MIPS: Lantiq: Add ethernet driver

This patch adds the driver for the ETOP Packet Processing Engine (PPE32)
found inside the XWAY family of Lantiq MIPS SoCs. This driver makes 100MBit
ethernet work. Support for all 8 dma channels, gbit and the embedded switch
found on the ar9/vr9 still needs to be implemented.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Ralph Hempel <ralph.hempel@lantiq.com>
Cc: linux-mips@linux-mips.org
Cc: netdev@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2357/
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

4 files changed, 33 insertions, 2 deletions

diff --git a/arch/mips/include/asm/mach-lantiq/lantiq_platform.h b/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
index 1f1dba6d073..a305f1d0259 100644
--- a/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
+++ b/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
@@ -10,6 +10,7 @@
 #define _LANTIQ_PLATFORM_H__
 
 #include <linux/mtd/partitions.h>
+#include <linux/socket.h>
 
 /* struct used to pass info to the pci core */
 enum {
@@ -43,4 +44,10 @@ struct ltq_pci_data {
         int irq[16];
 };
 
+/* struct used to pass info to network drivers */
+struct ltq_eth_data {
+        struct sockaddr mac;
+        int mii_mode;
+};
+
 #endif
diff --git a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
index 4827afbe373..8a3c6be669d 100644
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -82,8 +82,8 @@
 #define PMU_SWITCH              0x10000000
 
 /* ETOP - ethernet */
-#define LTQ_PPE32_BASE_ADDR     0xBE180000
-#define LTQ_PPE32_SIZE          0x40000
+#define LTQ_ETOP_BASE_ADDR      0x1E180000
+#define LTQ_ETOP_SIZE           0x40000
 
 /* DMA */
 #define LTQ_DMA_BASE_ADDR       0x1E104100
diff --git a/arch/mips/lantiq/xway/devices.c b/arch/mips/lantiq/xway/devices.c
index a71b3b532a0..e09e789dfc2 100644
--- a/arch/mips/lantiq/xway/devices.c
+++ b/arch/mips/lantiq/xway/devices.c
@@ -96,3 +96,26 @@ void __init ltq_register_ase_asc(void)
         platform_device_register_simple("ltq_asc", 0,
                 ltq_ase_asc_resources, ARRAY_SIZE(ltq_ase_asc_resources));
 }
+
+/* ethernet */
+static struct resource ltq_etop_resources = {
+        .name   = "etop",
+        .start  = LTQ_ETOP_BASE_ADDR,
+        .end    = LTQ_ETOP_BASE_ADDR + LTQ_ETOP_SIZE - 1,
+        .flags  = IORESOURCE_MEM,
+};
+
+static struct platform_device ltq_etop = {
+        .name           = "ltq_etop",
+        .resource       = &ltq_etop_resources,
+        .num_resources  = 1,
+};
+
+void __init
+ltq_register_etop(struct ltq_eth_data *eth)
+{
+        if (eth) {
+                ltq_etop.dev.platform_data = eth;
+                platform_device_register(&ltq_etop);
+        }
+}
diff --git a/arch/mips/lantiq/xway/devices.h b/arch/mips/lantiq/xway/devices.h
index d5730842340..e90493471bc 100644
--- a/arch/mips/lantiq/xway/devices.h
+++ b/arch/mips/lantiq/xway/devices.h
@@ -15,5 +15,6 @@
 extern void ltq_register_gpio(void);
 extern void ltq_register_gpio_stp(void);
 extern void ltq_register_ase_asc(void);
+extern void ltq_register_etop(struct ltq_eth_data *eth);
 
 #endif