Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Conexant Cx231xx audio extension |
| 3 | * |
| 4 | * Copyright (C) 2008 <srinivasa.deevi at conexant dot com> |
| 5 | * Based on em28xx driver |
| 6 | * |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/usb.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/sound.h> |
| 27 | #include <linux/spinlock.h> |
| 28 | #include <linux/soundcard.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/vmalloc.h> |
| 31 | #include <linux/proc_fs.h> |
| 32 | #include <linux/module.h> |
| 33 | #include <sound/core.h> |
| 34 | #include <sound/pcm.h> |
| 35 | #include <sound/pcm_params.h> |
| 36 | #include <sound/info.h> |
| 37 | #include <sound/initval.h> |
| 38 | #include <sound/control.h> |
| 39 | #include <media/v4l2-common.h> |
| 40 | #include "cx231xx.h" |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 41 | |
| 42 | static int debug; |
| 43 | module_param(debug, int, 0644); |
| 44 | MODULE_PARM_DESC(debug, "activates debug info"); |
| 45 | |
| 46 | #define dprintk(fmt, arg...) do { \ |
Sri Deevi | 6e4f574 | 2009-03-10 21:16:26 -0300 | [diff] [blame] | 47 | if (debug) \ |
| 48 | printk(KERN_INFO "cx231xx-audio %s: " fmt, \ |
| 49 | __func__, ##arg); \ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 50 | } while (0) |
| 51 | |
| 52 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; |
| 53 | |
| 54 | static int cx231xx_isoc_audio_deinit(struct cx231xx *dev) |
| 55 | { |
| 56 | int i; |
| 57 | |
| 58 | dprintk("Stopping isoc\n"); |
| 59 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 60 | for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 61 | if (dev->adev.urb[i]) { |
| 62 | if (!irqs_disabled()) |
| 63 | usb_kill_urb(dev->adev.urb[i]); |
| 64 | else |
| 65 | usb_unlink_urb(dev->adev.urb[i]); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 66 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 67 | usb_free_urb(dev->adev.urb[i]); |
| 68 | dev->adev.urb[i] = NULL; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 69 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 70 | kfree(dev->adev.transfer_buffer[i]); |
| 71 | dev->adev.transfer_buffer[i] = NULL; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 72 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 78 | static int cx231xx_bulk_audio_deinit(struct cx231xx *dev) |
| 79 | { |
| 80 | int i; |
| 81 | |
| 82 | dprintk("Stopping bulk\n"); |
| 83 | |
| 84 | for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
| 85 | if (dev->adev.urb[i]) { |
| 86 | if (!irqs_disabled()) |
| 87 | usb_kill_urb(dev->adev.urb[i]); |
| 88 | else |
| 89 | usb_unlink_urb(dev->adev.urb[i]); |
| 90 | |
| 91 | usb_free_urb(dev->adev.urb[i]); |
| 92 | dev->adev.urb[i] = NULL; |
| 93 | |
| 94 | kfree(dev->adev.transfer_buffer[i]); |
| 95 | dev->adev.transfer_buffer[i] = NULL; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | return 0; |
| 100 | } |
| 101 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 102 | static void cx231xx_audio_isocirq(struct urb *urb) |
| 103 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 104 | struct cx231xx *dev = urb->context; |
| 105 | int i; |
| 106 | unsigned int oldptr; |
| 107 | int period_elapsed = 0; |
| 108 | int status; |
| 109 | unsigned char *cp; |
| 110 | unsigned int stride; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 111 | struct snd_pcm_substream *substream; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 112 | struct snd_pcm_runtime *runtime; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 113 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 114 | switch (urb->status) { |
| 115 | case 0: /* success */ |
| 116 | case -ETIMEDOUT: /* NAK */ |
| 117 | break; |
| 118 | case -ECONNRESET: /* kill */ |
| 119 | case -ENOENT: |
| 120 | case -ESHUTDOWN: |
| 121 | return; |
| 122 | default: /* error */ |
| 123 | dprintk("urb completition error %d.\n", urb->status); |
| 124 | break; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 125 | } |
| 126 | |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 127 | if (atomic_read(&dev->stream_started) == 0) |
| 128 | return; |
| 129 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 130 | if (dev->adev.capture_pcm_substream) { |
| 131 | substream = dev->adev.capture_pcm_substream; |
| 132 | runtime = substream->runtime; |
| 133 | stride = runtime->frame_bits >> 3; |
| 134 | |
| 135 | for (i = 0; i < urb->number_of_packets; i++) { |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame] | 136 | int length = urb->iso_frame_desc[i].actual_length / |
