/* * Conexant Cx231xx audio extension * * Copyright (C) 2008 * Based on em28xx driver * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include "compat.h" #include #include #include #include #include #include #include #include "cx231xx.h" static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "activates debug info"); #define dprintk(fmt, arg...) do { \ if (debug) \ printk(KERN_INFO "cx231xx-audio %s: " fmt, \ __func__, ##arg); \ } while (0) static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; static int cx231xx_isoc_audio_deinit(struct cx231xx *dev) { int i; dprintk("Stopping isoc\n"); for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { if (dev->adev.urb[i]) { if (!irqs_disabled()) usb_kill_urb(dev->adev.urb[i]); else usb_unlink_urb(dev->adev.urb[i]); usb_free_urb(dev->adev.urb[i]); dev->adev.urb[i] = NULL; kfree(dev->adev.transfer_buffer[i]); dev->adev.transfer_buffer[i] = NULL; } } return 0; } #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19) static void cx231xx_audio_isocirq(struct urb *urb, struct pt_regs *regs) #else static void cx231xx_audio_isocirq(struct urb *urb) #endif { struct cx231xx *dev = urb->context; int i; unsigned int oldptr; #ifdef NO_PCM_LOCK unsigned long flags; #endif int period_elapsed = 0; int status; unsigned char *cp; unsigned int stride; #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) snd_pcm_substream_t *substream; snd_pcm_runtime_t *runtime; #else struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; #endif switch (urb->status) { case 0: /* success */ case -ETIMEDOUT: /* NAK */ break; case -ECONNRESET: /* kill */ case -ENOENT: case -ESHUTDOWN: return; default: /* error */ dprintk("urb completition error %d.\n", urb->status); break; } if (dev->adev.capture_pcm_substream) { substream = dev->adev.capture_pcm_substream; runtime = substream->runtime; stride = runtime->frame_bits >> 3; for (i = 0; i < urb->number_of_packets; i++) { int length = urb->iso_frame_desc[i].actual_length / stride; cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; if (!length) continue; #ifdef NO_PCM_LOCK spin_lock_irqsave(&dev->adev.slock, flags); #endif oldptr = dev->adev.hwptr_done_capture; if (oldptr + length >= runtime->buffer_size) { unsigned int cnt; cnt = runtime->buffer_size - oldptr; memcpy(runtime->dma_area + oldptr * stride, cp, cnt * stride); memcpy(runtime->dma_area, cp + cnt * stride, length * stride - cnt * stride); } else { memcpy(runtime->dma_area + oldptr * stride, cp, length * stride); } #ifndef NO_PCM_LOCK snd_pcm_stream_lock(substream); #endif dev->adev.hwptr_done_capture += length; if (dev->adev.hwptr_done_capture >= runtime->buffer_size) dev->adev.hwptr_done_capture -= runtime->buffer_size; dev->adev.capture_transfer_done += length; if (dev->adev.capture_transfer_done >= runtime->period_size) { dev->adev.capture_transfer_done -= runtime->period_size; period_elapsed = 1; } #ifdef NO_PCM_LOCK spin_unlock_irqrestore(&dev->adev.slock, flags); #else snd_pcm_stream_unlock(substream); #endif } if (period_elapsed) snd_pcm_period_elapsed(substream); } urb->status = 0; status = usb_submit_urb(urb, GFP_ATOMIC); if (status < 0) { cx231xx_errdev("resubmit of audio urb failed (error=%i)\n", status); } return; } static int cx231xx_init_audio_isoc(struct cx231xx *dev) { int i, errCode; int sb_size; cx231xx_info("%s: Starting AUDIO transfers\n", __func__); sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { struct urb *urb; int j, k; dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); if (!dev->adev.transfer_buffer[i]) return -ENOMEM; memset(dev->adev.transfer_buffer[i], 0x80, sb_size); urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC); if (!urb) { cx231xx_errdev("usb_alloc_urb failed!\n"); for (j = 0; j < i; j++) { usb_free_urb(dev->adev.urb[j]); kfree(dev->adev.transfer_buffer[j]); } return -ENOMEM; } urb->dev = dev->udev; urb->context = dev; urb->pipe = usb_rcvisocpipe(dev->udev, dev->adev.end_point_addr); urb->transfer_flags = URB_ISO_ASAP; urb->transfer_buffer = dev->adev.transfer_buffer[i]; urb->interval = 1; urb->complete = cx231xx_audio_isocirq; urb->number_of_packets = CX231XX_NUM_AUDIO_PACKETS; urb->transfer_buffer_length = sb_size; for (j = k = 0; j < CX231XX_NUM_AUDIO_PACKETS; j++, k += dev->adev.max_pkt_size) { urb->iso_frame_desc[j].offset = k; urb->iso_frame_desc[j].length = dev->adev.max_pkt_size; } dev->adev.urb[i] = urb; } for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); if (errCode < 0) { cx231xx_isoc_audio_deinit(dev); return errCode; } } return errCode; } static int cx231xx_cmd(struct cx231xx *dev, int cmd, int arg) { dprintk("%s transfer\n", (dev->adev.capture_stream == STREAM_ON) ? "stop" : "start"); switch (cmd) { case CX231XX_CAPTURE_STREAM_EN: if (dev->adev.capture_stream == STREAM_OFF && arg == 1) { dev->adev.capture_stream = STREAM_ON; cx231xx_init_audio_isoc(dev); } else if (dev->adev.capture_stream == STREAM_ON && arg == 0) { dev->adev.capture_stream = STREAM_OFF; cx231xx_isoc_audio_deinit(dev); } else { cx231xx_errdev("An underrun very likely occurred. " "Ignoring it.