Merge tag 'ixp4xx-for-armsoc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into arm/soc

This modernizes the IXP4xx platform and adds initial Device Tree
Support. We migrate to MULTI_IRQ_HANDLER, bumps the IRQs to
offset 16, converts to SPARSE_IRQ, then we add proper subsystem
drivers in each subsystem for irqchip, GPIO and clocksource and
switch over to using these new drivers.

Next we modernize the NPE and QMGR drivers and push them down
into drivers/soc.

This has been tested on the IXP4xx NSLU2 and the Gateworks
GW2358-4.

* tag 'ixp4xx-for-armsoc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik: (31 commits)
  ARM: dts: Add queue manager and NPE to the IXP4xx DTSI
  soc: ixp4xx: qmgr: Add DT probe code
  soc: ixp4xx: qmgr: Add DT bindings for IXP4xx qmgr
  soc: ixp4xx: npe: Add DT probe code
  soc: ixp4xx: Add DT bindings for IXP4xx NPE
  soc: ixp4xx: qmgr: Pass resources
  soc: ixp4xx: Remove unused functions
  soc: ixp4xx: Uninline several functions
  soc: ixp4xx: npe: Pass addresses as resources
  ARM: ixp4xx: Turn the QMGR into a platform device
  ARM: ixp4xx: Turn the NPE into a platform device
  ARM: ixp4xx: Move IXP4xx QMGR and NPE headers
  ARM: ixp4xx: Move NPE and QMGR to drivers/soc
  ARM: dts: Add some initial IXP4xx device trees
  ARM: ixp4xx: Add device tree boot support
  ARM: ixp4xx: Add DT bindings
  gpio: ixp4xx: Add OF probing support
  gpio: ixp4xx: Add DT bindings
  clocksource/drivers/ixp4xx: Add OF initialization support
  clocksource/drivers/ixp4xx: Add DT bindings
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>

6 files changed, 1270 insertions, 0 deletions

diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index c07b4a85253f..ae9bf20b26fa 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -6,6 +6,7 @@ source "drivers/soc/atmel/Kconfig"
 source "drivers/soc/bcm/Kconfig"
 source "drivers/soc/fsl/Kconfig"
 source "drivers/soc/imx/Kconfig"
+source "drivers/soc/ixp4xx/Kconfig"
 source "drivers/soc/mediatek/Kconfig"
 source "drivers/soc/qcom/Kconfig"
 source "drivers/soc/renesas/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 90b686e586c6..c7c1a139ad8d 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_MACH_DOVE)		+= dove/
 obj-y				+= fsl/
 obj-$(CONFIG_ARCH_GEMINI)	+= gemini/
 obj-$(CONFIG_ARCH_MXC)		+= imx/
+obj-$(CONFIG_ARCH_IXP4XX)	+= ixp4xx/
 obj-$(CONFIG_SOC_XWAY)		+= lantiq/
 obj-y				+= mediatek/
 obj-y				+= amlogic/
diff --git a/drivers/soc/ixp4xx/Kconfig b/drivers/soc/ixp4xx/Kconfig
new file mode 100644
index 000000000000..de6becdc78a2
--- /dev/null
+++ b/drivers/soc/ixp4xx/Kconfig
@@ -0,0 +1,16 @@
+menu "IXP4xx SoC drivers"
+
+config IXP4XX_QMGR
+	tristate "IXP4xx Queue Manager support"
+	help
+	  This driver supports IXP4xx built-in hardware queue manager
+	  and is automatically selected by Ethernet and HSS drivers.
+
+config IXP4XX_NPE
+	tristate "IXP4xx Network Processor Engine support"
+	select FW_LOADER
+	help
+	  This driver supports IXP4xx built-in network coprocessors
+	  and is automatically selected by Ethernet and HSS drivers.
+
+endmenu
diff --git a/drivers/soc/ixp4xx/Makefile b/drivers/soc/ixp4xx/Makefile
new file mode 100644
index 000000000000..d20d99e6df65
--- /dev/null
+++ b/drivers/soc/ixp4xx/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_IXP4XX_QMGR)	+= ixp4xx-qmgr.o
+obj-$(CONFIG_IXP4XX_NPE)	+= ixp4xx-npe.o
diff --git a/drivers/soc/ixp4xx/ixp4xx-npe.c b/drivers/soc/ixp4xx/ixp4xx-npe.c
new file mode 100644
index 000000000000..15979d4376ab
--- /dev/null
+++ b/drivers/soc/ixp4xx/ixp4xx-npe.c
@@ -0,0 +1,762 @@
+/*
+ * Intel IXP4xx Network Processor Engine driver for Linux
+ *
+ * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * The code is based on publicly available information:
+ * - Intel IXP4xx Developer's Manual and other e-papers
+ * - Intel IXP400 Access Library Software (BSD license)
+ * - previous works by Christian Hohnstaedt <chohnstaedt@innominate.com>
+ *   Thanks, Christian.
