[ARM] add Marvell Loki (88RC8480) SoC support

The Marvell Loki (88RC8480) is an ARM SoC based on a Feroceon CPU
core running at between 400 MHz and 1.0 GHz, and features a 64 bit
DDR controller, 512K of internal SRAM, two x4 PCI-Express ports,
two Gigabit Ethernet ports, two 4x SAS/SATA controllers, two UARTs,
two TWSI controllers, and IDMA/XOR engines.

This patch adds support for the Marvell LB88RC8480 Development
Board, enabling the use of the PCIe interfaces, the ethernet
interfaces, the TWSI interfaces and the UARTs.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

12 files changed, 361 insertions, 0 deletions

diff --git a/include/asm-arm/arch-loki/debug-macro.S b/include/asm-arm/arch-loki/debug-macro.S
new file mode 100644
index 0000000..585502e
--- /dev/null
+++ b/include/asm-arm/arch-loki/debug-macro.S
@@ -0,0 +1,20 @@
+/*
+ * include/asm-arm/arch-loki/debug-macro.S
+ *
+ * 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.
+*/
+
+#include <asm/arch/loki.h>
+
+	.macro	addruart,rx
+	mrc	p15, 0, \rx, c1, c0
+	tst	\rx, #1					@ MMU enabled?
+	ldreq	\rx, =LOKI_REGS_PHYS_BASE
+	ldrne	\rx, =LOKI_REGS_VIRT_BASE
+	orr	\rx, \rx, #0x00012000
+	.endm
+
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>
diff --git a/include/asm-arm/arch-loki/dma.h b/include/asm-arm/arch-loki/dma.h
new file mode 100644
index 0000000..40a8c17
--- /dev/null
+++ b/include/asm-arm/arch-loki/dma.h
@@ -0,0 +1 @@
+/* empty */
diff --git a/include/asm-arm/arch-loki/entry-macro.S b/include/asm-arm/arch-loki/entry-macro.S
new file mode 100644
index 0000000..693257c
--- /dev/null
+++ b/include/asm-arm/arch-loki/entry-macro.S
@@ -0,0 +1,30 @@
+/*
+ * include/asm-arm/arch-loki/entry-macro.S
+ *
+ * Low-level IRQ helper macros for Marvell Loki (88RC8480) platforms
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <asm/arch/loki.h>
+
+	.macro  disable_fiq
+	.endm
+
+	.macro  arch_ret_to_user, tmp1, tmp2
+	.endm
+
+	.macro  get_irqnr_preamble, base, tmp
+	ldr	\base, =IRQ_VIRT_BASE
+	.endm
+
+	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+	ldr	\irqstat, [\base, #IRQ_CAUSE_OFF]
+	ldr	\tmp, [\base, #IRQ_MASK_OFF]
+	mov	\irqnr, #0
+	ands	\irqstat, \irqstat, \tmp
+	clzne	\irqnr, \irqstat
+	rsbne	\irqnr, \irqnr, #31
+	.endm
diff --git a/include/asm-arm/arch-loki/hardware.h b/include/asm-arm/arch-loki/hardware.h
new file mode 100644
index 0000000..f65b01c
--- /dev/null
+++ b/include/asm-arm/arch-loki/hardware.h
@@ -0,0 +1,15 @@
+/*
+ * include/asm-arm/arch-loki/hardware.h
+ *
+ * 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_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+#include "loki.h"
