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net: ll_temac: Add support for non-native register endianness

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Replace the powerpc specific MMIO register access functions with the
generic big-endian mmio access functions, and add support for
little-endian access depending on configuration.

Big-endian access is maintained as the default, but little-endian can
be configured in device-tree binding or in platform data.

The temac_ior()/temac_iow() functions are replaced with macro wrappers
to avoid modifying existing code more than necessary.

Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Esben Haabendal
2019-04-30 09:17:51 +02:00
committed by David S. Miller
parent d84aec4215
commit a3246dc41a
3 changed files with 79 additions and 22 deletions
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12
drivers/net/ethernet/xilinx/ll_temac.h
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@@ -347,8 +347,10 @@ struct temac_local {
#ifdef CONFIG_PPC_DCR
dcr_host_t sdma_dcrs;
#endif
u32 (*dma_in)(struct temac_local *, int);
void (*dma_out)(struct temac_local *, int, u32);
u32 (*temac_ior)(struct temac_local *lp, int offset);
void (*temac_iow)(struct temac_local *lp, int offset, u32 value);
u32 (*dma_in)(struct temac_local *lp, int reg);
void (*dma_out)(struct temac_local *lp, int reg, u32 value);
int tx_irq;
int rx_irq;
@@ -372,9 +374,11 @@ struct temac_local {
int rx_bd_ci;
};
/* Wrappers for temac_ior()/temac_iow() function pointers above */
#define temac_ior(lp, o) ((lp)->temac_ior(lp, o))
#define temac_iow(lp, o, v) ((lp)->temac_iow(lp, o, v))
/* xilinx_temac.c */
u32 temac_ior(struct temac_local *lp, int offset);
void temac_iow(struct temac_local *lp, int offset, u32 value);
int temac_indirect_busywait(struct temac_local *lp);
u32 temac_indirect_in32(struct temac_local *lp, int reg);
void temac_indirect_out32(struct temac_local *lp, int reg, u32 value);