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usb: dwc2: add support for external vbus supply

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Some board do not use the dwc2 internal VBUS_DRV signal, but
use a gpio pin to enable the 5.0V VBUS power, add interface to
enable the power in dwc2 driver.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Kever Yang 2017-03-10 12:05:14 +08:00 committed by Marek Vasut
parent 40a808f173
commit 5c73536738
1 changed files with 38 additions and 5 deletions
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43
drivers/usb/host/dwc2.c
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@ -15,6 +15,7 @@
#include <usbroothubdes.h>
#include <wait_bit.h>
#include <asm/io.h>
#include <power/regulator.h>
#include "dwc2.h"
@ -159,6 +160,33 @@ static void dwc_otg_core_reset(struct dwc2_core_regs *regs)
mdelay(100);
}
#if defined(CONFIG_DM_USB) && defined(CONFIG_DM_REGULATOR)
static int dwc_vbus_supply_init(struct udevice *dev)
{
struct udevice *vbus_supply;
int ret;
ret = device_get_supply_regulator(dev, "vbus-supply", &vbus_supply);
if (ret) {
debug("%s: No vbus supply\n", dev->name);
return 0;
}
ret = regulator_set_enable(vbus_supply, true);
if (ret) {
error("Error enabling vbus supply\n");
return ret;
}
return 0;
}
#else
static int dwc_vbus_supply_init(struct udevice *dev)
{
return 0;
}
#endif
/*
* This function initializes the DWC_otg controller registers for
* host mode.
@ -167,10 +195,12 @@ static void dwc_otg_core_reset(struct dwc2_core_regs *regs)
* request queues. Host channels are reset to ensure that they are ready for
* performing transfers.
*
* @param dev USB Device (NULL if driver model is not being used)
* @param regs Programming view of DWC_otg controller
*
*/
static void dwc_otg_core_host_init(struct dwc2_core_regs *regs)
static void dwc_otg_core_host_init(struct udevice *dev,
struct dwc2_core_regs *regs)
{
uint32_t nptxfifosize = 0;
uint32_t ptxfifosize = 0;
@ -248,6 +278,9 @@ static void dwc_otg_core_host_init(struct dwc2_core_regs *regs)
writel(hprt0, &regs->hprt0);
}
}
if (dev)
dwc_vbus_supply_init(dev);
}
/*
@ -1048,7 +1081,7 @@ int _submit_int_msg(struct dwc2_priv *priv, struct usb_device *dev,
}
}
static int dwc2_init_common(struct dwc2_priv *priv)
static int dwc2_init_common(struct udevice *dev, struct dwc2_priv *priv)
{
struct dwc2_core_regs *regs = priv->regs;
uint32_t snpsid;
@ -1070,7 +1103,7 @@ static int dwc2_init_common(struct dwc2_priv *priv)
#endif
dwc_otg_core_init(priv);
dwc_otg_core_host_init(regs);
dwc_otg_core_host_init(dev, regs);
clrsetbits_le32(&regs->hprt0, DWC2_HPRT0_PRTENA |
DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG |
@ -1143,7 +1176,7 @@ int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
if (board_usb_init(index, USB_INIT_HOST))
return -1;
return dwc2_init_common(priv);
return dwc2_init_common(NULL, priv);
}
int usb_lowlevel_stop(int index)
@ -1214,7 +1247,7 @@ static int dwc2_usb_probe(struct udevice *dev)
bus_priv->desc_before_addr = true;
return dwc2_init_common(priv);
return dwc2_init_common(dev, priv);
}
static int dwc2_usb_remove(struct udevice *dev)