[ARM] 3567/2: arm: base support for Hilscher netX

Patch from Sascha Hauer

This patch adds the base support for Hilscher's netX network
processors.

Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 193 insertions, 0 deletions

diff --git a/arch/arm/mach-netx/generic.c b/arch/arm/mach-netx/generic.c
new file mode 100644
index 000000000000..af0b13534cfd
--- /dev/null
+++ b/arch/arm/mach-netx/generic.c
@@ -0,0 +1,193 @@
+/*
+ * arch/arm/mach-netx/generic.c
+ *
+ * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <asm/hardware.h>
+#include <asm/mach/map.h>
+#include <asm/hardware/vic.h>
+#include <asm/io.h>
+#include <asm/arch/netx-regs.h>
+#include <asm/mach/irq.h>
+
+static struct map_desc netx_io_desc[] __initdata = {
+        {
+                .virtual        = NETX_IO_VIRT,
+                .pfn            = __phys_to_pfn(NETX_IO_PHYS),
+                .length         = NETX_IO_SIZE,
+                .type           = MT_DEVICE
+        }
+};
+
+void __init netx_map_io(void)
+{
+        iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc));
+}
+
+static struct resource netx_rtc_resources[] = {
+        [0] = {
+                .start  = 0x00101200,
+                .end    = 0x00101220,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device netx_rtc_device = {
+        .name           = "netx-rtc",
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(netx_rtc_resources),
+        .resource       = netx_rtc_resources,
+};
+
+static struct platform_device *devices[] __initdata = {
+        &netx_rtc_device,
+};
+
+#if 0
+#define DEBUG_IRQ(fmt...)       printk(fmt)
+#else
+#define DEBUG_IRQ(fmt...)       while (0) {}
+#endif
+
+static void
+netx_hif_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
+                        struct pt_regs *regs)
+{
+        unsigned int irq = NETX_IRQ_HIF_CHAINED(0);
+        unsigned int stat;
+
+        stat = ((readl(NETX_DPMAS_INT_EN) &
+                readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f;
+
+        desc = irq_desc + NETX_IRQ_HIF_CHAINED(0);
+
+        while (stat) {
+                if (stat & 1) {
+                        DEBUG_IRQ("handling irq %d\n", irq);
+                        desc_handle_irq(irq, desc, regs);
+                }
+                irq++;
+                desc++;
+                stat >>= 1;
+        }
+}
+
+static int
+netx_hif_irq_type(unsigned int _irq, unsigned int type)
+{
+        unsigned int val, irq;
+
+        val = readl(NETX_DPMAS_IF_CONF1);
+
+        irq = _irq - NETX_IRQ_HIF_CHAINED(0);
+
+        if (type & __IRQT_RISEDGE) {
+                DEBUG_IRQ("rising edges\n");
+                val |= (1 << 26) << irq;
+        }
+        if (type & __IRQT_FALEDGE) {
+                DEBUG_IRQ("falling edges\n");
+                val &= ~((1 << 26) << irq);
+        }
+        if (type & __IRQT_LOWLVL) {
+                DEBUG_IRQ("low level\n");
+                val &= ~((1 << 26) << irq);
+        }
+        if (type & __IRQT_HIGHLVL) {
+                DEBUG_IRQ("high level\n");
+                val |= (1 << 26) << irq;
+        }
+
+        writel(val, NETX_DPMAS_IF_CONF1);
+
+        return 0;
+}
+
+static void
+netx_hif_ack_irq(unsigned int _irq)
+{
+        unsigned int val, irq;
+
+        irq = _irq - NETX_IRQ_HIF_CHAINED(0);
+        writel((1 << 24) << irq, NETX_DPMAS_INT_STAT);
+
+        val = readl(NETX_DPMAS_INT_EN);
+        val &= ~((1 << 24) << irq);
+        writel(val, NETX_DPMAS_INT_EN);
+
+        DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
+}
+
+static void
+netx_hif_mask_irq(unsigned int _irq)
+{
+        unsigned int val, irq;
+
+        irq = _irq - NETX_IRQ_HIF_CHAINED(0);
+        val = readl(NETX_DPMAS_INT_EN);
+        val &= ~((1 << 24) << irq);
+        writel(val, NETX_DPMAS_INT_EN);
+        DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
+}
+
+static void
+netx_hif_unmask_irq(unsigned int _irq)
+{
+        unsigned int val, irq;
+
+        irq = _irq - NETX_IRQ_HIF_CHAINED(0);
+        val = readl(NETX_DPMAS_INT_EN);
+        val |= (1 << 24) << irq;
+        writel(val, NETX_DPMAS_INT_EN);
+        DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
+}
+
+static struct irqchip netx_hif_chip = {
+        .ack = netx_hif_ack_irq,
+        .mask = netx_hif_mask_irq,
+        .unmask = netx_hif_unmask_irq,
+        .set_type = netx_hif_irq_type,
+};
+
+void __init netx_init_irq(void)
+{
+        int irq;
+
+        vic_init(__io(io_p2v(NETX_PA_VIC)), 0, ~0);
+
+        for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) {
+                set_irq_chip(irq, &netx_hif_chip);
+                set_irq_handler(irq, do_level_IRQ);
+                set_irq_flags(irq, IRQF_VALID);
+        }
+
+        writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN);
+        set_irq_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler);
+}
+
+static int __init netx_init(void)
+{
+        return platform_add_devices(devices, ARRAY_SIZE(devices));
+}
+
+subsys_initcall(netx_init);
+