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357 lines
8.7 KiB
C
357 lines
8.7 KiB
C
/*
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* linux/arch/arm/mach-integrator/integrator_ap.c
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*
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* Copyright (C) 2000-2003 Deep Blue Solutions Ltd
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/sysdev.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/kmi.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/setup.h>
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#include <asm/param.h> /* HZ */
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#include <asm/mach-types.h>
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#include <mach/lm.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/flash.h>
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#include <asm/mach/irq.h>
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#include <asm/mach/map.h>
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#include <asm/mach/time.h>
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#include "common.h"
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/*
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* All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
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* is the (PA >> 12).
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*
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* Setup a VA for the Integrator interrupt controller (for header #0,
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* just for now).
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*/
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#define VA_IC_BASE IO_ADDRESS(INTEGRATOR_IC_BASE)
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#define VA_SC_BASE IO_ADDRESS(INTEGRATOR_SC_BASE)
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#define VA_EBI_BASE IO_ADDRESS(INTEGRATOR_EBI_BASE)
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#define VA_CMIC_BASE IO_ADDRESS(INTEGRATOR_HDR_BASE) + INTEGRATOR_HDR_IC_OFFSET
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/*
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* Logical Physical
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* e8000000 40000000 PCI memory PHYS_PCI_MEM_BASE (max 512M)
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* ec000000 61000000 PCI config space PHYS_PCI_CONFIG_BASE (max 16M)
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* ed000000 62000000 PCI V3 regs PHYS_PCI_V3_BASE (max 64k)
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* ee000000 60000000 PCI IO PHYS_PCI_IO_BASE (max 16M)
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* ef000000 Cache flush
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* f1000000 10000000 Core module registers
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* f1100000 11000000 System controller registers
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* f1200000 12000000 EBI registers
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* f1300000 13000000 Counter/Timer
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* f1400000 14000000 Interrupt controller
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* f1600000 16000000 UART 0
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* f1700000 17000000 UART 1
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* f1a00000 1a000000 Debug LEDs
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* f1b00000 1b000000 GPIO
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*/
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static struct map_desc ap_io_desc[] __initdata = {
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{
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.virtual = IO_ADDRESS(INTEGRATOR_HDR_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_HDR_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_SC_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_SC_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_EBI_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_EBI_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_CT_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_CT_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_UART1_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_UART1_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = IO_ADDRESS(INTEGRATOR_GPIO_BASE),
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.pfn = __phys_to_pfn(INTEGRATOR_GPIO_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = PCI_MEMORY_VADDR,
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.pfn = __phys_to_pfn(PHYS_PCI_MEM_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = PCI_CONFIG_VADDR,
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.pfn = __phys_to_pfn(PHYS_PCI_CONFIG_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = PCI_V3_VADDR,
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.pfn = __phys_to_pfn(PHYS_PCI_V3_BASE),
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.length = SZ_64K,
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.type = MT_DEVICE
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}, {
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.virtual = PCI_IO_VADDR,
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.pfn = __phys_to_pfn(PHYS_PCI_IO_BASE),
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.length = SZ_64K,
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.type = MT_DEVICE
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}
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};
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static void __init ap_map_io(void)
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{
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iotable_init(ap_io_desc, ARRAY_SIZE(ap_io_desc));
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}
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#define INTEGRATOR_SC_VALID_INT 0x003fffff
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static void sc_mask_irq(unsigned int irq)
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{
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writel(1 << irq, VA_IC_BASE + IRQ_ENABLE_CLEAR);
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}
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static void sc_unmask_irq(unsigned int irq)
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{
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writel(1 << irq, VA_IC_BASE + IRQ_ENABLE_SET);
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}
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static struct irq_chip sc_chip = {
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.name = "SC",
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.ack = sc_mask_irq,
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.mask = sc_mask_irq,
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.unmask = sc_unmask_irq,
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};
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static void __init ap_init_irq(void)
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{
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unsigned int i;
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/* Disable all interrupts initially. */
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/* Do the core module ones */
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writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
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/* do the header card stuff next */
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writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
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writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
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for (i = 0; i < NR_IRQS; i++) {
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if (((1 << i) & INTEGRATOR_SC_VALID_INT) != 0) {
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set_irq_chip(i, &sc_chip);
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set_irq_handler(i, handle_level_irq);
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set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
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}
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}
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}
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#ifdef CONFIG_PM
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static unsigned long ic_irq_enable;
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static int irq_suspend(struct sys_device *dev, pm_message_t state)
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{
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ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
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return 0;
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}
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static int irq_resume(struct sys_device *dev)
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{
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/* disable all irq sources */
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writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
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writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
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writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
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writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
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return 0;
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}
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#else
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#define irq_suspend NULL
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#define irq_resume NULL
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#endif
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static struct sysdev_class irq_class = {
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.name = "irq",
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.suspend = irq_suspend,
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.resume = irq_resume,
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};
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static struct sys_device irq_device = {
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.id = 0,
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.cls = &irq_class,
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};
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static int __init irq_init_sysfs(void)
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{
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int ret = sysdev_class_register(&irq_class);
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if (ret == 0)
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ret = sysdev_register(&irq_device);
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return ret;
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}
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device_initcall(irq_init_sysfs);
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/*
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* Flash handling.
