From a6a9fb857b5599b3cefef5576967389c1c43eb4c Mon Sep 17 00:00:00 2001
From: Krzysztof Hałasa <khc@pm.waw.pl>
Date: Fri, 20 Feb 2009 01:01:33 +0100
Subject: IXP4xx: Add support for the second half of the 64 hardware queues.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
---
 arch/arm/mach-ixp4xx/include/mach/qmgr.h | 65 +++++++++++++++++++++++++----
 arch/arm/mach-ixp4xx/ixp4xx_qmgr.c       | 71 ++++++++++++++++++++++----------
 2 files changed, 105 insertions(+), 31 deletions(-)

(limited to 'arch/arm/mach-ixp4xx')

diff --git a/arch/arm/mach-ixp4xx/include/mach/qmgr.h b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
index 0cbe6ceb67c5..32077e11f17a 100644
--- a/arch/arm/mach-ixp4xx/include/mach/qmgr.h
+++ b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
@@ -15,7 +15,7 @@
 #define DEBUG_QMGR	0
 
 #define HALF_QUEUES	32
-#define QUEUES		64	/* only 32 lower queues currently supported */
+#define QUEUES		64
 #define MAX_QUEUE_LENGTH 4	/* in dwords */
 
 #define QUEUE_STAT1_EMPTY		1 /* queue status bits */
@@ -110,48 +110,95 @@ static inline u32 qmgr_get_entry(unsigned int queue)
 	return val;
 }
 
-static inline int qmgr_get_stat1(unsigned int queue)
+static inline int __qmgr_get_stat1(unsigned int queue)
 {
 	extern struct qmgr_regs __iomem *qmgr_regs;
 	return (__raw_readl(&qmgr_regs->stat1[queue >> 3])
 		>> ((queue & 7) << 2)) & 0xF;
 }
 
-static inline int qmgr_get_stat2(unsigned int queue)
+static inline int __qmgr_get_stat2(unsigned int queue)
 {
 	extern struct qmgr_regs __iomem *qmgr_regs;
+	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.
+ */
 static inline int qmgr_stat_empty(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_EMPTY);
+	BUG_ON(queue >= HALF_QUEUES);
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_EMPTY;
 }
 
+/**
+ * qmgr_stat_empty() - checks if a hardware queue is nearly empty
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is nearly or completely empty.
+ */
 static inline int qmgr_stat_nearly_empty(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_EMPTY);
+	extern struct qmgr_regs __iomem *qmgr_regs;
+	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_empty() - checks if a hardware queue is nearly full
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is nearly or completely full.
+ */
 static inline int qmgr_stat_nearly_full(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_FULL);
+	BUG_ON(queue >= HALF_QUEUES);
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_FULL;
 }
 
+/**
+ * qmgr_stat_empty() - checks if a hardware queue is full
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is full.
+ */
 static inline int qmgr_stat_full(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_FULL);
+	extern struct qmgr_regs __iomem *qmgr_regs;
+	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_empty() - checks if a hardware queue experienced underflow
+ * @queue:	queue number
+ *
+ * Returns non-zero value if empty.
+ */
 static inline int qmgr_stat_underflow(unsigned int queue)
 {
-	return !!(qmgr_get_stat2(queue) & QUEUE_STAT2_UNDERFLOW);
+	return __qmgr_get_stat2(queue) & QUEUE_STAT2_UNDERFLOW;
 }
 
+/**
+ * qmgr_stat_empty() - checks if a hardware queue experienced overflow
+ * @queue:	queue number
+ *
+ * Returns non-zero value if empty.
+ */
 static inline int qmgr_stat_overflow(unsigned int queue)
 {
-	return !!(qmgr_get_stat2(queue) & QUEUE_STAT2_OVERFLOW);
+	return __qmgr_get_stat2(queue) & QUEUE_STAT2_OVERFLOW;
 }
 
 #endif
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index bfddc73d0a20..7531bfdb7b4e 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -18,8 +18,8 @@ struct qmgr_regs __iomem *qmgr_regs;
 static struct resource *mem_res;
 static spinlock_t qmgr_lock;
 static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
-static void (*irq_handlers[HALF_QUEUES])(void *pdev);
-static void *irq_pdevs[HALF_QUEUES];
+static void (*irq_handlers[QUEUES])(void *pdev);
+static void *irq_pdevs[QUEUES];
 
 #if DEBUG_QMGR
 char qmgr_queue_descs[QUEUES][32];
@@ -28,29 +28,38 @@ char qmgr_queue_descs[QUEUES][32];
 void qmgr_set_irq(unsigned int queue, int src,
 		  void (*handler)(void *pdev), void *pdev)
 {
-	u32 __iomem *reg = &qmgr_regs->irqsrc[queue / 8]; /* 8 queues / u32 */
-	int bit = (queue % 8) * 4; /* 3 bits + 1 reserved bit per queue */
 	unsigned long flags;
 
-	src &= 7;
 	spin_lock_irqsave(&qmgr_lock, flags);
-	__raw_writel((__raw_readl(reg) & ~(7 << bit)) | (src << bit), reg);
+	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(int irq, void *pdev)
+static irqreturn_t qmgr_irq(int irq, void *pdev)
 {
-	int i;
-	u32 val = __raw_readl(&qmgr_regs->irqstat[0]);
-	__raw_writel(val, &qmgr_regs->irqstat[0]); /* ACK */
+	int i, half = (irq == IRQ_IXP4XX_QM1 ? 0 : 1);
+	u32 val = __raw_readl(&qmgr_regs->irqstat[half]);
+	__raw_writel(val, &qmgr_regs->irqstat[half]); /* ACK */
 
 	for (i = 0; i < HALF_QUEUES; i++)
-		if (val & (1 << i))
-			irq_handlers[i](irq_pdevs[i]);
-
+		if (val & (1 << i)) {
+			int irq = half * HALF_QUEUES + i;
+			irq_handlers[irq](irq_pdevs[irq]);
+		}
 	return val ? IRQ_HANDLED : 0;
 }
 
