diff options
| author | Kever Yang <kever.yang@rock-chips.com> | 2017-03-10 12:05:14 +0800 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2017-04-14 14:07:46 +0200 |
| commit | 5c73536738e1aa411b127d84dff41a5e60a4e610 (patch) | |
| tree | 92e78508316b210ed09880c65886df02566e1423 /drivers/usb | |
| parent | 40a808f173008729a0c631ab84693b6a2b0dcfc9 (diff) | |
usb: dwc2: add support for external vbus supply
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/dwc2.c | 43 |
1 files changed, 38 insertions, 5 deletions
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index d253b946f3..ae7d8fb1da 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -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, ®s->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(®s->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) |