ns9xxx: prepare for adding support for Digi ns921x processors

The hardware team changed some things that were taken as being common to
all ns9xxx processors up to now.

This patch addresses:

- irqs: s/IRQ_/IRQ_NS9360_/

- system module registers: some registers are still general, their
  definition lives now in include/asm-arm/arch-ns9xxx/regs-sys-common.h.
  The ns9360 specific ones are in .../regs-sys-ns9360.h
  As a result ns9360_systemclock cannot be static inline any more as its
  definition needs regs-sys-ns9360.h.  This becomes a real problem when
  adding support for ns9215 as this will need regs-sys-ns9215.h and
  including both files will not work.  For the same reason
  ns9360_reset() is now non-inline and gpio functions live in their own
  file.

- register mapping: s/ns9xxx_map_io/ns9360_map_io/

- timer registers:  move time.c to time-ns9360.c;
  s/ns9xxx_timer/ns9360_timer/

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>

7 files changed, 113 insertions, 134 deletions

diff --git a/include/asm-arm/arch-ns9xxx/clock.h b/include/asm-arm/arch-ns9xxx/clock.h
deleted file mode 100644
index b943d3a92a1..00000000000
--- a/include/asm-arm/arch-ns9xxx/clock.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * include/asm-arm/arch-ns9xxx/clock.h
- *
- * Copyright (C) 2007 by Digi International Inc.
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- */
-#ifndef __ASM_ARCH_CLOCK_H
-#define __ASM_ARCH_CLOCK_H
-
-#include <asm/arch-ns9xxx/regs-sys.h>
-
-#define CRYSTAL 29491200 /* Hz */
-
-/* The HRM calls this value f_vco */
-static inline u32 ns9xxx_systemclock(void) __attribute__((const));
-static inline u32 ns9xxx_systemclock(void)
-{
-	u32 pll = __raw_readl(SYS_PLL);
-
-	/*
-	 * The system clock should be a multiple of HZ * TIMERCLOCKSELECT (in
-	 * time.c).
-	 *
-	 * The following values are given:
-	 *   - TIMERCLOCKSELECT == 2^i for an i in {0 .. 6}
-	 *   - CRYSTAL == 29491200 == 2^17 * 3^2 * 5^2
-	 *   - ND in {0 .. 31}
-	 *   - FS in {0 .. 3}
-	 *
-	 * Assuming the worst, we consider:
-	 *   - TIMERCLOCKSELECT == 64
-	 *   - ND == 0
-	 *   - FS == 3
-	 *
-	 * So HZ should be a divisor of:
-	 *      (CRYSTAL * (ND + 1) >> FS) / TIMERCLOCKSELECT
-	 *   == (2^17 * 3^2 * 5^2 * 1 >> 3) / 64
-	 *   == 2^8 * 3^2 * 5^2
-	 *   == 57600
-	 *
-	 * Currently HZ is defined to be 100 for this platform.
-	 *
-	 * Fine.
-	 */
-	return CRYSTAL * (REGGETIM(pll, SYS_PLL, ND) + 1)
-		>> REGGETIM(pll, SYS_PLL, FS);
-}
-
-static inline u32 ns9xxx_cpuclock(void) __attribute__((const));
-static inline u32 ns9xxx_cpuclock(void)
-{
-	return ns9xxx_systemclock() / 2;
-}
-
-static inline u32 ns9xxx_ahbclock(void) __attribute__((const));
-static inline u32 ns9xxx_ahbclock(void)
-{
-	return ns9xxx_systemclock() / 4;
-}
-
-static inline u32 ns9xxx_bbusclock(void) __attribute__((const));
-static inline u32 ns9xxx_bbusclock(void)
-{
-	return ns9xxx_systemclock() / 8;
-}
-
-#endif /* ifndef __ASM_ARCH_CLOCK_H */
diff --git a/include/asm-arm/arch-ns9xxx/entry-macro.S b/include/asm-arm/arch-ns9xxx/entry-macro.S
index 5c706dd2379..89a21c53046 100644
--- a/include/asm-arm/arch-ns9xxx/entry-macro.S
+++ b/include/asm-arm/arch-ns9xxx/entry-macro.S
@@ -1,7 +1,7 @@
 /*
  * include/asm-arm/arch-ns9xxx/entry-macro.S
  *
- * Copyright (C) 2006 by Digi International Inc.
+ * Copyright (C) 2006,2007 by Digi International Inc.
  * All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -9,7 +9,7 @@
  * the Free Software Foundation.
  */
 #include <asm/hardware.h>
-#include <asm/arch-ns9xxx/regs-sys.h>
+#include <asm/arch-ns9xxx/regs-sys-common.h>
 
