* Tony Lindgren <t...@atomide.com> [190916 01:21]:
> Let's just get rid of .set_vbus for omap2430 glue layer and let the PHY
> code handle VBUS with musb_set_vbus(). Note that in the follow-up patch
> we can completely remove omap2430_musb_set_vbus(), but let's do it in a
> separate patch as this change may actually turn out to be needed as a
> fix.
FYI, below is a quick take at dropping omap2430_musb_set_vbus(),
needs more testing though. I'm still seeing some errors on
disconnect with this one like:
VBUS_ERROR in b_idle (80, <SessEnd), retry #0, port1 00000100
Other than that, things seems to work just fine for host and
peripheral.
Regards,
Tony
8< -------------------From tony Mon Sep 17 00:00:00 2001
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -38,41 +38,6 @@ struct omap2430_glue {
static struct omap2430_glue *_glue;
-/*
- * HDRC controls CPEN, but beware current surges during device connect.
- * They can trigger transient overcurrent conditions that must be ignored.
- *
- * Note that we're skipping A_WAIT_VFALL -> A_IDLE and jumping right to B_IDLE
- * as set by musb_set_peripheral().
- */
-static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
-{
- struct usb_otg *otg = musb->xceiv->otg;
- int error;
-
- if (is_on) {
- switch (musb->xceiv->otg->state) {
- case OTG_STATE_A_IDLE:
- error = musb_set_host(musb);
- if (!error) {
- musb->xceiv->otg->state =
OTG_STATE_A_WAIT_VRISE;
- otg_set_vbus(otg, 1);
- }
- break;
- default:
- otg_set_vbus(otg, 1);
- break;
- }
- } else {
- error = musb_set_peripheral(musb);
- otg_set_vbus(otg, 0);
- }
-
- dev_dbg(musb->controller, "VBUS %s, devctl %02x\n",
- usb_otg_state_string(musb->xceiv->otg->state),
- musb_readb(musb->mregs, MUSB_DEVCTL));
-}
-
static inline void omap2430_low_level_exit(struct musb *musb)
{
u32 l;
@@ -112,27 +77,42 @@ static int omap2430_musb_mailbox(enum musb_vbus_id_status
status)
return 0;
}
+/*
+ * HDRC controls CPEN, but beware current surges during device connect.
+ * They can trigger transient overcurrent conditions that must be ignored.
+ *
+ * Note that we're skipping A_WAIT_VFALL -> A_IDLE and jumping right to B_IDLE
+ * as set by musb_set_peripheral().
+ */
static void omap_musb_set_mailbox(struct omap2430_glue *glue)
{
struct musb *musb = glue_to_musb(glue);
- struct musb_hdrc_platform_data *pdata =
- dev_get_platdata(musb->controller);
- struct omap_musb_board_data *data = pdata->board_data;
+ int error;
pm_runtime_get_sync(musb->controller);
+
+ dev_dbg(musb->controller, "VBUS %s, devctl %02x\n",
+ usb_otg_state_string(musb->xceiv->otg->state),
+ musb_readb(musb->mregs, MUSB_DEVCTL));
+
switch (glue->status) {
case MUSB_ID_GROUND:
dev_dbg(musb->controller, "ID GND\n");
switch (musb->xceiv->otg->state) {
+ case OTG_STATE_A_IDLE:
+ error = musb_set_host(musb);
+ if (error)
+ break;
+ musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
+ /* Fall through */
case OTG_STATE_A_WAIT_VRISE:
case OTG_STATE_A_WAIT_BCON:
case OTG_STATE_A_HOST:
- case OTG_STATE_A_IDLE:
/*
* On multiple ID ground interrupts just keep enabling
* VBUS. At least cpcap VBUS shuts down otherwise.
*/
- omap2430_musb_set_vbus(musb, 1);
+ otg_set_vbus(musb->xceiv->otg, 1);
break;
default:
musb->xceiv->otg->state = OTG_STATE_A_IDLE;
@@ -140,7 +120,7 @@ static void omap_musb_set_mailbox(struct omap2430_glue
*glue)
if (musb->gadget_driver) {
omap_control_usb_set_mode(glue->control_otghs,
USB_MODE_HOST);
- omap2430_musb_set_vbus(musb, 1);
+ otg_set_vbus(musb->xceiv->otg, 1);
}
break;
}
@@ -159,14 +139,10 @@ static void omap_musb_set_mailbox(struct omap2430_glue
*glue)
dev_dbg(musb->controller, "VBUS Disconnect\n");
musb->xceiv->last_event = USB_EVENT_NONE;
- if (musb->gadget_driver)
- omap2430_musb_set_vbus(musb, 0);
-
- if (data->interface_type == MUSB_INTERFACE_UTMI)
- otg_set_vbus(musb->xceiv->otg, 0);
-
+ otg_set_vbus(musb->xceiv->otg, 0);
omap_control_usb_set_mode(glue->control_otghs,
USB_MODE_DISCONNECT);
+ musb_set_peripheral(musb);
break;
default:
dev_dbg(musb->controller, "ID float\n");
--
2.23.0
