MIPS: Add support for NXP PNX833x (STB222/5) into linux kernel

The following patch add support for the NXP PNX833x SOC.  More
specifically it adds support for the STB222/5 variant. It fixes
the vectored interrupt issue.

Signed-off-by: daniel.j.laird <daniel.j.laird@nxp.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

8 files changed, 1017 insertions, 0 deletions

diff --git a/arch/mips/nxp/pnx833x/common/Makefile b/arch/mips/nxp/pnx833x/common/Makefile
new file mode 100644
index 0000000..4a16f3b
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/common/Makefile
@@ -0,0 +1,3 @@
+obj-y := interrupts.o platform.o prom.o setup.o reset.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/nxp/pnx833x/common/interrupts.c b/arch/mips/nxp/pnx833x/common/interrupts.c
new file mode 100644
index 0000000..30533ba
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/common/interrupts.c
@@ -0,0 +1,380 @@
+/*
+ *  interrupts.c: Interrupt mappings for PNX833X.
+ *
+ *  Copyright 2008 NXP Semiconductors
+ *	  Chris Steel <chris.steel@nxp.com>
+ *    Daniel Laird <daniel.j.laird@nxp.com>
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/kernel.h>
+#include <linux/irq.h>
+#include <linux/hardirq.h>
+#include <linux/interrupt.h>
+#include <asm/mipsregs.h>
+#include <asm/irq_cpu.h>
+#include <irq.h>
+#include <irq-mapping.h>
+#include <gpio.h>
+
+static int mips_cpu_timer_irq;
+
+static const unsigned int irq_prio[PNX833X_PIC_NUM_IRQ] =
+{
+    0, /* unused */
+    4, /* PNX833X_PIC_I2C0_INT                 1 */
+    4, /* PNX833X_PIC_I2C1_INT                 2 */
+    1, /* PNX833X_PIC_UART0_INT                3 */
+    1, /* PNX833X_PIC_UART1_INT                4 */
+    6, /* PNX833X_PIC_TS_IN0_DV_INT            5 */
+    6, /* PNX833X_PIC_TS_IN0_DMA_INT           6 */
+    7, /* PNX833X_PIC_GPIO_INT                 7 */
+    4, /* PNX833X_PIC_AUDIO_DEC_INT            8 */
+    5, /* PNX833X_PIC_VIDEO_DEC_INT            9 */
+    4, /* PNX833X_PIC_CONFIG_INT              10 */
+    4, /* PNX833X_PIC_AOI_INT                 11 */
+    9, /* PNX833X_PIC_SYNC_INT                12 */
+    9, /* PNX8335_PIC_SATA_INT                13 */
+    4, /* PNX833X_PIC_OSD_INT                 14 */
+    9, /* PNX833X_PIC_DISP1_INT               15 */
+    4, /* PNX833X_PIC_DEINTERLACER_INT        16 */
+    9, /* PNX833X_PIC_DISPLAY2_INT            17 */
+    4, /* PNX833X_PIC_VC_INT                  18 */
+    4, /* PNX833X_PIC_SC_INT                  19 */
+    9, /* PNX833X_PIC_IDE_INT                 20 */
+    9, /* PNX833X_PIC_IDE_DMA_INT             21 */
+    6, /* PNX833X_PIC_TS_IN1_DV_INT           22 */
+    6, /* PNX833X_PIC_TS_IN1_DMA_INT          23 */
+    4, /* PNX833X_PIC_SGDX_DMA_INT            24 */
+    4, /* PNX833X_PIC_TS_OUT_INT              25 */
+    4, /* PNX833X_PIC_IR_INT                  26 */
+    3, /* PNX833X_PIC_VMSP1_INT               27 */
+    3, /* PNX833X_PIC_VMSP2_INT               28 */
+    4, /* PNX833X_PIC_PIBC_INT                29 */
+    4, /* PNX833X_PIC_TS_IN0_TRD_INT          30 */
+    4, /* PNX833X_PIC_SGDX_TPD_INT            31 */