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/soc/ixp4xx/npe.h>
+
+#define DEBUG_MSG			0
+#define DEBUG_FW			0
+
+#define NPE_COUNT			3
+#define MAX_RETRIES			1000	/* microseconds */
+#define NPE_42X_DATA_SIZE		0x800	/* in dwords */
+#define NPE_46X_DATA_SIZE		0x1000
+#define NPE_A_42X_INSTR_SIZE		0x1000
+#define NPE_B_AND_C_42X_INSTR_SIZE	0x800
+#define NPE_46X_INSTR_SIZE		0x1000
+#define REGS_SIZE			0x1000
+
+#define NPE_PHYS_REG			32
+
+#define FW_MAGIC			0xFEEDF00D
+#define FW_BLOCK_TYPE_INSTR		0x0
+#define FW_BLOCK_TYPE_DATA		0x1
+#define FW_BLOCK_TYPE_EOF		0xF
+
+/* NPE exec status (read) and command (write) */
+#define CMD_NPE_STEP			0x01
+#define CMD_NPE_START			0x02
+#define CMD_NPE_STOP			0x03
+#define CMD_NPE_CLR_PIPE		0x04
+#define CMD_CLR_PROFILE_CNT		0x0C
+#define CMD_RD_INS_MEM			0x10 /* instruction memory */
+#define CMD_WR_INS_MEM			0x11
+#define CMD_RD_DATA_MEM			0x12 /* data memory */
+#define CMD_WR_DATA_MEM			0x13
+#define CMD_RD_ECS_REG			0x14 /* exec access register */
+#define CMD_WR_ECS_REG			0x15
+
+#define STAT_RUN			0x80000000
+#define STAT_STOP			0x40000000
+#define STAT_CLEAR			0x20000000
+#define STAT_ECS_K			0x00800000 /* pipeline clean */
+
+#define NPE_STEVT			0x1B
+#define NPE_STARTPC			0x1C
+#define NPE_REGMAP			0x1E
+#define NPE_CINDEX			0x1F
+
+#define INSTR_WR_REG_SHORT		0x0000C000
+#define INSTR_WR_REG_BYTE		0x00004000
+#define INSTR_RD_FIFO			0x0F888220
+#define INSTR_RESET_MBOX		0x0FAC8210
+
+#define ECS_BG_CTXT_REG_0		0x00 /* Background Executing Context */
+#define ECS_BG_CTXT_REG_1		0x01 /*		Stack level */
+#define ECS_BG_CTXT_REG_2		0x02
+#define ECS_PRI_1_CTXT_REG_0		0x04 /* Priority 1 Executing Context */
+#define ECS_PRI_1_CTXT_REG_1		0x05 /*		Stack level */
+#define ECS_PRI_1_CTXT_REG_2		0x06
+#define ECS_PRI_2_CTXT_REG_0		0x08 /* Priority 2 Executing Context */
+#define ECS_PRI_2_CTXT_REG_1		0x09 /*		Stack level */
+#define ECS_PRI_2_CTXT_REG_2		0x0A
+#define ECS_DBG_CTXT_REG_0		0x0C /* Debug Executing Context */
+#define ECS_DBG_CTXT_REG_1		0x0D /*		Stack level */
+#define ECS_DBG_CTXT_REG_2		0x0E
+#define ECS_INSTRUCT_REG		0x11 /* NPE Instruction Register */
+
+#define ECS_REG_0_ACTIVE		0x80000000 /* all levels */
+#define ECS_REG_0_NEXTPC_MASK		0x1FFF0000 /* BG/PRI1/PRI2 levels */
+#define ECS_REG_0_LDUR_BITS		8
+#define ECS_REG_0_LDUR_MASK		0x00000700 /* all levels */
+#define ECS_REG_1_CCTXT_BITS		16
+#define ECS_REG_1_CCTXT_MASK		0x000F0000 /* all levels */
+#define ECS_REG_1_SELCTXT_BITS		0
+#define ECS_REG_1_SELCTXT_MASK		0x0000000F /* all levels */
+#define ECS_DBG_REG_2_IF		0x00100000 /* debug level */
+#define ECS_DBG_REG_2_IE		0x00080000 /* debug level */
+
+/* NPE watchpoint_fifo register bit */
+#define WFIFO_VALID			0x80000000
+
+/* NPE messaging_status register bit definitions */
+#define MSGSTAT_OFNE	0x00010000 /* OutFifoNotEmpty */
+#define MSGSTAT_IFNF	0x00020000 /* InFifoNotFull */
+#define MSGSTAT_OFNF	0x00040000 /* OutFifoNotFull */
+#define MSGSTAT_IFNE	0x00080000 /* InFifoNotEmpty */
+#define MSGSTAT_MBINT	0x00100000 /* Mailbox interrupt */
+#define MSGSTAT_IFINT	0x00200000 /* InFifo interrupt */
+#define MSGSTAT_OFINT	0x00400000 /* OutFifo interrupt */
+#define MSGSTAT_WFINT	0x00800000 /* WatchFifo interrupt */
+
+/* NPE messaging_control register bit definitions */
+#define MSGCTL_OUT_FIFO			0x00010000 /* enable output FIFO */
+#define MSGCTL_IN_FIFO			0x00020000 /* enable input FIFO */
+#define MSGCTL_OUT_FIFO_WRITE		0x01000000 /* enable FIFO + WRITE */
+#define MSGCTL_IN_FIFO_WRITE		0x02000000
+
+/* NPE mailbox_status value for reset */
+#define RESET_MBOX_STAT			0x0000F0F0
+
+#define NPE_A_FIRMWARE "NPE-A"
+#define NPE_B_FIRMWARE "NPE-B"
+#define NPE_C_FIRMWARE "NPE-C"
+
+const char *npe_names[] = { NPE_A_FIRMWARE, NPE_B_FIRMWARE, NPE_C_FIRMWARE };
+
+#define print_npe(pri, npe, fmt, ...)					\
+	printk(pri "%s: " fmt, npe_name(npe), ## __VA_ARGS__)
+
+#if DEBUG_MSG
+#define debug_msg(npe, fmt, ...)					\
+	print_npe(KERN_DEBUG, npe, fmt, ## __VA_ARGS__)
+#else
+#define debug_msg(npe, fmt, ...)
+#endif
+
+static struct {
+	u32 reg, val;
+} ecs_reset[] = {
+	{ ECS_BG_CTXT_REG_0,	0xA0000000 },
+	{ ECS_BG_CTXT_REG_1,	0x01000000 },
+	{ ECS_BG_CTXT_REG_2,	0x00008000 },
+	{ ECS_PRI_1_CTXT_REG_0,	0x20000080 },
+	{ ECS_PRI_1_CTXT_REG_1,	0x01000000 },
+	{ ECS_PRI_1_CTXT_REG_2,	0x00008000 },
+	{ ECS_PRI_2_CTXT_REG_0,	0x20000080 },
+	{ ECS_PRI_2_CTXT_REG_1,	0x01000000 },
+	{ ECS_PRI_2_CTXT_REG_2,	0x00008000 },
+	{ ECS_DBG_CTXT_REG_0,	0x20000000 },
+	{ ECS_DBG_CTXT_REG_1,	0x00000000 },
+	{ ECS_DBG_CTXT_REG_2,	0x001E0000 },
+	{ ECS_INSTRUCT_REG,	0x1003C00F },
+};
+
+static struct npe npe_tab[NPE_COUNT] = {
+	{
+		.id	= 0,
+	}, {
+		.id	= 1,
+	}, {
+		.id	= 2,
+	}
+};
+
+int npe_running(struct npe *npe)
+{
+	return (__raw_readl(&npe->regs->exec_status_cmd) & STAT_RUN) != 0;
+}
+
+static void npe_cmd_write(struct npe *npe, u32 addr, int cmd, u32 data)
+{
+	__raw_writel(data, &npe->regs->exec_data);
+	__raw_writel(addr, &npe->regs->exec_addr);
+	__raw_writel(cmd, &npe->regs->exec_status_cmd);
+}
+
+static u32 npe_cmd_read(struct npe *npe, u32 addr, int cmd)
+{
+	__raw_writel(addr, &npe->regs->exec_addr);
+	__raw_writel(cmd, &npe->regs->exec_status_cmd);
+	/* Iintroduce extra read cycles after issuing read command to NPE
+	   so that we read the register after the NPE has updated it.
