diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 94 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.h | 3 |
2 files changed, 97 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 103807587dc6..21e4931d0cc0 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -778,6 +778,98 @@ static void dwc3_core_setup_global_control(struct dwc3 *dwc) static int dwc3_core_get_phy(struct dwc3 *dwc); static int dwc3_core_ulpi_init(struct dwc3 *dwc); +/* set global incr burst type configuration registers */ +static void dwc3_set_incr_burst_type(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + /* incrx_mode : for INCR burst type. */ + bool incrx_mode; + /* incrx_size : for size of INCRX burst. */ + u32 incrx_size; + u32 *vals; + u32 cfg; + int ntype; + int ret; + int i; + + cfg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0); + + /* + * Handle property "snps,incr-burst-type-adjustment". + * Get the number of value from this property: + * result <= 0, means this property is not supported. + * result = 1, means INCRx burst mode supported. + * result > 1, means undefined length burst mode supported. + */ + ntype = device_property_read_u32_array(dev, + "snps,incr-burst-type-adjustment", NULL, 0); + if (ntype <= 0) + return; + + vals = kcalloc(ntype, sizeof(u32), GFP_KERNEL); + if (!vals) { + dev_err(dev, "Error to get memory\n"); + return; + } + + /* Get INCR burst type, and parse it */ + ret = device_property_read_u32_array(dev, + "snps,incr-burst-type-adjustment", vals, ntype); + if (ret) { + dev_err(dev, "Error to get property\n"); + return; + } + + incrx_size = *vals; + + if (ntype > 1) { + /* INCRX (undefined length) burst mode */ + incrx_mode = INCRX_UNDEF_LENGTH_BURST_MODE; + for (i = 1; i < ntype; i++) { + if (vals[i] > incrx_size) + incrx_size = vals[i]; + } + } else { + /* INCRX burst mode */ + incrx_mode = INCRX_BURST_MODE; + } + + /* Enable Undefined Length INCR Burst and Enable INCRx Burst */ + cfg &= ~DWC3_GSBUSCFG0_INCRBRST_MASK; + if (incrx_mode) + cfg |= DWC3_GSBUSCFG0_INCRBRSTENA; + switch (incrx_size) { + case 256: + cfg |= DWC3_GSBUSCFG0_INCR256BRSTENA; + break; + case 128: + cfg |= DWC3_GSBUSCFG0_INCR128BRSTENA; + break; + case 64: + cfg |= DWC3_GSBUSCFG0_INCR64BRSTENA; + break; + case 32: + cfg |= DWC3_GSBUSCFG0_INCR32BRSTENA; + break; + case 16: + cfg |= DWC3_GSBUSCFG0_INCR16BRSTENA; + break; + case 8: + cfg |= DWC3_GSBUSCFG0_INCR8BRSTENA; + break; + case 4: + cfg |= DWC3_GSBUSCFG0_INCR4BRSTENA; + break; + case 1: + break; + default: + dev_err(dev, "Invalid property\n"); + break; + } + + dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, cfg); +} + /** * dwc3_core_init - Low-level initialization of DWC3 Core * @dwc: Pointer to our controller context structure @@ -840,6 +932,8 @@ static int dwc3_core_init(struct dwc3 *dwc) /* Adjust Frame Length */ dwc3_frame_length_adjustment(dwc); + dwc3_set_incr_burst_type(dwc); + usb_phy_set_suspend(dwc->usb2_phy, 0); usb_phy_set_suspend(dwc->usb3_phy, 0); ret = phy_power_on(dwc->usb2_generic_phy); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 213b939ad011..5f14fb7121b1 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1168,6 +1168,9 @@ struct dwc3 { u16 imod_interval; }; +#define INCRX_BURST_MODE 0 +#define INCRX_UNDEF_LENGTH_BURST_MODE 1 + #define work_to_dwc(w) (container_of((w), struct dwc3, drd_work)) /* -------------------------------------------------------------------------- */ |