[PATCH 1/2] XCEP PXA255 Processor Board

[Michael Abbott]

This is an updated patch in response to Eric Miao's comments.

On Mon, 11 May 2009, Eric Miao wrote:
> Please, separate the _defconfig into another patch. This makes
> code review difficult. (And relevant content removed from this mail)

Separate patch follows.

> I'd suggest gpio_to_irq(XCEP_ETH_GPIO) - thus defining XCEP_ETH_GPIO
> instead of XCEP_ETH_IRQ, which is confusing.
I've defined XCEP_ETH_IRQ as IRQ_GPIO0 which seems direct and clear 
enough, I hope.

> You may want a PXA_CSx_... macro here for this magic number.
Done, here and elsewhere.

> I'm seeing the CPLD connected to one of the chip-select, which you may 
> also add it here?
Hmm.  Seems reasonable enough but then it looks as if the CPLD's entry in 
the IO map is bogus anyway, so I've removed that (but left the CS 
definition, which seems wise).

> I'm not sure if the MFP needs to be initialized this early, moving this
> to xcep_init() would be better, at least to align with other platforms
> from my POV.
Done.

> > +MACHINE_START(XCEP, "Iskratel XCEP")
> > +    .phys_io    Â= 0x80000000,
> > +    .io_pg_offst  Â= 0xf8000000,
> ...... you sure this is correct? Please have a reference to other platforms.
Now this is very odd.  I've updated these two fields to conform to other 
PXA architectures ... but it looks as if these fields don't actually make 
any difference.  I dug a little, and the only place I could find them 
being used is in arch/arm/kernel/head.S (as MACHINFO_PGOFFIO and _PHYSIO), 
and only there if CONFIG_DEBUG_LL is defined.

> OK, this should be now encoded into the smc91x_platfdata, see
> zylonite.c or other boards for example.
Done.



Date: Wed, 18 Mar 2009 13:42:08 +0000
Subject: [PATCH 1/2] XCEP PXA255 Processor Board

Adds support for the XCEP processor from IskraTel.  This is a small
single board computer with an ARM XScale PXA255 processor, 32M flash,
64M RAM and an SMSC LAN91C111 network device.

This board is used in a series of electron beam position monitors used
in synchrotron light sources world wide.

Signed-off-by: Michael Abbott <michael.abbott@xxxxxxxxxxxxx>
---
 arch/arm/mach-pxa/Kconfig  |    6 ++
 arch/arm/mach-pxa/Makefile |    1 +
 arch/arm/mach-pxa/xcep.c   |  195 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 202 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-pxa/xcep.c

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 17d3fbd..47e1dd5 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -460,6 +460,12 @@ config MACH_EZX_E2
 	default y
 	depends on PXA_EZX
 
+config MACH_XCEP
+	bool "Iskratel Electronics XCEP"
+	select PXA25x
+	select MTD_PHYSMAP
+	select PXA_SSP
+
 endmenu
 
 config PXA25x
diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 682dbf4..ef553a3 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_PXA_EZX)           += ezx.o
 obj-$(CONFIG_MACH_INTELMOTE2)   += imote2.o
 obj-$(CONFIG_MACH_CSB726)	+= csb726.o
 obj-$(CONFIG_CSB726_CSB701)	+= csb701.o
+obj-$(CONFIG_MACH_XCEP)         += xcep.o
 