+	   This is to overcome race condition between XScale and NPE */
+	__raw_readl(&npe->regs->exec_data);
+	__raw_readl(&npe->regs->exec_data);
+	return __raw_readl(&npe->regs->exec_data);
+}
+
+static void npe_clear_active(struct npe *npe, u32 reg)
+{
+	u32 val = npe_cmd_read(npe, reg, CMD_RD_ECS_REG);
+	npe_cmd_write(npe, reg, CMD_WR_ECS_REG, val & ~ECS_REG_0_ACTIVE);
+}
+
+static void npe_start(struct npe *npe)
+{
+	/* ensure only Background Context Stack Level is active */
+	npe_clear_active(npe, ECS_PRI_1_CTXT_REG_0);
+	npe_clear_active(npe, ECS_PRI_2_CTXT_REG_0);
+	npe_clear_active(npe, ECS_DBG_CTXT_REG_0);
+
+	__raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd);
+	__raw_writel(CMD_NPE_START, &npe->regs->exec_status_cmd);
+}
+
+static void npe_stop(struct npe *npe)
+{
+	__raw_writel(CMD_NPE_STOP, &npe->regs->exec_status_cmd);
+	__raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd); /*FIXME?*/
+}
+
+static int __must_check npe_debug_instr(struct npe *npe, u32 instr, u32 ctx,
+					u32 ldur)
+{
+	u32 wc;
+	int i;
+
+	/* set the Active bit, and the LDUR, in the debug level */
+	npe_cmd_write(npe, ECS_DBG_CTXT_REG_0, CMD_WR_ECS_REG,
+		      ECS_REG_0_ACTIVE | (ldur << ECS_REG_0_LDUR_BITS));
+
+	/* set CCTXT at ECS DEBUG L3 to specify in which context to execute
+	   the instruction, and set SELCTXT at ECS DEBUG Level to specify
+	   which context store to access.
+	   Debug ECS Level Reg 1 has form 0x000n000n, where n = context number
+	*/
+	npe_cmd_write(npe, ECS_DBG_CTXT_REG_1, CMD_WR_ECS_REG,
+		      (ctx << ECS_REG_1_CCTXT_BITS) |
+		      (ctx << ECS_REG_1_SELCTXT_BITS));
+
+	/* clear the pipeline */
+	__raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd);
+
+	/* load NPE instruction into the instruction register */
+	npe_cmd_write(npe, ECS_INSTRUCT_REG, CMD_WR_ECS_REG, instr);
+
+	/* we need this value later to wait for completion of NPE execution
+	   step */
+	wc = __raw_readl(&npe->regs->watch_count);
+
+	/* issue a Step One command via the Execution Control register */
+	__raw_writel(CMD_NPE_STEP, &npe->regs->exec_status_cmd);
+
+	/* Watch Count register increments when NPE completes an instruction */
+	for (i = 0; i < MAX_RETRIES; i++) {
+		if (wc != __raw_readl(&npe->regs->watch_count))
+			return 0;
+		udelay(1);
+	}
+
+	print_npe(KERN_ERR, npe, "reset: npe_debug_instr(): timeout\n");
+	return -ETIMEDOUT;
+}
+
+static int __must_check npe_logical_reg_write8(struct npe *npe, u32 addr,
+					       u8 val, u32 ctx)
+{
+	/* here we build the NPE assembler instruction: mov8 d0, #0 */
+	u32 instr = INSTR_WR_REG_BYTE |	/* OpCode */
+		addr << 9 |		/* base Operand */
+		(val & 0x1F) << 4 |	/* lower 5 bits to immediate data */
+		(val & ~0x1F) << (18 - 5);/* higher 3 bits to CoProc instr. */
+	return npe_debug_instr(npe, instr, ctx, 1); /* execute it */
+}
+
+static int __must_check npe_logical_reg_write16(struct npe *npe, u32 addr,
+						u16 val, u32 ctx)
+{
+	/* here we build the NPE assembler instruction: mov16 d0, #0 */
+	u32 instr = INSTR_WR_REG_SHORT | /* OpCode */
+		addr << 9 |		/* base Operand */
+		(val & 0x1F) << 4 |	/* lower 5 bits to immediate data */
+		(val & ~0x1F) << (18 - 5);/* higher 11 bits to CoProc instr. */
+	return npe_debug_instr(npe, instr, ctx, 1); /* execute it */
+}
+
+static int __must_check npe_logical_reg_write32(struct npe *npe, u32 addr,
+						u32 val, u32 ctx)
+{
+	/* write in 16 bit steps first the high and then the low value */
+	if (npe_logical_reg_write16(npe, addr, val >> 16, ctx))
+		return -ETIMEDOUT;
+	return npe_logical_reg_write16(npe, addr + 2, val & 0xFFFF, ctx);
+}
+
+static int npe_reset(struct npe *npe)
+{
+	u32 val, ctl, exec_count, ctx_reg2;
+	int i;
+
+	ctl = (__raw_readl(&npe->regs->messaging_control) | 0x3F000000) &
+		0x3F3FFFFF;
+
+	/* disable parity interrupt */
+	__raw_writel(ctl & 0x3F00FFFF, &npe->regs->messaging_control);
+
+	/* pre exec - debug instruction */
+	/* turn off the halt bit by clearing Execution Count register. */
+	exec_count = __raw_readl(&npe->regs->exec_count);
+	__raw_writel(0, &npe->regs->exec_count);
+	/* ensure that IF and IE are on (temporarily), so that we don't end up
+	   stepping forever */
+	ctx_reg2 = npe_cmd_read(npe, ECS_DBG_CTXT_REG_2, CMD_RD_ECS_REG);
+	npe_cmd_write(npe, ECS_DBG_CTXT_REG_2, CMD_WR_ECS_REG, ctx_reg2 |
+		      ECS_DBG_REG_2_IF | ECS_DBG_REG_2_IE);
+
+	/* clear the FIFOs */
+	while (__raw_readl(&npe->regs->watchpoint_fifo) & WFIFO_VALID)
+		;
+	while (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_OFNE)
+		/* read from the outFIFO until empty */
+		print_npe(KERN_DEBUG, npe, "npe_reset: read FIFO = 0x%X\n",
+			  __raw_readl(&npe->regs->in_out_fifo));
+
+	while (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNE)
+		/* step execution of the NPE intruction to read inFIFO using
+		   the Debug Executing Context stack */
+		if (npe_debug_instr(npe, INSTR_RD_FIFO, 0, 0))
