powerpc/usb: Workaround for erratum-A006261
USB spec says that the minimum disconnect threshold should be
over 525 mV. However, internal USB PHY threshold value is below
this specified value. Due to this some devices disconnect at
run-time. Hence, phy settings are tweaked to increased disconnect
threshold to be above 525mV by using this workaround.
Signed-off-by: Suresh Gupta <suresh.gupta@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/fsl_usb.h b/include/fsl_usb.h
index 915774c..8b63cdd 100644
--- a/include/fsl_usb.h
+++ b/include/fsl_usb.h
@@ -52,13 +52,32 @@
#define CONFIG_SYS_FSL_USB_PLLPRG2_MFI (5 << 16)
#define CONFIG_SYS_FSL_USB_PLLPRG2_PLL_EN (1 << 21)
#define CONFIG_SYS_FSL_USB_SYS_CLK_VALID (1 << 0)
+#define CONFIG_SYS_FSL_USB_XCVRPRG_HS_DCNT_PROG_EN (1 << 7)
+#define CONFIG_SYS_FSL_USB_XCVRPRG_HS_DCNT_PROG_MASK (3 << 4)
+
+#define INC_DCNT_THRESHOLD_25MV (0 << 4)
+#define INC_DCNT_THRESHOLD_50MV (1 << 4)
+#define DEC_DCNT_THRESHOLD_25MV (2 << 4)
+#define DEC_DCNT_THRESHOLD_50MV (3 << 4)
#else
struct ccsr_usb_phy {
- u8 res0[0x18];
+ u32 config1;
+ u32 config2;
+ u32 config3;
+ u32 config4;
+ u32 config5;
+ u32 status1;
u32 usb_enable_override;
u8 res[0xe4];
};
-#define CONFIG_SYS_FSL_USB_ENABLE_OVERRIDE 1
+#define CONFIG_SYS_FSL_USB_HS_DISCNCT_INC (3 << 22)
+#define CONFIG_SYS_FSL_USB_RX_AUTO_CAL_RD_WR_SEL (1 << 20)
+#define CONFIG_SYS_FSL_USB_SQUELCH_PROG_WR_0 13
+#define CONFIG_SYS_FSL_USB_SQUELCH_PROG_WR_3 16
+#define CONFIG_SYS_FSL_USB_SQUELCH_PROG_RD_0 0
+#define CONFIG_SYS_FSL_USB_SQUELCH_PROG_RD_3 3
+#define CONFIG_SYS_FSL_USB_ENABLE_OVERRIDE 1
+#define CONFIG_SYS_FSL_USB_SQUELCH_PROG_MASK 0x07
#endif
#endif /*_ASM_FSL_USB_H_ */