[U-Boot] [PATCH v5] arm: Add sata support on Layerscape ARMv8 board

[York Sun <yorksun@freescale.com>]

On 12/01/2015 07:27 PM, Yuantian.Tang at freescale.com wrote:
> From: Tang Yuantian <Yuantian.Tang@freescale.com>
> 
> Freescale ARM-based Layerscape contains a SATA controller
> which comply with the serial ATA 3.0 specification and the
> AHCI 1.3 specification.
> This patch adds SATA feature on ls2080aqds, ls2080ardb and
> ls1043aqds boards.
> 
> Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
> ---
> v5:
> 	- re-organize the code
> v4:
> 	- rebase to lastest git tree
> 	- add another ARMv8 platform which is ls1043aqds
> v3:
> 	- rename ls2085a to ls2080a
> 	- rebase to the latest git tree
> 	- replace the magic number with micro variable
> v2:
> 	- rebase to the latest git tree
> 
>  arch/arm/cpu/armv8/fsl-layerscape/soc.c            | 43 ++++++++++++++++++++++
>  .../include/asm/arch-fsl-layerscape/immap_lsch3.h  |  4 ++
>  arch/arm/include/asm/arch-fsl-layerscape/soc.h     | 31 ++++++++++++++++
>  include/configs/ls1043aqds.h                       | 17 +++++++++
>  include/configs/ls2080aqds.h                       | 18 +++++++++
>  include/configs/ls2080ardb.h                       | 18 +++++++++
>  6 files changed, 131 insertions(+)
> 
> diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
> index 8896b70..574ffc4 100644
> --- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
> +++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
> @@ -6,6 +6,8 @@
>  
>  #include <common.h>
>  #include <fsl_ifc.h>
> +#include <ahci.h>
> +#include <scsi.h>
>  #include <asm/arch/soc.h>
>  #include <asm/io.h>
>  #include <asm/global_data.h>
> @@ -120,7 +122,44 @@ void fsl_lsch3_early_init_f(void)
>  	erratum_a009203();
>  }
>  

Yuantian,

Please help me understand below.

> +#ifdef CONFIG_SCSI_AHCI_PLAT
> +int sata_init(void)
> +{
> +	struct ccsr_ahci __iomem *ccsr_ahci;
> +
> +	ccsr_ahci  = (void *)CONFIG_SYS_SATA2;
> +	out_le32(&ccsr_ahci->ppcfg, AHCI_PORT_PHY_1_CFG);
> +	out_le32(&ccsr_ahci->ptc, AHCI_PORT_TRANS_CFG);

You didn't set pp2c or pp3c. Is it because the default values are OK or
something else?

> +
> +	ccsr_ahci  = (void *)CONFIG_SYS_SATA1;
> +	out_le32(&ccsr_ahci->ppcfg, AHCI_PORT_PHY_1_CFG);
> +	out_le32(&ccsr_ahci->ptc, AHCI_PORT_TRANS_CFG);
> +
> +	ahci_init((void __iomem *)CONFIG_SYS_SATA1);

You only call ahci_init() here but not above. Is SATA2 active?


> +	scsi_scan(0);
> +
> +	return 0;
> +}
> +#endif
> +
>  #elif defined(CONFIG_LS1043A)
> +#ifdef CONFIG_SCSI_AHCI_PLAT
> +int sata_init(void)
> +{
> +	struct ccsr_ahci __iomem *ccsr_ahci = (void *)CONFIG_SYS_SATA;
> +
> +	out_le32(&ccsr_ahci->ppcfg, AHCI_PORT_PHY_1_CFG);
> +	out_le32(&ccsr_ahci->pp2c, AHCI_PORT_PHY_2_CFG);
> +	out_le32(&ccsr_ahci->pp3c, AHCI_PORT_PHY_3_CFG);
> +	out_le32(&ccsr_ahci->ptc, AHCI_PORT_TRANS_CFG);
> +
> +	ahci_init((void __iomem *)CONFIG_SYS_SATA);
> +	scsi_scan(0);
> +
> +	return 0;
> +}
> +#endif
> +

York