[ARM] add Marvell 78xx0 ARM SoC support

The Marvell Discovery Duo (MV78xx0) is a family of ARM SoCs featuring
(depending on the model) one or two Feroceon CPU cores with 512K of L2
cache and VFP coprocessors running at (depending on the model) between
800 MHz and 1.2 GHz, and features a DDR2 controller, two PCIe
interfaces that can each run either in x4 or quad x1 mode, three USB
2.0 interfaces, two 3Gb/s SATA II interfaces, a SPI interface, two
TWSI interfaces, a crypto accelerator, IDMA/XOR engines, a SPI
interface, four UARTs, and depending on the model, two or four gigabit
ethernet interfaces.

This patch adds basic support for the platform, and allows booting
on the MV78x00 development board, with functional UARTs, SATA, PCIe,
GigE and USB ports.

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

12 files changed, 436 insertions, 0 deletions

diff --git a/include/asm-arm/arch-mv78xx0/debug-macro.S b/include/asm-arm/arch-mv78xx0/debug-macro.S
new file mode 100644
index 000000000000..d0595bd645e5
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/debug-macro.S
@@ -0,0 +1,20 @@
+/*
+ * include/asm-arm/arch-mv78xx0/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/mv78xx0.h>
+
+        .macro  addruart,rx
+        mrc     p15, 0, \rx, c1, c0
+        tst     \rx, #1                                 @ MMU enabled?
+        ldreq   \rx, =MV78XX0_REGS_PHYS_BASE
+        ldrne   \rx, =MV78XX0_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-mv78xx0/dma.h b/include/asm-arm/arch-mv78xx0/dma.h
new file mode 100644
index 000000000000..40a8c178f10d
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/dma.h
@@ -0,0 +1 @@
+/* empty */
diff --git a/include/asm-arm/arch-mv78xx0/entry-macro.S b/include/asm-arm/arch-mv78xx0/entry-macro.S
new file mode 100644
index 000000000000..e9a606b12669
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/entry-macro.S
@@ -0,0 +1,39 @@
+/*
+ * include/asm-arm/arch-mv78xx0/entry-macro.S
+ *
+ * Low-level IRQ helper macros for Marvell MV78xx0 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/mv78xx0.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
+        @ check low interrupts
+        ldr     \irqstat, [\base, #IRQ_CAUSE_LOW_OFF]
+        ldr     \tmp, [\base, #IRQ_MASK_LOW_OFF]
+        mov     \irqnr, #31
+        ands    \irqstat, \irqstat, \tmp
+
+        @ if no low interrupts set, check high interrupts
+        ldreq   \irqstat, [\base, #IRQ_CAUSE_HIGH_OFF]
+        ldreq   \tmp, [\base, #IRQ_MASK_HIGH_OFF]
+        moveq   \irqnr, #63
+        andeqs  \irqstat, \irqstat, \tmp
+
+        @ find first active interrupt source
+        clzne   \irqstat, \irqstat
+        subne   \irqnr, \irqnr, \irqstat
+        .endm
diff --git a/include/asm-arm/arch-mv78xx0/hardware.h b/include/asm-arm/arch-mv78xx0/hardware.h
new file mode 100644
index 000000000000..8e17926086c6
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/hardware.h
@@ -0,0 +1,21 @@
+/*
+ * include/asm-arm/arch-mv78xx0/hardware.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_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+#include "mv78xx0.h"
