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author | Ruslan Bilovol <ruslan.bilovol@gmail.com> | 2017-06-18 00:23:58 +0300 |
---|---|---|
committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-06-19 09:22:45 +0300 |
commit | 1fc4926d92b9515b44f35b339bab5d2ca474a723 (patch) | |
tree | 381bb1a6decd18bcfa862d7dcb0c968e58ba9434 /drivers/usb | |
parent | d423b9657f27c0e7de514a8bce8bb71a31a7549b (diff) | |
download | linux-1fc4926d92b9515b44f35b339bab5d2ca474a723.tar.bz2 |
usb: gadget: function: f_uac1: implement get_alt()
After commit 7e4da3fcf7c9 ("usb: gadget: composite:
Test get_alt() presence instead of set_alt()") f_uac1
function became broken because it doesn't have
get_alt() callback implementation and composite
framework never set altsetting 1 for audiostreaming
interface. On host site it looks like:
[424339.017711] 21:1:1: usb_set_interface failed (-32)
Since host can't set altsetting 1, it can't start
playing audio.
In order to fix it implemented get_alt along with
minor improvements (error conditions checking)
similar to what existing f_uac2 has.
Cc: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r-- | drivers/usb/gadget/function/f_uac1.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c index f2ac0cbc29a4..5dfc94b8e69a 100644 --- a/drivers/usb/gadget/function/f_uac1.c +++ b/drivers/usb/gadget/function/f_uac1.c @@ -277,6 +277,9 @@ static void f_audio_buffer_free(struct f_audio_buf *audio_buf) struct f_audio { struct gaudio card; + u8 ac_intf, ac_alt; + u8 as_intf, as_alt; + /* endpoints handle full and/or high speeds */ struct usb_ep *out_ep; @@ -586,7 +589,20 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) req_count = opts->req_count; audio_buf_size = opts->audio_buf_size; - if (intf == 1) { + /* No i/f has more than 2 alt settings */ + if (alt > 1) { + ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__); + return -EINVAL; + } + + if (intf == audio->ac_intf) { + /* Control I/f has only 1 AltSetting - 0 */ + if (alt) { + ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__); + return -EINVAL; + } + return 0; + } else if (intf == audio->as_intf) { if (alt == 1) { err = config_ep_by_speed(cdev->gadget, f, out_ep); if (err) @@ -631,11 +647,28 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) schedule_work(&audio->playback_work); } } + audio->as_alt = alt; } return err; } +static int f_audio_get_alt(struct usb_function *f, unsigned intf) +{ + struct f_audio *audio = func_to_audio(f); + struct usb_composite_dev *cdev = f->config->cdev; + + if (intf == audio->ac_intf) + return audio->ac_alt; + else if (intf == audio->as_intf) + return audio->as_alt; + else + ERROR(cdev, "%s:%d Invalid Interface %d!\n", + __func__, __LINE__, intf); + + return -EINVAL; +} + static void f_audio_disable(struct usb_function *f) { return; @@ -702,12 +735,16 @@ f_audio_bind(struct usb_configuration *c, struct usb_function *f) if (status < 0) goto fail; ac_interface_desc.bInterfaceNumber = status; + audio->ac_intf = status; + audio->ac_alt = 0; status = usb_interface_id(c, f); if (status < 0) goto fail; as_interface_alt_0_desc.bInterfaceNumber = status; as_interface_alt_1_desc.bInterfaceNumber = status; + audio->as_intf = status; + audio->as_alt = 0; status = -ENODEV; @@ -966,6 +1003,7 @@ static struct usb_function *f_audio_alloc(struct usb_function_instance *fi) audio->card.func.bind = f_audio_bind; audio->card.func.unbind = f_audio_unbind; audio->card.func.set_alt = f_audio_set_alt; + audio->card.func.get_alt = f_audio_get_alt; audio->card.func.setup = f_audio_setup; audio->card.func.disable = f_audio_disable; audio->card.func.free_func = f_audio_free; |