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fa0fe48fcc
Other machines may wish to make use of the VIC support code, so move it to arch/arm/common. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
920 lines
22 KiB
C
920 lines
22 KiB
C
/*
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* linux/arch/arm/mach-versatile/core.c
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*
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* Copyright (C) 1999 - 2003 ARM Limited
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* Copyright (C) 2000 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/config.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/sysdev.h>
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#include <linux/interrupt.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/clcd.h>
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#include <asm/system.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/leds.h>
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#include <asm/hardware/arm_timer.h>
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#include <asm/hardware/icst307.h>
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#include <asm/hardware/vic.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/time.h>
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#include <asm/mach/map.h>
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#include <asm/mach/mmc.h>
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#include "core.h"
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#include "clock.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 Versatile Vectored Interrupt Controller.
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*/
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#define __io_address(n) __io(IO_ADDRESS(n))
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#define VA_VIC_BASE __io_address(VERSATILE_VIC_BASE)
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#define VA_SIC_BASE __io_address(VERSATILE_SIC_BASE)
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static void sic_mask_irq(unsigned int irq)
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{
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irq -= IRQ_SIC_START;
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writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
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}
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static void sic_unmask_irq(unsigned int irq)
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{
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irq -= IRQ_SIC_START;
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writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_SET);
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}
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static struct irqchip sic_chip = {
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.ack = sic_mask_irq,
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.mask = sic_mask_irq,
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.unmask = sic_unmask_irq,
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};
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static void
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sic_handle_irq(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
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{
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unsigned long status = readl(VA_SIC_BASE + SIC_IRQ_STATUS);
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if (status == 0) {
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do_bad_IRQ(irq, desc, regs);
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return;
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}
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do {
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irq = ffs(status) - 1;
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status &= ~(1 << irq);
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irq += IRQ_SIC_START;
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desc = irq_desc + irq;
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desc_handle_irq(irq, desc, regs);
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} while (status);
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}
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#if 1
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#define IRQ_MMCI0A IRQ_VICSOURCE22
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#define IRQ_AACI IRQ_VICSOURCE24
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#define IRQ_ETH IRQ_VICSOURCE25
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#define PIC_MASK 0xFFD00000
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#else
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#define IRQ_MMCI0A IRQ_SIC_MMCI0A
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#define IRQ_AACI IRQ_SIC_AACI
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#define IRQ_ETH IRQ_SIC_ETH
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#define PIC_MASK 0
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#endif
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void __init versatile_init_irq(void)
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{
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unsigned int i;
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vic_init(VA_VIC_BASE, ~(1 << 31));
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set_irq_handler(IRQ_VICSOURCE31, sic_handle_irq);
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enable_irq(IRQ_VICSOURCE31);
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/* Do second interrupt controller */
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writel(~0, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
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for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
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if ((PIC_MASK & (1 << (i - IRQ_SIC_START))) == 0) {
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set_irq_chip(i, &sic_chip);
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set_irq_handler(i, do_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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* Interrupts on secondary controller from 0 to 8 are routed to
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* source 31 on PIC.
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* Interrupts from 21 to 31 are routed directly to the VIC on
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* the corresponding number on primary controller. This is controlled
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* by setting PIC_ENABLEx.
