diff options
| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2011-12-09 06:30:23 +0400 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2011-12-13 15:06:28 +0400 |
| commit | b1930da08872f6e17b8cdca60ee9c7321a8b5b8c (patch) | |
| tree | 895a62a92958dcfaae8ed51aec789559c890a334 /drivers/usb/renesas_usbhs/mod_host.c | |
| parent | 31e00fd116cab296da2d12bc0b82a30a9fbdd681 (diff) | |
| download | linux-b1930da08872f6e17b8cdca60ee9c7321a8b5b8c.tar.xz | |
usb: renesas_usbhs: add usbhsh_is_running()
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>
Diffstat (limited to 'drivers/usb/renesas_usbhs/mod_host.c')
| -rw-r--r-- | drivers/usb/renesas_usbhs/mod_host.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c index c947d0aca9bf..28b2cb3a029a 100644 --- a/drivers/usb/renesas_usbhs/mod_host.c +++ b/drivers/usb/renesas_usbhs/mod_host.c @@ -191,6 +191,21 @@ static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv, } /* + * 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 */ static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv, @@ -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); |