diff mbox

[v10,2/2] arm-soc: Add support for tango4 platforms

Message ID 5654A0F3.40404@sigmadesigns.com (mailing list archive)
State New, archived
Headers show

Commit Message

Marc Gonzalez Nov. 24, 2015, 5:40 p.m. UTC 
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@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

Comments

Marc Gonzalez Nov. 25, 2015, 10:32 a.m. UTC | #1 
On 24/11/2015 18:40, Marc Gonzalez wrote:

> +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

Instead of GENERIC_IRQ_CHIP, I should select TANGO_IRQCHIP
(to be defined in drivers/irqchip/Kconfig)

TANGO_IRQCHIP itself will select IRQ_DOMAIN and GENERIC_IRQ_CHIP.
Arnd Bergmann Dec. 11, 2015, 11:14 p.m. UTC | #2 
On Wednesday 25 November 2015 11:32:33 Marc Gonzalez wrote:
> On 24/11/2015 18:40, Marc Gonzalez wrote:
> 
> > +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
> 
> Instead of GENERIC_IRQ_CHIP, I should select TANGO_IRQCHIP
> (to be defined in drivers/irqchip/Kconfig)
> 
> TANGO_IRQCHIP itself will select IRQ_DOMAIN and GENERIC_IRQ_CHIP.
> 

Are you sending a V11 with this?

	Arnd
Marc Gonzalez Dec. 14, 2015, 8:13 a.m. UTC | #3 
On 12/12/2015 00:14, Arnd Bergmann wrote:
> On Wednesday 25 November 2015 11:32:33 Marc Gonzalez wrote:
>> On 24/11/2015 18:40, Marc Gonzalez wrote:
>>
>>> +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
>>
>> Instead of GENERIC_IRQ_CHIP, I should select TANGO_IRQCHIP
>> (to be defined in drivers/irqchip/Kconfig)
>>
>> TANGO_IRQCHIP itself will select IRQ_DOMAIN and GENERIC_IRQ_CHIP.
>>
> 
> Are you sending a V11 with this?

Yep, v11 coming up later today.

Thanks for reminding me.

Regards.
diff mbox

Patch

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@sigmadesigns.com>
+L:	linux-arm-kernel@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@wantstofly.org>
 L:	linux-arm-kernel@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)