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*/
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writel(PIC_MASK, VA_SIC_BASE + SIC_INT_PIC_ENABLE);
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}
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static struct map_desc versatile_io_desc[] __initdata = {
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{
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.virtual = IO_ADDRESS(VERSATILE_SYS_BASE),
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.pfn = __phys_to_pfn(VERSATILE_SYS_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(VERSATILE_SIC_BASE),
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.pfn = __phys_to_pfn(VERSATILE_SIC_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(VERSATILE_VIC_BASE),
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.pfn = __phys_to_pfn(VERSATILE_VIC_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(VERSATILE_SCTL_BASE),
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.pfn = __phys_to_pfn(VERSATILE_SCTL_BASE),
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.length = SZ_4K * 9,
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.type = MT_DEVICE
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},
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#ifdef CONFIG_MACH_VERSATILE_AB
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{
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.virtual = IO_ADDRESS(VERSATILE_GPIO0_BASE),
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.pfn = __phys_to_pfn(VERSATILE_GPIO0_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(VERSATILE_IB2_BASE),
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.pfn = __phys_to_pfn(VERSATILE_IB2_BASE),
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.length = SZ_64M,
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.type = MT_DEVICE
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},
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#endif
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#ifdef CONFIG_DEBUG_LL
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{
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.virtual = IO_ADDRESS(VERSATILE_UART0_BASE),
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.pfn = __phys_to_pfn(VERSATILE_UART0_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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},
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#endif
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#ifdef CONFIG_PCI
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{
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.virtual = IO_ADDRESS(VERSATILE_PCI_CORE_BASE),
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.pfn = __phys_to_pfn(VERSATILE_PCI_CORE_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = VERSATILE_PCI_VIRT_BASE,
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.pfn = __phys_to_pfn(VERSATILE_PCI_BASE),
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.length = VERSATILE_PCI_BASE_SIZE,
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.type = MT_DEVICE
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}, {
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.virtual = VERSATILE_PCI_CFG_VIRT_BASE,
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.pfn = __phys_to_pfn(VERSATILE_PCI_CFG_BASE),
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.length = VERSATILE_PCI_CFG_BASE_SIZE,
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.type = MT_DEVICE
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},
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#if 0
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{
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.virtual = VERSATILE_PCI_VIRT_MEM_BASE0,
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.pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE0),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = VERSATILE_PCI_VIRT_MEM_BASE1,
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.pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE1),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = VERSATILE_PCI_VIRT_MEM_BASE2,
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.pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE2),
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.length = SZ_16M,
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.type = MT_DEVICE
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},
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#endif
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#endif
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};
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void __init versatile_map_io(void)
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{
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iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
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}
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#define VERSATILE_REFCOUNTER (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET)
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/*
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* This is the Versatile sched_clock implementation. This has
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* a resolution of 41.7ns, and a maximum value of about 179s.
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*/
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unsigned long long sched_clock(void)
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{
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unsigned long long v;
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v = (unsigned long long)readl(VERSATILE_REFCOUNTER) * 125;
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do_div(v, 3);
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return v;
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}
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#define VERSATILE_FLASHCTRL (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_FLASH_OFFSET)
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static int versatile_flash_init(void)
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{
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u32 val;
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val = __raw_readl(VERSATILE_FLASHCTRL);
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val &= ~VERSATILE_FLASHPROG_FLVPPEN;
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__raw_writel(val, VERSATILE_FLASHCTRL);
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return 0;
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}
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static void versatile_flash_exit(void)
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{
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u32 val;
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val = __raw_readl(VERSATILE_FLASHCTRL);
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val &= ~VERSATILE_FLASHPROG_FLVPPEN;
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__raw_writel(val, VERSATILE_FLASHCTRL);
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}
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static void versatile_flash_set_vpp(int on)
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{
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u32 val;
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val = __raw_readl(VERSATILE_FLASHCTRL);
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if (on)
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val |= VERSATILE_FLASHPROG_FLVPPEN;
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else
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val &= ~VERSATILE_FLASHPROG_FLVPPEN;
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__raw_writel(val, VERSATILE_FLASHCTRL);
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}
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static struct flash_platform_data versatile_flash_data = {
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.map_name = "cfi_probe",
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.width = 4,
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.init = versatile_flash_init,
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.exit = versatile_flash_exit,
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.set_vpp = versatile_flash_set_vpp,
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};
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static struct resource versatile_flash_resource = {
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.start = VERSATILE_FLASH_BASE,
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.end = VERSATILE_FLASH_BASE + VERSATILE_FLASH_SIZE,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device versatile_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 = &versatile_flash_data,
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},
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.num_resources = 1,
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.resource = &versatile_flash_resource,
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};
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static struct resource smc91x_resources[] = {
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[0] = {
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.start = VERSATILE_ETH_BASE,
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.end = VERSATILE_ETH_BASE + SZ_64K - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_ETH,
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.end = IRQ_ETH,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device smc91x_device = {
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.name = "smc91x",
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.id = 0,
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.num_resources = ARRAY_SIZE(smc91x_resources),
