[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>
This commit is contained in:
Sascha Hauer
committed by
Russell King
Russell King
szülő
3095faf529
commit
bb6d8c8828
11
arch/arm/mach-netx/Makefile
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11
arch/arm/mach-netx/Makefile
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@@ -0,0 +1,11 @@
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#
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# Makefile for the linux kernel.
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#
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# Note! Dependencies are done automagically by 'make dep', which also
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# removes any old dependencies. DON'T put your own dependencies here
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# unless it's something special (ie not a .c file).
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# Object file lists.
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obj-y += time.o generic.o
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2
arch/arm/mach-netx/Makefile.boot
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2
arch/arm/mach-netx/Makefile.boot
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@@ -0,0 +1,2 @@
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zreladdr-y := 0x80008000
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193
arch/arm/mach-netx/generic.c
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193
arch/arm/mach-netx/generic.c
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/*
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* arch/arm/mach-netx/generic.c
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*
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* Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <asm/hardware.h>
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#include <asm/mach/map.h>
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#include <asm/hardware/vic.h>
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#include <asm/io.h>
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#include <asm/arch/netx-regs.h>
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#include <asm/mach/irq.h>
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static struct map_desc netx_io_desc[] __initdata = {
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{
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.virtual = NETX_IO_VIRT,
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.pfn = __phys_to_pfn(NETX_IO_PHYS),
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.length = NETX_IO_SIZE,
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.type = MT_DEVICE
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}
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};
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void __init netx_map_io(void)
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{
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iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc));
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}
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static struct resource netx_rtc_resources[] = {
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[0] = {
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.start = 0x00101200,
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.end = 0x00101220,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device netx_rtc_device = {
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.name = "netx-rtc",
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.id = 0,
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.num_resources = ARRAY_SIZE(netx_rtc_resources),
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.resource = netx_rtc_resources,
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};
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static struct platform_device *devices[] __initdata = {
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&netx_rtc_device,
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};
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#if 0
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#define DEBUG_IRQ(fmt...) printk(fmt)
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#else
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#define DEBUG_IRQ(fmt...) while (0) {}
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#endif
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static void
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netx_hif_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
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struct pt_regs *regs)
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{
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unsigned int irq = NETX_IRQ_HIF_CHAINED(0);
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unsigned int stat;
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stat = ((readl(NETX_DPMAS_INT_EN) &
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readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f;
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desc = irq_desc + NETX_IRQ_HIF_CHAINED(0);
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while (stat) {
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if (stat & 1) {
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DEBUG_IRQ("handling irq %d\n", irq);
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desc_handle_irq(irq, desc, regs);
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}
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irq++;
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desc++;
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stat >>= 1;
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}
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}
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static int
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netx_hif_irq_type(unsigned int _irq, unsigned int type)
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{
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unsigned int val, irq;
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val = readl(NETX_DPMAS_IF_CONF1);
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irq = _irq - NETX_IRQ_HIF_CHAINED(0);
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if (type & __IRQT_RISEDGE) {
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DEBUG_IRQ("rising edges\n");
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val |= (1 << 26) << irq;
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}
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if (type & __IRQT_FALEDGE) {
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DEBUG_IRQ("falling edges\n");
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val &= ~((1 << 26) << irq);
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}
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if (type & __IRQT_LOWLVL) {
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DEBUG_IRQ("low level\n");
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val &= ~((1 << 26) << irq);
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}
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if (type & __IRQT_HIGHLVL) {
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DEBUG_IRQ("high level\n");
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val |= (1 << 26) << irq;
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}
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writel(val, NETX_DPMAS_IF_CONF1);
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return 0;
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}
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static void
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netx_hif_ack_irq(unsigned int _irq)
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{
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unsigned int val, irq;
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irq = _irq - NETX_IRQ_HIF_CHAINED(0);
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writel((1 << 24) << irq, NETX_DPMAS_INT_STAT);
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val = readl(NETX_DPMAS_INT_EN);
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val &= ~((1 << 24) << irq);
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writel(val, NETX_DPMAS_INT_EN);
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DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
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}
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static void
