powerpc/5200: Add support for the Media5200 board from Freescale
authorGrant Likely <grant.likely@secretlab.ca>
Wed, 4 Feb 2009 20:39:17 +0000 (13:39 -0700)
committerGrant Likely <grant.likely@secretlab.ca>
Wed, 4 Feb 2009 20:39:17 +0000 (13:39 -0700)
This patch adds board support for the Media5200 platform.  Changes are:
- add the media5200 device tree
- add the media5200 platform support code and cascaded interrupt controller
- add media5200 to the build targets.

Note: this patch also includes a minor tweak to the lite5200(b) target
images list to add the .dtb files to the image list.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
arch/powerpc/boot/Makefile
arch/powerpc/boot/dts/media5200.dts [new file with mode: 0644]
arch/powerpc/platforms/52xx/Kconfig
arch/powerpc/platforms/52xx/Makefile
arch/powerpc/platforms/52xx/media5200.c [new file with mode: 0644]

index e84df338ea298762cb3f75c8393aef3dc14a3167..8244813bc5a6b67198e3cfb6f7f3991bdee8becf 100644 (file)
@@ -235,7 +235,9 @@ image-$(CONFIG_PPC_ADDER875)                += cuImage.adder875-uboot \
                                           dtbImage.adder875-redboot
 
 # Board ports in arch/powerpc/platform/52xx/Kconfig
-image-$(CONFIG_PPC_LITE5200)           += cuImage.lite5200 cuImage.lite5200b
+image-$(CONFIG_PPC_LITE5200)           += cuImage.lite5200 lite5200.dtb
+image-$(CONFIG_PPC_LITE5200)           += cuImage.lite5200b lite5200b.dtb
+image-$(CONFIG_PPC_MEDIA5200)          += cuImage.media5200 media5200.dtb
 
 # Board ports in arch/powerpc/platform/82xx/Kconfig
 image-$(CONFIG_MPC8272_ADS)            += cuImage.mpc8272ads
diff --git a/arch/powerpc/boot/dts/media5200.dts b/arch/powerpc/boot/dts/media5200.dts
new file mode 100644 (file)
index 0000000..e297d8b
--- /dev/null
@@ -0,0 +1,318 @@
+/*
+ * Freescale Media5200 board Device Tree Source
+ *
+ * Copyright 2009 Secret Lab Technologies Ltd.
+ * Grant Likely <grant.likely@secretlab.ca>
+ * Steven Cavanagh <scavanagh@secretlab.ca>
+ *
+ * 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.
+ */
+
+/dts-v1/;
+
+/ {
+       model = "fsl,media5200";
+       compatible = "fsl,media5200";
+       #address-cells = <1>;
+       #size-cells = <1>;
+       interrupt-parent = <&mpc5200_pic>;
+
+       aliases {
+               console = &console;
+               ethernet0 = &eth0;
+       };
+
+       chosen {
+               linux,stdout-path = &console;
+       };
+
+       cpus {
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               PowerPC,5200@0 {
+                       device_type = "cpu";
+                       reg = <0>;
+                       d-cache-line-size = <32>;
+                       i-cache-line-size = <32>;
+                       d-cache-size = <0x4000>;                // L1, 16K
+                       i-cache-size = <0x4000>;                // L1, 16K
+                       timebase-frequency = <33000000>;        // 33 MHz, these were configured by U-Boot
+                       bus-frequency = <132000000>;            // 132 MHz
+                       clock-frequency = <396000000>;          // 396 MHz
+               };
+       };
+
+       memory {
+               device_type = "memory";
+               reg = <0x00000000 0x08000000>;  // 128MB RAM
+       };
+
+       soc@f0000000 {
+               #address-cells = <1>;
+               #size-cells = <1>;
+               compatible = "fsl,mpc5200b-immr";
+               ranges = <0 0xf0000000 0x0000c000>;
+               reg = <0xf0000000 0x00000100>;
+               bus-frequency = <132000000>;// 132 MHz
+               system-frequency = <0>;         // from bootloader
+
+               cdm@200 {
+                       compatible = "fsl,mpc5200b-cdm","fsl,mpc5200-cdm";
+                       reg = <0x200 0x38>;
+               };
+
+               mpc5200_pic: interrupt-controller@500 {
+                       // 5200 interrupts are encoded into two levels;
+                       interrupt-controller;
+                       #interrupt-cells = <3>;
+                       compatible = "fsl,mpc5200b-pic","fsl,mpc5200-pic";
+                       reg = <0x500 0x80>;
+               };
+
+               timer@600 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x600 0x10>;
+                       interrupts = <1 9 0>;
+                       fsl,has-wdt;
+               };
+
+               timer@610 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x610 0x10>;
+                       interrupts = <1 10 0>;
+               };
+