+			return -ETIMEDOUT;
+
+	/* reset the mailbox reg from the XScale side */
+	__raw_writel(RESET_MBOX_STAT, &npe->regs->mailbox_status);
+	/* from NPE side */
+	if (npe_debug_instr(npe, INSTR_RESET_MBOX, 0, 0))
+		return -ETIMEDOUT;
+
+	/* Reset the physical registers in the NPE register file */
+	for (val = 0; val < NPE_PHYS_REG; val++) {
+		if (npe_logical_reg_write16(npe, NPE_REGMAP, val >> 1, 0))
+			return -ETIMEDOUT;
+		/* address is either 0 or 4 */
+		if (npe_logical_reg_write32(npe, (val & 1) * 4, 0, 0))
+			return -ETIMEDOUT;
+	}
+
+	/* Reset the context store = each context's Context Store registers */
+
+	/* Context 0 has no STARTPC. Instead, this value is used to set NextPC
+	   for Background ECS, to set where NPE starts executing code */
+	val = npe_cmd_read(npe, ECS_BG_CTXT_REG_0, CMD_RD_ECS_REG);
+	val &= ~ECS_REG_0_NEXTPC_MASK;
+	val |= (0 /* NextPC */ << 16) & ECS_REG_0_NEXTPC_MASK;
+	npe_cmd_write(npe, ECS_BG_CTXT_REG_0, CMD_WR_ECS_REG, val);
+
+	for (i = 0; i < 16; i++) {
+		if (i) {	/* Context 0 has no STEVT nor STARTPC */
+			/* STEVT = off, 0x80 */
+			if (npe_logical_reg_write8(npe, NPE_STEVT, 0x80, i))
+				return -ETIMEDOUT;
+			if (npe_logical_reg_write16(npe, NPE_STARTPC, 0, i))
+				return -ETIMEDOUT;
+		}
+		/* REGMAP = d0->p0, d8->p2, d16->p4 */
+		if (npe_logical_reg_write16(npe, NPE_REGMAP, 0x820, i))
+			return -ETIMEDOUT;
+		if (npe_logical_reg_write8(npe, NPE_CINDEX, 0, i))
+			return -ETIMEDOUT;
+	}
+
+	/* post exec */
+	/* clear active bit in debug level */
+	npe_cmd_write(npe, ECS_DBG_CTXT_REG_0, CMD_WR_ECS_REG, 0);
+	/* clear the pipeline */
+	__raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd);
+	/* restore previous values */
+	__raw_writel(exec_count, &npe->regs->exec_count);
+	npe_cmd_write(npe, ECS_DBG_CTXT_REG_2, CMD_WR_ECS_REG, ctx_reg2);
+
+	/* write reset values to Execution Context Stack registers */
+	for (val = 0; val < ARRAY_SIZE(ecs_reset); val++)
+		npe_cmd_write(npe, ecs_reset[val].reg, CMD_WR_ECS_REG,
+			      ecs_reset[val].val);
+
+	/* clear the profile counter */
+	__raw_writel(CMD_CLR_PROFILE_CNT, &npe->regs->exec_status_cmd);
+
+	__raw_writel(0, &npe->regs->exec_count);
+	__raw_writel(0, &npe->regs->action_points[0]);
+	__raw_writel(0, &npe->regs->action_points[1]);
+	__raw_writel(0, &npe->regs->action_points[2]);
+	__raw_writel(0, &npe->regs->action_points[3]);
+	__raw_writel(0, &npe->regs->watch_count);
+
+	val = ixp4xx_read_feature_bits();
+	/* reset the NPE */
+	ixp4xx_write_feature_bits(val &
+				  ~(IXP4XX_FEATURE_RESET_NPEA << npe->id));
+	/* deassert reset */
+	ixp4xx_write_feature_bits(val |
+				  (IXP4XX_FEATURE_RESET_NPEA << npe->id));
+	for (i = 0; i < MAX_RETRIES; i++) {
+		if (ixp4xx_read_feature_bits() &
+		    (IXP4XX_FEATURE_RESET_NPEA << npe->id))
+			break;	/* NPE is back alive */
+		udelay(1);
+	}
+	if (i == MAX_RETRIES)
+		return -ETIMEDOUT;
+
+	npe_stop(npe);
+
+	/* restore NPE configuration bus Control Register - parity settings */
+	__raw_writel(ctl, &npe->regs->messaging_control);
+	return 0;
+}
+
+
+int npe_send_message(struct npe *npe, const void *msg, const char *what)
+{
+	const u32 *send = msg;
+	int cycles = 0;
+
+	debug_msg(npe, "Trying to send message %s [%08X:%08X]\n",
+		  what, send[0], send[1]);
+
+	if (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNE) {
+		debug_msg(npe, "NPE input FIFO not empty\n");
+		return -EIO;
+	}
+
+	__raw_writel(send[0], &npe->regs->in_out_fifo);
+
+	if (!(__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNF)) {
+		debug_msg(npe, "NPE input FIFO full\n");
+		return -EIO;
+	}
+
+	__raw_writel(send[1], &npe->regs->in_out_fifo);
+
+	while ((cycles < MAX_RETRIES) &&
+	       (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNE)) {
+		udelay(1);
+		cycles++;
+	}
+
+	if (cycles == MAX_RETRIES) {
+		debug_msg(npe, "Timeout sending message\n");
+		return -ETIMEDOUT;
+	}
+
+#if DEBUG_MSG > 1
+	debug_msg(npe, "Sending a message took %i cycles\n", cycles);
+#endif
+	return 0;
+}
+
+int npe_recv_message(struct npe *npe, void *msg, const char *what)
+{
+	u32 *recv = msg;
+	int cycles = 0, cnt = 0;
+
+	debug_msg(npe, "Trying to receive message %s\n", what);
+
+	while (cycles < MAX_RETRIES) {
+		if (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_OFNE) {
+			recv[cnt++] = __raw_readl(&npe->regs->in_out_fifo);
+			if (cnt == 2)
+				break;
+		} else {
+			udelay(1);
+			cycles++;
+		}
+	}
+
+	switch(cnt) {
+	case 1:
+		debug_msg(npe, "Received [%08X]\n", recv[0]);
+		break;
+	case 2:
+		debug_msg(npe, "Received [%08X:%08X]\n", recv[0], recv[1]);
+		break;
+	}
+
+	if (cycles == MAX_RETRIES) {
+		debug_msg(npe, "Timeout waiting for message\n");
+		return -ETIMEDOUT;
+	}
+
+#if DEBUG_MSG > 1
+	debug_msg(npe, "Receiving a message took %i cycles\n", cycles);
+#endif
+	return 0;
+}
+
+int npe_send_recv_message(struct npe *npe, void *msg, const char *what)