+
+#define pcibios_assign_all_busses()     1
+
+#define PCIBIOS_MIN_IO                  0x00001000
+#define PCIBIOS_MIN_MEM                 0x01000000
+#define PCIMEM_BASE                     MV78XX0_PCIE_MEM_PHYS_BASE /* mem base for VGA */
+
+
+#endif
diff --git a/include/asm-arm/arch-mv78xx0/io.h b/include/asm-arm/arch-mv78xx0/io.h
new file mode 100644
index 000000000000..415d4c98e3d1
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/io.h
@@ -0,0 +1,26 @@
+/*
+ * include/asm-arm/arch-mv78xx0/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 "mv78xx0.h"
+
+#define IO_SPACE_LIMIT          0xffffffff
+
+static inline void __iomem *__io(unsigned long addr)
+{
+        return (void __iomem *)((addr - MV78XX0_PCIE_IO_PHYS_BASE(0))
+                                        + MV78XX0_PCIE_IO_VIRT_BASE(0));
+}
+
+#define __io(a)                 __io(a)
+#define __mem_pci(a)            (a)
+
+
+#endif
diff --git a/include/asm-arm/arch-mv78xx0/irqs.h b/include/asm-arm/arch-mv78xx0/irqs.h
new file mode 100644
index 000000000000..75930450cd65
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/irqs.h
@@ -0,0 +1,91 @@
+/*
+ * include/asm-arm/arch-mv78xx0/irqs.h
+ *
+ * IRQ definitions for Marvell MV78xx0 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 "mv78xx0.h"    /* need GPIO_MAX */
+
+/*
+ * MV78xx0 Low Interrupt Controller
+ */
+#define IRQ_MV78XX0_ERR         0
+#define IRQ_MV78XX0_SPI         1
+#define IRQ_MV78XX0_I2C_0       2
+#define IRQ_MV78XX0_I2C_1       3
+#define IRQ_MV78XX0_IDMA_0      4
+#define IRQ_MV78XX0_IDMA_1      5
+#define IRQ_MV78XX0_IDMA_2      6
+#define IRQ_MV78XX0_IDMA_3      7
+#define IRQ_MV78XX0_TIMER_0     8
+#define IRQ_MV78XX0_TIMER_1     9
+#define IRQ_MV78XX0_TIMER_2     10
+#define IRQ_MV78XX0_TIMER_3     11
+#define IRQ_MV78XX0_UART_0      12
+#define IRQ_MV78XX0_UART_1      13
+#define IRQ_MV78XX0_UART_2      14
+#define IRQ_MV78XX0_UART_3      15
+#define IRQ_MV78XX0_USB_0       16
+#define IRQ_MV78XX0_USB_1       17
+#define IRQ_MV78XX0_USB_2       18
+#define IRQ_MV78XX0_CRYPTO      19
+#define IRQ_MV78XX0_SDIO_0      20
+#define IRQ_MV78XX0_SDIO_1      21
+#define IRQ_MV78XX0_XOR_0       22
+#define IRQ_MV78XX0_XOR_1       23
+#define IRQ_MV78XX0_I2S_0       24
+#define IRQ_MV78XX0_I2S_1       25
+#define IRQ_MV78XX0_SATA        26
+#define IRQ_MV78XX0_TDMI        27
+
+/*
+ * MV78xx0 High Interrupt Controller
+ */
+#define IRQ_MV78XX0_PCIE_00     32
+#define IRQ_MV78XX0_PCIE_01     33
+#define IRQ_MV78XX0_PCIE_02     34
+#define IRQ_MV78XX0_PCIE_03     35
+#define IRQ_MV78XX0_PCIE_10     36
+#define IRQ_MV78XX0_PCIE_11     37
+#define IRQ_MV78XX0_PCIE_12     38
+#define IRQ_MV78XX0_PCIE_13     39
+#define IRQ_MV78XX0_GE00_SUM    40
+#define IRQ_MV78XX0_GE00_RX     41
+#define IRQ_MV78XX0_GE00_TX     42
+#define IRQ_MV78XX0_GE00_MISC   43
+#define IRQ_MV78XX0_GE01_SUM    44
+#define IRQ_MV78XX0_GE01_RX     45
+#define IRQ_MV78XX0_GE01_TX     46
+#define IRQ_MV78XX0_GE01_MISC   47
+#define IRQ_MV78XX0_GE10_SUM    48
+#define IRQ_MV78XX0_GE10_RX     49
+#define IRQ_MV78XX0_GE10_TX     50