@@ -58,21 +67,25 @@ static irqreturn_t qmgr_irq1(int irq, void *pdev)
 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[0]) | (1 << queue),
-		     &qmgr_regs->irqen[0]);
+	__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[0]) & ~(1 << queue),
-		     &qmgr_regs->irqen[0]);
-	__raw_writel(1 << queue, &qmgr_regs->irqstat[0]); /* clear */
+	__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);
 }
 
@@ -98,8 +111,7 @@ int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
 	u32 cfg, addr = 0, mask[4]; /* in 16-dwords */
 	int err;
 
-	if (queue >= HALF_QUEUES)
-		return -ERANGE;
+	BUG_ON(queue >= QUEUES);
 
 	if ((nearly_empty_watermark | nearly_full_watermark) & ~7)
 		return -EINVAL;
@@ -180,7 +192,7 @@ void qmgr_release_queue(unsigned int queue)
 {
 	u32 cfg, addr, mask[4];
 
-	BUG_ON(queue >= HALF_QUEUES); /* not in valid range */
+	BUG_ON(queue >= QUEUES); /* not in valid range */
 
 	spin_lock_irq(&qmgr_lock);
 	cfg = __raw_readl(&qmgr_regs->sram[queue]);
@@ -247,10 +259,13 @@ static int qmgr_init(void)
 		__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]);
 
-	err = request_irq(IRQ_IXP4XX_QM1, qmgr_irq1, 0,
+	err = request_irq(IRQ_IXP4XX_QM1, qmgr_irq, 0,
 			  "IXP4xx Queue Manager", NULL);
 	if (err) {
 		printk(KERN_ERR "qmgr: failed to request IRQ%i\n",
@@ -258,12 +273,22 @@ static int qmgr_init(void)
 		goto error_irq;
 	}
 
+	err = request_irq(IRQ_IXP4XX_QM2, qmgr_irq, 0,
+			  "IXP4xx Queue Manager", NULL);
+	if (err) {
+		printk(KERN_ERR "qmgr: failed to request IRQ%i\n",
+		       IRQ_IXP4XX_QM2);
+		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:
 	iounmap(qmgr_regs);
 error_map:
@@ -274,7 +299,9 @@ error_map:
 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);
 	iounmap(qmgr_regs);
 	release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
 }
-- 
cgit v1.2.3


From 8a4fe82497a52b6da45b5b3179cce7dd6a28a532 Mon Sep 17 00:00:00 2001
From: Krzysztof Hałasa <khc@pm.waw.pl>
Date: Tue, 28 Apr 2009 14:48:43 +0200
Subject: IXP42x: Identify Intel IXP425 rev. A0 processors.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
---
 arch/arm/mach-ixp4xx/include/mach/cpu.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'arch/arm/mach-ixp4xx')

diff --git a/arch/arm/mach-ixp4xx/include/mach/cpu.h b/arch/arm/mach-ixp4xx/include/mach/cpu.h
index def7773be67c..b2ef65db0e91 100644
--- a/arch/arm/mach-ixp4xx/include/mach/cpu.h
+++ b/arch/arm/mach-ixp4xx/include/mach/cpu.h
@@ -26,6 +26,8 @@
 #define IXP46X_PROCESSOR_ID_VALUE	0x69054200 /* including IXP455 */
 #define IXP46X_PROCESSOR_ID_MASK	0xfffffff0
 
+#define cpu_is_ixp42x_rev_a0() ((read_cpuid_id() & (IXP42X_PROCESSOR_ID_MASK | 0xF)) == \
+				IXP42X_PROCESSOR_ID_VALUE)
 #define cpu_is_ixp42x()	((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \
 			 IXP42X_PROCESSOR_ID_VALUE)
 #define cpu_is_ixp43x()	((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \
@@ -35,8 +37,11 @@
 
 static inline u32 ixp4xx_read_feature_bits(void)
 {
-	unsigned int val = ~*IXP4XX_EXP_CFG2;
+	u32 val = ~*IXP4XX_EXP_CFG2;
 
+	if (cpu_is_ixp42x_rev_a0())
+		return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP |
+					       IXP4XX_FEATURE_AES);
 	if (cpu_is_ixp42x())
 		return val & IXP42X_FEATURE_MASK;
 	if (cpu_is_ixp43x())
-- 
cgit v1.2.3


From 61a5ccc85a98f5eced89a3fda19b0ee708535c1b Mon Sep 17 00:00:00 2001
From: Krzysztof Hałasa <khc@pm.waw.pl>
Date: Tue, 28 Apr 2009 14:52:23 +0200
Subject: IXP42x: add NPE support for IXP425 rev. A0 processors.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
---
 arch/arm/mach-ixp4xx/ixp4xx_npe.c | 9 ---------
 1 file changed, 9 deletions(-)

