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 --- arch/powerpc/cpu/mpc85xx/cmd_errata.c | 4 ++ arch/powerpc/cpu/mpc85xx/cpu_init.c | 62 +++++++++++++++++++++++++++++++ arch/powerpc/include/asm/config_mpc85xx.h | 7 ++++ arch/powerpc/include/asm/fsl_errata.h | 31 ++++++++++++++++ include/fsl_usb.h | 23 +++++++++++- 5 files changed, 125 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 7693899..2a15802 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -265,6 +265,10 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) (SVR_REV(svr) <= CONFIG_SYS_FSL_A004447_SVR_REV)) puts("Work-around for Erratum I2C-A004447 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A006261 + if (has_erratum_a006261()) + puts("Work-around for Erratum A006261 enabled\n"); +#endif return 0; }
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index b31efb7..81aeadd 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -36,6 +36,54 @@
DECLARE_GLOBAL_DATA_PTR;
+#ifdef CONFIG_SYS_FSL_ERRATUM_A006261 +void fsl_erratum_a006261_workaround(struct ccsr_usb_phy __iomem *usb_phy) +{ +#ifdef CONFIG_SYS_FSL_USB_DUAL_PHY_ENABLE + u32 xcvrprg = in_be32(&usb_phy->port1.xcvrprg); + + /* Increase Disconnect Threshold by 50mV */ + xcvrprg &= ~CONFIG_SYS_FSL_USB_XCVRPRG_HS_DCNT_PROG_MASK | + INC_DCNT_THRESHOLD_50MV; + /* Enable programming of USB High speed Disconnect threshold */ + xcvrprg |= CONFIG_SYS_FSL_USB_XCVRPRG_HS_DCNT_PROG_EN; + out_be32(&usb_phy->port1.xcvrprg, xcvrprg); + + xcvrprg = in_be32(&usb_phy->port2.xcvrprg); + /* Increase Disconnect Threshold by 50mV */ + xcvrprg &= ~CONFIG_SYS_FSL_USB_XCVRPRG_HS_DCNT_PROG_MASK | + INC_DCNT_THRESHOLD_50MV; + /* Enable programming of USB High speed Disconnect threshold */ + xcvrprg |= CONFIG_SYS_FSL_USB_XCVRPRG_HS_DCNT_PROG_EN; + out_be32(&usb_phy->port2.xcvrprg, xcvrprg); +#else + + u32 temp = 0; + u32 status = in_be32(&usb_phy->status1); + + u32 squelch_prog_rd_0_2 = + (status >> CONFIG_SYS_FSL_USB_SQUELCH_PROG_RD_0) + & CONFIG_SYS_FSL_USB_SQUELCH_PROG_MASK; + + u32 squelch_prog_rd_3_5 = + (status >> CONFIG_SYS_FSL_USB_SQUELCH_PROG_RD_3) + & CONFIG_SYS_FSL_USB_SQUELCH_PROG_MASK; + + setbits_be32(&usb_phy->config1, + CONFIG_SYS_FSL_USB_HS_DISCNCT_INC); + setbits_be32(&usb_phy->config2, + CONFIG_SYS_FSL_USB_RX_AUTO_CAL_RD_WR_SEL); + + temp = squelch_prog_rd_0_2 << CONFIG_SYS_FSL_USB_SQUELCH_PROG_WR_0; + out_be32(&usb_phy->config2, in_be32(&usb_phy->config2) | temp); + + temp = squelch_prog_rd_3_5 << CONFIG_SYS_FSL_USB_SQUELCH_PROG_WR_3; + out_be32(&usb_phy->config2, in_be32(&usb_phy->config2) | temp); +#endif +} +#endif + + #ifdef CONFIG_QE extern qe_iop_conf_t qe_iop_conf_tab[]; extern void qe_config_iopin(u8 port, u8 pin, int dir, @@ -625,6 +673,10 @@ skip_l2: { struct ccsr_usb_phy __iomem *usb_phy1 = (void *)CONFIG_SYS_MPC85xx_USB1_PHY_ADDR; +#ifdef CONFIG_SYS_FSL_ERRATUM_A006261 + if (has_erratum_a006261()) + fsl_erratum_a006261_workaround(usb_phy1); +#endif out_be32(&usb_phy1->usb_enable_override, CONFIG_SYS_FSL_USB_ENABLE_OVERRIDE); } @@ -633,6 +685,10 @@ skip_l2: { struct ccsr_usb_phy __iomem *usb_phy2 = (void *)CONFIG_SYS_MPC85xx_USB2_PHY_ADDR; +#ifdef CONFIG_SYS_FSL_ERRATUM_A006261 + if (has_erratum_a006261()) + fsl_erratum_a006261_workaround(usb_phy2); +#endif out_be32(&usb_phy2->usb_enable_override, CONFIG_SYS_FSL_USB_ENABLE_OVERRIDE); } @@ -672,8 +728,14 @@ skip_l2: CONFIG_SYS_FSL_USB_DRVVBUS_CR_EN); setbits_be32(&usb_phy->port2.pwrfltcfg, CONFIG_SYS_FSL_USB_PWRFLT_CR_EN); + +#ifdef CONFIG_SYS_FSL_ERRATUM_A006261 + if (has_erratum_a006261()) + fsl_erratum_a006261_workaround(usb_phy); #endif