+#define IRQ_MV78XX0_GE10_MISC   51
+#define IRQ_MV78XX0_GE11_SUM    52
+#define IRQ_MV78XX0_GE11_RX     53
+#define IRQ_MV78XX0_GE11_TX     54
+#define IRQ_MV78XX0_GE11_MISC   55
+#define IRQ_MV78XX0_GPIO_0_7    56
+#define IRQ_MV78XX0_GPIO_8_15   57
+#define IRQ_MV78XX0_GPIO_16_23  58
+#define IRQ_MV78XX0_GPIO_24_31  59
+#define IRQ_MV78XX0_DB_IN       60
+#define IRQ_MV78XX0_DB_OUT      61
+
+/*
+ * MV78XX0 General Purpose Pins
+ */
+#define IRQ_MV78XX0_GPIO_START  64
+#define NR_GPIO_IRQS            GPIO_MAX
+
+#define NR_IRQS                 (IRQ_MV78XX0_GPIO_START + NR_GPIO_IRQS)
+
+
+#endif
diff --git a/include/asm-arm/arch-mv78xx0/memory.h b/include/asm-arm/arch-mv78xx0/memory.h
new file mode 100644
index 000000000000..721a6b185b91
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/memory.h
@@ -0,0 +1,14 @@
+/*
+ * include/asm-arm/arch-mv78xx0/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-mv78xx0/mv78xx0.h b/include/asm-arm/arch-mv78xx0/mv78xx0.h
new file mode 100644
index 000000000000..9f5d83c73faa
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/mv78xx0.h
@@ -0,0 +1,126 @@
+/*
+ * include/asm-arm/arch-mv78xx0/mv78xx0.h
+ *
+ * Generic definitions for Marvell MV78xx0 SoC flavors:
+ *  MV781x0 and MV782x0.
+ *
+ * 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_MV78XX0_H
+#define __ASM_ARCH_MV78XX0_H
+
+/*
+ * Marvell MV78xx0 address maps.
+ *
+ * phys
+ * c0000000     PCIe Memory space
+ * f0800000     PCIe #0 I/O space
+ * f0900000     PCIe #1 I/O space
+ * f0a00000     PCIe #2 I/O space
+ * f0b00000     PCIe #3 I/O space
+ * f0c00000     PCIe #4 I/O space
+ * f0d00000     PCIe #5 I/O space
+ * f0e00000     PCIe #6 I/O space
+ * f0f00000     PCIe #7 I/O space
+ * f1000000     on-chip peripheral registers
+ *
+ * virt         phys            size
+ * fe400000     f102x000        16K     core-specific peripheral registers
+ * fe700000     f0800000        1M      PCIe #0 I/O space
+ * fe800000     f0900000        1M      PCIe #1 I/O space
+ * fe900000     f0a00000        1M      PCIe #2 I/O space
+ * fea00000     f0b00000        1M      PCIe #3 I/O space
+ * feb00000     f0c00000        1M      PCIe #4 I/O space
+ * fec00000     f0d00000        1M      PCIe #5 I/O space
+ * fed00000     f0e00000        1M      PCIe #6 I/O space
+ * fee00000     f0f00000        1M      PCIe #7 I/O space
+ * fef00000     f1000000        1M      on-chip peripheral registers
+ */
+#define MV78XX0_CORE0_REGS_PHYS_BASE    0xf1020000
+#define MV78XX0_CORE1_REGS_PHYS_BASE    0xf1024000
+#define MV78XX0_CORE_REGS_VIRT_BASE     0xfe400000
+#define MV78XX0_CORE_REGS_SIZE          SZ_16K
+
+#define MV78XX0_PCIE_IO_PHYS_BASE(i)    (0xf0800000 + ((i) << 20))
+#define MV78XX0_PCIE_IO_VIRT_BASE(i)    (0xfe700000 + ((i) << 20))
+#define MV78XX0_PCIE_IO_SIZE            SZ_1M
+
+#define MV78XX0_REGS_PHYS_BASE          0xf1000000
+#define MV78XX0_REGS_VIRT_BASE          0xfef00000
+#define MV78XX0_REGS_SIZE               SZ_1M
+
+#define MV78XX0_PCIE_MEM_PHYS_BASE      0xc0000000
+#define MV78XX0_PCIE_MEM_SIZE           0x30000000
+
+/*
+ * Core-specific peripheral registers.
