> -----Original Message-----
> From: Michael Walle [mailto:mich...@walle.cc]
> Sent: Monday, May 02, 2011 3:35 AM
> To: u-boot@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 <mich...@walle.cc>
> Cc: Prafulla Wadaskar <prafu...@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
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