MCIMX6Q6AVT10AD SATA interface to read harddisk ID failed！

[zard33]

hi， I try to use I.MX chip MCIMX6Q6AVT10AD(rev 1.5) SATA interface to read harddisk ID failed, but MCIMX6Q6AVT10AC(rev 1.2) is work OK.  this is u-boot print infomation!

//*********************************************************   MCIMX6Q6AVT10AC(rev 1.2)   ****************************************************

U-Boot 2013.01 (Aug 11 2014 - 01:16:03)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz

Reset cause: POR

Board: SABRE Lite

DRAM:  256 MiB

WARNING: Caches not enabled

MMC:   FSL_SDHC: 0, FSL_SDHC: 1

SF: Detected SST25VF016B with page size 4 KiB, total 2 MiB

*** Warning - bad CRC, using default environment

No panel detected: default to HDMI

unsupported panel HDMI

In:    serial

Out:   serial

Err:   serial

Thermal fuse is 0x5844e67d, raw_25c=1412 raw_hot=1254 hot_temp=125 C scale=0.63

Temperature raw=1391 temperature= 38.29 C

Net:   Phy not found

using phy at 4

PHY reset timed out

FEC [PRIME]

Warning: failed to set MAC address

Hit any key to stop autoboot:  0

AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode

flags: ncq stag pm led clo only pmp pio slum part

SATA Device Info:

S/N:             9QE0M77K

Product model number: ST3250820AS

Firmware version: 3.AAC

Capacity: 488397168 sectors

SATA device 0: Model: ST3250820AS Firm: 3.AAC Ser#:             9QE0M77K

            Type: Hard Disk

            Supports 48-bit addressing

            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)

... is now current device

//*********************************************************   MCIMX6Q6AVT10AD(rev 1.5)   ****************************************************

U-Boot 2013.01 (Aug 11 2014 - 01:16:03)

CPU:   Freescale i.MX6Q rev1.5 at 792 MHz

Reset cause: POR

Board: SABRE Lite

DRAM:  256 MiB

WARNING: Caches not enabled

MMC:   FSL_SDHC: 0, FSL_SDHC: 1

SF: Detected SST25VF016B with page size 4 KiB, total 2 MiB

*** Warning - bad CRC, using default environment

No panel detected: default to HDMI

unsupported panel HDMI

In:    serial

Out:   serial

Err:   serial

Thermal fuse is 0x5714bc7d, raw_25c=1393 raw_hot=1212 hot_temp=125 C scale=0.55

Temperature raw=1396 temperature= 23.34 C

Net:   Phy not found

using phy at 4

PHY reset timed out

FEC [PRIME]

Warning: failed to set MAC address

Hit any key to stop autoboot:  0

AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode

flags: ncq stag pm led clo only pmp pio slum part

timeout exit!             

timeout exit!

SATA Device Info:

S/N:

Product model number:

Firmware version: 5

Capacity: 0 sectors

SATA device 0: Model:  Firm:  Ser#:

            Type: Hard Disk

            Capacity: not available

... is now current device

** Bad device size - sata 0 **

** Bad device size - sata 0 **

//*****************************************************************************************************************************************************

them use the same board and harddisk, why MCIMX6Q6AVT10AD(rev 1.5)  read ID is timeout ?

thanks!

[igorpadykov]

Hi zard33

I.MX6 chips may vary regarding SATA Phy strength and sensitivity levels, so

general sugestion in such cases try to do SATA TX compliance test, fine tune the

SATA controller registers (such as pre-emphasis parameters,

IOMUX GPR13 defines various SATA Phy transmitter/receiver settings.) and keep the

compliance test result with a better margin. (Eye-diagram should be look better).

Just for test one can try SDK for minimizing overall board noise and run it from iRAM

iRAM (OCRAM) i.MX6 SDK Application

i.MX 6Series Platform SDK : Bare-metal SDK

Best regards

igor

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[zard33]

dear all

I don't understand the GPR13 register setting, the default value = 0x0593E4C6，what parts may I need to change?

In addition, I view the SATA PHY register P0SSTS

bit  IPM = 0x1 (interface in active)

      SPD = 0x1 (1.5Gbps)

     DET = 0x3  (PHY ready)

the kernel print infomation

ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)

ata1.00: qc timeout (cmd 0xec)

do you have any test on the SATA code?

thanks！