netdev - Re: [PATCH 3/5] net/at91_ether: move eth addr quirk into csb337 board setup

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Message-ID: <20121021182551.GH12801@game.jcrosoft.org>
Date:	Sun, 21 Oct 2012 20:25:51 +0200
From:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To:	Joachim Eastwood <manabian@...il.com>
Cc:	nicolas.ferre@...el.com, davem@...emloft.net,
	hskinnemoen@...il.com, egtvedt@...fundet.no, bgat@...lgatliff.com,
	netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/5] net/at91_ether: move eth addr quirk into csb337
 board setup

On 16:23 Sun 21 Oct     , Joachim Eastwood wrote:
> Move Ethernet address byte order fix for csb337 into it's board
> setup.
> 
> This will allow us to remove the last mach include from at91_ether
> and also to share the address setup with the macb driver.
no the at91rm9200 move to DT this is not compatible with it

you need to pass ths in info via platform_data

and do not touch driver code related stuff in boards

Best Regards,
J.
> 
> Signed-off-by: Joachim Eastwood <manabian@...il.com>
> ---
>  arch/arm/mach-at91/board-csb337.c         | 35 +++++++++++++++++++++++++++++++
>  drivers/net/ethernet/cadence/Kconfig      |  1 -
>  drivers/net/ethernet/cadence/at91_ether.c | 26 ++++++-----------------
>  3 files changed, 41 insertions(+), 21 deletions(-)
> 
> diff --git a/arch/arm/mach-at91/board-csb337.c b/arch/arm/mach-at91/board-csb337.c
> index 3e37437..5522132 100644
> --- a/arch/arm/mach-at91/board-csb337.c
> +++ b/arch/arm/mach-at91/board-csb337.c
> @@ -217,6 +217,40 @@ static struct gpio_led csb_leds[] = {
>  	}
>  };
>  
> +/*
> + * MicroMonitor (uMon) on the CSB337 store the ethernet address in the
> + * wrong byte order (and continues to do so, for bug-compatibility).
> + */
> +#define MACB_SA1B	0x0098
> +#define MACB_SA1T	0x009c
> +static void __init csb337_fix_eth_addr(void)
> +{
> +	void __iomem *emac;
> +	u32 lo, hi, tmp;
> +	int i;
> +
> +	emac = ioremap(AT91RM9200_BASE_EMAC, SZ_16K);
> +	if (!emac) {
> +		printk(KERN_ERR "csb337: unable to fixup Ethernet address\n");
> +		return;
> +	}
> +
> +	/* Fix byte order on all 4 address registers */
> +	for (i = 0; i < 4; i++) {
> +		lo = readl(emac + MACB_SA1B + i * 8);
> +		hi = readl(emac + MACB_SA1T + i * 8);
> +
> +		tmp = (lo & 0xff) << 8 | (lo & 0xff00) >> 8;
> +		writel(tmp, emac + MACB_SA1T + i * 8);
> +
> +		tmp = (hi & 0xff) << 8 | (hi & 0xff00) >> 8
> +			| (lo & 0xff0000) << 8
> +			| (lo & 0xff000000) >> 8;
> +		writel(tmp, emac + MACB_SA1B + i * 8);
> +	}
> +
> +	iounmap(emac);
> +}
>  
>  static void __init csb337_board_init(void)
>  {
> @@ -225,6 +259,7 @@ static void __init csb337_board_init(void)
>  	at91_register_uart(0, 0, 0);
>  	at91_add_device_serial();
>  	/* Ethernet */
> +	csb337_fix_eth_addr();
>  	at91_add_device_eth(&csb337_eth_data);
>  	/* USB Host */
>  	at91_add_device_usbh(&csb337_usbh_data);
> diff --git a/drivers/net/ethernet/cadence/Kconfig b/drivers/net/ethernet/cadence/Kconfig
> index f6d0956..40172d1 100644
> --- a/drivers/net/ethernet/cadence/Kconfig
> +++ b/drivers/net/ethernet/cadence/Kconfig
> @@ -21,7 +21,6 @@ if NET_CADENCE
>  
>  config ARM_AT91_ETHER
>  	tristate "AT91RM9200 Ethernet support"
> -	depends on ARM && ARCH_AT91RM9200
>  	select NET_CORE
>  	select MACB
>  	---help---
> diff --git a/drivers/net/ethernet/cadence/at91_ether.c b/drivers/net/ethernet/cadence/at91_ether.c
> index 375d272..5ed1a63 100644
> --- a/drivers/net/ethernet/cadence/at91_ether.c
> +++ b/drivers/net/ethernet/cadence/at91_ether.c
> @@ -32,8 +32,6 @@
>  #include <linux/phy.h>
>  #include <linux/io.h>
>  
> -#include <asm/mach-types.h>
> -
>  #include "macb.h"
>  
>  #define DRV_NAME	"at91_ether"
> @@ -55,30 +53,18 @@
>   *   U-Boot on the AT91RM9200-DK do not do this.
>   *
>   * - Likewise it must store the addresses in the correct byte order.
> - *   MicroMonitor (uMon) on the CSB337 does this incorrectly (and
> - *   continues to do so, for bug-compatibility).
>   */
>  
>  static short __init unpack_mac_address(struct net_device *dev, unsigned int hi, unsigned int lo)
>  {
>  	char addr[6];
>  
> -	if (machine_is_csb337()) {
> -		addr[5] = (lo & 0xff);			/* The CSB337 bootloader stores the MAC the wrong-way around */
> -		addr[4] = (lo & 0xff00) >> 8;
> -		addr[3] = (lo & 0xff0000) >> 16;
> -		addr[2] = (lo & 0xff000000) >> 24;
> -		addr[1] = (hi & 0xff);
> -		addr[0] = (hi & 0xff00) >> 8;
> -	}
> -	else {
> -		addr[0] = (lo & 0xff);
> -		addr[1] = (lo & 0xff00) >> 8;
> -		addr[2] = (lo & 0xff0000) >> 16;
> -		addr[3] = (lo & 0xff000000) >> 24;
> -		addr[4] = (hi & 0xff);
> -		addr[5] = (hi & 0xff00) >> 8;
> -	}
> +	addr[0] = (lo & 0xff);
> +	addr[1] = (lo & 0xff00) >> 8;
> +	addr[2] = (lo & 0xff0000) >> 16;
> +	addr[3] = (lo & 0xff000000) >> 24;
> +	addr[4] = (hi & 0xff);
> +	addr[5] = (hi & 0xff00) >> 8;
>  
>  	if (is_valid_ether_addr(addr)) {
>  		memcpy(dev->dev_addr, &addr, 6);
> -- 
> 1.7.12.4
> 
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