ARM: Xilinx: Adding Xilinx board support

The 1st board support is minimal to get a system up and running
on the Xilinx platform.

This platform reuses the clock implementation from plat-versatile, and
it depends entirely on CONFIG_OF support.  There is only one board
support file which obtains all device information from a device tree
dtb file which is passed to the kernel at boot time.

Signed-off-by: John Linn <john.linn@xilinx.com>

13 files changed, 387 insertions, 0 deletions

diff --git a/arch/arm/mach-zynq/include/mach/clkdev.h b/arch/arm/mach-zynq/include/mach/clkdev.h
new file mode 100644
index 00000000000..c6e73d81a45
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/clkdev.h
@@ -0,0 +1,32 @@
+/*
+ * arch/arm/mach-zynq/include/mach/clkdev.h
+ *
+ *  Copyright (C) 2011 Xilinx, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __MACH_CLKDEV_H__
+#define __MACH_CLKDEV_H__
+
+#include <plat/clock.h>
+
+struct clk {
+	unsigned long		rate;
+	const struct clk_ops	*ops;
+	const struct icst_params *params;
+	void __iomem		*vcoreg;
+};
+
+#define __clk_get(clk) ({ 1; })
+#define __clk_put(clk) do { } while (0)
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/debug-macro.S b/arch/arm/mach-zynq/include/mach/debug-macro.S
new file mode 100644
index 00000000000..9f664d5eb81
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/debug-macro.S
@@ -0,0 +1,36 @@
+/* arch/arm/mach-zynq/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <mach/zynq_soc.h>
+#include <mach/uart.h>
+
+		.macro	addruart, rp, rv
+		ldr	\rp, =LL_UART_PADDR	@ physical
+		ldr	\rv, =LL_UART_VADDR	@ virtual
+		.endm
+
+		.macro	senduart,rd,rx
+		str	\rd, [\rx, #UART_FIFO_OFFSET]	@ TXDATA
+		.endm
+
+		.macro	waituart,rd,rx
+		.endm
+
+		.macro	busyuart,rd,rx
+1002:		ldr	\rd, [\rx, #UART_SR_OFFSET]	@ get status register
+		tst	\rd, #UART_SR_TXFULL		@
+		bne	1002b			@ wait if FIFO is full
+		.endm
diff --git a/arch/arm/mach-zynq/include/mach/entry-macro.S b/arch/arm/mach-zynq/include/mach/entry-macro.S
new file mode 100644
index 00000000000..3cfc01b3746
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/entry-macro.S
@@ -0,0 +1,30 @@
+/*
+ * arch/arm/mach-zynq/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * based on arch/plat-mxc/include/mach/entry-macro.S
+ *
+ *  Copyright (C) 2007 Lennert Buytenhek <buytenh@wantstofly.org>
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <mach/hardware.h>
+#include <asm/hardware/entry-macro-gic.S>
+
+		.macro  disable_fiq
+		.endm
+
+		.macro  arch_ret_to_user, tmp1, tmp2
+		.endm
diff --git a/arch/arm/mach-zynq/include/mach/hardware.h b/arch/arm/mach-zynq/include/mach/hardware.h
new file mode 100644
index 00000000000..d558d8a94be
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/hardware.h
@@ -0,0 +1,18 @@
+/* arch/arm/mach-zynq/include/mach/hardware.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_HARDWARE_H__
+#define __MACH_HARDWARE_H__
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/io.h b/arch/arm/mach-zynq/include/mach/io.h
new file mode 100644
index 00000000000..39d9885e0e9
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/io.h
@@ -0,0 +1,33 @@
+/* arch/arm/mach-zynq/include/mach/io.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_IO_H__
+#define __MACH_IO_H__
+
+/* Allow IO space to be anywhere in the memory */
+
+#define IO_SPACE_LIMIT 0xffff
+
+/* IO address mapping macros, nothing special at this time but required */
+
+#ifdef __ASSEMBLER__
+#define IOMEM(x)		(x)
+#else
+#define IOMEM(x)		((void __force __iomem *)(x))
+#endif
+
+#define __io(a)			__typesafe_io(a)
+#define __mem_pci(a)		(a)
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/irqs.h b/arch/arm/mach-zynq/include/mach/irqs.h
new file mode 100644
index 00000000000..5fb04fd3bac
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/irqs.h
@@ -0,0 +1,21 @@
+/* arch/arm/mach-zynq/include/mach/irqs.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_IRQS_H
+#define __MACH_IRQS_H
+
+#define ARCH_NR_GPIOS	118
+#define NR_IRQS		(128 + ARCH_NR_GPIOS)
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/memory.h b/arch/arm/mach-zynq/include/mach/memory.h
new file mode 100644
index 00000000000..35a92634dcc
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/memory.h
@@ -0,0 +1,22 @@
+/* arch/arm/mach-zynq/include/mach/memory.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_MEMORY_H__
+#define __MACH_MEMORY_H__
+
+#include <asm/sizes.h>
+
+#define PLAT_PHYS_OFFSET	UL(0x0)