+               timer@620 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x620 0x10>;
+                       interrupts = <1 11 0>;
+               };
+
+               timer@630 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x630 0x10>;
+                       interrupts = <1 12 0>;
+               };
+
+               timer@640 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x640 0x10>;
+                       interrupts = <1 13 0>;
+               };
+
+               timer@650 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x650 0x10>;
+                       interrupts = <1 14 0>;
+               };
+
+               timer@660 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x660 0x10>;
+                       interrupts = <1 15 0>;
+               };
+
+               timer@670 {     // General Purpose Timer
+                       compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
+                       reg = <0x670 0x10>;
+                       interrupts = <1 16 0>;
+               };
+
+               rtc@800 {       // Real time clock
+                       compatible = "fsl,mpc5200b-rtc","fsl,mpc5200-rtc";
+                       reg = <0x800 0x100>;
+                       interrupts = <1 5 0 1 6 0>;
+               };
+
+               can@900 {
+                       compatible = "fsl,mpc5200b-mscan","fsl,mpc5200-mscan";
+                       interrupts = <2 17 0>;
+                       reg = <0x900 0x80>;
+               };
+
+               can@980 {
+                       compatible = "fsl,mpc5200b-mscan","fsl,mpc5200-mscan";
+                       interrupts = <2 18 0>;
+                       reg = <0x980 0x80>;
+               };
+
+               gpio_simple: gpio@b00 {
+                       compatible = "fsl,mpc5200b-gpio","fsl,mpc5200-gpio";
+                       reg = <0xb00 0x40>;
+                       interrupts = <1 7 0>;
+                       gpio-controller;
+                       #gpio-cells = <2>;
+               };
+
+               gpio_wkup: gpio@c00 {
+                       compatible = "fsl,mpc5200b-gpio-wkup","fsl,mpc5200-gpio-wkup";
+                       reg = <0xc00 0x40>;
+                       interrupts = <1 8 0 0 3 0>;
+                       gpio-controller;
+                       #gpio-cells = <2>;
+               };
+
+               spi@f00 {
+                       compatible = "fsl,mpc5200b-spi","fsl,mpc5200-spi";
+                       reg = <0xf00 0x20>;
+                       interrupts = <2 13 0 2 14 0>;
+               };
+
+               usb@1000 {
+                       compatible = "fsl,mpc5200b-ohci","fsl,mpc5200-ohci","ohci-be";
+                       reg = <0x1000 0x100>;
+                       interrupts = <2 6 0>;
+               };
+
+               dma-controller@1200 {
+                       compatible = "fsl,mpc5200b-bestcomm","fsl,mpc5200-bestcomm";
+                       reg = <0x1200 0x80>;
+                       interrupts = <3 0 0  3 1 0  3 2 0  3 3 0
+                                     3 4 0  3 5 0  3 6 0  3 7 0
+                                     3 8 0  3 9 0  3 10 0  3 11 0
+                                     3 12 0  3 13 0  3 14 0  3 15 0>;
+               };
+
+               xlb@1f00 {
+                       compatible = "fsl,mpc5200b-xlb","fsl,mpc5200-xlb";
+                       reg = <0x1f00 0x100>;
+               };
+
+               // PSC6 in uart mode
+               console: serial@2c00 {          // PSC6
+                       compatible = "fsl,mpc5200b-psc-uart","fsl,mpc5200-psc-uart";
+                       cell-index = <5>;
+                       port-number = <0>;  // Logical port assignment
+                       reg = <0x2c00 0x100>;
+                       interrupts = <2 4 0>;
+               };
+
+               eth0: ethernet@3000 {
+                       compatible = "fsl,mpc5200b-fec","fsl,mpc5200-fec";
+                       reg = <0x3000 0x400>;
+                       local-mac-address = [ 00 00 00 00 00 00 ];
+                       interrupts = <2 5 0>;
+                       phy-handle = <&phy0>;
+               };
+
+               mdio@3000 {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       compatible = "fsl,mpc5200b-mdio","fsl,mpc5200-mdio";
+                       reg = <0x3000 0x400>;   // fec range, since we need to setup fec interrupts
+                       interrupts = <2 5 0>;   // these are for "mii command finished", not link changes & co.
