From 7158b57a495635c04507d986117ae26b2eb5e4e5 Mon Sep 17 00:00:00 2001 From: Ruslan Bilovol Date: Sun, 18 Jun 2017 16:23:51 +0300 Subject: [PATCH] usb: gadget: f_uac2: remove platform driver/device creation Simplify f_uac2 by removing platform driver/device creation; use composite's usb_gadget device as parent for sound card and for debug prints. This removes extra layer of code without any functional change. Signed-off-by: Ruslan Bilovol Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_uac2.c | 107 +++++++-------------------- 1 file changed, 28 insertions(+), 79 deletions(-) diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c index 5a7ba058d947..f674bae17e8d 100644 --- a/drivers/usb/gadget/function/f_uac2.c +++ b/drivers/usb/gadget/function/f_uac2.c @@ -13,7 +13,6 @@ #include #include -#include #include #include @@ -51,8 +50,6 @@ #define UNFLW_CTRL 8 #define OVFLW_CTRL 10 -static const char *uac2_name = "snd_uac2"; - struct uac2_req { struct uac2_rtd_params *pp; /* parent param */ struct usb_request *req; @@ -81,9 +78,6 @@ struct uac2_rtd_params { }; struct snd_uac2_chip { - struct platform_device pdev; - struct platform_driver pdrv; - struct uac2_rtd_params p_prm; struct uac2_rtd_params c_prm; @@ -122,6 +116,7 @@ struct audio_dev { struct usb_ep *in_ep, *out_ep; struct usb_function func; + struct usb_gadget *gadget; /* The ALSA Sound Card it represents on the USB-Client side */ struct snd_uac2_chip uac2; @@ -139,12 +134,6 @@ struct audio_dev *uac2_to_agdev(struct snd_uac2_chip *u) return container_of(u, struct audio_dev, uac2); } -static inline -struct snd_uac2_chip *pdev_to_uac2(struct platform_device *p) -{ - return container_of(p, struct snd_uac2_chip, pdev); -} - static inline struct f_uac2_opts *agdev_to_uac2_opts(struct audio_dev *agdev) { @@ -254,7 +243,7 @@ agdev_iso_complete(struct usb_ep *ep, struct usb_request *req) exit: if (usb_ep_queue(ep, req, GFP_ATOMIC)) - dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__); + dev_err(uac2->card->dev, "%d Error!\n", __LINE__); if (update_alsa) snd_pcm_period_elapsed(substream); @@ -440,23 +429,22 @@ static struct snd_pcm_ops uac2_pcm_ops = { .prepare = uac2_pcm_null, }; -static int snd_uac2_probe(struct platform_device *pdev) +static int snd_uac2_probe(struct audio_dev *audio_dev) { - struct snd_uac2_chip *uac2 = pdev_to_uac2(pdev); + struct snd_uac2_chip *uac2 = &audio_dev->uac2; struct snd_card *card; struct snd_pcm *pcm; - struct audio_dev *audio_dev; struct f_uac2_opts *opts; int err; int p_chmask, c_chmask; - audio_dev = uac2_to_agdev(uac2); opts = container_of(audio_dev->func.fi, struct f_uac2_opts, func_inst); p_chmask = opts->p_chmask; c_chmask = opts->c_chmask; /* Choose any slot, with no id */ - err = snd_card_new(&pdev->dev, -1, NULL, THIS_MODULE, 0, &card); + err = snd_card_new(&audio_dev->gadget->dev, + -1, NULL, THIS_MODULE, 0, &card); if (err < 0) return err; @@ -481,16 +469,15 @@ static int snd_uac2_probe(struct platform_device *pdev) strcpy(card->driver, "UAC2_Gadget"); strcpy(card->shortname, "UAC2_Gadget"); - sprintf(card->longname, "UAC2_Gadget %i", pdev->id); + sprintf(card->longname, "UAC2_Gadget %i", card->dev->id); snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, snd_dma_continuous_data(GFP_KERNEL), 0, BUFF_SIZE_MAX); err = snd_card_register(card); - if (!err) { - platform_set_drvdata(pdev, card); + + if (!err) return 0; - } snd_fail: snd_card_free(card); @@ -501,9 +488,9 @@ snd_fail: return err; } -static int snd_uac2_remove(struct platform_device *pdev) +static int snd_uac2_remove(struct audio_dev *audio_dev) { - struct snd_card *card = platform_get_drvdata(pdev); + struct snd_card *card = audio_dev->uac2.card; if (card) return snd_card_free(card); @@ -511,45 +498,6 @@ static int snd_uac2_remove(struct platform_device *pdev) return 0; } -static void snd_uac2_release(struct device *dev) -{ - dev_dbg(dev, "releasing '%s'\n", dev_name(dev)); -} - -static int alsa_uac2_init(struct audio_dev *agdev) -{ - struct snd_uac2_chip *uac2 = &agdev->uac2; - int err; - - uac2->pdrv.probe = snd_uac2_probe; - uac2->pdrv.remove = snd_uac2_remove; - uac2->pdrv.driver.name = uac2_name; - - uac2->pdev.id = 0; - uac2->pdev.name = uac2_name; - uac2->pdev.dev.release = snd_uac2_release; - - /* Register snd_uac2 driver */ - err = platform_driver_register(&uac2->pdrv); - if (err) - return err; - - /* Register snd_uac2 device */ - err = platform_device_register(&uac2->pdev); - 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 ------------- */ @@ -960,7 +908,7 @@ free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep) } if (usb_ep_disable(ep)) - dev_err(&uac2->pdev.dev, + dev_err(uac2->card->dev, "%s:%d Error!