+    5, /* PNX833X_PIC_USB_INT                 32 */
+    4, /* PNX833X_PIC_TS_IN1_TRD_INT          33 */
+    4, /* PNX833X_PIC_CLOCK_INT               34 */
+    4, /* PNX833X_PIC_SGDX_PARSER_INT         35 */
+    4, /* PNX833X_PIC_VMSP_DMA_INT            36 */
+#if defined(CONFIG_SOC_PNX8335)
+    4, /* PNX8335_PIC_MIU_INT                 37 */
+    4, /* PNX8335_PIC_AVCHIP_IRQ_INT          38 */
+    9, /* PNX8335_PIC_SYNC_HD_INT             39 */
+    9, /* PNX8335_PIC_DISP_HD_INT             40 */
+    9, /* PNX8335_PIC_DISP_SCALER_INT         41 */
+    4, /* PNX8335_PIC_OSD_HD1_INT             42 */
+    4, /* PNX8335_PIC_DTL_WRITER_Y_INT        43 */
+    4, /* PNX8335_PIC_DTL_WRITER_C_INT        44 */
+    4, /* PNX8335_PIC_DTL_EMULATOR_Y_IR_INT   45 */
+    4, /* PNX8335_PIC_DTL_EMULATOR_C_IR_INT   46 */
+    4, /* PNX8335_PIC_DENC_TTX_INT            47 */
+    4, /* PNX8335_PIC_MMI_SIF0_INT            48 */
+    4, /* PNX8335_PIC_MMI_SIF1_INT            49 */
+    4, /* PNX8335_PIC_MMI_CDMMU_INT           50 */
+    4, /* PNX8335_PIC_PIBCS_INT               51 */
+   12, /* PNX8335_PIC_ETHERNET_INT            52 */
+    3, /* PNX8335_PIC_VMSP1_0_INT             53 */
+    3, /* PNX8335_PIC_VMSP1_1_INT             54 */
+    4, /* PNX8335_PIC_VMSP1_DMA_INT           55 */
+    4, /* PNX8335_PIC_TDGR_DE_INT             56 */
+    4, /* PNX8335_PIC_IR1_IRQ_INT             57 */
+#endif
+};
+
+static void pnx833x_timer_dispatch(void)
+{
+	do_IRQ(mips_cpu_timer_irq);
+}
+
+static void pic_dispatch(void)
+{
+	unsigned int irq = PNX833X_REGFIELD(PIC_INT_SRC, INT_SRC);
+
+	if ((irq >= 1) && (irq < (PNX833X_PIC_NUM_IRQ))) {
+		unsigned long priority = PNX833X_PIC_INT_PRIORITY;
+		PNX833X_PIC_INT_PRIORITY = irq_prio[irq];
+
+		if (irq == PNX833X_PIC_GPIO_INT) {
+			unsigned long mask = PNX833X_PIO_INT_STATUS & PNX833X_PIO_INT_ENABLE;
+			int pin;
+			while ((pin = ffs(mask & 0xffff))) {
+				pin -= 1;
+				do_IRQ(PNX833X_GPIO_IRQ_BASE + pin);
+				mask &= ~(1 << pin);
+			}
+		} else {
+			do_IRQ(irq + PNX833X_PIC_IRQ_BASE);
+		}
+
+		PNX833X_PIC_INT_PRIORITY = priority;
+	} else {
+		printk(KERN_ERR "plat_irq_dispatch: unexpected irq %u\n", irq);
+	}
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned int pending = read_c0_status() & read_c0_cause();
+
+	if (pending & STATUSF_IP4)
+		pic_dispatch();
+	else if (pending & STATUSF_IP7)
+		do_IRQ(PNX833X_TIMER_IRQ);
+	else
+		spurious_interrupt();
+}
+
+static inline void pnx833x_hard_enable_pic_irq(unsigned int irq)
+{
+	/* Currently we do this by setting IRQ priority to 1.
+	   If priority support is being implemented, 1 should be repalced
+		by a better value. */
+	PNX833X_PIC_INT_REG(irq) = irq_prio[irq];
+}
+
+static inline void pnx833x_hard_disable_pic_irq(unsigned int irq)
+{
+	/* Disable IRQ by writing setting it's priority to 0 */
+	PNX833X_PIC_INT_REG(irq) = 0;
+}
+
+static int irqflags[PNX833X_PIC_NUM_IRQ];	/* initialized by zeroes */
+#define IRQFLAG_STARTED		1
+#define IRQFLAG_DISABLED	2
+
+static DEFINE_SPINLOCK(pnx833x_irq_lock);
+