+
+                       phy0: ethernet-phy@0 {
+                               reg = <0>;
+                       };
+               };
+
+               ata@3a00 {
+                       compatible = "fsl,mpc5200b-ata","fsl,mpc5200-ata";
+                       reg = <0x3a00 0x100>;
+                       interrupts = <2 7 0>;
+               };
+
+               i2c@3d00 {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c";
+                       reg = <0x3d00 0x40>;
+                       interrupts = <2 15 0>;
+                       fsl5200-clocking;
+               };
+
+               i2c@3d40 {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c";
+                       reg = <0x3d40 0x40>;
+                       interrupts = <2 16 0>;
+                       fsl5200-clocking;
+               };
+
+               sram@8000 {
+                       compatible = "fsl,mpc5200b-sram","fsl,mpc5200-sram";
+                       reg = <0x8000 0x4000>;
+               };
+       };
+
+       pci@f0000d00 {
+               #interrupt-cells = <1>;
+               #size-cells = <2>;
+               #address-cells = <3>;
+               device_type = "pci";
+               compatible = "fsl,mpc5200b-pci","fsl,mpc5200-pci";
+               reg = <0xf0000d00 0x100>;
+               interrupt-map-mask = <0xf800 0 0 7>;
+               interrupt-map = <0xc000 0 0 1 &media5200_fpga 0 2 // 1st slot
+                                0xc000 0 0 2 &media5200_fpga 0 3
+                                0xc000 0 0 3 &media5200_fpga 0 4
+                                0xc000 0 0 4 &media5200_fpga 0 5
+
+                                0xc800 0 0 1 &media5200_fpga 0 3 // 2nd slot
+                                0xc800 0 0 2 &media5200_fpga 0 4
+                                0xc800 0 0 3 &media5200_fpga 0 5
+                                0xc800 0 0 4 &media5200_fpga 0 2
+
+                                0xd000 0 0 1 &media5200_fpga 0 4 // miniPCI
+                                0xd000 0 0 2 &media5200_fpga 0 5
+
+                                0xe000 0 0 1 &media5200_fpga 0 5 // CoralIP
+                               >;
+               clock-frequency = <0>; // From boot loader
+               interrupts = <2 8 0 2 9 0 2 10 0>;
+               interrupt-parent = <&mpc5200_pic>;
+               bus-range = <0 0>;
+               ranges = <0x42000000 0 0x80000000 0x80000000 0 0x20000000
+                         0x02000000 0 0xa0000000 0xa0000000 0 0x10000000
+                         0x01000000 0 0x00000000 0xb0000000 0 0x01000000>;
+       };
+
+       localbus {
+               compatible = "fsl,mpc5200b-lpb","simple-bus";
+               #address-cells = <2>;
+               #size-cells = <1>;
+
+               ranges = < 0 0 0xfc000000 0x02000000
+                          1 0 0xfe000000 0x02000000
+                          2 0 0xf0010000 0x00010000
+                          3 0 0xf0020000 0x00010000 >;
+
+               flash@0,0 {
+                       compatible = "amd,am29lv28ml", "cfi-flash";