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.resource = smc91x_resources,
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};
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#define VERSATILE_SYSMCI (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET)
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unsigned int mmc_status(struct device *dev)
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{
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struct amba_device *adev = container_of(dev, struct amba_device, dev);
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u32 mask;
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if (adev->res.start == VERSATILE_MMCI0_BASE)
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mask = 1;
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else
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mask = 2;
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return readl(VERSATILE_SYSMCI) & mask;
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}
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static struct mmc_platform_data mmc0_plat_data = {
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.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
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.status = mmc_status,
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};
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/*
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* Clock handling
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*/
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static const struct icst307_params versatile_oscvco_params = {
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.ref = 24000,
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.vco_max = 200000,
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.vd_min = 4 + 8,
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.vd_max = 511 + 8,
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.rd_min = 1 + 2,
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.rd_max = 127 + 2,
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};
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static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco)
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{
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void __iomem *sys_lock = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LOCK_OFFSET;
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#if defined(CONFIG_ARCH_VERSATILE_PB)
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void __iomem *sys_osc = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_OSC4_OFFSET;
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#elif defined(CONFIG_MACH_VERSATILE_AB)
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void __iomem *sys_osc = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_OSC1_OFFSET;
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#endif
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u32 val;
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val = readl(sys_osc) & ~0x7ffff;
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val |= vco.v | (vco.r << 9) | (vco.s << 16);
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writel(0xa05f, sys_lock);
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writel(val, sys_osc);
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writel(0, sys_lock);
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}
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static struct clk versatile_clcd_clk = {
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.name = "CLCDCLK",
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.params = &versatile_oscvco_params,
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.setvco = versatile_oscvco_set,
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};
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/*
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* CLCD support.
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*/
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#define SYS_CLCD_MODE_MASK (3 << 0)
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#define SYS_CLCD_MODE_888 (0 << 0)
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#define SYS_CLCD_MODE_5551 (1 << 0)
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#define SYS_CLCD_MODE_565_RLSB (2 << 0)
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#define SYS_CLCD_MODE_565_BLSB (3 << 0)
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#define SYS_CLCD_NLCDIOON (1 << 2)
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#define SYS_CLCD_VDDPOSSWITCH (1 << 3)
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#define SYS_CLCD_PWR3V5SWITCH (1 << 4)
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#define SYS_CLCD_ID_MASK (0x1f << 8)
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#define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
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#define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
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#define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
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#define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
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#define SYS_CLCD_ID_VGA (0x1f << 8)
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static struct clcd_panel vga = {
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.mode = {
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.name = "VGA",
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.refresh = 60,
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.xres = 640,
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.yres = 480,
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.pixclock = 39721,
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.left_margin = 40,
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.right_margin = 24,
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.upper_margin = 32,
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.lower_margin = 11,
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.hsync_len = 96,
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.vsync_len = 2,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.bpp = 16,
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};
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static struct clcd_panel sanyo_3_8_in = {
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.mode = {
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.name = "Sanyo QVGA",
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.refresh = 116,
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.xres = 320,
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.yres = 240,
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.pixclock = 100000,
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.left_margin = 6,
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.right_margin = 6,
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.upper_margin = 5,
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.lower_margin = 5,
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.hsync_len = 6,
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.vsync_len = 6,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.bpp = 16,
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};
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static struct clcd_panel sanyo_2_5_in = {
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.mode = {
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.name = "Sanyo QVGA Portrait",
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.refresh = 116,
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.xres = 240,
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.yres = 320,
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.pixclock = 100000,
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.left_margin = 20,
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.right_margin = 10,
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.upper_margin = 2,
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.lower_margin = 2,
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.hsync_len = 10,
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.vsync_len = 2,
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.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_IVS | TIM2_IHS | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.bpp = 16,
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};
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static struct clcd_panel epson_2_2_in = {
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.mode = {
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.name = "Epson QCIF",
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.refresh = 390,
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.xres = 176,
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.yres = 220,
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.pixclock = 62500,
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.left_margin = 3,
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.right_margin = 2,
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.upper_margin = 1,
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.lower_margin = 0,
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.hsync_len = 3,
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.vsync_len = 2,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.bpp = 16,
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};
|
|
|
|
/*
|
|
* Detect which LCD panel is connected, and return the appropriate
|
|
* clcd_panel structure. Note: we do not have any information on
|
|
* the required timings for the 8.4in panel, so we presently assume
|
|
* VGA timings.
