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rte_cb.c

/*
 * include/asm-v850/rte_cb.c -- Midas lab RTE-CB series of evaluation boards
 *
 *  Copyright (C) 2001,02,03  NEC Electronics Corporation
 *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of this
 * archive for more details.
 *
 * Written by Miles Bader <miles@gnu.org>
 */

#include <linux/init.h>
#include <linux/irq.h>
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/kernel.h>

#include <asm/machdep.h>
#include <asm/v850e_uart.h>

#include "mach.h"

static void led_tick (void);

/* LED access routines.  */
extern unsigned read_leds (int pos, char *buf, int len);
extern unsigned write_leds (int pos, const char *buf, int len);

#ifdef CONFIG_RTE_CB_MULTI
extern void multi_init (void);
#endif


void __init rte_cb_early_init (void)
{
      v850e_intc_disable_irqs ();

#ifdef CONFIG_RTE_CB_MULTI
      multi_init ();
#endif
}

void __init mach_setup (char **cmdline)
{
#ifdef CONFIG_RTE_MB_A_PCI
      /* Probe for Mother-A, and print a message if we find it.  */
      *(volatile unsigned long *)MB_A_SRAM_ADDR = 0xDEADBEEF;
      if (*(volatile unsigned long *)MB_A_SRAM_ADDR == 0xDEADBEEF) {
            *(volatile unsigned long *)MB_A_SRAM_ADDR = 0x12345678;
            if (*(volatile unsigned long *)MB_A_SRAM_ADDR == 0x12345678)
                  printk (KERN_INFO
                        "          NEC SolutionGear/Midas lab"
                        " RTE-MOTHER-A motherboard\n");
      }
#endif /* CONFIG_RTE_MB_A_PCI */

      mach_tick = led_tick;
}

void machine_restart (char *__unused)
{
#ifdef CONFIG_RESET_GUARD
      disable_reset_guard ();
#endif
      asm ("jmp r0"); /* Jump to the reset vector.  */
}

/* This says `HALt.' in LEDese.  */
static unsigned char halt_leds_msg[] = { 0x76, 0x77, 0x38, 0xF8 };

void machine_halt (void)
{
#ifdef CONFIG_RESET_GUARD
      disable_reset_guard ();
#endif

      /* Ignore all interrupts.  */
      local_irq_disable ();

      /* Write a little message.  */
      write_leds (0, halt_leds_msg, sizeof halt_leds_msg);

      /* Really halt.  */
      for (;;)
            asm ("halt; nop; nop; nop; nop; nop");
}

void machine_power_off (void)
{
      machine_halt ();
}


/* Animated LED display for timer tick.  */

#define TICK_UPD_FREQ   6
static int tick_frames[][10] = {
      { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, -1 },
      { 0x63, 0x5c, -1 },
      { 0x5c, 0x00, -1 },
      { 0x63, 0x00, -1 },
      { -1 }
};

static void led_tick ()
{
      static unsigned counter = 0;
      
      if (++counter == (HZ / TICK_UPD_FREQ)) {
            /* Which frame we're currently displaying for each digit.  */
            static unsigned frame_nums[LED_NUM_DIGITS] = { 0 };
            /* Display image.  */
            static unsigned char image[LED_NUM_DIGITS] = { 0 };
            unsigned char prev_image[LED_NUM_DIGITS];
            int write_to_leds = 1; /* true if we should actually display */
            int digit;

            /* We check to see if the physical LEDs contains what we last
               wrote to them; if not, we suppress display (this is so that
               users can write to the LEDs, and not have their output
               overwritten).  As a special case, we start writing again if
               all the LEDs are blank, or our display image is all zeros
               (indicating that this is the initial update, when the actual
               LEDs might contain random data).  */
            read_leds (0, prev_image, LED_NUM_DIGITS);
            for (digit = 0; digit < LED_NUM_DIGITS; digit++)
                  if (image[digit] != prev_image[digit]
                      && image[digit] && prev_image[digit])
                  {
                        write_to_leds = 0;
                        break;
                  }

            /* Update display image.  */
            for (digit = 0;
                 digit < LED_NUM_DIGITS && tick_frames[digit][0] >= 0;
                 digit++)
            {
                  int frame = tick_frames[digit][frame_nums[digit]];
                  if (frame < 0) {
                        image[digit] = tick_frames[digit][0];
                        frame_nums[digit] = 1;
                  } else {
                        image[digit] = frame;
                        frame_nums[digit]++;
                        break;
                  }
            }

            if (write_to_leds)
                  /* Write the display image to the physical LEDs.  */
                  write_leds (0, image, LED_NUM_DIGITS);

            counter = 0;
      }
}


/* Mother-A interrupts.  */

#ifdef CONFIG_RTE_GBUS_INT

#define L GBUS_INT_PRIORITY_LOW
#define M GBUS_INT_PRIORITY_MEDIUM
#define H GBUS_INT_PRIORITY_HIGH

static struct gbus_int_irq_init gbus_irq_inits[] = {
#ifdef CONFIG_RTE_MB_A_PCI
      { "MB_A_LAN",     IRQ_MB_A_LAN,           1,               1, L },
      { "MB_A_PCI1",    IRQ_MB_A_PCI1(0), IRQ_MB_A_PCI1_NUM,   1, L },
      { "MB_A_PCI2",    IRQ_MB_A_PCI2(0), IRQ_MB_A_PCI2_NUM,   1, L },
      { "MB_A_EXT",     IRQ_MB_A_EXT(0),  IRQ_MB_A_EXT_NUM,    1, L },
      { "MB_A_USB_OC",IRQ_MB_A_USB_OC(0), IRQ_MB_A_USB_OC_NUM, 1, L },
      { "MB_A_PCMCIA_OC",IRQ_MB_A_PCMCIA_OC,    1,               1, L },
#endif
      { 0 }
};
#define NUM_GBUS_IRQ_INITS (ARRAY_SIZE(gbus_irq_inits) - 1)

static struct hw_interrupt_type gbus_hw_itypes[NUM_GBUS_IRQ_INITS];

#endif /* CONFIG_RTE_GBUS_INT */


void __init rte_cb_init_irqs (void)
{
#ifdef CONFIG_RTE_GBUS_INT
      gbus_int_init_irqs ();
      gbus_int_init_irq_types (gbus_irq_inits, gbus_hw_itypes);
#endif /* CONFIG_RTE_GBUS_INT */
}

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