diff options
Diffstat (limited to 'kernel/arch/arm/mach-netx/generic.c')
| -rw-r--r-- | kernel/arch/arm/mach-netx/generic.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-netx/generic.c b/kernel/arch/arm/mach-netx/generic.c new file mode 100644 index 000000000..db25b0cef --- /dev/null +++ b/kernel/arch/arm/mach-netx/generic.c @@ -0,0 +1,195 @@ +/* + * 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(unsigned int irq_unused, 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); + set_irq_flags(irq, IRQF_VALID); + } + + 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); +} |