arch/sh/boards/snapgear/setup.c

   1 /****************************************************************************/
   2 /*
   3  * linux/arch/sh/boards/snapgear/setup.c
   4  *
   5  * Copyright (C) 2002  David McCullough <davidm@snapgear.com>
   6  * Copyright (C) 2003  Paul Mundt <lethal@linux-sh.org>
   7  *
   8  * Based on files with the following comments:
   9  *
  10  *           Copyright (C) 2000  Kazumoto Kojima
  11  *
  12  *           Modified for 7751 Solution Engine by
  13  *           Ian da Silva and Jeremy Siegel, 2001.
  14  */
  15 /****************************************************************************/
  16
  17 #include <linux/init.h>
  18 #include <linux/irq.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/timer.h>
  21 #include <linux/delay.h>
  22 #include <linux/module.h>
  23 #include <linux/sched.h>
  24
  25 #include <asm/machvec.h>
  26 #include <asm/mach/io.h>
  27 #include <asm/irq.h>
  28 #include <asm/io.h>
  29 #include <asm/cpu/timer.h>
  30
  31 extern void (*board_time_init)(void);
  32 extern void secureedge5410_rtc_init(void);
  33 extern void pcibios_init(void);
  34
  35 /****************************************************************************/
  36 /*
  37  * EraseConfig handling functions
  38  */
  39
  40 static irqreturn_t eraseconfig_interrupt(int irq, void *dev_id, struct pt_regs *regs)
  41 {
  42         volatile char dummy __attribute__((unused)) = * (volatile char *) 0xb8000000;
  43
  44         printk("SnapGear: erase switch interrupt!\n");
  45
  46         return IRQ_HANDLED;
  47 }
  48
  49 static int __init eraseconfig_init(void)
  50 {
  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",
  56                                 IRL0_IRQ);
  57         else
  58                 printk("SnapGear: registered EraseConfig switch on IRQ%d\n",
  59                                 IRL0_IRQ);
  60         return(0);
  61 }
  62
  63 module_init(eraseconfig_init);
  64
  65 /****************************************************************************/
  66 /*
  67  * Initialize IRQ setting
  68  *
  69  * IRL0 = erase switch
  70  * IRL1 = eth0
  71  * IRL2 = eth1
  72  * IRL3 = crypto
  73  */
  74
  75 static void __init init_snapgear_IRQ(void)
  76 {
  77         /* enable individual interrupt mode for externals */
  78         ctrl_outw(ctrl_inw(INTC_ICR) | INTC_ICR_IRLM, INTC_ICR);
  79
  80         printk("Setup SnapGear IRQ/IPR ...\n");
  81
  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);
  86 }
  87
  88 /****************************************************************************/
  89 /*
  90  *      Fast poll interrupt simulator.
  91  */
  92
  93 /*
  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
  97  */
  98 #if 0
  99 #define FAST_POLL       1000
 100 //#define FAST_POLL_INTR
 101
 102 #define FASTTIMER_IRQ   17
 103 #define FASTTIMER_IPR_ADDR  INTC_IPRA
 104 #define FASTTIMER_IPR_POS    2
 105 #define FASTTIMER_PRIORITY   3
 106
 107 #ifdef FAST_POLL_INTR
 108 #define TMU1_TCR_INIT   0x0020
 109 #else
 110 #define TMU1_TCR_INIT   0
 111 #endif
 112 #define TMU_TSTR_INIT   1
 113 #define TMU1_TCR_CALIB  0x0000
 114
 115
 116 #ifdef FAST_POLL_INTR
 117 static void fast_timer_irq(int irq, void *dev_instance, struct pt_regs *regs)
 118 {
 119         unsigned long timer_status;
 120     timer_status = ctrl_inw(TMU1_TCR);
 121         timer_status &= ~0x100;
 122         ctrl_outw(timer_status, TMU1_TCR);
 123 }
 124 #endif
 125
 126 /*
 127  * return the current ticks on the fast timer
 128  */
 129
 130 unsigned long fast_timer_count(void)
 131 {
 132         return(ctrl_inl(TMU1_TCNT));
 133 }
 134
 135 /*
 136  * setup a fast timer for profiling etc etc
 137  */
 138
 139 static void setup_fast_timer()
 140 {
 141         unsigned long interval;
 142
 143 #ifdef FAST_POLL_INTR
 144         interval = (current_cpu_data.module_clock/4 + FAST_POLL/2) / FAST_POLL;
 145
 146         make_ipr_irq(FASTTIMER_IRQ, FASTTIMER_IPR_ADDR, FASTTIMER_IPR_POS,
 147                         FASTTIMER_PRIORITY);
 148
 149         printk("SnapGear: %dHz fast timer on IRQ %d\n",FAST_POLL,FASTTIMER_IRQ);
 150
 151         if (request_irq(FASTTIMER_IRQ, fast_timer_irq, 0, "SnapGear fast timer",
 152                         NULL) != 0)
 153                 printk("%s(%d): request_irq() failed?\n", __FILE__, __LINE__);
 154 #else
 155         printk("SnapGear: fast timer running\n",FAST_POLL,FASTTIMER_IRQ);
 156         interval = 0xffffffff;
 157 #endif
 158
 159         ctrl_outb(ctrl_inb(TMU_TSTR) & ~0x2, TMU_TSTR); /* disable timer 1 */
 160         ctrl_outw(TMU1_TCR_INIT, TMU1_TCR);
 161         ctrl_outl(interval, TMU1_TCOR);
 162         ctrl_outl(interval, TMU1_TCNT);
 163         ctrl_outb(ctrl_inb(TMU_TSTR) | 0x2, TMU_TSTR); /* enable timer 1 */
 164
 165         printk("Timer count 1 = 0x%x\n", fast_timer_count());
 166         udelay(1000);
 167         printk("Timer count 2 = 0x%x\n", fast_timer_count());
 168 }
 169 #endif
 170
 171 /****************************************************************************/
 172
 173 const char *get_system_type(void)
 174 {
 175         return "SnapGear SecureEdge5410";
 176 }
 177
 178 /*
 179  * The Machine Vector
 180  */
 181
 182 struct sh_machine_vector mv_snapgear __initmv = {
 183         .mv_nr_irqs             = 72,
 184
 185         .mv_inb                 = snapgear_inb,
 186         .mv_inw                 = snapgear_inw,
 187         .mv_inl                 = snapgear_inl,
 188         .mv_outb                = snapgear_outb,
 189         .mv_outw                = snapgear_outw,
 190         .mv_outl                = snapgear_outl,
 191
 192         .mv_inb_p               = snapgear_inb_p,
 193         .mv_inw_p               = snapgear_inw,
 194         .mv_inl_p               = snapgear_inl,
 195         .mv_outb_p              = snapgear_outb_p,
 196         .mv_outw_p              = snapgear_outw,
 197         .mv_outl_p              = snapgear_outl,
 198
 199         .mv_isa_port2addr       = snapgear_isa_port2addr,
 200
 201         .mv_init_irq            = init_snapgear_IRQ,
 202 };
 203 ALIAS_MV(snapgear)
 204
 205 /*
 206  * Initialize the board
 207  */
 208
 209 int __init platform_setup(void)
 210 {
 211         board_time_init = secureedge5410_rtc_init;
 212
 213         return 0;
 214 }
 215