[v2,15/21] net: designware: socfpga: Secure register access in MAC driver

From: Chee Hong Ang <chee.hong.ang at intel.com>

Allow MAC driver to access System Manager's EMAC control
registers in non-secure mode.

Signed-off-by: Chee Hong Ang <chee.hong.ang at intel.com>
---
 drivers/net/dwmac_socfpga.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

> From: Chee Hong Ang <chee.hong.ang at intel.com>
> 
> Allow MAC driver to access System Manager's EMAC control registers in non-
> secure mode.
> 
> Signed-off-by: Chee Hong Ang <chee.hong.ang at intel.com>
> ---
>  drivers/net/dwmac_socfpga.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/dwmac_socfpga.c b/drivers/net/dwmac_socfpga.c index
> e93561d..293c660 100644
> --- a/drivers/net/dwmac_socfpga.c
> +++ b/drivers/net/dwmac_socfpga.c
> @@ -17,6 +17,7 @@
>  #include <dm/device_compat.h>
>  #include <linux/err.h>
> 
> +#include <asm/arch/secure_reg_helper.h>
>  #include <asm/arch/system_manager.h>
> 
>  struct dwmac_socfpga_platdata {
> @@ -98,8 +99,8 @@ static int dwmac_socfpga_probe(struct udevice *dev)
>  	reset_assert_bulk(&reset_bulk);
> 
>  	modemask = SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << pdata-
> >reg_shift;
> -	clrsetbits_le32(pdata->phy_intf, modemask,
> -			modereg << pdata->reg_shift);
> +	socfpga_secure_reg_update32((phys_addr_t)pdata->phy_intf,
> modemask,
> +				    modereg << pdata->reg_shift);
> 
>  	reset_release_bulk(&reset_bulk);
> 
> --
> 2.7.4
This MAC driver need to access System Manager's EMAC control register
(secure zone) to configure the PHY interface (GMII/RGMII/RMII).
This should be part of this MAC driver as well.
 I will add/define a high-level API in ATF to be used by this MAC driver
from non-secure world (EL2).
This high-level API (SMC/PSCI calls) will be properly documented in
'include/linux/intel-smc.h'