| 137 | stride; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 138 | cp = (unsigned char *)urb->transfer_buffer + |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame] | 139 | urb->iso_frame_desc[i].offset; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 140 | |
| 141 | if (!length) |
| 142 | continue; |
| 143 | |
| 144 | oldptr = dev->adev.hwptr_done_capture; |
| 145 | if (oldptr + length >= runtime->buffer_size) { |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame] | 146 | unsigned int cnt; |
| 147 | |
| 148 | cnt = runtime->buffer_size - oldptr; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 149 | memcpy(runtime->dma_area + oldptr * stride, cp, |
| 150 | cnt * stride); |
| 151 | memcpy(runtime->dma_area, cp + cnt * stride, |
| 152 | length * stride - cnt * stride); |
| 153 | } else { |
| 154 | memcpy(runtime->dma_area + oldptr * stride, cp, |
| 155 | length * stride); |
| 156 | } |
| 157 | |
| 158 | snd_pcm_stream_lock(substream); |
| 159 | |
| 160 | dev->adev.hwptr_done_capture += length; |
Sri Deevi | b925517 | 2009-03-04 17:49:01 -0300 | [diff] [blame] | 161 | if (dev->adev.hwptr_done_capture >= |
| 162 | runtime->buffer_size) |
| 163 | dev->adev.hwptr_done_capture -= |
| 164 | runtime->buffer_size; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 165 | |
| 166 | dev->adev.capture_transfer_done += length; |
Sri Deevi | b925517 | 2009-03-04 17:49:01 -0300 | [diff] [blame] | 167 | if (dev->adev.capture_transfer_done >= |
| 168 | runtime->period_size) { |
| 169 | dev->adev.capture_transfer_done -= |
| 170 | runtime->period_size; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 171 | period_elapsed = 1; |
| 172 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 173 | snd_pcm_stream_unlock(substream); |
| 174 | } |
| 175 | if (period_elapsed) |
| 176 | snd_pcm_period_elapsed(substream); |
| 177 | } |
| 178 | urb->status = 0; |
| 179 | |
| 180 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 181 | if (status < 0) { |
| 182 | cx231xx_errdev("resubmit of audio urb failed (error=%i)\n", |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 183 | status); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 184 | } |
| 185 | return; |
| 186 | } |
| 187 | |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 188 | static void cx231xx_audio_bulkirq(struct urb *urb) |
| 189 | { |
| 190 | struct cx231xx *dev = urb->context; |
| 191 | unsigned int oldptr; |
| 192 | int period_elapsed = 0; |
| 193 | int status; |
| 194 | unsigned char *cp; |
| 195 | unsigned int stride; |
| 196 | struct snd_pcm_substream *substream; |
| 197 | struct snd_pcm_runtime *runtime; |
| 198 | |
| 199 | switch (urb->status) { |
| 200 | case 0: /* success */ |
| 201 | case -ETIMEDOUT: /* NAK */ |
| 202 | break; |
| 203 | case -ECONNRESET: /* kill */ |
| 204 | case -ENOENT: |
| 205 | case -ESHUTDOWN: |
| 206 | return; |
| 207 | default: /* error */ |
| 208 | dprintk("urb completition error %d.\n", urb->status); |
| 209 | break; |
| 210 | } |
| 211 | |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 212 | if (atomic_read(&dev->stream_started) == 0) |
| 213 | return; |
| 214 | |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 215 | if (dev->adev.capture_pcm_substream) { |
| 216 | substream = dev->adev.capture_pcm_substream; |
| 217 | runtime = substream->runtime; |
| 218 | stride = runtime->frame_bits >> 3; |
| 219 | |
| 220 | if (1) { |
| 221 | int length = urb->actual_length / |
| 222 | stride; |
| 223 | cp = (unsigned char *)urb->transfer_buffer; |
| 224 | |
| 225 | oldptr = dev->adev.hwptr_done_capture; |
| 226 | if (oldptr + length >= runtime->buffer_size) { |
| 227 | unsigned int cnt; |
| 228 | |
| 229 | cnt = runtime->buffer_size - oldptr; |
| 230 | memcpy(runtime->dma_area + oldptr * stride, cp, |
| 231 | cnt * stride); |
| 232 | memcpy(runtime->dma_area, cp + cnt * stride, |
| 233 | length * stride - cnt * stride); |
| 234 | } else { |
| 235 | memcpy(runtime->dma_area + oldptr * stride, cp, |
| 236 | length * stride); |
| 237 | } |
| 238 | |
| 239 | snd_pcm_stream_lock(substream); |
| 240 | |
| 241 | dev->adev.hwptr_done_capture += length; |
| 242 | if (dev->adev.hwptr_done_capture >= |
| 243 | runtime->buffer_size) |
| 244 | dev->adev.hwptr_done_capture -= |
| 245 | runtime->buffer_size; |
| 246 | |
| 247 | dev->adev.capture_transfer_done += length; |
| 248 | if (dev->adev.capture_transfer_done >= |
| 249 | runtime->period_size) { |
| 250 | dev->adev.capture_transfer_done -= |
