![Bill Pemberton](/assets/img/avatar_default.png)
CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Peter Korsgaard <jacmet@sunsite.dk> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Acked-by: Felipe Balbi <balbi@ti.com> Cc: Li Yang <leoli@freescale.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Cc: Geoff Levand <geoff@infradead.org> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Olav Kongas <ok@artecdesign.ee> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Kukjin Kim <kgene.kim@samsung.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1378 lines
35 KiB
C
1378 lines
35 KiB
C
/*
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* f_uac2.c -- USB Audio Class 2.0 Function
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*
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* Copyright (C) 2011
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* Yadwinder Singh (yadi.brar01@gmail.com)
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* Jaswinder Singh (jaswinder.singh@linaro.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/usb/audio.h>
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#include <linux/usb/audio-v2.h>
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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/* Playback(USB-IN) Default Stereo - Fl/Fr */
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static int p_chmask = 0x3;
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module_param(p_chmask, uint, S_IRUGO);
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MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");
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/* Playback Default 48 KHz */
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static int p_srate = 48000;
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module_param(p_srate, uint, S_IRUGO);
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MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");
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/* Playback Default 16bits/sample */
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static int p_ssize = 2;
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module_param(p_ssize, uint, S_IRUGO);
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MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");
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/* Capture(USB-OUT) Default Stereo - Fl/Fr */
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static int c_chmask = 0x3;
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module_param(c_chmask, uint, S_IRUGO);
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MODULE_PARM_DESC(c_chmask, "Capture Channel Mask");
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/* Capture Default 64 KHz */
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static int c_srate = 64000;
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module_param(c_srate, uint, S_IRUGO);
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MODULE_PARM_DESC(c_srate, "Capture Sampling Rate");
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/* Capture Default 16bits/sample */
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static int c_ssize = 2;
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module_param(c_ssize, uint, S_IRUGO);
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MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
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/* Keep everyone on toes */
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#define USB_XFERS 2
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/*
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* The driver implements a simple UAC_2 topology.
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* USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture
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* ALSA_Playback -> IT_2 -> OT_4 -> USB-IN
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* Capture and Playback sampling rates are independently
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* controlled by two clock sources :
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* CLK_5 := c_srate, and CLK_6 := p_srate
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*/
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#define USB_OUT_IT_ID 1
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#define IO_IN_IT_ID 2
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#define IO_OUT_OT_ID 3
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#define USB_IN_OT_ID 4
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#define USB_OUT_CLK_ID 5
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#define USB_IN_CLK_ID 6
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#define CONTROL_ABSENT 0
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#define CONTROL_RDONLY 1
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#define CONTROL_RDWR 3
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#define CLK_FREQ_CTRL 0
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#define CLK_VLD_CTRL 2
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#define COPY_CTRL 0
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#define CONN_CTRL 2
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#define OVRLD_CTRL 4
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#define CLSTR_CTRL 6
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#define UNFLW_CTRL 8
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#define OVFLW_CTRL 10
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const char *uac2_name = "snd_uac2";
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struct uac2_req {
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struct uac2_rtd_params *pp; /* parent param */
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struct usb_request *req;
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};
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struct uac2_rtd_params {
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bool ep_enabled; /* if the ep is enabled */
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/* Size of the ring buffer */
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size_t dma_bytes;
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unsigned char *dma_area;
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struct snd_pcm_substream *ss;
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/* Ring buffer */
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ssize_t hw_ptr;
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void *rbuf;
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size_t period_size;
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unsigned max_psize;
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struct uac2_req ureq[USB_XFERS];
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spinlock_t lock;
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};
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struct snd_uac2_chip {
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struct platform_device pdev;
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struct platform_driver pdrv;
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struct uac2_rtd_params p_prm;
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struct uac2_rtd_params c_prm;
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struct snd_card *card;
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struct snd_pcm *pcm;
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};
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#define BUFF_SIZE_MAX (PAGE_SIZE * 16)
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#define PRD_SIZE_MAX PAGE_SIZE
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#define MIN_PERIODS 4
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static struct snd_pcm_hardware uac2_pcm_hardware = {
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.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER
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| SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID
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| SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
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.rates = SNDRV_PCM_RATE_CONTINUOUS,
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.periods_max = BUFF_SIZE_MAX / PRD_SIZE_MAX,
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.buffer_bytes_max = BUFF_SIZE_MAX,
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.period_bytes_max = PRD_SIZE_MAX,
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.periods_min = MIN_PERIODS,
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};
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struct audio_dev {
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u8 ac_intf, ac_alt;
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u8 as_out_intf, as_out_alt;
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u8 as_in_intf, as_in_alt;
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struct usb_ep *in_ep, *out_ep;
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struct usb_function func;
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/* The ALSA Sound Card it represents on the USB-Client side */
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struct snd_uac2_chip uac2;
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};
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static struct audio_dev *agdev_g;
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static inline
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struct audio_dev *func_to_agdev(struct usb_function *f)
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{
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return container_of(f, struct audio_dev, func);
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}
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static inline
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struct audio_dev *uac2_to_agdev(struct snd_uac2_chip *u)
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{
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return container_of(u, struct audio_dev, uac2);
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}
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static inline
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struct snd_uac2_chip *pdev_to_uac2(struct platform_device *p)
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{
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return container_of(p, struct snd_uac2_chip, pdev);
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}
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static inline
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struct snd_uac2_chip *prm_to_uac2(struct uac2_rtd_params *r)
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{
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struct snd_uac2_chip *uac2 = container_of(r,
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struct snd_uac2_chip, c_prm);
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if (&uac2->c_prm != r)
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uac2 = container_of(r, struct snd_uac2_chip, p_prm);
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return uac2;
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}
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static inline
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uint num_channels(uint chanmask)
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{
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uint num = 0;
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while (chanmask) {
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num += (chanmask & 1);
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chanmask >>= 1;
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}
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return num;
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}
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static void
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agdev_iso_complete(struct usb_ep *ep, struct usb_request *req)
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{
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unsigned pending;
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unsigned long flags;
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bool update_alsa = false;
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unsigned char *src, *dst;
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int status = req->status;
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struct uac2_req *ur = req->context;
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struct snd_pcm_substream *substream;
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struct uac2_rtd_params *prm = ur->pp;
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struct snd_uac2_chip *uac2 = prm_to_uac2(prm);
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/* i/f shutting down */
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if (!prm->ep_enabled)
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return;
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/*
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* We can't really do much about bad xfers.
