2 * linux/arch/arm/mach-h720x/common.c
4 * Copyright (C) 2003 Thomas Gleixner <tglx@linutronix.de>
5 * 2003 Robert Schwebel <r.schwebel@pengutronix.de>
6 * 2004 Sascha Hauer <s.hauer@pengutronix.de>
8 * common stuff for Hynix h720x processors
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
16 #include <linux/sched.h>
17 #include <linux/slab.h>
18 #include <linux/mman.h>
19 #include <linux/init.h>
20 #include <linux/interrupt.h>
23 #include <asm/pgtable.h>
26 #include <asm/hardware.h>
28 #include <asm/mach/irq.h>
29 #include <asm/mach/map.h>
30 #include <asm/arch/irqs.h>
32 #include <asm/mach/dma.h>
35 #define IRQDBG(args...) printk(args)
37 #define IRQDBG(args...) do {} while(0)
40 void __init arch_dma_init(dma_t *dma)
45 * Return usecs since last timer reload
46 * (timercount * (usecs perjiffie)) / (ticks per jiffie)
48 unsigned long h720x_gettimeoffset(void)
50 return (CPU_REG (TIMER_VIRT, TM0_COUNT) * tick_usec) / LATCH;
56 static void mask_global_irq (unsigned int irq )
58 CPU_REG (IRQC_VIRT, IRQC_IER) &= ~(1 << irq);
64 static void unmask_global_irq (unsigned int irq )
66 CPU_REG (IRQC_VIRT, IRQC_IER) |= (1 << irq);
72 * Ack only for edge triggered int's valid
74 static void inline ack_gpio_irq(u32 irq)
76 u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq));
77 u32 bit = IRQ_TO_BIT(irq);
78 if ( (CPU_REG (reg_base, GPIO_EDGE) & bit))
79 CPU_REG (reg_base, GPIO_CLR) = bit;
85 static void inline mask_gpio_irq(u32 irq)
87 u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq));
88 u32 bit = IRQ_TO_BIT(irq);
89 CPU_REG (reg_base, GPIO_MASK) &= ~bit;
95 static void inline unmask_gpio_irq(u32 irq)
97 u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq));
98 u32 bit = IRQ_TO_BIT(irq);
99 CPU_REG (reg_base, GPIO_MASK) |= bit;
103 h720x_gpio_handler(unsigned int mask, unsigned int irq,
104 struct irqdesc *desc)
106 IRQDBG("%s irq: %d\n",__FUNCTION__,irq);
107 desc = irq_desc + irq;
110 IRQDBG("handling irq %d\n", irq);
111 desc_handle_irq(irq, desc);
120 h720x_gpioa_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
122 unsigned int mask, irq;
124 mask = CPU_REG(GPIO_A_VIRT,GPIO_STAT);
125 irq = IRQ_CHAINED_GPIOA(0);
126 IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
127 h720x_gpio_handler(mask, irq, desc);
131 h720x_gpiob_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
133 unsigned int mask, irq;
134 mask = CPU_REG(GPIO_B_VIRT,GPIO_STAT);
135 irq = IRQ_CHAINED_GPIOB(0);
136 IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
137 h720x_gpio_handler(mask, irq, desc);
141 h720x_gpioc_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
143 unsigned int mask, irq;
145 mask = CPU_REG(GPIO_C_VIRT,GPIO_STAT);
146 irq = IRQ_CHAINED_GPIOC(0);
147 IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
148 h720x_gpio_handler(mask, irq, desc);
152 h720x_gpiod_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
154 unsigned int mask, irq;
156 mask = CPU_REG(GPIO_D_VIRT,GPIO_STAT);
157 irq = IRQ_CHAINED_GPIOD(0);
158 IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
159 h720x_gpio_handler(mask, irq, desc);
162 #ifdef CONFIG_CPU_H7202
164 h720x_gpioe_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
166 unsigned int mask, irq;
168 mask = CPU_REG(GPIO_E_VIRT,GPIO_STAT);
169 irq = IRQ_CHAINED_GPIOE(0);
170 IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
171 h720x_gpio_handler(mask, irq, desc);
175 static struct irqchip h720x_global_chip = {
176 .ack = mask_global_irq,
177 .mask = mask_global_irq,
178 .unmask = unmask_global_irq,
181 static struct irqchip h720x_gpio_chip = {
183 .mask = mask_gpio_irq,
184 .unmask = unmask_gpio_irq,
188 * Initialize IRQ's, mask all, enable multiplexed irq's
190 void __init h720x_init_irq (void)
194 /* Mask global irq's */
195 CPU_REG (IRQC_VIRT, IRQC_IER) = 0x0;
197 /* Mask all multiplexed irq's */
198 CPU_REG (GPIO_A_VIRT, GPIO_MASK) = 0x0;
199 CPU_REG (GPIO_B_VIRT, GPIO_MASK) = 0x0;
200 CPU_REG (GPIO_C_VIRT, GPIO_MASK) = 0x0;
201 CPU_REG (GPIO_D_VIRT, GPIO_MASK) = 0x0;
203 /* Initialize global IRQ's, fast path */
204 for (irq = 0; irq < NR_GLBL_IRQS; irq++) {
205 set_irq_chip(irq, &h720x_global_chip);
206 set_irq_handler(irq, do_level_IRQ);
207 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
210 /* Initialize multiplexed IRQ's, slow path */
211 for (irq = IRQ_CHAINED_GPIOA(0) ; irq <= IRQ_CHAINED_GPIOD(31); irq++) {
212 set_irq_chip(irq, &h720x_gpio_chip);
213 set_irq_handler(irq, do_edge_IRQ);
214 set_irq_flags(irq, IRQF_VALID );
216 set_irq_chained_handler(IRQ_GPIOA, h720x_gpioa_demux_handler);
217 set_irq_chained_handler(IRQ_GPIOB, h720x_gpiob_demux_handler);
218 set_irq_chained_handler(IRQ_GPIOC, h720x_gpioc_demux_handler);
219 set_irq_chained_handler(IRQ_GPIOD, h720x_gpiod_demux_handler);
221 #ifdef CONFIG_CPU_H7202
222 for (irq = IRQ_CHAINED_GPIOE(0) ; irq <= IRQ_CHAINED_GPIOE(31); irq++) {
223 set_irq_chip(irq, &h720x_gpio_chip);
224 set_irq_handler(irq, do_edge_IRQ);
225 set_irq_flags(irq, IRQF_VALID );
227 set_irq_chained_handler(IRQ_GPIOE, h720x_gpioe_demux_handler);
230 /* Enable multiplexed irq's */
231 CPU_REG (IRQC_VIRT, IRQC_IER) = IRQ_ENA_MUX;
234 static struct map_desc h720x_io_desc[] __initdata = {
237 .pfn = __phys_to_pfn(IO_PHYS),
243 /* Initialize io tables */
244 void __init h720x_map_io(void)
246 iotable_init(h720x_io_desc,ARRAY_SIZE(h720x_io_desc));