|
|
*/
|
|
static struct clcd_panel *versatile_clcd_panel(void)
|
|
{
|
|
void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
|
|
struct clcd_panel *panel = &vga;
|
|
u32 val;
|
|
|
|
val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
|
|
if (val == SYS_CLCD_ID_SANYO_3_8)
|
|
panel = &sanyo_3_8_in;
|
|
else if (val == SYS_CLCD_ID_SANYO_2_5)
|
|
panel = &sanyo_2_5_in;
|
|
else if (val == SYS_CLCD_ID_EPSON_2_2)
|
|
panel = &epson_2_2_in;
|
|
else if (val == SYS_CLCD_ID_VGA)
|
|
panel = &vga;
|
|
else {
|
|
printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
|
|
val);
|
|
panel = &vga;
|
|
}
|
|
|
|
return panel;
|
|
}
|
|
|
|
/*
|
|
* Disable all display connectors on the interface module.
|
|
*/
|
|
static void versatile_clcd_disable(struct clcd_fb *fb)
|
|
{
|
|
void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
|
|
u32 val;
|
|
|
|
val = readl(sys_clcd);
|
|
val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
|
|
writel(val, sys_clcd);
|
|
|
|
#ifdef CONFIG_MACH_VERSATILE_AB
|
|
/*
|
|
* If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
|
|
*/
|
|
if (fb->panel == &sanyo_2_5_in) {
|
|
void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
|
|
unsigned long ctrl;
|
|
|
|
ctrl = readl(versatile_ib2_ctrl);
|
|
ctrl &= ~0x01;
|
|
writel(ctrl, versatile_ib2_ctrl);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Enable the relevant connector on the interface module.
|
|
*/
|
|
static void versatile_clcd_enable(struct clcd_fb *fb)
|
|
{
|
|
void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
|
|
u32 val;
|
|
|
|
val = readl(sys_clcd);
|
|
val &= ~SYS_CLCD_MODE_MASK;
|
|
|
|
switch (fb->fb.var.green.length) {
|
|
case 5:
|
|
val |= SYS_CLCD_MODE_5551;
|
|
break;
|
|
case 6:
|
|
val |= SYS_CLCD_MODE_565_RLSB;
|
|
break;
|
|
case 8:
|
|
val |= SYS_CLCD_MODE_888;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Set the MUX
|
|
*/
|
|
writel(val, sys_clcd);
|
|
|
|
/*
|
|
* And now enable the PSUs
|
|
*/
|
|
val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
|
|
writel(val, sys_clcd);
|
|
|
|
#ifdef CONFIG_MACH_VERSATILE_AB
|
|
/*
|
|
* If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
|
|
*/
|
|
if (fb->panel == &sanyo_2_5_in) {
|
|
void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
|
|
unsigned long ctrl;
|
|
|
|
ctrl = readl(versatile_ib2_ctrl);
|
|
ctrl |= 0x01;
|
|
writel(ctrl, versatile_ib2_ctrl);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static unsigned long framesize = SZ_1M;
|
|
|
|
static int versatile_clcd_setup(struct clcd_fb *fb)
|
|
{
|
|
dma_addr_t dma;
|
|
|
|
fb->panel = versatile_clcd_panel();
|
|
|
|
fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
|
|
&dma, GFP_KERNEL);
|
|
if (!fb->fb.screen_base) {
