[PATCH 6/13] powerpc: Add arch/powerpc support for Marvell/mv64x60 hostbridge
Mark A. Greer
mgreer at mvista.com
Thu Apr 26 09:58:58 EST 2007
From: Dale Farnsworth <dale at farnsworth.org>
Signed-off-by: Dale Farnsworth <dale at farnsworth.org>
---
platforms/embedded6xx/Kconfig | 4
sysdev/Makefile | 1
sysdev/mv64x60.c | 343 ++++++++++++++++++++++++++++++++++++++++++
sysdev/mv64x60.h | 9 +
4 files changed, 357 insertions(+)
Index: linux-2.6-powerpc-df/arch/powerpc/sysdev/mv64x60.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-powerpc-df/arch/powerpc/sysdev/mv64x60.c 2007-04-17 12:48:22.000000000 -0700
@@ -0,0 +1,343 @@
+/*
+ * Common routines for the Marvell mv64360/mv64460 host bridges (Discovery)
+ *
+ * Author: Dale Farnsworth <dale at farnsworth.org>
+ *
+ * 2007 (c) MontaVista, Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/irq.h>
+#include <asm/machdep.h>
+
+#include "mv64x60.h"
+
+/* Interrupt Controller Interface Registers */
+#define MV64X60_IC_MAIN_CAUSE_LO 0x0004
+#define MV64X60_IC_MAIN_CAUSE_HI 0x000c
+#define MV64X60_IC_CPU0_INTR_MASK_LO 0x0014
+#define MV64X60_IC_CPU0_INTR_MASK_HI 0x001c
+#define MV64X60_IC_CPU0_SELECT_CAUSE 0x0024
+
+#define MV64X60_HIGH_GPP_GROUPS 0x0f000000
+#define MV64X60_SELECT_CAUSE_HIGH 0x40000000
+
+/* General Purpose Pins Controller Interface Registers */
+#define MV64x60_GPP_INTR_CAUSE 0x0008
+#define MV64x60_GPP_INTR_MASK 0x000c
+
+#define MV64x60_LEVEL1_LOW 0
+#define MV64x60_LEVEL1_HIGH 1
+#define MV64x60_LEVEL1_GPP 2
+
+#define MV64x60_LEVEL1_MASK 0x00000060
+#define MV64x60_LEVEL1_OFFSET 5
+
+#define MV64x60_LEVEL2_MASK 0x0000001f
+
+#define MV64x60_NUM_IRQS 96
+
+DEFINE_SPINLOCK(mv64x60_lock);
+
+static void __iomem *mv64x60_irq_reg_base;
+static void __iomem *mv64x60_gpp_reg_base;
+
+/*
+ * Interrupt Controller Handling
+ *
+ * The interrupt controller handles three groups of interrupts:
+ * main low: IRQ0-IRQ31
+ * main high: IRQ32-IRQ63
+ * gpp: IRQ64-IRQ95
+ *
+ * This code handles interrupts in two levels. Level 1 selects the
+ * interrupt group, and level 2 selects an IRQ within that group.
+ * Each group has its own irq_chip structure.
+ */
+
+static u32 mv64x60_cached_low_mask = 0;
+static u32 mv64x60_cached_high_mask = MV64X60_HIGH_GPP_GROUPS;
+static u32 mv64x60_cached_gpp_mask = 0;
+
+static struct irq_host *mv64x60_irq_host;
+
+/*
+ * mv64x60_chip_low functions
+ */
+
+static void mv64x60_mask_low(unsigned int virq)
+{
+ int level2 = irq_map[virq].hwirq & MV64x60_LEVEL2_MASK;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ mv64x60_cached_low_mask &= ~(1 << level2);
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_LO,
+ mv64x60_cached_low_mask);
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+ (void)in_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_LO);
+}
+
+static void mv64x60_unmask_low(unsigned int virq)
+{
+ int level2 = irq_map[virq].hwirq & MV64x60_LEVEL2_MASK;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ mv64x60_cached_low_mask |= 1 << level2;
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_LO,
+ mv64x60_cached_low_mask);
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+ (void)in_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_LO);
+}
+
+static struct irq_chip mv64x60_chip_low = {
+ .name = "mv64x60_low",
+ .mask = mv64x60_mask_low,
+ .mask_ack = mv64x60_mask_low,
+ .unmask = mv64x60_unmask_low,
+};
+
+/*
+ * mv64x60_chip_high functions
+ */
+
+static void mv64x60_mask_high(unsigned int virq)
+{
+ int level2 = irq_map[virq].hwirq & MV64x60_LEVEL2_MASK;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ mv64x60_cached_high_mask &= ~(1 << level2);
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_HI,
+ mv64x60_cached_high_mask);
