[U-Boot] [u-boot-release] [PATCH 2/3] fsl_sata: Add the workaround for errata SATA-A001

[Kumar Gala]

On Apr 8, 2010, at 2:58 AM, Dave Liu wrote:

> After power on, the SATA host controller of P1022 Rev1 is configured
> in legacy mode instead of the expected enterprise mode.
> 
> software needs to clear bit[28] of HControl register to change to
> enterprise mode after bringing the host offline.
> 
> Signed-off-by: Dave Liu <daveliu at freescale.com>
> ---
> drivers/block/fsl_sata.c |   14 ++++++++++++++
> 1 files changed, 14 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/block/fsl_sata.c b/drivers/block/fsl_sata.c
> index abcda6f..d875581 100644
> --- a/drivers/block/fsl_sata.c
> +++ b/drivers/block/fsl_sata.c
> @@ -21,6 +21,7 @@
> #include <common.h>
> #include <command.h>
> #include <asm/io.h>
> +#include <asm/processor.h>
> #include <malloc.h>
> #include <libata.h>
> #include <fis.h>
> @@ -191,6 +192,19 @@ int init_sata(int dev)
> 	/* Wait the controller offline */
> 	ata_wait_register(&reg->hstatus, HSTATUS_ONOFF, 0, 1000);
> 
> +#ifdef CONFIG_SYS_P1022_ERRATUM_SATA-A001

This should just be #ifdef CONFIG_SYS_FSL_SATA_ERRATUM_A001 (the A001 # is not specific to P1022).  Also I want to standardize on all underscores instead of a mix with a dash even of the errata doc uses '-'.

> +	/* For P1022 Rev1.0 silicon, after power on SATA host
> +	 * controller is configured in legacy mode instead of
> +	 * the expected enterprise mode. software needs to clear
> +	 * bit[28] of HControl register to change to enterprise
> +	 * mode from legacy mode.
> +	 */
> +	if (IS_SVR_REV(get_svr(), 1, 0)) {
> +		out_le32(&reg->hstatus, 0x20000000);
> +		out_le32(&reg->hcontrol, 0x00000100);
> +	}

I'm trying to determine from the HW guys if we have a version register in the IP block to detect this at runtime in a chip unique way.

> +#endif
> +
> 	/* Set the command header base address to CHBA register to tell DMA */
> 	out_le32(&reg->chba, (u32)cmd_hdr & ~0x3);
> 
> -- 
> 1.6.4
> 
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