\n"); } return 0; default: return -EINVAL; } } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size) #else static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size) #endif { #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) snd_pcm_runtime_t *runtime = subs->runtime; #else struct snd_pcm_runtime *runtime = subs->runtime; #endif dprintk("Allocating vbuffer\n"); if (runtime->dma_area) { if (runtime->dma_bytes > size) return 0; vfree(runtime->dma_area); } runtime->dma_area = vmalloc(size); if (!runtime->dma_area) return -ENOMEM; runtime->dma_bytes = size; return 0; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static snd_pcm_hardware_t snd_cx231xx_hw_capture = { #else static struct snd_pcm_hardware snd_cx231xx_hw_capture = { #endif .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP_VALID, .formats = SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT, .rate_min = 48000, .rate_max = 48000, .channels_min = 2, .channels_max = 2, .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */ .period_bytes_min = 64, /* 12544/2, */ .period_bytes_max = 12544, .periods_min = 2, .periods_max = 98, /* 12544, */ }; #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static int snd_cx231xx_capture_open(snd_pcm_substream_t *substream) #else static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream) #endif { struct cx231xx *dev = snd_pcm_substream_chip(substream); #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) snd_pcm_runtime_t *runtime = substream->runtime; #else struct snd_pcm_runtime *runtime = substream->runtime; #endif int ret = 0; dprintk("opening device and trying to acquire exclusive lock\n"); if (!dev) { cx231xx_errdev("BUG: cx231xx can't find device struct." " Can't proceed with open\n"); return -ENODEV; } /* Sets volume, mute, etc */ dev->mute = 0; /* set alternate setting for audio interface */ /* 1 - 48000 samples per sec */ ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1); if (ret < 0) { cx231xx_errdev("failed to set alternate setting !\n"); return ret; } /* inform hardware to start streaming */ ret = cx231xx_capture_start(dev, 1, Audio); runtime->hw = snd_cx231xx_hw_capture; mutex_lock(&dev->lock); dev->adev.users++; mutex_unlock(&dev->lock); snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); dev->adev.capture_pcm_substream = substream; runtime->private_data = dev; return 0; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static int snd_cx231xx_pcm_close(snd_pcm_substream_t *substream) #else static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream) #endif { int ret; struct cx231xx *dev = snd_pcm_substream_chip(substream); dprintk("closing device\n"); /* set alternate setting for audio interface */ /* 1 - 48000 samples per sec */ ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0); if (ret < 0) { cx231xx_errdev("failed to set alternate setting !\n"); return ret; } /* inform hardware to start streaming */ ret = cx231xx_capture_start(dev, 0, Audio); dev->mute = 1; mutex_lock(&dev->lock); dev->adev.users--; mutex_unlock(&dev->lock); if (dev->adev.users == 0 && dev->adev.shutdown == 1) { dprintk("audio users: %d\n", dev->adev.users); dprintk("disabling audio stream!\n"); dev->adev.shutdown = 0; dprintk("released lock\n"); cx231xx_cmd(dev, CX231XX_CAPTURE_STREAM_EN, 0); } return 0; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static int snd_cx231xx_hw_capture_params(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *hw_params) #else static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) #endif { unsigned int channels, rate, format; int ret; dprintk("Setting capture parameters\n"); ret = snd_pcm_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); format = params_format(hw_params); rate = params_rate(hw_params); channels = params_channels(hw_params); /* TODO: set up cx231xx audio chip to deliver the correct audio format, current default is 48000hz multiplexed => 96000hz mono which shouldn't matter since analogue TV only supports mono */ return 0; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static int snd_cx231xx_hw_capture_free(snd_pcm_substream_t *substream) #else static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream) #endif { struct cx231xx *dev = snd_pcm_substream_chip(substream); dprintk("Stop capture, if needed\n"); if (dev->adev.capture_stream == STREAM_ON) cx231xx_cmd(dev, CX231XX_CAPTURE_STREAM_EN, CX231XX_STOP_AUDIO); return 0; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static int snd_cx231xx_prepare(snd_pcm_substream_t *substream) #else static int snd_cx231xx_prepare(struct snd_pcm_substream *substream) #endif { return 0; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static int snd_cx231xx_capture_trigger(snd_pcm_substream_t *substream, int cmd) #else