(limited to 'arch/arm/mach-ixp4xx')

diff --git a/arch/arm/mach-ixp4xx/ixp4xx_npe.c b/arch/arm/mach-ixp4xx/ixp4xx_npe.c
index 7bb8e778e4b6..47ac69c7ec78 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_npe.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_npe.c
@@ -386,15 +386,6 @@ static int npe_reset(struct npe *npe)
 	/* reset the NPE */
 	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;	/* reset completed */
-		udelay(1);
-	}
-	if (i == MAX_RETRIES)
-		return -ETIMEDOUT;
-
 	/* deassert reset */
 	ixp4xx_write_feature_bits(val |
 				  (IXP4XX_FEATURE_RESET_NPEA << npe->id));
-- 
cgit v1.2.3


From d4c9e9fc97515588529e7fe48c7d5725292c6734 Mon Sep 17 00:00:00 2001
From: Krzysztof Hałasa <khc@pm.waw.pl>
Date: Sat, 23 May 2009 23:36:03 +0200
Subject: IXP42x: Add QMgr support for IXP425 rev. A0 processors.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
---
 arch/arm/mach-ixp4xx/ixp4xx_qmgr.c | 67 +++++++++++++++++++++++++++++++++-----
 1 file changed, 59 insertions(+), 8 deletions(-)

(limited to 'arch/arm/mach-ixp4xx')

diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index 7531bfdb7b4e..6e6dc4c78a10 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -49,6 +49,49 @@ void qmgr_set_irq(unsigned int queue, int src,
 }
 
 
+static irqreturn_t qmgr_irq1_a0(int irq, void *pdev)
+{
+	int i, ret = 0;
+
+	/* ACK - it may clear any bits so don't rely on it */
+	__raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[0]);
+
+	for (i = 0; i < HALF_QUEUES; i++) {
+		u32 src, stat;
+		if (!(qmgr_regs->irqen[0] & BIT(i)))
+			continue;
+		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;
+	for (i = 0; i < HALF_QUEUES; i++) {
+		if (!(req_bitmap & BIT(i)))
+			continue;
+		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);
@@ -236,6 +279,8 @@ void qmgr_release_queue(unsigned int queue)
 static int qmgr_init(void)
 {
 	int i, err;
+	irq_handler_t handler1, handler2;
+
 	mem_res = request_mem_region(IXP4XX_QMGR_BASE_PHYS,
 				     IXP4XX_QMGR_REGION_SIZE,
 				     "IXP4xx Queue Manager");
@@ -265,19 +310,25 @@ static int qmgr_init(void)
 	for (i = 0; i < QUEUES; i++)
 		__raw_writel(0, &qmgr_regs->sram[i]);
 
-	err = request_irq(IRQ_IXP4XX_QM1, qmgr_irq, 0,
-			  "IXP4xx Queue Manager", NULL);
+	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\n",
-		       IRQ_IXP4XX_QM1);
+		printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
+		       IRQ_IXP4XX_QM1, err);
 		goto error_irq;
 	}
 
-	err = request_irq(IRQ_IXP4XX_QM2, qmgr_irq, 0,
-			  "IXP4xx Queue Manager", NULL);
+	err = request_irq(IRQ_IXP4XX_QM2, handler2, 0, "IXP4xx Queue Manager",
+			  NULL);
 	if (err) {
-		printk(KERN_ERR "qmgr: failed to request IRQ%i\n",
-		       IRQ_IXP4XX_QM2);
+		printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
+		       IRQ_IXP4XX_QM2, err);
 		goto error_irq2;
 	}
 
-- 
cgit v1.2.3


From 0771c6939484d2ebe0ec28257c2570aecd9911e0 Mon Sep 17 00:00:00 2001
From: Krzysztof Hałasa <khc@pm.waw.pl>
Date: Tue, 28 Apr 2009 19:32:55 +0200
Subject: IXP42x: Use __fls() in QMgr interrupt handlers.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
---
 arch/arm/mach-ixp4xx/ixp4xx_qmgr.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

(limited to 'arch/arm/mach-ixp4xx')

diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index 6e6dc4c78a10..bfdbe4b5a3cc 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -52,14 +52,15 @@ void qmgr_set_irq(unsigned int queue, int src,
 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]);
 
-	for (i = 0; i < HALF_QUEUES; i++) {
-		u32 src, stat;
-		if (!(qmgr_regs->irqen[0] & BIT(i)))
-			continue;
+	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 */
@@ -82,9 +83,9 @@ static irqreturn_t qmgr_irq2_a0(int irq, void *pdev)
 	__raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[1]);
 
 	req_bitmap = qmgr_regs->irqen[1] & qmgr_regs->statne_h;
-	for (i = 0; i < HALF_QUEUES; i++) {
-		if (!(req_bitmap & BIT(i)))
-			continue;
+	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;
 	}
@@ -95,15 +96,19 @@ static irqreturn_t qmgr_irq2_a0(int irq, void *pdev)
 static irqreturn_t qmgr_irq(int irq, void *pdev)
 {
 	int i, half = (irq == IRQ_IXP4XX_QM1 ? 0 : 1);
-	u32 val = __raw_readl(&qmgr_regs->irqstat[half]);
-	__raw_writel(val, &qmgr_regs->irqstat[half]); /* ACK */
+	u32 req_bitmap = __raw_readl(&qmgr_regs->irqstat[half]);
 
-	for (i = 0; i < HALF_QUEUES; i++)
-		if (val & (1 << i)) {
-			int irq = half * HALF_QUEUES + i;
-			irq_handlers[irq](irq_pdevs[irq]);
-		}
-	return val ? IRQ_HANDLED : 0;
+	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;
 }
 