+                       reg = <0 0x0 0x2000000>;                // 32 MB
+                       bank-width = <4>;                       // Width in bytes of the flash bank
+                       device-width = <2>;                     // Two devices on each bank
+               };
+
+               flash@1,0 {
+                       compatible = "amd,am29lv28ml", "cfi-flash";
+                       reg = <1 0 0x2000000>;                  // 32 MB
+                       bank-width = <4>;                       // Width in bytes of the flash bank
+                       device-width = <2>;                     // Two devices on each bank
+               };
+
+               media5200_fpga: fpga@2,0 {
+                       compatible = "fsl,media5200-fpga";
+                       interrupt-controller;
+                       #interrupt-cells = <2>; // 0:bank 1:id; no type field
+                       reg = <2 0 0x10000>;
+
+                       interrupt-parent = <&mpc5200_pic>;
+                       interrupts = <0 0 3     // IRQ bank 0
+                                     1 1 3>;   // IRQ bank 1
+               };
+
+               uart@3,0 {
+                       compatible = "ti,tl16c752bpt";
+                       reg = <3 0 0x10000>;
+                       interrupt-parent = <&media5200_fpga>;
+                       interrupts = <0 0  0 1>; // 2 irqs
+               };
+       };
+};
index 696a5ee4962d20c81737b5a36db3ece5a13041bd..c01db1316b01ae2fe8adb58f760ce0fef1e78d08 100644 (file)
@@ -35,6 +35,11 @@ config PPC_LITE5200
        depends on PPC_MPC52xx
        select DEFAULT_UIMAGE
 
+config PPC_MEDIA5200
+       bool "Freescale Media5200 Eval Board"
+       depends on PPC_MPC52xx
+       select DEFAULT_UIMAGE
+
 config PPC_MPC5200_BUGFIX
        bool "MPC5200 (L25R) bugfix support"
        depends on PPC_MPC52xx
index d6ade3d5f19901c075b9196d1b566128f9871671..bfd4f52cf3dd785a3827e78bffcb7fcc6a168f5e 100644 (file)
@@ -7,6 +7,7 @@ obj-$(CONFIG_PCI)               += mpc52xx_pci.o
 obj-$(CONFIG_PPC_MPC5200_SIMPLE) += mpc5200_simple.o
 obj-$(CONFIG_PPC_EFIKA)                += efika.o
 obj-$(CONFIG_PPC_LITE5200)     += lite5200.o
+obj-$(CONFIG_PPC_MEDIA5200)    += media5200.o
 
 obj-$(CONFIG_PM)               += mpc52xx_sleep.o mpc52xx_pm.o
 ifeq ($(CONFIG_PPC_LITE5200),y)
diff --git a/arch/powerpc/platforms/52xx/media5200.c b/arch/powerpc/platforms/52xx/media5200.c
new file mode 100644 (file)
index 0000000..68e4f16
--- /dev/null
@@ -0,0 +1,273 @@
+/*
+ * Support for 'media5200-platform' compatible boards.
+ *
+ * Copyright (C) 2008 Secret Lab Technologies Ltd.
+ *
+ * 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.
+ *
+ * Description:
+ * This code implements support for the Freescape Media5200 platform
+ * (built around the MPC5200 SoC).
+ *
+ * Notable characteristic of the Media5200 is the presence of an FPGA
+ * that has all external IRQ lines routed through it.  This file implements
+ * a cascaded interrupt controller driver which attaches itself to the
+ * Virtual IRQ subsystem after the primary mpc5200 interrupt controller
+ * is initialized.