| 251 | runtime->period_size; |
| 252 | period_elapsed = 1; |
| 253 | } |
| 254 | snd_pcm_stream_unlock(substream); |
| 255 | } |
| 256 | if (period_elapsed) |
| 257 | snd_pcm_period_elapsed(substream); |
| 258 | } |
| 259 | urb->status = 0; |
| 260 | |
| 261 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 262 | if (status < 0) { |
| 263 | cx231xx_errdev("resubmit of audio urb failed (error=%i)\n", |
| 264 | status); |
| 265 | } |
| 266 | return; |
| 267 | } |
| 268 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 269 | static int cx231xx_init_audio_isoc(struct cx231xx *dev) |
| 270 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 271 | int i, errCode; |
| 272 | int sb_size; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 273 | |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 274 | cx231xx_info("%s: Starting ISO AUDIO transfers\n", __func__); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 275 | |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 276 | sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 277 | |
| 278 | for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
| 279 | struct urb *urb; |
| 280 | int j, k; |
| 281 | |
| 282 | dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); |
| 283 | if (!dev->adev.transfer_buffer[i]) |
| 284 | return -ENOMEM; |
| 285 | |
| 286 | memset(dev->adev.transfer_buffer[i], 0x80, sb_size); |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 287 | urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 288 | if (!urb) { |
| 289 | cx231xx_errdev("usb_alloc_urb failed!\n"); |
| 290 | for (j = 0; j < i; j++) { |
| 291 | usb_free_urb(dev->adev.urb[j]); |
| 292 | kfree(dev->adev.transfer_buffer[j]); |
| 293 | } |
| 294 | return -ENOMEM; |
| 295 | } |
| 296 | |
| 297 | urb->dev = dev->udev; |
| 298 | urb->context = dev; |
Sri Deevi | b925517 | 2009-03-04 17:49:01 -0300 | [diff] [blame] | 299 | urb->pipe = usb_rcvisocpipe(dev->udev, |
| 300 | dev->adev.end_point_addr); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 301 | urb->transfer_flags = URB_ISO_ASAP; |
| 302 | urb->transfer_buffer = dev->adev.transfer_buffer[i]; |
| 303 | urb->interval = 1; |
| 304 | urb->complete = cx231xx_audio_isocirq; |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 305 | urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 306 | urb->transfer_buffer_length = sb_size; |
| 307 | |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 308 | for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS; |
Sri Deevi | b925517 | 2009-03-04 17:49:01 -0300 | [diff] [blame] | 309 | j++, k += dev->adev.max_pkt_size) { |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 310 | urb->iso_frame_desc[j].offset = k; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 311 | urb->iso_frame_desc[j].length = dev->adev.max_pkt_size; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 312 | } |
| 313 | dev->adev.urb[i] = urb; |
| 314 | } |
| 315 | |
| 316 | for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
| 317 | errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); |
| 318 | if (errCode < 0) { |
| 319 | cx231xx_isoc_audio_deinit(dev); |
| 320 | return errCode; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | return errCode; |
| 325 | } |
| 326 | |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 327 | static int cx231xx_init_audio_bulk(struct cx231xx *dev) |
| 328 | { |
| 329 | int i, errCode; |
| 330 | int sb_size; |
| 331 | |
| 332 | cx231xx_info("%s: Starting BULK AUDIO transfers\n", __func__); |
| 333 | |
| 334 | sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; |
| 335 | |
| 336 | for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
| 337 | struct urb *urb; |
| 338 | int j; |
| 339 | |
| 340 | dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); |
| 341 | if (!dev->adev.transfer_buffer[i]) |
| 342 | return -ENOMEM; |
| 343 | |
| 344 | memset(dev->adev.transfer_buffer[i], 0x80, sb_size); |
| 345 | urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC); |
| 346 | if (!urb) { |
| 347 | cx231xx_errdev("usb_alloc_urb failed!\n"); |
| 348 | for (j = 0; j < i; j++) { |
| 349 | usb_free_urb(dev->adev.urb[j]); |
| 350 | kfree(dev->adev.transfer_buffer[j]); |
| 351 | } |
| 352 | return -ENOMEM; |
| 353 | } |
| 354 | |
| 355 | urb->dev = dev->udev; |
| 356 | urb->context = dev; |
| 357 | urb->pipe = usb_rcvbulkpipe(dev->udev, |
| 358 | dev->adev.end_point_addr); |
| 359 | urb->transfer_flags = 0; |
| 360 | urb->transfer_buffer = dev->adev.transfer_buffer[i]; |
