diff options
| author | John Youn <John.Youn@synopsys.com> | 2015-12-17 11:16:17 -0800 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-12-22 11:55:46 -0600 |
| commit | 6bea962053e76a4407f0d138184a8737eea960ee (patch) | |
| tree | d276638c1eb4e6d67dd413d62fdeab1ff3d2e621 /drivers/usb | |
| parent | b5d308abef1c5c0f24128845e41d414a8f8438f6 (diff) | |
| download | linux-6bea962053e76a4407f0d138184a8737eea960ee.tar.bz2 | |
usb: dwc2: Add functions to check the HW OTG config
Added functions to query the GHWCFG2.OTG_MODE. This tells us whether the
controller hardware is configured for OTG, device-only, or host-only.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc2/core.c | 37 | ||||
| -rw-r--r-- | drivers/usb/dwc2/core.h | 13 |
2 files changed, 50 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index 15f359fe76d3..b700a47e026a 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -3342,6 +3342,43 @@ void dwc2_disable_global_interrupts(struct dwc2_hsotg *hsotg) dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG); } +/* Returns the controller's GHWCFG2.OTG_MODE. */ +unsigned dwc2_op_mode(struct dwc2_hsotg *hsotg) +{ + u32 ghwcfg2 = dwc2_readl(hsotg->regs + GHWCFG2); + + return (ghwcfg2 & GHWCFG2_OP_MODE_MASK) >> + GHWCFG2_OP_MODE_SHIFT; +} + +/* Returns true if the controller is capable of DRD. */ +bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg) +{ + unsigned op_mode = dwc2_op_mode(hsotg); + + return (op_mode == GHWCFG2_OP_MODE_HNP_SRP_CAPABLE) || + (op_mode == GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE) || + (op_mode == GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE); +} + +/* Returns true if the controller is host-only. */ +bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg) +{ + unsigned op_mode = dwc2_op_mode(hsotg); + + return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_HOST) || + (op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST); +} + +/* Returns true if the controller is device-only. */ +bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg) +{ + unsigned op_mode = dwc2_op_mode(hsotg); + + return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE) || + (op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE); +} + MODULE_DESCRIPTION("DESIGNWARE HS OTG Core"); MODULE_AUTHOR("Synopsys, Inc."); MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 15e27bb509b5..1fd434510a43 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -1138,6 +1138,19 @@ extern int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg); extern int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg); /* + * The following functions check the controller's OTG operation mode + * capability (GHWCFG2.OTG_MODE). + * + * These functions can be used before the internal hsotg->hw_params + * are read in and cached so they always read directly from the + * GHWCFG2 register. + */ +unsigned dwc2_op_mode(struct dwc2_hsotg *hsotg); +bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg); +bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg); +bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg); + +/* * Dump core registers and SPRAM */ extern void dwc2_dump_dev_registers(struct dwc2_hsotg *hsotg); |