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* Afterall, the ISOCH xfers could fail legitimately.
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*/
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if (status)
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pr_debug("%s: iso_complete status(%d) %d/%d\n",
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__func__, status, req->actual, req->length);
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substream = prm->ss;
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/* Do nothing if ALSA isn't active */
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if (!substream)
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goto exit;
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spin_lock_irqsave(&prm->lock, flags);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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src = prm->dma_area + prm->hw_ptr;
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req->actual = req->length;
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dst = req->buf;
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} else {
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dst = prm->dma_area + prm->hw_ptr;
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src = req->buf;
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}
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pending = prm->hw_ptr % prm->period_size;
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pending += req->actual;
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if (pending >= prm->period_size)
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update_alsa = true;
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prm->hw_ptr = (prm->hw_ptr + req->actual) % prm->dma_bytes;
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spin_unlock_irqrestore(&prm->lock, flags);
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/* Pack USB load in ALSA ring buffer */
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memcpy(dst, src, req->actual);
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exit:
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if (usb_ep_queue(ep, req, GFP_ATOMIC))
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dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__);
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if (update_alsa)
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snd_pcm_period_elapsed(substream);
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return;
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}
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static int
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uac2_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
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struct audio_dev *agdev = uac2_to_agdev(uac2);
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struct uac2_rtd_params *prm;
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unsigned long flags;
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struct usb_ep *ep;
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int err = 0;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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ep = agdev->in_ep;
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prm = &uac2->p_prm;
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} else {
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ep = agdev->out_ep;
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prm = &uac2->c_prm;
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}
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spin_lock_irqsave(&prm->lock, flags);
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/* Reset */
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prm->hw_ptr = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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prm->ss = substream;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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prm->ss = NULL;
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break;
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default:
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err = -EINVAL;
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}
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spin_unlock_irqrestore(&prm->lock, flags);
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/* Clear buffer after Play stops */
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !prm->ss)
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memset(prm->rbuf, 0, prm->max_psize * USB_XFERS);
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return err;
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}
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static snd_pcm_uframes_t uac2_pcm_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
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struct uac2_rtd_params *prm;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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prm = &uac2->p_prm;
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else
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prm = &uac2->c_prm;
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return bytes_to_frames(substream->runtime, prm->hw_ptr);
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}
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static int uac2_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
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struct uac2_rtd_params *prm;
