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>
24 #include <linux/clkdev.h>
26 #include <mach/hardware.h>
27 #include <mach/platform.h>
30 #include <asm/system.h>
32 #include <asm/mach/time.h>
33 #include <asm/pgtable.h>
35 static struct amba_pl010_data integrator_uart_data;
37 static struct amba_device rtc_device = {
42 .start = INTEGRATOR_RTC_BASE,
43 .end = INTEGRATOR_RTC_BASE + SZ_4K - 1,
44 .flags = IORESOURCE_MEM,
46 .irq = { IRQ_RTCINT, NO_IRQ },
47 .periphid = 0x00041030,
50 static struct amba_device uart0_device = {
53 .platform_data = &integrator_uart_data,
56 .start = INTEGRATOR_UART0_BASE,
57 .end = INTEGRATOR_UART0_BASE + SZ_4K - 1,
58 .flags = IORESOURCE_MEM,
60 .irq = { IRQ_UARTINT0, NO_IRQ },
61 .periphid = 0x0041010,
64 static struct amba_device uart1_device = {
67 .platform_data = &integrator_uart_data,
70 .start = INTEGRATOR_UART1_BASE,
71 .end = INTEGRATOR_UART1_BASE + SZ_4K - 1,
72 .flags = IORESOURCE_MEM,
74 .irq = { IRQ_UARTINT1, NO_IRQ },
75 .periphid = 0x0041010,
78 static struct amba_device kmi0_device = {
84 .end = KMI0_BASE + SZ_4K - 1,
85 .flags = IORESOURCE_MEM,
87 .irq = { IRQ_KMIINT0, NO_IRQ },
88 .periphid = 0x00041050,
91 static struct amba_device kmi1_device = {
97 .end = KMI1_BASE + SZ_4K - 1,
98 .flags = IORESOURCE_MEM,
100 .irq = { IRQ_KMIINT1, NO_IRQ },
101 .periphid = 0x00041050,
104 static struct amba_device *amba_devs[] __initdata = {
113 * These are fixed clocks.
115 static struct clk clk24mhz = {
119 static struct clk uartclk = {
123 static struct clk dummy_apb_pclk;
125 static struct clk_lookup lookups[] = {
127 .con_id = "apb_pclk",
128 .clk = &dummy_apb_pclk,
130 /* Integrator/AP timer frequency */
131 .dev_id = "ap_timer",
145 }, { /* MMCI - IntegratorCP */
151 void __init integrator_init_early(void)
153 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
156 static int __init integrator_init(void)
160 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
161 struct amba_device *d = amba_devs[i];
162 amba_device_register(d, &iomem_resource);
168 arch_initcall(integrator_init);
171 * On the Integrator platform, the port RTS and DTR are provided by
172 * bits in the following SC_CTRLS register bits:
177 #define SC_CTRLC IO_ADDRESS(INTEGRATOR_SC_CTRLC)
178 #define SC_CTRLS IO_ADDRESS(INTEGRATOR_SC_CTRLS)
180 static void integrator_uart_set_mctrl(struct amba_device *dev, void __iomem *base, unsigned int mctrl)
182 unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
184 if (dev == &uart0_device) {
192 if (mctrl & TIOCM_RTS)
197 if (mctrl & TIOCM_DTR)
202 __raw_writel(ctrls, SC_CTRLS);
203 __raw_writel(ctrlc, SC_CTRLC);
206 static struct amba_pl010_data integrator_uart_data = {
207 .set_mctrl = integrator_uart_set_mctrl,
210 #define CM_CTRL IO_ADDRESS(INTEGRATOR_HDR_CTRL)
212 static DEFINE_RAW_SPINLOCK(cm_lock);
215 * cm_control - update the CM_CTRL register.
216 * @mask: bits to change
219 void cm_control(u32 mask, u32 set)
224 raw_spin_lock_irqsave(&cm_lock, flags);
225 val = readl(CM_CTRL) & ~mask;
226 writel(val | set, CM_CTRL);
227 raw_spin_unlock_irqrestore(&cm_lock, flags);
230 EXPORT_SYMBOL(cm_control);
233 * We need to stop things allocating the low memory; ideally we need a
234 * better implementation of GFP_DMA which does not assume that DMA-able
235 * memory starts at zero.
237 void __init integrator_reserve(void)
239 memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);