 
-- 
cgit v1.2.3


From 11c79740d3c03cb81f84e98cf2e2dbd8d9bb53cd Mon Sep 17 00:00:00 2001
From: Krzysztof Hałasa <khc@pm.waw.pl>
Date: Sat, 23 May 2009 23:58:30 +0200
Subject: IXP4xx: support for Goramo MultiLink router platform.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
---
 arch/arm/mach-ixp4xx/Kconfig      |   6 +
 arch/arm/mach-ixp4xx/Makefile     |   1 +
 arch/arm/mach-ixp4xx/goramo_mlr.c | 507 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 514 insertions(+)
 create mode 100644 arch/arm/mach-ixp4xx/goramo_mlr.c

(limited to 'arch/arm/mach-ixp4xx')

diff --git a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig
index 2c5a02b8520e..264f4d59f898 100644
--- a/arch/arm/mach-ixp4xx/Kconfig
+++ b/arch/arm/mach-ixp4xx/Kconfig
@@ -78,6 +78,12 @@ config MACH_IXDP465
 	  IXDP465 Development Platform (Also known as BMP).
 	  For more information on this platform, see <file:Documentation/arm/IXP4xx>.
 
+config MACH_GORAMO_MLR
+	bool "GORAMO Multi Link Router"
+	help
+	  Say 'Y' here if you want your kernel to support GORAMO
+	  MultiLink router.
+
 config MACH_KIXRP435
 	bool "KIXRP435"
 	help
diff --git a/arch/arm/mach-ixp4xx/Makefile b/arch/arm/mach-ixp4xx/Makefile
index 2e6bbf927a74..47d1f60d23fa 100644
--- a/arch/arm/mach-ixp4xx/Makefile
+++ b/arch/arm/mach-ixp4xx/Makefile
@@ -30,6 +30,7 @@ obj-$(CONFIG_MACH_DSMG600)      += dsmg600-setup.o
 obj-$(CONFIG_MACH_GATEWAY7001)	+= gateway7001-setup.o
 obj-$(CONFIG_MACH_WG302V2)	+= wg302v2-setup.o
 obj-$(CONFIG_MACH_FSG)		+= fsg-setup.o
+obj-$(CONFIG_MACH_GORAMO_MLR)	+= goramo_mlr.o
 