+{
+	int result;
+	u32 *send = msg, recv[2];
+
+	if ((result = npe_send_message(npe, msg, what)) != 0)
+		return result;
+	if ((result = npe_recv_message(npe, recv, what)) != 0)
+		return result;
+
+	if ((recv[0] != send[0]) || (recv[1] != send[1])) {
+		debug_msg(npe, "Message %s: unexpected message received\n",
+			  what);
+		return -EIO;
+	}
+	return 0;
+}
+
+
+int npe_load_firmware(struct npe *npe, const char *name, struct device *dev)
+{
+	const struct firmware *fw_entry;
+
+	struct dl_block {
+		u32 type;
+		u32 offset;
+	} *blk;
+
+	struct dl_image {
+		u32 magic;
+		u32 id;
+		u32 size;
+		union {
+			u32 data[0];
+			struct dl_block blocks[0];
+		};
+	} *image;
+
+	struct dl_codeblock {
+		u32 npe_addr;
+		u32 size;
+		u32 data[0];
+	} *cb;
+
+	int i, j, err, data_size, instr_size, blocks, table_end;
+	u32 cmd;
+
+	if ((err = request_firmware(&fw_entry, name, dev)) != 0)
+		return err;
+
+	err = -EINVAL;
+	if (fw_entry->size < sizeof(struct dl_image)) {
+		print_npe(KERN_ERR, npe, "incomplete firmware file\n");
+		goto err;
+	}
+	image = (struct dl_image*)fw_entry->data;
+
+#if DEBUG_FW
+	print_npe(KERN_DEBUG, npe, "firmware: %08X %08X %08X (0x%X bytes)\n",
+		  image->magic, image->id, image->size, image->size * 4);
+#endif
+
+	if (image->magic == swab32(FW_MAGIC)) { /* swapped file */
+		image->id = swab32(image->id);
+		image->size = swab32(image->size);
+	} else if (image->magic != FW_MAGIC) {
+		print_npe(KERN_ERR, npe, "bad firmware file magic: 0x%X\n",
+			  image->magic);
+		goto err;
+	}
+	if ((image->size * 4 + sizeof(struct dl_image)) != fw_entry->size) {
+		print_npe(KERN_ERR, npe,
+			  "inconsistent size of firmware file\n");
+		goto err;
+	}
+	if (((image->id >> 24) & 0xF /* NPE ID */) != npe->id) {
+		print_npe(KERN_ERR, npe, "firmware file NPE ID mismatch\n");
+		goto err;
+	}
+	if (image->magic == swab32(FW_MAGIC))
+		for (i = 0; i < image->size; i++)
+			image->data[i] = swab32(image->data[i]);
+
+	if (cpu_is_ixp42x() && ((image->id >> 28) & 0xF /* device ID */)) {
+		print_npe(KERN_INFO, npe, "IXP43x/IXP46x firmware ignored on "
+			  "IXP42x\n");
+		goto err;
+	}
+
+	if (npe_running(npe)) {
+		print_npe(KERN_INFO, npe, "unable to load firmware, NPE is "
+			  "already running\n");
+		err = -EBUSY;
+		goto err;
+	}
+#if 0
+	npe_stop(npe);
+	npe_reset(npe);
+#endif
+
+	print_npe(KERN_INFO, npe, "firmware functionality 0x%X, "
+		  "revision 0x%X:%X\n", (image->id >> 16) & 0xFF,
+		  (image->id >> 8) & 0xFF, image->id & 0xFF);
+
+	if (cpu_is_ixp42x()) {
+		if (!npe->id)
+			instr_size = NPE_A_42X_INSTR_SIZE;
+		else
+			instr_size = NPE_B_AND_C_42X_INSTR_SIZE;
+		data_size = NPE_42X_DATA_SIZE;
+	} else {
+		instr_size = NPE_46X_INSTR_SIZE;
+		data_size = NPE_46X_DATA_SIZE;
+	}
+
+	for (blocks = 0; blocks * sizeof(struct dl_block) / 4 < image->size;
+	     blocks++)
+		if (image->blocks[blocks].type == FW_BLOCK_TYPE_EOF)
+			break;
+	if (blocks * sizeof(struct dl_block) / 4 >= image->size) {
+		print_npe(KERN_INFO, npe, "firmware EOF block marker not "
+			  "found\n");
+		goto err;
+	}
+
+#if DEBUG_FW
+	print_npe(KERN_DEBUG, npe, "%i firmware blocks found\n", blocks);
+#endif
+
+	table_end = blocks * sizeof(struct dl_block) / 4 + 1 /* EOF marker */;
+	for (i = 0, blk = image->blocks; i < blocks; i++, blk++) {
+		if (blk->offset > image->size - sizeof(struct dl_codeblock) / 4
+		    || blk->offset < table_end) {
+			print_npe(KERN_INFO, npe, "invalid offset 0x%X of "
+				  "firmware block #%i\n", blk->offset, i);
+			goto err;
+		}
+
+		cb = (struct dl_codeblock*)&image->data[blk->offset];
+		if (blk->type == FW_BLOCK_TYPE_INSTR) {
+			if (cb->npe_addr + cb->size > instr_size)
+				goto too_big;
+			cmd = CMD_WR_INS_MEM;
+		} else if (blk->type == FW_BLOCK_TYPE_DATA) {
+			if (cb->npe_addr + cb->size > data_size)
+				goto too_big;
+			cmd = CMD_WR_DATA_MEM;
+		} else {
+			print_npe(KERN_INFO, npe, "invalid firmware block #%i "
+				  "type 0x%X\n", i, blk->type);
+			goto err;
+		}
+		if (blk->offset + sizeof(*cb) / 4 + cb->size > image->size) {
+			print_npe(KERN_INFO, npe, "firmware block #%i doesn't "
+				  "fit in firmware image: type %c, start 0x%X,"
+				  " length 0x%X\n", i,
+				  blk->type == FW_BLOCK_TYPE_INSTR ? 'I' : 'D',
+				  cb->npe_addr, cb->size);
+			goto err;
+		}
+
+		for (j = 0; j < cb->size; j++)
+			npe_cmd_write(npe, cb->npe_addr + j, cmd, cb->data[j]);
+	}
+
+	npe_start(npe);
+	if (!npe_running(npe))
+		print_npe(KERN_ERR, npe, "unable to start\n");
+	release_firmware(fw_entry);
+	return 0;
+
+too_big:
+	print_npe(KERN_INFO, npe, "firmware block #%i doesn't fit in NPE "
+		  "memory: type %c, start 0x%X, length 0x%X\n", i,
+		  blk->type == FW_BLOCK_TYPE_INSTR ? 'I' : 'D',
+		  cb->npe_addr, cb->size);
+err:
+	release_firmware(fw_entry);
+	return err;
+}
+
+
+struct npe *npe_request(unsigned id)
+{
+	if (id < NPE_COUNT)
