returns an error if the URB submission failed, 0 in all other cases. |
| 918 | */ |
Ioan-Adrian Ratiu | be4e3ae | 2017-01-05 00:37:46 +0200 | [diff] [blame] | 919 | int snd_usb_endpoint_start(struct snd_usb_endpoint *ep) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 920 | { |
| 921 | int err; |
| 922 | unsigned int i; |
| 923 | |
Takashi Iwai | 47ab154 | 2015-08-25 16:09:00 +0200 | [diff] [blame] | 924 | if (atomic_read(&ep->chip->shutdown)) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 925 | return -EBADFD; |
| 926 | |
| 927 | /* already running? */ |
| 928 | if (++ep->use_count != 1) |
| 929 | return 0; |
| 930 | |
Daniel Mack | 015618b | 2012-08-29 13:17:05 +0200 | [diff] [blame] | 931 | /* just to be sure */ |
Takashi Iwai | ccc1696 | 2012-11-21 08:22:52 +0100 | [diff] [blame] | 932 | deactivate_urbs(ep, false); |
Daniel Mack | 015618b | 2012-08-29 13:17:05 +0200 | [diff] [blame] | 933 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 934 | ep->active_mask = 0; |
| 935 | ep->unlink_mask = 0; |
| 936 | ep->phase = 0; |
| 937 | |
Daniel Mack | 2b58fd5 | 2012-09-04 10:23:07 +0200 | [diff] [blame] | 938 | snd_usb_endpoint_start_quirk(ep); |
| 939 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 940 | /* |
| 941 | * If this endpoint has a data endpoint as implicit feedback source, |
| 942 | * don't start the urbs here. Instead, mark them all as available, |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 943 | * wait for the record urbs to return and queue the playback urbs |
| 944 | * from that context. |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 945 | */ |
| 946 | |
| 947 | set_bit(EP_FLAG_RUNNING, &ep->flags); |
| 948 | |
Eldad Zack | 98ae472 | 2013-04-03 23:18:52 +0200 | [diff] [blame] | 949 | if (snd_usb_endpoint_implicit_feedback_sink(ep)) { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 950 | for (i = 0; i < ep->nurbs; i++) { |
| 951 | struct snd_urb_ctx *ctx = ep->urb + i; |
| 952 | list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs); |
| 953 | } |
| 954 | |
| 955 | return 0; |
| 956 | } |
| 957 | |
| 958 | for (i = 0; i < ep->nurbs; i++) { |
| 959 | struct urb *urb = ep->urb[i].urb; |
| 960 | |
| 961 | if (snd_BUG_ON(!urb)) |
| 962 | goto __error; |
| 963 | |
| 964 | if (usb_pipeout(ep->pipe)) { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 965 | prepare_outbound_urb(ep, urb->context); |
| 966 | } else { |
| 967 | prepare_inbound_urb(ep, urb->context); |
| 968 | } |
| 969 | |
| 970 | err = usb_submit_urb(urb, GFP_ATOMIC); |
| 971 | if (err < 0) { |
Takashi Iwai | 0ba41d9 | 2014-02-26 13:02:17 +0100 | [diff] [blame] | 972 | usb_audio_err(ep->chip, |
| 973 | "cannot submit urb %d, error %d: %s\n", |
| 974 | i, err, usb_error_string(err)); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 975 | goto __error; |
| 976 | } |
| 977 | set_bit(i, &ep->active_mask); |
| 978 | } |
| 979 | |
| 980 | return 0; |
| 981 | |
| 982 | __error: |
| 983 | clear_bit(EP_FLAG_RUNNING, &ep->flags); |
| 984 | ep->use_count--; |
Takashi Iwai | ccc1696 | 2012-11-21 08:22:52 +0100 | [diff] [blame] | 985 | deactivate_urbs(ep, false); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 986 | return -EPIPE; |
| 987 | } |
| 988 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 989 | /** |
| 990 | * snd_usb_endpoint_stop: stop an snd_usb_endpoint |
| 991 | * |
| 992 | * @ep: the endpoint to stop (may be NULL) |
| 993 | * |
| 994 | * A call to this function will decrement the use count of the endpoint. |
| 995 | * In case the last user has requested the endpoint stop, the URBs will |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 996 | * actually be deactivated. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 997 | * |