 obj-$(CONFIG_PCI)		+= $(obj-pci-$(CONFIG_PCI)) common-pci.o
 obj-$(CONFIG_IXP4XX_QMGR)	+= ixp4xx_qmgr.o
diff --git a/arch/arm/mach-ixp4xx/goramo_mlr.c b/arch/arm/mach-ixp4xx/goramo_mlr.c
new file mode 100644
index 000000000000..a733b8ff3cec
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/goramo_mlr.c
@@ -0,0 +1,507 @@
+/*
+ * Goramo MultiLink router platform code
+ * Copyright (C) 2006-2009 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/delay.h>
+#include <linux/hdlc.h>
+#include <linux/i2c-gpio.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/serial_8250.h>
+#include <asm/mach-types.h>
+#include <asm/system.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+#include <asm/mach/pci.h>
+
+#define xgpio_irq(n)		(IRQ_IXP4XX_GPIO ## n)
+#define gpio_irq(n)		xgpio_irq(n)
+
+#define SLOT_ETHA		0x0B	/* IDSEL = AD21 */
+#define SLOT_ETHB		0x0C	/* IDSEL = AD20 */
+#define SLOT_MPCI		0x0D	/* IDSEL = AD19 */
+#define SLOT_NEC		0x0E	/* IDSEL = AD18 */
+
+#define IRQ_ETHA		IRQ_IXP4XX_GPIO4
+#define IRQ_ETHB		IRQ_IXP4XX_GPIO5
+#define IRQ_NEC			IRQ_IXP4XX_GPIO3
+#define IRQ_MPCI		IRQ_IXP4XX_GPIO12
+
+/* GPIO lines */
+#define GPIO_SCL		0
+#define GPIO_SDA		1
+#define GPIO_STR		2
+#define GPIO_HSS0_DCD_N		6
+#define GPIO_HSS1_DCD_N		7
+#define GPIO_HSS0_CTS_N		10
+#define GPIO_HSS1_CTS_N		11
+#define GPIO_HSS1_RTS_N		13
+#define GPIO_HSS0_RTS_N		14
+
+/* Control outputs from 74HC4094 */
+#define CONTROL_HSS0_CLK_INT	0
+#define CONTROL_HSS1_CLK_INT	1
+#define CONTROL_HSS0_DTR_N	2
+#define CONTROL_HSS1_DTR_N	3
+#define CONTROL_EXT		4
+#define CONTROL_AUTO_RESET	5
+#define CONTROL_PCI_RESET_N	6
+#define CONTROL_EEPROM_WC_N	7
+
+/* offsets from start of flash ROM = 0x50000000 */
+#define CFG_ETH0_ADDRESS	0x40 /* 6 bytes */
+#define CFG_ETH1_ADDRESS	0x46 /* 6 bytes */
+#define CFG_REV			0x4C /* u32 */
+#define CFG_SDRAM_SIZE		0x50 /* u32 */
+#define CFG_SDRAM_CONF		0x54 /* u32 */
+#define CFG_SDRAM_MODE		0x58 /* u32 */
+#define CFG_SDRAM_REFRESH	0x5C /* u32 */
+
+#define CFG_HW_BITS		0x60 /* u32 */
+#define  CFG_HW_USB_PORTS	0x00000007 /* 0 = no NEC chip, 1-5 = ports # */
+#define  CFG_HW_HAS_PCI_SLOT	0x00000008
+#define  CFG_HW_HAS_ETH0	0x00000010
+#define  CFG_HW_HAS_ETH1	0x00000020
+#define  CFG_HW_HAS_HSS0	0x00000040
+#define  CFG_HW_HAS_HSS1	0x00000080
+#define  CFG_HW_HAS_UART0	0x00000100
+#define  CFG_HW_HAS_UART1	0x00000200
+#define  CFG_HW_HAS_EEPROM	0x00000400
+
+#define FLASH_CMD_READ_ARRAY	0xFF
+#define FLASH_CMD_READ_ID	0x90
+#define FLASH_SER_OFF		0x102 /* 0x81 in 16-bit mode */
+
+static u32 hw_bits = 0xFFFFFFFD;    /* assume all hardware present */;
+static u8 control_value;
+
+static void set_scl(u8 value)
+{
+	gpio_line_set(GPIO_SCL, !!value);
+	udelay(3);
+}
+
+static void set_sda(u8 value)
+{
+	gpio_line_set(GPIO_SDA, !!value);
+	udelay(3);
+}
+
+static void set_str(u8 value)
+{
+	gpio_line_set(GPIO_STR, !!value);
+	udelay(3);
+}
+
+static inline void set_control(int line, int value)
+{
+	if (value)
+		control_value |=  (1 << line);
+	else
+		control_value &= ~(1 << line);
+}
+
+
+static void output_control(void)
+{
+	int i;
+
+	gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
+	gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
+
+	for (i = 0; i < 8; i++) {
+		set_scl(0);
+		set_sda(control_value & (0x80 >> i)); /* MSB first */
+		set_scl(1);	/* active edge */
+	}
+
+	set_str(1);
+	set_str(0);
+
+	set_scl(0);
+	set_sda(1);		/* Be ready for START */
+	set_scl(1);
+}
+
+
+static void (*set_carrier_cb_tab[2])(void *pdev, int carrier);
+
+static int hss_set_clock(int port, unsigned int clock_type)
+{
+	int ctrl_int = port ? CONTROL_HSS1_CLK_INT : CONTROL_HSS0_CLK_INT;
+
+	switch (clock_type) {
+	case CLOCK_DEFAULT:
+	case CLOCK_EXT:
+		set_control(ctrl_int, 0);
+		output_control();
+		return CLOCK_EXT;
+
+	case CLOCK_INT:
+		set_control(ctrl_int, 1);
+		output_control();
+		return CLOCK_INT;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static irqreturn_t hss_dcd_irq(int irq, void *pdev)
+{
+	int i, port = (irq == gpio_irq(GPIO_HSS1_DCD_N));
+	gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
+	set_carrier_cb_tab[port](pdev, !i);
+	return IRQ_HANDLED;
+}
+
+
+static int hss_open(int port, void *pdev,
+		    void (*set_carrier_cb)(void *pdev, int carrier))
+{
+	int i, irq;
+
+	if (!port)
+		irq = gpio_irq(GPIO_HSS0_DCD_N);
+	else
+		irq = gpio_irq(GPIO_HSS1_DCD_N);
+
+	gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
+	set_carrier_cb(pdev, !i);
+
+	set_carrier_cb_tab[!!port] = set_carrier_cb;
+
+	if ((i = request_irq(irq, hss_dcd_irq, 0, "IXP4xx HSS", pdev)) != 0) {
+		printk(KERN_ERR "ixp4xx_hss: failed to request IRQ%i (%i)\n",
+		       irq, i);
+		return i;
+	}
+
+	set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 0);
+	output_control();
+	gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 0);
+	return 0;
+}
+
+static void hss_close(int port, void *pdev)
+{
+	free_irq(port ? gpio_irq(GPIO_HSS1_DCD_N) : gpio_irq(GPIO_HSS0_DCD_N),
+		 pdev);
+	set_carrier_cb_tab[!!port] = NULL; /* catch bugs */
+
+	set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 1);
+	output_control();
+	gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 1);
+}
+
+
+/* Flash memory */
+static struct flash_platform_data flash_data = {
+	.map_name	= "cfi_probe",
+	.width		= 2,
+};
+
+static struct resource flash_resource = {
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device device_flash = {
+	.name		= "IXP4XX-Flash",
+	.id		= 0,
+	.dev		= { .platform_data = &flash_data },
+	.num_resources	= 1,
+	.resource	= &flash_resource,
+};
+
+
+/* I^2C interface */
+static struct i2c_gpio_platform_data i2c_data = {
+	.sda_pin	= GPIO_SDA,
+	.scl_pin	= GPIO_SCL,
+};
+
+static struct platform_device device_i2c = {
+	.name		= "i2c-gpio",
+	.id		= 0,
+	.dev		= { .platform_data = &i2c_data },
+};
+
+
+/* IXP425 2 UART ports */
+static struct resource uart_resources[] = {
+	{
+		.start		= IXP4XX_UART1_BASE_PHYS,
+		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= IXP4XX_UART2_BASE_PHYS,
+		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
+		.flags		= IORESOURCE_MEM,
+	}
+};
+
+static struct plat_serial8250_port uart_data[] = {
+	{
+		.mapbase	= IXP4XX_UART1_BASE_PHYS,
+		.membase	= (char __iomem *)IXP4XX_UART1_BASE_VIRT +
+			REG_OFFSET,
+		.irq		= IRQ_IXP4XX_UART1,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= IXP4XX_UART_XTAL,
+	},
+	{
+		.mapbase	= IXP4XX_UART2_BASE_PHYS,
+		.membase	= (char __iomem *)IXP4XX_UART2_BASE_VIRT +