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int err;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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prm = &uac2->p_prm;
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else
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prm = &uac2->c_prm;
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err = snd_pcm_lib_malloc_pages(substream,
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params_buffer_bytes(hw_params));
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if (err >= 0) {
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prm->dma_bytes = substream->runtime->dma_bytes;
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prm->dma_area = substream->runtime->dma_area;
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prm->period_size = params_period_bytes(hw_params);
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}
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return err;
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}
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static int uac2_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
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struct uac2_rtd_params *prm;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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prm = &uac2->p_prm;
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else
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prm = &uac2->c_prm;
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prm->dma_area = NULL;
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prm->dma_bytes = 0;
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prm->period_size = 0;
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return snd_pcm_lib_free_pages(substream);
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}
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static int uac2_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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runtime->hw = uac2_pcm_hardware;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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spin_lock_init(&uac2->p_prm.lock);
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runtime->hw.rate_min = p_srate;
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runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; /* ! p_ssize ! */
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runtime->hw.channels_min = num_channels(p_chmask);
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runtime->hw.period_bytes_min = 2 * uac2->p_prm.max_psize
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/ runtime->hw.periods_min;
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} else {
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spin_lock_init(&uac2->c_prm.lock);
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runtime->hw.rate_min = c_srate;
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runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; /* ! c_ssize ! */
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runtime->hw.channels_min = num_channels(c_chmask);
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runtime->hw.period_bytes_min = 2 * uac2->c_prm.max_psize
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/ runtime->hw.periods_min;
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}
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runtime->hw.rate_max = runtime->hw.rate_min;
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runtime->hw.channels_max = runtime->hw.channels_min;
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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return 0;
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}
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/* ALSA cries without these function pointers */
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static int uac2_pcm_null(struct snd_pcm_substream *substream)
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{
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return 0;
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}
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static struct snd_pcm_ops uac2_pcm_ops = {
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.open = uac2_pcm_open,
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.close = uac2_pcm_null,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = uac2_pcm_hw_params,
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.hw_free = uac2_pcm_hw_free,
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.trigger = uac2_pcm_trigger,
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.pointer = uac2_pcm_pointer,
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.prepare = uac2_pcm_null,
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};
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static int snd_uac2_probe(struct platform_device *pdev)
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{
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struct snd_uac2_chip *uac2 = pdev_to_uac2(pdev);
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struct snd_card *card;
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struct snd_pcm *pcm;
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int err;
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/* Choose any slot, with no id */
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err = snd_card_create(-1, NULL, THIS_MODULE, 0, &card);
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if (err < 0)
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return err;
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uac2->card = card;
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/*
