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authorHema HK <hemahk@ti.com>2011-02-17 12:06:10 +0530
committerFelipe Balbi <balbi@ti.com>2011-02-18 14:05:53 +0200
commit002eda1348788f623dc42231dcda5f591d753124 (patch)
tree144e7b97998994fb1c3c46cfa48e1996d84417b1
parent647b2d9c61fe9a842dd89eb01b5f01e9d437993c (diff)
downloadblackbird-op-linux-002eda1348788f623dc42231dcda5f591d753124.tar.gz
blackbird-op-linux-002eda1348788f623dc42231dcda5f591d753124.zip
usb: musb: OMAP4430: Fix usb device detection if connected during boot
OMAP4430 is embedded with UTMI PHY. This PHY does not support the OTG features like ID pin detection and VBUS detection. This function is exported to an external companion chip TWL6030. Software must retrieve the OTG HNP and SRP status from the TWL6030 and configure the bits inside the control module that drive the related USBOTGHS UTMI interface signals. It must also read back the UTMI signals needed to configure the TWL6030 OTG module. Can find more details in the TRM[1]. [1]:http://focus.ti.com/pdfs/wtbu/OMAP4430_ES2.0_Public_TRM_vJ.pdf In OMAP4430 musb driver VBUS and ID notifications are received from the transceiver driver. If the cable/device is connected during boot, notifications from transceiver driver will be missed till musb driver is loaded. Patch to configure the transceiver in the platform_enable/disable functions and enable the vbus in the gadget driver based on the last_event of the otg_transceiver. Signed-off-by: Hema HK <hemahk@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Paul Walmsley <paul@pwsan.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
-rw-r--r--drivers/usb/musb/musb_gadget.c4
-rw-r--r--drivers/usb/musb/omap2430.c53
2 files changed, 52 insertions, 5 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 0f59bf935c85..95fbaccb03e1 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1877,6 +1877,10 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
if (retval < 0) {
DBG(1, "add_hcd failed, %d\n", retval);
goto err2;
+
+ if ((musb->xceiv->last_event == USB_EVENT_ID)
+ && musb->xceiv->set_vbus)
+ otg_set_vbus(musb->xceiv, 1);
}
hcd->self.uses_pio_for_control = 1;
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index bb6e6cd330da..64cf2431c05e 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -328,16 +328,56 @@ static int omap2430_musb_init(struct musb *musb)
if (status)
DBG(1, "notification register failed\n");
- /* check whether cable is already connected */
- if (musb->xceiv->state ==OTG_STATE_B_IDLE)
- musb_otg_notifications(&musb->nb, 1,
- musb->xceiv->gadget);
-
setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
return 0;
}
+static void omap2430_musb_enable(struct musb *musb)
+{
+ u8 devctl;
+ unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+ struct device *dev = musb->controller;
+ struct musb_hdrc_platform_data *pdata = dev->platform_data;
+ struct omap_musb_board_data *data = pdata->board_data;
+
+ switch (musb->xceiv->last_event) {
+
+ case USB_EVENT_ID:
+ otg_init(musb->xceiv);
+ if (data->interface_type == MUSB_INTERFACE_UTMI) {
+ devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+ /* start the session */
+ devctl |= MUSB_DEVCTL_SESSION;
+ musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+ while (musb_readb(musb->mregs, MUSB_DEVCTL) &
+ MUSB_DEVCTL_BDEVICE) {
+ cpu_relax();
+
+ if (time_after(jiffies, timeout)) {
+ dev_err(musb->controller,
+ "configured as A device timeout");
+ break;
+ }
+ }
+ }
+ break;
+
+ case USB_EVENT_VBUS:
+ otg_init(musb->xceiv);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static void omap2430_musb_disable(struct musb *musb)
+{
+ if (musb->xceiv->last_event)
+ otg_shutdown(musb->xceiv);
+}
+
static int omap2430_musb_exit(struct musb *musb)
{
@@ -355,6 +395,9 @@ static const struct musb_platform_ops omap2430_ops = {
.try_idle = omap2430_musb_try_idle,
.set_vbus = omap2430_musb_set_vbus,
+
+ .enable = omap2430_musb_enable,
+ .disable = omap2430_musb_disable,
};
static u64 omap2430_dmamask = DMA_BIT_MASK(32);
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