[PATCH 04/11] m68k/atari: EtherNAT - platform device and IRQ support code

Michael Schmitz
2013-03-25T06:38:11Z

Add platform device and interrupt definitions necessary for the EtherNAT
Ethernet/USB adapter for the Falcon extension port. EtherNAT interrupt
numbers are 139/140 so the max. interrupt number for Atari has to be
increased.

Signed-off-by: Michael Schmitz <schmitz@debian.org>
---
arch/m68k/atari/config.c | 62 +++++++++++++++++++++++++++++++++++++
arch/m68k/include/asm/atarihw.h | 6 +++
arch/m68k/include/asm/atariints.h | 2 +-
arch/m68k/include/asm/irq.h | 6 +++-
4 files changed, 74 insertions(+), 2 deletions(-)

diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c
index 037c11c..d35e89d 100644
--- a/arch/m68k/atari/config.c
+++ b/arch/m68k/atari/config.c
@@ -31,6 +31,7 @@
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/ioport.h>
+#include <linux/platform_device.h>
#include <linux/vt_kern.h>
#include <linux/module.h>

@@ -655,3 +656,64 @@ static void atari_get_hardware_list(struct seq_file *m)
ATARIHW_ANNOUNCE(VME, "VME Bus");
ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor");
}
+
+/*
+ * MSch: initial platform device support for Atari,
+ * required for EtherNAT/EtherNEC/NetUSBee drivers
+ */
+
+/*
+ * EtherNAT: SMC91C111 Ethernet chipset, handled by smc91x driver
+ */
+
+#define ATARI_ETHERNAT_IRQ 140
+
+static struct resource smc91x_resources[] = {
+ [0] = {
+ .name = "smc91x-regs",
+ .start = ATARI_ETHERNAT_PHYS_ADDR,
+ .end = ATARI_ETHERNAT_PHYS_ADDR + 0xfffff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .name = "smc91x-irq",
+ .start = ATARI_ETHERNAT_IRQ,
+ .end = ATARI_ETHERNAT_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device smc91x_device = {
+ .name = "smc91x",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(smc91x_resources),
+ .resource = smc91x_resources,
+};
+
+static struct platform_device *atari_ethernat_devices[] __initdata = {
+ &smc91x_device
+};
+
+int __init atari_platform_init(void)
+{
+ int rv = 0;
+
+ if (!MACH_IS_ATARI)
+ return -ENODEV;
+
+#ifdef CONFIG_ATARI_ETHERNAT
+ {
+ unsigned char *enatc_virt;
+ enatc_virt = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0xf);
+ if (hwreg_present(enatc_virt)) {
+ rv = platform_add_devices(atari_ethernat_devices,
+ ARRAY_SIZE(atari_ethernat_devices));
+ }
+ iounmap(enatc_virt);
+ }
+#endif
+
+ return rv;
+}
+
+arch_initcall(atari_platform_init);
diff --git a/arch/m68k/include/asm/atarihw.h b/arch/m68k/include/asm/atarihw.h
index c0cb363..d887050 100644
--- a/arch/m68k/include/asm/atarihw.h
+++ b/arch/m68k/include/asm/atarihw.h
@@ -805,5 +805,11 @@ struct MSTE_RTC {

#define mste_rtc ((*(volatile struct MSTE_RTC *)MSTE_RTC_BAS))

+/*
+** EtherNAT add-on card for Falcon - combined ethernet and USB adapter
+*/
+
+#define ATARI_ETHERNAT_PHYS_ADDR 0x80000000
+
#endif /* linux/atarihw.h */

diff --git a/arch/m68k/include/asm/atariints.h b/arch/m68k/include/asm/atariints.h
index 8f71504..953e0ac 100644
--- a/arch/m68k/include/asm/atariints.h
+++ b/arch/m68k/include/asm/atariints.h
@@ -32,7 +32,7 @@
#define VME_SOURCE_BASE 56
#define VME_MAX_SOURCES 16

-#define NUM_ATARI_SOURCES (VME_SOURCE_BASE+VME_MAX_SOURCES-STMFP_SOURCE_BASE)
+#define NUM_ATARI_SOURCES 141

/* convert vector number to int source number */
#define IRQ_VECTOR_TO_SOURCE(v) ((v) - ((v) < 0x20 ? 0x18 : (0x40-8)))
diff --git a/arch/m68k/include/asm/irq.h b/arch/m68k/include/asm/irq.h
index c1155f0..81ca118 100644
--- a/arch/m68k/include/asm/irq.h
+++ b/arch/m68k/include/asm/irq.h
@@ -6,12 +6,16 @@
* different m68k hosts compiled into the kernel.
* Currently the Atari has 72 and the Amiga 24, but if both are
* supported in the kernel it is better to make room for 72.
+ * With EtherNAT add-on card on Atari, the highest interrupt
+ * number is 140 so NR_IRQS needs to be 141.
*/
#if defined(CONFIG_COLDFIRE)
#define NR_IRQS 256
#elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
#define NR_IRQS 200
-#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
+#elif defined(CONFIG_ATARI)
+#define NR_IRQS 141
+#elif defined(CONFIG_MAC)
#define NR_IRQS 72
#elif defined(CONFIG_Q40)
#define NR_IRQS 43
--
1.7.0.4