/* * linux/arch/arm/mach-h720x/common.c * * Copyright (C) 2003 Thomas Gleixner <tglx@linutronix.de> * 2003 Robert Schwebel <r.schwebel@pengutronix.de> * 2004 Sascha Hauer <s.hauer@pengutronix.de> * * common stuff for Hynix h720x processors * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #include <linux/sched.h> #include <linux/slab.h> #include <linux/mman.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/dma.h> #include <mach/hardware.h> #include <asm/irq.h> #include <asm/mach/irq.h> #include <asm/mach/map.h> #include <mach/irqs.h> #include <asm/mach/dma.h> #if 0 #define IRQDBG(args...) printk(args) #else #define IRQDBG(args...) do {} while(0) #endif void __init arch_dma_init(dma_t *dma) { } /* * Return usecs since last timer reload * (timercount * (usecs perjiffie)) / (ticks per jiffie) */ unsigned long h720x_gettimeoffset(void) { return (CPU_REG (TIMER_VIRT, TM0_COUNT) * tick_usec) / LATCH; } /* * mask Global irq's */ static void mask_global_irq (unsigned int irq ) { CPU_REG (IRQC_VIRT, IRQC_IER) &= ~(1 << irq); } /* * unmask Global irq's */ static void unmask_global_irq (unsigned int irq ) { CPU_REG (IRQC_VIRT, IRQC_IER) |= (1 << irq); } /* * ack GPIO irq's * Ack only for edge triggered int's valid */ static void inline ack_gpio_irq(u32 irq) { u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq)); u32 bit = IRQ_TO_BIT(irq); if ( (CPU_REG (reg_base, GPIO_EDGE) & bit)) CPU_REG (reg_base, GPIO_CLR) = bit; } /* * mask GPIO irq's */ static void inline mask_gpio_irq(u32 irq) { u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq)); u32 bit = IRQ_TO_BIT(irq); CPU_REG (reg_base, GPIO_MASK) &= ~bit; } /* * unmask GPIO irq's */ static void inline unmask_gpio_irq(u32 irq) { u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq)); u32 bit = IRQ_TO_BIT(irq); CPU_REG (reg_base, GPIO_MASK) |= bit; } static void h720x_gpio_handler(unsigned int mask, unsigned int irq, struct irq_desc *desc) { IRQDBG("%s irq: %d\n", __func__, irq); while (mask) { if (mask & 1) { IRQDBG("handling irq %d\n", irq); generic_handle_irq(irq); } irq++; mask >>= 1; } } static void h720x_gpioa_demux_handler(unsigned int irq_unused, struct irq_desc *desc) { unsigned int mask, irq; mask = CPU_REG(GPIO_A_VIRT,GPIO_STAT); irq = IRQ_CHAINED_GPIOA(0); IRQDBG("%s mask: 0x%08x irq: %d\n", __func__, mask,irq); h720x_gpio_handler(mask, irq, desc); } static void h720x_gpiob_demux_handler(unsigned int irq_unused, struct irq_desc *desc) { unsigned int mask, irq; mask = CPU_REG(GPIO_B_VIRT,GPIO_STAT); irq = IRQ_CHAINED_GPIOB(0); IRQDBG("%s mask: 0x%08x irq: %d\n", __func__, mask,irq); h720x_gpio_handler(mask, irq, desc); } static void h720x_gpioc_demux_handler(unsigned int irq_unused, struct irq_desc *desc) { unsigned int mask, irq; mask = CPU_REG(GPIO_C_VIRT,GPIO_STAT); irq = IRQ_CHAINED_GPIOC(0); IRQDBG("%s mask: 0x%08x irq: %d\n", __func__, mask,irq); h720x_gpio_handler(mask, irq, desc); } static void h720x_gpiod_demux_handler(unsigned int irq_unused, struct irq_desc *desc) { unsigned int mask, irq; mask = CPU_REG(GPIO_D_VIRT,GPIO_STAT); irq = IRQ_CHAINED_GPIOD(0); IRQDBG("%s mask: 0x%08x irq: %d\n", __func__, mask,irq); h720x_gpio_handler(mask, irq, desc); } #ifdef CONFIG_CPU_H7202 static void h720x_gpioe_demux_handler(unsigned int irq_unused, struct irq_desc *desc) { unsigned int mask, irq; mask = CPU_REG(GPIO_E_VIRT,GPIO_STAT); irq = IRQ_CHAINED_GPIOE(0); IRQDBG("%s mask: 0x%08x irq: %d\n", __func__, mask,irq); h720x_gpio_handler(mask, irq, desc); } #endif static struct irq_chip h720x_global_chip = { .ack = mask_global_irq, .mask = mask_global_irq, .unmask = unmask_global_irq, }; static struct irq_chip h720x_gpio_chip = { .ack = ack_gpio_irq, .mask = mask_gpio_irq, .unmask = unmask_gpio_irq, }; /* * Initialize IRQ's, mask all, enable multiplexed irq's */ void __init h720x_init_irq (void) { int irq; /* Mask global irq's */ CPU_REG (IRQC_VIRT, IRQC_IER) = 0x0; /* Mask all multiplexed irq's */ CPU_REG (GPIO_A_VIRT, GPIO_MASK) = 0x0; CPU_REG (GPIO_B_VIRT, GPIO_MASK) = 0x0; CPU_REG (GPIO_C_VIRT, GPIO_MASK) = 0x0; CPU_REG (GPIO_D_VIRT, GPIO_MASK) = 0x0; /* Initialize global IRQ's, fast path */ for (irq = 0; irq < NR_GLBL_IRQS; irq++) { set_irq_chip(irq, &h720x_global_chip); set_irq_handler(irq, handle_level_irq); set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); } /* Initialize multiplexed IRQ's, slow path */ for (irq = IRQ_CHAINED_GPIOA(0) ; irq <= IRQ_CHAINED_GPIOD(31); irq++) { set_irq_chip(irq, &h720x_gpio_chip); set_irq_handler(irq, handle_edge_irq); set_irq_flags(irq, IRQF_VALID ); } set_irq_chained_handler(IRQ_GPIOA, h720x_gpioa_demux_handler); set_irq_chained_handler(IRQ_GPIOB, h720x_gpiob_demux_handler); set_irq_chained_handler(IRQ_GPIOC, h720x_gpioc_demux_handler); set_irq_chained_handler(IRQ_GPIOD, h720x_gpiod_demux_handler); #ifdef CONFIG_CPU_H7202 for (irq = IRQ_CHAINED_GPIOE(0) ; irq <= IRQ_CHAINED_GPIOE(31); irq++) { set_irq_chip(irq, &h720x_gpio_chip); set_irq_handler(irq, handle_edge_irq); set_irq_flags(irq, IRQF_VALID ); } set_irq_chained_handler(IRQ_GPIOE, h720x_gpioe_demux_handler); #endif /* Enable multiplexed irq's */ CPU_REG (IRQC_VIRT, IRQC_IER) = IRQ_ENA_MUX; } static struct map_desc h720x_io_desc[] __initdata = { { .virtual = IO_VIRT, .pfn = __phys_to_pfn(IO_PHYS), .length = IO_SIZE, .type = MT_DEVICE }, }; /* Initialize io tables */ void __init h720x_map_io(void) { iotable_init(h720x_io_desc,ARRAY_SIZE(h720x_io_desc)); }