diff options
| author | Chris Packham | 2020-06-25 12:48:51 +1200 |
|---|---|---|
| committer | Stefan Roese | 2020-07-09 06:49:44 +0200 |
| commit | 4182232158bfff7363fa0b4eade360cf50551cb9 (patch) | |
| tree | 8685c0cf92620f8c982a7568097ec80027fc1cbd /arch/arm/mach-mvebu | |
| parent | ec9deec40032821a2ea17fbc503a48c6f8619589 (diff) | |
arm: mvebu: a38x: Adjust UTMI PHY parameters
When running USB compliance tests on our Armada-385 hardware platforms
we have seen some eye mask violations. Marvell's internal documentation
says: Based on silicon test results, it is recommended to change the
impedance calibration threshold setting to 0x6 prior to calibration.
Port changes from Marvell's u-boot fork[1] to address this.
[1] - https://github.com/MarvellEmbeddedProcessors/u-boot-marvell/commit/a6221551
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'arch/arm/mach-mvebu')
| -rw-r--r-- | arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c b/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c index d4480622c89..2454730e6d8 100644 --- a/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c +++ b/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c @@ -672,12 +672,29 @@ struct op_params usb2_power_up_params[] = { {0xc200c, 0x0 /*NA*/, 0x1000000, {0x1000000}, 0, 0}, /* Phy0 register 3 - TX Channel control 0 */ {0xc400c, 0x0 /*NA*/, 0x1000000, {0x1000000}, 0, 0}, - /* check PLLCAL_DONE is set and IMPCAL_DONE is set */ + /* Decrease the amplitude of the low speed eye to meet the spec */ + {0xc000c, 0x0 /*NA*/, 0xf000, {0x1000}, 0, 0}, + {0xc200c, 0x0 /*NA*/, 0xf000, {0x1000}, 0, 0}, + {0xc400c, 0x0 /*NA*/, 0xf000, {0x1000}, 0, 0}, + /* Change the High speed impedance threshold */ + {0xc0008, 0x0 /*NA*/, 0x700, {0x600}, 0, 0}, + {0xc2008, 0x0 /*NA*/, 0x700, {0x600}, 0, 0}, + {0xc4008, 0x0 /*NA*/, 0x700, {0x600}, 0, 0}, + /* Change the squelch level of the receiver to meet the receiver electrical measurements (squelch and receiver sensitivity tests) */ + {0xc0014, 0x0 /*NA*/, 0xf, {0x8}, 0, 0}, + {0xc2014, 0x0 /*NA*/, 0xf, {0x8}, 0, 0}, + {0xc4014, 0x0 /*NA*/, 0xf, {0x8}, 0, 0}, + /* Check PLLCAL_DONE is set and IMPCAL_DONE is set */ {0xc0008, 0x0 /*NA*/, 0x80800000, {0x80800000}, 1, 1000}, - /* check REG_SQCAL_DONE is set */ + /* Check REG_SQCAL_DONE is set */ {0xc0018, 0x0 /*NA*/, 0x80000000, {0x80000000}, 1, 1000}, - /* check PLL_READY is set */ - {0xc0000, 0x0 /*NA*/, 0x80000000, {0x80000000}, 1, 1000} + /* Check PLL_READY is set */ + {0xc0000, 0x0 /*NA*/, 0x80000000, {0x80000000}, 1, 1000}, + /* Start calibrate of high seed impedance */ + {0xc0008, 0x0 /*NA*/, 0x2000, {0x2000}, 0, 0}, + {0x0, 0x0 /*NA*/, 0x0, {0x0}, 10, 0}, + /* De-assert the calibration signal */ + {0xc0008, 0x0 /*NA*/, 0x2000, {0x0}, 0, 0}, }; /* |