| 998 | * Must be balanced to calls of snd_usb_endpoint_start(). |
Takashi Iwai | b2eb950 | 2012-11-21 08:30:48 +0100 | [diff] [blame] | 999 | * |
| 1000 | * The caller needs to synchronize the pending stop operation via |
| 1001 | * snd_usb_endpoint_sync_pending_stop(). |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1002 | */ |
Takashi Iwai | b2eb950 | 2012-11-21 08:30:48 +0100 | [diff] [blame] | 1003 | void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1004 | { |
| 1005 | if (!ep) |
| 1006 | return; |
| 1007 | |
| 1008 | if (snd_BUG_ON(ep->use_count == 0)) |
| 1009 | return; |
| 1010 | |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1011 | if (--ep->use_count == 0) { |
Takashi Iwai | ccc1696 | 2012-11-21 08:22:52 +0100 | [diff] [blame] | 1012 | deactivate_urbs(ep, false); |
Takashi Iwai | b2eb950 | 2012-11-21 08:30:48 +0100 | [diff] [blame] | 1013 | set_bit(EP_FLAG_STOPPING, &ep->flags); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1014 | } |
| 1015 | } |
| 1016 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1017 | /** |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1018 | * snd_usb_endpoint_deactivate: deactivate an snd_usb_endpoint |
| 1019 | * |
| 1020 | * @ep: the endpoint to deactivate |
| 1021 | * |
Eldad Zack | 9b7c552 | 2013-10-06 22:31:10 +0200 | [diff] [blame] | 1022 | * If the endpoint is not currently in use, this functions will |
| 1023 | * deactivate its associated URBs. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1024 | * |
| 1025 | * In case of any active users, this functions does nothing. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1026 | */ |
Eldad Zack | 9b7c552 | 2013-10-06 22:31:10 +0200 | [diff] [blame] | 1027 | void snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1028 | { |
| 1029 | if (!ep) |
Eldad Zack | 9b7c552 | 2013-10-06 22:31:10 +0200 | [diff] [blame] | 1030 | return; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1031 | |
| 1032 | if (ep->use_count != 0) |
Eldad Zack | 9b7c552 | 2013-10-06 22:31:10 +0200 | [diff] [blame] | 1033 | return; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1034 | |
Eldad Zack | 239b9f7 | 2013-10-06 22:31:09 +0200 | [diff] [blame] | 1035 | deactivate_urbs(ep, true); |
| 1036 | wait_clear_urbs(ep); |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1037 | } |
| 1038 | |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 1039 | /** |
Takashi Iwai | 92a586b | 2014-06-25 14:24:47 +0200 | [diff] [blame] | 1040 | * snd_usb_endpoint_release: Tear down an snd_usb_endpoint |
| 1041 | * |
| 1042 | * @ep: the endpoint to release |
| 1043 | * |
| 1044 | * This function does not care for the endpoint's use count but will tear |
| 1045 | * down all the streaming URBs immediately. |
| 1046 | */ |
| 1047 | void snd_usb_endpoint_release(struct snd_usb_endpoint *ep) |
| 1048 | { |
| 1049 | release_urbs(ep, 1); |
| 1050 | } |
| 1051 | |
| 1052 | /** |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 1053 | * snd_usb_endpoint_free: Free the resources of an snd_usb_endpoint |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1054 | * |
Takashi Iwai | a6cece9 | 2014-10-31 11:24:32 +0100 | [diff] [blame] | 1055 | * @ep: the endpoint to free |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1056 | * |
Takashi Iwai | 92a586b | 2014-06-25 14:24:47 +0200 | [diff] [blame] | 1057 | * This free all resources of the given ep. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1058 | */ |
Takashi Iwai | a6cece9 | 2014-10-31 11:24:32 +0100 | [diff] [blame] | 1059 | void snd_usb_endpoint_free(struct snd_usb_endpoint *ep) |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1060 | { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1061 | kfree(ep); |