+			REG_OFFSET,
+		.irq		= IRQ_IXP4XX_UART2,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= IXP4XX_UART_XTAL,
+	},
+	{ },
+};
+
+static struct platform_device device_uarts = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev.platform_data	= uart_data,
+	.num_resources		= 2,
+	.resource		= uart_resources,
+};
+
+
+/* Built-in 10/100 Ethernet MAC interfaces */
+static struct eth_plat_info eth_plat[] = {
+	{
+		.phy		= 0,
+		.rxq		= 3,
+		.txreadyq	= 32,
+	}, {
+		.phy		= 1,
+		.rxq		= 4,
+		.txreadyq	= 33,
+	}
+};
+
+static struct platform_device device_eth_tab[] = {
+	{
+		.name			= "ixp4xx_eth",
+		.id			= IXP4XX_ETH_NPEB,
+		.dev.platform_data	= eth_plat,
+	}, {
+		.name			= "ixp4xx_eth",
+		.id			= IXP4XX_ETH_NPEC,
+		.dev.platform_data	= eth_plat + 1,
+	}
+};
+
+
+/* IXP425 2 synchronous serial ports */
+static struct hss_plat_info hss_plat[] = {
+	{
+		.set_clock	= hss_set_clock,
+		.open		= hss_open,
+		.close		= hss_close,
+		.txreadyq	= 34,
+	}, {
+		.set_clock	= hss_set_clock,
+		.open		= hss_open,
+		.close		= hss_close,
+		.txreadyq	= 35,
+	}
+};
+
+static struct platform_device device_hss_tab[] = {
+	{
+		.name			= "ixp4xx_hss",
+		.id			= 0,
+		.dev.platform_data	= hss_plat,
+	}, {
+		.name			= "ixp4xx_hss",
+		.id			= 1,
+		.dev.platform_data	= hss_plat + 1,
+	}
+};
+
+
+static struct platform_device *device_tab[6] __initdata = {
+	&device_flash,		/* index 0 */
+};
+
+static inline u8 __init flash_readb(u8 __iomem *flash, u32 addr)
+{
+#ifdef __ARMEB__
+	return __raw_readb(flash + addr);
+#else
+	return __raw_readb(flash + (addr ^ 3));
+#endif
+}
+
+static inline u16 __init flash_readw(u8 __iomem *flash, u32 addr)
+{
+#ifdef __ARMEB__
+	return __raw_readw(flash + addr);
+#else
+	return __raw_readw(flash + (addr ^ 2));
+#endif
+}
+
+static void __init gmlr_init(void)
+{
+	u8 __iomem *flash;
+	int i, devices = 1; /* flash */
+
+	ixp4xx_sys_init();
+
+	if ((flash = ioremap(IXP4XX_EXP_BUS_BASE_PHYS, 0x80)) == NULL)
+		printk(KERN_ERR "goramo-mlr: unable to access system"
+		       " configuration data\n");
+	else {
+		system_rev = __raw_readl(flash + CFG_REV);
+		hw_bits = __raw_readl(flash + CFG_HW_BITS);
+
+		for (i = 0; i < ETH_ALEN; i++) {
+			eth_plat[0].hwaddr[i] =
+				flash_readb(flash, CFG_ETH0_ADDRESS + i);
+			eth_plat[1].hwaddr[i] =
+				flash_readb(flash, CFG_ETH1_ADDRESS + i);
+		}
+
+		__raw_writew(FLASH_CMD_READ_ID, flash);
+		system_serial_high = flash_readw(flash, FLASH_SER_OFF);
+		system_serial_high <<= 16;
+		system_serial_high |= flash_readw(flash, FLASH_SER_OFF + 2);
+		system_serial_low = flash_readw(flash, FLASH_SER_OFF + 4);
+		system_serial_low <<= 16;
+		system_serial_low |= flash_readw(flash, FLASH_SER_OFF + 6);
+		__raw_writew(FLASH_CMD_READ_ARRAY, flash);
+
+		iounmap(flash);
+	}
+
+	switch (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1)) {
+	case CFG_HW_HAS_UART0:
+		memset(&uart_data[1], 0, sizeof(uart_data[1]));
+		device_uarts.num_resources = 1;
+		break;
+
+	case CFG_HW_HAS_UART1:
+		device_uarts.dev.platform_data = &uart_data[1];
+		device_uarts.resource = &uart_resources[1];
+		device_uarts.num_resources = 1;
+		break;
+	}
+	if (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1))
+		device_tab[devices++] = &device_uarts; /* max index 1 */
+
+	if (hw_bits & CFG_HW_HAS_ETH0)
+		device_tab[devices++] = &device_eth_tab[0]; /* max index 2 */
+	if (hw_bits & CFG_HW_HAS_ETH1)
+		device_tab[devices++] = &device_eth_tab[1]; /* max index 3 */
+
+	if (hw_bits & CFG_HW_HAS_HSS0)
+		device_tab[devices++] = &device_hss_tab[0]; /* max index 4 */
+	if (hw_bits & CFG_HW_HAS_HSS1)
+		device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */
+
+	if (hw_bits & CFG_HW_HAS_EEPROM)
+		device_tab[devices++] = &device_i2c; /* max index 6 */
+
+	gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
+	gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
+	gpio_line_config(GPIO_STR, IXP4XX_GPIO_OUT);
+	gpio_line_config(GPIO_HSS0_RTS_N, IXP4XX_GPIO_OUT);
+	gpio_line_config(GPIO_HSS1_RTS_N, IXP4XX_GPIO_OUT);
+	gpio_line_config(GPIO_HSS0_DCD_N, IXP4XX_GPIO_IN);
+	gpio_line_config(GPIO_HSS1_DCD_N, IXP4XX_GPIO_IN);
+	set_irq_type(gpio_irq(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
+	set_irq_type(gpio_irq(GPIO_HSS1_DCD_N), IRQ_TYPE_EDGE_BOTH);
+
+	set_control(CONTROL_HSS0_DTR_N, 1);
+	set_control(CONTROL_HSS1_DTR_N, 1);
+	set_control(CONTROL_EEPROM_WC_N, 1);
+	set_control(CONTROL_PCI_RESET_N, 1);
+	output_control();
+
+	msleep(1);	      /* Wait for PCI devices to initialize */
+
+	flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
+	flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
+
+	platform_add_devices(device_tab, devices);
+}
+
+
+#ifdef CONFIG_PCI
+static void __init gmlr_pci_preinit(void)
+{
+	set_irq_type(IRQ_ETHA, IRQ_TYPE_LEVEL_LOW);
+	set_irq_type(IRQ_ETHB, IRQ_TYPE_LEVEL_LOW);
+	set_irq_type(IRQ_NEC, IRQ_TYPE_LEVEL_LOW);
+	set_irq_type(IRQ_MPCI, IRQ_TYPE_LEVEL_LOW);
+	ixp4xx_pci_preinit();
+}
+
+static void __init gmlr_pci_postinit(void)
+{
+	if ((hw_bits & CFG_HW_USB_PORTS) >= 2 &&
+	    (hw_bits & CFG_HW_USB_PORTS) < 5) {
+		/* need to adjust number of USB ports on NEC chip */
+		u32 value, addr = BIT(32 - SLOT_NEC) | 0xE0;
+		if (!ixp4xx_pci_read(addr, NP_CMD_CONFIGREAD, &value)) {
+			value &= ~7;
+			value |= (hw_bits & CFG_HW_USB_PORTS);
+			ixp4xx_pci_write(addr, NP_CMD_CONFIGWRITE, value);
+		}
+	}
+}
+
+static int __init gmlr_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	switch(slot) {
+	case SLOT_ETHA:	return IRQ_ETHA;
+	case SLOT_ETHB:	return IRQ_ETHB;
+	case SLOT_NEC:	return IRQ_NEC;
+	default:	return IRQ_MPCI;
+	}
+}
+
+static struct hw_pci gmlr_hw_pci __initdata = {
+	.nr_controllers = 1,
+	.preinit	= gmlr_pci_preinit,
+	.postinit	= gmlr_pci_postinit,
+	.swizzle	= pci_std_swizzle,
+	.setup		= ixp4xx_setup,
+	.scan		= ixp4xx_scan_bus,
+	.map_irq	= gmlr_map_irq,
+};
+
+static int __init gmlr_pci_init(void)
+{
+	if (machine_is_goramo_mlr() &&
+	    (hw_bits & (CFG_HW_USB_PORTS | CFG_HW_HAS_PCI_SLOT)))
+		pci_common_init(&gmlr_hw_pci);
+	return 0;
+}
+
+subsys_initcall(gmlr_pci_init);
+#endif /* CONFIG_PCI */
+
+
+MACHINE_START(GORAMO_MLR, "MultiLink")
+	/* Maintainer: Krzysztof Halasa */
+	.phys_io	= IXP4XX_PERIPHERAL_BASE_PHYS,
+	.io_pg_offst	= ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
+	.map_io		= ixp4xx_map_io,
+	.init_irq	= ixp4xx_init_irq,
+	.timer		= &ixp4xx_timer,
+	.boot_params	= 0x0100,
+	.init_machine	= gmlr_init,
+MACHINE_END
-- 
cgit v1.2.3


