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SOC support for Keystone II devices:

Browse source 
- Minimal machine and device-tree support with arch_timers and console UART
 - Reboot hook using PLL reset
 - Low level debug support using UART
 - SMP boot support
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Merge tag 'keystone-soc-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/soc

From Santosh Shilimkar:
SOC support for Keystone II devices:
- Minimal machine and device-tree support with arch_timers and console UART
- Reboot hook using PLL reset
- Low level debug support using UART
- SMP boot support

* tag 'keystone-soc-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  ARM: keystone: Enable SMP support on Keystone machines
  ARM: keystone: Add minimal TI Keystone platform support
  ARM: dts: keystone: Add minimal Keystone SOC device tree data

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2013-06-18 00:23:04 -07:00
commit 99ff183042
13 changed files with 509 additions and 0 deletions
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10
Documentation/devicetree/bindings/arm/keystone/keystone.txt Normal file
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@ -0,0 +1,10 @@
TI Keystone Platforms Device Tree Bindings
-----------------------------------------------
Boards with Keystone2 based devices (TCI66xxK2H) SOC shall have the
following properties.
Required properties:
- compatible: All TI specific devices present in Keystone SOC should be in
the form "ti,keystone-*". Generic devices like gic, arch_timers, ns16550
type UART should use the specified compatible for those devices.

3
arch/arm/Kconfig
View file

@ -950,6 +950,8 @@ source "arch/arm/mach-iop13xx/Kconfig"
source "arch/arm/mach-ixp4xx/Kconfig"
source "arch/arm/mach-keystone/Kconfig"
source "arch/arm/mach-kirkwood/Kconfig"
source "arch/arm/mach-ks8695/Kconfig"
@ -1562,6 +1564,7 @@ config ARCH_NR_GPIO
int
default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
default 512 if SOC_OMAP5
default 512 if ARCH_KEYSTONE
default 392 if ARCH_U8500
default 352 if ARCH_VT8500
default 288 if ARCH_SUNXI

16
arch/arm/Kconfig.debug
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@ -251,6 +251,20 @@ choice
Say Y here if you want kernel low-level debugging support
on i.MX6Q/DL.
config DEBUG_KEYSTONE_UART0
bool "Kernel low-level debugging on KEYSTONE2 using UART0"
depends on ARCH_KEYSTONE
help
Say Y here if you want the debug print routines to direct
their output to UART0 serial port on KEYSTONE2 devices.
config DEBUG_KEYSTONE_UART1
bool "Kernel low-level debugging on KEYSTONE2 using UART1"
depends on ARCH_KEYSTONE
help
Say Y here if you want the debug print routines to direct
their output to UART1 serial port on KEYSTONE2 devices.
config DEBUG_MMP_UART2
bool "Kernel low-level debugging message via MMP UART2"
depends on ARCH_MMP
@ -657,6 +671,8 @@ config DEBUG_LL_INCLUDE
DEBUG_IMX51_UART || \
DEBUG_IMX53_UART ||\
DEBUG_IMX6Q_UART
default "debug/keystone.S" if DEBUG_KEYSTONE_UART0 || \
DEBUG_KEYSTONE_UART1
default "debug/mvebu.S" if DEBUG_MVEBU_UART || \
DEBUG_MVEBU_UART_ALTERNATE
default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART

1
arch/arm/Makefile
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@ -195,6 +195,7 @@ machine-$(CONFIG_PLAT_SPEAR) += spear
machine-$(CONFIG_ARCH_VIRT) += virt
machine-$(CONFIG_ARCH_ZYNQ) += zynq
machine-$(CONFIG_ARCH_SUNXI) += sunxi
machine-$(CONFIG_ARCH_KEYSTONE) += keystone
# Platform directory name. This list is sorted alphanumerically
# by CONFIG_* macro name.

