From 6c690bf15d5b2d29990be952ad3ac0bf06f7dd2a Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Wed, 20 Nov 2013 16:56:50 +0000
Subject: [PATCH] lantiq: fix etop registers
As first reported more than a year ago
(https://lists.openwrt.org/pipermail/openwrt-devel/2012-August/016240.html
and
https://lists.openwrt.org/pipermail/openwrt-devel/2012-August/016241.html),
some of the register definitions of the lantiq etop driver are
incorrect. When OpenWrt is booted with a bootloader which doesn't do
proper network initialization of its own (e.g. brnboot), ethernet won't
work. The patch below changes the register names and addresses to match
the lantiq etop driver included with the recent U-Boot.
At the moment the MII/RMII setting in the lantiq .dts-files has no
effect, since wrong registers are written. Once this patch is applied,
it is necessary to make sure that the MII/RMII setting in the .dts-file
is correct.
v2: fix mangled whitespaces
Signed-off-by: Matti Laakso <malaakso@elisanet.fi>
SVN-Revision: 38880
---
.../0200-NET-fix-etop-registers.patch | 121 ++++++++++++++++++
1 file changed, 121 insertions(+)
create mode 100644 linux/lantiq/patches-3.10/0200-NET-fix-etop-registers.patch
diff --git a/linux/lantiq/patches-3.10/0200-NET-fix-etop-registers.patch b/linux/lantiq/patches-3.10/0200-NET-fix-etop-registers.patch
new file mode 100644
index 0000000000..8502cf39ff
--- /dev/null
+++ b/linux/lantiq/patches-3.10/0200-NET-fix-etop-registers.patch
@@ -0,0 +1,121 @@
+--- a/drivers/net/ethernet/lantiq_etop.c
++++ b/drivers/net/ethernet/lantiq_etop.c
+@@ -47,7 +47,7 @@
+ #include <xway_dma.h>
+ #include <lantiq_platform.h>
+
+-#define LTQ_ETOP_MDIO 0x11804
++#define LTQ_ETOP_MDIO_ACC 0x11804
+ #define MDIO_REQUEST 0x80000000
+ #define MDIO_READ 0x40000000
+ #define MDIO_ADDR_MASK 0x1f
+@@ -56,27 +56,38 @@
+ #define MDIO_REG_OFFSET 0x10
+ #define MDIO_VAL_MASK 0xffff
+
+-#define PPE32_CGEN 0x800
+-#define LQ_PPE32_ENET_MAC_CFG 0x1840
++#define LTQ_ETOP_MDIO_CFG 0x11800
++#define MDIO_CFG_MASK 0x6
++
++#define LTQ_ETOP_CFG 0x11808
++#define LTQ_ETOP_IGPLEN 0x11820
++#define LTQ_ETOP_MAC_CFG 0x11840
+
+ #define LTQ_ETOP_ENETS0 0x11850
+ #define LTQ_ETOP_MAC_DA0 0x1186C
+ #define LTQ_ETOP_MAC_DA1 0x11870
+-#define LTQ_ETOP_CFG 0x16020
+-#define LTQ_ETOP_IGPLEN 0x16080
++
++#define MAC_CFG_MASK 0xfff
++#define MAC_CFG_CGEN (1 << 11)
++#define MAC_CFG_DUPLEX (1 << 2)
++#define MAC_CFG_SPEED (1 << 1)
++#define MAC_CFG_LINK (1 << 0)
+
+ #define MAX_DMA_CHAN 0x8
+ #define MAX_DMA_CRC_LEN 0x4
+ #define MAX_DMA_DATA_LEN 0x600
+
+ #define ETOP_FTCU BIT(28)
+-#define ETOP_MII_MASK 0xf
+-#define ETOP_MII_NORMAL 0xd
+-#define ETOP_MII_REVERSE 0xe
+ #define ETOP_PLEN_UNDER 0x40
+-#define ETOP_CGEN 0x800
+ #define ETOP_CFG_MII0 0x01
+
++#define ETOP_CFG_MASK 0xfff
++#define ETOP_CFG_FEN0 (1 << 8)
++#define ETOP_CFG_SEN0 (1 << 6)
++#define ETOP_CFG_OFF1 (1 << 3)
++#define ETOP_CFG_REMII0 (1 << 1)
++#define ETOP_CFG_OFF0 (1 << 0)
++
+ #define LTQ_GBIT_MDIO_CTL 0xCC
+ #define LTQ_GBIT_MDIO_DATA 0xd0
+ #define LTQ_GBIT_GCTL0 0x68
+@@ -355,16 +366,19 @@ ltq_etop_hw_init(struct net_device *dev)
+ /* force the etops link to the gbit to MII */
+ mii_mode = PHY_INTERFACE_MODE_MII;
+ }
++ ltq_etop_w32_mask(MDIO_CFG_MASK, 0, LTQ_ETOP_MDIO_CFG);
++ ltq_etop_w32_mask(MAC_CFG_MASK, MAC_CFG_CGEN | MAC_CFG_DUPLEX |
++ MAC_CFG_SPEED | MAC_CFG_LINK, LTQ_ETOP_MAC_CFG);
+
+ switch (mii_mode) {
+ case PHY_INTERFACE_MODE_RMII:
+- ltq_etop_w32_mask(ETOP_MII_MASK,
+- ETOP_MII_REVERSE, LTQ_ETOP_CFG);
++ ltq_etop_w32_mask(ETOP_CFG_MASK, ETOP_CFG_REMII0 | ETOP_CFG_OFF1 |
++ ETOP_CFG_SEN0 | ETOP_CFG_FEN0, LTQ_ETOP_CFG);
+ break;
+
+ case PHY_INTERFACE_MODE_MII:
+- ltq_etop_w32_mask(ETOP_MII_MASK,
+- ETOP_MII_NORMAL, LTQ_ETOP_CFG);
++ ltq_etop_w32_mask(ETOP_CFG_MASK, ETOP_CFG_OFF1 |
++ ETOP_CFG_SEN0 | ETOP_CFG_FEN0, LTQ_ETOP_CFG);
+ break;
+
+ default:
+@@ -385,9 +399,6 @@ ltq_etop_hw_init(struct net_device *dev)
+ return -ENOTSUPP;
+ }
+
+- /* enable crc generation */
+- ltq_etop_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG);
+-
+ return 0;
+ }
+
+@@ -521,9 +532,9 @@ ltq_etop_mdio_wr(struct mii_bus *bus, in
+ ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET) |
+ phy_data;
+
+- while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
++ while (ltq_etop_r32(LTQ_ETOP_MDIO_ACC) & MDIO_REQUEST)
+ ;
+- ltq_etop_w32(val, LTQ_ETOP_MDIO);
++ ltq_etop_w32(val, LTQ_ETOP_MDIO_ACC);
+ return 0;
+ }
+
+@@ -534,12 +545,12 @@ ltq_etop_mdio_rd(struct mii_bus *bus, in
+ ((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
+ ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET);
+
+- while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
++ while (ltq_etop_r32(LTQ_ETOP_MDIO_ACC) & MDIO_REQUEST)
+ ;
+- ltq_etop_w32(val, LTQ_ETOP_MDIO);
+- while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
++ ltq_etop_w32(val, LTQ_ETOP_MDIO_ACC);
++ while (ltq_etop_r32(LTQ_ETOP_MDIO_ACC) & MDIO_REQUEST)
+ ;
+- val = ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_VAL_MASK;
++ val = ltq_etop_r32(LTQ_ETOP_MDIO_ACC) & MDIO_VAL_MASK;
+ return val;
+ }
+
--
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