+#endif /* CONFIG_SYS_FSL_USB_DUAL_PHY_ENABLE */ + #ifdef CONFIG_FMAN_ENET fman_enet_init(); #endif diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h index be1d9d2..9f1d202 100644 --- a/arch/powerpc/include/asm/config_mpc85xx.h +++ b/arch/powerpc/include/asm/config_mpc85xx.h @@ -151,6 +151,7 @@ #define CONFIG_SYS_FSL_ERRATUM_IFC_A003399 #define CONFIG_SYS_FSL_ERRATUM_A005125 #define CONFIG_SYS_FSL_ERRATUM_I2C_A004447 +#define CONFIG_SYS_FSL_ERRATUM_A006261 #define CONFIG_SYS_FSL_A004447_SVR_REV 0x10 #define CONFIG_ESDHC_HC_BLK_ADDR
@@ -383,6 +384,7 @@ #define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034 #define CONFIG_SYS_FSL_ERRATUM_A004849 #define CONFIG_SYS_FSL_ERRATUM_I2C_A004447 +#define CONFIG_SYS_FSL_ERRATUM_A006261 #define CONFIG_SYS_FSL_A004447_SVR_REV 0x11
#elif defined(CONFIG_PPC_P3041) @@ -421,6 +423,7 @@ #define CONFIG_SYS_FSL_ERRATUM_A004849 #define CONFIG_SYS_FSL_ERRATUM_A005812 #define CONFIG_SYS_FSL_ERRATUM_I2C_A004447 +#define CONFIG_SYS_FSL_ERRATUM_A006261 #define CONFIG_SYS_FSL_A004447_SVR_REV 0x20
#elif defined(CONFIG_PPC_P4080) /* also supports P4040 */ @@ -504,6 +507,7 @@ #define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xc0000000 #define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034 #define CONFIG_SYS_FSL_ERRATUM_I2C_A004447 +#define CONFIG_SYS_FSL_ERRATUM_A006261 #define CONFIG_SYS_FSL_A004447_SVR_REV 0x20
#elif defined(CONFIG_PPC_P5040) @@ -535,6 +539,7 @@ #define CONFIG_SYS_FSL_ERRATUM_A004699 #define CONFIG_SYS_FSL_ERRATUM_A004510 #define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 0x10 +#define CONFIG_SYS_FSL_ERRATUM_A006261 #define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xf0000000 #define CONFIG_SYS_FSL_ERRATUM_A005812
@@ -630,6 +635,7 @@ #define CONFIG_SYS_FSL_ERRATUM_A004468 #define CONFIG_SYS_FSL_ERRATUM_A_004934 #define CONFIG_SYS_FSL_ERRATUM_A005871 +#define CONFIG_SYS_FSL_ERRATUM_A006261 #define CONFIG_SYS_FSL_ERRATUM_A006379 #define CONFIG_SYS_FSL_ERRATUM_A006593 #define CONFIG_SYS_CCSRBAR_DEFAULT 0xfe000000 @@ -720,6 +726,7 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022) #define CONFIG_SYS_FSL_USB1_PHY_ENABLE #define CONFIG_SYS_FSL_USB2_PHY_ENABLE #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY +#define CONFIG_SYS_FSL_ERRATUM_A006261 #define CONFIG_SYS_CCSRBAR_DEFAULT 0xfe000000
#elif defined(CONFIG_PPC_T2080) || defined(CONFIG_PPC_T2081) diff --git a/arch/powerpc/include/asm/fsl_errata.h b/arch/powerpc/include/asm/fsl_errata.h index a590919..649c8f1 100644 --- a/arch/powerpc/include/asm/fsl_errata.h +++ b/arch/powerpc/include/asm/fsl_errata.h @@ -26,4 +26,35 @@ static inline bool has_erratum_a006379(void) } #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_A006261 +static inline bool has_erratum_a006261(void) +{ + u32 svr = get_svr(); + u32 soc = SVR_SOC_VER(svr); + + switch (soc) { + case SVR_P1010: + return IS_SVR_REV(svr, 1, 0) || IS_SVR_REV(svr, 2, 0); + case SVR_P2041: + return IS_SVR_REV(svr, 1, 0) || + IS_SVR_REV(svr, 1, 1) || IS_SVR_REV(svr, 2, 1); + case SVR_P3041: + return IS_SVR_REV(svr, 1, 0) || + IS_SVR_REV(svr, 1, 1) || + IS_SVR_REV(svr, 2, 0) || IS_SVR_REV(svr, 2, 1); + case SVR_P5020: + return IS_SVR_REV(svr, 1, 0) || IS_SVR_REV(svr, 2, 0); + case SVR_T4240: + case SVR_T4160: + return IS_SVR_REV(svr, 1, 0) || IS_SVR_REV(svr, 2, 0); + case SVR_T1040: + return IS_SVR_REV(svr, 1, 0); + case SVR_P5040: + return IS_SVR_REV(svr, 1, 0); + } + + return false; +} +#endif + #endif 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 @@ struct ccsr_usb_phy { #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_ */