diff options
| author | Huang Rui <ray.huang@amd.com> | 2014-10-28 14:54:25 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-11-03 19:03:36 +0300 |
| commit | 3b81221a529c087171557d7c4aec02b0ba029bb1 (patch) | |
| tree | 158fa460c699ac0101fc66deaff855002bb240c3 /drivers/usb/dwc3/core.c | |
| parent | 8f317b47140ddbce831176db9669d2100030d18a (diff) | |
| download | linux-3b81221a529c087171557d7c4aec02b0ba029bb1.tar.xz | |
usb: dwc3: add disscramble quirk
This patch adds disscramble quirk, and it only needs to be enabled at fpga
board on some vendor platforms.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 9830f87b6940..a0ae1326b7e3 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -422,7 +422,6 @@ static int dwc3_core_init(struct dwc3 *dwc) reg = dwc3_readl(dwc->regs, DWC3_GCTL); reg &= ~DWC3_GCTL_SCALEDOWN_MASK; - reg &= ~DWC3_GCTL_DISSCRAMBLE; switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { case DWC3_GHWPARAMS1_EN_PWROPT_CLK: @@ -466,6 +465,14 @@ static int dwc3_core_init(struct dwc3 *dwc) dwc->is_fpga = true; } + WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga, + "disable_scramble cannot be used on non-FPGA builds\n"); + + if (dwc->disable_scramble_quirk && dwc->is_fpga) + reg |= DWC3_GCTL_DISSCRAMBLE; + else + reg &= ~DWC3_GCTL_DISSCRAMBLE; + /* * WORKAROUND: DWC3 revisions <1.90a have a bug * where the device can fail to connect at SuperSpeed @@ -710,11 +717,16 @@ static int dwc3_probe(struct platform_device *pdev) dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize"); dwc->dr_mode = of_usb_get_dr_mode(node); + + dwc->disable_scramble_quirk = of_property_read_bool(node, + "snps,disable_scramble_quirk"); } else if (pdata) { dwc->maximum_speed = pdata->maximum_speed; dwc->needs_fifo_resize = pdata->tx_fifo_resize; dwc->dr_mode = pdata->dr_mode; + + dwc->disable_scramble_quirk = pdata->disable_scramble_quirk; } /* default to superspeed if no maximum_speed passed */ |