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+ (void)in_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_HI);
+}
+
+static void mv64x60_unmask_high(unsigned int virq)
+{
+ int level2 = irq_map[virq].hwirq & MV64x60_LEVEL2_MASK;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ mv64x60_cached_high_mask |= 1 << level2;
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_HI,
+ mv64x60_cached_high_mask);
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+ (void)in_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_HI);
+}
+
+static struct irq_chip mv64x60_chip_high = {
+ .name = "mv64x60_high",
+ .mask = mv64x60_mask_high,
+ .mask_ack = mv64x60_mask_high,
+ .unmask = mv64x60_unmask_high,
+};
+
+/*
+ * mv64x60_chip_gpp functions
+ */
+
+static void mv64x60_mask_gpp(unsigned int virq)
+{
+ int level2 = irq_map[virq].hwirq & MV64x60_LEVEL2_MASK;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ mv64x60_cached_gpp_mask &= ~(1 << level2);
+ out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_MASK,
+ mv64x60_cached_gpp_mask);
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+ (void)in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_MASK);
+}
+
+static void mv64x60_mask_ack_gpp(unsigned int virq)
+{
+ int level2 = irq_map[virq].hwirq & MV64x60_LEVEL2_MASK;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ mv64x60_cached_gpp_mask &= ~(1 << level2);
+ out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_MASK,
+ mv64x60_cached_gpp_mask);
+ out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_CAUSE,
+ ~(1 << level2));
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+ (void)in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_CAUSE);
+}
+
+static void mv64x60_unmask_gpp(unsigned int virq)
+{
+ int level2 = irq_map[virq].hwirq & MV64x60_LEVEL2_MASK;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ mv64x60_cached_gpp_mask |= 1 << level2;
+ out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_MASK,
+ mv64x60_cached_gpp_mask);
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+ (void)in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_MASK);
+}
+
+static struct irq_chip mv64x60_chip_gpp = {
+ .name = "mv64x60_gpp",
+ .mask = mv64x60_mask_gpp,
+ .mask_ack = mv64x60_mask_ack_gpp,
+ .unmask = mv64x60_unmask_gpp,
+};
+
+/*
+ * mv64x60_host_ops functions
+ */
+
+static int mv64x60_host_match(struct irq_host *h, struct device_node *np)
+{
+ return mv64x60_irq_host->host_data == np;
+}
+
+static struct irq_chip *mv64x60_chips[] = {
+ [MV64x60_LEVEL1_LOW] = &mv64x60_chip_low,
+ [MV64x60_LEVEL1_HIGH] = &mv64x60_chip_high,
+ [MV64x60_LEVEL1_GPP] = &mv64x60_chip_gpp,
+};
+
+static int mv64x60_host_map(struct irq_host *h, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ int level1;
+
+ get_irq_desc(virq)->status |= IRQ_LEVEL;
+
+ level1 = (hwirq & MV64x60_LEVEL1_MASK) >> MV64x60_LEVEL1_OFFSET;
+ BUG_ON(level1 > MV64x60_LEVEL1_GPP);
+ set_irq_chip_and_handler(virq, mv64x60_chips[level1], handle_level_irq);
+
+ return 0;
+}
+
+static struct irq_host_ops mv64x60_host_ops = {
+ .match = mv64x60_host_match,
+ .map = mv64x60_host_map,
+};
+
+/*
+ * Global functions
+ */
+
+void __init mv64x60_init_irq(void)
+{
+ struct device_node *np;
+ phys_addr_t paddr;
+ unsigned int size;
+ const unsigned int *reg;
+ unsigned long flags;
+
+ np = of_find_compatible_node(NULL, "mv64x60-gpp", "mv64x60-gpp");
+ reg = of_get_property(np, "reg", &size);
+ paddr = of_translate_address(np, reg);
+ mv64x60_gpp_reg_base = ioremap(paddr, reg[1]);
+ of_node_put(np);
+
+ np = of_find_compatible_node(NULL, "mv64x60-pic", "mv64x60-pic");
+ reg = of_get_property(np, "reg", &size);
+ paddr = of_translate_address(np, reg);
+ of_node_put(np);
+ mv64x60_irq_reg_base = ioremap(paddr, reg[1]);
+
+ mv64x60_irq_host = irq_alloc_host(IRQ_HOST_MAP_LINEAR, MV64x60_NUM_IRQS,
