linux-kernel - Re: [v2 PATCH 1/1] powerpc/4xx: enable and fix pcie gen1/gen2 on the 460sx

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Date:	Mon, 18 Jul 2011 14:01:15 +1000
From:	Tony Breeds <tony@...eyournoodle.com>
To:	Ayman Elkhashab <aymane@...hashab.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Ayman El-Khashab <ayman@...hashab.com>
Subject: Re: [v2 PATCH 1/1] powerpc/4xx: enable and fix pcie gen1/gen2 on the
 460sx

On Fri, Jul 15, 2011 at 11:40:27AM -0500, Ayman Elkhashab wrote:

> @@ -1582,8 +1628,8 @@ static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port	*port,
>  		dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah);
>  		dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal);
>  		dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff);
> -		/* Note that 3 here means enabled | single region */
> -		dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, sa | 3);
> +		dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL,
> +				sa | DCRO_PEGPL_OMRxMSKL_VAL);

Didn't you just change "sa | 3" to "sa | 1" ?

<snip>

> index 56d9e5d..61b3659 100644
> --- a/arch/powerpc/sysdev/ppc4xx_pci.h
> +++ b/arch/powerpc/sysdev/ppc4xx_pci.h
> @@ -464,6 +464,18 @@
>  #define PECFG_POM2LAL		0x390
>  #define PECFG_POM2LAH		0x394
>  
> +/* 460sx only */
> +#define PECFG_460SX_DLLSTA     0x3f8
> +
> +/* 460sx Bit Mappings */
> +#define PECFG_460SX_DLLSTA_LINKUP	 0x00000010
> +#define DCRO_PEGPL_460SX_OMR1MSKL_UOT	 0x00000004
> +
> +/* PEGPL Bit Mappings */
> +#define DCRO_PEGPL_OMRxMSKL_VAL	 0x00000001
> +#define DCRO_PEGPL_OMR1MSKL_UOT	 0x00000002
> +#define DCRO_PEGPL_OMR3MSKL_IO	 0x00000002
> +
>  /* SDR Bit Mappings */
>  #define PESDRx_RCSSET_HLDPLB	0x10000000
>  #define PESDRx_RCSSET_RSTGU	0x01000000

Yours Tony
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