1 /****************************************************************************/
3 * linux/arch/sh/boards/snapgear/setup.c
5 * Copyright (C) 2002 David McCullough <davidm@snapgear.com>
6 * Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
8 * Based on files with the following comments:
10 * Copyright (C) 2000 Kazumoto Kojima
12 * Modified for 7751 Solution Engine by
13 * Ian da Silva and Jeremy Siegel, 2001.
15 /****************************************************************************/
17 #include <linux/config.h>
18 #include <linux/init.h>
19 #include <linux/irq.h>
20 #include <linux/interrupt.h>
21 #include <linux/timer.h>
22 #include <linux/delay.h>
23 #include <linux/module.h>
24 #include <linux/sched.h>
26 #include <asm/machvec.h>
27 #include <asm/mach/io.h>
30 #include <asm/cpu/timer.h>
32 extern void (*board_time_init)(void);
33 extern void secureedge5410_rtc_init(void);
34 extern void pcibios_init(void);
36 /****************************************************************************/
38 * EraseConfig handling functions
41 static irqreturn_t eraseconfig_interrupt(int irq, void *dev_id, struct pt_regs *regs)
43 volatile char dummy __attribute__((unused)) = * (volatile char *) 0xb8000000;
45 printk("SnapGear: erase switch interrupt!\n");
50 static int __init eraseconfig_init(void)
52 printk("SnapGear: EraseConfig init\n");
53 /* Setup "EraseConfig" switch on external IRQ 0 */
54 if (request_irq(IRL0_IRQ, eraseconfig_interrupt, SA_INTERRUPT,
55 "Erase Config", NULL))
56 printk("SnapGear: failed to register IRQ%d for Reset witch\n",
59 printk("SnapGear: registered EraseConfig switch on IRQ%d\n",
64 module_init(eraseconfig_init);
66 /****************************************************************************/
68 * Initialize IRQ setting
76 static void __init init_snapgear_IRQ(void)
78 /* enable individual interrupt mode for externals */
79 ctrl_outw(ctrl_inw(INTC_ICR) | INTC_ICR_IRLM, INTC_ICR);
81 printk("Setup SnapGear IRQ/IPR ...\n");
83 make_ipr_irq(IRL0_IRQ, IRL0_IPR_ADDR, IRL0_IPR_POS, IRL0_PRIORITY);
84 make_ipr_irq(IRL1_IRQ, IRL1_IPR_ADDR, IRL1_IPR_POS, IRL1_PRIORITY);
85 make_ipr_irq(IRL2_IRQ, IRL2_IPR_ADDR, IRL2_IPR_POS, IRL2_PRIORITY);
86 make_ipr_irq(IRL3_IRQ, IRL3_IPR_ADDR, IRL3_IPR_POS, IRL3_PRIORITY);
89 /****************************************************************************/
91 * Fast poll interrupt simulator.
95 * Leave all of the fast timer/fast poll stuff commented out for now, since
96 * it's not clear whether it actually works or not. Since it wasn't being used
97 * at all in 2.4, we'll assume it's not sane for 2.6 either.. -- PFM
100 #define FAST_POLL 1000
101 //#define FAST_POLL_INTR
103 #define FASTTIMER_IRQ 17
104 #define FASTTIMER_IPR_ADDR INTC_IPRA
105 #define FASTTIMER_IPR_POS 2
106 #define FASTTIMER_PRIORITY 3
108 #ifdef FAST_POLL_INTR
109 #define TMU1_TCR_INIT 0x0020
111 #define TMU1_TCR_INIT 0
113 #define TMU_TSTR_INIT 1
114 #define TMU1_TCR_CALIB 0x0000
117 #ifdef FAST_POLL_INTR
118 static void fast_timer_irq(int irq, void *dev_instance, struct pt_regs *regs)
120 unsigned long timer_status;
121 timer_status = ctrl_inw(TMU1_TCR);
122 timer_status &= ~0x100;
123 ctrl_outw(timer_status, TMU1_TCR);
128 * return the current ticks on the fast timer
131 unsigned long fast_timer_count(void)
133 return(ctrl_inl(TMU1_TCNT));
137 * setup a fast timer for profiling etc etc
140 static void setup_fast_timer()
142 unsigned long interval;
144 #ifdef FAST_POLL_INTR
145 interval = (current_cpu_data.module_clock/4 + FAST_POLL/2) / FAST_POLL;
147 make_ipr_irq(FASTTIMER_IRQ, FASTTIMER_IPR_ADDR, FASTTIMER_IPR_POS,
150 printk("SnapGear: %dHz fast timer on IRQ %d\n",FAST_POLL,FASTTIMER_IRQ);
152 if (request_irq(FASTTIMER_IRQ, fast_timer_irq, 0, "SnapGear fast timer",
154 printk("%s(%d): request_irq() failed?\n", __FILE__, __LINE__);
156 printk("SnapGear: fast timer running\n",FAST_POLL,FASTTIMER_IRQ);
157 interval = 0xffffffff;
160 ctrl_outb(ctrl_inb(TMU_TSTR) & ~0x2, TMU_TSTR); /* disable timer 1 */
161 ctrl_outw(TMU1_TCR_INIT, TMU1_TCR);
162 ctrl_outl(interval, TMU1_TCOR);
163 ctrl_outl(interval, TMU1_TCNT);
164 ctrl_outb(ctrl_inb(TMU_TSTR) | 0x2, TMU_TSTR); /* enable timer 1 */
166 printk("Timer count 1 = 0x%x\n", fast_timer_count());
168 printk("Timer count 2 = 0x%x\n", fast_timer_count());
172 /****************************************************************************/
174 const char *get_system_type(void)
176 return "SnapGear SecureEdge5410";
183 struct sh_machine_vector mv_snapgear __initmv = {
186 .mv_inb = snapgear_inb,
187 .mv_inw = snapgear_inw,
188 .mv_inl = snapgear_inl,
189 .mv_outb = snapgear_outb,
190 .mv_outw = snapgear_outw,
191 .mv_outl = snapgear_outl,
193 .mv_inb_p = snapgear_inb_p,
194 .mv_inw_p = snapgear_inw,
195 .mv_inl_p = snapgear_inl,
196 .mv_outb_p = snapgear_outb_p,
197 .mv_outw_p = snapgear_outw,
198 .mv_outl_p = snapgear_outl,
200 .mv_isa_port2addr = snapgear_isa_port2addr,
202 .mv_init_irq = init_snapgear_IRQ,
207 * Initialize the board
210 int __init platform_setup(void)
212 board_time_init = secureedge5410_rtc_init;