 		.macro	get_irqnr_preamble, base, tmp
 		ldr	\base, =SYS_ISRADDR
diff --git a/include/asm-arm/arch-ns9xxx/irqs.h b/include/asm-arm/arch-ns9xxx/irqs.h
index 25d8d28b27f..e83d48ec42c 100644
--- a/include/asm-arm/arch-ns9xxx/irqs.h
+++ b/include/asm-arm/arch-ns9xxx/irqs.h
@@ -1,7 +1,7 @@
 /*
  * include/asm-arm/arch-ns9xxx/irqs.h
  *
- * Copyright (C) 2006 by Digi International Inc.
+ * Copyright (C) 2006,2007 by Digi International Inc.
  * All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -11,38 +11,39 @@
 #ifndef __ASM_ARCH_IRQS_H
 #define __ASM_ARCH_IRQS_H
 
-#define IRQ_WATCHDOG	0
-#define IRQ_AHBBUSERR	1
-#define IRQ_BBUSAGG	2
+/* NetSilicon 9360 */
+#define IRQ_NS9XXX_WATCHDOG	0
+#define IRQ_NS9XXX_AHBBUSERR	1
+#define IRQ_NS9360_BBUSAGG	2
 /* irq 3 is reserved for NS9360 */
-#define IRQ_ETHRX	4
-#define IRQ_ETHTX	5
-#define IRQ_ETHPHY	6
-#define IRQ_LCD		7
-#define IRQ_SERBRX	8
-#define IRQ_SERBTX	9
-#define IRQ_SERARX	10
-#define IRQ_SERATX	11
-#define IRQ_SERCRX	12
-#define IRQ_SERCTX	13
-#define IRQ_I2C		14
-#define IRQ_BBUSDMA	15
-#define IRQ_TIMER0	16
-#define IRQ_TIMER1	17
-#define IRQ_TIMER2	18
-#define IRQ_TIMER3	19
-#define IRQ_TIMER4	20
-#define IRQ_TIMER5	21
-#define IRQ_TIMER6	22
-#define IRQ_TIMER7	23
-#define IRQ_RTC		24
-#define IRQ_USBHOST	25
-#define IRQ_USBDEVICE	26
-#define IRQ_IEEE1284	27
-#define IRQ_EXT0	28
-#define IRQ_EXT1	29
-#define IRQ_EXT2	30
-#define IRQ_EXT3	31
+#define IRQ_NS9XXX_ETHRX	4
+#define IRQ_NS9XXX_ETHTX	5
+#define IRQ_NS9XXX_ETHPHY	6
+#define IRQ_NS9360_LCD		7
+#define IRQ_NS9360_SERBRX	8
+#define IRQ_NS9360_SERBTX	9
+#define IRQ_NS9360_SERARX	10
+#define IRQ_NS9360_SERATX	11
+#define IRQ_NS9360_SERCRX	12
+#define IRQ_NS9360_SERCTX	13
+#define IRQ_NS9360_I2C		14
+#define IRQ_NS9360_BBUSDMA	15
+#define IRQ_NS9360_TIMER0	16
+#define IRQ_NS9360_TIMER1	17
+#define IRQ_NS9360_TIMER2	18
+#define IRQ_NS9360_TIMER3	19
+#define IRQ_NS9360_TIMER4	20
+#define IRQ_NS9360_TIMER5	21
+#define IRQ_NS9360_TIMER6	22
+#define IRQ_NS9360_TIMER7	23
+#define IRQ_NS9360_RTC		24
+#define IRQ_NS9360_USBHOST	25
+#define IRQ_NS9360_USBDEVICE	26
+#define IRQ_NS9360_IEEE1284	27
+#define IRQ_NS9XXX_EXT0		28
+#define IRQ_NS9XXX_EXT1		29
+#define IRQ_NS9XXX_EXT2		30
+#define IRQ_NS9XXX_EXT3		31
 
 #define BBUS_IRQ(irq)	(32 + irq)
 
@@ -67,7 +68,7 @@
 /*
  * these Interrupts are specific for the a9m9750dev board.
  * They are generated by an FPGA that interrupts the CPU on
- * IRQ_EXT2
+ * IRQ_NS9360_EXT2
  */
 #define FPGA_IRQ(irq)	(64 + irq)
 