+ *
+ */
+
+#undef DEBUG
+
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <asm/time.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/mpc52xx.h>
+
+static struct of_device_id mpc5200_gpio_ids[] __initdata = {
+       { .compatible = "fsl,mpc5200-gpio", },
+       { .compatible = "mpc5200-gpio", },
+       {}
+};
+
+/* FPGA register set */
+#define MEDIA5200_IRQ_ENABLE (0x40c)
+#define MEDIA5200_IRQ_STATUS (0x410)
+#define MEDIA5200_NUM_IRQS   (6)
+#define MEDIA5200_IRQ_SHIFT  (32 - MEDIA5200_NUM_IRQS)
+
+struct media5200_irq {
+       void __iomem *regs;
+       spinlock_t lock;
+       struct irq_host *irqhost;
+};
+struct media5200_irq media5200_irq;
+
+static void media5200_irq_unmask(unsigned int virq)
+{
+       unsigned long flags;
+       u32 val;
+
+       spin_lock_irqsave(&media5200_irq.lock, flags);
+       val = in_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE);
+       val |= 1 << (MEDIA5200_IRQ_SHIFT + irq_map[virq].hwirq);
+       out_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE, val);
+       spin_unlock_irqrestore(&media5200_irq.lock, flags);
+}
+
+static void media5200_irq_mask(unsigned int virq)
+{
+       unsigned long flags;
+       u32 val;
+
+       spin_lock_irqsave(&media5200_irq.lock, flags);
+       val = in_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE);
+       val &= ~(1 << (MEDIA5200_IRQ_SHIFT + irq_map[virq].hwirq));
+       out_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE, val);
+       spin_unlock_irqrestore(&media5200_irq.lock, flags);
+}
+
+static struct irq_chip media5200_irq_chip = {
+       .typename = "Media5200 FPGA",
+       .unmask = media5200_irq_unmask,
+       .mask = media5200_irq_mask,
+       .mask_ack = media5200_irq_mask,
+};
+
+void media5200_irq_cascade(unsigned int virq, struct irq_desc *desc)
+{
+       int sub_virq, val;
+       u32 status, enable;
+
+       /* Mask off the cascaded IRQ */
+       spin_lock(&desc->lock);
+       desc->chip->mask(virq);
+       spin_unlock(&desc->lock);
+
+       /* Ask the FPGA for IRQ status.  If 'val' is 0, then no irqs
+        * are pending.  'ffs()' is 1 based */
+       status = in_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE);
+       enable = in_be32(media5200_irq.regs + MEDIA5200_IRQ_STATUS);
+       val = ffs((status & enable) >> MEDIA5200_IRQ_SHIFT);
+       if (val) {
+               sub_virq = irq_linear_revmap(media5200_irq.irqhost, val - 1);
+               /* pr_debug("%s: virq=%i s=%.8x e=%.8x hwirq=%i subvirq=%i\n",
+                *          __func__, virq, status, enable, val - 1, sub_virq);
+                */
+               generic_handle_irq(sub_virq);
+       }
+
+       /* Processing done; can reenable the cascade now */
+       spin_lock(&desc->lock);
+       desc->chip->ack(virq);
+       if (!(desc->status & IRQ_DISABLED))
+               desc->chip->unmask(virq);
+       spin_unlock(&desc->lock);
+}
+
+static int media5200_irq_map(struct irq_host *h, unsigned int virq,
+                            irq_hw_number_t hw)
+{
+       struct irq_desc *desc = get_irq_desc(virq);
+
+       pr_debug("%s: h=%p, virq=%i, hwirq=%i\n", __func__, h, virq, (int)hw);
+       set_irq_chip_data(virq, &media5200_irq);
+       set_irq_chip_and_handler(virq, &media5200_irq_chip, handle_level_irq);
+       set_irq_type(virq, IRQ_TYPE_LEVEL_LOW);
+       desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
+       desc->status |= IRQ_TYPE_LEVEL_LOW | IRQ_LEVEL;
+
+       return 0;
+}
+
+static int media5200_irq_xlate(struct irq_host *h, struct device_node *ct,
+                                u32 *intspec, unsigned int intsize,
+                                irq_hw_number_t *out_hwirq,
+                                unsigned int *out_flags)
+{
+       if (intsize != 2)
+               return -1;
+
+       pr_debug("%s: bank=%i, number=%i\n", __func__, intspec[0], intspec[1]);
