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armv7: Add workaround for USB erratum A-008997

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Low Frequency Periodic Singaling (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 18:46:54 +08:00 committed by York Sun
parent c1853f6f73
commit e10d114279
3 changed files with 22 additions and 0 deletions
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6
arch/arm/cpu/armv7/ls102xa/Kconfig
View file

@ -2,6 +2,7 @@ config ARCH_LS1021A
bool
select SYS_FSL_ERRATUM_A008378
select SYS_FSL_ERRATUM_A008407
select SYS_FSL_ERRATUM_A008997
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009663
select SYS_FSL_ERRATUM_A009798
@ -60,6 +61,11 @@ config SYS_CCI400_OFFSET
Offset for CCI400 base.
CCI400 base addr = CCSRBAR + CCI400_OFFSET
config SYS_FSL_ERRATUM_A008997
bool
help
Workaround for USB PHY erratum A008997
config SYS_FSL_ERRATUM_A009008
bool
help

13
arch/arm/cpu/armv7/ls102xa/soc.c
View file

@ -81,6 +81,18 @@ static void erratum_a009798(void)
#endif /* CONFIG_SYS_FSL_ERRATUM_A009798 */
}
static void erratum_a008997(void)
{
#ifdef CONFIG_SYS_FSL_ERRATUM_A008997
u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
clrsetbits_be32(scfg + SCFG_USB3PRM2CR / 4,
SCFG_USB_PCSTXSWINGFULL_MASK,
SCFG_USB_PCSTXSWINGFULL_VAL);
#endif /* CONFIG_SYS_FSL_ERRATUM_A008997 */
}
void s_init(void)
{
}
@ -171,6 +183,7 @@ int arch_soc_init(void)
/* Erratum */
erratum_a009008();
erratum_a009798();
erratum_a008997();
return 0;
}

3
arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
View file

@ -178,6 +178,9 @@ struct ccsr_gur {
#define SCFG_USB3PRM1CR 0x070
#define SCFG_USB_TXVREFTUNE 0x9
#define SCFG_USB_SQRXTUNE_MASK 0x7
#define SCFG_USB3PRM2CR 0x074
#define SCFG_USB_PCSTXSWINGFULL_MASK 0x0000FE00
#define SCFG_USB_PCSTXSWINGFULL_VAL 0x00008E00
/* Supplemental Configuration Unit */
struct ccsr_scfg {