+ */
+#define BRIDGE_VIRT_BASE        (MV78XX0_CORE_REGS_VIRT_BASE)
+#define  CPU_CONTROL            (BRIDGE_VIRT_BASE | 0x0104)
+#define   L2_WRITETHROUGH       0x00020000
+#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_LOW_OFF     0x0004
+#define   IRQ_CAUSE_HIGH_OFF    0x0008
+#define   IRQ_MASK_LOW_OFF      0x0010
+#define   IRQ_MASK_HIGH_OFF     0x0014
+#define  TIMER_VIRT_BASE        (BRIDGE_VIRT_BASE | 0x0300)
+
+/*
+ * Register Map
+ */
+#define DDR_VIRT_BASE           (MV78XX0_REGS_VIRT_BASE | 0x00000)
+#define  DDR_WINDOW_CPU0_BASE   (DDR_VIRT_BASE | 0x1500)
+#define  DDR_WINDOW_CPU1_BASE   (DDR_VIRT_BASE | 0x1700)
+
+#define DEV_BUS_PHYS_BASE       (MV78XX0_REGS_PHYS_BASE | 0x10000)
+#define DEV_BUS_VIRT_BASE       (MV78XX0_REGS_VIRT_BASE | 0x10000)
+#define  SAMPLE_AT_RESET_LOW    (DEV_BUS_VIRT_BASE | 0x0030)
+#define  SAMPLE_AT_RESET_HIGH   (DEV_BUS_VIRT_BASE | 0x0034)
+#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  UART2_PHYS_BASE        (DEV_BUS_PHYS_BASE | 0x2200)
+#define  UART2_VIRT_BASE        (DEV_BUS_VIRT_BASE | 0x2200)
+#define  UART3_PHYS_BASE        (DEV_BUS_PHYS_BASE | 0x2300)
+#define  UART3_VIRT_BASE        (DEV_BUS_VIRT_BASE | 0x2300)
+
+#define GE10_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0x30000)
+#define GE11_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0x34000)
+
+#define PCIE00_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x40000)
+#define PCIE01_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x44000)
+#define PCIE02_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x48000)
+#define PCIE03_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x4c000)
+
+#define USB0_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0x50000)
+#define USB1_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0x51000)
+#define USB2_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0x52000)
+
+#define GE00_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0x70000)
+#define GE01_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0x74000)
+
+#define PCIE10_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x80000)
+#define PCIE11_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x84000)
+#define PCIE12_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x88000)
+#define PCIE13_VIRT_BASE        (MV78XX0_REGS_VIRT_BASE | 0x8c000)
+
+#define SATA_PHYS_BASE          (MV78XX0_REGS_PHYS_BASE | 0xa0000)
+
+
+#define GPIO_MAX                32
+
+
+#endif
diff --git a/include/asm-arm/arch-mv78xx0/system.h b/include/asm-arm/arch-mv78xx0/system.h
new file mode 100644
index 000000000000..7eb47d376db9
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/system.h
@@ -0,0 +1,37 @@
+/*
+ * include/asm-arm/arch-mv78xx0/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/mv78xx0.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-mv78xx0/timex.h b/include/asm-arm/arch-mv78xx0/timex.h
new file mode 100644
index 000000000000..a854b1ccbd01
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/timex.h
@@ -0,0 +1,9 @@
+/*
+ * include/asm-arm/arch-mv78xx0/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)
diff --git a/include/asm-arm/arch-mv78xx0/uncompress.h b/include/asm-arm/arch-mv78xx0/uncompress.h
new file mode 100644
index 000000000000..3bfe0a293ef7
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/uncompress.h
@@ -0,0 +1,47 @@
+/*
+ * include/asm-arm/arch-mv78xx0/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/mv78xx0.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-mv78xx0/vmalloc.h b/include/asm-arm/arch-mv78xx0/vmalloc.h
new file mode 100644
index 000000000000..f2c512197579
--- /dev/null
+++ b/include/asm-arm/arch-mv78xx0/vmalloc.h
@@ -0,0 +1,5 @@
+/*
+ * include/asm-arm/arch-mv78xx0/vmalloc.h
+ */
+
+#define VMALLOC_END     0xfe000000