| /* |
| * linux/arch/sh/boards/se/7343/irq.c |
| * |
| * Copyright (C) 2008 Yoshihiro Shimoda |
| * |
| * Based on linux/arch/sh/boards/se/7722/irq.c |
| * Copyright (C) 2007 Nobuhiro Iwamatsu |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| #include <linux/init.h> |
| #include <linux/irq.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <mach-se/mach/se7343.h> |
| |
| unsigned int se7343_fpga_irq[SE7343_FPGA_IRQ_NR] = { 0, }; |
| |
| static void disable_se7343_irq(struct irq_data *data) |
| { |
| unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data); |
| __raw_writew(__raw_readw(PA_CPLD_IMSK) | 1 << bit, PA_CPLD_IMSK); |
| } |
| |
| static void enable_se7343_irq(struct irq_data *data) |
| { |
| unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data); |
| __raw_writew(__raw_readw(PA_CPLD_IMSK) & ~(1 << bit), PA_CPLD_IMSK); |
| } |
| |
| static struct irq_chip se7343_irq_chip __read_mostly = { |
| .name = "SE7343-FPGA", |
| .irq_mask = disable_se7343_irq, |
| .irq_unmask = enable_se7343_irq, |
| }; |
| |
| static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc) |
| { |
| unsigned short intv = __raw_readw(PA_CPLD_ST); |
| unsigned int ext_irq = 0; |
| |
| intv &= (1 << SE7343_FPGA_IRQ_NR) - 1; |
| |
| for (; intv; intv >>= 1, ext_irq++) { |
| if (!(intv & 1)) |
| continue; |
| |
| generic_handle_irq(se7343_fpga_irq[ext_irq]); |
| } |
| } |
| |
| /* |
| * Initialize IRQ setting |
| */ |
| void __init init_7343se_IRQ(void) |
| { |
| int i, irq; |
| |
| __raw_writew(0, PA_CPLD_IMSK); /* disable all irqs */ |
| __raw_writew(0x2000, 0xb03fffec); /* mrshpc irq enable */ |
| |
| for (i = 0; i < SE7343_FPGA_IRQ_NR; i++) { |
| irq = create_irq(); |
| if (irq < 0) |
| return; |
| se7343_fpga_irq[i] = irq; |
| |
| set_irq_chip_and_handler_name(se7343_fpga_irq[i], |
| &se7343_irq_chip, |
| handle_level_irq, "level"); |
| |
| set_irq_chip_data(se7343_fpga_irq[i], (void *)i); |
| } |
| |
| set_irq_chained_handler(IRQ0_IRQ, se7343_irq_demux); |
| set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW); |
| set_irq_chained_handler(IRQ1_IRQ, se7343_irq_demux); |
| set_irq_type(IRQ1_IRQ, IRQ_TYPE_LEVEL_LOW); |
| set_irq_chained_handler(IRQ4_IRQ, se7343_irq_demux); |
| set_irq_type(IRQ4_IRQ, IRQ_TYPE_LEVEL_LOW); |
| set_irq_chained_handler(IRQ5_IRQ, se7343_irq_demux); |
| set_irq_type(IRQ5_IRQ, IRQ_TYPE_LEVEL_LOW); |
| } |