[U-Boot] [PATCH v2] sata: fix reset_sata for dwc_ahsata

[Stefano Babic <sbabic@denx.de>]

On 27/11/2014 10:11, Soeren Moch wrote:
> - fix crash when sata device is not initialized
> - remove disable_sata_clock() since it is not clear which clock for which
>   device should be disabled here
> - call disable_sata_clock() for mx6 in preboot_os instead
> 
> Signed-off-by: Soeren Moch <smoch@web.de>
> ---
> Changes in v2:
> - fix type cast warning
> 
> Cc: Tom Rini <trini@ti.com>
> Cc: Nikita Kiryanov <nikita@compulab.co.il>
> Cc: Simon Glass <sjg@chromium.org>
> Cc: guillaume.gardet at free.fr
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Stefano Babic <sbabic@denx.de>
> ---
>  arch/arm/imx-common/cpu.c  |  3 +++
>  drivers/block/dwc_ahsata.c | 14 ++++++++------
>  2 files changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/imx-common/cpu.c b/arch/arm/imx-common/cpu.c
> index b58df7d..28ccd29 100644
> --- a/arch/arm/imx-common/cpu.c
> +++ b/arch/arm/imx-common/cpu.c
> @@ -206,6 +206,9 @@ void arch_preboot_os(void)
>  {
>  #if defined(CONFIG_CMD_SATA)
>  	sata_stop();
> +#if defined(CONFIG_MX6)
> +	disable_sata_clock();
> +#endif
>  #endif
>  #if defined(CONFIG_VIDEO_IPUV3)
>  	/* disable video before launching O/S */
> diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
> index 9a2b547..01a4148 100644
> --- a/drivers/block/dwc_ahsata.c
> +++ b/drivers/block/dwc_ahsata.c
> @@ -594,22 +594,24 @@ int init_sata(int dev)
>  
>  int reset_sata(int dev)
>  {
> -	struct ahci_probe_ent *probe_ent =
> -			(struct ahci_probe_ent *)sata_dev_desc[dev].priv;
> -	struct sata_host_regs *host_mmio =
> -			(struct sata_host_regs *)probe_ent->mmio_base;
> +	struct ahci_probe_ent *probe_ent;
> +	struct sata_host_regs *host_mmio;
>  
>  	if (dev < 0 || dev > (CONFIG_SYS_SATA_MAX_DEVICE - 1)) {
>  		printf("The sata index %d is out of ranges\n\r", dev);
>  		return -1;
>  	}
>  
> +	probe_ent = (struct ahci_probe_ent *)sata_dev_desc[dev].priv;
> +	if (NULL == probe_ent)
> +		/* not initialized, so nothing to reset */
> +		return 0;
> +
> +	host_mmio = (struct sata_host_regs *)probe_ent->mmio_base;
>  	setbits_le32(&host_mmio->ghc, SATA_HOST_GHC_HR);
>  	while (readl(&host_mmio->ghc) & SATA_HOST_GHC_HR)
>  		udelay(100);
>  
> -	disable_sata_clock();
> -
>  	return 0;
>  }
>  
> 

Applied to u-boot-imx, thanks !

Best regards,
Stefano Babic


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