static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream, int cmd) #endif { struct cx231xx *dev = snd_pcm_substream_chip(substream); int retval; dprintk("Should %s capture\n", (cmd == SNDRV_PCM_TRIGGER_START) ? "start" : "stop"); spin_lock(&dev->adev.slock); switch (cmd) { case SNDRV_PCM_TRIGGER_START: cx231xx_cmd(dev, CX231XX_CAPTURE_STREAM_EN, CX231XX_START_AUDIO); retval = 0; break; case SNDRV_PCM_TRIGGER_STOP: cx231xx_cmd(dev, CX231XX_CAPTURE_STREAM_EN, CX231XX_STOP_AUDIO); retval = 0; break; default: retval = -EINVAL; } spin_unlock(&dev->adev.slock); return retval; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static snd_pcm_uframes_t snd_cx231xx_capture_pointer(snd_pcm_substream_t *substream) #else static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream *substream) #endif { struct cx231xx *dev; unsigned long flags; snd_pcm_uframes_t hwptr_done; dev = snd_pcm_substream_chip(substream); spin_lock_irqsave(&dev->adev.slock, flags); hwptr_done = dev->adev.hwptr_done_capture; spin_unlock_irqrestore(&dev->adev.slock, flags); return hwptr_done; } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t * subs, unsigned long offset) #else static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, unsigned long offset) #endif { void *pageptr = subs->runtime->dma_area + offset; return vmalloc_to_page(pageptr); } #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) static snd_pcm_ops_t snd_cx231xx_pcm_capture = { #else static struct snd_pcm_ops snd_cx231xx_pcm_capture = { #endif .open = snd_cx231xx_capture_open, .close = snd_cx231xx_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_cx231xx_hw_capture_params, .hw_free = snd_cx231xx_hw_capture_free, .prepare = snd_cx231xx_prepare, .trigger = snd_cx231xx_capture_trigger, .pointer = snd_cx231xx_capture_pointer, .page = snd_pcm_get_vmalloc_page, }; static int cx231xx_audio_init(struct cx231xx *dev) { struct cx231xx_audio *adev = &dev->adev; #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 16) snd_pcm_t *pcm; snd_card_t *card; #else struct snd_pcm *pcm; struct snd_card *card; #endif static int devnr; int err; struct usb_interface *uif; int i, isoc_pipe = 0; if (dev->has_alsa_audio != 1) { /* This device does not support the extension (in this case the device is expecting the snd-usb-audio module or doesn't have analog audio support at all) */ return 0; } cx231xx_info("cx231xx-audio.c: probing for cx231xx " "non standard usbaudio\n"); err = snd_card_create(index[devnr], "Cx231xx Audio", THIS_MODULE, 0, &card); if (err < 0) return err; spin_lock_init(&adev->slock); err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm); if (err < 0) { snd_card_free(card); return err; } snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx231xx_pcm_capture); pcm->info_flags = 0; pcm->private_data = dev; strcpy(pcm->name, "Conexant cx231xx Capture"); strcpy(card->driver, "Conexant cx231xx Audio"); strcpy(card->shortname, "Cx231xx Audio"); strcpy(card->longname, "Conexant cx231xx Audio"); err = snd_card_register(card); if (err < 0) { snd_card_free(card); return err; } adev->sndcard = card; adev->udev = dev->udev; /* compute alternate max packet sizes for Audio */ uif = dev->udev->actconfig->interface[dev->current_pcb_config. hs_config_info[0].interface_info. audio_index + 1]; adev->end_point_addr = le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc. bEndpointAddress); adev->num_alt = uif->num_altsetting; cx231xx_info("EndPoint Addr 0x%x, Alternate settings: %i\n", adev->end_point_addr, adev->num_alt); adev->alt_max_pkt_size = kmalloc(32 * adev->num_alt, GFP_KERNEL); if (adev->alt_max_pkt_size == NULL) { cx231xx_errdev("out of memory!\n"); return -ENOMEM; } for (i = 0; i < adev->num_alt; i++) { u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc. wMaxPacketSize); adev->alt_max_pkt_size[i] = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); cx231xx_info("Alternate setting %i, max size= %i\n", i, adev->alt_max_pkt_size[i]); } return 0; } static int cx231xx_audio_fini(struct cx231xx *dev) { if (dev == NULL) return 0; if (dev->has_alsa_audio != 1) { /* This device does not support the extension (in this case the device is expecting the snd-usb-audio module or doesn't have analog audio support at all) */ return 0; } if (dev->adev.sndcard) { snd_card_free(dev->adev.sndcard); kfree(dev->adev.alt_max_pkt_size); dev->adev.sndcard = NULL; } return 0; } static struct cx231xx_ops audio_ops = { .id = CX231XX_AUDIO, .name = "Cx231xx Audio Extension", .init = cx231xx_audio_init, .fini = cx231xx_audio_fini, }; static int __init cx231xx_alsa_register(void) { return cx231xx_register_extension(&audio_ops); } static void __exit cx231xx_alsa_unregister(void) { cx231xx_unregister_extension(&audio_ops); } MODULE_LICENSE("GPL"); MODULE_AUTHOR("Srinivasa Deevi "); MODULE_DESCRIPTION("Cx231xx Audio driver"); module_init(cx231xx_alsa_register); module_exit(cx231xx_alsa_unregister);