From 9733bb8e9ce0078f55405ce470a62ec0a551fe99 Mon Sep 17 00:00:00 2001
From: Krzysztof Hałasa <khc@pm.waw.pl>
Date: Mon, 25 May 2009 13:25:34 +0200
Subject: IXP4xx: Change QMgr function names to qmgr_stat_*_watermark and clean
 the comments.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
---
 arch/arm/mach-ixp4xx/include/mach/qmgr.h | 22 +++++++++++-----------
 drivers/net/arm/ixp4xx_eth.c             | 13 ++++++-------
 drivers/net/wan/ixp4xx_hss.c             |  9 ++++-----
 3 files changed, 21 insertions(+), 23 deletions(-)

(limited to 'arch/arm/mach-ixp4xx')

diff --git a/arch/arm/mach-ixp4xx/include/mach/qmgr.h b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
index 32077e11f17a..9e7cad2d54cb 100644
--- a/arch/arm/mach-ixp4xx/include/mach/qmgr.h
+++ b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
@@ -138,12 +138,12 @@ static inline int qmgr_stat_empty(unsigned int queue)
 }
 
 /**
- * qmgr_stat_empty() - checks if a hardware queue is nearly 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 nearly or completely empty.
+ * Returns non-zero value if the queue is below low watermark.
  */
-static inline int qmgr_stat_nearly_empty(unsigned int queue)
+static inline int qmgr_stat_below_low_watermark(unsigned int queue)
 {
 	extern struct qmgr_regs __iomem *qmgr_regs;
 	if (queue >= HALF_QUEUES)
@@ -153,19 +153,19 @@ static inline int qmgr_stat_nearly_empty(unsigned int queue)
 }
 