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* Create first PCM device
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* Create a substream only for non-zero channel streams
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*/
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err = snd_pcm_new(uac2->card, "UAC2 PCM", 0,
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p_chmask ? 1 : 0, c_chmask ? 1 : 0, &pcm);
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if (err < 0)
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goto snd_fail;
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strcpy(pcm->name, "UAC2 PCM");
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pcm->private_data = uac2;
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uac2->pcm = pcm;
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &uac2_pcm_ops);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &uac2_pcm_ops);
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strcpy(card->driver, "UAC2_Gadget");
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strcpy(card->shortname, "UAC2_Gadget");
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sprintf(card->longname, "UAC2_Gadget %i", pdev->id);
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snd_card_set_dev(card, &pdev->dev);
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snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
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snd_dma_continuous_data(GFP_KERNEL), 0, BUFF_SIZE_MAX);
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err = snd_card_register(card);
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if (!err) {
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platform_set_drvdata(pdev, card);
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return 0;
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}
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snd_fail:
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snd_card_free(card);
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uac2->pcm = NULL;
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uac2->card = NULL;
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return err;
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}
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static int snd_uac2_remove(struct platform_device *pdev)
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{
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struct snd_card *card = platform_get_drvdata(pdev);
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platform_set_drvdata(pdev, NULL);
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if (card)
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return snd_card_free(card);
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return 0;
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}
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static int alsa_uac2_init(struct audio_dev *agdev)
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{
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struct snd_uac2_chip *uac2 = &agdev->uac2;
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int err;
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uac2->pdrv.probe = snd_uac2_probe;
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uac2->pdrv.remove = snd_uac2_remove;
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uac2->pdrv.driver.name = uac2_name;
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uac2->pdev.id = 0;
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uac2->pdev.name = uac2_name;
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|
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/* Register snd_uac2 driver */
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err = platform_driver_register(&uac2->pdrv);
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if (err)
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return err;
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|
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/* Register snd_uac2 device */
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err = platform_device_register(&uac2->pdev);
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if (err)
|
|
platform_driver_unregister(&uac2->pdrv);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void alsa_uac2_exit(struct audio_dev *agdev)
|
|
{
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
|
|
platform_driver_unregister(&uac2->pdrv);
|
|
platform_device_unregister(&uac2->pdev);
|
|
}
|
|
|
|
|
|
/* --------- USB Function Interface ------------- */
|
|
|
|
enum {
|
|
STR_ASSOC,
|
|
STR_IF_CTRL,
|
|
STR_CLKSRC_IN,
|
|
STR_CLKSRC_OUT,
|
|
STR_USB_IT,
|
|
STR_IO_IT,
|
|
STR_USB_OT,
|
|
STR_IO_OT,
|
|
STR_AS_OUT_ALT0,
|
|
STR_AS_OUT_ALT1,
|
|
STR_AS_IN_ALT0,
|
|
STR_AS_IN_ALT1,
|
|
};
|
|
|
|
static char clksrc_in[8];
|
|
static char clksrc_out[8];
|
|
|
|
static struct usb_string strings_fn[] = {
|
|
[STR_ASSOC].s = "Source/Sink",
|
|
[STR_IF_CTRL].s = "Topology Control",
|
|
[STR_CLKSRC_IN].s = clksrc_in,
|
|
[STR_CLKSRC_OUT].s = clksrc_out,
|
|
[STR_USB_IT].s = "USBH Out",
|
|
[STR_IO_IT].s = "USBD Out",
|
|
[STR_USB_OT].s = "USBH In",
|
|
[STR_IO_OT].s = "USBD In",
|
|
[STR_AS_OUT_ALT0].s = "Playback Inactive",
|
|
[STR_AS_OUT_ALT1].s = "Playback Active",
|
|
[STR_AS_IN_ALT0].s = "Capture Inactive",
|
|
[STR_AS_IN_ALT1].s = "Capture Active",
|
|
{ },
|
|
};
|
|
|
|
static struct usb_gadget_strings str_fn = {
|
|
.language = 0x0409, /* en-us */
|
|
.strings = strings_fn,
|
|
};
|
|
|
|
static struct usb_gadget_strings *fn_strings[] = {
|
|
&str_fn,
|
|
NULL,
|
|
};
|
|
|
|
static struct usb_qualifier_descriptor devqual_desc = {
|
|