+
+
+#endif
diff --git a/include/asm-arm/arch-loki/io.h b/include/asm-arm/arch-loki/io.h
new file mode 100644
index 0000000..e7418a9
--- /dev/null
+++ b/include/asm-arm/arch-loki/io.h
@@ -0,0 +1,26 @@
+/*
+ * include/asm-arm/arch-loki/io.h
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_ARCH_IO_H
+#define __ASM_ARCH_IO_H
+
+#include "loki.h"
+
+#define IO_SPACE_LIMIT		0xffffffff
+
+static inline void __iomem *__io(unsigned long addr)
+{
+	return (void __iomem *)((addr - LOKI_PCIE0_IO_PHYS_BASE)
+					+ LOKI_PCIE0_IO_VIRT_BASE);
+}
+
+#define __io(a)			__io(a)
+#define __mem_pci(a)		(a)
+
+
+#endif
diff --git a/include/asm-arm/arch-loki/irqs.h b/include/asm-arm/arch-loki/irqs.h
new file mode 100644
index 0000000..7e49714
--- /dev/null
+++ b/include/asm-arm/arch-loki/irqs.h
@@ -0,0 +1,58 @@
+/*
+ * include/asm-arm/arch-loki/irqs.h
+ *
+ * IRQ definitions for Marvell Loki (88RC8480) SoCs
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_ARCH_IRQS_H
+#define __ASM_ARCH_IRQS_H
+
+#include "loki.h"	/* need GPIO_MAX */
+
+/*
+ * Interrupt Controller
+ */
+#define IRQ_LOKI_PCIE_A_CPU_DRBL	0
+#define IRQ_LOKI_CPU_PCIE_A_DRBL	1
+#define IRQ_LOKI_PCIE_B_CPU_DRBL	2
+#define IRQ_LOKI_CPU_PCIE_B_DRBL	3
+#define IRQ_LOKI_COM_A_ERR		6
+#define IRQ_LOKI_COM_A_IN		7
+#define IRQ_LOKI_COM_A_OUT		8
+#define IRQ_LOKI_COM_B_ERR		9
+#define IRQ_LOKI_COM_B_IN		10
+#define IRQ_LOKI_COM_B_OUT		11
+#define IRQ_LOKI_DMA_A			12
+#define IRQ_LOKI_DMA_B			13
+#define IRQ_LOKI_SAS_A			14
+#define IRQ_LOKI_SAS_B			15
+#define IRQ_LOKI_DDR			16
+#define IRQ_LOKI_XOR			17
+#define IRQ_LOKI_BRIDGE			18
+#define IRQ_LOKI_PCIE_A_ERR		20
+#define IRQ_LOKI_PCIE_A_INT		21
+#define IRQ_LOKI_PCIE_B_ERR		22
+#define IRQ_LOKI_PCIE_B_INT		23
+#define IRQ_LOKI_GBE_A_INT		24
+#define IRQ_LOKI_GBE_B_INT		25
+#define IRQ_LOKI_DEV_ERR		26
+#define IRQ_LOKI_UART0			27
+#define IRQ_LOKI_UART1			28
+#define IRQ_LOKI_TWSI			29
+#define IRQ_LOKI_GPIO_23_0		30
+#define IRQ_LOKI_GPIO_25_24		31
+
+/*
+ * Loki General Purpose Pins
+ */
+#define IRQ_LOKI_GPIO_START	32
+#define NR_GPIO_IRQS		GPIO_MAX
+
+#define NR_IRQS			(IRQ_LOKI_GPIO_START + NR_GPIO_IRQS)
+
+
+#endif
diff --git a/include/asm-arm/arch-loki/loki.h b/include/asm-arm/arch-loki/loki.h
new file mode 100644
index 0000000..5dd05ee
--- /dev/null
+++ b/include/asm-arm/arch-loki/loki.h
@@ -0,0 +1,97 @@
+/*
+ * include/asm-arm/arch-loki/loki.h
+ *
+ * Generic definitions for Marvell Loki (88RC8480) SoC flavors
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_ARCH_LOKI_H
+#define __ASM_ARCH_LOKI_H
+
+/*
+ * Marvell Loki (88RC8480) address maps.