 # Support for blinky lights
 led-y := leds.o
diff --git a/arch/arm/mach-pxa/xcep.c b/arch/arm/mach-pxa/xcep.c
new file mode 100644
index 0000000..17920ed
--- /dev/null
+++ b/arch/arm/mach-pxa/xcep.c
@@ -0,0 +1,195 @@
+/*  linux/arch/arm/mach-pxa/xcep.c
+ *
+ *  Support for the Iskratel Electronics XCEP platform.
+ *
+ *  Author:     Ales Bardorfer <ales@xxxxxxxxx>
+ *  Updates by: Matej Kenda <matej.kenda@xxxxxxxxxxxxxxxxxx>
+ *  Created:    June 2006
+ *  Copyright:  (C) 2006 Instrumentation Technologies
+ *
+ *  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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/sysdev.h>
+#include <linux/major.h>
+#include <linux/fb.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+#include <linux/i2c.h>
+#include <linux/smc91x.h>
+
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include <asm/irq.h>
+#include <asm/sizes.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/flash.h>
+
+#include <mach/pxa2xx-regs.h>
+#include <mach/mfp-pxa25x.h>
+#include <mach/udc.h>
+#include <mach/irda.h>
+#include <mach/pxafb.h>
+#include <mach/mmc.h>
+#include <mach/i2c.h>
+
+#include "generic.h"
+
+
+#define XCEP_ETH_PHYS		(PXA_CS3_PHYS + 0x00000300)
+#define XCEP_ETH_PHYS_END	(PXA_CS3_PHYS + 0x000fffff)
+#define XCEP_ETH_ATTR		(PXA_CS3_PHYS + 0x02000000)
+#define XCEP_ETH_ATTR_END	(PXA_CS3_PHYS + 0x020fffff)
+#define XCEP_ETH_IRQ		IRQ_GPIO0
+
+/*  XCEP CPLD base */
+#define XCEP_CPLD_BASE		0xf0000000
+
+
+/* Flash partitions. */
+
+static struct mtd_partition xcep_partitions[] = {
+	{
+		.name =		"Bootloader",
+		.size =		0x00040000,
+		.offset =	0,
+		.mask_flags =	MTD_WRITEABLE  /* force read-only */
+	}, {
+		.name =		"Bootloader ENV",
+		.size =		0x00040000,
+		.offset =	0x00040000,
+		.mask_flags =	MTD_WRITEABLE  /* force read-only */
+	}, {
+		.name =		"Kernel",
+		.size =		0x00100000,
+		.offset =	0x00080000,
+	}, {
+		.name =		"Rescue fs",
+		.size =		0x00280000,
+		.offset =	0x00180000,
+	}, {
+		.name =		"Filesystem",
+		.size =		MTDPART_SIZ_FULL,
+		.offset =	0x00400000
+	}
+};
+
+static struct physmap_flash_data xcep_flash_data[] = {
+	{
+		.width		= 4,		/* bankwidth in bytes */
+		.parts		= xcep_partitions,
+		.nr_parts	= ARRAY_SIZE(xcep_partitions)
+	}
+};
+
+static struct resource flash_resource = {
+	.start	= PXA_CS0_PHYS,
+	.end	= PXA_CS0_PHYS + SZ_32M - 1,
+	.flags	= IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device = {
+	.name	= "physmap-flash",
+	.id	= 0,
+	.dev 	= {
+		.platform_data = xcep_flash_data,
+	},
+	.resource = &flash_resource,
+	.num_resources = 1,
+};
+
+
+
+/* SMC LAN91C111 network controller. */
+
+static struct resource smc91x_resources[] = {
+	[0] = {
+		.name	= "smc91x-regs",
+		.start	= XCEP_ETH_PHYS,
+		.end	= XCEP_ETH_PHYS_END,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= XCEP_ETH_IRQ,
+		.end	= XCEP_ETH_IRQ,
+		.flags	= IORESOURCE_IRQ,
+	},
+	[2] = {
+		.name	= "smc91x-attrib",
+		.start	= XCEP_ETH_ATTR,
+		.end	= XCEP_ETH_ATTR_END,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct smc91x_platdata xcep_smc91x_info = {
+	.flags	= SMC91X_USE_32BIT | SMC91X_NOWAIT | SMC91X_USE_DMA,
+};
+
+static struct platform_device smc91x_device = {
+	.name		= "smc91x",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(smc91x_resources),
+	.resource	= smc91x_resources,
+	.dev		= {
+		.platform_data = &xcep_smc91x_info,
+	},
+};
+
+
+static struct platform_device *devices[] __initdata = {
+	&flash_device,
+	&smc91x_device,
+};
+
+
+/* We have to state that there are HWMON devices on the I2C bus on XCEP.
+ * Drivers for HWMON verify capabilities of the adapter when loading and
+ * refuse to attach if the adapter doesn't support HWMON class of devices.
+ * See also Documentation/i2c/porting-clients. */
+static struct i2c_pxa_platform_data xcep_i2c_platform_data  = {
+	.class = I2C_CLASS_HWMON
+};
+
+
+static mfp_cfg_t xcep_pin_config[] __initdata = {
+    GPIO79_nCS_3,	/* SMC 91C111 chip select. */
+    GPIO80_nCS_4,	/* CPLD chip select. */
+};
+
+
+static void __init xcep_init(void)
+{
+	pxa2xx_mfp_config(ARRAY_AND_SIZE(xcep_pin_config));
+	/* See Intel XScale Developer's Guide for details */
+	/* Set RDF and RDN to appropriate values (chip select 3 (smc91x)) */
+	MSC1 = (MSC1 & 0xffff) | 0xD5540000;
+	/* Set RDF and RDN to appropriate values (chip select 5 (fpga)) */
+	MSC2 = (MSC2 & 0xffff) | 0x72A00000;
+
+	platform_add_devices(ARRAY_AND_SIZE(devices));
+	pxa_set_i2c_info(&xcep_i2c_platform_data);
+}
+
+MACHINE_START(XCEP, "Iskratel XCEP")
+	.phys_io	= 0x40000000,
+	.io_pg_offst	= (io_p2v(0x40000000) >> 18) & 0xfffc,
+	.boot_params	= 0xa0000100,
+	.init_machine	= xcep_init,
+	.map_io		= pxa_map_io,
+	.init_irq	= pxa25x_init_irq,
+	.timer		= &pxa_timer,
+MACHINE_END
-- 
1.6.1.3