 /**
- * qmgr_stat_empty() - checks if a hardware queue is nearly full
+ * qmgr_stat_above_high_watermark() - checks if a queue is above high watermark
  * @queue:	queue number
  *
- * Returns non-zero value if the queue is nearly or completely full.
+ * Returns non-zero value if the queue is above high watermark
  */
-static inline int qmgr_stat_nearly_full(unsigned int queue)
+static inline int qmgr_stat_above_high_watermark(unsigned int queue)
 {
 	BUG_ON(queue >= HALF_QUEUES);
 	return __qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_FULL;
 }
 
 /**
- * qmgr_stat_empty() - checks if a hardware queue is full
+ * qmgr_stat_full() - checks if a hardware queue is full
  * @queue:	queue number
  *
  * Returns non-zero value if the queue is full.
@@ -180,10 +180,10 @@ static inline int qmgr_stat_full(unsigned int queue)
 }
 
 /**
- * qmgr_stat_empty() - checks if a hardware queue experienced underflow
+ * qmgr_stat_underflow() - checks if a hardware queue experienced underflow
  * @queue:	queue number
  *
- * Returns non-zero value if empty.
+ * Returns non-zero value if the queue experienced underflow.
  */
 static inline int qmgr_stat_underflow(unsigned int queue)
 {
@@ -191,10 +191,10 @@ static inline int qmgr_stat_underflow(unsigned int queue)
 }
 
 /**
- * qmgr_stat_empty() - checks if a hardware queue experienced overflow
+ * qmgr_stat_overflow() - checks if a hardware queue experienced overflow
  * @queue:	queue number
  *
- * Returns non-zero value if empty.
+ * Returns non-zero value if the queue experienced overflow.
  */
 static inline int qmgr_stat_overflow(unsigned int queue)
 {
diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c
index 672c9626b9ca..b6d188115caf 100644
--- a/drivers/net/arm/ixp4xx_eth.c
+++ b/drivers/net/arm/ixp4xx_eth.c
@@ -513,8 +513,8 @@ static int eth_poll(struct napi_struct *napi, int budget)
 #endif
 			napi_complete(napi);
 			qmgr_enable_irq(rxq);
-			if (!qmgr_stat_nearly_empty(rxq) &&
-			    napi_reschedule(napi)) { /* really empty in fact */
+			if (!qmgr_stat_below_low_watermark(rxq) &&
+			    napi_reschedule(napi)) { /* not empty again */
 #if DEBUG_RX
 				printk(KERN_DEBUG "%s: eth_poll"
 				       " napi_reschedule successed\n",
@@ -631,10 +631,9 @@ static void eth_txdone_irq(void *unused)
 			port->tx_buff_tab[n_desc] = NULL;
 		}
 
-		/* really empty in fact */
-		start = qmgr_stat_nearly_empty(port->plat->txreadyq);
+		start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
 		queue_put_desc(port->plat->txreadyq, phys, desc);
-		if (start) {
+		if (start) { /* TX-ready queue was empty */
 #if DEBUG_TX
 			printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
 			       port->netdev->name);
@@ -710,14 +709,14 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
 	queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
 	dev->trans_start = jiffies;
 
-	if (qmgr_stat_nearly_empty(txreadyq)) { /* really empty in fact */
+	if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
 #if DEBUG_TX
 		printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
 #endif
 		netif_stop_queue(dev);
 		/* we could miss TX ready interrupt */
 		/* really empty in fact */
-		if (!qmgr_stat_nearly_empty(txreadyq)) {
+		if (!qmgr_stat_below_low_watermark(txreadyq)) {
 #if DEBUG_TX
 			printk(KERN_DEBUG "%s: eth_xmit ready again\n",
 			       dev->name);
diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c
index 1e56e58c6605..a6dc317083d3 100644
--- a/drivers/net/wan/ixp4xx_hss.c
+++ b/drivers/net/wan/ixp4xx_hss.c
@@ -790,11 +790,10 @@ static void hss_hdlc_txdone_irq(void *pdev)
 		free_buffer_irq(port->tx_buff_tab[n_desc]);
 		port->tx_buff_tab[n_desc] = NULL;
 
-		/* really empty in fact */
-		start = qmgr_stat_nearly_empty(port->plat->txreadyq);
+		start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
 		queue_put_desc(port->plat->txreadyq,
 			       tx_desc_phys(port, n_desc), desc);
-		if (start) {
+		if (start) { /* TX-ready queue was empty */
 #if DEBUG_TX
 			printk(KERN_DEBUG "%s: hss_hdlc_txdone_irq xmit"
 			       " ready\n", dev->name);
@@ -869,13 +868,13 @@ static int hss_hdlc_xmit(struct sk_buff *skb, struct net_device *dev)
 	queue_put_desc(queue_ids[port->id].tx, tx_desc_phys(port, n), desc);
 	dev->trans_start = jiffies;
 
-	if (qmgr_stat_nearly_empty(txreadyq)) { /* really empty in fact */
+	if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
 #if DEBUG_TX
 		printk(KERN_DEBUG "%s: hss_hdlc_xmit queue full\n", dev->name);
 #endif
 		netif_stop_queue(dev);
 		/* we could miss TX ready interrupt */
-		if (!qmgr_stat_nearly_empty(txreadyq)) {
+		if (!qmgr_stat_below_low_watermark(txreadyq)) {
 #if DEBUG_TX
 			printk(KERN_DEBUG "%s: hss_hdlc_xmit ready again\n",
 			       dev->name);
-- 
cgit v1.2.3