[linux-yocto] [PATCH 04/28] arm: rapidio updates
Charlie Paul
cpaul.windriver at gmail.com
Fri May 2 09:22:08 PDT 2014
From: Paul Butler <paul.butler at windriver.com>
- Added the RapidIO management options
- Added the rio device to the axm55xx
- Created the rio architecture support for arm
- Added a file to support the RAPIDIO Bus registration
Signed-off-by: Paul Butler <paul.butler at windriver.com>
---
arch/arm/Kconfig | 18 +++++++++
arch/arm/boot/dts/axm55xx.dts | 16 ++++++++
arch/arm/include/asm/axxia-rio.h | 82 ++++++++++++++++++++++++++++++++++++++
arch/arm/include/asm/rio.h | 33 +++++++++++++++
arch/arm/mach-axxia/Makefile | 1 +
arch/arm/mach-axxia/clock.c | 5 +++
arch/arm/mach-axxia/rapidio.c | 44 ++++++++++++++++++++
7 files changed, 199 insertions(+)
create mode 100644 arch/arm/include/asm/axxia-rio.h
create mode 100644 arch/arm/include/asm/rio.h
create mode 100644 arch/arm/mach-axxia/rapidio.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 0b98e83..370eca8 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -344,6 +344,7 @@ config ARCH_AXXIA
select PCI
select PCI_DOMAINS if PCI
select ARCH_SUPPORTS_MSI if PCI
+ select HAS_RAPIDIO if (!PREEMPT_RTB)
help
This enables support for the LSI Axxia boards.
@@ -2358,3 +2359,20 @@ source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
+
+menu "RapidIO management options"
+
+config HAS_RAPIDIO
+ bool
+ default n
+
+config RAPIDIO
+ bool "RapidIO support"
+ depends on HAS_RAPIDIO || PCI
+ help
+ If you say Y here, the kernel will include drivers and
+ infrastructure code to support RapidIO interconnect devices.
+
+source "drivers/rapidio/Kconfig"
+
+endmenu
diff --git a/arch/arm/boot/dts/axm55xx.dts b/arch/arm/boot/dts/axm55xx.dts
index aac791d..7ecb177 100644
--- a/arch/arm/boot/dts/axm55xx.dts
+++ b/arch/arm/boot/dts/axm55xx.dts
@@ -35,6 +35,7 @@
serial0 = &axxia_serial0;
timer = &axxia_timers;
ethernet0 = &axxia_femac0;
+ rapidio0 = &rio0;
};
cpus {
@@ -423,6 +424,21 @@
reg = <0x20 0x10098000 0 0x3000>;
interrupts = <0 45 4>;
};
+
+ rio0: rapidio {
+ index = <0>;
+ status = "disabled";
+ #address-cells = <2>;
+ #size-cells = <2>;
+ compatible = "axxia,rapidio-delta";
+ device_type = "rapidio";
+ reg = <0x0020 0x20142000 0x0 0x1000>; /* SRIO Conf 0 region */
+ ranges = <0x0 0x0 0x0031 0x00000000 0x0 0x40000000>;
+ linkdown-reset = <0x0200 0x100 0x0020 0x10000000 0x0 0x000010000>;
+ interrupts = <0 89 4>;
+ outb-dmes = <2 0x00000003 1 0x00000000>;
+ };
+
};
/*
diff --git a/arch/arm/include/asm/axxia-rio.h b/arch/arm/include/asm/axxia-rio.h
new file mode 100644
index 0000000..f244c85
--- /dev/null
+++ b/arch/arm/include/asm/axxia-rio.h
@@ -0,0 +1,82 @@
+/*
+ * RapidIO support for LSI Axxia parts
+ *
+ */
+#ifndef __ASM_AXXIA_RIO_H__
+#define __ASM_AXXIA_RIO_H__
+
+/* Constants, Macros, etc. */
+
+#define AXXIA_RIO_SMALL_SYSTEM
+
+#define AXXIA_RIO_SYSMEM_BARRIER()
+
+#define AXXIA_RIO_DISABLE_MACHINE_CHECK()
+#define AXXIA_RIO_ENABLE_MACHINE_CHECK()
+#define AXXIA_RIO_IF_MACHINE_CHECK(mcsr) (mcsr = 0)
+
+#define IN_SRIO8(a, v, ec) {v = inb((long unsigned int)a); ec = 0;}
+#define IN_SRIO16(a, v, ec) {v = inw((long unsigned int)a); ec = 0;}
+#define IN_SRIO32(a, v, ec) {v = inl((long unsigned int)a); ec = 0;}
+
+#define OUT_SRIO8(a, v) outb_p(v, (long unsigned int) a)
+#define OUT_SRIO16(a, v) outw_p(v, (long unsigned int) a)
+#define OUT_SRIO32(a, v) outl_p(v, (long unsigned int) a)
+
+#define _SWAP32(x) ((((x) & 0x000000FF) << 24) | (((x) & 0x0000FF00) << 8) | (((x) & 0x00FF0000) >> 8) | (((x) & 0xFF000000) >> 24))
+#define CORRECT_GRIO(a) _SWAP32(a)
+#define CORRECT_RAB(a) (a)
+
+/* ACP RIO board-specific stuff */
+
+extern int axxia_rio_apio_enable(struct rio_mport *mport, u32 mask, u32 bits);
+extern int axxia_rio_apio_disable(struct rio_mport *mport);
+extern int axxia_rio_rpio_enable(struct rio_mport *mport, u32 mask, u32 bits);