+ &mv64x60_host_ops, MV64x60_NUM_IRQS);
+
+ mv64x60_irq_host->host_data = np;
+
+ spin_lock_irqsave(&mv64x60_lock, flags);
+ out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_MASK,
+ mv64x60_cached_gpp_mask);
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_LO,
+ mv64x60_cached_low_mask);
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_INTR_MASK_HI,
+ mv64x60_cached_high_mask);
+
+ out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_CAUSE, 0);
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_MAIN_CAUSE_LO, 0);
+ out_le32(mv64x60_irq_reg_base + MV64X60_IC_MAIN_CAUSE_HI, 0);
+ spin_unlock_irqrestore(&mv64x60_lock, flags);
+}
+
+unsigned int mv64x60_get_irq(void)
+{
+ u32 cause;
+ int level1;
+ irq_hw_number_t hwirq;
+ int virq = NO_IRQ;
+
+ cause = in_le32(mv64x60_irq_reg_base + MV64X60_IC_CPU0_SELECT_CAUSE);
+ if (cause & MV64X60_SELECT_CAUSE_HIGH) {
+ cause &= mv64x60_cached_high_mask;
+ level1 = MV64x60_LEVEL1_HIGH;
+ if (cause & MV64X60_HIGH_GPP_GROUPS) {
+ cause = in_le32(mv64x60_gpp_reg_base +
+ MV64x60_GPP_INTR_CAUSE);
+ cause &= mv64x60_cached_gpp_mask;
+ level1 = MV64x60_LEVEL1_GPP;
+ }
+ } else {
+ cause &= mv64x60_cached_low_mask;
+ level1 = MV64x60_LEVEL1_LOW;
+ }
+ if (cause) {
+ hwirq = (level1 << MV64x60_LEVEL1_OFFSET) | __ilog2(cause);
+ virq = irq_linear_revmap(mv64x60_irq_host, hwirq);
+ }
+
+ return virq;
+}
+
+/*
+ * The bootwrapper sets the coherency of the DMA windows according to
+ * the setting in the device tree. For the kernel, coherency is a
+ * compile-time configuration option. Fail if there is a mismatch.
+ */
+
+#ifdef CONFIG_NOT_COHERENT_CACHE
+#define KERNEL_COHERENCY 0
+#else
+#define KERNEL_COHERENCY 1
+#endif
+
+int __init mv64x60_verify_cache_coherency(void)
+{
+ struct device_node *np;
+ const void *prop;
+ int devtree_coherency;
+
+ np = of_find_node_by_path("/");
+ prop = of_get_property(np, "coherency-off", NULL);
+ of_node_put(np);
+
+ devtree_coherency = prop ? 0 : 1;
+
+ if (devtree_coherency != KERNEL_COHERENCY) {
+ printk(KERN_ERR
+ "kernel coherency:%s != device tree_coherency:%s\n",
+ KERNEL_COHERENCY ? "on" : "off",
+ devtree_coherency ? "on" : "off");
+ BUG();
+ }
+
+ return 0;
+}
+
+late_initcall(mv64x60_verify_cache_coherency);
Index: linux-2.6-powerpc-df/arch/powerpc/sysdev/mv64x60.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-powerpc-df/arch/powerpc/sysdev/mv64x60.h 2007-04-17 12:47:28.000000000 -0700
@@ -0,0 +1,9 @@
+#ifndef __MV64X60_H__
+#define __MV64X60_H__
+
+#include <linux/init.h>
+
+extern void __init mv64x60_init_irq(void);
+extern unsigned int mv64x60_get_irq(void);
+
+#endif /* __MV64X60_H__ */
Index: linux-2.6-powerpc-df/arch/powerpc/platforms/embedded6xx/Kconfig
===================================================================
--- linux-2.6-powerpc-df.orig/arch/powerpc/platforms/embedded6xx/Kconfig 2007-04-17 11:35:26.000000000 -0700
+++ linux-2.6-powerpc-df/arch/powerpc/platforms/embedded6xx/Kconfig 2007-04-17 12:47:27.000000000 -0700
@@ -38,6 +38,10 @@
select PPC_INDIRECT_PCI
default y
+config MV64X60
+ bool
+ select PPC_INDIRECT_PCI
+
config MPC10X_OPENPIC
bool
depends on LINKSTATION
Index: linux-2.6-powerpc-df/arch/powerpc/sysdev/Makefile
===================================================================
--- linux-2.6-powerpc-df.orig/arch/powerpc/sysdev/Makefile 2007-04-17 11:35:26.000000000 -0700
+++ linux-2.6-powerpc-df/arch/powerpc/sysdev/Makefile 2007-04-17 12:46:39.000000000 -0700
@@ -14,6 +14,7 @@
obj-$(CONFIG_FSL_PCIE) += fsl_pcie.o
obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o
obj-$(CONFIG_QUICC_ENGINE) += qe_lib/
+obj-$(CONFIG_MV64X60) += mv64x60.o
# contains only the suspend handler for time
obj-$(CONFIG_PM) += timer.o
More information about the Linuxppc-dev
mailing list