[3/5] sh_eth: add sh_eth_cpu_data::xdfar_rw flag

Commit Message

Sergei Shtylyov March 24, 2018, 8:09 p.m. UTC

The GEther-like controllers have writeable RDFAR/TDFAR, on the others
they are read-only or just absent (on R-Car). Currently we are calling
sh_eth_is_{gether|rz_fast_ether}() in order to check if these registers
can be written to, however it would be simpler to check the new 'xdfar_rw'
bitfield in the 'struct sh_eth_cpu_data'...

Signed-off-by: Sergei Shtylyov <[e-mail]>

---
 drivers/net/ethernet/renesas/sh_eth.c |   11 +++++++----
 drivers/net/ethernet/renesas/sh_eth.h |    1 +
 2 files changed, 8 insertions(+), 4 deletions(-)

Patch

Index: net-next/drivers/net/ethernet/renesas/sh_eth.c
===================================================================
--- net-next.orig/drivers/net/ethernet/renesas/sh_eth.c
+++ net-next/drivers/net/ethernet/renesas/sh_eth.c
@@ -611,6 +611,7 @@  static struct sh_eth_cpu_data r7s72100_d
 	.rpadir_value   = 2 << 16,
 	.no_trimd	= 1,
 	.no_ade		= 1,
+	.xdfar_rw	= 1,
 	.hw_checksum	= 1,
 	.tsu		= 1,
 };
@@ -659,6 +660,7 @@  static struct sh_eth_cpu_data r8a7740_da
 	.rpadir_value   = 2 << 16,
 	.no_trimd	= 1,
 	.no_ade		= 1,
+	.xdfar_rw	= 1,
 	.hw_checksum	= 1,
 	.tsu		= 1,
 	.select_mii	= 1,
@@ -918,6 +920,7 @@  static struct sh_eth_cpu_data sh7757_dat
 	.rpadir_value   = 2 << 16,
 	.no_trimd	= 1,
 	.no_ade		= 1,
+	.xdfar_rw	= 1,
 	.tsu		= 1,
 	.dual_port	= 1,
 };
@@ -955,6 +958,7 @@  static struct sh_eth_cpu_data sh7734_dat
 	.hw_swap	= 1,
 	.no_trimd	= 1,
 	.no_ade		= 1,
+	.xdfar_rw	= 1,
 	.tsu		= 1,
 	.hw_checksum	= 1,
 	.select_mii	= 1,
@@ -993,6 +997,7 @@  static struct sh_eth_cpu_data sh7763_dat
 	.hw_swap	= 1,
 	.no_trimd	= 1,
 	.no_ade		= 1,
+	.xdfar_rw	= 1,
 	.tsu		= 1,
 	.irq_flags	= IRQF_SHARED,
 	.magic		= 1,
@@ -1301,8 +1306,7 @@  static void sh_eth_ring_format(struct ne
 		/* Rx descriptor address set */
 		if (i == 0) {
 			sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR);
-			if (sh_eth_is_gether(mdp) ||
-			    sh_eth_is_rz_fast_ether(mdp))
+			if (mdp->cd->xdfar_rw)
 				sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR);
 		}
 	}
@@ -1324,8 +1328,7 @@  static void sh_eth_ring_format(struct ne
 		if (i == 0) {
 			/* Tx descriptor address set */
 			sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
-			if (sh_eth_is_gether(mdp) ||
-			    sh_eth_is_rz_fast_ether(mdp))
+			if (mdp->cd->xdfar_rw)
 				sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR);
 		}
 	}
Index: net-next/drivers/net/ethernet/renesas/sh_eth.h
===================================================================
--- net-next.orig/drivers/net/ethernet/renesas/sh_eth.h
+++ net-next/drivers/net/ethernet/renesas/sh_eth.h
@@ -508,6 +508,7 @@  struct sh_eth_cpu_data {
 	unsigned rpadir:1;	/* E-DMAC have RPADIR */
 	unsigned no_trimd:1;	/* E-DMAC DO NOT have TRIMD */
 	unsigned no_ade:1;	/* E-DMAC DO NOT have ADE bit in EESR */
+	unsigned xdfar_rw:1;	/* E-DMAC has writeable RDFAR/TDFAR */
 	unsigned hw_checksum:1;	/* E-DMAC has CSMR */
 	unsigned select_mii:1;	/* EtherC have RMII_MII (MII select register) */
 	unsigned rmiimode:1;	/* EtherC has RMIIMODE register */