.bLength = sizeof devqual_desc,
|
|
.bDescriptorType = USB_DT_DEVICE_QUALIFIER,
|
|
|
|
.bcdUSB = cpu_to_le16(0x200),
|
|
.bDeviceClass = USB_CLASS_MISC,
|
|
.bDeviceSubClass = 0x02,
|
|
.bDeviceProtocol = 0x01,
|
|
.bNumConfigurations = 1,
|
|
.bRESERVED = 0,
|
|
};
|
|
|
|
static struct usb_interface_assoc_descriptor iad_desc = {
|
|
.bLength = sizeof iad_desc,
|
|
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
|
|
|
|
.bFirstInterface = 0,
|
|
.bInterfaceCount = 3,
|
|
.bFunctionClass = USB_CLASS_AUDIO,
|
|
.bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED,
|
|
.bFunctionProtocol = UAC_VERSION_2,
|
|
};
|
|
|
|
/* Audio Control Interface */
|
|
static struct usb_interface_descriptor std_ac_if_desc = {
|
|
.bLength = sizeof std_ac_if_desc,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 0,
|
|
.bInterfaceClass = USB_CLASS_AUDIO,
|
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
|
|
.bInterfaceProtocol = UAC_VERSION_2,
|
|
};
|
|
|
|
/* Clock source for IN traffic */
|
|
struct uac_clock_source_descriptor in_clk_src_desc = {
|
|
.bLength = sizeof in_clk_src_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC2_CLOCK_SOURCE,
|
|
.bClockID = USB_IN_CLK_ID,
|
|
.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
|
|
.bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
|
|
.bAssocTerminal = 0,
|
|
};
|
|
|
|
/* Clock source for OUT traffic */
|
|
struct uac_clock_source_descriptor out_clk_src_desc = {
|
|
.bLength = sizeof out_clk_src_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC2_CLOCK_SOURCE,
|
|
.bClockID = USB_OUT_CLK_ID,
|
|
.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
|
|
.bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
|
|
.bAssocTerminal = 0,
|
|
};
|
|
|
|
/* Input Terminal for USB_OUT */
|
|
struct uac2_input_terminal_descriptor usb_out_it_desc = {
|
|
.bLength = sizeof usb_out_it_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC_INPUT_TERMINAL,
|
|
.bTerminalID = USB_OUT_IT_ID,
|
|
.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
|
|
.bAssocTerminal = 0,
|
|
.bCSourceID = USB_OUT_CLK_ID,
|
|
.iChannelNames = 0,
|
|
.bmControls = (CONTROL_RDWR << COPY_CTRL),
|
|
};
|
|
|
|
/* Input Terminal for I/O-In */
|
|
struct uac2_input_terminal_descriptor io_in_it_desc = {
|
|
.bLength = sizeof io_in_it_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC_INPUT_TERMINAL,
|
|
.bTerminalID = IO_IN_IT_ID,
|
|
.wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED),
|
|
.bAssocTerminal = 0,
|
|
.bCSourceID = USB_IN_CLK_ID,
|
|
.iChannelNames = 0,
|
|
.bmControls = (CONTROL_RDWR << COPY_CTRL),
|
|
};
|
|
|
|
/* Ouput Terminal for USB_IN */
|
|
struct uac2_output_terminal_descriptor usb_in_ot_desc = {
|
|
.bLength = sizeof usb_in_ot_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
|
|
.bTerminalID = USB_IN_OT_ID,
|
|
.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
|
|
.bAssocTerminal = 0,
|
|
.bSourceID = IO_IN_IT_ID,
|
|
.bCSourceID = USB_IN_CLK_ID,
|
|
.bmControls = (CONTROL_RDWR << COPY_CTRL),
|
|
};
|
|
|
|
/* Ouput Terminal for I/O-Out */
|
|
struct uac2_output_terminal_descriptor io_out_ot_desc = {
|
|
.bLength = sizeof io_out_ot_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
|
|
.bTerminalID = IO_OUT_OT_ID,
|
|
.wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED),
|
|
.bAssocTerminal = 0,
|
|
.bSourceID = USB_OUT_IT_ID,
|
|
.bCSourceID = USB_OUT_CLK_ID,
|
|
.bmControls = (CONTROL_RDWR << COPY_CTRL),
|
|
};
|
|
|
|
struct uac2_ac_header_descriptor ac_hdr_desc = {
|
|
.bLength = sizeof ac_hdr_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC_MS_HEADER,
|
|
.bcdADC = cpu_to_le16(0x200),
|
|
.bCategory = UAC2_FUNCTION_IO_BOX,
|
|
.wTotalLength = sizeof in_clk_src_desc + sizeof out_clk_src_desc
|
|
+ sizeof usb_out_it_desc + sizeof io_in_it_desc
|
|
+ sizeof usb_in_ot_desc + sizeof io_out_ot_desc,
|
|
.bmControls = 0,
|
|
};
|
|
|
|
/* Audio Streaming OUT Interface - Alt0 */
|
|
static struct usb_interface_descriptor std_as_out_if0_desc = {
|
|
.bLength = sizeof std_as_out_if0_desc,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 0,
|
|
.bInterfaceClass = USB_CLASS_AUDIO,
|
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
|
|
.bInterfaceProtocol = UAC_VERSION_2,
|
|
};
|
|
|
|
/* Audio Streaming OUT Interface - Alt1 */
|
|
static struct usb_interface_descriptor std_as_out_if1_desc = {
|
|
.bLength = sizeof std_as_out_if1_desc,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bAlternateSetting = 1,
|
|
.bNumEndpoints = 1,
|
|
.bInterfaceClass = USB_CLASS_AUDIO,
|
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
|
|
.bInterfaceProtocol = UAC_VERSION_2,
|
|
};
|
|
|
|
/* Audio Stream OUT Intface Desc */
|
|
struct uac2_as_header_descriptor as_out_hdr_desc = {
|
|
.bLength = sizeof as_out_hdr_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC_AS_GENERAL,
|
|
.bTerminalLink = USB_OUT_IT_ID,
|
|
.bmControls = 0,
|
|
.bFormatType = UAC_FORMAT_TYPE_I,
|
|
.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
|
|
.iChannelNames = 0,
|
|
};
|
|
|
|
/* Audio USB_OUT Format */
|
|
struct uac2_format_type_i_descriptor as_out_fmt1_desc = {
|
|
.bLength = sizeof as_out_fmt1_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubtype = UAC_FORMAT_TYPE,
|
|
.bFormatType = UAC_FORMAT_TYPE_I,
|
|
};
|
|
|
|
/* STD AS ISO OUT Endpoint */
|
|
struct usb_endpoint_descriptor fs_epout_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_OUT,
|
|
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
|
|
.bInterval = 1,
|
|
};
|
|
|
|
struct usb_endpoint_descriptor hs_epout_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
|
|
.bInterval = 4,
|
|
};
|
|
|
|
/* CS AS ISO OUT Endpoint */
|
|
static struct uac2_iso_endpoint_descriptor as_iso_out_desc = {
|
|
.bLength = sizeof as_iso_out_desc,