117
arch/arm/boot/dts/keystone.dts Normal file
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@ -0,0 +1,117 @@
/*
* Copyright 2013 Texas Instruments, Inc.
*
* 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.
*/
/dts-v1/;
/include/ "skeleton.dtsi"
/ {
model = "Texas Instruments Keystone 2 SoC";
compatible = "ti,keystone-evm";
#address-cells = <2>;
#size-cells = <2>;
interrupt-parent = <&gic>;
aliases {
serial0 = &uart0;
};
memory {
reg = <0x00000000 0x80000000 0x00000000 0x40000000>;
};
cpus {
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <&gic>;
cpu@0 {
compatible = "arm,cortex-a15";
device_type = "cpu";
reg = <0>;
};
cpu@1 {
compatible = "arm,cortex-a15";
device_type = "cpu";
reg = <1>;
};
cpu@2 {
compatible = "arm,cortex-a15";
device_type = "cpu";
reg = <2>;
};
cpu@3 {
compatible = "arm,cortex-a15";
device_type = "cpu";
reg = <3>;
};
};
gic: interrupt-controller {
compatible = "arm,cortex-a15-gic";
#interrupt-cells = <3>;
#size-cells = <0>;
#address-cells = <1>;
interrupt-controller;
reg = <0x0 0x02561000 0x0 0x1000>,
<0x0 0x02562000 0x0 0x2000>;
};
timer {
compatible = "arm,armv7-timer";
interrupts = <1 13 0xf08>,
<1 14 0xf08>,
<1 11 0xf08>,
<1 10 0x308>;
};
pmu {
compatible = "arm,cortex-a15-pmu";
interrupts = <0 20 0xf01>,
<0 21 0xf01>,
<0 22 0xf01>,
<0 23 0xf01>;
};
soc {
#address-cells = <1>;
#size-cells = <1>;
compatible = "ti,keystone","simple-bus";
interrupt-parent = <&gic>;
ranges = <0x0 0x0 0x0 0xc0000000>;
rstctrl: reset-controller {
compatible = "ti,keystone-reset";
reg = <0x023100e8 4>; /* pll reset control reg */
};
uart0: serial@02530c00 {
compatible = "ns16550a";
current-speed = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
reg = <0x02530c00 0x100>;
clock-frequency = <133120000>;
interrupts = <0 277 0xf01>;
};
uart1: serial@02531000 {
compatible = "ns16550a";
current-speed = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
reg = <0x02531000 0x100>;
clock-frequency = <133120000>;
interrupts = <0 280 0xf01>;
};
};
};