| 361 | urb->complete = cx231xx_audio_bulkirq; |
| 362 | urb->transfer_buffer_length = sb_size; |
| 363 | |
| 364 | dev->adev.urb[i] = urb; |
| 365 | |
| 366 | } |
| 367 | |
| 368 | for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { |
| 369 | errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); |
| 370 | if (errCode < 0) { |
| 371 | cx231xx_bulk_audio_deinit(dev); |
| 372 | return errCode; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | return errCode; |
| 377 | } |
| 378 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 379 | static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, |
| 380 | size_t size) |
| 381 | { |
| 382 | struct snd_pcm_runtime *runtime = subs->runtime; |
| 383 | |
| 384 | dprintk("Allocating vbuffer\n"); |
| 385 | if (runtime->dma_area) { |
| 386 | if (runtime->dma_bytes > size) |
| 387 | return 0; |
| 388 | |
| 389 | vfree(runtime->dma_area); |
| 390 | } |
| 391 | runtime->dma_area = vmalloc(size); |
| 392 | if (!runtime->dma_area) |
| 393 | return -ENOMEM; |
| 394 | |
| 395 | runtime->dma_bytes = size; |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static struct snd_pcm_hardware snd_cx231xx_hw_capture = { |
Sri Deevi | 6e4f574 | 2009-03-10 21:16:26 -0300 | [diff] [blame] | 401 | .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 402 | SNDRV_PCM_INFO_MMAP | |
| 403 | SNDRV_PCM_INFO_INTERLEAVED | |
| 404 | SNDRV_PCM_INFO_MMAP_VALID, |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 405 | |
| 406 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 407 | |
| 408 | .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT, |
| 409 | |
| 410 | .rate_min = 48000, |
| 411 | .rate_max = 48000, |
| 412 | .channels_min = 2, |
| 413 | .channels_max = 2, |
| 414 | .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */ |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame] | 415 | .period_bytes_min = 64, /* 12544/2, */ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 416 | .period_bytes_max = 12544, |
| 417 | .periods_min = 2, |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame] | 418 | .periods_max = 98, /* 12544, */ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 419 | }; |
| 420 | |
| 421 | static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream) |
| 422 | { |
| 423 | struct cx231xx *dev = snd_pcm_substream_chip(substream); |
| 424 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 425 | int ret = 0; |
| 426 | |
| 427 | dprintk("opening device and trying to acquire exclusive lock\n"); |
| 428 | |
| 429 | if (!dev) { |
| 430 | cx231xx_errdev("BUG: cx231xx can't find device struct." |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 431 | " Can't proceed with open\n"); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 432 | return -ENODEV; |
| 433 | } |
| 434 | |
| 435 | /* Sets volume, mute, etc */ |
| 436 | dev->mute = 0; |
| 437 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 438 | /* set alternate setting for audio interface */ |
Sri Deevi | b925517 | 2009-03-04 17:49:01 -0300 | [diff] [blame] | 439 | /* 1 - 48000 samples per sec */ |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 440 | mutex_lock(&dev->lock); |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 441 | if (dev->USE_ISO) |
| 442 | ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1); |
| 443 | else |
| 444 | ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0); |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 445 | mutex_unlock(&dev->lock); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 446 | if (ret < 0) { |
| 447 | cx231xx_errdev("failed to set alternate setting !\n"); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 448 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 449 | return ret; |
| 450 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 451 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 452 | runtime->hw = snd_cx231xx_hw_capture; |
| 453 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 454 | mutex_lock(&dev->lock); |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 455 | /* inform hardware to start streaming */ |
| 456 | ret = cx231xx_capture_start(dev, 1, Audio); |
| 457 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 458 | dev->adev.users++; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 459 | mutex_unlock(&dev->lock); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 460 | |
| 461 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
| 462 | dev->adev.capture_pcm_substream = substream; |
