ARM: ixp4xx: Move NPE and QMGR to drivers/soc

The Network Processing Engine and Queue Manager are
versatile firmware components used by several IXP4xx
drivers.

Drivers are relying on getting access to these components
using <mach/*> headers which does not work with
multiplatform. We need to find a better place for the
drivers to live.

Let's first move them to drivers/soc and the start to
refactor a bit by passing resources and moving headers.

This patch introduce static IRQ assignments but that
will be fixed by later patches in this series.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 0 insertions, 379 deletions

diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
deleted file mode 100644
index 2665347a2c6f..000000000000
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/*
- * 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 <mach/qmgr.h>
-
-#include "irqs.h"
-
-static struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
-static struct resource *mem_res;
-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_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 == IRQ_IXP4XX_QM1 ? 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 qmgr_init(void)
-{
-	int i, err;
-	irq_handler_t handler1, handler2;
-
-	/* This driver does not work with device tree */
-	if (of_have_populated_dt())
-		return -ENODEV;
-
-	mem_res = request_mem_region(IXP4XX_QMGR_BASE_PHYS,
-				     IXP4XX_QMGR_REGION_SIZE,
-				     "IXP4xx Queue Manager");
-	if (mem_res == NULL)
-		return -EBUSY;
-
-	/* 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 = request_irq(IRQ_IXP4XX_QM1, handler1, 0, "IXP4xx Queue Manager",
-			  NULL);
-	if (err) {
-		printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
-		       IRQ_IXP4XX_QM1, err);
-		goto error_irq;
-	}
-
-	err = request_irq(IRQ_IXP4XX_QM2, handler2, 0, "IXP4xx Queue Manager",
-			  NULL);
-	if (err) {
-		printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
-		       IRQ_IXP4XX_QM2, err);
-		goto error_irq2;
-	}
-
-	used_sram_bitmap[0] = 0xF; /* 4 first pages reserved for config */
-	spin_lock_init(&qmgr_lock);
-
-	printk(KERN_INFO "IXP4xx Queue Manager initialized.\n");
-	return 0;
-
-error_irq2:
-	free_irq(IRQ_IXP4XX_QM1, NULL);
-error_irq:
-	release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
-	return err;
-}
-
-static void qmgr_remove(void)
-{
-	free_irq(IRQ_IXP4XX_QM1, NULL);
-	free_irq(IRQ_IXP4XX_QM2, NULL);
-	synchronize_irq(IRQ_IXP4XX_QM1);
-	synchronize_irq(IRQ_IXP4XX_QM2);
-	release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
-}
-
-module_init(qmgr_init);
-module_exit(qmgr_remove);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Krzysztof Halasa");
-
-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);