|
|
.bDescriptorType = USB_DT_CS_ENDPOINT,
|
|
|
|
.bDescriptorSubtype = UAC_EP_GENERAL,
|
|
.bmAttributes = 0,
|
|
.bmControls = 0,
|
|
.bLockDelayUnits = 0,
|
|
.wLockDelay = 0,
|
|
};
|
|
|
|
/* Audio Streaming IN Interface - Alt0 */
|
|
static struct usb_interface_descriptor std_as_in_if0_desc = {
|
|
.bLength = sizeof std_as_in_if0_desc,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 0,
|
|
.bInterfaceClass = USB_CLASS_AUDIO,
|
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
|
|
.bInterfaceProtocol = UAC_VERSION_2,
|
|
};
|
|
|
|
/* Audio Streaming IN Interface - Alt1 */
|
|
static struct usb_interface_descriptor std_as_in_if1_desc = {
|
|
.bLength = sizeof std_as_in_if1_desc,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bAlternateSetting = 1,
|
|
.bNumEndpoints = 1,
|
|
.bInterfaceClass = USB_CLASS_AUDIO,
|
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
|
|
.bInterfaceProtocol = UAC_VERSION_2,
|
|
};
|
|
|
|
/* Audio Stream IN Intface Desc */
|
|
struct uac2_as_header_descriptor as_in_hdr_desc = {
|
|
.bLength = sizeof as_in_hdr_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
|
|
.bDescriptorSubtype = UAC_AS_GENERAL,
|
|
.bTerminalLink = USB_IN_OT_ID,
|
|
.bmControls = 0,
|
|
.bFormatType = UAC_FORMAT_TYPE_I,
|
|
.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
|
|
.iChannelNames = 0,
|
|
};
|
|
|
|
/* Audio USB_IN Format */
|
|
struct uac2_format_type_i_descriptor as_in_fmt1_desc = {
|
|
.bLength = sizeof as_in_fmt1_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubtype = UAC_FORMAT_TYPE,
|
|
.bFormatType = UAC_FORMAT_TYPE_I,
|
|
};
|
|
|
|
/* STD AS ISO IN Endpoint */
|
|
struct usb_endpoint_descriptor fs_epin_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_IN,
|
|
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
|
|
.bInterval = 1,
|
|
};
|
|
|
|
struct usb_endpoint_descriptor hs_epin_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
|
|
.bInterval = 4,
|
|
};
|
|
|
|
/* CS AS ISO IN Endpoint */
|
|
static struct uac2_iso_endpoint_descriptor as_iso_in_desc = {
|
|
.bLength = sizeof as_iso_in_desc,
|
|
.bDescriptorType = USB_DT_CS_ENDPOINT,
|
|
|
|
.bDescriptorSubtype = UAC_EP_GENERAL,
|
|
.bmAttributes = 0,
|
|
.bmControls = 0,
|
|
.bLockDelayUnits = 0,
|
|
.wLockDelay = 0,
|
|
};
|
|
|
|
static struct usb_descriptor_header *fs_audio_desc[] = {
|
|
(struct usb_descriptor_header *)&iad_desc,
|
|
(struct usb_descriptor_header *)&std_ac_if_desc,
|
|
|
|
(struct usb_descriptor_header *)&ac_hdr_desc,
|
|
(struct usb_descriptor_header *)&in_clk_src_desc,
|
|
(struct usb_descriptor_header *)&out_clk_src_desc,
|
|
(struct usb_descriptor_header *)&usb_out_it_desc,
|
|
(struct usb_descriptor_header *)&io_in_it_desc,
|
|
(struct usb_descriptor_header *)&usb_in_ot_desc,
|
|
(struct usb_descriptor_header *)&io_out_ot_desc,
|
|
|
|
(struct usb_descriptor_header *)&std_as_out_if0_desc,
|
|
(struct usb_descriptor_header *)&std_as_out_if1_desc,
|
|
|
|
(struct usb_descriptor_header *)&as_out_hdr_desc,
|
|
(struct usb_descriptor_header *)&as_out_fmt1_desc,
|
|
(struct usb_descriptor_header *)&fs_epout_desc,
|
|
(struct usb_descriptor_header *)&as_iso_out_desc,
|
|
|
|
(struct usb_descriptor_header *)&std_as_in_if0_desc,
|
|
(struct usb_descriptor_header *)&std_as_in_if1_desc,
|
|
|
|
(struct usb_descriptor_header *)&as_in_hdr_desc,
|
|
(struct usb_descriptor_header *)&as_in_fmt1_desc,
|
|
(struct usb_descriptor_header *)&fs_epin_desc,
|
|
(struct usb_descriptor_header *)&as_iso_in_desc,
|
|
NULL,
|
|
};
|
|
|
|
static struct usb_descriptor_header *hs_audio_desc[] = {
|
|
(struct usb_descriptor_header *)&iad_desc,
|
|
(struct usb_descriptor_header *)&std_ac_if_desc,
|
|
|
|
(struct usb_descriptor_header *)&ac_hdr_desc,
|
|
(struct usb_descriptor_header *)&in_clk_src_desc,
|
|
(struct usb_descriptor_header *)&out_clk_src_desc,
|
|
(struct usb_descriptor_header *)&usb_out_it_desc,
|
|
(struct usb_descriptor_header *)&io_in_it_desc,
|
|
(struct usb_descriptor_header *)&usb_in_ot_desc,
|
|
(struct usb_descriptor_header *)&io_out_ot_desc,
|
|
|
|
(struct usb_descriptor_header *)&std_as_out_if0_desc,
|
|
(struct usb_descriptor_header *)&std_as_out_if1_desc,
|
|
|
|
(struct usb_descriptor_header *)&as_out_hdr_desc,
|
|
(struct usb_descriptor_header *)&as_out_fmt1_desc,
|
|
(struct usb_descriptor_header *)&hs_epout_desc,
|
|
(struct usb_descriptor_header *)&as_iso_out_desc,
|
|
|
|
(struct usb_descriptor_header *)&std_as_in_if0_desc,
|
|
(struct usb_descriptor_header *)&std_as_in_if1_desc,
|
|
|
|
(struct usb_descriptor_header *)&as_in_hdr_desc,
|
|
(struct usb_descriptor_header *)&as_in_fmt1_desc,
|
|
(struct usb_descriptor_header *)&hs_epin_desc,
|
|
(struct usb_descriptor_header *)&as_iso_in_desc,
|
|
NULL,
|
|
};
|
|
|
|
struct cntrl_cur_lay3 {
|
|
__u32 dCUR;
|
|
};
|
|
|
|
struct cntrl_range_lay3 {
|
|
__u16 wNumSubRanges;
|
|
__u32 dMIN;
|
|
__u32 dMAX;
|
|
__u32 dRES;
|
|
} __packed;
|
|
|
|
static inline void
|
|
free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep)
|
|
{
|
|
struct snd_uac2_chip *uac2 = prm_to_uac2(prm);
|
|
int i;
|
|
|
|
prm->ep_enabled = false;
|
|
|
|
for (i = 0; i < USB_XFERS; i++) {
|
|
if (prm->ureq[i].req) {
|
|
usb_ep_dequeue(ep, prm->ureq[i].req);
|
|
usb_ep_free_request(ep, prm->ureq[i].req);
|
|
prm->ureq[i].req = NULL;
|
|
}
|
|
}
|
|
|
|
if (usb_ep_disable(ep))
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
}
|
|
|
|
static int __init
|
|
afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
|
|
{
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
struct usb_composite_dev *cdev = cfg->cdev;
|
|
struct usb_gadget *gadget = cdev->gadget;
|
|
struct uac2_rtd_params *prm;
|
|
int ret;
|
|
|
|
ret = usb_interface_id(cfg, fn);
|
|
if (ret < 0) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return ret;