|
|
printk(KERN_ERR "CLCD: unable to map framebuffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fb->fb.fix.smem_start = dma;
|
|
fb->fb.fix.smem_len = framesize;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int versatile_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
|
|
{
|
|
return dma_mmap_writecombine(&fb->dev->dev, vma,
|
|
fb->fb.screen_base,
|
|
fb->fb.fix.smem_start,
|
|
fb->fb.fix.smem_len);
|
|
}
|
|
|
|
static void versatile_clcd_remove(struct clcd_fb *fb)
|
|
{
|
|
dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
|
|
fb->fb.screen_base, fb->fb.fix.smem_start);
|
|
}
|
|
|
|
static struct clcd_board clcd_plat_data = {
|
|
.name = "Versatile",
|
|
.check = clcdfb_check,
|
|
.decode = clcdfb_decode,
|
|
.disable = versatile_clcd_disable,
|
|
.enable = versatile_clcd_enable,
|
|
.setup = versatile_clcd_setup,
|
|
.mmap = versatile_clcd_mmap,
|
|
.remove = versatile_clcd_remove,
|
|
};
|
|
|
|
#define AACI_IRQ { IRQ_AACI, NO_IRQ }
|
|
#define AACI_DMA { 0x80, 0x81 }
|
|
#define MMCI0_IRQ { IRQ_MMCI0A,IRQ_SIC_MMCI0B }
|
|
#define MMCI0_DMA { 0x84, 0 }
|
|
#define KMI0_IRQ { IRQ_SIC_KMI0, NO_IRQ }
|
|
#define KMI0_DMA { 0, 0 }
|
|
#define KMI1_IRQ { IRQ_SIC_KMI1, NO_IRQ }
|
|
#define KMI1_DMA { 0, 0 }
|
|
|
|
/*
|
|
* These devices are connected directly to the multi-layer AHB switch
|
|
*/
|
|
#define SMC_IRQ { NO_IRQ, NO_IRQ }
|
|
#define SMC_DMA { 0, 0 }
|
|
#define MPMC_IRQ { NO_IRQ, NO_IRQ }
|
|
#define MPMC_DMA { 0, 0 }
|
|
#define CLCD_IRQ { IRQ_CLCDINT, NO_IRQ }
|
|
#define CLCD_DMA { 0, 0 }
|
|
#define DMAC_IRQ { IRQ_DMAINT, NO_IRQ }
|
|
#define DMAC_DMA { 0, 0 }
|
|
|
|
/*
|
|
* These devices are connected via the core APB bridge
|
|
*/
|
|
#define SCTL_IRQ { NO_IRQ, NO_IRQ }
|
|
#define SCTL_DMA { 0, 0 }
|
|
#define WATCHDOG_IRQ { IRQ_WDOGINT, NO_IRQ }
|
|
#define WATCHDOG_DMA { 0, 0 }
|
|
#define GPIO0_IRQ { IRQ_GPIOINT0, NO_IRQ }
|
|
#define GPIO0_DMA { 0, 0 }
|
|
#define GPIO1_IRQ { IRQ_GPIOINT1, NO_IRQ }
|
|
#define GPIO1_DMA { 0, 0 }
|
|
#define RTC_IRQ { IRQ_RTCINT, NO_IRQ }
|
|
#define RTC_DMA { 0, 0 }
|
|
|
|
/*
|
|
* These devices are connected via the DMA APB bridge
|
|
*/
|
|
#define SCI_IRQ { IRQ_SCIINT, NO_IRQ }
|
|
#define SCI_DMA { 7, 6 }
|
|
#define UART0_IRQ { IRQ_UARTINT0, NO_IRQ }
|
|
#define UART0_DMA { 15, 14 }
|
|
#define UART1_IRQ { IRQ_UARTINT1, NO_IRQ }
|
|
#define UART1_DMA { 13, 12 }
|
|
#define UART2_IRQ { IRQ_UARTINT2, NO_IRQ }
|
|
#define UART2_DMA { 11, 10 }
|
|
#define SSP_IRQ { IRQ_SSPINT, NO_IRQ }
|
|
#define SSP_DMA { 9, 8 }
|
|
|
|
/* FPGA Primecells */
|
|
AMBA_DEVICE(aaci, "fpga:04", AACI, NULL);
|
|
AMBA_DEVICE(mmc0, "fpga:05", MMCI0, &mmc0_plat_data);
|
|
AMBA_DEVICE(kmi0, "fpga:06", KMI0, NULL);
|
|