+ *
+ * phys
+ * d0000000	on-chip peripheral registers
+ * e0000000	PCIe 0 Memory space
+ * e8000000	PCIe 1 Memory space
+ * f0000000	PCIe 0 I/O space
+ * f0100000	PCIe 1 I/O space
+ *
+ * virt		phys		size
+ * fed00000	d0000000	1M	on-chip peripheral registers
+ * fee00000	f0000000	64K	PCIe 0 I/O space
+ * fef00000	f0100000	64K	PCIe 1 I/O space
+ */
+
+#define LOKI_REGS_PHYS_BASE		0xd0000000
+#define LOKI_REGS_VIRT_BASE		0xfed00000
+#define LOKI_REGS_SIZE			SZ_1M
+
+#define LOKI_PCIE0_IO_PHYS_BASE		0xf0000000
+#define LOKI_PCIE0_IO_VIRT_BASE		0xfee00000
+#define LOKI_PCIE0_IO_BUS_BASE		0x00000000
+#define LOKI_PCIE0_IO_SIZE		SZ_64K
+
+#define LOKI_PCIE1_IO_PHYS_BASE		0xf0100000
+#define LOKI_PCIE1_IO_VIRT_BASE		0xfef00000
+#define LOKI_PCIE1_IO_BUS_BASE		0x00000000
+#define LOKI_PCIE1_IO_SIZE		SZ_64K
+
+#define LOKI_PCIE0_MEM_PHYS_BASE	0xe0000000
+#define LOKI_PCIE0_MEM_SIZE		SZ_128M
+
+#define LOKI_PCIE1_MEM_PHYS_BASE	0xe8000000
+#define LOKI_PCIE1_MEM_SIZE		SZ_128M
+
+/*
+ * Register Map
+ */
+#define DEV_BUS_PHYS_BASE	(LOKI_REGS_PHYS_BASE | 0x10000)
+#define DEV_BUS_VIRT_BASE	(LOKI_REGS_VIRT_BASE | 0x10000)
+#define  UART0_PHYS_BASE	(DEV_BUS_PHYS_BASE | 0x2000)
+#define  UART0_VIRT_BASE	(DEV_BUS_VIRT_BASE | 0x2000)
+#define  UART1_PHYS_BASE	(DEV_BUS_PHYS_BASE | 0x2100)
+#define  UART1_VIRT_BASE	(DEV_BUS_VIRT_BASE | 0x2100)
+
+#define BRIDGE_VIRT_BASE	(LOKI_REGS_VIRT_BASE | 0x20000)
+#define  BRIDGE_REG(x)		(BRIDGE_VIRT_BASE | (x))
+#define  RSTOUTn_MASK		(BRIDGE_VIRT_BASE | 0x0108)
+#define   SOFT_RESET_OUT_EN	0x00000004
+#define  SYSTEM_SOFT_RESET	(BRIDGE_VIRT_BASE | 0x010c)
+#define   SOFT_RESET		0x00000001
+#define  BRIDGE_CAUSE		(BRIDGE_VIRT_BASE | 0x0110)
+#define  BRIDGE_MASK		(BRIDGE_VIRT_BASE | 0x0114)
+#define   BRIDGE_INT_TIMER0	0x0002
+#define   BRIDGE_INT_TIMER1	0x0004
+#define   BRIDGE_INT_TIMER1_CLR	0x0004
+#define  IRQ_VIRT_BASE		(BRIDGE_VIRT_BASE | 0x0200)
+#define   IRQ_CAUSE_OFF		0x0000
+#define   IRQ_MASK_OFF		0x0004
+#define  TIMER_VIRT_BASE	(BRIDGE_VIRT_BASE | 0x0300)
+
+#define PCIE0_VIRT_BASE		(LOKI_REGS_VIRT_BASE | 0x30000)
+
+#define PCIE1_VIRT_BASE		(LOKI_REGS_VIRT_BASE | 0x40000)
+
+#define SAS0_PHYS_BASE		(LOKI_REGS_PHYS_BASE | 0x80000)
+
+#define SAS1_PHYS_BASE		(LOKI_REGS_PHYS_BASE | 0x90000)
+
+#define GE0_PHYS_BASE		(LOKI_REGS_PHYS_BASE | 0xa0000)
+#define GE0_VIRT_BASE		(LOKI_REGS_VIRT_BASE | 0xa0000)
+
+#define GE1_PHYS_BASE		(LOKI_REGS_PHYS_BASE | 0xb0000)
+#define GE1_VIRT_BASE		(LOKI_REGS_VIRT_BASE | 0xb0000)
+
+#define DDR_VIRT_BASE		(LOKI_REGS_VIRT_BASE | 0xf0000)
+#define DDR_REG(x)		(DDR_VIRT_BASE | (x))
+
+
+#define GPIO_MAX		8
+
+
+#endif
diff --git a/include/asm-arm/arch-loki/memory.h b/include/asm-arm/arch-loki/memory.h
