2 * linux/arch/arm/mach-integrator/core.c
4 * Copyright (C) 2000-2003 Deep Blue Solutions Ltd
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2, as
8 * published by the Free Software Foundation.
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/export.h>
15 #include <linux/spinlock.h>
16 #include <linux/interrupt.h>
17 #include <linux/irq.h>
18 #include <linux/memblock.h>
19 #include <linux/sched.h>
20 #include <linux/smp.h>
21 #include <linux/amba/bus.h>
22 #include <linux/amba/serial.h>
24 #include <linux/stat.h>
26 #include <mach/hardware.h>
27 #include <mach/platform.h>
29 #include <mach/irqs.h>
31 #include <asm/mach-types.h>
32 #include <asm/mach/time.h>
33 #include <asm/pgtable.h>
39 #define INTEGRATOR_RTC_IRQ { IRQ_RTCINT }
40 #define INTEGRATOR_UART0_IRQ { IRQ_UARTINT0 }
41 #define INTEGRATOR_UART1_IRQ { IRQ_UARTINT1 }
42 #define KMI0_IRQ { IRQ_KMIINT0 }
43 #define KMI1_IRQ { IRQ_KMIINT1 }
45 static AMBA_APB_DEVICE(rtc
, "rtc", 0,
46 INTEGRATOR_RTC_BASE
, INTEGRATOR_RTC_IRQ
, NULL
);
48 static AMBA_APB_DEVICE(uart0
, "uart0", 0,
49 INTEGRATOR_UART0_BASE
, INTEGRATOR_UART0_IRQ
, NULL
);
51 static AMBA_APB_DEVICE(uart1
, "uart1", 0,
52 INTEGRATOR_UART1_BASE
, INTEGRATOR_UART1_IRQ
, NULL
);
54 static AMBA_APB_DEVICE(kmi0
, "kmi0", 0, KMI0_BASE
, KMI0_IRQ
, NULL
);
55 static AMBA_APB_DEVICE(kmi1
, "kmi1", 0, KMI1_BASE
, KMI1_IRQ
, NULL
);
57 static struct amba_device
*amba_devs
[] __initdata
= {
65 int __init
integrator_init(bool is_cp
)
70 * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to
71 * hard-code them. The Integator/CP and forward have proper cell IDs.
72 * Else we leave them undefined to the bus driver can autoprobe them.
74 if (!is_cp
&& IS_ENABLED(CONFIG_ARCH_INTEGRATOR_AP
)) {
75 rtc_device
.periphid
= 0x00041030;
76 uart0_device
.periphid
= 0x00041010;
77 uart1_device
.periphid
= 0x00041010;
78 kmi0_device
.periphid
= 0x00041050;
79 kmi1_device
.periphid
= 0x00041050;
80 uart0_device
.dev
.platform_data
= &ap_uart_data
;
81 uart1_device
.dev
.platform_data
= &ap_uart_data
;
84 for (i
= 0; i
< ARRAY_SIZE(amba_devs
); i
++) {
85 struct amba_device
*d
= amba_devs
[i
];
86 amba_device_register(d
, &iomem_resource
);
94 static DEFINE_RAW_SPINLOCK(cm_lock
);
97 * cm_control - update the CM_CTRL register.
98 * @mask: bits to change
101 void cm_control(u32 mask
, u32 set
)
106 raw_spin_lock_irqsave(&cm_lock
, flags
);
107 val
= readl(CM_CTRL
) & ~mask
;
108 writel(val
| set
, CM_CTRL
);
109 raw_spin_unlock_irqrestore(&cm_lock
, flags
);
112 EXPORT_SYMBOL(cm_control
);
115 * We need to stop things allocating the low memory; ideally we need a
116 * better implementation of GFP_DMA which does not assume that DMA-able
117 * memory starts at zero.
119 void __init
integrator_reserve(void)
121 memblock_reserve(PHYS_OFFSET
, __pa(swapper_pg_dir
) - PHYS_OFFSET
);
125 * To reset, we hit the on-board reset register in the system FPGA
127 void integrator_restart(char mode
, const char *cmd
)
129 cm_control(CM_CTRL_RESET
, CM_CTRL_RESET
);
132 static u32 integrator_id
;
134 static ssize_t
intcp_get_manf(struct device
*dev
,
135 struct device_attribute
*attr
,
138 return sprintf(buf
, "%02x\n", integrator_id
>> 24);
141 static struct device_attribute intcp_manf_attr
=
142 __ATTR(manufacturer
, S_IRUGO
, intcp_get_manf
, NULL
);
144 static ssize_t
intcp_get_arch(struct device
*dev
,
145 struct device_attribute
*attr
,
150 switch ((integrator_id
>> 16) & 0xff) {
152 arch
= "ASB little-endian";
155 arch
= "AHB little-endian";
158 arch
= "AHB-Lite system bus, bi-endian";
168 return sprintf(buf
, "%s\n", arch
);
171 static struct device_attribute intcp_arch_attr
=
172 __ATTR(architecture
, S_IRUGO
, intcp_get_arch
, NULL
);
174 static ssize_t
intcp_get_fpga(struct device
*dev
,
175 struct device_attribute
*attr
,
180 switch ((integrator_id
>> 12) & 0xf) {
188 fpga
= "EPM7256AE (Altera PLD)";
195 return sprintf(buf
, "%s\n", fpga
);
198 static struct device_attribute intcp_fpga_attr
=
199 __ATTR(fpga
, S_IRUGO
, intcp_get_fpga
, NULL
);
201 static ssize_t
intcp_get_build(struct device
*dev
,
202 struct device_attribute
*attr
,
205 return sprintf(buf
, "%02x\n", (integrator_id
>> 4) & 0xFF);
208 static struct device_attribute intcp_build_attr
=
209 __ATTR(build
, S_IRUGO
, intcp_get_build
, NULL
);
213 void integrator_init_sysfs(struct device
*parent
, u32 id
)
216 device_create_file(parent
, &intcp_manf_attr
);
217 device_create_file(parent
, &intcp_arch_attr
);
218 device_create_file(parent
, &intcp_fpga_attr
);
219 device_create_file(parent
, &intcp_build_attr
);