+static unsigned int pnx833x_startup_pic_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned int pic_irq = irq - PNX833X_PIC_IRQ_BASE;
+
+	spin_lock_irqsave(&pnx833x_irq_lock, flags);
+
+	irqflags[pic_irq] = IRQFLAG_STARTED;	/* started, not disabled */
+	pnx833x_hard_enable_pic_irq(pic_irq);
+
+	spin_unlock_irqrestore(&pnx833x_irq_lock, flags);
+	return 0;
+}
+
+static void pnx833x_shutdown_pic_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned int pic_irq = irq - PNX833X_PIC_IRQ_BASE;
+
+	spin_lock_irqsave(&pnx833x_irq_lock, flags);
+
+	irqflags[pic_irq] = 0;			/* not started */
+	pnx833x_hard_disable_pic_irq(pic_irq);
+
+	spin_unlock_irqrestore(&pnx833x_irq_lock, flags);
+}
+
+static void pnx833x_enable_pic_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned int pic_irq = irq - PNX833X_PIC_IRQ_BASE;
+
+	spin_lock_irqsave(&pnx833x_irq_lock, flags);
+
+	irqflags[pic_irq] &= ~IRQFLAG_DISABLED;
+	if (irqflags[pic_irq] == IRQFLAG_STARTED)
+		pnx833x_hard_enable_pic_irq(pic_irq);
+
+	spin_unlock_irqrestore(&pnx833x_irq_lock, flags);
+}
+
+static void pnx833x_disable_pic_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned int pic_irq = irq - PNX833X_PIC_IRQ_BASE;
+
+	spin_lock_irqsave(&pnx833x_irq_lock, flags);
+
+	irqflags[pic_irq] |= IRQFLAG_DISABLED;
+	pnx833x_hard_disable_pic_irq(pic_irq);
+
+	spin_unlock_irqrestore(&pnx833x_irq_lock, flags);
+}
+
+static void pnx833x_ack_pic_irq(unsigned int irq)
+{
+}
+
+static void pnx833x_end_pic_irq(unsigned int irq)
+{
+}
+
+static DEFINE_SPINLOCK(pnx833x_gpio_pnx833x_irq_lock);
+
+static unsigned int pnx833x_startup_gpio_irq(unsigned int irq)
+{
+	int pin = irq - PNX833X_GPIO_IRQ_BASE;
+	unsigned long flags;
+	spin_lock_irqsave(&pnx833x_gpio_pnx833x_irq_lock, flags);
+	pnx833x_gpio_enable_irq(pin);
+	spin_unlock_irqrestore(&pnx833x_gpio_pnx833x_irq_lock, flags);
+	return 0;
+}
+
+static void pnx833x_enable_gpio_irq(unsigned int irq)
+{
+	int pin = irq - PNX833X_GPIO_IRQ_BASE;
+	unsigned long flags;
+	spin_lock_irqsave(&pnx833x_gpio_pnx833x_irq_lock, flags);
+	pnx833x_gpio_enable_irq(pin);
+	spin_unlock_irqrestore(&pnx833x_gpio_pnx833x_irq_lock, flags);
+}
+
+static void pnx833x_disable_gpio_irq(unsigned int irq)
+{
+	int pin = irq - PNX833X_GPIO_IRQ_BASE;
+	unsigned long flags;
+	spin_lock_irqsave(&pnx833x_gpio_pnx833x_irq_lock, flags);
+	pnx833x_gpio_disable_irq(pin);
+	spin_unlock_irqrestore(&pnx833x_gpio_pnx833x_irq_lock, flags);
+}
+
+static void pnx833x_ack_gpio_irq(unsigned int irq)
+{
+}
+
+static void pnx833x_end_gpio_irq(unsigned int irq)
+{
+	int pin = irq - PNX833X_GPIO_IRQ_BASE;
+	unsigned long flags;
+	spin_lock_irqsave(&pnx833x_gpio_pnx833x_irq_lock, flags);
+	pnx833x_gpio_clear_irq(pin);
+	spin_unlock_irqrestore(&pnx833x_gpio_pnx833x_irq_lock, flags);
+}
+
+static int pnx833x_set_type_gpio_irq(unsigned int irq, unsigned int flow_type)
+{
+	int pin = irq - PNX833X_GPIO_IRQ_BASE;
+	int gpio_mode;
+
+	switch (flow_type) {
+	case IRQ_TYPE_EDGE_RISING:
+		gpio_mode = GPIO_INT_EDGE_RISING;
+		break;
+	case IRQ_TYPE_EDGE_FALLING:
+		gpio_mode = GPIO_INT_EDGE_FALLING;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		gpio_mode = GPIO_INT_EDGE_BOTH;