diff --git a/include/asm-arm/arch-ns9xxx/processor-ns9360.h b/include/asm-arm/arch-ns9xxx/processor-ns9360.h
new file mode 100644
index 00000000000..f3aa6c50dbe
--- /dev/null
+++ b/include/asm-arm/arch-ns9xxx/processor-ns9360.h
@@ -0,0 +1,32 @@
+/*
+ * include/asm-arm/arch-ns9xxx/processor-ns9360.h
+ *
+ * Copyright (C) 2007 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#ifndef __ASM_ARCH_PROCESSORNS9360_H
+#define __ASM_ARCH_PROCESSORNS9360_H
+
+#include <linux/init.h>
+
+void ns9360_reset(char mode);
+
+unsigned long ns9360_systemclock(void) __attribute__((const));
+
+static inline unsigned long ns9360_cpuclock(void) __attribute__((const));
+static inline unsigned long ns9360_cpuclock(void)
+{
+	return ns9360_systemclock() / 2;
+}
+
+void __init ns9360_map_io(void);
+
+extern struct sys_timer ns9360_timer;
+
+int ns9360_gpio_configure(unsigned gpio, int inv, int func);
+
+#endif /* ifndef __ASM_ARCH_PROCESSORNS9360_H */
diff --git a/include/asm-arm/arch-ns9xxx/regs-sys-common.h b/include/asm-arm/arch-ns9xxx/regs-sys-common.h
new file mode 100644
index 00000000000..956c57cb781
--- /dev/null
+++ b/include/asm-arm/arch-ns9xxx/regs-sys-common.h
@@ -0,0 +1,31 @@
+/*
+ * include/asm-arm/arch-ns9xxx/regs-sys-common.h
+ *
+ * Copyright (C) 2007 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#ifndef __ASM_ARCH_REGSSYSCOMMON_H
+#define __ASM_ARCH_REGSSYSCOMMON_H
+#include <asm/hardware.h>
+
+/* Interrupt Vector Address Register Level x */
+#define SYS_IVA(x)	__REG2(0xa09000c4, (x))
+
+/* Interrupt Configuration registers */
+#define SYS_IC(x)	__REG2(0xa0900144, (x))
+
+/* ISRADDR */
+#define SYS_ISRADDR     __REG(0xa0900164)
+
+/* Interrupt Status Active */
+#define SYS_ISA		__REG(0xa0900168)
+
+/* Interrupt Status Raw */
+#define SYS_ISR		__REG(0xa090016c)
+
+#endif /* ifndef __ASM_ARCH_REGSSYSCOMMON_H */
diff --git a/include/asm-arm/arch-ns9xxx/regs-sys.h b/include/asm-arm/arch-ns9xxx/regs-sys-ns9360.h
index 749262f8620..318b6945afb 100644
--- a/include/asm-arm/arch-ns9xxx/regs-sys.h
+++ b/include/asm-arm/arch-ns9xxx/regs-sys-ns9360.h
@@ -1,15 +1,15 @@
 /*
- * include/asm-arm/arch-ns9xxx/regs-sys.h
+ * include/asm-arm/arch-ns9xxx/regs-sys-ns9360.h
  *
- * Copyright (C) 2006 by Digi International Inc.
+ * Copyright (C) 2006,2007 by Digi International Inc.
  * All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  */
-#ifndef __ASM_ARCH_REGSSYS_H
-#define __ASM_ARCH_REGSSYS_H
+#ifndef __ASM_ARCH_REGSSYSNS9360_H
+#define __ASM_ARCH_REGSSYSNS9360_H
 
 #include <asm/hardware.h>
 
@@ -27,21 +27,6 @@
 /* Timer x Read register */
 #define SYS_TR(x)	__REG2(0xa0900084, (x))
 
-/* Interrupt Vector Address Register Level x */
-#define SYS_IVA(x)	__REG2(0xa09000c4, (x))
-
-/* Interrupt Configuration registers */
-#define SYS_IC(x)	__REG2(0xa0900144, (x))
-
-/* ISRADDR */
-#define SYS_ISRADDR	__REG(0xa0900164)
-
-/* Interrupt Status Active */
-#define SYS_ISA		__REG(0xa0900168)
-
-/* Interrupt Status Raw */
-#define SYS_ISR		__REG(0xa090016c)
-
 /* Timer Interrupt Status register */
 #define SYS_TIS		__REG(0xa0900170)
 
@@ -160,4 +145,4 @@
 #define SYS_EIC_LVEDG_LEVEL		__REGVAL(SYS_EIC_LVEDG, 0)
 #define SYS_EIC_LVEDG_EDGE		__REGVAL(SYS_EIC_LVEDG, 1)
 
-#endif /* ifndef __ASM_ARCH_REGSSYS_H */
+#endif /* ifndef __ASM_ARCH_REGSSYSNS9360_H */
diff --git a/include/asm-arm/arch-ns9xxx/system.h b/include/asm-arm/arch-ns9xxx/system.h
index c1082bd8977..1348073afe4 100644
--- a/include/asm-arm/arch-ns9xxx/system.h
+++ b/include/asm-arm/arch-ns9xxx/system.h
@@ -1,7 +1,7 @@
 /*
  * include/asm-arm/arch-ns9xxx/system.h
  *
- * Copyright (C) 2006 by Digi International Inc.
+ * Copyright (C) 2006,2007 by Digi International Inc.
  * All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -12,8 +12,8 @@
 #define __ASM_ARCH_SYSTEM_H
 
 #include <asm/proc-fns.h>
-#include <asm/arch-ns9xxx/regs-sys.h>
-#include <asm/mach-types.h>
+#include <asm/arch-ns9xxx/processor.h>
+#include <asm/arch-ns9xxx/processor-ns9360.h>
 
 static inline void arch_idle(void)
 {
@@ -22,11 +22,12 @@ static inline void arch_idle(void)
 
 static inline void arch_reset(char mode)
 {
-	u32 reg;
-
-	reg = __raw_readl(SYS_PLL) >> 16;
-	REGSET(reg, SYS_PLL, SWC, YES);
-	__raw_writel(reg, SYS_PLL);
+#ifdef CONFIG_PROCESSOR_NS9360
+	if (processor_is_ns9360())
+		ns9360_reset(mode);
+	else
+#endif
+		BUG();
 
 	BUG();
 }