arch/mips/ddb5xxx/ddb5074/setup.c

   1 /*
   2  *  arch/mips/ddb5074/setup.c -- NEC DDB Vrc-5074 setup routines
   3  *
   4  *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
   5  *                     Sony Software Development Center Europe (SDCE), Brussels
   6  */
   7 #include <linux/init.h>
   8 #include <linux/kbd_ll.h>
   9 #include <linux/kernel.h>
  10 #include <linux/kdev_t.h>
  11 #include <linux/types.h>
  12 #include <linux/sched.h>
  13 #include <linux/pci.h>
  14 #include <linux/ide.h>
  15 #include <linux/ioport.h>
  16 #include <linux/irq.h>
  17
  18 #include <asm/addrspace.h>
  19 #include <asm/bcache.h>
  20 #include <asm/irq.h>
  21 #include <asm/reboot.h>
  22 #include <asm/gdb-stub.h>
  23 #include <asm/time.h>
  24 #include <asm/nile4.h>
  25 #include <asm/ddb5xxx/ddb5074.h>
  26 #include <asm/ddb5xxx/ddb5xxx.h>
  27
  28 static void (*back_to_prom) (void) = (void (*)(void)) 0xbfc00000;
  29
  30 static void ddb_machine_restart(char *command)
  31 {
  32         u32 t;
  33
  34         /* PCI cold reset */
  35         t = nile4_in32(NILE4_PCICTRL + 4);
  36         t |= 0x40000000;
  37         nile4_out32(NILE4_PCICTRL + 4, t);
  38         /* CPU cold reset */
  39         t = nile4_in32(NILE4_CPUSTAT);
  40         t |= 1;
  41         nile4_out32(NILE4_CPUSTAT, t);
  42         /* Call the PROM */
  43         back_to_prom();
  44 }
  45
  46 static void ddb_machine_halt(void)
  47 {
  48         printk("DDB Vrc-5074 halted.\n");
  49         do {
  50         } while (1);
  51 }
  52
  53 static void ddb_machine_power_off(void)
  54 {
  55         printk("DDB Vrc-5074 halted. Please turn off the power.\n");
  56         do {
  57         } while (1);
  58 }
  59
  60 extern void rtc_ds1386_init(unsigned long base);
  61
  62 extern void (*board_timer_setup) (struct irqaction * irq);
  63
  64 static void __init ddb_timer_init(struct irqaction *irq)
  65 {
  66         /* set the clock to 1 Hz */
  67         nile4_out32(NILE4_T2CTRL, 1000000);
  68         /* enable the General-Purpose Timer */
  69         nile4_out32(NILE4_T2CTRL + 4, 0x00000001);
  70         /* reset timer */
  71         nile4_out32(NILE4_T2CNTR, 0);
  72         /* enable interrupt */
  73         setup_irq(nile4_to_irq(NILE4_INT_GPT), irq);
  74         nile4_enable_irq(nile4_to_irq(NILE4_INT_GPT));
  75         change_c0_status(ST0_IM,
  76                           IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4);
  77
  78 }
  79
  80 static void __init ddb_time_init(void)
  81 {
  82         /* we have ds1396 RTC chip */
  83         rtc_ds1386_init(KSEG1ADDR(DDB_PCI_MEM_BASE));
  84 }
  85
  86
  87
  88 static void __init ddb5074_setup(void)
  89 {
  90         set_io_port_base(NILE4_PCI_IO_BASE);
  91         isa_slot_offset = NILE4_PCI_MEM_BASE;
  92         board_timer_setup = ddb_timer_init;
  93         board_time_init = ddb_time_init;
  94
  95
  96         _machine_restart = ddb_machine_restart;
  97         _machine_halt = ddb_machine_halt;
  98         _machine_power_off = ddb_machine_power_off;
  99
 100         ddb_out32(DDB_BAR0, 0);
 101
 102         ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IO, 0, 0x10);
 103         ddb_set_pmr(DDB_PCIINIT1, DDB_PCICMD_MEM, DDB_PCI_MEM_BASE , 0x10);
 104
 105         /* Reboot on panic */
 106         panic_timeout = 180;
 107 }
 108
 109 early_initcall(ddb5074_setup);
 110
 111 #define USE_NILE4_SERIAL        0
 112
 113 #if USE_NILE4_SERIAL
 114 #define ns16550_in(reg)         nile4_in8((reg)*8)