+		if (npe_tab[id].valid)
+			if (try_module_get(THIS_MODULE))
+				return &npe_tab[id];
+	return NULL;
+}
+
+void npe_release(struct npe *npe)
+{
+	module_put(THIS_MODULE);
+}
+
+static int ixp4xx_npe_probe(struct platform_device *pdev)
+{
+	int i, found = 0;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+
+	for (i = 0; i < NPE_COUNT; i++) {
+		struct npe *npe = &npe_tab[i];
+
+		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
+		if (!res)
+			return -ENODEV;
+
+		if (!(ixp4xx_read_feature_bits() &
+		      (IXP4XX_FEATURE_RESET_NPEA << i))) {
+			dev_info(dev, "NPE%d at 0x%08x-0x%08x not available\n",
+				 i, res->start, res->end);
+			continue; /* NPE already disabled or not present */
+		}
+		npe->regs = devm_ioremap_resource(dev, res);
+		if (!npe->regs)
+			return -ENOMEM;
+
+		if (npe_reset(npe)) {
+			dev_info(dev, "NPE%d at 0x%08x-0x%08x does not reset\n",
+				 i, res->start, res->end);
+			continue;
+		}
+		npe->valid = 1;
+		dev_info(dev, "NPE%d at 0x%08x-0x%08x registered\n",
+			 i, res->start, res->end);
+		found++;
+	}
+
+	if (!found)
+		return -ENODEV;
+	return 0;
+}
+
+static int ixp4xx_npe_remove(struct platform_device *pdev)
+{
+	int i;
+
+	for (i = 0; i < NPE_COUNT; i++)
+		if (npe_tab[i].regs) {
+			npe_reset(&npe_tab[i]);
+		}
+
+	return 0;
+}
+
+static const struct of_device_id ixp4xx_npe_of_match[] = {
+	{
+		.compatible = "intel,ixp4xx-network-processing-engine",
+        },
+	{},
+};
+
+static struct platform_driver ixp4xx_npe_driver = {
+	.driver = {
+		.name           = "ixp4xx-npe",
+		.of_match_table = of_match_ptr(ixp4xx_npe_of_match),
+	},
+	.probe = ixp4xx_npe_probe,
+	.remove = ixp4xx_npe_remove,
+};
+module_platform_driver(ixp4xx_npe_driver);
+
+MODULE_AUTHOR("Krzysztof Halasa");
+MODULE_LICENSE("GPL v2");
+MODULE_FIRMWARE(NPE_A_FIRMWARE);
+MODULE_FIRMWARE(NPE_B_FIRMWARE);
+MODULE_FIRMWARE(NPE_C_FIRMWARE);
+
+EXPORT_SYMBOL(npe_names);
+EXPORT_SYMBOL(npe_running);
+EXPORT_SYMBOL(npe_request);
+EXPORT_SYMBOL(npe_release);
+EXPORT_SYMBOL(npe_load_firmware);
+EXPORT_SYMBOL(npe_send_message);
+EXPORT_SYMBOL(npe_recv_message);
+EXPORT_SYMBOL(npe_send_recv_message);
diff --git a/drivers/soc/ixp4xx/ixp4xx-qmgr.c b/drivers/soc/ixp4xx/ixp4xx-qmgr.c
new file mode 100644
index 000000000000..13a8a13c9b01
--- /dev/null
+++ b/drivers/soc/ixp4xx/ixp4xx-qmgr.c
@@ -0,0 +1,488 @@
+/*
+ * Intel IXP4xx Queue Manager driver for Linux
+ *
+ * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/soc/ixp4xx/qmgr.h>
+
+static struct qmgr_regs __iomem *qmgr_regs;
+static int qmgr_irq_1;
+static int qmgr_irq_2;
+static spinlock_t qmgr_lock;
+static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
+static void (*irq_handlers[QUEUES])(void *pdev);
+static void *irq_pdevs[QUEUES];
+
+#if DEBUG_QMGR
+char qmgr_queue_descs[QUEUES][32];
+#endif
+
+void qmgr_put_entry(unsigned int queue, u32 val)
+{
+#if DEBUG_QMGR
+	BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
+
+	printk(KERN_DEBUG "Queue %s(%i) put %X\n",
+	       qmgr_queue_descs[queue], queue, val);
+#endif
+	__raw_writel(val, &qmgr_regs->acc[queue][0]);
+}
+
+u32 qmgr_get_entry(unsigned int queue)
+{
+	u32 val;
+	val = __raw_readl(&qmgr_regs->acc[queue][0]);
+#if DEBUG_QMGR
+	BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
+
+	printk(KERN_DEBUG "Queue %s(%i) get %X\n",
+	       qmgr_queue_descs[queue], queue, val);
+#endif
+	return val;
+}
+
+static int __qmgr_get_stat1(unsigned int queue)
+{
+	return (__raw_readl(&qmgr_regs->stat1[queue >> 3])
+		>> ((queue & 7) << 2)) & 0xF;
+}
+
+static int __qmgr_get_stat2(unsigned int queue)
+{
+	BUG_ON(queue >= HALF_QUEUES);
+	return (__raw_readl(&qmgr_regs->stat2[queue >> 4])
+		>> ((queue & 0xF) << 1)) & 0x3;
+}
+
+/**
+ * qmgr_stat_empty() - checks if a hardware queue is empty
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is empty.
+ */
+int qmgr_stat_empty(unsigned int queue)
+{
+	BUG_ON(queue >= HALF_QUEUES);
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_EMPTY;
+}
+
+/**
+ * qmgr_stat_below_low_watermark() - checks if a queue is below low watermark
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is below low watermark.
+ */
+int qmgr_stat_below_low_watermark(unsigned int queue)
+{
+	if (queue >= HALF_QUEUES)
+		return (__raw_readl(&qmgr_regs->statne_h) >>
+			(queue - HALF_QUEUES)) & 0x01;
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_EMPTY;
+}
+
+/**
+ * qmgr_stat_full() - checks if a hardware queue is full
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is full.
+ */
+int qmgr_stat_full(unsigned int queue)
+{
+	if (queue >= HALF_QUEUES)
+		return (__raw_readl(&qmgr_regs->statf_h) >>
+			(queue - HALF_QUEUES)) & 0x01;
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_FULL;
+}
+
+/**
+ * qmgr_stat_overflow() - checks if a hardware queue experienced overflow
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue experienced overflow.