+extern int axxia_rio_rpio_disable(struct rio_mport *mport);
+
+extern int axxia_rapidio_board_init(void);
+
+
+/*****************************/
+/* ACP RIO operational stuff */
+/*****************************/
+
+/**
+ * CNTLZW - Count leading zeros word
+ * @val: value from which count number of leading zeros
+ *
+ * Return: number of zeros
+ */
+static inline u32 CNTLZW(u32 val)
+{
+ int n = 0;
+ if (val == 0)
+ return 32;
+ if ((val & 0xFFFF0000) == 0)
+ n += 16; val = val << 16;
+ /* 1111 1111 1111 1111 0000 0000 0000 0000
+ // 16 bits from left are zero! so we omit 16 left bits */
+ if ((val & 0xFF000000) == 0)
+ n = n + 8; val = val << 8;
+ /* 8 left bits are 0 */
+ if ((val & 0xF0000000) == 0)
+ n = n + 4; val = val << 4;
+ /* 4 left bits are 0 */
+ if ((val & 0xC0000000) == 0)
+ n = n + 2, val = val << 2;
+ /* 110000....0 2 left bits are zero */
+ if ((val & 0x80000000) == 0)
+ n = n + 1, val = val << 1;
+ /* first left bit is zero */
+ return n;
+}
+
+static inline unsigned long get_tb(void)
+{
+ unsigned int value;
+ /* Read CCNT Register (cyclecount) */
+ asm volatile ("MRC p15, 0, %0, c9, c13, 0\t\n" : "=r"(value));
+ return value;
+}
+
+#endif /* __ASM_AXXIA_RIO_H__ */
diff --git a/arch/arm/include/asm/rio.h b/arch/arm/include/asm/rio.h
new file mode 100644
index 0000000..10da207
--- /dev/null
+++ b/arch/arm/include/asm/rio.h
@@ -0,0 +1,33 @@
+/*
+ * RapidIO architecture support
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter at kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef ASM_ARM_RIO_H
+#define ASM_ARM_RIO_H
+
+#include <asm/io.h>
+
+extern void platform_rio_init(void);
+
+#if defined(CONFIG_AXXIA_RIO)
+
+#define rio_in_8(src, dst) ({ insb((long unsigned int)src, dst, 8); 0; })
+#define rio_in_be16(src, dst) ({ insw((long unsigned int)src, dst, 16); 0; })
+#define rio_in_be32(src, dst) ({ insl((long unsigned int)src, dst, 32); 0; })
+
+#define out_8(dst, val) outb_p(val, (long unsigned int)(dst))
+#define out_be16(dst, val) outw_p(val, (long unsigned int)(dst))
+
+#endif
+
+#define iosync()
+
+#endif
diff --git a/arch/arm/mach-axxia/Makefile b/arch/arm/mach-axxia/Makefile
index 0459a1f..2e9ddf7 100644
--- a/arch/arm/mach-axxia/Makefile
+++ b/arch/arm/mach-axxia/Makefile
@@ -9,6 +9,7 @@ obj-y += timers.o
obj-y += pci.o
obj-y += ddr_retention.o
obj-$(CONFIG_I2C) += i2c.o
+obj-$(CONFIG_AXXIA_RIO) += rapidio.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_ARCH_AXXIA_GIC) += axxia-gic.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
diff --git a/arch/arm/mach-axxia/clock.c b/arch/arm/mach-axxia/clock.c
index 49ca80b..4232277 100644
--- a/arch/arm/mach-axxia/clock.c
+++ b/arch/arm/mach-axxia/clock.c
@@ -64,6 +64,11 @@ axxia_init_clocks(void)
clk_register_clkdev(clk, NULL, "2010082000.uart");
/* PL011 UART3 */
clk_register_clkdev(clk, NULL, "2010083000.uart");
+ /* I2C */
+ clk_register_clkdev(clk, NULL, "2010084000.i2c");
+ clk_register_clkdev(clk, NULL, "2010085000.i2c");
+ clk_register_clkdev(clk, NULL, "2010086000.i2c");
+ clk_register_clkdev(clk, NULL, "2010087000.i2c");
/* PL022 SSP */
clk_register_clkdev(clk, NULL, "ssp");
diff --git a/arch/arm/mach-axxia/rapidio.c b/arch/arm/mach-axxia/rapidio.c
new file mode 100644
index 0000000..a9da46b
--- /dev/null
+++ b/arch/arm/mach-axxia/rapidio.c
@@ -0,0 +1,44 @@
+/*
+ * linux/arch/arm/mach-axxia/rapidio.c
+ *
+ * Helper module for board specific RAPIDIO bus registration
+ *
+ * Copyright (C) 2013 LSI Corporation.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+
+
+/**
+ * axxia_rapidio_board_init -
+ * Perform board-specific initialization to support use of RapidIO busses
+ *
+ * Returns 0 on success or an error code.
+ */
+int
+axxia_rapidio_board_init(void)
+{
+ return 0;
+}
--
1.7.9.5
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