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>
31 extern void (*board_time_init)(void);
32 extern void secureedge5410_rtc_init(void);
33 extern void pcibios_init(void);
35 /****************************************************************************/
37 * EraseConfig handling functions
40 static irqreturn_t eraseconfig_interrupt(int irq, void *dev_id, struct pt_regs *regs)
42 volatile char dummy __attribute__((unused)) = * (volatile char *) 0xb8000000;
44 printk("SnapGear: erase switch interrupt!\n");
49 static int __init eraseconfig_init(void)
51 printk("SnapGear: EraseConfig init\n");
52 /* Setup "EraseConfig" switch on external IRQ 0 */
53 if (request_irq(IRL0_IRQ, eraseconfig_interrupt, SA_INTERRUPT,
54 "Erase Config", NULL))
55 printk("SnapGear: failed to register IRQ%d for Reset witch\n",
58 printk("SnapGear: registered EraseConfig switch on IRQ%d\n",
63 module_init(eraseconfig_init);
65 /****************************************************************************/
67 * Initialize IRQ setting
75 static void __init init_snapgear_IRQ(void)
77 /* enable individual interrupt mode for externals */
78 ctrl_outw(ctrl_inw(INTC_ICR) | INTC_ICR_IRLM, INTC_ICR);
80 printk("Setup SnapGear IRQ/IPR ...\n");
82 make_ipr_irq(IRL0_IRQ, IRL0_IPR_ADDR, IRL0_IPR_POS, IRL0_PRIORITY);
83 make_ipr_irq(IRL1_IRQ, IRL1_IPR_ADDR, IRL1_IPR_POS, IRL1_PRIORITY);
84 make_ipr_irq(IRL2_IRQ, IRL2_IPR_ADDR, IRL2_IPR_POS, IRL2_PRIORITY);
85 make_ipr_irq(IRL3_IRQ, IRL3_IPR_ADDR, IRL3_IPR_POS, IRL3_PRIORITY);
88 /****************************************************************************/
90 * Fast poll interrupt simulator.
94 * Leave all of the fast timer/fast poll stuff commented out for now, since
95 * it's not clear whether it actually works or not. Since it wasn't being used
96 * at all in 2.4, we'll assume it's not sane for 2.6 either.. -- PFM
99 #define FAST_POLL 1000
100 //#define FAST_POLL_INTR
102 #define FASTTIMER_IRQ 17
103 #define FASTTIMER_IPR_ADDR INTC_IPRA
104 #define FASTTIMER_IPR_POS 2
105 #define FASTTIMER_PRIORITY 3
107 #ifdef FAST_POLL_INTR
108 #define TMU1_TCR_INIT 0x0020
110 #define TMU1_TCR_INIT 0
112 #define TMU_TSTR_INIT 1
113 #define TMU1_TCR_CALIB 0x0000
114 #define TMU_TOCR 0xffd80000 /* Byte access */
115 #define TMU_TSTR 0xffd80004 /* Byte access */
116 #define TMU1_TCOR 0xffd80014 /* Long access */
117 #define TMU1_TCNT 0xffd80018 /* Long access */
118 #define TMU1_TCR 0xffd8001c /* Word access */
121 #ifdef FAST_POLL_INTR
122 static void fast_timer_irq(int irq, void *dev_instance, struct pt_regs *regs)
124 unsigned long timer_status;
125 timer_status = ctrl_inw(TMU1_TCR);
126 timer_status &= ~0x100;
127 ctrl_outw(timer_status, TMU1_TCR);
132 * return the current ticks on the fast timer
135 unsigned long fast_timer_count(void)
137 return(ctrl_inl(TMU1_TCNT));
141 * setup a fast timer for profiling etc etc
144 static void setup_fast_timer()
146 unsigned long interval;
148 #ifdef FAST_POLL_INTR
149 interval = (current_cpu_data.module_clock/4 + FAST_POLL/2) / FAST_POLL;
151 make_ipr_irq(FASTTIMER_IRQ, FASTTIMER_IPR_ADDR, FASTTIMER_IPR_POS,
154 printk("SnapGear: %dHz fast timer on IRQ %d\n",FAST_POLL,FASTTIMER_IRQ);
156 if (request_irq(FASTTIMER_IRQ, fast_timer_irq, 0, "SnapGear fast timer",
158 printk("%s(%d): request_irq() failed?\n", __FILE__, __LINE__);
160 printk("SnapGear: fast timer running\n",FAST_POLL,FASTTIMER_IRQ);
161 interval = 0xffffffff;
164 ctrl_outb(ctrl_inb(TMU_TSTR) & ~0x2, TMU_TSTR); /* disable timer 1 */
165 ctrl_outw(TMU1_TCR_INIT, TMU1_TCR);
166 ctrl_outl(interval, TMU1_TCOR);
167 ctrl_outl(interval, TMU1_TCNT);
168 ctrl_outb(ctrl_inb(TMU_TSTR) | 0x2, TMU_TSTR); /* enable timer 1 */
170 printk("Timer count 1 = 0x%x\n", fast_timer_count());
172 printk("Timer count 2 = 0x%x\n", fast_timer_count());
176 /****************************************************************************/
178 const char *get_system_type(void)
180 return "SnapGear SecureEdge5410";
187 struct sh_machine_vector mv_snapgear __initmv = {
190 .mv_inb = snapgear_inb,
191 .mv_inw = snapgear_inw,
192 .mv_inl = snapgear_inl,
193 .mv_outb = snapgear_outb,
194 .mv_outw = snapgear_outw,
195 .mv_outl = snapgear_outl,
197 .mv_inb_p = snapgear_inb_p,
198 .mv_inw_p = snapgear_inw,
199 .mv_inl_p = snapgear_inl,
200 .mv_outb_p = snapgear_outb_p,
201 .mv_outw_p = snapgear_outw,
202 .mv_outl_p = snapgear_outl,
204 .mv_isa_port2addr = snapgear_isa_port2addr,
206 .mv_init_irq = init_snapgear_IRQ,
211 * Initialize the board
214 int __init platform_setup(void)
216 board_time_init = secureedge5410_rtc_init;