AMBA_DEVICE(kmi1, "fpga:07", KMI1, NULL);
|
|
|
|
/* DevChip Primecells */
|
|
AMBA_DEVICE(smc, "dev:00", SMC, NULL);
|
|
AMBA_DEVICE(mpmc, "dev:10", MPMC, NULL);
|
|
AMBA_DEVICE(clcd, "dev:20", CLCD, &clcd_plat_data);
|
|
AMBA_DEVICE(dmac, "dev:30", DMAC, NULL);
|
|
AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL);
|
|
AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL);
|
|
AMBA_DEVICE(gpio0, "dev:e4", GPIO0, NULL);
|
|
AMBA_DEVICE(gpio1, "dev:e5", GPIO1, NULL);
|
|
AMBA_DEVICE(rtc, "dev:e8", RTC, NULL);
|
|
AMBA_DEVICE(sci0, "dev:f0", SCI, NULL);
|
|
AMBA_DEVICE(uart0, "dev:f1", UART0, NULL);
|
|
AMBA_DEVICE(uart1, "dev:f2", UART1, NULL);
|
|
AMBA_DEVICE(uart2, "dev:f3", UART2, NULL);
|
|
AMBA_DEVICE(ssp0, "dev:f4", SSP, NULL);
|
|
|
|
static struct amba_device *amba_devs[] __initdata = {
|
|
&dmac_device,
|
|
&uart0_device,
|
|
&uart1_device,
|
|
&uart2_device,
|
|
&smc_device,
|
|
&mpmc_device,
|
|
&clcd_device,
|
|
&sctl_device,
|
|
&wdog_device,
|
|
&gpio0_device,
|
|
&gpio1_device,
|
|
&rtc_device,
|
|
&sci0_device,
|
|
&ssp0_device,
|
|
&aaci_device,
|
|
&mmc0_device,
|
|
&kmi0_device,
|
|
&kmi1_device,
|
|
};
|
|
|
|
#ifdef CONFIG_LEDS
|
|
#define VA_LEDS_BASE (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LED_OFFSET)
|
|
|
|
static void versatile_leds_event(led_event_t ledevt)
|
|
{
|
|
unsigned long flags;
|
|
u32 val;
|
|
|
|
local_irq_save(flags);
|
|
val = readl(VA_LEDS_BASE);
|
|
|
|
switch (ledevt) {
|
|
case led_idle_start:
|
|
val = val & ~VERSATILE_SYS_LED0;
|
|
break;
|
|
|
|
case led_idle_end:
|
|
val = val | VERSATILE_SYS_LED0;
|
|
break;
|
|
|
|
case led_timer:
|
|
val = val ^ VERSATILE_SYS_LED1;
|
|
break;
|
|
|
|
case led_halted:
|
|
val = 0;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
writel(val, VA_LEDS_BASE);
|
|
local_irq_restore(flags);
|
|
}
|
|
#endif /* CONFIG_LEDS */
|
|
|
|
void __init versatile_init(void)
|
|
{
|
|
int i;
|
|
|
|
clk_register(&versatile_clcd_clk);
|
|
|
|
platform_device_register(&versatile_flash_device);
|
|
platform_device_register(&smc91x_device);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
|
|
struct amba_device *d = amba_devs[i];
|
|
amba_device_register(d, &iomem_resource);
|
|
}
|
|
|
|
#ifdef CONFIG_LEDS
|
|
leds_event = versatile_leds_event;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Where is the timer (VA)?
|
|
*/
|
|
#define TIMER0_VA_BASE __io_address(VERSATILE_TIMER0_1_BASE)
|
|
#define TIMER1_VA_BASE (__io_address(VERSATILE_TIMER0_1_BASE) + 0x20)
|
|
#define TIMER2_VA_BASE __io_address(VERSATILE_TIMER2_3_BASE)
|
|
#define TIMER3_VA_BASE (__io_address(VERSATILE_TIMER2_3_BASE) + 0x20)
|
|
#define VA_IC_BASE __io_address(VERSATILE_VIC_BASE)
|
|
|
|
/*
|
|
* How long is the timer interval?