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netx_hif_mask_irq(unsigned int _irq)
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{
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unsigned int val, irq;
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irq = _irq - NETX_IRQ_HIF_CHAINED(0);
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val = readl(NETX_DPMAS_INT_EN);
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val &= ~((1 << 24) << irq);
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writel(val, NETX_DPMAS_INT_EN);
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DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
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}
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static void
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netx_hif_unmask_irq(unsigned int _irq)
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{
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unsigned int val, irq;
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irq = _irq - NETX_IRQ_HIF_CHAINED(0);
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val = readl(NETX_DPMAS_INT_EN);
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val |= (1 << 24) << irq;
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writel(val, NETX_DPMAS_INT_EN);
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DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
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}
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static struct irqchip netx_hif_chip = {
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.ack = netx_hif_ack_irq,
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.mask = netx_hif_mask_irq,
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.unmask = netx_hif_unmask_irq,
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.set_type = netx_hif_irq_type,
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};
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void __init netx_init_irq(void)
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{
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int irq;
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vic_init(__io(io_p2v(NETX_PA_VIC)), 0, ~0);
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for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) {
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set_irq_chip(irq, &netx_hif_chip);
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set_irq_handler(irq, do_level_IRQ);
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set_irq_flags(irq, IRQF_VALID);
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}
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writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN);
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set_irq_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler);
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}
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static int __init netx_init(void)
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{
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return platform_add_devices(devices, ARRAY_SIZE(devices));
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}
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subsys_initcall(netx_init);
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24
arch/arm/mach-netx/generic.h
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24
arch/arm/mach-netx/generic.h
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@@ -0,0 +1,24 @@
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/*
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* arch/arm/mach-netx/generic.h
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*
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* Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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extern void __init netx_map_io(void);
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extern void __init netx_init_irq(void);
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struct sys_timer;
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extern struct sys_timer netx_timer;
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88
arch/arm/mach-netx/time.c
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88
arch/arm/mach-netx/time.c
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@@ -0,0 +1,88 @@
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/*
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* arch/arm/mach-netx/time.c
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*
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* Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/mach/time.h>
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#include <asm/arch/netx-regs.h>
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/*
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* Returns number of us since last clock interrupt. Note that interrupts
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* will have been disabled by do_gettimeoffset()
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*/
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static unsigned long netx_gettimeoffset(void)
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{
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return readl(NETX_GPIO_COUNTER_CURRENT(0)) / 100;
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}
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/*
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* IRQ handler for the timer
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*/
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static irqreturn_t
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netx_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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{
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write_seqlock(&xtime_lock);
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timer_tick(regs);
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write_sequnlock(&xtime_lock);
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/* acknowledge interrupt */
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writel(COUNTER_BIT(0), NETX_GPIO_IRQ);
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return IRQ_HANDLED;
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}
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static struct irqaction netx_timer_irq = {
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.name = "NetX Timer Tick",
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.flags = SA_INTERRUPT | SA_TIMER,
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.handler = netx_timer_interrupt,
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};
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/*
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* Set up timer interrupt
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*/
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static void __init netx_timer_init(void)
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{
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/* disable timer initially */
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writel(0, NETX_GPIO_COUNTER_CTRL(0));
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/* Reset the timer value to zero */
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writel(0, NETX_GPIO_COUNTER_CURRENT(0));
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writel(LATCH, NETX_GPIO_COUNTER_MAX(0));
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/* acknowledge interrupt */
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writel(COUNTER_BIT(0), NETX_GPIO_IRQ);
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/* Enable the interrupt in the specific timer register and start timer */
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writel(COUNTER_BIT(0), NETX_GPIO_IRQ_ENABLE);
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writel(NETX_GPIO_COUNTER_CTRL_IRQ_EN | NETX_GPIO_COUNTER_CTRL_RUN,
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NETX_GPIO_COUNTER_CTRL(0));
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setup_irq(NETX_IRQ_TIMER0, &netx_timer_irq);
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}
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struct sys_timer netx_timer = {
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.init = netx_timer_init,
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.offset = netx_gettimeoffset,
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};
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