+ */
+int qmgr_stat_overflow(unsigned int queue)
+{
+	return __qmgr_get_stat2(queue) & QUEUE_STAT2_OVERFLOW;
+}
+
+void qmgr_set_irq(unsigned int queue, int src,
+		  void (*handler)(void *pdev), void *pdev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&qmgr_lock, flags);
+	if (queue < HALF_QUEUES) {
+		u32 __iomem *reg;
+		int bit;
+		BUG_ON(src > QUEUE_IRQ_SRC_NOT_FULL);
+		reg = &qmgr_regs->irqsrc[queue >> 3]; /* 8 queues per u32 */
+		bit = (queue % 8) * 4; /* 3 bits + 1 reserved bit per queue */
+		__raw_writel((__raw_readl(reg) & ~(7 << bit)) | (src << bit),
+			     reg);
+	} else
+		/* IRQ source for queues 32-63 is fixed */
+		BUG_ON(src != QUEUE_IRQ_SRC_NOT_NEARLY_EMPTY);
+
+	irq_handlers[queue] = handler;
+	irq_pdevs[queue] = pdev;
+	spin_unlock_irqrestore(&qmgr_lock, flags);
+}
+
+
+static irqreturn_t qmgr_irq1_a0(int irq, void *pdev)
+{
+	int i, ret = 0;
+	u32 en_bitmap, src, stat;
+
+	/* ACK - it may clear any bits so don't rely on it */
+	__raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[0]);
+
+	en_bitmap = qmgr_regs->irqen[0];
+	while (en_bitmap) {
+		i = __fls(en_bitmap); /* number of the last "low" queue */
+		en_bitmap &= ~BIT(i);
+		src = qmgr_regs->irqsrc[i >> 3];
+		stat = qmgr_regs->stat1[i >> 3];
+		if (src & 4) /* the IRQ condition is inverted */
+			stat = ~stat;
+		if (stat & BIT(src & 3)) {
+			irq_handlers[i](irq_pdevs[i]);
+			ret = IRQ_HANDLED;
+		}
+	}
+	return ret;
+}
+
+
+static irqreturn_t qmgr_irq2_a0(int irq, void *pdev)
+{
+	int i, ret = 0;
+	u32 req_bitmap;
+
+	/* ACK - it may clear any bits so don't rely on it */
+	__raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[1]);
+
+	req_bitmap = qmgr_regs->irqen[1] & qmgr_regs->statne_h;
+	while (req_bitmap) {
+		i = __fls(req_bitmap); /* number of the last "high" queue */
+		req_bitmap &= ~BIT(i);
+		irq_handlers[HALF_QUEUES + i](irq_pdevs[HALF_QUEUES + i]);
+		ret = IRQ_HANDLED;
+	}
+	return ret;
+}
+
+
+static irqreturn_t qmgr_irq(int irq, void *pdev)
+{
+	int i, half = (irq == qmgr_irq_1 ? 0 : 1);
+	u32 req_bitmap = __raw_readl(&qmgr_regs->irqstat[half]);
+
+	if (!req_bitmap)
+		return 0;
+	__raw_writel(req_bitmap, &qmgr_regs->irqstat[half]); /* ACK */
+
+	while (req_bitmap) {
+		i = __fls(req_bitmap); /* number of the last queue */
+		req_bitmap &= ~BIT(i);
+		i += half * HALF_QUEUES;
+		irq_handlers[i](irq_pdevs[i]);
+	}
+	return IRQ_HANDLED;
+}
+
+
+void qmgr_enable_irq(unsigned int queue)
+{
+	unsigned long flags;
+	int half = queue / 32;
+	u32 mask = 1 << (queue & (HALF_QUEUES - 1));
+
+	spin_lock_irqsave(&qmgr_lock, flags);
+	__raw_writel(__raw_readl(&qmgr_regs->irqen[half]) | mask,
+		     &qmgr_regs->irqen[half]);
+	spin_unlock_irqrestore(&qmgr_lock, flags);
+}
+
+void qmgr_disable_irq(unsigned int queue)
+{
+	unsigned long flags;
+	int half = queue / 32;
+	u32 mask = 1 << (queue & (HALF_QUEUES - 1));
+
+	spin_lock_irqsave(&qmgr_lock, flags);
+	__raw_writel(__raw_readl(&qmgr_regs->irqen[half]) & ~mask,
+		     &qmgr_regs->irqen[half]);
+	__raw_writel(mask, &qmgr_regs->irqstat[half]); /* clear */
+	spin_unlock_irqrestore(&qmgr_lock, flags);
+}
+
+static inline void shift_mask(u32 *mask)
+{
+	mask[3] = mask[3] << 1 | mask[2] >> 31;
+	mask[2] = mask[2] << 1 | mask[1] >> 31;
+	mask[1] = mask[1] << 1 | mask[0] >> 31;
+	mask[0] <<= 1;
+}
+
+#if DEBUG_QMGR
+int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
+		       unsigned int nearly_empty_watermark,
+		       unsigned int nearly_full_watermark,
+		       const char *desc_format, const char* name)
+#else
+int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
+			 unsigned int nearly_empty_watermark,
+			 unsigned int nearly_full_watermark)
+#endif
+{
+	u32 cfg, addr = 0, mask[4]; /* in 16-dwords */
+	int err;
+
+	BUG_ON(queue >= QUEUES);
+
+	if ((nearly_empty_watermark | nearly_full_watermark) & ~7)
+		return -EINVAL;
+
+	switch (len) {
+	case  16:
+		cfg = 0 << 24;
+		mask[0] = 0x1;
+		break;
+	case  32:
+		cfg = 1 << 24;
+		mask[0] = 0x3;
+		break;
+	case  64:
+		cfg = 2 << 24;
+		mask[0] = 0xF;
+		break;
+	case 128:
+		cfg = 3 << 24;
+		mask[0] = 0xFF;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	cfg |= nearly_empty_watermark << 26;
+	cfg |= nearly_full_watermark << 29;
+	len /= 16;		/* in 16-dwords: 1, 2, 4 or 8 */
+	mask[1] = mask[2] = mask[3] = 0;
+
+	if (!try_module_get(THIS_MODULE))
+		return -ENODEV;
+
+	spin_lock_irq(&qmgr_lock);
+	if (__raw_readl(&qmgr_regs->sram[queue])) {
+		err = -EBUSY;
+		goto err;
+	}
+
+	while (1) {
+		if (!(used_sram_bitmap[0] & mask[0]) &&
+		    !(used_sram_bitmap[1] & mask[1]) &&
+		    !(used_sram_bitmap[2] & mask[2]) &&
+		    !(used_sram_bitmap[3] & mask[3]))
+			break; /* found free space */
+
+		addr++;
