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/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>
  25
  26 #include <asm/machvec.h>
  27 #include <asm/mach/io.h>
  28 #include <asm/irq.h>
  29 #include <asm/io.h>
  30 #include <asm/cpu/timer.h>
  31
  32 extern void (*board_time_init)(void);
  33 extern void secureedge5410_rtc_init(void);
  34 extern void pcibios_init(void);
  35
  36 /****************************************************************************/
  37 /*
  38  * EraseConfig handling functions
  39  */
  40
  41 static irqreturn_t eraseconfig_interrupt(int irq, void *dev_id, struct pt_regs *regs)
  42 {
  43         volatile char dummy __attribute__((unused)) = * (volatile char *) 0xb8000000;
  44
  45         printk("SnapGear: erase switch interrupt!\n");
  46
  47         return IRQ_HANDLED;
  48 }
  49
  50 static int __init eraseconfig_init(void)
  51 {
  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",
  57                                 IRL0_IRQ);
  58         else
  59                 printk("SnapGear: registered EraseConfig switch on IRQ%d\n",
  60                                 IRL0_IRQ);
  61         return(0);
  62 }
  63
  64 module_init(eraseconfig_init);
  65
  66 /****************************************************************************/
  67 /*
  68  * Initialize IRQ setting
  69  *
  70  * IRL0 = erase switch
  71  * IRL1 = eth0
  72  * IRL2 = eth1
  73  * IRL3 = crypto
  74  */
  75
  76 static void __init init_snapgear_IRQ(void)
  77 {
  78         /* enable individual interrupt mode for externals */
  79         ctrl_outw(ctrl_inw(INTC_ICR) | INTC_ICR_IRLM, INTC_ICR);
  80
  81         printk("Setup SnapGear IRQ/IPR ...\n");
  82
  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);
  87 }
  88
  89 /****************************************************************************/
  90 /*
  91  *      Fast poll interrupt simulator.
  92  */
  93
  94 /*
  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
  98  */
  99 #if 0
 100 #define FAST_POLL       1000
 101 //#define FAST_POLL_INTR
 102
 103 #define FASTTIMER_IRQ   17
 104 #define FASTTIMER_IPR_ADDR  INTC_IPRA
 105 #define FASTTIMER_IPR_POS    2
 106 #define FASTTIMER_PRIORITY   3
 107
 108 #ifdef FAST_POLL_INTR
 109 #define TMU1_TCR_INIT   0x0020
 110 #else
 111 #define TMU1_TCR_INIT   0
 112 #endif
 113 #define TMU_TSTR_INIT   1
 114 #define TMU1_TCR_CALIB  0x0000
 115
 116
 117 #ifdef FAST_POLL_INTR
 118 static void fast_timer_irq(int irq, void *dev_instance, struct pt_regs *regs)
 119 {
 120         unsigned long timer_status;
 121     timer_status = ctrl_inw(TMU1_TCR);
 122         timer_status &= ~0x100;
 123         ctrl_outw(timer_status, TMU1_TCR);
 124 }
 125 #endif
 126
 127 /*
 128  * return the current ticks on the fast timer
 129  */
 130
 131 unsigned long fast_timer_count(void)
 132 {
 133         return(ctrl_inl(TMU1_TCNT));
 134 }
 135
 136 /*
 137  * setup a fast timer for profiling etc etc
 138  */
 139
 140 static void setup_fast_timer()
 141 {
 142         unsigned long interval;
 143
 144 #ifdef FAST_POLL_INTR
 145         interval = (current_cpu_data.module_clock/4 + FAST_POLL/2) / FAST_POLL;
 146
 147         make_ipr_irq(FASTTIMER_IRQ, FASTTIMER_IPR_ADDR, FASTTIMER_IPR_POS,
 148                         FASTTIMER_PRIORITY);
 149
 150         printk("SnapGear: %dHz fast timer on IRQ %d\n",FAST_POLL,FASTTIMER_IRQ);
 151
 152         if (request_irq(FASTTIMER_IRQ, fast_timer_irq, 0, "SnapGear fast timer",
 153                         NULL) != 0)
 154                 printk("%s(%d): request_irq() failed?\n", __FILE__, __LINE__);
 155 #else
 156         printk("SnapGear: fast timer running\n",FAST_POLL,FASTTIMER_IRQ);
 157         interval = 0xffffffff;
 158 #endif
 159
 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 */
 165
 166         printk("Timer count 1 = 0x%x\n", fast_timer_count());
 167         udelay(1000);
 168         printk("Timer count 2 = 0x%x\n", fast_timer_count());
 169 }
 170 #endif
 171
 172 /****************************************************************************/
 173
 174 const char *get_system_type(void)
 175 {
 176         return "SnapGear SecureEdge5410";
 177 }
 178
 179 /*
 180  * The Machine Vector
 181  */
 182
 183 struct sh_machine_vector mv_snapgear __initmv = {
 184         .mv_nr_irqs             = 72,
 185
 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,
 192
 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,
 199
 200         .mv_isa_port2addr       = snapgear_isa_port2addr,
 201
 202         .mv_init_irq            = init_snapgear_IRQ,
 203 };
 204 ALIAS_MV(snapgear)
 205
 206 /*
 207  * Initialize the board
 208  */
 209
 210 int __init platform_setup(void)
 211 {
 212         board_time_init = secureedge5410_rtc_init;
 213
 214         return 0;
 215 }
 216