+		break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		gpio_mode = GPIO_INT_LEVEL_HIGH;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		gpio_mode = GPIO_INT_LEVEL_LOW;
+		break;
+	default:
+		gpio_mode = GPIO_INT_NONE;
+		break;
+	}
+
+	pnx833x_gpio_setup_irq(gpio_mode, pin);
+
+	return 0;
+}
+
+static struct irq_chip pnx833x_pic_irq_type = {
+	.typename = "PNX-PIC",
+	.startup = pnx833x_startup_pic_irq,
+	.shutdown = pnx833x_shutdown_pic_irq,
+	.enable = pnx833x_enable_pic_irq,
+	.disable = pnx833x_disable_pic_irq,
+	.ack = pnx833x_ack_pic_irq,
+	.end = pnx833x_end_pic_irq
+};
+
+static struct irq_chip pnx833x_gpio_irq_type = {
+	.typename = "PNX-GPIO",
+	.startup = pnx833x_startup_gpio_irq,
+	.shutdown = pnx833x_disable_gpio_irq,
+	.enable = pnx833x_enable_gpio_irq,
+	.disable = pnx833x_disable_gpio_irq,
+	.ack = pnx833x_ack_gpio_irq,
+	.end = pnx833x_end_gpio_irq,
+	.set_type = pnx833x_set_type_gpio_irq
+};
+
+void __init arch_init_irq(void)
+{
+	unsigned int irq;
+
+	/* setup standard internal cpu irqs */
+	mips_cpu_irq_init();
+
+	/* Set IRQ information in irq_desc */
+	for (irq = PNX833X_PIC_IRQ_BASE; irq < (PNX833X_PIC_IRQ_BASE + PNX833X_PIC_NUM_IRQ); irq++) {
+		pnx833x_hard_disable_pic_irq(irq);
+		set_irq_chip_and_handler(irq, &pnx833x_pic_irq_type, handle_simple_irq);
+	}
+
+	for (irq = PNX833X_GPIO_IRQ_BASE; irq < (PNX833X_GPIO_IRQ_BASE + PNX833X_GPIO_NUM_IRQ); irq++)
+		set_irq_chip_and_handler(irq, &pnx833x_gpio_irq_type, handle_simple_irq);
+
+	/* Set PIC priority limiter register to 0 */
+	PNX833X_PIC_INT_PRIORITY = 0;
+
+	/* Setup GPIO IRQ dispatching */
+	pnx833x_startup_pic_irq(PNX833X_PIC_GPIO_INT);
+
+	/* Enable PIC IRQs (HWIRQ2) */
+	if (cpu_has_vint)
+		set_vi_handler(4, pic_dispatch);
+
+	write_c0_status(read_c0_status() | IE_IRQ2);
+}
+
+unsigned int __cpuinit get_c0_compare_int(void)
+{
+	if (cpu_has_vint)
+		set_vi_handler(cp0_compare_irq, pnx833x_timer_dispatch);
+
+	mips_cpu_timer_irq = MIPS_CPU_IRQ_BASE + cp0_compare_irq;
+	return mips_cpu_timer_irq;
+}
+
+void __init plat_time_init(void)
+{
+	/* calculate mips_hpt_frequency based on PNX833X_CLOCK_CPUCP_CTL reg */
+
+	extern unsigned long mips_hpt_frequency;
+	unsigned long reg = PNX833X_CLOCK_CPUCP_CTL;
+
+	if (!(PNX833X_BIT(reg, CLOCK_CPUCP_CTL, EXIT_RESET))) {
+		/* Functional clock is disabled so use crystal frequency */
+		mips_hpt_frequency = 25;
+	} else {
+#if defined(CONFIG_SOC_PNX8335)
+		/* Functional clock is enabled, so get clock multiplier */
+		mips_hpt_frequency = 90 + (10 * PNX8335_REGFIELD(CLOCK_PLL_CPU_CTL, FREQ));
+#else
+		static const unsigned long int freq[4] = {240, 160, 120, 80};
+		mips_hpt_frequency = freq[PNX833X_FIELD(reg, CLOCK_CPUCP_CTL, DIV_CLOCK)];
+#endif
+	}
+
+	printk(KERN_INFO "CPU clock is %ld MHz\n", mips_hpt_frequency);
+
+	mips_hpt_frequency *= 500000;
+}
+
diff --git a/arch/mips/nxp/pnx833x/common/platform.c b/arch/mips/nxp/pnx833x/common/platform.c
new file mode 100644
index 0000000..b1ccbcc
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/common/platform.c
@@ -0,0 +1,319 @@
+/*
+ *  platform.c: platform support for PNX833X.