new file mode 100644
index 0000000..835101e
--- /dev/null
+++ b/include/asm-arm/arch-loki/memory.h
@@ -0,0 +1,14 @@
+/*
+ * include/asm-arm/arch-loki/memory.h
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#define PHYS_OFFSET		UL(0x00000000)
+
+#define __virt_to_bus(x)	__virt_to_phys(x)
+#define __bus_to_virt(x)	__phys_to_virt(x)
+
+
+#endif
diff --git a/include/asm-arm/arch-loki/system.h b/include/asm-arm/arch-loki/system.h
new file mode 100644
index 0000000..a3568ac
--- /dev/null
+++ b/include/asm-arm/arch-loki/system.h
@@ -0,0 +1,37 @@
+/*
+ * include/asm-arm/arch-loki/system.h
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_ARCH_SYSTEM_H
+#define __ASM_ARCH_SYSTEM_H
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/loki.h>
+
+static inline void arch_idle(void)
+{
+	cpu_do_idle();
+}
+
+static inline void arch_reset(char mode)
+{
+	/*
+	 * Enable soft reset to assert RSTOUTn.
+	 */
+	writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
+
+	/*
+	 * Assert soft reset.
+	 */
+	writel(SOFT_RESET, SYSTEM_SOFT_RESET);
+
+	while (1)
+		;
+}
+
+
+#endif
diff --git a/include/asm-arm/arch-loki/timex.h b/include/asm-arm/arch-loki/timex.h
new file mode 100644
index 0000000..940014f
--- /dev/null
+++ b/include/asm-arm/arch-loki/timex.h
@@ -0,0 +1,11 @@
+/*
+ * include/asm-arm/arch-loki/timex.h
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#define CLOCK_TICK_RATE		(100 * HZ)
+
+#define LOKI_TCLK		180000000
diff --git a/include/asm-arm/arch-loki/uncompress.h b/include/asm-arm/arch-loki/uncompress.h
new file mode 100644
index 0000000..89a0cf8
--- /dev/null
+++ b/include/asm-arm/arch-loki/uncompress.h
@@ -0,0 +1,47 @@
+/*
+ * include/asm-arm/arch-loki/uncompress.h
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/serial_reg.h>
+#include <asm/arch/loki.h>
+
+#define SERIAL_BASE	((unsigned char *)UART0_PHYS_BASE)
+
+static void putc(const char c)
+{
+	unsigned char *base = SERIAL_BASE;
+	int i;
+
+	for (i = 0; i < 0x1000; i++) {
+		if (base[UART_LSR << 2] & UART_LSR_THRE)
+			break;
+		barrier();
+	}
+
+	base[UART_TX << 2] = c;
+}
+
+static void flush(void)
+{
+	unsigned char *base = SERIAL_BASE;
+	unsigned char mask;
+	int i;
+
+	mask = UART_LSR_TEMT | UART_LSR_THRE;
+
+	for (i = 0; i < 0x1000; i++) {
+		if ((base[UART_LSR << 2] & mask) == mask)
+			break;
+		barrier();
+	}
+}
+
+/*
+ * nothing to do
+ */
+#define arch_decomp_setup()
+#define arch_decomp_wdog()
diff --git a/include/asm-arm/arch-loki/vmalloc.h b/include/asm-arm/arch-loki/vmalloc.h
new file mode 100644
index 0000000..f5be062
--- /dev/null
+++ b/include/asm-arm/arch-loki/vmalloc.h
@@ -0,0 +1,5 @@
+/*
+ * include/asm-arm/arch-loki/vmalloc.h
+ */
+
+#define VMALLOC_END	0xfe800000