|
|
}
|
|
std_ac_if_desc.bInterfaceNumber = ret;
|
|
agdev->ac_intf = ret;
|
|
agdev->ac_alt = 0;
|
|
|
|
ret = usb_interface_id(cfg, fn);
|
|
if (ret < 0) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return ret;
|
|
}
|
|
std_as_out_if0_desc.bInterfaceNumber = ret;
|
|
std_as_out_if1_desc.bInterfaceNumber = ret;
|
|
agdev->as_out_intf = ret;
|
|
agdev->as_out_alt = 0;
|
|
|
|
ret = usb_interface_id(cfg, fn);
|
|
if (ret < 0) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return ret;
|
|
}
|
|
std_as_in_if0_desc.bInterfaceNumber = ret;
|
|
std_as_in_if1_desc.bInterfaceNumber = ret;
|
|
agdev->as_in_intf = ret;
|
|
agdev->as_in_alt = 0;
|
|
|
|
agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
|
|
if (!agdev->out_ep) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
goto err;
|
|
}
|
|
agdev->out_ep->driver_data = agdev;
|
|
|
|
agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
|
|
if (!agdev->in_ep) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
goto err;
|
|
}
|
|
agdev->in_ep->driver_data = agdev;
|
|
|
|
hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
|
|
hs_epout_desc.wMaxPacketSize = fs_epout_desc.wMaxPacketSize;
|
|
hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
|
|
hs_epin_desc.wMaxPacketSize = fs_epin_desc.wMaxPacketSize;
|
|
|
|
ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL);
|
|
if (ret)
|
|
goto err;
|
|
|
|
prm = &agdev->uac2.c_prm;
|
|
prm->max_psize = hs_epout_desc.wMaxPacketSize;
|
|
prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
|
|
if (!prm->rbuf) {
|
|
prm->max_psize = 0;
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
goto err;
|
|
}
|
|
|
|
prm = &agdev->uac2.p_prm;
|
|
prm->max_psize = hs_epin_desc.wMaxPacketSize;
|
|
prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
|
|
if (!prm->rbuf) {
|
|
prm->max_psize = 0;
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
goto err;
|
|
}
|
|
|
|
ret = alsa_uac2_init(agdev);
|
|
if (ret)
|
|
goto err;
|
|
return 0;
|
|
err:
|
|
kfree(agdev->uac2.p_prm.rbuf);
|
|
kfree(agdev->uac2.c_prm.rbuf);
|
|
usb_free_all_descriptors(fn);
|
|
if (agdev->in_ep)
|
|
agdev->in_ep->driver_data = NULL;
|
|
if (agdev->out_ep)
|
|
agdev->out_ep->driver_data = NULL;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void
|
|
afunc_unbind(struct usb_configuration *cfg, struct usb_function *fn)
|
|
{
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct uac2_rtd_params *prm;
|
|
|
|
alsa_uac2_exit(agdev);
|
|
|
|
prm = &agdev->uac2.p_prm;
|
|
kfree(prm->rbuf);
|
|
|
|
prm = &agdev->uac2.c_prm;
|
|
kfree(prm->rbuf);
|
|
usb_free_all_descriptors(fn);
|
|
|
|
if (agdev->in_ep)
|
|
agdev->in_ep->driver_data = NULL;
|
|
if (agdev->out_ep)
|
|
agdev->out_ep->driver_data = NULL;
|
|
}
|
|
|
|
static int
|
|
afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
|
|
{
|
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
struct usb_gadget *gadget = cdev->gadget;
|
|
struct usb_request *req;
|
|
struct usb_ep *ep;
|
|
struct uac2_rtd_params *prm;
|
|
int i;
|
|
|
|
/* No i/f has more than 2 alt settings */
|
|
if (alt > 1) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (intf == agdev->ac_intf) {
|
|
/* Control I/f has only 1 AltSetting - 0 */
|
|
if (alt) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (intf == agdev->as_out_intf) {
|
|
ep = agdev->out_ep;
|
|
prm = &uac2->c_prm;
|
|
config_ep_by_speed(gadget, fn, ep);
|
|
agdev->as_out_alt = alt;
|
|
} else if (intf == agdev->as_in_intf) {
|
|
ep = agdev->in_ep;
|
|
prm = &uac2->p_prm;
|
|
config_ep_by_speed(gadget, fn, ep);
|
|
agdev->as_in_alt = alt;
|
|
} else {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (alt == 0) {
|
|
free_ep(prm, ep);
|
|
return 0;
|
|
}
|
|
|
|
prm->ep_enabled = true;
|
|
usb_ep_enable(ep);
|
|
|
|
for (i = 0; i < USB_XFERS; i++) {
|
|
if (prm->ureq[i].req) {
|
|
if (usb_ep_queue(ep, prm->ureq[i].req, GFP_ATOMIC))
|
|
dev_err(&uac2->pdev.dev, "%d Error!\n",
|
|
__LINE__);
|
|
continue;
|
|
}
|
|
|
|
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
|
|
if (req == NULL) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
prm->ureq[i].req = req;
|
|
prm->ureq[i].pp = prm;
|
|
|
|
req->zero = 0;
|
|
req->context = &prm->ureq[i];
|
|
req->length = prm->max_psize;
|
|
req->complete = agdev_iso_complete;
|
|
req->buf = prm->rbuf + i * req->length;
|
|
|
|
if (usb_ep_queue(ep, req, GFP_ATOMIC))
|
|
dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
afunc_get_alt(struct usb_function *fn, unsigned intf)
|
|
{
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
|
|
if (intf == agdev->ac_intf)
|
|
return agdev->ac_alt;
|
|
else if (intf == agdev->as_out_intf)
|
|
return agdev->as_out_alt;
|
|
else if (intf == agdev->as_in_intf)
|
|
return agdev->as_in_alt;
|
|
else
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Invalid Interface %d!\n",
|
|
__func__, __LINE__, intf);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void
|
|
afunc_disable(struct usb_function *fn)
|
|
{
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
|
|
free_ep(&uac2->p_prm, agdev->in_ep);
|
|
agdev->as_in_alt = 0;
|
|
|
|
free_ep(&uac2->c_prm, agdev->out_ep);
|
|
agdev->as_out_alt = 0;
|
|
}
|
|
|
|
static int
|
|
in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct usb_request *req = fn->config->cdev->req;
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
u16 w_length = le16_to_cpu(cr->wLength);
|
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
|
u16 w_value = le16_to_cpu(cr->wValue);
|
|
u8 entity_id = (w_index >> 8) & 0xff;
|
|
u8 control_selector = w_value >> 8;
|
|
int value = -EOPNOTSUPP;
|
|
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
|
|
struct cntrl_cur_lay3 c;
|
|
|
|
if (entity_id == USB_IN_CLK_ID)
|
|
c.dCUR = p_srate;