+ *
+ *  Copyright 2008 NXP Semiconductors
+ *	  Chris Steel <chris.steel@nxp.com>
+ *    Daniel Laird <daniel.j.laird@nxp.com>
+ *
+ *  Based on software written by:
+ *      Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/resource.h>
+#include <linux/serial.h>
+#include <linux/serial_pnx8xxx.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+
+#ifdef CONFIG_I2C_PNX0105
+/* Until i2c driver available in kernel.*/
+#include <linux/i2c-pnx0105.h>
+#endif
+
+#include <irq.h>
+#include <irq-mapping.h>
+#include <pnx833x.h>
+
+static u64 uart_dmamask     = DMA_32BIT_MASK;
+
+static struct resource pnx833x_uart_resources[] = {
+	[0] = {
+		.start		= PNX833X_UART0_PORTS_START,
+		.end		= PNX833X_UART0_PORTS_END,
+		.flags		= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start		= PNX833X_PIC_UART0_INT,
+		.end		= PNX833X_PIC_UART0_INT,
+		.flags		= IORESOURCE_IRQ,
+	},
+	[2] = {
+		.start		= PNX833X_UART1_PORTS_START,
+		.end		= PNX833X_UART1_PORTS_END,
+		.flags		= IORESOURCE_MEM,
+	},
+	[3] = {
+		.start		= PNX833X_PIC_UART1_INT,
+		.end		= PNX833X_PIC_UART1_INT,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+struct pnx8xxx_port pnx8xxx_ports[] = {
+	[0] = {
+		.port   = {
+			.type		= PORT_PNX8XXX,
+			.iotype		= UPIO_MEM,
+			.membase	= (void __iomem *)PNX833X_UART0_PORTS_START,
+			.mapbase	= PNX833X_UART0_PORTS_START,
+			.irq		= PNX833X_PIC_UART0_INT,
+			.uartclk	= 3692300,
+			.fifosize	= 16,
+			.flags		= UPF_BOOT_AUTOCONF,
+			.line		= 0,
+		},
+	},
+	[1] = {
+		.port   = {
+			.type		= PORT_PNX8XXX,
+			.iotype		= UPIO_MEM,
+			.membase	= (void __iomem *)PNX833X_UART1_PORTS_START,
+			.mapbase	= PNX833X_UART1_PORTS_START,
+			.irq		= PNX833X_PIC_UART1_INT,
+			.uartclk	= 3692300,
+			.fifosize	= 16,
+			.flags		= UPF_BOOT_AUTOCONF,
+			.line		= 1,
+		},
+	},
+};
+
+static struct platform_device pnx833x_uart_device = {
+	.name		= "pnx8xxx-uart",
+	.id		= -1,
+	.dev = {
+		.dma_mask		= &uart_dmamask,
+		.coherent_dma_mask	= DMA_32BIT_MASK,
+		.platform_data		= pnx8xxx_ports,
+	},
+	.num_resources	= ARRAY_SIZE(pnx833x_uart_resources),
+	.resource	= pnx833x_uart_resources,
+};
+
+static u64 ehci_dmamask     = DMA_32BIT_MASK;
+
+static struct resource pnx833x_usb_ehci_resources[] = {
+	[0] = {
+		.start		= PNX833X_USB_PORTS_START,
+		.end		= PNX833X_USB_PORTS_END,
+		.flags		= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start		= PNX833X_PIC_USB_INT,
+		.end		= PNX833X_PIC_USB_INT,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device pnx833x_usb_ehci_device = {
+	.name		= "pnx833x-ehci",
+	.id		= -1,
+	.dev = {
+		.dma_mask		= &ehci_dmamask,
+		.coherent_dma_mask	= DMA_32BIT_MASK,
+	},
+	.num_resources	= ARRAY_SIZE(pnx833x_usb_ehci_resources),
+	.resource	= pnx833x_usb_ehci_resources,
+};
+
+#ifdef CONFIG_I2C_PNX0105
+static struct resource pnx833x_i2c0_resources[] = {
+	{
+		.start		= PNX833X_I2C0_PORTS_START,
+		.end		= PNX833X_I2C0_PORTS_END,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= PNX833X_PIC_I2C0_INT,
+		.end		= PNX833X_PIC_I2C0_INT,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct resource pnx833x_i2c1_resources[] = {
+	{
+		.start		= PNX833X_I2C1_PORTS_START,
+		.end		= PNX833X_I2C1_PORTS_END,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= PNX833X_PIC_I2C1_INT,
+		.end		= PNX833X_PIC_I2C1_INT,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct i2c_pnx0105_dev pnx833x_i2c_dev[] = {
+	{
+		.base = PNX833X_I2C0_PORTS_START,
+		.irq = -1, /* should be PNX833X_PIC_I2C0_INT but polling is faster */
+		.clock = 6,	/* 0 == 400 kHz, 4 == 100 kHz(Maximum HDMI), 6 = 50kHz(Prefered HDCP) */
+		.bus_addr = 0,	/* no slave support */
+	},
+	{
+		.base = PNX833X_I2C1_PORTS_START,
+		.irq = -1,	/* on high freq, polling is faster */