|
|
*/
|
|
#define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10)
|
|
#if TIMER_INTERVAL >= 0x100000
|
|
#define TIMER_RELOAD (TIMER_INTERVAL >> 8)
|
|
#define TIMER_DIVISOR (TIMER_CTRL_DIV256)
|
|
#define TICKS2USECS(x) (256 * (x) / TICKS_PER_uSEC)
|
|
#elif TIMER_INTERVAL >= 0x10000
|
|
#define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */
|
|
#define TIMER_DIVISOR (TIMER_CTRL_DIV16)
|
|
#define TICKS2USECS(x) (16 * (x) / TICKS_PER_uSEC)
|
|
#else
|
|
#define TIMER_RELOAD (TIMER_INTERVAL)
|
|
#define TIMER_DIVISOR (TIMER_CTRL_DIV1)
|
|
#define TICKS2USECS(x) ((x) / TICKS_PER_uSEC)
|
|
#endif
|
|
|
|
/*
|
|
* Returns number of ms since last clock interrupt. Note that interrupts
|
|
* will have been disabled by do_gettimeoffset()
|
|
*/
|
|
static unsigned long versatile_gettimeoffset(void)
|
|
{
|
|
unsigned long ticks1, ticks2, status;
|
|
|
|
/*
|
|
* Get the current number of ticks. Note that there is a race
|
|
* condition between us reading the timer and checking for
|
|
* an interrupt. We get around this by ensuring that the
|
|
* counter has not reloaded between our two reads.
|
|
*/
|
|
ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
|
|
do {
|
|
ticks1 = ticks2;
|
|
status = __raw_readl(VA_IC_BASE + VIC_RAW_STATUS);
|
|
ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
|
|
} while (ticks2 > ticks1);
|
|
|
|
/*
|
|
* Number of ticks since last interrupt.
|
|
*/
|
|
ticks1 = TIMER_RELOAD - ticks2;
|
|
|
|
/*
|
|
* Interrupt pending? If so, we've reloaded once already.
|
|
*
|
|
* FIXME: Need to check this is effectively timer 0 that expires
|
|
*/
|
|
if (status & IRQMASK_TIMERINT0_1)
|
|
ticks1 += TIMER_RELOAD;
|
|
|
|
/*
|
|
* Convert the ticks to usecs
|
|
*/
|
|
return TICKS2USECS(ticks1);
|
|
}
|
|
|
|
/*
|
|
* IRQ handler for the timer
|
|
*/
|
|
static irqreturn_t versatile_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
write_seqlock(&xtime_lock);
|
|
|
|
// ...clear the interrupt
|
|
writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
|
|
|
|
timer_tick(regs);
|
|
|
|
write_sequnlock(&xtime_lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct irqaction versatile_timer_irq = {
|
|
.name = "Versatile Timer Tick",
|
|
.flags = SA_INTERRUPT | SA_TIMER,
|
|
.handler = versatile_timer_interrupt,
|
|
};
|
|
|
|
/*
|
|
* Set up timer interrupt, and return the current time in seconds.
|
|
*/
|
|
static void __init versatile_timer_init(void)
|
|
{
|
|
u32 val;
|
|
|
|
/*
|
|
* set clock frequency:
|
|
* VERSATILE_REFCLK is 32KHz
|
|
* VERSATILE_TIMCLK is 1MHz
|
|
*/
|
|
val = readl(__io_address(VERSATILE_SCTL_BASE));
|
|
writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
|
|
(VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
|
|
(VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
|
|
(VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
|
|
__io_address(VERSATILE_SCTL_BASE));
|
|
|
|
/*
|
|
* Initialise to a known state (all timers off)
|
|
*/
|
|
writel(0, TIMER0_VA_BASE + TIMER_CTRL);
|
|
writel(0, TIMER1_VA_BASE + TIMER_CTRL);
|
|
writel(0, TIMER2_VA_BASE + TIMER_CTRL);
|
|
writel(0, TIMER3_VA_BASE + TIMER_CTRL);
|
|
|
|
writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD);
|
|
writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_VALUE);
|
|
writel(TIMER_DIVISOR | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC |
|
|
TIMER_CTRL_IE, TIMER0_VA_BASE + TIMER_CTRL);
|
|
|
|
/*
|
|
* Make irqs happen for the system timer
|
|
*/
|
|
setup_irq(IRQ_TIMERINT0_1, &versatile_timer_irq);
|
|
}
|
|
|
|
struct sys_timer versatile_timer = {
|
|
.init = versatile_timer_init,
|
|
.offset = versatile_gettimeoffset,
|
|
};
|