korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-16 08:44:21 +08:00
Code Issues Packages Projects Releases Wiki Activity

usb: renesas_usbhs: add usbhsh_is_running()

Browse Source 
It is possible to judge whether renesas_usbhs driver is running,
by checking attch irq mask.
This patch adds usbhsh_is_running() to check it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Kuninori Morimoto 2011-12-08 18:30:23 -08:00 committed by Felipe Balbi
parent 31e00fd116
commit b1930da088
1 changed files with 32 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/usb/renesas_usbhs/mod_host.c
View File

@ -190,6 +190,21 @@ static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
kfree(ureq);
}
/*
* status
*/
static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
{
/*
* we can decide some device is attached or not
* by checking mod.irq_attch
* see
* usbhsh_irq_attch()
* usbhsh_irq_dtch()
*/
return (hpriv->mod.irq_attch == NULL);
}
/*
* pipe control
*/
@ -900,6 +915,11 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
if (!usbhsh_is_running(hpriv)) {
ret = -EIO;
goto usbhsh_urb_enqueue_error_not_linked;
}
ret = usb_hcd_link_urb_to_ep(hcd, urb);
if (ret)
goto usbhsh_urb_enqueue_error_not_linked;
@ -1249,6 +1269,12 @@ static int usbhsh_irq_attch(struct usbhs_priv *priv,
* attch interrupt might happen infinitely on some device
* (on self power USB hub ?)
* disable it here.
*
* usbhsh_is_running() becomes effective
* according to this process.
* see
* usbhsh_is_running()
* usbhsh_urb_enqueue()
*/
hpriv->mod.irq_attch = NULL;
usbhs_irq_callback_update(priv, &hpriv->mod);
@ -1269,6 +1295,12 @@ static int usbhsh_irq_dtch(struct usbhs_priv *priv,
/*
* enable attch interrupt again
*
* usbhsh_is_running() becomes invalid
* according to this process.
* see
* usbhsh_is_running()
* usbhsh_urb_enqueue()
*/
hpriv->mod.irq_attch = usbhsh_irq_attch;
usbhs_irq_callback_update(priv, &hpriv->mod);