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/spinlock.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/memblock.h>
18 #include <linux/sched.h>
19 #include <linux/smp.h>
20 #include <linux/termios.h>
21 #include <linux/amba/bus.h>
22 #include <linux/amba/serial.h>
25 #include <asm/clkdev.h>
26 #include <mach/clkdev.h>
27 #include <mach/hardware.h>
28 #include <mach/platform.h>
31 #include <asm/system.h>
33 #include <asm/mach/time.h>
34 #include <asm/pgtable.h>
36 static struct amba_pl010_data integrator_uart_data
;
38 static struct amba_device rtc_device
= {
43 .start
= INTEGRATOR_RTC_BASE
,
44 .end
= INTEGRATOR_RTC_BASE
+ SZ_4K
- 1,
45 .flags
= IORESOURCE_MEM
,
47 .irq
= { IRQ_RTCINT
, NO_IRQ
},
48 .periphid
= 0x00041030,
51 static struct amba_device uart0_device
= {
54 .platform_data
= &integrator_uart_data
,
57 .start
= INTEGRATOR_UART0_BASE
,
58 .end
= INTEGRATOR_UART0_BASE
+ SZ_4K
- 1,
59 .flags
= IORESOURCE_MEM
,
61 .irq
= { IRQ_UARTINT0
, NO_IRQ
},
62 .periphid
= 0x0041010,
65 static struct amba_device uart1_device
= {
68 .platform_data
= &integrator_uart_data
,
71 .start
= INTEGRATOR_UART1_BASE
,
72 .end
= INTEGRATOR_UART1_BASE
+ SZ_4K
- 1,
73 .flags
= IORESOURCE_MEM
,
75 .irq
= { IRQ_UARTINT1
, NO_IRQ
},
76 .periphid
= 0x0041010,
79 static struct amba_device kmi0_device
= {
85 .end
= KMI0_BASE
+ SZ_4K
- 1,
86 .flags
= IORESOURCE_MEM
,
88 .irq
= { IRQ_KMIINT0
, NO_IRQ
},
89 .periphid
= 0x00041050,
92 static struct amba_device kmi1_device
= {
98 .end
= KMI1_BASE
+ SZ_4K
- 1,
99 .flags
= IORESOURCE_MEM
,
101 .irq
= { IRQ_KMIINT1
, NO_IRQ
},
102 .periphid
= 0x00041050,
105 static struct amba_device
*amba_devs
[] __initdata
= {
114 * These are fixed clocks.
116 static struct clk clk24mhz
= {
120 static struct clk uartclk
= {
124 static struct clk_lookup lookups
[] = {
137 }, { /* MMCI - IntegratorCP */
143 static int __init
integrator_init(void)
147 clkdev_add_table(lookups
, ARRAY_SIZE(lookups
));
149 for (i
= 0; i
< ARRAY_SIZE(amba_devs
); i
++) {
150 struct amba_device
*d
= amba_devs
[i
];
151 amba_device_register(d
, &iomem_resource
);
157 arch_initcall(integrator_init
);
160 * On the Integrator platform, the port RTS and DTR are provided by
161 * bits in the following SC_CTRLS register bits:
166 #define SC_CTRLC IO_ADDRESS(INTEGRATOR_SC_CTRLC)
167 #define SC_CTRLS IO_ADDRESS(INTEGRATOR_SC_CTRLS)
169 static void integrator_uart_set_mctrl(struct amba_device
*dev
, void __iomem
*base
, unsigned int mctrl
)
171 unsigned int ctrls
= 0, ctrlc
= 0, rts_mask
, dtr_mask
;
173 if (dev
== &uart0_device
) {
181 if (mctrl
& TIOCM_RTS
)
186 if (mctrl
& TIOCM_DTR
)
191 __raw_writel(ctrls
, SC_CTRLS
);
192 __raw_writel(ctrlc
, SC_CTRLC
);
195 static struct amba_pl010_data integrator_uart_data
= {
196 .set_mctrl
= integrator_uart_set_mctrl
,
199 #define CM_CTRL IO_ADDRESS(INTEGRATOR_HDR_CTRL)
201 static DEFINE_SPINLOCK(cm_lock
);
204 * cm_control - update the CM_CTRL register.
205 * @mask: bits to change
208 void cm_control(u32 mask
, u32 set
)
213 spin_lock_irqsave(&cm_lock
, flags
);
214 val
= readl(CM_CTRL
) & ~mask
;
215 writel(val
| set
, CM_CTRL
);
216 spin_unlock_irqrestore(&cm_lock
, flags
);
219 EXPORT_SYMBOL(cm_control
);
222 * We need to stop things allocating the low memory; ideally we need a
223 * better implementation of GFP_DMA which does not assume that DMA-able
224 * memory starts at zero.
226 void __init
integrator_reserve(void)
228 memblock_reserve(PHYS_OFFSET
, __pa(swapper_pg_dir
) - PHYS_OFFSET
);