sh_eth: add sh_eth_cpu_data::xdfar_rw flag
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 <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index d4a11ff..294fecd 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -611,6 +611,7 @@ static struct sh_eth_cpu_data r7s72100_data = {
.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_data = {
.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_data_giga = {
.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_data = {
.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_data = {
.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 net_device *ndev)
/* 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 net_device *ndev)
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);
}
}