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Diffstat (limited to 'arch/arm/mach-integrator/core.c')
| -rw-r--r-- | arch/arm/mach-integrator/core.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/arch/arm/mach-integrator/core.c b/arch/arm/mach-integrator/core.c new file mode 100644 index 00000000..81461d21 --- /dev/null +++ b/arch/arm/mach-integrator/core.c @@ -0,0 +1,220 @@ +/* + * 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 && IS_ENABLED(CONFIG_ARCH_INTEGRATOR_AP)) { + 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); +} |