| 463 | runtime->private_data = dev; |
| 464 | |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream) |
| 469 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 470 | int ret; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 471 | struct cx231xx *dev = snd_pcm_substream_chip(substream); |
| 472 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 473 | dprintk("closing device\n"); |
| 474 | |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 475 | /* inform hardware to stop streaming */ |
| 476 | mutex_lock(&dev->lock); |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 477 | ret = cx231xx_capture_start(dev, 0, Audio); |
| 478 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 479 | /* set alternate setting for audio interface */ |
Sri Deevi | b925517 | 2009-03-04 17:49:01 -0300 | [diff] [blame] | 480 | /* 1 - 48000 samples per sec */ |
| 481 | ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 482 | if (ret < 0) { |
| 483 | cx231xx_errdev("failed to set alternate setting !\n"); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 484 | |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 485 | mutex_unlock(&dev->lock); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 486 | return ret; |
| 487 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 488 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 489 | dev->mute = 1; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 490 | dev->adev.users--; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 491 | mutex_unlock(&dev->lock); |
| 492 | |
| 493 | if (dev->adev.users == 0 && dev->adev.shutdown == 1) { |
| 494 | dprintk("audio users: %d\n", dev->adev.users); |
| 495 | dprintk("disabling audio stream!\n"); |
| 496 | dev->adev.shutdown = 0; |
| 497 | dprintk("released lock\n"); |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 498 | if (atomic_read(&dev->stream_started) > 0) { |
| 499 | atomic_set(&dev->stream_started, 0); |
| 500 | schedule_work(&dev->wq_trigger); |
| 501 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 502 | } |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream *substream, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 507 | struct snd_pcm_hw_params *hw_params) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 508 | { |
| 509 | unsigned int channels, rate, format; |
| 510 | int ret; |
| 511 | |
| 512 | dprintk("Setting capture parameters\n"); |
| 513 | |
| 514 | ret = snd_pcm_alloc_vmalloc_buffer(substream, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 515 | params_buffer_bytes(hw_params)); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 516 | format = params_format(hw_params); |
| 517 | rate = params_rate(hw_params); |
| 518 | channels = params_channels(hw_params); |
| 519 | |
| 520 | /* TODO: set up cx231xx audio chip to deliver the correct audio format, |
| 521 | current default is 48000hz multiplexed => 96000hz mono |
| 522 | which shouldn't matter since analogue TV only supports mono */ |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream) |
| 527 | { |
| 528 | struct cx231xx *dev = snd_pcm_substream_chip(substream); |
| 529 | |
| 530 | dprintk("Stop capture, if needed\n"); |
| 531 | |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 532 | if (atomic_read(&dev->stream_started) > 0) { |
| 533 | atomic_set(&dev->stream_started, 0); |
| 534 | schedule_work(&dev->wq_trigger); |
| 535 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 536 | |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | static int snd_cx231xx_prepare(struct snd_pcm_substream *substream) |
| 541 | { |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 542 | struct cx231xx *dev = snd_pcm_substream_chip(substream); |
| 543 | |
| 544 | dev->adev.hwptr_done_capture = 0; |
| 545 | dev->adev.capture_transfer_done = 0; |
| 546 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 547 | return 0; |
| 548 | } |
| 549 | |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 550 | static void audio_trigger(struct work_struct *work) |
| 551 | { |
| 552 | struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger); |
| 553 | |
| 554 | if (atomic_read(&dev->stream_started)) { |
| 555 | dprintk("starting capture"); |
| 556 | if (is_fw_load(dev) == 0) |
| 557 | cx25840_call(dev, core, load_fw); |
| 558 | if (dev->USE_ISO) |
| 559 | cx231xx_init_audio_isoc(dev); |
| 560 | else |
| 561 | cx231xx_init_audio_bulk(dev); |
| 562 | } else { |
| 563 | dprintk("stopping capture"); |
| 564 | cx231xx_isoc_audio_deinit(dev); |