+		/*.irq = PNX833X_PIC_I2C1_INT,*/
+		.clock = 4,	/* 0 == 400 kHz, 4 == 100 kHz. 100 kHz seems a safe default for now */
+		.bus_addr = 0,	/* no slave support */
+	},
+};
+
+static struct platform_device pnx833x_i2c0_device = {
+	.name		= "i2c-pnx0105",
+	.id		= 0,
+	.dev = {
+		.platform_data = &pnx833x_i2c_dev[0],
+	},
+	.num_resources  = ARRAY_SIZE(pnx833x_i2c0_resources),
+	.resource	= pnx833x_i2c0_resources,
+};
+
+static struct platform_device pnx833x_i2c1_device = {
+	.name		= "i2c-pnx0105",
+	.id		= 1,
+	.dev = {
+		.platform_data = &pnx833x_i2c_dev[1],
+	},
+	.num_resources  = ARRAY_SIZE(pnx833x_i2c1_resources),
+	.resource	= pnx833x_i2c1_resources,
+};
+#endif
+
+static u64 ethernet_dmamask = DMA_32BIT_MASK;
+
+static struct resource pnx833x_ethernet_resources[] = {
+	[0] = {
+		.start = PNX8335_IP3902_PORTS_START,
+		.end   = PNX8335_IP3902_PORTS_END,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = PNX8335_PIC_ETHERNET_INT,
+		.end   = PNX8335_PIC_ETHERNET_INT,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device pnx833x_ethernet_device = {
+	.name = "ip3902-eth",
+	.id   = -1,
+	.dev  = {
+		.dma_mask          = &ethernet_dmamask,
+		.coherent_dma_mask = DMA_32BIT_MASK,
+	},
+	.num_resources = ARRAY_SIZE(pnx833x_ethernet_resources),
+	.resource      = pnx833x_ethernet_resources,
+};
+
+static struct resource pnx833x_sata_resources[] = {
+	[0] = {
+		.start = PNX8335_SATA_PORTS_START,
+		.end   = PNX8335_SATA_PORTS_END,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = PNX8335_PIC_SATA_INT,
+		.end   = PNX8335_PIC_SATA_INT,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device pnx833x_sata_device = {
+	.name          = "pnx833x-sata",
+	.id            = -1,
+	.num_resources = ARRAY_SIZE(pnx833x_sata_resources),
+	.resource      = pnx833x_sata_resources,
+};
+
+static const char *part_probes[] = {
+	"cmdlinepart",
+	NULL
+};
+
+static void
+pnx833x_flash_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+	struct nand_chip *this = mtd->priv;
+	unsigned long nandaddr = (unsigned long)this->IO_ADDR_W;
+
+	if (cmd == NAND_CMD_NONE)
+		return;
+
+	if (ctrl & NAND_CLE)
+		writeb(cmd, (void __iomem *)(nandaddr + PNX8335_NAND_CLE_MASK));
+	else
+		writeb(cmd, (void __iomem *)(nandaddr + PNX8335_NAND_ALE_MASK));
+}
+
+static struct platform_nand_data pnx833x_flash_nand_data = {
+	.chip = {
+		.chip_delay		= 25,
+		.part_probe_types 	= part_probes,
+	},
+	.ctrl = {
+		.cmd_ctrl 		= pnx833x_flash_nand_cmd_ctrl
+	}
+};
+
+/*
+ * Set start to be the correct address (PNX8335_NAND_BASE with no 0xb!!),
+ * 12 bytes more seems to be the standard that allows for NAND access.
+ */
+static struct resource pnx833x_flash_nand_resource = {
+	.start 	= PNX8335_NAND_BASE,
+	.end 	= PNX8335_NAND_BASE + 12,
+	.flags 	= IORESOURCE_MEM,
+};
+
+static struct platform_device pnx833x_flash_nand = {
+	.name	        = "gen_nand",
+	.id		        = -1,
+	.num_resources	= 1,
+	.resource	    = &pnx833x_flash_nand_resource,
+	.dev            = {
+		.platform_data = &pnx833x_flash_nand_data,
+	},
+};
+
+static struct platform_device *pnx833x_platform_devices[] __initdata = {
+	&pnx833x_uart_device,
+	&pnx833x_usb_ehci_device,
+#ifdef CONFIG_I2C_PNX0105
+	&pnx833x_i2c0_device,
+	&pnx833x_i2c1_device,
+#endif
+	&pnx833x_ethernet_device,
+	&pnx833x_sata_device,
+	&pnx833x_flash_nand,
+};
+
+static int __init pnx833x_platform_init(void)
+{
+	int res;
+
+	res = platform_add_devices(pnx833x_platform_devices,
+				   ARRAY_SIZE(pnx833x_platform_devices));
+
+	return res;
+}
+
+arch_initcall(pnx833x_platform_init);
diff --git a/arch/mips/nxp/pnx833x/common/prom.c b/arch/mips/nxp/pnx833x/common/prom.c
new file mode 100644
index 0000000..2a41e8f
