[PATCH v10 2/2] arm-soc: Add support for tango4 platforms
Marc Gonzalez
marc_gonzalez at sigmadesigns.com
Tue Nov 24 09:40:03 PST 2015
Support Sigma Designs ARM-based (specifically, Cortex-A9 MPCore r3p0)
Tango4 "Secure Media Processor" platforms: smp8756, smp8758, smp8759
(8756 is single-core, the latter are dual-core).
Note: 8758 vs 8759: same chip, different package.
Support for older MIPS-based platforms can be found elsewhere:
https://github.com/mansr/linux-tangox
Signed-off-by: Marc Gonzalez <marc_gonzalez at sigmadesigns.com>
---
MAINTAINERS | 7 +++++++
arch/arm/Kconfig | 2 ++
arch/arm/Makefile | 1 +
arch/arm/mach-tango/Kconfig | 12 ++++++++++++
arch/arm/mach-tango/Makefile | 2 ++
arch/arm/mach-tango/setup.c | 31 +++++++++++++++++++++++++++++++
arch/arm/mach-tango/smc.S | 9 +++++++++
arch/arm/mach-tango/smc.h | 5 +++++
8 files changed, 69 insertions(+)
create mode 100644 arch/arm/mach-tango/Kconfig
create mode 100644 arch/arm/mach-tango/Makefile
create mode 100644 arch/arm/mach-tango/setup.c
create mode 100644 arch/arm/mach-tango/smc.S
create mode 100644 arch/arm/mach-tango/smc.h
diff --git a/MAINTAINERS b/MAINTAINERS
index b60e2b2369d2..67575fffc188 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1529,6 +1529,13 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/mcoquelin/stm32.git
N: stm32
F: drivers/clocksource/armv7m_systick.c
+ARM/TANGO ARCHITECTURE
+M: Marc Gonzalez <marc_gonzalez at sigmadesigns.com>
+L: linux-arm-kernel at lists.infradead.org
+S: Maintained
+F: arch/arm/mach-tango/
+F: arch/arm/boot/dts/tango*
+
ARM/TECHNOLOGIC SYSTEMS TS7250 MACHINE SUPPORT
M: Lennert Buytenhek <kernel at wantstofly.org>
L: linux-arm-kernel at lists.infradead.org (moderated for non-subscribers)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 774dc59650c5..3fbe165d3c37 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -934,6 +934,8 @@ source "arch/arm/mach-sunxi/Kconfig"
source "arch/arm/mach-prima2/Kconfig"
+source "arch/arm/mach-tango/Kconfig"
+
source "arch/arm/mach-tegra/Kconfig"
source "arch/arm/mach-u300/Kconfig"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 7451b447cc2d..e49840682d3d 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -203,6 +203,7 @@ machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
machine-$(CONFIG_ARCH_STI) += sti
machine-$(CONFIG_ARCH_STM32) += stm32
machine-$(CONFIG_ARCH_SUNXI) += sunxi
+machine-$(CONFIG_ARCH_TANGO) += tango
machine-$(CONFIG_ARCH_TEGRA) += tegra
machine-$(CONFIG_ARCH_U300) += u300
machine-$(CONFIG_ARCH_U8500) += ux500
diff --git a/arch/arm/mach-tango/Kconfig b/arch/arm/mach-tango/Kconfig
new file mode 100644
index 000000000000..cfcc87995426
--- /dev/null
+++ b/arch/arm/mach-tango/Kconfig
@@ -0,0 +1,12 @@
+config ARCH_TANGO
+ bool "Sigma Designs Tango4 (SMP87xx)" if ARCH_MULTI_V7
+ # Cortex-A9 MPCore r3p0, PL310 r3p2
+ select ARCH_HAS_HOLES_MEMORYMODEL
+ select ARM_ERRATA_754322
+ select ARM_ERRATA_764369 if SMP
+ select ARM_ERRATA_775420
+ select ARM_GIC
+ select CLKSRC_TANGO_XTAL
+ select GENERIC_IRQ_CHIP
+ select HAVE_ARM_SCU
+ select HAVE_ARM_TWD
diff --git a/arch/arm/mach-tango/Makefile b/arch/arm/mach-tango/Makefile
new file mode 100644
index 000000000000..0d7e2b5976e3
--- /dev/null
+++ b/arch/arm/mach-tango/Makefile
@@ -0,0 +1,2 @@
+asflags-y += -mcpu=cortex-a9
+obj-y += setup.o smc.o
diff --git a/arch/arm/mach-tango/setup.c b/arch/arm/mach-tango/setup.c
new file mode 100644
index 000000000000..d86900550e63
--- /dev/null
+++ b/arch/arm/mach-tango/setup.c
@@ -0,0 +1,31 @@
+#include <linux/smp.h>
+#include <asm/mach/arch.h>
+#include <asm/hardware/cache-l2x0.h>
+#include "smc.h"
+
+static int tango4_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ tango_set_aux_boot_addr(virt_to_phys(secondary_startup));
+ tango_start_aux_core(cpu);
+ return 0;
+}
+
+static struct smp_operations tango4_smp_ops __initdata = {
+ .smp_boot_secondary = tango4_boot_secondary,
+};
+
+CPU_METHOD_OF_DECLARE(tango4_smp, "sigma,tango4-smp", &tango4_smp_ops);
+
+static void tango_l2c_write(unsigned long val, unsigned int reg)
+{
+ if (reg == L2X0_CTRL)
+ tango_set_l2_control(val);
+}
+
+static const char *const tango_dt_compat[] = { "sigma,tango4", NULL };
+
+DT_MACHINE_START(TANGO_DT, "Sigma Tango DT")
+ .dt_compat = tango_dt_compat,
+ .l2c_aux_mask = ~0,
+ .l2c_write_sec = tango_l2c_write,
+MACHINE_END
diff --git a/arch/arm/mach-tango/smc.S b/arch/arm/mach-tango/smc.S
new file mode 100644
index 000000000000..5d932ce3c1bd
--- /dev/null
+++ b/arch/arm/mach-tango/smc.S
@@ -0,0 +1,9 @@
+#include <linux/linkage.h>
+
+ENTRY(tango_smc)
+ push {lr}
+ mov ip, r1
+ dsb /* This barrier is probably unnecessary */
+ smc #0
+ pop {pc}
+ENDPROC(tango_smc)
diff --git a/arch/arm/mach-tango/smc.h b/arch/arm/mach-tango/smc.h
new file mode 100644
index 000000000000..7a4af35cc390
--- /dev/null
+++ b/arch/arm/mach-tango/smc.h
@@ -0,0 +1,5 @@
+extern int tango_smc(unsigned int val, unsigned int service);
+
+#define tango_set_l2_control(val) tango_smc(val, 0x102)
+#define tango_start_aux_core(val) tango_smc(val, 0x104)
+#define tango_set_aux_boot_addr(val) tango_smc((unsigned int)val, 0x105)
--
2.4.5
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