Re: [PATCH net-next] sh_eth: fix TSU init on SH7734/R8A7740
From: Sergei Shtylyov
Date: Sat, 24 Feb 2018 22:41:45 +0300
> It appears that the single port Ether controllers having TSU (like SH7734/
> R8A7740) need the same kind of treating in sh_eth_tsu_init() as R7S72100
> currently has -- they also don't have the TSU registers related e.g. to
> passing the frames between ports. Add the 'sh_eth_cpu_data::dual_port'
> flag and use it as a new criterion for taking a "short path" in the TSU
> init sequence in order to avoid writing to the non-existant registers...
>
> Fixes: f0e81fecd4f8 ("net: sh_eth: Add support SH7734")
> Fixes: 73a0d907301e ("net: sh_eth: add support R8A7740")
> Signed-off-by: Sergei Shtylyov
Applied with commit messsage spelling problem fixed.
Thanks.
Re: [PATCH net-next] sh_eth: fix TSU init on SH7734/R8A7740
On 02/24/2018 10:41 PM, Sergei Shtylyov wrote:
> It appears that the single port Ether controllers having TSU (like SH7734/
> R8A7740) need the same kind of treating in sh_eth_tsu_init() as R7S72100
> currently has -- they also don't have the TSU registers related e.g. to
> passing the frames between ports. Add the 'sh_eth_cpu_data::dual_port'
> flag and use it as a new criterion for taking a "short path" in the TSU
> init sequence in order to avoid writing to the non-existant registers...
Spell checker tells it should have been "non-existent" -- would it be
possible
to fix while merging?
> Fixes: f0e81fecd4f8 ("net: sh_eth: Add support SH7734")
> Fixes: 73a0d907301e ("net: sh_eth: add support R8A7740")
> Signed-off-by: Sergei Shtylyov
[...]
MBR, Sergei
Re: [PATCH net-next] sh_eth: fix TSU init on SH7734/R8A7740
Hi Sergei,
On Sat, Feb 24, 2018 at 8:41 PM, Sergei Shtylyov
wrote:
> It appears that the single port Ether controllers having TSU (like SH7734/
> R8A7740) need the same kind of treating in sh_eth_tsu_init() as R7S72100
> currently has -- they also don't have the TSU registers related e.g. to
> passing the frames between ports. Add the 'sh_eth_cpu_data::dual_port'
> flag and use it as a new criterion for taking a "short path" in the TSU
> init sequence in order to avoid writing to the non-existant registers...
>
> Fixes: f0e81fecd4f8 ("net: sh_eth: Add support SH7734")
> Fixes: 73a0d907301e ("net: sh_eth: add support R8A7740")
> Signed-off-by: Sergei Shtylyov
Thanks for your patch!
Ethernet (nfsroot and WoL) is still working fine on r8a7740/armadillo,
which has a single "gether" port.
Tested-by: Geert Uytterhoeven
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
[PATCH net-next] sh_eth: fix TSU init on SH7734/R8A7740
It appears that the single port Ether controllers having TSU (like SH7734/
R8A7740) need the same kind of treating in sh_eth_tsu_init() as R7S72100
currently has -- they also don't have the TSU registers related e.g. to
passing the frames between ports. Add the 'sh_eth_cpu_data::dual_port'
flag and use it as a new criterion for taking a "short path" in the TSU
init sequence in order to avoid writing to the non-existant registers...
Fixes: f0e81fecd4f8 ("net: sh_eth: Add support SH7734")
Fixes: 73a0d907301e ("net: sh_eth: add support R8A7740")
Signed-off-by: Sergei Shtylyov
---
David, I'm submitting this patch against the 'net-next.git' repo since nothing
seems to explode when writing to the non-existing TSU registers. Whether to
apply this to 'net.git' instead is up to you...
drivers/net/ethernet/renesas/sh_eth.c |6 +-
drivers/net/ethernet/renesas/sh_eth.h |1 +
2 files changed, 6 insertions(+), 1 deletion(-)
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
@@ -752,6 +752,7 @@ static struct sh_eth_cpu_data sh7757_dat
.rpadir = 1,
.rpadir_value = 2 << 16,
.rtrate = 1,
+ .dual_port = 1,
};
#define SH_GIGA_ETH_BASE 0xfee0UL
@@ -830,6 +831,7 @@ static struct sh_eth_cpu_data sh7757_dat
.no_trimd = 1,
.no_ade = 1,
.tsu= 1,
+ .dual_port = 1,
};
/* SH7734 */
@@ -900,6 +902,7 @@ static struct sh_eth_cpu_data sh7763_dat
.tsu= 1,
.irq_flags = IRQF_SHARED,
.magic = 1,
+ .dual_port = 1,
};
static struct sh_eth_cpu_data sh7619_data = {
@@ -932,6 +935,7 @@ static struct sh_eth_cpu_data sh771x_dat
EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
EESIPR_PREIP | EESIPR_CERFIP,
.tsu= 1,
+ .dual_port = 1,
};
static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd)
@@ -2915,7 +2919,7 @@ static int sh_eth_vlan_rx_kill_vid(struc
/* SuperH's TSU register init function */
static void sh_eth_tsu_init(struct sh_eth_private *mdp)
{
- if (sh_eth_is_rz_fast_ether(mdp)) {
+ if (!mdp->cd->dual_port) {
sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL,
TSU_FWSLC);/* Enable POST registers */
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
@@ -509,6 +509,7 @@ struct sh_eth_cpu_data {
unsigned rmiimode:1;/* EtherC has RMIIMODE register */
unsigned rtrate:1; /* EtherC has RTRATE register */
unsigned magic:1; /* EtherC has ECMR.MPDE and ECSR.MPD */
+ unsigned dual_port:1; /* Dual EtherC/E-DMAC */
};
struct sh_eth_private {