157
arch/arm/configs/keystone_defconfig Normal file
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@ -0,0 +1,157 @@
# CONFIG_SWAP is not set
CONFIG_POSIX_MQUEUE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_BLK_DEV_INITRD=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_ELF_CORE is not set
# CONFIG_BASE_FULL is not set
CONFIG_EMBEDDED=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_ARCH_KEYSTONE=y
CONFIG_ARM_LPAE=y
CONFIG_SMP=y
CONFIG_PREEMPT=y
CONFIG_AEABI=y
CONFIG_HIGHMEM=y
CONFIG_VFP=y
CONFIG_NEON=y
# CONFIG_SUSPEND is not set
CONFIG_PM_RUNTIME=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
CONFIG_XFRM_USER=y
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_STATISTICS=y
CONFIG_NET_KEY=y
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_NET_IPIP=y
CONFIG_NET_IPGRE_DEMUX=y
CONFIG_NET_IPGRE=y
CONFIG_IP_MROUTE=y
CONFIG_IP_MROUTE_MULTIPLE_TABLES=y
CONFIG_IP_PIMSM_V2=y
CONFIG_INET_AH=y
CONFIG_INET_IPCOMP=y
CONFIG_IPV6=y
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
CONFIG_IPV6_SIT=m
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_IPV6_SUBTREES=y
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_PIMSM_V2=y
CONFIG_NETFILTER=y
CONFIG_NF_CONNTRACK=y
CONFIG_NF_CT_NETLINK=y
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
CONFIG_NETFILTER_XT_TARGET_IDLETIMER=y
CONFIG_NETFILTER_XT_TARGET_MARK=y
CONFIG_NETFILTER_XT_MATCH_COMMENT=y
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=y
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
CONFIG_NETFILTER_XT_MATCH_CPU=y
CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
CONFIG_NETFILTER_XT_MATCH_LENGTH=y
CONFIG_NETFILTER_XT_MATCH_MAC=y
CONFIG_NETFILTER_XT_MATCH_MARK=y
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=y
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
CONFIG_NETFILTER_XT_MATCH_STATE=y
CONFIG_NF_CONNTRACK_IPV4=y
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_MATCH_AH=y
CONFIG_IP_NF_MATCH_ECN=y
CONFIG_IP_NF_MATCH_TTL=y
CONFIG_IP_NF_FILTER=y
CONFIG_IP_NF_TARGET_REJECT=y
CONFIG_IP_NF_TARGET_ULOG=y
CONFIG_IP_NF_MANGLE=y
CONFIG_IP_NF_TARGET_CLUSTERIP=y
CONFIG_IP_NF_TARGET_ECN=y
CONFIG_IP_NF_TARGET_TTL=y
CONFIG_IP_NF_RAW=y
CONFIG_IP_NF_ARPTABLES=y
CONFIG_IP_NF_ARPFILTER=y
CONFIG_IP_NF_ARP_MANGLE=y
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP_SCTP=y
CONFIG_VLAN_8021Q=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_CMA=y
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_PLATRAM=y
CONFIG_MTD_M25P80=y
CONFIG_MTD_NAND=y
CONFIG_MTD_UBI=y
CONFIG_PROC_DEVICETREE=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_EEPROM_AT24=y
CONFIG_NETDEVICES=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
# CONFIG_I2C_COMPAT is not set
CONFIG_I2C_CHARDEV=y
CONFIG_SPI=y
CONFIG_SPI_SPIDEV=y
# CONFIG_HWMON is not set
CONFIG_WATCHDOG=y
# CONFIG_USB_SUPPORT is not set
CONFIG_DMADEVICES=y
CONFIG_COMMON_CLK_DEBUG=y
CONFIG_MEMORY=y
CONFIG_TMPFS=y
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_WBUF_VERIFY=y
CONFIG_UBIFS_FS=y
CONFIG_CRAMFS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3_ACL=y
CONFIG_ROOT_NFS=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_PRINTK_TIME=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_USER=y
CONFIG_CRYPTO_USER=y
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_AUTHENC=y
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CTR=y
CONFIG_CRYPTO_XCBC=y
CONFIG_CRYPTO_DES=y
CONFIG_CRYPTO_ANSI_CPRNG=y
CONFIG_CRYPTO_USER_API_HASH=y
CONFIG_CRYPTO_USER_API_SKCIPHER=y

43
arch/arm/include/debug/keystone.S Normal file
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@ -0,0 +1,43 @@
/*
* Early serial debug output macro for Keystone SOCs
*
* Copyright 2013 Texas Instruments, Inc.
* Santosh Shilimkar <santosh.shilimkar@ti.com>
*
* Based on RMKs low level debug code.
* Copyright (C) 1994-1999 Russell King
*
* 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 <linux/serial_reg.h>
#define UART_SHIFT 2
#if defined(CONFIG_DEBUG_KEYSTONE_UART0)
#define UART_PHYS 0x02530c00
#define UART_VIRT 0xfeb30c00
#elif defined(CONFIG_DEBUG_KEYSTONE_UART1)
#define UART_PHYS 0x02531000
#define UART_VIRT 0xfeb31000
#endif
.macro addruart, rp, rv, tmp
ldr \rv, =UART_VIRT @ physical base address
ldr \rp, =UART_PHYS @ virtual base address
.endm
.macro senduart,rd,rx
str \rd, [\rx, #UART_TX << UART_SHIFT]
.endm
.macro busyuart,rd,rx
1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
bne 1002b
.endm
.macro waituart,rd,rx
.endm

15
arch/arm/mach-keystone/Kconfig Normal file
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@ -0,0 +1,15 @@
config ARCH_KEYSTONE
bool "Texas Instruments Keystone Devices"
depends on ARCH_MULTI_V7
select CPU_V7
select ARM_GIC
select HAVE_ARM_ARCH_TIMER
select HAVE_SMP
select CLKSRC_MMIO
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARM_ERRATA_798181
help
Support for boards based on the Texas Instruments Keystone family of
SoCs.