| 1062 | } |
| 1063 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1064 | /** |
| 1065 | * snd_usb_handle_sync_urb: parse an USB sync packet |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1066 | * |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1067 | * @ep: the endpoint to handle the packet |
| 1068 | * @sender: the sending endpoint |
| 1069 | * @urb: the received packet |
| 1070 | * |
| 1071 | * This function is called from the context of an endpoint that received |
| 1072 | * the packet and is used to let another endpoint object handle the payload. |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1073 | */ |
| 1074 | void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep, |
| 1075 | struct snd_usb_endpoint *sender, |
| 1076 | const struct urb *urb) |
| 1077 | { |
| 1078 | int shift; |
| 1079 | unsigned int f; |
| 1080 | unsigned long flags; |
| 1081 | |
| 1082 | snd_BUG_ON(ep == sender); |
| 1083 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1084 | /* |
| 1085 | * In case the endpoint is operating in implicit feedback mode, prepare |
Daniel Mack | 07a5e9d | 2012-04-24 19:31:24 +0200 | [diff] [blame] | 1086 | * a new outbound URB that has the same layout as the received packet |
| 1087 | * and add it to the list of pending urbs. queue_pending_output_urbs() |
| 1088 | * will take care of them later. |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1089 | */ |
Eldad Zack | 98ae472 | 2013-04-03 23:18:52 +0200 | [diff] [blame] | 1090 | if (snd_usb_endpoint_implicit_feedback_sink(ep) && |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1091 | ep->use_count != 0) { |
| 1092 | |
| 1093 | /* implicit feedback case */ |
| 1094 | int i, bytes = 0; |
| 1095 | struct snd_urb_ctx *in_ctx; |
| 1096 | struct snd_usb_packet_info *out_packet; |
| 1097 | |
| 1098 | in_ctx = urb->context; |
| 1099 | |
| 1100 | /* Count overall packet size */ |
| 1101 | for (i = 0; i < in_ctx->packets; i++) |
| 1102 | if (urb->iso_frame_desc[i].status == 0) |
| 1103 | bytes += urb->iso_frame_desc[i].actual_length; |
| 1104 | |
| 1105 | /* |
| 1106 | * skip empty packets. At least M-Audio's Fast Track Ultra stops |
| 1107 | * streaming once it received a 0-byte OUT URB |
| 1108 | */ |
| 1109 | if (bytes == 0) |
| 1110 | return; |
| 1111 | |
| 1112 | spin_lock_irqsave(&ep->lock, flags); |
| 1113 | out_packet = ep->next_packet + ep->next_packet_write_pos; |
| 1114 | |
| 1115 | /* |
| 1116 | * Iterate through the inbound packet and prepare the lengths |
| 1117 | * for the output packet. The OUT packet we are about to send |
Eldad Zack | 28acb12 | 2012-11-28 23:55:34 +0100 | [diff] [blame] | 1118 | * will have the same amount of payload bytes per stride as the |
| 1119 | * IN packet we just received. Since the actual size is scaled |
| 1120 | * by the stride, use the sender stride to calculate the length |
| 1121 | * in case the number of channels differ between the implicitly |
| 1122 | * fed-back endpoint and the synchronizing endpoint. |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1123 | */ |
| 1124 | |
| 1125 | out_packet->packets = in_ctx->packets; |
| 1126 | for (i = 0; i < in_ctx->packets; i++) { |
| 1127 | if (urb->iso_frame_desc[i].status == 0) |
| 1128 | out_packet->packet_size[i] = |
Eldad Zack | 28acb12 | 2012-11-28 23:55:34 +0100 | [diff] [blame] | 1129 | urb->iso_frame_desc[i].actual_length / sender->stride; |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1130 | else |
| 1131 | out_packet->packet_size[i] = 0; |
| 1132 | } |
| 1133 | |
| 1134 | ep->next_packet_write_pos++; |