| 565 | } |
| 566 | } |
| 567 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 568 | static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 569 | int cmd) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 570 | { |
| 571 | struct cx231xx *dev = snd_pcm_substream_chip(substream); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 572 | int retval; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 573 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 574 | spin_lock(&dev->adev.slock); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 575 | switch (cmd) { |
| 576 | case SNDRV_PCM_TRIGGER_START: |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 577 | atomic_set(&dev->stream_started, 1); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 578 | break; |
| 579 | case SNDRV_PCM_TRIGGER_STOP: |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 580 | atomic_set(&dev->stream_started, 0); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 581 | break; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 582 | default: |
| 583 | retval = -EINVAL; |
| 584 | } |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 585 | spin_unlock(&dev->adev.slock); |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 586 | |
| 587 | schedule_work(&dev->wq_trigger); |
| 588 | |
| 589 | return 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 593 | *substream) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 594 | { |
| 595 | struct cx231xx *dev; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 596 | unsigned long flags; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 597 | snd_pcm_uframes_t hwptr_done; |
| 598 | |
| 599 | dev = snd_pcm_substream_chip(substream); |
| 600 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 601 | spin_lock_irqsave(&dev->adev.slock, flags); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 602 | hwptr_done = dev->adev.hwptr_done_capture; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 603 | spin_unlock_irqrestore(&dev->adev.slock, flags); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 604 | |
| 605 | return hwptr_done; |
| 606 | } |
| 607 | |
| 608 | static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, |
| 609 | unsigned long offset) |
| 610 | { |
| 611 | void *pageptr = subs->runtime->dma_area + offset; |
| 612 | |
| 613 | return vmalloc_to_page(pageptr); |
| 614 | } |
| 615 | |
| 616 | static struct snd_pcm_ops snd_cx231xx_pcm_capture = { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 617 | .open = snd_cx231xx_capture_open, |
| 618 | .close = snd_cx231xx_pcm_close, |
| 619 | .ioctl = snd_pcm_lib_ioctl, |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 620 | .hw_params = snd_cx231xx_hw_capture_params, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 621 | .hw_free = snd_cx231xx_hw_capture_free, |
| 622 | .prepare = snd_cx231xx_prepare, |
| 623 | .trigger = snd_cx231xx_capture_trigger, |
| 624 | .pointer = snd_cx231xx_capture_pointer, |
| 625 | .page = snd_pcm_get_vmalloc_page, |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 626 | }; |
| 627 | |
| 628 | static int cx231xx_audio_init(struct cx231xx *dev) |
| 629 | { |
| 630 | struct cx231xx_audio *adev = &dev->adev; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 631 | struct snd_pcm *pcm; |
| 632 | struct snd_card *card; |
| 633 | static int devnr; |
| 634 | int err; |
| 635 | struct usb_interface *uif; |
| 636 | int i, isoc_pipe = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 637 | |
| 638 | if (dev->has_alsa_audio != 1) { |
| 639 | /* This device does not support the extension (in this case |
| 640 | the device is expecting the snd-usb-audio module or |
| 641 | doesn't have analog audio support at all) */ |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | cx231xx_info("cx231xx-audio.c: probing for cx231xx " |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 646 | "non standard usbaudio\n"); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 647 | |
Mauro Carvalho Chehab | a938b8c | 2009-04-06 21:25:29 -0300 | [diff] [blame] | 648 | err = snd_card_create(index[devnr], "Cx231xx Audio", THIS_MODULE, |
| 649 | 0, &card); |
| 650 | if (err < 0) |
| 651 | return err; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 652 | |
| 653 | spin_lock_init(&adev->slock); |
| 654 | err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm); |
| 655 | if (err < 0) { |
| 656 | snd_card_free(card); |
| 657 | return err; |
| 658 | } |
