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armv8: Add workaround for USB erratum A-008997

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Low Frequency Periodic Signaling(LFPS) Peak-to-Peak Differential
Output Voltage Test Compliance fails using default transmitter
settings

Change config of transmitter signal swings by setting register
PCSTXSWINGFULL to 0x47 to pass compliance tests.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Suresh Gupta <suresh.gupta@nxp.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
[YS: Reordered Kconfig options]
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Ran Wang 2017-09-04 18:46:50 +08:00 committed by York Sun
parent 2a8a353958
commit 9d1cd910f7
3 changed files with 34 additions and 0 deletions
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6
arch/arm/cpu/armv8/fsl-layerscape/Kconfig
View File

@ -16,6 +16,7 @@ config ARCH_LS1043A
select SYS_FSL_DDR_BE
select SYS_FSL_DDR_VER_50
select SYS_FSL_ERRATUM_A008850
select SYS_FSL_ERRATUM_A008997
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009660
select SYS_FSL_ERRATUM_A009663
@ -41,6 +42,7 @@ config ARCH_LS1046A
select SYS_FSL_ERRATUM_A008336
select SYS_FSL_ERRATUM_A008511
select SYS_FSL_ERRATUM_A008850
select SYS_FSL_ERRATUM_A008997
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009798
select SYS_FSL_ERRATUM_A009801
@ -104,6 +106,7 @@ config ARCH_LS2080A
select SYS_FSL_ERRATUM_A008511
select SYS_FSL_ERRATUM_A008514
select SYS_FSL_ERRATUM_A008585
select SYS_FSL_ERRATUM_A008997
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009635
select SYS_FSL_ERRATUM_A009663
@ -254,6 +257,9 @@ config LS_PPA_ESBC_HDR_SIZE
endmenu
config SYS_FSL_ERRATUM_A008997
bool "Workaround for USB PHY erratum A008997"
config SYS_FSL_ERRATUM_A009008
bool "Workaround for USB PHY erratum A009008"

24
arch/arm/cpu/armv8/fsl-layerscape/soc.c
View File

@ -97,6 +97,28 @@ static void erratum_a009798(void)
#endif /* CONFIG_SYS_FSL_ERRATUM_A009798 */
}
#if defined(CONFIG_ARCH_LS1043A) || defined(CONFIG_ARCH_LS1046A)
static inline void set_usb_pcstxswingfull(u32 __iomem *scfg, u32 offset)
{
scfg_clrsetbits32(scfg + offset / 4,
0x7F << 9,
SCFG_USB_PCSTXSWINGFULL << 9);
}
#endif
static void erratum_a008997(void)
{
#ifdef CONFIG_SYS_FSL_ERRATUM_A008997
#if defined(CONFIG_ARCH_LS1043A) || defined(CONFIG_ARCH_LS1046A)
u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
set_usb_pcstxswingfull(scfg, SCFG_USB3PRM2CR_USB1);
set_usb_pcstxswingfull(scfg, SCFG_USB3PRM2CR_USB2);
set_usb_pcstxswingfull(scfg, SCFG_USB3PRM2CR_USB3);
#endif
#endif /* CONFIG_SYS_FSL_ERRATUM_A008997 */
}
#if defined(CONFIG_FSL_LSCH3)
/*
* This erratum requires setting a value to eddrtqcr1 to
@ -245,6 +267,7 @@ void fsl_lsch3_early_init_f(void)
erratum_a008336();
erratum_a009008();
erratum_a009798();
erratum_a008997();
#ifdef CONFIG_CHAIN_OF_TRUST
/* In case of Secure Boot, the IBR configures the SMMU
* to allow only Secure transactions.
@ -525,6 +548,7 @@ void fsl_lsch2_early_init_f(void)
erratum_a010539();
erratum_a009008();
erratum_a009798();
erratum_a008997();
}
#endif

4
arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
View File

@ -339,10 +339,14 @@ struct ccsr_gur {
#define SCFG_BASE 0x01570000
#define SCFG_USB3PRM1CR_USB1 0x070
#define SCFG_USB3PRM2CR_USB1 0x074
#define SCFG_USB3PRM1CR_USB2 0x07C
#define SCFG_USB3PRM2CR_USB2 0x080
#define SCFG_USB3PRM1CR_USB3 0x088
#define SCFG_USB3PRM2CR_USB3 0x08c
#define SCFG_USB_TXVREFTUNE 0x9
#define SCFG_USB_SQRXTUNE_MASK 0x7
#define SCFG_USB_PCSTXSWINGFULL 0x47
#define SCFG_SNPCNFGCR_SECRDSNP 0x80000000
#define SCFG_SNPCNFGCR_SECWRSNP 0x40000000