\n", __func__, __LINE__); } @@ -994,7 +942,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) struct snd_uac2_chip *uac2 = &agdev->uac2; struct usb_composite_dev *cdev = cfg->cdev; struct usb_gadget *gadget = cdev->gadget; - struct device *dev = &uac2->pdev.dev; + struct device *dev = &gadget->dev; struct uac2_rtd_params *prm; struct f_uac2_opts *uac2_opts; struct usb_string *us; @@ -1094,6 +1042,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) if (ret) return ret; + agdev->gadget = gadget; + prm = &agdev->uac2.c_prm; prm->max_psize = hs_epout_desc.wMaxPacketSize; prm->ureq = kcalloc(uac2_opts->req_number, sizeof(struct uac2_req), @@ -1124,7 +1074,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) goto err_no_memory; } - ret = alsa_uac2_init(agdev); + ret = snd_uac2_probe(agdev); if (ret) goto err_no_memory; return 0; @@ -1136,6 +1086,7 @@ err_no_memory: kfree(agdev->uac2.c_prm.rbuf); err_free_descs: usb_free_all_descriptors(fn); + agdev->gadget = NULL; return ret; } @@ -1147,7 +1098,7 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) struct f_uac2_opts *opts = agdev_to_uac2_opts(agdev); struct snd_uac2_chip *uac2 = &agdev->uac2; struct usb_gadget *gadget = cdev->gadget; - struct device *dev = &uac2->pdev.dev; + struct device *dev = &gadget->dev; struct usb_request *req; struct usb_ep *ep; struct uac2_rtd_params *prm; @@ -1247,7 +1198,6 @@ 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; @@ -1256,7 +1206,7 @@ afunc_get_alt(struct usb_function *fn, unsigned intf) else if (intf == agdev->as_in_intf) return agdev->as_in_alt; else - dev_err(&uac2->pdev.dev, + dev_err(&agdev->gadget->dev, "%s:%d Invalid Interface %d!\n", __func__, __LINE__, intf); @@ -1281,7 +1231,6 @@ 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; struct f_uac2_opts *opts; u16 w_length = le16_to_cpu(cr->wLength); u16 w_index = le16_to_cpu(cr->wIndex); @@ -1310,7 +1259,7 @@ in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) *(u8 *)req->buf = 1; value = min_t(unsigned, w_length, 1); } else { - dev_err(&uac2->pdev.dev, + dev_err(&agdev->gadget->dev, "%s:%d control_selector=%d TODO!\n", __func__, __LINE__, control_selector); } @@ -1323,7 +1272,6 @@ 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; struct f_uac2_opts *opts; u16 w_length = le16_to_cpu(cr->wLength); u16 w_index = le16_to_cpu(cr->wIndex); @@ -1353,7 +1301,7 @@ in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) value = min_t(unsigned, w_length, sizeof r); memcpy(req->buf, &r, value); } else { - dev_err(&uac2->pdev.dev, + dev_err(&agdev->gadget->dev, "%s:%d control_selector=%d TODO!\n", __func__, __LINE__, control_selector); } @@ -1389,12 +1337,11 @@ 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, + dev_err(&agdev->gadget->dev, "%s:%d Error!\n", __func__, __LINE__); return -EOPNOTSUPP; } @@ -1412,7 +1359,6 @@ 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; @@ -1424,14 +1370,15 @@ afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) 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__); + dev_err(&agdev->gadget->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, + dev_err(&agdev->gadget->dev, "%s:%d Error!\n", __func__, __LINE__); req->status = 0; } @@ -1573,7 +1520,7 @@ static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) struct audio_dev *agdev = func_to_agdev(f); struct uac2_rtd_params *prm; - alsa_uac2_exit(agdev); + snd_uac2_remove(agdev); prm = &agdev->uac2.p_prm; kfree(prm->rbuf); @@ -1582,6 +1529,8 @@ static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) kfree(prm->rbuf); kfree(prm->ureq); usb_free_all_descriptors(f); + + agdev->gadget = NULL; } static struct usb_function *afunc_alloc(struct usb_function_instance *fi) -- 2.20.1