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/common/prom.c
@@ -0,0 +1,70 @@
+/*
+ *  prom.c:
+ *
+ *  Copyright 2008 NXP Semiconductors
+ *	  Chris Steel <chris.steel@nxp.com>
+ *    Daniel Laird <daniel.j.laird@nxp.com>
+ *
+ *  Based on software written by:
+ *      Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/init.h>
+#include <asm/bootinfo.h>
+#include <linux/string.h>
+
+void __init prom_init_cmdline(void)
+{
+	int argc = fw_arg0;
+	char **argv = (char **)fw_arg1;
+	char *c = &(arcs_cmdline[0]);
+	int i;
+
+	for (i = 1; i < argc; i++) {
+		strcpy(c, argv[i]);
+		c += strlen(argv[i]);
+		if (i < argc-1)
+			*c++ = ' ';
+	}
+	*c = 0;
+}
+
+char __init *prom_getenv(char *envname)
+{
+	extern char **prom_envp;
+	char **env = prom_envp;
+	int i;
+
+	i = strlen(envname);
+
+	while (*env) {
+		if (strncmp(envname, *env, i) == 0 && *(*env+i) == '=')
+			return *env + i + 1;
+		env++;
+	}
+
+	return 0;
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+char * __init prom_getcmdline(void)
+{
+	return arcs_cmdline;
+}
+
diff --git a/arch/mips/nxp/pnx833x/common/reset.c b/arch/mips/nxp/pnx833x/common/reset.c
new file mode 100644
index 0000000..a9bc9ba
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/common/reset.c
@@ -0,0 +1,45 @@
+/*
+ *  reset.c: reset support for PNX833X.
+ *
+ *  Copyright 2008 NXP Semiconductors
+ *	  Chris Steel <chris.steel@nxp.com>
+ *    Daniel Laird <daniel.j.laird@nxp.com>
+ *
+ *  Based on software written by:
+ *      Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/slab.h>
+#include <linux/reboot.h>
+#include <pnx833x.h>
+
+void pnx833x_machine_restart(char *command)
+{
+	PNX833X_RESET_CONTROL_2 = 0;
+	PNX833X_RESET_CONTROL = 0;
+}
+
+void pnx833x_machine_halt(void)
+{
+	while (1)
+		__asm__ __volatile__ ("wait");
+
+}
+
+void pnx833x_machine_power_off(void)
+{
+	pnx833x_machine_halt();
+}
diff --git a/arch/mips/nxp/pnx833x/common/setup.c b/arch/mips/nxp/pnx833x/common/setup.c
new file mode 100644
index 0000000..e51fbc4
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/common/setup.c
@@ -0,0 +1,64 @@
+/*
+ *  setup.c: Setup PNX833X Soc.
+ *
+ *  Copyright 2008 NXP Semiconductors
+ *	  Chris Steel <chris.steel@nxp.com>
+ *    Daniel Laird <daniel.j.laird@nxp.com>
+ *
+ *  Based on software written by:
+ *      Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <asm/reboot.h>
+#include <pnx833x.h>
+#include <gpio.h>
+
+extern void pnx833x_board_setup(void);
+extern void pnx833x_machine_restart(char *);
+extern void pnx833x_machine_halt(void);
+extern void pnx833x_machine_power_off(void);
+
+int __init plat_mem_setup(void)
+{
+	/* fake pci bus to avoid bounce buffers */
+	PCI_DMA_BUS_IS_PHYS = 1;
+
+	/* set mips clock to 320MHz */
+#if defined(CONFIG_SOC_PNX8335)
+	PNX8335_WRITEFIELD(0x17, CLOCK_PLL_CPU_CTL, FREQ);
+#endif
+	pnx833x_gpio_init();	/* so it will be ready in board_setup() */
+
+	pnx833x_board_setup();
+
+	_machine_restart = pnx833x_machine_restart;
+	_machine_halt = pnx833x_machine_halt;
+	pm_power_off = pnx833x_machine_power_off;
+
+	/* IO/MEM resources. */
+	set_io_port_base(KSEG1);
+	ioport_resource.start = 0;
+	ioport_resource.end = ~0;
+	iomem_resource.start = 0;
+	iomem_resource.end = ~0;
+
+	return 0;
+}
diff --git a/arch/mips/nxp/pnx833x/stb22x/Makefile b/arch/mips/nxp/pnx833x/stb22x/Makefile
new file mode 100644
index 0000000..f81c580
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/stb22x/Makefile
@@ -0,0 +1,3 @@
+lib-y := board.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/nxp/pnx833x/stb22x/board.c b/arch/mips/nxp/pnx833x/stb22x/board.c
new file mode 100644
index 0000000..90cc604
--- /dev/null
+++ b/arch/mips/nxp/pnx833x/stb22x/board.c
@@ -0,0 +1,133 @@
+/*
+ *  board.c: STB225 board support.
