diff options
| -rw-r--r-- | Documentation/devicetree/bindings/usb/dwc3.txt | 3 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.c | 17 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.h | 11 | ||||
| -rw-r--r-- | drivers/usb/dwc3/platform_data.h | 3 |
4 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 1ecc333..b724b2e 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -29,6 +29,9 @@ Optional properties: - snps,lfps_filter_quirk: when set core will filter LFPS reception. - snps,rx_detect_poll_quirk: when set core will disable a 400us delay to start Polling LFPS after RX.Detect. + - snps,tx_de_emphasis_quirk: when set core will set Tx de-emphasis value. + - snps,tx_de_emphasis: the value driven to the PHY is controlled by the + LTSSM during USB3 Compliance mode. This is usually a subnode to DWC3 glue to which it is connected. diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index aefb59d..c3dfb19 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -401,6 +401,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc) if (dwc->rx_detect_poll_quirk) reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL; + if (dwc->tx_de_emphasis_quirk) + reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis); + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); mdelay(100); @@ -720,6 +723,7 @@ static int dwc3_probe(struct platform_device *pdev) struct resource *res; struct dwc3 *dwc; u8 lpm_nyet_threshold; + u8 tx_de_emphasis; int ret; @@ -778,6 +782,9 @@ static int dwc3_probe(struct platform_device *pdev) /* default to highest possible threshold */ lpm_nyet_threshold = 0xff; + /* default to -3.5dB de-emphasis */ + tx_de_emphasis = 1; + if (node) { dwc->maximum_speed = of_usb_get_maximum_speed(node); dwc->has_lpm_erratum = of_property_read_bool(node, @@ -805,6 +812,11 @@ static int dwc3_probe(struct platform_device *pdev) "snps,lfps_filter_quirk"); dwc->rx_detect_poll_quirk = of_property_read_bool(node, "snps,rx_detect_poll_quirk"); + + dwc->tx_de_emphasis_quirk = of_property_read_bool(node, + "snps,tx_de_emphasis_quirk"); + of_property_read_u8(node, "snps,tx_de_emphasis", + &tx_de_emphasis); } else if (pdata) { dwc->maximum_speed = pdata->maximum_speed; dwc->has_lpm_erratum = pdata->has_lpm_erratum; @@ -822,6 +834,10 @@ static int dwc3_probe(struct platform_device *pdev) dwc->del_phy_power_chg_quirk = pdata->del_phy_power_chg_quirk; dwc->lfps_filter_quirk = pdata->lfps_filter_quirk; dwc->rx_detect_poll_quirk = pdata->rx_detect_poll_quirk; + + dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk; + if (pdata->tx_de_emphasis) + tx_de_emphasis = pdata->tx_de_emphasis; } /* default to superspeed if no maximum_speed passed */ @@ -829,6 +845,7 @@ static int dwc3_probe(struct platform_device *pdev) dwc->maximum_speed = USB_SPEED_SUPER; dwc->lpm_nyet_threshold = lpm_nyet_threshold; + dwc->tx_de_emphasis = tx_de_emphasis; ret = dwc3_core_get_phy(dwc); if (ret) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 8953d73..cf9aaca 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -185,6 +185,8 @@ #define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17) #define DWC3_GUSB3PIPECTL_LFPSFILT (1 << 9) #define DWC3_GUSB3PIPECTL_RX_DETOPOLL (1 << 8) +#define DWC3_GUSB3PIPECTL_TX_DEEPH_MASK DWC3_GUSB3PIPECTL_TX_DEEPH(3) +#define DWC3_GUSB3PIPECTL_TX_DEEPH(n) ((n) << 1) /* Global TX Fifo Size Register */ #define DWC3_GTXFIFOSIZ_TXFDEF(n) ((n) & 0xffff) @@ -695,6 +697,12 @@ struct dwc3_scratchpad_array { * @del_phy_power_chg_quirk: set if we enable delay phy power change quirk * @lfps_filter_quirk: set if we enable LFPS filter quirk * @rx_detect_poll_quirk: set if we enable rx_detect to polling lfps quirk + * @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk + * @tx_de_emphasis: Tx de-emphasis value + * 0 - -6dB de-emphasis + * 1 - -3.5dB de-emphasis + * 2 - No de-emphasis + * 3 - Reserved */ struct dwc3 { struct usb_ctrlrequest *ctrl_req; @@ -810,6 +818,9 @@ struct dwc3 { unsigned del_phy_power_chg_quirk:1; unsigned lfps_filter_quirk:1; unsigned rx_detect_poll_quirk:1; + + unsigned tx_de_emphasis_quirk:1; + unsigned tx_de_emphasis:2; }; /* -------------------------------------------------------------------------- */ diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h index 4a0f06b..e1ab900 100644 --- a/drivers/usb/dwc3/platform_data.h +++ b/drivers/usb/dwc3/platform_data.h @@ -36,4 +36,7 @@ struct dwc3_platform_data { unsigned del_phy_power_chg_quirk:1; unsigned lfps_filter_quirk:1; unsigned rx_detect_poll_quirk:1; + + unsigned tx_de_emphasis_quirk:1; + unsigned tx_de_emphasis:2; }; |
