m68k/atari: EtherNEC - add platform device support

Add platform device for the Atari ROM port ethernet adapter, EtherNEC.
This platform device will be used by the ne.c driver.

[Geert] Conditionalize platform device data structures

Signed-off-by: Michael Schmitz <schmitz@debian.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

2 files changed, 67 insertions, 1 deletions

diff --git a/arch/m68k/Kconfig.devices b/arch/m68k/Kconfig.devices
index d50ecbf6d64f..d163991c5717 100644
--- a/arch/m68k/Kconfig.devices
+++ b/arch/m68k/Kconfig.devices
@@ -65,6 +65,20 @@ config ATARI_ETHERNAT
           To compile the actual ethernet driver, choose Y or M for the SMC91X
           option in the network device section; the module will be called smc91x.
 
+config ATARI_ETHERNEC
+        bool "Atari EtherNEC Ethernet support"
+        depends on ATARI_ROM_ISA
+        ---help---
+          Say Y to include support for the EtherNEC network adapter for the
+          ROM port. The driver works by polling instead of interrupts, so it
+          is quite slow.
+
+          This driver also suppports the ethernet part of the NetUSBee ROM
+          port combined Ethernet/USB adapter.
+
+          To compile the actual ethernet driver, choose Y or M in for the NE2000
+          option in the network device section; the module will be called ne.
+
 endmenu
 
 menu "Character devices"
diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c
index 49d1c750acb0..83ff931ad97a 100644
--- a/arch/m68k/atari/config.c
+++ b/arch/m68k/atari/config.c
@@ -659,7 +659,7 @@ static void atari_get_hardware_list(struct seq_file *m)
 
 /*
  * MSch: initial platform device support for Atari,
- * required for EtherNAT driver
+ * required for EtherNAT/EtherNEC drivers
  */
 
 #ifdef CONFIG_ATARI_ETHERNAT
@@ -696,6 +696,43 @@ static struct platform_device *atari_ethernat_devices[] __initdata = {
 };
 #endif /* CONFIG_ATARI_ETHERNAT */
 
+#ifdef CONFIG_ATARI_ETHERNEC
+/*
+ * EtherNEC: RTL8019 (NE2000 compatible) Ethernet chipset,
+ * handled by ne.c driver
+ */
+
+#define ATARI_ETHERNEC_PHYS_ADDR        0xfffa0000
+#define ATARI_ETHERNEC_BASE             0x300
+#define ATARI_ETHERNEC_IRQ              IRQ_MFP_TIMER1
+
+static struct resource rtl8019_resources[] = {
+        [0] = {
+                .name   = "rtl8019-regs",
+                .start  = ATARI_ETHERNEC_BASE,
+                .end    = ATARI_ETHERNEC_BASE + 0x20 - 1,
+                .flags  = IORESOURCE_IO,
+        },
+        [1] = {
+                .name   = "rtl8019-irq",
+                .start  = ATARI_ETHERNEC_IRQ,
+                .end    = ATARI_ETHERNEC_IRQ,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device rtl8019_device = {
+        .name           = "ne",
+        .id             = -1,
+        .num_resources  = ARRAY_SIZE(rtl8019_resources),
+        .resource       = rtl8019_resources,
+};
+
+static struct platform_device *atari_ethernec_devices[] __initdata = {
+        &rtl8019_device
+};
+#endif /* CONFIG_ATARI_ETHERNEC */
+
 int __init atari_platform_init(void)
 {
         int rv = 0;
@@ -715,6 +752,21 @@ int __init atari_platform_init(void)
         }
 #endif
 
+#ifdef CONFIG_ATARI_ETHERNEC
+        {
+                int error;
+                unsigned char *enec_virt;
+                enec_virt = (unsigned char *)ioremap((ATARI_ETHERNEC_PHYS_ADDR), 0xf);
+                if (hwreg_present(enec_virt)) {
+                        error = platform_add_devices(atari_ethernec_devices,
+                                                ARRAY_SIZE(atari_ethernec_devices));
+                        if (error && !rv)
+                                rv = error;
+                }
+                iounmap(enec_virt);
+        }
+#endif
+
         return rv;
 }