+ *
+ *  Copyright 2008 NXP Semiconductors
+ *	  Chris Steel <chris.steel@nxp.com>
+ *    Daniel Laird <daniel.j.laird@nxp.com>
+ *
+ *  Based on software written by:
+ *      Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/init.h>
+#include <asm/bootinfo.h>
+#include <linux/mm.h>
+#include <pnx833x.h>
+#include <gpio.h>
+
+/* endianess twiddlers */
+#define PNX8335_DEBUG0 0x4400
+#define PNX8335_DEBUG1 0x4404
+#define PNX8335_DEBUG2 0x4408
+#define PNX8335_DEBUG3 0x440c
+#define PNX8335_DEBUG4 0x4410
+#define PNX8335_DEBUG5 0x4414
+#define PNX8335_DEBUG6 0x4418
+#define PNX8335_DEBUG7 0x441c
+
+int prom_argc;
+char **prom_argv = 0, **prom_envp = 0;
+
+extern void prom_init_cmdline(void);
+extern char *prom_getenv(char *envname);
+
+const char *get_system_type(void)
+{
+	return "NXP STB22x";
+}
+
+static inline unsigned long env_or_default(char *env, unsigned long dfl)
+{
+	char *str = prom_getenv(env);
+	return str ? simple_strtol(str, 0, 0) : dfl;
+}
+
+void __init prom_init(void)
+{
+	unsigned long memsize;
+
+	prom_argc = fw_arg0;
+	prom_argv = (char **)fw_arg1;
+	prom_envp = (char **)fw_arg2;
+
+	prom_init_cmdline();
+
+	memsize = env_or_default("memsize", 0x02000000);
+	add_memory_region(0, memsize, BOOT_MEM_RAM);
+}
+
+void __init pnx833x_board_setup(void)
+{
+	pnx833x_gpio_select_function_alt(4);
+	pnx833x_gpio_select_output(4);
+	pnx833x_gpio_select_function_alt(5);
+	pnx833x_gpio_select_input(5);
+	pnx833x_gpio_select_function_alt(6);
+	pnx833x_gpio_select_input(6);
+	pnx833x_gpio_select_function_alt(7);
+	pnx833x_gpio_select_output(7);
+
+	pnx833x_gpio_select_function_alt(25);
+	pnx833x_gpio_select_function_alt(26);
+
+	pnx833x_gpio_select_function_alt(27);
+	pnx833x_gpio_select_function_alt(28);
+	pnx833x_gpio_select_function_alt(29);
+	pnx833x_gpio_select_function_alt(30);
+	pnx833x_gpio_select_function_alt(31);
+	pnx833x_gpio_select_function_alt(32);
+	pnx833x_gpio_select_function_alt(33);
+
+#if defined(CONFIG_MTD_NAND_PLATFORM) || defined(CONFIG_MTD_NAND_PLATFORM_MODULE)
+	/* Setup MIU for NAND access on CS0...
+	 *
+	 * (it seems that we must also configure CS1 for reliable operation,
+	 * otherwise the first read ID command will fail if it's read as 4 bytes
+	 * but pass if it's read as 1 word.)
+	 */
+
+	/* Setup MIU CS0 & CS1 timing */
+	PNX833X_MIU_SEL0 = 0;
+	PNX833X_MIU_SEL1 = 0;
+	PNX833X_MIU_SEL0_TIMING = 0x50003081;
+	PNX833X_MIU_SEL1_TIMING = 0x50003081;
+
+	/* Setup GPIO 00 for use as MIU CS1 (CS0 is not multiplexed, so does not need this) */
+	pnx833x_gpio_select_function_alt(0);
+
+	/* Setup GPIO 04 to input NAND read/busy signal */
+	pnx833x_gpio_select_function_io(4);
+	pnx833x_gpio_select_input(4);
+
+	/* Setup GPIO 05 to disable NAND write protect */
+	pnx833x_gpio_select_function_io(5);
+	pnx833x_gpio_select_output(5);
+	pnx833x_gpio_write(1, 5);
+
+#elif defined(CONFIG_MTD_CFI) || defined(CONFIG_MTD_CFI_MODULE)
+
+	/* Set up MIU for 16-bit NOR access on CS0 and CS1... */
+
+	/* Setup MIU CS0 & CS1 timing */
+	PNX833X_MIU_SEL0 = 1;
+	PNX833X_MIU_SEL1 = 1;
+	PNX833X_MIU_SEL0_TIMING = 0x6A08D082;
+	PNX833X_MIU_SEL1_TIMING = 0x6A08D082;
+
+	/* Setup GPIO 00 for use as MIU CS1 (CS0 is not multiplexed, so does not need this) */
+	pnx833x_gpio_select_function_alt(0);
+#endif
+}