+		shift_mask(mask);
+		if (addr + len > ARRAY_SIZE(qmgr_regs->sram)) {
+			printk(KERN_ERR "qmgr: no free SRAM space for"
+			       " queue %i\n", queue);
+			err = -ENOMEM;
+			goto err;
+		}
+	}
+
+	used_sram_bitmap[0] |= mask[0];
+	used_sram_bitmap[1] |= mask[1];
+	used_sram_bitmap[2] |= mask[2];
+	used_sram_bitmap[3] |= mask[3];
+	__raw_writel(cfg | (addr << 14), &qmgr_regs->sram[queue]);
+#if DEBUG_QMGR
+	snprintf(qmgr_queue_descs[queue], sizeof(qmgr_queue_descs[0]),
+		 desc_format, name);
+	printk(KERN_DEBUG "qmgr: requested queue %s(%i) addr = 0x%02X\n",
+	       qmgr_queue_descs[queue], queue, addr);
+#endif
+	spin_unlock_irq(&qmgr_lock);
+	return 0;
+
+err:
+	spin_unlock_irq(&qmgr_lock);
+	module_put(THIS_MODULE);
+	return err;
+}
+
+void qmgr_release_queue(unsigned int queue)
+{
+	u32 cfg, addr, mask[4];
+
+	BUG_ON(queue >= QUEUES); /* not in valid range */
+
+	spin_lock_irq(&qmgr_lock);
+	cfg = __raw_readl(&qmgr_regs->sram[queue]);
+	addr = (cfg >> 14) & 0xFF;
+
+	BUG_ON(!addr);		/* not requested */
+
+	switch ((cfg >> 24) & 3) {
+	case 0: mask[0] = 0x1; break;
+	case 1: mask[0] = 0x3; break;
+	case 2: mask[0] = 0xF; break;
+	case 3: mask[0] = 0xFF; break;
+	}
+
+	mask[1] = mask[2] = mask[3] = 0;
+
+	while (addr--)
+		shift_mask(mask);
+
+#if DEBUG_QMGR
+	printk(KERN_DEBUG "qmgr: releasing queue %s(%i)\n",
+	       qmgr_queue_descs[queue], queue);
+	qmgr_queue_descs[queue][0] = '\x0';
+#endif
+
+	while ((addr = qmgr_get_entry(queue)))
+		printk(KERN_ERR "qmgr: released queue %i not empty: 0x%08X\n",
+		       queue, addr);
+
+	__raw_writel(0, &qmgr_regs->sram[queue]);
+
+	used_sram_bitmap[0] &= ~mask[0];
+	used_sram_bitmap[1] &= ~mask[1];
+	used_sram_bitmap[2] &= ~mask[2];
+	used_sram_bitmap[3] &= ~mask[3];
+	irq_handlers[queue] = NULL; /* catch IRQ bugs */
+	spin_unlock_irq(&qmgr_lock);
+
+	module_put(THIS_MODULE);
+}
+
+static int ixp4xx_qmgr_probe(struct platform_device *pdev)
+{
+	int i, err;
+	irq_handler_t handler1, handler2;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	int irq1, irq2;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+	qmgr_regs = devm_ioremap_resource(dev, res);
+	if (!qmgr_regs)
+		return -ENOMEM;
+
+	irq1 = platform_get_irq(pdev, 0);
+	if (irq1 <= 0)
+		return irq1 ? irq1 : -EINVAL;
+	qmgr_irq_1 = irq1;
+	irq2 = platform_get_irq(pdev, 1);
+	if (irq2 <= 0)
+		return irq2 ? irq2 : -EINVAL;
+	qmgr_irq_2 = irq2;
+
+	/* reset qmgr registers */
+	for (i = 0; i < 4; i++) {
+		__raw_writel(0x33333333, &qmgr_regs->stat1[i]);
+		__raw_writel(0, &qmgr_regs->irqsrc[i]);
+	}
+	for (i = 0; i < 2; i++) {
+		__raw_writel(0, &qmgr_regs->stat2[i]);
+		__raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[i]); /* clear */
+		__raw_writel(0, &qmgr_regs->irqen[i]);
+	}
+
+	__raw_writel(0xFFFFFFFF, &qmgr_regs->statne_h);
+	__raw_writel(0, &qmgr_regs->statf_h);
+
+	for (i = 0; i < QUEUES; i++)
+		__raw_writel(0, &qmgr_regs->sram[i]);
+
+	if (cpu_is_ixp42x_rev_a0()) {
+		handler1 = qmgr_irq1_a0;
+		handler2 = qmgr_irq2_a0;
+	} else
+		handler1 = handler2 = qmgr_irq;
+
+	err = devm_request_irq(dev, irq1, handler1, 0, "IXP4xx Queue Manager",
+			       NULL);
+	if (err) {
+		dev_err(dev, "failed to request IRQ%i (%i)\n",
+			irq1, err);
+		return err;
+	}
+
+	err = devm_request_irq(dev, irq2, handler2, 0, "IXP4xx Queue Manager",
+			       NULL);
+	if (err) {
+		dev_err(dev, "failed to request IRQ%i (%i)\n",
+			irq2, err);
+		return err;
+	}
+
+	used_sram_bitmap[0] = 0xF; /* 4 first pages reserved for config */
+	spin_lock_init(&qmgr_lock);
+
+	dev_info(dev, "IXP4xx Queue Manager initialized.\n");
+	return 0;
+}
+
+static int ixp4xx_qmgr_remove(struct platform_device *pdev)
+{
+	synchronize_irq(qmgr_irq_1);
+	synchronize_irq(qmgr_irq_2);
+	return 0;
+}
+
+static const struct of_device_id ixp4xx_qmgr_of_match[] = {
+	{
+		.compatible = "intel,ixp4xx-ahb-queue-manager",
+        },
+	{},
+};
+
+static struct platform_driver ixp4xx_qmgr_driver = {
+	.driver = {
+		.name           = "ixp4xx-qmgr",
+		.of_match_table = of_match_ptr(ixp4xx_qmgr_of_match),
+	},
+	.probe = ixp4xx_qmgr_probe,
+	.remove = ixp4xx_qmgr_remove,
+};
+module_platform_driver(ixp4xx_qmgr_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Krzysztof Halasa");
+
+EXPORT_SYMBOL(qmgr_put_entry);
+EXPORT_SYMBOL(qmgr_get_entry);
+EXPORT_SYMBOL(qmgr_stat_empty);
+EXPORT_SYMBOL(qmgr_stat_below_low_watermark);
+EXPORT_SYMBOL(qmgr_stat_full);
+EXPORT_SYMBOL(qmgr_stat_overflow);
+EXPORT_SYMBOL(qmgr_set_irq);
+EXPORT_SYMBOL(qmgr_enable_irq);
+EXPORT_SYMBOL(qmgr_disable_irq);
+#if DEBUG_QMGR
+EXPORT_SYMBOL(qmgr_queue_descs);
+EXPORT_SYMBOL(qmgr_request_queue);
+#else
+EXPORT_SYMBOL(__qmgr_request_queue);
+#endif
+EXPORT_SYMBOL(qmgr_release_queue);