2
arch/arm/mach-keystone/Makefile Normal file
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@ -0,0 +1,2 @@
obj-y := keystone.o
obj-$(CONFIG_SMP) += platsmp.o

1
arch/arm/mach-keystone/Makefile.boot Normal file
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@ -0,0 +1 @@
zreladdr-y := 0x80008000

75
arch/arm/mach-keystone/keystone.c Normal file
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@ -0,0 +1,75 @@
/*
* Keystone2 based boards and SOC related code.
*
* Copyright 2013 Texas Instruments, Inc.
* Cyril Chemparathy <cyril@ti.com>
* Santosh Shilimkar <santosh.shillimkar@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*/
#include <linux/io.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <asm/setup.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/smp_plat.h>
#include "keystone.h"
#define PLL_RESET_WRITE_KEY_MASK 0xffff0000
#define PLL_RESET_WRITE_KEY 0x5a69
#define PLL_RESET BIT(16)
static void __iomem *keystone_rstctrl;
static void __init keystone_init(void)
{
struct device_node *node;
node = of_find_compatible_node(NULL, NULL, "ti,keystone-reset");
if (WARN_ON(!node))
pr_warn("ti,keystone-reset node undefined\n");
keystone_rstctrl = of_iomap(node, 0);
if (WARN_ON(!keystone_rstctrl))
pr_warn("ti,keystone-reset iomap error\n");
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static const char *keystone_match[] __initconst = {
"ti,keystone-evm",
NULL,
};
void keystone_restart(char mode, const char *cmd)
{
u32 val;
BUG_ON(!keystone_rstctrl);
/* Enable write access to RSTCTRL */
val = readl(keystone_rstctrl);
val &= PLL_RESET_WRITE_KEY_MASK;
val |= PLL_RESET_WRITE_KEY;
writel(val, keystone_rstctrl);
/* Reset the SOC */
val = readl(keystone_rstctrl);
val &= ~PLL_RESET;
writel(val, keystone_rstctrl);
}
DT_MACHINE_START(KEYSTONE, "Keystone")
.smp = smp_ops(keystone_smp_ops),
.init_machine = keystone_init,
.dt_compat = keystone_match,
.restart = keystone_restart,
MACHINE_END

17
arch/arm/mach-keystone/keystone.h Normal file
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@ -0,0 +1,17 @@
/*
* Copyright 2013 Texas Instruments, Inc.
* Cyril Chemparathy <cyril@ti.com>
* Santosh Shilimkar <santosh.shillimkar@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*/
#ifndef __KEYSTONE_H__
#define __KEYSTONE_H__
extern struct smp_operations keystone_smp_ops;
extern void secondary_startup(void);
#endif /* __KEYSTONE_H__ */

52
arch/arm/mach-keystone/platsmp.c Normal file
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@ -0,0 +1,52 @@
/*
* Keystone SOC SMP platform code
*
* Copyright 2013 Texas Instruments, Inc.
* Cyril Chemparathy <cyril@ti.com>
* Santosh Shilimkar <santosh.shillimkar@ti.com>
*
* Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <asm/smp_plat.h>
#include <asm/prom.h>
#include "keystone.h"
static int __cpuinit keystone_smp_boot_secondary(unsigned int cpu,
struct task_struct *idle)
{
unsigned long start = virt_to_phys(&secondary_startup);
int error;
pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
cpu, start);
asm volatile (
"mov r0, #0\n" /* power on cmd */
"mov r1, %1\n" /* cpu */
"mov r2, %2\n" /* start */
".inst 0xe1600070\n" /* smc #0 */
"mov %0, r0\n"
: "=r" (error)
: "r"(cpu), "r"(start)
: "cc", "r0", "r1", "r2", "memory"
);
pr_debug("keystone-smp: monitor returned %d\n", error);
return error;
}
struct smp_operations keystone_smp_ops __initdata = {
.smp_init_cpus = arm_dt_init_cpu_maps,
.smp_boot_secondary = keystone_smp_boot_secondary,
};