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*/
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#define SC_CTRLC (VA_SC_BASE + INTEGRATOR_SC_CTRLC_OFFSET)
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#define SC_CTRLS (VA_SC_BASE + INTEGRATOR_SC_CTRLS_OFFSET)
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#define EBI_CSR1 (VA_EBI_BASE + INTEGRATOR_EBI_CSR1_OFFSET)
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#define EBI_LOCK (VA_EBI_BASE + INTEGRATOR_EBI_LOCK_OFFSET)
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static int ap_flash_init(void)
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{
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u32 tmp;
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writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP, SC_CTRLC);
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tmp = readl(EBI_CSR1) | INTEGRATOR_EBI_WRITE_ENABLE;
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writel(tmp, EBI_CSR1);
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if (!(readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE)) {
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writel(0xa05f, EBI_LOCK);
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writel(tmp, EBI_CSR1);
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writel(0, EBI_LOCK);
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}
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return 0;
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}
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static void ap_flash_exit(void)
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{
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u32 tmp;
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writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP, SC_CTRLC);
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tmp = readl(EBI_CSR1) & ~INTEGRATOR_EBI_WRITE_ENABLE;
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writel(tmp, EBI_CSR1);
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if (readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE) {
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writel(0xa05f, EBI_LOCK);
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writel(tmp, EBI_CSR1);
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writel(0, EBI_LOCK);
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}
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}
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static void ap_flash_set_vpp(int on)
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{
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unsigned long reg = on ? SC_CTRLS : SC_CTRLC;
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writel(INTEGRATOR_SC_CTRL_nFLVPPEN, reg);
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}
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static struct flash_platform_data ap_flash_data = {
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.map_name = "cfi_probe",
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.width = 4,
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.init = ap_flash_init,
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.exit = ap_flash_exit,
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.set_vpp = ap_flash_set_vpp,
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};
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static struct resource cfi_flash_resource = {
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.start = INTEGRATOR_FLASH_BASE,
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.end = INTEGRATOR_FLASH_BASE + INTEGRATOR_FLASH_SIZE - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device cfi_flash_device = {
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.name = "armflash",
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.id = 0,
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.dev = {
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.platform_data = &ap_flash_data,
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},
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.num_resources = 1,
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.resource = &cfi_flash_resource,
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};
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static void __init ap_init(void)
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{
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unsigned long sc_dec;
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int i;
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platform_device_register(&cfi_flash_device);
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sc_dec = readl(VA_SC_BASE + INTEGRATOR_SC_DEC_OFFSET);
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for (i = 0; i < 4; i++) {
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struct lm_device *lmdev;
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if ((sc_dec & (16 << i)) == 0)
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continue;
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lmdev = kzalloc(sizeof(struct lm_device), GFP_KERNEL);
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if (!lmdev)
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continue;
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lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
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lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
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lmdev->resource.flags = IORESOURCE_MEM;
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lmdev->irq = IRQ_AP_EXPINT0 + i;
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lmdev->id = i;
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lm_device_register(lmdev);
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}
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}
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static void __init ap_init_timer(void)
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{
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integrator_time_init(1000000 * TICKS_PER_uSEC / HZ, 0);
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}
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static struct sys_timer ap_timer = {
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.init = ap_init_timer,
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.offset = integrator_gettimeoffset,
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};
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MACHINE_START(INTEGRATOR, "ARM-Integrator")
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/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
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.phys_io = 0x16000000,
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.io_pg_offst = ((0xf1600000) >> 18) & 0xfffc,
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.boot_params = 0x00000100,
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.map_io = ap_map_io,
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.init_irq = ap_init_irq,
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.timer = &ap_timer,
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.init_machine = ap_init,
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MACHINE_END
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