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-types.h>
33 #include <asm/mach/time.h>
34 #include <asm/pgtable.h>
36 static struct amba_pl010_data integrator_uart_data;
38 #define INTEGRATOR_RTC_IRQ { IRQ_RTCINT }
39 #define INTEGRATOR_UART0_IRQ { IRQ_UARTINT0 }
40 #define INTEGRATOR_UART1_IRQ { IRQ_UARTINT1 }
41 #define KMI0_IRQ { IRQ_KMIINT0 }
42 #define KMI1_IRQ { IRQ_KMIINT1 }
44 static AMBA_APB_DEVICE(rtc, "mb:15", 0,
45 INTEGRATOR_RTC_BASE, INTEGRATOR_RTC_IRQ, NULL);
47 static AMBA_APB_DEVICE(uart0, "mb:16", 0,
48 INTEGRATOR_UART0_BASE, INTEGRATOR_UART0_IRQ, &integrator_uart_data);
50 static AMBA_APB_DEVICE(uart1, "mb:17", 0,
51 INTEGRATOR_UART1_BASE, INTEGRATOR_UART1_IRQ, &integrator_uart_data);
53 static AMBA_APB_DEVICE(kmi0, "mb:18", 0, KMI0_BASE, KMI0_IRQ, NULL);
54 static AMBA_APB_DEVICE(kmi1, "mb:19", 0, KMI1_BASE, KMI1_IRQ, NULL);
56 static struct amba_device *amba_devs[] __initdata = {
65 * These are fixed clocks.
67 static struct clk clk24mhz = {
71 static struct clk uartclk = {
75 static struct clk dummy_apb_pclk;
77 static struct clk_lookup lookups[] = {
80 .clk = &dummy_apb_pclk,
82 /* Integrator/AP timer frequency */
97 }, { /* MMCI - IntegratorCP */
103 void __init integrator_init_early(void)
105 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
108 static int __init integrator_init(void)
113 * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to
114 * hard-code them. The Integator/CP and forward have proper cell IDs.
115 * Else we leave them undefined to the bus driver can autoprobe them.
117 if (machine_is_integrator()) {
118 rtc_device.periphid = 0x00041030;
119 uart0_device.periphid = 0x00041010;
120 uart1_device.periphid = 0x00041010;
121 kmi0_device.periphid = 0x00041050;
122 kmi1_device.periphid = 0x00041050;
125 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
126 struct amba_device *d = amba_devs[i];
127 amba_device_register(d, &iomem_resource);
133 arch_initcall(integrator_init);
136 * On the Integrator platform, the port RTS and DTR are provided by
137 * bits in the following SC_CTRLS register bits:
142 #define SC_CTRLC IO_ADDRESS(INTEGRATOR_SC_CTRLC)
143 #define SC_CTRLS IO_ADDRESS(INTEGRATOR_SC_CTRLS)
145 static void integrator_uart_set_mctrl(struct amba_device *dev, void __iomem *base, unsigned int mctrl)
147 unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
149 if (dev == &uart0_device) {
157 if (mctrl & TIOCM_RTS)
162 if (mctrl & TIOCM_DTR)
167 __raw_writel(ctrls, SC_CTRLS);
168 __raw_writel(ctrlc, SC_CTRLC);
171 static struct amba_pl010_data integrator_uart_data = {
172 .set_mctrl = integrator_uart_set_mctrl,
175 #define CM_CTRL IO_ADDRESS(INTEGRATOR_HDR_CTRL)
177 static DEFINE_RAW_SPINLOCK(cm_lock);
180 * cm_control - update the CM_CTRL register.
181 * @mask: bits to change
184 void cm_control(u32 mask, u32 set)
189 raw_spin_lock_irqsave(&cm_lock, flags);
190 val = readl(CM_CTRL) & ~mask;
191 writel(val | set, CM_CTRL);
192 raw_spin_unlock_irqrestore(&cm_lock, flags);
195 EXPORT_SYMBOL(cm_control);
198 * We need to stop things allocating the low memory; ideally we need a
199 * better implementation of GFP_DMA which does not assume that DMA-able
200 * memory starts at zero.
202 void __init integrator_reserve(void)
204 memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
208 * To reset, we hit the on-board reset register in the system FPGA
210 void integrator_restart(char mode, const char *cmd)
212 cm_control(CM_CTRL_RESET, CM_CTRL_RESET);