|
|
else if (entity_id == USB_OUT_CLK_ID)
|
|
c.dCUR = c_srate;
|
|
|
|
value = min_t(unsigned, w_length, sizeof c);
|
|
memcpy(req->buf, &c, value);
|
|
} else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
|
|
*(u8 *)req->buf = 1;
|
|
value = min_t(unsigned, w_length, 1);
|
|
} else {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, control_selector);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static int
|
|
in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct usb_request *req = fn->config->cdev->req;
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
u16 w_length = le16_to_cpu(cr->wLength);
|
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
|
u16 w_value = le16_to_cpu(cr->wValue);
|
|
u8 entity_id = (w_index >> 8) & 0xff;
|
|
u8 control_selector = w_value >> 8;
|
|
struct cntrl_range_lay3 r;
|
|
int value = -EOPNOTSUPP;
|
|
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
|
|
if (entity_id == USB_IN_CLK_ID)
|
|
r.dMIN = p_srate;
|
|
else if (entity_id == USB_OUT_CLK_ID)
|
|
r.dMIN = c_srate;
|
|
else
|
|
return -EOPNOTSUPP;
|
|
|
|
r.dMAX = r.dMIN;
|
|
r.dRES = 0;
|
|
r.wNumSubRanges = 1;
|
|
|
|
value = min_t(unsigned, w_length, sizeof r);
|
|
memcpy(req->buf, &r, value);
|
|
} else {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, control_selector);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static int
|
|
ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
if (cr->bRequest == UAC2_CS_CUR)
|
|
return in_rq_cur(fn, cr);
|
|
else if (cr->bRequest == UAC2_CS_RANGE)
|
|
return in_rq_range(fn, cr);
|
|
else
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int
|
|
out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
u16 w_length = le16_to_cpu(cr->wLength);
|
|
u16 w_value = le16_to_cpu(cr->wValue);
|
|
u8 control_selector = w_value >> 8;
|
|
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ)
|
|
return w_length;
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int
|
|
setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
|
u8 intf = w_index & 0xff;
|
|
|
|
if (intf != agdev->ac_intf) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (cr->bRequestType & USB_DIR_IN)
|
|
return ac_rq_in(fn, cr);
|
|
else if (cr->bRequest == UAC2_CS_CUR)
|
|
return out_rq_cur(fn, cr);
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int
|
|
afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
|
struct audio_dev *agdev = func_to_agdev(fn);
|
|
struct snd_uac2_chip *uac2 = &agdev->uac2;
|
|
struct usb_request *req = cdev->req;
|
|
u16 w_length = le16_to_cpu(cr->wLength);
|
|
int value = -EOPNOTSUPP;
|
|
|
|
/* Only Class specific requests are supposed to reach here */
|
|
if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS)
|
|
return -EOPNOTSUPP;
|
|
|
|
if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE)
|
|
value = setup_rq_inf(fn, cr);
|
|
else
|
|
dev_err(&uac2->pdev.dev, "%s:%d Error!\n", __func__, __LINE__);
|
|
|
|
if (value >= 0) {
|
|
req->length = value;
|
|
req->zero = value < w_length;
|
|
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
|
|
if (value < 0) {
|
|
dev_err(&uac2->pdev.dev,
|
|
"%s:%d Error!\n", __func__, __LINE__);
|
|
req->status = 0;
|
|
}
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static int audio_bind_config(struct usb_configuration *cfg)
|
|
{
|
|
int res;
|
|
|
|
agdev_g = kzalloc(sizeof *agdev_g, GFP_KERNEL);
|
|
if (agdev_g == NULL) {
|
|
printk(KERN_ERR "Unable to allocate audio gadget\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
res = usb_string_ids_tab(cfg->cdev, strings_fn);
|
|
if (res)
|
|
return res;
|
|
iad_desc.iFunction = strings_fn[STR_ASSOC].id;
|
|
std_ac_if_desc.iInterface = strings_fn[STR_IF_CTRL].id;
|
|
in_clk_src_desc.iClockSource = strings_fn[STR_CLKSRC_IN].id;
|
|
out_clk_src_desc.iClockSource = strings_fn[STR_CLKSRC_OUT].id;
|
|
usb_out_it_desc.iTerminal = strings_fn[STR_USB_IT].id;
|
|
io_in_it_desc.iTerminal = strings_fn[STR_IO_IT].id;
|
|
usb_in_ot_desc.iTerminal = strings_fn[STR_USB_OT].id;
|
|
io_out_ot_desc.iTerminal = strings_fn[STR_IO_OT].id;
|
|
std_as_out_if0_desc.iInterface = strings_fn[STR_AS_OUT_ALT0].id;
|
|
std_as_out_if1_desc.iInterface = strings_fn[STR_AS_OUT_ALT1].id;
|
|
std_as_in_if0_desc.iInterface = strings_fn[STR_AS_IN_ALT0].id;
|
|
std_as_in_if1_desc.iInterface = strings_fn[STR_AS_IN_ALT1].id;
|
|
|
|
agdev_g->func.name = "uac2_func";
|
|
agdev_g->func.strings = fn_strings;
|
|
agdev_g->func.bind = afunc_bind;
|
|
agdev_g->func.unbind = afunc_unbind;
|
|
agdev_g->func.set_alt = afunc_set_alt;
|
|
agdev_g->func.get_alt = afunc_get_alt;
|
|
agdev_g->func.disable = afunc_disable;
|
|
agdev_g->func.setup = afunc_setup;
|
|
|
|
/* Initialize the configurable parameters */
|
|
usb_out_it_desc.bNrChannels = num_channels(c_chmask);
|
|
usb_out_it_desc.bmChannelConfig = cpu_to_le32(c_chmask);
|
|
io_in_it_desc.bNrChannels = num_channels(p_chmask);
|
|
io_in_it_desc.bmChannelConfig = cpu_to_le32(p_chmask);
|
|
as_out_hdr_desc.bNrChannels = num_channels(c_chmask);
|
|
as_out_hdr_desc.bmChannelConfig = cpu_to_le32(c_chmask);
|
|
as_in_hdr_desc.bNrChannels = num_channels(p_chmask);
|
|
as_in_hdr_desc.bmChannelConfig = cpu_to_le32(p_chmask);
|
|
as_out_fmt1_desc.bSubslotSize = c_ssize;
|
|
as_out_fmt1_desc.bBitResolution = c_ssize * 8;
|
|
as_in_fmt1_desc.bSubslotSize = p_ssize;
|
|
as_in_fmt1_desc.bBitResolution = p_ssize * 8;
|
|
|
|
snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", p_srate);
|
|
snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", c_srate);
|
|
|
|
res = usb_add_function(cfg, &agdev_g->func);
|
|
if (res < 0)
|
|
kfree(agdev_g);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
uac2_unbind_config(struct usb_configuration *cfg)
|
|
{
|
|
kfree(agdev_g);
|
|
agdev_g = NULL;
|
|
}
|