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/system.h b/arch/arm/mach-zynq/include/mach/system.h
new file mode 100644
index 00000000000..1b84d705c67
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/system.h
@@ -0,0 +1,28 @@
+/* arch/arm/mach-zynq/include/mach/system.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_SYSTEM_H__
+#define __MACH_SYSTEM_H__
+
+static inline void arch_idle(void)
+{
+	cpu_do_idle();
+}
+
+static inline void arch_reset(char mode, const char *cmd)
+{
+	/* Add architecture specific reset processing here */
+}
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/timex.h b/arch/arm/mach-zynq/include/mach/timex.h
new file mode 100644
index 00000000000..6c0245e42a5
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/timex.h
@@ -0,0 +1,23 @@
+/* arch/arm/mach-zynq/include/mach/timex.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_TIMEX_H__
+#define __MACH_TIMEX_H__
+
+/* the following is needed for the system to build but will be removed
+   in the future, the value is not important but won't hurt
+*/
+#define CLOCK_TICK_RATE	(100 * HZ)
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/uart.h b/arch/arm/mach-zynq/include/mach/uart.h
new file mode 100644
index 00000000000..5c47c97156f
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/uart.h
@@ -0,0 +1,25 @@
+/* arch/arm/mach-zynq/include/mach/uart.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_UART_H__
+#define __MACH_UART_H__
+
+#define UART_CR_OFFSET		0x00  /* Control Register [8:0] */
+#define UART_SR_OFFSET		0x2C  /* Channel Status [11:0] */
+#define UART_FIFO_OFFSET	0x30  /* FIFO [15:0] or [7:0] */
+
+#define UART_SR_TXFULL		0x00000010	/* TX FIFO full */
+#define UART_SR_TXEMPTY		0x00000008	/* TX FIFO empty */
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/uncompress.h b/arch/arm/mach-zynq/include/mach/uncompress.h
new file mode 100644
index 00000000000..af4e8447bfa
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/uncompress.h
@@ -0,0 +1,51 @@
+/* arch/arm/mach-zynq/include/mach/uncompress.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_UNCOMPRESS_H__
+#define __MACH_UNCOMPRESS_H__
+
+#include <linux/io.h>
+#include <asm/processor.h>
+#include <mach/zynq_soc.h>
+#include <mach/uart.h>
+
+void arch_decomp_setup(void)
+{
+}
+
+static inline void flush(void)
+{
+	/*
+	 * Wait while the FIFO is not empty
+	 */
+	while (!(__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) &
+		UART_SR_TXEMPTY))
+		cpu_relax();
+}
+
+#define arch_decomp_wdog()
+
+static void putc(char ch)
+{
+	/*
+	 * Wait for room in the FIFO, then write the char into the FIFO
+	 */
+	while (__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) &
+		UART_SR_TXFULL)
+		cpu_relax();
+
+	__raw_writel(ch, IOMEM(LL_UART_PADDR + UART_FIFO_OFFSET));
+}
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/vmalloc.h b/arch/arm/mach-zynq/include/mach/vmalloc.h
new file mode 100644
index 00000000000..2398eff1e8b
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/vmalloc.h
@@ -0,0 +1,20 @@
+/* arch/arm/mach-zynq/include/mach/vmalloc.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_VMALLOC_H__
+#define __MACH_VMALLOC_H__
+
+#define VMALLOC_END       0xE0000000UL
+
+#endif
diff --git a/arch/arm/mach-zynq/include/mach/zynq_soc.h b/arch/arm/mach-zynq/include/mach/zynq_soc.h
new file mode 100644
index 00000000000..d0d3f8fb06d
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/zynq_soc.h
@@ -0,0 +1,48 @@
+/* arch/arm/mach-zynq/include/mach/zynq_soc.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_XILINX_SOC_H__
+#define __MACH_XILINX_SOC_H__
+
+#define PERIPHERAL_CLOCK_RATE		2500000
+
+/* For now, all mappings are flat (physical = virtual)
+ */
+#define UART0_PHYS			0xE0000000
+#define UART0_VIRT			UART0_PHYS
+
+#define TTC0_PHYS			0xF8001000
+#define TTC0_VIRT			TTC0_PHYS
+
+#define PL310_L2CC_PHYS			0xF8F02000
+#define PL310_L2CC_VIRT			PL310_L2CC_PHYS
+
+#define SCU_PERIPH_PHYS			0xF8F00000
+#define SCU_PERIPH_VIRT			SCU_PERIPH_PHYS
+
+/* The following are intended for the devices that are mapped early */
+
+#define TTC0_BASE			IOMEM(TTC0_VIRT)
+#define SCU_PERIPH_BASE			IOMEM(SCU_PERIPH_VIRT)
+#define SCU_GIC_CPU_BASE		(SCU_PERIPH_BASE + 0x100)
+#define SCU_GIC_DIST_BASE		(SCU_PERIPH_BASE + 0x1000)
+#define PL310_L2CC_BASE			IOMEM(PL310_L2CC_VIRT)
+
+/*
+ * Mandatory for CONFIG_LL_DEBUG, UART is mapped virtual = physical
+ */
+#define LL_UART_PADDR	UART0_PHYS
+#define LL_UART_VADDR	UART0_VIRT
+
+#endif