/* * arch/arm/mach-netx/generic.c * * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/device.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/irqchip/arm-vic.h> #include <linux/reboot.h> #include <mach/hardware.h> #include <asm/mach/map.h> #include <mach/netx-regs.h> #include <asm/mach/irq.h> static struct map_desc netx_io_desc[] __initdata = { { .virtual = NETX_IO_VIRT, .pfn = __phys_to_pfn(NETX_IO_PHYS), .length = NETX_IO_SIZE, .type = MT_DEVICE } }; void __init netx_map_io(void) { iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc)); } static struct resource netx_rtc_resources[] = { [0] = { .start = 0x00101200, .end = 0x00101220, .flags = IORESOURCE_MEM, }, }; static struct platform_device netx_rtc_device = { .name = "netx-rtc", .id = 0, .num_resources = ARRAY_SIZE(netx_rtc_resources), .resource = netx_rtc_resources, }; static struct platform_device *devices[] __initdata = { &netx_rtc_device, }; #if 0 #define DEBUG_IRQ(fmt...) printk(fmt) #else #define DEBUG_IRQ(fmt...) while (0) {} #endif static void netx_hif_demux_handler(struct irq_desc *desc) { unsigned int irq = NETX_IRQ_HIF_CHAINED(0); unsigned int stat; stat = ((readl(NETX_DPMAS_INT_EN) & readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f; while (stat) { if (stat & 1) { DEBUG_IRQ("handling irq %d\n", irq); generic_handle_irq(irq); } irq++; stat >>= 1; } } static int netx_hif_irq_type(struct irq_data *d, unsigned int type) { unsigned int val, irq; val = readl(NETX_DPMAS_IF_CONF1); irq = d->irq - NETX_IRQ_HIF_CHAINED(0); if (type & IRQ_TYPE_EDGE_RISING) { DEBUG_IRQ("rising edges\n"); val |= (1 << 26) << irq; } if (type & IRQ_TYPE_EDGE_FALLING) { DEBUG_IRQ("falling edges\n"); val &= ~((1 << 26) << irq); } if (type & IRQ_TYPE_LEVEL_LOW) { DEBUG_IRQ("low level\n"); val &= ~((1 << 26) << irq); } if (type & IRQ_TYPE_LEVEL_HIGH) { DEBUG_IRQ("high level\n"); val |= (1 << 26) << irq; } writel(val, NETX_DPMAS_IF_CONF1); return 0; } static void netx_hif_ack_irq(struct irq_data *d) { unsigned int val, irq; irq = d->irq - NETX_IRQ_HIF_CHAINED(0); writel((1 << 24) << irq, NETX_DPMAS_INT_STAT); val = readl(NETX_DPMAS_INT_EN); val &= ~((1 << 24) << irq); writel(val, NETX_DPMAS_INT_EN); DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); } static void netx_hif_mask_irq(struct irq_data *d) { unsigned int val, irq; irq = d->irq - NETX_IRQ_HIF_CHAINED(0); val = readl(NETX_DPMAS_INT_EN); val &= ~((1 << 24) << irq); writel(val, NETX_DPMAS_INT_EN); DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); } static void netx_hif_unmask_irq(struct irq_data *d) { unsigned int val, irq; irq = d->irq - NETX_IRQ_HIF_CHAINED(0); val = readl(NETX_DPMAS_INT_EN); val |= (1 << 24) << irq; writel(val, NETX_DPMAS_INT_EN); DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); } static struct irq_chip netx_hif_chip = { .irq_ack = netx_hif_ack_irq, .irq_mask = netx_hif_mask_irq, .irq_unmask = netx_hif_unmask_irq, .irq_set_type = netx_hif_irq_type, }; void __init netx_init_irq(void) { int irq; vic_init(io_p2v(NETX_PA_VIC), NETX_IRQ_VIC_START, ~0, 0); for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) { irq_set_chip_and_handler(irq, &netx_hif_chip, handle_level_irq); irq_clear_status_flags(irq, IRQ_NOREQUEST); } writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN); irq_set_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler); } static int __init netx_init(void) { return platform_add_devices(devices, ARRAY_SIZE(devices)); } subsys_initcall(netx_init); void netx_restart(enum reboot_mode mode, const char *cmd) { writel(NETX_SYSTEM_RES_CR_FIRMW_RES_EN | NETX_SYSTEM_RES_CR_FIRMW_RES, NETX_SYSTEM_RES_CR); }