[U-Boot] [PATCH] mvsata: issue hard reset on initialization

[Prafulla Wadaskar]

> -----Original Message-----
> From: Michael Walle [mailto:michael at walle.cc]
> Sent: Monday, May 02, 2011 3:35 AM
> To: u-boot at lists.denx.de
> Cc: Michael Walle; Prafulla Wadaskar
> Subject: [PATCH] mvsata: issue hard reset on initialization
> 
> Before the actual initialization do a hard reset of the SATA port and
> the
> connected device.

Copying Albert for his ack

Regards..
Prafulla . .

> 
> Signed-off-by: Michael Walle <michael at walle.cc>
> Cc: Prafulla Wadaskar <prafulla at marvell.com>
> ---
>  drivers/block/mvsata_ide.c |   10 +++++++++-
>  1 files changed, 9 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/block/mvsata_ide.c b/drivers/block/mvsata_ide.c
> index 3d6993a..ff880d5 100644
> --- a/drivers/block/mvsata_ide.c
> +++ b/drivers/block/mvsata_ide.c
> @@ -33,7 +33,9 @@
> 
>  /* SATA port registers */
>  struct mvsata_port_registers {
> -	u32 reserved1[192];
> +	u32 reserved0[10];
> +	u32 edma_cmd;
> +	u32 reserved1[181];
>  	/* offset 0x300 : ATA Interface registers */
>  	u32 sstatus;
>  	u32 serror;
> @@ -76,6 +78,7 @@ struct mvsata_port_registers {
>   * and for SStatus DETection.
>   */
> 
> +#define MVSATA_EDMA_CMD_ATA_RST		0x00000004
>  #define MVSATA_SCONTROL_DET_MASK		0x0000000F
>  #define MVSATA_SCONTROL_DET_NONE		0x00000000
>  #define MVSATA_SCONTROL_DET_INIT		0x00000001
> @@ -115,6 +118,11 @@ static int mvsata_ide_initialize_port(struct
> mvsata_port_registers *port)
>  	u32 status;
>  	u32 timeleft = 10000; /* wait at most 10 ms for SATA reset to
> complete */
> 
> +	/* Hard reset */
> +	writel(MVSATA_EDMA_CMD_ATA_RST, &port->edma_cmd);
> +	udelay(25);
> +	writel(0, &port->edma_cmd);
> +
>  	/* Set control IPM to 3 (no low power) and DET to 1 (initialize) */
>  	control = readl(&port->scontrol);
>  	control = (control & ~MVSATA_SCONTROL_MASK) | MVSATA_PORT_INIT;
> --
> 1.7.2.3