| /* |
| * linux/arch/arm/mach-integrator/core.c |
| * |
| * Copyright (C) 2000-2003 Deep Blue Solutions Ltd |
| * |
| * 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/types.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/export.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/memblock.h> |
| #include <linux/sched.h> |
| #include <linux/smp.h> |
| #include <linux/amba/bus.h> |
| #include <linux/amba/serial.h> |
| #include <linux/io.h> |
| #include <linux/stat.h> |
| |
| #include <mach/hardware.h> |
| #include <mach/platform.h> |
| #include <mach/cm.h> |
| #include <mach/irqs.h> |
| |
| #include <asm/mach-types.h> |
| #include <asm/mach/time.h> |
| #include <asm/pgtable.h> |
| |
| #include "common.h" |
| |
| #ifdef CONFIG_ATAGS |
| |
| #define INTEGRATOR_RTC_IRQ { IRQ_RTCINT } |
| #define INTEGRATOR_UART0_IRQ { IRQ_UARTINT0 } |
| #define INTEGRATOR_UART1_IRQ { IRQ_UARTINT1 } |
| #define KMI0_IRQ { IRQ_KMIINT0 } |
| #define KMI1_IRQ { IRQ_KMIINT1 } |
| |
| static AMBA_APB_DEVICE(rtc, "rtc", 0, |
| INTEGRATOR_RTC_BASE, INTEGRATOR_RTC_IRQ, NULL); |
| |
| static AMBA_APB_DEVICE(uart0, "uart0", 0, |
| INTEGRATOR_UART0_BASE, INTEGRATOR_UART0_IRQ, NULL); |
| |
| static AMBA_APB_DEVICE(uart1, "uart1", 0, |
| INTEGRATOR_UART1_BASE, INTEGRATOR_UART1_IRQ, NULL); |
| |
| static AMBA_APB_DEVICE(kmi0, "kmi0", 0, KMI0_BASE, KMI0_IRQ, NULL); |
| static AMBA_APB_DEVICE(kmi1, "kmi1", 0, KMI1_BASE, KMI1_IRQ, NULL); |
| |
| static struct amba_device *amba_devs[] __initdata = { |
| &rtc_device, |
| &uart0_device, |
| &uart1_device, |
| &kmi0_device, |
| &kmi1_device, |
| }; |
| |
| int __init integrator_init(bool is_cp) |
| { |
| int i; |
| |
| /* |
| * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to |
| * hard-code them. The Integator/CP and forward have proper cell IDs. |
| * Else we leave them undefined to the bus driver can autoprobe them. |
| */ |
| if (!is_cp) { |
| rtc_device.periphid = 0x00041030; |
| uart0_device.periphid = 0x00041010; |
| uart1_device.periphid = 0x00041010; |
| kmi0_device.periphid = 0x00041050; |
| kmi1_device.periphid = 0x00041050; |
| uart0_device.dev.platform_data = &ap_uart_data; |
| uart1_device.dev.platform_data = &ap_uart_data; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { |
| struct amba_device *d = amba_devs[i]; |
| amba_device_register(d, &iomem_resource); |
| } |
| |
| return 0; |
| } |
| |
| #endif |
| |
| static DEFINE_RAW_SPINLOCK(cm_lock); |
| |
| /** |
| * cm_control - update the CM_CTRL register. |
| * @mask: bits to change |
| * @set: bits to set |
| */ |
| void cm_control(u32 mask, u32 set) |
| { |
| unsigned long flags; |
| u32 val; |
| |
| raw_spin_lock_irqsave(&cm_lock, flags); |
| val = readl(CM_CTRL) & ~mask; |
| writel(val | set, CM_CTRL); |
| raw_spin_unlock_irqrestore(&cm_lock, flags); |
| } |
| |
| EXPORT_SYMBOL(cm_control); |
| |
| /* |
| * We need to stop things allocating the low memory; ideally we need a |
| * better implementation of GFP_DMA which does not assume that DMA-able |
| * memory starts at zero. |
| */ |
| void __init integrator_reserve(void) |
| { |
| memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET); |
| } |
| |
| /* |
| * To reset, we hit the on-board reset register in the system FPGA |
| */ |
| void integrator_restart(char mode, const char *cmd) |
| { |
| cm_control(CM_CTRL_RESET, CM_CTRL_RESET); |
| } |
| |
| static u32 integrator_id; |
| |
| static ssize_t intcp_get_manf(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%02x\n", integrator_id >> 24); |
| } |
| |
| static struct device_attribute intcp_manf_attr = |
| __ATTR(manufacturer, S_IRUGO, intcp_get_manf, NULL); |
| |
| static ssize_t intcp_get_arch(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| const char *arch; |
| |
| switch ((integrator_id >> 16) & 0xff) { |
| case 0x00: |
| arch = "ASB little-endian"; |
| break; |
| case 0x01: |
| arch = "AHB little-endian"; |
| break; |
| case 0x03: |
| arch = "AHB-Lite system bus, bi-endian"; |
| break; |
| case 0x04: |
| arch = "AHB"; |
| break; |
| default: |
| arch = "Unknown"; |
| break; |
| } |
| |
| return sprintf(buf, "%s\n", arch); |
| } |
| |
| static struct device_attribute intcp_arch_attr = |
| __ATTR(architecture, S_IRUGO, intcp_get_arch, NULL); |
| |
| static ssize_t intcp_get_fpga(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| const char *fpga; |
| |
| switch ((integrator_id >> 12) & 0xf) { |
| case 0x01: |
| fpga = "XC4062"; |
| break; |
| case 0x02: |
| fpga = "XC4085"; |
| break; |
| case 0x04: |
| fpga = "EPM7256AE (Altera PLD)"; |
| break; |
| default: |
| fpga = "Unknown"; |
| break; |
| } |
| |
| return sprintf(buf, "%s\n", fpga); |
| } |
| |
| static struct device_attribute intcp_fpga_attr = |
| __ATTR(fpga, S_IRUGO, intcp_get_fpga, NULL); |
| |
| static ssize_t intcp_get_build(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%02x\n", (integrator_id >> 4) & 0xFF); |
| } |
| |
| static struct device_attribute intcp_build_attr = |
| __ATTR(build, S_IRUGO, intcp_get_build, NULL); |
| |
| |
| |
| void integrator_init_sysfs(struct device *parent, u32 id) |
| { |
| integrator_id = id; |
| device_create_file(parent, &intcp_manf_attr); |
| device_create_file(parent, &intcp_arch_attr); |
| device_create_file(parent, &intcp_fpga_attr); |
| device_create_file(parent, &intcp_build_attr); |
| } |