+       *out_hwirq = intspec[1];
+       *out_flags = IRQ_TYPE_NONE;
+       return 0;
+}
+
+static struct irq_host_ops media5200_irq_ops = {
+       .map = media5200_irq_map,
+       .xlate = media5200_irq_xlate,
+};
+
+/*
+ * Setup Media5200 IRQ mapping
+ */
+static void __init media5200_init_irq(void)
+{
+       struct device_node *fpga_np;
+       int cascade_virq;
+
+       /* First setup the regular MPC5200 interrupt controller */
+       mpc52xx_init_irq();
+
+       /* Now find the FPGA IRQ */
+       fpga_np = of_find_compatible_node(NULL, NULL, "fsl,media5200-fpga");
+       if (!fpga_np)
+               goto out;
+       pr_debug("%s: found fpga node: %s\n", __func__, fpga_np->full_name);
+
+       media5200_irq.regs = of_iomap(fpga_np, 0);
+       if (!media5200_irq.regs)
+               goto out;
+       pr_debug("%s: mapped to %p\n", __func__, media5200_irq.regs);
+
+       cascade_virq = irq_of_parse_and_map(fpga_np, 0);
+       if (!cascade_virq)
+               goto out;
+       pr_debug("%s: cascaded on virq=%i\n", __func__, cascade_virq);
+
+       /* Disable all FPGA IRQs */
+       out_be32(media5200_irq.regs + MEDIA5200_IRQ_ENABLE, 0);
+
+       spin_lock_init(&media5200_irq.lock);
+
+       media5200_irq.irqhost = irq_alloc_host(fpga_np, IRQ_HOST_MAP_LINEAR,
+                                              MEDIA5200_NUM_IRQS,
+                                              &media5200_irq_ops, -1);
+       if (!media5200_irq.irqhost)
+               goto out;
+       pr_debug("%s: allocated irqhost\n", __func__);
+
+       media5200_irq.irqhost->host_data = &media5200_irq;
+
+       set_irq_data(cascade_virq, &media5200_irq);
+       set_irq_chained_handler(cascade_virq, media5200_irq_cascade);
+
+       return;
+
+ out:
+       pr_err("Could not find Media5200 FPGA; PCI interrupts will not work\n");
+}
+
+/*
+ * Setup the architecture
+ */
+static void __init media5200_setup_arch(void)
+{
+
+       struct device_node *np;
+       struct mpc52xx_gpio __iomem *gpio;
+       u32 port_config;
+
+       if (ppc_md.progress)
+               ppc_md.progress("media5200_setup_arch()", 0);
+
+       /* Map important registers from the internal memory map */
+       mpc52xx_map_common_devices();
+
+       /* Some mpc5200 & mpc5200b related configuration */
+       mpc5200_setup_xlb_arbiter();
+
+       mpc52xx_setup_pci();
+
+       np = of_find_matching_node(NULL, mpc5200_gpio_ids);
+       gpio = of_iomap(np, 0);
+       of_node_put(np);
+       if (!gpio) {
+               printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
+                      __func__);
+               return;
+       }
+
+       /* Set port config */
+       port_config = in_be32(&gpio->port_config);
+
+       port_config &= ~0x03000000;     /* ATA CS is on csb_4/5         */
+       port_config |=  0x01000000;
+
+       out_be32(&gpio->port_config, port_config);
+
+       /* Unmap zone */
+       iounmap(gpio);
+
+}
+
+/* list of the supported boards */
+static char *board[] __initdata = {
+       "fsl,media5200",
+       NULL
+};
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init media5200_probe(void)
+{
+       unsigned long node = of_get_flat_dt_root();
+       int i = 0;
+
+       while (board[i]) {
+               if (of_flat_dt_is_compatible(node, board[i]))
+                       break;
+               i++;
+       }
+
+       return (board[i] != NULL);
+}
+
+define_machine(media5200_platform) {
+       .name           = "media5200-platform",
+       .probe          = media5200_probe,
+       .setup_arch     = media5200_setup_arch,
+       .init           = mpc52xx_declare_of_platform_devices,
+       .init_IRQ       = media5200_init_irq,
+       .get_irq        = mpc52xx_get_irq,
+       .restart        = mpc52xx_restart,
+       .calibrate_decr = generic_calibrate_decr,
+};