| 659 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 660 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, |
| 661 | &snd_cx231xx_pcm_capture); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 662 | pcm->info_flags = 0; |
| 663 | pcm->private_data = dev; |
| 664 | strcpy(pcm->name, "Conexant cx231xx Capture"); |
Palash Bandyopadhyay | 64fbf44 | 2010-07-06 18:12:25 -0300 | [diff] [blame] | 665 | snd_card_set_dev(card, &dev->udev->dev); |
Dan Carpenter | 935539c | 2010-03-22 12:39:09 -0300 | [diff] [blame] | 666 | strcpy(card->driver, "Cx231xx-Audio"); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 667 | strcpy(card->shortname, "Cx231xx Audio"); |
| 668 | strcpy(card->longname, "Conexant cx231xx Audio"); |
| 669 | |
Mauro Carvalho Chehab | 61b04cb | 2010-09-27 03:07:22 -0300 | [diff] [blame] | 670 | INIT_WORK(&dev->wq_trigger, audio_trigger); |
| 671 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 672 | err = snd_card_register(card); |
| 673 | if (err < 0) { |
| 674 | snd_card_free(card); |
| 675 | return err; |
| 676 | } |
| 677 | adev->sndcard = card; |
| 678 | adev->udev = dev->udev; |
| 679 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 680 | /* compute alternate max packet sizes for Audio */ |
| 681 | uif = |
| 682 | dev->udev->actconfig->interface[dev->current_pcb_config. |
| 683 | hs_config_info[0].interface_info. |
| 684 | audio_index + 1]; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 685 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 686 | adev->end_point_addr = |
| 687 | le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc. |
| 688 | bEndpointAddress); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 689 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 690 | adev->num_alt = uif->num_altsetting; |
Mauro Carvalho Chehab | 4be1ad3 | 2009-03-22 08:28:30 -0300 | [diff] [blame] | 691 | cx231xx_info("EndPoint Addr 0x%x, Alternate settings: %i\n", |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 692 | adev->end_point_addr, adev->num_alt); |
| 693 | adev->alt_max_pkt_size = kmalloc(32 * adev->num_alt, GFP_KERNEL); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 694 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 695 | if (adev->alt_max_pkt_size == NULL) { |
| 696 | cx231xx_errdev("out of memory!\n"); |
| 697 | return -ENOMEM; |
| 698 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 699 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 700 | for (i = 0; i < adev->num_alt; i++) { |
| 701 | u16 tmp = |
| 702 | le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc. |
| 703 | wMaxPacketSize); |
| 704 | adev->alt_max_pkt_size[i] = |
| 705 | (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); |
| 706 | cx231xx_info("Alternate setting %i, max size= %i\n", i, |
| 707 | adev->alt_max_pkt_size[i]); |
| 708 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 709 | |
| 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | static int cx231xx_audio_fini(struct cx231xx *dev) |
| 714 | { |
| 715 | if (dev == NULL) |
| 716 | return 0; |
| 717 | |
| 718 | if (dev->has_alsa_audio != 1) { |
| 719 | /* This device does not support the extension (in this case |
| 720 | the device is expecting the snd-usb-audio module or |
| 721 | doesn't have analog audio support at all) */ |
| 722 | return 0; |
| 723 | } |
| 724 | |
| 725 | if (dev->adev.sndcard) { |
| 726 | snd_card_free(dev->adev.sndcard); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 727 | kfree(dev->adev.alt_max_pkt_size); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 728 | dev->adev.sndcard = NULL; |
| 729 | } |
| 730 | |
| 731 | return 0; |
| 732 | } |
| 733 | |
| 734 | static struct cx231xx_ops audio_ops = { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 735 | .id = CX231XX_AUDIO, |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 736 | .name = "Cx231xx Audio Extension", |
| 737 | .init = cx231xx_audio_init, |
| 738 | .fini = cx231xx_audio_fini, |
| 739 | }; |
| 740 | |
| 741 | static int __init cx231xx_alsa_register(void) |
| 742 | { |
| 743 | return cx231xx_register_extension(&audio_ops); |
| 744 | } |
| 745 | |
| 746 | static void __exit cx231xx_alsa_unregister(void) |
| 747 | { |
| 748 | cx231xx_unregister_extension(&audio_ops); |
| 749 | } |
| 750 | |
| 751 | MODULE_LICENSE("GPL"); |
| 752 | MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>"); |
| 753 | MODULE_DESCRIPTION("Cx231xx Audio driver"); |
| 754 | |
| 755 | module_init(cx231xx_alsa_register); |
| 756 | module_exit(cx231xx_alsa_unregister); |