| 1135 | ep->next_packet_write_pos %= MAX_URBS; |
| 1136 | spin_unlock_irqrestore(&ep->lock, flags); |
| 1137 | queue_pending_output_urbs(ep); |
| 1138 | |
| 1139 | return; |
| 1140 | } |
| 1141 | |
Daniel Mack | 94c2721 | 2012-04-12 13:51:15 +0200 | [diff] [blame] | 1142 | /* |
| 1143 | * process after playback sync complete |
| 1144 | * |
| 1145 | * Full speed devices report feedback values in 10.14 format as samples |
| 1146 | * per frame, high speed devices in 16.16 format as samples per |
| 1147 | * microframe. |
| 1148 | * |
| 1149 | * Because the Audio Class 1 spec was written before USB 2.0, many high |
| 1150 | * speed devices use a wrong interpretation, some others use an |
| 1151 | * entirely different format. |
| 1152 | * |
| 1153 | * Therefore, we cannot predict what format any particular device uses |
| 1154 | * and must detect it automatically. |
| 1155 | */ |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1156 | |
| 1157 | if (urb->iso_frame_desc[0].status != 0 || |
| 1158 | urb->iso_frame_desc[0].actual_length < 3) |
| 1159 | return; |
| 1160 | |
| 1161 | f = le32_to_cpup(urb->transfer_buffer); |
| 1162 | if (urb->iso_frame_desc[0].actual_length == 3) |
| 1163 | f &= 0x00ffffff; |
| 1164 | else |
| 1165 | f &= 0x0fffffff; |
| 1166 | |
| 1167 | if (f == 0) |
| 1168 | return; |
| 1169 | |
Daniel Mack | ca0dd27 | 2016-08-22 08:53:37 +0200 | [diff] [blame] | 1170 | if (unlikely(sender->tenor_fb_quirk)) { |
Clemens Ladisch | 7040b6d | 2014-05-01 12:20:22 +0200 | [diff] [blame] | 1171 | /* |
Daniel Mack | ca0dd27 | 2016-08-22 08:53:37 +0200 | [diff] [blame] | 1172 | * Devices based on Tenor 8802 chipsets (TEAC UD-H01 |
| 1173 | * and others) sometimes change the feedback value |
Clemens Ladisch | 7040b6d | 2014-05-01 12:20:22 +0200 | [diff] [blame] | 1174 | * by +/- 0x1.0000. |
| 1175 | */ |
| 1176 | if (f < ep->freqn - 0x8000) |
Daniel Mack | 36e1ac3 | 2016-08-22 08:53:38 +0200 | [diff] [blame] | 1177 | f += 0xf000; |
Clemens Ladisch | 7040b6d | 2014-05-01 12:20:22 +0200 | [diff] [blame] | 1178 | else if (f > ep->freqn + 0x8000) |
Daniel Mack | 36e1ac3 | 2016-08-22 08:53:38 +0200 | [diff] [blame] | 1179 | f -= 0xf000; |
Clemens Ladisch | 7040b6d | 2014-05-01 12:20:22 +0200 | [diff] [blame] | 1180 | } else if (unlikely(ep->freqshift == INT_MIN)) { |
Daniel Mack | 8fdff6a | 2012-04-12 13:51:11 +0200 | [diff] [blame] | 1181 | /* |
| 1182 | * The first time we see a feedback value, determine its format |
| 1183 | * by shifting it left or right until it matches the nominal |
| 1184 | * frequency value. This assumes that the feedback does not |
| 1185 | * differ from the nominal value more than +50% or -25%. |
| 1186 | */ |
| 1187 | shift = 0; |
| 1188 | while (f < ep->freqn - ep->freqn / 4) { |
| 1189 | f <<= 1; |
| 1190 | shift++; |
| 1191 | } |
| 1192 | while (f > ep->freqn + ep->freqn / 2) { |
| 1193 | f >>= 1; |
| 1194 | shift--; |
| 1195 | } |
| 1196 | ep->freqshift = shift; |
| 1197 | } else if (ep->freqshift >= 0) |
| 1198 | f <<= ep->freqshift; |
| 1199 | else |
| 1200 | f >>= -ep->freqshift; |
| 1201 | |
| 1202 | if (likely(f >= ep->freqn - ep->freqn / 8 && f <= ep->freqmax)) { |
| 1203 | /* |
| 1204 | * If the frequency looks valid, set it. |
| 1205 | * This value is referred to in prepare_playback_urb(). |
| 1206 | */ |
| 1207 | spin_lock_irqsave(&ep->lock, flags); |
| 1208 | ep->freqm = f; |
| 1209 | spin_unlock_irqrestore(&ep->lock, flags); |
| 1210 | } else { |
| 1211 | /* |
| 1212 | * Out of range; maybe the shift value is wrong. |
| 1213 | * Reset it so that we autodetect again the next time. |
| 1214 | */ |
| 1215 | ep->freqshift = INT_MIN; |
| 1216 | } |
| 1217 | } |
| 1218 | |