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 <mach/hardware.h>
26 #include <mach/platform.h>
28 #include <mach/irqs.h>
30 #include <asm/mach-types.h>
31 #include <asm/mach/time.h>
32 #include <asm/pgtable.h>
34 static struct amba_pl010_data integrator_uart_data;
36 #define INTEGRATOR_RTC_IRQ { IRQ_RTCINT }
37 #define INTEGRATOR_UART0_IRQ { IRQ_UARTINT0 }
38 #define INTEGRATOR_UART1_IRQ { IRQ_UARTINT1 }
39 #define KMI0_IRQ { IRQ_KMIINT0 }
40 #define KMI1_IRQ { IRQ_KMIINT1 }
42 static AMBA_APB_DEVICE(rtc, "rtc", 0,
43 INTEGRATOR_RTC_BASE, INTEGRATOR_RTC_IRQ, NULL);
45 static AMBA_APB_DEVICE(uart0, "uart0", 0,
46 INTEGRATOR_UART0_BASE, INTEGRATOR_UART0_IRQ, &integrator_uart_data);
48 static AMBA_APB_DEVICE(uart1, "uart1", 0,
49 INTEGRATOR_UART1_BASE, INTEGRATOR_UART1_IRQ, &integrator_uart_data);
51 static AMBA_APB_DEVICE(kmi0, "kmi0", 0, KMI0_BASE, KMI0_IRQ, NULL);
52 static AMBA_APB_DEVICE(kmi1, "kmi1", 0, KMI1_BASE, KMI1_IRQ, NULL);
54 static struct amba_device *amba_devs[] __initdata = {
62 static int __init integrator_init(void)
67 * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to
68 * hard-code them. The Integator/CP and forward have proper cell IDs.
69 * Else we leave them undefined to the bus driver can autoprobe them.
71 if (machine_is_integrator()) {
72 rtc_device.periphid = 0x00041030;
73 uart0_device.periphid = 0x00041010;
74 uart1_device.periphid = 0x00041010;
75 kmi0_device.periphid = 0x00041050;
76 kmi1_device.periphid = 0x00041050;
79 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
80 struct amba_device *d = amba_devs[i];
81 amba_device_register(d, &iomem_resource);
87 arch_initcall(integrator_init);
90 * On the Integrator platform, the port RTS and DTR are provided by
91 * bits in the following SC_CTRLS register bits:
96 #define SC_CTRLC IO_ADDRESS(INTEGRATOR_SC_CTRLC)
97 #define SC_CTRLS IO_ADDRESS(INTEGRATOR_SC_CTRLS)
99 static void integrator_uart_set_mctrl(struct amba_device *dev, void __iomem *base, unsigned int mctrl)
101 unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
103 if (dev == &uart0_device) {
111 if (mctrl & TIOCM_RTS)
116 if (mctrl & TIOCM_DTR)
121 __raw_writel(ctrls, SC_CTRLS);
122 __raw_writel(ctrlc, SC_CTRLC);
125 static struct amba_pl010_data integrator_uart_data = {
126 .set_mctrl = integrator_uart_set_mctrl,
129 static DEFINE_RAW_SPINLOCK(cm_lock);
132 * cm_control - update the CM_CTRL register.
133 * @mask: bits to change
136 void cm_control(u32 mask, u32 set)
141 raw_spin_lock_irqsave(&cm_lock, flags);
142 val = readl(CM_CTRL) & ~mask;
143 writel(val | set, CM_CTRL);
144 raw_spin_unlock_irqrestore(&cm_lock, flags);
147 EXPORT_SYMBOL(cm_control);
150 * We need to stop things allocating the low memory; ideally we need a
151 * better implementation of GFP_DMA which does not assume that DMA-able
152 * memory starts at zero.
154 void __init integrator_reserve(void)
156 memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
160 * To reset, we hit the on-board reset register in the system FPGA
162 void integrator_restart(char mode, const char *cmd)
164 cm_control(CM_CTRL_RESET, CM_CTRL_RESET);