 115 #define ns16550_out(reg, val)   nile4_out8((reg)*8, (val))
 116 #else
 117 #define NS16550_BASE            (NILE4_PCI_IO_BASE+0x03f8)
 118 static inline u8 ns16550_in(u32 reg)
 119 {
 120         return *(volatile u8 *) (NS16550_BASE + reg);
 121 }
 122
 123 static inline void ns16550_out(u32 reg, u8 val)
 124 {
 125         *(volatile u8 *) (NS16550_BASE + reg) = val;
 126 }
 127 #endif
 128
 129 #define NS16550_RBR             0
 130 #define NS16550_THR             0
 131 #define NS16550_DLL             0
 132 #define NS16550_IER             1
 133 #define NS16550_DLM             1
 134 #define NS16550_FCR             2
 135 #define NS16550_IIR             2
 136 #define NS16550_LCR             3
 137 #define NS16550_MCR             4
 138 #define NS16550_LSR             5
 139 #define NS16550_MSR             6
 140 #define NS16550_SCR             7
 141
 142 #define NS16550_LSR_DR          0x01    /* Data ready */
 143 #define NS16550_LSR_OE          0x02    /* Overrun */
 144 #define NS16550_LSR_PE          0x04    /* Parity error */
 145 #define NS16550_LSR_FE          0x08    /* Framing error */
 146 #define NS16550_LSR_BI          0x10    /* Break */
 147 #define NS16550_LSR_THRE        0x20    /* Xmit holding register empty */
 148 #define NS16550_LSR_TEMT        0x40    /* Xmitter empty */
 149 #define NS16550_LSR_ERR         0x80    /* Error */
 150
 151
 152 void _serinit(void)
 153 {
 154 #if USE_NILE4_SERIAL
 155         ns16550_out(NS16550_LCR, 0x80);
 156         ns16550_out(NS16550_DLM, 0x00);
 157         ns16550_out(NS16550_DLL, 0x36); /* 9600 baud */
 158         ns16550_out(NS16550_LCR, 0x00);
 159         ns16550_out(NS16550_LCR, 0x03);
 160         ns16550_out(NS16550_FCR, 0x47);
 161 #else
 162         /* done by PMON */
 163 #endif
 164 }
 165
 166 void _putc(char c)
 167 {
 168         while (!(ns16550_in(NS16550_LSR) & NS16550_LSR_THRE));
 169         ns16550_out(NS16550_THR, c);
 170         if (c == '\n') {
 171                 while (!(ns16550_in(NS16550_LSR) & NS16550_LSR_THRE));
 172                 ns16550_out(NS16550_THR, '\r');
 173         }
 174 }
 175
 176 void _puts(const char *s)
 177 {
 178         char c;
 179         while ((c = *s++))
 180                 _putc(c);
 181 }
 182
 183 char _getc(void)
 184 {
 185         while (!(ns16550_in(NS16550_LSR) & NS16550_LSR_DR));
 186         return ns16550_in(NS16550_RBR);
 187 }
 188
 189 int _testc(void)
 190 {
 191         return (ns16550_in(NS16550_LSR) & NS16550_LSR_DR) != 0;
 192 }
 193
 194
 195 /*
 196  *  Hexadecimal 7-segment LED
 197  */
 198 void ddb5074_led_hex(int hex)
 199 {
 200         outb(hex, 0x80);
 201 }
 202
 203
 204 /*
 205  *  LEDs D2 and D3, connected to the GPIO pins of the PMU in the ALi M1543
 206  */
 207 struct pci_dev *pci_pmu = NULL;
 208
 209 void ddb5074_led_d2(int on)
 210 {
 211         u8 t;
 212
 213         if (pci_pmu) {
 214                 pci_read_config_byte(pci_pmu, 0x7e, &t);
 215                 if (on)
 216                         t &= 0x7f;
 217                 else
 218                         t |= 0x80;
 219                 pci_write_config_byte(pci_pmu, 0x7e, t);
 220         }
 221 }
 222
 223 void ddb5074_led_d3(int on)
 224 {
 225         u8 t;
 226
 227         if (pci_pmu) {
 228                 pci_read_config_byte(pci_pmu, 0x7e, &t);
 229                 if (on)
 230                         t &= 0xbf;
 231                 else
 232                         t |= 0x40;
 233                 pci_write_config_byte(pci_pmu, 0x7e, t);
 234         }
 235 }